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
  98 /**
  99  * megasas_enable_intr_fusion - Enables interrupts
 100  * @regs:                       MFI register set
 101  */
 102 void
 103 megasas_enable_intr_fusion(struct megasas_register_set __iomem *regs)
 104 {
 105         /* For Thunderbolt/Invader also clear intr on enable */
 106         writel(~0, &regs->outbound_intr_status);
 107         readl(&regs->outbound_intr_status);
 108
 109         writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 110
 111         /* Dummy readl to force pci flush */
 112         readl(&regs->outbound_intr_mask);
 113 }
 114
 115 /**
 116  * megasas_disable_intr_fusion - Disables interrupt
 117  * @regs:                        MFI register set
 118  */
 119 void
 120 megasas_disable_intr_fusion(struct megasas_register_set __iomem *regs)
 121 {
 122         u32 mask = 0xFFFFFFFF;
 123         u32 status;
 124
 125         writel(mask, &regs->outbound_intr_mask);
 126         /* Dummy readl to force pci flush */
 127         status = readl(&regs->outbound_intr_mask);
 128 }
 129
 130 int
 131 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs)
 132 {
 133         u32 status;
 134         /*
 135          * Check if it is our interrupt
 136          */
 137         status = readl(&regs->outbound_intr_status);
 138
 139         if (status & 1) {
 140                 writel(status, &regs->outbound_intr_status);
 141                 readl(&regs->outbound_intr_status);
 142                 return 1;
 143         }
 144         if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
 145                 return 0;
 146
 147         return 1;
 148 }
 149
 150 /**
 151  * megasas_get_cmd_fusion -     Get a command from the free pool
 152  * @instance:           Adapter soft state
 153  *
 154  * Returns a free command from the pool
 155  */
 156 struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 157                                                   *instance)
 158 {
 159         unsigned long flags;
 160         struct fusion_context *fusion =
 161                 (struct fusion_context *)instance->ctrl_context;
 162         struct megasas_cmd_fusion *cmd = NULL;
 163
 164         spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
 165
 166         if (!list_empty(&fusion->cmd_pool)) {
 167                 cmd = list_entry((&fusion->cmd_pool)->next,
 168                                  struct megasas_cmd_fusion, list);
 169                 list_del_init(&cmd->list);
 170         } else {
 171                 printk(KERN_ERR "megasas: Command pool (fusion) empty!\n");
 172         }
 173
 174         spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
 175         return cmd;
 176 }
 177
 178 /**
 179  * megasas_return_cmd_fusion -  Return a cmd to free command pool
 180  * @instance:           Adapter soft state
 181  * @cmd:                Command packet to be returned to free command pool
 182  */
 183 static inline void
 184 megasas_return_cmd_fusion(struct megasas_instance *instance,
 185                           struct megasas_cmd_fusion *cmd)
 186 {
 187         unsigned long flags;
 188         struct fusion_context *fusion =
 189                 (struct fusion_context *)instance->ctrl_context;
 190
 191         spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
 192
 193         cmd->scmd = NULL;
 194         cmd->sync_cmd_idx = (u32)ULONG_MAX;
 195         list_add_tail(&cmd->list, &fusion->cmd_pool);
 196
 197         spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
 198 }
 199
 200 /**
 201  * megasas_teardown_frame_pool_fusion - Destroy the cmd frame DMA pool
 202  * @instance:                           Adapter soft state
 203  */
 204 static void megasas_teardown_frame_pool_fusion(
 205         struct megasas_instance *instance)
 206 {
 207         int i;
 208         struct fusion_context *fusion = instance->ctrl_context;
 209
 210         u16 max_cmd = instance->max_fw_cmds;
 211
 212         struct megasas_cmd_fusion *cmd;
 213
 214         if (!fusion->sg_dma_pool || !fusion->sense_dma_pool) {
 215                 printk(KERN_ERR "megasas: dma pool is null. SG Pool %p, "
 216                        "sense pool : %p\n", fusion->sg_dma_pool,
 217                        fusion->sense_dma_pool);
 218                 return;
 219         }
 220
 221         /*
 222          * Return all frames to pool
 223          */
 224         for (i = 0; i < max_cmd; i++) {
 225
 226                 cmd = fusion->cmd_list[i];
 227
 228                 if (cmd->sg_frame)
 229                         pci_pool_free(fusion->sg_dma_pool, cmd->sg_frame,
 230                                       cmd->sg_frame_phys_addr);
 231
 232                 if (cmd->sense)
 233                         pci_pool_free(fusion->sense_dma_pool, cmd->sense,
 234                                       cmd->sense_phys_addr);
 235         }
 236
 237         /*
 238          * Now destroy the pool itself
 239          */
 240         pci_pool_destroy(fusion->sg_dma_pool);
 241         pci_pool_destroy(fusion->sense_dma_pool);
 242
 243         fusion->sg_dma_pool = NULL;
 244         fusion->sense_dma_pool = NULL;
 245 }
 246
 247 /**
 248  * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
 249  * @instance:           Adapter soft state
 250  */
 251 void
 252 megasas_free_cmds_fusion(struct megasas_instance *instance)
 253 {
 254         int i;
 255         struct fusion_context *fusion = instance->ctrl_context;
 256
 257         u32 max_cmds, req_sz, reply_sz, io_frames_sz;
 258
 259
 260         req_sz = fusion->request_alloc_sz;
 261         reply_sz = fusion->reply_alloc_sz;
 262         io_frames_sz = fusion->io_frames_alloc_sz;
 263
 264         max_cmds = instance->max_fw_cmds;
 265
 266         /* Free descriptors and request Frames memory */
 267         if (fusion->req_frames_desc)
 268                 dma_free_coherent(&instance->pdev->dev, req_sz,
 269                                   fusion->req_frames_desc,
 270                                   fusion->req_frames_desc_phys);
 271
 272         if (fusion->reply_frames_desc) {
 273                 pci_pool_free(fusion->reply_frames_desc_pool,
 274                               fusion->reply_frames_desc,
 275                               fusion->reply_frames_desc_phys);
 276                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 277         }
 278
 279         if (fusion->io_request_frames) {
 280                 pci_pool_free(fusion->io_request_frames_pool,
 281                               fusion->io_request_frames,
 282                               fusion->io_request_frames_phys);
 283                 pci_pool_destroy(fusion->io_request_frames_pool);
 284         }
 285
 286         /* Free the Fusion frame pool */
 287         megasas_teardown_frame_pool_fusion(instance);
 288
 289         /* Free all the commands in the cmd_list */
 290         for (i = 0; i < max_cmds; i++)
 291                 kfree(fusion->cmd_list[i]);
 292
 293         /* Free the cmd_list buffer itself */
 294         kfree(fusion->cmd_list);
 295         fusion->cmd_list = NULL;
 296
 297         INIT_LIST_HEAD(&fusion->cmd_pool);
 298 }
 299
 300 /**
 301  * megasas_create_frame_pool_fusion -   Creates DMA pool for cmd frames
 302  * @instance:                   Adapter soft state
 303  *
 304  */
 305 static int megasas_create_frame_pool_fusion(struct megasas_instance *instance)
 306 {
 307         int i;
 308         u32 max_cmd;
 309         struct fusion_context *fusion;
 310         struct megasas_cmd_fusion *cmd;
 311         u32 total_sz_chain_frame;
 312
 313         fusion = instance->ctrl_context;
 314         max_cmd = instance->max_fw_cmds;
 315
 316         total_sz_chain_frame = MEGASAS_MAX_SZ_CHAIN_FRAME;
 317
 318         /*
 319          * Use DMA pool facility provided by PCI layer
 320          */
 321
 322         fusion->sg_dma_pool = pci_pool_create("megasas sg pool fusion",
 323                                               instance->pdev,
 324                                               total_sz_chain_frame, 4,
 325                                               0);
 326         if (!fusion->sg_dma_pool) {
 327                 printk(KERN_DEBUG "megasas: failed to setup request pool "
 328                        "fusion\n");
 329                 return -ENOMEM;
 330         }
 331         fusion->sense_dma_pool = pci_pool_create("megasas sense pool fusion",
 332                                                  instance->pdev,
 333                                                  SCSI_SENSE_BUFFERSIZE, 64, 0);
 334
 335         if (!fusion->sense_dma_pool) {
 336                 printk(KERN_DEBUG "megasas: failed to setup sense pool "
 337                        "fusion\n");
 338                 pci_pool_destroy(fusion->sg_dma_pool);
 339                 fusion->sg_dma_pool = NULL;
 340                 return -ENOMEM;
 341         }
 342
 343         /*
 344          * Allocate and attach a frame to each of the commands in cmd_list
 345          */
 346         for (i = 0; i < max_cmd; i++) {
 347
 348                 cmd = fusion->cmd_list[i];
 349
 350                 cmd->sg_frame = pci_pool_alloc(fusion->sg_dma_pool,
 351                                                GFP_KERNEL,
 352                                                &cmd->sg_frame_phys_addr);
 353
 354                 cmd->sense = pci_pool_alloc(fusion->sense_dma_pool,
 355                                             GFP_KERNEL, &cmd->sense_phys_addr);
 356                 /*
 357                  * megasas_teardown_frame_pool_fusion() takes care of freeing
 358                  * whatever has been allocated
 359                  */
 360                 if (!cmd->sg_frame || !cmd->sense) {
 361                         printk(KERN_DEBUG "megasas: pci_pool_alloc failed\n");
 362                         megasas_teardown_frame_pool_fusion(instance);
 363                         return -ENOMEM;
 364                 }
 365         }
 366         return 0;
 367 }
 368
 369 /**
 370  * megasas_alloc_cmds_fusion -  Allocates the command packets
 371  * @instance:           Adapter soft state
 372  *
 373  *
 374  * Each frame has a 32-bit field called context. This context is used to get
 375  * back the megasas_cmd_fusion from the frame when a frame gets completed
 376  * In this driver, the 32 bit values are the indices into an array cmd_list.
 377  * This array is used only to look up the megasas_cmd_fusion given the context.
 378  * The free commands themselves are maintained in a linked list called cmd_pool.
 379  *
 380  * cmds are formed in the io_request and sg_frame members of the
 381  * megasas_cmd_fusion. The context field is used to get a request descriptor
 382  * and is used as SMID of the cmd.
