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 | __GFP_NOWARN,
 627                                 &fusion->io_request_frames_phys);
 628         if (!fusion->io_request_frames) {
 629                 if (instance->max_fw_cmds >= (MEGASAS_REDUCE_QD_COUNT * 2)) {
 630                         instance->max_fw_cmds -= MEGASAS_REDUCE_QD_COUNT;
 631                         dma_pool_destroy(fusion->io_request_frames_pool);
 632                         megasas_configure_queue_sizes(instance);
 633                         goto retry_alloc;
 634                 } else {
 635                         dev_err(&instance->pdev->dev,
 636                                 "Failed from %s %d\n",  __func__, __LINE__);
 637                         return -ENOMEM;
 638                 }
 639         }
 640
 641         if (!megasas_check_same_4gb_region(instance,
 642                                            fusion->io_request_frames_phys,
 643                                            fusion->io_frames_alloc_sz)) {
 644                 dma_pool_free(fusion->io_request_frames_pool,
 645                               fusion->io_request_frames,
 646                               fusion->io_request_frames_phys);
 647                 fusion->io_request_frames = NULL;
 648                 dma_pool_destroy(fusion->io_request_frames_pool);
 649
 650                 fusion->io_request_frames_pool =
 651                         dma_pool_create("mr_ioreq_align",
 652                                         &instance->pdev->dev,
 653                                         fusion->io_frames_alloc_sz,
 654                                         roundup_pow_of_two(fusion->io_frames_alloc_sz),
 655                                         0);
 656
 657                 if (!fusion->io_request_frames_pool) {
 658                         dev_err(&instance->pdev->dev,
 659                                 "Failed from %s %d\n",  __func__, __LINE__);
 660                         return -ENOMEM;
 661                 }
 662
 663                 fusion->io_request_frames =
 664                         dma_pool_alloc(fusion->io_request_frames_pool,
 665                                        GFP_KERNEL | __GFP_NOWARN,
 666                                        &fusion->io_request_frames_phys);
 667
 668                 if (!fusion->io_request_frames) {
 669                         dev_err(&instance->pdev->dev,
 670                                 "Failed from %s %d\n",  __func__, __LINE__);
 671                         return -ENOMEM;
 672                 }
 673         }
 674
 675         fusion->req_frames_desc =
 676                 dma_alloc_coherent(&instance->pdev->dev,
 677                                    fusion->request_alloc_sz,
 678                                    &fusion->req_frames_desc_phys, GFP_KERNEL);
 679         if (!fusion->req_frames_desc) {
 680                 dev_err(&instance->pdev->dev,
 681                         "Failed from %s %d\n",  __func__, __LINE__);
 682                 return -ENOMEM;
 683         }
 684
 685         return 0;
 686 }
 687
 688 static int
 689 megasas_alloc_reply_fusion(struct megasas_instance *instance)
 690 {
 691         int i, count;
 692         struct fusion_context *fusion;
 693         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 694         fusion = instance->ctrl_context;
 695
 696         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 697         fusion->reply_frames_desc_pool =
 698                         dma_pool_create("mr_reply", &instance->pdev->dev,
 699                                 fusion->reply_alloc_sz * count, 16, 0);
 700
 701         if (!fusion->reply_frames_desc_pool) {
 702                 dev_err(&instance->pdev->dev,
 703                         "Failed from %s %d\n",  __func__, __LINE__);
 704                 return -ENOMEM;
 705         }
 706
 707         fusion->reply_frames_desc[0] =
 708                 dma_pool_alloc(fusion->reply_frames_desc_pool,
 709                         GFP_KERNEL, &fusion->reply_frames_desc_phys[0]);
 710         if (!fusion->reply_frames_desc[0]) {
 711                 dev_err(&instance->pdev->dev,
 712                         "Failed from %s %d\n",  __func__, __LINE__);
 713                 return -ENOMEM;
 714         }
 715
 716         if (!megasas_check_same_4gb_region(instance,
 717                                            fusion->reply_frames_desc_phys[0],
 718                                            (fusion->reply_alloc_sz * count))) {
 719                 dma_pool_free(fusion->reply_frames_desc_pool,
 720                               fusion->reply_frames_desc[0],
 721                               fusion->reply_frames_desc_phys[0]);
 722                 fusion->reply_frames_desc[0] = NULL;
 723                 dma_pool_destroy(fusion->reply_frames_desc_pool);
 724
 725                 fusion->reply_frames_desc_pool =
 726                         dma_pool_create("mr_reply_align",
 727                                         &instance->pdev->dev,
 728                                         fusion->reply_alloc_sz * count,
 729                                         roundup_pow_of_two(fusion->reply_alloc_sz * count),
 730                                         0);
 731
 732                 if (!fusion->reply_frames_desc_pool) {
 733                         dev_err(&instance->pdev->dev,
 734                                 "Failed from %s %d\n",  __func__, __LINE__);
 735                         return -ENOMEM;
 736                 }
 737
 738                 fusion->reply_frames_desc[0] =
 739                         dma_pool_alloc(fusion->reply_frames_desc_pool,
 740                                        GFP_KERNEL,
 741                                        &fusion->reply_frames_desc_phys[0]);
 742
 743                 if (!fusion->reply_frames_desc[0]) {
 744                         dev_err(&instance->pdev->dev,
 745                                 "Failed from %s %d\n",  __func__, __LINE__);
 746                         return -ENOMEM;
 747                 }
 748         }
 749
 750         reply_desc = fusion->reply_frames_desc[0];
 751         for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
 752                 reply_desc->Words = cpu_to_le64(ULLONG_MAX);
 753
 754         /* This is not a rdpq mode, but driver still populate
 755          * reply_frame_desc array to use same msix index in ISR path.
 756          */
 757         for (i = 0; i < (count - 1); i++)
 758                 fusion->reply_frames_desc[i + 1] =
 759                         fusion->reply_frames_desc[i] +
 760                         (fusion->reply_alloc_sz)/sizeof(union MPI2_REPLY_DESCRIPTORS_UNION);
 761
 762         return 0;
 763 }
 764
 765 static int
 766 megasas_alloc_rdpq_fusion(struct megasas_instance *instance)
 767 {
 768         int i, j, k, msix_count;
 769         struct fusion_context *fusion;
 770         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 771         union MPI2_REPLY_DESCRIPTORS_UNION *rdpq_chunk_virt[RDPQ_MAX_CHUNK_COUNT];
 772         dma_addr_t rdpq_chunk_phys[RDPQ_MAX_CHUNK_COUNT];
 773         u8 dma_alloc_count, abs_index;
 774         u32 chunk_size, array_size, offset;
 775
 776         fusion = instance->ctrl_context;
 777         chunk_size = fusion->reply_alloc_sz * RDPQ_MAX_INDEX_IN_ONE_CHUNK;
 778         array_size = sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) *
 779                      MAX_MSIX_QUEUES_FUSION;
 780
 781         fusion->rdpq_virt = dma_alloc_coherent(&instance->pdev->dev,
 782                                                array_size, &fusion->rdpq_phys,
 783                                                GFP_KERNEL);
 784         if (!fusion->rdpq_virt) {
 785                 dev_err(&instance->pdev->dev,
 786                         "Failed from %s %d\n",  __func__, __LINE__);
 787                 return -ENOMEM;
 788         }
 789
 790         msix_count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 791
 792         fusion->reply_frames_desc_pool = dma_pool_create("mr_rdpq",
 793                                                          &instance->pdev->dev,
 794                                                          chunk_size, 16, 0);
 795         fusion->reply_frames_desc_pool_align =
 796                                 dma_pool_create("mr_rdpq_align",
 797                                                 &instance->pdev->dev,
 798                                                 chunk_size,
 799                                                 roundup_pow_of_two(chunk_size),
 800                                                 0);
 801
 802         if (!fusion->reply_frames_desc_pool ||
 803             !fusion->reply_frames_desc_pool_align) {
 804                 dev_err(&instance->pdev->dev,
 805                         "Failed from %s %d\n",  __func__, __LINE__);
 806                 return -ENOMEM;
 807         }
 808
 809 /*
 810  * For INVADER_SERIES each set of 8 reply queues(0-7, 8-15, ..) and
 811  * VENTURA_SERIES each set of 16 reply queues(0-15, 16-31, ..) should be
 812  * within 4GB boundary and also reply queues in a set must have same
 813  * upper 32-bits in their memory address. so here driver is allocating the
 814  * DMA'able memory for reply queues according. Driver uses limitation of
 815  * VENTURA_SERIES to manage INVADER_SERIES as well.
 816  */
 817         dma_alloc_count = DIV_ROUND_UP(msix_count, RDPQ_MAX_INDEX_IN_ONE_CHUNK);
 818
 819         for (i = 0; i < dma_alloc_count; i++) {
 820                 rdpq_chunk_virt[i] =
 821                         dma_pool_alloc(fusion->reply_frames_desc_pool,
 822                                        GFP_KERNEL, &rdpq_chunk_phys[i]);
 823                 if (!rdpq_chunk_virt[i]) {
 824                         dev_err(&instance->pdev->dev,
 825                                 "Failed from %s %d\n",  __func__, __LINE__);
 826                         return -ENOMEM;
 827                 }
 828                 /* reply desc pool requires to be in same 4 gb region.
 829                  * Below function will check this.
 830                  * In case of failure, new pci pool will be created with updated
 831                  * alignment.
 832                  * For RDPQ buffers, driver always allocate two separate pci pool.
 833                  * Alignment will be used such a way that next allocation if
 834                  * success, will always meet same 4gb region requirement.
 835                  * rdpq_tracker keep track of each buffer's physical,
 836                  * virtual address and pci pool descriptor. It will help driver
 837                  * while freeing the resources.
 838                  *
 839                  */
 840                 if (!megasas_check_same_4gb_region(instance, rdpq_chunk_phys[i],
 841                                                    chunk_size)) {
 842                         dma_pool_free(fusion->reply_frames_desc_pool,
 843                                       rdpq_chunk_virt[i],
 844                                       rdpq_chunk_phys[i]);
 845
 846                         rdpq_chunk_virt[i] =
 847                                 dma_pool_alloc(fusion->reply_frames_desc_pool_align,
 848                                                GFP_KERNEL, &rdpq_chunk_phys[i]);
 849                         if (!rdpq_chunk_virt[i]) {
 850                                 dev_err(&instance->pdev->dev,
 851                                         "Failed from %s %d\n",
 852                                         __func__, __LINE__);
 853                                 return -ENOMEM;
 854                         }
 855                         fusion->rdpq_tracker[i].dma_pool_ptr =
 856                                         fusion->reply_frames_desc_pool_align;
 857                 } else {
 858                         fusion->rdpq_tracker[i].dma_pool_ptr =
 859                                         fusion->reply_frames_desc_pool;
 860                 }
 861
 862                 fusion->rdpq_tracker[i].pool_entry_phys = rdpq_chunk_phys[i];
 863                 fusion->rdpq_tracker[i].pool_entry_virt = rdpq_chunk_virt[i];
 864         }
 865
 866         for (k = 0; k < dma_alloc_count; k++) {
 867                 for (i = 0; i < RDPQ_MAX_INDEX_IN_ONE_CHUNK; i++) {
 868                         abs_index = (k * RDPQ_MAX_INDEX_IN_ONE_CHUNK) + i;
 869
 870                         if (abs_index == msix_count)
 871                                 break;
 872                         offset = fusion->reply_alloc_sz * i;
 873                         fusion->rdpq_virt[abs_index].RDPQBaseAddress =
 874                                         cpu_to_le64(rdpq_chunk_phys[k] + offset);
 875                         fusion->reply_frames_desc_phys[abs_index] =
 876                                         rdpq_chunk_phys[k] + offset;
 877                         fusion->reply_frames_desc[abs_index] =
 878                                         (union MPI2_REPLY_DESCRIPTORS_UNION *)((u8 *)rdpq_chunk_virt[k] + offset);
 879
 880                         reply_desc = fusion->reply_frames_desc[abs_index];
 881                         for (j = 0; j < fusion->reply_q_depth; j++, reply_desc++)
 882                                 reply_desc->Words = ULLONG_MAX;
 883                 }
 884         }
 885
 886         return 0;
 887 }
 888
 889 static void
 890 megasas_free_rdpq_fusion(struct megasas_instance *instance) {
 891
 892         int i;
 893         struct fusion_context *fusion;
 894
 895         fusion = instance->ctrl_context;
 896
 897         for (i = 0; i < RDPQ_MAX_CHUNK_COUNT; i++) {
 898                 if (fusion->rdpq_tracker[i].pool_entry_virt)
 899                         dma_pool_free(fusion->rdpq_tracker[i].dma_pool_ptr,
 900                                       fusion->rdpq_tracker[i].pool_entry_virt,
 901                                       fusion->rdpq_tracker[i].pool_entry_phys);
 902
 903         }
 904
 905         dma_pool_destroy(fusion->reply_frames_desc_pool);
 906         dma_pool_destroy(fusion->reply_frames_desc_pool_align);
 907
 908         if (fusion->rdpq_virt)
 909                 dma_free_coherent(&instance->pdev->dev,
 910                         sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) * MAX_MSIX_QUEUES_FUSION,
 911                         fusion->rdpq_virt, fusion->rdpq_phys);
 912 }
 913
 914 static void
 915 megasas_free_reply_fusion(struct megasas_instance *instance) {
 916
 917         struct fusion_context *fusion;
 918
 919         fusion = instance->ctrl_context;
 920
 921         if (fusion->reply_frames_desc[0])
 922                 dma_pool_free(fusion->reply_frames_desc_pool,
 923                         fusion->reply_frames_desc[0],
 924                         fusion->reply_frames_desc_phys[0]);
 925
 926         dma_pool_destroy(fusion->reply_frames_desc_pool);
 927
 928 }
 929
 930
 931 /**
 932  * megasas_alloc_cmds_fusion -  Allocates the command packets
 933  * @instance:           Adapter soft state
 934  *
 935  *
 936  * Each frame has a 32-bit field called context. This context is used to get
 937  * back the megasas_cmd_fusion from the frame when a frame gets completed
 938  * In this driver, the 32 bit values are the indices into an array cmd_list.
 939  * This array is used only to look up the megasas_cmd_fusion given the context.
 940  * The free commands themselves are maintained in a linked list called cmd_pool.
 941  *
 942  * cmds are formed in the io_request and sg_frame members of the
 943  * megasas_cmd_fusion. The context field is used to get a request descriptor
 944  * and is used as SMID of the cmd.
 945  * SMID value range is from 1 to max_fw_cmds.
 946  */
 947 static int
 948 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 949 {
 950         int i;
 951         struct fusion_context *fusion;
 952         struct megasas_cmd_fusion *cmd;
 953         u32 offset;
 954         dma_addr_t io_req_base_phys;
 955         u8 *io_req_base;
 956
 957
 958         fusion = instance->ctrl_context;
 959
 960         if (megasas_alloc_request_fusion(instance))
 961                 goto fail_exit;
 962
 963         if (instance->is_rdpq) {
 964                 if (megasas_alloc_rdpq_fusion(instance))
 965                         goto fail_exit;
 966         } else
 967                 if (megasas_alloc_reply_fusion(instance))
 968                         goto fail_exit;
 969
 970         if (megasas_alloc_cmdlist_fusion(instance))
 971                 goto fail_exit;
 972
 973         dev_info(&instance->pdev->dev, "Configured max firmware commands: %d\n",
 974                  instance->max_fw_cmds);
 975
 976         /* The first 256 bytes (SMID 0) is not used. Don't add to the cmd list */
 977         io_req_base = fusion->io_request_frames + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 978         io_req_base_phys = fusion->io_request_frames_phys + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 979
 980         /*
 981          * Add all the commands to command pool (fusion->cmd_pool)
 982          */
 983
 984         /* SMID 0 is reserved. Set SMID/index from 1 */
 985         for (i = 0; i < instance->max_mpt_cmds; i++) {
 986                 cmd = fusion->cmd_list[i];
 987                 offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
 988                 memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 989                 cmd->index = i + 1;
 990                 cmd->scmd = NULL;
 991                 cmd->sync_cmd_idx =
 992                 (i >= instance->max_scsi_cmds && i < instance->max_fw_cmds) ?
 993                                 (i - instance->max_scsi_cmds) :
 994                                 (u32)ULONG_MAX; /* Set to Invalid */
 995                 cmd->instance = instance;
 996                 cmd->io_request =
 997                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
 998                   (io_req_base + offset);
 999                 memset(cmd->io_request, 0,
1000                        sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
1001                 cmd->io_request_phys_addr = io_req_base_phys + offset;
1002                 cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
1003         }
1004
1005         if (megasas_create_sg_sense_fusion(instance))
1006                 goto fail_exit;
1007
1008         return 0;
1009
1010 fail_exit:
1011         megasas_free_cmds_fusion(instance);
1012         return -ENOMEM;
1013 }
1014
1015 /**
1016  * wait_and_poll -      Issues a polling command
1017  * @instance:                   Adapter soft state
1018  * @cmd:                        Command packet to be issued
1019  *
1020  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
1021  */
1022 int
1023 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
1024         int seconds)
1025 {
1026         int i;
1027         struct megasas_header *frame_hdr = &cmd->frame->hdr;
1028         u32 status_reg;
1029
1030         u32 msecs = seconds * 1000;
1031
1032         /*
1033          * Wait for cmd_status to change
1034          */
1035         for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
1036                 rmb();
1037                 msleep(20);
1038                 if (!(i % 5000)) {
1039                         status_reg = instance->instancet->read_fw_status_reg(instance)
1040                                         & MFI_STATE_MASK;
1041                         if (status_reg == MFI_STATE_FAULT)
1042                                 break;
1043                 }
1044         }
1045
1046         if (frame_hdr->cmd_status == MFI_STAT_INVALID_STATUS)
1047                 return DCMD_TIMEOUT;
1048         else if (frame_hdr->cmd_status == MFI_STAT_OK)
1049                 return DCMD_SUCCESS;
1050         else
1051                 return DCMD_FAILED;
1052 }
1053
1054 /**
1055  * megasas_ioc_init_fusion -    Initializes the FW
1056  * @instance:           Adapter soft state
1057  *
1058  * Issues the IOC Init cmd
1059  */
1060 int
1061 megasas_ioc_init_fusion(struct megasas_instance *instance)
1062 {
1063         struct megasas_init_frame *init_frame;
1064         struct MPI2_IOC_INIT_REQUEST *IOCInitMessage = NULL;
1065         dma_addr_t      ioc_init_handle;
1066         struct megasas_cmd *cmd;
1067         u8 ret, cur_rdpq_mode;
1068         struct fusion_context *fusion;
1069         union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
1070         int i;
1071         struct megasas_header *frame_hdr;
1072         const char *sys_info;
1073         MFI_CAPABILITIES *drv_ops;
1074         u32 scratch_pad_1;
1075         ktime_t time;
1076         bool cur_fw_64bit_dma_capable;
1077         bool cur_intr_coalescing;
1078
1079         fusion = instance->ctrl_context;
1080
1081         ioc_init_handle = fusion->ioc_init_request_phys;
1082         IOCInitMessage = fusion->ioc_init_request;
1083
1084         cmd = fusion->ioc_init_cmd;
1085
1086         scratch_pad_1 = megasas_readl
1087                 (instance, &instance->reg_set->outbound_scratch_pad_1);
1088
1089         cur_rdpq_mode = (scratch_pad_1 & MR_RDPQ_MODE_OFFSET) ? 1 : 0;
1090
1091         if (instance->adapter_type == INVADER_SERIES) {
1092                 cur_fw_64bit_dma_capable =
1093                         (scratch_pad_1 & MR_CAN_HANDLE_64_BIT_DMA_OFFSET) ? true : false;
1094
1095                 if (instance->consistent_mask_64bit && !cur_fw_64bit_dma_capable) {
1096                         dev_err(&instance->pdev->dev, "Driver was operating on 64bit "
1097                                 "DMA mask, but upcoming FW does not support 64bit DMA mask\n");
1098                         megaraid_sas_kill_hba(instance);
1099                         ret = 1;
1100                         goto fail_fw_init;
1101                 }
1102         }
1103
1104         if (instance->is_rdpq && !cur_rdpq_mode) {
1105                 dev_err(&instance->pdev->dev, "Firmware downgrade *NOT SUPPORTED*"
1106                         " from RDPQ mode to non RDPQ mode\n");
1107                 ret = 1;
1108                 goto fail_fw_init;
1109         }
1110
1111         cur_intr_coalescing = (scratch_pad_1 & MR_INTR_COALESCING_SUPPORT_OFFSET) ?
