drivers/scsi/megaraid/megaraid_sas_fusion.c

   1 /*
   2  *  Linux MegaRAID driver for SAS based RAID controllers
   3  *
   4  *  Copyright (c) 2009-2011  LSI Corporation.
   5  *
   6  *  This program is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU General Public License
   8  *  as published by the Free Software Foundation; either version 2
   9  *  of the License, or (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  *  FILE: megaraid_sas_fusion.c
  21  *
  22  *  Authors: LSI Corporation
  23  *           Sumant Patro
  24  *           Adam Radford <linuxraid@lsi.com>
  25  *
  26  *  Send feedback to: <megaraidlinux@lsi.com>
  27  *
  28  *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
  29  *     ATTN: Linuxraid
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/types.h>
  34 #include <linux/pci.h>
  35 #include <linux/list.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/module.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/delay.h>
  41 #include <linux/uio.h>
  42 #include <linux/uaccess.h>
  43 #include <linux/fs.h>
  44 #include <linux/compat.h>
  45 #include <linux/blkdev.h>
  46 #include <linux/mutex.h>
  47 #include <linux/poll.h>
  48
  49 #include <scsi/scsi.h>
  50 #include <scsi/scsi_cmnd.h>
  51 #include <scsi/scsi_device.h>
  52 #include <scsi/scsi_host.h>
  53
  54 #include "megaraid_sas_fusion.h"
  55 #include "megaraid_sas.h"
  56
  57 extern void megasas_free_cmds(struct megasas_instance *instance);
  58 extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
  59                                            *instance);
  60 extern void
  61 megasas_complete_cmd(struct megasas_instance *instance,
  62                      struct megasas_cmd *cmd, u8 alt_status);
  63 int megasas_is_ldio(struct scsi_cmnd *cmd);
  64 int
  65 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd);
  66
  67 void
  68 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
  69 int megasas_alloc_cmds(struct megasas_instance *instance);
  70 int
  71 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs);
  72 int
  73 megasas_issue_polled(struct megasas_instance *instance,
  74                      struct megasas_cmd *cmd);
  75
  76 u8
  77 MR_BuildRaidContext(struct megasas_instance *instance,
  78                     struct IO_REQUEST_INFO *io_info,
  79                     struct RAID_CONTEXT *pRAID_Context,
  80                     struct MR_FW_RAID_MAP_ALL *map);
  81 u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_FW_RAID_MAP_ALL *map);
  82 struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_FW_RAID_MAP_ALL *map);
  83
  84 u16 MR_GetLDTgtId(u32 ld, struct MR_FW_RAID_MAP_ALL *map);
  85
  86 void
  87 megasas_check_and_restore_queue_depth(struct megasas_instance *instance);
  88
  89 u8 MR_ValidateMapInfo(struct MR_FW_RAID_MAP_ALL *map,
  90                       struct LD_LOAD_BALANCE_INFO *lbInfo);
  91 u16 get_updated_dev_handle(struct LD_LOAD_BALANCE_INFO *lbInfo,
  92                            struct IO_REQUEST_INFO *in_info);
  93 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
  94 void megaraid_sas_kill_hba(struct megasas_instance *instance);
  95
  96 extern u32 megasas_dbg_lvl;
  97 extern int resetwaittime;
  98
  99 /**
 100  * megasas_enable_intr_fusion - Enables interrupts
 101  * @regs:                       MFI register set
 102  */
 103 void
 104 megasas_enable_intr_fusion(struct megasas_register_set __iomem *regs)
 105 {
 106         /* For Thunderbolt/Invader also clear intr on enable */
 107         writel(~0, &regs->outbound_intr_status);
 108         readl(&regs->outbound_intr_status);
 109
 110         writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 111
 112         /* Dummy readl to force pci flush */
 113         readl(&regs->outbound_intr_mask);
 114 }
 115
 116 /**
 117  * megasas_disable_intr_fusion - Disables interrupt
 118  * @regs:                        MFI register set
 119  */
 120 void
 121 megasas_disable_intr_fusion(struct megasas_register_set __iomem *regs)
 122 {
 123         u32 mask = 0xFFFFFFFF;
 124         u32 status;
 125
 126         writel(mask, &regs->outbound_intr_mask);
 127         /* Dummy readl to force pci flush */
 128         status = readl(&regs->outbound_intr_mask);
 129 }
 130
 131 int
 132 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs)
 133 {
 134         u32 status;
 135         /*
 136          * Check if it is our interrupt
 137          */
 138         status = readl(&regs->outbound_intr_status);
 139
 140         if (status & 1) {
 141                 writel(status, &regs->outbound_intr_status);
 142                 readl(&regs->outbound_intr_status);
 143                 return 1;
 144         }
 145         if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
 146                 return 0;
 147
 148         return 1;
 149 }
 150
 151 /**
 152  * megasas_get_cmd_fusion -     Get a command from the free pool
 153  * @instance:           Adapter soft state
 154  *
 155  * Returns a free command from the pool
 156  */
 157 struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 158                                                   *instance)
 159 {
 160         unsigned long flags;
 161         struct fusion_context *fusion =
 162                 (struct fusion_context *)instance->ctrl_context;
 163         struct megasas_cmd_fusion *cmd = NULL;
 164
 165         spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
 166
 167         if (!list_empty(&fusion->cmd_pool)) {
 168                 cmd = list_entry((&fusion->cmd_pool)->next,
 169                                  struct megasas_cmd_fusion, list);
 170                 list_del_init(&cmd->list);
 171         } else {
 172                 printk(KERN_ERR "megasas: Command pool (fusion) empty!\n");
 173         }
 174
 175         spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
 176         return cmd;
 177 }
 178
 179 /**
 180  * megasas_return_cmd_fusion -  Return a cmd to free command pool
 181  * @instance:           Adapter soft state
 182  * @cmd:                Command packet to be returned to free command pool
 183  */
 184 static inline void
 185 megasas_return_cmd_fusion(struct megasas_instance *instance,
 186                           struct megasas_cmd_fusion *cmd)
 187 {
 188         unsigned long flags;
 189         struct fusion_context *fusion =
 190                 (struct fusion_context *)instance->ctrl_context;
 191
 192         spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
 193
 194         cmd->scmd = NULL;
 195         cmd->sync_cmd_idx = (u32)ULONG_MAX;
 196         list_add_tail(&cmd->list, &fusion->cmd_pool);
 197
 198         spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
 199 }
 200
 201 /**
 202  * megasas_teardown_frame_pool_fusion - Destroy the cmd frame DMA pool
 203  * @instance:                           Adapter soft state
 204  */
 205 static void megasas_teardown_frame_pool_fusion(
 206         struct megasas_instance *instance)
 207 {
 208         int i;
 209         struct fusion_context *fusion = instance->ctrl_context;
 210
 211         u16 max_cmd = instance->max_fw_cmds;
 212
 213         struct megasas_cmd_fusion *cmd;
 214
 215         if (!fusion->sg_dma_pool || !fusion->sense_dma_pool) {
 216                 printk(KERN_ERR "megasas: dma pool is null. SG Pool %p, "
 217                        "sense pool : %p\n", fusion->sg_dma_pool,
 218                        fusion->sense_dma_pool);
 219                 return;
 220         }
 221
 222         /*
 223          * Return all frames to pool
 224          */
 225         for (i = 0; i < max_cmd; i++) {
 226
 227                 cmd = fusion->cmd_list[i];
 228
 229                 if (cmd->sg_frame)
 230                         pci_pool_free(fusion->sg_dma_pool, cmd->sg_frame,
 231                                       cmd->sg_frame_phys_addr);
 232
 233                 if (cmd->sense)
 234                         pci_pool_free(fusion->sense_dma_pool, cmd->sense,
 235                                       cmd->sense_phys_addr);
 236         }
 237
 238         /*
 239          * Now destroy the pool itself
 240          */
 241         pci_pool_destroy(fusion->sg_dma_pool);
 242         pci_pool_destroy(fusion->sense_dma_pool);
 243
 244         fusion->sg_dma_pool = NULL;
 245         fusion->sense_dma_pool = NULL;
 246 }
 247
 248 /**
 249  * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
 250  * @instance:           Adapter soft state
 251  */
 252 void
 253 megasas_free_cmds_fusion(struct megasas_instance *instance)
 254 {
 255         int i;
 256         struct fusion_context *fusion = instance->ctrl_context;
 257
 258         u32 max_cmds, req_sz, reply_sz, io_frames_sz;
 259
 260
 261         req_sz = fusion->request_alloc_sz;
 262         reply_sz = fusion->reply_alloc_sz;
 263         io_frames_sz = fusion->io_frames_alloc_sz;
 264
 265         max_cmds = instance->max_fw_cmds;
 266
 267         /* Free descriptors and request Frames memory */
 268         if (fusion->req_frames_desc)
 269                 dma_free_coherent(&instance->pdev->dev, req_sz,
 270                                   fusion->req_frames_desc,
 271                                   fusion->req_frames_desc_phys);
 272
 273         if (fusion->reply_frames_desc) {
 274                 pci_pool_free(fusion->reply_frames_desc_pool,
 275                               fusion->reply_frames_desc,
 276                               fusion->reply_frames_desc_phys);
 277                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 278         }
 279
 280         if (fusion->io_request_frames) {
 281                 pci_pool_free(fusion->io_request_frames_pool,
 282                               fusion->io_request_frames,
 283                               fusion->io_request_frames_phys);
 284                 pci_pool_destroy(fusion->io_request_frames_pool);
 285         }
 286
 287         /* Free the Fusion frame pool */
 288         megasas_teardown_frame_pool_fusion(instance);
 289
 290         /* Free all the commands in the cmd_list */
 291         for (i = 0; i < max_cmds; i++)
 292                 kfree(fusion->cmd_list[i]);
 293
 294         /* Free the cmd_list buffer itself */
 295         kfree(fusion->cmd_list);
 296         fusion->cmd_list = NULL;
 297
 298         INIT_LIST_HEAD(&fusion->cmd_pool);
 299 }
 300
 301 /**
 302  * megasas_create_frame_pool_fusion -   Creates DMA pool for cmd frames
 303  * @instance:                   Adapter soft state
 304  *
 305  */
 306 static int megasas_create_frame_pool_fusion(struct megasas_instance *instance)
 307 {
 308         int i;
 309         u32 max_cmd;
 310         struct fusion_context *fusion;
 311         struct megasas_cmd_fusion *cmd;
 312         u32 total_sz_chain_frame;
 313
 314         fusion = instance->ctrl_context;
 315         max_cmd = instance->max_fw_cmds;
 316
 317         total_sz_chain_frame = MEGASAS_MAX_SZ_CHAIN_FRAME;
 318
 319         /*
 320          * Use DMA pool facility provided by PCI layer
 321          */
 322
 323         fusion->sg_dma_pool = pci_pool_create("megasas sg pool fusion",
 324                                               instance->pdev,
 325                                               total_sz_chain_frame, 4,
 326                                               0);
 327         if (!fusion->sg_dma_pool) {
 328                 printk(KERN_DEBUG "megasas: failed to setup request pool "
 329                        "fusion\n");
 330                 return -ENOMEM;
 331         }
 332         fusion->sense_dma_pool = pci_pool_create("megasas sense pool fusion",
 333                                                  instance->pdev,
 334                                                  SCSI_SENSE_BUFFERSIZE, 64, 0);
 335
 336         if (!fusion->sense_dma_pool) {
 337                 printk(KERN_DEBUG "megasas: failed to setup sense pool "
 338                        "fusion\n");
 339                 pci_pool_destroy(fusion->sg_dma_pool);
 340                 fusion->sg_dma_pool = NULL;
 341                 return -ENOMEM;
 342         }
 343
 344         /*
 345          * Allocate and attach a frame to each of the commands in cmd_list
 346          */
 347         for (i = 0; i < max_cmd; i++) {
 348
 349                 cmd = fusion->cmd_list[i];
 350
 351                 cmd->sg_frame = pci_pool_alloc(fusion->sg_dma_pool,
 352                                                GFP_KERNEL,
 353                                                &cmd->sg_frame_phys_addr);
 354
 355                 cmd->sense = pci_pool_alloc(fusion->sense_dma_pool,
 356                                             GFP_KERNEL, &cmd->sense_phys_addr);
 357                 /*
 358                  * megasas_teardown_frame_pool_fusion() takes care of freeing
 359                  * whatever has been allocated
 360                  */
 361                 if (!cmd->sg_frame || !cmd->sense) {
 362                         printk(KERN_DEBUG "megasas: pci_pool_alloc failed\n");
 363                         megasas_teardown_frame_pool_fusion(instance);
 364                         return -ENOMEM;
 365                 }
 366         }
 367         return 0;
 368 }
 369
 370 /**
 371  * megasas_alloc_cmds_fusion -  Allocates the command packets
 372  * @instance:           Adapter soft state
 373  *
 374  *
 375  * Each frame has a 32-bit field called context. This context is used to get
 376  * back the megasas_cmd_fusion from the frame when a frame gets completed
 377  * In this driver, the 32 bit values are the indices into an array cmd_list.
