drivers/scsi/megaraid/megaraid_sas_fusion.c

   1 /*
   2  *  Linux MegaRAID driver for SAS based RAID controllers
   3  *
   4  *  Copyright (c) 2009-2013  LSI Corporation
   5  *  Copyright (c) 2013-2014  Avago Technologies
   6  *
   7  *  This program is free software; you can redistribute it and/or
   8  *  modify it under the terms of the GNU General Public License
   9  *  as published by the Free Software Foundation; either version 2
  10  *  of the License, or (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  *
  20  *  FILE: megaraid_sas_fusion.c
  21  *
  22  *  Authors: Avago Technologies
  23  *           Sumant Patro
  24  *           Adam Radford
  25  *           Kashyap Desai <kashyap.desai@avagotech.com>
  26  *           Sumit Saxena <sumit.saxena@avagotech.com>
  27  *
  28  *  Send feedback to: megaraidlinux.pdl@avagotech.com
  29  *
  30  *  Mail to: Avago Technologies, 350 West Trimble Road, Building 90,
  31  *  San Jose, California 95131
  32  */
  33
  34 #include <linux/kernel.h>
  35 #include <linux/types.h>
  36 #include <linux/pci.h>
  37 #include <linux/list.h>
  38 #include <linux/moduleparam.h>
  39 #include <linux/module.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/delay.h>
  43 #include <linux/uio.h>
  44 #include <linux/uaccess.h>
  45 #include <linux/fs.h>
  46 #include <linux/compat.h>
  47 #include <linux/blkdev.h>
  48 #include <linux/mutex.h>
  49 #include <linux/poll.h>
  50
  51 #include <scsi/scsi.h>
  52 #include <scsi/scsi_cmnd.h>
  53 #include <scsi/scsi_device.h>
  54 #include <scsi/scsi_host.h>
  55 #include <scsi/scsi_dbg.h>
  56
  57 #include "megaraid_sas_fusion.h"
  58 #include "megaraid_sas.h"
  59
  60 extern void megasas_free_cmds(struct megasas_instance *instance);
  61 extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
  62                                            *instance);
  63 extern void
  64 megasas_complete_cmd(struct megasas_instance *instance,
  65                      struct megasas_cmd *cmd, u8 alt_status);
  66 int
  67 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
  68               int seconds);
  69
  70 void
  71 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
  72 int megasas_alloc_cmds(struct megasas_instance *instance);
  73 int
  74 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs);
  75 int
  76 megasas_issue_polled(struct megasas_instance *instance,
  77                      struct megasas_cmd *cmd);
  78 void
  79 megasas_check_and_restore_queue_depth(struct megasas_instance *instance);
  80
  81 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
  82 void megaraid_sas_kill_hba(struct megasas_instance *instance);
  83
  84 extern u32 megasas_dbg_lvl;
  85 void megasas_sriov_heartbeat_handler(unsigned long instance_addr);
  86 int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
  87                                   int initial);
  88 void megasas_start_timer(struct megasas_instance *instance,
  89                         struct timer_list *timer,
  90                          void *fn, unsigned long interval);
  91 extern struct megasas_mgmt_info megasas_mgmt_info;
  92 extern int resetwaittime;
  93
  94
  95
  96 /**
  97  * megasas_enable_intr_fusion - Enables interrupts
  98  * @regs:                       MFI register set
  99  */
 100 void
 101 megasas_enable_intr_fusion(struct megasas_instance *instance)
 102 {
 103         struct megasas_register_set __iomem *regs;
 104         regs = instance->reg_set;
 105
 106         instance->mask_interrupts = 0;
 107         /* For Thunderbolt/Invader also clear intr on enable */
 108         writel(~0, &regs->outbound_intr_status);
 109         readl(&regs->outbound_intr_status);
 110
 111         writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 112
 113         /* Dummy readl to force pci flush */
 114         readl(&regs->outbound_intr_mask);
 115 }
 116
 117 /**
 118  * megasas_disable_intr_fusion - Disables interrupt
 119  * @regs:                        MFI register set
 120  */
 121 void
 122 megasas_disable_intr_fusion(struct megasas_instance *instance)
 123 {
 124         u32 mask = 0xFFFFFFFF;
 125         u32 status;
 126         struct megasas_register_set __iomem *regs;
 127         regs = instance->reg_set;
 128         instance->mask_interrupts = 1;
 129
 130         writel(mask, &regs->outbound_intr_mask);
 131         /* Dummy readl to force pci flush */
 132         status = readl(&regs->outbound_intr_mask);
 133 }
 134
 135 int
 136 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs)
 137 {
 138         u32 status;
 139         /*
 140          * Check if it is our interrupt
 141          */
 142         status = readl(&regs->outbound_intr_status);
 143
 144         if (status & 1) {
 145                 writel(status, &regs->outbound_intr_status);
 146                 readl(&regs->outbound_intr_status);
 147                 return 1;
 148         }
 149         if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
 150                 return 0;
 151
 152         return 1;
 153 }
 154
 155 /**
 156  * megasas_get_cmd_fusion -     Get a command from the free pool
 157  * @instance:           Adapter soft state
 158  *
 159  * Returns a free command from the pool
 160  */
 161 struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 162                                                   *instance)
 163 {
 164         unsigned long flags;
 165         struct fusion_context *fusion =
 166                 (struct fusion_context *)instance->ctrl_context;
 167         struct megasas_cmd_fusion *cmd = NULL;
 168
 169         spin_lock_irqsave(&fusion->mpt_pool_lock, flags);
 170
 171         if (!list_empty(&fusion->cmd_pool)) {
 172                 cmd = list_entry((&fusion->cmd_pool)->next,
 173                                  struct megasas_cmd_fusion, list);
 174                 list_del_init(&cmd->list);
 175         } else {
 176                 printk(KERN_ERR "megasas: Command pool (fusion) empty!\n");
 177         }
 178
 179         spin_unlock_irqrestore(&fusion->mpt_pool_lock, flags);
 180         return cmd;
 181 }
 182
 183 /**
 184  * megasas_return_cmd_fusion -  Return a cmd to free command pool
 185  * @instance:           Adapter soft state
 186  * @cmd:                Command packet to be returned to free command pool
 187  */
 188 inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
 189         struct megasas_cmd_fusion *cmd)
 190 {
 191         unsigned long flags;
 192         struct fusion_context *fusion =
 193                 (struct fusion_context *)instance->ctrl_context;
 194
 195         spin_lock_irqsave(&fusion->mpt_pool_lock, flags);
 196
 197         cmd->scmd = NULL;
 198         cmd->sync_cmd_idx = (u32)ULONG_MAX;
 199         memset(cmd->io_request, 0, sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 200         list_add(&cmd->list, (&fusion->cmd_pool)->next);
 201
 202         spin_unlock_irqrestore(&fusion->mpt_pool_lock, flags);
 203 }
 204
 205 /**
 206  * megasas_return_mfi_mpt_pthr - Return a mfi and mpt to free command pool
 207  * @instance:           Adapter soft state
 208  * @cmd_mfi:            MFI Command packet to be returned to free command pool
 209  * @cmd_mpt:            MPT Command packet to be returned to free command pool
 210  */
 211 inline void megasas_return_mfi_mpt_pthr(struct megasas_instance *instance,
 212                 struct megasas_cmd *cmd_mfi,
 213                 struct megasas_cmd_fusion *cmd_fusion)
 214 {
 215         unsigned long flags;
 216
 217         /*
 218          * TO DO: optimize this code and use only one lock instead of two
 219          * locks being used currently- mpt_pool_lock is acquired
 220          * inside mfi_pool_lock
 221          */
 222         spin_lock_irqsave(&instance->mfi_pool_lock, flags);
 223         megasas_return_cmd_fusion(instance, cmd_fusion);
 224         if (atomic_read(&cmd_mfi->mfi_mpt_pthr) != MFI_MPT_ATTACHED)
 225                 dev_err(&instance->pdev->dev, "Possible bug from %s %d\n",
 226                         __func__, __LINE__);
 227         atomic_set(&cmd_mfi->mfi_mpt_pthr, MFI_MPT_DETACHED);
 228         __megasas_return_cmd(instance, cmd_mfi);
 229         spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
 230 }
 231
 232 /**
 233  * megasas_teardown_frame_pool_fusion - Destroy the cmd frame DMA pool
 234  * @instance:                           Adapter soft state
 235  */
 236 static void megasas_teardown_frame_pool_fusion(
 237         struct megasas_instance *instance)
 238 {
 239         int i;
 240         struct fusion_context *fusion = instance->ctrl_context;
 241
 242         u16 max_cmd = instance->max_fw_cmds;
 243
 244         struct megasas_cmd_fusion *cmd;
 245
 246         if (!fusion->sg_dma_pool || !fusion->sense_dma_pool) {
 247                 printk(KERN_ERR "megasas: dma pool is null. SG Pool %p, "
 248                        "sense pool : %p\n", fusion->sg_dma_pool,
 249                        fusion->sense_dma_pool);
 250                 return;
 251         }
 252
 253         /*
 254          * Return all frames to pool
 255          */
 256         for (i = 0; i < max_cmd; i++) {
 257
 258                 cmd = fusion->cmd_list[i];
 259
 260                 if (cmd->sg_frame)
 261                         pci_pool_free(fusion->sg_dma_pool, cmd->sg_frame,
 262                                       cmd->sg_frame_phys_addr);
 263
 264                 if (cmd->sense)
 265                         pci_pool_free(fusion->sense_dma_pool, cmd->sense,
 266                                       cmd->sense_phys_addr);
 267         }
 268
 269         /*
 270          * Now destroy the pool itself
 271          */
 272         pci_pool_destroy(fusion->sg_dma_pool);
 273         pci_pool_destroy(fusion->sense_dma_pool);
 274
 275         fusion->sg_dma_pool = NULL;
 276         fusion->sense_dma_pool = NULL;
 277 }
 278
 279 /**
 280  * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
 281  * @instance:           Adapter soft state
 282  */
 283 void
 284 megasas_free_cmds_fusion(struct megasas_instance *instance)
 285 {
 286         int i;
 287         struct fusion_context *fusion = instance->ctrl_context;
 288
 289         u32 max_cmds, req_sz, reply_sz, io_frames_sz;
 290
 291
 292         req_sz = fusion->request_alloc_sz;
 293         reply_sz = fusion->reply_alloc_sz;
 294         io_frames_sz = fusion->io_frames_alloc_sz;
 295
 296         max_cmds = instance->max_fw_cmds;
 297
 298         /* Free descriptors and request Frames memory */
 299         if (fusion->req_frames_desc)
 300                 dma_free_coherent(&instance->pdev->dev, req_sz,
 301                                   fusion->req_frames_desc,
 302                                   fusion->req_frames_desc_phys);
 303
 304         if (fusion->reply_frames_desc) {
 305                 pci_pool_free(fusion->reply_frames_desc_pool,
 306                               fusion->reply_frames_desc,
 307                               fusion->reply_frames_desc_phys);
 308                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 309         }
 310
 311         if (fusion->io_request_frames) {
 312                 pci_pool_free(fusion->io_request_frames_pool,
 313                               fusion->io_request_frames,
 314                               fusion->io_request_frames_phys);
 315                 pci_pool_destroy(fusion->io_request_frames_pool);
 316         }
 317
 318         /* Free the Fusion frame pool */
 319         megasas_teardown_frame_pool_fusion(instance);
 320
 321         /* Free all the commands in the cmd_list */
 322         for (i = 0; i < max_cmds; i++)
 323                 kfree(fusion->cmd_list[i]);
 324
 325         /* Free the cmd_list buffer itself */
 326         kfree(fusion->cmd_list);
 327         fusion->cmd_list = NULL;
 328
 329         INIT_LIST_HEAD(&fusion->cmd_pool);
 330 }
 331
 332 /**
 333  * megasas_create_frame_pool_fusion -   Creates DMA pool for cmd frames
 334  * @instance:                   Adapter soft state
 335  *
 336  */
 337 static int megasas_create_frame_pool_fusion(struct megasas_instance *instance)
 338 {
 339         int i;
 340         u32 max_cmd;
 341         struct fusion_context *fusion;
 342         struct megasas_cmd_fusion *cmd;
 343         u32 total_sz_chain_frame;
 344
 345         fusion = instance->ctrl_context;
 346         max_cmd = instance->max_fw_cmds;
 347
 348         total_sz_chain_frame = MEGASAS_MAX_SZ_CHAIN_FRAME;
 349
 350         /*
 351          * Use DMA pool facility provided by PCI layer
 352          */
 353
 354         fusion->sg_dma_pool = pci_pool_create("megasas sg pool fusion",
 355                                               instance->pdev,
 356                                               total_sz_chain_frame, 4,
 357                                               0);
 358         if (!fusion->sg_dma_pool) {
 359                 printk(KERN_DEBUG "megasas: failed to setup request pool "
 360                        "fusion\n");
 361                 return -ENOMEM;
 362         }
 363         fusion->sense_dma_pool = pci_pool_create("megasas sense pool fusion",
 364                                                  instance->pdev,
 365                                                  SCSI_SENSE_BUFFERSIZE, 64, 0);
 366
 367         if (!fusion->sense_dma_pool) {
 368                 printk(KERN_DEBUG "megasas: failed to setup sense pool "
 369                        "fusion\n");
 370                 pci_pool_destroy(fusion->sg_dma_pool);
 371                 fusion->sg_dma_pool = NULL;
 372                 return -ENOMEM;
 373         }
 374
 375         /*
 376          * Allocate and attach a frame to each of the commands in cmd_list
 377          */
 378         for (i = 0; i < max_cmd; i++) {
 379
 380                 cmd = fusion->cmd_list[i];
 381
 382                 cmd->sg_frame = pci_pool_alloc(fusion->sg_dma_pool,
 383                                                GFP_KERNEL,
 384                                                &cmd->sg_frame_phys_addr);
 385
 386                 cmd->sense = pci_pool_alloc(fusion->sense_dma_pool,
 387                                             GFP_KERNEL, &cmd->sense_phys_addr);
 388                 /*
 389                  * megasas_teardown_frame_pool_fusion() takes care of freeing
 390                  * whatever has been allocated
 391                  */
 392                 if (!cmd->sg_frame || !cmd->sense) {
 393                         printk(KERN_DEBUG "megasas: pci_pool_alloc failed\n");
 394                         megasas_teardown_frame_pool_fusion(instance);
 395                         return -ENOMEM;
 396                 }
 397         }
 398         return 0;
 399 }
 400
 401 /**
 402  * megasas_alloc_cmds_fusion -  Allocates the command packets
 403  * @instance:           Adapter soft state
 404  *
 405  *
 406  * Each frame has a 32-bit field called context. This context is used to get
 407  * back the megasas_cmd_fusion from the frame when a frame gets completed
 408  * In this driver, the 32 bit values are the indices into an array cmd_list.