1112                                                         true : false;
1113
1114         if ((instance->low_latency_index_start ==
1115                 MR_HIGH_IOPS_QUEUE_COUNT) && cur_intr_coalescing)
1116                 instance->perf_mode = MR_BALANCED_PERF_MODE;
1117
1118         dev_info(&instance->pdev->dev, "Performance mode :%s\n",
1119                 MEGASAS_PERF_MODE_2STR(instance->perf_mode));
1120
1121         instance->fw_sync_cache_support = (scratch_pad_1 &
1122                 MR_CAN_HANDLE_SYNC_CACHE_OFFSET) ? 1 : 0;
1123         dev_info(&instance->pdev->dev, "FW supports sync cache\t: %s\n",
1124                  instance->fw_sync_cache_support ? "Yes" : "No");
1125
1126         memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
1127
1128         IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
1129         IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
1130         IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION);
1131         IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
1132         IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4);
1133
1134         IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth);
1135         IOCInitMessage->ReplyDescriptorPostQueueAddress = instance->is_rdpq ?
1136                         cpu_to_le64(fusion->rdpq_phys) :
1137                         cpu_to_le64(fusion->reply_frames_desc_phys[0]);
1138         IOCInitMessage->MsgFlags = instance->is_rdpq ?
1139                         MPI2_IOCINIT_MSGFLAG_RDPQ_ARRAY_MODE : 0;
1140         IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys);
1141         IOCInitMessage->SenseBufferAddressHigh = cpu_to_le32(upper_32_bits(fusion->sense_phys_addr));
1142         IOCInitMessage->HostMSIxVectors = instance->msix_vectors;
1143         IOCInitMessage->HostPageSize = MR_DEFAULT_NVME_PAGE_SHIFT;
1144
1145         time = ktime_get_real();
1146         /* Convert to milliseconds as per FW requirement */
1147         IOCInitMessage->TimeStamp = cpu_to_le64(ktime_to_ms(time));
1148
1149         init_frame = (struct megasas_init_frame *)cmd->frame;
1150         memset(init_frame, 0, IOC_INIT_FRAME_SIZE);
1151
1152         frame_hdr = &cmd->frame->hdr;
1153         frame_hdr->cmd_status = 0xFF;
1154         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
1155
1156         init_frame->cmd = MFI_CMD_INIT;
1157         init_frame->cmd_status = 0xFF;
1158
1159         drv_ops = (MFI_CAPABILITIES *) &(init_frame->driver_operations);
1160
1161         /* driver support Extended MSIX */
1162         if (instance->adapter_type >= INVADER_SERIES)
1163                 drv_ops->mfi_capabilities.support_additional_msix = 1;
1164         /* driver supports HA / Remote LUN over Fast Path interface */
1165         drv_ops->mfi_capabilities.support_fp_remote_lun = 1;
1166
1167         drv_ops->mfi_capabilities.support_max_255lds = 1;
1168         drv_ops->mfi_capabilities.support_ndrive_r1_lb = 1;
1169         drv_ops->mfi_capabilities.security_protocol_cmds_fw = 1;
1170
1171         if (instance->max_chain_frame_sz > MEGASAS_CHAIN_FRAME_SZ_MIN)
1172                 drv_ops->mfi_capabilities.support_ext_io_size = 1;
1173
1174         drv_ops->mfi_capabilities.support_fp_rlbypass = 1;
1175         if (!dual_qdepth_disable)
1176                 drv_ops->mfi_capabilities.support_ext_queue_depth = 1;
1177
1178         drv_ops->mfi_capabilities.support_qd_throttling = 1;
1179         drv_ops->mfi_capabilities.support_pd_map_target_id = 1;
1180         drv_ops->mfi_capabilities.support_nvme_passthru = 1;
1181         drv_ops->mfi_capabilities.support_fw_exposed_dev_list = 1;
1182
1183         if (instance->consistent_mask_64bit)
1184                 drv_ops->mfi_capabilities.support_64bit_mode = 1;
1185
1186         /* Convert capability to LE32 */
1187         cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
1188
1189         sys_info = dmi_get_system_info(DMI_PRODUCT_UUID);
1190         if (instance->system_info_buf && sys_info) {
1191                 memcpy(instance->system_info_buf->systemId, sys_info,
1192                         strlen(sys_info) > 64 ? 64 : strlen(sys_info));
1193                 instance->system_info_buf->systemIdLength =
1194                         strlen(sys_info) > 64 ? 64 : strlen(sys_info);
1195                 init_frame->system_info_lo = cpu_to_le32(lower_32_bits(instance->system_info_h));
1196                 init_frame->system_info_hi = cpu_to_le32(upper_32_bits(instance->system_info_h));
1197         }
1198
1199         init_frame->queue_info_new_phys_addr_hi =
1200                 cpu_to_le32(upper_32_bits(ioc_init_handle));
1201         init_frame->queue_info_new_phys_addr_lo =
1202                 cpu_to_le32(lower_32_bits(ioc_init_handle));
1203         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
1204
1205         /*
1206          * Each bit in replyqueue_mask represents one group of MSI-x vectors
1207          * (each group has 8 vectors)
1208          */
1209         switch (instance->perf_mode) {
1210         case MR_BALANCED_PERF_MODE:
1211                 init_frame->replyqueue_mask =
1212                        cpu_to_le16(~(~0 << instance->low_latency_index_start/8));
1213                 break;
1214         case MR_IOPS_PERF_MODE:
1215                 init_frame->replyqueue_mask =
1216                        cpu_to_le16(~(~0 << instance->msix_vectors/8));
1217                 break;
1218         }
1219
1220
1221         req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr));
1222         req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr));
1223         req_desc.MFAIo.RequestFlags =
1224                 (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
1225                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1226
1227         /*
1228          * disable the intr before firing the init frame
1229          */
1230         instance->instancet->disable_intr(instance);
1231
1232         for (i = 0; i < (10 * 1000); i += 20) {
1233                 if (megasas_readl(instance, &instance->reg_set->doorbell) & 1)
1234                         msleep(20);
1235                 else
1236                         break;
1237         }
1238
1239         /* For AERO also, IOC_INIT requires 64 bit descriptor write */
1240         megasas_write_64bit_req_desc(instance, &req_desc);
1241
1242         wait_and_poll(instance, cmd, MFI_IO_TIMEOUT_SECS);
1243
1244         frame_hdr = &cmd->frame->hdr;
1245         if (frame_hdr->cmd_status != 0) {
1246                 ret = 1;
1247                 goto fail_fw_init;
1248         }
1249
1250         if (instance->adapter_type >= AERO_SERIES) {
1251                 scratch_pad_1 = megasas_readl
1252                         (instance, &instance->reg_set->outbound_scratch_pad_1);
1253
1254                 instance->atomic_desc_support =
1255                         (scratch_pad_1 & MR_ATOMIC_DESCRIPTOR_SUPPORT_OFFSET) ? 1 : 0;
1256
1257                 dev_info(&instance->pdev->dev, "FW supports atomic descriptor\t: %s\n",
1258                         instance->atomic_desc_support ? "Yes" : "No");
1259         }
1260
1261         return 0;
1262
1263 fail_fw_init:
1264         dev_err(&instance->pdev->dev,
1265                 "Init cmd return status FAILED for SCSI host %d\n",
1266                 instance->host->host_no);
1267
1268         return ret;
1269 }
1270
1271 /**
1272  * megasas_sync_pd_seq_num -    JBOD SEQ MAP
1273  * @instance:           Adapter soft state
1274  * @pend:               set to 1, if it is pended jbod map.
1275  *
1276  * Issue Jbod map to the firmware. If it is pended command,
1277  * issue command and return. If it is first instance of jbod map
1278  * issue and receive command.
1279  */
1280 int
1281 megasas_sync_pd_seq_num(struct megasas_instance *instance, bool pend) {
1282         int ret = 0;
1283         size_t pd_seq_map_sz;
1284         struct megasas_cmd *cmd;
1285         struct megasas_dcmd_frame *dcmd;
1286         struct fusion_context *fusion = instance->ctrl_context;
1287         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
1288         dma_addr_t pd_seq_h;
1289
1290         pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id & 1)];
1291         pd_seq_h = fusion->pd_seq_phys[(instance->pd_seq_map_id & 1)];
1292         pd_seq_map_sz = struct_size(pd_sync, seq, MAX_PHYSICAL_DEVICES - 1);
1293
1294         cmd = megasas_get_cmd(instance);
1295         if (!cmd) {
1296                 dev_err(&instance->pdev->dev,
1297                         "Could not get mfi cmd. Fail from %s %d\n",
1298                         __func__, __LINE__);
1299                 return -ENOMEM;
1300         }
1301
1302         dcmd = &cmd->frame->dcmd;
1303
1304         memset(pd_sync, 0, pd_seq_map_sz);
1305         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1306
1307         if (pend) {
1308                 dcmd->mbox.b[0] = MEGASAS_DCMD_MBOX_PEND_FLAG;
1309                 dcmd->flags = MFI_FRAME_DIR_WRITE;
1310                 instance->jbod_seq_cmd = cmd;
1311         } else {
1312                 dcmd->flags = MFI_FRAME_DIR_READ;
1313         }
1314
1315         dcmd->cmd = MFI_CMD_DCMD;
1316         dcmd->cmd_status = 0xFF;
1317         dcmd->sge_count = 1;
1318         dcmd->timeout = 0;
1319         dcmd->pad_0 = 0;
1320         dcmd->data_xfer_len = cpu_to_le32(pd_seq_map_sz);
1321         dcmd->opcode = cpu_to_le32(MR_DCMD_SYSTEM_PD_MAP_GET_INFO);
1322
1323         megasas_set_dma_settings(instance, dcmd, pd_seq_h, pd_seq_map_sz);
1324
1325         if (pend) {
1326                 instance->instancet->issue_dcmd(instance, cmd);
1327                 return 0;
1328         }
1329
1330         /* Below code is only for non pended DCMD */
1331         if (!instance->mask_interrupts)
1332                 ret = megasas_issue_blocked_cmd(instance, cmd,
1333                         MFI_IO_TIMEOUT_SECS);
1334         else
1335                 ret = megasas_issue_polled(instance, cmd);
1336
1337         if (le32_to_cpu(pd_sync->count) > MAX_PHYSICAL_DEVICES) {
1338                 dev_warn(&instance->pdev->dev,
1339                         "driver supports max %d JBOD, but FW reports %d\n",
1340                         MAX_PHYSICAL_DEVICES, le32_to_cpu(pd_sync->count));
1341                 ret = -EINVAL;
1342         }
1343
1344         if (ret == DCMD_TIMEOUT)
1345                 dev_warn(&instance->pdev->dev,
1346                          "%s DCMD timed out, continue without JBOD sequence map\n",
1347                          __func__);
1348
1349         if (ret == DCMD_SUCCESS)
1350                 instance->pd_seq_map_id++;
1351
1352         megasas_return_cmd(instance, cmd);
1353         return ret;
1354 }
1355
1356 /*
1357  * megasas_get_ld_map_info -    Returns FW's ld_map structure
1358  * @instance:                           Adapter soft state
1359  * @pend:                               Pend the command or not
1360  * Issues an internal command (DCMD) to get the FW's controller PD
1361  * list structure.  This information is mainly used to find out SYSTEM
1362  * supported by the FW.
1363  * dcmd.mbox value setting for MR_DCMD_LD_MAP_GET_INFO
1364  * dcmd.mbox.b[0]       - number of LDs being sync'd
1365  * dcmd.mbox.b[1]       - 0 - complete command immediately.
1366  *                      - 1 - pend till config change
1367  * dcmd.mbox.b[2]       - 0 - supports max 64 lds and uses legacy MR_FW_RAID_MAP
1368  *                      - 1 - supports max MAX_LOGICAL_DRIVES_EXT lds and
1369  *                              uses extended struct MR_FW_RAID_MAP_EXT
1370  */
1371 static int
1372 megasas_get_ld_map_info(struct megasas_instance *instance)
1373 {
1374         int ret = 0;
1375         struct megasas_cmd *cmd;
1376         struct megasas_dcmd_frame *dcmd;
1377         void *ci;
1378         dma_addr_t ci_h = 0;
1379         u32 size_map_info;
1380         struct fusion_context *fusion;
1381
1382         cmd = megasas_get_cmd(instance);
1383
1384         if (!cmd) {
1385                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for map info\n");
1386                 return -ENOMEM;
1387         }
1388
1389         fusion = instance->ctrl_context;
1390
1391         if (!fusion) {
1392                 megasas_return_cmd(instance, cmd);
1393                 return -ENXIO;
1394         }
1395
1396         dcmd = &cmd->frame->dcmd;
1397
1398         size_map_info = fusion->current_map_sz;
1399
1400         ci = (void *) fusion->ld_map[(instance->map_id & 1)];
1401         ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
1402
1403         if (!ci) {
1404                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to alloc mem for ld_map_info\n");
1405                 megasas_return_cmd(instance, cmd);
1406                 return -ENOMEM;
1407         }
1408
1409         memset(ci, 0, fusion->max_map_sz);
1410         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1411         dcmd->cmd = MFI_CMD_DCMD;
1412         dcmd->cmd_status = 0xFF;
1413         dcmd->sge_count = 1;
1414         dcmd->flags = MFI_FRAME_DIR_READ;
1415         dcmd->timeout = 0;
1416         dcmd->pad_0 = 0;
1417         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
1418         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
1419
1420         megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
1421
1422         if (!instance->mask_interrupts)
1423                 ret = megasas_issue_blocked_cmd(instance, cmd,
1424                         MFI_IO_TIMEOUT_SECS);
1425         else
1426                 ret = megasas_issue_polled(instance, cmd);
1427
1428         if (ret == DCMD_TIMEOUT)
1429                 dev_warn(&instance->pdev->dev,
1430                          "%s DCMD timed out, RAID map is disabled\n",
1431                          __func__);
1432
1433         megasas_return_cmd(instance, cmd);
1434
1435         return ret;
1436 }
1437
1438 u8
1439 megasas_get_map_info(struct megasas_instance *instance)
1440 {
1441         struct fusion_context *fusion = instance->ctrl_context;
1442
1443         fusion->fast_path_io = 0;
1444         if (!megasas_get_ld_map_info(instance)) {
1445                 if (MR_ValidateMapInfo(instance, instance->map_id)) {
1446                         fusion->fast_path_io = 1;
1447                         return 0;
1448                 }
1449         }
1450         return 1;
1451 }
1452
1453 /*
1454  * megasas_sync_map_info -      Returns FW's ld_map structure
1455  * @instance:                           Adapter soft state
1456  *
1457  * Issues an internal command (DCMD) to get the FW's controller PD
1458  * list structure.  This information is mainly used to find out SYSTEM
1459  * supported by the FW.
1460  */
1461 int
1462 megasas_sync_map_info(struct megasas_instance *instance)
1463 {
1464         int i;
1465         struct megasas_cmd *cmd;
1466         struct megasas_dcmd_frame *dcmd;
1467         u16 num_lds;
1468         struct fusion_context *fusion;
1469         struct MR_LD_TARGET_SYNC *ci = NULL;
1470         struct MR_DRV_RAID_MAP_ALL *map;
1471         struct MR_LD_RAID  *raid;
1472         struct MR_LD_TARGET_SYNC *ld_sync;
1473         dma_addr_t ci_h = 0;
1474         u32 size_map_info;
1475
1476         cmd = megasas_get_cmd(instance);
1477
1478         if (!cmd) {
1479                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for sync info\n");
1480                 return -ENOMEM;
1481         }
1482
1483         fusion = instance->ctrl_context;
1484
1485         if (!fusion) {
1486                 megasas_return_cmd(instance, cmd);
1487                 return 1;
1488         }
1489
1490         map = fusion->ld_drv_map[instance->map_id & 1];
1491
1492         num_lds = le16_to_cpu(map->raidMap.ldCount);
1493
1494         dcmd = &cmd->frame->dcmd;
1495
1496         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1497
1498         ci = (struct MR_LD_TARGET_SYNC *)
1499           fusion->ld_map[(instance->map_id - 1) & 1];
1500         memset(ci, 0, fusion->max_map_sz);
1501
1502         ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
1503
1504         ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
1505
1506         for (i = 0; i < num_lds; i++, ld_sync++) {
1507                 raid = MR_LdRaidGet(i, map);
1508                 ld_sync->targetId = MR_GetLDTgtId(i, map);
1509                 ld_sync->seqNum = raid->seqNum;
1510         }
1511
1512         size_map_info = fusion->current_map_sz;
1513
1514         dcmd->cmd = MFI_CMD_DCMD;
1515         dcmd->cmd_status = 0xFF;
1516         dcmd->sge_count = 1;
1517         dcmd->flags = MFI_FRAME_DIR_WRITE;
1518         dcmd->timeout = 0;
1519         dcmd->pad_0 = 0;
1520         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
1521         dcmd->mbox.b[0] = num_lds;
1522         dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
1523         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
1524
1525         megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
1526
1527         instance->map_update_cmd = cmd;
1528
1529         instance->instancet->issue_dcmd(instance, cmd);
1530
1531         return 0;
1532 }
1533
1534 /*
1535  * meagasas_display_intel_branding - Display branding string
1536  * @instance: per adapter object
1537  *
1538  * Return nothing.
1539  */
1540 static void
1541 megasas_display_intel_branding(struct megasas_instance *instance)
1542 {
1543         if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL)
1544                 return;
1545
1546         switch (instance->pdev->device) {
1547         case PCI_DEVICE_ID_LSI_INVADER:
1548                 switch (instance->pdev->subsystem_device) {
1549                 case MEGARAID_INTEL_RS3DC080_SSDID:
1550                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1551                                 instance->host->host_no,
1552                                 MEGARAID_INTEL_RS3DC080_BRANDING);
1553                         break;
1554                 case MEGARAID_INTEL_RS3DC040_SSDID:
1555                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1556                                 instance->host->host_no,
1557                                 MEGARAID_INTEL_RS3DC040_BRANDING);
1558                         break;
1559                 case MEGARAID_INTEL_RS3SC008_SSDID:
1560                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1561                                 instance->host->host_no,
1562                                 MEGARAID_INTEL_RS3SC008_BRANDING);
1563                         break;
1564                 case MEGARAID_INTEL_RS3MC044_SSDID:
1565                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1566                                 instance->host->host_no,
1567                                 MEGARAID_INTEL_RS3MC044_BRANDING);
1568                         break;
1569                 default:
1570                         break;
1571                 }
1572                 break;
1573         case PCI_DEVICE_ID_LSI_FURY:
1574                 switch (instance->pdev->subsystem_device) {
1575                 case MEGARAID_INTEL_RS3WC080_SSDID:
1576                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1577                                 instance->host->host_no,
1578                                 MEGARAID_INTEL_RS3WC080_BRANDING);
1579                         break;
1580                 case MEGARAID_INTEL_RS3WC040_SSDID:
1581                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1582                                 instance->host->host_no,
1583                                 MEGARAID_INTEL_RS3WC040_BRANDING);
1584                         break;
1585                 default:
1586                         break;
1587                 }
1588                 break;
1589         case PCI_DEVICE_ID_LSI_CUTLASS_52:
1590         case PCI_DEVICE_ID_LSI_CUTLASS_53:
1591                 switch (instance->pdev->subsystem_device) {
1592                 case MEGARAID_INTEL_RMS3BC160_SSDID:
1593                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1594                                 instance->host->host_no,
1595                                 MEGARAID_INTEL_RMS3BC160_BRANDING);
1596                         break;
1597                 default:
1598                         break;
1599                 }
1600                 break;
1601         default:
1602                 break;
1603         }
1604 }
1605
1606 /**
1607  * megasas_allocate_raid_maps - Allocate memory for RAID maps
1608  * @instance:                           Adapter soft state
1609  *
1610  * return:                              if success: return 0
1611  *                                      failed:  return -ENOMEM
1612  */
1613 static inline int megasas_allocate_raid_maps(struct megasas_instance *instance)
1614 {
1615         struct fusion_context *fusion;
1616         int i = 0;
1617
1618         fusion = instance->ctrl_context;
1619
1620         fusion->drv_map_pages = get_order(fusion->drv_map_sz);
1621
1622         for (i = 0; i < 2; i++) {
1623                 fusion->ld_map[i] = NULL;
1624
1625                 fusion->ld_drv_map[i] = (void *)
1626                         __get_free_pages(__GFP_ZERO | GFP_KERNEL,
1627                                          fusion->drv_map_pages);
1628
1629                 if (!fusion->ld_drv_map[i]) {
1630                         fusion->ld_drv_map[i] = vzalloc(fusion->drv_map_sz);
1631
1632                         if (!fusion->ld_drv_map[i]) {
1633                                 dev_err(&instance->pdev->dev,
1634                                         "Could not allocate memory for local map"
1635                                         " size requested: %d\n",
1636                                         fusion->drv_map_sz);
1637                                 goto ld_drv_map_alloc_fail;
1638                         }
1639                 }
1640         }
1641
1642         for (i = 0; i < 2; i++) {
1643                 fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
1644                                                        fusion->max_map_sz,
1645                                                        &fusion->ld_map_phys[i],
1646                                                        GFP_KERNEL);
1647                 if (!fusion->ld_map[i]) {
1648                         dev_err(&instance->pdev->dev,
1649                                 "Could not allocate memory for map info %s:%d\n",
1650                                 __func__, __LINE__);
1651                         goto ld_map_alloc_fail;
1652                 }
1653         }
1654
1655         return 0;
1656
1657 ld_map_alloc_fail:
1658         for (i = 0; i < 2; i++) {
1659                 if (fusion->ld_map[i])
1660                         dma_free_coherent(&instance->pdev->dev,
1661                                           fusion->max_map_sz,
1662                                           fusion->ld_map[i],
1663                                           fusion->ld_map_phys[i]);
1664         }
1665
1666 ld_drv_map_alloc_fail:
1667         for (i = 0; i < 2; i++) {
1668                 if (fusion->ld_drv_map[i]) {
1669                         if (is_vmalloc_addr(fusion->ld_drv_map[i]))
1670                                 vfree(fusion->ld_drv_map[i]);
1671                         else
1672                                 free_pages((ulong)fusion->ld_drv_map[i],
1673                                            fusion->drv_map_pages);
1674                 }
1675         }
1676
1677         return -ENOMEM;
1678 }
1679
1680 /**
1681  * megasas_configure_queue_sizes -      Calculate size of request desc queue,
1682  *                                      reply desc queue,
1683  *                                      IO request frame queue, set can_queue.
1684  * @instance:                           Adapter soft state
1685  * @return:                             void
1686  */
1687 static inline
1688 void megasas_configure_queue_sizes(struct megasas_instance *instance)
1689 {
1690         struct fusion_context *fusion;
1691         u16 max_cmd;
1692
1693         fusion = instance->ctrl_context;
1694         max_cmd = instance->max_fw_cmds;
1695
1696         if (instance->adapter_type >= VENTURA_SERIES)
1697                 instance->max_mpt_cmds = instance->max_fw_cmds * RAID_1_PEER_CMDS;
1698         else
1699                 instance->max_mpt_cmds = instance->max_fw_cmds;
1700
1701         instance->max_scsi_cmds = instance->max_fw_cmds - instance->max_mfi_cmds;
1702         instance->cur_can_queue = instance->max_scsi_cmds;
1703         instance->host->can_queue = instance->cur_can_queue;
1704
1705         fusion->reply_q_depth = 2 * ((max_cmd + 1 + 15) / 16) * 16;
1706
1707         fusion->request_alloc_sz = sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *
1708                                           instance->max_mpt_cmds;
1709         fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION) *
1710                                         (fusion->reply_q_depth);
1711         fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
1712                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
1713                  * (instance->max_mpt_cmds + 1)); /* Extra 1 for SMID 0 */
1714 }
1715
1716 static int megasas_alloc_ioc_init_frame(struct megasas_instance *instance)
1717 {
1718         struct fusion_context *fusion;
1719         struct megasas_cmd *cmd;
1720
1721         fusion = instance->ctrl_context;
1722
1723         cmd = kzalloc(sizeof(struct megasas_cmd), GFP_KERNEL);
1724
1725         if (!cmd) {
1726                 dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
1727                         __func__, __LINE__);
1728                 return -ENOMEM;
1729         }
1730
1731         cmd->frame = dma_alloc_coherent(&instance->pdev->dev,
1732                                         IOC_INIT_FRAME_SIZE,
1733                                         &cmd->frame_phys_addr, GFP_KERNEL);
1734
1735         if (!cmd->frame) {
1736                 dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
1737                         __func__, __LINE__);
1738                 kfree(cmd);
1739                 return -ENOMEM;
1740         }
1741
1742         fusion->ioc_init_cmd = cmd;
1743         return 0;
1744 }
1745
1746 /**
1747  * megasas_free_ioc_init_cmd -  Free IOC INIT command frame
1748  * @instance:           Adapter soft state
1749  */
1750 static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance)
1751 {
1752         struct fusion_context *fusion;
1753
1754         fusion = instance->ctrl_context;
1755
1756         if (fusion->ioc_init_cmd && fusion->ioc_init_cmd->frame)
1757                 dma_free_coherent(&instance->pdev->dev,
1758                                   IOC_INIT_FRAME_SIZE,
1759                                   fusion->ioc_init_cmd->frame,
1760                                   fusion->ioc_init_cmd->frame_phys_addr);
1761
1762         kfree(fusion->ioc_init_cmd);
1763 }
1764
1765 /**
1766  * megasas_init_adapter_fusion -        Initializes the FW
1767  * @instance:           Adapter soft state
1768  *
1769  * This is the main function for initializing firmware.
