Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 2632 insertions, 0 deletions

diff --git a/drivers/scsi/mvumi.c b/drivers/scsi/mvumi.c
new file mode 100644
index 000000000..c4acf6537
--- /dev/null
+++ b/drivers/scsi/mvumi.c
@@ -0,0 +1,2632 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Marvell UMI driver
+ *
+ * Copyright 2011 Marvell. <jyli@marvell.com>
+*/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/ktime.h>
+#include <linux/blkdev.h>
+#include <linux/io.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_eh.h>
+#include <linux/uaccess.h>
+#include <linux/kthread.h>
+
+#include "mvumi.h"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("jyli@marvell.com");
+MODULE_DESCRIPTION("Marvell UMI Driver");
+
+static const struct pci_device_id mvumi_pci_table[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, PCI_DEVICE_ID_MARVELL_MV9143) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, PCI_DEVICE_ID_MARVELL_MV9580) },
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(pci, mvumi_pci_table);
+
+static void tag_init(struct mvumi_tag *st, unsigned short size)
+{
+	unsigned short i;
+	BUG_ON(size != st->size);
+	st->top = size;
+	for (i = 0; i < size; i++)
+		st->stack[i] = size - 1 - i;
+}
+
+static unsigned short tag_get_one(struct mvumi_hba *mhba, struct mvumi_tag *st)
+{
+	BUG_ON(st->top <= 0);
+	return st->stack[--st->top];
+}
+
+static void tag_release_one(struct mvumi_hba *mhba, struct mvumi_tag *st,
+							unsigned short tag)
+{
+	BUG_ON(st->top >= st->size);
+	st->stack[st->top++] = tag;
+}
+
+static bool tag_is_empty(struct mvumi_tag *st)
+{
+	if (st->top == 0)
+		return true;
+	else
+		return false;
+}
+
+static void mvumi_unmap_pci_addr(struct pci_dev *dev, void **addr_array)
+{
+	int i;
+
+	for (i = 0; i < MAX_BASE_ADDRESS; i++)
+		if ((pci_resource_flags(dev, i) & IORESOURCE_MEM) &&
+								addr_array[i])
+			pci_iounmap(dev, addr_array[i]);
+}
+
+static int mvumi_map_pci_addr(struct pci_dev *dev, void **addr_array)
+{
+	int i;
+
+	for (i = 0; i < MAX_BASE_ADDRESS; i++) {
+		if (pci_resource_flags(dev, i) & IORESOURCE_MEM) {
+			addr_array[i] = pci_iomap(dev, i, 0);
+			if (!addr_array[i]) {
+				dev_err(&dev->dev, "failed to map Bar[%d]\n",
+									i);
+				mvumi_unmap_pci_addr(dev, addr_array);
+				return -ENOMEM;
+			}
+		} else
+			addr_array[i] = NULL;
+
+		dev_dbg(&dev->dev, "Bar %d : %p.\n", i, addr_array[i]);
+	}
+
+	return 0;
+}
+
+static struct mvumi_res *mvumi_alloc_mem_resource(struct mvumi_hba *mhba,
+				enum resource_type type, unsigned int size)
+{
+	struct mvumi_res *res = kzalloc(sizeof(*res), GFP_ATOMIC);
+
+	if (!res) {
+		dev_err(&mhba->pdev->dev,
+			"Failed to allocate memory for resource manager.\n");
+		return NULL;
+	}
+
+	switch (type) {
+	case RESOURCE_CACHED_MEMORY:
+		res->virt_addr = kzalloc(size, GFP_ATOMIC);
+		if (!res->virt_addr) {
+			dev_err(&mhba->pdev->dev,
+				"unable to allocate memory,size = %d.\n", size);
+			kfree(res);
+			return NULL;
+		}
+		break;
+
+	case RESOURCE_UNCACHED_MEMORY:
+		size = round_up(size, 8);
+		res->virt_addr = dma_alloc_coherent(&mhba->pdev->dev, size,
+						    &res->bus_addr,
+						    GFP_KERNEL);
+		if (!res->virt_addr) {
+			dev_err(&mhba->pdev->dev,
+					"unable to allocate consistent mem,"
+							"size = %d.\n", size);
+			kfree(res);
+			return NULL;
+		}
+		break;
+
+	default:
+		dev_err(&mhba->pdev->dev, "unknown resource type %d.\n", type);
+		kfree(res);
+		return NULL;
+	}
+
+	res->type = type;
+	res->size = size;
+	INIT_LIST_HEAD(&res->entry);
+	list_add_tail(&res->entry, &mhba->res_list);
+
+	return res;
+}
+
+static void mvumi_release_mem_resource(struct mvumi_hba *mhba)
+{
+	struct mvumi_res *res, *tmp;
+
+	list_for_each_entry_safe(res, tmp, &mhba->res_list, entry) {
+		switch (res->type) {
+		case RESOURCE_UNCACHED_MEMORY:
+			dma_free_coherent(&mhba->pdev->dev, res->size,
+						res->virt_addr, res->bus_addr);
+			break;
+		case RESOURCE_CACHED_MEMORY:
+			kfree(res->virt_addr);
+			break;
+		default:
+			dev_err(&mhba->pdev->dev,
+				"unknown resource type %d\n", res->type);
+			break;
+		}
+		list_del(&res->entry);
+		kfree(res);
+	}
+	mhba->fw_flag &= ~MVUMI_FW_ALLOC;
+}
+
+/**
+ * mvumi_make_sgl -	Prepares  SGL
+ * @mhba:		Adapter soft state
+ * @scmd:		SCSI command from the mid-layer
+ * @sgl_p:		SGL to be filled in
+ * @sg_count:		return the number of SG elements
+ *
+ * If successful, this function returns 0. otherwise, it returns -1.
+ */
+static int mvumi_make_sgl(struct mvumi_hba *mhba, struct scsi_cmnd *scmd,
+					void *sgl_p, unsigned char *sg_count)
+{
+	struct scatterlist *sg;
+	struct mvumi_sgl *m_sg = (struct mvumi_sgl *) sgl_p;
+	unsigned int i;
+	unsigned int sgnum = scsi_sg_count(scmd);
+	dma_addr_t busaddr;
+
+	*sg_count = dma_map_sg(&mhba->pdev->dev, scsi_sglist(scmd), sgnum,
+			       scmd->sc_data_direction);
+	if (*sg_count > mhba->max_sge) {
+		dev_err(&mhba->pdev->dev,
+			"sg count[0x%x] is bigger than max sg[0x%x].\n",
+			*sg_count, mhba->max_sge);
+		dma_unmap_sg(&mhba->pdev->dev, scsi_sglist(scmd), sgnum,
+			     scmd->sc_data_direction);
+		return -1;
+	}
+	scsi_for_each_sg(scmd, sg, *sg_count, i) {
+		busaddr = sg_dma_address(sg);
+		m_sg->baseaddr_l = cpu_to_le32(lower_32_bits(busaddr));
+		m_sg->baseaddr_h = cpu_to_le32(upper_32_bits(busaddr));
+		m_sg->flags = 0;
+		sgd_setsz(mhba, m_sg, cpu_to_le32(sg_dma_len(sg)));
+		if ((i + 1) == *sg_count)
+			m_sg->flags |= 1U << mhba->eot_flag;
+
+		sgd_inc(mhba, m_sg);
+	}
+
+	return 0;
+}
+
+static int mvumi_internal_cmd_sgl(struct mvumi_hba *mhba, struct mvumi_cmd *cmd,
+							unsigned int size)
+{
+	struct mvumi_sgl *m_sg;
+	void *virt_addr;
+	dma_addr_t phy_addr;
+
+	if (size == 0)
+		return 0;
+
+	virt_addr = dma_alloc_coherent(&mhba->pdev->dev, size, &phy_addr,
+				       GFP_KERNEL);
+	if (!virt_addr)
+		return -1;
+
+	m_sg = (struct mvumi_sgl *) &cmd->frame->payload[0];
+	cmd->frame->sg_counts = 1;
+	cmd->data_buf = virt_addr;
+
+	m_sg->baseaddr_l = cpu_to_le32(lower_32_bits(phy_addr));
+	m_sg->baseaddr_h = cpu_to_le32(upper_32_bits(phy_addr));
+	m_sg->flags = 1U << mhba->eot_flag;
+	sgd_setsz(mhba, m_sg, cpu_to_le32(size));
+
+	return 0;
+}
+
+static struct mvumi_cmd *mvumi_create_internal_cmd(struct mvumi_hba *mhba,
+				unsigned int buf_size)
+{
+	struct mvumi_cmd *cmd;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (!cmd) {
+		dev_err(&mhba->pdev->dev, "failed to create a internal cmd\n");
+		return NULL;
+	}
+	INIT_LIST_HEAD(&cmd->queue_pointer);
+
+	cmd->frame = dma_alloc_coherent(&mhba->pdev->dev, mhba->ib_max_size,
+			&cmd->frame_phys, GFP_KERNEL);
+	if (!cmd->frame) {
+		dev_err(&mhba->pdev->dev, "failed to allocate memory for FW"
+			" frame,size = %d.\n", mhba->ib_max_size);
+		kfree(cmd);
+		return NULL;
+	}
+
+	if (buf_size) {
+		if (mvumi_internal_cmd_sgl(mhba, cmd, buf_size)) {
+			dev_err(&mhba->pdev->dev, "failed to allocate memory"
+						" for internal frame\n");
+			dma_free_coherent(&mhba->pdev->dev, mhba->ib_max_size,
+					cmd->frame, cmd->frame_phys);
+			kfree(cmd);
+			return NULL;
+		}
+	} else
+		cmd->frame->sg_counts = 0;
+
+	return cmd;
+}
+
+static void mvumi_delete_internal_cmd(struct mvumi_hba *mhba,
+						struct mvumi_cmd *cmd)
+{
+	struct mvumi_sgl *m_sg;
+	unsigned int size;
+	dma_addr_t phy_addr;
+
+	if (cmd && cmd->frame) {
+		if (cmd->frame->sg_counts) {
+			m_sg = (struct mvumi_sgl *) &cmd->frame->payload[0];
+			sgd_getsz(mhba, m_sg, size);
+
+			phy_addr = (dma_addr_t) m_sg->baseaddr_l |
+				(dma_addr_t) ((m_sg->baseaddr_h << 16) << 16);
+
+			dma_free_coherent(&mhba->pdev->dev, size, cmd->data_buf,
+								phy_addr);
+		}
+		dma_free_coherent(&mhba->pdev->dev, mhba->ib_max_size,
+				cmd->frame, cmd->frame_phys);
+		kfree(cmd);
+	}
+}
+
+/**
+ * mvumi_get_cmd -	Get a command from the free pool
+ * @mhba:		Adapter soft state
+ *
+ * Returns a free command from the pool
+ */
+static struct mvumi_cmd *mvumi_get_cmd(struct mvumi_hba *mhba)
+{
+	struct mvumi_cmd *cmd = NULL;
+
+	if (likely(!list_empty(&mhba->cmd_pool))) {
+		cmd = list_entry((&mhba->cmd_pool)->next,
+				struct mvumi_cmd, queue_pointer);
+		list_del_init(&cmd->queue_pointer);
+	} else
+		dev_warn(&mhba->pdev->dev, "command pool is empty!\n");
+
+	return cmd;
+}
+
+/**
+ * mvumi_return_cmd -	Return a cmd to free command pool
+ * @mhba:		Adapter soft state
+ * @cmd:		Command packet to be returned to free command pool
+ */
+static inline void mvumi_return_cmd(struct mvumi_hba *mhba,
+						struct mvumi_cmd *cmd)
+{
+	cmd->scmd = NULL;
+	list_add_tail(&cmd->queue_pointer, &mhba->cmd_pool);
+}
+
+/**
+ * mvumi_free_cmds -	Free all the cmds in the free cmd pool
+ * @mhba:		Adapter soft state
+ */
+static void mvumi_free_cmds(struct mvumi_hba *mhba)
+{
+	struct mvumi_cmd *cmd;
+
+	while (!list_empty(&mhba->cmd_pool)) {
+		cmd = list_first_entry(&mhba->cmd_pool, struct mvumi_cmd,
+							queue_pointer);
+		list_del(&cmd->queue_pointer);
+		if (!(mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC))
+			kfree(cmd->frame);
+		kfree(cmd);
+	}
+}
+
+/**
+ * mvumi_alloc_cmds -	Allocates the command packets
+ * @mhba:		Adapter soft state
+ *
+ */
+static int mvumi_alloc_cmds(struct mvumi_hba *mhba)
+{
+	int i;
+	struct mvumi_cmd *cmd;
+
+	for (i = 0; i < mhba->max_io; i++) {
+		cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+		if (!cmd)
+			goto err_exit;
+
+		INIT_LIST_HEAD(&cmd->queue_pointer);
+		list_add_tail(&cmd->queue_pointer, &mhba->cmd_pool);
+		if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC) {
+			cmd->frame = mhba->ib_frame + i * mhba->ib_max_size;
+			cmd->frame_phys = mhba->ib_frame_phys
+						+ i * mhba->ib_max_size;
+		} else
+			cmd->frame = kzalloc(mhba->ib_max_size, GFP_KERNEL);
+		if (!cmd->frame)
+			goto err_exit;
+	}
+	return 0;
+
+err_exit:
+	dev_err(&mhba->pdev->dev,
+			"failed to allocate memory for cmd[0x%x].\n", i);
+	while (!list_empty(&mhba->cmd_pool)) {
+		cmd = list_first_entry(&mhba->cmd_pool, struct mvumi_cmd,
+						queue_pointer);
+		list_del(&cmd->queue_pointer);
