1 files changed, 264 insertions, 290 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index dba4de04de3c..46a0f8f4f677 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -53,10 +53,12 @@
 #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_free_cmds(struct megasas_instance *instance);
 extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
 					   *instance);
@@ -156,28 +158,15 @@ megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs)
  * megasas_get_cmd_fusion -	Get a command from the free pool
  * @instance:		Adapter soft state
  *
- * Returns a free command from the pool
+ * Returns a blk_tag indexed mpt frame
  */
-struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
-						  *instance)
+inline struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
+						  *instance, u32 blk_tag)
 {
-	unsigned long flags;
-	struct fusion_context *fusion =
-		(struct fusion_context *)instance->ctrl_context;
-	struct megasas_cmd_fusion *cmd = NULL;
-
-	spin_lock_irqsave(&fusion->mpt_pool_lock, flags);
-
-	if (!list_empty(&fusion->cmd_pool)) {
-		cmd = list_entry((&fusion->cmd_pool)->next,
-				 struct megasas_cmd_fusion, list);
-		list_del_init(&cmd->list);
-	} else {
-		printk(KERN_ERR "megasas: Command pool (fusion) empty!\n");
-	}
+	struct fusion_context *fusion;
 
-	spin_unlock_irqrestore(&fusion->mpt_pool_lock, flags);
-	return cmd;
+	fusion = instance->ctrl_context;
+	return fusion->cmd_list[blk_tag];
 }
 
 /**
@@ -188,47 +177,35 @@ struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
 	struct megasas_cmd_fusion *cmd)
 {
-	unsigned long flags;
-	struct fusion_context *fusion =
-		(struct fusion_context *)instance->ctrl_context;
-
-	spin_lock_irqsave(&fusion->mpt_pool_lock, flags);
-
 	cmd->scmd = NULL;
-	cmd->sync_cmd_idx = (u32)ULONG_MAX;
 	memset(cmd->io_request, 0, sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
-	list_add(&cmd->list, (&fusion->cmd_pool)->next);
-
-	spin_unlock_irqrestore(&fusion->mpt_pool_lock, flags);
 }
 
 /**
- * megasas_return_mfi_mpt_pthr - Return a mfi and mpt to free command pool
- * @instance:		Adapter soft state
- * @cmd_mfi:		MFI Command packet to be returned to free command pool
- * @cmd_mpt:		MPT Command packet to be returned to free command pool
+ * megasas_fire_cmd_fusion -	Sends command to the FW
  */
-inline void megasas_return_mfi_mpt_pthr(struct megasas_instance *instance,
-		struct megasas_cmd *cmd_mfi,
-		struct megasas_cmd_fusion *cmd_fusion)
+static void
+megasas_fire_cmd_fusion(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;
 
-	/*
-	 * TO DO: optimize this code and use only one lock instead of two
-	 * locks being used currently- mpt_pool_lock is acquired
-	 * inside mfi_pool_lock
-	 */
-	spin_lock_irqsave(&instance->mfi_pool_lock, flags);
-	megasas_return_cmd_fusion(instance, cmd_fusion);
-	if (atomic_read(&cmd_mfi->mfi_mpt_pthr) != MFI_MPT_ATTACHED)
-		dev_err(&instance->pdev->dev, "Possible bug from %s %d\n",
-			__func__, __LINE__);
-	atomic_set(&cmd_mfi->mfi_mpt_pthr, MFI_MPT_DETACHED);
-	__megasas_return_cmd(instance, cmd_mfi);
-	spin_unlock_irqrestore(&instance->mfi_pool_lock, 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_teardown_frame_pool_fusion -	Destroy the cmd frame DMA pool
  * @instance:				Adapter soft state
@@ -326,7 +303,6 @@ megasas_free_cmds_fusion(struct megasas_instance *instance)
 	kfree(fusion->cmd_list);
 	fusion->cmd_list = NULL;
 
-	INIT_LIST_HEAD(&fusion->cmd_pool);
 }
 
 /**
@@ -464,7 +440,7 @@ megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 
 	reply_desc = fusion->reply_frames_desc;
 	for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
-		reply_desc->Words = ULLONG_MAX;
+		reply_desc->Words = cpu_to_le64(ULLONG_MAX);
 
 	io_frames_sz = fusion->io_frames_alloc_sz;
 
