/*
 * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
 *
 * Copyright (c) 2008-2009 USI Co., Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 */

#include <linux/slab.h>
#include "pm8001_sas.h"
#include "pm8001_chips.h"
#include "pm80xx_hwi.h"

static ulong logging_level = PM8001_FAIL_LOGGING | PM8001_IOERR_LOGGING;
module_param(logging_level, ulong, 0644);
MODULE_PARM_DESC(logging_level, " bits for enabling logging info.");

static ulong link_rate = LINKRATE_15 | LINKRATE_30 | LINKRATE_60 | LINKRATE_120;
module_param(link_rate, ulong, 0644);
MODULE_PARM_DESC(link_rate, "Enable link rate.\n"
                " 1: Link rate 1.5G\n"
                " 2: Link rate 3.0G\n"
                " 4: Link rate 6.0G\n"
                " 8: Link rate 12.0G\n");

static struct scsi_transport_template *pm8001_stt;

/**
 * chip info structure to identify chip key functionality as
 * encryption available/not, no of ports, hw specific function ref
 */
static const struct pm8001_chip_info pm8001_chips[] = {
        [chip_8001] = {0,  8, &pm8001_8001_dispatch,},
        [chip_8008] = {0,  8, &pm8001_80xx_dispatch,},
        [chip_8009] = {1,  8, &pm8001_80xx_dispatch,},
        [chip_8018] = {0,  16, &pm8001_80xx_dispatch,},
        [chip_8019] = {1,  16, &pm8001_80xx_dispatch,},
        [chip_8074] = {0,  8, &pm8001_80xx_dispatch,},
        [chip_8076] = {0,  16, &pm8001_80xx_dispatch,},
        [chip_8077] = {0,  16, &pm8001_80xx_dispatch,},
        [chip_8006] = {0,  16, &pm8001_80xx_dispatch,},
        [chip_8070] = {0,  8, &pm8001_80xx_dispatch,},
        [chip_8072] = {0,  16, &pm8001_80xx_dispatch,},
};
static int pm8001_id;

LIST_HEAD(hba_list);

struct workqueue_struct *pm8001_wq;

/**
 * The main structure which LLDD must register for scsi core.
 */
static struct scsi_host_template pm8001_sht = {
        .module                 = THIS_MODULE,
        .name                   = DRV_NAME,
        .queuecommand           = sas_queuecommand,
        .target_alloc           = sas_target_alloc,
        .slave_configure        = sas_slave_configure,
        .scan_finished          = pm8001_scan_finished,
        .scan_start             = pm8001_scan_start,
        .change_queue_depth     = sas_change_queue_depth,
        .bios_param             = sas_bios_param,
        .can_queue              = 1,
        .this_id                = -1,
        .sg_tablesize           = SG_ALL,
        .max_sectors            = SCSI_DEFAULT_MAX_SECTORS,
        .eh_device_reset_handler = sas_eh_device_reset_handler,
        .eh_target_reset_handler = sas_eh_target_reset_handler,
        .target_destroy         = sas_target_destroy,
        .ioctl                  = sas_ioctl,
#ifdef CONFIG_COMPAT
        .compat_ioctl           = sas_ioctl,
#endif
        .shost_attrs            = pm8001_host_attrs,
        .track_queue_depth      = 1,
};

/**
 * Sas layer call this function to execute specific task.
 */
static struct sas_domain_function_template pm8001_transport_ops = {
        .lldd_dev_found         = pm8001_dev_found,
        .lldd_dev_gone          = pm8001_dev_gone,

        .lldd_execute_task      = pm8001_queue_command,
        .lldd_control_phy       = pm8001_phy_control,

        .lldd_abort_task        = pm8001_abort_task,
        .lldd_abort_task_set    = pm8001_abort_task_set,
        .lldd_clear_aca         = pm8001_clear_aca,
        .lldd_clear_task_set    = pm8001_clear_task_set,
        .lldd_I_T_nexus_reset   = pm8001_I_T_nexus_reset,
        .lldd_lu_reset          = pm8001_lu_reset,
        .lldd_query_task        = pm8001_query_task,
};

/**
 *pm8001_phy_init - initiate our adapter phys
 *@pm8001_ha: our hba structure.
 *@phy_id: phy id.
 */
static void pm8001_phy_init(struct pm8001_hba_info *pm8001_ha, int phy_id)
{
        struct pm8001_phy *phy = &pm8001_ha->phy[phy_id];
        struct asd_sas_phy *sas_phy = &phy->sas_phy;
        phy->phy_state = PHY_LINK_DISABLE;
        phy->pm8001_ha = pm8001_ha;
        sas_phy->enabled = (phy_id < pm8001_ha->chip->n_phy) ? 1 : 0;
        sas_phy->class = SAS;
        sas_phy->iproto = SAS_PROTOCOL_ALL;
        sas_phy->tproto = 0;
        sas_phy->type = PHY_TYPE_PHYSICAL;
        sas_phy->role = PHY_ROLE_INITIATOR;
        sas_phy->oob_mode = OOB_NOT_CONNECTED;
        sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
        sas_phy->id = phy_id;
        sas_phy->sas_addr = (u8 *)&phy->dev_sas_addr;
        sas_phy->frame_rcvd = &phy->frame_rcvd[0];
        sas_phy->ha = (struct sas_ha_struct *)pm8001_ha->shost->hostdata;
        sas_phy->lldd_phy = phy;
}

/**
 *pm8001_free - free hba
 *@pm8001_ha:   our hba structure.
 *
 */
static void pm8001_free(struct pm8001_hba_info *pm8001_ha)
{
        int i;

        if (!pm8001_ha)
                return;

        for (i = 0; i < USI_MAX_MEMCNT; i++) {
                if (pm8001_ha->memoryMap.region[i].virt_ptr != NULL) {
                        dma_free_coherent(&pm8001_ha->pdev->dev,
                                (pm8001_ha->memoryMap.region[i].total_len +
                                pm8001_ha->memoryMap.region[i].alignment),
                                pm8001_ha->memoryMap.region[i].virt_ptr,
                                pm8001_ha->memoryMap.region[i].phys_addr);
                        }
        }
        PM8001_CHIP_DISP->chip_iounmap(pm8001_ha);
        flush_workqueue(pm8001_wq);
        kfree(pm8001_ha->tags);
        kfree(pm8001_ha);
}

#ifdef PM8001_USE_TASKLET

/**
 * tasklet for 64 msi-x interrupt handler
 * @opaque: the passed general host adapter struct
 * Note: pm8001_tasklet is common for pm8001 & pm80xx
 */
static void pm8001_tasklet(unsigned long opaque)
{
        struct pm8001_hba_info *pm8001_ha;
        struct isr_param *irq_vector;

        irq_vector = (struct isr_param *)opaque;
        pm8001_ha = irq_vector->drv_inst;
        if (unlikely(!pm8001_ha))
                BUG_ON(1);
        PM8001_CHIP_DISP->isr(pm8001_ha, irq_vector->irq_id);
}
#endif

