Pileus Git - ~andy/linux/blob - drivers/scsi/megaraid/megaraid_sas_fusion.c

   1 /*
   2  *  Linux MegaRAID driver for SAS based RAID controllers
   3  *
   4  *  Copyright (c) 2009-2012  LSI Corporation.
   5  *
   6  *  This program is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU General Public License
   8  *  as published by the Free Software Foundation; either version 2
   9  *  of the License, or (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  *  FILE: megaraid_sas_fusion.c
  21  *
  22  *  Authors: LSI Corporation
  23  *           Sumant Patro
  24  *           Adam Radford <linuxraid@lsi.com>
  25  *
  26  *  Send feedback to: <megaraidlinux@lsi.com>
  27  *
  28  *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
  29  *     ATTN: Linuxraid
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/types.h>
  34 #include <linux/pci.h>
  35 #include <linux/list.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/module.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/delay.h>
  41 #include <linux/uio.h>
  42 #include <linux/uaccess.h>
  43 #include <linux/fs.h>
  44 #include <linux/compat.h>
  45 #include <linux/blkdev.h>
  46 #include <linux/mutex.h>
  47 #include <linux/poll.h>
  48
  49 #include <scsi/scsi.h>
  50 #include <scsi/scsi_cmnd.h>
  51 #include <scsi/scsi_device.h>
  52 #include <scsi/scsi_host.h>
  53
  54 #include "megaraid_sas_fusion.h"
  55 #include "megaraid_sas.h"
  56
  57 extern void megasas_free_cmds(struct megasas_instance *instance);
  58 extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
  59                                            *instance);
  60 extern void
  61 megasas_complete_cmd(struct megasas_instance *instance,
  62                      struct megasas_cmd *cmd, u8 alt_status);
  63 int megasas_is_ldio(struct scsi_cmnd *cmd);
  64 int
  65 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd);
  66
  67 void
  68 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
  69 int megasas_alloc_cmds(struct megasas_instance *instance);
  70 int
  71 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs);
  72 int
  73 megasas_issue_polled(struct megasas_instance *instance,
  74                      struct megasas_cmd *cmd);
  75 void
  76 megasas_check_and_restore_queue_depth(struct megasas_instance *instance);
  77
  78 u16 get_updated_dev_handle(struct LD_LOAD_BALANCE_INFO *lbInfo,
  79                            struct IO_REQUEST_INFO *in_info);
  80 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
  81 void megaraid_sas_kill_hba(struct megasas_instance *instance);
  82
  83 extern u32 megasas_dbg_lvl;
  84 extern int resetwaittime;
  85
  86 /**
  87  * megasas_enable_intr_fusion - Enables interrupts
  88  * @regs:                       MFI register set
  89  */
  90 void
  91 megasas_enable_intr_fusion(struct megasas_instance *instance)
  92 {
  93         struct megasas_register_set __iomem *regs;
  94         regs = instance->reg_set;
  95         /* For Thunderbolt/Invader also clear intr on enable */
  96         writel(~0, &regs->outbound_intr_status);
  97         readl(&regs->outbound_intr_status);
  98
  99         writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 100
 101         /* Dummy readl to force pci flush */
 102         readl(&regs->outbound_intr_mask);
 103         instance->mask_interrupts = 0;
 104 }
 105
 106 /**
 107  * megasas_disable_intr_fusion - Disables interrupt
 108  * @regs:                        MFI register set
 109  */
 110 void
 111 megasas_disable_intr_fusion(struct megasas_instance *instance)
 112 {
 113         u32 mask = 0xFFFFFFFF;
 114         u32 status;
 115         struct megasas_register_set __iomem *regs;
 116         regs = instance->reg_set;
 117         instance->mask_interrupts = 1;
 118
 119         writel(mask, &regs->outbound_intr_mask);
 120         /* Dummy readl to force pci flush */
 121         status = readl(&regs->outbound_intr_mask);
 122 }
 123
 124 int
 125 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs)
 126 {
 127         u32 status;
 128         /*
 129          * Check if it is our interrupt
 130          */
 131         status = readl(&regs->outbound_intr_status);
 132
 133         if (status & 1) {
 134                 writel(status, &regs->outbound_intr_status);
 135                 readl(&regs->outbound_intr_status);
 136                 return 1;
 137         }
 138         if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
 139                 return 0;
 140
 141         return 1;
 142 }
 143
 144 /**
 145  * megasas_get_cmd_fusion -     Get a command from the free pool
 146  * @instance:           Adapter soft state
 147  *
 148  * Returns a free command from the pool
 149  */
 150 struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 151                                                   *instance)
 152 {
 153         unsigned long flags;
 154         struct fusion_context *fusion =
 155                 (struct fusion_context *)instance->ctrl_context;
 156         struct megasas_cmd_fusion *cmd = NULL;
 157
 158         spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
 159
 160         if (!list_empty(&fusion->cmd_pool)) {
 161                 cmd = list_entry((&fusion->cmd_pool)->next,
 162                                  struct megasas_cmd_fusion, list);
 163                 list_del_init(&cmd->list);
 164         } else {
 165                 printk(KERN_ERR "megasas: Command pool (fusion) empty!\n");
 166         }
 167
 168         spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
 169         return cmd;
 170 }
 171
 172 /**
 173  * megasas_return_cmd_fusion -  Return a cmd to free command pool
 174  * @instance:           Adapter soft state
 175  * @cmd:                Command packet to be returned to free command pool
 176  */
 177 static inline void
 178 megasas_return_cmd_fusion(struct megasas_instance *instance,
 179                           struct megasas_cmd_fusion *cmd)
 180 {
 181         unsigned long flags;
 182         struct fusion_context *fusion =
 183                 (struct fusion_context *)instance->ctrl_context;
 184
 185         spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
 186
 187         cmd->scmd = NULL;
 188         cmd->sync_cmd_idx = (u32)ULONG_MAX;
 189         list_add_tail(&cmd->list, &fusion->cmd_pool);
 190
 191         spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
 192 }
 193
 194 /**
 195  * megasas_teardown_frame_pool_fusion - Destroy the cmd frame DMA pool
 196  * @instance:                           Adapter soft state
 197  */
 198 static void megasas_teardown_frame_pool_fusion(
 199         struct megasas_instance *instance)
 200 {
 201         int i;
 202         struct fusion_context *fusion = instance->ctrl_context;
 203
 204         u16 max_cmd = instance->max_fw_cmds;
 205
 206         struct megasas_cmd_fusion *cmd;
 207
 208         if (!fusion->sg_dma_pool || !fusion->sense_dma_pool) {
 209                 printk(KERN_ERR "megasas: dma pool is null. SG Pool %p, "
 210                        "sense pool : %p\n", fusion->sg_dma_pool,
 211                        fusion->sense_dma_pool);
 212                 return;
 213         }
 214
 215         /*
 216          * Return all frames to pool
 217          */
 218         for (i = 0; i < max_cmd; i++) {
 219
 220                 cmd = fusion->cmd_list[i];
 221
 222                 if (cmd->sg_frame)
 223                         pci_pool_free(fusion->sg_dma_pool, cmd->sg_frame,
 224                                       cmd->sg_frame_phys_addr);
 225
 226                 if (cmd->sense)
 227                         pci_pool_free(fusion->sense_dma_pool, cmd->sense,
 228                                       cmd->sense_phys_addr);
 229         }
 230
 231         /*
 232          * Now destroy the pool itself
 233          */
 234         pci_pool_destroy(fusion->sg_dma_pool);
 235         pci_pool_destroy(fusion->sense_dma_pool);
 236
 237         fusion->sg_dma_pool = NULL;
 238         fusion->sense_dma_pool = NULL;
 239 }
 240
 241 /**
 242  * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
 243  * @instance:           Adapter soft state
 244  */
 245 void
 246 megasas_free_cmds_fusion(struct megasas_instance *instance)
 247 {
 248         int i;
 249         struct fusion_context *fusion = instance->ctrl_context;
 250
 251         u32 max_cmds, req_sz, reply_sz, io_frames_sz;
 252
 253
 254         req_sz = fusion->request_alloc_sz;
 255         reply_sz = fusion->reply_alloc_sz;
 256         io_frames_sz = fusion->io_frames_alloc_sz;
 257
 258         max_cmds = instance->max_fw_cmds;
 259
 260         /* Free descriptors and request Frames memory */
 261         if (fusion->req_frames_desc)
 262                 dma_free_coherent(&instance->pdev->dev, req_sz,
 263                                   fusion->req_frames_desc,
 264                                   fusion->req_frames_desc_phys);
 265
 266         if (fusion->reply_frames_desc) {
 267                 pci_pool_free(fusion->reply_frames_desc_pool,
 268                               fusion->reply_frames_desc,
 269                               fusion->reply_frames_desc_phys);
 270                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 271         }
 272
 273         if (fusion->io_request_frames) {
 274                 pci_pool_free(fusion->io_request_frames_pool,
 275                               fusion->io_request_frames,
 276                               fusion->io_request_frames_phys);
 277                 pci_pool_destroy(fusion->io_request_frames_pool);
 278         }
 279
 280         /* Free the Fusion frame pool */
 281         megasas_teardown_frame_pool_fusion(instance);
 282
 283         /* Free all the commands in the cmd_list */
 284         for (i = 0; i < max_cmds; i++)
 285                 kfree(fusion->cmd_list[i]);
 286
 287         /* Free the cmd_list buffer itself */
 288         kfree(fusion->cmd_list);
 289         fusion->cmd_list = NULL;
 290
 291         INIT_LIST_HEAD(&fusion->cmd_pool);
 292 }
 293
 294 /**
 295  * megasas_create_frame_pool_fusion -   Creates DMA pool for cmd frames
 296  * @instance:                   Adapter soft state
 297  *
 298  */
 299 static int megasas_create_frame_pool_fusion(struct megasas_instance *instance)
 300 {
 301         int i;
 302         u32 max_cmd;
 303         struct fusion_context *fusion;
 304         struct megasas_cmd_fusion *cmd;
 305         u32 total_sz_chain_frame;
 306
 307         fusion = instance->ctrl_context;
 308         max_cmd = instance->max_fw_cmds;
 309
 310         total_sz_chain_frame = MEGASAS_MAX_SZ_CHAIN_FRAME;
 311
 312         /*
 313          * Use DMA pool facility provided by PCI layer
 314          */
 315
 316         fusion->sg_dma_pool = pci_pool_create("megasas sg pool fusion",
 317                                               instance->pdev,
 318                                               total_sz_chain_frame, 4,
 319                                               0);
 320         if (!fusion->sg_dma_pool) {
 321                 printk(KERN_DEBUG "megasas: failed to setup request pool "
 322                        "fusion\n");
 323                 return -ENOMEM;
 324         }
 325         fusion->sense_dma_pool = pci_pool_create("megasas sense pool fusion",
 326                                                  instance->pdev,
 327                                                  SCSI_SENSE_BUFFERSIZE, 64, 0);
 328
 329         if (!fusion->sense_dma_pool) {
 330                 printk(KERN_DEBUG "megasas: failed to setup sense pool "
 331                        "fusion\n");
 332                 pci_pool_destroy(fusion->sg_dma_pool);
 333                 fusion->sg_dma_pool = NULL;
 334                 return -ENOMEM;
 335         }
 336
 337         /*
 338          * Allocate and attach a frame to each of the commands in cmd_list
 339          */
 340         for (i = 0; i < max_cmd; i++) {
 341
 342                 cmd = fusion->cmd_list[i];
 343
 344                 cmd->sg_frame = pci_pool_alloc(fusion->sg_dma_pool,
 345                                                GFP_KERNEL,
 346                                                &cmd->sg_frame_phys_addr);
 347
 348                 cmd->sense = pci_pool_alloc(fusion->sense_dma_pool,
 349                                             GFP_KERNEL, &cmd->sense_phys_addr);
 350                 /*
 351                  * megasas_teardown_frame_pool_fusion() takes care of freeing
 352                  * whatever has been allocated
 353                  */
 354                 if (!cmd->sg_frame || !cmd->sense) {
 355                         printk(KERN_DEBUG "megasas: pci_pool_alloc failed\n");
 356                         megasas_teardown_frame_pool_fusion(instance);
 357                         return -ENOMEM;
 358                 }
 359         }
 360         return 0;
 361 }
 362
 363 /**
 364  * megasas_alloc_cmds_fusion -  Allocates the command packets
 365  * @instance:           Adapter soft state
 366  *
 367  *
 368  * Each frame has a 32-bit field called context. This context is used to get
 369  * back the megasas_cmd_fusion from the frame when a frame gets completed
 370  * In this driver, the 32 bit values are the indices into an array cmd_list.