@@ -535,7 +511,9 @@ megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 		memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 		cmd->index = i + 1;
 		cmd->scmd = NULL;
-		cmd->sync_cmd_idx = (u32)ULONG_MAX; /* Set to Invalid */
+		cmd->sync_cmd_idx = (i >= instance->max_scsi_cmds) ?
+				(i - instance->max_scsi_cmds) :
+				(u32)ULONG_MAX; /* Set to Invalid */
 		cmd->instance = instance;
 		cmd->io_request =
 			(struct MPI2_RAID_SCSI_IO_REQUEST *)
@@ -543,8 +521,6 @@ megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 		memset(cmd->io_request, 0,
 		       sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 		cmd->io_request_phys_addr = io_req_base_phys + offset;
-
-		list_add_tail(&cmd->list, &fusion->cmd_pool);
 	}
 
 	/*
@@ -605,14 +581,11 @@ wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
 		msleep(20);
 	}
 
-	if (frame_hdr->cmd_status == 0xff) {
-		if (fusion)
-			megasas_return_mfi_mpt_pthr(instance, cmd,
-				cmd->mpt_pthr_cmd_blocked);
+	if (frame_hdr->cmd_status == 0xff)
 		return -ETIME;
-	}
 
-	return 0;
+	return (frame_hdr->cmd_status == MFI_STAT_OK) ?
+		0 : 1;
 }
 
 /**
@@ -633,6 +606,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
 	union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
 	int i;
 	struct megasas_header *frame_hdr;
+	const char *sys_info;
 
 	fusion = instance->ctrl_context;
 
@@ -673,7 +647,9 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
 
 	frame_hdr = &cmd->frame->hdr;
 	frame_hdr->cmd_status = 0xFF;
-	frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
+	frame_hdr->flags = cpu_to_le16(
+		le16_to_cpu(frame_hdr->flags) |
+		MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
 
 	init_frame->cmd	= MFI_CMD_INIT;
 	init_frame->cmd_status = 0xFF;
@@ -695,6 +671,16 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
 	/* 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 = instance->system_info_h;
+		init_frame->system_info_hi = 0;
+	}
+
 	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 =
@@ -719,8 +705,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
 			break;
 	}
 
-	instance->instancet->fire_cmd(instance, req_desc.u.low,
-				      req_desc.u.high, instance->reg_set);
+	megasas_fire_cmd_fusion(instance, &req_desc);
 
 	wait_and_poll(instance, cmd, MFI_POLL_TIMEOUT_SECS);
 
@@ -820,11 +805,7 @@ megasas_get_ld_map_info(struct megasas_instance *instance)
 	else
 		ret = megasas_issue_polled(instance, cmd);
 
-	if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
-		megasas_return_mfi_mpt_pthr(instance, cmd,
-			cmd->mpt_pthr_cmd_blocked);
-	else
-		megasas_return_cmd(instance, cmd);
+	megasas_return_cmd(instance, cmd);
 
 	return ret;
 }
@@ -1061,6 +1042,15 @@ megasas_init_adapter_fusion(struct megasas_instance *instance)
 		fusion->last_reply_idx[i] = 0;
 
 	/*
+	 * For fusion adapters, 3 commands for IOCTL and 5 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);
+
+	/*
 	 * Allocate memory for descriptors
 	 * Create a pool of commands
 	 */
@@ -1131,34 +1121,6 @@ fail_alloc_mfi_cmds:
 }
 
 /**
- * megasas_fire_cmd_fusion -	Sends command to the FW
- * @frame_phys_addr :		Physical address of cmd
- * @frame_count :		Number of frames for the command
- * @regs :			MFI register set
- */
-void
-megasas_fire_cmd_fusion(struct megasas_instance *instance,
-			dma_addr_t req_desc_lo,
-			u32 req_desc_hi,
-			struct megasas_register_set __iomem *regs)
-{
-#if defined(writeq) && defined(CONFIG_64BIT)
-	u64 req_data = (((u64)le32_to_cpu(req_desc_hi) << 32) |
-			le32_to_cpu(req_desc_lo));
-
-	writeq(req_data, &(regs)->inbound_low_queue_port);
-#else
-	unsigned long flags;
-
-	spin_lock_irqsave(&instance->hba_lock, flags);
-
-	writel(le32_to_cpu(req_desc_lo), &(regs)->inbound_low_queue_port);
-	writel(le32_to_cpu(req_desc_hi), &(regs)->inbound_high_queue_port);
-	spin_unlock_irqrestore(&instance->hba_lock, flags);
-#endif
-}
-
-/**
  * map_cmd_status -	Maps FW cmd status to OS cmd status
  * @cmd :		Pointer to cmd
  * @status :		status of cmd returned by FW
@@ -1497,7 +1459,7 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
 	struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
 	u8 *raidLUN;
 
