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