1770  */
1771 static u32
1772 megasas_init_adapter_fusion(struct megasas_instance *instance)
1773 {
1774         struct fusion_context *fusion;
1775         u32 scratch_pad_1;
1776         int i = 0, count;
1777         u32 status_reg;
1778
1779         fusion = instance->ctrl_context;
1780
1781         megasas_fusion_update_can_queue(instance, PROBE_CONTEXT);
1782
1783         /*
1784          * Only Driver's internal DCMDs and IOCTL DCMDs needs to have MFI frames
1785          */
1786         instance->max_mfi_cmds =
1787                 MEGASAS_FUSION_INTERNAL_CMDS + MEGASAS_FUSION_IOCTL_CMDS;
1788
1789         megasas_configure_queue_sizes(instance);
1790
1791         scratch_pad_1 = megasas_readl(instance,
1792                                       &instance->reg_set->outbound_scratch_pad_1);
1793         /* If scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK is set,
1794          * Firmware support extended IO chain frame which is 4 times more than
1795          * legacy Firmware.
1796          * Legacy Firmware - Frame size is (8 * 128) = 1K
1797          * 1M IO Firmware  - Frame size is (8 * 128 * 4)  = 4K
1798          */
1799         if (scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK)
1800                 instance->max_chain_frame_sz =
1801                         ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
1802                         MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_1MB_IO;
1803         else
1804                 instance->max_chain_frame_sz =
1805                         ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
1806                         MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_256K_IO;
1807
1808         if (instance->max_chain_frame_sz < MEGASAS_CHAIN_FRAME_SZ_MIN) {
1809                 dev_warn(&instance->pdev->dev, "frame size %d invalid, fall back to legacy max frame size %d\n",
1810                         instance->max_chain_frame_sz,
1811                         MEGASAS_CHAIN_FRAME_SZ_MIN);
1812                 instance->max_chain_frame_sz = MEGASAS_CHAIN_FRAME_SZ_MIN;
1813         }
1814
1815         fusion->max_sge_in_main_msg =
1816                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
1817                         - offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
1818
1819         fusion->max_sge_in_chain =
1820                 instance->max_chain_frame_sz
1821                         / sizeof(union MPI2_SGE_IO_UNION);
1822
1823         instance->max_num_sge =
1824                 rounddown_pow_of_two(fusion->max_sge_in_main_msg
1825                         + fusion->max_sge_in_chain - 2);
1826
1827         /* Used for pass thru MFI frame (DCMD) */
1828         fusion->chain_offset_mfi_pthru =
1829                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
1830
1831         fusion->chain_offset_io_request =
1832                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
1833                  sizeof(union MPI2_SGE_IO_UNION))/16;
1834
1835         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
1836         for (i = 0 ; i < count; i++)
1837                 fusion->last_reply_idx[i] = 0;
1838
1839         /*
1840          * For fusion adapters, 3 commands for IOCTL and 8 commands
1841          * for driver's internal DCMDs.
1842          */
1843         instance->max_scsi_cmds = instance->max_fw_cmds -
1844                                 (MEGASAS_FUSION_INTERNAL_CMDS +
1845                                 MEGASAS_FUSION_IOCTL_CMDS);
1846         sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS);
1847
1848         if (megasas_alloc_ioc_init_frame(instance))
1849                 return 1;
1850
1851         /*
1852          * Allocate memory for descriptors
1853          * Create a pool of commands
1854          */
1855         if (megasas_alloc_cmds(instance))
1856                 goto fail_alloc_mfi_cmds;
1857         if (megasas_alloc_cmds_fusion(instance))
1858                 goto fail_alloc_cmds;
1859
1860         if (megasas_ioc_init_fusion(instance)) {
1861                 status_reg = instance->instancet->read_fw_status_reg(instance);
1862                 if (((status_reg & MFI_STATE_MASK) == MFI_STATE_FAULT) &&
1863                     (status_reg & MFI_RESET_ADAPTER)) {
1864                         /* Do a chip reset and then retry IOC INIT once */
1865                         if (megasas_adp_reset_wait_for_ready
1866                                 (instance, true, 0) == FAILED)
1867                                 goto fail_ioc_init;
1868
1869                         if (megasas_ioc_init_fusion(instance))
1870                                 goto fail_ioc_init;
1871                 } else {
1872                         goto fail_ioc_init;
1873                 }
1874         }
1875
1876         megasas_display_intel_branding(instance);
1877         if (megasas_get_ctrl_info(instance)) {
1878                 dev_err(&instance->pdev->dev,
1879                         "Could not get controller info. Fail from %s %d\n",
1880                         __func__, __LINE__);
1881                 goto fail_ioc_init;
1882         }
1883
1884         instance->flag_ieee = 1;
1885         instance->r1_ldio_hint_default =  MR_R1_LDIO_PIGGYBACK_DEFAULT;
1886         instance->threshold_reply_count = instance->max_fw_cmds / 4;
1887         fusion->fast_path_io = 0;
1888
1889         if (megasas_allocate_raid_maps(instance))
1890                 goto fail_ioc_init;
1891
1892         if (!megasas_get_map_info(instance))
1893                 megasas_sync_map_info(instance);
1894
1895         return 0;
1896
1897 fail_ioc_init:
1898         megasas_free_cmds_fusion(instance);
1899 fail_alloc_cmds:
1900         megasas_free_cmds(instance);
1901 fail_alloc_mfi_cmds:
1902         megasas_free_ioc_init_cmd(instance);
1903         return 1;
1904 }
1905
1906 /**
1907  * megasas_fault_detect_work    -       Worker function of
1908  *                                      FW fault handling workqueue.
1909  */
1910 static void
1911 megasas_fault_detect_work(struct work_struct *work)
1912 {
1913         struct megasas_instance *instance =
1914                 container_of(work, struct megasas_instance,
1915                              fw_fault_work.work);
1916         u32 fw_state, dma_state, status;
1917
1918         /* Check the fw state */
1919         fw_state = instance->instancet->read_fw_status_reg(instance) &
1920                         MFI_STATE_MASK;
1921
1922         if (fw_state == MFI_STATE_FAULT) {
1923                 dma_state = instance->instancet->read_fw_status_reg(instance) &
1924                                 MFI_STATE_DMADONE;
1925                 /* Start collecting crash, if DMA bit is done */
1926                 if (instance->crash_dump_drv_support &&
1927                     instance->crash_dump_app_support && dma_state) {
1928                         megasas_fusion_crash_dump(instance);
1929                 } else {
1930                         if (instance->unload == 0) {
1931                                 status = megasas_reset_fusion(instance->host, 0);
1932                                 if (status != SUCCESS) {
1933                                         dev_err(&instance->pdev->dev,
1934                                                 "Failed from %s %d, do not re-arm timer\n",
1935                                                 __func__, __LINE__);
1936                                         return;
1937                                 }
1938                         }
1939                 }
1940         }
1941
1942         if (instance->fw_fault_work_q)
1943                 queue_delayed_work(instance->fw_fault_work_q,
1944                         &instance->fw_fault_work,
1945                         msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
1946 }
1947
1948 int
1949 megasas_fusion_start_watchdog(struct megasas_instance *instance)
1950 {
1951         /* Check if the Fault WQ is already started */
1952         if (instance->fw_fault_work_q)
1953                 return SUCCESS;
1954
1955         INIT_DELAYED_WORK(&instance->fw_fault_work, megasas_fault_detect_work);
1956
1957         snprintf(instance->fault_handler_work_q_name,
1958                  sizeof(instance->fault_handler_work_q_name),
1959                  "poll_megasas%d_status", instance->host->host_no);
1960
1961         instance->fw_fault_work_q =
1962                 create_singlethread_workqueue(instance->fault_handler_work_q_name);
1963         if (!instance->fw_fault_work_q) {
1964                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
1965                         __func__, __LINE__);
1966                 return FAILED;
1967         }
1968
1969         queue_delayed_work(instance->fw_fault_work_q,
1970                            &instance->fw_fault_work,
1971                            msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
1972
1973         return SUCCESS;
1974 }
1975
1976 void
1977 megasas_fusion_stop_watchdog(struct megasas_instance *instance)
1978 {
1979         struct workqueue_struct *wq;
1980
1981         if (instance->fw_fault_work_q) {
1982                 wq = instance->fw_fault_work_q;
1983                 instance->fw_fault_work_q = NULL;
1984                 if (!cancel_delayed_work_sync(&instance->fw_fault_work))
1985                         flush_workqueue(wq);
1986                 destroy_workqueue(wq);
1987         }
1988 }
1989
1990 /**
1991  * map_cmd_status -     Maps FW cmd status to OS cmd status
1992  * @cmd :               Pointer to cmd
1993  * @status :            status of cmd returned by FW
1994  * @ext_status :        ext status of cmd returned by FW
1995  */
1996
1997 static void
1998 map_cmd_status(struct fusion_context *fusion,
1999                 struct scsi_cmnd *scmd, u8 status, u8 ext_status,
2000                 u32 data_length, u8 *sense)
2001 {
2002         u8 cmd_type;
2003         int resid;
2004
2005         cmd_type = megasas_cmd_type(scmd);
2006         switch (status) {
2007
2008         case MFI_STAT_OK:
2009                 scmd->result = DID_OK << 16;
2010                 break;
2011
2012         case MFI_STAT_SCSI_IO_FAILED:
2013         case MFI_STAT_LD_INIT_IN_PROGRESS:
2014                 scmd->result = (DID_ERROR << 16) | ext_status;
2015                 break;
2016
2017         case MFI_STAT_SCSI_DONE_WITH_ERROR:
2018
2019                 scmd->result = (DID_OK << 16) | ext_status;
2020                 if (ext_status == SAM_STAT_CHECK_CONDITION) {
2021                         memset(scmd->sense_buffer, 0,
2022                                SCSI_SENSE_BUFFERSIZE);
2023                         memcpy(scmd->sense_buffer, sense,
2024                                SCSI_SENSE_BUFFERSIZE);
2025                         scmd->result |= DRIVER_SENSE << 24;
2026                 }
2027
2028                 /*
2029                  * If the  IO request is partially completed, then MR FW will
2030                  * update "io_request->DataLength" field with actual number of
2031                  * bytes transferred.Driver will set residual bytes count in
2032                  * SCSI command structure.
2033                  */
2034                 resid = (scsi_bufflen(scmd) - data_length);
2035                 scsi_set_resid(scmd, resid);
2036
2037                 if (resid &&
2038                         ((cmd_type == READ_WRITE_LDIO) ||
2039                         (cmd_type == READ_WRITE_SYSPDIO)))
2040                         scmd_printk(KERN_INFO, scmd, "BRCM Debug mfi stat 0x%x, data len"
2041                                 " requested/completed 0x%x/0x%x\n",
2042                                 status, scsi_bufflen(scmd), data_length);
2043                 break;
2044
2045         case MFI_STAT_LD_OFFLINE:
2046         case MFI_STAT_DEVICE_NOT_FOUND:
2047                 scmd->result = DID_BAD_TARGET << 16;
2048                 break;
2049         case MFI_STAT_CONFIG_SEQ_MISMATCH:
2050                 scmd->result = DID_IMM_RETRY << 16;
2051                 break;
2052         default:
2053                 scmd->result = DID_ERROR << 16;
2054                 break;
2055         }
2056 }
2057
2058 /**
2059  * megasas_is_prp_possible -
2060  * Checks if native NVMe PRPs can be built for the IO
2061  *
2062  * @instance:           Adapter soft state
2063  * @scmd:               SCSI command from the mid-layer
2064  * @sge_count:          scatter gather element count.
2065  *
2066  * Returns:             true: PRPs can be built
2067  *                      false: IEEE SGLs needs to be built
2068  */
2069 static bool
2070 megasas_is_prp_possible(struct megasas_instance *instance,
2071                         struct scsi_cmnd *scmd, int sge_count)
2072 {
2073         int i;
2074         u32 data_length = 0;
2075         struct scatterlist *sg_scmd;
2076         bool build_prp = false;
2077         u32 mr_nvme_pg_size;
2078
2079         mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
2080                                 MR_DEFAULT_NVME_PAGE_SIZE);
2081         data_length = scsi_bufflen(scmd);
2082         sg_scmd = scsi_sglist(scmd);
2083
2084         /*
2085          * NVMe uses one PRP for each page (or part of a page)
2086          * look at the data length - if 4 pages or less then IEEE is OK
2087          * if  > 5 pages then we need to build a native SGL
2088          * if > 4 and <= 5 pages, then check physical address of 1st SG entry
2089          * if this first size in the page is >= the residual beyond 4 pages
2090          * then use IEEE, otherwise use native SGL
2091          */
2092
2093         if (data_length > (mr_nvme_pg_size * 5)) {
2094                 build_prp = true;
2095         } else if ((data_length > (mr_nvme_pg_size * 4)) &&
2096                         (data_length <= (mr_nvme_pg_size * 5)))  {
2097                 /* check if 1st SG entry size is < residual beyond 4 pages */
2098                 if (sg_dma_len(sg_scmd) < (data_length - (mr_nvme_pg_size * 4)))
2099                         build_prp = true;
2100         }
2101
2102 /*
2103  * Below code detects gaps/holes in IO data buffers.
2104  * What does holes/gaps mean?
2105  * Any SGE except first one in a SGL starts at non NVME page size
2106  * aligned address OR Any SGE except last one in a SGL ends at
2107  * non NVME page size boundary.
2108  *
2109  * Driver has already informed block layer by setting boundary rules for
2110  * bio merging done at NVME page size boundary calling kernel API
2111  * blk_queue_virt_boundary inside slave_config.
2112  * Still there is possibility of IO coming with holes to driver because of
2113  * IO merging done by IO scheduler.
2114  *
2115  * With SCSI BLK MQ enabled, there will be no IO with holes as there is no
2116  * IO scheduling so no IO merging.
2117  *
2118  * With SCSI BLK MQ disabled, IO scheduler may attempt to merge IOs and
2119  * then sending IOs with holes.
2120  *
2121  * Though driver can request block layer to disable IO merging by calling-
2122  * blk_queue_flag_set(QUEUE_FLAG_NOMERGES, sdev->request_queue) but
2123  * user may tune sysfs parameter- nomerges again to 0 or 1.
2124  *
2125  * If in future IO scheduling is enabled with SCSI BLK MQ,
2126  * this algorithm to detect holes will be required in driver
2127  * for SCSI BLK MQ enabled case as well.
2128  *
2129  *
2130  */
2131         scsi_for_each_sg(scmd, sg_scmd, sge_count, i) {
2132                 if ((i != 0) && (i != (sge_count - 1))) {
2133                         if (mega_mod64(sg_dma_len(sg_scmd), mr_nvme_pg_size) ||
2134                             mega_mod64(sg_dma_address(sg_scmd),
2135                                        mr_nvme_pg_size)) {
2136                                 build_prp = false;
2137                                 break;
2138                         }
2139                 }
2140
2141                 if ((sge_count > 1) && (i == 0)) {
2142                         if ((mega_mod64((sg_dma_address(sg_scmd) +
2143                                         sg_dma_len(sg_scmd)),
2144                                         mr_nvme_pg_size))) {
2145                                 build_prp = false;
2146                                 break;
2147                         }
2148                 }
2149
2150                 if ((sge_count > 1) && (i == (sge_count - 1))) {
2151                         if (mega_mod64(sg_dma_address(sg_scmd),
2152                                        mr_nvme_pg_size)) {
2153                                 build_prp = false;
2154                                 break;
2155                         }
2156                 }
2157         }
2158
2159         return build_prp;
2160 }
2161
2162 /**
2163  * megasas_make_prp_nvme -
2164  * Prepare PRPs(Physical Region Page)- SGLs specific to NVMe drives only
2165  *
2166  * @instance:           Adapter soft state
2167  * @scmd:               SCSI command from the mid-layer
2168  * @sgl_ptr:            SGL to be filled in
2169  * @cmd:                Fusion command frame
2170  * @sge_count:          scatter gather element count.
2171  *
2172  * Returns:             true: PRPs are built
2173  *                      false: IEEE SGLs needs to be built
2174  */
2175 static bool
2176 megasas_make_prp_nvme(struct megasas_instance *instance, struct scsi_cmnd *scmd,
2177                       struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
2178                       struct megasas_cmd_fusion *cmd, int sge_count)
2179 {
2180         int sge_len, offset, num_prp_in_chain = 0;
2181         struct MPI25_IEEE_SGE_CHAIN64 *main_chain_element, *ptr_first_sgl;
2182         u64 *ptr_sgl;
2183         dma_addr_t ptr_sgl_phys;
2184         u64 sge_addr;
2185         u32 page_mask, page_mask_result;
2186         struct scatterlist *sg_scmd;
2187         u32 first_prp_len;
2188         bool build_prp = false;
2189         int data_len = scsi_bufflen(scmd);
2190         u32 mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
2191                                         MR_DEFAULT_NVME_PAGE_SIZE);
2192
2193         build_prp = megasas_is_prp_possible(instance, scmd, sge_count);
2194
2195         if (!build_prp)
2196                 return false;
2197
2198         /*
2199          * Nvme has a very convoluted prp format.  One prp is required
2200          * for each page or partial page. Driver need to split up OS sg_list
2201          * entries if it is longer than one page or cross a page
2202          * boundary.  Driver also have to insert a PRP list pointer entry as
2203          * the last entry in each physical page of the PRP list.
2204          *
2205          * NOTE: The first PRP "entry" is actually placed in the first
2206          * SGL entry in the main message as IEEE 64 format.  The 2nd
2207          * entry in the main message is the chain element, and the rest
2208          * of the PRP entries are built in the contiguous pcie buffer.
2209          */
2210         page_mask = mr_nvme_pg_size - 1;
2211         ptr_sgl = (u64 *)cmd->sg_frame;
2212         ptr_sgl_phys = cmd->sg_frame_phys_addr;
2213         memset(ptr_sgl, 0, instance->max_chain_frame_sz);
2214
2215         /* Build chain frame element which holds all prps except first*/
2216         main_chain_element = (struct MPI25_IEEE_SGE_CHAIN64 *)
2217             ((u8 *)sgl_ptr + sizeof(struct MPI25_IEEE_SGE_CHAIN64));
2218
2219         main_chain_element->Address = cpu_to_le64(ptr_sgl_phys);
2220         main_chain_element->NextChainOffset = 0;
2221         main_chain_element->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2222                                         IEEE_SGE_FLAGS_SYSTEM_ADDR |
2223                                         MPI26_IEEE_SGE_FLAGS_NSF_NVME_PRP;
2224
2225         /* Build first prp, sge need not to be page aligned*/
2226         ptr_first_sgl = sgl_ptr;
2227         sg_scmd = scsi_sglist(scmd);
2228         sge_addr = sg_dma_address(sg_scmd);
2229         sge_len = sg_dma_len(sg_scmd);
2230
2231         offset = (u32)(sge_addr & page_mask);
2232         first_prp_len = mr_nvme_pg_size - offset;
2233
2234         ptr_first_sgl->Address = cpu_to_le64(sge_addr);
2235         ptr_first_sgl->Length = cpu_to_le32(first_prp_len);
2236
2237         data_len -= first_prp_len;
2238
2239         if (sge_len > first_prp_len) {
2240                 sge_addr += first_prp_len;
2241                 sge_len -= first_prp_len;
2242         } else if (sge_len == first_prp_len) {
2243                 sg_scmd = sg_next(sg_scmd);
2244                 sge_addr = sg_dma_address(sg_scmd);
2245                 sge_len = sg_dma_len(sg_scmd);
2246         }
2247
2248         for (;;) {
2249                 offset = (u32)(sge_addr & page_mask);
2250
2251                 /* Put PRP pointer due to page boundary*/
2252                 page_mask_result = (uintptr_t)(ptr_sgl + 1) & page_mask;
2253                 if (unlikely(!page_mask_result)) {
2254                         scmd_printk(KERN_NOTICE,
2255                                     scmd, "page boundary ptr_sgl: 0x%p\n",
2256                                     ptr_sgl);
2257                         ptr_sgl_phys += 8;
2258                         *ptr_sgl = cpu_to_le64(ptr_sgl_phys);
2259                         ptr_sgl++;
2260                         num_prp_in_chain++;
2261                 }
2262
2263                 *ptr_sgl = cpu_to_le64(sge_addr);
2264                 ptr_sgl++;
2265                 ptr_sgl_phys += 8;
2266                 num_prp_in_chain++;
2267
2268                 sge_addr += mr_nvme_pg_size;
2269                 sge_len -= mr_nvme_pg_size;
2270                 data_len -= mr_nvme_pg_size;
2271
2272                 if (data_len <= 0)
2273                         break;
2274
2275                 if (sge_len > 0)
2276                         continue;
2277
2278                 sg_scmd = sg_next(sg_scmd);
2279                 sge_addr = sg_dma_address(sg_scmd);
2280                 sge_len = sg_dma_len(sg_scmd);
2281         }
2282
2283         main_chain_element->Length =
2284                         cpu_to_le32(num_prp_in_chain * sizeof(u64));
2285
2286         return build_prp;
2287 }
2288
2289 /**
2290  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
2291  * @instance:           Adapter soft state
2292  * @scp:                SCSI command from the mid-layer
2293  * @sgl_ptr:            SGL to be filled in
2294  * @cmd:                cmd we are working on
2295  * @sge_count           sge count
2296  *
2297  */
2298 static void
2299 megasas_make_sgl_fusion(struct megasas_instance *instance,
2300                         struct scsi_cmnd *scp,
2301                         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
2302                         struct megasas_cmd_fusion *cmd, int sge_count)
2303 {
2304         int i, sg_processed;
2305         struct scatterlist *os_sgl;
2306         struct fusion_context *fusion;
2307
2308         fusion = instance->ctrl_context;
2309
2310         if (instance->adapter_type >= INVADER_SERIES) {
2311                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
2312                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
2313                 sgl_ptr_end->Flags = 0;
2314         }
2315
2316         scsi_for_each_sg(scp, os_sgl, sge_count, i) {
2317                 sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl));
2318                 sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl));
2319                 sgl_ptr->Flags = 0;
2320                 if (instance->adapter_type >= INVADER_SERIES)
2321                         if (i == sge_count - 1)
2322                                 sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
2323                 sgl_ptr++;
2324                 sg_processed = i + 1;
2325
2326                 if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
2327                     (sge_count > fusion->max_sge_in_main_msg)) {
2328
2329                         struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
2330                         if (instance->adapter_type >= INVADER_SERIES) {
2331                                 if ((le16_to_cpu(cmd->io_request->IoFlags) &
2332                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
2333                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
2334                                         cmd->io_request->ChainOffset =
2335                                                 fusion->
2336                                                 chain_offset_io_request;
2337                                 else
2338                                         cmd->io_request->ChainOffset = 0;
2339                         } else
2340                                 cmd->io_request->ChainOffset =
2341                                         fusion->chain_offset_io_request;
2342
2343                         sg_chain = sgl_ptr;
2344                         /* Prepare chain element */
2345                         sg_chain->NextChainOffset = 0;
2346                         if (instance->adapter_type >= INVADER_SERIES)
2347                                 sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
2348                         else
2349                                 sg_chain->Flags =
2350                                         (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2351                                          MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
2352                         sg_chain->Length =  cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed)));
2353                         sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr);
2354
2355                         sgl_ptr =
2356                           (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
2357                         memset(sgl_ptr, 0, instance->max_chain_frame_sz);
2358                 }
2359         }
2360 }
2361
2362 /**
2363  * megasas_make_sgl -   Build Scatter Gather List(SGLs)
2364  * @scp:                SCSI command pointer
2365  * @instance:           Soft instance of controller
2366  * @cmd:                Fusion command pointer
2367  *
2368  * This function will build sgls based on device type.
