/*
 * megaraid_sas.c: source for mega_sas driver
 *
 * MegaRAID device driver for SAS controllers
 * Copyright (c) 2005-2008, LSI Logic Corporation.
 * All rights reserved.
 *
 * Version:
 * Author:
 *              Rajesh Prabhakaran<Rajesh.Prabhakaran@lsil.com>
 *              Seokmann Ju
 *
 * 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.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the author nor the names of its contributors may be
 *    used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * 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 MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, 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
 * DAMAGE.
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 * Copyright (c) 2011 Bayard G. Bell. All rights reserved.
 */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/file.h>
#include <sys/errno.h>
#include <sys/open.h>
#include <sys/cred.h>
#include <sys/modctl.h>
#include <sys/conf.h>
#include <sys/devops.h>
#include <sys/cmn_err.h>
#include <sys/kmem.h>
#include <sys/stat.h>
#include <sys/mkdev.h>
#include <sys/pci.h>
#include <sys/scsi/scsi.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/atomic.h>
#include <sys/signal.h>

#include "megaraid_sas.h"

/*
 * FMA header files
 */
#include <sys/ddifm.h>
#include <sys/fm/protocol.h>
#include <sys/fm/util.h>
#include <sys/fm/io/ddi.h>

/*
 * Local static data
 */
static void     *megasas_state = NULL;
static int      debug_level_g = CL_ANN;

#pragma weak scsi_hba_open
#pragma weak scsi_hba_close
#pragma weak scsi_hba_ioctl

static ddi_dma_attr_t megasas_generic_dma_attr = {
        DMA_ATTR_V0,            /* dma_attr_version */
        0,                      /* low DMA address range */
        0xFFFFFFFFU,            /* high DMA address range */
        0xFFFFFFFFU,            /* DMA counter register  */
        8,                      /* DMA address alignment */
        0x07,                   /* DMA burstsizes  */
        1,                      /* min DMA size */
        0xFFFFFFFFU,            /* max DMA size */
        0xFFFFFFFFU,            /* segment boundary */
        MEGASAS_MAX_SGE_CNT,    /* dma_attr_sglen */
        512,                    /* granularity of device */
        0                       /* bus specific DMA flags */
};

int32_t megasas_max_cap_maxxfer = 0x1000000;

/*
 * cb_ops contains base level routines
 */
static struct cb_ops megasas_cb_ops = {
        megasas_open,           /* open */
        megasas_close,          /* close */
        nodev,                  /* strategy */
        nodev,                  /* print */
        nodev,                  /* dump */
        nodev,                  /* read */
        nodev,                  /* write */
        megasas_ioctl,          /* ioctl */
        nodev,                  /* devmap */
        nodev,                  /* mmap */
        nodev,                  /* segmap */
        nochpoll,               /* poll */
        nodev,                  /* cb_prop_op */
        0,                      /* streamtab  */
        D_NEW | D_HOTPLUG,      /* cb_flag */
        CB_REV,                 /* cb_rev */
        nodev,                  /* cb_aread */
        nodev                   /* cb_awrite */
};

/*
 * dev_ops contains configuration routines
 */
static struct dev_ops megasas_ops = {
        DEVO_REV,               /* rev, */
        0,                      /* refcnt */
        megasas_getinfo,        /* getinfo */
        nulldev,                /* identify */
        nulldev,                /* probe */
        megasas_attach,         /* attach */
        megasas_detach,         /* detach */
        megasas_reset,          /* reset */
        &megasas_cb_ops,        /* char/block ops */
        NULL,                   /* bus ops */
        NULL,                   /* power */
        ddi_quiesce_not_supported,      /* devo_quiesce */
};

static struct modldrv modldrv = {
        &mod_driverops,         /* module type - driver */
        MEGASAS_VERSION,
        &megasas_ops,           /* driver ops */
};

static struct modlinkage modlinkage = {
        MODREV_1,       /* ml_rev - must be MODREV_1 */
        &modldrv,       /* ml_linkage */
        NULL            /* end of driver linkage */
};

static struct ddi_device_acc_attr endian_attr = {
        DDI_DEVICE_ATTR_V1,
        DDI_STRUCTURE_LE_ACC,
        DDI_STRICTORDER_ACC,
        DDI_DEFAULT_ACC
};


/*
 * ************************************************************************** *
 *                                                                            *
 *         common entry points - for loadable kernel modules                  *
 *                                                                            *
 * ************************************************************************** *
 */

/*
 * _init - initialize a loadable module
 * @void
 *
 * The driver should perform any one-time resource allocation or data
 * initialization during driver loading in _init(). For example, the driver
 * should initialize any mutexes global to the driver in this routine.
 * The driver should not, however, use _init() to allocate or initialize
 * anything that has to do with a particular instance of the device.
 * Per-instance initialization must be done in attach().
 */
int
_init(void)
{
        int ret;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        ret = ddi_soft_state_init(&megasas_state,
            sizeof (struct megasas_instance), 0);

        if (ret != 0) {
                con_log(CL_ANN, (CE_WARN, "megaraid: could not init state"));
                return (ret);
        }

        if ((ret = scsi_hba_init(&modlinkage)) != 0) {
                con_log(CL_ANN, (CE_WARN, "megaraid: could not init scsi hba"));
                ddi_soft_state_fini(&megasas_state);
                return (ret);
        }

        ret = mod_install(&modlinkage);

        if (ret != 0) {
                con_log(CL_ANN, (CE_WARN, "megaraid: mod_install failed"));
                scsi_hba_fini(&modlinkage);
                ddi_soft_state_fini(&megasas_state);
        }

        return (ret);
}

/*
 * _info - returns information about a loadable module.
 * @void
 *
 * _info() is called to return module information. This is a typical entry
 * point that does predefined role. It simply calls mod_info().
 */
int
_info(struct modinfo *modinfop)
{
        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        return (mod_info(&modlinkage, modinfop));
}

/*
 * _fini - prepare a loadable module for unloading
 * @void
 *
 * In _fini(), the driver should release any resources that were allocated in
 * _init(). The driver must remove itself from the system module list.
 */
int
_fini(void)
{
        int ret;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        if ((ret = mod_remove(&modlinkage)) != 0)
                return (ret);

        scsi_hba_fini(&modlinkage);

        ddi_soft_state_fini(&megasas_state);

        return (ret);
}


/*
 * ************************************************************************** *
 *                                                                            *
 *               common entry points - for autoconfiguration                  *
 *                                                                            *
 * ************************************************************************** *
 */
/*
 * attach - adds a device to the system as part of initialization
 * @dip:
 * @cmd:
 *
 * The kernel calls a driver's attach() entry point to attach an instance of
 * a device (for MegaRAID, it is instance of a controller) or to resume
 * operation for an instance of a device that has been suspended or has been
 * shut down by the power management framework
 * The attach() entry point typically includes the following types of
 * processing:
 * - allocate a soft-state structure for the device instance (for MegaRAID,
 *   controller instance)
 * - initialize per-instance mutexes
 * - initialize condition variables
 * - register the device's interrupts (for MegaRAID, controller's interrupts)
 * - map the registers and memory of the device instance (for MegaRAID,
 *   controller instance)
 * - create minor device nodes for the device instance (for MegaRAID,
 *   controller instance)
 * - report that the device instance (for MegaRAID, controller instance) has
 *   attached
 */
static int
megasas_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
        int             instance_no;
        int             nregs;
        uint8_t         added_isr_f = 0;
        uint8_t         added_soft_isr_f = 0;
        uint8_t         create_devctl_node_f = 0;
        uint8_t         create_scsi_node_f = 0;
        uint8_t         create_ioc_node_f = 0;
        uint8_t         tran_alloc_f = 0;
        uint8_t         irq;
        uint16_t        vendor_id;
        uint16_t        device_id;
        uint16_t        subsysvid;
        uint16_t        subsysid;
        uint16_t        command;

        scsi_hba_tran_t         *tran;
        ddi_dma_attr_t  tran_dma_attr;
        struct megasas_instance *instance;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        /* CONSTCOND */
        ASSERT(NO_COMPETING_THREADS);

        instance_no = ddi_get_instance(dip);

        /*
         * Since we know that some instantiations of this device can be
         * plugged into slave-only SBus slots, check to see whether this is
         * one such.
         */
        if (ddi_slaveonly(dip) == DDI_SUCCESS) {
                con_log(CL_ANN, (CE_WARN,
                    "mega%d: Device in slave-only slot, unused", instance_no));
                return (DDI_FAILURE);
        }

        switch (cmd) {
                case DDI_ATTACH:
                        con_log(CL_DLEVEL1, (CE_NOTE, "megasas: DDI_ATTACH"));
                        /* allocate the soft state for the instance */
                        if (ddi_soft_state_zalloc(megasas_state, instance_no)
                            != DDI_SUCCESS) {
                                con_log(CL_ANN, (CE_WARN,
                                    "mega%d: Failed to allocate soft state",
                                    instance_no));

                                return (DDI_FAILURE);
                        }

                        instance = (struct megasas_instance *)ddi_get_soft_state
                            (megasas_state, instance_no);

                        if (instance == NULL) {
                                con_log(CL_ANN, (CE_WARN,
                                    "mega%d: Bad soft state", instance_no));

                                ddi_soft_state_free(megasas_state, instance_no);

                                return (DDI_FAILURE);
                        }

                        bzero((caddr_t)instance,
                            sizeof (struct megasas_instance));

                        instance->func_ptr = kmem_zalloc(
                            sizeof (struct megasas_func_ptr), KM_SLEEP);
                        ASSERT(instance->func_ptr);

                        /* Setup the PCI configuration space handles */
                        if (pci_config_setup(dip, &instance->pci_handle) !=
                            DDI_SUCCESS) {
                                con_log(CL_ANN, (CE_WARN,
                                    "mega%d: pci config setup failed ",
                                    instance_no));

                                kmem_free(instance->func_ptr,
                                    sizeof (struct megasas_func_ptr));
                                ddi_soft_state_free(megasas_state, instance_no);

                                return (DDI_FAILURE);
                        }

                        if (ddi_dev_nregs(dip, &nregs) != DDI_SUCCESS) {
                                con_log(CL_ANN, (CE_WARN,
                                    "megaraid: failed to get registers."));

                                pci_config_teardown(&instance->pci_handle);
                                kmem_free(instance->func_ptr,
                                    sizeof (struct megasas_func_ptr));
                                ddi_soft_state_free(megasas_state, instance_no);

                                return (DDI_FAILURE);
                        }

                        vendor_id = pci_config_get16(instance->pci_handle,
                            PCI_CONF_VENID);
                        device_id = pci_config_get16(instance->pci_handle,
                            PCI_CONF_DEVID);

                        subsysvid = pci_config_get16(instance->pci_handle,
                            PCI_CONF_SUBVENID);
                        subsysid = pci_config_get16(instance->pci_handle,
                            PCI_CONF_SUBSYSID);

                        pci_config_put16(instance->pci_handle, PCI_CONF_COMM,
                            (pci_config_get16(instance->pci_handle,
                            PCI_CONF_COMM) | PCI_COMM_ME));
                        irq = pci_config_get8(instance->pci_handle,
                            PCI_CONF_ILINE);

                        con_log(CL_DLEVEL1, (CE_CONT, "megasas%d: "
                            "0x%x:0x%x 0x%x:0x%x, irq:%d drv-ver:%s\n",
                            instance_no, vendor_id, device_id, subsysvid,
                            subsysid, irq, MEGASAS_VERSION));

                        /* enable bus-mastering */
                        command = pci_config_get16(instance->pci_handle,
                            PCI_CONF_COMM);

                        if (!(command & PCI_COMM_ME)) {
                                command |= PCI_COMM_ME;

                                pci_config_put16(instance->pci_handle,
                                    PCI_CONF_COMM, command);

                                con_log(CL_ANN, (CE_CONT, "megaraid%d: "
                                    "enable bus-mastering\n", instance_no));
                        } else {
                                con_log(CL_DLEVEL1, (CE_CONT, "megaraid%d: "
                                "bus-mastering already set\n", instance_no));
                        }

                        /* initialize function pointers */
                        if ((device_id == PCI_DEVICE_ID_LSI_1078) ||
                            (device_id == PCI_DEVICE_ID_LSI_1078DE)) {
                                con_log(CL_DLEVEL1, (CE_CONT, "megasas%d: "
                                    "1078R/DE detected\n", instance_no));
                                instance->func_ptr->read_fw_status_reg =
                                    read_fw_status_reg_ppc;
                                instance->func_ptr->issue_cmd = issue_cmd_ppc;
                                instance->func_ptr->issue_cmd_in_sync_mode =
                                    issue_cmd_in_sync_mode_ppc;
                                instance->func_ptr->issue_cmd_in_poll_mode =
                                    issue_cmd_in_poll_mode_ppc;
                                instance->func_ptr->enable_intr =
                                    enable_intr_ppc;
                                instance->func_ptr->disable_intr =
                                    disable_intr_ppc;
                                instance->func_ptr->intr_ack = intr_ack_ppc;
                        } else {
                                con_log(CL_DLEVEL1, (CE_CONT, "megasas%d: "
                                    "1064/8R detected\n", instance_no));
                                instance->func_ptr->read_fw_status_reg =
                                    read_fw_status_reg_xscale;
                                instance->func_ptr->issue_cmd =
                                    issue_cmd_xscale;
                                instance->func_ptr->issue_cmd_in_sync_mode =
                                    issue_cmd_in_sync_mode_xscale;
                                instance->func_ptr->issue_cmd_in_poll_mode =
                                    issue_cmd_in_poll_mode_xscale;
                                instance->func_ptr->enable_intr =
                                    enable_intr_xscale;
                                instance->func_ptr->disable_intr =
                                    disable_intr_xscale;
                                instance->func_ptr->intr_ack =
                                    intr_ack_xscale;
                        }

                        instance->baseaddress = pci_config_get32(
                            instance->pci_handle, PCI_CONF_BASE0);
                        instance->baseaddress &= 0x0fffc;

                        instance->dip           = dip;
                        instance->vendor_id     = vendor_id;
                        instance->device_id     = device_id;
                        instance->subsysvid     = subsysvid;
                        instance->subsysid      = subsysid;

                        /* Initialize FMA */
                        instance->fm_capabilities = ddi_prop_get_int(
                            DDI_DEV_T_ANY, instance->dip, DDI_PROP_DONTPASS,
                            "fm-capable", DDI_FM_EREPORT_CAPABLE |
                            DDI_FM_ACCCHK_CAPABLE | DDI_FM_DMACHK_CAPABLE
                            | DDI_FM_ERRCB_CAPABLE);

                        megasas_fm_init(instance);

                        /* setup the mfi based low level driver */
                        if (init_mfi(instance) != DDI_SUCCESS) {
                                con_log(CL_ANN, (CE_WARN, "megaraid: "
                                "could not initialize the low level driver"));

                                goto fail_attach;
                        }

                        /*
                         * Allocate the interrupt blocking cookie.
                         * It represents the information the framework
                         * needs to block interrupts. This cookie will
                         * be used by the locks shared accross our ISR.
                         * These locks must be initialized before we
                         * register our ISR.
                         * ddi_add_intr(9F)
                         */
                        if (ddi_get_iblock_cookie(dip, 0,
                            &instance->iblock_cookie) != DDI_SUCCESS) {

                                goto fail_attach;
                        }

                        if (ddi_get_soft_iblock_cookie(dip, DDI_SOFTINT_HIGH,
                            &instance->soft_iblock_cookie) != DDI_SUCCESS) {

                                goto fail_attach;
                        }

                        /*
                         * Initialize the driver mutexes common to
                         * normal/high level isr
                         */
                        if (ddi_intr_hilevel(dip, 0)) {
                                instance->isr_level = HIGH_LEVEL_INTR;
                                mutex_init(&instance->cmd_pool_mtx,
                                    "cmd_pool_mtx", MUTEX_DRIVER,
                                    instance->soft_iblock_cookie);
                                mutex_init(&instance->cmd_pend_mtx,
                                    "cmd_pend_mtx", MUTEX_DRIVER,
                                    instance->soft_iblock_cookie);
                        } else {
                                /*
                                 * Initialize the driver mutexes
                                 * specific to soft-isr
                                 */
                                instance->isr_level = NORMAL_LEVEL_INTR;
                                mutex_init(&instance->cmd_pool_mtx,
                                    "cmd_pool_mtx", MUTEX_DRIVER,
                                    instance->iblock_cookie);
                                mutex_init(&instance->cmd_pend_mtx,
                                    "cmd_pend_mtx", MUTEX_DRIVER,
                                    instance->iblock_cookie);
                        }

                        mutex_init(&instance->completed_pool_mtx,
                            "completed_pool_mtx", MUTEX_DRIVER,
                            instance->iblock_cookie);
                        mutex_init(&instance->int_cmd_mtx, "int_cmd_mtx",
                            MUTEX_DRIVER, instance->iblock_cookie);
                        mutex_init(&instance->aen_cmd_mtx, "aen_cmd_mtx",
                            MUTEX_DRIVER, instance->iblock_cookie);
                        mutex_init(&instance->abort_cmd_mtx, "abort_cmd_mtx",
                            MUTEX_DRIVER, instance->iblock_cookie);

                        cv_init(&instance->int_cmd_cv, NULL, CV_DRIVER, NULL);
                        cv_init(&instance->abort_cmd_cv, NULL, CV_DRIVER, NULL);

                        INIT_LIST_HEAD(&instance->completed_pool_list);

                        /* Register our isr. */
                        if (ddi_add_intr(dip, 0, NULL, NULL, megasas_isr,
                            (caddr_t)instance) != DDI_SUCCESS) {
                                con_log(CL_ANN, (CE_WARN,
                                    " ISR did not register"));

                                goto fail_attach;
                        }

                        added_isr_f = 1;

                        /* Register our soft-isr for highlevel interrupts. */
                        if (instance->isr_level == HIGH_LEVEL_INTR) {
                                if (ddi_add_softintr(dip, DDI_SOFTINT_HIGH,
                                    &instance->soft_intr_id, NULL, NULL,
                                    megasas_softintr, (caddr_t)instance) !=
                                    DDI_SUCCESS) {
                                        con_log(CL_ANN, (CE_WARN,
                                            " Software ISR did not register"));

                                        goto fail_attach;
                                }

                                added_soft_isr_f = 1;
                        }

                        /* Allocate a transport structure */
                        tran = scsi_hba_tran_alloc(dip, SCSI_HBA_CANSLEEP);

                        if (tran == NULL) {
                                con_log(CL_ANN, (CE_WARN,
                                    "scsi_hba_tran_alloc failed"));
                                goto fail_attach;
                        }

                        tran_alloc_f = 1;

                        instance->tran = tran;

                        tran->tran_hba_private  = instance;
                        tran->tran_tgt_private  = NULL;
                        tran->tran_tgt_init     = megasas_tran_tgt_init;
                        tran->tran_tgt_probe    = scsi_hba_probe;
                        tran->tran_tgt_free     = (void (*)())NULL;
                        tran->tran_init_pkt     = megasas_tran_init_pkt;
                        tran->tran_start        = megasas_tran_start;
                        tran->tran_abort        = megasas_tran_abort;
                        tran->tran_reset        = megasas_tran_reset;
                        tran->tran_bus_reset    = megasas_tran_bus_reset;
                        tran->tran_getcap       = megasas_tran_getcap;
                        tran->tran_setcap       = megasas_tran_setcap;
                        tran->tran_destroy_pkt  = megasas_tran_destroy_pkt;
                        tran->tran_dmafree      = megasas_tran_dmafree;
                        tran->tran_sync_pkt     = megasas_tran_sync_pkt;
                        tran->tran_reset_notify = NULL;
                        tran->tran_quiesce      = megasas_tran_quiesce;
                        tran->tran_unquiesce    = megasas_tran_unquiesce;

                        tran_dma_attr = megasas_generic_dma_attr;
                        tran_dma_attr.dma_attr_sgllen = instance->max_num_sge;

                        /* Attach this instance of the hba */
                        if (scsi_hba_attach_setup(dip, &tran_dma_attr, tran, 0)
                            != DDI_SUCCESS) {
                                con_log(CL_ANN, (CE_WARN,
                                    "scsi_hba_attach failed\n"));

                                goto fail_attach;
                        }

                        /* create devctl node for cfgadm command */
                        if (ddi_create_minor_node(dip, "devctl",
                            S_IFCHR, INST2DEVCTL(instance_no),
                            DDI_NT_SCSI_NEXUS, 0) == DDI_FAILURE) {
                                con_log(CL_ANN, (CE_WARN,
                                    "megaraid: failed to create devctl node."));

                                goto fail_attach;
                        }

                        create_devctl_node_f = 1;

                        /* create scsi node for cfgadm command */
                        if (ddi_create_minor_node(dip, "scsi", S_IFCHR,
                            INST2SCSI(instance_no),
                            DDI_NT_SCSI_ATTACHMENT_POINT, 0) ==
                            DDI_FAILURE) {
                                con_log(CL_ANN, (CE_WARN,
                                    "megaraid: failed to create scsi node."));

                                goto fail_attach;
                        }

                        create_scsi_node_f = 1;

                        (void) sprintf(instance->iocnode, "%d:lsirdctl",
                            instance_no);

                        /*
                         * Create a node for applications
                         * for issuing ioctl to the driver.
                         */
                        if (ddi_create_minor_node(dip, instance->iocnode,
                            S_IFCHR, INST2LSIRDCTL(instance_no),
                            DDI_PSEUDO, 0) == DDI_FAILURE) {
                                con_log(CL_ANN, (CE_WARN,
                                    "megaraid: failed to create ioctl node."));

                                goto fail_attach;
                        }

                        create_ioc_node_f = 1;