 383  * SMID value range is from 1 to max_fw_cmds.
 384  */
 385 int
 386 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 387 {
 388         int i, j, count;
 389         u32 max_cmd, io_frames_sz;
 390         struct fusion_context *fusion;
 391         struct megasas_cmd_fusion *cmd;
 392         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 393         u32 offset;
 394         dma_addr_t io_req_base_phys;
 395         u8 *io_req_base;
 396
 397         fusion = instance->ctrl_context;
 398
 399         max_cmd = instance->max_fw_cmds;
 400
 401         fusion->req_frames_desc =
 402                 dma_alloc_coherent(&instance->pdev->dev,
 403                                    fusion->request_alloc_sz,
 404                                    &fusion->req_frames_desc_phys, GFP_KERNEL);
 405
 406         if (!fusion->req_frames_desc) {
 407                 printk(KERN_ERR "megasas; Could not allocate memory for "
 408                        "request_frames\n");
 409                 goto fail_req_desc;
 410         }
 411
 412         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 413         fusion->reply_frames_desc_pool =
 414                 pci_pool_create("reply_frames pool", instance->pdev,
 415                                 fusion->reply_alloc_sz * count, 16, 0);
 416
 417         if (!fusion->reply_frames_desc_pool) {
 418                 printk(KERN_ERR "megasas; Could not allocate memory for "
 419                        "reply_frame pool\n");
 420                 goto fail_reply_desc;
 421         }
 422
 423         fusion->reply_frames_desc =
 424                 pci_pool_alloc(fusion->reply_frames_desc_pool, GFP_KERNEL,
 425                                &fusion->reply_frames_desc_phys);
 426         if (!fusion->reply_frames_desc) {
 427                 printk(KERN_ERR "megasas; Could not allocate memory for "
 428                        "reply_frame pool\n");
 429                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 430                 goto fail_reply_desc;
 431         }
 432
 433         reply_desc = fusion->reply_frames_desc;
 434         for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
 435                 reply_desc->Words = ULLONG_MAX;
 436
 437         io_frames_sz = fusion->io_frames_alloc_sz;
 438
 439         fusion->io_request_frames_pool =
 440                 pci_pool_create("io_request_frames pool", instance->pdev,
 441                                 fusion->io_frames_alloc_sz, 16, 0);
 442
 443         if (!fusion->io_request_frames_pool) {
 444                 printk(KERN_ERR "megasas: Could not allocate memory for "
 445                        "io_request_frame pool\n");
 446                 goto fail_io_frames;
 447         }
 448
 449         fusion->io_request_frames =
 450                 pci_pool_alloc(fusion->io_request_frames_pool, GFP_KERNEL,
 451                                &fusion->io_request_frames_phys);
 452         if (!fusion->io_request_frames) {
 453                 printk(KERN_ERR "megasas: Could not allocate memory for "
 454                        "io_request_frames frames\n");
 455                 pci_pool_destroy(fusion->io_request_frames_pool);
 456                 goto fail_io_frames;
 457         }
 458
 459         /*
 460          * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
 461          * Allocate the dynamic array first and then allocate individual
 462          * commands.
 463          */
 464         fusion->cmd_list = kmalloc(sizeof(struct megasas_cmd_fusion *)
 465                                    *max_cmd, GFP_KERNEL);
 466
 467         if (!fusion->cmd_list) {
 468                 printk(KERN_DEBUG "megasas: out of memory. Could not alloc "
 469                        "memory for cmd_list_fusion\n");
 470                 goto fail_cmd_list;
 471         }
 472
 473         memset(fusion->cmd_list, 0, sizeof(struct megasas_cmd_fusion *)
 474                *max_cmd);
 475
 476         max_cmd = instance->max_fw_cmds;
 477         for (i = 0; i < max_cmd; i++) {
 478                 fusion->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd_fusion),
 479                                               GFP_KERNEL);
 480                 if (!fusion->cmd_list[i]) {
 481                         printk(KERN_ERR "Could not alloc cmd list fusion\n");
 482
 483                         for (j = 0; j < i; j++)
 484                                 kfree(fusion->cmd_list[j]);
 485
 486                         kfree(fusion->cmd_list);
 487                         fusion->cmd_list = NULL;
 488                         goto fail_cmd_list;
 489                 }
 490         }
 491
 492         /* The first 256 bytes (SMID 0) is not used. Don't add to cmd list */
 493         io_req_base = fusion->io_request_frames +
 494                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 495         io_req_base_phys = fusion->io_request_frames_phys +
 496                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 497
 498         /*
 499          * Add all the commands to command pool (fusion->cmd_pool)
 500          */
 501
 502         /* SMID 0 is reserved. Set SMID/index from 1 */
 503         for (i = 0; i < max_cmd; i++) {
 504                 cmd = fusion->cmd_list[i];
 505                 offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
 506                 memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 507                 cmd->index = i + 1;
 508                 cmd->scmd = NULL;
 509                 cmd->sync_cmd_idx = (u32)ULONG_MAX; /* Set to Invalid */
 510                 cmd->instance = instance;
 511                 cmd->io_request =
 512                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
 513                   (io_req_base + offset);
 514                 memset(cmd->io_request, 0,
 515                        sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 516                 cmd->io_request_phys_addr = io_req_base_phys + offset;
 517
 518                 list_add_tail(&cmd->list, &fusion->cmd_pool);
 519         }
 520
 521         /*
 522          * Create a frame pool and assign one frame to each cmd
 523          */
 524         if (megasas_create_frame_pool_fusion(instance)) {
 525                 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
 526                 megasas_free_cmds_fusion(instance);
 527                 goto fail_req_desc;
 528         }
 529
 530         return 0;
 531
 532 fail_cmd_list:
 533         pci_pool_free(fusion->io_request_frames_pool, fusion->io_request_frames,
 534                       fusion->io_request_frames_phys);
 535         pci_pool_destroy(fusion->io_request_frames_pool);
 536 fail_io_frames:
 537         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 538                           fusion->reply_frames_desc,
 539                           fusion->reply_frames_desc_phys);
 540         pci_pool_free(fusion->reply_frames_desc_pool,
 541                       fusion->reply_frames_desc,
 542                       fusion->reply_frames_desc_phys);
 543         pci_pool_destroy(fusion->reply_frames_desc_pool);
 544
 545 fail_reply_desc:
 546         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 547                           fusion->req_frames_desc,
 548                           fusion->req_frames_desc_phys);
 549 fail_req_desc:
 550         return -ENOMEM;
 551 }
 552
 553 /**
 554  * wait_and_poll -      Issues a polling command
 555  * @instance:                   Adapter soft state
 556  * @cmd:                        Command packet to be issued
 557  *
 558  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
 559  */
 560 int
 561 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd)
 562 {
 563         int i;
 564         struct megasas_header *frame_hdr = &cmd->frame->hdr;
 565
 566         u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
 567
 568         /*
 569          * Wait for cmd_status to change
 570          */
 571         for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
 572                 rmb();
 573                 msleep(20);
 574         }
 575
 576         if (frame_hdr->cmd_status == 0xff)
 577                 return -ETIME;
 578
 579         return 0;
 580 }
 581
 582 /**
 583  * megasas_ioc_init_fusion -    Initializes the FW
 584  * @instance:           Adapter soft state
 585  *
 586  * Issues the IOC Init cmd
 587  */
 588 int
 589 megasas_ioc_init_fusion(struct megasas_instance *instance)
 590 {
 591         struct megasas_init_frame *init_frame;
 592         struct MPI2_IOC_INIT_REQUEST *IOCInitMessage;
 593         dma_addr_t      ioc_init_handle;
 594         struct megasas_cmd *cmd;
 595         u8 ret;
 596         struct fusion_context *fusion;
 597         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
 598         int i;
 599         struct megasas_header *frame_hdr;
 600
 601         fusion = instance->ctrl_context;
 602
 603         cmd = megasas_get_cmd(instance);
 604
 605         if (!cmd) {
 606                 printk(KERN_ERR "Could not allocate cmd for INIT Frame\n");
 607                 ret = 1;
 608                 goto fail_get_cmd;
 609         }
 610
 611         IOCInitMessage =
 612           dma_alloc_coherent(&instance->pdev->dev,
 613                              sizeof(struct MPI2_IOC_INIT_REQUEST),
 614                              &ioc_init_handle, GFP_KERNEL);
 615
 616         if (!IOCInitMessage) {
 617                 printk(KERN_ERR "Could not allocate memory for "
 618                        "IOCInitMessage\n");
 619                 ret = 1;
 620                 goto fail_fw_init;
 621         }
 622
 623         memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
 624
 625         IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
 626         IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
 627         IOCInitMessage->MsgVersion = MPI2_VERSION;
 628         IOCInitMessage->HeaderVersion = MPI2_HEADER_VERSION;
 629         IOCInitMessage->SystemRequestFrameSize =
 630                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4;
 631
 632         IOCInitMessage->ReplyDescriptorPostQueueDepth = fusion->reply_q_depth;
 633         IOCInitMessage->ReplyDescriptorPostQueueAddress =
 634                 fusion->reply_frames_desc_phys;
 635         IOCInitMessage->SystemRequestFrameBaseAddress =
 636                 fusion->io_request_frames_phys;
 637         /* Set to 0 for none or 1 MSI-X vectors */
 638         IOCInitMessage->HostMSIxVectors = (instance->msix_vectors > 0 ?
 639                                            instance->msix_vectors : 0);
 640         init_frame = (struct megasas_init_frame *)cmd->frame;
 641         memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
 642
 643         frame_hdr = &cmd->frame->hdr;
 644         frame_hdr->cmd_status = 0xFF;
 645         frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
 646
 647         init_frame->cmd = MFI_CMD_INIT;
 648         init_frame->cmd_status = 0xFF;
 649
 650         init_frame->queue_info_new_phys_addr_lo = ioc_init_handle;
 651         init_frame->data_xfer_len = sizeof(struct MPI2_IOC_INIT_REQUEST);
 652
 653         req_desc =
 654           (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)fusion->req_frames_desc;
 655
 656         req_desc->Words = cmd->frame_phys_addr;
 657         req_desc->MFAIo.RequestFlags =
 658                 (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
 659                  MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 660
 661         /*
 662          * disable the intr before firing the init frame
 663          */
 664         instance->instancet->disable_intr(instance->reg_set);
 665
 666         for (i = 0; i < (10 * 1000); i += 20) {
 667                 if (readl(&instance->reg_set->doorbell) & 1)
 668                         msleep(20);
 669                 else
 670                         break;
 671         }
 672
 673         instance->instancet->fire_cmd(instance, req_desc->u.low,
 674                                       req_desc->u.high, instance->reg_set);
 675
 676         wait_and_poll(instance, cmd);
 677
 678         frame_hdr = &cmd->frame->hdr;
 679         if (frame_hdr->cmd_status != 0) {
 680                 ret = 1;
 681                 goto fail_fw_init;
 682         }
 683         printk(KERN_ERR "megasas:IOC Init cmd success\n");
 684
 685         ret = 0;
 686
 687 fail_fw_init:
 688         megasas_return_cmd(instance, cmd);
 689         if (IOCInitMessage)
 690                 dma_free_coherent(&instance->pdev->dev,
 691                                   sizeof(struct MPI2_IOC_INIT_REQUEST),
 692                                   IOCInitMessage, ioc_init_handle);
 693 fail_get_cmd:
 694         return ret;
 695 }
 696
 697 /*
 698  * megasas_get_ld_map_info -    Returns FW's ld_map structure
 699  * @instance:                           Adapter soft state
 700  * @pend:                               Pend the command or not
 701  * Issues an internal command (DCMD) to get the FW's controller PD
 702  * list structure.  This information is mainly used to find out SYSTEM
 703  * supported by the FW.
