/*
 * Scsi Host Layer for MPT (Message Passing Technology) based controllers
 *
 * This code is based on drivers/scsi/mpt3sas/mpt3sas_scsih.c
 * Copyright (C) 2012-2014  LSI Corporation
 * Copyright (C) 2013-2014 Avago Technologies
 *  (mailto: MPT-FusionLinux.pdl@avagotech.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * NO WARRANTY
 * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
 * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
 * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
 * solely responsible for determining the appropriateness of using and
 * distributing the Program and assumes all risks associated with its
 * exercise of rights under this Agreement, including but not limited to
 * the risks and costs of program errors, damage to or loss of data,
 * programs or equipment, and unavailability or interruption of operations.

 * DISCLAIMER OF LIABILITY
 * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), 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 OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
 * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/blkdev.h>
#include <linux/sched.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/raid_class.h>
#include <linux/blk-mq-pci.h>
#include <asm/unaligned.h>

#include "mpt3sas_base.h"

#define RAID_CHANNEL 1

#define PCIE_CHANNEL 2

/* forward proto's */
static void _scsih_expander_node_remove(struct MPT3SAS_ADAPTER *ioc,
	struct _sas_node *sas_expander);
static void _firmware_event_work(struct work_struct *work);

static void _scsih_remove_device(struct MPT3SAS_ADAPTER *ioc,
	struct _sas_device *sas_device);
static int _scsih_add_device(struct MPT3SAS_ADAPTER *ioc, u16 handle,
	u8 retry_count, u8 is_pd);
static int _scsih_pcie_add_device(struct MPT3SAS_ADAPTER *ioc, u16 handle);
static void _scsih_pcie_device_remove_from_sml(struct MPT3SAS_ADAPTER *ioc,
	struct _pcie_device *pcie_device);
static void
_scsih_pcie_check_device(struct MPT3SAS_ADAPTER *ioc, u16 handle);
static u8 _scsih_check_for_pending_tm(struct MPT3SAS_ADAPTER *ioc, u16 smid);
static void _scsih_complete_devices_scanning(struct MPT3SAS_ADAPTER *ioc);

/* global parameters */
LIST_HEAD(mpt3sas_ioc_list);
/* global ioc lock for list operations */
DEFINE_SPINLOCK(gioc_lock);

MODULE_AUTHOR(MPT3SAS_AUTHOR);
MODULE_DESCRIPTION(MPT3SAS_DESCRIPTION);
MODULE_LICENSE("GPL");
MODULE_VERSION(MPT3SAS_DRIVER_VERSION);
MODULE_ALIAS("mpt2sas");

/* local parameters */
static u8 scsi_io_cb_idx = -1;
static u8 tm_cb_idx = -1;
static u8 ctl_cb_idx = -1;
static u8 base_cb_idx = -1;
static u8 port_enable_cb_idx = -1;
static u8 transport_cb_idx = -1;
static u8 scsih_cb_idx = -1;
static u8 config_cb_idx = -1;
static int mpt2_ids;
static int mpt3_ids;

static u8 tm_tr_cb_idx = -1 ;
static u8 tm_tr_volume_cb_idx = -1 ;
static u8 tm_sas_control_cb_idx = -1;

/* command line options */
static u32 logging_level;
MODULE_PARM_DESC(logging_level,
	" bits for enabling additional logging info (default=0)");


static ushort max_sectors = 0xFFFF;
module_param(max_sectors, ushort, 0444);
MODULE_PARM_DESC(max_sectors, "max sectors, range 64 to 32767  default=32767");


static int missing_delay[2] = {-1, -1};
module_param_array(missing_delay, int, NULL, 0444);
MODULE_PARM_DESC(missing_delay, " device missing delay , io missing delay");

/* scsi-mid layer global parmeter is max_report_luns, which is 511 */
#define MPT3SAS_MAX_LUN (16895)
static u64 max_lun = MPT3SAS_MAX_LUN;
module_param(max_lun, ullong, 0444);
MODULE_PARM_DESC(max_lun, " max lun, default=16895 ");

static ushort hbas_to_enumerate;
module_param(hbas_to_enumerate, ushort, 0444);
MODULE_PARM_DESC(hbas_to_enumerate,
		" 0 - enumerates both SAS 2.0 & SAS 3.0 generation HBAs\n \
		  1 - enumerates only SAS 2.0 generation HBAs\n \
		  2 - enumerates only SAS 3.0 generation HBAs (default=0)");

/* diag_buffer_enable is bitwise
 * bit 0 set = TRACE
 * bit 1 set = SNAPSHOT
 * bit 2 set = EXTENDED
 *
 * Either bit can be set, or both
 */
static int diag_buffer_enable = -1;
module_param(diag_buffer_enable, int, 0444);
MODULE_PARM_DESC(diag_buffer_enable,
	" post diag buffers (TRACE=1/SNAPSHOT=2/EXTENDED=4/default=0)");
static int disable_discovery = -1;
module_param(disable_discovery, int, 0444);
MODULE_PARM_DESC(disable_discovery, " disable discovery ");


/* permit overriding the host protection capabilities mask (EEDP/T10 PI) */
static int prot_mask = -1;
module_param(prot_mask, int, 0444);
MODULE_PARM_DESC(prot_mask, " host protection capabilities mask, def=7 ");

static bool enable_sdev_max_qd;
module_param(enable_sdev_max_qd, bool, 0444);
MODULE_PARM_DESC(enable_sdev_max_qd,
	"Enable sdev max qd as can_queue, def=disabled(0)");

static int multipath_on_hba = -1;
module_param(multipath_on_hba, int, 0);
MODULE_PARM_DESC(multipath_on_hba,
	"Multipath support to add same target device\n\t\t"
	"as many times as it is visible to HBA from various paths\n\t\t"
	"(by default:\n\t\t"
	"\t SAS 2.0 & SAS 3.0 HBA - This will be disabled,\n\t\t"
	"\t SAS 3.5 HBA - This will be enabled)");

static int host_tagset_enable = 1;
module_param(host_tagset_enable, int, 0444);
MODULE_PARM_DESC(host_tagset_enable,
	"Shared host tagset enable/disable Default: enable(1)");

/* raid transport support */
static struct raid_template *mpt3sas_raid_template;
static struct raid_template *mpt2sas_raid_template;


/**
 * struct sense_info - common structure for obtaining sense keys
 * @skey: sense key
 * @asc: additional sense code
 * @ascq: additional sense code qualifier
 */
struct sense_info {
	u8 skey;
	u8 asc;
	u8 ascq;
};

#define MPT3SAS_PROCESS_TRIGGER_DIAG (0xFFFB)
#define MPT3SAS_TURN_ON_PFA_LED (0xFFFC)
#define MPT3SAS_PORT_ENABLE_COMPLETE (0xFFFD)
#define MPT3SAS_ABRT_TASK_SET (0xFFFE)
#define MPT3SAS_REMOVE_UNRESPONDING_DEVICES (0xFFFF)
/**
 * struct fw_event_work - firmware event struct
 * @list: link list framework
 * @work: work object (ioc->fault_reset_work_q)
 * @ioc: per adapter object
 * @device_handle: device handle
 * @VF_ID: virtual function id
 * @VP_ID: virtual port id
 * @ignore: flag meaning this event has been marked to ignore
 * @event: firmware event MPI2_EVENT_XXX defined in mpi2_ioc.h
 * @refcount: kref for this event
 * @event_data: reply event data payload follows
 *
 * This object stored on ioc->fw_event_list.
 */
struct fw_event_work {
	struct list_head	list;
	struct work_struct	work;

	struct MPT3SAS_ADAPTER *ioc;
	u16			device_handle;
	u8			VF_ID;
	u8			VP_ID;
	u8			ignore;
	u16			event;
	struct kref		refcount;
	char			event_data[] __aligned(4);
};

static void fw_event_work_free(struct kref *r)
{
	kfree(container_of(r, struct fw_event_work, refcount));
}

static void fw_event_work_get(struct fw_event_work *fw_work)
{
	kref_get(&fw_work->refcount);
}

static void fw_event_work_put(struct fw_event_work *fw_work)
{
	kref_put(&fw_work->refcount, fw_event_work_free);
}

static struct fw_event_work *alloc_fw_event_work(int len)
{
	struct fw_event_work *fw_event;

	fw_event = kzalloc(sizeof(*fw_event) + len, GFP_ATOMIC);
	if (!fw_event)
		return NULL;

	kref_init(&fw_event->refcount);
	return fw_event;
}

/**
 * struct _scsi_io_transfer - scsi io transfer
 * @handle: sas device handle (assigned by firmware)
 * @is_raid: flag set for hidden raid components
 * @dir: DMA_TO_DEVICE, DMA_FROM_DEVICE,
 * @data_length: data transfer length
 * @data_dma: dma pointer to data
 * @sense: sense data
 * @lun: lun number
 * @cdb_length: cdb length
 * @cdb: cdb contents
 * @timeout: timeout for this command
 * @VF_ID: virtual function id
 * @VP_ID: virtual port id
 * @valid_reply: flag set for reply message
 * @sense_length: sense length
 * @ioc_status: ioc status
 * @scsi_state: scsi state
 * @scsi_status: scsi staus
 * @log_info: log information
 * @transfer_length: data length transfer when there is a reply message
 *
 * Used for sending internal scsi commands to devices within this module.
 * Refer to _scsi_send_scsi_io().
 */
struct _scsi_io_transfer {
	u16	handle;
	u8	is_raid;
	enum dma_data_direction dir;
	u32	data_length;
	dma_addr_t data_dma;
	u8	sense[SCSI_SENSE_BUFFERSIZE];
	u32	lun;
	u8	cdb_length;
	u8	cdb[32];
	u8	timeout;
	u8	VF_ID;
	u8	VP_ID;
	u8	valid_reply;
  /* the following bits are only valid when 'valid_reply = 1' */
	u32	sense_length;
	u16	ioc_status;
	u8	scsi_state;
	u8	scsi_status;
	u32	log_info;
	u32	transfer_length;
};

/**
 * _scsih_set_debug_level - global setting of ioc->logging_level.
 * @val: ?
 * @kp: ?
 *
 * Note: The logging levels are defined in mpt3sas_debug.h.
 */
static int
_scsih_set_debug_level(const char *val, const struct kernel_param *kp)
{
	int ret = param_set_int(val, kp);
	struct MPT3SAS_ADAPTER *ioc;

	if (ret)
		return ret;

	pr_info("setting logging_level(0x%08x)\n", logging_level);
	spin_lock(&gioc_lock);
	list_for_each_entry(ioc, &mpt3sas_ioc_list, list)
		ioc->logging_level = logging_level;
	spin_unlock(&gioc_lock);
	return 0;
}
module_param_call(logging_level, _scsih_set_debug_level, param_get_int,
	&logging_level, 0644);

/**
 * _scsih_srch_boot_sas_address - search based on sas_address
 * @sas_address: sas address
 * @boot_device: boot device object from bios page 2
 *
 * Return: 1 when there's a match, 0 means no match.
 */
static inline int
_scsih_srch_boot_sas_address(u64 sas_address,
	Mpi2BootDeviceSasWwid_t *boot_device)
{
	return (sas_address == le64_to_cpu(boot_device->SASAddress)) ?  1 : 0;
}

/**
 * _scsih_srch_boot_device_name - search based on device name
 * @device_name: device name specified in INDENTIFY fram
 * @boot_device: boot device object from bios page 2
 *
 * Return: 1 when there's a match, 0 means no match.
 */
static inline int
_scsih_srch_boot_device_name(u64 device_name,
	Mpi2BootDeviceDeviceName_t *boot_device)
{
	return (device_name == le64_to_cpu(boot_device->DeviceName)) ? 1 : 0;
}

/**
 * _scsih_srch_boot_encl_slot - search based on enclosure_logical_id/slot
 * @enclosure_logical_id: enclosure logical id
 * @slot_number: slot number
 * @boot_device: boot device object from bios page 2
 *
 * Return: 1 when there's a match, 0 means no match.
 */
static inline int
_scsih_srch_boot_encl_slot(u64 enclosure_logical_id, u16 slot_number,
	Mpi2BootDeviceEnclosureSlot_t *boot_device)
{
	return (enclosure_logical_id == le64_to_cpu(boot_device->
	    EnclosureLogicalID) && slot_number == le16_to_cpu(boot_device->
	    SlotNumber)) ? 1 : 0;
}

/**
 * mpt3sas_get_port_by_id - get hba port entry corresponding to provided
 *			  port number from port list
 * @ioc: per adapter object
 * @port_id: port number
 * @bypass_dirty_port_flag: when set look the matching hba port entry even
 *			if hba port entry is marked as dirty.
 *
 * Search for hba port entry corresponding to provided port number,
 * if available return port object otherwise return NULL.
 */
struct hba_port *
mpt3sas_get_port_by_id(struct MPT3SAS_ADAPTER *ioc,
	u8 port_id, u8 bypass_dirty_port_flag)
{
	struct hba_port *port, *port_next;

	/*
	 * When multipath_on_hba is disabled then
	 * search the hba_port entry using default
	 * port id i.e. 255
	 */
	if (!ioc->multipath_on_hba)
		port_id = MULTIPATH_DISABLED_PORT_ID;

	list_for_each_entry_safe(port, port_next,
	    &ioc->port_table_list, list) {
		if (port->port_id != port_id)
			continue;
		if (bypass_dirty_port_flag)
			return port;
		if (port->flags & HBA_PORT_FLAG_DIRTY_PORT)
			continue;
		return port;
	}

	/*
	 * Allocate hba_port object for default port id (i.e. 255)
	 * when multipath_on_hba is disabled for the HBA.
	 * And add this object to port_table_list.
	 */
	if (!ioc->multipath_on_hba) {
		port = kzalloc(sizeof(struct hba_port), GFP_ATOMIC);
		if (!port)
			return NULL;

		port->port_id = port_id;
		ioc_info(ioc,
		   "hba_port entry: %p, port: %d is added to hba_port list\n",
		   port, port->port_id);
		list_add_tail(&port->list,
		    &ioc->port_table_list);
		return port;
	}
	return NULL;
}

/**
 * mpt3sas_get_vphy_by_phy - get virtual_phy object corresponding to phy number
 * @ioc: per adapter object
 * @port: hba_port object
 * @phy: phy number
 *
 * Return virtual_phy object corresponding to phy number.
 */
struct virtual_phy *
mpt3sas_get_vphy_by_phy(struct MPT3SAS_ADAPTER *ioc,
	struct hba_port *port, u32 phy)
{
	struct virtual_phy *vphy, *vphy_next;

	if (!port->vphys_mask)
		return NULL;

	list_for_each_entry_safe(vphy, vphy_next, &port->vphys_list, list) {
		if (vphy->phy_mask & (1 << phy))
			return vphy;
	}
	return NULL;
}

/**
 * _scsih_is_boot_device - search for matching boot device.
 * @sas_address: sas address
 * @device_name: device name specified in INDENTIFY fram
 * @enclosure_logical_id: enclosure logical id
 * @slot: slot number
 * @form: specifies boot device form
 * @boot_device: boot device object from bios page 2
 *
 * Return: 1 when there's a match, 0 means no match.
 */
static int
_scsih_is_boot_device(u64 sas_address, u64 device_name,
	u64 enclosure_logical_id, u16 slot, u8 form,
	Mpi2BiosPage2BootDevice_t *boot_device)
{
	int rc = 0;

	switch (form) {
	case MPI2_BIOSPAGE2_FORM_SAS_WWID:
		if (!sas_address)
			break;
		rc = _scsih_srch_boot_sas_address(
		    sas_address, &boot_device->SasWwid);
		break;
	case MPI2_BIOSPAGE2_FORM_ENCLOSURE_SLOT:
		if (!enclosure_logical_id)
			break;
		rc = _scsih_srch_boot_encl_slot(
		    enclosure_logical_id,
		    slot, &boot_device->EnclosureSlot);
		break;
	case MPI2_BIOSPAGE2_FORM_DEVICE_NAME:
		if (!device_name)
			break;
		rc = _scsih_srch_boot_device_name(
		    device_name, &boot_device->DeviceName);
		break;
	case MPI2_BIOSPAGE2_FORM_NO_DEVICE_SPECIFIED:
		break;
	}

	return rc;
}

/**
 * _scsih_get_sas_address - set the sas_address for given device handle
 * @ioc: ?
 * @handle: device handle
 * @sas_address: sas address
 *
 * Return: 0 success, non-zero when failure
 */
static int
_scsih_get_sas_address(struct MPT3SAS_ADAPTER *ioc, u16 handle,
	u64 *sas_address)
{
	Mpi2SasDevicePage0_t sas_device_pg0;
	Mpi2ConfigReply_t mpi_reply;
	u32 ioc_status;

	*sas_address = 0;

	if ((mpt3sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
	    MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, handle))) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return -ENXIO;
	}

	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
	if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
		/* For HBA, vSES doesn't return HBA SAS address. Instead return
		 * vSES's sas address.
		 */
		if ((handle <= ioc->sas_hba.num_phys) &&
		   (!(le32_to_cpu(sas_device_pg0.DeviceInfo) &
		   MPI2_SAS_DEVICE_INFO_SEP)))
			*sas_address = ioc->sas_hba.sas_address;
		else
			*sas_address = le64_to_cpu(sas_device_pg0.SASAddress);
		return 0;
	}

	/* we hit this because the given parent handle doesn't exist */
	if (ioc_status == MPI2_IOCSTATUS_CONFIG_INVALID_PAGE)
		return -ENXIO;

	/* else error case */
	ioc_err(ioc, "handle(0x%04x), ioc_status(0x%04x), failure at %s:%d/%s()!\n",
		handle, ioc_status, __FILE__, __LINE__, __func__);
	return -EIO;
}

