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 #include <linux/irq_poll.h>
  39
  40 #include <scsi/scsi.h>
  41 #include <scsi/scsi_cmnd.h>
  42 #include <scsi/scsi_device.h>
  43 #include <scsi/scsi_host.h>
  44 #include <scsi/scsi_dbg.h>
  45 #include <linux/dmi.h>
  46
  47 #include "megaraid_sas_fusion.h"
  48 #include "megaraid_sas.h"
  49
  50
  51 extern void megasas_free_cmds(struct megasas_instance *instance);
  52 extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
  53                                            *instance);
  54 extern void
  55 megasas_complete_cmd(struct megasas_instance *instance,
  56                      struct megasas_cmd *cmd, u8 alt_status);
  57 int
  58 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
  59               int seconds);
  60
  61 void
  62 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
  63 int megasas_alloc_cmds(struct megasas_instance *instance);
  64 int
  65 megasas_clear_intr_fusion(struct megasas_instance *instance);
  66 int
  67 megasas_issue_polled(struct megasas_instance *instance,
  68                      struct megasas_cmd *cmd);
  69 void
  70 megasas_check_and_restore_queue_depth(struct megasas_instance *instance);
  71
  72 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
  73 void megaraid_sas_kill_hba(struct megasas_instance *instance);
  74
  75 extern u32 megasas_dbg_lvl;
  76 int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
  77                                   int initial);
  78 void megasas_start_timer(struct megasas_instance *instance);
  79 extern struct megasas_mgmt_info megasas_mgmt_info;
  80 extern unsigned int resetwaittime;
  81 extern unsigned int dual_qdepth_disable;
  82 static void megasas_free_rdpq_fusion(struct megasas_instance *instance);
  83 static void megasas_free_reply_fusion(struct megasas_instance *instance);
  84 static inline
  85 void megasas_configure_queue_sizes(struct megasas_instance *instance);
  86 static void megasas_fusion_crash_dump(struct megasas_instance *instance);
  87 extern u32 megasas_readl(struct megasas_instance *instance,
  88                          const volatile void __iomem *addr);
  89
  90 /**
  91  * megasas_adp_reset_wait_for_ready -   initiate chip reset and wait for
  92  *                                      controller to come to ready state
  93  * @instance -                          adapter's soft state
  94  * @do_adp_reset -                      If true, do a chip reset
  95  * @ocr_context -                       If called from OCR context this will
  96  *                                      be set to 1, else 0
  97  *
  98  * This function initates a chip reset followed by a wait for controller to
  99  * transition to ready state.
 100  * During this, driver will block all access to PCI config space from userspace
 101  */
 102 int
 103 megasas_adp_reset_wait_for_ready(struct megasas_instance *instance,
 104                                  bool do_adp_reset,
 105                                  int ocr_context)
 106 {
 107         int ret = FAILED;
 108
 109         /*
 110          * Block access to PCI config space from userspace
 111          * when diag reset is initiated from driver
 112          */
 113         if (megasas_dbg_lvl & OCR_DEBUG)
 114                 dev_info(&instance->pdev->dev,
 115                          "Block access to PCI config space %s %d\n",
 116                          __func__, __LINE__);
 117
 118         pci_cfg_access_lock(instance->pdev);
 119
 120         if (do_adp_reset) {
 121                 if (instance->instancet->adp_reset
 122                         (instance, instance->reg_set))
 123                         goto out;
 124         }
 125
 126         /* Wait for FW to become ready */
 127         if (megasas_transition_to_ready(instance, ocr_context)) {
 128                 dev_warn(&instance->pdev->dev,
 129                          "Failed to transition controller to ready for scsi%d.\n",
 130                          instance->host->host_no);
 131                 goto out;
 132         }
 133
 134         ret = SUCCESS;
 135 out:
 136         if (megasas_dbg_lvl & OCR_DEBUG)
 137                 dev_info(&instance->pdev->dev,
 138                          "Unlock access to PCI config space %s %d\n",
 139                          __func__, __LINE__);
 140
 141         pci_cfg_access_unlock(instance->pdev);
 142
 143         return ret;
 144 }
 145
 146 /**
 147  * megasas_check_same_4gb_region -      check if allocation
 148  *                                      crosses same 4GB boundary or not
 149  * @instance -                          adapter's soft instance
 150  * start_addr -                 start address of DMA allocation
 151  * size -                               size of allocation in bytes
 152  * return -                             true : allocation does not cross same
 153  *                                      4GB boundary
 154  *                                      false: allocation crosses same
 155  *                                      4GB boundary
 156  */
 157 static inline bool megasas_check_same_4gb_region
 158         (struct megasas_instance *instance, dma_addr_t start_addr, size_t size)
 159 {
 160         dma_addr_t end_addr;
 161
 162         end_addr = start_addr + size;
 163
 164         if (upper_32_bits(start_addr) != upper_32_bits(end_addr)) {
 165                 dev_err(&instance->pdev->dev,
 166                         "Failed to get same 4GB boundary: start_addr: 0x%llx end_addr: 0x%llx\n",
 167                         (unsigned long long)start_addr,
 168                         (unsigned long long)end_addr);
 169                 return false;
 170         }
 171
 172         return true;
 173 }
 174
 175 /**
 176  * megasas_enable_intr_fusion - Enables interrupts
 177  * @regs:                       MFI register set
 178  */
 179 void
 180 megasas_enable_intr_fusion(struct megasas_instance *instance)
 181 {
 182         struct megasas_register_set __iomem *regs;
 183         regs = instance->reg_set;
 184
 185         instance->mask_interrupts = 0;
 186         /* For Thunderbolt/Invader also clear intr on enable */
 187         writel(~0, &regs->outbound_intr_status);
 188         readl(&regs->outbound_intr_status);
 189
 190         writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 191
 192         /* Dummy readl to force pci flush */
 193         dev_info(&instance->pdev->dev, "%s is called outbound_intr_mask:0x%08x\n",
 194                  __func__, readl(&regs->outbound_intr_mask));
 195 }
 196
 197 /**
 198  * megasas_disable_intr_fusion - Disables interrupt
 199  * @regs:                        MFI register set
 200  */
 201 void
 202 megasas_disable_intr_fusion(struct megasas_instance *instance)
 203 {
 204         u32 mask = 0xFFFFFFFF;
 205         struct megasas_register_set __iomem *regs;
 206         regs = instance->reg_set;
 207         instance->mask_interrupts = 1;
 208
 209         writel(mask, &regs->outbound_intr_mask);
 210         /* Dummy readl to force pci flush */
 211         dev_info(&instance->pdev->dev, "%s is called outbound_intr_mask:0x%08x\n",
 212                  __func__, readl(&regs->outbound_intr_mask));
 213 }
 214
 215 int
 216 megasas_clear_intr_fusion(struct megasas_instance *instance)
 217 {
 218         u32 status;
 219         struct megasas_register_set __iomem *regs;
 220         regs = instance->reg_set;
 221         /*
 222          * Check if it is our interrupt
 223          */
 224         status = megasas_readl(instance,
 225                                &regs->outbound_intr_status);
 226
 227         if (status & 1) {
 228                 writel(status, &regs->outbound_intr_status);
 229                 readl(&regs->outbound_intr_status);
 230                 return 1;
 231         }
 232         if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
 233                 return 0;
 234
 235         return 1;
 236 }
 237
 238 /**
 239  * megasas_get_cmd_fusion -     Get a command from the free pool
 240  * @instance:           Adapter soft state
 241  *
 242  * Returns a blk_tag indexed mpt frame
 243  */
 244 inline struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 245                                                   *instance, u32 blk_tag)
 246 {
 247         struct fusion_context *fusion;
 248
 249         fusion = instance->ctrl_context;
 250         return fusion->cmd_list[blk_tag];
 251 }
 252
 253 /**
 254  * megasas_return_cmd_fusion -  Return a cmd to free command pool
 255  * @instance:           Adapter soft state
 256  * @cmd:                Command packet to be returned to free command pool
 257  */
 258 inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
 259         struct megasas_cmd_fusion *cmd)
 260 {
 261         cmd->scmd = NULL;
 262         memset(cmd->io_request, 0, MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE);
 263         cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
 264         cmd->cmd_completed = false;
 265 }
 266
 267 /**
 268  * megasas_write_64bit_req_desc -       PCI writes 64bit request descriptor
 269  * @instance:                           Adapter soft state
 270  * @req_desc:                           64bit Request descriptor
 271  */
 272 static void
 273 megasas_write_64bit_req_desc(struct megasas_instance *instance,
 274                 union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc)
 275 {
 276 #if defined(writeq) && defined(CONFIG_64BIT)
 277         u64 req_data = (((u64)le32_to_cpu(req_desc->u.high) << 32) |
 278                 le32_to_cpu(req_desc->u.low));
 279         writeq(req_data, &instance->reg_set->inbound_low_queue_port);
 280 #else
 281         unsigned long flags;
 282         spin_lock_irqsave(&instance->hba_lock, flags);
 283         writel(le32_to_cpu(req_desc->u.low),
 284                 &instance->reg_set->inbound_low_queue_port);
 285         writel(le32_to_cpu(req_desc->u.high),
 286                 &instance->reg_set->inbound_high_queue_port);
 287         spin_unlock_irqrestore(&instance->hba_lock, flags);
 288 #endif
 289 }
 290
 291 /**
 292  * megasas_fire_cmd_fusion -    Sends command to the FW
 293  * @instance:                   Adapter soft state
 294  * @req_desc:                   32bit or 64bit Request descriptor
 295  *
 296  * Perform PCI Write. AERO SERIES supports 32 bit Descriptor.
 297  * Prior to AERO_SERIES support 64 bit Descriptor.
 298  */
 299 static void
 300 megasas_fire_cmd_fusion(struct megasas_instance *instance,
 301                 union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc)
 302 {
 303         if (instance->atomic_desc_support)
 304                 writel(le32_to_cpu(req_desc->u.low),
 305                         &instance->reg_set->inbound_single_queue_port);
 306         else
 307                 megasas_write_64bit_req_desc(instance, req_desc);
 308 }
 309
 310 /**
 311  * megasas_fusion_update_can_queue -    Do all Adapter Queue depth related calculations here
 312  * @instance:                                                   Adapter soft state
 313  * fw_boot_context:                                             Whether this function called during probe or after OCR
 314  *
 315  * This function is only for fusion controllers.
 316  * Update host can queue, if firmware downgrade max supported firmware commands.
 317  * Firmware upgrade case will be skiped because underlying firmware has
 318  * more resource than exposed to the OS.
 319  *
 320  */
 321 static void
 322 megasas_fusion_update_can_queue(struct megasas_instance *instance, int fw_boot_context)
 323 {
 324         u16 cur_max_fw_cmds = 0;
 325         u16 ldio_threshold = 0;
 326
 327         /* ventura FW does not fill outbound_scratch_pad_2 with queue depth */
 328         if (instance->adapter_type < VENTURA_SERIES)
 329                 cur_max_fw_cmds =
 330                 megasas_readl(instance,
 331                               &instance->reg_set->outbound_scratch_pad_2) & 0x00FFFF;
 332
 333         if (dual_qdepth_disable || !cur_max_fw_cmds)
 334                 cur_max_fw_cmds = instance->instancet->read_fw_status_reg(instance) & 0x00FFFF;
 335         else
 336                 ldio_threshold =
 337                         (instance->instancet->read_fw_status_reg(instance) & 0x00FFFF) - MEGASAS_FUSION_IOCTL_CMDS;
 338
 339         dev_info(&instance->pdev->dev,
 340                  "Current firmware supports maximum commands: %d\t LDIO threshold: %d\n",
 341                  cur_max_fw_cmds, ldio_threshold);
 342
 343         if (fw_boot_context == OCR_CONTEXT) {
 344                 cur_max_fw_cmds = cur_max_fw_cmds - 1;
 345                 if (cur_max_fw_cmds < instance->max_fw_cmds) {
 346                         instance->cur_can_queue =
 347                                 cur_max_fw_cmds - (MEGASAS_FUSION_INTERNAL_CMDS +
 348                                                 MEGASAS_FUSION_IOCTL_CMDS);
 349                         instance->host->can_queue = instance->cur_can_queue;
 350                         instance->ldio_threshold = ldio_threshold;
 351                 }
 352         } else {
 353                 instance->max_fw_cmds = cur_max_fw_cmds;
 354                 instance->ldio_threshold = ldio_threshold;
 355
 356                 if (reset_devices)
 357                         instance->max_fw_cmds = min(instance->max_fw_cmds,
 358                                                 (u16)MEGASAS_KDUMP_QUEUE_DEPTH);
 359                 /*
 360                 * Reduce the max supported cmds by 1. This is to ensure that the
 361                 * reply_q_sz (1 more than the max cmd that driver may send)
 362                 * does not exceed max cmds that the FW can support
 363                 */
 364                 instance->max_fw_cmds = instance->max_fw_cmds-1;
 365         }
 366 }
 367
 368 static inline void
 369 megasas_get_msix_index(struct megasas_instance *instance,
 370                        struct scsi_cmnd *scmd,
 371                        struct megasas_cmd_fusion *cmd,
 372                        u8 data_arms)
 373 {
 374         int sdev_busy;
 375
 376         /* nr_hw_queue = 1 for MegaRAID */
 377         struct blk_mq_hw_ctx *hctx =
 378                 scmd->device->request_queue->queue_hw_ctx[0];
 379
 380         sdev_busy = atomic_read(&hctx->nr_active);
 381
 382         if (instance->perf_mode == MR_BALANCED_PERF_MODE &&
 383             sdev_busy > (data_arms * MR_DEVICE_HIGH_IOPS_DEPTH))
 384                 cmd->request_desc->SCSIIO.MSIxIndex =
 385                         mega_mod64((atomic64_add_return(1, &instance->high_iops_outstanding) /
 386                                         MR_HIGH_IOPS_BATCH_COUNT), instance->low_latency_index_start);
 387         else if (instance->msix_load_balance)
 388                 cmd->request_desc->SCSIIO.MSIxIndex =
 389                         (mega_mod64(atomic64_add_return(1, &instance->total_io_count),
 390                                 instance->msix_vectors));
 391         else
 392                 cmd->request_desc->SCSIIO.MSIxIndex =
 393                         instance->reply_map[raw_smp_processor_id()];
 394 }
 395
 396 /**
 397  * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
 398  * @instance:           Adapter soft state
 399  */
 400 void
 401 megasas_free_cmds_fusion(struct megasas_instance *instance)
 402 {
 403         int i;
 404         struct fusion_context *fusion = instance->ctrl_context;
 405         struct megasas_cmd_fusion *cmd;
 406
 407         if (fusion->sense)
 408                 dma_pool_free(fusion->sense_dma_pool, fusion->sense,
 409                               fusion->sense_phys_addr);
 410
 411         /* SG */
 412         if (fusion->cmd_list) {
 413                 for (i = 0; i < instance->max_mpt_cmds; i++) {
 414                         cmd = fusion->cmd_list[i];
 415                         if (cmd) {
 416                                 if (cmd->sg_frame)
 417                                         dma_pool_free(fusion->sg_dma_pool,
 418                                                       cmd->sg_frame,
 419                                                       cmd->sg_frame_phys_addr);
 420                         }
 421                         kfree(cmd);
 422                 }
 423                 kfree(fusion->cmd_list);
 424         }
 425
 426         if (fusion->sg_dma_pool) {
 427                 dma_pool_destroy(fusion->sg_dma_pool);
 428                 fusion->sg_dma_pool = NULL;
 429         }
 430         if (fusion->sense_dma_pool) {
 431                 dma_pool_destroy(fusion->sense_dma_pool);
 432                 fusion->sense_dma_pool = NULL;
 433         }
 434
 435
 436         /* Reply Frame, Desc*/
 437         if (instance->is_rdpq)
 438                 megasas_free_rdpq_fusion(instance);
 439         else
 440                 megasas_free_reply_fusion(instance);
 441
 442         /* Request Frame, Desc*/
 443         if (fusion->req_frames_desc)
 444                 dma_free_coherent(&instance->pdev->dev,
 445                         fusion->request_alloc_sz, fusion->req_frames_desc,
 446                         fusion->req_frames_desc_phys);
 447         if (fusion->io_request_frames)
 448                 dma_pool_free(fusion->io_request_frames_pool,
 449                         fusion->io_request_frames,
 450                         fusion->io_request_frames_phys);
 451         if (fusion->io_request_frames_pool) {
 452                 dma_pool_destroy(fusion->io_request_frames_pool);
 453                 fusion->io_request_frames_pool = NULL;
 454         }
 455 }
 456
 457 /**
 458  * megasas_create_sg_sense_fusion -     Creates DMA pool for cmd frames
 459  * @instance:                   Adapter soft state
 460  *
 461  */
 462 static int megasas_create_sg_sense_fusion(struct megasas_instance *instance)
 463 {
 464         int i;
 465         u16 max_cmd;
 466         struct fusion_context *fusion;
 467         struct megasas_cmd_fusion *cmd;
 468         int sense_sz;
 469         u32 offset;
 470
 471         fusion = instance->ctrl_context;
 472         max_cmd = instance->max_fw_cmds;
 473         sense_sz = instance->max_mpt_cmds * SCSI_SENSE_BUFFERSIZE;
 474
 475         fusion->sg_dma_pool =
 476                         dma_pool_create("mr_sg", &instance->pdev->dev,
 477                                 instance->max_chain_frame_sz,
 478                                 MR_DEFAULT_NVME_PAGE_SIZE, 0);
 479         /* SCSI_SENSE_BUFFERSIZE  = 96 bytes */
 480         fusion->sense_dma_pool =
 481                         dma_pool_create("mr_sense", &instance->pdev->dev,
 482                                 sense_sz, 64, 0);
 483
 484         if (!fusion->sense_dma_pool || !fusion->sg_dma_pool) {
 485                 dev_err(&instance->pdev->dev,
 486                         "Failed from %s %d\n",  __func__, __LINE__);
 487                 return -ENOMEM;
 488         }
 489
 490         fusion->sense = dma_pool_alloc(fusion->sense_dma_pool,
 491                                        GFP_KERNEL, &fusion->sense_phys_addr);
 492         if (!fusion->sense) {
 493                 dev_err(&instance->pdev->dev,
 494                         "failed from %s %d\n",  __func__, __LINE__);
 495                 return -ENOMEM;
 496         }
 497
 498         /* sense buffer, request frame and reply desc pool requires to be in
 499          * same 4 gb region. Below function will check this.
 500          * In case of failure, new pci pool will be created with updated
 501          * alignment.
 502          * Older allocation and pool will be destroyed.
 503          * Alignment will be used such a way that next allocation if success,
 504          * will always meet same 4gb region requirement.
 505          * Actual requirement is not alignment, but we need start and end of
 506          * DMA address must have same upper 32 bit address.
 507          */
 508
 509         if (!megasas_check_same_4gb_region(instance, fusion->sense_phys_addr,
 510                                            sense_sz)) {
 511                 dma_pool_free(fusion->sense_dma_pool, fusion->sense,
 512                               fusion->sense_phys_addr);
 513                 fusion->sense = NULL;
 514                 dma_pool_destroy(fusion->sense_dma_pool);
 515
 516                 fusion->sense_dma_pool =
 517                         dma_pool_create("mr_sense_align", &instance->pdev->dev,
 518                                         sense_sz, roundup_pow_of_two(sense_sz),
 519                                         0);
 520                 if (!fusion->sense_dma_pool) {
 521                         dev_err(&instance->pdev->dev,
 522                                 "Failed from %s %d\n",  __func__, __LINE__);
 523                         return -ENOMEM;
 524                 }
 525                 fusion->sense = dma_pool_alloc(fusion->sense_dma_pool,
 526                                                GFP_KERNEL,
 527                                                &fusion->sense_phys_addr);
 528                 if (!fusion->sense) {
 529                         dev_err(&instance->pdev->dev,
 530                                 "failed from %s %d\n",  __func__, __LINE__);
 531                         return -ENOMEM;
 532                 }
 533         }
 534
 535         /*
 536          * Allocate and attach a frame to each of the commands in cmd_list
 537          */
 538         for (i = 0; i < max_cmd; i++) {
 539                 cmd = fusion->cmd_list[i];
 540                 cmd->sg_frame = dma_pool_alloc(fusion->sg_dma_pool,
 541                                         GFP_KERNEL, &cmd->sg_frame_phys_addr);
 542
 543                 offset = SCSI_SENSE_BUFFERSIZE * i;
 544                 cmd->sense = (u8 *)fusion->sense + offset;
 545                 cmd->sense_phys_addr = fusion->sense_phys_addr + offset;
 546
 547                 if (!cmd->sg_frame) {
 548                         dev_err(&instance->pdev->dev,
 549                                 "Failed from %s %d\n",  __func__, __LINE__);
 550                         return -ENOMEM;
 551                 }
 552         }
 553
 554         /* create sense buffer for the raid 1/10 fp */
 555         for (i = max_cmd; i < instance->max_mpt_cmds; i++) {
 556                 cmd = fusion->cmd_list[i];
 557                 offset = SCSI_SENSE_BUFFERSIZE * i;
 558                 cmd->sense = (u8 *)fusion->sense + offset;
 559                 cmd->sense_phys_addr = fusion->sense_phys_addr + offset;
 560
 561         }
 562
 563         return 0;
 564 }
 565
 566 static int
 567 megasas_alloc_cmdlist_fusion(struct megasas_instance *instance)
 568 {
 569         u32 max_mpt_cmd, i, j;
 570         struct fusion_context *fusion;
 571
 572         fusion = instance->ctrl_context;
 573
 574         max_mpt_cmd = instance->max_mpt_cmds;
 575
 576         /*
 577          * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
 578          * Allocate the dynamic array first and then allocate individual
 579          * commands.
 580          */
 581         fusion->cmd_list =
 582                 kcalloc(max_mpt_cmd, sizeof(struct megasas_cmd_fusion *),
 583                         GFP_KERNEL);
 584         if (!fusion->cmd_list) {
 585                 dev_err(&instance->pdev->dev,
 586                         "Failed from %s %d\n",  __func__, __LINE__);
 587                 return -ENOMEM;
 588         }
 589
 590         for (i = 0; i < max_mpt_cmd; i++) {
 591                 fusion->cmd_list[i] = kzalloc(sizeof(struct megasas_cmd_fusion),
 592                                               GFP_KERNEL);
 593                 if (!fusion->cmd_list[i]) {
 594                         for (j = 0; j < i; j++)
 595                                 kfree(fusion->cmd_list[j]);
 596                         kfree(fusion->cmd_list);
 597                         dev_err(&instance->pdev->dev,
 598                                 "Failed from %s %d\n",  __func__, __LINE__);
 599                         return -ENOMEM;
 600                 }
 601         }
 602
 603         return 0;
 604 }
 605
 606 static int
 607 megasas_alloc_request_fusion(struct megasas_instance *instance)
 608 {
 609         struct fusion_context *fusion;
 610
 611         fusion = instance->ctrl_context;
 612
 613 retry_alloc:
 614         fusion->io_request_frames_pool =
 615                         dma_pool_create("mr_ioreq", &instance->pdev->dev,
 616                                 fusion->io_frames_alloc_sz, 16, 0);
 617
 618         if (!fusion->io_request_frames_pool) {
 619                 dev_err(&instance->pdev->dev,
 620                         "Failed from %s %d\n",  __func__, __LINE__);
 621                 return -ENOMEM;
 622         }
 623
 624         fusion->io_request_frames =
 625                         dma_pool_alloc(fusion->io_request_frames_pool,
 626                                 GFP_KERNEL, &fusion->io_request_frames_phys);
 627         if (!fusion->io_request_frames) {
 628                 if (instance->max_fw_cmds >= (MEGASAS_REDUCE_QD_COUNT * 2)) {
 629                         instance->max_fw_cmds -= MEGASAS_REDUCE_QD_COUNT;
 630                         dma_pool_destroy(fusion->io_request_frames_pool);
 631                         megasas_configure_queue_sizes(instance);
 632                         goto retry_alloc;
 633                 } else {
 634                         dev_err(&instance->pdev->dev,
 635                                 "Failed from %s %d\n",  __func__, __LINE__);
 636                         return -ENOMEM;
 637                 }
 638         }
 639
 640         if (!megasas_check_same_4gb_region(instance,
 641                                            fusion->io_request_frames_phys,
 642                                            fusion->io_frames_alloc_sz)) {
 643                 dma_pool_free(fusion->io_request_frames_pool,
 644                               fusion->io_request_frames,
 645                               fusion->io_request_frames_phys);
 646                 fusion->io_request_frames = NULL;
 647                 dma_pool_destroy(fusion->io_request_frames_pool);
 648
 649                 fusion->io_request_frames_pool =
 650                         dma_pool_create("mr_ioreq_align",
 651                                         &instance->pdev->dev,
 652                                         fusion->io_frames_alloc_sz,
 653                                         roundup_pow_of_two(fusion->io_frames_alloc_sz),
 654                                         0);
 655
 656                 if (!fusion->io_request_frames_pool) {
 657                         dev_err(&instance->pdev->dev,
 658                                 "Failed from %s %d\n",  __func__, __LINE__);
 659                         return -ENOMEM;
 660                 }
 661
 662                 fusion->io_request_frames =
 663                         dma_pool_alloc(fusion->io_request_frames_pool,
 664                                        GFP_KERNEL,
 665                                        &fusion->io_request_frames_phys);
 666
 667                 if (!fusion->io_request_frames) {
 668                         dev_err(&instance->pdev->dev,
 669                                 "Failed from %s %d\n",  __func__, __LINE__);
 670                         return -ENOMEM;
 671                 }
 672         }
 673
 674         fusion->req_frames_desc =
 675                 dma_alloc_coherent(&instance->pdev->dev,
 676                                    fusion->request_alloc_sz,
 677                                    &fusion->req_frames_desc_phys, GFP_KERNEL);
 678         if (!fusion->req_frames_desc) {
 679                 dev_err(&instance->pdev->dev,
 680                         "Failed from %s %d\n",  __func__, __LINE__);
 681                 return -ENOMEM;
 682         }
 683
 684         return 0;
 685 }
 686
 687 static int
 688 megasas_alloc_reply_fusion(struct megasas_instance *instance)
 689 {
 690         int i, count;
 691         struct fusion_context *fusion;
 692         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 693         fusion = instance->ctrl_context;
 694
 695         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 696         fusion->reply_frames_desc_pool =
 697                         dma_pool_create("mr_reply", &instance->pdev->dev,
 698                                 fusion->reply_alloc_sz * count, 16, 0);
 699
 700         if (!fusion->reply_frames_desc_pool) {
 701                 dev_err(&instance->pdev->dev,
 702                         "Failed from %s %d\n",  __func__, __LINE__);
 703                 return -ENOMEM;
 704         }
 705
 706         fusion->reply_frames_desc[0] =
 707                 dma_pool_alloc(fusion->reply_frames_desc_pool,
 708                         GFP_KERNEL, &fusion->reply_frames_desc_phys[0]);
 709         if (!fusion->reply_frames_desc[0]) {
 710                 dev_err(&instance->pdev->dev,
 711                         "Failed from %s %d\n",  __func__, __LINE__);
 712                 return -ENOMEM;
 713         }
 714
 715         if (!megasas_check_same_4gb_region(instance,
 716                                            fusion->reply_frames_desc_phys[0],
 717                                            (fusion->reply_alloc_sz * count))) {
 718                 dma_pool_free(fusion->reply_frames_desc_pool,
 719                               fusion->reply_frames_desc[0],
 720                               fusion->reply_frames_desc_phys[0]);
 721                 fusion->reply_frames_desc[0] = NULL;
 722                 dma_pool_destroy(fusion->reply_frames_desc_pool);
 723
 724                 fusion->reply_frames_desc_pool =
 725                         dma_pool_create("mr_reply_align",
 726                                         &instance->pdev->dev,
 727                                         fusion->reply_alloc_sz * count,
 728                                         roundup_pow_of_two(fusion->reply_alloc_sz * count),
 729                                         0);
 730
 731                 if (!fusion->reply_frames_desc_pool) {
 732                         dev_err(&instance->pdev->dev,
 733                                 "Failed from %s %d\n",  __func__, __LINE__);
 734                         return -ENOMEM;
 735                 }
 736
 737                 fusion->reply_frames_desc[0] =
 738                         dma_pool_alloc(fusion->reply_frames_desc_pool,
 739                                        GFP_KERNEL,
 740                                        &fusion->reply_frames_desc_phys[0]);
 741
 742                 if (!fusion->reply_frames_desc[0]) {
 743                         dev_err(&instance->pdev->dev,
 744                                 "Failed from %s %d\n",  __func__, __LINE__);
 745                         return -ENOMEM;
 746                 }
 747         }
 748
 749         reply_desc = fusion->reply_frames_desc[0];
 750         for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
 751                 reply_desc->Words = cpu_to_le64(ULLONG_MAX);
 752
 753         /* This is not a rdpq mode, but driver still populate
 754          * reply_frame_desc array to use same msix index in ISR path.
