drivers/scsi/smartpqi/smartpqi_init.c

   1 /*
   2  *    driver for Microsemi PQI-based storage controllers
   3  *    Copyright (c) 2016-2017 Microsemi Corporation
   4  *    Copyright (c) 2016 PMC-Sierra, Inc.
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; version 2 of the License.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  14  *
  15  *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
  16  *
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/pci.h>
  22 #include <linux/delay.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/sched.h>
  25 #include <linux/rtc.h>
  26 #include <linux/bcd.h>
  27 #include <linux/reboot.h>
  28 #include <linux/cciss_ioctl.h>
  29 #include <linux/blk-mq-pci.h>
  30 #include <scsi/scsi_host.h>
  31 #include <scsi/scsi_cmnd.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_transport_sas.h>
  35 #include <asm/unaligned.h>
  36 #include "smartpqi.h"
  37 #include "smartpqi_sis.h"
  38
  39 #if !defined(BUILD_TIMESTAMP)
  40 #define BUILD_TIMESTAMP
  41 #endif
  42
  43 #define DRIVER_VERSION          "1.1.2-125"
  44 #define DRIVER_MAJOR            1
  45 #define DRIVER_MINOR            1
  46 #define DRIVER_RELEASE          2
  47 #define DRIVER_REVISION         125
  48
  49 #define DRIVER_NAME             "Microsemi PQI Driver (v" \
  50                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  51 #define DRIVER_NAME_SHORT       "smartpqi"
  52
  53 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  54
  55 MODULE_AUTHOR("Microsemi");
  56 MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
  57         DRIVER_VERSION);
  58 MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
  59 MODULE_VERSION(DRIVER_VERSION);
  60 MODULE_LICENSE("GPL");
  61
  62 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  63 static void pqi_ctrl_offline_worker(struct work_struct *work);
  64 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info);
  65 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  66 static void pqi_scan_start(struct Scsi_Host *shost);
  67 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  68         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  69         struct pqi_io_request *io_request);
  70 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  71         struct pqi_iu_header *request, unsigned int flags,
  72         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
  73 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  74         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  75         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  76         struct pqi_encryption_info *encryption_info, bool raid_bypass);
  77
  78 /* for flags argument to pqi_submit_raid_request_synchronous() */
  79 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  80
  81 static struct scsi_transport_template *pqi_sas_transport_template;
  82
  83 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  84
  85 enum pqi_lockup_action {
  86         NONE,
  87         REBOOT,
  88         PANIC
  89 };
  90
  91 static enum pqi_lockup_action pqi_lockup_action = NONE;
  92
  93 static struct {
  94         enum pqi_lockup_action  action;
  95         char                    *name;
  96 } pqi_lockup_actions[] = {
  97         {
  98                 .action = NONE,
  99                 .name = "none",
 100         },
 101         {
 102                 .action = REBOOT,
 103                 .name = "reboot",
 104         },
 105         {
 106                 .action = PANIC,
 107                 .name = "panic",
 108         },
 109 };
 110
 111 static unsigned int pqi_supported_event_types[] = {
 112         PQI_EVENT_TYPE_HOTPLUG,
 113         PQI_EVENT_TYPE_HARDWARE,
 114         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 115         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 116         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 117         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 118 };
 119
 120 static int pqi_disable_device_id_wildcards;
 121 module_param_named(disable_device_id_wildcards,
 122         pqi_disable_device_id_wildcards, int, 0644);
 123 MODULE_PARM_DESC(disable_device_id_wildcards,
 124         "Disable device ID wildcards.");
 125
 126 static int pqi_disable_heartbeat;
 127 module_param_named(disable_heartbeat,
 128         pqi_disable_heartbeat, int, 0644);
 129 MODULE_PARM_DESC(disable_heartbeat,
 130         "Disable heartbeat.");
 131
 132 static int pqi_disable_ctrl_shutdown;
 133 module_param_named(disable_ctrl_shutdown,
 134         pqi_disable_ctrl_shutdown, int, 0644);
 135 MODULE_PARM_DESC(disable_ctrl_shutdown,
 136         "Disable controller shutdown when controller locked up.");
 137
 138 static char *pqi_lockup_action_param;
 139 module_param_named(lockup_action,
 140         pqi_lockup_action_param, charp, 0644);
 141 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 142         "\t\tSupported: none, reboot, panic\n"
 143         "\t\tDefault: none");
 144
 145 static char *raid_levels[] = {
 146         "RAID-0",
 147         "RAID-4",
 148         "RAID-1(1+0)",
 149         "RAID-5",
 150         "RAID-5+1",
 151         "RAID-ADG",
 152         "RAID-1(ADM)",
 153 };
 154
 155 static char *pqi_raid_level_to_string(u8 raid_level)
 156 {
 157         if (raid_level < ARRAY_SIZE(raid_levels))
 158                 return raid_levels[raid_level];
 159
 160         return "RAID UNKNOWN";
 161 }
 162
 163 #define SA_RAID_0               0
 164 #define SA_RAID_4               1
 165 #define SA_RAID_1               2       /* also used for RAID 10 */
 166 #define SA_RAID_5               3       /* also used for RAID 50 */
 167 #define SA_RAID_51              4
 168 #define SA_RAID_6               5       /* also used for RAID 60 */
 169 #define SA_RAID_ADM             6       /* also used for RAID 1+0 ADM */
 170 #define SA_RAID_MAX             SA_RAID_ADM
 171 #define SA_RAID_UNKNOWN         0xff
 172
 173 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 174 {
 175         pqi_prep_for_scsi_done(scmd);
 176         scmd->scsi_done(scmd);
 177 }
 178
 179 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 180 {
 181         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 182 }
 183
 184 static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost)
 185 {
 186         void *hostdata = shost_priv(shost);
 187
 188         return *((struct pqi_ctrl_info **)hostdata);
 189 }
 190
 191 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 192 {
 193         return !device->is_physical_device;
 194 }
 195
 196 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 197 {
 198         return scsi3addr[2] != 0;
 199 }
 200
 201 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 202 {
 203         return !ctrl_info->controller_online;
 204 }
 205
 206 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 207 {
 208         if (ctrl_info->controller_online)
 209                 if (!sis_is_firmware_running(ctrl_info))
 210                         pqi_take_ctrl_offline(ctrl_info);
 211 }
 212
 213 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 214 {
 215         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 216 }
 217
 218 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
 219         struct pqi_ctrl_info *ctrl_info)
 220 {
 221         return sis_read_driver_scratch(ctrl_info);
 222 }
 223
 224 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 225         enum pqi_ctrl_mode mode)
 226 {
 227         sis_write_driver_scratch(ctrl_info, mode);
 228 }
 229
 230 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 231 {
 232         ctrl_info->block_requests = true;
 233         scsi_block_requests(ctrl_info->scsi_host);
 234 }
 235
 236 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 237 {
 238         ctrl_info->block_requests = false;
 239         wake_up_all(&ctrl_info->block_requests_wait);
 240         pqi_retry_raid_bypass_requests(ctrl_info);
 241         scsi_unblock_requests(ctrl_info->scsi_host);
 242 }
 243
 244 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 245 {
 246         return ctrl_info->block_requests;
 247 }
 248
 249 static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info,
 250         unsigned long timeout_msecs)
 251 {
 252         unsigned long remaining_msecs;
 253
 254         if (!pqi_ctrl_blocked(ctrl_info))
 255                 return timeout_msecs;
 256
 257         atomic_inc(&ctrl_info->num_blocked_threads);
 258
 259         if (timeout_msecs == NO_TIMEOUT) {
 260                 wait_event(ctrl_info->block_requests_wait,
 261                         !pqi_ctrl_blocked(ctrl_info));
 262                 remaining_msecs = timeout_msecs;
 263         } else {
 264                 unsigned long remaining_jiffies;
 265
 266                 remaining_jiffies =
 267                         wait_event_timeout(ctrl_info->block_requests_wait,
 268                                 !pqi_ctrl_blocked(ctrl_info),
 269                                 msecs_to_jiffies(timeout_msecs));
 270                 remaining_msecs = jiffies_to_msecs(remaining_jiffies);
 271         }
 272
 273         atomic_dec(&ctrl_info->num_blocked_threads);
 274
 275         return remaining_msecs;
 276 }
 277
 278 static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
 279 {
 280         atomic_inc(&ctrl_info->num_busy_threads);
 281 }
 282
 283 static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
 284 {
 285         atomic_dec(&ctrl_info->num_busy_threads);
 286 }
 287
 288 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 289 {
 290         while (atomic_read(&ctrl_info->num_busy_threads) >
 291                 atomic_read(&ctrl_info->num_blocked_threads))
 292                 usleep_range(1000, 2000);
 293 }
 294
 295 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 296 {
 297         return device->device_offline;
 298 }
 299
 300 static inline void pqi_device_reset_start(struct pqi_scsi_dev *device)
 301 {
 302         device->in_reset = true;
 303 }
 304
 305 static inline void pqi_device_reset_done(struct pqi_scsi_dev *device)
 306 {
 307         device->in_reset = false;
 308 }
 309
 310 static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device)
 311 {
 312         return device->in_reset;
 313 }
 314
 315 static inline void pqi_schedule_rescan_worker_with_delay(
 316         struct pqi_ctrl_info *ctrl_info, unsigned long delay)
 317 {
 318         if (pqi_ctrl_offline(ctrl_info))
 319                 return;
 320
 321         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 322 }
 323
 324 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 325 {
 326         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 327 }
 328
 329 #define PQI_RESCAN_WORK_DELAY  (10 * HZ)
 330
 331 static inline void pqi_schedule_rescan_worker_delayed(
 332         struct pqi_ctrl_info *ctrl_info)
 333 {
 334         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 335 }
 336
 337 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 338 {
 339         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 340 }
 341
 342 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 343 {
 344         if (!ctrl_info->heartbeat_counter)
 345                 return 0;
 346
 347         return readl(ctrl_info->heartbeat_counter);
 348 }
 349
 350 static int pqi_map_single(struct pci_dev *pci_dev,
 351         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 352         size_t buffer_length, int data_direction)
 353 {
 354         dma_addr_t bus_address;
 355
 356         if (!buffer || buffer_length == 0 || data_direction == PCI_DMA_NONE)
 357                 return 0;
 358
 359         bus_address = pci_map_single(pci_dev, buffer, buffer_length,
 360                 data_direction);
 361         if (pci_dma_mapping_error(pci_dev, bus_address))
 362                 return -ENOMEM;
 363
 364         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 365         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 366         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 367
 368         return 0;
 369 }
 370
 371 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 372         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 373         int data_direction)
 374 {
 375         int i;
 376
 377         if (data_direction == PCI_DMA_NONE)
 378                 return;
 379
 380         for (i = 0; i < num_descriptors; i++)
 381                 pci_unmap_single(pci_dev,
 382                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 383                         get_unaligned_le32(&descriptors[i].length),
 384                         data_direction);
 385 }
 386
 387 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 388         struct pqi_raid_path_request *request, u8 cmd,
 389         u8 *scsi3addr, void *buffer, size_t buffer_length,
 390         u16 vpd_page, int *pci_direction)
 391 {
 392         u8 *cdb;
 393         int pci_dir;
 394
 395         memset(request, 0, sizeof(*request));
 396
 397         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 398         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 399                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 400                 &request->header.iu_length);
 401         put_unaligned_le32(buffer_length, &request->buffer_length);
 402         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 403         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 404         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 405
 406         cdb = request->cdb;
 407
 408         switch (cmd) {
 409         case INQUIRY:
 410                 request->data_direction = SOP_READ_FLAG;
 411                 cdb[0] = INQUIRY;
 412                 if (vpd_page & VPD_PAGE) {
 413                         cdb[1] = 0x1;
 414                         cdb[2] = (u8)vpd_page;
 415                 }
 416                 cdb[4] = (u8)buffer_length;
 417                 break;
 418         case CISS_REPORT_LOG:
 419         case CISS_REPORT_PHYS:
 420                 request->data_direction = SOP_READ_FLAG;
 421                 cdb[0] = cmd;
 422                 if (cmd == CISS_REPORT_PHYS)
 423                         cdb[1] = CISS_REPORT_PHYS_EXTENDED;
 424                 else
 425                         cdb[1] = CISS_REPORT_LOG_EXTENDED;
 426                 put_unaligned_be32(buffer_length, &cdb[6]);
 427                 break;
 428         case CISS_GET_RAID_MAP:
 429                 request->data_direction = SOP_READ_FLAG;
 430                 cdb[0] = CISS_READ;
 431                 cdb[1] = CISS_GET_RAID_MAP;
 432                 put_unaligned_be32(buffer_length, &cdb[6]);
 433                 break;
 434         case SA_FLUSH_CACHE:
 435                 request->data_direction = SOP_WRITE_FLAG;
 436                 cdb[0] = BMIC_WRITE;
 437                 cdb[6] = BMIC_FLUSH_CACHE;
 438                 put_unaligned_be16(buffer_length, &cdb[7]);
 439                 break;
 440         case BMIC_IDENTIFY_CONTROLLER:
 441         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 442                 request->data_direction = SOP_READ_FLAG;
 443                 cdb[0] = BMIC_READ;
 444                 cdb[6] = cmd;
 445                 put_unaligned_be16(buffer_length, &cdb[7]);
 446                 break;
 447         case BMIC_WRITE_HOST_WELLNESS:
 448                 request->data_direction = SOP_WRITE_FLAG;
 449                 cdb[0] = BMIC_WRITE;
 450                 cdb[6] = cmd;
 451                 put_unaligned_be16(buffer_length, &cdb[7]);
 452                 break;
 453         default:
 454                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
 455                         cmd);
 456                 break;
 457         }
 458
 459         switch (request->data_direction) {
 460         case SOP_READ_FLAG:
 461                 pci_dir = PCI_DMA_FROMDEVICE;
 462                 break;
 463         case SOP_WRITE_FLAG:
 464                 pci_dir = PCI_DMA_TODEVICE;
 465                 break;
 466         case SOP_NO_DIRECTION_FLAG:
 467                 pci_dir = PCI_DMA_NONE;
 468                 break;
 469         default:
 470                 pci_dir = PCI_DMA_BIDIRECTIONAL;
 471                 break;
 472         }
 473
 474         *pci_direction = pci_dir;
 475
 476         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 477                 buffer, buffer_length, pci_dir);
 478 }
 479
 480 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 481 {
 482         io_request->scmd = NULL;
 483         io_request->status = 0;
 484         io_request->error_info = NULL;
 485         io_request->raid_bypass = false;
 486 }
 487
 488 static struct pqi_io_request *pqi_alloc_io_request(
 489         struct pqi_ctrl_info *ctrl_info)
 490 {
 491         struct pqi_io_request *io_request;
 492         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 493
 494         while (1) {
 495                 io_request = &ctrl_info->io_request_pool[i];
 496                 if (atomic_inc_return(&io_request->refcount) == 1)
 497                         break;
 498                 atomic_dec(&io_request->refcount);
 499                 i = (i + 1) % ctrl_info->max_io_slots;
 500         }
 501
 502         /* benignly racy */
 503         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 504
 505         pqi_reinit_io_request(io_request);
 506
 507         return io_request;
 508 }
 509
 510 static void pqi_free_io_request(struct pqi_io_request *io_request)
 511 {
 512         atomic_dec(&io_request->refcount);
 513 }
 514
 515 static int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 516         struct bmic_identify_controller *buffer)
 517 {
 518         int rc;
 519         int pci_direction;
 520         struct pqi_raid_path_request request;
 521
 522         rc = pqi_build_raid_path_request(ctrl_info, &request,
 523                 BMIC_IDENTIFY_CONTROLLER, RAID_CTLR_LUNID, buffer,
 524                 sizeof(*buffer), 0, &pci_direction);
 525         if (rc)
 526                 return rc;
 527
 528         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 529                 NULL, NO_TIMEOUT);
 530
 531         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 532                 pci_direction);
 533
 534         return rc;
 535 }
 536
 537 static int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 538         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 539 {
 540         int rc;
 541         int pci_direction;
 542         struct pqi_raid_path_request request;
 543
 544         rc = pqi_build_raid_path_request(ctrl_info, &request,
 545                 INQUIRY, scsi3addr, buffer, buffer_length, vpd_page,
 546                 &pci_direction);
 547         if (rc)
 548                 return rc;
 549
 550         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 551                 NULL, NO_TIMEOUT);
 552
 553         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 554                 pci_direction);
 555
 556         return rc;
 557 }
 558
 559 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 560         struct pqi_scsi_dev *device,
 561         struct bmic_identify_physical_device *buffer,
 562         size_t buffer_length)
 563 {
 564         int rc;
 565         int pci_direction;
 566         u16 bmic_device_index;
 567         struct pqi_raid_path_request request;
 568
 569         rc = pqi_build_raid_path_request(ctrl_info, &request,
 570                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 571                 buffer_length, 0, &pci_direction);
 572         if (rc)
 573                 return rc;
 574
 575         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 576         request.cdb[2] = (u8)bmic_device_index;
 577         request.cdb[9] = (u8)(bmic_device_index >> 8);
 578
 579         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 580                 0, NULL, NO_TIMEOUT);
 581
 582         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 583                 pci_direction);
 584
 585         return rc;
 586 }
 587
 588 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 589         enum bmic_flush_cache_shutdown_event shutdown_event)
 590 {
 591         int rc;
 592         struct pqi_raid_path_request request;
 593         int pci_direction;
 594         struct bmic_flush_cache *flush_cache;
 595
 596         /*
 597          * Don't bother trying to flush the cache if the controller is
 598          * locked up.
 599          */
 600         if (pqi_ctrl_offline(ctrl_info))
 601                 return -ENXIO;
 602
 603         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 604         if (!flush_cache)
 605                 return -ENOMEM;
 606
 607         flush_cache->shutdown_event = shutdown_event;
 608
 609         rc = pqi_build_raid_path_request(ctrl_info, &request,
 610                 SA_FLUSH_CACHE, RAID_CTLR_LUNID, flush_cache,
 611                 sizeof(*flush_cache), 0, &pci_direction);
 612         if (rc)
 613                 goto out;
 614
 615         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 616                 0, NULL, NO_TIMEOUT);
 617
 618         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 619                 pci_direction);
 620
 621 out:
 622         kfree(flush_cache);
 623
 624         return rc;
 625 }
 626
 627 static int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 628         void *buffer, size_t buffer_length)
 629 {
 630         int rc;
 631         struct pqi_raid_path_request request;
 632         int pci_direction;
 633
 634         rc = pqi_build_raid_path_request(ctrl_info, &request,
 635                 BMIC_WRITE_HOST_WELLNESS, RAID_CTLR_LUNID, buffer,
 636                 buffer_length, 0, &pci_direction);
 637         if (rc)
 638                 return rc;
 639
 640         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 641                 0, NULL, NO_TIMEOUT);
 642
 643         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 644                 pci_direction);
 645
 646         return rc;
 647 }
 648
 649 #pragma pack(1)
 650
 651 struct bmic_host_wellness_driver_version {
 652         u8      start_tag[4];
 653         u8      driver_version_tag[2];
 654         __le16  driver_version_length;
 655         char    driver_version[32];
 656         u8      end_tag[2];
 657 };
 658
 659 #pragma pack()
 660
 661 static int pqi_write_driver_version_to_host_wellness(
 662         struct pqi_ctrl_info *ctrl_info)
 663 {
 664         int rc;
 665         struct bmic_host_wellness_driver_version *buffer;
 666         size_t buffer_length;
 667
 668         buffer_length = sizeof(*buffer);
 669
 670         buffer = kmalloc(buffer_length, GFP_KERNEL);
 671         if (!buffer)
 672                 return -ENOMEM;
 673
 674         buffer->start_tag[0] = '<';
 675         buffer->start_tag[1] = 'H';
 676         buffer->start_tag[2] = 'W';
 677         buffer->start_tag[3] = '>';
 678         buffer->driver_version_tag[0] = 'D';
 679         buffer->driver_version_tag[1] = 'V';
 680         put_unaligned_le16(sizeof(buffer->driver_version),
 681                 &buffer->driver_version_length);
 682         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 683                 sizeof(buffer->driver_version) - 1);
 684         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 685         buffer->end_tag[0] = 'Z';
 686         buffer->end_tag[1] = 'Z';
 687
 688         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 689
 690         kfree(buffer);
 691
 692         return rc;
 693 }
 694
 695 #pragma pack(1)
 696
 697 struct bmic_host_wellness_time {
 698         u8      start_tag[4];
 699         u8      time_tag[2];
 700         __le16  time_length;
 701         u8      time[8];
 702         u8      dont_write_tag[2];
 703         u8      end_tag[2];
 704 };
 705
 706 #pragma pack()
 707
 708 static int pqi_write_current_time_to_host_wellness(
 709         struct pqi_ctrl_info *ctrl_info)
 710 {
 711         int rc;
 712         struct bmic_host_wellness_time *buffer;
 713         size_t buffer_length;
 714         time64_t local_time;
 715         unsigned int year;
 716         struct tm tm;
 717
 718         buffer_length = sizeof(*buffer);
 719
 720         buffer = kmalloc(buffer_length, GFP_KERNEL);
 721         if (!buffer)
 722                 return -ENOMEM;
 723
 724         buffer->start_tag[0] = '<';
 725         buffer->start_tag[1] = 'H';
 726         buffer->start_tag[2] = 'W';
 727         buffer->start_tag[3] = '>';
 728         buffer->time_tag[0] = 'T';
 729         buffer->time_tag[1] = 'D';
 730         put_unaligned_le16(sizeof(buffer->time),
 731                 &buffer->time_length);
 732
 733         local_time = ktime_get_real_seconds();
 734         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 735         year = tm.tm_year + 1900;
 736
 737         buffer->time[0] = bin2bcd(tm.tm_hour);
 738         buffer->time[1] = bin2bcd(tm.tm_min);
 739         buffer->time[2] = bin2bcd(tm.tm_sec);
 740         buffer->time[3] = 0;
 741         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 742         buffer->time[5] = bin2bcd(tm.tm_mday);
 743         buffer->time[6] = bin2bcd(year / 100);
 744         buffer->time[7] = bin2bcd(year % 100);
 745
 746         buffer->dont_write_tag[0] = 'D';
 747         buffer->dont_write_tag[1] = 'W';
 748         buffer->end_tag[0] = 'Z';
 749         buffer->end_tag[1] = 'Z';
 750
 751         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 752
 753         kfree(buffer);
 754
 755         return rc;
 756 }
 757
 758 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * HZ)
 759
 760 static void pqi_update_time_worker(struct work_struct *work)
 761 {
 762         int rc;
 763         struct pqi_ctrl_info *ctrl_info;
 764
 765         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 766                 update_time_work);
 767
 768         if (pqi_ctrl_offline(ctrl_info))
 769                 return;
 770
 771         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 772         if (rc)
 773                 dev_warn(&ctrl_info->pci_dev->dev,
 774                         "error updating time on controller\n");
 775
 776         schedule_delayed_work(&ctrl_info->update_time_work,
 777                 PQI_UPDATE_TIME_WORK_INTERVAL);
 778 }
 779
 780 static inline void pqi_schedule_update_time_worker(
 781         struct pqi_ctrl_info *ctrl_info)
 782 {
 783         schedule_delayed_work(&ctrl_info->update_time_work, 0);
 784 }
 785
 786 static inline void pqi_cancel_update_time_worker(
 787         struct pqi_ctrl_info *ctrl_info)
 788 {
 789         cancel_delayed_work_sync(&ctrl_info->update_time_work);
 790 }
 791
 792 static int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 793         void *buffer, size_t buffer_length)
 794 {
 795         int rc;
 796         int pci_direction;
 797         struct pqi_raid_path_request request;
 798
 799         rc = pqi_build_raid_path_request(ctrl_info, &request,
 800                 cmd, RAID_CTLR_LUNID, buffer, buffer_length, 0, &pci_direction);
 801         if (rc)
 802                 return rc;
 803
 804         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 805                 NULL, NO_TIMEOUT);
 806
 807         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 808                 pci_direction);
 809
 810         return rc;
 811 }
 812
 813 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 814         void **buffer)
 815 {
 816         int rc;
 817         size_t lun_list_length;
 818         size_t lun_data_length;
 819         size_t new_lun_list_length;
 820         void *lun_data = NULL;
 821         struct report_lun_header *report_lun_header;
 822
 823         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 824         if (!report_lun_header) {
 825                 rc = -ENOMEM;
 826                 goto out;
 827         }
 828
 829         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 830                 sizeof(*report_lun_header));
 831         if (rc)
 832                 goto out;
 833
 834         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 835
 836 again:
 837         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 838
 839         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 840         if (!lun_data) {
 841                 rc = -ENOMEM;
 842                 goto out;
 843         }
 844
 845         if (lun_list_length == 0) {
 846                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 847                 goto out;
 848         }
 849
 850         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 851         if (rc)
 852                 goto out;
 853
 854         new_lun_list_length = get_unaligned_be32(
 855                 &((struct report_lun_header *)lun_data)->list_length);
 856
 857         if (new_lun_list_length > lun_list_length) {
 858                 lun_list_length = new_lun_list_length;
 859                 kfree(lun_data);
 860                 goto again;
 861         }
 862
 863 out:
 864         kfree(report_lun_header);
 865
 866         if (rc) {
 867                 kfree(lun_data);
 868                 lun_data = NULL;
 869         }
 870
 871         *buffer = lun_data;
 872
 873         return rc;
 874 }
 875
 876 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
 877         void **buffer)
 878 {
 879         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
 880                 buffer);
 881 }
 882
 883 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
 884         void **buffer)
 885 {
 886         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
 887 }
 888
 889 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
 890         struct report_phys_lun_extended **physdev_list,
 891         struct report_log_lun_extended **logdev_list)
 892 {
 893         int rc;
 894         size_t logdev_list_length;
 895         size_t logdev_data_length;
 896         struct report_log_lun_extended *internal_logdev_list;
 897         struct report_log_lun_extended *logdev_data;
 898         struct report_lun_header report_lun_header;
 899
 900         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
 901         if (rc)
 902                 dev_err(&ctrl_info->pci_dev->dev,
 903                         "report physical LUNs failed\n");
 904
 905         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
 906         if (rc)
 907                 dev_err(&ctrl_info->pci_dev->dev,
 908                         "report logical LUNs failed\n");
 909
 910         /*
 911          * Tack the controller itself onto the end of the logical device list.
 912          */
 913
 914         logdev_data = *logdev_list;
 915
 916         if (logdev_data) {
 917                 logdev_list_length =
 918                         get_unaligned_be32(&logdev_data->header.list_length);
 919         } else {
 920                 memset(&report_lun_header, 0, sizeof(report_lun_header));
 921                 logdev_data =
 922                         (struct report_log_lun_extended *)&report_lun_header;
 923                 logdev_list_length = 0;
 924         }
 925
 926         logdev_data_length = sizeof(struct report_lun_header) +
 927                 logdev_list_length;
 928
 929         internal_logdev_list = kmalloc(logdev_data_length +
 930                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
 931         if (!internal_logdev_list) {
 932                 kfree(*logdev_list);
 933                 *logdev_list = NULL;
 934                 return -ENOMEM;
 935         }
 936
 937         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
 938         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
 939                 sizeof(struct report_log_lun_extended_entry));
 940         put_unaligned_be32(logdev_list_length +
 941                 sizeof(struct report_log_lun_extended_entry),
 942                 &internal_logdev_list->header.list_length);
 943
 944         kfree(*logdev_list);
 945         *logdev_list = internal_logdev_list;
 946
 947         return 0;
 948 }
 949
 950 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
 951         int bus, int target, int lun)
 952 {
 953         device->bus = bus;
 954         device->target = target;
 955         device->lun = lun;
 956 }
 957
 958 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
 959 {
 960         u8 *scsi3addr;
 961         u32 lunid;
 962         int bus;
 963         int target;
 964         int lun;
 965
 966         scsi3addr = device->scsi3addr;
 967         lunid = get_unaligned_le32(scsi3addr);
 968
 969         if (pqi_is_hba_lunid(scsi3addr)) {
 970                 /* The specified device is the controller. */
 971                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
 972                 device->target_lun_valid = true;
 973                 return;
 974         }
 975
 976         if (pqi_is_logical_device(device)) {
 977                 if (device->is_external_raid_device) {
 978                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
 979                         target = (lunid >> 16) & 0x3fff;
 980                         lun = lunid & 0xff;
 981                 } else {
 982                         bus = PQI_RAID_VOLUME_BUS;
 983                         target = 0;
 984                         lun = lunid & 0x3fff;
 985                 }
 986                 pqi_set_bus_target_lun(device, bus, target, lun);
 987                 device->target_lun_valid = true;
 988                 return;
 989         }
 990
 991         /*
 992          * Defer target and LUN assignment for non-controller physical devices
 993          * because the SAS transport layer will make these assignments later.