 371  * This array is used only to look up the megasas_cmd_fusion given the context.
 372  * The free commands themselves are maintained in a linked list called cmd_pool.
 373  *
 374  * cmds are formed in the io_request and sg_frame members of the
 375  * megasas_cmd_fusion. The context field is used to get a request descriptor
 376  * and is used as SMID of the cmd.
 377  * SMID value range is from 1 to max_fw_cmds.
 378  */
 379 int
 380 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 381 {
 382         int i, j, count;
 383         u32 max_cmd, io_frames_sz;
 384         struct fusion_context *fusion;
 385         struct megasas_cmd_fusion *cmd;
 386         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 387         u32 offset;
 388         dma_addr_t io_req_base_phys;
 389         u8 *io_req_base;
 390
 391         fusion = instance->ctrl_context;
 392
 393         max_cmd = instance->max_fw_cmds;
 394
 395         fusion->req_frames_desc =
 396                 dma_alloc_coherent(&instance->pdev->dev,
 397                                    fusion->request_alloc_sz,
 398                                    &fusion->req_frames_desc_phys, GFP_KERNEL);
 399
 400         if (!fusion->req_frames_desc) {
 401                 printk(KERN_ERR "megasas; Could not allocate memory for "
 402                        "request_frames\n");
 403                 goto fail_req_desc;
 404         }
 405
 406         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 407         fusion->reply_frames_desc_pool =
 408                 pci_pool_create("reply_frames pool", instance->pdev,
 409                                 fusion->reply_alloc_sz * count, 16, 0);
 410
 411         if (!fusion->reply_frames_desc_pool) {
 412                 printk(KERN_ERR "megasas; Could not allocate memory for "
 413                        "reply_frame pool\n");
 414                 goto fail_reply_desc;
 415         }
 416
 417         fusion->reply_frames_desc =
 418                 pci_pool_alloc(fusion->reply_frames_desc_pool, GFP_KERNEL,
 419                                &fusion->reply_frames_desc_phys);
 420         if (!fusion->reply_frames_desc) {
 421                 printk(KERN_ERR "megasas; Could not allocate memory for "
 422                        "reply_frame pool\n");
 423                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 424                 goto fail_reply_desc;
 425         }
 426
 427         reply_desc = fusion->reply_frames_desc;
 428         for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
 429                 reply_desc->Words = ULLONG_MAX;
 430
 431         io_frames_sz = fusion->io_frames_alloc_sz;
 432
 433         fusion->io_request_frames_pool =
 434                 pci_pool_create("io_request_frames pool", instance->pdev,
 435                                 fusion->io_frames_alloc_sz, 16, 0);
 436
 437         if (!fusion->io_request_frames_pool) {
 438                 printk(KERN_ERR "megasas: Could not allocate memory for "
 439                        "io_request_frame pool\n");
 440                 goto fail_io_frames;
 441         }
 442
 443         fusion->io_request_frames =
 444                 pci_pool_alloc(fusion->io_request_frames_pool, GFP_KERNEL,
 445                                &fusion->io_request_frames_phys);
 446         if (!fusion->io_request_frames) {
 447                 printk(KERN_ERR "megasas: Could not allocate memory for "
 448                        "io_request_frames frames\n");
 449                 pci_pool_destroy(fusion->io_request_frames_pool);
 450                 goto fail_io_frames;
 451         }
 452
 453         /*
 454          * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
 455          * Allocate the dynamic array first and then allocate individual
 456          * commands.
 457          */
 458         fusion->cmd_list = kzalloc(sizeof(struct megasas_cmd_fusion *)
 459                                    * max_cmd, GFP_KERNEL);
 460
 461         if (!fusion->cmd_list) {
 462                 printk(KERN_DEBUG "megasas: out of memory. Could not alloc "
 463                        "memory for cmd_list_fusion\n");
 464                 goto fail_cmd_list;
 465         }
 466
 467         max_cmd = instance->max_fw_cmds;
 468         for (i = 0; i < max_cmd; i++) {
 469                 fusion->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd_fusion),
 470                                               GFP_KERNEL);
 471                 if (!fusion->cmd_list[i]) {
 472                         printk(KERN_ERR "Could not alloc cmd list fusion\n");
 473
 474                         for (j = 0; j < i; j++)
 475                                 kfree(fusion->cmd_list[j]);
 476
 477                         kfree(fusion->cmd_list);
 478                         fusion->cmd_list = NULL;
 479                         goto fail_cmd_list;
 480                 }
 481         }
 482
 483         /* The first 256 bytes (SMID 0) is not used. Don't add to cmd list */
 484         io_req_base = fusion->io_request_frames +
 485                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 486         io_req_base_phys = fusion->io_request_frames_phys +
 487                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 488
 489         /*
 490          * Add all the commands to command pool (fusion->cmd_pool)
 491          */
 492
 493         /* SMID 0 is reserved. Set SMID/index from 1 */
 494         for (i = 0; i < max_cmd; i++) {
 495                 cmd = fusion->cmd_list[i];
 496                 offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
 497                 memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 498                 cmd->index = i + 1;
 499                 cmd->scmd = NULL;
 500                 cmd->sync_cmd_idx = (u32)ULONG_MAX; /* Set to Invalid */
 501                 cmd->instance = instance;
 502                 cmd->io_request =
 503                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
 504                   (io_req_base + offset);
 505                 memset(cmd->io_request, 0,
 506                        sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 507                 cmd->io_request_phys_addr = io_req_base_phys + offset;
 508
 509                 list_add_tail(&cmd->list, &fusion->cmd_pool);
 510         }
 511
 512         /*
 513          * Create a frame pool and assign one frame to each cmd
 514          */
 515         if (megasas_create_frame_pool_fusion(instance)) {
 516                 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
 517                 megasas_free_cmds_fusion(instance);
 518                 goto fail_req_desc;
 519         }
 520
 521         return 0;
 522
 523 fail_cmd_list:
 524         pci_pool_free(fusion->io_request_frames_pool, fusion->io_request_frames,
 525                       fusion->io_request_frames_phys);
 526         pci_pool_destroy(fusion->io_request_frames_pool);
 527 fail_io_frames:
 528         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 529                           fusion->reply_frames_desc,
 530                           fusion->reply_frames_desc_phys);
 531         pci_pool_free(fusion->reply_frames_desc_pool,
 532                       fusion->reply_frames_desc,
 533                       fusion->reply_frames_desc_phys);
 534         pci_pool_destroy(fusion->reply_frames_desc_pool);
 535
 536 fail_reply_desc:
 537         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 538                           fusion->req_frames_desc,
 539                           fusion->req_frames_desc_phys);
 540 fail_req_desc:
 541         return -ENOMEM;
 542 }
 543
 544 /**
 545  * wait_and_poll -      Issues a polling command
 546  * @instance:                   Adapter soft state
 547  * @cmd:                        Command packet to be issued
 548  *
 549  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
 550  */
 551 int
 552 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd)
 553 {
 554         int i;
 555         struct megasas_header *frame_hdr = &cmd->frame->hdr;
 556
 557         u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
 558
 559         /*
 560          * Wait for cmd_status to change
 561          */
 562         for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
 563                 rmb();
 564                 msleep(20);
 565         }
 566
 567         if (frame_hdr->cmd_status == 0xff)
 568                 return -ETIME;
 569
 570         return 0;
 571 }
 572
 573 /**
 574  * megasas_ioc_init_fusion -    Initializes the FW
 575  * @instance:           Adapter soft state
 576  *
 577  * Issues the IOC Init cmd
 578  */
 579 int
 580 megasas_ioc_init_fusion(struct megasas_instance *instance)
 581 {
 582         struct megasas_init_frame *init_frame;
 583         struct MPI2_IOC_INIT_REQUEST *IOCInitMessage;
 584         dma_addr_t      ioc_init_handle;
 585         struct megasas_cmd *cmd;
 586         u8 ret;
 587         struct fusion_context *fusion;
 588         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
 589         int i;
 590         struct megasas_header *frame_hdr;
 591
 592         fusion = instance->ctrl_context;
 593
 594         cmd = megasas_get_cmd(instance);
 595
 596         if (!cmd) {
 597                 printk(KERN_ERR "Could not allocate cmd for INIT Frame\n");
 598                 ret = 1;
 599                 goto fail_get_cmd;
 600         }
 601
 602         IOCInitMessage =
 603           dma_alloc_coherent(&instance->pdev->dev,
 604                              sizeof(struct MPI2_IOC_INIT_REQUEST),
 605                              &ioc_init_handle, GFP_KERNEL);
 606
 607         if (!IOCInitMessage) {
 608                 printk(KERN_ERR "Could not allocate memory for "
 609                        "IOCInitMessage\n");
 610                 ret = 1;
 611                 goto fail_fw_init;
 612         }
 613
 614         memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
 615
 616         IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
 617         IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
 618         IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION);
 619         IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
 620         IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4);
 621
 622         IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth);
 623         IOCInitMessage->ReplyDescriptorPostQueueAddress = cpu_to_le64(fusion->reply_frames_desc_phys);
 624         IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys);
 625         IOCInitMessage->HostMSIxVectors = instance->msix_vectors;
 626         init_frame = (struct megasas_init_frame *)cmd->frame;
 627         memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
 628
 629         frame_hdr = &cmd->frame->hdr;
 630         frame_hdr->cmd_status = 0xFF;
 631         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
 632
 633         init_frame->cmd = MFI_CMD_INIT;
 634         init_frame->cmd_status = 0xFF;
 635
 636         /* driver support Extended MSIX */
 637         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
 638                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
 639                 init_frame->driver_operations.