2369  * For nvme drives, there is different way of building sgls in nvme native
2370  * format- PRPs(Physical Region Page).
2371  *
2372  * Returns the number of sg lists actually used, zero if the sg lists
2373  * is NULL, or -ENOMEM if the mapping failed
2374  */
2375 static
2376 int megasas_make_sgl(struct megasas_instance *instance, struct scsi_cmnd *scp,
2377                      struct megasas_cmd_fusion *cmd)
2378 {
2379         int sge_count;
2380         bool build_prp = false;
2381         struct MPI25_IEEE_SGE_CHAIN64 *sgl_chain64;
2382
2383         sge_count = scsi_dma_map(scp);
2384
2385         if ((sge_count > instance->max_num_sge) || (sge_count <= 0))
2386                 return sge_count;
2387
2388         sgl_chain64 = (struct MPI25_IEEE_SGE_CHAIN64 *)&cmd->io_request->SGL;
2389         if ((le16_to_cpu(cmd->io_request->IoFlags) &
2390             MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) &&
2391             (cmd->pd_interface == NVME_PD))
2392                 build_prp = megasas_make_prp_nvme(instance, scp, sgl_chain64,
2393                                                   cmd, sge_count);
2394
2395         if (!build_prp)
2396                 megasas_make_sgl_fusion(instance, scp, sgl_chain64,
2397                                         cmd, sge_count);
2398
2399         return sge_count;
2400 }
2401
2402 /**
2403  * megasas_set_pd_lba - Sets PD LBA
2404  * @cdb:                CDB
2405  * @cdb_len:            cdb length
2406  * @start_blk:          Start block of IO
2407  *
2408  * Used to set the PD LBA in CDB for FP IOs
2409  */
2410 static void
2411 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
2412                    struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
2413                    struct MR_DRV_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
2414 {
2415         struct MR_LD_RAID *raid;
2416         u16 ld;
2417         u64 start_blk = io_info->pdBlock;
2418         u8 *cdb = io_request->CDB.CDB32;
2419         u32 num_blocks = io_info->numBlocks;
2420         u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
2421
2422         /* Check if T10 PI (DIF) is enabled for this LD */
2423         ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
2424         raid = MR_LdRaidGet(ld, local_map_ptr);
2425         if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
2426                 memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2427                 cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
2428                 cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
2429
2430                 if (scp->sc_data_direction == DMA_FROM_DEVICE)
2431                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
2432                 else
2433                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
2434                 cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
2435
2436                 /* LBA */
2437                 cdb[12] = (u8)((start_blk >> 56) & 0xff);
2438                 cdb[13] = (u8)((start_blk >> 48) & 0xff);
2439                 cdb[14] = (u8)((start_blk >> 40) & 0xff);
2440                 cdb[15] = (u8)((start_blk >> 32) & 0xff);
2441                 cdb[16] = (u8)((start_blk >> 24) & 0xff);
2442                 cdb[17] = (u8)((start_blk >> 16) & 0xff);
2443                 cdb[18] = (u8)((start_blk >> 8) & 0xff);
2444                 cdb[19] = (u8)(start_blk & 0xff);
2445
2446                 /* Logical block reference tag */
2447                 io_request->CDB.EEDP32.PrimaryReferenceTag =
2448                         cpu_to_be32(ref_tag);
2449                 io_request->CDB.EEDP32.PrimaryApplicationTagMask = cpu_to_be16(0xffff);
2450                 io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */
2451
2452                 /* Transfer length */
2453                 cdb[28] = (u8)((num_blocks >> 24) & 0xff);
2454                 cdb[29] = (u8)((num_blocks >> 16) & 0xff);
2455                 cdb[30] = (u8)((num_blocks >> 8) & 0xff);
2456                 cdb[31] = (u8)(num_blocks & 0xff);
2457
2458                 /* set SCSI IO EEDPFlags */
2459                 if (scp->sc_data_direction == DMA_FROM_DEVICE) {
2460                         io_request->EEDPFlags = cpu_to_le16(
2461                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
2462                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
2463                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
2464                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
2465                                 MPI25_SCSIIO_EEDPFLAGS_DO_NOT_DISABLE_MODE |
2466                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD);
2467                 } else {
2468                         io_request->EEDPFlags = cpu_to_le16(
2469                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
2470                                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP);
2471                 }
2472                 io_request->Control |= cpu_to_le32((0x4 << 26));
2473                 io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size);
2474         } else {
2475                 /* Some drives don't support 16/12 byte CDB's, convert to 10 */
2476                 if (((cdb_len == 12) || (cdb_len == 16)) &&
2477                     (start_blk <= 0xffffffff)) {
2478                         if (cdb_len == 16) {
2479                                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
2480                                 flagvals = cdb[1];
2481                                 groupnum = cdb[14];
2482                                 control = cdb[15];
2483                         } else {
2484                                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
2485                                 flagvals = cdb[1];
2486                                 groupnum = cdb[10];
2487                                 control = cdb[11];
2488                         }
2489
2490                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2491
2492                         cdb[0] = opcode;
2493                         cdb[1] = flagvals;
2494                         cdb[6] = groupnum;
2495                         cdb[9] = control;
2496
2497                         /* Transfer length */
2498                         cdb[8] = (u8)(num_blocks & 0xff);
2499                         cdb[7] = (u8)((num_blocks >> 8) & 0xff);
2500
2501                         io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */
2502                         cdb_len = 10;
2503                 } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
2504                         /* Convert to 16 byte CDB for large LBA's */
2505                         switch (cdb_len) {
2506                         case 6:
2507                                 opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
2508                                 control = cdb[5];
2509                                 break;
2510                         case 10:
2511                                 opcode =
2512                                         cdb[0] == READ_10 ? READ_16 : WRITE_16;
2513                                 flagvals = cdb[1];
2514                                 groupnum = cdb[6];
2515                                 control = cdb[9];
2516                                 break;
2517                         case 12:
2518                                 opcode =
2519                                         cdb[0] == READ_12 ? READ_16 : WRITE_16;
2520                                 flagvals = cdb[1];
2521                                 groupnum = cdb[10];
2522                                 control = cdb[11];
2523                                 break;
2524                         }
2525
2526                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2527
2528                         cdb[0] = opcode;
2529                         cdb[1] = flagvals;
2530                         cdb[14] = groupnum;
2531                         cdb[15] = control;
2532
2533                         /* Transfer length */
2534                         cdb[13] = (u8)(num_blocks & 0xff);
2535                         cdb[12] = (u8)((num_blocks >> 8) & 0xff);
2536                         cdb[11] = (u8)((num_blocks >> 16) & 0xff);
2537                         cdb[10] = (u8)((num_blocks >> 24) & 0xff);
2538
2539                         io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */
2540                         cdb_len = 16;
2541                 }
2542
2543                 /* Normal case, just load LBA here */
2544                 switch (cdb_len) {
2545                 case 6:
2546                 {
2547                         u8 val = cdb[1] & 0xE0;
2548                         cdb[3] = (u8)(start_blk & 0xff);
2549                         cdb[2] = (u8)((start_blk >> 8) & 0xff);
2550                         cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
2551                         break;
2552                 }
2553                 case 10:
2554                         cdb[5] = (u8)(start_blk & 0xff);
2555                         cdb[4] = (u8)((start_blk >> 8) & 0xff);
2556                         cdb[3] = (u8)((start_blk >> 16) & 0xff);
2557                         cdb[2] = (u8)((start_blk >> 24) & 0xff);
2558                         break;
2559                 case 12:
2560                         cdb[5]    = (u8)(start_blk & 0xff);
2561                         cdb[4]    = (u8)((start_blk >> 8) & 0xff);
2562                         cdb[3]    = (u8)((start_blk >> 16) & 0xff);
2563                         cdb[2]    = (u8)((start_blk >> 24) & 0xff);
2564                         break;
2565                 case 16:
2566                         cdb[9]    = (u8)(start_blk & 0xff);
2567                         cdb[8]    = (u8)((start_blk >> 8) & 0xff);
2568                         cdb[7]    = (u8)((start_blk >> 16) & 0xff);
2569                         cdb[6]    = (u8)((start_blk >> 24) & 0xff);
2570                         cdb[5]    = (u8)((start_blk >> 32) & 0xff);
2571                         cdb[4]    = (u8)((start_blk >> 40) & 0xff);
2572                         cdb[3]    = (u8)((start_blk >> 48) & 0xff);
2573                         cdb[2]    = (u8)((start_blk >> 56) & 0xff);
2574                         break;
2575                 }
2576         }
2577 }
2578
2579 /**
2580  * megasas_stream_detect -      stream detection on read and and write IOs
2581  * @instance:           Adapter soft state
2582  * @cmd:                    Command to be prepared
2583  * @io_info:            IO Request info
2584  *
2585  */
2586
2587 /** stream detection on read and and write IOs */
2588 static void megasas_stream_detect(struct megasas_instance *instance,
2589                                   struct megasas_cmd_fusion *cmd,
2590                                   struct IO_REQUEST_INFO *io_info)
2591 {
2592         struct fusion_context *fusion = instance->ctrl_context;
2593         u32 device_id = io_info->ldTgtId;
2594         struct LD_STREAM_DETECT *current_ld_sd
2595                 = fusion->stream_detect_by_ld[device_id];
2596         u32 *track_stream = &current_ld_sd->mru_bit_map, stream_num;
2597         u32 shifted_values, unshifted_values;
2598         u32 index_value_mask, shifted_values_mask;
2599         int i;
2600         bool is_read_ahead = false;
2601         struct STREAM_DETECT *current_sd;
2602         /* find possible stream */
2603         for (i = 0; i < MAX_STREAMS_TRACKED; ++i) {
2604                 stream_num = (*track_stream >>
2605                         (i * BITS_PER_INDEX_STREAM)) &
2606                         STREAM_MASK;
2607                 current_sd = &current_ld_sd->stream_track[stream_num];
2608                 /* if we found a stream, update the raid
2609                  *  context and also update the mruBitMap
2610                  */
2611                 /*      boundary condition */
2612                 if ((current_sd->next_seq_lba) &&
2613                     (io_info->ldStartBlock >= current_sd->next_seq_lba) &&
2614                     (io_info->ldStartBlock <= (current_sd->next_seq_lba + 32)) &&
2615                     (current_sd->is_read == io_info->isRead)) {
2616
2617                         if ((io_info->ldStartBlock != current_sd->next_seq_lba) &&
2618                             ((!io_info->isRead) || (!is_read_ahead)))
2619                                 /*
2620                                  * Once the API availible we need to change this.
2621                                  * At this point we are not allowing any gap
2622                                  */
2623                                 continue;
2624
2625                         SET_STREAM_DETECTED(cmd->io_request->RaidContext.raid_context_g35);
2626                         current_sd->next_seq_lba =
2627                         io_info->ldStartBlock + io_info->numBlocks;
2628                         /*
2629                          *      update the mruBitMap LRU
2630                          */
2631                         shifted_values_mask =
2632                                 (1 <<  i * BITS_PER_INDEX_STREAM) - 1;
2633                         shifted_values = ((*track_stream & shifted_values_mask)
2634                                                 << BITS_PER_INDEX_STREAM);
2635                         index_value_mask =
2636                                 STREAM_MASK << i * BITS_PER_INDEX_STREAM;
2637                         unshifted_values =
2638                                 *track_stream & ~(shifted_values_mask |
2639                                 index_value_mask);
2640                         *track_stream =
2641                                 unshifted_values | shifted_values | stream_num;
2642                         return;
2643                 }
2644         }
2645         /*
2646          * if we did not find any stream, create a new one
2647          * from the least recently used
2648          */
2649         stream_num = (*track_stream >>
2650                 ((MAX_STREAMS_TRACKED - 1) * BITS_PER_INDEX_STREAM)) &
2651                 STREAM_MASK;
2652         current_sd = &current_ld_sd->stream_track[stream_num];
2653         current_sd->is_read = io_info->isRead;
2654         current_sd->next_seq_lba = io_info->ldStartBlock + io_info->numBlocks;
2655         *track_stream = (((*track_stream & ZERO_LAST_STREAM) << 4) | stream_num);
2656         return;
2657 }
2658
2659 /**
2660  * megasas_set_raidflag_cpu_affinity - This function sets the cpu
2661  * affinity (cpu of the controller) and raid_flags in the raid context
2662  * based on IO type.
2663  *
2664  * @praid_context:      IO RAID context
2665  * @raid:               LD raid map
2666  * @fp_possible:        Is fast path possible?
2667  * @is_read:            Is read IO?
2668  *
2669  */
2670 static void
2671 megasas_set_raidflag_cpu_affinity(struct fusion_context *fusion,
2672                                 union RAID_CONTEXT_UNION *praid_context,
2673                                 struct MR_LD_RAID *raid, bool fp_possible,
2674                                 u8 is_read, u32 scsi_buff_len)
2675 {
2676         u8 cpu_sel = MR_RAID_CTX_CPUSEL_0;
2677         struct RAID_CONTEXT_G35 *rctx_g35;
2678
2679         rctx_g35 = &praid_context->raid_context_g35;
2680         if (fp_possible) {
2681                 if (is_read) {
2682                         if ((raid->cpuAffinity.pdRead.cpu0) &&
2683                             (raid->cpuAffinity.pdRead.cpu1))
2684                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2685                         else if (raid->cpuAffinity.pdRead.cpu1)
2686                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2687                 } else {
2688                         if ((raid->cpuAffinity.pdWrite.cpu0) &&
2689                             (raid->cpuAffinity.pdWrite.cpu1))
2690                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2691                         else if (raid->cpuAffinity.pdWrite.cpu1)
2692                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2693                         /* Fast path cache by pass capable R0/R1 VD */
2694                         if ((raid->level <= 1) &&
2695                             (raid->capability.fp_cache_bypass_capable)) {
2696                                 rctx_g35->routing_flags |=
2697                                         (1 << MR_RAID_CTX_ROUTINGFLAGS_SLD_SHIFT);
2698                                 rctx_g35->raid_flags =
2699                                         (MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS
2700                                         << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
2701                         }
2702                 }
2703         } else {
2704                 if (is_read) {
2705                         if ((raid->cpuAffinity.ldRead.cpu0) &&
2706                             (raid->cpuAffinity.ldRead.cpu1))
2707                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2708                         else if (raid->cpuAffinity.ldRead.cpu1)
2709                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2710                 } else {
2711                         if ((raid->cpuAffinity.ldWrite.cpu0) &&
2712                             (raid->cpuAffinity.ldWrite.cpu1))
2713                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2714                         else if (raid->cpuAffinity.ldWrite.cpu1)
2715                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2716
2717                         if (is_stream_detected(rctx_g35) &&
2718                             ((raid->level == 5) || (raid->level == 6)) &&
2719                             (raid->writeMode == MR_RL_WRITE_THROUGH_MODE) &&
2720                             (cpu_sel == MR_RAID_CTX_CPUSEL_FCFS))
2721                                 cpu_sel = MR_RAID_CTX_CPUSEL_0;
2722                 }
2723         }
2724
2725         rctx_g35->routing_flags |=
2726                 (cpu_sel << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
2727
2728         /* Always give priority to MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
2729          * vs MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS.
2730          * IO Subtype is not bitmap.
2731          */
2732         if ((fusion->pcie_bw_limitation) && (raid->level == 1) && (!is_read) &&
2733                         (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)) {
2734                 praid_context->raid_context_g35.raid_flags =
2735                         (MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
2736                         << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
2737         }
2738 }
2739
2740 /**
2741  * megasas_build_ldio_fusion -  Prepares IOs to devices
2742  * @instance:           Adapter soft state
2743  * @scp:                SCSI command
2744  * @cmd:                Command to be prepared
2745  *
2746  * Prepares the io_request and chain elements (sg_frame) for IO
2747  * The IO can be for PD (Fast Path) or LD
2748  */
2749 static void
2750 megasas_build_ldio_fusion(struct megasas_instance *instance,
2751                           struct scsi_cmnd *scp,
2752                           struct megasas_cmd_fusion *cmd)
2753 {
2754         bool fp_possible;
2755         u16 ld;
2756         u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
2757         u32 scsi_buff_len;
2758         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
2759         struct IO_REQUEST_INFO io_info;
2760         struct fusion_context *fusion;
2761         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
2762         u8 *raidLUN;
2763         unsigned long spinlock_flags;
2764         struct MR_LD_RAID *raid = NULL;
2765         struct MR_PRIV_DEVICE *mrdev_priv;
2766         struct RAID_CONTEXT *rctx;
2767         struct RAID_CONTEXT_G35 *rctx_g35;
2768
2769         device_id = MEGASAS_DEV_INDEX(scp);
2770
2771         fusion = instance->ctrl_context;
2772
2773         io_request = cmd->io_request;
2774         rctx = &io_request->RaidContext.raid_context;
2775         rctx_g35 = &io_request->RaidContext.raid_context_g35;
2776
2777         rctx->virtual_disk_tgt_id = cpu_to_le16(device_id);
2778         rctx->status = 0;
2779         rctx->ex_status = 0;
2780
2781         start_lba_lo = 0;
2782         start_lba_hi = 0;
2783         fp_possible = false;
2784
2785         /*
2786          * 6-byte READ(0x08) or WRITE(0x0A) cdb
2787          */
2788         if (scp->cmd_len == 6) {
2789                 datalength = (u32) scp->cmnd[4];
2790                 start_lba_lo = ((u32) scp->cmnd[1] << 16) |
2791                         ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
2792
2793                 start_lba_lo &= 0x1FFFFF;
2794         }
2795
2796         /*
2797          * 10-byte READ(0x28) or WRITE(0x2A) cdb
2798          */
2799         else if (scp->cmd_len == 10) {
2800                 datalength = (u32) scp->cmnd[8] |
2801                         ((u32) scp->cmnd[7] << 8);
2802                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
2803                         ((u32) scp->cmnd[3] << 16) |
2804                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2805         }
2806
2807         /*
2808          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
2809          */
2810         else if (scp->cmd_len == 12) {
2811                 datalength = ((u32) scp->cmnd[6] << 24) |
2812                         ((u32) scp->cmnd[7] << 16) |
2813                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
2814                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
2815                         ((u32) scp->cmnd[3] << 16) |
2816                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2817         }
2818
2819         /*
2820          * 16-byte READ(0x88) or WRITE(0x8A) cdb
2821          */
2822         else if (scp->cmd_len == 16) {
2823                 datalength = ((u32) scp->cmnd[10] << 24) |
2824                         ((u32) scp->cmnd[11] << 16) |
2825                         ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
2826                 start_lba_lo = ((u32) scp->cmnd[6] << 24) |
2827                         ((u32) scp->cmnd[7] << 16) |
2828                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
2829
2830                 start_lba_hi = ((u32) scp->cmnd[2] << 24) |
2831                         ((u32) scp->cmnd[3] << 16) |
2832                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2833         }
2834
2835         memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
2836         io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
2837         io_info.numBlocks = datalength;
2838         io_info.ldTgtId = device_id;
2839         io_info.r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
2840         scsi_buff_len = scsi_bufflen(scp);
2841         io_request->DataLength = cpu_to_le32(scsi_buff_len);
2842         io_info.data_arms = 1;
2843
2844         if (scp->sc_data_direction == DMA_FROM_DEVICE)
2845                 io_info.isRead = 1;
2846
2847         local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
2848         ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
2849
2850         if (ld < instance->fw_supported_vd_count)
2851                 raid = MR_LdRaidGet(ld, local_map_ptr);
2852
2853         if (!raid || (!fusion->fast_path_io)) {
2854                 rctx->reg_lock_flags  = 0;
2855                 fp_possible = false;
2856         } else {
2857                 if (MR_BuildRaidContext(instance, &io_info, rctx,
2858                                         local_map_ptr, &raidLUN))
2859                         fp_possible = (io_info.fpOkForIo > 0) ? true : false;
2860         }
2861
2862         megasas_get_msix_index(instance, scp, cmd, io_info.data_arms);
2863
2864         if (instance->adapter_type >= VENTURA_SERIES) {
2865                 /* FP for Optimal raid level 1.
2866                  * All large RAID-1 writes (> 32 KiB, both WT and WB modes)
2867                  * are built by the driver as LD I/Os.
2868                  * All small RAID-1 WT writes (<= 32 KiB) are built as FP I/Os
2869                  * (there is never a reason to process these as buffered writes)
2870                  * All small RAID-1 WB writes (<= 32 KiB) are built as FP I/Os
2871                  * with the SLD bit asserted.
2872                  */
2873                 if (io_info.r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
2874                         mrdev_priv = scp->device->hostdata;
2875
2876                         if (atomic_inc_return(&instance->fw_outstanding) >
2877                                 (instance->host->can_queue)) {
2878                                 fp_possible = false;
2879                                 atomic_dec(&instance->fw_outstanding);
2880                         } else if (fusion->pcie_bw_limitation &&
2881                                 ((scsi_buff_len > MR_LARGE_IO_MIN_SIZE) ||
2882                                    (atomic_dec_if_positive(&mrdev_priv->r1_ldio_hint) > 0))) {
2883                                 fp_possible = false;
2884                                 atomic_dec(&instance->fw_outstanding);
2885                                 if (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)
2886                                         atomic_set(&mrdev_priv->r1_ldio_hint,
2887                                                    instance->r1_ldio_hint_default);
2888                         }
2889                 }
2890
2891                 if (!fp_possible ||
2892                     (io_info.isRead && io_info.ra_capable)) {
2893                         spin_lock_irqsave(&instance->stream_lock,
2894                                           spinlock_flags);
2895                         megasas_stream_detect(instance, cmd, &io_info);
2896                         spin_unlock_irqrestore(&instance->stream_lock,
2897                                                spinlock_flags);
2898                         /* In ventura if stream detected for a read and it is
2899                          * read ahead capable make this IO as LDIO
2900                          */
2901                         if (is_stream_detected(rctx_g35))
2902                                 fp_possible = false;
2903                 }
2904
2905                 /* If raid is NULL, set CPU affinity to default CPU0 */
2906                 if (raid)
2907                         megasas_set_raidflag_cpu_affinity(fusion, &io_request->RaidContext,
2908                                 raid, fp_possible, io_info.isRead,
2909                                 scsi_buff_len);
2910                 else
2911                         rctx_g35->routing_flags |=
2912                                 (MR_RAID_CTX_CPUSEL_0 << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
2913         }
2914
2915         if (fp_possible) {
2916                 megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
2917                                    local_map_ptr, start_lba_lo);
2918                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
2919                 cmd->request_desc->SCSIIO.RequestFlags =
2920                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO
2921                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2922                 if (instance->adapter_type == INVADER_SERIES) {
2923                         rctx->type = MPI2_TYPE_CUDA;
2924                         rctx->nseg = 0x1;
2925                         io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
2926                         rctx->reg_lock_flags |=
2927                           (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
2928                            MR_RL_FLAGS_SEQ_NUM_ENABLE);
2929                 } else if (instance->adapter_type >= VENTURA_SERIES) {
2930                         rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
2931                         rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2932                         rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2933                         io_request->IoFlags |=
2934                                 cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
2935                 }
2936                 if (fusion->load_balance_info &&
2937                         (fusion->load_balance_info[device_id].loadBalanceFlag) &&
2938                         (io_info.isRead)) {
2939                         io_info.devHandle =
2940                                 get_updated_dev_handle(instance,
2941                                         &fusion->load_balance_info[device_id],
2942                                         &io_info, local_map_ptr);
2943                         scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
2944                         cmd->pd_r1_lb = io_info.pd_after_lb;
2945                         if (instance->adapter_type >= VENTURA_SERIES)
2946                                 rctx_g35->span_arm = io_info.span_arm;
2947                         else
2948                                 rctx->span_arm = io_info.span_arm;
2949
2950                 } else
2951                         scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
2952
2953                 if (instance->adapter_type >= VENTURA_SERIES)
2954                         cmd->r1_alt_dev_handle = io_info.r1_alt_dev_handle;
2955                 else
2956                         cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
2957
2958                 if ((raidLUN[0] == 1) &&
2959                         (local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].validHandles > 1)) {
2960                         instance->dev_handle = !(instance->dev_handle);
2961                         io_info.devHandle =
2962                                 local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].devHandle[instance->dev_handle];
2963                 }
2964
2965                 cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
2966                 io_request->DevHandle = io_info.devHandle;
2967                 cmd->pd_interface = io_info.pd_interface;
2968                 /* populate the LUN field */
2969                 memcpy(io_request->LUN, raidLUN, 8);
2970         } else {
2971                 rctx->timeout_value =
2972                         cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
2973                 cmd->request_desc->SCSIIO.RequestFlags =
2974                         (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
2975                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2976                 if (instance->adapter_type == INVADER_SERIES) {
2977                         if (io_info.do_fp_rlbypass ||
2978                         (rctx->reg_lock_flags == REGION_TYPE_UNUSED))
2979                                 cmd->request_desc->SCSIIO.RequestFlags =
2980                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
2981                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2982                         rctx->type = MPI2_TYPE_CUDA;
2983                         rctx->reg_lock_flags |=
2984                                 (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
2985                                         MR_RL_FLAGS_SEQ_NUM_ENABLE);
2986                         rctx->nseg = 0x1;
2987                 } else if (instance->adapter_type >= VENTURA_SERIES) {
2988                         rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2989                         rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
2990                         rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2991                 }
2992                 io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
2993                 io_request->DevHandle = cpu_to_le16(device_id);
2994
2995         } /* Not FP */
2996 }
2997
2998 /**
2999  * megasas_build_ld_nonrw_fusion - prepares non rw ios for virtual disk
3000  * @instance:           Adapter soft state
3001  * @scp:                SCSI command
3002  * @cmd:                Command to be prepared
3003  *
3004  * Prepares the io_request frame for non-rw io cmds for vd.