 704  */
 705 static int
 706 megasas_get_ld_map_info(struct megasas_instance *instance)
 707 {
 708         int ret = 0;
 709         struct megasas_cmd *cmd;
 710         struct megasas_dcmd_frame *dcmd;
 711         struct MR_FW_RAID_MAP_ALL *ci;
 712         dma_addr_t ci_h = 0;
 713         u32 size_map_info;
 714         struct fusion_context *fusion;
 715
 716         cmd = megasas_get_cmd(instance);
 717
 718         if (!cmd) {
 719                 printk(KERN_DEBUG "megasas: Failed to get cmd for map info.\n");
 720                 return -ENOMEM;
 721         }
 722
 723         fusion = instance->ctrl_context;
 724
 725         if (!fusion) {
 726                 megasas_return_cmd(instance, cmd);
 727                 return 1;
 728         }
 729
 730         dcmd = &cmd->frame->dcmd;
 731
 732         size_map_info = sizeof(struct MR_FW_RAID_MAP) +
 733                 (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 734
 735         ci = fusion->ld_map[(instance->map_id & 1)];
 736         ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
 737
 738         if (!ci) {
 739                 printk(KERN_DEBUG "Failed to alloc mem for ld_map_info\n");
 740                 megasas_return_cmd(instance, cmd);
 741                 return -ENOMEM;
 742         }
 743
 744         memset(ci, 0, sizeof(*ci));
 745         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 746
 747         dcmd->cmd = MFI_CMD_DCMD;
 748         dcmd->cmd_status = 0xFF;
 749         dcmd->sge_count = 1;
 750         dcmd->flags = MFI_FRAME_DIR_READ;
 751         dcmd->timeout = 0;
 752         dcmd->pad_0 = 0;
 753         dcmd->data_xfer_len = size_map_info;
 754         dcmd->opcode = MR_DCMD_LD_MAP_GET_INFO;
 755         dcmd->sgl.sge32[0].phys_addr = ci_h;
 756         dcmd->sgl.sge32[0].length = size_map_info;
 757
 758         if (!megasas_issue_polled(instance, cmd))
 759                 ret = 0;
 760         else {
 761                 printk(KERN_ERR "megasas: Get LD Map Info Failed\n");
 762                 ret = -1;
 763         }
 764
 765         megasas_return_cmd(instance, cmd);
 766
 767         return ret;
 768 }
 769
 770 u8
 771 megasas_get_map_info(struct megasas_instance *instance)
 772 {
 773         struct fusion_context *fusion = instance->ctrl_context;
 774
 775         fusion->fast_path_io = 0;
 776         if (!megasas_get_ld_map_info(instance)) {
 777                 if (MR_ValidateMapInfo(fusion->ld_map[(instance->map_id & 1)],
 778                                        fusion->load_balance_info)) {
 779                         fusion->fast_path_io = 1;
 780                         return 0;
 781                 }
 782         }
 783         return 1;
 784 }
 785
 786 /*
 787  * megasas_sync_map_info -      Returns FW's ld_map structure
 788  * @instance:                           Adapter soft state
 789  *
 790  * Issues an internal command (DCMD) to get the FW's controller PD
 791  * list structure.  This information is mainly used to find out SYSTEM
 792  * supported by the FW.
 793  */
 794 int
 795 megasas_sync_map_info(struct megasas_instance *instance)
 796 {
 797         int ret = 0, i;
 798         struct megasas_cmd *cmd;
 799         struct megasas_dcmd_frame *dcmd;
 800         u32 size_sync_info, num_lds;
 801         struct fusion_context *fusion;
 802         struct MR_LD_TARGET_SYNC *ci = NULL;
 803         struct MR_FW_RAID_MAP_ALL *map;
 804         struct MR_LD_RAID  *raid;
 805         struct MR_LD_TARGET_SYNC *ld_sync;
 806         dma_addr_t ci_h = 0;
 807         u32 size_map_info;
 808
 809         cmd = megasas_get_cmd(instance);
 810
 811         if (!cmd) {
 812                 printk(KERN_DEBUG "megasas: Failed to get cmd for sync"
 813                        "info.\n");
 814                 return -ENOMEM;
 815         }
 816
 817         fusion = instance->ctrl_context;
 818
 819         if (!fusion) {
 820                 megasas_return_cmd(instance, cmd);
 821                 return 1;
 822         }
 823
 824         map = fusion->ld_map[instance->map_id & 1];
 825
 826         num_lds = map->raidMap.ldCount;
 827
 828         dcmd = &cmd->frame->dcmd;
 829
 830         size_sync_info = sizeof(struct MR_LD_TARGET_SYNC) *num_lds;
 831
 832         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 833
 834         ci = (struct MR_LD_TARGET_SYNC *)
 835           fusion->ld_map[(instance->map_id - 1) & 1];
 836         memset(ci, 0, sizeof(struct MR_FW_RAID_MAP_ALL));
 837
 838         ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
 839
 840         ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
 841
 842         for (i = 0; i < num_lds; i++, ld_sync++) {
 843                 raid = MR_LdRaidGet(i, map);
 844                 ld_sync->targetId = MR_GetLDTgtId(i, map);
 845                 ld_sync->seqNum = raid->seqNum;
 846         }
 847
 848         size_map_info = sizeof(struct MR_FW_RAID_MAP) +
 849                 (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 850
 851         dcmd->cmd = MFI_CMD_DCMD;
 852         dcmd->cmd_status = 0xFF;
 853         dcmd->sge_count = 1;
 854         dcmd->flags = MFI_FRAME_DIR_WRITE;
 855         dcmd->timeout = 0;
 856         dcmd->pad_0 = 0;
 857         dcmd->data_xfer_len = size_map_info;
 858         dcmd->mbox.b[0] = num_lds;
 859         dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
 860         dcmd->opcode = MR_DCMD_LD_MAP_GET_INFO;
 861         dcmd->sgl.sge32[0].phys_addr = ci_h;
 862         dcmd->sgl.sge32[0].length = size_map_info;
 863
 864         instance->map_update_cmd = cmd;
 865
 866         instance->instancet->issue_dcmd(instance, cmd);
 867
 868         return ret;
 869 }
 870
 871 /**
 872  * megasas_init_adapter_fusion -        Initializes the FW
 873  * @instance:           Adapter soft state
 874  *
 875  * This is the main function for initializing firmware.