 640                         mfi_capabilities.support_additional_msix = 1;
 641         /* driver supports HA / Remote LUN over Fast Path interface */
 642         init_frame->driver_operations.mfi_capabilities.support_fp_remote_lun
 643                 = 1;
 644         /* Convert capability to LE32 */
 645         cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
 646
 647         init_frame->queue_info_new_phys_addr_lo = cpu_to_le32((u32)ioc_init_handle);
 648         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
 649
 650         req_desc =
 651           (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)fusion->req_frames_desc;
 652
 653         req_desc->Words = 0;
 654         req_desc->MFAIo.RequestFlags =
 655                 (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
 656                  MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 657         cpu_to_le32s((u32 *)&req_desc->MFAIo);
 658         req_desc->Words |= cpu_to_le64(cmd->frame_phys_addr);
 659
 660         /*
 661          * disable the intr before firing the init frame
 662          */
 663         instance->instancet->disable_intr(instance);
 664
 665         for (i = 0; i < (10 * 1000); i += 20) {
 666                 if (readl(&instance->reg_set->doorbell) & 1)
 667                         msleep(20);
 668                 else
 669                         break;
 670         }
 671
 672         instance->instancet->fire_cmd(instance, req_desc->u.low,
 673                                       req_desc->u.high, instance->reg_set);
 674
 675         wait_and_poll(instance, cmd);
 676
 677         frame_hdr = &cmd->frame->hdr;
 678         if (frame_hdr->cmd_status != 0) {
 679                 ret = 1;
 680                 goto fail_fw_init;
 681         }
 682         printk(KERN_ERR "megasas:IOC Init cmd success\n");
 683
 684         ret = 0;
 685
 686 fail_fw_init:
 687         megasas_return_cmd(instance, cmd);
 688         if (IOCInitMessage)
 689                 dma_free_coherent(&instance->pdev->dev,
 690                                   sizeof(struct MPI2_IOC_INIT_REQUEST),
 691                                   IOCInitMessage, ioc_init_handle);
 692 fail_get_cmd:
 693         return ret;
 694 }
 695
 696 /*
 697  * megasas_get_ld_map_info -    Returns FW's ld_map structure
 698  * @instance:                           Adapter soft state
 699  * @pend:                               Pend the command or not
 700  * Issues an internal command (DCMD) to get the FW's controller PD
 701  * list structure.  This information is mainly used to find out SYSTEM
 702  * supported by the FW.
 703  */
 704 static int
 705 megasas_get_ld_map_info(struct megasas_instance *instance)
 706 {
 707         int ret = 0;
 708         struct megasas_cmd *cmd;
 709         struct megasas_dcmd_frame *dcmd;
 710         struct MR_FW_RAID_MAP_ALL *ci;
 711         dma_addr_t ci_h = 0;
 712         u32 size_map_info;
 713         struct fusion_context *fusion;
 714
 715         cmd = megasas_get_cmd(instance);
 716
 717         if (!cmd) {
 718                 printk(KERN_DEBUG "megasas: Failed to get cmd for map info.\n");
 719                 return -ENOMEM;
 720         }
 721
 722         fusion = instance->ctrl_context;
 723
 724         if (!fusion) {
 725                 megasas_return_cmd(instance, cmd);
 726                 return 1;
 727         }
 728
 729         dcmd = &cmd->frame->dcmd;
 730
 731         size_map_info = sizeof(struct MR_FW_RAID_MAP) +
 732                 (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 733
 734         ci = fusion->ld_map[(instance->map_id & 1)];
 735         ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
 736
 737         if (!ci) {
 738                 printk(KERN_DEBUG "Failed to alloc mem for ld_map_info\n");
 739                 megasas_return_cmd(instance, cmd);
 740                 return -ENOMEM;
 741         }
 742
 743         memset(ci, 0, sizeof(*ci));
 744         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 745
 746         dcmd->cmd = MFI_CMD_DCMD;
 747         dcmd->cmd_status = 0xFF;
 748         dcmd->sge_count = 1;
 749         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
 750         dcmd->timeout = 0;
 751         dcmd->pad_0 = 0;
 752         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
 753         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
 754         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
 755         dcmd->sgl.sge32[0].length = cpu_to_le32(size_map_info);
 756
 757         if (!megasas_issue_polled(instance, cmd))
 758                 ret = 0;
 759         else {
 760                 printk(KERN_ERR "megasas: Get LD Map Info Failed\n");
 761                 ret = -1;
 762         }
 763
 764         megasas_return_cmd(instance, cmd);
 765
 766         return ret;
 767 }
 768
 769 u8
 770 megasas_get_map_info(struct megasas_instance *instance)
 771 {
 772         struct fusion_context *fusion = instance->ctrl_context;
 773
 774         fusion->fast_path_io = 0;
 775         if (!megasas_get_ld_map_info(instance)) {
 776                 if (MR_ValidateMapInfo(instance)) {
 777                         fusion->fast_path_io = 1;
 778                         return 0;
 779                 }
 780         }
 781         return 1;
 782 }
 783
 784 /*
 785  * megasas_sync_map_info -      Returns FW's ld_map structure
 786  * @instance:                           Adapter soft state
 787  *
 788  * Issues an internal command (DCMD) to get the FW's controller PD
 789  * list structure.  This information is mainly used to find out SYSTEM
 790  * supported by the FW.
 791  */
 792 int
 793 megasas_sync_map_info(struct megasas_instance *instance)
 794 {
 795         int ret = 0, i;
 796         struct megasas_cmd *cmd;
 797         struct megasas_dcmd_frame *dcmd;
 798         u32 size_sync_info, num_lds;
 799         struct fusion_context *fusion;
 800         struct MR_LD_TARGET_SYNC *ci = NULL;
 801         struct MR_FW_RAID_MAP_ALL *map;
 802         struct MR_LD_RAID  *raid;
 803         struct MR_LD_TARGET_SYNC *ld_sync;
 804         dma_addr_t ci_h = 0;
 805         u32 size_map_info;
 806
 807         cmd = megasas_get_cmd(instance);
 808
 809         if (!cmd) {
 810                 printk(KERN_DEBUG "megasas: Failed to get cmd for sync"
 811                        "info.\n");
 812                 return -ENOMEM;
 813         }
 814
 815         fusion = instance->ctrl_context;
 816
 817         if (!fusion) {
 818                 megasas_return_cmd(instance, cmd);
 819                 return 1;
 820         }
 821
 822         map = fusion->ld_map[instance->map_id & 1];
 823
 824         num_lds = le32_to_cpu(map->raidMap.ldCount);
 825
 826         dcmd = &cmd->frame->dcmd;
 827
 828         size_sync_info = sizeof(struct MR_LD_TARGET_SYNC) *num_lds;
 829
 830         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 831
 832         ci = (struct MR_LD_TARGET_SYNC *)
 833           fusion->ld_map[(instance->map_id - 1) & 1];
 834         memset(ci, 0, sizeof(struct MR_FW_RAID_MAP_ALL));
 835
 836         ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
 837
 838         ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
 839
 840         for (i = 0; i < num_lds; i++, ld_sync++) {
 841                 raid = MR_LdRaidGet(i, map);
 842                 ld_sync->targetId = MR_GetLDTgtId(i, map);
 843                 ld_sync->seqNum = raid->seqNum;
 844         }
 845
 846         size_map_info = sizeof(struct MR_FW_RAID_MAP) +
 847                 (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 848
 849         dcmd->cmd = MFI_CMD_DCMD;
 850         dcmd->cmd_status = 0xFF;
 851         dcmd->sge_count = 1;
 852         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_WRITE);
 853         dcmd->timeout = 0;
 854         dcmd->pad_0 = 0;
 855         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
 856         dcmd->mbox.b[0] = num_lds;
 857         dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
 858         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
 859         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
 860         dcmd->sgl.sge32[0].length = cpu_to_le32(size_map_info);
 861
 862         instance->map_update_cmd = cmd;
 863
 864         instance->instancet->issue_dcmd(instance, cmd);
 865
 866         return ret;
 867 }
 868
 869 /*
 870  * meagasas_display_intel_branding - Display branding string
 871  * @instance: per adapter object
 872  *
 873  * Return nothing.
 874  */
 875 static void
 876 megasas_display_intel_branding(struct megasas_instance *instance)
 877 {
 878         if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL)
 879                 return;
 880
 881         switch (instance->pdev->device) {
 882         case PCI_DEVICE_ID_LSI_INVADER:
 883                 switch (instance->pdev->subsystem_device) {
 884                 case MEGARAID_INTEL_RS3DC080_SSDID:
 885                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 886                                 instance->host->host_no,
 887                                 MEGARAID_INTEL_RS3DC080_BRANDING);
 888                         break;
 889                 case MEGARAID_INTEL_RS3DC040_SSDID:
 890                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 891                                 instance->host->host_no,
 892                                 MEGARAID_INTEL_RS3DC040_BRANDING);
 893                         break;
 894                 case MEGARAID_INTEL_RS3SC008_SSDID:
 895                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 896                                 instance->host->host_no,
 897                                 MEGARAID_INTEL_RS3SC008_BRANDING);
 898                         break;
 899                 case MEGARAID_INTEL_RS3MC044_SSDID:
 900                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 901                                 instance->host->host_no,
 902                                 MEGARAID_INTEL_RS3MC044_BRANDING);
 903                         break;
 904                 default:
 905                         break;
 906                 }
 907                 break;
 908         case PCI_DEVICE_ID_LSI_FURY:
 909                 switch (instance->pdev->subsystem_device) {
 910                 case MEGARAID_INTEL_RS3WC080_SSDID:
 911                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 912                                 instance->host->host_no,
 913                                 MEGARAID_INTEL_RS3WC080_BRANDING);
 914                         break;
 915                 case MEGARAID_INTEL_RS3WC040_SSDID:
 916                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 917                                 instance->host->host_no,
 918                                 MEGARAID_INTEL_RS3WC040_BRANDING);
 919                         break;
 920                 default:
 921                         break;
 922                 }
 923                 break;
 924         default:
 925                 break;
 926         }
 927 }
 928
 929 /**
 930  * megasas_init_adapter_fusion -        Initializes the FW
 931  * @instance:           Adapter soft state
 932  *
 933  * This is the main function for initializing firmware.