 409  * This array is used only to look up the megasas_cmd_fusion given the context.
 410  * The free commands themselves are maintained in a linked list called cmd_pool.
 411  *
 412  * cmds are formed in the io_request and sg_frame members of the
 413  * megasas_cmd_fusion. The context field is used to get a request descriptor
 414  * and is used as SMID of the cmd.
 415  * SMID value range is from 1 to max_fw_cmds.
 416  */
 417 int
 418 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 419 {
 420         int i, j, count;
 421         u32 max_cmd, io_frames_sz;
 422         struct fusion_context *fusion;
 423         struct megasas_cmd_fusion *cmd;
 424         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 425         u32 offset;
 426         dma_addr_t io_req_base_phys;
 427         u8 *io_req_base;
 428
 429         fusion = instance->ctrl_context;
 430
 431         max_cmd = instance->max_fw_cmds;
 432
 433         fusion->req_frames_desc =
 434                 dma_alloc_coherent(&instance->pdev->dev,
 435                                    fusion->request_alloc_sz,
 436                                    &fusion->req_frames_desc_phys, GFP_KERNEL);
 437
 438         if (!fusion->req_frames_desc) {
 439                 printk(KERN_ERR "megasas; Could not allocate memory for "
 440                        "request_frames\n");
 441                 goto fail_req_desc;
 442         }
 443
 444         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 445         fusion->reply_frames_desc_pool =
 446                 pci_pool_create("reply_frames pool", instance->pdev,
 447                                 fusion->reply_alloc_sz * count, 16, 0);
 448
 449         if (!fusion->reply_frames_desc_pool) {
 450                 printk(KERN_ERR "megasas; Could not allocate memory for "
 451                        "reply_frame pool\n");
 452                 goto fail_reply_desc;
 453         }
 454
 455         fusion->reply_frames_desc =
 456                 pci_pool_alloc(fusion->reply_frames_desc_pool, GFP_KERNEL,
 457                                &fusion->reply_frames_desc_phys);
 458         if (!fusion->reply_frames_desc) {
 459                 printk(KERN_ERR "megasas; Could not allocate memory for "
 460                        "reply_frame pool\n");
 461                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 462                 goto fail_reply_desc;
 463         }
 464
 465         reply_desc = fusion->reply_frames_desc;
 466         for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
 467                 reply_desc->Words = ULLONG_MAX;
 468
 469         io_frames_sz = fusion->io_frames_alloc_sz;
 470
 471         fusion->io_request_frames_pool =
 472                 pci_pool_create("io_request_frames pool", instance->pdev,
 473                                 fusion->io_frames_alloc_sz, 16, 0);
 474
 475         if (!fusion->io_request_frames_pool) {
 476                 printk(KERN_ERR "megasas: Could not allocate memory for "
 477                        "io_request_frame pool\n");
 478                 goto fail_io_frames;
 479         }
 480
 481         fusion->io_request_frames =
 482                 pci_pool_alloc(fusion->io_request_frames_pool, GFP_KERNEL,
 483                                &fusion->io_request_frames_phys);
 484         if (!fusion->io_request_frames) {
 485                 printk(KERN_ERR "megasas: Could not allocate memory for "
 486                        "io_request_frames frames\n");
 487                 pci_pool_destroy(fusion->io_request_frames_pool);
 488                 goto fail_io_frames;
 489         }
 490
 491         /*
 492          * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
 493          * Allocate the dynamic array first and then allocate individual
 494          * commands.
 495          */
 496         fusion->cmd_list = kzalloc(sizeof(struct megasas_cmd_fusion *)
 497                                    * max_cmd, GFP_KERNEL);
 498
 499         if (!fusion->cmd_list) {
 500                 printk(KERN_DEBUG "megasas: out of memory. Could not alloc "
 501                        "memory for cmd_list_fusion\n");
 502                 goto fail_cmd_list;
 503         }
 504
 505         max_cmd = instance->max_fw_cmds;
 506         for (i = 0; i < max_cmd; i++) {
 507                 fusion->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd_fusion),
 508                                               GFP_KERNEL);
 509                 if (!fusion->cmd_list[i]) {
 510                         printk(KERN_ERR "Could not alloc cmd list fusion\n");
 511
 512                         for (j = 0; j < i; j++)
 513                                 kfree(fusion->cmd_list[j]);
 514
 515                         kfree(fusion->cmd_list);
 516                         fusion->cmd_list = NULL;
 517                         goto fail_cmd_list;
 518                 }
 519         }
 520
 521         /* The first 256 bytes (SMID 0) is not used. Don't add to cmd list */
 522         io_req_base = fusion->io_request_frames +
 523                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 524         io_req_base_phys = fusion->io_request_frames_phys +
 525                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 526
 527         /*
 528          * Add all the commands to command pool (fusion->cmd_pool)
 529          */
 530
 531         /* SMID 0 is reserved. Set SMID/index from 1 */
 532         for (i = 0; i < max_cmd; i++) {
 533                 cmd = fusion->cmd_list[i];
 534                 offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
 535                 memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 536                 cmd->index = i + 1;
 537                 cmd->scmd = NULL;
 538                 cmd->sync_cmd_idx = (u32)ULONG_MAX; /* Set to Invalid */
 539                 cmd->instance = instance;
 540                 cmd->io_request =
 541                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
 542                   (io_req_base + offset);
 543                 memset(cmd->io_request, 0,
 544                        sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 545                 cmd->io_request_phys_addr = io_req_base_phys + offset;
 546
 547                 list_add_tail(&cmd->list, &fusion->cmd_pool);
 548         }
 549
 550         /*
 551          * Create a frame pool and assign one frame to each cmd
 552          */
 553         if (megasas_create_frame_pool_fusion(instance)) {
 554                 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
 555                 megasas_free_cmds_fusion(instance);
 556                 goto fail_req_desc;
 557         }
 558
 559         return 0;
 560
 561 fail_cmd_list:
 562         pci_pool_free(fusion->io_request_frames_pool, fusion->io_request_frames,
 563                       fusion->io_request_frames_phys);
 564         pci_pool_destroy(fusion->io_request_frames_pool);
 565 fail_io_frames:
 566         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 567                           fusion->reply_frames_desc,
 568                           fusion->reply_frames_desc_phys);
 569         pci_pool_free(fusion->reply_frames_desc_pool,
 570                       fusion->reply_frames_desc,
 571                       fusion->reply_frames_desc_phys);
 572         pci_pool_destroy(fusion->reply_frames_desc_pool);
 573
 574 fail_reply_desc:
 575         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 576                           fusion->req_frames_desc,
 577                           fusion->req_frames_desc_phys);
 578 fail_req_desc:
 579         return -ENOMEM;
 580 }
 581
 582 /**
 583  * wait_and_poll -      Issues a polling command
 584  * @instance:                   Adapter soft state
 585  * @cmd:                        Command packet to be issued
 586  *
 587  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
 588  */
 589 int
 590 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
 591         int seconds)
 592 {
 593         int i;
 594         struct megasas_header *frame_hdr = &cmd->frame->hdr;
 595         struct fusion_context *fusion;
 596
 597         u32 msecs = seconds * 1000;
 598
 599         fusion = instance->ctrl_context;
 600         /*
 601          * Wait for cmd_status to change
 602          */
 603         for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
 604                 rmb();
 605                 msleep(20);
 606         }
 607
 608         if (frame_hdr->cmd_status == 0xff) {
 609                 if (fusion)
 610                         megasas_return_mfi_mpt_pthr(instance, cmd,
 611                                 cmd->mpt_pthr_cmd_blocked);
 612                 return -ETIME;
 613         }
 614
 615         return 0;
 616 }
 617
 618 /**
 619  * megasas_ioc_init_fusion -    Initializes the FW
 620  * @instance:           Adapter soft state
 621  *
 622  * Issues the IOC Init cmd
 623  */
 624 int
 625 megasas_ioc_init_fusion(struct megasas_instance *instance)
 626 {
 627         struct megasas_init_frame *init_frame;
 628         struct MPI2_IOC_INIT_REQUEST *IOCInitMessage;
 629         dma_addr_t      ioc_init_handle;
 630         struct megasas_cmd *cmd;
 631         u8 ret;
 632         struct fusion_context *fusion;
 633         union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
 634         int i;
 635         struct megasas_header *frame_hdr;
 636
 637         fusion = instance->ctrl_context;
 638
 639         cmd = megasas_get_cmd(instance);
 640
 641         if (!cmd) {
 642                 printk(KERN_ERR "Could not allocate cmd for INIT Frame\n");
 643                 ret = 1;
 644                 goto fail_get_cmd;
 645         }
 646
 647         IOCInitMessage =
 648           dma_alloc_coherent(&instance->pdev->dev,
 649                              sizeof(struct MPI2_IOC_INIT_REQUEST),
 650                              &ioc_init_handle, GFP_KERNEL);
 651
 652         if (!IOCInitMessage) {
 653                 printk(KERN_ERR "Could not allocate memory for "
 654                        "IOCInitMessage\n");
 655                 ret = 1;
 656                 goto fail_fw_init;
 657         }
 658
 659         memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
 660
 661         IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
 662         IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
 663         IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION);
 664         IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
 665         IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4);
 666
 667         IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth);
 668         IOCInitMessage->ReplyDescriptorPostQueueAddress = cpu_to_le64(fusion->reply_frames_desc_phys);
 669         IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys);
 670         IOCInitMessage->HostMSIxVectors = instance->msix_vectors;
 671         init_frame = (struct megasas_init_frame *)cmd->frame;
 672         memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
 673
 674         frame_hdr = &cmd->frame->hdr;
 675         frame_hdr->cmd_status = 0xFF;
 676         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
 677
 678         init_frame->cmd = MFI_CMD_INIT;
 679         init_frame->cmd_status = 0xFF;
 680
 681         /* driver support Extended MSIX */
 682         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
 683                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
 684                 init_frame->driver_operations.
 685                         mfi_capabilities.support_additional_msix = 1;
 686         /* driver supports HA / Remote LUN over Fast Path interface */
 687         init_frame->driver_operations.mfi_capabilities.support_fp_remote_lun
 688                 = 1;
 689         init_frame->driver_operations.mfi_capabilities.support_max_255lds
 690                 = 1;
 691         init_frame->driver_operations.mfi_capabilities.support_ndrive_r1_lb
 692                 = 1;
 693         init_frame->driver_operations.mfi_capabilities.security_protocol_cmds_fw
 694                 = 1;
 695         /* Convert capability to LE32 */
 696         cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
 697
 698         init_frame->queue_info_new_phys_addr_hi =
 699                 cpu_to_le32(upper_32_bits(ioc_init_handle));
 700         init_frame->queue_info_new_phys_addr_lo =
 701                 cpu_to_le32(lower_32_bits(ioc_init_handle));
 702         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
 703
 704         req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr));
 705         req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr));
 706         req_desc.MFAIo.RequestFlags =
 707                 (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
 708                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 709
 710         /*
 711          * disable the intr before firing the init frame
 712          */
 713         instance->instancet->disable_intr(instance);
 714
 715         for (i = 0; i < (10 * 1000); i += 20) {
 716                 if (readl(&instance->reg_set->doorbell) & 1)
 717                         msleep(20);
 718                 else
 719                         break;
 720         }
 721
 722         instance->instancet->fire_cmd(instance, req_desc.u.low,
 723                                       req_desc.u.high, instance->reg_set);
 724
 725         wait_and_poll(instance, cmd, MFI_POLL_TIMEOUT_SECS);
 726
 727         frame_hdr = &cmd->frame->hdr;
 728         if (frame_hdr->cmd_status != 0) {
 729                 ret = 1;
 730                 goto fail_fw_init;
 731         }
 732         printk(KERN_ERR "megasas:IOC Init cmd success\n");
 733
 734         ret = 0;
 735
 736 fail_fw_init:
 737         megasas_return_cmd(instance, cmd);
 738         if (IOCInitMessage)
 739                 dma_free_coherent(&instance->pdev->dev,
 740                                   sizeof(struct MPI2_IOC_INIT_REQUEST),
 741                                   IOCInitMessage, ioc_init_handle);
 742 fail_get_cmd:
 743         return ret;
 744 }
 745
 746 /*
 747  * megasas_get_ld_map_info -    Returns FW's ld_map structure
 748  * @instance:                           Adapter soft state
 749  * @pend:                               Pend the command or not
 750  * Issues an internal command (DCMD) to get the FW's controller PD
 751  * list structure.  This information is mainly used to find out SYSTEM
 752  * supported by the FW.
 753  * dcmd.mbox value setting for MR_DCMD_LD_MAP_GET_INFO
 754  * dcmd.mbox.b[0]       - number of LDs being sync'd
 755  * dcmd.mbox.b[1]       - 0 - complete command immediately.
