drivers/scsi/megaraid/megaraid_sas_fusion.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Linux MegaRAID driver for SAS based RAID controllers
   4  *
   5  *  Copyright (c) 2009-2013  LSI Corporation
   6  *  Copyright (c) 2013-2016  Avago Technologies
   7  *  Copyright (c) 2016-2018  Broadcom Inc.
   8  *
   9  *  FILE: megaraid_sas_fusion.c
  10  *
  11  *  Authors: Broadcom Inc.
  12  *           Sumant Patro
  13  *           Adam Radford
  14  *           Kashyap Desai <kashyap.desai@broadcom.com>
  15  *           Sumit Saxena <sumit.saxena@broadcom.com>
  16  *
  17  *  Send feedback to: megaraidlinux.pdl@broadcom.com
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/types.h>
  22 #include <linux/pci.h>
  23 #include <linux/list.h>
  24 #include <linux/moduleparam.h>
  25 #include <linux/module.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/delay.h>
  29 #include <linux/uio.h>
  30 #include <linux/uaccess.h>
  31 #include <linux/fs.h>
  32 #include <linux/compat.h>
  33 #include <linux/blkdev.h>
  34 #include <linux/mutex.h>
  35 #include <linux/poll.h>
  36 #include <linux/vmalloc.h>
  37 #include <linux/workqueue.h>
  38
  39 #include <scsi/scsi.h>
  40 #include <scsi/scsi_cmnd.h>
  41 #include <scsi/scsi_device.h>
  42 #include <scsi/scsi_host.h>
  43 #include <scsi/scsi_dbg.h>
  44 #include <linux/dmi.h>
  45
  46 #include "megaraid_sas_fusion.h"
  47 #include "megaraid_sas.h"
  48
  49
  50 extern void megasas_free_cmds(struct megasas_instance *instance);
  51 extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
  52                                            *instance);
  53 extern void
  54 megasas_complete_cmd(struct megasas_instance *instance,
  55                      struct megasas_cmd *cmd, u8 alt_status);
  56 int
  57 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
  58               int seconds);
  59
  60 void
  61 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
  62 int megasas_alloc_cmds(struct megasas_instance *instance);
  63 int
  64 megasas_clear_intr_fusion(struct megasas_instance *instance);
  65 int
  66 megasas_issue_polled(struct megasas_instance *instance,
  67                      struct megasas_cmd *cmd);
  68 void
  69 megasas_check_and_restore_queue_depth(struct megasas_instance *instance);
  70
  71 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
  72 void megaraid_sas_kill_hba(struct megasas_instance *instance);
  73
  74 extern u32 megasas_dbg_lvl;
  75 int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
  76                                   int initial);
  77 void megasas_start_timer(struct megasas_instance *instance);
  78 extern struct megasas_mgmt_info megasas_mgmt_info;
  79 extern unsigned int resetwaittime;
  80 extern unsigned int dual_qdepth_disable;
  81 static void megasas_free_rdpq_fusion(struct megasas_instance *instance);
  82 static void megasas_free_reply_fusion(struct megasas_instance *instance);
  83 static inline
  84 void megasas_configure_queue_sizes(struct megasas_instance *instance);
  85 static void megasas_fusion_crash_dump(struct megasas_instance *instance);
  86 extern u32 megasas_readl(struct megasas_instance *instance,
  87                          const volatile void __iomem *addr);
  88
  89 /**
  90  * megasas_check_same_4gb_region -      check if allocation
  91  *                                      crosses same 4GB boundary or not
  92  * @instance -                          adapter's soft instance
  93  * start_addr -                 start address of DMA allocation
  94  * size -                               size of allocation in bytes
  95  * return -                             true : allocation does not cross same
  96  *                                      4GB boundary
  97  *                                      false: allocation crosses same
  98  *                                      4GB boundary
  99  */
 100 static inline bool megasas_check_same_4gb_region
 101         (struct megasas_instance *instance, dma_addr_t start_addr, size_t size)
 102 {
 103         dma_addr_t end_addr;
 104
 105         end_addr = start_addr + size;
 106
 107         if (upper_32_bits(start_addr) != upper_32_bits(end_addr)) {
 108                 dev_err(&instance->pdev->dev,
 109                         "Failed to get same 4GB boundary: start_addr: 0x%llx end_addr: 0x%llx\n",
 110                         (unsigned long long)start_addr,
 111                         (unsigned long long)end_addr);
 112                 return false;
 113         }
 114
 115         return true;
 116 }
 117
 118 /**
 119  * megasas_enable_intr_fusion - Enables interrupts
 120  * @regs:                       MFI register set
 121  */
 122 void
 123 megasas_enable_intr_fusion(struct megasas_instance *instance)
 124 {
 125         struct megasas_register_set __iomem *regs;
 126         regs = instance->reg_set;
 127
 128         instance->mask_interrupts = 0;
 129         /* For Thunderbolt/Invader also clear intr on enable */
 130         writel(~0, &regs->outbound_intr_status);
 131         readl(&regs->outbound_intr_status);
 132
 133         writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 134
 135         /* Dummy readl to force pci flush */
 136         readl(&regs->outbound_intr_mask);
 137 }
 138
 139 /**
 140  * megasas_disable_intr_fusion - Disables interrupt
 141  * @regs:                        MFI register set
 142  */
 143 void
 144 megasas_disable_intr_fusion(struct megasas_instance *instance)
 145 {
 146         u32 mask = 0xFFFFFFFF;
 147         u32 status;
 148         struct megasas_register_set __iomem *regs;
 149         regs = instance->reg_set;
 150         instance->mask_interrupts = 1;
 151
 152         writel(mask, &regs->outbound_intr_mask);
 153         /* Dummy readl to force pci flush */
 154         status = readl(&regs->outbound_intr_mask);
 155 }
 156
 157 int
 158 megasas_clear_intr_fusion(struct megasas_instance *instance)
 159 {
 160         u32 status;
 161         struct megasas_register_set __iomem *regs;
 162         regs = instance->reg_set;
 163         /*
 164          * Check if it is our interrupt
 165          */
 166         status = megasas_readl(instance,
 167                                &regs->outbound_intr_status);
 168
 169         if (status & 1) {
 170                 writel(status, &regs->outbound_intr_status);
 171                 readl(&regs->outbound_intr_status);
 172                 return 1;
 173         }
 174         if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
 175                 return 0;
 176
 177         return 1;
 178 }
 179
 180 /**
 181  * megasas_get_cmd_fusion -     Get a command from the free pool
 182  * @instance:           Adapter soft state
 183  *
 184  * Returns a blk_tag indexed mpt frame
 185  */
 186 inline struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 187                                                   *instance, u32 blk_tag)
 188 {
 189         struct fusion_context *fusion;
 190
 191         fusion = instance->ctrl_context;
 192         return fusion->cmd_list[blk_tag];
 193 }
 194
 195 /**
 196  * megasas_return_cmd_fusion -  Return a cmd to free command pool
 197  * @instance:           Adapter soft state
 198  * @cmd:                Command packet to be returned to free command pool
 199  */
 200 inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
 201         struct megasas_cmd_fusion *cmd)
 202 {
 203         cmd->scmd = NULL;
 204         memset(cmd->io_request, 0, MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE);
 205         cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
 206         cmd->cmd_completed = false;
 207 }
 208
 209 /**
 210  * megasas_fire_cmd_fusion -    Sends command to the FW
 211  * @instance:                   Adapter soft state
 212  * @req_desc:                   64bit Request descriptor
 213  *
 214  * Perform PCI Write.
 215  */
 216
 217 static void
 218 megasas_fire_cmd_fusion(struct megasas_instance *instance,
 219                 union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc)
 220 {
 221 #if defined(writeq) && defined(CONFIG_64BIT)
 222         u64 req_data = (((u64)le32_to_cpu(req_desc->u.high) << 32) |
 223                 le32_to_cpu(req_desc->u.low));
 224
 225         writeq(req_data, &instance->reg_set->inbound_low_queue_port);
 226 #else
 227         unsigned long flags;
 228         spin_lock_irqsave(&instance->hba_lock, flags);
 229         writel(le32_to_cpu(req_desc->u.low),
 230                 &instance->reg_set->inbound_low_queue_port);
 231         writel(le32_to_cpu(req_desc->u.high),
 232                 &instance->reg_set->inbound_high_queue_port);
 233         spin_unlock_irqrestore(&instance->hba_lock, flags);
 234 #endif
 235 }
 236
 237 /**
 238  * megasas_fusion_update_can_queue -    Do all Adapter Queue depth related calculations here
 239  * @instance:                                                   Adapter soft state
 240  * fw_boot_context:                                             Whether this function called during probe or after OCR
 241  *
 242  * This function is only for fusion controllers.
 243  * Update host can queue, if firmware downgrade max supported firmware commands.
 244  * Firmware upgrade case will be skiped because underlying firmware has
 245  * more resource than exposed to the OS.
 246  *
 247  */
 248 static void
 249 megasas_fusion_update_can_queue(struct megasas_instance *instance, int fw_boot_context)
 250 {
 251         u16 cur_max_fw_cmds = 0;
 252         u16 ldio_threshold = 0;
 253         struct megasas_register_set __iomem *reg_set;
 254
 255         reg_set = instance->reg_set;
 256
 257         /* ventura FW does not fill outbound_scratch_pad_2 with queue depth */
 258         if (instance->adapter_type < VENTURA_SERIES)
 259                 cur_max_fw_cmds =
 260                 megasas_readl(instance,
 261                               &instance->reg_set->outbound_scratch_pad_2) & 0x00FFFF;
 262
 263         if (dual_qdepth_disable || !cur_max_fw_cmds)
 264                 cur_max_fw_cmds = instance->instancet->read_fw_status_reg(instance) & 0x00FFFF;
 265         else
 266                 ldio_threshold =
 267                         (instance->instancet->read_fw_status_reg(instance) & 0x00FFFF) - MEGASAS_FUSION_IOCTL_CMDS;
 268
 269         dev_info(&instance->pdev->dev,
 270                  "Current firmware supports maximum commands: %d\t LDIO threshold: %d\n",
 271                  cur_max_fw_cmds, ldio_threshold);
 272
 273         if (fw_boot_context == OCR_CONTEXT) {
 274                 cur_max_fw_cmds = cur_max_fw_cmds - 1;
 275                 if (cur_max_fw_cmds < instance->max_fw_cmds) {
 276                         instance->cur_can_queue =
 277                                 cur_max_fw_cmds - (MEGASAS_FUSION_INTERNAL_CMDS +
 278                                                 MEGASAS_FUSION_IOCTL_CMDS);
 279                         instance->host->can_queue = instance->cur_can_queue;
 280                         instance->ldio_threshold = ldio_threshold;
 281                 }
 282         } else {
 283                 instance->max_fw_cmds = cur_max_fw_cmds;
 284                 instance->ldio_threshold = ldio_threshold;
 285
 286                 if (reset_devices)
 287                         instance->max_fw_cmds = min(instance->max_fw_cmds,
 288                                                 (u16)MEGASAS_KDUMP_QUEUE_DEPTH);
 289                 /*
 290                 * Reduce the max supported cmds by 1. This is to ensure that the
 291                 * reply_q_sz (1 more than the max cmd that driver may send)
 292                 * does not exceed max cmds that the FW can support
 293                 */
 294                 instance->max_fw_cmds = instance->max_fw_cmds-1;
 295         }
 296 }
 297 /**
 298  * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
 299  * @instance:           Adapter soft state
 300  */
 301 void
 302 megasas_free_cmds_fusion(struct megasas_instance *instance)
 303 {
 304         int i;
 305         struct fusion_context *fusion = instance->ctrl_context;
 306         struct megasas_cmd_fusion *cmd;
 307
 308         if (fusion->sense)
 309                 dma_pool_free(fusion->sense_dma_pool, fusion->sense,
 310                               fusion->sense_phys_addr);
 311
 312         /* SG */
 313         if (fusion->cmd_list) {
 314                 for (i = 0; i < instance->max_mpt_cmds; i++) {
 315                         cmd = fusion->cmd_list[i];
 316                         if (cmd) {
 317                                 if (cmd->sg_frame)
 318                                         dma_pool_free(fusion->sg_dma_pool,
 319                                                       cmd->sg_frame,
 320                                                       cmd->sg_frame_phys_addr);
 321                         }
 322                         kfree(cmd);
 323                 }
 324                 kfree(fusion->cmd_list);
 325         }
 326
 327         if (fusion->sg_dma_pool) {
 328                 dma_pool_destroy(fusion->sg_dma_pool);
 329                 fusion->sg_dma_pool = NULL;
 330         }
 331         if (fusion->sense_dma_pool) {
 332                 dma_pool_destroy(fusion->sense_dma_pool);
 333                 fusion->sense_dma_pool = NULL;
 334         }
 335
 336
 337         /* Reply Frame, Desc*/
 338         if (instance->is_rdpq)
 339                 megasas_free_rdpq_fusion(instance);
 340         else
 341                 megasas_free_reply_fusion(instance);
 342
 343         /* Request Frame, Desc*/
 344         if (fusion->req_frames_desc)
 345                 dma_free_coherent(&instance->pdev->dev,
 346                         fusion->request_alloc_sz, fusion->req_frames_desc,
 347                         fusion->req_frames_desc_phys);
 348         if (fusion->io_request_frames)
 349                 dma_pool_free(fusion->io_request_frames_pool,
 350                         fusion->io_request_frames,
 351                         fusion->io_request_frames_phys);
 352         if (fusion->io_request_frames_pool) {
 353                 dma_pool_destroy(fusion->io_request_frames_pool);
 354                 fusion->io_request_frames_pool = NULL;
 355         }
 356 }
 357
 358 /**
 359  * megasas_create_sg_sense_fusion -     Creates DMA pool for cmd frames
 360  * @instance:                   Adapter soft state
 361  *
 362  */
 363 static int megasas_create_sg_sense_fusion(struct megasas_instance *instance)
 364 {
 365         int i;
 366         u16 max_cmd;
 367         struct fusion_context *fusion;
 368         struct megasas_cmd_fusion *cmd;
 369         int sense_sz;
 370         u32 offset;
 371
 372         fusion = instance->ctrl_context;
 373         max_cmd = instance->max_fw_cmds;
 374         sense_sz = instance->max_mpt_cmds * SCSI_SENSE_BUFFERSIZE;
 375
 376         fusion->sg_dma_pool =
 377                         dma_pool_create("mr_sg", &instance->pdev->dev,
 378                                 instance->max_chain_frame_sz,
 379                                 MR_DEFAULT_NVME_PAGE_SIZE, 0);
 380         /* SCSI_SENSE_BUFFERSIZE  = 96 bytes */
 381         fusion->sense_dma_pool =
 382                         dma_pool_create("mr_sense", &instance->pdev->dev,
 383                                 sense_sz, 64, 0);
 384
 385         if (!fusion->sense_dma_pool || !fusion->sg_dma_pool) {
 386                 dev_err(&instance->pdev->dev,
 387                         "Failed from %s %d\n",  __func__, __LINE__);
 388                 return -ENOMEM;
 389         }
 390
 391         fusion->sense = dma_pool_alloc(fusion->sense_dma_pool,
 392                                        GFP_KERNEL, &fusion->sense_phys_addr);
 393         if (!fusion->sense) {
 394                 dev_err(&instance->pdev->dev,
 395                         "failed from %s %d\n",  __func__, __LINE__);
 396                 return -ENOMEM;
 397         }
 398
 399         /* sense buffer, request frame and reply desc pool requires to be in
 400          * same 4 gb region. Below function will check this.
 401          * In case of failure, new pci pool will be created with updated
 402          * alignment.
 403          * Older allocation and pool will be destroyed.
 404          * Alignment will be used such a way that next allocation if success,
 405          * will always meet same 4gb region requirement.
 406          * Actual requirement is not alignment, but we need start and end of
 407          * DMA address must have same upper 32 bit address.
 408          */
 409
 410         if (!megasas_check_same_4gb_region(instance, fusion->sense_phys_addr,
 411                                            sense_sz)) {
 412                 dma_pool_free(fusion->sense_dma_pool, fusion->sense,
 413                               fusion->sense_phys_addr);
 414                 fusion->sense = NULL;
 415                 dma_pool_destroy(fusion->sense_dma_pool);
 416
 417                 fusion->sense_dma_pool =
 418                         dma_pool_create("mr_sense_align", &instance->pdev->dev,
 419                                         sense_sz, roundup_pow_of_two(sense_sz),
 420                                         0);
 421                 if (!fusion->sense_dma_pool) {
 422                         dev_err(&instance->pdev->dev,
 423                                 "Failed from %s %d\n",  __func__, __LINE__);
 424                         return -ENOMEM;
 425                 }
 426                 fusion->sense = dma_pool_alloc(fusion->sense_dma_pool,
 427                                                GFP_KERNEL,
 428                                                &fusion->sense_phys_addr);
 429                 if (!fusion->sense) {
 430                         dev_err(&instance->pdev->dev,
 431                                 "failed from %s %d\n",  __func__, __LINE__);
 432                         return -ENOMEM;
 433                 }
 434         }
 435
 436         /*
 437          * Allocate and attach a frame to each of the commands in cmd_list
 438          */
 439         for (i = 0; i < max_cmd; i++) {
 440                 cmd = fusion->cmd_list[i];
 441                 cmd->sg_frame = dma_pool_alloc(fusion->sg_dma_pool,
 442                                         GFP_KERNEL, &cmd->sg_frame_phys_addr);
 443
 444                 offset = SCSI_SENSE_BUFFERSIZE * i;
 445                 cmd->sense = (u8 *)fusion->sense + offset;
 446                 cmd->sense_phys_addr = fusion->sense_phys_addr + offset;
 447
 448                 if (!cmd->sg_frame) {
 449                         dev_err(&instance->pdev->dev,
 450                                 "Failed from %s %d\n",  __func__, __LINE__);
 451                         return -ENOMEM;
 452                 }
 453         }
 454
 455         /* create sense buffer for the raid 1/10 fp */
 456         for (i = max_cmd; i < instance->max_mpt_cmds; i++) {
 457                 cmd = fusion->cmd_list[i];
 458                 offset = SCSI_SENSE_BUFFERSIZE * i;
 459                 cmd->sense = (u8 *)fusion->sense + offset;
 460                 cmd->sense_phys_addr = fusion->sense_phys_addr + offset;
 461
 462         }
 463
 464         return 0;
 465 }
 466
 467 int
 468 megasas_alloc_cmdlist_fusion(struct megasas_instance *instance)
 469 {
 470         u32 max_mpt_cmd, i, j;
 471         struct fusion_context *fusion;
 472
 473         fusion = instance->ctrl_context;
 474
 475         max_mpt_cmd = instance->max_mpt_cmds;
 476
 477         /*
 478          * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
 479          * Allocate the dynamic array first and then allocate individual
 480          * commands.
 481          */
 482         fusion->cmd_list =
 483                 kcalloc(max_mpt_cmd, sizeof(struct megasas_cmd_fusion *),
 484                         GFP_KERNEL);
 485         if (!fusion->cmd_list) {
 486                 dev_err(&instance->pdev->dev,
 487                         "Failed from %s %d\n",  __func__, __LINE__);
 488                 return -ENOMEM;
 489         }
 490
 491         for (i = 0; i < max_mpt_cmd; i++) {
 492                 fusion->cmd_list[i] = kzalloc(sizeof(struct megasas_cmd_fusion),
 493                                               GFP_KERNEL);
 494                 if (!fusion->cmd_list[i]) {
 495                         for (j = 0; j < i; j++)
 496                                 kfree(fusion->cmd_list[j]);
 497                         kfree(fusion->cmd_list);
 498                         dev_err(&instance->pdev->dev,
 499                                 "Failed from %s %d\n",  __func__, __LINE__);
 500                         return -ENOMEM;
 501                 }
 502         }
 503
 504         return 0;
 505 }
 506 int
 507 megasas_alloc_request_fusion(struct megasas_instance *instance)
 508 {
 509         struct fusion_context *fusion;
 510
 511         fusion = instance->ctrl_context;
 512
 513 retry_alloc:
 514         fusion->io_request_frames_pool =
 515                         dma_pool_create("mr_ioreq", &instance->pdev->dev,
 516                                 fusion->io_frames_alloc_sz, 16, 0);
 517
 518         if (!fusion->io_request_frames_pool) {
 519                 dev_err(&instance->pdev->dev,
 520                         "Failed from %s %d\n",  __func__, __LINE__);
 521                 return -ENOMEM;
 522         }
 523
 524         fusion->io_request_frames =
 525                         dma_pool_alloc(fusion->io_request_frames_pool,
 526                                 GFP_KERNEL, &fusion->io_request_frames_phys);
 527         if (!fusion->io_request_frames) {
 528                 if (instance->max_fw_cmds >= (MEGASAS_REDUCE_QD_COUNT * 2)) {
 529                         instance->max_fw_cmds -= MEGASAS_REDUCE_QD_COUNT;
 530                         dma_pool_destroy(fusion->io_request_frames_pool);
 531                         megasas_configure_queue_sizes(instance);
 532                         goto retry_alloc;
 533                 } else {
 534                         dev_err(&instance->pdev->dev,
 535                                 "Failed from %s %d\n",  __func__, __LINE__);
 536                         return -ENOMEM;
 537                 }
 538         }
 539
 540         if (!megasas_check_same_4gb_region(instance,
 541                                            fusion->io_request_frames_phys,
 542                                            fusion->io_frames_alloc_sz)) {
 543                 dma_pool_free(fusion->io_request_frames_pool,
 544                               fusion->io_request_frames,
 545                               fusion->io_request_frames_phys);
 546                 fusion->io_request_frames = NULL;
 547                 dma_pool_destroy(fusion->io_request_frames_pool);
 548
 549                 fusion->io_request_frames_pool =
 550                         dma_pool_create("mr_ioreq_align",
 551                                         &instance->pdev->dev,
 552                                         fusion->io_frames_alloc_sz,
 553                                         roundup_pow_of_two(fusion->io_frames_alloc_sz),
 554                                         0);
 555
 556                 if (!fusion->io_request_frames_pool) {
 557                         dev_err(&instance->pdev->dev,
 558                                 "Failed from %s %d\n",  __func__, __LINE__);
 559                         return -ENOMEM;
 560                 }
 561
 562                 fusion->io_request_frames =
 563                         dma_pool_alloc(fusion->io_request_frames_pool,
 564                                        GFP_KERNEL,
 565                                        &fusion->io_request_frames_phys);
 566
 567                 if (!fusion->io_request_frames) {
 568                         dev_err(&instance->pdev->dev,
 569                                 "Failed from %s %d\n",  __func__, __LINE__);
 570                         return -ENOMEM;
 571                 }
 572         }
 573
 574         fusion->req_frames_desc =
 575                 dma_alloc_coherent(&instance->pdev->dev,
 576                                    fusion->request_alloc_sz,
 577                                    &fusion->req_frames_desc_phys, GFP_KERNEL);
 578         if (!fusion->req_frames_desc) {
 579                 dev_err(&instance->pdev->dev,
 580                         "Failed from %s %d\n",  __func__, __LINE__);
 581                 return -ENOMEM;
 582         }
 583
 584         return 0;
 585 }
 586
 587 int
 588 megasas_alloc_reply_fusion(struct megasas_instance *instance)
 589 {
 590         int i, count;
 591         struct fusion_context *fusion;
 592         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 593         fusion = instance->ctrl_context;
 594
 595         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 596         fusion->reply_frames_desc_pool =
 597                         dma_pool_create("mr_reply", &instance->pdev->dev,
 598                                 fusion->reply_alloc_sz * count, 16, 0);
 599
 600         if (!fusion->reply_frames_desc_pool) {
 601                 dev_err(&instance->pdev->dev,
 602                         "Failed from %s %d\n",  __func__, __LINE__);
 603                 return -ENOMEM;
 604         }
 605
 606         fusion->reply_frames_desc[0] =
 607                 dma_pool_alloc(fusion->reply_frames_desc_pool,
 608                         GFP_KERNEL, &fusion->reply_frames_desc_phys[0]);
 609         if (!fusion->reply_frames_desc[0]) {
 610                 dev_err(&instance->pdev->dev,
 611                         "Failed from %s %d\n",  __func__, __LINE__);
 612                 return -ENOMEM;
 613         }
 614
 615         if (!megasas_check_same_4gb_region(instance,
 616                                            fusion->reply_frames_desc_phys[0],
 617                                            (fusion->reply_alloc_sz * count))) {
 618                 dma_pool_free(fusion->reply_frames_desc_pool,
 619                               fusion->reply_frames_desc[0],
 620                               fusion->reply_frames_desc_phys[0]);
 621                 fusion->reply_frames_desc[0] = NULL;
 622                 dma_pool_destroy(fusion->reply_frames_desc_pool);
 623
 624                 fusion->reply_frames_desc_pool =
 625                         dma_pool_create("mr_reply_align",
 626                                         &instance->pdev->dev,
 627                                         fusion->reply_alloc_sz * count,
 628                                         roundup_pow_of_two(fusion->reply_alloc_sz * count),
 629                                         0);
 630
 631                 if (!fusion->reply_frames_desc_pool) {
 632                         dev_err(&instance->pdev->dev,
 633                                 "Failed from %s %d\n",  __func__, __LINE__);
 634                         return -ENOMEM;
 635                 }
 636
 637                 fusion->reply_frames_desc[0] =
 638                         dma_pool_alloc(fusion->reply_frames_desc_pool,
 639                                        GFP_KERNEL,
 640                                        &fusion->reply_frames_desc_phys[0]);
 641
 642                 if (!fusion->reply_frames_desc[0]) {
 643                         dev_err(&instance->pdev->dev,
 644                                 "Failed from %s %d\n",  __func__, __LINE__);
 645                         return -ENOMEM;
 646                 }
 647         }
 648
 649         reply_desc = fusion->reply_frames_desc[0];
 650         for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
 651                 reply_desc->Words = cpu_to_le64(ULLONG_MAX);
 652
 653         /* This is not a rdpq mode, but driver still populate
 654          * reply_frame_desc array to use same msix index in ISR path.