 934  */
 935 u32
 936 megasas_init_adapter_fusion(struct megasas_instance *instance)
 937 {
 938         struct megasas_register_set __iomem *reg_set;
 939         struct fusion_context *fusion;
 940         u32 max_cmd;
 941         int i = 0, count;
 942
 943         fusion = instance->ctrl_context;
 944
 945         reg_set = instance->reg_set;
 946
 947         /*
 948          * Get various operational parameters from status register
 949          */
 950         instance->max_fw_cmds =
 951                 instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
 952         instance->max_fw_cmds = min(instance->max_fw_cmds, (u16)1008);
 953
 954         /*
 955          * Reduce the max supported cmds by 1. This is to ensure that the
 956          * reply_q_sz (1 more than the max cmd that driver may send)
 957          * does not exceed max cmds that the FW can support
 958          */
 959         instance->max_fw_cmds = instance->max_fw_cmds-1;
 960         /* Only internal cmds (DCMD) need to have MFI frames */
 961         instance->max_mfi_cmds = MEGASAS_INT_CMDS;
 962
 963         max_cmd = instance->max_fw_cmds;
 964
 965         fusion->reply_q_depth = ((max_cmd + 1 + 15)/16)*16;
 966
 967         fusion->request_alloc_sz =
 968                 sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *max_cmd;
 969         fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)
 970                 *(fusion->reply_q_depth);
 971         fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
 972                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE *
 973                  (max_cmd + 1)); /* Extra 1 for SMID 0 */
 974
 975         fusion->max_sge_in_main_msg =
 976           (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
 977            offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
 978
 979         fusion->max_sge_in_chain =
 980                 MEGASAS_MAX_SZ_CHAIN_FRAME / sizeof(union MPI2_SGE_IO_UNION);
 981
 982         instance->max_num_sge = fusion->max_sge_in_main_msg +
 983                 fusion->max_sge_in_chain - 2;
 984
 985         /* Used for pass thru MFI frame (DCMD) */
 986         fusion->chain_offset_mfi_pthru =
 987                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
 988
 989         fusion->chain_offset_io_request =
 990                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
 991                  sizeof(union MPI2_SGE_IO_UNION))/16;
 992
 993         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 994         for (i = 0 ; i < count; i++)
 995                 fusion->last_reply_idx[i] = 0;
 996
 997         /*
 998          * Allocate memory for descriptors
 999          * Create a pool of commands
1000          */
1001         if (megasas_alloc_cmds(instance))
1002                 goto fail_alloc_mfi_cmds;
1003         if (megasas_alloc_cmds_fusion(instance))
1004                 goto fail_alloc_cmds;
1005
1006         if (megasas_ioc_init_fusion(instance))
1007                 goto fail_ioc_init;
1008
1009         megasas_display_intel_branding(instance);
1010
1011         instance->flag_ieee = 1;
1012
1013         fusion->map_sz =  sizeof(struct MR_FW_RAID_MAP) +
1014           (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
1015
1016         fusion->fast_path_io = 0;
1017
1018         for (i = 0; i < 2; i++) {
1019                 fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
1020                                                        fusion->map_sz,
1021                                                        &fusion->ld_map_phys[i],
1022                                                        GFP_KERNEL);
1023                 if (!fusion->ld_map[i]) {
1024                         printk(KERN_ERR "megasas: Could not allocate memory "
1025                                "for map info\n");
1026                         goto fail_map_info;
1027                 }
1028         }
1029
1030         if (!megasas_get_map_info(instance))
1031                 megasas_sync_map_info(instance);
1032
1033         return 0;
1034
1035 fail_map_info:
1036         if (i == 1)
1037                 dma_free_coherent(&instance->pdev->dev, fusion->map_sz,
1038                                   fusion->ld_map[0], fusion->ld_map_phys[0]);
1039 fail_ioc_init:
1040         megasas_free_cmds_fusion(instance);
1041 fail_alloc_cmds:
1042         megasas_free_cmds(instance);
1043 fail_alloc_mfi_cmds:
1044         return 1;
1045 }
1046
1047 /**
1048  * megasas_fire_cmd_fusion -    Sends command to the FW
1049  * @frame_phys_addr :           Physical address of cmd
1050  * @frame_count :               Number of frames for the command
1051  * @regs :                      MFI register set
1052  */
1053 void
1054 megasas_fire_cmd_fusion(struct megasas_instance *instance,
1055                         dma_addr_t req_desc_lo,
1056                         u32 req_desc_hi,
1057                         struct megasas_register_set __iomem *regs)
1058 {
1059         unsigned long flags;
1060
1061         spin_lock_irqsave(&instance->hba_lock, flags);
1062
1063         writel(le32_to_cpu(req_desc_lo), &(regs)->inbound_low_queue_port);
1064         writel(le32_to_cpu(req_desc_hi), &(regs)->inbound_high_queue_port);
1065         spin_unlock_irqrestore(&instance->hba_lock, flags);
1066 }
1067
1068 /**
1069  * map_cmd_status -     Maps FW cmd status to OS cmd status
1070  * @cmd :               Pointer to cmd
1071  * @status :            status of cmd returned by FW
1072  * @ext_status :        ext status of cmd returned by FW
1073  */
1074
1075 void
1076 map_cmd_status(struct megasas_cmd_fusion *cmd, u8 status, u8 ext_status)
1077 {
1078
1079         switch (status) {
1080
1081         case MFI_STAT_OK:
1082                 cmd->scmd->result = DID_OK << 16;
1083                 break;
1084
1085         case MFI_STAT_SCSI_IO_FAILED:
1086         case MFI_STAT_LD_INIT_IN_PROGRESS:
1087                 cmd->scmd->result = (DID_ERROR << 16) | ext_status;
1088                 break;
1089
1090         case MFI_STAT_SCSI_DONE_WITH_ERROR:
1091
1092                 cmd->scmd->result = (DID_OK << 16) | ext_status;
1093                 if (ext_status == SAM_STAT_CHECK_CONDITION) {
1094                         memset(cmd->scmd->sense_buffer, 0,
1095                                SCSI_SENSE_BUFFERSIZE);
1096                         memcpy(cmd->scmd->sense_buffer, cmd->sense,
1097                                SCSI_SENSE_BUFFERSIZE);
1098                         cmd->scmd->result |= DRIVER_SENSE << 24;
1099                 }
1100                 break;
1101
1102         case MFI_STAT_LD_OFFLINE:
1103         case MFI_STAT_DEVICE_NOT_FOUND:
1104                 cmd->scmd->result = DID_BAD_TARGET << 16;
1105                 break;
1106         case MFI_STAT_CONFIG_SEQ_MISMATCH:
1107                 cmd->scmd->result = DID_IMM_RETRY << 16;
1108                 break;
1109         default:
1110                 printk(KERN_DEBUG "megasas: FW status %#x\n", status);
1111                 cmd->scmd->result = DID_ERROR << 16;
1112                 break;
1113         }
1114 }
1115
1116 /**
1117  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
1118  * @instance:           Adapter soft state
1119  * @scp:                SCSI command from the mid-layer
1120  * @sgl_ptr:            SGL to be filled in
1121  * @cmd:                cmd we are working on
1122  *
1123  * If successful, this function returns the number of SG elements.
1124  */
1125 static int
1126 megasas_make_sgl_fusion(struct megasas_instance *instance,
1127                         struct scsi_cmnd *scp,
1128                         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
1129                         struct megasas_cmd_fusion *cmd)
1130 {
1131         int i, sg_processed, sge_count;
1132         struct scatterlist *os_sgl;
1133         struct fusion_context *fusion;
1134
1135         fusion = instance->ctrl_context;
1136
1137         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1138                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1139                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
1140                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
1141                 sgl_ptr_end->Flags = 0;
1142         }
1143
1144         sge_count = scsi_dma_map(scp);
1145
1146         BUG_ON(sge_count < 0);
1147
1148         if (sge_count > instance->max_num_sge || !sge_count)
1149                 return sge_count;
1150
1151         scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1152                 sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl));
1153                 sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl));
1154                 sgl_ptr->Flags = 0;
1155                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1156                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1157                         if (i == sge_count - 1)
1158                                 sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
1159                 }
1160                 sgl_ptr++;
1161
1162                 sg_processed = i + 1;
1163
1164                 if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
1165                     (sge_count > fusion->max_sge_in_main_msg)) {
1166
1167                         struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
1168                         if ((instance->pdev->device ==
1169                                 PCI_DEVICE_ID_LSI_INVADER) ||
1170                                 (instance->pdev->device ==
1171                                 PCI_DEVICE_ID_LSI_FURY)) {
1172                                 if ((le16_to_cpu(cmd->io_request->IoFlags) &
1173                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
1174                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
1175                                         cmd->io_request->ChainOffset =
1176                                                 fusion->
1177                                                 chain_offset_io_request;
1178                                 else
1179                                         cmd->io_request->ChainOffset = 0;
1180                         } else
1181                                 cmd->io_request->ChainOffset =
1182                                         fusion->chain_offset_io_request;
1183
1184                         sg_chain = sgl_ptr;
1185                         /* Prepare chain element */
1186                         sg_chain->NextChainOffset = 0;
1187                         if ((instance->pdev->device ==
1188                                 PCI_DEVICE_ID_LSI_INVADER) ||
1189                                 (instance->pdev->device ==
1190                                 PCI_DEVICE_ID_LSI_FURY))
1191                                 sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
1192                         else
1193                                 sg_chain->Flags =
1194                                         (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
1195                                          MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
1196                         sg_chain->Length =  cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed)));
1197                         sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr);
1198
1199                         sgl_ptr =
1200                           (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
1201                 }
1202         }
1203
1204         return sge_count;
1205 }
1206
1207 /**
1208  * megasas_set_pd_lba - Sets PD LBA
1209  * @cdb:                CDB
1210  * @cdb_len:            cdb length
1211  * @start_blk:          Start block of IO
1212  *
1213  * Used to set the PD LBA in CDB for FP IOs
1214  */
1215 void
1216 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
1217                    struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
1218                    struct MR_FW_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
1219 {
1220         struct MR_LD_RAID *raid;
1221         u32 ld;
1222         u64 start_blk = io_info->pdBlock;
1223         u8 *cdb = io_request->CDB.CDB32;
1224         u32 num_blocks = io_info->numBlocks;
1225         u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
1226
1227         /* Check if T10 PI (DIF) is enabled for this LD */
1228         ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
1229         raid = MR_LdRaidGet(ld, local_map_ptr);
1230         if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
1231                 memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1232                 cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
1233                 cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
1234
1235                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1236                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
1237                 else
1238                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
1239                 cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
1240
1241                 /* LBA */
1242                 cdb[12] = (u8)((start_blk >> 56) & 0xff);
1243                 cdb[13] = (u8)((start_blk >> 48) & 0xff);
1244                 cdb[14] = (u8)((start_blk >> 40) & 0xff);
1245                 cdb[15] = (u8)((start_blk >> 32) & 0xff);
1246                 cdb[16] = (u8)((start_blk >> 24) & 0xff);
1247                 cdb[17] = (u8)((start_blk >> 16) & 0xff);
1248                 cdb[18] = (u8)((start_blk >> 8) & 0xff);
1249                 cdb[19] = (u8)(start_blk & 0xff);
1250
1251                 /* Logical block reference tag */
1252                 io_request->CDB.EEDP32.PrimaryReferenceTag =
1253                         cpu_to_be32(ref_tag);
1254                 io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0xffff;
1255                 io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */
1256
1257                 /* Transfer length */
1258                 cdb[28] = (u8)((num_blocks >> 24) & 0xff);
1259                 cdb[29] = (u8)((num_blocks >> 16) & 0xff);
1260                 cdb[30] = (u8)((num_blocks >> 8) & 0xff);
1261                 cdb[31] = (u8)(num_blocks & 0xff);
1262
1263                 /* set SCSI IO EEDPFlags */
1264                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) {
1265                         io_request->EEDPFlags = cpu_to_le16(
1266                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
1267                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
1268                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
1269                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
1270                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD);
1271                 } else {
1272                         io_request->EEDPFlags = cpu_to_le16(
1273                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
1274                                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP);
1275                 }
1276                 io_request->Control |= cpu_to_le32((0x4 << 26));
1277                 io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size);
1278         } else {
1279                 /* Some drives don't support 16/12 byte CDB's, convert to 10 */
1280                 if (((cdb_len == 12) || (cdb_len == 16)) &&
1281                     (start_blk <= 0xffffffff)) {
1282                         if (cdb_len == 16) {
1283                                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
1284                                 flagvals = cdb[1];
1285                                 groupnum = cdb[14];
1286                                 control = cdb[15];
1287                         } else {
1288                                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
1289                                 flagvals = cdb[1];
1290                                 groupnum = cdb[10];
1291                                 control = cdb[11];
1292                         }
1293