 756  *                      - 1 - pend till config change
 757  * dcmd.mbox.b[2]       - 0 - supports max 64 lds and uses legacy MR_FW_RAID_MAP
 758  *                      - 1 - supports max MAX_LOGICAL_DRIVES_EXT lds and
 759  *                              uses extended struct MR_FW_RAID_MAP_EXT
 760  */
 761 static int
 762 megasas_get_ld_map_info(struct megasas_instance *instance)
 763 {
 764         int ret = 0;
 765         struct megasas_cmd *cmd;
 766         struct megasas_dcmd_frame *dcmd;
 767         void *ci;
 768         dma_addr_t ci_h = 0;
 769         u32 size_map_info;
 770         struct fusion_context *fusion;
 771
 772         cmd = megasas_get_cmd(instance);
 773
 774         if (!cmd) {
 775                 printk(KERN_DEBUG "megasas: Failed to get cmd for map info.\n");
 776                 return -ENOMEM;
 777         }
 778
 779         fusion = instance->ctrl_context;
 780
 781         if (!fusion) {
 782                 megasas_return_cmd(instance, cmd);
 783                 return -ENXIO;
 784         }
 785
 786         dcmd = &cmd->frame->dcmd;
 787
 788         size_map_info = fusion->current_map_sz;
 789
 790         ci = (void *) fusion->ld_map[(instance->map_id & 1)];
 791         ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
 792
 793         if (!ci) {
 794                 printk(KERN_DEBUG "Failed to alloc mem for ld_map_info\n");
 795                 megasas_return_cmd(instance, cmd);
 796                 return -ENOMEM;
 797         }
 798
 799         memset(ci, 0, fusion->max_map_sz);
 800         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 801 #if VD_EXT_DEBUG
 802         dev_dbg(&instance->pdev->dev,
 803                 "%s sending MR_DCMD_LD_MAP_GET_INFO with size %d\n",
 804                 __func__, cpu_to_le32(size_map_info));
 805 #endif
 806         dcmd->cmd = MFI_CMD_DCMD;
 807         dcmd->cmd_status = 0xFF;
 808         dcmd->sge_count = 1;
 809         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
 810         dcmd->timeout = 0;
 811         dcmd->pad_0 = 0;
 812         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
 813         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
 814         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
 815         dcmd->sgl.sge32[0].length = cpu_to_le32(size_map_info);
 816
 817         if (instance->ctrl_context && !instance->mask_interrupts)
 818                 ret = megasas_issue_blocked_cmd(instance, cmd,
 819                         MEGASAS_BLOCKED_CMD_TIMEOUT);
 820         else
 821                 ret = megasas_issue_polled(instance, cmd);
 822
 823         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
 824                 megasas_return_mfi_mpt_pthr(instance, cmd,
 825                         cmd->mpt_pthr_cmd_blocked);
 826         else
 827                 megasas_return_cmd(instance, cmd);
 828
 829         return ret;
 830 }
 831
 832 u8
 833 megasas_get_map_info(struct megasas_instance *instance)
 834 {
 835         struct fusion_context *fusion = instance->ctrl_context;
 836
 837         fusion->fast_path_io = 0;
 838         if (!megasas_get_ld_map_info(instance)) {
 839                 if (MR_ValidateMapInfo(instance)) {
 840                         fusion->fast_path_io = 1;
 841                         return 0;
 842                 }
 843         }
 844         return 1;
 845 }
 846
 847 /*
 848  * megasas_sync_map_info -      Returns FW's ld_map structure
 849  * @instance:                           Adapter soft state
 850  *
 851  * Issues an internal command (DCMD) to get the FW's controller PD
 852  * list structure.  This information is mainly used to find out SYSTEM
 853  * supported by the FW.
 854  */
 855 int
 856 megasas_sync_map_info(struct megasas_instance *instance)
 857 {
 858         int ret = 0, i;
 859         struct megasas_cmd *cmd;
 860         struct megasas_dcmd_frame *dcmd;
 861         u32 size_sync_info, num_lds;
 862         struct fusion_context *fusion;
 863         struct MR_LD_TARGET_SYNC *ci = NULL;
 864         struct MR_DRV_RAID_MAP_ALL *map;
 865         struct MR_LD_RAID  *raid;
 866         struct MR_LD_TARGET_SYNC *ld_sync;
 867         dma_addr_t ci_h = 0;
 868         u32 size_map_info;
 869
 870         cmd = megasas_get_cmd(instance);
 871
 872         if (!cmd) {
 873                 printk(KERN_DEBUG "megasas: Failed to get cmd for sync"
 874                        "info.\n");
 875                 return -ENOMEM;
 876         }
 877
 878         fusion = instance->ctrl_context;
 879
 880         if (!fusion) {
 881                 megasas_return_cmd(instance, cmd);
 882                 return 1;
 883         }
 884
 885         map = fusion->ld_drv_map[instance->map_id & 1];
 886
 887         num_lds = le16_to_cpu(map->raidMap.ldCount);
 888
 889         dcmd = &cmd->frame->dcmd;
 890
 891         size_sync_info = sizeof(struct MR_LD_TARGET_SYNC) *num_lds;
 892
 893         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 894
 895         ci = (struct MR_LD_TARGET_SYNC *)
 896           fusion->ld_map[(instance->map_id - 1) & 1];
 897         memset(ci, 0, fusion->max_map_sz);
 898
 899         ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
 900
 901         ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
 902
 903         for (i = 0; i < num_lds; i++, ld_sync++) {
 904                 raid = MR_LdRaidGet(i, map);
 905                 ld_sync->targetId = MR_GetLDTgtId(i, map);
 906                 ld_sync->seqNum = raid->seqNum;
 907         }
 908
 909         size_map_info = fusion->current_map_sz;
 910
 911         dcmd->cmd = MFI_CMD_DCMD;
 912         dcmd->cmd_status = 0xFF;
 913         dcmd->sge_count = 1;
 914         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_WRITE);
 915         dcmd->timeout = 0;
 916         dcmd->pad_0 = 0;
 917         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
 918         dcmd->mbox.b[0] = num_lds;
 919         dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
 920         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
 921         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
 922         dcmd->sgl.sge32[0].length = cpu_to_le32(size_map_info);
 923
 924         instance->map_update_cmd = cmd;
 925
 926         instance->instancet->issue_dcmd(instance, cmd);
 927
 928         return ret;
 929 }
 930
 931 /*
 932  * meagasas_display_intel_branding - Display branding string
 933  * @instance: per adapter object
 934  *
 935  * Return nothing.
 936  */
 937 static void
 938 megasas_display_intel_branding(struct megasas_instance *instance)
 939 {
 940         if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL)
 941                 return;
 942
 943         switch (instance->pdev->device) {
 944         case PCI_DEVICE_ID_LSI_INVADER:
 945                 switch (instance->pdev->subsystem_device) {
 946                 case MEGARAID_INTEL_RS3DC080_SSDID:
 947                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 948                                 instance->host->host_no,
 949                                 MEGARAID_INTEL_RS3DC080_BRANDING);
 950                         break;
 951                 case MEGARAID_INTEL_RS3DC040_SSDID:
 952                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 953                                 instance->host->host_no,
 954                                 MEGARAID_INTEL_RS3DC040_BRANDING);
 955                         break;
 956                 case MEGARAID_INTEL_RS3SC008_SSDID:
 957                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 958                                 instance->host->host_no,
 959                                 MEGARAID_INTEL_RS3SC008_BRANDING);
 960                         break;
 961                 case MEGARAID_INTEL_RS3MC044_SSDID:
 962                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 963                                 instance->host->host_no,
 964                                 MEGARAID_INTEL_RS3MC044_BRANDING);
 965                         break;
 966                 default:
 967                         break;
 968                 }
 969                 break;
 970         case PCI_DEVICE_ID_LSI_FURY:
 971                 switch (instance->pdev->subsystem_device) {
 972                 case MEGARAID_INTEL_RS3WC080_SSDID:
 973                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 974                                 instance->host->host_no,
 975                                 MEGARAID_INTEL_RS3WC080_BRANDING);
 976                         break;
 977                 case MEGARAID_INTEL_RS3WC040_SSDID:
 978                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 979                                 instance->host->host_no,
 980                                 MEGARAID_INTEL_RS3WC040_BRANDING);
 981                         break;
 982                 default:
 983                         break;
 984                 }
 985                 break;
 986         default:
 987                 break;
 988         }
 989 }
 990
 991 /**
 992  * megasas_init_adapter_fusion -        Initializes the FW
 993  * @instance:           Adapter soft state
 994  *
 995  * This is the main function for initializing firmware.
 996  */
 997 u32
 998 megasas_init_adapter_fusion(struct megasas_instance *instance)
 999 {
1000         struct megasas_register_set __iomem *reg_set;
1001         struct fusion_context *fusion;
1002         u32 max_cmd;
1003         int i = 0, count;
1004
1005         fusion = instance->ctrl_context;
1006
1007         reg_set = instance->reg_set;
1008
1009         /*
1010          * Get various operational parameters from status register
1011          */
1012         instance->max_fw_cmds =
1013                 instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
1014         instance->max_fw_cmds = min(instance->max_fw_cmds, (u16)1008);
1015
1016         /*
1017          * Reduce the max supported cmds by 1. This is to ensure that the
1018          * reply_q_sz (1 more than the max cmd that driver may send)
1019          * does not exceed max cmds that the FW can support
1020          */
1021         instance->max_fw_cmds = instance->max_fw_cmds-1;
1022
1023         /*
1024          * Only Driver's internal DCMDs and IOCTL DCMDs needs to have MFI frames
1025          */
1026         instance->max_mfi_cmds =
1027                 MEGASAS_FUSION_INTERNAL_CMDS + MEGASAS_FUSION_IOCTL_CMDS;
1028
1029         max_cmd = instance->max_fw_cmds;
1030
1031         fusion->reply_q_depth = 2 * (((max_cmd + 1 + 15)/16)*16);
1032
1033         fusion->request_alloc_sz =
1034                 sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *max_cmd;
1035         fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)
1036                 *(fusion->reply_q_depth);
1037         fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
1038                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE *
1039                  (max_cmd + 1)); /* Extra 1 for SMID 0 */
1040
1041         fusion->max_sge_in_main_msg =
1042           (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
1043            offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
1044
1045         fusion->max_sge_in_chain =
1046                 MEGASAS_MAX_SZ_CHAIN_FRAME / sizeof(union MPI2_SGE_IO_UNION);
1047
1048         instance->max_num_sge = rounddown_pow_of_two(
1049                 fusion->max_sge_in_main_msg + fusion->max_sge_in_chain - 2);
1050
1051         /* Used for pass thru MFI frame (DCMD) */
1052         fusion->chain_offset_mfi_pthru =
1053                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
1054
1055         fusion->chain_offset_io_request =
1056                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
1057                  sizeof(union MPI2_SGE_IO_UNION))/16;
1058
1059         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
1060         for (i = 0 ; i < count; i++)
1061                 fusion->last_reply_idx[i] = 0;
1062
1063         /*
1064          * Allocate memory for descriptors
1065          * Create a pool of commands
1066          */
1067         if (megasas_alloc_cmds(instance))
1068                 goto fail_alloc_mfi_cmds;
1069         if (megasas_alloc_cmds_fusion(instance))
1070                 goto fail_alloc_cmds;
1071
1072         if (megasas_ioc_init_fusion(instance))
1073                 goto fail_ioc_init;
1074
1075         megasas_display_intel_branding(instance);
1076         if (megasas_get_ctrl_info(instance)) {
1077                 dev_err(&instance->pdev->dev,
1078                         "Could not get controller info. Fail from %s %d\n",
1079                         __func__, __LINE__);
1080                 goto fail_ioc_init;
1081         }
1082
1083         instance->flag_ieee = 1;
1084         fusion->fast_path_io = 0;
1085
1086         fusion->drv_map_pages = get_order(fusion->drv_map_sz);
1087         for (i = 0; i < 2; i++) {
1088                 fusion->ld_map[i] = NULL;
1089                 fusion->ld_drv_map[i] = (void *)__get_free_pages(GFP_KERNEL,
1090                         fusion->drv_map_pages);
1091                 if (!fusion->ld_drv_map[i]) {
1092                         dev_err(&instance->pdev->dev, "Could not allocate "
1093                                 "memory for local map info for %d pages\n",
1094                                 fusion->drv_map_pages);
1095                         if (i == 1)
1096                                 free_pages((ulong)fusion->ld_drv_map[0],
1097                                         fusion->drv_map_pages);
1098                         goto fail_ioc_init;
1099                 }
1100                 memset(fusion->ld_drv_map[i], 0,
1101                         ((1 << PAGE_SHIFT) << fusion->drv_map_pages));
1102         }
1103
1104         for (i = 0; i < 2; i++) {
1105                 fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
1106                                                        fusion->max_map_sz,
1107                                                        &fusion->ld_map_phys[i],
1108                                                        GFP_KERNEL);
1109                 if (!fusion->ld_map[i]) {
1110                         printk(KERN_ERR "megasas: Could not allocate memory "
1111                                "for map info\n");
1112                         goto fail_map_info;
1113                 }
1114         }
1115
1116         if (!megasas_get_map_info(instance))
1117                 megasas_sync_map_info(instance);
1118
1119         return 0;
1120
1121 fail_map_info:
1122         if (i == 1)
1123                 dma_free_coherent(&instance->pdev->dev, fusion->max_map_sz,
1124                                   fusion->ld_map[0], fusion->ld_map_phys[0]);
1125 fail_ioc_init:
1126         megasas_free_cmds_fusion(instance);
1127 fail_alloc_cmds:
1128         megasas_free_cmds(instance);
1129 fail_alloc_mfi_cmds:
1130         return 1;
1131 }
1132
1133 /**
1134  * megasas_fire_cmd_fusion -    Sends command to the FW
1135  * @frame_phys_addr :           Physical address of cmd
1136  * @frame_count :               Number of frames for the command
1137  * @regs :                      MFI register set
1138  */
1139 void
1140 megasas_fire_cmd_fusion(struct megasas_instance *instance,
1141                         dma_addr_t req_desc_lo,
1142                         u32 req_desc_hi,
1143                         struct megasas_register_set __iomem *regs)
1144 {
1145 #if defined(writeq) && defined(CONFIG_64BIT)
1146         u64 req_data = (((u64)le32_to_cpu(req_desc_hi) << 32) |
1147                         le32_to_cpu(req_desc_lo));
1148
1149         writeq(req_data, &(regs)->inbound_low_queue_port);
1150 #else
1151         unsigned long flags;
1152
1153         spin_lock_irqsave(&instance->hba_lock, flags);
1154
1155         writel(le32_to_cpu(req_desc_lo), &(regs)->inbound_low_queue_port);
1156         writel(le32_to_cpu(req_desc_hi), &(regs)->inbound_high_queue_port);
1157         spin_unlock_irqrestore(&instance->hba_lock, flags);
1158 #endif
1159 }
1160
1161 /**
1162  * map_cmd_status -     Maps FW cmd status to OS cmd status
1163  * @cmd :               Pointer to cmd
1164  * @status :            status of cmd returned by FW
1165  * @ext_status :        ext status of cmd returned by FW
1166  */
1167
1168 void
1169 map_cmd_status(struct megasas_cmd_fusion *cmd, u8 status, u8 ext_status)
1170 {
1171
1172         switch (status) {
1173
1174         case MFI_STAT_OK:
1175                 cmd->scmd->result = DID_OK << 16;
1176                 break;
1177
1178         case MFI_STAT_SCSI_IO_FAILED:
1179         case MFI_STAT_LD_INIT_IN_PROGRESS:
1180                 cmd->scmd->result = (DID_ERROR << 16) | ext_status;
1181                 break;
1182
1183         case MFI_STAT_SCSI_DONE_WITH_ERROR:
1184
1185                 cmd->scmd->result = (DID_OK << 16) | ext_status;
1186                 if (ext_status == SAM_STAT_CHECK_CONDITION) {
1187                         memset(cmd->scmd->sense_buffer, 0,
1188                                SCSI_SENSE_BUFFERSIZE);
1189                         memcpy(cmd->scmd->sense_buffer, cmd->sense,
1190                                SCSI_SENSE_BUFFERSIZE);
1191                         cmd->scmd->result |= DRIVER_SENSE << 24;
1192                 }
1193                 break;
1194
1195         case MFI_STAT_LD_OFFLINE:
1196         case MFI_STAT_DEVICE_NOT_FOUND:
1197                 cmd->scmd->result = DID_BAD_TARGET << 16;
1198                 break;
1199         case MFI_STAT_CONFIG_SEQ_MISMATCH:
1200                 cmd->scmd->result = DID_IMM_RETRY << 16;
1201                 break;
1202         default:
1203                 printk(KERN_DEBUG "megasas: FW status %#x\n", status);
1204                 cmd->scmd->result = DID_ERROR << 16;
1205                 break;
1206         }
1207 }
1208
1209 /**
1210  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
1211  * @instance:           Adapter soft state
1212  * @scp:                SCSI command from the mid-layer
1213  * @sgl_ptr:            SGL to be filled in
1214  * @cmd:                cmd we are working on
1215  *
1216  * If successful, this function returns the number of SG elements.