+		if (!(mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC))
+			kfree(cmd->frame);
+		kfree(cmd);
+	}
+	return -ENOMEM;
+}
+
+static unsigned int mvumi_check_ib_list_9143(struct mvumi_hba *mhba)
+{
+	unsigned int ib_rp_reg;
+	struct mvumi_hw_regs *regs = mhba->regs;
+
+	ib_rp_reg = ioread32(mhba->regs->inb_read_pointer);
+
+	if (unlikely(((ib_rp_reg & regs->cl_slot_num_mask) ==
+			(mhba->ib_cur_slot & regs->cl_slot_num_mask)) &&
+			((ib_rp_reg & regs->cl_pointer_toggle)
+			 != (mhba->ib_cur_slot & regs->cl_pointer_toggle)))) {
+		dev_warn(&mhba->pdev->dev, "no free slot to use.\n");
+		return 0;
+	}
+	if (atomic_read(&mhba->fw_outstanding) >= mhba->max_io) {
+		dev_warn(&mhba->pdev->dev, "firmware io overflow.\n");
+		return 0;
+	} else {
+		return mhba->max_io - atomic_read(&mhba->fw_outstanding);
+	}
+}
+
+static unsigned int mvumi_check_ib_list_9580(struct mvumi_hba *mhba)
+{
+	unsigned int count;
+	if (atomic_read(&mhba->fw_outstanding) >= (mhba->max_io - 1))
+		return 0;
+	count = ioread32(mhba->ib_shadow);
+	if (count == 0xffff)
+		return 0;
+	return count;
+}
+
+static void mvumi_get_ib_list_entry(struct mvumi_hba *mhba, void **ib_entry)
+{
+	unsigned int cur_ib_entry;
+
+	cur_ib_entry = mhba->ib_cur_slot & mhba->regs->cl_slot_num_mask;
+	cur_ib_entry++;
+	if (cur_ib_entry >= mhba->list_num_io) {
+		cur_ib_entry -= mhba->list_num_io;
+		mhba->ib_cur_slot ^= mhba->regs->cl_pointer_toggle;
+	}
+	mhba->ib_cur_slot &= ~mhba->regs->cl_slot_num_mask;
+	mhba->ib_cur_slot |= (cur_ib_entry & mhba->regs->cl_slot_num_mask);
+	if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC) {
+		*ib_entry = mhba->ib_list + cur_ib_entry *
+				sizeof(struct mvumi_dyn_list_entry);
+	} else {
+		*ib_entry = mhba->ib_list + cur_ib_entry * mhba->ib_max_size;
+	}
+	atomic_inc(&mhba->fw_outstanding);
+}
+
+static void mvumi_send_ib_list_entry(struct mvumi_hba *mhba)
+{
+	iowrite32(0xffff, mhba->ib_shadow);
+	iowrite32(mhba->ib_cur_slot, mhba->regs->inb_write_pointer);
+}
+
+static char mvumi_check_ob_frame(struct mvumi_hba *mhba,
+		unsigned int cur_obf, struct mvumi_rsp_frame *p_outb_frame)
+{
+	unsigned short tag, request_id;
+
+	udelay(1);
+	p_outb_frame = mhba->ob_list + cur_obf * mhba->ob_max_size;
+	request_id = p_outb_frame->request_id;
+	tag = p_outb_frame->tag;
+	if (tag > mhba->tag_pool.size) {
+		dev_err(&mhba->pdev->dev, "ob frame data error\n");
+		return -1;
+	}
+	if (mhba->tag_cmd[tag] == NULL) {
+		dev_err(&mhba->pdev->dev, "tag[0x%x] with NO command\n", tag);
+		return -1;
+	} else if (mhba->tag_cmd[tag]->request_id != request_id &&
+						mhba->request_id_enabled) {
+			dev_err(&mhba->pdev->dev, "request ID from FW:0x%x,"
+					"cmd request ID:0x%x\n", request_id,
+					mhba->tag_cmd[tag]->request_id);
+			return -1;
+	}
+
+	return 0;
+}
+
+static int mvumi_check_ob_list_9143(struct mvumi_hba *mhba,
+			unsigned int *cur_obf, unsigned int *assign_obf_end)
+{
+	unsigned int ob_write, ob_write_shadow;
+	struct mvumi_hw_regs *regs = mhba->regs;
+
+	do {
+		ob_write = ioread32(regs->outb_copy_pointer);
+		ob_write_shadow = ioread32(mhba->ob_shadow);
+	} while ((ob_write & regs->cl_slot_num_mask) != ob_write_shadow);
+
+	*cur_obf = mhba->ob_cur_slot & mhba->regs->cl_slot_num_mask;
+	*assign_obf_end = ob_write & mhba->regs->cl_slot_num_mask;
+
+	if ((ob_write & regs->cl_pointer_toggle) !=
+			(mhba->ob_cur_slot & regs->cl_pointer_toggle)) {
+		*assign_obf_end += mhba->list_num_io;
+	}
+	return 0;
+}
+
+static int mvumi_check_ob_list_9580(struct mvumi_hba *mhba,
+			unsigned int *cur_obf, unsigned int *assign_obf_end)
+{
+	unsigned int ob_write;
+	struct mvumi_hw_regs *regs = mhba->regs;
+
+	ob_write = ioread32(regs->outb_read_pointer);
+	ob_write = ioread32(regs->outb_copy_pointer);
+	*cur_obf = mhba->ob_cur_slot & mhba->regs->cl_slot_num_mask;
+	*assign_obf_end = ob_write & mhba->regs->cl_slot_num_mask;
+	if (*assign_obf_end < *cur_obf)
+		*assign_obf_end += mhba->list_num_io;
+	else if (*assign_obf_end == *cur_obf)
+		return -1;
+	return 0;
+}
+
+static void mvumi_receive_ob_list_entry(struct mvumi_hba *mhba)
+{
+	unsigned int cur_obf, assign_obf_end, i;
+	struct mvumi_ob_data *ob_data;
+	struct mvumi_rsp_frame *p_outb_frame;
+	struct mvumi_hw_regs *regs = mhba->regs;
+
+	if (mhba->instancet->check_ob_list(mhba, &cur_obf, &assign_obf_end))
+		return;
+
+	for (i = (assign_obf_end - cur_obf); i != 0; i--) {
+		cur_obf++;
+		if (cur_obf >= mhba->list_num_io) {
+			cur_obf -= mhba->list_num_io;
+			mhba->ob_cur_slot ^= regs->cl_pointer_toggle;
+		}
+
+		p_outb_frame = mhba->ob_list + cur_obf * mhba->ob_max_size;
+
+		/* Copy pointer may point to entry in outbound list
+		*  before entry has valid data
+		*/
+		if (unlikely(p_outb_frame->tag > mhba->tag_pool.size ||
+			mhba->tag_cmd[p_outb_frame->tag] == NULL ||
+			p_outb_frame->request_id !=
+				mhba->tag_cmd[p_outb_frame->tag]->request_id))
+			if (mvumi_check_ob_frame(mhba, cur_obf, p_outb_frame))
+				continue;
+
+		if (!list_empty(&mhba->ob_data_list)) {
+			ob_data = (struct mvumi_ob_data *)
+				list_first_entry(&mhba->ob_data_list,
+					struct mvumi_ob_data, list);
+			list_del_init(&ob_data->list);
+		} else {
+			ob_data = NULL;
+			if (cur_obf == 0) {
+				cur_obf = mhba->list_num_io - 1;
+				mhba->ob_cur_slot ^= regs->cl_pointer_toggle;
+			} else
+				cur_obf -= 1;
+			break;
+		}
+
+		memcpy(ob_data->data, p_outb_frame, mhba->ob_max_size);
+		p_outb_frame->tag = 0xff;
+
+		list_add_tail(&ob_data->list, &mhba->free_ob_list);
+	}
+	mhba->ob_cur_slot &= ~regs->cl_slot_num_mask;
+	mhba->ob_cur_slot |= (cur_obf & regs->cl_slot_num_mask);
+	iowrite32(mhba->ob_cur_slot, regs->outb_read_pointer);
+}
+
+static void mvumi_reset(struct mvumi_hba *mhba)
+{
+	struct mvumi_hw_regs *regs = mhba->regs;
+
+	iowrite32(0, regs->enpointa_mask_reg);
+	if (ioread32(regs->arm_to_pciea_msg1) != HANDSHAKE_DONESTATE)
+		return;
+
+	iowrite32(DRBL_SOFT_RESET, regs->pciea_to_arm_drbl_reg);
+}
+
+static unsigned char mvumi_start(struct mvumi_hba *mhba);
+
+static int mvumi_wait_for_outstanding(struct mvumi_hba *mhba)
+{
+	mhba->fw_state = FW_STATE_ABORT;
+	mvumi_reset(mhba);
+
+	if (mvumi_start(mhba))
+		return FAILED;
+	else
+		return SUCCESS;
+}
+
+static int mvumi_wait_for_fw(struct mvumi_hba *mhba)
+{
+	struct mvumi_hw_regs *regs = mhba->regs;
+	u32 tmp;
+	unsigned long before;
+	before = jiffies;
+
+	iowrite32(0, regs->enpointa_mask_reg);
+	tmp = ioread32(regs->arm_to_pciea_msg1);
+	while (tmp != HANDSHAKE_READYSTATE) {
+		iowrite32(DRBL_MU_RESET, regs->pciea_to_arm_drbl_reg);
+		if (time_after(jiffies, before + FW_MAX_DELAY * HZ)) {
+			dev_err(&mhba->pdev->dev,
+				"FW reset failed [0x%x].\n", tmp);
+			return FAILED;
+		}
+
+		msleep(500);
+		rmb();
+		tmp = ioread32(regs->arm_to_pciea_msg1);
+	}
+
+	return SUCCESS;
+}
+
+static void mvumi_backup_bar_addr(struct mvumi_hba *mhba)
+{
+	unsigned char i;
+
+	for (i = 0; i < MAX_BASE_ADDRESS; i++) {
+		pci_read_config_dword(mhba->pdev, 0x10 + i * 4,
+						&mhba->pci_base[i]);
+	}
+}
+
+static void mvumi_restore_bar_addr(struct mvumi_hba *mhba)
+{
+	unsigned char i;
+
+	for (i = 0; i < MAX_BASE_ADDRESS; i++) {
+		if (mhba->pci_base[i])
+			pci_write_config_dword(mhba->pdev, 0x10 + i * 4,
+						mhba->pci_base[i]);
+	}
+}
+
+static int mvumi_pci_set_master(struct pci_dev *pdev)
+{
+	int ret = 0;
+
+	pci_set_master(pdev);
+
+	if (IS_DMA64) {
+		if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
+			ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+	} else
+		ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+
+	return ret;
+}
+
+static int mvumi_reset_host_9580(struct mvumi_hba *mhba)
+{
+	mhba->fw_state = FW_STATE_ABORT;
+
+	iowrite32(0, mhba->regs->reset_enable);
+	iowrite32(0xf, mhba->regs->reset_request);
+
+	iowrite32(0x10, mhba->regs->reset_enable);
+	iowrite32(0x10, mhba->regs->reset_request);
+	msleep(100);
+	pci_disable_device(mhba->pdev);
+
+	if (pci_enable_device(mhba->pdev)) {
+		dev_err(&mhba->pdev->dev, "enable device failed\n");
+		return FAILED;
+	}
+	if (mvumi_pci_set_master(mhba->pdev)) {
+		dev_err(&mhba->pdev->dev, "set master failed\n");
+		return FAILED;
+	}
+	mvumi_restore_bar_addr(mhba);
+	if (mvumi_wait_for_fw(mhba) == FAILED)
+		return FAILED;
+
+	return mvumi_wait_for_outstanding(mhba);
+}
+
+static int mvumi_reset_host_9143(struct mvumi_hba *mhba)
+{
+	return mvumi_wait_for_outstanding(mhba);
+}
+
+static int mvumi_host_reset(struct scsi_cmnd *scmd)
+{
+	struct mvumi_hba *mhba;
+
+	mhba = (struct mvumi_hba *) scmd->device->host->hostdata;
+
+	scmd_printk(KERN_NOTICE, scmd, "RESET -%u cmd=%x retries=%x\n",
+			scsi_cmd_to_rq(scmd)->tag, scmd->cmnd[0], scmd->retries);
+
+	return mhba->instancet->reset_host(mhba);
+}
+
+static int mvumi_issue_blocked_cmd(struct mvumi_hba *mhba,
+						struct mvumi_cmd *cmd)
+{
+	unsigned long flags;
+
+	cmd->cmd_status = REQ_STATUS_PENDING;
+
+	if (atomic_read(&cmd->sync_cmd)) {
+		dev_err(&mhba->pdev->dev,
+			"last blocked cmd not finished, sync_cmd = %d\n",
+						atomic_read(&cmd->sync_cmd));
+		BUG_ON(1);
+		return -1;
+	}
+	atomic_inc(&cmd->sync_cmd);
+	spin_lock_irqsave(mhba->shost->host_lock, flags);
+	mhba->instancet->fire_cmd(mhba, cmd);
+	spin_unlock_irqrestore(mhba->shost->host_lock, flags);
+
+	wait_event_timeout(mhba->int_cmd_wait_q,
+		(cmd->cmd_status != REQ_STATUS_PENDING),
+		MVUMI_INTERNAL_CMD_WAIT_TIME * HZ);
+
+	/* command timeout */
+	if (atomic_read(&cmd->sync_cmd)) {
+		spin_lock_irqsave(mhba->shost->host_lock, flags);
+		atomic_dec(&cmd->sync_cmd);
+		if (mhba->tag_cmd[cmd->frame->tag]) {
+			mhba->tag_cmd[cmd->frame->tag] = NULL;
+			dev_warn(&mhba->pdev->dev, "TIMEOUT:release tag [%d]\n",
+							cmd->frame->tag);
+			tag_release_one(mhba, &mhba->tag_pool, cmd->frame->tag);
+		}
+		if (!list_empty(&cmd->queue_pointer)) {
+			dev_warn(&mhba->pdev->dev,
+				"TIMEOUT:A internal command doesn't send!\n");
+			list_del_init(&cmd->queue_pointer);
+		} else
+			atomic_dec(&mhba->fw_outstanding);
+
+		spin_unlock_irqrestore(mhba->shost->host_lock, flags);
+	}
+	return 0;