 378  * This array is used only to look up the megasas_cmd_fusion given the context.
 379  * The free commands themselves are maintained in a linked list called cmd_pool.
 380  *
 381  * cmds are formed in the io_request and sg_frame members of the
 382  * megasas_cmd_fusion. The context field is used to get a request descriptor
 383  * and is used as SMID of the cmd.
 384  * SMID value range is from 1 to max_fw_cmds.
 385  */
 386 int
 387 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 388 {
 389         int i, j, count;
 390         u32 max_cmd, io_frames_sz;
 391         struct fusion_context *fusion;
 392         struct megasas_cmd_fusion *cmd;
 393         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 394         u32 offset;
 395         dma_addr_t io_req_base_phys;
 396         u8 *io_req_base;
 397
 398         fusion = instance->ctrl_context;
 399
 400         max_cmd = instance->max_fw_cmds;
 401
 402         fusion->req_frames_desc =
 403                 dma_alloc_coherent(&instance->pdev->dev,
 404                                    fusion->request_alloc_sz,
 405                                    &fusion->req_frames_desc_phys, GFP_KERNEL);
 406
 407         if (!fusion->req_frames_desc) {
 408                 printk(KERN_ERR "megasas; Could not allocate memory for "
 409                        "request_frames\n");
 410                 goto fail_req_desc;
 411         }
 412
 413         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 414         fusion->reply_frames_desc_pool =
 415                 pci_pool_create("reply_frames pool", instance->pdev,
 416                                 fusion->reply_alloc_sz * count, 16, 0);
 417
 418         if (!fusion->reply_frames_desc_pool) {
 419                 printk(KERN_ERR "megasas; Could not allocate memory for "
 420                        "reply_frame pool\n");
 421                 goto fail_reply_desc;
 422         }
 423
 424         fusion->reply_frames_desc =
 425                 pci_pool_alloc(fusion->reply_frames_desc_pool, GFP_KERNEL,
 426                                &fusion->reply_frames_desc_phys);
 427         if (!fusion->reply_frames_desc) {
 428                 printk(KERN_ERR "megasas; Could not allocate memory for "
 429                        "reply_frame pool\n");
 430                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 431                 goto fail_reply_desc;
 432         }
 433
 434         reply_desc = fusion->reply_frames_desc;
 435         for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
 436                 reply_desc->Words = ULLONG_MAX;
 437
 438         io_frames_sz = fusion->io_frames_alloc_sz;
 439
 440         fusion->io_request_frames_pool =
 441                 pci_pool_create("io_request_frames pool", instance->pdev,
 442                                 fusion->io_frames_alloc_sz, 16, 0);
 443
 444         if (!fusion->io_request_frames_pool) {
 445                 printk(KERN_ERR "megasas: Could not allocate memory for "
 446                        "io_request_frame pool\n");
 447                 goto fail_io_frames;
 448         }
 449
 450         fusion->io_request_frames =
 451                 pci_pool_alloc(fusion->io_request_frames_pool, GFP_KERNEL,
 452                                &fusion->io_request_frames_phys);
 453         if (!fusion->io_request_frames) {
 454                 printk(KERN_ERR "megasas: Could not allocate memory for "
 455                        "io_request_frames frames\n");
 456                 pci_pool_destroy(fusion->io_request_frames_pool);
 457                 goto fail_io_frames;
 458         }
 459
 460         /*
 461          * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
 462          * Allocate the dynamic array first and then allocate individual
 463          * commands.
 464          */
 465         fusion->cmd_list = kzalloc(sizeof(struct megasas_cmd_fusion *)
 466                                    * max_cmd, GFP_KERNEL);
 467
 468         if (!fusion->cmd_list) {
 469                 printk(KERN_DEBUG "megasas: out of memory. Could not alloc "
 470                        "memory for cmd_list_fusion\n");
 471                 goto fail_cmd_list;
 472         }
 473
 474         max_cmd = instance->max_fw_cmds;
 475         for (i = 0; i < max_cmd; i++) {
 476                 fusion->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd_fusion),
 477                                               GFP_KERNEL);
 478                 if (!fusion->cmd_list[i]) {
 479                         printk(KERN_ERR "Could not alloc cmd list fusion\n");
 480
 481                         for (j = 0; j < i; j++)
 482                                 kfree(fusion->cmd_list[j]);
 483
 484                         kfree(fusion->cmd_list);
 485                         fusion->cmd_list = NULL;
 486                         goto fail_cmd_list;
 487                 }
 488         }
 489
 490         /* The first 256 bytes (SMID 0) is not used. Don't add to cmd list */
 491         io_req_base = fusion->io_request_frames +
 492                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 493         io_req_base_phys = fusion->io_request_frames_phys +
 494                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 495
 496         /*
 497          * Add all the commands to command pool (fusion->cmd_pool)
 498          */
 499
 500         /* SMID 0 is reserved. Set SMID/index from 1 */
 501         for (i = 0; i < max_cmd; i++) {
 502                 cmd = fusion->cmd_list[i];
 503                 offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
 504                 memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 505                 cmd->index = i + 1;
 506                 cmd->scmd = NULL;
 507                 cmd->sync_cmd_idx = (u32)ULONG_MAX; /* Set to Invalid */
 508                 cmd->instance = instance;
 509                 cmd->io_request =
 510                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
 511                   (io_req_base + offset);
 512                 memset(cmd->io_request, 0,
 513                        sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 514                 cmd->io_request_phys_addr = io_req_base_phys + offset;
 515
 516                 list_add_tail(&cmd->list, &fusion->cmd_pool);
 517         }
 518
 519         /*
 520          * Create a frame pool and assign one frame to each cmd
 521          */
 522         if (megasas_create_frame_pool_fusion(instance)) {
 523                 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
 524                 megasas_free_cmds_fusion(instance);
 525                 goto fail_req_desc;
 526         }
 527
 528         return 0;
 529
 530 fail_cmd_list:
 531         pci_pool_free(fusion->io_request_frames_pool, fusion->io_request_frames,
 532                       fusion->io_request_frames_phys);
 533         pci_pool_destroy(fusion->io_request_frames_pool);
 534 fail_io_frames:
 535         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 536                           fusion->reply_frames_desc,
 537                           fusion->reply_frames_desc_phys);
 538         pci_pool_free(fusion->reply_frames_desc_pool,
 539                       fusion->reply_frames_desc,
 540                       fusion->reply_frames_desc_phys);
 541         pci_pool_destroy(fusion->reply_frames_desc_pool);
 542
 543 fail_reply_desc:
 544         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 545                           fusion->req_frames_desc,
 546                           fusion->req_frames_desc_phys);
 547 fail_req_desc:
 548         return -ENOMEM;
 549 }
 550
 551 /**
 552  * wait_and_poll -      Issues a polling command
 553  * @instance:                   Adapter soft state
 554  * @cmd:                        Command packet to be issued
 555  *
 556  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
 557  */
 558 int
 559 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd)
 560 {
 561         int i;
 562         struct megasas_header *frame_hdr = &cmd->frame->hdr;
 563
 564         u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
 565
 566         /*
 567          * Wait for cmd_status to change
 568          */
 569         for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
 570                 rmb();
 571                 msleep(20);
 572         }
 573
 574         if (frame_hdr->cmd_status == 0xff)
 575                 return -ETIME;
 576
 577         return 0;
 578 }
 579
 580 /**
 581  * megasas_ioc_init_fusion -    Initializes the FW
 582  * @instance:           Adapter soft state
 583  *
 584  * Issues the IOC Init cmd
 585  */
 586 int
 587 megasas_ioc_init_fusion(struct megasas_instance *instance)
 588 {
 589         struct megasas_init_frame *init_frame;
 590         struct MPI2_IOC_INIT_REQUEST *IOCInitMessage;
 591         dma_addr_t      ioc_init_handle;
 592         struct megasas_cmd *cmd;
 593         u8 ret;
 594         struct fusion_context *fusion;
 595         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
 596         int i;
 597         struct megasas_header *frame_hdr;
 598
 599         fusion = instance->ctrl_context;
 600
 601         cmd = megasas_get_cmd(instance);
 602
 603         if (!cmd) {
 604                 printk(KERN_ERR "Could not allocate cmd for INIT Frame\n");
 605                 ret = 1;
 606                 goto fail_get_cmd;
 607         }
 608
 609         IOCInitMessage =
 610           dma_alloc_coherent(&instance->pdev->dev,
 611                              sizeof(struct MPI2_IOC_INIT_REQUEST),
