drivers/scsi/smartpqi/smartpqi_init.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    driver for Microchip PQI-based storage controllers
   4  *    Copyright (c) 2019-2023 Microchip Technology Inc. and its subsidiaries
   5  *    Copyright (c) 2016-2018 Microsemi Corporation
   6  *    Copyright (c) 2016 PMC-Sierra, Inc.
   7  *
   8  *    Questions/Comments/Bugfixes to storagedev@microchip.com
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/pci.h>
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/sched.h>
  18 #include <linux/rtc.h>
  19 #include <linux/bcd.h>
  20 #include <linux/reboot.h>
  21 #include <linux/cciss_ioctl.h>
  22 #include <linux/blk-mq-pci.h>
  23 #include <scsi/scsi_host.h>
  24 #include <scsi/scsi_cmnd.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_eh.h>
  27 #include <scsi/scsi_transport_sas.h>
  28 #include <asm/unaligned.h>
  29 #include "smartpqi.h"
  30 #include "smartpqi_sis.h"
  31
  32 #if !defined(BUILD_TIMESTAMP)
  33 #define BUILD_TIMESTAMP
  34 #endif
  35
  36 #define DRIVER_VERSION          "2.1.22-040"
  37 #define DRIVER_MAJOR            2
  38 #define DRIVER_MINOR            1
  39 #define DRIVER_RELEASE          22
  40 #define DRIVER_REVISION         40
  41
  42 #define DRIVER_NAME             "Microchip SmartPQI Driver (v" \
  43                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  44 #define DRIVER_NAME_SHORT       "smartpqi"
  45
  46 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  47
  48 #define PQI_POST_RESET_DELAY_SECS                       5
  49 #define PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS      10
  50
  51 MODULE_AUTHOR("Microchip");
  52 MODULE_DESCRIPTION("Driver for Microchip Smart Family Controller version "
  53         DRIVER_VERSION);
  54 MODULE_VERSION(DRIVER_VERSION);
  55 MODULE_LICENSE("GPL");
  56
  57 struct pqi_cmd_priv {
  58         int this_residual;
  59 };
  60
  61 static struct pqi_cmd_priv *pqi_cmd_priv(struct scsi_cmnd *cmd)
  62 {
  63         return scsi_cmd_priv(cmd);
  64 }
  65
  66 static void pqi_verify_structures(void);
  67 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
  68         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason);
  69 static void pqi_ctrl_offline_worker(struct work_struct *work);
  70 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  71 static void pqi_scan_start(struct Scsi_Host *shost);
  72 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  73         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  74         struct pqi_io_request *io_request);
  75 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  76         struct pqi_iu_header *request, unsigned int flags,
  77         struct pqi_raid_error_info *error_info);
  78 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  79         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  80         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  81         struct pqi_encryption_info *encryption_info, bool raid_bypass, bool io_high_prio);
  82 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
  83         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
  84         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
  85         struct pqi_scsi_dev_raid_map_data *rmd);
  86 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
  87         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
  88         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
  89         struct pqi_scsi_dev_raid_map_data *rmd);
  90 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
  91 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
  92 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs);
  93 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info);
  94 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
  95 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
  96 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
  97         struct pqi_scsi_dev *device, u8 lun, unsigned long timeout_msecs);
  98 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info);
  99
 100 /* for flags argument to pqi_submit_raid_request_synchronous() */
 101 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
 102
 103 static struct scsi_transport_template *pqi_sas_transport_template;
 104
 105 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
 106
 107 enum pqi_lockup_action {
 108         NONE,
 109         REBOOT,
 110         PANIC
 111 };
 112
 113 static enum pqi_lockup_action pqi_lockup_action = NONE;
 114
 115 static struct {
 116         enum pqi_lockup_action  action;
 117         char                    *name;
 118 } pqi_lockup_actions[] = {
 119         {
 120                 .action = NONE,
 121                 .name = "none",
 122         },
 123         {
 124                 .action = REBOOT,
 125                 .name = "reboot",
 126         },
 127         {
 128                 .action = PANIC,
 129                 .name = "panic",
 130         },
 131 };
 132
 133 static unsigned int pqi_supported_event_types[] = {
 134         PQI_EVENT_TYPE_HOTPLUG,
 135         PQI_EVENT_TYPE_HARDWARE,
 136         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 137         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 138         PQI_EVENT_TYPE_OFA,
 139         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 140         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 141 };
 142
 143 static int pqi_disable_device_id_wildcards;
 144 module_param_named(disable_device_id_wildcards,
 145         pqi_disable_device_id_wildcards, int, 0644);
 146 MODULE_PARM_DESC(disable_device_id_wildcards,
 147         "Disable device ID wildcards.");
 148
 149 static int pqi_disable_heartbeat;
 150 module_param_named(disable_heartbeat,
 151         pqi_disable_heartbeat, int, 0644);
 152 MODULE_PARM_DESC(disable_heartbeat,
 153         "Disable heartbeat.");
 154
 155 static int pqi_disable_ctrl_shutdown;
 156 module_param_named(disable_ctrl_shutdown,
 157         pqi_disable_ctrl_shutdown, int, 0644);
 158 MODULE_PARM_DESC(disable_ctrl_shutdown,
 159         "Disable controller shutdown when controller locked up.");
 160
 161 static char *pqi_lockup_action_param;
 162 module_param_named(lockup_action,
 163         pqi_lockup_action_param, charp, 0644);
 164 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 165         "\t\tSupported: none, reboot, panic\n"
 166         "\t\tDefault: none");
 167
 168 static int pqi_expose_ld_first;
 169 module_param_named(expose_ld_first,
 170         pqi_expose_ld_first, int, 0644);
 171 MODULE_PARM_DESC(expose_ld_first, "Expose logical drives before physical drives.");
 172
 173 static int pqi_hide_vsep;
 174 module_param_named(hide_vsep,
 175         pqi_hide_vsep, int, 0644);
 176 MODULE_PARM_DESC(hide_vsep, "Hide the virtual SEP for direct attached drives.");
 177
 178 static int pqi_disable_managed_interrupts;
 179 module_param_named(disable_managed_interrupts,
 180         pqi_disable_managed_interrupts, int, 0644);
 181 MODULE_PARM_DESC(disable_managed_interrupts,
 182         "Disable the kernel automatically assigning SMP affinity to IRQs.");
 183
 184 static unsigned int pqi_ctrl_ready_timeout_secs;
 185 module_param_named(ctrl_ready_timeout,
 186         pqi_ctrl_ready_timeout_secs, uint, 0644);
 187 MODULE_PARM_DESC(ctrl_ready_timeout,
 188         "Timeout in seconds for driver to wait for controller ready.");
 189
 190 static char *raid_levels[] = {
 191         "RAID-0",
 192         "RAID-4",
 193         "RAID-1(1+0)",
 194         "RAID-5",
 195         "RAID-5+1",
 196         "RAID-6",
 197         "RAID-1(Triple)",
 198 };
 199
 200 static char *pqi_raid_level_to_string(u8 raid_level)
 201 {
 202         if (raid_level < ARRAY_SIZE(raid_levels))
 203                 return raid_levels[raid_level];
 204
 205         return "RAID UNKNOWN";
 206 }
 207
 208 #define SA_RAID_0               0
 209 #define SA_RAID_4               1
 210 #define SA_RAID_1               2       /* also used for RAID 10 */
 211 #define SA_RAID_5               3       /* also used for RAID 50 */
 212 #define SA_RAID_51              4
 213 #define SA_RAID_6               5       /* also used for RAID 60 */
 214 #define SA_RAID_TRIPLE          6       /* also used for RAID 1+0 Triple */
 215 #define SA_RAID_MAX             SA_RAID_TRIPLE
 216 #define SA_RAID_UNKNOWN         0xff
 217
 218 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 219 {
 220         pqi_prep_for_scsi_done(scmd);
 221         scsi_done(scmd);
 222 }
 223
 224 static inline void pqi_disable_write_same(struct scsi_device *sdev)
 225 {
 226         sdev->no_write_same = 1;
 227 }
 228
 229 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 230 {
 231         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 232 }
 233
 234 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 235 {
 236         return !device->is_physical_device;
 237 }
 238
 239 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 240 {
 241         return scsi3addr[2] != 0;
 242 }
 243
 244 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 245 {
 246         return !ctrl_info->controller_online;
 247 }
 248
 249 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 250 {
 251         if (ctrl_info->controller_online)
 252                 if (!sis_is_firmware_running(ctrl_info))
 253                         pqi_take_ctrl_offline(ctrl_info, PQI_FIRMWARE_KERNEL_NOT_UP);
 254 }
 255
 256 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 257 {
 258         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 259 }
 260
 261 #define PQI_DRIVER_SCRATCH_PQI_MODE                     0x1
 262 #define PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED          0x2
 263
 264 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(struct pqi_ctrl_info *ctrl_info)
 265 {
 266         return sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_PQI_MODE ? PQI_MODE : SIS_MODE;
 267 }
 268
 269 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 270         enum pqi_ctrl_mode mode)
 271 {
 272         u32 driver_scratch;
 273
 274         driver_scratch = sis_read_driver_scratch(ctrl_info);
 275
 276         if (mode == PQI_MODE)
 277                 driver_scratch |= PQI_DRIVER_SCRATCH_PQI_MODE;
 278         else
 279                 driver_scratch &= ~PQI_DRIVER_SCRATCH_PQI_MODE;
 280
 281         sis_write_driver_scratch(ctrl_info, driver_scratch);
 282 }
 283
 284 static inline bool pqi_is_fw_triage_supported(struct pqi_ctrl_info *ctrl_info)
 285 {
 286         return (sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED) != 0;
 287 }
 288
 289 static inline void pqi_save_fw_triage_setting(struct pqi_ctrl_info *ctrl_info, bool is_supported)
 290 {
 291         u32 driver_scratch;
 292
 293         driver_scratch = sis_read_driver_scratch(ctrl_info);
 294
 295         if (is_supported)
 296                 driver_scratch |= PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
 297         else
 298                 driver_scratch &= ~PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
 299
 300         sis_write_driver_scratch(ctrl_info, driver_scratch);
 301 }
 302
 303 static inline void pqi_ctrl_block_scan(struct pqi_ctrl_info *ctrl_info)
 304 {
 305         ctrl_info->scan_blocked = true;
 306         mutex_lock(&ctrl_info->scan_mutex);
 307 }
 308
 309 static inline void pqi_ctrl_unblock_scan(struct pqi_ctrl_info *ctrl_info)
 310 {
 311         ctrl_info->scan_blocked = false;
 312         mutex_unlock(&ctrl_info->scan_mutex);
 313 }
 314
 315 static inline bool pqi_ctrl_scan_blocked(struct pqi_ctrl_info *ctrl_info)
 316 {
 317         return ctrl_info->scan_blocked;
 318 }
 319
 320 static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info)
 321 {
 322         mutex_lock(&ctrl_info->lun_reset_mutex);
 323 }
 324
 325 static inline void pqi_ctrl_unblock_device_reset(struct pqi_ctrl_info *ctrl_info)
 326 {
 327         mutex_unlock(&ctrl_info->lun_reset_mutex);
 328 }
 329
 330 static inline void pqi_scsi_block_requests(struct pqi_ctrl_info *ctrl_info)
 331 {
 332         struct Scsi_Host *shost;
 333         unsigned int num_loops;
 334         int msecs_sleep;
 335
 336         shost = ctrl_info->scsi_host;
 337
 338         scsi_block_requests(shost);
 339
 340         num_loops = 0;
 341         msecs_sleep = 20;
 342         while (scsi_host_busy(shost)) {
 343                 num_loops++;
 344                 if (num_loops == 10)
 345                         msecs_sleep = 500;
 346                 msleep(msecs_sleep);
 347         }
 348 }
 349
 350 static inline void pqi_scsi_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 351 {
 352         scsi_unblock_requests(ctrl_info->scsi_host);
 353 }
 354
 355 static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
 356 {
 357         atomic_inc(&ctrl_info->num_busy_threads);
 358 }
 359
 360 static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
 361 {
 362         atomic_dec(&ctrl_info->num_busy_threads);
 363 }
 364
 365 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 366 {
 367         return ctrl_info->block_requests;
 368 }
 369
 370 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 371 {
 372         ctrl_info->block_requests = true;
 373 }
 374
 375 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 376 {
 377         ctrl_info->block_requests = false;
 378         wake_up_all(&ctrl_info->block_requests_wait);
 379 }
 380
 381 static void pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 382 {
 383         if (!pqi_ctrl_blocked(ctrl_info))
 384                 return;
 385
 386         atomic_inc(&ctrl_info->num_blocked_threads);
 387         wait_event(ctrl_info->block_requests_wait,
 388                 !pqi_ctrl_blocked(ctrl_info));
 389         atomic_dec(&ctrl_info->num_blocked_threads);
 390 }
 391
 392 #define PQI_QUIESCE_WARNING_TIMEOUT_SECS                10
 393
 394 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 395 {
 396         unsigned long start_jiffies;
 397         unsigned long warning_timeout;
 398         bool displayed_warning;
 399
 400         displayed_warning = false;
 401         start_jiffies = jiffies;
 402         warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
 403
 404         while (atomic_read(&ctrl_info->num_busy_threads) >
 405                 atomic_read(&ctrl_info->num_blocked_threads)) {
 406                 if (time_after(jiffies, warning_timeout)) {
 407                         dev_warn(&ctrl_info->pci_dev->dev,
 408                                 "waiting %u seconds for driver activity to quiesce\n",
 409                                 jiffies_to_msecs(jiffies - start_jiffies) / 1000);
 410                         displayed_warning = true;
 411                         warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * HZ) + jiffies;
 412                 }
 413                 usleep_range(1000, 2000);
 414         }
 415
 416         if (displayed_warning)
 417                 dev_warn(&ctrl_info->pci_dev->dev,
 418                         "driver activity quiesced after waiting for %u seconds\n",
 419                         jiffies_to_msecs(jiffies - start_jiffies) / 1000);
 420 }
 421
 422 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 423 {
 424         return device->device_offline;
 425 }
 426
 427 static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
 428 {
 429         mutex_lock(&ctrl_info->ofa_mutex);
 430 }
 431
 432 static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
 433 {
 434         mutex_unlock(&ctrl_info->ofa_mutex);
 435 }
 436
 437 static inline void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
 438 {
 439         mutex_lock(&ctrl_info->ofa_mutex);
 440         mutex_unlock(&ctrl_info->ofa_mutex);
 441 }
 442
 443 static inline bool pqi_ofa_in_progress(struct pqi_ctrl_info *ctrl_info)
 444 {
 445         return mutex_is_locked(&ctrl_info->ofa_mutex);
 446 }
 447
 448 static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
 449 {
 450         device->in_remove = true;
 451 }
 452
 453 static inline bool pqi_device_in_remove(struct pqi_scsi_dev *device)
 454 {
 455         return device->in_remove;
 456 }
 457
 458 static inline int pqi_event_type_to_event_index(unsigned int event_type)
 459 {
 460         int index;
 461
 462         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
 463                 if (event_type == pqi_supported_event_types[index])
 464                         return index;
 465
 466         return -1;
 467 }
 468
 469 static inline bool pqi_is_supported_event(unsigned int event_type)
 470 {
 471         return pqi_event_type_to_event_index(event_type) != -1;
 472 }
 473
 474 static inline void pqi_schedule_rescan_worker_with_delay(struct pqi_ctrl_info *ctrl_info,
 475         unsigned long delay)
 476 {
 477         if (pqi_ctrl_offline(ctrl_info))
 478                 return;
 479
 480         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 481 }
 482
 483 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 484 {
 485         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 486 }
 487
 488 #define PQI_RESCAN_WORK_DELAY   (10 * HZ)
 489
 490 static inline void pqi_schedule_rescan_worker_delayed(struct pqi_ctrl_info *ctrl_info)
 491 {
 492         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 493 }
 494
 495 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 496 {
 497         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 498 }
 499
 500 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 501 {
 502         if (!ctrl_info->heartbeat_counter)
 503                 return 0;
 504
 505         return readl(ctrl_info->heartbeat_counter);
 506 }
 507
 508 static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 509 {
 510         return readb(ctrl_info->soft_reset_status);
 511 }
 512
 513 static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 514 {
 515         u8 status;
 516
 517         status = pqi_read_soft_reset_status(ctrl_info);
 518         status &= ~PQI_SOFT_RESET_ABORT;
 519         writeb(status, ctrl_info->soft_reset_status);
 520 }
 521
 522 static inline bool pqi_is_io_high_priority(struct pqi_scsi_dev *device, struct scsi_cmnd *scmd)
 523 {
 524         bool io_high_prio;
 525         int priority_class;
 526
 527         io_high_prio = false;
 528
 529         if (device->ncq_prio_enable) {
 530                 priority_class =
 531                         IOPRIO_PRIO_CLASS(req_get_ioprio(scsi_cmd_to_rq(scmd)));
 532                 if (priority_class == IOPRIO_CLASS_RT) {
 533                         /* Set NCQ priority for read/write commands. */
 534                         switch (scmd->cmnd[0]) {
 535                         case WRITE_16:
 536                         case READ_16:
 537                         case WRITE_12:
 538                         case READ_12:
 539                         case WRITE_10:
 540                         case READ_10:
 541                         case WRITE_6:
 542                         case READ_6:
 543                                 io_high_prio = true;
 544                                 break;
 545                         }
 546                 }
 547         }
 548
 549         return io_high_prio;
 550 }
 551
 552 static int pqi_map_single(struct pci_dev *pci_dev,
 553         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 554         size_t buffer_length, enum dma_data_direction data_direction)
 555 {
 556         dma_addr_t bus_address;
 557
 558         if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
 559                 return 0;
 560
 561         bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
 562                 data_direction);
 563         if (dma_mapping_error(&pci_dev->dev, bus_address))
 564                 return -ENOMEM;
 565
 566         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 567         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 568         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 569
 570         return 0;
 571 }
 572
 573 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 574         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 575         enum dma_data_direction data_direction)
 576 {
 577         int i;
 578
 579         if (data_direction == DMA_NONE)
 580                 return;
 581
 582         for (i = 0; i < num_descriptors; i++)
 583                 dma_unmap_single(&pci_dev->dev,
 584                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 585                         get_unaligned_le32(&descriptors[i].length),
 586                         data_direction);
 587 }
 588
 589 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 590         struct pqi_raid_path_request *request, u8 cmd,
 591         u8 *scsi3addr, void *buffer, size_t buffer_length,
 592         u16 vpd_page, enum dma_data_direction *dir)
 593 {
 594         u8 *cdb;
 595         size_t cdb_length = buffer_length;
 596
 597         memset(request, 0, sizeof(*request));
 598
 599         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 600         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 601                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 602                 &request->header.iu_length);
 603         put_unaligned_le32(buffer_length, &request->buffer_length);
 604         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 605         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 606         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 607
 608         cdb = request->cdb;
 609
 610         switch (cmd) {
 611         case INQUIRY:
 612                 request->data_direction = SOP_READ_FLAG;
 613                 cdb[0] = INQUIRY;
 614                 if (vpd_page & VPD_PAGE) {
 615                         cdb[1] = 0x1;
 616                         cdb[2] = (u8)vpd_page;
 617                 }
 618                 cdb[4] = (u8)cdb_length;
 619                 break;
 620         case CISS_REPORT_LOG:
 621         case CISS_REPORT_PHYS:
 622                 request->data_direction = SOP_READ_FLAG;
 623                 cdb[0] = cmd;
 624                 if (cmd == CISS_REPORT_PHYS) {
 625                         if (ctrl_info->rpl_extended_format_4_5_supported)
 626                                 cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4;
 627                         else
 628                                 cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2;
 629                 } else {
 630                         cdb[1] = ctrl_info->ciss_report_log_flags;
 631                 }
 632                 put_unaligned_be32(cdb_length, &cdb[6]);
 633                 break;
 634         case CISS_GET_RAID_MAP:
 635                 request->data_direction = SOP_READ_FLAG;
 636                 cdb[0] = CISS_READ;
 637                 cdb[1] = CISS_GET_RAID_MAP;
 638                 put_unaligned_be32(cdb_length, &cdb[6]);
 639                 break;
 640         case SA_FLUSH_CACHE:
 641                 request->header.driver_flags = PQI_DRIVER_NONBLOCKABLE_REQUEST;
 642                 request->data_direction = SOP_WRITE_FLAG;
 643                 cdb[0] = BMIC_WRITE;
 644                 cdb[6] = BMIC_FLUSH_CACHE;
 645                 put_unaligned_be16(cdb_length, &cdb[7]);
 646                 break;
 647         case BMIC_SENSE_DIAG_OPTIONS:
 648                 cdb_length = 0;
 649                 fallthrough;
 650         case BMIC_IDENTIFY_CONTROLLER:
 651         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 652         case BMIC_SENSE_SUBSYSTEM_INFORMATION:
 653         case BMIC_SENSE_FEATURE:
 654                 request->data_direction = SOP_READ_FLAG;
 655                 cdb[0] = BMIC_READ;
 656                 cdb[6] = cmd;
 657                 put_unaligned_be16(cdb_length, &cdb[7]);
 658                 break;
 659         case BMIC_SET_DIAG_OPTIONS:
 660                 cdb_length = 0;
 661                 fallthrough;
 662         case BMIC_WRITE_HOST_WELLNESS:
 663                 request->data_direction = SOP_WRITE_FLAG;
 664                 cdb[0] = BMIC_WRITE;
 665                 cdb[6] = cmd;
 666                 put_unaligned_be16(cdb_length, &cdb[7]);
 667                 break;
 668         case BMIC_CSMI_PASSTHRU:
 669                 request->data_direction = SOP_BIDIRECTIONAL;
 670                 cdb[0] = BMIC_WRITE;
 671                 cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
 672                 cdb[6] = cmd;
 673                 put_unaligned_be16(cdb_length, &cdb[7]);
 674                 break;
 675         default:
 676                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n", cmd);
 677                 break;
 678         }
 679
 680         switch (request->data_direction) {
 681         case SOP_READ_FLAG:
 682                 *dir = DMA_FROM_DEVICE;
 683                 break;
 684         case SOP_WRITE_FLAG:
 685                 *dir = DMA_TO_DEVICE;
 686                 break;
 687         case SOP_NO_DIRECTION_FLAG:
 688                 *dir = DMA_NONE;
 689                 break;
 690         default:
 691                 *dir = DMA_BIDIRECTIONAL;
 692                 break;
 693         }
 694
 695         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 696                 buffer, buffer_length, *dir);
 697 }
 698
 699 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 700 {
 701         io_request->scmd = NULL;
 702         io_request->status = 0;
 703         io_request->error_info = NULL;
 704         io_request->raid_bypass = false;
 705 }
 706
 707 static inline struct pqi_io_request *pqi_alloc_io_request(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
 708 {
 709         struct pqi_io_request *io_request;
 710         u16 i;
 711
 712         if (scmd) { /* SML I/O request */
 713                 u32 blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
 714
 715                 i = blk_mq_unique_tag_to_tag(blk_tag);
 716                 io_request = &ctrl_info->io_request_pool[i];
 717                 if (atomic_inc_return(&io_request->refcount) > 1) {
 718                         atomic_dec(&io_request->refcount);
 719                         return NULL;
 720                 }
 721         } else { /* IOCTL or driver internal request */
 722                 /*
 723                  * benignly racy - may have to wait for an open slot.
 724                  * command slot range is scsi_ml_can_queue -
 725                  *         [scsi_ml_can_queue + (PQI_RESERVED_IO_SLOTS - 1)]
 726                  */
 727                 i = 0;
 728                 while (1) {
 729                         io_request = &ctrl_info->io_request_pool[ctrl_info->scsi_ml_can_queue + i];
 730                         if (atomic_inc_return(&io_request->refcount) == 1)
 731                                 break;
 732                         atomic_dec(&io_request->refcount);
 733                         i = (i + 1) % PQI_RESERVED_IO_SLOTS;
 734                 }
 735         }
 736
 737         if (io_request)
 738                 pqi_reinit_io_request(io_request);
 739
 740         return io_request;
 741 }
 742
 743 static void pqi_free_io_request(struct pqi_io_request *io_request)
 744 {
 745         atomic_dec(&io_request->refcount);
 746 }
 747
 748 static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 749         u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
 750         struct pqi_raid_error_info *error_info)
 751 {
 752         int rc;
 753         struct pqi_raid_path_request request;
 754         enum dma_data_direction dir;
 755
 756         rc = pqi_build_raid_path_request(ctrl_info, &request, cmd, scsi3addr,
 757                 buffer, buffer_length, vpd_page, &dir);
 758         if (rc)
 759                 return rc;
 760
 761         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, error_info);
 762
 763         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 764
 765         return rc;
 766 }
 767
 768 /* helper functions for pqi_send_scsi_raid_request */
 769
 770 static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
 771         u8 cmd, void *buffer, size_t buffer_length)
 772 {
 773         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 774                 buffer, buffer_length, 0, NULL);
 775 }
 776
 777 static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
 778         u8 cmd, void *buffer, size_t buffer_length,
 779         struct pqi_raid_error_info *error_info)
 780 {
 781         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 782                 buffer, buffer_length, 0, error_info);
 783 }
 784
 785 static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 786         struct bmic_identify_controller *buffer)
 787 {
 788         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
 789                 buffer, sizeof(*buffer));
 790 }
 791
 792 static inline int pqi_sense_subsystem_info(struct  pqi_ctrl_info *ctrl_info,
 793         struct bmic_sense_subsystem_info *sense_info)
 794 {
 795         return pqi_send_ctrl_raid_request(ctrl_info,
 796                 BMIC_SENSE_SUBSYSTEM_INFORMATION, sense_info,
 797                 sizeof(*sense_info));
 798 }
 799
 800 static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 801         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 802 {
 803         return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
 804                 buffer, buffer_length, vpd_page, NULL);
 805 }
 806
 807 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 808         struct pqi_scsi_dev *device,
 809         struct bmic_identify_physical_device *buffer, size_t buffer_length)
 810 {
 811         int rc;
 812         enum dma_data_direction dir;
 813         u16 bmic_device_index;
 814         struct pqi_raid_path_request request;
 815
 816         rc = pqi_build_raid_path_request(ctrl_info, &request,
 817                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 818                 buffer_length, 0, &dir);
 819         if (rc)
 820                 return rc;
 821
 822         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 823         request.cdb[2] = (u8)bmic_device_index;
 824         request.cdb[9] = (u8)(bmic_device_index >> 8);
 825
 826         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
 827
 828         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 829
 830         return rc;
 831 }
 832
 833 static inline u32 pqi_aio_limit_to_bytes(__le16 *limit)
 834 {
 835         u32 bytes;
 836
 837         bytes = get_unaligned_le16(limit);
 838         if (bytes == 0)
 839                 bytes = ~0;
 840         else
 841                 bytes *= 1024;
 842
 843         return bytes;
 844 }
 845
 846 #pragma pack(1)
 847
 848 struct bmic_sense_feature_buffer {
 849         struct bmic_sense_feature_buffer_header header;
 850         struct bmic_sense_feature_io_page_aio_subpage aio_subpage;
 851 };
 852
 853 #pragma pack()
 854
 855 #define MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH       \
 856         offsetofend(struct bmic_sense_feature_buffer, \
 857                 aio_subpage.max_write_raid_1_10_3drive)
 858
 859 #define MINIMUM_AIO_SUBPAGE_LENGTH      \
 860         (offsetofend(struct bmic_sense_feature_io_page_aio_subpage, \
 861                 max_write_raid_1_10_3drive) - \
 862                 sizeof_field(struct bmic_sense_feature_io_page_aio_subpage, header))
 863
 864 static int pqi_get_advanced_raid_bypass_config(struct pqi_ctrl_info *ctrl_info)
 865 {
 866         int rc;
 867         enum dma_data_direction dir;
 868         struct pqi_raid_path_request request;
 869         struct bmic_sense_feature_buffer *buffer;
 870
 871         buffer = kmalloc(sizeof(*buffer), GFP_KERNEL);
 872         if (!buffer)
 873                 return -ENOMEM;
 874
 875         rc = pqi_build_raid_path_request(ctrl_info, &request, BMIC_SENSE_FEATURE, RAID_CTLR_LUNID,
 876                 buffer, sizeof(*buffer), 0, &dir);
 877         if (rc)
 878                 goto error;
 879
 880         request.cdb[2] = BMIC_SENSE_FEATURE_IO_PAGE;
 881         request.cdb[3] = BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE;
 882
 883         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
 884
 885         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 886
 887         if (rc)
 888                 goto error;
 889
 890         if (buffer->header.page_code != BMIC_SENSE_FEATURE_IO_PAGE ||
 891                 buffer->header.subpage_code !=
 892                         BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
 893                 get_unaligned_le16(&buffer->header.buffer_length) <
 894                         MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH ||
 895                 buffer->aio_subpage.header.page_code !=
 896                         BMIC_SENSE_FEATURE_IO_PAGE ||
 897                 buffer->aio_subpage.header.subpage_code !=
 898                         BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
 899                 get_unaligned_le16(&buffer->aio_subpage.header.page_length) <
 900                         MINIMUM_AIO_SUBPAGE_LENGTH) {
 901                 goto error;
 902         }
 903
 904         ctrl_info->max_transfer_encrypted_sas_sata =
 905                 pqi_aio_limit_to_bytes(
 906                         &buffer->aio_subpage.max_transfer_encrypted_sas_sata);
 907
 908         ctrl_info->max_transfer_encrypted_nvme =
 909                 pqi_aio_limit_to_bytes(
 910                         &buffer->aio_subpage.max_transfer_encrypted_nvme);
 911
 912         ctrl_info->max_write_raid_5_6 =
 913                 pqi_aio_limit_to_bytes(
 914                         &buffer->aio_subpage.max_write_raid_5_6);
 915
 916         ctrl_info->max_write_raid_1_10_2drive =
 917                 pqi_aio_limit_to_bytes(
 918                         &buffer->aio_subpage.max_write_raid_1_10_2drive);
 919
 920         ctrl_info->max_write_raid_1_10_3drive =
 921                 pqi_aio_limit_to_bytes(
 922                         &buffer->aio_subpage.max_write_raid_1_10_3drive);
 923
 924 error:
 925         kfree(buffer);
 926
 927         return rc;
 928 }
 929
 930 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 931         enum bmic_flush_cache_shutdown_event shutdown_event)
 932 {
 933         int rc;
 934         struct bmic_flush_cache *flush_cache;
 935
 936         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 937         if (!flush_cache)
 938                 return -ENOMEM;
 939
 940         flush_cache->shutdown_event = shutdown_event;
 941
 942         rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
 943                 sizeof(*flush_cache));
 944
 945         kfree(flush_cache);
 946
 947         return rc;
 948 }
 949
 950 int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
 951         struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
 952         struct pqi_raid_error_info *error_info)
 953 {
 954         return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
 955                 buffer, buffer_length, error_info);
 956 }
 957
 958 #define PQI_FETCH_PTRAID_DATA           (1 << 31)
 959
 960 static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
 961 {
 962         int rc;
 963         struct bmic_diag_options *diag;
 964
 965         diag = kzalloc(sizeof(*diag), GFP_KERNEL);
 966         if (!diag)
 967                 return -ENOMEM;
 968
 969         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
 970                 diag, sizeof(*diag));
 971         if (rc)
 972                 goto out;
 973
 974         diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
 975
 976         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS, diag,
 977                 sizeof(*diag));
 978
 979 out:
 980         kfree(diag);
 981
 982         return rc;
 983 }
 984
 985 static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 986         void *buffer, size_t buffer_length)
 987 {
 988         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
 989                 buffer, buffer_length);
 990 }
 991
 992 #pragma pack(1)
 993
 994 struct bmic_host_wellness_driver_version {
 995         u8      start_tag[4];
 996         u8      driver_version_tag[2];
 997         __le16  driver_version_length;
 998         char    driver_version[32];
 999         u8      dont_write_tag[2];
1000         u8      end_tag[2];
1001 };
1002
1003 #pragma pack()
1004
1005 static int pqi_write_driver_version_to_host_wellness(
1006         struct pqi_ctrl_info *ctrl_info)
1007 {
1008         int rc;
1009         struct bmic_host_wellness_driver_version *buffer;
1010         size_t buffer_length;
1011
1012         buffer_length = sizeof(*buffer);
1013
1014         buffer = kmalloc(buffer_length, GFP_KERNEL);
1015         if (!buffer)
1016                 return -ENOMEM;
1017
1018         buffer->start_tag[0] = '<';
1019         buffer->start_tag[1] = 'H';
1020         buffer->start_tag[2] = 'W';
1021         buffer->start_tag[3] = '>';
1022         buffer->driver_version_tag[0] = 'D';
1023         buffer->driver_version_tag[1] = 'V';
1024         put_unaligned_le16(sizeof(buffer->driver_version),
1025                 &buffer->driver_version_length);
1026         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
1027                 sizeof(buffer->driver_version) - 1);
1028         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
1029         buffer->dont_write_tag[0] = 'D';
1030         buffer->dont_write_tag[1] = 'W';
1031         buffer->end_tag[0] = 'Z';
1032         buffer->end_tag[1] = 'Z';
1033
1034         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
1035
1036         kfree(buffer);
1037
1038         return rc;
1039 }
1040
1041 #pragma pack(1)
1042
1043 struct bmic_host_wellness_time {
1044         u8      start_tag[4];
1045         u8      time_tag[2];
1046         __le16  time_length;
1047         u8      time[8];
1048         u8      dont_write_tag[2];
1049         u8      end_tag[2];
1050 };
1051
1052 #pragma pack()
1053
1054 static int pqi_write_current_time_to_host_wellness(
1055         struct pqi_ctrl_info *ctrl_info)
1056 {
1057         int rc;
1058         struct bmic_host_wellness_time *buffer;
1059         size_t buffer_length;
1060         time64_t local_time;
1061         unsigned int year;
1062         struct tm tm;
1063
1064         buffer_length = sizeof(*buffer);
1065
1066         buffer = kmalloc(buffer_length, GFP_KERNEL);
1067         if (!buffer)
1068                 return -ENOMEM;
1069
1070         buffer->start_tag[0] = '<';
1071         buffer->start_tag[1] = 'H';
1072         buffer->start_tag[2] = 'W';
1073         buffer->start_tag[3] = '>';
1074         buffer->time_tag[0] = 'T';
1075         buffer->time_tag[1] = 'D';
1076         put_unaligned_le16(sizeof(buffer->time),
1077                 &buffer->time_length);
1078
1079         local_time = ktime_get_real_seconds();
1080         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
1081         year = tm.tm_year + 1900;
1082
1083         buffer->time[0] = bin2bcd(tm.tm_hour);
1084         buffer->time[1] = bin2bcd(tm.tm_min);
1085         buffer->time[2] = bin2bcd(tm.tm_sec);
1086         buffer->time[3] = 0;
1087         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
1088         buffer->time[5] = bin2bcd(tm.tm_mday);
1089         buffer->time[6] = bin2bcd(year / 100);
1090         buffer->time[7] = bin2bcd(year % 100);
1091
1092         buffer->dont_write_tag[0] = 'D';
1093         buffer->dont_write_tag[1] = 'W';
1094         buffer->end_tag[0] = 'Z';
1095         buffer->end_tag[1] = 'Z';
1096
1097         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
1098
1099         kfree(buffer);
1100
1101         return rc;
1102 }
1103
1104 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * HZ)
1105
1106 static void pqi_update_time_worker(struct work_struct *work)
1107 {
1108         int rc;
1109         struct pqi_ctrl_info *ctrl_info;
1110
1111         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1112                 update_time_work);
1113
1114         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
1115         if (rc)
1116                 dev_warn(&ctrl_info->pci_dev->dev,
1117                         "error updating time on controller\n");
1118
1119         schedule_delayed_work(&ctrl_info->update_time_work,
1120                 PQI_UPDATE_TIME_WORK_INTERVAL);
1121 }
1122
1123 static inline void pqi_schedule_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1124 {
1125         schedule_delayed_work(&ctrl_info->update_time_work, 0);
1126 }
1127
1128 static inline void pqi_cancel_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1129 {
1130         cancel_delayed_work_sync(&ctrl_info->update_time_work);
1131 }
1132
1133 static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void *buffer,
1134         size_t buffer_length)
1135 {
1136         return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer, buffer_length);
1137 }
1138
1139 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void **buffer)
1140 {
1141         int rc;
1142         size_t lun_list_length;
1143         size_t lun_data_length;
1144         size_t new_lun_list_length;
1145         void *lun_data = NULL;
1146         struct report_lun_header *report_lun_header;
1147
1148         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
1149         if (!report_lun_header) {
1150                 rc = -ENOMEM;
1151                 goto out;
1152         }
1153
1154         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header, sizeof(*report_lun_header));
1155         if (rc)
1156                 goto out;
1157
1158         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
1159
1160 again:
1161         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
1162
1163         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
1164         if (!lun_data) {
1165                 rc = -ENOMEM;
1166                 goto out;
1167         }
1168
1169         if (lun_list_length == 0) {
1170                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
1171                 goto out;
1172         }
1173
1174         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
1175         if (rc)
1176                 goto out;
1177
1178         new_lun_list_length =
1179                 get_unaligned_be32(&((struct report_lun_header *)lun_data)->list_length);
1180
1181         if (new_lun_list_length > lun_list_length) {
1182                 lun_list_length = new_lun_list_length;
1183                 kfree(lun_data);
1184                 goto again;
1185         }
1186
1187 out:
1188         kfree(report_lun_header);
1189
1190         if (rc) {
1191                 kfree(lun_data);
1192                 lun_data = NULL;
1193         }
1194
1195         *buffer = lun_data;
1196
1197         return rc;
1198 }
1199
1200 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1201 {
1202         int rc;
1203         unsigned int i;
1204         u8 rpl_response_format;
1205         u32 num_physicals;
1206         size_t rpl_16byte_wwid_list_length;
1207         void *rpl_list;
1208         struct report_lun_header *rpl_header;
1209         struct report_phys_lun_8byte_wwid_list *rpl_8byte_wwid_list;
1210         struct report_phys_lun_16byte_wwid_list *rpl_16byte_wwid_list;
1211
1212         rc = pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS, &rpl_list);
1213         if (rc)
1214                 return rc;
1215
1216         if (ctrl_info->rpl_extended_format_4_5_supported) {
1217                 rpl_header = rpl_list;
1218                 rpl_response_format = rpl_header->flags & CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_MASK;
1219                 if (rpl_response_format == CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4) {
1220                         *buffer = rpl_list;
1221                         return 0;
1222                 } else if (rpl_response_format != CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2) {
1223                         dev_err(&ctrl_info->pci_dev->dev,
1224                                 "RPL returned unsupported data format %u\n",
1225                                 rpl_response_format);
1226                         return -EINVAL;
1227                 } else {
1228                         dev_warn(&ctrl_info->pci_dev->dev,
1229                                 "RPL returned extended format 2 instead of 4\n");
1230                 }
1231         }
1232
1233         rpl_8byte_wwid_list = rpl_list;
1234         num_physicals = get_unaligned_be32(&rpl_8byte_wwid_list->header.list_length) / sizeof(rpl_8byte_wwid_list->lun_entries[0]);
1235         rpl_16byte_wwid_list_length = sizeof(struct report_lun_header) + (num_physicals * sizeof(struct report_phys_lun_16byte_wwid));
1236
1237         rpl_16byte_wwid_list = kmalloc(rpl_16byte_wwid_list_length, GFP_KERNEL);
1238         if (!rpl_16byte_wwid_list)
1239                 return -ENOMEM;
1240
1241         put_unaligned_be32(num_physicals * sizeof(struct report_phys_lun_16byte_wwid),
1242                 &rpl_16byte_wwid_list->header.list_length);
1243         rpl_16byte_wwid_list->header.flags = rpl_8byte_wwid_list->header.flags;
1244
1245         for (i = 0; i < num_physicals; i++) {
1246                 memcpy(&rpl_16byte_wwid_list->lun_entries[i].lunid, &rpl_8byte_wwid_list->lun_entries[i].lunid, sizeof(rpl_8byte_wwid_list->lun_entries[i].lunid));
1247                 memcpy(&rpl_16byte_wwid_list->lun_entries[i].wwid[0], &rpl_8byte_wwid_list->lun_entries[i].wwid, sizeof(rpl_8byte_wwid_list->lun_entries[i].wwid));
1248                 memset(&rpl_16byte_wwid_list->lun_entries[i].wwid[8], 0, 8);
1249                 rpl_16byte_wwid_list->lun_entries[i].device_type = rpl_8byte_wwid_list->lun_entries[i].device_type;
1250                 rpl_16byte_wwid_list->lun_entries[i].device_flags = rpl_8byte_wwid_list->lun_entries[i].device_flags;
1251                 rpl_16byte_wwid_list->lun_entries[i].lun_count = rpl_8byte_wwid_list->lun_entries[i].lun_count;
1252                 rpl_16byte_wwid_list->lun_entries[i].redundant_paths = rpl_8byte_wwid_list->lun_entries[i].redundant_paths;
1253                 rpl_16byte_wwid_list->lun_entries[i].aio_handle = rpl_8byte_wwid_list->lun_entries[i].aio_handle;
1254         }
1255
1256         kfree(rpl_8byte_wwid_list);
1257         *buffer = rpl_16byte_wwid_list;
1258
1259         return 0;
1260 }
1261
1262 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1263 {
1264         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
1265 }
1266
1267 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
1268         struct report_phys_lun_16byte_wwid_list **physdev_list,
1269         struct report_log_lun_list **logdev_list)
1270 {
1271         int rc;
1272         size_t logdev_list_length;
1273         size_t logdev_data_length;
1274         struct report_log_lun_list *internal_logdev_list;
1275         struct report_log_lun_list *logdev_data;
1276         struct report_lun_header report_lun_header;
1277
1278         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
1279         if (rc)
1280                 dev_err(&ctrl_info->pci_dev->dev,
1281                         "report physical LUNs failed\n");
1282
1283         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
1284         if (rc)
1285                 dev_err(&ctrl_info->pci_dev->dev,
1286                         "report logical LUNs failed\n");
1287
1288         /*
1289          * Tack the controller itself onto the end of the logical device list
1290          * by adding a list entry that is all zeros.