+}
+
+static void mvumi_release_fw(struct mvumi_hba *mhba)
+{
+	mvumi_free_cmds(mhba);
+	mvumi_release_mem_resource(mhba);
+	mvumi_unmap_pci_addr(mhba->pdev, mhba->base_addr);
+	dma_free_coherent(&mhba->pdev->dev, HSP_MAX_SIZE,
+		mhba->handshake_page, mhba->handshake_page_phys);
+	kfree(mhba->regs);
+	pci_release_regions(mhba->pdev);
+}
+
+static unsigned char mvumi_flush_cache(struct mvumi_hba *mhba)
+{
+	struct mvumi_cmd *cmd;
+	struct mvumi_msg_frame *frame;
+	unsigned char device_id, retry = 0;
+	unsigned char bitcount = sizeof(unsigned char) * 8;
+
+	for (device_id = 0; device_id < mhba->max_target_id; device_id++) {
+		if (!(mhba->target_map[device_id / bitcount] &
+				(1 << (device_id % bitcount))))
+			continue;
+get_cmd:	cmd = mvumi_create_internal_cmd(mhba, 0);
+		if (!cmd) {
+			if (retry++ >= 5) {
+				dev_err(&mhba->pdev->dev, "failed to get memory"
+					" for internal flush cache cmd for "
+					"device %d", device_id);
+				retry = 0;
+				continue;
+			} else
+				goto get_cmd;
+		}
+		cmd->scmd = NULL;
+		cmd->cmd_status = REQ_STATUS_PENDING;
+		atomic_set(&cmd->sync_cmd, 0);
+		frame = cmd->frame;
+		frame->req_function = CL_FUN_SCSI_CMD;
+		frame->device_id = device_id;
+		frame->cmd_flag = CMD_FLAG_NON_DATA;
+		frame->data_transfer_length = 0;
+		frame->cdb_length = MAX_COMMAND_SIZE;
+		memset(frame->cdb, 0, MAX_COMMAND_SIZE);
+		frame->cdb[0] = SCSI_CMD_MARVELL_SPECIFIC;
+		frame->cdb[1] = CDB_CORE_MODULE;
+		frame->cdb[2] = CDB_CORE_SHUTDOWN;
+
+		mvumi_issue_blocked_cmd(mhba, cmd);
+		if (cmd->cmd_status != SAM_STAT_GOOD) {
+			dev_err(&mhba->pdev->dev,
+				"device %d flush cache failed, status=0x%x.\n",
+				device_id, cmd->cmd_status);
+		}
+
+		mvumi_delete_internal_cmd(mhba, cmd);
+	}
+	return 0;
+}
+
+static unsigned char
+mvumi_calculate_checksum(struct mvumi_hs_header *p_header,
+							unsigned short len)
+{
+	unsigned char *ptr;
+	unsigned char ret = 0, i;
+
+	ptr = (unsigned char *) p_header->frame_content;
+	for (i = 0; i < len; i++) {
+		ret ^= *ptr;
+		ptr++;
+	}
+
+	return ret;
+}
+
+static void mvumi_hs_build_page(struct mvumi_hba *mhba,
+				struct mvumi_hs_header *hs_header)
+{
+	struct mvumi_hs_page2 *hs_page2;
+	struct mvumi_hs_page4 *hs_page4;
+	struct mvumi_hs_page3 *hs_page3;
+	u64 time;
+	u64 local_time;
+
+	switch (hs_header->page_code) {
+	case HS_PAGE_HOST_INFO:
+		hs_page2 = (struct mvumi_hs_page2 *) hs_header;
+		hs_header->frame_length = sizeof(*hs_page2) - 4;
+		memset(hs_header->frame_content, 0, hs_header->frame_length);
+		hs_page2->host_type = 3; /* 3 mean linux*/
+		if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC)
+			hs_page2->host_cap = 0x08;/* host dynamic source mode */
+		hs_page2->host_ver.ver_major = VER_MAJOR;
+		hs_page2->host_ver.ver_minor = VER_MINOR;
+		hs_page2->host_ver.ver_oem = VER_OEM;
+		hs_page2->host_ver.ver_build = VER_BUILD;
+		hs_page2->system_io_bus = 0;
+		hs_page2->slot_number = 0;
+		hs_page2->intr_level = 0;
+		hs_page2->intr_vector = 0;
+		time = ktime_get_real_seconds();
+		local_time = (time - (sys_tz.tz_minuteswest * 60));
+		hs_page2->seconds_since1970 = local_time;
+		hs_header->checksum = mvumi_calculate_checksum(hs_header,
+						hs_header->frame_length);
+		break;
+
+	case HS_PAGE_FIRM_CTL:
+		hs_page3 = (struct mvumi_hs_page3 *) hs_header;
+		hs_header->frame_length = sizeof(*hs_page3) - 4;
+		memset(hs_header->frame_content, 0, hs_header->frame_length);
+		hs_header->checksum = mvumi_calculate_checksum(hs_header,
+						hs_header->frame_length);
+		break;
+
+	case HS_PAGE_CL_INFO:
+		hs_page4 = (struct mvumi_hs_page4 *) hs_header;
+		hs_header->frame_length = sizeof(*hs_page4) - 4;
+		memset(hs_header->frame_content, 0, hs_header->frame_length);
+		hs_page4->ib_baseaddr_l = lower_32_bits(mhba->ib_list_phys);
+		hs_page4->ib_baseaddr_h = upper_32_bits(mhba->ib_list_phys);
+
+		hs_page4->ob_baseaddr_l = lower_32_bits(mhba->ob_list_phys);
+		hs_page4->ob_baseaddr_h = upper_32_bits(mhba->ob_list_phys);
+		hs_page4->ib_entry_size = mhba->ib_max_size_setting;
+		hs_page4->ob_entry_size = mhba->ob_max_size_setting;
+		if (mhba->hba_capability
+			& HS_CAPABILITY_NEW_PAGE_IO_DEPTH_DEF) {
+			hs_page4->ob_depth = find_first_bit((unsigned long *)
+							    &mhba->list_num_io,
+							    BITS_PER_LONG);
+			hs_page4->ib_depth = find_first_bit((unsigned long *)
+							    &mhba->list_num_io,
+							    BITS_PER_LONG);
+		} else {
+			hs_page4->ob_depth = (u8) mhba->list_num_io;
+			hs_page4->ib_depth = (u8) mhba->list_num_io;
+		}
+		hs_header->checksum = mvumi_calculate_checksum(hs_header,
+						hs_header->frame_length);
+		break;
+
+	default:
+		dev_err(&mhba->pdev->dev, "cannot build page, code[0x%x]\n",
+			hs_header->page_code);
+		break;
+	}
+}
+
+/**
+ * mvumi_init_data -	Initialize requested date for FW
+ * @mhba:			Adapter soft state
+ */
+static int mvumi_init_data(struct mvumi_hba *mhba)
+{
+	struct mvumi_ob_data *ob_pool;
+	struct mvumi_res *res_mgnt;
+	unsigned int tmp_size, offset, i;
+	void *virmem, *v;
+	dma_addr_t p;
+
+	if (mhba->fw_flag & MVUMI_FW_ALLOC)
+		return 0;
+
+	tmp_size = mhba->ib_max_size * mhba->max_io;
+	if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC)
+		tmp_size += sizeof(struct mvumi_dyn_list_entry) * mhba->max_io;
+
+	tmp_size += 128 + mhba->ob_max_size * mhba->max_io;
+	tmp_size += 8 + sizeof(u32)*2 + 16;
+
+	res_mgnt = mvumi_alloc_mem_resource(mhba,
+					RESOURCE_UNCACHED_MEMORY, tmp_size);
+	if (!res_mgnt) {
+		dev_err(&mhba->pdev->dev,
+			"failed to allocate memory for inbound list\n");
+		goto fail_alloc_dma_buf;
+	}
+
+	p = res_mgnt->bus_addr;
+	v = res_mgnt->virt_addr;
+	/* ib_list */
+	offset = round_up(p, 128) - p;
+	p += offset;
+	v += offset;
+	mhba->ib_list = v;
+	mhba->ib_list_phys = p;
+	if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC) {
+		v += sizeof(struct mvumi_dyn_list_entry) * mhba->max_io;
+		p += sizeof(struct mvumi_dyn_list_entry) * mhba->max_io;
+		mhba->ib_frame = v;
+		mhba->ib_frame_phys = p;
+	}
+	v += mhba->ib_max_size * mhba->max_io;
+	p += mhba->ib_max_size * mhba->max_io;
+
+	/* ib shadow */
+	offset = round_up(p, 8) - p;
+	p += offset;
+	v += offset;
+	mhba->ib_shadow = v;
+	mhba->ib_shadow_phys = p;
+	p += sizeof(u32)*2;
+	v += sizeof(u32)*2;
+	/* ob shadow */
+	if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9580) {
+		offset = round_up(p, 8) - p;
+		p += offset;
+		v += offset;
+		mhba->ob_shadow = v;
+		mhba->ob_shadow_phys = p;
+		p += 8;
+		v += 8;
+	} else {
+		offset = round_up(p, 4) - p;
+		p += offset;
+		v += offset;
+		mhba->ob_shadow = v;
+		mhba->ob_shadow_phys = p;
+		p += 4;
+		v += 4;
+	}
+
+	/* ob list */
+	offset = round_up(p, 128) - p;
+	p += offset;
+	v += offset;
+
+	mhba->ob_list = v;
+	mhba->ob_list_phys = p;
+
+	/* ob data pool */
+	tmp_size = mhba->max_io * (mhba->ob_max_size + sizeof(*ob_pool));
+	tmp_size = round_up(tmp_size, 8);
+
+	res_mgnt = mvumi_alloc_mem_resource(mhba,
+				RESOURCE_CACHED_MEMORY, tmp_size);
+	if (!res_mgnt) {
+		dev_err(&mhba->pdev->dev,
+			"failed to allocate memory for outbound data buffer\n");
+		goto fail_alloc_dma_buf;
+	}
+	virmem = res_mgnt->virt_addr;
+
+	for (i = mhba->max_io; i != 0; i--) {
+		ob_pool = (struct mvumi_ob_data *) virmem;
+		list_add_tail(&ob_pool->list, &mhba->ob_data_list);
+		virmem += mhba->ob_max_size + sizeof(*ob_pool);
+	}
+
+	tmp_size = sizeof(unsigned short) * mhba->max_io +
+				sizeof(struct mvumi_cmd *) * mhba->max_io;
+	tmp_size += round_up(mhba->max_target_id, sizeof(unsigned char) * 8) /
+						(sizeof(unsigned char) * 8);
+
+	res_mgnt = mvumi_alloc_mem_resource(mhba,
+				RESOURCE_CACHED_MEMORY, tmp_size);
+	if (!res_mgnt) {
+		dev_err(&mhba->pdev->dev,
+			"failed to allocate memory for tag and target map\n");
+		goto fail_alloc_dma_buf;
+	}
+
+	virmem = res_mgnt->virt_addr;
+	mhba->tag_pool.stack = virmem;
+	mhba->tag_pool.size = mhba->max_io;
+	tag_init(&mhba->tag_pool, mhba->max_io);
+	virmem += sizeof(unsigned short) * mhba->max_io;
+
+	mhba->tag_cmd = virmem;
+	virmem += sizeof(struct mvumi_cmd *) * mhba->max_io;
+
+	mhba->target_map = virmem;
+
+	mhba->fw_flag |= MVUMI_FW_ALLOC;
+	return 0;
+
+fail_alloc_dma_buf:
+	mvumi_release_mem_resource(mhba);
+	return -1;
+}
+
+static int mvumi_hs_process_page(struct mvumi_hba *mhba,
+				struct mvumi_hs_header *hs_header)
+{
+	struct mvumi_hs_page1 *hs_page1;
+	unsigned char page_checksum;
+
+	page_checksum = mvumi_calculate_checksum(hs_header,
+						hs_header->frame_length);
+	if (page_checksum != hs_header->checksum) {
+		dev_err(&mhba->pdev->dev, "checksum error\n");
+		return -1;
+	}
+
+	switch (hs_header->page_code) {
+	case HS_PAGE_FIRM_CAP:
+		hs_page1 = (struct mvumi_hs_page1 *) hs_header;
+
+		mhba->max_io = hs_page1->max_io_support;
+		mhba->list_num_io = hs_page1->cl_inout_list_depth;
+		mhba->max_transfer_size = hs_page1->max_transfer_size;
+		mhba->max_target_id = hs_page1->max_devices_support;
+		mhba->hba_capability = hs_page1->capability;
+		mhba->ib_max_size_setting = hs_page1->cl_in_max_entry_size;
+		mhba->ib_max_size = (1 << hs_page1->cl_in_max_entry_size) << 2;
+
+		mhba->ob_max_size_setting = hs_page1->cl_out_max_entry_size;
+		mhba->ob_max_size = (1 << hs_page1->cl_out_max_entry_size) << 2;
+
+		dev_dbg(&mhba->pdev->dev, "FW version:%d\n",
+						hs_page1->fw_ver.ver_build);
+
+		if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_COMPACT_SG)
+			mhba->eot_flag = 22;
+		else
+			mhba->eot_flag = 27;
+		if (mhba->hba_capability & HS_CAPABILITY_NEW_PAGE_IO_DEPTH_DEF)
+			mhba->list_num_io = 1 << hs_page1->cl_inout_list_depth;
+		break;
+	default:
+		dev_err(&mhba->pdev->dev, "handshake: page code error\n");
+		return -1;
+	}
+	return 0;
+}
+
+/**
+ * mvumi_handshake -	Move the FW to READY state
+ * @mhba:				Adapter soft state
+ *
+ * During the initialization, FW passes can potentially be in any one of
+ * several possible states. If the FW in operational, waiting-for-handshake
+ * states, driver must take steps to bring it to ready state. Otherwise, it
+ * has to wait for the ready state.