/**
 * _scsih_determine_boot_device - determine boot device.
 * @ioc: per adapter object
 * @device: sas_device or pcie_device object
 * @channel: SAS or PCIe channel
 *
 * Determines whether this device should be first reported device to
 * to scsi-ml or sas transport, this purpose is for persistent boot device.
 * There are primary, alternate, and current entries in bios page 2. The order
 * priority is primary, alternate, then current.  This routine saves
 * the corresponding device object.
 * The saved data to be used later in _scsih_probe_boot_devices().
 */
static void
_scsih_determine_boot_device(struct MPT3SAS_ADAPTER *ioc, void *device,
	u32 channel)
{
	struct _sas_device *sas_device;
	struct _pcie_device *pcie_device;
	struct _raid_device *raid_device;
	u64 sas_address;
	u64 device_name;
	u64 enclosure_logical_id;
	u16 slot;

	 /* only process this function when driver loads */
	if (!ioc->is_driver_loading)
		return;

	 /* no Bios, return immediately */
	if (!ioc->bios_pg3.BiosVersion)
		return;

	if (channel == RAID_CHANNEL) {
		raid_device = device;
		sas_address = raid_device->wwid;
		device_name = 0;
		enclosure_logical_id = 0;
		slot = 0;
	} else if (channel == PCIE_CHANNEL) {
		pcie_device = device;
		sas_address = pcie_device->wwid;
		device_name = 0;
		enclosure_logical_id = 0;
		slot = 0;
	} else {
		sas_device = device;
		sas_address = sas_device->sas_address;
		device_name = sas_device->device_name;
		enclosure_logical_id = sas_device->enclosure_logical_id;
		slot = sas_device->slot;
	}

	if (!ioc->req_boot_device.device) {
		if (_scsih_is_boot_device(sas_address, device_name,
		    enclosure_logical_id, slot,
		    (ioc->bios_pg2.ReqBootDeviceForm &
		    MPI2_BIOSPAGE2_FORM_MASK),
		    &ioc->bios_pg2.RequestedBootDevice)) {
			dinitprintk(ioc,
				    ioc_info(ioc, "%s: req_boot_device(0x%016llx)\n",
					     __func__, (u64)sas_address));
			ioc->req_boot_device.device = device;
			ioc->req_boot_device.channel = channel;
		}
	}

	if (!ioc->req_alt_boot_device.device) {
		if (_scsih_is_boot_device(sas_address, device_name,
		    enclosure_logical_id, slot,
		    (ioc->bios_pg2.ReqAltBootDeviceForm &
		    MPI2_BIOSPAGE2_FORM_MASK),
		    &ioc->bios_pg2.RequestedAltBootDevice)) {
			dinitprintk(ioc,
				    ioc_info(ioc, "%s: req_alt_boot_device(0x%016llx)\n",
					     __func__, (u64)sas_address));
			ioc->req_alt_boot_device.device = device;
			ioc->req_alt_boot_device.channel = channel;
		}
	}

	if (!ioc->current_boot_device.device) {
		if (_scsih_is_boot_device(sas_address, device_name,
		    enclosure_logical_id, slot,
		    (ioc->bios_pg2.CurrentBootDeviceForm &
		    MPI2_BIOSPAGE2_FORM_MASK),
		    &ioc->bios_pg2.CurrentBootDevice)) {
			dinitprintk(ioc,
				    ioc_info(ioc, "%s: current_boot_device(0x%016llx)\n",
					     __func__, (u64)sas_address));
			ioc->current_boot_device.device = device;
			ioc->current_boot_device.channel = channel;
		}
	}
}

static struct _sas_device *
__mpt3sas_get_sdev_from_target(struct MPT3SAS_ADAPTER *ioc,
		struct MPT3SAS_TARGET *tgt_priv)
{
	struct _sas_device *ret;

	assert_spin_locked(&ioc->sas_device_lock);

	ret = tgt_priv->sas_dev;
	if (ret)
		sas_device_get(ret);

	return ret;
}

static struct _sas_device *
mpt3sas_get_sdev_from_target(struct MPT3SAS_ADAPTER *ioc,
		struct MPT3SAS_TARGET *tgt_priv)
{
	struct _sas_device *ret;
	unsigned long flags;

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	ret = __mpt3sas_get_sdev_from_target(ioc, tgt_priv);
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);

	return ret;
}

static struct _pcie_device *
__mpt3sas_get_pdev_from_target(struct MPT3SAS_ADAPTER *ioc,
	struct MPT3SAS_TARGET *tgt_priv)
{
	struct _pcie_device *ret;

	assert_spin_locked(&ioc->pcie_device_lock);

	ret = tgt_priv->pcie_dev;
	if (ret)
		pcie_device_get(ret);

	return ret;
}

/**
 * mpt3sas_get_pdev_from_target - pcie device search
 * @ioc: per adapter object
 * @tgt_priv: starget private object
 *
 * Context: This function will acquire ioc->pcie_device_lock and will release
 * before returning the pcie_device object.
 *
 * This searches for pcie_device from target, then return pcie_device object.
 */
static struct _pcie_device *
mpt3sas_get_pdev_from_target(struct MPT3SAS_ADAPTER *ioc,
	struct MPT3SAS_TARGET *tgt_priv)
{
	struct _pcie_device *ret;
	unsigned long flags;

	spin_lock_irqsave(&ioc->pcie_device_lock, flags);
	ret = __mpt3sas_get_pdev_from_target(ioc, tgt_priv);
	spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);

	return ret;
}


/**
 * __mpt3sas_get_sdev_by_rphy - sas device search
 * @ioc: per adapter object
 * @rphy: sas_rphy pointer
 *
 * Context: This function will acquire ioc->sas_device_lock and will release
 * before returning the sas_device object.
 *
 * This searches for sas_device from rphy object
 * then return sas_device object.
 */
struct _sas_device *
__mpt3sas_get_sdev_by_rphy(struct MPT3SAS_ADAPTER *ioc,
	struct sas_rphy *rphy)
{
	struct _sas_device *sas_device;

	assert_spin_locked(&ioc->sas_device_lock);

	list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
		if (sas_device->rphy != rphy)
			continue;
		sas_device_get(sas_device);
		return sas_device;
	}

	sas_device = NULL;
	list_for_each_entry(sas_device, &ioc->sas_device_init_list, list) {
		if (sas_device->rphy != rphy)
			continue;
		sas_device_get(sas_device);
		return sas_device;
	}

	return NULL;
}

/**
 * __mpt3sas_get_sdev_by_addr - get _sas_device object corresponding to provided
 *				sas address from sas_device_list list
 * @ioc: per adapter object
 * @sas_address: device sas address
 * @port: port number
 *
 * Search for _sas_device object corresponding to provided sas address,
 * if available return _sas_device object address otherwise return NULL.
 */
struct _sas_device *
__mpt3sas_get_sdev_by_addr(struct MPT3SAS_ADAPTER *ioc,
	u64 sas_address, struct hba_port *port)
{
	struct _sas_device *sas_device;

	if (!port)
		return NULL;

	assert_spin_locked(&ioc->sas_device_lock);

	list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
		if (sas_device->sas_address != sas_address)
			continue;
		if (sas_device->port != port)
			continue;
		sas_device_get(sas_device);
		return sas_device;
	}

	list_for_each_entry(sas_device, &ioc->sas_device_init_list, list) {
		if (sas_device->sas_address != sas_address)
			continue;
		if (sas_device->port != port)
			continue;
		sas_device_get(sas_device);
		return sas_device;
	}

	return NULL;
}

/**
 * mpt3sas_get_sdev_by_addr - sas device search
 * @ioc: per adapter object
 * @sas_address: sas address
 * @port: hba port entry
 * Context: Calling function should acquire ioc->sas_device_lock
 *
 * This searches for sas_device based on sas_address & port number,
 * then return sas_device object.
 */
struct _sas_device *
mpt3sas_get_sdev_by_addr(struct MPT3SAS_ADAPTER *ioc,
	u64 sas_address, struct hba_port *port)
{
	struct _sas_device *sas_device;
	unsigned long flags;

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device = __mpt3sas_get_sdev_by_addr(ioc,
	    sas_address, port);
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);

	return sas_device;
}

static struct _sas_device *
__mpt3sas_get_sdev_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _sas_device *sas_device;

	assert_spin_locked(&ioc->sas_device_lock);

	list_for_each_entry(sas_device, &ioc->sas_device_list, list)
		if (sas_device->handle == handle)
			goto found_device;

	list_for_each_entry(sas_device, &ioc->sas_device_init_list, list)
		if (sas_device->handle == handle)
			goto found_device;

	return NULL;

found_device:
	sas_device_get(sas_device);
	return sas_device;
}

/**
 * mpt3sas_get_sdev_by_handle - sas device search
 * @ioc: per adapter object
 * @handle: sas device handle (assigned by firmware)
 * Context: Calling function should acquire ioc->sas_device_lock
 *
 * This searches for sas_device based on sas_address, then return sas_device
 * object.
 */
struct _sas_device *
mpt3sas_get_sdev_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _sas_device *sas_device;
	unsigned long flags;

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device = __mpt3sas_get_sdev_by_handle(ioc, handle);
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);

	return sas_device;
}

/**
 * _scsih_display_enclosure_chassis_info - display device location info
 * @ioc: per adapter object
 * @sas_device: per sas device object
 * @sdev: scsi device struct
 * @starget: scsi target struct
 */
static void
_scsih_display_enclosure_chassis_info(struct MPT3SAS_ADAPTER *ioc,
	struct _sas_device *sas_device, struct scsi_device *sdev,
	struct scsi_target *starget)
{
	if (sdev) {
		if (sas_device->enclosure_handle != 0)
			sdev_printk(KERN_INFO, sdev,
			    "enclosure logical id (0x%016llx), slot(%d) \n",
			    (unsigned long long)
			    sas_device->enclosure_logical_id,
			    sas_device->slot);
		if (sas_device->connector_name[0] != '\0')
			sdev_printk(KERN_INFO, sdev,
			    "enclosure level(0x%04x), connector name( %s)\n",
			    sas_device->enclosure_level,
			    sas_device->connector_name);
		if (sas_device->is_chassis_slot_valid)
			sdev_printk(KERN_INFO, sdev, "chassis slot(0x%04x)\n",
			    sas_device->chassis_slot);
	} else if (starget) {
		if (sas_device->enclosure_handle != 0)
			starget_printk(KERN_INFO, starget,
			    "enclosure logical id(0x%016llx), slot(%d) \n",
			    (unsigned long long)
			    sas_device->enclosure_logical_id,
			    sas_device->slot);
		if (sas_device->connector_name[0] != '\0')
			starget_printk(KERN_INFO, starget,
			    "enclosure level(0x%04x), connector name( %s)\n",
			    sas_device->enclosure_level,
			    sas_device->connector_name);
		if (sas_device->is_chassis_slot_valid)
			starget_printk(KERN_INFO, starget,
			    "chassis slot(0x%04x)\n",
			    sas_device->chassis_slot);
	} else {
		if (sas_device->enclosure_handle != 0)
			ioc_info(ioc, "enclosure logical id(0x%016llx), slot(%d)\n",
				 (u64)sas_device->enclosure_logical_id,
				 sas_device->slot);
		if (sas_device->connector_name[0] != '\0')
			ioc_info(ioc, "enclosure level(0x%04x), connector name( %s)\n",
				 sas_device->enclosure_level,
				 sas_device->connector_name);
		if (sas_device->is_chassis_slot_valid)
			ioc_info(ioc, "chassis slot(0x%04x)\n",
				 sas_device->chassis_slot);
	}
}

/**
 * _scsih_sas_device_remove - remove sas_device from list.
 * @ioc: per adapter object
 * @sas_device: the sas_device object
 * Context: This function will acquire ioc->sas_device_lock.
 *
 * If sas_device is on the list, remove it and decrement its reference count.
 */
static void
_scsih_sas_device_remove(struct MPT3SAS_ADAPTER *ioc,
	struct _sas_device *sas_device)
{
	unsigned long flags;

	if (!sas_device)
		return;
	ioc_info(ioc, "removing handle(0x%04x), sas_addr(0x%016llx)\n",
		 sas_device->handle, (u64)sas_device->sas_address);

	_scsih_display_enclosure_chassis_info(ioc, sas_device, NULL, NULL);

	/*
	 * The lock serializes access to the list, but we still need to verify
	 * that nobody removed the entry while we were waiting on the lock.
	 */
	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	if (!list_empty(&sas_device->list)) {
		list_del_init(&sas_device->list);
		sas_device_put(sas_device);
	}
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
}

/**
 * _scsih_device_remove_by_handle - removing device object by handle
 * @ioc: per adapter object
 * @handle: device handle
 */
static void
_scsih_device_remove_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _sas_device *sas_device;
	unsigned long flags;

	if (ioc->shost_recovery)
		return;

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device = __mpt3sas_get_sdev_by_handle(ioc, handle);
	if (sas_device) {
		list_del_init(&sas_device->list);
		sas_device_put(sas_device);
	}
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
	if (sas_device) {
		_scsih_remove_device(ioc, sas_device);
		sas_device_put(sas_device);
	}
}

/**
 * mpt3sas_device_remove_by_sas_address - removing device object by
 *					sas address & port number
 * @ioc: per adapter object
 * @sas_address: device sas_address
 * @port: hba port entry
 *
 * Return nothing.
 */
void
mpt3sas_device_remove_by_sas_address(struct MPT3SAS_ADAPTER *ioc,
	u64 sas_address, struct hba_port *port)
{
	struct _sas_device *sas_device;
	unsigned long flags;

	if (ioc->shost_recovery)
		return;

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device = __mpt3sas_get_sdev_by_addr(ioc, sas_address, port);
	if (sas_device) {
		list_del_init(&sas_device->list);
		sas_device_put(sas_device);
	}
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
	if (sas_device) {
		_scsih_remove_device(ioc, sas_device);
		sas_device_put(sas_device);
	}
}

/**
 * _scsih_sas_device_add - insert sas_device to the list.
 * @ioc: per adapter object
 * @sas_device: the sas_device object
 * Context: This function will acquire ioc->sas_device_lock.
 *
 * Adding new object to the ioc->sas_device_list.
 */
static void
_scsih_sas_device_add(struct MPT3SAS_ADAPTER *ioc,
	struct _sas_device *sas_device)
{
	unsigned long flags;

	dewtprintk(ioc,
		   ioc_info(ioc, "%s: handle(0x%04x), sas_addr(0x%016llx)\n",
			    __func__, sas_device->handle,
			    (u64)sas_device->sas_address));

	dewtprintk(ioc, _scsih_display_enclosure_chassis_info(ioc, sas_device,
	    NULL, NULL));

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device_get(sas_device);
	list_add_tail(&sas_device->list, &ioc->sas_device_list);
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);

	if (ioc->hide_drives) {
		clear_bit(sas_device->handle, ioc->pend_os_device_add);
		return;
	}

	if (!mpt3sas_transport_port_add(ioc, sas_device->handle,
	     sas_device->sas_address_parent, sas_device->port)) {
		_scsih_sas_device_remove(ioc, sas_device);
	} else if (!sas_device->starget) {
		/*
		 * When asyn scanning is enabled, its not possible to remove
		 * devices while scanning is turned on due to an oops in
		 * scsi_sysfs_add_sdev()->add_device()->sysfs_addrm_start()
		 */
		if (!ioc->is_driver_loading) {
			mpt3sas_transport_port_remove(ioc,
			    sas_device->sas_address,
			    sas_device->sas_address_parent,
			    sas_device->port);
			_scsih_sas_device_remove(ioc, sas_device);
		}
	} else
		clear_bit(sas_device->handle, ioc->pend_os_device_add);
}

/**
 * _scsih_sas_device_init_add - insert sas_device to the list.
 * @ioc: per adapter object
 * @sas_device: the sas_device object
 * Context: This function will acquire ioc->sas_device_lock.
 *
 * Adding new object at driver load time to the ioc->sas_device_init_list.
 */
static void
_scsih_sas_device_init_add(struct MPT3SAS_ADAPTER *ioc,
	struct _sas_device *sas_device)
{
	unsigned long flags;

	dewtprintk(ioc,
		   ioc_info(ioc, "%s: handle(0x%04x), sas_addr(0x%016llx)\n",
			    __func__, sas_device->handle,
			    (u64)sas_device->sas_address));

	dewtprintk(ioc, _scsih_display_enclosure_chassis_info(ioc, sas_device,
	    NULL, NULL));