 994          */
 995         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
 996 }
 997
 998 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
 999         struct pqi_scsi_dev *device)
1000 {
1001         int rc;
1002         u8 raid_level;
1003         u8 *buffer;
1004
1005         raid_level = SA_RAID_UNKNOWN;
1006
1007         buffer = kmalloc(64, GFP_KERNEL);
1008         if (buffer) {
1009                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1010                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1011                 if (rc == 0) {
1012                         raid_level = buffer[8];
1013                         if (raid_level > SA_RAID_MAX)
1014                                 raid_level = SA_RAID_UNKNOWN;
1015                 }
1016                 kfree(buffer);
1017         }
1018
1019         device->raid_level = raid_level;
1020 }
1021
1022 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1023         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1024 {
1025         char *err_msg;
1026         u32 raid_map_size;
1027         u32 r5or6_blocks_per_row;
1028         unsigned int num_phys_disks;
1029         unsigned int num_raid_map_entries;
1030
1031         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1032
1033         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1034                 err_msg = "RAID map too small";
1035                 goto bad_raid_map;
1036         }
1037
1038         if (raid_map_size > sizeof(*raid_map)) {
1039                 err_msg = "RAID map too large";
1040                 goto bad_raid_map;
1041         }
1042
1043         num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
1044                 (get_unaligned_le16(&raid_map->data_disks_per_row) +
1045                 get_unaligned_le16(&raid_map->metadata_disks_per_row));
1046         num_raid_map_entries = num_phys_disks *
1047                 get_unaligned_le16(&raid_map->row_cnt);
1048
1049         if (num_raid_map_entries > RAID_MAP_MAX_ENTRIES) {
1050                 err_msg = "invalid number of map entries in RAID map";
1051                 goto bad_raid_map;
1052         }
1053
1054         if (device->raid_level == SA_RAID_1) {
1055                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1056                         err_msg = "invalid RAID-1 map";
1057                         goto bad_raid_map;
1058                 }
1059         } else if (device->raid_level == SA_RAID_ADM) {
1060                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1061                         err_msg = "invalid RAID-1(ADM) map";
1062                         goto bad_raid_map;
1063                 }
1064         } else if ((device->raid_level == SA_RAID_5 ||
1065                 device->raid_level == SA_RAID_6) &&
1066                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1067                 /* RAID 50/60 */
1068                 r5or6_blocks_per_row =
1069                         get_unaligned_le16(&raid_map->strip_size) *
1070                         get_unaligned_le16(&raid_map->data_disks_per_row);
1071                 if (r5or6_blocks_per_row == 0) {
1072                         err_msg = "invalid RAID-5 or RAID-6 map";
1073                         goto bad_raid_map;
1074                 }
1075         }
1076
1077         return 0;
1078
1079 bad_raid_map:
1080         dev_warn(&ctrl_info->pci_dev->dev,
1081                 "scsi %d:%d:%d:%d %s\n",
1082                 ctrl_info->scsi_host->host_no,
1083                 device->bus, device->target, device->lun, err_msg);
1084
1085         return -EINVAL;
1086 }
1087
1088 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1089         struct pqi_scsi_dev *device)
1090 {
1091         int rc;
1092         int pci_direction;
1093         struct pqi_raid_path_request request;
1094         struct raid_map *raid_map;
1095
1096         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1097         if (!raid_map)
1098                 return -ENOMEM;
1099
1100         rc = pqi_build_raid_path_request(ctrl_info, &request,
1101                 CISS_GET_RAID_MAP, device->scsi3addr, raid_map,
1102                 sizeof(*raid_map), 0, &pci_direction);
1103         if (rc)
1104                 goto error;
1105
1106         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
1107                 NULL, NO_TIMEOUT);
1108
1109         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
1110                 pci_direction);
1111
1112         if (rc)
1113                 goto error;
1114
1115         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1116         if (rc)
1117                 goto error;
1118
1119         device->raid_map = raid_map;
1120
1121         return 0;
1122
1123 error:
1124         kfree(raid_map);
1125
1126         return rc;
1127 }
1128
1129 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1130         struct pqi_scsi_dev *device)
1131 {
1132         int rc;
1133         u8 *buffer;
1134         u8 bypass_status;
1135
1136         buffer = kmalloc(64, GFP_KERNEL);
1137         if (!buffer)
1138                 return;
1139
1140         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1141                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1142         if (rc)
1143                 goto out;
1144
1145 #define RAID_BYPASS_STATUS      4
1146 #define RAID_BYPASS_CONFIGURED  0x1
1147 #define RAID_BYPASS_ENABLED     0x2
1148
1149         bypass_status = buffer[RAID_BYPASS_STATUS];
1150         device->raid_bypass_configured =
1151                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1152         if (device->raid_bypass_configured &&
1153                 (bypass_status & RAID_BYPASS_ENABLED) &&
1154                 pqi_get_raid_map(ctrl_info, device) == 0)
1155                 device->raid_bypass_enabled = true;
1156
1157 out:
1158         kfree(buffer);
1159 }
1160
1161 /*
1162  * Use vendor-specific VPD to determine online/offline status of a volume.
1163  */
1164
1165 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1166         struct pqi_scsi_dev *device)
1167 {
1168         int rc;
1169         size_t page_length;
1170         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1171         bool volume_offline = true;
1172         u32 volume_flags;
1173         struct ciss_vpd_logical_volume_status *vpd;
1174
1175         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1176         if (!vpd)
1177                 goto no_buffer;
1178
1179         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1180                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1181         if (rc)
1182                 goto out;
1183
1184         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1185                 volume_status) + vpd->page_length;
1186         if (page_length < sizeof(*vpd))
1187                 goto out;
1188
1189         volume_status = vpd->volume_status;
1190         volume_flags = get_unaligned_be32(&vpd->flags);
1191         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1192
1193 out:
1194         kfree(vpd);
1195 no_buffer:
1196         device->volume_status = volume_status;
1197         device->volume_offline = volume_offline;
1198 }
1199
1200 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1201         struct pqi_scsi_dev *device)
1202 {
1203         int rc;
1204         u8 *buffer;
1205
1206         buffer = kmalloc(64, GFP_KERNEL);
1207         if (!buffer)
1208                 return -ENOMEM;
1209
1210         /* Send an inquiry to the device to see what it is. */
1211         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1212         if (rc)
1213                 goto out;
1214
1215         scsi_sanitize_inquiry_string(&buffer[8], 8);
1216         scsi_sanitize_inquiry_string(&buffer[16], 16);
1217
1218         device->devtype = buffer[0] & 0x1f;
1219         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1220         memcpy(device->model, &buffer[16], sizeof(device->model));
1221
1222         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
1223                 if (device->is_external_raid_device) {
1224                         device->raid_level = SA_RAID_UNKNOWN;
1225                         device->volume_status = CISS_LV_OK;
1226                         device->volume_offline = false;
1227                 } else {
1228                         pqi_get_raid_level(ctrl_info, device);
1229                         pqi_get_raid_bypass_status(ctrl_info, device);
1230                         pqi_get_volume_status(ctrl_info, device);
1231                 }
1232         }
1233
1234 out:
1235         kfree(buffer);
1236
1237         return rc;
1238 }
1239
1240 static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
1241         struct pqi_scsi_dev *device,
1242         struct bmic_identify_physical_device *id_phys)
1243 {
1244         int rc;
1245
1246         memset(id_phys, 0, sizeof(*id_phys));
1247
1248         rc = pqi_identify_physical_device(ctrl_info, device,
1249                 id_phys, sizeof(*id_phys));
1250         if (rc) {
1251                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1252                 return;
1253         }
1254
1255         device->queue_depth =
1256                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1257         device->device_type = id_phys->device_type;
1258         device->active_path_index = id_phys->active_path_number;
1259         device->path_map = id_phys->redundant_path_present_map;
1260         memcpy(&device->box,
1261                 &id_phys->alternate_paths_phys_box_on_port,
1262                 sizeof(device->box));
1263         memcpy(&device->phys_connector,
1264                 &id_phys->alternate_paths_phys_connector,
1265                 sizeof(device->phys_connector));
1266         device->bay = id_phys->phys_bay_in_box;
1267 }
1268
1269 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1270         struct pqi_scsi_dev *device)
1271 {
1272         char *status;
1273         static const char unknown_state_str[] =
1274                 "Volume is in an unknown state (%u)";
1275         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1276
1277         switch (device->volume_status) {
1278         case CISS_LV_OK:
1279                 status = "Volume online";
1280                 break;
1281         case CISS_LV_FAILED:
1282                 status = "Volume failed";
1283                 break;
1284         case CISS_LV_NOT_CONFIGURED:
1285                 status = "Volume not configured";
1286                 break;
1287         case CISS_LV_DEGRADED:
1288                 status = "Volume degraded";
1289                 break;
1290         case CISS_LV_READY_FOR_RECOVERY:
1291                 status = "Volume ready for recovery operation";
1292                 break;
1293         case CISS_LV_UNDERGOING_RECOVERY:
1294                 status = "Volume undergoing recovery";
1295                 break;
1296         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1297                 status = "Wrong physical drive was replaced";
1298                 break;
1299         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1300                 status = "A physical drive not properly connected";
1301                 break;
1302         case CISS_LV_HARDWARE_OVERHEATING:
1303                 status = "Hardware is overheating";
1304                 break;
1305         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1306                 status = "Hardware has overheated";
1307                 break;
1308         case CISS_LV_UNDERGOING_EXPANSION:
1309                 status = "Volume undergoing expansion";
1310                 break;
1311         case CISS_LV_NOT_AVAILABLE:
1312                 status = "Volume waiting for transforming volume";
1313                 break;
1314         case CISS_LV_QUEUED_FOR_EXPANSION:
1315                 status = "Volume queued for expansion";
1316                 break;
1317         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1318                 status = "Volume disabled due to SCSI ID conflict";
1319                 break;
1320         case CISS_LV_EJECTED:
1321                 status = "Volume has been ejected";
1322                 break;
1323         case CISS_LV_UNDERGOING_ERASE:
1324                 status = "Volume undergoing background erase";
1325                 break;
1326         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1327                 status = "Volume ready for predictive spare rebuild";
1328                 break;
1329         case CISS_LV_UNDERGOING_RPI:
1330                 status = "Volume undergoing rapid parity initialization";
1331                 break;
1332         case CISS_LV_PENDING_RPI:
1333                 status = "Volume queued for rapid parity initialization";
1334                 break;
1335         case CISS_LV_ENCRYPTED_NO_KEY:
1336                 status = "Encrypted volume inaccessible - key not present";
1337                 break;
1338         case CISS_LV_UNDERGOING_ENCRYPTION:
1339                 status = "Volume undergoing encryption process";
1340                 break;
1341         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1342                 status = "Volume undergoing encryption re-keying process";
1343                 break;
1344         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1345                 status = "Volume encrypted but encryption is disabled";
1346                 break;
1347         case CISS_LV_PENDING_ENCRYPTION:
1348                 status = "Volume pending migration to encrypted state";
1349                 break;
1350         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1351                 status = "Volume pending encryption rekeying";
1352                 break;
1353         case CISS_LV_NOT_SUPPORTED:
1354                 status = "Volume not supported on this controller";
1355                 break;
1356         case CISS_LV_STATUS_UNAVAILABLE:
1357                 status = "Volume status not available";
1358                 break;
1359         default:
1360                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1361                         unknown_state_str, device->volume_status);
1362                 status = unknown_state_buffer;
1363                 break;
1364         }
1365
1366         dev_info(&ctrl_info->pci_dev->dev,
1367                 "scsi %d:%d:%d:%d %s\n",
1368                 ctrl_info->scsi_host->host_no,
1369                 device->bus, device->target, device->lun, status);
1370 }
1371
1372 static void pqi_rescan_worker(struct work_struct *work)
1373 {
1374         struct pqi_ctrl_info *ctrl_info;
1375
1376         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1377                 rescan_work);
1378
1379         pqi_scan_scsi_devices(ctrl_info);
1380 }
1381
1382 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1383         struct pqi_scsi_dev *device)
1384 {
1385         int rc;
1386
1387         if (pqi_is_logical_device(device))
1388                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1389                         device->target, device->lun);
1390         else
1391                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1392
1393         return rc;
1394 }
1395
1396 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1397         struct pqi_scsi_dev *device)
1398 {
1399         if (pqi_is_logical_device(device))
1400                 scsi_remove_device(device->sdev);
1401         else
1402                 pqi_remove_sas_device(device);
1403 }
1404
1405 /* Assumes the SCSI device list lock is held. */
1406
1407 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1408         int bus, int target, int lun)
1409 {
1410         struct pqi_scsi_dev *device;
1411
1412         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1413                 scsi_device_list_entry)
1414                 if (device->bus == bus && device->target == target &&
1415                         device->lun == lun)
1416                         return device;
1417
1418         return NULL;
1419 }
1420
1421 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1422         struct pqi_scsi_dev *dev2)
1423 {
1424         if (dev1->is_physical_device != dev2->is_physical_device)
1425                 return false;
1426
1427         if (dev1->is_physical_device)
1428                 return dev1->wwid == dev2->wwid;
1429
1430         return memcmp(dev1->volume_id, dev2->volume_id,
1431                 sizeof(dev1->volume_id)) == 0;
1432 }
1433
1434 enum pqi_find_result {
1435         DEVICE_NOT_FOUND,
1436         DEVICE_CHANGED,
1437         DEVICE_SAME,
1438 };
1439
1440 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1441         struct pqi_scsi_dev *device_to_find,
1442         struct pqi_scsi_dev **matching_device)
1443 {
1444         struct pqi_scsi_dev *device;
1445
1446         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1447                 scsi_device_list_entry) {
1448                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
1449                         device->scsi3addr)) {
1450                         *matching_device = device;
1451                         if (pqi_device_equal(device_to_find, device)) {
1452                                 if (device_to_find->volume_offline)
1453                                         return DEVICE_CHANGED;
1454                                 return DEVICE_SAME;
1455                         }
1456                         return DEVICE_CHANGED;
1457                 }
1458         }
1459
1460         return DEVICE_NOT_FOUND;
1461 }
1462
1463 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1464
1465 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1466         char *action, struct pqi_scsi_dev *device)
1467 {
1468         ssize_t count;
1469         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1470
1471         count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1472                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1473
1474         if (device->target_lun_valid)
1475                 count += snprintf(buffer + count,
1476                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1477                         "%d:%d",
1478                         device->target,
1479                         device->lun);
1480         else
1481                 count += snprintf(buffer + count,
1482                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1483                         "-:-");
1484
1485         if (pqi_is_logical_device(device))
1486                 count += snprintf(buffer + count,
1487                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1488                         " %08x%08x",
1489                         *((u32 *)&device->scsi3addr),
1490                         *((u32 *)&device->scsi3addr[4]));
1491         else
1492                 count += snprintf(buffer + count,
1493                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1494                         " %016llx", device->sas_address);
1495
1496         count += snprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1497                 " %s %.8s %.16s ",
1498                 scsi_device_type(device->devtype),
1499                 device->vendor,
1500                 device->model);
1501
1502         if (pqi_is_logical_device(device)) {
1503                 if (device->devtype == TYPE_DISK)
1504                         count += snprintf(buffer + count,
1505                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1506                                 "SSDSmartPathCap%c En%c %-12s",
1507                                 device->raid_bypass_configured ? '+' : '-',
1508                                 device->raid_bypass_enabled ? '+' : '-',
1509                                 pqi_raid_level_to_string(device->raid_level));
1510         } else {
1511                 count += snprintf(buffer + count,
1512                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1513                         "AIO%c", device->aio_enabled ? '+' : '-');
1514                 if (device->devtype == TYPE_DISK ||
1515                         device->devtype == TYPE_ZBC)
1516                         count += snprintf(buffer + count,
1517                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1518                                 " qd=%-6d", device->queue_depth);
1519         }
1520
1521         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1522 }
1523
1524 /* Assumes the SCSI device list lock is held. */
1525
1526 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1527         struct pqi_scsi_dev *new_device)
1528 {
1529         existing_device->devtype = new_device->devtype;
1530         existing_device->device_type = new_device->device_type;
1531         existing_device->bus = new_device->bus;
1532         if (new_device->target_lun_valid) {
1533                 existing_device->target = new_device->target;
1534                 existing_device->lun = new_device->lun;
1535                 existing_device->target_lun_valid = true;
1536         }
1537
1538         /* By definition, the scsi3addr and wwid fields are already the same. */
1539
1540         existing_device->is_physical_device = new_device->is_physical_device;
1541         existing_device->is_external_raid_device =
1542                 new_device->is_external_raid_device;
1543         existing_device->aio_enabled = new_device->aio_enabled;
1544         memcpy(existing_device->vendor, new_device->vendor,
1545                 sizeof(existing_device->vendor));
1546         memcpy(existing_device->model, new_device->model,
1547                 sizeof(existing_device->model));
1548         existing_device->sas_address = new_device->sas_address;
1549         existing_device->raid_level = new_device->raid_level;
1550         existing_device->queue_depth = new_device->queue_depth;
1551         existing_device->aio_handle = new_device->aio_handle;
1552         existing_device->volume_status = new_device->volume_status;
1553         existing_device->active_path_index = new_device->active_path_index;
1554         existing_device->path_map = new_device->path_map;
1555         existing_device->bay = new_device->bay;
1556         memcpy(existing_device->box, new_device->box,
1557                 sizeof(existing_device->box));
1558         memcpy(existing_device->phys_connector, new_device->phys_connector,
1559                 sizeof(existing_device->phys_connector));
1560         existing_device->offload_to_mirror = 0;
1561         kfree(existing_device->raid_map);
1562         existing_device->raid_map = new_device->raid_map;
1563         existing_device->raid_bypass_configured =
1564                 new_device->raid_bypass_configured;
1565         existing_device->raid_bypass_enabled =
1566                 new_device->raid_bypass_enabled;
1567
1568         /* To prevent this from being freed later. */
1569         new_device->raid_map = NULL;
1570 }
1571
1572 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1573 {
1574         if (device) {
1575                 kfree(device->raid_map);
1576                 kfree(device);
1577         }
1578 }
1579
1580 /*
1581  * Called when exposing a new device to the OS fails in order to re-adjust
1582  * our internal SCSI device list to match the SCSI ML's view.
1583  */
1584
1585 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1586         struct pqi_scsi_dev *device)
1587 {
1588         unsigned long flags;
1589
1590         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1591         list_del(&device->scsi_device_list_entry);
1592         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1593
1594         /* Allow the device structure to be freed later. */
1595         device->keep_device = false;
1596 }
1597
1598 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1599         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1600 {
1601         int rc;
1602         unsigned int i;
1603         unsigned long flags;
1604         enum pqi_find_result find_result;
1605         struct pqi_scsi_dev *device;
1606         struct pqi_scsi_dev *next;
1607         struct pqi_scsi_dev *matching_device;
1608         LIST_HEAD(add_list);
1609         LIST_HEAD(delete_list);
1610
1611         /*
1612          * The idea here is to do as little work as possible while holding the
1613          * spinlock.  That's why we go to great pains to defer anything other
1614          * than updating the internal device list until after we release the
1615          * spinlock.
1616          */
1617
1618         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1619
1620         /* Assume that all devices in the existing list have gone away. */
1621         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1622                 scsi_device_list_entry)
1623                 device->device_gone = true;
1624
1625         for (i = 0; i < num_new_devices; i++) {
1626                 device = new_device_list[i];
1627
1628                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1629                                                 &matching_device);
1630
1631                 switch (find_result) {
1632                 case DEVICE_SAME:
1633                         /*
1634                          * The newly found device is already in the existing
1635                          * device list.
1636                          */
1637                         device->new_device = false;
1638                         matching_device->device_gone = false;
1639                         pqi_scsi_update_device(matching_device, device);
1640                         break;
1641                 case DEVICE_NOT_FOUND:
1642                         /*
1643                          * The newly found device is NOT in the existing device
1644                          * list.
1645                          */
1646                         device->new_device = true;
1647                         break;
1648                 case DEVICE_CHANGED:
1649                         /*
1650                          * The original device has gone away and we need to add
1651                          * the new device.
1652                          */
1653                         device->new_device = true;
1654                         break;
1655                 }
1656         }
1657
1658         /* Process all devices that have gone away. */
1659         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1660                 scsi_device_list_entry) {
1661                 if (device->device_gone) {
1662                         list_del(&device->scsi_device_list_entry);
1663                         list_add_tail(&device->delete_list_entry, &delete_list);
1664                 }
1665         }
1666
1667         /* Process all new devices. */
1668         for (i = 0; i < num_new_devices; i++) {
1669                 device = new_device_list[i];
1670                 if (!device->new_device)
1671                         continue;
1672                 if (device->volume_offline)
1673                         continue;
1674                 list_add_tail(&device->scsi_device_list_entry,
1675                         &ctrl_info->scsi_device_list);
1676                 list_add_tail(&device->add_list_entry, &add_list);
1677                 /* To prevent this device structure from being freed later. */
1678                 device->keep_device = true;
1679         }
1680
1681         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1682
1683         /* Remove all devices that have gone away. */
1684         list_for_each_entry_safe(device, next, &delete_list,
1685                 delete_list_entry) {
1686                 if (device->volume_offline) {
1687                         pqi_dev_info(ctrl_info, "offline", device);
1688                         pqi_show_volume_status(ctrl_info, device);
1689                 } else {
1690                         pqi_dev_info(ctrl_info, "removed", device);
1691                 }
1692                 if (device->sdev)
1693                         pqi_remove_device(ctrl_info, device);
1694                 list_del(&device->delete_list_entry);
1695                 pqi_free_device(device);
1696         }
1697
1698         /*
1699          * Notify the SCSI ML if the queue depth of any existing device has
1700          * changed.
1701          */
1702         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1703                 scsi_device_list_entry) {
1704                 if (device->sdev && device->queue_depth !=
1705                         device->advertised_queue_depth) {
1706                         device->advertised_queue_depth = device->queue_depth;
1707                         scsi_change_queue_depth(device->sdev,
1708                                 device->advertised_queue_depth);
1709                 }
1710         }
1711
1712         /* Expose any new devices. */
1713         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1714                 if (!device->sdev) {
1715                         pqi_dev_info(ctrl_info, "added", device);
1716                         rc = pqi_add_device(ctrl_info, device);
1717                         if (rc) {
1718                                 dev_warn(&ctrl_info->pci_dev->dev,
1719                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
1720                                         ctrl_info->scsi_host->host_no,
1721                                         device->bus, device->target,
1722                                         device->lun);
1723                                 pqi_fixup_botched_add(ctrl_info, device);
1724                         }
1725                 }
1726         }
1727 }
1728
1729 static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1730 {
1731         bool is_supported = false;
1732
1733         switch (device->devtype) {
1734         case TYPE_DISK:
1735         case TYPE_ZBC:
1736         case TYPE_TAPE:
1737         case TYPE_MEDIUM_CHANGER:
1738         case TYPE_ENCLOSURE:
1739                 is_supported = true;
1740                 break;
1741         case TYPE_RAID:
1742                 /*
1743                  * Only support the HBA controller itself as a RAID
1744                  * controller.  If it's a RAID controller other than
1745                  * the HBA itself (an external RAID controller, for
1746                  * example), we don't support it.
1747                  */
1748                 if (pqi_is_hba_lunid(device->scsi3addr))
1749                         is_supported = true;
1750                 break;
1751         }
1752
1753         return is_supported;
1754 }
1755
1756 static inline bool pqi_skip_device(u8 *scsi3addr)
1757 {
1758         /* Ignore all masked devices. */
1759         if (MASKED_DEVICE(scsi3addr))
1760                 return true;
1761
1762         return false;
1763 }
1764
1765 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1766 {
1767         int i;
1768         int rc;
1769         LIST_HEAD(new_device_list_head);
1770         struct report_phys_lun_extended *physdev_list = NULL;
1771         struct report_log_lun_extended *logdev_list = NULL;
1772         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1773         struct report_log_lun_extended_entry *log_lun_ext_entry;
1774         struct bmic_identify_physical_device *id_phys = NULL;
1775         u32 num_physicals;
1776         u32 num_logicals;
1777         struct pqi_scsi_dev **new_device_list = NULL;
1778         struct pqi_scsi_dev *device;
1779         struct pqi_scsi_dev *next;
1780         unsigned int num_new_devices;
1781         unsigned int num_valid_devices;
1782         bool is_physical_device;
1783         u8 *scsi3addr;
1784         static char *out_of_memory_msg =
1785                 "failed to allocate memory, device discovery stopped";
1786
1787         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
1788         if (rc)
1789                 goto out;
1790
1791         if (physdev_list)
1792                 num_physicals =
1793                         get_unaligned_be32(&physdev_list->header.list_length)
1794                                 / sizeof(physdev_list->lun_entries[0]);
1795         else
1796                 num_physicals = 0;
1797
1798         if (logdev_list)
1799                 num_logicals =
1800                         get_unaligned_be32(&logdev_list->header.list_length)
1801                                 / sizeof(logdev_list->lun_entries[0]);
1802         else
1803                 num_logicals = 0;
1804
1805         if (num_physicals) {
1806                 /*
1807                  * We need this buffer for calls to pqi_get_physical_disk_info()
1808                  * below.  We allocate it here instead of inside
1809                  * pqi_get_physical_disk_info() because it's a fairly large
1810                  * buffer.
