linux/drivers/scsi/megaraid/megaraid_sas_fusion.c
<<
>>
Prefs
   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
  51extern void
  52megasas_complete_cmd(struct megasas_instance *instance,
  53                     struct megasas_cmd *cmd, u8 alt_status);
  54int
  55wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
  56              int seconds);
  57
  58int
  59megasas_clear_intr_fusion(struct megasas_instance *instance);
  60
  61int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
  62
  63extern u32 megasas_dbg_lvl;
  64int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
  65                                  int initial);
  66extern struct megasas_mgmt_info megasas_mgmt_info;
  67extern unsigned int resetwaittime;
  68extern unsigned int dual_qdepth_disable;
  69static void megasas_free_rdpq_fusion(struct megasas_instance *instance);
  70static void megasas_free_reply_fusion(struct megasas_instance *instance);
  71static inline
  72void megasas_configure_queue_sizes(struct megasas_instance *instance);
  73static void megasas_fusion_crash_dump(struct megasas_instance *instance);
  74
  75/**
  76 * megasas_adp_reset_wait_for_ready -   initiate chip reset and wait for
  77 *                                      controller to come to ready state
  78 * @instance:                           adapter's soft state
  79 * @do_adp_reset:                       If true, do a chip reset
  80 * @ocr_context:                        If called from OCR context this will
  81 *                                      be set to 1, else 0
  82 *
  83 * This function initates a chip reset followed by a wait for controller to
  84 * transition to ready state.
  85 * During this, driver will block all access to PCI config space from userspace
  86 */
  87int
  88megasas_adp_reset_wait_for_ready(struct megasas_instance *instance,
  89                                 bool do_adp_reset,
  90                                 int ocr_context)
  91{
  92        int ret = FAILED;
  93
  94        /*
  95         * Block access to PCI config space from userspace
  96         * when diag reset is initiated from driver
  97         */
  98        if (megasas_dbg_lvl & OCR_DEBUG)
  99                dev_info(&instance->pdev->dev,
 100                         "Block access to PCI config space %s %d\n",
 101                         __func__, __LINE__);
 102
 103        pci_cfg_access_lock(instance->pdev);
 104
 105        if (do_adp_reset) {
 106                if (instance->instancet->adp_reset
 107                        (instance, instance->reg_set))
 108                        goto out;
 109        }
 110
 111        /* Wait for FW to become ready */
 112        if (megasas_transition_to_ready(instance, ocr_context)) {
 113                dev_warn(&instance->pdev->dev,
 114                         "Failed to transition controller to ready for scsi%d.\n",
 115                         instance->host->host_no);
 116                goto out;
 117        }
 118
 119        ret = SUCCESS;
 120out:
 121        if (megasas_dbg_lvl & OCR_DEBUG)
 122                dev_info(&instance->pdev->dev,
 123                         "Unlock access to PCI config space %s %d\n",
 124                         __func__, __LINE__);
 125
 126        pci_cfg_access_unlock(instance->pdev);
 127
 128        return ret;
 129}
 130
 131/**
 132 * megasas_check_same_4gb_region -      check if allocation
 133 *                                      crosses same 4GB boundary or not
 134 * @instance:                           adapter's soft instance
 135 * @start_addr:                         start address of DMA allocation
 136 * @size:                               size of allocation in bytes
 137 * @return:                             true : allocation does not cross same
 138 *                                      4GB boundary
 139 *                                      false: allocation crosses same
 140 *                                      4GB boundary
 141 */
 142static inline bool megasas_check_same_4gb_region
 143        (struct megasas_instance *instance, dma_addr_t start_addr, size_t size)
 144{
 145        dma_addr_t end_addr;
 146
 147        end_addr = start_addr + size;
 148
 149        if (upper_32_bits(start_addr) != upper_32_bits(end_addr)) {
 150                dev_err(&instance->pdev->dev,
 151                        "Failed to get same 4GB boundary: start_addr: 0x%llx end_addr: 0x%llx\n",
 152                        (unsigned long long)start_addr,
 153                        (unsigned long long)end_addr);
 154                return false;
 155        }
 156
 157        return true;
 158}
 159
 160/**
 161 * megasas_enable_intr_fusion - Enables interrupts
 162 * @instance:   adapter's soft instance
 163 */
 164static void
 165megasas_enable_intr_fusion(struct megasas_instance *instance)
 166{
 167        struct megasas_register_set __iomem *regs;
 168        regs = instance->reg_set;
 169
 170        instance->mask_interrupts = 0;
 171        /* For Thunderbolt/Invader also clear intr on enable */
 172        writel(~0, &regs->outbound_intr_status);
 173        readl(&regs->outbound_intr_status);
 174
 175        writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 176
 177        /* Dummy readl to force pci flush */
 178        dev_info(&instance->pdev->dev, "%s is called outbound_intr_mask:0x%08x\n",
 179                 __func__, readl(&regs->outbound_intr_mask));
 180}
 181
 182/**
 183 * megasas_disable_intr_fusion - Disables interrupt
 184 * @instance:   adapter's soft instance
 185 */
 186static void
 187megasas_disable_intr_fusion(struct megasas_instance *instance)
 188{
 189        u32 mask = 0xFFFFFFFF;
 190        struct megasas_register_set __iomem *regs;
 191        regs = instance->reg_set;
 192        instance->mask_interrupts = 1;
 193
 194        writel(mask, &regs->outbound_intr_mask);
 195        /* Dummy readl to force pci flush */
 196        dev_info(&instance->pdev->dev, "%s is called outbound_intr_mask:0x%08x\n",
 197                 __func__, readl(&regs->outbound_intr_mask));
 198}
 199
 200int
 201megasas_clear_intr_fusion(struct megasas_instance *instance)
 202{
 203        u32 status;
 204        struct megasas_register_set __iomem *regs;
 205        regs = instance->reg_set;
 206        /*
 207         * Check if it is our interrupt
 208         */
 209        status = megasas_readl(instance,
 210                               &regs->outbound_intr_status);
 211
 212        if (status & 1) {
 213                writel(status, &regs->outbound_intr_status);
 214                readl(&regs->outbound_intr_status);
 215                return 1;
 216        }
 217        if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
 218                return 0;
 219
 220        return 1;
 221}
 222
 223static inline void
 224megasas_sdev_busy_inc(struct megasas_instance *instance,
 225                      struct scsi_cmnd *scmd)
 226{
 227        if (instance->perf_mode == MR_BALANCED_PERF_MODE) {
 228                struct MR_PRIV_DEVICE *mr_device_priv_data =
 229                        scmd->device->hostdata;
 230                atomic_inc(&mr_device_priv_data->sdev_priv_busy);
 231        }
 232}
 233
 234static inline void
 235megasas_sdev_busy_dec(struct megasas_instance *instance,
 236                      struct scsi_cmnd *scmd)
 237{
 238        if (instance->perf_mode == MR_BALANCED_PERF_MODE) {
 239                struct MR_PRIV_DEVICE *mr_device_priv_data =
 240                        scmd->device->hostdata;
 241                atomic_dec(&mr_device_priv_data->sdev_priv_busy);
 242        }
 243}
 244
 245static inline int
 246megasas_sdev_busy_read(struct megasas_instance *instance,
 247                       struct scsi_cmnd *scmd)
 248{
 249        if (instance->perf_mode == MR_BALANCED_PERF_MODE) {
 250                struct MR_PRIV_DEVICE *mr_device_priv_data =
 251                        scmd->device->hostdata;
 252                return atomic_read(&mr_device_priv_data->sdev_priv_busy);
 253        }
 254        return 0;
 255}
 256
 257/**
 258 * megasas_get_cmd_fusion -     Get a command from the free pool
 259 * @instance:           Adapter soft state
 260 * @blk_tag:            Command tag
 261 *
 262 * Returns a blk_tag indexed mpt frame
 263 */
 264inline struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 265                                                  *instance, u32 blk_tag)
 266{
 267        struct fusion_context *fusion;
 268
 269        fusion = instance->ctrl_context;
 270        return fusion->cmd_list[blk_tag];
 271}
 272
 273/**
 274 * megasas_return_cmd_fusion -  Return a cmd to free command pool
 275 * @instance:           Adapter soft state
 276 * @cmd:                Command packet to be returned to free command pool
 277 */
 278inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
 279        struct megasas_cmd_fusion *cmd)
 280{
 281        cmd->scmd = NULL;
 282        memset(cmd->io_request, 0, MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE);
 283        cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
 284        cmd->cmd_completed = false;
 285}
 286
 287/**
 288 * megasas_write_64bit_req_desc -       PCI writes 64bit request descriptor
 289 * @instance:                           Adapter soft state
 290 * @req_desc:                           64bit Request descriptor
 291 */
 292static void
 293megasas_write_64bit_req_desc(struct megasas_instance *instance,
 294                union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc)
 295{
 296#if defined(writeq) && defined(CONFIG_64BIT)
 297        u64 req_data = (((u64)le32_to_cpu(req_desc->u.high) << 32) |
 298                le32_to_cpu(req_desc->u.low));
 299        writeq(req_data, &instance->reg_set->inbound_low_queue_port);
 300#else
 301        unsigned long flags;
 302        spin_lock_irqsave(&instance->hba_lock, flags);
 303        writel(le32_to_cpu(req_desc->u.low),
 304                &instance->reg_set->inbound_low_queue_port);
 305        writel(le32_to_cpu(req_desc->u.high),
 306                &instance->reg_set->inbound_high_queue_port);
 307        spin_unlock_irqrestore(&instance->hba_lock, flags);
 308#endif
 309}
 310
 311/**
 312 * megasas_fire_cmd_fusion -    Sends command to the FW
 313 * @instance:                   Adapter soft state
 314 * @req_desc:                   32bit or 64bit Request descriptor
 315 *
 316 * Perform PCI Write. AERO SERIES supports 32 bit Descriptor.
 317 * Prior to AERO_SERIES support 64 bit Descriptor.
 318 */
 319static void
 320megasas_fire_cmd_fusion(struct megasas_instance *instance,
 321                union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc)
 322{
 323        if (instance->atomic_desc_support)
 324                writel(le32_to_cpu(req_desc->u.low),
 325                        &instance->reg_set->inbound_single_queue_port);
 326        else
 327                megasas_write_64bit_req_desc(instance, req_desc);
 328}
 329
 330/**
 331 * megasas_fusion_update_can_queue -    Do all Adapter Queue depth related calculations here
 332 * @instance:           Adapter soft state
 333 * @fw_boot_context:    Whether this function called during probe or after OCR
 334 *
 335 * This function is only for fusion controllers.
 336 * Update host can queue, if firmware downgrade max supported firmware commands.
 337 * Firmware upgrade case will be skiped because underlying firmware has
 338 * more resource than exposed to the OS.
 339 *
 340 */
 341static void
 342megasas_fusion_update_can_queue(struct megasas_instance *instance, int fw_boot_context)
 343{
 344        u16 cur_max_fw_cmds = 0;
 345        u16 ldio_threshold = 0;
 346
 347        /* ventura FW does not fill outbound_scratch_pad_2 with queue depth */
 348        if (instance->adapter_type < VENTURA_SERIES)
 349                cur_max_fw_cmds =
 350                megasas_readl(instance,
 351                              &instance->reg_set->outbound_scratch_pad_2) & 0x00FFFF;
 352
 353        if (dual_qdepth_disable || !cur_max_fw_cmds)
 354                cur_max_fw_cmds = instance->instancet->read_fw_status_reg(instance) & 0x00FFFF;
 355        else
 356                ldio_threshold =
 357                        (instance->instancet->read_fw_status_reg(instance) & 0x00FFFF) - MEGASAS_FUSION_IOCTL_CMDS;
 358
 359        dev_info(&instance->pdev->dev,
 360                 "Current firmware supports maximum commands: %d\t LDIO threshold: %d\n",
 361                 cur_max_fw_cmds, ldio_threshold);
 362
 363        if (fw_boot_context == OCR_CONTEXT) {
 364                cur_max_fw_cmds = cur_max_fw_cmds - 1;
 365                if (cur_max_fw_cmds < instance->max_fw_cmds) {
 366                        instance->cur_can_queue =
 367                                cur_max_fw_cmds - (MEGASAS_FUSION_INTERNAL_CMDS +
 368                                                MEGASAS_FUSION_IOCTL_CMDS);
 369                        instance->host->can_queue = instance->cur_can_queue;
 370                        instance->ldio_threshold = ldio_threshold;
 371                }
 372        } else {
 373                instance->max_fw_cmds = cur_max_fw_cmds;
 374                instance->ldio_threshold = ldio_threshold;
 375
 376                if (reset_devices)
 377                        instance->max_fw_cmds = min(instance->max_fw_cmds,
 378                                                (u16)MEGASAS_KDUMP_QUEUE_DEPTH);
 379                /*
 380                * Reduce the max supported cmds by 1. This is to ensure that the
 381                * reply_q_sz (1 more than the max cmd that driver may send)
 382                * does not exceed max cmds that the FW can support
 383                */
 384                instance->max_fw_cmds = instance->max_fw_cmds-1;
 385        }
 386}
 387
 388static inline void
 389megasas_get_msix_index(struct megasas_instance *instance,
 390                       struct scsi_cmnd *scmd,
 391                       struct megasas_cmd_fusion *cmd,
 392                       u8 data_arms)
 393{
 394        if (instance->perf_mode == MR_BALANCED_PERF_MODE &&
 395            (megasas_sdev_busy_read(instance, scmd) >
 396             (data_arms * MR_DEVICE_HIGH_IOPS_DEPTH))) {
 397                cmd->request_desc->SCSIIO.MSIxIndex =
 398                        mega_mod64((atomic64_add_return(1, &instance->high_iops_outstanding) /
 399                                        MR_HIGH_IOPS_BATCH_COUNT), instance->low_latency_index_start);
 400        } else if (instance->msix_load_balance) {
 401                cmd->request_desc->SCSIIO.MSIxIndex =
 402                        (mega_mod64(atomic64_add_return(1, &instance->total_io_count),
 403                                instance->msix_vectors));
 404        } else if (instance->host->nr_hw_queues > 1) {
 405                u32 tag = blk_mq_unique_tag(scmd->request);
 406
 407                cmd->request_desc->SCSIIO.MSIxIndex = blk_mq_unique_tag_to_hwq(tag) +
 408                        instance->low_latency_index_start;
 409        } else {
 410                cmd->request_desc->SCSIIO.MSIxIndex =
 411                        instance->reply_map[raw_smp_processor_id()];
 412        }
 413}
 414
 415/**
 416 * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
 417 * @instance:           Adapter soft state
 418 */
 419void
 420megasas_free_cmds_fusion(struct megasas_instance *instance)
 421{
 422        int i;
 423        struct fusion_context *fusion = instance->ctrl_context;
 424        struct megasas_cmd_fusion *cmd;
 425
 426        if (fusion->sense)
 427                dma_pool_free(fusion->sense_dma_pool, fusion->sense,
 428                              fusion->sense_phys_addr);
 429
 430        /* SG */
 431        if (fusion->cmd_list) {
 432                for (i = 0; i < instance->max_mpt_cmds; i++) {
 433                        cmd = fusion->cmd_list[i];
 434                        if (cmd) {
 435                                if (cmd->sg_frame)
 436                                        dma_pool_free(fusion->sg_dma_pool,
 437                                                      cmd->sg_frame,
 438                                                      cmd->sg_frame_phys_addr);
 439                        }
 440                        kfree(cmd);
 441                }
 442                kfree(fusion->cmd_list);
 443        }
 444
 445        if (fusion->sg_dma_pool) {
 446                dma_pool_destroy(fusion->sg_dma_pool);
 447                fusion->sg_dma_pool = NULL;
 448        }
 449        if (fusion->sense_dma_pool) {
 450                dma_pool_destroy(fusion->sense_dma_pool);
 451                fusion->sense_dma_pool = NULL;
 452        }
 453
 454
 455        /* Reply Frame, Desc*/
 456        if (instance->is_rdpq)
 457                megasas_free_rdpq_fusion(instance);
 458        else
 459                megasas_free_reply_fusion(instance);
 460
 461        /* Request Frame, Desc*/
 462        if (fusion->req_frames_desc)
 463                dma_free_coherent(&instance->pdev->dev,
 464                        fusion->request_alloc_sz, fusion->req_frames_desc,
 465                        fusion->req_frames_desc_phys);
 466        if (fusion->io_request_frames)
 467                dma_pool_free(fusion->io_request_frames_pool,
 468                        fusion->io_request_frames,
 469                        fusion->io_request_frames_phys);
 470        if (fusion->io_request_frames_pool) {
 471                dma_pool_destroy(fusion->io_request_frames_pool);
 472                fusion->io_request_frames_pool = NULL;
 473        }
 474}
 475
 476/**
 477 * megasas_create_sg_sense_fusion -     Creates DMA pool for cmd frames
 478 * @instance:                   Adapter soft state
 479 *
 480 */
 481static int megasas_create_sg_sense_fusion(struct megasas_instance *instance)
 482{
 483        int i;
 484        u16 max_cmd;
 485        struct fusion_context *fusion;
 486        struct megasas_cmd_fusion *cmd;
 487        int sense_sz;
 488        u32 offset;
 489
 490        fusion = instance->ctrl_context;
 491        max_cmd = instance->max_fw_cmds;
 492        sense_sz = instance->max_mpt_cmds * SCSI_SENSE_BUFFERSIZE;
 493
 494        fusion->sg_dma_pool =
 495                        dma_pool_create("mr_sg", &instance->pdev->dev,
 496                                instance->max_chain_frame_sz,
 497                                MR_DEFAULT_NVME_PAGE_SIZE, 0);
 498        /* SCSI_SENSE_BUFFERSIZE  = 96 bytes */
 499        fusion->sense_dma_pool =
 500                        dma_pool_create("mr_sense", &instance->pdev->dev,
 501                                sense_sz, 64, 0);
 502
 503        if (!fusion->sense_dma_pool || !fusion->sg_dma_pool) {
 504                dev_err(&instance->pdev->dev,
 505                        "Failed from %s %d\n",  __func__, __LINE__);
 506                return -ENOMEM;
 507        }
 508
 509        fusion->sense = dma_pool_alloc(fusion->sense_dma_pool,
 510                                       GFP_KERNEL, &fusion->sense_phys_addr);
 511        if (!fusion->sense) {
 512                dev_err(&instance->pdev->dev,
 513                        "failed from %s %d\n",  __func__, __LINE__);
 514                return -ENOMEM;
 515        }
 516
 517        /* sense buffer, request frame and reply desc pool requires to be in
 518         * same 4 gb region. Below function will check this.
 519         * In case of failure, new pci pool will be created with updated
 520         * alignment.
 521         * Older allocation and pool will be destroyed.
 522         * Alignment will be used such a way that next allocation if success,
 523         * will always meet same 4gb region requirement.
 524         * Actual requirement is not alignment, but we need start and end of
 525         * DMA address must have same upper 32 bit address.