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device_get(sas_device);
	list_add_tail(&sas_device->list, &ioc->sas_device_init_list);
	_scsih_determine_boot_device(ioc, sas_device, 0);
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
}


static struct _pcie_device *
__mpt3sas_get_pdev_by_wwid(struct MPT3SAS_ADAPTER *ioc, u64 wwid)
{
	struct _pcie_device *pcie_device;

	assert_spin_locked(&ioc->pcie_device_lock);

	list_for_each_entry(pcie_device, &ioc->pcie_device_list, list)
		if (pcie_device->wwid == wwid)
			goto found_device;

	list_for_each_entry(pcie_device, &ioc->pcie_device_init_list, list)
		if (pcie_device->wwid == wwid)
			goto found_device;

	return NULL;

found_device:
	pcie_device_get(pcie_device);
	return pcie_device;
}


/**
 * mpt3sas_get_pdev_by_wwid - pcie device search
 * @ioc: per adapter object
 * @wwid: wwid
 *
 * Context: This function will acquire ioc->pcie_device_lock and will release
 * before returning the pcie_device object.
 *
 * This searches for pcie_device based on wwid, then return pcie_device object.
 */
static struct _pcie_device *
mpt3sas_get_pdev_by_wwid(struct MPT3SAS_ADAPTER *ioc, u64 wwid)
{
	struct _pcie_device *pcie_device;
	unsigned long flags;

	spin_lock_irqsave(&ioc->pcie_device_lock, flags);
	pcie_device = __mpt3sas_get_pdev_by_wwid(ioc, wwid);
	spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);

	return pcie_device;
}


static struct _pcie_device *
__mpt3sas_get_pdev_by_idchannel(struct MPT3SAS_ADAPTER *ioc, int id,
	int channel)
{
	struct _pcie_device *pcie_device;

	assert_spin_locked(&ioc->pcie_device_lock);

	list_for_each_entry(pcie_device, &ioc->pcie_device_list, list)
		if (pcie_device->id == id && pcie_device->channel == channel)
			goto found_device;

	list_for_each_entry(pcie_device, &ioc->pcie_device_init_list, list)
		if (pcie_device->id == id && pcie_device->channel == channel)
			goto found_device;

	return NULL;

found_device:
	pcie_device_get(pcie_device);
	return pcie_device;
}

static struct _pcie_device *
__mpt3sas_get_pdev_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _pcie_device *pcie_device;

	assert_spin_locked(&ioc->pcie_device_lock);

	list_for_each_entry(pcie_device, &ioc->pcie_device_list, list)
		if (pcie_device->handle == handle)
			goto found_device;

	list_for_each_entry(pcie_device, &ioc->pcie_device_init_list, list)
		if (pcie_device->handle == handle)
			goto found_device;

	return NULL;

found_device:
	pcie_device_get(pcie_device);
	return pcie_device;
}


/**
 * mpt3sas_get_pdev_by_handle - pcie device search
 * @ioc: per adapter object
 * @handle: Firmware device handle
 *
 * Context: This function will acquire ioc->pcie_device_lock and will release
 * before returning the pcie_device object.
 *
 * This searches for pcie_device based on handle, then return pcie_device
 * object.
 */
struct _pcie_device *
mpt3sas_get_pdev_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _pcie_device *pcie_device;
	unsigned long flags;

	spin_lock_irqsave(&ioc->pcie_device_lock, flags);
	pcie_device = __mpt3sas_get_pdev_by_handle(ioc, handle);
	spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);

	return pcie_device;
}

/**
 * _scsih_set_nvme_max_shutdown_latency - Update max_shutdown_latency.
 * @ioc: per adapter object
 * Context: This function will acquire ioc->pcie_device_lock
 *
 * Update ioc->max_shutdown_latency to that NVMe drives RTD3 Entry Latency
 * which has reported maximum among all available NVMe drives.
 * Minimum max_shutdown_latency will be six seconds.
 */
static void
_scsih_set_nvme_max_shutdown_latency(struct MPT3SAS_ADAPTER *ioc)
{
	struct _pcie_device *pcie_device;
	unsigned long flags;
	u16 shutdown_latency = IO_UNIT_CONTROL_SHUTDOWN_TIMEOUT;

	spin_lock_irqsave(&ioc->pcie_device_lock, flags);
	list_for_each_entry(pcie_device, &ioc->pcie_device_list, list) {
		if (pcie_device->shutdown_latency) {
			if (shutdown_latency < pcie_device->shutdown_latency)
				shutdown_latency =
					pcie_device->shutdown_latency;
		}
	}
	ioc->max_shutdown_latency = shutdown_latency;
	spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
}

/**
 * _scsih_pcie_device_remove - remove pcie_device from list.
 * @ioc: per adapter object
 * @pcie_device: the pcie_device object
 * Context: This function will acquire ioc->pcie_device_lock.
 *
 * If pcie_device is on the list, remove it and decrement its reference count.
 */
static void
_scsih_pcie_device_remove(struct MPT3SAS_ADAPTER *ioc,
	struct _pcie_device *pcie_device)
{
	unsigned long flags;
	int was_on_pcie_device_list = 0;
	u8 update_latency = 0;

	if (!pcie_device)
		return;
	ioc_info(ioc, "removing handle(0x%04x), wwid(0x%016llx)\n",
		 pcie_device->handle, (u64)pcie_device->wwid);
	if (pcie_device->enclosure_handle != 0)
		ioc_info(ioc, "removing enclosure logical id(0x%016llx), slot(%d)\n",
			 (u64)pcie_device->enclosure_logical_id,
			 pcie_device->slot);
	if (pcie_device->connector_name[0] != '\0')
		ioc_info(ioc, "removing enclosure level(0x%04x), connector name( %s)\n",
			 pcie_device->enclosure_level,
			 pcie_device->connector_name);

	spin_lock_irqsave(&ioc->pcie_device_lock, flags);
	if (!list_empty(&pcie_device->list)) {
		list_del_init(&pcie_device->list);
		was_on_pcie_device_list = 1;
	}
	if (pcie_device->shutdown_latency == ioc->max_shutdown_latency)
		update_latency = 1;
	spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
	if (was_on_pcie_device_list) {
		kfree(pcie_device->serial_number);
		pcie_device_put(pcie_device);
	}

	/*
	 * This device's RTD3 Entry Latency matches IOC's
	 * max_shutdown_latency. Recalculate IOC's max_shutdown_latency
	 * from the available drives as current drive is getting removed.
	 */
	if (update_latency)
		_scsih_set_nvme_max_shutdown_latency(ioc);
}


/**
 * _scsih_pcie_device_remove_by_handle - removing pcie device object by handle
 * @ioc: per adapter object
 * @handle: device handle
 */
static void
_scsih_pcie_device_remove_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _pcie_device *pcie_device;
	unsigned long flags;
	int was_on_pcie_device_list = 0;
	u8 update_latency = 0;

	if (ioc->shost_recovery)
		return;

	spin_lock_irqsave(&ioc->pcie_device_lock, flags);
	pcie_device = __mpt3sas_get_pdev_by_handle(ioc, handle);
	if (pcie_device) {
		if (!list_empty(&pcie_device->list)) {
			list_del_init(&pcie_device->list);
			was_on_pcie_device_list = 1;
			pcie_device_put(pcie_device);
		}
		if (pcie_device->shutdown_latency == ioc->max_shutdown_latency)
			update_latency = 1;
	}
	spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
	if (was_on_pcie_device_list) {
		_scsih_pcie_device_remove_from_sml(ioc, pcie_device);
		pcie_device_put(pcie_device);
	}

	/*
	 * This device's RTD3 Entry Latency matches IOC's
	 * max_shutdown_latency. Recalculate IOC's max_shutdown_latency
	 * from the available drives as current drive is getting removed.
	 */
	if (update_latency)
		_scsih_set_nvme_max_shutdown_latency(ioc);
}

/**
 * _scsih_pcie_device_add - add pcie_device object
 * @ioc: per adapter object
 * @pcie_device: pcie_device object
 *
 * This is added to the pcie_device_list link list.
 */
static void
_scsih_pcie_device_add(struct MPT3SAS_ADAPTER *ioc,
	struct _pcie_device *pcie_device)
{
	unsigned long flags;

	dewtprintk(ioc,
		   ioc_info(ioc, "%s: handle (0x%04x), wwid(0x%016llx)\n",
			    __func__,
			    pcie_device->handle, (u64)pcie_device->wwid));
	if (pcie_device->enclosure_handle != 0)
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: enclosure logical id(0x%016llx), slot( %d)\n",
				    __func__,
				    (u64)pcie_device->enclosure_logical_id,
				    pcie_device->slot));
	if (pcie_device->connector_name[0] != '\0')
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: enclosure level(0x%04x), connector name( %s)\n",
				    __func__, pcie_device->enclosure_level,
				    pcie_device->connector_name));

	spin_lock_irqsave(&ioc->pcie_device_lock, flags);
	pcie_device_get(pcie_device);
	list_add_tail(&pcie_device->list, &ioc->pcie_device_list);
	spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);

	if (pcie_device->access_status ==
	    MPI26_PCIEDEV0_ASTATUS_DEVICE_BLOCKED) {
		clear_bit(pcie_device->handle, ioc->pend_os_device_add);
		return;
	}
	if (scsi_add_device(ioc->shost, PCIE_CHANNEL, pcie_device->id, 0)) {
		_scsih_pcie_device_remove(ioc, pcie_device);
	} else if (!pcie_device->starget) {
		if (!ioc->is_driver_loading) {
/*TODO-- Need to find out whether this condition will occur or not*/
			clear_bit(pcie_device->handle, ioc->pend_os_device_add);
		}
	} else
		clear_bit(pcie_device->handle, ioc->pend_os_device_add);
}

/*
 * _scsih_pcie_device_init_add - insert pcie_device to the init list.
 * @ioc: per adapter object
 * @pcie_device: the pcie_device object
 * Context: This function will acquire ioc->pcie_device_lock.
 *
 * Adding new object at driver load time to the ioc->pcie_device_init_list.
 */
static void
_scsih_pcie_device_init_add(struct MPT3SAS_ADAPTER *ioc,
				struct _pcie_device *pcie_device)
{
	unsigned long flags;

	dewtprintk(ioc,
		   ioc_info(ioc, "%s: handle (0x%04x), wwid(0x%016llx)\n",
			    __func__,
			    pcie_device->handle, (u64)pcie_device->wwid));
	if (pcie_device->enclosure_handle != 0)
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: enclosure logical id(0x%016llx), slot( %d)\n",
				    __func__,
				    (u64)pcie_device->enclosure_logical_id,
				    pcie_device->slot));
	if (pcie_device->connector_name[0] != '\0')
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: enclosure level(0x%04x), connector name( %s)\n",
				    __func__, pcie_device->enclosure_level,
				    pcie_device->connector_name));

	spin_lock_irqsave(&ioc->pcie_device_lock, flags);
	pcie_device_get(pcie_device);
	list_add_tail(&pcie_device->list, &ioc->pcie_device_init_list);
	if (pcie_device->access_status !=
	    MPI26_PCIEDEV0_ASTATUS_DEVICE_BLOCKED)
		_scsih_determine_boot_device(ioc, pcie_device, PCIE_CHANNEL);
	spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
}
/**
 * _scsih_raid_device_find_by_id - raid device search
 * @ioc: per adapter object
 * @id: sas device target id
 * @channel: sas device channel
 * Context: Calling function should acquire ioc->raid_device_lock
 *
 * This searches for raid_device based on target id, then return raid_device
 * object.
 */
static struct _raid_device *
_scsih_raid_device_find_by_id(struct MPT3SAS_ADAPTER *ioc, int id, int channel)
{
	struct _raid_device *raid_device, *r;

	r = NULL;
	list_for_each_entry(raid_device, &ioc->raid_device_list, list) {
		if (raid_device->id == id && raid_device->channel == channel) {
			r = raid_device;
			goto out;
		}
	}

 out:
	return r;
}

/**
 * mpt3sas_raid_device_find_by_handle - raid device search
 * @ioc: per adapter object
 * @handle: sas device handle (assigned by firmware)
 * Context: Calling function should acquire ioc->raid_device_lock
 *
 * This searches for raid_device based on handle, then return raid_device
 * object.
 */
struct _raid_device *
mpt3sas_raid_device_find_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _raid_device *raid_device, *r;

	r = NULL;
	list_for_each_entry(raid_device, &ioc->raid_device_list, list) {
		if (raid_device->handle != handle)
			continue;
		r = raid_device;
		goto out;
	}

 out:
	return r;
}

/**
 * _scsih_raid_device_find_by_wwid - raid device search
 * @ioc: per adapter object
 * @wwid: ?
 * Context: Calling function should acquire ioc->raid_device_lock
 *
 * This searches for raid_device based on wwid, then return raid_device
 * object.
 */
static struct _raid_device *
_scsih_raid_device_find_by_wwid(struct MPT3SAS_ADAPTER *ioc, u64 wwid)
{
	struct _raid_device *raid_device, *r;

	r = NULL;
	list_for_each_entry(raid_device, &ioc->raid_device_list, list) {
		if (raid_device->wwid != wwid)
			continue;
		r = raid_device;
		goto out;
	}

 out:
	return r;
}

/**
 * _scsih_raid_device_add - add raid_device object
 * @ioc: per adapter object
 * @raid_device: raid_device object
 *
 * This is added to the raid_device_list link list.
 */
static void
_scsih_raid_device_add(struct MPT3SAS_ADAPTER *ioc,
	struct _raid_device *raid_device)
{
	unsigned long flags;

	dewtprintk(ioc,
		   ioc_info(ioc, "%s: handle(0x%04x), wwid(0x%016llx)\n",
			    __func__,
			    raid_device->handle, (u64)raid_device->wwid));

	spin_lock_irqsave(&ioc->raid_device_lock, flags);
	list_add_tail(&raid_device->list, &ioc->raid_device_list);
	spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
}

/**
 * _scsih_raid_device_remove - delete raid_device object
 * @ioc: per adapter object
 * @raid_device: raid_device object
 *
 */
static void
_scsih_raid_device_remove(struct MPT3SAS_ADAPTER *ioc,
	struct _raid_device *raid_device)
{
	unsigned long flags;

	spin_lock_irqsave(&ioc->raid_device_lock, flags);
	list_del(&raid_device->list);
	kfree(raid_device);
	spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
}

/**
 * mpt3sas_scsih_expander_find_by_handle - expander device search
 * @ioc: per adapter object
 * @handle: expander handle (assigned by firmware)
 * Context: Calling function should acquire ioc->sas_device_lock
 *
 * This searches for expander device based on handle, then returns the
 * sas_node object.
 */
struct _sas_node *
mpt3sas_scsih_expander_find_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _sas_node *sas_expander, *r;

	r = NULL;
	list_for_each_entry(sas_expander, &ioc->sas_expander_list, list) {
		if (sas_expander->handle != handle)
			continue;
		r = sas_expander;
		goto out;
	}
 out:
	return r;
}

/**
 * mpt3sas_scsih_enclosure_find_by_handle - exclosure device search
 * @ioc: per adapter object
 * @handle: enclosure handle (assigned by firmware)
 * Context: Calling function should acquire ioc->sas_device_lock
 *
 * This searches for enclosure device based on handle, then returns the
 * enclosure object.
 */
static struct _enclosure_node *
mpt3sas_scsih_enclosure_find_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _enclosure_node *enclosure_dev, *r;

	r = NULL;
	list_for_each_entry(enclosure_dev, &ioc->enclosure_list, list) {
		if (le16_to_cpu(enclosure_dev->pg0.EnclosureHandle) != handle)
			continue;
		r = enclosure_dev;
		goto out;
	}
out:
	return r;
}
/**
 * mpt3sas_scsih_expander_find_by_sas_address - expander device search
 * @ioc: per adapter object
 * @sas_address: sas address
 * @port: hba port entry
 * Context: Calling function should acquire ioc->sas_node_lock.
 *
 * This searches for expander device based on sas_address & port number,
 * then returns the sas_node object.
 */
struct _sas_node *
mpt3sas_scsih_expander_find_by_sas_address(struct MPT3SAS_ADAPTER *ioc,
	u64 sas_address, struct hba_port *port)
{
	struct _sas_node *sas_expander, *r = NULL;

	if (!port)
		return r;

	list_for_each_entry(sas_expander, &ioc->sas_expander_list, list) {
		if (sas_expander->sas_address != sas_address)
			continue;
		if (sas_expander->port != port)
			continue;
		r = sas_expander;
		goto out;
	}
 out:
	return r;
}

/**
 * _scsih_expander_node_add - insert expander device to the list.
 * @ioc: per adapter object
 * @sas_expander: the sas_device object
 * Context: This function will acquire ioc->sas_node_lock.
 *
 * Adding new object to the ioc->sas_expander_list.
 */
static void
_scsih_expander_node_add(struct MPT3SAS_ADAPTER *ioc,
	struct _sas_node *sas_expander)
{
	unsigned long flags;

	spin_lock_irqsave(&ioc->sas_node_lock, flags);
	list_add_tail(&sas_expander->list, &ioc->sas_expander_list);
	spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
}

/**
 * _scsih_is_end_device - determines if device is an end device
 * @device_info: bitfield providing information about the device.
 * Context: none
 *
 * Return: 1 if end device.
 */
static int
_scsih_is_end_device(u32 device_info)
{
	if (device_info & MPI2_SAS_DEVICE_INFO_END_DEVICE &&
		((device_info & MPI2_SAS_DEVICE_INFO_SSP_TARGET) |
		(device_info & MPI2_SAS_DEVICE_INFO_STP_TARGET) |
		(device_info & MPI2_SAS_DEVICE_INFO_SATA_DEVICE)))
		return 1;
	else
		return 0;
}

/**
 * _scsih_is_nvme_pciescsi_device - determines if
 *			device is an pcie nvme/scsi device
 * @device_info: bitfield providing information about the device.
 * Context: none
 *
 * Returns 1 if device is pcie device type nvme/scsi.
 */
static int
_scsih_is_nvme_pciescsi_device(u32 device_info)
{
	if (((device_info & MPI26_PCIE_DEVINFO_MASK_DEVICE_TYPE)
	    == MPI26_PCIE_DEVINFO_NVME) ||
	    ((device_info & MPI26_PCIE_DEVINFO_MASK_DEVICE_TYPE)
	    == MPI26_PCIE_DEVINFO_SCSI))
		return 1;
	else
		return 0;
}

/**
 * _scsih_scsi_lookup_find_by_target - search for matching channel:id
 * @ioc: per adapter object
 * @id: target id
 * @channel: channel
 * Context: This function will acquire ioc->scsi_lookup_lock.
 *
 * This will search for a matching channel:id in the scsi_lookup array,
 * returning 1 if found.
 */
static u8
_scsih_scsi_lookup_find_by_target(struct MPT3SAS_ADAPTER *ioc, int id,
	int channel)
{
	int smid;
	struct scsi_cmnd *scmd;

	for (smid = 1;
	     smid <= ioc->shost->can_queue; smid++) {
		scmd = mpt3sas_scsih_scsi_lookup_get(ioc, smid);
		if (!scmd)
			continue;
		if (scmd->device->id == id &&
		    scmd->device->channel == channel)
			return 1;
	}
	return 0;
}

