OSCL-LXR linux-6.0.1/​drivers/​scsi/​megaraid/​megaraid_sas_fusion.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Linux MegaRAID driver for SAS based RAID controllers
  *
  *  Copyright (c) 2009-2013  LSI Corporation
  *  Copyright (c) 2013-2016  Avago Technologies
  *  Copyright (c) 2016-2018  Broadcom Inc.
  *
  *  FILE: megaraid_sas_fusion.c
  *
  *  Authors: Broadcom Inc.
  *           Sumant Patro
  *           Adam Radford
  *           Kashyap Desai <kashyap.desai@broadcom.com>
  *           Sumit Saxena <sumit.saxena@broadcom.com>
  *
  *  Send feedback to: megaraidlinux.pdl@broadcom.com
  */
 
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/list.h>
 #include <linux/moduleparam.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/uio.h>
 #include <linux/uaccess.h>
 #include <linux/fs.h>
 #include <linux/compat.h>
 #include <linux/blkdev.h>
 #include <linux/mutex.h>
 #include <linux/poll.h>
 #include <linux/vmalloc.h>
 #include <linux/workqueue.h>
 #include <linux/irq_poll.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_device.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_dbg.h>
 #include <linux/dmi.h>
 
 #include "megaraid_sas_fusion.h"
 #include "megaraid_sas.h"
 
 
 extern void
 megasas_complete_cmd(struct megasas_instance *instance,
              struct megasas_cmd *cmd, u8 alt_status);
 int
 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
           int seconds);
 
 int
 megasas_clear_intr_fusion(struct megasas_instance *instance);
 
 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
 
 extern u32 megasas_dbg_lvl;
 int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
                   int initial);
 extern struct megasas_mgmt_info megasas_mgmt_info;
 extern unsigned int resetwaittime;
 extern unsigned int dual_qdepth_disable;
 static void megasas_free_rdpq_fusion(struct megasas_instance *instance);
 static void megasas_free_reply_fusion(struct megasas_instance *instance);
 static inline
 void megasas_configure_queue_sizes(struct megasas_instance *instance);
 static void megasas_fusion_crash_dump(struct megasas_instance *instance);
 
 /**
  * megasas_adp_reset_wait_for_ready -   initiate chip reset and wait for
  *                  controller to come to ready state
  * @instance:               adapter's soft state
  * @do_adp_reset:           If true, do a chip reset
  * @ocr_context:            If called from OCR context this will
  *                  be set to 1, else 0
  *
  * This function initates a chip reset followed by a wait for controller to
  * transition to ready state.
  * During this, driver will block all access to PCI config space from userspace
  */
 int
 megasas_adp_reset_wait_for_ready(struct megasas_instance *instance,
                  bool do_adp_reset,
                  int ocr_context)
 {
     int ret = FAILED;
 
     /*
      * Block access to PCI config space from userspace
      * when diag reset is initiated from driver
      */
     if (megasas_dbg_lvl & OCR_DEBUG)
         dev_info(&instance->pdev->dev,
              "Block access to PCI config space %s %d\n",
              __func__, __LINE__);
 
     pci_cfg_access_lock(instance->pdev);
 
     if (do_adp_reset) {
         if (instance->instancet->adp_reset
             (instance, instance->reg_set))
             goto out;
     }
 
     /* Wait for FW to become ready */
     if (megasas_transition_to_ready(instance, ocr_context)) {
         dev_warn(&instance->pdev->dev,
              "Failed to transition controller to ready for scsi%d.\n",
              instance->host->host_no);
         goto out;
     }
 
     ret = SUCCESS;
 out:
     if (megasas_dbg_lvl & OCR_DEBUG)
         dev_info(&instance->pdev->dev,
              "Unlock access to PCI config space %s %d\n",
              __func__, __LINE__);
 
     pci_cfg_access_unlock(instance->pdev);
 
     return ret;
 }
 
 /**
  * megasas_check_same_4gb_region -  check if allocation
  *                  crosses same 4GB boundary or not
  * @instance:               adapter's soft instance
  * @start_addr:             start address of DMA allocation
  * @size:               size of allocation in bytes
  * @return:             true : allocation does not cross same
  *                  4GB boundary
  *                  false: allocation crosses same
  *                  4GB boundary
  */
 static inline bool megasas_check_same_4gb_region
     (struct megasas_instance *instance, dma_addr_t start_addr, size_t size)
 {
     dma_addr_t end_addr;
 
     end_addr = start_addr + size;
 
     if (upper_32_bits(start_addr) != upper_32_bits(end_addr)) {
         dev_err(&instance->pdev->dev,
             "Failed to get same 4GB boundary: start_addr: 0x%llx end_addr: 0x%llx\n",
             (unsigned long long)start_addr,
             (unsigned long long)end_addr);
         return false;
     }
 
     return true;
 }
 
 /**
  * megasas_enable_intr_fusion - Enables interrupts
  * @instance:   adapter's soft instance
  */
 static void
 megasas_enable_intr_fusion(struct megasas_instance *instance)
 {
     struct megasas_register_set __iomem *regs;
     regs = instance->reg_set;
 
     instance->mask_interrupts = 0;
     /* For Thunderbolt/Invader also clear intr on enable */
     writel(~0, &regs->outbound_intr_status);
     readl(&regs->outbound_intr_status);
 
     writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 
     /* Dummy readl to force pci flush */
     dev_info(&instance->pdev->dev, "%s is called outbound_intr_mask:0x%08x\n",
          __func__, readl(&regs->outbound_intr_mask));
 }
 
 /**
  * megasas_disable_intr_fusion - Disables interrupt
  * @instance:   adapter's soft instance
  */
 static void
 megasas_disable_intr_fusion(struct megasas_instance *instance)
 {
     u32 mask = 0xFFFFFFFF;
     struct megasas_register_set __iomem *regs;
     regs = instance->reg_set;
     instance->mask_interrupts = 1;
 
     writel(mask, &regs->outbound_intr_mask);
     /* Dummy readl to force pci flush */
     dev_info(&instance->pdev->dev, "%s is called outbound_intr_mask:0x%08x\n",
          __func__, readl(&regs->outbound_intr_mask));
 }
 
 int
 megasas_clear_intr_fusion(struct megasas_instance *instance)
 {
     u32 status;
     struct megasas_register_set __iomem *regs;
     regs = instance->reg_set;
     /*
      * Check if it is our interrupt
      */
     status = megasas_readl(instance,
                    &regs->outbound_intr_status);
 
     if (status & 1) {
         writel(status, &regs->outbound_intr_status);
         readl(&regs->outbound_intr_status);
         return 1;
     }
     if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
         return 0;
 
     return 1;
 }
 
 static inline void
 megasas_sdev_busy_inc(struct megasas_instance *instance,
               struct scsi_cmnd *scmd)
 {
     if (instance->perf_mode == MR_BALANCED_PERF_MODE) {
         struct MR_PRIV_DEVICE *mr_device_priv_data =
             scmd->device->hostdata;
         atomic_inc(&mr_device_priv_data->sdev_priv_busy);
     }
 }
 
 static inline void
 megasas_sdev_busy_dec(struct megasas_instance *instance,
               struct scsi_cmnd *scmd)
 {
     if (instance->perf_mode == MR_BALANCED_PERF_MODE) {
         struct MR_PRIV_DEVICE *mr_device_priv_data =
             scmd->device->hostdata;
         atomic_dec(&mr_device_priv_data->sdev_priv_busy);
     }
 }
 
 static inline int
 megasas_sdev_busy_read(struct megasas_instance *instance,
                struct scsi_cmnd *scmd)
 {
     if (instance->perf_mode == MR_BALANCED_PERF_MODE) {
         struct MR_PRIV_DEVICE *mr_device_priv_data =
             scmd->device->hostdata;
         return atomic_read(&mr_device_priv_data->sdev_priv_busy);
     }
     return 0;
 }
 
 /**
  * megasas_get_cmd_fusion - Get a command from the free pool
  * @instance:       Adapter soft state
  * @blk_tag:        Command tag
  *
  * Returns a blk_tag indexed mpt frame
  */
 inline struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
                           *instance, u32 blk_tag)
 {
     struct fusion_context *fusion;
 
     fusion = instance->ctrl_context;
     return fusion->cmd_list[blk_tag];
 }
 
 /**
  * megasas_return_cmd_fusion -  Return a cmd to free command pool
  * @instance:       Adapter soft state
  * @cmd:        Command packet to be returned to free command pool
  */
 inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
     struct megasas_cmd_fusion *cmd)
 {
     cmd->scmd = NULL;
     memset(cmd->io_request, 0, MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE);
     cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
     cmd->cmd_completed = false;
 }
 
 /**
  * megasas_write_64bit_req_desc -   PCI writes 64bit request descriptor
  * @instance:               Adapter soft state
  * @req_desc:               64bit Request descriptor
  */
 static void
 megasas_write_64bit_req_desc(struct megasas_instance *instance,
         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc)
 {
 #if defined(writeq) && defined(CONFIG_64BIT)
     u64 req_data = (((u64)le32_to_cpu(req_desc->u.high) << 32) |
         le32_to_cpu(req_desc->u.low));
     writeq(req_data, &instance->reg_set->inbound_low_queue_port);
 #else
     unsigned long flags;
     spin_lock_irqsave(&instance->hba_lock, flags);
     writel(le32_to_cpu(req_desc->u.low),
         &instance->reg_set->inbound_low_queue_port);
     writel(le32_to_cpu(req_desc->u.high),
         &instance->reg_set->inbound_high_queue_port);
     spin_unlock_irqrestore(&instance->hba_lock, flags);
 #endif
 }
 
 /**
  * megasas_fire_cmd_fusion -    Sends command to the FW
  * @instance:           Adapter soft state
  * @req_desc:           32bit or 64bit Request descriptor
  *
  * Perform PCI Write. AERO SERIES supports 32 bit Descriptor.
  * Prior to AERO_SERIES support 64 bit Descriptor.
  */
 static void
 megasas_fire_cmd_fusion(struct megasas_instance *instance,
         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc)
 {
     if (instance->atomic_desc_support)
         writel(le32_to_cpu(req_desc->u.low),
             &instance->reg_set->inbound_single_queue_port);
     else
         megasas_write_64bit_req_desc(instance, req_desc);
 }
 
 /**
  * megasas_fusion_update_can_queue -    Do all Adapter Queue depth related calculations here
  * @instance:       Adapter soft state
  * @fw_boot_context:    Whether this function called during probe or after OCR
  *
  * This function is only for fusion controllers.
  * Update host can queue, if firmware downgrade max supported firmware commands.
  * Firmware upgrade case will be skiped because underlying firmware has
  * more resource than exposed to the OS.
  *
  */
 static void
 megasas_fusion_update_can_queue(struct megasas_instance *instance, int fw_boot_context)
 {
     u16 cur_max_fw_cmds = 0;
     u16 ldio_threshold = 0;
 
     /* ventura FW does not fill outbound_scratch_pad_2 with queue depth */
     if (instance->adapter_type < VENTURA_SERIES)
         cur_max_fw_cmds =
         megasas_readl(instance,
                   &instance->reg_set->outbound_scratch_pad_2) & 0x00FFFF;
 
     if (dual_qdepth_disable || !cur_max_fw_cmds)
         cur_max_fw_cmds = instance->instancet->read_fw_status_reg(instance) & 0x00FFFF;
     else
         ldio_threshold =
             (instance->instancet->read_fw_status_reg(instance) & 0x00FFFF) - MEGASAS_FUSION_IOCTL_CMDS;
 
     dev_info(&instance->pdev->dev,
          "Current firmware supports maximum commands: %d\t LDIO threshold: %d\n",
          cur_max_fw_cmds, ldio_threshold);
 
     if (fw_boot_context == OCR_CONTEXT) {
         cur_max_fw_cmds = cur_max_fw_cmds - 1;
         if (cur_max_fw_cmds < instance->max_fw_cmds) {
             instance->cur_can_queue =
                 cur_max_fw_cmds - (MEGASAS_FUSION_INTERNAL_CMDS +
                         MEGASAS_FUSION_IOCTL_CMDS);
             instance->host->can_queue = instance->cur_can_queue;
             instance->ldio_threshold = ldio_threshold;
         }
     } else {
         instance->max_fw_cmds = cur_max_fw_cmds;
         instance->ldio_threshold = ldio_threshold;
 
         if (reset_devices)
             instance->max_fw_cmds = min(instance->max_fw_cmds,
                         (u16)MEGASAS_KDUMP_QUEUE_DEPTH);
         /*
         * Reduce the max supported cmds by 1. This is to ensure that the
         * reply_q_sz (1 more than the max cmd that driver may send)
         * does not exceed max cmds that the FW can support
         */
         instance->max_fw_cmds = instance->max_fw_cmds-1;
     }
 }
 
 static inline void
 megasas_get_msix_index(struct megasas_instance *instance,
                struct scsi_cmnd *scmd,
                struct megasas_cmd_fusion *cmd,
                u8 data_arms)
 {
     if (instance->perf_mode == MR_BALANCED_PERF_MODE &&
         (megasas_sdev_busy_read(instance, scmd) >
          (data_arms * MR_DEVICE_HIGH_IOPS_DEPTH))) {
         cmd->request_desc->SCSIIO.MSIxIndex =
             mega_mod64((atomic64_add_return(1, &instance->high_iops_outstanding) /
                     MR_HIGH_IOPS_BATCH_COUNT), instance->low_latency_index_start);
     } else if (instance->msix_load_balance) {
         cmd->request_desc->SCSIIO.MSIxIndex =
             (mega_mod64(atomic64_add_return(1, &instance->total_io_count),
                 instance->msix_vectors));
     } else if (instance->host->nr_hw_queues > 1) {
         u32 tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
 
         cmd->request_desc->SCSIIO.MSIxIndex = blk_mq_unique_tag_to_hwq(tag) +
             instance->low_latency_index_start;
     } else {
         cmd->request_desc->SCSIIO.MSIxIndex =
             instance->reply_map[raw_smp_processor_id()];
     }
 }
 
 /**
  * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
  * @instance:       Adapter soft state
  */
 void
 megasas_free_cmds_fusion(struct megasas_instance *instance)
 {
     int i;
     struct fusion_context *fusion = instance->ctrl_context;
     struct megasas_cmd_fusion *cmd;
 
     if (fusion->sense)
         dma_pool_free(fusion->sense_dma_pool, fusion->sense,
                   fusion->sense_phys_addr);
 
     /* SG */
     if (fusion->cmd_list) {
         for (i = 0; i < instance->max_mpt_cmds; i++) {
             cmd = fusion->cmd_list[i];
             if (cmd) {
                 if (cmd->sg_frame)
                     dma_pool_free(fusion->sg_dma_pool,
                               cmd->sg_frame,
                               cmd->sg_frame_phys_addr);
             }
             kfree(cmd);
         }
         kfree(fusion->cmd_list);
     }
 
     if (fusion->sg_dma_pool) {
         dma_pool_destroy(fusion->sg_dma_pool);
         fusion->sg_dma_pool = NULL;
     }
     if (fusion->sense_dma_pool) {
         dma_pool_destroy(fusion->sense_dma_pool);
         fusion->sense_dma_pool = NULL;
     }
 
 
     /* Reply Frame, Desc*/
     if (instance->is_rdpq)
         megasas_free_rdpq_fusion(instance);
     else
         megasas_free_reply_fusion(instance);
 
     /* Request Frame, Desc*/
     if (fusion->req_frames_desc)
         dma_free_coherent(&instance->pdev->dev,
             fusion->request_alloc_sz, fusion->req_frames_desc,
             fusion->req_frames_desc_phys);
     if (fusion->io_request_frames)
         dma_pool_free(fusion->io_request_frames_pool,
             fusion->io_request_frames,
             fusion->io_request_frames_phys);
     if (fusion->io_request_frames_pool) {
         dma_pool_destroy(fusion->io_request_frames_pool);
         fusion->io_request_frames_pool = NULL;
     }
 }
 
 /**
  * megasas_create_sg_sense_fusion - Creates DMA pool for cmd frames
  * @instance:           Adapter soft state
  *
  */
 static int megasas_create_sg_sense_fusion(struct megasas_instance *instance)
 {
     int i;
     u16 max_cmd;
     struct fusion_context *fusion;
     struct megasas_cmd_fusion *cmd;
     int sense_sz;
     u32 offset;
 
     fusion = instance->ctrl_context;
     max_cmd = instance->max_fw_cmds;
     sense_sz = instance->max_mpt_cmds * SCSI_SENSE_BUFFERSIZE;
 
     fusion->sg_dma_pool =
             dma_pool_create("mr_sg", &instance->pdev->dev,
                 instance->max_chain_frame_sz,
                 MR_DEFAULT_NVME_PAGE_SIZE, 0);
     /* SCSI_SENSE_BUFFERSIZE  = 96 bytes */
     fusion->sense_dma_pool =
             dma_pool_create("mr_sense", &instance->pdev->dev,
                 sense_sz, 64, 0);
 
     if (!fusion->sense_dma_pool || !fusion->sg_dma_pool) {
         dev_err(&instance->pdev->dev,
             "Failed from %s %d\n",  __func__, __LINE__);
         return -ENOMEM;
     }
 
     fusion->sense = dma_pool_alloc(fusion->sense_dma_pool,
                        GFP_KERNEL, &fusion->sense_phys_addr);
     if (!fusion->sense) {
         dev_err(&instance->pdev->dev,
             "failed from %s %d\n",  __func__, __LINE__);
         return -ENOMEM;
     }
 
     /* sense buffer, request frame and reply desc pool requires to be in
      * same 4 gb region. Below function will check this.
      * In case of failure, new pci pool will be created with updated
      * alignment.
      * Older allocation and pool will be destroyed.
      * Alignment will be used such a way that next allocation if success,
      * will always meet same 4gb region requirement.
      * Actual requirement is not alignment, but we need start and end of
      * DMA address must have same upper 32 bit address.
      */
 
     if (!megasas_check_same_4gb_region(instance, fusion->sense_phys_addr,
                        sense_sz)) {
         dma_pool_free(fusion->sense_dma_pool, fusion->sense,
                   fusion->sense_phys_addr);
         fusion->sense = NULL;
         dma_pool_destroy(fusion->sense_dma_pool);
 
         fusion->sense_dma_pool =
             dma_pool_create("mr_sense_align", &instance->pdev->dev,
                     sense_sz, roundup_pow_of_two(sense_sz),
                     0);
         if (!fusion->sense_dma_pool) {
             dev_err(&instance->pdev->dev,
                 "Failed from %s %d\n",  __func__, __LINE__);
             return -ENOMEM;
         }
         fusion->sense = dma_pool_alloc(fusion->sense_dma_pool,
                            GFP_KERNEL,
                            &fusion->sense_phys_addr);
         if (!fusion->sense) {
             dev_err(&instance->pdev->dev,
                 "failed from %s %d\n",  __func__, __LINE__);
             return -ENOMEM;
         }
     }
 
     /*
      * Allocate and attach a frame to each of the commands in cmd_list
      */
     for (i = 0; i < max_cmd; i++) {
         cmd = fusion->cmd_list[i];
         cmd->sg_frame = dma_pool_alloc(fusion->sg_dma_pool,
                     GFP_KERNEL, &cmd->sg_frame_phys_addr);
 
         offset = SCSI_SENSE_BUFFERSIZE * i;
         cmd->sense = (u8 *)fusion->sense + offset;
         cmd->sense_phys_addr = fusion->sense_phys_addr + offset;
 
         if (!cmd->sg_frame) {
             dev_err(&instance->pdev->dev,
                 "Failed from %s %d\n",  __func__, __LINE__);
             return -ENOMEM;
         }
     }
 
     /* create sense buffer for the raid 1/10 fp */
     for (i = max_cmd; i < instance->max_mpt_cmds; i++) {
         cmd = fusion->cmd_list[i];
         offset = SCSI_SENSE_BUFFERSIZE * i;
         cmd->sense = (u8 *)fusion->sense + offset;
         cmd->sense_phys_addr = fusion->sense_phys_addr + offset;
 
     }
 
     return 0;
 }
 
 static int
 megasas_alloc_cmdlist_fusion(struct megasas_instance *instance)
 {
     u32 max_mpt_cmd, i, j;
     struct fusion_context *fusion;
 
     fusion = instance->ctrl_context;
 
     max_mpt_cmd = instance->max_mpt_cmds;
 