-	device_id = MEGASAS_DEV_INDEX(instance, scp);
+	device_id = MEGASAS_DEV_INDEX(scp);
 
 	fusion = instance->ctrl_context;
 
@@ -1621,6 +1583,14 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
 			cmd->pd_r1_lb = io_info.pd_after_lb;
 		} else
 			scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
+
+		if ((raidLUN[0] == 1) &&
+			(local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].validHandles > 2)) {
+			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;
 		/* populate the LUN field */
@@ -1650,121 +1620,68 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
 }
 
 /**
- * megasas_build_dcdb_fusion -	Prepares IOs to devices
+ * megasas_build_ld_nonrw_fusion - prepares non rw ios for virtual disk
  * @instance:		Adapter soft state
  * @scp:		SCSI command
  * @cmd:		Command to be prepared
  *
- * Prepares the io_request frame for non-io cmds
+ * Prepares the io_request frame for non-rw io cmds for vd.
  */
-static void
-megasas_build_dcdb_fusion(struct megasas_instance *instance,
-			  struct scsi_cmnd *scmd,
-			  struct megasas_cmd_fusion *cmd)
+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 pd_index = 0;
-	u16 os_timeout_value;
-	u16 timeout_limit;
 	struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
 	struct fusion_context *fusion = instance->ctrl_context;
 	u8                          span, physArm;
-	u16                         devHandle;
+	__le16                      devHandle;
 	u32                         ld, 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(instance, scmd);
-	pd_index = (scmd->device->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
-		+scmd->device->id;
+	device_id = MEGASAS_DEV_INDEX(scmd);
+	pd_index = MEGASAS_PD_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;
+	/* Check with FW team */
+	pRAID_Context->VirtualDiskTgtId = cpu_to_le16(device_id);
+	pRAID_Context->regLockRowLBA    = 0;
+	pRAID_Context->regLockLength    = 0;
 
-	if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS &&
-	    instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
-		if (fusion->fast_path_io)
-			io_request->DevHandle =
-			local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
-		io_request->RaidContext.RAIDFlags =
-			MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD
-			<< MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
-		cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
-		cmd->request_desc->SCSIIO.MSIxIndex =
-			instance->msix_vectors ?
-				raw_smp_processor_id() %
-					instance->msix_vectors :
-				0;
-		os_timeout_value = scmd->request->timeout / HZ;
-
-		if (instance->secure_jbod_support &&
-			(megasas_cmd_type(scmd) == NON_READ_WRITE_SYSPDIO)) {
-			/* 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);
-			io_request->RaidContext.timeoutValue =
-				cpu_to_le16(os_timeout_value);
-		} else {
-			/* system pd Fast Path */
-			io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
-			io_request->RaidContext.regLockFlags = 0;
-			io_request->RaidContext.regLockRowLBA = 0;
-			io_request->RaidContext.regLockLength = 0;
-			timeout_limit = (scmd->device->type == TYPE_DISK) ?
-					255 : 0xFFFF;
-			io_request->RaidContext.timeoutValue =
-				cpu_to_le16((os_timeout_value > timeout_limit) ?
-				timeout_limit : os_timeout_value);
-		if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
-			(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
-			io_request->IoFlags |=
-			cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
-
-			cmd->request_desc->SCSIIO.RequestFlags =
-				(MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
-				MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
-		}
-	} else {
-		if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS)
-			goto NonFastPath;
-
-		/*
-		 * For older firmware, Driver should not access ldTgtIdToLd
-		 * beyond index 127 and for Extended VD firmware, ldTgtIdToLd
-		 * should not go beyond 255.
-		 */
-
-		if ((!fusion->fast_path_io) ||
-			(device_id >= instance->fw_supported_vd_count))
-			goto NonFastPath;
+	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)
-			goto NonFastPath;
+			fp_possible = 0;
 
 		raid = MR_LdRaidGet(ld, local_map_ptr);
-
-		/* check if this LD is FP capable */
 		if (!(raid->capability.fpNonRWCapable))
-			/* not FP capable, send as non-FP */
-			goto NonFastPath;
+			fp_possible = 0;
+	} else
+		fp_possible = 0;
 