1291          */
1292
1293         logdev_data = *logdev_list;
1294
1295         if (logdev_data) {
1296                 logdev_list_length =
1297                         get_unaligned_be32(&logdev_data->header.list_length);
1298         } else {
1299                 memset(&report_lun_header, 0, sizeof(report_lun_header));
1300                 logdev_data =
1301                         (struct report_log_lun_list *)&report_lun_header;
1302                 logdev_list_length = 0;
1303         }
1304
1305         logdev_data_length = sizeof(struct report_lun_header) +
1306                 logdev_list_length;
1307
1308         internal_logdev_list = kmalloc(logdev_data_length +
1309                 sizeof(struct report_log_lun), GFP_KERNEL);
1310         if (!internal_logdev_list) {
1311                 kfree(*logdev_list);
1312                 *logdev_list = NULL;
1313                 return -ENOMEM;
1314         }
1315
1316         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
1317         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
1318                 sizeof(struct report_log_lun));
1319         put_unaligned_be32(logdev_list_length +
1320                 sizeof(struct report_log_lun),
1321                 &internal_logdev_list->header.list_length);
1322
1323         kfree(*logdev_list);
1324         *logdev_list = internal_logdev_list;
1325
1326         return 0;
1327 }
1328
1329 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
1330         int bus, int target, int lun)
1331 {
1332         device->bus = bus;
1333         device->target = target;
1334         device->lun = lun;
1335 }
1336
1337 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
1338 {
1339         u8 *scsi3addr;
1340         u32 lunid;
1341         int bus;
1342         int target;
1343         int lun;
1344
1345         scsi3addr = device->scsi3addr;
1346         lunid = get_unaligned_le32(scsi3addr);
1347
1348         if (pqi_is_hba_lunid(scsi3addr)) {
1349                 /* The specified device is the controller. */
1350                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
1351                 device->target_lun_valid = true;
1352                 return;
1353         }
1354
1355         if (pqi_is_logical_device(device)) {
1356                 if (device->is_external_raid_device) {
1357                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
1358                         target = (lunid >> 16) & 0x3fff;
1359                         lun = lunid & 0xff;
1360                 } else {
1361                         bus = PQI_RAID_VOLUME_BUS;
1362                         target = 0;
1363                         lun = lunid & 0x3fff;
1364                 }
1365                 pqi_set_bus_target_lun(device, bus, target, lun);
1366                 device->target_lun_valid = true;
1367                 return;
1368         }
1369
1370         /*
1371          * Defer target and LUN assignment for non-controller physical devices
1372          * because the SAS transport layer will make these assignments later.
1373          */
1374         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
1375 }
1376
1377 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1378         struct pqi_scsi_dev *device)
1379 {
1380         int rc;
1381         u8 raid_level;
1382         u8 *buffer;
1383
1384         raid_level = SA_RAID_UNKNOWN;
1385
1386         buffer = kmalloc(64, GFP_KERNEL);
1387         if (buffer) {
1388                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1389                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1390                 if (rc == 0) {
1391                         raid_level = buffer[8];
1392                         if (raid_level > SA_RAID_MAX)
1393                                 raid_level = SA_RAID_UNKNOWN;
1394                 }
1395                 kfree(buffer);
1396         }
1397
1398         device->raid_level = raid_level;
1399 }
1400
1401 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1402         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1403 {
1404         char *err_msg;
1405         u32 raid_map_size;
1406         u32 r5or6_blocks_per_row;
1407
1408         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1409
1410         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1411                 err_msg = "RAID map too small";
1412                 goto bad_raid_map;
1413         }
1414
1415         if (device->raid_level == SA_RAID_1) {
1416                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1417                         err_msg = "invalid RAID-1 map";
1418                         goto bad_raid_map;
1419                 }
1420         } else if (device->raid_level == SA_RAID_TRIPLE) {
1421                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1422                         err_msg = "invalid RAID-1(Triple) map";
1423                         goto bad_raid_map;
1424                 }
1425         } else if ((device->raid_level == SA_RAID_5 ||
1426                 device->raid_level == SA_RAID_6) &&
1427                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1428                 /* RAID 50/60 */
1429                 r5or6_blocks_per_row =
1430                         get_unaligned_le16(&raid_map->strip_size) *
1431                         get_unaligned_le16(&raid_map->data_disks_per_row);
1432                 if (r5or6_blocks_per_row == 0) {
1433                         err_msg = "invalid RAID-5 or RAID-6 map";
1434                         goto bad_raid_map;
1435                 }
1436         }
1437
1438         return 0;
1439
1440 bad_raid_map:
1441         dev_warn(&ctrl_info->pci_dev->dev,
1442                 "logical device %08x%08x %s\n",
1443                 *((u32 *)&device->scsi3addr),
1444                 *((u32 *)&device->scsi3addr[4]), err_msg);
1445
1446         return -EINVAL;
1447 }
1448
1449 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1450         struct pqi_scsi_dev *device)
1451 {
1452         int rc;
1453         u32 raid_map_size;
1454         struct raid_map *raid_map;
1455
1456         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1457         if (!raid_map)
1458                 return -ENOMEM;
1459
1460         rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1461                 device->scsi3addr, raid_map, sizeof(*raid_map), 0, NULL);
1462         if (rc)
1463                 goto error;
1464
1465         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1466
1467         if (raid_map_size > sizeof(*raid_map)) {
1468
1469                 kfree(raid_map);
1470
1471                 raid_map = kmalloc(raid_map_size, GFP_KERNEL);
1472                 if (!raid_map)
1473                         return -ENOMEM;
1474
1475                 rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1476                         device->scsi3addr, raid_map, raid_map_size, 0, NULL);
1477                 if (rc)
1478                         goto error;
1479
1480                 if (get_unaligned_le32(&raid_map->structure_size)
1481                         != raid_map_size) {
1482                         dev_warn(&ctrl_info->pci_dev->dev,
1483                                 "requested %u bytes, received %u bytes\n",
1484                                 raid_map_size,
1485                                 get_unaligned_le32(&raid_map->structure_size));
1486                         rc = -EINVAL;
1487                         goto error;
1488                 }
1489         }
1490
1491         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1492         if (rc)
1493                 goto error;
1494
1495         device->raid_map = raid_map;
1496
1497         return 0;
1498
1499 error:
1500         kfree(raid_map);
1501
1502         return rc;
1503 }
1504
1505 static void pqi_set_max_transfer_encrypted(struct pqi_ctrl_info *ctrl_info,
1506         struct pqi_scsi_dev *device)
1507 {
1508         if (!ctrl_info->lv_drive_type_mix_valid) {
1509                 device->max_transfer_encrypted = ~0;
1510                 return;
1511         }
1512
1513         switch (LV_GET_DRIVE_TYPE_MIX(device->scsi3addr)) {
1514         case LV_DRIVE_TYPE_MIX_SAS_HDD_ONLY:
1515         case LV_DRIVE_TYPE_MIX_SATA_HDD_ONLY:
1516         case LV_DRIVE_TYPE_MIX_SAS_OR_SATA_SSD_ONLY:
1517         case LV_DRIVE_TYPE_MIX_SAS_SSD_ONLY:
1518         case LV_DRIVE_TYPE_MIX_SATA_SSD_ONLY:
1519         case LV_DRIVE_TYPE_MIX_SAS_ONLY:
1520         case LV_DRIVE_TYPE_MIX_SATA_ONLY:
1521                 device->max_transfer_encrypted =
1522                         ctrl_info->max_transfer_encrypted_sas_sata;
1523                 break;
1524         case LV_DRIVE_TYPE_MIX_NVME_ONLY:
1525                 device->max_transfer_encrypted =
1526                         ctrl_info->max_transfer_encrypted_nvme;
1527                 break;
1528         case LV_DRIVE_TYPE_MIX_UNKNOWN:
1529         case LV_DRIVE_TYPE_MIX_NO_RESTRICTION:
1530         default:
1531                 device->max_transfer_encrypted =
1532                         min(ctrl_info->max_transfer_encrypted_sas_sata,
1533                                 ctrl_info->max_transfer_encrypted_nvme);
1534                 break;
1535         }
1536 }
1537
1538 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1539         struct pqi_scsi_dev *device)
1540 {
1541         int rc;
1542         u8 *buffer;
1543         u8 bypass_status;
1544
1545         buffer = kmalloc(64, GFP_KERNEL);
1546         if (!buffer)
1547                 return;
1548
1549         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1550                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1551         if (rc)
1552                 goto out;
1553
1554 #define RAID_BYPASS_STATUS              4
1555 #define RAID_BYPASS_CONFIGURED          0x1
1556 #define RAID_BYPASS_ENABLED             0x2
1557
1558         bypass_status = buffer[RAID_BYPASS_STATUS];
1559         device->raid_bypass_configured =
1560                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1561         if (device->raid_bypass_configured &&
1562                 (bypass_status & RAID_BYPASS_ENABLED) &&
1563                 pqi_get_raid_map(ctrl_info, device) == 0) {
1564                 device->raid_bypass_enabled = true;
1565                 if (get_unaligned_le16(&device->raid_map->flags) &
1566                         RAID_MAP_ENCRYPTION_ENABLED)
1567                         pqi_set_max_transfer_encrypted(ctrl_info, device);
1568         }
1569
1570 out:
1571         kfree(buffer);
1572 }
1573
1574 /*
1575  * Use vendor-specific VPD to determine online/offline status of a volume.
1576  */
1577
1578 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1579         struct pqi_scsi_dev *device)
1580 {
1581         int rc;
1582         size_t page_length;
1583         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1584         bool volume_offline = true;
1585         u32 volume_flags;
1586         struct ciss_vpd_logical_volume_status *vpd;
1587
1588         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1589         if (!vpd)
1590                 goto no_buffer;
1591
1592         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1593                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1594         if (rc)
1595                 goto out;
1596
1597         if (vpd->page_code != CISS_VPD_LV_STATUS)
1598                 goto out;
1599
1600         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1601                 volume_status) + vpd->page_length;
1602         if (page_length < sizeof(*vpd))
1603                 goto out;
1604
1605         volume_status = vpd->volume_status;
1606         volume_flags = get_unaligned_be32(&vpd->flags);
1607         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1608
1609 out:
1610         kfree(vpd);
1611 no_buffer:
1612         device->volume_status = volume_status;
1613         device->volume_offline = volume_offline;
1614 }
1615
1616 #define PQI_DEVICE_NCQ_PRIO_SUPPORTED   0x01
1617 #define PQI_DEVICE_PHY_MAP_SUPPORTED    0x10
1618 #define PQI_DEVICE_ERASE_IN_PROGRESS    0x10
1619
1620 static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info,
1621         struct pqi_scsi_dev *device,
1622         struct bmic_identify_physical_device *id_phys)
1623 {
1624         int rc;
1625
1626         memset(id_phys, 0, sizeof(*id_phys));
1627
1628         rc = pqi_identify_physical_device(ctrl_info, device,
1629                 id_phys, sizeof(*id_phys));
1630         if (rc) {
1631                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1632                 return rc;
1633         }
1634
1635         scsi_sanitize_inquiry_string(&id_phys->model[0], 8);
1636         scsi_sanitize_inquiry_string(&id_phys->model[8], 16);
1637
1638         memcpy(device->vendor, &id_phys->model[0], sizeof(device->vendor));
1639         memcpy(device->model, &id_phys->model[8], sizeof(device->model));
1640
1641         device->box_index = id_phys->box_index;
1642         device->phys_box_on_bus = id_phys->phys_box_on_bus;
1643         device->phy_connected_dev_type = id_phys->phy_connected_dev_type[0];
1644         device->queue_depth =
1645                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1646         device->active_path_index = id_phys->active_path_number;
1647         device->path_map = id_phys->redundant_path_present_map;
1648         memcpy(&device->box,
1649                 &id_phys->alternate_paths_phys_box_on_port,
1650                 sizeof(device->box));
1651         memcpy(&device->phys_connector,
1652                 &id_phys->alternate_paths_phys_connector,
1653                 sizeof(device->phys_connector));
1654         device->bay = id_phys->phys_bay_in_box;
1655         device->lun_count = id_phys->multi_lun_device_lun_count;
1656         if ((id_phys->even_more_flags & PQI_DEVICE_PHY_MAP_SUPPORTED) &&
1657                 id_phys->phy_count)
1658                 device->phy_id =
1659                         id_phys->phy_to_phy_map[device->active_path_index];
1660         else
1661                 device->phy_id = 0xFF;
1662
1663         device->ncq_prio_support =
1664                 ((get_unaligned_le32(&id_phys->misc_drive_flags) >> 16) &
1665                 PQI_DEVICE_NCQ_PRIO_SUPPORTED);
1666
1667         device->erase_in_progress = !!(get_unaligned_le16(&id_phys->extra_physical_drive_flags) & PQI_DEVICE_ERASE_IN_PROGRESS);
1668
1669         return 0;
1670 }
1671
1672 static int pqi_get_logical_device_info(struct pqi_ctrl_info *ctrl_info,
1673         struct pqi_scsi_dev *device)
1674 {
1675         int rc;
1676         u8 *buffer;
1677
1678         buffer = kmalloc(64, GFP_KERNEL);
1679         if (!buffer)
1680                 return -ENOMEM;
1681
1682         /* Send an inquiry to the device to see what it is. */
1683         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1684         if (rc)
1685                 goto out;
1686
1687         scsi_sanitize_inquiry_string(&buffer[8], 8);
1688         scsi_sanitize_inquiry_string(&buffer[16], 16);
1689
1690         device->devtype = buffer[0] & 0x1f;
1691         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1692         memcpy(device->model, &buffer[16], sizeof(device->model));
1693
1694         if (device->devtype == TYPE_DISK) {
1695                 if (device->is_external_raid_device) {
1696                         device->raid_level = SA_RAID_UNKNOWN;
1697                         device->volume_status = CISS_LV_OK;
1698                         device->volume_offline = false;
1699                 } else {
1700                         pqi_get_raid_level(ctrl_info, device);
1701                         pqi_get_raid_bypass_status(ctrl_info, device);
1702                         pqi_get_volume_status(ctrl_info, device);
1703                 }
1704         }
1705
1706 out:
1707         kfree(buffer);
1708
1709         return rc;
1710 }
1711
1712 /*
1713  * Prevent adding drive to OS for some corner cases such as a drive
1714  * undergoing a sanitize (erase) operation. Some OSes will continue to poll
1715  * the drive until the sanitize completes, which can take hours,
1716  * resulting in long bootup delays. Commands such as TUR, READ_CAP
1717  * are allowed, but READ/WRITE cause check condition. So the OS
1718  * cannot check/read the partition table.
1719  * Note: devices that have completed sanitize must be re-enabled
1720  *       using the management utility.
1721  */
1722 static inline bool pqi_keep_device_offline(struct pqi_scsi_dev *device)
1723 {
1724         return device->erase_in_progress;
1725 }
1726
1727 static int pqi_get_device_info_phys_logical(struct pqi_ctrl_info *ctrl_info,
1728         struct pqi_scsi_dev *device,
1729         struct bmic_identify_physical_device *id_phys)
1730 {
1731         int rc;
1732
1733         if (device->is_expander_smp_device)
1734                 return 0;
1735
1736         if (pqi_is_logical_device(device))
1737                 rc = pqi_get_logical_device_info(ctrl_info, device);
1738         else
1739                 rc = pqi_get_physical_device_info(ctrl_info, device, id_phys);
1740
1741         return rc;
1742 }
1743
1744 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1745         struct pqi_scsi_dev *device,
1746         struct bmic_identify_physical_device *id_phys)
1747 {
1748         int rc;
1749
1750         rc = pqi_get_device_info_phys_logical(ctrl_info, device, id_phys);
1751
1752         if (rc == 0 && device->lun_count == 0)
1753                 device->lun_count = 1;
1754
1755         return rc;
1756 }
1757
1758 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1759         struct pqi_scsi_dev *device)
1760 {
1761         char *status;
1762         static const char unknown_state_str[] =
1763                 "Volume is in an unknown state (%u)";
1764         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1765
1766         switch (device->volume_status) {
1767         case CISS_LV_OK:
1768                 status = "Volume online";
1769                 break;
1770         case CISS_LV_FAILED:
1771                 status = "Volume failed";
1772                 break;
1773         case CISS_LV_NOT_CONFIGURED:
1774                 status = "Volume not configured";
1775                 break;
1776         case CISS_LV_DEGRADED:
1777                 status = "Volume degraded";
1778                 break;
1779         case CISS_LV_READY_FOR_RECOVERY:
1780                 status = "Volume ready for recovery operation";
1781                 break;
1782         case CISS_LV_UNDERGOING_RECOVERY:
1783                 status = "Volume undergoing recovery";
1784                 break;
1785         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1786                 status = "Wrong physical drive was replaced";
1787                 break;
1788         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1789                 status = "A physical drive not properly connected";
1790                 break;
1791         case CISS_LV_HARDWARE_OVERHEATING:
1792                 status = "Hardware is overheating";
1793                 break;
1794         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1795                 status = "Hardware has overheated";
1796                 break;
1797         case CISS_LV_UNDERGOING_EXPANSION:
1798                 status = "Volume undergoing expansion";
1799                 break;
1800         case CISS_LV_NOT_AVAILABLE:
1801                 status = "Volume waiting for transforming volume";
1802                 break;
1803         case CISS_LV_QUEUED_FOR_EXPANSION:
1804                 status = "Volume queued for expansion";
1805                 break;
1806         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1807                 status = "Volume disabled due to SCSI ID conflict";
1808                 break;
1809         case CISS_LV_EJECTED:
1810                 status = "Volume has been ejected";
1811                 break;
1812         case CISS_LV_UNDERGOING_ERASE:
1813                 status = "Volume undergoing background erase";
1814                 break;
1815         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1816                 status = "Volume ready for predictive spare rebuild";
1817                 break;
1818         case CISS_LV_UNDERGOING_RPI:
1819                 status = "Volume undergoing rapid parity initialization";
1820                 break;
1821         case CISS_LV_PENDING_RPI:
1822                 status = "Volume queued for rapid parity initialization";
1823                 break;
1824         case CISS_LV_ENCRYPTED_NO_KEY:
1825                 status = "Encrypted volume inaccessible - key not present";
1826                 break;
1827         case CISS_LV_UNDERGOING_ENCRYPTION:
1828                 status = "Volume undergoing encryption process";
1829                 break;
1830         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1831                 status = "Volume undergoing encryption re-keying process";
1832                 break;
1833         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1834                 status = "Volume encrypted but encryption is disabled";
1835                 break;
1836         case CISS_LV_PENDING_ENCRYPTION:
1837                 status = "Volume pending migration to encrypted state";
1838                 break;
1839         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1840                 status = "Volume pending encryption rekeying";
1841                 break;
1842         case CISS_LV_NOT_SUPPORTED:
1843                 status = "Volume not supported on this controller";
1844                 break;
1845         case CISS_LV_STATUS_UNAVAILABLE:
1846                 status = "Volume status not available";
1847                 break;
1848         default:
1849                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1850                         unknown_state_str, device->volume_status);
1851                 status = unknown_state_buffer;
1852                 break;
1853         }
1854
1855         dev_info(&ctrl_info->pci_dev->dev,
1856                 "scsi %d:%d:%d:%d %s\n",
1857                 ctrl_info->scsi_host->host_no,
1858                 device->bus, device->target, device->lun, status);
1859 }
1860
1861 static void pqi_rescan_worker(struct work_struct *work)
1862 {
1863         struct pqi_ctrl_info *ctrl_info;
1864
1865         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1866                 rescan_work);
1867
1868         pqi_scan_scsi_devices(ctrl_info);
1869 }
1870
1871 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1872         struct pqi_scsi_dev *device)
1873 {
1874         int rc;
1875
1876         if (pqi_is_logical_device(device))
1877                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1878                         device->target, device->lun);
1879         else
1880                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1881
1882         return rc;
1883 }
1884
1885 #define PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS      (20 * 1000)
1886
1887 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
1888 {
1889         int rc;
1890         int lun;
1891
1892         for (lun = 0; lun < device->lun_count; lun++) {
1893                 rc = pqi_device_wait_for_pending_io(ctrl_info, device, lun,
1894                         PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS);
1895                 if (rc)
1896                         dev_err(&ctrl_info->pci_dev->dev,
1897                                 "scsi %d:%d:%d:%d removing device with %d outstanding command(s)\n",
1898                                 ctrl_info->scsi_host->host_no, device->bus,
1899                                 device->target, lun,
1900                                 atomic_read(&device->scsi_cmds_outstanding[lun]));
1901         }
1902
1903         if (pqi_is_logical_device(device))
1904                 scsi_remove_device(device->sdev);
1905         else
1906                 pqi_remove_sas_device(device);
1907
1908         pqi_device_remove_start(device);
1909 }
1910
1911 /* Assumes the SCSI device list lock is held. */
1912
1913 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1914         int bus, int target, int lun)
1915 {
1916         struct pqi_scsi_dev *device;
1917
1918         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
1919                 if (device->bus == bus && device->target == target && device->lun == lun)
1920                         return device;
1921
1922         return NULL;
1923 }
1924
1925 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1, struct pqi_scsi_dev *dev2)
1926 {
1927         if (dev1->is_physical_device != dev2->is_physical_device)
1928                 return false;
1929
1930         if (dev1->is_physical_device)
1931                 return memcmp(dev1->wwid, dev2->wwid, sizeof(dev1->wwid)) == 0;
1932
1933         return memcmp(dev1->volume_id, dev2->volume_id, sizeof(dev1->volume_id)) == 0;
1934 }
1935
1936 enum pqi_find_result {
1937         DEVICE_NOT_FOUND,
1938         DEVICE_CHANGED,
1939         DEVICE_SAME,
1940 };
1941
1942 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1943         struct pqi_scsi_dev *device_to_find, struct pqi_scsi_dev **matching_device)
1944 {
1945         struct pqi_scsi_dev *device;
1946
1947         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
1948                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr, device->scsi3addr)) {
1949                         *matching_device = device;
1950                         if (pqi_device_equal(device_to_find, device)) {
1951                                 if (device_to_find->volume_offline)
1952                                         return DEVICE_CHANGED;
1953                                 return DEVICE_SAME;
1954                         }
1955                         return DEVICE_CHANGED;
1956                 }
1957         }
1958
1959         return DEVICE_NOT_FOUND;
1960 }
1961
1962 static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
1963 {
1964         if (device->is_expander_smp_device)
1965                 return "Enclosure SMP    ";
1966
1967         return scsi_device_type(device->devtype);
1968 }
1969
1970 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1971
1972 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1973         char *action, struct pqi_scsi_dev *device)
1974 {
1975         ssize_t count;
1976         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1977
1978         count = scnprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1979                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1980
1981         if (device->target_lun_valid)
1982                 count += scnprintf(buffer + count,
1983                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1984                         "%d:%d",
1985                         device->target,
1986                         device->lun);
1987         else
1988                 count += scnprintf(buffer + count,
1989                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1990                         "-:-");
1991
1992         if (pqi_is_logical_device(device))
1993                 count += scnprintf(buffer + count,
1994                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1995                         " %08x%08x",
1996                         *((u32 *)&device->scsi3addr),
1997                         *((u32 *)&device->scsi3addr[4]));
1998         else
1999                 count += scnprintf(buffer + count,
2000                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2001                         " %016llx%016llx",
2002                         get_unaligned_be64(&device->wwid[0]),
2003                         get_unaligned_be64(&device->wwid[8]));
2004
2005         count += scnprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
2006                 " %s %.8s %.16s ",
2007                 pqi_device_type(device),
2008                 device->vendor,
2009                 device->model);
2010
2011         if (pqi_is_logical_device(device)) {
2012                 if (device->devtype == TYPE_DISK)
2013                         count += scnprintf(buffer + count,
2014                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
2015                                 "SSDSmartPathCap%c En%c %-12s",
2016                                 device->raid_bypass_configured ? '+' : '-',
2017                                 device->raid_bypass_enabled ? '+' : '-',
2018                                 pqi_raid_level_to_string(device->raid_level));
2019         } else {
2020                 count += scnprintf(buffer + count,
2021                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2022                         "AIO%c", device->aio_enabled ? '+' : '-');
2023                 if (device->devtype == TYPE_DISK ||
2024                         device->devtype == TYPE_ZBC)
2025                         count += scnprintf(buffer + count,
2026                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
2027                                 " qd=%-6d", device->queue_depth);
2028         }
2029
2030         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
2031 }
2032
2033 static bool pqi_raid_maps_equal(struct raid_map *raid_map1, struct raid_map *raid_map2)
2034 {
2035         u32 raid_map1_size;
2036         u32 raid_map2_size;
2037
2038         if (raid_map1 == NULL || raid_map2 == NULL)
2039                 return raid_map1 == raid_map2;
2040
2041         raid_map1_size = get_unaligned_le32(&raid_map1->structure_size);
2042         raid_map2_size = get_unaligned_le32(&raid_map2->structure_size);
2043
2044         if (raid_map1_size != raid_map2_size)
2045                 return false;
2046
2047         return memcmp(raid_map1, raid_map2, raid_map1_size) == 0;
2048 }
2049
2050 /* Assumes the SCSI device list lock is held. */
2051
2052 static void pqi_scsi_update_device(struct pqi_ctrl_info *ctrl_info,
2053         struct pqi_scsi_dev *existing_device, struct pqi_scsi_dev *new_device)
2054 {
2055         existing_device->device_type = new_device->device_type;
2056         existing_device->bus = new_device->bus;
2057         if (new_device->target_lun_valid) {
2058                 existing_device->target = new_device->target;
2059                 existing_device->lun = new_device->lun;
2060                 existing_device->target_lun_valid = true;
2061         }
2062
2063         /* By definition, the scsi3addr and wwid fields are already the same. */
2064
2065         existing_device->is_physical_device = new_device->is_physical_device;
2066         memcpy(existing_device->vendor, new_device->vendor, sizeof(existing_device->vendor));
2067         memcpy(existing_device->model, new_device->model, sizeof(existing_device->model));
2068         existing_device->sas_address = new_device->sas_address;
2069         existing_device->queue_depth = new_device->queue_depth;
2070         existing_device->device_offline = false;
2071         existing_device->lun_count = new_device->lun_count;
2072
2073         if (pqi_is_logical_device(existing_device)) {
2074                 existing_device->is_external_raid_device = new_device->is_external_raid_device;
2075
2076                 if (existing_device->devtype == TYPE_DISK) {
2077                         existing_device->raid_level = new_device->raid_level;
2078                         existing_device->volume_status = new_device->volume_status;
2079                         if (ctrl_info->logical_volume_rescan_needed)
2080                                 existing_device->rescan = true;
2081                         memset(existing_device->next_bypass_group, 0, sizeof(existing_device->next_bypass_group));
2082                         if (!pqi_raid_maps_equal(existing_device->raid_map, new_device->raid_map)) {
2083                                 kfree(existing_device->raid_map);
2084                                 existing_device->raid_map = new_device->raid_map;
2085                                 /* To prevent this from being freed later. */
2086                                 new_device->raid_map = NULL;
2087                         }
2088                         existing_device->raid_bypass_configured = new_device->raid_bypass_configured;
2089                         existing_device->raid_bypass_enabled = new_device->raid_bypass_enabled;
2090                 }
2091         } else {
2092                 existing_device->aio_enabled = new_device->aio_enabled;
2093                 existing_device->aio_handle = new_device->aio_handle;
2094                 existing_device->is_expander_smp_device = new_device->is_expander_smp_device;
2095                 existing_device->active_path_index = new_device->active_path_index;
2096                 existing_device->phy_id = new_device->phy_id;
2097                 existing_device->path_map = new_device->path_map;
2098                 existing_device->bay = new_device->bay;
2099                 existing_device->box_index = new_device->box_index;
2100                 existing_device->phys_box_on_bus = new_device->phys_box_on_bus;
2101                 existing_device->phy_connected_dev_type = new_device->phy_connected_dev_type;
2102                 memcpy(existing_device->box, new_device->box, sizeof(existing_device->box));
2103                 memcpy(existing_device->phys_connector, new_device->phys_connector, sizeof(existing_device->phys_connector));
2104         }
2105 }
2106
2107 static inline void pqi_free_device(struct pqi_scsi_dev *device)
2108 {
2109         if (device) {
2110                 kfree(device->raid_map);
2111                 kfree(device);
2112         }
2113 }
2114
2115 /*
2116  * Called when exposing a new device to the OS fails in order to re-adjust
2117  * our internal SCSI device list to match the SCSI ML's view.
2118  */
2119
2120 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
2121         struct pqi_scsi_dev *device)
2122 {
2123         unsigned long flags;
2124
2125         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2126         list_del(&device->scsi_device_list_entry);
2127         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2128
2129         /* Allow the device structure to be freed later. */
2130         device->keep_device = false;
2131 }
2132
2133 static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
2134 {
2135         if (device->is_expander_smp_device)
2136                 return device->sas_port != NULL;
2137
2138         return device->sdev != NULL;
2139 }
2140
2141 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
2142         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
2143 {
2144         int rc;
2145         unsigned int i;
2146         unsigned long flags;
2147         enum pqi_find_result find_result;
2148         struct pqi_scsi_dev *device;
2149         struct pqi_scsi_dev *next;
2150         struct pqi_scsi_dev *matching_device;
2151         LIST_HEAD(add_list);
2152         LIST_HEAD(delete_list);
2153
2154         /*
2155          * The idea here is to do as little work as possible while holding the
2156          * spinlock.  That's why we go to great pains to defer anything other
2157          * than updating the internal device list until after we release the
2158          * spinlock.
2159          */
2160
2161         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2162
2163         /* Assume that all devices in the existing list have gone away. */
2164         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
2165                 device->device_gone = true;
2166
2167         for (i = 0; i < num_new_devices; i++) {
2168                 device = new_device_list[i];
2169
2170                 find_result = pqi_scsi_find_entry(ctrl_info, device,
2171                         &matching_device);
2172
2173                 switch (find_result) {
2174                 case DEVICE_SAME:
2175                         /*
2176                          * The newly found device is already in the existing
2177                          * device list.
2178                          */
2179                         device->new_device = false;
2180                         matching_device->device_gone = false;
2181                         pqi_scsi_update_device(ctrl_info, matching_device, device);
2182                         break;
2183                 case DEVICE_NOT_FOUND:
2184                         /*
2185                          * The newly found device is NOT in the existing device
2186                          * list.
2187                          */
2188                         device->new_device = true;
2189                         break;
2190                 case DEVICE_CHANGED:
2191                         /*
2192                          * The original device has gone away and we need to add
2193                          * the new device.
2194                          */
2195                         device->new_device = true;
2196                         break;
2197                 }
2198         }
2199
2200         /* Process all devices that have gone away. */
2201         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
2202                 scsi_device_list_entry) {
2203                 if (device->device_gone) {
2204                         list_del(&device->scsi_device_list_entry);
2205                         list_add_tail(&device->delete_list_entry, &delete_list);
2206                 }
2207         }
2208
2209         /* Process all new devices. */
2210         for (i = 0; i < num_new_devices; i++) {
2211                 device = new_device_list[i];
2212                 if (!device->new_device)
2213                         continue;
2214                 if (device->volume_offline)
2215                         continue;
2216                 list_add_tail(&device->scsi_device_list_entry,
2217                         &ctrl_info->scsi_device_list);
2218                 list_add_tail(&device->add_list_entry, &add_list);
2219                 /* To prevent this device structure from being freed later. */
2220                 device->keep_device = true;
2221         }
2222
2223         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2224
2225         /*
2226          * If OFA is in progress and there are devices that need to be deleted,
2227          * allow any pending reset operations to continue and unblock any SCSI
2228          * requests before removal.
2229          */
2230         if (pqi_ofa_in_progress(ctrl_info)) {
2231                 list_for_each_entry_safe(device, next, &delete_list, delete_list_entry)
2232                         if (pqi_is_device_added(device))
2233                                 pqi_device_remove_start(device);
2234                 pqi_ctrl_unblock_device_reset(ctrl_info);
2235                 pqi_scsi_unblock_requests(ctrl_info);
2236         }
2237
2238         /* Remove all devices that have gone away. */
2239         list_for_each_entry_safe(device, next, &delete_list, delete_list_entry) {
2240                 if (device->volume_offline) {
2241                         pqi_dev_info(ctrl_info, "offline", device);
2242                         pqi_show_volume_status(ctrl_info, device);
2243                 } else {
2244                         pqi_dev_info(ctrl_info, "removed", device);
2245                 }
2246                 if (pqi_is_device_added(device))
2247                         pqi_remove_device(ctrl_info, device);
2248                 list_del(&device->delete_list_entry);
2249                 pqi_free_device(device);
2250         }
2251
2252         /*
2253          * Notify the SML of any existing device changes such as;
2254          * queue depth, device size.
2255          */
2256         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
2257                 if (device->sdev && device->queue_depth != device->advertised_queue_depth) {
2258                         device->advertised_queue_depth = device->queue_depth;
2259                         scsi_change_queue_depth(device->sdev, device->advertised_queue_depth);
2260                         if (device->rescan) {
2261                                 scsi_rescan_device(&device->sdev->sdev_gendev);
2262                                 device->rescan = false;
2263                         }
2264                 }
2265         }
2266
2267         /* Expose any new devices. */
2268         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
2269                 if (!pqi_is_device_added(device)) {
2270                         rc = pqi_add_device(ctrl_info, device);
2271                         if (rc == 0) {
2272                                 pqi_dev_info(ctrl_info, "added", device);
2273                         } else {
2274                                 dev_warn(&ctrl_info->pci_dev->dev,
2275                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
2276                                         ctrl_info->scsi_host->host_no,
2277                                         device->bus, device->target,
2278                                         device->lun);
2279                                 pqi_fixup_botched_add(ctrl_info, device);
2280                         }
2281                 }
2282         }
2283
2284         ctrl_info->logical_volume_rescan_needed = false;
2285
2286 }
2287
2288 static inline bool pqi_is_supported_device(struct pqi_scsi_dev *device)
2289 {
2290         /*
2291          * Only support the HBA controller itself as a RAID
2292          * controller.  If it's a RAID controller other than
2293          * the HBA itself (an external RAID controller, for
2294          * example), we don't support it.
2295          */
2296         if (device->device_type == SA_DEVICE_TYPE_CONTROLLER &&
2297                 !pqi_is_hba_lunid(device->scsi3addr))
2298                         return false;
2299
2300         return true;
2301 }
2302
2303 static inline bool pqi_skip_device(u8 *scsi3addr)
2304 {
2305         /* Ignore all masked devices. */
2306         if (MASKED_DEVICE(scsi3addr))
2307                 return true;
2308
2309         return false;
2310 }
2311
2312 static inline void pqi_mask_device(u8 *scsi3addr)
2313 {
2314         scsi3addr[3] |= 0xc0;
2315 }
2316
2317 static inline bool pqi_is_multipath_device(struct pqi_scsi_dev *device)
2318 {
2319         if (pqi_is_logical_device(device))
2320                 return false;
2321
2322         return (device->path_map & (device->path_map - 1)) != 0;
2323 }
2324
2325 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
2326 {
2327         return !device->is_physical_device || !pqi_skip_device(device->scsi3addr);
2328 }
2329
2330 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2331 {
2332         int i;
2333         int rc;
2334         LIST_HEAD(new_device_list_head);
2335         struct report_phys_lun_16byte_wwid_list *physdev_list = NULL;
2336         struct report_log_lun_list *logdev_list = NULL;
2337         struct report_phys_lun_16byte_wwid *phys_lun;
2338         struct report_log_lun *log_lun;
2339         struct bmic_identify_physical_device *id_phys = NULL;
2340         u32 num_physicals;
2341         u32 num_logicals;
2342         struct pqi_scsi_dev **new_device_list = NULL;
2343         struct pqi_scsi_dev *device;
2344         struct pqi_scsi_dev *next;
2345         unsigned int num_new_devices;
2346         unsigned int num_valid_devices;
2347         bool is_physical_device;
2348         u8 *scsi3addr;
2349         unsigned int physical_index;
2350         unsigned int logical_index;
2351         static char *out_of_memory_msg =
2352                 "failed to allocate memory, device discovery stopped";
2353
2354         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
2355         if (rc)
2356                 goto out;
2357
2358         if (physdev_list)
2359                 num_physicals =
2360                         get_unaligned_be32(&physdev_list->header.list_length)
2361                                 / sizeof(physdev_list->lun_entries[0]);
2362         else
2363                 num_physicals = 0;
2364
2365         if (logdev_list)
2366                 num_logicals =
2367                         get_unaligned_be32(&logdev_list->header.list_length)
2368                                 / sizeof(logdev_list->lun_entries[0]);
2369         else
2370                 num_logicals = 0;
2371
2372         if (num_physicals) {
2373                 /*
2374                  * We need this buffer for calls to pqi_get_physical_disk_info()
2375                  * below.  We allocate it here instead of inside
2376                  * pqi_get_physical_disk_info() because it's a fairly large
2377                  * buffer.
2378                  */
2379                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
2380                 if (!id_phys) {
2381                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2382                                 out_of_memory_msg);
2383                         rc = -ENOMEM;
2384                         goto out;
2385                 }
2386
2387                 if (pqi_hide_vsep) {
2388                         for (i = num_physicals - 1; i >= 0; i--) {
2389                                 phys_lun = &physdev_list->lun_entries[i];
2390                                 if (CISS_GET_DRIVE_NUMBER(phys_lun->lunid) == PQI_VSEP_CISS_BTL) {
2391                                         pqi_mask_device(phys_lun->lunid);
2392                                         break;
2393                                 }
2394                         }
2395                 }
2396         }
2397
2398         if (num_logicals &&
2399                 (logdev_list->header.flags & CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX))
2400                 ctrl_info->lv_drive_type_mix_valid = true;
2401
2402         num_new_devices = num_physicals + num_logicals;
2403
2404         new_device_list = kmalloc_array(num_new_devices,
2405                                         sizeof(*new_device_list),
2406                                         GFP_KERNEL);
2407         if (!new_device_list) {
2408                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
2409                 rc = -ENOMEM;
2410                 goto out;
2411         }
2412
2413         for (i = 0; i < num_new_devices; i++) {
2414                 device = kzalloc(sizeof(*device), GFP_KERNEL);
2415                 if (!device) {
2416                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2417                                 out_of_memory_msg);
2418                         rc = -ENOMEM;
2419                         goto out;
2420                 }
2421                 list_add_tail(&device->new_device_list_entry,
2422                         &new_device_list_head);
2423         }
2424
2425         device = NULL;
2426         num_valid_devices = 0;
2427         physical_index = 0;
2428         logical_index = 0;
2429
2430         for (i = 0; i < num_new_devices; i++) {
2431
2432                 if ((!pqi_expose_ld_first && i < num_physicals) ||
2433                         (pqi_expose_ld_first && i >= num_logicals)) {
2434                         is_physical_device = true;
2435                         phys_lun = &physdev_list->lun_entries[physical_index++];
2436                         log_lun = NULL;
2437                         scsi3addr = phys_lun->lunid;
2438                 } else {
2439                         is_physical_device = false;
2440                         phys_lun = NULL;
2441                         log_lun = &logdev_list->lun_entries[logical_index++];
2442                         scsi3addr = log_lun->lunid;
2443                 }
2444
2445                 if (is_physical_device && pqi_skip_device(scsi3addr))
2446                         continue;
2447
2448                 if (device)
2449                         device = list_next_entry(device, new_device_list_entry);
2450                 else
2451                         device = list_first_entry(&new_device_list_head,
2452                                 struct pqi_scsi_dev, new_device_list_entry);
2453
2454                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
2455                 device->is_physical_device = is_physical_device;
2456                 if (is_physical_device) {
2457                         device->device_type = phys_lun->device_type;
2458                         if (device->device_type == SA_DEVICE_TYPE_EXPANDER_SMP)
2459                                 device->is_expander_smp_device = true;
2460                 } else {
2461                         device->is_external_raid_device =
2462                                 pqi_is_external_raid_addr(scsi3addr);
2463                 }
2464
2465                 if (!pqi_is_supported_device(device))
2466                         continue;
2467
2468                 /* Gather information about the device. */
2469                 rc = pqi_get_device_info(ctrl_info, device, id_phys);
2470                 if (rc == -ENOMEM) {
2471                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2472                                 out_of_memory_msg);
2473                         goto out;
2474                 }
2475                 if (rc) {
2476                         if (device->is_physical_device)
2477                                 dev_warn(&ctrl_info->pci_dev->dev,
2478                                         "obtaining device info failed, skipping physical device %016llx%016llx\n",
2479                                         get_unaligned_be64(&phys_lun->wwid[0]),
2480                                         get_unaligned_be64(&phys_lun->wwid[8]));
2481                         else
2482                                 dev_warn(&ctrl_info->pci_dev->dev,
2483                                         "obtaining device info failed, skipping logical device %08x%08x\n",
2484                                         *((u32 *)&device->scsi3addr),
2485                                         *((u32 *)&device->scsi3addr[4]));
2486                         rc = 0;
2487                         continue;
2488                 }
2489
2490                 /* Do not present disks that the OS cannot fully probe. */
2491                 if (pqi_keep_device_offline(device))
2492                         continue;
2493
2494                 pqi_assign_bus_target_lun(device);
2495
2496                 if (device->is_physical_device) {
2497                         memcpy(device->wwid, phys_lun->wwid, sizeof(device->wwid));
2498                         if ((phys_lun->device_flags &
2499                                 CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED) &&
2500                                 phys_lun->aio_handle) {
2501                                         device->aio_enabled = true;
2502                                         device->aio_handle =
2503                                                 phys_lun->aio_handle;
2504                         }
2505                 } else {
2506                         memcpy(device->volume_id, log_lun->volume_id,
2507                                 sizeof(device->volume_id));
2508                 }
2509
2510                 device->sas_address = get_unaligned_be64(&device->wwid[0]);
2511
2512                 new_device_list[num_valid_devices++] = device;
2513         }
2514
2515         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
2516
2517 out:
2518         list_for_each_entry_safe(device, next, &new_device_list_head,
2519                 new_device_list_entry) {
2520                 if (device->keep_device)
2521                         continue;
2522                 list_del(&device->new_device_list_entry);
2523                 pqi_free_device(device);
2524         }
2525
2526         kfree(new_device_list);
2527         kfree(physdev_list);
2528         kfree(logdev_list);
2529         kfree(id_phys);
2530
2531         return rc;
2532 }
2533
2534 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2535 {
2536         int rc;
2537         int mutex_acquired;
2538
2539         if (pqi_ctrl_offline(ctrl_info))
2540                 return -ENXIO;
2541
2542         mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
2543
2544         if (!mutex_acquired) {
2545                 if (pqi_ctrl_scan_blocked(ctrl_info))
2546                         return -EBUSY;
2547                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2548                 return -EINPROGRESS;
2549         }
2550
2551         rc = pqi_update_scsi_devices(ctrl_info);
2552         if (rc && !pqi_ctrl_scan_blocked(ctrl_info))
2553                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2554
2555         mutex_unlock(&ctrl_info->scan_mutex);
2556
2557         return rc;
2558 }
2559
2560 static void pqi_scan_start(struct Scsi_Host *shost)
2561 {
2562         struct pqi_ctrl_info *ctrl_info;
2563
2564         ctrl_info = shost_to_hba(shost);
2565
2566         pqi_scan_scsi_devices(ctrl_info);
2567 }
2568
2569 /* Returns TRUE if scan is finished. */
2570
2571 static int pqi_scan_finished(struct Scsi_Host *shost,
2572         unsigned long elapsed_time)
2573 {
2574         struct pqi_ctrl_info *ctrl_info;
2575
2576         ctrl_info = shost_priv(shost);
2577
2578         return !mutex_is_locked(&ctrl_info->scan_mutex);
2579 }
2580
2581 static inline void pqi_set_encryption_info(struct pqi_encryption_info *encryption_info,
2582         struct raid_map *raid_map, u64 first_block)
2583 {
2584         u32 volume_blk_size;
2585
2586         /*
2587          * Set the encryption tweak values based on logical block address.