1811                  */
1812                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
1813                 if (!id_phys) {
1814                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1815                                 out_of_memory_msg);
1816                         rc = -ENOMEM;
1817                         goto out;
1818                 }
1819         }
1820
1821         num_new_devices = num_physicals + num_logicals;
1822
1823         new_device_list = kmalloc(sizeof(*new_device_list) *
1824                 num_new_devices, GFP_KERNEL);
1825         if (!new_device_list) {
1826                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
1827                 rc = -ENOMEM;
1828                 goto out;
1829         }
1830
1831         for (i = 0; i < num_new_devices; i++) {
1832                 device = kzalloc(sizeof(*device), GFP_KERNEL);
1833                 if (!device) {
1834                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1835                                 out_of_memory_msg);
1836                         rc = -ENOMEM;
1837                         goto out;
1838                 }
1839                 list_add_tail(&device->new_device_list_entry,
1840                         &new_device_list_head);
1841         }
1842
1843         device = NULL;
1844         num_valid_devices = 0;
1845
1846         for (i = 0; i < num_new_devices; i++) {
1847
1848                 if (i < num_physicals) {
1849                         is_physical_device = true;
1850                         phys_lun_ext_entry = &physdev_list->lun_entries[i];
1851                         log_lun_ext_entry = NULL;
1852                         scsi3addr = phys_lun_ext_entry->lunid;
1853                 } else {
1854                         is_physical_device = false;
1855                         phys_lun_ext_entry = NULL;
1856                         log_lun_ext_entry =
1857                                 &logdev_list->lun_entries[i - num_physicals];
1858                         scsi3addr = log_lun_ext_entry->lunid;
1859                 }
1860
1861                 if (is_physical_device && pqi_skip_device(scsi3addr))
1862                         continue;
1863
1864                 if (device)
1865                         device = list_next_entry(device, new_device_list_entry);
1866                 else
1867                         device = list_first_entry(&new_device_list_head,
1868                                 struct pqi_scsi_dev, new_device_list_entry);
1869
1870                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1871                 device->is_physical_device = is_physical_device;
1872                 if (!is_physical_device)
1873                         device->is_external_raid_device =
1874                                 pqi_is_external_raid_addr(scsi3addr);
1875
1876                 /* Gather information about the device. */
1877                 rc = pqi_get_device_info(ctrl_info, device);
1878                 if (rc == -ENOMEM) {
1879                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1880                                 out_of_memory_msg);
1881                         goto out;
1882                 }
1883                 if (rc) {
1884                         if (device->is_physical_device)
1885                                 dev_warn(&ctrl_info->pci_dev->dev,
1886                                         "obtaining device info failed, skipping physical device %016llx\n",
1887                                         get_unaligned_be64(
1888                                                 &phys_lun_ext_entry->wwid));
1889                         else
1890                                 dev_warn(&ctrl_info->pci_dev->dev,
1891                                         "obtaining device info failed, skipping logical device %08x%08x\n",
1892                                         *((u32 *)&device->scsi3addr),
1893                                         *((u32 *)&device->scsi3addr[4]));
1894                         rc = 0;
1895                         continue;
1896                 }
1897
1898                 if (!pqi_is_supported_device(device))
1899                         continue;
1900
1901                 pqi_assign_bus_target_lun(device);
1902
1903                 if (device->is_physical_device) {
1904                         device->wwid = phys_lun_ext_entry->wwid;
1905                         if ((phys_lun_ext_entry->device_flags &
1906                                 REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
1907                                 phys_lun_ext_entry->aio_handle)
1908                                 device->aio_enabled = true;
1909                 } else {
1910                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
1911                                 sizeof(device->volume_id));
1912                 }
1913
1914                 switch (device->devtype) {
1915                 case TYPE_DISK:
1916                 case TYPE_ZBC:
1917                 case TYPE_ENCLOSURE:
1918                         if (device->is_physical_device) {
1919                                 device->sas_address =
1920                                         get_unaligned_be64(&device->wwid);
1921                                 if (device->devtype == TYPE_DISK ||
1922                                         device->devtype == TYPE_ZBC) {
1923                                         device->aio_handle =
1924                                                 phys_lun_ext_entry->aio_handle;
1925                                         pqi_get_physical_disk_info(ctrl_info,
1926                                                 device, id_phys);
1927                                 }
1928                         }
1929                         break;
1930                 }
1931
1932                 new_device_list[num_valid_devices++] = device;
1933         }
1934
1935         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
1936
1937 out:
1938         list_for_each_entry_safe(device, next, &new_device_list_head,
1939                 new_device_list_entry) {
1940                 if (device->keep_device)
1941                         continue;
1942                 list_del(&device->new_device_list_entry);
1943                 pqi_free_device(device);
1944         }
1945
1946         kfree(new_device_list);
1947         kfree(physdev_list);
1948         kfree(logdev_list);
1949         kfree(id_phys);
1950
1951         return rc;
1952 }
1953
1954 static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1955 {
1956         unsigned long flags;
1957         struct pqi_scsi_dev *device;
1958
1959         while (1) {
1960                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1961
1962                 device = list_first_entry_or_null(&ctrl_info->scsi_device_list,
1963                         struct pqi_scsi_dev, scsi_device_list_entry);
1964                 if (device)
1965                         list_del(&device->scsi_device_list_entry);
1966
1967                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
1968                         flags);
1969
1970                 if (!device)
1971                         break;
1972
1973                 if (device->sdev)
1974                         pqi_remove_device(ctrl_info, device);
1975                 pqi_free_device(device);
1976         }
1977 }
1978
1979 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1980 {
1981         int rc;
1982
1983         if (pqi_ctrl_offline(ctrl_info))
1984                 return -ENXIO;
1985
1986         mutex_lock(&ctrl_info->scan_mutex);
1987
1988         rc = pqi_update_scsi_devices(ctrl_info);
1989         if (rc)
1990                 pqi_schedule_rescan_worker_delayed(ctrl_info);
1991
1992         mutex_unlock(&ctrl_info->scan_mutex);
1993
1994         return rc;
1995 }
1996
1997 static void pqi_scan_start(struct Scsi_Host *shost)
1998 {
1999         pqi_scan_scsi_devices(shost_to_hba(shost));
2000 }
2001
2002 /* Returns TRUE if scan is finished. */
2003
2004 static int pqi_scan_finished(struct Scsi_Host *shost,
2005         unsigned long elapsed_time)
2006 {
2007         struct pqi_ctrl_info *ctrl_info;
2008
2009         ctrl_info = shost_priv(shost);
2010
2011         return !mutex_is_locked(&ctrl_info->scan_mutex);
2012 }
2013
2014 static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
2015 {
2016         mutex_lock(&ctrl_info->scan_mutex);
2017         mutex_unlock(&ctrl_info->scan_mutex);
2018 }
2019
2020 static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
2021 {
2022         mutex_lock(&ctrl_info->lun_reset_mutex);
2023         mutex_unlock(&ctrl_info->lun_reset_mutex);
2024 }
2025
2026 static inline void pqi_set_encryption_info(
2027         struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
2028         u64 first_block)
2029 {
2030         u32 volume_blk_size;
2031
2032         /*
2033          * Set the encryption tweak values based on logical block address.
2034          * If the block size is 512, the tweak value is equal to the LBA.
2035          * For other block sizes, tweak value is (LBA * block size) / 512.
2036          */
2037         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2038         if (volume_blk_size != 512)
2039                 first_block = (first_block * volume_blk_size) / 512;
2040
2041         encryption_info->data_encryption_key_index =
2042                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2043         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2044         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2045 }
2046
2047 /*
2048  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2049  */
2050
2051 #define PQI_RAID_BYPASS_INELIGIBLE      1
2052
2053 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2054         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2055         struct pqi_queue_group *queue_group)
2056 {
2057         struct raid_map *raid_map;
2058         bool is_write = false;
2059         u32 map_index;
2060         u64 first_block;
2061         u64 last_block;
2062         u32 block_cnt;
2063         u32 blocks_per_row;
2064         u64 first_row;
2065         u64 last_row;
2066         u32 first_row_offset;
2067         u32 last_row_offset;
2068         u32 first_column;
2069         u32 last_column;
2070         u64 r0_first_row;
2071         u64 r0_last_row;
2072         u32 r5or6_blocks_per_row;
2073         u64 r5or6_first_row;
2074         u64 r5or6_last_row;
2075         u32 r5or6_first_row_offset;
2076         u32 r5or6_last_row_offset;
2077         u32 r5or6_first_column;
2078         u32 r5or6_last_column;
2079         u16 data_disks_per_row;
2080         u32 total_disks_per_row;
2081         u16 layout_map_count;
2082         u32 stripesize;
2083         u16 strip_size;
2084         u32 first_group;
2085         u32 last_group;
2086         u32 current_group;
2087         u32 map_row;
2088         u32 aio_handle;
2089         u64 disk_block;
2090         u32 disk_block_cnt;
2091         u8 cdb[16];
2092         u8 cdb_length;
2093         int offload_to_mirror;
2094         struct pqi_encryption_info *encryption_info_ptr;
2095         struct pqi_encryption_info encryption_info;
2096 #if BITS_PER_LONG == 32
2097         u64 tmpdiv;
2098 #endif
2099
2100         /* Check for valid opcode, get LBA and block count. */
2101         switch (scmd->cmnd[0]) {
2102         case WRITE_6:
2103                 is_write = true;
2104                 /* fall through */
2105         case READ_6:
2106                 first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2107                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2108                 block_cnt = (u32)scmd->cmnd[4];
2109                 if (block_cnt == 0)
2110                         block_cnt = 256;
2111                 break;
2112         case WRITE_10:
2113                 is_write = true;
2114                 /* fall through */
2115         case READ_10:
2116                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2117                 block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2118                 break;
2119         case WRITE_12:
2120                 is_write = true;
2121                 /* fall through */
2122         case READ_12:
2123                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2124                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2125                 break;
2126         case WRITE_16:
2127                 is_write = true;
2128                 /* fall through */
2129         case READ_16:
2130                 first_block = get_unaligned_be64(&scmd->cmnd[2]);
2131                 block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2132                 break;
2133         default:
2134                 /* Process via normal I/O path. */
2135                 return PQI_RAID_BYPASS_INELIGIBLE;
2136         }
2137
2138         /* Check for write to non-RAID-0. */
2139         if (is_write && device->raid_level != SA_RAID_0)
2140                 return PQI_RAID_BYPASS_INELIGIBLE;
2141
2142         if (unlikely(block_cnt == 0))
2143                 return PQI_RAID_BYPASS_INELIGIBLE;
2144
2145         last_block = first_block + block_cnt - 1;
2146         raid_map = device->raid_map;
2147
2148         /* Check for invalid block or wraparound. */
2149         if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2150                 last_block < first_block)
2151                 return PQI_RAID_BYPASS_INELIGIBLE;
2152
2153         data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2154         strip_size = get_unaligned_le16(&raid_map->strip_size);
2155         layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2156
2157         /* Calculate stripe information for the request. */
2158         blocks_per_row = data_disks_per_row * strip_size;
2159 #if BITS_PER_LONG == 32
2160         tmpdiv = first_block;
2161         do_div(tmpdiv, blocks_per_row);
2162         first_row = tmpdiv;
2163         tmpdiv = last_block;
2164         do_div(tmpdiv, blocks_per_row);
2165         last_row = tmpdiv;
2166         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2167         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2168         tmpdiv = first_row_offset;
2169         do_div(tmpdiv, strip_size);
2170         first_column = tmpdiv;
2171         tmpdiv = last_row_offset;
2172         do_div(tmpdiv, strip_size);
2173         last_column = tmpdiv;
2174 #else
2175         first_row = first_block / blocks_per_row;
2176         last_row = last_block / blocks_per_row;
2177         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2178         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2179         first_column = first_row_offset / strip_size;
2180         last_column = last_row_offset / strip_size;
2181 #endif
2182
2183         /* If this isn't a single row/column then give to the controller. */
2184         if (first_row != last_row || first_column != last_column)
2185                 return PQI_RAID_BYPASS_INELIGIBLE;
2186
2187         /* Proceeding with driver mapping. */
2188         total_disks_per_row = data_disks_per_row +
2189                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2190         map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2191                 get_unaligned_le16(&raid_map->row_cnt);
2192         map_index = (map_row * total_disks_per_row) + first_column;
2193
2194         /* RAID 1 */
2195         if (device->raid_level == SA_RAID_1) {
2196                 if (device->offload_to_mirror)
2197                         map_index += data_disks_per_row;
2198                 device->offload_to_mirror = !device->offload_to_mirror;
2199         } else if (device->raid_level == SA_RAID_ADM) {
2200                 /* RAID ADM */
2201                 /*
2202                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2203                  * divisible by 3.
2204                  */
2205                 offload_to_mirror = device->offload_to_mirror;
2206                 if (offload_to_mirror == 0)  {
2207                         /* use physical disk in the first mirrored group. */
2208                         map_index %= data_disks_per_row;
2209                 } else {
2210                         do {
2211                                 /*
2212                                  * Determine mirror group that map_index
2213                                  * indicates.
2214                                  */
2215                                 current_group = map_index / data_disks_per_row;
2216
2217                                 if (offload_to_mirror != current_group) {
2218                                         if (current_group <
2219                                                 layout_map_count - 1) {
2220                                                 /*
2221                                                  * Select raid index from
2222                                                  * next group.
2223                                                  */
2224                                                 map_index += data_disks_per_row;
2225                                                 current_group++;
2226                                         } else {
2227                                                 /*
2228                                                  * Select raid index from first
2229                                                  * group.
2230                                                  */
2231                                                 map_index %= data_disks_per_row;
2232                                                 current_group = 0;
2233                                         }
2234                                 }
2235                         } while (offload_to_mirror != current_group);
2236                 }
2237
2238                 /* Set mirror group to use next time. */
2239                 offload_to_mirror =
2240                         (offload_to_mirror >= layout_map_count - 1) ?
2241                                 0 : offload_to_mirror + 1;
2242                 WARN_ON(offload_to_mirror >= layout_map_count);
2243                 device->offload_to_mirror = offload_to_mirror;
2244                 /*
2245                  * Avoid direct use of device->offload_to_mirror within this
2246                  * function since multiple threads might simultaneously
2247                  * increment it beyond the range of device->layout_map_count -1.
2248                  */
2249         } else if ((device->raid_level == SA_RAID_5 ||
2250                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2251                 /* RAID 50/60 */
2252                 /* Verify first and last block are in same RAID group */
2253                 r5or6_blocks_per_row = strip_size * data_disks_per_row;
2254                 stripesize = r5or6_blocks_per_row * layout_map_count;
2255 #if BITS_PER_LONG == 32
2256                 tmpdiv = first_block;
2257                 first_group = do_div(tmpdiv, stripesize);
2258                 tmpdiv = first_group;
2259                 do_div(tmpdiv, r5or6_blocks_per_row);
2260                 first_group = tmpdiv;
2261                 tmpdiv = last_block;
2262                 last_group = do_div(tmpdiv, stripesize);
2263                 tmpdiv = last_group;
2264                 do_div(tmpdiv, r5or6_blocks_per_row);
2265                 last_group = tmpdiv;
2266 #else
2267                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2268                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2269 #endif
2270                 if (first_group != last_group)
2271                         return PQI_RAID_BYPASS_INELIGIBLE;
2272
2273                 /* Verify request is in a single row of RAID 5/6 */
2274 #if BITS_PER_LONG == 32
2275                 tmpdiv = first_block;
2276                 do_div(tmpdiv, stripesize);
2277                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
2278                 tmpdiv = last_block;
2279                 do_div(tmpdiv, stripesize);
2280                 r5or6_last_row = r0_last_row = tmpdiv;
2281 #else
2282                 first_row = r5or6_first_row = r0_first_row =
2283                         first_block / stripesize;
2284                 r5or6_last_row = r0_last_row = last_block / stripesize;
2285 #endif
2286                 if (r5or6_first_row != r5or6_last_row)
2287                         return PQI_RAID_BYPASS_INELIGIBLE;
2288
2289                 /* Verify request is in a single column */
2290 #if BITS_PER_LONG == 32
2291                 tmpdiv = first_block;
2292                 first_row_offset = do_div(tmpdiv, stripesize);
2293                 tmpdiv = first_row_offset;
2294                 first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2295                 r5or6_first_row_offset = first_row_offset;
2296                 tmpdiv = last_block;
2297                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2298                 tmpdiv = r5or6_last_row_offset;
2299                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2300                 tmpdiv = r5or6_first_row_offset;
2301                 do_div(tmpdiv, strip_size);
2302                 first_column = r5or6_first_column = tmpdiv;
2303                 tmpdiv = r5or6_last_row_offset;
2304                 do_div(tmpdiv, strip_size);
2305                 r5or6_last_column = tmpdiv;
2306 #else
2307                 first_row_offset = r5or6_first_row_offset =
2308                         (u32)((first_block % stripesize) %
2309                         r5or6_blocks_per_row);
2310
2311                 r5or6_last_row_offset =
2312                         (u32)((last_block % stripesize) %
2313                         r5or6_blocks_per_row);
2314
2315                 first_column = r5or6_first_row_offset / strip_size;
2316                 r5or6_first_column = first_column;
2317                 r5or6_last_column = r5or6_last_row_offset / strip_size;
2318 #endif
2319                 if (r5or6_first_column != r5or6_last_column)
2320                         return PQI_RAID_BYPASS_INELIGIBLE;
2321
2322                 /* Request is eligible */
2323                 map_row =
2324                         ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2325                         get_unaligned_le16(&raid_map->row_cnt);
2326
2327                 map_index = (first_group *
2328                         (get_unaligned_le16(&raid_map->row_cnt) *
2329                         total_disks_per_row)) +
2330                         (map_row * total_disks_per_row) + first_column;
2331         }
2332
2333         if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
2334                 return PQI_RAID_BYPASS_INELIGIBLE;
2335
2336         aio_handle = raid_map->disk_data[map_index].aio_handle;
2337         disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2338                 first_row * strip_size +
2339                 (first_row_offset - first_column * strip_size);
2340         disk_block_cnt = block_cnt;
2341
2342         /* Handle differing logical/physical block sizes. */
2343         if (raid_map->phys_blk_shift) {
2344                 disk_block <<= raid_map->phys_blk_shift;
2345                 disk_block_cnt <<= raid_map->phys_blk_shift;
2346         }
2347
2348         if (unlikely(disk_block_cnt > 0xffff))
2349                 return PQI_RAID_BYPASS_INELIGIBLE;
2350
2351         /* Build the new CDB for the physical disk I/O. */
2352         if (disk_block > 0xffffffff) {
2353                 cdb[0] = is_write ? WRITE_16 : READ_16;
2354                 cdb[1] = 0;
2355                 put_unaligned_be64(disk_block, &cdb[2]);
2356                 put_unaligned_be32(disk_block_cnt, &cdb[10]);
2357                 cdb[14] = 0;
2358                 cdb[15] = 0;
2359                 cdb_length = 16;
2360         } else {
2361                 cdb[0] = is_write ? WRITE_10 : READ_10;
2362                 cdb[1] = 0;
2363                 put_unaligned_be32((u32)disk_block, &cdb[2]);
2364                 cdb[6] = 0;
2365                 put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2366                 cdb[9] = 0;
2367                 cdb_length = 10;
2368         }
2369
2370         if (get_unaligned_le16(&raid_map->flags) &
2371                 RAID_MAP_ENCRYPTION_ENABLED) {
2372                 pqi_set_encryption_info(&encryption_info, raid_map,
2373                         first_block);
2374                 encryption_info_ptr = &encryption_info;
2375         } else {
2376                 encryption_info_ptr = NULL;
2377         }
2378
2379         return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2380                 cdb, cdb_length, queue_group, encryption_info_ptr, true);
2381 }
2382
2383 #define PQI_STATUS_IDLE         0x0
2384
2385 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2386 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2387
2388 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2389 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2390 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2391 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2392 #define PQI_DEVICE_STATE_ERROR                          0x4
2393
2394 #define PQI_MODE_READY_TIMEOUT_SECS             30
2395 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2396
2397 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2398 {
2399         struct pqi_device_registers __iomem *pqi_registers;
2400         unsigned long timeout;
2401         u64 signature;
2402         u8 status;
2403
2404         pqi_registers = ctrl_info->pqi_registers;
2405         timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
2406
2407         while (1) {
2408                 signature = readq(&pqi_registers->signature);
2409                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2410                         sizeof(signature)) == 0)
2411                         break;
2412                 if (time_after(jiffies, timeout)) {
2413                         dev_err(&ctrl_info->pci_dev->dev,
2414                                 "timed out waiting for PQI signature\n");
2415                         return -ETIMEDOUT;
2416                 }
2417                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2418         }
2419
2420         while (1) {
2421                 status = readb(&pqi_registers->function_and_status_code);
2422                 if (status == PQI_STATUS_IDLE)
2423                         break;
2424                 if (time_after(jiffies, timeout)) {
2425                         dev_err(&ctrl_info->pci_dev->dev,
2426                                 "timed out waiting for PQI IDLE\n");
2427                         return -ETIMEDOUT;
2428                 }
2429                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2430         }
2431
2432         while (1) {
2433                 if (readl(&pqi_registers->device_status) ==
2434                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2435                         break;
2436                 if (time_after(jiffies, timeout)) {
2437                         dev_err(&ctrl_info->pci_dev->dev,
2438                                 "timed out waiting for PQI all registers ready\n");
2439                         return -ETIMEDOUT;
2440                 }
2441                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2442         }
2443
2444         return 0;
2445 }
2446
2447 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2448 {
2449         struct pqi_scsi_dev *device;
2450
2451         device = io_request->scmd->device->hostdata;
2452         device->raid_bypass_enabled = false;
2453         device->aio_enabled = false;
2454 }
2455
2456 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2457 {
2458         struct pqi_ctrl_info *ctrl_info;
2459         struct pqi_scsi_dev *device;
2460
2461         device = sdev->hostdata;
2462         if (device->device_offline)
2463                 return;
2464
2465         device->device_offline = true;
2466         scsi_device_set_state(sdev, SDEV_OFFLINE);
2467         ctrl_info = shost_to_hba(sdev->host);
2468         pqi_schedule_rescan_worker(ctrl_info);
2469         dev_err(&ctrl_info->pci_dev->dev, "offlined %s scsi %d:%d:%d:%d\n",
2470                 path, ctrl_info->scsi_host->host_no, device->bus,
2471                 device->target, device->lun);
2472 }
2473
2474 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2475 {
2476         u8 scsi_status;
2477         u8 host_byte;
2478         struct scsi_cmnd *scmd;
2479         struct pqi_raid_error_info *error_info;
2480         size_t sense_data_length;
2481         int residual_count;
2482         int xfer_count;
2483         struct scsi_sense_hdr sshdr;
2484
2485         scmd = io_request->scmd;
2486         if (!scmd)
2487                 return;
2488
2489         error_info = io_request->error_info;
2490         scsi_status = error_info->status;
2491         host_byte = DID_OK;
2492
2493         switch (error_info->data_out_result) {
2494         case PQI_DATA_IN_OUT_GOOD:
2495                 break;
2496         case PQI_DATA_IN_OUT_UNDERFLOW:
2497                 xfer_count =
2498                         get_unaligned_le32(&error_info->data_out_transferred);
2499                 residual_count = scsi_bufflen(scmd) - xfer_count;
2500                 scsi_set_resid(scmd, residual_count);
2501                 if (xfer_count < scmd->underflow)
2502                         host_byte = DID_SOFT_ERROR;
2503                 break;
2504         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2505         case PQI_DATA_IN_OUT_ABORTED:
2506                 host_byte = DID_ABORT;
2507                 break;
2508         case PQI_DATA_IN_OUT_TIMEOUT:
2509                 host_byte = DID_TIME_OUT;
2510                 break;
2511         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2512         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2513         case PQI_DATA_IN_OUT_BUFFER_ERROR:
2514         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2515         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2516         case PQI_DATA_IN_OUT_ERROR:
2517         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2518         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2519         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2520         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2521         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2522         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2523         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2524         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2525         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2526         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2527         default:
2528                 host_byte = DID_ERROR;
2529                 break;
2530         }
2531
2532         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2533         if (sense_data_length == 0)
2534                 sense_data_length =
2535                         get_unaligned_le16(&error_info->response_data_length);
2536         if (sense_data_length) {
2537                 if (sense_data_length > sizeof(error_info->data))
2538                         sense_data_length = sizeof(error_info->data);
2539
2540                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2541                         scsi_normalize_sense(error_info->data,
2542                                 sense_data_length, &sshdr) &&
2543                                 sshdr.sense_key == HARDWARE_ERROR &&
2544                                 sshdr.asc == 0x3e &&
2545                                 sshdr.ascq == 0x1) {
2546                         pqi_take_device_offline(scmd->device, "RAID");
2547                         host_byte = DID_NO_CONNECT;
2548                 }
2549
2550                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2551                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
2552                 memcpy(scmd->sense_buffer, error_info->data,
2553                         sense_data_length);
2554         }
2555
2556         scmd->result = scsi_status;
2557         set_host_byte(scmd, host_byte);
2558 }
2559
2560 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2561 {
2562         u8 scsi_status;
2563         u8 host_byte;
2564         struct scsi_cmnd *scmd;
2565         struct pqi_aio_error_info *error_info;
2566         size_t sense_data_length;
2567         int residual_count;
2568         int xfer_count;
2569         bool device_offline;
2570
2571         scmd = io_request->scmd;
2572         error_info = io_request->error_info;
2573         host_byte = DID_OK;
2574         sense_data_length = 0;
2575         device_offline = false;
2576
2577         switch (error_info->service_response) {
2578         case PQI_AIO_SERV_RESPONSE_COMPLETE:
2579                 scsi_status = error_info->status;
2580                 break;
2581         case PQI_AIO_SERV_RESPONSE_FAILURE:
2582                 switch (error_info->status) {
2583                 case PQI_AIO_STATUS_IO_ABORTED:
2584                         scsi_status = SAM_STAT_TASK_ABORTED;
2585                         break;
2586                 case PQI_AIO_STATUS_UNDERRUN:
2587                         scsi_status = SAM_STAT_GOOD;
2588                         residual_count = get_unaligned_le32(
2589                                                 &error_info->residual_count);
2590                         scsi_set_resid(scmd, residual_count);
2591                         xfer_count = scsi_bufflen(scmd) - residual_count;
2592                         if (xfer_count < scmd->underflow)
2593                                 host_byte = DID_SOFT_ERROR;
2594                         break;
2595                 case PQI_AIO_STATUS_OVERRUN:
2596                         scsi_status = SAM_STAT_GOOD;
2597                         break;
2598                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2599                         pqi_aio_path_disabled(io_request);
2600                         scsi_status = SAM_STAT_GOOD;
2601                         io_request->status = -EAGAIN;
2602                         break;
2603                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2604                 case PQI_AIO_STATUS_INVALID_DEVICE:
2605                         if (!io_request->raid_bypass) {
2606                                 device_offline = true;
2607                                 pqi_take_device_offline(scmd->device, "AIO");
2608                                 host_byte = DID_NO_CONNECT;
2609                         }
2610                         scsi_status = SAM_STAT_CHECK_CONDITION;
2611                         break;
2612                 case PQI_AIO_STATUS_IO_ERROR:
2613                 default:
2614                         scsi_status = SAM_STAT_CHECK_CONDITION;
2615                         break;
2616                 }
2617                 break;
2618         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2619         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2620                 scsi_status = SAM_STAT_GOOD;
2621                 break;
2622         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2623         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2624         default:
2625                 scsi_status = SAM_STAT_CHECK_CONDITION;
2626                 break;
2627         }
2628
2629         if (error_info->data_present) {
2630                 sense_data_length =
2631                         get_unaligned_le16(&error_info->data_length);
2632                 if (sense_data_length) {
2633                         if (sense_data_length > sizeof(error_info->data))
2634                                 sense_data_length = sizeof(error_info->data);
2635                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2636                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
2637                         memcpy(scmd->sense_buffer, error_info->data,
2638                                 sense_data_length);
2639                 }
2640         }
2641
2642         if (device_offline && sense_data_length == 0)
2643                 scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2644                         0x3e, 0x1);
2645
2646         scmd->result = scsi_status;
2647         set_host_byte(scmd, host_byte);
2648 }
2649
2650 static void pqi_process_io_error(unsigned int iu_type,
2651         struct pqi_io_request *io_request)
2652 {
2653         switch (iu_type) {
2654         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2655                 pqi_process_raid_io_error(io_request);
2656                 break;
2657         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2658                 pqi_process_aio_io_error(io_request);
2659                 break;
2660         }
2661 }
2662
2663 static int pqi_interpret_task_management_response(
2664         struct pqi_task_management_response *response)
2665 {
2666         int rc;
2667
2668         switch (response->response_code) {
2669         case SOP_TMF_COMPLETE:
2670         case SOP_TMF_FUNCTION_SUCCEEDED:
2671                 rc = 0;
2672                 break;
2673         default:
2674                 rc = -EIO;
2675                 break;
2676         }
2677
2678         return rc;
2679 }
2680
2681 static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
2682         struct pqi_queue_group *queue_group)
2683 {
2684         unsigned int num_responses;
2685         pqi_index_t oq_pi;
2686         pqi_index_t oq_ci;
2687         struct pqi_io_request *io_request;
2688         struct pqi_io_response *response;
2689         u16 request_id;
2690
2691         num_responses = 0;
2692         oq_ci = queue_group->oq_ci_copy;
2693
2694         while (1) {
2695                 oq_pi = *queue_group->oq_pi;
2696                 if (oq_pi == oq_ci)
2697                         break;
2698
2699                 num_responses++;
2700                 response = queue_group->oq_element_array +
2701                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2702
2703                 request_id = get_unaligned_le16(&response->request_id);
2704                 WARN_ON(request_id >= ctrl_info->max_io_slots);
2705
2706                 io_request = &ctrl_info->io_request_pool[request_id];
2707                 WARN_ON(atomic_read(&io_request->refcount) == 0);
2708
2709                 switch (response->header.iu_type) {
2710                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2711                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2712                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2713                         break;
2714                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2715                         io_request->status =
2716                                 pqi_interpret_task_management_response(
2717                                         (void *)response);
2718                         break;
2719                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2720                         pqi_aio_path_disabled(io_request);
2721                         io_request->status = -EAGAIN;
2722                         break;
2723                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2724                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2725                         io_request->error_info = ctrl_info->error_buffer +
2726                                 (get_unaligned_le16(&response->error_index) *
2727                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2728                         pqi_process_io_error(response->header.iu_type,
2729                                 io_request);
2730                         break;
2731                 default:
2732                         dev_err(&ctrl_info->pci_dev->dev,
2733                                 "unexpected IU type: 0x%x\n",
2734                                 response->header.iu_type);
2735                         break;
2736                 }
2737
2738                 io_request->io_complete_callback(io_request,
2739                         io_request->context);
2740
2741                 /*
2742                  * Note that the I/O request structure CANNOT BE TOUCHED after
2743                  * returning from the I/O completion callback!