 876  */
 877 u32
 878 megasas_init_adapter_fusion(struct megasas_instance *instance)
 879 {
 880         struct megasas_register_set __iomem *reg_set;
 881         struct fusion_context *fusion;
 882         u32 max_cmd;
 883         int i = 0, count;
 884
 885         fusion = instance->ctrl_context;
 886
 887         reg_set = instance->reg_set;
 888
 889         /*
 890          * Get various operational parameters from status register
 891          */
 892         instance->max_fw_cmds =
 893                 instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
 894         instance->max_fw_cmds = min(instance->max_fw_cmds, (u16)1008);
 895
 896         /*
 897          * Reduce the max supported cmds by 1. This is to ensure that the
 898          * reply_q_sz (1 more than the max cmd that driver may send)
 899          * does not exceed max cmds that the FW can support
 900          */
 901         instance->max_fw_cmds = instance->max_fw_cmds-1;
 902         /* Only internal cmds (DCMD) need to have MFI frames */
 903         instance->max_mfi_cmds = MEGASAS_INT_CMDS;
 904
 905         max_cmd = instance->max_fw_cmds;
 906
 907         fusion->reply_q_depth = ((max_cmd + 1 + 15)/16)*16;
 908
 909         fusion->request_alloc_sz =
 910                 sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *max_cmd;
 911         fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)
 912                 *(fusion->reply_q_depth);
 913         fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
 914                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE *
 915                  (max_cmd + 1)); /* Extra 1 for SMID 0 */
 916
 917         fusion->max_sge_in_main_msg =
 918           (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
 919            offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
 920
 921         fusion->max_sge_in_chain =
 922                 MEGASAS_MAX_SZ_CHAIN_FRAME / sizeof(union MPI2_SGE_IO_UNION);
 923
 924         instance->max_num_sge = fusion->max_sge_in_main_msg +
 925                 fusion->max_sge_in_chain - 2;
 926
 927         /* Used for pass thru MFI frame (DCMD) */
 928         fusion->chain_offset_mfi_pthru =
 929                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
 930
 931         fusion->chain_offset_io_request =
 932                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
 933                  sizeof(union MPI2_SGE_IO_UNION))/16;
 934
 935         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 936         for (i = 0 ; i < count; i++)
 937                 fusion->last_reply_idx[i] = 0;
 938
 939         /*
 940          * Allocate memory for descriptors
 941          * Create a pool of commands
 942          */
 943         if (megasas_alloc_cmds(instance))
 944                 goto fail_alloc_mfi_cmds;
 945         if (megasas_alloc_cmds_fusion(instance))
 946                 goto fail_alloc_cmds;
 947
 948         if (megasas_ioc_init_fusion(instance))
 949                 goto fail_ioc_init;
 950
 951         instance->flag_ieee = 1;
 952
 953         fusion->map_sz =  sizeof(struct MR_FW_RAID_MAP) +
 954           (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 955
 956         fusion->fast_path_io = 0;
 957
 958         for (i = 0; i < 2; i++) {
 959                 fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
 960                                                        fusion->map_sz,
 961                                                        &fusion->ld_map_phys[i],
 962                                                        GFP_KERNEL);
 963                 if (!fusion->ld_map[i]) {
 964                         printk(KERN_ERR "megasas: Could not allocate memory "
 965                                "for map info\n");
 966                         goto fail_map_info;
 967                 }
 968         }
 969
 970         if (!megasas_get_map_info(instance))
 971                 megasas_sync_map_info(instance);
 972
 973         return 0;
 974
 975 fail_map_info:
 976         if (i == 1)
 977                 dma_free_coherent(&instance->pdev->dev, fusion->map_sz,
 978                                   fusion->ld_map[0], fusion->ld_map_phys[0]);
 979 fail_ioc_init:
 980         megasas_free_cmds_fusion(instance);
 981 fail_alloc_cmds:
 982         megasas_free_cmds(instance);
 983 fail_alloc_mfi_cmds:
 984         return 1;
 985 }
 986
 987 /**
 988  * megasas_fire_cmd_fusion -    Sends command to the FW
 989  * @frame_phys_addr :           Physical address of cmd
 990  * @frame_count :               Number of frames for the command
 991  * @regs :                      MFI register set
 992  */
 993 void
 994 megasas_fire_cmd_fusion(struct megasas_instance *instance,
 995                         dma_addr_t req_desc_lo,
 996                         u32 req_desc_hi,
 997                         struct megasas_register_set __iomem *regs)
 998 {
 999         unsigned long flags;
1000
1001         spin_lock_irqsave(&instance->hba_lock, flags);
1002
1003         writel(req_desc_lo,
1004                &(regs)->inbound_low_queue_port);
1005         writel(req_desc_hi, &(regs)->inbound_high_queue_port);
1006         spin_unlock_irqrestore(&instance->hba_lock, flags);
1007 }
1008
1009 /**
1010  * map_cmd_status -     Maps FW cmd status to OS cmd status
1011  * @cmd :               Pointer to cmd
1012  * @status :            status of cmd returned by FW
1013  * @ext_status :        ext status of cmd returned by FW
1014  */
1015
1016 void
1017 map_cmd_status(struct megasas_cmd_fusion *cmd, u8 status, u8 ext_status)
1018 {
1019
1020         switch (status) {
1021
1022         case MFI_STAT_OK:
1023                 cmd->scmd->result = DID_OK << 16;
1024                 break;
1025
1026         case MFI_STAT_SCSI_IO_FAILED:
1027         case MFI_STAT_LD_INIT_IN_PROGRESS:
1028                 cmd->scmd->result = (DID_ERROR << 16) | ext_status;
1029                 break;
1030
1031         case MFI_STAT_SCSI_DONE_WITH_ERROR:
1032
1033                 cmd->scmd->result = (DID_OK << 16) | ext_status;
1034                 if (ext_status == SAM_STAT_CHECK_CONDITION) {
1035                         memset(cmd->scmd->sense_buffer, 0,
1036                                SCSI_SENSE_BUFFERSIZE);
1037                         memcpy(cmd->scmd->sense_buffer, cmd->sense,
1038                                SCSI_SENSE_BUFFERSIZE);
1039                         cmd->scmd->result |= DRIVER_SENSE << 24;
1040                 }
1041                 break;
1042
1043         case MFI_STAT_LD_OFFLINE:
1044         case MFI_STAT_DEVICE_NOT_FOUND:
1045                 cmd->scmd->result = DID_BAD_TARGET << 16;
1046                 break;
1047         case MFI_STAT_CONFIG_SEQ_MISMATCH:
1048                 cmd->scmd->result = DID_IMM_RETRY << 16;
1049                 break;
1050         default:
1051                 printk(KERN_DEBUG "megasas: FW status %#x\n", status);
1052                 cmd->scmd->result = DID_ERROR << 16;
1053                 break;
1054         }
1055 }
1056
1057 /**
1058  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
1059  * @instance:           Adapter soft state
1060  * @scp:                SCSI command from the mid-layer
1061  * @sgl_ptr:            SGL to be filled in
1062  * @cmd:                cmd we are working on
1063  *
1064  * If successful, this function returns the number of SG elements.
1065  */
1066 static int
1067 megasas_make_sgl_fusion(struct megasas_instance *instance,
1068                         struct scsi_cmnd *scp,
1069                         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
1070                         struct megasas_cmd_fusion *cmd)
1071 {
1072         int i, sg_processed, sge_count;
1073         struct scatterlist *os_sgl;
1074         struct fusion_context *fusion;
1075
1076         fusion = instance->ctrl_context;
1077
1078         if (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) {
1079                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
1080                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
1081                 sgl_ptr_end->Flags = 0;
1082         }
1083
1084         sge_count = scsi_dma_map(scp);
1085
1086         BUG_ON(sge_count < 0);
1087
1088         if (sge_count > instance->max_num_sge || !sge_count)
1089                 return sge_count;
1090
1091         scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1092                 sgl_ptr->Length = sg_dma_len(os_sgl);
1093                 sgl_ptr->Address = sg_dma_address(os_sgl);
1094                 sgl_ptr->Flags = 0;
1095                 if (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) {
1096                         if (i == sge_count - 1)
1097                                 sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
1098                 }
1099                 sgl_ptr++;
1100
1101                 sg_processed = i + 1;
1102
1103                 if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
1104                     (sge_count > fusion->max_sge_in_main_msg)) {
1105
1106                         struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
1107                         if (instance->pdev->device ==
1108                             PCI_DEVICE_ID_LSI_INVADER) {
1109                                 if ((cmd->io_request->IoFlags &
1110                                 MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
1111                                 MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
1112                                         cmd->io_request->ChainOffset =
1113                                                 fusion->
1114                                                 chain_offset_io_request;
1115                                 else
1116                                         cmd->io_request->ChainOffset = 0;
1117                         } else
1118                                 cmd->io_request->ChainOffset =
1119                                         fusion->chain_offset_io_request;
1120
1121                         sg_chain = sgl_ptr;
1122                         /* Prepare chain element */
1123                         sg_chain->NextChainOffset = 0;
1124                         if (instance->pdev->device ==
1125                             PCI_DEVICE_ID_LSI_INVADER)
1126                                 sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
1127                         else
1128                                 sg_chain->Flags =
1129                                         (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
1130                                          MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
1131                         sg_chain->Length =  (sizeof(union MPI2_SGE_IO_UNION)
1132                                              *(sge_count - sg_processed));
1133                         sg_chain->Address = cmd->sg_frame_phys_addr;
1134
1135                         sgl_ptr =
1136                           (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
1137                 }
1138         }
1139
1140         return sge_count;
1141 }
1142
1143 /**
1144  * megasas_set_pd_lba - Sets PD LBA
1145  * @cdb:                CDB
1146  * @cdb_len:            cdb length
1147  * @start_blk:          Start block of IO
1148  *
1149  * Used to set the PD LBA in CDB for FP IOs
1150  */
1151 void
1152 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
1153                    struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
1154                    struct MR_FW_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
1155 {
1156         struct MR_LD_RAID *raid;
1157         u32 ld;
1158         u64 start_blk = io_info->pdBlock;
1159         u8 *cdb = io_request->CDB.CDB32;
1160         u32 num_blocks = io_info->numBlocks;
1161         u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
1162
1163         /* Check if T10 PI (DIF) is enabled for this LD */
1164         ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
1165         raid = MR_LdRaidGet(ld, local_map_ptr);
1166         if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
1167                 memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1168                 cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
1169                 cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
1170
1171                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1172                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