1217  */
1218 static int
1219 megasas_make_sgl_fusion(struct megasas_instance *instance,
1220                         struct scsi_cmnd *scp,
1221                         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
1222                         struct megasas_cmd_fusion *cmd)
1223 {
1224         int i, sg_processed, sge_count;
1225         struct scatterlist *os_sgl;
1226         struct fusion_context *fusion;
1227
1228         fusion = instance->ctrl_context;
1229
1230         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1231                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1232                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
1233                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
1234                 sgl_ptr_end->Flags = 0;
1235         }
1236
1237         sge_count = scsi_dma_map(scp);
1238
1239         BUG_ON(sge_count < 0);
1240
1241         if (sge_count > instance->max_num_sge || !sge_count)
1242                 return sge_count;
1243
1244         scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1245                 sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl));
1246                 sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl));
1247                 sgl_ptr->Flags = 0;
1248                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1249                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1250                         if (i == sge_count - 1)
1251                                 sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
1252                 }
1253                 sgl_ptr++;
1254
1255                 sg_processed = i + 1;
1256
1257                 if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
1258                     (sge_count > fusion->max_sge_in_main_msg)) {
1259
1260                         struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
1261                         if ((instance->pdev->device ==
1262                                 PCI_DEVICE_ID_LSI_INVADER) ||
1263                                 (instance->pdev->device ==
1264                                 PCI_DEVICE_ID_LSI_FURY)) {
1265                                 if ((le16_to_cpu(cmd->io_request->IoFlags) &
1266                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
1267                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
1268                                         cmd->io_request->ChainOffset =
1269                                                 fusion->
1270                                                 chain_offset_io_request;
1271                                 else
1272                                         cmd->io_request->ChainOffset = 0;
1273                         } else
1274                                 cmd->io_request->ChainOffset =
1275                                         fusion->chain_offset_io_request;
1276
1277                         sg_chain = sgl_ptr;
1278                         /* Prepare chain element */
1279                         sg_chain->NextChainOffset = 0;
1280                         if ((instance->pdev->device ==
1281                                 PCI_DEVICE_ID_LSI_INVADER) ||
1282                                 (instance->pdev->device ==
1283                                 PCI_DEVICE_ID_LSI_FURY))
1284                                 sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
1285                         else
1286                                 sg_chain->Flags =
1287                                         (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
1288                                          MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
1289                         sg_chain->Length =  cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed)));
1290                         sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr);
1291
1292                         sgl_ptr =
1293                           (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
1294                         memset(sgl_ptr, 0, MEGASAS_MAX_SZ_CHAIN_FRAME);
1295                 }
1296         }
1297
1298         return sge_count;
1299 }
1300
1301 /**
1302  * megasas_set_pd_lba - Sets PD LBA
1303  * @cdb:                CDB
1304  * @cdb_len:            cdb length
1305  * @start_blk:          Start block of IO
1306  *
1307  * Used to set the PD LBA in CDB for FP IOs
1308  */
1309 void
1310 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
1311                    struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
1312                    struct MR_DRV_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
1313 {
1314         struct MR_LD_RAID *raid;
1315         u32 ld;
1316         u64 start_blk = io_info->pdBlock;
1317         u8 *cdb = io_request->CDB.CDB32;
1318         u32 num_blocks = io_info->numBlocks;
1319         u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
1320
1321         /* Check if T10 PI (DIF) is enabled for this LD */
1322         ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
1323         raid = MR_LdRaidGet(ld, local_map_ptr);
1324         if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
1325                 memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1326                 cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
1327                 cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
1328
1329                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1330                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
1331                 else
1332                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
1333                 cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
1334
1335                 /* LBA */
1336                 cdb[12] = (u8)((start_blk >> 56) & 0xff);
1337                 cdb[13] = (u8)((start_blk >> 48) & 0xff);
1338                 cdb[14] = (u8)((start_blk >> 40) & 0xff);
1339                 cdb[15] = (u8)((start_blk >> 32) & 0xff);
1340                 cdb[16] = (u8)((start_blk >> 24) & 0xff);
1341                 cdb[17] = (u8)((start_blk >> 16) & 0xff);
1342                 cdb[18] = (u8)((start_blk >> 8) & 0xff);
1343                 cdb[19] = (u8)(start_blk & 0xff);
1344
1345                 /* Logical block reference tag */
1346                 io_request->CDB.EEDP32.PrimaryReferenceTag =
1347                         cpu_to_be32(ref_tag);
1348                 io_request->CDB.EEDP32.PrimaryApplicationTagMask = cpu_to_be16(0xffff);
1349                 io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */
1350
1351                 /* Transfer length */
1352                 cdb[28] = (u8)((num_blocks >> 24) & 0xff);
1353                 cdb[29] = (u8)((num_blocks >> 16) & 0xff);
1354                 cdb[30] = (u8)((num_blocks >> 8) & 0xff);
1355                 cdb[31] = (u8)(num_blocks & 0xff);
1356
1357                 /* set SCSI IO EEDPFlags */
1358                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) {
1359                         io_request->EEDPFlags = cpu_to_le16(
1360                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
1361                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
1362                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
1363                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
1364                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD);
1365                 } else {
1366                         io_request->EEDPFlags = cpu_to_le16(
1367                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
1368                                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP);
1369                 }
1370                 io_request->Control |= cpu_to_le32((0x4 << 26));
1371                 io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size);
1372         } else {
1373                 /* Some drives don't support 16/12 byte CDB's, convert to 10 */
1374                 if (((cdb_len == 12) || (cdb_len == 16)) &&
1375                     (start_blk <= 0xffffffff)) {
1376                         if (cdb_len == 16) {
1377                                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
1378                                 flagvals = cdb[1];
1379                                 groupnum = cdb[14];
1380                                 control = cdb[15];
1381                         } else {
1382                                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
1383                                 flagvals = cdb[1];
1384                                 groupnum = cdb[10];
1385                                 control = cdb[11];
1386                         }
1387
1388                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1389
1390                         cdb[0] = opcode;
1391                         cdb[1] = flagvals;
1392                         cdb[6] = groupnum;
1393                         cdb[9] = control;
1394
1395                         /* Transfer length */
1396                         cdb[8] = (u8)(num_blocks & 0xff);
1397                         cdb[7] = (u8)((num_blocks >> 8) & 0xff);
1398
1399                         io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */
1400                         cdb_len = 10;
1401                 } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
1402                         /* Convert to 16 byte CDB for large LBA's */
1403                         switch (cdb_len) {
1404                         case 6:
1405                                 opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
1406                                 control = cdb[5];
1407                                 break;
1408                         case 10:
1409                                 opcode =
1410                                         cdb[0] == READ_10 ? READ_16 : WRITE_16;
1411                                 flagvals = cdb[1];
1412                                 groupnum = cdb[6];
1413                                 control = cdb[9];
1414                                 break;
1415                         case 12:
1416                                 opcode =
1417                                         cdb[0] == READ_12 ? READ_16 : WRITE_16;
1418                                 flagvals = cdb[1];
1419                                 groupnum = cdb[10];
1420                                 control = cdb[11];
1421                                 break;
1422                         }
1423
1424                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1425
1426                         cdb[0] = opcode;
1427                         cdb[1] = flagvals;
1428                         cdb[14] = groupnum;
1429                         cdb[15] = control;
1430
1431                         /* Transfer length */
1432                         cdb[13] = (u8)(num_blocks & 0xff);
1433                         cdb[12] = (u8)((num_blocks >> 8) & 0xff);
1434                         cdb[11] = (u8)((num_blocks >> 16) & 0xff);
1435                         cdb[10] = (u8)((num_blocks >> 24) & 0xff);
1436
1437                         io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */
1438                         cdb_len = 16;
1439                 }
1440
1441                 /* Normal case, just load LBA here */
1442                 switch (cdb_len) {
1443                 case 6:
1444                 {
1445                         u8 val = cdb[1] & 0xE0;
1446                         cdb[3] = (u8)(start_blk & 0xff);
1447                         cdb[2] = (u8)((start_blk >> 8) & 0xff);
1448                         cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
1449                         break;
1450                 }
1451                 case 10:
1452                         cdb[5] = (u8)(start_blk & 0xff);
1453                         cdb[4] = (u8)((start_blk >> 8) & 0xff);
1454                         cdb[3] = (u8)((start_blk >> 16) & 0xff);
1455                         cdb[2] = (u8)((start_blk >> 24) & 0xff);
1456                         break;
1457                 case 12:
1458                         cdb[5]    = (u8)(start_blk & 0xff);
1459                         cdb[4]    = (u8)((start_blk >> 8) & 0xff);
1460                         cdb[3]    = (u8)((start_blk >> 16) & 0xff);
1461                         cdb[2]    = (u8)((start_blk >> 24) & 0xff);
1462                         break;
1463                 case 16:
1464                         cdb[9]    = (u8)(start_blk & 0xff);
1465                         cdb[8]    = (u8)((start_blk >> 8) & 0xff);
1466                         cdb[7]    = (u8)((start_blk >> 16) & 0xff);
1467                         cdb[6]    = (u8)((start_blk >> 24) & 0xff);
1468                         cdb[5]    = (u8)((start_blk >> 32) & 0xff);
1469                         cdb[4]    = (u8)((start_blk >> 40) & 0xff);
1470                         cdb[3]    = (u8)((start_blk >> 48) & 0xff);
1471                         cdb[2]    = (u8)((start_blk >> 56) & 0xff);
1472                         break;
1473                 }
1474         }
1475 }
1476
1477 /**
1478  * megasas_build_ldio_fusion -  Prepares IOs to devices
1479  * @instance:           Adapter soft state
1480  * @scp:                SCSI command
1481  * @cmd:                Command to be prepared
1482  *
1483  * Prepares the io_request and chain elements (sg_frame) for IO
1484  * The IO can be for PD (Fast Path) or LD
1485  */
1486 void
1487 megasas_build_ldio_fusion(struct megasas_instance *instance,
1488                           struct scsi_cmnd *scp,
1489                           struct megasas_cmd_fusion *cmd)
1490 {
1491         u8 fp_possible;
1492         u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
1493         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1494         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1495         struct IO_REQUEST_INFO io_info;
1496         struct fusion_context *fusion;
1497         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
1498         u8 *raidLUN;
1499
1500         device_id = MEGASAS_DEV_INDEX(instance, scp);
1501
1502         fusion = instance->ctrl_context;
1503
1504         io_request = cmd->io_request;
1505         io_request->RaidContext.VirtualDiskTgtId = cpu_to_le16(device_id);
1506         io_request->RaidContext.status = 0;
1507         io_request->RaidContext.exStatus = 0;
1508
1509         req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc;
1510
1511         start_lba_lo = 0;
1512         start_lba_hi = 0;
1513         fp_possible = 0;
1514
1515         /*
1516          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1517          */
1518         if (scp->cmd_len == 6) {
1519                 datalength = (u32) scp->cmnd[4];
1520                 start_lba_lo = ((u32) scp->cmnd[1] << 16) |
1521                         ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
1522
1523                 start_lba_lo &= 0x1FFFFF;
1524         }
1525
1526         /*
1527          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1528          */
1529         else if (scp->cmd_len == 10) {
1530                 datalength = (u32) scp->cmnd[8] |
1531                         ((u32) scp->cmnd[7] << 8);
1532                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1533                         ((u32) scp->cmnd[3] << 16) |
1534                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1535         }
1536
1537         /*
1538          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1539          */
1540         else if (scp->cmd_len == 12) {
1541                 datalength = ((u32) scp->cmnd[6] << 24) |
1542                         ((u32) scp->cmnd[7] << 16) |
1543                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1544                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1545                         ((u32) scp->cmnd[3] << 16) |
1546                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1547         }
1548
1549         /*
1550          * 16-byte READ(0x88) or WRITE(0x8A) cdb
1551          */
1552         else if (scp->cmd_len == 16) {
1553                 datalength = ((u32) scp->cmnd[10] << 24) |
1554                         ((u32) scp->cmnd[11] << 16) |
1555                         ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
1556                 start_lba_lo = ((u32) scp->cmnd[6] << 24) |
1557                         ((u32) scp->cmnd[7] << 16) |
1558                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1559
1560                 start_lba_hi = ((u32) scp->cmnd[2] << 24) |
1561                         ((u32) scp->cmnd[3] << 16) |
1562                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1563         }
1564
1565         memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
1566         io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
1567         io_info.numBlocks = datalength;
1568         io_info.ldTgtId = device_id;
1569         io_request->DataLength = cpu_to_le32(scsi_bufflen(scp));
1570
1571         if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1572                 io_info.isRead = 1;
1573
1574         local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
1575
1576         if ((MR_TargetIdToLdGet(device_id, local_map_ptr) >=
1577                 instance->fw_supported_vd_count) || (!fusion->fast_path_io)) {
1578                 io_request->RaidContext.regLockFlags  = 0;
1579                 fp_possible = 0;
1580         } else {
1581                 if (MR_BuildRaidContext(instance, &io_info,
1582                                         &io_request->RaidContext,
1583                                         local_map_ptr, &raidLUN))
1584                         fp_possible = io_info.fpOkForIo;
1585         }
1586
1587         /* Use raw_smp_processor_id() for now until cmd->request->cpu is CPU
1588            id by default, not CPU group id, otherwise all MSI-X queues won't
1589            be utilized */
1590         cmd->request_desc->SCSIIO.MSIxIndex = instance->msix_vectors ?