-		/* get RAID_Context pointer */
-		pRAID_Context = &io_request->RaidContext;
+	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->timeoutValue =
+			cpu_to_le16 (scmd->request->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->regLockFlags     = REGION_TYPE_SHARED_READ;
-		pRAID_Context->timeoutValue     = cpu_to_le16(raid->fpIoTimeoutForLd);
-		pRAID_Context->VirtualDiskTgtId = cpu_to_le16(device_id);
-		pRAID_Context->regLockRowLBA    = 0;
-		pRAID_Context->regLockLength    = 0;
-		pRAID_Context->configSeqNum     = raid->seqNum;
+		pRAID_Context->configSeqNum = raid->seqNum;
+		pRAID_Context->regLockFlags = REGION_TYPE_SHARED_READ;
+		pRAID_Context->timeoutValue = cpu_to_le16(raid->fpIoTimeoutForLd);
 
 		/* get the DevHandle for the PD (since this is
 		   fpNonRWCapable, this is a single disk RAID0) */
@@ -1776,7 +1693,7 @@ megasas_build_dcdb_fusion(struct megasas_instance *instance,
 		/* build request descriptor */
 		cmd->request_desc->SCSIIO.RequestFlags =
 			(MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
-			 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+			MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 		cmd->request_desc->SCSIIO.DevHandle = devHandle;
 
 		/* populate the LUN field */
@@ -1785,18 +1702,87 @@ megasas_build_dcdb_fusion(struct megasas_instance *instance,
 		/* build the raidScsiIO structure */
 		io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
 		io_request->DevHandle = devHandle;
+	}
+}
 
-		return;
+/**
+ * megasas_build_syspd_fusion - prepares rw/non-rw ios for syspd
+ * @instance:		Adapter soft state
+ * @scp:		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, u8 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 fusion_context *fusion = instance->ctrl_context;
+
+	device_id = MEGASAS_DEV_INDEX(scmd);
+	pd_index = MEGASAS_PD_INDEX(scmd);
+	os_timeout_value = scmd->request->timeout / HZ;
 
-NonFastPath:
+	io_request = cmd->io_request;
+	/* get RAID_Context pointer */
+	pRAID_Context = &io_request->RaidContext;
+	io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
+	io_request->LUN[1] = scmd->device->lun;
+	pRAID_Context->RAIDFlags = MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD
+		<< MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
+
+	pRAID_Context->VirtualDiskTgtId = cpu_to_le16(device_id);
+	pRAID_Context->configSeqNum = 0;
+	local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
+	io_request->DevHandle =
+		local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
+
+	cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
+	cmd->request_desc->SCSIIO.MSIxIndex =
+		instance->msix_vectors ?
+		(raw_smp_processor_id() % instance->msix_vectors) : 0;
+
+
+	if (!fp_possible) {
+		/* system pd firmware path */
 		io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
-		io_request->DevHandle = cpu_to_le16(device_id);
 		cmd->request_desc->SCSIIO.RequestFlags =
 			(MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
-			 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+				MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+		pRAID_Context->timeoutValue = cpu_to_le16(os_timeout_value);
+	} else {
+		/* system pd Fast Path */
+		io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
+		pRAID_Context->regLockFlags = 0;
+		pRAID_Context->regLockRowLBA = 0;
+		pRAID_Context->regLockLength = 0;
+		timeout_limit = (scmd->device->type == TYPE_DISK) ?
+				255 : 0xFFFF;
+		pRAID_Context->timeoutValue =
+			cpu_to_le16((os_timeout_value > timeout_limit) ?
+			timeout_limit : os_timeout_value);
+		if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
+			(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
+			cmd->request_desc->SCSIIO.RequestFlags |=
+				(MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
+				MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+			pRAID_Context->Type = MPI2_TYPE_CUDA;
+			pRAID_Context->nseg = 0x1;
+			io_request->IoFlags |=
+				cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
+		}
+		cmd->request_desc->SCSIIO.RequestFlags =
+			(MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
+				MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 	}
-	io_request->RaidContext.VirtualDiskTgtId = cpu_to_le16(device_id);
-	int_to_scsilun(scmd->device->lun, (struct scsi_lun *)io_request->LUN);
 }
 