1294                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1295
1296                         cdb[0] = opcode;
1297                         cdb[1] = flagvals;
1298                         cdb[6] = groupnum;
1299                         cdb[9] = control;
1300
1301                         /* Transfer length */
1302                         cdb[8] = (u8)(num_blocks & 0xff);
1303                         cdb[7] = (u8)((num_blocks >> 8) & 0xff);
1304
1305                         io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */
1306                         cdb_len = 10;
1307                 } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
1308                         /* Convert to 16 byte CDB for large LBA's */
1309                         switch (cdb_len) {
1310                         case 6:
1311                                 opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
1312                                 control = cdb[5];
1313                                 break;
1314                         case 10:
1315                                 opcode =
1316                                         cdb[0] == READ_10 ? READ_16 : WRITE_16;
1317                                 flagvals = cdb[1];
1318                                 groupnum = cdb[6];
1319                                 control = cdb[9];
1320                                 break;
1321                         case 12:
1322                                 opcode =
1323                                         cdb[0] == READ_12 ? READ_16 : WRITE_16;
1324                                 flagvals = cdb[1];
1325                                 groupnum = cdb[10];
1326                                 control = cdb[11];
1327                                 break;
1328                         }
1329
1330                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1331
1332                         cdb[0] = opcode;
1333                         cdb[1] = flagvals;
1334                         cdb[14] = groupnum;
1335                         cdb[15] = control;
1336
1337                         /* Transfer length */
1338                         cdb[13] = (u8)(num_blocks & 0xff);
1339                         cdb[12] = (u8)((num_blocks >> 8) & 0xff);
1340                         cdb[11] = (u8)((num_blocks >> 16) & 0xff);
1341                         cdb[10] = (u8)((num_blocks >> 24) & 0xff);
1342
1343                         io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */
1344                         cdb_len = 16;
1345                 }
1346
1347                 /* Normal case, just load LBA here */
1348                 switch (cdb_len) {
1349                 case 6:
1350                 {
1351                         u8 val = cdb[1] & 0xE0;
1352                         cdb[3] = (u8)(start_blk & 0xff);
1353                         cdb[2] = (u8)((start_blk >> 8) & 0xff);
1354                         cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
1355                         break;
1356                 }
1357                 case 10:
1358                         cdb[5] = (u8)(start_blk & 0xff);
1359                         cdb[4] = (u8)((start_blk >> 8) & 0xff);
1360                         cdb[3] = (u8)((start_blk >> 16) & 0xff);
1361                         cdb[2] = (u8)((start_blk >> 24) & 0xff);
1362                         break;
1363                 case 12:
1364                         cdb[5]    = (u8)(start_blk & 0xff);
1365                         cdb[4]    = (u8)((start_blk >> 8) & 0xff);
1366                         cdb[3]    = (u8)((start_blk >> 16) & 0xff);
1367                         cdb[2]    = (u8)((start_blk >> 24) & 0xff);
1368                         break;
1369                 case 16:
1370                         cdb[9]    = (u8)(start_blk & 0xff);
1371                         cdb[8]    = (u8)((start_blk >> 8) & 0xff);
1372                         cdb[7]    = (u8)((start_blk >> 16) & 0xff);
1373                         cdb[6]    = (u8)((start_blk >> 24) & 0xff);
1374                         cdb[5]    = (u8)((start_blk >> 32) & 0xff);
1375                         cdb[4]    = (u8)((start_blk >> 40) & 0xff);
1376                         cdb[3]    = (u8)((start_blk >> 48) & 0xff);
1377                         cdb[2]    = (u8)((start_blk >> 56) & 0xff);
1378                         break;
1379                 }
1380         }
1381 }
1382
1383 /**
1384  * megasas_build_ldio_fusion -  Prepares IOs to devices
1385  * @instance:           Adapter soft state
1386  * @scp:                SCSI command
1387  * @cmd:                Command to be prepared
1388  *
1389  * Prepares the io_request and chain elements (sg_frame) for IO
1390  * The IO can be for PD (Fast Path) or LD
1391  */
1392 void
1393 megasas_build_ldio_fusion(struct megasas_instance *instance,
1394                           struct scsi_cmnd *scp,
1395                           struct megasas_cmd_fusion *cmd)
1396 {
1397         u8 fp_possible;
1398         u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
1399         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1400         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1401         struct IO_REQUEST_INFO io_info;
1402         struct fusion_context *fusion;
1403         struct MR_FW_RAID_MAP_ALL *local_map_ptr;
1404         u8 *raidLUN;
1405
1406         device_id = MEGASAS_DEV_INDEX(instance, scp);
1407
1408         fusion = instance->ctrl_context;
1409
1410         io_request = cmd->io_request;
1411         io_request->RaidContext.VirtualDiskTgtId = cpu_to_le16(device_id);
1412         io_request->RaidContext.status = 0;
1413         io_request->RaidContext.exStatus = 0;
1414
1415         req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc;
1416
1417         start_lba_lo = 0;
1418         start_lba_hi = 0;
1419         fp_possible = 0;
1420
1421         /*
1422          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1423          */
1424         if (scp->cmd_len == 6) {
1425                 datalength = (u32) scp->cmnd[4];
1426                 start_lba_lo = ((u32) scp->cmnd[1] << 16) |
1427                         ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
1428
1429                 start_lba_lo &= 0x1FFFFF;
1430         }
1431
1432         /*
1433          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1434          */
1435         else if (scp->cmd_len == 10) {
1436                 datalength = (u32) scp->cmnd[8] |
1437                         ((u32) scp->cmnd[7] << 8);
1438                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1439                         ((u32) scp->cmnd[3] << 16) |
1440                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1441         }
1442
1443         /*
1444          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1445          */
1446         else if (scp->cmd_len == 12) {
1447                 datalength = ((u32) scp->cmnd[6] << 24) |
1448                         ((u32) scp->cmnd[7] << 16) |
1449                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1450                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1451                         ((u32) scp->cmnd[3] << 16) |
1452                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1453         }
1454
1455         /*
1456          * 16-byte READ(0x88) or WRITE(0x8A) cdb
1457          */
1458         else if (scp->cmd_len == 16) {
1459                 datalength = ((u32) scp->cmnd[10] << 24) |
1460                         ((u32) scp->cmnd[11] << 16) |
1461                         ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
1462                 start_lba_lo = ((u32) scp->cmnd[6] << 24) |
1463                         ((u32) scp->cmnd[7] << 16) |
1464                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1465
1466                 start_lba_hi = ((u32) scp->cmnd[2] << 24) |
1467                         ((u32) scp->cmnd[3] << 16) |
1468                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1469         }
1470
1471         memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
1472         io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
1473         io_info.numBlocks = datalength;
1474         io_info.ldTgtId = device_id;
1475         io_request->DataLength = cpu_to_le32(scsi_bufflen(scp));
1476
1477         if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1478                 io_info.isRead = 1;
1479
1480         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
1481
1482         if ((MR_TargetIdToLdGet(device_id, local_map_ptr) >=
1483              MAX_LOGICAL_DRIVES) || (!fusion->fast_path_io)) {
1484                 io_request->RaidContext.regLockFlags  = 0;
1485                 fp_possible = 0;
1486         } else {
1487                 if (MR_BuildRaidContext(instance, &io_info,
1488                                         &io_request->RaidContext,
1489                                         local_map_ptr, &raidLUN))
1490                         fp_possible = io_info.fpOkForIo;
1491         }
1492
1493         /* Use smp_processor_id() for now until cmd->request->cpu is CPU
1494            id by default, not CPU group id, otherwise all MSI-X queues won't
1495            be utilized */
1496         cmd->request_desc->SCSIIO.MSIxIndex = instance->msix_vectors ?
1497                 smp_processor_id() % instance->msix_vectors : 0;
1498
1499         if (fp_possible) {
1500                 megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
1501                                    local_map_ptr, start_lba_lo);
1502                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
1503                 cmd->request_desc->SCSIIO.RequestFlags =
1504                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY
1505                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1506                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1507                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1508                         if (io_request->RaidContext.regLockFlags ==
1509                             REGION_TYPE_UNUSED)
1510                                 cmd->request_desc->SCSIIO.RequestFlags =
1511                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
1512                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1513                         io_request->RaidContext.Type = MPI2_TYPE_CUDA;
1514                         io_request->RaidContext.nseg = 0x1;
1515                         io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
1516                         io_request->RaidContext.regLockFlags |=
1517                           (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
1518                            MR_RL_FLAGS_SEQ_NUM_ENABLE);
1519                 }
1520                 if ((fusion->load_balance_info[device_id].loadBalanceFlag) &&
1521                     (io_info.isRead)) {
1522                         io_info.devHandle =
1523                                 get_updated_dev_handle(
1524                                         &fusion->load_balance_info[device_id],
1525                                         &io_info);
1526                         scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
1527                 } else
1528                         scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
1529                 cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
1530                 io_request->DevHandle = io_info.devHandle;
1531                 /* populate the LUN field */
1532                 memcpy(io_request->LUN, raidLUN, 8);
1533         } else {
1534                 io_request->RaidContext.timeoutValue =
1535                         cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
1536                 cmd->request_desc->SCSIIO.RequestFlags =
1537                         (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
1538                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1539                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1540                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1541                         if (io_request->RaidContext.regLockFlags ==
1542                             REGION_TYPE_UNUSED)
1543                                 cmd->request_desc->SCSIIO.RequestFlags =
1544                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
1545                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1546                         io_request->RaidContext.Type = MPI2_TYPE_CUDA;
1547                         io_request->RaidContext.regLockFlags |=
1548                                 (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
1549                                  MR_RL_FLAGS_SEQ_NUM_ENABLE);
1550                         io_request->RaidContext.nseg = 0x1;
1551                 }
1552                 io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1553                 io_request->DevHandle = cpu_to_le16(device_id);
1554         } /* Not FP */
1555 }
1556
1557 /**
1558  * megasas_build_dcdb_fusion -  Prepares IOs to devices
1559  * @instance:           Adapter soft state
1560  * @scp:                SCSI command
1561  * @cmd:                Command to be prepared
1562  *
1563  * Prepares the io_request frame for non-io cmds
1564  */
1565 static void
1566 megasas_build_dcdb_fusion(struct megasas_instance *instance,
1567                           struct scsi_cmnd *scmd,
1568                           struct megasas_cmd_fusion *cmd)
1569 {
1570         u32 device_id;
1571         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1572         u16 pd_index = 0;
1573         struct MR_FW_RAID_MAP_ALL *local_map_ptr;
1574         struct fusion_context *fusion = instance->ctrl_context;
1575         u8                          span, physArm;
1576         u16                         devHandle;
1577         u32                         ld, arRef, pd;
1578         struct MR_LD_RAID                  *raid;
1579         struct RAID_CONTEXT                *pRAID_Context;
1580
1581         io_request = cmd->io_request;
1582         device_id = MEGASAS_DEV_INDEX(instance, scmd);
1583         pd_index = (scmd->device->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
1584                 +scmd->device->id;
1585         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
1586
1587         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
1588
1589
1590         /* Check if this is a system PD I/O */
1591         if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS &&
1592             instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
1593                 io_request->Function = 0;
1594                 if (fusion->fast_path_io)
1595                         io_request->DevHandle =
1596                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
1597                 io_request->RaidContext.timeoutValue =
1598                         local_map_ptr->raidMap.fpPdIoTimeoutSec;
1599                 io_request->RaidContext.regLockFlags = 0;
1600                 io_request->RaidContext.regLockRowLBA = 0;
1601                 io_request->RaidContext.regLockLength = 0;
1602                 io_request->RaidContext.RAIDFlags =
1603                         MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD <<
1604                         MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
1605                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1606                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
1607                         io_request->IoFlags |=
1608                                 MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH;
1609                 cmd->request_desc->SCSIIO.RequestFlags =
1610                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
1611                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1612                 cmd->request_desc->SCSIIO.DevHandle =
1613                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
1614                 /*
1615                  * If the command is for the tape device, set the
1616                  * FP timeout to the os layer timeout value.