 526         */
 527
 528        if (!megasas_check_same_4gb_region(instance, fusion->sense_phys_addr,
 529                                           sense_sz)) {
 530                dma_pool_free(fusion->sense_dma_pool, fusion->sense,
 531                              fusion->sense_phys_addr);
 532                fusion->sense = NULL;
 533                dma_pool_destroy(fusion->sense_dma_pool);
 534
 535                fusion->sense_dma_pool =
 536                        dma_pool_create("mr_sense_align", &instance->pdev->dev,
 537                                        sense_sz, roundup_pow_of_two(sense_sz),
 538                                        0);
 539                if (!fusion->sense_dma_pool) {
 540                        dev_err(&instance->pdev->dev,
 541                                "Failed from %s %d\n",  __func__, __LINE__);
 542                        return -ENOMEM;
 543                }
 544                fusion->sense = dma_pool_alloc(fusion->sense_dma_pool,
 545                                               GFP_KERNEL,
 546                                               &fusion->sense_phys_addr);
 547                if (!fusion->sense) {
 548                        dev_err(&instance->pdev->dev,
 549                                "failed from %s %d\n",  __func__, __LINE__);
 550                        return -ENOMEM;
 551                }
 552        }
 553
 554        /*
 555         * Allocate and attach a frame to each of the commands in cmd_list
 556         */
 557        for (i = 0; i < max_cmd; i++) {
 558                cmd = fusion->cmd_list[i];
 559                cmd->sg_frame = dma_pool_alloc(fusion->sg_dma_pool,
 560                                        GFP_KERNEL, &cmd->sg_frame_phys_addr);
 561
 562                offset = SCSI_SENSE_BUFFERSIZE * i;
 563                cmd->sense = (u8 *)fusion->sense + offset;
 564                cmd->sense_phys_addr = fusion->sense_phys_addr + offset;
 565
 566                if (!cmd->sg_frame) {
 567                        dev_err(&instance->pdev->dev,
 568                                "Failed from %s %d\n",  __func__, __LINE__);
 569                        return -ENOMEM;
 570                }
 571        }
 572
 573        /* create sense buffer for the raid 1/10 fp */
 574        for (i = max_cmd; i < instance->max_mpt_cmds; i++) {
 575                cmd = fusion->cmd_list[i];
 576                offset = SCSI_SENSE_BUFFERSIZE * i;
 577                cmd->sense = (u8 *)fusion->sense + offset;
 578                cmd->sense_phys_addr = fusion->sense_phys_addr + offset;
 579
 580        }
 581
 582        return 0;
 583}
 584
 585static int
 586megasas_alloc_cmdlist_fusion(struct megasas_instance *instance)
 587{
 588        u32 max_mpt_cmd, i, j;
 589        struct fusion_context *fusion;
 590
 591        fusion = instance->ctrl_context;
 592
 593        max_mpt_cmd = instance->max_mpt_cmds;
 594
 595        /*
 596         * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
 597         * Allocate the dynamic array first and then allocate individual
 598         * commands.
 599         */
 600        fusion->cmd_list =
 601                kcalloc(max_mpt_cmd, sizeof(struct megasas_cmd_fusion *),
 602                        GFP_KERNEL);
 603        if (!fusion->cmd_list) {
 604                dev_err(&instance->pdev->dev,
 605                        "Failed from %s %d\n",  __func__, __LINE__);
 606                return -ENOMEM;
 607        }
 608
 609        for (i = 0; i < max_mpt_cmd; i++) {
 610                fusion->cmd_list[i] = kzalloc(sizeof(struct megasas_cmd_fusion),
 611                                              GFP_KERNEL);
 612                if (!fusion->cmd_list[i]) {
 613                        for (j = 0; j < i; j++)
 614                                kfree(fusion->cmd_list[j]);
 615                        kfree(fusion->cmd_list);
 616                        dev_err(&instance->pdev->dev,
 617                                "Failed from %s %d\n",  __func__, __LINE__);
 618                        return -ENOMEM;
 619                }
 620        }
 621
 622        return 0;
 623}
 624
 625static int
 626megasas_alloc_request_fusion(struct megasas_instance *instance)
 627{
 628        struct fusion_context *fusion;
 629
 630        fusion = instance->ctrl_context;
 631
 632retry_alloc:
 633        fusion->io_request_frames_pool =
 634                        dma_pool_create("mr_ioreq", &instance->pdev->dev,
 635                                fusion->io_frames_alloc_sz, 16, 0);
 636
 637        if (!fusion->io_request_frames_pool) {
 638                dev_err(&instance->pdev->dev,
 639                        "Failed from %s %d\n",  __func__, __LINE__);
 640                return -ENOMEM;
 641        }
 642
 643        fusion->io_request_frames =
 644                        dma_pool_alloc(fusion->io_request_frames_pool,
 645                                GFP_KERNEL | __GFP_NOWARN,
 646                                &fusion->io_request_frames_phys);
 647        if (!fusion->io_request_frames) {
 648                if (instance->max_fw_cmds >= (MEGASAS_REDUCE_QD_COUNT * 2)) {
 649                        instance->max_fw_cmds -= MEGASAS_REDUCE_QD_COUNT;
 650                        dma_pool_destroy(fusion->io_request_frames_pool);
 651                        megasas_configure_queue_sizes(instance);
 652                        goto retry_alloc;
 653                } else {
 654                        dev_err(&instance->pdev->dev,
 655                                "Failed from %s %d\n",  __func__, __LINE__);
 656                        return -ENOMEM;
 657                }
 658        }
 659
 660        if (!megasas_check_same_4gb_region(instance,
 661                                           fusion->io_request_frames_phys,
 662                                           fusion->io_frames_alloc_sz)) {
 663                dma_pool_free(fusion->io_request_frames_pool,
 664                              fusion->io_request_frames,
 665                              fusion->io_request_frames_phys);
 666                fusion->io_request_frames = NULL;
 667                dma_pool_destroy(fusion->io_request_frames_pool);
 668
 669                fusion->io_request_frames_pool =
 670                        dma_pool_create("mr_ioreq_align",
 671                                        &instance->pdev->dev,
 672                                        fusion->io_frames_alloc_sz,
 673                                        roundup_pow_of_two(fusion->io_frames_alloc_sz),
 674                                        0);
 675
 676                if (!fusion->io_request_frames_pool) {
 677                        dev_err(&instance->pdev->dev,
 678                                "Failed from %s %d\n",  __func__, __LINE__);
 679                        return -ENOMEM;
 680                }
 681
 682                fusion->io_request_frames =
 683                        dma_pool_alloc(fusion->io_request_frames_pool,
 684                                       GFP_KERNEL | __GFP_NOWARN,
 685                                       &fusion->io_request_frames_phys);
 686
 687                if (!fusion->io_request_frames) {
 688                        dev_err(&instance->pdev->dev,
 689                                "Failed from %s %d\n",  __func__, __LINE__);
 690                        return -ENOMEM;
 691                }
 692        }
 693
 694        fusion->req_frames_desc =
 695                dma_alloc_coherent(&instance->pdev->dev,
 696                                   fusion->request_alloc_sz,
 697                                   &fusion->req_frames_desc_phys, GFP_KERNEL);
 698        if (!fusion->req_frames_desc) {
 699                dev_err(&instance->pdev->dev,
 700                        "Failed from %s %d\n",  __func__, __LINE__);
 701                return -ENOMEM;
 702        }
 703
 704        return 0;
 705}
 706
 707static int
 708megasas_alloc_reply_fusion(struct megasas_instance *instance)
 709{
 710        int i, count;
 711        struct fusion_context *fusion;
 712        union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 713        fusion = instance->ctrl_context;
 714
 715        count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 716        count += instance->iopoll_q_count;
 717
 718        fusion->reply_frames_desc_pool =
 719                        dma_pool_create("mr_reply", &instance->pdev->dev,
 720                                fusion->reply_alloc_sz * count, 16, 0);
 721
 722        if (!fusion->reply_frames_desc_pool) {
 723                dev_err(&instance->pdev->dev,
 724                        "Failed from %s %d\n",  __func__, __LINE__);
 725                return -ENOMEM;
 726        }
 727
 728        fusion->reply_frames_desc[0] =
 729                dma_pool_alloc(fusion->reply_frames_desc_pool,
 730                        GFP_KERNEL, &fusion->reply_frames_desc_phys[0]);
 731        if (!fusion->reply_frames_desc[0]) {
 732                dev_err(&instance->pdev->dev,
 733                        "Failed from %s %d\n",  __func__, __LINE__);
 734                return -ENOMEM;
 735        }
 736
 737        if (!megasas_check_same_4gb_region(instance,
 738                                           fusion->reply_frames_desc_phys[0],
 739                                           (fusion->reply_alloc_sz * count))) {
 740                dma_pool_free(fusion->reply_frames_desc_pool,
 741                              fusion->reply_frames_desc[0],
 742                              fusion->reply_frames_desc_phys[0]);
 743                fusion->reply_frames_desc[0] = NULL;
 744                dma_pool_destroy(fusion->reply_frames_desc_pool);
 745
 746                fusion->reply_frames_desc_pool =
 747                        dma_pool_create("mr_reply_align",
 748                                        &instance->pdev->dev,
 749                                        fusion->reply_alloc_sz * count,
 750                                        roundup_pow_of_two(fusion->reply_alloc_sz * count),
 751                                        0);
 752
 753                if (!fusion->reply_frames_desc_pool) {
 754                        dev_err(&instance->pdev->dev,
 755                                "Failed from %s %d\n",  __func__, __LINE__);
 756                        return -ENOMEM;
 757                }
 758
 759                fusion->reply_frames_desc[0] =
 760                        dma_pool_alloc(fusion->reply_frames_desc_pool,
 761                                       GFP_KERNEL,
 762                                       &fusion->reply_frames_desc_phys[0]);
 763
 764                if (!fusion->reply_frames_desc[0]) {
 765                        dev_err(&instance->pdev->dev,
 766                                "Failed from %s %d\n",  __func__, __LINE__);
 767                        return -ENOMEM;
 768                }
 769        }
 770
 771        reply_desc = fusion->reply_frames_desc[0];
 772        for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
 773                reply_desc->Words = cpu_to_le64(ULLONG_MAX);
 774
 775        /* This is not a rdpq mode, but driver still populate
 776         * reply_frame_desc array to use same msix index in ISR path.
 777         */
 778        for (i = 0; i < (count - 1); i++)
 779                fusion->reply_frames_desc[i + 1] =
 780                        fusion->reply_frames_desc[i] +
 781                        (fusion->reply_alloc_sz)/sizeof(union MPI2_REPLY_DESCRIPTORS_UNION);
 782
 783        return 0;
 784}
 785
 786static int
 787megasas_alloc_rdpq_fusion(struct megasas_instance *instance)
 788{
 789        int i, j, k, msix_count;
 790        struct fusion_context *fusion;
 791        union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 792        union MPI2_REPLY_DESCRIPTORS_UNION *rdpq_chunk_virt[RDPQ_MAX_CHUNK_COUNT];
 793        dma_addr_t rdpq_chunk_phys[RDPQ_MAX_CHUNK_COUNT];
 794        u8 dma_alloc_count, abs_index;
 795        u32 chunk_size, array_size, offset;
 796
 797        fusion = instance->ctrl_context;
 798        chunk_size = fusion->reply_alloc_sz * RDPQ_MAX_INDEX_IN_ONE_CHUNK;
 799        array_size = sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) *
 800                     MAX_MSIX_QUEUES_FUSION;
 801
 802        fusion->rdpq_virt = dma_alloc_coherent(&instance->pdev->dev,
 803                                               array_size, &fusion->rdpq_phys,
 804                                               GFP_KERNEL);
 805        if (!fusion->rdpq_virt) {
 806                dev_err(&instance->pdev->dev,
 807                        "Failed from %s %d\n",  __func__, __LINE__);
 808                return -ENOMEM;
 809        }
 810
 811        msix_count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 812        msix_count += instance->iopoll_q_count;
 813
 814        fusion->reply_frames_desc_pool = dma_pool_create("mr_rdpq",
 815                                                         &instance->pdev->dev,
 816                                                         chunk_size, 16, 0);
 817        fusion->reply_frames_desc_pool_align =
 818                                dma_pool_create("mr_rdpq_align",
 819                                                &instance->pdev->dev,
 820                                                chunk_size,
 821                                                roundup_pow_of_two(chunk_size),
 822                                                0);
 823
 824        if (!fusion->reply_frames_desc_pool ||
 825            !fusion->reply_frames_desc_pool_align) {
 826                dev_err(&instance->pdev->dev,
 827                        "Failed from %s %d\n",  __func__, __LINE__);
 828                return -ENOMEM;
 829        }
 830
 831/*
 832 * For INVADER_SERIES each set of 8 reply queues(0-7, 8-15, ..) and
 833 * VENTURA_SERIES each set of 16 reply queues(0-15, 16-31, ..) should be
 834 * within 4GB boundary and also reply queues in a set must have same
 835 * upper 32-bits in their memory address. so here driver is allocating the
 836 * DMA'able memory for reply queues according. Driver uses limitation of
 837 * VENTURA_SERIES to manage INVADER_SERIES as well.
 838 */
 839        dma_alloc_count = DIV_ROUND_UP(msix_count, RDPQ_MAX_INDEX_IN_ONE_CHUNK);
 840
 841        for (i = 0; i < dma_alloc_count; i++) {
 842                rdpq_chunk_virt[i] =
 843                        dma_pool_alloc(fusion->reply_frames_desc_pool,
 844                                       GFP_KERNEL, &rdpq_chunk_phys[i]);
 845                if (!rdpq_chunk_virt[i]) {
 846                        dev_err(&instance->pdev->dev,
 847                                "Failed from %s %d\n",  __func__, __LINE__);
 848                        return -ENOMEM;
 849                }
 850                /* reply desc pool requires to be in same 4 gb region.
 851                 * Below function will check this.
 852                 * In case of failure, new pci pool will be created with updated
 853                 * alignment.
 854                 * For RDPQ buffers, driver always allocate two separate pci pool.
 855                 * Alignment will be used such a way that next allocation if
 856                 * success, will always meet same 4gb region requirement.
 857                 * rdpq_tracker keep track of each buffer's physical,
 858                 * virtual address and pci pool descriptor. It will help driver
 859                 * while freeing the resources.
 860                 *
 861                 */
 862                if (!megasas_check_same_4gb_region(instance, rdpq_chunk_phys[i],
 863                                                   chunk_size)) {
 864                        dma_pool_free(fusion->reply_frames_desc_pool,
 865                                      rdpq_chunk_virt[i],
 866                                      rdpq_chunk_phys[i]);
 867
 868                        rdpq_chunk_virt[i] =
 869                                dma_pool_alloc(fusion->reply_frames_desc_pool_align,
 870                                               GFP_KERNEL, &rdpq_chunk_phys[i]);
 871                        if (!rdpq_chunk_virt[i]) {
 872                                dev_err(&instance->pdev->dev,
 873                                        "Failed from %s %d\n",
 874                                        __func__, __LINE__);
 875                                return -ENOMEM;
 876                        }
 877                        fusion->rdpq_tracker[i].dma_pool_ptr =
 878                                        fusion->reply_frames_desc_pool_align;
 879                } else {
 880                        fusion->rdpq_tracker[i].dma_pool_ptr =
 881                                        fusion->reply_frames_desc_pool;
 882                }
 883
 884                fusion->rdpq_tracker[i].pool_entry_phys = rdpq_chunk_phys[i];
 885                fusion->rdpq_tracker[i].pool_entry_virt = rdpq_chunk_virt[i];
 886        }
 887
 888        for (k = 0; k < dma_alloc_count; k++) {
 889                for (i = 0; i < RDPQ_MAX_INDEX_IN_ONE_CHUNK; i++) {
 890                        abs_index = (k * RDPQ_MAX_INDEX_IN_ONE_CHUNK) + i;
 891
 892                        if (abs_index == msix_count)
 893                                break;
 894                        offset = fusion->reply_alloc_sz * i;
 895                        fusion->rdpq_virt[abs_index].RDPQBaseAddress =
 896                                        cpu_to_le64(rdpq_chunk_phys[k] + offset);
 897                        fusion->reply_frames_desc_phys[abs_index] =
 898                                        rdpq_chunk_phys[k] + offset;
 899                        fusion->reply_frames_desc[abs_index] =
 900                                        (union MPI2_REPLY_DESCRIPTORS_UNION *)((u8 *)rdpq_chunk_virt[k] + offset);
 901
 902                        reply_desc = fusion->reply_frames_desc[abs_index];
 903                        for (j = 0; j < fusion->reply_q_depth; j++, reply_desc++)
 904                                reply_desc->Words = ULLONG_MAX;
 905                }
 906        }
 907
 908        return 0;
 909}
 910
 911static void
 912megasas_free_rdpq_fusion(struct megasas_instance *instance) {
 913
 914        int i;
 915        struct fusion_context *fusion;
 916
 917        fusion = instance->ctrl_context;
 918
 919        for (i = 0; i < RDPQ_MAX_CHUNK_COUNT; i++) {
 920                if (fusion->rdpq_tracker[i].pool_entry_virt)
 921                        dma_pool_free(fusion->rdpq_tracker[i].dma_pool_ptr,
 922                                      fusion->rdpq_tracker[i].pool_entry_virt,
 923                                      fusion->rdpq_tracker[i].pool_entry_phys);
 924
 925        }
 926
 927        dma_pool_destroy(fusion->reply_frames_desc_pool);
 928        dma_pool_destroy(fusion->reply_frames_desc_pool_align);
 929
 930        if (fusion->rdpq_virt)
 931                dma_free_coherent(&instance->pdev->dev,
 932                        sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) * MAX_MSIX_QUEUES_FUSION,
 933                        fusion->rdpq_virt, fusion->rdpq_phys);
 934}
 935
 936static void
 937megasas_free_reply_fusion(struct megasas_instance *instance) {
 938
 939        struct fusion_context *fusion;
 940
 941        fusion = instance->ctrl_context;
 942
 943        if (fusion->reply_frames_desc[0])
 944                dma_pool_free(fusion->reply_frames_desc_pool,
 945                        fusion->reply_frames_desc[0],
 946                        fusion->reply_frames_desc_phys[0]);
 947
 948        dma_pool_destroy(fusion->reply_frames_desc_pool);
 949
 950}
 951
 952
 953/**
 954 * megasas_alloc_cmds_fusion -  Allocates the command packets
 955 * @instance:           Adapter soft state
 956 *
 957 *
 958 * Each frame has a 32-bit field called context. This context is used to get
 959 * back the megasas_cmd_fusion from the frame when a frame gets completed
 960 * In this driver, the 32 bit values are the indices into an array cmd_list.
 961 * This array is used only to look up the megasas_cmd_fusion given the context.
 962 * The free commands themselves are maintained in a linked list called cmd_pool.
 963 *
 964 * cmds are formed in the io_request and sg_frame members of the
 965 * megasas_cmd_fusion. The context field is used to get a request descriptor
 966 * and is used as SMID of the cmd.
 967 * SMID value range is from 1 to max_fw_cmds.