/**
 * _scsih_scsi_lookup_find_by_lun - search for matching channel:id:lun
 * @ioc: per adapter object
 * @id: target id
 * @lun: lun number
 * @channel: channel
 * Context: This function will acquire ioc->scsi_lookup_lock.
 *
 * This will search for a matching channel:id:lun in the scsi_lookup array,
 * returning 1 if found.
 */
static u8
_scsih_scsi_lookup_find_by_lun(struct MPT3SAS_ADAPTER *ioc, int id,
	unsigned int lun, int channel)
{
	int smid;
	struct scsi_cmnd *scmd;

	for (smid = 1; smid <= ioc->shost->can_queue; smid++) {

		scmd = mpt3sas_scsih_scsi_lookup_get(ioc, smid);
		if (!scmd)
			continue;
		if (scmd->device->id == id &&
		    scmd->device->channel == channel &&
		    scmd->device->lun == lun)
			return 1;
	}
	return 0;
}

/**
 * mpt3sas_scsih_scsi_lookup_get - returns scmd entry
 * @ioc: per adapter object
 * @smid: system request message index
 *
 * Return: the smid stored scmd pointer.
 * Then will dereference the stored scmd pointer.
 */
struct scsi_cmnd *
mpt3sas_scsih_scsi_lookup_get(struct MPT3SAS_ADAPTER *ioc, u16 smid)
{
	struct scsi_cmnd *scmd = NULL;
	struct scsiio_tracker *st;
	Mpi25SCSIIORequest_t *mpi_request;
	u16 tag = smid - 1;

	if (smid > 0  &&
	    smid <= ioc->scsiio_depth - INTERNAL_SCSIIO_CMDS_COUNT) {
		u32 unique_tag =
		    ioc->io_queue_num[tag] << BLK_MQ_UNIQUE_TAG_BITS | tag;

		mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);

		/*
		 * If SCSI IO request is outstanding at driver level then
		 * DevHandle filed must be non-zero. If DevHandle is zero
		 * then it means that this smid is free at driver level,
		 * so return NULL.
		 */
		if (!mpi_request->DevHandle)
			return scmd;

		scmd = scsi_host_find_tag(ioc->shost, unique_tag);
		if (scmd) {
			st = scsi_cmd_priv(scmd);
			if (st->cb_idx == 0xFF || st->smid == 0)
				scmd = NULL;
		}
	}
	return scmd;
}

/**
 * scsih_change_queue_depth - setting device queue depth
 * @sdev: scsi device struct
 * @qdepth: requested queue depth
 *
 * Return: queue depth.
 */
static int
scsih_change_queue_depth(struct scsi_device *sdev, int qdepth)
{
	struct Scsi_Host *shost = sdev->host;
	int max_depth;
	struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct MPT3SAS_TARGET *sas_target_priv_data;
	struct _sas_device *sas_device;
	unsigned long flags;

	max_depth = shost->can_queue;

	/*
	 * limit max device queue for SATA to 32 if enable_sdev_max_qd
	 * is disabled.
	 */
	if (ioc->enable_sdev_max_qd || ioc->is_gen35_ioc)
		goto not_sata;

	sas_device_priv_data = sdev->hostdata;
	if (!sas_device_priv_data)
		goto not_sata;
	sas_target_priv_data = sas_device_priv_data->sas_target;
	if (!sas_target_priv_data)
		goto not_sata;
	if ((sas_target_priv_data->flags & MPT_TARGET_FLAGS_VOLUME))
		goto not_sata;

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device = __mpt3sas_get_sdev_from_target(ioc, sas_target_priv_data);
	if (sas_device) {
		if (sas_device->device_info & MPI2_SAS_DEVICE_INFO_SATA_DEVICE)
			max_depth = MPT3SAS_SATA_QUEUE_DEPTH;

		sas_device_put(sas_device);
	}
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);

 not_sata:

	if (!sdev->tagged_supported)
		max_depth = 1;
	if (qdepth > max_depth)
		qdepth = max_depth;
	scsi_change_queue_depth(sdev, qdepth);
	sdev_printk(KERN_INFO, sdev,
	    "qdepth(%d), tagged(%d), scsi_level(%d), cmd_que(%d)\n",
	    sdev->queue_depth, sdev->tagged_supported,
	    sdev->scsi_level, ((sdev->inquiry[7] & 2) >> 1));
	return sdev->queue_depth;
}

/**
 * mpt3sas_scsih_change_queue_depth - setting device queue depth
 * @sdev: scsi device struct
 * @qdepth: requested queue depth
 *
 * Returns nothing.
 */
void
mpt3sas_scsih_change_queue_depth(struct scsi_device *sdev, int qdepth)
{
	struct Scsi_Host *shost = sdev->host;
	struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);

	if (ioc->enable_sdev_max_qd)
		qdepth = shost->can_queue;

	scsih_change_queue_depth(sdev, qdepth);
}

/**
 * scsih_target_alloc - target add routine
 * @starget: scsi target struct
 *
 * Return: 0 if ok. Any other return is assumed to be an error and
 * the device is ignored.
 */
static int
scsih_target_alloc(struct scsi_target *starget)
{
	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
	struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
	struct MPT3SAS_TARGET *sas_target_priv_data;
	struct _sas_device *sas_device;
	struct _raid_device *raid_device;
	struct _pcie_device *pcie_device;
	unsigned long flags;
	struct sas_rphy *rphy;

	sas_target_priv_data = kzalloc(sizeof(*sas_target_priv_data),
				       GFP_KERNEL);
	if (!sas_target_priv_data)
		return -ENOMEM;

	starget->hostdata = sas_target_priv_data;
	sas_target_priv_data->starget = starget;
	sas_target_priv_data->handle = MPT3SAS_INVALID_DEVICE_HANDLE;

	/* RAID volumes */
	if (starget->channel == RAID_CHANNEL) {
		spin_lock_irqsave(&ioc->raid_device_lock, flags);
		raid_device = _scsih_raid_device_find_by_id(ioc, starget->id,
		    starget->channel);
		if (raid_device) {
			sas_target_priv_data->handle = raid_device->handle;
			sas_target_priv_data->sas_address = raid_device->wwid;
			sas_target_priv_data->flags |= MPT_TARGET_FLAGS_VOLUME;
			if (ioc->is_warpdrive)
				sas_target_priv_data->raid_device = raid_device;
			raid_device->starget = starget;
		}
		spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
		return 0;
	}

	/* PCIe devices */
	if (starget->channel == PCIE_CHANNEL) {
		spin_lock_irqsave(&ioc->pcie_device_lock, flags);
		pcie_device = __mpt3sas_get_pdev_by_idchannel(ioc, starget->id,
			starget->channel);
		if (pcie_device) {
			sas_target_priv_data->handle = pcie_device->handle;
			sas_target_priv_data->sas_address = pcie_device->wwid;
			sas_target_priv_data->port = NULL;
			sas_target_priv_data->pcie_dev = pcie_device;
			pcie_device->starget = starget;
			pcie_device->id = starget->id;
			pcie_device->channel = starget->channel;
			sas_target_priv_data->flags |=
				MPT_TARGET_FLAGS_PCIE_DEVICE;
			if (pcie_device->fast_path)
				sas_target_priv_data->flags |=
					MPT_TARGET_FASTPATH_IO;
		}
		spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
		return 0;
	}

	/* sas/sata devices */
	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	rphy = dev_to_rphy(starget->dev.parent);
	sas_device = __mpt3sas_get_sdev_by_rphy(ioc, rphy);

	if (sas_device) {
		sas_target_priv_data->handle = sas_device->handle;
		sas_target_priv_data->sas_address = sas_device->sas_address;
		sas_target_priv_data->port = sas_device->port;
		sas_target_priv_data->sas_dev = sas_device;
		sas_device->starget = starget;
		sas_device->id = starget->id;
		sas_device->channel = starget->channel;
		if (test_bit(sas_device->handle, ioc->pd_handles))
			sas_target_priv_data->flags |=
			    MPT_TARGET_FLAGS_RAID_COMPONENT;
		if (sas_device->fast_path)
			sas_target_priv_data->flags |=
					MPT_TARGET_FASTPATH_IO;
	}
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);

	return 0;
}

/**
 * scsih_target_destroy - target destroy routine
 * @starget: scsi target struct
 */
static void
scsih_target_destroy(struct scsi_target *starget)
{
	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
	struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
	struct MPT3SAS_TARGET *sas_target_priv_data;
	struct _sas_device *sas_device;
	struct _raid_device *raid_device;
	struct _pcie_device *pcie_device;
	unsigned long flags;

	sas_target_priv_data = starget->hostdata;
	if (!sas_target_priv_data)
		return;

	if (starget->channel == RAID_CHANNEL) {
		spin_lock_irqsave(&ioc->raid_device_lock, flags);
		raid_device = _scsih_raid_device_find_by_id(ioc, starget->id,
		    starget->channel);
		if (raid_device) {
			raid_device->starget = NULL;
			raid_device->sdev = NULL;
		}
		spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
		goto out;
	}

	if (starget->channel == PCIE_CHANNEL) {
		spin_lock_irqsave(&ioc->pcie_device_lock, flags);
		pcie_device = __mpt3sas_get_pdev_from_target(ioc,
							sas_target_priv_data);
		if (pcie_device && (pcie_device->starget == starget) &&
			(pcie_device->id == starget->id) &&
			(pcie_device->channel == starget->channel))
			pcie_device->starget = NULL;

		if (pcie_device) {
			/*
			 * Corresponding get() is in _scsih_target_alloc()
			 */
			sas_target_priv_data->pcie_dev = NULL;
			pcie_device_put(pcie_device);
			pcie_device_put(pcie_device);
		}
		spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
		goto out;
	}

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device = __mpt3sas_get_sdev_from_target(ioc, sas_target_priv_data);
	if (sas_device && (sas_device->starget == starget) &&
	    (sas_device->id == starget->id) &&
	    (sas_device->channel == starget->channel))
		sas_device->starget = NULL;

	if (sas_device) {
		/*
		 * Corresponding get() is in _scsih_target_alloc()
		 */
		sas_target_priv_data->sas_dev = NULL;
		sas_device_put(sas_device);

		sas_device_put(sas_device);
	}
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);

 out:
	kfree(sas_target_priv_data);
	starget->hostdata = NULL;
}

/**
 * scsih_slave_alloc - device add routine
 * @sdev: scsi device struct
 *
 * Return: 0 if ok. Any other return is assumed to be an error and
 * the device is ignored.
 */
static int
scsih_slave_alloc(struct scsi_device *sdev)
{
	struct Scsi_Host *shost;
	struct MPT3SAS_ADAPTER *ioc;
	struct MPT3SAS_TARGET *sas_target_priv_data;
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct scsi_target *starget;
	struct _raid_device *raid_device;
	struct _sas_device *sas_device;
	struct _pcie_device *pcie_device;
	unsigned long flags;

	sas_device_priv_data = kzalloc(sizeof(*sas_device_priv_data),
				       GFP_KERNEL);
	if (!sas_device_priv_data)
		return -ENOMEM;

	sas_device_priv_data->lun = sdev->lun;
	sas_device_priv_data->flags = MPT_DEVICE_FLAGS_INIT;

	starget = scsi_target(sdev);
	sas_target_priv_data = starget->hostdata;
	sas_target_priv_data->num_luns++;
	sas_device_priv_data->sas_target = sas_target_priv_data;
	sdev->hostdata = sas_device_priv_data;
	if ((sas_target_priv_data->flags & MPT_TARGET_FLAGS_RAID_COMPONENT))
		sdev->no_uld_attach = 1;

	shost = dev_to_shost(&starget->dev);
	ioc = shost_priv(shost);
	if (starget->channel == RAID_CHANNEL) {
		spin_lock_irqsave(&ioc->raid_device_lock, flags);
		raid_device = _scsih_raid_device_find_by_id(ioc,
		    starget->id, starget->channel);
		if (raid_device)
			raid_device->sdev = sdev; /* raid is single lun */
		spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
	}
	if (starget->channel == PCIE_CHANNEL) {
		spin_lock_irqsave(&ioc->pcie_device_lock, flags);
		pcie_device = __mpt3sas_get_pdev_by_wwid(ioc,
				sas_target_priv_data->sas_address);
		if (pcie_device && (pcie_device->starget == NULL)) {
			sdev_printk(KERN_INFO, sdev,
			    "%s : pcie_device->starget set to starget @ %d\n",
			    __func__, __LINE__);
			pcie_device->starget = starget;
		}

		if (pcie_device)
			pcie_device_put(pcie_device);
		spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);

	} else  if (!(sas_target_priv_data->flags & MPT_TARGET_FLAGS_VOLUME)) {
		spin_lock_irqsave(&ioc->sas_device_lock, flags);
		sas_device = __mpt3sas_get_sdev_by_addr(ioc,
		    sas_target_priv_data->sas_address,
		    sas_target_priv_data->port);
		if (sas_device && (sas_device->starget == NULL)) {
			sdev_printk(KERN_INFO, sdev,
			"%s : sas_device->starget set to starget @ %d\n",
			     __func__, __LINE__);
			sas_device->starget = starget;
		}

		if (sas_device)
			sas_device_put(sas_device);

		spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
	}

	return 0;
}

/**
 * scsih_slave_destroy - device destroy routine
 * @sdev: scsi device struct
 */
static void
scsih_slave_destroy(struct scsi_device *sdev)
{
	struct MPT3SAS_TARGET *sas_target_priv_data;
	struct scsi_target *starget;
	struct Scsi_Host *shost;
	struct MPT3SAS_ADAPTER *ioc;
	struct _sas_device *sas_device;
	struct _pcie_device *pcie_device;
	unsigned long flags;

	if (!sdev->hostdata)
		return;

	starget = scsi_target(sdev);
	sas_target_priv_data = starget->hostdata;
	sas_target_priv_data->num_luns--;

	shost = dev_to_shost(&starget->dev);
	ioc = shost_priv(shost);

	if (sas_target_priv_data->flags & MPT_TARGET_FLAGS_PCIE_DEVICE) {
		spin_lock_irqsave(&ioc->pcie_device_lock, flags);
		pcie_device = __mpt3sas_get_pdev_from_target(ioc,
				sas_target_priv_data);
		if (pcie_device && !sas_target_priv_data->num_luns)
			pcie_device->starget = NULL;

		if (pcie_device)
			pcie_device_put(pcie_device);

		spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);

	} else if (!(sas_target_priv_data->flags & MPT_TARGET_FLAGS_VOLUME)) {
		spin_lock_irqsave(&ioc->sas_device_lock, flags);
		sas_device = __mpt3sas_get_sdev_from_target(ioc,
				sas_target_priv_data);
		if (sas_device && !sas_target_priv_data->num_luns)
			sas_device->starget = NULL;

		if (sas_device)
			sas_device_put(sas_device);
		spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
	}

	kfree(sdev->hostdata);
	sdev->hostdata = NULL;
}

/**
 * _scsih_display_sata_capabilities - sata capabilities
 * @ioc: per adapter object
 * @handle: device handle
 * @sdev: scsi device struct
 */
static void
_scsih_display_sata_capabilities(struct MPT3SAS_ADAPTER *ioc,
	u16 handle, struct scsi_device *sdev)
{
	Mpi2ConfigReply_t mpi_reply;
	Mpi2SasDevicePage0_t sas_device_pg0;
	u32 ioc_status;
	u16 flags;
	u32 device_info;

	if ((mpt3sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
	    MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, handle))) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return;
	}

	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
	    MPI2_IOCSTATUS_MASK;
	if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return;
	}

	flags = le16_to_cpu(sas_device_pg0.Flags);
	device_info = le32_to_cpu(sas_device_pg0.DeviceInfo);

	sdev_printk(KERN_INFO, sdev,
	    "atapi(%s), ncq(%s), asyn_notify(%s), smart(%s), fua(%s), "
	    "sw_preserve(%s)\n",
	    (device_info & MPI2_SAS_DEVICE_INFO_ATAPI_DEVICE) ? "y" : "n",
	    (flags & MPI2_SAS_DEVICE0_FLAGS_SATA_NCQ_SUPPORTED) ? "y" : "n",
	    (flags & MPI2_SAS_DEVICE0_FLAGS_SATA_ASYNCHRONOUS_NOTIFY) ? "y" :
	    "n",
	    (flags & MPI2_SAS_DEVICE0_FLAGS_SATA_SMART_SUPPORTED) ? "y" : "n",
	    (flags & MPI2_SAS_DEVICE0_FLAGS_SATA_FUA_SUPPORTED) ? "y" : "n",
	    (flags & MPI2_SAS_DEVICE0_FLAGS_SATA_SW_PRESERVE) ? "y" : "n");
}

/*
 * raid transport support -
 * Enabled for SLES11 and newer, in older kernels the driver will panic when
 * unloading the driver followed by a load - I believe that the subroutine
 * raid_class_release() is not cleaning up properly.
 */