1617                  */
1618                 if (scmd->device->type == TYPE_TAPE) {
1619                         if ((scmd->request->timeout / HZ) > 0xFFFF)
1620                                 io_request->RaidContext.timeoutValue =
1621                                         0xFFFF;
1622                         else
1623                                 io_request->RaidContext.timeoutValue =
1624                                         scmd->request->timeout / HZ;
1625                 }
1626         } else {
1627                 if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS)
1628                         goto NonFastPath;
1629
1630                 ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
1631                 if ((ld >= MAX_LOGICAL_DRIVES) || (!fusion->fast_path_io))
1632                         goto NonFastPath;
1633
1634                 raid = MR_LdRaidGet(ld, local_map_ptr);
1635
1636                 /* check if this LD is FP capable */
1637                 if (!(raid->capability.fpNonRWCapable))
1638                         /* not FP capable, send as non-FP */
1639                         goto NonFastPath;
1640
1641                 /* get RAID_Context pointer */
1642                 pRAID_Context = &io_request->RaidContext;
1643
1644                 /* set RAID context values */
1645                 pRAID_Context->regLockFlags     = REGION_TYPE_SHARED_READ;
1646                 pRAID_Context->timeoutValue     = raid->fpIoTimeoutForLd;
1647                 pRAID_Context->VirtualDiskTgtId = cpu_to_le16(device_id);
1648                 pRAID_Context->regLockRowLBA    = 0;
1649                 pRAID_Context->regLockLength    = 0;
1650                 pRAID_Context->configSeqNum     = raid->seqNum;
1651
1652                 /* get the DevHandle for the PD (since this is
1653                    fpNonRWCapable, this is a single disk RAID0) */
1654                 span = physArm = 0;
1655                 arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
1656                 pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
1657                 devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
1658
1659                 /* build request descriptor */
1660                 cmd->request_desc->SCSIIO.RequestFlags =
1661                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
1662                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1663                 cmd->request_desc->SCSIIO.DevHandle = devHandle;
1664
1665                 /* populate the LUN field */
1666                 memcpy(io_request->LUN, raid->LUN, 8);
1667
1668                 /* build the raidScsiIO structure */
1669                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
1670                 io_request->DevHandle = devHandle;
1671
1672                 return;
1673
1674 NonFastPath:
1675                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1676                 io_request->DevHandle = cpu_to_le16(device_id);
1677                 cmd->request_desc->SCSIIO.RequestFlags =
1678                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
1679                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1680         }
1681         io_request->RaidContext.VirtualDiskTgtId = cpu_to_le16(device_id);
1682         io_request->LUN[1] = scmd->device->lun;
1683 }
1684
1685 /**
1686  * megasas_build_io_fusion -    Prepares IOs to devices
1687  * @instance:           Adapter soft state
1688  * @scp:                SCSI command
1689  * @cmd:                Command to be prepared
1690  *
1691  * Invokes helper functions to prepare request frames
1692  * and sets flags appropriate for IO/Non-IO cmd
1693  */
1694 int
1695 megasas_build_io_fusion(struct megasas_instance *instance,
1696                         struct scsi_cmnd *scp,
1697                         struct megasas_cmd_fusion *cmd)
1698 {
1699         u32 device_id, sge_count;
1700         struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
1701
1702         device_id = MEGASAS_DEV_INDEX(instance, scp);
1703
1704         /* Zero out some fields so they don't get reused */
1705         io_request->LUN[1] = 0;
1706         io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
1707         io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
1708         io_request->EEDPFlags = 0;
1709         io_request->Control = 0;
1710         io_request->EEDPBlockSize = 0;
1711         io_request->ChainOffset = 0;
1712         io_request->RaidContext.RAIDFlags = 0;
1713         io_request->RaidContext.Type = 0;
1714         io_request->RaidContext.nseg = 0;
1715
1716         memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
1717         /*
1718          * Just the CDB length,rest of the Flags are zero
1719          * This will be modified for FP in build_ldio_fusion
1720          */
1721         io_request->IoFlags = cpu_to_le16(scp->cmd_len);
1722
1723         if (megasas_is_ldio(scp))
1724                 megasas_build_ldio_fusion(instance, scp, cmd);
1725         else
1726                 megasas_build_dcdb_fusion(instance, scp, cmd);
1727
1728         /*
1729          * Construct SGL
1730          */
1731
1732         sge_count =
1733                 megasas_make_sgl_fusion(instance, scp,
1734                                         (struct MPI25_IEEE_SGE_CHAIN64 *)
1735                                         &io_request->SGL, cmd);
1736
1737         if (sge_count > instance->max_num_sge) {
1738                 printk(KERN_ERR "megasas: Error. sge_count (0x%x) exceeds "
1739                        "max (0x%x) allowed\n", sge_count,
1740                        instance->max_num_sge);
1741                 return 1;
1742         }
1743
1744         io_request->RaidContext.numSGE = sge_count;
1745
1746         io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING);
1747
1748         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1749                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE);
1750         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1751                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ);
1752
1753         io_request->SGLOffset0 =
1754                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
1755
1756         io_request->SenseBufferLowAddress = cpu_to_le32(cmd->sense_phys_addr);
1757         io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
1758
1759         cmd->scmd = scp;
1760         scp->SCp.ptr = (char *)cmd;
1761
1762         return 0;
1763 }
1764
1765 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
1766 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
1767 {
1768         u8 *p;
1769         struct fusion_context *fusion;
1770
1771         if (index >= instance->max_fw_cmds) {
1772                 printk(KERN_ERR "megasas: Invalid SMID (0x%x)request for "
1773                        "descriptor\n", index);
1774                 return NULL;
1775         }
1776         fusion = instance->ctrl_context;
1777         p = fusion->req_frames_desc
1778                 +sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *index;
1779
1780         return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
1781 }
1782
1783 /**
1784  * megasas_build_and_issue_cmd_fusion -Main routine for building and
1785  *                                     issuing non IOCTL cmd
1786  * @instance:                   Adapter soft state
1787  * @scmd:                       pointer to scsi cmd from OS
1788  */
1789 static u32
1790 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
1791                                    struct scsi_cmnd *scmd)
1792 {
1793         struct megasas_cmd_fusion *cmd;
1794         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1795         u32 index;
1796         struct fusion_context *fusion;
1797
1798         fusion = instance->ctrl_context;
1799
1800         cmd = megasas_get_cmd_fusion(instance);
1801         if (!cmd)
1802                 return SCSI_MLQUEUE_HOST_BUSY;
1803
1804         index = cmd->index;
1805
1806         req_desc = megasas_get_request_descriptor(instance, index-1);
1807         if (!req_desc)
1808                 return 1;
1809
1810         req_desc->Words = 0;
1811         cmd->request_desc = req_desc;
1812
1813         if (megasas_build_io_fusion(instance, scmd, cmd)) {
1814                 megasas_return_cmd_fusion(instance, cmd);
1815                 printk(KERN_ERR "megasas: Error building command.\n");
1816                 cmd->request_desc = NULL;
1817                 return 1;
1818         }
1819
1820         req_desc = cmd->request_desc;
1821         req_desc->SCSIIO.SMID = cpu_to_le16(index);
1822
1823         if (cmd->io_request->ChainOffset != 0 &&
1824             cmd->io_request->ChainOffset != 0xF)
1825                 printk(KERN_ERR "megasas: The chain offset value is not "
1826                        "correct : %x\n", cmd->io_request->ChainOffset);
1827
1828         /*
1829          * Issue the command to the FW
1830          */
1831         atomic_inc(&instance->fw_outstanding);
1832
1833         instance->instancet->fire_cmd(instance,
1834                                       req_desc->u.low, req_desc->u.high,
1835                                       instance->reg_set);
1836
1837         return 0;
1838 }
1839
1840 /**
1841  * complete_cmd_fusion -        Completes command
1842  * @instance:                   Adapter soft state
1843  * Completes all commands that is in reply descriptor queue
1844  */
1845 int
1846 complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
1847 {
1848         union MPI2_REPLY_DESCRIPTORS_UNION *desc;
1849         struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
1850         struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
1851         struct fusion_context *fusion;
1852         struct megasas_cmd *cmd_mfi;
1853         struct megasas_cmd_fusion *cmd_fusion;
1854         u16 smid, num_completed;
1855         u8 reply_descript_type, arm;
1856         u32 status, extStatus, device_id;
1857         union desc_value d_val;
1858         struct LD_LOAD_BALANCE_INFO *lbinfo;
1859
1860         fusion = instance->ctrl_context;
1861
1862         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
1863                 return IRQ_HANDLED;
1864
1865         desc = fusion->reply_frames_desc;
1866         desc += ((MSIxIndex * fusion->reply_alloc_sz)/
1867                  sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)) +
1868                 fusion->last_reply_idx[MSIxIndex];
1869
1870         reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1871
1872         d_val.word = desc->Words;
1873
1874         reply_descript_type = reply_desc->ReplyFlags &
1875                 MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1876
1877         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1878                 return IRQ_NONE;
1879
1880         num_completed = 0;
1881
1882         while ((d_val.u.low != UINT_MAX) && (d_val.u.high != UINT_MAX)) {
1883                 smid = le16_to_cpu(reply_desc->SMID);
1884
1885                 cmd_fusion = fusion->cmd_list[smid - 1];
1886
1887                 scsi_io_req =
1888                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
1889                   cmd_fusion->io_request;
1890
1891                 if (cmd_fusion->scmd)
1892                         cmd_fusion->scmd->SCp.ptr = NULL;
1893
1894                 status = scsi_io_req->RaidContext.status;
1895                 extStatus = scsi_io_req->RaidContext.exStatus;
1896
1897                 switch (scsi_io_req->Function) {
1898                 case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
1899                         /* Update load balancing info */
1900                         device_id = MEGASAS_DEV_INDEX(instance,
1901                                                       cmd_fusion->scmd);
1902                         lbinfo = &fusion->load_balance_info[device_id];
1903                         if (cmd_fusion->scmd->SCp.Status &
1904                             MEGASAS_LOAD_BALANCE_FLAG) {
1905                                 arm = lbinfo->raid1DevHandle[0] ==
1906                                         cmd_fusion->io_request->DevHandle ? 0 :
1907                                         1;
1908                                 atomic_dec(&lbinfo->scsi_pending_cmds[arm]);
1909                                 cmd_fusion->scmd->SCp.Status &=
1910                                         ~MEGASAS_LOAD_BALANCE_FLAG;
1911                         }
1912                         if (reply_descript_type ==
1913                             MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) {
1914                                 if (megasas_dbg_lvl == 5)
1915                                         printk(KERN_ERR "\nmegasas: FAST Path "
1916                                                "IO Success\n");
1917                         }
1918                         /* Fall thru and complete IO */
1919                 case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
1920                         /* Map the FW Cmd Status */
1921                         map_cmd_status(cmd_fusion, status, extStatus);
1922                         scsi_dma_unmap(cmd_fusion->scmd);
1923                         cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