2588          * If the block size is 512, the tweak value is equal to the LBA.
2589          * For other block sizes, tweak value is (LBA * block size) / 512.
2590          */
2591         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2592         if (volume_blk_size != 512)
2593                 first_block = (first_block * volume_blk_size) / 512;
2594
2595         encryption_info->data_encryption_key_index =
2596                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2597         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2598         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2599 }
2600
2601 /*
2602  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2603  */
2604
2605 static bool pqi_aio_raid_level_supported(struct pqi_ctrl_info *ctrl_info,
2606         struct pqi_scsi_dev_raid_map_data *rmd)
2607 {
2608         bool is_supported = true;
2609
2610         switch (rmd->raid_level) {
2611         case SA_RAID_0:
2612                 break;
2613         case SA_RAID_1:
2614                 if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2615                         rmd->data_length > ctrl_info->max_write_raid_1_10_2drive))
2616                         is_supported = false;
2617                 break;
2618         case SA_RAID_TRIPLE:
2619                 if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2620                         rmd->data_length > ctrl_info->max_write_raid_1_10_3drive))
2621                         is_supported = false;
2622                 break;
2623         case SA_RAID_5:
2624                 if (rmd->is_write && (!ctrl_info->enable_r5_writes ||
2625                         rmd->data_length > ctrl_info->max_write_raid_5_6))
2626                         is_supported = false;
2627                 break;
2628         case SA_RAID_6:
2629                 if (rmd->is_write && (!ctrl_info->enable_r6_writes ||
2630                         rmd->data_length > ctrl_info->max_write_raid_5_6))
2631                         is_supported = false;
2632                 break;
2633         default:
2634                 is_supported = false;
2635                 break;
2636         }
2637
2638         return is_supported;
2639 }
2640
2641 #define PQI_RAID_BYPASS_INELIGIBLE      1
2642
2643 static int pqi_get_aio_lba_and_block_count(struct scsi_cmnd *scmd,
2644         struct pqi_scsi_dev_raid_map_data *rmd)
2645 {
2646         /* Check for valid opcode, get LBA and block count. */
2647         switch (scmd->cmnd[0]) {
2648         case WRITE_6:
2649                 rmd->is_write = true;
2650                 fallthrough;
2651         case READ_6:
2652                 rmd->first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2653                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2654                 rmd->block_cnt = (u32)scmd->cmnd[4];
2655                 if (rmd->block_cnt == 0)
2656                         rmd->block_cnt = 256;
2657                 break;
2658         case WRITE_10:
2659                 rmd->is_write = true;
2660                 fallthrough;
2661         case READ_10:
2662                 rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2663                 rmd->block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2664                 break;
2665         case WRITE_12:
2666                 rmd->is_write = true;
2667                 fallthrough;
2668         case READ_12:
2669                 rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2670                 rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2671                 break;
2672         case WRITE_16:
2673                 rmd->is_write = true;
2674                 fallthrough;
2675         case READ_16:
2676                 rmd->first_block = get_unaligned_be64(&scmd->cmnd[2]);
2677                 rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2678                 break;
2679         default:
2680                 /* Process via normal I/O path. */
2681                 return PQI_RAID_BYPASS_INELIGIBLE;
2682         }
2683
2684         put_unaligned_le32(scsi_bufflen(scmd), &rmd->data_length);
2685
2686         return 0;
2687 }
2688
2689 static int pci_get_aio_common_raid_map_values(struct pqi_ctrl_info *ctrl_info,
2690         struct pqi_scsi_dev_raid_map_data *rmd, struct raid_map *raid_map)
2691 {
2692 #if BITS_PER_LONG == 32
2693         u64 tmpdiv;
2694 #endif
2695
2696         rmd->last_block = rmd->first_block + rmd->block_cnt - 1;
2697
2698         /* Check for invalid block or wraparound. */
2699         if (rmd->last_block >=
2700                 get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2701                 rmd->last_block < rmd->first_block)
2702                 return PQI_RAID_BYPASS_INELIGIBLE;
2703
2704         rmd->data_disks_per_row =
2705                 get_unaligned_le16(&raid_map->data_disks_per_row);
2706         rmd->strip_size = get_unaligned_le16(&raid_map->strip_size);
2707         rmd->layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2708
2709         /* Calculate stripe information for the request. */
2710         rmd->blocks_per_row = rmd->data_disks_per_row * rmd->strip_size;
2711         if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2712                 return PQI_RAID_BYPASS_INELIGIBLE;
2713 #if BITS_PER_LONG == 32
2714         tmpdiv = rmd->first_block;
2715         do_div(tmpdiv, rmd->blocks_per_row);
2716         rmd->first_row = tmpdiv;
2717         tmpdiv = rmd->last_block;
2718         do_div(tmpdiv, rmd->blocks_per_row);
2719         rmd->last_row = tmpdiv;
2720         rmd->first_row_offset = (u32)(rmd->first_block - (rmd->first_row * rmd->blocks_per_row));
2721         rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row * rmd->blocks_per_row));
2722         tmpdiv = rmd->first_row_offset;
2723         do_div(tmpdiv, rmd->strip_size);
2724         rmd->first_column = tmpdiv;
2725         tmpdiv = rmd->last_row_offset;
2726         do_div(tmpdiv, rmd->strip_size);
2727         rmd->last_column = tmpdiv;
2728 #else
2729         rmd->first_row = rmd->first_block / rmd->blocks_per_row;
2730         rmd->last_row = rmd->last_block / rmd->blocks_per_row;
2731         rmd->first_row_offset = (u32)(rmd->first_block -
2732                 (rmd->first_row * rmd->blocks_per_row));
2733         rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row *
2734                 rmd->blocks_per_row));
2735         rmd->first_column = rmd->first_row_offset / rmd->strip_size;
2736         rmd->last_column = rmd->last_row_offset / rmd->strip_size;
2737 #endif
2738
2739         /* If this isn't a single row/column then give to the controller. */
2740         if (rmd->first_row != rmd->last_row ||
2741                 rmd->first_column != rmd->last_column)
2742                 return PQI_RAID_BYPASS_INELIGIBLE;
2743
2744         /* Proceeding with driver mapping. */
2745         rmd->total_disks_per_row = rmd->data_disks_per_row +
2746                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2747         rmd->map_row = ((u32)(rmd->first_row >>
2748                 raid_map->parity_rotation_shift)) %
2749                 get_unaligned_le16(&raid_map->row_cnt);
2750         rmd->map_index = (rmd->map_row * rmd->total_disks_per_row) +
2751                 rmd->first_column;
2752
2753         return 0;
2754 }
2755
2756 static int pqi_calc_aio_r5_or_r6(struct pqi_scsi_dev_raid_map_data *rmd,
2757         struct raid_map *raid_map)
2758 {
2759 #if BITS_PER_LONG == 32
2760         u64 tmpdiv;
2761 #endif
2762
2763         if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2764                 return PQI_RAID_BYPASS_INELIGIBLE;
2765
2766         /* RAID 50/60 */
2767         /* Verify first and last block are in same RAID group. */
2768         rmd->stripesize = rmd->blocks_per_row * rmd->layout_map_count;
2769 #if BITS_PER_LONG == 32
2770         tmpdiv = rmd->first_block;
2771         rmd->first_group = do_div(tmpdiv, rmd->stripesize);
2772         tmpdiv = rmd->first_group;
2773         do_div(tmpdiv, rmd->blocks_per_row);
2774         rmd->first_group = tmpdiv;
2775         tmpdiv = rmd->last_block;
2776         rmd->last_group = do_div(tmpdiv, rmd->stripesize);
2777         tmpdiv = rmd->last_group;
2778         do_div(tmpdiv, rmd->blocks_per_row);
2779         rmd->last_group = tmpdiv;
2780 #else
2781         rmd->first_group = (rmd->first_block % rmd->stripesize) / rmd->blocks_per_row;
2782         rmd->last_group = (rmd->last_block % rmd->stripesize) / rmd->blocks_per_row;
2783 #endif
2784         if (rmd->first_group != rmd->last_group)
2785                 return PQI_RAID_BYPASS_INELIGIBLE;
2786
2787         /* Verify request is in a single row of RAID 5/6. */
2788 #if BITS_PER_LONG == 32
2789         tmpdiv = rmd->first_block;
2790         do_div(tmpdiv, rmd->stripesize);
2791         rmd->first_row = tmpdiv;
2792         rmd->r5or6_first_row = tmpdiv;
2793         tmpdiv = rmd->last_block;
2794         do_div(tmpdiv, rmd->stripesize);
2795         rmd->r5or6_last_row = tmpdiv;
2796 #else
2797         rmd->first_row = rmd->r5or6_first_row =
2798                 rmd->first_block / rmd->stripesize;
2799         rmd->r5or6_last_row = rmd->last_block / rmd->stripesize;
2800 #endif
2801         if (rmd->r5or6_first_row != rmd->r5or6_last_row)
2802                 return PQI_RAID_BYPASS_INELIGIBLE;
2803
2804         /* Verify request is in a single column. */
2805 #if BITS_PER_LONG == 32
2806         tmpdiv = rmd->first_block;
2807         rmd->first_row_offset = do_div(tmpdiv, rmd->stripesize);
2808         tmpdiv = rmd->first_row_offset;
2809         rmd->first_row_offset = (u32)do_div(tmpdiv, rmd->blocks_per_row);
2810         rmd->r5or6_first_row_offset = rmd->first_row_offset;
2811         tmpdiv = rmd->last_block;
2812         rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->stripesize);
2813         tmpdiv = rmd->r5or6_last_row_offset;
2814         rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->blocks_per_row);
2815         tmpdiv = rmd->r5or6_first_row_offset;
2816         do_div(tmpdiv, rmd->strip_size);
2817         rmd->first_column = rmd->r5or6_first_column = tmpdiv;
2818         tmpdiv = rmd->r5or6_last_row_offset;
2819         do_div(tmpdiv, rmd->strip_size);
2820         rmd->r5or6_last_column = tmpdiv;
2821 #else
2822         rmd->first_row_offset = rmd->r5or6_first_row_offset =
2823                 (u32)((rmd->first_block % rmd->stripesize) %
2824                 rmd->blocks_per_row);
2825
2826         rmd->r5or6_last_row_offset =
2827                 (u32)((rmd->last_block % rmd->stripesize) %
2828                 rmd->blocks_per_row);
2829
2830         rmd->first_column =
2831                 rmd->r5or6_first_row_offset / rmd->strip_size;
2832         rmd->r5or6_first_column = rmd->first_column;
2833         rmd->r5or6_last_column = rmd->r5or6_last_row_offset / rmd->strip_size;
2834 #endif
2835         if (rmd->r5or6_first_column != rmd->r5or6_last_column)
2836                 return PQI_RAID_BYPASS_INELIGIBLE;
2837
2838         /* Request is eligible. */
2839         rmd->map_row =
2840                 ((u32)(rmd->first_row >> raid_map->parity_rotation_shift)) %
2841                 get_unaligned_le16(&raid_map->row_cnt);
2842
2843         rmd->map_index = (rmd->first_group *
2844                 (get_unaligned_le16(&raid_map->row_cnt) *
2845                 rmd->total_disks_per_row)) +
2846                 (rmd->map_row * rmd->total_disks_per_row) + rmd->first_column;
2847
2848         if (rmd->is_write) {
2849                 u32 index;
2850
2851                 /*
2852                  * p_parity_it_nexus and q_parity_it_nexus are pointers to the
2853                  * parity entries inside the device's raid_map.
2854                  *
2855                  * A device's RAID map is bounded by: number of RAID disks squared.
2856                  *
2857                  * The devices RAID map size is checked during device
2858                  * initialization.
2859                  */
2860                 index = DIV_ROUND_UP(rmd->map_index + 1, rmd->total_disks_per_row);
2861                 index *= rmd->total_disks_per_row;
2862                 index -= get_unaligned_le16(&raid_map->metadata_disks_per_row);
2863
2864                 rmd->p_parity_it_nexus = raid_map->disk_data[index].aio_handle;
2865                 if (rmd->raid_level == SA_RAID_6) {
2866                         rmd->q_parity_it_nexus = raid_map->disk_data[index + 1].aio_handle;
2867                         rmd->xor_mult = raid_map->disk_data[rmd->map_index].xor_mult[1];
2868                 }
2869 #if BITS_PER_LONG == 32
2870                 tmpdiv = rmd->first_block;
2871                 do_div(tmpdiv, rmd->blocks_per_row);
2872                 rmd->row = tmpdiv;
2873 #else
2874                 rmd->row = rmd->first_block / rmd->blocks_per_row;
2875 #endif
2876         }
2877
2878         return 0;
2879 }
2880
2881 static void pqi_set_aio_cdb(struct pqi_scsi_dev_raid_map_data *rmd)
2882 {
2883         /* Build the new CDB for the physical disk I/O. */
2884         if (rmd->disk_block > 0xffffffff) {
2885                 rmd->cdb[0] = rmd->is_write ? WRITE_16 : READ_16;
2886                 rmd->cdb[1] = 0;
2887                 put_unaligned_be64(rmd->disk_block, &rmd->cdb[2]);
2888                 put_unaligned_be32(rmd->disk_block_cnt, &rmd->cdb[10]);
2889                 rmd->cdb[14] = 0;
2890                 rmd->cdb[15] = 0;
2891                 rmd->cdb_length = 16;
2892         } else {
2893                 rmd->cdb[0] = rmd->is_write ? WRITE_10 : READ_10;
2894                 rmd->cdb[1] = 0;
2895                 put_unaligned_be32((u32)rmd->disk_block, &rmd->cdb[2]);
2896                 rmd->cdb[6] = 0;
2897                 put_unaligned_be16((u16)rmd->disk_block_cnt, &rmd->cdb[7]);
2898                 rmd->cdb[9] = 0;
2899                 rmd->cdb_length = 10;
2900         }
2901 }
2902
2903 static void pqi_calc_aio_r1_nexus(struct raid_map *raid_map,
2904         struct pqi_scsi_dev_raid_map_data *rmd)
2905 {
2906         u32 index;
2907         u32 group;
2908
2909         group = rmd->map_index / rmd->data_disks_per_row;
2910
2911         index = rmd->map_index - (group * rmd->data_disks_per_row);
2912         rmd->it_nexus[0] = raid_map->disk_data[index].aio_handle;
2913         index += rmd->data_disks_per_row;
2914         rmd->it_nexus[1] = raid_map->disk_data[index].aio_handle;
2915         if (rmd->layout_map_count > 2) {
2916                 index += rmd->data_disks_per_row;
2917                 rmd->it_nexus[2] = raid_map->disk_data[index].aio_handle;
2918         }
2919
2920         rmd->num_it_nexus_entries = rmd->layout_map_count;
2921 }
2922
2923 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2924         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2925         struct pqi_queue_group *queue_group)
2926 {
2927         int rc;
2928         struct raid_map *raid_map;
2929         u32 group;
2930         u32 next_bypass_group;
2931         struct pqi_encryption_info *encryption_info_ptr;
2932         struct pqi_encryption_info encryption_info;
2933         struct pqi_scsi_dev_raid_map_data rmd = { 0 };
2934
2935         rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
2936         if (rc)
2937                 return PQI_RAID_BYPASS_INELIGIBLE;
2938
2939         rmd.raid_level = device->raid_level;
2940
2941         if (!pqi_aio_raid_level_supported(ctrl_info, &rmd))
2942                 return PQI_RAID_BYPASS_INELIGIBLE;
2943
2944         if (unlikely(rmd.block_cnt == 0))
2945                 return PQI_RAID_BYPASS_INELIGIBLE;
2946
2947         raid_map = device->raid_map;
2948
2949         rc = pci_get_aio_common_raid_map_values(ctrl_info, &rmd, raid_map);
2950         if (rc)
2951                 return PQI_RAID_BYPASS_INELIGIBLE;
2952
2953         if (device->raid_level == SA_RAID_1 ||
2954                 device->raid_level == SA_RAID_TRIPLE) {
2955                 if (rmd.is_write) {
2956                         pqi_calc_aio_r1_nexus(raid_map, &rmd);
2957                 } else {
2958                         group = device->next_bypass_group[rmd.map_index];
2959                         next_bypass_group = group + 1;
2960                         if (next_bypass_group >= rmd.layout_map_count)
2961                                 next_bypass_group = 0;
2962                         device->next_bypass_group[rmd.map_index] = next_bypass_group;
2963                         rmd.map_index += group * rmd.data_disks_per_row;
2964                 }
2965         } else if ((device->raid_level == SA_RAID_5 ||
2966                 device->raid_level == SA_RAID_6) &&
2967                 (rmd.layout_map_count > 1 || rmd.is_write)) {
2968                 rc = pqi_calc_aio_r5_or_r6(&rmd, raid_map);
2969                 if (rc)
2970                         return PQI_RAID_BYPASS_INELIGIBLE;
2971         }
2972
2973         if (unlikely(rmd.map_index >= RAID_MAP_MAX_ENTRIES))
2974                 return PQI_RAID_BYPASS_INELIGIBLE;
2975
2976         rmd.aio_handle = raid_map->disk_data[rmd.map_index].aio_handle;
2977         rmd.disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2978                 rmd.first_row * rmd.strip_size +
2979                 (rmd.first_row_offset - rmd.first_column * rmd.strip_size);
2980         rmd.disk_block_cnt = rmd.block_cnt;
2981
2982         /* Handle differing logical/physical block sizes. */
2983         if (raid_map->phys_blk_shift) {
2984                 rmd.disk_block <<= raid_map->phys_blk_shift;
2985                 rmd.disk_block_cnt <<= raid_map->phys_blk_shift;
2986         }
2987
2988         if (unlikely(rmd.disk_block_cnt > 0xffff))
2989                 return PQI_RAID_BYPASS_INELIGIBLE;
2990
2991         pqi_set_aio_cdb(&rmd);
2992
2993         if (get_unaligned_le16(&raid_map->flags) & RAID_MAP_ENCRYPTION_ENABLED) {
2994                 if (rmd.data_length > device->max_transfer_encrypted)
2995                         return PQI_RAID_BYPASS_INELIGIBLE;
2996                 pqi_set_encryption_info(&encryption_info, raid_map, rmd.first_block);
2997                 encryption_info_ptr = &encryption_info;
2998         } else {
2999                 encryption_info_ptr = NULL;
3000         }
3001
3002         if (rmd.is_write) {
3003                 switch (device->raid_level) {
3004                 case SA_RAID_1:
3005                 case SA_RAID_TRIPLE:
3006                         return pqi_aio_submit_r1_write_io(ctrl_info, scmd, queue_group,
3007                                 encryption_info_ptr, device, &rmd);
3008                 case SA_RAID_5:
3009                 case SA_RAID_6:
3010                         return pqi_aio_submit_r56_write_io(ctrl_info, scmd, queue_group,
3011                                 encryption_info_ptr, device, &rmd);
3012                 }
3013         }
3014
3015         return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
3016                 rmd.cdb, rmd.cdb_length, queue_group,
3017                 encryption_info_ptr, true, false);
3018 }
3019
3020 #define PQI_STATUS_IDLE         0x0
3021
3022 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
3023 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
3024
3025 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
3026 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
3027 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
3028 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
3029 #define PQI_DEVICE_STATE_ERROR                          0x4
3030
3031 #define PQI_MODE_READY_TIMEOUT_SECS             30
3032 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
3033
3034 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
3035 {
3036         struct pqi_device_registers __iomem *pqi_registers;
3037         unsigned long timeout;
3038         u64 signature;
3039         u8 status;
3040
3041         pqi_registers = ctrl_info->pqi_registers;
3042         timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
3043
3044         while (1) {
3045                 signature = readq(&pqi_registers->signature);
3046                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
3047                         sizeof(signature)) == 0)
3048                         break;
3049                 if (time_after(jiffies, timeout)) {
3050                         dev_err(&ctrl_info->pci_dev->dev,
3051                                 "timed out waiting for PQI signature\n");
3052                         return -ETIMEDOUT;
3053                 }
3054                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3055         }
3056
3057         while (1) {
3058                 status = readb(&pqi_registers->function_and_status_code);
3059                 if (status == PQI_STATUS_IDLE)
3060                         break;
3061                 if (time_after(jiffies, timeout)) {
3062                         dev_err(&ctrl_info->pci_dev->dev,
3063                                 "timed out waiting for PQI IDLE\n");
3064                         return -ETIMEDOUT;
3065                 }
3066                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3067         }
3068
3069         while (1) {
3070                 if (readl(&pqi_registers->device_status) ==
3071                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
3072                         break;
3073                 if (time_after(jiffies, timeout)) {
3074                         dev_err(&ctrl_info->pci_dev->dev,
3075                                 "timed out waiting for PQI all registers ready\n");
3076                         return -ETIMEDOUT;
3077                 }
3078                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3079         }
3080
3081         return 0;
3082 }
3083
3084 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
3085 {
3086         struct pqi_scsi_dev *device;
3087
3088         device = io_request->scmd->device->hostdata;
3089         device->raid_bypass_enabled = false;
3090         device->aio_enabled = false;
3091 }
3092
3093 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
3094 {
3095         struct pqi_ctrl_info *ctrl_info;
3096         struct pqi_scsi_dev *device;
3097
3098         device = sdev->hostdata;
3099         if (device->device_offline)
3100                 return;
3101
3102         device->device_offline = true;
3103         ctrl_info = shost_to_hba(sdev->host);
3104         pqi_schedule_rescan_worker(ctrl_info);
3105         dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
3106                 path, ctrl_info->scsi_host->host_no, device->bus,
3107                 device->target, device->lun);
3108 }
3109
3110 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
3111 {
3112         u8 scsi_status;
3113         u8 host_byte;
3114         struct scsi_cmnd *scmd;
3115         struct pqi_raid_error_info *error_info;
3116         size_t sense_data_length;
3117         int residual_count;
3118         int xfer_count;
3119         struct scsi_sense_hdr sshdr;
3120
3121         scmd = io_request->scmd;
3122         if (!scmd)
3123                 return;
3124
3125         error_info = io_request->error_info;
3126         scsi_status = error_info->status;
3127         host_byte = DID_OK;
3128
3129         switch (error_info->data_out_result) {
3130         case PQI_DATA_IN_OUT_GOOD:
3131                 break;
3132         case PQI_DATA_IN_OUT_UNDERFLOW:
3133                 xfer_count =
3134                         get_unaligned_le32(&error_info->data_out_transferred);
3135                 residual_count = scsi_bufflen(scmd) - xfer_count;
3136                 scsi_set_resid(scmd, residual_count);
3137                 if (xfer_count < scmd->underflow)
3138                         host_byte = DID_SOFT_ERROR;
3139                 break;
3140         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
3141         case PQI_DATA_IN_OUT_ABORTED:
3142                 host_byte = DID_ABORT;
3143                 break;
3144         case PQI_DATA_IN_OUT_TIMEOUT:
3145                 host_byte = DID_TIME_OUT;
3146                 break;
3147         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
3148         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
3149         case PQI_DATA_IN_OUT_BUFFER_ERROR:
3150         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
3151         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
3152         case PQI_DATA_IN_OUT_ERROR:
3153         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
3154         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
3155         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
3156         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
3157         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
3158         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
3159         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
3160         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
3161         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
3162         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
3163         default:
3164                 host_byte = DID_ERROR;
3165                 break;
3166         }
3167
3168         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
3169         if (sense_data_length == 0)
3170                 sense_data_length =
3171                         get_unaligned_le16(&error_info->response_data_length);
3172         if (sense_data_length) {
3173                 if (sense_data_length > sizeof(error_info->data))
3174                         sense_data_length = sizeof(error_info->data);
3175
3176                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3177                         scsi_normalize_sense(error_info->data,
3178                                 sense_data_length, &sshdr) &&
3179                                 sshdr.sense_key == HARDWARE_ERROR &&
3180                                 sshdr.asc == 0x3e) {
3181                         struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
3182                         struct pqi_scsi_dev *device = scmd->device->hostdata;
3183
3184                         switch (sshdr.ascq) {
3185                         case 0x1: /* LOGICAL UNIT FAILURE */
3186                                 if (printk_ratelimit())
3187                                         scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
3188                                                 ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3189                                 pqi_take_device_offline(scmd->device, "RAID");
3190                                 host_byte = DID_NO_CONNECT;
3191                                 break;
3192
3193                         default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */
3194                                 if (printk_ratelimit())
3195                                         scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n",
3196                                                 sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3197                                 break;
3198                         }
3199                 }
3200
3201                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3202                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
3203                 memcpy(scmd->sense_buffer, error_info->data,
3204                         sense_data_length);
3205         }
3206
3207         scmd->result = scsi_status;
3208         set_host_byte(scmd, host_byte);
3209 }
3210
3211 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
3212 {
3213         u8 scsi_status;
3214         u8 host_byte;
3215         struct scsi_cmnd *scmd;
3216         struct pqi_aio_error_info *error_info;
3217         size_t sense_data_length;
3218         int residual_count;
3219         int xfer_count;
3220         bool device_offline;
3221         struct pqi_scsi_dev *device;
3222
3223         scmd = io_request->scmd;
3224         error_info = io_request->error_info;
3225         host_byte = DID_OK;
3226         sense_data_length = 0;
3227         device_offline = false;
3228         device = scmd->device->hostdata;
3229
3230         switch (error_info->service_response) {
3231         case PQI_AIO_SERV_RESPONSE_COMPLETE:
3232                 scsi_status = error_info->status;
3233                 break;
3234         case PQI_AIO_SERV_RESPONSE_FAILURE:
3235                 switch (error_info->status) {
3236                 case PQI_AIO_STATUS_IO_ABORTED:
3237                         scsi_status = SAM_STAT_TASK_ABORTED;
3238                         break;
3239                 case PQI_AIO_STATUS_UNDERRUN:
3240                         scsi_status = SAM_STAT_GOOD;
3241                         residual_count = get_unaligned_le32(
3242                                                 &error_info->residual_count);
3243                         scsi_set_resid(scmd, residual_count);
3244                         xfer_count = scsi_bufflen(scmd) - residual_count;
3245                         if (xfer_count < scmd->underflow)
3246                                 host_byte = DID_SOFT_ERROR;
3247                         break;
3248                 case PQI_AIO_STATUS_OVERRUN:
3249                         scsi_status = SAM_STAT_GOOD;
3250                         break;
3251                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
3252                         pqi_aio_path_disabled(io_request);
3253                         if (pqi_is_multipath_device(device)) {
3254                                 pqi_device_remove_start(device);
3255                                 host_byte = DID_NO_CONNECT;
3256                                 scsi_status = SAM_STAT_CHECK_CONDITION;
3257                         } else {
3258                                 scsi_status = SAM_STAT_GOOD;
3259                                 io_request->status = -EAGAIN;
3260                         }
3261                         break;
3262                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
3263                 case PQI_AIO_STATUS_INVALID_DEVICE:
3264                         if (!io_request->raid_bypass) {
3265                                 device_offline = true;
3266                                 pqi_take_device_offline(scmd->device, "AIO");
3267                                 host_byte = DID_NO_CONNECT;
3268                         }
3269                         scsi_status = SAM_STAT_CHECK_CONDITION;
3270                         break;
3271                 case PQI_AIO_STATUS_IO_ERROR:
3272                 default:
3273                         scsi_status = SAM_STAT_CHECK_CONDITION;
3274                         break;
3275                 }
3276                 break;
3277         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
3278         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
3279                 scsi_status = SAM_STAT_GOOD;
3280                 break;
3281         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
3282         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
3283         default:
3284                 scsi_status = SAM_STAT_CHECK_CONDITION;
3285                 break;
3286         }
3287
3288         if (error_info->data_present) {
3289                 sense_data_length =
3290                         get_unaligned_le16(&error_info->data_length);
3291                 if (sense_data_length) {
3292                         if (sense_data_length > sizeof(error_info->data))
3293                                 sense_data_length = sizeof(error_info->data);
3294                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3295                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
3296                         memcpy(scmd->sense_buffer, error_info->data,
3297                                 sense_data_length);
3298                 }
3299         }
3300
3301         if (device_offline && sense_data_length == 0)
3302                 scsi_build_sense(scmd, 0, HARDWARE_ERROR, 0x3e, 0x1);
3303
3304         scmd->result = scsi_status;
3305         set_host_byte(scmd, host_byte);
3306 }
3307
3308 static void pqi_process_io_error(unsigned int iu_type,
3309         struct pqi_io_request *io_request)
3310 {
3311         switch (iu_type) {
3312         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3313                 pqi_process_raid_io_error(io_request);
3314                 break;
3315         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3316                 pqi_process_aio_io_error(io_request);
3317                 break;
3318         }
3319 }
3320
3321 static int pqi_interpret_task_management_response(struct pqi_ctrl_info *ctrl_info,
3322         struct pqi_task_management_response *response)
3323 {
3324         int rc;
3325
3326         switch (response->response_code) {
3327         case SOP_TMF_COMPLETE:
3328         case SOP_TMF_FUNCTION_SUCCEEDED:
3329                 rc = 0;
3330                 break;
3331         case SOP_TMF_REJECTED:
3332                 rc = -EAGAIN;
3333                 break;
3334         case SOP_RC_INCORRECT_LOGICAL_UNIT:
3335                 rc = -ENODEV;
3336                 break;
3337         default:
3338                 rc = -EIO;
3339                 break;
3340         }
3341
3342         if (rc)
3343                 dev_err(&ctrl_info->pci_dev->dev,
3344                         "Task Management Function error: %d (response code: %u)\n", rc, response->response_code);
3345
3346         return rc;
3347 }
3348
3349 static inline void pqi_invalid_response(struct pqi_ctrl_info *ctrl_info,
3350         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
3351 {
3352         pqi_take_ctrl_offline(ctrl_info, ctrl_shutdown_reason);
3353 }
3354
3355 static int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info, struct pqi_queue_group *queue_group)
3356 {
3357         int num_responses;
3358         pqi_index_t oq_pi;
3359         pqi_index_t oq_ci;
3360         struct pqi_io_request *io_request;
3361         struct pqi_io_response *response;
3362         u16 request_id;
3363
3364         num_responses = 0;
3365         oq_ci = queue_group->oq_ci_copy;
3366
3367         while (1) {
3368                 oq_pi = readl(queue_group->oq_pi);
3369                 if (oq_pi >= ctrl_info->num_elements_per_oq) {
3370                         pqi_invalid_response(ctrl_info, PQI_IO_PI_OUT_OF_RANGE);
3371                         dev_err(&ctrl_info->pci_dev->dev,
3372                                 "I/O interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3373                                 oq_pi, ctrl_info->num_elements_per_oq - 1, oq_ci);
3374                         return -1;
3375                 }
3376                 if (oq_pi == oq_ci)
3377                         break;
3378
3379                 num_responses++;
3380                 response = queue_group->oq_element_array +
3381                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3382
3383                 request_id = get_unaligned_le16(&response->request_id);
3384                 if (request_id >= ctrl_info->max_io_slots) {
3385                         pqi_invalid_response(ctrl_info, PQI_INVALID_REQ_ID);
3386                         dev_err(&ctrl_info->pci_dev->dev,
3387                                 "request ID in response (%u) out of range (0-%u): producer index: %u  consumer index: %u\n",
3388                                 request_id, ctrl_info->max_io_slots - 1, oq_pi, oq_ci);
3389                         return -1;
3390                 }
3391
3392                 io_request = &ctrl_info->io_request_pool[request_id];
3393                 if (atomic_read(&io_request->refcount) == 0) {
3394                         pqi_invalid_response(ctrl_info, PQI_UNMATCHED_REQ_ID);
3395                         dev_err(&ctrl_info->pci_dev->dev,
3396                                 "request ID in response (%u) does not match an outstanding I/O request: producer index: %u  consumer index: %u\n",
3397                                 request_id, oq_pi, oq_ci);
3398                         return -1;
3399                 }
3400
3401                 switch (response->header.iu_type) {
3402                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
3403                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
3404                         if (io_request->scmd)
3405                                 io_request->scmd->result = 0;
3406                         fallthrough;
3407                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
3408                         break;
3409                 case PQI_RESPONSE_IU_VENDOR_GENERAL:
3410                         io_request->status =
3411                                 get_unaligned_le16(
3412                                 &((struct pqi_vendor_general_response *)response)->status);
3413                         break;
3414                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
3415                         io_request->status = pqi_interpret_task_management_response(ctrl_info,
3416                                 (void *)response);
3417                         break;
3418                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
3419                         pqi_aio_path_disabled(io_request);
3420                         io_request->status = -EAGAIN;
3421                         break;
3422                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3423                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3424                         io_request->error_info = ctrl_info->error_buffer +
3425                                 (get_unaligned_le16(&response->error_index) *
3426                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
3427                         pqi_process_io_error(response->header.iu_type, io_request);
3428                         break;
3429                 default:
3430                         pqi_invalid_response(ctrl_info, PQI_UNEXPECTED_IU_TYPE);
3431                         dev_err(&ctrl_info->pci_dev->dev,
3432                                 "unexpected IU type: 0x%x: producer index: %u  consumer index: %u\n",
3433                                 response->header.iu_type, oq_pi, oq_ci);
3434                         return -1;
3435                 }
3436
3437                 io_request->io_complete_callback(io_request, io_request->context);
3438
3439                 /*
3440                  * Note that the I/O request structure CANNOT BE TOUCHED after
3441                  * returning from the I/O completion callback!
3442                  */
3443                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
3444         }
3445
3446         if (num_responses) {
3447                 queue_group->oq_ci_copy = oq_ci;
3448                 writel(oq_ci, queue_group->oq_ci);
3449         }
3450
3451         return num_responses;
3452 }
3453
3454 static inline unsigned int pqi_num_elements_free(unsigned int pi,
3455         unsigned int ci, unsigned int elements_in_queue)
3456 {
3457         unsigned int num_elements_used;
3458
3459         if (pi >= ci)
3460                 num_elements_used = pi - ci;
3461         else
3462                 num_elements_used = elements_in_queue - ci + pi;
3463
3464         return elements_in_queue - num_elements_used - 1;
3465 }
3466
3467 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
3468         struct pqi_event_acknowledge_request *iu, size_t iu_length)
3469 {
3470         pqi_index_t iq_pi;
3471         pqi_index_t iq_ci;
3472         unsigned long flags;
3473         void *next_element;
3474         struct pqi_queue_group *queue_group;
3475
3476         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
3477         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
3478
3479         while (1) {
3480                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
3481
3482                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
3483                 iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
3484
3485                 if (pqi_num_elements_free(iq_pi, iq_ci,
3486                         ctrl_info->num_elements_per_iq))
3487                         break;
3488
3489                 spin_unlock_irqrestore(
3490                         &queue_group->submit_lock[RAID_PATH], flags);
3491
3492                 if (pqi_ctrl_offline(ctrl_info))
3493                         return;
3494         }
3495
3496         next_element = queue_group->iq_element_array[RAID_PATH] +
3497                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3498
3499         memcpy(next_element, iu, iu_length);
3500
3501         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
3502         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
3503
3504         /*
3505          * This write notifies the controller that an IU is available to be
3506          * processed.