/**
 * scsih_is_raid - return boolean indicating device is raid volume
 * @dev: the device struct object
 */
static int
scsih_is_raid(struct device *dev)
{
	struct scsi_device *sdev = to_scsi_device(dev);
	struct MPT3SAS_ADAPTER *ioc = shost_priv(sdev->host);

	if (ioc->is_warpdrive)
		return 0;
	return (sdev->channel == RAID_CHANNEL) ? 1 : 0;
}

static int
scsih_is_nvme(struct device *dev)
{
	struct scsi_device *sdev = to_scsi_device(dev);

	return (sdev->channel == PCIE_CHANNEL) ? 1 : 0;
}

/**
 * scsih_get_resync - get raid volume resync percent complete
 * @dev: the device struct object
 */
static void
scsih_get_resync(struct device *dev)
{
	struct scsi_device *sdev = to_scsi_device(dev);
	struct MPT3SAS_ADAPTER *ioc = shost_priv(sdev->host);
	static struct _raid_device *raid_device;
	unsigned long flags;
	Mpi2RaidVolPage0_t vol_pg0;
	Mpi2ConfigReply_t mpi_reply;
	u32 volume_status_flags;
	u8 percent_complete;
	u16 handle;

	percent_complete = 0;
	handle = 0;
	if (ioc->is_warpdrive)
		goto out;

	spin_lock_irqsave(&ioc->raid_device_lock, flags);
	raid_device = _scsih_raid_device_find_by_id(ioc, sdev->id,
	    sdev->channel);
	if (raid_device) {
		handle = raid_device->handle;
		percent_complete = raid_device->percent_complete;
	}
	spin_unlock_irqrestore(&ioc->raid_device_lock, flags);

	if (!handle)
		goto out;

	if (mpt3sas_config_get_raid_volume_pg0(ioc, &mpi_reply, &vol_pg0,
	     MPI2_RAID_VOLUME_PGAD_FORM_HANDLE, handle,
	     sizeof(Mpi2RaidVolPage0_t))) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		percent_complete = 0;
		goto out;
	}

	volume_status_flags = le32_to_cpu(vol_pg0.VolumeStatusFlags);
	if (!(volume_status_flags &
	    MPI2_RAIDVOL0_STATUS_FLAG_RESYNC_IN_PROGRESS))
		percent_complete = 0;

 out:

	switch (ioc->hba_mpi_version_belonged) {
	case MPI2_VERSION:
		raid_set_resync(mpt2sas_raid_template, dev, percent_complete);
		break;
	case MPI25_VERSION:
	case MPI26_VERSION:
		raid_set_resync(mpt3sas_raid_template, dev, percent_complete);
		break;
	}
}

/**
 * scsih_get_state - get raid volume level
 * @dev: the device struct object
 */
static void
scsih_get_state(struct device *dev)
{
	struct scsi_device *sdev = to_scsi_device(dev);
	struct MPT3SAS_ADAPTER *ioc = shost_priv(sdev->host);
	static struct _raid_device *raid_device;
	unsigned long flags;
	Mpi2RaidVolPage0_t vol_pg0;
	Mpi2ConfigReply_t mpi_reply;
	u32 volstate;
	enum raid_state state = RAID_STATE_UNKNOWN;
	u16 handle = 0;

	spin_lock_irqsave(&ioc->raid_device_lock, flags);
	raid_device = _scsih_raid_device_find_by_id(ioc, sdev->id,
	    sdev->channel);
	if (raid_device)
		handle = raid_device->handle;
	spin_unlock_irqrestore(&ioc->raid_device_lock, flags);

	if (!raid_device)
		goto out;

	if (mpt3sas_config_get_raid_volume_pg0(ioc, &mpi_reply, &vol_pg0,
	     MPI2_RAID_VOLUME_PGAD_FORM_HANDLE, handle,
	     sizeof(Mpi2RaidVolPage0_t))) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		goto out;
	}

	volstate = le32_to_cpu(vol_pg0.VolumeStatusFlags);
	if (volstate & MPI2_RAIDVOL0_STATUS_FLAG_RESYNC_IN_PROGRESS) {
		state = RAID_STATE_RESYNCING;
		goto out;
	}

	switch (vol_pg0.VolumeState) {
	case MPI2_RAID_VOL_STATE_OPTIMAL:
	case MPI2_RAID_VOL_STATE_ONLINE:
		state = RAID_STATE_ACTIVE;
		break;
	case  MPI2_RAID_VOL_STATE_DEGRADED:
		state = RAID_STATE_DEGRADED;
		break;
	case MPI2_RAID_VOL_STATE_FAILED:
	case MPI2_RAID_VOL_STATE_MISSING:
		state = RAID_STATE_OFFLINE;
		break;
	}
 out:
	switch (ioc->hba_mpi_version_belonged) {
	case MPI2_VERSION:
		raid_set_state(mpt2sas_raid_template, dev, state);
		break;
	case MPI25_VERSION:
	case MPI26_VERSION:
		raid_set_state(mpt3sas_raid_template, dev, state);
		break;
	}
}

/**
 * _scsih_set_level - set raid level
 * @ioc: ?
 * @sdev: scsi device struct
 * @volume_type: volume type
 */
static void
_scsih_set_level(struct MPT3SAS_ADAPTER *ioc,
	struct scsi_device *sdev, u8 volume_type)
{
	enum raid_level level = RAID_LEVEL_UNKNOWN;

	switch (volume_type) {
	case MPI2_RAID_VOL_TYPE_RAID0:
		level = RAID_LEVEL_0;
		break;
	case MPI2_RAID_VOL_TYPE_RAID10:
		level = RAID_LEVEL_10;
		break;
	case MPI2_RAID_VOL_TYPE_RAID1E:
		level = RAID_LEVEL_1E;
		break;
	case MPI2_RAID_VOL_TYPE_RAID1:
		level = RAID_LEVEL_1;
		break;
	}

	switch (ioc->hba_mpi_version_belonged) {
	case MPI2_VERSION:
		raid_set_level(mpt2sas_raid_template,
			&sdev->sdev_gendev, level);
		break;
	case MPI25_VERSION:
	case MPI26_VERSION:
		raid_set_level(mpt3sas_raid_template,
			&sdev->sdev_gendev, level);
		break;
	}
}


/**
 * _scsih_get_volume_capabilities - volume capabilities
 * @ioc: per adapter object
 * @raid_device: the raid_device object
 *
 * Return: 0 for success, else 1
 */
static int
_scsih_get_volume_capabilities(struct MPT3SAS_ADAPTER *ioc,
	struct _raid_device *raid_device)
{
	Mpi2RaidVolPage0_t *vol_pg0;
	Mpi2RaidPhysDiskPage0_t pd_pg0;
	Mpi2SasDevicePage0_t sas_device_pg0;
	Mpi2ConfigReply_t mpi_reply;
	u16 sz;
	u8 num_pds;

	if ((mpt3sas_config_get_number_pds(ioc, raid_device->handle,
	    &num_pds)) || !num_pds) {
		dfailprintk(ioc,
			    ioc_warn(ioc, "failure at %s:%d/%s()!\n",
				     __FILE__, __LINE__, __func__));
		return 1;
	}

	raid_device->num_pds = num_pds;
	sz = offsetof(Mpi2RaidVolPage0_t, PhysDisk) + (num_pds *
	    sizeof(Mpi2RaidVol0PhysDisk_t));
	vol_pg0 = kzalloc(sz, GFP_KERNEL);
	if (!vol_pg0) {
		dfailprintk(ioc,
			    ioc_warn(ioc, "failure at %s:%d/%s()!\n",
				     __FILE__, __LINE__, __func__));
		return 1;
	}

	if ((mpt3sas_config_get_raid_volume_pg0(ioc, &mpi_reply, vol_pg0,
	     MPI2_RAID_VOLUME_PGAD_FORM_HANDLE, raid_device->handle, sz))) {
		dfailprintk(ioc,
			    ioc_warn(ioc, "failure at %s:%d/%s()!\n",
				     __FILE__, __LINE__, __func__));
		kfree(vol_pg0);
		return 1;
	}

	raid_device->volume_type = vol_pg0->VolumeType;

	/* figure out what the underlying devices are by
	 * obtaining the device_info bits for the 1st device
	 */
	if (!(mpt3sas_config_get_phys_disk_pg0(ioc, &mpi_reply,
	    &pd_pg0, MPI2_PHYSDISK_PGAD_FORM_PHYSDISKNUM,
	    vol_pg0->PhysDisk[0].PhysDiskNum))) {
		if (!(mpt3sas_config_get_sas_device_pg0(ioc, &mpi_reply,
		    &sas_device_pg0, MPI2_SAS_DEVICE_PGAD_FORM_HANDLE,
		    le16_to_cpu(pd_pg0.DevHandle)))) {
			raid_device->device_info =
			    le32_to_cpu(sas_device_pg0.DeviceInfo);
		}
	}

	kfree(vol_pg0);
	return 0;
}

/**
 * _scsih_enable_tlr - setting TLR flags
 * @ioc: per adapter object
 * @sdev: scsi device struct
 *
 * Enabling Transaction Layer Retries for tape devices when
 * vpd page 0x90 is present
 *
 */
static void
_scsih_enable_tlr(struct MPT3SAS_ADAPTER *ioc, struct scsi_device *sdev)
{

	/* only for TAPE */
	if (sdev->type != TYPE_TAPE)
		return;

	if (!(ioc->facts.IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_TLR))
		return;

	sas_enable_tlr(sdev);
	sdev_printk(KERN_INFO, sdev, "TLR %s\n",
	    sas_is_tlr_enabled(sdev) ? "Enabled" : "Disabled");
	return;

}

/**
 * scsih_slave_configure - device configure routine.
 * @sdev: scsi device struct
 *
 * Return: 0 if ok. Any other return is assumed to be an error and
 * the device is ignored.
 */
static int
scsih_slave_configure(struct scsi_device *sdev)
{
	struct Scsi_Host *shost = sdev->host;
	struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct MPT3SAS_TARGET *sas_target_priv_data;
	struct _sas_device *sas_device;
	struct _pcie_device *pcie_device;
	struct _raid_device *raid_device;
	unsigned long flags;
	int qdepth;
	u8 ssp_target = 0;
	char *ds = "";
	char *r_level = "";
	u16 handle, volume_handle = 0;
	u64 volume_wwid = 0;

	qdepth = 1;
	sas_device_priv_data = sdev->hostdata;
	sas_device_priv_data->configured_lun = 1;
	sas_device_priv_data->flags &= ~MPT_DEVICE_FLAGS_INIT;
	sas_target_priv_data = sas_device_priv_data->sas_target;
	handle = sas_target_priv_data->handle;

	/* raid volume handling */
	if (sas_target_priv_data->flags & MPT_TARGET_FLAGS_VOLUME) {

		spin_lock_irqsave(&ioc->raid_device_lock, flags);
		raid_device = mpt3sas_raid_device_find_by_handle(ioc, handle);
		spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
		if (!raid_device) {
			dfailprintk(ioc,
				    ioc_warn(ioc, "failure at %s:%d/%s()!\n",
					     __FILE__, __LINE__, __func__));
			return 1;
		}

		if (_scsih_get_volume_capabilities(ioc, raid_device)) {
			dfailprintk(ioc,
				    ioc_warn(ioc, "failure at %s:%d/%s()!\n",
					     __FILE__, __LINE__, __func__));
			return 1;
		}

		/*
		 * WARPDRIVE: Initialize the required data for Direct IO
		 */
		mpt3sas_init_warpdrive_properties(ioc, raid_device);

		/* RAID Queue Depth Support
		 * IS volume = underlying qdepth of drive type, either
		 *    MPT3SAS_SAS_QUEUE_DEPTH or MPT3SAS_SATA_QUEUE_DEPTH
		 * IM/IME/R10 = 128 (MPT3SAS_RAID_QUEUE_DEPTH)
		 */
		if (raid_device->device_info &
		    MPI2_SAS_DEVICE_INFO_SSP_TARGET) {
			qdepth = MPT3SAS_SAS_QUEUE_DEPTH;
			ds = "SSP";
		} else {
			qdepth = MPT3SAS_SATA_QUEUE_DEPTH;
			if (raid_device->device_info &
			    MPI2_SAS_DEVICE_INFO_SATA_DEVICE)
				ds = "SATA";
			else
				ds = "STP";
		}

		switch (raid_device->volume_type) {
		case MPI2_RAID_VOL_TYPE_RAID0:
			r_level = "RAID0";
			break;
		case MPI2_RAID_VOL_TYPE_RAID1E:
			qdepth = MPT3SAS_RAID_QUEUE_DEPTH;
			if (ioc->manu_pg10.OEMIdentifier &&
			    (le32_to_cpu(ioc->manu_pg10.GenericFlags0) &
			    MFG10_GF0_R10_DISPLAY) &&
			    !(raid_device->num_pds % 2))
				r_level = "RAID10";
			else
				r_level = "RAID1E";
			break;
		case MPI2_RAID_VOL_TYPE_RAID1:
			qdepth = MPT3SAS_RAID_QUEUE_DEPTH;
			r_level = "RAID1";
			break;
		case MPI2_RAID_VOL_TYPE_RAID10:
			qdepth = MPT3SAS_RAID_QUEUE_DEPTH;
			r_level = "RAID10";
			break;
		case MPI2_RAID_VOL_TYPE_UNKNOWN:
		default:
			qdepth = MPT3SAS_RAID_QUEUE_DEPTH;
			r_level = "RAIDX";
			break;
		}

		if (!ioc->hide_ir_msg)
			sdev_printk(KERN_INFO, sdev,
			   "%s: handle(0x%04x), wwid(0x%016llx),"
			    " pd_count(%d), type(%s)\n",
			    r_level, raid_device->handle,
			    (unsigned long long)raid_device->wwid,
			    raid_device->num_pds, ds);

		if (shost->max_sectors > MPT3SAS_RAID_MAX_SECTORS) {
			blk_queue_max_hw_sectors(sdev->request_queue,
						MPT3SAS_RAID_MAX_SECTORS);
			sdev_printk(KERN_INFO, sdev,
					"Set queue's max_sector to: %u\n",
						MPT3SAS_RAID_MAX_SECTORS);
		}

		mpt3sas_scsih_change_queue_depth(sdev, qdepth);

		/* raid transport support */
		if (!ioc->is_warpdrive)
			_scsih_set_level(ioc, sdev, raid_device->volume_type);
		return 0;
	}

	/* non-raid handling */
	if (sas_target_priv_data->flags & MPT_TARGET_FLAGS_RAID_COMPONENT) {
		if (mpt3sas_config_get_volume_handle(ioc, handle,
		    &volume_handle)) {
			dfailprintk(ioc,
				    ioc_warn(ioc, "failure at %s:%d/%s()!\n",
					     __FILE__, __LINE__, __func__));
			return 1;
		}
		if (volume_handle && mpt3sas_config_get_volume_wwid(ioc,
		    volume_handle, &volume_wwid)) {
			dfailprintk(ioc,
				    ioc_warn(ioc, "failure at %s:%d/%s()!\n",
					     __FILE__, __LINE__, __func__));
			return 1;
		}
	}

	/* PCIe handling */
	if (sas_target_priv_data->flags & MPT_TARGET_FLAGS_PCIE_DEVICE) {
		spin_lock_irqsave(&ioc->pcie_device_lock, flags);
		pcie_device = __mpt3sas_get_pdev_by_wwid(ioc,
				sas_device_priv_data->sas_target->sas_address);
		if (!pcie_device) {
			spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
			dfailprintk(ioc,
				    ioc_warn(ioc, "failure at %s:%d/%s()!\n",
					     __FILE__, __LINE__, __func__));
			return 1;
		}

		qdepth = ioc->max_nvme_qd;
		ds = "NVMe";
		sdev_printk(KERN_INFO, sdev,
			"%s: handle(0x%04x), wwid(0x%016llx), port(%d)\n",
			ds, handle, (unsigned long long)pcie_device->wwid,
			pcie_device->port_num);
		if (pcie_device->enclosure_handle != 0)
			sdev_printk(KERN_INFO, sdev,
			"%s: enclosure logical id(0x%016llx), slot(%d)\n",
			ds,
			(unsigned long long)pcie_device->enclosure_logical_id,
			pcie_device->slot);
		if (pcie_device->connector_name[0] != '\0')
			sdev_printk(KERN_INFO, sdev,
				"%s: enclosure level(0x%04x),"
				"connector name( %s)\n", ds,
				pcie_device->enclosure_level,
				pcie_device->connector_name);

		if (pcie_device->nvme_mdts)
			blk_queue_max_hw_sectors(sdev->request_queue,
					pcie_device->nvme_mdts/512);

		pcie_device_put(pcie_device);
		spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
		mpt3sas_scsih_change_queue_depth(sdev, qdepth);
		/* Enable QUEUE_FLAG_NOMERGES flag, so that IOs won't be
		 ** merged and can eliminate holes created during merging
		 ** operation.
		 **/
		blk_queue_flag_set(QUEUE_FLAG_NOMERGES,
				sdev->request_queue);
		blk_queue_virt_boundary(sdev->request_queue,
				ioc->page_size - 1);
		return 0;
	}

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device = __mpt3sas_get_sdev_by_addr(ioc,
	   sas_device_priv_data->sas_target->sas_address,
	   sas_device_priv_data->sas_target->port);
	if (!sas_device) {
		spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
		dfailprintk(ioc,
			    ioc_warn(ioc, "failure at %s:%d/%s()!\n",
				     __FILE__, __LINE__, __func__));
		return 1;
	}

	sas_device->volume_handle = volume_handle;
	sas_device->volume_wwid = volume_wwid;
	if (sas_device->device_info & MPI2_SAS_DEVICE_INFO_SSP_TARGET) {
		qdepth = (sas_device->port_type > 1) ?
			ioc->max_wideport_qd : ioc->max_narrowport_qd;
		ssp_target = 1;
		if (sas_device->device_info &
				MPI2_SAS_DEVICE_INFO_SEP) {
			sdev_printk(KERN_WARNING, sdev,
			"set ignore_delay_remove for handle(0x%04x)\n",
			sas_device_priv_data->sas_target->handle);
			sas_device_priv_data->ignore_delay_remove = 1;
			ds = "SES";
		} else
			ds = "SSP";
	} else {
		qdepth = ioc->max_sata_qd;
		if (sas_device->device_info & MPI2_SAS_DEVICE_INFO_STP_TARGET)
			ds = "STP";
		else if (sas_device->device_info &
		    MPI2_SAS_DEVICE_INFO_SATA_DEVICE)
			ds = "SATA";
	}

	sdev_printk(KERN_INFO, sdev, "%s: handle(0x%04x), " \
	    "sas_addr(0x%016llx), phy(%d), device_name(0x%016llx)\n",
	    ds, handle, (unsigned long long)sas_device->sas_address,
	    sas_device->phy, (unsigned long long)sas_device->device_name);