 968 */
 969static int
 970megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 971{
 972        int i;
 973        struct fusion_context *fusion;
 974        struct megasas_cmd_fusion *cmd;
 975        u32 offset;
 976        dma_addr_t io_req_base_phys;
 977        u8 *io_req_base;
 978
 979
 980        fusion = instance->ctrl_context;
 981
 982        if (megasas_alloc_request_fusion(instance))
 983                goto fail_exit;
 984
 985        if (instance->is_rdpq) {
 986                if (megasas_alloc_rdpq_fusion(instance))
 987                        goto fail_exit;
 988        } else
 989                if (megasas_alloc_reply_fusion(instance))
 990                        goto fail_exit;
 991
 992        if (megasas_alloc_cmdlist_fusion(instance))
 993                goto fail_exit;
 994
 995        /* The first 256 bytes (SMID 0) is not used. Don't add to the cmd list */
 996        io_req_base = fusion->io_request_frames + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 997        io_req_base_phys = fusion->io_request_frames_phys + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 998
 999        /*
1000         * Add all the commands to command pool (fusion->cmd_pool)
1001         */
1002
1003        /* SMID 0 is reserved. Set SMID/index from 1 */
1004        for (i = 0; i < instance->max_mpt_cmds; i++) {
1005                cmd = fusion->cmd_list[i];
1006                offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
1007                memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
1008                cmd->index = i + 1;
1009                cmd->scmd = NULL;
1010                cmd->sync_cmd_idx =
1011                (i >= instance->max_scsi_cmds && i < instance->max_fw_cmds) ?
1012                                (i - instance->max_scsi_cmds) :
1013                                (u32)ULONG_MAX; /* Set to Invalid */
1014                cmd->instance = instance;
1015                cmd->io_request =
1016                        (struct MPI2_RAID_SCSI_IO_REQUEST *)
1017                  (io_req_base + offset);
1018                memset(cmd->io_request, 0,
1019                       sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
1020                cmd->io_request_phys_addr = io_req_base_phys + offset;
1021                cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
1022        }
1023
1024        if (megasas_create_sg_sense_fusion(instance))
1025                goto fail_exit;
1026
1027        return 0;
1028
1029fail_exit:
1030        megasas_free_cmds_fusion(instance);
1031        return -ENOMEM;
1032}
1033
1034/**
1035 * wait_and_poll -      Issues a polling command
1036 * @instance:                   Adapter soft state
1037 * @cmd:                        Command packet to be issued
1038 * @seconds:                    Maximum poll time
1039 *
1040 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
1041 */
1042int
1043wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
1044        int seconds)
1045{
1046        int i;
1047        struct megasas_header *frame_hdr = &cmd->frame->hdr;
1048        u32 status_reg;
1049
1050        u32 msecs = seconds * 1000;
1051
1052        /*
1053         * Wait for cmd_status to change
1054         */
1055        for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
1056                rmb();
1057                msleep(20);
1058                if (!(i % 5000)) {
1059                        status_reg = instance->instancet->read_fw_status_reg(instance)
1060                                        & MFI_STATE_MASK;
1061                        if (status_reg == MFI_STATE_FAULT)
1062                                break;
1063                }
1064        }
1065
1066        if (frame_hdr->cmd_status == MFI_STAT_INVALID_STATUS)
1067                return DCMD_TIMEOUT;
1068        else if (frame_hdr->cmd_status == MFI_STAT_OK)
1069                return DCMD_SUCCESS;
1070        else
1071                return DCMD_FAILED;
1072}
1073
1074/**
1075 * megasas_ioc_init_fusion -    Initializes the FW
1076 * @instance:           Adapter soft state
1077 *
1078 * Issues the IOC Init cmd
1079 */
1080int
1081megasas_ioc_init_fusion(struct megasas_instance *instance)
1082{
1083        struct megasas_init_frame *init_frame;
1084        struct MPI2_IOC_INIT_REQUEST *IOCInitMessage = NULL;
1085        dma_addr_t      ioc_init_handle;
1086        struct megasas_cmd *cmd;
1087        u8 ret, cur_rdpq_mode;
1088        struct fusion_context *fusion;
1089        union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
1090        int i;
1091        struct megasas_header *frame_hdr;
1092        const char *sys_info;
1093        MFI_CAPABILITIES *drv_ops;
1094        u32 scratch_pad_1;
1095        ktime_t time;
1096        bool cur_fw_64bit_dma_capable;
1097        bool cur_intr_coalescing;
1098
1099        fusion = instance->ctrl_context;
1100
1101        ioc_init_handle = fusion->ioc_init_request_phys;
1102        IOCInitMessage = fusion->ioc_init_request;
1103
1104        cmd = fusion->ioc_init_cmd;
1105
1106        scratch_pad_1 = megasas_readl
1107                (instance, &instance->reg_set->outbound_scratch_pad_1);
1108
1109        cur_rdpq_mode = (scratch_pad_1 & MR_RDPQ_MODE_OFFSET) ? 1 : 0;
1110
1111        if (instance->adapter_type == INVADER_SERIES) {
1112                cur_fw_64bit_dma_capable =
1113                        (scratch_pad_1 & MR_CAN_HANDLE_64_BIT_DMA_OFFSET) ? true : false;
1114
1115                if (instance->consistent_mask_64bit && !cur_fw_64bit_dma_capable) {
1116                        dev_err(&instance->pdev->dev, "Driver was operating on 64bit "
1117                                "DMA mask, but upcoming FW does not support 64bit DMA mask\n");
1118                        megaraid_sas_kill_hba(instance);
1119                        ret = 1;
1120                        goto fail_fw_init;
1121                }
1122        }
1123
1124        if (instance->is_rdpq && !cur_rdpq_mode) {
1125                dev_err(&instance->pdev->dev, "Firmware downgrade *NOT SUPPORTED*"
1126                        " from RDPQ mode to non RDPQ mode\n");
1127                ret = 1;
1128                goto fail_fw_init;
1129        }
1130
1131        cur_intr_coalescing = (scratch_pad_1 & MR_INTR_COALESCING_SUPPORT_OFFSET) ?
1132                                                        true : false;
1133
1134        if ((instance->low_latency_index_start ==
1135                MR_HIGH_IOPS_QUEUE_COUNT) && cur_intr_coalescing)
1136                instance->perf_mode = MR_BALANCED_PERF_MODE;
1137
1138        dev_info(&instance->pdev->dev, "Performance mode :%s (latency index = %d)\n",
1139                MEGASAS_PERF_MODE_2STR(instance->perf_mode),
1140                instance->low_latency_index_start);
1141
1142        instance->fw_sync_cache_support = (scratch_pad_1 &
1143                MR_CAN_HANDLE_SYNC_CACHE_OFFSET) ? 1 : 0;
1144        dev_info(&instance->pdev->dev, "FW supports sync cache\t: %s\n",
1145                 instance->fw_sync_cache_support ? "Yes" : "No");
1146
1147        memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
1148
1149        IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
1150        IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
1151        IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION);
1152        IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
1153        IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4);
1154
1155        IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth);
1156        IOCInitMessage->ReplyDescriptorPostQueueAddress = instance->is_rdpq ?
1157                        cpu_to_le64(fusion->rdpq_phys) :
1158                        cpu_to_le64(fusion->reply_frames_desc_phys[0]);
1159        IOCInitMessage->MsgFlags = instance->is_rdpq ?
1160                        MPI2_IOCINIT_MSGFLAG_RDPQ_ARRAY_MODE : 0;
1161        IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys);
1162        IOCInitMessage->SenseBufferAddressHigh = cpu_to_le32(upper_32_bits(fusion->sense_phys_addr));
1163        IOCInitMessage->HostMSIxVectors = instance->msix_vectors + instance->iopoll_q_count;
1164        IOCInitMessage->HostPageSize = MR_DEFAULT_NVME_PAGE_SHIFT;
1165
1166        time = ktime_get_real();
1167        /* Convert to milliseconds as per FW requirement */
1168        IOCInitMessage->TimeStamp = cpu_to_le64(ktime_to_ms(time));
1169
1170        init_frame = (struct megasas_init_frame *)cmd->frame;
1171        memset(init_frame, 0, IOC_INIT_FRAME_SIZE);
1172
1173        frame_hdr = &cmd->frame->hdr;
1174        frame_hdr->cmd_status = 0xFF;
1175        frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
1176
1177        init_frame->cmd = MFI_CMD_INIT;
1178        init_frame->cmd_status = 0xFF;
1179
1180        drv_ops = (MFI_CAPABILITIES *) &(init_frame->driver_operations);
1181
1182        /* driver support Extended MSIX */
1183        if (instance->adapter_type >= INVADER_SERIES)
1184                drv_ops->mfi_capabilities.support_additional_msix = 1;
1185        /* driver supports HA / Remote LUN over Fast Path interface */
1186        drv_ops->mfi_capabilities.support_fp_remote_lun = 1;
1187
1188        drv_ops->mfi_capabilities.support_max_255lds = 1;
1189        drv_ops->mfi_capabilities.support_ndrive_r1_lb = 1;
1190        drv_ops->mfi_capabilities.security_protocol_cmds_fw = 1;
1191
1192        if (instance->max_chain_frame_sz > MEGASAS_CHAIN_FRAME_SZ_MIN)
1193                drv_ops->mfi_capabilities.support_ext_io_size = 1;
1194
1195        drv_ops->mfi_capabilities.support_fp_rlbypass = 1;
1196        if (!dual_qdepth_disable)
1197                drv_ops->mfi_capabilities.support_ext_queue_depth = 1;
1198
1199        drv_ops->mfi_capabilities.support_qd_throttling = 1;
1200        drv_ops->mfi_capabilities.support_pd_map_target_id = 1;
1201        drv_ops->mfi_capabilities.support_nvme_passthru = 1;
1202        drv_ops->mfi_capabilities.support_fw_exposed_dev_list = 1;
1203
1204        if (instance->consistent_mask_64bit)
1205                drv_ops->mfi_capabilities.support_64bit_mode = 1;
1206
1207        /* Convert capability to LE32 */
1208        cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
1209
1210        sys_info = dmi_get_system_info(DMI_PRODUCT_UUID);
1211        if (instance->system_info_buf && sys_info) {
1212                memcpy(instance->system_info_buf->systemId, sys_info,
1213                        strlen(sys_info) > 64 ? 64 : strlen(sys_info));
1214                instance->system_info_buf->systemIdLength =
1215                        strlen(sys_info) > 64 ? 64 : strlen(sys_info);
1216                init_frame->system_info_lo = cpu_to_le32(lower_32_bits(instance->system_info_h));
1217                init_frame->system_info_hi = cpu_to_le32(upper_32_bits(instance->system_info_h));
1218        }
1219
1220        init_frame->queue_info_new_phys_addr_hi =
1221                cpu_to_le32(upper_32_bits(ioc_init_handle));
1222        init_frame->queue_info_new_phys_addr_lo =
1223                cpu_to_le32(lower_32_bits(ioc_init_handle));
1224        init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
1225
1226        /*
1227         * Each bit in replyqueue_mask represents one group of MSI-x vectors
1228         * (each group has 8 vectors)
1229         */
1230        switch (instance->perf_mode) {
1231        case MR_BALANCED_PERF_MODE:
1232                init_frame->replyqueue_mask =
1233                       cpu_to_le16(~(~0 << instance->low_latency_index_start/8));
1234                break;
1235        case MR_IOPS_PERF_MODE:
1236                init_frame->replyqueue_mask =
1237                       cpu_to_le16(~(~0 << instance->msix_vectors/8));
1238                break;
1239        }
1240
1241
1242        req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr));
1243        req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr));
1244        req_desc.MFAIo.RequestFlags =
1245                (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
1246                MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1247
1248        /*
1249         * disable the intr before firing the init frame
1250         */
1251        instance->instancet->disable_intr(instance);
1252
1253        for (i = 0; i < (10 * 1000); i += 20) {
1254                if (megasas_readl(instance, &instance->reg_set->doorbell) & 1)
1255                        msleep(20);
1256                else
1257                        break;
1258        }
1259
1260        /* For AERO also, IOC_INIT requires 64 bit descriptor write */
1261        megasas_write_64bit_req_desc(instance, &req_desc);
1262
1263        wait_and_poll(instance, cmd, MFI_IO_TIMEOUT_SECS);
1264
1265        frame_hdr = &cmd->frame->hdr;
1266        if (frame_hdr->cmd_status != 0) {
1267                ret = 1;
1268                goto fail_fw_init;
1269        }
1270
1271        if (instance->adapter_type >= AERO_SERIES) {
1272                scratch_pad_1 = megasas_readl
1273                        (instance, &instance->reg_set->outbound_scratch_pad_1);
1274
1275                instance->atomic_desc_support =
1276                        (scratch_pad_1 & MR_ATOMIC_DESCRIPTOR_SUPPORT_OFFSET) ? 1 : 0;
1277
1278                dev_info(&instance->pdev->dev, "FW supports atomic descriptor\t: %s\n",
1279                        instance->atomic_desc_support ? "Yes" : "No");
1280        }
1281
1282        return 0;
1283
1284fail_fw_init:
1285        dev_err(&instance->pdev->dev,
1286                "Init cmd return status FAILED for SCSI host %d\n",
1287                instance->host->host_no);
1288
1289        return ret;
1290}
1291
1292/**
1293 * megasas_sync_pd_seq_num -    JBOD SEQ MAP
1294 * @instance:           Adapter soft state
1295 * @pend:               set to 1, if it is pended jbod map.
1296 *
1297 * Issue Jbod map to the firmware. If it is pended command,
1298 * issue command and return. If it is first instance of jbod map
1299 * issue and receive command.
1300 */
1301int
1302megasas_sync_pd_seq_num(struct megasas_instance *instance, bool pend) {
1303        int ret = 0;
1304        size_t pd_seq_map_sz;
1305        struct megasas_cmd *cmd;
1306        struct megasas_dcmd_frame *dcmd;
1307        struct fusion_context *fusion = instance->ctrl_context;
1308        struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
1309        dma_addr_t pd_seq_h;
1310
1311        pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id & 1)];
1312        pd_seq_h = fusion->pd_seq_phys[(instance->pd_seq_map_id & 1)];
1313        pd_seq_map_sz = struct_size(pd_sync, seq, MAX_PHYSICAL_DEVICES - 1);
1314
1315        cmd = megasas_get_cmd(instance);
1316        if (!cmd) {
1317                dev_err(&instance->pdev->dev,
1318                        "Could not get mfi cmd. Fail from %s %d\n",
1319                        __func__, __LINE__);
1320                return -ENOMEM;
1321        }
1322
1323        dcmd = &cmd->frame->dcmd;
1324
1325        memset(pd_sync, 0, pd_seq_map_sz);
1326        memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1327
1328        if (pend) {
1329                dcmd->mbox.b[0] = MEGASAS_DCMD_MBOX_PEND_FLAG;
1330                dcmd->flags = MFI_FRAME_DIR_WRITE;
1331                instance->jbod_seq_cmd = cmd;
1332        } else {
1333                dcmd->flags = MFI_FRAME_DIR_READ;
1334        }
1335
1336        dcmd->cmd = MFI_CMD_DCMD;
1337        dcmd->cmd_status = 0xFF;
1338        dcmd->sge_count = 1;
1339        dcmd->timeout = 0;
1340        dcmd->pad_0 = 0;
1341        dcmd->data_xfer_len = cpu_to_le32(pd_seq_map_sz);
1342        dcmd->opcode = cpu_to_le32(MR_DCMD_SYSTEM_PD_MAP_GET_INFO);
1343
1344        megasas_set_dma_settings(instance, dcmd, pd_seq_h, pd_seq_map_sz);
1345
1346        if (pend) {
1347                instance->instancet->issue_dcmd(instance, cmd);
1348                return 0;
1349        }
1350
1351        /* Below code is only for non pended DCMD */
1352        if (!instance->mask_interrupts)
1353                ret = megasas_issue_blocked_cmd(instance, cmd,
1354                        MFI_IO_TIMEOUT_SECS);
1355        else
1356                ret = megasas_issue_polled(instance, cmd);
1357
1358        if (le32_to_cpu(pd_sync->count) > MAX_PHYSICAL_DEVICES) {
1359                dev_warn(&instance->pdev->dev,
1360                        "driver supports max %d JBOD, but FW reports %d\n",
1361                        MAX_PHYSICAL_DEVICES, le32_to_cpu(pd_sync->count));
1362                ret = -EINVAL;
1363        }
1364
1365        if (ret == DCMD_TIMEOUT)
1366                dev_warn(&instance->pdev->dev,
1367                         "%s DCMD timed out, continue without JBOD sequence map\n",
1368                         __func__);
1369
1370        if (ret == DCMD_SUCCESS)
1371                instance->pd_seq_map_id++;
1372
1373        megasas_return_cmd(instance, cmd);
1374        return ret;
1375}
1376
1377/*
1378 * megasas_get_ld_map_info -    Returns FW's ld_map structure
1379 * @instance:                           Adapter soft state
1380 * @pend:                               Pend the command or not
1381 * Issues an internal command (DCMD) to get the FW's controller PD
1382 * list structure.  This information is mainly used to find out SYSTEM
1383 * supported by the FW.
1384 * dcmd.mbox value setting for MR_DCMD_LD_MAP_GET_INFO
1385 * dcmd.mbox.b[0]       - number of LDs being sync'd
1386 * dcmd.mbox.b[1]       - 0 - complete command immediately.
1387 *                      - 1 - pend till config change
1388 * dcmd.mbox.b[2]       - 0 - supports max 64 lds and uses legacy MR_FW_RAID_MAP
1389 *                      - 1 - supports max MAX_LOGICAL_DRIVES_EXT lds and
1390 *                              uses extended struct MR_FW_RAID_MAP_EXT
1391 */
1392static int
1393megasas_get_ld_map_info(struct megasas_instance *instance)
1394{
1395        int ret = 0;
1396        struct megasas_cmd *cmd;
1397        struct megasas_dcmd_frame *dcmd;
1398        void *ci;
1399        dma_addr_t ci_h = 0;
1400        u32 size_map_info;
1401        struct fusion_context *fusion;
1402
1403        cmd = megasas_get_cmd(instance);
1404
1405        if (!cmd) {
1406                dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for map info\n");
1407                return -ENOMEM;
1408        }
1409
1410        fusion = instance->ctrl_context;
1411
1412        if (!fusion) {
1413                megasas_return_cmd(instance, cmd);
1414                return -ENXIO;
1415        }
1416
1417        dcmd = &cmd->frame->dcmd;
1418
1419        size_map_info = fusion->current_map_sz;
1420
1421        ci = (void *) fusion->ld_map[(instance->map_id & 1)];
1422        ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
1423
1424        if (!ci) {
1425                dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to alloc mem for ld_map_info\n");
1426                megasas_return_cmd(instance, cmd);
1427                return -ENOMEM;
1428        }
1429
1430        memset(ci, 0, fusion->max_map_sz);
1431        memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1432        dcmd->cmd = MFI_CMD_DCMD;
1433        dcmd->cmd_status = 0xFF;
1434        dcmd->sge_count = 1;
1435        dcmd->flags = MFI_FRAME_DIR_READ;
1436        dcmd->timeout = 0;
1437        dcmd->pad_0 = 0;
1438        dcmd->data_xfer_len = cpu_to_le32(size_map_info);
1439        dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
1440
1441        megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
1442
1443        if (!instance->mask_interrupts)
1444                ret = megasas_issue_blocked_cmd(instance, cmd,
1445                        MFI_IO_TIMEOUT_SECS);
1446        else
1447                ret = megasas_issue_polled(instance, cmd);
1448
1449        if (ret == DCMD_TIMEOUT)
1450                dev_warn(&instance->pdev->dev,
1451                         "%s DCMD timed out, RAID map is disabled\n",
1452                         __func__);
1453
1454        megasas_return_cmd(instance, cmd);
1455
1456        return ret;
1457}
1458
1459u8
1460megasas_get_map_info(struct megasas_instance *instance)
1461{
1462        struct fusion_context *fusion = instance->ctrl_context;
1463
1464        fusion->fast_path_io = 0;
1465        if (!megasas_get_ld_map_info(instance)) {
1466                if (MR_ValidateMapInfo(instance, instance->map_id)) {
1467                        fusion->fast_path_io = 1;
1468                        return 0;
1469                }
1470        }
1471        return 1;
1472}
1473
1474/*
1475 * megasas_sync_map_info -      Returns FW's ld_map structure
1476 * @instance:                           Adapter soft state
1477 *
1478 * Issues an internal command (DCMD) to get the FW's controller PD
1479 * list structure.  This information is mainly used to find out SYSTEM
1480 * supported by the FW.