+ */
+static int mvumi_handshake(struct mvumi_hba *mhba)
+{
+	unsigned int hs_state, tmp, hs_fun;
+	struct mvumi_hs_header *hs_header;
+	struct mvumi_hw_regs *regs = mhba->regs;
+
+	if (mhba->fw_state == FW_STATE_STARTING)
+		hs_state = HS_S_START;
+	else {
+		tmp = ioread32(regs->arm_to_pciea_msg0);
+		hs_state = HS_GET_STATE(tmp);
+		dev_dbg(&mhba->pdev->dev, "handshake state[0x%x].\n", hs_state);
+		if (HS_GET_STATUS(tmp) != HS_STATUS_OK) {
+			mhba->fw_state = FW_STATE_STARTING;
+			return -1;
+		}
+	}
+
+	hs_fun = 0;
+	switch (hs_state) {
+	case HS_S_START:
+		mhba->fw_state = FW_STATE_HANDSHAKING;
+		HS_SET_STATUS(hs_fun, HS_STATUS_OK);
+		HS_SET_STATE(hs_fun, HS_S_RESET);
+		iowrite32(HANDSHAKE_SIGNATURE, regs->pciea_to_arm_msg1);
+		iowrite32(hs_fun, regs->pciea_to_arm_msg0);
+		iowrite32(DRBL_HANDSHAKE, regs->pciea_to_arm_drbl_reg);
+		break;
+
+	case HS_S_RESET:
+		iowrite32(lower_32_bits(mhba->handshake_page_phys),
+					regs->pciea_to_arm_msg1);
+		iowrite32(upper_32_bits(mhba->handshake_page_phys),
+					regs->arm_to_pciea_msg1);
+		HS_SET_STATUS(hs_fun, HS_STATUS_OK);
+		HS_SET_STATE(hs_fun, HS_S_PAGE_ADDR);
+		iowrite32(hs_fun, regs->pciea_to_arm_msg0);
+		iowrite32(DRBL_HANDSHAKE, regs->pciea_to_arm_drbl_reg);
+		break;
+
+	case HS_S_PAGE_ADDR:
+	case HS_S_QUERY_PAGE:
+	case HS_S_SEND_PAGE:
+		hs_header = (struct mvumi_hs_header *) mhba->handshake_page;
+		if (hs_header->page_code == HS_PAGE_FIRM_CAP) {
+			mhba->hba_total_pages =
+			((struct mvumi_hs_page1 *) hs_header)->total_pages;
+
+			if (mhba->hba_total_pages == 0)
+				mhba->hba_total_pages = HS_PAGE_TOTAL-1;
+		}
+
+		if (hs_state == HS_S_QUERY_PAGE) {
+			if (mvumi_hs_process_page(mhba, hs_header)) {
+				HS_SET_STATE(hs_fun, HS_S_ABORT);
+				return -1;
+			}
+			if (mvumi_init_data(mhba)) {
+				HS_SET_STATE(hs_fun, HS_S_ABORT);
+				return -1;
+			}
+		} else if (hs_state == HS_S_PAGE_ADDR) {
+			hs_header->page_code = 0;
+			mhba->hba_total_pages = HS_PAGE_TOTAL-1;
+		}
+
+		if ((hs_header->page_code + 1) <= mhba->hba_total_pages) {
+			hs_header->page_code++;
+			if (hs_header->page_code != HS_PAGE_FIRM_CAP) {
+				mvumi_hs_build_page(mhba, hs_header);
+				HS_SET_STATE(hs_fun, HS_S_SEND_PAGE);
+			} else
+				HS_SET_STATE(hs_fun, HS_S_QUERY_PAGE);
+		} else
+			HS_SET_STATE(hs_fun, HS_S_END);
+
+		HS_SET_STATUS(hs_fun, HS_STATUS_OK);
+		iowrite32(hs_fun, regs->pciea_to_arm_msg0);
+		iowrite32(DRBL_HANDSHAKE, regs->pciea_to_arm_drbl_reg);
+		break;
+
+	case HS_S_END:
+		/* Set communication list ISR */
+		tmp = ioread32(regs->enpointa_mask_reg);
+		tmp |= regs->int_comaout | regs->int_comaerr;
+		iowrite32(tmp, regs->enpointa_mask_reg);
+		iowrite32(mhba->list_num_io, mhba->ib_shadow);
+		/* Set InBound List Available count shadow */
+		iowrite32(lower_32_bits(mhba->ib_shadow_phys),
+					regs->inb_aval_count_basel);
+		iowrite32(upper_32_bits(mhba->ib_shadow_phys),
+					regs->inb_aval_count_baseh);
+
+		if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9143) {
+			/* Set OutBound List Available count shadow */
+			iowrite32((mhba->list_num_io-1) |
+							regs->cl_pointer_toggle,
+							mhba->ob_shadow);
+			iowrite32(lower_32_bits(mhba->ob_shadow_phys),
+							regs->outb_copy_basel);
+			iowrite32(upper_32_bits(mhba->ob_shadow_phys),
+							regs->outb_copy_baseh);
+		}
+
+		mhba->ib_cur_slot = (mhba->list_num_io - 1) |
+							regs->cl_pointer_toggle;
+		mhba->ob_cur_slot = (mhba->list_num_io - 1) |
+							regs->cl_pointer_toggle;
+		mhba->fw_state = FW_STATE_STARTED;
+
+		break;
+	default:
+		dev_err(&mhba->pdev->dev, "unknown handshake state [0x%x].\n",
+								hs_state);
+		return -1;
+	}
+	return 0;
+}
+
+static unsigned char mvumi_handshake_event(struct mvumi_hba *mhba)
+{
+	unsigned int isr_status;
+	unsigned long before;
+
+	before = jiffies;
+	mvumi_handshake(mhba);
+	do {
+		isr_status = mhba->instancet->read_fw_status_reg(mhba);
+
+		if (mhba->fw_state == FW_STATE_STARTED)
+			return 0;
+		if (time_after(jiffies, before + FW_MAX_DELAY * HZ)) {
+			dev_err(&mhba->pdev->dev,
+				"no handshake response at state 0x%x.\n",
+				  mhba->fw_state);
+			dev_err(&mhba->pdev->dev,
+				"isr : global=0x%x,status=0x%x.\n",
+					mhba->global_isr, isr_status);
+			return -1;
+		}
+		rmb();
+		usleep_range(1000, 2000);
+	} while (!(isr_status & DRBL_HANDSHAKE_ISR));
+
+	return 0;
+}
+
+static unsigned char mvumi_check_handshake(struct mvumi_hba *mhba)
+{
+	unsigned int tmp;
+	unsigned long before;
+
+	before = jiffies;
+	tmp = ioread32(mhba->regs->arm_to_pciea_msg1);
+	while ((tmp != HANDSHAKE_READYSTATE) && (tmp != HANDSHAKE_DONESTATE)) {
+		if (tmp != HANDSHAKE_READYSTATE)
+			iowrite32(DRBL_MU_RESET,
+					mhba->regs->pciea_to_arm_drbl_reg);
+		if (time_after(jiffies, before + FW_MAX_DELAY * HZ)) {
+			dev_err(&mhba->pdev->dev,
+				"invalid signature [0x%x].\n", tmp);
+			return -1;
+		}
+		usleep_range(1000, 2000);
+		rmb();
+		tmp = ioread32(mhba->regs->arm_to_pciea_msg1);
+	}
+
+	mhba->fw_state = FW_STATE_STARTING;
+	dev_dbg(&mhba->pdev->dev, "start firmware handshake...\n");
+	do {
+		if (mvumi_handshake_event(mhba)) {
+			dev_err(&mhba->pdev->dev,
+					"handshake failed at state 0x%x.\n",
+						mhba->fw_state);
+			return -1;
+		}
+	} while (mhba->fw_state != FW_STATE_STARTED);
+
+	dev_dbg(&mhba->pdev->dev, "firmware handshake done\n");
+
+	return 0;
+}
+
+static unsigned char mvumi_start(struct mvumi_hba *mhba)
+{
+	unsigned int tmp;
+	struct mvumi_hw_regs *regs = mhba->regs;
+
+	/* clear Door bell */
+	tmp = ioread32(regs->arm_to_pciea_drbl_reg);
+	iowrite32(tmp, regs->arm_to_pciea_drbl_reg);
+
+	iowrite32(regs->int_drbl_int_mask, regs->arm_to_pciea_mask_reg);
+	tmp = ioread32(regs->enpointa_mask_reg) | regs->int_dl_cpu2pciea;
+	iowrite32(tmp, regs->enpointa_mask_reg);
+	msleep(100);
+	if (mvumi_check_handshake(mhba))
+		return -1;
+
+	return 0;
+}
+
+/**
+ * mvumi_complete_cmd -	Completes a command
+ * @mhba:			Adapter soft state
+ * @cmd:			Command to be completed
+ * @ob_frame:			Command response
+ */
+static void mvumi_complete_cmd(struct mvumi_hba *mhba, struct mvumi_cmd *cmd,
+					struct mvumi_rsp_frame *ob_frame)
+{
+	struct scsi_cmnd *scmd = cmd->scmd;
+
+	mvumi_priv(cmd->scmd)->cmd_priv = NULL;
+	scmd->result = ob_frame->req_status;
+
+	switch (ob_frame->req_status) {
+	case SAM_STAT_GOOD:
+		scmd->result |= DID_OK << 16;
+		break;
+	case SAM_STAT_BUSY:
+		scmd->result |= DID_BUS_BUSY << 16;
+		break;
+	case SAM_STAT_CHECK_CONDITION:
+		scmd->result |= (DID_OK << 16);
+		if (ob_frame->rsp_flag & CL_RSP_FLAG_SENSEDATA) {
+			memcpy(cmd->scmd->sense_buffer, ob_frame->payload,
+				sizeof(struct mvumi_sense_data));
+		}
+		break;
+	default:
+		scmd->result |= (DID_ABORT << 16);
+		break;
+	}
+
+	if (scsi_bufflen(scmd))
+		dma_unmap_sg(&mhba->pdev->dev, scsi_sglist(scmd),
+			     scsi_sg_count(scmd),
+			     scmd->sc_data_direction);
+	scsi_done(scmd);
+	mvumi_return_cmd(mhba, cmd);
+}
+
+static void mvumi_complete_internal_cmd(struct mvumi_hba *mhba,
+						struct mvumi_cmd *cmd,
+					struct mvumi_rsp_frame *ob_frame)
+{
+	if (atomic_read(&cmd->sync_cmd)) {
+		cmd->cmd_status = ob_frame->req_status;
+
+		if ((ob_frame->req_status == SAM_STAT_CHECK_CONDITION) &&
+				(ob_frame->rsp_flag & CL_RSP_FLAG_SENSEDATA) &&
+				cmd->data_buf) {
+			memcpy(cmd->data_buf, ob_frame->payload,
+					sizeof(struct mvumi_sense_data));
+		}
+		atomic_dec(&cmd->sync_cmd);
+		wake_up(&mhba->int_cmd_wait_q);
+	}
+}
+
+static void mvumi_show_event(struct mvumi_hba *mhba,
+			struct mvumi_driver_event *ptr)
+{
+	unsigned int i;
+
+	dev_warn(&mhba->pdev->dev,
+		"Event[0x%x] id[0x%x] severity[0x%x] device id[0x%x]\n",
+		ptr->sequence_no, ptr->event_id, ptr->severity, ptr->device_id);
+	if (ptr->param_count) {
+		printk(KERN_WARNING "Event param(len 0x%x): ",
+						ptr->param_count);
+		for (i = 0; i < ptr->param_count; i++)
+			printk(KERN_WARNING "0x%x ", ptr->params[i]);
+
+		printk(KERN_WARNING "\n");
+	}
+
+	if (ptr->sense_data_length) {
+		printk(KERN_WARNING "Event sense data(len 0x%x): ",
+						ptr->sense_data_length);
+		for (i = 0; i < ptr->sense_data_length; i++)
+			printk(KERN_WARNING "0x%x ", ptr->sense_data[i]);
+		printk(KERN_WARNING "\n");
+	}
+}
+
+static int mvumi_handle_hotplug(struct mvumi_hba *mhba, u16 devid, int status)
+{
+	struct scsi_device *sdev;
+	int ret = -1;
+
+	if (status == DEVICE_OFFLINE) {
+		sdev = scsi_device_lookup(mhba->shost, 0, devid, 0);
+		if (sdev) {
+			dev_dbg(&mhba->pdev->dev, "remove disk %d-%d-%d.\n", 0,
+								sdev->id, 0);
+			scsi_remove_device(sdev);
+			scsi_device_put(sdev);
+			ret = 0;
+		} else
+			dev_err(&mhba->pdev->dev, " no disk[%d] to remove\n",
+									devid);