2744                  */
2745
2746                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2747         }
2748
2749         if (num_responses) {
2750                 queue_group->oq_ci_copy = oq_ci;
2751                 writel(oq_ci, queue_group->oq_ci);
2752         }
2753
2754         return num_responses;
2755 }
2756
2757 static inline unsigned int pqi_num_elements_free(unsigned int pi,
2758         unsigned int ci, unsigned int elements_in_queue)
2759 {
2760         unsigned int num_elements_used;
2761
2762         if (pi >= ci)
2763                 num_elements_used = pi - ci;
2764         else
2765                 num_elements_used = elements_in_queue - ci + pi;
2766
2767         return elements_in_queue - num_elements_used - 1;
2768 }
2769
2770 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
2771         struct pqi_event_acknowledge_request *iu, size_t iu_length)
2772 {
2773         pqi_index_t iq_pi;
2774         pqi_index_t iq_ci;
2775         unsigned long flags;
2776         void *next_element;
2777         struct pqi_queue_group *queue_group;
2778
2779         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
2780         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
2781
2782         while (1) {
2783                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
2784
2785                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
2786                 iq_ci = *queue_group->iq_ci[RAID_PATH];
2787
2788                 if (pqi_num_elements_free(iq_pi, iq_ci,
2789                         ctrl_info->num_elements_per_iq))
2790                         break;
2791
2792                 spin_unlock_irqrestore(
2793                         &queue_group->submit_lock[RAID_PATH], flags);
2794
2795                 if (pqi_ctrl_offline(ctrl_info))
2796                         return;
2797         }
2798
2799         next_element = queue_group->iq_element_array[RAID_PATH] +
2800                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
2801
2802         memcpy(next_element, iu, iu_length);
2803
2804         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
2805         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
2806
2807         /*
2808          * This write notifies the controller that an IU is available to be
2809          * processed.
2810          */
2811         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
2812
2813         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
2814 }
2815
2816 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
2817         struct pqi_event *event)
2818 {
2819         struct pqi_event_acknowledge_request request;
2820
2821         memset(&request, 0, sizeof(request));
2822
2823         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
2824         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
2825                 &request.header.iu_length);
2826         request.event_type = event->event_type;
2827         request.event_id = event->event_id;
2828         request.additional_event_id = event->additional_event_id;
2829
2830         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
2831 }
2832
2833 static void pqi_event_worker(struct work_struct *work)
2834 {
2835         unsigned int i;
2836         struct pqi_ctrl_info *ctrl_info;
2837         struct pqi_event *event;
2838
2839         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
2840
2841         pqi_ctrl_busy(ctrl_info);
2842         pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
2843         if (pqi_ctrl_offline(ctrl_info))
2844                 goto out;
2845
2846         pqi_schedule_rescan_worker_delayed(ctrl_info);
2847
2848         event = ctrl_info->events;
2849         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
2850                 if (event->pending) {
2851                         event->pending = false;
2852                         pqi_acknowledge_event(ctrl_info, event);
2853                 }
2854                 event++;
2855         }
2856
2857 out:
2858         pqi_ctrl_unbusy(ctrl_info);
2859 }
2860
2861 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * HZ)
2862
2863 static void pqi_heartbeat_timer_handler(unsigned long data)
2864 {
2865         int num_interrupts;
2866         u32 heartbeat_count;
2867         struct pqi_ctrl_info *ctrl_info = (struct pqi_ctrl_info *)data;
2868
2869         pqi_check_ctrl_health(ctrl_info);
2870         if (pqi_ctrl_offline(ctrl_info))
2871                 return;
2872
2873         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
2874         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
2875
2876         if (num_interrupts == ctrl_info->previous_num_interrupts) {
2877                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
2878                         dev_err(&ctrl_info->pci_dev->dev,
2879                                 "no heartbeat detected - last heartbeat count: %u\n",
2880                                 heartbeat_count);
2881                         pqi_take_ctrl_offline(ctrl_info);
2882                         return;
2883                 }
2884         } else {
2885                 ctrl_info->previous_num_interrupts = num_interrupts;
2886         }
2887
2888         ctrl_info->previous_heartbeat_count = heartbeat_count;
2889         mod_timer(&ctrl_info->heartbeat_timer,
2890                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
2891 }
2892
2893 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2894 {
2895         if (!ctrl_info->heartbeat_counter)
2896                 return;
2897
2898         ctrl_info->previous_num_interrupts =
2899                 atomic_read(&ctrl_info->num_interrupts);
2900         ctrl_info->previous_heartbeat_count =
2901                 pqi_read_heartbeat_counter(ctrl_info);
2902
2903         ctrl_info->heartbeat_timer.expires =
2904                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
2905         ctrl_info->heartbeat_timer.data = (unsigned long)ctrl_info;
2906         ctrl_info->heartbeat_timer.function = pqi_heartbeat_timer_handler;
2907         add_timer(&ctrl_info->heartbeat_timer);
2908 }
2909
2910 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2911 {
2912         del_timer_sync(&ctrl_info->heartbeat_timer);
2913 }
2914
2915 static inline int pqi_event_type_to_event_index(unsigned int event_type)
2916 {
2917         int index;
2918
2919         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
2920                 if (event_type == pqi_supported_event_types[index])
2921                         return index;
2922
2923         return -1;
2924 }
2925
2926 static inline bool pqi_is_supported_event(unsigned int event_type)
2927 {
2928         return pqi_event_type_to_event_index(event_type) != -1;
2929 }
2930
2931 static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
2932 {
2933         unsigned int num_events;
2934         pqi_index_t oq_pi;
2935         pqi_index_t oq_ci;
2936         struct pqi_event_queue *event_queue;
2937         struct pqi_event_response *response;
2938         struct pqi_event *event;
2939         int event_index;
2940
2941         event_queue = &ctrl_info->event_queue;
2942         num_events = 0;
2943         oq_ci = event_queue->oq_ci_copy;
2944
2945         while (1) {
2946                 oq_pi = *event_queue->oq_pi;
2947                 if (oq_pi == oq_ci)
2948                         break;
2949
2950                 num_events++;
2951                 response = event_queue->oq_element_array +
2952                         (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
2953
2954                 event_index =
2955                         pqi_event_type_to_event_index(response->event_type);
2956
2957                 if (event_index >= 0) {
2958                         if (response->request_acknowlege) {
2959                                 event = &ctrl_info->events[event_index];
2960                                 event->pending = true;
2961                                 event->event_type = response->event_type;
2962                                 event->event_id = response->event_id;
2963                                 event->additional_event_id =
2964                                         response->additional_event_id;
2965                         }
2966                 }
2967
2968                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
2969         }
2970
2971         if (num_events) {
2972                 event_queue->oq_ci_copy = oq_ci;
2973                 writel(oq_ci, event_queue->oq_ci);
2974                 schedule_work(&ctrl_info->event_work);
2975         }
2976
2977         return num_events;
2978 }
2979
2980 #define PQI_LEGACY_INTX_MASK    0x1
2981
2982 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info,
2983                                                 bool enable_intx)
2984 {
2985         u32 intx_mask;
2986         struct pqi_device_registers __iomem *pqi_registers;
2987         volatile void __iomem *register_addr;
2988
2989         pqi_registers = ctrl_info->pqi_registers;
2990
2991         if (enable_intx)
2992                 register_addr = &pqi_registers->legacy_intx_mask_clear;
2993         else
2994                 register_addr = &pqi_registers->legacy_intx_mask_set;
2995
2996         intx_mask = readl(register_addr);
2997         intx_mask |= PQI_LEGACY_INTX_MASK;
2998         writel(intx_mask, register_addr);
2999 }
3000
3001 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3002         enum pqi_irq_mode new_mode)
3003 {
3004         switch (ctrl_info->irq_mode) {
3005         case IRQ_MODE_MSIX:
3006                 switch (new_mode) {
3007                 case IRQ_MODE_MSIX:
3008                         break;
3009                 case IRQ_MODE_INTX:
3010                         pqi_configure_legacy_intx(ctrl_info, true);
3011                         sis_enable_intx(ctrl_info);
3012                         break;
3013                 case IRQ_MODE_NONE:
3014                         break;
3015                 }
3016                 break;
3017         case IRQ_MODE_INTX:
3018                 switch (new_mode) {
3019                 case IRQ_MODE_MSIX:
3020                         pqi_configure_legacy_intx(ctrl_info, false);
3021                         sis_enable_msix(ctrl_info);
3022                         break;
3023                 case IRQ_MODE_INTX:
3024                         break;
3025                 case IRQ_MODE_NONE:
3026                         pqi_configure_legacy_intx(ctrl_info, false);
3027                         break;
3028                 }
3029                 break;
3030         case IRQ_MODE_NONE:
3031                 switch (new_mode) {
3032                 case IRQ_MODE_MSIX:
3033                         sis_enable_msix(ctrl_info);
3034                         break;
3035                 case IRQ_MODE_INTX:
3036                         pqi_configure_legacy_intx(ctrl_info, true);
3037                         sis_enable_intx(ctrl_info);
3038                         break;
3039                 case IRQ_MODE_NONE:
3040                         break;
3041                 }
3042                 break;
3043         }
3044
3045         ctrl_info->irq_mode = new_mode;
3046 }
3047
3048 #define PQI_LEGACY_INTX_PENDING         0x1
3049
3050 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3051 {
3052         bool valid_irq;
3053         u32 intx_status;
3054
3055         switch (ctrl_info->irq_mode) {
3056         case IRQ_MODE_MSIX:
3057                 valid_irq = true;
3058                 break;
3059         case IRQ_MODE_INTX:
3060                 intx_status =
3061                         readl(&ctrl_info->pqi_registers->legacy_intx_status);
3062                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3063                         valid_irq = true;
3064                 else
3065                         valid_irq = false;
3066                 break;
3067         case IRQ_MODE_NONE:
3068         default:
3069                 valid_irq = false;
3070                 break;
3071         }
3072
3073         return valid_irq;
3074 }
3075
3076 static irqreturn_t pqi_irq_handler(int irq, void *data)
3077 {
3078         struct pqi_ctrl_info *ctrl_info;
3079         struct pqi_queue_group *queue_group;
3080         unsigned int num_responses_handled;
3081
3082         queue_group = data;
3083         ctrl_info = queue_group->ctrl_info;
3084
3085         if (!pqi_is_valid_irq(ctrl_info))
3086                 return IRQ_NONE;
3087
3088         num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3089
3090         if (irq == ctrl_info->event_irq)
3091                 num_responses_handled += pqi_process_event_intr(ctrl_info);
3092
3093         if (num_responses_handled)
3094                 atomic_inc(&ctrl_info->num_interrupts);
3095
3096         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3097         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3098
3099         return IRQ_HANDLED;
3100 }
3101
3102 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3103 {
3104         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3105         int i;
3106         int rc;
3107
3108         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3109
3110         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3111                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3112                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3113                 if (rc) {
3114                         dev_err(&pci_dev->dev,
3115                                 "irq %u init failed with error %d\n",
3116                                 pci_irq_vector(pci_dev, i), rc);
3117                         return rc;
3118                 }
3119                 ctrl_info->num_msix_vectors_initialized++;
3120         }
3121
3122         return 0;
3123 }
3124
3125 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3126 {
3127         int i;
3128
3129         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3130                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3131                         &ctrl_info->queue_groups[i]);
3132
3133         ctrl_info->num_msix_vectors_initialized = 0;
3134 }
3135
3136 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3137 {
3138         int num_vectors_enabled;
3139
3140         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3141                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3142                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3143         if (num_vectors_enabled < 0) {
3144                 dev_err(&ctrl_info->pci_dev->dev,
3145                         "MSI-X init failed with error %d\n",
3146                         num_vectors_enabled);
3147                 return num_vectors_enabled;
3148         }
3149
3150         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3151         ctrl_info->irq_mode = IRQ_MODE_MSIX;
3152         return 0;
3153 }
3154
3155 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3156 {
3157         if (ctrl_info->num_msix_vectors_enabled) {
3158                 pci_free_irq_vectors(ctrl_info->pci_dev);
3159                 ctrl_info->num_msix_vectors_enabled = 0;
3160         }
3161 }
3162
3163 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3164 {
3165         unsigned int i;
3166         size_t alloc_length;
3167         size_t element_array_length_per_iq;
3168         size_t element_array_length_per_oq;
3169         void *element_array;
3170         void *next_queue_index;
3171         void *aligned_pointer;
3172         unsigned int num_inbound_queues;
3173         unsigned int num_outbound_queues;
3174         unsigned int num_queue_indexes;
3175         struct pqi_queue_group *queue_group;
3176
3177         element_array_length_per_iq =
3178                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3179                 ctrl_info->num_elements_per_iq;
3180         element_array_length_per_oq =
3181                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3182                 ctrl_info->num_elements_per_oq;
3183         num_inbound_queues = ctrl_info->num_queue_groups * 2;
3184         num_outbound_queues = ctrl_info->num_queue_groups;
3185         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3186
3187         aligned_pointer = NULL;
3188
3189         for (i = 0; i < num_inbound_queues; i++) {
3190                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3191                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3192                 aligned_pointer += element_array_length_per_iq;
3193         }
3194
3195         for (i = 0; i < num_outbound_queues; i++) {
3196                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3197                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3198                 aligned_pointer += element_array_length_per_oq;
3199         }
3200
3201         aligned_pointer = PTR_ALIGN(aligned_pointer,
3202                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3203         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3204                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3205
3206         for (i = 0; i < num_queue_indexes; i++) {
3207                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3208                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3209                 aligned_pointer += sizeof(pqi_index_t);
3210         }
3211
3212         alloc_length = (size_t)aligned_pointer +
3213                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3214
3215         alloc_length += PQI_EXTRA_SGL_MEMORY;
3216
3217         ctrl_info->queue_memory_base =
3218                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3219                         alloc_length,
3220                         &ctrl_info->queue_memory_base_dma_handle, GFP_KERNEL);
3221
3222         if (!ctrl_info->queue_memory_base)
3223                 return -ENOMEM;
3224
3225         ctrl_info->queue_memory_length = alloc_length;
3226
3227         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3228                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3229
3230         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3231                 queue_group = &ctrl_info->queue_groups[i];
3232                 queue_group->iq_element_array[RAID_PATH] = element_array;
3233                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3234                         ctrl_info->queue_memory_base_dma_handle +
3235                                 (element_array - ctrl_info->queue_memory_base);
3236                 element_array += element_array_length_per_iq;
3237                 element_array = PTR_ALIGN(element_array,
3238                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3239                 queue_group->iq_element_array[AIO_PATH] = element_array;
3240                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3241                         ctrl_info->queue_memory_base_dma_handle +
3242                         (element_array - ctrl_info->queue_memory_base);
3243                 element_array += element_array_length_per_iq;
3244                 element_array = PTR_ALIGN(element_array,
3245                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3246         }
3247
3248         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3249                 queue_group = &ctrl_info->queue_groups[i];
3250                 queue_group->oq_element_array = element_array;
3251                 queue_group->oq_element_array_bus_addr =
3252                         ctrl_info->queue_memory_base_dma_handle +
3253                         (element_array - ctrl_info->queue_memory_base);
3254                 element_array += element_array_length_per_oq;
3255                 element_array = PTR_ALIGN(element_array,
3256                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3257         }
3258
3259         ctrl_info->event_queue.oq_element_array = element_array;
3260         ctrl_info->event_queue.oq_element_array_bus_addr =
3261                 ctrl_info->queue_memory_base_dma_handle +
3262                 (element_array - ctrl_info->queue_memory_base);
3263         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3264                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3265
3266         next_queue_index = PTR_ALIGN(element_array,
3267                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3268
3269         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3270                 queue_group = &ctrl_info->queue_groups[i];
3271                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3272                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3273                         ctrl_info->queue_memory_base_dma_handle +
3274                         (next_queue_index - ctrl_info->queue_memory_base);
3275                 next_queue_index += sizeof(pqi_index_t);
3276                 next_queue_index = PTR_ALIGN(next_queue_index,
3277                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3278                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3279                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3280                         ctrl_info->queue_memory_base_dma_handle +
3281                         (next_queue_index - ctrl_info->queue_memory_base);
3282                 next_queue_index += sizeof(pqi_index_t);
3283                 next_queue_index = PTR_ALIGN(next_queue_index,
3284                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3285                 queue_group->oq_pi = next_queue_index;
3286                 queue_group->oq_pi_bus_addr =
3287                         ctrl_info->queue_memory_base_dma_handle +
3288                         (next_queue_index - ctrl_info->queue_memory_base);
3289                 next_queue_index += sizeof(pqi_index_t);
3290                 next_queue_index = PTR_ALIGN(next_queue_index,
3291                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3292         }
3293
3294         ctrl_info->event_queue.oq_pi = next_queue_index;
3295         ctrl_info->event_queue.oq_pi_bus_addr =
3296                 ctrl_info->queue_memory_base_dma_handle +
3297                 (next_queue_index - ctrl_info->queue_memory_base);
3298
3299         return 0;
3300 }
3301
3302 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3303 {
3304         unsigned int i;
3305         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3306         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3307
3308         /*
3309          * Initialize the backpointers to the controller structure in
3310          * each operational queue group structure.
3311          */
3312         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3313                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3314
3315         /*
3316          * Assign IDs to all operational queues.  Note that the IDs
3317          * assigned to operational IQs are independent of the IDs
3318          * assigned to operational OQs.
3319          */
3320         ctrl_info->event_queue.oq_id = next_oq_id++;
3321         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3322                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3323                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3324                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3325         }
3326
3327         /*
3328          * Assign MSI-X table entry indexes to all queues.  Note that the
3329          * interrupt for the event queue is shared with the first queue group.
3330          */
3331         ctrl_info->event_queue.int_msg_num = 0;
3332         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3333                 ctrl_info->queue_groups[i].int_msg_num = i;
3334
3335         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3336                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3337                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3338                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3339                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3340         }
3341 }
3342
3343 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3344 {
3345         size_t alloc_length;
3346         struct pqi_admin_queues_aligned *admin_queues_aligned;
3347         struct pqi_admin_queues *admin_queues;
3348
3349         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3350                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3351
3352         ctrl_info->admin_queue_memory_base =
3353                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3354                         alloc_length,
3355                         &ctrl_info->admin_queue_memory_base_dma_handle,
3356                         GFP_KERNEL);
3357
3358         if (!ctrl_info->admin_queue_memory_base)
3359                 return -ENOMEM;
3360
3361         ctrl_info->admin_queue_memory_length = alloc_length;
3362
3363         admin_queues = &ctrl_info->admin_queues;
3364         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3365                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3366         admin_queues->iq_element_array =
3367                 &admin_queues_aligned->iq_element_array;
3368         admin_queues->oq_element_array =
3369                 &admin_queues_aligned->oq_element_array;
3370         admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3371         admin_queues->oq_pi = &admin_queues_aligned->oq_pi;
3372
3373         admin_queues->iq_element_array_bus_addr =
3374                 ctrl_info->admin_queue_memory_base_dma_handle +
3375                 (admin_queues->iq_element_array -
3376                 ctrl_info->admin_queue_memory_base);
3377         admin_queues->oq_element_array_bus_addr =
3378                 ctrl_info->admin_queue_memory_base_dma_handle +
3379                 (admin_queues->oq_element_array -
3380                 ctrl_info->admin_queue_memory_base);
3381         admin_queues->iq_ci_bus_addr =
3382                 ctrl_info->admin_queue_memory_base_dma_handle +
3383                 ((void *)admin_queues->iq_ci -
3384                 ctrl_info->admin_queue_memory_base);
3385         admin_queues->oq_pi_bus_addr =
3386                 ctrl_info->admin_queue_memory_base_dma_handle +
3387                 ((void *)admin_queues->oq_pi -
3388                 ctrl_info->admin_queue_memory_base);
3389
3390         return 0;
3391 }
3392
3393 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          HZ
3394 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
3395
3396 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3397 {
3398         struct pqi_device_registers __iomem *pqi_registers;
3399         struct pqi_admin_queues *admin_queues;
3400         unsigned long timeout;
3401         u8 status;
3402         u32 reg;
3403
3404         pqi_registers = ctrl_info->pqi_registers;
3405         admin_queues = &ctrl_info->admin_queues;
3406
3407         writeq((u64)admin_queues->iq_element_array_bus_addr,
3408                 &pqi_registers->admin_iq_element_array_addr);
3409         writeq((u64)admin_queues->oq_element_array_bus_addr,
3410                 &pqi_registers->admin_oq_element_array_addr);
3411         writeq((u64)admin_queues->iq_ci_bus_addr,
3412                 &pqi_registers->admin_iq_ci_addr);
3413         writeq((u64)admin_queues->oq_pi_bus_addr,
3414                 &pqi_registers->admin_oq_pi_addr);
3415
3416         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3417                 (PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
3418                 (admin_queues->int_msg_num << 16);
3419         writel(reg, &pqi_registers->admin_iq_num_elements);
3420         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3421                 &pqi_registers->function_and_status_code);
3422
3423         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3424         while (1) {
3425                 status = readb(&pqi_registers->function_and_status_code);
3426                 if (status == PQI_STATUS_IDLE)
3427                         break;
3428                 if (time_after(jiffies, timeout))
3429                         return -ETIMEDOUT;
3430                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3431         }
3432
3433         /*
3434          * The offset registers are not initialized to the correct
3435          * offsets until *after* the create admin queue pair command
3436          * completes successfully.
3437          */
3438         admin_queues->iq_pi = ctrl_info->iomem_base +
3439                 PQI_DEVICE_REGISTERS_OFFSET +
3440                 readq(&pqi_registers->admin_iq_pi_offset);
3441         admin_queues->oq_ci = ctrl_info->iomem_base +
3442                 PQI_DEVICE_REGISTERS_OFFSET +
3443                 readq(&pqi_registers->admin_oq_ci_offset);
3444
3445         return 0;
3446 }
3447
3448 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3449         struct pqi_general_admin_request *request)
3450 {
3451         struct pqi_admin_queues *admin_queues;
3452         void *next_element;
3453         pqi_index_t iq_pi;
3454
3455         admin_queues = &ctrl_info->admin_queues;
3456         iq_pi = admin_queues->iq_pi_copy;
3457
3458         next_element = admin_queues->iq_element_array +
3459                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3460
3461         memcpy(next_element, request, sizeof(*request));
3462
3463         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3464         admin_queues->iq_pi_copy = iq_pi;
3465
3466         /*
3467          * This write notifies the controller that an IU is available to be
3468          * processed.
3469          */
3470         writel(iq_pi, admin_queues->iq_pi);
3471 }
3472
3473 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
3474
3475 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3476         struct pqi_general_admin_response *response)
3477 {
3478         struct pqi_admin_queues *admin_queues;
3479         pqi_index_t oq_pi;
3480         pqi_index_t oq_ci;
3481         unsigned long timeout;
3482
3483         admin_queues = &ctrl_info->admin_queues;
3484         oq_ci = admin_queues->oq_ci_copy;
3485
3486         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
3487
3488         while (1) {
3489                 oq_pi = *admin_queues->oq_pi;
3490                 if (oq_pi != oq_ci)
3491                         break;
3492                 if (time_after(jiffies, timeout)) {
3493                         dev_err(&ctrl_info->pci_dev->dev,
3494                                 "timed out waiting for admin response\n");
3495                         return -ETIMEDOUT;
3496                 }
3497                 if (!sis_is_firmware_running(ctrl_info))
3498                         return -ENXIO;
3499                 usleep_range(1000, 2000);
3500         }
3501
3502         memcpy(response, admin_queues->oq_element_array +
3503                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3504
3505         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3506         admin_queues->oq_ci_copy = oq_ci;
3507         writel(oq_ci, admin_queues->oq_ci);
3508
3509         return 0;
3510 }
3511
3512 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3513         struct pqi_queue_group *queue_group, enum pqi_io_path path,
3514         struct pqi_io_request *io_request)
3515 {
3516         struct pqi_io_request *next;
3517         void *next_element;
3518         pqi_index_t iq_pi;
3519         pqi_index_t iq_ci;
3520         size_t iu_length;
3521         unsigned long flags;
3522         unsigned int num_elements_needed;
3523         unsigned int num_elements_to_end_of_queue;
3524         size_t copy_count;
3525         struct pqi_iu_header *request;
3526
3527         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3528
3529         if (io_request) {
3530                 io_request->queue_group = queue_group;
3531                 list_add_tail(&io_request->request_list_entry,
3532                         &queue_group->request_list[path]);
3533         }
3534
3535         iq_pi = queue_group->iq_pi_copy[path];
3536
3537         list_for_each_entry_safe(io_request, next,
3538                 &queue_group->request_list[path], request_list_entry) {
3539
3540                 request = io_request->iu;
3541
3542                 iu_length = get_unaligned_le16(&request->iu_length) +
3543                         PQI_REQUEST_HEADER_LENGTH;
3544                 num_elements_needed =
3545                         DIV_ROUND_UP(iu_length,
3546                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3547
3548                 iq_ci = *queue_group->iq_ci[path];
3549
3550                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3551                         ctrl_info->num_elements_per_iq))
3552                         break;
3553
3554                 put_unaligned_le16(queue_group->oq_id,
3555                         &request->response_queue_id);
3556
3557                 next_element = queue_group->iq_element_array[path] +
3558                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3559
3560                 num_elements_to_end_of_queue =
3561                         ctrl_info->num_elements_per_iq - iq_pi;
3562
3563                 if (num_elements_needed <= num_elements_to_end_of_queue) {
3564                         memcpy(next_element, request, iu_length);
3565                 } else {
3566                         copy_count = num_elements_to_end_of_queue *
3567                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3568                         memcpy(next_element, request, copy_count);
3569                         memcpy(queue_group->iq_element_array[path],
3570                                 (u8 *)request + copy_count,
3571                                 iu_length - copy_count);
3572                 }
3573
3574                 iq_pi = (iq_pi + num_elements_needed) %
3575                         ctrl_info->num_elements_per_iq;
3576
3577                 list_del(&io_request->request_list_entry);
3578         }
3579
3580         if (iq_pi != queue_group->iq_pi_copy[path]) {
3581                 queue_group->iq_pi_copy[path] = iq_pi;
3582                 /*
3583                  * This write notifies the controller that one or more IUs are
3584                  * available to be processed.
3585                  */
3586                 writel(iq_pi, queue_group->iq_pi[path]);
3587         }
3588
3589         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3590 }
3591
3592 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
3593
3594 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
3595         struct completion *wait)
3596 {
3597         int rc;
3598
3599         while (1) {
3600                 if (wait_for_completion_io_timeout(wait,
3601                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
3602                         rc = 0;
3603                         break;
3604                 }
3605
3606                 pqi_check_ctrl_health(ctrl_info);
3607                 if (pqi_ctrl_offline(ctrl_info)) {
3608                         rc = -ENXIO;
3609                         break;
3610                 }
3611         }
3612
3613         return rc;
3614 }
3615
3616 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3617         void *context)
3618 {
3619         struct completion *waiting = context;
3620
3621         complete(waiting);
3622 }
3623
3624 static int pqi_submit_raid_request_synchronous_with_io_request(
3625         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
3626         unsigned long timeout_msecs)
3627 {
3628         int rc = 0;
3629         DECLARE_COMPLETION_ONSTACK(wait);
3630
3631         io_request->io_complete_callback = pqi_raid_synchronous_complete;
3632         io_request->context = &wait;
3633
3634         pqi_start_io(ctrl_info,
3635                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
3636                 io_request);
3637
3638         if (timeout_msecs == NO_TIMEOUT) {
3639                 pqi_wait_for_completion_io(ctrl_info, &wait);
3640         } else {
3641                 if (!wait_for_completion_io_timeout(&wait,
3642                         msecs_to_jiffies(timeout_msecs))) {
3643                         dev_warn(&ctrl_info->pci_dev->dev,
3644                                 "command timed out\n");
3645                         rc = -ETIMEDOUT;
3646                 }
3647         }
3648
3649         return rc;
3650 }
3651
3652 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
3653         struct pqi_iu_header *request, unsigned int flags,
3654         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
3655 {
3656         int rc;
3657         struct pqi_io_request *io_request;
3658         unsigned long start_jiffies;
3659         unsigned long msecs_blocked;
3660         size_t iu_length;
3661
3662         /*
3663          * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
3664          * are mutually exclusive.