/**
 * pm8001_interrupt_handler_msix - main MSIX interrupt handler.
 * It obtains the vector number and calls the equivalent bottom
 * half or services directly.
 * @opaque: the passed outbound queue/vector. Host structure is
 * retrieved from the same.
 */
static irqreturn_t pm8001_interrupt_handler_msix(int irq, void *opaque)
{
        struct isr_param *irq_vector;
        struct pm8001_hba_info *pm8001_ha;
        irqreturn_t ret = IRQ_HANDLED;
        irq_vector = (struct isr_param *)opaque;
        pm8001_ha = irq_vector->drv_inst;

        if (unlikely(!pm8001_ha))
                return IRQ_NONE;
        if (!PM8001_CHIP_DISP->is_our_interrupt(pm8001_ha))
                return IRQ_NONE;
#ifdef PM8001_USE_TASKLET
        tasklet_schedule(&pm8001_ha->tasklet[irq_vector->irq_id]);
#else
        ret = PM8001_CHIP_DISP->isr(pm8001_ha, irq_vector->irq_id);
#endif
        return ret;
}

/**
 * pm8001_interrupt_handler_intx - main INTx interrupt handler.
 * @dev_id: sas_ha structure. The HBA is retrieved from sas_has structure.
 */

static irqreturn_t pm8001_interrupt_handler_intx(int irq, void *dev_id)
{
        struct pm8001_hba_info *pm8001_ha;
        irqreturn_t ret = IRQ_HANDLED;
        struct sas_ha_struct *sha = dev_id;
        pm8001_ha = sha->lldd_ha;
        if (unlikely(!pm8001_ha))
                return IRQ_NONE;
        if (!PM8001_CHIP_DISP->is_our_interrupt(pm8001_ha))
                return IRQ_NONE;

#ifdef PM8001_USE_TASKLET
        tasklet_schedule(&pm8001_ha->tasklet[0]);
#else
        ret = PM8001_CHIP_DISP->isr(pm8001_ha, 0);
#endif
        return ret;
}

/**
 * pm8001_alloc - initiate our hba structure and 6 DMAs area.
 * @pm8001_ha:our hba structure.
 *
 */
static int pm8001_alloc(struct pm8001_hba_info *pm8001_ha,
                        const struct pci_device_id *ent)
{
        int i;
        spin_lock_init(&pm8001_ha->lock);
        spin_lock_init(&pm8001_ha->bitmap_lock);
        PM8001_INIT_DBG(pm8001_ha,
                pm8001_printk("pm8001_alloc: PHY:%x\n",
                                pm8001_ha->chip->n_phy));
        for (i = 0; i < pm8001_ha->chip->n_phy; i++) {
                pm8001_phy_init(pm8001_ha, i);
                pm8001_ha->port[i].wide_port_phymap = 0;
                pm8001_ha->port[i].port_attached = 0;
                pm8001_ha->port[i].port_state = 0;
                INIT_LIST_HEAD(&pm8001_ha->port[i].list);
        }

        pm8001_ha->tags = kzalloc(PM8001_MAX_CCB, GFP_KERNEL);
        if (!pm8001_ha->tags)
                goto err_out;
        /* MPI Memory region 1 for AAP Event Log for fw */
        pm8001_ha->memoryMap.region[AAP1].num_elements = 1;
        pm8001_ha->memoryMap.region[AAP1].element_size = PM8001_EVENT_LOG_SIZE;
        pm8001_ha->memoryMap.region[AAP1].total_len = PM8001_EVENT_LOG_SIZE;
        pm8001_ha->memoryMap.region[AAP1].alignment = 32;

        /* MPI Memory region 2 for IOP Event Log for fw */
        pm8001_ha->memoryMap.region[IOP].num_elements = 1;
        pm8001_ha->memoryMap.region[IOP].element_size = PM8001_EVENT_LOG_SIZE;
        pm8001_ha->memoryMap.region[IOP].total_len = PM8001_EVENT_LOG_SIZE;
        pm8001_ha->memoryMap.region[IOP].alignment = 32;

        for (i = 0; i < PM8001_MAX_SPCV_INB_NUM; i++) {
                /* MPI Memory region 3 for consumer Index of inbound queues */
                pm8001_ha->memoryMap.region[CI+i].num_elements = 1;
                pm8001_ha->memoryMap.region[CI+i].element_size = 4;
                pm8001_ha->memoryMap.region[CI+i].total_len = 4;
                pm8001_ha->memoryMap.region[CI+i].alignment = 4;

                if ((ent->driver_data) != chip_8001) {
                        /* MPI Memory region 5 inbound queues */
                        pm8001_ha->memoryMap.region[IB+i].num_elements =
                                                PM8001_MPI_QUEUE;
                        pm8001_ha->memoryMap.region[IB+i].element_size = 128;
                        pm8001_ha->memoryMap.region[IB+i].total_len =
                                                PM8001_MPI_QUEUE * 128;
                        pm8001_ha->memoryMap.region[IB+i].alignment = 128;
                } else {
                        pm8001_ha->memoryMap.region[IB+i].num_elements =
                                                PM8001_MPI_QUEUE;
                        pm8001_ha->memoryMap.region[IB+i].element_size = 64;
                        pm8001_ha->memoryMap.region[IB+i].total_len =
                                                PM8001_MPI_QUEUE * 64;
                        pm8001_ha->memoryMap.region[IB+i].alignment = 64;
                }
        }

        for (i = 0; i < PM8001_MAX_SPCV_OUTB_NUM; i++) {
                /* MPI Memory region 4 for producer Index of outbound queues */
                pm8001_ha->memoryMap.region[PI+i].num_elements = 1;
                pm8001_ha->memoryMap.region[PI+i].element_size = 4;
                pm8001_ha->memoryMap.region[PI+i].total_len = 4;
                pm8001_ha->memoryMap.region[PI+i].alignment = 4;

                if (ent->driver_data != chip_8001) {
                        /* MPI Memory region 6 Outbound queues */
                        pm8001_ha->memoryMap.region[OB+i].num_elements =
                                                PM8001_MPI_QUEUE;
                        pm8001_ha->memoryMap.region[OB+i].element_size = 128;
                        pm8001_ha->memoryMap.region[OB+i].total_len =
                                                PM8001_MPI_QUEUE * 128;
                        pm8001_ha->memoryMap.region[OB+i].alignment = 128;
                } else {
                        /* MPI Memory region 6 Outbound queues */
                        pm8001_ha->memoryMap.region[OB+i].num_elements =
                                                PM8001_MPI_QUEUE;
                        pm8001_ha->memoryMap.region[OB+i].element_size = 64;
                        pm8001_ha->memoryMap.region[OB+i].total_len =
                                                PM8001_MPI_QUEUE * 64;
                        pm8001_ha->memoryMap.region[OB+i].alignment = 64;
                }

        }
        /* Memory region write DMA*/
        pm8001_ha->memoryMap.region[NVMD].num_elements = 1;
        pm8001_ha->memoryMap.region[NVMD].element_size = 4096;
        pm8001_ha->memoryMap.region[NVMD].total_len = 4096;
        /* Memory region for devices*/
        pm8001_ha->memoryMap.region[DEV_MEM].num_elements = 1;
        pm8001_ha->memoryMap.region[DEV_MEM].element_size = PM8001_MAX_DEVICES *
                sizeof(struct pm8001_device);
        pm8001_ha->memoryMap.region[DEV_MEM].total_len = PM8001_MAX_DEVICES *
                sizeof(struct pm8001_device);

        /* Memory region for ccb_info*/
        pm8001_ha->memoryMap.region[CCB_MEM].num_elements = 1;
        pm8001_ha->memoryMap.region[CCB_MEM].element_size = PM8001_MAX_CCB *
                sizeof(struct pm8001_ccb_info);
        pm8001_ha->memoryMap.region[CCB_MEM].total_len = PM8001_MAX_CCB *
                sizeof(struct pm8001_ccb_info);

