Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 5372 insertions, 0 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
new file mode 100644
index 000000000..1475f3e25
--- /dev/null
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -0,0 +1,5372 @@
+// 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);
+
+	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->SGLs, cmd->io_request->SGLs,
+	       (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 = FAILED;
+		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 = FAILED;
+		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,
+};