	_scsih_display_enclosure_chassis_info(NULL, sas_device, sdev, NULL);

	sas_device_put(sas_device);
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);

	if (!ssp_target)
		_scsih_display_sata_capabilities(ioc, handle, sdev);


	mpt3sas_scsih_change_queue_depth(sdev, qdepth);

	if (ssp_target) {
		sas_read_port_mode_page(sdev);
		_scsih_enable_tlr(ioc, sdev);
	}

	return 0;
}

/**
 * scsih_bios_param - fetch head, sector, cylinder info for a disk
 * @sdev: scsi device struct
 * @bdev: pointer to block device context
 * @capacity: device size (in 512 byte sectors)
 * @params: three element array to place output:
 *              params[0] number of heads (max 255)
 *              params[1] number of sectors (max 63)
 *              params[2] number of cylinders
 */
static int
scsih_bios_param(struct scsi_device *sdev, struct block_device *bdev,
	sector_t capacity, int params[])
{
	int		heads;
	int		sectors;
	sector_t	cylinders;
	ulong		dummy;

	heads = 64;
	sectors = 32;

	dummy = heads * sectors;
	cylinders = capacity;
	sector_div(cylinders, dummy);

	/*
	 * Handle extended translation size for logical drives
	 * > 1Gb
	 */
	if ((ulong)capacity >= 0x200000) {
		heads = 255;
		sectors = 63;
		dummy = heads * sectors;
		cylinders = capacity;
		sector_div(cylinders, dummy);
	}

	/* return result */
	params[0] = heads;
	params[1] = sectors;
	params[2] = cylinders;

	return 0;
}

/**
 * _scsih_response_code - translation of device response code
 * @ioc: per adapter object
 * @response_code: response code returned by the device
 */
static void
_scsih_response_code(struct MPT3SAS_ADAPTER *ioc, u8 response_code)
{
	char *desc;

	switch (response_code) {
	case MPI2_SCSITASKMGMT_RSP_TM_COMPLETE:
		desc = "task management request completed";
		break;
	case MPI2_SCSITASKMGMT_RSP_INVALID_FRAME:
		desc = "invalid frame";
		break;
	case MPI2_SCSITASKMGMT_RSP_TM_NOT_SUPPORTED:
		desc = "task management request not supported";
		break;
	case MPI2_SCSITASKMGMT_RSP_TM_FAILED:
		desc = "task management request failed";
		break;
	case MPI2_SCSITASKMGMT_RSP_TM_SUCCEEDED:
		desc = "task management request succeeded";
		break;
	case MPI2_SCSITASKMGMT_RSP_TM_INVALID_LUN:
		desc = "invalid lun";
		break;
	case 0xA:
		desc = "overlapped tag attempted";
		break;
	case MPI2_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC:
		desc = "task queued, however not sent to target";
		break;
	default:
		desc = "unknown";
		break;
	}
	ioc_warn(ioc, "response_code(0x%01x): %s\n", response_code, desc);
}

/**
 * _scsih_tm_done - tm completion routine
 * @ioc: per adapter object
 * @smid: system request message index
 * @msix_index: MSIX table index supplied by the OS
 * @reply: reply message frame(lower 32bit addr)
 * Context: none.
 *
 * The callback handler when using scsih_issue_tm.
 *
 * Return: 1 meaning mf should be freed from _base_interrupt
 *         0 means the mf is freed from this function.
 */
static u8
_scsih_tm_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
{
	MPI2DefaultReply_t *mpi_reply;

	if (ioc->tm_cmds.status == MPT3_CMD_NOT_USED)
		return 1;
	if (ioc->tm_cmds.smid != smid)
		return 1;
	ioc->tm_cmds.status |= MPT3_CMD_COMPLETE;
	mpi_reply =  mpt3sas_base_get_reply_virt_addr(ioc, reply);
	if (mpi_reply) {
		memcpy(ioc->tm_cmds.reply, mpi_reply, mpi_reply->MsgLength*4);
		ioc->tm_cmds.status |= MPT3_CMD_REPLY_VALID;
	}
	ioc->tm_cmds.status &= ~MPT3_CMD_PENDING;
	complete(&ioc->tm_cmds.done);
	return 1;
}

/**
 * mpt3sas_scsih_set_tm_flag - set per target tm_busy
 * @ioc: per adapter object
 * @handle: device handle
 *
 * During taskmangement request, we need to freeze the device queue.
 */
void
mpt3sas_scsih_set_tm_flag(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct scsi_device *sdev;
	u8 skip = 0;

	shost_for_each_device(sdev, ioc->shost) {
		if (skip)
			continue;
		sas_device_priv_data = sdev->hostdata;
		if (!sas_device_priv_data)
			continue;
		if (sas_device_priv_data->sas_target->handle == handle) {
			sas_device_priv_data->sas_target->tm_busy = 1;
			skip = 1;
			ioc->ignore_loginfos = 1;
		}
	}
}

/**
 * mpt3sas_scsih_clear_tm_flag - clear per target tm_busy
 * @ioc: per adapter object
 * @handle: device handle
 *
 * During taskmangement request, we need to freeze the device queue.
 */
void
mpt3sas_scsih_clear_tm_flag(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct scsi_device *sdev;
	u8 skip = 0;

	shost_for_each_device(sdev, ioc->shost) {
		if (skip)
			continue;
		sas_device_priv_data = sdev->hostdata;
		if (!sas_device_priv_data)
			continue;
		if (sas_device_priv_data->sas_target->handle == handle) {
			sas_device_priv_data->sas_target->tm_busy = 0;
			skip = 1;
			ioc->ignore_loginfos = 0;
		}
	}
}

/**
 * scsih_tm_cmd_map_status - map the target reset & LUN reset TM status
 * @ioc: per adapter object
 * @channel: the channel assigned by the OS
 * @id: the id assigned by the OS
 * @lun: lun number
 * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in mpi2_init.h)
 * @smid_task: smid assigned to the task
 *
 * Look whether TM has aborted the timed out SCSI command, if
 * TM has aborted the IO then return SUCCESS else return FAILED.
 */
static int
scsih_tm_cmd_map_status(struct MPT3SAS_ADAPTER *ioc, uint channel,
	uint id, uint lun, u8 type, u16 smid_task)
{

	if (smid_task <= ioc->shost->can_queue) {
		switch (type) {
		case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
			if (!(_scsih_scsi_lookup_find_by_target(ioc,
			    id, channel)))
				return SUCCESS;
			break;
		case MPI2_SCSITASKMGMT_TASKTYPE_ABRT_TASK_SET:
		case MPI2_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET:
			if (!(_scsih_scsi_lookup_find_by_lun(ioc, id,
			    lun, channel)))
				return SUCCESS;
			break;
		default:
			return SUCCESS;
		}
	} else if (smid_task == ioc->scsih_cmds.smid) {
		if ((ioc->scsih_cmds.status & MPT3_CMD_COMPLETE) ||
		    (ioc->scsih_cmds.status & MPT3_CMD_NOT_USED))
			return SUCCESS;
	} else if (smid_task == ioc->ctl_cmds.smid) {
		if ((ioc->ctl_cmds.status & MPT3_CMD_COMPLETE) ||
		    (ioc->ctl_cmds.status & MPT3_CMD_NOT_USED))
			return SUCCESS;
	}

	return FAILED;
}

/**
 * scsih_tm_post_processing - post processing of target & LUN reset
 * @ioc: per adapter object
 * @handle: device handle
 * @channel: the channel assigned by the OS
 * @id: the id assigned by the OS
 * @lun: lun number
 * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in mpi2_init.h)
 * @smid_task: smid assigned to the task
 *
 * Post processing of target & LUN reset. Due to interrupt latency
 * issue it possible that interrupt for aborted IO might not be
 * received yet. So before returning failure status, poll the
 * reply descriptor pools for the reply of timed out SCSI command.
 * Return FAILED status if reply for timed out is not received
 * otherwise return SUCCESS.
 */
static int
scsih_tm_post_processing(struct MPT3SAS_ADAPTER *ioc, u16 handle,
	uint channel, uint id, uint lun, u8 type, u16 smid_task)
{
	int rc;

	rc = scsih_tm_cmd_map_status(ioc, channel, id, lun, type, smid_task);
	if (rc == SUCCESS)
		return rc;

	ioc_info(ioc,
	    "Poll ReplyDescriptor queues for completion of"
	    " smid(%d), task_type(0x%02x), handle(0x%04x)\n",
	    smid_task, type, handle);

	/*
	 * Due to interrupt latency issues, driver may receive interrupt for
	 * TM first and then for aborted SCSI IO command. So, poll all the
	 * ReplyDescriptor pools before returning the FAILED status to SML.
	 */
	mpt3sas_base_mask_interrupts(ioc);
	mpt3sas_base_sync_reply_irqs(ioc, 1);
	mpt3sas_base_unmask_interrupts(ioc);

	return scsih_tm_cmd_map_status(ioc, channel, id, lun, type, smid_task);
}

/**
 * mpt3sas_scsih_issue_tm - main routine for sending tm requests
 * @ioc: per adapter struct
 * @handle: device handle
 * @channel: the channel assigned by the OS
 * @id: the id assigned by the OS
 * @lun: lun number
 * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in mpi2_init.h)
 * @smid_task: smid assigned to the task
 * @msix_task: MSIX table index supplied by the OS
 * @timeout: timeout in seconds
 * @tr_method: Target Reset Method
 * Context: user
 *
 * A generic API for sending task management requests to firmware.
 *
 * The callback index is set inside `ioc->tm_cb_idx`.
 * The caller is responsible to check for outstanding commands.
 *
 * Return: SUCCESS or FAILED.
 */
int
mpt3sas_scsih_issue_tm(struct MPT3SAS_ADAPTER *ioc, u16 handle, uint channel,
	uint id, u64 lun, u8 type, u16 smid_task, u16 msix_task,
	u8 timeout, u8 tr_method)
{
	Mpi2SCSITaskManagementRequest_t *mpi_request;
	Mpi2SCSITaskManagementReply_t *mpi_reply;
	Mpi25SCSIIORequest_t *request;
	u16 smid = 0;
	u32 ioc_state;
	int rc;
	u8 issue_reset = 0;

	lockdep_assert_held(&ioc->tm_cmds.mutex);

	if (ioc->tm_cmds.status != MPT3_CMD_NOT_USED) {
		ioc_info(ioc, "%s: tm_cmd busy!!!\n", __func__);
		return FAILED;
	}

	if (ioc->shost_recovery || ioc->remove_host ||
	    ioc->pci_error_recovery) {
		ioc_info(ioc, "%s: host reset in progress!\n", __func__);
		return FAILED;
	}

	ioc_state = mpt3sas_base_get_iocstate(ioc, 0);
	if (ioc_state & MPI2_DOORBELL_USED) {
		dhsprintk(ioc, ioc_info(ioc, "unexpected doorbell active!\n"));
		rc = mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
		return (!rc) ? SUCCESS : FAILED;
	}

	if ((ioc_state & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT) {
		mpt3sas_print_fault_code(ioc, ioc_state &
		    MPI2_DOORBELL_DATA_MASK);
		rc = mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
		return (!rc) ? SUCCESS : FAILED;
	} else if ((ioc_state & MPI2_IOC_STATE_MASK) ==
	    MPI2_IOC_STATE_COREDUMP) {
		mpt3sas_print_coredump_info(ioc, ioc_state &
		    MPI2_DOORBELL_DATA_MASK);
		rc = mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
		return (!rc) ? SUCCESS : FAILED;
	}

	smid = mpt3sas_base_get_smid_hpr(ioc, ioc->tm_cb_idx);
	if (!smid) {
		ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
		return FAILED;
	}

	dtmprintk(ioc,
		  ioc_info(ioc, "sending tm: handle(0x%04x), task_type(0x%02x), smid(%d), timeout(%d), tr_method(0x%x)\n",
			   handle, type, smid_task, timeout, tr_method));
	ioc->tm_cmds.status = MPT3_CMD_PENDING;
	mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
	ioc->tm_cmds.smid = smid;
	memset(mpi_request, 0, sizeof(Mpi2SCSITaskManagementRequest_t));
	memset(ioc->tm_cmds.reply, 0, sizeof(Mpi2SCSITaskManagementReply_t));
	mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
	mpi_request->DevHandle = cpu_to_le16(handle);
	mpi_request->TaskType = type;
	if (type == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK ||
	    type == MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK)
		mpi_request->MsgFlags = tr_method;
	mpi_request->TaskMID = cpu_to_le16(smid_task);
	int_to_scsilun(lun, (struct scsi_lun *)mpi_request->LUN);
	mpt3sas_scsih_set_tm_flag(ioc, handle);
	init_completion(&ioc->tm_cmds.done);
	ioc->put_smid_hi_priority(ioc, smid, msix_task);
	wait_for_completion_timeout(&ioc->tm_cmds.done, timeout*HZ);
	if (!(ioc->tm_cmds.status & MPT3_CMD_COMPLETE)) {
		mpt3sas_check_cmd_timeout(ioc,
		    ioc->tm_cmds.status, mpi_request,
		    sizeof(Mpi2SCSITaskManagementRequest_t)/4, issue_reset);
		if (issue_reset) {
			rc = mpt3sas_base_hard_reset_handler(ioc,
					FORCE_BIG_HAMMER);
			rc = (!rc) ? SUCCESS : FAILED;
			goto out;
		}
	}

	/* sync IRQs in case those were busy during flush. */
	mpt3sas_base_sync_reply_irqs(ioc, 0);

	if (ioc->tm_cmds.status & MPT3_CMD_REPLY_VALID) {
		mpt3sas_trigger_master(ioc, MASTER_TRIGGER_TASK_MANAGMENT);
		mpi_reply = ioc->tm_cmds.reply;
		dtmprintk(ioc,
			  ioc_info(ioc, "complete tm: ioc_status(0x%04x), loginfo(0x%08x), term_count(0x%08x)\n",
				   le16_to_cpu(mpi_reply->IOCStatus),
				   le32_to_cpu(mpi_reply->IOCLogInfo),
				   le32_to_cpu(mpi_reply->TerminationCount)));
		if (ioc->logging_level & MPT_DEBUG_TM) {
			_scsih_response_code(ioc, mpi_reply->ResponseCode);
			if (mpi_reply->IOCStatus)
				_debug_dump_mf(mpi_request,
				    sizeof(Mpi2SCSITaskManagementRequest_t)/4);
		}
	}

	switch (type) {
	case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
		rc = SUCCESS;
		/*
		 * If DevHandle filed in smid_task's entry of request pool
		 * doesn't match with device handle on which this task abort
		 * TM is received then it means that TM has successfully
		 * aborted the timed out command. Since smid_task's entry in
		 * request pool will be memset to zero once the timed out
		 * command is returned to the SML. If the command is not
		 * aborted then smid_task’s entry won’t be cleared and it
		 * will have same DevHandle value on which this task abort TM
		 * is received and driver will return the TM status as FAILED.
		 */
		request = mpt3sas_base_get_msg_frame(ioc, smid_task);
		if (le16_to_cpu(request->DevHandle) != handle)
			break;

		ioc_info(ioc, "Task abort tm failed: handle(0x%04x),"
		    "timeout(%d) tr_method(0x%x) smid(%d) msix_index(%d)\n",
		    handle, timeout, tr_method, smid_task, msix_task);
		rc = FAILED;
		break;

	case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
	case MPI2_SCSITASKMGMT_TASKTYPE_ABRT_TASK_SET:
	case MPI2_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET:
		rc = scsih_tm_post_processing(ioc, handle, channel, id, lun,
		    type, smid_task);
		break;
	case MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK:
		rc = SUCCESS;
		break;
	default:
		rc = FAILED;
		break;
	}

out:
	mpt3sas_scsih_clear_tm_flag(ioc, handle);
	ioc->tm_cmds.status = MPT3_CMD_NOT_USED;
	return rc;
}

int mpt3sas_scsih_issue_locked_tm(struct MPT3SAS_ADAPTER *ioc, u16 handle,
		uint channel, uint id, u64 lun, u8 type, u16 smid_task,
		u16 msix_task, u8 timeout, u8 tr_method)
{
	int ret;

	mutex_lock(&ioc->tm_cmds.mutex);
	ret = mpt3sas_scsih_issue_tm(ioc, handle, channel, id, lun, type,
			smid_task, msix_task, timeout, tr_method);
	mutex_unlock(&ioc->tm_cmds.mutex);

	return ret;
}

/**
 * _scsih_tm_display_info - displays info about the device
 * @ioc: per adapter struct
 * @scmd: pointer to scsi command object
 *
 * Called by task management callback handlers.
 */
static void
_scsih_tm_display_info(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd)
{
	struct scsi_target *starget = scmd->device->sdev_target;
	struct MPT3SAS_TARGET *priv_target = starget->hostdata;
	struct _sas_device *sas_device = NULL;
	struct _pcie_device *pcie_device = NULL;
	unsigned long flags;
	char *device_str = NULL;

	if (!priv_target)
		return;
	if (ioc->hide_ir_msg)
		device_str = "WarpDrive";
	else
		device_str = "volume";

	scsi_print_command(scmd);
	if (priv_target->flags & MPT_TARGET_FLAGS_VOLUME) {
		starget_printk(KERN_INFO, starget,
			"%s handle(0x%04x), %s wwid(0x%016llx)\n",
			device_str, priv_target->handle,
		    device_str, (unsigned long long)priv_target->sas_address);

	} else if (priv_target->flags & MPT_TARGET_FLAGS_PCIE_DEVICE) {
		spin_lock_irqsave(&ioc->pcie_device_lock, flags);
		pcie_device = __mpt3sas_get_pdev_from_target(ioc, priv_target);
		if (pcie_device) {
			starget_printk(KERN_INFO, starget,
				"handle(0x%04x), wwid(0x%016llx), port(%d)\n",
				pcie_device->handle,
				(unsigned long long)pcie_device->wwid,
				pcie_device->port_num);
			if (pcie_device->enclosure_handle != 0)
				starget_printk(KERN_INFO, starget,
					"enclosure logical id(0x%016llx), slot(%d)\n",
					(unsigned long long)
					pcie_device->enclosure_logical_id,
					pcie_device->slot);
			if (pcie_device->connector_name[0] != '\0')
				starget_printk(KERN_INFO, starget,
					"enclosure level(0x%04x), connector name( %s)\n",
					pcie_device->enclosure_level,
					pcie_device->connector_name);
			pcie_device_put(pcie_device);
		}
		spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);