     /*
      * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
      * Allocate the dynamic array first and then allocate individual
      * commands.
      */
     fusion->cmd_list =
         kcalloc(max_mpt_cmd, sizeof(struct megasas_cmd_fusion *),
             GFP_KERNEL);
     if (!fusion->cmd_list) {
         dev_err(&instance->pdev->dev,
             "Failed from %s %d\n",  __func__, __LINE__);
         return -ENOMEM;
     }
 
     for (i = 0; i < max_mpt_cmd; i++) {
         fusion->cmd_list[i] = kzalloc(sizeof(struct megasas_cmd_fusion),
                           GFP_KERNEL);
         if (!fusion->cmd_list[i]) {
             for (j = 0; j < i; j++)
                 kfree(fusion->cmd_list[j]);
             kfree(fusion->cmd_list);
             dev_err(&instance->pdev->dev,
                 "Failed from %s %d\n",  __func__, __LINE__);
             return -ENOMEM;
         }
     }
 
     return 0;
 }
 
 static int
 megasas_alloc_request_fusion(struct megasas_instance *instance)
 {
     struct fusion_context *fusion;
 
     fusion = instance->ctrl_context;
 
 retry_alloc:
     fusion->io_request_frames_pool =
             dma_pool_create("mr_ioreq", &instance->pdev->dev,
                 fusion->io_frames_alloc_sz, 16, 0);
 
     if (!fusion->io_request_frames_pool) {
         dev_err(&instance->pdev->dev,
             "Failed from %s %d\n",  __func__, __LINE__);
         return -ENOMEM;
     }
 
     fusion->io_request_frames =
             dma_pool_alloc(fusion->io_request_frames_pool,
                 GFP_KERNEL | __GFP_NOWARN,
                 &fusion->io_request_frames_phys);
     if (!fusion->io_request_frames) {
         if (instance->max_fw_cmds >= (MEGASAS_REDUCE_QD_COUNT * 2)) {
             instance->max_fw_cmds -= MEGASAS_REDUCE_QD_COUNT;
             dma_pool_destroy(fusion->io_request_frames_pool);
             megasas_configure_queue_sizes(instance);
             goto retry_alloc;
         } else {
             dev_err(&instance->pdev->dev,
                 "Failed from %s %d\n",  __func__, __LINE__);
             return -ENOMEM;
         }
     }
 
     if (!megasas_check_same_4gb_region(instance,
                        fusion->io_request_frames_phys,
                        fusion->io_frames_alloc_sz)) {
         dma_pool_free(fusion->io_request_frames_pool,
                   fusion->io_request_frames,
                   fusion->io_request_frames_phys);
         fusion->io_request_frames = NULL;
         dma_pool_destroy(fusion->io_request_frames_pool);
 
         fusion->io_request_frames_pool =
             dma_pool_create("mr_ioreq_align",
                     &instance->pdev->dev,
                     fusion->io_frames_alloc_sz,
                     roundup_pow_of_two(fusion->io_frames_alloc_sz),
                     0);
 
         if (!fusion->io_request_frames_pool) {
             dev_err(&instance->pdev->dev,
                 "Failed from %s %d\n",  __func__, __LINE__);
             return -ENOMEM;
         }
 
         fusion->io_request_frames =
             dma_pool_alloc(fusion->io_request_frames_pool,
                        GFP_KERNEL | __GFP_NOWARN,
                        &fusion->io_request_frames_phys);
 
         if (!fusion->io_request_frames) {
             dev_err(&instance->pdev->dev,
                 "Failed from %s %d\n",  __func__, __LINE__);
             return -ENOMEM;
         }
     }
 
     fusion->req_frames_desc =
         dma_alloc_coherent(&instance->pdev->dev,
                    fusion->request_alloc_sz,
                    &fusion->req_frames_desc_phys, GFP_KERNEL);
     if (!fusion->req_frames_desc) {
         dev_err(&instance->pdev->dev,
             "Failed from %s %d\n",  __func__, __LINE__);
         return -ENOMEM;
     }
 
     return 0;
 }
 
 static int
 megasas_alloc_reply_fusion(struct megasas_instance *instance)
 {
     int i, count;
     struct fusion_context *fusion;
     union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
     fusion = instance->ctrl_context;
 
     count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
     count += instance->iopoll_q_count;
 
     fusion->reply_frames_desc_pool =
             dma_pool_create("mr_reply", &instance->pdev->dev,
                 fusion->reply_alloc_sz * count, 16, 0);
 
     if (!fusion->reply_frames_desc_pool) {
         dev_err(&instance->pdev->dev,
             "Failed from %s %d\n",  __func__, __LINE__);
         return -ENOMEM;
     }
 
     fusion->reply_frames_desc[0] =
         dma_pool_alloc(fusion->reply_frames_desc_pool,
             GFP_KERNEL, &fusion->reply_frames_desc_phys[0]);
     if (!fusion->reply_frames_desc[0]) {
         dev_err(&instance->pdev->dev,
             "Failed from %s %d\n",  __func__, __LINE__);
         return -ENOMEM;
     }
 
     if (!megasas_check_same_4gb_region(instance,
                        fusion->reply_frames_desc_phys[0],
                        (fusion->reply_alloc_sz * count))) {
         dma_pool_free(fusion->reply_frames_desc_pool,
                   fusion->reply_frames_desc[0],
                   fusion->reply_frames_desc_phys[0]);
         fusion->reply_frames_desc[0] = NULL;
         dma_pool_destroy(fusion->reply_frames_desc_pool);
 
         fusion->reply_frames_desc_pool =
             dma_pool_create("mr_reply_align",
                     &instance->pdev->dev,
                     fusion->reply_alloc_sz * count,
                     roundup_pow_of_two(fusion->reply_alloc_sz * count),
                     0);
 
         if (!fusion->reply_frames_desc_pool) {
             dev_err(&instance->pdev->dev,
                 "Failed from %s %d\n",  __func__, __LINE__);
             return -ENOMEM;
         }
 
         fusion->reply_frames_desc[0] =
             dma_pool_alloc(fusion->reply_frames_desc_pool,
                        GFP_KERNEL,
                        &fusion->reply_frames_desc_phys[0]);
 
         if (!fusion->reply_frames_desc[0]) {
             dev_err(&instance->pdev->dev,
                 "Failed from %s %d\n",  __func__, __LINE__);
             return -ENOMEM;
         }
     }
 
     reply_desc = fusion->reply_frames_desc[0];
     for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
         reply_desc->Words = cpu_to_le64(ULLONG_MAX);
 
     /* This is not a rdpq mode, but driver still populate
      * reply_frame_desc array to use same msix index in ISR path.
      */
     for (i = 0; i < (count - 1); i++)
         fusion->reply_frames_desc[i + 1] =
             fusion->reply_frames_desc[i] +
             (fusion->reply_alloc_sz)/sizeof(union MPI2_REPLY_DESCRIPTORS_UNION);
 
     return 0;
 }
 
 static int
 megasas_alloc_rdpq_fusion(struct megasas_instance *instance)
 {
     int i, j, k, msix_count;
     struct fusion_context *fusion;
     union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
     union MPI2_REPLY_DESCRIPTORS_UNION *rdpq_chunk_virt[RDPQ_MAX_CHUNK_COUNT];
     dma_addr_t rdpq_chunk_phys[RDPQ_MAX_CHUNK_COUNT];
     u8 dma_alloc_count, abs_index;
     u32 chunk_size, array_size, offset;
 
     fusion = instance->ctrl_context;
     chunk_size = fusion->reply_alloc_sz * RDPQ_MAX_INDEX_IN_ONE_CHUNK;
     array_size = sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) *
              MAX_MSIX_QUEUES_FUSION;
 
     fusion->rdpq_virt = dma_alloc_coherent(&instance->pdev->dev,
                            array_size, &fusion->rdpq_phys,
                            GFP_KERNEL);
     if (!fusion->rdpq_virt) {
         dev_err(&instance->pdev->dev,
             "Failed from %s %d\n",  __func__, __LINE__);
         return -ENOMEM;
     }
 
     msix_count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
     msix_count += instance->iopoll_q_count;
 
     fusion->reply_frames_desc_pool = dma_pool_create("mr_rdpq",
                              &instance->pdev->dev,
                              chunk_size, 16, 0);
     fusion->reply_frames_desc_pool_align =
                 dma_pool_create("mr_rdpq_align",
                         &instance->pdev->dev,
                         chunk_size,
                         roundup_pow_of_two(chunk_size),
                         0);
 
     if (!fusion->reply_frames_desc_pool ||
         !fusion->reply_frames_desc_pool_align) {
         dev_err(&instance->pdev->dev,
             "Failed from %s %d\n",  __func__, __LINE__);
         return -ENOMEM;
     }
 
 /*
  * For INVADER_SERIES each set of 8 reply queues(0-7, 8-15, ..) and
  * VENTURA_SERIES each set of 16 reply queues(0-15, 16-31, ..) should be
  * within 4GB boundary and also reply queues in a set must have same
  * upper 32-bits in their memory address. so here driver is allocating the
  * DMA'able memory for reply queues according. Driver uses limitation of
  * VENTURA_SERIES to manage INVADER_SERIES as well.
  */
     dma_alloc_count = DIV_ROUND_UP(msix_count, RDPQ_MAX_INDEX_IN_ONE_CHUNK);
 
     for (i = 0; i < dma_alloc_count; i++) {
         rdpq_chunk_virt[i] =
             dma_pool_alloc(fusion->reply_frames_desc_pool,
                        GFP_KERNEL, &rdpq_chunk_phys[i]);
         if (!rdpq_chunk_virt[i]) {
             dev_err(&instance->pdev->dev,
                 "Failed from %s %d\n",  __func__, __LINE__);
             return -ENOMEM;
         }
         /* reply desc pool requires to be in same 4 gb region.
          * Below function will check this.
          * In case of failure, new pci pool will be created with updated
          * alignment.
          * For RDPQ buffers, driver always allocate two separate pci pool.
          * Alignment will be used such a way that next allocation if
          * success, will always meet same 4gb region requirement.
          * rdpq_tracker keep track of each buffer's physical,
          * virtual address and pci pool descriptor. It will help driver
          * while freeing the resources.
          *
          */
         if (!megasas_check_same_4gb_region(instance, rdpq_chunk_phys[i],
                            chunk_size)) {
             dma_pool_free(fusion->reply_frames_desc_pool,
                       rdpq_chunk_virt[i],
                       rdpq_chunk_phys[i]);
 
             rdpq_chunk_virt[i] =
                 dma_pool_alloc(fusion->reply_frames_desc_pool_align,
                            GFP_KERNEL, &rdpq_chunk_phys[i]);
             if (!rdpq_chunk_virt[i]) {
                 dev_err(&instance->pdev->dev,
                     "Failed from %s %d\n",
                     __func__, __LINE__);
                 return -ENOMEM;
             }
             fusion->rdpq_tracker[i].dma_pool_ptr =
                     fusion->reply_frames_desc_pool_align;
         } else {
             fusion->rdpq_tracker[i].dma_pool_ptr =
                     fusion->reply_frames_desc_pool;
         }
 
         fusion->rdpq_tracker[i].pool_entry_phys = rdpq_chunk_phys[i];
         fusion->rdpq_tracker[i].pool_entry_virt = rdpq_chunk_virt[i];
     }
 
     for (k = 0; k < dma_alloc_count; k++) {
         for (i = 0; i < RDPQ_MAX_INDEX_IN_ONE_CHUNK; i++) {
             abs_index = (k * RDPQ_MAX_INDEX_IN_ONE_CHUNK) + i;
 
             if (abs_index == msix_count)
                 break;
             offset = fusion->reply_alloc_sz * i;
             fusion->rdpq_virt[abs_index].RDPQBaseAddress =
                     cpu_to_le64(rdpq_chunk_phys[k] + offset);
             fusion->reply_frames_desc_phys[abs_index] =
                     rdpq_chunk_phys[k] + offset;
             fusion->reply_frames_desc[abs_index] =
                     (union MPI2_REPLY_DESCRIPTORS_UNION *)((u8 *)rdpq_chunk_virt[k] + offset);
 
             reply_desc = fusion->reply_frames_desc[abs_index];
             for (j = 0; j < fusion->reply_q_depth; j++, reply_desc++)
                 reply_desc->Words = ULLONG_MAX;
         }
     }
 
     return 0;
 }
 
 static void
 megasas_free_rdpq_fusion(struct megasas_instance *instance) {
 
     int i;
     struct fusion_context *fusion;
 
     fusion = instance->ctrl_context;
 
     for (i = 0; i < RDPQ_MAX_CHUNK_COUNT; i++) {
         if (fusion->rdpq_tracker[i].pool_entry_virt)
             dma_pool_free(fusion->rdpq_tracker[i].dma_pool_ptr,
                       fusion->rdpq_tracker[i].pool_entry_virt,
                       fusion->rdpq_tracker[i].pool_entry_phys);
 
     }
 
     dma_pool_destroy(fusion->reply_frames_desc_pool);
     dma_pool_destroy(fusion->reply_frames_desc_pool_align);
 
     if (fusion->rdpq_virt)
         dma_free_coherent(&instance->pdev->dev,
             sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) * MAX_MSIX_QUEUES_FUSION,
             fusion->rdpq_virt, fusion->rdpq_phys);
 }
 
 static void
 megasas_free_reply_fusion(struct megasas_instance *instance) {
 
     struct fusion_context *fusion;
 
     fusion = instance->ctrl_context;
 
     if (fusion->reply_frames_desc[0])
         dma_pool_free(fusion->reply_frames_desc_pool,
             fusion->reply_frames_desc[0],
             fusion->reply_frames_desc_phys[0]);
 
     dma_pool_destroy(fusion->reply_frames_desc_pool);
 
 }
 
 
 /**
  * megasas_alloc_cmds_fusion -  Allocates the command packets
  * @instance:       Adapter soft state
  *
  *
  * Each frame has a 32-bit field called context. This context is used to get
  * back the megasas_cmd_fusion from the frame when a frame gets completed
  * In this driver, the 32 bit values are the indices into an array cmd_list.
  * This array is used only to look up the megasas_cmd_fusion given the context.
  * The free commands themselves are maintained in a linked list called cmd_pool.
  *
  * cmds are formed in the io_request and sg_frame members of the
  * megasas_cmd_fusion. The context field is used to get a request descriptor
  * and is used as SMID of the cmd.
  * SMID value range is from 1 to max_fw_cmds.
  */
 static int
 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 {
     int i;
     struct fusion_context *fusion;
     struct megasas_cmd_fusion *cmd;
     u32 offset;
     dma_addr_t io_req_base_phys;
     u8 *io_req_base;
 
 
     fusion = instance->ctrl_context;
 
     if (megasas_alloc_request_fusion(instance))
         goto fail_exit;
 
     if (instance->is_rdpq) {
         if (megasas_alloc_rdpq_fusion(instance))
             goto fail_exit;
     } else
         if (megasas_alloc_reply_fusion(instance))
             goto fail_exit;
 
     if (megasas_alloc_cmdlist_fusion(instance))
         goto fail_exit;
 
     /* The first 256 bytes (SMID 0) is not used. Don't add to the cmd list */
     io_req_base = fusion->io_request_frames + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
     io_req_base_phys = fusion->io_request_frames_phys + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 
     /*
      * Add all the commands to command pool (fusion->cmd_pool)
      */
 
     /* SMID 0 is reserved. Set SMID/index from 1 */
     for (i = 0; i < instance->max_mpt_cmds; i++) {
         cmd = fusion->cmd_list[i];
         offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
         memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
         cmd->index = i + 1;
         cmd->scmd = NULL;
         cmd->sync_cmd_idx =
         (i >= instance->max_scsi_cmds && i < instance->max_fw_cmds) ?
                 (i - instance->max_scsi_cmds) :
                 (u32)ULONG_MAX; /* Set to Invalid */
         cmd->instance = instance;
         cmd->io_request =
             (struct MPI2_RAID_SCSI_IO_REQUEST *)
           (io_req_base + offset);
         memset(cmd->io_request, 0,
                sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
         cmd->io_request_phys_addr = io_req_base_phys + offset;
         cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
     }
 
     if (megasas_create_sg_sense_fusion(instance))
         goto fail_exit;
 
     return 0;
 
 fail_exit:
     megasas_free_cmds_fusion(instance);
     return -ENOMEM;
 }
 
 /**
  * wait_and_poll -  Issues a polling command
  * @instance:           Adapter soft state
  * @cmd:            Command packet to be issued
  * @seconds:            Maximum poll time
  *
  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
  */
 int
 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
     int seconds)
 {
     int i;
     struct megasas_header *frame_hdr = &cmd->frame->hdr;
     u32 status_reg;
 
     u32 msecs = seconds * 1000;
 
     /*
      * Wait for cmd_status to change
      */
     for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
         rmb();
         msleep(20);
         if (!(i % 5000)) {
             status_reg = instance->instancet->read_fw_status_reg(instance)
                     & MFI_STATE_MASK;
             if (status_reg == MFI_STATE_FAULT)
                 break;
         }
     }
 
     if (frame_hdr->cmd_status == MFI_STAT_INVALID_STATUS)
         return DCMD_TIMEOUT;
     else if (frame_hdr->cmd_status == MFI_STAT_OK)
         return DCMD_SUCCESS;
     else
         return DCMD_FAILED;
 }
 
 /**
  * megasas_ioc_init_fusion -    Initializes the FW
  * @instance:       Adapter soft state
  *
  * Issues the IOC Init cmd
  */
 int
 megasas_ioc_init_fusion(struct megasas_instance *instance)
 {
     struct megasas_init_frame *init_frame;
     struct MPI2_IOC_INIT_REQUEST *IOCInitMessage = NULL;
     dma_addr_t  ioc_init_handle;
     struct megasas_cmd *cmd;
     u8 ret, cur_rdpq_mode;
     struct fusion_context *fusion;
     union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
     int i;
     struct megasas_header *frame_hdr;
     const char *sys_info;
     MFI_CAPABILITIES *drv_ops;
     u32 scratch_pad_1;
     ktime_t time;
     bool cur_fw_64bit_dma_capable;
     bool cur_intr_coalescing;
 
     fusion = instance->ctrl_context;
 
     ioc_init_handle = fusion->ioc_init_request_phys;
     IOCInitMessage = fusion->ioc_init_request;
 
     cmd = fusion->ioc_init_cmd;
 
     scratch_pad_1 = megasas_readl
         (instance, &instance->reg_set->outbound_scratch_pad_1);
 
     cur_rdpq_mode = (scratch_pad_1 & MR_RDPQ_MODE_OFFSET) ? 1 : 0;
 
     if (instance->adapter_type == INVADER_SERIES) {
         cur_fw_64bit_dma_capable =
             (scratch_pad_1 & MR_CAN_HANDLE_64_BIT_DMA_OFFSET) ? true : false;
 
         if (instance->consistent_mask_64bit && !cur_fw_64bit_dma_capable) {
             dev_err(&instance->pdev->dev, "Driver was operating on 64bit "
                 "DMA mask, but upcoming FW does not support 64bit DMA mask\n");
             megaraid_sas_kill_hba(instance);
             ret = 1;
             goto fail_fw_init;
         }
     }
 
     if (instance->is_rdpq && !cur_rdpq_mode) {
         dev_err(&instance->pdev->dev, "Firmware downgrade *NOT SUPPORTED*"
             " from RDPQ mode to non RDPQ mode\n");
         ret = 1;
         goto fail_fw_init;
     }
 
     cur_intr_coalescing = (scratch_pad_1 & MR_INTR_COALESCING_SUPPORT_OFFSET) ?
                             true : false;
 
     if ((instance->low_latency_index_start ==
         MR_HIGH_IOPS_QUEUE_COUNT) && cur_intr_coalescing)
         instance->perf_mode = MR_BALANCED_PERF_MODE;
 
     dev_info(&instance->pdev->dev, "Performance mode :%s (latency index = %d)\n",
         MEGASAS_PERF_MODE_2STR(instance->perf_mode),
         instance->low_latency_index_start);
 
     instance->fw_sync_cache_support = (scratch_pad_1 &
         MR_CAN_HANDLE_SYNC_CACHE_OFFSET) ? 1 : 0;
     dev_info(&instance->pdev->dev, "FW supports sync cache\t: %s\n",
          instance->fw_sync_cache_support ? "Yes" : "No");
 
     memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
 
     IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
     IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
     IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION);
     IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
     IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4);
 
     IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth);
     IOCInitMessage->ReplyDescriptorPostQueueAddress = instance->is_rdpq ?
             cpu_to_le64(fusion->rdpq_phys) :
             cpu_to_le64(fusion->reply_frames_desc_phys[0]);
     IOCInitMessage->MsgFlags = instance->is_rdpq ?
             MPI2_IOCINIT_MSGFLAG_RDPQ_ARRAY_MODE : 0;
     IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys);
     IOCInitMessage->SenseBufferAddressHigh = cpu_to_le32(upper_32_bits(fusion->sense_phys_addr));
     IOCInitMessage->HostMSIxVectors = instance->msix_vectors + instance->iopoll_q_count;
     IOCInitMessage->HostPageSize = MR_DEFAULT_NVME_PAGE_SHIFT;
 
     time = ktime_get_real();
     /* Convert to milliseconds as per FW requirement */
     IOCInitMessage->TimeStamp = cpu_to_le64(ktime_to_ms(time));
 
     init_frame = (struct megasas_init_frame *)cmd->frame;
     memset(init_frame, 0, IOC_INIT_FRAME_SIZE);
 
     frame_hdr = &cmd->frame->hdr;
     frame_hdr->cmd_status = 0xFF;
     frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
 
     init_frame->cmd = MFI_CMD_INIT;
     init_frame->cmd_status = 0xFF;
 
     drv_ops = (MFI_CAPABILITIES *) &(init_frame->driver_operations);
 
     /* driver support Extended MSIX */
     if (instance->adapter_type >= INVADER_SERIES)
         drv_ops->mfi_capabilities.support_additional_msix = 1;
     /* driver supports HA / Remote LUN over Fast Path interface */
     drv_ops->mfi_capabilities.support_fp_remote_lun = 1;
 
     drv_ops->mfi_capabilities.support_max_255lds = 1;
     drv_ops->mfi_capabilities.support_ndrive_r1_lb = 1;
     drv_ops->mfi_capabilities.security_protocol_cmds_fw = 1;
 
     if (instance->max_chain_frame_sz > MEGASAS_CHAIN_FRAME_SZ_MIN)
         drv_ops->mfi_capabilities.support_ext_io_size = 1;
 
     drv_ops->mfi_capabilities.support_fp_rlbypass = 1;
     if (!dual_qdepth_disable)
         drv_ops->mfi_capabilities.support_ext_queue_depth = 1;
 
     drv_ops->mfi_capabilities.support_qd_throttling = 1;
     drv_ops->mfi_capabilities.support_pd_map_target_id = 1;
     drv_ops->mfi_capabilities.support_nvme_passthru = 1;
     drv_ops->mfi_capabilities.support_fw_exposed_dev_list = 1;
 
     if (instance->consistent_mask_64bit)
         drv_ops->mfi_capabilities.support_64bit_mode = 1;
 
     /* Convert capability to LE32 */
     cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
 
     sys_info = dmi_get_system_info(DMI_PRODUCT_UUID);
     if (instance->system_info_buf && sys_info) {
         memcpy(instance->system_info_buf->systemId, sys_info,
             strlen(sys_info) > 64 ? 64 : strlen(sys_info));
         instance->system_info_buf->systemIdLength =
             strlen(sys_info) > 64 ? 64 : strlen(sys_info);
         init_frame->system_info_lo = cpu_to_le32(lower_32_bits(instance->system_info_h));
         init_frame->system_info_hi = cpu_to_le32(upper_32_bits(instance->system_info_h));
     }
 
     init_frame->queue_info_new_phys_addr_hi =
         cpu_to_le32(upper_32_bits(ioc_init_handle));
     init_frame->queue_info_new_phys_addr_lo =
         cpu_to_le32(lower_32_bits(ioc_init_handle));
     init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
 
     /*
      * Each bit in replyqueue_mask represents one group of MSI-x vectors
      * (each group has 8 vectors)
      */
     switch (instance->perf_mode) {
     case MR_BALANCED_PERF_MODE:
         init_frame->replyqueue_mask =
                cpu_to_le16(~(~0 << instance->low_latency_index_start/8));
         break;
     case MR_IOPS_PERF_MODE:
         init_frame->replyqueue_mask =
                cpu_to_le16(~(~0 << instance->msix_vectors/8));
         break;
     }
 
 
     req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr));
     req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr));
     req_desc.MFAIo.RequestFlags =
         (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 
     /*
      * disable the intr before firing the init frame
      */
     instance->instancet->disable_intr(instance);
 
     for (i = 0; i < (10 * 1000); i += 20) {
         if (megasas_readl(instance, &instance->reg_set->doorbell) & 1)
             msleep(20);
         else
             break;
     }
 