 755          */
 756         for (i = 0; i < (count - 1); i++)
 757                 fusion->reply_frames_desc[i + 1] =
 758                         fusion->reply_frames_desc[i] +
 759                         (fusion->reply_alloc_sz)/sizeof(union MPI2_REPLY_DESCRIPTORS_UNION);
 760
 761         return 0;
 762 }
 763
 764 static int
 765 megasas_alloc_rdpq_fusion(struct megasas_instance *instance)
 766 {
 767         int i, j, k, msix_count;
 768         struct fusion_context *fusion;
 769         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 770         union MPI2_REPLY_DESCRIPTORS_UNION *rdpq_chunk_virt[RDPQ_MAX_CHUNK_COUNT];
 771         dma_addr_t rdpq_chunk_phys[RDPQ_MAX_CHUNK_COUNT];
 772         u8 dma_alloc_count, abs_index;
 773         u32 chunk_size, array_size, offset;
 774
 775         fusion = instance->ctrl_context;
 776         chunk_size = fusion->reply_alloc_sz * RDPQ_MAX_INDEX_IN_ONE_CHUNK;
 777         array_size = sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) *
 778                      MAX_MSIX_QUEUES_FUSION;
 779
 780         fusion->rdpq_virt = dma_alloc_coherent(&instance->pdev->dev,
 781                                                array_size, &fusion->rdpq_phys,
 782                                                GFP_KERNEL);
 783         if (!fusion->rdpq_virt) {
 784                 dev_err(&instance->pdev->dev,
 785                         "Failed from %s %d\n",  __func__, __LINE__);
 786                 return -ENOMEM;
 787         }
 788
 789         msix_count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 790
 791         fusion->reply_frames_desc_pool = dma_pool_create("mr_rdpq",
 792                                                          &instance->pdev->dev,
 793                                                          chunk_size, 16, 0);
 794         fusion->reply_frames_desc_pool_align =
 795                                 dma_pool_create("mr_rdpq_align",
 796                                                 &instance->pdev->dev,
 797                                                 chunk_size,
 798                                                 roundup_pow_of_two(chunk_size),
 799                                                 0);
 800
 801         if (!fusion->reply_frames_desc_pool ||
 802             !fusion->reply_frames_desc_pool_align) {
 803                 dev_err(&instance->pdev->dev,
 804                         "Failed from %s %d\n",  __func__, __LINE__);
 805                 return -ENOMEM;
 806         }
 807
 808 /*
 809  * For INVADER_SERIES each set of 8 reply queues(0-7, 8-15, ..) and
 810  * VENTURA_SERIES each set of 16 reply queues(0-15, 16-31, ..) should be
 811  * within 4GB boundary and also reply queues in a set must have same
 812  * upper 32-bits in their memory address. so here driver is allocating the
 813  * DMA'able memory for reply queues according. Driver uses limitation of
 814  * VENTURA_SERIES to manage INVADER_SERIES as well.
 815  */
 816         dma_alloc_count = DIV_ROUND_UP(msix_count, RDPQ_MAX_INDEX_IN_ONE_CHUNK);
 817
 818         for (i = 0; i < dma_alloc_count; i++) {
 819                 rdpq_chunk_virt[i] =
 820                         dma_pool_alloc(fusion->reply_frames_desc_pool,
 821                                        GFP_KERNEL, &rdpq_chunk_phys[i]);
 822                 if (!rdpq_chunk_virt[i]) {
 823                         dev_err(&instance->pdev->dev,
 824                                 "Failed from %s %d\n",  __func__, __LINE__);
 825                         return -ENOMEM;
 826                 }
 827                 /* reply desc pool requires to be in same 4 gb region.
 828                  * Below function will check this.
 829                  * In case of failure, new pci pool will be created with updated
 830                  * alignment.
 831                  * For RDPQ buffers, driver always allocate two separate pci pool.
 832                  * Alignment will be used such a way that next allocation if
 833                  * success, will always meet same 4gb region requirement.
 834                  * rdpq_tracker keep track of each buffer's physical,
 835                  * virtual address and pci pool descriptor. It will help driver
 836                  * while freeing the resources.
 837                  *
 838                  */
 839                 if (!megasas_check_same_4gb_region(instance, rdpq_chunk_phys[i],
 840                                                    chunk_size)) {
 841                         dma_pool_free(fusion->reply_frames_desc_pool,
 842                                       rdpq_chunk_virt[i],
 843                                       rdpq_chunk_phys[i]);
 844
 845                         rdpq_chunk_virt[i] =
 846                                 dma_pool_alloc(fusion->reply_frames_desc_pool_align,
 847                                                GFP_KERNEL, &rdpq_chunk_phys[i]);
 848                         if (!rdpq_chunk_virt[i]) {
 849                                 dev_err(&instance->pdev->dev,
 850                                         "Failed from %s %d\n",
 851                                         __func__, __LINE__);
 852                                 return -ENOMEM;
 853                         }
 854                         fusion->rdpq_tracker[i].dma_pool_ptr =
 855                                         fusion->reply_frames_desc_pool_align;
 856                 } else {
 857                         fusion->rdpq_tracker[i].dma_pool_ptr =
 858                                         fusion->reply_frames_desc_pool;
 859                 }
 860
 861                 fusion->rdpq_tracker[i].pool_entry_phys = rdpq_chunk_phys[i];
 862                 fusion->rdpq_tracker[i].pool_entry_virt = rdpq_chunk_virt[i];
 863         }
 864
 865         for (k = 0; k < dma_alloc_count; k++) {
 866                 for (i = 0; i < RDPQ_MAX_INDEX_IN_ONE_CHUNK; i++) {
 867                         abs_index = (k * RDPQ_MAX_INDEX_IN_ONE_CHUNK) + i;
 868
 869                         if (abs_index == msix_count)
 870                                 break;
 871                         offset = fusion->reply_alloc_sz * i;
 872                         fusion->rdpq_virt[abs_index].RDPQBaseAddress =
 873                                         cpu_to_le64(rdpq_chunk_phys[k] + offset);
 874                         fusion->reply_frames_desc_phys[abs_index] =
 875                                         rdpq_chunk_phys[k] + offset;
 876                         fusion->reply_frames_desc[abs_index] =
 877                                         (union MPI2_REPLY_DESCRIPTORS_UNION *)((u8 *)rdpq_chunk_virt[k] + offset);
 878
 879                         reply_desc = fusion->reply_frames_desc[abs_index];
 880                         for (j = 0; j < fusion->reply_q_depth; j++, reply_desc++)
 881                                 reply_desc->Words = ULLONG_MAX;
 882                 }
 883         }
 884
 885         return 0;
 886 }
 887
 888 static void
 889 megasas_free_rdpq_fusion(struct megasas_instance *instance) {
 890
 891         int i;
 892         struct fusion_context *fusion;
 893
 894         fusion = instance->ctrl_context;
 895
 896         for (i = 0; i < RDPQ_MAX_CHUNK_COUNT; i++) {
 897                 if (fusion->rdpq_tracker[i].pool_entry_virt)
 898                         dma_pool_free(fusion->rdpq_tracker[i].dma_pool_ptr,
 899                                       fusion->rdpq_tracker[i].pool_entry_virt,
 900                                       fusion->rdpq_tracker[i].pool_entry_phys);
 901
 902         }
 903
 904         dma_pool_destroy(fusion->reply_frames_desc_pool);
 905         dma_pool_destroy(fusion->reply_frames_desc_pool_align);
 906
 907         if (fusion->rdpq_virt)
 908                 dma_free_coherent(&instance->pdev->dev,
 909                         sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) * MAX_MSIX_QUEUES_FUSION,
 910                         fusion->rdpq_virt, fusion->rdpq_phys);
 911 }
 912
 913 static void
 914 megasas_free_reply_fusion(struct megasas_instance *instance) {
 915
 916         struct fusion_context *fusion;
 917
 918         fusion = instance->ctrl_context;
 919
 920         if (fusion->reply_frames_desc[0])
 921                 dma_pool_free(fusion->reply_frames_desc_pool,
 922                         fusion->reply_frames_desc[0],
 923                         fusion->reply_frames_desc_phys[0]);
 924
 925         dma_pool_destroy(fusion->reply_frames_desc_pool);
 926
 927 }
 928
 929
 930 /**
 931  * megasas_alloc_cmds_fusion -  Allocates the command packets
 932  * @instance:           Adapter soft state
 933  *
 934  *
 935  * Each frame has a 32-bit field called context. This context is used to get
 936  * back the megasas_cmd_fusion from the frame when a frame gets completed
 937  * In this driver, the 32 bit values are the indices into an array cmd_list.
 938  * This array is used only to look up the megasas_cmd_fusion given the context.
 939  * The free commands themselves are maintained in a linked list called cmd_pool.
 940  *
 941  * cmds are formed in the io_request and sg_frame members of the
 942  * megasas_cmd_fusion. The context field is used to get a request descriptor
 943  * and is used as SMID of the cmd.
 944  * SMID value range is from 1 to max_fw_cmds.
 945  */
 946 static int
 947 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 948 {
 949         int i;
 950         struct fusion_context *fusion;
 951         struct megasas_cmd_fusion *cmd;
 952         u32 offset;
 953         dma_addr_t io_req_base_phys;
 954         u8 *io_req_base;
 955
 956
 957         fusion = instance->ctrl_context;
 958
 959         if (megasas_alloc_request_fusion(instance))
 960                 goto fail_exit;
 961
 962         if (instance->is_rdpq) {
 963                 if (megasas_alloc_rdpq_fusion(instance))
 964                         goto fail_exit;
 965         } else
 966                 if (megasas_alloc_reply_fusion(instance))
 967                         goto fail_exit;
 968
 969         if (megasas_alloc_cmdlist_fusion(instance))
 970                 goto fail_exit;
 971
 972         dev_info(&instance->pdev->dev, "Configured max firmware commands: %d\n",
 973                  instance->max_fw_cmds);
 974
 975         /* The first 256 bytes (SMID 0) is not used. Don't add to the cmd list */
 976         io_req_base = fusion->io_request_frames + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 977         io_req_base_phys = fusion->io_request_frames_phys + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 978
 979         /*
 980          * Add all the commands to command pool (fusion->cmd_pool)
 981          */
 982
 983         /* SMID 0 is reserved. Set SMID/index from 1 */
 984         for (i = 0; i < instance->max_mpt_cmds; i++) {
 985                 cmd = fusion->cmd_list[i];
 986                 offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
 987                 memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 988                 cmd->index = i + 1;
 989                 cmd->scmd = NULL;
 990                 cmd->sync_cmd_idx =
 991                 (i >= instance->max_scsi_cmds && i < instance->max_fw_cmds) ?
 992                                 (i - instance->max_scsi_cmds) :
 993                                 (u32)ULONG_MAX; /* Set to Invalid */
 994                 cmd->instance = instance;
 995                 cmd->io_request =
 996                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
 997                   (io_req_base + offset);
 998                 memset(cmd->io_request, 0,
 999                        sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
1000                 cmd->io_request_phys_addr = io_req_base_phys + offset;
1001                 cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
1002         }
1003
1004         if (megasas_create_sg_sense_fusion(instance))
1005                 goto fail_exit;
1006
1007         return 0;
1008
1009 fail_exit:
1010         megasas_free_cmds_fusion(instance);
1011         return -ENOMEM;
1012 }
1013
1014 /**
1015  * wait_and_poll -      Issues a polling command
1016  * @instance:                   Adapter soft state
1017  * @cmd:                        Command packet to be issued
1018  *
1019  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
1020  */
1021 int
1022 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
1023         int seconds)
1024 {
1025         int i;
1026         struct megasas_header *frame_hdr = &cmd->frame->hdr;
1027         u32 status_reg;
1028
1029         u32 msecs = seconds * 1000;
1030
1031         /*
1032          * Wait for cmd_status to change
1033          */
1034         for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
1035                 rmb();
1036                 msleep(20);
1037                 if (!(i % 5000)) {
1038                         status_reg = instance->instancet->read_fw_status_reg(instance)
1039                                         & MFI_STATE_MASK;
1040                         if (status_reg == MFI_STATE_FAULT)
1041                                 break;
1042                 }
1043         }
1044
1045         if (frame_hdr->cmd_status == MFI_STAT_INVALID_STATUS)
1046                 return DCMD_TIMEOUT;
1047         else if (frame_hdr->cmd_status == MFI_STAT_OK)
1048                 return DCMD_SUCCESS;
1049         else
1050                 return DCMD_FAILED;
1051 }
1052
1053 /**
1054  * megasas_ioc_init_fusion -    Initializes the FW
1055  * @instance:           Adapter soft state
1056  *
1057  * Issues the IOC Init cmd
1058  */
1059 int
1060 megasas_ioc_init_fusion(struct megasas_instance *instance)
1061 {
1062         struct megasas_init_frame *init_frame;
1063         struct MPI2_IOC_INIT_REQUEST *IOCInitMessage = NULL;
1064         dma_addr_t      ioc_init_handle;
1065         struct megasas_cmd *cmd;
1066         u8 ret, cur_rdpq_mode;
1067         struct fusion_context *fusion;
1068         union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
1069         int i;
1070         struct megasas_header *frame_hdr;
1071         const char *sys_info;
1072         MFI_CAPABILITIES *drv_ops;
1073         u32 scratch_pad_1;
1074         ktime_t time;
1075         bool cur_fw_64bit_dma_capable;
1076         bool cur_intr_coalescing;
1077
1078         fusion = instance->ctrl_context;
1079
1080         ioc_init_handle = fusion->ioc_init_request_phys;
1081         IOCInitMessage = fusion->ioc_init_request;
1082
1083         cmd = fusion->ioc_init_cmd;
1084
1085         scratch_pad_1 = megasas_readl
1086                 (instance, &instance->reg_set->outbound_scratch_pad_1);
1087
1088         cur_rdpq_mode = (scratch_pad_1 & MR_RDPQ_MODE_OFFSET) ? 1 : 0;
1089
1090         if (instance->adapter_type == INVADER_SERIES) {
1091                 cur_fw_64bit_dma_capable =
1092                         (scratch_pad_1 & MR_CAN_HANDLE_64_BIT_DMA_OFFSET) ? true : false;
1093
1094                 if (instance->consistent_mask_64bit && !cur_fw_64bit_dma_capable) {
1095                         dev_err(&instance->pdev->dev, "Driver was operating on 64bit "
1096                                 "DMA mask, but upcoming FW does not support 64bit DMA mask\n");
1097                         megaraid_sas_kill_hba(instance);
1098                         ret = 1;
1099                         goto fail_fw_init;
1100                 }
1101         }
1102
1103         if (instance->is_rdpq && !cur_rdpq_mode) {
1104                 dev_err(&instance->pdev->dev, "Firmware downgrade *NOT SUPPORTED*"
1105                         " from RDPQ mode to non RDPQ mode\n");
1106                 ret = 1;
1107                 goto fail_fw_init;
1108         }
1109
1110         cur_intr_coalescing = (scratch_pad_1 & MR_INTR_COALESCING_SUPPORT_OFFSET) ?
1111                                                         true : false;
1112
1113         if ((instance->low_latency_index_start ==
1114                 MR_HIGH_IOPS_QUEUE_COUNT) && cur_intr_coalescing)
1115                 instance->perf_mode = MR_BALANCED_PERF_MODE;
1116
1117         dev_info(&instance->pdev->dev, "Performance mode :%s\n",
1118                 MEGASAS_PERF_MODE_2STR(instance->perf_mode));
1119
1120         instance->fw_sync_cache_support = (scratch_pad_1 &
1121                 MR_CAN_HANDLE_SYNC_CACHE_OFFSET) ? 1 : 0;
1122         dev_info(&instance->pdev->dev, "FW supports sync cache\t: %s\n",
1123                  instance->fw_sync_cache_support ? "Yes" : "No");
1124
1125         memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
1126
1127         IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
1128         IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
1129         IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION);
1130         IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
1131         IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4);
1132
1133         IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth);
1134         IOCInitMessage->ReplyDescriptorPostQueueAddress = instance->is_rdpq ?
1135                         cpu_to_le64(fusion->rdpq_phys) :
1136                         cpu_to_le64(fusion->reply_frames_desc_phys[0]);
1137         IOCInitMessage->MsgFlags = instance->is_rdpq ?
1138                         MPI2_IOCINIT_MSGFLAG_RDPQ_ARRAY_MODE : 0;
1139         IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys);
1140         IOCInitMessage->SenseBufferAddressHigh = cpu_to_le32(upper_32_bits(fusion->sense_phys_addr));
1141         IOCInitMessage->HostMSIxVectors = instance->msix_vectors;
1142         IOCInitMessage->HostPageSize = MR_DEFAULT_NVME_PAGE_SHIFT;
1143
1144         time = ktime_get_real();
1145         /* Convert to milliseconds as per FW requirement */
1146         IOCInitMessage->TimeStamp = cpu_to_le64(ktime_to_ms(time));
1147
1148         init_frame = (struct megasas_init_frame *)cmd->frame;
1149         memset(init_frame, 0, IOC_INIT_FRAME_SIZE);
1150
1151         frame_hdr = &cmd->frame->hdr;
1152         frame_hdr->cmd_status = 0xFF;
1153         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
1154
1155         init_frame->cmd = MFI_CMD_INIT;
1156         init_frame->cmd_status = 0xFF;
1157
1158         drv_ops = (MFI_CAPABILITIES *) &(init_frame->driver_operations);
1159
1160         /* driver support Extended MSIX */
1161         if (instance->adapter_type >= INVADER_SERIES)
1162                 drv_ops->mfi_capabilities.support_additional_msix = 1;
1163         /* driver supports HA / Remote LUN over Fast Path interface */
1164         drv_ops->mfi_capabilities.support_fp_remote_lun = 1;
1165
1166         drv_ops->mfi_capabilities.support_max_255lds = 1;
1167         drv_ops->mfi_capabilities.support_ndrive_r1_lb = 1;
1168         drv_ops->mfi_capabilities.security_protocol_cmds_fw = 1;
1169
1170         if (instance->max_chain_frame_sz > MEGASAS_CHAIN_FRAME_SZ_MIN)
1171                 drv_ops->mfi_capabilities.support_ext_io_size = 1;
1172
1173         drv_ops->mfi_capabilities.support_fp_rlbypass = 1;
1174         if (!dual_qdepth_disable)
1175                 drv_ops->mfi_capabilities.support_ext_queue_depth = 1;
1176
1177         drv_ops->mfi_capabilities.support_qd_throttling = 1;
1178         drv_ops->mfi_capabilities.support_pd_map_target_id = 1;
1179         drv_ops->mfi_capabilities.support_nvme_passthru = 1;
1180         drv_ops->mfi_capabilities.support_fw_exposed_dev_list = 1;
1181
1182         if (instance->consistent_mask_64bit)
1183                 drv_ops->mfi_capabilities.support_64bit_mode = 1;
1184
1185         /* Convert capability to LE32 */
1186         cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
1187
1188         sys_info = dmi_get_system_info(DMI_PRODUCT_UUID);
1189         if (instance->system_info_buf && sys_info) {
1190                 memcpy(instance->system_info_buf->systemId, sys_info,
1191                         strlen(sys_info) > 64 ? 64 : strlen(sys_info));
1192                 instance->system_info_buf->systemIdLength =
1193                         strlen(sys_info) > 64 ? 64 : strlen(sys_info);
1194                 init_frame->system_info_lo = cpu_to_le32(lower_32_bits(instance->system_info_h));
1195                 init_frame->system_info_hi = cpu_to_le32(upper_32_bits(instance->system_info_h));
1196         }
1197
1198         init_frame->queue_info_new_phys_addr_hi =
1199                 cpu_to_le32(upper_32_bits(ioc_init_handle));
1200         init_frame->queue_info_new_phys_addr_lo =
1201                 cpu_to_le32(lower_32_bits(ioc_init_handle));
1202         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
1203
1204         /*
1205          * Each bit in replyqueue_mask represents one group of MSI-x vectors
1206          * (each group has 8 vectors)
1207          */
1208         switch (instance->perf_mode) {
1209         case MR_BALANCED_PERF_MODE:
1210                 init_frame->replyqueue_mask =
1211                        cpu_to_le16(~(~0 << instance->low_latency_index_start/8));
1212                 break;
1213         case MR_IOPS_PERF_MODE:
1214                 init_frame->replyqueue_mask =
1215                        cpu_to_le16(~(~0 << instance->msix_vectors/8));
1216                 break;
1217         }
1218
1219
1220         req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr));
1221         req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr));
1222         req_desc.MFAIo.RequestFlags =
1223                 (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
1224                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1225
1226         /*
1227          * disable the intr before firing the init frame
1228          */
1229         instance->instancet->disable_intr(instance);
1230
1231         for (i = 0; i < (10 * 1000); i += 20) {
1232                 if (megasas_readl(instance, &instance->reg_set->doorbell) & 1)
1233                         msleep(20);
1234                 else
1235                         break;
1236         }
1237
1238         /* For AERO also, IOC_INIT requires 64 bit descriptor write */
1239         megasas_write_64bit_req_desc(instance, &req_desc);
1240
1241         wait_and_poll(instance, cmd, MFI_IO_TIMEOUT_SECS);
1242
1243         frame_hdr = &cmd->frame->hdr;
1244         if (frame_hdr->cmd_status != 0) {
1245                 ret = 1;
1246                 goto fail_fw_init;
1247         }
1248
1249         if (instance->adapter_type >= AERO_SERIES) {
1250                 scratch_pad_1 = megasas_readl
1251                         (instance, &instance->reg_set->outbound_scratch_pad_1);
1252
1253                 instance->atomic_desc_support =
1254                         (scratch_pad_1 & MR_ATOMIC_DESCRIPTOR_SUPPORT_OFFSET) ? 1 : 0;
1255
1256                 dev_info(&instance->pdev->dev, "FW supports atomic descriptor\t: %s\n",
1257                         instance->atomic_desc_support ? "Yes" : "No");
1258         }
1259
1260         return 0;
1261
1262 fail_fw_init:
1263         dev_err(&instance->pdev->dev,
1264                 "Init cmd return status FAILED for SCSI host %d\n",
1265                 instance->host->host_no);
1266
1267         return ret;
1268 }
1269
1270 /**
1271  * megasas_sync_pd_seq_num -    JBOD SEQ MAP
1272  * @instance:           Adapter soft state
1273  * @pend:               set to 1, if it is pended jbod map.
1274  *
1275  * Issue Jbod map to the firmware. If it is pended command,
1276  * issue command and return. If it is first instance of jbod map
1277  * issue and receive command.