+	} else if (status == DEVICE_ONLINE) {
+		sdev = scsi_device_lookup(mhba->shost, 0, devid, 0);
+		if (!sdev) {
+			scsi_add_device(mhba->shost, 0, devid, 0);
+			dev_dbg(&mhba->pdev->dev, " add disk %d-%d-%d.\n", 0,
+								devid, 0);
+			ret = 0;
+		} else {
+			dev_err(&mhba->pdev->dev, " don't add disk %d-%d-%d.\n",
+								0, devid, 0);
+			scsi_device_put(sdev);
+		}
+	}
+	return ret;
+}
+
+static u64 mvumi_inquiry(struct mvumi_hba *mhba,
+	unsigned int id, struct mvumi_cmd *cmd)
+{
+	struct mvumi_msg_frame *frame;
+	u64 wwid = 0;
+	int cmd_alloc = 0;
+	int data_buf_len = 64;
+
+	if (!cmd) {
+		cmd = mvumi_create_internal_cmd(mhba, data_buf_len);
+		if (cmd)
+			cmd_alloc = 1;
+		else
+			return 0;
+	} else {
+		memset(cmd->data_buf, 0, data_buf_len);
+	}
+	cmd->scmd = NULL;
+	cmd->cmd_status = REQ_STATUS_PENDING;
+	atomic_set(&cmd->sync_cmd, 0);
+	frame = cmd->frame;
+	frame->device_id = (u16) id;
+	frame->cmd_flag = CMD_FLAG_DATA_IN;
+	frame->req_function = CL_FUN_SCSI_CMD;
+	frame->cdb_length = 6;
+	frame->data_transfer_length = MVUMI_INQUIRY_LENGTH;
+	memset(frame->cdb, 0, frame->cdb_length);
+	frame->cdb[0] = INQUIRY;
+	frame->cdb[4] = frame->data_transfer_length;
+
+	mvumi_issue_blocked_cmd(mhba, cmd);
+
+	if (cmd->cmd_status == SAM_STAT_GOOD) {
+		if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9143)
+			wwid = id + 1;
+		else
+			memcpy((void *)&wwid,
+			       (cmd->data_buf + MVUMI_INQUIRY_UUID_OFF),
+			       MVUMI_INQUIRY_UUID_LEN);
+		dev_dbg(&mhba->pdev->dev,
+			"inquiry device(0:%d:0) wwid(%llx)\n", id, wwid);
+	} else {
+		wwid = 0;
+	}
+	if (cmd_alloc)
+		mvumi_delete_internal_cmd(mhba, cmd);
+
+	return wwid;
+}
+
+static void mvumi_detach_devices(struct mvumi_hba *mhba)
+{
+	struct mvumi_device *mv_dev = NULL , *dev_next;
+	struct scsi_device *sdev = NULL;
+
+	mutex_lock(&mhba->device_lock);
+
+	/* detach Hard Disk */
+	list_for_each_entry_safe(mv_dev, dev_next,
+		&mhba->shost_dev_list, list) {
+		mvumi_handle_hotplug(mhba, mv_dev->id, DEVICE_OFFLINE);
+		list_del_init(&mv_dev->list);
+		dev_dbg(&mhba->pdev->dev, "release device(0:%d:0) wwid(%llx)\n",
+			mv_dev->id, mv_dev->wwid);
+		kfree(mv_dev);
+	}
+	list_for_each_entry_safe(mv_dev, dev_next, &mhba->mhba_dev_list, list) {
+		list_del_init(&mv_dev->list);
+		dev_dbg(&mhba->pdev->dev, "release device(0:%d:0) wwid(%llx)\n",
+			mv_dev->id, mv_dev->wwid);
+		kfree(mv_dev);
+	}
+
+	/* detach virtual device */
+	if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9580)
+		sdev = scsi_device_lookup(mhba->shost, 0,
+						mhba->max_target_id - 1, 0);
+
+	if (sdev) {
+		scsi_remove_device(sdev);
+		scsi_device_put(sdev);
+	}
+
+	mutex_unlock(&mhba->device_lock);
+}
+
+static void mvumi_rescan_devices(struct mvumi_hba *mhba, int id)
+{
+	struct scsi_device *sdev;
+
+	sdev = scsi_device_lookup(mhba->shost, 0, id, 0);
+	if (sdev) {
+		scsi_rescan_device(sdev);
+		scsi_device_put(sdev);
+	}
+}
+
+static int mvumi_match_devices(struct mvumi_hba *mhba, int id, u64 wwid)
+{
+	struct mvumi_device *mv_dev = NULL;
+
+	list_for_each_entry(mv_dev, &mhba->shost_dev_list, list) {
+		if (mv_dev->wwid == wwid) {
+			if (mv_dev->id != id) {
+				dev_err(&mhba->pdev->dev,
+					"%s has same wwid[%llx] ,"
+					" but different id[%d %d]\n",
+					__func__, mv_dev->wwid, mv_dev->id, id);
+				return -1;
+			} else {
+				if (mhba->pdev->device ==
+						PCI_DEVICE_ID_MARVELL_MV9143)
+					mvumi_rescan_devices(mhba, id);
+				return 1;
+			}
+		}
+	}
+	return 0;
+}
+
+static void mvumi_remove_devices(struct mvumi_hba *mhba, int id)
+{
+	struct mvumi_device *mv_dev = NULL, *dev_next;
+
+	list_for_each_entry_safe(mv_dev, dev_next,
+				&mhba->shost_dev_list, list) {
+		if (mv_dev->id == id) {
+			dev_dbg(&mhba->pdev->dev,
+				"detach device(0:%d:0) wwid(%llx) from HOST\n",
+				mv_dev->id, mv_dev->wwid);
+			mvumi_handle_hotplug(mhba, mv_dev->id, DEVICE_OFFLINE);
+			list_del_init(&mv_dev->list);
+			kfree(mv_dev);
+		}
+	}
+}
+
+static int mvumi_probe_devices(struct mvumi_hba *mhba)
+{
+	int id, maxid;
+	u64 wwid = 0;
+	struct mvumi_device *mv_dev = NULL;
+	struct mvumi_cmd *cmd = NULL;
+	int found = 0;
+
+	cmd = mvumi_create_internal_cmd(mhba, 64);
+	if (!cmd)
+		return -1;
+
+	if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9143)
+		maxid = mhba->max_target_id;
+	else
+		maxid = mhba->max_target_id - 1;
+
+	for (id = 0; id < maxid; id++) {
+		wwid = mvumi_inquiry(mhba, id, cmd);
+		if (!wwid) {
+			/* device no response, remove it */
+			mvumi_remove_devices(mhba, id);
+		} else {
+			/* device response, add it */
+			found = mvumi_match_devices(mhba, id, wwid);
+			if (!found) {
+				mvumi_remove_devices(mhba, id);
+				mv_dev = kzalloc(sizeof(struct mvumi_device),
+								GFP_KERNEL);
+				if (!mv_dev) {
+					dev_err(&mhba->pdev->dev,
+						"%s alloc mv_dev failed\n",
+						__func__);
+					continue;
+				}
+				mv_dev->id = id;
+				mv_dev->wwid = wwid;
+				mv_dev->sdev = NULL;
+				INIT_LIST_HEAD(&mv_dev->list);
+				list_add_tail(&mv_dev->list,
+					      &mhba->mhba_dev_list);
+				dev_dbg(&mhba->pdev->dev,
+					"probe a new device(0:%d:0)"
+					" wwid(%llx)\n", id, mv_dev->wwid);
+			} else if (found == -1)
+				return -1;
+			else
+				continue;
+		}
+	}
+
+	if (cmd)
+		mvumi_delete_internal_cmd(mhba, cmd);
+
+	return 0;
+}
+
+static int mvumi_rescan_bus(void *data)
+{
+	int ret = 0;
+	struct mvumi_hba *mhba = (struct mvumi_hba *) data;
+	struct mvumi_device *mv_dev = NULL , *dev_next;
+
+	while (!kthread_should_stop()) {
+
+		set_current_state(TASK_INTERRUPTIBLE);
+		if (!atomic_read(&mhba->pnp_count))
+			schedule();
+		msleep(1000);
+		atomic_set(&mhba->pnp_count, 0);
+		__set_current_state(TASK_RUNNING);
+
+		mutex_lock(&mhba->device_lock);
+		ret = mvumi_probe_devices(mhba);
+		if (!ret) {
+			list_for_each_entry_safe(mv_dev, dev_next,
+						 &mhba->mhba_dev_list, list) {
+				if (mvumi_handle_hotplug(mhba, mv_dev->id,
+							 DEVICE_ONLINE)) {
+					dev_err(&mhba->pdev->dev,
+						"%s add device(0:%d:0) failed"
+						"wwid(%llx) has exist\n",
+						__func__,
+						mv_dev->id, mv_dev->wwid);
+					list_del_init(&mv_dev->list);
+					kfree(mv_dev);
+				} else {
+					list_move_tail(&mv_dev->list,
+						       &mhba->shost_dev_list);
+				}
+			}
+		}
+		mutex_unlock(&mhba->device_lock);
+	}
+	return 0;
+}
+
+static void mvumi_proc_msg(struct mvumi_hba *mhba,
+					struct mvumi_hotplug_event *param)
+{
+	u16 size = param->size;
+	const unsigned long *ar_bitmap;
+	const unsigned long *re_bitmap;
+	int index;
+
+	if (mhba->fw_flag & MVUMI_FW_ATTACH) {
+		index = -1;
+		ar_bitmap = (const unsigned long *) param->bitmap;
+		re_bitmap = (const unsigned long *) &param->bitmap[size >> 3];
+
+		mutex_lock(&mhba->sas_discovery_mutex);
+		do {
+			index = find_next_zero_bit(ar_bitmap, size, index + 1);
+			if (index >= size)
+				break;
+			mvumi_handle_hotplug(mhba, index, DEVICE_ONLINE);
+		} while (1);
+
+		index = -1;
+		do {
+			index = find_next_zero_bit(re_bitmap, size, index + 1);
+			if (index >= size)
+				break;
+			mvumi_handle_hotplug(mhba, index, DEVICE_OFFLINE);
+		} while (1);
+		mutex_unlock(&mhba->sas_discovery_mutex);
+	}
+}
+
+static void mvumi_notification(struct mvumi_hba *mhba, u8 msg, void *buffer)
+{
+	if (msg == APICDB1_EVENT_GETEVENT) {
+		int i, count;
+		struct mvumi_driver_event *param = NULL;
+		struct mvumi_event_req *er = buffer;
+		count = er->count;
+		if (count > MAX_EVENTS_RETURNED) {
+			dev_err(&mhba->pdev->dev, "event count[0x%x] is bigger"
+					" than max event count[0x%x].\n",
+					count, MAX_EVENTS_RETURNED);
+			return;
+		}
+		for (i = 0; i < count; i++) {
+			param = &er->events[i];
+			mvumi_show_event(mhba, param);
+		}
+	} else if (msg == APICDB1_HOST_GETEVENT) {
+		mvumi_proc_msg(mhba, buffer);
+	}
+}
+
+static int mvumi_get_event(struct mvumi_hba *mhba, unsigned char msg)
+{
+	struct mvumi_cmd *cmd;
+	struct mvumi_msg_frame *frame;
+
+	cmd = mvumi_create_internal_cmd(mhba, 512);
+	if (!cmd)
+		return -1;
+	cmd->scmd = NULL;
+	cmd->cmd_status = REQ_STATUS_PENDING;
+	atomic_set(&cmd->sync_cmd, 0);
+	frame = cmd->frame;
+	frame->device_id = 0;
+	frame->cmd_flag = CMD_FLAG_DATA_IN;
+	frame->req_function = CL_FUN_SCSI_CMD;
+	frame->cdb_length = MAX_COMMAND_SIZE;
+	frame->data_transfer_length = sizeof(struct mvumi_event_req);
+	memset(frame->cdb, 0, MAX_COMMAND_SIZE);
+	frame->cdb[0] = APICDB0_EVENT;
+	frame->cdb[1] = msg;
+	mvumi_issue_blocked_cmd(mhba, cmd);
+
+	if (cmd->cmd_status != SAM_STAT_GOOD)
+		dev_err(&mhba->pdev->dev, "get event failed, status=0x%x.\n",
+							cmd->cmd_status);
+	else
+		mvumi_notification(mhba, cmd->frame->cdb[1], cmd->data_buf);
+
+	mvumi_delete_internal_cmd(mhba, cmd);