     /* For AERO also, IOC_INIT requires 64 bit descriptor write */
     megasas_write_64bit_req_desc(instance, &req_desc);
 
     wait_and_poll(instance, cmd, MFI_IO_TIMEOUT_SECS);
 
     frame_hdr = &cmd->frame->hdr;
     if (frame_hdr->cmd_status != 0) {
         ret = 1;
         goto fail_fw_init;
     }
 
     if (instance->adapter_type >= AERO_SERIES) {
         scratch_pad_1 = megasas_readl
             (instance, &instance->reg_set->outbound_scratch_pad_1);
 
         instance->atomic_desc_support =
             (scratch_pad_1 & MR_ATOMIC_DESCRIPTOR_SUPPORT_OFFSET) ? 1 : 0;
 
         dev_info(&instance->pdev->dev, "FW supports atomic descriptor\t: %s\n",
             instance->atomic_desc_support ? "Yes" : "No");
     }
 
     return 0;
 
 fail_fw_init:
     dev_err(&instance->pdev->dev,
         "Init cmd return status FAILED for SCSI host %d\n",
         instance->host->host_no);
 
     return ret;
 }
 
 /**
  * megasas_sync_pd_seq_num -    JBOD SEQ MAP
  * @instance:       Adapter soft state
  * @pend:       set to 1, if it is pended jbod map.
  *
  * Issue Jbod map to the firmware. If it is pended command,
  * issue command and return. If it is first instance of jbod map
  * issue and receive command.
  */
 int
 megasas_sync_pd_seq_num(struct megasas_instance *instance, bool pend) {
     int ret = 0;
     size_t pd_seq_map_sz;
     struct megasas_cmd *cmd;
     struct megasas_dcmd_frame *dcmd;
     struct fusion_context *fusion = instance->ctrl_context;
     struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
     dma_addr_t pd_seq_h;
 
     pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id & 1)];
     pd_seq_h = fusion->pd_seq_phys[(instance->pd_seq_map_id & 1)];
     pd_seq_map_sz = struct_size(pd_sync, seq, MAX_PHYSICAL_DEVICES - 1);
 
     cmd = megasas_get_cmd(instance);
     if (!cmd) {
         dev_err(&instance->pdev->dev,
             "Could not get mfi cmd. Fail from %s %d\n",
             __func__, __LINE__);
         return -ENOMEM;
     }
 
     dcmd = &cmd->frame->dcmd;
 
     memset(pd_sync, 0, pd_seq_map_sz);
     memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 
     if (pend) {
         dcmd->mbox.b[0] = MEGASAS_DCMD_MBOX_PEND_FLAG;
         dcmd->flags = MFI_FRAME_DIR_WRITE;
         instance->jbod_seq_cmd = cmd;
     } else {
         dcmd->flags = MFI_FRAME_DIR_READ;
     }
 
     dcmd->cmd = MFI_CMD_DCMD;
     dcmd->cmd_status = 0xFF;
     dcmd->sge_count = 1;
     dcmd->timeout = 0;
     dcmd->pad_0 = 0;
     dcmd->data_xfer_len = cpu_to_le32(pd_seq_map_sz);
     dcmd->opcode = cpu_to_le32(MR_DCMD_SYSTEM_PD_MAP_GET_INFO);
 
     megasas_set_dma_settings(instance, dcmd, pd_seq_h, pd_seq_map_sz);
 
     if (pend) {
         instance->instancet->issue_dcmd(instance, cmd);
         return 0;
     }
 
     /* Below code is only for non pended DCMD */
     if (!instance->mask_interrupts)
         ret = megasas_issue_blocked_cmd(instance, cmd,
             MFI_IO_TIMEOUT_SECS);
     else
         ret = megasas_issue_polled(instance, cmd);
 
     if (le32_to_cpu(pd_sync->count) > MAX_PHYSICAL_DEVICES) {
         dev_warn(&instance->pdev->dev,
             "driver supports max %d JBOD, but FW reports %d\n",
             MAX_PHYSICAL_DEVICES, le32_to_cpu(pd_sync->count));
         ret = -EINVAL;
     }
 
     if (ret == DCMD_TIMEOUT)
         dev_warn(&instance->pdev->dev,
              "%s DCMD timed out, continue without JBOD sequence map\n",
              __func__);
 
     if (ret == DCMD_SUCCESS)
         instance->pd_seq_map_id++;
 
     megasas_return_cmd(instance, cmd);
     return ret;
 }
 
 /*
  * megasas_get_ld_map_info -    Returns FW's ld_map structure
  * @instance:               Adapter soft state
  * @pend:               Pend the command or not
  * Issues an internal command (DCMD) to get the FW's controller PD
  * list structure.  This information is mainly used to find out SYSTEM
  * supported by the FW.
  * dcmd.mbox value setting for MR_DCMD_LD_MAP_GET_INFO
  * dcmd.mbox.b[0]   - number of LDs being sync'd
  * dcmd.mbox.b[1]   - 0 - complete command immediately.
  *          - 1 - pend till config change
  * dcmd.mbox.b[2]   - 0 - supports max 64 lds and uses legacy MR_FW_RAID_MAP
  *          - 1 - supports max MAX_LOGICAL_DRIVES_EXT lds and
  *              uses extended struct MR_FW_RAID_MAP_EXT
  */
 static int
 megasas_get_ld_map_info(struct megasas_instance *instance)
 {
     int ret = 0;
     struct megasas_cmd *cmd;
     struct megasas_dcmd_frame *dcmd;
     void *ci;
     dma_addr_t ci_h = 0;
     u32 size_map_info;
     struct fusion_context *fusion;
 
     cmd = megasas_get_cmd(instance);
 
     if (!cmd) {
         dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for map info\n");
         return -ENOMEM;
     }
 
     fusion = instance->ctrl_context;
 
     if (!fusion) {
         megasas_return_cmd(instance, cmd);
         return -ENXIO;
     }
 
     dcmd = &cmd->frame->dcmd;
 
     size_map_info = fusion->current_map_sz;
 
     ci = (void *) fusion->ld_map[(instance->map_id & 1)];
     ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
 
     if (!ci) {
         dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to alloc mem for ld_map_info\n");
         megasas_return_cmd(instance, cmd);
         return -ENOMEM;
     }
 
     memset(ci, 0, fusion->max_map_sz);
     memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
     dcmd->cmd = MFI_CMD_DCMD;
     dcmd->cmd_status = 0xFF;
     dcmd->sge_count = 1;
     dcmd->flags = MFI_FRAME_DIR_READ;
     dcmd->timeout = 0;
     dcmd->pad_0 = 0;
     dcmd->data_xfer_len = cpu_to_le32(size_map_info);
     dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
 
     megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
 
     if (!instance->mask_interrupts)
         ret = megasas_issue_blocked_cmd(instance, cmd,
             MFI_IO_TIMEOUT_SECS);
     else
         ret = megasas_issue_polled(instance, cmd);
 
     if (ret == DCMD_TIMEOUT)
         dev_warn(&instance->pdev->dev,
              "%s DCMD timed out, RAID map is disabled\n",
              __func__);
 
     megasas_return_cmd(instance, cmd);
 
     return ret;
 }
 
 u8
 megasas_get_map_info(struct megasas_instance *instance)
 {
     struct fusion_context *fusion = instance->ctrl_context;
 
     fusion->fast_path_io = 0;
     if (!megasas_get_ld_map_info(instance)) {
         if (MR_ValidateMapInfo(instance, instance->map_id)) {
             fusion->fast_path_io = 1;
             return 0;
         }
     }
     return 1;
 }
 
 /*
  * megasas_sync_map_info -  Returns FW's ld_map structure
  * @instance:               Adapter soft state
  *
  * Issues an internal command (DCMD) to get the FW's controller PD
  * list structure.  This information is mainly used to find out SYSTEM
  * supported by the FW.
  */
 int
 megasas_sync_map_info(struct megasas_instance *instance)
 {
     int i;
     struct megasas_cmd *cmd;
     struct megasas_dcmd_frame *dcmd;
     u16 num_lds;
     struct fusion_context *fusion;
     struct MR_LD_TARGET_SYNC *ci = NULL;
     struct MR_DRV_RAID_MAP_ALL *map;
     struct MR_LD_RAID  *raid;
     struct MR_LD_TARGET_SYNC *ld_sync;
     dma_addr_t ci_h = 0;
     u32 size_map_info;
 
     cmd = megasas_get_cmd(instance);
 
     if (!cmd) {
         dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for sync info\n");
         return -ENOMEM;
     }
 
     fusion = instance->ctrl_context;
 
     if (!fusion) {
         megasas_return_cmd(instance, cmd);
         return 1;
     }
 
     map = fusion->ld_drv_map[instance->map_id & 1];
 
     num_lds = le16_to_cpu(map->raidMap.ldCount);
 
     dcmd = &cmd->frame->dcmd;
 
     memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 
     ci = (struct MR_LD_TARGET_SYNC *)
       fusion->ld_map[(instance->map_id - 1) & 1];
     memset(ci, 0, fusion->max_map_sz);
 
     ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
 
     ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
 
     for (i = 0; i < num_lds; i++, ld_sync++) {
         raid = MR_LdRaidGet(i, map);
         ld_sync->targetId = MR_GetLDTgtId(i, map);
         ld_sync->seqNum = raid->seqNum;
     }
 
     size_map_info = fusion->current_map_sz;
 
     dcmd->cmd = MFI_CMD_DCMD;
     dcmd->cmd_status = 0xFF;
     dcmd->sge_count = 1;
     dcmd->flags = MFI_FRAME_DIR_WRITE;
     dcmd->timeout = 0;
     dcmd->pad_0 = 0;
     dcmd->data_xfer_len = cpu_to_le32(size_map_info);
     dcmd->mbox.b[0] = num_lds;
     dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
     dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
 
     megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
 
     instance->map_update_cmd = cmd;
 
     instance->instancet->issue_dcmd(instance, cmd);
 
     return 0;
 }
 
 /*
  * meagasas_display_intel_branding - Display branding string
  * @instance: per adapter object
  *
  * Return nothing.
  */
 static void
 megasas_display_intel_branding(struct megasas_instance *instance)
 {
     if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL)
         return;
 
     switch (instance->pdev->device) {
     case PCI_DEVICE_ID_LSI_INVADER:
         switch (instance->pdev->subsystem_device) {
         case MEGARAID_INTEL_RS3DC080_SSDID:
             dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
                 instance->host->host_no,
                 MEGARAID_INTEL_RS3DC080_BRANDING);
             break;
         case MEGARAID_INTEL_RS3DC040_SSDID:
             dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
                 instance->host->host_no,
                 MEGARAID_INTEL_RS3DC040_BRANDING);
             break;
         case MEGARAID_INTEL_RS3SC008_SSDID:
             dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
                 instance->host->host_no,
                 MEGARAID_INTEL_RS3SC008_BRANDING);
             break;
         case MEGARAID_INTEL_RS3MC044_SSDID:
             dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
                 instance->host->host_no,
                 MEGARAID_INTEL_RS3MC044_BRANDING);
             break;
         default:
             break;
         }
         break;
     case PCI_DEVICE_ID_LSI_FURY:
         switch (instance->pdev->subsystem_device) {
         case MEGARAID_INTEL_RS3WC080_SSDID:
             dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
                 instance->host->host_no,
                 MEGARAID_INTEL_RS3WC080_BRANDING);
             break;
         case MEGARAID_INTEL_RS3WC040_SSDID:
             dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
                 instance->host->host_no,
                 MEGARAID_INTEL_RS3WC040_BRANDING);
             break;
         default:
             break;
         }
         break;
     case PCI_DEVICE_ID_LSI_CUTLASS_52:
     case PCI_DEVICE_ID_LSI_CUTLASS_53:
         switch (instance->pdev->subsystem_device) {
         case MEGARAID_INTEL_RMS3BC160_SSDID:
             dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
                 instance->host->host_no,
                 MEGARAID_INTEL_RMS3BC160_BRANDING);
             break;
         default:
             break;
         }
         break;
     default:
         break;
     }
 }
 
 /**
  * megasas_allocate_raid_maps - Allocate memory for RAID maps
  * @instance:               Adapter soft state
  *
  * return:              if success: return 0
  *                  failed:  return -ENOMEM
  */
 static inline int megasas_allocate_raid_maps(struct megasas_instance *instance)
 {
     struct fusion_context *fusion;
     int i = 0;
 
     fusion = instance->ctrl_context;
 
     fusion->drv_map_pages = get_order(fusion->drv_map_sz);
 
     for (i = 0; i < 2; i++) {
         fusion->ld_map[i] = NULL;
 
         fusion->ld_drv_map[i] = (void *)
             __get_free_pages(__GFP_ZERO | GFP_KERNEL,
                      fusion->drv_map_pages);
 
         if (!fusion->ld_drv_map[i]) {
             fusion->ld_drv_map[i] = vzalloc(fusion->drv_map_sz);
 
             if (!fusion->ld_drv_map[i]) {
                 dev_err(&instance->pdev->dev,
                     "Could not allocate memory for local map"
                     " size requested: %d\n",
                     fusion->drv_map_sz);
                 goto ld_drv_map_alloc_fail;
             }
         }
     }
 
     for (i = 0; i < 2; i++) {
         fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
                                fusion->max_map_sz,
                                &fusion->ld_map_phys[i],
                                GFP_KERNEL);
         if (!fusion->ld_map[i]) {
             dev_err(&instance->pdev->dev,
                 "Could not allocate memory for map info %s:%d\n",
                 __func__, __LINE__);
             goto ld_map_alloc_fail;
         }
     }
 
     return 0;
 
 ld_map_alloc_fail:
     for (i = 0; i < 2; i++) {
         if (fusion->ld_map[i])
             dma_free_coherent(&instance->pdev->dev,
                       fusion->max_map_sz,
                       fusion->ld_map[i],
                       fusion->ld_map_phys[i]);
     }
 
 ld_drv_map_alloc_fail:
     for (i = 0; i < 2; i++) {
         if (fusion->ld_drv_map[i]) {
             if (is_vmalloc_addr(fusion->ld_drv_map[i]))
                 vfree(fusion->ld_drv_map[i]);
             else
                 free_pages((ulong)fusion->ld_drv_map[i],
                        fusion->drv_map_pages);
         }
     }
 
     return -ENOMEM;
 }
 
 /**
  * megasas_configure_queue_sizes -  Calculate size of request desc queue,
  *                  reply desc queue,
  *                  IO request frame queue, set can_queue.
  * @instance:               Adapter soft state
  * @return:             void
  */
 static inline
 void megasas_configure_queue_sizes(struct megasas_instance *instance)
 {
     struct fusion_context *fusion;
     u16 max_cmd;
 
     fusion = instance->ctrl_context;
     max_cmd = instance->max_fw_cmds;
 
     if (instance->adapter_type >= VENTURA_SERIES)
         instance->max_mpt_cmds = instance->max_fw_cmds * RAID_1_PEER_CMDS;
     else
         instance->max_mpt_cmds = instance->max_fw_cmds;
 
     instance->max_scsi_cmds = instance->max_fw_cmds - instance->max_mfi_cmds;
     instance->cur_can_queue = instance->max_scsi_cmds;
     instance->host->can_queue = instance->cur_can_queue;
 
     fusion->reply_q_depth = 2 * ((max_cmd + 1 + 15) / 16) * 16;
 
     fusion->request_alloc_sz = sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *
                       instance->max_mpt_cmds;
     fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION) *
                     (fusion->reply_q_depth);
     fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
         (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
          * (instance->max_mpt_cmds + 1)); /* Extra 1 for SMID 0 */
 }
 
 static int megasas_alloc_ioc_init_frame(struct megasas_instance *instance)
 {
     struct fusion_context *fusion;
     struct megasas_cmd *cmd;
 
     fusion = instance->ctrl_context;
 
     cmd = kzalloc(sizeof(struct megasas_cmd), GFP_KERNEL);
 
     if (!cmd) {
         dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
             __func__, __LINE__);
         return -ENOMEM;
     }
 
     cmd->frame = dma_alloc_coherent(&instance->pdev->dev,
                     IOC_INIT_FRAME_SIZE,
                     &cmd->frame_phys_addr, GFP_KERNEL);
 
     if (!cmd->frame) {
         dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
             __func__, __LINE__);
         kfree(cmd);
         return -ENOMEM;
     }
 
     fusion->ioc_init_cmd = cmd;
     return 0;
 }
 
 /**
  * megasas_free_ioc_init_cmd -  Free IOC INIT command frame
  * @instance:       Adapter soft state
  */
 static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance)
 {
     struct fusion_context *fusion;
 
     fusion = instance->ctrl_context;
 
     if (fusion->ioc_init_cmd && fusion->ioc_init_cmd->frame)
         dma_free_coherent(&instance->pdev->dev,
                   IOC_INIT_FRAME_SIZE,
                   fusion->ioc_init_cmd->frame,
                   fusion->ioc_init_cmd->frame_phys_addr);
 
     kfree(fusion->ioc_init_cmd);
 }
 
 /**
  * megasas_init_adapter_fusion -    Initializes the FW
  * @instance:       Adapter soft state
  *
  * This is the main function for initializing firmware.
  */
 static u32
 megasas_init_adapter_fusion(struct megasas_instance *instance)
 {
     struct fusion_context *fusion;
     u32 scratch_pad_1;
     int i = 0, count;
     u32 status_reg;
 
     fusion = instance->ctrl_context;
 
     megasas_fusion_update_can_queue(instance, PROBE_CONTEXT);
 
     /*
      * Only Driver's internal DCMDs and IOCTL DCMDs needs to have MFI frames
      */
     instance->max_mfi_cmds =
         MEGASAS_FUSION_INTERNAL_CMDS + MEGASAS_FUSION_IOCTL_CMDS;
 
     megasas_configure_queue_sizes(instance);
 
     scratch_pad_1 = megasas_readl(instance,
                       &instance->reg_set->outbound_scratch_pad_1);
     /* If scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK is set,
      * Firmware support extended IO chain frame which is 4 times more than
      * legacy Firmware.
      * Legacy Firmware - Frame size is (8 * 128) = 1K
      * 1M IO Firmware  - Frame size is (8 * 128 * 4)  = 4K
      */
     if (scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK)
         instance->max_chain_frame_sz =
             ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
             MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_1MB_IO;
     else
         instance->max_chain_frame_sz =
             ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
             MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_256K_IO;
 
     if (instance->max_chain_frame_sz < MEGASAS_CHAIN_FRAME_SZ_MIN) {
         dev_warn(&instance->pdev->dev, "frame size %d invalid, fall back to legacy max frame size %d\n",
             instance->max_chain_frame_sz,
             MEGASAS_CHAIN_FRAME_SZ_MIN);
         instance->max_chain_frame_sz = MEGASAS_CHAIN_FRAME_SZ_MIN;
     }
 
     fusion->max_sge_in_main_msg =
         (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
             - offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
 
     fusion->max_sge_in_chain =
         instance->max_chain_frame_sz
             / sizeof(union MPI2_SGE_IO_UNION);
 
     instance->max_num_sge =
         rounddown_pow_of_two(fusion->max_sge_in_main_msg
             + fusion->max_sge_in_chain - 2);
 
     /* Used for pass thru MFI frame (DCMD) */
     fusion->chain_offset_mfi_pthru =
         offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
 
     fusion->chain_offset_io_request =
         (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
          sizeof(union MPI2_SGE_IO_UNION))/16;
 
     count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
     count += instance->iopoll_q_count;
 
     for (i = 0 ; i < count; i++)
         fusion->last_reply_idx[i] = 0;
 
     /*
      * For fusion adapters, 3 commands for IOCTL and 8 commands
      * for driver's internal DCMDs.
      */
     instance->max_scsi_cmds = instance->max_fw_cmds -
                 (MEGASAS_FUSION_INTERNAL_CMDS +
                 MEGASAS_FUSION_IOCTL_CMDS);
     sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS);
 
     for (i = 0; i < MAX_MSIX_QUEUES_FUSION; i++)
         atomic_set(&fusion->busy_mq_poll[i], 0);
 
     if (megasas_alloc_ioc_init_frame(instance))
         return 1;
 
     /*
      * Allocate memory for descriptors
      * Create a pool of commands
      */
     if (megasas_alloc_cmds(instance))
         goto fail_alloc_mfi_cmds;
     if (megasas_alloc_cmds_fusion(instance))
         goto fail_alloc_cmds;
 
     if (megasas_ioc_init_fusion(instance)) {
         status_reg = instance->instancet->read_fw_status_reg(instance);
         if (((status_reg & MFI_STATE_MASK) == MFI_STATE_FAULT) &&
             (status_reg & MFI_RESET_ADAPTER)) {
             /* Do a chip reset and then retry IOC INIT once */
             if (megasas_adp_reset_wait_for_ready
                 (instance, true, 0) == FAILED)
                 goto fail_ioc_init;
 
             if (megasas_ioc_init_fusion(instance))
                 goto fail_ioc_init;
         } else {
             goto fail_ioc_init;
         }
     }
 
     megasas_display_intel_branding(instance);
     if (megasas_get_ctrl_info(instance)) {
         dev_err(&instance->pdev->dev,
             "Could not get controller info. Fail from %s %d\n",
             __func__, __LINE__);
         goto fail_ioc_init;
     }
 
     instance->flag_ieee = 1;
     instance->r1_ldio_hint_default =  MR_R1_LDIO_PIGGYBACK_DEFAULT;
     instance->threshold_reply_count = instance->max_fw_cmds / 4;
     fusion->fast_path_io = 0;
 
     if (megasas_allocate_raid_maps(instance))
         goto fail_ioc_init;
 
     if (!megasas_get_map_info(instance))
         megasas_sync_map_info(instance);
 
     return 0;
 
 fail_ioc_init:
     megasas_free_cmds_fusion(instance);
 fail_alloc_cmds:
     megasas_free_cmds(instance);
 fail_alloc_mfi_cmds:
     megasas_free_ioc_init_cmd(instance);
     return 1;
 }
 
 /**
  * megasas_fault_detect_work    -   Worker function of
  *                  FW fault handling workqueue.
  * @work:   FW fault work struct
  */
 static void
 megasas_fault_detect_work(struct work_struct *work)
 {
     struct megasas_instance *instance =
         container_of(work, struct megasas_instance,
                  fw_fault_work.work);
     u32 fw_state, dma_state, status;
 
     /* Check the fw state */
     fw_state = instance->instancet->read_fw_status_reg(instance) &
             MFI_STATE_MASK;
 
     if (fw_state == MFI_STATE_FAULT) {
         dma_state = instance->instancet->read_fw_status_reg(instance) &
                 MFI_STATE_DMADONE;
         /* Start collecting crash, if DMA bit is done */
         if (instance->crash_dump_drv_support &&
             instance->crash_dump_app_support && dma_state) {
             megasas_fusion_crash_dump(instance);
         } else {
             if (instance->unload == 0) {
                 status = megasas_reset_fusion(instance->host, 0);
                 if (status != SUCCESS) {
                     dev_err(&instance->pdev->dev,
                         "Failed from %s %d, do not re-arm timer\n",
                         __func__, __LINE__);
                     return;
                 }
             }
         }
     }
 
     if (instance->fw_fault_work_q)
         queue_delayed_work(instance->fw_fault_work_q,
             &instance->fw_fault_work,
             msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
 }
 
 int
 megasas_fusion_start_watchdog(struct megasas_instance *instance)
 {
     /* Check if the Fault WQ is already started */
     if (instance->fw_fault_work_q)
         return SUCCESS;
 