                        /* enable interrupt */
                        instance->func_ptr->enable_intr(instance);

                        /* initiate AEN */
                        if (start_mfi_aen(instance)) {
                                con_log(CL_ANN, (CE_WARN,
                                    "megaraid: failed to initiate AEN."));
                                goto fail_initiate_aen;
                        }

                        con_log(CL_DLEVEL1, (CE_NOTE,
                            "AEN started for instance %d.", instance_no));

                        /* Finally! We are on the air.  */
                        ddi_report_dev(dip);

                        if (megasas_check_acc_handle(instance->regmap_handle) !=
                            DDI_SUCCESS) {
                                goto fail_attach;
                        }
                        if (megasas_check_acc_handle(instance->pci_handle) !=
                            DDI_SUCCESS) {
                                goto fail_attach;
                        }
                        break;
                case DDI_PM_RESUME:
                        con_log(CL_ANN, (CE_NOTE,
                            "megasas: DDI_PM_RESUME"));
                        break;
                case DDI_RESUME:
                        con_log(CL_ANN, (CE_NOTE,
                            "megasas: DDI_RESUME"));
                        break;
                default:
                        con_log(CL_ANN, (CE_WARN,
                            "megasas: invalid attach cmd=%x", cmd));
                        return (DDI_FAILURE);
        }

        return (DDI_SUCCESS);

fail_initiate_aen:
fail_attach:
        if (create_devctl_node_f) {
                ddi_remove_minor_node(dip, "devctl");
        }

        if (create_scsi_node_f) {
                ddi_remove_minor_node(dip, "scsi");
        }

        if (create_ioc_node_f) {
                ddi_remove_minor_node(dip, instance->iocnode);
        }

        if (tran_alloc_f) {
                scsi_hba_tran_free(tran);
        }


        if (added_soft_isr_f) {
                ddi_remove_softintr(instance->soft_intr_id);
        }

        if (added_isr_f) {
                ddi_remove_intr(dip, 0, instance->iblock_cookie);
        }

        megasas_fm_ereport(instance, DDI_FM_DEVICE_NO_RESPONSE);
        ddi_fm_service_impact(instance->dip, DDI_SERVICE_LOST);

        megasas_fm_fini(instance);

        pci_config_teardown(&instance->pci_handle);

        ddi_soft_state_free(megasas_state, instance_no);

        con_log(CL_ANN, (CE_NOTE,
            "megasas: return failure from mega_attach\n"));

        return (DDI_FAILURE);
}

/*
 * getinfo - gets device information
 * @dip:
 * @cmd:
 * @arg:
 * @resultp:
 *
 * The system calls getinfo() to obtain configuration information that only
 * the driver knows. The mapping of minor numbers to device instance is
 * entirely under the control of the driver. The system sometimes needs to ask
 * the driver which device a particular dev_t represents.
 * Given the device number return the devinfo pointer from the scsi_device
 * structure.
 */
/*ARGSUSED*/
static int
megasas_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd,  void *arg, void **resultp)
{
        int     rval;
        int     megasas_minor = getminor((dev_t)arg);

        struct megasas_instance *instance;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        switch (cmd) {
                case DDI_INFO_DEVT2DEVINFO:
                        instance = (struct megasas_instance *)
                            ddi_get_soft_state(megasas_state,
                            MINOR2INST(megasas_minor));

                        if (instance == NULL) {
                                *resultp = NULL;
                                rval = DDI_FAILURE;
                        } else {
                                *resultp = instance->dip;
                                rval = DDI_SUCCESS;
                        }
                        break;
                case DDI_INFO_DEVT2INSTANCE:
                        *resultp = (void *)instance;
                        rval = DDI_SUCCESS;
                        break;
                default:
                        *resultp = NULL;
                        rval = DDI_FAILURE;
        }

        return (rval);
}

/*
 * detach - detaches a device from the system
 * @dip: pointer to the device's dev_info structure
 * @cmd: type of detach
 *
 * A driver's detach() entry point is called to detach an instance of a device
 * that is bound to the driver. The entry point is called with the instance of
 * the device node to be detached and with DDI_DETACH, which is specified as
 * the cmd argument to the entry point.
 * This routine is called during driver unload. We free all the allocated
 * resources and call the corresponding LLD so that it can also release all
 * its resources.
 */
static int
megasas_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
{
        int     instance_no;

        struct megasas_instance *instance;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        /* CONSTCOND */
        ASSERT(NO_COMPETING_THREADS);

        instance_no = ddi_get_instance(dip);

        instance = (struct megasas_instance *)ddi_get_soft_state(megasas_state,
            instance_no);

        if (!instance) {
                con_log(CL_ANN, (CE_WARN,
                    "megasas:%d could not get instance in detach",
                    instance_no));

                return (DDI_FAILURE);
        }

        con_log(CL_ANN, (CE_NOTE,
            "megasas%d: detaching device 0x%4x:0x%4x:0x%4x:0x%4x\n",
            instance_no, instance->vendor_id, instance->device_id,
            instance->subsysvid, instance->subsysid));

        switch (cmd) {
                case DDI_DETACH:
                        con_log(CL_ANN, (CE_NOTE,
                            "megasas_detach: DDI_DETACH\n"));

                        if (scsi_hba_detach(dip) != DDI_SUCCESS) {
                                con_log(CL_ANN, (CE_WARN,
                                    "megasas:%d failed to detach",
                                    instance_no));

                                return (DDI_FAILURE);
                        }

                        scsi_hba_tran_free(instance->tran);

                        if (abort_aen_cmd(instance, instance->aen_cmd)) {
                                con_log(CL_ANN, (CE_WARN, "megasas_detach: "
                                    "failed to abort prevous AEN command\n"));

                                return (DDI_FAILURE);
                        }

                        instance->func_ptr->disable_intr(instance);

                        if (instance->isr_level == HIGH_LEVEL_INTR) {
                                ddi_remove_softintr(instance->soft_intr_id);
                        }

                        ddi_remove_intr(dip, 0, instance->iblock_cookie);

                        free_space_for_mfi(instance);

                        megasas_fm_fini(instance);

                        pci_config_teardown(&instance->pci_handle);

                        kmem_free(instance->func_ptr,
                            sizeof (struct megasas_func_ptr));

                        ddi_soft_state_free(megasas_state, instance_no);
                        break;
                case DDI_PM_SUSPEND:
                        con_log(CL_ANN, (CE_NOTE,
                            "megasas_detach: DDI_PM_SUSPEND\n"));

                        break;
                case DDI_SUSPEND:
                        con_log(CL_ANN, (CE_NOTE,
                            "megasas_detach: DDI_SUSPEND\n"));

                        break;
                default:
                        con_log(CL_ANN, (CE_WARN,
                            "invalid detach command:0x%x", cmd));
                        return (DDI_FAILURE);
        }

        return (DDI_SUCCESS);
}

/*
 * ************************************************************************** *
 *                                                                            *
 *             common entry points - for character driver types               *
 *                                                                            *
 * ************************************************************************** *
 */
/*
 * open - gets access to a device
 * @dev:
 * @openflags:
 * @otyp:
 * @credp:
 *
 * Access to a device by one or more application programs is controlled
 * through the open() and close() entry points. The primary function of
 * open() is to verify that the open request is allowed.
 */
static  int
megasas_open(dev_t *dev, int openflags, int otyp, cred_t *credp)
{
        int     rval = 0;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        /* Check root permissions */
        if (drv_priv(credp) != 0) {
                con_log(CL_ANN, (CE_WARN,
                    "megaraid: Non-root ioctl access tried!"));
                return (EPERM);
        }

        /* Verify we are being opened as a character device */
        if (otyp != OTYP_CHR) {
                con_log(CL_ANN, (CE_WARN,
                    "megaraid: ioctl node must be a char node\n"));
                return (EINVAL);
        }

        if (ddi_get_soft_state(megasas_state, MINOR2INST(getminor(*dev)))
            == NULL) {
                return (ENXIO);
        }

        if (scsi_hba_open) {
                rval = scsi_hba_open(dev, openflags, otyp, credp);
        }

        return (rval);
}

/*
 * close - gives up access to a device
 * @dev:
 * @openflags:
 * @otyp:
 * @credp:
 *
 * close() should perform any cleanup necessary to finish using the minor
 * device, and prepare the device (and driver) to be opened again.
 */
static  int
megasas_close(dev_t dev, int openflags, int otyp, cred_t *credp)
{
        int     rval = 0;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        /* no need for locks! */

        if (scsi_hba_close) {
                rval = scsi_hba_close(dev, openflags, otyp, credp);
        }

        return (rval);
}

/*
 * ioctl - performs a range of I/O commands for character drivers
 * @dev:
 * @cmd:
 * @arg:
 * @mode:
 * @credp:
 * @rvalp:
 *
 * ioctl() routine must make sure that user data is copied into or out of the
 * kernel address space explicitly using copyin(), copyout(), ddi_copyin(),
 * and ddi_copyout(), as appropriate.
 * This is a wrapper routine to serialize access to the actual ioctl routine.
 * ioctl() should return 0 on success, or the appropriate error number. The
 * driver may also set the value returned to the calling process through rvalp.
 */
static int
megasas_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp,
    int *rvalp)
{
        int     rval = 0;

        struct megasas_instance *instance;
        struct megasas_ioctl    ioctl;
        struct megasas_aen      aen;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        instance = ddi_get_soft_state(megasas_state, MINOR2INST(getminor(dev)));

        if (instance == NULL) {
                /* invalid minor number */
                con_log(CL_ANN, (CE_WARN, "megaraid: adapter not found."));
                return (ENXIO);
        }

        switch ((uint_t)cmd) {
                case MEGASAS_IOCTL_FIRMWARE:
                        if (ddi_copyin((void *) arg, &ioctl,
                            sizeof (struct megasas_ioctl), mode)) {
                                con_log(CL_ANN, (CE_WARN, "megasas_ioctl: "
                                    "ERROR IOCTL copyin"));
                                return (EFAULT);
                        }

                        if (ioctl.control_code == MR_DRIVER_IOCTL_COMMON) {
                                rval = handle_drv_ioctl(instance, &ioctl, mode);
                        } else {
                                rval = handle_mfi_ioctl(instance, &ioctl, mode);
                        }

                        if (ddi_copyout((void *) &ioctl, (void *)arg,
                            (sizeof (struct megasas_ioctl) - 1), mode)) {
                                con_log(CL_ANN, (CE_WARN,
                                    "megasas_ioctl: copy_to_user failed\n"));
                                rval = 1;
                        }

                        break;
                case MEGASAS_IOCTL_AEN:
                        if (ddi_copyin((void *) arg, &aen,
                            sizeof (struct megasas_aen), mode)) {
                                con_log(CL_ANN, (CE_WARN,
                                    "megasas_ioctl: ERROR AEN copyin"));
                                return (EFAULT);
                        }

                        rval = handle_mfi_aen(instance, &aen);

                        if (ddi_copyout((void *) &aen, (void *)arg,
                            sizeof (struct megasas_aen), mode)) {
                                con_log(CL_ANN, (CE_WARN,
                                    "megasas_ioctl: copy_to_user failed\n"));
                                rval = 1;
                        }

                        break;
                default:
                        rval = scsi_hba_ioctl(dev, cmd, arg,
                            mode, credp, rvalp);

                        con_log(CL_DLEVEL1, (CE_NOTE, "megasas_ioctl: "
                            "scsi_hba_ioctl called, ret = %x.", rval));
        }

        return (rval);
}

/*
 * ************************************************************************** *
 *                                                                            *
 *               common entry points - for block driver types                 *
 *                                                                            *
 * ************************************************************************** *
 */
/*
 * reset - TBD
 * @dip:
 * @cmd:
 *
 * TBD
 */
/*ARGSUSED*/
static int
megasas_reset(dev_info_t *dip, ddi_reset_cmd_t cmd)
{
        int     instance_no;

        struct megasas_instance *instance;

        instance_no = ddi_get_instance(dip);
        instance = (struct megasas_instance *)ddi_get_soft_state
            (megasas_state, instance_no);

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        if (!instance) {
                con_log(CL_ANN, (CE_WARN,
                    "megaraid:%d could not get adapter in reset",
                    instance_no));
                return (DDI_FAILURE);
        }

        con_log(CL_ANN, (CE_NOTE, "flushing cache for instance %d ..",
            instance_no));

        flush_cache(instance);

        return (DDI_SUCCESS);
}


/*
 * ************************************************************************** *
 *                                                                            *
 *                          entry points (SCSI HBA)                           *
 *                                                                            *
 * ************************************************************************** *
 */
/*
 * tran_tgt_init - initialize a target device instance
 * @hba_dip:
 * @tgt_dip:
 * @tran:
 * @sd:
 *
 * The tran_tgt_init() entry point enables the HBA to allocate and initialize
 * any per-target resources. tran_tgt_init() also enables the HBA to qualify
 * the device's address as valid and supportable for that particular HBA.
 * By returning DDI_FAILURE, the instance of the target driver for that device
 * is not probed or attached.
 */
/*ARGSUSED*/
static int
megasas_tran_tgt_init(dev_info_t *hba_dip, dev_info_t *tgt_dip,
    scsi_hba_tran_t *tran, struct scsi_device *sd)
{
        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        return (DDI_SUCCESS);
}

/*
 * tran_init_pkt - allocate & initialize a scsi_pkt structure
 * @ap:
 * @pkt:
 * @bp:
 * @cmdlen:
 * @statuslen:
 * @tgtlen:
 * @flags:
 * @callback:
 *
 * The tran_init_pkt() entry point allocates and initializes a scsi_pkt
 * structure and DMA resources for a target driver request. The
 * tran_init_pkt() entry point is called when the target driver calls the
 * SCSA function scsi_init_pkt(). Each call of the tran_init_pkt() entry point
 * is a request to perform one or more of three possible services:
 *  - allocation and initialization of a scsi_pkt structure
 *  - allocation of DMA resources for data transfer
 *  - reallocation of DMA resources for the next portion of the data transfer
 */
static struct scsi_pkt *
megasas_tran_init_pkt(struct scsi_address *ap, register struct scsi_pkt *pkt,
    struct buf *bp, int cmdlen, int statuslen, int tgtlen,
    int flags, int (*callback)(), caddr_t arg)
{
        struct scsa_cmd *acmd;
        struct megasas_instance *instance;
        struct scsi_pkt *new_pkt;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        instance = ADDR2MEGA(ap);

        /* step #1 : pkt allocation */
        if (pkt == NULL) {
                pkt = scsi_hba_pkt_alloc(instance->dip, ap, cmdlen, statuslen,
                    tgtlen, sizeof (struct scsa_cmd), callback, arg);
                if (pkt == NULL) {
                        return (NULL);
                }

                acmd = PKT2CMD(pkt);

                /*
                 * Initialize the new pkt - we redundantly initialize
                 * all the fields for illustrative purposes.
                 */
                acmd->cmd_pkt           = pkt;
                acmd->cmd_flags         = 0;
                acmd->cmd_scblen        = statuslen;
                acmd->cmd_cdblen        = cmdlen;
                acmd->cmd_dmahandle     = NULL;
                acmd->cmd_ncookies      = 0;
                acmd->cmd_cookie        = 0;
                acmd->cmd_cookiecnt     = 0;
                acmd->cmd_nwin          = 0;

                pkt->pkt_address        = *ap;
                pkt->pkt_comp           = (void (*)())NULL;
                pkt->pkt_flags          = 0;
                pkt->pkt_time           = 0;
                pkt->pkt_resid          = 0;
                pkt->pkt_state          = 0;
                pkt->pkt_statistics     = 0;
                pkt->pkt_reason         = 0;
                new_pkt                 = pkt;
        } else {
                acmd = PKT2CMD(pkt);
                new_pkt = NULL;
        }

        /* step #2 : dma allocation/move */
        if (bp && bp->b_bcount != 0) {
                if (acmd->cmd_dmahandle == NULL) {
                        if (megasas_dma_alloc(instance, pkt, bp, flags,
                            callback) == -1) {
                                if (new_pkt) {
                                        scsi_hba_pkt_free(ap, new_pkt);
                                }

                                return ((struct scsi_pkt *)NULL);
                        }
                } else {
                        if (megasas_dma_move(instance, pkt, bp) == -1) {
                                return ((struct scsi_pkt *)NULL);
                        }
                }
        }

        return (pkt);
}

/*
 * tran_start - transport a SCSI command to the addressed target
 * @ap:
 * @pkt:
 *
 * The tran_start() entry point for a SCSI HBA driver is called to transport a
 * SCSI command to the addressed target. The SCSI command is described
 * entirely within the scsi_pkt structure, which the target driver allocated
 * through the HBA driver's tran_init_pkt() entry point. If the command
 * involves a data transfer, DMA resources must also have been allocated for
 * the scsi_pkt structure.
 *
 * Return Values :
 *      TRAN_BUSY - request queue is full, no more free scbs
 *      TRAN_ACCEPT - pkt has been submitted to the instance
 */
static int
megasas_tran_start(struct scsi_address *ap, register struct scsi_pkt *pkt)
{
        uchar_t         cmd_done = 0;

        struct megasas_instance *instance = ADDR2MEGA(ap);
        struct megasas_cmd      *cmd;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d:SCSI CDB[0]=0x%x",
            __func__, __LINE__, pkt->pkt_cdbp[0]));

        pkt->pkt_reason = CMD_CMPLT;
        *pkt->pkt_scbp = STATUS_GOOD; /* clear arq scsi_status */

        cmd = build_cmd(instance, ap, pkt, &cmd_done);

        /*
         * Check if the command is already completed by the mega_build_cmd()
         * routine. In which case the busy_flag would be clear and scb will be
         * NULL and appropriate reason provided in pkt_reason field
         */
        if (cmd_done) {
                if ((pkt->pkt_flags & FLAG_NOINTR) == 0) {
                        scsi_hba_pkt_comp(pkt);
                }
                pkt->pkt_reason = CMD_CMPLT;
                pkt->pkt_scbp[0] = STATUS_GOOD;
                pkt->pkt_state |= STATE_GOT_BUS | STATE_GOT_TARGET
                    | STATE_SENT_CMD;
                return (TRAN_ACCEPT);
        }

        if (cmd == NULL) {
                return (TRAN_BUSY);
        }

        if ((pkt->pkt_flags & FLAG_NOINTR) == 0) {
                if (instance->fw_outstanding > instance->max_fw_cmds) {
                        con_log(CL_ANN, (CE_CONT, "megasas:Firmware busy"));
                        return_mfi_pkt(instance, cmd);
                        return (TRAN_BUSY);
                }

                /* Syncronize the Cmd frame for the controller */
                (void) ddi_dma_sync(cmd->frame_dma_obj.dma_handle, 0, 0,
                    DDI_DMA_SYNC_FORDEV);

                instance->func_ptr->issue_cmd(cmd, instance);

        } else {
                struct megasas_header *hdr = &cmd->frame->hdr;

                cmd->sync_cmd = MEGASAS_TRUE;

                instance->func_ptr-> issue_cmd_in_poll_mode(instance, cmd);

                pkt->pkt_reason         = CMD_CMPLT;
                pkt->pkt_statistics     = 0;
                pkt->pkt_state |= STATE_XFERRED_DATA | STATE_GOT_STATUS;

                switch (hdr->cmd_status) {
                case MFI_STAT_OK:
                        pkt->pkt_scbp[0] = STATUS_GOOD;
                        break;

                case MFI_STAT_SCSI_DONE_WITH_ERROR:

                        pkt->pkt_reason = CMD_CMPLT;
                        pkt->pkt_statistics = 0;

                        ((struct scsi_status *)pkt->pkt_scbp)->sts_chk = 1;
                        break;

                case MFI_STAT_DEVICE_NOT_FOUND:
                        pkt->pkt_reason         = CMD_DEV_GONE;
                        pkt->pkt_statistics     = STAT_DISCON;
                        break;

                default:
                        ((struct scsi_status *)pkt->pkt_scbp)->sts_busy = 1;
                }

                return_mfi_pkt(instance, cmd);
                (void) megasas_common_check(instance, cmd);

                scsi_hba_pkt_comp(pkt);

        }

        return (TRAN_ACCEPT);
}

/*
 * tran_abort - Abort any commands that are currently in transport
 * @ap:
 * @pkt:
 *
 * The tran_abort() entry point for a SCSI HBA driver is called to abort any
 * commands that are currently in transport for a particular target. This entry
 * point is called when a target driver calls scsi_abort(). The tran_abort()
 * entry point should attempt to abort the command denoted by the pkt
 * parameter. If the pkt parameter is NULL, tran_abort() should attempt to
 * abort all outstanding commands in the transport layer for the particular
 * target or logical unit.
 */
/*ARGSUSED*/
static int
megasas_tran_abort(struct scsi_address *ap, struct scsi_pkt *pkt)
{
        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        /* aborting command not supported by H/W */

        return (DDI_FAILURE);
}

/*
 * tran_reset - reset either the SCSI bus or target
 * @ap:
 * @level:
 *
 * The tran_reset() entry point for a SCSI HBA driver is called to reset either
 * the SCSI bus or a particular SCSI target device. This entry point is called
 * when a target driver calls scsi_reset(). The tran_reset() entry point must
 * reset the SCSI bus if level is RESET_ALL. If level is RESET_TARGET, just the
 * particular target or logical unit must be reset.
 */
/*ARGSUSED*/
static int
megasas_tran_reset(struct scsi_address *ap, int level)
{
        struct megasas_instance *instance = ADDR2MEGA(ap);

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        if (wait_for_outstanding(instance)) {
                return (DDI_FAILURE);
        } else {
                return (DDI_SUCCESS);
        }
}