 612                              &ioc_init_handle, GFP_KERNEL);
 613
 614         if (!IOCInitMessage) {
 615                 printk(KERN_ERR "Could not allocate memory for "
 616                        "IOCInitMessage\n");
 617                 ret = 1;
 618                 goto fail_fw_init;
 619         }
 620
 621         memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
 622
 623         IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
 624         IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
 625         IOCInitMessage->MsgVersion = MPI2_VERSION;
 626         IOCInitMessage->HeaderVersion = MPI2_HEADER_VERSION;
 627         IOCInitMessage->SystemRequestFrameSize =
 628                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4;
 629
 630         IOCInitMessage->ReplyDescriptorPostQueueDepth = fusion->reply_q_depth;
 631         IOCInitMessage->ReplyDescriptorPostQueueAddress =
 632                 fusion->reply_frames_desc_phys;
 633         IOCInitMessage->SystemRequestFrameBaseAddress =
 634                 fusion->io_request_frames_phys;
 635         IOCInitMessage->HostMSIxVectors = instance->msix_vectors;
 636         init_frame = (struct megasas_init_frame *)cmd->frame;
 637         memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
 638
 639         frame_hdr = &cmd->frame->hdr;
 640         frame_hdr->cmd_status = 0xFF;
 641         frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
 642
 643         init_frame->cmd = MFI_CMD_INIT;
 644         init_frame->cmd_status = 0xFF;
 645
 646         init_frame->queue_info_new_phys_addr_lo = ioc_init_handle;
 647         init_frame->data_xfer_len = sizeof(struct MPI2_IOC_INIT_REQUEST);
 648
 649         req_desc =
 650           (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)fusion->req_frames_desc;
 651
 652         req_desc->Words = cmd->frame_phys_addr;
 653         req_desc->MFAIo.RequestFlags =
 654                 (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
 655                  MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 656
 657         /*
 658          * disable the intr before firing the init frame
 659          */
 660         instance->instancet->disable_intr(instance->reg_set);
 661
 662         for (i = 0; i < (10 * 1000); i += 20) {
 663                 if (readl(&instance->reg_set->doorbell) & 1)
 664                         msleep(20);
 665                 else
 666                         break;
 667         }
 668
 669         instance->instancet->fire_cmd(instance, req_desc->u.low,
 670                                       req_desc->u.high, instance->reg_set);
 671
 672         wait_and_poll(instance, cmd);
 673
 674         frame_hdr = &cmd->frame->hdr;
 675         if (frame_hdr->cmd_status != 0) {
 676                 ret = 1;
 677                 goto fail_fw_init;
 678         }
 679         printk(KERN_ERR "megasas:IOC Init cmd success\n");
 680
 681         ret = 0;
 682
 683 fail_fw_init:
 684         megasas_return_cmd(instance, cmd);
 685         if (IOCInitMessage)
 686                 dma_free_coherent(&instance->pdev->dev,
 687                                   sizeof(struct MPI2_IOC_INIT_REQUEST),
 688                                   IOCInitMessage, ioc_init_handle);
 689 fail_get_cmd:
 690         return ret;
 691 }
 692
 693 /*
 694  * megasas_get_ld_map_info -    Returns FW's ld_map structure
 695  * @instance:                           Adapter soft state
 696  * @pend:                               Pend the command or not
 697  * Issues an internal command (DCMD) to get the FW's controller PD
 698  * list structure.  This information is mainly used to find out SYSTEM
 699  * supported by the FW.
 700  */
 701 static int
 702 megasas_get_ld_map_info(struct megasas_instance *instance)
 703 {
 704         int ret = 0;
 705         struct megasas_cmd *cmd;
 706         struct megasas_dcmd_frame *dcmd;
 707         struct MR_FW_RAID_MAP_ALL *ci;
 708         dma_addr_t ci_h = 0;
 709         u32 size_map_info;
 710         struct fusion_context *fusion;
 711
 712         cmd = megasas_get_cmd(instance);
 713
 714         if (!cmd) {
 715                 printk(KERN_DEBUG "megasas: Failed to get cmd for map info.\n");
 716                 return -ENOMEM;
 717         }
 718
 719         fusion = instance->ctrl_context;
 720
 721         if (!fusion) {
 722                 megasas_return_cmd(instance, cmd);
 723                 return 1;
 724         }
 725
 726         dcmd = &cmd->frame->dcmd;
 727
 728         size_map_info = sizeof(struct MR_FW_RAID_MAP) +
 729                 (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 730
 731         ci = fusion->ld_map[(instance->map_id & 1)];
 732         ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
 733
 734         if (!ci) {
 735                 printk(KERN_DEBUG "Failed to alloc mem for ld_map_info\n");
 736                 megasas_return_cmd(instance, cmd);
 737                 return -ENOMEM;
 738         }
 739
 740         memset(ci, 0, sizeof(*ci));
 741         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 742
 743         dcmd->cmd = MFI_CMD_DCMD;
 744         dcmd->cmd_status = 0xFF;
 745         dcmd->sge_count = 1;
 746         dcmd->flags = MFI_FRAME_DIR_READ;
 747         dcmd->timeout = 0;
 748         dcmd->pad_0 = 0;
 749         dcmd->data_xfer_len = size_map_info;
 750         dcmd->opcode = MR_DCMD_LD_MAP_GET_INFO;
 751         dcmd->sgl.sge32[0].phys_addr = ci_h;
 752         dcmd->sgl.sge32[0].length = size_map_info;
 753
 754         if (!megasas_issue_polled(instance, cmd))
 755                 ret = 0;
 756         else {
 757                 printk(KERN_ERR "megasas: Get LD Map Info Failed\n");
 758                 ret = -1;
 759         }
 760
 761         megasas_return_cmd(instance, cmd);
 762
 763         return ret;
 764 }
 765
 766 u8
 767 megasas_get_map_info(struct megasas_instance *instance)
 768 {
 769         struct fusion_context *fusion = instance->ctrl_context;
 770
 771         fusion->fast_path_io = 0;
 772         if (!megasas_get_ld_map_info(instance)) {
 773                 if (MR_ValidateMapInfo(fusion->ld_map[(instance->map_id & 1)],
 774                                        fusion->load_balance_info)) {
 775                         fusion->fast_path_io = 1;
 776                         return 0;
 777                 }
 778         }
 779         return 1;
 780 }
 781
 782 /*
 783  * megasas_sync_map_info -      Returns FW's ld_map structure
 784  * @instance:                           Adapter soft state
 785  *
 786  * Issues an internal command (DCMD) to get the FW's controller PD
 787  * list structure.  This information is mainly used to find out SYSTEM
 788  * supported by the FW.
 789  */
 790 int
 791 megasas_sync_map_info(struct megasas_instance *instance)
 792 {
 793         int ret = 0, i;
 794         struct megasas_cmd *cmd;
 795         struct megasas_dcmd_frame *dcmd;
 796         u32 size_sync_info, num_lds;
 797         struct fusion_context *fusion;
 798         struct MR_LD_TARGET_SYNC *ci = NULL;
 799         struct MR_FW_RAID_MAP_ALL *map;
 800         struct MR_LD_RAID  *raid;
 801         struct MR_LD_TARGET_SYNC *ld_sync;
 802         dma_addr_t ci_h = 0;
 803         u32 size_map_info;
 804
 805         cmd = megasas_get_cmd(instance);
 806
 807         if (!cmd) {
 808                 printk(KERN_DEBUG "megasas: Failed to get cmd for sync"
 809                        "info.\n");
 810                 return -ENOMEM;
 811         }
 812
 813         fusion = instance->ctrl_context;
 814
 815         if (!fusion) {
 816                 megasas_return_cmd(instance, cmd);
 817                 return 1;
 818         }
 819
 820         map = fusion->ld_map[instance->map_id & 1];
 821
 822         num_lds = map->raidMap.ldCount;
 823
 824         dcmd = &cmd->frame->dcmd;
 825
 826         size_sync_info = sizeof(struct MR_LD_TARGET_SYNC) *num_lds;
 827
 828         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 829
 830         ci = (struct MR_LD_TARGET_SYNC *)
 831           fusion->ld_map[(instance->map_id - 1) & 1];
 832         memset(ci, 0, sizeof(struct MR_FW_RAID_MAP_ALL));
 833
 834         ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
 835
 836         ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
 837
 838         for (i = 0; i < num_lds; i++, ld_sync++) {
 839                 raid = MR_LdRaidGet(i, map);
 840                 ld_sync->targetId = MR_GetLDTgtId(i, map);
 841                 ld_sync->seqNum = raid->seqNum;
 842         }
 843
 844         size_map_info = sizeof(struct MR_FW_RAID_MAP) +
 845                 (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 846
 847         dcmd->cmd = MFI_CMD_DCMD;
 848         dcmd->cmd_status = 0xFF;
 849         dcmd->sge_count = 1;
 850         dcmd->flags = MFI_FRAME_DIR_WRITE;
 851         dcmd->timeout = 0;
 852         dcmd->pad_0 = 0;
 853         dcmd->data_xfer_len = size_map_info;
 854         dcmd->mbox.b[0] = num_lds;
 855         dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
 856         dcmd->opcode = MR_DCMD_LD_MAP_GET_INFO;
 857         dcmd->sgl.sge32[0].phys_addr = ci_h;
 858         dcmd->sgl.sge32[0].length = size_map_info;
 859
 860         instance->map_update_cmd = cmd;
 861
 862         instance->instancet->issue_dcmd(instance, cmd);
 863
 864         return ret;
 865 }
 866
 867 /**
 868  * megasas_init_adapter_fusion -        Initializes the FW
 869  * @instance:           Adapter soft state
 870  *
 871  * This is the main function for initializing firmware.