     INIT_DELAYED_WORK(&instance->fw_fault_work, megasas_fault_detect_work);
 
     snprintf(instance->fault_handler_work_q_name,
          sizeof(instance->fault_handler_work_q_name),
          "poll_megasas%d_status", instance->host->host_no);
 
     instance->fw_fault_work_q =
         create_singlethread_workqueue(instance->fault_handler_work_q_name);
     if (!instance->fw_fault_work_q) {
         dev_err(&instance->pdev->dev, "Failed from %s %d\n",
             __func__, __LINE__);
         return FAILED;
     }
 
     queue_delayed_work(instance->fw_fault_work_q,
                &instance->fw_fault_work,
                msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
 
     return SUCCESS;
 }
 
 void
 megasas_fusion_stop_watchdog(struct megasas_instance *instance)
 {
     struct workqueue_struct *wq;
 
     if (instance->fw_fault_work_q) {
         wq = instance->fw_fault_work_q;
         instance->fw_fault_work_q = NULL;
         if (!cancel_delayed_work_sync(&instance->fw_fault_work))
             flush_workqueue(wq);
         destroy_workqueue(wq);
     }
 }
 
 /**
  * map_cmd_status - Maps FW cmd status to OS cmd status
  * @fusion:     fusion context
  * @scmd:       Pointer to cmd
  * @status:     status of cmd returned by FW
  * @ext_status:     ext status of cmd returned by FW
  * @data_length:    command data length
  * @sense:      command sense data
  */
 static void
 map_cmd_status(struct fusion_context *fusion,
         struct scsi_cmnd *scmd, u8 status, u8 ext_status,
         u32 data_length, u8 *sense)
 {
     u8 cmd_type;
     int resid;
 
     cmd_type = megasas_cmd_type(scmd);
     switch (status) {
 
     case MFI_STAT_OK:
         scmd->result = DID_OK << 16;
         break;
 
     case MFI_STAT_SCSI_IO_FAILED:
     case MFI_STAT_LD_INIT_IN_PROGRESS:
         scmd->result = (DID_ERROR << 16) | ext_status;
         break;
 
     case MFI_STAT_SCSI_DONE_WITH_ERROR:
 
         scmd->result = (DID_OK << 16) | ext_status;
         if (ext_status == SAM_STAT_CHECK_CONDITION) {
             memcpy(scmd->sense_buffer, sense,
                    SCSI_SENSE_BUFFERSIZE);
         }
 
         /*
          * If the  IO request is partially completed, then MR FW will
          * update "io_request->DataLength" field with actual number of
          * bytes transferred.Driver will set residual bytes count in
          * SCSI command structure.
          */
         resid = (scsi_bufflen(scmd) - data_length);
         scsi_set_resid(scmd, resid);
 
         if (resid &&
             ((cmd_type == READ_WRITE_LDIO) ||
             (cmd_type == READ_WRITE_SYSPDIO)))
             scmd_printk(KERN_INFO, scmd, "BRCM Debug mfi stat 0x%x, data len"
                 " requested/completed 0x%x/0x%x\n",
                 status, scsi_bufflen(scmd), data_length);
         break;
 
     case MFI_STAT_LD_OFFLINE:
     case MFI_STAT_DEVICE_NOT_FOUND:
         scmd->result = DID_BAD_TARGET << 16;
         break;
     case MFI_STAT_CONFIG_SEQ_MISMATCH:
         scmd->result = DID_IMM_RETRY << 16;
         break;
     default:
         scmd->result = DID_ERROR << 16;
         break;
     }
 }
 
 /**
  * megasas_is_prp_possible -
  * Checks if native NVMe PRPs can be built for the IO
  *
  * @instance:       Adapter soft state
  * @scmd:       SCSI command from the mid-layer
  * @sge_count:      scatter gather element count.
  *
  * Returns:     true: PRPs can be built
  *          false: IEEE SGLs needs to be built
  */
 static bool
 megasas_is_prp_possible(struct megasas_instance *instance,
             struct scsi_cmnd *scmd, int sge_count)
 {
     u32 data_length = 0;
     struct scatterlist *sg_scmd;
     bool build_prp = false;
     u32 mr_nvme_pg_size;
 
     mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
                 MR_DEFAULT_NVME_PAGE_SIZE);
     data_length = scsi_bufflen(scmd);
     sg_scmd = scsi_sglist(scmd);
 
     /*
      * NVMe uses one PRP for each page (or part of a page)
      * look at the data length - if 4 pages or less then IEEE is OK
      * if  > 5 pages then we need to build a native SGL
      * if > 4 and <= 5 pages, then check physical address of 1st SG entry
      * if this first size in the page is >= the residual beyond 4 pages
      * then use IEEE, otherwise use native SGL
      */
 
     if (data_length > (mr_nvme_pg_size * 5)) {
         build_prp = true;
     } else if ((data_length > (mr_nvme_pg_size * 4)) &&
             (data_length <= (mr_nvme_pg_size * 5)))  {
         /* check if 1st SG entry size is < residual beyond 4 pages */
         if (sg_dma_len(sg_scmd) < (data_length - (mr_nvme_pg_size * 4)))
             build_prp = true;
     }
 
     return build_prp;
 }
 
 /**
  * megasas_make_prp_nvme -
  * Prepare PRPs(Physical Region Page)- SGLs specific to NVMe drives only
  *
  * @instance:       Adapter soft state
  * @scmd:       SCSI command from the mid-layer
  * @sgl_ptr:        SGL to be filled in
  * @cmd:        Fusion command frame
  * @sge_count:      scatter gather element count.
  *
  * Returns:     true: PRPs are built
  *          false: IEEE SGLs needs to be built
  */
 static bool
 megasas_make_prp_nvme(struct megasas_instance *instance, struct scsi_cmnd *scmd,
               struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
               struct megasas_cmd_fusion *cmd, int sge_count)
 {
     int sge_len, offset, num_prp_in_chain = 0;
     struct MPI25_IEEE_SGE_CHAIN64 *main_chain_element, *ptr_first_sgl;
     u64 *ptr_sgl;
     dma_addr_t ptr_sgl_phys;
     u64 sge_addr;
     u32 page_mask, page_mask_result;
     struct scatterlist *sg_scmd;
     u32 first_prp_len;
     bool build_prp = false;
     int data_len = scsi_bufflen(scmd);
     u32 mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
                     MR_DEFAULT_NVME_PAGE_SIZE);
 
     build_prp = megasas_is_prp_possible(instance, scmd, sge_count);
 
     if (!build_prp)
         return false;
 
     /*
      * Nvme has a very convoluted prp format.  One prp is required
      * for each page or partial page. Driver need to split up OS sg_list
      * entries if it is longer than one page or cross a page
      * boundary.  Driver also have to insert a PRP list pointer entry as
      * the last entry in each physical page of the PRP list.
      *
      * NOTE: The first PRP "entry" is actually placed in the first
      * SGL entry in the main message as IEEE 64 format.  The 2nd
      * entry in the main message is the chain element, and the rest
      * of the PRP entries are built in the contiguous pcie buffer.
      */
     page_mask = mr_nvme_pg_size - 1;
     ptr_sgl = (u64 *)cmd->sg_frame;
     ptr_sgl_phys = cmd->sg_frame_phys_addr;
     memset(ptr_sgl, 0, instance->max_chain_frame_sz);
 
     /* Build chain frame element which holds all prps except first*/
     main_chain_element = (struct MPI25_IEEE_SGE_CHAIN64 *)
         ((u8 *)sgl_ptr + sizeof(struct MPI25_IEEE_SGE_CHAIN64));
 
     main_chain_element->Address = cpu_to_le64(ptr_sgl_phys);
     main_chain_element->NextChainOffset = 0;
     main_chain_element->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
                     IEEE_SGE_FLAGS_SYSTEM_ADDR |
                     MPI26_IEEE_SGE_FLAGS_NSF_NVME_PRP;
 
     /* Build first prp, sge need not to be page aligned*/
     ptr_first_sgl = sgl_ptr;
     sg_scmd = scsi_sglist(scmd);
     sge_addr = sg_dma_address(sg_scmd);
     sge_len = sg_dma_len(sg_scmd);
 
     offset = (u32)(sge_addr & page_mask);
     first_prp_len = mr_nvme_pg_size - offset;
 
     ptr_first_sgl->Address = cpu_to_le64(sge_addr);
     ptr_first_sgl->Length = cpu_to_le32(first_prp_len);
 
     data_len -= first_prp_len;
 
     if (sge_len > first_prp_len) {
         sge_addr += first_prp_len;
         sge_len -= first_prp_len;
     } else if (sge_len == first_prp_len) {
         sg_scmd = sg_next(sg_scmd);
         sge_addr = sg_dma_address(sg_scmd);
         sge_len = sg_dma_len(sg_scmd);
     }
 
     for (;;) {
         offset = (u32)(sge_addr & page_mask);
 
         /* Put PRP pointer due to page boundary*/
         page_mask_result = (uintptr_t)(ptr_sgl + 1) & page_mask;
         if (unlikely(!page_mask_result)) {
             scmd_printk(KERN_NOTICE,
                     scmd, "page boundary ptr_sgl: 0x%p\n",
                     ptr_sgl);
             ptr_sgl_phys += 8;
             *ptr_sgl = cpu_to_le64(ptr_sgl_phys);
             ptr_sgl++;
             num_prp_in_chain++;
         }
 
         *ptr_sgl = cpu_to_le64(sge_addr);
         ptr_sgl++;
         ptr_sgl_phys += 8;
         num_prp_in_chain++;
 
         sge_addr += mr_nvme_pg_size;
         sge_len -= mr_nvme_pg_size;
         data_len -= mr_nvme_pg_size;
 
         if (data_len <= 0)
             break;
 
         if (sge_len > 0)
             continue;
 
         sg_scmd = sg_next(sg_scmd);
         sge_addr = sg_dma_address(sg_scmd);
         sge_len = sg_dma_len(sg_scmd);
     }
 
     main_chain_element->Length =
             cpu_to_le32(num_prp_in_chain * sizeof(u64));
 
     return build_prp;
 }
 
 /**
  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
  * @instance:       Adapter soft state
  * @scp:        SCSI command from the mid-layer
  * @sgl_ptr:        SGL to be filled in
  * @cmd:        cmd we are working on
  * @sge_count:      sge count
  *
  */
 static void
 megasas_make_sgl_fusion(struct megasas_instance *instance,
             struct scsi_cmnd *scp,
             struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
             struct megasas_cmd_fusion *cmd, int sge_count)
 {
     int i, sg_processed;
     struct scatterlist *os_sgl;
     struct fusion_context *fusion;
 
     fusion = instance->ctrl_context;
 
     if (instance->adapter_type >= INVADER_SERIES) {
         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
         sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
         sgl_ptr_end->Flags = 0;
     }
 
     scsi_for_each_sg(scp, os_sgl, sge_count, i) {
         sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl));
         sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl));
         sgl_ptr->Flags = 0;
         if (instance->adapter_type >= INVADER_SERIES)
             if (i == sge_count - 1)
                 sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
         sgl_ptr++;
         sg_processed = i + 1;
 
         if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
             (sge_count > fusion->max_sge_in_main_msg)) {
 
             struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
             if (instance->adapter_type >= INVADER_SERIES) {
                 if ((le16_to_cpu(cmd->io_request->IoFlags) &
                     MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
                     MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
                     cmd->io_request->ChainOffset =
                         fusion->
                         chain_offset_io_request;
                 else
                     cmd->io_request->ChainOffset = 0;
             } else
                 cmd->io_request->ChainOffset =
                     fusion->chain_offset_io_request;
 
             sg_chain = sgl_ptr;
             /* Prepare chain element */
             sg_chain->NextChainOffset = 0;
             if (instance->adapter_type >= INVADER_SERIES)
                 sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
             else
                 sg_chain->Flags =
                     (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
                      MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
             sg_chain->Length =  cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed)));
             sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr);
 
             sgl_ptr =
               (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
             memset(sgl_ptr, 0, instance->max_chain_frame_sz);
         }
     }
 }
 
 /**
  * megasas_make_sgl -   Build Scatter Gather List(SGLs)
  * @scp:        SCSI command pointer
  * @instance:       Soft instance of controller
  * @cmd:        Fusion command pointer
  *
  * This function will build sgls based on device type.
  * For nvme drives, there is different way of building sgls in nvme native
  * format- PRPs(Physical Region Page).
  *
  * Returns the number of sg lists actually used, zero if the sg lists
  * is NULL, or -ENOMEM if the mapping failed
  */
 static
 int megasas_make_sgl(struct megasas_instance *instance, struct scsi_cmnd *scp,
              struct megasas_cmd_fusion *cmd)
 {
     int sge_count;
     bool build_prp = false;
     struct MPI25_IEEE_SGE_CHAIN64 *sgl_chain64;
 
     sge_count = scsi_dma_map(scp);
 
     if ((sge_count > instance->max_num_sge) || (sge_count <= 0))
         return sge_count;
 
     sgl_chain64 = (struct MPI25_IEEE_SGE_CHAIN64 *)&cmd->io_request->SGL;
     if ((le16_to_cpu(cmd->io_request->IoFlags) &
         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) &&
         (cmd->pd_interface == NVME_PD))
         build_prp = megasas_make_prp_nvme(instance, scp, sgl_chain64,
                           cmd, sge_count);
 
     if (!build_prp)
         megasas_make_sgl_fusion(instance, scp, sgl_chain64,
                     cmd, sge_count);
 
     return sge_count;
 }
 
 /**
  * megasas_set_pd_lba - Sets PD LBA
  * @io_request:     IO request
  * @cdb_len:        cdb length
  * @io_info:        IO information
  * @scp:        SCSI command
  * @local_map_ptr:  Raid map
  * @ref_tag:        Primary reference tag
  *
  * Used to set the PD LBA in CDB for FP IOs
  */
 static void
 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
            struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
            struct MR_DRV_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
 {
     struct MR_LD_RAID *raid;
     u16 ld;
     u64 start_blk = io_info->pdBlock;
     u8 *cdb = io_request->CDB.CDB32;
     u32 num_blocks = io_info->numBlocks;
     u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
 
     /* Check if T10 PI (DIF) is enabled for this LD */
     ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
     raid = MR_LdRaidGet(ld, local_map_ptr);
     if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
         cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
         cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
 
         if (scp->sc_data_direction == DMA_FROM_DEVICE)
             cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
         else
             cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
         cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
 
         /* LBA */
         cdb[12] = (u8)((start_blk >> 56) & 0xff);
         cdb[13] = (u8)((start_blk >> 48) & 0xff);
         cdb[14] = (u8)((start_blk >> 40) & 0xff);
         cdb[15] = (u8)((start_blk >> 32) & 0xff);
         cdb[16] = (u8)((start_blk >> 24) & 0xff);
         cdb[17] = (u8)((start_blk >> 16) & 0xff);
         cdb[18] = (u8)((start_blk >> 8) & 0xff);
         cdb[19] = (u8)(start_blk & 0xff);
 
         /* Logical block reference tag */
         io_request->CDB.EEDP32.PrimaryReferenceTag =
             cpu_to_be32(ref_tag);
         io_request->CDB.EEDP32.PrimaryApplicationTagMask = cpu_to_be16(0xffff);
         io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */
 
         /* Transfer length */
         cdb[28] = (u8)((num_blocks >> 24) & 0xff);
         cdb[29] = (u8)((num_blocks >> 16) & 0xff);
         cdb[30] = (u8)((num_blocks >> 8) & 0xff);
         cdb[31] = (u8)(num_blocks & 0xff);
 
         /* set SCSI IO EEDPFlags */
         if (scp->sc_data_direction == DMA_FROM_DEVICE) {
             io_request->EEDPFlags = cpu_to_le16(
                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
                 MPI25_SCSIIO_EEDPFLAGS_DO_NOT_DISABLE_MODE |
                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD);
         } else {
             io_request->EEDPFlags = cpu_to_le16(
                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP);
         }
         io_request->Control |= cpu_to_le32((0x4 << 26));
         io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size);
     } else {
         /* Some drives don't support 16/12 byte CDB's, convert to 10 */
         if (((cdb_len == 12) || (cdb_len == 16)) &&
             (start_blk <= 0xffffffff)) {
             if (cdb_len == 16) {
                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
                 flagvals = cdb[1];
                 groupnum = cdb[14];
                 control = cdb[15];
             } else {
                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
                 flagvals = cdb[1];
                 groupnum = cdb[10];
                 control = cdb[11];
             }
 
             memset(cdb, 0, sizeof(io_request->CDB.CDB32));
 
             cdb[0] = opcode;
             cdb[1] = flagvals;
             cdb[6] = groupnum;
             cdb[9] = control;
 
             /* Transfer length */
             cdb[8] = (u8)(num_blocks & 0xff);
             cdb[7] = (u8)((num_blocks >> 8) & 0xff);
 
             io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */
             cdb_len = 10;
         } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
             /* Convert to 16 byte CDB for large LBA's */
             switch (cdb_len) {
             case 6:
                 opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
                 control = cdb[5];
                 break;
             case 10:
                 opcode =
                     cdb[0] == READ_10 ? READ_16 : WRITE_16;
                 flagvals = cdb[1];
                 groupnum = cdb[6];
                 control = cdb[9];
                 break;
             case 12:
                 opcode =
                     cdb[0] == READ_12 ? READ_16 : WRITE_16;
                 flagvals = cdb[1];
                 groupnum = cdb[10];
                 control = cdb[11];
                 break;
             }
 
             memset(cdb, 0, sizeof(io_request->CDB.CDB32));
 
             cdb[0] = opcode;
             cdb[1] = flagvals;
             cdb[14] = groupnum;
             cdb[15] = control;
 
             /* Transfer length */
             cdb[13] = (u8)(num_blocks & 0xff);
             cdb[12] = (u8)((num_blocks >> 8) & 0xff);
             cdb[11] = (u8)((num_blocks >> 16) & 0xff);
             cdb[10] = (u8)((num_blocks >> 24) & 0xff);
 
             io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */
             cdb_len = 16;
         }
 
         /* Normal case, just load LBA here */
         switch (cdb_len) {
         case 6:
         {
             u8 val = cdb[1] & 0xE0;
             cdb[3] = (u8)(start_blk & 0xff);
             cdb[2] = (u8)((start_blk >> 8) & 0xff);
             cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
             break;
         }
         case 10:
             cdb[5] = (u8)(start_blk & 0xff);
             cdb[4] = (u8)((start_blk >> 8) & 0xff);
             cdb[3] = (u8)((start_blk >> 16) & 0xff);
             cdb[2] = (u8)((start_blk >> 24) & 0xff);
             break;
         case 12:
             cdb[5]    = (u8)(start_blk & 0xff);
             cdb[4]    = (u8)((start_blk >> 8) & 0xff);
             cdb[3]    = (u8)((start_blk >> 16) & 0xff);
             cdb[2]    = (u8)((start_blk >> 24) & 0xff);
             break;
         case 16:
             cdb[9]    = (u8)(start_blk & 0xff);
             cdb[8]    = (u8)((start_blk >> 8) & 0xff);
             cdb[7]    = (u8)((start_blk >> 16) & 0xff);
             cdb[6]    = (u8)((start_blk >> 24) & 0xff);
             cdb[5]    = (u8)((start_blk >> 32) & 0xff);
             cdb[4]    = (u8)((start_blk >> 40) & 0xff);
             cdb[3]    = (u8)((start_blk >> 48) & 0xff);
             cdb[2]    = (u8)((start_blk >> 56) & 0xff);
             break;
         }
     }
 }
 
 /**
  * megasas_stream_detect -  stream detection on read and and write IOs
  * @instance:       Adapter soft state
  * @cmd:            Command to be prepared
  * @io_info:        IO Request info
  *
  */
 
 /** stream detection on read and and write IOs */
 static void megasas_stream_detect(struct megasas_instance *instance,
                   struct megasas_cmd_fusion *cmd,
                   struct IO_REQUEST_INFO *io_info)
 {
     struct fusion_context *fusion = instance->ctrl_context;
     u32 device_id = io_info->ldTgtId;
     struct LD_STREAM_DETECT *current_ld_sd
         = fusion->stream_detect_by_ld[device_id];
     u32 *track_stream = &current_ld_sd->mru_bit_map, stream_num;
     u32 shifted_values, unshifted_values;
     u32 index_value_mask, shifted_values_mask;
     int i;
     bool is_read_ahead = false;
     struct STREAM_DETECT *current_sd;
     /* find possible stream */
     for (i = 0; i < MAX_STREAMS_TRACKED; ++i) {
         stream_num = (*track_stream >>
             (i * BITS_PER_INDEX_STREAM)) &
             STREAM_MASK;
         current_sd = &current_ld_sd->stream_track[stream_num];
         /* if we found a stream, update the raid
          *  context and also update the mruBitMap
          */
         /*  boundary condition */
         if ((current_sd->next_seq_lba) &&
             (io_info->ldStartBlock >= current_sd->next_seq_lba) &&
             (io_info->ldStartBlock <= (current_sd->next_seq_lba + 32)) &&
             (current_sd->is_read == io_info->isRead)) {
 
             if ((io_info->ldStartBlock != current_sd->next_seq_lba) &&
                 ((!io_info->isRead) || (!is_read_ahead)))
                 /*
                  * Once the API availible we need to change this.
                  * At this point we are not allowing any gap
                  */
                 continue;
 
             SET_STREAM_DETECTED(cmd->io_request->RaidContext.raid_context_g35);
             current_sd->next_seq_lba =
             io_info->ldStartBlock + io_info->numBlocks;
             /*
              *  update the mruBitMap LRU
              */
             shifted_values_mask =
                 (1 <<  i * BITS_PER_INDEX_STREAM) - 1;
             shifted_values = ((*track_stream & shifted_values_mask)
                         << BITS_PER_INDEX_STREAM);
             index_value_mask =
                 STREAM_MASK << i * BITS_PER_INDEX_STREAM;
             unshifted_values =
                 *track_stream & ~(shifted_values_mask |
                 index_value_mask);
             *track_stream =
                 unshifted_values | shifted_values | stream_num;
             return;
         }
     }
     /*
      * if we did not find any stream, create a new one
      * from the least recently used
      */
     stream_num = (*track_stream >>
         ((MAX_STREAMS_TRACKED - 1) * BITS_PER_INDEX_STREAM)) &
         STREAM_MASK;
     current_sd = &current_ld_sd->stream_track[stream_num];
     current_sd->is_read = io_info->isRead;
     current_sd->next_seq_lba = io_info->ldStartBlock + io_info->numBlocks;
     *track_stream = (((*track_stream & ZERO_LAST_STREAM) << 4) | stream_num);
     return;
 }
 