 /**
@@ -1813,11 +1799,10 @@ megasas_build_io_fusion(struct megasas_instance *instance,
 			struct scsi_cmnd *scp,
 			struct megasas_cmd_fusion *cmd)
 {
-	u32 device_id, sge_count;
+	u32 sge_count;
+	u8  cmd_type;
 	struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
 
-	device_id = MEGASAS_DEV_INDEX(instance, scp);
-
 	/* Zero out some fields so they don't get reused */
 	memset(io_request->LUN, 0x0, 8);
 	io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
@@ -1837,10 +1822,24 @@ megasas_build_io_fusion(struct megasas_instance *instance,
 	 */
 	io_request->IoFlags = cpu_to_le16(scp->cmd_len);
 
-	if (megasas_cmd_type(scp) == READ_WRITE_LDIO)
+	switch (cmd_type = megasas_cmd_type(scp)) {
+	case READ_WRITE_LDIO:
 		megasas_build_ldio_fusion(instance, scp, cmd);
-	else
-		megasas_build_dcdb_fusion(instance, scp, cmd);
+		break;
+	case NON_READ_WRITE_LDIO:
+		megasas_build_ld_nonrw_fusion(instance, scp, cmd);
+		break;
+	case READ_WRITE_SYSPDIO:
+	case NON_READ_WRITE_SYSPDIO:
+		if (instance->secure_jbod_support &&
+			(cmd_type == NON_READ_WRITE_SYSPDIO))
+			megasas_build_syspd_fusion(instance, scp, cmd, 0);
+		else
+			megasas_build_syspd_fusion(instance, scp, cmd, 1);
+		break;
+	default:
+		break;
+	}
 
 	/*
 	 * Construct SGL
@@ -1915,9 +1914,7 @@ megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
 
 	fusion = instance->ctrl_context;
 
-	cmd = megasas_get_cmd_fusion(instance);
-	if (!cmd)
-		return SCSI_MLQUEUE_HOST_BUSY;
+	cmd = megasas_get_cmd_fusion(instance, scmd->request->tag);
 
 	index = cmd->index;
 
@@ -1948,9 +1945,7 @@ megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
 	 */
 	atomic_inc(&instance->fw_outstanding);
 
-	instance->instancet->fire_cmd(instance,
-				      req_desc->u.low, req_desc->u.high,
-				      instance->reg_set);
+	megasas_fire_cmd_fusion(instance, req_desc);
 
 	return 0;
 }
@@ -1975,6 +1970,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
 	union desc_value d_val;
 	struct LD_LOAD_BALANCE_INFO *lbinfo;
 	int threshold_reply_count = 0;
+	struct scsi_cmnd *scmd_local = NULL;
 
 	fusion = instance->ctrl_context;
 
@@ -1998,7 +1994,8 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
 
 	num_completed = 0;
 
-	while ((d_val.u.low != UINT_MAX) && (d_val.u.high != UINT_MAX)) {
+	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];
@@ -2010,14 +2007,14 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
 		if (cmd_fusion->scmd)
 			cmd_fusion->scmd->SCp.ptr = NULL;
 