1481 */
1482int
1483megasas_sync_map_info(struct megasas_instance *instance)
1484{
1485        int i;
1486        struct megasas_cmd *cmd;
1487        struct megasas_dcmd_frame *dcmd;
1488        u16 num_lds;
1489        struct fusion_context *fusion;
1490        struct MR_LD_TARGET_SYNC *ci = NULL;
1491        struct MR_DRV_RAID_MAP_ALL *map;
1492        struct MR_LD_RAID  *raid;
1493        struct MR_LD_TARGET_SYNC *ld_sync;
1494        dma_addr_t ci_h = 0;
1495        u32 size_map_info;
1496
1497        cmd = megasas_get_cmd(instance);
1498
1499        if (!cmd) {
1500                dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for sync info\n");
1501                return -ENOMEM;
1502        }
1503
1504        fusion = instance->ctrl_context;
1505
1506        if (!fusion) {
1507                megasas_return_cmd(instance, cmd);
1508                return 1;
1509        }
1510
1511        map = fusion->ld_drv_map[instance->map_id & 1];
1512
1513        num_lds = le16_to_cpu(map->raidMap.ldCount);
1514
1515        dcmd = &cmd->frame->dcmd;
1516
1517        memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1518
1519        ci = (struct MR_LD_TARGET_SYNC *)
1520          fusion->ld_map[(instance->map_id - 1) & 1];
1521        memset(ci, 0, fusion->max_map_sz);
1522
1523        ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
1524
1525        ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
1526
1527        for (i = 0; i < num_lds; i++, ld_sync++) {
1528                raid = MR_LdRaidGet(i, map);
1529                ld_sync->targetId = MR_GetLDTgtId(i, map);
1530                ld_sync->seqNum = raid->seqNum;
1531        }
1532
1533        size_map_info = fusion->current_map_sz;
1534
1535        dcmd->cmd = MFI_CMD_DCMD;
1536        dcmd->cmd_status = 0xFF;
1537        dcmd->sge_count = 1;
1538        dcmd->flags = MFI_FRAME_DIR_WRITE;
1539        dcmd->timeout = 0;
1540        dcmd->pad_0 = 0;
1541        dcmd->data_xfer_len = cpu_to_le32(size_map_info);
1542        dcmd->mbox.b[0] = num_lds;
1543        dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
1544        dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
1545
1546        megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
1547
1548        instance->map_update_cmd = cmd;
1549
1550        instance->instancet->issue_dcmd(instance, cmd);
1551
1552        return 0;
1553}
1554
1555/*
1556 * meagasas_display_intel_branding - Display branding string
1557 * @instance: per adapter object
1558 *
1559 * Return nothing.
1560 */
1561static void
1562megasas_display_intel_branding(struct megasas_instance *instance)
1563{
1564        if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL)
1565                return;
1566
1567        switch (instance->pdev->device) {
1568        case PCI_DEVICE_ID_LSI_INVADER:
1569                switch (instance->pdev->subsystem_device) {
1570                case MEGARAID_INTEL_RS3DC080_SSDID:
1571                        dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1572                                instance->host->host_no,
1573                                MEGARAID_INTEL_RS3DC080_BRANDING);
1574                        break;
1575                case MEGARAID_INTEL_RS3DC040_SSDID:
1576                        dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1577                                instance->host->host_no,
1578                                MEGARAID_INTEL_RS3DC040_BRANDING);
1579                        break;
1580                case MEGARAID_INTEL_RS3SC008_SSDID:
1581                        dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1582                                instance->host->host_no,
1583                                MEGARAID_INTEL_RS3SC008_BRANDING);
1584                        break;
1585                case MEGARAID_INTEL_RS3MC044_SSDID:
1586                        dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1587                                instance->host->host_no,
1588                                MEGARAID_INTEL_RS3MC044_BRANDING);
1589                        break;
1590                default:
1591                        break;
1592                }
1593                break;
1594        case PCI_DEVICE_ID_LSI_FURY:
1595                switch (instance->pdev->subsystem_device) {
1596                case MEGARAID_INTEL_RS3WC080_SSDID:
1597                        dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1598                                instance->host->host_no,
1599                                MEGARAID_INTEL_RS3WC080_BRANDING);
1600                        break;
1601                case MEGARAID_INTEL_RS3WC040_SSDID:
1602                        dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1603                                instance->host->host_no,
1604                                MEGARAID_INTEL_RS3WC040_BRANDING);
1605                        break;
1606                default:
1607                        break;
1608                }
1609                break;
1610        case PCI_DEVICE_ID_LSI_CUTLASS_52:
1611        case PCI_DEVICE_ID_LSI_CUTLASS_53:
1612                switch (instance->pdev->subsystem_device) {
1613                case MEGARAID_INTEL_RMS3BC160_SSDID:
1614                        dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1615                                instance->host->host_no,
1616                                MEGARAID_INTEL_RMS3BC160_BRANDING);
1617                        break;
1618                default:
1619                        break;
1620                }
1621                break;
1622        default:
1623                break;
1624        }
1625}
1626
1627/**
1628 * megasas_allocate_raid_maps - Allocate memory for RAID maps
1629 * @instance:                           Adapter soft state
1630 *
1631 * return:                              if success: return 0
1632 *                                      failed:  return -ENOMEM
1633 */
1634static inline int megasas_allocate_raid_maps(struct megasas_instance *instance)
1635{
1636        struct fusion_context *fusion;
1637        int i = 0;
1638
1639        fusion = instance->ctrl_context;
1640
1641        fusion->drv_map_pages = get_order(fusion->drv_map_sz);
1642
1643        for (i = 0; i < 2; i++) {
1644                fusion->ld_map[i] = NULL;
1645
1646                fusion->ld_drv_map[i] = (void *)
1647                        __get_free_pages(__GFP_ZERO | GFP_KERNEL,
1648                                         fusion->drv_map_pages);
1649
1650                if (!fusion->ld_drv_map[i]) {
1651                        fusion->ld_drv_map[i] = vzalloc(fusion->drv_map_sz);
1652
1653                        if (!fusion->ld_drv_map[i]) {
1654                                dev_err(&instance->pdev->dev,
1655                                        "Could not allocate memory for local map"
1656                                        " size requested: %d\n",
1657                                        fusion->drv_map_sz);
1658                                goto ld_drv_map_alloc_fail;
1659                        }
1660                }
1661        }
1662
1663        for (i = 0; i < 2; i++) {
1664                fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
1665                                                       fusion->max_map_sz,
1666                                                       &fusion->ld_map_phys[i],
1667                                                       GFP_KERNEL);
1668                if (!fusion->ld_map[i]) {
1669                        dev_err(&instance->pdev->dev,
1670                                "Could not allocate memory for map info %s:%d\n",
1671                                __func__, __LINE__);
1672                        goto ld_map_alloc_fail;
1673                }
1674        }
1675
1676        return 0;
1677
1678ld_map_alloc_fail:
1679        for (i = 0; i < 2; i++) {
1680                if (fusion->ld_map[i])
1681                        dma_free_coherent(&instance->pdev->dev,
1682                                          fusion->max_map_sz,
1683                                          fusion->ld_map[i],
1684                                          fusion->ld_map_phys[i]);
1685        }
1686
1687ld_drv_map_alloc_fail:
1688        for (i = 0; i < 2; i++) {
1689                if (fusion->ld_drv_map[i]) {
1690                        if (is_vmalloc_addr(fusion->ld_drv_map[i]))
1691                                vfree(fusion->ld_drv_map[i]);
1692                        else
1693                                free_pages((ulong)fusion->ld_drv_map[i],
1694                                           fusion->drv_map_pages);
1695                }
1696        }
1697
1698        return -ENOMEM;
1699}
1700
1701/**
1702 * megasas_configure_queue_sizes -      Calculate size of request desc queue,
1703 *                                      reply desc queue,
1704 *                                      IO request frame queue, set can_queue.
1705 * @instance:                           Adapter soft state
1706 * @return:                             void
1707 */
1708static inline
1709void megasas_configure_queue_sizes(struct megasas_instance *instance)
1710{
1711        struct fusion_context *fusion;
1712        u16 max_cmd;
1713
1714        fusion = instance->ctrl_context;
1715        max_cmd = instance->max_fw_cmds;
1716
1717        if (instance->adapter_type >= VENTURA_SERIES)
1718                instance->max_mpt_cmds = instance->max_fw_cmds * RAID_1_PEER_CMDS;
1719        else
1720                instance->max_mpt_cmds = instance->max_fw_cmds;
1721
1722        instance->max_scsi_cmds = instance->max_fw_cmds - instance->max_mfi_cmds;
1723        instance->cur_can_queue = instance->max_scsi_cmds;
1724        instance->host->can_queue = instance->cur_can_queue;
1725
1726        fusion->reply_q_depth = 2 * ((max_cmd + 1 + 15) / 16) * 16;
1727
1728        fusion->request_alloc_sz = sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *
1729                                          instance->max_mpt_cmds;
1730        fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION) *
1731                                        (fusion->reply_q_depth);
1732        fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
1733                (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
1734                 * (instance->max_mpt_cmds + 1)); /* Extra 1 for SMID 0 */
1735}
1736
1737static int megasas_alloc_ioc_init_frame(struct megasas_instance *instance)
1738{
1739        struct fusion_context *fusion;
1740        struct megasas_cmd *cmd;
1741
1742        fusion = instance->ctrl_context;
1743
1744        cmd = kzalloc(sizeof(struct megasas_cmd), GFP_KERNEL);
1745
1746        if (!cmd) {
1747                dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
1748                        __func__, __LINE__);
1749                return -ENOMEM;
1750        }
1751
1752        cmd->frame = dma_alloc_coherent(&instance->pdev->dev,
1753                                        IOC_INIT_FRAME_SIZE,
1754                                        &cmd->frame_phys_addr, GFP_KERNEL);
1755
1756        if (!cmd->frame) {
1757                dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
1758                        __func__, __LINE__);
1759                kfree(cmd);
1760                return -ENOMEM;
1761        }
1762
1763        fusion->ioc_init_cmd = cmd;
1764        return 0;
1765}
1766
1767/**
1768 * megasas_free_ioc_init_cmd -  Free IOC INIT command frame
1769 * @instance:           Adapter soft state
1770 */
1771static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance)
1772{
1773        struct fusion_context *fusion;
1774
1775        fusion = instance->ctrl_context;
1776
1777        if (fusion->ioc_init_cmd && fusion->ioc_init_cmd->frame)
1778                dma_free_coherent(&instance->pdev->dev,
1779                                  IOC_INIT_FRAME_SIZE,
1780                                  fusion->ioc_init_cmd->frame,
1781                                  fusion->ioc_init_cmd->frame_phys_addr);
1782
1783        kfree(fusion->ioc_init_cmd);
1784}
1785
1786/**
1787 * megasas_init_adapter_fusion -        Initializes the FW
1788 * @instance:           Adapter soft state
1789 *
1790 * This is the main function for initializing firmware.
1791 */
1792static u32
1793megasas_init_adapter_fusion(struct megasas_instance *instance)
1794{
1795        struct fusion_context *fusion;
1796        u32 scratch_pad_1;
1797        int i = 0, count;
1798        u32 status_reg;
1799
1800        fusion = instance->ctrl_context;
1801
1802        megasas_fusion_update_can_queue(instance, PROBE_CONTEXT);
1803
1804        /*
1805         * Only Driver's internal DCMDs and IOCTL DCMDs needs to have MFI frames
1806         */
1807        instance->max_mfi_cmds =
1808                MEGASAS_FUSION_INTERNAL_CMDS + MEGASAS_FUSION_IOCTL_CMDS;
1809
1810        megasas_configure_queue_sizes(instance);
1811
1812        scratch_pad_1 = megasas_readl(instance,
1813                                      &instance->reg_set->outbound_scratch_pad_1);
1814        /* If scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK is set,
1815         * Firmware support extended IO chain frame which is 4 times more than
1816         * legacy Firmware.
1817         * Legacy Firmware - Frame size is (8 * 128) = 1K
1818         * 1M IO Firmware  - Frame size is (8 * 128 * 4)  = 4K
1819         */
1820        if (scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK)
1821                instance->max_chain_frame_sz =
1822                        ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
1823                        MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_1MB_IO;
1824        else
1825                instance->max_chain_frame_sz =
1826                        ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
1827                        MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_256K_IO;
1828
1829        if (instance->max_chain_frame_sz < MEGASAS_CHAIN_FRAME_SZ_MIN) {
1830                dev_warn(&instance->pdev->dev, "frame size %d invalid, fall back to legacy max frame size %d\n",
1831                        instance->max_chain_frame_sz,
1832                        MEGASAS_CHAIN_FRAME_SZ_MIN);
1833                instance->max_chain_frame_sz = MEGASAS_CHAIN_FRAME_SZ_MIN;
1834        }
1835
1836        fusion->max_sge_in_main_msg =
1837                (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
1838                        - offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
1839
1840        fusion->max_sge_in_chain =
1841                instance->max_chain_frame_sz
1842                        / sizeof(union MPI2_SGE_IO_UNION);
1843
1844        instance->max_num_sge =
1845                rounddown_pow_of_two(fusion->max_sge_in_main_msg
1846                        + fusion->max_sge_in_chain - 2);
1847
1848        /* Used for pass thru MFI frame (DCMD) */
1849        fusion->chain_offset_mfi_pthru =
1850                offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
1851
1852        fusion->chain_offset_io_request =
1853                (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
1854                 sizeof(union MPI2_SGE_IO_UNION))/16;
1855
1856        count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
1857        count += instance->iopoll_q_count;
1858
1859        for (i = 0 ; i < count; i++)
1860                fusion->last_reply_idx[i] = 0;
1861
1862        /*
1863         * For fusion adapters, 3 commands for IOCTL and 8 commands
1864         * for driver's internal DCMDs.
1865         */
1866        instance->max_scsi_cmds = instance->max_fw_cmds -
1867                                (MEGASAS_FUSION_INTERNAL_CMDS +
1868                                MEGASAS_FUSION_IOCTL_CMDS);
1869        sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS);
1870
1871        for (i = 0; i < MAX_MSIX_QUEUES_FUSION; i++)
1872                atomic_set(&fusion->busy_mq_poll[i], 0);
1873
1874        if (megasas_alloc_ioc_init_frame(instance))
1875                return 1;
1876
1877        /*
1878         * Allocate memory for descriptors
1879         * Create a pool of commands
1880         */
1881        if (megasas_alloc_cmds(instance))
1882                goto fail_alloc_mfi_cmds;
1883        if (megasas_alloc_cmds_fusion(instance))
1884                goto fail_alloc_cmds;
1885
1886        if (megasas_ioc_init_fusion(instance)) {
1887                status_reg = instance->instancet->read_fw_status_reg(instance);
1888                if (((status_reg & MFI_STATE_MASK) == MFI_STATE_FAULT) &&
1889                    (status_reg & MFI_RESET_ADAPTER)) {
1890                        /* Do a chip reset and then retry IOC INIT once */
1891                        if (megasas_adp_reset_wait_for_ready
1892                                (instance, true, 0) == FAILED)
1893                                goto fail_ioc_init;
1894
1895                        if (megasas_ioc_init_fusion(instance))
1896                                goto fail_ioc_init;
1897                } else {
1898                        goto fail_ioc_init;
1899                }
1900        }
1901
1902        megasas_display_intel_branding(instance);
1903        if (megasas_get_ctrl_info(instance)) {
1904                dev_err(&instance->pdev->dev,
1905                        "Could not get controller info. Fail from %s %d\n",
1906                        __func__, __LINE__);
1907                goto fail_ioc_init;
1908        }
1909
1910        instance->flag_ieee = 1;
1911        instance->r1_ldio_hint_default =  MR_R1_LDIO_PIGGYBACK_DEFAULT;
1912        instance->threshold_reply_count = instance->max_fw_cmds / 4;
1913        fusion->fast_path_io = 0;
1914
1915        if (megasas_allocate_raid_maps(instance))
1916                goto fail_ioc_init;
1917
1918        if (!megasas_get_map_info(instance))
1919                megasas_sync_map_info(instance);
1920
1921        return 0;
1922
1923fail_ioc_init:
1924        megasas_free_cmds_fusion(instance);
1925fail_alloc_cmds:
1926        megasas_free_cmds(instance);
1927fail_alloc_mfi_cmds:
1928        megasas_free_ioc_init_cmd(instance);
1929        return 1;
1930}
1931
1932/**
1933 * megasas_fault_detect_work    -       Worker function of
1934 *                                      FW fault handling workqueue.