3665          */
3666
3667         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
3668                 if (down_interruptible(&ctrl_info->sync_request_sem))
3669                         return -ERESTARTSYS;
3670         } else {
3671                 if (timeout_msecs == NO_TIMEOUT) {
3672                         down(&ctrl_info->sync_request_sem);
3673                 } else {
3674                         start_jiffies = jiffies;
3675                         if (down_timeout(&ctrl_info->sync_request_sem,
3676                                 msecs_to_jiffies(timeout_msecs)))
3677                                 return -ETIMEDOUT;
3678                         msecs_blocked =
3679                                 jiffies_to_msecs(jiffies - start_jiffies);
3680                         if (msecs_blocked >= timeout_msecs)
3681                                 return -ETIMEDOUT;
3682                         timeout_msecs -= msecs_blocked;
3683                 }
3684         }
3685
3686         pqi_ctrl_busy(ctrl_info);
3687         timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs);
3688         if (timeout_msecs == 0) {
3689                 rc = -ETIMEDOUT;
3690                 goto out;
3691         }
3692
3693         if (pqi_ctrl_offline(ctrl_info)) {
3694                 rc = -ENXIO;
3695                 goto out;
3696         }
3697
3698         io_request = pqi_alloc_io_request(ctrl_info);
3699
3700         put_unaligned_le16(io_request->index,
3701                 &(((struct pqi_raid_path_request *)request)->request_id));
3702
3703         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
3704                 ((struct pqi_raid_path_request *)request)->error_index =
3705                         ((struct pqi_raid_path_request *)request)->request_id;
3706
3707         iu_length = get_unaligned_le16(&request->iu_length) +
3708                 PQI_REQUEST_HEADER_LENGTH;
3709         memcpy(io_request->iu, request, iu_length);
3710
3711         rc = pqi_submit_raid_request_synchronous_with_io_request(ctrl_info,
3712                 io_request, timeout_msecs);
3713
3714         if (error_info) {
3715                 if (io_request->error_info)
3716                         memcpy(error_info, io_request->error_info,
3717                                 sizeof(*error_info));
3718                 else
3719                         memset(error_info, 0, sizeof(*error_info));
3720         } else if (rc == 0 && io_request->error_info) {
3721                 u8 scsi_status;
3722                 struct pqi_raid_error_info *raid_error_info;
3723
3724                 raid_error_info = io_request->error_info;
3725                 scsi_status = raid_error_info->status;
3726
3727                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3728                         raid_error_info->data_out_result ==
3729                         PQI_DATA_IN_OUT_UNDERFLOW)
3730                         scsi_status = SAM_STAT_GOOD;
3731
3732                 if (scsi_status != SAM_STAT_GOOD)
3733                         rc = -EIO;
3734         }
3735
3736         pqi_free_io_request(io_request);
3737
3738 out:
3739         pqi_ctrl_unbusy(ctrl_info);
3740         up(&ctrl_info->sync_request_sem);
3741
3742         return rc;
3743 }
3744
3745 static int pqi_validate_admin_response(
3746         struct pqi_general_admin_response *response, u8 expected_function_code)
3747 {
3748         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
3749                 return -EINVAL;
3750
3751         if (get_unaligned_le16(&response->header.iu_length) !=
3752                 PQI_GENERAL_ADMIN_IU_LENGTH)
3753                 return -EINVAL;
3754
3755         if (response->function_code != expected_function_code)
3756                 return -EINVAL;
3757
3758         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
3759                 return -EINVAL;
3760
3761         return 0;
3762 }
3763
3764 static int pqi_submit_admin_request_synchronous(
3765         struct pqi_ctrl_info *ctrl_info,
3766         struct pqi_general_admin_request *request,
3767         struct pqi_general_admin_response *response)
3768 {
3769         int rc;
3770
3771         pqi_submit_admin_request(ctrl_info, request);
3772
3773         rc = pqi_poll_for_admin_response(ctrl_info, response);
3774
3775         if (rc == 0)
3776                 rc = pqi_validate_admin_response(response,
3777                         request->function_code);
3778
3779         return rc;
3780 }
3781
3782 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
3783 {
3784         int rc;
3785         struct pqi_general_admin_request request;
3786         struct pqi_general_admin_response response;
3787         struct pqi_device_capability *capability;
3788         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
3789
3790         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
3791         if (!capability)
3792                 return -ENOMEM;
3793
3794         memset(&request, 0, sizeof(request));
3795
3796         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3797         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3798                 &request.header.iu_length);
3799         request.function_code =
3800                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
3801         put_unaligned_le32(sizeof(*capability),
3802                 &request.data.report_device_capability.buffer_length);
3803
3804         rc = pqi_map_single(ctrl_info->pci_dev,
3805                 &request.data.report_device_capability.sg_descriptor,
3806                 capability, sizeof(*capability),
3807                 PCI_DMA_FROMDEVICE);
3808         if (rc)
3809                 goto out;
3810
3811         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3812                 &response);
3813
3814         pqi_pci_unmap(ctrl_info->pci_dev,
3815                 &request.data.report_device_capability.sg_descriptor, 1,
3816                 PCI_DMA_FROMDEVICE);
3817
3818         if (rc)
3819                 goto out;
3820
3821         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
3822                 rc = -EIO;
3823                 goto out;
3824         }
3825
3826         ctrl_info->max_inbound_queues =
3827                 get_unaligned_le16(&capability->max_inbound_queues);
3828         ctrl_info->max_elements_per_iq =
3829                 get_unaligned_le16(&capability->max_elements_per_iq);
3830         ctrl_info->max_iq_element_length =
3831                 get_unaligned_le16(&capability->max_iq_element_length)
3832                 * 16;
3833         ctrl_info->max_outbound_queues =
3834                 get_unaligned_le16(&capability->max_outbound_queues);
3835         ctrl_info->max_elements_per_oq =
3836                 get_unaligned_le16(&capability->max_elements_per_oq);
3837         ctrl_info->max_oq_element_length =
3838                 get_unaligned_le16(&capability->max_oq_element_length)
3839                 * 16;
3840
3841         sop_iu_layer_descriptor =
3842                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
3843
3844         ctrl_info->max_inbound_iu_length_per_firmware =
3845                 get_unaligned_le16(
3846                         &sop_iu_layer_descriptor->max_inbound_iu_length);
3847         ctrl_info->inbound_spanning_supported =
3848                 sop_iu_layer_descriptor->inbound_spanning_supported;
3849         ctrl_info->outbound_spanning_supported =
3850                 sop_iu_layer_descriptor->outbound_spanning_supported;
3851
3852 out:
3853         kfree(capability);
3854
3855         return rc;
3856 }
3857
3858 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
3859 {
3860         if (ctrl_info->max_iq_element_length <
3861                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3862                 dev_err(&ctrl_info->pci_dev->dev,
3863                         "max. inbound queue element length of %d is less than the required length of %d\n",
3864                         ctrl_info->max_iq_element_length,
3865                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3866                 return -EINVAL;
3867         }
3868
3869         if (ctrl_info->max_oq_element_length <
3870                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
3871                 dev_err(&ctrl_info->pci_dev->dev,
3872                         "max. outbound queue element length of %d is less than the required length of %d\n",
3873                         ctrl_info->max_oq_element_length,
3874                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3875                 return -EINVAL;
3876         }
3877
3878         if (ctrl_info->max_inbound_iu_length_per_firmware <
3879                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3880                 dev_err(&ctrl_info->pci_dev->dev,
3881                         "max. inbound IU length of %u is less than the min. required length of %d\n",
3882                         ctrl_info->max_inbound_iu_length_per_firmware,
3883                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3884                 return -EINVAL;
3885         }
3886
3887         if (!ctrl_info->inbound_spanning_supported) {
3888                 dev_err(&ctrl_info->pci_dev->dev,
3889                         "the controller does not support inbound spanning\n");
3890                 return -EINVAL;
3891         }
3892
3893         if (ctrl_info->outbound_spanning_supported) {
3894                 dev_err(&ctrl_info->pci_dev->dev,
3895                         "the controller supports outbound spanning but this driver does not\n");
3896                 return -EINVAL;
3897         }
3898
3899         return 0;
3900 }
3901
3902 static int pqi_delete_operational_queue(struct pqi_ctrl_info *ctrl_info,
3903         bool inbound_queue, u16 queue_id)
3904 {
3905         struct pqi_general_admin_request request;
3906         struct pqi_general_admin_response response;
3907
3908         memset(&request, 0, sizeof(request));
3909         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3910         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3911                 &request.header.iu_length);
3912         if (inbound_queue)
3913                 request.function_code =
3914                         PQI_GENERAL_ADMIN_FUNCTION_DELETE_IQ;
3915         else
3916                 request.function_code =
3917                         PQI_GENERAL_ADMIN_FUNCTION_DELETE_OQ;
3918         put_unaligned_le16(queue_id,
3919                 &request.data.delete_operational_queue.queue_id);
3920
3921         return pqi_submit_admin_request_synchronous(ctrl_info, &request,
3922                 &response);
3923 }
3924
3925 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
3926 {
3927         int rc;
3928         struct pqi_event_queue *event_queue;
3929         struct pqi_general_admin_request request;
3930         struct pqi_general_admin_response response;
3931
3932         event_queue = &ctrl_info->event_queue;
3933
3934         /*
3935          * Create OQ (Outbound Queue - device to host queue) to dedicate
3936          * to events.
3937          */
3938         memset(&request, 0, sizeof(request));
3939         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3940         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3941                 &request.header.iu_length);
3942         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
3943         put_unaligned_le16(event_queue->oq_id,
3944                 &request.data.create_operational_oq.queue_id);
3945         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
3946                 &request.data.create_operational_oq.element_array_addr);
3947         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
3948                 &request.data.create_operational_oq.pi_addr);
3949         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
3950                 &request.data.create_operational_oq.num_elements);
3951         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
3952                 &request.data.create_operational_oq.element_length);
3953         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
3954         put_unaligned_le16(event_queue->int_msg_num,
3955                 &request.data.create_operational_oq.int_msg_num);
3956
3957         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3958                 &response);
3959         if (rc)
3960                 return rc;
3961
3962         event_queue->oq_ci = ctrl_info->iomem_base +
3963                 PQI_DEVICE_REGISTERS_OFFSET +
3964                 get_unaligned_le64(
3965                         &response.data.create_operational_oq.oq_ci_offset);
3966
3967         return 0;
3968 }
3969
3970 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
3971         unsigned int group_number)
3972 {
3973         int rc;
3974         struct pqi_queue_group *queue_group;
3975         struct pqi_general_admin_request request;
3976         struct pqi_general_admin_response response;
3977
3978         queue_group = &ctrl_info->queue_groups[group_number];
3979
3980         /*
3981          * Create IQ (Inbound Queue - host to device queue) for
3982          * RAID path.
3983          */
3984         memset(&request, 0, sizeof(request));
3985         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3986         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3987                 &request.header.iu_length);
3988         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
3989         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
3990                 &request.data.create_operational_iq.queue_id);
3991         put_unaligned_le64(
3992                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
3993                 &request.data.create_operational_iq.element_array_addr);
3994         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
3995                 &request.data.create_operational_iq.ci_addr);
3996         put_unaligned_le16(ctrl_info->num_elements_per_iq,
3997                 &request.data.create_operational_iq.num_elements);
3998         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
3999                 &request.data.create_operational_iq.element_length);
4000         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4001
4002         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4003                 &response);
4004         if (rc) {
4005                 dev_err(&ctrl_info->pci_dev->dev,
4006                         "error creating inbound RAID queue\n");
4007                 return rc;
4008         }
4009
4010         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4011                 PQI_DEVICE_REGISTERS_OFFSET +
4012                 get_unaligned_le64(
4013                         &response.data.create_operational_iq.iq_pi_offset);
4014
4015         /*
4016          * Create IQ (Inbound Queue - host to device queue) for
4017          * Advanced I/O (AIO) path.
4018          */
4019         memset(&request, 0, sizeof(request));
4020         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4021         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4022                 &request.header.iu_length);
4023         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4024         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4025                 &request.data.create_operational_iq.queue_id);
4026         put_unaligned_le64((u64)queue_group->
4027                 iq_element_array_bus_addr[AIO_PATH],
4028                 &request.data.create_operational_iq.element_array_addr);
4029         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4030                 &request.data.create_operational_iq.ci_addr);
4031         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4032                 &request.data.create_operational_iq.num_elements);
4033         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4034                 &request.data.create_operational_iq.element_length);
4035         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4036
4037         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4038                 &response);
4039         if (rc) {
4040                 dev_err(&ctrl_info->pci_dev->dev,
4041                         "error creating inbound AIO queue\n");
4042                 goto delete_inbound_queue_raid;
4043         }
4044
4045         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4046                 PQI_DEVICE_REGISTERS_OFFSET +
4047                 get_unaligned_le64(
4048                         &response.data.create_operational_iq.iq_pi_offset);
4049
4050         /*
4051          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4052          * assumed to be for RAID path I/O unless we change the queue's
4053          * property.
4054          */
4055         memset(&request, 0, sizeof(request));
4056         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4057         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4058                 &request.header.iu_length);
4059         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4060         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4061                 &request.data.change_operational_iq_properties.queue_id);
4062         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4063                 &request.data.change_operational_iq_properties.vendor_specific);
4064
4065         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4066                 &response);
4067         if (rc) {
4068                 dev_err(&ctrl_info->pci_dev->dev,
4069                         "error changing queue property\n");
4070                 goto delete_inbound_queue_aio;
4071         }
4072
4073         /*
4074          * Create OQ (Outbound Queue - device to host queue).
4075          */
4076         memset(&request, 0, sizeof(request));
4077         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4078         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4079                 &request.header.iu_length);
4080         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4081         put_unaligned_le16(queue_group->oq_id,
4082                 &request.data.create_operational_oq.queue_id);
4083         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4084                 &request.data.create_operational_oq.element_array_addr);
4085         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4086                 &request.data.create_operational_oq.pi_addr);
4087         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4088                 &request.data.create_operational_oq.num_elements);
4089         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4090                 &request.data.create_operational_oq.element_length);
4091         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4092         put_unaligned_le16(queue_group->int_msg_num,
4093                 &request.data.create_operational_oq.int_msg_num);
4094
4095         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4096                 &response);
4097         if (rc) {
4098                 dev_err(&ctrl_info->pci_dev->dev,
4099                         "error creating outbound queue\n");
4100                 goto delete_inbound_queue_aio;
4101         }
4102
4103         queue_group->oq_ci = ctrl_info->iomem_base +
4104                 PQI_DEVICE_REGISTERS_OFFSET +
4105                 get_unaligned_le64(
4106                         &response.data.create_operational_oq.oq_ci_offset);
4107
4108         return 0;
4109
4110 delete_inbound_queue_aio:
4111         pqi_delete_operational_queue(ctrl_info, true,
4112                 queue_group->iq_id[AIO_PATH]);
4113
4114 delete_inbound_queue_raid:
4115         pqi_delete_operational_queue(ctrl_info, true,
4116                 queue_group->iq_id[RAID_PATH]);
4117
4118         return rc;
4119 }
4120
4121 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4122 {
4123         int rc;
4124         unsigned int i;
4125
4126         rc = pqi_create_event_queue(ctrl_info);
4127         if (rc) {
4128                 dev_err(&ctrl_info->pci_dev->dev,
4129                         "error creating event queue\n");
4130                 return rc;
4131         }
4132
4133         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4134                 rc = pqi_create_queue_group(ctrl_info, i);
4135                 if (rc) {
4136                         dev_err(&ctrl_info->pci_dev->dev,
4137                                 "error creating queue group number %u/%u\n",
4138                                 i, ctrl_info->num_queue_groups);
4139                         return rc;
4140                 }
4141         }
4142
4143         return 0;
4144 }
4145
4146 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4147         (offsetof(struct pqi_event_config, descriptors) + \
4148         (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
4149
4150 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4151         bool enable_events)
4152 {
4153         int rc;
4154         unsigned int i;
4155         struct pqi_event_config *event_config;
4156         struct pqi_event_descriptor *event_descriptor;
4157         struct pqi_general_management_request request;
4158
4159         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4160                 GFP_KERNEL);
4161         if (!event_config)
4162                 return -ENOMEM;
4163
4164         memset(&request, 0, sizeof(request));
4165
4166         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4167         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4168                 data.report_event_configuration.sg_descriptors[1]) -
4169                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4170         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4171                 &request.data.report_event_configuration.buffer_length);
4172
4173         rc = pqi_map_single(ctrl_info->pci_dev,
4174                 request.data.report_event_configuration.sg_descriptors,
4175                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4176                 PCI_DMA_FROMDEVICE);
4177         if (rc)
4178                 goto out;
4179
4180         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4181                 0, NULL, NO_TIMEOUT);
4182
4183         pqi_pci_unmap(ctrl_info->pci_dev,
4184                 request.data.report_event_configuration.sg_descriptors, 1,
4185                 PCI_DMA_FROMDEVICE);
4186
4187         if (rc)
4188                 goto out;
4189
4190         for (i = 0; i < event_config->num_event_descriptors; i++) {
4191                 event_descriptor = &event_config->descriptors[i];
4192                 if (enable_events &&
4193                         pqi_is_supported_event(event_descriptor->event_type))
4194                         put_unaligned_le16(ctrl_info->event_queue.oq_id,
4195                                         &event_descriptor->oq_id);
4196                 else
4197                         put_unaligned_le16(0, &event_descriptor->oq_id);
4198         }
4199
4200         memset(&request, 0, sizeof(request));
4201
4202         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4203         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4204                 data.report_event_configuration.sg_descriptors[1]) -
4205                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4206         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4207                 &request.data.report_event_configuration.buffer_length);
4208
4209         rc = pqi_map_single(ctrl_info->pci_dev,
4210                 request.data.report_event_configuration.sg_descriptors,
4211                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4212                 PCI_DMA_TODEVICE);
4213         if (rc)
4214                 goto out;
4215
4216         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
4217                 NULL, NO_TIMEOUT);
4218
4219         pqi_pci_unmap(ctrl_info->pci_dev,
4220                 request.data.report_event_configuration.sg_descriptors, 1,
4221                 PCI_DMA_TODEVICE);
4222
4223 out:
4224         kfree(event_config);
4225
4226         return rc;
4227 }
4228
4229 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4230 {
4231         return pqi_configure_events(ctrl_info, true);
4232 }
4233
4234 static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info)
4235 {
4236         return pqi_configure_events(ctrl_info, false);
4237 }
4238
4239 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4240 {
4241         unsigned int i;
4242         struct device *dev;
4243         size_t sg_chain_buffer_length;
4244         struct pqi_io_request *io_request;
4245
4246         if (!ctrl_info->io_request_pool)
4247                 return;
4248
4249         dev = &ctrl_info->pci_dev->dev;
4250         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4251         io_request = ctrl_info->io_request_pool;
4252
4253         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4254                 kfree(io_request->iu);
4255                 if (!io_request->sg_chain_buffer)
4256                         break;
4257                 dma_free_coherent(dev, sg_chain_buffer_length,
4258                         io_request->sg_chain_buffer,
4259                         io_request->sg_chain_buffer_dma_handle);
4260                 io_request++;
4261         }
4262
4263         kfree(ctrl_info->io_request_pool);
4264         ctrl_info->io_request_pool = NULL;
4265 }
4266
4267 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4268 {
4269         ctrl_info->error_buffer = dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
4270                 ctrl_info->error_buffer_length,
4271                 &ctrl_info->error_buffer_dma_handle, GFP_KERNEL);
4272
4273         if (!ctrl_info->error_buffer)
4274                 return -ENOMEM;
4275
4276         return 0;
4277 }
4278
4279 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4280 {
4281         unsigned int i;
4282         void *sg_chain_buffer;
4283         size_t sg_chain_buffer_length;
4284         dma_addr_t sg_chain_buffer_dma_handle;
4285         struct device *dev;
4286         struct pqi_io_request *io_request;
4287
4288         ctrl_info->io_request_pool = kzalloc(ctrl_info->max_io_slots *
4289                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4290
4291         if (!ctrl_info->io_request_pool) {
4292                 dev_err(&ctrl_info->pci_dev->dev,
4293                         "failed to allocate I/O request pool\n");
4294                 goto error;
4295         }
4296
4297         dev = &ctrl_info->pci_dev->dev;
4298         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4299         io_request = ctrl_info->io_request_pool;
4300
4301         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4302                 io_request->iu =
4303                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4304
4305                 if (!io_request->iu) {
4306                         dev_err(&ctrl_info->pci_dev->dev,
4307                                 "failed to allocate IU buffers\n");
4308                         goto error;
4309                 }
4310
4311                 sg_chain_buffer = dma_alloc_coherent(dev,
4312                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4313                         GFP_KERNEL);
4314
4315                 if (!sg_chain_buffer) {
4316                         dev_err(&ctrl_info->pci_dev->dev,
4317                                 "failed to allocate PQI scatter-gather chain buffers\n");
4318                         goto error;
4319                 }
4320
4321                 io_request->index = i;
4322                 io_request->sg_chain_buffer = sg_chain_buffer;
4323                 io_request->sg_chain_buffer_dma_handle =
4324                         sg_chain_buffer_dma_handle;
4325                 io_request++;
4326         }
4327
4328         return 0;
4329
4330 error:
4331         pqi_free_all_io_requests(ctrl_info);
4332
4333         return -ENOMEM;
4334 }
4335
4336 /*
4337  * Calculate required resources that are sized based on max. outstanding
4338  * requests and max. transfer size.
4339  */
4340
4341 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4342 {
4343         u32 max_transfer_size;
4344         u32 max_sg_entries;
4345
4346         ctrl_info->scsi_ml_can_queue =
4347                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4348         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4349
4350         ctrl_info->error_buffer_length =
4351                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4352
4353         if (reset_devices)
4354                 max_transfer_size = min(ctrl_info->max_transfer_size,
4355                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4356         else
4357                 max_transfer_size = min(ctrl_info->max_transfer_size,
4358                         PQI_MAX_TRANSFER_SIZE);
4359
4360         max_sg_entries = max_transfer_size / PAGE_SIZE;
4361
4362         /* +1 to cover when the buffer is not page-aligned. */
4363         max_sg_entries++;
4364
4365         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4366
4367         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4368
4369         ctrl_info->sg_chain_buffer_length =
4370                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4371                 PQI_EXTRA_SGL_MEMORY;
4372         ctrl_info->sg_tablesize = max_sg_entries;
4373         ctrl_info->max_sectors = max_transfer_size / 512;
4374 }
4375
4376 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4377 {
4378         int num_queue_groups;
4379         u16 num_elements_per_iq;
4380         u16 num_elements_per_oq;
4381
4382         if (reset_devices) {
4383                 num_queue_groups = 1;
4384         } else {
4385                 int num_cpus;
4386                 int max_queue_groups;
4387
4388                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4389                         ctrl_info->max_outbound_queues - 1);
4390                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4391
4392                 num_cpus = num_online_cpus();
4393                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4394                 num_queue_groups = min(num_queue_groups, max_queue_groups);
4395         }
4396
4397         ctrl_info->num_queue_groups = num_queue_groups;
4398         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4399
4400         /*
4401          * Make sure that the max. inbound IU length is an even multiple
4402          * of our inbound element length.