1278  */
1279 int
1280 megasas_sync_pd_seq_num(struct megasas_instance *instance, bool pend) {
1281         int ret = 0;
1282         size_t pd_seq_map_sz;
1283         struct megasas_cmd *cmd;
1284         struct megasas_dcmd_frame *dcmd;
1285         struct fusion_context *fusion = instance->ctrl_context;
1286         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
1287         dma_addr_t pd_seq_h;
1288
1289         pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id & 1)];
1290         pd_seq_h = fusion->pd_seq_phys[(instance->pd_seq_map_id & 1)];
1291         pd_seq_map_sz = struct_size(pd_sync, seq, MAX_PHYSICAL_DEVICES - 1);
1292
1293         cmd = megasas_get_cmd(instance);
1294         if (!cmd) {
1295                 dev_err(&instance->pdev->dev,
1296                         "Could not get mfi cmd. Fail from %s %d\n",
1297                         __func__, __LINE__);
1298                 return -ENOMEM;
1299         }
1300
1301         dcmd = &cmd->frame->dcmd;
1302
1303         memset(pd_sync, 0, pd_seq_map_sz);
1304         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1305
1306         if (pend) {
1307                 dcmd->mbox.b[0] = MEGASAS_DCMD_MBOX_PEND_FLAG;
1308                 dcmd->flags = MFI_FRAME_DIR_WRITE;
1309                 instance->jbod_seq_cmd = cmd;
1310         } else {
1311                 dcmd->flags = MFI_FRAME_DIR_READ;
1312         }
1313
1314         dcmd->cmd = MFI_CMD_DCMD;
1315         dcmd->cmd_status = 0xFF;
1316         dcmd->sge_count = 1;
1317         dcmd->timeout = 0;
1318         dcmd->pad_0 = 0;
1319         dcmd->data_xfer_len = cpu_to_le32(pd_seq_map_sz);
1320         dcmd->opcode = cpu_to_le32(MR_DCMD_SYSTEM_PD_MAP_GET_INFO);
1321
1322         megasas_set_dma_settings(instance, dcmd, pd_seq_h, pd_seq_map_sz);
1323
1324         if (pend) {
1325                 instance->instancet->issue_dcmd(instance, cmd);
1326                 return 0;
1327         }
1328
1329         /* Below code is only for non pended DCMD */
1330         if (!instance->mask_interrupts)
1331                 ret = megasas_issue_blocked_cmd(instance, cmd,
1332                         MFI_IO_TIMEOUT_SECS);
1333         else
1334                 ret = megasas_issue_polled(instance, cmd);
1335
1336         if (le32_to_cpu(pd_sync->count) > MAX_PHYSICAL_DEVICES) {
1337                 dev_warn(&instance->pdev->dev,
1338                         "driver supports max %d JBOD, but FW reports %d\n",
1339                         MAX_PHYSICAL_DEVICES, le32_to_cpu(pd_sync->count));
1340                 ret = -EINVAL;
1341         }
1342
1343         if (ret == DCMD_TIMEOUT)
1344                 dev_warn(&instance->pdev->dev,
1345                          "%s DCMD timed out, continue without JBOD sequence map\n",
1346                          __func__);
1347
1348         if (ret == DCMD_SUCCESS)
1349                 instance->pd_seq_map_id++;
1350
1351         megasas_return_cmd(instance, cmd);
1352         return ret;
1353 }
1354
1355 /*
1356  * megasas_get_ld_map_info -    Returns FW's ld_map structure
1357  * @instance:                           Adapter soft state
1358  * @pend:                               Pend the command or not
1359  * Issues an internal command (DCMD) to get the FW's controller PD
1360  * list structure.  This information is mainly used to find out SYSTEM
1361  * supported by the FW.
1362  * dcmd.mbox value setting for MR_DCMD_LD_MAP_GET_INFO
1363  * dcmd.mbox.b[0]       - number of LDs being sync'd
1364  * dcmd.mbox.b[1]       - 0 - complete command immediately.
1365  *                      - 1 - pend till config change
1366  * dcmd.mbox.b[2]       - 0 - supports max 64 lds and uses legacy MR_FW_RAID_MAP
1367  *                      - 1 - supports max MAX_LOGICAL_DRIVES_EXT lds and
1368  *                              uses extended struct MR_FW_RAID_MAP_EXT
1369  */
1370 static int
1371 megasas_get_ld_map_info(struct megasas_instance *instance)
1372 {
1373         int ret = 0;
1374         struct megasas_cmd *cmd;
1375         struct megasas_dcmd_frame *dcmd;
1376         void *ci;
1377         dma_addr_t ci_h = 0;
1378         u32 size_map_info;
1379         struct fusion_context *fusion;
1380
1381         cmd = megasas_get_cmd(instance);
1382
1383         if (!cmd) {
1384                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for map info\n");
1385                 return -ENOMEM;
1386         }
1387
1388         fusion = instance->ctrl_context;
1389
1390         if (!fusion) {
1391                 megasas_return_cmd(instance, cmd);
1392                 return -ENXIO;
1393         }
1394
1395         dcmd = &cmd->frame->dcmd;
1396
1397         size_map_info = fusion->current_map_sz;
1398
1399         ci = (void *) fusion->ld_map[(instance->map_id & 1)];
1400         ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
1401
1402         if (!ci) {
1403                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to alloc mem for ld_map_info\n");
1404                 megasas_return_cmd(instance, cmd);
1405                 return -ENOMEM;
1406         }
1407
1408         memset(ci, 0, fusion->max_map_sz);
1409         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1410         dcmd->cmd = MFI_CMD_DCMD;
1411         dcmd->cmd_status = 0xFF;
1412         dcmd->sge_count = 1;
1413         dcmd->flags = MFI_FRAME_DIR_READ;
1414         dcmd->timeout = 0;
1415         dcmd->pad_0 = 0;
1416         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
1417         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
1418
1419         megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
1420
1421         if (!instance->mask_interrupts)
1422                 ret = megasas_issue_blocked_cmd(instance, cmd,
1423                         MFI_IO_TIMEOUT_SECS);
1424         else
1425                 ret = megasas_issue_polled(instance, cmd);
1426
1427         if (ret == DCMD_TIMEOUT)
1428                 dev_warn(&instance->pdev->dev,
1429                          "%s DCMD timed out, RAID map is disabled\n",
1430                          __func__);
1431
1432         megasas_return_cmd(instance, cmd);
1433
1434         return ret;
1435 }
1436
1437 u8
1438 megasas_get_map_info(struct megasas_instance *instance)
1439 {
1440         struct fusion_context *fusion = instance->ctrl_context;
1441
1442         fusion->fast_path_io = 0;
1443         if (!megasas_get_ld_map_info(instance)) {
1444                 if (MR_ValidateMapInfo(instance, instance->map_id)) {
1445                         fusion->fast_path_io = 1;
1446                         return 0;
1447                 }
1448         }
1449         return 1;
1450 }
1451
1452 /*
1453  * megasas_sync_map_info -      Returns FW's ld_map structure
1454  * @instance:                           Adapter soft state
1455  *
1456  * Issues an internal command (DCMD) to get the FW's controller PD
1457  * list structure.  This information is mainly used to find out SYSTEM
1458  * supported by the FW.
1459  */
1460 int
1461 megasas_sync_map_info(struct megasas_instance *instance)
1462 {
1463         int i;
1464         struct megasas_cmd *cmd;
1465         struct megasas_dcmd_frame *dcmd;
1466         u16 num_lds;
1467         struct fusion_context *fusion;
1468         struct MR_LD_TARGET_SYNC *ci = NULL;
1469         struct MR_DRV_RAID_MAP_ALL *map;
1470         struct MR_LD_RAID  *raid;
1471         struct MR_LD_TARGET_SYNC *ld_sync;
1472         dma_addr_t ci_h = 0;
1473         u32 size_map_info;
1474
1475         cmd = megasas_get_cmd(instance);
1476
1477         if (!cmd) {
1478                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for sync info\n");
1479                 return -ENOMEM;
1480         }
1481
1482         fusion = instance->ctrl_context;
1483
1484         if (!fusion) {
1485                 megasas_return_cmd(instance, cmd);
1486                 return 1;
1487         }
1488
1489         map = fusion->ld_drv_map[instance->map_id & 1];
1490
1491         num_lds = le16_to_cpu(map->raidMap.ldCount);
1492
1493         dcmd = &cmd->frame->dcmd;
1494
1495         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1496
1497         ci = (struct MR_LD_TARGET_SYNC *)
1498           fusion->ld_map[(instance->map_id - 1) & 1];
1499         memset(ci, 0, fusion->max_map_sz);
1500
1501         ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
1502
1503         ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
1504
1505         for (i = 0; i < num_lds; i++, ld_sync++) {
1506                 raid = MR_LdRaidGet(i, map);
1507                 ld_sync->targetId = MR_GetLDTgtId(i, map);
1508                 ld_sync->seqNum = raid->seqNum;
1509         }
1510
1511         size_map_info = fusion->current_map_sz;
1512
1513         dcmd->cmd = MFI_CMD_DCMD;
1514         dcmd->cmd_status = 0xFF;
1515         dcmd->sge_count = 1;
1516         dcmd->flags = MFI_FRAME_DIR_WRITE;
1517         dcmd->timeout = 0;
1518         dcmd->pad_0 = 0;
1519         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
1520         dcmd->mbox.b[0] = num_lds;
1521         dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
1522         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
1523
1524         megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
1525
1526         instance->map_update_cmd = cmd;
1527
1528         instance->instancet->issue_dcmd(instance, cmd);
1529
1530         return 0;
1531 }
1532
1533 /*
1534  * meagasas_display_intel_branding - Display branding string
1535  * @instance: per adapter object
1536  *
1537  * Return nothing.
1538  */
1539 static void
1540 megasas_display_intel_branding(struct megasas_instance *instance)
1541 {
1542         if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL)
1543                 return;
1544
1545         switch (instance->pdev->device) {
1546         case PCI_DEVICE_ID_LSI_INVADER:
1547                 switch (instance->pdev->subsystem_device) {
1548                 case MEGARAID_INTEL_RS3DC080_SSDID:
1549                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1550                                 instance->host->host_no,
1551                                 MEGARAID_INTEL_RS3DC080_BRANDING);
1552                         break;
1553                 case MEGARAID_INTEL_RS3DC040_SSDID:
1554                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1555                                 instance->host->host_no,
1556                                 MEGARAID_INTEL_RS3DC040_BRANDING);
1557                         break;
1558                 case MEGARAID_INTEL_RS3SC008_SSDID:
1559                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1560                                 instance->host->host_no,
1561                                 MEGARAID_INTEL_RS3SC008_BRANDING);
1562                         break;
1563                 case MEGARAID_INTEL_RS3MC044_SSDID:
1564                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1565                                 instance->host->host_no,
1566                                 MEGARAID_INTEL_RS3MC044_BRANDING);
1567                         break;
1568                 default:
1569                         break;
1570                 }
1571                 break;
1572         case PCI_DEVICE_ID_LSI_FURY:
1573                 switch (instance->pdev->subsystem_device) {
1574                 case MEGARAID_INTEL_RS3WC080_SSDID:
1575                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1576                                 instance->host->host_no,
1577                                 MEGARAID_INTEL_RS3WC080_BRANDING);
1578                         break;
1579                 case MEGARAID_INTEL_RS3WC040_SSDID:
1580                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1581                                 instance->host->host_no,
1582                                 MEGARAID_INTEL_RS3WC040_BRANDING);
1583                         break;
1584                 default:
1585                         break;
1586                 }
1587                 break;
1588         case PCI_DEVICE_ID_LSI_CUTLASS_52:
1589         case PCI_DEVICE_ID_LSI_CUTLASS_53:
1590                 switch (instance->pdev->subsystem_device) {
1591                 case MEGARAID_INTEL_RMS3BC160_SSDID:
1592                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1593                                 instance->host->host_no,
1594                                 MEGARAID_INTEL_RMS3BC160_BRANDING);
1595                         break;
1596                 default:
1597                         break;
1598                 }
1599                 break;
1600         default:
1601                 break;
1602         }
1603 }
1604
1605 /**
1606  * megasas_allocate_raid_maps - Allocate memory for RAID maps
1607  * @instance:                           Adapter soft state
1608  *
1609  * return:                              if success: return 0
1610  *                                      failed:  return -ENOMEM
1611  */
1612 static inline int megasas_allocate_raid_maps(struct megasas_instance *instance)
1613 {
1614         struct fusion_context *fusion;
1615         int i = 0;
1616
1617         fusion = instance->ctrl_context;
1618
1619         fusion->drv_map_pages = get_order(fusion->drv_map_sz);
1620
1621         for (i = 0; i < 2; i++) {
1622                 fusion->ld_map[i] = NULL;
1623
1624                 fusion->ld_drv_map[i] = (void *)
1625                         __get_free_pages(__GFP_ZERO | GFP_KERNEL,
1626                                          fusion->drv_map_pages);
1627
1628                 if (!fusion->ld_drv_map[i]) {
1629                         fusion->ld_drv_map[i] = vzalloc(fusion->drv_map_sz);
1630
1631                         if (!fusion->ld_drv_map[i]) {
1632                                 dev_err(&instance->pdev->dev,
1633                                         "Could not allocate memory for local map"
1634                                         " size requested: %d\n",
1635                                         fusion->drv_map_sz);
1636                                 goto ld_drv_map_alloc_fail;
1637                         }
1638                 }
1639         }
1640
1641         for (i = 0; i < 2; i++) {
1642                 fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
1643                                                        fusion->max_map_sz,
1644                                                        &fusion->ld_map_phys[i],
1645                                                        GFP_KERNEL);
1646                 if (!fusion->ld_map[i]) {
1647                         dev_err(&instance->pdev->dev,
1648                                 "Could not allocate memory for map info %s:%d\n",
1649                                 __func__, __LINE__);
1650                         goto ld_map_alloc_fail;
1651                 }
1652         }
1653
1654         return 0;
1655
1656 ld_map_alloc_fail:
1657         for (i = 0; i < 2; i++) {
1658                 if (fusion->ld_map[i])
1659                         dma_free_coherent(&instance->pdev->dev,
1660                                           fusion->max_map_sz,
1661                                           fusion->ld_map[i],
1662                                           fusion->ld_map_phys[i]);
1663         }
1664
1665 ld_drv_map_alloc_fail:
1666         for (i = 0; i < 2; i++) {
1667                 if (fusion->ld_drv_map[i]) {
1668                         if (is_vmalloc_addr(fusion->ld_drv_map[i]))
1669                                 vfree(fusion->ld_drv_map[i]);
1670                         else
1671                                 free_pages((ulong)fusion->ld_drv_map[i],
1672                                            fusion->drv_map_pages);
1673                 }
1674         }
1675
1676         return -ENOMEM;
1677 }
1678
1679 /**
1680  * megasas_configure_queue_sizes -      Calculate size of request desc queue,
1681  *                                      reply desc queue,
1682  *                                      IO request frame queue, set can_queue.
1683  * @instance:                           Adapter soft state
1684  * @return:                             void
1685  */
1686 static inline
1687 void megasas_configure_queue_sizes(struct megasas_instance *instance)
1688 {
1689         struct fusion_context *fusion;
1690         u16 max_cmd;
1691
1692         fusion = instance->ctrl_context;
1693         max_cmd = instance->max_fw_cmds;
1694
1695         if (instance->adapter_type >= VENTURA_SERIES)
1696                 instance->max_mpt_cmds = instance->max_fw_cmds * RAID_1_PEER_CMDS;
1697         else
1698                 instance->max_mpt_cmds = instance->max_fw_cmds;
1699
1700         instance->max_scsi_cmds = instance->max_fw_cmds - instance->max_mfi_cmds;
1701         instance->cur_can_queue = instance->max_scsi_cmds;
1702         instance->host->can_queue = instance->cur_can_queue;
1703
1704         fusion->reply_q_depth = 2 * ((max_cmd + 1 + 15) / 16) * 16;
1705
1706         fusion->request_alloc_sz = sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *
1707                                           instance->max_mpt_cmds;
1708         fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION) *
1709                                         (fusion->reply_q_depth);
1710         fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
1711                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
1712                  * (instance->max_mpt_cmds + 1)); /* Extra 1 for SMID 0 */
1713 }
1714
1715 static int megasas_alloc_ioc_init_frame(struct megasas_instance *instance)
1716 {
1717         struct fusion_context *fusion;
1718         struct megasas_cmd *cmd;
1719
1720         fusion = instance->ctrl_context;
1721
1722         cmd = kzalloc(sizeof(struct megasas_cmd), GFP_KERNEL);
1723
1724         if (!cmd) {
1725                 dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
1726                         __func__, __LINE__);
1727                 return -ENOMEM;
1728         }
1729
1730         cmd->frame = dma_alloc_coherent(&instance->pdev->dev,
1731                                         IOC_INIT_FRAME_SIZE,
1732                                         &cmd->frame_phys_addr, GFP_KERNEL);
1733
1734         if (!cmd->frame) {
1735                 dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
1736                         __func__, __LINE__);
1737                 kfree(cmd);
1738                 return -ENOMEM;
1739         }
1740
1741         fusion->ioc_init_cmd = cmd;
1742         return 0;
1743 }
1744
1745 /**
1746  * megasas_free_ioc_init_cmd -  Free IOC INIT command frame
1747  * @instance:           Adapter soft state
1748  */
1749 static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance)
1750 {
1751         struct fusion_context *fusion;
1752
1753         fusion = instance->ctrl_context;
1754
1755         if (fusion->ioc_init_cmd && fusion->ioc_init_cmd->frame)
1756                 dma_free_coherent(&instance->pdev->dev,
1757                                   IOC_INIT_FRAME_SIZE,
1758                                   fusion->ioc_init_cmd->frame,
1759                                   fusion->ioc_init_cmd->frame_phys_addr);
1760
1761         kfree(fusion->ioc_init_cmd);
1762 }
1763
1764 /**
1765  * megasas_init_adapter_fusion -        Initializes the FW
1766  * @instance:           Adapter soft state
1767  *
1768  * This is the main function for initializing firmware.
1769  */
1770 static u32
1771 megasas_init_adapter_fusion(struct megasas_instance *instance)
1772 {
1773         struct fusion_context *fusion;
1774         u32 scratch_pad_1;
1775         int i = 0, count;
1776         u32 status_reg;
1777
1778         fusion = instance->ctrl_context;
1779
1780         megasas_fusion_update_can_queue(instance, PROBE_CONTEXT);
1781
1782         /*
1783          * Only Driver's internal DCMDs and IOCTL DCMDs needs to have MFI frames
1784          */
1785         instance->max_mfi_cmds =
1786                 MEGASAS_FUSION_INTERNAL_CMDS + MEGASAS_FUSION_IOCTL_CMDS;
1787
1788         megasas_configure_queue_sizes(instance);
1789
1790         scratch_pad_1 = megasas_readl(instance,
1791                                       &instance->reg_set->outbound_scratch_pad_1);
1792         /* If scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK is set,
1793          * Firmware support extended IO chain frame which is 4 times more than
1794          * legacy Firmware.
1795          * Legacy Firmware - Frame size is (8 * 128) = 1K
1796          * 1M IO Firmware  - Frame size is (8 * 128 * 4)  = 4K
1797          */
1798         if (scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK)
1799                 instance->max_chain_frame_sz =
1800                         ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
1801                         MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_1MB_IO;
1802         else
1803                 instance->max_chain_frame_sz =
1804                         ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
1805                         MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_256K_IO;
1806
1807         if (instance->max_chain_frame_sz < MEGASAS_CHAIN_FRAME_SZ_MIN) {
1808                 dev_warn(&instance->pdev->dev, "frame size %d invalid, fall back to legacy max frame size %d\n",
1809                         instance->max_chain_frame_sz,
1810                         MEGASAS_CHAIN_FRAME_SZ_MIN);
1811                 instance->max_chain_frame_sz = MEGASAS_CHAIN_FRAME_SZ_MIN;
1812         }
1813
1814         fusion->max_sge_in_main_msg =
1815                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
1816                         - offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
1817
1818         fusion->max_sge_in_chain =
1819                 instance->max_chain_frame_sz
1820                         / sizeof(union MPI2_SGE_IO_UNION);
1821
1822         instance->max_num_sge =
1823                 rounddown_pow_of_two(fusion->max_sge_in_main_msg
1824                         + fusion->max_sge_in_chain - 2);
1825
1826         /* Used for pass thru MFI frame (DCMD) */
1827         fusion->chain_offset_mfi_pthru =
1828                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
1829
1830         fusion->chain_offset_io_request =
1831                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
1832                  sizeof(union MPI2_SGE_IO_UNION))/16;
1833
1834         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
1835         for (i = 0 ; i < count; i++)
1836                 fusion->last_reply_idx[i] = 0;
1837
1838         /*
1839          * For fusion adapters, 3 commands for IOCTL and 8 commands
1840          * for driver's internal DCMDs.
1841          */
1842         instance->max_scsi_cmds = instance->max_fw_cmds -
1843                                 (MEGASAS_FUSION_INTERNAL_CMDS +
1844                                 MEGASAS_FUSION_IOCTL_CMDS);
1845         sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS);
1846
1847         if (megasas_alloc_ioc_init_frame(instance))
1848                 return 1;
1849
1850         /*
1851          * Allocate memory for descriptors
1852          * Create a pool of commands
1853          */
1854         if (megasas_alloc_cmds(instance))
1855                 goto fail_alloc_mfi_cmds;
1856         if (megasas_alloc_cmds_fusion(instance))
1857                 goto fail_alloc_cmds;
1858
1859         if (megasas_ioc_init_fusion(instance)) {
1860                 status_reg = instance->instancet->read_fw_status_reg(instance);
1861                 if (((status_reg & MFI_STATE_MASK) == MFI_STATE_FAULT) &&
1862                     (status_reg & MFI_RESET_ADAPTER)) {
1863                         /* Do a chip reset and then retry IOC INIT once */
1864                         if (megasas_adp_reset_wait_for_ready
1865                                 (instance, true, 0) == FAILED)
1866                                 goto fail_ioc_init;
1867
1868                         if (megasas_ioc_init_fusion(instance))
1869                                 goto fail_ioc_init;
1870                 } else {
1871                         goto fail_ioc_init;
1872                 }
1873         }
1874
1875         megasas_display_intel_branding(instance);
1876         if (megasas_get_ctrl_info(instance)) {
1877                 dev_err(&instance->pdev->dev,
1878                         "Could not get controller info. Fail from %s %d\n",
1879                         __func__, __LINE__);
1880                 goto fail_ioc_init;
1881         }
1882
1883         instance->flag_ieee = 1;
1884         instance->r1_ldio_hint_default =  MR_R1_LDIO_PIGGYBACK_DEFAULT;
1885         instance->threshold_reply_count = instance->max_fw_cmds / 4;
1886         fusion->fast_path_io = 0;
1887
1888         if (megasas_allocate_raid_maps(instance))
1889                 goto fail_ioc_init;
1890
1891         if (!megasas_get_map_info(instance))
1892                 megasas_sync_map_info(instance);
1893
1894         return 0;
1895
1896 fail_ioc_init:
1897         megasas_free_cmds_fusion(instance);
1898 fail_alloc_cmds:
1899         megasas_free_cmds(instance);
1900 fail_alloc_mfi_cmds:
1901         megasas_free_ioc_init_cmd(instance);
1902         return 1;
1903 }
1904
1905 /**
1906  * megasas_fault_detect_work    -       Worker function of
1907  *                                      FW fault handling workqueue.
1908  */
1909 static void
1910 megasas_fault_detect_work(struct work_struct *work)
1911 {
1912         struct megasas_instance *instance =
1913                 container_of(work, struct megasas_instance,
1914                              fw_fault_work.work);
1915         u32 fw_state, dma_state, status;
1916
1917         /* Check the fw state */
1918         fw_state = instance->instancet->read_fw_status_reg(instance) &
1919                         MFI_STATE_MASK;
1920
1921         if (fw_state == MFI_STATE_FAULT) {
1922                 dma_state = instance->instancet->read_fw_status_reg(instance) &
1923                                 MFI_STATE_DMADONE;
1924                 /* Start collecting crash, if DMA bit is done */
1925                 if (instance->crash_dump_drv_support &&
1926                     instance->crash_dump_app_support && dma_state) {
1927                         megasas_fusion_crash_dump(instance);
1928                 } else {
1929                         if (instance->unload == 0) {
1930                                 status = megasas_reset_fusion(instance->host, 0);
1931                                 if (status != SUCCESS) {
1932                                         dev_err(&instance->pdev->dev,
1933                                                 "Failed from %s %d, do not re-arm timer\n",
1934                                                 __func__, __LINE__);
1935                                         return;
1936                                 }
1937                         }
1938                 }
1939         }
1940
1941         if (instance->fw_fault_work_q)
1942                 queue_delayed_work(instance->fw_fault_work_q,
1943                         &instance->fw_fault_work,
1944                         msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
1945 }
1946
1947 int
1948 megasas_fusion_start_watchdog(struct megasas_instance *instance)
1949 {
1950         /* Check if the Fault WQ is already started */
1951         if (instance->fw_fault_work_q)
1952                 return SUCCESS;
1953
1954         INIT_DELAYED_WORK(&instance->fw_fault_work, megasas_fault_detect_work);
1955
1956         snprintf(instance->fault_handler_work_q_name,
1957                  sizeof(instance->fault_handler_work_q_name),
1958                  "poll_megasas%d_status", instance->host->host_no);
1959
1960         instance->fw_fault_work_q =
1961                 create_singlethread_workqueue(instance->fault_handler_work_q_name);
1962         if (!instance->fw_fault_work_q) {
1963                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
1964                         __func__, __LINE__);
1965                 return FAILED;
1966         }
1967
1968         queue_delayed_work(instance->fw_fault_work_q,
1969                            &instance->fw_fault_work,
1970                            msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
1971
1972         return SUCCESS;
1973 }
1974
1975 void
1976 megasas_fusion_stop_watchdog(struct megasas_instance *instance)
1977 {
1978         struct workqueue_struct *wq;
1979
1980         if (instance->fw_fault_work_q) {
1981                 wq = instance->fw_fault_work_q;
1982                 instance->fw_fault_work_q = NULL;
1983                 if (!cancel_delayed_work_sync(&instance->fw_fault_work))
1984                         flush_workqueue(wq);
1985                 destroy_workqueue(wq);
1986         }
1987 }
1988
1989 /**
1990  * map_cmd_status -     Maps FW cmd status to OS cmd status
1991  * @cmd :               Pointer to cmd
1992  * @status :            status of cmd returned by FW
1993  * @ext_status :        ext status of cmd returned by FW
1994  */
1995
1996 static void
1997 map_cmd_status(struct fusion_context *fusion,
1998                 struct scsi_cmnd *scmd, u8 status, u8 ext_status,
1999                 u32 data_length, u8 *sense)
2000 {
2001         u8 cmd_type;
2002         int resid;
2003
2004         cmd_type = megasas_cmd_type(scmd);
2005         switch (status) {
2006
2007         case MFI_STAT_OK:
2008                 scmd->result = DID_OK << 16;
2009                 break;
2010
2011         case MFI_STAT_SCSI_IO_FAILED:
2012         case MFI_STAT_LD_INIT_IN_PROGRESS:
2013                 scmd->result = (DID_ERROR << 16) | ext_status;
2014                 break;
2015
2016         case MFI_STAT_SCSI_DONE_WITH_ERROR:
2017
2018                 scmd->result = (DID_OK << 16) | ext_status;
2019                 if (ext_status == SAM_STAT_CHECK_CONDITION) {
2020                         memset(scmd->sense_buffer, 0,
2021                                SCSI_SENSE_BUFFERSIZE);
2022                         memcpy(scmd->sense_buffer, sense,
2023                                SCSI_SENSE_BUFFERSIZE);
2024                         scmd->result |= DRIVER_SENSE << 24;
2025                 }
2026
2027                 /*
2028                  * If the  IO request is partially completed, then MR FW will
2029                  * update "io_request->DataLength" field with actual number of
2030                  * bytes transferred.Driver will set residual bytes count in
2031                  * SCSI command structure.