 655          */
 656         for (i = 0; i < (count - 1); i++)
 657                 fusion->reply_frames_desc[i + 1] =
 658                         fusion->reply_frames_desc[i] +
 659                         (fusion->reply_alloc_sz)/sizeof(union MPI2_REPLY_DESCRIPTORS_UNION);
 660
 661         return 0;
 662 }
 663
 664 int
 665 megasas_alloc_rdpq_fusion(struct megasas_instance *instance)
 666 {
 667         int i, j, k, msix_count;
 668         struct fusion_context *fusion;
 669         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 670         union MPI2_REPLY_DESCRIPTORS_UNION *rdpq_chunk_virt[RDPQ_MAX_CHUNK_COUNT];
 671         dma_addr_t rdpq_chunk_phys[RDPQ_MAX_CHUNK_COUNT];
 672         u8 dma_alloc_count, abs_index;
 673         u32 chunk_size, array_size, offset;
 674
 675         fusion = instance->ctrl_context;
 676         chunk_size = fusion->reply_alloc_sz * RDPQ_MAX_INDEX_IN_ONE_CHUNK;
 677         array_size = sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) *
 678                      MAX_MSIX_QUEUES_FUSION;
 679
 680         fusion->rdpq_virt = dma_alloc_coherent(&instance->pdev->dev,
 681                                                array_size, &fusion->rdpq_phys,
 682                                                GFP_KERNEL);
 683         if (!fusion->rdpq_virt) {
 684                 dev_err(&instance->pdev->dev,
 685                         "Failed from %s %d\n",  __func__, __LINE__);
 686                 return -ENOMEM;
 687         }
 688
 689         msix_count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 690
 691         fusion->reply_frames_desc_pool = dma_pool_create("mr_rdpq",
 692                                                          &instance->pdev->dev,
 693                                                          chunk_size, 16, 0);
 694         fusion->reply_frames_desc_pool_align =
 695                                 dma_pool_create("mr_rdpq_align",
 696                                                 &instance->pdev->dev,
 697                                                 chunk_size,
 698                                                 roundup_pow_of_two(chunk_size),
 699                                                 0);
 700
 701         if (!fusion->reply_frames_desc_pool ||
 702             !fusion->reply_frames_desc_pool_align) {
 703                 dev_err(&instance->pdev->dev,
 704                         "Failed from %s %d\n",  __func__, __LINE__);
 705                 return -ENOMEM;
 706         }
 707
 708 /*
 709  * For INVADER_SERIES each set of 8 reply queues(0-7, 8-15, ..) and
 710  * VENTURA_SERIES each set of 16 reply queues(0-15, 16-31, ..) should be
 711  * within 4GB boundary and also reply queues in a set must have same
 712  * upper 32-bits in their memory address. so here driver is allocating the
 713  * DMA'able memory for reply queues according. Driver uses limitation of
 714  * VENTURA_SERIES to manage INVADER_SERIES as well.
 715  */
 716         dma_alloc_count = DIV_ROUND_UP(msix_count, RDPQ_MAX_INDEX_IN_ONE_CHUNK);
 717
 718         for (i = 0; i < dma_alloc_count; i++) {
 719                 rdpq_chunk_virt[i] =
 720                         dma_pool_alloc(fusion->reply_frames_desc_pool,
 721                                        GFP_KERNEL, &rdpq_chunk_phys[i]);
 722                 if (!rdpq_chunk_virt[i]) {
 723                         dev_err(&instance->pdev->dev,
 724                                 "Failed from %s %d\n",  __func__, __LINE__);
 725                         return -ENOMEM;
 726                 }
 727                 /* reply desc pool requires to be in same 4 gb region.
 728                  * Below function will check this.
 729                  * In case of failure, new pci pool will be created with updated
 730                  * alignment.
 731                  * For RDPQ buffers, driver always allocate two separate pci pool.
 732                  * Alignment will be used such a way that next allocation if
 733                  * success, will always meet same 4gb region requirement.
 734                  * rdpq_tracker keep track of each buffer's physical,
 735                  * virtual address and pci pool descriptor. It will help driver
 736                  * while freeing the resources.
 737                  *
 738                  */
 739                 if (!megasas_check_same_4gb_region(instance, rdpq_chunk_phys[i],
 740                                                    chunk_size)) {
 741                         dma_pool_free(fusion->reply_frames_desc_pool,
 742                                       rdpq_chunk_virt[i],
 743                                       rdpq_chunk_phys[i]);
 744
 745                         rdpq_chunk_virt[i] =
 746                                 dma_pool_alloc(fusion->reply_frames_desc_pool_align,
 747                                                GFP_KERNEL, &rdpq_chunk_phys[i]);
 748                         if (!rdpq_chunk_virt[i]) {
 749                                 dev_err(&instance->pdev->dev,
 750                                         "Failed from %s %d\n",
 751                                         __func__, __LINE__);
 752                                 return -ENOMEM;
 753                         }
 754                         fusion->rdpq_tracker[i].dma_pool_ptr =
 755                                         fusion->reply_frames_desc_pool_align;
 756                 } else {
 757                         fusion->rdpq_tracker[i].dma_pool_ptr =
 758                                         fusion->reply_frames_desc_pool;
 759                 }
 760
 761                 fusion->rdpq_tracker[i].pool_entry_phys = rdpq_chunk_phys[i];
 762                 fusion->rdpq_tracker[i].pool_entry_virt = rdpq_chunk_virt[i];
 763         }
 764
 765         for (k = 0; k < dma_alloc_count; k++) {
 766                 for (i = 0; i < RDPQ_MAX_INDEX_IN_ONE_CHUNK; i++) {
 767                         abs_index = (k * RDPQ_MAX_INDEX_IN_ONE_CHUNK) + i;
 768
 769                         if (abs_index == msix_count)
 770                                 break;
 771                         offset = fusion->reply_alloc_sz * i;
 772                         fusion->rdpq_virt[abs_index].RDPQBaseAddress =
 773                                         cpu_to_le64(rdpq_chunk_phys[k] + offset);
 774                         fusion->reply_frames_desc_phys[abs_index] =
 775                                         rdpq_chunk_phys[k] + offset;
 776                         fusion->reply_frames_desc[abs_index] =
 777                                         (union MPI2_REPLY_DESCRIPTORS_UNION *)((u8 *)rdpq_chunk_virt[k] + offset);
 778
 779                         reply_desc = fusion->reply_frames_desc[abs_index];
 780                         for (j = 0; j < fusion->reply_q_depth; j++, reply_desc++)
 781                                 reply_desc->Words = ULLONG_MAX;
 782                 }
 783         }
 784
 785         return 0;
 786 }
 787
 788 static void
 789 megasas_free_rdpq_fusion(struct megasas_instance *instance) {
 790
 791         int i;
 792         struct fusion_context *fusion;
 793
 794         fusion = instance->ctrl_context;
 795
 796         for (i = 0; i < RDPQ_MAX_CHUNK_COUNT; i++) {
 797                 if (fusion->rdpq_tracker[i].pool_entry_virt)
 798                         dma_pool_free(fusion->rdpq_tracker[i].dma_pool_ptr,
 799                                       fusion->rdpq_tracker[i].pool_entry_virt,
 800                                       fusion->rdpq_tracker[i].pool_entry_phys);
 801
 802         }
 803
 804         dma_pool_destroy(fusion->reply_frames_desc_pool);
 805         dma_pool_destroy(fusion->reply_frames_desc_pool_align);
 806
 807         if (fusion->rdpq_virt)
 808                 dma_free_coherent(&instance->pdev->dev,
 809                         sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) * MAX_MSIX_QUEUES_FUSION,
 810                         fusion->rdpq_virt, fusion->rdpq_phys);
 811 }
 812
 813 static void
 814 megasas_free_reply_fusion(struct megasas_instance *instance) {
 815
 816         struct fusion_context *fusion;
 817
 818         fusion = instance->ctrl_context;
 819
 820         if (fusion->reply_frames_desc[0])
 821                 dma_pool_free(fusion->reply_frames_desc_pool,
 822                         fusion->reply_frames_desc[0],
 823                         fusion->reply_frames_desc_phys[0]);
 824
 825         dma_pool_destroy(fusion->reply_frames_desc_pool);
 826
 827 }
 828
 829
 830 /**
 831  * megasas_alloc_cmds_fusion -  Allocates the command packets
 832  * @instance:           Adapter soft state
 833  *
 834  *
 835  * Each frame has a 32-bit field called context. This context is used to get
 836  * back the megasas_cmd_fusion from the frame when a frame gets completed
 837  * In this driver, the 32 bit values are the indices into an array cmd_list.
 838  * This array is used only to look up the megasas_cmd_fusion given the context.
 839  * The free commands themselves are maintained in a linked list called cmd_pool.
 840  *
 841  * cmds are formed in the io_request and sg_frame members of the
 842  * megasas_cmd_fusion. The context field is used to get a request descriptor
 843  * and is used as SMID of the cmd.
 844  * SMID value range is from 1 to max_fw_cmds.
 845  */
 846 int
 847 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 848 {
 849         int i;
 850         struct fusion_context *fusion;
 851         struct megasas_cmd_fusion *cmd;
 852         u32 offset;
 853         dma_addr_t io_req_base_phys;
 854         u8 *io_req_base;
 855
 856
 857         fusion = instance->ctrl_context;
 858
 859         if (megasas_alloc_request_fusion(instance))
 860                 goto fail_exit;
 861
 862         if (instance->is_rdpq) {
 863                 if (megasas_alloc_rdpq_fusion(instance))
 864                         goto fail_exit;
 865         } else
 866                 if (megasas_alloc_reply_fusion(instance))
 867                         goto fail_exit;
 868
 869         if (megasas_alloc_cmdlist_fusion(instance))
 870                 goto fail_exit;
 871
 872         dev_info(&instance->pdev->dev, "Configured max firmware commands: %d\n",
 873                  instance->max_fw_cmds);
 874
 875         /* The first 256 bytes (SMID 0) is not used. Don't add to the cmd list */
 876         io_req_base = fusion->io_request_frames + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 877         io_req_base_phys = fusion->io_request_frames_phys + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 878
 879         /*
 880          * Add all the commands to command pool (fusion->cmd_pool)
 881          */
 882
 883         /* SMID 0 is reserved. Set SMID/index from 1 */
 884         for (i = 0; i < instance->max_mpt_cmds; i++) {
 885                 cmd = fusion->cmd_list[i];
 886                 offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
 887                 memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 888                 cmd->index = i + 1;
 889                 cmd->scmd = NULL;
 890                 cmd->sync_cmd_idx =
 891                 (i >= instance->max_scsi_cmds && i < instance->max_fw_cmds) ?
 892                                 (i - instance->max_scsi_cmds) :
 893                                 (u32)ULONG_MAX; /* Set to Invalid */
 894                 cmd->instance = instance;
 895                 cmd->io_request =
 896                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
 897                   (io_req_base + offset);
 898                 memset(cmd->io_request, 0,
 899                        sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 900                 cmd->io_request_phys_addr = io_req_base_phys + offset;
 901                 cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
 902         }
 903
 904         if (megasas_create_sg_sense_fusion(instance))
 905                 goto fail_exit;
 906
 907         return 0;
 908
 909 fail_exit:
 910         megasas_free_cmds_fusion(instance);
 911         return -ENOMEM;
 912 }
 913
 914 /**
 915  * wait_and_poll -      Issues a polling command
 916  * @instance:                   Adapter soft state
 917  * @cmd:                        Command packet to be issued
 918  *
 919  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
 920  */
 921 int
 922 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
 923         int seconds)
 924 {
 925         int i;
 926         struct megasas_header *frame_hdr = &cmd->frame->hdr;
 927
 928         u32 msecs = seconds * 1000;
 929
 930         /*
 931          * Wait for cmd_status to change
 932          */
 933         for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
 934                 rmb();
 935                 msleep(20);
 936         }
 937
 938         if (frame_hdr->cmd_status == MFI_STAT_INVALID_STATUS)
 939                 return DCMD_TIMEOUT;
 940         else if (frame_hdr->cmd_status == MFI_STAT_OK)
 941                 return DCMD_SUCCESS;
 942         else
 943                 return DCMD_FAILED;
 944 }
 945
 946 /**
 947  * megasas_ioc_init_fusion -    Initializes the FW
 948  * @instance:           Adapter soft state
 949  *
 950  * Issues the IOC Init cmd
 951  */
 952 int
 953 megasas_ioc_init_fusion(struct megasas_instance *instance)
 954 {
 955         struct megasas_init_frame *init_frame;
 956         struct MPI2_IOC_INIT_REQUEST *IOCInitMessage = NULL;
 957         dma_addr_t      ioc_init_handle;
 958         struct megasas_cmd *cmd;
 959         u8 ret, cur_rdpq_mode;
 960         struct fusion_context *fusion;
 961         union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
 962         int i;
 963         struct megasas_header *frame_hdr;
 964         const char *sys_info;
 965         MFI_CAPABILITIES *drv_ops;
 966         u32 scratch_pad_1;
 967         ktime_t time;
 968         bool cur_fw_64bit_dma_capable;
 969
 970         fusion = instance->ctrl_context;
 971
 972         ioc_init_handle = fusion->ioc_init_request_phys;
 973         IOCInitMessage = fusion->ioc_init_request;
 974
 975         cmd = fusion->ioc_init_cmd;
 976
 977         scratch_pad_1 = megasas_readl
 978                 (instance, &instance->reg_set->outbound_scratch_pad_1);
 979
 980         cur_rdpq_mode = (scratch_pad_1 & MR_RDPQ_MODE_OFFSET) ? 1 : 0;
 981
 982         if (instance->adapter_type == INVADER_SERIES) {
 983                 cur_fw_64bit_dma_capable =
 984                         (scratch_pad_1 & MR_CAN_HANDLE_64_BIT_DMA_OFFSET) ? true : false;
 985
 986                 if (instance->consistent_mask_64bit && !cur_fw_64bit_dma_capable) {
 987                         dev_err(&instance->pdev->dev, "Driver was operating on 64bit "
 988                                 "DMA mask, but upcoming FW does not support 64bit DMA mask\n");
 989                         megaraid_sas_kill_hba(instance);
 990                         ret = 1;
 991                         goto fail_fw_init;
 992                 }
 993         }
 994
 995         if (instance->is_rdpq && !cur_rdpq_mode) {
 996                 dev_err(&instance->pdev->dev, "Firmware downgrade *NOT SUPPORTED*"
 997                         " from RDPQ mode to non RDPQ mode\n");
 998                 ret = 1;
 999                 goto fail_fw_init;
1000         }
1001
1002         instance->fw_sync_cache_support = (scratch_pad_1 &
1003                 MR_CAN_HANDLE_SYNC_CACHE_OFFSET) ? 1 : 0;
1004         dev_info(&instance->pdev->dev, "FW supports sync cache\t: %s\n",
1005                  instance->fw_sync_cache_support ? "Yes" : "No");
1006
1007         memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
1008
1009         IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
1010         IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
1011         IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION);
1012         IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
1013         IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4);
1014
1015         IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth);
1016         IOCInitMessage->ReplyDescriptorPostQueueAddress = instance->is_rdpq ?
1017                         cpu_to_le64(fusion->rdpq_phys) :
1018                         cpu_to_le64(fusion->reply_frames_desc_phys[0]);
1019         IOCInitMessage->MsgFlags = instance->is_rdpq ?
1020                         MPI2_IOCINIT_MSGFLAG_RDPQ_ARRAY_MODE : 0;
1021         IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys);
1022         IOCInitMessage->SenseBufferAddressHigh = cpu_to_le32(upper_32_bits(fusion->sense_phys_addr));
1023         IOCInitMessage->HostMSIxVectors = instance->msix_vectors;
1024         IOCInitMessage->HostPageSize = MR_DEFAULT_NVME_PAGE_SHIFT;
1025
1026         time = ktime_get_real();
1027         /* Convert to milliseconds as per FW requirement */
1028         IOCInitMessage->TimeStamp = cpu_to_le64(ktime_to_ms(time));
1029
1030         init_frame = (struct megasas_init_frame *)cmd->frame;
1031         memset(init_frame, 0, IOC_INIT_FRAME_SIZE);
1032
1033         frame_hdr = &cmd->frame->hdr;
1034         frame_hdr->cmd_status = 0xFF;
1035         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
1036
1037         init_frame->cmd = MFI_CMD_INIT;
1038         init_frame->cmd_status = 0xFF;
1039
1040         drv_ops = (MFI_CAPABILITIES *) &(init_frame->driver_operations);
1041
1042         /* driver support Extended MSIX */
1043         if (instance->adapter_type >= INVADER_SERIES)
1044                 drv_ops->mfi_capabilities.support_additional_msix = 1;
1045         /* driver supports HA / Remote LUN over Fast Path interface */
1046         drv_ops->mfi_capabilities.support_fp_remote_lun = 1;
1047
1048         drv_ops->mfi_capabilities.support_max_255lds = 1;
1049         drv_ops->mfi_capabilities.support_ndrive_r1_lb = 1;
1050         drv_ops->mfi_capabilities.security_protocol_cmds_fw = 1;
1051
1052         if (instance->max_chain_frame_sz > MEGASAS_CHAIN_FRAME_SZ_MIN)
1053                 drv_ops->mfi_capabilities.support_ext_io_size = 1;
1054
1055         drv_ops->mfi_capabilities.support_fp_rlbypass = 1;
1056         if (!dual_qdepth_disable)
1057                 drv_ops->mfi_capabilities.support_ext_queue_depth = 1;
1058
1059         drv_ops->mfi_capabilities.support_qd_throttling = 1;
1060         drv_ops->mfi_capabilities.support_pd_map_target_id = 1;
1061         drv_ops->mfi_capabilities.support_nvme_passthru = 1;
1062         drv_ops->mfi_capabilities.support_fw_exposed_dev_list = 1;
1063
1064         if (instance->consistent_mask_64bit)
1065                 drv_ops->mfi_capabilities.support_64bit_mode = 1;
1066
1067         /* Convert capability to LE32 */
1068         cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
1069
1070         sys_info = dmi_get_system_info(DMI_PRODUCT_UUID);
1071         if (instance->system_info_buf && sys_info) {
1072                 memcpy(instance->system_info_buf->systemId, sys_info,
1073                         strlen(sys_info) > 64 ? 64 : strlen(sys_info));
1074                 instance->system_info_buf->systemIdLength =
1075                         strlen(sys_info) > 64 ? 64 : strlen(sys_info);
1076                 init_frame->system_info_lo = cpu_to_le32(lower_32_bits(instance->system_info_h));
1077                 init_frame->system_info_hi = cpu_to_le32(upper_32_bits(instance->system_info_h));
1078         }
1079
1080         init_frame->queue_info_new_phys_addr_hi =
1081                 cpu_to_le32(upper_32_bits(ioc_init_handle));
1082         init_frame->queue_info_new_phys_addr_lo =
1083                 cpu_to_le32(lower_32_bits(ioc_init_handle));
1084         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
1085
1086         req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr));
1087         req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr));
1088         req_desc.MFAIo.RequestFlags =
1089                 (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
1090                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1091
1092         /*
1093          * disable the intr before firing the init frame
1094          */
1095         instance->instancet->disable_intr(instance);
1096
1097         for (i = 0; i < (10 * 1000); i += 20) {
1098                 if (megasas_readl(instance, &instance->reg_set->doorbell) & 1)
1099                         msleep(20);
1100                 else
1101                         break;
1102         }
1103
1104         megasas_fire_cmd_fusion(instance, &req_desc);
1105
1106         wait_and_poll(instance, cmd, MFI_IO_TIMEOUT_SECS);
1107
1108         frame_hdr = &cmd->frame->hdr;
1109         if (frame_hdr->cmd_status != 0) {
1110                 ret = 1;
1111                 goto fail_fw_init;
1112         }
1113
1114         return 0;
1115
1116 fail_fw_init:
1117         dev_err(&instance->pdev->dev,
1118                 "Init cmd return status FAILED for SCSI host %d\n",
1119                 instance->host->host_no);
1120
1121         return ret;
1122 }
1123
1124 /**
1125  * megasas_sync_pd_seq_num -    JBOD SEQ MAP
1126  * @instance:           Adapter soft state
1127  * @pend:               set to 1, if it is pended jbod map.
1128  *
1129  * Issue Jbod map to the firmware. If it is pended command,
1130  * issue command and return. If it is first instance of jbod map
1131  * issue and receive command.
1132  */
1133 int
1134 megasas_sync_pd_seq_num(struct megasas_instance *instance, bool pend) {
1135         int ret = 0;
1136         u32 pd_seq_map_sz;
1137         struct megasas_cmd *cmd;
1138         struct megasas_dcmd_frame *dcmd;
1139         struct fusion_context *fusion = instance->ctrl_context;
1140         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
1141         dma_addr_t pd_seq_h;
1142
1143         pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id & 1)];
1144         pd_seq_h = fusion->pd_seq_phys[(instance->pd_seq_map_id & 1)];
1145         pd_seq_map_sz = sizeof(struct MR_PD_CFG_SEQ_NUM_SYNC) +
1146                         (sizeof(struct MR_PD_CFG_SEQ) *
1147                         (MAX_PHYSICAL_DEVICES - 1));
1148
1149         cmd = megasas_get_cmd(instance);
1150         if (!cmd) {
1151                 dev_err(&instance->pdev->dev,
1152                         "Could not get mfi cmd. Fail from %s %d\n",
1153                         __func__, __LINE__);
1154                 return -ENOMEM;
1155         }
1156
1157         dcmd = &cmd->frame->dcmd;
1158
1159         memset(pd_sync, 0, pd_seq_map_sz);
1160         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1161
1162         if (pend) {
1163                 dcmd->mbox.b[0] = MEGASAS_DCMD_MBOX_PEND_FLAG;
1164                 dcmd->flags = MFI_FRAME_DIR_WRITE;
1165                 instance->jbod_seq_cmd = cmd;
1166         } else {
1167                 dcmd->flags = MFI_FRAME_DIR_READ;
1168         }
1169
1170         dcmd->cmd = MFI_CMD_DCMD;
1171         dcmd->cmd_status = 0xFF;
1172         dcmd->sge_count = 1;
1173         dcmd->timeout = 0;
1174         dcmd->pad_0 = 0;
1175         dcmd->data_xfer_len = cpu_to_le32(pd_seq_map_sz);
1176         dcmd->opcode = cpu_to_le32(MR_DCMD_SYSTEM_PD_MAP_GET_INFO);
1177
1178         megasas_set_dma_settings(instance, dcmd, pd_seq_h, pd_seq_map_sz);
1179
1180         if (pend) {
1181                 instance->instancet->issue_dcmd(instance, cmd);
1182                 return 0;
1183         }
1184
1185         /* Below code is only for non pended DCMD */
1186         if (!instance->mask_interrupts)
1187                 ret = megasas_issue_blocked_cmd(instance, cmd,
1188                         MFI_IO_TIMEOUT_SECS);
1189         else
1190                 ret = megasas_issue_polled(instance, cmd);
1191
1192         if (le32_to_cpu(pd_sync->count) > MAX_PHYSICAL_DEVICES) {
1193                 dev_warn(&instance->pdev->dev,
1194                         "driver supports max %d JBOD, but FW reports %d\n",
1195                         MAX_PHYSICAL_DEVICES, le32_to_cpu(pd_sync->count));
1196                 ret = -EINVAL;
1197         }
1198
1199         if (ret == DCMD_TIMEOUT)
1200                 megaraid_sas_kill_hba(instance);
1201
1202         if (ret == DCMD_SUCCESS)
1203                 instance->pd_seq_map_id++;
1204
1205         megasas_return_cmd(instance, cmd);
1206         return ret;
1207 }
1208
1209 /*
1210  * megasas_get_ld_map_info -    Returns FW's ld_map structure
1211  * @instance:                           Adapter soft state
1212  * @pend:                               Pend the command or not
1213  * Issues an internal command (DCMD) to get the FW's controller PD
1214  * list structure.  This information is mainly used to find out SYSTEM
1215  * supported by the FW.