1591                 raw_smp_processor_id() % instance->msix_vectors : 0;
1592
1593         if (fp_possible) {
1594                 megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
1595                                    local_map_ptr, start_lba_lo);
1596                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
1597                 cmd->request_desc->SCSIIO.RequestFlags =
1598                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY
1599                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1600                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1601                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1602                         if (io_request->RaidContext.regLockFlags ==
1603                             REGION_TYPE_UNUSED)
1604                                 cmd->request_desc->SCSIIO.RequestFlags =
1605                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
1606                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1607                         io_request->RaidContext.Type = MPI2_TYPE_CUDA;
1608                         io_request->RaidContext.nseg = 0x1;
1609                         io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
1610                         io_request->RaidContext.regLockFlags |=
1611                           (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
1612                            MR_RL_FLAGS_SEQ_NUM_ENABLE);
1613                 }
1614                 if ((fusion->load_balance_info[device_id].loadBalanceFlag) &&
1615                     (io_info.isRead)) {
1616                         io_info.devHandle =
1617                                 get_updated_dev_handle(instance,
1618                                         &fusion->load_balance_info[device_id],
1619                                         &io_info);
1620                         scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
1621                         cmd->pd_r1_lb = io_info.pd_after_lb;
1622                 } else
1623                         scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
1624                 cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
1625                 io_request->DevHandle = io_info.devHandle;
1626                 /* populate the LUN field */
1627                 memcpy(io_request->LUN, raidLUN, 8);
1628         } else {
1629                 io_request->RaidContext.timeoutValue =
1630                         cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
1631                 cmd->request_desc->SCSIIO.RequestFlags =
1632                         (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
1633                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1634                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1635                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1636                         if (io_request->RaidContext.regLockFlags ==
1637                             REGION_TYPE_UNUSED)
1638                                 cmd->request_desc->SCSIIO.RequestFlags =
1639                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
1640                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1641                         io_request->RaidContext.Type = MPI2_TYPE_CUDA;
1642                         io_request->RaidContext.regLockFlags |=
1643                                 (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
1644                                  MR_RL_FLAGS_SEQ_NUM_ENABLE);
1645                         io_request->RaidContext.nseg = 0x1;
1646                 }
1647                 io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1648                 io_request->DevHandle = cpu_to_le16(device_id);
1649         } /* Not FP */
1650 }
1651
1652 /**
1653  * megasas_build_dcdb_fusion -  Prepares IOs to devices
1654  * @instance:           Adapter soft state
1655  * @scp:                SCSI command
1656  * @cmd:                Command to be prepared
1657  *
1658  * Prepares the io_request frame for non-io cmds
1659  */
1660 static void
1661 megasas_build_dcdb_fusion(struct megasas_instance *instance,
1662                           struct scsi_cmnd *scmd,
1663                           struct megasas_cmd_fusion *cmd)
1664 {
1665         u32 device_id;
1666         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1667         u16 pd_index = 0;
1668         u16 os_timeout_value;
1669         u16 timeout_limit;
1670         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
1671         struct fusion_context *fusion = instance->ctrl_context;
1672         u8                          span, physArm;
1673         u16                         devHandle;
1674         u32                         ld, arRef, pd;
1675         struct MR_LD_RAID                  *raid;
1676         struct RAID_CONTEXT                *pRAID_Context;
1677
1678         io_request = cmd->io_request;
1679         device_id = MEGASAS_DEV_INDEX(instance, scmd);
1680         pd_index = (scmd->device->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
1681                 +scmd->device->id;
1682         local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
1683
1684         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
1685
1686         if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS &&
1687             instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
1688                 if (fusion->fast_path_io)
1689                         io_request->DevHandle =
1690                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
1691                 io_request->RaidContext.RAIDFlags =
1692                         MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD
1693                         << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
1694                 cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
1695                 cmd->request_desc->SCSIIO.MSIxIndex =
1696                         instance->msix_vectors ?
1697                                 raw_smp_processor_id() %
1698                                         instance->msix_vectors :
1699                                 0;
1700                 os_timeout_value = scmd->request->timeout / HZ;
1701
1702                 if (instance->secure_jbod_support &&
1703                         (megasas_cmd_type(scmd) == NON_READ_WRITE_SYSPDIO)) {
1704                         /* system pd firmware path */
1705                         io_request->Function  =
1706                                 MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1707                         cmd->request_desc->SCSIIO.RequestFlags =
1708                                 (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
1709                                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1710                         io_request->RaidContext.timeoutValue =
1711                                 cpu_to_le16(os_timeout_value);
1712                 } else {
1713                         /* system pd Fast Path */
1714                         io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
1715                         io_request->RaidContext.regLockFlags = 0;
1716                         io_request->RaidContext.regLockRowLBA = 0;
1717                         io_request->RaidContext.regLockLength = 0;
1718                         timeout_limit = (scmd->device->type == TYPE_DISK) ?
1719                                         255 : 0xFFFF;
1720                         io_request->RaidContext.timeoutValue =
1721                                 cpu_to_le16((os_timeout_value > timeout_limit) ?
1722                                 timeout_limit : os_timeout_value);
1723                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1724                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
1725                         io_request->IoFlags |=
1726                         cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
1727
1728                         cmd->request_desc->SCSIIO.RequestFlags =
1729                                 (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
1730                                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1731                 }
1732         } else {
1733                 if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS)
1734                         goto NonFastPath;
1735
1736                 /*
1737                  * For older firmware, Driver should not access ldTgtIdToLd
1738                  * beyond index 127 and for Extended VD firmware, ldTgtIdToLd
1739                  * should not go beyond 255.
1740                  */
1741
1742                 if ((!fusion->fast_path_io) ||
1743                         (device_id >= instance->fw_supported_vd_count))
1744                         goto NonFastPath;
1745
1746                 ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
1747
1748                 if (ld >= instance->fw_supported_vd_count)
1749                         goto NonFastPath;
1750
1751                 raid = MR_LdRaidGet(ld, local_map_ptr);
1752
1753                 /* check if this LD is FP capable */
1754                 if (!(raid->capability.fpNonRWCapable))
1755                         /* not FP capable, send as non-FP */
1756                         goto NonFastPath;
1757
1758                 /* get RAID_Context pointer */
1759                 pRAID_Context = &io_request->RaidContext;
1760
1761                 /* set RAID context values */
1762                 pRAID_Context->regLockFlags     = REGION_TYPE_SHARED_READ;
1763                 pRAID_Context->timeoutValue     = cpu_to_le16(raid->fpIoTimeoutForLd);
1764                 pRAID_Context->VirtualDiskTgtId = cpu_to_le16(device_id);
1765                 pRAID_Context->regLockRowLBA    = 0;
1766                 pRAID_Context->regLockLength    = 0;
1767                 pRAID_Context->configSeqNum     = raid->seqNum;
1768
1769                 /* get the DevHandle for the PD (since this is
1770                    fpNonRWCapable, this is a single disk RAID0) */
1771                 span = physArm = 0;
1772                 arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
1773                 pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
1774                 devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
1775
1776                 /* build request descriptor */
1777                 cmd->request_desc->SCSIIO.RequestFlags =
1778                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
1779                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1780                 cmd->request_desc->SCSIIO.DevHandle = devHandle;
1781
1782                 /* populate the LUN field */
1783                 memcpy(io_request->LUN, raid->LUN, 8);
1784
1785                 /* build the raidScsiIO structure */
1786                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
1787                 io_request->DevHandle = devHandle;
1788
1789                 return;
1790
1791 NonFastPath:
1792                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1793                 io_request->DevHandle = cpu_to_le16(device_id);
1794                 cmd->request_desc->SCSIIO.RequestFlags =
1795                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
1796                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1797         }
1798         io_request->RaidContext.VirtualDiskTgtId = cpu_to_le16(device_id);
1799         int_to_scsilun(scmd->device->lun, (struct scsi_lun *)io_request->LUN);
1800 }
1801
1802 /**
1803  * megasas_build_io_fusion -    Prepares IOs to devices
1804  * @instance:           Adapter soft state
1805  * @scp:                SCSI command
1806  * @cmd:                Command to be prepared
1807  *
1808  * Invokes helper functions to prepare request frames
1809  * and sets flags appropriate for IO/Non-IO cmd
1810  */
1811 int
1812 megasas_build_io_fusion(struct megasas_instance *instance,
1813                         struct scsi_cmnd *scp,
1814                         struct megasas_cmd_fusion *cmd)
1815 {
1816         u32 device_id, sge_count;
1817         struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
1818
1819         device_id = MEGASAS_DEV_INDEX(instance, scp);
1820
1821         /* Zero out some fields so they don't get reused */
1822         memset(io_request->LUN, 0x0, 8);
1823         io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
1824         io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
1825         io_request->EEDPFlags = 0;
1826         io_request->Control = 0;
1827         io_request->EEDPBlockSize = 0;
1828         io_request->ChainOffset = 0;
1829         io_request->RaidContext.RAIDFlags = 0;
1830         io_request->RaidContext.Type = 0;
1831         io_request->RaidContext.nseg = 0;
1832
1833         memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
1834         /*
1835          * Just the CDB length,rest of the Flags are zero
1836          * This will be modified for FP in build_ldio_fusion
1837          */
1838         io_request->IoFlags = cpu_to_le16(scp->cmd_len);
1839
1840         if (megasas_cmd_type(scp) == READ_WRITE_LDIO)
1841                 megasas_build_ldio_fusion(instance, scp, cmd);
1842         else
1843                 megasas_build_dcdb_fusion(instance, scp, cmd);
1844
1845         /*
1846          * Construct SGL
1847          */
1848
1849         sge_count =
1850                 megasas_make_sgl_fusion(instance, scp,
1851                                         (struct MPI25_IEEE_SGE_CHAIN64 *)
1852                                         &io_request->SGL, cmd);
1853
1854         if (sge_count > instance->max_num_sge) {
1855                 printk(KERN_ERR "megasas: Error. sge_count (0x%x) exceeds "
1856                        "max (0x%x) allowed\n", sge_count,
1857                        instance->max_num_sge);
1858                 return 1;
1859         }
1860
1861         io_request->RaidContext.numSGE = sge_count;
1862
1863         io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING);
1864
1865         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1866                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE);
1867         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1868                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ);
1869
1870         io_request->SGLOffset0 =
1871                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
1872
1873         io_request->SenseBufferLowAddress = cpu_to_le32(cmd->sense_phys_addr);
1874         io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
1875
1876         cmd->scmd = scp;
1877         scp->SCp.ptr = (char *)cmd;
1878
1879         return 0;
1880 }
1881
1882 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
1883 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
1884 {
1885         u8 *p;
1886         struct fusion_context *fusion;
1887
1888         if (index >= instance->max_fw_cmds) {
1889                 printk(KERN_ERR "megasas: Invalid SMID (0x%x)request for "
1890                        "descriptor for scsi%d\n", index,
1891                         instance->host->host_no);
1892                 return NULL;
1893         }
1894         fusion = instance->ctrl_context;
1895         p = fusion->req_frames_desc
1896                 +sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *index;
1897
1898         return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
1899 }
1900
1901 /**
1902  * megasas_build_and_issue_cmd_fusion -Main routine for building and
1903  *                                     issuing non IOCTL cmd
1904  * @instance:                   Adapter soft state
1905  * @scmd:                       pointer to scsi cmd from OS
1906  */
1907 static u32
1908 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
1909                                    struct scsi_cmnd *scmd)
1910 {
1911         struct megasas_cmd_fusion *cmd;
1912         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1913         u32 index;
1914         struct fusion_context *fusion;
1915
1916         fusion = instance->ctrl_context;
1917
1918         cmd = megasas_get_cmd_fusion(instance);
1919         if (!cmd)
1920                 return SCSI_MLQUEUE_HOST_BUSY;
1921
1922         index = cmd->index;
1923
1924         req_desc = megasas_get_request_descriptor(instance, index-1);
1925         if (!req_desc)
1926                 return 1;
1927
1928         req_desc->Words = 0;
1929         cmd->request_desc = req_desc;
1930
1931         if (megasas_build_io_fusion(instance, scmd, cmd)) {
1932                 megasas_return_cmd_fusion(instance, cmd);
1933                 printk(KERN_ERR "megasas: Error building command.\n");
1934                 cmd->request_desc = NULL;
1935                 return 1;
1936         }
1937
1938         req_desc = cmd->request_desc;
1939         req_desc->SCSIIO.SMID = cpu_to_le16(index);
1940
1941         if (cmd->io_request->ChainOffset != 0 &&
1942             cmd->io_request->ChainOffset != 0xF)
1943                 printk(KERN_ERR "megasas: The chain offset value is not "
1944                        "correct : %x\n", cmd->io_request->ChainOffset);
1945
1946         /*