1173                 else
1174                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
1175                 cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
1176
1177                 /* LBA */
1178                 cdb[12] = (u8)((start_blk >> 56) & 0xff);
1179                 cdb[13] = (u8)((start_blk >> 48) & 0xff);
1180                 cdb[14] = (u8)((start_blk >> 40) & 0xff);
1181                 cdb[15] = (u8)((start_blk >> 32) & 0xff);
1182                 cdb[16] = (u8)((start_blk >> 24) & 0xff);
1183                 cdb[17] = (u8)((start_blk >> 16) & 0xff);
1184                 cdb[18] = (u8)((start_blk >> 8) & 0xff);
1185                 cdb[19] = (u8)(start_blk & 0xff);
1186
1187                 /* Logical block reference tag */
1188                 io_request->CDB.EEDP32.PrimaryReferenceTag =
1189                         cpu_to_be32(ref_tag);
1190                 io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0xffff;
1191
1192                 io_request->DataLength = num_blocks * 512;
1193                 io_request->IoFlags = 32; /* Specify 32-byte cdb */
1194
1195                 /* Transfer length */
1196                 cdb[28] = (u8)((num_blocks >> 24) & 0xff);
1197                 cdb[29] = (u8)((num_blocks >> 16) & 0xff);
1198                 cdb[30] = (u8)((num_blocks >> 8) & 0xff);
1199                 cdb[31] = (u8)(num_blocks & 0xff);
1200
1201                 /* set SCSI IO EEDPFlags */
1202                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) {
1203                         io_request->EEDPFlags =
1204                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
1205                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
1206                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
1207                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
1208                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD;
1209                 } else {
1210                         io_request->EEDPFlags =
1211                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
1212                                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP;
1213                 }
1214                 io_request->Control |= (0x4 << 26);
1215                 io_request->EEDPBlockSize = MEGASAS_EEDPBLOCKSIZE;
1216         } else {
1217                 /* Some drives don't support 16/12 byte CDB's, convert to 10 */
1218                 if (((cdb_len == 12) || (cdb_len == 16)) &&
1219                     (start_blk <= 0xffffffff)) {
1220                         if (cdb_len == 16) {
1221                                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
1222                                 flagvals = cdb[1];
1223                                 groupnum = cdb[14];
1224                                 control = cdb[15];
1225                         } else {
1226                                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
1227                                 flagvals = cdb[1];
1228                                 groupnum = cdb[10];
1229                                 control = cdb[11];
1230                         }
1231
1232                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1233
1234                         cdb[0] = opcode;
1235                         cdb[1] = flagvals;
1236                         cdb[6] = groupnum;
1237                         cdb[9] = control;
1238
1239                         /* Transfer length */
1240                         cdb[8] = (u8)(num_blocks & 0xff);
1241                         cdb[7] = (u8)((num_blocks >> 8) & 0xff);
1242
1243                         io_request->IoFlags = 10; /* Specify 10-byte cdb */
1244                         cdb_len = 10;
1245                 } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
1246                         /* Convert to 16 byte CDB for large LBA's */
1247                         switch (cdb_len) {
1248                         case 6:
1249                                 opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
1250                                 control = cdb[5];
1251                                 break;
1252                         case 10:
1253                                 opcode =
1254                                         cdb[0] == READ_10 ? READ_16 : WRITE_16;
1255                                 flagvals = cdb[1];
1256                                 groupnum = cdb[6];
1257                                 control = cdb[9];
1258                                 break;
1259                         case 12:
1260                                 opcode =
1261                                         cdb[0] == READ_12 ? READ_16 : WRITE_16;
1262                                 flagvals = cdb[1];
1263                                 groupnum = cdb[10];
1264                                 control = cdb[11];
1265                                 break;
1266                         }
1267
1268                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1269
1270                         cdb[0] = opcode;
1271                         cdb[1] = flagvals;
1272                         cdb[14] = groupnum;
1273                         cdb[15] = control;
1274
1275                         /* Transfer length */
1276                         cdb[13] = (u8)(num_blocks & 0xff);
1277                         cdb[12] = (u8)((num_blocks >> 8) & 0xff);
1278                         cdb[11] = (u8)((num_blocks >> 16) & 0xff);
1279                         cdb[10] = (u8)((num_blocks >> 24) & 0xff);
1280
1281                         io_request->IoFlags = 16; /* Specify 16-byte cdb */
1282                         cdb_len = 16;
1283                 }
1284
1285                 /* Normal case, just load LBA here */
1286                 switch (cdb_len) {
1287                 case 6:
1288                 {
1289                         u8 val = cdb[1] & 0xE0;
1290                         cdb[3] = (u8)(start_blk & 0xff);
1291                         cdb[2] = (u8)((start_blk >> 8) & 0xff);
1292                         cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
1293                         break;
1294                 }
1295                 case 10:
1296                         cdb[5] = (u8)(start_blk & 0xff);
1297                         cdb[4] = (u8)((start_blk >> 8) & 0xff);
1298                         cdb[3] = (u8)((start_blk >> 16) & 0xff);
1299                         cdb[2] = (u8)((start_blk >> 24) & 0xff);
1300                         break;
1301                 case 12:
1302                         cdb[5]    = (u8)(start_blk & 0xff);
1303                         cdb[4]    = (u8)((start_blk >> 8) & 0xff);
1304                         cdb[3]    = (u8)((start_blk >> 16) & 0xff);
1305                         cdb[2]    = (u8)((start_blk >> 24) & 0xff);
1306                         break;
1307                 case 16:
1308                         cdb[9]    = (u8)(start_blk & 0xff);
1309                         cdb[8]    = (u8)((start_blk >> 8) & 0xff);
1310                         cdb[7]    = (u8)((start_blk >> 16) & 0xff);
1311                         cdb[6]    = (u8)((start_blk >> 24) & 0xff);
1312                         cdb[5]    = (u8)((start_blk >> 32) & 0xff);
1313                         cdb[4]    = (u8)((start_blk >> 40) & 0xff);
1314                         cdb[3]    = (u8)((start_blk >> 48) & 0xff);
1315                         cdb[2]    = (u8)((start_blk >> 56) & 0xff);
1316                         break;
1317                 }
1318         }
1319 }
1320
1321 /**
1322  * megasas_build_ldio_fusion -  Prepares IOs to devices
1323  * @instance:           Adapter soft state
1324  * @scp:                SCSI command
1325  * @cmd:                Command to be prepared
1326  *
1327  * Prepares the io_request and chain elements (sg_frame) for IO
1328  * The IO can be for PD (Fast Path) or LD
1329  */
1330 void
1331 megasas_build_ldio_fusion(struct megasas_instance *instance,
1332                           struct scsi_cmnd *scp,
1333                           struct megasas_cmd_fusion *cmd)
1334 {
1335         u8 fp_possible;
1336         u32 start_lba_lo, start_lba_hi, device_id;
1337         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1338         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1339         struct IO_REQUEST_INFO io_info;
1340         struct fusion_context *fusion;
1341         struct MR_FW_RAID_MAP_ALL *local_map_ptr;
1342
1343         device_id = MEGASAS_DEV_INDEX(instance, scp);
1344
1345         fusion = instance->ctrl_context;
1346
1347         io_request = cmd->io_request;
1348         io_request->RaidContext.VirtualDiskTgtId = device_id;
1349         io_request->RaidContext.status = 0;
1350         io_request->RaidContext.exStatus = 0;
1351
1352         req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc;
1353
1354         start_lba_lo = 0;
1355         start_lba_hi = 0;
1356         fp_possible = 0;
1357
1358         /*
1359          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1360          */
1361         if (scp->cmd_len == 6) {
1362                 io_request->DataLength = (u32) scp->cmnd[4];
1363                 start_lba_lo = ((u32) scp->cmnd[1] << 16) |
1364                         ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
1365
1366                 start_lba_lo &= 0x1FFFFF;
1367         }
1368
1369         /*
1370          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1371          */
1372         else if (scp->cmd_len == 10) {
1373                 io_request->DataLength = (u32) scp->cmnd[8] |
1374                         ((u32) scp->cmnd[7] << 8);
1375                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1376                         ((u32) scp->cmnd[3] << 16) |
1377                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1378         }
1379
1380         /*
1381          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1382          */
1383         else if (scp->cmd_len == 12) {
1384                 io_request->DataLength = ((u32) scp->cmnd[6] << 24) |
1385                         ((u32) scp->cmnd[7] << 16) |
1386                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1387                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1388                         ((u32) scp->cmnd[3] << 16) |
1389                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1390         }
1391
1392         /*
1393          * 16-byte READ(0x88) or WRITE(0x8A) cdb
1394          */
1395         else if (scp->cmd_len == 16) {
1396                 io_request->DataLength = ((u32) scp->cmnd[10] << 24) |
1397                         ((u32) scp->cmnd[11] << 16) |
1398                         ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
1399                 start_lba_lo = ((u32) scp->cmnd[6] << 24) |
1400                         ((u32) scp->cmnd[7] << 16) |
1401                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1402
1403                 start_lba_hi = ((u32) scp->cmnd[2] << 24) |
1404                         ((u32) scp->cmnd[3] << 16) |
1405                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1406         }
1407
1408         memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
1409         io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
1410         io_info.numBlocks = io_request->DataLength;
1411         io_info.ldTgtId = device_id;
1412
1413         if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1414                 io_info.isRead = 1;
1415
1416         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
1417
1418         if ((MR_TargetIdToLdGet(device_id, local_map_ptr) >=
1419              MAX_LOGICAL_DRIVES) || (!fusion->fast_path_io)) {
1420                 io_request->RaidContext.regLockFlags  = 0;
1421                 fp_possible = 0;
1422         } else {
1423                 if (MR_BuildRaidContext(instance, &io_info,
1424                                         &io_request->RaidContext,
1425                                         local_map_ptr))
1426                         fp_possible = io_info.fpOkForIo;
1427         }
1428
1429         /* Use smp_processor_id() for now until cmd->request->cpu is CPU
1430            id by default, not CPU group id, otherwise all MSI-X queues won't
1431            be utilized */
1432         cmd->request_desc->SCSIIO.MSIxIndex = instance->msix_vectors ?