1216  * dcmd.mbox value setting for MR_DCMD_LD_MAP_GET_INFO
1217  * dcmd.mbox.b[0]       - number of LDs being sync'd
1218  * dcmd.mbox.b[1]       - 0 - complete command immediately.
1219  *                      - 1 - pend till config change
1220  * dcmd.mbox.b[2]       - 0 - supports max 64 lds and uses legacy MR_FW_RAID_MAP
1221  *                      - 1 - supports max MAX_LOGICAL_DRIVES_EXT lds and
1222  *                              uses extended struct MR_FW_RAID_MAP_EXT
1223  */
1224 static int
1225 megasas_get_ld_map_info(struct megasas_instance *instance)
1226 {
1227         int ret = 0;
1228         struct megasas_cmd *cmd;
1229         struct megasas_dcmd_frame *dcmd;
1230         void *ci;
1231         dma_addr_t ci_h = 0;
1232         u32 size_map_info;
1233         struct fusion_context *fusion;
1234
1235         cmd = megasas_get_cmd(instance);
1236
1237         if (!cmd) {
1238                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for map info\n");
1239                 return -ENOMEM;
1240         }
1241
1242         fusion = instance->ctrl_context;
1243
1244         if (!fusion) {
1245                 megasas_return_cmd(instance, cmd);
1246                 return -ENXIO;
1247         }
1248
1249         dcmd = &cmd->frame->dcmd;
1250
1251         size_map_info = fusion->current_map_sz;
1252
1253         ci = (void *) fusion->ld_map[(instance->map_id & 1)];
1254         ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
1255
1256         if (!ci) {
1257                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to alloc mem for ld_map_info\n");
1258                 megasas_return_cmd(instance, cmd);
1259                 return -ENOMEM;
1260         }
1261
1262         memset(ci, 0, fusion->max_map_sz);
1263         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1264         dcmd->cmd = MFI_CMD_DCMD;
1265         dcmd->cmd_status = 0xFF;
1266         dcmd->sge_count = 1;
1267         dcmd->flags = MFI_FRAME_DIR_READ;
1268         dcmd->timeout = 0;
1269         dcmd->pad_0 = 0;
1270         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
1271         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
1272
1273         megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
1274
1275         if (!instance->mask_interrupts)
1276                 ret = megasas_issue_blocked_cmd(instance, cmd,
1277                         MFI_IO_TIMEOUT_SECS);
1278         else
1279                 ret = megasas_issue_polled(instance, cmd);
1280
1281         if (ret == DCMD_TIMEOUT)
1282                 megaraid_sas_kill_hba(instance);
1283
1284         megasas_return_cmd(instance, cmd);
1285
1286         return ret;
1287 }
1288
1289 u8
1290 megasas_get_map_info(struct megasas_instance *instance)
1291 {
1292         struct fusion_context *fusion = instance->ctrl_context;
1293
1294         fusion->fast_path_io = 0;
1295         if (!megasas_get_ld_map_info(instance)) {
1296                 if (MR_ValidateMapInfo(instance, instance->map_id)) {
1297                         fusion->fast_path_io = 1;
1298                         return 0;
1299                 }
1300         }
1301         return 1;
1302 }
1303
1304 /*
1305  * megasas_sync_map_info -      Returns FW's ld_map structure
1306  * @instance:                           Adapter soft state
1307  *
1308  * Issues an internal command (DCMD) to get the FW's controller PD
1309  * list structure.  This information is mainly used to find out SYSTEM
1310  * supported by the FW.
1311  */
1312 int
1313 megasas_sync_map_info(struct megasas_instance *instance)
1314 {
1315         int i;
1316         struct megasas_cmd *cmd;
1317         struct megasas_dcmd_frame *dcmd;
1318         u16 num_lds;
1319         struct fusion_context *fusion;
1320         struct MR_LD_TARGET_SYNC *ci = NULL;
1321         struct MR_DRV_RAID_MAP_ALL *map;
1322         struct MR_LD_RAID  *raid;
1323         struct MR_LD_TARGET_SYNC *ld_sync;
1324         dma_addr_t ci_h = 0;
1325         u32 size_map_info;
1326
1327         cmd = megasas_get_cmd(instance);
1328
1329         if (!cmd) {
1330                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for sync info\n");
1331                 return -ENOMEM;
1332         }
1333
1334         fusion = instance->ctrl_context;
1335
1336         if (!fusion) {
1337                 megasas_return_cmd(instance, cmd);
1338                 return 1;
1339         }
1340
1341         map = fusion->ld_drv_map[instance->map_id & 1];
1342
1343         num_lds = le16_to_cpu(map->raidMap.ldCount);
1344
1345         dcmd = &cmd->frame->dcmd;
1346
1347         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1348
1349         ci = (struct MR_LD_TARGET_SYNC *)
1350           fusion->ld_map[(instance->map_id - 1) & 1];
1351         memset(ci, 0, fusion->max_map_sz);
1352
1353         ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
1354
1355         ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
1356
1357         for (i = 0; i < num_lds; i++, ld_sync++) {
1358                 raid = MR_LdRaidGet(i, map);
1359                 ld_sync->targetId = MR_GetLDTgtId(i, map);
1360                 ld_sync->seqNum = raid->seqNum;
1361         }
1362
1363         size_map_info = fusion->current_map_sz;
1364
1365         dcmd->cmd = MFI_CMD_DCMD;
1366         dcmd->cmd_status = 0xFF;
1367         dcmd->sge_count = 1;
1368         dcmd->flags = MFI_FRAME_DIR_WRITE;
1369         dcmd->timeout = 0;
1370         dcmd->pad_0 = 0;
1371         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
1372         dcmd->mbox.b[0] = num_lds;
1373         dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
1374         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
1375
1376         megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
1377
1378         instance->map_update_cmd = cmd;
1379
1380         instance->instancet->issue_dcmd(instance, cmd);
1381
1382         return 0;
1383 }
1384
1385 /*
1386  * meagasas_display_intel_branding - Display branding string
1387  * @instance: per adapter object
1388  *
1389  * Return nothing.
1390  */
1391 static void
1392 megasas_display_intel_branding(struct megasas_instance *instance)
1393 {
1394         if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL)
1395                 return;
1396
1397         switch (instance->pdev->device) {
1398         case PCI_DEVICE_ID_LSI_INVADER:
1399                 switch (instance->pdev->subsystem_device) {
1400                 case MEGARAID_INTEL_RS3DC080_SSDID:
1401                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1402                                 instance->host->host_no,
1403                                 MEGARAID_INTEL_RS3DC080_BRANDING);
1404                         break;
1405                 case MEGARAID_INTEL_RS3DC040_SSDID:
1406                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1407                                 instance->host->host_no,
1408                                 MEGARAID_INTEL_RS3DC040_BRANDING);
1409                         break;
1410                 case MEGARAID_INTEL_RS3SC008_SSDID:
1411                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1412                                 instance->host->host_no,
1413                                 MEGARAID_INTEL_RS3SC008_BRANDING);
1414                         break;
1415                 case MEGARAID_INTEL_RS3MC044_SSDID:
1416                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1417                                 instance->host->host_no,
1418                                 MEGARAID_INTEL_RS3MC044_BRANDING);
1419                         break;
1420                 default:
1421                         break;
1422                 }
1423                 break;
1424         case PCI_DEVICE_ID_LSI_FURY:
1425                 switch (instance->pdev->subsystem_device) {
1426                 case MEGARAID_INTEL_RS3WC080_SSDID:
1427                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1428                                 instance->host->host_no,
1429                                 MEGARAID_INTEL_RS3WC080_BRANDING);
1430                         break;
1431                 case MEGARAID_INTEL_RS3WC040_SSDID:
1432                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1433                                 instance->host->host_no,
1434                                 MEGARAID_INTEL_RS3WC040_BRANDING);
1435                         break;
1436                 default:
1437                         break;
1438                 }
1439                 break;
1440         case PCI_DEVICE_ID_LSI_CUTLASS_52:
1441         case PCI_DEVICE_ID_LSI_CUTLASS_53:
1442                 switch (instance->pdev->subsystem_device) {
1443                 case MEGARAID_INTEL_RMS3BC160_SSDID:
1444                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1445                                 instance->host->host_no,
1446                                 MEGARAID_INTEL_RMS3BC160_BRANDING);
1447                         break;
1448                 default:
1449                         break;
1450                 }
1451                 break;
1452         default:
1453                 break;
1454         }
1455 }
1456
1457 /**
1458  * megasas_allocate_raid_maps - Allocate memory for RAID maps
1459  * @instance:                           Adapter soft state
1460  *
1461  * return:                              if success: return 0
1462  *                                      failed:  return -ENOMEM
1463  */
1464 static inline int megasas_allocate_raid_maps(struct megasas_instance *instance)
1465 {
1466         struct fusion_context *fusion;
1467         int i = 0;
1468
1469         fusion = instance->ctrl_context;
1470
1471         fusion->drv_map_pages = get_order(fusion->drv_map_sz);
1472
1473         for (i = 0; i < 2; i++) {
1474                 fusion->ld_map[i] = NULL;
1475
1476                 fusion->ld_drv_map[i] = (void *)
1477                         __get_free_pages(__GFP_ZERO | GFP_KERNEL,
1478                                          fusion->drv_map_pages);
1479
1480                 if (!fusion->ld_drv_map[i]) {
1481                         fusion->ld_drv_map[i] = vzalloc(fusion->drv_map_sz);
1482
1483                         if (!fusion->ld_drv_map[i]) {
1484                                 dev_err(&instance->pdev->dev,
1485                                         "Could not allocate memory for local map"
1486                                         " size requested: %d\n",
1487                                         fusion->drv_map_sz);
1488                                 goto ld_drv_map_alloc_fail;
1489                         }
1490                 }
1491         }
1492
1493         for (i = 0; i < 2; i++) {
1494                 fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
1495                                                        fusion->max_map_sz,
1496                                                        &fusion->ld_map_phys[i],
1497                                                        GFP_KERNEL);
1498                 if (!fusion->ld_map[i]) {
1499                         dev_err(&instance->pdev->dev,
1500                                 "Could not allocate memory for map info %s:%d\n",
1501                                 __func__, __LINE__);
1502                         goto ld_map_alloc_fail;
1503                 }
1504         }
1505
1506         return 0;
1507
1508 ld_map_alloc_fail:
1509         for (i = 0; i < 2; i++) {
1510                 if (fusion->ld_map[i])
1511                         dma_free_coherent(&instance->pdev->dev,
1512                                           fusion->max_map_sz,
1513                                           fusion->ld_map[i],
1514                                           fusion->ld_map_phys[i]);
1515         }
1516
1517 ld_drv_map_alloc_fail:
1518         for (i = 0; i < 2; i++) {
1519                 if (fusion->ld_drv_map[i]) {
1520                         if (is_vmalloc_addr(fusion->ld_drv_map[i]))
1521                                 vfree(fusion->ld_drv_map[i]);
1522                         else
1523                                 free_pages((ulong)fusion->ld_drv_map[i],
1524                                            fusion->drv_map_pages);
1525                 }
1526         }
1527
1528         return -ENOMEM;
1529 }
1530
1531 /**
1532  * megasas_configure_queue_sizes -      Calculate size of request desc queue,
1533  *                                      reply desc queue,
1534  *                                      IO request frame queue, set can_queue.
1535  * @instance:                           Adapter soft state
1536  * @return:                             void
1537  */
1538 static inline
1539 void megasas_configure_queue_sizes(struct megasas_instance *instance)
1540 {
1541         struct fusion_context *fusion;
1542         u16 max_cmd;
1543
1544         fusion = instance->ctrl_context;
1545         max_cmd = instance->max_fw_cmds;
1546
1547         if (instance->adapter_type >= VENTURA_SERIES)
1548                 instance->max_mpt_cmds = instance->max_fw_cmds * RAID_1_PEER_CMDS;
1549         else
1550                 instance->max_mpt_cmds = instance->max_fw_cmds;
1551
1552         instance->max_scsi_cmds = instance->max_fw_cmds - instance->max_mfi_cmds;
1553         instance->cur_can_queue = instance->max_scsi_cmds;
1554         instance->host->can_queue = instance->cur_can_queue;
1555
1556         fusion->reply_q_depth = 2 * ((max_cmd + 1 + 15) / 16) * 16;
1557
1558         fusion->request_alloc_sz = sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *
1559                                           instance->max_mpt_cmds;
1560         fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION) *
1561                                         (fusion->reply_q_depth);
1562         fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
1563                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
1564                  * (instance->max_mpt_cmds + 1)); /* Extra 1 for SMID 0 */
1565 }
1566
1567 static int megasas_alloc_ioc_init_frame(struct megasas_instance *instance)
1568 {
1569         struct fusion_context *fusion;
1570         struct megasas_cmd *cmd;
1571
1572         fusion = instance->ctrl_context;
1573
1574         cmd = kzalloc(sizeof(struct megasas_cmd), GFP_KERNEL);
1575
1576         if (!cmd) {
1577                 dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
1578                         __func__, __LINE__);
1579                 return -ENOMEM;
1580         }
1581
1582         cmd->frame = dma_alloc_coherent(&instance->pdev->dev,
1583                                         IOC_INIT_FRAME_SIZE,
1584                                         &cmd->frame_phys_addr, GFP_KERNEL);
1585
1586         if (!cmd->frame) {
1587                 dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
1588                         __func__, __LINE__);
1589                 kfree(cmd);
1590                 return -ENOMEM;
1591         }
1592
1593         fusion->ioc_init_cmd = cmd;
1594         return 0;
1595 }
1596
1597 /**
1598  * megasas_free_ioc_init_cmd -  Free IOC INIT command frame
1599  * @instance:           Adapter soft state
1600  */
1601 static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance)
1602 {
1603         struct fusion_context *fusion;
1604
1605         fusion = instance->ctrl_context;
1606
1607         if (fusion->ioc_init_cmd && fusion->ioc_init_cmd->frame)
1608                 dma_free_coherent(&instance->pdev->dev,
1609                                   IOC_INIT_FRAME_SIZE,
1610                                   fusion->ioc_init_cmd->frame,
1611                                   fusion->ioc_init_cmd->frame_phys_addr);
1612
1613         kfree(fusion->ioc_init_cmd);
1614 }
1615
1616 /**
1617  * megasas_init_adapter_fusion -        Initializes the FW
1618  * @instance:           Adapter soft state
1619  *
1620  * This is the main function for initializing firmware.
1621  */
1622 u32
1623 megasas_init_adapter_fusion(struct megasas_instance *instance)
1624 {
1625         struct fusion_context *fusion;
1626         u32 scratch_pad_1;
1627         int i = 0, count;
1628
1629         fusion = instance->ctrl_context;
1630
1631         megasas_fusion_update_can_queue(instance, PROBE_CONTEXT);
1632
1633         /*
1634          * Only Driver's internal DCMDs and IOCTL DCMDs needs to have MFI frames
1635          */
1636         instance->max_mfi_cmds =
1637                 MEGASAS_FUSION_INTERNAL_CMDS + MEGASAS_FUSION_IOCTL_CMDS;
1638
1639         megasas_configure_queue_sizes(instance);
1640
1641         scratch_pad_1 = megasas_readl(instance,
1642                                       &instance->reg_set->outbound_scratch_pad_1);
1643         /* If scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK is set,
1644          * Firmware support extended IO chain frame which is 4 times more than
1645          * legacy Firmware.
1646          * Legacy Firmware - Frame size is (8 * 128) = 1K
1647          * 1M IO Firmware  - Frame size is (8 * 128 * 4)  = 4K
1648          */
1649         if (scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK)
1650                 instance->max_chain_frame_sz =
1651                         ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
1652                         MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_1MB_IO;
1653         else
1654                 instance->max_chain_frame_sz =
1655                         ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
1656                         MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_256K_IO;
1657
1658         if (instance->max_chain_frame_sz < MEGASAS_CHAIN_FRAME_SZ_MIN) {
1659                 dev_warn(&instance->pdev->dev, "frame size %d invalid, fall back to legacy max frame size %d\n",
1660                         instance->max_chain_frame_sz,
1661                         MEGASAS_CHAIN_FRAME_SZ_MIN);
1662                 instance->max_chain_frame_sz = MEGASAS_CHAIN_FRAME_SZ_MIN;
1663         }
1664
1665         fusion->max_sge_in_main_msg =
1666                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
1667                         - offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
1668
1669         fusion->max_sge_in_chain =
1670                 instance->max_chain_frame_sz
1671                         / sizeof(union MPI2_SGE_IO_UNION);
1672
1673         instance->max_num_sge =
1674                 rounddown_pow_of_two(fusion->max_sge_in_main_msg
1675                         + fusion->max_sge_in_chain - 2);
1676
1677         /* Used for pass thru MFI frame (DCMD) */
1678         fusion->chain_offset_mfi_pthru =
1679                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
1680
1681         fusion->chain_offset_io_request =
1682                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
1683                  sizeof(union MPI2_SGE_IO_UNION))/16;
1684
1685         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
1686         for (i = 0 ; i < count; i++)
1687                 fusion->last_reply_idx[i] = 0;
1688
1689         /*
1690          * For fusion adapters, 3 commands for IOCTL and 8 commands
1691          * for driver's internal DCMDs.
1692          */
1693         instance->max_scsi_cmds = instance->max_fw_cmds -
1694                                 (MEGASAS_FUSION_INTERNAL_CMDS +
1695                                 MEGASAS_FUSION_IOCTL_CMDS);
1696         sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS);
1697
1698         if (megasas_alloc_ioc_init_frame(instance))
1699                 return 1;
1700
1701         /*
1702          * Allocate memory for descriptors
1703          * Create a pool of commands
1704          */
1705         if (megasas_alloc_cmds(instance))
1706                 goto fail_alloc_mfi_cmds;
1707         if (megasas_alloc_cmds_fusion(instance))
1708                 goto fail_alloc_cmds;
1709
1710         if (megasas_ioc_init_fusion(instance))
1711                 goto fail_ioc_init;
1712
1713         megasas_display_intel_branding(instance);
1714         if (megasas_get_ctrl_info(instance)) {
1715                 dev_err(&instance->pdev->dev,
1716                         "Could not get controller info. Fail from %s %d\n",
1717                         __func__, __LINE__);
1718                 goto fail_ioc_init;
1719         }
1720
1721         instance->flag_ieee = 1;
1722         instance->r1_ldio_hint_default =  MR_R1_LDIO_PIGGYBACK_DEFAULT;
1723         fusion->fast_path_io = 0;
1724
1725         if (megasas_allocate_raid_maps(instance))
1726                 goto fail_ioc_init;
1727
1728         if (!megasas_get_map_info(instance))
1729                 megasas_sync_map_info(instance);
1730
1731         return 0;
1732
1733 fail_ioc_init:
1734         megasas_free_cmds_fusion(instance);
1735 fail_alloc_cmds:
1736         megasas_free_cmds(instance);
1737 fail_alloc_mfi_cmds:
1738         megasas_free_ioc_init_cmd(instance);
1739         return 1;
1740 }
1741
1742 /**
1743  * megasas_fault_detect_work    -       Worker function of
1744  *                                      FW fault handling workqueue.
1745  */
1746 static void
1747 megasas_fault_detect_work(struct work_struct *work)
1748 {
1749         struct megasas_instance *instance =
1750                 container_of(work, struct megasas_instance,
1751                              fw_fault_work.work);
1752         u32 fw_state, dma_state, status;
1753
1754         /* Check the fw state */
1755         fw_state = instance->instancet->read_fw_status_reg(instance) &
1756                         MFI_STATE_MASK;
1757
1758         if (fw_state == MFI_STATE_FAULT) {
1759                 dma_state = instance->instancet->read_fw_status_reg(instance) &
1760                                 MFI_STATE_DMADONE;
1761                 /* Start collecting crash, if DMA bit is done */
1762                 if (instance->crash_dump_drv_support &&
1763                     instance->crash_dump_app_support && dma_state) {
1764                         megasas_fusion_crash_dump(instance);
1765                 } else {
1766                         if (instance->unload == 0) {
1767                                 status = megasas_reset_fusion(instance->host, 0);
1768                                 if (status != SUCCESS) {
1769                                         dev_err(&instance->pdev->dev,
1770                                                 "Failed from %s %d, do not re-arm timer\n",
1771                                                 __func__, __LINE__);
1772                                         return;
1773                                 }
1774                         }
1775                 }
1776         }
1777
1778         if (instance->fw_fault_work_q)
1779                 queue_delayed_work(instance->fw_fault_work_q,
1780                         &instance->fw_fault_work,
1781                         msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
1782 }
1783
1784 int
1785 megasas_fusion_start_watchdog(struct megasas_instance *instance)
1786 {
1787         /* Check if the Fault WQ is already started */
1788         if (instance->fw_fault_work_q)
1789                 return SUCCESS;
1790
1791         INIT_DELAYED_WORK(&instance->fw_fault_work, megasas_fault_detect_work);
1792
1793         snprintf(instance->fault_handler_work_q_name,
1794                  sizeof(instance->fault_handler_work_q_name),
1795                  "poll_megasas%d_status", instance->host->host_no);
1796
1797         instance->fw_fault_work_q =
1798                 create_singlethread_workqueue(instance->fault_handler_work_q_name);
1799         if (!instance->fw_fault_work_q) {
1800                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
1801                         __func__, __LINE__);
1802                 return FAILED;
1803         }
1804
1805         queue_delayed_work(instance->fw_fault_work_q,
1806                            &instance->fw_fault_work,
1807                            msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
1808
1809         return SUCCESS;
1810 }
1811
1812 void
1813 megasas_fusion_stop_watchdog(struct megasas_instance *instance)
1814 {
1815         struct workqueue_struct *wq;
1816
1817         if (instance->fw_fault_work_q) {
1818                 wq = instance->fw_fault_work_q;
1819                 instance->fw_fault_work_q = NULL;
1820                 if (!cancel_delayed_work_sync(&instance->fw_fault_work))
1821                         flush_workqueue(wq);
1822                 destroy_workqueue(wq);
1823         }
1824 }
1825
1826 /**
1827  * map_cmd_status -     Maps FW cmd status to OS cmd status
1828  * @cmd :               Pointer to cmd
1829  * @status :            status of cmd returned by FW
1830  * @ext_status :        ext status of cmd returned by FW
1831  */
1832
1833 void
1834 map_cmd_status(struct fusion_context *fusion,
1835                 struct scsi_cmnd *scmd, u8 status, u8 ext_status,
1836                 u32 data_length, u8 *sense)
1837 {
1838         u8 cmd_type;
1839         int resid;
1840
1841         cmd_type = megasas_cmd_type(scmd);
1842         switch (status) {
1843
1844         case MFI_STAT_OK:
1845                 scmd->result = DID_OK << 16;
1846                 break;
1847
1848         case MFI_STAT_SCSI_IO_FAILED:
1849         case MFI_STAT_LD_INIT_IN_PROGRESS:
1850                 scmd->result = (DID_ERROR << 16) | ext_status;
1851                 break;
1852
1853         case MFI_STAT_SCSI_DONE_WITH_ERROR:
1854
1855                 scmd->result = (DID_OK << 16) | ext_status;
1856                 if (ext_status == SAM_STAT_CHECK_CONDITION) {
1857                         memset(scmd->sense_buffer, 0,
1858                                SCSI_SENSE_BUFFERSIZE);
1859                         memcpy(scmd->sense_buffer, sense,
1860                                SCSI_SENSE_BUFFERSIZE);
1861                         scmd->result |= DRIVER_SENSE << 24;
1862                 }
1863
1864                 /*
1865                  * If the  IO request is partially completed, then MR FW will
1866                  * update "io_request->DataLength" field with actual number of
1867                  * bytes transferred.Driver will set residual bytes count in
1868                  * SCSI command structure.