3005  */
3006 static void megasas_build_ld_nonrw_fusion(struct megasas_instance *instance,
3007                           struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd)
3008 {
3009         u32 device_id;
3010         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
3011         u16 ld;
3012         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
3013         struct fusion_context *fusion = instance->ctrl_context;
3014         u8                          span, physArm;
3015         __le16                      devHandle;
3016         u32                         arRef, pd;
3017         struct MR_LD_RAID                  *raid;
3018         struct RAID_CONTEXT                *pRAID_Context;
3019         u8 fp_possible = 1;
3020
3021         io_request = cmd->io_request;
3022         device_id = MEGASAS_DEV_INDEX(scmd);
3023         local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
3024         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
3025         /* get RAID_Context pointer */
3026         pRAID_Context = &io_request->RaidContext.raid_context;
3027         /* Check with FW team */
3028         pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3029         pRAID_Context->reg_lock_row_lba    = 0;
3030         pRAID_Context->reg_lock_length    = 0;
3031
3032         if (fusion->fast_path_io && (
3033                 device_id < instance->fw_supported_vd_count)) {
3034
3035                 ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
3036                 if (ld >= instance->fw_supported_vd_count - 1)
3037                         fp_possible = 0;
3038                 else {
3039                         raid = MR_LdRaidGet(ld, local_map_ptr);
3040                         if (!(raid->capability.fpNonRWCapable))
3041                                 fp_possible = 0;
3042                 }
3043         } else
3044                 fp_possible = 0;
3045
3046         if (!fp_possible) {
3047                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
3048                 io_request->DevHandle = cpu_to_le16(device_id);
3049                 io_request->LUN[1] = scmd->device->lun;
3050                 pRAID_Context->timeout_value =
3051                         cpu_to_le16 (scmd->request->timeout / HZ);
3052                 cmd->request_desc->SCSIIO.RequestFlags =
3053                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3054                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3055         } else {
3056
3057                 /* set RAID context values */
3058                 pRAID_Context->config_seq_num = raid->seqNum;
3059                 if (instance->adapter_type < VENTURA_SERIES)
3060                         pRAID_Context->reg_lock_flags = REGION_TYPE_SHARED_READ;
3061                 pRAID_Context->timeout_value =
3062                         cpu_to_le16(raid->fpIoTimeoutForLd);
3063
3064                 /* get the DevHandle for the PD (since this is
3065                    fpNonRWCapable, this is a single disk RAID0) */
3066                 span = physArm = 0;
3067                 arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
3068                 pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
3069                 devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
3070
3071                 /* build request descriptor */
3072                 cmd->request_desc->SCSIIO.RequestFlags =
3073                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
3074                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3075                 cmd->request_desc->SCSIIO.DevHandle = devHandle;
3076
3077                 /* populate the LUN field */
3078                 memcpy(io_request->LUN, raid->LUN, 8);
3079
3080                 /* build the raidScsiIO structure */
3081                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
3082                 io_request->DevHandle = devHandle;
3083         }
3084 }
3085
3086 /**
3087  * megasas_build_syspd_fusion - prepares rw/non-rw ios for syspd
3088  * @instance:           Adapter soft state
3089  * @scp:                SCSI command
3090  * @cmd:                Command to be prepared
3091  * @fp_possible:        parameter to detect fast path or firmware path io.
3092  *
3093  * Prepares the io_request frame for rw/non-rw io cmds for syspds
3094  */
3095 static void
3096 megasas_build_syspd_fusion(struct megasas_instance *instance,
3097         struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd,
3098         bool fp_possible)
3099 {
3100         u32 device_id;
3101         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
3102         u16 pd_index = 0;
3103         u16 os_timeout_value;
3104         u16 timeout_limit;
3105         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
3106         struct RAID_CONTEXT     *pRAID_Context;
3107         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
3108         struct MR_PRIV_DEVICE *mr_device_priv_data;
3109         struct fusion_context *fusion = instance->ctrl_context;
3110         pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id - 1) & 1];
3111
3112         device_id = MEGASAS_DEV_INDEX(scmd);
3113         pd_index = MEGASAS_PD_INDEX(scmd);
3114         os_timeout_value = scmd->request->timeout / HZ;
3115         mr_device_priv_data = scmd->device->hostdata;
3116         cmd->pd_interface = mr_device_priv_data->interface_type;
3117
3118         io_request = cmd->io_request;
3119         /* get RAID_Context pointer */
3120         pRAID_Context = &io_request->RaidContext.raid_context;
3121         pRAID_Context->reg_lock_flags = 0;
3122         pRAID_Context->reg_lock_row_lba = 0;
3123         pRAID_Context->reg_lock_length = 0;
3124         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
3125         io_request->LUN[1] = scmd->device->lun;
3126         pRAID_Context->raid_flags = MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD
3127                 << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
3128
3129         /* If FW supports PD sequence number */
3130         if (instance->support_seqnum_jbod_fp) {
3131                 if (instance->use_seqnum_jbod_fp &&
3132                         instance->pd_list[pd_index].driveType == TYPE_DISK) {
3133
3134                         /* More than 256 PD/JBOD support for Ventura */
3135                         if (instance->support_morethan256jbod)
3136                                 pRAID_Context->virtual_disk_tgt_id =
3137                                         pd_sync->seq[pd_index].pd_target_id;
3138                         else
3139                                 pRAID_Context->virtual_disk_tgt_id =
3140                                         cpu_to_le16(device_id +
3141                                         (MAX_PHYSICAL_DEVICES - 1));
3142                         pRAID_Context->config_seq_num =
3143                                 pd_sync->seq[pd_index].seqNum;
3144                         io_request->DevHandle =
3145                                 pd_sync->seq[pd_index].devHandle;
3146                         if (instance->adapter_type >= VENTURA_SERIES) {
3147                                 io_request->RaidContext.raid_context_g35.routing_flags |=
3148                                         (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
3149                                 io_request->RaidContext.raid_context_g35.nseg_type |=
3150                                         (1 << RAID_CONTEXT_NSEG_SHIFT);
3151                                 io_request->RaidContext.raid_context_g35.nseg_type |=
3152                                         (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
3153                         } else {
3154                                 pRAID_Context->type = MPI2_TYPE_CUDA;
3155                                 pRAID_Context->nseg = 0x1;
3156                                 pRAID_Context->reg_lock_flags |=
3157                                         (MR_RL_FLAGS_SEQ_NUM_ENABLE |
3158                                          MR_RL_FLAGS_GRANT_DESTINATION_CUDA);
3159                         }
3160                 } else {
3161                         pRAID_Context->virtual_disk_tgt_id =
3162                                 cpu_to_le16(device_id +
3163                                 (MAX_PHYSICAL_DEVICES - 1));
3164                         pRAID_Context->config_seq_num = 0;
3165                         io_request->DevHandle = cpu_to_le16(0xFFFF);
3166                 }
3167         } else {
3168                 pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3169                 pRAID_Context->config_seq_num = 0;
3170
3171                 if (fusion->fast_path_io) {
3172                         local_map_ptr =
3173                                 fusion->ld_drv_map[(instance->map_id & 1)];
3174                         io_request->DevHandle =
3175                                 local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
3176                 } else {
3177                         io_request->DevHandle = cpu_to_le16(0xFFFF);
3178                 }
3179         }
3180
3181         cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
3182
3183         megasas_get_msix_index(instance, scmd, cmd, 1);
3184
3185         if (!fp_possible) {
3186                 /* system pd firmware path */
3187                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
3188                 cmd->request_desc->SCSIIO.RequestFlags =
3189                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3190                                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3191                 pRAID_Context->timeout_value = cpu_to_le16(os_timeout_value);
3192                 pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3193         } else {
3194                 if (os_timeout_value)
3195                         os_timeout_value++;
3196
3197                 /* system pd Fast Path */
3198                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
3199                 timeout_limit = (scmd->device->type == TYPE_DISK) ?
3200                                 255 : 0xFFFF;
3201                 pRAID_Context->timeout_value =
3202                         cpu_to_le16((os_timeout_value > timeout_limit) ?
3203                         timeout_limit : os_timeout_value);
3204                 if (instance->adapter_type >= INVADER_SERIES)
3205                         io_request->IoFlags |=
3206                                 cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
3207
3208                 cmd->request_desc->SCSIIO.RequestFlags =
3209                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
3210                                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3211         }
3212 }
3213
3214 /**
3215  * megasas_build_io_fusion -    Prepares IOs to devices
3216  * @instance:           Adapter soft state
3217  * @scp:                SCSI command
3218  * @cmd:                Command to be prepared
3219  *
3220  * Invokes helper functions to prepare request frames
3221  * and sets flags appropriate for IO/Non-IO cmd
3222  */
3223 static int
3224 megasas_build_io_fusion(struct megasas_instance *instance,
3225                         struct scsi_cmnd *scp,
3226                         struct megasas_cmd_fusion *cmd)
3227 {
3228         int sge_count;
3229         u8  cmd_type;
3230         struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
3231         struct MR_PRIV_DEVICE *mr_device_priv_data;
3232         mr_device_priv_data = scp->device->hostdata;
3233
3234         /* Zero out some fields so they don't get reused */
3235         memset(io_request->LUN, 0x0, 8);
3236         io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
3237         io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
3238         io_request->EEDPFlags = 0;
3239         io_request->Control = 0;
3240         io_request->EEDPBlockSize = 0;
3241         io_request->ChainOffset = 0;
3242         io_request->RaidContext.raid_context.raid_flags = 0;
3243         io_request->RaidContext.raid_context.type = 0;
3244         io_request->RaidContext.raid_context.nseg = 0;
3245
3246         memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
3247         /*
3248          * Just the CDB length,rest of the Flags are zero
3249          * This will be modified for FP in build_ldio_fusion
3250          */
3251         io_request->IoFlags = cpu_to_le16(scp->cmd_len);
3252
3253         switch (cmd_type = megasas_cmd_type(scp)) {
3254         case READ_WRITE_LDIO:
3255                 megasas_build_ldio_fusion(instance, scp, cmd);
3256                 break;
3257         case NON_READ_WRITE_LDIO:
3258                 megasas_build_ld_nonrw_fusion(instance, scp, cmd);
3259                 break;
3260         case READ_WRITE_SYSPDIO:
3261                 megasas_build_syspd_fusion(instance, scp, cmd, true);
3262                 break;
3263         case NON_READ_WRITE_SYSPDIO:
3264                 if (instance->secure_jbod_support ||
3265                     mr_device_priv_data->is_tm_capable)
3266                         megasas_build_syspd_fusion(instance, scp, cmd, false);
3267                 else
3268                         megasas_build_syspd_fusion(instance, scp, cmd, true);
3269                 break;
3270         default:
3271                 break;
3272         }
3273
3274         /*
3275          * Construct SGL
3276          */
3277
3278         sge_count = megasas_make_sgl(instance, scp, cmd);
3279
3280         if (sge_count > instance->max_num_sge || (sge_count < 0)) {
3281                 dev_err(&instance->pdev->dev,
3282                         "%s %d sge_count (%d) is out of range. Range is:  0-%d\n",
3283                         __func__, __LINE__, sge_count, instance->max_num_sge);
3284                 return 1;
3285         }
3286
3287         if (instance->adapter_type >= VENTURA_SERIES) {
3288                 set_num_sge(&io_request->RaidContext.raid_context_g35, sge_count);
3289                 cpu_to_le16s(&io_request->RaidContext.raid_context_g35.routing_flags);
3290                 cpu_to_le16s(&io_request->RaidContext.raid_context_g35.nseg_type);
3291         } else {
3292                 /* numSGE store lower 8 bit of sge_count.
3293                  * numSGEExt store higher 8 bit of sge_count
3294                  */
3295                 io_request->RaidContext.raid_context.num_sge = sge_count;
3296                 io_request->RaidContext.raid_context.num_sge_ext =
3297                         (u8)(sge_count >> 8);
3298         }
3299
3300         io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING);
3301
3302         if (scp->sc_data_direction == DMA_TO_DEVICE)
3303                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE);
3304         else if (scp->sc_data_direction == DMA_FROM_DEVICE)
3305                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ);
3306
3307         io_request->SGLOffset0 =
3308                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
3309
3310         io_request->SenseBufferLowAddress =
3311                 cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));
3312         io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
3313
3314         cmd->scmd = scp;
3315         scp->SCp.ptr = (char *)cmd;
3316
3317         return 0;
3318 }
3319
3320 static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
3321 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
3322 {
3323         u8 *p;
3324         struct fusion_context *fusion;
3325
3326         fusion = instance->ctrl_context;
3327         p = fusion->req_frames_desc +
3328                 sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) * index;
3329
3330         return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
3331 }
3332
3333
3334 /* megasas_prepate_secondRaid1_IO
3335  *  It prepares the raid 1 second IO
3336  */
3337 static void megasas_prepare_secondRaid1_IO(struct megasas_instance *instance,
3338                                            struct megasas_cmd_fusion *cmd,
3339                                            struct megasas_cmd_fusion *r1_cmd)
3340 {
3341         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc, *req_desc2 = NULL;
3342         struct fusion_context *fusion;
3343         fusion = instance->ctrl_context;
3344         req_desc = cmd->request_desc;
3345         /* copy the io request frame as well as 8 SGEs data for r1 command*/
3346         memcpy(r1_cmd->io_request, cmd->io_request,
3347                (sizeof(struct MPI2_RAID_SCSI_IO_REQUEST)));
3348         memcpy(&r1_cmd->io_request->SGL, &cmd->io_request->SGL,
3349                (fusion->max_sge_in_main_msg * sizeof(union MPI2_SGE_IO_UNION)));
3350         /*sense buffer is different for r1 command*/
3351         r1_cmd->io_request->SenseBufferLowAddress =
3352                         cpu_to_le32(lower_32_bits(r1_cmd->sense_phys_addr));
3353         r1_cmd->scmd = cmd->scmd;
3354         req_desc2 = megasas_get_request_descriptor(instance,
3355                                                    (r1_cmd->index - 1));
3356         req_desc2->Words = 0;
3357         r1_cmd->request_desc = req_desc2;
3358         req_desc2->SCSIIO.SMID = cpu_to_le16(r1_cmd->index);
3359         req_desc2->SCSIIO.RequestFlags = req_desc->SCSIIO.RequestFlags;
3360         r1_cmd->request_desc->SCSIIO.DevHandle = cmd->r1_alt_dev_handle;
3361         r1_cmd->io_request->DevHandle = cmd->r1_alt_dev_handle;
3362         r1_cmd->r1_alt_dev_handle = cmd->io_request->DevHandle;
3363         cmd->io_request->RaidContext.raid_context_g35.flow_specific.peer_smid =
3364                         cpu_to_le16(r1_cmd->index);
3365         r1_cmd->io_request->RaidContext.raid_context_g35.flow_specific.peer_smid =
3366                         cpu_to_le16(cmd->index);
3367         /*MSIxIndex of both commands request descriptors should be same*/
3368         r1_cmd->request_desc->SCSIIO.MSIxIndex =
3369                         cmd->request_desc->SCSIIO.MSIxIndex;
3370         /*span arm is different for r1 cmd*/
3371         r1_cmd->io_request->RaidContext.raid_context_g35.span_arm =
3372                         cmd->io_request->RaidContext.raid_context_g35.span_arm + 1;
3373 }
3374
3375 /**
3376  * megasas_build_and_issue_cmd_fusion -Main routine for building and
3377  *                                     issuing non IOCTL cmd
3378  * @instance:                   Adapter soft state
3379  * @scmd:                       pointer to scsi cmd from OS
3380  */
3381 static u32
3382 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
3383                                    struct scsi_cmnd *scmd)
3384 {
3385         struct megasas_cmd_fusion *cmd, *r1_cmd = NULL;
3386         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
3387         u32 index;
3388
3389         if ((megasas_cmd_type(scmd) == READ_WRITE_LDIO) &&
3390                 instance->ldio_threshold &&
3391                 (atomic_inc_return(&instance->ldio_outstanding) >
3392                 instance->ldio_threshold)) {
3393                 atomic_dec(&instance->ldio_outstanding);
3394                 return SCSI_MLQUEUE_DEVICE_BUSY;
3395         }
3396
3397         if (atomic_inc_return(&instance->fw_outstanding) >
3398                         instance->host->can_queue) {
3399                 atomic_dec(&instance->fw_outstanding);
3400                 return SCSI_MLQUEUE_HOST_BUSY;
3401         }
3402
3403         cmd = megasas_get_cmd_fusion(instance, scmd->request->tag);
3404
3405         if (!cmd) {
3406                 atomic_dec(&instance->fw_outstanding);
3407                 return SCSI_MLQUEUE_HOST_BUSY;
3408         }
3409
3410         index = cmd->index;
3411
3412         req_desc = megasas_get_request_descriptor(instance, index-1);
3413
3414         req_desc->Words = 0;
3415         cmd->request_desc = req_desc;
3416
3417         if (megasas_build_io_fusion(instance, scmd, cmd)) {
3418                 megasas_return_cmd_fusion(instance, cmd);
3419                 dev_err(&instance->pdev->dev, "Error building command\n");
3420                 cmd->request_desc = NULL;
3421                 atomic_dec(&instance->fw_outstanding);
3422                 return SCSI_MLQUEUE_HOST_BUSY;
3423         }
3424
3425         req_desc = cmd->request_desc;
3426         req_desc->SCSIIO.SMID = cpu_to_le16(index);
3427
3428         if (cmd->io_request->ChainOffset != 0 &&
3429             cmd->io_request->ChainOffset != 0xF)
3430                 dev_err(&instance->pdev->dev, "The chain offset value is not "
3431                        "correct : %x\n", cmd->io_request->ChainOffset);
3432         /*
3433          *      if it is raid 1/10 fp write capable.
3434          *      try to get second command from pool and construct it.