1433                 smp_processor_id() % instance->msix_vectors : 0;
1434
1435         if (fp_possible) {
1436                 megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
1437                                    local_map_ptr, start_lba_lo);
1438                 io_request->DataLength = scsi_bufflen(scp);
1439                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
1440                 cmd->request_desc->SCSIIO.RequestFlags =
1441                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY
1442                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1443                 if (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) {
1444                         if (io_request->RaidContext.regLockFlags ==
1445                             REGION_TYPE_UNUSED)
1446                                 cmd->request_desc->SCSIIO.RequestFlags =
1447                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
1448                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1449                         io_request->RaidContext.Type = MPI2_TYPE_CUDA;
1450                         io_request->RaidContext.nseg = 0x1;
1451                         io_request->IoFlags |=
1452                           MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH;
1453                         io_request->RaidContext.regLockFlags |=
1454                           (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
1455                            MR_RL_FLAGS_SEQ_NUM_ENABLE);
1456                 }
1457                 if ((fusion->load_balance_info[device_id].loadBalanceFlag) &&
1458                     (io_info.isRead)) {
1459                         io_info.devHandle =
1460                                 get_updated_dev_handle(
1461                                         &fusion->load_balance_info[device_id],
1462                                         &io_info);
1463                         scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
1464                 } else
1465                         scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
1466                 cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
1467                 io_request->DevHandle = io_info.devHandle;
1468         } else {
1469                 io_request->RaidContext.timeoutValue =
1470                         local_map_ptr->raidMap.fpPdIoTimeoutSec;
1471                 cmd->request_desc->SCSIIO.RequestFlags =
1472                         (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
1473                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1474                 if (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) {
1475                         if (io_request->RaidContext.regLockFlags ==
1476                             REGION_TYPE_UNUSED)
1477                                 cmd->request_desc->SCSIIO.RequestFlags =
1478                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
1479                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1480                         io_request->RaidContext.Type = MPI2_TYPE_CUDA;
1481                         io_request->RaidContext.regLockFlags |=
1482                                 (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
1483                                  MR_RL_FLAGS_SEQ_NUM_ENABLE);
1484                         io_request->RaidContext.nseg = 0x1;
1485                 }
1486                 io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1487                 io_request->DevHandle = device_id;
1488         } /* Not FP */
1489 }
1490
1491 /**
1492  * megasas_build_dcdb_fusion -  Prepares IOs to devices
1493  * @instance:           Adapter soft state
1494  * @scp:                SCSI command
1495  * @cmd:                Command to be prepared
1496  *
1497  * Prepares the io_request frame for non-io cmds
1498  */
1499 static void
1500 megasas_build_dcdb_fusion(struct megasas_instance *instance,
1501                           struct scsi_cmnd *scmd,
1502                           struct megasas_cmd_fusion *cmd)
1503 {
1504         u32 device_id;
1505         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1506         u16 pd_index = 0;
1507         struct MR_FW_RAID_MAP_ALL *local_map_ptr;
1508         struct fusion_context *fusion = instance->ctrl_context;
1509
1510         io_request = cmd->io_request;
1511         device_id = MEGASAS_DEV_INDEX(instance, scmd);
1512         pd_index = (scmd->device->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
1513                 +scmd->device->id;
1514         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
1515
1516         /* Check if this is a system PD I/O */
1517         if (instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
1518                 io_request->Function = 0;
1519                 io_request->DevHandle =
1520                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
1521                 io_request->RaidContext.timeoutValue =
1522                         local_map_ptr->raidMap.fpPdIoTimeoutSec;
1523                 io_request->RaidContext.regLockFlags = 0;
1524                 io_request->RaidContext.regLockRowLBA = 0;
1525                 io_request->RaidContext.regLockLength = 0;
1526                 io_request->RaidContext.RAIDFlags =
1527                         MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD <<
1528                         MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
1529                 cmd->request_desc->SCSIIO.RequestFlags =
1530                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
1531                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1532         } else {
1533                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1534                 io_request->DevHandle = device_id;
1535                 cmd->request_desc->SCSIIO.RequestFlags =
1536                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
1537                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1538         }
1539         io_request->RaidContext.VirtualDiskTgtId = device_id;
1540         io_request->LUN[1] = scmd->device->lun;
1541         io_request->DataLength = scsi_bufflen(scmd);
1542 }
1543
1544 /**
1545  * megasas_build_io_fusion -    Prepares IOs to devices
1546  * @instance:           Adapter soft state
1547  * @scp:                SCSI command
1548  * @cmd:                Command to be prepared
1549  *
1550  * Invokes helper functions to prepare request frames
1551  * and sets flags appropriate for IO/Non-IO cmd
1552  */
1553 int
1554 megasas_build_io_fusion(struct megasas_instance *instance,
1555                         struct scsi_cmnd *scp,
1556                         struct megasas_cmd_fusion *cmd)
1557 {
1558         u32 device_id, sge_count;
1559         struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
1560
1561         device_id = MEGASAS_DEV_INDEX(instance, scp);
1562
1563         /* Zero out some fields so they don't get reused */
1564         io_request->LUN[1] = 0;
1565         io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
1566         io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
1567         io_request->EEDPFlags = 0;
1568         io_request->Control = 0;
1569         io_request->EEDPBlockSize = 0;
1570         io_request->ChainOffset = 0;
1571         io_request->RaidContext.RAIDFlags = 0;
1572         io_request->RaidContext.Type = 0;
1573         io_request->RaidContext.nseg = 0;
1574
1575         memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
1576         /*
1577          * Just the CDB length,rest of the Flags are zero
1578          * This will be modified for FP in build_ldio_fusion
1579          */
1580         io_request->IoFlags = scp->cmd_len;
1581
1582         if (megasas_is_ldio(scp))
1583                 megasas_build_ldio_fusion(instance, scp, cmd);
1584         else
1585                 megasas_build_dcdb_fusion(instance, scp, cmd);
1586
1587         /*
1588          * Construct SGL
1589          */
1590
1591         sge_count =
1592                 megasas_make_sgl_fusion(instance, scp,
1593                                         (struct MPI25_IEEE_SGE_CHAIN64 *)
1594                                         &io_request->SGL, cmd);
1595
1596         if (sge_count > instance->max_num_sge) {
1597                 printk(KERN_ERR "megasas: Error. sge_count (0x%x) exceeds "
1598                        "max (0x%x) allowed\n", sge_count,
1599                        instance->max_num_sge);
1600                 return 1;
1601         }
1602
1603         io_request->RaidContext.numSGE = sge_count;
1604
1605         io_request->SGLFlags = MPI2_SGE_FLAGS_64_BIT_ADDRESSING;
1606
1607         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1608                 io_request->Control |= MPI2_SCSIIO_CONTROL_WRITE;
1609         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1610                 io_request->Control |= MPI2_SCSIIO_CONTROL_READ;
1611
1612         io_request->SGLOffset0 =
1613                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
1614
1615         io_request->SenseBufferLowAddress = cmd->sense_phys_addr;
1616         io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
1617
1618         cmd->scmd = scp;
1619         scp->SCp.ptr = (char *)cmd;
1620
1621         return 0;
1622 }
1623
1624 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
1625 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
1626 {
1627         u8 *p;
1628         struct fusion_context *fusion;
1629
1630         if (index >= instance->max_fw_cmds) {
1631                 printk(KERN_ERR "megasas: Invalid SMID (0x%x)request for "
1632                        "descriptor\n", index);
1633                 return NULL;
1634         }
1635         fusion = instance->ctrl_context;
1636         p = fusion->req_frames_desc
1637                 +sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *index;
1638
1639         return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
1640 }
1641
1642 /**
1643  * megasas_build_and_issue_cmd_fusion -Main routine for building and
1644  *                                     issuing non IOCTL cmd
1645  * @instance:                   Adapter soft state
1646  * @scmd:                       pointer to scsi cmd from OS
1647  */
1648 static u32
1649 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
1650                                    struct scsi_cmnd *scmd)
1651 {
1652         struct megasas_cmd_fusion *cmd;
1653         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1654         u32 index;
1655         struct fusion_context *fusion;
1656
1657         fusion = instance->ctrl_context;
1658
1659         cmd = megasas_get_cmd_fusion(instance);
1660         if (!cmd)
1661                 return SCSI_MLQUEUE_HOST_BUSY;
1662
1663         index = cmd->index;
1664
1665         req_desc = megasas_get_request_descriptor(instance, index-1);
1666         if (!req_desc)
1667                 return 1;
1668
1669         req_desc->Words = 0;
1670         cmd->request_desc = req_desc;
1671
1672         if (megasas_build_io_fusion(instance, scmd, cmd)) {
1673                 megasas_return_cmd_fusion(instance, cmd);
1674                 printk(KERN_ERR "megasas: Error building command.\n");
1675                 cmd->request_desc = NULL;
1676                 return 1;
1677         }
1678
1679         req_desc = cmd->request_desc;
1680         req_desc->SCSIIO.SMID = index;
1681
1682         if (cmd->io_request->ChainOffset != 0 &&
1683             cmd->io_request->ChainOffset != 0xF)
1684                 printk(KERN_ERR "megasas: The chain offset value is not "
1685                        "correct : %x\n", cmd->io_request->ChainOffset);
1686
1687         /*
1688          * Issue the command to the FW
1689          */
1690         atomic_inc(&instance->fw_outstanding);
1691
1692         instance->instancet->fire_cmd(instance,
1693                                       req_desc->u.low, req_desc->u.high,
1694                                       instance->reg_set);
1695
1696         return 0;
1697 }
1698
1699 /**
1700  * complete_cmd_fusion -        Completes command
1701  * @instance:                   Adapter soft state
1702  * Completes all commands that is in reply descriptor queue
1703  */
1704 int
1705 complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
1706 {
1707         union MPI2_REPLY_DESCRIPTORS_UNION *desc;
1708         struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
1709         struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
1710         struct fusion_context *fusion;
1711         struct megasas_cmd *cmd_mfi;
1712         struct megasas_cmd_fusion *cmd_fusion;
1713         u16 smid, num_completed;
1714         u8 reply_descript_type, arm;
1715         u32 status, extStatus, device_id;
1716         union desc_value d_val;
1717         struct LD_LOAD_BALANCE_INFO *lbinfo;
1718
1719         fusion = instance->ctrl_context;
1720
1721         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
1722                 return IRQ_HANDLED;
1723
1724         desc = fusion->reply_frames_desc;
1725         desc += ((MSIxIndex * fusion->reply_alloc_sz)/
1726                  sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)) +
1727                 fusion->last_reply_idx[MSIxIndex];
1728
1729         reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1730
1731         d_val.word = desc->Words;
1732
1733         reply_descript_type = reply_desc->ReplyFlags &
1734                 MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1735
1736         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1737                 return IRQ_NONE;
1738
1739         d_val.word = desc->Words;
1740
1741         num_completed = 0;
1742
1743         while ((d_val.u.low != UINT_MAX) && (d_val.u.high != UINT_MAX)) {
1744                 smid = reply_desc->SMID;
1745
1746                 cmd_fusion = fusion->cmd_list[smid - 1];
1747
1748                 scsi_io_req =
1749                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
1750                   cmd_fusion->io_request;