        /* Memory region for fw flash */
        pm8001_ha->memoryMap.region[FW_FLASH].total_len = 4096;

        pm8001_ha->memoryMap.region[FORENSIC_MEM].num_elements = 1;
        pm8001_ha->memoryMap.region[FORENSIC_MEM].total_len = 0x10000;
        pm8001_ha->memoryMap.region[FORENSIC_MEM].element_size = 0x10000;
        pm8001_ha->memoryMap.region[FORENSIC_MEM].alignment = 0x10000;
        for (i = 0; i < USI_MAX_MEMCNT; i++) {
                if (pm8001_mem_alloc(pm8001_ha->pdev,
                        &pm8001_ha->memoryMap.region[i].virt_ptr,
                        &pm8001_ha->memoryMap.region[i].phys_addr,
                        &pm8001_ha->memoryMap.region[i].phys_addr_hi,
                        &pm8001_ha->memoryMap.region[i].phys_addr_lo,
                        pm8001_ha->memoryMap.region[i].total_len,
                        pm8001_ha->memoryMap.region[i].alignment) != 0) {
                                PM8001_FAIL_DBG(pm8001_ha,
                                        pm8001_printk("Mem%d alloc failed\n",
                                        i));
                                goto err_out;
                }
        }

        pm8001_ha->devices = pm8001_ha->memoryMap.region[DEV_MEM].virt_ptr;
        for (i = 0; i < PM8001_MAX_DEVICES; i++) {
                pm8001_ha->devices[i].dev_type = SAS_PHY_UNUSED;
                pm8001_ha->devices[i].id = i;
                pm8001_ha->devices[i].device_id = PM8001_MAX_DEVICES;
                pm8001_ha->devices[i].running_req = 0;
        }
        pm8001_ha->ccb_info = pm8001_ha->memoryMap.region[CCB_MEM].virt_ptr;
        for (i = 0; i < PM8001_MAX_CCB; i++) {
                pm8001_ha->ccb_info[i].ccb_dma_handle =
                        pm8001_ha->memoryMap.region[CCB_MEM].phys_addr +
                        i * sizeof(struct pm8001_ccb_info);
                pm8001_ha->ccb_info[i].task = NULL;
                pm8001_ha->ccb_info[i].ccb_tag = 0xffffffff;
                pm8001_ha->ccb_info[i].device = NULL;
                ++pm8001_ha->tags_num;
        }
        pm8001_ha->flags = PM8001F_INIT_TIME;
        /* Initialize tags */
        pm8001_tag_init(pm8001_ha);
        return 0;
err_out:
        return 1;
}

/**
 * pm8001_ioremap - remap the pci high physical address to kernal virtual
 * address so that we can access them.
 * @pm8001_ha:our hba structure.
 */
static int pm8001_ioremap(struct pm8001_hba_info *pm8001_ha)
{
        u32 bar;
        u32 logicalBar = 0;
        struct pci_dev *pdev;

        pdev = pm8001_ha->pdev;
        /* map pci mem (PMC pci base 0-3)*/
        for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
                /*
                ** logical BARs for SPC:
                ** bar 0 and 1 - logical BAR0
                ** bar 2 and 3 - logical BAR1
                ** bar4 - logical BAR2
                ** bar5 - logical BAR3
                ** Skip the appropriate assignments:
                */
                if ((bar == 1) || (bar == 3))
                        continue;
                if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) {
                        pm8001_ha->io_mem[logicalBar].membase =
                                pci_resource_start(pdev, bar);
                        pm8001_ha->io_mem[logicalBar].memsize =
                                pci_resource_len(pdev, bar);
                        pm8001_ha->io_mem[logicalBar].memvirtaddr =
                                ioremap(pm8001_ha->io_mem[logicalBar].membase,
                                pm8001_ha->io_mem[logicalBar].memsize);
                        PM8001_INIT_DBG(pm8001_ha,
                                pm8001_printk("PCI: bar %d, logicalBar %d ",
                                bar, logicalBar));
                        PM8001_INIT_DBG(pm8001_ha, pm8001_printk(
                                "base addr %llx virt_addr=%llx len=%d\n",
                                (u64)pm8001_ha->io_mem[logicalBar].membase,
                                (u64)(unsigned long)
                                pm8001_ha->io_mem[logicalBar].memvirtaddr,
                                pm8001_ha->io_mem[logicalBar].memsize));
                } else {
                        pm8001_ha->io_mem[logicalBar].membase   = 0;
                        pm8001_ha->io_mem[logicalBar].memsize   = 0;
                        pm8001_ha->io_mem[logicalBar].memvirtaddr = NULL;
                }
                logicalBar++;
        }
        return 0;
}

/**
 * pm8001_pci_alloc - initialize our ha card structure
 * @pdev: pci device.
 * @ent: ent
 * @shost: scsi host struct which has been initialized before.
 */
static struct pm8001_hba_info *pm8001_pci_alloc(struct pci_dev *pdev,
                                 const struct pci_device_id *ent,
                                struct Scsi_Host *shost)

{
        struct pm8001_hba_info *pm8001_ha;
        struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
        int j;

        pm8001_ha = sha->lldd_ha;
        if (!pm8001_ha)
                return NULL;

        pm8001_ha->pdev = pdev;
        pm8001_ha->dev = &pdev->dev;
        pm8001_ha->chip_id = ent->driver_data;
        pm8001_ha->chip = &pm8001_chips[pm8001_ha->chip_id];
        pm8001_ha->irq = pdev->irq;
        pm8001_ha->sas = sha;
        pm8001_ha->shost = shost;
        pm8001_ha->id = pm8001_id++;
        pm8001_ha->logging_level = logging_level;
        if (link_rate >= 1 && link_rate <= 15)
                pm8001_ha->link_rate = (link_rate << 8);
        else {
                pm8001_ha->link_rate = LINKRATE_15 | LINKRATE_30 |
                        LINKRATE_60 | LINKRATE_120;
                PM8001_FAIL_DBG(pm8001_ha, pm8001_printk(
                        "Setting link rate to default value\n"));
        }
        sprintf(pm8001_ha->name, "%s%d", DRV_NAME, pm8001_ha->id);
        /* IOMB size is 128 for 8088/89 controllers */
        if (pm8001_ha->chip_id != chip_8001)
                pm8001_ha->iomb_size = IOMB_SIZE_SPCV;
        else
                pm8001_ha->iomb_size = IOMB_SIZE_SPC;

#ifdef PM8001_USE_TASKLET
        /* Tasklet for non msi-x interrupt handler */
        if ((!pdev->msix_cap || !pci_msi_enabled())
            || (pm8001_ha->chip_id == chip_8001))
                tasklet_init(&pm8001_ha->tasklet[0], pm8001_tasklet,
                        (unsigned long)&(pm8001_ha->irq_vector[0]));
        else
                for (j = 0; j < PM8001_MAX_MSIX_VEC; j++)
                        tasklet_init(&pm8001_ha->tasklet[j], pm8001_tasklet,
                                (unsigned long)&(pm8001_ha->irq_vector[j]));
#endif
        pm8001_ioremap(pm8001_ha);
        if (!pm8001_alloc(pm8001_ha, ent))
                return pm8001_ha;
        pm8001_free(pm8001_ha);
        return NULL;
}