3435          *      From FW, it has confirmed that lba values of two PDs
3436          *      corresponds to single R1/10 LD are always same
3437          *
3438          */
3439         /*      driver side count always should be less than max_fw_cmds
3440          *      to get new command
3441          */
3442         if (cmd->r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
3443                 r1_cmd = megasas_get_cmd_fusion(instance,
3444                                 (scmd->request->tag + instance->max_fw_cmds));
3445                 megasas_prepare_secondRaid1_IO(instance, cmd, r1_cmd);
3446         }
3447
3448
3449         /*
3450          * Issue the command to the FW
3451          */
3452
3453         megasas_fire_cmd_fusion(instance, req_desc);
3454
3455         if (r1_cmd)
3456                 megasas_fire_cmd_fusion(instance, r1_cmd->request_desc);
3457
3458
3459         return 0;
3460 }
3461
3462 /**
3463  * megasas_complete_r1_command -
3464  * completes R1 FP write commands which has valid peer smid
3465  * @instance:                   Adapter soft state
3466  * @cmd_fusion:                 MPT command frame
3467  *
3468  */
3469 static inline void
3470 megasas_complete_r1_command(struct megasas_instance *instance,
3471                             struct megasas_cmd_fusion *cmd)
3472 {
3473         u8 *sense, status, ex_status;
3474         u32 data_length;
3475         u16 peer_smid;
3476         struct fusion_context *fusion;
3477         struct megasas_cmd_fusion *r1_cmd = NULL;
3478         struct scsi_cmnd *scmd_local = NULL;
3479         struct RAID_CONTEXT_G35 *rctx_g35;
3480
3481         rctx_g35 = &cmd->io_request->RaidContext.raid_context_g35;
3482         fusion = instance->ctrl_context;
3483         peer_smid = le16_to_cpu(rctx_g35->flow_specific.peer_smid);
3484
3485         r1_cmd = fusion->cmd_list[peer_smid - 1];
3486         scmd_local = cmd->scmd;
3487         status = rctx_g35->status;
3488         ex_status = rctx_g35->ex_status;
3489         data_length = cmd->io_request->DataLength;
3490         sense = cmd->sense;
3491
3492         cmd->cmd_completed = true;
3493
3494         /* Check if peer command is completed or not*/
3495         if (r1_cmd->cmd_completed) {
3496                 rctx_g35 = &r1_cmd->io_request->RaidContext.raid_context_g35;
3497                 if (rctx_g35->status != MFI_STAT_OK) {
3498                         status = rctx_g35->status;
3499                         ex_status = rctx_g35->ex_status;
3500                         data_length = r1_cmd->io_request->DataLength;
3501                         sense = r1_cmd->sense;
3502                 }
3503
3504                 megasas_return_cmd_fusion(instance, r1_cmd);
3505                 map_cmd_status(fusion, scmd_local, status, ex_status,
3506                                le32_to_cpu(data_length), sense);
3507                 if (instance->ldio_threshold &&
3508                     megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
3509                         atomic_dec(&instance->ldio_outstanding);
3510                 scmd_local->SCp.ptr = NULL;
3511                 megasas_return_cmd_fusion(instance, cmd);
3512                 scsi_dma_unmap(scmd_local);
3513                 scmd_local->scsi_done(scmd_local);
3514         }
3515 }
3516
3517 /**
3518  * complete_cmd_fusion -        Completes command
3519  * @instance:                   Adapter soft state
3520  * Completes all commands that is in reply descriptor queue
3521  */
3522 static int
3523 complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
3524                     struct megasas_irq_context *irq_context)
3525 {
3526         union MPI2_REPLY_DESCRIPTORS_UNION *desc;
3527         struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
3528         struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
3529         struct fusion_context *fusion;
3530         struct megasas_cmd *cmd_mfi;
3531         struct megasas_cmd_fusion *cmd_fusion;
3532         u16 smid, num_completed;
3533         u8 reply_descript_type, *sense, status, extStatus;
3534         u32 device_id, data_length;
3535         union desc_value d_val;
3536         struct LD_LOAD_BALANCE_INFO *lbinfo;
3537         int threshold_reply_count = 0;
3538         struct scsi_cmnd *scmd_local = NULL;
3539         struct MR_TASK_MANAGE_REQUEST *mr_tm_req;
3540         struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_tm_req;
3541
3542         fusion = instance->ctrl_context;
3543
3544         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
3545                 return IRQ_HANDLED;
3546
3547         desc = fusion->reply_frames_desc[MSIxIndex] +
3548                                 fusion->last_reply_idx[MSIxIndex];
3549
3550         reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
3551
3552         d_val.word = desc->Words;
3553
3554         reply_descript_type = reply_desc->ReplyFlags &
3555                 MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
3556
3557         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
3558                 return IRQ_NONE;
3559
3560         num_completed = 0;
3561
3562         while (d_val.u.low != cpu_to_le32(UINT_MAX) &&
3563                d_val.u.high != cpu_to_le32(UINT_MAX)) {
3564
3565                 smid = le16_to_cpu(reply_desc->SMID);
3566                 cmd_fusion = fusion->cmd_list[smid - 1];
3567                 scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *)
3568                                                 cmd_fusion->io_request;
3569
3570                 scmd_local = cmd_fusion->scmd;
3571                 status = scsi_io_req->RaidContext.raid_context.status;
3572                 extStatus = scsi_io_req->RaidContext.raid_context.ex_status;
3573                 sense = cmd_fusion->sense;
3574                 data_length = scsi_io_req->DataLength;
3575
3576                 switch (scsi_io_req->Function) {
3577                 case MPI2_FUNCTION_SCSI_TASK_MGMT:
3578                         mr_tm_req = (struct MR_TASK_MANAGE_REQUEST *)
3579                                                 cmd_fusion->io_request;
3580                         mpi_tm_req = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *)
3581                                                 &mr_tm_req->TmRequest;
3582                         dev_dbg(&instance->pdev->dev, "TM completion:"
3583                                 "type: 0x%x TaskMID: 0x%x\n",
3584                                 mpi_tm_req->TaskType, mpi_tm_req->TaskMID);
3585                         complete(&cmd_fusion->done);
3586                         break;
3587                 case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
3588                         /* Update load balancing info */
3589                         if (fusion->load_balance_info &&
3590                             (cmd_fusion->scmd->SCp.Status &
3591                             MEGASAS_LOAD_BALANCE_FLAG)) {
3592                                 device_id = MEGASAS_DEV_INDEX(scmd_local);
3593                                 lbinfo = &fusion->load_balance_info[device_id];
3594                                 atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]);
3595                                 cmd_fusion->scmd->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
3596                         }
3597                         /* Fall through - and complete IO */
3598                 case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
3599                         atomic_dec(&instance->fw_outstanding);
3600                         if (cmd_fusion->r1_alt_dev_handle == MR_DEVHANDLE_INVALID) {
3601                                 map_cmd_status(fusion, scmd_local, status,
3602                                                extStatus, le32_to_cpu(data_length),
3603                                                sense);
3604                                 if (instance->ldio_threshold &&
3605                                     (megasas_cmd_type(scmd_local) == READ_WRITE_LDIO))
3606                                         atomic_dec(&instance->ldio_outstanding);
3607                                 scmd_local->SCp.ptr = NULL;
3608                                 megasas_return_cmd_fusion(instance, cmd_fusion);
3609                                 scsi_dma_unmap(scmd_local);
3610                                 scmd_local->scsi_done(scmd_local);
3611                         } else  /* Optimal VD - R1 FP command completion. */
3612                                 megasas_complete_r1_command(instance, cmd_fusion);
3613                         break;
3614                 case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
3615                         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
3616                         /* Poll mode. Dummy free.
3617                          * In case of Interrupt mode, caller has reverse check.
3618                          */
3619                         if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) {
3620                                 cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE;
3621                                 megasas_return_cmd(instance, cmd_mfi);
3622                         } else
3623                                 megasas_complete_cmd(instance, cmd_mfi, DID_OK);
3624                         break;
3625                 }
3626
3627                 fusion->last_reply_idx[MSIxIndex]++;
3628                 if (fusion->last_reply_idx[MSIxIndex] >=
3629                     fusion->reply_q_depth)
3630                         fusion->last_reply_idx[MSIxIndex] = 0;
3631
3632                 desc->Words = cpu_to_le64(ULLONG_MAX);
3633                 num_completed++;
3634                 threshold_reply_count++;
3635
3636                 /* Get the next reply descriptor */
3637                 if (!fusion->last_reply_idx[MSIxIndex])
3638                         desc = fusion->reply_frames_desc[MSIxIndex];
3639                 else
3640                         desc++;
3641
3642                 reply_desc =
3643                   (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
3644
3645                 d_val.word = desc->Words;
3646
3647                 reply_descript_type = reply_desc->ReplyFlags &
3648                         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
3649
3650                 if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
3651                         break;
3652                 /*
3653                  * Write to reply post host index register after completing threshold
3654                  * number of reply counts and still there are more replies in reply queue
3655                  * pending to be completed
3656                  */
3657                 if (threshold_reply_count >= instance->threshold_reply_count) {
3658                         if (instance->msix_combined)
3659                                 writel(((MSIxIndex & 0x7) << 24) |
3660                                         fusion->last_reply_idx[MSIxIndex],
3661                                         instance->reply_post_host_index_addr[MSIxIndex/8]);
3662                         else
3663                                 writel((MSIxIndex << 24) |
3664                                         fusion->last_reply_idx[MSIxIndex],
3665                                         instance->reply_post_host_index_addr[0]);
3666                         threshold_reply_count = 0;
3667                         if (irq_context) {
3668                                 if (!irq_context->irq_poll_scheduled) {
3669                                         irq_context->irq_poll_scheduled = true;
3670                                         irq_context->irq_line_enable = true;
3671                                         irq_poll_sched(&irq_context->irqpoll);
3672                                 }
3673                                 return num_completed;
3674                         }
3675                 }
3676         }
3677
3678         if (num_completed) {
3679                 wmb();
3680                 if (instance->msix_combined)
3681                         writel(((MSIxIndex & 0x7) << 24) |
3682                                 fusion->last_reply_idx[MSIxIndex],
3683                                 instance->reply_post_host_index_addr[MSIxIndex/8]);
3684                 else
3685                         writel((MSIxIndex << 24) |
3686                                 fusion->last_reply_idx[MSIxIndex],
3687                                 instance->reply_post_host_index_addr[0]);
3688                 megasas_check_and_restore_queue_depth(instance);
3689         }
3690         return num_completed;
3691 }
3692
3693 /**
3694  * megasas_enable_irq_poll() - enable irqpoll
3695  */
3696 static void megasas_enable_irq_poll(struct megasas_instance *instance)
3697 {
3698         u32 count, i;
3699         struct megasas_irq_context *irq_ctx;
3700
3701         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3702
3703         for (i = 0; i < count; i++) {
3704                 irq_ctx = &instance->irq_context[i];
3705                 irq_poll_enable(&irq_ctx->irqpoll);
3706         }
3707 }
3708
3709 /**
3710  * megasas_sync_irqs -  Synchronizes all IRQs owned by adapter
3711  * @instance:                   Adapter soft state
3712  */
3713 static void megasas_sync_irqs(unsigned long instance_addr)
3714 {
3715         u32 count, i;
3716         struct megasas_instance *instance =
3717                 (struct megasas_instance *)instance_addr;
3718         struct megasas_irq_context *irq_ctx;
3719
3720         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3721
3722         for (i = 0; i < count; i++) {
3723                 synchronize_irq(pci_irq_vector(instance->pdev, i));
3724                 irq_ctx = &instance->irq_context[i];
3725                 irq_poll_disable(&irq_ctx->irqpoll);
3726                 if (irq_ctx->irq_poll_scheduled) {
3727                         irq_ctx->irq_poll_scheduled = false;
3728                         enable_irq(irq_ctx->os_irq);
3729                 }
3730         }
3731 }
3732
3733 /**
3734  * megasas_irqpoll() - process a queue for completed reply descriptors
3735  * @irqpoll:    IRQ poll structure associated with queue to poll.
3736  * @budget:     Threshold of reply descriptors to process per poll.
3737  *
3738  * Return: The number of entries processed.
3739  */
3740
3741 int megasas_irqpoll(struct irq_poll *irqpoll, int budget)
3742 {
3743         struct megasas_irq_context *irq_ctx;
3744         struct megasas_instance *instance;
3745         int num_entries;
3746
3747         irq_ctx = container_of(irqpoll, struct megasas_irq_context, irqpoll);
3748         instance = irq_ctx->instance;
3749
3750         if (irq_ctx->irq_line_enable) {
3751                 disable_irq(irq_ctx->os_irq);
3752                 irq_ctx->irq_line_enable = false;
3753         }
3754
3755         num_entries = complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx);
3756         if (num_entries < budget) {
3757                 irq_poll_complete(irqpoll);
3758                 irq_ctx->irq_poll_scheduled = false;
3759                 enable_irq(irq_ctx->os_irq);
3760         }
3761
3762         return num_entries;
3763 }
3764
3765 /**
3766  * megasas_complete_cmd_dpc_fusion -    Completes command
3767  * @instance:                   Adapter soft state
3768  *
3769  * Tasklet to complete cmds
3770  */
3771 static void
3772 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
3773 {
3774         struct megasas_instance *instance =
3775                 (struct megasas_instance *)instance_addr;
3776         u32 count, MSIxIndex;
3777
3778         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3779
3780         /* If we have already declared adapter dead, donot complete cmds */
3781         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
3782                 return;
3783
3784         for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
3785                 complete_cmd_fusion(instance, MSIxIndex, NULL);
3786 }
3787
3788 /**
3789  * megasas_isr_fusion - isr entry point
3790  */
3791 static irqreturn_t megasas_isr_fusion(int irq, void *devp)
3792 {
3793         struct megasas_irq_context *irq_context = devp;
3794         struct megasas_instance *instance = irq_context->instance;
3795         u32 mfiStatus;
3796
3797         if (instance->mask_interrupts)
3798                 return IRQ_NONE;
3799
3800 #if defined(ENABLE_IRQ_POLL)
3801         if (irq_context->irq_poll_scheduled)
3802                 return IRQ_HANDLED;
3803 #endif
3804
3805         if (!instance->msix_vectors) {
3806                 mfiStatus = instance->instancet->clear_intr(instance);
3807                 if (!mfiStatus)
3808                         return IRQ_NONE;
3809         }
3810
3811         /* If we are resetting, bail */
3812         if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
3813                 instance->instancet->clear_intr(instance);
3814                 return IRQ_HANDLED;
3815         }
3816
3817         return complete_cmd_fusion(instance, irq_context->MSIxIndex, irq_context)
3818                         ? IRQ_HANDLED : IRQ_NONE;
3819 }
3820
3821 /**
3822  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
3823  * @instance:                   Adapter soft state
3824  * mfi_cmd:                     megasas_cmd pointer
3825  *
3826  */
3827 static void
3828 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
3829                         struct megasas_cmd *mfi_cmd)
3830 {
3831         struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
3832         struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
3833         struct megasas_cmd_fusion *cmd;
3834         struct fusion_context *fusion;
3835         struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
3836
3837         fusion = instance->ctrl_context;
3838
3839         cmd = megasas_get_cmd_fusion(instance,
3840                         instance->max_scsi_cmds + mfi_cmd->index);
3841
3842         /*  Save the smid. To be used for returning the cmd */
3843         mfi_cmd->context.smid = cmd->index;
3844
3845         /*
3846          * For cmds where the flag is set, store the flag and check
3847          * on completion. For cmds with this flag, don't call
3848          * megasas_complete_cmd
3849          */
3850
3851         if (frame_hdr->flags & cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE))
3852                 mfi_cmd->flags |= DRV_DCMD_POLLED_MODE;
3853
3854         io_req = cmd->io_request;
3855
3856         if (instance->adapter_type >= INVADER_SERIES) {
3857                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
3858                         (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
3859                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
3860                 sgl_ptr_end->Flags = 0;
3861         }
3862
3863         mpi25_ieee_chain =
3864           (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
3865
3866         io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
3867         io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
3868                                        SGL) / 4;
3869         io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
3870
3871         mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr);
3872
3873         mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
3874                 MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
3875
3876         mpi25_ieee_chain->Length = cpu_to_le32(instance->mfi_frame_size);
3877 }
3878
3879 /**
3880  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
3881  * @instance:                   Adapter soft state
3882  * @cmd:                        mfi cmd to build
3883  *
3884  */
3885 static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
3886 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
3887 {
3888         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc = NULL;
3889         u16 index;
3890
3891         build_mpt_mfi_pass_thru(instance, cmd);
3892         index = cmd->context.smid;
3893
3894         req_desc = megasas_get_request_descriptor(instance, index - 1);
3895
3896         req_desc->Words = 0;
3897         req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3898                                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3899
3900         req_desc->SCSIIO.SMID = cpu_to_le16(index);
3901
3902         return req_desc;
3903 }
3904
3905 /**
3906  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
3907  * @instance:                   Adapter soft state
3908  * @cmd:                        mfi cmd pointer
3909  *
3910  */
3911 static void
3912 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
3913                           struct megasas_cmd *cmd)
3914 {
3915         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
3916
3917         req_desc = build_mpt_cmd(instance, cmd);
3918
3919         megasas_fire_cmd_fusion(instance, req_desc);
3920         return;
3921 }
3922
3923 /**
3924  * megasas_release_fusion -     Reverses the FW initialization
3925  * @instance:                   Adapter soft state
3926  */
3927 void
3928 megasas_release_fusion(struct megasas_instance *instance)
3929 {
3930         megasas_free_ioc_init_cmd(instance);
3931         megasas_free_cmds(instance);
3932         megasas_free_cmds_fusion(instance);
3933
3934         iounmap(instance->reg_set);
3935
3936         pci_release_selected_regions(instance->pdev, 1<<instance->bar);
3937 }
3938
3939 /**
3940  * megasas_read_fw_status_reg_fusion - returns the current FW status value
3941  * @regs:                       MFI register set
3942  */
3943 static u32
3944 megasas_read_fw_status_reg_fusion(struct megasas_instance *instance)
3945 {
3946         return megasas_readl(instance, &instance->reg_set->outbound_scratch_pad_0);
3947 }
3948
3949 /**
3950  * megasas_alloc_host_crash_buffer -    Host buffers for Crash dump collection from Firmware
3951  * @instance:                           Controller's soft instance
3952  * return:                              Number of allocated host crash buffers
3953  */
3954 static void
3955 megasas_alloc_host_crash_buffer(struct megasas_instance *instance)
3956 {
3957         unsigned int i;
3958
3959         for (i = 0; i < MAX_CRASH_DUMP_SIZE; i++) {
3960                 instance->crash_buf[i] = vzalloc(CRASH_DMA_BUF_SIZE);
3961                 if (!instance->crash_buf[i]) {
3962                         dev_info(&instance->pdev->dev, "Firmware crash dump "
3963                                 "memory allocation failed at index %d\n", i);
3964                         break;
3965                 }
3966         }
3967         instance->drv_buf_alloc = i;
3968 }
3969
3970 /**
3971  * megasas_free_host_crash_buffer -     Host buffers for Crash dump collection from Firmware
3972  * @instance:                           Controller's soft instance
3973  */
3974 void
3975 megasas_free_host_crash_buffer(struct megasas_instance *instance)
3976 {
3977         unsigned int i;
3978         for (i = 0; i < instance->drv_buf_alloc; i++) {
3979                 if (instance->crash_buf[i])
3980                         vfree(instance->crash_buf[i]);
3981         }
3982         instance->drv_buf_index = 0;
3983         instance->drv_buf_alloc = 0;
3984         instance->fw_crash_state = UNAVAILABLE;
3985         instance->fw_crash_buffer_size = 0;
3986 }
3987
3988 /**
3989  * megasas_adp_reset_fusion -   For controller reset
3990  * @regs:                               MFI register set
3991  */
3992 static int
3993 megasas_adp_reset_fusion(struct megasas_instance *instance,
3994                          struct megasas_register_set __iomem *regs)
3995 {
3996         u32 host_diag, abs_state, retry;
3997
3998         /* Now try to reset the chip */
3999         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4000         writel(MPI2_WRSEQ_1ST_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4001         writel(MPI2_WRSEQ_2ND_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4002         writel(MPI2_WRSEQ_3RD_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4003         writel(MPI2_WRSEQ_4TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4004         writel(MPI2_WRSEQ_5TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4005         writel(MPI2_WRSEQ_6TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
4006
4007         /* Check that the diag write enable (DRWE) bit is on */
4008         host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag);
4009         retry = 0;
4010         while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
4011                 msleep(100);
4012                 host_diag = megasas_readl(instance,
4013                                           &instance->reg_set->fusion_host_diag);
4014                 if (retry++ == 100) {
4015                         dev_warn(&instance->pdev->dev,
4016                                 "Host diag unlock failed from %s %d\n",
4017                                 __func__, __LINE__);
4018                         break;
4019                 }
4020         }
4021         if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
4022                 return -1;
4023
4024         /* Send chip reset command */
4025         writel(host_diag | HOST_DIAG_RESET_ADAPTER,
4026                 &instance->reg_set->fusion_host_diag);
4027         msleep(3000);
4028
4029         /* Make sure reset adapter bit is cleared */
4030         host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag);
4031         retry = 0;
4032         while (host_diag & HOST_DIAG_RESET_ADAPTER) {
4033                 msleep(100);
4034                 host_diag = megasas_readl(instance,
4035                                           &instance->reg_set->fusion_host_diag);
4036                 if (retry++ == 1000) {
4037                         dev_warn(&instance->pdev->dev,
4038                                 "Diag reset adapter never cleared %s %d\n",
4039                                 __func__, __LINE__);
4040                         break;
4041                 }
4042         }
4043         if (host_diag & HOST_DIAG_RESET_ADAPTER)
4044                 return -1;
4045
4046         abs_state = instance->instancet->read_fw_status_reg(instance)
4047                         & MFI_STATE_MASK;
4048         retry = 0;
4049
4050         while ((abs_state <= MFI_STATE_FW_INIT) && (retry++ < 1000)) {
4051                 msleep(100);
4052                 abs_state = instance->instancet->
4053                         read_fw_status_reg(instance) & MFI_STATE_MASK;
4054         }
4055         if (abs_state <= MFI_STATE_FW_INIT) {
4056                 dev_warn(&instance->pdev->dev,
4057                         "fw state < MFI_STATE_FW_INIT, state = 0x%x %s %d\n",
4058                         abs_state, __func__, __LINE__);
4059                 return -1;
4060         }
4061
4062         return 0;
4063 }
4064
4065 /**
4066  * megasas_check_reset_fusion - For controller reset check
4067  * @regs:                               MFI register set
4068  */
4069 static int
4070 megasas_check_reset_fusion(struct megasas_instance *instance,
4071                            struct megasas_register_set __iomem *regs)
4072 {
4073         return 0;
4074 }
4075
4076 /**
4077  * megasas_trigger_snap_dump -  Trigger snap dump in FW
4078  * @instance:                   Soft instance of adapter
4079  */
4080 static inline void megasas_trigger_snap_dump(struct megasas_instance *instance)
4081 {
4082         int j;
4083         u32 fw_state, abs_state;
4084
4085         if (!instance->disableOnlineCtrlReset) {
4086                 dev_info(&instance->pdev->dev, "Trigger snap dump\n");
4087                 writel(MFI_ADP_TRIGGER_SNAP_DUMP,
4088                        &instance->reg_set->doorbell);
4089                 readl(&instance->reg_set->doorbell);
4090         }
4091
4092         for (j = 0; j < instance->snapdump_wait_time; j++) {
4093                 abs_state = instance->instancet->read_fw_status_reg(instance);
4094                 fw_state = abs_state & MFI_STATE_MASK;
4095                 if (fw_state == MFI_STATE_FAULT) {
4096                         dev_printk(KERN_ERR, &instance->pdev->dev,
4097                                    "FW in FAULT state Fault code:0x%x subcode:0x%x func:%s\n",
4098                                    abs_state & MFI_STATE_FAULT_CODE,
4099                                    abs_state & MFI_STATE_FAULT_SUBCODE, __func__);
4100                         return;
4101                 }
4102                 msleep(1000);
4103         }
4104 }
4105
4106 /* This function waits for outstanding commands on fusion to complete */
4107 static int
4108 megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
4109                                     int reason, int *convert)
4110 {
4111         int i, outstanding, retval = 0, hb_seconds_missed = 0;
4112         u32 fw_state, abs_state;
4113         u32 waittime_for_io_completion;
4114
4115         waittime_for_io_completion =
4116                 min_t(u32, resetwaittime,
4117                         (resetwaittime - instance->snapdump_wait_time));
4118
4119         if (reason == MFI_IO_TIMEOUT_OCR) {
4120                 dev_info(&instance->pdev->dev,
4121                         "MFI command is timed out\n");
4122                 megasas_complete_cmd_dpc_fusion((unsigned long)instance);
4123                 if (instance->snapdump_wait_time)
4124                         megasas_trigger_snap_dump(instance);
4125                 retval = 1;
4126                 goto out;
4127         }
4128
4129         for (i = 0; i < waittime_for_io_completion; i++) {
4130                 /* Check if firmware is in fault state */
4131                 abs_state = instance->instancet->read_fw_status_reg(instance);
4132                 fw_state = abs_state & MFI_STATE_MASK;
4133                 if (fw_state == MFI_STATE_FAULT) {
4134                         dev_printk(KERN_ERR, &instance->pdev->dev,
4135                                    "FW in FAULT state Fault code:0x%x subcode:0x%x func:%s\n",
4136                                    abs_state & MFI_STATE_FAULT_CODE,
4137                                    abs_state & MFI_STATE_FAULT_SUBCODE, __func__);
4138                         megasas_complete_cmd_dpc_fusion((unsigned long)instance);
4139                         if (instance->requestorId && reason) {
4140                                 dev_warn(&instance->pdev->dev, "SR-IOV Found FW in FAULT"
4141                                 " state while polling during"
4142                                 " I/O timeout handling for %d\n",
4143                                 instance->host->host_no);
4144                                 *convert = 1;
4145                         }
4146
4147                         retval = 1;
4148                         goto out;
4149                 }
4150
4151
4152                 /* If SR-IOV VF mode & heartbeat timeout, don't wait */
4153                 if (instance->requestorId && !reason) {
4154                         retval = 1;
4155                         goto out;
4156                 }
4157
4158                 /* If SR-IOV VF mode & I/O timeout, check for HB timeout */
4159                 if (instance->requestorId && (reason == SCSIIO_TIMEOUT_OCR)) {
4160                         if (instance->hb_host_mem->HB.fwCounter !=
4161                             instance->hb_host_mem->HB.driverCounter) {
4162                                 instance->hb_host_mem->HB.driverCounter =
4163                                         instance->hb_host_mem->HB.fwCounter;
4164                                 hb_seconds_missed = 0;
4165                         } else {
4166                                 hb_seconds_missed++;
4167                                 if (hb_seconds_missed ==
4168                                     (MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF/HZ)) {
4169                                         dev_warn(&instance->pdev->dev, "SR-IOV:"
4170                                                " Heartbeat never completed "
4171                                                " while polling during I/O "
4172                                                " timeout handling for "
4173                                                "scsi%d.\n",
4174                                                instance->host->host_no);
4175                                                *convert = 1;
4176                                                retval = 1;
4177                                                goto out;
4178                                 }
4179                         }
4180                 }
4181
4182                 megasas_complete_cmd_dpc_fusion((unsigned long)instance);
4183                 outstanding = atomic_read(&instance->fw_outstanding);
4184                 if (!outstanding)
4185                         goto out;
4186
4187                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
4188                         dev_notice(&instance->pdev->dev, "[%2d]waiting for %d "
4189                                "commands to complete for scsi%d\n", i,
4190                                outstanding, instance->host->host_no);
4191                 }
4192                 msleep(1000);
4193         }
4194
4195         if (instance->snapdump_wait_time) {
4196                 megasas_trigger_snap_dump(instance);
4197                 retval = 1;
4198                 goto out;
4199         }
4200
4201         if (atomic_read(&instance->fw_outstanding)) {
4202                 dev_err(&instance->pdev->dev, "pending commands remain after waiting, "
4203                        "will reset adapter scsi%d.\n",
4204                        instance->host->host_no);
4205                 *convert = 1;
4206                 retval = 1;
4207         }
4208
4209 out:
4210         return retval;
4211 }
4212
4213 void  megasas_reset_reply_desc(struct megasas_instance *instance)
4214 {
4215         int i, j, count;
4216         struct fusion_context *fusion;
4217         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
4218
4219         fusion = instance->ctrl_context;
4220         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
4221         for (i = 0 ; i < count ; i++) {
4222                 fusion->last_reply_idx[i] = 0;
4223                 reply_desc = fusion->reply_frames_desc[i];
4224                 for (j = 0 ; j < fusion->reply_q_depth; j++, reply_desc++)
4225                         reply_desc->Words = cpu_to_le64(ULLONG_MAX);
4226         }
4227 }
4228
4229 /*
4230  * megasas_refire_mgmt_cmd :    Re-fire management commands
4231  * @instance:                           Controller's soft instance
4232 */
4233 void megasas_refire_mgmt_cmd(struct megasas_instance *instance,
4234                              bool return_ioctl)
4235 {
4236         int j;
4237         struct megasas_cmd_fusion *cmd_fusion;
4238         struct fusion_context *fusion;
4239         struct megasas_cmd *cmd_mfi;
4240         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
4241         u16 smid;
4242         bool refire_cmd = 0;
4243         u8 result;
4244         u32 opcode = 0;
4245
4246         fusion = instance->ctrl_context;
4247
4248         /* Re-fire management commands.