1924                         scsi_io_req->RaidContext.status = 0;
1925                         scsi_io_req->RaidContext.exStatus = 0;
1926                         megasas_return_cmd_fusion(instance, cmd_fusion);
1927                         atomic_dec(&instance->fw_outstanding);
1928
1929                         break;
1930                 case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
1931                         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
1932                         megasas_complete_cmd(instance, cmd_mfi, DID_OK);
1933                         cmd_fusion->flags = 0;
1934                         megasas_return_cmd_fusion(instance, cmd_fusion);
1935
1936                         break;
1937                 }
1938
1939                 fusion->last_reply_idx[MSIxIndex]++;
1940                 if (fusion->last_reply_idx[MSIxIndex] >=
1941                     fusion->reply_q_depth)
1942                         fusion->last_reply_idx[MSIxIndex] = 0;
1943
1944                 desc->Words = ULLONG_MAX;
1945                 num_completed++;
1946
1947                 /* Get the next reply descriptor */
1948                 if (!fusion->last_reply_idx[MSIxIndex])
1949                         desc = fusion->reply_frames_desc +
1950                                 ((MSIxIndex * fusion->reply_alloc_sz)/
1951                                  sizeof(union MPI2_REPLY_DESCRIPTORS_UNION));
1952                 else
1953                         desc++;
1954
1955                 reply_desc =
1956                   (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1957
1958                 d_val.word = desc->Words;
1959
1960                 reply_descript_type = reply_desc->ReplyFlags &
1961                         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1962
1963                 if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1964                         break;
1965         }
1966
1967         if (!num_completed)
1968                 return IRQ_NONE;
1969
1970         wmb();
1971         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1972                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
1973                 writel(((MSIxIndex & 0x7) << 24) |
1974                         fusion->last_reply_idx[MSIxIndex],
1975                         instance->reply_post_host_index_addr[MSIxIndex/8]);
1976         else
1977                 writel((MSIxIndex << 24) |
1978                         fusion->last_reply_idx[MSIxIndex],
1979                         instance->reply_post_host_index_addr[0]);
1980         megasas_check_and_restore_queue_depth(instance);
1981         return IRQ_HANDLED;
1982 }
1983
1984 /**
1985  * megasas_complete_cmd_dpc_fusion -    Completes command
1986  * @instance:                   Adapter soft state
1987  *
1988  * Tasklet to complete cmds
1989  */
1990 void
1991 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
1992 {
1993         struct megasas_instance *instance =
1994                 (struct megasas_instance *)instance_addr;
1995         unsigned long flags;
1996         u32 count, MSIxIndex;
1997
1998         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
1999
2000         /* If we have already declared adapter dead, donot complete cmds */
2001         spin_lock_irqsave(&instance->hba_lock, flags);
2002         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2003                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2004                 return;
2005         }
2006         spin_unlock_irqrestore(&instance->hba_lock, flags);
2007
2008         for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
2009                 complete_cmd_fusion(instance, MSIxIndex);
2010 }
2011
2012 /**
2013  * megasas_isr_fusion - isr entry point
2014  */
2015 irqreturn_t megasas_isr_fusion(int irq, void *devp)
2016 {
2017         struct megasas_irq_context *irq_context = devp;
2018         struct megasas_instance *instance = irq_context->instance;
2019         u32 mfiStatus, fw_state;
2020
2021         if (instance->mask_interrupts)
2022                 return IRQ_NONE;
2023
2024         if (!instance->msix_vectors) {
2025                 mfiStatus = instance->instancet->clear_intr(instance->reg_set);
2026                 if (!mfiStatus)
2027                         return IRQ_NONE;
2028         }
2029
2030         /* If we are resetting, bail */
2031         if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
2032                 instance->instancet->clear_intr(instance->reg_set);
2033                 return IRQ_HANDLED;
2034         }
2035
2036         if (!complete_cmd_fusion(instance, irq_context->MSIxIndex)) {
2037                 instance->instancet->clear_intr(instance->reg_set);
2038                 /* If we didn't complete any commands, check for FW fault */
2039                 fw_state = instance->instancet->read_fw_status_reg(
2040                         instance->reg_set) & MFI_STATE_MASK;
2041                 if (fw_state == MFI_STATE_FAULT)
2042                         schedule_work(&instance->work_init);
2043         }
2044
2045         return IRQ_HANDLED;
2046 }
2047
2048 /**
2049  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
2050  * @instance:                   Adapter soft state
2051  * mfi_cmd:                     megasas_cmd pointer
2052  *
2053  */
2054 u8
2055 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
2056                         struct megasas_cmd *mfi_cmd)
2057 {
2058         struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
2059         struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
2060         struct megasas_cmd_fusion *cmd;
2061         struct fusion_context *fusion;
2062         struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
2063
2064         cmd = megasas_get_cmd_fusion(instance);
2065         if (!cmd)
2066                 return 1;
2067
2068         /*  Save the smid. To be used for returning the cmd */
2069         mfi_cmd->context.smid = cmd->index;
2070
2071         cmd->sync_cmd_idx = mfi_cmd->index;
2072
2073         /*
2074          * For cmds where the flag is set, store the flag and check
2075          * on completion. For cmds with this flag, don't call
2076          * megasas_complete_cmd
2077          */
2078
2079         if (frame_hdr->flags & MFI_FRAME_DONT_POST_IN_REPLY_QUEUE)
2080                 cmd->flags = MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
2081
2082         fusion = instance->ctrl_context;
2083         io_req = cmd->io_request;
2084
2085         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
2086                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
2087                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
2088                         (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
2089                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
2090                 sgl_ptr_end->Flags = 0;
2091         }
2092
2093         mpi25_ieee_chain =
2094           (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
2095
2096         io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
2097         io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
2098                                        SGL) / 4;
2099         io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
2100
2101         mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr);
2102
2103         mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2104                 MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
2105
2106         mpi25_ieee_chain->Length = cpu_to_le32(MEGASAS_MAX_SZ_CHAIN_FRAME);
2107
2108         return 0;
2109 }
2110
2111 /**
2112  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
2113  * @instance:                   Adapter soft state
2114  * @cmd:                        mfi cmd to build
2115  *
2116  */
2117 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
2118 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
2119 {
2120         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2121         u16 index;
2122
2123         if (build_mpt_mfi_pass_thru(instance, cmd)) {
2124                 printk(KERN_ERR "Couldn't build MFI pass thru cmd\n");
2125                 return NULL;
2126         }
2127
2128         index = cmd->context.smid;
2129
2130         req_desc = megasas_get_request_descriptor(instance, index - 1);
2131
2132         if (!req_desc)
2133                 return NULL;
2134
2135         req_desc->Words = 0;
2136         req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
2137                                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2138
2139         req_desc->SCSIIO.SMID = cpu_to_le16(index);
2140
2141         return req_desc;
2142 }
2143
2144 /**
2145  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
2146  * @instance:                   Adapter soft state
2147  * @cmd:                        mfi cmd pointer
2148  *
2149  */
2150 void
2151 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
2152                           struct megasas_cmd *cmd)
2153 {
2154         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2155
2156         req_desc = build_mpt_cmd(instance, cmd);
2157         if (!req_desc) {
2158                 printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
2159                 return;
2160         }
2161         instance->instancet->fire_cmd(instance, req_desc->u.low,
2162                                       req_desc->u.high, instance->reg_set);
2163 }
2164
2165 /**
2166  * megasas_release_fusion -     Reverses the FW initialization
2167  * @intance:                    Adapter soft state
2168  */
2169 void
2170 megasas_release_fusion(struct megasas_instance *instance)
2171 {
2172         megasas_free_cmds(instance);
2173         megasas_free_cmds_fusion(instance);
2174
2175         iounmap(instance->reg_set);
2176
2177         pci_release_selected_regions(instance->pdev, instance->bar);
2178 }
2179
2180 /**
2181  * megasas_read_fw_status_reg_fusion - returns the current FW status value
2182  * @regs:                       MFI register set
2183  */
2184 static u32
2185 megasas_read_fw_status_reg_fusion(struct megasas_register_set __iomem *regs)
2186 {
2187         return readl(&(regs)->outbound_scratch_pad);
2188 }
2189
2190 /**
2191  * megasas_adp_reset_fusion -   For controller reset
2192  * @regs:                               MFI register set
2193  */
2194 static int
2195 megasas_adp_reset_fusion(struct megasas_instance *instance,
2196                          struct megasas_register_set __iomem *regs)
2197 {
2198         return 0;
2199 }
2200
2201 /**
2202  * megasas_check_reset_fusion - For controller reset check
2203  * @regs:                               MFI register set
2204  */
2205 static int
2206 megasas_check_reset_fusion(struct megasas_instance *instance,
2207                            struct megasas_register_set __iomem *regs)
2208 {
2209         return 0;
2210 }
2211
2212 /* This function waits for outstanding commands on fusion to complete */
2213 int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance)
2214 {
2215         int i, outstanding, retval = 0;
2216         u32 fw_state;
2217
2218         for (i = 0; i < resetwaittime; i++) {
2219                 /* Check if firmware is in fault state */
2220                 fw_state = instance->instancet->read_fw_status_reg(
2221                         instance->reg_set) & MFI_STATE_MASK;
2222                 if (fw_state == MFI_STATE_FAULT) {
2223                         printk(KERN_WARNING "megasas: Found FW in FAULT state,"
2224                                " will reset adapter.\n");
2225                         retval = 1;
2226                         goto out;
2227                 }
2228
2229                 outstanding = atomic_read(&instance->fw_outstanding);
2230                 if (!outstanding)
2231                         goto out;
2232
2233                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
2234                         printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
2235                                "commands to complete\n", i, outstanding);
2236                         megasas_complete_cmd_dpc_fusion(
2237                                 (unsigned long)instance);
2238                 }
2239                 msleep(1000);
2240         }
2241
2242         if (atomic_read(&instance->fw_outstanding)) {
2243                 printk("megaraid_sas: pending commands remain after waiting, "
2244                        "will reset adapter.\n");
2245                 retval = 1;
2246         }
2247 out:
2248         return retval;
2249 }
2250
2251 void  megasas_reset_reply_desc(struct megasas_instance *instance)
2252 {
2253         int i, count;
2254         struct fusion_context *fusion;
2255         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
2256
2257         fusion = instance->ctrl_context;
2258         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
2259         for (i = 0 ; i < count ; i++)
2260                 fusion->last_reply_idx[i] = 0;
2261         reply_desc = fusion->reply_frames_desc;
2262         for (i = 0 ; i < fusion->reply_q_depth * count; i++, reply_desc++)
2263                 reply_desc->Words = ULLONG_MAX;
2264 }
2265
2266 /* Core fusion reset function */