	} else {
		spin_lock_irqsave(&ioc->sas_device_lock, flags);
		sas_device = __mpt3sas_get_sdev_from_target(ioc, priv_target);
		if (sas_device) {
			if (priv_target->flags &
			    MPT_TARGET_FLAGS_RAID_COMPONENT) {
				starget_printk(KERN_INFO, starget,
				    "volume handle(0x%04x), "
				    "volume wwid(0x%016llx)\n",
				    sas_device->volume_handle,
				   (unsigned long long)sas_device->volume_wwid);
			}
			starget_printk(KERN_INFO, starget,
			    "handle(0x%04x), sas_address(0x%016llx), phy(%d)\n",
			    sas_device->handle,
			    (unsigned long long)sas_device->sas_address,
			    sas_device->phy);

			_scsih_display_enclosure_chassis_info(NULL, sas_device,
			    NULL, starget);

			sas_device_put(sas_device);
		}
		spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
	}
}

/**
 * scsih_abort - eh threads main abort routine
 * @scmd: pointer to scsi command object
 *
 * Return: SUCCESS if command aborted else FAILED
 */
static int
scsih_abort(struct scsi_cmnd *scmd)
{
	struct MPT3SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct scsiio_tracker *st = scsi_cmd_priv(scmd);
	u16 handle;
	int r;

	u8 timeout = 30;
	struct _pcie_device *pcie_device = NULL;
	sdev_printk(KERN_INFO, scmd->device, "attempting task abort!"
	    "scmd(0x%p), outstanding for %u ms & timeout %u ms\n",
	    scmd, jiffies_to_msecs(jiffies - scmd->jiffies_at_alloc),
	    (scsi_cmd_to_rq(scmd)->timeout / HZ) * 1000);
	_scsih_tm_display_info(ioc, scmd);

	sas_device_priv_data = scmd->device->hostdata;
	if (!sas_device_priv_data || !sas_device_priv_data->sas_target ||
	    ioc->remove_host) {
		sdev_printk(KERN_INFO, scmd->device,
		    "device been deleted! scmd(0x%p)\n", scmd);
		scmd->result = DID_NO_CONNECT << 16;
		scsi_done(scmd);
		r = SUCCESS;
		goto out;
	}

	/* check for completed command */
	if (st == NULL || st->cb_idx == 0xFF) {
		sdev_printk(KERN_INFO, scmd->device, "No reference found at "
		    "driver, assuming scmd(0x%p) might have completed\n", scmd);
		scmd->result = DID_RESET << 16;
		r = SUCCESS;
		goto out;
	}

	/* for hidden raid components and volumes this is not supported */
	if (sas_device_priv_data->sas_target->flags &
	    MPT_TARGET_FLAGS_RAID_COMPONENT ||
	    sas_device_priv_data->sas_target->flags & MPT_TARGET_FLAGS_VOLUME) {
		scmd->result = DID_RESET << 16;
		r = FAILED;
		goto out;
	}

	mpt3sas_halt_firmware(ioc);

	handle = sas_device_priv_data->sas_target->handle;
	pcie_device = mpt3sas_get_pdev_by_handle(ioc, handle);
	if (pcie_device && (!ioc->tm_custom_handling) &&
	    (!(mpt3sas_scsih_is_pcie_scsi_device(pcie_device->device_info))))
		timeout = ioc->nvme_abort_timeout;
	r = mpt3sas_scsih_issue_locked_tm(ioc, handle, scmd->device->channel,
		scmd->device->id, scmd->device->lun,
		MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK,
		st->smid, st->msix_io, timeout, 0);
	/* Command must be cleared after abort */
	if (r == SUCCESS && st->cb_idx != 0xFF)
		r = FAILED;
 out:
	sdev_printk(KERN_INFO, scmd->device, "task abort: %s scmd(0x%p)\n",
	    ((r == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);
	if (pcie_device)
		pcie_device_put(pcie_device);
	return r;
}

/**
 * scsih_dev_reset - eh threads main device reset routine
 * @scmd: pointer to scsi command object
 *
 * Return: SUCCESS if command aborted else FAILED
 */
static int
scsih_dev_reset(struct scsi_cmnd *scmd)
{
	struct MPT3SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct _sas_device *sas_device = NULL;
	struct _pcie_device *pcie_device = NULL;
	u16	handle;
	u8	tr_method = 0;
	u8	tr_timeout = 30;
	int r;

	struct scsi_target *starget = scmd->device->sdev_target;
	struct MPT3SAS_TARGET *target_priv_data = starget->hostdata;

	sdev_printk(KERN_INFO, scmd->device,
	    "attempting device reset! scmd(0x%p)\n", scmd);
	_scsih_tm_display_info(ioc, scmd);

	sas_device_priv_data = scmd->device->hostdata;
	if (!sas_device_priv_data || !sas_device_priv_data->sas_target ||
	    ioc->remove_host) {
		sdev_printk(KERN_INFO, scmd->device,
		    "device been deleted! scmd(0x%p)\n", scmd);
		scmd->result = DID_NO_CONNECT << 16;
		scsi_done(scmd);
		r = SUCCESS;
		goto out;
	}

	/* for hidden raid components obtain the volume_handle */
	handle = 0;
	if (sas_device_priv_data->sas_target->flags &
	    MPT_TARGET_FLAGS_RAID_COMPONENT) {
		sas_device = mpt3sas_get_sdev_from_target(ioc,
				target_priv_data);
		if (sas_device)
			handle = sas_device->volume_handle;
	} else
		handle = sas_device_priv_data->sas_target->handle;

	if (!handle) {
		scmd->result = DID_RESET << 16;
		r = FAILED;
		goto out;
	}

	pcie_device = mpt3sas_get_pdev_by_handle(ioc, handle);

	if (pcie_device && (!ioc->tm_custom_handling) &&
	    (!(mpt3sas_scsih_is_pcie_scsi_device(pcie_device->device_info)))) {
		tr_timeout = pcie_device->reset_timeout;
		tr_method = MPI26_SCSITASKMGMT_MSGFLAGS_PROTOCOL_LVL_RST_PCIE;
	} else
		tr_method = MPI2_SCSITASKMGMT_MSGFLAGS_LINK_RESET;

	r = mpt3sas_scsih_issue_locked_tm(ioc, handle, scmd->device->channel,
		scmd->device->id, scmd->device->lun,
		MPI2_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET, 0, 0,
		tr_timeout, tr_method);
	/* Check for busy commands after reset */
	if (r == SUCCESS && scsi_device_busy(scmd->device))
		r = FAILED;
 out:
	sdev_printk(KERN_INFO, scmd->device, "device reset: %s scmd(0x%p)\n",
	    ((r == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);

	if (sas_device)
		sas_device_put(sas_device);
	if (pcie_device)
		pcie_device_put(pcie_device);

	return r;
}

/**
 * scsih_target_reset - eh threads main target reset routine
 * @scmd: pointer to scsi command object
 *
 * Return: SUCCESS if command aborted else FAILED
 */
static int
scsih_target_reset(struct scsi_cmnd *scmd)
{
	struct MPT3SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct _sas_device *sas_device = NULL;
	struct _pcie_device *pcie_device = NULL;
	u16	handle;
	u8	tr_method = 0;
	u8	tr_timeout = 30;
	int r;
	struct scsi_target *starget = scmd->device->sdev_target;
	struct MPT3SAS_TARGET *target_priv_data = starget->hostdata;

	starget_printk(KERN_INFO, starget,
	    "attempting target reset! scmd(0x%p)\n", scmd);
	_scsih_tm_display_info(ioc, scmd);

	sas_device_priv_data = scmd->device->hostdata;
	if (!sas_device_priv_data || !sas_device_priv_data->sas_target ||
	    ioc->remove_host) {
		starget_printk(KERN_INFO, starget,
		    "target been deleted! scmd(0x%p)\n", scmd);
		scmd->result = DID_NO_CONNECT << 16;
		scsi_done(scmd);
		r = SUCCESS;
		goto out;
	}

	/* for hidden raid components obtain the volume_handle */
	handle = 0;
	if (sas_device_priv_data->sas_target->flags &
	    MPT_TARGET_FLAGS_RAID_COMPONENT) {
		sas_device = mpt3sas_get_sdev_from_target(ioc,
				target_priv_data);
		if (sas_device)
			handle = sas_device->volume_handle;
	} else
		handle = sas_device_priv_data->sas_target->handle;

	if (!handle) {
		scmd->result = DID_RESET << 16;
		r = FAILED;
		goto out;
	}

	pcie_device = mpt3sas_get_pdev_by_handle(ioc, handle);

	if (pcie_device && (!ioc->tm_custom_handling) &&
	    (!(mpt3sas_scsih_is_pcie_scsi_device(pcie_device->device_info)))) {
		tr_timeout = pcie_device->reset_timeout;
		tr_method = MPI26_SCSITASKMGMT_MSGFLAGS_PROTOCOL_LVL_RST_PCIE;
	} else
		tr_method = MPI2_SCSITASKMGMT_MSGFLAGS_LINK_RESET;
	r = mpt3sas_scsih_issue_locked_tm(ioc, handle, scmd->device->channel,
		scmd->device->id, 0,
		MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0, 0,
	    tr_timeout, tr_method);
	/* Check for busy commands after reset */
	if (r == SUCCESS && atomic_read(&starget->target_busy))
		r = FAILED;
 out:
	starget_printk(KERN_INFO, starget, "target reset: %s scmd(0x%p)\n",
	    ((r == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);

	if (sas_device)
		sas_device_put(sas_device);
	if (pcie_device)
		pcie_device_put(pcie_device);
	return r;
}


/**
 * scsih_host_reset - eh threads main host reset routine
 * @scmd: pointer to scsi command object
 *
 * Return: SUCCESS if command aborted else FAILED
 */
static int
scsih_host_reset(struct scsi_cmnd *scmd)
{
	struct MPT3SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
	int r, retval;

	ioc_info(ioc, "attempting host reset! scmd(0x%p)\n", scmd);
	scsi_print_command(scmd);

	if (ioc->is_driver_loading || ioc->remove_host) {
		ioc_info(ioc, "Blocking the host reset\n");
		r = FAILED;
		goto out;
	}

	retval = mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
	r = (retval < 0) ? FAILED : SUCCESS;
out:
	ioc_info(ioc, "host reset: %s scmd(0x%p)\n",
		 r == SUCCESS ? "SUCCESS" : "FAILED", scmd);

	return r;
}

/**
 * _scsih_fw_event_add - insert and queue up fw_event
 * @ioc: per adapter object
 * @fw_event: object describing the event
 * Context: This function will acquire ioc->fw_event_lock.
 *
 * This adds the firmware event object into link list, then queues it up to
 * be processed from user context.
 */
static void
_scsih_fw_event_add(struct MPT3SAS_ADAPTER *ioc, struct fw_event_work *fw_event)
{
	unsigned long flags;

	if (ioc->firmware_event_thread == NULL)
		return;

	spin_lock_irqsave(&ioc->fw_event_lock, flags);
	fw_event_work_get(fw_event);
	INIT_LIST_HEAD(&fw_event->list);
	list_add_tail(&fw_event->list, &ioc->fw_event_list);
	INIT_WORK(&fw_event->work, _firmware_event_work);
	fw_event_work_get(fw_event);
	queue_work(ioc->firmware_event_thread, &fw_event->work);
	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
}

/**
 * _scsih_fw_event_del_from_list - delete fw_event from the list
 * @ioc: per adapter object
 * @fw_event: object describing the event
 * Context: This function will acquire ioc->fw_event_lock.
 *
 * If the fw_event is on the fw_event_list, remove it and do a put.
 */
static void
_scsih_fw_event_del_from_list(struct MPT3SAS_ADAPTER *ioc, struct fw_event_work
	*fw_event)
{
	unsigned long flags;

	spin_lock_irqsave(&ioc->fw_event_lock, flags);
	if (!list_empty(&fw_event->list)) {
		list_del_init(&fw_event->list);
		fw_event_work_put(fw_event);
	}
	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
}


 /**
 * mpt3sas_send_trigger_data_event - send event for processing trigger data
 * @ioc: per adapter object
 * @event_data: trigger event data
 */
void
mpt3sas_send_trigger_data_event(struct MPT3SAS_ADAPTER *ioc,
	struct SL_WH_TRIGGERS_EVENT_DATA_T *event_data)
{
	struct fw_event_work *fw_event;
	u16 sz;

	if (ioc->is_driver_loading)
		return;
	sz = sizeof(*event_data);
	fw_event = alloc_fw_event_work(sz);
	if (!fw_event)
		return;
	fw_event->event = MPT3SAS_PROCESS_TRIGGER_DIAG;
	fw_event->ioc = ioc;
	memcpy(fw_event->event_data, event_data, sizeof(*event_data));
	_scsih_fw_event_add(ioc, fw_event);
	fw_event_work_put(fw_event);
}

/**
 * _scsih_error_recovery_delete_devices - remove devices not responding
 * @ioc: per adapter object
 */
static void
_scsih_error_recovery_delete_devices(struct MPT3SAS_ADAPTER *ioc)
{
	struct fw_event_work *fw_event;

	fw_event = alloc_fw_event_work(0);
	if (!fw_event)
		return;
	fw_event->event = MPT3SAS_REMOVE_UNRESPONDING_DEVICES;
	fw_event->ioc = ioc;
	_scsih_fw_event_add(ioc, fw_event);
	fw_event_work_put(fw_event);
}

/**
 * mpt3sas_port_enable_complete - port enable completed (fake event)
 * @ioc: per adapter object
 */
void
mpt3sas_port_enable_complete(struct MPT3SAS_ADAPTER *ioc)
{
	struct fw_event_work *fw_event;

	fw_event = alloc_fw_event_work(0);
	if (!fw_event)
		return;
	fw_event->event = MPT3SAS_PORT_ENABLE_COMPLETE;
	fw_event->ioc = ioc;
	_scsih_fw_event_add(ioc, fw_event);
	fw_event_work_put(fw_event);
}

static struct fw_event_work *dequeue_next_fw_event(struct MPT3SAS_ADAPTER *ioc)
{
	unsigned long flags;
	struct fw_event_work *fw_event = NULL;

	spin_lock_irqsave(&ioc->fw_event_lock, flags);
	if (!list_empty(&ioc->fw_event_list)) {
		fw_event = list_first_entry(&ioc->fw_event_list,
				struct fw_event_work, list);
		list_del_init(&fw_event->list);
		fw_event_work_put(fw_event);
	}
	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);

	return fw_event;
}

/**
 * _scsih_fw_event_cleanup_queue - cleanup event queue
 * @ioc: per adapter object
 *
 * Walk the firmware event queue, either killing timers, or waiting
 * for outstanding events to complete
 *
 * Context: task, can sleep
 */
static void
_scsih_fw_event_cleanup_queue(struct MPT3SAS_ADAPTER *ioc)
{
	struct fw_event_work *fw_event;

	if ((list_empty(&ioc->fw_event_list) && !ioc->current_event) ||
	    !ioc->firmware_event_thread)
		return;
	/*
	 * Set current running event as ignore, so that
	 * current running event will exit quickly.
	 * As diag reset has occurred it is of no use
	 * to process remaining stale event data entries.
	 */
	if (ioc->shost_recovery && ioc->current_event)
		ioc->current_event->ignore = 1;

	ioc->fw_events_cleanup = 1;
	while ((fw_event = dequeue_next_fw_event(ioc)) ||
	     (fw_event = ioc->current_event)) {

		/*
		 * Don't call cancel_work_sync() for current_event
		 * other than MPT3SAS_REMOVE_UNRESPONDING_DEVICES;
		 * otherwise we may observe deadlock if current
		 * hard reset issued as part of processing the current_event.
		 *
		 * Orginal logic of cleaning the current_event is added
		 * for handling the back to back host reset issued by the user.
		 * i.e. during back to back host reset, driver use to process
		 * the two instances of MPT3SAS_REMOVE_UNRESPONDING_DEVICES
		 * event back to back and this made the drives to unregister
		 * the devices from SML.
		 */

		if (fw_event == ioc->current_event &&
		    ioc->current_event->event !=
		    MPT3SAS_REMOVE_UNRESPONDING_DEVICES) {
			ioc->current_event = NULL;
			continue;
		}

		/*
		 * Driver has to clear ioc->start_scan flag when
		 * it is cleaning up MPT3SAS_PORT_ENABLE_COMPLETE,
		 * otherwise scsi_scan_host() API waits for the
		 * 5 minute timer to expire. If we exit from
		 * scsi_scan_host() early then we can issue the
		 * new port enable request as part of current diag reset.
		 */
		if (fw_event->event == MPT3SAS_PORT_ENABLE_COMPLETE) {
			ioc->port_enable_cmds.status |= MPT3_CMD_RESET;
			ioc->start_scan = 0;
		}

		/*
		 * Wait on the fw_event to complete. If this returns 1, then
		 * the event was never executed, and we need a put for the
		 * reference the work had on the fw_event.
		 *
		 * If it did execute, we wait for it to finish, and the put will
		 * happen from _firmware_event_work()
		 */
		if (cancel_work_sync(&fw_event->work))
			fw_event_work_put(fw_event);