1751
1752                 if (cmd_fusion->scmd)
1753                         cmd_fusion->scmd->SCp.ptr = NULL;
1754
1755                 status = scsi_io_req->RaidContext.status;
1756                 extStatus = scsi_io_req->RaidContext.exStatus;
1757
1758                 switch (scsi_io_req->Function) {
1759                 case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
1760                         /* Update load balancing info */
1761                         device_id = MEGASAS_DEV_INDEX(instance,
1762                                                       cmd_fusion->scmd);
1763                         lbinfo = &fusion->load_balance_info[device_id];
1764                         if (cmd_fusion->scmd->SCp.Status &
1765                             MEGASAS_LOAD_BALANCE_FLAG) {
1766                                 arm = lbinfo->raid1DevHandle[0] ==
1767                                         cmd_fusion->io_request->DevHandle ? 0 :
1768                                         1;
1769                                 atomic_dec(&lbinfo->scsi_pending_cmds[arm]);
1770                                 cmd_fusion->scmd->SCp.Status &=
1771                                         ~MEGASAS_LOAD_BALANCE_FLAG;
1772                         }
1773                         if (reply_descript_type ==
1774                             MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) {
1775                                 if (megasas_dbg_lvl == 5)
1776                                         printk(KERN_ERR "\nmegasas: FAST Path "
1777                                                "IO Success\n");
1778                         }
1779                         /* Fall thru and complete IO */
1780                 case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
1781                         /* Map the FW Cmd Status */
1782                         map_cmd_status(cmd_fusion, status, extStatus);
1783                         scsi_dma_unmap(cmd_fusion->scmd);
1784                         cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
1785                         scsi_io_req->RaidContext.status = 0;
1786                         scsi_io_req->RaidContext.exStatus = 0;
1787                         megasas_return_cmd_fusion(instance, cmd_fusion);
1788                         atomic_dec(&instance->fw_outstanding);
1789
1790                         break;
1791                 case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
1792                         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
1793                         megasas_complete_cmd(instance, cmd_mfi, DID_OK);
1794                         cmd_fusion->flags = 0;
1795                         megasas_return_cmd_fusion(instance, cmd_fusion);
1796
1797                         break;
1798                 }
1799
1800                 fusion->last_reply_idx[MSIxIndex]++;
1801                 if (fusion->last_reply_idx[MSIxIndex] >=
1802                     fusion->reply_q_depth)
1803                         fusion->last_reply_idx[MSIxIndex] = 0;
1804
1805                 desc->Words = ULLONG_MAX;
1806                 num_completed++;
1807
1808                 /* Get the next reply descriptor */
1809                 if (!fusion->last_reply_idx[MSIxIndex])
1810                         desc = fusion->reply_frames_desc +
1811                                 ((MSIxIndex * fusion->reply_alloc_sz)/
1812                                  sizeof(union MPI2_REPLY_DESCRIPTORS_UNION));
1813                 else
1814                         desc++;
1815
1816                 reply_desc =
1817                   (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1818
1819                 d_val.word = desc->Words;
1820
1821                 reply_descript_type = reply_desc->ReplyFlags &
1822                         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1823
1824                 if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1825                         break;
1826         }
1827
1828         if (!num_completed)
1829                 return IRQ_NONE;
1830
1831         wmb();
1832         writel((MSIxIndex << 24) | fusion->last_reply_idx[MSIxIndex],
1833                &instance->reg_set->reply_post_host_index);
1834         megasas_check_and_restore_queue_depth(instance);
1835         return IRQ_HANDLED;
1836 }
1837
1838 /**
1839  * megasas_complete_cmd_dpc_fusion -    Completes command
1840  * @instance:                   Adapter soft state
1841  *
1842  * Tasklet to complete cmds
1843  */
1844 void
1845 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
1846 {
1847         struct megasas_instance *instance =
1848                 (struct megasas_instance *)instance_addr;
1849         unsigned long flags;
1850         u32 count, MSIxIndex;
1851
1852         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
1853
1854         /* If we have already declared adapter dead, donot complete cmds */
1855         spin_lock_irqsave(&instance->hba_lock, flags);
1856         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
1857                 spin_unlock_irqrestore(&instance->hba_lock, flags);
1858                 return;
1859         }
1860         spin_unlock_irqrestore(&instance->hba_lock, flags);
1861
1862         spin_lock_irqsave(&instance->completion_lock, flags);
1863         for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
1864                 complete_cmd_fusion(instance, MSIxIndex);
1865         spin_unlock_irqrestore(&instance->completion_lock, flags);
1866 }
1867
1868 /**
1869  * megasas_isr_fusion - isr entry point
1870  */
1871 irqreturn_t megasas_isr_fusion(int irq, void *devp)
1872 {
1873         struct megasas_irq_context *irq_context = devp;
1874         struct megasas_instance *instance = irq_context->instance;
1875         u32 mfiStatus, fw_state;
1876
1877         if (!instance->msix_vectors) {
1878                 mfiStatus = instance->instancet->clear_intr(instance->reg_set);
1879                 if (!mfiStatus)
1880                         return IRQ_NONE;
1881         }
1882
1883         /* If we are resetting, bail */
1884         if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
1885                 instance->instancet->clear_intr(instance->reg_set);
1886                 return IRQ_HANDLED;
1887         }
1888
1889         if (!complete_cmd_fusion(instance, irq_context->MSIxIndex)) {
1890                 instance->instancet->clear_intr(instance->reg_set);
1891                 /* If we didn't complete any commands, check for FW fault */
1892                 fw_state = instance->instancet->read_fw_status_reg(
1893                         instance->reg_set) & MFI_STATE_MASK;
1894                 if (fw_state == MFI_STATE_FAULT)
1895                         schedule_work(&instance->work_init);
1896         }
1897
1898         return IRQ_HANDLED;
1899 }
1900
1901 /**
1902  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
1903  * @instance:                   Adapter soft state
1904  * mfi_cmd:                     megasas_cmd pointer
1905  *
1906  */
1907 u8
1908 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
1909                         struct megasas_cmd *mfi_cmd)
1910 {
1911         struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
1912         struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
1913         struct megasas_cmd_fusion *cmd;
1914         struct fusion_context *fusion;
1915         struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
1916
1917         cmd = megasas_get_cmd_fusion(instance);
1918         if (!cmd)
1919                 return 1;
1920
1921         /*  Save the smid. To be used for returning the cmd */
1922         mfi_cmd->context.smid = cmd->index;
1923
1924         cmd->sync_cmd_idx = mfi_cmd->index;
1925
1926         /*
1927          * For cmds where the flag is set, store the flag and check
1928          * on completion. For cmds with this flag, don't call
1929          * megasas_complete_cmd
1930          */
1931
1932         if (frame_hdr->flags & MFI_FRAME_DONT_POST_IN_REPLY_QUEUE)
1933                 cmd->flags = MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
1934
1935         fusion = instance->ctrl_context;
1936         io_req = cmd->io_request;
1937
1938         if (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) {
1939                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
1940                         (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
1941                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
1942                 sgl_ptr_end->Flags = 0;
1943         }
1944
1945         mpi25_ieee_chain =
1946           (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
1947
1948         io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
1949         io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
1950                                        SGL) / 4;
1951         io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
1952
1953         mpi25_ieee_chain->Address = mfi_cmd->frame_phys_addr;
1954
1955         mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
1956                 MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
1957
1958         mpi25_ieee_chain->Length = MEGASAS_MAX_SZ_CHAIN_FRAME;
1959
1960         return 0;
1961 }
1962
1963 /**
1964  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
1965  * @instance:                   Adapter soft state
1966  * @cmd:                        mfi cmd to build
1967  *
1968  */
1969 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
1970 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
1971 {
1972         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1973         u16 index;
1974
1975         if (build_mpt_mfi_pass_thru(instance, cmd)) {
1976                 printk(KERN_ERR "Couldn't build MFI pass thru cmd\n");
1977                 return NULL;
1978         }
1979
1980         index = cmd->context.smid;
1981
1982         req_desc = megasas_get_request_descriptor(instance, index - 1);
1983
1984         if (!req_desc)
1985                 return NULL;
1986
1987         req_desc->Words = 0;
1988         req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
1989                                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1990
1991         req_desc->SCSIIO.SMID = index;
1992
1993         return req_desc;
1994 }
1995
1996 /**
1997  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
1998  * @instance:                   Adapter soft state
1999  * @cmd:                        mfi cmd pointer
2000  *
2001  */
2002 void
2003 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
2004                           struct megasas_cmd *cmd)
2005 {
2006         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2007
2008         req_desc = build_mpt_cmd(instance, cmd);
2009         if (!req_desc) {
2010                 printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
2011                 return;
2012         }
2013         instance->instancet->fire_cmd(instance, req_desc->u.low,
2014                                       req_desc->u.high, instance->reg_set);
2015 }
2016
2017 /**
2018  * megasas_release_fusion -     Reverses the FW initialization
2019  * @intance:                    Adapter soft state
2020  */
2021 void
2022 megasas_release_fusion(struct megasas_instance *instance)
2023 {
2024         megasas_free_cmds(instance);
2025         megasas_free_cmds_fusion(instance);
2026
2027         iounmap(instance->reg_set);
2028
2029         pci_release_selected_regions(instance->pdev, instance->bar);
2030 }
2031
2032 /**
2033  * megasas_read_fw_status_reg_fusion - returns the current FW status value
2034  * @regs:                       MFI register set
2035  */
2036 static u32
2037 megasas_read_fw_status_reg_fusion(struct megasas_register_set __iomem *regs)
2038 {
2039         return readl(&(regs)->outbound_scratch_pad);
2040 }
2041
2042 /**
2043  * megasas_adp_reset_fusion -   For controller reset
2044  * @regs:                               MFI register set
2045  */
2046 static int
2047 megasas_adp_reset_fusion(struct megasas_instance *instance,
2048                          struct megasas_register_set __iomem *regs)
2049 {
2050         return 0;
2051 }
2052
2053 /**
2054  * megasas_check_reset_fusion - For controller reset check
2055  * @regs:                               MFI register set
2056  */
2057 static int
2058 megasas_check_reset_fusion(struct megasas_instance *instance,
2059                            struct megasas_register_set __iomem *regs)
2060 {
2061         return 0;
2062 }
2063
2064 /* This function waits for outstanding commands on fusion to complete */
2065 int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance)
2066 {
2067         int i, outstanding, retval = 0;
2068         u32 fw_state, wait_time = MEGASAS_RESET_WAIT_TIME;
2069
2070         for (i = 0; i < wait_time; i++) {
2071                 /* Check if firmware is in fault state */
2072                 fw_state = instance->instancet->read_fw_status_reg(
2073                         instance->reg_set) & MFI_STATE_MASK;
2074                 if (fw_state == MFI_STATE_FAULT) {
2075                         printk(KERN_WARNING "megasas: Found FW in FAULT state,"
2076                                " will reset adapter.\n");
2077                         retval = 1;
2078                         goto out;
2079                 }
2080
2081                 outstanding = atomic_read(&instance->fw_outstanding);
2082                 if (!outstanding)
2083                         goto out;
2084
2085                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
2086                         printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
2087                                "commands to complete\n", i, outstanding);
2088                         megasas_complete_cmd_dpc_fusion(
2089                                 (unsigned long)instance);
2090                 }
2091                 msleep(1000);
2092         }
2093
2094         if (atomic_read(&instance->fw_outstanding)) {
2095                 printk("megaraid_sas: pending commands remain after waiting, "