1947          * Issue the command to the FW
1948          */
1949         atomic_inc(&instance->fw_outstanding);
1950
1951         instance->instancet->fire_cmd(instance,
1952                                       req_desc->u.low, req_desc->u.high,
1953                                       instance->reg_set);
1954
1955         return 0;
1956 }
1957
1958 /**
1959  * complete_cmd_fusion -        Completes command
1960  * @instance:                   Adapter soft state
1961  * Completes all commands that is in reply descriptor queue
1962  */
1963 int
1964 complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
1965 {
1966         union MPI2_REPLY_DESCRIPTORS_UNION *desc;
1967         struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
1968         struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
1969         struct fusion_context *fusion;
1970         struct megasas_cmd *cmd_mfi;
1971         struct megasas_cmd_fusion *cmd_fusion;
1972         u16 smid, num_completed;
1973         u8 reply_descript_type;
1974         u32 status, extStatus, device_id;
1975         union desc_value d_val;
1976         struct LD_LOAD_BALANCE_INFO *lbinfo;
1977         int threshold_reply_count = 0;
1978
1979         fusion = instance->ctrl_context;
1980
1981         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
1982                 return IRQ_HANDLED;
1983
1984         desc = fusion->reply_frames_desc;
1985         desc += ((MSIxIndex * fusion->reply_alloc_sz)/
1986                  sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)) +
1987                 fusion->last_reply_idx[MSIxIndex];
1988
1989         reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1990
1991         d_val.word = desc->Words;
1992
1993         reply_descript_type = reply_desc->ReplyFlags &
1994                 MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1995
1996         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1997                 return IRQ_NONE;
1998
1999         num_completed = 0;
2000
2001         while ((d_val.u.low != UINT_MAX) && (d_val.u.high != UINT_MAX)) {
2002                 smid = le16_to_cpu(reply_desc->SMID);
2003
2004                 cmd_fusion = fusion->cmd_list[smid - 1];
2005
2006                 scsi_io_req =
2007                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
2008                   cmd_fusion->io_request;
2009
2010                 if (cmd_fusion->scmd)
2011                         cmd_fusion->scmd->SCp.ptr = NULL;
2012
2013                 status = scsi_io_req->RaidContext.status;
2014                 extStatus = scsi_io_req->RaidContext.exStatus;
2015
2016                 switch (scsi_io_req->Function) {
2017                 case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
2018                         /* Update load balancing info */
2019                         device_id = MEGASAS_DEV_INDEX(instance,
2020                                                       cmd_fusion->scmd);
2021                         lbinfo = &fusion->load_balance_info[device_id];
2022                         if (cmd_fusion->scmd->SCp.Status &
2023                             MEGASAS_LOAD_BALANCE_FLAG) {
2024                                 atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]);
2025                                 cmd_fusion->scmd->SCp.Status &=
2026                                         ~MEGASAS_LOAD_BALANCE_FLAG;
2027                         }
2028                         if (reply_descript_type ==
2029                             MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) {
2030                                 if (megasas_dbg_lvl == 5)
2031                                         printk(KERN_ERR "\nmegasas: FAST Path "
2032                                                "IO Success\n");
2033                         }
2034                         /* Fall thru and complete IO */
2035                 case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
2036                         /* Map the FW Cmd Status */
2037                         map_cmd_status(cmd_fusion, status, extStatus);
2038                         scsi_dma_unmap(cmd_fusion->scmd);
2039                         cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
2040                         scsi_io_req->RaidContext.status = 0;
2041                         scsi_io_req->RaidContext.exStatus = 0;
2042                         megasas_return_cmd_fusion(instance, cmd_fusion);
2043                         atomic_dec(&instance->fw_outstanding);
2044
2045                         break;
2046                 case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
2047                         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
2048
2049                         if (!cmd_mfi->mpt_pthr_cmd_blocked) {
2050                                 if (megasas_dbg_lvl == 5)
2051                                         dev_info(&instance->pdev->dev,
2052                                                 "freeing mfi/mpt pass-through "
2053                                                 "from %s %d\n",
2054                                                  __func__, __LINE__);
2055                                 megasas_return_mfi_mpt_pthr(instance, cmd_mfi,
2056                                         cmd_fusion);
2057                         }
2058
2059                         megasas_complete_cmd(instance, cmd_mfi, DID_OK);
2060                         cmd_fusion->flags = 0;
2061                         break;
2062                 }
2063
2064                 fusion->last_reply_idx[MSIxIndex]++;
2065                 if (fusion->last_reply_idx[MSIxIndex] >=
2066                     fusion->reply_q_depth)
2067                         fusion->last_reply_idx[MSIxIndex] = 0;
2068
2069                 desc->Words = ULLONG_MAX;
2070                 num_completed++;
2071                 threshold_reply_count++;
2072
2073                 /* Get the next reply descriptor */
2074                 if (!fusion->last_reply_idx[MSIxIndex])
2075                         desc = fusion->reply_frames_desc +
2076                                 ((MSIxIndex * fusion->reply_alloc_sz)/
2077                                  sizeof(union MPI2_REPLY_DESCRIPTORS_UNION));
2078                 else
2079                         desc++;
2080
2081                 reply_desc =
2082                   (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
2083
2084                 d_val.word = desc->Words;
2085
2086                 reply_descript_type = reply_desc->ReplyFlags &
2087                         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
2088
2089                 if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
2090                         break;
2091                 /*
2092                  * Write to reply post host index register after completing threshold
2093                  * number of reply counts and still there are more replies in reply queue
2094                  * pending to be completed
2095                  */
2096                 if (threshold_reply_count >= THRESHOLD_REPLY_COUNT) {
2097                         if ((instance->pdev->device ==
2098                                 PCI_DEVICE_ID_LSI_INVADER) ||
2099                                 (instance->pdev->device ==
2100                                 PCI_DEVICE_ID_LSI_FURY))
2101                                 writel(((MSIxIndex & 0x7) << 24) |
2102                                         fusion->last_reply_idx[MSIxIndex],
2103                                         instance->reply_post_host_index_addr[MSIxIndex/8]);
2104                         else
2105                                 writel((MSIxIndex << 24) |
2106                                         fusion->last_reply_idx[MSIxIndex],
2107                                         instance->reply_post_host_index_addr[0]);
2108                         threshold_reply_count = 0;
2109                 }
2110         }
2111
2112         if (!num_completed)
2113                 return IRQ_NONE;
2114
2115         wmb();
2116         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
2117                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
2118                 writel(((MSIxIndex & 0x7) << 24) |
2119                         fusion->last_reply_idx[MSIxIndex],
2120                         instance->reply_post_host_index_addr[MSIxIndex/8]);
2121         else
2122                 writel((MSIxIndex << 24) |
2123                         fusion->last_reply_idx[MSIxIndex],
2124                         instance->reply_post_host_index_addr[0]);
2125         megasas_check_and_restore_queue_depth(instance);
2126         return IRQ_HANDLED;
2127 }
2128
2129 /**
2130  * megasas_complete_cmd_dpc_fusion -    Completes command
2131  * @instance:                   Adapter soft state
2132  *
2133  * Tasklet to complete cmds
2134  */
2135 void
2136 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
2137 {
2138         struct megasas_instance *instance =
2139                 (struct megasas_instance *)instance_addr;
2140         unsigned long flags;
2141         u32 count, MSIxIndex;
2142
2143         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
2144
2145         /* If we have already declared adapter dead, donot complete cmds */
2146         spin_lock_irqsave(&instance->hba_lock, flags);
2147         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2148                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2149                 return;
2150         }
2151         spin_unlock_irqrestore(&instance->hba_lock, flags);
2152
2153         for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
2154                 complete_cmd_fusion(instance, MSIxIndex);
2155 }
2156
2157 /**
2158  * megasas_isr_fusion - isr entry point
2159  */
2160 irqreturn_t megasas_isr_fusion(int irq, void *devp)
2161 {
2162         struct megasas_irq_context *irq_context = devp;
2163         struct megasas_instance *instance = irq_context->instance;
2164         u32 mfiStatus, fw_state, dma_state;
2165
2166         if (instance->mask_interrupts)
2167                 return IRQ_NONE;
2168
2169         if (!instance->msix_vectors) {
2170                 mfiStatus = instance->instancet->clear_intr(instance->reg_set);
2171                 if (!mfiStatus)
2172                         return IRQ_NONE;
2173         }
2174
2175         /* If we are resetting, bail */
2176         if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
2177                 instance->instancet->clear_intr(instance->reg_set);
2178                 return IRQ_HANDLED;
2179         }
2180
2181         if (!complete_cmd_fusion(instance, irq_context->MSIxIndex)) {
2182                 instance->instancet->clear_intr(instance->reg_set);
2183                 /* If we didn't complete any commands, check for FW fault */
2184                 fw_state = instance->instancet->read_fw_status_reg(
2185                         instance->reg_set) & MFI_STATE_MASK;
2186                 dma_state = instance->instancet->read_fw_status_reg
2187                         (instance->reg_set) & MFI_STATE_DMADONE;
2188                 if (instance->crash_dump_drv_support &&
2189                         instance->crash_dump_app_support) {
2190                         /* Start collecting crash, if DMA bit is done */
2191                         if ((fw_state == MFI_STATE_FAULT) && dma_state)
2192                                 schedule_work(&instance->crash_init);
2193                         else if (fw_state == MFI_STATE_FAULT)
2194                                 schedule_work(&instance->work_init);
2195                 } else if (fw_state == MFI_STATE_FAULT) {
2196                         printk(KERN_WARNING "megaraid_sas: Iop2SysDoorbellInt"
2197                                "for scsi%d\n", instance->host->host_no);
2198                         schedule_work(&instance->work_init);
2199                 }
2200         }
2201
2202         return IRQ_HANDLED;
2203 }
2204
2205 /**
2206  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
2207  * @instance:                   Adapter soft state
2208  * mfi_cmd:                     megasas_cmd pointer
2209  *
2210  */
2211 u8
2212 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
2213                         struct megasas_cmd *mfi_cmd)
2214 {
2215         struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
2216         struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
2217         struct megasas_cmd_fusion *cmd;
2218         struct fusion_context *fusion;
2219         struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
2220         u32 opcode;
2221
2222         cmd = megasas_get_cmd_fusion(instance);
2223         if (!cmd)
2224                 return 1;
2225
2226         /*  Save the smid. To be used for returning the cmd */
2227         mfi_cmd->context.smid = cmd->index;
2228         cmd->sync_cmd_idx = mfi_cmd->index;
2229
2230         /* Set this only for Blocked commands */
2231         opcode = le32_to_cpu(mfi_cmd->frame->dcmd.opcode);
2232         if ((opcode == MR_DCMD_LD_MAP_GET_INFO)
2233                 && (mfi_cmd->frame->dcmd.mbox.b[1] == 1))
2234                 mfi_cmd->is_wait_event = 1;
2235
2236         if (opcode == MR_DCMD_CTRL_EVENT_WAIT)
2237                 mfi_cmd->is_wait_event = 1;
2238
2239         if (mfi_cmd->is_wait_event)
2240                 mfi_cmd->mpt_pthr_cmd_blocked = cmd;
2241
2242         /*
2243          * For cmds where the flag is set, store the flag and check
2244          * on completion. For cmds with this flag, don't call
2245          * megasas_complete_cmd
2246          */
2247
2248         if (frame_hdr->flags & cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE))
2249                 cmd->flags = MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
2250
2251         fusion = instance->ctrl_context;
2252         io_req = cmd->io_request;
2253
2254         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
2255                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
2256                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
2257                         (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
2258                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
2259                 sgl_ptr_end->Flags = 0;
2260         }
2261
2262         mpi25_ieee_chain =
2263           (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
2264
2265         io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
2266         io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
2267                                        SGL) / 4;
2268         io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
2269
2270         mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr);
2271
2272         mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2273                 MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
2274
2275         mpi25_ieee_chain->Length = cpu_to_le32(MEGASAS_MAX_SZ_CHAIN_FRAME);
2276
2277         return 0;
2278 }
2279
2280 /**
2281  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
2282  * @instance:                   Adapter soft state
2283  * @cmd:                        mfi cmd to build
2284  *
2285  */
2286 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
2287 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
2288 {
2289         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2290         u16 index;
2291
2292         if (build_mpt_mfi_pass_thru(instance, cmd)) {
2293                 printk(KERN_ERR "Couldn't build MFI pass thru cmd\n");
2294                 return NULL;
2295         }
2296
2297         index = cmd->context.smid;
2298
2299         req_desc = megasas_get_request_descriptor(instance, index - 1);
2300
2301         if (!req_desc)
2302                 return NULL;
2303
2304         req_desc->Words = 0;
2305         req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
2306                                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2307
2308         req_desc->SCSIIO.SMID = cpu_to_le16(index);
2309
2310         return req_desc;
2311 }
2312
2313 /**
2314  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
2315  * @instance:                   Adapter soft state
2316  * @cmd:                        mfi cmd pointer
2317  *
2318  */
2319 void
2320 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
2321                           struct megasas_cmd *cmd)
2322 {
2323         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2324
2325         req_desc = build_mpt_cmd(instance, cmd);
2326         if (!req_desc) {
2327                 printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
2328                 return;
2329         }
2330         atomic_set(&cmd->mfi_mpt_pthr, MFI_MPT_ATTACHED);
2331         instance->instancet->fire_cmd(instance, req_desc->u.low,
2332                                       req_desc->u.high, instance->reg_set);
2333 }
2334
2335 /**
2336  * megasas_release_fusion -     Reverses the FW initialization
2337  * @intance:                    Adapter soft state
2338  */
2339 void
2340 megasas_release_fusion(struct megasas_instance *instance)
2341 {
2342         megasas_free_cmds(instance);
2343         megasas_free_cmds_fusion(instance);
2344
2345         iounmap(instance->reg_set);