/**
 * pci_go_44 - pm8001 specified, its DMA is 44 bit rather than 64 bit
 * @pdev: pci device.
 */
static int pci_go_44(struct pci_dev *pdev)
{
        int rc;

        rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(44));
        if (rc) {
                rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
                if (rc)
                        dev_printk(KERN_ERR, &pdev->dev,
                                "32-bit DMA enable failed\n");
        }
        return rc;
}

/**
 * pm8001_prep_sas_ha_init - allocate memory in general hba struct && init them.
 * @shost: scsi host which has been allocated outside.
 * @chip_info: our ha struct.
 */
static int pm8001_prep_sas_ha_init(struct Scsi_Host *shost,
                                   const struct pm8001_chip_info *chip_info)
{
        int phy_nr, port_nr;
        struct asd_sas_phy **arr_phy;
        struct asd_sas_port **arr_port;
        struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);

        phy_nr = chip_info->n_phy;
        port_nr = phy_nr;
        memset(sha, 0x00, sizeof(*sha));
        arr_phy = kcalloc(phy_nr, sizeof(void *), GFP_KERNEL);
        if (!arr_phy)
                goto exit;
        arr_port = kcalloc(port_nr, sizeof(void *), GFP_KERNEL);
        if (!arr_port)
                goto exit_free2;

        sha->sas_phy = arr_phy;
        sha->sas_port = arr_port;
        sha->lldd_ha = kzalloc(sizeof(struct pm8001_hba_info), GFP_KERNEL);
        if (!sha->lldd_ha)
                goto exit_free1;

        shost->transportt = pm8001_stt;
        shost->max_id = PM8001_MAX_DEVICES;
        shost->max_lun = 8;
        shost->max_channel = 0;
        shost->unique_id = pm8001_id;
        shost->max_cmd_len = 16;
        shost->can_queue = PM8001_CAN_QUEUE;
        shost->cmd_per_lun = 32;
        return 0;
exit_free1:
        kfree(arr_port);
exit_free2:
        kfree(arr_phy);
exit:
        return -1;
}

/**
 * pm8001_post_sas_ha_init - initialize general hba struct defined in libsas
 * @shost: scsi host which has been allocated outside
 * @chip_info: our ha struct.
 */
static void  pm8001_post_sas_ha_init(struct Scsi_Host *shost,
                                     const struct pm8001_chip_info *chip_info)
{
        int i = 0;
        struct pm8001_hba_info *pm8001_ha;
        struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);

        pm8001_ha = sha->lldd_ha;
        for (i = 0; i < chip_info->n_phy; i++) {
                sha->sas_phy[i] = &pm8001_ha->phy[i].sas_phy;
                sha->sas_port[i] = &pm8001_ha->port[i].sas_port;
                sha->sas_phy[i]->sas_addr =
                        (u8 *)&pm8001_ha->phy[i].dev_sas_addr;
        }
        sha->sas_ha_name = DRV_NAME;
        sha->dev = pm8001_ha->dev;
        sha->strict_wide_ports = 1;
        sha->lldd_module = THIS_MODULE;
        sha->sas_addr = &pm8001_ha->sas_addr[0];
        sha->num_phys = chip_info->n_phy;
        sha->core.shost = shost;
}

/**
 * pm8001_init_sas_add - initialize sas address
 * @chip_info: our ha struct.
 *
 * Currently we just set the fixed SAS address to our HBA,for manufacture,
 * it should read from the EEPROM
 */
static void pm8001_init_sas_add(struct pm8001_hba_info *pm8001_ha)
{
        u8 i, j;
        u8 sas_add[8];
#ifdef PM8001_READ_VPD
        /* For new SPC controllers WWN is stored in flash vpd
        *  For SPC/SPCve controllers WWN is stored in EEPROM
        *  For Older SPC WWN is stored in NVMD
        */
        DECLARE_COMPLETION_ONSTACK(completion);
        struct pm8001_ioctl_payload payload;
        u16 deviceid;
        int rc;

        pci_read_config_word(pm8001_ha->pdev, PCI_DEVICE_ID, &deviceid);
        pm8001_ha->nvmd_completion = &completion;

        if (pm8001_ha->chip_id == chip_8001) {
                if (deviceid == 0x8081 || deviceid == 0x0042) {
                        payload.minor_function = 4;
                        payload.length = 4096;
                } else {
                        payload.minor_function = 0;
                        payload.length = 128;
                }
        } else if ((pm8001_ha->chip_id == chip_8070 ||
                        pm8001_ha->chip_id == chip_8072) &&
                        pm8001_ha->pdev->subsystem_vendor == PCI_VENDOR_ID_ATTO) {
                payload.minor_function = 4;
                payload.length = 4096;
        } else {
                payload.minor_function = 1;
                payload.length = 4096;
        }
        payload.offset = 0;
        payload.func_specific = kzalloc(payload.length, GFP_KERNEL);
        if (!payload.func_specific) {
                PM8001_INIT_DBG(pm8001_ha, pm8001_printk("mem alloc fail\n"));
                return;
        }
        rc = PM8001_CHIP_DISP->get_nvmd_req(pm8001_ha, &payload);
        if (rc) {
                kfree(payload.func_specific);
                PM8001_INIT_DBG(pm8001_ha, pm8001_printk("nvmd failed\n"));
                return;
        }
        wait_for_completion(&completion);

        for (i = 0, j = 0; i <= 7; i++, j++) {
                if (pm8001_ha->chip_id == chip_8001) {
                        if (deviceid == 0x8081)
                                pm8001_ha->sas_addr[j] =
                                        payload.func_specific[0x704 + i];
                        else if (deviceid == 0x0042)
                                pm8001_ha->sas_addr[j] =
                                        payload.func_specific[0x010 + i];
                } else if ((pm8001_ha->chip_id == chip_8070 ||
                                pm8001_ha->chip_id == chip_8072) &&
                                pm8001_ha->pdev->subsystem_vendor == PCI_VENDOR_ID_ATTO) {
                        pm8001_ha->sas_addr[j] =
                                        payload.func_specific[0x010 + i];
                } else
                        pm8001_ha->sas_addr[j] =
                                        payload.func_specific[0x804 + i];
        }
        memcpy(sas_add, pm8001_ha->sas_addr, SAS_ADDR_SIZE);
        for (i = 0; i < pm8001_ha->chip->n_phy; i++) {
                if (i && ((i % 4) == 0))
                        sas_add[7] = sas_add[7] + 4;
                memcpy(&pm8001_ha->phy[i].dev_sas_addr,
                        sas_add, SAS_ADDR_SIZE);
                PM8001_INIT_DBG(pm8001_ha,
                        pm8001_printk("phy %d sas_addr = %016llx\n", i,
                        pm8001_ha->phy[i].dev_sas_addr));
        }
        kfree(payload.func_specific);
#else
        for (i = 0; i < pm8001_ha->chip->n_phy; i++) {
                pm8001_ha->phy[i].dev_sas_addr = 0x50010c600047f9d0ULL;
                pm8001_ha->phy[i].dev_sas_addr =
                        cpu_to_be64((u64)
                                (*(u64 *)&pm8001_ha->phy[i].dev_sas_addr));
        }
        memcpy(pm8001_ha->sas_addr, &pm8001_ha->phy[0].dev_sas_addr,
                SAS_ADDR_SIZE);
#endif
}