/*
 * tran_bus_reset - reset the SCSI bus
 * @dip:
 * @level:
 *
 * The tran_bus_reset() vector in the scsi_hba_tran structure should be
 * initialized during the HBA driver's attach(). The vector should point to
 * an HBA entry point that is to be called when a user initiates a bus reset.
 * Implementation is hardware specific. If the HBA driver cannot reset the
 * SCSI bus without affecting the targets, the driver should fail RESET_BUS
 * or not initialize this vector.
 */
/*ARGSUSED*/
static int
megasas_tran_bus_reset(dev_info_t *dip, int level)
{
        int     instance_no = ddi_get_instance(dip);

        struct megasas_instance *instance = ddi_get_soft_state(megasas_state,
            instance_no);

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        if (wait_for_outstanding(instance)) {
                return (DDI_FAILURE);
        } else {
                return (DDI_SUCCESS);
        }
}

/*
 * tran_getcap - get one of a set of SCSA-defined capabilities
 * @ap:
 * @cap:
 * @whom:
 *
 * The target driver can request the current setting of the capability for a
 * particular target by setting the whom parameter to nonzero. A whom value of
 * zero indicates a request for the current setting of the general capability
 * for the SCSI bus or for adapter hardware. The tran_getcap() should return -1
 * for undefined capabilities or the current value of the requested capability.
 */
/*ARGSUSED*/
static int
megasas_tran_getcap(struct scsi_address *ap, char *cap, int whom)
{
        int     rval = 0;

        struct megasas_instance *instance = ADDR2MEGA(ap);

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        /* we do allow inquiring about capabilities for other targets */
        if (cap == NULL) {
                return (-1);
        }

        switch (scsi_hba_lookup_capstr(cap)) {
                case SCSI_CAP_DMA_MAX:
                        /* Limit to 16MB max transfer */
                        rval = megasas_max_cap_maxxfer;
                        break;
                case SCSI_CAP_MSG_OUT:
                        rval = 1;
                        break;
                case SCSI_CAP_DISCONNECT:
                        rval = 0;
                        break;
                case SCSI_CAP_SYNCHRONOUS:
                        rval = 0;
                        break;
                case SCSI_CAP_WIDE_XFER:
                        rval = 1;
                        break;
                case SCSI_CAP_TAGGED_QING:
                        rval = 1;
                        break;
                case SCSI_CAP_UNTAGGED_QING:
                        rval = 1;
                        break;
                case SCSI_CAP_PARITY:
                        rval = 1;
                        break;
                case SCSI_CAP_INITIATOR_ID:
                        rval = instance->init_id;
                        break;
                case SCSI_CAP_ARQ:
                        rval = 1;
                        break;
                case SCSI_CAP_LINKED_CMDS:
                        rval = 0;
                        break;
                case SCSI_CAP_RESET_NOTIFICATION:
                        rval = 1;
                        break;
                case SCSI_CAP_GEOMETRY:
                        rval = -1;

                        break;
                default:
                        con_log(CL_DLEVEL2, (CE_NOTE, "Default cap coming 0x%x",
                            scsi_hba_lookup_capstr(cap)));
                        rval = -1;
                        break;
        }

        return (rval);
}

/*
 * tran_setcap - set one of a set of SCSA-defined capabilities
 * @ap:
 * @cap:
 * @value:
 * @whom:
 *
 * The target driver might request that the new value be set for a particular
 * target by setting the whom parameter to nonzero. A whom value of zero
 * means that request is to set the new value for the SCSI bus or for adapter
 * hardware in general.
 * The tran_setcap() should return the following values as appropriate:
 * - -1 for undefined capabilities
 * - 0 if the HBA driver cannot set the capability to the requested value
 * - 1 if the HBA driver is able to set the capability to the requested value
 */
/*ARGSUSED*/
static int
megasas_tran_setcap(struct scsi_address *ap, char *cap, int value, int whom)
{
        int             rval = 1;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        /* We don't allow setting capabilities for other targets */
        if (cap == NULL || whom == 0) {
                return (-1);
        }

        switch (scsi_hba_lookup_capstr(cap)) {
                case SCSI_CAP_DMA_MAX:
                case SCSI_CAP_MSG_OUT:
                case SCSI_CAP_PARITY:
                case SCSI_CAP_LINKED_CMDS:
                case SCSI_CAP_RESET_NOTIFICATION:
                case SCSI_CAP_DISCONNECT:
                case SCSI_CAP_SYNCHRONOUS:
                case SCSI_CAP_UNTAGGED_QING:
                case SCSI_CAP_WIDE_XFER:
                case SCSI_CAP_INITIATOR_ID:
                case SCSI_CAP_ARQ:
                        /*
                         * None of these are settable via
                         * the capability interface.
                         */
                        break;
                case SCSI_CAP_TAGGED_QING:
                        rval = 1;
                        break;
                case SCSI_CAP_SECTOR_SIZE:
                        rval = 1;
                        break;

                case SCSI_CAP_TOTAL_SECTORS:
                        rval = 1;
                        break;
                default:
                        rval = -1;
                        break;
        }

        return (rval);
}

/*
 * tran_destroy_pkt - deallocate scsi_pkt structure
 * @ap:
 * @pkt:
 *
 * The tran_destroy_pkt() entry point is the HBA driver function that
 * deallocates scsi_pkt structures. The tran_destroy_pkt() entry point is
 * called when the target driver calls scsi_destroy_pkt(). The
 * tran_destroy_pkt() entry point must free any DMA resources that have been
 * allocated for the packet. An implicit DMA synchronization occurs if the
 * DMA resources are freed and any cached data remains after the completion
 * of the transfer.
 */
static void
megasas_tran_destroy_pkt(struct scsi_address *ap, struct scsi_pkt *pkt)
{
        struct scsa_cmd *acmd = PKT2CMD(pkt);

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        if (acmd->cmd_flags & CFLAG_DMAVALID) {
                acmd->cmd_flags &= ~CFLAG_DMAVALID;

                (void) ddi_dma_unbind_handle(acmd->cmd_dmahandle);

                ddi_dma_free_handle(&acmd->cmd_dmahandle);

                acmd->cmd_dmahandle = NULL;
        }

        /* free the pkt */
        scsi_hba_pkt_free(ap, pkt);
}

/*
 * tran_dmafree - deallocates DMA resources
 * @ap:
 * @pkt:
 *
 * The tran_dmafree() entry point deallocates DMAQ resources that have been
 * allocated for a scsi_pkt structure. The tran_dmafree() entry point is
 * called when the target driver calls scsi_dmafree(). The tran_dmafree() must
 * free only DMA resources allocated for a scsi_pkt structure, not the
 * scsi_pkt itself. When DMA resources are freed, a DMA synchronization is
 * implicitly performed.
 */
/*ARGSUSED*/
static void
megasas_tran_dmafree(struct scsi_address *ap, struct scsi_pkt *pkt)
{
        register struct scsa_cmd *acmd = PKT2CMD(pkt);

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        if (acmd->cmd_flags & CFLAG_DMAVALID) {
                acmd->cmd_flags &= ~CFLAG_DMAVALID;

                (void) ddi_dma_unbind_handle(acmd->cmd_dmahandle);

                ddi_dma_free_handle(&acmd->cmd_dmahandle);

                acmd->cmd_dmahandle = NULL;
        }
}

/*
 * tran_sync_pkt - synchronize the DMA object allocated
 * @ap:
 * @pkt:
 *
 * The tran_sync_pkt() entry point synchronizes the DMA object allocated for
 * the scsi_pkt structure before or after a DMA transfer. The tran_sync_pkt()
 * entry point is called when the target driver calls scsi_sync_pkt(). If the
 * data transfer direction is a DMA read from device to memory, tran_sync_pkt()
 * must synchronize the CPU's view of the data. If the data transfer direction
 * is a DMA write from memory to device, tran_sync_pkt() must synchronize the
 * device's view of the data.
 */
/*ARGSUSED*/
static void
megasas_tran_sync_pkt(struct scsi_address *ap, struct scsi_pkt *pkt)
{
        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        /*
         * following 'ddi_dma_sync()' API call
         * already called for each I/O in the ISR
         */
#if 0
        int     i;

        register struct scsa_cmd        *acmd = PKT2CMD(pkt);

        if (acmd->cmd_flags & CFLAG_DMAVALID) {
                (void) ddi_dma_sync(acmd->cmd_dmahandle, acmd->cmd_dma_offset,
                    acmd->cmd_dma_len, (acmd->cmd_flags & CFLAG_DMASEND) ?
                    DDI_DMA_SYNC_FORDEV : DDI_DMA_SYNC_FORCPU);
        }
#endif
}

/*ARGSUSED*/
static int
megasas_tran_quiesce(dev_info_t *dip)
{
        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        return (1);
}

/*ARGSUSED*/
static int
megasas_tran_unquiesce(dev_info_t *dip)
{
        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        return (1);
}

/*
 * megasas_isr(caddr_t)
 *
 * The Interrupt Service Routine
 *
 * Collect status for all completed commands and do callback
 *
 */
static uint_t
megasas_isr(struct megasas_instance *instance)
{
        int             need_softintr;
        uint32_t        producer;
        uint32_t        consumer;
        uint32_t        context;

        struct megasas_cmd      *cmd;

        con_log(CL_ANN1, (CE_NOTE, "chkpnt:%s:%d", __func__, __LINE__));

        ASSERT(instance);
        if (!instance->func_ptr->intr_ack(instance)) {
                return (DDI_INTR_UNCLAIMED);
        }

        (void) ddi_dma_sync(instance->mfi_internal_dma_obj.dma_handle,
            0, 0, DDI_DMA_SYNC_FORCPU);

        if (megasas_check_dma_handle(instance->mfi_internal_dma_obj.dma_handle)
            != DDI_SUCCESS) {
                megasas_fm_ereport(instance, DDI_FM_DEVICE_NO_RESPONSE);
                ddi_fm_service_impact(instance->dip, DDI_SERVICE_LOST);
                return (DDI_INTR_UNCLAIMED);
        }

        producer = *instance->producer;
        consumer = *instance->consumer;

        con_log(CL_ANN1, (CE_CONT, " producer %x consumer %x ",
            producer, consumer));

        mutex_enter(&instance->completed_pool_mtx);

        while (consumer != producer) {
                context = instance->reply_queue[consumer];
                cmd = instance->cmd_list[context];
                mlist_add_tail(&cmd->list, &instance->completed_pool_list);

                consumer++;
                if (consumer == (instance->max_fw_cmds + 1)) {
                        consumer = 0;
                }
        }

        mutex_exit(&instance->completed_pool_mtx);

        *instance->consumer = consumer;
        (void) ddi_dma_sync(instance->mfi_internal_dma_obj.dma_handle,
            0, 0, DDI_DMA_SYNC_FORDEV);

        if (instance->softint_running) {
                need_softintr = 0;
        } else {
                need_softintr = 1;
        }

        if (instance->isr_level == HIGH_LEVEL_INTR) {
                if (need_softintr) {
                        ddi_trigger_softintr(instance->soft_intr_id);
                }
        } else {
                /*
                 * Not a high-level interrupt, therefore call the soft level
                 * interrupt explicitly
                 */
                (void) megasas_softintr(instance);
        }

        return (DDI_INTR_CLAIMED);
}


/*
 * ************************************************************************** *
 *                                                                            *
 *                                  libraries                                 *
 *                                                                            *
 * ************************************************************************** *
 */
/*
 * get_mfi_pkt : Get a command from the free pool
 */
static struct megasas_cmd *
get_mfi_pkt(struct megasas_instance *instance)
{
        mlist_t                 *head = &instance->cmd_pool_list;
        struct megasas_cmd      *cmd = NULL;

        mutex_enter(&instance->cmd_pool_mtx);
        ASSERT(mutex_owned(&instance->cmd_pool_mtx));

        if (!mlist_empty(head)) {
                cmd = mlist_entry(head->next, struct megasas_cmd, list);
                mlist_del_init(head->next);
        }
        if (cmd != NULL)
                cmd->pkt = NULL;
        mutex_exit(&instance->cmd_pool_mtx);

        return (cmd);
}

/*
 * return_mfi_pkt : Return a cmd to free command pool
 */
static void
return_mfi_pkt(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
        mutex_enter(&instance->cmd_pool_mtx);
        ASSERT(mutex_owned(&instance->cmd_pool_mtx));

        mlist_add(&cmd->list, &instance->cmd_pool_list);

        mutex_exit(&instance->cmd_pool_mtx);
}

/*
 * destroy_mfi_frame_pool
 */
static void
destroy_mfi_frame_pool(struct megasas_instance *instance)
{
        int             i;
        uint32_t        max_cmd = instance->max_fw_cmds;

        struct megasas_cmd      *cmd;

        /* return all frames to pool */
        for (i = 0; i < max_cmd; i++) {

                cmd = instance->cmd_list[i];

                if (cmd->frame_dma_obj_status == DMA_OBJ_ALLOCATED)
                        (void) mega_free_dma_obj(instance, cmd->frame_dma_obj);

                cmd->frame_dma_obj_status  = DMA_OBJ_FREED;
        }

}

/*
 * create_mfi_frame_pool
 */
static int
create_mfi_frame_pool(struct megasas_instance *instance)
{
        int             i = 0;
        int             cookie_cnt;
        uint16_t        max_cmd;
        uint16_t        sge_sz;
        uint32_t        sgl_sz;
        uint32_t        tot_frame_size;

        struct megasas_cmd      *cmd;

        max_cmd = instance->max_fw_cmds;

        sge_sz  = sizeof (struct megasas_sge64);

        /* calculated the number of 64byte frames required for SGL */
        sgl_sz          = sge_sz * instance->max_num_sge;
        tot_frame_size  = sgl_sz + MEGAMFI_FRAME_SIZE + SENSE_LENGTH;

        con_log(CL_DLEVEL3, (CE_NOTE, "create_mfi_frame_pool: "
            "sgl_sz %x tot_frame_size %x", sgl_sz, tot_frame_size));

        while (i < max_cmd) {
                cmd = instance->cmd_list[i];

                cmd->frame_dma_obj.size = tot_frame_size;
                cmd->frame_dma_obj.dma_attr = megasas_generic_dma_attr;
                cmd->frame_dma_obj.dma_attr.dma_attr_addr_hi = 0xFFFFFFFFU;
                cmd->frame_dma_obj.dma_attr.dma_attr_count_max = 0xFFFFFFFFU;
                cmd->frame_dma_obj.dma_attr.dma_attr_sgllen = 1;
                cmd->frame_dma_obj.dma_attr.dma_attr_align = 64;


                cookie_cnt = mega_alloc_dma_obj(instance, &cmd->frame_dma_obj);

                if (cookie_cnt == -1 || cookie_cnt > 1) {
                        con_log(CL_ANN, (CE_WARN,
                            "create_mfi_frame_pool: could not alloc."));
                        return (DDI_FAILURE);
                }

                bzero(cmd->frame_dma_obj.buffer, tot_frame_size);

                cmd->frame_dma_obj_status = DMA_OBJ_ALLOCATED;
                cmd->frame = (union megasas_frame *)cmd->frame_dma_obj.buffer;
                cmd->frame_phys_addr =
                    cmd->frame_dma_obj.dma_cookie[0].dmac_address;

                cmd->sense = (uint8_t *)(((unsigned long)
                    cmd->frame_dma_obj.buffer) +
                    tot_frame_size - SENSE_LENGTH);
                cmd->sense_phys_addr =
                    cmd->frame_dma_obj.dma_cookie[0].dmac_address +
                    tot_frame_size - SENSE_LENGTH;

                if (!cmd->frame || !cmd->sense) {
                        con_log(CL_ANN, (CE_NOTE,
                            "megasas: pci_pool_alloc failed \n"));

                        return (-ENOMEM);
                }

                cmd->frame->io.context = cmd->index;
                i++;

                con_log(CL_DLEVEL3, (CE_NOTE, "[%x]-%x",
                    cmd->frame->io.context, cmd->frame_phys_addr));
        }

        return (DDI_SUCCESS);
}

/*
 * free_additional_dma_buffer
 */
static void
free_additional_dma_buffer(struct megasas_instance *instance)
{
        if (instance->mfi_internal_dma_obj.status == DMA_OBJ_ALLOCATED) {
                (void) mega_free_dma_obj(instance,
                    instance->mfi_internal_dma_obj);
                instance->mfi_internal_dma_obj.status = DMA_OBJ_FREED;
        }

        if (instance->mfi_evt_detail_obj.status == DMA_OBJ_ALLOCATED) {
                (void) mega_free_dma_obj(instance,
                    instance->mfi_evt_detail_obj);
                instance->mfi_evt_detail_obj.status = DMA_OBJ_FREED;
        }
}

/*
 * alloc_additional_dma_buffer
 */
static int
alloc_additional_dma_buffer(struct megasas_instance *instance)
{
        uint32_t        reply_q_sz;
        uint32_t        internal_buf_size = PAGESIZE*2;

        /* max cmds plus 1 + producer & consumer */
        reply_q_sz = sizeof (uint32_t) * (instance->max_fw_cmds + 1 + 2);

        instance->mfi_internal_dma_obj.size = internal_buf_size;
        instance->mfi_internal_dma_obj.dma_attr = megasas_generic_dma_attr;
        instance->mfi_internal_dma_obj.dma_attr.dma_attr_addr_hi = 0xFFFFFFFFU;
        instance->mfi_internal_dma_obj.dma_attr.dma_attr_count_max =
            0xFFFFFFFFU;
        instance->mfi_internal_dma_obj.dma_attr.dma_attr_sgllen = 1;

        if (mega_alloc_dma_obj(instance, &instance->mfi_internal_dma_obj)
            != 1) {
                con_log(CL_ANN, (CE_WARN, "megaraid: could not alloc reply Q"));
                return (DDI_FAILURE);
        }

        bzero(instance->mfi_internal_dma_obj.buffer, internal_buf_size);

        instance->mfi_internal_dma_obj.status |= DMA_OBJ_ALLOCATED;

        instance->producer = (uint32_t *)((unsigned long)
            instance->mfi_internal_dma_obj.buffer);
        instance->consumer = (uint32_t *)((unsigned long)
            instance->mfi_internal_dma_obj.buffer + 4);
        instance->reply_queue = (uint32_t *)((unsigned long)
            instance->mfi_internal_dma_obj.buffer + 8);
        instance->internal_buf = (caddr_t)(((unsigned long)
            instance->mfi_internal_dma_obj.buffer) + reply_q_sz + 8);
        instance->internal_buf_dmac_add =
            instance->mfi_internal_dma_obj.dma_cookie[0].dmac_address +
            reply_q_sz;
        instance->internal_buf_size = internal_buf_size -
            (reply_q_sz + 8);

        /* allocate evt_detail */
        instance->mfi_evt_detail_obj.size = sizeof (struct megasas_evt_detail);
        instance->mfi_evt_detail_obj.dma_attr = megasas_generic_dma_attr;
        instance->mfi_evt_detail_obj.dma_attr.dma_attr_addr_hi = 0xFFFFFFFFU;
        instance->mfi_evt_detail_obj.dma_attr.dma_attr_count_max = 0xFFFFFFFFU;
        instance->mfi_evt_detail_obj.dma_attr.dma_attr_sgllen = 1;
        instance->mfi_evt_detail_obj.dma_attr.dma_attr_align = 1;

        if (mega_alloc_dma_obj(instance, &instance->mfi_evt_detail_obj) != 1) {
                con_log(CL_ANN, (CE_WARN, "alloc_additional_dma_buffer: "
                    "could not data transfer buffer alloc."));
                return (DDI_FAILURE);
        }

        bzero(instance->mfi_evt_detail_obj.buffer,
            sizeof (struct megasas_evt_detail));

        instance->mfi_evt_detail_obj.status |= DMA_OBJ_ALLOCATED;

        return (DDI_SUCCESS);
}

/*
 * free_space_for_mfi
 */
static void
free_space_for_mfi(struct megasas_instance *instance)
{
        int             i;
        uint32_t        max_cmd = instance->max_fw_cmds;

        /* already freed */
        if (instance->cmd_list == NULL) {
                return;
        }

        free_additional_dma_buffer(instance);

        /* first free the MFI frame pool */
        destroy_mfi_frame_pool(instance);

        /* free all the commands in the cmd_list */
        for (i = 0; i < instance->max_fw_cmds; i++) {
                kmem_free(instance->cmd_list[i],
                    sizeof (struct megasas_cmd));

                instance->cmd_list[i] = NULL;
        }

        /* free the cmd_list buffer itself */
        kmem_free(instance->cmd_list,
            sizeof (struct megasas_cmd *) * max_cmd);

        instance->cmd_list = NULL;

        INIT_LIST_HEAD(&instance->cmd_pool_list);
}

/*
 * alloc_space_for_mfi
 */
static int
alloc_space_for_mfi(struct megasas_instance *instance)
{
        int             i;
        uint32_t        max_cmd;
        size_t          sz;

        struct megasas_cmd      *cmd;

        max_cmd = instance->max_fw_cmds;
        sz = sizeof (struct megasas_cmd *) * max_cmd;

        /*
         * instance->cmd_list is an array of struct megasas_cmd pointers.
         * Allocate the dynamic array first and then allocate individual
         * commands.
         */
        instance->cmd_list = kmem_zalloc(sz, KM_SLEEP);
        ASSERT(instance->cmd_list);

        for (i = 0; i < max_cmd; i++) {
                instance->cmd_list[i] = kmem_zalloc(sizeof (struct megasas_cmd),
                    KM_SLEEP);
                ASSERT(instance->cmd_list[i]);
        }

        INIT_LIST_HEAD(&instance->cmd_pool_list);