+		scmd_local = cmd_fusion->scmd;
 		status = scsi_io_req->RaidContext.status;
 		extStatus = scsi_io_req->RaidContext.exStatus;
 
 		switch (scsi_io_req->Function) {
 		case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
 			/* Update load balancing info */
-			device_id = MEGASAS_DEV_INDEX(instance,
-						      cmd_fusion->scmd);
+			device_id = MEGASAS_DEV_INDEX(scmd_local);
 			lbinfo = &fusion->load_balance_info[device_id];
 			if (cmd_fusion->scmd->SCp.Status &
 			    MEGASAS_LOAD_BALANCE_FLAG) {
@@ -2035,29 +2032,25 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
 		case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
 			/* Map the FW Cmd Status */
 			map_cmd_status(cmd_fusion, status, extStatus);
-			scsi_dma_unmap(cmd_fusion->scmd);
-			cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
 			scsi_io_req->RaidContext.status = 0;
 			scsi_io_req->RaidContext.exStatus = 0;
 			megasas_return_cmd_fusion(instance, cmd_fusion);
+			scsi_dma_unmap(scmd_local);
+			scmd_local->scsi_done(scmd_local);
 			atomic_dec(&instance->fw_outstanding);
 
 			break;
 		case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
 			cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
 
-			if (!cmd_mfi->mpt_pthr_cmd_blocked) {
-				if (megasas_dbg_lvl == 5)
-					dev_info(&instance->pdev->dev,
-						"freeing mfi/mpt pass-through "
-						"from %s %d\n",
-						 __func__, __LINE__);
-				megasas_return_mfi_mpt_pthr(instance, cmd_mfi,
-					cmd_fusion);
-			}
-
-			megasas_complete_cmd(instance, cmd_mfi, DID_OK);
-			cmd_fusion->flags = 0;
+			/* 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;
 		}
 
@@ -2066,7 +2059,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
 		    fusion->reply_q_depth)
 			fusion->last_reply_idx[MSIxIndex] = 0;
 
-		desc->Words = ULLONG_MAX;
+		desc->Words = cpu_to_le64(ULLONG_MAX);
 		num_completed++;
 		threshold_reply_count++;
 
@@ -2217,27 +2210,14 @@ build_mpt_mfi_pass_thru(struct megasas_instance *instance,
 	struct megasas_cmd_fusion *cmd;
 	struct fusion_context *fusion;
 	struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
-	u32 opcode;
 
-	cmd = megasas_get_cmd_fusion(instance);
-	if (!cmd)
-		return 1;
+	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;
-	cmd->sync_cmd_idx = mfi_cmd->index;
-
-	/* Set this only for Blocked commands */
-	opcode = le32_to_cpu(mfi_cmd->frame->dcmd.opcode);
-	if ((opcode == MR_DCMD_LD_MAP_GET_INFO)
-		&& (mfi_cmd->frame->dcmd.mbox.b[1] == 1))
-		mfi_cmd->is_wait_event = 1;
-
-	if (opcode == MR_DCMD_CTRL_EVENT_WAIT)
-		mfi_cmd->is_wait_event = 1;
-
-	if (mfi_cmd->is_wait_event)
-		mfi_cmd->mpt_pthr_cmd_blocked = cmd;
 
 	/*
 	 * For cmds where the flag is set, store the flag and check
@@ -2246,9 +2226,8 @@ build_mpt_mfi_pass_thru(struct megasas_instance *instance,
 	 */
 
 	if (frame_hdr->flags & cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE))
-		cmd->flags = MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
+		mfi_cmd->flags |= DRV_DCMD_POLLED_MODE;
 
-	fusion = instance->ctrl_context;
 	io_req = cmd->io_request;
 
 	if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
@@ -2327,9 +2306,7 @@ megasas_issue_dcmd_fusion(struct megasas_instance *instance,
 		printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
 		return;
 	}
-	atomic_set(&cmd->mfi_mpt_pthr, MFI_MPT_ATTACHED);
-	instance->instancet->fire_cmd(instance, req_desc->u.low,
-				      req_desc->u.high, instance->reg_set);
+	megasas_fire_cmd_fusion(instance, req_desc);
 }
 
 /**
@@ -2508,7 +2485,42 @@ void  megasas_reset_reply_desc(struct megasas_instance *instance)
 		fusion->last_reply_idx[i] = 0;
 	reply_desc = fusion->reply_frames_desc;
 	for (i = 0 ; i < fusion->reply_q_depth * count; i++, reply_desc++)
-		reply_desc->Words = ULLONG_MAX;
+		reply_desc->Words = cpu_to_le64(ULLONG_MAX);
+}
+
+/*
+ * megasas_refire_mgmt_cmd :	Re-fire management commands
+ * @instance:				Controller's soft instance
+*/
+void megasas_refire_mgmt_cmd(struct megasas_instance *instance)
+{
+	int j;
+	struct megasas_cmd_fusion *cmd_fusion;
+	struct fusion_context *fusion;
+	struct megasas_cmd *cmd_mfi;
+	union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
+	u16 smid;
+
+	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);
+
+		if (!smid)
+			continue;
+		req_desc = megasas_get_request_descriptor
+					(instance, smid - 1);
+		if (req_desc && (cmd_mfi->frame->dcmd.opcode !=
+				cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO)))
+			megasas_fire_cmd_fusion(instance, req_desc);
+		else
+			megasas_return_cmd(instance, cmd_mfi);
+	}
 }
 