1869                  */
1870                 resid = (scsi_bufflen(scmd) - data_length);
1871                 scsi_set_resid(scmd, resid);
1872
1873                 if (resid &&
1874                         ((cmd_type == READ_WRITE_LDIO) ||
1875                         (cmd_type == READ_WRITE_SYSPDIO)))
1876                         scmd_printk(KERN_INFO, scmd, "BRCM Debug mfi stat 0x%x, data len"
1877                                 " requested/completed 0x%x/0x%x\n",
1878                                 status, scsi_bufflen(scmd), data_length);
1879                 break;
1880
1881         case MFI_STAT_LD_OFFLINE:
1882         case MFI_STAT_DEVICE_NOT_FOUND:
1883                 scmd->result = DID_BAD_TARGET << 16;
1884                 break;
1885         case MFI_STAT_CONFIG_SEQ_MISMATCH:
1886                 scmd->result = DID_IMM_RETRY << 16;
1887                 break;
1888         default:
1889                 scmd->result = DID_ERROR << 16;
1890                 break;
1891         }
1892 }
1893
1894 /**
1895  * megasas_is_prp_possible -
1896  * Checks if native NVMe PRPs can be built for the IO
1897  *
1898  * @instance:           Adapter soft state
1899  * @scmd:               SCSI command from the mid-layer
1900  * @sge_count:          scatter gather element count.
1901  *
1902  * Returns:             true: PRPs can be built
1903  *                      false: IEEE SGLs needs to be built
1904  */
1905 static bool
1906 megasas_is_prp_possible(struct megasas_instance *instance,
1907                         struct scsi_cmnd *scmd, int sge_count)
1908 {
1909         int i;
1910         u32 data_length = 0;
1911         struct scatterlist *sg_scmd;
1912         bool build_prp = false;
1913         u32 mr_nvme_pg_size;
1914
1915         mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
1916                                 MR_DEFAULT_NVME_PAGE_SIZE);
1917         data_length = scsi_bufflen(scmd);
1918         sg_scmd = scsi_sglist(scmd);
1919
1920         /*
1921          * NVMe uses one PRP for each page (or part of a page)
1922          * look at the data length - if 4 pages or less then IEEE is OK
1923          * if  > 5 pages then we need to build a native SGL
1924          * if > 4 and <= 5 pages, then check physical address of 1st SG entry
1925          * if this first size in the page is >= the residual beyond 4 pages
1926          * then use IEEE, otherwise use native SGL
1927          */
1928
1929         if (data_length > (mr_nvme_pg_size * 5)) {
1930                 build_prp = true;
1931         } else if ((data_length > (mr_nvme_pg_size * 4)) &&
1932                         (data_length <= (mr_nvme_pg_size * 5)))  {
1933                 /* check if 1st SG entry size is < residual beyond 4 pages */
1934                 if (sg_dma_len(sg_scmd) < (data_length - (mr_nvme_pg_size * 4)))
1935                         build_prp = true;
1936         }
1937
1938 /*
1939  * Below code detects gaps/holes in IO data buffers.
1940  * What does holes/gaps mean?
1941  * Any SGE except first one in a SGL starts at non NVME page size
1942  * aligned address OR Any SGE except last one in a SGL ends at
1943  * non NVME page size boundary.
1944  *
1945  * Driver has already informed block layer by setting boundary rules for
1946  * bio merging done at NVME page size boundary calling kernel API
1947  * blk_queue_virt_boundary inside slave_config.
1948  * Still there is possibility of IO coming with holes to driver because of
1949  * IO merging done by IO scheduler.
1950  *
1951  * With SCSI BLK MQ enabled, there will be no IO with holes as there is no
1952  * IO scheduling so no IO merging.
1953  *
1954  * With SCSI BLK MQ disabled, IO scheduler may attempt to merge IOs and
1955  * then sending IOs with holes.
1956  *
1957  * Though driver can request block layer to disable IO merging by calling-
1958  * blk_queue_flag_set(QUEUE_FLAG_NOMERGES, sdev->request_queue) but
1959  * user may tune sysfs parameter- nomerges again to 0 or 1.
1960  *
1961  * If in future IO scheduling is enabled with SCSI BLK MQ,
1962  * this algorithm to detect holes will be required in driver
1963  * for SCSI BLK MQ enabled case as well.
1964  *
1965  *
1966  */
1967         scsi_for_each_sg(scmd, sg_scmd, sge_count, i) {
1968                 if ((i != 0) && (i != (sge_count - 1))) {
1969                         if (mega_mod64(sg_dma_len(sg_scmd), mr_nvme_pg_size) ||
1970                             mega_mod64(sg_dma_address(sg_scmd),
1971                                        mr_nvme_pg_size)) {
1972                                 build_prp = false;
1973                                 atomic_inc(&instance->sge_holes_type1);
1974                                 break;
1975                         }
1976                 }
1977
1978                 if ((sge_count > 1) && (i == 0)) {
1979                         if ((mega_mod64((sg_dma_address(sg_scmd) +
1980                                         sg_dma_len(sg_scmd)),
1981                                         mr_nvme_pg_size))) {
1982                                 build_prp = false;
1983                                 atomic_inc(&instance->sge_holes_type2);
1984                                 break;
1985                         }
1986                 }
1987
1988                 if ((sge_count > 1) && (i == (sge_count - 1))) {
1989                         if (mega_mod64(sg_dma_address(sg_scmd),
1990                                        mr_nvme_pg_size)) {
1991                                 build_prp = false;
1992                                 atomic_inc(&instance->sge_holes_type3);
1993                                 break;
1994                         }
1995                 }
1996         }
1997
1998         return build_prp;
1999 }
2000
2001 /**
2002  * megasas_make_prp_nvme -
2003  * Prepare PRPs(Physical Region Page)- SGLs specific to NVMe drives only
2004  *
2005  * @instance:           Adapter soft state
2006  * @scmd:               SCSI command from the mid-layer
2007  * @sgl_ptr:            SGL to be filled in
2008  * @cmd:                Fusion command frame
2009  * @sge_count:          scatter gather element count.
2010  *
2011  * Returns:             true: PRPs are built
2012  *                      false: IEEE SGLs needs to be built
2013  */
2014 static bool
2015 megasas_make_prp_nvme(struct megasas_instance *instance, struct scsi_cmnd *scmd,
2016                       struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
2017                       struct megasas_cmd_fusion *cmd, int sge_count)
2018 {
2019         int sge_len, offset, num_prp_in_chain = 0;
2020         struct MPI25_IEEE_SGE_CHAIN64 *main_chain_element, *ptr_first_sgl;
2021         u64 *ptr_sgl;
2022         dma_addr_t ptr_sgl_phys;
2023         u64 sge_addr;
2024         u32 page_mask, page_mask_result;
2025         struct scatterlist *sg_scmd;
2026         u32 first_prp_len;
2027         bool build_prp = false;
2028         int data_len = scsi_bufflen(scmd);
2029         u32 mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
2030                                         MR_DEFAULT_NVME_PAGE_SIZE);
2031
2032         build_prp = megasas_is_prp_possible(instance, scmd, sge_count);
2033
2034         if (!build_prp)
2035                 return false;
2036
2037         /*
2038          * Nvme has a very convoluted prp format.  One prp is required
2039          * for each page or partial page. Driver need to split up OS sg_list
2040          * entries if it is longer than one page or cross a page
2041          * boundary.  Driver also have to insert a PRP list pointer entry as
2042          * the last entry in each physical page of the PRP list.
2043          *
2044          * NOTE: The first PRP "entry" is actually placed in the first
2045          * SGL entry in the main message as IEEE 64 format.  The 2nd
2046          * entry in the main message is the chain element, and the rest
2047          * of the PRP entries are built in the contiguous pcie buffer.
2048          */
2049         page_mask = mr_nvme_pg_size - 1;
2050         ptr_sgl = (u64 *)cmd->sg_frame;
2051         ptr_sgl_phys = cmd->sg_frame_phys_addr;
2052         memset(ptr_sgl, 0, instance->max_chain_frame_sz);
2053
2054         /* Build chain frame element which holds all prps except first*/
2055         main_chain_element = (struct MPI25_IEEE_SGE_CHAIN64 *)
2056             ((u8 *)sgl_ptr + sizeof(struct MPI25_IEEE_SGE_CHAIN64));
2057
2058         main_chain_element->Address = cpu_to_le64(ptr_sgl_phys);
2059         main_chain_element->NextChainOffset = 0;
2060         main_chain_element->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2061                                         IEEE_SGE_FLAGS_SYSTEM_ADDR |
2062                                         MPI26_IEEE_SGE_FLAGS_NSF_NVME_PRP;
2063
2064         /* Build first prp, sge need not to be page aligned*/
2065         ptr_first_sgl = sgl_ptr;
2066         sg_scmd = scsi_sglist(scmd);
2067         sge_addr = sg_dma_address(sg_scmd);
2068         sge_len = sg_dma_len(sg_scmd);
2069
2070         offset = (u32)(sge_addr & page_mask);
2071         first_prp_len = mr_nvme_pg_size - offset;
2072
2073         ptr_first_sgl->Address = cpu_to_le64(sge_addr);
2074         ptr_first_sgl->Length = cpu_to_le32(first_prp_len);
2075
2076         data_len -= first_prp_len;
2077
2078         if (sge_len > first_prp_len) {
2079                 sge_addr += first_prp_len;
2080                 sge_len -= first_prp_len;
2081         } else if (sge_len == first_prp_len) {
2082                 sg_scmd = sg_next(sg_scmd);
2083                 sge_addr = sg_dma_address(sg_scmd);
2084                 sge_len = sg_dma_len(sg_scmd);
2085         }
2086
2087         for (;;) {
2088                 offset = (u32)(sge_addr & page_mask);
2089
2090                 /* Put PRP pointer due to page boundary*/
2091                 page_mask_result = (uintptr_t)(ptr_sgl + 1) & page_mask;
2092                 if (unlikely(!page_mask_result)) {
2093                         scmd_printk(KERN_NOTICE,
2094                                     scmd, "page boundary ptr_sgl: 0x%p\n",
2095                                     ptr_sgl);
2096                         ptr_sgl_phys += 8;
2097                         *ptr_sgl = cpu_to_le64(ptr_sgl_phys);
2098                         ptr_sgl++;
2099                         num_prp_in_chain++;
2100                 }
2101
2102                 *ptr_sgl = cpu_to_le64(sge_addr);
2103                 ptr_sgl++;
2104                 ptr_sgl_phys += 8;
2105                 num_prp_in_chain++;
2106
2107                 sge_addr += mr_nvme_pg_size;
2108                 sge_len -= mr_nvme_pg_size;
2109                 data_len -= mr_nvme_pg_size;
2110
2111                 if (data_len <= 0)
2112                         break;
2113
2114                 if (sge_len > 0)
2115                         continue;
2116
2117                 sg_scmd = sg_next(sg_scmd);
2118                 sge_addr = sg_dma_address(sg_scmd);
2119                 sge_len = sg_dma_len(sg_scmd);
2120         }
2121
2122         main_chain_element->Length =
2123                         cpu_to_le32(num_prp_in_chain * sizeof(u64));
2124
2125         atomic_inc(&instance->prp_sgl);
2126         return build_prp;
2127 }
2128
2129 /**
2130  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
2131  * @instance:           Adapter soft state
2132  * @scp:                SCSI command from the mid-layer
2133  * @sgl_ptr:            SGL to be filled in
2134  * @cmd:                cmd we are working on
2135  * @sge_count           sge count
2136  *
2137  */
2138 static void
2139 megasas_make_sgl_fusion(struct megasas_instance *instance,
2140                         struct scsi_cmnd *scp,
2141                         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
2142                         struct megasas_cmd_fusion *cmd, int sge_count)
2143 {
2144         int i, sg_processed;
2145         struct scatterlist *os_sgl;
2146         struct fusion_context *fusion;
2147
2148         fusion = instance->ctrl_context;
2149
2150         if (instance->adapter_type >= INVADER_SERIES) {
2151                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
2152                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
2153                 sgl_ptr_end->Flags = 0;
2154         }
2155
2156         scsi_for_each_sg(scp, os_sgl, sge_count, i) {
2157                 sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl));
2158                 sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl));
2159                 sgl_ptr->Flags = 0;
2160                 if (instance->adapter_type >= INVADER_SERIES)
2161                         if (i == sge_count - 1)
2162                                 sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
2163                 sgl_ptr++;
2164                 sg_processed = i + 1;
2165
2166                 if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
2167                     (sge_count > fusion->max_sge_in_main_msg)) {
2168
2169                         struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
2170                         if (instance->adapter_type >= INVADER_SERIES) {
2171                                 if ((le16_to_cpu(cmd->io_request->IoFlags) &
2172                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
2173                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
2174                                         cmd->io_request->ChainOffset =
2175                                                 fusion->
2176                                                 chain_offset_io_request;
2177                                 else
2178                                         cmd->io_request->ChainOffset = 0;
2179                         } else
2180                                 cmd->io_request->ChainOffset =
2181                                         fusion->chain_offset_io_request;
2182
2183                         sg_chain = sgl_ptr;
2184                         /* Prepare chain element */
2185                         sg_chain->NextChainOffset = 0;
2186                         if (instance->adapter_type >= INVADER_SERIES)
2187                                 sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
2188                         else
2189                                 sg_chain->Flags =
2190                                         (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2191                                          MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
2192                         sg_chain->Length =  cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed)));
2193                         sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr);
2194
2195                         sgl_ptr =
2196                           (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
2197                         memset(sgl_ptr, 0, instance->max_chain_frame_sz);
2198                 }
2199         }
2200         atomic_inc(&instance->ieee_sgl);
2201 }
2202
2203 /**
2204  * megasas_make_sgl -   Build Scatter Gather List(SGLs)
2205  * @scp:                SCSI command pointer
2206  * @instance:           Soft instance of controller
2207  * @cmd:                Fusion command pointer
2208  *
2209  * This function will build sgls based on device type.
2210  * For nvme drives, there is different way of building sgls in nvme native
2211  * format- PRPs(Physical Region Page).
2212  *
2213  * Returns the number of sg lists actually used, zero if the sg lists
2214  * is NULL, or -ENOMEM if the mapping failed
2215  */
2216 static
2217 int megasas_make_sgl(struct megasas_instance *instance, struct scsi_cmnd *scp,
2218                      struct megasas_cmd_fusion *cmd)
2219 {
2220         int sge_count;
2221         bool build_prp = false;
2222         struct MPI25_IEEE_SGE_CHAIN64 *sgl_chain64;
2223
2224         sge_count = scsi_dma_map(scp);
2225
2226         if ((sge_count > instance->max_num_sge) || (sge_count <= 0))
2227                 return sge_count;
2228
2229         sgl_chain64 = (struct MPI25_IEEE_SGE_CHAIN64 *)&cmd->io_request->SGL;
2230         if ((le16_to_cpu(cmd->io_request->IoFlags) &
2231             MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) &&
2232             (cmd->pd_interface == NVME_PD))
2233                 build_prp = megasas_make_prp_nvme(instance, scp, sgl_chain64,
2234                                                   cmd, sge_count);
2235
2236         if (!build_prp)
2237                 megasas_make_sgl_fusion(instance, scp, sgl_chain64,
2238                                         cmd, sge_count);
2239
2240         return sge_count;
2241 }
2242
2243 /**
2244  * megasas_set_pd_lba - Sets PD LBA
2245  * @cdb:                CDB
2246  * @cdb_len:            cdb length
2247  * @start_blk:          Start block of IO
2248  *
2249  * Used to set the PD LBA in CDB for FP IOs
2250  */
2251 void
2252 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
2253                    struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
2254                    struct MR_DRV_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
2255 {
2256         struct MR_LD_RAID *raid;
2257         u16 ld;
2258         u64 start_blk = io_info->pdBlock;
2259         u8 *cdb = io_request->CDB.CDB32;
2260         u32 num_blocks = io_info->numBlocks;
2261         u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
2262
2263         /* Check if T10 PI (DIF) is enabled for this LD */
2264         ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
2265         raid = MR_LdRaidGet(ld, local_map_ptr);
2266         if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
2267                 memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2268                 cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
2269                 cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
2270
2271                 if (scp->sc_data_direction == DMA_FROM_DEVICE)
2272                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
2273                 else
2274                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
2275                 cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
2276
2277                 /* LBA */
2278                 cdb[12] = (u8)((start_blk >> 56) & 0xff);
2279                 cdb[13] = (u8)((start_blk >> 48) & 0xff);
2280                 cdb[14] = (u8)((start_blk >> 40) & 0xff);
2281                 cdb[15] = (u8)((start_blk >> 32) & 0xff);
2282                 cdb[16] = (u8)((start_blk >> 24) & 0xff);
2283                 cdb[17] = (u8)((start_blk >> 16) & 0xff);
2284                 cdb[18] = (u8)((start_blk >> 8) & 0xff);
2285                 cdb[19] = (u8)(start_blk & 0xff);
2286
2287                 /* Logical block reference tag */
2288                 io_request->CDB.EEDP32.PrimaryReferenceTag =
2289                         cpu_to_be32(ref_tag);
2290                 io_request->CDB.EEDP32.PrimaryApplicationTagMask = cpu_to_be16(0xffff);
2291                 io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */
2292
2293                 /* Transfer length */
2294                 cdb[28] = (u8)((num_blocks >> 24) & 0xff);
2295                 cdb[29] = (u8)((num_blocks >> 16) & 0xff);
2296                 cdb[30] = (u8)((num_blocks >> 8) & 0xff);
2297                 cdb[31] = (u8)(num_blocks & 0xff);
2298
2299                 /* set SCSI IO EEDPFlags */
2300                 if (scp->sc_data_direction == DMA_FROM_DEVICE) {
2301                         io_request->EEDPFlags = cpu_to_le16(
2302                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
2303                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
2304                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
2305                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
2306                                 MPI25_SCSIIO_EEDPFLAGS_DO_NOT_DISABLE_MODE |
2307                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD);
2308                 } else {
2309                         io_request->EEDPFlags = cpu_to_le16(
2310                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
2311                                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP);
2312                 }
2313                 io_request->Control |= cpu_to_le32((0x4 << 26));
2314                 io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size);
2315         } else {
2316                 /* Some drives don't support 16/12 byte CDB's, convert to 10 */
2317                 if (((cdb_len == 12) || (cdb_len == 16)) &&
2318                     (start_blk <= 0xffffffff)) {
2319                         if (cdb_len == 16) {
2320                                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
2321                                 flagvals = cdb[1];
2322                                 groupnum = cdb[14];
2323                                 control = cdb[15];
2324                         } else {
2325                                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
2326                                 flagvals = cdb[1];
2327                                 groupnum = cdb[10];
2328                                 control = cdb[11];
2329                         }
2330
2331                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2332
2333                         cdb[0] = opcode;
2334                         cdb[1] = flagvals;
2335                         cdb[6] = groupnum;
2336                         cdb[9] = control;
2337
2338                         /* Transfer length */
2339                         cdb[8] = (u8)(num_blocks & 0xff);
2340                         cdb[7] = (u8)((num_blocks >> 8) & 0xff);
2341
2342                         io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */
2343                         cdb_len = 10;
2344                 } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
2345                         /* Convert to 16 byte CDB for large LBA's */
2346                         switch (cdb_len) {
2347                         case 6:
2348                                 opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
2349                                 control = cdb[5];
2350                                 break;
2351                         case 10:
2352                                 opcode =
2353                                         cdb[0] == READ_10 ? READ_16 : WRITE_16;
2354                                 flagvals = cdb[1];
2355                                 groupnum = cdb[6];
2356                                 control = cdb[9];
2357                                 break;
2358                         case 12:
2359                                 opcode =
2360                                         cdb[0] == READ_12 ? READ_16 : WRITE_16;
2361                                 flagvals = cdb[1];
2362                                 groupnum = cdb[10];
2363                                 control = cdb[11];
2364                                 break;
2365                         }
2366
2367                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2368
2369                         cdb[0] = opcode;
2370                         cdb[1] = flagvals;
2371                         cdb[14] = groupnum;
2372                         cdb[15] = control;
2373
2374                         /* Transfer length */
2375                         cdb[13] = (u8)(num_blocks & 0xff);
2376                         cdb[12] = (u8)((num_blocks >> 8) & 0xff);
2377                         cdb[11] = (u8)((num_blocks >> 16) & 0xff);
2378                         cdb[10] = (u8)((num_blocks >> 24) & 0xff);
2379
2380                         io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */
2381                         cdb_len = 16;
2382                 }
2383
2384                 /* Normal case, just load LBA here */
2385                 switch (cdb_len) {
2386                 case 6:
2387                 {
2388                         u8 val = cdb[1] & 0xE0;
2389                         cdb[3] = (u8)(start_blk & 0xff);
2390                         cdb[2] = (u8)((start_blk >> 8) & 0xff);
2391                         cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
2392                         break;
2393                 }
2394                 case 10:
2395                         cdb[5] = (u8)(start_blk & 0xff);
2396                         cdb[4] = (u8)((start_blk >> 8) & 0xff);
2397                         cdb[3] = (u8)((start_blk >> 16) & 0xff);
2398                         cdb[2] = (u8)((start_blk >> 24) & 0xff);
2399                         break;
2400                 case 12:
2401                         cdb[5]    = (u8)(start_blk & 0xff);
2402                         cdb[4]    = (u8)((start_blk >> 8) & 0xff);
2403                         cdb[3]    = (u8)((start_blk >> 16) & 0xff);
2404                         cdb[2]    = (u8)((start_blk >> 24) & 0xff);
2405                         break;
2406                 case 16:
2407                         cdb[9]    = (u8)(start_blk & 0xff);
2408                         cdb[8]    = (u8)((start_blk >> 8) & 0xff);
2409                         cdb[7]    = (u8)((start_blk >> 16) & 0xff);
2410                         cdb[6]    = (u8)((start_blk >> 24) & 0xff);
2411                         cdb[5]    = (u8)((start_blk >> 32) & 0xff);
2412                         cdb[4]    = (u8)((start_blk >> 40) & 0xff);
2413                         cdb[3]    = (u8)((start_blk >> 48) & 0xff);
2414                         cdb[2]    = (u8)((start_blk >> 56) & 0xff);
2415                         break;
2416                 }
2417         }
2418 }
2419
2420 /**
2421  * megasas_stream_detect -      stream detection on read and and write IOs
2422  * @instance:           Adapter soft state
2423  * @cmd:                    Command to be prepared
2424  * @io_info:            IO Request info
2425  *
2426  */
2427
2428 /** stream detection on read and and write IOs */
2429 static void megasas_stream_detect(struct megasas_instance *instance,
2430                                   struct megasas_cmd_fusion *cmd,
2431                                   struct IO_REQUEST_INFO *io_info)
2432 {
2433         struct fusion_context *fusion = instance->ctrl_context;
2434         u32 device_id = io_info->ldTgtId;
2435         struct LD_STREAM_DETECT *current_ld_sd
2436                 = fusion->stream_detect_by_ld[device_id];
2437         u32 *track_stream = &current_ld_sd->mru_bit_map, stream_num;
2438         u32 shifted_values, unshifted_values;
2439         u32 index_value_mask, shifted_values_mask;
2440         int i;
2441         bool is_read_ahead = false;
2442         struct STREAM_DETECT *current_sd;
2443         /* find possible stream */
2444         for (i = 0; i < MAX_STREAMS_TRACKED; ++i) {
2445                 stream_num = (*track_stream >>
2446                         (i * BITS_PER_INDEX_STREAM)) &
2447                         STREAM_MASK;
2448                 current_sd = &current_ld_sd->stream_track[stream_num];
2449                 /* if we found a stream, update the raid
2450                  *  context and also update the mruBitMap
2451                  */
2452                 /*      boundary condition */
2453                 if ((current_sd->next_seq_lba) &&
2454                     (io_info->ldStartBlock >= current_sd->next_seq_lba) &&
2455                     (io_info->ldStartBlock <= (current_sd->next_seq_lba + 32)) &&
2456                     (current_sd->is_read == io_info->isRead)) {
2457
2458                         if ((io_info->ldStartBlock != current_sd->next_seq_lba) &&
2459                             ((!io_info->isRead) || (!is_read_ahead)))
2460                                 /*
2461                                  * Once the API availible we need to change this.