        /* add all the commands to command pool (instance->cmd_pool) */
        for (i = 0; i < max_cmd; i++) {
                cmd             = instance->cmd_list[i];
                cmd->index      = i;

                mlist_add_tail(&cmd->list, &instance->cmd_pool_list);
        }

        /* create a frame pool and assign one frame to each cmd */
        if (create_mfi_frame_pool(instance)) {
                con_log(CL_ANN, (CE_NOTE, "error creating frame DMA pool\n"));
                return (DDI_FAILURE);
        }

        /* create a frame pool and assign one frame to each cmd */
        if (alloc_additional_dma_buffer(instance)) {
                con_log(CL_ANN, (CE_NOTE, "error creating frame DMA pool\n"));
                return (DDI_FAILURE);
        }

        return (DDI_SUCCESS);
}

/*
 * get_ctrl_info
 */
static int
get_ctrl_info(struct megasas_instance *instance,
    struct megasas_ctrl_info *ctrl_info)
{
        int     ret = 0;

        struct megasas_cmd              *cmd;
        struct megasas_dcmd_frame       *dcmd;
        struct megasas_ctrl_info        *ci;

        cmd = get_mfi_pkt(instance);

        if (!cmd) {
                con_log(CL_ANN, (CE_WARN,
                    "Failed to get a cmd for ctrl info\n"));
                return (DDI_FAILURE);
        }

        dcmd = &cmd->frame->dcmd;

        ci = (struct megasas_ctrl_info *)instance->internal_buf;

        if (!ci) {
                con_log(CL_ANN, (CE_WARN,
                    "Failed to alloc mem for ctrl info\n"));
                return_mfi_pkt(instance, cmd);
                return (DDI_FAILURE);
        }

        (void) memset(ci, 0, sizeof (struct megasas_ctrl_info));

        /* for( i = 0; i < DCMD_MBOX_SZ; i++ ) dcmd->mbox.b[i] = 0; */
        (void) memset(dcmd->mbox.b, 0, DCMD_MBOX_SZ);

        dcmd->cmd                       = MFI_CMD_OP_DCMD;
        dcmd->cmd_status                = MFI_CMD_STATUS_POLL_MODE;
        dcmd->sge_count                 = 1;
        dcmd->flags                     = MFI_FRAME_DIR_READ;
        dcmd->timeout                   = 0;
        dcmd->data_xfer_len             = sizeof (struct megasas_ctrl_info);
        dcmd->opcode                    = MR_DCMD_CTRL_GET_INFO;
        dcmd->sgl.sge32[0].phys_addr    = instance->internal_buf_dmac_add;
        dcmd->sgl.sge32[0].length       = sizeof (struct megasas_ctrl_info);

        cmd->frame_count = 1;

        if (!instance->func_ptr->issue_cmd_in_poll_mode(instance, cmd)) {
                ret = 0;
                (void) memcpy(ctrl_info, ci, sizeof (struct megasas_ctrl_info));
        } else {
                con_log(CL_ANN, (CE_WARN, "get_ctrl_info: Ctrl info failed\n"));
                ret = -1;
        }

        return_mfi_pkt(instance, cmd);
        if (megasas_common_check(instance, cmd) != DDI_SUCCESS) {
                ret = -1;
        }

        return (ret);
}

/*
 * abort_aen_cmd
 */
static int
abort_aen_cmd(struct megasas_instance *instance,
    struct megasas_cmd *cmd_to_abort)
{
        int     ret = 0;

        struct megasas_cmd              *cmd;
        struct megasas_abort_frame      *abort_fr;

        cmd = get_mfi_pkt(instance);

        if (!cmd) {
                con_log(CL_ANN, (CE_WARN,
                    "Failed to get a cmd for ctrl info\n"));
                return (DDI_FAILURE);
        }

        abort_fr = &cmd->frame->abort;

        /* prepare and issue the abort frame */
        abort_fr->cmd = MFI_CMD_OP_ABORT;
        abort_fr->cmd_status = MFI_CMD_STATUS_SYNC_MODE;
        abort_fr->flags = 0;
        abort_fr->abort_context = cmd_to_abort->index;
        abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
        abort_fr->abort_mfi_phys_addr_hi = 0;

        instance->aen_cmd->abort_aen = 1;

        cmd->sync_cmd = MEGASAS_TRUE;
        cmd->frame_count = 1;

        if (instance->func_ptr->issue_cmd_in_sync_mode(instance, cmd)) {
                con_log(CL_ANN, (CE_WARN,
                    "abort_aen_cmd: issue_cmd_in_sync_mode failed\n"));
                ret = -1;
        } else {
                ret = 0;
        }

        instance->aen_cmd->abort_aen = 1;
        instance->aen_cmd = 0;

        return_mfi_pkt(instance, cmd);
        (void) megasas_common_check(instance, cmd);

        return (ret);
}

/*
 * init_mfi
 */
static int
init_mfi(struct megasas_instance *instance)
{
        off_t                           reglength;
        struct megasas_cmd              *cmd;
        struct megasas_ctrl_info        ctrl_info;
        struct megasas_init_frame       *init_frame;
        struct megasas_init_queue_info  *initq_info;

        if ((ddi_dev_regsize(instance->dip, REGISTER_SET_IO, &reglength)
            != DDI_SUCCESS) || reglength < MINIMUM_MFI_MEM_SZ) {
                return (DDI_FAILURE);
        }

        if (reglength > DEFAULT_MFI_MEM_SZ) {
                reglength = DEFAULT_MFI_MEM_SZ;
                con_log(CL_DLEVEL1, (CE_NOTE,
                    "mega: register length to map is 0x%lx bytes", reglength));
        }

        if (ddi_regs_map_setup(instance->dip, REGISTER_SET_IO,
            &instance->regmap, 0, reglength, &endian_attr,
            &instance->regmap_handle) != DDI_SUCCESS) {
                con_log(CL_ANN, (CE_NOTE,
                    "megaraid: couldn't map control registers"));

                goto fail_mfi_reg_setup;
        }

        /* we expect the FW state to be READY */
        if (mfi_state_transition_to_ready(instance)) {
                con_log(CL_ANN, (CE_WARN, "megaraid: F/W is not ready"));
                goto fail_ready_state;
        }

        /* get various operational parameters from status register */
        instance->max_num_sge =
            (instance->func_ptr->read_fw_status_reg(instance) &
            0xFF0000) >> 0x10;
        /*
         * Reduce the max supported cmds by 1. This is to ensure that the
         * reply_q_sz (1 more than the max cmd that driver may send)
         * does not exceed max cmds that the FW can support
         */
        instance->max_fw_cmds =
            instance->func_ptr->read_fw_status_reg(instance) & 0xFFFF;
        instance->max_fw_cmds = instance->max_fw_cmds - 1;

        instance->max_num_sge =
            (instance->max_num_sge > MEGASAS_MAX_SGE_CNT) ?
            MEGASAS_MAX_SGE_CNT : instance->max_num_sge;

        /* create a pool of commands */
        if (alloc_space_for_mfi(instance))
                goto fail_alloc_fw_space;

        /* disable interrupt for initial preparation */
        instance->func_ptr->disable_intr(instance);

        /*
         * Prepare a init frame. Note the init frame points to queue info
         * structure. Each frame has SGL allocated after first 64 bytes. For
         * this frame - since we don't need any SGL - we use SGL's space as
         * queue info structure
         */
        cmd = get_mfi_pkt(instance);

        init_frame = (struct megasas_init_frame *)cmd->frame;
        initq_info = (struct megasas_init_queue_info *)
            ((unsigned long)init_frame + 64);

        (void) memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
        (void) memset(initq_info, 0, sizeof (struct megasas_init_queue_info));

        initq_info->init_flags = 0;

        initq_info->reply_queue_entries = instance->max_fw_cmds + 1;

        initq_info->producer_index_phys_addr_hi = 0;
        initq_info->producer_index_phys_addr_lo =
            instance->mfi_internal_dma_obj.dma_cookie[0].dmac_address;

        initq_info->consumer_index_phys_addr_hi = 0;
        initq_info->consumer_index_phys_addr_lo =
            instance->mfi_internal_dma_obj.dma_cookie[0].dmac_address + 4;

        initq_info->reply_queue_start_phys_addr_hi = 0;
        initq_info->reply_queue_start_phys_addr_lo =
            instance->mfi_internal_dma_obj.dma_cookie[0].dmac_address + 8;

        init_frame->cmd                         = MFI_CMD_OP_INIT;
        init_frame->cmd_status                  = MFI_CMD_STATUS_POLL_MODE;
        init_frame->flags                       = 0;
        init_frame->queue_info_new_phys_addr_lo =
            cmd->frame_phys_addr + 64;
        init_frame->queue_info_new_phys_addr_hi = 0;

        init_frame->data_xfer_len = sizeof (struct megasas_init_queue_info);

        cmd->frame_count = 1;

        /* issue the init frame in polled mode */
        if (instance->func_ptr->issue_cmd_in_poll_mode(instance, cmd)) {
                con_log(CL_ANN, (CE_WARN, "failed to init firmware"));
                goto fail_fw_init;
        }

        return_mfi_pkt(instance, cmd);
        if (megasas_common_check(instance, cmd) != DDI_SUCCESS) {
                goto fail_fw_init;
        }

        /* gather misc FW related information */
        if (!get_ctrl_info(instance, &ctrl_info)) {
                instance->max_sectors_per_req = ctrl_info.max_request_size;
                con_log(CL_ANN1, (CE_NOTE, "product name %s ld present %d",
                    ctrl_info.product_name, ctrl_info.ld_present_count));
        } else {
                instance->max_sectors_per_req = instance->max_num_sge *
                    PAGESIZE / 512;
        }

        if (megasas_check_acc_handle(instance->regmap_handle) != DDI_SUCCESS) {
                goto fail_fw_init;
        }

        return (0);

fail_fw_init:
fail_alloc_fw_space:

        free_space_for_mfi(instance);

fail_ready_state:
        ddi_regs_map_free(&instance->regmap_handle);

fail_mfi_reg_setup:
        return (DDI_FAILURE);
}

/*
 * mfi_state_transition_to_ready        : Move the FW to READY state
 *
 * @reg_set                     : MFI register set
 */
static int
mfi_state_transition_to_ready(struct megasas_instance *instance)
{
        int             i;
        uint8_t         max_wait;
        uint32_t        fw_ctrl;
        uint32_t        fw_state;
        uint32_t        cur_state;

        fw_state =
            instance->func_ptr->read_fw_status_reg(instance) & MFI_STATE_MASK;
        con_log(CL_ANN1, (CE_NOTE,
            "mfi_state_transition_to_ready:FW state = 0x%x", fw_state));

        while (fw_state != MFI_STATE_READY) {
                con_log(CL_ANN, (CE_NOTE,
                    "mfi_state_transition_to_ready:FW state%x", fw_state));

                switch (fw_state) {
                case MFI_STATE_FAULT:
                        con_log(CL_ANN, (CE_NOTE,
                            "megasas: FW in FAULT state!!"));

                        return (-ENODEV);
                case MFI_STATE_WAIT_HANDSHAKE:
                        /* set the CLR bit in IMR0 */
                        con_log(CL_ANN, (CE_NOTE,
                            "megasas: FW waiting for HANDSHAKE"));
                        /*
                         * PCI_Hot Plug: MFI F/W requires
                         * (MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG)
                         * to be set
                         */
                        /* WR_IB_MSG_0(MFI_INIT_CLEAR_HANDSHAKE, instance); */
                        WR_IB_DOORBELL(MFI_INIT_CLEAR_HANDSHAKE |
                            MFI_INIT_HOTPLUG, instance);

                        max_wait        = 2;
                        cur_state       = MFI_STATE_WAIT_HANDSHAKE;
                        break;
                case MFI_STATE_BOOT_MESSAGE_PENDING:
                        /* set the CLR bit in IMR0 */
                        con_log(CL_ANN, (CE_NOTE,
                            "megasas: FW state boot message pending"));
                        /*
                         * PCI_Hot Plug: MFI F/W requires
                         * (MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG)
                         * to be set
                         */
                        WR_IB_DOORBELL(MFI_INIT_HOTPLUG, instance);

                        max_wait        = 10;
                        cur_state       = MFI_STATE_BOOT_MESSAGE_PENDING;
                        break;
                case MFI_STATE_OPERATIONAL:
                        /* bring it to READY state; assuming max wait 2 secs */
                        instance->func_ptr->disable_intr(instance);
                        con_log(CL_ANN1, (CE_NOTE,
                            "megasas: FW in OPERATIONAL state"));
                        /*
                         * PCI_Hot Plug: MFI F/W requires
                         * (MFI_INIT_READY | MFI_INIT_MFIMODE | MFI_INIT_ABORT)
                         * to be set
                         */
                        /* WR_IB_DOORBELL(MFI_INIT_READY, instance); */
                        WR_IB_DOORBELL(MFI_RESET_FLAGS, instance);

                        max_wait        = 10;
                        cur_state       = MFI_STATE_OPERATIONAL;
                        break;
                case MFI_STATE_UNDEFINED:
                        /* this state should not last for more than 2 seconds */
                        con_log(CL_ANN, (CE_NOTE, "FW state undefined\n"));

                        max_wait        = 2;
                        cur_state       = MFI_STATE_UNDEFINED;
                        break;
                case MFI_STATE_BB_INIT:
                        max_wait        = 2;
                        cur_state       = MFI_STATE_BB_INIT;
                        break;
                case MFI_STATE_FW_INIT:
                        max_wait        = 2;
                        cur_state       = MFI_STATE_FW_INIT;
                        break;
                case MFI_STATE_DEVICE_SCAN:
                        max_wait        = 10;
                        cur_state       = MFI_STATE_DEVICE_SCAN;
                        break;
                default:
                        con_log(CL_ANN, (CE_NOTE,
                            "megasas: Unknown state 0x%x\n", fw_state));
                        return (-ENODEV);
                }

                /* the cur_state should not last for more than max_wait secs */
                for (i = 0; i < (max_wait * MILLISEC); i++) {
                        /* fw_state = RD_OB_MSG_0(instance) & MFI_STATE_MASK; */
                        fw_state =
                            instance->func_ptr->read_fw_status_reg(instance) &
                            MFI_STATE_MASK;

                        if (fw_state == cur_state) {
                                delay(1 * drv_usectohz(MILLISEC));
                        } else {
                                break;
                        }
                }

                /* return error if fw_state hasn't changed after max_wait */
                if (fw_state == cur_state) {
                        con_log(CL_ANN, (CE_NOTE,
                            "FW state hasn't changed in %d secs\n", max_wait));
                        return (-ENODEV);
                }
        };

        fw_ctrl = RD_IB_DOORBELL(instance);

        con_log(CL_ANN1, (CE_NOTE,
            "mfi_state_transition_to_ready:FW ctrl = 0x%x", fw_ctrl));

        /*
         * Write 0xF to the doorbell register to do the following.
         * - Abort all outstanding commands (bit 0).
         * - Transition from OPERATIONAL to READY state (bit 1).
         * - Discard (possible) low MFA posted in 64-bit mode (bit-2).
         * - Set to release FW to continue running (i.e. BIOS handshake
         *   (bit 3).
         */
        WR_IB_DOORBELL(0xF, instance);

        if (megasas_check_acc_handle(instance->regmap_handle) != DDI_SUCCESS) {
                return (-ENODEV);
        }
        return (0);
}

/*
 * get_seq_num
 */
static int
get_seq_num(struct megasas_instance *instance,
    struct megasas_evt_log_info *eli)
{
        int     ret = 0;

        dma_obj_t                       dcmd_dma_obj;
        struct megasas_cmd              *cmd;
        struct megasas_dcmd_frame       *dcmd;

        cmd = get_mfi_pkt(instance);

        if (!cmd) {
                cmn_err(CE_WARN, "megasas: failed to get a cmd\n");
                return (-ENOMEM);
        }

        dcmd    = &cmd->frame->dcmd;

        /* allocate the data transfer buffer */
        dcmd_dma_obj.size = sizeof (struct megasas_evt_log_info);
        dcmd_dma_obj.dma_attr = megasas_generic_dma_attr;
        dcmd_dma_obj.dma_attr.dma_attr_addr_hi = 0xFFFFFFFFU;
        dcmd_dma_obj.dma_attr.dma_attr_count_max = 0xFFFFFFFFU;
        dcmd_dma_obj.dma_attr.dma_attr_sgllen = 1;
        dcmd_dma_obj.dma_attr.dma_attr_align = 1;

        if (mega_alloc_dma_obj(instance, &dcmd_dma_obj) != 1) {
                con_log(CL_ANN, (CE_WARN,
                    "get_seq_num: could not data transfer buffer alloc."));
                return (DDI_FAILURE);
        }

        (void) memset(dcmd_dma_obj.buffer, 0,
            sizeof (struct megasas_evt_log_info));

        (void) memset(dcmd->mbox.b, 0, DCMD_MBOX_SZ);

        dcmd->cmd = MFI_CMD_OP_DCMD;
        dcmd->cmd_status = 0;
        dcmd->sge_count = 1;
        dcmd->flags = MFI_FRAME_DIR_READ;
        dcmd->timeout = 0;
        dcmd->data_xfer_len = sizeof (struct megasas_evt_log_info);
        dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
        dcmd->sgl.sge32[0].length = sizeof (struct megasas_evt_log_info);
        dcmd->sgl.sge32[0].phys_addr = dcmd_dma_obj.dma_cookie[0].dmac_address;

        cmd->sync_cmd = MEGASAS_TRUE;
        cmd->frame_count = 1;

        if (instance->func_ptr->issue_cmd_in_sync_mode(instance, cmd)) {
                cmn_err(CE_WARN, "get_seq_num: "
                    "failed to issue MR_DCMD_CTRL_EVENT_GET_INFO\n");
                ret = -1;
        } else {
                /* copy the data back into callers buffer */
                bcopy(dcmd_dma_obj.buffer, eli,
                    sizeof (struct megasas_evt_log_info));
                ret = 0;
        }

        if (mega_free_dma_obj(instance, dcmd_dma_obj) != DDI_SUCCESS)
                ret = -1;

        return_mfi_pkt(instance, cmd);
        if (megasas_common_check(instance, cmd) != DDI_SUCCESS) {
                ret = -1;
        }
        return (ret);
}

/*
 * start_mfi_aen
 */
static int
start_mfi_aen(struct megasas_instance *instance)
{
        int     ret = 0;

        struct megasas_evt_log_info     eli;
        union megasas_evt_class_locale  class_locale;

        /* get the latest sequence number from FW */
        (void) memset(&eli, 0, sizeof (struct megasas_evt_log_info));

        if (get_seq_num(instance, &eli)) {
                cmn_err(CE_WARN, "start_mfi_aen: failed to get seq num\n");
                return (-1);
        }

        /* register AEN with FW for latest sequence number plus 1 */
        class_locale.members.reserved   = 0;
        class_locale.members.locale     = MR_EVT_LOCALE_ALL;
        class_locale.members.class      = MR_EVT_CLASS_CRITICAL;

        ret = register_mfi_aen(instance, eli.newest_seq_num + 1,
            class_locale.word);

        if (ret) {
                cmn_err(CE_WARN, "start_mfi_aen: aen registration failed\n");
                return (-1);
        }

        return (ret);
}

/*
 * flush_cache
 */
static void
flush_cache(struct megasas_instance *instance)
{
        struct megasas_cmd              *cmd;
        struct megasas_dcmd_frame       *dcmd;

        if (!(cmd = get_mfi_pkt(instance)))
                return;

        dcmd = &cmd->frame->dcmd;

        (void) memset(dcmd->mbox.b, 0, DCMD_MBOX_SZ);

        dcmd->cmd               = MFI_CMD_OP_DCMD;
        dcmd->cmd_status        = 0x0;
        dcmd->sge_count         = 0;
        dcmd->flags             = MFI_FRAME_DIR_NONE;
        dcmd->timeout           = 0;
        dcmd->data_xfer_len     = 0;
        dcmd->opcode            = MR_DCMD_CTRL_CACHE_FLUSH;
        dcmd->mbox.b[0]         = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;

        cmd->frame_count = 1;

        if (instance->func_ptr->issue_cmd_in_poll_mode(instance, cmd)) {
                cmn_err(CE_WARN,
                    "flush_cache: failed to issue MFI_DCMD_CTRL_CACHE_FLUSH\n");
        }
        con_log(CL_DLEVEL1, (CE_NOTE, "done"));
        return_mfi_pkt(instance, cmd);
        (void) megasas_common_check(instance, cmd);
}

/*
 * service_mfi_aen-     Completes an AEN command
 * @instance:                   Adapter soft state
 * @cmd:                        Command to be completed
 *
 */
static void
service_mfi_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
        uint32_t        seq_num;
        struct megasas_evt_detail *evt_detail =
            (struct megasas_evt_detail *)instance->mfi_evt_detail_obj.buffer;

        cmd->cmd_status = cmd->frame->io.cmd_status;

        if (cmd->cmd_status == ENODATA) {
                cmd->cmd_status = 0;
        }

        /*
         * log the MFI AEN event to the sysevent queue so that
         * application will get noticed
         */
        if (ddi_log_sysevent(instance->dip, DDI_VENDOR_LSI, "LSIMEGA", "SAS",
            NULL, NULL, DDI_NOSLEEP) != DDI_SUCCESS) {
                int     instance_no = ddi_get_instance(instance->dip);
                con_log(CL_ANN, (CE_WARN,
                    "mega%d: Failed to log AEN event", instance_no));
        }

        /* get copy of seq_num and class/locale for re-registration */
        seq_num = evt_detail->seq_num;
        seq_num++;
        (void) memset(instance->mfi_evt_detail_obj.buffer, 0,
            sizeof (struct megasas_evt_detail));

        cmd->frame->dcmd.cmd_status = 0x0;
        cmd->frame->dcmd.mbox.w[0] = seq_num;

        instance->aen_seq_num = seq_num;

        cmd->frame_count = 1;