4403          */
4404         ctrl_info->max_inbound_iu_length =
4405                 (ctrl_info->max_inbound_iu_length_per_firmware /
4406                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4407                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4408
4409         num_elements_per_iq =
4410                 (ctrl_info->max_inbound_iu_length /
4411                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4412
4413         /* Add one because one element in each queue is unusable. */
4414         num_elements_per_iq++;
4415
4416         num_elements_per_iq = min(num_elements_per_iq,
4417                 ctrl_info->max_elements_per_iq);
4418
4419         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4420         num_elements_per_oq = min(num_elements_per_oq,
4421                 ctrl_info->max_elements_per_oq);
4422
4423         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4424         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4425
4426         ctrl_info->max_sg_per_iu =
4427                 ((ctrl_info->max_inbound_iu_length -
4428                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4429                 sizeof(struct pqi_sg_descriptor)) +
4430                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4431 }
4432
4433 static inline void pqi_set_sg_descriptor(
4434         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4435 {
4436         u64 address = (u64)sg_dma_address(sg);
4437         unsigned int length = sg_dma_len(sg);
4438
4439         put_unaligned_le64(address, &sg_descriptor->address);
4440         put_unaligned_le32(length, &sg_descriptor->length);
4441         put_unaligned_le32(0, &sg_descriptor->flags);
4442 }
4443
4444 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4445         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4446         struct pqi_io_request *io_request)
4447 {
4448         int i;
4449         u16 iu_length;
4450         int sg_count;
4451         bool chained;
4452         unsigned int num_sg_in_iu;
4453         unsigned int max_sg_per_iu;
4454         struct scatterlist *sg;
4455         struct pqi_sg_descriptor *sg_descriptor;
4456
4457         sg_count = scsi_dma_map(scmd);
4458         if (sg_count < 0)
4459                 return sg_count;
4460
4461         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4462                 PQI_REQUEST_HEADER_LENGTH;
4463
4464         if (sg_count == 0)
4465                 goto out;
4466
4467         sg = scsi_sglist(scmd);
4468         sg_descriptor = request->sg_descriptors;
4469         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4470         chained = false;
4471         num_sg_in_iu = 0;
4472         i = 0;
4473
4474         while (1) {
4475                 pqi_set_sg_descriptor(sg_descriptor, sg);
4476                 if (!chained)
4477                         num_sg_in_iu++;
4478                 i++;
4479                 if (i == sg_count)
4480                         break;
4481                 sg_descriptor++;
4482                 if (i == max_sg_per_iu) {
4483                         put_unaligned_le64(
4484                                 (u64)io_request->sg_chain_buffer_dma_handle,
4485                                 &sg_descriptor->address);
4486                         put_unaligned_le32((sg_count - num_sg_in_iu)
4487                                 * sizeof(*sg_descriptor),
4488                                 &sg_descriptor->length);
4489                         put_unaligned_le32(CISS_SG_CHAIN,
4490                                 &sg_descriptor->flags);
4491                         chained = true;
4492                         num_sg_in_iu++;
4493                         sg_descriptor = io_request->sg_chain_buffer;
4494                 }
4495                 sg = sg_next(sg);
4496         }
4497
4498         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4499         request->partial = chained;
4500         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4501
4502 out:
4503         put_unaligned_le16(iu_length, &request->header.iu_length);
4504
4505         return 0;
4506 }
4507
4508 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4509         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4510         struct pqi_io_request *io_request)
4511 {
4512         int i;
4513         u16 iu_length;
4514         int sg_count;
4515         bool chained;
4516         unsigned int num_sg_in_iu;
4517         unsigned int max_sg_per_iu;
4518         struct scatterlist *sg;
4519         struct pqi_sg_descriptor *sg_descriptor;
4520
4521         sg_count = scsi_dma_map(scmd);
4522         if (sg_count < 0)
4523                 return sg_count;
4524
4525         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4526                 PQI_REQUEST_HEADER_LENGTH;
4527         num_sg_in_iu = 0;
4528
4529         if (sg_count == 0)
4530                 goto out;
4531
4532         sg = scsi_sglist(scmd);
4533         sg_descriptor = request->sg_descriptors;
4534         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4535         chained = false;
4536         i = 0;
4537
4538         while (1) {
4539                 pqi_set_sg_descriptor(sg_descriptor, sg);
4540                 if (!chained)
4541                         num_sg_in_iu++;
4542                 i++;
4543                 if (i == sg_count)
4544                         break;
4545                 sg_descriptor++;
4546                 if (i == max_sg_per_iu) {
4547                         put_unaligned_le64(
4548                                 (u64)io_request->sg_chain_buffer_dma_handle,
4549                                 &sg_descriptor->address);
4550                         put_unaligned_le32((sg_count - num_sg_in_iu)
4551                                 * sizeof(*sg_descriptor),
4552                                 &sg_descriptor->length);
4553                         put_unaligned_le32(CISS_SG_CHAIN,
4554                                 &sg_descriptor->flags);
4555                         chained = true;
4556                         num_sg_in_iu++;
4557                         sg_descriptor = io_request->sg_chain_buffer;
4558                 }
4559                 sg = sg_next(sg);
4560         }
4561
4562         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4563         request->partial = chained;
4564         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4565
4566 out:
4567         put_unaligned_le16(iu_length, &request->header.iu_length);
4568         request->num_sg_descriptors = num_sg_in_iu;
4569
4570         return 0;
4571 }
4572
4573 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4574         void *context)
4575 {
4576         struct scsi_cmnd *scmd;
4577
4578         scmd = io_request->scmd;
4579         pqi_free_io_request(io_request);
4580         scsi_dma_unmap(scmd);
4581         pqi_scsi_done(scmd);
4582 }
4583
4584 static int pqi_raid_submit_scsi_cmd_with_io_request(
4585         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4586         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4587         struct pqi_queue_group *queue_group)
4588 {
4589         int rc;
4590         size_t cdb_length;
4591         struct pqi_raid_path_request *request;
4592
4593         io_request->io_complete_callback = pqi_raid_io_complete;
4594         io_request->scmd = scmd;
4595
4596         request = io_request->iu;
4597         memset(request, 0,
4598                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4599
4600         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4601         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4602         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4603         put_unaligned_le16(io_request->index, &request->request_id);
4604         request->error_index = request->request_id;
4605         memcpy(request->lun_number, device->scsi3addr,
4606                 sizeof(request->lun_number));
4607
4608         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4609         memcpy(request->cdb, scmd->cmnd, cdb_length);
4610
4611         switch (cdb_length) {
4612         case 6:
4613         case 10:
4614         case 12:
4615         case 16:
4616                 /* No bytes in the Additional CDB bytes field */
4617                 request->additional_cdb_bytes_usage =
4618                         SOP_ADDITIONAL_CDB_BYTES_0;
4619                 break;
4620         case 20:
4621                 /* 4 bytes in the Additional cdb field */
4622                 request->additional_cdb_bytes_usage =
4623                         SOP_ADDITIONAL_CDB_BYTES_4;
4624                 break;
4625         case 24:
4626                 /* 8 bytes in the Additional cdb field */
4627                 request->additional_cdb_bytes_usage =
4628                         SOP_ADDITIONAL_CDB_BYTES_8;
4629                 break;
4630         case 28:
4631                 /* 12 bytes in the Additional cdb field */
4632                 request->additional_cdb_bytes_usage =
4633                         SOP_ADDITIONAL_CDB_BYTES_12;
4634                 break;
4635         case 32:
4636         default:
4637                 /* 16 bytes in the Additional cdb field */
4638                 request->additional_cdb_bytes_usage =
4639                         SOP_ADDITIONAL_CDB_BYTES_16;
4640                 break;
4641         }
4642
4643         switch (scmd->sc_data_direction) {
4644         case DMA_TO_DEVICE:
4645                 request->data_direction = SOP_READ_FLAG;
4646                 break;
4647         case DMA_FROM_DEVICE:
4648                 request->data_direction = SOP_WRITE_FLAG;
4649                 break;
4650         case DMA_NONE:
4651                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4652                 break;
4653         case DMA_BIDIRECTIONAL:
4654                 request->data_direction = SOP_BIDIRECTIONAL;
4655                 break;
4656         default:
4657                 dev_err(&ctrl_info->pci_dev->dev,
4658                         "unknown data direction: %d\n",
4659                         scmd->sc_data_direction);
4660                 break;
4661         }
4662
4663         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
4664         if (rc) {
4665                 pqi_free_io_request(io_request);
4666                 return SCSI_MLQUEUE_HOST_BUSY;
4667         }
4668
4669         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
4670
4671         return 0;
4672 }
4673
4674 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4675         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4676         struct pqi_queue_group *queue_group)
4677 {
4678         struct pqi_io_request *io_request;
4679
4680         io_request = pqi_alloc_io_request(ctrl_info);
4681
4682         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4683                 device, scmd, queue_group);
4684 }
4685
4686 static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
4687 {
4688         if (!pqi_ctrl_blocked(ctrl_info))
4689                 schedule_work(&ctrl_info->raid_bypass_retry_work);
4690 }
4691
4692 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
4693 {
4694         struct scsi_cmnd *scmd;
4695         struct pqi_scsi_dev *device;
4696         struct pqi_ctrl_info *ctrl_info;
4697
4698         if (!io_request->raid_bypass)
4699                 return false;
4700
4701         scmd = io_request->scmd;
4702         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
4703                 return false;
4704         if (host_byte(scmd->result) == DID_NO_CONNECT)
4705                 return false;
4706
4707         device = scmd->device->hostdata;
4708         if (pqi_device_offline(device))
4709                 return false;
4710
4711         ctrl_info = shost_to_hba(scmd->device->host);
4712         if (pqi_ctrl_offline(ctrl_info))
4713                 return false;
4714
4715         return true;
4716 }
4717
4718 static inline void pqi_add_to_raid_bypass_retry_list(
4719         struct pqi_ctrl_info *ctrl_info,
4720         struct pqi_io_request *io_request, bool at_head)
4721 {
4722         unsigned long flags;
4723
4724         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4725         if (at_head)
4726                 list_add(&io_request->request_list_entry,
4727                         &ctrl_info->raid_bypass_retry_list);
4728         else
4729                 list_add_tail(&io_request->request_list_entry,
4730                         &ctrl_info->raid_bypass_retry_list);
4731         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4732 }
4733
4734 static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
4735         void *context)
4736 {
4737         struct scsi_cmnd *scmd;
4738
4739         scmd = io_request->scmd;
4740         pqi_free_io_request(io_request);
4741         pqi_scsi_done(scmd);
4742 }
4743
4744 static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
4745 {
4746         struct scsi_cmnd *scmd;
4747         struct pqi_ctrl_info *ctrl_info;
4748
4749         io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
4750         scmd = io_request->scmd;
4751         scmd->result = 0;
4752         ctrl_info = shost_to_hba(scmd->device->host);
4753
4754         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
4755         pqi_schedule_bypass_retry(ctrl_info);
4756 }
4757
4758 static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
4759 {
4760         struct scsi_cmnd *scmd;
4761         struct pqi_scsi_dev *device;
4762         struct pqi_ctrl_info *ctrl_info;
4763         struct pqi_queue_group *queue_group;
4764
4765         scmd = io_request->scmd;
4766         device = scmd->device->hostdata;
4767         if (pqi_device_in_reset(device)) {
4768                 pqi_free_io_request(io_request);
4769                 set_host_byte(scmd, DID_RESET);
4770                 pqi_scsi_done(scmd);
4771                 return 0;
4772         }
4773
4774         ctrl_info = shost_to_hba(scmd->device->host);
4775         queue_group = io_request->queue_group;
4776
4777         pqi_reinit_io_request(io_request);
4778
4779         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4780                 device, scmd, queue_group);
4781 }
4782
4783 static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
4784         struct pqi_ctrl_info *ctrl_info)
4785 {
4786         unsigned long flags;
4787         struct pqi_io_request *io_request;
4788
4789         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4790         io_request = list_first_entry_or_null(
4791                 &ctrl_info->raid_bypass_retry_list,
4792                 struct pqi_io_request, request_list_entry);
4793         if (io_request)
4794                 list_del(&io_request->request_list_entry);
4795         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4796
4797         return io_request;
4798 }
4799
4800 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
4801 {
4802         int rc;
4803         struct pqi_io_request *io_request;
4804
4805         pqi_ctrl_busy(ctrl_info);
4806
4807         while (1) {
4808                 if (pqi_ctrl_blocked(ctrl_info))
4809                         break;
4810                 io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
4811                 if (!io_request)
4812                         break;
4813                 rc = pqi_retry_raid_bypass(io_request);
4814                 if (rc) {
4815                         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
4816                                 true);
4817                         pqi_schedule_bypass_retry(ctrl_info);
4818                         break;
4819                 }
4820         }
4821
4822         pqi_ctrl_unbusy(ctrl_info);
4823 }
4824
4825 static void pqi_raid_bypass_retry_worker(struct work_struct *work)
4826 {
4827         struct pqi_ctrl_info *ctrl_info;
4828
4829         ctrl_info = container_of(work, struct pqi_ctrl_info,
4830                 raid_bypass_retry_work);
4831         pqi_retry_raid_bypass_requests(ctrl_info);
4832 }
4833
4834 static void pqi_clear_all_queued_raid_bypass_retries(
4835         struct pqi_ctrl_info *ctrl_info)
4836 {
4837         unsigned long flags;
4838
4839         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4840         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
4841         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4842 }
4843
4844 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
4845         void *context)
4846 {
4847         struct scsi_cmnd *scmd;
4848
4849         scmd = io_request->scmd;
4850         scsi_dma_unmap(scmd);
4851         if (io_request->status == -EAGAIN)
4852                 set_host_byte(scmd, DID_IMM_RETRY);
4853         else if (pqi_raid_bypass_retry_needed(io_request)) {
4854                 pqi_queue_raid_bypass_retry(io_request);
4855                 return;
4856         }
4857         pqi_free_io_request(io_request);
4858         pqi_scsi_done(scmd);
4859 }
4860
4861 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4862         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4863         struct pqi_queue_group *queue_group)
4864 {
4865         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
4866                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
4867 }
4868
4869 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
4870         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
4871         unsigned int cdb_length, struct pqi_queue_group *queue_group,
4872         struct pqi_encryption_info *encryption_info, bool raid_bypass)
4873 {
4874         int rc;
4875         struct pqi_io_request *io_request;
4876         struct pqi_aio_path_request *request;
4877
4878         io_request = pqi_alloc_io_request(ctrl_info);
4879         io_request->io_complete_callback = pqi_aio_io_complete;
4880         io_request->scmd = scmd;
4881         io_request->raid_bypass = raid_bypass;
4882
4883         request = io_request->iu;
4884         memset(request, 0,
4885                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4886
4887         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
4888         put_unaligned_le32(aio_handle, &request->nexus_id);
4889         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4890         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4891         put_unaligned_le16(io_request->index, &request->request_id);
4892         request->error_index = request->request_id;
4893         if (cdb_length > sizeof(request->cdb))
4894                 cdb_length = sizeof(request->cdb);
4895         request->cdb_length = cdb_length;
4896         memcpy(request->cdb, cdb, cdb_length);
4897
4898         switch (scmd->sc_data_direction) {
4899         case DMA_TO_DEVICE:
4900                 request->data_direction = SOP_READ_FLAG;
4901                 break;
4902         case DMA_FROM_DEVICE:
4903                 request->data_direction = SOP_WRITE_FLAG;
4904                 break;
4905         case DMA_NONE:
4906                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4907                 break;
4908         case DMA_BIDIRECTIONAL:
4909                 request->data_direction = SOP_BIDIRECTIONAL;
4910                 break;
4911         default:
4912                 dev_err(&ctrl_info->pci_dev->dev,
4913                         "unknown data direction: %d\n",
4914                         scmd->sc_data_direction);
4915                 break;
4916         }
4917
4918         if (encryption_info) {
4919                 request->encryption_enable = true;
4920                 put_unaligned_le16(encryption_info->data_encryption_key_index,
4921                         &request->data_encryption_key_index);
4922                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
4923                         &request->encrypt_tweak_lower);
4924                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
4925                         &request->encrypt_tweak_upper);
4926         }
4927
4928         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
4929         if (rc) {
4930                 pqi_free_io_request(io_request);
4931                 return SCSI_MLQUEUE_HOST_BUSY;
4932         }
4933
4934         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
4935
4936         return 0;
4937 }
4938
4939 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
4940         struct scsi_cmnd *scmd)
4941 {
4942         u16 hw_queue;
4943
4944         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
4945         if (hw_queue > ctrl_info->max_hw_queue_index)
4946                 hw_queue = 0;
4947
4948         return hw_queue;
4949 }
4950
4951 /*
4952  * This function gets called just before we hand the completed SCSI request
4953  * back to the SML.
4954  */
4955
4956 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
4957 {
4958         struct pqi_scsi_dev *device;
4959
4960         device = scmd->device->hostdata;
4961         atomic_dec(&device->scsi_cmds_outstanding);
4962 }
4963
4964 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
4965         struct scsi_cmnd *scmd)
4966 {
4967         int rc;
4968         struct pqi_ctrl_info *ctrl_info;
4969         struct pqi_scsi_dev *device;
4970         u16 hw_queue;
4971         struct pqi_queue_group *queue_group;
4972         bool raid_bypassed;
4973
4974         device = scmd->device->hostdata;
4975         ctrl_info = shost_to_hba(shost);
4976
4977         atomic_inc(&device->scsi_cmds_outstanding);
4978
4979         if (pqi_ctrl_offline(ctrl_info)) {
4980                 set_host_byte(scmd, DID_NO_CONNECT);
4981                 pqi_scsi_done(scmd);
4982                 return 0;
4983         }
4984
4985         pqi_ctrl_busy(ctrl_info);
4986         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device)) {
4987                 rc = SCSI_MLQUEUE_HOST_BUSY;
4988                 goto out;
4989         }
4990
4991         /*
4992          * This is necessary because the SML doesn't zero out this field during
4993          * error recovery.
4994          */
4995         scmd->result = 0;
4996
4997         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
4998         queue_group = &ctrl_info->queue_groups[hw_queue];
4999
5000         if (pqi_is_logical_device(device)) {
5001                 raid_bypassed = false;
5002                 if (device->raid_bypass_enabled &&
5003                                 !blk_rq_is_passthrough(scmd->request)) {
5004                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
5005                                 scmd, queue_group);
5006                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY)
5007                                 raid_bypassed = true;
5008                 }
5009                 if (!raid_bypassed)
5010                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5011                                 queue_group);
5012         } else {
5013                 if (device->aio_enabled)
5014                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
5015                                 queue_group);
5016                 else
5017                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5018                                 queue_group);
5019         }
5020
5021 out:
5022         pqi_ctrl_unbusy(ctrl_info);
5023         if (rc)
5024                 atomic_dec(&device->scsi_cmds_outstanding);
5025
5026         return rc;
5027 }
5028
5029 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
5030         struct pqi_queue_group *queue_group)
5031 {
5032         unsigned int path;
5033         unsigned long flags;
5034         bool list_is_empty;
5035
5036         for (path = 0; path < 2; path++) {
5037                 while (1) {
5038                         spin_lock_irqsave(
5039                                 &queue_group->submit_lock[path], flags);
5040                         list_is_empty =
5041                                 list_empty(&queue_group->request_list[path]);
5042                         spin_unlock_irqrestore(
5043                                 &queue_group->submit_lock[path], flags);
5044                         if (list_is_empty)
5045                                 break;
5046                         pqi_check_ctrl_health(ctrl_info);
5047                         if (pqi_ctrl_offline(ctrl_info))
5048                                 return -ENXIO;
5049                         usleep_range(1000, 2000);
5050                 }
5051         }
5052
5053         return 0;
5054 }
5055
5056 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5057 {
5058         int rc;
5059         unsigned int i;
5060         unsigned int path;
5061         struct pqi_queue_group *queue_group;
5062         pqi_index_t iq_pi;
5063         pqi_index_t iq_ci;
5064
5065         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5066                 queue_group = &ctrl_info->queue_groups[i];
5067
5068                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5069                 if (rc)
5070                         return rc;
5071
5072                 for (path = 0; path < 2; path++) {
5073                         iq_pi = queue_group->iq_pi_copy[path];
5074
5075                         while (1) {
5076                                 iq_ci = *queue_group->iq_ci[path];
5077                                 if (iq_ci == iq_pi)
5078                                         break;
5079                                 pqi_check_ctrl_health(ctrl_info);
5080                                 if (pqi_ctrl_offline(ctrl_info))
5081                                         return -ENXIO;
5082                                 usleep_range(1000, 2000);
5083                         }
5084                 }
5085         }
5086
5087         return 0;
5088 }
5089
5090 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5091         struct pqi_scsi_dev *device)
5092 {
5093         unsigned int i;
5094         unsigned int path;
5095         struct pqi_queue_group *queue_group;
5096         unsigned long flags;
5097         struct pqi_io_request *io_request;
5098         struct pqi_io_request *next;
5099         struct scsi_cmnd *scmd;
5100         struct pqi_scsi_dev *scsi_device;
5101
5102         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5103                 queue_group = &ctrl_info->queue_groups[i];
5104
5105                 for (path = 0; path < 2; path++) {
5106                         spin_lock_irqsave(
5107                                 &queue_group->submit_lock[path], flags);
5108
5109                         list_for_each_entry_safe(io_request, next,
5110                                 &queue_group->request_list[path],
5111                                 request_list_entry) {
5112                                 scmd = io_request->scmd;
5113                                 if (!scmd)
5114                                         continue;
5115
5116                                 scsi_device = scmd->device->hostdata;
5117                                 if (scsi_device != device)
5118                                         continue;
5119
5120                                 list_del(&io_request->request_list_entry);
5121                                 set_host_byte(scmd, DID_RESET);
5122                                 pqi_scsi_done(scmd);
5123                         }
5124
5125                         spin_unlock_irqrestore(
5126                                 &queue_group->submit_lock[path], flags);
5127                 }
5128         }
5129 }
5130
5131 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5132         struct pqi_scsi_dev *device)
5133 {
5134         while (atomic_read(&device->scsi_cmds_outstanding)) {
5135                 pqi_check_ctrl_health(ctrl_info);
5136                 if (pqi_ctrl_offline(ctrl_info))
5137                         return -ENXIO;
5138                 usleep_range(1000, 2000);
5139         }
5140
5141         return 0;
5142 }
5143
5144 static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info)
5145 {
5146         bool io_pending;
5147         unsigned long flags;
5148         struct pqi_scsi_dev *device;
5149
5150         while (1) {
5151                 io_pending = false;
5152
5153                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5154                 list_for_each_entry(device, &ctrl_info->scsi_device_list,
5155                         scsi_device_list_entry) {
5156                         if (atomic_read(&device->scsi_cmds_outstanding)) {
5157                                 io_pending = true;
5158                                 break;
5159                         }
5160                 }
5161                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5162                                         flags);
5163
5164                 if (!io_pending)
5165                         break;
5166
5167                 pqi_check_ctrl_health(ctrl_info);
5168                 if (pqi_ctrl_offline(ctrl_info))
5169                         return -ENXIO;
5170
5171                 usleep_range(1000, 2000);
5172         }
5173
5174         return 0;
5175 }
5176
5177 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5178         void *context)
5179 {
5180         struct completion *waiting = context;
5181
5182         complete(waiting);
5183 }
5184
5185 #define PQI_LUN_RESET_TIMEOUT_SECS      10
5186
5187 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5188         struct pqi_scsi_dev *device, struct completion *wait)
5189 {
5190         int rc;
5191
5192         while (1) {
5193                 if (wait_for_completion_io_timeout(wait,
5194                         PQI_LUN_RESET_TIMEOUT_SECS * HZ)) {
5195                         rc = 0;
5196                         break;
5197                 }
5198
5199                 pqi_check_ctrl_health(ctrl_info);
5200                 if (pqi_ctrl_offline(ctrl_info)) {
5201                         rc = -ENXIO;
5202                         break;
5203                 }
5204         }
5205
5206         return rc;
5207 }
5208
5209 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5210         struct pqi_scsi_dev *device)
5211 {
5212         int rc;
5213         struct pqi_io_request *io_request;
5214         DECLARE_COMPLETION_ONSTACK(wait);
5215         struct pqi_task_management_request *request;
5216
5217         io_request = pqi_alloc_io_request(ctrl_info);
5218         io_request->io_complete_callback = pqi_lun_reset_complete;
5219         io_request->context = &wait;
5220
5221         request = io_request->iu;
5222         memset(request, 0, sizeof(*request));
5223
5224         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5225         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5226                 &request->header.iu_length);
5227         put_unaligned_le16(io_request->index, &request->request_id);
5228         memcpy(request->lun_number, device->scsi3addr,
5229                 sizeof(request->lun_number));
5230         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5231
5232         pqi_start_io(ctrl_info,
5233                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5234                 io_request);
5235
5236         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5237         if (rc == 0)
5238                 rc = io_request->status;
5239
5240         pqi_free_io_request(io_request);
5241
5242         return rc;
5243 }
5244
5245 /* Performs a reset at the LUN level. */
5246
5247 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5248         struct pqi_scsi_dev *device)
5249 {
5250         int rc;
5251
5252         rc = pqi_lun_reset(ctrl_info, device);
5253         if (rc == 0)
5254                 rc = pqi_device_wait_for_pending_io(ctrl_info, device);
5255
5256         return rc == 0 ? SUCCESS : FAILED;
5257 }
5258
5259 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5260 {
5261         int rc;
5262         struct Scsi_Host *shost;
5263         struct pqi_ctrl_info *ctrl_info;
5264         struct pqi_scsi_dev *device;
5265
5266         shost = scmd->device->host;
5267         ctrl_info = shost_to_hba(shost);
5268         device = scmd->device->hostdata;
5269
5270         dev_err(&ctrl_info->pci_dev->dev,
5271                 "resetting scsi %d:%d:%d:%d\n",
5272                 shost->host_no, device->bus, device->target, device->lun);
5273
5274         pqi_check_ctrl_health(ctrl_info);
5275         if (pqi_ctrl_offline(ctrl_info)) {
5276                 rc = FAILED;
5277                 goto out;
5278         }
5279
5280         mutex_lock(&ctrl_info->lun_reset_mutex);
5281
5282         pqi_ctrl_block_requests(ctrl_info);
5283         pqi_ctrl_wait_until_quiesced(ctrl_info);
5284         pqi_fail_io_queued_for_device(ctrl_info, device);
5285         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5286         pqi_device_reset_start(device);
5287         pqi_ctrl_unblock_requests(ctrl_info);
5288
5289         if (rc)
5290                 rc = FAILED;
5291         else
5292                 rc = pqi_device_reset(ctrl_info, device);
5293
5294         pqi_device_reset_done(device);
5295
5296         mutex_unlock(&ctrl_info->lun_reset_mutex);
5297
5298 out:
5299         dev_err(&ctrl_info->pci_dev->dev,
5300                 "reset of scsi %d:%d:%d:%d: %s\n",
5301                 shost->host_no, device->bus, device->target, device->lun,
5302                 rc == SUCCESS ? "SUCCESS" : "FAILED");
5303
5304         return rc;
5305 }
5306
5307 static int pqi_slave_alloc(struct scsi_device *sdev)
5308 {
5309         struct pqi_scsi_dev *device;
5310         unsigned long flags;
5311         struct pqi_ctrl_info *ctrl_info;
5312         struct scsi_target *starget;
5313         struct sas_rphy *rphy;
5314
5315         ctrl_info = shost_to_hba(sdev->host);
5316
5317         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5318
5319         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5320                 starget = scsi_target(sdev);
5321                 rphy = target_to_rphy(starget);
5322                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5323                 if (device) {
5324                         device->target = sdev_id(sdev);
5325                         device->lun = sdev->lun;
5326                         device->target_lun_valid = true;
5327                 }
5328         } else {
5329                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5330                         sdev_id(sdev), sdev->lun);
5331         }
5332
5333         if (device) {
5334                 sdev->hostdata = device;
5335                 device->sdev = sdev;
5336                 if (device->queue_depth) {
5337                         device->advertised_queue_depth = device->queue_depth;
5338                         scsi_change_queue_depth(sdev,
5339                                 device->advertised_queue_depth);
5340                 }
5341         }
5342
5343         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5344
5345         return 0;
5346 }
5347
5348 static int pqi_map_queues(struct Scsi_Host *shost)