2462                                  * At this point we are not allowing any gap
2463                                  */
2464                                 continue;
2465
2466                         SET_STREAM_DETECTED(cmd->io_request->RaidContext.raid_context_g35);
2467                         current_sd->next_seq_lba =
2468                         io_info->ldStartBlock + io_info->numBlocks;
2469                         /*
2470                          *      update the mruBitMap LRU
2471                          */
2472                         shifted_values_mask =
2473                                 (1 <<  i * BITS_PER_INDEX_STREAM) - 1;
2474                         shifted_values = ((*track_stream & shifted_values_mask)
2475                                                 << BITS_PER_INDEX_STREAM);
2476                         index_value_mask =
2477                                 STREAM_MASK << i * BITS_PER_INDEX_STREAM;
2478                         unshifted_values =
2479                                 *track_stream & ~(shifted_values_mask |
2480                                 index_value_mask);
2481                         *track_stream =
2482                                 unshifted_values | shifted_values | stream_num;
2483                         return;
2484                 }
2485         }
2486         /*
2487          * if we did not find any stream, create a new one
2488          * from the least recently used
2489          */
2490         stream_num = (*track_stream >>
2491                 ((MAX_STREAMS_TRACKED - 1) * BITS_PER_INDEX_STREAM)) &
2492                 STREAM_MASK;
2493         current_sd = &current_ld_sd->stream_track[stream_num];
2494         current_sd->is_read = io_info->isRead;
2495         current_sd->next_seq_lba = io_info->ldStartBlock + io_info->numBlocks;
2496         *track_stream = (((*track_stream & ZERO_LAST_STREAM) << 4) | stream_num);
2497         return;
2498 }
2499
2500 /**
2501  * megasas_set_raidflag_cpu_affinity - This function sets the cpu
2502  * affinity (cpu of the controller) and raid_flags in the raid context
2503  * based on IO type.
2504  *
2505  * @praid_context:      IO RAID context
2506  * @raid:               LD raid map
2507  * @fp_possible:        Is fast path possible?
2508  * @is_read:            Is read IO?
2509  *
2510  */
2511 static void
2512 megasas_set_raidflag_cpu_affinity(union RAID_CONTEXT_UNION *praid_context,
2513                                   struct MR_LD_RAID *raid, bool fp_possible,
2514                                   u8 is_read, u32 scsi_buff_len)
2515 {
2516         u8 cpu_sel = MR_RAID_CTX_CPUSEL_0;
2517         struct RAID_CONTEXT_G35 *rctx_g35;
2518
2519         rctx_g35 = &praid_context->raid_context_g35;
2520         if (fp_possible) {
2521                 if (is_read) {
2522                         if ((raid->cpuAffinity.pdRead.cpu0) &&
2523                             (raid->cpuAffinity.pdRead.cpu1))
2524                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2525                         else if (raid->cpuAffinity.pdRead.cpu1)
2526                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2527                 } else {
2528                         if ((raid->cpuAffinity.pdWrite.cpu0) &&
2529                             (raid->cpuAffinity.pdWrite.cpu1))
2530                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2531                         else if (raid->cpuAffinity.pdWrite.cpu1)
2532                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2533                         /* Fast path cache by pass capable R0/R1 VD */
2534                         if ((raid->level <= 1) &&
2535                             (raid->capability.fp_cache_bypass_capable)) {
2536                                 rctx_g35->routing_flags |=
2537                                         (1 << MR_RAID_CTX_ROUTINGFLAGS_SLD_SHIFT);
2538                                 rctx_g35->raid_flags =
2539                                         (MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS
2540                                         << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
2541                         }
2542                 }
2543         } else {
2544                 if (is_read) {
2545                         if ((raid->cpuAffinity.ldRead.cpu0) &&
2546                             (raid->cpuAffinity.ldRead.cpu1))
2547                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2548                         else if (raid->cpuAffinity.ldRead.cpu1)
2549                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2550                 } else {
2551                         if ((raid->cpuAffinity.ldWrite.cpu0) &&
2552                             (raid->cpuAffinity.ldWrite.cpu1))
2553                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2554                         else if (raid->cpuAffinity.ldWrite.cpu1)
2555                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2556
2557                         if (is_stream_detected(rctx_g35) &&
2558                             ((raid->level == 5) || (raid->level == 6)) &&
2559                             (raid->writeMode == MR_RL_WRITE_THROUGH_MODE) &&
2560                             (cpu_sel == MR_RAID_CTX_CPUSEL_FCFS))
2561                                 cpu_sel = MR_RAID_CTX_CPUSEL_0;
2562                 }
2563         }
2564
2565         rctx_g35->routing_flags |=
2566                 (cpu_sel << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
2567
2568         /* Always give priority to MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
2569          * vs MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS.
2570          * IO Subtype is not bitmap.
2571          */
2572         if ((raid->level == 1) && (!is_read)) {
2573                 if (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)
2574                         praid_context->raid_context_g35.raid_flags =
2575                                 (MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
2576                                 << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
2577         }
2578 }
2579
2580 /**
2581  * megasas_build_ldio_fusion -  Prepares IOs to devices
2582  * @instance:           Adapter soft state
2583  * @scp:                SCSI command
2584  * @cmd:                Command to be prepared
2585  *
2586  * Prepares the io_request and chain elements (sg_frame) for IO
2587  * The IO can be for PD (Fast Path) or LD
2588  */
2589 void
2590 megasas_build_ldio_fusion(struct megasas_instance *instance,
2591                           struct scsi_cmnd *scp,
2592                           struct megasas_cmd_fusion *cmd)
2593 {
2594         bool fp_possible;
2595         u16 ld;
2596         u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
2597         u32 scsi_buff_len;
2598         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
2599         struct IO_REQUEST_INFO io_info;
2600         struct fusion_context *fusion;
2601         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
2602         u8 *raidLUN;
2603         unsigned long spinlock_flags;
2604         struct MR_LD_RAID *raid = NULL;
2605         struct MR_PRIV_DEVICE *mrdev_priv;
2606         struct RAID_CONTEXT *rctx;
2607         struct RAID_CONTEXT_G35 *rctx_g35;
2608
2609         device_id = MEGASAS_DEV_INDEX(scp);
2610
2611         fusion = instance->ctrl_context;
2612
2613         io_request = cmd->io_request;
2614         rctx = &io_request->RaidContext.raid_context;
2615         rctx_g35 = &io_request->RaidContext.raid_context_g35;
2616
2617         rctx->virtual_disk_tgt_id = cpu_to_le16(device_id);
2618         rctx->status = 0;
2619         rctx->ex_status = 0;
2620
2621         start_lba_lo = 0;
2622         start_lba_hi = 0;
2623         fp_possible = false;
2624
2625         /*
2626          * 6-byte READ(0x08) or WRITE(0x0A) cdb
2627          */
2628         if (scp->cmd_len == 6) {
2629                 datalength = (u32) scp->cmnd[4];
2630                 start_lba_lo = ((u32) scp->cmnd[1] << 16) |
2631                         ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
2632
2633                 start_lba_lo &= 0x1FFFFF;
2634         }
2635
2636         /*
2637          * 10-byte READ(0x28) or WRITE(0x2A) cdb
2638          */
2639         else if (scp->cmd_len == 10) {
2640                 datalength = (u32) scp->cmnd[8] |
2641                         ((u32) scp->cmnd[7] << 8);
2642                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
2643                         ((u32) scp->cmnd[3] << 16) |
2644                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2645         }
2646
2647         /*
2648          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
2649          */
2650         else if (scp->cmd_len == 12) {
2651                 datalength = ((u32) scp->cmnd[6] << 24) |
2652                         ((u32) scp->cmnd[7] << 16) |
2653                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
2654                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
2655                         ((u32) scp->cmnd[3] << 16) |
2656                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2657         }
2658
2659         /*
2660          * 16-byte READ(0x88) or WRITE(0x8A) cdb
2661          */
2662         else if (scp->cmd_len == 16) {
2663                 datalength = ((u32) scp->cmnd[10] << 24) |
2664                         ((u32) scp->cmnd[11] << 16) |
2665                         ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
2666                 start_lba_lo = ((u32) scp->cmnd[6] << 24) |
2667                         ((u32) scp->cmnd[7] << 16) |
2668                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
2669
2670                 start_lba_hi = ((u32) scp->cmnd[2] << 24) |
2671                         ((u32) scp->cmnd[3] << 16) |
2672                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2673         }
2674
2675         memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
2676         io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
2677         io_info.numBlocks = datalength;
2678         io_info.ldTgtId = device_id;
2679         io_info.r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
2680         scsi_buff_len = scsi_bufflen(scp);
2681         io_request->DataLength = cpu_to_le32(scsi_buff_len);
2682
2683         if (scp->sc_data_direction == DMA_FROM_DEVICE)
2684                 io_info.isRead = 1;
2685
2686         local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
2687         ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
2688
2689         if (ld < instance->fw_supported_vd_count)
2690                 raid = MR_LdRaidGet(ld, local_map_ptr);
2691
2692         if (!raid || (!fusion->fast_path_io)) {
2693                 rctx->reg_lock_flags  = 0;
2694                 fp_possible = false;
2695         } else {
2696                 if (MR_BuildRaidContext(instance, &io_info, rctx,
2697                                         local_map_ptr, &raidLUN))
2698                         fp_possible = (io_info.fpOkForIo > 0) ? true : false;
2699         }
2700
2701         cmd->request_desc->SCSIIO.MSIxIndex =
2702                 instance->reply_map[raw_smp_processor_id()];
2703
2704         if (instance->adapter_type >= VENTURA_SERIES) {
2705                 /* FP for Optimal raid level 1.
2706                  * All large RAID-1 writes (> 32 KiB, both WT and WB modes)
2707                  * are built by the driver as LD I/Os.
2708                  * All small RAID-1 WT writes (<= 32 KiB) are built as FP I/Os
2709                  * (there is never a reason to process these as buffered writes)
2710                  * All small RAID-1 WB writes (<= 32 KiB) are built as FP I/Os
2711                  * with the SLD bit asserted.
2712                  */
2713                 if (io_info.r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
2714                         mrdev_priv = scp->device->hostdata;
2715
2716                         if (atomic_inc_return(&instance->fw_outstanding) >
2717                                 (instance->host->can_queue)) {
2718                                 fp_possible = false;
2719                                 atomic_dec(&instance->fw_outstanding);
2720                         } else if ((scsi_buff_len > MR_LARGE_IO_MIN_SIZE) ||
2721                                    (atomic_dec_if_positive(&mrdev_priv->r1_ldio_hint) > 0)) {
2722                                 fp_possible = false;
2723                                 atomic_dec(&instance->fw_outstanding);
2724                                 if (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)
2725                                         atomic_set(&mrdev_priv->r1_ldio_hint,
2726                                                    instance->r1_ldio_hint_default);
2727                         }
2728                 }
2729
2730                 if (!fp_possible ||
2731                     (io_info.isRead && io_info.ra_capable)) {
2732                         spin_lock_irqsave(&instance->stream_lock,
2733                                           spinlock_flags);
2734                         megasas_stream_detect(instance, cmd, &io_info);
2735                         spin_unlock_irqrestore(&instance->stream_lock,
2736                                                spinlock_flags);
2737                         /* In ventura if stream detected for a read and it is
2738                          * read ahead capable make this IO as LDIO
2739                          */
2740                         if (is_stream_detected(rctx_g35))
2741                                 fp_possible = false;
2742                 }
2743
2744                 /* If raid is NULL, set CPU affinity to default CPU0 */
2745                 if (raid)
2746                         megasas_set_raidflag_cpu_affinity(&io_request->RaidContext,
2747                                 raid, fp_possible, io_info.isRead,
2748                                 scsi_buff_len);
2749                 else
2750                         rctx_g35->routing_flags |=
2751                                 (MR_RAID_CTX_CPUSEL_0 << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
2752         }
2753
2754         if (fp_possible) {
2755                 megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
2756                                    local_map_ptr, start_lba_lo);
2757                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
2758                 cmd->request_desc->SCSIIO.RequestFlags =
2759                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO
2760                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2761                 if (instance->adapter_type == INVADER_SERIES) {
2762                         if (rctx->reg_lock_flags == REGION_TYPE_UNUSED)
2763                                 cmd->request_desc->SCSIIO.RequestFlags =
2764                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
2765                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2766                         rctx->type = MPI2_TYPE_CUDA;
2767                         rctx->nseg = 0x1;
2768                         io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
2769                         rctx->reg_lock_flags |=
2770                           (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
2771                            MR_RL_FLAGS_SEQ_NUM_ENABLE);
2772                 } else if (instance->adapter_type >= VENTURA_SERIES) {
2773                         rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
2774                         rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2775                         rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2776                         io_request->IoFlags |=
2777                                 cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
2778                 }
2779                 if (fusion->load_balance_info &&
2780                         (fusion->load_balance_info[device_id].loadBalanceFlag) &&
2781                         (io_info.isRead)) {
2782                         io_info.devHandle =
2783                                 get_updated_dev_handle(instance,
2784                                         &fusion->load_balance_info[device_id],
2785                                         &io_info, local_map_ptr);
2786                         scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
2787                         cmd->pd_r1_lb = io_info.pd_after_lb;
2788                         if (instance->adapter_type >= VENTURA_SERIES)
2789                                 rctx_g35->span_arm = io_info.span_arm;
2790                         else
2791                                 rctx->span_arm = io_info.span_arm;
2792
2793                 } else
2794                         scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
2795
2796                 if (instance->adapter_type >= VENTURA_SERIES)
2797                         cmd->r1_alt_dev_handle = io_info.r1_alt_dev_handle;
2798                 else
2799                         cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
2800
2801                 if ((raidLUN[0] == 1) &&
2802                         (local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].validHandles > 1)) {
2803                         instance->dev_handle = !(instance->dev_handle);
2804                         io_info.devHandle =
2805                                 local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].devHandle[instance->dev_handle];
2806                 }
2807
2808                 cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
2809                 io_request->DevHandle = io_info.devHandle;
2810                 cmd->pd_interface = io_info.pd_interface;
2811                 /* populate the LUN field */
2812                 memcpy(io_request->LUN, raidLUN, 8);
2813         } else {
2814                 rctx->timeout_value =
2815                         cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
2816                 cmd->request_desc->SCSIIO.RequestFlags =
2817                         (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
2818                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2819                 if (instance->adapter_type == INVADER_SERIES) {
2820                         if (io_info.do_fp_rlbypass ||
2821                         (rctx->reg_lock_flags == REGION_TYPE_UNUSED))
2822                                 cmd->request_desc->SCSIIO.RequestFlags =
2823                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
2824                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2825                         rctx->type = MPI2_TYPE_CUDA;
2826                         rctx->reg_lock_flags |=
2827                                 (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
2828                                         MR_RL_FLAGS_SEQ_NUM_ENABLE);
2829                         rctx->nseg = 0x1;
2830                 } else if (instance->adapter_type >= VENTURA_SERIES) {
2831                         rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2832                         rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
2833                         rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2834                 }
2835                 io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
2836                 io_request->DevHandle = cpu_to_le16(device_id);
2837
2838         } /* Not FP */
2839 }
2840
2841 /**
2842  * megasas_build_ld_nonrw_fusion - prepares non rw ios for virtual disk
2843  * @instance:           Adapter soft state
2844  * @scp:                SCSI command
2845  * @cmd:                Command to be prepared
2846  *
2847  * Prepares the io_request frame for non-rw io cmds for vd.
2848  */
2849 static void megasas_build_ld_nonrw_fusion(struct megasas_instance *instance,
2850                           struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd)
2851 {
2852         u32 device_id;
2853         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
2854         u16 ld;
2855         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
2856         struct fusion_context *fusion = instance->ctrl_context;
2857         u8                          span, physArm;
2858         __le16                      devHandle;
2859         u32                         arRef, pd;
2860         struct MR_LD_RAID                  *raid;
2861         struct RAID_CONTEXT                *pRAID_Context;
2862         u8 fp_possible = 1;
2863
2864         io_request = cmd->io_request;
2865         device_id = MEGASAS_DEV_INDEX(scmd);
2866         local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
2867         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
2868         /* get RAID_Context pointer */
2869         pRAID_Context = &io_request->RaidContext.raid_context;
2870         /* Check with FW team */
2871         pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
2872         pRAID_Context->reg_lock_row_lba    = 0;
2873         pRAID_Context->reg_lock_length    = 0;
2874
2875         if (fusion->fast_path_io && (
2876                 device_id < instance->fw_supported_vd_count)) {
2877
2878                 ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
2879                 if (ld >= instance->fw_supported_vd_count - 1)
2880                         fp_possible = 0;
2881                 else {
2882                         raid = MR_LdRaidGet(ld, local_map_ptr);
2883                         if (!(raid->capability.fpNonRWCapable))
2884                                 fp_possible = 0;
2885                 }
2886         } else
2887                 fp_possible = 0;
2888
2889         if (!fp_possible) {
2890                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
2891                 io_request->DevHandle = cpu_to_le16(device_id);
2892                 io_request->LUN[1] = scmd->device->lun;
2893                 pRAID_Context->timeout_value =
2894                         cpu_to_le16 (scmd->request->timeout / HZ);
2895                 cmd->request_desc->SCSIIO.RequestFlags =
2896                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
2897                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2898         } else {
2899
2900                 /* set RAID context values */
2901                 pRAID_Context->config_seq_num = raid->seqNum;
2902                 if (instance->adapter_type < VENTURA_SERIES)
2903                         pRAID_Context->reg_lock_flags = REGION_TYPE_SHARED_READ;
2904                 pRAID_Context->timeout_value =
2905                         cpu_to_le16(raid->fpIoTimeoutForLd);
2906
2907                 /* get the DevHandle for the PD (since this is
2908                    fpNonRWCapable, this is a single disk RAID0) */
2909                 span = physArm = 0;
2910                 arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
2911                 pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
2912                 devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
2913
2914                 /* build request descriptor */
2915                 cmd->request_desc->SCSIIO.RequestFlags =
2916                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
2917                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2918                 cmd->request_desc->SCSIIO.DevHandle = devHandle;
2919
2920                 /* populate the LUN field */
2921                 memcpy(io_request->LUN, raid->LUN, 8);
2922
2923                 /* build the raidScsiIO structure */
2924                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
2925                 io_request->DevHandle = devHandle;
2926         }
2927 }
2928
2929 /**
2930  * megasas_build_syspd_fusion - prepares rw/non-rw ios for syspd
2931  * @instance:           Adapter soft state
2932  * @scp:                SCSI command
2933  * @cmd:                Command to be prepared
2934  * @fp_possible:        parameter to detect fast path or firmware path io.
2935  *
2936  * Prepares the io_request frame for rw/non-rw io cmds for syspds
2937  */
2938 static void
2939 megasas_build_syspd_fusion(struct megasas_instance *instance,
2940         struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd,
2941         bool fp_possible)
2942 {
2943         u32 device_id;
2944         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
2945         u16 pd_index = 0;
2946         u16 os_timeout_value;
2947         u16 timeout_limit;
2948         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
2949         struct RAID_CONTEXT     *pRAID_Context;
2950         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
2951         struct MR_PRIV_DEVICE *mr_device_priv_data;
2952         struct fusion_context *fusion = instance->ctrl_context;
2953         pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id - 1) & 1];
2954
2955         device_id = MEGASAS_DEV_INDEX(scmd);
2956         pd_index = MEGASAS_PD_INDEX(scmd);
2957         os_timeout_value = scmd->request->timeout / HZ;
2958         mr_device_priv_data = scmd->device->hostdata;
2959         cmd->pd_interface = mr_device_priv_data->interface_type;
2960
2961         io_request = cmd->io_request;
2962         /* get RAID_Context pointer */
2963         pRAID_Context = &io_request->RaidContext.raid_context;
2964         pRAID_Context->reg_lock_flags = 0;
2965         pRAID_Context->reg_lock_row_lba = 0;
2966         pRAID_Context->reg_lock_length = 0;
2967         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
2968         io_request->LUN[1] = scmd->device->lun;
2969         pRAID_Context->raid_flags = MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD
2970                 << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
2971
2972         /* If FW supports PD sequence number */
2973         if (instance->use_seqnum_jbod_fp &&
2974                 instance->pd_list[pd_index].driveType == TYPE_DISK) {
2975                 /* TgtId must be incremented by 255 as jbod seq number is index
2976                  * below raid map
2977                  */
2978                  /* More than 256 PD/JBOD support for Ventura */
2979                 if (instance->support_morethan256jbod)
2980                         pRAID_Context->virtual_disk_tgt_id =
2981                                 pd_sync->seq[pd_index].pd_target_id;
2982                 else
2983                         pRAID_Context->virtual_disk_tgt_id =
2984                                 cpu_to_le16(device_id + (MAX_PHYSICAL_DEVICES - 1));
2985                 pRAID_Context->config_seq_num = pd_sync->seq[pd_index].seqNum;
2986                 io_request->DevHandle = pd_sync->seq[pd_index].devHandle;
2987                 if (instance->adapter_type >= VENTURA_SERIES) {
2988                         io_request->RaidContext.raid_context_g35.routing_flags |=
2989                                 (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2990                         io_request->RaidContext.raid_context_g35.nseg_type |=
2991                                                         (1 << RAID_CONTEXT_NSEG_SHIFT);
2992                         io_request->RaidContext.raid_context_g35.nseg_type |=
2993                                                         (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2994                 } else {
2995                         pRAID_Context->type = MPI2_TYPE_CUDA;
2996                         pRAID_Context->nseg = 0x1;
2997                         pRAID_Context->reg_lock_flags |=
2998                                 (MR_RL_FLAGS_SEQ_NUM_ENABLE|MR_RL_FLAGS_GRANT_DESTINATION_CUDA);
2999                 }
3000         } else if (fusion->fast_path_io) {
3001                 pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3002                 pRAID_Context->config_seq_num = 0;
3003                 local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
3004                 io_request->DevHandle =
3005                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
3006         } else {
3007                 /* Want to send all IO via FW path */
3008                 pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3009                 pRAID_Context->config_seq_num = 0;
3010                 io_request->DevHandle = cpu_to_le16(0xFFFF);
3011         }
3012
3013         cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
3014
3015         cmd->request_desc->SCSIIO.MSIxIndex =
3016                 instance->reply_map[raw_smp_processor_id()];
3017
3018         if (!fp_possible) {
3019                 /* system pd firmware path */
3020                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
3021                 cmd->request_desc->SCSIIO.RequestFlags =
3022                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3023                                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3024                 pRAID_Context->timeout_value = cpu_to_le16(os_timeout_value);
3025                 pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3026         } else {
3027                 if (os_timeout_value)
3028                         os_timeout_value++;
3029
3030                 /* system pd Fast Path */
3031                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
3032                 timeout_limit = (scmd->device->type == TYPE_DISK) ?
3033                                 255 : 0xFFFF;
3034                 pRAID_Context->timeout_value =
3035                         cpu_to_le16((os_timeout_value > timeout_limit) ?
3036                         timeout_limit : os_timeout_value);
3037                 if (instance->adapter_type >= INVADER_SERIES)
3038                         io_request->IoFlags |=
3039                                 cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
3040
3041                 cmd->request_desc->SCSIIO.RequestFlags =
3042                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
3043                                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3044         }
3045 }
3046
3047 /**
3048  * megasas_build_io_fusion -    Prepares IOs to devices
3049  * @instance:           Adapter soft state
3050  * @scp:                SCSI command
3051  * @cmd:                Command to be prepared
3052  *
3053  * Invokes helper functions to prepare request frames
3054  * and sets flags appropriate for IO/Non-IO cmd
3055  */
3056 int
3057 megasas_build_io_fusion(struct megasas_instance *instance,
3058                         struct scsi_cmnd *scp,
3059                         struct megasas_cmd_fusion *cmd)
3060 {
3061         int sge_count;
3062         u8  cmd_type;
3063         struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
3064         struct MR_PRIV_DEVICE *mr_device_priv_data;
3065         mr_device_priv_data = scp->device->hostdata;
3066
3067         /* Zero out some fields so they don't get reused */
3068         memset(io_request->LUN, 0x0, 8);
3069         io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
3070         io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
3071         io_request->EEDPFlags = 0;
3072         io_request->Control = 0;
3073         io_request->EEDPBlockSize = 0;
3074         io_request->ChainOffset = 0;
3075         io_request->RaidContext.raid_context.raid_flags = 0;
3076         io_request->RaidContext.raid_context.type = 0;
3077         io_request->RaidContext.raid_context.nseg = 0;
3078
3079         memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
3080         /*
3081          * Just the CDB length,rest of the Flags are zero
3082          * This will be modified for FP in build_ldio_fusion
3083          */
3084         io_request->IoFlags = cpu_to_le16(scp->cmd_len);
3085
3086         switch (cmd_type = megasas_cmd_type(scp)) {
3087         case READ_WRITE_LDIO:
3088                 megasas_build_ldio_fusion(instance, scp, cmd);
3089                 break;
3090         case NON_READ_WRITE_LDIO:
3091                 megasas_build_ld_nonrw_fusion(instance, scp, cmd);
3092                 break;
3093         case READ_WRITE_SYSPDIO:
3094                 megasas_build_syspd_fusion(instance, scp, cmd, true);
3095                 break;
3096         case NON_READ_WRITE_SYSPDIO:
3097                 if (instance->secure_jbod_support ||
3098                     mr_device_priv_data->is_tm_capable)
3099                         megasas_build_syspd_fusion(instance, scp, cmd, false);
3100                 else
3101                         megasas_build_syspd_fusion(instance, scp, cmd, true);
3102                 break;
3103         default:
3104                 break;
3105         }
3106
3107         /*
3108          * Construct SGL
3109          */
3110
3111         sge_count = megasas_make_sgl(instance, scp, cmd);
3112
3113         if (sge_count > instance->max_num_sge || (sge_count < 0)) {
3114                 dev_err(&instance->pdev->dev,
3115                         "%s %d sge_count (%d) is out of range. Range is:  0-%d\n",
3116                         __func__, __LINE__, sge_count, instance->max_num_sge);
3117                 return 1;
3118         }
3119
3120         if (instance->adapter_type >= VENTURA_SERIES) {
3121                 set_num_sge(&io_request->RaidContext.raid_context_g35, sge_count);
3122                 cpu_to_le16s(&io_request->RaidContext.raid_context_g35.routing_flags);
3123                 cpu_to_le16s(&io_request->RaidContext.raid_context_g35.nseg_type);
3124         } else {
3125                 /* numSGE store lower 8 bit of sge_count.