 872  */
 873 u32
 874 megasas_init_adapter_fusion(struct megasas_instance *instance)
 875 {
 876         struct megasas_register_set __iomem *reg_set;
 877         struct fusion_context *fusion;
 878         u32 max_cmd;
 879         int i = 0, count;
 880
 881         fusion = instance->ctrl_context;
 882
 883         reg_set = instance->reg_set;
 884
 885         /*
 886          * Get various operational parameters from status register
 887          */
 888         instance->max_fw_cmds =
 889                 instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
 890         instance->max_fw_cmds = min(instance->max_fw_cmds, (u16)1008);
 891
 892         /*
 893          * Reduce the max supported cmds by 1. This is to ensure that the
 894          * reply_q_sz (1 more than the max cmd that driver may send)
 895          * does not exceed max cmds that the FW can support
 896          */
 897         instance->max_fw_cmds = instance->max_fw_cmds-1;
 898         /* Only internal cmds (DCMD) need to have MFI frames */
 899         instance->max_mfi_cmds = MEGASAS_INT_CMDS;
 900
 901         max_cmd = instance->max_fw_cmds;
 902
 903         fusion->reply_q_depth = ((max_cmd + 1 + 15)/16)*16;
 904
 905         fusion->request_alloc_sz =
 906                 sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *max_cmd;
 907         fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)
 908                 *(fusion->reply_q_depth);
 909         fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
 910                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE *
 911                  (max_cmd + 1)); /* Extra 1 for SMID 0 */
 912
 913         fusion->max_sge_in_main_msg =
 914           (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
 915            offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
 916
 917         fusion->max_sge_in_chain =
 918                 MEGASAS_MAX_SZ_CHAIN_FRAME / sizeof(union MPI2_SGE_IO_UNION);
 919
 920         instance->max_num_sge = fusion->max_sge_in_main_msg +
 921                 fusion->max_sge_in_chain - 2;
 922
 923         /* Used for pass thru MFI frame (DCMD) */
 924         fusion->chain_offset_mfi_pthru =
 925                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
 926
 927         fusion->chain_offset_io_request =
 928                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
 929                  sizeof(union MPI2_SGE_IO_UNION))/16;
 930
 931         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 932         for (i = 0 ; i < count; i++)
 933                 fusion->last_reply_idx[i] = 0;
 934
 935         /*
 936          * Allocate memory for descriptors
 937          * Create a pool of commands
 938          */
 939         if (megasas_alloc_cmds(instance))
 940                 goto fail_alloc_mfi_cmds;
 941         if (megasas_alloc_cmds_fusion(instance))
 942                 goto fail_alloc_cmds;
 943
 944         if (megasas_ioc_init_fusion(instance))
 945                 goto fail_ioc_init;
 946
 947         instance->flag_ieee = 1;
 948
 949         fusion->map_sz =  sizeof(struct MR_FW_RAID_MAP) +
 950           (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 951
 952         fusion->fast_path_io = 0;
 953
 954         for (i = 0; i < 2; i++) {
 955                 fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
 956                                                        fusion->map_sz,
 957                                                        &fusion->ld_map_phys[i],
 958                                                        GFP_KERNEL);
 959                 if (!fusion->ld_map[i]) {
 960                         printk(KERN_ERR "megasas: Could not allocate memory "
 961                                "for map info\n");
 962                         goto fail_map_info;
 963                 }
 964         }
 965
 966         if (!megasas_get_map_info(instance))
 967                 megasas_sync_map_info(instance);
 968
 969         return 0;
 970
 971 fail_map_info:
 972         if (i == 1)
 973                 dma_free_coherent(&instance->pdev->dev, fusion->map_sz,
 974                                   fusion->ld_map[0], fusion->ld_map_phys[0]);
 975 fail_ioc_init:
 976         megasas_free_cmds_fusion(instance);
 977 fail_alloc_cmds:
 978         megasas_free_cmds(instance);
 979 fail_alloc_mfi_cmds:
 980         return 1;
 981 }
 982
 983 /**
 984  * megasas_fire_cmd_fusion -    Sends command to the FW
 985  * @frame_phys_addr :           Physical address of cmd
 986  * @frame_count :               Number of frames for the command
 987  * @regs :                      MFI register set
 988  */
 989 void
 990 megasas_fire_cmd_fusion(struct megasas_instance *instance,
 991                         dma_addr_t req_desc_lo,
 992                         u32 req_desc_hi,
 993                         struct megasas_register_set __iomem *regs)
 994 {
 995         unsigned long flags;
 996
 997         spin_lock_irqsave(&instance->hba_lock, flags);
 998
 999         writel(req_desc_lo,
1000                &(regs)->inbound_low_queue_port);
1001         writel(req_desc_hi, &(regs)->inbound_high_queue_port);
1002         spin_unlock_irqrestore(&instance->hba_lock, flags);
1003 }
1004
1005 /**
1006  * map_cmd_status -     Maps FW cmd status to OS cmd status
1007  * @cmd :               Pointer to cmd
1008  * @status :            status of cmd returned by FW
1009  * @ext_status :        ext status of cmd returned by FW
1010  */
1011
1012 void
1013 map_cmd_status(struct megasas_cmd_fusion *cmd, u8 status, u8 ext_status)
1014 {
1015
1016         switch (status) {
1017
1018         case MFI_STAT_OK:
1019                 cmd->scmd->result = DID_OK << 16;
1020                 break;
1021
1022         case MFI_STAT_SCSI_IO_FAILED:
1023         case MFI_STAT_LD_INIT_IN_PROGRESS:
1024                 cmd->scmd->result = (DID_ERROR << 16) | ext_status;
1025                 break;
1026
1027         case MFI_STAT_SCSI_DONE_WITH_ERROR:
1028
1029                 cmd->scmd->result = (DID_OK << 16) | ext_status;
1030                 if (ext_status == SAM_STAT_CHECK_CONDITION) {
1031                         memset(cmd->scmd->sense_buffer, 0,
1032                                SCSI_SENSE_BUFFERSIZE);
1033                         memcpy(cmd->scmd->sense_buffer, cmd->sense,
1034                                SCSI_SENSE_BUFFERSIZE);
1035                         cmd->scmd->result |= DRIVER_SENSE << 24;
1036                 }
1037                 break;
1038
1039         case MFI_STAT_LD_OFFLINE:
1040         case MFI_STAT_DEVICE_NOT_FOUND:
1041                 cmd->scmd->result = DID_BAD_TARGET << 16;
1042                 break;
1043         case MFI_STAT_CONFIG_SEQ_MISMATCH:
1044                 cmd->scmd->result = DID_IMM_RETRY << 16;
1045                 break;
1046         default:
1047                 printk(KERN_DEBUG "megasas: FW status %#x\n", status);
1048                 cmd->scmd->result = DID_ERROR << 16;
1049                 break;
1050         }
1051 }
1052
1053 /**
1054  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
1055  * @instance:           Adapter soft state
1056  * @scp:                SCSI command from the mid-layer
1057  * @sgl_ptr:            SGL to be filled in
1058  * @cmd:                cmd we are working on
1059  *
1060  * If successful, this function returns the number of SG elements.
1061  */
1062 static int
1063 megasas_make_sgl_fusion(struct megasas_instance *instance,
1064                         struct scsi_cmnd *scp,
1065                         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
1066                         struct megasas_cmd_fusion *cmd)
1067 {
1068         int i, sg_processed, sge_count;
1069         struct scatterlist *os_sgl;
1070         struct fusion_context *fusion;
1071
1072         fusion = instance->ctrl_context;
1073
1074         if (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) {
1075                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
1076                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
1077                 sgl_ptr_end->Flags = 0;
1078         }
1079
1080         sge_count = scsi_dma_map(scp);
1081
1082         BUG_ON(sge_count < 0);
1083
1084         if (sge_count > instance->max_num_sge || !sge_count)
1085                 return sge_count;
1086
1087         scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1088                 sgl_ptr->Length = sg_dma_len(os_sgl);
1089                 sgl_ptr->Address = sg_dma_address(os_sgl);
1090                 sgl_ptr->Flags = 0;
1091                 if (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) {
1092                         if (i == sge_count - 1)
1093                                 sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
1094                 }
1095                 sgl_ptr++;
1096
1097                 sg_processed = i + 1;
1098
1099                 if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
1100                     (sge_count > fusion->max_sge_in_main_msg)) {
1101
1102                         struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
1103                         if (instance->pdev->device ==
1104                             PCI_DEVICE_ID_LSI_INVADER) {
1105                                 if ((cmd->io_request->IoFlags &
1106                                 MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
1107                                 MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
1108                                         cmd->io_request->ChainOffset =
1109                                                 fusion->
1110                                                 chain_offset_io_request;
1111                                 else
1112                                         cmd->io_request->ChainOffset = 0;
1113                         } else
1114                                 cmd->io_request->ChainOffset =
1115                                         fusion->chain_offset_io_request;
1116
1117                         sg_chain = sgl_ptr;
1118                         /* Prepare chain element */
1119                         sg_chain->NextChainOffset = 0;
1120                         if (instance->pdev->device ==
1121                             PCI_DEVICE_ID_LSI_INVADER)
1122                                 sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
1123                         else
1124                                 sg_chain->Flags =
1125                                         (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
1126                                          MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
1127                         sg_chain->Length =  (sizeof(union MPI2_SGE_IO_UNION)
1128                                              *(sge_count - sg_processed));
1129                         sg_chain->Address = cmd->sg_frame_phys_addr;
1130
1131                         sgl_ptr =
1132                           (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
1133                 }
1134         }
1135
1136         return sge_count;
1137 }
1138
1139 /**
1140  * megasas_set_pd_lba - Sets PD LBA
1141  * @cdb:                CDB
1142  * @cdb_len:            cdb length
1143  * @start_blk:          Start block of IO
1144  *
1145  * Used to set the PD LBA in CDB for FP IOs
1146  */
1147 void
1148 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
1149                    struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
1150                    struct MR_FW_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
1151 {
1152         struct MR_LD_RAID *raid;
1153         u32 ld;
1154         u64 start_blk = io_info->pdBlock;
1155         u8 *cdb = io_request->CDB.CDB32;
1156         u32 num_blocks = io_info->numBlocks;
1157         u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
1158
1159         /* Check if T10 PI (DIF) is enabled for this LD */
1160         ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
1161         raid = MR_LdRaidGet(ld, local_map_ptr);
1162         if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
1163                 memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1164                 cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
1165                 cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
1166
1167                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1168                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