2267 int megasas_reset_fusion(struct Scsi_Host *shost)
2268 {
2269         int retval = SUCCESS, i, j, retry = 0;
2270         struct megasas_instance *instance;
2271         struct megasas_cmd_fusion *cmd_fusion;
2272         struct fusion_context *fusion;
2273         struct megasas_cmd *cmd_mfi;
2274         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2275         u32 host_diag, abs_state, status_reg, reset_adapter;
2276
2277         instance = (struct megasas_instance *)shost->hostdata;
2278         fusion = instance->ctrl_context;
2279
2280         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2281                 printk(KERN_WARNING "megaraid_sas: Hardware critical error, "
2282                        "returning FAILED.\n");
2283                 return FAILED;
2284         }
2285
2286         mutex_lock(&instance->reset_mutex);
2287         set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2288         instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
2289         instance->instancet->disable_intr(instance);
2290         msleep(1000);
2291
2292         /* First try waiting for commands to complete */
2293         if (megasas_wait_for_outstanding_fusion(instance)) {
2294                 printk(KERN_WARNING "megaraid_sas: resetting fusion "
2295                        "adapter.\n");
2296                 /* Now return commands back to the OS */
2297                 for (i = 0 ; i < instance->max_fw_cmds; i++) {
2298                         cmd_fusion = fusion->cmd_list[i];
2299                         if (cmd_fusion->scmd) {
2300                                 scsi_dma_unmap(cmd_fusion->scmd);
2301                                 cmd_fusion->scmd->result = (DID_RESET << 16);
2302                                 cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
2303                                 megasas_return_cmd_fusion(instance, cmd_fusion);
2304                                 atomic_dec(&instance->fw_outstanding);
2305                         }
2306                 }
2307
2308                 status_reg = instance->instancet->read_fw_status_reg(
2309                         instance->reg_set);
2310                 abs_state = status_reg & MFI_STATE_MASK;
2311                 reset_adapter = status_reg & MFI_RESET_ADAPTER;
2312                 if (instance->disableOnlineCtrlReset ||
2313                     (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
2314                         /* Reset not supported, kill adapter */
2315                         printk(KERN_WARNING "megaraid_sas: Reset not supported"
2316                                ", killing adapter.\n");
2317                         megaraid_sas_kill_hba(instance);
2318                         instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
2319                         retval = FAILED;
2320                         goto out;
2321                 }
2322
2323                 /* Now try to reset the chip */
2324                 for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
2325                         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE,
2326                                &instance->reg_set->fusion_seq_offset);
2327                         writel(MPI2_WRSEQ_1ST_KEY_VALUE,
2328                                &instance->reg_set->fusion_seq_offset);
2329                         writel(MPI2_WRSEQ_2ND_KEY_VALUE,
2330                                &instance->reg_set->fusion_seq_offset);
2331                         writel(MPI2_WRSEQ_3RD_KEY_VALUE,
2332                                &instance->reg_set->fusion_seq_offset);
2333                         writel(MPI2_WRSEQ_4TH_KEY_VALUE,
2334                                &instance->reg_set->fusion_seq_offset);
2335                         writel(MPI2_WRSEQ_5TH_KEY_VALUE,
2336                                &instance->reg_set->fusion_seq_offset);
2337                         writel(MPI2_WRSEQ_6TH_KEY_VALUE,
2338                                &instance->reg_set->fusion_seq_offset);
2339
2340                         /* Check that the diag write enable (DRWE) bit is on */
2341                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2342                         retry = 0;
2343                         while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
2344                                 msleep(100);
2345                                 host_diag =
2346                                 readl(&instance->reg_set->fusion_host_diag);
2347                                 if (retry++ == 100) {
2348                                         printk(KERN_WARNING "megaraid_sas: "
2349                                                "Host diag unlock failed!\n");
2350                                         break;
2351                                 }
2352                         }
2353                         if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
2354                                 continue;
2355
2356                         /* Send chip reset command */
2357                         writel(host_diag | HOST_DIAG_RESET_ADAPTER,
2358                                &instance->reg_set->fusion_host_diag);
2359                         msleep(3000);
2360
2361                         /* Make sure reset adapter bit is cleared */
2362                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2363                         retry = 0;
2364                         while (host_diag & HOST_DIAG_RESET_ADAPTER) {
2365                                 msleep(100);
2366                                 host_diag =
2367                                 readl(&instance->reg_set->fusion_host_diag);
2368                                 if (retry++ == 1000) {
2369                                         printk(KERN_WARNING "megaraid_sas: "
2370                                                "Diag reset adapter never "
2371                                                "cleared!\n");
2372                                         break;
2373                                 }
2374                         }
2375                         if (host_diag & HOST_DIAG_RESET_ADAPTER)
2376                                 continue;
2377
2378                         abs_state =
2379                                 instance->instancet->read_fw_status_reg(
2380                                         instance->reg_set) & MFI_STATE_MASK;
2381                         retry = 0;
2382
2383                         while ((abs_state <= MFI_STATE_FW_INIT) &&
2384                                (retry++ < 1000)) {
2385                                 msleep(100);
2386                                 abs_state =
2387                                 instance->instancet->read_fw_status_reg(
2388                                         instance->reg_set) & MFI_STATE_MASK;
2389                         }
2390                         if (abs_state <= MFI_STATE_FW_INIT) {
2391                                 printk(KERN_WARNING "megaraid_sas: firmware "
2392                                        "state < MFI_STATE_FW_INIT, state = "
2393                                        "0x%x\n", abs_state);
2394                                 continue;
2395                         }
2396
2397                         /* Wait for FW to become ready */
2398                         if (megasas_transition_to_ready(instance, 1)) {
2399                                 printk(KERN_WARNING "megaraid_sas: Failed to "
2400                                        "transition controller to ready.\n");
2401                                 continue;
2402                         }
2403
2404                         megasas_reset_reply_desc(instance);
2405                         if (megasas_ioc_init_fusion(instance)) {
2406                                 printk(KERN_WARNING "megaraid_sas: "
2407                                        "megasas_ioc_init_fusion() failed!\n");
2408                                 continue;
2409                         }
2410
2411                         clear_bit(MEGASAS_FUSION_IN_RESET,
2412                                   &instance->reset_flags);
2413                         instance->instancet->enable_intr(instance);
2414                         instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2415
2416                         /* Re-fire management commands */
2417                         for (j = 0 ; j < instance->max_fw_cmds; j++) {
2418                                 cmd_fusion = fusion->cmd_list[j];
2419                                 if (cmd_fusion->sync_cmd_idx !=
2420                                     (u32)ULONG_MAX) {
2421                                         cmd_mfi =
2422                                         instance->
2423                                         cmd_list[cmd_fusion->sync_cmd_idx];
2424                                         if (cmd_mfi->frame->dcmd.opcode ==
2425                                             MR_DCMD_LD_MAP_GET_INFO) {
2426                                                 megasas_return_cmd(instance,
2427                                                                    cmd_mfi);
2428                                                 megasas_return_cmd_fusion(
2429                                                         instance, cmd_fusion);
2430                                         } else  {
2431                                                 req_desc =
2432                                                 megasas_get_request_descriptor(
2433                                                         instance,
2434                                                         cmd_mfi->context.smid
2435                                                         -1);
2436                                                 if (!req_desc)
2437                                                         printk(KERN_WARNING
2438                                                                "req_desc NULL"
2439                                                                "\n");
2440                                                 else {
2441                                                         instance->instancet->
2442                                                         fire_cmd(instance,
2443                                                                  req_desc->
2444                                                                  u.low,
2445                                                                  req_desc->
2446                                                                  u.high,
2447                                                                  instance->
2448                                                                  reg_set);
2449                                                 }
2450                                         }
2451                                 }
2452                         }
2453
2454                         /* Reset load balance info */
2455                         memset(fusion->load_balance_info, 0,
2456                                sizeof(struct LD_LOAD_BALANCE_INFO)
2457                                *MAX_LOGICAL_DRIVES);
2458
2459                         if (!megasas_get_map_info(instance))
2460                                 megasas_sync_map_info(instance);
2461
2462                         /* Adapter reset completed successfully */
2463                         printk(KERN_WARNING "megaraid_sas: Reset "
2464                                "successful.\n");
2465                         retval = SUCCESS;
2466                         goto out;
2467                 }
2468                 /* Reset failed, kill the adapter */
2469                 printk(KERN_WARNING "megaraid_sas: Reset failed, killing "
2470                        "adapter.\n");
2471                 megaraid_sas_kill_hba(instance);
2472                 retval = FAILED;
2473         } else {
2474                 clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2475                 instance->instancet->enable_intr(instance);
2476                 instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2477         }
2478 out:
2479         clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2480         mutex_unlock(&instance->reset_mutex);
2481         return retval;
2482 }
2483
2484 /* Fusion OCR work queue */
2485 void megasas_fusion_ocr_wq(struct work_struct *work)
2486 {
2487         struct megasas_instance *instance =
2488                 container_of(work, struct megasas_instance, work_init);
2489
2490         megasas_reset_fusion(instance->host);
2491 }
2492
2493 struct megasas_instance_template megasas_instance_template_fusion = {
2494         .fire_cmd = megasas_fire_cmd_fusion,
2495         .enable_intr = megasas_enable_intr_fusion,
2496         .disable_intr = megasas_disable_intr_fusion,
2497         .clear_intr = megasas_clear_intr_fusion,
2498         .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
2499         .adp_reset = megasas_adp_reset_fusion,
2500         .check_reset = megasas_check_reset_fusion,
2501         .service_isr = megasas_isr_fusion,
2502         .tasklet = megasas_complete_cmd_dpc_fusion,
2503         .init_adapter = megasas_init_adapter_fusion,
2504         .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
2505         .issue_dcmd = megasas_issue_dcmd_fusion,
2506 };