/*
 * pm8001_get_phy_settings_info : Read phy setting values.
 * @pm8001_ha : our hba.
 */
static int pm8001_get_phy_settings_info(struct pm8001_hba_info *pm8001_ha)
{

#ifdef PM8001_READ_VPD
        /*OPTION ROM FLASH read for the SPC cards */
        DECLARE_COMPLETION_ONSTACK(completion);
        struct pm8001_ioctl_payload payload;
        int rc;

        pm8001_ha->nvmd_completion = &completion;
        /* SAS ADDRESS read from flash / EEPROM */
        payload.minor_function = 6;
        payload.offset = 0;
        payload.length = 4096;
        payload.func_specific = kzalloc(4096, GFP_KERNEL);
        if (!payload.func_specific)
                return -ENOMEM;
        /* Read phy setting values from flash */
        rc = PM8001_CHIP_DISP->get_nvmd_req(pm8001_ha, &payload);
        if (rc) {
                kfree(payload.func_specific);
                PM8001_INIT_DBG(pm8001_ha, pm8001_printk("nvmd failed\n"));
                return -ENOMEM;
        }
        wait_for_completion(&completion);
        pm8001_set_phy_profile(pm8001_ha, sizeof(u8), payload.func_specific);
        kfree(payload.func_specific);
#endif
        return 0;
}

struct pm8001_mpi3_phy_pg_trx_config {
        u32 LaneLosCfg;
        u32 LanePgaCfg1;
        u32 LanePisoCfg1;
        u32 LanePisoCfg2;
        u32 LanePisoCfg3;
        u32 LanePisoCfg4;
        u32 LanePisoCfg5;
        u32 LanePisoCfg6;
        u32 LaneBctCtrl;
};

/**
 * pm8001_get_internal_phy_settings : Retrieves the internal PHY settings
 * @pm8001_ha : our adapter
 * @phycfg : PHY config page to populate
 */
static
void pm8001_get_internal_phy_settings(struct pm8001_hba_info *pm8001_ha,
                struct pm8001_mpi3_phy_pg_trx_config *phycfg)
{
        phycfg->LaneLosCfg   = 0x00000132;
        phycfg->LanePgaCfg1  = 0x00203949;
        phycfg->LanePisoCfg1 = 0x000000FF;
        phycfg->LanePisoCfg2 = 0xFF000001;
        phycfg->LanePisoCfg3 = 0xE7011300;
        phycfg->LanePisoCfg4 = 0x631C40C0;
        phycfg->LanePisoCfg5 = 0xF8102036;
        phycfg->LanePisoCfg6 = 0xF74A1000;
        phycfg->LaneBctCtrl  = 0x00FB33F8;
}

/**
 * pm8001_get_external_phy_settings : Retrieves the external PHY settings
 * @pm8001_ha : our adapter
 * @phycfg : PHY config page to populate
 */
static
void pm8001_get_external_phy_settings(struct pm8001_hba_info *pm8001_ha,
                struct pm8001_mpi3_phy_pg_trx_config *phycfg)
{
        phycfg->LaneLosCfg   = 0x00000132;
        phycfg->LanePgaCfg1  = 0x00203949;
        phycfg->LanePisoCfg1 = 0x000000FF;
        phycfg->LanePisoCfg2 = 0xFF000001;
        phycfg->LanePisoCfg3 = 0xE7011300;
        phycfg->LanePisoCfg4 = 0x63349140;
        phycfg->LanePisoCfg5 = 0xF8102036;
        phycfg->LanePisoCfg6 = 0xF80D9300;
        phycfg->LaneBctCtrl  = 0x00FB33F8;
}

/**
 * pm8001_get_phy_mask : Retrieves the mask that denotes if a PHY is int/ext
 * @pm8001_ha : our adapter
 * @phymask : The PHY mask
 */
static
void pm8001_get_phy_mask(struct pm8001_hba_info *pm8001_ha, int *phymask)
{
        switch (pm8001_ha->pdev->subsystem_device) {
        case 0x0070: /* H1280 - 8 external 0 internal */
        case 0x0072: /* H12F0 - 16 external 0 internal */
                *phymask = 0x0000;
                break;

        case 0x0071: /* H1208 - 0 external 8 internal */
        case 0x0073: /* H120F - 0 external 16 internal */
                *phymask = 0xFFFF;
                break;

        case 0x0080: /* H1244 - 4 external 4 internal */
                *phymask = 0x00F0;
                break;

        case 0x0081: /* H1248 - 4 external 8 internal */
                *phymask = 0x0FF0;
                break;

        case 0x0082: /* H1288 - 8 external 8 internal */
                *phymask = 0xFF00;
                break;

        default:
                PM8001_INIT_DBG(pm8001_ha,
                        pm8001_printk("Unknown subsystem device=0x%.04x",
                                pm8001_ha->pdev->subsystem_device));
        }
}

/**
 * pm8001_set_phy_settings_ven_117c_12Gb : Configure ATTO 12Gb PHY settings
 * @pm8001_ha : our adapter
 */
static
int pm8001_set_phy_settings_ven_117c_12G(struct pm8001_hba_info *pm8001_ha)
{
        struct pm8001_mpi3_phy_pg_trx_config phycfg_int;
        struct pm8001_mpi3_phy_pg_trx_config phycfg_ext;
        int phymask = 0;
        int i = 0;

        memset(&phycfg_int, 0, sizeof(phycfg_int));
        memset(&phycfg_ext, 0, sizeof(phycfg_ext));

        pm8001_get_internal_phy_settings(pm8001_ha, &phycfg_int);
        pm8001_get_external_phy_settings(pm8001_ha, &phycfg_ext);
        pm8001_get_phy_mask(pm8001_ha, &phymask);

        for (i = 0; i < pm8001_ha->chip->n_phy; i++) {
                if (phymask & (1 << i)) {/* Internal PHY */
                        pm8001_set_phy_profile_single(pm8001_ha, i,
                                        sizeof(phycfg_int) / sizeof(u32),
                                        (u32 *)&phycfg_int);

                } else { /* External PHY */
                        pm8001_set_phy_profile_single(pm8001_ha, i,
                                        sizeof(phycfg_ext) / sizeof(u32),
                                        (u32 *)&phycfg_ext);
                }
        }

        return 0;
}

/**
 * pm8001_configure_phy_settings : Configures PHY settings based on vendor ID.
 * @pm8001_ha : our hba.
 */
static int pm8001_configure_phy_settings(struct pm8001_hba_info *pm8001_ha)
{
        switch (pm8001_ha->pdev->subsystem_vendor) {
        case PCI_VENDOR_ID_ATTO:
                if (pm8001_ha->pdev->device == 0x0042) /* 6Gb */
                        return 0;
                else
                        return pm8001_set_phy_settings_ven_117c_12G(pm8001_ha);

        case PCI_VENDOR_ID_ADAPTEC2:
        case 0:
                return 0;

        default:
                return pm8001_get_phy_settings_info(pm8001_ha);
        }
}

#ifdef PM8001_USE_MSIX
/**
 * pm8001_setup_msix - enable MSI-X interrupt
 * @chip_info: our ha struct.
 * @irq_handler: irq_handler
 */
static u32 pm8001_setup_msix(struct pm8001_hba_info *pm8001_ha)
{
        u32 i = 0, j = 0;
        u32 number_of_intr;
        int flag = 0;
        int rc;

