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