 /* Check for a second path that is currently UP */
@@ -2538,14 +2550,13 @@ out:
 /* Core fusion reset function */
 int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
 {
-	int retval = SUCCESS, i, j, retry = 0, convert = 0;
+	int retval = SUCCESS, i, retry = 0, convert = 0;
 	struct megasas_instance *instance;
 	struct megasas_cmd_fusion *cmd_fusion;
 	struct fusion_context *fusion;
-	struct megasas_cmd *cmd_mfi;
-	union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
 	u32 host_diag, abs_state, status_reg, reset_adapter;
 	u32 io_timeout_in_crash_mode = 0;
+	struct scsi_cmnd *scmd_local = NULL;
 
 	instance = (struct megasas_instance *)shost->hostdata;
 	fusion = instance->ctrl_context;
@@ -2613,15 +2624,16 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
 			iotimeout = 0;
 
 		/* Now return commands back to the OS */
-		for (i = 0 ; i < instance->max_fw_cmds; i++) {
+		for (i = 0 ; i < instance->max_scsi_cmds; i++) {
 			cmd_fusion = fusion->cmd_list[i];
+			scmd_local = cmd_fusion->scmd;
 			if (cmd_fusion->scmd) {
-				scsi_dma_unmap(cmd_fusion->scmd);
-				cmd_fusion->scmd->result =
+				scmd_local->result =
 					megasas_check_mpio_paths(instance,
-								 cmd_fusion->scmd);
-				cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
+							scmd_local);
 				megasas_return_cmd_fusion(instance, cmd_fusion);
+				scsi_dma_unmap(scmd_local);
+				scmd_local->scsi_done(scmd_local);
 				atomic_dec(&instance->fw_outstanding);
 			}
 		}
@@ -2790,44 +2802,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
 				continue;
 			}
 
-			/* Re-fire management commands */
-			for (j = 0 ; j < instance->max_fw_cmds; j++) {
-				cmd_fusion = fusion->cmd_list[j];
-				if (cmd_fusion->sync_cmd_idx !=
-				    (u32)ULONG_MAX) {
-					cmd_mfi =
-					instance->
-					cmd_list[cmd_fusion->sync_cmd_idx];
-					if (cmd_mfi->frame->dcmd.opcode ==
-					    cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO)) {
-						megasas_return_mfi_mpt_pthr(instance, cmd_mfi, cmd_fusion);
-					} else  {
-						req_desc =
-						megasas_get_request_descriptor(
-							instance,
-							cmd_mfi->context.smid
-							-1);
-						if (!req_desc) {
-							printk(KERN_WARNING
-							       "req_desc NULL"
-							       " for scsi%d\n",
-								instance->host->host_no);
-							/* Return leaked MPT
-							   frame */
-							megasas_return_cmd_fusion(instance, cmd_fusion);
-						} else {
-							instance->instancet->
-							fire_cmd(instance,
-								 req_desc->
-								 u.low,
-								 req_desc->
-								 u.high,
-								 instance->
-								 reg_set);
-						}
-					}
-				}
-			}
+			megasas_refire_mgmt_cmd(instance);
 
 			if (megasas_get_ctrl_info(instance)) {
 				dev_info(&instance->pdev->dev,
@@ -2978,7 +2953,6 @@ void megasas_fusion_ocr_wq(struct work_struct *work)
 }
 
 struct megasas_instance_template megasas_instance_template_fusion = {
-	.fire_cmd = megasas_fire_cmd_fusion,
 	.enable_intr = megasas_enable_intr_fusion,
 	.disable_intr = megasas_disable_intr_fusion,
 	.clear_intr = megasas_clear_intr_fusion,