        /* SPCv controllers supports 64 msi-x */
        if (pm8001_ha->chip_id == chip_8001) {
                number_of_intr = 1;
        } else {
                number_of_intr = PM8001_MAX_MSIX_VEC;
                flag &= ~IRQF_SHARED;
        }

        rc = pci_alloc_irq_vectors(pm8001_ha->pdev, number_of_intr,
                        number_of_intr, PCI_IRQ_MSIX);
        if (rc < 0)
                return rc;
        pm8001_ha->number_of_intr = number_of_intr;

        PM8001_INIT_DBG(pm8001_ha, pm8001_printk(
                "pci_alloc_irq_vectors request ret:%d no of intr %d\n",
                                rc, pm8001_ha->number_of_intr));

        for (i = 0; i < number_of_intr; i++) {
                snprintf(pm8001_ha->intr_drvname[i],
                        sizeof(pm8001_ha->intr_drvname[0]),
                        "%s-%d", pm8001_ha->name, i);
                pm8001_ha->irq_vector[i].irq_id = i;
                pm8001_ha->irq_vector[i].drv_inst = pm8001_ha;

                rc = request_irq(pci_irq_vector(pm8001_ha->pdev, i),
                        pm8001_interrupt_handler_msix, flag,
                        pm8001_ha->intr_drvname[i],
                        &(pm8001_ha->irq_vector[i]));
                if (rc) {
                        for (j = 0; j < i; j++) {
                                free_irq(pci_irq_vector(pm8001_ha->pdev, i),
                                        &(pm8001_ha->irq_vector[i]));
                        }
                        pci_free_irq_vectors(pm8001_ha->pdev);
                        break;
                }
        }

        return rc;
}
#endif

/**
 * pm8001_request_irq - register interrupt
 * @chip_info: our ha struct.
 */
static u32 pm8001_request_irq(struct pm8001_hba_info *pm8001_ha)
{
        struct pci_dev *pdev;
        int rc;

        pdev = pm8001_ha->pdev;

#ifdef PM8001_USE_MSIX
        if (pdev->msix_cap && pci_msi_enabled())
                return pm8001_setup_msix(pm8001_ha);
        else {
                PM8001_INIT_DBG(pm8001_ha,
                        pm8001_printk("MSIX not supported!!!\n"));
                goto intx;
        }
#endif

intx:
        /* initialize the INT-X interrupt */
        pm8001_ha->irq_vector[0].irq_id = 0;
        pm8001_ha->irq_vector[0].drv_inst = pm8001_ha;
        rc = request_irq(pdev->irq, pm8001_interrupt_handler_intx, IRQF_SHARED,
                pm8001_ha->name, SHOST_TO_SAS_HA(pm8001_ha->shost));
        return rc;
}

/**
 * pm8001_pci_probe - probe supported device
 * @pdev: pci device which kernel has been prepared for.
 * @ent: pci device id
 *
 * This function is the main initialization function, when register a new
 * pci driver it is invoked, all struct an hardware initilization should be done
 * here, also, register interrupt
 */
static int pm8001_pci_probe(struct pci_dev *pdev,
                            const struct pci_device_id *ent)
{
        unsigned int rc;
        u32     pci_reg;
        u8      i = 0;
        struct pm8001_hba_info *pm8001_ha;
        struct Scsi_Host *shost = NULL;
        const struct pm8001_chip_info *chip;

        dev_printk(KERN_INFO, &pdev->dev,
                "pm80xx: driver version %s\n", DRV_VERSION);
        rc = pci_enable_device(pdev);
        if (rc)
                goto err_out_enable;
        pci_set_master(pdev);
        /*
         * Enable pci slot busmaster by setting pci command register.

         * This is required by FW for Cyclone card.
         */

        pci_read_config_dword(pdev, PCI_COMMAND, &pci_reg);
        pci_reg |= 0x157;
        pci_write_config_dword(pdev, PCI_COMMAND, pci_reg);
        rc = pci_request_regions(pdev, DRV_NAME);
        if (rc)
                goto err_out_disable;
        rc = pci_go_44(pdev);
        if (rc)
                goto err_out_regions;

        shost = scsi_host_alloc(&pm8001_sht, sizeof(void *));
        if (!shost) {
                rc = -ENOMEM;
                goto err_out_regions;
        }
        chip = &pm8001_chips[ent->driver_data];
        SHOST_TO_SAS_HA(shost) =
                kzalloc(sizeof(struct sas_ha_struct), GFP_KERNEL);
        if (!SHOST_TO_SAS_HA(shost)) {
                rc = -ENOMEM;
                goto err_out_free_host;
        }

        rc = pm8001_prep_sas_ha_init(shost, chip);
        if (rc) {
                rc = -ENOMEM;
                goto err_out_free;
        }
        pci_set_drvdata(pdev, SHOST_TO_SAS_HA(shost));
        /* ent->driver variable is used to differentiate between controllers */
        pm8001_ha = pm8001_pci_alloc(pdev, ent, shost);
        if (!pm8001_ha) {
                rc = -ENOMEM;
                goto err_out_free;
        }
        list_add_tail(&pm8001_ha->list, &hba_list);
        PM8001_CHIP_DISP->chip_soft_rst(pm8001_ha);
        rc = PM8001_CHIP_DISP->chip_init(pm8001_ha);
        if (rc) {
                PM8001_FAIL_DBG(pm8001_ha, pm8001_printk(
                        "chip_init failed [ret: %d]\n", rc));
                goto err_out_ha_free;
        }

        rc = scsi_add_host(shost, &pdev->dev);
        if (rc)
                goto err_out_ha_free;
        rc = pm8001_request_irq(pm8001_ha);
        if (rc) {
                PM8001_FAIL_DBG(pm8001_ha, pm8001_printk(
                        "pm8001_request_irq failed [ret: %d]\n", rc));
                goto err_out_shost;
        }

        PM8001_CHIP_DISP->interrupt_enable(pm8001_ha, 0);
        if (pm8001_ha->chip_id != chip_8001) {
                for (i = 1; i < pm8001_ha->number_of_intr; i++)
                        PM8001_CHIP_DISP->interrupt_enable(pm8001_ha, i);
                /* setup thermal configuration. */
                pm80xx_set_thermal_config(pm8001_ha);
        }

        pm8001_init_sas_add(pm8001_ha);
        /* phy setting support for motherboard controller */
        if (pm8001_configure_phy_settings(pm8001_ha))
                goto err_out_shost;

        pm8001_post_sas_ha_init(shost, chip);
        rc = sas_register_ha(SHOST_TO_SAS_HA(shost));
        if (rc)
                goto err_out_shost;
        scsi_scan_host(pm8001_ha->shost);
        pm8001_ha->flags = PM8001F_RUN_TIME;
        return 0;

err_out_shost:
        scsi_remove_host(pm8001_ha->shost);
err_out_ha_free:
        pm8001_free(pm8001_ha);
err_out_free:
        kfree(SHOST_TO_SAS_HA(shost));
err_out_free_host:
        scsi_host_put(shost);
err_out_regions:
        pci_release_regions(pdev);
err_out_disable:
        pci_disable_device(pdev);
err_out_enable:
        return rc;
}

static void pm8001_pci_remove(struct pci_dev *pdev)
{
        struct sas_ha_struct *sha = pci_get_drvdata(pdev);
        struct pm8001_hba_info *pm8001_ha;
        int i, j;
        pm8001_ha = sha->lldd_ha;
        sas_unregister_ha(sha);
        sas_remove_host(pm8001_ha->shost);
        list_del(&pm8001_ha->list);
        PM8001_CHIP_DISP->interrupt_disable(pm8001_ha, 0xFF);
        PM8001_CHIP_DISP->chip_soft_rst(pm8001_ha);