2346
2347         pci_release_selected_regions(instance->pdev, instance->bar);
2348 }
2349
2350 /**
2351  * megasas_read_fw_status_reg_fusion - returns the current FW status value
2352  * @regs:                       MFI register set
2353  */
2354 static u32
2355 megasas_read_fw_status_reg_fusion(struct megasas_register_set __iomem *regs)
2356 {
2357         return readl(&(regs)->outbound_scratch_pad);
2358 }
2359
2360 /**
2361  * megasas_alloc_host_crash_buffer -    Host buffers for Crash dump collection from Firmware
2362  * @instance:                           Controller's soft instance
2363  * return:                              Number of allocated host crash buffers
2364  */
2365 static void
2366 megasas_alloc_host_crash_buffer(struct megasas_instance *instance)
2367 {
2368         unsigned int i;
2369
2370         instance->crash_buf_pages = get_order(CRASH_DMA_BUF_SIZE);
2371         for (i = 0; i < MAX_CRASH_DUMP_SIZE; i++) {
2372                 instance->crash_buf[i] = (void  *)__get_free_pages(GFP_KERNEL,
2373                                 instance->crash_buf_pages);
2374                 if (!instance->crash_buf[i]) {
2375                         dev_info(&instance->pdev->dev, "Firmware crash dump "
2376                                 "memory allocation failed at index %d\n", i);
2377                         break;
2378                 }
2379                 memset(instance->crash_buf[i], 0,
2380                         ((1 << PAGE_SHIFT) << instance->crash_buf_pages));
2381         }
2382         instance->drv_buf_alloc = i;
2383 }
2384
2385 /**
2386  * megasas_free_host_crash_buffer -     Host buffers for Crash dump collection from Firmware
2387  * @instance:                           Controller's soft instance
2388  */
2389 void
2390 megasas_free_host_crash_buffer(struct megasas_instance *instance)
2391 {
2392         unsigned int i
2393 ;
2394         for (i = 0; i < instance->drv_buf_alloc; i++) {
2395                 if (instance->crash_buf[i])
2396                         free_pages((ulong)instance->crash_buf[i],
2397                                         instance->crash_buf_pages);
2398         }
2399         instance->drv_buf_index = 0;
2400         instance->drv_buf_alloc = 0;
2401         instance->fw_crash_state = UNAVAILABLE;
2402         instance->fw_crash_buffer_size = 0;
2403 }
2404
2405 /**
2406  * megasas_adp_reset_fusion -   For controller reset
2407  * @regs:                               MFI register set
2408  */
2409 static int
2410 megasas_adp_reset_fusion(struct megasas_instance *instance,
2411                          struct megasas_register_set __iomem *regs)
2412 {
2413         return 0;
2414 }
2415
2416 /**
2417  * megasas_check_reset_fusion - For controller reset check
2418  * @regs:                               MFI register set
2419  */
2420 static int
2421 megasas_check_reset_fusion(struct megasas_instance *instance,
2422                            struct megasas_register_set __iomem *regs)
2423 {
2424         return 0;
2425 }
2426
2427 /* This function waits for outstanding commands on fusion to complete */
2428 int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
2429                                         int iotimeout, int *convert)
2430 {
2431         int i, outstanding, retval = 0, hb_seconds_missed = 0;
2432         u32 fw_state;
2433
2434         for (i = 0; i < resetwaittime; i++) {
2435                 /* Check if firmware is in fault state */
2436                 fw_state = instance->instancet->read_fw_status_reg(
2437                         instance->reg_set) & MFI_STATE_MASK;
2438                 if (fw_state == MFI_STATE_FAULT) {
2439                         printk(KERN_WARNING "megasas: Found FW in FAULT state,"
2440                                " will reset adapter scsi%d.\n",
2441                                 instance->host->host_no);
2442                         retval = 1;
2443                         goto out;
2444                 }
2445                 /* If SR-IOV VF mode & heartbeat timeout, don't wait */
2446                 if (instance->requestorId && !iotimeout) {
2447                         retval = 1;
2448                         goto out;
2449                 }
2450
2451                 /* If SR-IOV VF mode & I/O timeout, check for HB timeout */
2452                 if (instance->requestorId && iotimeout) {
2453                         if (instance->hb_host_mem->HB.fwCounter !=
2454                             instance->hb_host_mem->HB.driverCounter) {
2455                                 instance->hb_host_mem->HB.driverCounter =
2456                                         instance->hb_host_mem->HB.fwCounter;
2457                                 hb_seconds_missed = 0;
2458                         } else {
2459                                 hb_seconds_missed++;
2460                                 if (hb_seconds_missed ==
2461                                     (MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF/HZ)) {
2462                                         printk(KERN_WARNING "megasas: SR-IOV:"
2463                                                " Heartbeat never completed "
2464                                                " while polling during I/O "
2465                                                " timeout handling for "
2466                                                "scsi%d.\n",
2467                                                instance->host->host_no);
2468                                                *convert = 1;
2469                                                retval = 1;
2470                                                goto out;
2471                                 }
2472                         }
2473                 }
2474
2475                 outstanding = atomic_read(&instance->fw_outstanding);
2476                 if (!outstanding)
2477                         goto out;
2478
2479                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
2480                         printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
2481                                "commands to complete for scsi%d\n", i,
2482                                outstanding, instance->host->host_no);
2483                         megasas_complete_cmd_dpc_fusion(
2484                                 (unsigned long)instance);
2485                 }
2486                 msleep(1000);
2487         }
2488
2489         if (atomic_read(&instance->fw_outstanding)) {
2490                 printk("megaraid_sas: pending commands remain after waiting, "
2491                        "will reset adapter scsi%d.\n",
2492                        instance->host->host_no);
2493                 retval = 1;
2494         }
2495 out:
2496         return retval;
2497 }
2498
2499 void  megasas_reset_reply_desc(struct megasas_instance *instance)
2500 {
2501         int i, count;
2502         struct fusion_context *fusion;
2503         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
2504
2505         fusion = instance->ctrl_context;
2506         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
2507         for (i = 0 ; i < count ; i++)
2508                 fusion->last_reply_idx[i] = 0;
2509         reply_desc = fusion->reply_frames_desc;
2510         for (i = 0 ; i < fusion->reply_q_depth * count; i++, reply_desc++)
2511                 reply_desc->Words = ULLONG_MAX;
2512 }
2513
2514 /* Check for a second path that is currently UP */
2515 int megasas_check_mpio_paths(struct megasas_instance *instance,
2516         struct scsi_cmnd *scmd)
2517 {
2518         int i, j, retval = (DID_RESET << 16);
2519
2520         if (instance->mpio && instance->requestorId) {
2521                 for (i = 0 ; i < MAX_MGMT_ADAPTERS ; i++)
2522                         for (j = 0 ; j < MAX_LOGICAL_DRIVES; j++)
2523                                 if (megasas_mgmt_info.instance[i] &&
2524                                     (megasas_mgmt_info.instance[i] != instance) &&
2525                                     megasas_mgmt_info.instance[i]->mpio &&
2526                                     megasas_mgmt_info.instance[i]->requestorId
2527                                     &&
2528                                     (megasas_mgmt_info.instance[i]->ld_ids[j]
2529                                      == scmd->device->id)) {
2530                                             retval = (DID_NO_CONNECT << 16);
2531                                             goto out;
2532                                 }
2533         }
2534 out:
2535         return retval;
2536 }
2537
2538 /* Core fusion reset function */
2539 int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
2540 {
2541         int retval = SUCCESS, i, j, retry = 0, convert = 0;
2542         struct megasas_instance *instance;
2543         struct megasas_cmd_fusion *cmd_fusion;
2544         struct fusion_context *fusion;
2545         struct megasas_cmd *cmd_mfi;
2546         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2547         u32 host_diag, abs_state, status_reg, reset_adapter;
2548         u32 io_timeout_in_crash_mode = 0;
2549
2550         instance = (struct megasas_instance *)shost->hostdata;
2551         fusion = instance->ctrl_context;
2552
2553         mutex_lock(&instance->reset_mutex);
2554
2555         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2556                 printk(KERN_WARNING "megaraid_sas: Hardware critical error, "
2557                        "returning FAILED for scsi%d.\n",
2558                         instance->host->host_no);
2559                 mutex_unlock(&instance->reset_mutex);
2560                 return FAILED;
2561         }
2562         status_reg = instance->instancet->read_fw_status_reg(instance->reg_set);
2563         abs_state = status_reg & MFI_STATE_MASK;
2564
2565         /* IO timeout detected, forcibly put FW in FAULT state */
2566         if (abs_state != MFI_STATE_FAULT && instance->crash_dump_buf &&
2567                 instance->crash_dump_app_support && iotimeout) {
2568                 dev_info(&instance->pdev->dev, "IO timeout is detected, "
2569                         "forcibly FAULT Firmware\n");
2570                 instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
2571                 status_reg = readl(&instance->reg_set->doorbell);
2572                 writel(status_reg | MFI_STATE_FORCE_OCR,
2573                         &instance->reg_set->doorbell);
2574                 readl(&instance->reg_set->doorbell);
2575                 mutex_unlock(&instance->reset_mutex);
2576                 do {
2577                         ssleep(3);
2578                         io_timeout_in_crash_mode++;
2579                         dev_dbg(&instance->pdev->dev, "waiting for [%d] "
2580                                 "seconds for crash dump collection and OCR "
2581                                 "to be done\n", (io_timeout_in_crash_mode * 3));
2582                 } while ((instance->adprecovery != MEGASAS_HBA_OPERATIONAL) &&
2583                         (io_timeout_in_crash_mode < 80));
2584
2585                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
2586                         dev_info(&instance->pdev->dev, "OCR done for IO "
2587                                 "timeout case\n");
2588                         retval = SUCCESS;
2589                 } else {
2590                         dev_info(&instance->pdev->dev, "Controller is not "
2591                                 "operational after 240 seconds wait for IO "
2592                                 "timeout case in FW crash dump mode\n do "
2593                                 "OCR/kill adapter\n");
2594                         retval = megasas_reset_fusion(shost, 0);
2595                 }
2596                 return retval;
2597         }
2598
2599         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
2600                 del_timer_sync(&instance->sriov_heartbeat_timer);
2601         set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2602         instance->adprecovery = MEGASAS_ADPRESET_SM_POLLING;
2603         instance->instancet->disable_intr(instance);
2604         msleep(1000);
2605
2606         /* First try waiting for commands to complete */
2607         if (megasas_wait_for_outstanding_fusion(instance, iotimeout,
2608                                                 &convert)) {
2609                 instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
2610                 printk(KERN_WARNING "megaraid_sas: resetting fusion "
2611                        "adapter scsi%d.\n", instance->host->host_no);
2612                 if (convert)
2613                         iotimeout = 0;
2614
2615                 /* Now return commands back to the OS */
2616                 for (i = 0 ; i < instance->max_fw_cmds; i++) {
2617                         cmd_fusion = fusion->cmd_list[i];
2618                         if (cmd_fusion->scmd) {
2619                                 scsi_dma_unmap(cmd_fusion->scmd);
2620                                 cmd_fusion->scmd->result =
2621                                         megasas_check_mpio_paths(instance,
2622                                                                  cmd_fusion->scmd);
2623                                 cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
2624                                 megasas_return_cmd_fusion(instance, cmd_fusion);
2625                                 atomic_dec(&instance->fw_outstanding);
2626                         }
2627                 }
2628
2629                 status_reg = instance->instancet->read_fw_status_reg(
2630                         instance->reg_set);
2631                 abs_state = status_reg & MFI_STATE_MASK;
2632                 reset_adapter = status_reg & MFI_RESET_ADAPTER;
2633                 if (instance->disableOnlineCtrlReset ||
2634                     (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
2635                         /* Reset not supported, kill adapter */
2636                         printk(KERN_WARNING "megaraid_sas: Reset not supported"
2637                                ", killing adapter scsi%d.\n",
2638                                 instance->host->host_no);
2639                         megaraid_sas_kill_hba(instance);
2640                         instance->skip_heartbeat_timer_del = 1;
2641                         retval = FAILED;
2642                         goto out;
2643                 }
2644
2645                 /* Let SR-IOV VF & PF sync up if there was a HB failure */
2646                 if (instance->requestorId && !iotimeout) {
2647                         msleep(MEGASAS_OCR_SETTLE_TIME_VF);
2648                         /* Look for a late HB update after VF settle time */
2649                         if (abs_state == MFI_STATE_OPERATIONAL &&
2650                             (instance->hb_host_mem->HB.fwCounter !=
2651                              instance->hb_host_mem->HB.driverCounter)) {
2652                                         instance->hb_host_mem->HB.driverCounter =
2653                                                 instance->hb_host_mem->HB.fwCounter;
2654                                         printk(KERN_WARNING "megasas: SR-IOV:"
2655                                                "Late FW heartbeat update for "
2656                                                "scsi%d.\n",
2657                                                instance->host->host_no);
2658                         } else {
2659                                 /* In VF mode, first poll for FW ready */
2660                                 for (i = 0;
2661                                      i < (MEGASAS_RESET_WAIT_TIME * 1000);
2662                                      i += 20) {
2663                                         status_reg =
2664                                                 instance->instancet->
2665                                                 read_fw_status_reg(
2666                                                         instance->reg_set);
2667                                         abs_state = status_reg &
2668                                                 MFI_STATE_MASK;
2669                                         if (abs_state == MFI_STATE_READY) {
2670                                                 printk(KERN_WARNING "megasas"
2671                                                        ": SR-IOV: FW was found"
2672                                                        "to be in ready state "
2673                                                        "for scsi%d.\n",
2674                                                        instance->host->host_no);
2675                                                 break;
2676                                         }
2677                                         msleep(20);
2678                                 }
2679                                 if (abs_state != MFI_STATE_READY) {
2680                                         printk(KERN_WARNING "megasas: SR-IOV: "
2681                                                "FW not in ready state after %d"
2682                                                " seconds for scsi%d, status_reg = "
2683                                                "0x%x.\n",
2684                                                MEGASAS_RESET_WAIT_TIME,
2685                                                instance->host->host_no,