1935 * @work:       FW fault work struct
1936 */
1937static void
1938megasas_fault_detect_work(struct work_struct *work)
1939{
1940        struct megasas_instance *instance =
1941                container_of(work, struct megasas_instance,
1942                             fw_fault_work.work);
1943        u32 fw_state, dma_state, status;
1944
1945        /* Check the fw state */
1946        fw_state = instance->instancet->read_fw_status_reg(instance) &
1947                        MFI_STATE_MASK;
1948
1949        if (fw_state == MFI_STATE_FAULT) {
1950                dma_state = instance->instancet->read_fw_status_reg(instance) &
1951                                MFI_STATE_DMADONE;
1952                /* Start collecting crash, if DMA bit is done */
1953                if (instance->crash_dump_drv_support &&
1954                    instance->crash_dump_app_support && dma_state) {
1955                        megasas_fusion_crash_dump(instance);
1956                } else {
1957                        if (instance->unload == 0) {
1958                                status = megasas_reset_fusion(instance->host, 0);
1959                                if (status != SUCCESS) {
1960                                        dev_err(&instance->pdev->dev,
1961                                                "Failed from %s %d, do not re-arm timer\n",
1962                                                __func__, __LINE__);
1963                                        return;
1964                                }
1965                        }
1966                }
1967        }
1968
1969        if (instance->fw_fault_work_q)
1970                queue_delayed_work(instance->fw_fault_work_q,
1971                        &instance->fw_fault_work,
1972                        msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
1973}
1974
1975int
1976megasas_fusion_start_watchdog(struct megasas_instance *instance)
1977{
1978        /* Check if the Fault WQ is already started */
1979        if (instance->fw_fault_work_q)
1980                return SUCCESS;
1981
1982        INIT_DELAYED_WORK(&instance->fw_fault_work, megasas_fault_detect_work);
1983
1984        snprintf(instance->fault_handler_work_q_name,
1985                 sizeof(instance->fault_handler_work_q_name),
1986                 "poll_megasas%d_status", instance->host->host_no);
1987
1988        instance->fw_fault_work_q =
1989                create_singlethread_workqueue(instance->fault_handler_work_q_name);
1990        if (!instance->fw_fault_work_q) {
1991                dev_err(&instance->pdev->dev, "Failed from %s %d\n",
1992                        __func__, __LINE__);
1993                return FAILED;
1994        }
1995
1996        queue_delayed_work(instance->fw_fault_work_q,
1997                           &instance->fw_fault_work,
1998                           msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
1999
2000        return SUCCESS;
2001}
2002
2003void
2004megasas_fusion_stop_watchdog(struct megasas_instance *instance)
2005{
2006        struct workqueue_struct *wq;
2007
2008        if (instance->fw_fault_work_q) {
2009                wq = instance->fw_fault_work_q;
2010                instance->fw_fault_work_q = NULL;
2011                if (!cancel_delayed_work_sync(&instance->fw_fault_work))
2012                        flush_workqueue(wq);
2013                destroy_workqueue(wq);
2014        }
2015}
2016
2017/**
2018 * map_cmd_status -     Maps FW cmd status to OS cmd status
2019 * @fusion:             fusion context
2020 * @scmd:               Pointer to cmd
2021 * @status:             status of cmd returned by FW
2022 * @ext_status:         ext status of cmd returned by FW
2023 * @data_length:        command data length
2024 * @sense:              command sense data
2025 */
2026static void
2027map_cmd_status(struct fusion_context *fusion,
2028                struct scsi_cmnd *scmd, u8 status, u8 ext_status,
2029                u32 data_length, u8 *sense)
2030{
2031        u8 cmd_type;
2032        int resid;
2033
2034        cmd_type = megasas_cmd_type(scmd);
2035        switch (status) {
2036
2037        case MFI_STAT_OK:
2038                scmd->result = DID_OK << 16;
2039                break;
2040
2041        case MFI_STAT_SCSI_IO_FAILED:
2042        case MFI_STAT_LD_INIT_IN_PROGRESS:
2043                scmd->result = (DID_ERROR << 16) | ext_status;
2044                break;
2045
2046        case MFI_STAT_SCSI_DONE_WITH_ERROR:
2047
2048                scmd->result = (DID_OK << 16) | ext_status;
2049                if (ext_status == SAM_STAT_CHECK_CONDITION) {
2050                        memset(scmd->sense_buffer, 0,
2051                               SCSI_SENSE_BUFFERSIZE);
2052                        memcpy(scmd->sense_buffer, sense,
2053                               SCSI_SENSE_BUFFERSIZE);
2054                }
2055
2056                /*
2057                 * If the  IO request is partially completed, then MR FW will
2058                 * update "io_request->DataLength" field with actual number of
2059                 * bytes transferred.Driver will set residual bytes count in
2060                 * SCSI command structure.
2061                 */
2062                resid = (scsi_bufflen(scmd) - data_length);
2063                scsi_set_resid(scmd, resid);
2064
2065                if (resid &&
2066                        ((cmd_type == READ_WRITE_LDIO) ||
2067                        (cmd_type == READ_WRITE_SYSPDIO)))
2068                        scmd_printk(KERN_INFO, scmd, "BRCM Debug mfi stat 0x%x, data len"
2069                                " requested/completed 0x%x/0x%x\n",
2070                                status, scsi_bufflen(scmd), data_length);
2071                break;
2072
2073        case MFI_STAT_LD_OFFLINE:
2074        case MFI_STAT_DEVICE_NOT_FOUND:
2075                scmd->result = DID_BAD_TARGET << 16;
2076                break;
2077        case MFI_STAT_CONFIG_SEQ_MISMATCH:
2078                scmd->result = DID_IMM_RETRY << 16;
2079                break;
2080        default:
2081                scmd->result = DID_ERROR << 16;
2082                break;
2083        }
2084}
2085
2086/**
2087 * megasas_is_prp_possible -
2088 * Checks if native NVMe PRPs can be built for the IO
2089 *
2090 * @instance:           Adapter soft state
2091 * @scmd:               SCSI command from the mid-layer
2092 * @sge_count:          scatter gather element count.
2093 *
2094 * Returns:             true: PRPs can be built
2095 *                      false: IEEE SGLs needs to be built
2096 */
2097static bool
2098megasas_is_prp_possible(struct megasas_instance *instance,
2099                        struct scsi_cmnd *scmd, int sge_count)
2100{
2101        u32 data_length = 0;
2102        struct scatterlist *sg_scmd;
2103        bool build_prp = false;
2104        u32 mr_nvme_pg_size;
2105
2106        mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
2107                                MR_DEFAULT_NVME_PAGE_SIZE);
2108        data_length = scsi_bufflen(scmd);
2109        sg_scmd = scsi_sglist(scmd);
2110
2111        /*
2112         * NVMe uses one PRP for each page (or part of a page)
2113         * look at the data length - if 4 pages or less then IEEE is OK
2114         * if  > 5 pages then we need to build a native SGL
2115         * if > 4 and <= 5 pages, then check physical address of 1st SG entry
2116         * if this first size in the page is >= the residual beyond 4 pages
2117         * then use IEEE, otherwise use native SGL
2118         */
2119
2120        if (data_length > (mr_nvme_pg_size * 5)) {
2121                build_prp = true;
2122        } else if ((data_length > (mr_nvme_pg_size * 4)) &&
2123                        (data_length <= (mr_nvme_pg_size * 5)))  {
2124                /* check if 1st SG entry size is < residual beyond 4 pages */
2125                if (sg_dma_len(sg_scmd) < (data_length - (mr_nvme_pg_size * 4)))
2126                        build_prp = true;
2127        }
2128
2129        return build_prp;
2130}
2131
2132/**
2133 * megasas_make_prp_nvme -
2134 * Prepare PRPs(Physical Region Page)- SGLs specific to NVMe drives only
2135 *
2136 * @instance:           Adapter soft state
2137 * @scmd:               SCSI command from the mid-layer
2138 * @sgl_ptr:            SGL to be filled in
2139 * @cmd:                Fusion command frame
2140 * @sge_count:          scatter gather element count.
2141 *
2142 * Returns:             true: PRPs are built
2143 *                      false: IEEE SGLs needs to be built
2144 */
2145static bool
2146megasas_make_prp_nvme(struct megasas_instance *instance, struct scsi_cmnd *scmd,
2147                      struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
2148                      struct megasas_cmd_fusion *cmd, int sge_count)
2149{
2150        int sge_len, offset, num_prp_in_chain = 0;
2151        struct MPI25_IEEE_SGE_CHAIN64 *main_chain_element, *ptr_first_sgl;
2152        u64 *ptr_sgl;
2153        dma_addr_t ptr_sgl_phys;
2154        u64 sge_addr;
2155        u32 page_mask, page_mask_result;
2156        struct scatterlist *sg_scmd;
2157        u32 first_prp_len;
2158        bool build_prp = false;
2159        int data_len = scsi_bufflen(scmd);
2160        u32 mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
2161                                        MR_DEFAULT_NVME_PAGE_SIZE);
2162
2163        build_prp = megasas_is_prp_possible(instance, scmd, sge_count);
2164
2165        if (!build_prp)
2166                return false;
2167
2168        /*
2169         * Nvme has a very convoluted prp format.  One prp is required
2170         * for each page or partial page. Driver need to split up OS sg_list
2171         * entries if it is longer than one page or cross a page
2172         * boundary.  Driver also have to insert a PRP list pointer entry as
2173         * the last entry in each physical page of the PRP list.
2174         *
2175         * NOTE: The first PRP "entry" is actually placed in the first
2176         * SGL entry in the main message as IEEE 64 format.  The 2nd
2177         * entry in the main message is the chain element, and the rest
2178         * of the PRP entries are built in the contiguous pcie buffer.
2179         */
2180        page_mask = mr_nvme_pg_size - 1;
2181        ptr_sgl = (u64 *)cmd->sg_frame;
2182        ptr_sgl_phys = cmd->sg_frame_phys_addr;
2183        memset(ptr_sgl, 0, instance->max_chain_frame_sz);
2184
2185        /* Build chain frame element which holds all prps except first*/
2186        main_chain_element = (struct MPI25_IEEE_SGE_CHAIN64 *)
2187            ((u8 *)sgl_ptr + sizeof(struct MPI25_IEEE_SGE_CHAIN64));
2188
2189        main_chain_element->Address = cpu_to_le64(ptr_sgl_phys);
2190        main_chain_element->NextChainOffset = 0;
2191        main_chain_element->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2192                                        IEEE_SGE_FLAGS_SYSTEM_ADDR |
2193                                        MPI26_IEEE_SGE_FLAGS_NSF_NVME_PRP;
2194
2195        /* Build first prp, sge need not to be page aligned*/
2196        ptr_first_sgl = sgl_ptr;
2197        sg_scmd = scsi_sglist(scmd);
2198        sge_addr = sg_dma_address(sg_scmd);
2199        sge_len = sg_dma_len(sg_scmd);
2200
2201        offset = (u32)(sge_addr & page_mask);
2202        first_prp_len = mr_nvme_pg_size - offset;
2203
2204        ptr_first_sgl->Address = cpu_to_le64(sge_addr);
2205        ptr_first_sgl->Length = cpu_to_le32(first_prp_len);
2206
2207        data_len -= first_prp_len;
2208
2209        if (sge_len > first_prp_len) {
2210                sge_addr += first_prp_len;
2211                sge_len -= first_prp_len;
2212        } else if (sge_len == first_prp_len) {
2213                sg_scmd = sg_next(sg_scmd);
2214                sge_addr = sg_dma_address(sg_scmd);
2215                sge_len = sg_dma_len(sg_scmd);
2216        }
2217
2218        for (;;) {
2219                offset = (u32)(sge_addr & page_mask);
2220
2221                /* Put PRP pointer due to page boundary*/
2222                page_mask_result = (uintptr_t)(ptr_sgl + 1) & page_mask;
2223                if (unlikely(!page_mask_result)) {
2224                        scmd_printk(KERN_NOTICE,
2225                                    scmd, "page boundary ptr_sgl: 0x%p\n",
2226                                    ptr_sgl);
2227                        ptr_sgl_phys += 8;
2228                        *ptr_sgl = cpu_to_le64(ptr_sgl_phys);
2229                        ptr_sgl++;
2230                        num_prp_in_chain++;
2231                }
2232
2233                *ptr_sgl = cpu_to_le64(sge_addr);
2234                ptr_sgl++;
2235                ptr_sgl_phys += 8;
2236                num_prp_in_chain++;
2237
2238                sge_addr += mr_nvme_pg_size;
2239                sge_len -= mr_nvme_pg_size;
2240                data_len -= mr_nvme_pg_size;
2241
2242                if (data_len <= 0)
2243                        break;
2244
2245                if (sge_len > 0)
2246                        continue;
2247
2248                sg_scmd = sg_next(sg_scmd);
2249                sge_addr = sg_dma_address(sg_scmd);
2250                sge_len = sg_dma_len(sg_scmd);
2251        }
2252
2253        main_chain_element->Length =
2254                        cpu_to_le32(num_prp_in_chain * sizeof(u64));
2255
2256        return build_prp;
2257}
2258
2259/**
2260 * megasas_make_sgl_fusion -    Prepares 32-bit SGL
2261 * @instance:           Adapter soft state
2262 * @scp:                SCSI command from the mid-layer
2263 * @sgl_ptr:            SGL to be filled in
2264 * @cmd:                cmd we are working on
2265 * @sge_count:          sge count
2266 *
2267 */
2268static void
2269megasas_make_sgl_fusion(struct megasas_instance *instance,
2270                        struct scsi_cmnd *scp,
2271                        struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
2272                        struct megasas_cmd_fusion *cmd, int sge_count)
2273{
2274        int i, sg_processed;
2275        struct scatterlist *os_sgl;
2276        struct fusion_context *fusion;
2277
2278        fusion = instance->ctrl_context;
2279
2280        if (instance->adapter_type >= INVADER_SERIES) {
2281                struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
2282                sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
2283                sgl_ptr_end->Flags = 0;
2284        }
2285
2286        scsi_for_each_sg(scp, os_sgl, sge_count, i) {
2287                sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl));
2288                sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl));
2289                sgl_ptr->Flags = 0;
2290                if (instance->adapter_type >= INVADER_SERIES)
2291                        if (i == sge_count - 1)
2292                                sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
2293                sgl_ptr++;
2294                sg_processed = i + 1;
2295
2296                if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
2297                    (sge_count > fusion->max_sge_in_main_msg)) {
2298
2299                        struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
2300                        if (instance->adapter_type >= INVADER_SERIES) {
2301                                if ((le16_to_cpu(cmd->io_request->IoFlags) &
2302                                        MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
2303                                        MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
2304                                        cmd->io_request->ChainOffset =
2305                                                fusion->
2306                                                chain_offset_io_request;
2307                                else
2308                                        cmd->io_request->ChainOffset = 0;
2309                        } else
2310                                cmd->io_request->ChainOffset =
2311                                        fusion->chain_offset_io_request;
2312
2313                        sg_chain = sgl_ptr;
2314                        /* Prepare chain element */
2315                        sg_chain->NextChainOffset = 0;
2316                        if (instance->adapter_type >= INVADER_SERIES)
2317                                sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
2318                        else
2319                                sg_chain->Flags =
2320                                        (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2321                                         MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
2322                        sg_chain->Length =  cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed)));
2323                        sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr);
2324
2325                        sgl_ptr =
2326                          (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
2327                        memset(sgl_ptr, 0, instance->max_chain_frame_sz);
2328                }
2329        }
2330}
2331
2332/**
2333 * megasas_make_sgl -   Build Scatter Gather List(SGLs)
2334 * @scp:                SCSI command pointer
2335 * @instance:           Soft instance of controller
2336 * @cmd:                Fusion command pointer
2337 *
2338 * This function will build sgls based on device type.
2339 * For nvme drives, there is different way of building sgls in nvme native
2340 * format- PRPs(Physical Region Page).