#ifdef PM8001_USE_MSIX
        for (i = 0; i < pm8001_ha->number_of_intr; i++)
                synchronize_irq(pci_irq_vector(pdev, i));
        for (i = 0; i < pm8001_ha->number_of_intr; i++)
                free_irq(pci_irq_vector(pdev, i), &pm8001_ha->irq_vector[i]);
        pci_free_irq_vectors(pdev);
#else
        free_irq(pm8001_ha->irq, sha);
#endif
#ifdef PM8001_USE_TASKLET
        /* For non-msix and msix interrupts */
        if ((!pdev->msix_cap || !pci_msi_enabled()) ||
            (pm8001_ha->chip_id == chip_8001))
                tasklet_kill(&pm8001_ha->tasklet[0]);
        else
                for (j = 0; j < PM8001_MAX_MSIX_VEC; j++)
                        tasklet_kill(&pm8001_ha->tasklet[j]);
#endif
        scsi_host_put(pm8001_ha->shost);
        pm8001_free(pm8001_ha);
        kfree(sha->sas_phy);
        kfree(sha->sas_port);
        kfree(sha);
        pci_release_regions(pdev);
        pci_disable_device(pdev);
}

/**
 * pm8001_pci_suspend - power management suspend main entry point
 * @pdev: PCI device struct
 * @state: PM state change to (usually PCI_D3)
 *
 * Returns 0 success, anything else error.
 */
static int pm8001_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
        struct sas_ha_struct *sha = pci_get_drvdata(pdev);
        struct pm8001_hba_info *pm8001_ha;
        int  i, j;
        u32 device_state;
        pm8001_ha = sha->lldd_ha;
        sas_suspend_ha(sha);
        flush_workqueue(pm8001_wq);
        scsi_block_requests(pm8001_ha->shost);
        if (!pdev->pm_cap) {
                dev_err(&pdev->dev, " PCI PM not supported\n");
                return -ENODEV;
        }
        PM8001_CHIP_DISP->interrupt_disable(pm8001_ha, 0xFF);
        PM8001_CHIP_DISP->chip_soft_rst(pm8001_ha);
#ifdef PM8001_USE_MSIX
        for (i = 0; i < pm8001_ha->number_of_intr; i++)
                synchronize_irq(pci_irq_vector(pdev, i));
        for (i = 0; i < pm8001_ha->number_of_intr; i++)
                free_irq(pci_irq_vector(pdev, i), &pm8001_ha->irq_vector[i]);
        pci_free_irq_vectors(pdev);
#else
        free_irq(pm8001_ha->irq, sha);
#endif
#ifdef PM8001_USE_TASKLET
        /* For non-msix and msix interrupts */
        if ((!pdev->msix_cap || !pci_msi_enabled()) ||
            (pm8001_ha->chip_id == chip_8001))
                tasklet_kill(&pm8001_ha->tasklet[0]);
        else
                for (j = 0; j < PM8001_MAX_MSIX_VEC; j++)
                        tasklet_kill(&pm8001_ha->tasklet[j]);
#endif
        device_state = pci_choose_state(pdev, state);
        pm8001_printk("pdev=0x%p, slot=%s, entering "
                      "operating state [D%d]\n", pdev,
                      pm8001_ha->name, device_state);
        pci_save_state(pdev);
        pci_disable_device(pdev);
        pci_set_power_state(pdev, device_state);
        return 0;
}

/**
 * pm8001_pci_resume - power management resume main entry point
 * @pdev: PCI device struct
 *
 * Returns 0 success, anything else error.
 */
static int pm8001_pci_resume(struct pci_dev *pdev)
{
        struct sas_ha_struct *sha = pci_get_drvdata(pdev);
        struct pm8001_hba_info *pm8001_ha;
        int rc;
        u8 i = 0, j;
        u32 device_state;
        DECLARE_COMPLETION_ONSTACK(completion);
        pm8001_ha = sha->lldd_ha;
        device_state = pdev->current_state;

        pm8001_printk("pdev=0x%p, slot=%s, resuming from previous "
                "operating state [D%d]\n", pdev, pm8001_ha->name, device_state);

        pci_set_power_state(pdev, PCI_D0);
        pci_enable_wake(pdev, PCI_D0, 0);
        pci_restore_state(pdev);
        rc = pci_enable_device(pdev);
        if (rc) {
                pm8001_printk("slot=%s Enable device failed during resume\n",
                              pm8001_ha->name);
                goto err_out_enable;
        }

        pci_set_master(pdev);
        rc = pci_go_44(pdev);
        if (rc)
                goto err_out_disable;
        sas_prep_resume_ha(sha);
        /* chip soft rst only for spc */
        if (pm8001_ha->chip_id == chip_8001) {
                PM8001_CHIP_DISP->chip_soft_rst(pm8001_ha);
                PM8001_INIT_DBG(pm8001_ha,
                        pm8001_printk("chip soft reset successful\n"));
        }
        rc = PM8001_CHIP_DISP->chip_init(pm8001_ha);
        if (rc)
                goto err_out_disable;

        /* disable all the interrupt bits */
        PM8001_CHIP_DISP->interrupt_disable(pm8001_ha, 0xFF);

        rc = pm8001_request_irq(pm8001_ha);
        if (rc)
                goto err_out_disable;
#ifdef PM8001_USE_TASKLET
        /*  Tasklet for non msi-x interrupt handler */
        if ((!pdev->msix_cap || !pci_msi_enabled()) ||
            (pm8001_ha->chip_id == chip_8001))
                tasklet_init(&pm8001_ha->tasklet[0], pm8001_tasklet,
                        (unsigned long)&(pm8001_ha->irq_vector[0]));
        else
                for (j = 0; j < PM8001_MAX_MSIX_VEC; j++)
                        tasklet_init(&pm8001_ha->tasklet[j], pm8001_tasklet,
                                (unsigned long)&(pm8001_ha->irq_vector[j]));
#endif
        PM8001_CHIP_DISP->interrupt_enable(pm8001_ha, 0);
        if (pm8001_ha->chip_id != chip_8001) {
                for (i = 1; i < pm8001_ha->number_of_intr; i++)
                        PM8001_CHIP_DISP->interrupt_enable(pm8001_ha, i);
        }

        /* Chip documentation for the 8070 and 8072 SPCv    */
        /* states that a 500ms minimum delay is required    */
        /* before issuing commands. Otherwise, the firmware */
        /* will enter an unrecoverable state.               */

        if (pm8001_ha->chip_id == chip_8070 ||
                pm8001_ha->chip_id == chip_8072) {
                mdelay(500);
        }

        /* Spin up the PHYs */

        pm8001_ha->flags = PM8001F_RUN_TIME;
        for (i = 0; i < pm8001_ha->chip->n_phy; i++) {
                pm8001_ha->phy[i].enable_completion = &completion;
                PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
                wait_for_completion(&completion);
        }
        sas_resume_ha(sha);
        return 0;

err_out_disable:
        scsi_remove_host(pm8001_ha->shost);
        pci_disable_device(pdev);
err_out_enable:
        return rc;
}