        /* Issue the aen registration frame */
        instance->func_ptr->issue_cmd(cmd, instance);
}

/*
 * complete_cmd_in_sync_mode -  Completes an internal command
 * @instance:                   Adapter soft state
 * @cmd:                        Command to be completed
 *
 * The issue_cmd_in_sync_mode() function waits for a command to complete
 * after it issues a command. This function wakes up that waiting routine by
 * calling wake_up() on the wait queue.
 */
static void
complete_cmd_in_sync_mode(struct megasas_instance *instance,
    struct megasas_cmd *cmd)
{
        cmd->cmd_status = cmd->frame->io.cmd_status;

        cmd->sync_cmd = MEGASAS_FALSE;

        if (cmd->cmd_status == ENODATA) {
                cmd->cmd_status = 0;
        }

        cv_broadcast(&instance->int_cmd_cv);
}

/*
 * megasas_softintr - The Software ISR
 * @param arg   : HBA soft state
 *
 * called from high-level interrupt if hi-level interrupt are not there,
 * otherwise triggered as a soft interrupt
 */
static uint_t
megasas_softintr(struct megasas_instance *instance)
{
        struct scsi_pkt         *pkt;
        struct scsa_cmd         *acmd;
        struct megasas_cmd      *cmd;
        struct mlist_head       *pos, *next;
        mlist_t                 process_list;
        struct megasas_header   *hdr;
        struct scsi_arq_status  *arqstat;

        con_log(CL_ANN1, (CE_CONT, "megasas_softintr called"));

        ASSERT(instance);
        mutex_enter(&instance->completed_pool_mtx);

        if (mlist_empty(&instance->completed_pool_list)) {
                mutex_exit(&instance->completed_pool_mtx);
                return (DDI_INTR_UNCLAIMED);
        }

        instance->softint_running = 1;

        INIT_LIST_HEAD(&process_list);
        mlist_splice(&instance->completed_pool_list, &process_list);
        INIT_LIST_HEAD(&instance->completed_pool_list);

        mutex_exit(&instance->completed_pool_mtx);

        /* perform all callbacks first, before releasing the SCBs */
        mlist_for_each_safe(pos, next, &process_list) {
                cmd = mlist_entry(pos, struct megasas_cmd, list);

                /* syncronize the Cmd frame for the controller */
                (void) ddi_dma_sync(cmd->frame_dma_obj.dma_handle,
                    0, 0, DDI_DMA_SYNC_FORCPU);

                if (megasas_check_dma_handle(cmd->frame_dma_obj.dma_handle) !=
                    DDI_SUCCESS) {
                        megasas_fm_ereport(instance, DDI_FM_DEVICE_NO_RESPONSE);
                        ddi_fm_service_impact(instance->dip, DDI_SERVICE_LOST);
                        return (DDI_INTR_UNCLAIMED);
                }

                hdr = &cmd->frame->hdr;

                /* remove the internal command from the process list */
                mlist_del_init(&cmd->list);

                switch (hdr->cmd) {
                case MFI_CMD_OP_PD_SCSI:
                case MFI_CMD_OP_LD_SCSI:
                case MFI_CMD_OP_LD_READ:
                case MFI_CMD_OP_LD_WRITE:
                        /*
                         * MFI_CMD_OP_PD_SCSI and MFI_CMD_OP_LD_SCSI
                         * could have been issued either through an
                         * IO path or an IOCTL path. If it was via IOCTL,
                         * we will send it to internal completion.
                         */
                        if (cmd->sync_cmd == MEGASAS_TRUE) {
                                complete_cmd_in_sync_mode(instance, cmd);
                                break;
                        }

                        /* regular commands */
                        acmd =  cmd->cmd;
                        pkt =   CMD2PKT(acmd);

                        if (acmd->cmd_flags & CFLAG_DMAVALID) {
                                if (acmd->cmd_flags & CFLAG_CONSISTENT) {
                                        (void) ddi_dma_sync(acmd->cmd_dmahandle,
                                            acmd->cmd_dma_offset,
                                            acmd->cmd_dma_len,
                                            DDI_DMA_SYNC_FORCPU);
                                }
                        }

                        pkt->pkt_reason         = CMD_CMPLT;
                        pkt->pkt_statistics     = 0;
                        pkt->pkt_state = STATE_GOT_BUS
                            | STATE_GOT_TARGET | STATE_SENT_CMD
                            | STATE_XFERRED_DATA | STATE_GOT_STATUS;

                        con_log(CL_ANN1, (CE_CONT,
                            "CDB[0] = %x completed for %s: size %lx context %x",
                            pkt->pkt_cdbp[0], ((acmd->islogical) ? "LD" : "PD"),
                            acmd->cmd_dmacount, hdr->context));

                        if (pkt->pkt_cdbp[0] == SCMD_INQUIRY) {
                                struct scsi_inquiry     *inq;

                                if (acmd->cmd_dmacount != 0) {
                                        bp_mapin(acmd->cmd_buf);
                                        inq = (struct scsi_inquiry *)
                                            acmd->cmd_buf->b_un.b_addr;

                                        /* don't expose physical drives to OS */
                                        if (acmd->islogical &&
                                            (hdr->cmd_status == MFI_STAT_OK)) {
                                                display_scsi_inquiry(
                                                    (caddr_t)inq);
                                        } else if ((hdr->cmd_status ==
                                            MFI_STAT_OK) && inq->inq_dtype ==
                                            DTYPE_DIRECT) {

                                                display_scsi_inquiry(
                                                    (caddr_t)inq);

                                                /* for physical disk */
                                                hdr->cmd_status =
                                                    MFI_STAT_DEVICE_NOT_FOUND;
                                        }
                                }
                        }

                        switch (hdr->cmd_status) {
                        case MFI_STAT_OK:
                                pkt->pkt_scbp[0] = STATUS_GOOD;
                                break;
                        case MFI_STAT_LD_CC_IN_PROGRESS:
                        case MFI_STAT_LD_RECON_IN_PROGRESS:
                            /* SJ - these are not correct way */
                                pkt->pkt_scbp[0] = STATUS_GOOD;
                                break;
                        case MFI_STAT_LD_INIT_IN_PROGRESS:
                                con_log(CL_ANN,
                                    (CE_WARN, "Initialization in Progress"));
                                pkt->pkt_reason = CMD_TRAN_ERR;

                                break;
                        case MFI_STAT_SCSI_DONE_WITH_ERROR:
                                con_log(CL_ANN1, (CE_CONT, "scsi_done error"));

                                pkt->pkt_reason = CMD_CMPLT;
                                ((struct scsi_status *)
                                    pkt->pkt_scbp)->sts_chk = 1;

                                if (pkt->pkt_cdbp[0] == SCMD_TEST_UNIT_READY) {

                                        con_log(CL_ANN,
                                            (CE_WARN, "TEST_UNIT_READY fail"));

                                } else {
                                        pkt->pkt_state |= STATE_ARQ_DONE;
                                        arqstat = (void *)(pkt->pkt_scbp);
                                        arqstat->sts_rqpkt_reason = CMD_CMPLT;
                                        arqstat->sts_rqpkt_resid = 0;
                                        arqstat->sts_rqpkt_state |=
                                            STATE_GOT_BUS | STATE_GOT_TARGET
                                            | STATE_SENT_CMD
                                            | STATE_XFERRED_DATA;
                                        *(uint8_t *)&arqstat->sts_rqpkt_status =
                                            STATUS_GOOD;

                                        bcopy(cmd->sense,
                                            &(arqstat->sts_sensedata),
                                            acmd->cmd_scblen -
                                            offsetof(struct scsi_arq_status,
                                            sts_sensedata));
                                }
                                break;
                        case MFI_STAT_LD_OFFLINE:
                        case MFI_STAT_DEVICE_NOT_FOUND:
                                con_log(CL_ANN1, (CE_CONT,
                                    "device not found error"));
                                pkt->pkt_reason = CMD_DEV_GONE;
                                pkt->pkt_statistics  = STAT_DISCON;
                                break;
                        case MFI_STAT_LD_LBA_OUT_OF_RANGE:
                                pkt->pkt_state |= STATE_ARQ_DONE;
                                pkt->pkt_reason = CMD_CMPLT;
                                ((struct scsi_status *)
                                    pkt->pkt_scbp)->sts_chk = 1;

                                arqstat = (void *)(pkt->pkt_scbp);
                                arqstat->sts_rqpkt_reason = CMD_CMPLT;
                                arqstat->sts_rqpkt_resid = 0;
                                arqstat->sts_rqpkt_state |= STATE_GOT_BUS
                                    | STATE_GOT_TARGET | STATE_SENT_CMD
                                    | STATE_XFERRED_DATA;
                                *(uint8_t *)&arqstat->sts_rqpkt_status =
                                    STATUS_GOOD;

                                arqstat->sts_sensedata.es_valid = 1;
                                arqstat->sts_sensedata.es_key =
                                    KEY_ILLEGAL_REQUEST;
                                arqstat->sts_sensedata.es_class =
                                    CLASS_EXTENDED_SENSE;

                                /*
                                 * LOGICAL BLOCK ADDRESS OUT OF RANGE:
                                 * ASC: 0x21h; ASCQ: 0x00h;
                                 */
                                arqstat->sts_sensedata.es_add_code = 0x21;
                                arqstat->sts_sensedata.es_qual_code = 0x00;

                                break;

                        default:
                                con_log(CL_ANN, (CE_CONT, "Unknown status!"));
                                pkt->pkt_reason = CMD_TRAN_ERR;

                                break;
                        }

                        atomic_add_16(&instance->fw_outstanding, (-1));

                        return_mfi_pkt(instance, cmd);

                        (void) megasas_common_check(instance, cmd);

                        if (acmd->cmd_dmahandle) {
                                if (megasas_check_dma_handle(
                                    acmd->cmd_dmahandle) != DDI_SUCCESS) {
                                        ddi_fm_service_impact(instance->dip,
                                            DDI_SERVICE_UNAFFECTED);
                                        pkt->pkt_reason = CMD_TRAN_ERR;
                                        pkt->pkt_statistics = 0;
                                }
                        }

                        /* Call the callback routine */
                        if ((pkt->pkt_flags & FLAG_NOINTR) == 0) {
                                scsi_hba_pkt_comp(pkt);
                        }

                        break;
                case MFI_CMD_OP_SMP:
                case MFI_CMD_OP_STP:
                        complete_cmd_in_sync_mode(instance, cmd);
                        break;
                case MFI_CMD_OP_DCMD:
                        /* see if got an event notification */
                        if (cmd->frame->dcmd.opcode ==
                            MR_DCMD_CTRL_EVENT_WAIT) {
                                if ((instance->aen_cmd == cmd) &&
                                    (instance->aen_cmd->abort_aen)) {
                                        con_log(CL_ANN, (CE_WARN,
                                            "megasas_softintr: "
                                            "aborted_aen returned"));
                                } else {
                                        service_mfi_aen(instance, cmd);

                                        atomic_add_16(&instance->fw_outstanding,
                                            (-1));
                                }
                        } else {
                                complete_cmd_in_sync_mode(instance, cmd);
                        }

                        break;
                case MFI_CMD_OP_ABORT:
                        con_log(CL_ANN, (CE_WARN, "MFI_CMD_OP_ABORT complete"));
                        /*
                         * MFI_CMD_OP_ABORT successfully completed
                         * in the synchronous mode
                         */
                        complete_cmd_in_sync_mode(instance, cmd);
                        break;
                default:
                        megasas_fm_ereport(instance, DDI_FM_DEVICE_NO_RESPONSE);
                        ddi_fm_service_impact(instance->dip, DDI_SERVICE_LOST);

                        if (cmd->pkt != NULL) {
                                pkt = cmd->pkt;
                                if ((pkt->pkt_flags & FLAG_NOINTR) == 0) {
                                        scsi_hba_pkt_comp(pkt);
                                }
                        }
                        con_log(CL_ANN, (CE_WARN, "Cmd type unknown !!"));
                        break;
                }
        }

        instance->softint_running = 0;

        return (DDI_INTR_CLAIMED);
}

/*
 * mega_alloc_dma_obj
 *
 * Allocate the memory and other resources for an dma object.
 */
static int
mega_alloc_dma_obj(struct megasas_instance *instance, dma_obj_t *obj)
{
        int     i;
        size_t  alen = 0;
        uint_t  cookie_cnt;
        struct ddi_device_acc_attr      tmp_endian_attr;

        tmp_endian_attr = endian_attr;
        tmp_endian_attr.devacc_attr_access = DDI_DEFAULT_ACC;
        i = ddi_dma_alloc_handle(instance->dip, &obj->dma_attr,
            DDI_DMA_SLEEP, NULL, &obj->dma_handle);
        if (i != DDI_SUCCESS) {

                switch (i) {
                        case DDI_DMA_BADATTR :
                                con_log(CL_ANN, (CE_WARN,
                                "Failed ddi_dma_alloc_handle- Bad atrib"));
                                break;
                        case DDI_DMA_NORESOURCES :
                                con_log(CL_ANN, (CE_WARN,
                                "Failed ddi_dma_alloc_handle- No Resources"));
                                break;
                        default :
                                con_log(CL_ANN, (CE_WARN,
                                "Failed ddi_dma_alloc_handle :unknown %d", i));
                                break;
                }

                return (-1);
        }

        if ((ddi_dma_mem_alloc(obj->dma_handle, obj->size, &tmp_endian_attr,
            DDI_DMA_RDWR | DDI_DMA_STREAMING, DDI_DMA_SLEEP, NULL,
            &obj->buffer, &alen, &obj->acc_handle) != DDI_SUCCESS) ||
            alen < obj->size) {

                ddi_dma_free_handle(&obj->dma_handle);

                con_log(CL_ANN, (CE_WARN, "Failed : ddi_dma_mem_alloc"));

                return (-1);
        }

        if (ddi_dma_addr_bind_handle(obj->dma_handle, NULL, obj->buffer,
            obj->size, DDI_DMA_RDWR | DDI_DMA_STREAMING, DDI_DMA_SLEEP,
            NULL, &obj->dma_cookie[0], &cookie_cnt) != DDI_SUCCESS) {

                ddi_dma_mem_free(&obj->acc_handle);
                ddi_dma_free_handle(&obj->dma_handle);

                con_log(CL_ANN, (CE_WARN, "Failed : ddi_dma_addr_bind_handle"));

                return (-1);
        }

        if (megasas_check_dma_handle(obj->dma_handle) != DDI_SUCCESS) {
                ddi_fm_service_impact(instance->dip, DDI_SERVICE_LOST);
                return (-1);
        }

        if (megasas_check_acc_handle(obj->acc_handle) != DDI_SUCCESS) {
                ddi_fm_service_impact(instance->dip, DDI_SERVICE_LOST);
                return (-1);
        }

        return (cookie_cnt);
}

/*
 * mega_free_dma_obj(struct megasas_instance *, dma_obj_t)
 *
 * De-allocate the memory and other resources for an dma object, which must
 * have been alloated by a previous call to mega_alloc_dma_obj()
 */
static int
mega_free_dma_obj(struct megasas_instance *instance, dma_obj_t obj)
{

        if (megasas_check_dma_handle(obj.dma_handle) != DDI_SUCCESS) {
                ddi_fm_service_impact(instance->dip, DDI_SERVICE_UNAFFECTED);
                return (DDI_FAILURE);
        }

        if (megasas_check_acc_handle(obj.acc_handle) != DDI_SUCCESS) {
                ddi_fm_service_impact(instance->dip, DDI_SERVICE_UNAFFECTED);
                return (DDI_FAILURE);
        }

        (void) ddi_dma_unbind_handle(obj.dma_handle);
        ddi_dma_mem_free(&obj.acc_handle);
        ddi_dma_free_handle(&obj.dma_handle);

        return (DDI_SUCCESS);
}

/*
 * megasas_dma_alloc(instance_t *, struct scsi_pkt *, struct buf *,
 * int, int (*)())
 *
 * Allocate dma resources for a new scsi command
 */
static int
megasas_dma_alloc(struct megasas_instance *instance, struct scsi_pkt *pkt,
    struct buf *bp, int flags, int (*callback)())
{
        int     dma_flags;
        int     (*cb)(caddr_t);
        int     i;

        ddi_dma_attr_t  tmp_dma_attr = megasas_generic_dma_attr;
        struct scsa_cmd *acmd = PKT2CMD(pkt);

        acmd->cmd_buf = bp;

        if (bp->b_flags & B_READ) {
                acmd->cmd_flags &= ~CFLAG_DMASEND;
                dma_flags = DDI_DMA_READ;
        } else {
                acmd->cmd_flags |= CFLAG_DMASEND;
                dma_flags = DDI_DMA_WRITE;
        }

        if (flags & PKT_CONSISTENT) {
                acmd->cmd_flags |= CFLAG_CONSISTENT;
                dma_flags |= DDI_DMA_CONSISTENT;
        }

        if (flags & PKT_DMA_PARTIAL) {
                dma_flags |= DDI_DMA_PARTIAL;
        }

        dma_flags |= DDI_DMA_REDZONE;

        cb = (callback == NULL_FUNC) ? DDI_DMA_DONTWAIT : DDI_DMA_SLEEP;

        tmp_dma_attr.dma_attr_sgllen = instance->max_num_sge;
        tmp_dma_attr.dma_attr_addr_hi = 0xffffffffffffffffull;

        if ((i = ddi_dma_alloc_handle(instance->dip, &tmp_dma_attr,
            cb, 0, &acmd->cmd_dmahandle)) != DDI_SUCCESS) {
                switch (i) {
                case DDI_DMA_BADATTR:
                        bioerror(bp, EFAULT);
                        return (-1);

                case DDI_DMA_NORESOURCES:
                        bioerror(bp, 0);
                        return (-1);

                default:
                        con_log(CL_ANN, (CE_PANIC, "ddi_dma_alloc_handle: "
                            "0x%x impossible\n", i));
                        bioerror(bp, EFAULT);
                        return (-1);
                }
        }

        i = ddi_dma_buf_bind_handle(acmd->cmd_dmahandle, bp, dma_flags,
            cb, 0, &acmd->cmd_dmacookies[0], &acmd->cmd_ncookies);

        switch (i) {
        case DDI_DMA_PARTIAL_MAP:
                if ((dma_flags & DDI_DMA_PARTIAL) == 0) {
                        con_log(CL_ANN, (CE_PANIC, "ddi_dma_buf_bind_handle: "
                            "DDI_DMA_PARTIAL_MAP impossible\n"));
                        goto no_dma_cookies;
                }

                if (ddi_dma_numwin(acmd->cmd_dmahandle, &acmd->cmd_nwin) ==
                    DDI_FAILURE) {
                        con_log(CL_ANN, (CE_PANIC, "ddi_dma_numwin failed\n"));
                        goto no_dma_cookies;
                }

                if (ddi_dma_getwin(acmd->cmd_dmahandle, acmd->cmd_curwin,
                    &acmd->cmd_dma_offset, &acmd->cmd_dma_len,
                    &acmd->cmd_dmacookies[0], &acmd->cmd_ncookies) ==
                    DDI_FAILURE) {

                        con_log(CL_ANN, (CE_PANIC, "ddi_dma_getwin failed\n"));
                        goto no_dma_cookies;
                }

                goto get_dma_cookies;
        case DDI_DMA_MAPPED:
                acmd->cmd_nwin = 1;
                acmd->cmd_dma_len = 0;
                acmd->cmd_dma_offset = 0;

get_dma_cookies:
                i = 0;
                acmd->cmd_dmacount = 0;
                for (;;) {
                        acmd->cmd_dmacount +=
                            acmd->cmd_dmacookies[i++].dmac_size;

                        if (i == instance->max_num_sge ||
                            i == acmd->cmd_ncookies)
                                break;

                        ddi_dma_nextcookie(acmd->cmd_dmahandle,
                            &acmd->cmd_dmacookies[i]);
                }

                acmd->cmd_cookie = i;
                acmd->cmd_cookiecnt = i;

                acmd->cmd_flags |= CFLAG_DMAVALID;

                if (bp->b_bcount >= acmd->cmd_dmacount) {
                        pkt->pkt_resid = bp->b_bcount - acmd->cmd_dmacount;
                } else {
                        pkt->pkt_resid = 0;
                }

                return (0);
        case DDI_DMA_NORESOURCES:
                bioerror(bp, 0);
                break;
        case DDI_DMA_NOMAPPING:
                bioerror(bp, EFAULT);
                break;
        case DDI_DMA_TOOBIG:
                bioerror(bp, EINVAL);
                break;
        case DDI_DMA_INUSE:
                con_log(CL_ANN, (CE_PANIC, "ddi_dma_buf_bind_handle:"
                    " DDI_DMA_INUSE impossible\n"));
                break;
        default:
                con_log(CL_ANN, (CE_PANIC, "ddi_dma_buf_bind_handle: "
                    "0x%x impossible\n", i));
                break;
        }

no_dma_cookies:
        ddi_dma_free_handle(&acmd->cmd_dmahandle);
        acmd->cmd_dmahandle = NULL;
        acmd->cmd_flags &= ~CFLAG_DMAVALID;
        return (-1);
}

/*
 * megasas_dma_move(struct megasas_instance *, struct scsi_pkt *, struct buf *)
 *
 * move dma resources to next dma window
 *
 */
static int
megasas_dma_move(struct megasas_instance *instance, struct scsi_pkt *pkt,
    struct buf *bp)
{
        int     i = 0;

        struct scsa_cmd *acmd = PKT2CMD(pkt);

        /*
         * If there are no more cookies remaining in this window,
         * must move to the next window first.
         */
        if (acmd->cmd_cookie == acmd->cmd_ncookies) {
                if (acmd->cmd_curwin == acmd->cmd_nwin && acmd->cmd_nwin == 1) {
                        return (0);
                }