2341 *
2342 * Returns the number of sg lists actually used, zero if the sg lists
2343 * is NULL, or -ENOMEM if the mapping failed
2344 */
2345static
2346int megasas_make_sgl(struct megasas_instance *instance, struct scsi_cmnd *scp,
2347                     struct megasas_cmd_fusion *cmd)
2348{
2349        int sge_count;
2350        bool build_prp = false;
2351        struct MPI25_IEEE_SGE_CHAIN64 *sgl_chain64;
2352
2353        sge_count = scsi_dma_map(scp);
2354
2355        if ((sge_count > instance->max_num_sge) || (sge_count <= 0))
2356                return sge_count;
2357
2358        sgl_chain64 = (struct MPI25_IEEE_SGE_CHAIN64 *)&cmd->io_request->SGL;
2359        if ((le16_to_cpu(cmd->io_request->IoFlags) &
2360            MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) &&
2361            (cmd->pd_interface == NVME_PD))
2362                build_prp = megasas_make_prp_nvme(instance, scp, sgl_chain64,
2363                                                  cmd, sge_count);
2364
2365        if (!build_prp)
2366                megasas_make_sgl_fusion(instance, scp, sgl_chain64,
2367                                        cmd, sge_count);
2368
2369        return sge_count;
2370}
2371
2372/**
2373 * megasas_set_pd_lba - Sets PD LBA
2374 * @io_request:         IO request
2375 * @cdb_len:            cdb length
2376 * @io_info:            IO information
2377 * @scp:                SCSI command
2378 * @local_map_ptr:      Raid map
2379 * @ref_tag:            Primary reference tag
2380 *
2381 * Used to set the PD LBA in CDB for FP IOs
2382 */
2383static void
2384megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
2385                   struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
2386                   struct MR_DRV_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
2387{
2388        struct MR_LD_RAID *raid;
2389        u16 ld;
2390        u64 start_blk = io_info->pdBlock;
2391        u8 *cdb = io_request->CDB.CDB32;
2392        u32 num_blocks = io_info->numBlocks;
2393        u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
2394
2395        /* Check if T10 PI (DIF) is enabled for this LD */
2396        ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
2397        raid = MR_LdRaidGet(ld, local_map_ptr);
2398        if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
2399                memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2400                cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
2401                cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
2402
2403                if (scp->sc_data_direction == DMA_FROM_DEVICE)
2404                        cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
2405                else
2406                        cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
2407                cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
2408
2409                /* LBA */
2410                cdb[12] = (u8)((start_blk >> 56) & 0xff);
2411                cdb[13] = (u8)((start_blk >> 48) & 0xff);
2412                cdb[14] = (u8)((start_blk >> 40) & 0xff);
2413                cdb[15] = (u8)((start_blk >> 32) & 0xff);
2414                cdb[16] = (u8)((start_blk >> 24) & 0xff);
2415                cdb[17] = (u8)((start_blk >> 16) & 0xff);
2416                cdb[18] = (u8)((start_blk >> 8) & 0xff);
2417                cdb[19] = (u8)(start_blk & 0xff);
2418
2419                /* Logical block reference tag */
2420                io_request->CDB.EEDP32.PrimaryReferenceTag =
2421                        cpu_to_be32(ref_tag);
2422                io_request->CDB.EEDP32.PrimaryApplicationTagMask = cpu_to_be16(0xffff);
2423                io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */
2424
2425                /* Transfer length */
2426                cdb[28] = (u8)((num_blocks >> 24) & 0xff);
2427                cdb[29] = (u8)((num_blocks >> 16) & 0xff);
2428                cdb[30] = (u8)((num_blocks >> 8) & 0xff);
2429                cdb[31] = (u8)(num_blocks & 0xff);
2430
2431                /* set SCSI IO EEDPFlags */
2432                if (scp->sc_data_direction == DMA_FROM_DEVICE) {
2433                        io_request->EEDPFlags = cpu_to_le16(
2434                                MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
2435                                MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
2436                                MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
2437                                MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
2438                                MPI25_SCSIIO_EEDPFLAGS_DO_NOT_DISABLE_MODE |
2439                                MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD);
2440                } else {
2441                        io_request->EEDPFlags = cpu_to_le16(
2442                                MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
2443                                MPI2_SCSIIO_EEDPFLAGS_INSERT_OP);
2444                }
2445                io_request->Control |= cpu_to_le32((0x4 << 26));
2446                io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size);
2447        } else {
2448                /* Some drives don't support 16/12 byte CDB's, convert to 10 */
2449                if (((cdb_len == 12) || (cdb_len == 16)) &&
2450                    (start_blk <= 0xffffffff)) {
2451                        if (cdb_len == 16) {
2452                                opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
2453                                flagvals = cdb[1];
2454                                groupnum = cdb[14];
2455                                control = cdb[15];
2456                        } else {
2457                                opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
2458                                flagvals = cdb[1];
2459                                groupnum = cdb[10];
2460                                control = cdb[11];
2461                        }
2462
2463                        memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2464
2465                        cdb[0] = opcode;
2466                        cdb[1] = flagvals;
2467                        cdb[6] = groupnum;
2468                        cdb[9] = control;
2469
2470                        /* Transfer length */
2471                        cdb[8] = (u8)(num_blocks & 0xff);
2472                        cdb[7] = (u8)((num_blocks >> 8) & 0xff);
2473
2474                        io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */
2475                        cdb_len = 10;
2476                } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
2477                        /* Convert to 16 byte CDB for large LBA's */
2478                        switch (cdb_len) {
2479                        case 6:
2480                                opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
2481                                control = cdb[5];
2482                                break;
2483                        case 10:
2484                                opcode =
2485                                        cdb[0] == READ_10 ? READ_16 : WRITE_16;
2486                                flagvals = cdb[1];
2487                                groupnum = cdb[6];
2488                                control = cdb[9];
2489                                break;
2490                        case 12:
2491                                opcode =
2492                                        cdb[0] == READ_12 ? READ_16 : WRITE_16;
2493                                flagvals = cdb[1];
2494                                groupnum = cdb[10];
2495                                control = cdb[11];
2496                                break;
2497                        }
2498
2499                        memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2500
2501                        cdb[0] = opcode;
2502                        cdb[1] = flagvals;
2503                        cdb[14] = groupnum;
2504                        cdb[15] = control;
2505
2506                        /* Transfer length */
2507                        cdb[13] = (u8)(num_blocks & 0xff);
2508                        cdb[12] = (u8)((num_blocks >> 8) & 0xff);
2509                        cdb[11] = (u8)((num_blocks >> 16) & 0xff);
2510                        cdb[10] = (u8)((num_blocks >> 24) & 0xff);
2511
2512                        io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */
2513                        cdb_len = 16;
2514                }
2515
2516                /* Normal case, just load LBA here */
2517                switch (cdb_len) {
2518                case 6:
2519                {
2520                        u8 val = cdb[1] & 0xE0;
2521                        cdb[3] = (u8)(start_blk & 0xff);
2522                        cdb[2] = (u8)((start_blk >> 8) & 0xff);
2523                        cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
2524                        break;
2525                }
2526                case 10:
2527                        cdb[5] = (u8)(start_blk & 0xff);
2528                        cdb[4] = (u8)((start_blk >> 8) & 0xff);
2529                        cdb[3] = (u8)((start_blk >> 16) & 0xff);
2530                        cdb[2] = (u8)((start_blk >> 24) & 0xff);
2531                        break;
2532                case 12:
2533                        cdb[5]    = (u8)(start_blk & 0xff);
2534                        cdb[4]    = (u8)((start_blk >> 8) & 0xff);
2535                        cdb[3]    = (u8)((start_blk >> 16) & 0xff);
2536                        cdb[2]    = (u8)((start_blk >> 24) & 0xff);
2537                        break;
2538                case 16:
2539                        cdb[9]    = (u8)(start_blk & 0xff);
2540                        cdb[8]    = (u8)((start_blk >> 8) & 0xff);
2541                        cdb[7]    = (u8)((start_blk >> 16) & 0xff);
2542                        cdb[6]    = (u8)((start_blk >> 24) & 0xff);
2543                        cdb[5]    = (u8)((start_blk >> 32) & 0xff);
2544                        cdb[4]    = (u8)((start_blk >> 40) & 0xff);
2545                        cdb[3]    = (u8)((start_blk >> 48) & 0xff);
2546                        cdb[2]    = (u8)((start_blk >> 56) & 0xff);
2547                        break;
2548                }
2549        }
2550}
2551
2552/**
2553 * megasas_stream_detect -      stream detection on read and and write IOs
2554 * @instance:           Adapter soft state
2555 * @cmd:                    Command to be prepared
2556 * @io_info:            IO Request info
2557 *
2558 */
2559
2560/** stream detection on read and and write IOs */
2561static void megasas_stream_detect(struct megasas_instance *instance,
2562                                  struct megasas_cmd_fusion *cmd,
2563                                  struct IO_REQUEST_INFO *io_info)
2564{
2565        struct fusion_context *fusion = instance->ctrl_context;
2566        u32 device_id = io_info->ldTgtId;
2567        struct LD_STREAM_DETECT *current_ld_sd
2568                = fusion->stream_detect_by_ld[device_id];
2569        u32 *track_stream = &current_ld_sd->mru_bit_map, stream_num;
2570        u32 shifted_values, unshifted_values;
2571        u32 index_value_mask, shifted_values_mask;
2572        int i;
2573        bool is_read_ahead = false;
2574        struct STREAM_DETECT *current_sd;
2575        /* find possible stream */
2576        for (i = 0; i < MAX_STREAMS_TRACKED; ++i) {
2577                stream_num = (*track_stream >>
2578                        (i * BITS_PER_INDEX_STREAM)) &
2579                        STREAM_MASK;
2580                current_sd = &current_ld_sd->stream_track[stream_num];
2581                /* if we found a stream, update the raid
2582                 *  context and also update the mruBitMap
2583                 */
2584                /*      boundary condition */
2585                if ((current_sd->next_seq_lba) &&
2586                    (io_info->ldStartBlock >= current_sd->next_seq_lba) &&
2587                    (io_info->ldStartBlock <= (current_sd->next_seq_lba + 32)) &&
2588                    (current_sd->is_read == io_info->isRead)) {
2589
2590                        if ((io_info->ldStartBlock != current_sd->next_seq_lba) &&
2591                            ((!io_info->isRead) || (!is_read_ahead)))
2592                                /*
2593                                 * Once the API availible we need to change this.
2594                                 * At this point we are not allowing any gap
2595                                 */
2596                                continue;
2597
2598                        SET_STREAM_DETECTED(cmd->io_request->RaidContext.raid_context_g35);
2599                        current_sd->next_seq_lba =
2600                        io_info->ldStartBlock + io_info->numBlocks;
2601                        /*
2602                         *      update the mruBitMap LRU
2603                         */
2604                        shifted_values_mask =
2605                                (1 <<  i * BITS_PER_INDEX_STREAM) - 1;
2606                        shifted_values = ((*track_stream & shifted_values_mask)
2607                                                << BITS_PER_INDEX_STREAM);
2608                        index_value_mask =
2609                                STREAM_MASK << i * BITS_PER_INDEX_STREAM;
2610                        unshifted_values =
2611                                *track_stream & ~(shifted_values_mask |
2612                                index_value_mask);
2613                        *track_stream =
2614                                unshifted_values | shifted_values | stream_num;
2615                        return;
2616                }
2617        }
2618        /*
2619         * if we did not find any stream, create a new one
2620         * from the least recently used
2621         */
2622        stream_num = (*track_stream >>
2623                ((MAX_STREAMS_TRACKED - 1) * BITS_PER_INDEX_STREAM)) &
2624                STREAM_MASK;
2625        current_sd = &current_ld_sd->stream_track[stream_num];
2626        current_sd->is_read = io_info->isRead;
2627        current_sd->next_seq_lba = io_info->ldStartBlock + io_info->numBlocks;
2628        *track_stream = (((*track_stream & ZERO_LAST_STREAM) << 4) | stream_num);
2629        return;
2630}
2631
2632/**
2633 * megasas_set_raidflag_cpu_affinity - This function sets the cpu
2634 * affinity (cpu of the controller) and raid_flags in the raid context
2635 * based on IO type.
2636 *
2637 * @fusion:             Fusion context
2638 * @praid_context:      IO RAID context
2639 * @raid:               LD raid map
2640 * @fp_possible:        Is fast path possible?
2641 * @is_read:            Is read IO?
2642 * @scsi_buff_len:      SCSI command buffer length
2643 *
2644 */
2645static void
2646megasas_set_raidflag_cpu_affinity(struct fusion_context *fusion,
2647                                union RAID_CONTEXT_UNION *praid_context,
2648                                struct MR_LD_RAID *raid, bool fp_possible,
2649                                u8 is_read, u32 scsi_buff_len)
2650{
2651        u8 cpu_sel = MR_RAID_CTX_CPUSEL_0;
2652        struct RAID_CONTEXT_G35 *rctx_g35;
2653
2654        rctx_g35 = &praid_context->raid_context_g35;
2655        if (fp_possible) {
2656                if (is_read) {
2657                        if ((raid->cpuAffinity.pdRead.cpu0) &&
2658                            (raid->cpuAffinity.pdRead.cpu1))
2659                                cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2660                        else if (raid->cpuAffinity.pdRead.cpu1)
2661                                cpu_sel = MR_RAID_CTX_CPUSEL_1;
2662                } else {
2663                        if ((raid->cpuAffinity.pdWrite.cpu0) &&
2664                            (raid->cpuAffinity.pdWrite.cpu1))
2665                                cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2666                        else if (raid->cpuAffinity.pdWrite.cpu1)
2667                                cpu_sel = MR_RAID_CTX_CPUSEL_1;
2668                        /* Fast path cache by pass capable R0/R1 VD */
2669                        if ((raid->level <= 1) &&
2670                            (raid->capability.fp_cache_bypass_capable)) {
2671                                rctx_g35->routing_flags |=
2672                                        (1 << MR_RAID_CTX_ROUTINGFLAGS_SLD_SHIFT);
2673                                rctx_g35->raid_flags =
2674                                        (MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS
2675                                        << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
2676                        }
2677                }
2678        } else {
2679                if (is_read) {
2680                        if ((raid->cpuAffinity.ldRead.cpu0) &&
2681                            (raid->cpuAffinity.ldRead.cpu1))
2682                                cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2683                        else if (raid->cpuAffinity.ldRead.cpu1)
2684                                cpu_sel = MR_RAID_CTX_CPUSEL_1;
2685                } else {
2686                        if ((raid->cpuAffinity.ldWrite.cpu0) &&
2687                            (raid->cpuAffinity.ldWrite.cpu1))
2688                                cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2689                        else if (raid->cpuAffinity.ldWrite.cpu1)
2690                                cpu_sel = MR_RAID_CTX_CPUSEL_1;
2691
2692                        if (is_stream_detected(rctx_g35) &&
2693                            ((raid->level == 5) || (raid->level == 6)) &&
2694                            (raid->writeMode == MR_RL_WRITE_THROUGH_MODE) &&
2695                            (cpu_sel == MR_RAID_CTX_CPUSEL_FCFS))
2696                                cpu_sel = MR_RAID_CTX_CPUSEL_0;
2697                }
2698        }
2699
2700        rctx_g35->routing_flags |=
2701                (cpu_sel << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
2702
2703        /* Always give priority to MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
2704         * vs MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS.
2705         * IO Subtype is not bitmap.
2706         */
2707        if ((fusion->pcie_bw_limitation) && (raid->level == 1) && (!is_read) &&
2708                        (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)) {
2709                praid_context->raid_context_g35.raid_flags =
2710                        (MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
2711                        << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
2712        }
2713}
2714
2715/**
2716 * megasas_build_ldio_fusion -  Prepares IOs to devices
2717 * @instance:           Adapter soft state
2718 * @scp:                SCSI command
2719 * @cmd:                Command to be prepared
2720 *
2721 * Prepares the io_request and chain elements (sg_frame) for IO
2722 * The IO can be for PD (Fast Path) or LD
2723 */
2724static void
2725megasas_build_ldio_fusion(struct megasas_instance *instance,
2726                          struct scsi_cmnd *scp,
2727                          struct megasas_cmd_fusion *cmd)
2728{
2729        bool fp_possible;
2730        u16 ld;
2731        u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
2732        u32 scsi_buff_len;
2733        struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
2734        struct IO_REQUEST_INFO io_info;
2735        struct fusion_context *fusion;
2736        struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
2737        u8 *raidLUN;
2738        unsigned long spinlock_flags;
2739        struct MR_LD_RAID *raid = NULL;
2740        struct MR_PRIV_DEVICE *mrdev_priv;
2741        struct RAID_CONTEXT *rctx;
2742        struct RAID_CONTEXT_G35 *rctx_g35;
2743
2744        device_id = MEGASAS_DEV_INDEX(scp);
2745
2746        fusion = instance->ctrl_context;
2747
2748        io_request = cmd->io_request;
2749        rctx = &io_request->RaidContext.raid_context;
2750        rctx_g35 = &io_request->RaidContext.raid_context_g35;
2751
2752        rctx->virtual_disk_tgt_id = cpu_to_le16(device_id);
2753        rctx->status = 0;
2754        rctx->ex_status = 0;
2755
2756        start_lba_lo = 0;
2757        start_lba_hi = 0;
2758        fp_possible = false;
2759
2760        /*
2761         * 6-byte READ(0x08) or WRITE(0x0A) cdb
2762         */
2763        if (scp->cmd_len == 6) {
2764                datalength = (u32) scp->cmnd[4];
2765                start_lba_lo = ((u32) scp->cmnd[1] << 16) |
2766                        ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
2767
2768                start_lba_lo &= 0x1FFFFF;
2769        }
2770
2771        /*
2772         * 10-byte READ(0x28) or WRITE(0x2A) cdb
2773         */
2774        else if (scp->cmd_len == 10) {
2775                datalength = (u32) scp->cmnd[8] |
2776                        ((u32) scp->cmnd[7] << 8);
2777                start_lba_lo = ((u32) scp->cmnd[2] << 24) |
2778                        ((u32) scp->cmnd[3] << 16) |
2779                        ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2780        }
2781
2782        /*
2783         * 12-byte READ(0xA8) or WRITE(0xAA) cdb
2784         */
2785        else if (scp->cmd_len == 12) {
2786                datalength = ((u32) scp->cmnd[6] << 24) |
2787                        ((u32) scp->cmnd[7] << 16) |
2788                        ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
2789                start_lba_lo = ((u32) scp->cmnd[2] << 24) |
2790                        ((u32) scp->cmnd[3] << 16) |
2791                        ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2792        }
2793
2794        /*
2795         * 16-byte READ(0x88) or WRITE(0x8A) cdb
2796         */
2797        else if (scp->cmd_len == 16) {
2798                datalength = ((u32) scp->cmnd[10] << 24) |
2799                        ((u32) scp->cmnd[11] << 16) |
2800                        ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
2801                start_lba_lo = ((u32) scp->cmnd[6] << 24) |
2802                        ((u32) scp->cmnd[7] << 16) |
2803                        ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
2804
2805                start_lba_hi = ((u32) scp->cmnd[2] << 24) |
2806                        ((u32) scp->cmnd[3] << 16) |
2807                        ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2808        }
2809
2810        memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
2811        io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
2812        io_info.numBlocks = datalength;
2813        io_info.ldTgtId = device_id;
2814        io_info.r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
2815        scsi_buff_len = scsi_bufflen(scp);
2816        io_request->DataLength = cpu_to_le32(scsi_buff_len);
2817        io_info.data_arms = 1;
2818
2819        if (scp->sc_data_direction == DMA_FROM_DEVICE)
2820                io_info.isRead = 1;
2821
2822        local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
2823        ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
2824
2825        if (ld < instance->fw_supported_vd_count)
2826                raid = MR_LdRaidGet(ld, local_map_ptr);
2827
2828        if (!raid || (!fusion->fast_path_io)) {
2829                rctx->reg_lock_flags  = 0;
2830                fp_possible = false;
2831        } else {
2832                if (MR_BuildRaidContext(instance, &io_info, rctx,
2833                                        local_map_ptr, &raidLUN))
2834                        fp_possible = (io_info.fpOkForIo > 0) ? true : false;
2835        }
2836
2837        megasas_get_msix_index(instance, scp, cmd, io_info.data_arms);
2838
2839        if (instance->adapter_type >= VENTURA_SERIES) {
2840                /* FP for Optimal raid level 1.
2841                 * All large RAID-1 writes (> 32 KiB, both WT and WB modes)
2842                 * are built by the driver as LD I/Os.
2843                 * All small RAID-1 WT writes (<= 32 KiB) are built as FP I/Os
2844                 * (there is never a reason to process these as buffered writes)
2845                 * All small RAID-1 WB writes (<= 32 KiB) are built as FP I/Os
2846                 * with the SLD bit asserted.
2847                 */
2848                if (io_info.r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
2849                        mrdev_priv = scp->device->hostdata;
2850
2851                        if (atomic_inc_return(&instance->fw_outstanding) >
2852                                (instance->host->can_queue)) {
2853                                fp_possible = false;
2854                                atomic_dec(&instance->fw_outstanding);
2855                        } else if (fusion->pcie_bw_limitation &&
2856                                ((scsi_buff_len > MR_LARGE_IO_MIN_SIZE) ||
2857                                   (atomic_dec_if_positive(&mrdev_priv->r1_ldio_hint) > 0))) {
2858                                fp_possible = false;
2859                                atomic_dec(&instance->fw_outstanding);
2860                                if (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)
2861                                        atomic_set(&mrdev_priv->r1_ldio_hint,
2862                                                   instance->r1_ldio_hint_default);
2863                        }
2864                }
2865
2866                if (!fp_possible ||
2867                    (io_info.isRead && io_info.ra_capable)) {
2868                        spin_lock_irqsave(&instance->stream_lock,
2869                                          spinlock_flags);
2870                        megasas_stream_detect(instance, cmd, &io_info);
2871                        spin_unlock_irqrestore(&instance->stream_lock,
2872                                               spinlock_flags);
2873                        /* In ventura if stream detected for a read and it is
2874                         * read ahead capable make this IO as LDIO
2875                         */
2876                        if (is_stream_detected(rctx_g35))
2877                                fp_possible = false;
2878                }
2879
2880                /* If raid is NULL, set CPU affinity to default CPU0 */
2881                if (raid)
2882                        megasas_set_raidflag_cpu_affinity(fusion, &io_request->RaidContext,
2883                                raid, fp_possible, io_info.isRead,
2884                                scsi_buff_len);
2885                else
2886                        rctx_g35->routing_flags |=
2887                                (MR_RAID_CTX_CPUSEL_0 << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
2888        }
2889
2890        if (fp_possible) {
2891                megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
2892                                   local_map_ptr, start_lba_lo);
2893                io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
2894                cmd->request_desc->SCSIIO.RequestFlags =
2895                        (MPI2_REQ_DESCRIPT_FLAGS_FP_IO
2896                         << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2897                if (instance->adapter_type == INVADER_SERIES) {
2898                        rctx->type = MPI2_TYPE_CUDA;
2899                        rctx->nseg = 0x1;
2900                        io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
2901                        rctx->reg_lock_flags |=
2902                          (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
2903                           MR_RL_FLAGS_SEQ_NUM_ENABLE);
2904                } else if (instance->adapter_type >= VENTURA_SERIES) {
2905                        rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
2906                        rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2907                        rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2908                        io_request->IoFlags |=
2909                                cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
2910                }
2911                if (fusion->load_balance_info &&
2912                        (fusion->load_balance_info[device_id].loadBalanceFlag) &&
2913                        (io_info.isRead)) {
2914                        io_info.devHandle =
2915                                get_updated_dev_handle(instance,
2916                                        &fusion->load_balance_info[device_id],
2917                                        &io_info, local_map_ptr);
2918                        scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
2919                        cmd->pd_r1_lb = io_info.pd_after_lb;
2920                        if (instance->adapter_type >= VENTURA_SERIES)
2921                                rctx_g35->span_arm = io_info.span_arm;
2922                        else
2923                                rctx->span_arm = io_info.span_arm;
2924
2925                } else
2926                        scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
2927
2928                if (instance->adapter_type >= VENTURA_SERIES)
2929                        cmd->r1_alt_dev_handle = io_info.r1_alt_dev_handle;
2930                else
2931                        cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
2932
2933                if ((raidLUN[0] == 1) &&
2934                        (local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].validHandles > 1)) {
2935                        instance->dev_handle = !(instance->dev_handle);
2936                        io_info.devHandle =
2937                                local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].devHandle[instance->dev_handle];
2938                }
2939
2940                cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
2941                io_request->DevHandle = io_info.devHandle;
2942                cmd->pd_interface = io_info.pd_interface;
2943                /* populate the LUN field */
2944                memcpy(io_request->LUN, raidLUN, 8);
2945        } else {
2946                rctx->timeout_value =
2947                        cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
2948                cmd->request_desc->SCSIIO.RequestFlags =
2949                        (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
2950                         << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2951                if (instance->adapter_type == INVADER_SERIES) {
2952                        if (io_info.do_fp_rlbypass ||
2953                        (rctx->reg_lock_flags == REGION_TYPE_UNUSED))
2954                                cmd->request_desc->SCSIIO.RequestFlags =
2955                                        (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
2956                                        MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2957                        rctx->type = MPI2_TYPE_CUDA;
2958                        rctx->reg_lock_flags |=
2959                                (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
2960                                        MR_RL_FLAGS_SEQ_NUM_ENABLE);
2961                        rctx->nseg = 0x1;
2962                } else if (instance->adapter_type >= VENTURA_SERIES) {
2963                        rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2964                        rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
2965                        rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2966                }
2967                io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
2968                io_request->DevHandle = cpu_to_le16(device_id);
2969
2970        } /* Not FP */
2971}
2972
2973/**
2974 * megasas_build_ld_nonrw_fusion - prepares non rw ios for virtual disk
2975 * @instance:           Adapter soft state
2976 * @scmd:               SCSI command
2977 * @cmd:                Command to be prepared
2978 *
2979 * Prepares the io_request frame for non-rw io cmds for vd.