3507          */
3508         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
3509
3510         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
3511 }
3512
3513 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
3514         struct pqi_event *event)
3515 {
3516         struct pqi_event_acknowledge_request request;
3517
3518         memset(&request, 0, sizeof(request));
3519
3520         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
3521         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
3522                 &request.header.iu_length);
3523         request.event_type = event->event_type;
3524         put_unaligned_le16(event->event_id, &request.event_id);
3525         put_unaligned_le32(event->additional_event_id, &request.additional_event_id);
3526
3527         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
3528 }
3529
3530 #define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS              30
3531 #define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS        1
3532
3533 static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
3534         struct pqi_ctrl_info *ctrl_info)
3535 {
3536         u8 status;
3537         unsigned long timeout;
3538
3539         timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * HZ) + jiffies;
3540
3541         while (1) {
3542                 status = pqi_read_soft_reset_status(ctrl_info);
3543                 if (status & PQI_SOFT_RESET_INITIATE)
3544                         return RESET_INITIATE_DRIVER;
3545
3546                 if (status & PQI_SOFT_RESET_ABORT)
3547                         return RESET_ABORT;
3548
3549                 if (!sis_is_firmware_running(ctrl_info))
3550                         return RESET_NORESPONSE;
3551
3552                 if (time_after(jiffies, timeout)) {
3553                         dev_warn(&ctrl_info->pci_dev->dev,
3554                                 "timed out waiting for soft reset status\n");
3555                         return RESET_TIMEDOUT;
3556                 }
3557
3558                 ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
3559         }
3560 }
3561
3562 static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info)
3563 {
3564         int rc;
3565         unsigned int delay_secs;
3566         enum pqi_soft_reset_status reset_status;
3567
3568         if (ctrl_info->soft_reset_handshake_supported)
3569                 reset_status = pqi_poll_for_soft_reset_status(ctrl_info);
3570         else
3571                 reset_status = RESET_INITIATE_FIRMWARE;
3572
3573         delay_secs = PQI_POST_RESET_DELAY_SECS;
3574
3575         switch (reset_status) {
3576         case RESET_TIMEDOUT:
3577                 delay_secs = PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS;
3578                 fallthrough;
3579         case RESET_INITIATE_DRIVER:
3580                 dev_info(&ctrl_info->pci_dev->dev,
3581                                 "Online Firmware Activation: resetting controller\n");
3582                 sis_soft_reset(ctrl_info);
3583                 fallthrough;
3584         case RESET_INITIATE_FIRMWARE:
3585                 ctrl_info->pqi_mode_enabled = false;
3586                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
3587                 rc = pqi_ofa_ctrl_restart(ctrl_info, delay_secs);
3588                 pqi_ofa_free_host_buffer(ctrl_info);
3589                 pqi_ctrl_ofa_done(ctrl_info);
3590                 dev_info(&ctrl_info->pci_dev->dev,
3591                                 "Online Firmware Activation: %s\n",
3592                                 rc == 0 ? "SUCCESS" : "FAILED");
3593                 break;
3594         case RESET_ABORT:
3595                 dev_info(&ctrl_info->pci_dev->dev,
3596                                 "Online Firmware Activation ABORTED\n");
3597                 if (ctrl_info->soft_reset_handshake_supported)
3598                         pqi_clear_soft_reset_status(ctrl_info);
3599                 pqi_ofa_free_host_buffer(ctrl_info);
3600                 pqi_ctrl_ofa_done(ctrl_info);
3601                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3602                 break;
3603         case RESET_NORESPONSE:
3604                 fallthrough;
3605         default:
3606                 dev_err(&ctrl_info->pci_dev->dev,
3607                         "unexpected Online Firmware Activation reset status: 0x%x\n",
3608                         reset_status);
3609                 pqi_ofa_free_host_buffer(ctrl_info);
3610                 pqi_ctrl_ofa_done(ctrl_info);
3611                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3612                 pqi_take_ctrl_offline(ctrl_info, PQI_OFA_RESPONSE_TIMEOUT);
3613                 break;
3614         }
3615 }
3616
3617 static void pqi_ofa_memory_alloc_worker(struct work_struct *work)
3618 {
3619         struct pqi_ctrl_info *ctrl_info;
3620
3621         ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_memory_alloc_work);
3622
3623         pqi_ctrl_ofa_start(ctrl_info);
3624         pqi_ofa_setup_host_buffer(ctrl_info);
3625         pqi_ofa_host_memory_update(ctrl_info);
3626 }
3627
3628 static void pqi_ofa_quiesce_worker(struct work_struct *work)
3629 {
3630         struct pqi_ctrl_info *ctrl_info;
3631         struct pqi_event *event;
3632
3633         ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_quiesce_work);
3634
3635         event = &ctrl_info->events[pqi_event_type_to_event_index(PQI_EVENT_TYPE_OFA)];
3636
3637         pqi_ofa_ctrl_quiesce(ctrl_info);
3638         pqi_acknowledge_event(ctrl_info, event);
3639         pqi_process_soft_reset(ctrl_info);
3640 }
3641
3642 static bool pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
3643         struct pqi_event *event)
3644 {
3645         bool ack_event;
3646
3647         ack_event = true;
3648
3649         switch (event->event_id) {
3650         case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3651                 dev_info(&ctrl_info->pci_dev->dev,
3652                         "received Online Firmware Activation memory allocation request\n");
3653                 schedule_work(&ctrl_info->ofa_memory_alloc_work);
3654                 break;
3655         case PQI_EVENT_OFA_QUIESCE:
3656                 dev_info(&ctrl_info->pci_dev->dev,
3657                         "received Online Firmware Activation quiesce request\n");
3658                 schedule_work(&ctrl_info->ofa_quiesce_work);
3659                 ack_event = false;
3660                 break;
3661         case PQI_EVENT_OFA_CANCELED:
3662                 dev_info(&ctrl_info->pci_dev->dev,
3663                         "received Online Firmware Activation cancel request: reason: %u\n",
3664                         ctrl_info->ofa_cancel_reason);
3665                 pqi_ofa_free_host_buffer(ctrl_info);
3666                 pqi_ctrl_ofa_done(ctrl_info);
3667                 break;
3668         default:
3669                 dev_err(&ctrl_info->pci_dev->dev,
3670                         "received unknown Online Firmware Activation request: event ID: %u\n",
3671                         event->event_id);
3672                 break;
3673         }
3674
3675         return ack_event;
3676 }
3677
3678 static void pqi_disable_raid_bypass(struct pqi_ctrl_info *ctrl_info)
3679 {
3680         unsigned long flags;
3681         struct pqi_scsi_dev *device;
3682
3683         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
3684
3685         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
3686                 if (device->raid_bypass_enabled)
3687                         device->raid_bypass_enabled = false;
3688
3689         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
3690 }
3691
3692 static void pqi_event_worker(struct work_struct *work)
3693 {
3694         unsigned int i;
3695         bool rescan_needed;
3696         struct pqi_ctrl_info *ctrl_info;
3697         struct pqi_event *event;
3698         bool ack_event;
3699
3700         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
3701
3702         pqi_ctrl_busy(ctrl_info);
3703         pqi_wait_if_ctrl_blocked(ctrl_info);
3704         if (pqi_ctrl_offline(ctrl_info))
3705                 goto out;
3706
3707         rescan_needed = false;
3708         event = ctrl_info->events;
3709         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
3710                 if (event->pending) {
3711                         event->pending = false;
3712                         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3713                                 ack_event = pqi_ofa_process_event(ctrl_info, event);
3714                         } else {
3715                                 ack_event = true;
3716                                 rescan_needed = true;
3717                                 if (event->event_type == PQI_EVENT_TYPE_LOGICAL_DEVICE)
3718                                         ctrl_info->logical_volume_rescan_needed = true;
3719                                 else if (event->event_type == PQI_EVENT_TYPE_AIO_STATE_CHANGE)
3720                                         pqi_disable_raid_bypass(ctrl_info);
3721                         }
3722                         if (ack_event)
3723                                 pqi_acknowledge_event(ctrl_info, event);
3724                 }
3725                 event++;
3726         }
3727
3728 #define PQI_RESCAN_WORK_FOR_EVENT_DELAY         (5 * HZ)
3729
3730         if (rescan_needed)
3731                 pqi_schedule_rescan_worker_with_delay(ctrl_info,
3732                         PQI_RESCAN_WORK_FOR_EVENT_DELAY);
3733
3734 out:
3735         pqi_ctrl_unbusy(ctrl_info);
3736 }
3737
3738 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * HZ)
3739
3740 static void pqi_heartbeat_timer_handler(struct timer_list *t)
3741 {
3742         int num_interrupts;
3743         u32 heartbeat_count;
3744         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t, heartbeat_timer);
3745
3746         pqi_check_ctrl_health(ctrl_info);
3747         if (pqi_ctrl_offline(ctrl_info))
3748                 return;
3749
3750         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
3751         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
3752
3753         if (num_interrupts == ctrl_info->previous_num_interrupts) {
3754                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
3755                         dev_err(&ctrl_info->pci_dev->dev,
3756                                 "no heartbeat detected - last heartbeat count: %u\n",
3757                                 heartbeat_count);
3758                         pqi_take_ctrl_offline(ctrl_info, PQI_NO_HEARTBEAT);
3759                         return;
3760                 }
3761         } else {
3762                 ctrl_info->previous_num_interrupts = num_interrupts;
3763         }
3764
3765         ctrl_info->previous_heartbeat_count = heartbeat_count;
3766         mod_timer(&ctrl_info->heartbeat_timer,
3767                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
3768 }
3769
3770 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3771 {
3772         if (!ctrl_info->heartbeat_counter)
3773                 return;
3774
3775         ctrl_info->previous_num_interrupts =
3776                 atomic_read(&ctrl_info->num_interrupts);
3777         ctrl_info->previous_heartbeat_count =
3778                 pqi_read_heartbeat_counter(ctrl_info);
3779
3780         ctrl_info->heartbeat_timer.expires =
3781                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
3782         add_timer(&ctrl_info->heartbeat_timer);
3783 }
3784
3785 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3786 {
3787         del_timer_sync(&ctrl_info->heartbeat_timer);
3788 }
3789
3790 static void pqi_ofa_capture_event_payload(struct pqi_ctrl_info *ctrl_info,
3791         struct pqi_event *event, struct pqi_event_response *response)
3792 {
3793         switch (event->event_id) {
3794         case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3795                 ctrl_info->ofa_bytes_requested =
3796                         get_unaligned_le32(&response->data.ofa_memory_allocation.bytes_requested);
3797                 break;
3798         case PQI_EVENT_OFA_CANCELED:
3799                 ctrl_info->ofa_cancel_reason =
3800                         get_unaligned_le16(&response->data.ofa_cancelled.reason);
3801                 break;
3802         }
3803 }
3804
3805 static int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
3806 {
3807         int num_events;
3808         pqi_index_t oq_pi;
3809         pqi_index_t oq_ci;
3810         struct pqi_event_queue *event_queue;
3811         struct pqi_event_response *response;
3812         struct pqi_event *event;
3813         int event_index;
3814
3815         event_queue = &ctrl_info->event_queue;
3816         num_events = 0;
3817         oq_ci = event_queue->oq_ci_copy;
3818
3819         while (1) {
3820                 oq_pi = readl(event_queue->oq_pi);
3821                 if (oq_pi >= PQI_NUM_EVENT_QUEUE_ELEMENTS) {
3822                         pqi_invalid_response(ctrl_info, PQI_EVENT_PI_OUT_OF_RANGE);
3823                         dev_err(&ctrl_info->pci_dev->dev,
3824                                 "event interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3825                                 oq_pi, PQI_NUM_EVENT_QUEUE_ELEMENTS - 1, oq_ci);
3826                         return -1;
3827                 }
3828
3829                 if (oq_pi == oq_ci)
3830                         break;
3831
3832                 num_events++;
3833                 response = event_queue->oq_element_array + (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
3834
3835                 event_index = pqi_event_type_to_event_index(response->event_type);
3836
3837                 if (event_index >= 0 && response->request_acknowledge) {
3838                         event = &ctrl_info->events[event_index];
3839                         event->pending = true;
3840                         event->event_type = response->event_type;
3841                         event->event_id = get_unaligned_le16(&response->event_id);
3842                         event->additional_event_id =
3843                                 get_unaligned_le32(&response->additional_event_id);
3844                         if (event->event_type == PQI_EVENT_TYPE_OFA)
3845                                 pqi_ofa_capture_event_payload(ctrl_info, event, response);
3846                 }
3847
3848                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
3849         }
3850
3851         if (num_events) {
3852                 event_queue->oq_ci_copy = oq_ci;
3853                 writel(oq_ci, event_queue->oq_ci);
3854                 schedule_work(&ctrl_info->event_work);
3855         }
3856
3857         return num_events;
3858 }
3859
3860 #define PQI_LEGACY_INTX_MASK    0x1
3861
3862 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info, bool enable_intx)
3863 {
3864         u32 intx_mask;
3865         struct pqi_device_registers __iomem *pqi_registers;
3866         volatile void __iomem *register_addr;
3867
3868         pqi_registers = ctrl_info->pqi_registers;
3869
3870         if (enable_intx)
3871                 register_addr = &pqi_registers->legacy_intx_mask_clear;
3872         else
3873                 register_addr = &pqi_registers->legacy_intx_mask_set;
3874
3875         intx_mask = readl(register_addr);
3876         intx_mask |= PQI_LEGACY_INTX_MASK;
3877         writel(intx_mask, register_addr);
3878 }
3879
3880 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3881         enum pqi_irq_mode new_mode)
3882 {
3883         switch (ctrl_info->irq_mode) {
3884         case IRQ_MODE_MSIX:
3885                 switch (new_mode) {
3886                 case IRQ_MODE_MSIX:
3887                         break;
3888                 case IRQ_MODE_INTX:
3889                         pqi_configure_legacy_intx(ctrl_info, true);
3890                         sis_enable_intx(ctrl_info);
3891                         break;
3892                 case IRQ_MODE_NONE:
3893                         break;
3894                 }
3895                 break;
3896         case IRQ_MODE_INTX:
3897                 switch (new_mode) {
3898                 case IRQ_MODE_MSIX:
3899                         pqi_configure_legacy_intx(ctrl_info, false);
3900                         sis_enable_msix(ctrl_info);
3901                         break;
3902                 case IRQ_MODE_INTX:
3903                         break;
3904                 case IRQ_MODE_NONE:
3905                         pqi_configure_legacy_intx(ctrl_info, false);
3906                         break;
3907                 }
3908                 break;
3909         case IRQ_MODE_NONE:
3910                 switch (new_mode) {
3911                 case IRQ_MODE_MSIX:
3912                         sis_enable_msix(ctrl_info);
3913                         break;
3914                 case IRQ_MODE_INTX:
3915                         pqi_configure_legacy_intx(ctrl_info, true);
3916                         sis_enable_intx(ctrl_info);
3917                         break;
3918                 case IRQ_MODE_NONE:
3919                         break;
3920                 }
3921                 break;
3922         }
3923
3924         ctrl_info->irq_mode = new_mode;
3925 }
3926
3927 #define PQI_LEGACY_INTX_PENDING         0x1
3928
3929 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3930 {
3931         bool valid_irq;
3932         u32 intx_status;
3933
3934         switch (ctrl_info->irq_mode) {
3935         case IRQ_MODE_MSIX:
3936                 valid_irq = true;
3937                 break;
3938         case IRQ_MODE_INTX:
3939                 intx_status = readl(&ctrl_info->pqi_registers->legacy_intx_status);
3940                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3941                         valid_irq = true;
3942                 else
3943                         valid_irq = false;
3944                 break;
3945         case IRQ_MODE_NONE:
3946         default:
3947                 valid_irq = false;
3948                 break;
3949         }
3950
3951         return valid_irq;
3952 }
3953
3954 static irqreturn_t pqi_irq_handler(int irq, void *data)
3955 {
3956         struct pqi_ctrl_info *ctrl_info;
3957         struct pqi_queue_group *queue_group;
3958         int num_io_responses_handled;
3959         int num_events_handled;
3960
3961         queue_group = data;
3962         ctrl_info = queue_group->ctrl_info;
3963
3964         if (!pqi_is_valid_irq(ctrl_info))
3965                 return IRQ_NONE;
3966
3967         num_io_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3968         if (num_io_responses_handled < 0)
3969                 goto out;
3970
3971         if (irq == ctrl_info->event_irq) {
3972                 num_events_handled = pqi_process_event_intr(ctrl_info);
3973                 if (num_events_handled < 0)
3974                         goto out;
3975         } else {
3976                 num_events_handled = 0;
3977         }
3978
3979         if (num_io_responses_handled + num_events_handled > 0)
3980                 atomic_inc(&ctrl_info->num_interrupts);
3981
3982         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3983         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3984
3985 out:
3986         return IRQ_HANDLED;
3987 }
3988
3989 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3990 {
3991         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3992         int i;
3993         int rc;
3994
3995         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3996
3997         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3998                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3999                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
4000                 if (rc) {
4001                         dev_err(&pci_dev->dev,
4002                                 "irq %u init failed with error %d\n",
4003                                 pci_irq_vector(pci_dev, i), rc);
4004                         return rc;
4005                 }
4006                 ctrl_info->num_msix_vectors_initialized++;
4007         }
4008
4009         return 0;
4010 }
4011
4012 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
4013 {
4014         int i;
4015
4016         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
4017                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
4018                         &ctrl_info->queue_groups[i]);
4019
4020         ctrl_info->num_msix_vectors_initialized = 0;
4021 }
4022
4023 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
4024 {
4025         int num_vectors_enabled;
4026         unsigned int flags = PCI_IRQ_MSIX;
4027
4028         if (!pqi_disable_managed_interrupts)
4029                 flags |= PCI_IRQ_AFFINITY;
4030
4031         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
4032                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
4033                         flags);
4034         if (num_vectors_enabled < 0) {
4035                 dev_err(&ctrl_info->pci_dev->dev,
4036                         "MSI-X init failed with error %d\n",
4037                         num_vectors_enabled);
4038                 return num_vectors_enabled;
4039         }
4040
4041         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
4042         ctrl_info->irq_mode = IRQ_MODE_MSIX;
4043         return 0;
4044 }
4045
4046 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
4047 {
4048         if (ctrl_info->num_msix_vectors_enabled) {
4049                 pci_free_irq_vectors(ctrl_info->pci_dev);
4050                 ctrl_info->num_msix_vectors_enabled = 0;
4051         }
4052 }
4053
4054 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
4055 {
4056         unsigned int i;
4057         size_t alloc_length;
4058         size_t element_array_length_per_iq;
4059         size_t element_array_length_per_oq;
4060         void *element_array;
4061         void __iomem *next_queue_index;
4062         void *aligned_pointer;
4063         unsigned int num_inbound_queues;
4064         unsigned int num_outbound_queues;
4065         unsigned int num_queue_indexes;
4066         struct pqi_queue_group *queue_group;
4067
4068         element_array_length_per_iq =
4069                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
4070                 ctrl_info->num_elements_per_iq;
4071         element_array_length_per_oq =
4072                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
4073                 ctrl_info->num_elements_per_oq;
4074         num_inbound_queues = ctrl_info->num_queue_groups * 2;
4075         num_outbound_queues = ctrl_info->num_queue_groups;
4076         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
4077
4078         aligned_pointer = NULL;
4079
4080         for (i = 0; i < num_inbound_queues; i++) {
4081                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4082                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4083                 aligned_pointer += element_array_length_per_iq;
4084         }
4085
4086         for (i = 0; i < num_outbound_queues; i++) {
4087                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4088                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4089                 aligned_pointer += element_array_length_per_oq;
4090         }
4091
4092         aligned_pointer = PTR_ALIGN(aligned_pointer,
4093                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4094         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
4095                 PQI_EVENT_OQ_ELEMENT_LENGTH;
4096
4097         for (i = 0; i < num_queue_indexes; i++) {
4098                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4099                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4100                 aligned_pointer += sizeof(pqi_index_t);
4101         }
4102
4103         alloc_length = (size_t)aligned_pointer +
4104                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4105
4106         alloc_length += PQI_EXTRA_SGL_MEMORY;
4107
4108         ctrl_info->queue_memory_base =
4109                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4110                                    &ctrl_info->queue_memory_base_dma_handle,
4111                                    GFP_KERNEL);
4112
4113         if (!ctrl_info->queue_memory_base)
4114                 return -ENOMEM;
4115
4116         ctrl_info->queue_memory_length = alloc_length;
4117
4118         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
4119                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4120
4121         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4122                 queue_group = &ctrl_info->queue_groups[i];
4123                 queue_group->iq_element_array[RAID_PATH] = element_array;
4124                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
4125                         ctrl_info->queue_memory_base_dma_handle +
4126                                 (element_array - ctrl_info->queue_memory_base);
4127                 element_array += element_array_length_per_iq;
4128                 element_array = PTR_ALIGN(element_array,
4129                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4130                 queue_group->iq_element_array[AIO_PATH] = element_array;
4131                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
4132                         ctrl_info->queue_memory_base_dma_handle +
4133                         (element_array - ctrl_info->queue_memory_base);
4134                 element_array += element_array_length_per_iq;
4135                 element_array = PTR_ALIGN(element_array,
4136                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4137         }
4138
4139         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4140                 queue_group = &ctrl_info->queue_groups[i];
4141                 queue_group->oq_element_array = element_array;
4142                 queue_group->oq_element_array_bus_addr =
4143                         ctrl_info->queue_memory_base_dma_handle +
4144                         (element_array - ctrl_info->queue_memory_base);
4145                 element_array += element_array_length_per_oq;
4146                 element_array = PTR_ALIGN(element_array,
4147                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4148         }
4149
4150         ctrl_info->event_queue.oq_element_array = element_array;
4151         ctrl_info->event_queue.oq_element_array_bus_addr =
4152                 ctrl_info->queue_memory_base_dma_handle +
4153                 (element_array - ctrl_info->queue_memory_base);
4154         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
4155                 PQI_EVENT_OQ_ELEMENT_LENGTH;
4156
4157         next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
4158                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
4159
4160         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4161                 queue_group = &ctrl_info->queue_groups[i];
4162                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
4163                 queue_group->iq_ci_bus_addr[RAID_PATH] =
4164                         ctrl_info->queue_memory_base_dma_handle +
4165                         (next_queue_index -
4166                         (void __iomem *)ctrl_info->queue_memory_base);
4167                 next_queue_index += sizeof(pqi_index_t);
4168                 next_queue_index = PTR_ALIGN(next_queue_index,
4169                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4170                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
4171                 queue_group->iq_ci_bus_addr[AIO_PATH] =
4172                         ctrl_info->queue_memory_base_dma_handle +
4173                         (next_queue_index -
4174                         (void __iomem *)ctrl_info->queue_memory_base);
4175                 next_queue_index += sizeof(pqi_index_t);
4176                 next_queue_index = PTR_ALIGN(next_queue_index,
4177                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4178                 queue_group->oq_pi = next_queue_index;
4179                 queue_group->oq_pi_bus_addr =
4180                         ctrl_info->queue_memory_base_dma_handle +
4181                         (next_queue_index -
4182                         (void __iomem *)ctrl_info->queue_memory_base);
4183                 next_queue_index += sizeof(pqi_index_t);
4184                 next_queue_index = PTR_ALIGN(next_queue_index,
4185                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4186         }
4187
4188         ctrl_info->event_queue.oq_pi = next_queue_index;
4189         ctrl_info->event_queue.oq_pi_bus_addr =
4190                 ctrl_info->queue_memory_base_dma_handle +
4191                 (next_queue_index -
4192                 (void __iomem *)ctrl_info->queue_memory_base);
4193
4194         return 0;
4195 }
4196
4197 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
4198 {
4199         unsigned int i;
4200         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
4201         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
4202
4203         /*
4204          * Initialize the backpointers to the controller structure in
4205          * each operational queue group structure.
4206          */
4207         for (i = 0; i < ctrl_info->num_queue_groups; i++)
4208                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
4209
4210         /*
4211          * Assign IDs to all operational queues.  Note that the IDs
4212          * assigned to operational IQs are independent of the IDs
4213          * assigned to operational OQs.
4214          */
4215         ctrl_info->event_queue.oq_id = next_oq_id++;
4216         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4217                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
4218                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
4219                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
4220         }
4221
4222         /*
4223          * Assign MSI-X table entry indexes to all queues.  Note that the
4224          * interrupt for the event queue is shared with the first queue group.
4225          */
4226         ctrl_info->event_queue.int_msg_num = 0;
4227         for (i = 0; i < ctrl_info->num_queue_groups; i++)
4228                 ctrl_info->queue_groups[i].int_msg_num = i;
4229
4230         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4231                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
4232                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
4233                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
4234                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
4235         }
4236 }
4237
4238 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
4239 {
4240         size_t alloc_length;
4241         struct pqi_admin_queues_aligned *admin_queues_aligned;
4242         struct pqi_admin_queues *admin_queues;
4243
4244         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
4245                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4246
4247         ctrl_info->admin_queue_memory_base =
4248                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4249                                    &ctrl_info->admin_queue_memory_base_dma_handle,
4250                                    GFP_KERNEL);
4251
4252         if (!ctrl_info->admin_queue_memory_base)
4253                 return -ENOMEM;
4254
4255         ctrl_info->admin_queue_memory_length = alloc_length;
4256
4257         admin_queues = &ctrl_info->admin_queues;
4258         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
4259                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4260         admin_queues->iq_element_array =
4261                 &admin_queues_aligned->iq_element_array;
4262         admin_queues->oq_element_array =
4263                 &admin_queues_aligned->oq_element_array;
4264         admin_queues->iq_ci =
4265                 (pqi_index_t __iomem *)&admin_queues_aligned->iq_ci;
4266         admin_queues->oq_pi =
4267                 (pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
4268
4269         admin_queues->iq_element_array_bus_addr =
4270                 ctrl_info->admin_queue_memory_base_dma_handle +
4271                 (admin_queues->iq_element_array -
4272                 ctrl_info->admin_queue_memory_base);
4273         admin_queues->oq_element_array_bus_addr =
4274                 ctrl_info->admin_queue_memory_base_dma_handle +
4275                 (admin_queues->oq_element_array -
4276                 ctrl_info->admin_queue_memory_base);
4277         admin_queues->iq_ci_bus_addr =
4278                 ctrl_info->admin_queue_memory_base_dma_handle +
4279                 ((void __iomem *)admin_queues->iq_ci -
4280                 (void __iomem *)ctrl_info->admin_queue_memory_base);
4281         admin_queues->oq_pi_bus_addr =
4282                 ctrl_info->admin_queue_memory_base_dma_handle +
4283                 ((void __iomem *)admin_queues->oq_pi -
4284                 (void __iomem *)ctrl_info->admin_queue_memory_base);
4285
4286         return 0;
4287 }
4288
4289 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          HZ
4290 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
4291
4292 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
4293 {
4294         struct pqi_device_registers __iomem *pqi_registers;
4295         struct pqi_admin_queues *admin_queues;
4296         unsigned long timeout;
4297         u8 status;
4298         u32 reg;
4299
4300         pqi_registers = ctrl_info->pqi_registers;
4301         admin_queues = &ctrl_info->admin_queues;
4302
4303         writeq((u64)admin_queues->iq_element_array_bus_addr,
4304                 &pqi_registers->admin_iq_element_array_addr);
4305         writeq((u64)admin_queues->oq_element_array_bus_addr,
4306                 &pqi_registers->admin_oq_element_array_addr);
4307         writeq((u64)admin_queues->iq_ci_bus_addr,
4308                 &pqi_registers->admin_iq_ci_addr);
4309         writeq((u64)admin_queues->oq_pi_bus_addr,
4310                 &pqi_registers->admin_oq_pi_addr);
4311
4312         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
4313                 (PQI_ADMIN_OQ_NUM_ELEMENTS << 8) |
4314                 (admin_queues->int_msg_num << 16);
4315         writel(reg, &pqi_registers->admin_iq_num_elements);
4316
4317         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
4318                 &pqi_registers->function_and_status_code);
4319
4320         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
4321         while (1) {
4322                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
4323                 status = readb(&pqi_registers->function_and_status_code);
4324                 if (status == PQI_STATUS_IDLE)
4325                         break;
4326                 if (time_after(jiffies, timeout))
4327                         return -ETIMEDOUT;
4328         }
4329
4330         /*
4331          * The offset registers are not initialized to the correct
4332          * offsets until *after* the create admin queue pair command
4333          * completes successfully.
4334          */
4335         admin_queues->iq_pi = ctrl_info->iomem_base +
4336                 PQI_DEVICE_REGISTERS_OFFSET +
4337                 readq(&pqi_registers->admin_iq_pi_offset);
4338         admin_queues->oq_ci = ctrl_info->iomem_base +
4339                 PQI_DEVICE_REGISTERS_OFFSET +
4340                 readq(&pqi_registers->admin_oq_ci_offset);
4341
4342         return 0;
4343 }
4344
4345 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
4346         struct pqi_general_admin_request *request)
4347 {
4348         struct pqi_admin_queues *admin_queues;
4349         void *next_element;
4350         pqi_index_t iq_pi;
4351
4352         admin_queues = &ctrl_info->admin_queues;
4353         iq_pi = admin_queues->iq_pi_copy;
4354
4355         next_element = admin_queues->iq_element_array +
4356                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
4357
4358         memcpy(next_element, request, sizeof(*request));
4359
4360         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
4361         admin_queues->iq_pi_copy = iq_pi;
4362
4363         /*
4364          * This write notifies the controller that an IU is available to be
4365          * processed.
4366          */
4367         writel(iq_pi, admin_queues->iq_pi);
4368 }
4369
4370 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
4371
4372 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
4373         struct pqi_general_admin_response *response)
4374 {
4375         struct pqi_admin_queues *admin_queues;
4376         pqi_index_t oq_pi;
4377         pqi_index_t oq_ci;
4378         unsigned long timeout;
4379
4380         admin_queues = &ctrl_info->admin_queues;
4381         oq_ci = admin_queues->oq_ci_copy;
4382
4383         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
4384
4385         while (1) {
4386                 oq_pi = readl(admin_queues->oq_pi);
4387                 if (oq_pi != oq_ci)
4388                         break;
4389                 if (time_after(jiffies, timeout)) {
4390                         dev_err(&ctrl_info->pci_dev->dev,
4391                                 "timed out waiting for admin response\n");
4392                         return -ETIMEDOUT;
4393                 }
4394                 if (!sis_is_firmware_running(ctrl_info))
4395                         return -ENXIO;
4396                 usleep_range(1000, 2000);
4397         }
4398
4399         memcpy(response, admin_queues->oq_element_array +
4400                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
4401
4402         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
4403         admin_queues->oq_ci_copy = oq_ci;
4404         writel(oq_ci, admin_queues->oq_ci);
4405
4406         return 0;
4407 }
4408
4409 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
4410         struct pqi_queue_group *queue_group, enum pqi_io_path path,
4411         struct pqi_io_request *io_request)
4412 {
4413         struct pqi_io_request *next;
4414         void *next_element;
4415         pqi_index_t iq_pi;
4416         pqi_index_t iq_ci;
4417         size_t iu_length;
4418         unsigned long flags;
4419         unsigned int num_elements_needed;
4420         unsigned int num_elements_to_end_of_queue;
4421         size_t copy_count;
4422         struct pqi_iu_header *request;
4423
4424         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
4425
4426         if (io_request) {
4427                 io_request->queue_group = queue_group;
4428                 list_add_tail(&io_request->request_list_entry,
4429                         &queue_group->request_list[path]);
4430         }
4431
4432         iq_pi = queue_group->iq_pi_copy[path];
4433
4434         list_for_each_entry_safe(io_request, next,
4435                 &queue_group->request_list[path], request_list_entry) {
4436
4437                 request = io_request->iu;
4438
4439                 iu_length = get_unaligned_le16(&request->iu_length) +
4440                         PQI_REQUEST_HEADER_LENGTH;
4441                 num_elements_needed =
4442                         DIV_ROUND_UP(iu_length,
4443                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4444
4445                 iq_ci = readl(queue_group->iq_ci[path]);
4446
4447                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
4448                         ctrl_info->num_elements_per_iq))
4449                         break;
4450
4451                 put_unaligned_le16(queue_group->oq_id,
4452                         &request->response_queue_id);
4453
4454                 next_element = queue_group->iq_element_array[path] +
4455                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4456
4457                 num_elements_to_end_of_queue =
4458                         ctrl_info->num_elements_per_iq - iq_pi;
4459
4460                 if (num_elements_needed <= num_elements_to_end_of_queue) {
4461                         memcpy(next_element, request, iu_length);
4462                 } else {
4463                         copy_count = num_elements_to_end_of_queue *
4464                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4465                         memcpy(next_element, request, copy_count);
4466                         memcpy(queue_group->iq_element_array[path],
4467                                 (u8 *)request + copy_count,
4468                                 iu_length - copy_count);
4469                 }
4470
4471                 iq_pi = (iq_pi + num_elements_needed) %
4472                         ctrl_info->num_elements_per_iq;
4473
4474                 list_del(&io_request->request_list_entry);
4475         }
4476
4477         if (iq_pi != queue_group->iq_pi_copy[path]) {
4478                 queue_group->iq_pi_copy[path] = iq_pi;
4479                 /*
4480                  * This write notifies the controller that one or more IUs are
4481                  * available to be processed.
4482                  */
4483                 writel(iq_pi, queue_group->iq_pi[path]);
4484         }
4485
4486         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
4487 }
4488
4489 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
4490
4491 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
4492         struct completion *wait)
4493 {
4494         int rc;
4495
4496         while (1) {
4497                 if (wait_for_completion_io_timeout(wait,
4498                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
4499                         rc = 0;
4500                         break;
4501                 }
4502
4503                 pqi_check_ctrl_health(ctrl_info);
4504                 if (pqi_ctrl_offline(ctrl_info)) {
4505                         rc = -ENXIO;
4506                         break;
4507                 }
4508         }
4509
4510         return rc;
4511 }
4512
4513 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
4514         void *context)
4515 {
4516         struct completion *waiting = context;
4517
4518         complete(waiting);
4519 }
4520
4521 static int pqi_process_raid_io_error_synchronous(
4522         struct pqi_raid_error_info *error_info)
4523 {
4524         int rc = -EIO;
4525
4526         switch (error_info->data_out_result) {
4527         case PQI_DATA_IN_OUT_GOOD:
4528                 if (error_info->status == SAM_STAT_GOOD)
4529                         rc = 0;
4530                 break;
4531         case PQI_DATA_IN_OUT_UNDERFLOW:
4532                 if (error_info->status == SAM_STAT_GOOD ||
4533                         error_info->status == SAM_STAT_CHECK_CONDITION)
4534                         rc = 0;
4535                 break;
4536         case PQI_DATA_IN_OUT_ABORTED:
4537                 rc = PQI_CMD_STATUS_ABORTED;
4538                 break;
4539         }
4540
4541         return rc;
4542 }
4543
4544 static inline bool pqi_is_blockable_request(struct pqi_iu_header *request)
4545 {
4546         return (request->driver_flags & PQI_DRIVER_NONBLOCKABLE_REQUEST) == 0;
4547 }
4548
4549 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
4550         struct pqi_iu_header *request, unsigned int flags,
4551         struct pqi_raid_error_info *error_info)
4552 {
4553         int rc = 0;
4554         struct pqi_io_request *io_request;
4555         size_t iu_length;
4556         DECLARE_COMPLETION_ONSTACK(wait);
4557
4558         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
4559                 if (down_interruptible(&ctrl_info->sync_request_sem))
4560                         return -ERESTARTSYS;
4561         } else {
4562                 down(&ctrl_info->sync_request_sem);
4563         }
4564
4565         pqi_ctrl_busy(ctrl_info);
4566         /*
4567          * Wait for other admin queue updates such as;
4568          * config table changes, OFA memory updates, ...
4569          */
4570         if (pqi_is_blockable_request(request))
4571                 pqi_wait_if_ctrl_blocked(ctrl_info);
4572
4573         if (pqi_ctrl_offline(ctrl_info)) {
4574                 rc = -ENXIO;
4575                 goto out;
4576         }
4577
4578         io_request = pqi_alloc_io_request(ctrl_info, NULL);
4579
4580         put_unaligned_le16(io_request->index,
4581                 &(((struct pqi_raid_path_request *)request)->request_id));
4582
4583         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
4584                 ((struct pqi_raid_path_request *)request)->error_index =
4585                         ((struct pqi_raid_path_request *)request)->request_id;
4586
4587         iu_length = get_unaligned_le16(&request->iu_length) +
4588                 PQI_REQUEST_HEADER_LENGTH;
4589         memcpy(io_request->iu, request, iu_length);
4590
4591         io_request->io_complete_callback = pqi_raid_synchronous_complete;
4592         io_request->context = &wait;
4593
4594         pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4595                 io_request);
4596
4597         pqi_wait_for_completion_io(ctrl_info, &wait);
4598
4599         if (error_info) {
4600                 if (io_request->error_info)
4601                         memcpy(error_info, io_request->error_info, sizeof(*error_info));
4602                 else
4603                         memset(error_info, 0, sizeof(*error_info));
4604         } else if (rc == 0 && io_request->error_info) {
4605                 rc = pqi_process_raid_io_error_synchronous(io_request->error_info);
4606         }
4607
4608         pqi_free_io_request(io_request);
4609
4610 out:
4611         pqi_ctrl_unbusy(ctrl_info);
4612         up(&ctrl_info->sync_request_sem);
4613
4614         return rc;
4615 }
4616
4617 static int pqi_validate_admin_response(
4618         struct pqi_general_admin_response *response, u8 expected_function_code)
4619 {
4620         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
4621                 return -EINVAL;
4622
4623         if (get_unaligned_le16(&response->header.iu_length) !=
4624                 PQI_GENERAL_ADMIN_IU_LENGTH)
4625                 return -EINVAL;
4626
4627         if (response->function_code != expected_function_code)
4628                 return -EINVAL;
4629
4630         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
4631                 return -EINVAL;
4632
4633         return 0;
4634 }
4635
4636 static int pqi_submit_admin_request_synchronous(
4637         struct pqi_ctrl_info *ctrl_info,
4638         struct pqi_general_admin_request *request,
4639         struct pqi_general_admin_response *response)
4640 {
4641         int rc;
4642
4643         pqi_submit_admin_request(ctrl_info, request);
4644
4645         rc = pqi_poll_for_admin_response(ctrl_info, response);
4646
4647         if (rc == 0)
4648                 rc = pqi_validate_admin_response(response, request->function_code);
4649
4650         return rc;
4651 }
4652
4653 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
4654 {
4655         int rc;
4656         struct pqi_general_admin_request request;
4657         struct pqi_general_admin_response response;
4658         struct pqi_device_capability *capability;
4659         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
4660
4661         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
4662         if (!capability)
4663                 return -ENOMEM;
4664
4665         memset(&request, 0, sizeof(request));
4666
4667         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4668         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4669                 &request.header.iu_length);
4670         request.function_code =
4671                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
4672         put_unaligned_le32(sizeof(*capability),
4673                 &request.data.report_device_capability.buffer_length);
4674
4675         rc = pqi_map_single(ctrl_info->pci_dev,
4676                 &request.data.report_device_capability.sg_descriptor,
4677                 capability, sizeof(*capability),
4678                 DMA_FROM_DEVICE);
4679         if (rc)
4680                 goto out;
4681
4682         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, &response);
4683
4684         pqi_pci_unmap(ctrl_info->pci_dev,
4685                 &request.data.report_device_capability.sg_descriptor, 1,
4686                 DMA_FROM_DEVICE);
4687
4688         if (rc)
4689                 goto out;
4690
4691         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
4692                 rc = -EIO;
4693                 goto out;
4694         }
4695
4696         ctrl_info->max_inbound_queues =
4697                 get_unaligned_le16(&capability->max_inbound_queues);
4698         ctrl_info->max_elements_per_iq =
4699                 get_unaligned_le16(&capability->max_elements_per_iq);
4700         ctrl_info->max_iq_element_length =
4701                 get_unaligned_le16(&capability->max_iq_element_length)
4702                 * 16;
4703         ctrl_info->max_outbound_queues =
4704                 get_unaligned_le16(&capability->max_outbound_queues);
4705         ctrl_info->max_elements_per_oq =
4706                 get_unaligned_le16(&capability->max_elements_per_oq);
4707         ctrl_info->max_oq_element_length =
4708                 get_unaligned_le16(&capability->max_oq_element_length)
4709                 * 16;
4710
4711         sop_iu_layer_descriptor =
4712                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
4713
4714         ctrl_info->max_inbound_iu_length_per_firmware =
4715                 get_unaligned_le16(
4716                         &sop_iu_layer_descriptor->max_inbound_iu_length);
4717         ctrl_info->inbound_spanning_supported =
4718                 sop_iu_layer_descriptor->inbound_spanning_supported;
4719         ctrl_info->outbound_spanning_supported =
4720                 sop_iu_layer_descriptor->outbound_spanning_supported;
4721
4722 out:
4723         kfree(capability);
4724
4725         return rc;
4726 }
4727
4728 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
4729 {
4730         if (ctrl_info->max_iq_element_length <
4731                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4732                 dev_err(&ctrl_info->pci_dev->dev,
4733                         "max. inbound queue element length of %d is less than the required length of %d\n",
4734                         ctrl_info->max_iq_element_length,
4735                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4736                 return -EINVAL;
4737         }
4738
4739         if (ctrl_info->max_oq_element_length <
4740                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
4741                 dev_err(&ctrl_info->pci_dev->dev,
4742                         "max. outbound queue element length of %d is less than the required length of %d\n",
4743                         ctrl_info->max_oq_element_length,
4744                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
4745                 return -EINVAL;
4746         }
4747
4748         if (ctrl_info->max_inbound_iu_length_per_firmware <
4749                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4750                 dev_err(&ctrl_info->pci_dev->dev,
4751                         "max. inbound IU length of %u is less than the min. required length of %d\n",
4752                         ctrl_info->max_inbound_iu_length_per_firmware,
4753                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4754                 return -EINVAL;
4755         }
4756
4757         if (!ctrl_info->inbound_spanning_supported) {
4758                 dev_err(&ctrl_info->pci_dev->dev,
4759                         "the controller does not support inbound spanning\n");
4760                 return -EINVAL;
4761         }
4762
4763         if (ctrl_info->outbound_spanning_supported) {
4764                 dev_err(&ctrl_info->pci_dev->dev,
4765                         "the controller supports outbound spanning but this driver does not\n");
4766                 return -EINVAL;
4767         }
4768
4769         return 0;
4770 }
4771
4772 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
4773 {
4774         int rc;
4775         struct pqi_event_queue *event_queue;
4776         struct pqi_general_admin_request request;
4777         struct pqi_general_admin_response response;
4778
4779         event_queue = &ctrl_info->event_queue;
4780
4781         /*
4782          * Create OQ (Outbound Queue - device to host queue) to dedicate
4783          * to events.
4784          */
4785         memset(&request, 0, sizeof(request));
4786         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4787         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4788                 &request.header.iu_length);
4789         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4790         put_unaligned_le16(event_queue->oq_id,
4791                 &request.data.create_operational_oq.queue_id);
4792         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
4793                 &request.data.create_operational_oq.element_array_addr);
4794         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
4795                 &request.data.create_operational_oq.pi_addr);
4796         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
4797                 &request.data.create_operational_oq.num_elements);
4798         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
4799                 &request.data.create_operational_oq.element_length);
4800         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4801         put_unaligned_le16(event_queue->int_msg_num,
4802                 &request.data.create_operational_oq.int_msg_num);
4803
4804         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4805                 &response);
4806         if (rc)
4807                 return rc;
4808
4809         event_queue->oq_ci = ctrl_info->iomem_base +
4810                 PQI_DEVICE_REGISTERS_OFFSET +
4811                 get_unaligned_le64(
4812                         &response.data.create_operational_oq.oq_ci_offset);
4813
4814         return 0;
4815 }
4816
4817 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
4818         unsigned int group_number)
4819 {
4820         int rc;
4821         struct pqi_queue_group *queue_group;
4822         struct pqi_general_admin_request request;
4823         struct pqi_general_admin_response response;
4824
4825         queue_group = &ctrl_info->queue_groups[group_number];
4826
4827         /*
4828          * Create IQ (Inbound Queue - host to device queue) for
4829          * RAID path.
4830          */
4831         memset(&request, 0, sizeof(request));
4832         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4833         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4834                 &request.header.iu_length);
4835         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4836         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4837                 &request.data.create_operational_iq.queue_id);
4838         put_unaligned_le64(
4839                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4840                 &request.data.create_operational_iq.element_array_addr);
4841         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4842                 &request.data.create_operational_iq.ci_addr);
4843         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4844                 &request.data.create_operational_iq.num_elements);
4845         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4846                 &request.data.create_operational_iq.element_length);
4847         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4848
4849         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4850                 &response);
4851         if (rc) {
4852                 dev_err(&ctrl_info->pci_dev->dev,
4853                         "error creating inbound RAID queue\n");
4854                 return rc;
4855         }
4856
4857         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4858                 PQI_DEVICE_REGISTERS_OFFSET +
4859                 get_unaligned_le64(
4860                         &response.data.create_operational_iq.iq_pi_offset);
4861
4862         /*
4863          * Create IQ (Inbound Queue - host to device queue) for
4864          * Advanced I/O (AIO) path.
4865          */
4866         memset(&request, 0, sizeof(request));
4867         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4868         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4869                 &request.header.iu_length);
4870         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4871         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4872                 &request.data.create_operational_iq.queue_id);
4873         put_unaligned_le64((u64)queue_group->
4874                 iq_element_array_bus_addr[AIO_PATH],
4875                 &request.data.create_operational_iq.element_array_addr);
4876         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4877                 &request.data.create_operational_iq.ci_addr);
4878         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4879                 &request.data.create_operational_iq.num_elements);
4880         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4881                 &request.data.create_operational_iq.element_length);
4882         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4883
4884         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4885                 &response);
4886         if (rc) {
4887                 dev_err(&ctrl_info->pci_dev->dev,
4888                         "error creating inbound AIO queue\n");
4889                 return rc;
4890         }
4891
4892         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4893                 PQI_DEVICE_REGISTERS_OFFSET +
4894                 get_unaligned_le64(
4895                         &response.data.create_operational_iq.iq_pi_offset);
4896
4897         /*
4898          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4899          * assumed to be for RAID path I/O unless we change the queue's
4900          * property.
4901          */
4902         memset(&request, 0, sizeof(request));
4903         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4904         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4905                 &request.header.iu_length);
4906         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4907         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4908                 &request.data.change_operational_iq_properties.queue_id);
4909         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4910                 &request.data.change_operational_iq_properties.vendor_specific);
4911
4912         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4913                 &response);
4914         if (rc) {
4915                 dev_err(&ctrl_info->pci_dev->dev,
4916                         "error changing queue property\n");
4917                 return rc;
4918         }
4919
4920         /*
4921          * Create OQ (Outbound Queue - device to host queue).
4922          */
4923         memset(&request, 0, sizeof(request));
4924         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4925         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4926                 &request.header.iu_length);
4927         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4928         put_unaligned_le16(queue_group->oq_id,
4929                 &request.data.create_operational_oq.queue_id);
4930         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4931                 &request.data.create_operational_oq.element_array_addr);
4932         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4933                 &request.data.create_operational_oq.pi_addr);
4934         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4935                 &request.data.create_operational_oq.num_elements);
4936         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4937                 &request.data.create_operational_oq.element_length);
4938         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4939         put_unaligned_le16(queue_group->int_msg_num,
4940                 &request.data.create_operational_oq.int_msg_num);
4941
4942         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4943                 &response);
4944         if (rc) {
4945                 dev_err(&ctrl_info->pci_dev->dev,
4946                         "error creating outbound queue\n");
4947                 return rc;
4948         }
4949
4950         queue_group->oq_ci = ctrl_info->iomem_base +
4951                 PQI_DEVICE_REGISTERS_OFFSET +
4952                 get_unaligned_le64(
4953                         &response.data.create_operational_oq.oq_ci_offset);
4954
4955         return 0;
4956 }
4957
4958 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4959 {
4960         int rc;
4961         unsigned int i;
4962
4963         rc = pqi_create_event_queue(ctrl_info);
4964         if (rc) {
4965                 dev_err(&ctrl_info->pci_dev->dev,
4966                         "error creating event queue\n");
4967                 return rc;
4968         }
4969
4970         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4971                 rc = pqi_create_queue_group(ctrl_info, i);
4972                 if (rc) {
4973                         dev_err(&ctrl_info->pci_dev->dev,
4974                                 "error creating queue group number %u/%u\n",
4975                                 i, ctrl_info->num_queue_groups);
4976                         return rc;
4977                 }
4978         }
4979
4980         return 0;
4981 }
4982
4983 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4984         struct_size((struct pqi_event_config *)0, descriptors, PQI_MAX_EVENT_DESCRIPTORS)
4985
4986 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4987         bool enable_events)
4988 {
4989         int rc;
4990         unsigned int i;
4991         struct pqi_event_config *event_config;
4992         struct pqi_event_descriptor *event_descriptor;
4993         struct pqi_general_management_request request;
4994
4995         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4996                 GFP_KERNEL);
4997         if (!event_config)
4998                 return -ENOMEM;
4999
5000         memset(&request, 0, sizeof(request));
5001
5002         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
5003         put_unaligned_le16(offsetof(struct pqi_general_management_request,
5004                 data.report_event_configuration.sg_descriptors[1]) -
5005                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
5006         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5007                 &request.data.report_event_configuration.buffer_length);
5008
5009         rc = pqi_map_single(ctrl_info->pci_dev,
5010                 request.data.report_event_configuration.sg_descriptors,
5011                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5012                 DMA_FROM_DEVICE);
5013         if (rc)
5014                 goto out;
5015
5016         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
5017
5018         pqi_pci_unmap(ctrl_info->pci_dev,
5019                 request.data.report_event_configuration.sg_descriptors, 1,
5020                 DMA_FROM_DEVICE);
5021
5022         if (rc)
5023                 goto out;
5024
5025         for (i = 0; i < event_config->num_event_descriptors; i++) {
5026                 event_descriptor = &event_config->descriptors[i];
5027                 if (enable_events &&
5028                         pqi_is_supported_event(event_descriptor->event_type))
5029                                 put_unaligned_le16(ctrl_info->event_queue.oq_id,
5030                                         &event_descriptor->oq_id);
5031                 else
5032                         put_unaligned_le16(0, &event_descriptor->oq_id);
5033         }
5034
5035         memset(&request, 0, sizeof(request));
5036
5037         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
5038         put_unaligned_le16(offsetof(struct pqi_general_management_request,
5039                 data.report_event_configuration.sg_descriptors[1]) -
5040                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
5041         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5042                 &request.data.report_event_configuration.buffer_length);
5043
5044         rc = pqi_map_single(ctrl_info->pci_dev,
5045                 request.data.report_event_configuration.sg_descriptors,
5046                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5047                 DMA_TO_DEVICE);
5048         if (rc)
5049                 goto out;
5050
5051         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
5052
5053         pqi_pci_unmap(ctrl_info->pci_dev,
5054                 request.data.report_event_configuration.sg_descriptors, 1,
5055                 DMA_TO_DEVICE);
5056
5057 out:
5058         kfree(event_config);
5059
5060         return rc;
5061 }
5062
5063 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
5064 {
5065         return pqi_configure_events(ctrl_info, true);
5066 }
5067
5068 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
5069 {
5070         unsigned int i;
5071         struct device *dev;
5072         size_t sg_chain_buffer_length;
5073         struct pqi_io_request *io_request;
5074
5075         if (!ctrl_info->io_request_pool)
5076                 return;
5077
5078         dev = &ctrl_info->pci_dev->dev;
5079         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
5080         io_request = ctrl_info->io_request_pool;
5081
5082         for (i = 0; i < ctrl_info->max_io_slots; i++) {
5083                 kfree(io_request->iu);
5084                 if (!io_request->sg_chain_buffer)
5085                         break;
5086                 dma_free_coherent(dev, sg_chain_buffer_length,
5087                         io_request->sg_chain_buffer,
5088                         io_request->sg_chain_buffer_dma_handle);
5089                 io_request++;
5090         }
5091
5092         kfree(ctrl_info->io_request_pool);
5093         ctrl_info->io_request_pool = NULL;
5094 }
5095
5096 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
5097 {
5098         ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
5099                                      ctrl_info->error_buffer_length,
5100                                      &ctrl_info->error_buffer_dma_handle,
5101                                      GFP_KERNEL);
5102         if (!ctrl_info->error_buffer)
5103                 return -ENOMEM;
5104
5105         return 0;
5106 }
5107
5108 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
5109 {
5110         unsigned int i;
5111         void *sg_chain_buffer;
5112         size_t sg_chain_buffer_length;
5113         dma_addr_t sg_chain_buffer_dma_handle;
5114         struct device *dev;
5115         struct pqi_io_request *io_request;
5116
5117         ctrl_info->io_request_pool = kcalloc(ctrl_info->max_io_slots,
5118                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
5119
5120         if (!ctrl_info->io_request_pool) {
5121                 dev_err(&ctrl_info->pci_dev->dev,
5122                         "failed to allocate I/O request pool\n");
5123                 goto error;
5124         }
5125
5126         dev = &ctrl_info->pci_dev->dev;
5127         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
5128         io_request = ctrl_info->io_request_pool;
5129
5130         for (i = 0; i < ctrl_info->max_io_slots; i++) {
5131                 io_request->iu = kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
5132
5133                 if (!io_request->iu) {
5134                         dev_err(&ctrl_info->pci_dev->dev,
5135                                 "failed to allocate IU buffers\n");
5136                         goto error;
5137                 }
5138
5139                 sg_chain_buffer = dma_alloc_coherent(dev,
5140                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
5141                         GFP_KERNEL);
5142
5143                 if (!sg_chain_buffer) {
5144                         dev_err(&ctrl_info->pci_dev->dev,
5145                                 "failed to allocate PQI scatter-gather chain buffers\n");
5146                         goto error;
5147                 }
5148
5149                 io_request->index = i;
5150                 io_request->sg_chain_buffer = sg_chain_buffer;
5151                 io_request->sg_chain_buffer_dma_handle = sg_chain_buffer_dma_handle;
5152                 io_request++;
5153         }
5154
5155         return 0;
5156
5157 error:
5158         pqi_free_all_io_requests(ctrl_info);
5159
5160         return -ENOMEM;
5161 }
5162
5163 /*
5164  * Calculate required resources that are sized based on max. outstanding
5165  * requests and max. transfer size.