                /* at last window, cannot move */
                if (++acmd->cmd_curwin >= acmd->cmd_nwin) {
                        return (-1);
                }

                if (ddi_dma_getwin(acmd->cmd_dmahandle, acmd->cmd_curwin,
                    &acmd->cmd_dma_offset, &acmd->cmd_dma_len,
                    &acmd->cmd_dmacookies[0], &acmd->cmd_ncookies) ==
                    DDI_FAILURE) {
                        return (-1);
                }

                acmd->cmd_cookie = 0;
        } else {
                /* still more cookies in this window - get the next one */
                ddi_dma_nextcookie(acmd->cmd_dmahandle,
                    &acmd->cmd_dmacookies[0]);
        }

        /* get remaining cookies in this window, up to our maximum */
        for (;;) {
                acmd->cmd_dmacount += acmd->cmd_dmacookies[i++].dmac_size;
                acmd->cmd_cookie++;

                if (i == instance->max_num_sge ||
                    acmd->cmd_cookie == acmd->cmd_ncookies) {
                        break;
                }

                ddi_dma_nextcookie(acmd->cmd_dmahandle,
                    &acmd->cmd_dmacookies[i]);
        }

        acmd->cmd_cookiecnt = i;

        if (bp->b_bcount >= acmd->cmd_dmacount) {
                pkt->pkt_resid = bp->b_bcount - acmd->cmd_dmacount;
        } else {
                pkt->pkt_resid = 0;
        }

        return (0);
}

/*
 * build_cmd
 */
static struct megasas_cmd *
build_cmd(struct megasas_instance *instance, struct scsi_address *ap,
    struct scsi_pkt *pkt, uchar_t *cmd_done)
{
        uint16_t        flags = 0;
        uint32_t        i;
        uint32_t        sge_bytes;

        struct megasas_cmd              *cmd;
        struct megasas_sge64            *mfi_sgl;
        struct scsa_cmd                 *acmd = PKT2CMD(pkt);
        struct megasas_pthru_frame      *pthru;
        struct megasas_io_frame         *ldio;

        /* find out if this is logical or physical drive command.  */
        acmd->islogical = MEGADRV_IS_LOGICAL(ap);
        acmd->device_id = MAP_DEVICE_ID(instance, ap);
        *cmd_done = 0;

        /* get the command packet */
        if (!(cmd = get_mfi_pkt(instance))) {
                return (NULL);
        }

        cmd->pkt = pkt;
        cmd->cmd = acmd;

        /* lets get the command directions */
        if (acmd->cmd_flags & CFLAG_DMASEND) {
                flags = MFI_FRAME_DIR_WRITE;

                if (acmd->cmd_flags & CFLAG_CONSISTENT) {
                        (void) ddi_dma_sync(acmd->cmd_dmahandle,
                            acmd->cmd_dma_offset, acmd->cmd_dma_len,
                            DDI_DMA_SYNC_FORDEV);
                }
        } else if (acmd->cmd_flags & ~CFLAG_DMASEND) {
                flags = MFI_FRAME_DIR_READ;

                if (acmd->cmd_flags & CFLAG_CONSISTENT) {
                        (void) ddi_dma_sync(acmd->cmd_dmahandle,
                            acmd->cmd_dma_offset, acmd->cmd_dma_len,
                            DDI_DMA_SYNC_FORCPU);
                }
        } else {
                flags = MFI_FRAME_DIR_NONE;
        }

        flags |= MFI_FRAME_SGL64;

        switch (pkt->pkt_cdbp[0]) {

        /*
         * case SCMD_SYNCHRONIZE_CACHE:
         *      flush_cache(instance);
         *      return_mfi_pkt(instance, cmd);
         *      *cmd_done = 1;
         *
         *      return (NULL);
         */

        case SCMD_READ:
        case SCMD_WRITE:
        case SCMD_READ_G1:
        case SCMD_WRITE_G1:
                if (acmd->islogical) {
                        ldio = (struct megasas_io_frame *)cmd->frame;

                        /*
                         * preare the Logical IO frame:
                         * 2nd bit is zero for all read cmds
                         */
                        ldio->cmd = (pkt->pkt_cdbp[0] & 0x02) ?
                            MFI_CMD_OP_LD_WRITE : MFI_CMD_OP_LD_READ;
                        ldio->cmd_status = 0x0;
                        ldio->scsi_status = 0x0;
                        ldio->target_id  = acmd->device_id;
                        ldio->timeout = 0;
                        ldio->reserved_0 = 0;
                        ldio->pad_0 = 0;
                        ldio->flags = flags;

                        /* Initialize sense Information */
                        bzero(cmd->sense, SENSE_LENGTH);
                        ldio->sense_len = SENSE_LENGTH;
                        ldio->sense_buf_phys_addr_hi = 0;
                        ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;

                        ldio->start_lba_hi = 0;
                        ldio->access_byte = (acmd->cmd_cdblen != 6) ?
                            pkt->pkt_cdbp[1] : 0;
                        ldio->sge_count = acmd->cmd_cookiecnt;
                        mfi_sgl = (struct megasas_sge64 *)&ldio->sgl;

                        if (acmd->cmd_cdblen == CDB_GROUP0) {
                                ldio->lba_count = host_to_le16(
                                    (uint16_t)(pkt->pkt_cdbp[4]));

                                ldio->start_lba_lo = host_to_le32(
                                    ((uint32_t)(pkt->pkt_cdbp[3])) |
                                    ((uint32_t)(pkt->pkt_cdbp[2]) << 8) |
                                    ((uint32_t)((pkt->pkt_cdbp[1]) & 0x1F)
                                    << 16));
                        } else if (acmd->cmd_cdblen == CDB_GROUP1) {
                                ldio->lba_count = host_to_le16(
                                    ((uint16_t)(pkt->pkt_cdbp[8])) |
                                    ((uint16_t)(pkt->pkt_cdbp[7]) << 8));

                                ldio->start_lba_lo = host_to_le32(
                                    ((uint32_t)(pkt->pkt_cdbp[5])) |
                                    ((uint32_t)(pkt->pkt_cdbp[4]) << 8) |
                                    ((uint32_t)(pkt->pkt_cdbp[3]) << 16) |
                                    ((uint32_t)(pkt->pkt_cdbp[2]) << 24));
                        } else if (acmd->cmd_cdblen == CDB_GROUP2) {
                                ldio->lba_count  = host_to_le16(
                                    ((uint16_t)(pkt->pkt_cdbp[9])) |
                                    ((uint16_t)(pkt->pkt_cdbp[8]) << 8) |
                                    ((uint16_t)(pkt->pkt_cdbp[7]) << 16) |
                                    ((uint16_t)(pkt->pkt_cdbp[6]) << 24));

                                ldio->start_lba_lo = host_to_le32(
                                    ((uint32_t)(pkt->pkt_cdbp[5])) |
                                    ((uint32_t)(pkt->pkt_cdbp[4]) << 8) |
                                    ((uint32_t)(pkt->pkt_cdbp[3]) << 16) |
                                    ((uint32_t)(pkt->pkt_cdbp[2]) << 24));
                        } else if (acmd->cmd_cdblen == CDB_GROUP3) {
                                ldio->lba_count = host_to_le16(
                                    ((uint16_t)(pkt->pkt_cdbp[13])) |
                                    ((uint16_t)(pkt->pkt_cdbp[12]) << 8) |
                                    ((uint16_t)(pkt->pkt_cdbp[11]) << 16) |
                                    ((uint16_t)(pkt->pkt_cdbp[10]) << 24));

                                ldio->start_lba_lo = host_to_le32(
                                    ((uint32_t)(pkt->pkt_cdbp[9])) |
                                    ((uint32_t)(pkt->pkt_cdbp[8]) << 8) |
                                    ((uint32_t)(pkt->pkt_cdbp[7]) << 16) |
                                    ((uint32_t)(pkt->pkt_cdbp[6]) << 24));

                                ldio->start_lba_lo = host_to_le32(
                                    ((uint32_t)(pkt->pkt_cdbp[5])) |
                                    ((uint32_t)(pkt->pkt_cdbp[4]) << 8) |
                                    ((uint32_t)(pkt->pkt_cdbp[3]) << 16) |
                                    ((uint32_t)(pkt->pkt_cdbp[2]) << 24));
                        }

                        break;
                }
                /* For all non-rd/wr cmds */
                /* FALLTHROUGH */
        default:
                pthru   = (struct megasas_pthru_frame *)cmd->frame;

                /* prepare the DCDB frame */
                pthru->cmd = (acmd->islogical) ?
                    MFI_CMD_OP_LD_SCSI : MFI_CMD_OP_PD_SCSI;
                pthru->cmd_status       = 0x0;
                pthru->scsi_status      = 0x0;
                pthru->target_id        = acmd->device_id;
                pthru->lun              = 0;
                pthru->cdb_len          = acmd->cmd_cdblen;
                pthru->timeout          = 0;
                pthru->flags            = flags;
                pthru->data_xfer_len    = acmd->cmd_dmacount;
                pthru->sge_count        = acmd->cmd_cookiecnt;
                mfi_sgl                 = (struct megasas_sge64 *)&pthru->sgl;

                bzero(cmd->sense, SENSE_LENGTH);
                pthru->sense_len        = SENSE_LENGTH;
                pthru->sense_buf_phys_addr_hi = 0;
                pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;

                bcopy(pkt->pkt_cdbp, pthru->cdb, acmd->cmd_cdblen);

                break;
        }
        /* bzero(mfi_sgl, sizeof (struct megasas_sge64) * MAX_SGL); */

        /* prepare the scatter-gather list for the firmware */
        for (i = 0; i < acmd->cmd_cookiecnt; i++, mfi_sgl++) {
                mfi_sgl->phys_addr = acmd->cmd_dmacookies[i].dmac_laddress;
                mfi_sgl->length    = acmd->cmd_dmacookies[i].dmac_size;
        }

        sge_bytes = sizeof (struct megasas_sge64)*acmd->cmd_cookiecnt;

        cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
            ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;

        if (cmd->frame_count >= 8) {
                cmd->frame_count = 8;
        }

        return (cmd);
}

/*
 * wait_for_outstanding -       Wait for all outstanding cmds
 * @instance:                           Adapter soft state
 *
 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
 * complete all its outstanding commands. Returns error if one or more IOs
 * are pending after this time period.
 */
static int
wait_for_outstanding(struct megasas_instance *instance)
{
        int             i;
        uint32_t        wait_time = 90;

        for (i = 0; i < wait_time; i++) {
                if (!instance->fw_outstanding) {
                        break;
                }

                drv_usecwait(MILLISEC); /* wait for 1000 usecs */;
        }

        if (instance->fw_outstanding) {
                return (1);
        }

        ddi_fm_acc_err_clear(instance->regmap_handle, DDI_FME_VERSION);

        return (0);
}

/*
 * issue_mfi_pthru
 */
static int
issue_mfi_pthru(struct megasas_instance *instance, struct megasas_ioctl *ioctl,
    struct megasas_cmd *cmd, int mode)
{
        void            *ubuf;
        uint32_t        kphys_addr = 0;
        uint32_t        xferlen = 0;
        uint_t          model;

        dma_obj_t                       pthru_dma_obj;
        struct megasas_pthru_frame      *kpthru;
        struct megasas_pthru_frame      *pthru;

        pthru = &cmd->frame->pthru;
        kpthru = (struct megasas_pthru_frame *)&ioctl->frame[0];

        model = ddi_model_convert_from(mode & FMODELS);
        if (model == DDI_MODEL_ILP32) {
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_pthru: DDI_MODEL_LP32"));

                xferlen = kpthru->sgl.sge32[0].length;

                /* SJ! - ubuf needs to be virtual address. */
                ubuf    = (void *)(ulong_t)kpthru->sgl.sge32[0].phys_addr;
        } else {
#ifdef _ILP32
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_pthru: DDI_MODEL_LP32"));
                xferlen = kpthru->sgl.sge32[0].length;
                /* SJ! - ubuf needs to be virtual address. */
                ubuf    = (void *)(ulong_t)kpthru->sgl.sge32[0].phys_addr;
#else
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_pthru: DDI_MODEL_LP64"));
                xferlen = kpthru->sgl.sge64[0].length;
                /* SJ! - ubuf needs to be virtual address. */
                ubuf    = (void *)(ulong_t)kpthru->sgl.sge64[0].phys_addr;
#endif
        }

        if (xferlen) {
                /* means IOCTL requires DMA */
                /* allocate the data transfer buffer */
                pthru_dma_obj.size = xferlen;
                pthru_dma_obj.dma_attr = megasas_generic_dma_attr;
                pthru_dma_obj.dma_attr.dma_attr_addr_hi = 0xFFFFFFFFU;
                pthru_dma_obj.dma_attr.dma_attr_count_max = 0xFFFFFFFFU;
                pthru_dma_obj.dma_attr.dma_attr_sgllen = 1;
                pthru_dma_obj.dma_attr.dma_attr_align = 1;

                /* allocate kernel buffer for DMA */
                if (mega_alloc_dma_obj(instance, &pthru_dma_obj) != 1) {
                        con_log(CL_ANN, (CE_WARN, "issue_mfi_pthru: "
                            "could not data transfer buffer alloc."));
                        return (DDI_FAILURE);
                }

                /* If IOCTL requires DMA WRITE, do ddi_copyin IOCTL data copy */
                if (kpthru->flags & MFI_FRAME_DIR_WRITE) {
                        if (ddi_copyin(ubuf, (void *)pthru_dma_obj.buffer,
                            xferlen, mode)) {
                                con_log(CL_ANN, (CE_WARN, "issue_mfi_pthru: "
                                    "copy from user space failed\n"));
                                return (1);
                        }
                }

                kphys_addr = pthru_dma_obj.dma_cookie[0].dmac_address;
        }

        pthru->cmd              = kpthru->cmd;
        pthru->sense_len        = kpthru->sense_len;
        pthru->cmd_status       = kpthru->cmd_status;
        pthru->scsi_status      = kpthru->scsi_status;
        pthru->target_id        = kpthru->target_id;
        pthru->lun              = kpthru->lun;
        pthru->cdb_len          = kpthru->cdb_len;
        pthru->sge_count        = kpthru->sge_count;
        pthru->timeout          = kpthru->timeout;
        pthru->data_xfer_len    = kpthru->data_xfer_len;

        pthru->sense_buf_phys_addr_hi   = 0;
        /* pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr; */
        pthru->sense_buf_phys_addr_lo   = 0;

        bcopy((void *)kpthru->cdb, (void *)pthru->cdb, pthru->cdb_len);

        pthru->flags                    = kpthru->flags & ~MFI_FRAME_SGL64;
        pthru->sgl.sge32[0].length      = xferlen;
        pthru->sgl.sge32[0].phys_addr   = kphys_addr;

        cmd->sync_cmd = MEGASAS_TRUE;
        cmd->frame_count = 1;

        if (instance->func_ptr->issue_cmd_in_sync_mode(instance, cmd)) {
                con_log(CL_ANN, (CE_WARN,
                    "issue_mfi_pthru: fw_ioctl failed\n"));
        } else {
                if (xferlen && (kpthru->flags & MFI_FRAME_DIR_READ)) {

                        if (ddi_copyout(pthru_dma_obj.buffer, ubuf,
                            xferlen, mode)) {
                                con_log(CL_ANN, (CE_WARN, "issue_mfi_pthru: "
                                    "copy to user space failed\n"));
                                return (1);
                        }
                }
        }

        kpthru->cmd_status = pthru->cmd_status;
        kpthru->scsi_status = pthru->scsi_status;

        con_log(CL_ANN, (CE_NOTE, "issue_mfi_pthru: cmd_status %x, "
            "scsi_status %x\n", pthru->cmd_status, pthru->scsi_status));

        if (xferlen) {
                /* free kernel buffer */
                if (mega_free_dma_obj(instance, pthru_dma_obj) != DDI_SUCCESS)
                        return (1);
        }

        return (0);
}

/*
 * issue_mfi_dcmd
 */
static int
issue_mfi_dcmd(struct megasas_instance *instance, struct megasas_ioctl *ioctl,
    struct megasas_cmd *cmd, int mode)
{
        void            *ubuf;
        uint32_t        kphys_addr = 0;
        uint32_t        xferlen = 0;
        uint32_t        model;
        dma_obj_t                       dcmd_dma_obj;
        struct megasas_dcmd_frame       *kdcmd;
        struct megasas_dcmd_frame       *dcmd;

        dcmd = &cmd->frame->dcmd;
        kdcmd = (struct megasas_dcmd_frame *)&ioctl->frame[0];

        model = ddi_model_convert_from(mode & FMODELS);
        if (model == DDI_MODEL_ILP32) {
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_dcmd: DDI_MODEL_ILP32"));

                xferlen = kdcmd->sgl.sge32[0].length;

                /* SJ! - ubuf needs to be virtual address. */
                ubuf    = (void *)(ulong_t)kdcmd->sgl.sge32[0].phys_addr;
        }
        else
        {
#ifdef _ILP32
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_dcmd: DDI_MODEL_ILP32"));
                xferlen = kdcmd->sgl.sge32[0].length;
                /* SJ! - ubuf needs to be virtual address. */
                ubuf    = (void *)(ulong_t)kdcmd->sgl.sge32[0].phys_addr;
#else
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_dcmd: DDI_MODEL_LP64"));
                xferlen = kdcmd->sgl.sge64[0].length;
                /* SJ! - ubuf needs to be virtual address. */
                ubuf    = (void *)(ulong_t)dcmd->sgl.sge64[0].phys_addr;
#endif
        }
        if (xferlen) {
                /* means IOCTL requires DMA */
                /* allocate the data transfer buffer */
                dcmd_dma_obj.size = xferlen;
                dcmd_dma_obj.dma_attr = megasas_generic_dma_attr;
                dcmd_dma_obj.dma_attr.dma_attr_addr_hi = 0xFFFFFFFFU;
                dcmd_dma_obj.dma_attr.dma_attr_count_max = 0xFFFFFFFFU;
                dcmd_dma_obj.dma_attr.dma_attr_sgllen = 1;
                dcmd_dma_obj.dma_attr.dma_attr_align = 1;

                /* allocate kernel buffer for DMA */
                if (mega_alloc_dma_obj(instance, &dcmd_dma_obj) != 1) {
                        con_log(CL_ANN, (CE_WARN, "issue_mfi_dcmd: "
                            "could not data transfer buffer alloc."));
                        return (DDI_FAILURE);
                }

                /* If IOCTL requires DMA WRITE, do ddi_copyin IOCTL data copy */
                if (kdcmd->flags & MFI_FRAME_DIR_WRITE) {
                        if (ddi_copyin(ubuf, (void *)dcmd_dma_obj.buffer,
                            xferlen, mode)) {
                                con_log(CL_ANN, (CE_WARN, "issue_mfi_dcmd: "
                                    "copy from user space failed\n"));
                                return (1);
                        }
                }

                kphys_addr = dcmd_dma_obj.dma_cookie[0].dmac_address;
        }

        dcmd->cmd               = kdcmd->cmd;
        dcmd->cmd_status        = kdcmd->cmd_status;
        dcmd->sge_count         = kdcmd->sge_count;
        dcmd->timeout           = kdcmd->timeout;
        dcmd->data_xfer_len     = kdcmd->data_xfer_len;
        dcmd->opcode            = kdcmd->opcode;

        bcopy((void *)kdcmd->mbox.b, (void *)dcmd->mbox.b, DCMD_MBOX_SZ);

        dcmd->flags                     = kdcmd->flags & ~MFI_FRAME_SGL64;
        dcmd->sgl.sge32[0].length       = xferlen;
        dcmd->sgl.sge32[0].phys_addr    = kphys_addr;

        cmd->sync_cmd = MEGASAS_TRUE;
        cmd->frame_count = 1;

        if (instance->func_ptr->issue_cmd_in_sync_mode(instance, cmd)) {
                con_log(CL_ANN, (CE_WARN, "issue_mfi_dcmd: fw_ioctl failed\n"));
        } else {
                if (xferlen && (kdcmd->flags & MFI_FRAME_DIR_READ)) {

                        if (ddi_copyout(dcmd_dma_obj.buffer, ubuf,
                            xferlen, mode)) {
                                con_log(CL_ANN, (CE_WARN, "issue_mfi_dcmd: "
                                    "copy to user space failed\n"));
                                return (1);
                        }
                }
        }

        kdcmd->cmd_status = dcmd->cmd_status;

        if (xferlen) {
                /* free kernel buffer */
                if (mega_free_dma_obj(instance, dcmd_dma_obj) != DDI_SUCCESS)
                        return (1);
        }

        return (0);
}

/*
 * issue_mfi_smp
 */
static int
issue_mfi_smp(struct megasas_instance *instance, struct megasas_ioctl *ioctl,
    struct megasas_cmd *cmd, int mode)
{
        void            *request_ubuf;
        void            *response_ubuf;
        uint32_t        request_xferlen = 0;
        uint32_t        response_xferlen = 0;
        uint_t          model;
        dma_obj_t                       request_dma_obj;
        dma_obj_t                       response_dma_obj;
        struct megasas_smp_frame        *ksmp;
        struct megasas_smp_frame        *smp;
        struct megasas_sge32            *sge32;
#ifndef _ILP32
        struct megasas_sge64            *sge64;
#endif

        smp = &cmd->frame->smp;
        ksmp = (struct megasas_smp_frame *)&ioctl->frame[0];

        model = ddi_model_convert_from(mode & FMODELS);
        if (model == DDI_MODEL_ILP32) {
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_smp: DDI_MODEL_ILP32"));

                sge32                   = &ksmp->sgl[0].sge32[0];
                response_xferlen        = sge32[0].length;
                request_xferlen         = sge32[1].length;
                con_log(CL_ANN, (CE_NOTE, "issue_mfi_smp: "
                    "response_xferlen = %x, request_xferlen = %x",
                    response_xferlen, request_xferlen));