+	return 0;
+}
+
+static void mvumi_scan_events(struct work_struct *work)
+{
+	struct mvumi_events_wq *mu_ev =
+		container_of(work, struct mvumi_events_wq, work_q);
+
+	mvumi_get_event(mu_ev->mhba, mu_ev->event);
+	kfree(mu_ev);
+}
+
+static void mvumi_launch_events(struct mvumi_hba *mhba, u32 isr_status)
+{
+	struct mvumi_events_wq *mu_ev;
+
+	while (isr_status & (DRBL_BUS_CHANGE | DRBL_EVENT_NOTIFY)) {
+		if (isr_status & DRBL_BUS_CHANGE) {
+			atomic_inc(&mhba->pnp_count);
+			wake_up_process(mhba->dm_thread);
+			isr_status &= ~(DRBL_BUS_CHANGE);
+			continue;
+		}
+
+		mu_ev = kzalloc(sizeof(*mu_ev), GFP_ATOMIC);
+		if (mu_ev) {
+			INIT_WORK(&mu_ev->work_q, mvumi_scan_events);
+			mu_ev->mhba = mhba;
+			mu_ev->event = APICDB1_EVENT_GETEVENT;
+			isr_status &= ~(DRBL_EVENT_NOTIFY);
+			mu_ev->param = NULL;
+			schedule_work(&mu_ev->work_q);
+		}
+	}
+}
+
+static void mvumi_handle_clob(struct mvumi_hba *mhba)
+{
+	struct mvumi_rsp_frame *ob_frame;
+	struct mvumi_cmd *cmd;
+	struct mvumi_ob_data *pool;
+
+	while (!list_empty(&mhba->free_ob_list)) {
+		pool = list_first_entry(&mhba->free_ob_list,
+						struct mvumi_ob_data, list);
+		list_del_init(&pool->list);
+		list_add_tail(&pool->list, &mhba->ob_data_list);
+
+		ob_frame = (struct mvumi_rsp_frame *) &pool->data[0];
+		cmd = mhba->tag_cmd[ob_frame->tag];
+
+		atomic_dec(&mhba->fw_outstanding);
+		mhba->tag_cmd[ob_frame->tag] = NULL;
+		tag_release_one(mhba, &mhba->tag_pool, ob_frame->tag);
+		if (cmd->scmd)
+			mvumi_complete_cmd(mhba, cmd, ob_frame);
+		else
+			mvumi_complete_internal_cmd(mhba, cmd, ob_frame);
+	}
+	mhba->instancet->fire_cmd(mhba, NULL);
+}
+
+static irqreturn_t mvumi_isr_handler(int irq, void *devp)
+{
+	struct mvumi_hba *mhba = (struct mvumi_hba *) devp;
+	unsigned long flags;
+
+	spin_lock_irqsave(mhba->shost->host_lock, flags);
+	if (unlikely(mhba->instancet->clear_intr(mhba) || !mhba->global_isr)) {
+		spin_unlock_irqrestore(mhba->shost->host_lock, flags);
+		return IRQ_NONE;
+	}
+
+	if (mhba->global_isr & mhba->regs->int_dl_cpu2pciea) {
+		if (mhba->isr_status & (DRBL_BUS_CHANGE | DRBL_EVENT_NOTIFY))
+			mvumi_launch_events(mhba, mhba->isr_status);
+		if (mhba->isr_status & DRBL_HANDSHAKE_ISR) {
+			dev_warn(&mhba->pdev->dev, "enter handshake again!\n");
+			mvumi_handshake(mhba);
+		}
+
+	}
+
+	if (mhba->global_isr & mhba->regs->int_comaout)
+		mvumi_receive_ob_list_entry(mhba);
+
+	mhba->global_isr = 0;
+	mhba->isr_status = 0;
+	if (mhba->fw_state == FW_STATE_STARTED)
+		mvumi_handle_clob(mhba);
+	spin_unlock_irqrestore(mhba->shost->host_lock, flags);
+	return IRQ_HANDLED;
+}
+
+static enum mvumi_qc_result mvumi_send_command(struct mvumi_hba *mhba,
+						struct mvumi_cmd *cmd)
+{
+	void *ib_entry;
+	struct mvumi_msg_frame *ib_frame;
+	unsigned int frame_len;
+
+	ib_frame = cmd->frame;
+	if (unlikely(mhba->fw_state != FW_STATE_STARTED)) {
+		dev_dbg(&mhba->pdev->dev, "firmware not ready.\n");
+		return MV_QUEUE_COMMAND_RESULT_NO_RESOURCE;
+	}
+	if (tag_is_empty(&mhba->tag_pool)) {
+		dev_dbg(&mhba->pdev->dev, "no free tag.\n");
+		return MV_QUEUE_COMMAND_RESULT_NO_RESOURCE;
+	}
+	mvumi_get_ib_list_entry(mhba, &ib_entry);
+
+	cmd->frame->tag = tag_get_one(mhba, &mhba->tag_pool);
+	cmd->frame->request_id = mhba->io_seq++;
+	cmd->request_id = cmd->frame->request_id;
+	mhba->tag_cmd[cmd->frame->tag] = cmd;
+	frame_len = sizeof(*ib_frame) - 4 +
+				ib_frame->sg_counts * sizeof(struct mvumi_sgl);
+	if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC) {
+		struct mvumi_dyn_list_entry *dle;
+		dle = ib_entry;
+		dle->src_low_addr =
+			cpu_to_le32(lower_32_bits(cmd->frame_phys));
+		dle->src_high_addr =
+			cpu_to_le32(upper_32_bits(cmd->frame_phys));
+		dle->if_length = (frame_len >> 2) & 0xFFF;
+	} else {
+		memcpy(ib_entry, ib_frame, frame_len);
+	}
+	return MV_QUEUE_COMMAND_RESULT_SENT;
+}
+
+static void mvumi_fire_cmd(struct mvumi_hba *mhba, struct mvumi_cmd *cmd)
+{
+	unsigned short num_of_cl_sent = 0;
+	unsigned int count;
+	enum mvumi_qc_result result;
+
+	if (cmd)
+		list_add_tail(&cmd->queue_pointer, &mhba->waiting_req_list);
+	count = mhba->instancet->check_ib_list(mhba);
+	if (list_empty(&mhba->waiting_req_list) || !count)
+		return;
+
+	do {
+		cmd = list_first_entry(&mhba->waiting_req_list,
+				       struct mvumi_cmd, queue_pointer);
+		list_del_init(&cmd->queue_pointer);
+		result = mvumi_send_command(mhba, cmd);
+		switch (result) {
+		case MV_QUEUE_COMMAND_RESULT_SENT:
+			num_of_cl_sent++;
+			break;
+		case MV_QUEUE_COMMAND_RESULT_NO_RESOURCE:
+			list_add(&cmd->queue_pointer, &mhba->waiting_req_list);
+			if (num_of_cl_sent > 0)
+				mvumi_send_ib_list_entry(mhba);
+
+			return;
+		}
+	} while (!list_empty(&mhba->waiting_req_list) && count--);
+
+	if (num_of_cl_sent > 0)
+		mvumi_send_ib_list_entry(mhba);
+}
+
+/**
+ * mvumi_enable_intr -	Enables interrupts
+ * @mhba:		Adapter soft state
+ */
+static void mvumi_enable_intr(struct mvumi_hba *mhba)
+{
+	unsigned int mask;
+	struct mvumi_hw_regs *regs = mhba->regs;
+
+	iowrite32(regs->int_drbl_int_mask, regs->arm_to_pciea_mask_reg);
+	mask = ioread32(regs->enpointa_mask_reg);
+	mask |= regs->int_dl_cpu2pciea | regs->int_comaout | regs->int_comaerr;
+	iowrite32(mask, regs->enpointa_mask_reg);
+}
+
+/**
+ * mvumi_disable_intr -Disables interrupt
+ * @mhba:		Adapter soft state
+ */
+static void mvumi_disable_intr(struct mvumi_hba *mhba)
+{
+	unsigned int mask;
+	struct mvumi_hw_regs *regs = mhba->regs;
+
+	iowrite32(0, regs->arm_to_pciea_mask_reg);
+	mask = ioread32(regs->enpointa_mask_reg);
+	mask &= ~(regs->int_dl_cpu2pciea | regs->int_comaout |
+							regs->int_comaerr);
+	iowrite32(mask, regs->enpointa_mask_reg);
+}
+
+static int mvumi_clear_intr(void *extend)
+{
+	struct mvumi_hba *mhba = (struct mvumi_hba *) extend;
+	unsigned int status, isr_status = 0, tmp = 0;
+	struct mvumi_hw_regs *regs = mhba->regs;
+
+	status = ioread32(regs->main_int_cause_reg);
+	if (!(status & regs->int_mu) || status == 0xFFFFFFFF)
+		return 1;
+	if (unlikely(status & regs->int_comaerr)) {
+		tmp = ioread32(regs->outb_isr_cause);
+		if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9580) {
+			if (tmp & regs->clic_out_err) {
+				iowrite32(tmp & regs->clic_out_err,
+							regs->outb_isr_cause);
+			}
+		} else {
+			if (tmp & (regs->clic_in_err | regs->clic_out_err))
+				iowrite32(tmp & (regs->clic_in_err |
+						regs->clic_out_err),
+						regs->outb_isr_cause);
+		}
+		status ^= mhba->regs->int_comaerr;
+		/* inbound or outbound parity error, command will timeout */
+	}
+	if (status & regs->int_comaout) {
+		tmp = ioread32(regs->outb_isr_cause);
+		if (tmp & regs->clic_irq)
+			iowrite32(tmp & regs->clic_irq, regs->outb_isr_cause);
+	}
+	if (status & regs->int_dl_cpu2pciea) {
+		isr_status = ioread32(regs->arm_to_pciea_drbl_reg);
+		if (isr_status)
+			iowrite32(isr_status, regs->arm_to_pciea_drbl_reg);
+	}
+
+	mhba->global_isr = status;
+	mhba->isr_status = isr_status;
+
+	return 0;
+}
+
+/**
+ * mvumi_read_fw_status_reg - returns the current FW status value
+ * @mhba:		Adapter soft state
+ */
+static unsigned int mvumi_read_fw_status_reg(struct mvumi_hba *mhba)
+{
+	unsigned int status;
+
+	status = ioread32(mhba->regs->arm_to_pciea_drbl_reg);
+	if (status)
+		iowrite32(status, mhba->regs->arm_to_pciea_drbl_reg);
+	return status;
+}
+
+static struct mvumi_instance_template mvumi_instance_9143 = {
+	.fire_cmd = mvumi_fire_cmd,
+	.enable_intr = mvumi_enable_intr,
+	.disable_intr = mvumi_disable_intr,
+	.clear_intr = mvumi_clear_intr,
+	.read_fw_status_reg = mvumi_read_fw_status_reg,
+	.check_ib_list = mvumi_check_ib_list_9143,
+	.check_ob_list = mvumi_check_ob_list_9143,
+	.reset_host = mvumi_reset_host_9143,
+};
+
+static struct mvumi_instance_template mvumi_instance_9580 = {
+	.fire_cmd = mvumi_fire_cmd,
+	.enable_intr = mvumi_enable_intr,
+	.disable_intr = mvumi_disable_intr,
+	.clear_intr = mvumi_clear_intr,
+	.read_fw_status_reg = mvumi_read_fw_status_reg,
+	.check_ib_list = mvumi_check_ib_list_9580,
+	.check_ob_list = mvumi_check_ob_list_9580,
+	.reset_host = mvumi_reset_host_9580,
+};
+
+static int mvumi_slave_configure(struct scsi_device *sdev)
+{
+	struct mvumi_hba *mhba;
+	unsigned char bitcount = sizeof(unsigned char) * 8;
+
+	mhba = (struct mvumi_hba *) sdev->host->hostdata;
+	if (sdev->id >= mhba->max_target_id)
+		return -EINVAL;
+
+	mhba->target_map[sdev->id / bitcount] |= (1 << (sdev->id % bitcount));
+	return 0;
+}
+
+/**
+ * mvumi_build_frame -	Prepares a direct cdb (DCDB) command
+ * @mhba:		Adapter soft state
+ * @scmd:		SCSI command
+ * @cmd:		Command to be prepared in
+ *
+ * This function prepares CDB commands. These are typcially pass-through
+ * commands to the devices.