/* update of pci device, vendor id and driver data with
 * unique value for each of the controller
 */
static struct pci_device_id pm8001_pci_table[] = {
        { PCI_VDEVICE(PMC_Sierra, 0x8001), chip_8001 },
        { PCI_VDEVICE(PMC_Sierra, 0x8006), chip_8006 },
        { PCI_VDEVICE(ADAPTEC2, 0x8006), chip_8006 },
        { PCI_VDEVICE(ATTO, 0x0042), chip_8001 },
        /* Support for SPC/SPCv/SPCve controllers */
        { PCI_VDEVICE(ADAPTEC2, 0x8001), chip_8001 },
        { PCI_VDEVICE(PMC_Sierra, 0x8008), chip_8008 },
        { PCI_VDEVICE(ADAPTEC2, 0x8008), chip_8008 },
        { PCI_VDEVICE(PMC_Sierra, 0x8018), chip_8018 },
        { PCI_VDEVICE(ADAPTEC2, 0x8018), chip_8018 },
        { PCI_VDEVICE(PMC_Sierra, 0x8009), chip_8009 },
        { PCI_VDEVICE(ADAPTEC2, 0x8009), chip_8009 },
        { PCI_VDEVICE(PMC_Sierra, 0x8019), chip_8019 },
        { PCI_VDEVICE(ADAPTEC2, 0x8019), chip_8019 },
        { PCI_VDEVICE(PMC_Sierra, 0x8074), chip_8074 },
        { PCI_VDEVICE(ADAPTEC2, 0x8074), chip_8074 },
        { PCI_VDEVICE(PMC_Sierra, 0x8076), chip_8076 },
        { PCI_VDEVICE(ADAPTEC2, 0x8076), chip_8076 },
        { PCI_VDEVICE(PMC_Sierra, 0x8077), chip_8077 },
        { PCI_VDEVICE(ADAPTEC2, 0x8077), chip_8077 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8081,
                PCI_VENDOR_ID_ADAPTEC2, 0x0400, 0, 0, chip_8001 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8081,
                PCI_VENDOR_ID_ADAPTEC2, 0x0800, 0, 0, chip_8001 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8088,
                PCI_VENDOR_ID_ADAPTEC2, 0x0008, 0, 0, chip_8008 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8088,
                PCI_VENDOR_ID_ADAPTEC2, 0x0800, 0, 0, chip_8008 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8089,
                PCI_VENDOR_ID_ADAPTEC2, 0x0008, 0, 0, chip_8009 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8089,
                PCI_VENDOR_ID_ADAPTEC2, 0x0800, 0, 0, chip_8009 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8088,
                PCI_VENDOR_ID_ADAPTEC2, 0x0016, 0, 0, chip_8018 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8088,
                PCI_VENDOR_ID_ADAPTEC2, 0x1600, 0, 0, chip_8018 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8089,
                PCI_VENDOR_ID_ADAPTEC2, 0x0016, 0, 0, chip_8019 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8089,
                PCI_VENDOR_ID_ADAPTEC2, 0x1600, 0, 0, chip_8019 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8074,
                PCI_VENDOR_ID_ADAPTEC2, 0x0800, 0, 0, chip_8074 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8076,
                PCI_VENDOR_ID_ADAPTEC2, 0x1600, 0, 0, chip_8076 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8077,
                PCI_VENDOR_ID_ADAPTEC2, 0x1600, 0, 0, chip_8077 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8074,
                PCI_VENDOR_ID_ADAPTEC2, 0x0008, 0, 0, chip_8074 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8076,
                PCI_VENDOR_ID_ADAPTEC2, 0x0016, 0, 0, chip_8076 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8077,
                PCI_VENDOR_ID_ADAPTEC2, 0x0016, 0, 0, chip_8077 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8076,
                PCI_VENDOR_ID_ADAPTEC2, 0x0808, 0, 0, chip_8076 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8077,
                PCI_VENDOR_ID_ADAPTEC2, 0x0808, 0, 0, chip_8077 },
        { PCI_VENDOR_ID_ADAPTEC2, 0x8074,
                PCI_VENDOR_ID_ADAPTEC2, 0x0404, 0, 0, chip_8074 },
        { PCI_VENDOR_ID_ATTO, 0x8070,
                PCI_VENDOR_ID_ATTO, 0x0070, 0, 0, chip_8070 },
        { PCI_VENDOR_ID_ATTO, 0x8070,
                PCI_VENDOR_ID_ATTO, 0x0071, 0, 0, chip_8070 },
        { PCI_VENDOR_ID_ATTO, 0x8072,
                PCI_VENDOR_ID_ATTO, 0x0072, 0, 0, chip_8072 },
        { PCI_VENDOR_ID_ATTO, 0x8072,
                PCI_VENDOR_ID_ATTO, 0x0073, 0, 0, chip_8072 },
        { PCI_VENDOR_ID_ATTO, 0x8070,
                PCI_VENDOR_ID_ATTO, 0x0080, 0, 0, chip_8070 },
        { PCI_VENDOR_ID_ATTO, 0x8072,
                PCI_VENDOR_ID_ATTO, 0x0081, 0, 0, chip_8072 },
        { PCI_VENDOR_ID_ATTO, 0x8072,
                PCI_VENDOR_ID_ATTO, 0x0082, 0, 0, chip_8072 },
        {} /* terminate list */
};

static struct pci_driver pm8001_pci_driver = {
        .name           = DRV_NAME,
        .id_table       = pm8001_pci_table,
        .probe          = pm8001_pci_probe,
        .remove         = pm8001_pci_remove,
        .suspend        = pm8001_pci_suspend,
        .resume         = pm8001_pci_resume,
};

/**
 *      pm8001_init - initialize scsi transport template
 */
static int __init pm8001_init(void)
{
        int rc = -ENOMEM;

        pm8001_wq = alloc_workqueue("pm80xx", 0, 0);
        if (!pm8001_wq)
                goto err;

        pm8001_id = 0;
        pm8001_stt = sas_domain_attach_transport(&pm8001_transport_ops);
        if (!pm8001_stt)
                goto err_wq;
        rc = pci_register_driver(&pm8001_pci_driver);
        if (rc)
                goto err_tp;
        return 0;

err_tp:
        sas_release_transport(pm8001_stt);
err_wq:
        destroy_workqueue(pm8001_wq);
err:
        return rc;
}

static void __exit pm8001_exit(void)
{
        pci_unregister_driver(&pm8001_pci_driver);
        sas_release_transport(pm8001_stt);
        destroy_workqueue(pm8001_wq);
}

module_init(pm8001_init);
module_exit(pm8001_exit);

MODULE_AUTHOR("Jack Wang <jack_wang@usish.com>");
MODULE_AUTHOR("Anand Kumar Santhanam <AnandKumar.Santhanam@pmcs.com>");
MODULE_AUTHOR("Sangeetha Gnanasekaran <Sangeetha.Gnanasekaran@pmcs.com>");
MODULE_AUTHOR("Nikith Ganigarakoppal <Nikith.Ganigarakoppal@pmcs.com>");
MODULE_DESCRIPTION(
                "PMC-Sierra PM8001/8006/8081/8088/8089/8074/8076/8077/8070/8072 "
                "SAS/SATA controller driver");
MODULE_VERSION(DRV_VERSION);
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, pm8001_pci_table);