2032                  */
2033                 resid = (scsi_bufflen(scmd) - data_length);
2034                 scsi_set_resid(scmd, resid);
2035
2036                 if (resid &&
2037                         ((cmd_type == READ_WRITE_LDIO) ||
2038                         (cmd_type == READ_WRITE_SYSPDIO)))
2039                         scmd_printk(KERN_INFO, scmd, "BRCM Debug mfi stat 0x%x, data len"
2040                                 " requested/completed 0x%x/0x%x\n",
2041                                 status, scsi_bufflen(scmd), data_length);
2042                 break;
2043
2044         case MFI_STAT_LD_OFFLINE:
2045         case MFI_STAT_DEVICE_NOT_FOUND:
2046                 scmd->result = DID_BAD_TARGET << 16;
2047                 break;
2048         case MFI_STAT_CONFIG_SEQ_MISMATCH:
2049                 scmd->result = DID_IMM_RETRY << 16;
2050                 break;
2051         default:
2052                 scmd->result = DID_ERROR << 16;
2053                 break;
2054         }
2055 }
2056
2057 /**
2058  * megasas_is_prp_possible -
2059  * Checks if native NVMe PRPs can be built for the IO
2060  *
2061  * @instance:           Adapter soft state
2062  * @scmd:               SCSI command from the mid-layer
2063  * @sge_count:          scatter gather element count.
2064  *
2065  * Returns:             true: PRPs can be built
2066  *                      false: IEEE SGLs needs to be built
2067  */
2068 static bool
2069 megasas_is_prp_possible(struct megasas_instance *instance,
2070                         struct scsi_cmnd *scmd, int sge_count)
2071 {
2072         int i;
2073         u32 data_length = 0;
2074         struct scatterlist *sg_scmd;
2075         bool build_prp = false;
2076         u32 mr_nvme_pg_size;
2077
2078         mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
2079                                 MR_DEFAULT_NVME_PAGE_SIZE);
2080         data_length = scsi_bufflen(scmd);
2081         sg_scmd = scsi_sglist(scmd);
2082
2083         /*
2084          * NVMe uses one PRP for each page (or part of a page)
2085          * look at the data length - if 4 pages or less then IEEE is OK
2086          * if  > 5 pages then we need to build a native SGL
2087          * if > 4 and <= 5 pages, then check physical address of 1st SG entry
2088          * if this first size in the page is >= the residual beyond 4 pages
2089          * then use IEEE, otherwise use native SGL
2090          */
2091
2092         if (data_length > (mr_nvme_pg_size * 5)) {
2093                 build_prp = true;
2094         } else if ((data_length > (mr_nvme_pg_size * 4)) &&
2095                         (data_length <= (mr_nvme_pg_size * 5)))  {
2096                 /* check if 1st SG entry size is < residual beyond 4 pages */
2097                 if (sg_dma_len(sg_scmd) < (data_length - (mr_nvme_pg_size * 4)))
2098                         build_prp = true;
2099         }
2100
2101 /*
2102  * Below code detects gaps/holes in IO data buffers.
2103  * What does holes/gaps mean?
2104  * Any SGE except first one in a SGL starts at non NVME page size
2105  * aligned address OR Any SGE except last one in a SGL ends at
2106  * non NVME page size boundary.
2107  *
2108  * Driver has already informed block layer by setting boundary rules for
2109  * bio merging done at NVME page size boundary calling kernel API
2110  * blk_queue_virt_boundary inside slave_config.
2111  * Still there is possibility of IO coming with holes to driver because of
2112  * IO merging done by IO scheduler.
2113  *
2114  * With SCSI BLK MQ enabled, there will be no IO with holes as there is no
2115  * IO scheduling so no IO merging.
2116  *
2117  * With SCSI BLK MQ disabled, IO scheduler may attempt to merge IOs and
2118  * then sending IOs with holes.
2119  *
2120  * Though driver can request block layer to disable IO merging by calling-
2121  * blk_queue_flag_set(QUEUE_FLAG_NOMERGES, sdev->request_queue) but
2122  * user may tune sysfs parameter- nomerges again to 0 or 1.
2123  *
2124  * If in future IO scheduling is enabled with SCSI BLK MQ,
2125  * this algorithm to detect holes will be required in driver
2126  * for SCSI BLK MQ enabled case as well.
2127  *
2128  *
2129  */
2130         scsi_for_each_sg(scmd, sg_scmd, sge_count, i) {
2131                 if ((i != 0) && (i != (sge_count - 1))) {
2132                         if (mega_mod64(sg_dma_len(sg_scmd), mr_nvme_pg_size) ||
2133                             mega_mod64(sg_dma_address(sg_scmd),
2134                                        mr_nvme_pg_size)) {
2135                                 build_prp = false;
2136                                 break;
2137                         }
2138                 }
2139
2140                 if ((sge_count > 1) && (i == 0)) {
2141                         if ((mega_mod64((sg_dma_address(sg_scmd) +
2142                                         sg_dma_len(sg_scmd)),
2143                                         mr_nvme_pg_size))) {
2144                                 build_prp = false;
2145                                 break;
2146                         }
2147                 }
2148
2149                 if ((sge_count > 1) && (i == (sge_count - 1))) {
2150                         if (mega_mod64(sg_dma_address(sg_scmd),
2151                                        mr_nvme_pg_size)) {
2152                                 build_prp = false;
2153                                 break;
2154                         }
2155                 }
2156         }
2157
2158         return build_prp;
2159 }
2160
2161 /**
2162  * megasas_make_prp_nvme -
2163  * Prepare PRPs(Physical Region Page)- SGLs specific to NVMe drives only
2164  *
2165  * @instance:           Adapter soft state
2166  * @scmd:               SCSI command from the mid-layer
2167  * @sgl_ptr:            SGL to be filled in
2168  * @cmd:                Fusion command frame
2169  * @sge_count:          scatter gather element count.
2170  *
2171  * Returns:             true: PRPs are built
2172  *                      false: IEEE SGLs needs to be built
2173  */
2174 static bool
2175 megasas_make_prp_nvme(struct megasas_instance *instance, struct scsi_cmnd *scmd,
2176                       struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
2177                       struct megasas_cmd_fusion *cmd, int sge_count)
2178 {
2179         int sge_len, offset, num_prp_in_chain = 0;
2180         struct MPI25_IEEE_SGE_CHAIN64 *main_chain_element, *ptr_first_sgl;
2181         u64 *ptr_sgl;
2182         dma_addr_t ptr_sgl_phys;
2183         u64 sge_addr;
2184         u32 page_mask, page_mask_result;
2185         struct scatterlist *sg_scmd;
2186         u32 first_prp_len;
2187         bool build_prp = false;
2188         int data_len = scsi_bufflen(scmd);
2189         u32 mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
2190                                         MR_DEFAULT_NVME_PAGE_SIZE);
2191
2192         build_prp = megasas_is_prp_possible(instance, scmd, sge_count);
2193
2194         if (!build_prp)
2195                 return false;
2196
2197         /*
2198          * Nvme has a very convoluted prp format.  One prp is required
2199          * for each page or partial page. Driver need to split up OS sg_list
2200          * entries if it is longer than one page or cross a page
2201          * boundary.  Driver also have to insert a PRP list pointer entry as
2202          * the last entry in each physical page of the PRP list.
2203          *
2204          * NOTE: The first PRP "entry" is actually placed in the first
2205          * SGL entry in the main message as IEEE 64 format.  The 2nd
2206          * entry in the main message is the chain element, and the rest
2207          * of the PRP entries are built in the contiguous pcie buffer.
2208          */
2209         page_mask = mr_nvme_pg_size - 1;
2210         ptr_sgl = (u64 *)cmd->sg_frame;
2211         ptr_sgl_phys = cmd->sg_frame_phys_addr;
2212         memset(ptr_sgl, 0, instance->max_chain_frame_sz);
2213
2214         /* Build chain frame element which holds all prps except first*/
2215         main_chain_element = (struct MPI25_IEEE_SGE_CHAIN64 *)
2216             ((u8 *)sgl_ptr + sizeof(struct MPI25_IEEE_SGE_CHAIN64));
2217
2218         main_chain_element->Address = cpu_to_le64(ptr_sgl_phys);
2219         main_chain_element->NextChainOffset = 0;
2220         main_chain_element->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2221                                         IEEE_SGE_FLAGS_SYSTEM_ADDR |
2222                                         MPI26_IEEE_SGE_FLAGS_NSF_NVME_PRP;
2223
2224         /* Build first prp, sge need not to be page aligned*/
2225         ptr_first_sgl = sgl_ptr;
2226         sg_scmd = scsi_sglist(scmd);
2227         sge_addr = sg_dma_address(sg_scmd);
2228         sge_len = sg_dma_len(sg_scmd);
2229
2230         offset = (u32)(sge_addr & page_mask);
2231         first_prp_len = mr_nvme_pg_size - offset;
2232
2233         ptr_first_sgl->Address = cpu_to_le64(sge_addr);
2234         ptr_first_sgl->Length = cpu_to_le32(first_prp_len);
2235
2236         data_len -= first_prp_len;
2237
2238         if (sge_len > first_prp_len) {
2239                 sge_addr += first_prp_len;
2240                 sge_len -= first_prp_len;
2241         } else if (sge_len == first_prp_len) {
2242                 sg_scmd = sg_next(sg_scmd);
2243                 sge_addr = sg_dma_address(sg_scmd);
2244                 sge_len = sg_dma_len(sg_scmd);
2245         }
2246
2247         for (;;) {
2248                 offset = (u32)(sge_addr & page_mask);
2249
2250                 /* Put PRP pointer due to page boundary*/
2251                 page_mask_result = (uintptr_t)(ptr_sgl + 1) & page_mask;
2252                 if (unlikely(!page_mask_result)) {
2253                         scmd_printk(KERN_NOTICE,
2254                                     scmd, "page boundary ptr_sgl: 0x%p\n",
2255                                     ptr_sgl);
2256                         ptr_sgl_phys += 8;
2257                         *ptr_sgl = cpu_to_le64(ptr_sgl_phys);
2258                         ptr_sgl++;
2259                         num_prp_in_chain++;
2260                 }
2261
2262                 *ptr_sgl = cpu_to_le64(sge_addr);
2263                 ptr_sgl++;
2264                 ptr_sgl_phys += 8;
2265                 num_prp_in_chain++;
2266
2267                 sge_addr += mr_nvme_pg_size;
2268                 sge_len -= mr_nvme_pg_size;
2269                 data_len -= mr_nvme_pg_size;
2270
2271                 if (data_len <= 0)
2272                         break;
2273
2274                 if (sge_len > 0)
2275                         continue;
2276
2277                 sg_scmd = sg_next(sg_scmd);
2278                 sge_addr = sg_dma_address(sg_scmd);
2279                 sge_len = sg_dma_len(sg_scmd);
2280         }
2281
2282         main_chain_element->Length =
2283                         cpu_to_le32(num_prp_in_chain * sizeof(u64));
2284
2285         return build_prp;
2286 }
2287
2288 /**
2289  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
2290  * @instance:           Adapter soft state
2291  * @scp:                SCSI command from the mid-layer
2292  * @sgl_ptr:            SGL to be filled in
2293  * @cmd:                cmd we are working on
2294  * @sge_count           sge count
2295  *
2296  */
2297 static void
2298 megasas_make_sgl_fusion(struct megasas_instance *instance,
2299                         struct scsi_cmnd *scp,
2300                         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
2301                         struct megasas_cmd_fusion *cmd, int sge_count)
2302 {
2303         int i, sg_processed;
2304         struct scatterlist *os_sgl;
2305         struct fusion_context *fusion;
2306
2307         fusion = instance->ctrl_context;
2308
2309         if (instance->adapter_type >= INVADER_SERIES) {
2310                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
2311                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
2312                 sgl_ptr_end->Flags = 0;
2313         }
2314
2315         scsi_for_each_sg(scp, os_sgl, sge_count, i) {
2316                 sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl));
2317                 sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl));
2318                 sgl_ptr->Flags = 0;
2319                 if (instance->adapter_type >= INVADER_SERIES)
2320                         if (i == sge_count - 1)
2321                                 sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
2322                 sgl_ptr++;
2323                 sg_processed = i + 1;
2324
2325                 if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
2326                     (sge_count > fusion->max_sge_in_main_msg)) {
2327
2328                         struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
2329                         if (instance->adapter_type >= INVADER_SERIES) {
2330                                 if ((le16_to_cpu(cmd->io_request->IoFlags) &
2331                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
2332                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
2333                                         cmd->io_request->ChainOffset =
2334                                                 fusion->
2335                                                 chain_offset_io_request;
2336                                 else
2337                                         cmd->io_request->ChainOffset = 0;
2338                         } else
2339                                 cmd->io_request->ChainOffset =
2340                                         fusion->chain_offset_io_request;
2341
2342                         sg_chain = sgl_ptr;
2343                         /* Prepare chain element */
2344                         sg_chain->NextChainOffset = 0;
2345                         if (instance->adapter_type >= INVADER_SERIES)
2346                                 sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
2347                         else
2348                                 sg_chain->Flags =
2349                                         (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2350                                          MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
2351                         sg_chain->Length =  cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed)));
2352                         sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr);
2353
2354                         sgl_ptr =
2355                           (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
2356                         memset(sgl_ptr, 0, instance->max_chain_frame_sz);
2357                 }
2358         }
2359 }
2360
2361 /**
2362  * megasas_make_sgl -   Build Scatter Gather List(SGLs)
2363  * @scp:                SCSI command pointer
2364  * @instance:           Soft instance of controller
2365  * @cmd:                Fusion command pointer
2366  *
2367  * This function will build sgls based on device type.
2368  * For nvme drives, there is different way of building sgls in nvme native
2369  * format- PRPs(Physical Region Page).
2370  *
2371  * Returns the number of sg lists actually used, zero if the sg lists
2372  * is NULL, or -ENOMEM if the mapping failed
2373  */
2374 static
2375 int megasas_make_sgl(struct megasas_instance *instance, struct scsi_cmnd *scp,
2376                      struct megasas_cmd_fusion *cmd)
2377 {
2378         int sge_count;
2379         bool build_prp = false;
2380         struct MPI25_IEEE_SGE_CHAIN64 *sgl_chain64;
2381
2382         sge_count = scsi_dma_map(scp);
2383
2384         if ((sge_count > instance->max_num_sge) || (sge_count <= 0))
2385                 return sge_count;
2386
2387         sgl_chain64 = (struct MPI25_IEEE_SGE_CHAIN64 *)&cmd->io_request->SGL;
2388         if ((le16_to_cpu(cmd->io_request->IoFlags) &
2389             MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) &&
2390             (cmd->pd_interface == NVME_PD))
2391                 build_prp = megasas_make_prp_nvme(instance, scp, sgl_chain64,
2392                                                   cmd, sge_count);
2393
2394         if (!build_prp)
2395                 megasas_make_sgl_fusion(instance, scp, sgl_chain64,
2396                                         cmd, sge_count);
2397
2398         return sge_count;
2399 }
2400
2401 /**
2402  * megasas_set_pd_lba - Sets PD LBA
2403  * @cdb:                CDB
2404  * @cdb_len:            cdb length
2405  * @start_blk:          Start block of IO
2406  *
2407  * Used to set the PD LBA in CDB for FP IOs
2408  */
2409 static void
2410 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
2411                    struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
2412                    struct MR_DRV_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
2413 {
2414         struct MR_LD_RAID *raid;
2415         u16 ld;
2416         u64 start_blk = io_info->pdBlock;
2417         u8 *cdb = io_request->CDB.CDB32;
2418         u32 num_blocks = io_info->numBlocks;
2419         u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
2420
2421         /* Check if T10 PI (DIF) is enabled for this LD */
2422         ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
2423         raid = MR_LdRaidGet(ld, local_map_ptr);
2424         if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
2425                 memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2426                 cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
2427                 cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
2428
2429                 if (scp->sc_data_direction == DMA_FROM_DEVICE)
2430                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
2431                 else
2432                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
2433                 cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
2434
2435                 /* LBA */
2436                 cdb[12] = (u8)((start_blk >> 56) & 0xff);
2437                 cdb[13] = (u8)((start_blk >> 48) & 0xff);
2438                 cdb[14] = (u8)((start_blk >> 40) & 0xff);
2439                 cdb[15] = (u8)((start_blk >> 32) & 0xff);
2440                 cdb[16] = (u8)((start_blk >> 24) & 0xff);
2441                 cdb[17] = (u8)((start_blk >> 16) & 0xff);
2442                 cdb[18] = (u8)((start_blk >> 8) & 0xff);
2443                 cdb[19] = (u8)(start_blk & 0xff);
2444
2445                 /* Logical block reference tag */
2446                 io_request->CDB.EEDP32.PrimaryReferenceTag =
2447                         cpu_to_be32(ref_tag);
2448                 io_request->CDB.EEDP32.PrimaryApplicationTagMask = cpu_to_be16(0xffff);
2449                 io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */
2450
2451                 /* Transfer length */
2452                 cdb[28] = (u8)((num_blocks >> 24) & 0xff);
2453                 cdb[29] = (u8)((num_blocks >> 16) & 0xff);
2454                 cdb[30] = (u8)((num_blocks >> 8) & 0xff);
2455                 cdb[31] = (u8)(num_blocks & 0xff);
2456
2457                 /* set SCSI IO EEDPFlags */
2458                 if (scp->sc_data_direction == DMA_FROM_DEVICE) {
2459                         io_request->EEDPFlags = cpu_to_le16(
2460                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
2461                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
2462                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
2463                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
2464                                 MPI25_SCSIIO_EEDPFLAGS_DO_NOT_DISABLE_MODE |
2465                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD);
2466                 } else {
2467                         io_request->EEDPFlags = cpu_to_le16(
2468                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
2469                                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP);
2470                 }
2471                 io_request->Control |= cpu_to_le32((0x4 << 26));
2472                 io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size);
2473         } else {
2474                 /* Some drives don't support 16/12 byte CDB's, convert to 10 */
2475                 if (((cdb_len == 12) || (cdb_len == 16)) &&
2476                     (start_blk <= 0xffffffff)) {
2477                         if (cdb_len == 16) {
2478                                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
2479                                 flagvals = cdb[1];
2480                                 groupnum = cdb[14];
2481                                 control = cdb[15];
2482                         } else {
2483                                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
2484                                 flagvals = cdb[1];
2485                                 groupnum = cdb[10];
2486                                 control = cdb[11];
2487                         }
2488
2489                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2490
2491                         cdb[0] = opcode;
2492                         cdb[1] = flagvals;
2493                         cdb[6] = groupnum;
2494                         cdb[9] = control;
2495
2496                         /* Transfer length */
2497                         cdb[8] = (u8)(num_blocks & 0xff);
2498                         cdb[7] = (u8)((num_blocks >> 8) & 0xff);
2499
2500                         io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */
2501                         cdb_len = 10;
2502                 } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
2503                         /* Convert to 16 byte CDB for large LBA's */
2504                         switch (cdb_len) {
2505                         case 6:
2506                                 opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
2507                                 control = cdb[5];
2508                                 break;
2509                         case 10:
2510                                 opcode =
2511                                         cdb[0] == READ_10 ? READ_16 : WRITE_16;
2512                                 flagvals = cdb[1];
2513                                 groupnum = cdb[6];
2514                                 control = cdb[9];
2515                                 break;
2516                         case 12:
2517                                 opcode =
2518                                         cdb[0] == READ_12 ? READ_16 : WRITE_16;
2519                                 flagvals = cdb[1];
2520                                 groupnum = cdb[10];
2521                                 control = cdb[11];
2522                                 break;
2523                         }
2524
2525                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2526
2527                         cdb[0] = opcode;
2528                         cdb[1] = flagvals;
2529                         cdb[14] = groupnum;
2530                         cdb[15] = control;
2531
2532                         /* Transfer length */
2533                         cdb[13] = (u8)(num_blocks & 0xff);
2534                         cdb[12] = (u8)((num_blocks >> 8) & 0xff);
2535                         cdb[11] = (u8)((num_blocks >> 16) & 0xff);
2536                         cdb[10] = (u8)((num_blocks >> 24) & 0xff);
2537
2538                         io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */
2539                         cdb_len = 16;
2540                 }
2541
2542                 /* Normal case, just load LBA here */
2543                 switch (cdb_len) {
2544                 case 6:
2545                 {
2546                         u8 val = cdb[1] & 0xE0;
2547                         cdb[3] = (u8)(start_blk & 0xff);
2548                         cdb[2] = (u8)((start_blk >> 8) & 0xff);
2549                         cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
2550                         break;
2551                 }
2552                 case 10:
2553                         cdb[5] = (u8)(start_blk & 0xff);
2554                         cdb[4] = (u8)((start_blk >> 8) & 0xff);
2555                         cdb[3] = (u8)((start_blk >> 16) & 0xff);
2556                         cdb[2] = (u8)((start_blk >> 24) & 0xff);
2557                         break;
2558                 case 12:
2559                         cdb[5]    = (u8)(start_blk & 0xff);
2560                         cdb[4]    = (u8)((start_blk >> 8) & 0xff);
2561                         cdb[3]    = (u8)((start_blk >> 16) & 0xff);
2562                         cdb[2]    = (u8)((start_blk >> 24) & 0xff);
2563                         break;
2564                 case 16:
2565                         cdb[9]    = (u8)(start_blk & 0xff);
2566                         cdb[8]    = (u8)((start_blk >> 8) & 0xff);
2567                         cdb[7]    = (u8)((start_blk >> 16) & 0xff);
2568                         cdb[6]    = (u8)((start_blk >> 24) & 0xff);
2569                         cdb[5]    = (u8)((start_blk >> 32) & 0xff);
2570                         cdb[4]    = (u8)((start_blk >> 40) & 0xff);
2571                         cdb[3]    = (u8)((start_blk >> 48) & 0xff);
2572                         cdb[2]    = (u8)((start_blk >> 56) & 0xff);
2573                         break;
2574                 }
2575         }
2576 }
2577
2578 /**
2579  * megasas_stream_detect -      stream detection on read and and write IOs
2580  * @instance:           Adapter soft state
2581  * @cmd:                    Command to be prepared
2582  * @io_info:            IO Request info
2583  *
2584  */
2585
2586 /** stream detection on read and and write IOs */
2587 static void megasas_stream_detect(struct megasas_instance *instance,
2588                                   struct megasas_cmd_fusion *cmd,
2589                                   struct IO_REQUEST_INFO *io_info)
2590 {
2591         struct fusion_context *fusion = instance->ctrl_context;
2592         u32 device_id = io_info->ldTgtId;
2593         struct LD_STREAM_DETECT *current_ld_sd
2594                 = fusion->stream_detect_by_ld[device_id];
2595         u32 *track_stream = &current_ld_sd->mru_bit_map, stream_num;
2596         u32 shifted_values, unshifted_values;
2597         u32 index_value_mask, shifted_values_mask;
2598         int i;
2599         bool is_read_ahead = false;
2600         struct STREAM_DETECT *current_sd;
2601         /* find possible stream */
2602         for (i = 0; i < MAX_STREAMS_TRACKED; ++i) {
2603                 stream_num = (*track_stream >>
2604                         (i * BITS_PER_INDEX_STREAM)) &
2605                         STREAM_MASK;
2606                 current_sd = &current_ld_sd->stream_track[stream_num];
2607                 /* if we found a stream, update the raid
2608                  *  context and also update the mruBitMap
2609                  */
2610                 /*      boundary condition */
2611                 if ((current_sd->next_seq_lba) &&
2612                     (io_info->ldStartBlock >= current_sd->next_seq_lba) &&
2613                     (io_info->ldStartBlock <= (current_sd->next_seq_lba + 32)) &&
2614                     (current_sd->is_read == io_info->isRead)) {
2615
2616                         if ((io_info->ldStartBlock != current_sd->next_seq_lba) &&
2617                             ((!io_info->isRead) || (!is_read_ahead)))
2618                                 /*
2619                                  * Once the API availible we need to change this.
2620                                  * At this point we are not allowing any gap
2621                                  */
2622                                 continue;
2623
2624                         SET_STREAM_DETECTED(cmd->io_request->RaidContext.raid_context_g35);
2625                         current_sd->next_seq_lba =
2626                         io_info->ldStartBlock + io_info->numBlocks;
2627                         /*
2628                          *      update the mruBitMap LRU
2629                          */
2630                         shifted_values_mask =
2631                                 (1 <<  i * BITS_PER_INDEX_STREAM) - 1;
2632                         shifted_values = ((*track_stream & shifted_values_mask)
2633                                                 << BITS_PER_INDEX_STREAM);
2634                         index_value_mask =
2635                                 STREAM_MASK << i * BITS_PER_INDEX_STREAM;
2636                         unshifted_values =
2637                                 *track_stream & ~(shifted_values_mask |
2638                                 index_value_mask);
2639                         *track_stream =
2640                                 unshifted_values | shifted_values | stream_num;
2641                         return;
2642                 }
2643         }
2644         /*
2645          * if we did not find any stream, create a new one
2646          * from the least recently used
2647          */
2648         stream_num = (*track_stream >>
2649                 ((MAX_STREAMS_TRACKED - 1) * BITS_PER_INDEX_STREAM)) &
2650                 STREAM_MASK;
2651         current_sd = &current_ld_sd->stream_track[stream_num];
2652         current_sd->is_read = io_info->isRead;
2653         current_sd->next_seq_lba = io_info->ldStartBlock + io_info->numBlocks;
2654         *track_stream = (((*track_stream & ZERO_LAST_STREAM) << 4) | stream_num);
2655         return;
2656 }
2657
2658 /**
2659  * megasas_set_raidflag_cpu_affinity - This function sets the cpu
2660  * affinity (cpu of the controller) and raid_flags in the raid context
2661  * based on IO type.