3126                  * numSGEExt store higher 8 bit of sge_count
3127                  */
3128                 io_request->RaidContext.raid_context.num_sge = sge_count;
3129                 io_request->RaidContext.raid_context.num_sge_ext =
3130                         (u8)(sge_count >> 8);
3131         }
3132
3133         io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING);
3134
3135         if (scp->sc_data_direction == DMA_TO_DEVICE)
3136                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE);
3137         else if (scp->sc_data_direction == DMA_FROM_DEVICE)
3138                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ);
3139
3140         io_request->SGLOffset0 =
3141                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
3142
3143         io_request->SenseBufferLowAddress =
3144                 cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));
3145         io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
3146
3147         cmd->scmd = scp;
3148         scp->SCp.ptr = (char *)cmd;
3149
3150         return 0;
3151 }
3152
3153 static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
3154 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
3155 {
3156         u8 *p;
3157         struct fusion_context *fusion;
3158
3159         fusion = instance->ctrl_context;
3160         p = fusion->req_frames_desc +
3161                 sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) * index;
3162
3163         return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
3164 }
3165
3166
3167 /* megasas_prepate_secondRaid1_IO
3168  *  It prepares the raid 1 second IO
3169  */
3170 void megasas_prepare_secondRaid1_IO(struct megasas_instance *instance,
3171                             struct megasas_cmd_fusion *cmd,
3172                             struct megasas_cmd_fusion *r1_cmd)
3173 {
3174         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc, *req_desc2 = NULL;
3175         struct fusion_context *fusion;
3176         fusion = instance->ctrl_context;
3177         req_desc = cmd->request_desc;
3178         /* copy the io request frame as well as 8 SGEs data for r1 command*/
3179         memcpy(r1_cmd->io_request, cmd->io_request,
3180                (sizeof(struct MPI2_RAID_SCSI_IO_REQUEST)));
3181         memcpy(&r1_cmd->io_request->SGL, &cmd->io_request->SGL,
3182                (fusion->max_sge_in_main_msg * sizeof(union MPI2_SGE_IO_UNION)));
3183         /*sense buffer is different for r1 command*/
3184         r1_cmd->io_request->SenseBufferLowAddress =
3185                         cpu_to_le32(lower_32_bits(r1_cmd->sense_phys_addr));
3186         r1_cmd->scmd = cmd->scmd;
3187         req_desc2 = megasas_get_request_descriptor(instance,
3188                                                    (r1_cmd->index - 1));
3189         req_desc2->Words = 0;
3190         r1_cmd->request_desc = req_desc2;
3191         req_desc2->SCSIIO.SMID = cpu_to_le16(r1_cmd->index);
3192         req_desc2->SCSIIO.RequestFlags = req_desc->SCSIIO.RequestFlags;
3193         r1_cmd->request_desc->SCSIIO.DevHandle = cmd->r1_alt_dev_handle;
3194         r1_cmd->io_request->DevHandle = cmd->r1_alt_dev_handle;
3195         r1_cmd->r1_alt_dev_handle = cmd->io_request->DevHandle;
3196         cmd->io_request->RaidContext.raid_context_g35.smid.peer_smid =
3197                         cpu_to_le16(r1_cmd->index);
3198         r1_cmd->io_request->RaidContext.raid_context_g35.smid.peer_smid =
3199                         cpu_to_le16(cmd->index);
3200         /*MSIxIndex of both commands request descriptors should be same*/
3201         r1_cmd->request_desc->SCSIIO.MSIxIndex =
3202                         cmd->request_desc->SCSIIO.MSIxIndex;
3203         /*span arm is different for r1 cmd*/
3204         r1_cmd->io_request->RaidContext.raid_context_g35.span_arm =
3205                         cmd->io_request->RaidContext.raid_context_g35.span_arm + 1;
3206 }
3207
3208 /**
3209  * megasas_build_and_issue_cmd_fusion -Main routine for building and
3210  *                                     issuing non IOCTL cmd
3211  * @instance:                   Adapter soft state
3212  * @scmd:                       pointer to scsi cmd from OS
3213  */
3214 static u32
3215 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
3216                                    struct scsi_cmnd *scmd)
3217 {
3218         struct megasas_cmd_fusion *cmd, *r1_cmd = NULL;
3219         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
3220         u32 index;
3221
3222         if ((megasas_cmd_type(scmd) == READ_WRITE_LDIO) &&
3223                 instance->ldio_threshold &&
3224                 (atomic_inc_return(&instance->ldio_outstanding) >
3225                 instance->ldio_threshold)) {
3226                 atomic_dec(&instance->ldio_outstanding);
3227                 return SCSI_MLQUEUE_DEVICE_BUSY;
3228         }
3229
3230         if (atomic_inc_return(&instance->fw_outstanding) >
3231                         instance->host->can_queue) {
3232                 atomic_dec(&instance->fw_outstanding);
3233                 return SCSI_MLQUEUE_HOST_BUSY;
3234         }
3235
3236         cmd = megasas_get_cmd_fusion(instance, scmd->request->tag);
3237
3238         if (!cmd) {
3239                 atomic_dec(&instance->fw_outstanding);
3240                 return SCSI_MLQUEUE_HOST_BUSY;
3241         }
3242
3243         index = cmd->index;
3244
3245         req_desc = megasas_get_request_descriptor(instance, index-1);
3246
3247         req_desc->Words = 0;
3248         cmd->request_desc = req_desc;
3249
3250         if (megasas_build_io_fusion(instance, scmd, cmd)) {
3251                 megasas_return_cmd_fusion(instance, cmd);
3252                 dev_err(&instance->pdev->dev, "Error building command\n");
3253                 cmd->request_desc = NULL;
3254                 atomic_dec(&instance->fw_outstanding);
3255                 return SCSI_MLQUEUE_HOST_BUSY;
3256         }
3257
3258         req_desc = cmd->request_desc;
3259         req_desc->SCSIIO.SMID = cpu_to_le16(index);
3260
3261         if (cmd->io_request->ChainOffset != 0 &&
3262             cmd->io_request->ChainOffset != 0xF)
3263                 dev_err(&instance->pdev->dev, "The chain offset value is not "
3264                        "correct : %x\n", cmd->io_request->ChainOffset);
3265         /*
3266          *      if it is raid 1/10 fp write capable.
3267          *      try to get second command from pool and construct it.
3268          *      From FW, it has confirmed that lba values of two PDs
3269          *      corresponds to single R1/10 LD are always same
3270          *
3271          */
3272         /*      driver side count always should be less than max_fw_cmds
3273          *      to get new command
3274          */
3275         if (cmd->r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
3276                 r1_cmd = megasas_get_cmd_fusion(instance,
3277                                 (scmd->request->tag + instance->max_fw_cmds));
3278                 megasas_prepare_secondRaid1_IO(instance, cmd, r1_cmd);
3279         }
3280
3281
3282         /*
3283          * Issue the command to the FW
3284          */
3285
3286         megasas_fire_cmd_fusion(instance, req_desc);
3287
3288         if (r1_cmd)
3289                 megasas_fire_cmd_fusion(instance, r1_cmd->request_desc);
3290
3291
3292         return 0;
3293 }
3294
3295 /**
3296  * megasas_complete_r1_command -
3297  * completes R1 FP write commands which has valid peer smid
3298  * @instance:                   Adapter soft state
3299  * @cmd_fusion:                 MPT command frame
3300  *
3301  */
3302 static inline void
3303 megasas_complete_r1_command(struct megasas_instance *instance,
3304                             struct megasas_cmd_fusion *cmd)
3305 {
3306         u8 *sense, status, ex_status;
3307         u32 data_length;
3308         u16 peer_smid;
3309         struct fusion_context *fusion;
3310         struct megasas_cmd_fusion *r1_cmd = NULL;
3311         struct scsi_cmnd *scmd_local = NULL;
3312         struct RAID_CONTEXT_G35 *rctx_g35;
3313
3314         rctx_g35 = &cmd->io_request->RaidContext.raid_context_g35;
3315         fusion = instance->ctrl_context;
3316         peer_smid = le16_to_cpu(rctx_g35->smid.peer_smid);
3317
3318         r1_cmd = fusion->cmd_list[peer_smid - 1];
3319         scmd_local = cmd->scmd;
3320         status = rctx_g35->status;
3321         ex_status = rctx_g35->ex_status;
3322         data_length = cmd->io_request->DataLength;
3323         sense = cmd->sense;
3324
3325         cmd->cmd_completed = true;
3326
3327         /* Check if peer command is completed or not*/
3328         if (r1_cmd->cmd_completed) {
3329                 rctx_g35 = &r1_cmd->io_request->RaidContext.raid_context_g35;
3330                 if (rctx_g35->status != MFI_STAT_OK) {
3331                         status = rctx_g35->status;
3332                         ex_status = rctx_g35->ex_status;
3333                         data_length = r1_cmd->io_request->DataLength;
3334                         sense = r1_cmd->sense;
3335                 }
3336
3337                 megasas_return_cmd_fusion(instance, r1_cmd);
3338                 map_cmd_status(fusion, scmd_local, status, ex_status,
3339                                le32_to_cpu(data_length), sense);
3340                 if (instance->ldio_threshold &&
3341                     megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
3342                         atomic_dec(&instance->ldio_outstanding);
3343                 scmd_local->SCp.ptr = NULL;
3344                 megasas_return_cmd_fusion(instance, cmd);
3345                 scsi_dma_unmap(scmd_local);
3346                 scmd_local->scsi_done(scmd_local);
3347         }
3348 }
3349
3350 /**
3351  * complete_cmd_fusion -        Completes command
3352  * @instance:                   Adapter soft state
3353  * Completes all commands that is in reply descriptor queue
3354  */
3355 int
3356 complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
3357 {
3358         union MPI2_REPLY_DESCRIPTORS_UNION *desc;
3359         struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
3360         struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
3361         struct fusion_context *fusion;
3362         struct megasas_cmd *cmd_mfi;
3363         struct megasas_cmd_fusion *cmd_fusion;
3364         u16 smid, num_completed;
3365         u8 reply_descript_type, *sense, status, extStatus;
3366         u32 device_id, data_length;
3367         union desc_value d_val;
3368         struct LD_LOAD_BALANCE_INFO *lbinfo;
3369         int threshold_reply_count = 0;
3370         struct scsi_cmnd *scmd_local = NULL;
3371         struct MR_TASK_MANAGE_REQUEST *mr_tm_req;
3372         struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_tm_req;
3373
3374         fusion = instance->ctrl_context;
3375
3376         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
3377                 return IRQ_HANDLED;
3378
3379         desc = fusion->reply_frames_desc[MSIxIndex] +
3380                                 fusion->last_reply_idx[MSIxIndex];
3381
3382         reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
3383
3384         d_val.word = desc->Words;
3385
3386         reply_descript_type = reply_desc->ReplyFlags &
3387                 MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
3388
3389         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
3390                 return IRQ_NONE;
3391
3392         num_completed = 0;
3393
3394         while (d_val.u.low != cpu_to_le32(UINT_MAX) &&
3395                d_val.u.high != cpu_to_le32(UINT_MAX)) {
3396
3397                 smid = le16_to_cpu(reply_desc->SMID);
3398                 cmd_fusion = fusion->cmd_list[smid - 1];
3399                 scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *)
3400                                                 cmd_fusion->io_request;
3401
3402                 scmd_local = cmd_fusion->scmd;
3403                 status = scsi_io_req->RaidContext.raid_context.status;
3404                 extStatus = scsi_io_req->RaidContext.raid_context.ex_status;
3405                 sense = cmd_fusion->sense;
3406                 data_length = scsi_io_req->DataLength;
3407
3408                 switch (scsi_io_req->Function) {
3409                 case MPI2_FUNCTION_SCSI_TASK_MGMT:
3410                         mr_tm_req = (struct MR_TASK_MANAGE_REQUEST *)
3411                                                 cmd_fusion->io_request;
3412                         mpi_tm_req = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *)
3413                                                 &mr_tm_req->TmRequest;
3414                         dev_dbg(&instance->pdev->dev, "TM completion:"
3415                                 "type: 0x%x TaskMID: 0x%x\n",
3416                                 mpi_tm_req->TaskType, mpi_tm_req->TaskMID);
3417                         complete(&cmd_fusion->done);
3418                         break;
3419                 case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
3420                         /* Update load balancing info */
3421                         if (fusion->load_balance_info &&
3422                             (cmd_fusion->scmd->SCp.Status &
3423                             MEGASAS_LOAD_BALANCE_FLAG)) {
3424                                 device_id = MEGASAS_DEV_INDEX(scmd_local);
3425                                 lbinfo = &fusion->load_balance_info[device_id];
3426                                 atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]);
3427                                 cmd_fusion->scmd->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
3428                         }
3429                         /* Fall through - and complete IO */
3430                 case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
3431                         atomic_dec(&instance->fw_outstanding);
3432                         if (cmd_fusion->r1_alt_dev_handle == MR_DEVHANDLE_INVALID) {
3433                                 map_cmd_status(fusion, scmd_local, status,
3434                                                extStatus, le32_to_cpu(data_length),
3435                                                sense);
3436                                 if (instance->ldio_threshold &&
3437                                     (megasas_cmd_type(scmd_local) == READ_WRITE_LDIO))
3438                                         atomic_dec(&instance->ldio_outstanding);
3439                                 scmd_local->SCp.ptr = NULL;
3440                                 megasas_return_cmd_fusion(instance, cmd_fusion);
3441                                 scsi_dma_unmap(scmd_local);
3442                                 scmd_local->scsi_done(scmd_local);
3443                         } else  /* Optimal VD - R1 FP command completion. */
3444                                 megasas_complete_r1_command(instance, cmd_fusion);
3445                         break;
3446                 case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
3447                         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
3448                         /* Poll mode. Dummy free.
3449                          * In case of Interrupt mode, caller has reverse check.
3450                          */
3451                         if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) {
3452                                 cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE;
3453                                 megasas_return_cmd(instance, cmd_mfi);
3454                         } else
3455                                 megasas_complete_cmd(instance, cmd_mfi, DID_OK);
3456                         break;
3457                 }
3458
3459                 fusion->last_reply_idx[MSIxIndex]++;
3460                 if (fusion->last_reply_idx[MSIxIndex] >=
3461                     fusion->reply_q_depth)
3462                         fusion->last_reply_idx[MSIxIndex] = 0;
3463
3464                 desc->Words = cpu_to_le64(ULLONG_MAX);
3465                 num_completed++;
3466                 threshold_reply_count++;
3467
3468                 /* Get the next reply descriptor */
3469                 if (!fusion->last_reply_idx[MSIxIndex])
3470                         desc = fusion->reply_frames_desc[MSIxIndex];
3471                 else
3472                         desc++;
3473
3474                 reply_desc =
3475                   (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
3476
3477                 d_val.word = desc->Words;
3478
3479                 reply_descript_type = reply_desc->ReplyFlags &
3480                         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
3481
3482                 if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
3483                         break;
3484                 /*
3485                  * Write to reply post host index register after completing threshold
3486                  * number of reply counts and still there are more replies in reply queue
3487                  * pending to be completed
3488                  */
3489                 if (threshold_reply_count >= THRESHOLD_REPLY_COUNT) {
3490                         if (instance->msix_combined)
3491                                 writel(((MSIxIndex & 0x7) << 24) |
3492                                         fusion->last_reply_idx[MSIxIndex],
3493                                         instance->reply_post_host_index_addr[MSIxIndex/8]);
3494                         else
3495                                 writel((MSIxIndex << 24) |
3496                                         fusion->last_reply_idx[MSIxIndex],
3497                                         instance->reply_post_host_index_addr[0]);
3498                         threshold_reply_count = 0;
3499                 }
3500         }
3501
3502         if (!num_completed)
3503                 return IRQ_NONE;
3504
3505         wmb();
3506         if (instance->msix_combined)
3507                 writel(((MSIxIndex & 0x7) << 24) |
3508                         fusion->last_reply_idx[MSIxIndex],
3509                         instance->reply_post_host_index_addr[MSIxIndex/8]);
3510         else
3511                 writel((MSIxIndex << 24) |
3512                         fusion->last_reply_idx[MSIxIndex],
3513                         instance->reply_post_host_index_addr[0]);
3514         megasas_check_and_restore_queue_depth(instance);
3515         return IRQ_HANDLED;
3516 }
3517
3518 /**
3519  * megasas_sync_irqs -  Synchronizes all IRQs owned by adapter
3520  * @instance:                   Adapter soft state
3521  */
3522 void megasas_sync_irqs(unsigned long instance_addr)
3523 {
3524         u32 count, i;
3525         struct megasas_instance *instance =
3526                 (struct megasas_instance *)instance_addr;
3527
3528         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3529
3530         for (i = 0; i < count; i++)
3531                 synchronize_irq(pci_irq_vector(instance->pdev, i));
3532 }
3533
3534 /**
3535  * megasas_complete_cmd_dpc_fusion -    Completes command
3536  * @instance:                   Adapter soft state
3537  *
3538  * Tasklet to complete cmds
3539  */
3540 void
3541 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
3542 {
3543         struct megasas_instance *instance =
3544                 (struct megasas_instance *)instance_addr;
3545         u32 count, MSIxIndex;
3546
3547         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3548
3549         /* If we have already declared adapter dead, donot complete cmds */
3550         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
3551                 return;
3552
3553         for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
3554                 complete_cmd_fusion(instance, MSIxIndex);
3555 }
3556
3557 /**
3558  * megasas_isr_fusion - isr entry point
3559  */
3560 irqreturn_t megasas_isr_fusion(int irq, void *devp)
3561 {
3562         struct megasas_irq_context *irq_context = devp;
3563         struct megasas_instance *instance = irq_context->instance;
3564         u32 mfiStatus;
3565
3566         if (instance->mask_interrupts)
3567                 return IRQ_NONE;
3568
3569         if (!instance->msix_vectors) {
3570                 mfiStatus = instance->instancet->clear_intr(instance);
3571                 if (!mfiStatus)
3572                         return IRQ_NONE;
3573         }
3574
3575         /* If we are resetting, bail */
3576         if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
3577                 instance->instancet->clear_intr(instance);
3578                 return IRQ_HANDLED;
3579         }
3580
3581         return complete_cmd_fusion(instance, irq_context->MSIxIndex);
3582 }
3583
3584 /**
3585  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
3586  * @instance:                   Adapter soft state
3587  * mfi_cmd:                     megasas_cmd pointer
3588  *
3589  */
3590 void
3591 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
3592                         struct megasas_cmd *mfi_cmd)
3593 {
3594         struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
3595         struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
3596         struct megasas_cmd_fusion *cmd;
3597         struct fusion_context *fusion;
3598         struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
3599
3600         fusion = instance->ctrl_context;
3601
3602         cmd = megasas_get_cmd_fusion(instance,
3603                         instance->max_scsi_cmds + mfi_cmd->index);
3604
3605         /*  Save the smid. To be used for returning the cmd */
3606         mfi_cmd->context.smid = cmd->index;
3607
3608         /*
3609          * For cmds where the flag is set, store the flag and check
3610          * on completion. For cmds with this flag, don't call
3611          * megasas_complete_cmd
3612          */
3613
3614         if (frame_hdr->flags & cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE))
3615                 mfi_cmd->flags |= DRV_DCMD_POLLED_MODE;
3616
3617         io_req = cmd->io_request;
3618
3619         if (instance->adapter_type >= INVADER_SERIES) {
3620                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
3621                         (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
3622                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
3623                 sgl_ptr_end->Flags = 0;
3624         }
3625
3626         mpi25_ieee_chain =
3627           (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
3628
3629         io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
3630         io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
3631                                        SGL) / 4;
3632         io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
3633
3634         mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr);
3635
3636         mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
3637                 MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
3638
3639         mpi25_ieee_chain->Length = cpu_to_le32(instance->mfi_frame_size);
3640 }
3641
3642 /**
3643  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
3644  * @instance:                   Adapter soft state
3645  * @cmd:                        mfi cmd to build
3646  *
3647  */
3648 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
3649 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
3650 {
3651         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc = NULL;
3652         u16 index;
3653
3654         build_mpt_mfi_pass_thru(instance, cmd);
3655         index = cmd->context.smid;
3656
3657         req_desc = megasas_get_request_descriptor(instance, index - 1);
3658
3659         req_desc->Words = 0;
3660         req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3661                                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3662
3663         req_desc->SCSIIO.SMID = cpu_to_le16(index);
3664
3665         return req_desc;
3666 }
3667
3668 /**
3669  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
3670  * @instance:                   Adapter soft state
3671  * @cmd:                        mfi cmd pointer
3672  *
3673  */
3674 void
3675 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
3676                           struct megasas_cmd *cmd)
3677 {
3678         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
3679
3680         req_desc = build_mpt_cmd(instance, cmd);
3681
3682         megasas_fire_cmd_fusion(instance, req_desc);
3683         return;
3684 }
3685
3686 /**
3687  * megasas_release_fusion -     Reverses the FW initialization
3688  * @instance:                   Adapter soft state
3689  */
3690 void
3691 megasas_release_fusion(struct megasas_instance *instance)
3692 {
3693         megasas_free_ioc_init_cmd(instance);
3694         megasas_free_cmds(instance);
3695         megasas_free_cmds_fusion(instance);
3696
3697         iounmap(instance->reg_set);
3698
3699         pci_release_selected_regions(instance->pdev, 1<<instance->bar);
3700 }
3701
3702 /**
3703  * megasas_read_fw_status_reg_fusion - returns the current FW status value
3704  * @regs:                       MFI register set
3705  */
3706 static u32
3707 megasas_read_fw_status_reg_fusion(struct megasas_instance *instance)
3708 {
3709         return megasas_readl(instance, &instance->reg_set->outbound_scratch_pad_0);
3710 }
3711
3712 /**
3713  * megasas_alloc_host_crash_buffer -    Host buffers for Crash dump collection from Firmware
3714  * @instance:                           Controller's soft instance
3715  * return:                              Number of allocated host crash buffers
3716  */
3717 static void
3718 megasas_alloc_host_crash_buffer(struct megasas_instance *instance)
3719 {
3720         unsigned int i;
3721
3722         for (i = 0; i < MAX_CRASH_DUMP_SIZE; i++) {
3723                 instance->crash_buf[i] = vzalloc(CRASH_DMA_BUF_SIZE);
3724                 if (!instance->crash_buf[i]) {
3725                         dev_info(&instance->pdev->dev, "Firmware crash dump "
3726                                 "memory allocation failed at index %d\n", i);
3727                         break;
3728                 }
3729         }
3730         instance->drv_buf_alloc = i;
3731 }
3732
3733 /**
3734  * megasas_free_host_crash_buffer -     Host buffers for Crash dump collection from Firmware
3735  * @instance:                           Controller's soft instance
3736  */
3737 void
3738 megasas_free_host_crash_buffer(struct megasas_instance *instance)
3739 {
3740         unsigned int i;
3741         for (i = 0; i < instance->drv_buf_alloc; i++) {
3742                 if (instance->crash_buf[i])
3743                         vfree(instance->crash_buf[i]);
3744         }
3745         instance->drv_buf_index = 0;
3746         instance->drv_buf_alloc = 0;
3747         instance->fw_crash_state = UNAVAILABLE;
3748         instance->fw_crash_buffer_size = 0;
3749 }
3750
3751 /**
3752  * megasas_adp_reset_fusion -   For controller reset
3753  * @regs:                               MFI register set
3754  */
3755 static int
3756 megasas_adp_reset_fusion(struct megasas_instance *instance,
3757                          struct megasas_register_set __iomem *regs)
3758 {
3759         u32 host_diag, abs_state, retry;
3760
3761         /* Now try to reset the chip */
3762         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3763         writel(MPI2_WRSEQ_1ST_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3764         writel(MPI2_WRSEQ_2ND_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3765         writel(MPI2_WRSEQ_3RD_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3766         writel(MPI2_WRSEQ_4TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3767         writel(MPI2_WRSEQ_5TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3768         writel(MPI2_WRSEQ_6TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3769