2980 */
2981static void megasas_build_ld_nonrw_fusion(struct megasas_instance *instance,
2982                          struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd)
2983{
2984        u32 device_id;
2985        struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
2986        u16 ld;
2987        struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
2988        struct fusion_context *fusion = instance->ctrl_context;
2989        u8                          span, physArm;
2990        __le16                      devHandle;
2991        u32                         arRef, pd;
2992        struct MR_LD_RAID                  *raid;
2993        struct RAID_CONTEXT                *pRAID_Context;
2994        u8 fp_possible = 1;
2995
2996        io_request = cmd->io_request;
2997        device_id = MEGASAS_DEV_INDEX(scmd);
2998        local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
2999        io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
3000        /* get RAID_Context pointer */
3001        pRAID_Context = &io_request->RaidContext.raid_context;
3002        /* Check with FW team */
3003        pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3004        pRAID_Context->reg_lock_row_lba    = 0;
3005        pRAID_Context->reg_lock_length    = 0;
3006
3007        if (fusion->fast_path_io && (
3008                device_id < instance->fw_supported_vd_count)) {
3009
3010                ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
3011                if (ld >= instance->fw_supported_vd_count - 1)
3012                        fp_possible = 0;
3013                else {
3014                        raid = MR_LdRaidGet(ld, local_map_ptr);
3015                        if (!(raid->capability.fpNonRWCapable))
3016                                fp_possible = 0;
3017                }
3018        } else
3019                fp_possible = 0;
3020
3021        if (!fp_possible) {
3022                io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
3023                io_request->DevHandle = cpu_to_le16(device_id);
3024                io_request->LUN[1] = scmd->device->lun;
3025                pRAID_Context->timeout_value =
3026                        cpu_to_le16 (scmd->request->timeout / HZ);
3027                cmd->request_desc->SCSIIO.RequestFlags =
3028                        (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3029                        MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3030        } else {
3031
3032                /* set RAID context values */
3033                pRAID_Context->config_seq_num = raid->seqNum;
3034                if (instance->adapter_type < VENTURA_SERIES)
3035                        pRAID_Context->reg_lock_flags = REGION_TYPE_SHARED_READ;
3036                pRAID_Context->timeout_value =
3037                        cpu_to_le16(raid->fpIoTimeoutForLd);
3038
3039                /* get the DevHandle for the PD (since this is
3040                   fpNonRWCapable, this is a single disk RAID0) */
3041                span = physArm = 0;
3042                arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
3043                pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
3044                devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
3045
3046                /* build request descriptor */
3047                cmd->request_desc->SCSIIO.RequestFlags =
3048                        (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
3049                        MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3050                cmd->request_desc->SCSIIO.DevHandle = devHandle;
3051
3052                /* populate the LUN field */
3053                memcpy(io_request->LUN, raid->LUN, 8);
3054
3055                /* build the raidScsiIO structure */
3056                io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
3057                io_request->DevHandle = devHandle;
3058        }
3059}
3060
3061/**
3062 * megasas_build_syspd_fusion - prepares rw/non-rw ios for syspd
3063 * @instance:           Adapter soft state
3064 * @scmd:               SCSI command
3065 * @cmd:                Command to be prepared
3066 * @fp_possible:        parameter to detect fast path or firmware path io.
3067 *
3068 * Prepares the io_request frame for rw/non-rw io cmds for syspds
3069 */
3070static void
3071megasas_build_syspd_fusion(struct megasas_instance *instance,
3072        struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd,
3073        bool fp_possible)
3074{
3075        u32 device_id;
3076        struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
3077        u16 pd_index = 0;
3078        u16 os_timeout_value;
3079        u16 timeout_limit;
3080        struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
3081        struct RAID_CONTEXT     *pRAID_Context;
3082        struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
3083        struct MR_PRIV_DEVICE *mr_device_priv_data;
3084        struct fusion_context *fusion = instance->ctrl_context;
3085        pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id - 1) & 1];
3086
3087        device_id = MEGASAS_DEV_INDEX(scmd);
3088        pd_index = MEGASAS_PD_INDEX(scmd);
3089        os_timeout_value = scmd->request->timeout / HZ;
3090        mr_device_priv_data = scmd->device->hostdata;
3091        cmd->pd_interface = mr_device_priv_data->interface_type;
3092
3093        io_request = cmd->io_request;
3094        /* get RAID_Context pointer */
3095        pRAID_Context = &io_request->RaidContext.raid_context;
3096        pRAID_Context->reg_lock_flags = 0;
3097        pRAID_Context->reg_lock_row_lba = 0;
3098        pRAID_Context->reg_lock_length = 0;
3099        io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
3100        io_request->LUN[1] = scmd->device->lun;
3101        pRAID_Context->raid_flags = MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD
3102                << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
3103
3104        /* If FW supports PD sequence number */
3105        if (instance->support_seqnum_jbod_fp) {
3106                if (instance->use_seqnum_jbod_fp &&
3107                        instance->pd_list[pd_index].driveType == TYPE_DISK) {
3108
3109                        /* More than 256 PD/JBOD support for Ventura */
3110                        if (instance->support_morethan256jbod)
3111                                pRAID_Context->virtual_disk_tgt_id =
3112                                        pd_sync->seq[pd_index].pd_target_id;
3113                        else
3114                                pRAID_Context->virtual_disk_tgt_id =
3115                                        cpu_to_le16(device_id +
3116                                        (MAX_PHYSICAL_DEVICES - 1));
3117                        pRAID_Context->config_seq_num =
3118                                pd_sync->seq[pd_index].seqNum;
3119                        io_request->DevHandle =
3120                                pd_sync->seq[pd_index].devHandle;
3121                        if (instance->adapter_type >= VENTURA_SERIES) {
3122                                io_request->RaidContext.raid_context_g35.routing_flags |=
3123                                        (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
3124                                io_request->RaidContext.raid_context_g35.nseg_type |=
3125                                        (1 << RAID_CONTEXT_NSEG_SHIFT);
3126                                io_request->RaidContext.raid_context_g35.nseg_type |=
3127                                        (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
3128                        } else {
3129                                pRAID_Context->type = MPI2_TYPE_CUDA;
3130                                pRAID_Context->nseg = 0x1;
3131                                pRAID_Context->reg_lock_flags |=
3132                                        (MR_RL_FLAGS_SEQ_NUM_ENABLE |
3133                                         MR_RL_FLAGS_GRANT_DESTINATION_CUDA);
3134                        }
3135                } else {
3136                        pRAID_Context->virtual_disk_tgt_id =
3137                                cpu_to_le16(device_id +
3138                                (MAX_PHYSICAL_DEVICES - 1));
3139                        pRAID_Context->config_seq_num = 0;
3140                        io_request->DevHandle = cpu_to_le16(0xFFFF);
3141                }
3142        } else {
3143                pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3144                pRAID_Context->config_seq_num = 0;
3145
3146                if (fusion->fast_path_io) {
3147                        local_map_ptr =
3148                                fusion->ld_drv_map[(instance->map_id & 1)];
3149                        io_request->DevHandle =
3150                                local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
3151                } else {
3152                        io_request->DevHandle = cpu_to_le16(0xFFFF);
3153                }
3154        }
3155
3156        cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
3157
3158        megasas_get_msix_index(instance, scmd, cmd, 1);
3159
3160        if (!fp_possible) {
3161                /* system pd firmware path */
3162                io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
3163                cmd->request_desc->SCSIIO.RequestFlags =
3164                        (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3165                                MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3166                pRAID_Context->timeout_value = cpu_to_le16(os_timeout_value);
3167                pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3168        } else {
3169                if (os_timeout_value)
3170                        os_timeout_value++;
3171
3172                /* system pd Fast Path */
3173                io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
3174                timeout_limit = (scmd->device->type == TYPE_DISK) ?
3175                                255 : 0xFFFF;
3176                pRAID_Context->timeout_value =
3177                        cpu_to_le16((os_timeout_value > timeout_limit) ?
3178                        timeout_limit : os_timeout_value);
3179                if (instance->adapter_type >= INVADER_SERIES)
3180                        io_request->IoFlags |=
3181                                cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
3182
3183                cmd->request_desc->SCSIIO.RequestFlags =
3184                        (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
3185                                MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3186        }
3187}
3188
3189/**
3190 * megasas_build_io_fusion -    Prepares IOs to devices
3191 * @instance:           Adapter soft state
3192 * @scp:                SCSI command
3193 * @cmd:                Command to be prepared
3194 *
3195 * Invokes helper functions to prepare request frames
3196 * and sets flags appropriate for IO/Non-IO cmd
3197 */
3198static int
3199megasas_build_io_fusion(struct megasas_instance *instance,
3200                        struct scsi_cmnd *scp,
3201                        struct megasas_cmd_fusion *cmd)
3202{
3203        int sge_count;
3204        u8  cmd_type;
3205        u16 pd_index = 0;
3206        u8 drive_type = 0;
3207        struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
3208        struct MR_PRIV_DEVICE *mr_device_priv_data;
3209        mr_device_priv_data = scp->device->hostdata;
3210
3211        /* Zero out some fields so they don't get reused */
3212        memset(io_request->LUN, 0x0, 8);
3213        io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
3214        io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
3215        io_request->EEDPFlags = 0;
3216        io_request->Control = 0;
3217        io_request->EEDPBlockSize = 0;
3218        io_request->ChainOffset = 0;
3219        io_request->RaidContext.raid_context.raid_flags = 0;
3220        io_request->RaidContext.raid_context.type = 0;
3221        io_request->RaidContext.raid_context.nseg = 0;
3222
3223        memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
3224        /*
3225         * Just the CDB length,rest of the Flags are zero
3226         * This will be modified for FP in build_ldio_fusion
3227         */
3228        io_request->IoFlags = cpu_to_le16(scp->cmd_len);
3229
3230        switch (cmd_type = megasas_cmd_type(scp)) {
3231        case READ_WRITE_LDIO:
3232                megasas_build_ldio_fusion(instance, scp, cmd);
3233                break;
3234        case NON_READ_WRITE_LDIO:
3235                megasas_build_ld_nonrw_fusion(instance, scp, cmd);
3236                break;
3237        case READ_WRITE_SYSPDIO:
3238                megasas_build_syspd_fusion(instance, scp, cmd, true);
3239                break;
3240        case NON_READ_WRITE_SYSPDIO:
3241                pd_index = MEGASAS_PD_INDEX(scp);
3242                drive_type = instance->pd_list[pd_index].driveType;
3243                if ((instance->secure_jbod_support ||
3244                     mr_device_priv_data->is_tm_capable) ||
3245                     (instance->adapter_type >= VENTURA_SERIES &&
3246                     drive_type == TYPE_ENCLOSURE))
3247                        megasas_build_syspd_fusion(instance, scp, cmd, false);
3248                else
3249                        megasas_build_syspd_fusion(instance, scp, cmd, true);
3250                break;
3251        default:
3252                break;
3253        }
3254
3255        /*
3256         * Construct SGL
3257         */
3258
3259        sge_count = megasas_make_sgl(instance, scp, cmd);
3260
3261        if (sge_count > instance->max_num_sge || (sge_count < 0)) {
3262                dev_err(&instance->pdev->dev,
3263                        "%s %d sge_count (%d) is out of range. Range is:  0-%d\n",
3264                        __func__, __LINE__, sge_count, instance->max_num_sge);
3265                return 1;
3266        }
3267
3268        if (instance->adapter_type >= VENTURA_SERIES) {
3269                set_num_sge(&io_request->RaidContext.raid_context_g35, sge_count);
3270                cpu_to_le16s(&io_request->RaidContext.raid_context_g35.routing_flags);
3271                cpu_to_le16s(&io_request->RaidContext.raid_context_g35.nseg_type);
3272        } else {
3273                /* numSGE store lower 8 bit of sge_count.
3274                 * numSGEExt store higher 8 bit of sge_count
3275                 */
3276                io_request->RaidContext.raid_context.num_sge = sge_count;
3277                io_request->RaidContext.raid_context.num_sge_ext =
3278                        (u8)(sge_count >> 8);
3279        }
3280
3281        io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING);
3282
3283        if (scp->sc_data_direction == DMA_TO_DEVICE)
3284                io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE);
3285        else if (scp->sc_data_direction == DMA_FROM_DEVICE)
3286                io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ);
3287
3288        io_request->SGLOffset0 =
3289                offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
3290
3291        io_request->SenseBufferLowAddress =
3292                cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));
3293        io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
3294
3295        cmd->scmd = scp;
3296        scp->SCp.ptr = (char *)cmd;
3297
3298        return 0;
3299}
3300
3301static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
3302megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
3303{
3304        u8 *p;
3305        struct fusion_context *fusion;
3306
3307        fusion = instance->ctrl_context;
3308        p = fusion->req_frames_desc +
3309                sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) * index;
3310
3311        return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
3312}
3313
3314
3315/* megasas_prepate_secondRaid1_IO
3316 *  It prepares the raid 1 second IO
3317 */
3318static void megasas_prepare_secondRaid1_IO(struct megasas_instance *instance,
3319                                           struct megasas_cmd_fusion *cmd,
3320                                           struct megasas_cmd_fusion *r1_cmd)
3321{
3322        union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc, *req_desc2 = NULL;
3323        struct fusion_context *fusion;
3324        fusion = instance->ctrl_context;
3325        req_desc = cmd->request_desc;
3326        /* copy the io request frame as well as 8 SGEs data for r1 command*/
3327        memcpy(r1_cmd->io_request, cmd->io_request,
3328               (sizeof(struct MPI2_RAID_SCSI_IO_REQUEST)));
3329        memcpy(&r1_cmd->io_request->SGL, &cmd->io_request->SGL,
3330               (fusion->max_sge_in_main_msg * sizeof(union MPI2_SGE_IO_UNION)));
3331        /*sense buffer is different for r1 command*/
3332        r1_cmd->io_request->SenseBufferLowAddress =
3333                        cpu_to_le32(lower_32_bits(r1_cmd->sense_phys_addr));
3334        r1_cmd->scmd = cmd->scmd;
3335        req_desc2 = megasas_get_request_descriptor(instance,
3336                                                   (r1_cmd->index - 1));
3337        req_desc2->Words = 0;
3338        r1_cmd->request_desc = req_desc2;
3339        req_desc2->SCSIIO.SMID = cpu_to_le16(r1_cmd->index);
3340        req_desc2->SCSIIO.RequestFlags = req_desc->SCSIIO.RequestFlags;
3341        r1_cmd->request_desc->SCSIIO.DevHandle = cmd->r1_alt_dev_handle;
3342        r1_cmd->io_request->DevHandle = cmd->r1_alt_dev_handle;
3343        r1_cmd->r1_alt_dev_handle = cmd->io_request->DevHandle;
3344        cmd->io_request->RaidContext.raid_context_g35.flow_specific.peer_smid =
3345                        cpu_to_le16(r1_cmd->index);
3346        r1_cmd->io_request->RaidContext.raid_context_g35.flow_specific.peer_smid =
3347                        cpu_to_le16(cmd->index);
3348        /*MSIxIndex of both commands request descriptors should be same*/
3349        r1_cmd->request_desc->SCSIIO.MSIxIndex =
3350                        cmd->request_desc->SCSIIO.MSIxIndex;
3351        /*span arm is different for r1 cmd*/
3352        r1_cmd->io_request->RaidContext.raid_context_g35.span_arm =
3353                        cmd->io_request->RaidContext.raid_context_g35.span_arm + 1;
3354}
3355
3356/**
3357 * megasas_build_and_issue_cmd_fusion -Main routine for building and
3358 *                                     issuing non IOCTL cmd
3359 * @instance:                   Adapter soft state
3360 * @scmd:                       pointer to scsi cmd from OS
3361 */
3362static u32
3363megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
3364                                   struct scsi_cmnd *scmd)
3365{
3366        struct megasas_cmd_fusion *cmd, *r1_cmd = NULL;
3367        union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
3368        u32 index;
3369
3370        if ((megasas_cmd_type(scmd) == READ_WRITE_LDIO) &&
3371                instance->ldio_threshold &&
3372                (atomic_inc_return(&instance->ldio_outstanding) >
3373                instance->ldio_threshold)) {
3374                atomic_dec(&instance->ldio_outstanding);
3375                return SCSI_MLQUEUE_DEVICE_BUSY;
3376        }
3377
3378        if (atomic_inc_return(&instance->fw_outstanding) >
3379                        instance->host->can_queue) {
3380                atomic_dec(&instance->fw_outstanding);
3381                return SCSI_MLQUEUE_HOST_BUSY;
3382        }
3383
3384        cmd = megasas_get_cmd_fusion(instance, scmd->request->tag);
3385
3386        if (!cmd) {
3387                atomic_dec(&instance->fw_outstanding);
3388                return SCSI_MLQUEUE_HOST_BUSY;
3389        }
3390
3391        index = cmd->index;
3392
3393        req_desc = megasas_get_request_descriptor(instance, index-1);
3394
3395        req_desc->Words = 0;
3396        cmd->request_desc = req_desc;
3397
3398        if (megasas_build_io_fusion(instance, scmd, cmd)) {
3399                megasas_return_cmd_fusion(instance, cmd);
3400                dev_err(&instance->pdev->dev, "Error building command\n");
3401                cmd->request_desc = NULL;
3402                atomic_dec(&instance->fw_outstanding);
3403                return SCSI_MLQUEUE_HOST_BUSY;
3404        }
3405
3406        req_desc = cmd->request_desc;
3407        req_desc->SCSIIO.SMID = cpu_to_le16(index);
3408
3409        if (cmd->io_request->ChainOffset != 0 &&
3410            cmd->io_request->ChainOffset != 0xF)
3411                dev_err(&instance->pdev->dev, "The chain offset value is not "
3412                       "correct : %x\n", cmd->io_request->ChainOffset);
3413        /*
3414         *      if it is raid 1/10 fp write capable.