5166  */
5167
5168 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
5169 {
5170         u32 max_transfer_size;
5171         u32 max_sg_entries;
5172
5173         ctrl_info->scsi_ml_can_queue =
5174                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
5175         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
5176
5177         ctrl_info->error_buffer_length =
5178                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
5179
5180         if (reset_devices)
5181                 max_transfer_size = min(ctrl_info->max_transfer_size,
5182                         PQI_MAX_TRANSFER_SIZE_KDUMP);
5183         else
5184                 max_transfer_size = min(ctrl_info->max_transfer_size,
5185                         PQI_MAX_TRANSFER_SIZE);
5186
5187         max_sg_entries = max_transfer_size / PAGE_SIZE;
5188
5189         /* +1 to cover when the buffer is not page-aligned. */
5190         max_sg_entries++;
5191
5192         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
5193
5194         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
5195
5196         ctrl_info->sg_chain_buffer_length =
5197                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
5198                 PQI_EXTRA_SGL_MEMORY;
5199         ctrl_info->sg_tablesize = max_sg_entries;
5200         ctrl_info->max_sectors = max_transfer_size / 512;
5201 }
5202
5203 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
5204 {
5205         int num_queue_groups;
5206         u16 num_elements_per_iq;
5207         u16 num_elements_per_oq;
5208
5209         if (reset_devices) {
5210                 num_queue_groups = 1;
5211         } else {
5212                 int num_cpus;
5213                 int max_queue_groups;
5214
5215                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
5216                         ctrl_info->max_outbound_queues - 1);
5217                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
5218
5219                 num_cpus = num_online_cpus();
5220                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
5221                 num_queue_groups = min(num_queue_groups, max_queue_groups);
5222         }
5223
5224         ctrl_info->num_queue_groups = num_queue_groups;
5225
5226         /*
5227          * Make sure that the max. inbound IU length is an even multiple
5228          * of our inbound element length.
5229          */
5230         ctrl_info->max_inbound_iu_length =
5231                 (ctrl_info->max_inbound_iu_length_per_firmware /
5232                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
5233                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
5234
5235         num_elements_per_iq =
5236                 (ctrl_info->max_inbound_iu_length /
5237                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
5238
5239         /* Add one because one element in each queue is unusable. */
5240         num_elements_per_iq++;
5241
5242         num_elements_per_iq = min(num_elements_per_iq,
5243                 ctrl_info->max_elements_per_iq);
5244
5245         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
5246         num_elements_per_oq = min(num_elements_per_oq,
5247                 ctrl_info->max_elements_per_oq);
5248
5249         ctrl_info->num_elements_per_iq = num_elements_per_iq;
5250         ctrl_info->num_elements_per_oq = num_elements_per_oq;
5251
5252         ctrl_info->max_sg_per_iu =
5253                 ((ctrl_info->max_inbound_iu_length -
5254                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5255                 sizeof(struct pqi_sg_descriptor)) +
5256                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
5257
5258         ctrl_info->max_sg_per_r56_iu =
5259                 ((ctrl_info->max_inbound_iu_length -
5260                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5261                 sizeof(struct pqi_sg_descriptor)) +
5262                 PQI_MAX_EMBEDDED_R56_SG_DESCRIPTORS;
5263 }
5264
5265 static inline void pqi_set_sg_descriptor(struct pqi_sg_descriptor *sg_descriptor,
5266         struct scatterlist *sg)
5267 {
5268         u64 address = (u64)sg_dma_address(sg);
5269         unsigned int length = sg_dma_len(sg);
5270
5271         put_unaligned_le64(address, &sg_descriptor->address);
5272         put_unaligned_le32(length, &sg_descriptor->length);
5273         put_unaligned_le32(0, &sg_descriptor->flags);
5274 }
5275
5276 static unsigned int pqi_build_sg_list(struct pqi_sg_descriptor *sg_descriptor,
5277         struct scatterlist *sg, int sg_count, struct pqi_io_request *io_request,
5278         int max_sg_per_iu, bool *chained)
5279 {
5280         int i;
5281         unsigned int num_sg_in_iu;
5282
5283         *chained = false;
5284         i = 0;
5285         num_sg_in_iu = 0;
5286         max_sg_per_iu--;        /* Subtract 1 to leave room for chain marker. */
5287
5288         while (1) {
5289                 pqi_set_sg_descriptor(sg_descriptor, sg);
5290                 if (!*chained)
5291                         num_sg_in_iu++;
5292                 i++;
5293                 if (i == sg_count)
5294                         break;
5295                 sg_descriptor++;
5296                 if (i == max_sg_per_iu) {
5297                         put_unaligned_le64((u64)io_request->sg_chain_buffer_dma_handle,
5298                                 &sg_descriptor->address);
5299                         put_unaligned_le32((sg_count - num_sg_in_iu) * sizeof(*sg_descriptor),
5300                                 &sg_descriptor->length);
5301                         put_unaligned_le32(CISS_SG_CHAIN, &sg_descriptor->flags);
5302                         *chained = true;
5303                         num_sg_in_iu++;
5304                         sg_descriptor = io_request->sg_chain_buffer;
5305                 }
5306                 sg = sg_next(sg);
5307         }
5308
5309         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
5310
5311         return num_sg_in_iu;
5312 }
5313
5314 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
5315         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
5316         struct pqi_io_request *io_request)
5317 {
5318         u16 iu_length;
5319         int sg_count;
5320         bool chained;
5321         unsigned int num_sg_in_iu;
5322         struct scatterlist *sg;
5323         struct pqi_sg_descriptor *sg_descriptor;
5324
5325         sg_count = scsi_dma_map(scmd);
5326         if (sg_count < 0)
5327                 return sg_count;
5328
5329         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5330                 PQI_REQUEST_HEADER_LENGTH;
5331
5332         if (sg_count == 0)
5333                 goto out;
5334
5335         sg = scsi_sglist(scmd);
5336         sg_descriptor = request->sg_descriptors;
5337
5338         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5339                 ctrl_info->max_sg_per_iu, &chained);
5340
5341         request->partial = chained;
5342         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5343
5344 out:
5345         put_unaligned_le16(iu_length, &request->header.iu_length);
5346
5347         return 0;
5348 }
5349
5350 static int pqi_build_aio_r1_sg_list(struct pqi_ctrl_info *ctrl_info,
5351         struct pqi_aio_r1_path_request *request, struct scsi_cmnd *scmd,
5352         struct pqi_io_request *io_request)
5353 {
5354         u16 iu_length;
5355         int sg_count;
5356         bool chained;
5357         unsigned int num_sg_in_iu;
5358         struct scatterlist *sg;
5359         struct pqi_sg_descriptor *sg_descriptor;
5360
5361         sg_count = scsi_dma_map(scmd);
5362         if (sg_count < 0)
5363                 return sg_count;
5364
5365         iu_length = offsetof(struct pqi_aio_r1_path_request, sg_descriptors) -
5366                 PQI_REQUEST_HEADER_LENGTH;
5367         num_sg_in_iu = 0;
5368
5369         if (sg_count == 0)
5370                 goto out;
5371
5372         sg = scsi_sglist(scmd);
5373         sg_descriptor = request->sg_descriptors;
5374
5375         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5376                 ctrl_info->max_sg_per_iu, &chained);
5377
5378         request->partial = chained;
5379         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5380
5381 out:
5382         put_unaligned_le16(iu_length, &request->header.iu_length);
5383         request->num_sg_descriptors = num_sg_in_iu;
5384
5385         return 0;
5386 }
5387
5388 static int pqi_build_aio_r56_sg_list(struct pqi_ctrl_info *ctrl_info,
5389         struct pqi_aio_r56_path_request *request, struct scsi_cmnd *scmd,
5390         struct pqi_io_request *io_request)
5391 {
5392         u16 iu_length;
5393         int sg_count;
5394         bool chained;
5395         unsigned int num_sg_in_iu;
5396         struct scatterlist *sg;
5397         struct pqi_sg_descriptor *sg_descriptor;
5398
5399         sg_count = scsi_dma_map(scmd);
5400         if (sg_count < 0)
5401                 return sg_count;
5402
5403         iu_length = offsetof(struct pqi_aio_r56_path_request, sg_descriptors) -
5404                 PQI_REQUEST_HEADER_LENGTH;
5405         num_sg_in_iu = 0;
5406
5407         if (sg_count != 0) {
5408                 sg = scsi_sglist(scmd);
5409                 sg_descriptor = request->sg_descriptors;
5410
5411                 num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5412                         ctrl_info->max_sg_per_r56_iu, &chained);
5413
5414                 request->partial = chained;
5415                 iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5416         }
5417
5418         put_unaligned_le16(iu_length, &request->header.iu_length);
5419         request->num_sg_descriptors = num_sg_in_iu;
5420
5421         return 0;
5422 }
5423
5424 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
5425         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
5426         struct pqi_io_request *io_request)
5427 {
5428         u16 iu_length;
5429         int sg_count;
5430         bool chained;
5431         unsigned int num_sg_in_iu;
5432         struct scatterlist *sg;
5433         struct pqi_sg_descriptor *sg_descriptor;
5434
5435         sg_count = scsi_dma_map(scmd);
5436         if (sg_count < 0)
5437                 return sg_count;
5438
5439         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
5440                 PQI_REQUEST_HEADER_LENGTH;
5441         num_sg_in_iu = 0;
5442
5443         if (sg_count == 0)
5444                 goto out;
5445
5446         sg = scsi_sglist(scmd);
5447         sg_descriptor = request->sg_descriptors;
5448
5449         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5450                 ctrl_info->max_sg_per_iu, &chained);
5451
5452         request->partial = chained;
5453         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5454
5455 out:
5456         put_unaligned_le16(iu_length, &request->header.iu_length);
5457         request->num_sg_descriptors = num_sg_in_iu;
5458
5459         return 0;
5460 }
5461
5462 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
5463         void *context)
5464 {
5465         struct scsi_cmnd *scmd;
5466
5467         scmd = io_request->scmd;
5468         pqi_free_io_request(io_request);
5469         scsi_dma_unmap(scmd);
5470         pqi_scsi_done(scmd);
5471 }
5472
5473 static int pqi_raid_submit_io(struct pqi_ctrl_info *ctrl_info,
5474         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5475         struct pqi_queue_group *queue_group, bool io_high_prio)
5476 {
5477         int rc;
5478         size_t cdb_length;
5479         struct pqi_io_request *io_request;
5480         struct pqi_raid_path_request *request;
5481
5482         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5483         if (!io_request)
5484                 return SCSI_MLQUEUE_HOST_BUSY;
5485
5486         io_request->io_complete_callback = pqi_raid_io_complete;
5487         io_request->scmd = scmd;
5488
5489         request = io_request->iu;
5490         memset(request, 0, offsetof(struct pqi_raid_path_request, sg_descriptors));
5491
5492         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5493         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5494         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5495         request->command_priority = io_high_prio;
5496         put_unaligned_le16(io_request->index, &request->request_id);
5497         request->error_index = request->request_id;
5498         memcpy(request->lun_number, device->scsi3addr, sizeof(request->lun_number));
5499         request->ml_device_lun_number = (u8)scmd->device->lun;
5500
5501         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
5502         memcpy(request->cdb, scmd->cmnd, cdb_length);
5503
5504         switch (cdb_length) {
5505         case 6:
5506         case 10:
5507         case 12:
5508         case 16:
5509                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5510                 break;
5511         case 20:
5512                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_4;
5513                 break;
5514         case 24:
5515                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_8;
5516                 break;
5517         case 28:
5518                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_12;
5519                 break;
5520         case 32:
5521         default:
5522                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_16;
5523                 break;
5524         }
5525
5526         switch (scmd->sc_data_direction) {
5527         case DMA_FROM_DEVICE:
5528                 request->data_direction = SOP_READ_FLAG;
5529                 break;
5530         case DMA_TO_DEVICE:
5531                 request->data_direction = SOP_WRITE_FLAG;
5532                 break;
5533         case DMA_NONE:
5534                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5535                 break;
5536         case DMA_BIDIRECTIONAL:
5537                 request->data_direction = SOP_BIDIRECTIONAL;
5538                 break;
5539         default:
5540                 dev_err(&ctrl_info->pci_dev->dev,
5541                         "unknown data direction: %d\n",
5542                         scmd->sc_data_direction);
5543                 break;
5544         }
5545
5546         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
5547         if (rc) {
5548                 pqi_free_io_request(io_request);
5549                 return SCSI_MLQUEUE_HOST_BUSY;
5550         }
5551
5552         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
5553
5554         return 0;
5555 }
5556
5557 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5558         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5559         struct pqi_queue_group *queue_group)
5560 {
5561         bool io_high_prio;
5562
5563         io_high_prio = pqi_is_io_high_priority(device, scmd);
5564
5565         return pqi_raid_submit_io(ctrl_info, device, scmd, queue_group, io_high_prio);
5566 }
5567
5568 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
5569 {
5570         struct scsi_cmnd *scmd;
5571         struct pqi_scsi_dev *device;
5572         struct pqi_ctrl_info *ctrl_info;
5573
5574         if (!io_request->raid_bypass)
5575                 return false;
5576
5577         scmd = io_request->scmd;
5578         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
5579                 return false;
5580         if (host_byte(scmd->result) == DID_NO_CONNECT)
5581                 return false;
5582
5583         device = scmd->device->hostdata;
5584         if (pqi_device_offline(device) || pqi_device_in_remove(device))
5585                 return false;
5586
5587         ctrl_info = shost_to_hba(scmd->device->host);
5588         if (pqi_ctrl_offline(ctrl_info))
5589                 return false;
5590
5591         return true;
5592 }
5593
5594 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
5595         void *context)
5596 {
5597         struct scsi_cmnd *scmd;
5598
5599         scmd = io_request->scmd;
5600         scsi_dma_unmap(scmd);
5601         if (io_request->status == -EAGAIN || pqi_raid_bypass_retry_needed(io_request)) {
5602                 set_host_byte(scmd, DID_IMM_RETRY);
5603                 pqi_cmd_priv(scmd)->this_residual++;
5604         }
5605
5606         pqi_free_io_request(io_request);
5607         pqi_scsi_done(scmd);
5608 }
5609
5610 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5611         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5612         struct pqi_queue_group *queue_group)
5613 {
5614         bool io_high_prio;
5615
5616         io_high_prio = pqi_is_io_high_priority(device, scmd);
5617
5618         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
5619                 scmd->cmnd, scmd->cmd_len, queue_group, NULL,
5620                 false, io_high_prio);
5621 }
5622
5623 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
5624         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
5625         unsigned int cdb_length, struct pqi_queue_group *queue_group,
5626         struct pqi_encryption_info *encryption_info, bool raid_bypass,
5627         bool io_high_prio)
5628 {
5629         int rc;
5630         struct pqi_io_request *io_request;
5631         struct pqi_aio_path_request *request;
5632         struct pqi_scsi_dev *device;
5633
5634         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5635         if (!io_request)
5636                 return SCSI_MLQUEUE_HOST_BUSY;
5637
5638         io_request->io_complete_callback = pqi_aio_io_complete;
5639         io_request->scmd = scmd;
5640         io_request->raid_bypass = raid_bypass;
5641
5642         request = io_request->iu;
5643         memset(request, 0, offsetof(struct pqi_aio_path_request, sg_descriptors));
5644
5645         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
5646         put_unaligned_le32(aio_handle, &request->nexus_id);
5647         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5648         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5649         request->command_priority = io_high_prio;
5650         put_unaligned_le16(io_request->index, &request->request_id);
5651         request->error_index = request->request_id;
5652         device = scmd->device->hostdata;
5653         if (!pqi_is_logical_device(device) && ctrl_info->multi_lun_device_supported)
5654                 put_unaligned_le64(((scmd->device->lun) << 8), &request->lun_number);
5655         if (cdb_length > sizeof(request->cdb))
5656                 cdb_length = sizeof(request->cdb);
5657         request->cdb_length = cdb_length;
5658         memcpy(request->cdb, cdb, cdb_length);
5659
5660         switch (scmd->sc_data_direction) {
5661         case DMA_TO_DEVICE:
5662                 request->data_direction = SOP_READ_FLAG;
5663                 break;
5664         case DMA_FROM_DEVICE:
5665                 request->data_direction = SOP_WRITE_FLAG;
5666                 break;
5667         case DMA_NONE:
5668                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5669                 break;
5670         case DMA_BIDIRECTIONAL:
5671                 request->data_direction = SOP_BIDIRECTIONAL;
5672                 break;
5673         default:
5674                 dev_err(&ctrl_info->pci_dev->dev,
5675                         "unknown data direction: %d\n",
5676                         scmd->sc_data_direction);
5677                 break;
5678         }
5679
5680         if (encryption_info) {
5681                 request->encryption_enable = true;
5682                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5683                         &request->data_encryption_key_index);
5684                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5685                         &request->encrypt_tweak_lower);
5686                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5687                         &request->encrypt_tweak_upper);
5688         }
5689
5690         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
5691         if (rc) {
5692                 pqi_free_io_request(io_request);
5693                 return SCSI_MLQUEUE_HOST_BUSY;
5694         }
5695
5696         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5697
5698         return 0;
5699 }
5700
5701 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
5702         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5703         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5704         struct pqi_scsi_dev_raid_map_data *rmd)
5705 {
5706         int rc;
5707         struct pqi_io_request *io_request;
5708         struct pqi_aio_r1_path_request *r1_request;
5709
5710         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5711         if (!io_request)
5712                 return SCSI_MLQUEUE_HOST_BUSY;
5713
5714         io_request->io_complete_callback = pqi_aio_io_complete;
5715         io_request->scmd = scmd;
5716         io_request->raid_bypass = true;
5717
5718         r1_request = io_request->iu;
5719         memset(r1_request, 0, offsetof(struct pqi_aio_r1_path_request, sg_descriptors));
5720
5721         r1_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID1_IO;
5722         put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r1_request->volume_id);
5723         r1_request->num_drives = rmd->num_it_nexus_entries;
5724         put_unaligned_le32(rmd->it_nexus[0], &r1_request->it_nexus_1);
5725         put_unaligned_le32(rmd->it_nexus[1], &r1_request->it_nexus_2);
5726         if (rmd->num_it_nexus_entries == 3)
5727                 put_unaligned_le32(rmd->it_nexus[2], &r1_request->it_nexus_3);
5728
5729         put_unaligned_le32(scsi_bufflen(scmd), &r1_request->data_length);
5730         r1_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5731         put_unaligned_le16(io_request->index, &r1_request->request_id);
5732         r1_request->error_index = r1_request->request_id;
5733         if (rmd->cdb_length > sizeof(r1_request->cdb))
5734                 rmd->cdb_length = sizeof(r1_request->cdb);
5735         r1_request->cdb_length = rmd->cdb_length;
5736         memcpy(r1_request->cdb, rmd->cdb, rmd->cdb_length);
5737
5738         /* The direction is always write. */
5739         r1_request->data_direction = SOP_READ_FLAG;
5740
5741         if (encryption_info) {
5742                 r1_request->encryption_enable = true;
5743                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5744                                 &r1_request->data_encryption_key_index);
5745                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5746                                 &r1_request->encrypt_tweak_lower);
5747                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5748                                 &r1_request->encrypt_tweak_upper);
5749         }
5750
5751         rc = pqi_build_aio_r1_sg_list(ctrl_info, r1_request, scmd, io_request);
5752         if (rc) {
5753                 pqi_free_io_request(io_request);
5754                 return SCSI_MLQUEUE_HOST_BUSY;
5755         }
5756
5757         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5758
5759         return 0;
5760 }
5761
5762 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
5763         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5764         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5765         struct pqi_scsi_dev_raid_map_data *rmd)
5766 {
5767         int rc;
5768         struct pqi_io_request *io_request;
5769         struct pqi_aio_r56_path_request *r56_request;
5770
5771         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5772         if (!io_request)
5773                 return SCSI_MLQUEUE_HOST_BUSY;
5774         io_request->io_complete_callback = pqi_aio_io_complete;
5775         io_request->scmd = scmd;
5776         io_request->raid_bypass = true;
5777
5778         r56_request = io_request->iu;
5779         memset(r56_request, 0, offsetof(struct pqi_aio_r56_path_request, sg_descriptors));
5780
5781         if (device->raid_level == SA_RAID_5 || device->raid_level == SA_RAID_51)
5782                 r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID5_IO;
5783         else
5784                 r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID6_IO;
5785
5786         put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r56_request->volume_id);
5787         put_unaligned_le32(rmd->aio_handle, &r56_request->data_it_nexus);
5788         put_unaligned_le32(rmd->p_parity_it_nexus, &r56_request->p_parity_it_nexus);
5789         if (rmd->raid_level == SA_RAID_6) {
5790                 put_unaligned_le32(rmd->q_parity_it_nexus, &r56_request->q_parity_it_nexus);
5791                 r56_request->xor_multiplier = rmd->xor_mult;
5792         }
5793         put_unaligned_le32(scsi_bufflen(scmd), &r56_request->data_length);
5794         r56_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5795         put_unaligned_le64(rmd->row, &r56_request->row);
5796
5797         put_unaligned_le16(io_request->index, &r56_request->request_id);
5798         r56_request->error_index = r56_request->request_id;
5799
5800         if (rmd->cdb_length > sizeof(r56_request->cdb))
5801                 rmd->cdb_length = sizeof(r56_request->cdb);
5802         r56_request->cdb_length = rmd->cdb_length;
5803         memcpy(r56_request->cdb, rmd->cdb, rmd->cdb_length);
5804
5805         /* The direction is always write. */
5806         r56_request->data_direction = SOP_READ_FLAG;
5807
5808         if (encryption_info) {
5809                 r56_request->encryption_enable = true;
5810                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5811                                 &r56_request->data_encryption_key_index);
5812                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5813                                 &r56_request->encrypt_tweak_lower);
5814                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5815                                 &r56_request->encrypt_tweak_upper);
5816         }
5817
5818         rc = pqi_build_aio_r56_sg_list(ctrl_info, r56_request, scmd, io_request);
5819         if (rc) {
5820                 pqi_free_io_request(io_request);
5821                 return SCSI_MLQUEUE_HOST_BUSY;
5822         }
5823
5824         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5825
5826         return 0;
5827 }
5828
5829 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
5830         struct scsi_cmnd *scmd)
5831 {
5832         /*
5833          * We are setting host_tagset = 1 during init.
5834          */
5835         return blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scsi_cmd_to_rq(scmd)));
5836 }
5837
5838 static inline bool pqi_is_bypass_eligible_request(struct scsi_cmnd *scmd)
5839 {
5840         if (blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))
5841                 return false;
5842
5843         return pqi_cmd_priv(scmd)->this_residual == 0;
5844 }
5845
5846 /*
5847  * This function gets called just before we hand the completed SCSI request
5848  * back to the SML.
5849  */
5850
5851 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
5852 {
5853         struct pqi_scsi_dev *device;
5854
5855         if (!scmd->device) {
5856                 set_host_byte(scmd, DID_NO_CONNECT);
5857                 return;
5858         }
5859
5860         device = scmd->device->hostdata;
5861         if (!device) {
5862                 set_host_byte(scmd, DID_NO_CONNECT);
5863                 return;
5864         }
5865
5866         atomic_dec(&device->scsi_cmds_outstanding[scmd->device->lun]);
5867 }
5868
5869 static bool pqi_is_parity_write_stream(struct pqi_ctrl_info *ctrl_info,
5870         struct scsi_cmnd *scmd)
5871 {
5872         u32 oldest_jiffies;
5873         u8 lru_index;
5874         int i;
5875         int rc;
5876         struct pqi_scsi_dev *device;
5877         struct pqi_stream_data *pqi_stream_data;
5878         struct pqi_scsi_dev_raid_map_data rmd;
5879
5880         if (!ctrl_info->enable_stream_detection)
5881                 return false;
5882
5883         rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
5884         if (rc)
5885                 return false;
5886
5887         /* Check writes only. */
5888         if (!rmd.is_write)
5889                 return false;
5890
5891         device = scmd->device->hostdata;
5892
5893         /* Check for RAID 5/6 streams. */
5894         if (device->raid_level != SA_RAID_5 && device->raid_level != SA_RAID_6)
5895                 return false;
5896
5897         /*
5898          * If controller does not support AIO RAID{5,6} writes, need to send
5899          * requests down non-AIO path.
5900          */
5901         if ((device->raid_level == SA_RAID_5 && !ctrl_info->enable_r5_writes) ||
5902                 (device->raid_level == SA_RAID_6 && !ctrl_info->enable_r6_writes))
5903                 return true;
5904
5905         lru_index = 0;
5906         oldest_jiffies = INT_MAX;
5907         for (i = 0; i < NUM_STREAMS_PER_LUN; i++) {
5908                 pqi_stream_data = &device->stream_data[i];
5909                 /*
5910                  * Check for adjacent request or request is within
5911                  * the previous request.
5912                  */
5913                 if ((pqi_stream_data->next_lba &&
5914                         rmd.first_block >= pqi_stream_data->next_lba) &&
5915                         rmd.first_block <= pqi_stream_data->next_lba +
5916                                 rmd.block_cnt) {
5917                         pqi_stream_data->next_lba = rmd.first_block +
5918                                 rmd.block_cnt;
5919                         pqi_stream_data->last_accessed = jiffies;
5920                         return true;
5921                 }
5922
5923                 /* unused entry */
5924                 if (pqi_stream_data->last_accessed == 0) {
5925                         lru_index = i;
5926                         break;
5927                 }
5928
5929                 /* Find entry with oldest last accessed time. */
5930                 if (pqi_stream_data->last_accessed <= oldest_jiffies) {
5931                         oldest_jiffies = pqi_stream_data->last_accessed;
5932                         lru_index = i;
5933                 }
5934         }
5935
5936         /* Set LRU entry. */
5937         pqi_stream_data = &device->stream_data[lru_index];
5938         pqi_stream_data->last_accessed = jiffies;
5939         pqi_stream_data->next_lba = rmd.first_block + rmd.block_cnt;
5940
5941         return false;
5942 }
5943
5944 static int pqi_scsi_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
5945 {
5946         int rc;
5947         struct pqi_ctrl_info *ctrl_info;
5948         struct pqi_scsi_dev *device;
5949         u16 hw_queue;
5950         struct pqi_queue_group *queue_group;
5951         bool raid_bypassed;
5952
5953         device = scmd->device->hostdata;
5954
5955         if (!device) {
5956                 set_host_byte(scmd, DID_NO_CONNECT);
5957                 pqi_scsi_done(scmd);
5958                 return 0;
5959         }
5960
5961         atomic_inc(&device->scsi_cmds_outstanding[scmd->device->lun]);
5962
5963         ctrl_info = shost_to_hba(shost);
5964
5965         if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(device)) {
5966                 set_host_byte(scmd, DID_NO_CONNECT);
5967                 pqi_scsi_done(scmd);
5968                 return 0;
5969         }
5970
5971         if (pqi_ctrl_blocked(ctrl_info)) {
5972                 rc = SCSI_MLQUEUE_HOST_BUSY;
5973                 goto out;
5974         }
5975
5976         /*
5977          * This is necessary because the SML doesn't zero out this field during
5978          * error recovery.