1169                 else
1170                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
1171                 cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
1172
1173                 /* LBA */
1174                 cdb[12] = (u8)((start_blk >> 56) & 0xff);
1175                 cdb[13] = (u8)((start_blk >> 48) & 0xff);
1176                 cdb[14] = (u8)((start_blk >> 40) & 0xff);
1177                 cdb[15] = (u8)((start_blk >> 32) & 0xff);
1178                 cdb[16] = (u8)((start_blk >> 24) & 0xff);
1179                 cdb[17] = (u8)((start_blk >> 16) & 0xff);
1180                 cdb[18] = (u8)((start_blk >> 8) & 0xff);
1181                 cdb[19] = (u8)(start_blk & 0xff);
1182
1183                 /* Logical block reference tag */
1184                 io_request->CDB.EEDP32.PrimaryReferenceTag =
1185                         cpu_to_be32(ref_tag);
1186                 io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0xffff;
1187
1188                 io_request->DataLength = num_blocks * 512;
1189                 io_request->IoFlags = 32; /* Specify 32-byte cdb */
1190
1191                 /* Transfer length */
1192                 cdb[28] = (u8)((num_blocks >> 24) & 0xff);
1193                 cdb[29] = (u8)((num_blocks >> 16) & 0xff);
1194                 cdb[30] = (u8)((num_blocks >> 8) & 0xff);
1195                 cdb[31] = (u8)(num_blocks & 0xff);
1196
1197                 /* set SCSI IO EEDPFlags */
1198                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) {
1199                         io_request->EEDPFlags =
1200                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
1201                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
1202                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
1203                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
1204                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD;
1205                 } else {
1206                         io_request->EEDPFlags =
1207                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
1208                                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP;
1209                 }
1210                 io_request->Control |= (0x4 << 26);
1211                 io_request->EEDPBlockSize = MEGASAS_EEDPBLOCKSIZE;
1212         } else {
1213                 /* Some drives don't support 16/12 byte CDB's, convert to 10 */
1214                 if (((cdb_len == 12) || (cdb_len == 16)) &&
1215                     (start_blk <= 0xffffffff)) {
1216                         if (cdb_len == 16) {
1217                                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
1218                                 flagvals = cdb[1];
1219                                 groupnum = cdb[14];
1220                                 control = cdb[15];
1221                         } else {
1222                                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
1223                                 flagvals = cdb[1];
1224                                 groupnum = cdb[10];
1225                                 control = cdb[11];
1226                         }
1227
1228                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1229
1230                         cdb[0] = opcode;
1231                         cdb[1] = flagvals;
1232                         cdb[6] = groupnum;
1233                         cdb[9] = control;
1234
1235                         /* Transfer length */
1236                         cdb[8] = (u8)(num_blocks & 0xff);
1237                         cdb[7] = (u8)((num_blocks >> 8) & 0xff);
1238
1239                         io_request->IoFlags = 10; /* Specify 10-byte cdb */
1240                         cdb_len = 10;
1241                 } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
1242                         /* Convert to 16 byte CDB for large LBA's */
1243                         switch (cdb_len) {
1244                         case 6:
1245                                 opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
1246                                 control = cdb[5];
1247                                 break;
1248                         case 10:
1249                                 opcode =
1250                                         cdb[0] == READ_10 ? READ_16 : WRITE_16;
1251                                 flagvals = cdb[1];
1252                                 groupnum = cdb[6];
1253                                 control = cdb[9];
1254                                 break;
1255                         case 12:
1256                                 opcode =
1257                                         cdb[0] == READ_12 ? READ_16 : WRITE_16;
1258                                 flagvals = cdb[1];
1259                                 groupnum = cdb[10];
1260                                 control = cdb[11];
1261                                 break;
1262                         }
1263
1264                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1265
1266                         cdb[0] = opcode;
1267                         cdb[1] = flagvals;
1268                         cdb[14] = groupnum;
1269                         cdb[15] = control;
1270
1271                         /* Transfer length */
1272                         cdb[13] = (u8)(num_blocks & 0xff);
1273                         cdb[12] = (u8)((num_blocks >> 8) & 0xff);
1274                         cdb[11] = (u8)((num_blocks >> 16) & 0xff);
1275                         cdb[10] = (u8)((num_blocks >> 24) & 0xff);
1276
1277                         io_request->IoFlags = 16; /* Specify 16-byte cdb */
1278                         cdb_len = 16;
1279                 }
1280
1281                 /* Normal case, just load LBA here */
1282                 switch (cdb_len) {
1283                 case 6:
1284                 {
1285                         u8 val = cdb[1] & 0xE0;
1286                         cdb[3] = (u8)(start_blk & 0xff);
1287                         cdb[2] = (u8)((start_blk >> 8) & 0xff);
1288                         cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
1289                         break;
1290                 }
1291                 case 10:
1292                         cdb[5] = (u8)(start_blk & 0xff);
1293                         cdb[4] = (u8)((start_blk >> 8) & 0xff);
1294                         cdb[3] = (u8)((start_blk >> 16) & 0xff);
1295                         cdb[2] = (u8)((start_blk >> 24) & 0xff);
1296                         break;
1297                 case 12:
1298                         cdb[5]    = (u8)(start_blk & 0xff);
1299                         cdb[4]    = (u8)((start_blk >> 8) & 0xff);
1300                         cdb[3]    = (u8)((start_blk >> 16) & 0xff);
1301                         cdb[2]    = (u8)((start_blk >> 24) & 0xff);
1302                         break;
1303                 case 16:
1304                         cdb[9]    = (u8)(start_blk & 0xff);
1305                         cdb[8]    = (u8)((start_blk >> 8) & 0xff);
1306                         cdb[7]    = (u8)((start_blk >> 16) & 0xff);
1307                         cdb[6]    = (u8)((start_blk >> 24) & 0xff);
1308                         cdb[5]    = (u8)((start_blk >> 32) & 0xff);
1309                         cdb[4]    = (u8)((start_blk >> 40) & 0xff);
1310                         cdb[3]    = (u8)((start_blk >> 48) & 0xff);
1311                         cdb[2]    = (u8)((start_blk >> 56) & 0xff);
1312                         break;
1313                 }
1314         }
1315 }
1316
1317 /**
1318  * megasas_build_ldio_fusion -  Prepares IOs to devices
1319  * @instance:           Adapter soft state
1320  * @scp:                SCSI command
1321  * @cmd:                Command to be prepared
1322  *
1323  * Prepares the io_request and chain elements (sg_frame) for IO
1324  * The IO can be for PD (Fast Path) or LD
1325  */
1326 void
1327 megasas_build_ldio_fusion(struct megasas_instance *instance,
1328                           struct scsi_cmnd *scp,
1329                           struct megasas_cmd_fusion *cmd)
1330 {
1331         u8 fp_possible;
1332         u32 start_lba_lo, start_lba_hi, device_id;
1333         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1334         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1335         struct IO_REQUEST_INFO io_info;
1336         struct fusion_context *fusion;
1337         struct MR_FW_RAID_MAP_ALL *local_map_ptr;
1338
1339         device_id = MEGASAS_DEV_INDEX(instance, scp);
1340
1341         fusion = instance->ctrl_context;
1342
1343         io_request = cmd->io_request;
1344         io_request->RaidContext.VirtualDiskTgtId = device_id;
1345         io_request->RaidContext.status = 0;
1346         io_request->RaidContext.exStatus = 0;
1347
1348         req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc;
1349
1350         start_lba_lo = 0;
1351         start_lba_hi = 0;
1352         fp_possible = 0;
1353
1354         /*
1355          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1356          */
1357         if (scp->cmd_len == 6) {
1358                 io_request->DataLength = (u32) scp->cmnd[4];
1359                 start_lba_lo = ((u32) scp->cmnd[1] << 16) |
1360                         ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
1361
1362                 start_lba_lo &= 0x1FFFFF;
1363         }
1364
1365         /*
1366          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1367          */
1368         else if (scp->cmd_len == 10) {
1369                 io_request->DataLength = (u32) scp->cmnd[8] |
1370                         ((u32) scp->cmnd[7] << 8);
1371                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1372                         ((u32) scp->cmnd[3] << 16) |
1373                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1374         }
1375
1376         /*
1377          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1378          */
1379         else if (scp->cmd_len == 12) {
1380                 io_request->DataLength = ((u32) scp->cmnd[6] << 24) |
1381                         ((u32) scp->cmnd[7] << 16) |
1382                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1383                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1384                         ((u32) scp->cmnd[3] << 16) |
1385                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1386         }
1387
1388         /*
1389          * 16-byte READ(0x88) or WRITE(0x8A) cdb
1390          */
1391         else if (scp->cmd_len == 16) {
1392                 io_request->DataLength = ((u32) scp->cmnd[10] << 24) |
1393                         ((u32) scp->cmnd[11] << 16) |
1394                         ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
1395                 start_lba_lo = ((u32) scp->cmnd[6] << 24) |
1396                         ((u32) scp->cmnd[7] << 16) |
1397                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1398
1399                 start_lba_hi = ((u32) scp->cmnd[2] << 24) |
1400                         ((u32) scp->cmnd[3] << 16) |
1401                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1402         }
1403
1404         memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
1405         io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
1406         io_info.numBlocks = io_request->DataLength;
1407         io_info.ldTgtId = device_id;
1408
1409         if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1410                 io_info.isRead = 1;
1411
1412         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
1413
1414         if ((MR_TargetIdToLdGet(device_id, local_map_ptr) >=
1415              MAX_LOGICAL_DRIVES) || (!fusion->fast_path_io)) {
1416                 io_request->RaidContext.regLockFlags  = 0;
1417                 fp_possible = 0;
1418         } else {
1419                 if (MR_BuildRaidContext(instance, &io_info,
1420                                         &io_request->RaidContext,
1421                                         local_map_ptr))
1422                         fp_possible = io_info.fpOkForIo;
1423         }
1424
1425         /* Use smp_processor_id() for now until cmd->request->cpu is CPU
1426            id by default, not CPU group id, otherwise all MSI-X queues won't
1427            be utilized */
1428         cmd->request_desc->SCSIIO.MSIxIndex = instance->msix_vectors ?