 /**
  * megasas_set_raidflag_cpu_affinity - This function sets the cpu
  * affinity (cpu of the controller) and raid_flags in the raid context
  * based on IO type.
  *
  * @fusion:     Fusion context
  * @praid_context:  IO RAID context
  * @raid:       LD raid map
  * @fp_possible:    Is fast path possible?
  * @is_read:        Is read IO?
  * @scsi_buff_len:  SCSI command buffer length
  *
  */
 static void
 megasas_set_raidflag_cpu_affinity(struct fusion_context *fusion,
                 union RAID_CONTEXT_UNION *praid_context,
                 struct MR_LD_RAID *raid, bool fp_possible,
                 u8 is_read, u32 scsi_buff_len)
 {
     u8 cpu_sel = MR_RAID_CTX_CPUSEL_0;
     struct RAID_CONTEXT_G35 *rctx_g35;
 
     rctx_g35 = &praid_context->raid_context_g35;
     if (fp_possible) {
         if (is_read) {
             if ((raid->cpuAffinity.pdRead.cpu0) &&
                 (raid->cpuAffinity.pdRead.cpu1))
                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
             else if (raid->cpuAffinity.pdRead.cpu1)
                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
         } else {
             if ((raid->cpuAffinity.pdWrite.cpu0) &&
                 (raid->cpuAffinity.pdWrite.cpu1))
                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
             else if (raid->cpuAffinity.pdWrite.cpu1)
                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
             /* Fast path cache by pass capable R0/R1 VD */
             if ((raid->level <= 1) &&
                 (raid->capability.fp_cache_bypass_capable)) {
                 rctx_g35->routing_flags |=
                     (1 << MR_RAID_CTX_ROUTINGFLAGS_SLD_SHIFT);
                 rctx_g35->raid_flags =
                     (MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS
                     << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
             }
         }
     } else {
         if (is_read) {
             if ((raid->cpuAffinity.ldRead.cpu0) &&
                 (raid->cpuAffinity.ldRead.cpu1))
                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
             else if (raid->cpuAffinity.ldRead.cpu1)
                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
         } else {
             if ((raid->cpuAffinity.ldWrite.cpu0) &&
                 (raid->cpuAffinity.ldWrite.cpu1))
                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
             else if (raid->cpuAffinity.ldWrite.cpu1)
                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
 
             if (is_stream_detected(rctx_g35) &&
                 ((raid->level == 5) || (raid->level == 6)) &&
                 (raid->writeMode == MR_RL_WRITE_THROUGH_MODE) &&
                 (cpu_sel == MR_RAID_CTX_CPUSEL_FCFS))
                 cpu_sel = MR_RAID_CTX_CPUSEL_0;
         }
     }
 
     rctx_g35->routing_flags |=
         (cpu_sel << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
 
     /* Always give priority to MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
      * vs MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS.
      * IO Subtype is not bitmap.
      */
     if ((fusion->pcie_bw_limitation) && (raid->level == 1) && (!is_read) &&
             (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)) {
         praid_context->raid_context_g35.raid_flags =
             (MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
             << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
     }
 }
 
 /**
  * megasas_build_ldio_fusion -  Prepares IOs to devices
  * @instance:       Adapter soft state
  * @scp:        SCSI command
  * @cmd:        Command to be prepared
  *
  * Prepares the io_request and chain elements (sg_frame) for IO
  * The IO can be for PD (Fast Path) or LD
  */
 static void
 megasas_build_ldio_fusion(struct megasas_instance *instance,
               struct scsi_cmnd *scp,
               struct megasas_cmd_fusion *cmd)
 {
     bool fp_possible;
     u16 ld;
     u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
     u32 scsi_buff_len;
     struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
     struct IO_REQUEST_INFO io_info;
     struct fusion_context *fusion;
     struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
     u8 *raidLUN;
     unsigned long spinlock_flags;
     struct MR_LD_RAID *raid = NULL;
     struct MR_PRIV_DEVICE *mrdev_priv;
     struct RAID_CONTEXT *rctx;
     struct RAID_CONTEXT_G35 *rctx_g35;
 
     device_id = MEGASAS_DEV_INDEX(scp);
 
     fusion = instance->ctrl_context;
 
     io_request = cmd->io_request;
     rctx = &io_request->RaidContext.raid_context;
     rctx_g35 = &io_request->RaidContext.raid_context_g35;
 
     rctx->virtual_disk_tgt_id = cpu_to_le16(device_id);
     rctx->status = 0;
     rctx->ex_status = 0;
 
     start_lba_lo = 0;
     start_lba_hi = 0;
     fp_possible = false;
 
     /*
      * 6-byte READ(0x08) or WRITE(0x0A) cdb
      */
     if (scp->cmd_len == 6) {
         datalength = (u32) scp->cmnd[4];
         start_lba_lo = ((u32) scp->cmnd[1] << 16) |
             ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
 
         start_lba_lo &= 0x1FFFFF;
     }
 
     /*
      * 10-byte READ(0x28) or WRITE(0x2A) cdb
      */
     else if (scp->cmd_len == 10) {
         datalength = (u32) scp->cmnd[8] |
             ((u32) scp->cmnd[7] << 8);
         start_lba_lo = ((u32) scp->cmnd[2] << 24) |
             ((u32) scp->cmnd[3] << 16) |
             ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
     }
 
     /*
      * 12-byte READ(0xA8) or WRITE(0xAA) cdb
      */
     else if (scp->cmd_len == 12) {
         datalength = ((u32) scp->cmnd[6] << 24) |
             ((u32) scp->cmnd[7] << 16) |
             ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
         start_lba_lo = ((u32) scp->cmnd[2] << 24) |
             ((u32) scp->cmnd[3] << 16) |
             ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
     }
 
     /*
      * 16-byte READ(0x88) or WRITE(0x8A) cdb
      */
     else if (scp->cmd_len == 16) {
         datalength = ((u32) scp->cmnd[10] << 24) |
             ((u32) scp->cmnd[11] << 16) |
             ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
         start_lba_lo = ((u32) scp->cmnd[6] << 24) |
             ((u32) scp->cmnd[7] << 16) |
             ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
 
         start_lba_hi = ((u32) scp->cmnd[2] << 24) |
             ((u32) scp->cmnd[3] << 16) |
             ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
     }
 
     memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
     io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
     io_info.numBlocks = datalength;
     io_info.ldTgtId = device_id;
     io_info.r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
     scsi_buff_len = scsi_bufflen(scp);
     io_request->DataLength = cpu_to_le32(scsi_buff_len);
     io_info.data_arms = 1;
 
     if (scp->sc_data_direction == DMA_FROM_DEVICE)
         io_info.isRead = 1;
 
     local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
     ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
 
     if (ld < instance->fw_supported_vd_count)
         raid = MR_LdRaidGet(ld, local_map_ptr);
 
     if (!raid || (!fusion->fast_path_io)) {
         rctx->reg_lock_flags  = 0;
         fp_possible = false;
     } else {
         if (MR_BuildRaidContext(instance, &io_info, rctx,
                     local_map_ptr, &raidLUN))
             fp_possible = (io_info.fpOkForIo > 0) ? true : false;
     }
 
     megasas_get_msix_index(instance, scp, cmd, io_info.data_arms);
 
     if (instance->adapter_type >= VENTURA_SERIES) {
         /* FP for Optimal raid level 1.
          * All large RAID-1 writes (> 32 KiB, both WT and WB modes)
          * are built by the driver as LD I/Os.
          * All small RAID-1 WT writes (<= 32 KiB) are built as FP I/Os
          * (there is never a reason to process these as buffered writes)
          * All small RAID-1 WB writes (<= 32 KiB) are built as FP I/Os
          * with the SLD bit asserted.
          */
         if (io_info.r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
             mrdev_priv = scp->device->hostdata;
 
             if (atomic_inc_return(&instance->fw_outstanding) >
                 (instance->host->can_queue)) {
                 fp_possible = false;
                 atomic_dec(&instance->fw_outstanding);
             } else if (fusion->pcie_bw_limitation &&
                 ((scsi_buff_len > MR_LARGE_IO_MIN_SIZE) ||
                    (atomic_dec_if_positive(&mrdev_priv->r1_ldio_hint) > 0))) {
                 fp_possible = false;
                 atomic_dec(&instance->fw_outstanding);
                 if (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)
                     atomic_set(&mrdev_priv->r1_ldio_hint,
                            instance->r1_ldio_hint_default);
             }
         }
 
         if (!fp_possible ||
             (io_info.isRead && io_info.ra_capable)) {
             spin_lock_irqsave(&instance->stream_lock,
                       spinlock_flags);
             megasas_stream_detect(instance, cmd, &io_info);
             spin_unlock_irqrestore(&instance->stream_lock,
                            spinlock_flags);
             /* In ventura if stream detected for a read and it is
              * read ahead capable make this IO as LDIO
              */
             if (is_stream_detected(rctx_g35))
                 fp_possible = false;
         }
 
         /* If raid is NULL, set CPU affinity to default CPU0 */
         if (raid)
             megasas_set_raidflag_cpu_affinity(fusion, &io_request->RaidContext,
                 raid, fp_possible, io_info.isRead,
                 scsi_buff_len);
         else
             rctx_g35->routing_flags |=
                 (MR_RAID_CTX_CPUSEL_0 << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
     }
 
     if (fp_possible) {
         megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
                    local_map_ptr, start_lba_lo);
         io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
         cmd->request_desc->SCSIIO.RequestFlags =
             (MPI2_REQ_DESCRIPT_FLAGS_FP_IO
              << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
         if (instance->adapter_type == INVADER_SERIES) {
             rctx->type = MPI2_TYPE_CUDA;
             rctx->nseg = 0x1;
             io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
             rctx->reg_lock_flags |=
               (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
                MR_RL_FLAGS_SEQ_NUM_ENABLE);
         } else if (instance->adapter_type >= VENTURA_SERIES) {
             rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
             rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
             rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
             io_request->IoFlags |=
                 cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
         }
         if (fusion->load_balance_info &&
             (fusion->load_balance_info[device_id].loadBalanceFlag) &&
             (io_info.isRead)) {
             io_info.devHandle =
                 get_updated_dev_handle(instance,
                     &fusion->load_balance_info[device_id],
                     &io_info, local_map_ptr);
             megasas_priv(scp)->status |= MEGASAS_LOAD_BALANCE_FLAG;
             cmd->pd_r1_lb = io_info.pd_after_lb;
             if (instance->adapter_type >= VENTURA_SERIES)
                 rctx_g35->span_arm = io_info.span_arm;
             else
                 rctx->span_arm = io_info.span_arm;
 
         } else
             megasas_priv(scp)->status &= ~MEGASAS_LOAD_BALANCE_FLAG;
 
         if (instance->adapter_type >= VENTURA_SERIES)
             cmd->r1_alt_dev_handle = io_info.r1_alt_dev_handle;
         else
             cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
 
         if ((raidLUN[0] == 1) &&
             (local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].validHandles > 1)) {
             instance->dev_handle = !(instance->dev_handle);
             io_info.devHandle =
                 local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].devHandle[instance->dev_handle];
         }
 
         cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
         io_request->DevHandle = io_info.devHandle;
         cmd->pd_interface = io_info.pd_interface;
         /* populate the LUN field */
         memcpy(io_request->LUN, raidLUN, 8);
     } else {
         rctx->timeout_value =
             cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
         cmd->request_desc->SCSIIO.RequestFlags =
             (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
              << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
         if (instance->adapter_type == INVADER_SERIES) {
             if (io_info.do_fp_rlbypass ||
             (rctx->reg_lock_flags == REGION_TYPE_UNUSED))
                 cmd->request_desc->SCSIIO.RequestFlags =
                     (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
                     MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
             rctx->type = MPI2_TYPE_CUDA;
             rctx->reg_lock_flags |=
                 (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
                     MR_RL_FLAGS_SEQ_NUM_ENABLE);
             rctx->nseg = 0x1;
         } else if (instance->adapter_type >= VENTURA_SERIES) {
             rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
             rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
             rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
         }
         io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
         io_request->DevHandle = cpu_to_le16(device_id);
 
     } /* Not FP */
 }
 
 /**
  * megasas_build_ld_nonrw_fusion - prepares non rw ios for virtual disk
  * @instance:       Adapter soft state
  * @scmd:       SCSI command
  * @cmd:        Command to be prepared
  *
  * Prepares the io_request frame for non-rw io cmds for vd.
  */
 static void megasas_build_ld_nonrw_fusion(struct megasas_instance *instance,
               struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd)
 {
     u32 device_id;
     struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
     u16 ld;
     struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
     struct fusion_context *fusion = instance->ctrl_context;
     u8                          span, physArm;
     __le16                      devHandle;
     u32                         arRef, pd;
     struct MR_LD_RAID                  *raid;
     struct RAID_CONTEXT                *pRAID_Context;
     u8 fp_possible = 1;
 
     io_request = cmd->io_request;
     device_id = MEGASAS_DEV_INDEX(scmd);
     local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
     io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
     /* get RAID_Context pointer */
     pRAID_Context = &io_request->RaidContext.raid_context;
     /* Check with FW team */
     pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
     pRAID_Context->reg_lock_row_lba    = 0;
     pRAID_Context->reg_lock_length    = 0;
 
     if (fusion->fast_path_io && (
         device_id < instance->fw_supported_vd_count)) {
 
         ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
         if (ld >= instance->fw_supported_vd_count - 1)
             fp_possible = 0;
         else {
             raid = MR_LdRaidGet(ld, local_map_ptr);
             if (!(raid->capability.fpNonRWCapable))
                 fp_possible = 0;
         }
     } else
         fp_possible = 0;
 
     if (!fp_possible) {
         io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
         io_request->DevHandle = cpu_to_le16(device_id);
         io_request->LUN[1] = scmd->device->lun;
         pRAID_Context->timeout_value =
             cpu_to_le16(scsi_cmd_to_rq(scmd)->timeout / HZ);
         cmd->request_desc->SCSIIO.RequestFlags =
             (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
             MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
     } else {
 
         /* set RAID context values */
         pRAID_Context->config_seq_num = raid->seqNum;
         if (instance->adapter_type < VENTURA_SERIES)
             pRAID_Context->reg_lock_flags = REGION_TYPE_SHARED_READ;
         pRAID_Context->timeout_value =
             cpu_to_le16(raid->fpIoTimeoutForLd);
 
         /* get the DevHandle for the PD (since this is
            fpNonRWCapable, this is a single disk RAID0) */
         span = physArm = 0;
         arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
         pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
         devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
 
         /* build request descriptor */
         cmd->request_desc->SCSIIO.RequestFlags =
             (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
             MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
         cmd->request_desc->SCSIIO.DevHandle = devHandle;
 
         /* populate the LUN field */
         memcpy(io_request->LUN, raid->LUN, 8);
 
         /* build the raidScsiIO structure */
         io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
         io_request->DevHandle = devHandle;
     }
 }
 
 /**
  * megasas_build_syspd_fusion - prepares rw/non-rw ios for syspd
  * @instance:       Adapter soft state
  * @scmd:       SCSI command
  * @cmd:        Command to be prepared
  * @fp_possible:    parameter to detect fast path or firmware path io.
  *
  * Prepares the io_request frame for rw/non-rw io cmds for syspds
  */
 static void
 megasas_build_syspd_fusion(struct megasas_instance *instance,
     struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd,
     bool fp_possible)
 {
     u32 device_id;
     struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
     u16 pd_index = 0;
     u16 os_timeout_value;
     u16 timeout_limit;
     struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
     struct RAID_CONTEXT *pRAID_Context;
     struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
     struct MR_PRIV_DEVICE *mr_device_priv_data;
     struct fusion_context *fusion = instance->ctrl_context;
     pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id - 1) & 1];
 
     device_id = MEGASAS_DEV_INDEX(scmd);
     pd_index = MEGASAS_PD_INDEX(scmd);
     os_timeout_value = scsi_cmd_to_rq(scmd)->timeout / HZ;
     mr_device_priv_data = scmd->device->hostdata;
     cmd->pd_interface = mr_device_priv_data->interface_type;
 
     io_request = cmd->io_request;
     /* get RAID_Context pointer */
     pRAID_Context = &io_request->RaidContext.raid_context;
     pRAID_Context->reg_lock_flags = 0;
     pRAID_Context->reg_lock_row_lba = 0;
     pRAID_Context->reg_lock_length = 0;
     io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
     io_request->LUN[1] = scmd->device->lun;
     pRAID_Context->raid_flags = MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD
         << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
 
     /* If FW supports PD sequence number */
     if (instance->support_seqnum_jbod_fp) {
         if (instance->use_seqnum_jbod_fp &&
             instance->pd_list[pd_index].driveType == TYPE_DISK) {
 
             /* More than 256 PD/JBOD support for Ventura */
             if (instance->support_morethan256jbod)
                 pRAID_Context->virtual_disk_tgt_id =
                     pd_sync->seq[pd_index].pd_target_id;
             else
                 pRAID_Context->virtual_disk_tgt_id =
                     cpu_to_le16(device_id +
                     (MAX_PHYSICAL_DEVICES - 1));
             pRAID_Context->config_seq_num =
                 pd_sync->seq[pd_index].seqNum;
             io_request->DevHandle =
                 pd_sync->seq[pd_index].devHandle;
             if (instance->adapter_type >= VENTURA_SERIES) {
                 io_request->RaidContext.raid_context_g35.routing_flags |=
                     (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
                 io_request->RaidContext.raid_context_g35.nseg_type |=
                     (1 << RAID_CONTEXT_NSEG_SHIFT);
                 io_request->RaidContext.raid_context_g35.nseg_type |=
                     (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
             } else {
                 pRAID_Context->type = MPI2_TYPE_CUDA;
                 pRAID_Context->nseg = 0x1;
                 pRAID_Context->reg_lock_flags |=
                     (MR_RL_FLAGS_SEQ_NUM_ENABLE |
                      MR_RL_FLAGS_GRANT_DESTINATION_CUDA);
             }
         } else {
             pRAID_Context->virtual_disk_tgt_id =
                 cpu_to_le16(device_id +
                 (MAX_PHYSICAL_DEVICES - 1));
             pRAID_Context->config_seq_num = 0;
             io_request->DevHandle = cpu_to_le16(0xFFFF);
         }
     } else {
         pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
         pRAID_Context->config_seq_num = 0;
 
         if (fusion->fast_path_io) {
             local_map_ptr =
                 fusion->ld_drv_map[(instance->map_id & 1)];
             io_request->DevHandle =
                 local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
         } else {
             io_request->DevHandle = cpu_to_le16(0xFFFF);
         }
     }
 
     cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
 
     megasas_get_msix_index(instance, scmd, cmd, 1);
 
     if (!fp_possible) {
         /* system pd firmware path */
         io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
         cmd->request_desc->SCSIIO.RequestFlags =
             (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
         pRAID_Context->timeout_value = cpu_to_le16(os_timeout_value);
         pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
     } else {
         if (os_timeout_value)
             os_timeout_value++;
 
         /* system pd Fast Path */
         io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
         timeout_limit = (scmd->device->type == TYPE_DISK) ?
                 255 : 0xFFFF;
         pRAID_Context->timeout_value =
             cpu_to_le16((os_timeout_value > timeout_limit) ?
             timeout_limit : os_timeout_value);
         if (instance->adapter_type >= INVADER_SERIES)
             io_request->IoFlags |=
                 cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
 
         cmd->request_desc->SCSIIO.RequestFlags =
             (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
     }
 }
 
 /**
  * megasas_build_io_fusion -    Prepares IOs to devices
  * @instance:       Adapter soft state
  * @scp:        SCSI command
  * @cmd:        Command to be prepared
  *
  * Invokes helper functions to prepare request frames
  * and sets flags appropriate for IO/Non-IO cmd
  */
 static int
 megasas_build_io_fusion(struct megasas_instance *instance,
             struct scsi_cmnd *scp,
             struct megasas_cmd_fusion *cmd)
 {
     int sge_count;
     u16 pd_index = 0;
     u8 drive_type = 0;
     struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
     struct MR_PRIV_DEVICE *mr_device_priv_data;
     mr_device_priv_data = scp->device->hostdata;
 
     /* Zero out some fields so they don't get reused */
     memset(io_request->LUN, 0x0, 8);
     io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
     io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
     io_request->EEDPFlags = 0;
     io_request->Control = 0;
     io_request->EEDPBlockSize = 0;
     io_request->ChainOffset = 0;
     io_request->RaidContext.raid_context.raid_flags = 0;
     io_request->RaidContext.raid_context.type = 0;
     io_request->RaidContext.raid_context.nseg = 0;
 
     memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
     /*
      * Just the CDB length,rest of the Flags are zero
      * This will be modified for FP in build_ldio_fusion
      */
     io_request->IoFlags = cpu_to_le16(scp->cmd_len);
 
     switch (megasas_cmd_type(scp)) {
     case READ_WRITE_LDIO:
         megasas_build_ldio_fusion(instance, scp, cmd);
         break;
     case NON_READ_WRITE_LDIO:
         megasas_build_ld_nonrw_fusion(instance, scp, cmd);
         break;
     case READ_WRITE_SYSPDIO:
         megasas_build_syspd_fusion(instance, scp, cmd, true);
         break;
     case NON_READ_WRITE_SYSPDIO:
         pd_index = MEGASAS_PD_INDEX(scp);
         drive_type = instance->pd_list[pd_index].driveType;
         if ((instance->secure_jbod_support ||
              mr_device_priv_data->is_tm_capable) ||
              (instance->adapter_type >= VENTURA_SERIES &&
              drive_type == TYPE_ENCLOSURE))
             megasas_build_syspd_fusion(instance, scp, cmd, false);
         else
             megasas_build_syspd_fusion(instance, scp, cmd, true);
         break;
     default:
         break;
     }
 
     /*
      * Construct SGL
      */
 
     sge_count = megasas_make_sgl(instance, scp, cmd);
 
     if (sge_count > instance->max_num_sge || (sge_count < 0)) {
         dev_err(&instance->pdev->dev,
             "%s %d sge_count (%d) is out of range. Range is:  0-%d\n",
             __func__, __LINE__, sge_count, instance->max_num_sge);
         return 1;
     }
 
     if (instance->adapter_type >= VENTURA_SERIES) {
         set_num_sge(&io_request->RaidContext.raid_context_g35, sge_count);
         cpu_to_le16s(&io_request->RaidContext.raid_context_g35.routing_flags);
         cpu_to_le16s(&io_request->RaidContext.raid_context_g35.nseg_type);
     } else {
         /* numSGE store lower 8 bit of sge_count.
          * numSGEExt store higher 8 bit of sge_count
          */
         io_request->RaidContext.raid_context.num_sge = sge_count;
         io_request->RaidContext.raid_context.num_sge_ext =
             (u8)(sge_count >> 8);
     }
 
     io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING);
 
     if (scp->sc_data_direction == DMA_TO_DEVICE)
         io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE);
     else if (scp->sc_data_direction == DMA_FROM_DEVICE)
         io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ);
 
     io_request->SGLOffset0 =
         offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
 
     io_request->SenseBufferLowAddress =
         cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));
     io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
 
     cmd->scmd = scp;
     megasas_priv(scp)->cmd_priv = cmd;
 
     return 0;
 }
 
 static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
 {
     u8 *p;
     struct fusion_context *fusion;
 
     fusion = instance->ctrl_context;
     p = fusion->req_frames_desc +
         sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) * index;
 
     return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
 }
 
 
 /* megasas_prepate_secondRaid1_IO
  *  It prepares the raid 1 second IO
  */
 static void megasas_prepare_secondRaid1_IO(struct megasas_instance *instance,
                        struct megasas_cmd_fusion *cmd,
                        struct megasas_cmd_fusion *r1_cmd)
 {
     union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc, *req_desc2 = NULL;
     struct fusion_context *fusion;
     fusion = instance->ctrl_context;
     req_desc = cmd->request_desc;
     /* copy the io request frame as well as 8 SGEs data for r1 command*/
     memcpy(r1_cmd->io_request, cmd->io_request,
            (sizeof(struct MPI2_RAID_SCSI_IO_REQUEST)));
     memcpy(&r1_cmd->io_request->SGL, &cmd->io_request->SGL,
            (fusion->max_sge_in_main_msg * sizeof(union MPI2_SGE_IO_UNION)));
     /*sense buffer is different for r1 command*/
     r1_cmd->io_request->SenseBufferLowAddress =
             cpu_to_le32(lower_32_bits(r1_cmd->sense_phys_addr));
     r1_cmd->scmd = cmd->scmd;
     req_desc2 = megasas_get_request_descriptor(instance,
                            (r1_cmd->index - 1));
     req_desc2->Words = 0;
     r1_cmd->request_desc = req_desc2;
     req_desc2->SCSIIO.SMID = cpu_to_le16(r1_cmd->index);
     req_desc2->SCSIIO.RequestFlags = req_desc->SCSIIO.RequestFlags;
     r1_cmd->request_desc->SCSIIO.DevHandle = cmd->r1_alt_dev_handle;
     r1_cmd->io_request->DevHandle = cmd->r1_alt_dev_handle;
     r1_cmd->r1_alt_dev_handle = cmd->io_request->DevHandle;
     cmd->io_request->RaidContext.raid_context_g35.flow_specific.peer_smid =
             cpu_to_le16(r1_cmd->index);
     r1_cmd->io_request->RaidContext.raid_context_g35.flow_specific.peer_smid =
             cpu_to_le16(cmd->index);
     /*MSIxIndex of both commands request descriptors should be same*/
     r1_cmd->request_desc->SCSIIO.MSIxIndex =
             cmd->request_desc->SCSIIO.MSIxIndex;
     /*span arm is different for r1 cmd*/
     r1_cmd->io_request->RaidContext.raid_context_g35.span_arm =
             cmd->io_request->RaidContext.raid_context_g35.span_arm + 1;
 }
 