5979          */
5980         scmd->result = 0;
5981
5982         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
5983         queue_group = &ctrl_info->queue_groups[hw_queue];
5984
5985         if (pqi_is_logical_device(device)) {
5986                 raid_bypassed = false;
5987                 if (device->raid_bypass_enabled &&
5988                         pqi_is_bypass_eligible_request(scmd) &&
5989                         !pqi_is_parity_write_stream(ctrl_info, scmd)) {
5990                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5991                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) {
5992                                 raid_bypassed = true;
5993                                 device->raid_bypass_cnt++;
5994                         }
5995                 }
5996                 if (!raid_bypassed)
5997                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5998         } else {
5999                 if (device->aio_enabled)
6000                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6001                 else
6002                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6003         }
6004
6005 out:
6006         if (rc)
6007                 atomic_dec(&device->scsi_cmds_outstanding[scmd->device->lun]);
6008
6009         return rc;
6010 }
6011
6012 static unsigned int pqi_queued_io_count(struct pqi_ctrl_info *ctrl_info)
6013 {
6014         unsigned int i;
6015         unsigned int path;
6016         unsigned long flags;
6017         unsigned int queued_io_count;
6018         struct pqi_queue_group *queue_group;
6019         struct pqi_io_request *io_request;
6020
6021         queued_io_count = 0;
6022
6023         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6024                 queue_group = &ctrl_info->queue_groups[i];
6025                 for (path = 0; path < 2; path++) {
6026                         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
6027                         list_for_each_entry(io_request, &queue_group->request_list[path], request_list_entry)
6028                                 queued_io_count++;
6029                         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
6030                 }
6031         }
6032
6033         return queued_io_count;
6034 }
6035
6036 static unsigned int pqi_nonempty_inbound_queue_count(struct pqi_ctrl_info *ctrl_info)
6037 {
6038         unsigned int i;
6039         unsigned int path;
6040         unsigned int nonempty_inbound_queue_count;
6041         struct pqi_queue_group *queue_group;
6042         pqi_index_t iq_pi;
6043         pqi_index_t iq_ci;
6044
6045         nonempty_inbound_queue_count = 0;
6046
6047         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6048                 queue_group = &ctrl_info->queue_groups[i];
6049                 for (path = 0; path < 2; path++) {
6050                         iq_pi = queue_group->iq_pi_copy[path];
6051                         iq_ci = readl(queue_group->iq_ci[path]);
6052                         if (iq_ci != iq_pi)
6053                                 nonempty_inbound_queue_count++;
6054                 }
6055         }
6056
6057         return nonempty_inbound_queue_count;
6058 }
6059
6060 #define PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS        10
6061
6062 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
6063 {
6064         unsigned long start_jiffies;
6065         unsigned long warning_timeout;
6066         unsigned int queued_io_count;
6067         unsigned int nonempty_inbound_queue_count;
6068         bool displayed_warning;
6069
6070         displayed_warning = false;
6071         start_jiffies = jiffies;
6072         warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
6073
6074         while (1) {
6075                 queued_io_count = pqi_queued_io_count(ctrl_info);
6076                 nonempty_inbound_queue_count = pqi_nonempty_inbound_queue_count(ctrl_info);
6077                 if (queued_io_count == 0 && nonempty_inbound_queue_count == 0)
6078                         break;
6079                 pqi_check_ctrl_health(ctrl_info);
6080                 if (pqi_ctrl_offline(ctrl_info))
6081                         return -ENXIO;
6082                 if (time_after(jiffies, warning_timeout)) {
6083                         dev_warn(&ctrl_info->pci_dev->dev,
6084                                 "waiting %u seconds for queued I/O to drain (queued I/O count: %u; non-empty inbound queue count: %u)\n",
6085                                 jiffies_to_msecs(jiffies - start_jiffies) / 1000, queued_io_count, nonempty_inbound_queue_count);
6086                         displayed_warning = true;
6087                         warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * HZ) + jiffies;
6088                 }
6089                 usleep_range(1000, 2000);
6090         }
6091
6092         if (displayed_warning)
6093                 dev_warn(&ctrl_info->pci_dev->dev,
6094                         "queued I/O drained after waiting for %u seconds\n",
6095                         jiffies_to_msecs(jiffies - start_jiffies) / 1000);
6096
6097         return 0;
6098 }
6099
6100 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
6101         struct pqi_scsi_dev *device)
6102 {
6103         unsigned int i;
6104         unsigned int path;
6105         struct pqi_queue_group *queue_group;
6106         unsigned long flags;
6107         struct pqi_io_request *io_request;
6108         struct pqi_io_request *next;
6109         struct scsi_cmnd *scmd;
6110         struct pqi_scsi_dev *scsi_device;
6111
6112         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6113                 queue_group = &ctrl_info->queue_groups[i];
6114
6115                 for (path = 0; path < 2; path++) {
6116                         spin_lock_irqsave(
6117                                 &queue_group->submit_lock[path], flags);
6118
6119                         list_for_each_entry_safe(io_request, next,
6120                                 &queue_group->request_list[path],
6121                                 request_list_entry) {
6122
6123                                 scmd = io_request->scmd;
6124                                 if (!scmd)
6125                                         continue;
6126
6127                                 scsi_device = scmd->device->hostdata;
6128                                 if (scsi_device != device)
6129                                         continue;
6130
6131                                 list_del(&io_request->request_list_entry);
6132                                 set_host_byte(scmd, DID_RESET);
6133                                 pqi_free_io_request(io_request);
6134                                 scsi_dma_unmap(scmd);
6135                                 pqi_scsi_done(scmd);
6136                         }
6137
6138                         spin_unlock_irqrestore(
6139                                 &queue_group->submit_lock[path], flags);
6140                 }
6141         }
6142 }
6143
6144 #define PQI_PENDING_IO_WARNING_TIMEOUT_SECS     10
6145
6146 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
6147         struct pqi_scsi_dev *device, u8 lun, unsigned long timeout_msecs)
6148 {
6149         int cmds_outstanding;
6150         unsigned long start_jiffies;
6151         unsigned long warning_timeout;
6152         unsigned long msecs_waiting;
6153
6154         start_jiffies = jiffies;
6155         warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
6156
6157         while ((cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding[lun])) > 0) {
6158                 if (ctrl_info->ctrl_removal_state != PQI_CTRL_GRACEFUL_REMOVAL) {
6159                         pqi_check_ctrl_health(ctrl_info);
6160                         if (pqi_ctrl_offline(ctrl_info))
6161                                 return -ENXIO;
6162                 }
6163                 msecs_waiting = jiffies_to_msecs(jiffies - start_jiffies);
6164                 if (msecs_waiting >= timeout_msecs) {
6165                         dev_err(&ctrl_info->pci_dev->dev,
6166                                 "scsi %d:%d:%d:%d: timed out after %lu seconds waiting for %d outstanding command(s)\n",
6167                                 ctrl_info->scsi_host->host_no, device->bus, device->target,
6168                                 lun, msecs_waiting / 1000, cmds_outstanding);
6169                         return -ETIMEDOUT;
6170                 }
6171                 if (time_after(jiffies, warning_timeout)) {
6172                         dev_warn(&ctrl_info->pci_dev->dev,
6173                                 "scsi %d:%d:%d:%d: waiting %lu seconds for %d outstanding command(s)\n",
6174                                 ctrl_info->scsi_host->host_no, device->bus, device->target,
6175                                 lun, msecs_waiting / 1000, cmds_outstanding);
6176                         warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * HZ) + jiffies;
6177                 }
6178                 usleep_range(1000, 2000);
6179         }
6180
6181         return 0;
6182 }
6183
6184 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
6185         void *context)
6186 {
6187         struct completion *waiting = context;
6188
6189         complete(waiting);
6190 }
6191
6192 #define PQI_LUN_RESET_POLL_COMPLETION_SECS      10
6193
6194 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
6195         struct pqi_scsi_dev *device, u8 lun, struct completion *wait)
6196 {
6197         int rc;
6198         unsigned int wait_secs;
6199         int cmds_outstanding;
6200
6201         wait_secs = 0;
6202
6203         while (1) {
6204                 if (wait_for_completion_io_timeout(wait,
6205                         PQI_LUN_RESET_POLL_COMPLETION_SECS * HZ)) {
6206                         rc = 0;
6207                         break;
6208                 }
6209
6210                 pqi_check_ctrl_health(ctrl_info);
6211                 if (pqi_ctrl_offline(ctrl_info)) {
6212                         rc = -ENXIO;
6213                         break;
6214                 }
6215
6216                 wait_secs += PQI_LUN_RESET_POLL_COMPLETION_SECS;
6217                 cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding[lun]);
6218                 dev_warn(&ctrl_info->pci_dev->dev,
6219                         "scsi %d:%d:%d:%d: waiting %u seconds for LUN reset to complete (%d command(s) outstanding)\n",
6220                         ctrl_info->scsi_host->host_no, device->bus, device->target, lun, wait_secs, cmds_outstanding);
6221         }
6222
6223         return rc;
6224 }
6225
6226 #define PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS     30
6227
6228 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
6229 {
6230         int rc;
6231         struct pqi_io_request *io_request;
6232         DECLARE_COMPLETION_ONSTACK(wait);
6233         struct pqi_task_management_request *request;
6234         struct pqi_scsi_dev *device;
6235
6236         device = scmd->device->hostdata;
6237         io_request = pqi_alloc_io_request(ctrl_info, NULL);
6238         io_request->io_complete_callback = pqi_lun_reset_complete;
6239         io_request->context = &wait;
6240
6241         request = io_request->iu;
6242         memset(request, 0, sizeof(*request));
6243
6244         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
6245         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
6246                 &request->header.iu_length);
6247         put_unaligned_le16(io_request->index, &request->request_id);
6248         memcpy(request->lun_number, device->scsi3addr,
6249                 sizeof(request->lun_number));
6250         if (!pqi_is_logical_device(device) && ctrl_info->multi_lun_device_supported)
6251                 request->ml_device_lun_number = (u8)scmd->device->lun;
6252         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
6253         if (ctrl_info->tmf_iu_timeout_supported)
6254                 put_unaligned_le16(PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS, &request->timeout);
6255
6256         pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
6257                 io_request);
6258
6259         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, (u8)scmd->device->lun, &wait);
6260         if (rc == 0)
6261                 rc = io_request->status;
6262
6263         pqi_free_io_request(io_request);
6264
6265         return rc;
6266 }
6267
6268 #define PQI_LUN_RESET_RETRIES                           3
6269 #define PQI_LUN_RESET_RETRY_INTERVAL_MSECS              (10 * 1000)
6270 #define PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS          (10 * 60 * 1000)
6271 #define PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS   (2 * 60 * 1000)
6272
6273 static int pqi_lun_reset_with_retries(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
6274 {
6275         int reset_rc;
6276         int wait_rc;
6277         unsigned int retries;
6278         unsigned long timeout_msecs;
6279         struct pqi_scsi_dev *device;
6280
6281         device = scmd->device->hostdata;
6282         for (retries = 0;;) {
6283                 reset_rc = pqi_lun_reset(ctrl_info, scmd);
6284                 if (reset_rc == 0 || reset_rc == -ENODEV || ++retries > PQI_LUN_RESET_RETRIES)
6285                         break;
6286                 msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
6287         }
6288
6289         timeout_msecs = reset_rc ? PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS :
6290                 PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS;
6291
6292         wait_rc = pqi_device_wait_for_pending_io(ctrl_info, device, scmd->device->lun, timeout_msecs);
6293         if (wait_rc && reset_rc == 0)
6294                 reset_rc = wait_rc;
6295
6296         return reset_rc == 0 ? SUCCESS : FAILED;
6297 }
6298
6299 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
6300 {
6301         int rc;
6302         struct pqi_scsi_dev *device;
6303
6304         device = scmd->device->hostdata;
6305         pqi_ctrl_block_requests(ctrl_info);
6306         pqi_ctrl_wait_until_quiesced(ctrl_info);
6307         pqi_fail_io_queued_for_device(ctrl_info, device);
6308         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
6309         if (rc)
6310                 rc = FAILED;
6311         else
6312                 rc = pqi_lun_reset_with_retries(ctrl_info, scmd);
6313         pqi_ctrl_unblock_requests(ctrl_info);
6314
6315         return rc;
6316 }
6317
6318 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
6319 {
6320         int rc;
6321         struct Scsi_Host *shost;
6322         struct pqi_ctrl_info *ctrl_info;
6323         struct pqi_scsi_dev *device;
6324
6325         shost = scmd->device->host;
6326         ctrl_info = shost_to_hba(shost);
6327         device = scmd->device->hostdata;
6328
6329         mutex_lock(&ctrl_info->lun_reset_mutex);
6330
6331         dev_err(&ctrl_info->pci_dev->dev,
6332                 "resetting scsi %d:%d:%d:%d due to cmd 0x%02x\n",
6333                 shost->host_no,
6334                 device->bus, device->target, (u32)scmd->device->lun,
6335                 scmd->cmd_len > 0 ? scmd->cmnd[0] : 0xff);
6336
6337         pqi_check_ctrl_health(ctrl_info);
6338         if (pqi_ctrl_offline(ctrl_info))
6339                 rc = FAILED;
6340         else
6341                 rc = pqi_device_reset(ctrl_info, scmd);
6342
6343         dev_err(&ctrl_info->pci_dev->dev,
6344                 "reset of scsi %d:%d:%d:%d: %s\n",
6345                 shost->host_no, device->bus, device->target, (u32)scmd->device->lun,
6346                 rc == SUCCESS ? "SUCCESS" : "FAILED");
6347
6348         mutex_unlock(&ctrl_info->lun_reset_mutex);
6349
6350         return rc;
6351 }
6352
6353 static int pqi_slave_alloc(struct scsi_device *sdev)
6354 {
6355         struct pqi_scsi_dev *device;
6356         unsigned long flags;
6357         struct pqi_ctrl_info *ctrl_info;
6358         struct scsi_target *starget;
6359         struct sas_rphy *rphy;
6360
6361         ctrl_info = shost_to_hba(sdev->host);
6362
6363         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6364
6365         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
6366                 starget = scsi_target(sdev);
6367                 rphy = target_to_rphy(starget);
6368                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
6369                 if (device) {
6370                         if (device->target_lun_valid) {
6371                                 device->ignore_device = true;
6372                         } else {
6373                                 device->target = sdev_id(sdev);
6374                                 device->lun = sdev->lun;
6375                                 device->target_lun_valid = true;
6376                         }
6377                 }
6378         } else {
6379                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
6380                         sdev_id(sdev), sdev->lun);
6381         }
6382
6383         if (device) {
6384                 sdev->hostdata = device;
6385                 device->sdev = sdev;
6386                 if (device->queue_depth) {
6387                         device->advertised_queue_depth = device->queue_depth;
6388                         scsi_change_queue_depth(sdev,
6389                                 device->advertised_queue_depth);
6390                 }
6391                 if (pqi_is_logical_device(device)) {
6392                         pqi_disable_write_same(sdev);
6393                 } else {
6394                         sdev->allow_restart = 1;
6395                         if (device->device_type == SA_DEVICE_TYPE_NVME)
6396                                 pqi_disable_write_same(sdev);
6397                 }
6398         }
6399
6400         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6401
6402         return 0;
6403 }
6404
6405 static void pqi_map_queues(struct Scsi_Host *shost)
6406 {
6407         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6408
6409         blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
6410                               ctrl_info->pci_dev, 0);
6411 }
6412
6413 static inline bool pqi_is_tape_changer_device(struct pqi_scsi_dev *device)
6414 {
6415         return device->devtype == TYPE_TAPE || device->devtype == TYPE_MEDIUM_CHANGER;
6416 }
6417
6418 static int pqi_slave_configure(struct scsi_device *sdev)
6419 {
6420         int rc = 0;
6421         struct pqi_scsi_dev *device;
6422
6423         device = sdev->hostdata;
6424         device->devtype = sdev->type;
6425
6426         if (pqi_is_tape_changer_device(device) && device->ignore_device) {
6427                 rc = -ENXIO;
6428                 device->ignore_device = false;
6429         }
6430
6431         return rc;
6432 }
6433
6434 static void pqi_slave_destroy(struct scsi_device *sdev)
6435 {
6436         struct pqi_ctrl_info *ctrl_info;
6437         struct pqi_scsi_dev *device;
6438         int mutex_acquired;
6439         unsigned long flags;
6440
6441         ctrl_info = shost_to_hba(sdev->host);
6442
6443         mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
6444         if (!mutex_acquired)
6445                 return;
6446
6447         device = sdev->hostdata;
6448         if (!device) {
6449                 mutex_unlock(&ctrl_info->scan_mutex);
6450                 return;
6451         }
6452
6453         device->lun_count--;
6454         if (device->lun_count > 0) {
6455                 mutex_unlock(&ctrl_info->scan_mutex);
6456                 return;
6457         }
6458
6459         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6460         list_del(&device->scsi_device_list_entry);
6461         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6462
6463         mutex_unlock(&ctrl_info->scan_mutex);
6464
6465         pqi_dev_info(ctrl_info, "removed", device);
6466         pqi_free_device(device);
6467 }
6468
6469 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6470 {
6471         struct pci_dev *pci_dev;
6472         u32 subsystem_vendor;
6473         u32 subsystem_device;
6474         cciss_pci_info_struct pciinfo;
6475
6476         if (!arg)
6477                 return -EINVAL;
6478
6479         pci_dev = ctrl_info->pci_dev;
6480
6481         pciinfo.domain = pci_domain_nr(pci_dev->bus);
6482         pciinfo.bus = pci_dev->bus->number;
6483         pciinfo.dev_fn = pci_dev->devfn;
6484         subsystem_vendor = pci_dev->subsystem_vendor;
6485         subsystem_device = pci_dev->subsystem_device;
6486         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) | subsystem_vendor;
6487
6488         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
6489                 return -EFAULT;
6490
6491         return 0;
6492 }
6493
6494 static int pqi_getdrivver_ioctl(void __user *arg)
6495 {
6496         u32 version;
6497
6498         if (!arg)
6499                 return -EINVAL;
6500
6501         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
6502                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
6503
6504         if (copy_to_user(arg, &version, sizeof(version)))
6505                 return -EFAULT;
6506
6507         return 0;
6508 }
6509
6510 struct ciss_error_info {
6511         u8      scsi_status;
6512         int     command_status;
6513         size_t  sense_data_length;
6514 };
6515
6516 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
6517         struct ciss_error_info *ciss_error_info)
6518 {
6519         int ciss_cmd_status;
6520         size_t sense_data_length;
6521
6522         switch (pqi_error_info->data_out_result) {
6523         case PQI_DATA_IN_OUT_GOOD:
6524                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
6525                 break;
6526         case PQI_DATA_IN_OUT_UNDERFLOW:
6527                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
6528                 break;
6529         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
6530                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
6531                 break;
6532         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
6533         case PQI_DATA_IN_OUT_BUFFER_ERROR:
6534         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
6535         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
6536         case PQI_DATA_IN_OUT_ERROR:
6537                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
6538                 break;
6539         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
6540         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
6541         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
6542         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
6543         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
6544         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
6545         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
6546         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
6547         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
6548         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
6549                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
6550                 break;
6551         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
6552                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
6553                 break;
6554         case PQI_DATA_IN_OUT_ABORTED:
6555                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
6556                 break;
6557         case PQI_DATA_IN_OUT_TIMEOUT:
6558                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
6559                 break;
6560         default:
6561                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
6562                 break;
6563         }
6564
6565         sense_data_length =
6566                 get_unaligned_le16(&pqi_error_info->sense_data_length);
6567         if (sense_data_length == 0)
6568                 sense_data_length =
6569                 get_unaligned_le16(&pqi_error_info->response_data_length);
6570         if (sense_data_length)
6571                 if (sense_data_length > sizeof(pqi_error_info->data))
6572                         sense_data_length = sizeof(pqi_error_info->data);
6573
6574         ciss_error_info->scsi_status = pqi_error_info->status;
6575         ciss_error_info->command_status = ciss_cmd_status;
6576         ciss_error_info->sense_data_length = sense_data_length;
6577 }
6578
6579 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6580 {
6581         int rc;
6582         char *kernel_buffer = NULL;
6583         u16 iu_length;
6584         size_t sense_data_length;
6585         IOCTL_Command_struct iocommand;
6586         struct pqi_raid_path_request request;
6587         struct pqi_raid_error_info pqi_error_info;
6588         struct ciss_error_info ciss_error_info;
6589
6590         if (pqi_ctrl_offline(ctrl_info))
6591                 return -ENXIO;
6592         if (pqi_ofa_in_progress(ctrl_info) && pqi_ctrl_blocked(ctrl_info))
6593                 return -EBUSY;
6594         if (!arg)
6595                 return -EINVAL;
6596         if (!capable(CAP_SYS_RAWIO))
6597                 return -EPERM;
6598         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
6599                 return -EFAULT;
6600         if (iocommand.buf_size < 1 &&
6601                 iocommand.Request.Type.Direction != XFER_NONE)
6602                 return -EINVAL;
6603         if (iocommand.Request.CDBLen > sizeof(request.cdb))
6604                 return -EINVAL;
6605         if (iocommand.Request.Type.Type != TYPE_CMD)
6606                 return -EINVAL;
6607
6608         switch (iocommand.Request.Type.Direction) {
6609         case XFER_NONE:
6610         case XFER_WRITE:
6611         case XFER_READ:
6612         case XFER_READ | XFER_WRITE:
6613                 break;
6614         default:
6615                 return -EINVAL;
6616         }
6617
6618         if (iocommand.buf_size > 0) {
6619                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
6620                 if (!kernel_buffer)
6621                         return -ENOMEM;
6622                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
6623                         if (copy_from_user(kernel_buffer, iocommand.buf,
6624                                 iocommand.buf_size)) {
6625                                 rc = -EFAULT;
6626                                 goto out;
6627                         }
6628                 } else {
6629                         memset(kernel_buffer, 0, iocommand.buf_size);
6630                 }
6631         }
6632
6633         memset(&request, 0, sizeof(request));
6634
6635         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
6636         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
6637                 PQI_REQUEST_HEADER_LENGTH;
6638         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
6639                 sizeof(request.lun_number));
6640         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
6641         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
6642
6643         switch (iocommand.Request.Type.Direction) {
6644         case XFER_NONE:
6645                 request.data_direction = SOP_NO_DIRECTION_FLAG;
6646                 break;
6647         case XFER_WRITE:
6648                 request.data_direction = SOP_WRITE_FLAG;
6649                 break;
6650         case XFER_READ:
6651                 request.data_direction = SOP_READ_FLAG;
6652                 break;
6653         case XFER_READ | XFER_WRITE:
6654                 request.data_direction = SOP_BIDIRECTIONAL;
6655                 break;
6656         }
6657
6658         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
6659
6660         if (iocommand.buf_size > 0) {
6661                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
6662
6663                 rc = pqi_map_single(ctrl_info->pci_dev,
6664                         &request.sg_descriptors[0], kernel_buffer,
6665                         iocommand.buf_size, DMA_BIDIRECTIONAL);
6666                 if (rc)
6667                         goto out;
6668
6669                 iu_length += sizeof(request.sg_descriptors[0]);
6670         }
6671
6672         put_unaligned_le16(iu_length, &request.header.iu_length);
6673
6674         if (ctrl_info->raid_iu_timeout_supported)
6675                 put_unaligned_le32(iocommand.Request.Timeout, &request.timeout);
6676
6677         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6678                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info);
6679
6680         if (iocommand.buf_size > 0)
6681                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
6682                         DMA_BIDIRECTIONAL);
6683
6684         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
6685
6686         if (rc == 0) {
6687                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
6688                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
6689                 iocommand.error_info.CommandStatus =
6690                         ciss_error_info.command_status;
6691                 sense_data_length = ciss_error_info.sense_data_length;
6692                 if (sense_data_length) {
6693                         if (sense_data_length >
6694                                 sizeof(iocommand.error_info.SenseInfo))
6695                                 sense_data_length =
6696                                         sizeof(iocommand.error_info.SenseInfo);
6697                         memcpy(iocommand.error_info.SenseInfo,
6698                                 pqi_error_info.data, sense_data_length);
6699                         iocommand.error_info.SenseLen = sense_data_length;
6700                 }
6701         }
6702
6703         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
6704                 rc = -EFAULT;
6705                 goto out;
6706         }
6707
6708         if (rc == 0 && iocommand.buf_size > 0 &&
6709                 (iocommand.Request.Type.Direction & XFER_READ)) {
6710                 if (copy_to_user(iocommand.buf, kernel_buffer,
6711                         iocommand.buf_size)) {
6712                         rc = -EFAULT;
6713                 }
6714         }
6715
6716 out:
6717         kfree(kernel_buffer);
6718
6719         return rc;
6720 }
6721
6722 static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
6723                      void __user *arg)
6724 {
6725         int rc;
6726         struct pqi_ctrl_info *ctrl_info;
6727
6728         ctrl_info = shost_to_hba(sdev->host);
6729
6730         switch (cmd) {
6731         case CCISS_DEREGDISK:
6732         case CCISS_REGNEWDISK:
6733         case CCISS_REGNEWD:
6734                 rc = pqi_scan_scsi_devices(ctrl_info);
6735                 break;
6736         case CCISS_GETPCIINFO:
6737                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
6738                 break;
6739         case CCISS_GETDRIVVER:
6740                 rc = pqi_getdrivver_ioctl(arg);
6741                 break;
6742         case CCISS_PASSTHRU:
6743                 rc = pqi_passthru_ioctl(ctrl_info, arg);
6744                 break;
6745         default:
6746                 rc = -EINVAL;
6747                 break;
6748         }
6749
6750         return rc;
6751 }
6752
6753 static ssize_t pqi_firmware_version_show(struct device *dev,
6754         struct device_attribute *attr, char *buffer)
6755 {
6756         struct Scsi_Host *shost;
6757         struct pqi_ctrl_info *ctrl_info;
6758
6759         shost = class_to_shost(dev);
6760         ctrl_info = shost_to_hba(shost);
6761
6762         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version);
6763 }
6764
6765 static ssize_t pqi_driver_version_show(struct device *dev,
6766         struct device_attribute *attr, char *buffer)
6767 {
6768         return scnprintf(buffer, PAGE_SIZE, "%s\n", DRIVER_VERSION BUILD_TIMESTAMP);
6769 }
6770
6771 static ssize_t pqi_serial_number_show(struct device *dev,
6772         struct device_attribute *attr, char *buffer)
6773 {
6774         struct Scsi_Host *shost;
6775         struct pqi_ctrl_info *ctrl_info;
6776
6777         shost = class_to_shost(dev);
6778         ctrl_info = shost_to_hba(shost);
6779
6780         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->serial_number);
6781 }
6782
6783 static ssize_t pqi_model_show(struct device *dev,
6784         struct device_attribute *attr, char *buffer)
6785 {
6786         struct Scsi_Host *shost;
6787         struct pqi_ctrl_info *ctrl_info;
6788
6789         shost = class_to_shost(dev);
6790         ctrl_info = shost_to_hba(shost);
6791
6792         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->model);
6793 }
6794
6795 static ssize_t pqi_vendor_show(struct device *dev,
6796         struct device_attribute *attr, char *buffer)
6797 {
6798         struct Scsi_Host *shost;
6799         struct pqi_ctrl_info *ctrl_info;
6800
6801         shost = class_to_shost(dev);
6802         ctrl_info = shost_to_hba(shost);
6803
6804         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->vendor);
6805 }
6806
6807 static ssize_t pqi_host_rescan_store(struct device *dev,
6808         struct device_attribute *attr, const char *buffer, size_t count)
6809 {
6810         struct Scsi_Host *shost = class_to_shost(dev);
6811
6812         pqi_scan_start(shost);
6813
6814         return count;
6815 }
6816
6817 static ssize_t pqi_lockup_action_show(struct device *dev,
6818         struct device_attribute *attr, char *buffer)
6819 {
6820         int count = 0;
6821         unsigned int i;
6822
6823         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6824                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
6825                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6826                                 "[%s] ", pqi_lockup_actions[i].name);
6827                 else
6828                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6829                                 "%s ", pqi_lockup_actions[i].name);
6830         }
6831
6832         count += scnprintf(buffer + count, PAGE_SIZE - count, "\n");
6833
6834         return count;
6835 }
6836
6837 static ssize_t pqi_lockup_action_store(struct device *dev,
6838         struct device_attribute *attr, const char *buffer, size_t count)
6839 {
6840         unsigned int i;
6841         char *action_name;
6842         char action_name_buffer[32];
6843
6844         strscpy(action_name_buffer, buffer, sizeof(action_name_buffer));
6845         action_name = strstrip(action_name_buffer);
6846
6847         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6848                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
6849                         pqi_lockup_action = pqi_lockup_actions[i].action;
6850                         return count;
6851                 }
6852         }
6853
6854         return -EINVAL;
6855 }
6856
6857 static ssize_t pqi_host_enable_stream_detection_show(struct device *dev,
6858         struct device_attribute *attr, char *buffer)
6859 {
6860         struct Scsi_Host *shost = class_to_shost(dev);
6861         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6862
6863         return scnprintf(buffer, 10, "%x\n",
6864                         ctrl_info->enable_stream_detection);
6865 }
6866
6867 static ssize_t pqi_host_enable_stream_detection_store(struct device *dev,
6868         struct device_attribute *attr, const char *buffer, size_t count)
6869 {
6870         struct Scsi_Host *shost = class_to_shost(dev);
6871         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6872         u8 set_stream_detection = 0;
6873
6874         if (kstrtou8(buffer, 0, &set_stream_detection))
6875                 return -EINVAL;
6876
6877         if (set_stream_detection > 0)
6878                 set_stream_detection = 1;
6879
6880         ctrl_info->enable_stream_detection = set_stream_detection;
6881
6882         return count;
6883 }
6884
6885 static ssize_t pqi_host_enable_r5_writes_show(struct device *dev,
6886         struct device_attribute *attr, char *buffer)
6887 {
6888         struct Scsi_Host *shost = class_to_shost(dev);
6889         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6890
6891         return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r5_writes);
6892 }
6893
6894 static ssize_t pqi_host_enable_r5_writes_store(struct device *dev,
6895         struct device_attribute *attr, const char *buffer, size_t count)
6896 {
6897         struct Scsi_Host *shost = class_to_shost(dev);
6898         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6899         u8 set_r5_writes = 0;
6900
6901         if (kstrtou8(buffer, 0, &set_r5_writes))
6902                 return -EINVAL;
6903
6904         if (set_r5_writes > 0)
6905                 set_r5_writes = 1;
6906
6907         ctrl_info->enable_r5_writes = set_r5_writes;
6908
6909         return count;
6910 }
6911
6912 static ssize_t pqi_host_enable_r6_writes_show(struct device *dev,
6913         struct device_attribute *attr, char *buffer)
6914 {
6915         struct Scsi_Host *shost = class_to_shost(dev);
6916         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6917
6918         return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r6_writes);
6919 }
6920
6921 static ssize_t pqi_host_enable_r6_writes_store(struct device *dev,
6922         struct device_attribute *attr, const char *buffer, size_t count)
6923 {
6924         struct Scsi_Host *shost = class_to_shost(dev);
6925         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6926         u8 set_r6_writes = 0;
6927
6928         if (kstrtou8(buffer, 0, &set_r6_writes))
6929                 return -EINVAL;
6930
6931         if (set_r6_writes > 0)
6932                 set_r6_writes = 1;
6933
6934         ctrl_info->enable_r6_writes = set_r6_writes;
6935
6936         return count;
6937 }
6938
6939 static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL);
6940 static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
6941 static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
6942 static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL);
6943 static DEVICE_ATTR(vendor, 0444, pqi_vendor_show, NULL);
6944 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
6945 static DEVICE_ATTR(lockup_action, 0644, pqi_lockup_action_show,
6946         pqi_lockup_action_store);
6947 static DEVICE_ATTR(enable_stream_detection, 0644,
6948         pqi_host_enable_stream_detection_show,
6949         pqi_host_enable_stream_detection_store);
6950 static DEVICE_ATTR(enable_r5_writes, 0644,
6951         pqi_host_enable_r5_writes_show, pqi_host_enable_r5_writes_store);
6952 static DEVICE_ATTR(enable_r6_writes, 0644,
6953         pqi_host_enable_r6_writes_show, pqi_host_enable_r6_writes_store);
6954
6955 static struct attribute *pqi_shost_attrs[] = {
6956         &dev_attr_driver_version.attr,
6957         &dev_attr_firmware_version.attr,
6958         &dev_attr_model.attr,
6959         &dev_attr_serial_number.attr,
6960         &dev_attr_vendor.attr,
6961         &dev_attr_rescan.attr,
6962         &dev_attr_lockup_action.attr,
6963         &dev_attr_enable_stream_detection.attr,
6964         &dev_attr_enable_r5_writes.attr,
6965         &dev_attr_enable_r6_writes.attr,
6966         NULL
6967 };
6968
6969 ATTRIBUTE_GROUPS(pqi_shost);
6970
6971 static ssize_t pqi_unique_id_show(struct device *dev,
6972         struct device_attribute *attr, char *buffer)
6973 {
6974         struct pqi_ctrl_info *ctrl_info;
6975         struct scsi_device *sdev;
6976         struct pqi_scsi_dev *device;
6977         unsigned long flags;
6978         u8 unique_id[16];
6979
6980         sdev = to_scsi_device(dev);
6981         ctrl_info = shost_to_hba(sdev->host);
6982
6983         if (pqi_ctrl_offline(ctrl_info))
6984                 return -ENODEV;
6985
6986         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6987
6988         device = sdev->hostdata;
6989         if (!device) {
6990                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6991                 return -ENODEV;
6992         }
6993
6994         if (device->is_physical_device)
6995                 memcpy(unique_id, device->wwid, sizeof(device->wwid));
6996         else
6997                 memcpy(unique_id, device->volume_id, sizeof(device->volume_id));
6998
6999         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7000
7001         return scnprintf(buffer, PAGE_SIZE,
7002                 "%02X%02X%02X%02X%02X%02X%02X%02X"
7003                 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
7004                 unique_id[0], unique_id[1], unique_id[2], unique_id[3],
7005                 unique_id[4], unique_id[5], unique_id[6], unique_id[7],
7006                 unique_id[8], unique_id[9], unique_id[10], unique_id[11],
7007                 unique_id[12], unique_id[13], unique_id[14], unique_id[15]);
7008 }
7009
7010 static ssize_t pqi_lunid_show(struct device *dev,
7011         struct device_attribute *attr, char *buffer)
7012 {
7013         struct pqi_ctrl_info *ctrl_info;
7014         struct scsi_device *sdev;
7015         struct pqi_scsi_dev *device;
7016         unsigned long flags;
7017         u8 lunid[8];
7018
7019         sdev = to_scsi_device(dev);
7020         ctrl_info = shost_to_hba(sdev->host);
7021
7022         if (pqi_ctrl_offline(ctrl_info))
7023                 return -ENODEV;
7024
7025         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7026
7027         device = sdev->hostdata;
7028         if (!device) {
7029                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7030                 return -ENODEV;
7031         }
7032
7033         memcpy(lunid, device->scsi3addr, sizeof(lunid));
7034
7035         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7036
7037         return scnprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
7038 }
7039
7040 #define MAX_PATHS       8
7041
7042 static ssize_t pqi_path_info_show(struct device *dev,
7043         struct device_attribute *attr, char *buf)
7044 {
7045         struct pqi_ctrl_info *ctrl_info;
7046         struct scsi_device *sdev;
7047         struct pqi_scsi_dev *device;
7048         unsigned long flags;
7049         int i;
7050         int output_len = 0;
7051         u8 box;
7052         u8 bay;
7053         u8 path_map_index;
7054         char *active;
7055         u8 phys_connector[2];
7056
7057         sdev = to_scsi_device(dev);
7058         ctrl_info = shost_to_hba(sdev->host);
7059
7060         if (pqi_ctrl_offline(ctrl_info))
7061                 return -ENODEV;
7062
7063         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7064
7065         device = sdev->hostdata;
7066         if (!device) {
7067                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7068                 return -ENODEV;
7069         }
7070
7071         bay = device->bay;
7072         for (i = 0; i < MAX_PATHS; i++) {
7073                 path_map_index = 1 << i;
7074                 if (i == device->active_path_index)
7075                         active = "Active";
7076                 else if (device->path_map & path_map_index)
7077                         active = "Inactive";
7078                 else
7079                         continue;
7080
7081                 output_len += scnprintf(buf + output_len,
7082                                         PAGE_SIZE - output_len,
7083                                         "[%d:%d:%d:%d] %20.20s ",
7084                                         ctrl_info->scsi_host->host_no,
7085                                         device->bus, device->target,
7086                                         device->lun,
7087                                         scsi_device_type(device->devtype));
7088
7089                 if (device->devtype == TYPE_RAID ||
7090                         pqi_is_logical_device(device))
7091                         goto end_buffer;
7092
7093                 memcpy(&phys_connector, &device->phys_connector[i],
7094                         sizeof(phys_connector));
7095                 if (phys_connector[0] < '0')
7096                         phys_connector[0] = '0';
7097                 if (phys_connector[1] < '0')
7098                         phys_connector[1] = '0';
7099
7100                 output_len += scnprintf(buf + output_len,
7101                                         PAGE_SIZE - output_len,
7102                                         "PORT: %.2s ", phys_connector);
7103
7104                 box = device->box[i];
7105                 if (box != 0 && box != 0xFF)
7106                         output_len += scnprintf(buf + output_len,
7107                                                 PAGE_SIZE - output_len,
7108                                                 "BOX: %hhu ", box);
7109
7110                 if ((device->devtype == TYPE_DISK ||
7111                         device->devtype == TYPE_ZBC) &&
7112                         pqi_expose_device(device))
7113                         output_len += scnprintf(buf + output_len,
7114                                                 PAGE_SIZE - output_len,
7115                                                 "BAY: %hhu ", bay);
7116
7117 end_buffer:
7118                 output_len += scnprintf(buf + output_len,
7119                                         PAGE_SIZE - output_len,
7120                                         "%s\n", active);
7121         }
7122
7123         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7124
7125         return output_len;
7126 }
7127
7128 static ssize_t pqi_sas_address_show(struct device *dev,
7129         struct device_attribute *attr, char *buffer)
7130 {
7131         struct pqi_ctrl_info *ctrl_info;
7132         struct scsi_device *sdev;
7133         struct pqi_scsi_dev *device;
7134         unsigned long flags;
7135         u64 sas_address;
7136
7137         sdev = to_scsi_device(dev);
7138         ctrl_info = shost_to_hba(sdev->host);
7139
7140         if (pqi_ctrl_offline(ctrl_info))
7141                 return -ENODEV;
7142
7143         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7144
7145         device = sdev->hostdata;
7146         if (!device) {
7147                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7148                 return -ENODEV;
7149         }
7150
7151         sas_address = device->sas_address;
7152
7153         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7154
7155         return scnprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
7156 }
7157
7158 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
7159         struct device_attribute *attr, char *buffer)
7160 {
7161         struct pqi_ctrl_info *ctrl_info;
7162         struct scsi_device *sdev;
7163         struct pqi_scsi_dev *device;
7164         unsigned long flags;
7165
7166         sdev = to_scsi_device(dev);
7167         ctrl_info = shost_to_hba(sdev->host);
7168
7169         if (pqi_ctrl_offline(ctrl_info))
7170                 return -ENODEV;
7171
7172         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7173
7174         device = sdev->hostdata;
7175         if (!device) {
7176                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7177                 return -ENODEV;
7178         }
7179
7180         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
7181         buffer[1] = '\n';
7182         buffer[2] = '\0';
7183
7184         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7185
7186         return 2;
7187 }
7188
7189 static ssize_t pqi_raid_level_show(struct device *dev,
7190         struct device_attribute *attr, char *buffer)
7191 {
7192         struct pqi_ctrl_info *ctrl_info;
7193         struct scsi_device *sdev;
7194         struct pqi_scsi_dev *device;
7195         unsigned long flags;
7196         char *raid_level;
7197
7198         sdev = to_scsi_device(dev);
7199         ctrl_info = shost_to_hba(sdev->host);
7200
7201         if (pqi_ctrl_offline(ctrl_info))
7202                 return -ENODEV;
7203
7204         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7205
7206         device = sdev->hostdata;
7207         if (!device) {
7208                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7209                 return -ENODEV;
7210         }
7211
7212         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK)
7213                 raid_level = pqi_raid_level_to_string(device->raid_level);
7214         else
7215                 raid_level = "N/A";
7216
7217         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7218
7219         return scnprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
7220 }
7221
7222 static ssize_t pqi_raid_bypass_cnt_show(struct device *dev,
7223         struct device_attribute *attr, char *buffer)
7224 {
7225         struct pqi_ctrl_info *ctrl_info;
7226         struct scsi_device *sdev;
7227         struct pqi_scsi_dev *device;
7228         unsigned long flags;
7229         unsigned int raid_bypass_cnt;
7230
7231         sdev = to_scsi_device(dev);
7232         ctrl_info = shost_to_hba(sdev->host);
7233
7234         if (pqi_ctrl_offline(ctrl_info))
7235                 return -ENODEV;
7236
7237         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7238
7239         device = sdev->hostdata;
7240         if (!device) {
7241                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7242                 return -ENODEV;
7243         }
7244
7245         raid_bypass_cnt = device->raid_bypass_cnt;
7246
7247         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7248
7249         return scnprintf(buffer, PAGE_SIZE, "0x%x\n", raid_bypass_cnt);
7250 }
7251
7252 static ssize_t pqi_sas_ncq_prio_enable_show(struct device *dev,
7253                 struct device_attribute *attr, char *buf)
7254 {
7255         struct pqi_ctrl_info *ctrl_info;
7256         struct scsi_device *sdev;
7257         struct pqi_scsi_dev *device;
7258         unsigned long flags;
7259         int output_len = 0;
7260
7261         sdev = to_scsi_device(dev);
7262         ctrl_info = shost_to_hba(sdev->host);
7263
7264         if (pqi_ctrl_offline(ctrl_info))
7265                 return -ENODEV;
7266
7267         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7268
7269         device = sdev->hostdata;
7270         if (!device) {
7271                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7272                 return -ENODEV;
7273         }
7274
7275         output_len = snprintf(buf, PAGE_SIZE, "%d\n",
7276                                 device->ncq_prio_enable);
7277         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7278
7279         return output_len;
7280 }
7281
7282 static ssize_t pqi_sas_ncq_prio_enable_store(struct device *dev,
7283                         struct device_attribute *attr,
7284                         const char *buf, size_t count)
7285 {
7286         struct pqi_ctrl_info *ctrl_info;
7287         struct scsi_device *sdev;
7288         struct pqi_scsi_dev *device;
7289         unsigned long flags;
7290         u8 ncq_prio_enable = 0;
7291
7292         if (kstrtou8(buf, 0, &ncq_prio_enable))
7293                 return -EINVAL;
7294
7295         sdev = to_scsi_device(dev);
7296         ctrl_info = shost_to_hba(sdev->host);
7297
7298         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7299
7300         device = sdev->hostdata;
7301
7302         if (!device) {
7303                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7304                 return -ENODEV;
7305         }
7306
7307         if (!device->ncq_prio_support) {
7308                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7309                 return -EINVAL;
7310         }
7311
7312         device->ncq_prio_enable = ncq_prio_enable;
7313
7314         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7315
7316         return  strlen(buf);
7317 }
7318
7319 static ssize_t pqi_numa_node_show(struct device *dev,
7320         struct device_attribute *attr, char *buffer)
7321 {
7322         struct scsi_device *sdev;
7323         struct pqi_ctrl_info *ctrl_info;
7324
7325         sdev = to_scsi_device(dev);
7326         ctrl_info = shost_to_hba(sdev->host);
7327
7328         return scnprintf(buffer, PAGE_SIZE, "%d\n", ctrl_info->numa_node);
7329 }
7330
7331 static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
7332 static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
7333 static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
7334 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
7335 static DEVICE_ATTR(ssd_smart_path_enabled, 0444, pqi_ssd_smart_path_enabled_show, NULL);
7336 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
7337 static DEVICE_ATTR(raid_bypass_cnt, 0444, pqi_raid_bypass_cnt_show, NULL);
7338 static DEVICE_ATTR(sas_ncq_prio_enable, 0644,
7339                 pqi_sas_ncq_prio_enable_show, pqi_sas_ncq_prio_enable_store);
7340 static DEVICE_ATTR(numa_node, 0444, pqi_numa_node_show, NULL);
7341
7342 static struct attribute *pqi_sdev_attrs[] = {
7343         &dev_attr_lunid.attr,
7344         &dev_attr_unique_id.attr,
7345         &dev_attr_path_info.attr,
7346         &dev_attr_sas_address.attr,
7347         &dev_attr_ssd_smart_path_enabled.attr,
7348         &dev_attr_raid_level.attr,
7349         &dev_attr_raid_bypass_cnt.attr,
7350         &dev_attr_sas_ncq_prio_enable.attr,
7351         &dev_attr_numa_node.attr,
7352         NULL
7353 };
7354
7355 ATTRIBUTE_GROUPS(pqi_sdev);
7356
7357 static const struct scsi_host_template pqi_driver_template = {
7358         .module = THIS_MODULE,
7359         .name = DRIVER_NAME_SHORT,
7360         .proc_name = DRIVER_NAME_SHORT,
7361         .queuecommand = pqi_scsi_queue_command,
7362         .scan_start = pqi_scan_start,
7363         .scan_finished = pqi_scan_finished,
7364         .this_id = -1,
7365         .eh_device_reset_handler = pqi_eh_device_reset_handler,
7366         .ioctl = pqi_ioctl,
7367         .slave_alloc = pqi_slave_alloc,
7368         .slave_configure = pqi_slave_configure,
7369         .slave_destroy = pqi_slave_destroy,
7370         .map_queues = pqi_map_queues,
7371         .sdev_groups = pqi_sdev_groups,
7372         .shost_groups = pqi_shost_groups,
7373         .cmd_size = sizeof(struct pqi_cmd_priv),
7374 };
7375
7376 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
7377 {
7378         int rc;
7379         struct Scsi_Host *shost;
7380
7381         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
7382         if (!shost) {
7383                 dev_err(&ctrl_info->pci_dev->dev, "scsi_host_alloc failed\n");
7384                 return -ENOMEM;
7385         }
7386
7387         shost->io_port = 0;
7388         shost->n_io_port = 0;
7389         shost->this_id = -1;
7390         shost->max_channel = PQI_MAX_BUS;
7391         shost->max_cmd_len = MAX_COMMAND_SIZE;
7392         shost->max_lun = PQI_MAX_LUNS_PER_DEVICE;
7393         shost->max_id = ~0;
7394         shost->max_sectors = ctrl_info->max_sectors;
7395         shost->can_queue = ctrl_info->scsi_ml_can_queue;
7396         shost->cmd_per_lun = shost->can_queue;
7397         shost->sg_tablesize = ctrl_info->sg_tablesize;
7398         shost->transportt = pqi_sas_transport_template;
7399         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
7400         shost->unique_id = shost->irq;
7401         shost->nr_hw_queues = ctrl_info->num_queue_groups;
7402         shost->host_tagset = 1;
7403         shost->hostdata[0] = (unsigned long)ctrl_info;
7404
7405         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
7406         if (rc) {
7407                 dev_err(&ctrl_info->pci_dev->dev, "scsi_add_host failed\n");
7408                 goto free_host;
7409         }
7410
7411         rc = pqi_add_sas_host(shost, ctrl_info);
7412         if (rc) {
7413                 dev_err(&ctrl_info->pci_dev->dev, "add SAS host failed\n");
7414                 goto remove_host;
7415         }
7416
7417         ctrl_info->scsi_host = shost;
7418
7419         return 0;
7420
7421 remove_host:
7422         scsi_remove_host(shost);
7423 free_host:
7424         scsi_host_put(shost);
7425
7426         return rc;
7427 }
7428
7429 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
7430 {
7431         struct Scsi_Host *shost;
7432
7433         pqi_delete_sas_host(ctrl_info);
7434
7435         shost = ctrl_info->scsi_host;
7436         if (!shost)
7437                 return;
7438
7439         scsi_remove_host(shost);
7440         scsi_host_put(shost);
7441 }
7442
7443 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
7444 {
7445         int rc = 0;
7446         struct pqi_device_registers __iomem *pqi_registers;
7447         unsigned long timeout;
7448         unsigned int timeout_msecs;
7449         union pqi_reset_register reset_reg;
7450
7451         pqi_registers = ctrl_info->pqi_registers;
7452         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
7453         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
7454
7455         while (1) {
7456                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
7457                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
7458                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
7459                         break;
7460                 if (!sis_is_firmware_running(ctrl_info)) {
7461                         rc = -ENXIO;
7462                         break;
7463                 }
7464                 if (time_after(jiffies, timeout)) {
7465                         rc = -ETIMEDOUT;
7466                         break;
7467                 }
7468         }
7469
7470         return rc;
7471 }
7472
7473 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
7474 {
7475         int rc;
7476         union pqi_reset_register reset_reg;
7477
7478         if (ctrl_info->pqi_reset_quiesce_supported) {
7479                 rc = sis_pqi_reset_quiesce(ctrl_info);
7480                 if (rc) {
7481                         dev_err(&ctrl_info->pci_dev->dev,
7482                                 "PQI reset failed during quiesce with error %d\n", rc);
7483                         return rc;
7484                 }
7485         }
7486
7487         reset_reg.all_bits = 0;
7488         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
7489         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
7490
7491         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
7492
7493         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
7494         if (rc)
7495                 dev_err(&ctrl_info->pci_dev->dev,
7496                         "PQI reset failed with error %d\n", rc);
7497
7498         return rc;
7499 }
7500
7501 static int pqi_get_ctrl_serial_number(struct pqi_ctrl_info *ctrl_info)
7502 {
7503         int rc;
7504         struct bmic_sense_subsystem_info *sense_info;
7505
7506         sense_info = kzalloc(sizeof(*sense_info), GFP_KERNEL);
7507         if (!sense_info)
7508                 return -ENOMEM;
7509
7510         rc = pqi_sense_subsystem_info(ctrl_info, sense_info);
7511         if (rc)
7512                 goto out;
7513
7514         memcpy(ctrl_info->serial_number, sense_info->ctrl_serial_number,
7515                 sizeof(sense_info->ctrl_serial_number));
7516         ctrl_info->serial_number[sizeof(sense_info->ctrl_serial_number)] = '\0';
7517
7518 out:
7519         kfree(sense_info);
7520
7521         return rc;
7522 }
7523
7524 static int pqi_get_ctrl_product_details(struct pqi_ctrl_info *ctrl_info)
7525 {
7526         int rc;
7527         struct bmic_identify_controller *identify;
7528
7529         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
7530         if (!identify)
7531                 return -ENOMEM;
7532
7533         rc = pqi_identify_controller(ctrl_info, identify);
7534         if (rc)
7535                 goto out;
7536
7537         if (get_unaligned_le32(&identify->extra_controller_flags) &
7538                 BMIC_IDENTIFY_EXTRA_FLAGS_LONG_FW_VERSION_SUPPORTED) {
7539                 memcpy(ctrl_info->firmware_version,
7540                         identify->firmware_version_long,
7541                         sizeof(identify->firmware_version_long));
7542         } else {
7543                 memcpy(ctrl_info->firmware_version,
7544                         identify->firmware_version_short,
7545                         sizeof(identify->firmware_version_short));
7546                 ctrl_info->firmware_version
7547                         [sizeof(identify->firmware_version_short)] = '\0';
7548                 snprintf(ctrl_info->firmware_version +
7549                         strlen(ctrl_info->firmware_version),
7550                         sizeof(ctrl_info->firmware_version) -
7551                         sizeof(identify->firmware_version_short),
7552                         "-%u",
7553                         get_unaligned_le16(&identify->firmware_build_number));
7554         }
7555
7556         memcpy(ctrl_info->model, identify->product_id,
7557                 sizeof(identify->product_id));
7558         ctrl_info->model[sizeof(identify->product_id)] = '\0';
7559
7560         memcpy(ctrl_info->vendor, identify->vendor_id,
7561                 sizeof(identify->vendor_id));
7562         ctrl_info->vendor[sizeof(identify->vendor_id)] = '\0';
7563
7564         dev_info(&ctrl_info->pci_dev->dev,
7565                 "Firmware version: %s\n", ctrl_info->firmware_version);
7566
7567 out:
7568         kfree(identify);
7569
7570         return rc;
7571 }
7572
7573 struct pqi_config_table_section_info {
7574         struct pqi_ctrl_info *ctrl_info;
7575         void            *section;
7576         u32             section_offset;
7577         void __iomem    *section_iomem_addr;
7578 };
7579
7580 static inline bool pqi_is_firmware_feature_supported(
7581         struct pqi_config_table_firmware_features *firmware_features,
7582         unsigned int bit_position)
7583 {
7584         unsigned int byte_index;
7585
7586         byte_index = bit_position / BITS_PER_BYTE;
7587
7588         if (byte_index >= le16_to_cpu(firmware_features->num_elements))
7589                 return false;
7590
7591         return firmware_features->features_supported[byte_index] &
7592                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7593 }
7594
7595 static inline bool pqi_is_firmware_feature_enabled(
7596         struct pqi_config_table_firmware_features *firmware_features,
7597         void __iomem *firmware_features_iomem_addr,
7598         unsigned int bit_position)
7599 {
7600         unsigned int byte_index;
7601         u8 __iomem *features_enabled_iomem_addr;
7602
7603         byte_index = (bit_position / BITS_PER_BYTE) +
7604                 (le16_to_cpu(firmware_features->num_elements) * 2);
7605
7606         features_enabled_iomem_addr = firmware_features_iomem_addr +
7607                 offsetof(struct pqi_config_table_firmware_features,
7608                         features_supported) + byte_index;
7609
7610         return *((__force u8 *)features_enabled_iomem_addr) &
7611                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7612 }
7613
7614 static inline void pqi_request_firmware_feature(
7615         struct pqi_config_table_firmware_features *firmware_features,
7616         unsigned int bit_position)
7617 {
7618         unsigned int byte_index;
7619
7620         byte_index = (bit_position / BITS_PER_BYTE) +
7621                 le16_to_cpu(firmware_features->num_elements);
7622
7623         firmware_features->features_supported[byte_index] |=
7624                 (1 << (bit_position % BITS_PER_BYTE));
7625 }
7626
7627 static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
7628         u16 first_section, u16 last_section)
7629 {
7630         struct pqi_vendor_general_request request;
7631
7632         memset(&request, 0, sizeof(request));
7633
7634         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
7635         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
7636                 &request.header.iu_length);
7637         put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
7638                 &request.function_code);
7639         put_unaligned_le16(first_section,
7640                 &request.data.config_table_update.first_section);
7641         put_unaligned_le16(last_section,
7642                 &request.data.config_table_update.last_section);
7643
7644         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
7645 }
7646
7647 static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
7648         struct pqi_config_table_firmware_features *firmware_features,
7649         void __iomem *firmware_features_iomem_addr)
7650 {
7651         void *features_requested;
7652         void __iomem *features_requested_iomem_addr;
7653         void __iomem *host_max_known_feature_iomem_addr;
7654
7655         features_requested = firmware_features->features_supported +
7656                 le16_to_cpu(firmware_features->num_elements);
7657
7658         features_requested_iomem_addr = firmware_features_iomem_addr +
7659                 (features_requested - (void *)firmware_features);
7660
7661         memcpy_toio(features_requested_iomem_addr, features_requested,
7662                 le16_to_cpu(firmware_features->num_elements));
7663
7664         if (pqi_is_firmware_feature_supported(firmware_features,
7665                 PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE)) {
7666                 host_max_known_feature_iomem_addr =
7667                         features_requested_iomem_addr +
7668                         (le16_to_cpu(firmware_features->num_elements) * 2) +
7669                         sizeof(__le16);
7670                 writeb(PQI_FIRMWARE_FEATURE_MAXIMUM & 0xFF, host_max_known_feature_iomem_addr);
7671                 writeb((PQI_FIRMWARE_FEATURE_MAXIMUM & 0xFF00) >> 8, host_max_known_feature_iomem_addr + 1);
7672         }
7673
7674         return pqi_config_table_update(ctrl_info,
7675                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
7676                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
7677 }
7678
7679 struct pqi_firmware_feature {
7680         char            *feature_name;
7681         unsigned int    feature_bit;
7682         bool            supported;
7683         bool            enabled;
7684         void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
7685                 struct pqi_firmware_feature *firmware_feature);
7686 };
7687
7688 static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
7689         struct pqi_firmware_feature *firmware_feature)
7690 {
7691         if (!firmware_feature->supported) {
7692                 dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
7693                         firmware_feature->feature_name);
7694                 return;
7695         }
7696
7697         if (firmware_feature->enabled) {
7698                 dev_info(&ctrl_info->pci_dev->dev,
7699                         "%s enabled\n", firmware_feature->feature_name);
7700                 return;
7701         }
7702
7703         dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
7704                 firmware_feature->feature_name);
7705 }
7706
7707 static void pqi_ctrl_update_feature_flags(struct pqi_ctrl_info *ctrl_info,
7708         struct pqi_firmware_feature *firmware_feature)
7709 {
7710         switch (firmware_feature->feature_bit) {
7711         case PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS:
7712                 ctrl_info->enable_r1_writes = firmware_feature->enabled;
7713                 break;
7714         case PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS:
7715                 ctrl_info->enable_r5_writes = firmware_feature->enabled;
7716                 break;
7717         case PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS:
7718                 ctrl_info->enable_r6_writes = firmware_feature->enabled;
7719                 break;
7720         case PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE:
7721                 ctrl_info->soft_reset_handshake_supported =
7722                         firmware_feature->enabled &&
7723                         pqi_read_soft_reset_status(ctrl_info);
7724                 break;
7725         case PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT:
7726                 ctrl_info->raid_iu_timeout_supported = firmware_feature->enabled;
7727                 break;
7728         case PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT:
7729                 ctrl_info->tmf_iu_timeout_supported = firmware_feature->enabled;
7730                 break;
7731         case PQI_FIRMWARE_FEATURE_FW_TRIAGE:
7732                 ctrl_info->firmware_triage_supported = firmware_feature->enabled;
7733                 pqi_save_fw_triage_setting(ctrl_info, firmware_feature->enabled);
7734                 break;
7735         case PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5:
7736                 ctrl_info->rpl_extended_format_4_5_supported = firmware_feature->enabled;
7737                 break;
7738         case PQI_FIRMWARE_FEATURE_MULTI_LUN_DEVICE_SUPPORT:
7739                 ctrl_info->multi_lun_device_supported = firmware_feature->enabled;
7740                 break;
7741         }
7742
7743         pqi_firmware_feature_status(ctrl_info, firmware_feature);
7744 }
7745
7746 static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
7747         struct pqi_firmware_feature *firmware_feature)
7748 {
7749         if (firmware_feature->feature_status)
7750                 firmware_feature->feature_status(ctrl_info, firmware_feature);
7751 }
7752
7753 static DEFINE_MUTEX(pqi_firmware_features_mutex);
7754
7755 static struct pqi_firmware_feature pqi_firmware_features[] = {
7756         {
7757                 .feature_name = "Online Firmware Activation",
7758                 .feature_bit = PQI_FIRMWARE_FEATURE_OFA,
7759                 .feature_status = pqi_firmware_feature_status,
7760         },
7761         {
7762                 .feature_name = "Serial Management Protocol",
7763                 .feature_bit = PQI_FIRMWARE_FEATURE_SMP,
7764                 .feature_status = pqi_firmware_feature_status,
7765         },
7766         {
7767                 .feature_name = "Maximum Known Feature",
7768                 .feature_bit = PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE,
7769                 .feature_status = pqi_firmware_feature_status,
7770         },
7771         {
7772                 .feature_name = "RAID 0 Read Bypass",
7773                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_READ_BYPASS,
7774                 .feature_status = pqi_firmware_feature_status,
7775         },
7776         {
7777                 .feature_name = "RAID 1 Read Bypass",
7778                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_READ_BYPASS,
7779                 .feature_status = pqi_firmware_feature_status,
7780         },
7781         {
7782                 .feature_name = "RAID 5 Read Bypass",
7783                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_READ_BYPASS,
7784                 .feature_status = pqi_firmware_feature_status,
7785         },
7786         {
7787                 .feature_name = "RAID 6 Read Bypass",
7788                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_READ_BYPASS,
7789                 .feature_status = pqi_firmware_feature_status,
7790         },
7791         {
7792                 .feature_name = "RAID 0 Write Bypass",
7793                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_WRITE_BYPASS,
7794                 .feature_status = pqi_firmware_feature_status,
7795         },
7796         {
7797                 .feature_name = "RAID 1 Write Bypass",
7798                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS,
7799                 .feature_status = pqi_ctrl_update_feature_flags,
7800         },
7801         {
7802                 .feature_name = "RAID 5 Write Bypass",
7803                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS,
7804                 .feature_status = pqi_ctrl_update_feature_flags,
7805         },
7806         {
7807                 .feature_name = "RAID 6 Write Bypass",
7808                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS,
7809                 .feature_status = pqi_ctrl_update_feature_flags,
7810         },
7811         {
7812                 .feature_name = "New Soft Reset Handshake",
7813                 .feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
7814                 .feature_status = pqi_ctrl_update_feature_flags,
7815         },
7816         {
7817                 .feature_name = "RAID IU Timeout",
7818                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT,
7819                 .feature_status = pqi_ctrl_update_feature_flags,
7820         },
7821         {
7822                 .feature_name = "TMF IU Timeout",
7823                 .feature_bit = PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT,
7824                 .feature_status = pqi_ctrl_update_feature_flags,
7825         },
7826         {
7827                 .feature_name = "RAID Bypass on encrypted logical volumes on NVMe",
7828                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_BYPASS_ON_ENCRYPTED_NVME,
7829                 .feature_status = pqi_firmware_feature_status,
7830         },
7831         {
7832                 .feature_name = "Firmware Triage",
7833                 .feature_bit = PQI_FIRMWARE_FEATURE_FW_TRIAGE,
7834                 .feature_status = pqi_ctrl_update_feature_flags,
7835         },
7836         {
7837                 .feature_name = "RPL Extended Formats 4 and 5",
7838                 .feature_bit = PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5,
7839                 .feature_status = pqi_ctrl_update_feature_flags,
7840         },
7841         {
7842                 .feature_name = "Multi-LUN Target",
7843                 .feature_bit = PQI_FIRMWARE_FEATURE_MULTI_LUN_DEVICE_SUPPORT,
7844                 .feature_status = pqi_ctrl_update_feature_flags,
7845         },
7846 };
7847
7848 static void pqi_process_firmware_features(
7849         struct pqi_config_table_section_info *section_info)
7850 {
7851         int rc;
7852         struct pqi_ctrl_info *ctrl_info;
7853         struct pqi_config_table_firmware_features *firmware_features;
7854         void __iomem *firmware_features_iomem_addr;
7855         unsigned int i;
7856         unsigned int num_features_supported;
7857
7858         ctrl_info = section_info->ctrl_info;
7859         firmware_features = section_info->section;
7860         firmware_features_iomem_addr = section_info->section_iomem_addr;
7861
7862         for (i = 0, num_features_supported = 0;
7863                 i < ARRAY_SIZE(pqi_firmware_features); i++) {
7864                 if (pqi_is_firmware_feature_supported(firmware_features,
7865                         pqi_firmware_features[i].feature_bit)) {
7866                         pqi_firmware_features[i].supported = true;
7867                         num_features_supported++;
7868                 } else {
7869                         pqi_firmware_feature_update(ctrl_info,
7870                                 &pqi_firmware_features[i]);
7871                 }
7872         }
7873
7874         if (num_features_supported == 0)
7875                 return;
7876
7877         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7878                 if (!pqi_firmware_features[i].supported)
7879                         continue;
7880                 pqi_request_firmware_feature(firmware_features,
7881                         pqi_firmware_features[i].feature_bit);
7882         }
7883
7884         rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
7885                 firmware_features_iomem_addr);
7886         if (rc) {
7887                 dev_err(&ctrl_info->pci_dev->dev,
7888                         "failed to enable firmware features in PQI configuration table\n");
7889                 for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7890                         if (!pqi_firmware_features[i].supported)
7891                                 continue;
7892                         pqi_firmware_feature_update(ctrl_info,
7893                                 &pqi_firmware_features[i]);
7894                 }
7895                 return;
7896         }
7897
7898         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7899                 if (!pqi_firmware_features[i].supported)
7900                         continue;
7901                 if (pqi_is_firmware_feature_enabled(firmware_features,
7902                         firmware_features_iomem_addr,
7903                         pqi_firmware_features[i].feature_bit)) {
7904                                 pqi_firmware_features[i].enabled = true;
7905                 }
7906                 pqi_firmware_feature_update(ctrl_info,
7907                         &pqi_firmware_features[i]);
7908         }
7909 }
7910
7911 static void pqi_init_firmware_features(void)
7912 {
7913         unsigned int i;
7914
7915         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7916                 pqi_firmware_features[i].supported = false;
7917                 pqi_firmware_features[i].enabled = false;
7918         }
7919 }
7920
7921 static void pqi_process_firmware_features_section(
7922         struct pqi_config_table_section_info *section_info)
7923 {
7924         mutex_lock(&pqi_firmware_features_mutex);
7925         pqi_init_firmware_features();
7926         pqi_process_firmware_features(section_info);
7927         mutex_unlock(&pqi_firmware_features_mutex);
7928 }
7929
7930 /*
7931  * Reset all controller settings that can be initialized during the processing
7932  * of the PQI Configuration Table.