2096                        "will reset adapter.\n");
2097                 retval = 1;
2098         }
2099 out:
2100         return retval;
2101 }
2102
2103 void  megasas_reset_reply_desc(struct megasas_instance *instance)
2104 {
2105         int i, count;
2106         struct fusion_context *fusion;
2107         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
2108
2109         fusion = instance->ctrl_context;
2110         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
2111         for (i = 0 ; i < count ; i++)
2112                 fusion->last_reply_idx[i] = 0;
2113         reply_desc = fusion->reply_frames_desc;
2114         for (i = 0 ; i < fusion->reply_q_depth * count; i++, reply_desc++)
2115                 reply_desc->Words = ULLONG_MAX;
2116 }
2117
2118 /* Core fusion reset function */
2119 int megasas_reset_fusion(struct Scsi_Host *shost)
2120 {
2121         int retval = SUCCESS, i, j, retry = 0;
2122         struct megasas_instance *instance;
2123         struct megasas_cmd_fusion *cmd_fusion;
2124         struct fusion_context *fusion;
2125         struct megasas_cmd *cmd_mfi;
2126         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2127         u32 host_diag, abs_state, status_reg, reset_adapter;
2128
2129         instance = (struct megasas_instance *)shost->hostdata;
2130         fusion = instance->ctrl_context;
2131
2132         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2133                 printk(KERN_WARNING "megaraid_sas: Hardware critical error, "
2134                        "returning FAILED.\n");
2135                 return FAILED;
2136         }
2137
2138         mutex_lock(&instance->reset_mutex);
2139         set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2140         instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
2141         instance->instancet->disable_intr(instance->reg_set);
2142         msleep(1000);
2143
2144         /* First try waiting for commands to complete */
2145         if (megasas_wait_for_outstanding_fusion(instance)) {
2146                 printk(KERN_WARNING "megaraid_sas: resetting fusion "
2147                        "adapter.\n");
2148                 /* Now return commands back to the OS */
2149                 for (i = 0 ; i < instance->max_fw_cmds; i++) {
2150                         cmd_fusion = fusion->cmd_list[i];
2151                         if (cmd_fusion->scmd) {
2152                                 scsi_dma_unmap(cmd_fusion->scmd);
2153                                 cmd_fusion->scmd->result = (DID_RESET << 16);
2154                                 cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
2155                                 megasas_return_cmd_fusion(instance, cmd_fusion);
2156                                 atomic_dec(&instance->fw_outstanding);
2157                         }
2158                 }
2159
2160                 status_reg = instance->instancet->read_fw_status_reg(
2161                         instance->reg_set);
2162                 abs_state = status_reg & MFI_STATE_MASK;
2163                 reset_adapter = status_reg & MFI_RESET_ADAPTER;
2164                 if (instance->disableOnlineCtrlReset ||
2165                     (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
2166                         /* Reset not supported, kill adapter */
2167                         printk(KERN_WARNING "megaraid_sas: Reset not supported"
2168                                ", killing adapter.\n");
2169                         megaraid_sas_kill_hba(instance);
2170                         instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
2171                         retval = FAILED;
2172                         goto out;
2173                 }
2174
2175                 /* Now try to reset the chip */
2176                 for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
2177                         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE,
2178                                &instance->reg_set->fusion_seq_offset);
2179                         writel(MPI2_WRSEQ_1ST_KEY_VALUE,
2180                                &instance->reg_set->fusion_seq_offset);
2181                         writel(MPI2_WRSEQ_2ND_KEY_VALUE,
2182                                &instance->reg_set->fusion_seq_offset);
2183                         writel(MPI2_WRSEQ_3RD_KEY_VALUE,
2184                                &instance->reg_set->fusion_seq_offset);
2185                         writel(MPI2_WRSEQ_4TH_KEY_VALUE,
2186                                &instance->reg_set->fusion_seq_offset);
2187                         writel(MPI2_WRSEQ_5TH_KEY_VALUE,
2188                                &instance->reg_set->fusion_seq_offset);
2189                         writel(MPI2_WRSEQ_6TH_KEY_VALUE,
2190                                &instance->reg_set->fusion_seq_offset);
2191
2192                         /* Check that the diag write enable (DRWE) bit is on */
2193                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2194                         retry = 0;
2195                         while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
2196                                 msleep(100);
2197                                 host_diag =
2198                                 readl(&instance->reg_set->fusion_host_diag);
2199                                 if (retry++ == 100) {
2200                                         printk(KERN_WARNING "megaraid_sas: "
2201                                                "Host diag unlock failed!\n");
2202                                         break;
2203                                 }
2204                         }
2205                         if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
2206                                 continue;
2207
2208                         /* Send chip reset command */
2209                         writel(host_diag | HOST_DIAG_RESET_ADAPTER,
2210                                &instance->reg_set->fusion_host_diag);
2211                         msleep(3000);
2212
2213                         /* Make sure reset adapter bit is cleared */
2214                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2215                         retry = 0;
2216                         while (host_diag & HOST_DIAG_RESET_ADAPTER) {
2217                                 msleep(100);
2218                                 host_diag =
2219                                 readl(&instance->reg_set->fusion_host_diag);
2220                                 if (retry++ == 1000) {
2221                                         printk(KERN_WARNING "megaraid_sas: "
2222                                                "Diag reset adapter never "
2223                                                "cleared!\n");
2224                                         break;
2225                                 }
2226                         }
2227                         if (host_diag & HOST_DIAG_RESET_ADAPTER)
2228                                 continue;
2229
2230                         abs_state =
2231                                 instance->instancet->read_fw_status_reg(
2232                                         instance->reg_set) & MFI_STATE_MASK;
2233                         retry = 0;
2234
2235                         while ((abs_state <= MFI_STATE_FW_INIT) &&
2236                                (retry++ < 1000)) {
2237                                 msleep(100);
2238                                 abs_state =
2239                                 instance->instancet->read_fw_status_reg(
2240                                         instance->reg_set) & MFI_STATE_MASK;
2241                         }
2242                         if (abs_state <= MFI_STATE_FW_INIT) {
2243                                 printk(KERN_WARNING "megaraid_sas: firmware "
2244                                        "state < MFI_STATE_FW_INIT, state = "
2245                                        "0x%x\n", abs_state);
2246                                 continue;
2247                         }
2248
2249                         /* Wait for FW to become ready */
2250                         if (megasas_transition_to_ready(instance, 1)) {
2251                                 printk(KERN_WARNING "megaraid_sas: Failed to "
2252                                        "transition controller to ready.\n");
2253                                 continue;
2254                         }
2255
2256                         megasas_reset_reply_desc(instance);
2257                         if (megasas_ioc_init_fusion(instance)) {
2258                                 printk(KERN_WARNING "megaraid_sas: "
2259                                        "megasas_ioc_init_fusion() failed!\n");
2260                                 continue;
2261                         }
2262
2263                         clear_bit(MEGASAS_FUSION_IN_RESET,
2264                                   &instance->reset_flags);
2265                         instance->instancet->enable_intr(instance->reg_set);
2266                         instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2267
2268                         /* Re-fire management commands */
2269                         for (j = 0 ; j < instance->max_fw_cmds; j++) {
2270                                 cmd_fusion = fusion->cmd_list[j];
2271                                 if (cmd_fusion->sync_cmd_idx !=
2272                                     (u32)ULONG_MAX) {
2273                                         cmd_mfi =
2274                                         instance->
2275                                         cmd_list[cmd_fusion->sync_cmd_idx];
2276                                         if (cmd_mfi->frame->dcmd.opcode ==
2277                                             MR_DCMD_LD_MAP_GET_INFO) {
2278                                                 megasas_return_cmd(instance,
2279                                                                    cmd_mfi);
2280                                                 megasas_return_cmd_fusion(
2281                                                         instance, cmd_fusion);
2282                                         } else  {
2283                                                 req_desc =
2284                                                 megasas_get_request_descriptor(
2285                                                         instance,
2286                                                         cmd_mfi->context.smid
2287                                                         -1);
2288                                                 if (!req_desc)
2289                                                         printk(KERN_WARNING
2290                                                                "req_desc NULL"
2291                                                                "\n");
2292                                                 else {
2293                                                         instance->instancet->
2294                                                         fire_cmd(instance,
2295                                                                  req_desc->
2296                                                                  u.low,
2297                                                                  req_desc->
2298                                                                  u.high,
2299                                                                  instance->
2300                                                                  reg_set);
2301                                                 }
2302                                         }
2303                                 }
2304                         }
2305
2306                         /* Reset load balance info */
2307                         memset(fusion->load_balance_info, 0,
2308                                sizeof(struct LD_LOAD_BALANCE_INFO)
2309                                *MAX_LOGICAL_DRIVES);
2310
2311                         if (!megasas_get_map_info(instance))
2312                                 megasas_sync_map_info(instance);
2313
2314                         /* Adapter reset completed successfully */
2315                         printk(KERN_WARNING "megaraid_sas: Reset "
2316                                "successful.\n");
2317                         retval = SUCCESS;
2318                         goto out;
2319                 }
2320                 /* Reset failed, kill the adapter */
2321                 printk(KERN_WARNING "megaraid_sas: Reset failed, killing "
2322                        "adapter.\n");
2323                 megaraid_sas_kill_hba(instance);
2324                 retval = FAILED;
2325         } else {
2326                 clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2327                 instance->instancet->enable_intr(instance->reg_set);
2328                 instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2329         }
2330 out:
2331         clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2332         mutex_unlock(&instance->reset_mutex);
2333         return retval;
2334 }
2335
2336 /* Fusion OCR work queue */
2337 void megasas_fusion_ocr_wq(struct work_struct *work)
2338 {
2339         struct megasas_instance *instance =
2340                 container_of(work, struct megasas_instance, work_init);
2341
2342         megasas_reset_fusion(instance->host);
2343 }
2344
2345 struct megasas_instance_template megasas_instance_template_fusion = {
2346         .fire_cmd = megasas_fire_cmd_fusion,
2347         .enable_intr = megasas_enable_intr_fusion,
2348         .disable_intr = megasas_disable_intr_fusion,
2349         .clear_intr = megasas_clear_intr_fusion,
2350         .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
2351         .adp_reset = megasas_adp_reset_fusion,
2352         .check_reset = megasas_check_reset_fusion,
2353         .service_isr = megasas_isr_fusion,
2354         .tasklet = megasas_complete_cmd_dpc_fusion,
2355         .init_adapter = megasas_init_adapter_fusion,
2356         .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
2357         .issue_dcmd = megasas_issue_dcmd_fusion,
2358 };