5349 {
5350         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5351
5352         return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev);
5353 }
5354
5355 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
5356         void __user *arg)
5357 {
5358         struct pci_dev *pci_dev;
5359         u32 subsystem_vendor;
5360         u32 subsystem_device;
5361         cciss_pci_info_struct pciinfo;
5362
5363         if (!arg)
5364                 return -EINVAL;
5365
5366         pci_dev = ctrl_info->pci_dev;
5367
5368         pciinfo.domain = pci_domain_nr(pci_dev->bus);
5369         pciinfo.bus = pci_dev->bus->number;
5370         pciinfo.dev_fn = pci_dev->devfn;
5371         subsystem_vendor = pci_dev->subsystem_vendor;
5372         subsystem_device = pci_dev->subsystem_device;
5373         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
5374                 subsystem_vendor;
5375
5376         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5377                 return -EFAULT;
5378
5379         return 0;
5380 }
5381
5382 static int pqi_getdrivver_ioctl(void __user *arg)
5383 {
5384         u32 version;
5385
5386         if (!arg)
5387                 return -EINVAL;
5388
5389         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5390                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
5391
5392         if (copy_to_user(arg, &version, sizeof(version)))
5393                 return -EFAULT;
5394
5395         return 0;
5396 }
5397
5398 struct ciss_error_info {
5399         u8      scsi_status;
5400         int     command_status;
5401         size_t  sense_data_length;
5402 };
5403
5404 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5405         struct ciss_error_info *ciss_error_info)
5406 {
5407         int ciss_cmd_status;
5408         size_t sense_data_length;
5409
5410         switch (pqi_error_info->data_out_result) {
5411         case PQI_DATA_IN_OUT_GOOD:
5412                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5413                 break;
5414         case PQI_DATA_IN_OUT_UNDERFLOW:
5415                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5416                 break;
5417         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5418                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5419                 break;
5420         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5421         case PQI_DATA_IN_OUT_BUFFER_ERROR:
5422         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5423         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5424         case PQI_DATA_IN_OUT_ERROR:
5425                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5426                 break;
5427         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5428         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5429         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5430         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5431         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5432         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5433         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5434         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5435         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5436         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5437                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5438                 break;
5439         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5440                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5441                 break;
5442         case PQI_DATA_IN_OUT_ABORTED:
5443                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5444                 break;
5445         case PQI_DATA_IN_OUT_TIMEOUT:
5446                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5447                 break;
5448         default:
5449                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5450                 break;
5451         }
5452
5453         sense_data_length =
5454                 get_unaligned_le16(&pqi_error_info->sense_data_length);
5455         if (sense_data_length == 0)
5456                 sense_data_length =
5457                 get_unaligned_le16(&pqi_error_info->response_data_length);
5458         if (sense_data_length)
5459                 if (sense_data_length > sizeof(pqi_error_info->data))
5460                         sense_data_length = sizeof(pqi_error_info->data);
5461
5462         ciss_error_info->scsi_status = pqi_error_info->status;
5463         ciss_error_info->command_status = ciss_cmd_status;
5464         ciss_error_info->sense_data_length = sense_data_length;
5465 }
5466
5467 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5468 {
5469         int rc;
5470         char *kernel_buffer = NULL;
5471         u16 iu_length;
5472         size_t sense_data_length;
5473         IOCTL_Command_struct iocommand;
5474         struct pqi_raid_path_request request;
5475         struct pqi_raid_error_info pqi_error_info;
5476         struct ciss_error_info ciss_error_info;
5477
5478         if (pqi_ctrl_offline(ctrl_info))
5479                 return -ENXIO;
5480         if (!arg)
5481                 return -EINVAL;
5482         if (!capable(CAP_SYS_RAWIO))
5483                 return -EPERM;
5484         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5485                 return -EFAULT;
5486         if (iocommand.buf_size < 1 &&
5487                 iocommand.Request.Type.Direction != XFER_NONE)
5488                 return -EINVAL;
5489         if (iocommand.Request.CDBLen > sizeof(request.cdb))
5490                 return -EINVAL;
5491         if (iocommand.Request.Type.Type != TYPE_CMD)
5492                 return -EINVAL;
5493
5494         switch (iocommand.Request.Type.Direction) {
5495         case XFER_NONE:
5496         case XFER_WRITE:
5497         case XFER_READ:
5498         case XFER_READ | XFER_WRITE:
5499                 break;
5500         default:
5501                 return -EINVAL;
5502         }
5503
5504         if (iocommand.buf_size > 0) {
5505                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
5506                 if (!kernel_buffer)
5507                         return -ENOMEM;
5508                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
5509                         if (copy_from_user(kernel_buffer, iocommand.buf,
5510                                 iocommand.buf_size)) {
5511                                 rc = -EFAULT;
5512                                 goto out;
5513                         }
5514                 } else {
5515                         memset(kernel_buffer, 0, iocommand.buf_size);
5516                 }
5517         }
5518
5519         memset(&request, 0, sizeof(request));
5520
5521         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5522         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5523                 PQI_REQUEST_HEADER_LENGTH;
5524         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
5525                 sizeof(request.lun_number));
5526         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
5527         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5528
5529         switch (iocommand.Request.Type.Direction) {
5530         case XFER_NONE:
5531                 request.data_direction = SOP_NO_DIRECTION_FLAG;
5532                 break;
5533         case XFER_WRITE:
5534                 request.data_direction = SOP_WRITE_FLAG;
5535                 break;
5536         case XFER_READ:
5537                 request.data_direction = SOP_READ_FLAG;
5538                 break;
5539         case XFER_READ | XFER_WRITE:
5540                 request.data_direction = SOP_BIDIRECTIONAL;
5541                 break;
5542         }
5543
5544         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5545
5546         if (iocommand.buf_size > 0) {
5547                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
5548
5549                 rc = pqi_map_single(ctrl_info->pci_dev,
5550                         &request.sg_descriptors[0], kernel_buffer,
5551                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
5552                 if (rc)
5553                         goto out;
5554
5555                 iu_length += sizeof(request.sg_descriptors[0]);
5556         }
5557
5558         put_unaligned_le16(iu_length, &request.header.iu_length);
5559
5560         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
5561                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
5562
5563         if (iocommand.buf_size > 0)
5564                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
5565                         PCI_DMA_BIDIRECTIONAL);
5566
5567         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
5568
5569         if (rc == 0) {
5570                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
5571                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
5572                 iocommand.error_info.CommandStatus =
5573                         ciss_error_info.command_status;
5574                 sense_data_length = ciss_error_info.sense_data_length;
5575                 if (sense_data_length) {
5576                         if (sense_data_length >
5577                                 sizeof(iocommand.error_info.SenseInfo))
5578                                 sense_data_length =
5579                                         sizeof(iocommand.error_info.SenseInfo);
5580                         memcpy(iocommand.error_info.SenseInfo,
5581                                 pqi_error_info.data, sense_data_length);
5582                         iocommand.error_info.SenseLen = sense_data_length;
5583                 }
5584         }
5585
5586         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
5587                 rc = -EFAULT;
5588                 goto out;
5589         }
5590
5591         if (rc == 0 && iocommand.buf_size > 0 &&
5592                 (iocommand.Request.Type.Direction & XFER_READ)) {
5593                 if (copy_to_user(iocommand.buf, kernel_buffer,
5594                         iocommand.buf_size)) {
5595                         rc = -EFAULT;
5596                 }
5597         }
5598
5599 out:
5600         kfree(kernel_buffer);
5601
5602         return rc;
5603 }
5604
5605 static int pqi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
5606 {
5607         int rc;
5608         struct pqi_ctrl_info *ctrl_info;
5609
5610         ctrl_info = shost_to_hba(sdev->host);
5611
5612         switch (cmd) {
5613         case CCISS_DEREGDISK:
5614         case CCISS_REGNEWDISK:
5615         case CCISS_REGNEWD:
5616                 rc = pqi_scan_scsi_devices(ctrl_info);
5617                 break;
5618         case CCISS_GETPCIINFO:
5619                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
5620                 break;
5621         case CCISS_GETDRIVVER:
5622                 rc = pqi_getdrivver_ioctl(arg);
5623                 break;
5624         case CCISS_PASSTHRU:
5625                 rc = pqi_passthru_ioctl(ctrl_info, arg);
5626                 break;
5627         default:
5628                 rc = -EINVAL;
5629                 break;
5630         }
5631
5632         return rc;
5633 }
5634
5635 static ssize_t pqi_version_show(struct device *dev,
5636         struct device_attribute *attr, char *buffer)
5637 {
5638         ssize_t count = 0;
5639         struct Scsi_Host *shost;
5640         struct pqi_ctrl_info *ctrl_info;
5641
5642         shost = class_to_shost(dev);
5643         ctrl_info = shost_to_hba(shost);
5644
5645         count += snprintf(buffer + count, PAGE_SIZE - count,
5646                 "  driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
5647
5648         count += snprintf(buffer + count, PAGE_SIZE - count,
5649                 "firmware: %s\n", ctrl_info->firmware_version);
5650
5651         return count;
5652 }
5653
5654 static ssize_t pqi_host_rescan_store(struct device *dev,
5655         struct device_attribute *attr, const char *buffer, size_t count)
5656 {
5657         struct Scsi_Host *shost = class_to_shost(dev);
5658
5659         pqi_scan_start(shost);
5660
5661         return count;
5662 }
5663
5664 static ssize_t pqi_lockup_action_show(struct device *dev,
5665         struct device_attribute *attr, char *buffer)
5666 {
5667         int count = 0;
5668         unsigned int i;
5669
5670         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5671                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
5672                         count += snprintf(buffer + count, PAGE_SIZE - count,
5673                                 "[%s] ", pqi_lockup_actions[i].name);
5674                 else
5675                         count += snprintf(buffer + count, PAGE_SIZE - count,
5676                                 "%s ", pqi_lockup_actions[i].name);
5677         }
5678
5679         count += snprintf(buffer + count, PAGE_SIZE - count, "\n");
5680
5681         return count;
5682 }
5683
5684 static ssize_t pqi_lockup_action_store(struct device *dev,
5685         struct device_attribute *attr, const char *buffer, size_t count)
5686 {
5687         unsigned int i;
5688         char *action_name;
5689         char action_name_buffer[32];
5690
5691         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
5692         action_name = strstrip(action_name_buffer);
5693
5694         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5695                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
5696                         pqi_lockup_action = pqi_lockup_actions[i].action;
5697                         return count;
5698                 }
5699         }
5700
5701         return -EINVAL;
5702 }
5703
5704 static DEVICE_ATTR(version, 0444, pqi_version_show, NULL);
5705 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
5706 static DEVICE_ATTR(lockup_action, 0644,
5707         pqi_lockup_action_show, pqi_lockup_action_store);
5708
5709 static struct device_attribute *pqi_shost_attrs[] = {
5710         &dev_attr_version,
5711         &dev_attr_rescan,
5712         &dev_attr_lockup_action,
5713         NULL
5714 };
5715
5716 static ssize_t pqi_sas_address_show(struct device *dev,
5717         struct device_attribute *attr, char *buffer)
5718 {
5719         struct pqi_ctrl_info *ctrl_info;
5720         struct scsi_device *sdev;
5721         struct pqi_scsi_dev *device;
5722         unsigned long flags;
5723         u64 sas_address;
5724
5725         sdev = to_scsi_device(dev);
5726         ctrl_info = shost_to_hba(sdev->host);
5727
5728         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5729
5730         device = sdev->hostdata;
5731         if (pqi_is_logical_device(device)) {
5732                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5733                         flags);
5734                 return -ENODEV;
5735         }
5736         sas_address = device->sas_address;
5737
5738         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5739
5740         return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
5741 }
5742
5743 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
5744         struct device_attribute *attr, char *buffer)
5745 {
5746         struct pqi_ctrl_info *ctrl_info;
5747         struct scsi_device *sdev;
5748         struct pqi_scsi_dev *device;
5749         unsigned long flags;
5750
5751         sdev = to_scsi_device(dev);
5752         ctrl_info = shost_to_hba(sdev->host);
5753
5754         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5755
5756         device = sdev->hostdata;
5757         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
5758         buffer[1] = '\n';
5759         buffer[2] = '\0';
5760
5761         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5762
5763         return 2;
5764 }
5765
5766 static ssize_t pqi_raid_level_show(struct device *dev,
5767         struct device_attribute *attr, char *buffer)
5768 {
5769         struct pqi_ctrl_info *ctrl_info;
5770         struct scsi_device *sdev;
5771         struct pqi_scsi_dev *device;
5772         unsigned long flags;
5773         char *raid_level;
5774
5775         sdev = to_scsi_device(dev);
5776         ctrl_info = shost_to_hba(sdev->host);
5777
5778         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5779
5780         device = sdev->hostdata;
5781
5782         if (pqi_is_logical_device(device))
5783                 raid_level = pqi_raid_level_to_string(device->raid_level);
5784         else
5785                 raid_level = "N/A";
5786
5787         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5788
5789         return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
5790 }
5791
5792 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
5793 static DEVICE_ATTR(ssd_smart_path_enabled, 0444,
5794         pqi_ssd_smart_path_enabled_show, NULL);
5795 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
5796
5797 static struct device_attribute *pqi_sdev_attrs[] = {
5798         &dev_attr_sas_address,
5799         &dev_attr_ssd_smart_path_enabled,
5800         &dev_attr_raid_level,
5801         NULL
5802 };
5803
5804 static struct scsi_host_template pqi_driver_template = {
5805         .module = THIS_MODULE,
5806         .name = DRIVER_NAME_SHORT,
5807         .proc_name = DRIVER_NAME_SHORT,
5808         .queuecommand = pqi_scsi_queue_command,
5809         .scan_start = pqi_scan_start,
5810         .scan_finished = pqi_scan_finished,
5811         .this_id = -1,
5812         .use_clustering = ENABLE_CLUSTERING,
5813         .eh_device_reset_handler = pqi_eh_device_reset_handler,
5814         .ioctl = pqi_ioctl,
5815         .slave_alloc = pqi_slave_alloc,
5816         .map_queues = pqi_map_queues,
5817         .sdev_attrs = pqi_sdev_attrs,
5818         .shost_attrs = pqi_shost_attrs,
5819 };
5820
5821 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
5822 {
5823         int rc;
5824         struct Scsi_Host *shost;
5825
5826         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
5827         if (!shost) {
5828                 dev_err(&ctrl_info->pci_dev->dev,
5829                         "scsi_host_alloc failed for controller %u\n",
5830                         ctrl_info->ctrl_id);
5831                 return -ENOMEM;
5832         }
5833
5834         shost->io_port = 0;
5835         shost->n_io_port = 0;
5836         shost->this_id = -1;
5837         shost->max_channel = PQI_MAX_BUS;
5838         shost->max_cmd_len = MAX_COMMAND_SIZE;
5839         shost->max_lun = ~0;
5840         shost->max_id = ~0;
5841         shost->max_sectors = ctrl_info->max_sectors;
5842         shost->can_queue = ctrl_info->scsi_ml_can_queue;
5843         shost->cmd_per_lun = shost->can_queue;
5844         shost->sg_tablesize = ctrl_info->sg_tablesize;
5845         shost->transportt = pqi_sas_transport_template;
5846         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
5847         shost->unique_id = shost->irq;
5848         shost->nr_hw_queues = ctrl_info->num_queue_groups;
5849         shost->hostdata[0] = (unsigned long)ctrl_info;
5850
5851         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
5852         if (rc) {
5853                 dev_err(&ctrl_info->pci_dev->dev,
5854                         "scsi_add_host failed for controller %u\n",
5855                         ctrl_info->ctrl_id);
5856                 goto free_host;
5857         }
5858
5859         rc = pqi_add_sas_host(shost, ctrl_info);
5860         if (rc) {
5861                 dev_err(&ctrl_info->pci_dev->dev,
5862                         "add SAS host failed for controller %u\n",
5863                         ctrl_info->ctrl_id);
5864                 goto remove_host;
5865         }
5866
5867         ctrl_info->scsi_host = shost;
5868
5869         return 0;
5870
5871 remove_host:
5872         scsi_remove_host(shost);
5873 free_host:
5874         scsi_host_put(shost);
5875
5876         return rc;
5877 }
5878
5879 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
5880 {
5881         struct Scsi_Host *shost;
5882
5883         pqi_delete_sas_host(ctrl_info);
5884
5885         shost = ctrl_info->scsi_host;
5886         if (!shost)
5887                 return;
5888
5889         scsi_remove_host(shost);
5890         scsi_host_put(shost);
5891 }
5892
5893 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
5894 {
5895         int rc = 0;
5896         struct pqi_device_registers __iomem *pqi_registers;
5897         unsigned long timeout;
5898         unsigned int timeout_msecs;
5899         union pqi_reset_register reset_reg;
5900
5901         pqi_registers = ctrl_info->pqi_registers;
5902         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
5903         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
5904
5905         while (1) {
5906                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
5907                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
5908                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
5909                         break;
5910                 pqi_check_ctrl_health(ctrl_info);
5911                 if (pqi_ctrl_offline(ctrl_info)) {
5912                         rc = -ENXIO;
5913                         break;
5914                 }
5915                 if (time_after(jiffies, timeout)) {
5916                         rc = -ETIMEDOUT;
5917                         break;
5918                 }
5919         }
5920
5921         return rc;
5922 }
5923
5924 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
5925 {
5926         int rc;
5927         union pqi_reset_register reset_reg;
5928
5929         if (ctrl_info->pqi_reset_quiesce_supported) {
5930                 rc = sis_pqi_reset_quiesce(ctrl_info);
5931                 if (rc) {
5932                         dev_err(&ctrl_info->pci_dev->dev,
5933                                 "PQI reset failed during quiesce with error %d\n",
5934                                 rc);
5935                         return rc;
5936                 }
5937         }
5938
5939         reset_reg.all_bits = 0;
5940         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
5941         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
5942
5943         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
5944
5945         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
5946         if (rc)
5947                 dev_err(&ctrl_info->pci_dev->dev,
5948                         "PQI reset failed with error %d\n", rc);
5949
5950         return rc;
5951 }
5952
5953 static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
5954 {
5955         int rc;
5956         struct bmic_identify_controller *identify;
5957
5958         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
5959         if (!identify)
5960                 return -ENOMEM;
5961
5962         rc = pqi_identify_controller(ctrl_info, identify);
5963         if (rc)
5964                 goto out;
5965
5966         memcpy(ctrl_info->firmware_version, identify->firmware_version,
5967                 sizeof(identify->firmware_version));
5968         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
5969         snprintf(ctrl_info->firmware_version +
5970                 strlen(ctrl_info->firmware_version),
5971                 sizeof(ctrl_info->firmware_version),
5972                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
5973
5974 out:
5975         kfree(identify);
5976
5977         return rc;
5978 }
5979
5980 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
5981 {
5982         u32 table_length;
5983         u32 section_offset;
5984         void __iomem *table_iomem_addr;
5985         struct pqi_config_table *config_table;
5986         struct pqi_config_table_section_header *section;
5987
5988         table_length = ctrl_info->config_table_length;
5989
5990         config_table = kmalloc(table_length, GFP_KERNEL);
5991         if (!config_table) {
5992                 dev_err(&ctrl_info->pci_dev->dev,
5993                         "failed to allocate memory for PQI configuration table\n");
5994                 return -ENOMEM;
5995         }
5996
5997         /*
5998          * Copy the config table contents from I/O memory space into the
5999          * temporary buffer.
6000          */
6001         table_iomem_addr = ctrl_info->iomem_base +
6002                 ctrl_info->config_table_offset;
6003         memcpy_fromio(config_table, table_iomem_addr, table_length);
6004
6005         section_offset =
6006                 get_unaligned_le32(&config_table->first_section_offset);
6007
6008         while (section_offset) {
6009                 section = (void *)config_table + section_offset;
6010
6011                 switch (get_unaligned_le16(&section->section_id)) {
6012                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
6013                         if (pqi_disable_heartbeat)
6014                                 dev_warn(&ctrl_info->pci_dev->dev,
6015                                 "heartbeat disabled by module parameter\n");
6016                         else
6017                                 ctrl_info->heartbeat_counter =
6018                                         table_iomem_addr +
6019                                         section_offset +
6020                                         offsetof(
6021                                         struct pqi_config_table_heartbeat,
6022                                                 heartbeat_counter);
6023                         break;
6024                 }
6025
6026                 section_offset =
6027                         get_unaligned_le16(&section->next_section_offset);
6028         }
6029
6030         kfree(config_table);
6031
6032         return 0;
6033 }
6034
6035 /* Switches the controller from PQI mode back into SIS mode. */
6036
6037 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
6038 {
6039         int rc;
6040
6041         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
6042         rc = pqi_reset(ctrl_info);
6043         if (rc)
6044                 return rc;
6045         rc = sis_reenable_sis_mode(ctrl_info);
6046         if (rc) {
6047                 dev_err(&ctrl_info->pci_dev->dev,
6048                         "re-enabling SIS mode failed with error %d\n", rc);
6049                 return rc;
6050         }
6051         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6052
6053         return 0;
6054 }
6055
6056 /*
6057  * If the controller isn't already in SIS mode, this function forces it into
6058  * SIS mode.
6059  */
6060
6061 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
6062 {
6063         if (!sis_is_firmware_running(ctrl_info))
6064                 return -ENXIO;
6065
6066         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
6067                 return 0;
6068
6069         if (sis_is_kernel_up(ctrl_info)) {
6070                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6071                 return 0;
6072         }
6073
6074         return pqi_revert_to_sis_mode(ctrl_info);
6075 }
6076
6077 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
6078 {
6079         int rc;
6080
6081         rc = pqi_force_sis_mode(ctrl_info);
6082         if (rc)
6083                 return rc;
6084
6085         /*
6086          * Wait until the controller is ready to start accepting SIS
6087          * commands.
6088          */
6089         rc = sis_wait_for_ctrl_ready(ctrl_info);
6090         if (rc)
6091                 return rc;
6092
6093         /*
6094          * Get the controller properties.  This allows us to determine
6095          * whether or not it supports PQI mode.
6096          */
6097         rc = sis_get_ctrl_properties(ctrl_info);
6098         if (rc) {
6099                 dev_err(&ctrl_info->pci_dev->dev,
6100                         "error obtaining controller properties\n");
6101                 return rc;
6102         }
6103
6104         rc = sis_get_pqi_capabilities(ctrl_info);
6105         if (rc) {
6106                 dev_err(&ctrl_info->pci_dev->dev,
6107                         "error obtaining controller capabilities\n");
6108                 return rc;
6109         }
6110
6111         if (reset_devices) {
6112                 if (ctrl_info->max_outstanding_requests >
6113                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
6114                         ctrl_info->max_outstanding_requests =
6115                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
6116         } else {
6117                 if (ctrl_info->max_outstanding_requests >
6118                         PQI_MAX_OUTSTANDING_REQUESTS)
6119                         ctrl_info->max_outstanding_requests =
6120                                         PQI_MAX_OUTSTANDING_REQUESTS;
6121         }
6122
6123         pqi_calculate_io_resources(ctrl_info);
6124
6125         rc = pqi_alloc_error_buffer(ctrl_info);
6126         if (rc) {
6127                 dev_err(&ctrl_info->pci_dev->dev,
6128                         "failed to allocate PQI error buffer\n");
6129                 return rc;
6130         }
6131
6132         /*
6133          * If the function we are about to call succeeds, the
6134          * controller will transition from legacy SIS mode
6135          * into PQI mode.
6136          */
6137         rc = sis_init_base_struct_addr(ctrl_info);
6138         if (rc) {
6139                 dev_err(&ctrl_info->pci_dev->dev,
6140                         "error initializing PQI mode\n");
6141                 return rc;
6142         }
6143
6144         /* Wait for the controller to complete the SIS -> PQI transition. */
6145         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6146         if (rc) {
6147                 dev_err(&ctrl_info->pci_dev->dev,
6148                         "transition to PQI mode failed\n");
6149                 return rc;
6150         }
6151
6152         /* From here on, we are running in PQI mode. */
6153         ctrl_info->pqi_mode_enabled = true;
6154         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6155
6156         rc = pqi_process_config_table(ctrl_info);
6157         if (rc)
6158                 return rc;
6159
6160         rc = pqi_alloc_admin_queues(ctrl_info);
6161         if (rc) {
6162                 dev_err(&ctrl_info->pci_dev->dev,
6163                         "failed to allocate admin queues\n");
6164                 return rc;
6165         }
6166
6167         rc = pqi_create_admin_queues(ctrl_info);
6168         if (rc) {
6169                 dev_err(&ctrl_info->pci_dev->dev,
6170                         "error creating admin queues\n");
6171                 return rc;
6172         }
6173
6174         rc = pqi_report_device_capability(ctrl_info);
6175         if (rc) {
6176                 dev_err(&ctrl_info->pci_dev->dev,
6177                         "obtaining device capability failed\n");
6178                 return rc;
6179         }
6180
6181         rc = pqi_validate_device_capability(ctrl_info);
6182         if (rc)
6183                 return rc;
6184
6185         pqi_calculate_queue_resources(ctrl_info);
6186
6187         rc = pqi_enable_msix_interrupts(ctrl_info);
6188         if (rc)
6189                 return rc;
6190
6191         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
6192                 ctrl_info->max_msix_vectors =
6193                         ctrl_info->num_msix_vectors_enabled;
6194                 pqi_calculate_queue_resources(ctrl_info);
6195         }
6196
6197         rc = pqi_alloc_io_resources(ctrl_info);
6198         if (rc)
6199                 return rc;
6200
6201         rc = pqi_alloc_operational_queues(ctrl_info);
6202         if (rc) {
6203                 dev_err(&ctrl_info->pci_dev->dev,
6204                         "failed to allocate operational queues\n");
6205                 return rc;
6206         }
6207
6208         pqi_init_operational_queues(ctrl_info);
6209
6210         rc = pqi_request_irqs(ctrl_info);
6211         if (rc)
6212                 return rc;
6213
6214         rc = pqi_create_queues(ctrl_info);
6215         if (rc)
6216                 return rc;
6217
6218         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6219
6220         ctrl_info->controller_online = true;
6221         pqi_start_heartbeat_timer(ctrl_info);
6222
6223         rc = pqi_enable_events(ctrl_info);
6224         if (rc) {
6225                 dev_err(&ctrl_info->pci_dev->dev,
6226                         "error enabling events\n");
6227                 return rc;
6228         }
6229
6230         /* Register with the SCSI subsystem. */
6231         rc = pqi_register_scsi(ctrl_info);
6232         if (rc)
6233                 return rc;
6234
6235         rc = pqi_get_ctrl_firmware_version(ctrl_info);
6236         if (rc) {
6237                 dev_err(&ctrl_info->pci_dev->dev,
6238                         "error obtaining firmware version\n");
6239                 return rc;
6240         }
6241
6242         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6243         if (rc) {
6244                 dev_err(&ctrl_info->pci_dev->dev,
6245                         "error updating host wellness\n");
6246                 return rc;
6247         }
6248
6249         pqi_schedule_update_time_worker(ctrl_info);
6250
6251         pqi_scan_scsi_devices(ctrl_info);
6252
6253         return 0;
6254 }
6255
6256 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
6257 {
6258         unsigned int i;
6259         struct pqi_admin_queues *admin_queues;
6260         struct pqi_event_queue *event_queue;
6261
6262         admin_queues = &ctrl_info->admin_queues;
6263         admin_queues->iq_pi_copy = 0;
6264         admin_queues->oq_ci_copy = 0;
6265         *admin_queues->oq_pi = 0;
6266
6267         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6268                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
6269                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
6270                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
6271
6272                 *ctrl_info->queue_groups[i].iq_ci[RAID_PATH] = 0;
6273                 *ctrl_info->queue_groups[i].iq_ci[AIO_PATH] = 0;
6274                 *ctrl_info->queue_groups[i].oq_pi = 0;
6275         }
6276
6277         event_queue = &ctrl_info->event_queue;
6278         *event_queue->oq_pi = 0;
6279         event_queue->oq_ci_copy = 0;
6280 }
6281
6282 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
6283 {
6284         int rc;
6285
6286         rc = pqi_force_sis_mode(ctrl_info);
6287         if (rc)
6288                 return rc;
6289
6290         /*
6291          * Wait until the controller is ready to start accepting SIS
6292          * commands.
6293          */
6294         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
6295         if (rc)
6296                 return rc;
6297
6298         /*
6299          * If the function we are about to call succeeds, the
6300          * controller will transition from legacy SIS mode
6301          * into PQI mode.