+ */
+static unsigned char mvumi_build_frame(struct mvumi_hba *mhba,
+				struct scsi_cmnd *scmd, struct mvumi_cmd *cmd)
+{
+	struct mvumi_msg_frame *pframe;
+
+	cmd->scmd = scmd;
+	cmd->cmd_status = REQ_STATUS_PENDING;
+	pframe = cmd->frame;
+	pframe->device_id = ((unsigned short) scmd->device->id) |
+				(((unsigned short) scmd->device->lun) << 8);
+	pframe->cmd_flag = 0;
+
+	switch (scmd->sc_data_direction) {
+	case DMA_NONE:
+		pframe->cmd_flag |= CMD_FLAG_NON_DATA;
+		break;
+	case DMA_FROM_DEVICE:
+		pframe->cmd_flag |= CMD_FLAG_DATA_IN;
+		break;
+	case DMA_TO_DEVICE:
+		pframe->cmd_flag |= CMD_FLAG_DATA_OUT;
+		break;
+	case DMA_BIDIRECTIONAL:
+	default:
+		dev_warn(&mhba->pdev->dev, "unexpected data direction[%d] "
+			"cmd[0x%x]\n", scmd->sc_data_direction, scmd->cmnd[0]);
+		goto error;
+	}
+
+	pframe->cdb_length = scmd->cmd_len;
+	memcpy(pframe->cdb, scmd->cmnd, pframe->cdb_length);
+	pframe->req_function = CL_FUN_SCSI_CMD;
+	if (scsi_bufflen(scmd)) {
+		if (mvumi_make_sgl(mhba, scmd, &pframe->payload[0],
+			&pframe->sg_counts))
+			goto error;
+
+		pframe->data_transfer_length = scsi_bufflen(scmd);
+	} else {
+		pframe->sg_counts = 0;
+		pframe->data_transfer_length = 0;
+	}
+	return 0;
+
+error:
+	scsi_build_sense(scmd, 0, ILLEGAL_REQUEST, 0x24, 0);
+	return -1;
+}
+
+/**
+ * mvumi_queue_command -	Queue entry point
+ * @shost:			Scsi host to queue command on
+ * @scmd:			SCSI command to be queued
+ */
+static int mvumi_queue_command(struct Scsi_Host *shost,
+					struct scsi_cmnd *scmd)
+{
+	struct mvumi_cmd *cmd;
+	struct mvumi_hba *mhba;
+	unsigned long irq_flags;
+
+	spin_lock_irqsave(shost->host_lock, irq_flags);
+
+	mhba = (struct mvumi_hba *) shost->hostdata;
+	scmd->result = 0;
+	cmd = mvumi_get_cmd(mhba);
+	if (unlikely(!cmd)) {
+		spin_unlock_irqrestore(shost->host_lock, irq_flags);
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+
+	if (unlikely(mvumi_build_frame(mhba, scmd, cmd)))
+		goto out_return_cmd;
+
+	cmd->scmd = scmd;
+	mvumi_priv(scmd)->cmd_priv = cmd;
+	mhba->instancet->fire_cmd(mhba, cmd);
+	spin_unlock_irqrestore(shost->host_lock, irq_flags);
+	return 0;
+
+out_return_cmd:
+	mvumi_return_cmd(mhba, cmd);
+	scsi_done(scmd);
+	spin_unlock_irqrestore(shost->host_lock, irq_flags);
+	return 0;
+}
+
+static enum blk_eh_timer_return mvumi_timed_out(struct scsi_cmnd *scmd)
+{
+	struct mvumi_cmd *cmd = mvumi_priv(scmd)->cmd_priv;
+	struct Scsi_Host *host = scmd->device->host;
+	struct mvumi_hba *mhba = shost_priv(host);
+	unsigned long flags;
+
+	spin_lock_irqsave(mhba->shost->host_lock, flags);
+
+	if (mhba->tag_cmd[cmd->frame->tag]) {
+		mhba->tag_cmd[cmd->frame->tag] = NULL;
+		tag_release_one(mhba, &mhba->tag_pool, cmd->frame->tag);
+	}
+	if (!list_empty(&cmd->queue_pointer))
+		list_del_init(&cmd->queue_pointer);
+	else
+		atomic_dec(&mhba->fw_outstanding);
+
+	scmd->result = (DID_ABORT << 16);
+	mvumi_priv(scmd)->cmd_priv = NULL;
+	if (scsi_bufflen(scmd)) {
+		dma_unmap_sg(&mhba->pdev->dev, scsi_sglist(scmd),
+			     scsi_sg_count(scmd),
+			     scmd->sc_data_direction);
+	}
+	mvumi_return_cmd(mhba, cmd);
+	spin_unlock_irqrestore(mhba->shost->host_lock, flags);
+
+	return BLK_EH_DONE;
+}
+
+static int
+mvumi_bios_param(struct scsi_device *sdev, struct block_device *bdev,
+			sector_t capacity, int geom[])
+{
+	int heads, sectors;
+	sector_t cylinders;
+	unsigned long tmp;
+
+	heads = 64;
+	sectors = 32;
+	tmp = heads * sectors;
+	cylinders = capacity;
+	sector_div(cylinders, tmp);
+
+	if (capacity >= 0x200000) {
+		heads = 255;
+		sectors = 63;
+		tmp = heads * sectors;
+		cylinders = capacity;
+		sector_div(cylinders, tmp);
+	}
+	geom[0] = heads;
+	geom[1] = sectors;
+	geom[2] = cylinders;
+
+	return 0;
+}
+
+static struct scsi_host_template mvumi_template = {
+
+	.module = THIS_MODULE,
+	.name = "Marvell Storage Controller",
+	.slave_configure = mvumi_slave_configure,
+	.queuecommand = mvumi_queue_command,
+	.eh_timed_out = mvumi_timed_out,
+	.eh_host_reset_handler = mvumi_host_reset,
+	.bios_param = mvumi_bios_param,
+	.dma_boundary = PAGE_SIZE - 1,
+	.this_id = -1,
+	.cmd_size = sizeof(struct mvumi_cmd_priv),
+};
+
+static int mvumi_cfg_hw_reg(struct mvumi_hba *mhba)
+{
+	void *base = NULL;
+	struct mvumi_hw_regs *regs;
+
+	switch (mhba->pdev->device) {
+	case PCI_DEVICE_ID_MARVELL_MV9143:
+		mhba->mmio = mhba->base_addr[0];
+		base = mhba->mmio;
+		if (!mhba->regs) {
+			mhba->regs = kzalloc(sizeof(*regs), GFP_KERNEL);
+			if (mhba->regs == NULL)
+				return -ENOMEM;
+		}
+		regs = mhba->regs;
+
+		/* For Arm */
+		regs->ctrl_sts_reg          = base + 0x20104;
+		regs->rstoutn_mask_reg      = base + 0x20108;
+		regs->sys_soft_rst_reg      = base + 0x2010C;
+		regs->main_int_cause_reg    = base + 0x20200;
+		regs->enpointa_mask_reg     = base + 0x2020C;
+		regs->rstoutn_en_reg        = base + 0xF1400;
+		/* For Doorbell */
+		regs->pciea_to_arm_drbl_reg = base + 0x20400;
+		regs->arm_to_pciea_drbl_reg = base + 0x20408;
+		regs->arm_to_pciea_mask_reg = base + 0x2040C;
+		regs->pciea_to_arm_msg0     = base + 0x20430;
+		regs->pciea_to_arm_msg1     = base + 0x20434;
+		regs->arm_to_pciea_msg0     = base + 0x20438;
+		regs->arm_to_pciea_msg1     = base + 0x2043C;
+
+		/* For Message Unit */
+
+		regs->inb_aval_count_basel  = base + 0x508;
+		regs->inb_aval_count_baseh  = base + 0x50C;
+		regs->inb_write_pointer     = base + 0x518;
+		regs->inb_read_pointer      = base + 0x51C;
+		regs->outb_coal_cfg         = base + 0x568;
+		regs->outb_copy_basel       = base + 0x5B0;
+		regs->outb_copy_baseh       = base + 0x5B4;
+		regs->outb_copy_pointer     = base + 0x544;
+		regs->outb_read_pointer     = base + 0x548;
+		regs->outb_isr_cause        = base + 0x560;
+		regs->outb_coal_cfg         = base + 0x568;
+		/* Bit setting for HW */
+		regs->int_comaout           = 1 << 8;
+		regs->int_comaerr           = 1 << 6;
+		regs->int_dl_cpu2pciea      = 1 << 1;
+		regs->cl_pointer_toggle     = 1 << 12;
+		regs->clic_irq              = 1 << 1;
+		regs->clic_in_err           = 1 << 8;
+		regs->clic_out_err          = 1 << 12;
+		regs->cl_slot_num_mask      = 0xFFF;
+		regs->int_drbl_int_mask     = 0x3FFFFFFF;
+		regs->int_mu = regs->int_dl_cpu2pciea | regs->int_comaout |
+							regs->int_comaerr;
+		break;
+	case PCI_DEVICE_ID_MARVELL_MV9580:
+		mhba->mmio = mhba->base_addr[2];
+		base = mhba->mmio;
+		if (!mhba->regs) {
+			mhba->regs = kzalloc(sizeof(*regs), GFP_KERNEL);
+			if (mhba->regs == NULL)
+				return -ENOMEM;
+		}
+		regs = mhba->regs;
+		/* For Arm */
+		regs->ctrl_sts_reg          = base + 0x20104;
+		regs->rstoutn_mask_reg      = base + 0x1010C;
+		regs->sys_soft_rst_reg      = base + 0x10108;
+		regs->main_int_cause_reg    = base + 0x10200;
+		regs->enpointa_mask_reg     = base + 0x1020C;
+		regs->rstoutn_en_reg        = base + 0xF1400;
+
+		/* For Doorbell */
+		regs->pciea_to_arm_drbl_reg = base + 0x10460;
+		regs->arm_to_pciea_drbl_reg = base + 0x10480;
+		regs->arm_to_pciea_mask_reg = base + 0x10484;
+		regs->pciea_to_arm_msg0     = base + 0x10400;
+		regs->pciea_to_arm_msg1     = base + 0x10404;
+		regs->arm_to_pciea_msg0     = base + 0x10420;
+		regs->arm_to_pciea_msg1     = base + 0x10424;
+
+		/* For reset*/
+		regs->reset_request         = base + 0x10108;
+		regs->reset_enable          = base + 0x1010c;
+
+		/* For Message Unit */
+		regs->inb_aval_count_basel  = base + 0x4008;
+		regs->inb_aval_count_baseh  = base + 0x400C;
+		regs->inb_write_pointer     = base + 0x4018;
+		regs->inb_read_pointer      = base + 0x401C;
+		regs->outb_copy_basel       = base + 0x4058;
+		regs->outb_copy_baseh       = base + 0x405C;
+		regs->outb_copy_pointer     = base + 0x406C;
+		regs->outb_read_pointer     = base + 0x4070;
+		regs->outb_coal_cfg         = base + 0x4080;
+		regs->outb_isr_cause        = base + 0x4088;
+		/* Bit setting for HW */
+		regs->int_comaout           = 1 << 4;
+		regs->int_dl_cpu2pciea      = 1 << 12;
+		regs->int_comaerr           = 1 << 29;
+		regs->cl_pointer_toggle     = 1 << 14;
+		regs->cl_slot_num_mask      = 0x3FFF;
+		regs->clic_irq              = 1 << 0;
+		regs->clic_out_err          = 1 << 1;
+		regs->int_drbl_int_mask     = 0x3FFFFFFF;
+		regs->int_mu = regs->int_dl_cpu2pciea | regs->int_comaout;
+		break;
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+/**
+ * mvumi_init_fw -	Initializes the FW
+ * @mhba:		Adapter soft state
+ *
+ * This is the main function for initializing firmware.