3415         *      try to get second command from pool and construct it.
3416         *      From FW, it has confirmed that lba values of two PDs
3417         *      corresponds to single R1/10 LD are always same
3418         *
3419         */
3420        /*      driver side count always should be less than max_fw_cmds
3421         *      to get new command
3422         */
3423        if (cmd->r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
3424                r1_cmd = megasas_get_cmd_fusion(instance,
3425                                (scmd->request->tag + instance->max_fw_cmds));
3426                megasas_prepare_secondRaid1_IO(instance, cmd, r1_cmd);
3427        }
3428
3429
3430        /*
3431         * Issue the command to the FW
3432         */
3433
3434        megasas_sdev_busy_inc(instance, scmd);
3435        megasas_fire_cmd_fusion(instance, req_desc);
3436
3437        if (r1_cmd)
3438                megasas_fire_cmd_fusion(instance, r1_cmd->request_desc);
3439
3440
3441        return 0;
3442}
3443
3444/**
3445 * megasas_complete_r1_command -
3446 * completes R1 FP write commands which has valid peer smid
3447 * @instance:                   Adapter soft state
3448 * @cmd:                        MPT command frame
3449 *
3450 */
3451static inline void
3452megasas_complete_r1_command(struct megasas_instance *instance,
3453                            struct megasas_cmd_fusion *cmd)
3454{
3455        u8 *sense, status, ex_status;
3456        u32 data_length;
3457        u16 peer_smid;
3458        struct fusion_context *fusion;
3459        struct megasas_cmd_fusion *r1_cmd = NULL;
3460        struct scsi_cmnd *scmd_local = NULL;
3461        struct RAID_CONTEXT_G35 *rctx_g35;
3462
3463        rctx_g35 = &cmd->io_request->RaidContext.raid_context_g35;
3464        fusion = instance->ctrl_context;
3465        peer_smid = le16_to_cpu(rctx_g35->flow_specific.peer_smid);
3466
3467        r1_cmd = fusion->cmd_list[peer_smid - 1];
3468        scmd_local = cmd->scmd;
3469        status = rctx_g35->status;
3470        ex_status = rctx_g35->ex_status;
3471        data_length = cmd->io_request->DataLength;
3472        sense = cmd->sense;
3473
3474        cmd->cmd_completed = true;
3475
3476        /* Check if peer command is completed or not*/
3477        if (r1_cmd->cmd_completed) {
3478                rctx_g35 = &r1_cmd->io_request->RaidContext.raid_context_g35;
3479                if (rctx_g35->status != MFI_STAT_OK) {
3480                        status = rctx_g35->status;
3481                        ex_status = rctx_g35->ex_status;
3482                        data_length = r1_cmd->io_request->DataLength;
3483                        sense = r1_cmd->sense;
3484                }
3485
3486                megasas_return_cmd_fusion(instance, r1_cmd);
3487                map_cmd_status(fusion, scmd_local, status, ex_status,
3488                               le32_to_cpu(data_length), sense);
3489                if (instance->ldio_threshold &&
3490                    megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
3491                        atomic_dec(&instance->ldio_outstanding);
3492                scmd_local->SCp.ptr = NULL;
3493                megasas_return_cmd_fusion(instance, cmd);
3494                scsi_dma_unmap(scmd_local);
3495                megasas_sdev_busy_dec(instance, scmd_local);
3496                scmd_local->scsi_done(scmd_local);
3497        }
3498}
3499
3500/**
3501 * complete_cmd_fusion -        Completes command
3502 * @instance:                   Adapter soft state
3503 * @MSIxIndex:                  MSI number
3504 * @irq_context:                IRQ context
3505 *
3506 * Completes all commands that is in reply descriptor queue
3507 */
3508static int
3509complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
3510                    struct megasas_irq_context *irq_context)
3511{
3512        union MPI2_REPLY_DESCRIPTORS_UNION *desc;
3513        struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
3514        struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
3515        struct fusion_context *fusion;
3516        struct megasas_cmd *cmd_mfi;
3517        struct megasas_cmd_fusion *cmd_fusion;
3518        u16 smid, num_completed;
3519        u8 reply_descript_type, *sense, status, extStatus;
3520        u32 device_id, data_length;
3521        union desc_value d_val;
3522        struct LD_LOAD_BALANCE_INFO *lbinfo;
3523        int threshold_reply_count = 0;
3524        struct scsi_cmnd *scmd_local = NULL;
3525        struct MR_TASK_MANAGE_REQUEST *mr_tm_req;
3526        struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_tm_req;
3527
3528        fusion = instance->ctrl_context;
3529
3530        if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
3531                return IRQ_HANDLED;
3532
3533        desc = fusion->reply_frames_desc[MSIxIndex] +
3534                                fusion->last_reply_idx[MSIxIndex];
3535
3536        reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
3537
3538        d_val.word = desc->Words;
3539
3540        reply_descript_type = reply_desc->ReplyFlags &
3541                MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
3542
3543        if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
3544                return IRQ_NONE;
3545
3546        if (irq_context && !atomic_add_unless(&irq_context->in_used, 1, 1))
3547                return 0;
3548
3549        num_completed = 0;
3550
3551        while (d_val.u.low != cpu_to_le32(UINT_MAX) &&
3552               d_val.u.high != cpu_to_le32(UINT_MAX)) {
3553
3554                smid = le16_to_cpu(reply_desc->SMID);
3555                cmd_fusion = fusion->cmd_list[smid - 1];
3556                scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *)
3557                                                cmd_fusion->io_request;
3558
3559                scmd_local = cmd_fusion->scmd;
3560                status = scsi_io_req->RaidContext.raid_context.status;
3561                extStatus = scsi_io_req->RaidContext.raid_context.ex_status;
3562                sense = cmd_fusion->sense;
3563                data_length = scsi_io_req->DataLength;
3564
3565                switch (scsi_io_req->Function) {
3566                case MPI2_FUNCTION_SCSI_TASK_MGMT:
3567                        mr_tm_req = (struct MR_TASK_MANAGE_REQUEST *)
3568                                                cmd_fusion->io_request;
3569                        mpi_tm_req = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *)
3570                                                &mr_tm_req->TmRequest;
3571                        dev_dbg(&instance->pdev->dev, "TM completion:"
3572                                "type: 0x%x TaskMID: 0x%x\n",
3573                                mpi_tm_req->TaskType, mpi_tm_req->TaskMID);
3574                        complete(&cmd_fusion->done);
3575                        break;
3576                case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
3577                        /* Update load balancing info */
3578                        if (fusion->load_balance_info &&
3579                            (cmd_fusion->scmd->SCp.Status &
3580                            MEGASAS_LOAD_BALANCE_FLAG)) {
3581                                device_id = MEGASAS_DEV_INDEX(scmd_local);
3582                                lbinfo = &fusion->load_balance_info[device_id];
3583                                atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]);
3584                                cmd_fusion->scmd->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
3585                        }
3586                        fallthrough;    /* and complete IO */
3587                case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
3588                        atomic_dec(&instance->fw_outstanding);
3589                        if (cmd_fusion->r1_alt_dev_handle == MR_DEVHANDLE_INVALID) {
3590                                map_cmd_status(fusion, scmd_local, status,
3591                                               extStatus, le32_to_cpu(data_length),
3592                                               sense);
3593                                if (instance->ldio_threshold &&
3594                                    (megasas_cmd_type(scmd_local) == READ_WRITE_LDIO))
3595                                        atomic_dec(&instance->ldio_outstanding);
3596                                scmd_local->SCp.ptr = NULL;
3597                                megasas_return_cmd_fusion(instance, cmd_fusion);
3598                                scsi_dma_unmap(scmd_local);
3599                                megasas_sdev_busy_dec(instance, scmd_local);
3600                                scmd_local->scsi_done(scmd_local);
3601                        } else  /* Optimal VD - R1 FP command completion. */
3602                                megasas_complete_r1_command(instance, cmd_fusion);
3603                        break;
3604                case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
3605                        cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
3606                        /* Poll mode. Dummy free.
3607                         * In case of Interrupt mode, caller has reverse check.
3608                         */
3609                        if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) {
3610                                cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE;
3611                                megasas_return_cmd(instance, cmd_mfi);
3612                        } else
3613                                megasas_complete_cmd(instance, cmd_mfi, DID_OK);
3614                        break;
3615                }
3616
3617                fusion->last_reply_idx[MSIxIndex]++;
3618                if (fusion->last_reply_idx[MSIxIndex] >=
3619                    fusion->reply_q_depth)
3620                        fusion->last_reply_idx[MSIxIndex] = 0;
3621
3622                desc->Words = cpu_to_le64(ULLONG_MAX);
3623                num_completed++;
3624                threshold_reply_count++;
3625
3626                /* Get the next reply descriptor */
3627                if (!fusion->last_reply_idx[MSIxIndex])
3628                        desc = fusion->reply_frames_desc[MSIxIndex];
3629                else
3630                        desc++;
3631
3632                reply_desc =
3633                  (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
3634
3635                d_val.word = desc->Words;
3636
3637                reply_descript_type = reply_desc->ReplyFlags &
3638                        MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
3639
3640                if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
3641                        break;
3642                /*
3643                 * Write to reply post host index register after completing threshold
3644                 * number of reply counts and still there are more replies in reply queue
3645                 * pending to be completed
3646                 */
3647                if (threshold_reply_count >= instance->threshold_reply_count) {
3648                        if (instance->msix_combined)
3649                                writel(((MSIxIndex & 0x7) << 24) |
3650                                        fusion->last_reply_idx[MSIxIndex],
3651                                        instance->reply_post_host_index_addr[MSIxIndex/8]);
3652                        else
3653                                writel((MSIxIndex << 24) |
3654                                        fusion->last_reply_idx[MSIxIndex],
3655                                        instance->reply_post_host_index_addr[0]);
3656                        threshold_reply_count = 0;
3657                        if (irq_context) {
3658                                if (!irq_context->irq_poll_scheduled) {
3659                                        irq_context->irq_poll_scheduled = true;
3660                                        irq_context->irq_line_enable = true;
3661                                        irq_poll_sched(&irq_context->irqpoll);
3662                                }
3663                                atomic_dec(&irq_context->in_used);
3664                                return num_completed;
3665                        }
3666                }
3667        }
3668
3669        if (num_completed) {
3670                wmb();
3671                if (instance->msix_combined)
3672                        writel(((MSIxIndex & 0x7) << 24) |
3673                                fusion->last_reply_idx[MSIxIndex],
3674                                instance->reply_post_host_index_addr[MSIxIndex/8]);
3675                else
3676                        writel((MSIxIndex << 24) |
3677                                fusion->last_reply_idx[MSIxIndex],
3678                                instance->reply_post_host_index_addr[0]);
3679                megasas_check_and_restore_queue_depth(instance);
3680        }
3681
3682        if (irq_context)
3683                atomic_dec(&irq_context->in_used);
3684
3685        return num_completed;
3686}
3687
3688int megasas_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
3689{
3690
3691        struct megasas_instance *instance;
3692        int num_entries = 0;
3693        struct fusion_context *fusion;
3694
3695        instance = (struct megasas_instance *)shost->hostdata;
3696
3697        fusion = instance->ctrl_context;
3698
3699        queue_num = queue_num + instance->low_latency_index_start;
3700
3701        if (!atomic_add_unless(&fusion->busy_mq_poll[queue_num], 1, 1))
3702                return 0;
3703
3704        num_entries = complete_cmd_fusion(instance, queue_num, NULL);
3705        atomic_dec(&fusion->busy_mq_poll[queue_num]);
3706
3707        return num_entries;
3708}
3709
3710/**
3711 * megasas_enable_irq_poll() - enable irqpoll
3712 * @instance:                   Adapter soft state
3713 */
3714static void megasas_enable_irq_poll(struct megasas_instance *instance)
3715{
3716        u32 count, i;
3717        struct megasas_irq_context *irq_ctx;
3718
3719        count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3720
3721        for (i = 0; i < count; i++) {
3722                irq_ctx = &instance->irq_context[i];
3723                irq_poll_enable(&irq_ctx->irqpoll);
3724        }
3725}
3726
3727/**
3728 * megasas_sync_irqs -  Synchronizes all IRQs owned by adapter
3729 * @instance_addr:                      Adapter soft state address
3730 */
3731static void megasas_sync_irqs(unsigned long instance_addr)
3732{
3733        u32 count, i;
3734        struct megasas_instance *instance =
3735                (struct megasas_instance *)instance_addr;
3736        struct megasas_irq_context *irq_ctx;
3737
3738        count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3739
3740        for (i = 0; i < count; i++) {
3741                synchronize_irq(pci_irq_vector(instance->pdev, i));
3742                irq_ctx = &instance->irq_context[i];
3743                irq_poll_disable(&irq_ctx->irqpoll);
3744                if (irq_ctx->irq_poll_scheduled) {
3745                        irq_ctx->irq_poll_scheduled = false;
3746                        enable_irq(irq_ctx->os_irq);
3747                        complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx);
3748                }
3749        }
3750}
3751
3752/**
3753 * megasas_irqpoll() - process a queue for completed reply descriptors
3754 * @irqpoll:    IRQ poll structure associated with queue to poll.
3755 * @budget:     Threshold of reply descriptors to process per poll.
3756 *
3757 * Return: The number of entries processed.
3758 */
3759
3760int megasas_irqpoll(struct irq_poll *irqpoll, int budget)
3761{
3762        struct megasas_irq_context *irq_ctx;
3763        struct megasas_instance *instance;
3764        int num_entries;
3765
3766        irq_ctx = container_of(irqpoll, struct megasas_irq_context, irqpoll);
3767        instance = irq_ctx->instance;
3768
3769        if (irq_ctx->irq_line_enable) {
3770                disable_irq_nosync(irq_ctx->os_irq);
3771                irq_ctx->irq_line_enable = false;
3772        }
3773
3774        num_entries = complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx);
3775        if (num_entries < budget) {
3776                irq_poll_complete(irqpoll);
3777                irq_ctx->irq_poll_scheduled = false;
3778                enable_irq(irq_ctx->os_irq);
3779                complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx);
3780        }
3781
3782        return num_entries;
3783}
3784
3785/**
3786 * megasas_complete_cmd_dpc_fusion -    Completes command
3787 * @instance_addr:                      Adapter soft state address
3788 *
3789 * Tasklet to complete cmds
3790 */
3791static void
3792megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
3793{
3794        struct megasas_instance *instance =
3795                (struct megasas_instance *)instance_addr;
3796        struct megasas_irq_context *irq_ctx = NULL;
3797        u32 count, MSIxIndex;
3798
3799        count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3800
3801        /* If we have already declared adapter dead, donot complete cmds */
3802        if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
3803                return;
3804
3805        for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++) {
3806                irq_ctx = &instance->irq_context[MSIxIndex];
3807                complete_cmd_fusion(instance, MSIxIndex, irq_ctx);
3808        }
3809}
3810
3811/**
3812 * megasas_isr_fusion - isr entry point
3813 * @irq:        IRQ number
3814 * @devp:       IRQ context
3815 */
3816static irqreturn_t megasas_isr_fusion(int irq, void *devp)
3817{
3818        struct megasas_irq_context *irq_context = devp;
3819        struct megasas_instance *instance = irq_context->instance;
3820        u32 mfiStatus;
3821
3822        if (instance->mask_interrupts)
3823                return IRQ_NONE;
3824
3825        if (irq_context->irq_poll_scheduled)
3826                return IRQ_HANDLED;
3827
3828        if (!instance->msix_vectors) {
3829                mfiStatus = instance->instancet->clear_intr(instance);
3830                if (!mfiStatus)
3831                        return IRQ_NONE;
3832        }
3833
3834        /* If we are resetting, bail */
3835        if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
3836                instance->instancet->clear_intr(instance);
3837                return IRQ_HANDLED;
3838        }
3839
3840        return complete_cmd_fusion(instance, irq_context->MSIxIndex, irq_context)
3841                        ? IRQ_HANDLED : IRQ_NONE;
3842}
3843
3844/**
3845 * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
3846 * @instance:                   Adapter soft state
3847 * @mfi_cmd:                    megasas_cmd pointer
3848 *
3849 */
3850static void
3851build_mpt_mfi_pass_thru(struct megasas_instance *instance,
3852                        struct megasas_cmd *mfi_cmd)
3853{
3854        struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
3855        struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
3856        struct megasas_cmd_fusion *cmd;
3857        struct fusion_context *fusion;
3858        struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
3859
3860        fusion = instance->ctrl_context;
3861
3862        cmd = megasas_get_cmd_fusion(instance,
3863                        instance->max_scsi_cmds + mfi_cmd->index);
3864
3865        /*  Save the smid. To be used for returning the cmd */
3866        mfi_cmd->context.smid = cmd->index;
3867
3868        /*
3869         * For cmds where the flag is set, store the flag and check
3870         * on completion. For cmds with this flag, don't call
3871         * megasas_complete_cmd
3872         */
3873
3874        if (frame_hdr->flags & cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE))
3875                mfi_cmd->flags |= DRV_DCMD_POLLED_MODE;
3876
3877        io_req = cmd->io_request;
3878
3879        if (instance->adapter_type >= INVADER_SERIES) {
3880                struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
3881                        (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
3882                sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
3883                sgl_ptr_end->Flags = 0;
3884        }
3885
3886        mpi25_ieee_chain =
3887          (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
3888
3889        io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
3890        io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
3891                                       SGL) / 4;
3892        io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
3893
3894        mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr);
3895
3896        mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
3897                MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
3898
3899        mpi25_ieee_chain->Length = cpu_to_le32(instance->mfi_frame_size);
3900}
3901
3902/**
3903 * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
3904 * @instance:                   Adapter soft state
3905 * @cmd:                        mfi cmd to build
3906 *
3907 */
3908static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
3909build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
3910{
3911        union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc = NULL;
3912        u16 index;