2686                                                status_reg);
2687                                         megaraid_sas_kill_hba(instance);
2688                                         instance->skip_heartbeat_timer_del = 1;
2689                                         instance->adprecovery =
2690                                                 MEGASAS_HW_CRITICAL_ERROR;
2691                                         retval = FAILED;
2692                                         goto out;
2693                                 }
2694                         }
2695                 }
2696
2697                 /* Now try to reset the chip */
2698                 for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
2699                         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE,
2700                                &instance->reg_set->fusion_seq_offset);
2701                         writel(MPI2_WRSEQ_1ST_KEY_VALUE,
2702                                &instance->reg_set->fusion_seq_offset);
2703                         writel(MPI2_WRSEQ_2ND_KEY_VALUE,
2704                                &instance->reg_set->fusion_seq_offset);
2705                         writel(MPI2_WRSEQ_3RD_KEY_VALUE,
2706                                &instance->reg_set->fusion_seq_offset);
2707                         writel(MPI2_WRSEQ_4TH_KEY_VALUE,
2708                                &instance->reg_set->fusion_seq_offset);
2709                         writel(MPI2_WRSEQ_5TH_KEY_VALUE,
2710                                &instance->reg_set->fusion_seq_offset);
2711                         writel(MPI2_WRSEQ_6TH_KEY_VALUE,
2712                                &instance->reg_set->fusion_seq_offset);
2713
2714                         /* Check that the diag write enable (DRWE) bit is on */
2715                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2716                         retry = 0;
2717                         while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
2718                                 msleep(100);
2719                                 host_diag =
2720                                 readl(&instance->reg_set->fusion_host_diag);
2721                                 if (retry++ == 100) {
2722                                         printk(KERN_WARNING "megaraid_sas: "
2723                                                "Host diag unlock failed! "
2724                                                "for scsi%d\n",
2725                                                 instance->host->host_no);
2726                                         break;
2727                                 }
2728                         }
2729                         if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
2730                                 continue;
2731
2732                         /* Send chip reset command */
2733                         writel(host_diag | HOST_DIAG_RESET_ADAPTER,
2734                                &instance->reg_set->fusion_host_diag);
2735                         msleep(3000);
2736
2737                         /* Make sure reset adapter bit is cleared */
2738                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2739                         retry = 0;
2740                         while (host_diag & HOST_DIAG_RESET_ADAPTER) {
2741                                 msleep(100);
2742                                 host_diag =
2743                                 readl(&instance->reg_set->fusion_host_diag);
2744                                 if (retry++ == 1000) {
2745                                         printk(KERN_WARNING "megaraid_sas: "
2746                                                "Diag reset adapter never "
2747                                                "cleared for scsi%d!\n",
2748                                                 instance->host->host_no);
2749                                         break;
2750                                 }
2751                         }
2752                         if (host_diag & HOST_DIAG_RESET_ADAPTER)
2753                                 continue;
2754
2755                         abs_state =
2756                                 instance->instancet->read_fw_status_reg(
2757                                         instance->reg_set) & MFI_STATE_MASK;
2758                         retry = 0;
2759
2760                         while ((abs_state <= MFI_STATE_FW_INIT) &&
2761                                (retry++ < 1000)) {
2762                                 msleep(100);
2763                                 abs_state =
2764                                 instance->instancet->read_fw_status_reg(
2765                                         instance->reg_set) & MFI_STATE_MASK;
2766                         }
2767                         if (abs_state <= MFI_STATE_FW_INIT) {
2768                                 printk(KERN_WARNING "megaraid_sas: firmware "
2769                                        "state < MFI_STATE_FW_INIT, state = "
2770                                        "0x%x for scsi%d\n", abs_state,
2771                                         instance->host->host_no);
2772                                 continue;
2773                         }
2774
2775                         /* Wait for FW to become ready */
2776                         if (megasas_transition_to_ready(instance, 1)) {
2777                                 printk(KERN_WARNING "megaraid_sas: Failed to "
2778                                        "transition controller to ready "
2779                                        "for scsi%d.\n",
2780                                        instance->host->host_no);
2781                                 continue;
2782                         }
2783
2784                         megasas_reset_reply_desc(instance);
2785                         if (megasas_ioc_init_fusion(instance)) {
2786                                 printk(KERN_WARNING "megaraid_sas: "
2787                                        "megasas_ioc_init_fusion() failed!"
2788                                        " for scsi%d\n",
2789                                        instance->host->host_no);
2790                                 continue;
2791                         }
2792
2793                         /* Re-fire management commands */
2794                         for (j = 0 ; j < instance->max_fw_cmds; j++) {
2795                                 cmd_fusion = fusion->cmd_list[j];
2796                                 if (cmd_fusion->sync_cmd_idx !=
2797                                     (u32)ULONG_MAX) {
2798                                         cmd_mfi =
2799                                         instance->
2800                                         cmd_list[cmd_fusion->sync_cmd_idx];
2801                                         if (cmd_mfi->frame->dcmd.opcode ==
2802                                             cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO)) {
2803                                                 megasas_return_mfi_mpt_pthr(instance, cmd_mfi, cmd_fusion);
2804                                         } else  {
2805                                                 req_desc =
2806                                                 megasas_get_request_descriptor(
2807                                                         instance,
2808                                                         cmd_mfi->context.smid
2809                                                         -1);
2810                                                 if (!req_desc) {
2811                                                         printk(KERN_WARNING
2812                                                                "req_desc NULL"
2813                                                                " for scsi%d\n",
2814                                                                 instance->host->host_no);
2815                                                         /* Return leaked MPT
2816                                                            frame */
2817                                                         megasas_return_cmd_fusion(instance, cmd_fusion);
2818                                                 } else {
2819                                                         instance->instancet->
2820                                                         fire_cmd(instance,
2821                                                                  req_desc->
2822                                                                  u.low,
2823                                                                  req_desc->
2824                                                                  u.high,
2825                                                                  instance->
2826                                                                  reg_set);
2827                                                 }
2828                                         }
2829                                 }
2830                         }
2831
2832                         if (megasas_get_ctrl_info(instance)) {
2833                                 dev_info(&instance->pdev->dev,
2834                                         "Failed from %s %d\n",
2835                                         __func__, __LINE__);
2836                                 megaraid_sas_kill_hba(instance);
2837                                 retval = FAILED;
2838                         }
2839                         /* Reset load balance info */
2840                         memset(fusion->load_balance_info, 0,
2841                                sizeof(struct LD_LOAD_BALANCE_INFO)
2842                                *MAX_LOGICAL_DRIVES_EXT);
2843
2844                         if (!megasas_get_map_info(instance))
2845                                 megasas_sync_map_info(instance);
2846
2847                         clear_bit(MEGASAS_FUSION_IN_RESET,
2848                                   &instance->reset_flags);
2849                         instance->instancet->enable_intr(instance);
2850                         instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2851
2852                         /* Restart SR-IOV heartbeat */
2853                         if (instance->requestorId) {
2854                                 if (!megasas_sriov_start_heartbeat(instance, 0))
2855                                         megasas_start_timer(instance,
2856                                                             &instance->sriov_heartbeat_timer,
2857                                                             megasas_sriov_heartbeat_handler,
2858                                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
2859                                 else
2860                                         instance->skip_heartbeat_timer_del = 1;
2861                         }
2862
2863                         /* Adapter reset completed successfully */
2864                         printk(KERN_WARNING "megaraid_sas: Reset "
2865                                "successful for scsi%d.\n",
2866                                 instance->host->host_no);
2867
2868                         if (instance->crash_dump_drv_support &&
2869                                 instance->crash_dump_app_support)
2870                                 megasas_set_crash_dump_params(instance,
2871                                         MR_CRASH_BUF_TURN_ON);
2872                         else
2873                                 megasas_set_crash_dump_params(instance,
2874                                         MR_CRASH_BUF_TURN_OFF);
2875
2876                         retval = SUCCESS;
2877                         goto out;
2878                 }
2879                 /* Reset failed, kill the adapter */
2880                 printk(KERN_WARNING "megaraid_sas: Reset failed, killing "
2881                        "adapter scsi%d.\n", instance->host->host_no);
2882                 megaraid_sas_kill_hba(instance);
2883                 instance->skip_heartbeat_timer_del = 1;
2884                 retval = FAILED;
2885         } else {
2886                 /* For VF: Restart HB timer if we didn't OCR */
2887                 if (instance->requestorId) {
2888                         megasas_start_timer(instance,
2889                                             &instance->sriov_heartbeat_timer,
2890                                             megasas_sriov_heartbeat_handler,
2891                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
2892                 }
2893                 clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2894                 instance->instancet->enable_intr(instance);
2895                 instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2896         }
2897 out:
2898         clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2899         mutex_unlock(&instance->reset_mutex);
2900         return retval;
2901 }
2902
2903 /* Fusion Crash dump collection work queue */
2904 void  megasas_fusion_crash_dump_wq(struct work_struct *work)
2905 {
2906         struct megasas_instance *instance =
2907                 container_of(work, struct megasas_instance, crash_init);
2908         u32 status_reg;
2909         u8 partial_copy = 0;
2910
2911
2912         status_reg = instance->instancet->read_fw_status_reg(instance->reg_set);
2913
2914         /*
2915          * Allocate host crash buffers to copy data from 1 MB DMA crash buffer
2916          * to host crash buffers
2917          */
2918         if (instance->drv_buf_index == 0) {
2919                 /* Buffer is already allocated for old Crash dump.
2920                  * Do OCR and do not wait for crash dump collection
2921                  */
2922                 if (instance->drv_buf_alloc) {
2923                         dev_info(&instance->pdev->dev, "earlier crash dump is "
2924                                 "not yet copied by application, ignoring this "
2925                                 "crash dump and initiating OCR\n");
2926                         status_reg |= MFI_STATE_CRASH_DUMP_DONE;
2927                         writel(status_reg,
2928                                 &instance->reg_set->outbound_scratch_pad);
2929                         readl(&instance->reg_set->outbound_scratch_pad);
2930                         return;
2931                 }
2932                 megasas_alloc_host_crash_buffer(instance);
2933                 dev_info(&instance->pdev->dev, "Number of host crash buffers "
2934                         "allocated: %d\n", instance->drv_buf_alloc);
2935         }
2936
2937         /*
2938          * Driver has allocated max buffers, which can be allocated
2939          * and FW has more crash dump data, then driver will
2940          * ignore the data.
2941          */
2942         if (instance->drv_buf_index >= (instance->drv_buf_alloc)) {
2943                 dev_info(&instance->pdev->dev, "Driver is done copying "
2944                         "the buffer: %d\n", instance->drv_buf_alloc);
2945                 status_reg |= MFI_STATE_CRASH_DUMP_DONE;
2946                 partial_copy = 1;
2947         } else {
2948                 memcpy(instance->crash_buf[instance->drv_buf_index],
2949                         instance->crash_dump_buf, CRASH_DMA_BUF_SIZE);
2950                 instance->drv_buf_index++;
2951                 status_reg &= ~MFI_STATE_DMADONE;
2952         }
2953
2954         if (status_reg & MFI_STATE_CRASH_DUMP_DONE) {
2955                 dev_info(&instance->pdev->dev, "Crash Dump is available,number "
2956                         "of copied buffers: %d\n", instance->drv_buf_index);
2957                 instance->fw_crash_buffer_size =  instance->drv_buf_index;
2958                 instance->fw_crash_state = AVAILABLE;
2959                 instance->drv_buf_index = 0;
2960                 writel(status_reg, &instance->reg_set->outbound_scratch_pad);
2961                 readl(&instance->reg_set->outbound_scratch_pad);
2962                 if (!partial_copy)
2963                         megasas_reset_fusion(instance->host, 0);
2964         } else {
2965                 writel(status_reg, &instance->reg_set->outbound_scratch_pad);
2966                 readl(&instance->reg_set->outbound_scratch_pad);
2967         }
2968 }
2969
2970
2971 /* Fusion OCR work queue */
2972 void megasas_fusion_ocr_wq(struct work_struct *work)
2973 {
2974         struct megasas_instance *instance =
2975                 container_of(work, struct megasas_instance, work_init);
2976
2977         megasas_reset_fusion(instance->host, 0);
2978 }
2979
2980 struct megasas_instance_template megasas_instance_template_fusion = {
2981         .fire_cmd = megasas_fire_cmd_fusion,
2982         .enable_intr = megasas_enable_intr_fusion,
2983         .disable_intr = megasas_disable_intr_fusion,
2984         .clear_intr = megasas_clear_intr_fusion,
2985         .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
2986         .adp_reset = megasas_adp_reset_fusion,
2987         .check_reset = megasas_check_reset_fusion,
2988         .service_isr = megasas_isr_fusion,
2989         .tasklet = megasas_complete_cmd_dpc_fusion,
2990         .init_adapter = megasas_init_adapter_fusion,
2991         .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
2992         .issue_dcmd = megasas_issue_dcmd_fusion,
2993 };