3770         /* Check that the diag write enable (DRWE) bit is on */
3771         host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag);
3772         retry = 0;
3773         while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
3774                 msleep(100);
3775                 host_diag = megasas_readl(instance,
3776                                           &instance->reg_set->fusion_host_diag);
3777                 if (retry++ == 100) {
3778                         dev_warn(&instance->pdev->dev,
3779                                 "Host diag unlock failed from %s %d\n",
3780                                 __func__, __LINE__);
3781                         break;
3782                 }
3783         }
3784         if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
3785                 return -1;
3786
3787         /* Send chip reset command */
3788         writel(host_diag | HOST_DIAG_RESET_ADAPTER,
3789                 &instance->reg_set->fusion_host_diag);
3790         msleep(3000);
3791
3792         /* Make sure reset adapter bit is cleared */
3793         host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag);
3794         retry = 0;
3795         while (host_diag & HOST_DIAG_RESET_ADAPTER) {
3796                 msleep(100);
3797                 host_diag = megasas_readl(instance,
3798                                           &instance->reg_set->fusion_host_diag);
3799                 if (retry++ == 1000) {
3800                         dev_warn(&instance->pdev->dev,
3801                                 "Diag reset adapter never cleared %s %d\n",
3802                                 __func__, __LINE__);
3803                         break;
3804                 }
3805         }
3806         if (host_diag & HOST_DIAG_RESET_ADAPTER)
3807                 return -1;
3808
3809         abs_state = instance->instancet->read_fw_status_reg(instance)
3810                         & MFI_STATE_MASK;
3811         retry = 0;
3812
3813         while ((abs_state <= MFI_STATE_FW_INIT) && (retry++ < 1000)) {
3814                 msleep(100);
3815                 abs_state = instance->instancet->
3816                         read_fw_status_reg(instance) & MFI_STATE_MASK;
3817         }
3818         if (abs_state <= MFI_STATE_FW_INIT) {
3819                 dev_warn(&instance->pdev->dev,
3820                         "fw state < MFI_STATE_FW_INIT, state = 0x%x %s %d\n",
3821                         abs_state, __func__, __LINE__);
3822                 return -1;
3823         }
3824
3825         return 0;
3826 }
3827
3828 /**
3829  * megasas_check_reset_fusion - For controller reset check
3830  * @regs:                               MFI register set
3831  */
3832 static int
3833 megasas_check_reset_fusion(struct megasas_instance *instance,
3834                            struct megasas_register_set __iomem *regs)
3835 {
3836         return 0;
3837 }
3838
3839 /**
3840  * megasas_trigger_snap_dump -  Trigger snap dump in FW
3841  * @instance:                   Soft instance of adapter
3842  */
3843 static inline void megasas_trigger_snap_dump(struct megasas_instance *instance)
3844 {
3845         int j;
3846         u32 fw_state;
3847
3848         if (!instance->disableOnlineCtrlReset) {
3849                 dev_info(&instance->pdev->dev, "Trigger snap dump\n");
3850                 writel(MFI_ADP_TRIGGER_SNAP_DUMP,
3851                        &instance->reg_set->doorbell);
3852                 readl(&instance->reg_set->doorbell);
3853         }
3854
3855         for (j = 0; j < instance->snapdump_wait_time; j++) {
3856                 fw_state = instance->instancet->read_fw_status_reg(instance) &
3857                                 MFI_STATE_MASK;
3858                 if (fw_state == MFI_STATE_FAULT) {
3859                         dev_err(&instance->pdev->dev,
3860                                 "Found FW in FAULT state, after snap dump trigger\n");
3861                         return;
3862                 }
3863                 msleep(1000);
3864         }
3865 }
3866
3867 /* This function waits for outstanding commands on fusion to complete */
3868 int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
3869                                         int reason, int *convert)
3870 {
3871         int i, outstanding, retval = 0, hb_seconds_missed = 0;
3872         u32 fw_state;
3873         u32 waittime_for_io_completion;
3874
3875         waittime_for_io_completion =
3876                 min_t(u32, resetwaittime,
3877                         (resetwaittime - instance->snapdump_wait_time));
3878
3879         if (reason == MFI_IO_TIMEOUT_OCR) {
3880                 dev_info(&instance->pdev->dev,
3881                         "MFI command is timed out\n");
3882                 megasas_complete_cmd_dpc_fusion((unsigned long)instance);
3883                 if (instance->snapdump_wait_time)
3884                         megasas_trigger_snap_dump(instance);
3885                 retval = 1;
3886                 goto out;
3887         }
3888
3889         for (i = 0; i < waittime_for_io_completion; i++) {
3890                 /* Check if firmware is in fault state */
3891                 fw_state = instance->instancet->read_fw_status_reg(instance) &
3892                                 MFI_STATE_MASK;
3893                 if (fw_state == MFI_STATE_FAULT) {
3894                         dev_warn(&instance->pdev->dev, "Found FW in FAULT state,"
3895                                " will reset adapter scsi%d.\n",
3896                                 instance->host->host_no);
3897                         megasas_complete_cmd_dpc_fusion((unsigned long)instance);
3898                         if (instance->requestorId && reason) {
3899                                 dev_warn(&instance->pdev->dev, "SR-IOV Found FW in FAULT"
3900                                 " state while polling during"
3901                                 " I/O timeout handling for %d\n",
3902                                 instance->host->host_no);
3903                                 *convert = 1;
3904                         }
3905
3906                         retval = 1;
3907                         goto out;
3908                 }
3909
3910
3911                 /* If SR-IOV VF mode & heartbeat timeout, don't wait */
3912                 if (instance->requestorId && !reason) {
3913                         retval = 1;
3914                         goto out;
3915                 }
3916
3917                 /* If SR-IOV VF mode & I/O timeout, check for HB timeout */
3918                 if (instance->requestorId && (reason == SCSIIO_TIMEOUT_OCR)) {
3919                         if (instance->hb_host_mem->HB.fwCounter !=
3920                             instance->hb_host_mem->HB.driverCounter) {
3921                                 instance->hb_host_mem->HB.driverCounter =
3922                                         instance->hb_host_mem->HB.fwCounter;
3923                                 hb_seconds_missed = 0;
3924                         } else {
3925                                 hb_seconds_missed++;
3926                                 if (hb_seconds_missed ==
3927                                     (MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF/HZ)) {
3928                                         dev_warn(&instance->pdev->dev, "SR-IOV:"
3929                                                " Heartbeat never completed "
3930                                                " while polling during I/O "
3931                                                " timeout handling for "
3932                                                "scsi%d.\n",
3933                                                instance->host->host_no);
3934                                                *convert = 1;
3935                                                retval = 1;
3936                                                goto out;
3937                                 }
3938                         }
3939                 }
3940
3941                 megasas_complete_cmd_dpc_fusion((unsigned long)instance);
3942                 outstanding = atomic_read(&instance->fw_outstanding);
3943                 if (!outstanding)
3944                         goto out;
3945
3946                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
3947                         dev_notice(&instance->pdev->dev, "[%2d]waiting for %d "
3948                                "commands to complete for scsi%d\n", i,
3949                                outstanding, instance->host->host_no);
3950                 }
3951                 msleep(1000);
3952         }
3953
3954         if (instance->snapdump_wait_time) {
3955                 megasas_trigger_snap_dump(instance);
3956                 retval = 1;
3957                 goto out;
3958         }
3959
3960         if (atomic_read(&instance->fw_outstanding)) {
3961                 dev_err(&instance->pdev->dev, "pending commands remain after waiting, "
3962                        "will reset adapter scsi%d.\n",
3963                        instance->host->host_no);
3964                 *convert = 1;
3965                 retval = 1;
3966         }
3967
3968 out:
3969         return retval;
3970 }
3971
3972 void  megasas_reset_reply_desc(struct megasas_instance *instance)
3973 {
3974         int i, j, count;
3975         struct fusion_context *fusion;
3976         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
3977
3978         fusion = instance->ctrl_context;
3979         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3980         for (i = 0 ; i < count ; i++) {
3981                 fusion->last_reply_idx[i] = 0;
3982                 reply_desc = fusion->reply_frames_desc[i];
3983                 for (j = 0 ; j < fusion->reply_q_depth; j++, reply_desc++)
3984                         reply_desc->Words = cpu_to_le64(ULLONG_MAX);
3985         }
3986 }
3987
3988 /*
3989  * megasas_refire_mgmt_cmd :    Re-fire management commands
3990  * @instance:                           Controller's soft instance
3991 */
3992 void megasas_refire_mgmt_cmd(struct megasas_instance *instance)
3993 {
3994         int j;
3995         struct megasas_cmd_fusion *cmd_fusion;
3996         struct fusion_context *fusion;
3997         struct megasas_cmd *cmd_mfi;
3998         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
3999         u16 smid;
4000         bool refire_cmd = 0;
4001         u8 result;
4002         u32 opcode = 0;
4003
4004         fusion = instance->ctrl_context;
4005
4006         /* Re-fire management commands.
4007          * Do not traverse complet MPT frame pool. Start from max_scsi_cmds.
4008          */
4009         for (j = instance->max_scsi_cmds ; j < instance->max_fw_cmds; j++) {
4010                 cmd_fusion = fusion->cmd_list[j];
4011                 cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
4012                 smid = le16_to_cpu(cmd_mfi->context.smid);
4013                 result = REFIRE_CMD;
4014
4015                 if (!smid)
4016                         continue;
4017
4018                 req_desc = megasas_get_request_descriptor(instance, smid - 1);
4019
4020                 switch (cmd_mfi->frame->hdr.cmd) {
4021                 case MFI_CMD_DCMD:
4022                         opcode = le32_to_cpu(cmd_mfi->frame->dcmd.opcode);
4023                          /* Do not refire shutdown command */
4024                         if (opcode == MR_DCMD_CTRL_SHUTDOWN) {
4025                                 cmd_mfi->frame->dcmd.cmd_status = MFI_STAT_OK;
4026                                 result = COMPLETE_CMD;
4027                                 break;
4028                         }
4029
4030                         refire_cmd = ((opcode != MR_DCMD_LD_MAP_GET_INFO)) &&
4031                                       (opcode != MR_DCMD_SYSTEM_PD_MAP_GET_INFO) &&
4032                                       !(cmd_mfi->flags & DRV_DCMD_SKIP_REFIRE);
4033
4034                         if (!refire_cmd)
4035                                 result = RETURN_CMD;
4036
4037                         break;
4038                 case MFI_CMD_NVME:
4039                         if (!instance->support_nvme_passthru) {
4040                                 cmd_mfi->frame->hdr.cmd_status = MFI_STAT_INVALID_CMD;
4041                                 result = COMPLETE_CMD;
4042                         }
4043
4044                         break;
4045                 default:
4046                         break;
4047                 }
4048
4049                 switch (result) {
4050                 case REFIRE_CMD:
4051                         megasas_fire_cmd_fusion(instance, req_desc);
4052                         break;
4053                 case RETURN_CMD:
4054                         megasas_return_cmd(instance, cmd_mfi);
4055                         break;
4056                 case COMPLETE_CMD:
4057                         megasas_complete_cmd(instance, cmd_mfi, DID_OK);
4058                         break;
4059                 }
4060         }
4061 }
4062
4063 /*
4064  * megasas_track_scsiio : Track SCSI IOs outstanding to a SCSI device
4065  * @instance: per adapter struct
4066  * @channel: the channel assigned by the OS
4067  * @id: the id assigned by the OS
4068  *
4069  * Returns SUCCESS if no IOs pending to SCSI device, else return FAILED
4070  */
4071
4072 static int megasas_track_scsiio(struct megasas_instance *instance,
4073                 int id, int channel)
4074 {
4075         int i, found = 0;
4076         struct megasas_cmd_fusion *cmd_fusion;
4077         struct fusion_context *fusion;
4078         fusion = instance->ctrl_context;
4079
4080         for (i = 0 ; i < instance->max_scsi_cmds; i++) {
4081                 cmd_fusion = fusion->cmd_list[i];
4082                 if (cmd_fusion->scmd &&
4083                         (cmd_fusion->scmd->device->id == id &&
4084                         cmd_fusion->scmd->device->channel == channel)) {
4085                         dev_info(&instance->pdev->dev,
4086                                 "SCSI commands pending to target"
4087                                 "channel %d id %d \tSMID: 0x%x\n",
4088                                 channel, id, cmd_fusion->index);
4089                         scsi_print_command(cmd_fusion->scmd);
4090                         found = 1;
4091                         break;
4092                 }
4093         }
4094
4095         return found ? FAILED : SUCCESS;
4096 }
4097
4098 /**
4099  * megasas_tm_response_code - translation of device response code
4100  * @ioc: per adapter object
4101  * @mpi_reply: MPI reply returned by firmware
4102  *
4103  * Return nothing.
4104  */
4105 static void
4106 megasas_tm_response_code(struct megasas_instance *instance,
4107                 struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply)
4108 {
4109         char *desc;
4110
4111         switch (mpi_reply->ResponseCode) {
4112         case MPI2_SCSITASKMGMT_RSP_TM_COMPLETE:
4113                 desc = "task management request completed";
4114                 break;
4115         case MPI2_SCSITASKMGMT_RSP_INVALID_FRAME:
4116                 desc = "invalid frame";
4117                 break;
4118         case MPI2_SCSITASKMGMT_RSP_TM_NOT_SUPPORTED:
4119                 desc = "task management request not supported";
4120                 break;
4121         case MPI2_SCSITASKMGMT_RSP_TM_FAILED:
4122                 desc = "task management request failed";
4123                 break;
4124         case MPI2_SCSITASKMGMT_RSP_TM_SUCCEEDED:
4125                 desc = "task management request succeeded";
4126                 break;
4127         case MPI2_SCSITASKMGMT_RSP_TM_INVALID_LUN:
4128                 desc = "invalid lun";
4129                 break;
4130         case 0xA:
4131                 desc = "overlapped tag attempted";
4132                 break;
4133         case MPI2_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC:
4134                 desc = "task queued, however not sent to target";
4135                 break;
4136         default:
4137                 desc = "unknown";
4138                 break;
4139         }
4140         dev_dbg(&instance->pdev->dev, "response_code(%01x): %s\n",
4141                 mpi_reply->ResponseCode, desc);
4142         dev_dbg(&instance->pdev->dev,
4143                 "TerminationCount/DevHandle/Function/TaskType/IOCStat/IOCLoginfo"
4144                 " 0x%x/0x%x/0x%x/0x%x/0x%x/0x%x\n",
4145                 mpi_reply->TerminationCount, mpi_reply->DevHandle,
4146                 mpi_reply->Function, mpi_reply->TaskType,
4147                 mpi_reply->IOCStatus, mpi_reply->IOCLogInfo);
4148 }
4149
4150 /**
4151  * megasas_issue_tm - main routine for sending tm requests
4152  * @instance: per adapter struct
4153  * @device_handle: device handle
4154  * @channel: the channel assigned by the OS
4155  * @id: the id assigned by the OS
4156  * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in megaraid_sas_fusion.c)
4157  * @smid_task: smid assigned to the task
4158  * @m_type: TM_MUTEX_ON or TM_MUTEX_OFF
4159  * Context: user
4160  *
4161  * MegaRaid use MPT interface for Task Magement request.
4162  * A generic API for sending task management requests to firmware.
4163  *
4164  * Return SUCCESS or FAILED.
4165  */
4166 static int
4167 megasas_issue_tm(struct megasas_instance *instance, u16 device_handle,
4168         uint channel, uint id, u16 smid_task, u8 type,
4169         struct MR_PRIV_DEVICE *mr_device_priv_data)
4170 {
4171         struct MR_TASK_MANAGE_REQUEST *mr_request;
4172         struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_request;
4173         unsigned long timeleft;
4174         struct megasas_cmd_fusion *cmd_fusion;
4175         struct megasas_cmd *cmd_mfi;
4176         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
4177         struct fusion_context *fusion = NULL;
4178         struct megasas_cmd_fusion *scsi_lookup;
4179         int rc;
4180         int timeout = MEGASAS_DEFAULT_TM_TIMEOUT;
4181         struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply;
4182
4183         fusion = instance->ctrl_context;
4184
4185         cmd_mfi = megasas_get_cmd(instance);
4186
4187         if (!cmd_mfi) {
4188                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
4189                         __func__, __LINE__);
4190                 return -ENOMEM;
4191         }
4192
4193         cmd_fusion = megasas_get_cmd_fusion(instance,
4194                         instance->max_scsi_cmds + cmd_mfi->index);
4195
4196         /*  Save the smid. To be used for returning the cmd */
4197         cmd_mfi->context.smid = cmd_fusion->index;
4198
4199         req_desc = megasas_get_request_descriptor(instance,
4200                         (cmd_fusion->index - 1));
4201
4202         cmd_fusion->request_desc = req_desc;
4203         req_desc->Words = 0;
4204
4205         mr_request = (struct MR_TASK_MANAGE_REQUEST *) cmd_fusion->io_request;
4206         memset(mr_request, 0, sizeof(struct MR_TASK_MANAGE_REQUEST));
4207         mpi_request = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *) &mr_request->TmRequest;
4208         mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
4209         mpi_request->DevHandle = cpu_to_le16(device_handle);
4210         mpi_request->TaskType = type;
4211         mpi_request->TaskMID = cpu_to_le16(smid_task);
4212         mpi_request->LUN[1] = 0;
4213
4214
4215         req_desc = cmd_fusion->request_desc;
4216         req_desc->HighPriority.SMID = cpu_to_le16(cmd_fusion->index);
4217         req_desc->HighPriority.RequestFlags =
4218                 (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
4219                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
4220         req_desc->HighPriority.MSIxIndex =  0;
4221         req_desc->HighPriority.LMID = 0;
4222         req_desc->HighPriority.Reserved1 = 0;
4223
4224         if (channel < MEGASAS_MAX_PD_CHANNELS)
4225                 mr_request->tmReqFlags.isTMForPD = 1;
4226         else
4227                 mr_request->tmReqFlags.isTMForLD = 1;
4228
4229         init_completion(&cmd_fusion->done);
4230         megasas_fire_cmd_fusion(instance, req_desc);
4231
4232         switch (type) {
4233         case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
4234                 timeout = mr_device_priv_data->task_abort_tmo;
4235                 break;
4236         case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
4237                 timeout = mr_device_priv_data->target_reset_tmo;
4238                 break;
4239         }
4240
4241         timeleft = wait_for_completion_timeout(&cmd_fusion->done, timeout * HZ);
4242
4243         if (!timeleft) {
4244                 dev_err(&instance->pdev->dev,
4245                         "task mgmt type 0x%x timed out\n", type);
4246                 cmd_mfi->flags |= DRV_DCMD_SKIP_REFIRE;
4247                 mutex_unlock(&instance->reset_mutex);
4248                 rc = megasas_reset_fusion(instance->host, MFI_IO_TIMEOUT_OCR);
4249                 mutex_lock(&instance->reset_mutex);
4250                 return rc;
4251         }
4252
4253         mpi_reply = (struct MPI2_SCSI_TASK_MANAGE_REPLY *) &mr_request->TMReply;
4254         megasas_tm_response_code(instance, mpi_reply);
4255
4256         megasas_return_cmd(instance, cmd_mfi);
4257         rc = SUCCESS;
4258         switch (type) {
4259         case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
4260                 scsi_lookup = fusion->cmd_list[smid_task - 1];
4261
4262                 if (scsi_lookup->scmd == NULL)
4263                         break;
4264                 else {
4265                         instance->instancet->disable_intr(instance);
4266                         megasas_sync_irqs((unsigned long)instance);
4267                         instance->instancet->enable_intr(instance);
4268                         if (scsi_lookup->scmd == NULL)
4269                                 break;
4270                 }
4271                 rc = FAILED;
4272                 break;
4273
4274         case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
4275                 if ((channel == 0xFFFFFFFF) && (id == 0xFFFFFFFF))
4276                         break;
4277                 instance->instancet->disable_intr(instance);
4278                 megasas_sync_irqs((unsigned long)instance);
4279                 rc = megasas_track_scsiio(instance, id, channel);
4280                 instance->instancet->enable_intr(instance);
4281
4282                 break;
4283         case MPI2_SCSITASKMGMT_TASKTYPE_ABRT_TASK_SET:
4284         case MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK:
4285                 break;
4286         default:
4287                 rc = FAILED;
4288                 break;
4289         }
4290
4291         return rc;
4292
4293 }
4294
4295 /*
4296  * megasas_fusion_smid_lookup : Look for fusion command correpspodning to SCSI
4297  * @instance: per adapter struct
4298  *
4299  * Return Non Zero index, if SMID found in outstanding commands
4300  */
4301 static u16 megasas_fusion_smid_lookup(struct scsi_cmnd *scmd)
4302 {
4303         int i, ret = 0;
4304         struct megasas_instance *instance;
4305         struct megasas_cmd_fusion *cmd_fusion;
4306         struct fusion_context *fusion;
4307
4308         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4309
4310         fusion = instance->ctrl_context;
4311
4312         for (i = 0; i < instance->max_scsi_cmds; i++) {
4313                 cmd_fusion = fusion->cmd_list[i];
4314                 if (cmd_fusion->scmd && (cmd_fusion->scmd == scmd)) {
4315                         scmd_printk(KERN_NOTICE, scmd, "Abort request is for"
4316                                 " SMID: %d\n", cmd_fusion->index);
4317                         ret = cmd_fusion->index;
4318                         break;
4319                 }
4320         }
4321
4322         return ret;
4323 }
4324
4325 /*
4326 * megasas_get_tm_devhandle - Get devhandle for TM request
4327 * @sdev-                     OS provided scsi device
4328 *
4329 * Returns-                   devhandle/targetID of SCSI device
4330 */
4331 static u16 megasas_get_tm_devhandle(struct scsi_device *sdev)
4332 {
4333         u16 pd_index = 0;
4334         u32 device_id;
4335         struct megasas_instance *instance;
4336         struct fusion_context *fusion;
4337         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
4338         u16 devhandle = (u16)ULONG_MAX;
4339
4340         instance = (struct megasas_instance *)sdev->host->hostdata;
4341         fusion = instance->ctrl_context;
4342
4343         if (!MEGASAS_IS_LOGICAL(sdev)) {
4344                 if (instance->use_seqnum_jbod_fp) {
4345                         pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
4346                                     + sdev->id;
4347                         pd_sync = (void *)fusion->pd_seq_sync
4348                                         [(instance->pd_seq_map_id - 1) & 1];
4349                         devhandle = pd_sync->seq[pd_index].devHandle;
4350                 } else
4351                         sdev_printk(KERN_ERR, sdev, "Firmware expose tmCapable"
4352                                 " without JBOD MAP support from %s %d\n", __func__, __LINE__);
4353         } else {
4354                 device_id = ((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL)
4355                                 + sdev->id;
4356                 devhandle = device_id;
4357         }
4358
4359         return devhandle;
4360 }
4361
4362 /*
4363  * megasas_task_abort_fusion : SCSI task abort function for fusion adapters
4364  * @scmd : pointer to scsi command object
4365  *
4366  * Return SUCCESS, if command aborted else FAILED
4367  */
4368
4369 int megasas_task_abort_fusion(struct scsi_cmnd *scmd)
4370 {
4371         struct megasas_instance *instance;
4372         u16 smid, devhandle;
4373         int ret;
4374         struct MR_PRIV_DEVICE *mr_device_priv_data;
4375         mr_device_priv_data = scmd->device->hostdata;
4376
4377         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4378
4379         scmd_printk(KERN_INFO, scmd, "task abort called for scmd(%p)\n", scmd);
4380         scsi_print_command(scmd);
4381
4382         if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
4383                 dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL,"
4384                 "SCSI host:%d\n", instance->host->host_no);
4385                 ret = FAILED;
4386                 return ret;
4387         }
4388
4389         if (!mr_device_priv_data) {
4390                 sdev_printk(KERN_INFO, scmd->device, "device been deleted! "
4391                         "scmd(%p)\n", scmd);
4392                 scmd->result = DID_NO_CONNECT << 16;
4393                 ret = SUCCESS;
4394                 goto out;
4395         }
4396
4397         if (!mr_device_priv_data->is_tm_capable) {
4398                 ret = FAILED;
4399                 goto out;
4400         }
4401
4402         mutex_lock(&instance->reset_mutex);
4403
4404         smid = megasas_fusion_smid_lookup(scmd);
4405
4406         if (!smid) {
4407                 ret = SUCCESS;
4408                 scmd_printk(KERN_NOTICE, scmd, "Command for which abort is"
4409                         " issued is not found in outstanding commands\n");
4410                 mutex_unlock(&instance->reset_mutex);
4411                 goto out;
4412         }
4413
4414         devhandle = megasas_get_tm_devhandle(scmd->device);
4415
4416         if (devhandle == (u16)ULONG_MAX) {
4417                 ret = SUCCESS;
4418                 sdev_printk(KERN_INFO, scmd->device,
4419                         "task abort issued for invalid devhandle\n");
4420                 mutex_unlock(&instance->reset_mutex);
4421                 goto out;
4422         }
4423         sdev_printk(KERN_INFO, scmd->device,