 /**
  * megasas_build_and_issue_cmd_fusion -Main routine for building and
  *                                     issuing non IOCTL cmd
  * @instance:           Adapter soft state
  * @scmd:           pointer to scsi cmd from OS
  */
 static u32
 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
                    struct scsi_cmnd *scmd)
 {
     struct megasas_cmd_fusion *cmd, *r1_cmd = NULL;
     union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
     u32 index;
 
     if ((megasas_cmd_type(scmd) == READ_WRITE_LDIO) &&
         instance->ldio_threshold &&
         (atomic_inc_return(&instance->ldio_outstanding) >
         instance->ldio_threshold)) {
         atomic_dec(&instance->ldio_outstanding);
         return SCSI_MLQUEUE_DEVICE_BUSY;
     }
 
     if (atomic_inc_return(&instance->fw_outstanding) >
             instance->host->can_queue) {
         atomic_dec(&instance->fw_outstanding);
         return SCSI_MLQUEUE_HOST_BUSY;
     }
 
     cmd = megasas_get_cmd_fusion(instance, scsi_cmd_to_rq(scmd)->tag);
 
     if (!cmd) {
         atomic_dec(&instance->fw_outstanding);
         return SCSI_MLQUEUE_HOST_BUSY;
     }
 
     index = cmd->index;
 
     req_desc = megasas_get_request_descriptor(instance, index-1);
 
     req_desc->Words = 0;
     cmd->request_desc = req_desc;
 
     if (megasas_build_io_fusion(instance, scmd, cmd)) {
         megasas_return_cmd_fusion(instance, cmd);
         dev_err(&instance->pdev->dev, "Error building command\n");
         cmd->request_desc = NULL;
         atomic_dec(&instance->fw_outstanding);
         return SCSI_MLQUEUE_HOST_BUSY;
     }
 
     req_desc = cmd->request_desc;
     req_desc->SCSIIO.SMID = cpu_to_le16(index);
 
     if (cmd->io_request->ChainOffset != 0 &&
         cmd->io_request->ChainOffset != 0xF)
         dev_err(&instance->pdev->dev, "The chain offset value is not "
                "correct : %x\n", cmd->io_request->ChainOffset);
     /*
      *  if it is raid 1/10 fp write capable.
      *  try to get second command from pool and construct it.
      *  From FW, it has confirmed that lba values of two PDs
      *  corresponds to single R1/10 LD are always same
      *
      */
     /*  driver side count always should be less than max_fw_cmds
      *  to get new command
      */
     if (cmd->r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
         r1_cmd = megasas_get_cmd_fusion(instance,
                 scsi_cmd_to_rq(scmd)->tag + instance->max_fw_cmds);
         megasas_prepare_secondRaid1_IO(instance, cmd, r1_cmd);
     }
 
 
     /*
      * Issue the command to the FW
      */
 
     megasas_sdev_busy_inc(instance, scmd);
     megasas_fire_cmd_fusion(instance, req_desc);
 
     if (r1_cmd)
         megasas_fire_cmd_fusion(instance, r1_cmd->request_desc);
 
 
     return 0;
 }
 
 /**
  * megasas_complete_r1_command -
  * completes R1 FP write commands which has valid peer smid
  * @instance:           Adapter soft state
  * @cmd:            MPT command frame
  *
  */
 static inline void
 megasas_complete_r1_command(struct megasas_instance *instance,
                 struct megasas_cmd_fusion *cmd)
 {
     u8 *sense, status, ex_status;
     u32 data_length;
     u16 peer_smid;
     struct fusion_context *fusion;
     struct megasas_cmd_fusion *r1_cmd = NULL;
     struct scsi_cmnd *scmd_local = NULL;
     struct RAID_CONTEXT_G35 *rctx_g35;
 
     rctx_g35 = &cmd->io_request->RaidContext.raid_context_g35;
     fusion = instance->ctrl_context;
     peer_smid = le16_to_cpu(rctx_g35->flow_specific.peer_smid);
 
     r1_cmd = fusion->cmd_list[peer_smid - 1];
     scmd_local = cmd->scmd;
     status = rctx_g35->status;
     ex_status = rctx_g35->ex_status;
     data_length = cmd->io_request->DataLength;
     sense = cmd->sense;
 
     cmd->cmd_completed = true;
 
     /* Check if peer command is completed or not*/
     if (r1_cmd->cmd_completed) {
         rctx_g35 = &r1_cmd->io_request->RaidContext.raid_context_g35;
         if (rctx_g35->status != MFI_STAT_OK) {
             status = rctx_g35->status;
             ex_status = rctx_g35->ex_status;
             data_length = r1_cmd->io_request->DataLength;
             sense = r1_cmd->sense;
         }
 
         megasas_return_cmd_fusion(instance, r1_cmd);
         map_cmd_status(fusion, scmd_local, status, ex_status,
                    le32_to_cpu(data_length), sense);
         if (instance->ldio_threshold &&
             megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
             atomic_dec(&instance->ldio_outstanding);
         megasas_priv(scmd_local)->cmd_priv = NULL;
         megasas_return_cmd_fusion(instance, cmd);
         scsi_dma_unmap(scmd_local);
         megasas_sdev_busy_dec(instance, scmd_local);
         scsi_done(scmd_local);
     }
 }
 
 /**
  * access_irq_context:      Access to reply processing
  * @irq_context:        IRQ context
  *
  * Synchronize access to reply processing.
  *
  * Return:  true on success, false on failure.
  */
 static inline
 bool access_irq_context(struct megasas_irq_context  *irq_context)
 {
     if (!irq_context)
         return true;
 
     if (atomic_add_unless(&irq_context->in_used, 1, 1))
         return true;
 
     return false;
 }
 
 /**
  * release_irq_context:     Release reply processing
  * @irq_context:        IRQ context
  *
  * Release access of reply processing.
  *
  * Return: Nothing.
  */
 static inline
 void release_irq_context(struct megasas_irq_context  *irq_context)
 {
     if (irq_context)
         atomic_dec(&irq_context->in_used);
 }
 
 /**
  * complete_cmd_fusion -    Completes command
  * @instance:           Adapter soft state
  * @MSIxIndex:          MSI number
  * @irq_context:        IRQ context
  *
  * Completes all commands that is in reply descriptor queue
  */
 static int
 complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
             struct megasas_irq_context *irq_context)
 {
     union MPI2_REPLY_DESCRIPTORS_UNION *desc;
     struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
     struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
     struct fusion_context *fusion;
     struct megasas_cmd *cmd_mfi;
     struct megasas_cmd_fusion *cmd_fusion;
     u16 smid, num_completed;
     u8 reply_descript_type, *sense, status, extStatus;
     u32 device_id, data_length;
     union desc_value d_val;
     struct LD_LOAD_BALANCE_INFO *lbinfo;
     int threshold_reply_count = 0;
     struct scsi_cmnd *scmd_local = NULL;
     struct MR_TASK_MANAGE_REQUEST *mr_tm_req;
     struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_tm_req;
 
     fusion = instance->ctrl_context;
 
     if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
         return IRQ_HANDLED;
 
     if (!access_irq_context(irq_context))
         return 0;
 
     desc = fusion->reply_frames_desc[MSIxIndex] +
                 fusion->last_reply_idx[MSIxIndex];
 
     reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
 
     d_val.word = desc->Words;
 
     reply_descript_type = reply_desc->ReplyFlags &
         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
 
     if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED) {
         release_irq_context(irq_context);
         return IRQ_NONE;
     }
 
     num_completed = 0;
 
     while (d_val.u.low != cpu_to_le32(UINT_MAX) &&
            d_val.u.high != cpu_to_le32(UINT_MAX)) {
 
         smid = le16_to_cpu(reply_desc->SMID);
         cmd_fusion = fusion->cmd_list[smid - 1];
         scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *)
                         cmd_fusion->io_request;
 
         scmd_local = cmd_fusion->scmd;
         status = scsi_io_req->RaidContext.raid_context.status;
         extStatus = scsi_io_req->RaidContext.raid_context.ex_status;
         sense = cmd_fusion->sense;
         data_length = scsi_io_req->DataLength;
 
         switch (scsi_io_req->Function) {
         case MPI2_FUNCTION_SCSI_TASK_MGMT:
             mr_tm_req = (struct MR_TASK_MANAGE_REQUEST *)
                         cmd_fusion->io_request;
             mpi_tm_req = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *)
                         &mr_tm_req->TmRequest;
             dev_dbg(&instance->pdev->dev, "TM completion:"
                 "type: 0x%x TaskMID: 0x%x\n",
                 mpi_tm_req->TaskType, mpi_tm_req->TaskMID);
             complete(&cmd_fusion->done);
             break;
         case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
             /* Update load balancing info */
             if (fusion->load_balance_info &&
                 (megasas_priv(cmd_fusion->scmd)->status &
                 MEGASAS_LOAD_BALANCE_FLAG)) {
                 device_id = MEGASAS_DEV_INDEX(scmd_local);
                 lbinfo = &fusion->load_balance_info[device_id];
                 atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]);
                 megasas_priv(cmd_fusion->scmd)->status &=
                     ~MEGASAS_LOAD_BALANCE_FLAG;
             }
             fallthrough;    /* and complete IO */
         case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
             atomic_dec(&instance->fw_outstanding);
             if (cmd_fusion->r1_alt_dev_handle == MR_DEVHANDLE_INVALID) {
                 map_cmd_status(fusion, scmd_local, status,
                            extStatus, le32_to_cpu(data_length),
                            sense);
                 if (instance->ldio_threshold &&
                     (megasas_cmd_type(scmd_local) == READ_WRITE_LDIO))
                     atomic_dec(&instance->ldio_outstanding);
                 megasas_priv(scmd_local)->cmd_priv = NULL;
                 megasas_return_cmd_fusion(instance, cmd_fusion);
                 scsi_dma_unmap(scmd_local);
                 megasas_sdev_busy_dec(instance, scmd_local);
                 scsi_done(scmd_local);
             } else  /* Optimal VD - R1 FP command completion. */
                 megasas_complete_r1_command(instance, cmd_fusion);
             break;
         case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
             cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
             /* Poll mode. Dummy free.
              * In case of Interrupt mode, caller has reverse check.
              */
             if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) {
                 cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE;
                 megasas_return_cmd(instance, cmd_mfi);
             } else
                 megasas_complete_cmd(instance, cmd_mfi, DID_OK);
             break;
         }
 
         fusion->last_reply_idx[MSIxIndex]++;
         if (fusion->last_reply_idx[MSIxIndex] >=
             fusion->reply_q_depth)
             fusion->last_reply_idx[MSIxIndex] = 0;
 
         desc->Words = cpu_to_le64(ULLONG_MAX);
         num_completed++;
         threshold_reply_count++;
 
         /* Get the next reply descriptor */
         if (!fusion->last_reply_idx[MSIxIndex])
             desc = fusion->reply_frames_desc[MSIxIndex];
         else
             desc++;
 
         reply_desc =
           (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
 
         d_val.word = desc->Words;
 
         reply_descript_type = reply_desc->ReplyFlags &
             MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
 
         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
             break;
         /*
          * Write to reply post host index register after completing threshold
          * number of reply counts and still there are more replies in reply queue
          * pending to be completed
          */
         if (threshold_reply_count >= instance->threshold_reply_count) {
             if (instance->msix_combined)
                 writel(((MSIxIndex & 0x7) << 24) |
                     fusion->last_reply_idx[MSIxIndex],
                     instance->reply_post_host_index_addr[MSIxIndex/8]);
             else
                 writel((MSIxIndex << 24) |
                     fusion->last_reply_idx[MSIxIndex],
                     instance->reply_post_host_index_addr[0]);
             threshold_reply_count = 0;
             if (irq_context) {
                 if (!irq_context->irq_poll_scheduled) {
                     irq_context->irq_poll_scheduled = true;
                     irq_context->irq_line_enable = true;
                     irq_poll_sched(&irq_context->irqpoll);
                 }
                 release_irq_context(irq_context);
                 return num_completed;
             }
         }
     }
 
     if (num_completed) {
         wmb();
         if (instance->msix_combined)
             writel(((MSIxIndex & 0x7) << 24) |
                 fusion->last_reply_idx[MSIxIndex],
                 instance->reply_post_host_index_addr[MSIxIndex/8]);
         else
             writel((MSIxIndex << 24) |
                 fusion->last_reply_idx[MSIxIndex],
                 instance->reply_post_host_index_addr[0]);
         megasas_check_and_restore_queue_depth(instance);
     }
 
     release_irq_context(irq_context);
 
     return num_completed;
 }
 
 int megasas_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
 {
 
     struct megasas_instance *instance;
     int num_entries = 0;
     struct fusion_context *fusion;
 
     instance = (struct megasas_instance *)shost->hostdata;
 
     fusion = instance->ctrl_context;
 
     queue_num = queue_num + instance->low_latency_index_start;
 
     if (!atomic_add_unless(&fusion->busy_mq_poll[queue_num], 1, 1))
         return 0;
 
     num_entries = complete_cmd_fusion(instance, queue_num, NULL);
     atomic_dec(&fusion->busy_mq_poll[queue_num]);
 
     return num_entries;
 }
 
 /**
  * megasas_enable_irq_poll() - enable irqpoll
  * @instance:           Adapter soft state
  */
 static void megasas_enable_irq_poll(struct megasas_instance *instance)
 {
     u32 count, i;
     struct megasas_irq_context *irq_ctx;
 
     count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 
     for (i = 0; i < count; i++) {
         irq_ctx = &instance->irq_context[i];
         irq_poll_enable(&irq_ctx->irqpoll);
     }
 }
 
 /**
  * megasas_sync_irqs -  Synchronizes all IRQs owned by adapter
  * @instance_addr:          Adapter soft state address
  */
 static void megasas_sync_irqs(unsigned long instance_addr)
 {
     u32 count, i;
     struct megasas_instance *instance =
         (struct megasas_instance *)instance_addr;
     struct megasas_irq_context *irq_ctx;
 
     count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 
     for (i = 0; i < count; i++) {
         synchronize_irq(pci_irq_vector(instance->pdev, i));
         irq_ctx = &instance->irq_context[i];
         irq_poll_disable(&irq_ctx->irqpoll);
         if (irq_ctx->irq_poll_scheduled) {
             irq_ctx->irq_poll_scheduled = false;
             enable_irq(irq_ctx->os_irq);
             complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx);
         }
     }
 }
 
 /**
  * megasas_irqpoll() - process a queue for completed reply descriptors
  * @irqpoll:    IRQ poll structure associated with queue to poll.
  * @budget: Threshold of reply descriptors to process per poll.
  *
  * Return: The number of entries processed.
  */
 
 int megasas_irqpoll(struct irq_poll *irqpoll, int budget)
 {
     struct megasas_irq_context *irq_ctx;
     struct megasas_instance *instance;
     int num_entries;
 
     irq_ctx = container_of(irqpoll, struct megasas_irq_context, irqpoll);
     instance = irq_ctx->instance;
 
     if (irq_ctx->irq_line_enable) {
         disable_irq_nosync(irq_ctx->os_irq);
         irq_ctx->irq_line_enable = false;
     }
 
     num_entries = complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx);
     if (num_entries < budget) {
         irq_poll_complete(irqpoll);
         irq_ctx->irq_poll_scheduled = false;
         enable_irq(irq_ctx->os_irq);
         complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx);
     }
 
     return num_entries;
 }
 
 /**
  * megasas_complete_cmd_dpc_fusion -    Completes command
  * @instance_addr:          Adapter soft state address
  *
  * Tasklet to complete cmds
  */
 static void
 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
 {
     struct megasas_instance *instance =
         (struct megasas_instance *)instance_addr;
     struct megasas_irq_context *irq_ctx = NULL;
     u32 count, MSIxIndex;
 
     count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 
     /* If we have already declared adapter dead, donot complete cmds */
     if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
         return;
 
     for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++) {
         irq_ctx = &instance->irq_context[MSIxIndex];
         complete_cmd_fusion(instance, MSIxIndex, irq_ctx);
     }
 }
 
 /**
  * megasas_isr_fusion - isr entry point
  * @irq:    IRQ number
  * @devp:   IRQ context
  */
 static irqreturn_t megasas_isr_fusion(int irq, void *devp)
 {
     struct megasas_irq_context *irq_context = devp;
     struct megasas_instance *instance = irq_context->instance;
     u32 mfiStatus;
 
     if (instance->mask_interrupts)
         return IRQ_NONE;
 
     if (irq_context->irq_poll_scheduled)
         return IRQ_HANDLED;
 
     if (!instance->msix_vectors) {
         mfiStatus = instance->instancet->clear_intr(instance);
         if (!mfiStatus)
             return IRQ_NONE;
     }
 
     /* If we are resetting, bail */
     if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
         instance->instancet->clear_intr(instance);
         return IRQ_HANDLED;
     }
 
     return complete_cmd_fusion(instance, irq_context->MSIxIndex, irq_context)
             ? IRQ_HANDLED : IRQ_NONE;
 }
 
 /**
  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
  * @instance:           Adapter soft state
  * @mfi_cmd:            megasas_cmd pointer
  *
  */
 static void
 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
             struct megasas_cmd *mfi_cmd)
 {
     struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
     struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
     struct megasas_cmd_fusion *cmd;
     struct fusion_context *fusion;
     struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
 
     fusion = instance->ctrl_context;
 
     cmd = megasas_get_cmd_fusion(instance,
             instance->max_scsi_cmds + mfi_cmd->index);
 
     /*  Save the smid. To be used for returning the cmd */
     mfi_cmd->context.smid = cmd->index;
 
     /*
      * For cmds where the flag is set, store the flag and check
      * on completion. For cmds with this flag, don't call
      * megasas_complete_cmd
      */
 
     if (frame_hdr->flags & cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE))
         mfi_cmd->flags |= DRV_DCMD_POLLED_MODE;
 
     io_req = cmd->io_request;
 
     if (instance->adapter_type >= INVADER_SERIES) {
         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
             (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
         sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
         sgl_ptr_end->Flags = 0;
     }
 
     mpi25_ieee_chain =
       (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
 
     io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
     io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
                        SGL) / 4;
     io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
 
     mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr);
 
     mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
         MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
 
     mpi25_ieee_chain->Length = cpu_to_le32(instance->mfi_frame_size);
 }
 
 /**
  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
  * @instance:           Adapter soft state
  * @cmd:            mfi cmd to build
  *
  */
 static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
 {
     union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc = NULL;
     u16 index;
 
     build_mpt_mfi_pass_thru(instance, cmd);
     index = cmd->context.smid;
 
     req_desc = megasas_get_request_descriptor(instance, index - 1);
 
     req_desc->Words = 0;
     req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
                      MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 
     req_desc->SCSIIO.SMID = cpu_to_le16(index);
 
     return req_desc;
 }
 
 /**
  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
  * @instance:           Adapter soft state
  * @cmd:            mfi cmd pointer
  *
  */
 static void
 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
               struct megasas_cmd *cmd)
 {
     union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
 
     req_desc = build_mpt_cmd(instance, cmd);
 
     megasas_fire_cmd_fusion(instance, req_desc);
     return;
 }
 
 /**
  * megasas_release_fusion - Reverses the FW initialization
  * @instance:           Adapter soft state
  */
 void
 megasas_release_fusion(struct megasas_instance *instance)
 {
     megasas_free_ioc_init_cmd(instance);
     megasas_free_cmds(instance);
     megasas_free_cmds_fusion(instance);
 
     iounmap(instance->reg_set);
 
     pci_release_selected_regions(instance->pdev, 1<<instance->bar);
 }
 
 /**
  * megasas_read_fw_status_reg_fusion - returns the current FW status value
  * @instance:           Adapter soft state
  */
 static u32
 megasas_read_fw_status_reg_fusion(struct megasas_instance *instance)
 {
     return megasas_readl(instance, &instance->reg_set->outbound_scratch_pad_0);
 }
 
 /**
  * megasas_alloc_host_crash_buffer -    Host buffers for Crash dump collection from Firmware
  * @instance:               Controller's soft instance
  * @return:                 Number of allocated host crash buffers
  */
 static void
 megasas_alloc_host_crash_buffer(struct megasas_instance *instance)
 {
     unsigned int i;
 
     for (i = 0; i < MAX_CRASH_DUMP_SIZE; i++) {
         instance->crash_buf[i] = vzalloc(CRASH_DMA_BUF_SIZE);
         if (!instance->crash_buf[i]) {
             dev_info(&instance->pdev->dev, "Firmware crash dump "
                 "memory allocation failed at index %d\n", i);
             break;
         }
     }
     instance->drv_buf_alloc = i;
 }
 
 /**
  * megasas_free_host_crash_buffer - Host buffers for Crash dump collection from Firmware
  * @instance:               Controller's soft instance
  */
 void
 megasas_free_host_crash_buffer(struct megasas_instance *instance)
 {
     unsigned int i;
     for (i = 0; i < instance->drv_buf_alloc; i++) {
         vfree(instance->crash_buf[i]);
     }
     instance->drv_buf_index = 0;
     instance->drv_buf_alloc = 0;
     instance->fw_crash_state = UNAVAILABLE;
     instance->fw_crash_buffer_size = 0;
 }
 