                /* SJ! - ubuf needs to be virtual address. */

                response_ubuf   = (void *)(ulong_t)sge32[0].phys_addr;
                request_ubuf    = (void *)(ulong_t)sge32[1].phys_addr;
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_smp: "
                    "response_ubuf = %p, request_ubuf = %p",
                    response_ubuf, request_ubuf));
        } else {
#ifdef _ILP32
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_smp: DDI_MODEL_ILP32"));

                sge32                   = &ksmp->sgl[0].sge32[0];
                response_xferlen        = sge32[0].length;
                request_xferlen         = sge32[1].length;
                con_log(CL_ANN, (CE_NOTE, "issue_mfi_smp: "
                    "response_xferlen = %x, request_xferlen = %x",
                    response_xferlen, request_xferlen));

                /* SJ! - ubuf needs to be virtual address. */

                response_ubuf   = (void *)(ulong_t)sge32[0].phys_addr;
                request_ubuf    = (void *)(ulong_t)sge32[1].phys_addr;
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_smp: "
                    "response_ubuf = %p, request_ubuf = %p",
                    response_ubuf, request_ubuf));
#else
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_smp: DDI_MODEL_LP64"));

                sge64                   = &ksmp->sgl[0].sge64[0];
                response_xferlen        = sge64[0].length;
                request_xferlen         = sge64[1].length;

                /* SJ! - ubuf needs to be virtual address. */
                response_ubuf   = (void *)(ulong_t)sge64[0].phys_addr;
                request_ubuf    = (void *)(ulong_t)sge64[1].phys_addr;
#endif
        }
        if (request_xferlen) {
                /* means IOCTL requires DMA */
                /* allocate the data transfer buffer */
                request_dma_obj.size = request_xferlen;
                request_dma_obj.dma_attr = megasas_generic_dma_attr;
                request_dma_obj.dma_attr.dma_attr_addr_hi = 0xFFFFFFFFU;
                request_dma_obj.dma_attr.dma_attr_count_max = 0xFFFFFFFFU;
                request_dma_obj.dma_attr.dma_attr_sgllen = 1;
                request_dma_obj.dma_attr.dma_attr_align = 1;

                /* allocate kernel buffer for DMA */
                if (mega_alloc_dma_obj(instance, &request_dma_obj) != 1) {
                        con_log(CL_ANN, (CE_WARN, "issue_mfi_smp: "
                            "could not data transfer buffer alloc."));
                        return (DDI_FAILURE);
                }

                /* If IOCTL requires DMA WRITE, do ddi_copyin IOCTL data copy */
                if (ddi_copyin(request_ubuf, (void *) request_dma_obj.buffer,
                    request_xferlen, mode)) {
                        con_log(CL_ANN, (CE_WARN, "issue_mfi_smp: "
                            "copy from user space failed\n"));
                        return (1);
                }
        }

        if (response_xferlen) {
                /* means IOCTL requires DMA */
                /* allocate the data transfer buffer */
                response_dma_obj.size = response_xferlen;
                response_dma_obj.dma_attr = megasas_generic_dma_attr;
                response_dma_obj.dma_attr.dma_attr_addr_hi = 0xFFFFFFFFU;
                response_dma_obj.dma_attr.dma_attr_count_max = 0xFFFFFFFFU;
                response_dma_obj.dma_attr.dma_attr_sgllen = 1;
                response_dma_obj.dma_attr.dma_attr_align = 1;

                /* allocate kernel buffer for DMA */
                if (mega_alloc_dma_obj(instance, &response_dma_obj) != 1) {
                        con_log(CL_ANN, (CE_WARN, "issue_mfi_smp: "
                            "could not data transfer buffer alloc."));
                        return (DDI_FAILURE);
                }

                /* If IOCTL requires DMA WRITE, do ddi_copyin IOCTL data copy */
                if (ddi_copyin(response_ubuf, (void *) response_dma_obj.buffer,
                    response_xferlen, mode)) {
                        con_log(CL_ANN, (CE_WARN, "issue_mfi_smp: "
                            "copy from user space failed\n"));
                        return (1);
                }
        }

        smp->cmd                = ksmp->cmd;
        smp->cmd_status         = ksmp->cmd_status;
        smp->connection_status  = ksmp->connection_status;
        smp->sge_count          = ksmp->sge_count;
        /* smp->context         = ksmp->context; */
        smp->timeout            = ksmp->timeout;
        smp->data_xfer_len      = ksmp->data_xfer_len;

        bcopy((void *)&ksmp->sas_addr, (void *)&smp->sas_addr,
            sizeof (uint64_t));

        smp->flags              = ksmp->flags & ~MFI_FRAME_SGL64;

        model = ddi_model_convert_from(mode & FMODELS);
        if (model == DDI_MODEL_ILP32) {
                con_log(CL_ANN1, (CE_NOTE,
                    "handle_drv_ioctl: DDI_MODEL_ILP32"));

                sge32 = &smp->sgl[0].sge32[0];
                sge32[0].length = response_xferlen;
                sge32[0].phys_addr =
                    response_dma_obj.dma_cookie[0].dmac_address;
                sge32[1].length = request_xferlen;
                sge32[1].phys_addr =
                    request_dma_obj.dma_cookie[0].dmac_address;
        } else {
#ifdef _ILP32
                con_log(CL_ANN1, (CE_NOTE,
                    "handle_drv_ioctl: DDI_MODEL_ILP32"));
                sge32 = &smp->sgl[0].sge32[0];
                sge32[0].length  = response_xferlen;
                sge32[0].phys_addr =
                    response_dma_obj.dma_cookie[0].dmac_address;
                sge32[1].length = request_xferlen;
                sge32[1].phys_addr =
                    request_dma_obj.dma_cookie[0].dmac_address;
#else
                con_log(CL_ANN1, (CE_NOTE,
                    "issue_mfi_smp: DDI_MODEL_LP64"));
                sge64 = &smp->sgl[0].sge64[0];
                sge64[0].length = response_xferlen;
                sge64[0].phys_addr =
                    response_dma_obj.dma_cookie[0].dmac_address;
                sge64[1].length = request_xferlen;
                sge64[1].phys_addr =
                    request_dma_obj.dma_cookie[0].dmac_address;
#endif
        }
        con_log(CL_ANN1, (CE_NOTE, "issue_mfi_smp: "
            "smp->response_xferlen = %d, smp->request_xferlen = %d "
            "smp->data_xfer_len = %d", sge32[0].length, sge32[1].length,
            smp->data_xfer_len));

        cmd->sync_cmd = MEGASAS_TRUE;
        cmd->frame_count = 1;

        if (instance->func_ptr->issue_cmd_in_sync_mode(instance, cmd)) {
                con_log(CL_ANN, (CE_WARN,
                    "issue_mfi_smp: fw_ioctl failed\n"));
        } else {
                con_log(CL_ANN1, (CE_NOTE,
                    "issue_mfi_smp: copy to user space\n"));

                if (request_xferlen) {
                        if (ddi_copyout(request_dma_obj.buffer, request_ubuf,
                            request_xferlen, mode)) {
                                con_log(CL_ANN, (CE_WARN, "issue_mfi_smp: "
                                    "copy to user space failed\n"));
                                return (1);
                        }
                }

                if (response_xferlen) {
                        if (ddi_copyout(response_dma_obj.buffer, response_ubuf,
                            response_xferlen, mode)) {
                                con_log(CL_ANN, (CE_WARN, "issue_mfi_smp: "
                                    "copy to user space failed\n"));
                                return (1);
                        }
                }
        }

        ksmp->cmd_status = smp->cmd_status;
        con_log(CL_ANN1, (CE_NOTE, "issue_mfi_smp: smp->cmd_status = %d",
            smp->cmd_status));


        if (request_xferlen) {
                /* free kernel buffer */
                if (mega_free_dma_obj(instance, request_dma_obj) != DDI_SUCCESS)
                        return (1);
        }

        if (response_xferlen) {
                /* free kernel buffer */
                if (mega_free_dma_obj(instance, response_dma_obj) !=
                    DDI_SUCCESS)
                        return (1);
        }

        return (0);
}

/*
 * issue_mfi_stp
 */
static int
issue_mfi_stp(struct megasas_instance *instance, struct megasas_ioctl *ioctl,
    struct megasas_cmd *cmd, int mode)
{
        void            *fis_ubuf;
        void            *data_ubuf;
        uint32_t        fis_xferlen = 0;
        uint32_t        data_xferlen = 0;
        uint_t          model;
        dma_obj_t                       fis_dma_obj;
        dma_obj_t                       data_dma_obj;
        struct megasas_stp_frame        *kstp;
        struct megasas_stp_frame        *stp;

        stp = &cmd->frame->stp;
        kstp = (struct megasas_stp_frame *)&ioctl->frame[0];

        model = ddi_model_convert_from(mode & FMODELS);
        if (model == DDI_MODEL_ILP32) {
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_stp: DDI_MODEL_ILP32"));

                fis_xferlen     = kstp->sgl.sge32[0].length;
                data_xferlen    = kstp->sgl.sge32[1].length;

                /* SJ! - ubuf needs to be virtual address. */
                fis_ubuf        = (void *)(ulong_t)kstp->sgl.sge32[0].phys_addr;
                data_ubuf       = (void *)(ulong_t)kstp->sgl.sge32[1].phys_addr;
        }
        else
        {
#ifdef _ILP32
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_stp: DDI_MODEL_ILP32"));

                fis_xferlen     = kstp->sgl.sge32[0].length;
                data_xferlen    = kstp->sgl.sge32[1].length;

                /* SJ! - ubuf needs to be virtual address. */
                fis_ubuf        = (void *)(ulong_t)kstp->sgl.sge32[0].phys_addr;
                data_ubuf       = (void *)(ulong_t)kstp->sgl.sge32[1].phys_addr;
#else
                con_log(CL_ANN1, (CE_NOTE, "issue_mfi_stp: DDI_MODEL_LP64"));

                fis_xferlen     = kstp->sgl.sge64[0].length;
                data_xferlen    = kstp->sgl.sge64[1].length;

                /* SJ! - ubuf needs to be virtual address. */
                fis_ubuf        = (void *)(ulong_t)kstp->sgl.sge64[0].phys_addr;
                data_ubuf       = (void *)(ulong_t)kstp->sgl.sge64[1].phys_addr;
#endif
        }


        if (fis_xferlen) {
                con_log(CL_ANN, (CE_NOTE, "issue_mfi_stp: "
                    "fis_ubuf = %p fis_xferlen = %x", fis_ubuf, fis_xferlen));

                /* means IOCTL requires DMA */
                /* allocate the data transfer buffer */
                fis_dma_obj.size = fis_xferlen;
                fis_dma_obj.dma_attr = megasas_generic_dma_attr;
                fis_dma_obj.dma_attr.dma_attr_addr_hi = 0xFFFFFFFFU;
                fis_dma_obj.dma_attr.dma_attr_count_max = 0xFFFFFFFFU;
                fis_dma_obj.dma_attr.dma_attr_sgllen = 1;
                fis_dma_obj.dma_attr.dma_attr_align = 1;

                /* allocate kernel buffer for DMA */
                if (mega_alloc_dma_obj(instance, &fis_dma_obj) != 1) {
                        con_log(CL_ANN, (CE_WARN, "issue_mfi_stp: "
                            "could not data transfer buffer alloc."));
                        return (DDI_FAILURE);
                }

                /* If IOCTL requires DMA WRITE, do ddi_copyin IOCTL data copy */
                if (ddi_copyin(fis_ubuf, (void *)fis_dma_obj.buffer,
                    fis_xferlen, mode)) {
                        con_log(CL_ANN, (CE_WARN, "issue_mfi_stp: "
                            "copy from user space failed\n"));
                        return (1);
                }
        }

        if (data_xferlen) {
                con_log(CL_ANN, (CE_NOTE, "issue_mfi_stp: data_ubuf = %p "
                    "data_xferlen = %x", data_ubuf, data_xferlen));

                /* means IOCTL requires DMA */
                /* allocate the data transfer buffer */
                data_dma_obj.size = data_xferlen;
                data_dma_obj.dma_attr = megasas_generic_dma_attr;
                data_dma_obj.dma_attr.dma_attr_addr_hi = 0xFFFFFFFFU;
                data_dma_obj.dma_attr.dma_attr_count_max = 0xFFFFFFFFU;
                data_dma_obj.dma_attr.dma_attr_sgllen = 1;
                data_dma_obj.dma_attr.dma_attr_align = 1;

                /* allocate kernel buffer for DMA */
                if (mega_alloc_dma_obj(instance, &data_dma_obj) != 1) {
                        con_log(CL_ANN, (CE_WARN, "issue_mfi_stp: "
                            "could not data transfer buffer alloc."));
                        return (DDI_FAILURE);
                }

                /* If IOCTL requires DMA WRITE, do ddi_copyin IOCTL data copy */
                if (ddi_copyin(data_ubuf, (void *) data_dma_obj.buffer,
                    data_xferlen, mode)) {
                        con_log(CL_ANN, (CE_WARN, "issue_mfi_stp: "
                            "copy from user space failed\n"));
                        return (1);
                }
        }

        stp->cmd = kstp->cmd;
        stp->cmd_status = kstp->cmd_status;
        stp->connection_status = kstp->connection_status;
        stp->target_id = kstp->target_id;
        stp->sge_count = kstp->sge_count;
        /* stp->context = kstp->context; */
        stp->timeout = kstp->timeout;
        stp->data_xfer_len = kstp->data_xfer_len;

        bcopy((void *)kstp->fis, (void *)stp->fis, 10);

        stp->flags = kstp->flags & ~MFI_FRAME_SGL64;
        stp->stp_flags = kstp->stp_flags;
        stp->sgl.sge32[0].length = fis_xferlen;
        stp->sgl.sge32[0].phys_addr = fis_dma_obj.dma_cookie[0].dmac_address;
        stp->sgl.sge32[1].length = data_xferlen;
        stp->sgl.sge32[1].phys_addr = data_dma_obj.dma_cookie[0].dmac_address;

        cmd->sync_cmd = MEGASAS_TRUE;
        cmd->frame_count = 1;

        if (instance->func_ptr->issue_cmd_in_sync_mode(instance, cmd)) {
                con_log(CL_ANN, (CE_WARN, "issue_mfi_stp: fw_ioctl failed\n"));
        } else {

                if (fis_xferlen) {
                        if (ddi_copyout(fis_dma_obj.buffer, fis_ubuf,
                            fis_xferlen, mode)) {
                                con_log(CL_ANN, (CE_WARN, "issue_mfi_stp: "
                                    "copy to user space failed\n"));
                                return (1);
                        }
                }

                if (data_xferlen) {
                        if (ddi_copyout(data_dma_obj.buffer, data_ubuf,
                            data_xferlen, mode)) {
                                con_log(CL_ANN, (CE_WARN, "issue_mfi_stp: "
                                    "copy to user space failed\n"));
                                return (1);
                        }
                }
        }

        kstp->cmd_status = stp->cmd_status;

        if (fis_xferlen) {
                /* free kernel buffer */
                if (mega_free_dma_obj(instance, fis_dma_obj) != DDI_SUCCESS)
                        return (1);
        }

        if (data_xferlen) {
                /* free kernel buffer */
                if (mega_free_dma_obj(instance, data_dma_obj) != DDI_SUCCESS)
                        return (1);
        }

        return (0);
}

/*
 * fill_up_drv_ver
 */
static void
fill_up_drv_ver(struct megasas_drv_ver *dv)
{
        (void) memset(dv, 0, sizeof (struct megasas_drv_ver));

        (void) memcpy(dv->signature, "$LSI LOGIC$", strlen("$LSI LOGIC$"));
        (void) memcpy(dv->os_name, "Solaris", strlen("Solaris"));
        (void) memcpy(dv->drv_name, "megaraid_sas", strlen("megaraid_sas"));
        (void) memcpy(dv->drv_ver, MEGASAS_VERSION, strlen(MEGASAS_VERSION));
        (void) memcpy(dv->drv_rel_date, MEGASAS_RELDATE,
            strlen(MEGASAS_RELDATE));
}

/*
 * handle_drv_ioctl
 */
static int
handle_drv_ioctl(struct megasas_instance *instance, struct megasas_ioctl *ioctl,
    int mode)
{
        int     i;
        int     rval = 0;
        int     *props = NULL;
        void    *ubuf;

        uint8_t         *pci_conf_buf;
        uint32_t        xferlen;
        uint32_t        num_props;
        uint_t          model;
        struct megasas_dcmd_frame       *kdcmd;
        struct megasas_drv_ver          dv;
        struct megasas_pci_information  pi;

        kdcmd = (struct megasas_dcmd_frame *)&ioctl->frame[0];

        model = ddi_model_convert_from(mode & FMODELS);
        if (model == DDI_MODEL_ILP32) {
                con_log(CL_ANN1, (CE_NOTE,
                    "handle_drv_ioctl: DDI_MODEL_ILP32"));

                xferlen = kdcmd->sgl.sge32[0].length;

                /* SJ! - ubuf needs to be virtual address. */
                ubuf = (void *)(ulong_t)kdcmd->sgl.sge32[0].phys_addr;
        } else {
#ifdef _ILP32
                con_log(CL_ANN1, (CE_NOTE,
                    "handle_drv_ioctl: DDI_MODEL_ILP32"));
                xferlen = kdcmd->sgl.sge32[0].length;
                /* SJ! - ubuf needs to be virtual address. */
                ubuf = (void *)(ulong_t)kdcmd->sgl.sge32[0].phys_addr;
#else
                con_log(CL_ANN1, (CE_NOTE,
                    "handle_drv_ioctl: DDI_MODEL_LP64"));
                xferlen = kdcmd->sgl.sge64[0].length;
                /* SJ! - ubuf needs to be virtual address. */
                ubuf = (void *)(ulong_t)kdcmd->sgl.sge64[0].phys_addr;
#endif
        }
        con_log(CL_ANN1, (CE_NOTE, "handle_drv_ioctl: "
            "dataBuf=%p size=%d bytes", ubuf, xferlen));

        switch (kdcmd->opcode) {
        case MR_DRIVER_IOCTL_DRIVER_VERSION:
                con_log(CL_ANN1, (CE_NOTE, "handle_drv_ioctl: "
                    "MR_DRIVER_IOCTL_DRIVER_VERSION"));

                fill_up_drv_ver(&dv);

                if (ddi_copyout(&dv, ubuf, xferlen, mode)) {
                        con_log(CL_ANN, (CE_WARN, "handle_drv_ioctl: "
                            "MR_DRIVER_IOCTL_DRIVER_VERSION : "
                            "copy to user space failed\n"));
                        kdcmd->cmd_status = 1;
                        rval = 1;
                } else {
                        kdcmd->cmd_status = 0;
                }
                break;
        case MR_DRIVER_IOCTL_PCI_INFORMATION:
                con_log(CL_ANN1, (CE_NOTE, "handle_drv_ioctl: "
                    "MR_DRIVER_IOCTL_PCI_INFORMAITON"));

                if (ddi_prop_lookup_int_array(DDI_DEV_T_ANY, instance->dip,
                    0, "reg", &props, &num_props)) {
                        con_log(CL_ANN, (CE_WARN, "handle_drv_ioctl: "
                            "MR_DRIVER_IOCTL_PCI_INFORMATION : "
                            "ddi_prop_look_int_array failed\n"));
                        rval = 1;
                } else {

                        pi.busNumber = (props[0] >> 16) & 0xFF;
                        pi.deviceNumber = (props[0] >> 11) & 0x1f;
                        pi.functionNumber = (props[0] >> 8) & 0x7;
                        ddi_prop_free((void *)props);
                }

                pci_conf_buf = (uint8_t *)&pi.pciHeaderInfo;

                for (i = 0; i < (sizeof (struct megasas_pci_information) -
                    offsetof(struct megasas_pci_information, pciHeaderInfo));
                    i++) {
                        pci_conf_buf[i] =
                            pci_config_get8(instance->pci_handle, i);
                }

                if (ddi_copyout(&pi, ubuf, xferlen, mode)) {
                        con_log(CL_ANN, (CE_WARN, "handle_drv_ioctl: "
                            "MR_DRIVER_IOCTL_PCI_INFORMATION : "
                            "copy to user space failed\n"));
                        kdcmd->cmd_status = 1;
                        rval = 1;
                } else {
                        kdcmd->cmd_status = 0;
                }
                break;
        default:
                con_log(CL_ANN, (CE_WARN, "handle_drv_ioctl: "
                    "invalid driver specific IOCTL opcode = 0x%x",
                    kdcmd->opcode));
                kdcmd->cmd_status = 1;
                rval = 1;
                break;
        }

        return (rval);
}

/*
 * handle_mfi_ioctl
 */
static int
handle_mfi_ioctl(struct megasas_instance *instance, struct megasas_ioctl *ioctl,
    int mode)
{
        int     rval = 0;

        struct megasas_header   *hdr;
        struct megasas_cmd      *cmd;

        cmd = get_mfi_pkt(instance);

        if (!cmd) {
                con_log(CL_ANN, (CE_WARN, "megasas: "
                    "failed to get a cmd packet\n"));
                return (1);
        }

        hdr = (struct megasas_header *)&ioctl->frame[0];

        switch (hdr->cmd) {
        case MFI_CMD_OP_DCMD:
                rval = issue_mfi_dcmd(instance, ioctl, cmd, mode);
                break;
        case MFI_CMD_OP_SMP:
                rval = issue_mfi_smp(instance, ioctl, cmd, mode);
                break;
        case MFI_CMD_OP_STP:
                rval = issue_mfi_stp(instance, ioctl, cmd, mode);
                break;
        case MFI_CMD_OP_LD_SCSI:
        case MFI_CMD_OP_PD_SCSI:
                rval = issue_mfi_pthru(instance, ioctl, cmd, mode);
                break;
        default:
                con_log(CL_ANN, (CE_WARN, "handle_mfi_ioctl: "
                    "invalid mfi ioctl hdr->cmd = %d\n", hdr->cmd));
                rval = 1;
                break;
        }


        return_mfi_pkt(instance, cmd);
        if (megasas_common_check(instance, cmd) != DDI_SUCCESS)
                rval = 1;
        return (rval);
}