1429                 smp_processor_id() % instance->msix_vectors : 0;
1430
1431         if (fp_possible) {
1432                 megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
1433                                    local_map_ptr, start_lba_lo);
1434                 io_request->DataLength = scsi_bufflen(scp);
1435                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
1436                 cmd->request_desc->SCSIIO.RequestFlags =
1437                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY
1438                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1439                 if (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) {
1440                         if (io_request->RaidContext.regLockFlags ==
1441                             REGION_TYPE_UNUSED)
1442                                 cmd->request_desc->SCSIIO.RequestFlags =
1443                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
1444                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1445                         io_request->RaidContext.Type = MPI2_TYPE_CUDA;
1446                         io_request->RaidContext.nseg = 0x1;
1447                         io_request->IoFlags |=
1448                           MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH;
1449                         io_request->RaidContext.regLockFlags |=
1450                           (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
1451                            MR_RL_FLAGS_SEQ_NUM_ENABLE);
1452                 }
1453                 if ((fusion->load_balance_info[device_id].loadBalanceFlag) &&
1454                     (io_info.isRead)) {
1455                         io_info.devHandle =
1456                                 get_updated_dev_handle(
1457                                         &fusion->load_balance_info[device_id],
1458                                         &io_info);
1459                         scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
1460                 } else
1461                         scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
1462                 cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
1463                 io_request->DevHandle = io_info.devHandle;
1464         } else {
1465                 io_request->RaidContext.timeoutValue =
1466                         local_map_ptr->raidMap.fpPdIoTimeoutSec;
1467                 cmd->request_desc->SCSIIO.RequestFlags =
1468                         (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
1469                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1470                 if (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) {
1471                         if (io_request->RaidContext.regLockFlags ==
1472                             REGION_TYPE_UNUSED)
1473                                 cmd->request_desc->SCSIIO.RequestFlags =
1474                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
1475                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1476                         io_request->RaidContext.Type = MPI2_TYPE_CUDA;
1477                         io_request->RaidContext.regLockFlags |=
1478                                 (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
1479                                  MR_RL_FLAGS_SEQ_NUM_ENABLE);
1480                         io_request->RaidContext.nseg = 0x1;
1481                 }
1482                 io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1483                 io_request->DevHandle = device_id;
1484         } /* Not FP */
1485 }
1486
1487 /**
1488  * megasas_build_dcdb_fusion -  Prepares IOs to devices
1489  * @instance:           Adapter soft state
1490  * @scp:                SCSI command
1491  * @cmd:                Command to be prepared
1492  *
1493  * Prepares the io_request frame for non-io cmds
1494  */
1495 static void
1496 megasas_build_dcdb_fusion(struct megasas_instance *instance,
1497                           struct scsi_cmnd *scmd,
1498                           struct megasas_cmd_fusion *cmd)
1499 {
1500         u32 device_id;
1501         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1502         u16 pd_index = 0;
1503         struct MR_FW_RAID_MAP_ALL *local_map_ptr;
1504         struct fusion_context *fusion = instance->ctrl_context;
1505
1506         io_request = cmd->io_request;
1507         device_id = MEGASAS_DEV_INDEX(instance, scmd);
1508         pd_index = (scmd->device->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
1509                 +scmd->device->id;
1510         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
1511
1512         /* Check if this is a system PD I/O */
1513         if (instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
1514                 io_request->Function = 0;
1515                 io_request->DevHandle =
1516                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
1517                 io_request->RaidContext.timeoutValue =
1518                         local_map_ptr->raidMap.fpPdIoTimeoutSec;
1519                 io_request->RaidContext.regLockFlags = 0;
1520                 io_request->RaidContext.regLockRowLBA = 0;
1521                 io_request->RaidContext.regLockLength = 0;
1522                 io_request->RaidContext.RAIDFlags =
1523                         MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD <<
1524                         MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
1525                 cmd->request_desc->SCSIIO.RequestFlags =
1526                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
1527                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1528         } else {
1529                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1530                 io_request->DevHandle = device_id;
1531                 cmd->request_desc->SCSIIO.RequestFlags =
1532                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
1533                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1534         }
1535         io_request->RaidContext.VirtualDiskTgtId = device_id;
1536         io_request->LUN[1] = scmd->device->lun;
1537         io_request->DataLength = scsi_bufflen(scmd);
1538 }
1539
1540 /**
1541  * megasas_build_io_fusion -    Prepares IOs to devices
1542  * @instance:           Adapter soft state
1543  * @scp:                SCSI command
1544  * @cmd:                Command to be prepared
1545  *
1546  * Invokes helper functions to prepare request frames
1547  * and sets flags appropriate for IO/Non-IO cmd
1548  */
1549 int
1550 megasas_build_io_fusion(struct megasas_instance *instance,
1551                         struct scsi_cmnd *scp,
1552                         struct megasas_cmd_fusion *cmd)
1553 {
1554         u32 device_id, sge_count;
1555         struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
1556
1557         device_id = MEGASAS_DEV_INDEX(instance, scp);
1558
1559         /* Zero out some fields so they don't get reused */
1560         io_request->LUN[1] = 0;
1561         io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
1562         io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
1563         io_request->EEDPFlags = 0;
1564         io_request->Control = 0;
1565         io_request->EEDPBlockSize = 0;
1566         io_request->ChainOffset = 0;
1567         io_request->RaidContext.RAIDFlags = 0;
1568         io_request->RaidContext.Type = 0;
1569         io_request->RaidContext.nseg = 0;
1570
1571         memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
1572         /*
1573          * Just the CDB length,rest of the Flags are zero
1574          * This will be modified for FP in build_ldio_fusion
1575          */
1576         io_request->IoFlags = scp->cmd_len;
1577
1578         if (megasas_is_ldio(scp))
1579                 megasas_build_ldio_fusion(instance, scp, cmd);
1580         else
1581                 megasas_build_dcdb_fusion(instance, scp, cmd);
1582
1583         /*
1584          * Construct SGL
1585          */
1586
1587         sge_count =
1588                 megasas_make_sgl_fusion(instance, scp,
1589                                         (struct MPI25_IEEE_SGE_CHAIN64 *)
1590                                         &io_request->SGL, cmd);
1591
1592         if (sge_count > instance->max_num_sge) {
1593                 printk(KERN_ERR "megasas: Error. sge_count (0x%x) exceeds "
1594                        "max (0x%x) allowed\n", sge_count,
1595                        instance->max_num_sge);
1596                 return 1;
1597         }
1598
1599         io_request->RaidContext.numSGE = sge_count;
1600
1601         io_request->SGLFlags = MPI2_SGE_FLAGS_64_BIT_ADDRESSING;
1602
1603         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1604                 io_request->Control |= MPI2_SCSIIO_CONTROL_WRITE;
1605         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1606                 io_request->Control |= MPI2_SCSIIO_CONTROL_READ;
1607
1608         io_request->SGLOffset0 =
1609                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
1610
1611         io_request->SenseBufferLowAddress = cmd->sense_phys_addr;
1612         io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
1613
1614         cmd->scmd = scp;
1615         scp->SCp.ptr = (char *)cmd;
1616
1617         return 0;
1618 }
1619
1620 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
1621 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
1622 {
1623         u8 *p;
1624         struct fusion_context *fusion;
1625
1626         if (index >= instance->max_fw_cmds) {
1627                 printk(KERN_ERR "megasas: Invalid SMID (0x%x)request for "
1628                        "descriptor\n", index);
1629                 return NULL;
1630         }
1631         fusion = instance->ctrl_context;
1632         p = fusion->req_frames_desc
1633                 +sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *index;
1634
1635         return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
1636 }
1637
1638 /**
1639  * megasas_build_and_issue_cmd_fusion -Main routine for building and
1640  *                                     issuing non IOCTL cmd
1641  * @instance:                   Adapter soft state
1642  * @scmd:                       pointer to scsi cmd from OS
1643  */
1644 static u32
1645 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
1646                                    struct scsi_cmnd *scmd)
1647 {
1648         struct megasas_cmd_fusion *cmd;
1649         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1650         u32 index;
1651         struct fusion_context *fusion;
1652
1653         fusion = instance->ctrl_context;
1654
1655         cmd = megasas_get_cmd_fusion(instance);
1656         if (!cmd)
1657                 return SCSI_MLQUEUE_HOST_BUSY;
1658
1659         index = cmd->index;
1660
1661         req_desc = megasas_get_request_descriptor(instance, index-1);
1662         if (!req_desc)
1663                 return 1;
1664
1665         req_desc->Words = 0;
1666         cmd->request_desc = req_desc;
1667
1668         if (megasas_build_io_fusion(instance, scmd, cmd)) {
1669                 megasas_return_cmd_fusion(instance, cmd);
1670                 printk(KERN_ERR "megasas: Error building command.\n");
1671                 cmd->request_desc = NULL;
1672                 return 1;
1673         }
1674
1675         req_desc = cmd->request_desc;
1676         req_desc->SCSIIO.SMID = index;
1677
1678         if (cmd->io_request->ChainOffset != 0 &&
1679             cmd->io_request->ChainOffset != 0xF)
1680                 printk(KERN_ERR "megasas: The chain offset value is not "
1681                        "correct : %x\n", cmd->io_request->ChainOffset);
1682
1683         /*
1684          * Issue the command to the FW
1685          */
1686         atomic_inc(&instance->fw_outstanding);
1687
1688         instance->instancet->fire_cmd(instance,
1689                                       req_desc->u.low, req_desc->u.high,
1690                                       instance->reg_set);
1691
1692         return 0;
1693 }
1694
1695 /**
1696  * complete_cmd_fusion -        Completes command
1697  * @instance:                   Adapter soft state
1698  * Completes all commands that is in reply descriptor queue
1699  */
1700 int
1701 complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
1702 {
1703         union MPI2_REPLY_DESCRIPTORS_UNION *desc;
1704         struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
1705         struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
1706         struct fusion_context *fusion;
1707         struct megasas_cmd *cmd_mfi;
1708         struct megasas_cmd_fusion *cmd_fusion;
1709         u16 smid, num_completed;
1710         u8 reply_descript_type, arm;
1711         u32 status, extStatus, device_id;
1712         union desc_value d_val;
1713         struct LD_LOAD_BALANCE_INFO *lbinfo;
1714
1715         fusion = instance->ctrl_context;
1716
1717         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
1718                 return IRQ_HANDLED;
1719
1720         desc = fusion->reply_frames_desc;
1721         desc += ((MSIxIndex * fusion->reply_alloc_sz)/
1722                  sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)) +
1723                 fusion->last_reply_idx[MSIxIndex];
1724
1725         reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1726
1727         d_val.word = desc->Words;
1728
1729         reply_descript_type = reply_desc->ReplyFlags &
1730                 MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1731
1732         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1733                 return IRQ_NONE;
1734
1735         d_val.word = desc->Words;
1736
1737         num_completed = 0;
1738
1739         while ((d_val.u.low != UINT_MAX) && (d_val.u.high != UINT_MAX)) {
1740                 smid = reply_desc->SMID;
1741
1742                 cmd_fusion = fusion->cmd_list[smid - 1];
1743
1744                 scsi_io_req =
1745                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
1746                   cmd_fusion->io_request;