 /**
  * megasas_adp_reset_fusion -   For controller reset
  * @instance:               Controller's soft instance
  * @regs:               MFI register set
  */
 static int
 megasas_adp_reset_fusion(struct megasas_instance *instance,
              struct megasas_register_set __iomem *regs)
 {
     u32 host_diag, abs_state, retry;
 
     /* Now try to reset the chip */
     writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
     writel(MPI2_WRSEQ_1ST_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
     writel(MPI2_WRSEQ_2ND_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
     writel(MPI2_WRSEQ_3RD_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
     writel(MPI2_WRSEQ_4TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
     writel(MPI2_WRSEQ_5TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
     writel(MPI2_WRSEQ_6TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
 
     /* Check that the diag write enable (DRWE) bit is on */
     host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag);
     retry = 0;
     while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
         msleep(100);
         host_diag = megasas_readl(instance,
                       &instance->reg_set->fusion_host_diag);
         if (retry++ == 100) {
             dev_warn(&instance->pdev->dev,
                 "Host diag unlock failed from %s %d\n",
                 __func__, __LINE__);
             break;
         }
     }
     if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
         return -1;
 
     /* Send chip reset command */
     writel(host_diag | HOST_DIAG_RESET_ADAPTER,
         &instance->reg_set->fusion_host_diag);
     msleep(3000);
 
     /* Make sure reset adapter bit is cleared */
     host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag);
     retry = 0;
     while (host_diag & HOST_DIAG_RESET_ADAPTER) {
         msleep(100);
         host_diag = megasas_readl(instance,
                       &instance->reg_set->fusion_host_diag);
         if (retry++ == 1000) {
             dev_warn(&instance->pdev->dev,
                 "Diag reset adapter never cleared %s %d\n",
                 __func__, __LINE__);
             break;
         }
     }
     if (host_diag & HOST_DIAG_RESET_ADAPTER)
         return -1;
 
     abs_state = instance->instancet->read_fw_status_reg(instance)
             & MFI_STATE_MASK;
     retry = 0;
 
     while ((abs_state <= MFI_STATE_FW_INIT) && (retry++ < 1000)) {
         msleep(100);
         abs_state = instance->instancet->
             read_fw_status_reg(instance) & MFI_STATE_MASK;
     }
     if (abs_state <= MFI_STATE_FW_INIT) {
         dev_warn(&instance->pdev->dev,
             "fw state < MFI_STATE_FW_INIT, state = 0x%x %s %d\n",
             abs_state, __func__, __LINE__);
         return -1;
     }
 
     return 0;
 }
 
 /**
  * megasas_check_reset_fusion - For controller reset check
  * @instance:               Controller's soft instance
  * @regs:               MFI register set
  */
 static int
 megasas_check_reset_fusion(struct megasas_instance *instance,
                struct megasas_register_set __iomem *regs)
 {
     return 0;
 }
 
 /**
  * megasas_trigger_snap_dump -  Trigger snap dump in FW
  * @instance:           Soft instance of adapter
  */
 static inline void megasas_trigger_snap_dump(struct megasas_instance *instance)
 {
     int j;
     u32 fw_state, abs_state;
 
     if (!instance->disableOnlineCtrlReset) {
         dev_info(&instance->pdev->dev, "Trigger snap dump\n");
         writel(MFI_ADP_TRIGGER_SNAP_DUMP,
                &instance->reg_set->doorbell);
         readl(&instance->reg_set->doorbell);
     }
 
     for (j = 0; j < instance->snapdump_wait_time; j++) {
         abs_state = instance->instancet->read_fw_status_reg(instance);
         fw_state = abs_state & MFI_STATE_MASK;
         if (fw_state == MFI_STATE_FAULT) {
             dev_printk(KERN_ERR, &instance->pdev->dev,
                    "FW in FAULT state Fault code:0x%x subcode:0x%x func:%s\n",
                    abs_state & MFI_STATE_FAULT_CODE,
                    abs_state & MFI_STATE_FAULT_SUBCODE, __func__);
             return;
         }
         msleep(1000);
     }
 }
 
 /* This function waits for outstanding commands on fusion to complete */
 static int
 megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
                     int reason, int *convert)
 {
     int i, outstanding, retval = 0, hb_seconds_missed = 0;
     u32 fw_state, abs_state;
     u32 waittime_for_io_completion;
 
     waittime_for_io_completion =
         min_t(u32, resetwaittime,
             (resetwaittime - instance->snapdump_wait_time));
 
     if (reason == MFI_IO_TIMEOUT_OCR) {
         dev_info(&instance->pdev->dev,
             "MFI command is timed out\n");
         megasas_complete_cmd_dpc_fusion((unsigned long)instance);
         if (instance->snapdump_wait_time)
             megasas_trigger_snap_dump(instance);
         retval = 1;
         goto out;
     }
 
     for (i = 0; i < waittime_for_io_completion; i++) {
         /* Check if firmware is in fault state */
         abs_state = instance->instancet->read_fw_status_reg(instance);
         fw_state = abs_state & MFI_STATE_MASK;
         if (fw_state == MFI_STATE_FAULT) {
             dev_printk(KERN_ERR, &instance->pdev->dev,
                    "FW in FAULT state Fault code:0x%x subcode:0x%x func:%s\n",
                    abs_state & MFI_STATE_FAULT_CODE,
                    abs_state & MFI_STATE_FAULT_SUBCODE, __func__);
             megasas_complete_cmd_dpc_fusion((unsigned long)instance);
             if (instance->requestorId && reason) {
                 dev_warn(&instance->pdev->dev, "SR-IOV Found FW in FAULT"
                 " state while polling during"
                 " I/O timeout handling for %d\n",
                 instance->host->host_no);
                 *convert = 1;
             }
 
             retval = 1;
             goto out;
         }
 
 
         /* If SR-IOV VF mode & heartbeat timeout, don't wait */
         if (instance->requestorId && !reason) {
             retval = 1;
             goto out;
         }
 
         /* If SR-IOV VF mode & I/O timeout, check for HB timeout */
         if (instance->requestorId && (reason == SCSIIO_TIMEOUT_OCR)) {
             if (instance->hb_host_mem->HB.fwCounter !=
                 instance->hb_host_mem->HB.driverCounter) {
                 instance->hb_host_mem->HB.driverCounter =
                     instance->hb_host_mem->HB.fwCounter;
                 hb_seconds_missed = 0;
             } else {
                 hb_seconds_missed++;
                 if (hb_seconds_missed ==
                     (MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF/HZ)) {
                     dev_warn(&instance->pdev->dev, "SR-IOV:"
                            " Heartbeat never completed "
                            " while polling during I/O "
                            " timeout handling for "
                            "scsi%d.\n",
                            instance->host->host_no);
                            *convert = 1;
                            retval = 1;
                            goto out;
                 }
             }
         }
 
         megasas_complete_cmd_dpc_fusion((unsigned long)instance);
         outstanding = atomic_read(&instance->fw_outstanding);
         if (!outstanding)
             goto out;
 
         if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
             dev_notice(&instance->pdev->dev, "[%2d]waiting for %d "
                    "commands to complete for scsi%d\n", i,
                    outstanding, instance->host->host_no);
         }
         msleep(1000);
     }
 
     if (instance->snapdump_wait_time) {
         megasas_trigger_snap_dump(instance);
         retval = 1;
         goto out;
     }
 
     if (atomic_read(&instance->fw_outstanding)) {
         dev_err(&instance->pdev->dev, "pending commands remain after waiting, "
                "will reset adapter scsi%d.\n",
                instance->host->host_no);
         *convert = 1;
         retval = 1;
     }
 
 out:
     return retval;
 }
 
 void  megasas_reset_reply_desc(struct megasas_instance *instance)
 {
     int i, j, count;
     struct fusion_context *fusion;
     union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 
     fusion = instance->ctrl_context;
     count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
     count += instance->iopoll_q_count;
 
     for (i = 0 ; i < count ; i++) {
         fusion->last_reply_idx[i] = 0;
         reply_desc = fusion->reply_frames_desc[i];
         for (j = 0 ; j < fusion->reply_q_depth; j++, reply_desc++)
             reply_desc->Words = cpu_to_le64(ULLONG_MAX);
     }
 }
 
 /*
  * megasas_refire_mgmt_cmd :    Re-fire management commands
  * @instance:               Controller's soft instance
 */
 static void megasas_refire_mgmt_cmd(struct megasas_instance *instance,
                  bool return_ioctl)
 {
     int j;
     struct megasas_cmd_fusion *cmd_fusion;
     struct fusion_context *fusion;
     struct megasas_cmd *cmd_mfi;
     union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
     struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
     u16 smid;
     bool refire_cmd = false;
     u8 result;
     u32 opcode = 0;
 
     fusion = instance->ctrl_context;
 
     /* Re-fire management commands.
      * Do not traverse complet MPT frame pool. Start from max_scsi_cmds.
      */
     for (j = instance->max_scsi_cmds ; j < instance->max_fw_cmds; j++) {
         cmd_fusion = fusion->cmd_list[j];
         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
         smid = le16_to_cpu(cmd_mfi->context.smid);
         result = REFIRE_CMD;
 
         if (!smid)
             continue;
 
         req_desc = megasas_get_request_descriptor(instance, smid - 1);
 
         switch (cmd_mfi->frame->hdr.cmd) {
         case MFI_CMD_DCMD:
             opcode = le32_to_cpu(cmd_mfi->frame->dcmd.opcode);
              /* Do not refire shutdown command */
             if (opcode == MR_DCMD_CTRL_SHUTDOWN) {
                 cmd_mfi->frame->dcmd.cmd_status = MFI_STAT_OK;
                 result = COMPLETE_CMD;
                 break;
             }
 
             refire_cmd = ((opcode != MR_DCMD_LD_MAP_GET_INFO)) &&
                       (opcode != MR_DCMD_SYSTEM_PD_MAP_GET_INFO) &&
                       !(cmd_mfi->flags & DRV_DCMD_SKIP_REFIRE);
 
             if (!refire_cmd)
                 result = RETURN_CMD;
 
             break;
         case MFI_CMD_NVME:
             if (!instance->support_nvme_passthru) {
                 cmd_mfi->frame->hdr.cmd_status = MFI_STAT_INVALID_CMD;
                 result = COMPLETE_CMD;
             }
 
             break;
         case MFI_CMD_TOOLBOX:
             if (!instance->support_pci_lane_margining) {
                 cmd_mfi->frame->hdr.cmd_status = MFI_STAT_INVALID_CMD;
                 result = COMPLETE_CMD;
             }
 
             break;
         default:
             break;
         }
 
         if (return_ioctl && cmd_mfi->sync_cmd &&
             cmd_mfi->frame->hdr.cmd != MFI_CMD_ABORT) {
             dev_err(&instance->pdev->dev,
                 "return -EBUSY from %s %d cmd 0x%x opcode 0x%x\n",
                 __func__, __LINE__, cmd_mfi->frame->hdr.cmd,
                 le32_to_cpu(cmd_mfi->frame->dcmd.opcode));
             cmd_mfi->cmd_status_drv = DCMD_BUSY;
             result = COMPLETE_CMD;
         }
 
         scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *)
                 cmd_fusion->io_request;
         if (scsi_io_req->Function == MPI2_FUNCTION_SCSI_TASK_MGMT)
             result = RETURN_CMD;
 
         switch (result) {
         case REFIRE_CMD:
             megasas_fire_cmd_fusion(instance, req_desc);
             break;
         case RETURN_CMD:
             megasas_return_cmd(instance, cmd_mfi);
             break;
         case COMPLETE_CMD:
             megasas_complete_cmd(instance, cmd_mfi, DID_OK);
             break;
         }
     }
 }
 
 /*
  * megasas_return_polled_cmds: Return polled mode commands back to the pool
  *                 before initiating an OCR.
  * @instance:                  Controller's soft instance
  */
 static void
 megasas_return_polled_cmds(struct megasas_instance *instance)
 {
     int i;
     struct megasas_cmd_fusion *cmd_fusion;
     struct fusion_context *fusion;
     struct megasas_cmd *cmd_mfi;
 
     fusion = instance->ctrl_context;
 
     for (i = instance->max_scsi_cmds; i < instance->max_fw_cmds; i++) {
         cmd_fusion = fusion->cmd_list[i];
         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
 
         if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) {
             if (megasas_dbg_lvl & OCR_DEBUG)
                 dev_info(&instance->pdev->dev,
                      "%s %d return cmd 0x%x opcode 0x%x\n",
                      __func__, __LINE__, cmd_mfi->frame->hdr.cmd,
                      le32_to_cpu(cmd_mfi->frame->dcmd.opcode));
             cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE;
             megasas_return_cmd(instance, cmd_mfi);
         }
     }
 }
 
 /*
  * megasas_track_scsiio : Track SCSI IOs outstanding to a SCSI device
  * @instance: per adapter struct
  * @channel: the channel assigned by the OS
  * @id: the id assigned by the OS
  *
  * Returns SUCCESS if no IOs pending to SCSI device, else return FAILED
  */
 
 static int megasas_track_scsiio(struct megasas_instance *instance,
         int id, int channel)
 {
     int i, found = 0;
     struct megasas_cmd_fusion *cmd_fusion;
     struct fusion_context *fusion;
     fusion = instance->ctrl_context;
 
     for (i = 0 ; i < instance->max_scsi_cmds; i++) {
         cmd_fusion = fusion->cmd_list[i];
         if (cmd_fusion->scmd &&
             (cmd_fusion->scmd->device->id == id &&
             cmd_fusion->scmd->device->channel == channel)) {
             dev_info(&instance->pdev->dev,
                 "SCSI commands pending to target"
                 "channel %d id %d \tSMID: 0x%x\n",
                 channel, id, cmd_fusion->index);
             scsi_print_command(cmd_fusion->scmd);
             found = 1;
             break;
         }
     }
 
     return found ? FAILED : SUCCESS;
 }
 
 /**
  * megasas_tm_response_code - translation of device response code
  * @instance:   Controller's soft instance
  * @mpi_reply:  MPI reply returned by firmware
  *
  * Return nothing.
  */
 static void
 megasas_tm_response_code(struct megasas_instance *instance,
         struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply)
 {
     char *desc;
 
     switch (mpi_reply->ResponseCode) {
     case MPI2_SCSITASKMGMT_RSP_TM_COMPLETE:
         desc = "task management request completed";
         break;
     case MPI2_SCSITASKMGMT_RSP_INVALID_FRAME:
         desc = "invalid frame";
         break;
     case MPI2_SCSITASKMGMT_RSP_TM_NOT_SUPPORTED:
         desc = "task management request not supported";
         break;
     case MPI2_SCSITASKMGMT_RSP_TM_FAILED:
         desc = "task management request failed";
         break;
     case MPI2_SCSITASKMGMT_RSP_TM_SUCCEEDED:
         desc = "task management request succeeded";
         break;
     case MPI2_SCSITASKMGMT_RSP_TM_INVALID_LUN:
         desc = "invalid lun";
         break;
     case 0xA:
         desc = "overlapped tag attempted";
         break;
     case MPI2_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC:
         desc = "task queued, however not sent to target";
         break;
     default:
         desc = "unknown";
         break;
     }
     dev_dbg(&instance->pdev->dev, "response_code(%01x): %s\n",
         mpi_reply->ResponseCode, desc);
     dev_dbg(&instance->pdev->dev,
         "TerminationCount/DevHandle/Function/TaskType/IOCStat/IOCLoginfo"
         " 0x%x/0x%x/0x%x/0x%x/0x%x/0x%x\n",
         mpi_reply->TerminationCount, mpi_reply->DevHandle,
         mpi_reply->Function, mpi_reply->TaskType,
         mpi_reply->IOCStatus, mpi_reply->IOCLogInfo);
 }
 
 /**
  * megasas_issue_tm - main routine for sending tm requests
  * @instance: per adapter struct
  * @device_handle: device handle
  * @channel: the channel assigned by the OS
  * @id: the id assigned by the OS
  * @smid_task: smid assigned to the task
  * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in megaraid_sas_fusion.c)
  * @mr_device_priv_data: private data
  * Context: user
  *
  * MegaRaid use MPT interface for Task Magement request.
  * A generic API for sending task management requests to firmware.
  *
  * Return SUCCESS or FAILED.
  */
 static int
 megasas_issue_tm(struct megasas_instance *instance, u16 device_handle,
     uint channel, uint id, u16 smid_task, u8 type,
     struct MR_PRIV_DEVICE *mr_device_priv_data)
 {
     struct MR_TASK_MANAGE_REQUEST *mr_request;
     struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_request;
     unsigned long timeleft;
     struct megasas_cmd_fusion *cmd_fusion;
     struct megasas_cmd *cmd_mfi;
     union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
     struct fusion_context *fusion = NULL;
     struct megasas_cmd_fusion *scsi_lookup;
     int rc;
     int timeout = MEGASAS_DEFAULT_TM_TIMEOUT;
     struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply;
 
     fusion = instance->ctrl_context;
 
     cmd_mfi = megasas_get_cmd(instance);
 
     if (!cmd_mfi) {
         dev_err(&instance->pdev->dev, "Failed from %s %d\n",
             __func__, __LINE__);
         return -ENOMEM;
     }
 
     cmd_fusion = megasas_get_cmd_fusion(instance,
             instance->max_scsi_cmds + cmd_mfi->index);
 
     /*  Save the smid. To be used for returning the cmd */
     cmd_mfi->context.smid = cmd_fusion->index;
 
     req_desc = megasas_get_request_descriptor(instance,
             (cmd_fusion->index - 1));
 
     cmd_fusion->request_desc = req_desc;
     req_desc->Words = 0;
 
     mr_request = (struct MR_TASK_MANAGE_REQUEST *) cmd_fusion->io_request;
     memset(mr_request, 0, sizeof(struct MR_TASK_MANAGE_REQUEST));
     mpi_request = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *) &mr_request->TmRequest;
     mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
     mpi_request->DevHandle = cpu_to_le16(device_handle);
     mpi_request->TaskType = type;
     mpi_request->TaskMID = cpu_to_le16(smid_task);
     mpi_request->LUN[1] = 0;
 
 
     req_desc = cmd_fusion->request_desc;
     req_desc->HighPriority.SMID = cpu_to_le16(cmd_fusion->index);
     req_desc->HighPriority.RequestFlags =
         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
     req_desc->HighPriority.MSIxIndex =  0;
     req_desc->HighPriority.LMID = 0;
     req_desc->HighPriority.Reserved1 = 0;
 
     if (channel < MEGASAS_MAX_PD_CHANNELS)
         mr_request->tmReqFlags.isTMForPD = 1;
     else
         mr_request->tmReqFlags.isTMForLD = 1;
 
     init_completion(&cmd_fusion->done);
     megasas_fire_cmd_fusion(instance, req_desc);
 
     switch (type) {
     case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
         timeout = mr_device_priv_data->task_abort_tmo;
         break;
     case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
         timeout = mr_device_priv_data->target_reset_tmo;
         break;
     }
 
     timeleft = wait_for_completion_timeout(&cmd_fusion->done, timeout * HZ);
 
     if (!timeleft) {
         dev_err(&instance->pdev->dev,
             "task mgmt type 0x%x timed out\n", type);
         mutex_unlock(&instance->reset_mutex);
         rc = megasas_reset_fusion(instance->host, MFI_IO_TIMEOUT_OCR);
         mutex_lock(&instance->reset_mutex);
         return rc;
     }
 
     mpi_reply = (struct MPI2_SCSI_TASK_MANAGE_REPLY *) &mr_request->TMReply;
     megasas_tm_response_code(instance, mpi_reply);
 
     megasas_return_cmd(instance, cmd_mfi);
     rc = SUCCESS;
     switch (type) {
     case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
         scsi_lookup = fusion->cmd_list[smid_task - 1];
 
         if (scsi_lookup->scmd == NULL)
             break;
         else {
             instance->instancet->disable_intr(instance);
             megasas_sync_irqs((unsigned long)instance);
             instance->instancet->enable_intr(instance);
             megasas_enable_irq_poll(instance);
             if (scsi_lookup->scmd == NULL)
                 break;
         }
         rc = FAILED;
         break;
 
     case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
         if ((channel == 0xFFFFFFFF) && (id == 0xFFFFFFFF))
             break;
         instance->instancet->disable_intr(instance);
         megasas_sync_irqs((unsigned long)instance);
         rc = megasas_track_scsiio(instance, id, channel);
         instance->instancet->enable_intr(instance);
         megasas_enable_irq_poll(instance);
 
         break;
     case MPI2_SCSITASKMGMT_TASKTYPE_ABRT_TASK_SET:
     case MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK:
         break;
     default:
         rc = FAILED;
         break;
     }
 
     return rc;
 