4424                 "attempting task abort! scmd(%p) tm_dev_handle 0x%x\n",
4425                 scmd, devhandle);
4426
4427         mr_device_priv_data->tm_busy = 1;
4428         ret = megasas_issue_tm(instance, devhandle,
4429                         scmd->device->channel, scmd->device->id, smid,
4430                         MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK,
4431                         mr_device_priv_data);
4432         mr_device_priv_data->tm_busy = 0;
4433
4434         mutex_unlock(&instance->reset_mutex);
4435 out:
4436         sdev_printk(KERN_INFO, scmd->device, "task abort: %s scmd(%p)\n",
4437                         ((ret == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);
4438
4439         return ret;
4440 }
4441
4442 /*
4443  * megasas_reset_target_fusion : target reset function for fusion adapters
4444  * scmd: SCSI command pointer
4445  *
4446  * Returns SUCCESS if all commands associated with target aborted else FAILED
4447  */
4448
4449 int megasas_reset_target_fusion(struct scsi_cmnd *scmd)
4450 {
4451
4452         struct megasas_instance *instance;
4453         int ret = FAILED;
4454         u16 devhandle;
4455         struct MR_PRIV_DEVICE *mr_device_priv_data;
4456         mr_device_priv_data = scmd->device->hostdata;
4457
4458         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4459
4460         sdev_printk(KERN_INFO, scmd->device,
4461                     "target reset called for scmd(%p)\n", scmd);
4462
4463         if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
4464                 dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL,"
4465                 "SCSI host:%d\n", instance->host->host_no);
4466                 ret = FAILED;
4467                 return ret;
4468         }
4469
4470         if (!mr_device_priv_data) {
4471                 sdev_printk(KERN_INFO, scmd->device, "device been deleted! "
4472                         "scmd(%p)\n", scmd);
4473                 scmd->result = DID_NO_CONNECT << 16;
4474                 ret = SUCCESS;
4475                 goto out;
4476         }
4477
4478         if (!mr_device_priv_data->is_tm_capable) {
4479                 ret = FAILED;
4480                 goto out;
4481         }
4482
4483         mutex_lock(&instance->reset_mutex);
4484         devhandle = megasas_get_tm_devhandle(scmd->device);
4485
4486         if (devhandle == (u16)ULONG_MAX) {
4487                 ret = SUCCESS;
4488                 sdev_printk(KERN_INFO, scmd->device,
4489                         "target reset issued for invalid devhandle\n");
4490                 mutex_unlock(&instance->reset_mutex);
4491                 goto out;
4492         }
4493
4494         sdev_printk(KERN_INFO, scmd->device,
4495                 "attempting target reset! scmd(%p) tm_dev_handle 0x%x\n",
4496                 scmd, devhandle);
4497         mr_device_priv_data->tm_busy = 1;
4498         ret = megasas_issue_tm(instance, devhandle,
4499                         scmd->device->channel, scmd->device->id, 0,
4500                         MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET,
4501                         mr_device_priv_data);
4502         mr_device_priv_data->tm_busy = 0;
4503         mutex_unlock(&instance->reset_mutex);
4504 out:
4505         scmd_printk(KERN_NOTICE, scmd, "megasas: target reset %s!!\n",
4506                 (ret == SUCCESS) ? "SUCCESS" : "FAILED");
4507
4508         return ret;
4509 }
4510
4511 /*SRIOV get other instance in cluster if any*/
4512 struct megasas_instance *megasas_get_peer_instance(struct megasas_instance *instance)
4513 {
4514         int i;
4515
4516         for (i = 0; i < MAX_MGMT_ADAPTERS; i++) {
4517                 if (megasas_mgmt_info.instance[i] &&
4518                         (megasas_mgmt_info.instance[i] != instance) &&
4519                          megasas_mgmt_info.instance[i]->requestorId &&
4520                          megasas_mgmt_info.instance[i]->peerIsPresent &&
4521                         (memcmp((megasas_mgmt_info.instance[i]->clusterId),
4522                         instance->clusterId, MEGASAS_CLUSTER_ID_SIZE) == 0))
4523                         return megasas_mgmt_info.instance[i];
4524         }
4525         return NULL;
4526 }
4527
4528 /* Check for a second path that is currently UP */
4529 int megasas_check_mpio_paths(struct megasas_instance *instance,
4530         struct scsi_cmnd *scmd)
4531 {
4532         struct megasas_instance *peer_instance = NULL;
4533         int retval = (DID_REQUEUE << 16);
4534
4535         if (instance->peerIsPresent) {
4536                 peer_instance = megasas_get_peer_instance(instance);
4537                 if ((peer_instance) &&
4538                         (atomic_read(&peer_instance->adprecovery) ==
4539                         MEGASAS_HBA_OPERATIONAL))
4540                         retval = (DID_NO_CONNECT << 16);
4541         }
4542         return retval;
4543 }
4544
4545 /* Core fusion reset function */
4546 int megasas_reset_fusion(struct Scsi_Host *shost, int reason)
4547 {
4548         int retval = SUCCESS, i, j, convert = 0;
4549         struct megasas_instance *instance;
4550         struct megasas_cmd_fusion *cmd_fusion, *r1_cmd;
4551         struct fusion_context *fusion;
4552         u32 abs_state, status_reg, reset_adapter;
4553         u32 io_timeout_in_crash_mode = 0;
4554         struct scsi_cmnd *scmd_local = NULL;
4555         struct scsi_device *sdev;
4556         int ret_target_prop = DCMD_FAILED;
4557         bool is_target_prop = false;
4558
4559         instance = (struct megasas_instance *)shost->hostdata;
4560         fusion = instance->ctrl_context;
4561
4562         mutex_lock(&instance->reset_mutex);
4563
4564         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
4565                 dev_warn(&instance->pdev->dev, "Hardware critical error, "
4566                        "returning FAILED for scsi%d.\n",
4567                         instance->host->host_no);
4568                 mutex_unlock(&instance->reset_mutex);
4569                 return FAILED;
4570         }
4571         status_reg = instance->instancet->read_fw_status_reg(instance);
4572         abs_state = status_reg & MFI_STATE_MASK;
4573
4574         /* IO timeout detected, forcibly put FW in FAULT state */
4575         if (abs_state != MFI_STATE_FAULT && instance->crash_dump_buf &&
4576                 instance->crash_dump_app_support && reason) {
4577                 dev_info(&instance->pdev->dev, "IO/DCMD timeout is detected, "
4578                         "forcibly FAULT Firmware\n");
4579                 atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
4580                 status_reg = megasas_readl(instance, &instance->reg_set->doorbell);
4581                 writel(status_reg | MFI_STATE_FORCE_OCR,
4582                         &instance->reg_set->doorbell);
4583                 readl(&instance->reg_set->doorbell);
4584                 mutex_unlock(&instance->reset_mutex);
4585                 do {
4586                         ssleep(3);
4587                         io_timeout_in_crash_mode++;
4588                         dev_dbg(&instance->pdev->dev, "waiting for [%d] "
4589                                 "seconds for crash dump collection and OCR "
4590                                 "to be done\n", (io_timeout_in_crash_mode * 3));
4591                 } while ((atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) &&
4592                         (io_timeout_in_crash_mode < 80));
4593
4594                 if (atomic_read(&instance->adprecovery) == MEGASAS_HBA_OPERATIONAL) {
4595                         dev_info(&instance->pdev->dev, "OCR done for IO "
4596                                 "timeout case\n");
4597                         retval = SUCCESS;
4598                 } else {
4599                         dev_info(&instance->pdev->dev, "Controller is not "
4600                                 "operational after 240 seconds wait for IO "
4601                                 "timeout case in FW crash dump mode\n do "
4602                                 "OCR/kill adapter\n");
4603                         retval = megasas_reset_fusion(shost, 0);
4604                 }
4605                 return retval;
4606         }
4607
4608         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
4609                 del_timer_sync(&instance->sriov_heartbeat_timer);
4610         set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
4611         atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_POLLING);
4612         instance->instancet->disable_intr(instance);
4613         megasas_sync_irqs((unsigned long)instance);
4614
4615         /* First try waiting for commands to complete */
4616         if (megasas_wait_for_outstanding_fusion(instance, reason,
4617                                                 &convert)) {
4618                 atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
4619                 dev_warn(&instance->pdev->dev, "resetting fusion "
4620                        "adapter scsi%d.\n", instance->host->host_no);
4621                 if (convert)
4622                         reason = 0;
4623
4624                 if (megasas_dbg_lvl & OCR_LOGS)
4625                         dev_info(&instance->pdev->dev, "\nPending SCSI commands:\n");
4626
4627                 /* Now return commands back to the OS */
4628                 for (i = 0 ; i < instance->max_scsi_cmds; i++) {
4629                         cmd_fusion = fusion->cmd_list[i];
4630                         /*check for extra commands issued by driver*/
4631                         if (instance->adapter_type >= VENTURA_SERIES) {
4632                                 r1_cmd = fusion->cmd_list[i + instance->max_fw_cmds];
4633                                 megasas_return_cmd_fusion(instance, r1_cmd);
4634                         }
4635                         scmd_local = cmd_fusion->scmd;
4636                         if (cmd_fusion->scmd) {
4637                                 if (megasas_dbg_lvl & OCR_LOGS) {
4638                                         sdev_printk(KERN_INFO,
4639                                                 cmd_fusion->scmd->device, "SMID: 0x%x\n",
4640                                                 cmd_fusion->index);
4641                                         scsi_print_command(cmd_fusion->scmd);
4642                                 }
4643
4644                                 scmd_local->result =
4645                                         megasas_check_mpio_paths(instance,
4646                                                         scmd_local);
4647                                 if (instance->ldio_threshold &&
4648                                         megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
4649                                         atomic_dec(&instance->ldio_outstanding);
4650                                 megasas_return_cmd_fusion(instance, cmd_fusion);
4651                                 scsi_dma_unmap(scmd_local);
4652                                 scmd_local->scsi_done(scmd_local);
4653                         }
4654                 }
4655
4656                 atomic_set(&instance->fw_outstanding, 0);
4657
4658                 status_reg = instance->instancet->read_fw_status_reg(instance);
4659                 abs_state = status_reg & MFI_STATE_MASK;
4660                 reset_adapter = status_reg & MFI_RESET_ADAPTER;
4661                 if (instance->disableOnlineCtrlReset ||
4662                     (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
4663                         /* Reset not supported, kill adapter */
4664                         dev_warn(&instance->pdev->dev, "Reset not supported"
4665                                ", killing adapter scsi%d.\n",
4666                                 instance->host->host_no);
4667                         megaraid_sas_kill_hba(instance);
4668                         instance->skip_heartbeat_timer_del = 1;
4669                         retval = FAILED;
4670                         goto out;
4671                 }
4672
4673                 /* Let SR-IOV VF & PF sync up if there was a HB failure */
4674                 if (instance->requestorId && !reason) {
4675                         msleep(MEGASAS_OCR_SETTLE_TIME_VF);
4676                         goto transition_to_ready;
4677                 }
4678
4679                 /* Now try to reset the chip */
4680                 for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
4681
4682                         if (instance->instancet->adp_reset
4683                                 (instance, instance->reg_set))
4684                                 continue;
4685 transition_to_ready:
4686                         /* Wait for FW to become ready */
4687                         if (megasas_transition_to_ready(instance, 1)) {
4688                                 dev_warn(&instance->pdev->dev,
4689                                         "Failed to transition controller to ready for "
4690                                         "scsi%d.\n", instance->host->host_no);
4691                                 if (instance->requestorId && !reason)
4692                                         goto fail_kill_adapter;
4693                                 else
4694                                         continue;
4695                         }
4696                         megasas_reset_reply_desc(instance);
4697                         megasas_fusion_update_can_queue(instance, OCR_CONTEXT);
4698
4699                         if (megasas_ioc_init_fusion(instance)) {
4700                                 if (instance->requestorId && !reason)
4701                                         goto fail_kill_adapter;
4702                                 else
4703                                         continue;
4704                         }
4705
4706                         if (megasas_get_ctrl_info(instance)) {
4707                                 dev_info(&instance->pdev->dev,
4708                                         "Failed from %s %d\n",
4709                                         __func__, __LINE__);
4710                                 megaraid_sas_kill_hba(instance);
4711                                 retval = FAILED;
4712                                 goto out;
4713                         }
4714
4715                         megasas_refire_mgmt_cmd(instance);
4716
4717                         /* Reset load balance info */
4718                         if (fusion->load_balance_info)
4719                                 memset(fusion->load_balance_info, 0,
4720                                        (sizeof(struct LD_LOAD_BALANCE_INFO) *
4721                                        MAX_LOGICAL_DRIVES_EXT));
4722
4723                         if (!megasas_get_map_info(instance))
4724                                 megasas_sync_map_info(instance);
4725
4726                         megasas_setup_jbod_map(instance);
4727
4728                         /* reset stream detection array */
4729                         if (instance->adapter_type >= VENTURA_SERIES) {
4730                                 for (j = 0; j < MAX_LOGICAL_DRIVES_EXT; ++j) {
4731                                         memset(fusion->stream_detect_by_ld[j],
4732                                         0, sizeof(struct LD_STREAM_DETECT));
4733                                  fusion->stream_detect_by_ld[j]->mru_bit_map
4734                                                 = MR_STREAM_BITMAP;
4735                                 }
4736                         }
4737
4738                         clear_bit(MEGASAS_FUSION_IN_RESET,
4739                                   &instance->reset_flags);
4740                         instance->instancet->enable_intr(instance);
4741
4742                         shost_for_each_device(sdev, shost) {
4743                                 if ((instance->tgt_prop) &&
4744                                     (instance->nvme_page_size))
4745                                         ret_target_prop = megasas_get_target_prop(instance, sdev);
4746
4747                                 is_target_prop = (ret_target_prop == DCMD_SUCCESS) ? true : false;
4748                                 megasas_set_dynamic_target_properties(sdev, is_target_prop);
4749                         }
4750
4751                         atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
4752
4753                         dev_info(&instance->pdev->dev, "Interrupts are enabled and"
4754                                 " controller is OPERATIONAL for scsi:%d\n",
4755                                 instance->host->host_no);
4756
4757                         /* Restart SR-IOV heartbeat */
4758                         if (instance->requestorId) {
4759                                 if (!megasas_sriov_start_heartbeat(instance, 0))
4760                                         megasas_start_timer(instance);
4761                                 else
4762                                         instance->skip_heartbeat_timer_del = 1;
4763                         }
4764
4765                         if (instance->crash_dump_drv_support &&
4766                                 instance->crash_dump_app_support)
4767                                 megasas_set_crash_dump_params(instance,
4768                                         MR_CRASH_BUF_TURN_ON);
4769                         else
4770                                 megasas_set_crash_dump_params(instance,
4771                                         MR_CRASH_BUF_TURN_OFF);
4772
4773                         if (instance->snapdump_wait_time) {
4774                                 megasas_get_snapdump_properties(instance);
4775                                 dev_info(&instance->pdev->dev,
4776                                          "Snap dump wait time\t: %d\n",
4777                                          instance->snapdump_wait_time);
4778                         }
4779
4780                         retval = SUCCESS;
4781
4782                         /* Adapter reset completed successfully */
4783                         dev_warn(&instance->pdev->dev,
4784                                  "Reset successful for scsi%d.\n",
4785                                  instance->host->host_no);
4786
4787                         goto out;
4788                 }
4789 fail_kill_adapter:
4790                 /* Reset failed, kill the adapter */
4791                 dev_warn(&instance->pdev->dev, "Reset failed, killing "
4792                        "adapter scsi%d.\n", instance->host->host_no);
4793                 megaraid_sas_kill_hba(instance);
4794                 instance->skip_heartbeat_timer_del = 1;
4795                 retval = FAILED;
4796         } else {
4797                 /* For VF: Restart HB timer if we didn't OCR */
4798                 if (instance->requestorId) {
4799                         megasas_start_timer(instance);
4800                 }
4801                 clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
4802                 instance->instancet->enable_intr(instance);
4803                 atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
4804         }
4805 out:
4806         clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
4807         mutex_unlock(&instance->reset_mutex);
4808         return retval;
4809 }
4810
4811 /* Fusion Crash dump collection */
4812 void  megasas_fusion_crash_dump(struct megasas_instance *instance)
4813 {
4814         u32 status_reg;
4815         u8 partial_copy = 0;
4816         int wait = 0;
4817
4818
4819         status_reg = instance->instancet->read_fw_status_reg(instance);
4820
4821         /*
4822          * Allocate host crash buffers to copy data from 1 MB DMA crash buffer
4823          * to host crash buffers
4824          */
4825         if (instance->drv_buf_index == 0) {
4826                 /* Buffer is already allocated for old Crash dump.
4827                  * Do OCR and do not wait for crash dump collection
4828                  */
4829                 if (instance->drv_buf_alloc) {
4830                         dev_info(&instance->pdev->dev, "earlier crash dump is "
4831                                 "not yet copied by application, ignoring this "
4832                                 "crash dump and initiating OCR\n");
4833                         status_reg |= MFI_STATE_CRASH_DUMP_DONE;
4834                         writel(status_reg,
4835                                 &instance->reg_set->outbound_scratch_pad_0);
4836                         readl(&instance->reg_set->outbound_scratch_pad_0);
4837                         return;
4838                 }
4839                 megasas_alloc_host_crash_buffer(instance);
4840                 dev_info(&instance->pdev->dev, "Number of host crash buffers "
4841                         "allocated: %d\n", instance->drv_buf_alloc);
4842         }
4843
4844         while (!(status_reg & MFI_STATE_CRASH_DUMP_DONE) &&
4845                (wait < MEGASAS_WATCHDOG_WAIT_COUNT)) {
4846                 if (!(status_reg & MFI_STATE_DMADONE)) {
4847                         /*
4848                          * Next crash dump buffer is not yet DMA'd by FW
4849                          * Check after 10ms. Wait for 1 second for FW to
4850                          * post the next buffer. If not bail out.
4851                          */
4852                         wait++;
4853                         msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
4854                         status_reg = instance->instancet->read_fw_status_reg(
4855                                         instance);
4856                         continue;
4857                 }
4858
4859                 wait = 0;
4860                 if (instance->drv_buf_index >= instance->drv_buf_alloc) {
4861                         dev_info(&instance->pdev->dev,
4862                                  "Driver is done copying the buffer: %d\n",
4863                                  instance->drv_buf_alloc);
4864                         status_reg |= MFI_STATE_CRASH_DUMP_DONE;
4865                         partial_copy = 1;
4866                         break;
4867                 } else {
4868                         memcpy(instance->crash_buf[instance->drv_buf_index],
4869                                instance->crash_dump_buf, CRASH_DMA_BUF_SIZE);
4870                         instance->drv_buf_index++;
4871                         status_reg &= ~MFI_STATE_DMADONE;
4872                 }
4873
4874                 writel(status_reg, &instance->reg_set->outbound_scratch_pad_0);
4875                 readl(&instance->reg_set->outbound_scratch_pad_0);
4876
4877                 msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
4878                 status_reg = instance->instancet->read_fw_status_reg(instance);
4879         }
4880
4881         if (status_reg & MFI_STATE_CRASH_DUMP_DONE) {
4882                 dev_info(&instance->pdev->dev, "Crash Dump is available,number "
4883                         "of copied buffers: %d\n", instance->drv_buf_index);
4884                 instance->fw_crash_buffer_size =  instance->drv_buf_index;
4885                 instance->fw_crash_state = AVAILABLE;
4886                 instance->drv_buf_index = 0;
4887                 writel(status_reg, &instance->reg_set->outbound_scratch_pad_0);
4888                 readl(&instance->reg_set->outbound_scratch_pad_0);
4889                 if (!partial_copy)
4890                         megasas_reset_fusion(instance->host, 0);
4891         }
4892 }
4893
4894
4895 /* Fusion OCR work queue */
4896 void megasas_fusion_ocr_wq(struct work_struct *work)
4897 {
4898         struct megasas_instance *instance =
4899                 container_of(work, struct megasas_instance, work_init);
4900
4901         megasas_reset_fusion(instance->host, 0);
4902 }
4903
4904 /* Allocate fusion context */
4905 int
4906 megasas_alloc_fusion_context(struct megasas_instance *instance)
4907 {
4908         struct fusion_context *fusion;
4909
4910         instance->ctrl_context = kzalloc(sizeof(struct fusion_context),
4911                                          GFP_KERNEL);
4912         if (!instance->ctrl_context) {
4913                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
4914                         __func__, __LINE__);
4915                 return -ENOMEM;
4916         }
4917
4918         fusion = instance->ctrl_context;
4919
4920         fusion->log_to_span_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
4921                                               sizeof(LD_SPAN_INFO));
4922         fusion->log_to_span =
4923                 (PLD_SPAN_INFO)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
4924                                                 fusion->log_to_span_pages);
4925         if (!fusion->log_to_span) {
4926                 fusion->log_to_span =
4927                         vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT,
4928                                            sizeof(LD_SPAN_INFO)));
4929                 if (!fusion->log_to_span) {
4930                         dev_err(&instance->pdev->dev, "Failed from %s %d\n",
4931                                 __func__, __LINE__);
4932                         return -ENOMEM;
4933                 }
4934         }
4935
4936         fusion->load_balance_info_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
4937                 sizeof(struct LD_LOAD_BALANCE_INFO));
4938         fusion->load_balance_info =
4939                 (struct LD_LOAD_BALANCE_INFO *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
4940                 fusion->load_balance_info_pages);
4941         if (!fusion->load_balance_info) {
4942                 fusion->load_balance_info =
4943                         vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT,
4944                                            sizeof(struct LD_LOAD_BALANCE_INFO)));
4945                 if (!fusion->load_balance_info)
4946                         dev_err(&instance->pdev->dev, "Failed to allocate load_balance_info, "
4947                                 "continuing without Load Balance support\n");
4948         }
4949
4950         return 0;
4951 }
4952
4953 void
4954 megasas_free_fusion_context(struct megasas_instance *instance)
4955 {
4956         struct fusion_context *fusion = instance->ctrl_context;
4957
4958         if (fusion) {
4959                 if (fusion->load_balance_info) {
4960                         if (is_vmalloc_addr(fusion->load_balance_info))
4961                                 vfree(fusion->load_balance_info);
4962                         else
4963                                 free_pages((ulong)fusion->load_balance_info,
4964                                         fusion->load_balance_info_pages);
4965                 }
4966
4967                 if (fusion->log_to_span) {
4968                         if (is_vmalloc_addr(fusion->log_to_span))
4969                                 vfree(fusion->log_to_span);
4970                         else
4971                                 free_pages((ulong)fusion->log_to_span,
4972                                            fusion->log_to_span_pages);
4973                 }
4974
4975                 kfree(fusion);
4976         }
4977 }
4978
4979 struct megasas_instance_template megasas_instance_template_fusion = {
4980         .enable_intr = megasas_enable_intr_fusion,
4981         .disable_intr = megasas_disable_intr_fusion,
4982         .clear_intr = megasas_clear_intr_fusion,
4983         .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
4984         .adp_reset = megasas_adp_reset_fusion,
4985         .check_reset = megasas_check_reset_fusion,
4986         .service_isr = megasas_isr_fusion,
4987         .tasklet = megasas_complete_cmd_dpc_fusion,
4988         .init_adapter = megasas_init_adapter_fusion,
4989         .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
4990         .issue_dcmd = megasas_issue_dcmd_fusion,
4991 };