2662  *
2663  * @praid_context:      IO RAID context
2664  * @raid:               LD raid map
2665  * @fp_possible:        Is fast path possible?
2666  * @is_read:            Is read IO?
2667  *
2668  */
2669 static void
2670 megasas_set_raidflag_cpu_affinity(struct fusion_context *fusion,
2671                                 union RAID_CONTEXT_UNION *praid_context,
2672                                 struct MR_LD_RAID *raid, bool fp_possible,
2673                                 u8 is_read, u32 scsi_buff_len)
2674 {
2675         u8 cpu_sel = MR_RAID_CTX_CPUSEL_0;
2676         struct RAID_CONTEXT_G35 *rctx_g35;
2677
2678         rctx_g35 = &praid_context->raid_context_g35;
2679         if (fp_possible) {
2680                 if (is_read) {
2681                         if ((raid->cpuAffinity.pdRead.cpu0) &&
2682                             (raid->cpuAffinity.pdRead.cpu1))
2683                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2684                         else if (raid->cpuAffinity.pdRead.cpu1)
2685                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2686                 } else {
2687                         if ((raid->cpuAffinity.pdWrite.cpu0) &&
2688                             (raid->cpuAffinity.pdWrite.cpu1))
2689                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2690                         else if (raid->cpuAffinity.pdWrite.cpu1)
2691                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2692                         /* Fast path cache by pass capable R0/R1 VD */
2693                         if ((raid->level <= 1) &&
2694                             (raid->capability.fp_cache_bypass_capable)) {
2695                                 rctx_g35->routing_flags |=
2696                                         (1 << MR_RAID_CTX_ROUTINGFLAGS_SLD_SHIFT);
2697                                 rctx_g35->raid_flags =
2698                                         (MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS
2699                                         << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
2700                         }
2701                 }
2702         } else {
2703                 if (is_read) {
2704                         if ((raid->cpuAffinity.ldRead.cpu0) &&
2705                             (raid->cpuAffinity.ldRead.cpu1))
2706                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2707                         else if (raid->cpuAffinity.ldRead.cpu1)
2708                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2709                 } else {
2710                         if ((raid->cpuAffinity.ldWrite.cpu0) &&
2711                             (raid->cpuAffinity.ldWrite.cpu1))
2712                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2713                         else if (raid->cpuAffinity.ldWrite.cpu1)
2714                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2715
2716                         if (is_stream_detected(rctx_g35) &&
2717                             ((raid->level == 5) || (raid->level == 6)) &&
2718                             (raid->writeMode == MR_RL_WRITE_THROUGH_MODE) &&
2719                             (cpu_sel == MR_RAID_CTX_CPUSEL_FCFS))
2720                                 cpu_sel = MR_RAID_CTX_CPUSEL_0;
2721                 }
2722         }
2723
2724         rctx_g35->routing_flags |=
2725                 (cpu_sel << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
2726
2727         /* Always give priority to MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
2728          * vs MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS.
2729          * IO Subtype is not bitmap.
2730          */
2731         if ((fusion->pcie_bw_limitation) && (raid->level == 1) && (!is_read) &&
2732                         (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)) {
2733                 praid_context->raid_context_g35.raid_flags =
2734                         (MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
2735                         << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
2736         }
2737 }
2738
2739 /**
2740  * megasas_build_ldio_fusion -  Prepares IOs to devices
2741  * @instance:           Adapter soft state
2742  * @scp:                SCSI command
2743  * @cmd:                Command to be prepared
2744  *
2745  * Prepares the io_request and chain elements (sg_frame) for IO
2746  * The IO can be for PD (Fast Path) or LD
2747  */
2748 static void
2749 megasas_build_ldio_fusion(struct megasas_instance *instance,
2750                           struct scsi_cmnd *scp,
2751                           struct megasas_cmd_fusion *cmd)
2752 {
2753         bool fp_possible;
2754         u16 ld;
2755         u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
2756         u32 scsi_buff_len;
2757         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
2758         struct IO_REQUEST_INFO io_info;
2759         struct fusion_context *fusion;
2760         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
2761         u8 *raidLUN;
2762         unsigned long spinlock_flags;
2763         struct MR_LD_RAID *raid = NULL;
2764         struct MR_PRIV_DEVICE *mrdev_priv;
2765         struct RAID_CONTEXT *rctx;
2766         struct RAID_CONTEXT_G35 *rctx_g35;
2767
2768         device_id = MEGASAS_DEV_INDEX(scp);
2769
2770         fusion = instance->ctrl_context;
2771
2772         io_request = cmd->io_request;
2773         rctx = &io_request->RaidContext.raid_context;
2774         rctx_g35 = &io_request->RaidContext.raid_context_g35;
2775
2776         rctx->virtual_disk_tgt_id = cpu_to_le16(device_id);
2777         rctx->status = 0;
2778         rctx->ex_status = 0;
2779
2780         start_lba_lo = 0;
2781         start_lba_hi = 0;
2782         fp_possible = false;
2783
2784         /*
2785          * 6-byte READ(0x08) or WRITE(0x0A) cdb
2786          */
2787         if (scp->cmd_len == 6) {
2788                 datalength = (u32) scp->cmnd[4];
2789                 start_lba_lo = ((u32) scp->cmnd[1] << 16) |
2790                         ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
2791
2792                 start_lba_lo &= 0x1FFFFF;
2793         }
2794
2795         /*
2796          * 10-byte READ(0x28) or WRITE(0x2A) cdb
2797          */
2798         else if (scp->cmd_len == 10) {
2799                 datalength = (u32) scp->cmnd[8] |
2800                         ((u32) scp->cmnd[7] << 8);
2801                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
2802                         ((u32) scp->cmnd[3] << 16) |
2803                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2804         }
2805
2806         /*
2807          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
2808          */
2809         else if (scp->cmd_len == 12) {
2810                 datalength = ((u32) scp->cmnd[6] << 24) |
2811                         ((u32) scp->cmnd[7] << 16) |
2812                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
2813                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
2814                         ((u32) scp->cmnd[3] << 16) |
2815                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2816         }
2817
2818         /*
2819          * 16-byte READ(0x88) or WRITE(0x8A) cdb
2820          */
2821         else if (scp->cmd_len == 16) {
2822                 datalength = ((u32) scp->cmnd[10] << 24) |
2823                         ((u32) scp->cmnd[11] << 16) |
2824                         ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
2825                 start_lba_lo = ((u32) scp->cmnd[6] << 24) |
2826                         ((u32) scp->cmnd[7] << 16) |
2827                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
2828
2829                 start_lba_hi = ((u32) scp->cmnd[2] << 24) |
2830                         ((u32) scp->cmnd[3] << 16) |
2831                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2832         }
2833
2834         memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
2835         io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
2836         io_info.numBlocks = datalength;
2837         io_info.ldTgtId = device_id;
2838         io_info.r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
2839         scsi_buff_len = scsi_bufflen(scp);
2840         io_request->DataLength = cpu_to_le32(scsi_buff_len);
2841         io_info.data_arms = 1;
2842
2843         if (scp->sc_data_direction == DMA_FROM_DEVICE)
2844                 io_info.isRead = 1;
2845
2846         local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
2847         ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
2848
2849         if (ld < instance->fw_supported_vd_count)
2850                 raid = MR_LdRaidGet(ld, local_map_ptr);
2851
2852         if (!raid || (!fusion->fast_path_io)) {
2853                 rctx->reg_lock_flags  = 0;
2854                 fp_possible = false;
2855         } else {
2856                 if (MR_BuildRaidContext(instance, &io_info, rctx,
2857                                         local_map_ptr, &raidLUN))
2858                         fp_possible = (io_info.fpOkForIo > 0) ? true : false;
2859         }
2860
2861         megasas_get_msix_index(instance, scp, cmd, io_info.data_arms);
2862
2863         if (instance->adapter_type >= VENTURA_SERIES) {
2864                 /* FP for Optimal raid level 1.
2865                  * All large RAID-1 writes (> 32 KiB, both WT and WB modes)
2866                  * are built by the driver as LD I/Os.
2867                  * All small RAID-1 WT writes (<= 32 KiB) are built as FP I/Os
2868                  * (there is never a reason to process these as buffered writes)
2869                  * All small RAID-1 WB writes (<= 32 KiB) are built as FP I/Os
2870                  * with the SLD bit asserted.
2871                  */
2872                 if (io_info.r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
2873                         mrdev_priv = scp->device->hostdata;
2874
2875                         if (atomic_inc_return(&instance->fw_outstanding) >
2876                                 (instance->host->can_queue)) {
2877                                 fp_possible = false;
2878                                 atomic_dec(&instance->fw_outstanding);
2879                         } else if (fusion->pcie_bw_limitation &&
2880                                 ((scsi_buff_len > MR_LARGE_IO_MIN_SIZE) ||
2881                                    (atomic_dec_if_positive(&mrdev_priv->r1_ldio_hint) > 0))) {
2882                                 fp_possible = false;
2883                                 atomic_dec(&instance->fw_outstanding);
2884                                 if (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)
2885                                         atomic_set(&mrdev_priv->r1_ldio_hint,
2886                                                    instance->r1_ldio_hint_default);
2887                         }
2888                 }
2889
2890                 if (!fp_possible ||
2891                     (io_info.isRead && io_info.ra_capable)) {
2892                         spin_lock_irqsave(&instance->stream_lock,
2893                                           spinlock_flags);
2894                         megasas_stream_detect(instance, cmd, &io_info);
2895                         spin_unlock_irqrestore(&instance->stream_lock,
2896                                                spinlock_flags);
2897                         /* In ventura if stream detected for a read and it is
2898                          * read ahead capable make this IO as LDIO
2899                          */
2900                         if (is_stream_detected(rctx_g35))
2901                                 fp_possible = false;
2902                 }
2903
2904                 /* If raid is NULL, set CPU affinity to default CPU0 */
2905                 if (raid)
2906                         megasas_set_raidflag_cpu_affinity(fusion, &io_request->RaidContext,
2907                                 raid, fp_possible, io_info.isRead,
2908                                 scsi_buff_len);
2909                 else
2910                         rctx_g35->routing_flags |=
2911                                 (MR_RAID_CTX_CPUSEL_0 << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
2912         }
2913
2914         if (fp_possible) {
2915                 megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
2916                                    local_map_ptr, start_lba_lo);
2917                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
2918                 cmd->request_desc->SCSIIO.RequestFlags =
2919                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO
2920                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2921                 if (instance->adapter_type == INVADER_SERIES) {
2922                         rctx->type = MPI2_TYPE_CUDA;
2923                         rctx->nseg = 0x1;
2924                         io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
2925                         rctx->reg_lock_flags |=
2926                           (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
2927                            MR_RL_FLAGS_SEQ_NUM_ENABLE);
2928                 } else if (instance->adapter_type >= VENTURA_SERIES) {
2929                         rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
2930                         rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2931                         rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2932                         io_request->IoFlags |=
2933                                 cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
2934                 }
2935                 if (fusion->load_balance_info &&
2936                         (fusion->load_balance_info[device_id].loadBalanceFlag) &&
2937                         (io_info.isRead)) {
2938                         io_info.devHandle =
2939                                 get_updated_dev_handle(instance,
2940                                         &fusion->load_balance_info[device_id],
2941                                         &io_info, local_map_ptr);
2942                         scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
2943                         cmd->pd_r1_lb = io_info.pd_after_lb;
2944                         if (instance->adapter_type >= VENTURA_SERIES)
2945                                 rctx_g35->span_arm = io_info.span_arm;
2946                         else
2947                                 rctx->span_arm = io_info.span_arm;
2948
2949                 } else
2950                         scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
2951
2952                 if (instance->adapter_type >= VENTURA_SERIES)
2953                         cmd->r1_alt_dev_handle = io_info.r1_alt_dev_handle;
2954                 else
2955                         cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
2956
2957                 if ((raidLUN[0] == 1) &&
2958                         (local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].validHandles > 1)) {
2959                         instance->dev_handle = !(instance->dev_handle);
2960                         io_info.devHandle =
2961                                 local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].devHandle[instance->dev_handle];
2962                 }
2963
2964                 cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
2965                 io_request->DevHandle = io_info.devHandle;
2966                 cmd->pd_interface = io_info.pd_interface;
2967                 /* populate the LUN field */
2968                 memcpy(io_request->LUN, raidLUN, 8);
2969         } else {
2970                 rctx->timeout_value =
2971                         cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
2972                 cmd->request_desc->SCSIIO.RequestFlags =
2973                         (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
2974                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2975                 if (instance->adapter_type == INVADER_SERIES) {
2976                         if (io_info.do_fp_rlbypass ||
2977                         (rctx->reg_lock_flags == REGION_TYPE_UNUSED))
2978                                 cmd->request_desc->SCSIIO.RequestFlags =
2979                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
2980                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2981                         rctx->type = MPI2_TYPE_CUDA;
2982                         rctx->reg_lock_flags |=
2983                                 (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
2984                                         MR_RL_FLAGS_SEQ_NUM_ENABLE);
2985                         rctx->nseg = 0x1;
2986                 } else if (instance->adapter_type >= VENTURA_SERIES) {
2987                         rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2988                         rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
2989                         rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2990                 }
2991                 io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
2992                 io_request->DevHandle = cpu_to_le16(device_id);
2993
2994         } /* Not FP */
2995 }
2996
2997 /**
2998  * megasas_build_ld_nonrw_fusion - prepares non rw ios for virtual disk
2999  * @instance:           Adapter soft state
3000  * @scp:                SCSI command
3001  * @cmd:                Command to be prepared
3002  *
3003  * Prepares the io_request frame for non-rw io cmds for vd.
3004  */
3005 static void megasas_build_ld_nonrw_fusion(struct megasas_instance *instance,
3006                           struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd)
3007 {
3008         u32 device_id;
3009         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
3010         u16 ld;
3011         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
3012         struct fusion_context *fusion = instance->ctrl_context;
3013         u8                          span, physArm;
3014         __le16                      devHandle;
3015         u32                         arRef, pd;
3016         struct MR_LD_RAID                  *raid;
3017         struct RAID_CONTEXT                *pRAID_Context;
3018         u8 fp_possible = 1;
3019
3020         io_request = cmd->io_request;
3021         device_id = MEGASAS_DEV_INDEX(scmd);
3022         local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
3023         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
3024         /* get RAID_Context pointer */
3025         pRAID_Context = &io_request->RaidContext.raid_context;
3026         /* Check with FW team */
3027         pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3028         pRAID_Context->reg_lock_row_lba    = 0;
3029         pRAID_Context->reg_lock_length    = 0;
3030
3031         if (fusion->fast_path_io && (
3032                 device_id < instance->fw_supported_vd_count)) {
3033
3034                 ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
3035                 if (ld >= instance->fw_supported_vd_count - 1)
3036                         fp_possible = 0;
3037                 else {
3038                         raid = MR_LdRaidGet(ld, local_map_ptr);
3039                         if (!(raid->capability.fpNonRWCapable))
3040                                 fp_possible = 0;
3041                 }
3042         } else
3043                 fp_possible = 0;
3044
3045         if (!fp_possible) {
3046                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
3047                 io_request->DevHandle = cpu_to_le16(device_id);
3048                 io_request->LUN[1] = scmd->device->lun;
3049                 pRAID_Context->timeout_value =
3050                         cpu_to_le16 (scmd->request->timeout / HZ);
3051                 cmd->request_desc->SCSIIO.RequestFlags =
3052                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3053                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3054         } else {
3055
3056                 /* set RAID context values */
3057                 pRAID_Context->config_seq_num = raid->seqNum;
3058                 if (instance->adapter_type < VENTURA_SERIES)
3059                         pRAID_Context->reg_lock_flags = REGION_TYPE_SHARED_READ;
3060                 pRAID_Context->timeout_value =
3061                         cpu_to_le16(raid->fpIoTimeoutForLd);
3062
3063                 /* get the DevHandle for the PD (since this is
3064                    fpNonRWCapable, this is a single disk RAID0) */
3065                 span = physArm = 0;
3066                 arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
3067                 pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
3068                 devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
3069
3070                 /* build request descriptor */
3071                 cmd->request_desc->SCSIIO.RequestFlags =
3072                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
3073                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3074                 cmd->request_desc->SCSIIO.DevHandle = devHandle;
3075
3076                 /* populate the LUN field */
3077                 memcpy(io_request->LUN, raid->LUN, 8);
3078
3079                 /* build the raidScsiIO structure */
3080                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
3081                 io_request->DevHandle = devHandle;
3082         }
3083 }
3084
3085 /**
3086  * megasas_build_syspd_fusion - prepares rw/non-rw ios for syspd
3087  * @instance:           Adapter soft state
3088  * @scp:                SCSI command
3089  * @cmd:                Command to be prepared
3090  * @fp_possible:        parameter to detect fast path or firmware path io.
3091  *
3092  * Prepares the io_request frame for rw/non-rw io cmds for syspds
3093  */
3094 static void
3095 megasas_build_syspd_fusion(struct megasas_instance *instance,
3096         struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd,
3097         bool fp_possible)
3098 {
3099         u32 device_id;
3100         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
3101         u16 pd_index = 0;
3102         u16 os_timeout_value;
3103         u16 timeout_limit;
3104         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
3105         struct RAID_CONTEXT     *pRAID_Context;
3106         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
3107         struct MR_PRIV_DEVICE *mr_device_priv_data;
3108         struct fusion_context *fusion = instance->ctrl_context;
3109         pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id - 1) & 1];
3110
3111         device_id = MEGASAS_DEV_INDEX(scmd);
3112         pd_index = MEGASAS_PD_INDEX(scmd);
3113         os_timeout_value = scmd->request->timeout / HZ;
3114         mr_device_priv_data = scmd->device->hostdata;
3115         cmd->pd_interface = mr_device_priv_data->interface_type;
3116
3117         io_request = cmd->io_request;
3118         /* get RAID_Context pointer */
3119         pRAID_Context = &io_request->RaidContext.raid_context;
3120         pRAID_Context->reg_lock_flags = 0;
3121         pRAID_Context->reg_lock_row_lba = 0;
3122         pRAID_Context->reg_lock_length = 0;
3123         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
3124         io_request->LUN[1] = scmd->device->lun;
3125         pRAID_Context->raid_flags = MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD
3126                 << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
3127
3128         /* If FW supports PD sequence number */
3129         if (instance->support_seqnum_jbod_fp) {
3130                 if (instance->use_seqnum_jbod_fp &&
3131                         instance->pd_list[pd_index].driveType == TYPE_DISK) {
3132
3133                         /* More than 256 PD/JBOD support for Ventura */
3134                         if (instance->support_morethan256jbod)
3135                                 pRAID_Context->virtual_disk_tgt_id =
3136                                         pd_sync->seq[pd_index].pd_target_id;
3137                         else
3138                                 pRAID_Context->virtual_disk_tgt_id =
3139                                         cpu_to_le16(device_id +
3140                                         (MAX_PHYSICAL_DEVICES - 1));
3141                         pRAID_Context->config_seq_num =
3142                                 pd_sync->seq[pd_index].seqNum;
3143                         io_request->DevHandle =
3144                                 pd_sync->seq[pd_index].devHandle;
3145                         if (instance->adapter_type >= VENTURA_SERIES) {
3146                                 io_request->RaidContext.raid_context_g35.routing_flags |=
3147                                         (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
3148                                 io_request->RaidContext.raid_context_g35.nseg_type |=
3149                                         (1 << RAID_CONTEXT_NSEG_SHIFT);
3150                                 io_request->RaidContext.raid_context_g35.nseg_type |=
3151                                         (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
3152                         } else {
3153                                 pRAID_Context->type = MPI2_TYPE_CUDA;
3154                                 pRAID_Context->nseg = 0x1;
3155                                 pRAID_Context->reg_lock_flags |=
3156                                         (MR_RL_FLAGS_SEQ_NUM_ENABLE |
3157                                          MR_RL_FLAGS_GRANT_DESTINATION_CUDA);
3158                         }
3159                 } else {
3160                         pRAID_Context->virtual_disk_tgt_id =
3161                                 cpu_to_le16(device_id +
3162                                 (MAX_PHYSICAL_DEVICES - 1));
3163                         pRAID_Context->config_seq_num = 0;
3164                         io_request->DevHandle = cpu_to_le16(0xFFFF);
3165                 }
3166         } else {
3167                 pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3168                 pRAID_Context->config_seq_num = 0;
3169
3170                 if (fusion->fast_path_io) {
3171                         local_map_ptr =
3172                                 fusion->ld_drv_map[(instance->map_id & 1)];
3173                         io_request->DevHandle =
3174                                 local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
3175                 } else {
3176                         io_request->DevHandle = cpu_to_le16(0xFFFF);
3177                 }
3178         }
3179
3180         cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
3181
3182         megasas_get_msix_index(instance, scmd, cmd, 1);
3183
3184         if (!fp_possible) {
3185                 /* system pd firmware path */
3186                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
3187                 cmd->request_desc->SCSIIO.RequestFlags =
3188                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3189                                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3190                 pRAID_Context->timeout_value = cpu_to_le16(os_timeout_value);
3191                 pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3192         } else {
3193                 if (os_timeout_value)
3194                         os_timeout_value++;
3195
3196                 /* system pd Fast Path */
3197                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
3198                 timeout_limit = (scmd->device->type == TYPE_DISK) ?
3199                                 255 : 0xFFFF;
3200                 pRAID_Context->timeout_value =
3201                         cpu_to_le16((os_timeout_value > timeout_limit) ?
3202                         timeout_limit : os_timeout_value);
3203                 if (instance->adapter_type >= INVADER_SERIES)
3204                         io_request->IoFlags |=
3205                                 cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
3206
3207                 cmd->request_desc->SCSIIO.RequestFlags =
3208                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
3209                                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3210         }
3211 }
3212
3213 /**
3214  * megasas_build_io_fusion -    Prepares IOs to devices
3215  * @instance:           Adapter soft state
3216  * @scp:                SCSI command
3217  * @cmd:                Command to be prepared
3218  *
3219  * Invokes helper functions to prepare request frames
3220  * and sets flags appropriate for IO/Non-IO cmd
3221  */
3222 static int
3223 megasas_build_io_fusion(struct megasas_instance *instance,
3224                         struct scsi_cmnd *scp,
3225                         struct megasas_cmd_fusion *cmd)
3226 {
3227         int sge_count;
3228         u8  cmd_type;
3229         struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
3230         struct MR_PRIV_DEVICE *mr_device_priv_data;
3231         mr_device_priv_data = scp->device->hostdata;
3232
3233         /* Zero out some fields so they don't get reused */
3234         memset(io_request->LUN, 0x0, 8);
3235         io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
3236         io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
3237         io_request->EEDPFlags = 0;
3238         io_request->Control = 0;
3239         io_request->EEDPBlockSize = 0;
3240         io_request->ChainOffset = 0;
3241         io_request->RaidContext.raid_context.raid_flags = 0;
3242         io_request->RaidContext.raid_context.type = 0;
3243         io_request->RaidContext.raid_context.nseg = 0;
3244
3245         memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
3246         /*
3247          * Just the CDB length,rest of the Flags are zero
3248          * This will be modified for FP in build_ldio_fusion
3249          */
3250         io_request->IoFlags = cpu_to_le16(scp->cmd_len);
3251
3252         switch (cmd_type = megasas_cmd_type(scp)) {
3253         case READ_WRITE_LDIO:
3254                 megasas_build_ldio_fusion(instance, scp, cmd);
3255                 break;
3256         case NON_READ_WRITE_LDIO:
3257                 megasas_build_ld_nonrw_fusion(instance, scp, cmd);
3258                 break;
3259         case READ_WRITE_SYSPDIO:
3260                 megasas_build_syspd_fusion(instance, scp, cmd, true);
3261                 break;
3262         case NON_READ_WRITE_SYSPDIO:
3263                 if (instance->secure_jbod_support ||
3264                     mr_device_priv_data->is_tm_capable)
3265                         megasas_build_syspd_fusion(instance, scp, cmd, false);
3266                 else
3267                         megasas_build_syspd_fusion(instance, scp, cmd, true);
3268                 break;
3269         default:
3270                 break;
3271         }
3272
3273         /*
3274          * Construct SGL
3275          */
3276
3277         sge_count = megasas_make_sgl(instance, scp, cmd);
3278
3279         if (sge_count > instance->max_num_sge || (sge_count < 0)) {
3280                 dev_err(&instance->pdev->dev,
3281                         "%s %d sge_count (%d) is out of range. Range is:  0-%d\n",
3282                         __func__, __LINE__, sge_count, instance->max_num_sge);
3283                 return 1;
3284         }
3285
3286         if (instance->adapter_type >= VENTURA_SERIES) {
3287                 set_num_sge(&io_request->RaidContext.raid_context_g35, sge_count);
3288                 cpu_to_le16s(&io_request->RaidContext.raid_context_g35.routing_flags);
3289                 cpu_to_le16s(&io_request->RaidContext.raid_context_g35.nseg_type);
3290         } else {
3291                 /* numSGE store lower 8 bit of sge_count.