7933  */
7934
7935 static void pqi_ctrl_reset_config(struct pqi_ctrl_info *ctrl_info)
7936 {
7937         ctrl_info->heartbeat_counter = NULL;
7938         ctrl_info->soft_reset_status = NULL;
7939         ctrl_info->soft_reset_handshake_supported = false;
7940         ctrl_info->enable_r1_writes = false;
7941         ctrl_info->enable_r5_writes = false;
7942         ctrl_info->enable_r6_writes = false;
7943         ctrl_info->raid_iu_timeout_supported = false;
7944         ctrl_info->tmf_iu_timeout_supported = false;
7945         ctrl_info->firmware_triage_supported = false;
7946         ctrl_info->rpl_extended_format_4_5_supported = false;
7947         ctrl_info->multi_lun_device_supported = false;
7948 }
7949
7950 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
7951 {
7952         u32 table_length;
7953         u32 section_offset;
7954         bool firmware_feature_section_present;
7955         void __iomem *table_iomem_addr;
7956         struct pqi_config_table *config_table;
7957         struct pqi_config_table_section_header *section;
7958         struct pqi_config_table_section_info section_info;
7959         struct pqi_config_table_section_info feature_section_info = {0};
7960
7961         table_length = ctrl_info->config_table_length;
7962         if (table_length == 0)
7963                 return 0;
7964
7965         config_table = kmalloc(table_length, GFP_KERNEL);
7966         if (!config_table) {
7967                 dev_err(&ctrl_info->pci_dev->dev,
7968                         "failed to allocate memory for PQI configuration table\n");
7969                 return -ENOMEM;
7970         }
7971
7972         /*
7973          * Copy the config table contents from I/O memory space into the
7974          * temporary buffer.
7975          */
7976         table_iomem_addr = ctrl_info->iomem_base + ctrl_info->config_table_offset;
7977         memcpy_fromio(config_table, table_iomem_addr, table_length);
7978
7979         firmware_feature_section_present = false;
7980         section_info.ctrl_info = ctrl_info;
7981         section_offset = get_unaligned_le32(&config_table->first_section_offset);
7982
7983         while (section_offset) {
7984                 section = (void *)config_table + section_offset;
7985
7986                 section_info.section = section;
7987                 section_info.section_offset = section_offset;
7988                 section_info.section_iomem_addr = table_iomem_addr + section_offset;
7989
7990                 switch (get_unaligned_le16(&section->section_id)) {
7991                 case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
7992                         firmware_feature_section_present = true;
7993                         feature_section_info = section_info;
7994                         break;
7995                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
7996                         if (pqi_disable_heartbeat)
7997                                 dev_warn(&ctrl_info->pci_dev->dev,
7998                                 "heartbeat disabled by module parameter\n");
7999                         else
8000                                 ctrl_info->heartbeat_counter =
8001                                         table_iomem_addr +
8002                                         section_offset +
8003                                         offsetof(struct pqi_config_table_heartbeat,
8004                                                 heartbeat_counter);
8005                         break;
8006                 case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
8007                         ctrl_info->soft_reset_status =
8008                                 table_iomem_addr +
8009                                 section_offset +
8010                                 offsetof(struct pqi_config_table_soft_reset,
8011                                         soft_reset_status);
8012                         break;
8013                 }
8014
8015                 section_offset = get_unaligned_le16(&section->next_section_offset);
8016         }
8017
8018         /*
8019          * We process the firmware feature section after all other sections
8020          * have been processed so that the feature bit callbacks can take
8021          * into account the settings configured by other sections.
8022          */
8023         if (firmware_feature_section_present)
8024                 pqi_process_firmware_features_section(&feature_section_info);
8025
8026         kfree(config_table);
8027
8028         return 0;
8029 }
8030
8031 /* Switches the controller from PQI mode back into SIS mode. */
8032
8033 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
8034 {
8035         int rc;
8036
8037         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
8038         rc = pqi_reset(ctrl_info);
8039         if (rc)
8040                 return rc;
8041         rc = sis_reenable_sis_mode(ctrl_info);
8042         if (rc) {
8043                 dev_err(&ctrl_info->pci_dev->dev,
8044                         "re-enabling SIS mode failed with error %d\n", rc);
8045                 return rc;
8046         }
8047         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
8048
8049         return 0;
8050 }
8051
8052 /*
8053  * If the controller isn't already in SIS mode, this function forces it into
8054  * SIS mode.
8055  */
8056
8057 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
8058 {
8059         if (!sis_is_firmware_running(ctrl_info))
8060                 return -ENXIO;
8061
8062         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
8063                 return 0;
8064
8065         if (sis_is_kernel_up(ctrl_info)) {
8066                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
8067                 return 0;
8068         }
8069
8070         return pqi_revert_to_sis_mode(ctrl_info);
8071 }
8072
8073 static void pqi_perform_lockup_action(void)
8074 {
8075         switch (pqi_lockup_action) {
8076         case PANIC:
8077                 panic("FATAL: Smart Family Controller lockup detected");
8078                 break;
8079         case REBOOT:
8080                 emergency_restart();
8081                 break;
8082         case NONE:
8083         default:
8084                 break;
8085         }
8086 }
8087
8088 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
8089 {
8090         int rc;
8091         u32 product_id;
8092
8093         if (reset_devices) {
8094                 if (pqi_is_fw_triage_supported(ctrl_info)) {
8095                         rc = sis_wait_for_fw_triage_completion(ctrl_info);
8096                         if (rc)
8097                                 return rc;
8098                 }
8099                 sis_soft_reset(ctrl_info);
8100                 ssleep(PQI_POST_RESET_DELAY_SECS);
8101         } else {
8102                 rc = pqi_force_sis_mode(ctrl_info);
8103                 if (rc)
8104                         return rc;
8105         }
8106
8107         /*
8108          * Wait until the controller is ready to start accepting SIS
8109          * commands.
8110          */
8111         rc = sis_wait_for_ctrl_ready(ctrl_info);
8112         if (rc) {
8113                 if (reset_devices) {
8114                         dev_err(&ctrl_info->pci_dev->dev,
8115                                 "kdump init failed with error %d\n", rc);
8116                         pqi_lockup_action = REBOOT;
8117                         pqi_perform_lockup_action();
8118                 }
8119                 return rc;
8120         }
8121
8122         /*
8123          * Get the controller properties.  This allows us to determine
8124          * whether or not it supports PQI mode.
8125          */
8126         rc = sis_get_ctrl_properties(ctrl_info);
8127         if (rc) {
8128                 dev_err(&ctrl_info->pci_dev->dev,
8129                         "error obtaining controller properties\n");
8130                 return rc;
8131         }
8132
8133         rc = sis_get_pqi_capabilities(ctrl_info);
8134         if (rc) {
8135                 dev_err(&ctrl_info->pci_dev->dev,
8136                         "error obtaining controller capabilities\n");
8137                 return rc;
8138         }
8139
8140         product_id = sis_get_product_id(ctrl_info);
8141         ctrl_info->product_id = (u8)product_id;
8142         ctrl_info->product_revision = (u8)(product_id >> 8);
8143
8144         if (reset_devices) {
8145                 if (ctrl_info->max_outstanding_requests >
8146                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
8147                                 ctrl_info->max_outstanding_requests =
8148                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
8149         } else {
8150                 if (ctrl_info->max_outstanding_requests >
8151                         PQI_MAX_OUTSTANDING_REQUESTS)
8152                                 ctrl_info->max_outstanding_requests =
8153                                         PQI_MAX_OUTSTANDING_REQUESTS;
8154         }
8155
8156         pqi_calculate_io_resources(ctrl_info);
8157
8158         rc = pqi_alloc_error_buffer(ctrl_info);
8159         if (rc) {
8160                 dev_err(&ctrl_info->pci_dev->dev,
8161                         "failed to allocate PQI error buffer\n");
8162                 return rc;
8163         }
8164
8165         /*
8166          * If the function we are about to call succeeds, the
8167          * controller will transition from legacy SIS mode
8168          * into PQI mode.
8169          */
8170         rc = sis_init_base_struct_addr(ctrl_info);
8171         if (rc) {
8172                 dev_err(&ctrl_info->pci_dev->dev,
8173                         "error initializing PQI mode\n");
8174                 return rc;
8175         }
8176
8177         /* Wait for the controller to complete the SIS -> PQI transition. */
8178         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
8179         if (rc) {
8180                 dev_err(&ctrl_info->pci_dev->dev,
8181                         "transition to PQI mode failed\n");
8182                 return rc;
8183         }
8184
8185         /* From here on, we are running in PQI mode. */
8186         ctrl_info->pqi_mode_enabled = true;
8187         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
8188
8189         rc = pqi_alloc_admin_queues(ctrl_info);
8190         if (rc) {
8191                 dev_err(&ctrl_info->pci_dev->dev,
8192                         "failed to allocate admin queues\n");
8193                 return rc;
8194         }
8195
8196         rc = pqi_create_admin_queues(ctrl_info);
8197         if (rc) {
8198                 dev_err(&ctrl_info->pci_dev->dev,
8199                         "error creating admin queues\n");
8200                 return rc;
8201         }
8202
8203         rc = pqi_report_device_capability(ctrl_info);
8204         if (rc) {
8205                 dev_err(&ctrl_info->pci_dev->dev,
8206                         "obtaining device capability failed\n");
8207                 return rc;
8208         }
8209
8210         rc = pqi_validate_device_capability(ctrl_info);
8211         if (rc)
8212                 return rc;
8213
8214         pqi_calculate_queue_resources(ctrl_info);
8215
8216         rc = pqi_enable_msix_interrupts(ctrl_info);
8217         if (rc)
8218                 return rc;
8219
8220         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
8221                 ctrl_info->max_msix_vectors =
8222                         ctrl_info->num_msix_vectors_enabled;
8223                 pqi_calculate_queue_resources(ctrl_info);
8224         }
8225
8226         rc = pqi_alloc_io_resources(ctrl_info);
8227         if (rc)
8228                 return rc;
8229
8230         rc = pqi_alloc_operational_queues(ctrl_info);
8231         if (rc) {
8232                 dev_err(&ctrl_info->pci_dev->dev,
8233                         "failed to allocate operational queues\n");
8234                 return rc;
8235         }
8236
8237         pqi_init_operational_queues(ctrl_info);
8238
8239         rc = pqi_create_queues(ctrl_info);
8240         if (rc)
8241                 return rc;
8242
8243         rc = pqi_request_irqs(ctrl_info);
8244         if (rc)
8245                 return rc;
8246
8247         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
8248
8249         ctrl_info->controller_online = true;
8250
8251         rc = pqi_process_config_table(ctrl_info);
8252         if (rc)
8253                 return rc;
8254
8255         pqi_start_heartbeat_timer(ctrl_info);
8256
8257         if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8258                 rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8259                 if (rc) { /* Supported features not returned correctly. */
8260                         dev_err(&ctrl_info->pci_dev->dev,
8261                                 "error obtaining advanced RAID bypass configuration\n");
8262                         return rc;
8263                 }
8264                 ctrl_info->ciss_report_log_flags |=
8265                         CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8266         }
8267
8268         rc = pqi_enable_events(ctrl_info);
8269         if (rc) {
8270                 dev_err(&ctrl_info->pci_dev->dev,
8271                         "error enabling events\n");
8272                 return rc;
8273         }
8274
8275         /* Register with the SCSI subsystem. */
8276         rc = pqi_register_scsi(ctrl_info);
8277         if (rc)
8278                 return rc;
8279
8280         rc = pqi_get_ctrl_product_details(ctrl_info);
8281         if (rc) {
8282                 dev_err(&ctrl_info->pci_dev->dev,
8283                         "error obtaining product details\n");
8284                 return rc;
8285         }
8286
8287         rc = pqi_get_ctrl_serial_number(ctrl_info);
8288         if (rc) {
8289                 dev_err(&ctrl_info->pci_dev->dev,
8290                         "error obtaining ctrl serial number\n");
8291                 return rc;
8292         }
8293
8294         rc = pqi_set_diag_rescan(ctrl_info);
8295         if (rc) {
8296                 dev_err(&ctrl_info->pci_dev->dev,
8297                         "error enabling multi-lun rescan\n");
8298                 return rc;
8299         }
8300
8301         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8302         if (rc) {
8303                 dev_err(&ctrl_info->pci_dev->dev,
8304                         "error updating host wellness\n");
8305                 return rc;
8306         }
8307
8308         pqi_schedule_update_time_worker(ctrl_info);
8309
8310         pqi_scan_scsi_devices(ctrl_info);
8311
8312         return 0;
8313 }
8314
8315 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
8316 {
8317         unsigned int i;
8318         struct pqi_admin_queues *admin_queues;
8319         struct pqi_event_queue *event_queue;
8320
8321         admin_queues = &ctrl_info->admin_queues;
8322         admin_queues->iq_pi_copy = 0;
8323         admin_queues->oq_ci_copy = 0;
8324         writel(0, admin_queues->oq_pi);
8325
8326         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
8327                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
8328                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
8329                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
8330
8331                 writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
8332                 writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
8333                 writel(0, ctrl_info->queue_groups[i].oq_pi);
8334         }
8335
8336         event_queue = &ctrl_info->event_queue;
8337         writel(0, event_queue->oq_pi);
8338         event_queue->oq_ci_copy = 0;
8339 }
8340
8341 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
8342 {
8343         int rc;
8344
8345         rc = pqi_force_sis_mode(ctrl_info);
8346         if (rc)
8347                 return rc;
8348
8349         /*
8350          * Wait until the controller is ready to start accepting SIS
8351          * commands.
8352          */
8353         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
8354         if (rc)
8355                 return rc;
8356
8357         /*
8358          * Get the controller properties.  This allows us to determine
8359          * whether or not it supports PQI mode.
8360          */
8361         rc = sis_get_ctrl_properties(ctrl_info);
8362         if (rc) {
8363                 dev_err(&ctrl_info->pci_dev->dev,
8364                         "error obtaining controller properties\n");
8365                 return rc;
8366         }
8367
8368         rc = sis_get_pqi_capabilities(ctrl_info);
8369         if (rc) {
8370                 dev_err(&ctrl_info->pci_dev->dev,
8371                         "error obtaining controller capabilities\n");
8372                 return rc;
8373         }
8374
8375         /*
8376          * If the function we are about to call succeeds, the
8377          * controller will transition from legacy SIS mode
8378          * into PQI mode.
8379          */
8380         rc = sis_init_base_struct_addr(ctrl_info);
8381         if (rc) {
8382                 dev_err(&ctrl_info->pci_dev->dev,
8383                         "error initializing PQI mode\n");
8384                 return rc;
8385         }
8386
8387         /* Wait for the controller to complete the SIS -> PQI transition. */
8388         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
8389         if (rc) {
8390                 dev_err(&ctrl_info->pci_dev->dev,
8391                         "transition to PQI mode failed\n");
8392                 return rc;
8393         }
8394
8395         /* From here on, we are running in PQI mode. */
8396         ctrl_info->pqi_mode_enabled = true;
8397         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
8398
8399         pqi_reinit_queues(ctrl_info);
8400
8401         rc = pqi_create_admin_queues(ctrl_info);
8402         if (rc) {
8403                 dev_err(&ctrl_info->pci_dev->dev,
8404                         "error creating admin queues\n");
8405                 return rc;
8406         }
8407
8408         rc = pqi_create_queues(ctrl_info);
8409         if (rc)
8410                 return rc;
8411
8412         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
8413
8414         ctrl_info->controller_online = true;
8415         pqi_ctrl_unblock_requests(ctrl_info);
8416
8417         pqi_ctrl_reset_config(ctrl_info);
8418
8419         rc = pqi_process_config_table(ctrl_info);
8420         if (rc)
8421                 return rc;
8422
8423         pqi_start_heartbeat_timer(ctrl_info);
8424
8425         if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8426                 rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8427                 if (rc) {
8428                         dev_err(&ctrl_info->pci_dev->dev,
8429                                 "error obtaining advanced RAID bypass configuration\n");
8430                         return rc;
8431                 }
8432                 ctrl_info->ciss_report_log_flags |=
8433                         CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8434         }
8435
8436         rc = pqi_enable_events(ctrl_info);
8437         if (rc) {
8438                 dev_err(&ctrl_info->pci_dev->dev,
8439                         "error enabling events\n");
8440                 return rc;
8441         }
8442
8443         rc = pqi_get_ctrl_product_details(ctrl_info);
8444         if (rc) {
8445                 dev_err(&ctrl_info->pci_dev->dev,
8446                         "error obtaining product details\n");
8447                 return rc;
8448         }
8449
8450         rc = pqi_set_diag_rescan(ctrl_info);
8451         if (rc) {
8452                 dev_err(&ctrl_info->pci_dev->dev,
8453                         "error enabling multi-lun rescan\n");
8454                 return rc;
8455         }
8456
8457         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8458         if (rc) {
8459                 dev_err(&ctrl_info->pci_dev->dev,
8460                         "error updating host wellness\n");
8461                 return rc;
8462         }
8463
8464         if (pqi_ofa_in_progress(ctrl_info))
8465                 pqi_ctrl_unblock_scan(ctrl_info);
8466
8467         pqi_scan_scsi_devices(ctrl_info);
8468
8469         return 0;
8470 }
8471
8472 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev, u16 timeout)
8473 {
8474         int rc;
8475
8476         rc = pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
8477                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
8478
8479         return pcibios_err_to_errno(rc);
8480 }
8481
8482 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
8483 {
8484         int rc;
8485         u64 mask;
8486
8487         rc = pci_enable_device(ctrl_info->pci_dev);
8488         if (rc) {
8489                 dev_err(&ctrl_info->pci_dev->dev,
8490                         "failed to enable PCI device\n");
8491                 return rc;
8492         }
8493
8494         if (sizeof(dma_addr_t) > 4)
8495                 mask = DMA_BIT_MASK(64);
8496         else
8497                 mask = DMA_BIT_MASK(32);
8498
8499         rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask);
8500         if (rc) {
8501                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
8502                 goto disable_device;
8503         }
8504
8505         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
8506         if (rc) {
8507                 dev_err(&ctrl_info->pci_dev->dev,
8508                         "failed to obtain PCI resources\n");
8509                 goto disable_device;
8510         }
8511
8512         ctrl_info->iomem_base = ioremap(pci_resource_start(
8513                 ctrl_info->pci_dev, 0),
8514                 pci_resource_len(ctrl_info->pci_dev, 0));
8515         if (!ctrl_info->iomem_base) {
8516                 dev_err(&ctrl_info->pci_dev->dev,
8517                         "failed to map memory for controller registers\n");
8518                 rc = -ENOMEM;
8519                 goto release_regions;
8520         }
8521
8522 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
8523
8524         /* Increase the PCIe completion timeout. */
8525         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
8526                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
8527         if (rc) {
8528                 dev_err(&ctrl_info->pci_dev->dev,
8529                         "failed to set PCIe completion timeout\n");
8530                 goto release_regions;
8531         }
8532
8533         /* Enable bus mastering. */
8534         pci_set_master(ctrl_info->pci_dev);
8535
8536         ctrl_info->registers = ctrl_info->iomem_base;
8537         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
8538
8539         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
8540
8541         return 0;
8542
8543 release_regions:
8544         pci_release_regions(ctrl_info->pci_dev);
8545 disable_device:
8546         pci_disable_device(ctrl_info->pci_dev);
8547
8548         return rc;
8549 }
8550
8551 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
8552 {
8553         iounmap(ctrl_info->iomem_base);
8554         pci_release_regions(ctrl_info->pci_dev);
8555         if (pci_is_enabled(ctrl_info->pci_dev))
8556                 pci_disable_device(ctrl_info->pci_dev);
8557         pci_set_drvdata(ctrl_info->pci_dev, NULL);
8558 }
8559
8560 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
8561 {
8562         struct pqi_ctrl_info *ctrl_info;
8563
8564         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
8565                         GFP_KERNEL, numa_node);
8566         if (!ctrl_info)
8567                 return NULL;
8568
8569         mutex_init(&ctrl_info->scan_mutex);
8570         mutex_init(&ctrl_info->lun_reset_mutex);
8571         mutex_init(&ctrl_info->ofa_mutex);
8572
8573         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
8574         spin_lock_init(&ctrl_info->scsi_device_list_lock);
8575
8576         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
8577         atomic_set(&ctrl_info->num_interrupts, 0);
8578
8579         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
8580         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
8581
8582         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
8583         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
8584
8585         INIT_WORK(&ctrl_info->ofa_memory_alloc_work, pqi_ofa_memory_alloc_worker);
8586         INIT_WORK(&ctrl_info->ofa_quiesce_work, pqi_ofa_quiesce_worker);
8587
8588         sema_init(&ctrl_info->sync_request_sem,
8589                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
8590         init_waitqueue_head(&ctrl_info->block_requests_wait);
8591
8592         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
8593         ctrl_info->irq_mode = IRQ_MODE_NONE;
8594         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
8595
8596         ctrl_info->ciss_report_log_flags = CISS_REPORT_LOG_FLAG_UNIQUE_LUN_ID;
8597         ctrl_info->max_transfer_encrypted_sas_sata =
8598                 PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_SAS_SATA;
8599         ctrl_info->max_transfer_encrypted_nvme =
8600                 PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_NVME;
8601         ctrl_info->max_write_raid_5_6 = PQI_DEFAULT_MAX_WRITE_RAID_5_6;
8602         ctrl_info->max_write_raid_1_10_2drive = ~0;
8603         ctrl_info->max_write_raid_1_10_3drive = ~0;
8604         ctrl_info->disable_managed_interrupts = pqi_disable_managed_interrupts;
8605
8606         return ctrl_info;
8607 }
8608
8609 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
8610 {
8611         kfree(ctrl_info);
8612 }
8613
8614 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
8615 {
8616         pqi_free_irqs(ctrl_info);
8617         pqi_disable_msix_interrupts(ctrl_info);
8618 }
8619
8620 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
8621 {
8622         pqi_free_interrupts(ctrl_info);
8623         if (ctrl_info->queue_memory_base)
8624                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8625                         ctrl_info->queue_memory_length,
8626                         ctrl_info->queue_memory_base,
8627                         ctrl_info->queue_memory_base_dma_handle);
8628         if (ctrl_info->admin_queue_memory_base)
8629                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8630                         ctrl_info->admin_queue_memory_length,
8631                         ctrl_info->admin_queue_memory_base,
8632                         ctrl_info->admin_queue_memory_base_dma_handle);
8633         pqi_free_all_io_requests(ctrl_info);
8634         if (ctrl_info->error_buffer)
8635                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8636                         ctrl_info->error_buffer_length,
8637                         ctrl_info->error_buffer,
8638                         ctrl_info->error_buffer_dma_handle);
8639         if (ctrl_info->iomem_base)
8640                 pqi_cleanup_pci_init(ctrl_info);
8641         pqi_free_ctrl_info(ctrl_info);
8642 }
8643
8644 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
8645 {
8646         ctrl_info->controller_online = false;
8647         pqi_stop_heartbeat_timer(ctrl_info);
8648         pqi_ctrl_block_requests(ctrl_info);
8649         pqi_cancel_rescan_worker(ctrl_info);
8650         pqi_cancel_update_time_worker(ctrl_info);
8651         if (ctrl_info->ctrl_removal_state == PQI_CTRL_SURPRISE_REMOVAL) {
8652                 pqi_fail_all_outstanding_requests(ctrl_info);
8653                 ctrl_info->pqi_mode_enabled = false;
8654         }
8655         pqi_unregister_scsi(ctrl_info);
8656         if (ctrl_info->pqi_mode_enabled)
8657                 pqi_revert_to_sis_mode(ctrl_info);
8658         pqi_free_ctrl_resources(ctrl_info);
8659 }
8660
8661 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
8662 {
8663         pqi_ctrl_block_scan(ctrl_info);
8664         pqi_scsi_block_requests(ctrl_info);
8665         pqi_ctrl_block_device_reset(ctrl_info);
8666         pqi_ctrl_block_requests(ctrl_info);
8667         pqi_ctrl_wait_until_quiesced(ctrl_info);
8668         pqi_stop_heartbeat_timer(ctrl_info);
8669 }
8670
8671 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
8672 {
8673         pqi_start_heartbeat_timer(ctrl_info);
8674         pqi_ctrl_unblock_requests(ctrl_info);
8675         pqi_ctrl_unblock_device_reset(ctrl_info);
8676         pqi_scsi_unblock_requests(ctrl_info);
8677         pqi_ctrl_unblock_scan(ctrl_info);
8678 }
8679
8680 static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info, u32 total_size, u32 chunk_size)
8681 {
8682         int i;
8683         u32 sg_count;
8684         struct device *dev;
8685         struct pqi_ofa_memory *ofap;
8686         struct pqi_sg_descriptor *mem_descriptor;
8687         dma_addr_t dma_handle;
8688
8689         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8690
8691         sg_count = DIV_ROUND_UP(total_size, chunk_size);
8692         if (sg_count == 0 || sg_count > PQI_OFA_MAX_SG_DESCRIPTORS)
8693                 goto out;
8694
8695         ctrl_info->pqi_ofa_chunk_virt_addr = kmalloc_array(sg_count, sizeof(void *), GFP_KERNEL);
8696         if (!ctrl_info->pqi_ofa_chunk_virt_addr)
8697                 goto out;
8698
8699         dev = &ctrl_info->pci_dev->dev;
8700
8701         for (i = 0; i < sg_count; i++) {
8702                 ctrl_info->pqi_ofa_chunk_virt_addr[i] =
8703                         dma_alloc_coherent(dev, chunk_size, &dma_handle, GFP_KERNEL);
8704                 if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
8705                         goto out_free_chunks;
8706                 mem_descriptor = &ofap->sg_descriptor[i];
8707                 put_unaligned_le64((u64)dma_handle, &mem_descriptor->address);
8708                 put_unaligned_le32(chunk_size, &mem_descriptor->length);
8709         }
8710
8711         put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
8712         put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
8713         put_unaligned_le32(sg_count * chunk_size, &ofap->bytes_allocated);
8714
8715         return 0;
8716
8717 out_free_chunks:
8718         while (--i >= 0) {
8719                 mem_descriptor = &ofap->sg_descriptor[i];
8720                 dma_free_coherent(dev, chunk_size,
8721                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
8722                         get_unaligned_le64(&mem_descriptor->address));
8723         }
8724         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8725
8726 out:
8727         return -ENOMEM;
8728 }
8729
8730 static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
8731 {
8732         u32 total_size;
8733         u32 chunk_size;
8734         u32 min_chunk_size;
8735
8736         if (ctrl_info->ofa_bytes_requested == 0)
8737                 return 0;
8738
8739         total_size = PAGE_ALIGN(ctrl_info->ofa_bytes_requested);
8740         min_chunk_size = DIV_ROUND_UP(total_size, PQI_OFA_MAX_SG_DESCRIPTORS);
8741         min_chunk_size = PAGE_ALIGN(min_chunk_size);
8742
8743         for (chunk_size = total_size; chunk_size >= min_chunk_size;) {
8744                 if (pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_size) == 0)
8745                         return 0;
8746                 chunk_size /= 2;
8747                 chunk_size = PAGE_ALIGN(chunk_size);
8748         }
8749
8750         return -ENOMEM;
8751 }
8752
8753 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info)
8754 {
8755         struct device *dev;
8756         struct pqi_ofa_memory *ofap;
8757
8758         dev = &ctrl_info->pci_dev->dev;
8759
8760         ofap = dma_alloc_coherent(dev, sizeof(*ofap),
8761                 &ctrl_info->pqi_ofa_mem_dma_handle, GFP_KERNEL);
8762         if (!ofap)
8763                 return;
8764
8765         ctrl_info->pqi_ofa_mem_virt_addr = ofap;
8766
8767         if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
8768                 dev_err(dev,
8769                         "failed to allocate host buffer for Online Firmware Activation\n");
8770                 dma_free_coherent(dev, sizeof(*ofap), ofap, ctrl_info->pqi_ofa_mem_dma_handle);
8771                 ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8772                 return;
8773         }
8774
8775         put_unaligned_le16(PQI_OFA_VERSION, &ofap->version);
8776         memcpy(&ofap->signature, PQI_OFA_SIGNATURE, sizeof(ofap->signature));
8777 }
8778
8779 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
8780 {
8781         unsigned int i;
8782         struct device *dev;
8783         struct pqi_ofa_memory *ofap;
8784         struct pqi_sg_descriptor *mem_descriptor;
8785         unsigned int num_memory_descriptors;
8786
8787         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8788         if (!ofap)
8789                 return;
8790
8791         dev = &ctrl_info->pci_dev->dev;
8792
8793         if (get_unaligned_le32(&ofap->bytes_allocated) == 0)
8794                 goto out;
8795
8796         mem_descriptor = ofap->sg_descriptor;
8797         num_memory_descriptors =
8798                 get_unaligned_le16(&ofap->num_memory_descriptors);
8799
8800         for (i = 0; i < num_memory_descriptors; i++) {
8801                 dma_free_coherent(dev,
8802                         get_unaligned_le32(&mem_descriptor[i].length),
8803                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
8804                         get_unaligned_le64(&mem_descriptor[i].address));
8805         }
8806         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8807
8808 out:
8809         dma_free_coherent(dev, sizeof(*ofap), ofap,
8810                 ctrl_info->pqi_ofa_mem_dma_handle);
8811         ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8812 }
8813
8814 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
8815 {
8816         u32 buffer_length;
8817         struct pqi_vendor_general_request request;
8818         struct pqi_ofa_memory *ofap;
8819
8820         memset(&request, 0, sizeof(request));
8821
8822         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
8823         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
8824                 &request.header.iu_length);
8825         put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
8826                 &request.function_code);
8827
8828         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8829
8830         if (ofap) {
8831                 buffer_length = offsetof(struct pqi_ofa_memory, sg_descriptor) +
8832                         get_unaligned_le16(&ofap->num_memory_descriptors) *
8833                         sizeof(struct pqi_sg_descriptor);
8834
8835                 put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
8836                         &request.data.ofa_memory_allocation.buffer_address);
8837                 put_unaligned_le32(buffer_length,
8838                         &request.data.ofa_memory_allocation.buffer_length);
8839         }
8840
8841         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
8842 }
8843
8844 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs)
8845 {
8846         ssleep(delay_secs);
8847
8848         return pqi_ctrl_init_resume(ctrl_info);
8849 }
8850
8851 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
8852         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
8853         .status = SAM_STAT_CHECK_CONDITION,
8854 };
8855
8856 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
8857 {
8858         unsigned int i;
8859         struct pqi_io_request *io_request;
8860         struct scsi_cmnd *scmd;
8861         struct scsi_device *sdev;
8862
8863         for (i = 0; i < ctrl_info->max_io_slots; i++) {
8864                 io_request = &ctrl_info->io_request_pool[i];
8865                 if (atomic_read(&io_request->refcount) == 0)
8866                         continue;
8867
8868                 scmd = io_request->scmd;
8869                 if (scmd) {
8870                         sdev = scmd->device;
8871                         if (!sdev || !scsi_device_online(sdev)) {
8872                                 pqi_free_io_request(io_request);
8873                                 continue;
8874                         } else {
8875                                 set_host_byte(scmd, DID_NO_CONNECT);
8876                         }
8877                 } else {
8878                         io_request->status = -ENXIO;
8879                         io_request->error_info =
8880                                 &pqi_ctrl_offline_raid_error_info;
8881                 }
8882
8883                 io_request->io_complete_callback(io_request,
8884                         io_request->context);
8885         }
8886 }
8887
8888 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
8889 {
8890         pqi_perform_lockup_action();
8891         pqi_stop_heartbeat_timer(ctrl_info);
8892         pqi_free_interrupts(ctrl_info);
8893         pqi_cancel_rescan_worker(ctrl_info);
8894         pqi_cancel_update_time_worker(ctrl_info);
8895         pqi_ctrl_wait_until_quiesced(ctrl_info);
8896         pqi_fail_all_outstanding_requests(ctrl_info);
8897         pqi_ctrl_unblock_requests(ctrl_info);
8898 }
8899
8900 static void pqi_ctrl_offline_worker(struct work_struct *work)
8901 {
8902         struct pqi_ctrl_info *ctrl_info;
8903
8904         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
8905         pqi_take_ctrl_offline_deferred(ctrl_info);
8906 }
8907
8908 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
8909         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
8910 {
8911         if (!ctrl_info->controller_online)
8912                 return;
8913
8914         ctrl_info->controller_online = false;
8915         ctrl_info->pqi_mode_enabled = false;
8916         pqi_ctrl_block_requests(ctrl_info);
8917         if (!pqi_disable_ctrl_shutdown)
8918                 sis_shutdown_ctrl(ctrl_info, ctrl_shutdown_reason);
8919         pci_disable_device(ctrl_info->pci_dev);
8920         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
8921         schedule_work(&ctrl_info->ctrl_offline_work);
8922 }
8923
8924 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
8925         const struct pci_device_id *id)
8926 {
8927         char *ctrl_description;
8928
8929         if (id->driver_data)
8930                 ctrl_description = (char *)id->driver_data;
8931         else
8932                 ctrl_description = "Microchip Smart Family Controller";
8933
8934         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
8935 }
8936
8937 static int pqi_pci_probe(struct pci_dev *pci_dev,
8938         const struct pci_device_id *id)
8939 {
8940         int rc;
8941         int node;
8942         struct pqi_ctrl_info *ctrl_info;
8943
8944         pqi_print_ctrl_info(pci_dev, id);
8945
8946         if (pqi_disable_device_id_wildcards &&
8947                 id->subvendor == PCI_ANY_ID &&
8948                 id->subdevice == PCI_ANY_ID) {
8949                 dev_warn(&pci_dev->dev,
8950                         "controller not probed because device ID wildcards are disabled\n");
8951                 return -ENODEV;
8952         }
8953
8954         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
8955                 dev_warn(&pci_dev->dev,
8956                         "controller device ID matched using wildcards\n");
8957
8958         node = dev_to_node(&pci_dev->dev);
8959         if (node == NUMA_NO_NODE) {
8960                 node = cpu_to_node(0);
8961                 if (node == NUMA_NO_NODE)
8962                         node = 0;
8963                 set_dev_node(&pci_dev->dev, node);
8964         }
8965
8966         ctrl_info = pqi_alloc_ctrl_info(node);
8967         if (!ctrl_info) {
8968                 dev_err(&pci_dev->dev,
8969                         "failed to allocate controller info block\n");
8970                 return -ENOMEM;
8971         }
8972         ctrl_info->numa_node = node;
8973
8974         ctrl_info->pci_dev = pci_dev;
8975
8976         rc = pqi_pci_init(ctrl_info);
8977         if (rc)
8978                 goto error;
8979
8980         rc = pqi_ctrl_init(ctrl_info);
8981         if (rc)
8982                 goto error;
8983
8984         return 0;
8985
8986 error:
8987         pqi_remove_ctrl(ctrl_info);
8988
8989         return rc;
8990 }
8991
8992 static void pqi_pci_remove(struct pci_dev *pci_dev)
8993 {
8994         struct pqi_ctrl_info *ctrl_info;
8995         u16 vendor_id;
8996         int rc;
8997
8998         ctrl_info = pci_get_drvdata(pci_dev);
8999         if (!ctrl_info)
9000                 return;
9001
9002         pci_read_config_word(ctrl_info->pci_dev, PCI_SUBSYSTEM_VENDOR_ID, &vendor_id);
9003         if (vendor_id == 0xffff)
9004                 ctrl_info->ctrl_removal_state = PQI_CTRL_SURPRISE_REMOVAL;
9005         else
9006                 ctrl_info->ctrl_removal_state = PQI_CTRL_GRACEFUL_REMOVAL;
9007
9008         if (ctrl_info->ctrl_removal_state == PQI_CTRL_GRACEFUL_REMOVAL) {
9009                 rc = pqi_flush_cache(ctrl_info, RESTART);
9010                 if (rc)
9011                         dev_err(&pci_dev->dev,
9012                                 "unable to flush controller cache during remove\n");
9013         }
9014
9015         pqi_remove_ctrl(ctrl_info);
9016 }
9017
9018 static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info)
9019 {
9020         unsigned int i;
9021         struct pqi_io_request *io_request;
9022         struct scsi_cmnd *scmd;
9023
9024         for (i = 0; i < ctrl_info->max_io_slots; i++) {
9025                 io_request = &ctrl_info->io_request_pool[i];
9026                 if (atomic_read(&io_request->refcount) == 0)
9027                         continue;
9028                 scmd = io_request->scmd;
9029                 WARN_ON(scmd != NULL); /* IO command from SML */
9030                 WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/
9031         }
9032 }
9033
9034 static void pqi_shutdown(struct pci_dev *pci_dev)
9035 {
9036         int rc;
9037         struct pqi_ctrl_info *ctrl_info;
9038         enum bmic_flush_cache_shutdown_event shutdown_event;
9039
9040         ctrl_info = pci_get_drvdata(pci_dev);
9041         if (!ctrl_info) {
9042                 dev_err(&pci_dev->dev,
9043                         "cache could not be flushed\n");
9044                 return;
9045         }
9046
9047         pqi_wait_until_ofa_finished(ctrl_info);
9048
9049         pqi_scsi_block_requests(ctrl_info);
9050         pqi_ctrl_block_device_reset(ctrl_info);
9051         pqi_ctrl_block_requests(ctrl_info);
9052         pqi_ctrl_wait_until_quiesced(ctrl_info);
9053
9054         if (system_state == SYSTEM_RESTART)
9055                 shutdown_event = RESTART;
9056         else
9057                 shutdown_event = SHUTDOWN;
9058
9059         /*
9060          * Write all data in the controller's battery-backed cache to
9061          * storage.