4249          * Do not traverse complet MPT frame pool. Start from max_scsi_cmds.
4250          */
4251         for (j = instance->max_scsi_cmds ; j < instance->max_fw_cmds; j++) {
4252                 cmd_fusion = fusion->cmd_list[j];
4253                 cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
4254                 smid = le16_to_cpu(cmd_mfi->context.smid);
4255                 result = REFIRE_CMD;
4256
4257                 if (!smid)
4258                         continue;
4259
4260                 req_desc = megasas_get_request_descriptor(instance, smid - 1);
4261
4262                 switch (cmd_mfi->frame->hdr.cmd) {
4263                 case MFI_CMD_DCMD:
4264                         opcode = le32_to_cpu(cmd_mfi->frame->dcmd.opcode);
4265                          /* Do not refire shutdown command */
4266                         if (opcode == MR_DCMD_CTRL_SHUTDOWN) {
4267                                 cmd_mfi->frame->dcmd.cmd_status = MFI_STAT_OK;
4268                                 result = COMPLETE_CMD;
4269                                 break;
4270                         }
4271
4272                         refire_cmd = ((opcode != MR_DCMD_LD_MAP_GET_INFO)) &&
4273                                       (opcode != MR_DCMD_SYSTEM_PD_MAP_GET_INFO) &&
4274                                       !(cmd_mfi->flags & DRV_DCMD_SKIP_REFIRE);
4275
4276                         if (!refire_cmd)
4277                                 result = RETURN_CMD;
4278
4279                         break;
4280                 case MFI_CMD_NVME:
4281                         if (!instance->support_nvme_passthru) {
4282                                 cmd_mfi->frame->hdr.cmd_status = MFI_STAT_INVALID_CMD;
4283                                 result = COMPLETE_CMD;
4284                         }
4285
4286                         break;
4287                 case MFI_CMD_TOOLBOX:
4288                         if (!instance->support_pci_lane_margining) {
4289                                 cmd_mfi->frame->hdr.cmd_status = MFI_STAT_INVALID_CMD;
4290                                 result = COMPLETE_CMD;
4291                         }
4292
4293                         break;
4294                 default:
4295                         break;
4296                 }
4297
4298                 if (return_ioctl && cmd_mfi->sync_cmd &&
4299                     cmd_mfi->frame->hdr.cmd != MFI_CMD_ABORT) {
4300                         dev_err(&instance->pdev->dev,
4301                                 "return -EBUSY from %s %d cmd 0x%x opcode 0x%x\n",
4302                                 __func__, __LINE__, cmd_mfi->frame->hdr.cmd,
4303                                 le32_to_cpu(cmd_mfi->frame->dcmd.opcode));
4304                         cmd_mfi->cmd_status_drv = DCMD_BUSY;
4305                         result = COMPLETE_CMD;
4306                 }
4307
4308                 switch (result) {
4309                 case REFIRE_CMD:
4310                         megasas_fire_cmd_fusion(instance, req_desc);
4311                         break;
4312                 case RETURN_CMD:
4313                         megasas_return_cmd(instance, cmd_mfi);
4314                         break;
4315                 case COMPLETE_CMD:
4316                         megasas_complete_cmd(instance, cmd_mfi, DID_OK);
4317                         break;
4318                 }
4319         }
4320 }
4321
4322 /*
4323  * megasas_return_polled_cmds: Return polled mode commands back to the pool
4324  *                             before initiating an OCR.
4325  * @instance:                  Controller's soft instance
4326  */
4327 static void
4328 megasas_return_polled_cmds(struct megasas_instance *instance)
4329 {
4330         int i;
4331         struct megasas_cmd_fusion *cmd_fusion;
4332         struct fusion_context *fusion;
4333         struct megasas_cmd *cmd_mfi;
4334
4335         fusion = instance->ctrl_context;
4336
4337         for (i = instance->max_scsi_cmds; i < instance->max_fw_cmds; i++) {
4338                 cmd_fusion = fusion->cmd_list[i];
4339                 cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
4340
4341                 if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) {
4342                         if (megasas_dbg_lvl & OCR_DEBUG)
4343                                 dev_info(&instance->pdev->dev,
4344                                          "%s %d return cmd 0x%x opcode 0x%x\n",
4345                                          __func__, __LINE__, cmd_mfi->frame->hdr.cmd,
4346                                          le32_to_cpu(cmd_mfi->frame->dcmd.opcode));
4347                         cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE;
4348                         megasas_return_cmd(instance, cmd_mfi);
4349                 }
4350         }
4351 }
4352
4353 /*
4354  * megasas_track_scsiio : Track SCSI IOs outstanding to a SCSI device
4355  * @instance: per adapter struct
4356  * @channel: the channel assigned by the OS
4357  * @id: the id assigned by the OS
4358  *
4359  * Returns SUCCESS if no IOs pending to SCSI device, else return FAILED
4360  */
4361
4362 static int megasas_track_scsiio(struct megasas_instance *instance,
4363                 int id, int channel)
4364 {
4365         int i, found = 0;
4366         struct megasas_cmd_fusion *cmd_fusion;
4367         struct fusion_context *fusion;
4368         fusion = instance->ctrl_context;
4369
4370         for (i = 0 ; i < instance->max_scsi_cmds; i++) {
4371                 cmd_fusion = fusion->cmd_list[i];
4372                 if (cmd_fusion->scmd &&
4373                         (cmd_fusion->scmd->device->id == id &&
4374                         cmd_fusion->scmd->device->channel == channel)) {
4375                         dev_info(&instance->pdev->dev,
4376                                 "SCSI commands pending to target"
4377                                 "channel %d id %d \tSMID: 0x%x\n",
4378                                 channel, id, cmd_fusion->index);
4379                         scsi_print_command(cmd_fusion->scmd);
4380                         found = 1;
4381                         break;
4382                 }
4383         }
4384
4385         return found ? FAILED : SUCCESS;
4386 }
4387
4388 /**
4389  * megasas_tm_response_code - translation of device response code
4390  * @ioc: per adapter object
4391  * @mpi_reply: MPI reply returned by firmware
4392  *
4393  * Return nothing.
4394  */
4395 static void
4396 megasas_tm_response_code(struct megasas_instance *instance,
4397                 struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply)
4398 {
4399         char *desc;
4400
4401         switch (mpi_reply->ResponseCode) {
4402         case MPI2_SCSITASKMGMT_RSP_TM_COMPLETE:
4403                 desc = "task management request completed";
4404                 break;
4405         case MPI2_SCSITASKMGMT_RSP_INVALID_FRAME:
4406                 desc = "invalid frame";
4407                 break;
4408         case MPI2_SCSITASKMGMT_RSP_TM_NOT_SUPPORTED:
4409                 desc = "task management request not supported";
4410                 break;
4411         case MPI2_SCSITASKMGMT_RSP_TM_FAILED:
4412                 desc = "task management request failed";
4413                 break;
4414         case MPI2_SCSITASKMGMT_RSP_TM_SUCCEEDED:
4415                 desc = "task management request succeeded";
4416                 break;
4417         case MPI2_SCSITASKMGMT_RSP_TM_INVALID_LUN:
4418                 desc = "invalid lun";
4419                 break;
4420         case 0xA:
4421                 desc = "overlapped tag attempted";
4422                 break;
4423         case MPI2_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC:
4424                 desc = "task queued, however not sent to target";
4425                 break;
4426         default:
4427                 desc = "unknown";
4428                 break;
4429         }
4430         dev_dbg(&instance->pdev->dev, "response_code(%01x): %s\n",
4431                 mpi_reply->ResponseCode, desc);
4432         dev_dbg(&instance->pdev->dev,
4433                 "TerminationCount/DevHandle/Function/TaskType/IOCStat/IOCLoginfo"
4434                 " 0x%x/0x%x/0x%x/0x%x/0x%x/0x%x\n",
4435                 mpi_reply->TerminationCount, mpi_reply->DevHandle,
4436                 mpi_reply->Function, mpi_reply->TaskType,
4437                 mpi_reply->IOCStatus, mpi_reply->IOCLogInfo);
4438 }
4439
4440 /**
4441  * megasas_issue_tm - main routine for sending tm requests
4442  * @instance: per adapter struct
4443  * @device_handle: device handle
4444  * @channel: the channel assigned by the OS
4445  * @id: the id assigned by the OS
4446  * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in megaraid_sas_fusion.c)
4447  * @smid_task: smid assigned to the task
4448  * @m_type: TM_MUTEX_ON or TM_MUTEX_OFF
4449  * Context: user
4450  *
4451  * MegaRaid use MPT interface for Task Magement request.
4452  * A generic API for sending task management requests to firmware.
4453  *
4454  * Return SUCCESS or FAILED.
4455  */
4456 static int
4457 megasas_issue_tm(struct megasas_instance *instance, u16 device_handle,
4458         uint channel, uint id, u16 smid_task, u8 type,
4459         struct MR_PRIV_DEVICE *mr_device_priv_data)
4460 {
4461         struct MR_TASK_MANAGE_REQUEST *mr_request;
4462         struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_request;
4463         unsigned long timeleft;
4464         struct megasas_cmd_fusion *cmd_fusion;
4465         struct megasas_cmd *cmd_mfi;
4466         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
4467         struct fusion_context *fusion = NULL;
4468         struct megasas_cmd_fusion *scsi_lookup;
4469         int rc;
4470         int timeout = MEGASAS_DEFAULT_TM_TIMEOUT;
4471         struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply;
4472
4473         fusion = instance->ctrl_context;
4474
4475         cmd_mfi = megasas_get_cmd(instance);
4476
4477         if (!cmd_mfi) {
4478                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
4479                         __func__, __LINE__);
4480                 return -ENOMEM;
4481         }
4482
4483         cmd_fusion = megasas_get_cmd_fusion(instance,
4484                         instance->max_scsi_cmds + cmd_mfi->index);
4485
4486         /*  Save the smid. To be used for returning the cmd */
4487         cmd_mfi->context.smid = cmd_fusion->index;
4488
4489         req_desc = megasas_get_request_descriptor(instance,
4490                         (cmd_fusion->index - 1));
4491
4492         cmd_fusion->request_desc = req_desc;
4493         req_desc->Words = 0;
4494
4495         mr_request = (struct MR_TASK_MANAGE_REQUEST *) cmd_fusion->io_request;
4496         memset(mr_request, 0, sizeof(struct MR_TASK_MANAGE_REQUEST));
4497         mpi_request = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *) &mr_request->TmRequest;
4498         mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
4499         mpi_request->DevHandle = cpu_to_le16(device_handle);
4500         mpi_request->TaskType = type;
4501         mpi_request->TaskMID = cpu_to_le16(smid_task);
4502         mpi_request->LUN[1] = 0;
4503
4504
4505         req_desc = cmd_fusion->request_desc;
4506         req_desc->HighPriority.SMID = cpu_to_le16(cmd_fusion->index);
4507         req_desc->HighPriority.RequestFlags =
4508                 (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
4509                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
4510         req_desc->HighPriority.MSIxIndex =  0;
4511         req_desc->HighPriority.LMID = 0;
4512         req_desc->HighPriority.Reserved1 = 0;
4513
4514         if (channel < MEGASAS_MAX_PD_CHANNELS)
4515                 mr_request->tmReqFlags.isTMForPD = 1;
4516         else
4517                 mr_request->tmReqFlags.isTMForLD = 1;
4518
4519         init_completion(&cmd_fusion->done);
4520         megasas_fire_cmd_fusion(instance, req_desc);
4521
4522         switch (type) {
4523         case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
4524                 timeout = mr_device_priv_data->task_abort_tmo;
4525                 break;
4526         case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
4527                 timeout = mr_device_priv_data->target_reset_tmo;
4528                 break;
4529         }
4530
4531         timeleft = wait_for_completion_timeout(&cmd_fusion->done, timeout * HZ);
4532
4533         if (!timeleft) {
4534                 dev_err(&instance->pdev->dev,
4535                         "task mgmt type 0x%x timed out\n", type);
4536                 cmd_mfi->flags |= DRV_DCMD_SKIP_REFIRE;
4537                 mutex_unlock(&instance->reset_mutex);
4538                 rc = megasas_reset_fusion(instance->host, MFI_IO_TIMEOUT_OCR);
4539                 mutex_lock(&instance->reset_mutex);
4540                 return rc;
4541         }
4542
4543         mpi_reply = (struct MPI2_SCSI_TASK_MANAGE_REPLY *) &mr_request->TMReply;
4544         megasas_tm_response_code(instance, mpi_reply);
4545
4546         megasas_return_cmd(instance, cmd_mfi);
4547         rc = SUCCESS;
4548         switch (type) {
4549         case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
4550                 scsi_lookup = fusion->cmd_list[smid_task - 1];
4551
4552                 if (scsi_lookup->scmd == NULL)
4553                         break;
4554                 else {
4555                         instance->instancet->disable_intr(instance);
4556                         megasas_sync_irqs((unsigned long)instance);
4557                         instance->instancet->enable_intr(instance);
4558                         megasas_enable_irq_poll(instance);
4559                         if (scsi_lookup->scmd == NULL)
4560                                 break;
4561                 }
4562                 rc = FAILED;
4563                 break;
4564
4565         case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
4566                 if ((channel == 0xFFFFFFFF) && (id == 0xFFFFFFFF))
4567                         break;
4568                 instance->instancet->disable_intr(instance);
4569                 megasas_sync_irqs((unsigned long)instance);
4570                 rc = megasas_track_scsiio(instance, id, channel);
4571                 instance->instancet->enable_intr(instance);
4572                 megasas_enable_irq_poll(instance);
4573
4574                 break;
4575         case MPI2_SCSITASKMGMT_TASKTYPE_ABRT_TASK_SET:
4576         case MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK:
4577                 break;
4578         default:
4579                 rc = FAILED;
4580                 break;
4581         }
4582
4583         return rc;
4584
4585 }
4586
4587 /*
4588  * megasas_fusion_smid_lookup : Look for fusion command correpspodning to SCSI
4589  * @instance: per adapter struct
4590  *
4591  * Return Non Zero index, if SMID found in outstanding commands
4592  */
4593 static u16 megasas_fusion_smid_lookup(struct scsi_cmnd *scmd)
4594 {
4595         int i, ret = 0;
4596         struct megasas_instance *instance;
4597         struct megasas_cmd_fusion *cmd_fusion;
4598         struct fusion_context *fusion;
4599
4600         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4601
4602         fusion = instance->ctrl_context;
4603
4604         for (i = 0; i < instance->max_scsi_cmds; i++) {
4605                 cmd_fusion = fusion->cmd_list[i];
4606                 if (cmd_fusion->scmd && (cmd_fusion->scmd == scmd)) {
4607                         scmd_printk(KERN_NOTICE, scmd, "Abort request is for"
4608                                 " SMID: %d\n", cmd_fusion->index);
4609                         ret = cmd_fusion->index;
4610                         break;
4611                 }
4612         }
4613
4614         return ret;
4615 }
4616
4617 /*
4618 * megasas_get_tm_devhandle - Get devhandle for TM request
4619 * @sdev-                     OS provided scsi device
4620 *
4621 * Returns-                   devhandle/targetID of SCSI device
4622 */
4623 static u16 megasas_get_tm_devhandle(struct scsi_device *sdev)
4624 {
4625         u16 pd_index = 0;
4626         u32 device_id;
4627         struct megasas_instance *instance;
4628         struct fusion_context *fusion;
4629         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
4630         u16 devhandle = (u16)ULONG_MAX;
4631
4632         instance = (struct megasas_instance *)sdev->host->hostdata;
4633         fusion = instance->ctrl_context;
4634
4635         if (!MEGASAS_IS_LOGICAL(sdev)) {
4636                 if (instance->use_seqnum_jbod_fp) {
4637                         pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
4638                                     + sdev->id;
4639                         pd_sync = (void *)fusion->pd_seq_sync
4640                                         [(instance->pd_seq_map_id - 1) & 1];
4641                         devhandle = pd_sync->seq[pd_index].devHandle;
4642                 } else
4643                         sdev_printk(KERN_ERR, sdev, "Firmware expose tmCapable"
4644                                 " without JBOD MAP support from %s %d\n", __func__, __LINE__);
4645         } else {
4646                 device_id = ((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL)
4647                                 + sdev->id;
4648                 devhandle = device_id;
4649         }
4650
4651         return devhandle;
4652 }
4653
4654 /*
4655  * megasas_task_abort_fusion : SCSI task abort function for fusion adapters
4656  * @scmd : pointer to scsi command object
4657  *
4658  * Return SUCCESS, if command aborted else FAILED
4659  */
4660
4661 int megasas_task_abort_fusion(struct scsi_cmnd *scmd)
4662 {
4663         struct megasas_instance *instance;
4664         u16 smid, devhandle;
4665         int ret;
4666         struct MR_PRIV_DEVICE *mr_device_priv_data;
4667         mr_device_priv_data = scmd->device->hostdata;
4668
4669         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4670
4671         if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
4672                 dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL,"
4673                 "SCSI host:%d\n", instance->host->host_no);
4674                 ret = FAILED;
4675                 return ret;
4676         }
4677
4678         if (!mr_device_priv_data) {
4679                 sdev_printk(KERN_INFO, scmd->device, "device been deleted! "
4680                         "scmd(%p)\n", scmd);
4681                 scmd->result = DID_NO_CONNECT << 16;
4682                 ret = SUCCESS;
4683                 goto out;
4684         }
4685
4686         if (!mr_device_priv_data->is_tm_capable) {
4687                 ret = FAILED;
4688                 goto out;
4689         }
4690
4691         mutex_lock(&instance->reset_mutex);
4692
4693         smid = megasas_fusion_smid_lookup(scmd);
4694
4695         if (!smid) {
4696                 ret = SUCCESS;
4697                 scmd_printk(KERN_NOTICE, scmd, "Command for which abort is"
4698                         " issued is not found in outstanding commands\n");
4699                 mutex_unlock(&instance->reset_mutex);
4700                 goto out;
4701         }
4702
4703         devhandle = megasas_get_tm_devhandle(scmd->device);
4704
4705         if (devhandle == (u16)ULONG_MAX) {
4706                 ret = SUCCESS;
4707                 sdev_printk(KERN_INFO, scmd->device,
4708                         "task abort issued for invalid devhandle\n");
4709                 mutex_unlock(&instance->reset_mutex);
4710                 goto out;
4711         }
4712         sdev_printk(KERN_INFO, scmd->device,
4713                 "attempting task abort! scmd(0x%p) tm_dev_handle 0x%x\n",
4714                 scmd, devhandle);
4715
4716         mr_device_priv_data->tm_busy = 1;
4717         ret = megasas_issue_tm(instance, devhandle,
4718                         scmd->device->channel, scmd->device->id, smid,
4719                         MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK,
4720                         mr_device_priv_data);
4721         mr_device_priv_data->tm_busy = 0;
4722
4723         mutex_unlock(&instance->reset_mutex);
4724         scmd_printk(KERN_INFO, scmd, "task abort %s!! scmd(0x%p)\n",
4725                         ((ret == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);
4726 out:
4727         scsi_print_command(scmd);
4728         if (megasas_dbg_lvl & TM_DEBUG)
4729                 megasas_dump_fusion_io(scmd);
4730
4731         return ret;
4732 }
4733
4734 /*
4735  * megasas_reset_target_fusion : target reset function for fusion adapters
4736  * scmd: SCSI command pointer
4737  *
4738  * Returns SUCCESS if all commands associated with target aborted else FAILED
4739  */
4740
4741 int megasas_reset_target_fusion(struct scsi_cmnd *scmd)
4742 {
4743
4744         struct megasas_instance *instance;
4745         int ret = FAILED;
4746         u16 devhandle;
4747         struct MR_PRIV_DEVICE *mr_device_priv_data;
4748         mr_device_priv_data = scmd->device->hostdata;
4749
4750         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4751
4752         if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
4753                 dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL,"
4754                 "SCSI host:%d\n", instance->host->host_no);
4755                 ret = FAILED;
4756                 return ret;
4757         }
4758
4759         if (!mr_device_priv_data) {
4760                 sdev_printk(KERN_INFO, scmd->device,
4761                             "device been deleted! scmd: (0x%p)\n", scmd);
4762                 scmd->result = DID_NO_CONNECT << 16;
4763                 ret = SUCCESS;
4764                 goto out;
4765         }
4766
4767         if (!mr_device_priv_data->is_tm_capable) {
4768                 ret = FAILED;
4769                 goto out;
4770         }
4771
4772         mutex_lock(&instance->reset_mutex);
4773         devhandle = megasas_get_tm_devhandle(scmd->device);
4774
4775         if (devhandle == (u16)ULONG_MAX) {
4776                 ret = SUCCESS;
4777                 sdev_printk(KERN_INFO, scmd->device,
4778                         "target reset issued for invalid devhandle\n");
4779                 mutex_unlock(&instance->reset_mutex);
4780                 goto out;
4781         }
4782
4783         sdev_printk(KERN_INFO, scmd->device,
4784                 "attempting target reset! scmd(0x%p) tm_dev_handle: 0x%x\n",
4785                 scmd, devhandle);
4786         mr_device_priv_data->tm_busy = 1;
4787         ret = megasas_issue_tm(instance, devhandle,
4788                         scmd->device->channel, scmd->device->id, 0,
4789                         MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET,
4790                         mr_device_priv_data);
4791         mr_device_priv_data->tm_busy = 0;
4792         mutex_unlock(&instance->reset_mutex);
4793         scmd_printk(KERN_NOTICE, scmd, "target reset %s!!\n",
4794                 (ret == SUCCESS) ? "SUCCESS" : "FAILED");
4795
4796 out:
4797         return ret;
4798 }
4799
4800 /*SRIOV get other instance in cluster if any*/
4801 static struct
4802 megasas_instance *megasas_get_peer_instance(struct megasas_instance *instance)
4803 {
4804         int i;
4805
4806         for (i = 0; i < MAX_MGMT_ADAPTERS; i++) {
4807                 if (megasas_mgmt_info.instance[i] &&
4808                         (megasas_mgmt_info.instance[i] != instance) &&
4809                          megasas_mgmt_info.instance[i]->requestorId &&
4810                          megasas_mgmt_info.instance[i]->peerIsPresent &&
4811                         (memcmp((megasas_mgmt_info.instance[i]->clusterId),
4812                         instance->clusterId, MEGASAS_CLUSTER_ID_SIZE) == 0))
4813                         return megasas_mgmt_info.instance[i];
4814         }
4815         return NULL;
4816 }
4817
4818 /* Check for a second path that is currently UP */
4819 int megasas_check_mpio_paths(struct megasas_instance *instance,
4820         struct scsi_cmnd *scmd)
4821 {
4822         struct megasas_instance *peer_instance = NULL;
4823         int retval = (DID_REQUEUE << 16);
4824
4825         if (instance->peerIsPresent) {
4826                 peer_instance = megasas_get_peer_instance(instance);
4827                 if ((peer_instance) &&
4828                         (atomic_read(&peer_instance->adprecovery) ==
4829                         MEGASAS_HBA_OPERATIONAL))
4830                         retval = (DID_NO_CONNECT << 16);