 }
 
 /*
  * megasas_fusion_smid_lookup : Look for fusion command correpspodning to SCSI
  * @instance: per adapter struct
  *
  * Return Non Zero index, if SMID found in outstanding commands
  */
 static u16 megasas_fusion_smid_lookup(struct scsi_cmnd *scmd)
 {
     int i, ret = 0;
     struct megasas_instance *instance;
     struct megasas_cmd_fusion *cmd_fusion;
     struct fusion_context *fusion;
 
     instance = (struct megasas_instance *)scmd->device->host->hostdata;
 
     fusion = instance->ctrl_context;
 
     for (i = 0; i < instance->max_scsi_cmds; i++) {
         cmd_fusion = fusion->cmd_list[i];
         if (cmd_fusion->scmd && (cmd_fusion->scmd == scmd)) {
             scmd_printk(KERN_NOTICE, scmd, "Abort request is for"
                 " SMID: %d\n", cmd_fusion->index);
             ret = cmd_fusion->index;
             break;
         }
     }
 
     return ret;
 }
 
 /*
 * megasas_get_tm_devhandle - Get devhandle for TM request
 * @sdev-             OS provided scsi device
 *
 * Returns-           devhandle/targetID of SCSI device
 */
 static u16 megasas_get_tm_devhandle(struct scsi_device *sdev)
 {
     u16 pd_index = 0;
     u32 device_id;
     struct megasas_instance *instance;
     struct fusion_context *fusion;
     struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
     u16 devhandle = (u16)ULONG_MAX;
 
     instance = (struct megasas_instance *)sdev->host->hostdata;
     fusion = instance->ctrl_context;
 
     if (!MEGASAS_IS_LOGICAL(sdev)) {
         if (instance->use_seqnum_jbod_fp) {
             pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
                     + sdev->id;
             pd_sync = (void *)fusion->pd_seq_sync
                     [(instance->pd_seq_map_id - 1) & 1];
             devhandle = pd_sync->seq[pd_index].devHandle;
         } else
             sdev_printk(KERN_ERR, sdev, "Firmware expose tmCapable"
                 " without JBOD MAP support from %s %d\n", __func__, __LINE__);
     } else {
         device_id = ((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL)
                 + sdev->id;
         devhandle = device_id;
     }
 
     return devhandle;
 }
 
 /*
  * megasas_task_abort_fusion : SCSI task abort function for fusion adapters
  * @scmd : pointer to scsi command object
  *
  * Return SUCCESS, if command aborted else FAILED
  */
 
 int megasas_task_abort_fusion(struct scsi_cmnd *scmd)
 {
     struct megasas_instance *instance;
     u16 smid, devhandle;
     int ret;
     struct MR_PRIV_DEVICE *mr_device_priv_data;
     mr_device_priv_data = scmd->device->hostdata;
 
     instance = (struct megasas_instance *)scmd->device->host->hostdata;
 
     if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
         dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL,"
         "SCSI host:%d\n", instance->host->host_no);
         ret = FAILED;
         return ret;
     }
 
     if (!mr_device_priv_data) {
         sdev_printk(KERN_INFO, scmd->device, "device been deleted! "
             "scmd(%p)\n", scmd);
         scmd->result = DID_NO_CONNECT << 16;
         ret = SUCCESS;
         goto out;
     }
 
     if (!mr_device_priv_data->is_tm_capable) {
         ret = FAILED;
         goto out;
     }
 
     mutex_lock(&instance->reset_mutex);
 
     smid = megasas_fusion_smid_lookup(scmd);
 
     if (!smid) {
         ret = SUCCESS;
         scmd_printk(KERN_NOTICE, scmd, "Command for which abort is"
             " issued is not found in outstanding commands\n");
         mutex_unlock(&instance->reset_mutex);
         goto out;
     }
 
     devhandle = megasas_get_tm_devhandle(scmd->device);
 
     if (devhandle == (u16)ULONG_MAX) {
         ret = SUCCESS;
         sdev_printk(KERN_INFO, scmd->device,
             "task abort issued for invalid devhandle\n");
         mutex_unlock(&instance->reset_mutex);
         goto out;
     }
     sdev_printk(KERN_INFO, scmd->device,
         "attempting task abort! scmd(0x%p) tm_dev_handle 0x%x\n",
         scmd, devhandle);
 
     mr_device_priv_data->tm_busy = true;
     ret = megasas_issue_tm(instance, devhandle,
             scmd->device->channel, scmd->device->id, smid,
             MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK,
             mr_device_priv_data);
     mr_device_priv_data->tm_busy = false;
 
     mutex_unlock(&instance->reset_mutex);
     scmd_printk(KERN_INFO, scmd, "task abort %s!! scmd(0x%p)\n",
             ((ret == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);
 out:
     scsi_print_command(scmd);
     if (megasas_dbg_lvl & TM_DEBUG)
         megasas_dump_fusion_io(scmd);
 
     return ret;
 }
 
 /*
  * megasas_reset_target_fusion : target reset function for fusion adapters
  * scmd: SCSI command pointer
  *
  * Returns SUCCESS if all commands associated with target aborted else FAILED
  */
 
 int megasas_reset_target_fusion(struct scsi_cmnd *scmd)
 {
 
     struct megasas_instance *instance;
     int ret = FAILED;
     u16 devhandle;
     struct MR_PRIV_DEVICE *mr_device_priv_data;
     mr_device_priv_data = scmd->device->hostdata;
 
     instance = (struct megasas_instance *)scmd->device->host->hostdata;
 
     if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
         dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL,"
         "SCSI host:%d\n", instance->host->host_no);
         ret = FAILED;
         return ret;
     }
 
     if (!mr_device_priv_data) {
         sdev_printk(KERN_INFO, scmd->device,
                 "device been deleted! scmd: (0x%p)\n", scmd);
         scmd->result = DID_NO_CONNECT << 16;
         ret = SUCCESS;
         goto out;
     }
 
     if (!mr_device_priv_data->is_tm_capable) {
         ret = FAILED;
         goto out;
     }
 
     mutex_lock(&instance->reset_mutex);
     devhandle = megasas_get_tm_devhandle(scmd->device);
 
     if (devhandle == (u16)ULONG_MAX) {
         ret = SUCCESS;
         sdev_printk(KERN_INFO, scmd->device,
             "target reset issued for invalid devhandle\n");
         mutex_unlock(&instance->reset_mutex);
         goto out;
     }
 
     sdev_printk(KERN_INFO, scmd->device,
         "attempting target reset! scmd(0x%p) tm_dev_handle: 0x%x\n",
         scmd, devhandle);
     mr_device_priv_data->tm_busy = true;
     ret = megasas_issue_tm(instance, devhandle,
             scmd->device->channel, scmd->device->id, 0,
             MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET,
             mr_device_priv_data);
     mr_device_priv_data->tm_busy = false;
     mutex_unlock(&instance->reset_mutex);
     scmd_printk(KERN_NOTICE, scmd, "target reset %s!!\n",
         (ret == SUCCESS) ? "SUCCESS" : "FAILED");
 
 out:
     return ret;
 }
 
 /*SRIOV get other instance in cluster if any*/
 static struct
 megasas_instance *megasas_get_peer_instance(struct megasas_instance *instance)
 {
     int i;
 
     for (i = 0; i < MAX_MGMT_ADAPTERS; i++) {
         if (megasas_mgmt_info.instance[i] &&
             (megasas_mgmt_info.instance[i] != instance) &&
              megasas_mgmt_info.instance[i]->requestorId &&
              megasas_mgmt_info.instance[i]->peerIsPresent &&
             (memcmp((megasas_mgmt_info.instance[i]->clusterId),
             instance->clusterId, MEGASAS_CLUSTER_ID_SIZE) == 0))
             return megasas_mgmt_info.instance[i];
     }
     return NULL;
 }
 
 /* Check for a second path that is currently UP */
 int megasas_check_mpio_paths(struct megasas_instance *instance,
     struct scsi_cmnd *scmd)
 {
     struct megasas_instance *peer_instance = NULL;
     int retval = (DID_REQUEUE << 16);
 
     if (instance->peerIsPresent) {
         peer_instance = megasas_get_peer_instance(instance);
         if ((peer_instance) &&
             (atomic_read(&peer_instance->adprecovery) ==
             MEGASAS_HBA_OPERATIONAL))
             retval = (DID_NO_CONNECT << 16);
     }
     return retval;
 }
 
 /* Core fusion reset function */
 int megasas_reset_fusion(struct Scsi_Host *shost, int reason)
 {
     int retval = SUCCESS, i, j, convert = 0;
     struct megasas_instance *instance;
     struct megasas_cmd_fusion *cmd_fusion, *r1_cmd;
     struct fusion_context *fusion;
     u32 abs_state, status_reg, reset_adapter, fpio_count = 0;
     u32 io_timeout_in_crash_mode = 0;
     struct scsi_cmnd *scmd_local = NULL;
     struct scsi_device *sdev;
     int ret_target_prop = DCMD_FAILED;
     bool is_target_prop = false;
     bool do_adp_reset = true;
     int max_reset_tries = MEGASAS_FUSION_MAX_RESET_TRIES;
 
     instance = (struct megasas_instance *)shost->hostdata;
     fusion = instance->ctrl_context;
 
     mutex_lock(&instance->reset_mutex);
 
     if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
         dev_warn(&instance->pdev->dev, "Hardware critical error, "
                "returning FAILED for scsi%d.\n",
             instance->host->host_no);
         mutex_unlock(&instance->reset_mutex);
         return FAILED;
     }
     status_reg = instance->instancet->read_fw_status_reg(instance);
     abs_state = status_reg & MFI_STATE_MASK;
 
     /* IO timeout detected, forcibly put FW in FAULT state */
     if (abs_state != MFI_STATE_FAULT && instance->crash_dump_buf &&
         instance->crash_dump_app_support && reason) {
         dev_info(&instance->pdev->dev, "IO/DCMD timeout is detected, "
             "forcibly FAULT Firmware\n");
         atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
         status_reg = megasas_readl(instance, &instance->reg_set->doorbell);
         writel(status_reg | MFI_STATE_FORCE_OCR,
             &instance->reg_set->doorbell);
         readl(&instance->reg_set->doorbell);
         mutex_unlock(&instance->reset_mutex);
         do {
             ssleep(3);
             io_timeout_in_crash_mode++;
             dev_dbg(&instance->pdev->dev, "waiting for [%d] "
                 "seconds for crash dump collection and OCR "
                 "to be done\n", (io_timeout_in_crash_mode * 3));
         } while ((atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) &&
             (io_timeout_in_crash_mode < 80));
 
         if (atomic_read(&instance->adprecovery) == MEGASAS_HBA_OPERATIONAL) {
             dev_info(&instance->pdev->dev, "OCR done for IO "
                 "timeout case\n");
             retval = SUCCESS;
         } else {
             dev_info(&instance->pdev->dev, "Controller is not "
                 "operational after 240 seconds wait for IO "
                 "timeout case in FW crash dump mode\n do "
                 "OCR/kill adapter\n");
             retval = megasas_reset_fusion(shost, 0);
         }
         return retval;
     }
 
     if (instance->requestorId && !instance->skip_heartbeat_timer_del)
         del_timer_sync(&instance->sriov_heartbeat_timer);
     set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
     set_bit(MEGASAS_FUSION_OCR_NOT_POSSIBLE, &instance->reset_flags);
     atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_POLLING);
     instance->instancet->disable_intr(instance);
     megasas_sync_irqs((unsigned long)instance);
 
     /* First try waiting for commands to complete */
     if (megasas_wait_for_outstanding_fusion(instance, reason,
                         &convert)) {
         atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
         dev_warn(&instance->pdev->dev, "resetting fusion "
                "adapter scsi%d.\n", instance->host->host_no);
         if (convert)
             reason = 0;
 
         if (megasas_dbg_lvl & OCR_DEBUG)
             dev_info(&instance->pdev->dev, "\nPending SCSI commands:\n");
 
         /* Now return commands back to the OS */
         for (i = 0 ; i < instance->max_scsi_cmds; i++) {
             cmd_fusion = fusion->cmd_list[i];
             /*check for extra commands issued by driver*/
             if (instance->adapter_type >= VENTURA_SERIES) {
                 r1_cmd = fusion->cmd_list[i + instance->max_fw_cmds];
                 megasas_return_cmd_fusion(instance, r1_cmd);
             }
             scmd_local = cmd_fusion->scmd;
             if (cmd_fusion->scmd) {
                 if (megasas_dbg_lvl & OCR_DEBUG) {
                     sdev_printk(KERN_INFO,
                         cmd_fusion->scmd->device, "SMID: 0x%x\n",
                         cmd_fusion->index);
                     megasas_dump_fusion_io(cmd_fusion->scmd);
                 }
 
                 if (cmd_fusion->io_request->Function ==
                     MPI2_FUNCTION_SCSI_IO_REQUEST)
                     fpio_count++;
 
                 scmd_local->result =
                     megasas_check_mpio_paths(instance,
                             scmd_local);
                 if (instance->ldio_threshold &&
                     megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
                     atomic_dec(&instance->ldio_outstanding);
                 megasas_return_cmd_fusion(instance, cmd_fusion);
                 scsi_dma_unmap(scmd_local);
                 scsi_done(scmd_local);
             }
         }
 
         dev_info(&instance->pdev->dev, "Outstanding fastpath IOs: %d\n",
             fpio_count);
 
         atomic_set(&instance->fw_outstanding, 0);
 
         status_reg = instance->instancet->read_fw_status_reg(instance);
         abs_state = status_reg & MFI_STATE_MASK;
         reset_adapter = status_reg & MFI_RESET_ADAPTER;
         if (instance->disableOnlineCtrlReset ||
             (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
             /* Reset not supported, kill adapter */
             dev_warn(&instance->pdev->dev, "Reset not supported"
                    ", killing adapter scsi%d.\n",
                 instance->host->host_no);
             goto kill_hba;
         }
 
         /* Let SR-IOV VF & PF sync up if there was a HB failure */
         if (instance->requestorId && !reason) {
             msleep(MEGASAS_OCR_SETTLE_TIME_VF);
             do_adp_reset = false;
             max_reset_tries = MEGASAS_SRIOV_MAX_RESET_TRIES_VF;
         }
 
         /* Now try to reset the chip */
         for (i = 0; i < max_reset_tries; i++) {
             /*
              * Do adp reset and wait for
              * controller to transition to ready
              */
             if (megasas_adp_reset_wait_for_ready(instance,
                 do_adp_reset, 1) == FAILED)
                 continue;
 
             /* Wait for FW to become ready */
             if (megasas_transition_to_ready(instance, 1)) {
                 dev_warn(&instance->pdev->dev,
                     "Failed to transition controller to ready for "
                     "scsi%d.\n", instance->host->host_no);
                 continue;
             }
             megasas_reset_reply_desc(instance);
             megasas_fusion_update_can_queue(instance, OCR_CONTEXT);
 
             if (megasas_ioc_init_fusion(instance)) {
                 continue;
             }
 
             if (megasas_get_ctrl_info(instance)) {
                 dev_info(&instance->pdev->dev,
                     "Failed from %s %d\n",
                     __func__, __LINE__);
                 goto kill_hba;
             }
 
             megasas_refire_mgmt_cmd(instance,
                         (i == (MEGASAS_FUSION_MAX_RESET_TRIES - 1)
                             ? 1 : 0));
 
             /* Reset load balance info */
             if (fusion->load_balance_info)
                 memset(fusion->load_balance_info, 0,
                        (sizeof(struct LD_LOAD_BALANCE_INFO) *
                        MAX_LOGICAL_DRIVES_EXT));
 
             if (!megasas_get_map_info(instance)) {
                 megasas_sync_map_info(instance);
             } else {
                 /*
                  * Return pending polled mode cmds before
                  * retrying OCR
                  */
                 megasas_return_polled_cmds(instance);
                 continue;
             }
 
             megasas_setup_jbod_map(instance);
 
             /* reset stream detection array */
             if (instance->adapter_type >= VENTURA_SERIES) {
                 for (j = 0; j < MAX_LOGICAL_DRIVES_EXT; ++j) {
                     memset(fusion->stream_detect_by_ld[j],
                            0, sizeof(struct LD_STREAM_DETECT));
                     fusion->stream_detect_by_ld[j]->mru_bit_map
                         = MR_STREAM_BITMAP;
                 }
             }
 
             clear_bit(MEGASAS_FUSION_IN_RESET,
                   &instance->reset_flags);
             instance->instancet->enable_intr(instance);
             megasas_enable_irq_poll(instance);
             shost_for_each_device(sdev, shost) {
                 if ((instance->tgt_prop) &&
                     (instance->nvme_page_size))
                     ret_target_prop = megasas_get_target_prop(instance, sdev);
 
                 is_target_prop = (ret_target_prop == DCMD_SUCCESS) ? true : false;
                 megasas_set_dynamic_target_properties(sdev, is_target_prop);
             }
 
             status_reg = instance->instancet->read_fw_status_reg
                     (instance);
             abs_state = status_reg & MFI_STATE_MASK;
             if (abs_state != MFI_STATE_OPERATIONAL) {
                 dev_info(&instance->pdev->dev,
                      "Adapter is not OPERATIONAL, state 0x%x for scsi:%d\n",
                      abs_state, instance->host->host_no);
                 goto out;
             }
             atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
 
             dev_info(&instance->pdev->dev,
                  "Adapter is OPERATIONAL for scsi:%d\n",
                  instance->host->host_no);
 
             /* Restart SR-IOV heartbeat */
             if (instance->requestorId) {
                 if (!megasas_sriov_start_heartbeat(instance, 0))
                     megasas_start_timer(instance);
                 else
                     instance->skip_heartbeat_timer_del = 1;
             }
 
             if (instance->crash_dump_drv_support &&
                 instance->crash_dump_app_support)
                 megasas_set_crash_dump_params(instance,
                     MR_CRASH_BUF_TURN_ON);
             else
                 megasas_set_crash_dump_params(instance,
                     MR_CRASH_BUF_TURN_OFF);
 
             if (instance->snapdump_wait_time) {
                 megasas_get_snapdump_properties(instance);
                 dev_info(&instance->pdev->dev,
                      "Snap dump wait time\t: %d\n",
                      instance->snapdump_wait_time);
             }
 
             retval = SUCCESS;
 
             /* Adapter reset completed successfully */
             dev_warn(&instance->pdev->dev,
                  "Reset successful for scsi%d.\n",
                  instance->host->host_no);
 
             goto out;
         }
         /* Reset failed, kill the adapter */
         dev_warn(&instance->pdev->dev, "Reset failed, killing "
                "adapter scsi%d.\n", instance->host->host_no);
         goto kill_hba;
     } else {
         /* For VF: Restart HB timer if we didn't OCR */
         if (instance->requestorId) {
             megasas_start_timer(instance);
         }
         clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
         instance->instancet->enable_intr(instance);
         megasas_enable_irq_poll(instance);
         atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
         goto out;
     }
 kill_hba:
     megaraid_sas_kill_hba(instance);
     megasas_enable_irq_poll(instance);
     instance->skip_heartbeat_timer_del = 1;
     retval = FAILED;
 out:
     clear_bit(MEGASAS_FUSION_OCR_NOT_POSSIBLE, &instance->reset_flags);
     mutex_unlock(&instance->reset_mutex);
     return retval;
 }
 
 /* Fusion Crash dump collection */
 static void  megasas_fusion_crash_dump(struct megasas_instance *instance)
 {
     u32 status_reg;
     u8 partial_copy = 0;
     int wait = 0;
 
 
     status_reg = instance->instancet->read_fw_status_reg(instance);
 
     /*
      * Allocate host crash buffers to copy data from 1 MB DMA crash buffer
      * to host crash buffers
      */
     if (instance->drv_buf_index == 0) {
         /* Buffer is already allocated for old Crash dump.
          * Do OCR and do not wait for crash dump collection
          */
         if (instance->drv_buf_alloc) {
             dev_info(&instance->pdev->dev, "earlier crash dump is "
                 "not yet copied by application, ignoring this "
                 "crash dump and initiating OCR\n");
             status_reg |= MFI_STATE_CRASH_DUMP_DONE;
             writel(status_reg,
                 &instance->reg_set->outbound_scratch_pad_0);
             readl(&instance->reg_set->outbound_scratch_pad_0);
             return;
         }
         megasas_alloc_host_crash_buffer(instance);
         dev_info(&instance->pdev->dev, "Number of host crash buffers "
             "allocated: %d\n", instance->drv_buf_alloc);
     }
 
     while (!(status_reg & MFI_STATE_CRASH_DUMP_DONE) &&
            (wait < MEGASAS_WATCHDOG_WAIT_COUNT)) {
         if (!(status_reg & MFI_STATE_DMADONE)) {
             /*
              * Next crash dump buffer is not yet DMA'd by FW
              * Check after 10ms. Wait for 1 second for FW to
              * post the next buffer. If not bail out.
              */
             wait++;
             msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
             status_reg = instance->instancet->read_fw_status_reg(
                     instance);
             continue;
         }
 
         wait = 0;
         if (instance->drv_buf_index >= instance->drv_buf_alloc) {
             dev_info(&instance->pdev->dev,
                  "Driver is done copying the buffer: %d\n",
                  instance->drv_buf_alloc);
             status_reg |= MFI_STATE_CRASH_DUMP_DONE;
             partial_copy = 1;
             break;
         } else {
             memcpy(instance->crash_buf[instance->drv_buf_index],
                    instance->crash_dump_buf, CRASH_DMA_BUF_SIZE);
             instance->drv_buf_index++;
             status_reg &= ~MFI_STATE_DMADONE;
         }
 
         writel(status_reg, &instance->reg_set->outbound_scratch_pad_0);
         readl(&instance->reg_set->outbound_scratch_pad_0);
 
         msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
         status_reg = instance->instancet->read_fw_status_reg(instance);
     }
 
     if (status_reg & MFI_STATE_CRASH_DUMP_DONE) {
         dev_info(&instance->pdev->dev, "Crash Dump is available,number "
             "of copied buffers: %d\n", instance->drv_buf_index);
         instance->fw_crash_buffer_size =  instance->drv_buf_index;
         instance->fw_crash_state = AVAILABLE;
         instance->drv_buf_index = 0;
         writel(status_reg, &instance->reg_set->outbound_scratch_pad_0);
         readl(&instance->reg_set->outbound_scratch_pad_0);
         if (!partial_copy)
             megasas_reset_fusion(instance->host, 0);
     }
 }
 
 
 /* Fusion OCR work queue */
 void megasas_fusion_ocr_wq(struct work_struct *work)
 {
     struct megasas_instance *instance =
         container_of(work, struct megasas_instance, work_init);
 
     megasas_reset_fusion(instance->host, 0);
 }
 
 /* Allocate fusion context */
 int
 megasas_alloc_fusion_context(struct megasas_instance *instance)
 {
     struct fusion_context *fusion;
 
     instance->ctrl_context = kzalloc(sizeof(struct fusion_context),
                      GFP_KERNEL);
     if (!instance->ctrl_context) {
         dev_err(&instance->pdev->dev, "Failed from %s %d\n",
             __func__, __LINE__);
         return -ENOMEM;
     }
 
     fusion = instance->ctrl_context;
 
     fusion->log_to_span_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
                           sizeof(LD_SPAN_INFO));
     fusion->log_to_span =
         (PLD_SPAN_INFO)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
                         fusion->log_to_span_pages);
     if (!fusion->log_to_span) {
         fusion->log_to_span =
             vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT,
                        sizeof(LD_SPAN_INFO)));
         if (!fusion->log_to_span) {
             dev_err(&instance->pdev->dev, "Failed from %s %d\n",
                 __func__, __LINE__);
             return -ENOMEM;
         }
     }
 
     fusion->load_balance_info_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
         sizeof(struct LD_LOAD_BALANCE_INFO));
     fusion->load_balance_info =
         (struct LD_LOAD_BALANCE_INFO *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
         fusion->load_balance_info_pages);
     if (!fusion->load_balance_info) {
         fusion->load_balance_info =
             vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT,
                        sizeof(struct LD_LOAD_BALANCE_INFO)));
         if (!fusion->load_balance_info)
             dev_err(&instance->pdev->dev, "Failed to allocate load_balance_info, "
                 "continuing without Load Balance support\n");
     }
 
     return 0;
 }
 
 void
 megasas_free_fusion_context(struct megasas_instance *instance)
 {
     struct fusion_context *fusion = instance->ctrl_context;
 
     if (fusion) {
         if (fusion->load_balance_info) {
             if (is_vmalloc_addr(fusion->load_balance_info))
                 vfree(fusion->load_balance_info);
             else
                 free_pages((ulong)fusion->load_balance_info,
                     fusion->load_balance_info_pages);
         }
 
         if (fusion->log_to_span) {
             if (is_vmalloc_addr(fusion->log_to_span))
                 vfree(fusion->log_to_span);
             else
                 free_pages((ulong)fusion->log_to_span,
                        fusion->log_to_span_pages);
         }
 
         kfree(fusion);
     }
 }
 
 struct megasas_instance_template megasas_instance_template_fusion = {
     .enable_intr = megasas_enable_intr_fusion,
     .disable_intr = megasas_disable_intr_fusion,
     .clear_intr = megasas_clear_intr_fusion,
     .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
     .adp_reset = megasas_adp_reset_fusion,
     .check_reset = megasas_check_reset_fusion,
     .service_isr = megasas_isr_fusion,
     .tasklet = megasas_complete_cmd_dpc_fusion,
     .init_adapter = megasas_init_adapter_fusion,
     .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
     .issue_dcmd = megasas_issue_dcmd_fusion,
 };