3292                  * numSGEExt store higher 8 bit of sge_count
3293                  */
3294                 io_request->RaidContext.raid_context.num_sge = sge_count;
3295                 io_request->RaidContext.raid_context.num_sge_ext =
3296                         (u8)(sge_count >> 8);
3297         }
3298
3299         io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING);
3300
3301         if (scp->sc_data_direction == DMA_TO_DEVICE)
3302                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE);
3303         else if (scp->sc_data_direction == DMA_FROM_DEVICE)
3304                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ);
3305
3306         io_request->SGLOffset0 =
3307                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
3308
3309         io_request->SenseBufferLowAddress =
3310                 cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));
3311         io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
3312
3313         cmd->scmd = scp;
3314         scp->SCp.ptr = (char *)cmd;
3315
3316         return 0;
3317 }
3318
3319 static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
3320 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
3321 {
3322         u8 *p;
3323         struct fusion_context *fusion;
3324
3325         fusion = instance->ctrl_context;
3326         p = fusion->req_frames_desc +
3327                 sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) * index;
3328
3329         return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
3330 }
3331
3332
3333 /* megasas_prepate_secondRaid1_IO
3334  *  It prepares the raid 1 second IO
3335  */
3336 static void megasas_prepare_secondRaid1_IO(struct megasas_instance *instance,
3337                                            struct megasas_cmd_fusion *cmd,
3338                                            struct megasas_cmd_fusion *r1_cmd)
3339 {
3340         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc, *req_desc2 = NULL;
3341         struct fusion_context *fusion;
3342         fusion = instance->ctrl_context;
3343         req_desc = cmd->request_desc;
3344         /* copy the io request frame as well as 8 SGEs data for r1 command*/
3345         memcpy(r1_cmd->io_request, cmd->io_request,
3346                (sizeof(struct MPI2_RAID_SCSI_IO_REQUEST)));
3347         memcpy(&r1_cmd->io_request->SGL, &cmd->io_request->SGL,
3348                (fusion->max_sge_in_main_msg * sizeof(union MPI2_SGE_IO_UNION)));
3349         /*sense buffer is different for r1 command*/
3350         r1_cmd->io_request->SenseBufferLowAddress =
3351                         cpu_to_le32(lower_32_bits(r1_cmd->sense_phys_addr));
3352         r1_cmd->scmd = cmd->scmd;
3353         req_desc2 = megasas_get_request_descriptor(instance,
3354                                                    (r1_cmd->index - 1));
3355         req_desc2->Words = 0;
3356         r1_cmd->request_desc = req_desc2;
3357         req_desc2->SCSIIO.SMID = cpu_to_le16(r1_cmd->index);
3358         req_desc2->SCSIIO.RequestFlags = req_desc->SCSIIO.RequestFlags;
3359         r1_cmd->request_desc->SCSIIO.DevHandle = cmd->r1_alt_dev_handle;
3360         r1_cmd->io_request->DevHandle = cmd->r1_alt_dev_handle;
3361         r1_cmd->r1_alt_dev_handle = cmd->io_request->DevHandle;
3362         cmd->io_request->RaidContext.raid_context_g35.flow_specific.peer_smid =
3363                         cpu_to_le16(r1_cmd->index);
3364         r1_cmd->io_request->RaidContext.raid_context_g35.flow_specific.peer_smid =
3365                         cpu_to_le16(cmd->index);
3366         /*MSIxIndex of both commands request descriptors should be same*/
3367         r1_cmd->request_desc->SCSIIO.MSIxIndex =
3368                         cmd->request_desc->SCSIIO.MSIxIndex;
3369         /*span arm is different for r1 cmd*/
3370         r1_cmd->io_request->RaidContext.raid_context_g35.span_arm =
3371                         cmd->io_request->RaidContext.raid_context_g35.span_arm + 1;
3372 }
3373
3374 /**
3375  * megasas_build_and_issue_cmd_fusion -Main routine for building and
3376  *                                     issuing non IOCTL cmd
3377  * @instance:                   Adapter soft state
3378  * @scmd:                       pointer to scsi cmd from OS
3379  */
3380 static u32
3381 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
3382                                    struct scsi_cmnd *scmd)
3383 {
3384         struct megasas_cmd_fusion *cmd, *r1_cmd = NULL;
3385         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
3386         u32 index;
3387
3388         if ((megasas_cmd_type(scmd) == READ_WRITE_LDIO) &&
3389                 instance->ldio_threshold &&
3390                 (atomic_inc_return(&instance->ldio_outstanding) >
3391                 instance->ldio_threshold)) {
3392                 atomic_dec(&instance->ldio_outstanding);
3393                 return SCSI_MLQUEUE_DEVICE_BUSY;
3394         }
3395
3396         if (atomic_inc_return(&instance->fw_outstanding) >
3397                         instance->host->can_queue) {
3398                 atomic_dec(&instance->fw_outstanding);
3399                 return SCSI_MLQUEUE_HOST_BUSY;
3400         }
3401
3402         cmd = megasas_get_cmd_fusion(instance, scmd->request->tag);
3403
3404         if (!cmd) {
3405                 atomic_dec(&instance->fw_outstanding);
3406                 return SCSI_MLQUEUE_HOST_BUSY;
3407         }
3408
3409         index = cmd->index;
3410
3411         req_desc = megasas_get_request_descriptor(instance, index-1);
3412
3413         req_desc->Words = 0;
3414         cmd->request_desc = req_desc;
3415
3416         if (megasas_build_io_fusion(instance, scmd, cmd)) {
3417                 megasas_return_cmd_fusion(instance, cmd);
3418                 dev_err(&instance->pdev->dev, "Error building command\n");
3419                 cmd->request_desc = NULL;
3420                 atomic_dec(&instance->fw_outstanding);
3421                 return SCSI_MLQUEUE_HOST_BUSY;
3422         }
3423
3424         req_desc = cmd->request_desc;
3425         req_desc->SCSIIO.SMID = cpu_to_le16(index);
3426
3427         if (cmd->io_request->ChainOffset != 0 &&
3428             cmd->io_request->ChainOffset != 0xF)
3429                 dev_err(&instance->pdev->dev, "The chain offset value is not "
3430                        "correct : %x\n", cmd->io_request->ChainOffset);
3431         /*
3432          *      if it is raid 1/10 fp write capable.
3433          *      try to get second command from pool and construct it.
3434          *      From FW, it has confirmed that lba values of two PDs
3435          *      corresponds to single R1/10 LD are always same
3436          *
3437          */
3438         /*      driver side count always should be less than max_fw_cmds
3439          *      to get new command
3440          */
3441         if (cmd->r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
3442                 r1_cmd = megasas_get_cmd_fusion(instance,
3443                                 (scmd->request->tag + instance->max_fw_cmds));
3444                 megasas_prepare_secondRaid1_IO(instance, cmd, r1_cmd);
3445         }
3446
3447
3448         /*
3449          * Issue the command to the FW
3450          */
3451
3452         megasas_fire_cmd_fusion(instance, req_desc);
3453
3454         if (r1_cmd)
3455                 megasas_fire_cmd_fusion(instance, r1_cmd->request_desc);
3456
3457
3458         return 0;
3459 }
3460
3461 /**
3462  * megasas_complete_r1_command -
3463  * completes R1 FP write commands which has valid peer smid
3464  * @instance:                   Adapter soft state
3465  * @cmd_fusion:                 MPT command frame
3466  *
3467  */
3468 static inline void
3469 megasas_complete_r1_command(struct megasas_instance *instance,
3470                             struct megasas_cmd_fusion *cmd)
3471 {
3472         u8 *sense, status, ex_status;
3473         u32 data_length;
3474         u16 peer_smid;
3475         struct fusion_context *fusion;
3476         struct megasas_cmd_fusion *r1_cmd = NULL;
3477         struct scsi_cmnd *scmd_local = NULL;
3478         struct RAID_CONTEXT_G35 *rctx_g35;
3479
3480         rctx_g35 = &cmd->io_request->RaidContext.raid_context_g35;
3481         fusion = instance->ctrl_context;
3482         peer_smid = le16_to_cpu(rctx_g35->flow_specific.peer_smid);
3483
3484         r1_cmd = fusion->cmd_list[peer_smid - 1];
3485         scmd_local = cmd->scmd;
3486         status = rctx_g35->status;
3487         ex_status = rctx_g35->ex_status;
3488         data_length = cmd->io_request->DataLength;
3489         sense = cmd->sense;
3490
3491         cmd->cmd_completed = true;
3492
3493         /* Check if peer command is completed or not*/
3494         if (r1_cmd->cmd_completed) {
3495                 rctx_g35 = &r1_cmd->io_request->RaidContext.raid_context_g35;
3496                 if (rctx_g35->status != MFI_STAT_OK) {
3497                         status = rctx_g35->status;
3498                         ex_status = rctx_g35->ex_status;
3499                         data_length = r1_cmd->io_request->DataLength;
3500                         sense = r1_cmd->sense;
3501                 }
3502
3503                 megasas_return_cmd_fusion(instance, r1_cmd);
3504                 map_cmd_status(fusion, scmd_local, status, ex_status,
3505                                le32_to_cpu(data_length), sense);
3506                 if (instance->ldio_threshold &&
3507                     megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
3508                         atomic_dec(&instance->ldio_outstanding);
3509                 scmd_local->SCp.ptr = NULL;
3510                 megasas_return_cmd_fusion(instance, cmd);
3511                 scsi_dma_unmap(scmd_local);
3512                 scmd_local->scsi_done(scmd_local);
3513         }
3514 }
3515
3516 /**
3517  * complete_cmd_fusion -        Completes command
3518  * @instance:                   Adapter soft state
3519  * Completes all commands that is in reply descriptor queue
3520  */
3521 static int
3522 complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
3523                     struct megasas_irq_context *irq_context)
3524 {
3525         union MPI2_REPLY_DESCRIPTORS_UNION *desc;
3526         struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
3527         struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
3528         struct fusion_context *fusion;
3529         struct megasas_cmd *cmd_mfi;
3530         struct megasas_cmd_fusion *cmd_fusion;
3531         u16 smid, num_completed;
3532         u8 reply_descript_type, *sense, status, extStatus;
3533         u32 device_id, data_length;
3534         union desc_value d_val;
3535         struct LD_LOAD_BALANCE_INFO *lbinfo;
3536         int threshold_reply_count = 0;
3537         struct scsi_cmnd *scmd_local = NULL;
3538         struct MR_TASK_MANAGE_REQUEST *mr_tm_req;
3539         struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_tm_req;
3540
3541         fusion = instance->ctrl_context;
3542
3543         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
3544                 return IRQ_HANDLED;
3545
3546         desc = fusion->reply_frames_desc[MSIxIndex] +
3547                                 fusion->last_reply_idx[MSIxIndex];
3548
3549         reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
3550
3551         d_val.word = desc->Words;
3552
3553         reply_descript_type = reply_desc->ReplyFlags &
3554                 MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
3555
3556         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
3557                 return IRQ_NONE;
3558
3559         num_completed = 0;
3560
3561         while (d_val.u.low != cpu_to_le32(UINT_MAX) &&
3562                d_val.u.high != cpu_to_le32(UINT_MAX)) {
3563
3564                 smid = le16_to_cpu(reply_desc->SMID);
3565                 cmd_fusion = fusion->cmd_list[smid - 1];
3566                 scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *)
3567                                                 cmd_fusion->io_request;
3568
3569                 scmd_local = cmd_fusion->scmd;
3570                 status = scsi_io_req->RaidContext.raid_context.status;
3571                 extStatus = scsi_io_req->RaidContext.raid_context.ex_status;
3572                 sense = cmd_fusion->sense;
3573                 data_length = scsi_io_req->DataLength;
3574
3575                 switch (scsi_io_req->Function) {
3576                 case MPI2_FUNCTION_SCSI_TASK_MGMT:
3577                         mr_tm_req = (struct MR_TASK_MANAGE_REQUEST *)
3578                                                 cmd_fusion->io_request;
3579                         mpi_tm_req = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *)
3580                                                 &mr_tm_req->TmRequest;
3581                         dev_dbg(&instance->pdev->dev, "TM completion:"
3582                                 "type: 0x%x TaskMID: 0x%x\n",
3583                                 mpi_tm_req->TaskType, mpi_tm_req->TaskMID);
3584                         complete(&cmd_fusion->done);
3585                         break;
3586                 case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
3587                         /* Update load balancing info */
3588                         if (fusion->load_balance_info &&
3589                             (cmd_fusion->scmd->SCp.Status &
3590                             MEGASAS_LOAD_BALANCE_FLAG)) {
3591                                 device_id = MEGASAS_DEV_INDEX(scmd_local);
3592                                 lbinfo = &fusion->load_balance_info[device_id];
3593                                 atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]);
3594                                 cmd_fusion->scmd->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
3595                         }
3596                         /* Fall through - and complete IO */
3597                 case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
3598                         atomic_dec(&instance->fw_outstanding);
3599                         if (cmd_fusion->r1_alt_dev_handle == MR_DEVHANDLE_INVALID) {
3600                                 map_cmd_status(fusion, scmd_local, status,
3601                                                extStatus, le32_to_cpu(data_length),
3602                                                sense);
3603                                 if (instance->ldio_threshold &&
3604                                     (megasas_cmd_type(scmd_local) == READ_WRITE_LDIO))
3605                                         atomic_dec(&instance->ldio_outstanding);
3606                                 scmd_local->SCp.ptr = NULL;
3607                                 megasas_return_cmd_fusion(instance, cmd_fusion);
3608                                 scsi_dma_unmap(scmd_local);
3609                                 scmd_local->scsi_done(scmd_local);
3610                         } else  /* Optimal VD - R1 FP command completion. */
3611                                 megasas_complete_r1_command(instance, cmd_fusion);
3612                         break;
3613                 case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
3614                         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
3615                         /* Poll mode. Dummy free.
3616                          * In case of Interrupt mode, caller has reverse check.
3617                          */
3618                         if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) {
3619                                 cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE;
3620                                 megasas_return_cmd(instance, cmd_mfi);
3621                         } else
3622                                 megasas_complete_cmd(instance, cmd_mfi, DID_OK);
3623                         break;
3624                 }
3625
3626                 fusion->last_reply_idx[MSIxIndex]++;
3627                 if (fusion->last_reply_idx[MSIxIndex] >=
3628                     fusion->reply_q_depth)
3629                         fusion->last_reply_idx[MSIxIndex] = 0;
3630
3631                 desc->Words = cpu_to_le64(ULLONG_MAX);
3632                 num_completed++;
3633                 threshold_reply_count++;
3634
3635                 /* Get the next reply descriptor */
3636                 if (!fusion->last_reply_idx[MSIxIndex])
3637                         desc = fusion->reply_frames_desc[MSIxIndex];
3638                 else
3639                         desc++;
3640
3641                 reply_desc =
3642                   (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
3643
3644                 d_val.word = desc->Words;
3645
3646                 reply_descript_type = reply_desc->ReplyFlags &
3647                         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
3648
3649                 if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
3650                         break;
3651                 /*
3652                  * Write to reply post host index register after completing threshold
3653                  * number of reply counts and still there are more replies in reply queue
3654                  * pending to be completed
3655                  */
3656                 if (threshold_reply_count >= instance->threshold_reply_count) {
3657                         if (instance->msix_combined)
3658                                 writel(((MSIxIndex & 0x7) << 24) |
3659                                         fusion->last_reply_idx[MSIxIndex],
3660                                         instance->reply_post_host_index_addr[MSIxIndex/8]);
3661                         else
3662                                 writel((MSIxIndex << 24) |
3663                                         fusion->last_reply_idx[MSIxIndex],
3664                                         instance->reply_post_host_index_addr[0]);
3665                         threshold_reply_count = 0;
3666                         if (irq_context) {
3667                                 if (!irq_context->irq_poll_scheduled) {
3668                                         irq_context->irq_poll_scheduled = true;
3669                                         irq_context->irq_line_enable = true;
3670                                         irq_poll_sched(&irq_context->irqpoll);
3671                                 }
3672                                 return num_completed;
3673                         }
3674                 }
3675         }
3676
3677         if (num_completed) {
3678                 wmb();
3679                 if (instance->msix_combined)
3680                         writel(((MSIxIndex & 0x7) << 24) |
3681                                 fusion->last_reply_idx[MSIxIndex],
3682                                 instance->reply_post_host_index_addr[MSIxIndex/8]);
3683                 else
3684                         writel((MSIxIndex << 24) |
3685                                 fusion->last_reply_idx[MSIxIndex],
3686                                 instance->reply_post_host_index_addr[0]);
3687                 megasas_check_and_restore_queue_depth(instance);
3688         }
3689         return num_completed;
3690 }
3691
3692 /**
3693  * megasas_enable_irq_poll() - enable irqpoll
3694  */
3695 static void megasas_enable_irq_poll(struct megasas_instance *instance)
3696 {
3697         u32 count, i;
3698         struct megasas_irq_context *irq_ctx;
3699
3700         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3701
3702         for (i = 0; i < count; i++) {
3703                 irq_ctx = &instance->irq_context[i];
3704                 irq_poll_enable(&irq_ctx->irqpoll);
3705         }
3706 }
3707
3708 /**
3709  * megasas_sync_irqs -  Synchronizes all IRQs owned by adapter
3710  * @instance:                   Adapter soft state
3711  */
3712 static void megasas_sync_irqs(unsigned long instance_addr)
3713 {
3714         u32 count, i;
3715         struct megasas_instance *instance =
3716                 (struct megasas_instance *)instance_addr;
3717         struct megasas_irq_context *irq_ctx;
3718
3719         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3720
3721         for (i = 0; i < count; i++) {
3722                 synchronize_irq(pci_irq_vector(instance->pdev, i));
3723                 irq_ctx = &instance->irq_context[i];
3724                 irq_poll_disable(&irq_ctx->irqpoll);
3725                 if (irq_ctx->irq_poll_scheduled) {
3726                         irq_ctx->irq_poll_scheduled = false;
3727                         enable_irq(irq_ctx->os_irq);
3728                 }
3729         }
3730 }
3731
3732 /**
3733  * megasas_irqpoll() - process a queue for completed reply descriptors
3734  * @irqpoll:    IRQ poll structure associated with queue to poll.
3735  * @budget:     Threshold of reply descriptors to process per poll.
3736  *
3737  * Return: The number of entries processed.
3738  */
3739
3740 int megasas_irqpoll(struct irq_poll *irqpoll, int budget)
3741 {
3742         struct megasas_irq_context *irq_ctx;
3743         struct megasas_instance *instance;
3744         int num_entries;
3745
3746         irq_ctx = container_of(irqpoll, struct megasas_irq_context, irqpoll);
3747         instance = irq_ctx->instance;
3748
3749         if (irq_ctx->irq_line_enable) {
3750                 disable_irq(irq_ctx->os_irq);
3751                 irq_ctx->irq_line_enable = false;
3752         }
3753
3754         num_entries = complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx);
3755         if (num_entries < budget) {
3756                 irq_poll_complete(irqpoll);
3757                 irq_ctx->irq_poll_scheduled = false;
3758                 enable_irq(irq_ctx->os_irq);
3759         }
3760
3761         return num_entries;
3762 }
3763
3764 /**
3765  * megasas_complete_cmd_dpc_fusion -    Completes command
3766  * @instance:                   Adapter soft state
3767  *
3768  * Tasklet to complete cmds
3769  */
3770 static void
3771 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
3772 {
3773         struct megasas_instance *instance =
3774                 (struct megasas_instance *)instance_addr;
3775         u32 count, MSIxIndex;
3776
3777         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3778
3779         /* If we have already declared adapter dead, donot complete cmds */
3780         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
3781                 return;
3782
3783         for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
3784                 complete_cmd_fusion(instance, MSIxIndex, NULL);
3785 }
3786
3787 /**
3788  * megasas_isr_fusion - isr entry point
3789  */
3790 static irqreturn_t megasas_isr_fusion(int irq, void *devp)
3791 {
3792         struct megasas_irq_context *irq_context = devp;
3793         struct megasas_instance *instance = irq_context->instance;
3794         u32 mfiStatus;
3795
3796         if (instance->mask_interrupts)
3797                 return IRQ_NONE;
3798
3799 #if defined(ENABLE_IRQ_POLL)
3800         if (irq_context->irq_poll_scheduled)
3801                 return IRQ_HANDLED;
3802 #endif
3803
3804         if (!instance->msix_vectors) {
3805                 mfiStatus = instance->instancet->clear_intr(instance);
3806                 if (!mfiStatus)
3807                         return IRQ_NONE;
3808         }
3809
3810         /* If we are resetting, bail */
3811         if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
3812                 instance->instancet->clear_intr(instance);
3813                 return IRQ_HANDLED;
3814         }
3815
3816         return complete_cmd_fusion(instance, irq_context->MSIxIndex, irq_context)
3817                         ? IRQ_HANDLED : IRQ_NONE;
3818 }
3819
3820 /**
3821  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
3822  * @instance:                   Adapter soft state
3823  * mfi_cmd:                     megasas_cmd pointer
3824  *
3825  */
3826 static void
3827 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
3828                         struct megasas_cmd *mfi_cmd)
3829 {
3830         struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
3831         struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
3832         struct megasas_cmd_fusion *cmd;
3833         struct fusion_context *fusion;
3834         struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
3835
3836         fusion = instance->ctrl_context;
3837
3838         cmd = megasas_get_cmd_fusion(instance,
3839                         instance->max_scsi_cmds + mfi_cmd->index);
3840
3841         /*  Save the smid. To be used for returning the cmd */
3842         mfi_cmd->context.smid = cmd->index;
3843
3844         /*
3845          * For cmds where the flag is set, store the flag and check
3846          * on completion. For cmds with this flag, don't call
3847          * megasas_complete_cmd
3848          */
3849
3850         if (frame_hdr->flags & cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE))
3851                 mfi_cmd->flags |= DRV_DCMD_POLLED_MODE;
3852
3853         io_req = cmd->io_request;
3854
3855         if (instance->adapter_type >= INVADER_SERIES) {
3856                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
3857                         (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
3858                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
3859                 sgl_ptr_end->Flags = 0;
3860         }
3861
3862         mpi25_ieee_chain =
3863           (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
3864
3865         io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
3866         io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
3867                                        SGL) / 4;
3868         io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
3869
3870         mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr);
3871
3872         mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
3873                 MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
3874
3875         mpi25_ieee_chain->Length = cpu_to_le32(instance->mfi_frame_size);
3876 }
3877
3878 /**
3879  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
3880  * @instance:                   Adapter soft state
3881  * @cmd:                        mfi cmd to build
3882  *
3883  */
3884 static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
3885 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
3886 {
3887         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc = NULL;
3888         u16 index;
3889
3890         build_mpt_mfi_pass_thru(instance, cmd);
3891         index = cmd->context.smid;
3892
3893         req_desc = megasas_get_request_descriptor(instance, index - 1);
3894
3895         req_desc->Words = 0;
3896         req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3897                                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3898
3899         req_desc->SCSIIO.SMID = cpu_to_le16(index);
3900
3901         return req_desc;
3902 }
3903
3904 /**
3905  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
3906  * @instance:                   Adapter soft state
3907  * @cmd:                        mfi cmd pointer
3908  *
3909  */
3910 static void
3911 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
3912                           struct megasas_cmd *cmd)
3913 {
3914         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
3915
3916         req_desc = build_mpt_cmd(instance, cmd);
3917
3918         megasas_fire_cmd_fusion(instance, req_desc);
3919         return;
3920 }
3921
3922 /**
3923  * megasas_release_fusion -     Reverses the FW initialization
3924  * @instance:                   Adapter soft state
3925  */
3926 void
3927 megasas_release_fusion(struct megasas_instance *instance)
3928 {
3929         megasas_free_ioc_init_cmd(instance);
3930         megasas_free_cmds(instance);
3931         megasas_free_cmds_fusion(instance);
3932
3933         iounmap(instance->reg_set);
3934
3935         pci_release_selected_regions(instance->pdev, 1<<instance->bar);
3936 }
3937
3938 /**
3939  * megasas_read_fw_status_reg_fusion - returns the current FW status value
3940  * @regs:                       MFI register set
3941  */
3942 static u32
3943 megasas_read_fw_status_reg_fusion(struct megasas_instance *instance)
3944 {
3945         return megasas_readl(instance, &instance->reg_set->outbound_scratch_pad_0);
3946 }
3947
3948 /**
3949  * megasas_alloc_host_crash_buffer -    Host buffers for Crash dump collection from Firmware
3950  * @instance:                           Controller's soft instance
3951  * return:                              Number of allocated host crash buffers
3952  */
3953 static void
3954 megasas_alloc_host_crash_buffer(struct megasas_instance *instance)
3955 {
3956         unsigned int i;
3957
3958         for (i = 0; i < MAX_CRASH_DUMP_SIZE; i++) {
3959                 instance->crash_buf[i] = vzalloc(CRASH_DMA_BUF_SIZE);
3960                 if (!instance->crash_buf[i]) {
3961                         dev_info(&instance->pdev->dev, "Firmware crash dump "
3962                                 "memory allocation failed at index %d\n", i);
3963                         break;
3964                 }
3965         }
3966         instance->drv_buf_alloc = i;
3967 }
3968
3969 /**
3970  * megasas_free_host_crash_buffer -     Host buffers for Crash dump collection from Firmware
3971  * @instance:                           Controller's soft instance
3972  */
3973 void
3974 megasas_free_host_crash_buffer(struct megasas_instance *instance)
3975 {
3976         unsigned int i;
3977         for (i = 0; i < instance->drv_buf_alloc; i++) {
3978                 if (instance->crash_buf[i])
3979                         vfree(instance->crash_buf[i]);
3980         }
3981         instance->drv_buf_index = 0;
3982         instance->drv_buf_alloc = 0;
3983         instance->fw_crash_state = UNAVAILABLE;
3984         instance->fw_crash_buffer_size = 0;
3985 }
3986
3987 /**
3988  * megasas_adp_reset_fusion -   For controller reset
3989  * @regs:                               MFI register set
3990  */
3991 static int
3992 megasas_adp_reset_fusion(struct megasas_instance *instance,
3993                          struct megasas_register_set __iomem *regs)
3994 {
3995         u32 host_diag, abs_state, retry;