1747
1748                 if (cmd_fusion->scmd)
1749                         cmd_fusion->scmd->SCp.ptr = NULL;
1750
1751                 status = scsi_io_req->RaidContext.status;
1752                 extStatus = scsi_io_req->RaidContext.exStatus;
1753
1754                 switch (scsi_io_req->Function) {
1755                 case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
1756                         /* Update load balancing info */
1757                         device_id = MEGASAS_DEV_INDEX(instance,
1758                                                       cmd_fusion->scmd);
1759                         lbinfo = &fusion->load_balance_info[device_id];
1760                         if (cmd_fusion->scmd->SCp.Status &
1761                             MEGASAS_LOAD_BALANCE_FLAG) {
1762                                 arm = lbinfo->raid1DevHandle[0] ==
1763                                         cmd_fusion->io_request->DevHandle ? 0 :
1764                                         1;
1765                                 atomic_dec(&lbinfo->scsi_pending_cmds[arm]);
1766                                 cmd_fusion->scmd->SCp.Status &=
1767                                         ~MEGASAS_LOAD_BALANCE_FLAG;
1768                         }
1769                         if (reply_descript_type ==
1770                             MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) {
1771                                 if (megasas_dbg_lvl == 5)
1772                                         printk(KERN_ERR "\nmegasas: FAST Path "
1773                                                "IO Success\n");
1774                         }
1775                         /* Fall thru and complete IO */
1776                 case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
1777                         /* Map the FW Cmd Status */
1778                         map_cmd_status(cmd_fusion, status, extStatus);
1779                         scsi_dma_unmap(cmd_fusion->scmd);
1780                         cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
1781                         scsi_io_req->RaidContext.status = 0;
1782                         scsi_io_req->RaidContext.exStatus = 0;
1783                         megasas_return_cmd_fusion(instance, cmd_fusion);
1784                         atomic_dec(&instance->fw_outstanding);
1785
1786                         break;
1787                 case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
1788                         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
1789                         megasas_complete_cmd(instance, cmd_mfi, DID_OK);
1790                         cmd_fusion->flags = 0;
1791                         megasas_return_cmd_fusion(instance, cmd_fusion);
1792
1793                         break;
1794                 }
1795
1796                 fusion->last_reply_idx[MSIxIndex]++;
1797                 if (fusion->last_reply_idx[MSIxIndex] >=
1798                     fusion->reply_q_depth)
1799                         fusion->last_reply_idx[MSIxIndex] = 0;
1800
1801                 desc->Words = ULLONG_MAX;
1802                 num_completed++;
1803
1804                 /* Get the next reply descriptor */
1805                 if (!fusion->last_reply_idx[MSIxIndex])
1806                         desc = fusion->reply_frames_desc +
1807                                 ((MSIxIndex * fusion->reply_alloc_sz)/
1808                                  sizeof(union MPI2_REPLY_DESCRIPTORS_UNION));
1809                 else
1810                         desc++;
1811
1812                 reply_desc =
1813                   (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1814
1815                 d_val.word = desc->Words;
1816
1817                 reply_descript_type = reply_desc->ReplyFlags &
1818                         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1819
1820                 if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1821                         break;
1822         }
1823
1824         if (!num_completed)
1825                 return IRQ_NONE;
1826
1827         wmb();
1828         writel((MSIxIndex << 24) | fusion->last_reply_idx[MSIxIndex],
1829                &instance->reg_set->reply_post_host_index);
1830         megasas_check_and_restore_queue_depth(instance);
1831         return IRQ_HANDLED;
1832 }
1833
1834 /**
1835  * megasas_complete_cmd_dpc_fusion -    Completes command
1836  * @instance:                   Adapter soft state
1837  *
1838  * Tasklet to complete cmds
1839  */
1840 void
1841 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
1842 {
1843         struct megasas_instance *instance =
1844                 (struct megasas_instance *)instance_addr;
1845         unsigned long flags;
1846         u32 count, MSIxIndex;
1847
1848         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
1849
1850         /* If we have already declared adapter dead, donot complete cmds */
1851         spin_lock_irqsave(&instance->hba_lock, flags);
1852         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
1853                 spin_unlock_irqrestore(&instance->hba_lock, flags);
1854                 return;
1855         }
1856         spin_unlock_irqrestore(&instance->hba_lock, flags);
1857
1858         spin_lock_irqsave(&instance->completion_lock, flags);
1859         for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
1860                 complete_cmd_fusion(instance, MSIxIndex);
1861         spin_unlock_irqrestore(&instance->completion_lock, flags);
1862 }
1863
1864 /**
1865  * megasas_isr_fusion - isr entry point
1866  */
1867 irqreturn_t megasas_isr_fusion(int irq, void *devp)
1868 {
1869         struct megasas_irq_context *irq_context = devp;
1870         struct megasas_instance *instance = irq_context->instance;
1871         u32 mfiStatus, fw_state;
1872
1873         if (!instance->msix_vectors) {
1874                 mfiStatus = instance->instancet->clear_intr(instance->reg_set);
1875                 if (!mfiStatus)
1876                         return IRQ_NONE;
1877         }
1878
1879         /* If we are resetting, bail */
1880         if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
1881                 instance->instancet->clear_intr(instance->reg_set);
1882                 return IRQ_HANDLED;
1883         }
1884
1885         if (!complete_cmd_fusion(instance, irq_context->MSIxIndex)) {
1886                 instance->instancet->clear_intr(instance->reg_set);
1887                 /* If we didn't complete any commands, check for FW fault */
1888                 fw_state = instance->instancet->read_fw_status_reg(
1889                         instance->reg_set) & MFI_STATE_MASK;
1890                 if (fw_state == MFI_STATE_FAULT)
1891                         schedule_work(&instance->work_init);
1892         }
1893
1894         return IRQ_HANDLED;
1895 }
1896
1897 /**
1898  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
1899  * @instance:                   Adapter soft state
1900  * mfi_cmd:                     megasas_cmd pointer
1901  *
1902  */
1903 u8
1904 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
1905                         struct megasas_cmd *mfi_cmd)
1906 {
1907         struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
1908         struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
1909         struct megasas_cmd_fusion *cmd;
1910         struct fusion_context *fusion;
1911         struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
1912
1913         cmd = megasas_get_cmd_fusion(instance);
1914         if (!cmd)
1915                 return 1;
1916
1917         /*  Save the smid. To be used for returning the cmd */
1918         mfi_cmd->context.smid = cmd->index;
1919
1920         cmd->sync_cmd_idx = mfi_cmd->index;
1921
1922         /*
1923          * For cmds where the flag is set, store the flag and check
1924          * on completion. For cmds with this flag, don't call
1925          * megasas_complete_cmd
1926          */
1927
1928         if (frame_hdr->flags & MFI_FRAME_DONT_POST_IN_REPLY_QUEUE)
1929                 cmd->flags = MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
1930
1931         fusion = instance->ctrl_context;
1932         io_req = cmd->io_request;
1933
1934         if (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) {
1935                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
1936                         (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
1937                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
1938                 sgl_ptr_end->Flags = 0;
1939         }
1940
1941         mpi25_ieee_chain =
1942           (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
1943
1944         io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
1945         io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
1946                                        SGL) / 4;
1947         io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
1948
1949         mpi25_ieee_chain->Address = mfi_cmd->frame_phys_addr;
1950
1951         mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
1952                 MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
1953
1954         mpi25_ieee_chain->Length = MEGASAS_MAX_SZ_CHAIN_FRAME;
1955
1956         return 0;
1957 }
1958
1959 /**
1960  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
1961  * @instance:                   Adapter soft state
1962  * @cmd:                        mfi cmd to build
1963  *
1964  */
1965 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
1966 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
1967 {
1968         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1969         u16 index;
1970
1971         if (build_mpt_mfi_pass_thru(instance, cmd)) {
1972                 printk(KERN_ERR "Couldn't build MFI pass thru cmd\n");
1973                 return NULL;
1974         }
1975
1976         index = cmd->context.smid;
1977
1978         req_desc = megasas_get_request_descriptor(instance, index - 1);
1979
1980         if (!req_desc)
1981                 return NULL;
1982
1983         req_desc->Words = 0;
1984         req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
1985                                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1986
1987         req_desc->SCSIIO.SMID = index;
1988
1989         return req_desc;
1990 }
1991
1992 /**
1993  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
1994  * @instance:                   Adapter soft state
1995  * @cmd:                        mfi cmd pointer
1996  *
1997  */
1998 void
1999 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
2000                           struct megasas_cmd *cmd)
2001 {
2002         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2003
2004         req_desc = build_mpt_cmd(instance, cmd);
2005         if (!req_desc) {
2006                 printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
2007                 return;
2008         }
2009         instance->instancet->fire_cmd(instance, req_desc->u.low,
2010                                       req_desc->u.high, instance->reg_set);
2011 }
2012
2013 /**
2014  * megasas_release_fusion -     Reverses the FW initialization
2015  * @intance:                    Adapter soft state
2016  */
2017 void
2018 megasas_release_fusion(struct megasas_instance *instance)
2019 {
2020         megasas_free_cmds(instance);
2021         megasas_free_cmds_fusion(instance);
2022
2023         iounmap(instance->reg_set);
2024
2025         pci_release_selected_regions(instance->pdev, instance->bar);
2026 }
2027
2028 /**
2029  * megasas_read_fw_status_reg_fusion - returns the current FW status value
2030  * @regs:                       MFI register set
2031  */
2032 static u32
2033 megasas_read_fw_status_reg_fusion(struct megasas_register_set __iomem *regs)
2034 {
2035         return readl(&(regs)->outbound_scratch_pad);
2036 }
2037
2038 /**
2039  * megasas_adp_reset_fusion -   For controller reset
2040  * @regs:                               MFI register set
2041  */
2042 static int
2043 megasas_adp_reset_fusion(struct megasas_instance *instance,
2044                          struct megasas_register_set __iomem *regs)
2045 {
2046         return 0;
2047 }
2048
2049 /**
2050  * megasas_check_reset_fusion - For controller reset check
2051  * @regs:                               MFI register set
2052  */
2053 static int
2054 megasas_check_reset_fusion(struct megasas_instance *instance,
2055                            struct megasas_register_set __iomem *regs)
2056 {
2057         return 0;
2058 }
2059
2060 /* This function waits for outstanding commands on fusion to complete */
2061 int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance)
2062 {
2063         int i, outstanding, retval = 0;
2064         u32 fw_state;
2065
2066         for (i = 0; i < resetwaittime; i++) {
2067                 /* Check if firmware is in fault state */
2068                 fw_state = instance->instancet->read_fw_status_reg(
2069                         instance->reg_set) & MFI_STATE_MASK;
2070                 if (fw_state == MFI_STATE_FAULT) {
2071                         printk(KERN_WARNING "megasas: Found FW in FAULT state,"
2072                                " will reset adapter.\n");
2073                         retval = 1;
2074                         goto out;
2075                 }
2076
2077                 outstanding = atomic_read(&instance->fw_outstanding);
2078                 if (!outstanding)
2079                         goto out;
2080
2081                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
2082                         printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
2083                                "commands to complete\n", i, outstanding);
2084                         megasas_complete_cmd_dpc_fusion(
2085                                 (unsigned long)instance);
2086                 }
2087                 msleep(1000);
2088         }
2089
2090         if (atomic_read(&instance->fw_outstanding)) {
2091                 printk("megaraid_sas: pending commands remain after waiting, "