/*
 * AEN
 */
static int
handle_mfi_aen(struct megasas_instance *instance, struct megasas_aen *aen)
{
        int     rval = 0;

        rval = register_mfi_aen(instance, instance->aen_seq_num,
            aen->class_locale_word);

        aen->cmd_status = (uint8_t)rval;

        return (rval);
}

static int
register_mfi_aen(struct megasas_instance *instance, uint32_t seq_num,
    uint32_t class_locale_word)
{
        int     ret_val;

        struct megasas_cmd              *cmd;
        struct megasas_dcmd_frame       *dcmd;
        union megasas_evt_class_locale  curr_aen;
        union megasas_evt_class_locale  prev_aen;

        /*
         * If there an AEN pending already (aen_cmd), check if the
         * class_locale of that pending AEN is inclusive of the new
         * AEN request we currently have. If it is, then we don't have
         * to do anything. In other words, whichever events the current
         * AEN request is subscribing to, have already been subscribed
         * to.
         *
         * If the old_cmd is _not_ inclusive, then we have to abort
         * that command, form a class_locale that is superset of both
         * old and current and re-issue to the FW
         */

        curr_aen.word = class_locale_word;

        if (instance->aen_cmd) {
                prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];

                /*
                 * A class whose enum value is smaller is inclusive of all
                 * higher values. If a PROGRESS (= -1) was previously
                 * registered, then a new registration requests for higher
                 * classes need not be sent to FW. They are automatically
                 * included.
                 *
                 * Locale numbers don't have such hierarchy. They are bitmap
                 * values
                 */
                if ((prev_aen.members.class <= curr_aen.members.class) &&
                    !((prev_aen.members.locale & curr_aen.members.locale) ^
                    curr_aen.members.locale)) {
                        /*
                         * Previously issued event registration includes
                         * current request. Nothing to do.
                         */

                        return (0);
                } else {
                        curr_aen.members.locale |= prev_aen.members.locale;

                        if (prev_aen.members.class < curr_aen.members.class)
                                curr_aen.members.class = prev_aen.members.class;

                        ret_val = abort_aen_cmd(instance, instance->aen_cmd);

                        if (ret_val) {
                                con_log(CL_ANN, (CE_WARN, "register_mfi_aen: "
                                    "failed to abort prevous AEN command\n"));

                                return (ret_val);
                        }
                }
        } else {
                curr_aen.word = class_locale_word;
        }

        cmd = get_mfi_pkt(instance);

        if (!cmd)
                return (-ENOMEM);

        dcmd = &cmd->frame->dcmd;

        /* for(i = 0; i < DCMD_MBOX_SZ; i++) dcmd->mbox.b[i] = 0; */
        (void) memset(dcmd->mbox.b, 0, DCMD_MBOX_SZ);

        (void) memset(instance->mfi_evt_detail_obj.buffer, 0,
            sizeof (struct megasas_evt_detail));

        /* Prepare DCMD for aen registration */
        dcmd->cmd = MFI_CMD_OP_DCMD;
        dcmd->cmd_status = 0x0;
        dcmd->sge_count = 1;
        dcmd->flags = MFI_FRAME_DIR_READ;
        dcmd->timeout = 0;
        dcmd->data_xfer_len = sizeof (struct megasas_evt_detail);
        dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
        dcmd->mbox.w[0] = seq_num;
        dcmd->mbox.w[1] = curr_aen.word;
        dcmd->sgl.sge32[0].phys_addr =
            instance->mfi_evt_detail_obj.dma_cookie[0].dmac_address;
        dcmd->sgl.sge32[0].length = sizeof (struct megasas_evt_detail);

        instance->aen_seq_num = seq_num;

        /*
         * Store reference to the cmd used to register for AEN. When an
         * application wants us to register for AEN, we have to abort this
         * cmd and re-register with a new EVENT LOCALE supplied by that app
         */
        instance->aen_cmd = cmd;

        cmd->frame_count = 1;

        /* Issue the aen registration frame */
        /* atomic_add_16 (&instance->fw_outstanding, 1); */
        instance->func_ptr->issue_cmd(cmd, instance);

        return (0);
}

static void
display_scsi_inquiry(caddr_t scsi_inq)
{
#define MAX_SCSI_DEVICE_CODE    14
        int             i;
        char            inquiry_buf[256] = {0};
        int             len;
        const char      *const scsi_device_types[] = {
                "Direct-Access    ",
                "Sequential-Access",
                "Printer          ",
                "Processor        ",
                "WORM             ",
                "CD-ROM           ",
                "Scanner          ",
                "Optical Device   ",
                "Medium Changer   ",
                "Communications   ",
                "Unknown          ",
                "Unknown          ",
                "Unknown          ",
                "Enclosure        ",
        };

        len = 0;

        len += snprintf(inquiry_buf + len, 265 - len, "  Vendor: ");
        for (i = 8; i < 16; i++) {
                len += snprintf(inquiry_buf + len, 265 - len, "%c",
                    scsi_inq[i]);
        }

        len += snprintf(inquiry_buf + len, 265 - len, "  Model: ");

        for (i = 16; i < 32; i++) {
                len += snprintf(inquiry_buf + len, 265 - len, "%c",
                    scsi_inq[i]);
        }

        len += snprintf(inquiry_buf + len, 265 - len, "  Rev: ");

        for (i = 32; i < 36; i++) {
                len += snprintf(inquiry_buf + len, 265 - len, "%c",
                    scsi_inq[i]);
        }

        len += snprintf(inquiry_buf + len, 265 - len, "\n");


        i = scsi_inq[0] & 0x1f;


        len += snprintf(inquiry_buf + len, 265 - len, "  Type:   %s ",
            i < MAX_SCSI_DEVICE_CODE ? scsi_device_types[i] :
            "Unknown          ");


        len += snprintf(inquiry_buf + len, 265 - len,
            "                 ANSI SCSI revision: %02x", scsi_inq[2] & 0x07);

        if ((scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1) {
                len += snprintf(inquiry_buf + len, 265 - len, " CCS\n");
        } else {
                len += snprintf(inquiry_buf + len, 265 - len, "\n");
        }

        con_log(CL_ANN1, (CE_CONT, inquiry_buf));
}

static int
read_fw_status_reg_xscale(struct megasas_instance *instance)
{
        return ((int)RD_OB_MSG_0(instance));
}

static int
read_fw_status_reg_ppc(struct megasas_instance *instance)
{
        return ((int)RD_OB_SCRATCH_PAD_0(instance));
}

static void
issue_cmd_xscale(struct megasas_cmd *cmd, struct megasas_instance *instance)
{
        atomic_inc_16(&instance->fw_outstanding);

        /* Issue the command to the FW */
        WR_IB_QPORT((host_to_le32(cmd->frame_phys_addr) >> 3) |
            (cmd->frame_count - 1), instance);
}

static void
issue_cmd_ppc(struct megasas_cmd *cmd, struct megasas_instance *instance)
{
        atomic_inc_16(&instance->fw_outstanding);

        /* Issue the command to the FW */
        WR_IB_QPORT((host_to_le32(cmd->frame_phys_addr)) |
            (((cmd->frame_count - 1) << 1) | 1), instance);
}

/*
 * issue_cmd_in_sync_mode
 */
static int
issue_cmd_in_sync_mode_xscale(struct megasas_instance *instance,
    struct megasas_cmd *cmd)
{
        int             i;
        uint32_t        msecs = MFI_POLL_TIMEOUT_SECS * (10 * MILLISEC);

        cmd->cmd_status = ENODATA;

        WR_IB_QPORT((host_to_le32(cmd->frame_phys_addr) >> 3) |
            (cmd->frame_count - 1), instance);

        mutex_enter(&instance->int_cmd_mtx);

        for (i = 0; i < msecs && (cmd->cmd_status == ENODATA); i++) {
                cv_wait(&instance->int_cmd_cv, &instance->int_cmd_mtx);
        }

        mutex_exit(&instance->int_cmd_mtx);

        if (i < (msecs -1)) {
                return (0);
        } else {
                return (1);
        }
}

static int
issue_cmd_in_sync_mode_ppc(struct megasas_instance *instance,
    struct megasas_cmd *cmd)
{
        int             i;
        uint32_t        msecs = MFI_POLL_TIMEOUT_SECS * (10 * MILLISEC);

        con_log(CL_ANN1, (CE_NOTE, "issue_cmd_in_sync_mode_ppc: called\n"));

        cmd->cmd_status = ENODATA;

        WR_IB_QPORT((host_to_le32(cmd->frame_phys_addr)) |
            (((cmd->frame_count - 1) << 1) | 1), instance);

        mutex_enter(&instance->int_cmd_mtx);

        for (i = 0; i < msecs && (cmd->cmd_status == ENODATA); i++) {
                cv_wait(&instance->int_cmd_cv, &instance->int_cmd_mtx);
        }

        mutex_exit(&instance->int_cmd_mtx);

        con_log(CL_ANN1, (CE_NOTE, "issue_cmd_in_sync_mode_ppc: done\n"));

        if (i < (msecs -1)) {
                return (0);
        } else {
                return (1);
        }
}

/*
 * issue_cmd_in_poll_mode
 */
static int
issue_cmd_in_poll_mode_xscale(struct megasas_instance *instance,
    struct megasas_cmd *cmd)
{
        int             i;
        uint32_t        msecs = MFI_POLL_TIMEOUT_SECS * MILLISEC;
        struct megasas_header *frame_hdr;

        frame_hdr = (struct megasas_header *)cmd->frame;
        frame_hdr->cmd_status   = MFI_CMD_STATUS_POLL_MODE;
        frame_hdr->flags        |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;

        /* issue the frame using inbound queue port */
        WR_IB_QPORT((host_to_le32(cmd->frame_phys_addr) >> 3) |
            (cmd->frame_count - 1), instance);

        /* wait for cmd_status to change from 0xFF */
        for (i = 0; i < msecs && (frame_hdr->cmd_status ==
            MFI_CMD_STATUS_POLL_MODE); i++) {
                drv_usecwait(MILLISEC); /* wait for 1000 usecs */
        }

        if (frame_hdr->cmd_status == MFI_CMD_STATUS_POLL_MODE) {
                con_log(CL_ANN, (CE_NOTE, "issue_cmd_in_poll_mode: "
                    "cmd polling timed out"));
                return (DDI_FAILURE);
        }

        return (DDI_SUCCESS);
}

static int
issue_cmd_in_poll_mode_ppc(struct megasas_instance *instance,
    struct megasas_cmd *cmd)
{
        int             i;
        uint32_t        msecs = MFI_POLL_TIMEOUT_SECS * MILLISEC;
        struct megasas_header *frame_hdr;

        con_log(CL_ANN1, (CE_NOTE, "issue_cmd_in_poll_mode_ppc: called\n"));

        frame_hdr = (struct megasas_header *)cmd->frame;
        frame_hdr->cmd_status   = MFI_CMD_STATUS_POLL_MODE;
        frame_hdr->flags        |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;

        /* issue the frame using inbound queue port */
        WR_IB_QPORT((host_to_le32(cmd->frame_phys_addr)) |
            (((cmd->frame_count - 1) << 1) | 1), instance);

        /* wait for cmd_status to change from 0xFF */
        for (i = 0; i < msecs && (frame_hdr->cmd_status ==
            MFI_CMD_STATUS_POLL_MODE); i++) {
                drv_usecwait(MILLISEC); /* wait for 1000 usecs */
        }

        if (frame_hdr->cmd_status == MFI_CMD_STATUS_POLL_MODE) {
                con_log(CL_ANN, (CE_NOTE, "issue_cmd_in_poll_mode: "
                    "cmd polling timed out"));
                return (DDI_FAILURE);
        }

        return (DDI_SUCCESS);
}

static void
enable_intr_xscale(struct megasas_instance *instance)
{
        MFI_ENABLE_INTR(instance);
}

static void
enable_intr_ppc(struct megasas_instance *instance)
{
        uint32_t        mask;

        con_log(CL_ANN1, (CE_NOTE, "enable_intr_ppc: called\n"));

        /* WR_OB_DOORBELL_CLEAR(0xFFFFFFFF, instance); */
        WR_OB_DOORBELL_CLEAR(OB_DOORBELL_CLEAR_MASK, instance);

        /*
         * As 1078DE is same as 1078 chip, the interrupt mask
         * remains the same.
         */
        /* WR_OB_INTR_MASK(~0x80000000, instance); */
        WR_OB_INTR_MASK(~(MFI_REPLY_1078_MESSAGE_INTR), instance);

        /* dummy read to force PCI flush */
        mask = RD_OB_INTR_MASK(instance);

        con_log(CL_ANN1, (CE_NOTE, "enable_intr_ppc: "
            "outbound_intr_mask = 0x%x\n", mask));
}

static void
disable_intr_xscale(struct megasas_instance *instance)
{
        MFI_DISABLE_INTR(instance);
}

static void
disable_intr_ppc(struct megasas_instance *instance)
{
        con_log(CL_ANN1, (CE_NOTE, "disable_intr_ppc: called\n"));

        con_log(CL_ANN1, (CE_NOTE, "disable_intr_ppc: before : "
            "outbound_intr_mask = 0x%x\n", RD_OB_INTR_MASK(instance)));

        /* WR_OB_INTR_MASK(0xFFFFFFFF, instance); */
        WR_OB_INTR_MASK(OB_INTR_MASK, instance);

        con_log(CL_ANN1, (CE_NOTE, "disable_intr_ppc: after : "
            "outbound_intr_mask = 0x%x\n", RD_OB_INTR_MASK(instance)));

        /* dummy read to force PCI flush */
        (void) RD_OB_INTR_MASK(instance);
}

static int
intr_ack_xscale(struct megasas_instance *instance)
{
        uint32_t        status;

        /* check if it is our interrupt */
        status = RD_OB_INTR_STATUS(instance);

        if (!(status & MFI_OB_INTR_STATUS_MASK)) {
                return (DDI_INTR_UNCLAIMED);
        }

        /* clear the interrupt by writing back the same value */
        WR_OB_INTR_STATUS(status, instance);

        return (DDI_INTR_CLAIMED);
}

static int
intr_ack_ppc(struct megasas_instance *instance)
{
        uint32_t        status;

        con_log(CL_ANN1, (CE_NOTE, "intr_ack_ppc: called\n"));

        /* check if it is our interrupt */
        status = RD_OB_INTR_STATUS(instance);

        con_log(CL_ANN1, (CE_NOTE, "intr_ack_ppc: status = 0x%x\n", status));

        /*
         * As 1078DE is same as 1078 chip, the status field
         * remains the same.
         */
        if (!(status & MFI_REPLY_1078_MESSAGE_INTR)) {
                return (DDI_INTR_UNCLAIMED);
        }

        /* clear the interrupt by writing back the same value */
        WR_OB_DOORBELL_CLEAR(status, instance);

        /* dummy READ */
        status = RD_OB_INTR_STATUS(instance);

        con_log(CL_ANN1, (CE_NOTE, "intr_ack_ppc: interrupt cleared\n"));

        return (DDI_INTR_CLAIMED);
}

static int
megasas_common_check(struct megasas_instance *instance,
    struct  megasas_cmd *cmd)
{
        int ret = DDI_SUCCESS;

        if (megasas_check_dma_handle(cmd->frame_dma_obj.dma_handle) !=
            DDI_SUCCESS) {
                ddi_fm_service_impact(instance->dip, DDI_SERVICE_UNAFFECTED);
                if (cmd->pkt != NULL) {
                        cmd->pkt->pkt_reason = CMD_TRAN_ERR;
                        cmd->pkt->pkt_statistics = 0;
                }
                ret = DDI_FAILURE;
        }
        if (megasas_check_dma_handle(instance->mfi_internal_dma_obj.dma_handle)
            != DDI_SUCCESS) {
                ddi_fm_service_impact(instance->dip, DDI_SERVICE_UNAFFECTED);
                if (cmd->pkt != NULL) {
                        cmd->pkt->pkt_reason = CMD_TRAN_ERR;
                        cmd->pkt->pkt_statistics = 0;
                }
                ret = DDI_FAILURE;
        }
        if (megasas_check_dma_handle(instance->mfi_evt_detail_obj.dma_handle) !=
            DDI_SUCCESS) {
                ddi_fm_service_impact(instance->dip, DDI_SERVICE_UNAFFECTED);
                if (cmd->pkt != NULL) {
                        cmd->pkt->pkt_reason = CMD_TRAN_ERR;
                        cmd->pkt->pkt_statistics = 0;
                }
                ret = DDI_FAILURE;
        }
        if (megasas_check_acc_handle(instance->regmap_handle) != DDI_SUCCESS) {
                ddi_fm_service_impact(instance->dip, DDI_SERVICE_UNAFFECTED);
                ddi_fm_acc_err_clear(instance->regmap_handle, DDI_FME_VER0);
                if (cmd->pkt != NULL) {
                        cmd->pkt->pkt_reason = CMD_TRAN_ERR;
                        cmd->pkt->pkt_statistics = 0;
                }
                ret = DDI_FAILURE;
        }

        return (ret);
}

/*ARGSUSED*/
static int
megasas_fm_error_cb(dev_info_t *dip, ddi_fm_error_t *err, const void *impl_data)
{
        /*
         * as the driver can always deal with an error in any dma or
         * access handle, we can just return the fme_status value.
         */
        pci_ereport_post(dip, err, NULL);
        return (err->fme_status);
}

static void
megasas_fm_init(struct megasas_instance *instance)
{
        /* Need to change iblock to priority for new MSI intr */
        ddi_iblock_cookie_t fm_ibc;

        /* Only register with IO Fault Services if we have some capability */
        if (instance->fm_capabilities) {
                /* Adjust access and dma attributes for FMA */
                endian_attr.devacc_attr_access = DDI_FLAGERR_ACC;
                megasas_generic_dma_attr.dma_attr_flags = DDI_DMA_FLAGERR;

                /*
                 * Register capabilities with IO Fault Services.
                 * fm_capabilities will be updated to indicate
                 * capabilities actually supported (not requested.)
                 */

                ddi_fm_init(instance->dip, &instance->fm_capabilities, &fm_ibc);

                /*
                 * Initialize pci ereport capabilities if ereport
                 * capable (should always be.)
                 */

                if (DDI_FM_EREPORT_CAP(instance->fm_capabilities) ||
                    DDI_FM_ERRCB_CAP(instance->fm_capabilities)) {
                        pci_ereport_setup(instance->dip);
                }

                /*
                 * Register error callback if error callback capable.
                 */
                if (DDI_FM_ERRCB_CAP(instance->fm_capabilities)) {
                        ddi_fm_handler_register(instance->dip,
                            megasas_fm_error_cb, (void*) instance);
                }
        } else {
                endian_attr.devacc_attr_access = DDI_DEFAULT_ACC;
                megasas_generic_dma_attr.dma_attr_flags = 0;
        }
}

static void
megasas_fm_fini(struct megasas_instance *instance)
{
        /* Only unregister FMA capabilities if registered */
        if (instance->fm_capabilities) {
                /*
                 * Un-register error callback if error callback capable.
                 */
                if (DDI_FM_ERRCB_CAP(instance->fm_capabilities)) {
                        ddi_fm_handler_unregister(instance->dip);
                }

                /*
                 * Release any resources allocated by pci_ereport_setup()
                 */
                if (DDI_FM_EREPORT_CAP(instance->fm_capabilities) ||
                    DDI_FM_ERRCB_CAP(instance->fm_capabilities)) {
                        pci_ereport_teardown(instance->dip);
                }

                /* Unregister from IO Fault Services */
                ddi_fm_fini(instance->dip);

                /* Adjust access and dma attributes for FMA */
                endian_attr.devacc_attr_access = DDI_DEFAULT_ACC;
                megasas_generic_dma_attr.dma_attr_flags = 0;
        }
}

int
megasas_check_acc_handle(ddi_acc_handle_t handle)
{
        ddi_fm_error_t de;

        if (handle == NULL) {
                return (DDI_FAILURE);
        }

        ddi_fm_acc_err_get(handle, &de, DDI_FME_VERSION);

        return (de.fme_status);
}

int
megasas_check_dma_handle(ddi_dma_handle_t handle)
{
        ddi_fm_error_t de;

        if (handle == NULL) {
                return (DDI_FAILURE);
        }

        ddi_fm_dma_err_get(handle, &de, DDI_FME_VERSION);

        return (de.fme_status);
}

void
megasas_fm_ereport(struct megasas_instance *instance, char *detail)
{
        uint64_t ena;
        char buf[FM_MAX_CLASS];

        (void) snprintf(buf, FM_MAX_CLASS, "%s.%s", DDI_FM_DEVICE, detail);
        ena = fm_ena_generate(0, FM_ENA_FMT1);
        if (DDI_FM_EREPORT_CAP(instance->fm_capabilities)) {
                ddi_fm_ereport_post(instance->dip, buf, ena, DDI_NOSLEEP,
                    FM_VERSION, DATA_TYPE_UINT8, FM_EREPORT_VERSION, NULL);
        }
}