3996
3997         /* Now try to reset the chip */
3998         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3999         writel(MPI2_WRSEQ_1ST_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4000         writel(MPI2_WRSEQ_2ND_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4001         writel(MPI2_WRSEQ_3RD_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4002         writel(MPI2_WRSEQ_4TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4003         writel(MPI2_WRSEQ_5TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4004         writel(MPI2_WRSEQ_6TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4005
4006         /* Check that the diag write enable (DRWE) bit is on */
4007         host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag);
4008         retry = 0;
4009         while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
4010                 msleep(100);
4011                 host_diag = megasas_readl(instance,
4012                                           &instance->reg_set->fusion_host_diag);
4013                 if (retry++ == 100) {
4014                         dev_warn(&instance->pdev->dev,
4015                                 "Host diag unlock failed from %s %d\n",
4016                                 __func__, __LINE__);
4017                         break;
4018                 }
4019         }
4020         if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
4021                 return -1;
4022
4023         /* Send chip reset command */
4024         writel(host_diag | HOST_DIAG_RESET_ADAPTER,
4025                 &instance->reg_set->fusion_host_diag);
4026         msleep(3000);
4027
4028         /* Make sure reset adapter bit is cleared */
4029         host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag);
4030         retry = 0;
4031         while (host_diag & HOST_DIAG_RESET_ADAPTER) {
4032                 msleep(100);
4033                 host_diag = megasas_readl(instance,
4034                                           &instance->reg_set->fusion_host_diag);
4035                 if (retry++ == 1000) {
4036                         dev_warn(&instance->pdev->dev,
4037                                 "Diag reset adapter never cleared %s %d\n",
4038                                 __func__, __LINE__);
4039                         break;
4040                 }
4041         }
4042         if (host_diag & HOST_DIAG_RESET_ADAPTER)
4043                 return -1;
4044
4045         abs_state = instance->instancet->read_fw_status_reg(instance)
4046                         & MFI_STATE_MASK;
4047         retry = 0;
4048
4049         while ((abs_state <= MFI_STATE_FW_INIT) && (retry++ < 1000)) {
4050                 msleep(100);
4051                 abs_state = instance->instancet->
4052                         read_fw_status_reg(instance) & MFI_STATE_MASK;
4053         }
4054         if (abs_state <= MFI_STATE_FW_INIT) {
4055                 dev_warn(&instance->pdev->dev,
4056                         "fw state < MFI_STATE_FW_INIT, state = 0x%x %s %d\n",
4057                         abs_state, __func__, __LINE__);
4058                 return -1;
4059         }
4060
4061         return 0;
4062 }
4063
4064 /**
4065  * megasas_check_reset_fusion - For controller reset check
4066  * @regs:                               MFI register set
4067  */
4068 static int
4069 megasas_check_reset_fusion(struct megasas_instance *instance,
4070                            struct megasas_register_set __iomem *regs)
4071 {
4072         return 0;
4073 }
4074
4075 /**
4076  * megasas_trigger_snap_dump -  Trigger snap dump in FW
4077  * @instance:                   Soft instance of adapter
4078  */
4079 static inline void megasas_trigger_snap_dump(struct megasas_instance *instance)
4080 {
4081         int j;
4082         u32 fw_state, abs_state;
4083
4084         if (!instance->disableOnlineCtrlReset) {
4085                 dev_info(&instance->pdev->dev, "Trigger snap dump\n");
4086                 writel(MFI_ADP_TRIGGER_SNAP_DUMP,
4087                        &instance->reg_set->doorbell);
4088                 readl(&instance->reg_set->doorbell);
4089         }
4090
4091         for (j = 0; j < instance->snapdump_wait_time; j++) {
4092                 abs_state = instance->instancet->read_fw_status_reg(instance);
4093                 fw_state = abs_state & MFI_STATE_MASK;
4094                 if (fw_state == MFI_STATE_FAULT) {
4095                         dev_printk(KERN_ERR, &instance->pdev->dev,
4096                                    "FW in FAULT state Fault code:0x%x subcode:0x%x func:%s\n",
4097                                    abs_state & MFI_STATE_FAULT_CODE,
4098                                    abs_state & MFI_STATE_FAULT_SUBCODE, __func__);
4099                         return;
4100                 }
4101                 msleep(1000);
4102         }
4103 }
4104
4105 /* This function waits for outstanding commands on fusion to complete */
4106 static int
4107 megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
4108                                     int reason, int *convert)
4109 {
4110         int i, outstanding, retval = 0, hb_seconds_missed = 0;
4111         u32 fw_state, abs_state;
4112         u32 waittime_for_io_completion;
4113
4114         waittime_for_io_completion =
4115                 min_t(u32, resetwaittime,
4116                         (resetwaittime - instance->snapdump_wait_time));
4117
4118         if (reason == MFI_IO_TIMEOUT_OCR) {
4119                 dev_info(&instance->pdev->dev,
4120                         "MFI command is timed out\n");
4121                 megasas_complete_cmd_dpc_fusion((unsigned long)instance);
4122                 if (instance->snapdump_wait_time)
4123                         megasas_trigger_snap_dump(instance);
4124                 retval = 1;
4125                 goto out;
4126         }
4127
4128         for (i = 0; i < waittime_for_io_completion; i++) {
4129                 /* Check if firmware is in fault state */
4130                 abs_state = instance->instancet->read_fw_status_reg(instance);
4131                 fw_state = abs_state & MFI_STATE_MASK;
4132                 if (fw_state == MFI_STATE_FAULT) {
4133                         dev_printk(KERN_ERR, &instance->pdev->dev,
4134                                    "FW in FAULT state Fault code:0x%x subcode:0x%x func:%s\n",
4135                                    abs_state & MFI_STATE_FAULT_CODE,
4136                                    abs_state & MFI_STATE_FAULT_SUBCODE, __func__);
4137                         megasas_complete_cmd_dpc_fusion((unsigned long)instance);
4138                         if (instance->requestorId && reason) {
4139                                 dev_warn(&instance->pdev->dev, "SR-IOV Found FW in FAULT"
4140                                 " state while polling during"
4141                                 " I/O timeout handling for %d\n",
4142                                 instance->host->host_no);
4143                                 *convert = 1;
4144                         }
4145
4146                         retval = 1;
4147                         goto out;
4148                 }
4149
4150
4151                 /* If SR-IOV VF mode & heartbeat timeout, don't wait */
4152                 if (instance->requestorId && !reason) {
4153                         retval = 1;
4154                         goto out;
4155                 }
4156
4157                 /* If SR-IOV VF mode & I/O timeout, check for HB timeout */
4158                 if (instance->requestorId && (reason == SCSIIO_TIMEOUT_OCR)) {
4159                         if (instance->hb_host_mem->HB.fwCounter !=
4160                             instance->hb_host_mem->HB.driverCounter) {
4161                                 instance->hb_host_mem->HB.driverCounter =
4162                                         instance->hb_host_mem->HB.fwCounter;
4163                                 hb_seconds_missed = 0;
4164                         } else {
4165                                 hb_seconds_missed++;
4166                                 if (hb_seconds_missed ==
4167                                     (MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF/HZ)) {
4168                                         dev_warn(&instance->pdev->dev, "SR-IOV:"
4169                                                " Heartbeat never completed "
4170                                                " while polling during I/O "
4171                                                " timeout handling for "
4172                                                "scsi%d.\n",
4173                                                instance->host->host_no);
4174                                                *convert = 1;
4175                                                retval = 1;
4176                                                goto out;
4177                                 }
4178                         }
4179                 }
4180
4181                 megasas_complete_cmd_dpc_fusion((unsigned long)instance);
4182                 outstanding = atomic_read(&instance->fw_outstanding);
4183                 if (!outstanding)
4184                         goto out;
4185
4186                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
4187                         dev_notice(&instance->pdev->dev, "[%2d]waiting for %d "
4188                                "commands to complete for scsi%d\n", i,
4189                                outstanding, instance->host->host_no);
4190                 }
4191                 msleep(1000);
4192         }
4193
4194         if (instance->snapdump_wait_time) {
4195                 megasas_trigger_snap_dump(instance);
4196                 retval = 1;
4197                 goto out;
4198         }
4199
4200         if (atomic_read(&instance->fw_outstanding)) {
4201                 dev_err(&instance->pdev->dev, "pending commands remain after waiting, "
4202                        "will reset adapter scsi%d.\n",
4203                        instance->host->host_no);
4204                 *convert = 1;
4205                 retval = 1;
4206         }
4207
4208 out:
4209         return retval;
4210 }
4211
4212 void  megasas_reset_reply_desc(struct megasas_instance *instance)
4213 {
4214         int i, j, count;
4215         struct fusion_context *fusion;
4216         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
4217
4218         fusion = instance->ctrl_context;
4219         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
4220         for (i = 0 ; i < count ; i++) {
4221                 fusion->last_reply_idx[i] = 0;
4222                 reply_desc = fusion->reply_frames_desc[i];
4223                 for (j = 0 ; j < fusion->reply_q_depth; j++, reply_desc++)
4224                         reply_desc->Words = cpu_to_le64(ULLONG_MAX);
4225         }
4226 }
4227
4228 /*
4229  * megasas_refire_mgmt_cmd :    Re-fire management commands
4230  * @instance:                           Controller's soft instance
4231 */
4232 void megasas_refire_mgmt_cmd(struct megasas_instance *instance,
4233                              bool return_ioctl)
4234 {
4235         int j;
4236         struct megasas_cmd_fusion *cmd_fusion;
4237         struct fusion_context *fusion;
4238         struct megasas_cmd *cmd_mfi;
4239         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
4240         u16 smid;
4241         bool refire_cmd = 0;
4242         u8 result;
4243         u32 opcode = 0;
4244
4245         fusion = instance->ctrl_context;
4246
4247         /* Re-fire management commands.
4248          * Do not traverse complet MPT frame pool. Start from max_scsi_cmds.
4249          */
4250         for (j = instance->max_scsi_cmds ; j < instance->max_fw_cmds; j++) {
4251                 cmd_fusion = fusion->cmd_list[j];
4252                 cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
4253                 smid = le16_to_cpu(cmd_mfi->context.smid);
4254                 result = REFIRE_CMD;
4255
4256                 if (!smid)
4257                         continue;
4258
4259                 req_desc = megasas_get_request_descriptor(instance, smid - 1);
4260
4261                 switch (cmd_mfi->frame->hdr.cmd) {
4262                 case MFI_CMD_DCMD:
4263                         opcode = le32_to_cpu(cmd_mfi->frame->dcmd.opcode);
4264                          /* Do not refire shutdown command */
4265                         if (opcode == MR_DCMD_CTRL_SHUTDOWN) {
4266                                 cmd_mfi->frame->dcmd.cmd_status = MFI_STAT_OK;
4267                                 result = COMPLETE_CMD;
4268                                 break;
4269                         }
4270
4271                         refire_cmd = ((opcode != MR_DCMD_LD_MAP_GET_INFO)) &&
4272                                       (opcode != MR_DCMD_SYSTEM_PD_MAP_GET_INFO) &&
4273                                       !(cmd_mfi->flags & DRV_DCMD_SKIP_REFIRE);
4274
4275                         if (!refire_cmd)
4276                                 result = RETURN_CMD;
4277
4278                         break;
4279                 case MFI_CMD_NVME:
4280                         if (!instance->support_nvme_passthru) {
4281                                 cmd_mfi->frame->hdr.cmd_status = MFI_STAT_INVALID_CMD;
4282                                 result = COMPLETE_CMD;
4283                         }
4284
4285                         break;
4286                 case MFI_CMD_TOOLBOX:
4287                         if (!instance->support_pci_lane_margining) {
4288                                 cmd_mfi->frame->hdr.cmd_status = MFI_STAT_INVALID_CMD;
4289                                 result = COMPLETE_CMD;
4290                         }
4291
4292                         break;
4293                 default:
4294                         break;
4295                 }
4296
4297                 if (return_ioctl && cmd_mfi->sync_cmd &&
4298                     cmd_mfi->frame->hdr.cmd != MFI_CMD_ABORT) {
4299                         dev_err(&instance->pdev->dev,
4300                                 "return -EBUSY from %s %d cmd 0x%x opcode 0x%x\n",
4301                                 __func__, __LINE__, cmd_mfi->frame->hdr.cmd,
4302                                 le32_to_cpu(cmd_mfi->frame->dcmd.opcode));
4303                         cmd_mfi->cmd_status_drv = DCMD_BUSY;
4304                         result = COMPLETE_CMD;
4305                 }
4306
4307                 switch (result) {
4308                 case REFIRE_CMD:
4309                         megasas_fire_cmd_fusion(instance, req_desc);
4310                         break;
4311                 case RETURN_CMD:
4312                         megasas_return_cmd(instance, cmd_mfi);
4313                         break;
4314                 case COMPLETE_CMD:
4315                         megasas_complete_cmd(instance, cmd_mfi, DID_OK);
4316                         break;
4317                 }
4318         }
4319 }
4320
4321 /*
4322  * megasas_return_polled_cmds: Return polled mode commands back to the pool
4323  *                             before initiating an OCR.
4324  * @instance:                  Controller's soft instance
4325  */
4326 static void
4327 megasas_return_polled_cmds(struct megasas_instance *instance)
4328 {
4329         int i;
4330         struct megasas_cmd_fusion *cmd_fusion;
4331         struct fusion_context *fusion;
4332         struct megasas_cmd *cmd_mfi;
4333
4334         fusion = instance->ctrl_context;
4335
4336         for (i = instance->max_scsi_cmds; i < instance->max_fw_cmds; i++) {
4337                 cmd_fusion = fusion->cmd_list[i];
4338                 cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
4339
4340                 if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) {
4341                         if (megasas_dbg_lvl & OCR_DEBUG)
4342                                 dev_info(&instance->pdev->dev,
4343                                          "%s %d return cmd 0x%x opcode 0x%x\n",
4344                                          __func__, __LINE__, cmd_mfi->frame->hdr.cmd,
4345                                          le32_to_cpu(cmd_mfi->frame->dcmd.opcode));
4346                         cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE;
4347                         megasas_return_cmd(instance, cmd_mfi);
4348                 }
4349         }
4350 }
4351
4352 /*
4353  * megasas_track_scsiio : Track SCSI IOs outstanding to a SCSI device
4354  * @instance: per adapter struct
4355  * @channel: the channel assigned by the OS
4356  * @id: the id assigned by the OS
4357  *
4358  * Returns SUCCESS if no IOs pending to SCSI device, else return FAILED
4359  */
4360
4361 static int megasas_track_scsiio(struct megasas_instance *instance,
4362                 int id, int channel)
4363 {
4364         int i, found = 0;
4365         struct megasas_cmd_fusion *cmd_fusion;
4366         struct fusion_context *fusion;
4367         fusion = instance->ctrl_context;
4368
4369         for (i = 0 ; i < instance->max_scsi_cmds; i++) {
4370                 cmd_fusion = fusion->cmd_list[i];
4371                 if (cmd_fusion->scmd &&
4372                         (cmd_fusion->scmd->device->id == id &&
4373                         cmd_fusion->scmd->device->channel == channel)) {
4374                         dev_info(&instance->pdev->dev,
4375                                 "SCSI commands pending to target"
4376                                 "channel %d id %d \tSMID: 0x%x\n",
4377                                 channel, id, cmd_fusion->index);
4378                         scsi_print_command(cmd_fusion->scmd);
4379                         found = 1;
4380                         break;
4381                 }
4382         }
4383
4384         return found ? FAILED : SUCCESS;
4385 }
4386
4387 /**
4388  * megasas_tm_response_code - translation of device response code
4389  * @ioc: per adapter object
4390  * @mpi_reply: MPI reply returned by firmware
4391  *
4392  * Return nothing.
4393  */
4394 static void
4395 megasas_tm_response_code(struct megasas_instance *instance,
4396                 struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply)
4397 {
4398         char *desc;
4399
4400         switch (mpi_reply->ResponseCode) {
4401         case MPI2_SCSITASKMGMT_RSP_TM_COMPLETE:
4402                 desc = "task management request completed";
4403                 break;
4404         case MPI2_SCSITASKMGMT_RSP_INVALID_FRAME:
4405                 desc = "invalid frame";
4406                 break;
4407         case MPI2_SCSITASKMGMT_RSP_TM_NOT_SUPPORTED:
4408                 desc = "task management request not supported";
4409                 break;
4410         case MPI2_SCSITASKMGMT_RSP_TM_FAILED:
4411                 desc = "task management request failed";
4412                 break;
4413         case MPI2_SCSITASKMGMT_RSP_TM_SUCCEEDED:
4414                 desc = "task management request succeeded";
4415                 break;
4416         case MPI2_SCSITASKMGMT_RSP_TM_INVALID_LUN:
4417                 desc = "invalid lun";
4418                 break;
4419         case 0xA:
4420                 desc = "overlapped tag attempted";
4421                 break;
4422         case MPI2_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC:
4423                 desc = "task queued, however not sent to target";
4424                 break;
4425         default:
4426                 desc = "unknown";
4427                 break;
4428         }
4429         dev_dbg(&instance->pdev->dev, "response_code(%01x): %s\n",
4430                 mpi_reply->ResponseCode, desc);
4431         dev_dbg(&instance->pdev->dev,
4432                 "TerminationCount/DevHandle/Function/TaskType/IOCStat/IOCLoginfo"
4433                 " 0x%x/0x%x/0x%x/0x%x/0x%x/0x%x\n",
4434                 mpi_reply->TerminationCount, mpi_reply->DevHandle,
4435                 mpi_reply->Function, mpi_reply->TaskType,
4436                 mpi_reply->IOCStatus, mpi_reply->IOCLogInfo);
4437 }
4438
4439 /**
4440  * megasas_issue_tm - main routine for sending tm requests
4441  * @instance: per adapter struct
4442  * @device_handle: device handle
4443  * @channel: the channel assigned by the OS
4444  * @id: the id assigned by the OS
4445  * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in megaraid_sas_fusion.c)
4446  * @smid_task: smid assigned to the task
4447  * @m_type: TM_MUTEX_ON or TM_MUTEX_OFF
4448  * Context: user
4449  *
4450  * MegaRaid use MPT interface for Task Magement request.
4451  * A generic API for sending task management requests to firmware.
4452  *
4453  * Return SUCCESS or FAILED.
4454  */
4455 static int
4456 megasas_issue_tm(struct megasas_instance *instance, u16 device_handle,
4457         uint channel, uint id, u16 smid_task, u8 type,
4458         struct MR_PRIV_DEVICE *mr_device_priv_data)
4459 {
4460         struct MR_TASK_MANAGE_REQUEST *mr_request;
4461         struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_request;
4462         unsigned long timeleft;
4463         struct megasas_cmd_fusion *cmd_fusion;
4464         struct megasas_cmd *cmd_mfi;
4465         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
4466         struct fusion_context *fusion = NULL;
4467         struct megasas_cmd_fusion *scsi_lookup;
4468         int rc;
4469         int timeout = MEGASAS_DEFAULT_TM_TIMEOUT;
4470         struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply;
4471
4472         fusion = instance->ctrl_context;
4473
4474         cmd_mfi = megasas_get_cmd(instance);
4475
4476         if (!cmd_mfi) {
4477                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
4478                         __func__, __LINE__);
4479                 return -ENOMEM;
4480         }
4481
4482         cmd_fusion = megasas_get_cmd_fusion(instance,
4483                         instance->max_scsi_cmds + cmd_mfi->index);
4484
4485         /*  Save the smid. To be used for returning the cmd */
4486         cmd_mfi->context.smid = cmd_fusion->index;
4487
4488         req_desc = megasas_get_request_descriptor(instance,
4489                         (cmd_fusion->index - 1));
4490
4491         cmd_fusion->request_desc = req_desc;
4492         req_desc->Words = 0;
4493
4494         mr_request = (struct MR_TASK_MANAGE_REQUEST *) cmd_fusion->io_request;
4495         memset(mr_request, 0, sizeof(struct MR_TASK_MANAGE_REQUEST));
4496         mpi_request = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *) &mr_request->TmRequest;
4497         mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
4498         mpi_request->DevHandle = cpu_to_le16(device_handle);
4499         mpi_request->TaskType = type;
4500         mpi_request->TaskMID = cpu_to_le16(smid_task);
4501         mpi_request->LUN[1] = 0;
4502
4503
4504         req_desc = cmd_fusion->request_desc;
4505         req_desc->HighPriority.SMID = cpu_to_le16(cmd_fusion->index);
4506         req_desc->HighPriority.RequestFlags =
4507                 (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
4508                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
4509         req_desc->HighPriority.MSIxIndex =  0;
4510         req_desc->HighPriority.LMID = 0;
4511         req_desc->HighPriority.Reserved1 = 0;
4512
4513         if (channel < MEGASAS_MAX_PD_CHANNELS)
4514                 mr_request->tmReqFlags.isTMForPD = 1;
4515         else
4516                 mr_request->tmReqFlags.isTMForLD = 1;
4517
4518         init_completion(&cmd_fusion->done);
4519         megasas_fire_cmd_fusion(instance, req_desc);
4520
4521         switch (type) {
4522         case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
4523                 timeout = mr_device_priv_data->task_abort_tmo;
4524                 break;
4525         case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
4526                 timeout = mr_device_priv_data->target_reset_tmo;
4527                 break;
4528         }
4529
4530         timeleft = wait_for_completion_timeout(&cmd_fusion->done, timeout * HZ);
4531
4532         if (!timeleft) {
4533                 dev_err(&instance->pdev->dev,
4534                         "task mgmt type 0x%x timed out\n", type);
4535                 cmd_mfi->flags |= DRV_DCMD_SKIP_REFIRE;
4536                 mutex_unlock(&instance->reset_mutex);
4537                 rc = megasas_reset_fusion(instance->host, MFI_IO_TIMEOUT_OCR);
4538                 mutex_lock(&instance->reset_mutex);
4539                 return rc;
4540         }
4541
4542         mpi_reply = (struct MPI2_SCSI_TASK_MANAGE_REPLY *) &mr_request->TMReply;
4543         megasas_tm_response_code(instance, mpi_reply);
4544
4545         megasas_return_cmd(instance, cmd_mfi);
4546         rc = SUCCESS;
4547         switch (type) {
4548         case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
4549                 scsi_lookup = fusion->cmd_list[smid_task - 1];
4550
4551                 if (scsi_lookup->scmd == NULL)
4552                         break;
4553                 else {
4554                         instance->instancet->disable_intr(instance);
4555                         megasas_sync_irqs((unsigned long)instance);
4556                         instance->instancet->enable_intr(instance);
4557                         megasas_enable_irq_poll(instance);
4558                         if (scsi_lookup->scmd == NULL)
4559                                 break;
4560                 }
4561                 rc = FAILED;
4562                 break;
4563
4564         case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
4565                 if ((channel == 0xFFFFFFFF) && (id == 0xFFFFFFFF))
4566                         break;
4567                 instance->instancet->disable_intr(instance);
4568                 megasas_sync_irqs((unsigned long)instance);
4569                 rc = megasas_track_scsiio(instance, id, channel);
4570                 instance->instancet->enable_intr(instance);
4571                 megasas_enable_irq_poll(instance);
4572
4573                 break;
4574         case MPI2_SCSITASKMGMT_TASKTYPE_ABRT_TASK_SET:
4575         case MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK:
4576                 break;
4577         default:
4578                 rc = FAILED;
4579                 break;
4580         }
4581
4582         return rc;
4583
4584 }
4585
4586 /*
4587  * megasas_fusion_smid_lookup : Look for fusion command correpspodning to SCSI
4588  * @instance: per adapter struct
4589  *
4590  * Return Non Zero index, if SMID found in outstanding commands
4591  */
4592 static u16 megasas_fusion_smid_lookup(struct scsi_cmnd *scmd)
4593 {
4594         int i, ret = 0;
4595         struct megasas_instance *instance;
4596         struct megasas_cmd_fusion *cmd_fusion;
4597         struct fusion_context *fusion;
4598
4599         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4600
4601         fusion = instance->ctrl_context;
4602
4603         for (i = 0; i < instance->max_scsi_cmds; i++) {
4604                 cmd_fusion = fusion->cmd_list[i];
4605                 if (cmd_fusion->scmd && (cmd_fusion->scmd == scmd)) {
4606                         scmd_printk(KERN_NOTICE, scmd, "Abort request is for"
4607                                 " SMID: %d\n", cmd_fusion->index);
4608                         ret = cmd_fusion->index;
4609                         break;
4610                 }
4611         }
4612
4613         return ret;
4614 }
4615
4616 /*
4617 * megasas_get_tm_devhandle - Get devhandle for TM request
4618 * @sdev-                     OS provided scsi device
4619 *
4620 * Returns-                   devhandle/targetID of SCSI device
4621 */
4622 static u16 megasas_get_tm_devhandle(struct scsi_device *sdev)
4623 {
4624         u16 pd_index = 0;
4625         u32 device_id;
4626         struct megasas_instance *instance;
4627         struct fusion_context *fusion;
4628         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
4629         u16 devhandle = (u16)ULONG_MAX;
4630
4631         instance = (struct megasas_instance *)sdev->host->hostdata;
4632         fusion = instance->ctrl_context;
4633
4634         if (!MEGASAS_IS_LOGICAL(sdev)) {
4635                 if (instance->use_seqnum_jbod_fp) {
4636                         pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
4637                                     + sdev->id;
4638                         pd_sync = (void *)fusion->pd_seq_sync
4639                                         [(instance->pd_seq_map_id - 1) & 1];
4640                         devhandle = pd_sync->seq[pd_index].devHandle;
4641                 } else
4642                         sdev_printk(KERN_ERR, sdev, "Firmware expose tmCapable"
4643                                 " without JBOD MAP support from %s %d\n", __func__, __LINE__);
4644         } else {
4645                 device_id = ((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL)
4646                                 + sdev->id;
4647                 devhandle = device_id;
4648         }
4649
4650         return devhandle;
4651 }
4652
4653 /*
4654  * megasas_task_abort_fusion : SCSI task abort function for fusion adapters
4655  * @scmd : pointer to scsi command object
4656  *
4657  * Return SUCCESS, if command aborted else FAILED
4658  */
4659
4660 int megasas_task_abort_fusion(struct scsi_cmnd *scmd)
4661 {
4662         struct megasas_instance *instance;
4663         u16 smid, devhandle;
4664         int ret;
4665         struct MR_PRIV_DEVICE *mr_device_priv_data;
4666         mr_device_priv_data = scmd->device->hostdata;
4667
4668         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4669
4670         if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
4671                 dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL,"
4672                 "SCSI host:%d\n", instance->host->host_no);
4673                 ret = FAILED;
4674                 return ret;
4675         }
4676
4677         if (!mr_device_priv_data) {
4678                 sdev_printk(KERN_INFO, scmd->device, "device been deleted! "
4679                         "scmd(%p)\n", scmd);
4680                 scmd->result = DID_NO_CONNECT << 16;
4681                 ret = SUCCESS;
4682                 goto out;
4683         }
4684
4685         if (!mr_device_priv_data->is_tm_capable) {
4686                 ret = FAILED;
4687                 goto out;
4688         }
4689
