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