+ */
+static int mvumi_init_fw(struct mvumi_hba *mhba)
+{
+	int ret = 0;
+
+	if (pci_request_regions(mhba->pdev, MV_DRIVER_NAME)) {
+		dev_err(&mhba->pdev->dev, "IO memory region busy!\n");
+		return -EBUSY;
+	}
+	ret = mvumi_map_pci_addr(mhba->pdev, mhba->base_addr);
+	if (ret)
+		goto fail_ioremap;
+
+	switch (mhba->pdev->device) {
+	case PCI_DEVICE_ID_MARVELL_MV9143:
+		mhba->instancet = &mvumi_instance_9143;
+		mhba->io_seq = 0;
+		mhba->max_sge = MVUMI_MAX_SG_ENTRY;
+		mhba->request_id_enabled = 1;
+		break;
+	case PCI_DEVICE_ID_MARVELL_MV9580:
+		mhba->instancet = &mvumi_instance_9580;
+		mhba->io_seq = 0;
+		mhba->max_sge = MVUMI_MAX_SG_ENTRY;
+		break;
+	default:
+		dev_err(&mhba->pdev->dev, "device 0x%x not supported!\n",
+							mhba->pdev->device);
+		mhba->instancet = NULL;
+		ret = -EINVAL;
+		goto fail_alloc_mem;
+	}
+	dev_dbg(&mhba->pdev->dev, "device id : %04X is found.\n",
+							mhba->pdev->device);
+	ret = mvumi_cfg_hw_reg(mhba);
+	if (ret) {
+		dev_err(&mhba->pdev->dev,
+			"failed to allocate memory for reg\n");
+		ret = -ENOMEM;
+		goto fail_alloc_mem;
+	}
+	mhba->handshake_page = dma_alloc_coherent(&mhba->pdev->dev,
+			HSP_MAX_SIZE, &mhba->handshake_page_phys, GFP_KERNEL);
+	if (!mhba->handshake_page) {
+		dev_err(&mhba->pdev->dev,
+			"failed to allocate memory for handshake\n");
+		ret = -ENOMEM;
+		goto fail_alloc_page;
+	}
+
+	if (mvumi_start(mhba)) {
+		ret = -EINVAL;
+		goto fail_ready_state;
+	}
+	ret = mvumi_alloc_cmds(mhba);
+	if (ret)
+		goto fail_ready_state;
+
+	return 0;
+
+fail_ready_state:
+	mvumi_release_mem_resource(mhba);
+	dma_free_coherent(&mhba->pdev->dev, HSP_MAX_SIZE,
+		mhba->handshake_page, mhba->handshake_page_phys);
+fail_alloc_page:
+	kfree(mhba->regs);
+fail_alloc_mem:
+	mvumi_unmap_pci_addr(mhba->pdev, mhba->base_addr);
+fail_ioremap:
+	pci_release_regions(mhba->pdev);
+
+	return ret;
+}
+
+/**
+ * mvumi_io_attach -	Attaches this driver to SCSI mid-layer
+ * @mhba:		Adapter soft state
+ */
+static int mvumi_io_attach(struct mvumi_hba *mhba)
+{
+	struct Scsi_Host *host = mhba->shost;
+	struct scsi_device *sdev = NULL;
+	int ret;
+	unsigned int max_sg = (mhba->ib_max_size + 4 -
+		sizeof(struct mvumi_msg_frame)) / sizeof(struct mvumi_sgl);
+
+	host->irq = mhba->pdev->irq;
+	host->unique_id = mhba->unique_id;
+	host->can_queue = (mhba->max_io - 1) ? (mhba->max_io - 1) : 1;
+	host->sg_tablesize = mhba->max_sge > max_sg ? max_sg : mhba->max_sge;
+	host->max_sectors = mhba->max_transfer_size / 512;
+	host->cmd_per_lun = (mhba->max_io - 1) ? (mhba->max_io - 1) : 1;
+	host->max_id = mhba->max_target_id;
+	host->max_cmd_len = MAX_COMMAND_SIZE;
+
+	ret = scsi_add_host(host, &mhba->pdev->dev);
+	if (ret) {
+		dev_err(&mhba->pdev->dev, "scsi_add_host failed\n");
+		return ret;
+	}
+	mhba->fw_flag |= MVUMI_FW_ATTACH;
+
+	mutex_lock(&mhba->sas_discovery_mutex);
+	if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9580)
+		ret = scsi_add_device(host, 0, mhba->max_target_id - 1, 0);
+	else
+		ret = 0;
+	if (ret) {
+		dev_err(&mhba->pdev->dev, "add virtual device failed\n");
+		mutex_unlock(&mhba->sas_discovery_mutex);
+		goto fail_add_device;
+	}
+
+	mhba->dm_thread = kthread_create(mvumi_rescan_bus,
+						mhba, "mvumi_scanthread");
+	if (IS_ERR(mhba->dm_thread)) {
+		dev_err(&mhba->pdev->dev,
+			"failed to create device scan thread\n");
+		ret = PTR_ERR(mhba->dm_thread);
+		mutex_unlock(&mhba->sas_discovery_mutex);
+		goto fail_create_thread;
+	}
+	atomic_set(&mhba->pnp_count, 1);
+	wake_up_process(mhba->dm_thread);
+
+	mutex_unlock(&mhba->sas_discovery_mutex);
+	return 0;
+
+fail_create_thread:
+	if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9580)
+		sdev = scsi_device_lookup(mhba->shost, 0,
+						mhba->max_target_id - 1, 0);
+	if (sdev) {
+		scsi_remove_device(sdev);
+		scsi_device_put(sdev);
+	}
+fail_add_device:
+	scsi_remove_host(mhba->shost);
+	return ret;
+}
+
+/**
+ * mvumi_probe_one -	PCI hotplug entry point
+ * @pdev:		PCI device structure
+ * @id:			PCI ids of supported hotplugged adapter
+ */
+static int mvumi_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct Scsi_Host *host;
+	struct mvumi_hba *mhba;
+	int ret;
+
+	dev_dbg(&pdev->dev, " %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
+			pdev->vendor, pdev->device, pdev->subsystem_vendor,
+			pdev->subsystem_device);
+
+	ret = pci_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	ret = mvumi_pci_set_master(pdev);
+	if (ret)
+		goto fail_set_dma_mask;
+
+	host = scsi_host_alloc(&mvumi_template, sizeof(*mhba));
+	if (!host) {
+		dev_err(&pdev->dev, "scsi_host_alloc failed\n");
+		ret = -ENOMEM;
+		goto fail_alloc_instance;
+	}
+	mhba = shost_priv(host);
+
+	INIT_LIST_HEAD(&mhba->cmd_pool);
+	INIT_LIST_HEAD(&mhba->ob_data_list);
+	INIT_LIST_HEAD(&mhba->free_ob_list);
+	INIT_LIST_HEAD(&mhba->res_list);
+	INIT_LIST_HEAD(&mhba->waiting_req_list);
+	mutex_init(&mhba->device_lock);
+	INIT_LIST_HEAD(&mhba->mhba_dev_list);
+	INIT_LIST_HEAD(&mhba->shost_dev_list);
+	atomic_set(&mhba->fw_outstanding, 0);
+	init_waitqueue_head(&mhba->int_cmd_wait_q);
+	mutex_init(&mhba->sas_discovery_mutex);
+
+	mhba->pdev = pdev;
+	mhba->shost = host;
+	mhba->unique_id = pdev->bus->number << 8 | pdev->devfn;
+
+	ret = mvumi_init_fw(mhba);
+	if (ret)
+		goto fail_init_fw;
+
+	ret = request_irq(mhba->pdev->irq, mvumi_isr_handler, IRQF_SHARED,
+				"mvumi", mhba);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register IRQ\n");
+		goto fail_init_irq;
+	}
+
+	mhba->instancet->enable_intr(mhba);
+	pci_set_drvdata(pdev, mhba);
+
+	ret = mvumi_io_attach(mhba);
+	if (ret)
+		goto fail_io_attach;
+
+	mvumi_backup_bar_addr(mhba);
+	dev_dbg(&pdev->dev, "probe mvumi driver successfully.\n");
+
+	return 0;
+
+fail_io_attach:
+	mhba->instancet->disable_intr(mhba);
+	free_irq(mhba->pdev->irq, mhba);
+fail_init_irq:
+	mvumi_release_fw(mhba);
+fail_init_fw:
+	scsi_host_put(host);
+
+fail_alloc_instance:
+fail_set_dma_mask:
+	pci_disable_device(pdev);
+
+	return ret;
+}
+
+static void mvumi_detach_one(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host;
+	struct mvumi_hba *mhba;
+
+	mhba = pci_get_drvdata(pdev);
+	if (mhba->dm_thread) {
+		kthread_stop(mhba->dm_thread);
+		mhba->dm_thread = NULL;
+	}
+
+	mvumi_detach_devices(mhba);
+	host = mhba->shost;
+	scsi_remove_host(mhba->shost);
+	mvumi_flush_cache(mhba);
+
+	mhba->instancet->disable_intr(mhba);
+	free_irq(mhba->pdev->irq, mhba);
+	mvumi_release_fw(mhba);
+	scsi_host_put(host);
+	pci_disable_device(pdev);
+	dev_dbg(&pdev->dev, "driver is removed!\n");
+}
+
+/**
+ * mvumi_shutdown -	Shutdown entry point
+ * @pdev:		PCI device structure
+ */
+static void mvumi_shutdown(struct pci_dev *pdev)
+{
+	struct mvumi_hba *mhba = pci_get_drvdata(pdev);
+
+	mvumi_flush_cache(mhba);
+}
+
+static int __maybe_unused mvumi_suspend(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct mvumi_hba *mhba = pci_get_drvdata(pdev);
+
+	mvumi_flush_cache(mhba);
+
+	mhba->instancet->disable_intr(mhba);
+	mvumi_unmap_pci_addr(pdev, mhba->base_addr);
+
+	return 0;
+}
+
+static int __maybe_unused mvumi_resume(struct device *dev)
+{
+	int ret;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct mvumi_hba *mhba = pci_get_drvdata(pdev);
+
+	ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		goto fail;
+	ret = mvumi_map_pci_addr(mhba->pdev, mhba->base_addr);
+	if (ret)
+		goto release_regions;
+
+	if (mvumi_cfg_hw_reg(mhba)) {
+		ret = -EINVAL;
+		goto unmap_pci_addr;
+	}
+
+	mhba->mmio = mhba->base_addr[0];
+	mvumi_reset(mhba);
+
+	if (mvumi_start(mhba)) {
+		ret = -EINVAL;
+		goto unmap_pci_addr;
+	}
+
+	mhba->instancet->enable_intr(mhba);
+
+	return 0;
+
+unmap_pci_addr:
+	mvumi_unmap_pci_addr(pdev, mhba->base_addr);
+release_regions:
+	pci_release_regions(pdev);
+fail:
+
+	return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(mvumi_pm_ops, mvumi_suspend, mvumi_resume);
+
+static struct pci_driver mvumi_pci_driver = {
+
+	.name = MV_DRIVER_NAME,
+	.id_table = mvumi_pci_table,
+	.probe = mvumi_probe_one,
+	.remove = mvumi_detach_one,
+	.shutdown = mvumi_shutdown,
+	.driver.pm = &mvumi_pm_ops,
+};
+
+module_pci_driver(mvumi_pci_driver);