6302          */
6303         rc = sis_init_base_struct_addr(ctrl_info);
6304         if (rc) {
6305                 dev_err(&ctrl_info->pci_dev->dev,
6306                         "error initializing PQI mode\n");
6307                 return rc;
6308         }
6309
6310         /* Wait for the controller to complete the SIS -> PQI transition. */
6311         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6312         if (rc) {
6313                 dev_err(&ctrl_info->pci_dev->dev,
6314                         "transition to PQI mode failed\n");
6315                 return rc;
6316         }
6317
6318         /* From here on, we are running in PQI mode. */
6319         ctrl_info->pqi_mode_enabled = true;
6320         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6321
6322         pqi_reinit_queues(ctrl_info);
6323
6324         rc = pqi_create_admin_queues(ctrl_info);
6325         if (rc) {
6326                 dev_err(&ctrl_info->pci_dev->dev,
6327                         "error creating admin queues\n");
6328                 return rc;
6329         }
6330
6331         rc = pqi_create_queues(ctrl_info);
6332         if (rc)
6333                 return rc;
6334
6335         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6336
6337         ctrl_info->controller_online = true;
6338         pqi_start_heartbeat_timer(ctrl_info);
6339         pqi_ctrl_unblock_requests(ctrl_info);
6340
6341         rc = pqi_enable_events(ctrl_info);
6342         if (rc) {
6343                 dev_err(&ctrl_info->pci_dev->dev,
6344                         "error enabling events\n");
6345                 return rc;
6346         }
6347
6348         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6349         if (rc) {
6350                 dev_err(&ctrl_info->pci_dev->dev,
6351                         "error updating host wellness\n");
6352                 return rc;
6353         }
6354
6355         pqi_schedule_update_time_worker(ctrl_info);
6356
6357         pqi_scan_scsi_devices(ctrl_info);
6358
6359         return 0;
6360 }
6361
6362 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
6363         u16 timeout)
6364 {
6365         return pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
6366                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
6367 }
6368
6369 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
6370 {
6371         int rc;
6372         u64 mask;
6373
6374         rc = pci_enable_device(ctrl_info->pci_dev);
6375         if (rc) {
6376                 dev_err(&ctrl_info->pci_dev->dev,
6377                         "failed to enable PCI device\n");
6378                 return rc;
6379         }
6380
6381         if (sizeof(dma_addr_t) > 4)
6382                 mask = DMA_BIT_MASK(64);
6383         else
6384                 mask = DMA_BIT_MASK(32);
6385
6386         rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask);
6387         if (rc) {
6388                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
6389                 goto disable_device;
6390         }
6391
6392         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
6393         if (rc) {
6394                 dev_err(&ctrl_info->pci_dev->dev,
6395                         "failed to obtain PCI resources\n");
6396                 goto disable_device;
6397         }
6398
6399         ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
6400                 ctrl_info->pci_dev, 0),
6401                 sizeof(struct pqi_ctrl_registers));
6402         if (!ctrl_info->iomem_base) {
6403                 dev_err(&ctrl_info->pci_dev->dev,
6404                         "failed to map memory for controller registers\n");
6405                 rc = -ENOMEM;
6406                 goto release_regions;
6407         }
6408
6409 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
6410
6411         /* Increase the PCIe completion timeout. */
6412         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
6413                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
6414         if (rc) {
6415                 dev_err(&ctrl_info->pci_dev->dev,
6416                         "failed to set PCIe completion timeout\n");
6417                 goto release_regions;
6418         }
6419
6420         /* Enable bus mastering. */
6421         pci_set_master(ctrl_info->pci_dev);
6422
6423         ctrl_info->registers = ctrl_info->iomem_base;
6424         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
6425
6426         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
6427
6428         return 0;
6429
6430 release_regions:
6431         pci_release_regions(ctrl_info->pci_dev);
6432 disable_device:
6433         pci_disable_device(ctrl_info->pci_dev);
6434
6435         return rc;
6436 }
6437
6438 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
6439 {
6440         iounmap(ctrl_info->iomem_base);
6441         pci_release_regions(ctrl_info->pci_dev);
6442         if (pci_is_enabled(ctrl_info->pci_dev))
6443                 pci_disable_device(ctrl_info->pci_dev);
6444         pci_set_drvdata(ctrl_info->pci_dev, NULL);
6445 }
6446
6447 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
6448 {
6449         struct pqi_ctrl_info *ctrl_info;
6450
6451         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
6452                         GFP_KERNEL, numa_node);
6453         if (!ctrl_info)
6454                 return NULL;
6455
6456         mutex_init(&ctrl_info->scan_mutex);
6457         mutex_init(&ctrl_info->lun_reset_mutex);
6458
6459         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
6460         spin_lock_init(&ctrl_info->scsi_device_list_lock);
6461
6462         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
6463         atomic_set(&ctrl_info->num_interrupts, 0);
6464
6465         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
6466         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
6467
6468         init_timer(&ctrl_info->heartbeat_timer);
6469         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
6470
6471         sema_init(&ctrl_info->sync_request_sem,
6472                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
6473         init_waitqueue_head(&ctrl_info->block_requests_wait);
6474
6475         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
6476         spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
6477         INIT_WORK(&ctrl_info->raid_bypass_retry_work,
6478                 pqi_raid_bypass_retry_worker);
6479
6480         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
6481         ctrl_info->irq_mode = IRQ_MODE_NONE;
6482         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
6483
6484         return ctrl_info;
6485 }
6486
6487 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
6488 {
6489         kfree(ctrl_info);
6490 }
6491
6492 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
6493 {
6494         pqi_free_irqs(ctrl_info);
6495         pqi_disable_msix_interrupts(ctrl_info);
6496 }
6497
6498 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
6499 {
6500         pqi_stop_heartbeat_timer(ctrl_info);
6501         pqi_free_interrupts(ctrl_info);
6502         if (ctrl_info->queue_memory_base)
6503                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6504                         ctrl_info->queue_memory_length,
6505                         ctrl_info->queue_memory_base,
6506                         ctrl_info->queue_memory_base_dma_handle);
6507         if (ctrl_info->admin_queue_memory_base)
6508                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6509                         ctrl_info->admin_queue_memory_length,
6510                         ctrl_info->admin_queue_memory_base,
6511                         ctrl_info->admin_queue_memory_base_dma_handle);
6512         pqi_free_all_io_requests(ctrl_info);
6513         if (ctrl_info->error_buffer)
6514                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6515                         ctrl_info->error_buffer_length,
6516                         ctrl_info->error_buffer,
6517                         ctrl_info->error_buffer_dma_handle);
6518         if (ctrl_info->iomem_base)
6519                 pqi_cleanup_pci_init(ctrl_info);
6520         pqi_free_ctrl_info(ctrl_info);
6521 }
6522
6523 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
6524 {
6525         pqi_cancel_rescan_worker(ctrl_info);
6526         pqi_cancel_update_time_worker(ctrl_info);
6527         pqi_remove_all_scsi_devices(ctrl_info);
6528         pqi_unregister_scsi(ctrl_info);
6529         if (ctrl_info->pqi_mode_enabled)
6530                 pqi_revert_to_sis_mode(ctrl_info);
6531         pqi_free_ctrl_resources(ctrl_info);
6532 }
6533
6534 static void pqi_perform_lockup_action(void)
6535 {
6536         switch (pqi_lockup_action) {
6537         case PANIC:
6538                 panic("FATAL: Smart Family Controller lockup detected");
6539                 break;
6540         case REBOOT:
6541                 emergency_restart();
6542                 break;
6543         case NONE:
6544         default:
6545                 break;
6546         }
6547 }
6548
6549 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
6550         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
6551         .status = SAM_STAT_CHECK_CONDITION,
6552 };
6553
6554 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
6555 {
6556         unsigned int i;
6557         struct pqi_io_request *io_request;
6558         struct scsi_cmnd *scmd;
6559
6560         for (i = 0; i < ctrl_info->max_io_slots; i++) {
6561                 io_request = &ctrl_info->io_request_pool[i];
6562                 if (atomic_read(&io_request->refcount) == 0)
6563                         continue;
6564
6565                 scmd = io_request->scmd;
6566                 if (scmd) {
6567                         set_host_byte(scmd, DID_NO_CONNECT);
6568                 } else {
6569                         io_request->status = -ENXIO;
6570                         io_request->error_info =
6571                                 &pqi_ctrl_offline_raid_error_info;
6572                 }
6573
6574                 io_request->io_complete_callback(io_request,
6575                         io_request->context);
6576         }
6577 }
6578
6579 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
6580 {
6581         pqi_perform_lockup_action();
6582         pqi_stop_heartbeat_timer(ctrl_info);
6583         pqi_free_interrupts(ctrl_info);
6584         pqi_cancel_rescan_worker(ctrl_info);
6585         pqi_cancel_update_time_worker(ctrl_info);
6586         pqi_ctrl_wait_until_quiesced(ctrl_info);
6587         pqi_fail_all_outstanding_requests(ctrl_info);
6588         pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
6589         pqi_ctrl_unblock_requests(ctrl_info);
6590 }
6591
6592 static void pqi_ctrl_offline_worker(struct work_struct *work)
6593 {
6594         struct pqi_ctrl_info *ctrl_info;
6595
6596         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
6597         pqi_take_ctrl_offline_deferred(ctrl_info);
6598 }
6599
6600 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
6601 {
6602         if (!ctrl_info->controller_online)
6603                 return;
6604
6605         ctrl_info->controller_online = false;
6606         ctrl_info->pqi_mode_enabled = false;
6607         pqi_ctrl_block_requests(ctrl_info);
6608         if (!pqi_disable_ctrl_shutdown)
6609                 sis_shutdown_ctrl(ctrl_info);
6610         pci_disable_device(ctrl_info->pci_dev);
6611         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
6612         schedule_work(&ctrl_info->ctrl_offline_work);
6613 }
6614
6615 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
6616         const struct pci_device_id *id)
6617 {
6618         char *ctrl_description;
6619
6620         if (id->driver_data)
6621                 ctrl_description = (char *)id->driver_data;
6622         else
6623                 ctrl_description = "Microsemi Smart Family Controller";
6624
6625         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
6626 }
6627
6628 static int pqi_pci_probe(struct pci_dev *pci_dev,
6629         const struct pci_device_id *id)
6630 {
6631         int rc;
6632         int node;
6633         struct pqi_ctrl_info *ctrl_info;
6634
6635         pqi_print_ctrl_info(pci_dev, id);
6636
6637         if (pqi_disable_device_id_wildcards &&
6638                 id->subvendor == PCI_ANY_ID &&
6639                 id->subdevice == PCI_ANY_ID) {
6640                 dev_warn(&pci_dev->dev,
6641                         "controller not probed because device ID wildcards are disabled\n");
6642                 return -ENODEV;
6643         }
6644
6645         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
6646                 dev_warn(&pci_dev->dev,
6647                         "controller device ID matched using wildcards\n");
6648
6649         node = dev_to_node(&pci_dev->dev);
6650         if (node == NUMA_NO_NODE)
6651                 set_dev_node(&pci_dev->dev, 0);
6652
6653         ctrl_info = pqi_alloc_ctrl_info(node);
6654         if (!ctrl_info) {
6655                 dev_err(&pci_dev->dev,
6656                         "failed to allocate controller info block\n");
6657                 return -ENOMEM;
6658         }
6659
6660         ctrl_info->pci_dev = pci_dev;
6661
6662         rc = pqi_pci_init(ctrl_info);
6663         if (rc)
6664                 goto error;
6665
6666         rc = pqi_ctrl_init(ctrl_info);
6667         if (rc)
6668                 goto error;
6669
6670         return 0;
6671
6672 error:
6673         pqi_remove_ctrl(ctrl_info);
6674
6675         return rc;
6676 }
6677
6678 static void pqi_pci_remove(struct pci_dev *pci_dev)
6679 {
6680         struct pqi_ctrl_info *ctrl_info;
6681
6682         ctrl_info = pci_get_drvdata(pci_dev);
6683         if (!ctrl_info)
6684                 return;
6685
6686         pqi_remove_ctrl(ctrl_info);
6687 }
6688
6689 static void pqi_shutdown(struct pci_dev *pci_dev)
6690 {
6691         int rc;
6692         struct pqi_ctrl_info *ctrl_info;
6693
6694         ctrl_info = pci_get_drvdata(pci_dev);
6695         if (!ctrl_info)
6696                 goto error;
6697
6698         /*
6699          * Write all data in the controller's battery-backed cache to
6700          * storage.
6701          */
6702         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
6703         pqi_reset(ctrl_info);
6704         if (rc == 0)
6705                 return;
6706
6707 error:
6708         dev_warn(&pci_dev->dev,
6709                 "unable to flush controller cache\n");
6710 }
6711
6712 static void pqi_process_lockup_action_param(void)
6713 {
6714         unsigned int i;
6715
6716         if (!pqi_lockup_action_param)
6717                 return;
6718
6719         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6720                 if (strcmp(pqi_lockup_action_param,
6721                         pqi_lockup_actions[i].name) == 0) {
6722                         pqi_lockup_action = pqi_lockup_actions[i].action;
6723                         return;
6724                 }
6725         }
6726
6727         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
6728                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
6729 }
6730
6731 static void pqi_process_module_params(void)
6732 {
6733         pqi_process_lockup_action_param();
6734 }
6735
6736 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
6737 {
6738         struct pqi_ctrl_info *ctrl_info;
6739
6740         ctrl_info = pci_get_drvdata(pci_dev);
6741
6742         pqi_disable_events(ctrl_info);
6743         pqi_cancel_update_time_worker(ctrl_info);
6744         pqi_cancel_rescan_worker(ctrl_info);
6745         pqi_wait_until_scan_finished(ctrl_info);
6746         pqi_wait_until_lun_reset_finished(ctrl_info);
6747         pqi_flush_cache(ctrl_info, SUSPEND);
6748         pqi_ctrl_block_requests(ctrl_info);
6749         pqi_ctrl_wait_until_quiesced(ctrl_info);
6750         pqi_wait_until_inbound_queues_empty(ctrl_info);
6751         pqi_ctrl_wait_for_pending_io(ctrl_info);
6752         pqi_stop_heartbeat_timer(ctrl_info);
6753
6754         if (state.event == PM_EVENT_FREEZE)
6755                 return 0;
6756
6757         pci_save_state(pci_dev);
6758         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
6759
6760         ctrl_info->controller_online = false;
6761         ctrl_info->pqi_mode_enabled = false;
6762
6763         return 0;
6764 }
6765
6766 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
6767 {
6768         int rc;
6769         struct pqi_ctrl_info *ctrl_info;
6770
6771         ctrl_info = pci_get_drvdata(pci_dev);
6772
6773         if (pci_dev->current_state != PCI_D0) {
6774                 ctrl_info->max_hw_queue_index = 0;
6775                 pqi_free_interrupts(ctrl_info);
6776                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
6777                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
6778                         IRQF_SHARED, DRIVER_NAME_SHORT,
6779                         &ctrl_info->queue_groups[0]);
6780                 if (rc) {
6781                         dev_err(&ctrl_info->pci_dev->dev,
6782                                 "irq %u init failed with error %d\n",
6783                                 pci_dev->irq, rc);
6784                         return rc;
6785                 }
6786                 pqi_start_heartbeat_timer(ctrl_info);
6787                 pqi_ctrl_unblock_requests(ctrl_info);
6788                 return 0;
6789         }
6790
6791         pci_set_power_state(pci_dev, PCI_D0);
6792         pci_restore_state(pci_dev);
6793
6794         return pqi_ctrl_init_resume(ctrl_info);
6795 }
6796
6797 /* Define the PCI IDs for the controllers that we support. */
6798 static const struct pci_device_id pqi_pci_id_table[] = {
6799         {
6800                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6801                                0x152d, 0x8a22)
6802         },
6803         {
6804                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6805                                0x152d, 0x8a23)
6806         },
6807         {
6808                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6809                                0x152d, 0x8a24)
6810         },
6811         {
6812                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6813                                0x152d, 0x8a36)
6814         },
6815         {
6816                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6817                                0x152d, 0x8a37)
6818         },
6819         {
6820                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6821                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
6822         },
6823         {
6824                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6825                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
6826         },
6827         {
6828                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6829                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
6830         },
6831         {
6832                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6833                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
6834         },
6835         {
6836                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6837                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
6838         },
6839         {
6840                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6841                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
6842         },
6843         {
6844                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6845                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
6846         },
6847         {
6848                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6849                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
6850         },
6851         {
6852                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6853                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
6854         },
6855         {
6856                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6857                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
6858         },
6859         {
6860                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6861                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
6862         },
6863         {
6864                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6865                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
6866         },
6867         {
6868                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6869                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
6870         },
6871         {
6872                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6873                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
6874         },
6875         {
6876                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6877                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
6878         },
6879         {
6880                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6881                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
6882         },
6883         {
6884                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6885                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
6886         },
6887         {
6888                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6889                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
6890         },
6891         {
6892                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6893                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
6894         },
6895         {
6896                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6897                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
6898         },
6899         {
6900                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6901                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
6902         },
6903         {
6904                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6905                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
6906         },
6907         {
6908                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6909                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
6910         },
6911         {
6912                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6913                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
6914         },
6915         {
6916                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6917                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
6918         },
6919         {
6920                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6921                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
6922         },
6923         {
6924                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6925                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
6926         },
6927         {
6928                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6929                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
6930         },
6931         {
6932                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6933                                PCI_VENDOR_ID_DELL, 0x1fe0)
6934         },
6935         {
6936                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6937                                PCI_VENDOR_ID_HP, 0x0600)
6938         },
6939         {
6940                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6941                                PCI_VENDOR_ID_HP, 0x0601)
6942         },
6943         {
6944                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6945                                PCI_VENDOR_ID_HP, 0x0602)
6946         },
6947         {
6948                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6949                                PCI_VENDOR_ID_HP, 0x0603)
6950         },
6951         {
6952                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6953                                PCI_VENDOR_ID_HP, 0x0609)
6954         },
6955         {
6956                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6957                                PCI_VENDOR_ID_HP, 0x0650)
6958         },
6959         {
6960                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6961                                PCI_VENDOR_ID_HP, 0x0651)
6962         },
6963         {
6964                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6965                                PCI_VENDOR_ID_HP, 0x0652)
6966         },
6967         {
6968                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6969                                PCI_VENDOR_ID_HP, 0x0653)
6970         },
6971         {
6972                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6973                                PCI_VENDOR_ID_HP, 0x0654)
6974         },
6975         {
6976                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6977                                PCI_VENDOR_ID_HP, 0x0655)
6978         },
6979         {
6980                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6981                                PCI_VENDOR_ID_HP, 0x0700)
6982         },
6983         {
6984                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6985                                PCI_VENDOR_ID_HP, 0x0701)
6986         },
6987         {
6988                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6989                                PCI_VENDOR_ID_HP, 0x1001)
6990         },
6991         {
6992                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6993                                PCI_VENDOR_ID_HP, 0x1100)
6994         },
6995         {
6996                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6997                                PCI_VENDOR_ID_HP, 0x1101)
6998         },
6999         {
7000                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7001                                PCI_ANY_ID, PCI_ANY_ID)
7002         },
7003         { 0 }
7004 };
7005
7006 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
7007
7008 static struct pci_driver pqi_pci_driver = {
7009         .name = DRIVER_NAME_SHORT,
7010         .id_table = pqi_pci_id_table,
7011         .probe = pqi_pci_probe,
7012         .remove = pqi_pci_remove,
7013         .shutdown = pqi_shutdown,
7014 #if defined(CONFIG_PM)
7015         .suspend = pqi_suspend,
7016         .resume = pqi_resume,
7017 #endif
7018 };
7019
7020 static int __init pqi_init(void)
7021 {
7022         int rc;
7023
7024         pr_info(DRIVER_NAME "\n");
7025
7026         pqi_sas_transport_template =
7027                 sas_attach_transport(&pqi_sas_transport_functions);
7028         if (!pqi_sas_transport_template)
7029                 return -ENODEV;
7030
7031         pqi_process_module_params();
7032
7033         rc = pci_register_driver(&pqi_pci_driver);
7034         if (rc)
7035                 sas_release_transport(pqi_sas_transport_template);
7036
7037         return rc;
7038 }
7039
7040 static void __exit pqi_cleanup(void)
7041 {
7042         pci_unregister_driver(&pqi_pci_driver);
7043         sas_release_transport(pqi_sas_transport_template);
7044 }
7045
7046 module_init(pqi_init);
7047 module_exit(pqi_cleanup);
7048
7049 static void __attribute__((unused)) verify_structures(void)
7050 {
7051         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7052                 sis_host_to_ctrl_doorbell) != 0x20);
7053         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7054                 sis_interrupt_mask) != 0x34);
7055         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7056                 sis_ctrl_to_host_doorbell) != 0x9c);
7057         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7058                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
7059         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7060                 sis_driver_scratch) != 0xb0);
7061         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7062                 sis_firmware_status) != 0xbc);
7063         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7064                 sis_mailbox) != 0x1000);
7065         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7066                 pqi_registers) != 0x4000);
7067
7068         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7069                 iu_type) != 0x0);
7070         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7071                 iu_length) != 0x2);
7072         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7073                 response_queue_id) != 0x4);
7074         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7075                 work_area) != 0x6);
7076         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
7077
7078         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7079                 status) != 0x0);
7080         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7081                 service_response) != 0x1);
7082         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7083                 data_present) != 0x2);
7084         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7085                 reserved) != 0x3);
7086         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7087                 residual_count) != 0x4);
7088         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7089                 data_length) != 0x8);
7090         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7091                 reserved1) != 0xa);
7092         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7093                 data) != 0xc);
7094         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
7095
7096         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7097                 data_in_result) != 0x0);
7098         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7099                 data_out_result) != 0x1);
7100         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7101                 reserved) != 0x2);
7102         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7103                 status) != 0x5);
7104         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7105                 status_qualifier) != 0x6);
7106         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7107                 sense_data_length) != 0x8);
7108         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7109                 response_data_length) != 0xa);
7110         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7111                 data_in_transferred) != 0xc);
7112         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7113                 data_out_transferred) != 0x10);
7114         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7115                 data) != 0x14);
7116         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
7117
7118         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7119                 signature) != 0x0);
7120         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7121                 function_and_status_code) != 0x8);
7122         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7123                 max_admin_iq_elements) != 0x10);
7124         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7125                 max_admin_oq_elements) != 0x11);
7126         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7127                 admin_iq_element_length) != 0x12);
7128         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7129                 admin_oq_element_length) != 0x13);
7130         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7131                 max_reset_timeout) != 0x14);
7132         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7133                 legacy_intx_status) != 0x18);
7134         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7135                 legacy_intx_mask_set) != 0x1c);
7136         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7137                 legacy_intx_mask_clear) != 0x20);
7138         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7139                 device_status) != 0x40);
7140         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7141                 admin_iq_pi_offset) != 0x48);
7142         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7143                 admin_oq_ci_offset) != 0x50);
7144         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7145                 admin_iq_element_array_addr) != 0x58);
7146         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7147                 admin_oq_element_array_addr) != 0x60);
7148         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7149                 admin_iq_ci_addr) != 0x68);
7150         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7151                 admin_oq_pi_addr) != 0x70);
7152         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7153                 admin_iq_num_elements) != 0x78);
7154         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7155                 admin_oq_num_elements) != 0x79);
7156         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7157                 admin_queue_int_msg_num) != 0x7a);
7158         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7159                 device_error) != 0x80);
7160         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7161                 error_details) != 0x88);
7162         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7163                 device_reset) != 0x90);
7164         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7165                 power_action) != 0x94);
7166         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
7167
7168         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7169                 header.iu_type) != 0);
7170         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7171                 header.iu_length) != 2);
7172         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7173                 header.work_area) != 6);
7174         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7175                 request_id) != 8);
7176         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7177                 function_code) != 10);
7178         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7179                 data.report_device_capability.buffer_length) != 44);
7180         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7181                 data.report_device_capability.sg_descriptor) != 48);
7182         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7183                 data.create_operational_iq.queue_id) != 12);
7184         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7185                 data.create_operational_iq.element_array_addr) != 16);
7186         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7187                 data.create_operational_iq.ci_addr) != 24);
7188         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7189                 data.create_operational_iq.num_elements) != 32);
7190         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7191                 data.create_operational_iq.element_length) != 34);
7192         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7193                 data.create_operational_iq.queue_protocol) != 36);
7194         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7195                 data.create_operational_oq.queue_id) != 12);
7196         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7197                 data.create_operational_oq.element_array_addr) != 16);
7198         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7199                 data.create_operational_oq.pi_addr) != 24);
7200         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7201                 data.create_operational_oq.num_elements) != 32);
7202         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7203                 data.create_operational_oq.element_length) != 34);
7204         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7205                 data.create_operational_oq.queue_protocol) != 36);
7206         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7207                 data.create_operational_oq.int_msg_num) != 40);
7208         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7209                 data.create_operational_oq.coalescing_count) != 42);
7210         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7211                 data.create_operational_oq.min_coalescing_time) != 44);
7212         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7213                 data.create_operational_oq.max_coalescing_time) != 48);
7214         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7215                 data.delete_operational_queue.queue_id) != 12);
7216         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
7217         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7218                 data.create_operational_iq) != 64 - 11);
7219         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7220                 data.create_operational_oq) != 64 - 11);
7221         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7222                 data.delete_operational_queue) != 64 - 11);
7223
7224         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7225                 header.iu_type) != 0);
7226         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7227                 header.iu_length) != 2);
7228         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7229                 header.work_area) != 6);
7230         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7231                 request_id) != 8);
7232         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7233                 function_code) != 10);
7234         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7235                 status) != 11);
7236         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7237                 data.create_operational_iq.status_descriptor) != 12);
7238         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7239                 data.create_operational_iq.iq_pi_offset) != 16);
7240         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7241                 data.create_operational_oq.status_descriptor) != 12);
7242         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7243                 data.create_operational_oq.oq_ci_offset) != 16);
7244         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
7245
7246         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7247                 header.iu_type) != 0);
7248         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7249                 header.iu_length) != 2);
7250         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7251                 header.response_queue_id) != 4);
7252         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7253                 header.work_area) != 6);
7254         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7255                 request_id) != 8);
7256         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7257                 nexus_id) != 10);
7258         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7259                 buffer_length) != 12);
7260         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7261                 lun_number) != 16);
7262         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7263                 protocol_specific) != 24);
7264         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7265                 error_index) != 27);
7266         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7267                 cdb) != 32);
7268         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7269                 sg_descriptors) != 64);
7270         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
7271                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7272
7273         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7274                 header.iu_type) != 0);
7275         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7276                 header.iu_length) != 2);
7277         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7278                 header.response_queue_id) != 4);
7279         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7280                 header.work_area) != 6);
7281         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7282                 request_id) != 8);
7283         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7284                 nexus_id) != 12);
7285         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7286                 buffer_length) != 16);
7287         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7288                 data_encryption_key_index) != 22);
7289         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7290                 encrypt_tweak_lower) != 24);
7291         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7292                 encrypt_tweak_upper) != 28);
7293         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7294                 cdb) != 32);
7295         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7296                 error_index) != 48);
7297         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7298                 num_sg_descriptors) != 50);
7299         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7300                 cdb_length) != 51);
7301         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7302                 lun_number) != 52);
7303         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7304                 sg_descriptors) != 64);
7305         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
7306                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7307
7308         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7309                 header.iu_type) != 0);
7310         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7311                 header.iu_length) != 2);
7312         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7313                 request_id) != 8);
7314         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7315                 error_index) != 10);
7316
7317         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7318                 header.iu_type) != 0);
7319         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7320                 header.iu_length) != 2);
7321         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7322                 header.response_queue_id) != 4);
7323         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7324                 request_id) != 8);
7325         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7326                 data.report_event_configuration.buffer_length) != 12);
7327         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7328                 data.report_event_configuration.sg_descriptors) != 16);
7329         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7330                 data.set_event_configuration.global_event_oq_id) != 10);
7331         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7332                 data.set_event_configuration.buffer_length) != 12);
7333         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7334                 data.set_event_configuration.sg_descriptors) != 16);
7335
7336         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7337                 max_inbound_iu_length) != 6);
7338         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7339                 max_outbound_iu_length) != 14);
7340         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
7341
7342         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7343                 data_length) != 0);
7344         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7345                 iq_arbitration_priority_support_bitmask) != 8);
7346         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7347                 maximum_aw_a) != 9);
7348         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7349                 maximum_aw_b) != 10);
7350         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7351                 maximum_aw_c) != 11);
7352         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7353                 max_inbound_queues) != 16);
7354         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7355                 max_elements_per_iq) != 18);
7356         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7357                 max_iq_element_length) != 24);
7358         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7359                 min_iq_element_length) != 26);
7360         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7361                 max_outbound_queues) != 30);
7362         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7363                 max_elements_per_oq) != 32);
7364         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7365                 intr_coalescing_time_granularity) != 34);
7366         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7367                 max_oq_element_length) != 36);
7368         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7369                 min_oq_element_length) != 38);
7370         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7371                 iu_layer_descriptors) != 64);
7372         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
7373
7374         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7375                 event_type) != 0);
7376         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7377                 oq_id) != 2);
7378         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
7379
7380         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7381                 num_event_descriptors) != 2);
7382         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7383                 descriptors) != 4);
7384
7385         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
7386                 ARRAY_SIZE(pqi_supported_event_types));
7387
7388         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7389                 header.iu_type) != 0);
7390         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7391                 header.iu_length) != 2);
7392         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7393                 event_type) != 8);
7394         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7395                 event_id) != 10);
7396         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7397                 additional_event_id) != 12);
7398         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7399                 data) != 16);
7400         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
7401
7402         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7403                 header.iu_type) != 0);
7404         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7405                 header.iu_length) != 2);
7406         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7407                 event_type) != 8);
7408         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7409                 event_id) != 10);
7410         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7411                 additional_event_id) != 12);
7412         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
7413
7414         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7415                 header.iu_type) != 0);
7416         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7417                 header.iu_length) != 2);
7418         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7419                 request_id) != 8);
7420         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7421                 nexus_id) != 10);
7422         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7423                 lun_number) != 16);
7424         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7425                 protocol_specific) != 24);
7426         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7427                 outbound_queue_id_to_manage) != 26);
7428         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7429                 request_id_to_manage) != 28);
7430         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7431                 task_management_function) != 30);
7432         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
7433
7434         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7435                 header.iu_type) != 0);
7436         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7437                 header.iu_length) != 2);
7438         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7439                 request_id) != 8);
7440         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7441                 nexus_id) != 10);
7442         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7443                 additional_response_info) != 12);
7444         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7445                 response_code) != 15);
7446         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
7447
7448         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7449                 configured_logical_drive_count) != 0);
7450         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7451                 configuration_signature) != 1);
7452         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7453                 firmware_version) != 5);
7454         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7455                 extended_logical_unit_count) != 154);
7456         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7457                 firmware_build_number) != 190);
7458         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7459                 controller_mode) != 292);
7460
7461         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7462                 phys_bay_in_box) != 115);
7463         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7464                 device_type) != 120);
7465         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7466                 redundant_path_present_map) != 1736);
7467         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7468                 active_path_number) != 1738);
7469         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7470                 alternate_paths_phys_connector) != 1739);
7471         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7472                 alternate_paths_phys_box_on_port) != 1755);
7473         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7474                 current_queue_depth_limit) != 1796);
7475         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
7476
7477         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
7478         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
7479         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
7480                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7481         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
7482                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7483         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
7484         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
7485                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7486         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
7487         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
7488                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7489
7490         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
7491         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
7492                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
7493 }