4831         }
4832         return retval;
4833 }
4834
4835 /* Core fusion reset function */
4836 int megasas_reset_fusion(struct Scsi_Host *shost, int reason)
4837 {
4838         int retval = SUCCESS, i, j, convert = 0;
4839         struct megasas_instance *instance;
4840         struct megasas_cmd_fusion *cmd_fusion, *r1_cmd;
4841         struct fusion_context *fusion;
4842         u32 abs_state, status_reg, reset_adapter, fpio_count = 0;
4843         u32 io_timeout_in_crash_mode = 0;
4844         struct scsi_cmnd *scmd_local = NULL;
4845         struct scsi_device *sdev;
4846         int ret_target_prop = DCMD_FAILED;
4847         bool is_target_prop = false;
4848         bool do_adp_reset = true;
4849         int max_reset_tries = MEGASAS_FUSION_MAX_RESET_TRIES;
4850
4851         instance = (struct megasas_instance *)shost->hostdata;
4852         fusion = instance->ctrl_context;
4853
4854         mutex_lock(&instance->reset_mutex);
4855
4856         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
4857                 dev_warn(&instance->pdev->dev, "Hardware critical error, "
4858                        "returning FAILED for scsi%d.\n",
4859                         instance->host->host_no);
4860                 mutex_unlock(&instance->reset_mutex);
4861                 return FAILED;
4862         }
4863         status_reg = instance->instancet->read_fw_status_reg(instance);
4864         abs_state = status_reg & MFI_STATE_MASK;
4865
4866         /* IO timeout detected, forcibly put FW in FAULT state */
4867         if (abs_state != MFI_STATE_FAULT && instance->crash_dump_buf &&
4868                 instance->crash_dump_app_support && reason) {
4869                 dev_info(&instance->pdev->dev, "IO/DCMD timeout is detected, "
4870                         "forcibly FAULT Firmware\n");
4871                 atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
4872                 status_reg = megasas_readl(instance, &instance->reg_set->doorbell);
4873                 writel(status_reg | MFI_STATE_FORCE_OCR,
4874                         &instance->reg_set->doorbell);
4875                 readl(&instance->reg_set->doorbell);
4876                 mutex_unlock(&instance->reset_mutex);
4877                 do {
4878                         ssleep(3);
4879                         io_timeout_in_crash_mode++;
4880                         dev_dbg(&instance->pdev->dev, "waiting for [%d] "
4881                                 "seconds for crash dump collection and OCR "
4882                                 "to be done\n", (io_timeout_in_crash_mode * 3));
4883                 } while ((atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) &&
4884                         (io_timeout_in_crash_mode < 80));
4885
4886                 if (atomic_read(&instance->adprecovery) == MEGASAS_HBA_OPERATIONAL) {
4887                         dev_info(&instance->pdev->dev, "OCR done for IO "
4888                                 "timeout case\n");
4889                         retval = SUCCESS;
4890                 } else {
4891                         dev_info(&instance->pdev->dev, "Controller is not "
4892                                 "operational after 240 seconds wait for IO "
4893                                 "timeout case in FW crash dump mode\n do "
4894                                 "OCR/kill adapter\n");
4895                         retval = megasas_reset_fusion(shost, 0);
4896                 }
4897                 return retval;
4898         }
4899
4900         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
4901                 del_timer_sync(&instance->sriov_heartbeat_timer);
4902         set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
4903         set_bit(MEGASAS_FUSION_OCR_NOT_POSSIBLE, &instance->reset_flags);
4904         atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_POLLING);
4905         instance->instancet->disable_intr(instance);
4906         megasas_sync_irqs((unsigned long)instance);
4907
4908         /* First try waiting for commands to complete */
4909         if (megasas_wait_for_outstanding_fusion(instance, reason,
4910                                                 &convert)) {
4911                 atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
4912                 dev_warn(&instance->pdev->dev, "resetting fusion "
4913                        "adapter scsi%d.\n", instance->host->host_no);
4914                 if (convert)
4915                         reason = 0;
4916
4917                 if (megasas_dbg_lvl & OCR_DEBUG)
4918                         dev_info(&instance->pdev->dev, "\nPending SCSI commands:\n");
4919
4920                 /* Now return commands back to the OS */
4921                 for (i = 0 ; i < instance->max_scsi_cmds; i++) {
4922                         cmd_fusion = fusion->cmd_list[i];
4923                         /*check for extra commands issued by driver*/
4924                         if (instance->adapter_type >= VENTURA_SERIES) {
4925                                 r1_cmd = fusion->cmd_list[i + instance->max_fw_cmds];
4926                                 megasas_return_cmd_fusion(instance, r1_cmd);
4927                         }
4928                         scmd_local = cmd_fusion->scmd;
4929                         if (cmd_fusion->scmd) {
4930                                 if (megasas_dbg_lvl & OCR_DEBUG) {
4931                                         sdev_printk(KERN_INFO,
4932                                                 cmd_fusion->scmd->device, "SMID: 0x%x\n",
4933                                                 cmd_fusion->index);
4934                                         megasas_dump_fusion_io(cmd_fusion->scmd);
4935                                 }
4936
4937                                 if (cmd_fusion->io_request->Function ==
4938                                         MPI2_FUNCTION_SCSI_IO_REQUEST)
4939                                         fpio_count++;
4940
4941                                 scmd_local->result =
4942                                         megasas_check_mpio_paths(instance,
4943                                                         scmd_local);
4944                                 if (instance->ldio_threshold &&
4945                                         megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
4946                                         atomic_dec(&instance->ldio_outstanding);
4947                                 megasas_return_cmd_fusion(instance, cmd_fusion);
4948                                 scsi_dma_unmap(scmd_local);
4949                                 scmd_local->scsi_done(scmd_local);
4950                         }
4951                 }
4952
4953                 dev_info(&instance->pdev->dev, "Outstanding fastpath IOs: %d\n",
4954                         fpio_count);
4955
4956                 atomic_set(&instance->fw_outstanding, 0);
4957
4958                 status_reg = instance->instancet->read_fw_status_reg(instance);
4959                 abs_state = status_reg & MFI_STATE_MASK;
4960                 reset_adapter = status_reg & MFI_RESET_ADAPTER;
4961                 if (instance->disableOnlineCtrlReset ||
4962                     (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
4963                         /* Reset not supported, kill adapter */
4964                         dev_warn(&instance->pdev->dev, "Reset not supported"
4965                                ", killing adapter scsi%d.\n",
4966                                 instance->host->host_no);
4967                         goto kill_hba;
4968                 }
4969
4970                 /* Let SR-IOV VF & PF sync up if there was a HB failure */
4971                 if (instance->requestorId && !reason) {
4972                         msleep(MEGASAS_OCR_SETTLE_TIME_VF);
4973                         do_adp_reset = false;
4974                         max_reset_tries = MEGASAS_SRIOV_MAX_RESET_TRIES_VF;
4975                 }
4976
4977                 /* Now try to reset the chip */
4978                 for (i = 0; i < max_reset_tries; i++) {
4979                         /*
4980                          * Do adp reset and wait for
4981                          * controller to transition to ready
4982                          */
4983                         if (megasas_adp_reset_wait_for_ready(instance,
4984                                 do_adp_reset, 1) == FAILED)
4985                                 continue;
4986
4987                         /* Wait for FW to become ready */
4988                         if (megasas_transition_to_ready(instance, 1)) {
4989                                 dev_warn(&instance->pdev->dev,
4990                                         "Failed to transition controller to ready for "
4991                                         "scsi%d.\n", instance->host->host_no);
4992                                 continue;
4993                         }
4994                         megasas_reset_reply_desc(instance);
4995                         megasas_fusion_update_can_queue(instance, OCR_CONTEXT);
4996
4997                         if (megasas_ioc_init_fusion(instance)) {
4998                                 continue;
4999                         }
5000
5001                         if (megasas_get_ctrl_info(instance)) {
5002                                 dev_info(&instance->pdev->dev,
5003                                         "Failed from %s %d\n",
5004                                         __func__, __LINE__);
5005                                 goto kill_hba;
5006                         }
5007
5008                         megasas_refire_mgmt_cmd(instance,
5009                                                 (i == (MEGASAS_FUSION_MAX_RESET_TRIES - 1)
5010                                                         ? 1 : 0));
5011
5012                         /* Reset load balance info */
5013                         if (fusion->load_balance_info)
5014                                 memset(fusion->load_balance_info, 0,
5015                                        (sizeof(struct LD_LOAD_BALANCE_INFO) *
5016                                        MAX_LOGICAL_DRIVES_EXT));
5017
5018                         if (!megasas_get_map_info(instance)) {
5019                                 megasas_sync_map_info(instance);
5020                         } else {
5021                                 /*
5022                                  * Return pending polled mode cmds before
5023                                  * retrying OCR
5024                                  */
5025                                 megasas_return_polled_cmds(instance);
5026                                 continue;
5027                         }
5028
5029                         megasas_setup_jbod_map(instance);
5030
5031                         /* reset stream detection array */
5032                         if (instance->adapter_type >= VENTURA_SERIES) {
5033                                 for (j = 0; j < MAX_LOGICAL_DRIVES_EXT; ++j) {
5034                                         memset(fusion->stream_detect_by_ld[j],
5035                                         0, sizeof(struct LD_STREAM_DETECT));
5036                                  fusion->stream_detect_by_ld[j]->mru_bit_map
5037                                                 = MR_STREAM_BITMAP;
5038                                 }
5039                         }
5040
5041                         clear_bit(MEGASAS_FUSION_IN_RESET,
5042                                   &instance->reset_flags);
5043                         instance->instancet->enable_intr(instance);
5044                         megasas_enable_irq_poll(instance);
5045                         shost_for_each_device(sdev, shost) {
5046                                 if ((instance->tgt_prop) &&
5047                                     (instance->nvme_page_size))
5048                                         ret_target_prop = megasas_get_target_prop(instance, sdev);
5049
5050                                 is_target_prop = (ret_target_prop == DCMD_SUCCESS) ? true : false;
5051                                 megasas_set_dynamic_target_properties(sdev, is_target_prop);
5052                         }
5053
5054                         status_reg = instance->instancet->read_fw_status_reg
5055                                         (instance);
5056                         abs_state = status_reg & MFI_STATE_MASK;
5057                         if (abs_state != MFI_STATE_OPERATIONAL) {
5058                                 dev_info(&instance->pdev->dev,
5059                                          "Adapter is not OPERATIONAL, state 0x%x for scsi:%d\n",
5060                                          abs_state, instance->host->host_no);
5061                                 goto out;
5062                         }
5063                         atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
5064
5065                         dev_info(&instance->pdev->dev,
5066                                  "Adapter is OPERATIONAL for scsi:%d\n",
5067                                  instance->host->host_no);
5068
5069                         /* Restart SR-IOV heartbeat */
5070                         if (instance->requestorId) {
5071                                 if (!megasas_sriov_start_heartbeat(instance, 0))
5072                                         megasas_start_timer(instance);
5073                                 else
5074                                         instance->skip_heartbeat_timer_del = 1;
5075                         }
5076
5077                         if (instance->crash_dump_drv_support &&
5078                                 instance->crash_dump_app_support)
5079                                 megasas_set_crash_dump_params(instance,
5080                                         MR_CRASH_BUF_TURN_ON);
5081                         else
5082                                 megasas_set_crash_dump_params(instance,
5083                                         MR_CRASH_BUF_TURN_OFF);
5084
5085                         if (instance->snapdump_wait_time) {
5086                                 megasas_get_snapdump_properties(instance);
5087                                 dev_info(&instance->pdev->dev,
5088                                          "Snap dump wait time\t: %d\n",
5089                                          instance->snapdump_wait_time);
5090                         }
5091
5092                         retval = SUCCESS;
5093
5094                         /* Adapter reset completed successfully */
5095                         dev_warn(&instance->pdev->dev,
5096                                  "Reset successful for scsi%d.\n",
5097                                  instance->host->host_no);
5098
5099                         goto out;
5100                 }
5101                 /* Reset failed, kill the adapter */
5102                 dev_warn(&instance->pdev->dev, "Reset failed, killing "
5103                        "adapter scsi%d.\n", instance->host->host_no);
5104                 goto kill_hba;
5105         } else {
5106                 /* For VF: Restart HB timer if we didn't OCR */
5107                 if (instance->requestorId) {
5108                         megasas_start_timer(instance);
5109                 }
5110                 clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
5111                 instance->instancet->enable_intr(instance);
5112                 megasas_enable_irq_poll(instance);
5113                 atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
5114                 goto out;
5115         }
5116 kill_hba:
5117         megaraid_sas_kill_hba(instance);
5118         megasas_enable_irq_poll(instance);
5119         instance->skip_heartbeat_timer_del = 1;
5120         retval = FAILED;
5121 out:
5122         clear_bit(MEGASAS_FUSION_OCR_NOT_POSSIBLE, &instance->reset_flags);
5123         mutex_unlock(&instance->reset_mutex);
5124         return retval;
5125 }
5126
5127 /* Fusion Crash dump collection */
5128 static void  megasas_fusion_crash_dump(struct megasas_instance *instance)
5129 {
5130         u32 status_reg;
5131         u8 partial_copy = 0;
5132         int wait = 0;
5133
5134
5135         status_reg = instance->instancet->read_fw_status_reg(instance);
5136
5137         /*
5138          * Allocate host crash buffers to copy data from 1 MB DMA crash buffer
5139          * to host crash buffers
5140          */
5141         if (instance->drv_buf_index == 0) {
5142                 /* Buffer is already allocated for old Crash dump.
5143                  * Do OCR and do not wait for crash dump collection
5144                  */
5145                 if (instance->drv_buf_alloc) {
5146                         dev_info(&instance->pdev->dev, "earlier crash dump is "
5147                                 "not yet copied by application, ignoring this "
5148                                 "crash dump and initiating OCR\n");
5149                         status_reg |= MFI_STATE_CRASH_DUMP_DONE;
5150                         writel(status_reg,
5151                                 &instance->reg_set->outbound_scratch_pad_0);
5152                         readl(&instance->reg_set->outbound_scratch_pad_0);
5153                         return;
5154                 }
5155                 megasas_alloc_host_crash_buffer(instance);
5156                 dev_info(&instance->pdev->dev, "Number of host crash buffers "
5157                         "allocated: %d\n", instance->drv_buf_alloc);
5158         }
5159
5160         while (!(status_reg & MFI_STATE_CRASH_DUMP_DONE) &&
5161                (wait < MEGASAS_WATCHDOG_WAIT_COUNT)) {
5162                 if (!(status_reg & MFI_STATE_DMADONE)) {
5163                         /*
5164                          * Next crash dump buffer is not yet DMA'd by FW
5165                          * Check after 10ms. Wait for 1 second for FW to
5166                          * post the next buffer. If not bail out.
5167                          */
5168                         wait++;
5169                         msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
5170                         status_reg = instance->instancet->read_fw_status_reg(
5171                                         instance);
5172                         continue;
5173                 }
5174
5175                 wait = 0;
5176                 if (instance->drv_buf_index >= instance->drv_buf_alloc) {
5177                         dev_info(&instance->pdev->dev,
5178                                  "Driver is done copying the buffer: %d\n",
5179                                  instance->drv_buf_alloc);
5180                         status_reg |= MFI_STATE_CRASH_DUMP_DONE;
5181                         partial_copy = 1;
5182                         break;
5183                 } else {
5184                         memcpy(instance->crash_buf[instance->drv_buf_index],
5185                                instance->crash_dump_buf, CRASH_DMA_BUF_SIZE);
5186                         instance->drv_buf_index++;
5187                         status_reg &= ~MFI_STATE_DMADONE;
5188                 }
5189
5190                 writel(status_reg, &instance->reg_set->outbound_scratch_pad_0);
5191                 readl(&instance->reg_set->outbound_scratch_pad_0);
5192
5193                 msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
5194                 status_reg = instance->instancet->read_fw_status_reg(instance);
5195         }
5196
5197         if (status_reg & MFI_STATE_CRASH_DUMP_DONE) {
5198                 dev_info(&instance->pdev->dev, "Crash Dump is available,number "
5199                         "of copied buffers: %d\n", instance->drv_buf_index);
5200                 instance->fw_crash_buffer_size =  instance->drv_buf_index;
5201                 instance->fw_crash_state = AVAILABLE;
5202                 instance->drv_buf_index = 0;
5203                 writel(status_reg, &instance->reg_set->outbound_scratch_pad_0);
5204                 readl(&instance->reg_set->outbound_scratch_pad_0);
5205                 if (!partial_copy)
5206                         megasas_reset_fusion(instance->host, 0);
5207         }
5208 }
5209
5210
5211 /* Fusion OCR work queue */
5212 void megasas_fusion_ocr_wq(struct work_struct *work)
5213 {
5214         struct megasas_instance *instance =
5215                 container_of(work, struct megasas_instance, work_init);
5216
5217         megasas_reset_fusion(instance->host, 0);
5218 }
5219
5220 /* Allocate fusion context */
5221 int
5222 megasas_alloc_fusion_context(struct megasas_instance *instance)
5223 {
5224         struct fusion_context *fusion;
5225
5226         instance->ctrl_context = kzalloc(sizeof(struct fusion_context),
5227                                          GFP_KERNEL);
5228         if (!instance->ctrl_context) {
5229                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
5230                         __func__, __LINE__);
5231                 return -ENOMEM;
5232         }
5233
5234         fusion = instance->ctrl_context;
5235
5236         fusion->log_to_span_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
5237                                               sizeof(LD_SPAN_INFO));
5238         fusion->log_to_span =
5239                 (PLD_SPAN_INFO)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
5240                                                 fusion->log_to_span_pages);
5241         if (!fusion->log_to_span) {
5242                 fusion->log_to_span =
5243                         vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT,
5244                                            sizeof(LD_SPAN_INFO)));
5245                 if (!fusion->log_to_span) {
5246                         dev_err(&instance->pdev->dev, "Failed from %s %d\n",
5247                                 __func__, __LINE__);
5248                         return -ENOMEM;
5249                 }
5250         }
5251
5252         fusion->load_balance_info_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
5253                 sizeof(struct LD_LOAD_BALANCE_INFO));
5254         fusion->load_balance_info =
5255                 (struct LD_LOAD_BALANCE_INFO *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
5256                 fusion->load_balance_info_pages);
5257         if (!fusion->load_balance_info) {
5258                 fusion->load_balance_info =
5259                         vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT,
5260                                            sizeof(struct LD_LOAD_BALANCE_INFO)));
5261                 if (!fusion->load_balance_info)
5262                         dev_err(&instance->pdev->dev, "Failed to allocate load_balance_info, "
5263                                 "continuing without Load Balance support\n");
5264         }
5265
5266         return 0;
5267 }
5268
5269 void
5270 megasas_free_fusion_context(struct megasas_instance *instance)
5271 {
5272         struct fusion_context *fusion = instance->ctrl_context;
5273
5274         if (fusion) {
5275                 if (fusion->load_balance_info) {
5276                         if (is_vmalloc_addr(fusion->load_balance_info))
5277                                 vfree(fusion->load_balance_info);
5278                         else
5279                                 free_pages((ulong)fusion->load_balance_info,
5280                                         fusion->load_balance_info_pages);
5281                 }
5282
5283                 if (fusion->log_to_span) {
5284                         if (is_vmalloc_addr(fusion->log_to_span))
5285                                 vfree(fusion->log_to_span);
5286                         else
5287                                 free_pages((ulong)fusion->log_to_span,
5288                                            fusion->log_to_span_pages);
5289                 }
5290
5291                 kfree(fusion);
5292         }
5293 }
5294
5295 struct megasas_instance_template megasas_instance_template_fusion = {
5296         .enable_intr = megasas_enable_intr_fusion,
5297         .disable_intr = megasas_disable_intr_fusion,
5298         .clear_intr = megasas_clear_intr_fusion,
5299         .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
5300         .adp_reset = megasas_adp_reset_fusion,
5301         .check_reset = megasas_check_reset_fusion,
5302         .service_isr = megasas_isr_fusion,
5303         .tasklet = megasas_complete_cmd_dpc_fusion,
5304         .init_adapter = megasas_init_adapter_fusion,
5305         .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
5306         .issue_dcmd = megasas_issue_dcmd_fusion,
5307 };