2092                        "will reset adapter.\n");
2093                 retval = 1;
2094         }
2095 out:
2096         return retval;
2097 }
2098
2099 void  megasas_reset_reply_desc(struct megasas_instance *instance)
2100 {
2101         int i, count;
2102         struct fusion_context *fusion;
2103         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
2104
2105         fusion = instance->ctrl_context;
2106         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
2107         for (i = 0 ; i < count ; i++)
2108                 fusion->last_reply_idx[i] = 0;
2109         reply_desc = fusion->reply_frames_desc;
2110         for (i = 0 ; i < fusion->reply_q_depth * count; i++, reply_desc++)
2111                 reply_desc->Words = ULLONG_MAX;
2112 }
2113
2114 /* Core fusion reset function */
2115 int megasas_reset_fusion(struct Scsi_Host *shost)
2116 {
2117         int retval = SUCCESS, i, j, retry = 0;
2118         struct megasas_instance *instance;
2119         struct megasas_cmd_fusion *cmd_fusion;
2120         struct fusion_context *fusion;
2121         struct megasas_cmd *cmd_mfi;
2122         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2123         u32 host_diag, abs_state, status_reg, reset_adapter;
2124
2125         instance = (struct megasas_instance *)shost->hostdata;
2126         fusion = instance->ctrl_context;
2127
2128         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2129                 printk(KERN_WARNING "megaraid_sas: Hardware critical error, "
2130                        "returning FAILED.\n");
2131                 return FAILED;
2132         }
2133
2134         mutex_lock(&instance->reset_mutex);
2135         set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2136         instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
2137         instance->instancet->disable_intr(instance->reg_set);
2138         msleep(1000);
2139
2140         /* First try waiting for commands to complete */
2141         if (megasas_wait_for_outstanding_fusion(instance)) {
2142                 printk(KERN_WARNING "megaraid_sas: resetting fusion "
2143                        "adapter.\n");
2144                 /* Now return commands back to the OS */
2145                 for (i = 0 ; i < instance->max_fw_cmds; i++) {
2146                         cmd_fusion = fusion->cmd_list[i];
2147                         if (cmd_fusion->scmd) {
2148                                 scsi_dma_unmap(cmd_fusion->scmd);
2149                                 cmd_fusion->scmd->result = (DID_RESET << 16);
2150                                 cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
2151                                 megasas_return_cmd_fusion(instance, cmd_fusion);
2152                                 atomic_dec(&instance->fw_outstanding);
2153                         }
2154                 }
2155
2156                 status_reg = instance->instancet->read_fw_status_reg(
2157                         instance->reg_set);
2158                 abs_state = status_reg & MFI_STATE_MASK;
2159                 reset_adapter = status_reg & MFI_RESET_ADAPTER;
2160                 if (instance->disableOnlineCtrlReset ||
2161                     (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
2162                         /* Reset not supported, kill adapter */
2163                         printk(KERN_WARNING "megaraid_sas: Reset not supported"
2164                                ", killing adapter.\n");
2165                         megaraid_sas_kill_hba(instance);
2166                         instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
2167                         retval = FAILED;
2168                         goto out;
2169                 }
2170
2171                 /* Now try to reset the chip */
2172                 for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
2173                         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE,
2174                                &instance->reg_set->fusion_seq_offset);
2175                         writel(MPI2_WRSEQ_1ST_KEY_VALUE,
2176                                &instance->reg_set->fusion_seq_offset);
2177                         writel(MPI2_WRSEQ_2ND_KEY_VALUE,
2178                                &instance->reg_set->fusion_seq_offset);
2179                         writel(MPI2_WRSEQ_3RD_KEY_VALUE,
2180                                &instance->reg_set->fusion_seq_offset);
2181                         writel(MPI2_WRSEQ_4TH_KEY_VALUE,
2182                                &instance->reg_set->fusion_seq_offset);
2183                         writel(MPI2_WRSEQ_5TH_KEY_VALUE,
2184                                &instance->reg_set->fusion_seq_offset);
2185                         writel(MPI2_WRSEQ_6TH_KEY_VALUE,
2186                                &instance->reg_set->fusion_seq_offset);
2187
2188                         /* Check that the diag write enable (DRWE) bit is on */
2189                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2190                         retry = 0;
2191                         while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
2192                                 msleep(100);
2193                                 host_diag =
2194                                 readl(&instance->reg_set->fusion_host_diag);
2195                                 if (retry++ == 100) {
2196                                         printk(KERN_WARNING "megaraid_sas: "
2197                                                "Host diag unlock failed!\n");
2198                                         break;
2199                                 }
2200                         }
2201                         if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
2202                                 continue;
2203
2204                         /* Send chip reset command */
2205                         writel(host_diag | HOST_DIAG_RESET_ADAPTER,
2206                                &instance->reg_set->fusion_host_diag);
2207                         msleep(3000);
2208
2209                         /* Make sure reset adapter bit is cleared */
2210                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2211                         retry = 0;
2212                         while (host_diag & HOST_DIAG_RESET_ADAPTER) {
2213                                 msleep(100);
2214                                 host_diag =
2215                                 readl(&instance->reg_set->fusion_host_diag);
2216                                 if (retry++ == 1000) {
2217                                         printk(KERN_WARNING "megaraid_sas: "
2218                                                "Diag reset adapter never "
2219                                                "cleared!\n");
2220                                         break;
2221                                 }
2222                         }
2223                         if (host_diag & HOST_DIAG_RESET_ADAPTER)
2224                                 continue;
2225
2226                         abs_state =
2227                                 instance->instancet->read_fw_status_reg(
2228                                         instance->reg_set) & MFI_STATE_MASK;
2229                         retry = 0;
2230
2231                         while ((abs_state <= MFI_STATE_FW_INIT) &&
2232                                (retry++ < 1000)) {
2233                                 msleep(100);
2234                                 abs_state =
2235                                 instance->instancet->read_fw_status_reg(
2236                                         instance->reg_set) & MFI_STATE_MASK;
2237                         }
2238                         if (abs_state <= MFI_STATE_FW_INIT) {
2239                                 printk(KERN_WARNING "megaraid_sas: firmware "
2240                                        "state < MFI_STATE_FW_INIT, state = "
2241                                        "0x%x\n", abs_state);
2242                                 continue;
2243                         }
2244
2245                         /* Wait for FW to become ready */
2246                         if (megasas_transition_to_ready(instance, 1)) {
2247                                 printk(KERN_WARNING "megaraid_sas: Failed to "
2248                                        "transition controller to ready.\n");
2249                                 continue;
2250                         }
2251
2252                         megasas_reset_reply_desc(instance);
2253                         if (megasas_ioc_init_fusion(instance)) {
2254                                 printk(KERN_WARNING "megaraid_sas: "
2255                                        "megasas_ioc_init_fusion() failed!\n");
2256                                 continue;
2257                         }
2258
2259                         clear_bit(MEGASAS_FUSION_IN_RESET,
2260                                   &instance->reset_flags);
2261                         instance->instancet->enable_intr(instance->reg_set);
2262                         instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2263
2264                         /* Re-fire management commands */
2265                         for (j = 0 ; j < instance->max_fw_cmds; j++) {
2266                                 cmd_fusion = fusion->cmd_list[j];
2267                                 if (cmd_fusion->sync_cmd_idx !=
2268                                     (u32)ULONG_MAX) {
2269                                         cmd_mfi =
2270                                         instance->
2271                                         cmd_list[cmd_fusion->sync_cmd_idx];
2272                                         if (cmd_mfi->frame->dcmd.opcode ==
2273                                             MR_DCMD_LD_MAP_GET_INFO) {
2274                                                 megasas_return_cmd(instance,
2275                                                                    cmd_mfi);
2276                                                 megasas_return_cmd_fusion(
2277                                                         instance, cmd_fusion);
2278                                         } else  {
2279                                                 req_desc =
2280                                                 megasas_get_request_descriptor(
2281                                                         instance,
2282                                                         cmd_mfi->context.smid
2283                                                         -1);
2284                                                 if (!req_desc)
2285                                                         printk(KERN_WARNING
2286                                                                "req_desc NULL"
2287                                                                "\n");
2288                                                 else {
2289                                                         instance->instancet->
2290                                                         fire_cmd(instance,
2291                                                                  req_desc->
2292                                                                  u.low,
2293                                                                  req_desc->
2294                                                                  u.high,
2295                                                                  instance->
2296                                                                  reg_set);
2297                                                 }
2298                                         }
2299                                 }
2300                         }
2301
2302                         /* Reset load balance info */
2303                         memset(fusion->load_balance_info, 0,
2304                                sizeof(struct LD_LOAD_BALANCE_INFO)
2305                                *MAX_LOGICAL_DRIVES);
2306
2307                         if (!megasas_get_map_info(instance))
2308                                 megasas_sync_map_info(instance);
2309
2310                         /* Adapter reset completed successfully */
2311                         printk(KERN_WARNING "megaraid_sas: Reset "
2312                                "successful.\n");
2313                         retval = SUCCESS;
2314                         goto out;
2315                 }
2316                 /* Reset failed, kill the adapter */
2317                 printk(KERN_WARNING "megaraid_sas: Reset failed, killing "
2318                        "adapter.\n");
2319                 megaraid_sas_kill_hba(instance);
2320                 retval = FAILED;
2321         } else {
2322                 clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2323                 instance->instancet->enable_intr(instance->reg_set);
2324                 instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2325         }
2326 out:
2327         clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2328         mutex_unlock(&instance->reset_mutex);
2329         return retval;
2330 }
2331
2332 /* Fusion OCR work queue */
2333 void megasas_fusion_ocr_wq(struct work_struct *work)
2334 {
2335         struct megasas_instance *instance =
2336                 container_of(work, struct megasas_instance, work_init);
2337
2338         megasas_reset_fusion(instance->host);
2339 }
2340
2341 struct megasas_instance_template megasas_instance_template_fusion = {
2342         .fire_cmd = megasas_fire_cmd_fusion,
2343         .enable_intr = megasas_enable_intr_fusion,
2344         .disable_intr = megasas_disable_intr_fusion,
2345         .clear_intr = megasas_clear_intr_fusion,
2346         .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
2347         .adp_reset = megasas_adp_reset_fusion,
2348         .check_reset = megasas_check_reset_fusion,
2349         .service_isr = megasas_isr_fusion,
2350         .tasklet = megasas_complete_cmd_dpc_fusion,
2351         .init_adapter = megasas_init_adapter_fusion,
2352         .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
2353         .issue_dcmd = megasas_issue_dcmd_fusion,
2354 };