4690         mutex_lock(&instance->reset_mutex);
4691
4692         smid = megasas_fusion_smid_lookup(scmd);
4693
4694         if (!smid) {
4695                 ret = SUCCESS;
4696                 scmd_printk(KERN_NOTICE, scmd, "Command for which abort is"
4697                         " issued is not found in outstanding commands\n");
4698                 mutex_unlock(&instance->reset_mutex);
4699                 goto out;
4700         }
4701
4702         devhandle = megasas_get_tm_devhandle(scmd->device);
4703
4704         if (devhandle == (u16)ULONG_MAX) {
4705                 ret = SUCCESS;
4706                 sdev_printk(KERN_INFO, scmd->device,
4707                         "task abort issued for invalid devhandle\n");
4708                 mutex_unlock(&instance->reset_mutex);
4709                 goto out;
4710         }
4711         sdev_printk(KERN_INFO, scmd->device,
4712                 "attempting task abort! scmd(0x%p) tm_dev_handle 0x%x\n",
4713                 scmd, devhandle);
4714
4715         mr_device_priv_data->tm_busy = 1;
4716         ret = megasas_issue_tm(instance, devhandle,
4717                         scmd->device->channel, scmd->device->id, smid,
4718                         MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK,
4719                         mr_device_priv_data);
4720         mr_device_priv_data->tm_busy = 0;
4721
4722         mutex_unlock(&instance->reset_mutex);
4723         scmd_printk(KERN_INFO, scmd, "task abort %s!! scmd(0x%p)\n",
4724                         ((ret == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);
4725 out:
4726         scsi_print_command(scmd);
4727         if (megasas_dbg_lvl & TM_DEBUG)
4728                 megasas_dump_fusion_io(scmd);
4729
4730         return ret;
4731 }
4732
4733 /*
4734  * megasas_reset_target_fusion : target reset function for fusion adapters
4735  * scmd: SCSI command pointer
4736  *
4737  * Returns SUCCESS if all commands associated with target aborted else FAILED
4738  */
4739
4740 int megasas_reset_target_fusion(struct scsi_cmnd *scmd)
4741 {
4742
4743         struct megasas_instance *instance;
4744         int ret = FAILED;
4745         u16 devhandle;
4746         struct MR_PRIV_DEVICE *mr_device_priv_data;
4747         mr_device_priv_data = scmd->device->hostdata;
4748
4749         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4750
4751         if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
4752                 dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL,"
4753                 "SCSI host:%d\n", instance->host->host_no);
4754                 ret = FAILED;
4755                 return ret;
4756         }
4757
4758         if (!mr_device_priv_data) {
4759                 sdev_printk(KERN_INFO, scmd->device,
4760                             "device been deleted! scmd: (0x%p)\n", scmd);
4761                 scmd->result = DID_NO_CONNECT << 16;
4762                 ret = SUCCESS;
4763                 goto out;
4764         }
4765
4766         if (!mr_device_priv_data->is_tm_capable) {
4767                 ret = FAILED;
4768                 goto out;
4769         }
4770
4771         mutex_lock(&instance->reset_mutex);
4772         devhandle = megasas_get_tm_devhandle(scmd->device);
4773
4774         if (devhandle == (u16)ULONG_MAX) {
4775                 ret = SUCCESS;
4776                 sdev_printk(KERN_INFO, scmd->device,
4777                         "target reset issued for invalid devhandle\n");
4778                 mutex_unlock(&instance->reset_mutex);
4779                 goto out;
4780         }
4781
4782         sdev_printk(KERN_INFO, scmd->device,
4783                 "attempting target reset! scmd(0x%p) tm_dev_handle: 0x%x\n",
4784                 scmd, devhandle);
4785         mr_device_priv_data->tm_busy = 1;
4786         ret = megasas_issue_tm(instance, devhandle,
4787                         scmd->device->channel, scmd->device->id, 0,
4788                         MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET,
4789                         mr_device_priv_data);
4790         mr_device_priv_data->tm_busy = 0;
4791         mutex_unlock(&instance->reset_mutex);
4792         scmd_printk(KERN_NOTICE, scmd, "target reset %s!!\n",
4793                 (ret == SUCCESS) ? "SUCCESS" : "FAILED");
4794
4795 out:
4796         return ret;
4797 }
4798
4799 /*SRIOV get other instance in cluster if any*/
4800 static struct
4801 megasas_instance *megasas_get_peer_instance(struct megasas_instance *instance)
4802 {
4803         int i;
4804
4805         for (i = 0; i < MAX_MGMT_ADAPTERS; i++) {
4806                 if (megasas_mgmt_info.instance[i] &&
4807                         (megasas_mgmt_info.instance[i] != instance) &&
4808                          megasas_mgmt_info.instance[i]->requestorId &&
4809                          megasas_mgmt_info.instance[i]->peerIsPresent &&
4810                         (memcmp((megasas_mgmt_info.instance[i]->clusterId),
4811                         instance->clusterId, MEGASAS_CLUSTER_ID_SIZE) == 0))
4812                         return megasas_mgmt_info.instance[i];
4813         }
4814         return NULL;
4815 }
4816
4817 /* Check for a second path that is currently UP */
4818 int megasas_check_mpio_paths(struct megasas_instance *instance,
4819         struct scsi_cmnd *scmd)
4820 {
4821         struct megasas_instance *peer_instance = NULL;
4822         int retval = (DID_REQUEUE << 16);
4823
4824         if (instance->peerIsPresent) {
4825                 peer_instance = megasas_get_peer_instance(instance);
4826                 if ((peer_instance) &&
4827                         (atomic_read(&peer_instance->adprecovery) ==
4828                         MEGASAS_HBA_OPERATIONAL))
4829                         retval = (DID_NO_CONNECT << 16);
4830         }
4831         return retval;
4832 }
4833
4834 /* Core fusion reset function */
4835 int megasas_reset_fusion(struct Scsi_Host *shost, int reason)
4836 {
4837         int retval = SUCCESS, i, j, convert = 0;
4838         struct megasas_instance *instance;
4839         struct megasas_cmd_fusion *cmd_fusion, *r1_cmd;
4840         struct fusion_context *fusion;
4841         u32 abs_state, status_reg, reset_adapter, fpio_count = 0;
4842         u32 io_timeout_in_crash_mode = 0;
4843         struct scsi_cmnd *scmd_local = NULL;
4844         struct scsi_device *sdev;
4845         int ret_target_prop = DCMD_FAILED;
4846         bool is_target_prop = false;
4847         bool do_adp_reset = true;
4848         int max_reset_tries = MEGASAS_FUSION_MAX_RESET_TRIES;
4849
4850         instance = (struct megasas_instance *)shost->hostdata;
4851         fusion = instance->ctrl_context;
4852
4853         mutex_lock(&instance->reset_mutex);
4854
4855         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
4856                 dev_warn(&instance->pdev->dev, "Hardware critical error, "
4857                        "returning FAILED for scsi%d.\n",
4858                         instance->host->host_no);
4859                 mutex_unlock(&instance->reset_mutex);
4860                 return FAILED;
4861         }
4862         status_reg = instance->instancet->read_fw_status_reg(instance);
4863         abs_state = status_reg & MFI_STATE_MASK;
4864
4865         /* IO timeout detected, forcibly put FW in FAULT state */
4866         if (abs_state != MFI_STATE_FAULT && instance->crash_dump_buf &&
4867                 instance->crash_dump_app_support && reason) {
4868                 dev_info(&instance->pdev->dev, "IO/DCMD timeout is detected, "
4869                         "forcibly FAULT Firmware\n");
4870                 atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
4871                 status_reg = megasas_readl(instance, &instance->reg_set->doorbell);
4872                 writel(status_reg | MFI_STATE_FORCE_OCR,
4873                         &instance->reg_set->doorbell);
4874                 readl(&instance->reg_set->doorbell);
4875                 mutex_unlock(&instance->reset_mutex);
4876                 do {
4877                         ssleep(3);
4878                         io_timeout_in_crash_mode++;
4879                         dev_dbg(&instance->pdev->dev, "waiting for [%d] "
4880                                 "seconds for crash dump collection and OCR "
4881                                 "to be done\n", (io_timeout_in_crash_mode * 3));
4882                 } while ((atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) &&
4883                         (io_timeout_in_crash_mode < 80));
4884
4885                 if (atomic_read(&instance->adprecovery) == MEGASAS_HBA_OPERATIONAL) {
4886                         dev_info(&instance->pdev->dev, "OCR done for IO "
4887                                 "timeout case\n");
4888                         retval = SUCCESS;
4889                 } else {
4890                         dev_info(&instance->pdev->dev, "Controller is not "
4891                                 "operational after 240 seconds wait for IO "
4892                                 "timeout case in FW crash dump mode\n do "
4893                                 "OCR/kill adapter\n");
4894                         retval = megasas_reset_fusion(shost, 0);
4895                 }
4896                 return retval;
4897         }
4898
4899         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
4900                 del_timer_sync(&instance->sriov_heartbeat_timer);
4901         set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
4902         set_bit(MEGASAS_FUSION_OCR_NOT_POSSIBLE, &instance->reset_flags);
4903         atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_POLLING);
4904         instance->instancet->disable_intr(instance);
4905         megasas_sync_irqs((unsigned long)instance);
4906
4907         /* First try waiting for commands to complete */
4908         if (megasas_wait_for_outstanding_fusion(instance, reason,
4909                                                 &convert)) {
4910                 atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
4911                 dev_warn(&instance->pdev->dev, "resetting fusion "
4912                        "adapter scsi%d.\n", instance->host->host_no);
4913                 if (convert)
4914                         reason = 0;
4915
4916                 if (megasas_dbg_lvl & OCR_DEBUG)
4917                         dev_info(&instance->pdev->dev, "\nPending SCSI commands:\n");
4918
4919                 /* Now return commands back to the OS */
4920                 for (i = 0 ; i < instance->max_scsi_cmds; i++) {
4921                         cmd_fusion = fusion->cmd_list[i];
4922                         /*check for extra commands issued by driver*/
4923                         if (instance->adapter_type >= VENTURA_SERIES) {
4924                                 r1_cmd = fusion->cmd_list[i + instance->max_fw_cmds];
4925                                 megasas_return_cmd_fusion(instance, r1_cmd);
4926                         }
4927                         scmd_local = cmd_fusion->scmd;
4928                         if (cmd_fusion->scmd) {
4929                                 if (megasas_dbg_lvl & OCR_DEBUG) {
4930                                         sdev_printk(KERN_INFO,
4931                                                 cmd_fusion->scmd->device, "SMID: 0x%x\n",
4932                                                 cmd_fusion->index);
4933                                         megasas_dump_fusion_io(cmd_fusion->scmd);
4934                                 }
4935
4936                                 if (cmd_fusion->io_request->Function ==
4937                                         MPI2_FUNCTION_SCSI_IO_REQUEST)
4938                                         fpio_count++;
4939
4940                                 scmd_local->result =
4941                                         megasas_check_mpio_paths(instance,
4942                                                         scmd_local);
4943                                 if (instance->ldio_threshold &&
4944                                         megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
4945                                         atomic_dec(&instance->ldio_outstanding);
4946                                 megasas_return_cmd_fusion(instance, cmd_fusion);
4947                                 scsi_dma_unmap(scmd_local);
4948                                 scmd_local->scsi_done(scmd_local);
4949                         }
4950                 }
4951
4952                 dev_info(&instance->pdev->dev, "Outstanding fastpath IOs: %d\n",
4953                         fpio_count);
4954
4955                 atomic_set(&instance->fw_outstanding, 0);
4956
4957                 status_reg = instance->instancet->read_fw_status_reg(instance);
4958                 abs_state = status_reg & MFI_STATE_MASK;
4959                 reset_adapter = status_reg & MFI_RESET_ADAPTER;
4960                 if (instance->disableOnlineCtrlReset ||
4961                     (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
4962                         /* Reset not supported, kill adapter */
4963                         dev_warn(&instance->pdev->dev, "Reset not supported"
4964                                ", killing adapter scsi%d.\n",
4965                                 instance->host->host_no);
4966                         goto kill_hba;
4967                 }
4968
4969                 /* Let SR-IOV VF & PF sync up if there was a HB failure */
4970                 if (instance->requestorId && !reason) {
4971                         msleep(MEGASAS_OCR_SETTLE_TIME_VF);
4972                         do_adp_reset = false;
4973                         max_reset_tries = MEGASAS_SRIOV_MAX_RESET_TRIES_VF;
4974                 }
4975
4976                 /* Now try to reset the chip */
4977                 for (i = 0; i < max_reset_tries; i++) {
4978                         /*
4979                          * Do adp reset and wait for
4980                          * controller to transition to ready
4981                          */
4982                         if (megasas_adp_reset_wait_for_ready(instance,
4983                                 do_adp_reset, 1) == FAILED)
4984                                 continue;
4985
4986                         /* Wait for FW to become ready */
4987                         if (megasas_transition_to_ready(instance, 1)) {
4988                                 dev_warn(&instance->pdev->dev,
4989                                         "Failed to transition controller to ready for "
4990                                         "scsi%d.\n", instance->host->host_no);
4991                                 continue;
4992                         }
4993                         megasas_reset_reply_desc(instance);
4994                         megasas_fusion_update_can_queue(instance, OCR_CONTEXT);
4995
4996                         if (megasas_ioc_init_fusion(instance)) {
4997                                 continue;
4998                         }
4999
5000                         if (megasas_get_ctrl_info(instance)) {
5001                                 dev_info(&instance->pdev->dev,
5002                                         "Failed from %s %d\n",
5003                                         __func__, __LINE__);
5004                                 goto kill_hba;
5005                         }
5006
5007                         megasas_refire_mgmt_cmd(instance,
5008                                                 (i == (MEGASAS_FUSION_MAX_RESET_TRIES - 1)
5009                                                         ? 1 : 0));
5010
5011                         /* Reset load balance info */
5012                         if (fusion->load_balance_info)
5013                                 memset(fusion->load_balance_info, 0,
5014                                        (sizeof(struct LD_LOAD_BALANCE_INFO) *
5015                                        MAX_LOGICAL_DRIVES_EXT));
5016
5017                         if (!megasas_get_map_info(instance)) {
5018                                 megasas_sync_map_info(instance);
5019                         } else {
5020                                 /*
5021                                  * Return pending polled mode cmds before
5022                                  * retrying OCR
5023                                  */
5024                                 megasas_return_polled_cmds(instance);
5025                                 continue;
5026                         }
5027
5028                         megasas_setup_jbod_map(instance);
5029
5030                         /* reset stream detection array */
5031                         if (instance->adapter_type >= VENTURA_SERIES) {
5032                                 for (j = 0; j < MAX_LOGICAL_DRIVES_EXT; ++j) {
5033                                         memset(fusion->stream_detect_by_ld[j],
5034                                         0, sizeof(struct LD_STREAM_DETECT));
5035                                  fusion->stream_detect_by_ld[j]->mru_bit_map
5036                                                 = MR_STREAM_BITMAP;
5037                                 }
5038                         }
5039
5040                         clear_bit(MEGASAS_FUSION_IN_RESET,
5041                                   &instance->reset_flags);
5042                         instance->instancet->enable_intr(instance);
5043                         megasas_enable_irq_poll(instance);
5044                         shost_for_each_device(sdev, shost) {
5045                                 if ((instance->tgt_prop) &&
5046                                     (instance->nvme_page_size))
5047                                         ret_target_prop = megasas_get_target_prop(instance, sdev);
5048
5049                                 is_target_prop = (ret_target_prop == DCMD_SUCCESS) ? true : false;
5050                                 megasas_set_dynamic_target_properties(sdev, is_target_prop);
5051                         }
5052
5053                         status_reg = instance->instancet->read_fw_status_reg
5054                                         (instance);
5055                         abs_state = status_reg & MFI_STATE_MASK;
5056                         if (abs_state != MFI_STATE_OPERATIONAL) {
5057                                 dev_info(&instance->pdev->dev,
5058                                          "Adapter is not OPERATIONAL, state 0x%x for scsi:%d\n",
5059                                          abs_state, instance->host->host_no);
5060                                 goto out;
5061                         }
5062                         atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
5063
5064                         dev_info(&instance->pdev->dev,
5065                                  "Adapter is OPERATIONAL for scsi:%d\n",
5066                                  instance->host->host_no);
5067
5068                         /* Restart SR-IOV heartbeat */
5069                         if (instance->requestorId) {
5070                                 if (!megasas_sriov_start_heartbeat(instance, 0))
5071                                         megasas_start_timer(instance);
5072                                 else
5073                                         instance->skip_heartbeat_timer_del = 1;
5074                         }
5075
5076                         if (instance->crash_dump_drv_support &&
5077                                 instance->crash_dump_app_support)
5078                                 megasas_set_crash_dump_params(instance,
5079                                         MR_CRASH_BUF_TURN_ON);
5080                         else
5081                                 megasas_set_crash_dump_params(instance,
5082                                         MR_CRASH_BUF_TURN_OFF);
5083
5084                         if (instance->snapdump_wait_time) {
5085                                 megasas_get_snapdump_properties(instance);
5086                                 dev_info(&instance->pdev->dev,
5087                                          "Snap dump wait time\t: %d\n",
5088                                          instance->snapdump_wait_time);
5089                         }
5090
5091                         retval = SUCCESS;
5092
5093                         /* Adapter reset completed successfully */
5094                         dev_warn(&instance->pdev->dev,
5095                                  "Reset successful for scsi%d.\n",
5096                                  instance->host->host_no);
5097
5098                         goto out;
5099                 }
5100                 /* Reset failed, kill the adapter */
5101                 dev_warn(&instance->pdev->dev, "Reset failed, killing "
5102                        "adapter scsi%d.\n", instance->host->host_no);
5103                 goto kill_hba;
5104         } else {
5105                 /* For VF: Restart HB timer if we didn't OCR */
5106                 if (instance->requestorId) {
5107                         megasas_start_timer(instance);
5108                 }
5109                 clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
5110                 instance->instancet->enable_intr(instance);
5111                 megasas_enable_irq_poll(instance);
5112                 atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
5113                 goto out;
5114         }
5115 kill_hba:
5116         megaraid_sas_kill_hba(instance);
5117         megasas_enable_irq_poll(instance);
5118         instance->skip_heartbeat_timer_del = 1;
5119         retval = FAILED;
5120 out:
5121         clear_bit(MEGASAS_FUSION_OCR_NOT_POSSIBLE, &instance->reset_flags);
5122         mutex_unlock(&instance->reset_mutex);
5123         return retval;
5124 }
5125
5126 /* Fusion Crash dump collection */
5127 static void  megasas_fusion_crash_dump(struct megasas_instance *instance)
5128 {
5129         u32 status_reg;
5130         u8 partial_copy = 0;
5131         int wait = 0;
5132
5133
5134         status_reg = instance->instancet->read_fw_status_reg(instance);
5135
5136         /*
5137          * Allocate host crash buffers to copy data from 1 MB DMA crash buffer
5138          * to host crash buffers
5139          */
5140         if (instance->drv_buf_index == 0) {
5141                 /* Buffer is already allocated for old Crash dump.
5142                  * Do OCR and do not wait for crash dump collection
5143                  */
5144                 if (instance->drv_buf_alloc) {
5145                         dev_info(&instance->pdev->dev, "earlier crash dump is "
5146                                 "not yet copied by application, ignoring this "
5147                                 "crash dump and initiating OCR\n");
5148                         status_reg |= MFI_STATE_CRASH_DUMP_DONE;
5149                         writel(status_reg,
5150                                 &instance->reg_set->outbound_scratch_pad_0);
5151                         readl(&instance->reg_set->outbound_scratch_pad_0);
5152                         return;
5153                 }
5154                 megasas_alloc_host_crash_buffer(instance);
5155                 dev_info(&instance->pdev->dev, "Number of host crash buffers "
5156                         "allocated: %d\n", instance->drv_buf_alloc);
5157         }
5158
5159         while (!(status_reg & MFI_STATE_CRASH_DUMP_DONE) &&
5160                (wait < MEGASAS_WATCHDOG_WAIT_COUNT)) {
5161                 if (!(status_reg & MFI_STATE_DMADONE)) {
5162                         /*
5163                          * Next crash dump buffer is not yet DMA'd by FW
5164                          * Check after 10ms. Wait for 1 second for FW to
5165                          * post the next buffer. If not bail out.
5166                          */
5167                         wait++;
5168                         msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
5169                         status_reg = instance->instancet->read_fw_status_reg(
5170                                         instance);
5171                         continue;
5172                 }
5173
5174                 wait = 0;
5175                 if (instance->drv_buf_index >= instance->drv_buf_alloc) {
5176                         dev_info(&instance->pdev->dev,
5177                                  "Driver is done copying the buffer: %d\n",
5178                                  instance->drv_buf_alloc);
5179                         status_reg |= MFI_STATE_CRASH_DUMP_DONE;
5180                         partial_copy = 1;
5181                         break;
5182                 } else {
5183                         memcpy(instance->crash_buf[instance->drv_buf_index],
5184                                instance->crash_dump_buf, CRASH_DMA_BUF_SIZE);
5185                         instance->drv_buf_index++;
5186                         status_reg &= ~MFI_STATE_DMADONE;
5187                 }
5188
5189                 writel(status_reg, &instance->reg_set->outbound_scratch_pad_0);
5190                 readl(&instance->reg_set->outbound_scratch_pad_0);
5191
5192                 msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
5193                 status_reg = instance->instancet->read_fw_status_reg(instance);
5194         }
5195
5196         if (status_reg & MFI_STATE_CRASH_DUMP_DONE) {
5197                 dev_info(&instance->pdev->dev, "Crash Dump is available,number "
5198                         "of copied buffers: %d\n", instance->drv_buf_index);
5199                 instance->fw_crash_buffer_size =  instance->drv_buf_index;
5200                 instance->fw_crash_state = AVAILABLE;
5201                 instance->drv_buf_index = 0;
5202                 writel(status_reg, &instance->reg_set->outbound_scratch_pad_0);
5203                 readl(&instance->reg_set->outbound_scratch_pad_0);
5204                 if (!partial_copy)
5205                         megasas_reset_fusion(instance->host, 0);
5206         }
5207 }
5208
5209
5210 /* Fusion OCR work queue */
5211 void megasas_fusion_ocr_wq(struct work_struct *work)
5212 {
5213         struct megasas_instance *instance =
5214                 container_of(work, struct megasas_instance, work_init);
5215
5216         megasas_reset_fusion(instance->host, 0);
5217 }
5218
5219 /* Allocate fusion context */
5220 int
5221 megasas_alloc_fusion_context(struct megasas_instance *instance)
5222 {
5223         struct fusion_context *fusion;
5224
5225         instance->ctrl_context = kzalloc(sizeof(struct fusion_context),
5226                                          GFP_KERNEL);
5227         if (!instance->ctrl_context) {
5228                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
5229                         __func__, __LINE__);
5230                 return -ENOMEM;
5231         }
5232
5233         fusion = instance->ctrl_context;
5234
5235         fusion->log_to_span_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
5236                                               sizeof(LD_SPAN_INFO));
5237         fusion->log_to_span =
5238                 (PLD_SPAN_INFO)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
5239                                                 fusion->log_to_span_pages);
5240         if (!fusion->log_to_span) {
5241                 fusion->log_to_span =
5242                         vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT,
5243                                            sizeof(LD_SPAN_INFO)));
5244                 if (!fusion->log_to_span) {
5245                         dev_err(&instance->pdev->dev, "Failed from %s %d\n",
5246                                 __func__, __LINE__);
5247                         return -ENOMEM;
5248                 }
5249         }
5250
5251         fusion->load_balance_info_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
5252                 sizeof(struct LD_LOAD_BALANCE_INFO));
5253         fusion->load_balance_info =
5254                 (struct LD_LOAD_BALANCE_INFO *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
5255                 fusion->load_balance_info_pages);
5256         if (!fusion->load_balance_info) {
5257                 fusion->load_balance_info =
5258                         vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT,
5259                                            sizeof(struct LD_LOAD_BALANCE_INFO)));
5260                 if (!fusion->load_balance_info)
5261                         dev_err(&instance->pdev->dev, "Failed to allocate load_balance_info, "
5262                                 "continuing without Load Balance support\n");
5263         }
5264
5265         return 0;
5266 }
5267
5268 void
5269 megasas_free_fusion_context(struct megasas_instance *instance)
5270 {
5271         struct fusion_context *fusion = instance->ctrl_context;
5272
5273         if (fusion) {
5274                 if (fusion->load_balance_info) {
5275                         if (is_vmalloc_addr(fusion->load_balance_info))
5276                                 vfree(fusion->load_balance_info);
5277                         else
5278                                 free_pages((ulong)fusion->load_balance_info,
5279                                         fusion->load_balance_info_pages);
5280                 }
5281
5282                 if (fusion->log_to_span) {
5283                         if (is_vmalloc_addr(fusion->log_to_span))
5284                                 vfree(fusion->log_to_span);
5285                         else
5286                                 free_pages((ulong)fusion->log_to_span,
5287                                            fusion->log_to_span_pages);
5288                 }
5289
5290                 kfree(fusion);
5291         }
5292 }
5293
5294 struct megasas_instance_template megasas_instance_template_fusion = {
5295         .enable_intr = megasas_enable_intr_fusion,
5296         .disable_intr = megasas_disable_intr_fusion,
5297         .clear_intr = megasas_clear_intr_fusion,
5298         .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
5299         .adp_reset = megasas_adp_reset_fusion,
5300         .check_reset = megasas_check_reset_fusion,
5301         .service_isr = megasas_isr_fusion,
5302         .tasklet = megasas_complete_cmd_dpc_fusion,
5303         .init_adapter = megasas_init_adapter_fusion,
5304         .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
5305         .issue_dcmd = megasas_issue_dcmd_fusion,
5306 };