9062          */
9063         rc = pqi_flush_cache(ctrl_info, shutdown_event);
9064         if (rc)
9065                 dev_err(&pci_dev->dev,
9066                         "unable to flush controller cache\n");
9067
9068         pqi_crash_if_pending_command(ctrl_info);
9069         pqi_reset(ctrl_info);
9070 }
9071
9072 static void pqi_process_lockup_action_param(void)
9073 {
9074         unsigned int i;
9075
9076         if (!pqi_lockup_action_param)
9077                 return;
9078
9079         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
9080                 if (strcmp(pqi_lockup_action_param,
9081                         pqi_lockup_actions[i].name) == 0) {
9082                         pqi_lockup_action = pqi_lockup_actions[i].action;
9083                         return;
9084                 }
9085         }
9086
9087         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
9088                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
9089 }
9090
9091 #define PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS           30
9092 #define PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS           (30 * 60)
9093
9094 static void pqi_process_ctrl_ready_timeout_param(void)
9095 {
9096         if (pqi_ctrl_ready_timeout_secs == 0)
9097                 return;
9098
9099         if (pqi_ctrl_ready_timeout_secs < PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS) {
9100                 pr_warn("%s: ctrl_ready_timeout parm of %u second(s) is less than minimum timeout of %d seconds - setting timeout to %d seconds\n",
9101                         DRIVER_NAME_SHORT, pqi_ctrl_ready_timeout_secs, PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS, PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS);
9102                 pqi_ctrl_ready_timeout_secs = PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS;
9103         } else if (pqi_ctrl_ready_timeout_secs > PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS) {
9104                 pr_warn("%s: ctrl_ready_timeout parm of %u seconds is greater than maximum timeout of %d seconds - setting timeout to %d seconds\n",
9105                         DRIVER_NAME_SHORT, pqi_ctrl_ready_timeout_secs, PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS, PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS);
9106                 pqi_ctrl_ready_timeout_secs = PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS;
9107         }
9108
9109         sis_ctrl_ready_timeout_secs = pqi_ctrl_ready_timeout_secs;
9110 }
9111
9112 static void pqi_process_module_params(void)
9113 {
9114         pqi_process_lockup_action_param();
9115         pqi_process_ctrl_ready_timeout_param();
9116 }
9117
9118 #if defined(CONFIG_PM)
9119
9120 static inline enum bmic_flush_cache_shutdown_event pqi_get_flush_cache_shutdown_event(struct pci_dev *pci_dev)
9121 {
9122         if (pci_dev->subsystem_vendor == PCI_VENDOR_ID_ADAPTEC2 && pci_dev->subsystem_device == 0x1304)
9123                 return RESTART;
9124
9125         return SUSPEND;
9126 }
9127
9128 static int pqi_suspend_or_freeze(struct device *dev, bool suspend)
9129 {
9130         struct pci_dev *pci_dev;
9131         struct pqi_ctrl_info *ctrl_info;
9132
9133         pci_dev = to_pci_dev(dev);
9134         ctrl_info = pci_get_drvdata(pci_dev);
9135
9136         pqi_wait_until_ofa_finished(ctrl_info);
9137
9138         pqi_ctrl_block_scan(ctrl_info);
9139         pqi_scsi_block_requests(ctrl_info);
9140         pqi_ctrl_block_device_reset(ctrl_info);
9141         pqi_ctrl_block_requests(ctrl_info);
9142         pqi_ctrl_wait_until_quiesced(ctrl_info);
9143
9144         if (suspend) {
9145                 enum bmic_flush_cache_shutdown_event shutdown_event;
9146
9147                 shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
9148                 pqi_flush_cache(ctrl_info, shutdown_event);
9149         }
9150
9151         pqi_stop_heartbeat_timer(ctrl_info);
9152         pqi_crash_if_pending_command(ctrl_info);
9153         pqi_free_irqs(ctrl_info);
9154
9155         ctrl_info->controller_online = false;
9156         ctrl_info->pqi_mode_enabled = false;
9157
9158         return 0;
9159 }
9160
9161 static __maybe_unused int pqi_suspend(struct device *dev)
9162 {
9163         return pqi_suspend_or_freeze(dev, true);
9164 }
9165
9166 static int pqi_resume_or_restore(struct device *dev)
9167 {
9168         int rc;
9169         struct pci_dev *pci_dev;
9170         struct pqi_ctrl_info *ctrl_info;
9171
9172         pci_dev = to_pci_dev(dev);
9173         ctrl_info = pci_get_drvdata(pci_dev);
9174
9175         rc = pqi_request_irqs(ctrl_info);
9176         if (rc)
9177                 return rc;
9178
9179         pqi_ctrl_unblock_device_reset(ctrl_info);
9180         pqi_ctrl_unblock_requests(ctrl_info);
9181         pqi_scsi_unblock_requests(ctrl_info);
9182         pqi_ctrl_unblock_scan(ctrl_info);
9183
9184         ssleep(PQI_POST_RESET_DELAY_SECS);
9185
9186         return pqi_ctrl_init_resume(ctrl_info);
9187 }
9188
9189 static int pqi_freeze(struct device *dev)
9190 {
9191         return pqi_suspend_or_freeze(dev, false);
9192 }
9193
9194 static int pqi_thaw(struct device *dev)
9195 {
9196         int rc;
9197         struct pci_dev *pci_dev;
9198         struct pqi_ctrl_info *ctrl_info;
9199
9200         pci_dev = to_pci_dev(dev);
9201         ctrl_info = pci_get_drvdata(pci_dev);
9202
9203         rc = pqi_request_irqs(ctrl_info);
9204         if (rc)
9205                 return rc;
9206
9207         ctrl_info->controller_online = true;
9208         ctrl_info->pqi_mode_enabled = true;
9209
9210         pqi_ctrl_unblock_device_reset(ctrl_info);
9211         pqi_ctrl_unblock_requests(ctrl_info);
9212         pqi_scsi_unblock_requests(ctrl_info);
9213         pqi_ctrl_unblock_scan(ctrl_info);
9214
9215         return 0;
9216 }
9217
9218 static int pqi_poweroff(struct device *dev)
9219 {
9220         struct pci_dev *pci_dev;
9221         struct pqi_ctrl_info *ctrl_info;
9222         enum bmic_flush_cache_shutdown_event shutdown_event;
9223
9224         pci_dev = to_pci_dev(dev);
9225         ctrl_info = pci_get_drvdata(pci_dev);
9226
9227         shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
9228         pqi_flush_cache(ctrl_info, shutdown_event);
9229
9230         return 0;
9231 }
9232
9233 static const struct dev_pm_ops pqi_pm_ops = {
9234         .suspend = pqi_suspend,
9235         .resume = pqi_resume_or_restore,
9236         .freeze = pqi_freeze,
9237         .thaw = pqi_thaw,
9238         .poweroff = pqi_poweroff,
9239         .restore = pqi_resume_or_restore,
9240 };
9241
9242 #endif /* CONFIG_PM */
9243
9244 /* Define the PCI IDs for the controllers that we support. */
9245 static const struct pci_device_id pqi_pci_id_table[] = {
9246         {
9247                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9248                                0x105b, 0x1211)
9249         },
9250         {
9251                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9252                                0x105b, 0x1321)
9253         },
9254         {
9255                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9256                                0x152d, 0x8a22)
9257         },
9258         {
9259                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9260                                0x152d, 0x8a23)
9261         },
9262         {
9263                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9264                                0x152d, 0x8a24)
9265         },
9266         {
9267                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9268                                0x152d, 0x8a36)
9269         },
9270         {
9271                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9272                                0x152d, 0x8a37)
9273         },
9274         {
9275                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9276                                0x193d, 0x1104)
9277         },
9278         {
9279                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9280                                0x193d, 0x1105)
9281         },
9282         {
9283                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9284                                0x193d, 0x1106)
9285         },
9286         {
9287                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9288                                0x193d, 0x1107)
9289         },
9290         {
9291                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9292                                0x193d, 0x1108)
9293         },
9294         {
9295                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9296                                0x193d, 0x1109)
9297         },
9298         {
9299                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9300                                0x193d, 0x110b)
9301         },
9302         {
9303                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9304                                0x193d, 0x8460)
9305         },
9306         {
9307                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9308                                0x193d, 0x8461)
9309         },
9310         {
9311                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9312                                0x193d, 0xc460)
9313         },
9314         {
9315                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9316                                0x193d, 0xc461)
9317         },
9318         {
9319                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9320                                0x193d, 0xf460)
9321         },
9322         {
9323                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9324                                0x193d, 0xf461)
9325         },
9326         {
9327                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9328                                0x1bd4, 0x0045)
9329         },
9330         {
9331                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9332                                0x1bd4, 0x0046)
9333         },
9334         {
9335                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9336                                0x1bd4, 0x0047)
9337         },
9338         {
9339                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9340                                0x1bd4, 0x0048)
9341         },
9342         {
9343                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9344                                0x1bd4, 0x004a)
9345         },
9346         {
9347                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9348                                0x1bd4, 0x004b)
9349         },
9350         {
9351                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9352                                0x1bd4, 0x004c)
9353         },
9354         {
9355                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9356                                0x1bd4, 0x004f)
9357         },
9358         {
9359                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9360                                0x1bd4, 0x0051)
9361         },
9362         {
9363                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9364                                0x1bd4, 0x0052)
9365         },
9366         {
9367                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9368                                0x1bd4, 0x0053)
9369         },
9370         {
9371                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9372                                0x1bd4, 0x0054)
9373         },
9374         {
9375                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9376                                0x1bd4, 0x006b)
9377         },
9378         {
9379                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9380                                0x1bd4, 0x006c)
9381         },
9382         {
9383                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9384                                0x1bd4, 0x006d)
9385         },
9386         {
9387                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9388                                0x1bd4, 0x006f)
9389         },
9390         {
9391                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9392                                0x1bd4, 0x0070)
9393         },
9394         {
9395                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9396                                0x1bd4, 0x0071)
9397         },
9398         {
9399                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9400                                0x1bd4, 0x0072)
9401         },
9402         {
9403                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9404                                0x1bd4, 0x0086)
9405         },
9406         {
9407                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9408                                0x1bd4, 0x0087)
9409         },
9410         {
9411                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9412                                0x1bd4, 0x0088)
9413         },
9414         {
9415                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9416                                0x1bd4, 0x0089)
9417         },
9418         {
9419                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9420                                0x19e5, 0xd227)
9421         },
9422         {
9423                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9424                                0x19e5, 0xd228)
9425         },
9426         {
9427                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9428                                0x19e5, 0xd229)
9429         },
9430         {
9431                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9432                                0x19e5, 0xd22a)
9433         },
9434         {
9435                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9436                                0x19e5, 0xd22b)
9437         },
9438         {
9439                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9440                                0x19e5, 0xd22c)
9441         },
9442         {
9443                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9444                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
9445         },
9446         {
9447                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9448                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
9449         },
9450         {
9451                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9452                                PCI_VENDOR_ID_ADAPTEC2, 0x0659)
9453         },
9454         {
9455                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9456                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
9457         },
9458         {
9459                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9460                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
9461         },
9462         {
9463                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9464                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
9465         },
9466         {
9467                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9468                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
9469         },
9470         {
9471                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9472                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
9473         },
9474         {
9475                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9476                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
9477         },
9478         {
9479                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9480                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
9481         },
9482         {
9483                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9484                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
9485         },
9486         {
9487                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9488                                PCI_VENDOR_ID_ADAPTEC2, 0x0808)
9489         },
9490         {
9491                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9492                                PCI_VENDOR_ID_ADAPTEC2, 0x0809)
9493         },
9494         {
9495                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9496                                PCI_VENDOR_ID_ADAPTEC2, 0x080a)
9497         },
9498         {
9499                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9500                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
9501         },
9502         {
9503                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9504                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
9505         },
9506         {
9507                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9508                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
9509         },
9510         {
9511                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9512                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
9513         },
9514         {
9515                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9516                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
9517         },
9518         {
9519                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9520                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
9521         },
9522         {
9523                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9524                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
9525         },
9526         {
9527                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9528                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
9529         },
9530         {
9531                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9532                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
9533         },
9534         {
9535                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9536                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
9537         },
9538         {
9539                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9540                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
9541         },
9542         {
9543                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9544                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
9545         },
9546         {
9547                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9548                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
9549         },
9550         {
9551                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9552                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
9553         },
9554         {
9555                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9556                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
9557         },
9558         {
9559                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9560                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
9561         },
9562         {
9563                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9564                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
9565         },
9566         {
9567                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9568                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
9569         },
9570         {
9571                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9572                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
9573         },
9574         {
9575                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9576                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
9577         },
9578         {
9579                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9580                                PCI_VENDOR_ID_ADAPTEC2, 0x1304)
9581         },
9582         {
9583                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9584                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
9585         },
9586         {
9587                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9588                                PCI_VENDOR_ID_ADAPTEC2, 0x1400)
9589         },
9590         {
9591                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9592                                PCI_VENDOR_ID_ADAPTEC2, 0x1402)
9593         },
9594         {
9595                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9596                                PCI_VENDOR_ID_ADAPTEC2, 0x1410)
9597         },
9598         {
9599                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9600                                PCI_VENDOR_ID_ADAPTEC2, 0x1411)
9601         },
9602         {
9603                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9604                                PCI_VENDOR_ID_ADAPTEC2, 0x1412)
9605         },
9606         {
9607                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9608                                PCI_VENDOR_ID_ADAPTEC2, 0x1420)
9609         },
9610         {
9611                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9612                                PCI_VENDOR_ID_ADAPTEC2, 0x1430)
9613         },
9614         {
9615                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9616                                PCI_VENDOR_ID_ADAPTEC2, 0x1440)
9617         },
9618         {
9619                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9620                                PCI_VENDOR_ID_ADAPTEC2, 0x1441)
9621         },
9622         {
9623                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9624                                PCI_VENDOR_ID_ADAPTEC2, 0x1450)
9625         },
9626         {
9627                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9628                                PCI_VENDOR_ID_ADAPTEC2, 0x1452)
9629         },
9630         {
9631                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9632                                PCI_VENDOR_ID_ADAPTEC2, 0x1460)
9633         },
9634         {
9635                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9636                                PCI_VENDOR_ID_ADAPTEC2, 0x1461)
9637         },
9638         {
9639                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9640                                PCI_VENDOR_ID_ADAPTEC2, 0x1462)
9641         },
9642         {
9643                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9644                                PCI_VENDOR_ID_ADAPTEC2, 0x1463)
9645         },
9646         {
9647                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9648                                PCI_VENDOR_ID_ADAPTEC2, 0x1470)
9649         },
9650         {
9651                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9652                                PCI_VENDOR_ID_ADAPTEC2, 0x1471)
9653         },
9654         {
9655                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9656                                PCI_VENDOR_ID_ADAPTEC2, 0x1472)
9657         },
9658         {
9659                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9660                                PCI_VENDOR_ID_ADAPTEC2, 0x1473)
9661         },
9662         {
9663                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9664                                PCI_VENDOR_ID_ADAPTEC2, 0x1474)
9665         },
9666         {
9667                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9668                                PCI_VENDOR_ID_ADAPTEC2, 0x1475)
9669         },
9670         {
9671                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9672                                PCI_VENDOR_ID_ADAPTEC2, 0x1480)
9673         },
9674         {
9675                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9676                                PCI_VENDOR_ID_ADAPTEC2, 0x1490)
9677         },
9678         {
9679                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9680                                PCI_VENDOR_ID_ADAPTEC2, 0x1491)
9681         },
9682         {
9683                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9684                                PCI_VENDOR_ID_ADAPTEC2, 0x14a0)
9685         },
9686         {
9687                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9688                                PCI_VENDOR_ID_ADAPTEC2, 0x14a1)
9689         },
9690         {
9691                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9692                                PCI_VENDOR_ID_ADAPTEC2, 0x14a2)
9693         },
9694         {
9695                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9696                                PCI_VENDOR_ID_ADAPTEC2, 0x14a4)
9697         },
9698         {
9699                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9700                                PCI_VENDOR_ID_ADAPTEC2, 0x14a5)
9701         },
9702         {
9703                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9704                                PCI_VENDOR_ID_ADAPTEC2, 0x14a6)
9705         },
9706         {
9707                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9708                                PCI_VENDOR_ID_ADAPTEC2, 0x14b0)
9709         },
9710         {
9711                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9712                                PCI_VENDOR_ID_ADAPTEC2, 0x14b1)
9713         },
9714         {
9715                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9716                                PCI_VENDOR_ID_ADAPTEC2, 0x14c0)
9717         },
9718         {
9719                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9720                                PCI_VENDOR_ID_ADAPTEC2, 0x14c1)
9721         },
9722         {
9723                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9724                                PCI_VENDOR_ID_ADAPTEC2, 0x14c2)
9725         },
9726         {
9727                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9728                                PCI_VENDOR_ID_ADAPTEC2, 0x14c3)
9729         },
9730         {
9731                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9732                                PCI_VENDOR_ID_ADAPTEC2, 0x14c4)
9733         },
9734         {
9735                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9736                                PCI_VENDOR_ID_ADAPTEC2, 0x14d0)
9737         },
9738         {
9739                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9740                                PCI_VENDOR_ID_ADAPTEC2, 0x14e0)
9741         },
9742         {
9743                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9744                                PCI_VENDOR_ID_ADAPTEC2, 0x14f0)
9745         },
9746         {
9747                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9748                                PCI_VENDOR_ID_ADVANTECH, 0x8312)
9749         },
9750         {
9751                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9752                                PCI_VENDOR_ID_DELL, 0x1fe0)
9753         },
9754         {
9755                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9756                                PCI_VENDOR_ID_HP, 0x0600)
9757         },
9758         {
9759                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9760                                PCI_VENDOR_ID_HP, 0x0601)
9761         },
9762         {
9763                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9764                                PCI_VENDOR_ID_HP, 0x0602)
9765         },
9766         {
9767                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9768                                PCI_VENDOR_ID_HP, 0x0603)
9769         },
9770         {
9771                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9772                                PCI_VENDOR_ID_HP, 0x0609)
9773         },
9774         {
9775                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9776                                PCI_VENDOR_ID_HP, 0x0650)
9777         },
9778         {
9779                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9780                                PCI_VENDOR_ID_HP, 0x0651)
9781         },
9782         {
9783                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9784                                PCI_VENDOR_ID_HP, 0x0652)
9785         },
9786         {
9787                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9788                                PCI_VENDOR_ID_HP, 0x0653)
9789         },
9790         {
9791                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9792                                PCI_VENDOR_ID_HP, 0x0654)
9793         },
9794         {
9795                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9796                                PCI_VENDOR_ID_HP, 0x0655)
9797         },
9798         {
9799                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9800                                PCI_VENDOR_ID_HP, 0x0700)
9801         },
9802         {
9803                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9804                                PCI_VENDOR_ID_HP, 0x0701)
9805         },
9806         {
9807                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9808                                PCI_VENDOR_ID_HP, 0x1001)
9809         },
9810         {
9811                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9812                                PCI_VENDOR_ID_HP, 0x1002)
9813         },
9814         {
9815                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9816                                PCI_VENDOR_ID_HP, 0x1100)
9817         },
9818         {
9819                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9820                                PCI_VENDOR_ID_HP, 0x1101)
9821         },
9822         {
9823                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9824                                0x1590, 0x0294)
9825         },
9826         {
9827                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9828                                0x1590, 0x02db)
9829         },
9830         {
9831                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9832                                0x1590, 0x02dc)
9833         },
9834         {
9835                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9836                                0x1590, 0x032e)
9837         },
9838         {
9839                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9840                                0x1590, 0x036f)
9841         },
9842         {
9843                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9844                                0x1590, 0x0381)
9845         },
9846         {
9847                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9848                                0x1590, 0x0382)
9849         },
9850         {
9851                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9852                                0x1590, 0x0383)
9853         },
9854         {
9855                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9856                                0x1d8d, 0x0800)
9857         },
9858         {
9859                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9860                                0x1d8d, 0x0908)
9861         },
9862         {
9863                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9864                                0x1d8d, 0x0806)
9865         },
9866         {
9867                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9868                                0x1d8d, 0x0916)
9869         },
9870         {
9871                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9872                                PCI_VENDOR_ID_GIGABYTE, 0x1000)
9873         },
9874         {
9875                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9876                                0x1dfc, 0x3161)
9877         },
9878         {
9879                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9880                                0x1f0c, 0x3161)
9881         },
9882         {
9883                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9884                                0x1cf2, 0x0804)
9885         },
9886         {
9887                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9888                                0x1cf2, 0x0805)
9889         },
9890         {
9891                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9892                                0x1cf2, 0x0806)
9893         },
9894         {
9895                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9896                                0x1cf2, 0x5445)
9897         },
9898         {
9899                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9900                                0x1cf2, 0x5446)
9901         },
9902         {
9903                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9904                                0x1cf2, 0x5447)
9905         },
9906         {
9907                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9908                                0x1cf2, 0x5449)
9909         },
9910         {
9911                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9912                                0x1cf2, 0x544a)
9913         },
9914         {
9915                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9916                                0x1cf2, 0x544b)
9917         },
9918         {
9919                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9920                                0x1cf2, 0x544d)
9921         },
9922         {
9923                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9924                                0x1cf2, 0x544e)
9925         },
9926         {
9927                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9928                                0x1cf2, 0x544f)
9929         },
9930         {
9931                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9932                                0x1cf2, 0x54da)
9933         },
9934         {
9935                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9936                                0x1cf2, 0x54db)
9937         },
9938         {
9939                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9940                                0x1cf2, 0x54dc)
9941         },
9942         {
9943                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9944                                0x1cf2, 0x0b27)
9945         },
9946         {
9947                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9948                                0x1cf2, 0x0b29)
9949         },
9950         {
9951                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9952                                0x1cf2, 0x0b45)
9953         },
9954         {
9955                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9956                                0x1cc4, 0x0101)
9957         },
9958         {
9959                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9960                                0x1cc4, 0x0201)
9961         },
9962         {
9963                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9964                                PCI_VENDOR_ID_LENOVO, 0x0220)
9965         },
9966         {
9967                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9968                                PCI_VENDOR_ID_LENOVO, 0x0221)
9969         },
9970         {
9971                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9972                                PCI_VENDOR_ID_LENOVO, 0x0520)
9973         },
9974         {
9975                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9976                                PCI_VENDOR_ID_LENOVO, 0x0522)
9977         },
9978         {
9979                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9980                                PCI_VENDOR_ID_LENOVO, 0x0620)
9981         },
9982         {
9983                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9984                                PCI_VENDOR_ID_LENOVO, 0x0621)
9985         },
9986         {
9987                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9988                                PCI_VENDOR_ID_LENOVO, 0x0622)
9989         },
9990         {
9991                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9992                                PCI_VENDOR_ID_LENOVO, 0x0623)
9993         },
9994         {
9995                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9996                                 0x1014, 0x0718)
9997         },
9998         {
9999                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10000                                 0x1e93, 0x1000)
10001         },
10002         {
10003                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10004                                 0x1e93, 0x1001)
10005         },
10006         {
10007                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10008                                 0x1e93, 0x1002)
10009         },
10010         {
10011                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10012                                 0x1e93, 0x1005)
10013         },
10014         {
10015                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10016                                 0x1f51, 0x1001)
10017         },
10018         {
10019                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10020                                 0x1f51, 0x1002)
10021         },
10022         {
10023                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10024                                 0x1f51, 0x1003)
10025         },
10026         {
10027                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10028                                 0x1f51, 0x1004)
10029         },
10030         {
10031                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10032                                 0x1f51, 0x1005)
10033         },
10034         {
10035                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10036                                 0x1f51, 0x1006)
10037         },
10038         {
10039                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10040                                 0x1f51, 0x1007)
10041         },
10042         {
10043                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10044                                 0x1f51, 0x1008)
10045         },
10046         {
10047                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10048                                 0x1f51, 0x1009)
10049         },
10050         {
10051                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10052                                 0x1f51, 0x100a)
10053         },
10054         {
10055                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10056                                PCI_ANY_ID, PCI_ANY_ID)
10057         },
10058         { 0 }
10059 };
10060
10061 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
10062
10063 static struct pci_driver pqi_pci_driver = {
10064         .name = DRIVER_NAME_SHORT,
10065         .id_table = pqi_pci_id_table,
10066         .probe = pqi_pci_probe,
10067         .remove = pqi_pci_remove,
10068         .shutdown = pqi_shutdown,
10069 #if defined(CONFIG_PM)
10070         .driver = {
10071                 .pm = &pqi_pm_ops
10072         },
10073 #endif
10074 };
10075
10076 static int __init pqi_init(void)
10077 {
10078         int rc;
10079
10080         pr_info(DRIVER_NAME "\n");
10081         pqi_verify_structures();
10082         sis_verify_structures();
10083
10084         pqi_sas_transport_template = sas_attach_transport(&pqi_sas_transport_functions);
10085         if (!pqi_sas_transport_template)
10086                 return -ENODEV;
10087
10088         pqi_process_module_params();
10089
10090         rc = pci_register_driver(&pqi_pci_driver);
10091         if (rc)
10092                 sas_release_transport(pqi_sas_transport_template);
10093
10094         return rc;
10095 }
10096
10097 static void __exit pqi_cleanup(void)
10098 {
10099         pci_unregister_driver(&pqi_pci_driver);
10100         sas_release_transport(pqi_sas_transport_template);
10101 }
10102
10103 module_init(pqi_init);
10104 module_exit(pqi_cleanup);
10105
10106 static void pqi_verify_structures(void)
10107 {
10108         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10109                 sis_host_to_ctrl_doorbell) != 0x20);
10110         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10111                 sis_interrupt_mask) != 0x34);
10112         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10113                 sis_ctrl_to_host_doorbell) != 0x9c);
10114         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10115                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
10116         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10117                 sis_driver_scratch) != 0xb0);
10118         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10119                 sis_product_identifier) != 0xb4);
10120         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10121                 sis_firmware_status) != 0xbc);
10122         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10123                 sis_ctrl_shutdown_reason_code) != 0xcc);
10124         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10125                 sis_mailbox) != 0x1000);
10126         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10127                 pqi_registers) != 0x4000);
10128
10129         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10130                 iu_type) != 0x0);
10131         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10132                 iu_length) != 0x2);
10133         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10134                 response_queue_id) != 0x4);
10135         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10136                 driver_flags) != 0x6);
10137         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
10138
10139         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10140                 status) != 0x0);
10141         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10142                 service_response) != 0x1);
10143         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10144                 data_present) != 0x2);
10145         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10146                 reserved) != 0x3);
10147         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10148                 residual_count) != 0x4);
10149         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10150                 data_length) != 0x8);
10151         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10152                 reserved1) != 0xa);
10153         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10154                 data) != 0xc);
10155         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
10156
10157         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10158                 data_in_result) != 0x0);
10159         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10160                 data_out_result) != 0x1);
10161         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10162                 reserved) != 0x2);
10163         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10164                 status) != 0x5);
10165         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10166                 status_qualifier) != 0x6);
10167         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10168                 sense_data_length) != 0x8);
10169         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10170                 response_data_length) != 0xa);
10171         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10172                 data_in_transferred) != 0xc);
10173         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10174                 data_out_transferred) != 0x10);
10175         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10176                 data) != 0x14);
10177         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
10178
10179         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10180                 signature) != 0x0);
10181         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10182                 function_and_status_code) != 0x8);
10183         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10184                 max_admin_iq_elements) != 0x10);
10185         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10186                 max_admin_oq_elements) != 0x11);
10187         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10188                 admin_iq_element_length) != 0x12);
10189         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10190                 admin_oq_element_length) != 0x13);
10191         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10192                 max_reset_timeout) != 0x14);
10193         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10194                 legacy_intx_status) != 0x18);
10195         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10196                 legacy_intx_mask_set) != 0x1c);
10197         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10198                 legacy_intx_mask_clear) != 0x20);
10199         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10200                 device_status) != 0x40);
10201         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10202                 admin_iq_pi_offset) != 0x48);
10203         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10204                 admin_oq_ci_offset) != 0x50);
10205         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10206                 admin_iq_element_array_addr) != 0x58);
10207         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10208                 admin_oq_element_array_addr) != 0x60);
10209         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10210                 admin_iq_ci_addr) != 0x68);
10211         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10212                 admin_oq_pi_addr) != 0x70);
10213         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10214                 admin_iq_num_elements) != 0x78);
10215         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10216                 admin_oq_num_elements) != 0x79);
10217         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10218                 admin_queue_int_msg_num) != 0x7a);
10219         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10220                 device_error) != 0x80);
10221         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10222                 error_details) != 0x88);
10223         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10224                 device_reset) != 0x90);
10225         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10226                 power_action) != 0x94);
10227         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
10228
10229         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10230                 header.iu_type) != 0);
10231         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10232                 header.iu_length) != 2);
10233         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10234                 header.driver_flags) != 6);
10235         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10236                 request_id) != 8);
10237         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10238                 function_code) != 10);
10239         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10240                 data.report_device_capability.buffer_length) != 44);
10241         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10242                 data.report_device_capability.sg_descriptor) != 48);
10243         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10244                 data.create_operational_iq.queue_id) != 12);
10245         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10246                 data.create_operational_iq.element_array_addr) != 16);
10247         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10248                 data.create_operational_iq.ci_addr) != 24);
10249         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10250                 data.create_operational_iq.num_elements) != 32);
10251         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10252                 data.create_operational_iq.element_length) != 34);
10253         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10254                 data.create_operational_iq.queue_protocol) != 36);
10255         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10256                 data.create_operational_oq.queue_id) != 12);
10257         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10258                 data.create_operational_oq.element_array_addr) != 16);
10259         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10260                 data.create_operational_oq.pi_addr) != 24);
10261         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10262                 data.create_operational_oq.num_elements) != 32);
10263         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10264                 data.create_operational_oq.element_length) != 34);
10265         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10266                 data.create_operational_oq.queue_protocol) != 36);
10267         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10268                 data.create_operational_oq.int_msg_num) != 40);
10269         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10270                 data.create_operational_oq.coalescing_count) != 42);
10271         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10272                 data.create_operational_oq.min_coalescing_time) != 44);
10273         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10274                 data.create_operational_oq.max_coalescing_time) != 48);
10275         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10276                 data.delete_operational_queue.queue_id) != 12);
10277         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
10278         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10279                 data.create_operational_iq) != 64 - 11);
10280         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10281                 data.create_operational_oq) != 64 - 11);
10282         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10283                 data.delete_operational_queue) != 64 - 11);
10284
10285         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10286                 header.iu_type) != 0);
10287         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10288                 header.iu_length) != 2);
10289         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10290                 header.driver_flags) != 6);
10291         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10292                 request_id) != 8);
10293         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10294                 function_code) != 10);
10295         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10296                 status) != 11);
10297         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10298                 data.create_operational_iq.status_descriptor) != 12);
10299         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10300                 data.create_operational_iq.iq_pi_offset) != 16);
10301         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10302                 data.create_operational_oq.status_descriptor) != 12);
10303         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10304                 data.create_operational_oq.oq_ci_offset) != 16);
10305         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
10306
10307         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10308                 header.iu_type) != 0);
10309         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10310                 header.iu_length) != 2);
10311         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10312                 header.response_queue_id) != 4);
10313         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10314                 header.driver_flags) != 6);
10315         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10316                 request_id) != 8);
10317         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10318                 nexus_id) != 10);
10319         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10320                 buffer_length) != 12);
10321         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10322                 lun_number) != 16);
10323         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10324                 protocol_specific) != 24);
10325         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10326                 error_index) != 27);
10327         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10328                 cdb) != 32);
10329         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10330                 timeout) != 60);
10331         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10332                 sg_descriptors) != 64);
10333         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
10334                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
10335
10336         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10337                 header.iu_type) != 0);
10338         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10339                 header.iu_length) != 2);
10340         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10341                 header.response_queue_id) != 4);
10342         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10343                 header.driver_flags) != 6);
10344         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10345                 request_id) != 8);
10346         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10347                 nexus_id) != 12);
10348         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10349                 buffer_length) != 16);
10350         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10351                 data_encryption_key_index) != 22);
10352         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10353                 encrypt_tweak_lower) != 24);
10354         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10355                 encrypt_tweak_upper) != 28);
10356         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10357                 cdb) != 32);
10358         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10359                 error_index) != 48);
10360         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10361                 num_sg_descriptors) != 50);
10362         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10363                 cdb_length) != 51);
10364         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10365                 lun_number) != 52);
10366         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10367                 sg_descriptors) != 64);
10368         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
10369                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
10370
10371         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10372                 header.iu_type) != 0);
10373         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10374                 header.iu_length) != 2);
10375         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10376                 request_id) != 8);
10377         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10378                 error_index) != 10);
10379
10380         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10381                 header.iu_type) != 0);
10382         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10383                 header.iu_length) != 2);
10384         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10385                 header.response_queue_id) != 4);
10386         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10387                 request_id) != 8);
10388         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10389                 data.report_event_configuration.buffer_length) != 12);
10390         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10391                 data.report_event_configuration.sg_descriptors) != 16);
10392         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10393                 data.set_event_configuration.global_event_oq_id) != 10);
10394         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10395                 data.set_event_configuration.buffer_length) != 12);
10396         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10397                 data.set_event_configuration.sg_descriptors) != 16);
10398
10399         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
10400                 max_inbound_iu_length) != 6);
10401         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
10402                 max_outbound_iu_length) != 14);
10403         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
10404
10405         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10406                 data_length) != 0);
10407         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10408                 iq_arbitration_priority_support_bitmask) != 8);
10409         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10410                 maximum_aw_a) != 9);
10411         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10412                 maximum_aw_b) != 10);
10413         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10414                 maximum_aw_c) != 11);
10415         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10416                 max_inbound_queues) != 16);
10417         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10418                 max_elements_per_iq) != 18);
10419         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10420                 max_iq_element_length) != 24);
10421         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10422                 min_iq_element_length) != 26);
10423         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10424                 max_outbound_queues) != 30);
10425         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10426                 max_elements_per_oq) != 32);
10427         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10428                 intr_coalescing_time_granularity) != 34);
10429         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10430                 max_oq_element_length) != 36);
10431         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10432                 min_oq_element_length) != 38);
10433         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10434                 iu_layer_descriptors) != 64);
10435         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
10436
10437         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
10438                 event_type) != 0);
10439         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
10440                 oq_id) != 2);
10441         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
10442
10443         BUILD_BUG_ON(offsetof(struct pqi_event_config,
10444                 num_event_descriptors) != 2);
10445         BUILD_BUG_ON(offsetof(struct pqi_event_config,
10446                 descriptors) != 4);
10447
10448         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
10449                 ARRAY_SIZE(pqi_supported_event_types));
10450
10451         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10452                 header.iu_type) != 0);
10453         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10454                 header.iu_length) != 2);
10455         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10456                 event_type) != 8);
10457         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10458                 event_id) != 10);
10459         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10460                 additional_event_id) != 12);
10461         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10462                 data) != 16);
10463         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
10464
10465         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10466                 header.iu_type) != 0);
10467         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10468                 header.iu_length) != 2);
10469         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10470                 event_type) != 8);
10471         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10472                 event_id) != 10);
10473         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10474                 additional_event_id) != 12);
10475         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
10476
10477         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10478                 header.iu_type) != 0);
10479         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10480                 header.iu_length) != 2);
10481         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10482                 request_id) != 8);
10483         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10484                 nexus_id) != 10);
10485         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10486                 timeout) != 14);
10487         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10488                 lun_number) != 16);
10489         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10490                 protocol_specific) != 24);
10491         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10492                 outbound_queue_id_to_manage) != 26);
10493         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10494                 request_id_to_manage) != 28);
10495         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10496                 task_management_function) != 30);
10497         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
10498
10499         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10500                 header.iu_type) != 0);
10501         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10502                 header.iu_length) != 2);
10503         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10504                 request_id) != 8);
10505         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10506                 nexus_id) != 10);
10507         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10508                 additional_response_info) != 12);
10509         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10510                 response_code) != 15);
10511         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
10512
10513         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10514                 configured_logical_drive_count) != 0);
10515         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10516                 configuration_signature) != 1);
10517         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10518                 firmware_version_short) != 5);
10519         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10520                 extended_logical_unit_count) != 154);
10521         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10522                 firmware_build_number) != 190);
10523         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10524                 vendor_id) != 200);
10525         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10526                 product_id) != 208);
10527         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10528                 extra_controller_flags) != 286);
10529         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10530                 controller_mode) != 292);
10531         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10532                 spare_part_number) != 293);
10533         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10534                 firmware_version_long) != 325);
10535
10536         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10537                 phys_bay_in_box) != 115);
10538         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10539                 device_type) != 120);
10540         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10541                 redundant_path_present_map) != 1736);
10542         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10543                 active_path_number) != 1738);
10544         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10545                 alternate_paths_phys_connector) != 1739);
10546         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10547                 alternate_paths_phys_box_on_port) != 1755);
10548         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10549                 current_queue_depth_limit) != 1796);
10550         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
10551
10552         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_buffer_header) != 4);
10553         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10554                 page_code) != 0);
10555         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10556                 subpage_code) != 1);
10557         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10558                 buffer_length) != 2);
10559
10560         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_page_header) != 4);
10561         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10562                 page_code) != 0);
10563         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10564                 subpage_code) != 1);
10565         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10566                 page_length) != 2);
10567
10568         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_io_page_aio_subpage)
10569                 != 18);
10570         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10571                 header) != 0);
10572         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10573                 firmware_read_support) != 4);
10574         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10575                 driver_read_support) != 5);
10576         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10577                 firmware_write_support) != 6);
10578         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10579                 driver_write_support) != 7);
10580         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10581                 max_transfer_encrypted_sas_sata) != 8);
10582         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10583                 max_transfer_encrypted_nvme) != 10);
10584         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10585                 max_write_raid_5_6) != 12);
10586         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10587                 max_write_raid_1_10_2drive) != 14);
10588         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10589                 max_write_raid_1_10_3drive) != 16);
10590
10591         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
10592         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
10593         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
10594                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10595         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
10596                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10597         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
10598         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
10599                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10600         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
10601         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
10602                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10603
10604         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
10605         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
10606                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
10607 }