	}
	ioc->fw_events_cleanup = 0;
}

/**
 * _scsih_internal_device_block - block the sdev device
 * @sdev: per device object
 * @sas_device_priv_data : per device driver private data
 *
 * make sure device is blocked without error, if not
 * print an error
 */
static void
_scsih_internal_device_block(struct scsi_device *sdev,
			struct MPT3SAS_DEVICE *sas_device_priv_data)
{
	int r = 0;

	sdev_printk(KERN_INFO, sdev, "device_block, handle(0x%04x)\n",
	    sas_device_priv_data->sas_target->handle);
	sas_device_priv_data->block = 1;

	r = scsi_internal_device_block_nowait(sdev);
	if (r == -EINVAL)
		sdev_printk(KERN_WARNING, sdev,
		    "device_block failed with return(%d) for handle(0x%04x)\n",
		    r, sas_device_priv_data->sas_target->handle);
}

/**
 * _scsih_internal_device_unblock - unblock the sdev device
 * @sdev: per device object
 * @sas_device_priv_data : per device driver private data
 * make sure device is unblocked without error, if not retry
 * by blocking and then unblocking
 */

static void
_scsih_internal_device_unblock(struct scsi_device *sdev,
			struct MPT3SAS_DEVICE *sas_device_priv_data)
{
	int r = 0;

	sdev_printk(KERN_WARNING, sdev, "device_unblock and setting to running, "
	    "handle(0x%04x)\n", sas_device_priv_data->sas_target->handle);
	sas_device_priv_data->block = 0;
	r = scsi_internal_device_unblock_nowait(sdev, SDEV_RUNNING);
	if (r == -EINVAL) {
		/* The device has been set to SDEV_RUNNING by SD layer during
		 * device addition but the request queue is still stopped by
		 * our earlier block call. We need to perform a block again
		 * to get the device to SDEV_BLOCK and then to SDEV_RUNNING */

		sdev_printk(KERN_WARNING, sdev,
		    "device_unblock failed with return(%d) for handle(0x%04x) "
		    "performing a block followed by an unblock\n",
		    r, sas_device_priv_data->sas_target->handle);
		sas_device_priv_data->block = 1;
		r = scsi_internal_device_block_nowait(sdev);
		if (r)
			sdev_printk(KERN_WARNING, sdev, "retried device_block "
			    "failed with return(%d) for handle(0x%04x)\n",
			    r, sas_device_priv_data->sas_target->handle);

		sas_device_priv_data->block = 0;
		r = scsi_internal_device_unblock_nowait(sdev, SDEV_RUNNING);
		if (r)
			sdev_printk(KERN_WARNING, sdev, "retried device_unblock"
			    " failed with return(%d) for handle(0x%04x)\n",
			    r, sas_device_priv_data->sas_target->handle);
	}
}

/**
 * _scsih_ublock_io_all_device - unblock every device
 * @ioc: per adapter object
 *
 * change the device state from block to running
 */
static void
_scsih_ublock_io_all_device(struct MPT3SAS_ADAPTER *ioc)
{
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct scsi_device *sdev;

	shost_for_each_device(sdev, ioc->shost) {
		sas_device_priv_data = sdev->hostdata;
		if (!sas_device_priv_data)
			continue;
		if (!sas_device_priv_data->block)
			continue;

		dewtprintk(ioc, sdev_printk(KERN_INFO, sdev,
			"device_running, handle(0x%04x)\n",
		    sas_device_priv_data->sas_target->handle));
		_scsih_internal_device_unblock(sdev, sas_device_priv_data);
	}
}


/**
 * _scsih_ublock_io_device - prepare device to be deleted
 * @ioc: per adapter object
 * @sas_address: sas address
 * @port: hba port entry
 *
 * unblock then put device in offline state
 */
static void
_scsih_ublock_io_device(struct MPT3SAS_ADAPTER *ioc,
	u64 sas_address, struct hba_port *port)
{
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct scsi_device *sdev;

	shost_for_each_device(sdev, ioc->shost) {
		sas_device_priv_data = sdev->hostdata;
		if (!sas_device_priv_data || !sas_device_priv_data->sas_target)
			continue;
		if (sas_device_priv_data->sas_target->sas_address
		    != sas_address)
			continue;
		if (sas_device_priv_data->sas_target->port != port)
			continue;
		if (sas_device_priv_data->block)
			_scsih_internal_device_unblock(sdev,
				sas_device_priv_data);
	}
}

/**
 * _scsih_block_io_all_device - set the device state to SDEV_BLOCK
 * @ioc: per adapter object
 *
 * During device pull we need to appropriately set the sdev state.
 */
static void
_scsih_block_io_all_device(struct MPT3SAS_ADAPTER *ioc)
{
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct scsi_device *sdev;

	shost_for_each_device(sdev, ioc->shost) {
		sas_device_priv_data = sdev->hostdata;
		if (!sas_device_priv_data)
			continue;
		if (sas_device_priv_data->block)
			continue;
		if (sas_device_priv_data->ignore_delay_remove) {
			sdev_printk(KERN_INFO, sdev,
			"%s skip device_block for SES handle(0x%04x)\n",
			__func__, sas_device_priv_data->sas_target->handle);
			continue;
		}
		_scsih_internal_device_block(sdev, sas_device_priv_data);
	}
}

/**
 * _scsih_block_io_device - set the device state to SDEV_BLOCK
 * @ioc: per adapter object
 * @handle: device handle
 *
 * During device pull we need to appropriately set the sdev state.
 */
static void
_scsih_block_io_device(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct scsi_device *sdev;
	struct _sas_device *sas_device;

	sas_device = mpt3sas_get_sdev_by_handle(ioc, handle);

	shost_for_each_device(sdev, ioc->shost) {
		sas_device_priv_data = sdev->hostdata;
		if (!sas_device_priv_data)
			continue;
		if (sas_device_priv_data->sas_target->handle != handle)
			continue;
		if (sas_device_priv_data->block)
			continue;
		if (sas_device && sas_device->pend_sas_rphy_add)
			continue;
		if (sas_device_priv_data->ignore_delay_remove) {
			sdev_printk(KERN_INFO, sdev,
			"%s skip device_block for SES handle(0x%04x)\n",
			__func__, sas_device_priv_data->sas_target->handle);
			continue;
		}
		_scsih_internal_device_block(sdev, sas_device_priv_data);
	}

	if (sas_device)
		sas_device_put(sas_device);
}

/**
 * _scsih_block_io_to_children_attached_to_ex
 * @ioc: per adapter object
 * @sas_expander: the sas_device object
 *
 * This routine set sdev state to SDEV_BLOCK for all devices
 * attached to this expander. This function called when expander is
 * pulled.
 */
static void
_scsih_block_io_to_children_attached_to_ex(struct MPT3SAS_ADAPTER *ioc,
	struct _sas_node *sas_expander)
{
	struct _sas_port *mpt3sas_port;
	struct _sas_device *sas_device;
	struct _sas_node *expander_sibling;
	unsigned long flags;

	if (!sas_expander)
		return;

	list_for_each_entry(mpt3sas_port,
	   &sas_expander->sas_port_list, port_list) {
		if (mpt3sas_port->remote_identify.device_type ==
		    SAS_END_DEVICE) {
			spin_lock_irqsave(&ioc->sas_device_lock, flags);
			sas_device = __mpt3sas_get_sdev_by_addr(ioc,
			    mpt3sas_port->remote_identify.sas_address,
			    mpt3sas_port->hba_port);
			if (sas_device) {
				set_bit(sas_device->handle,
						ioc->blocking_handles);
				sas_device_put(sas_device);
			}
			spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
		}
	}

	list_for_each_entry(mpt3sas_port,
	   &sas_expander->sas_port_list, port_list) {

		if (mpt3sas_port->remote_identify.device_type ==
		    SAS_EDGE_EXPANDER_DEVICE ||
		    mpt3sas_port->remote_identify.device_type ==
		    SAS_FANOUT_EXPANDER_DEVICE) {
			expander_sibling =
			    mpt3sas_scsih_expander_find_by_sas_address(
			    ioc, mpt3sas_port->remote_identify.sas_address,
			    mpt3sas_port->hba_port);
			_scsih_block_io_to_children_attached_to_ex(ioc,
			    expander_sibling);
		}
	}
}

/**
 * _scsih_block_io_to_children_attached_directly
 * @ioc: per adapter object
 * @event_data: topology change event data
 *
 * This routine set sdev state to SDEV_BLOCK for all devices
 * direct attached during device pull.
 */
static void
_scsih_block_io_to_children_attached_directly(struct MPT3SAS_ADAPTER *ioc,
	Mpi2EventDataSasTopologyChangeList_t *event_data)
{
	int i;
	u16 handle;
	u16 reason_code;

	for (i = 0; i < event_data->NumEntries; i++) {
		handle = le16_to_cpu(event_data->PHY[i].AttachedDevHandle);
		if (!handle)
			continue;
		reason_code = event_data->PHY[i].PhyStatus &
		    MPI2_EVENT_SAS_TOPO_RC_MASK;
		if (reason_code == MPI2_EVENT_SAS_TOPO_RC_DELAY_NOT_RESPONDING)
			_scsih_block_io_device(ioc, handle);
	}
}

/**
 * _scsih_block_io_to_pcie_children_attached_directly
 * @ioc: per adapter object
 * @event_data: topology change event data
 *
 * This routine set sdev state to SDEV_BLOCK for all devices
 * direct attached during device pull/reconnect.
 */
static void
_scsih_block_io_to_pcie_children_attached_directly(struct MPT3SAS_ADAPTER *ioc,
		Mpi26EventDataPCIeTopologyChangeList_t *event_data)
{
	int i;
	u16 handle;
	u16 reason_code;

	for (i = 0; i < event_data->NumEntries; i++) {
		handle =
			le16_to_cpu(event_data->PortEntry[i].AttachedDevHandle);
		if (!handle)
			continue;
		reason_code = event_data->PortEntry[i].PortStatus;
		if (reason_code ==
				MPI26_EVENT_PCIE_TOPO_PS_DELAY_NOT_RESPONDING)
			_scsih_block_io_device(ioc, handle);
	}
}
/**
 * _scsih_tm_tr_send - send task management request
 * @ioc: per adapter object
 * @handle: device handle
 * Context: interrupt time.
 *
 * This code is to initiate the device removal handshake protocol
 * with controller firmware.  This function will issue target reset
 * using high priority request queue.  It will send a sas iounit
 * control request (MPI2_SAS_OP_REMOVE_DEVICE) from this completion.
 *
 * This is designed to send muliple task management request at the same
 * time to the fifo. If the fifo is full, we will append the request,
 * and process it in a future completion.
 */
static void
_scsih_tm_tr_send(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	Mpi2SCSITaskManagementRequest_t *mpi_request;
	u16 smid;
	struct _sas_device *sas_device = NULL;
	struct _pcie_device *pcie_device = NULL;
	struct MPT3SAS_TARGET *sas_target_priv_data = NULL;
	u64 sas_address = 0;
	unsigned long flags;
	struct _tr_list *delayed_tr;
	u32 ioc_state;
	u8 tr_method = 0;
	struct hba_port *port = NULL;

	if (ioc->pci_error_recovery) {
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: host in pci error recovery: handle(0x%04x)\n",
				    __func__, handle));
		return;
	}
	ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
	if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: host is not operational: handle(0x%04x)\n",
				    __func__, handle));
		return;
	}

	/* if PD, then return */
	if (test_bit(handle, ioc->pd_handles))
		return;

	clear_bit(handle, ioc->pend_os_device_add);

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device = __mpt3sas_get_sdev_by_handle(ioc, handle);
	if (sas_device && sas_device->starget &&
	    sas_device->starget->hostdata) {
		sas_target_priv_data = sas_device->starget->hostdata;
		sas_target_priv_data->deleted = 1;
		sas_address = sas_device->sas_address;
		port = sas_device->port;
	}
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
	if (!sas_device) {
		spin_lock_irqsave(&ioc->pcie_device_lock, flags);
		pcie_device = __mpt3sas_get_pdev_by_handle(ioc, handle);
		if (pcie_device && pcie_device->starget &&
			pcie_device->starget->hostdata) {
			sas_target_priv_data = pcie_device->starget->hostdata;
			sas_target_priv_data->deleted = 1;
			sas_address = pcie_device->wwid;
		}
		spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
		if (pcie_device && (!ioc->tm_custom_handling) &&
		    (!(mpt3sas_scsih_is_pcie_scsi_device(
		    pcie_device->device_info))))
			tr_method =
			    MPI26_SCSITASKMGMT_MSGFLAGS_PROTOCOL_LVL_RST_PCIE;
		else
			tr_method = MPI2_SCSITASKMGMT_MSGFLAGS_LINK_RESET;
	}
	if (sas_target_priv_data) {
		dewtprintk(ioc,
			   ioc_info(ioc, "setting delete flag: handle(0x%04x), sas_addr(0x%016llx)\n",
				    handle, (u64)sas_address));
		if (sas_device) {
			if (sas_device->enclosure_handle != 0)
				dewtprintk(ioc,
					   ioc_info(ioc, "setting delete flag:enclosure logical id(0x%016llx), slot(%d)\n",
						    (u64)sas_device->enclosure_logical_id,
						    sas_device->slot));
			if (sas_device->connector_name[0] != '\0')
				dewtprintk(ioc,
					   ioc_info(ioc, "setting delete flag: enclosure level(0x%04x), connector name( %s)\n",
						    sas_device->enclosure_level,
						    sas_device->connector_name));
		} else if (pcie_device) {
			if (pcie_device->enclosure_handle != 0)
				dewtprintk(ioc,
					   ioc_info(ioc, "setting delete flag: logical id(0x%016llx), slot(%d)\n",
						    (u64)pcie_device->enclosure_logical_id,
						    pcie_device->slot));
			if (pcie_device->connector_name[0] != '\0')
				dewtprintk(ioc,
					   ioc_info(ioc, "setting delete flag:, enclosure level(0x%04x), connector name( %s)\n",
						    pcie_device->enclosure_level,
						    pcie_device->connector_name));
		}
		_scsih_ublock_io_device(ioc, sas_address, port);
		sas_target_priv_data->handle = MPT3SAS_INVALID_DEVICE_HANDLE;
	}

	smid = mpt3sas_base_get_smid_hpr(ioc, ioc->tm_tr_cb_idx);
	if (!smid) {
		delayed_tr = kzalloc(sizeof(*delayed_tr), GFP_ATOMIC);
		if (!delayed_tr)
			goto out;
		INIT_LIST_HEAD(&delayed_tr->list);
		delayed_tr->handle = handle;
		list_add_tail(&delayed_tr->list, &ioc->delayed_tr_list);
		dewtprintk(ioc,
			   ioc_info(ioc, "DELAYED:tr:handle(0x%04x), (open)\n",
				    handle));
		goto out;
	}

	dewtprintk(ioc,
		   ioc_info(ioc, "tr_send:handle(0x%04x), (open), smid(%d), cb(%d)\n",
			    handle, smid, ioc->tm_tr_cb_idx));
	mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
	memset(mpi_request, 0, sizeof(Mpi2SCSITaskManagementRequest_t));
	mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
	mpi_request->DevHandle = cpu_to_le16(handle);
	mpi_request->TaskType = MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET;
	mpi_request->MsgFlags = tr_method;
	set_bit(handle, ioc->device_remove_in_progress);
	ioc->put_smid_hi_priority(ioc, smid, 0);
	mpt3sas_trigger_master(ioc, MASTER_TRIGGER_DEVICE_REMOVAL);

out:
	if (sas_device)
		sas_device_put(sas_device);
	if (pcie_device)
		pcie_device_put(pcie_device);
}

/**
 * _scsih_tm_tr_complete -
 * @ioc: per adapter object
 * @smid: system request message index
 * @msix_index: MSIX table index supplied by the OS
 * @reply: reply message frame(lower 32bit addr)
 * Context: interrupt time.
 *
 * This is the target reset completion routine.
 * This code is part of the code to initiate the device removal
 * handshake protocol with controller firmware.
 * It will send a sas iounit control request (MPI2_SAS_OP_REMOVE_DEVICE)
 *
 * Return: 1 meaning mf should be freed from _base_interrupt
 *         0 means the mf is freed from this function.
 */
static u8
_scsih_tm_tr_complete(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
	u32 reply)
{
	u16 handle;
	Mpi2SCSITaskManagementRequest_t *mpi_request_tm;
	Mpi2SCSITaskManagementReply_t *mpi_reply =
	    mpt3sas_base_get_reply_virt_addr(ioc, reply);
	Mpi2SasIoUnitControlRequest_t *mpi_request;
	u16 smid_sas_ctrl;
	u32 ioc_state;
	struct _sc_list *delayed_sc;

	if (ioc->pci_error_recovery) {
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: host in pci error recovery\n",
				    __func__));
		return 1;
	}
	ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
	if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: host is not operational\n",
				    __func__));
		return 1;
	}
	if (unlikely(!mpi_reply)) {
		ioc_err(ioc, "mpi_reply not valid at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return 1;
	}
	mpi_request_tm = mpt3sas_base_get_msg_frame(ioc, smid);
	handle = le16_to_cpu(mpi_request_tm->DevHandle);
	if (handle != le16_to_cpu(mpi_reply->DevHandle)) {
		dewtprintk(ioc,
			   ioc_err(ioc, "spurious interrupt: handle(0x%04x:0x%04x), smid(%d)!!!\n",
				   handle,
				   le16_to_cpu(mpi_reply->DevHandle), smid));
		return 0;
	}

	mpt3sas_trigger_master(ioc, MASTER_TRIGGER_TASK_MANAGMENT);
	dewtprintk(ioc,
		   ioc_info(ioc, "tr_complete:handle(0x%04x), (open) smid(%d), ioc_status(0x%04x), loginfo(0x%08x), completed(%d)\n",
			    handle, smid, le16_to_cpu(mpi_reply->IOCStatus),
			    le32_to_cpu(mpi_reply->IOCLogInfo),
			    le32_to_cpu(mpi_reply->TerminationCount)));

	smid_sas_ctrl = mpt3sas_base_get_smid(ioc, ioc->tm_sas_control_cb_idx);
	if (!smid_sas_ctrl) {
		delayed_sc = kzalloc(sizeof(*delayed_sc), GFP_ATOMIC);
		if (!delayed_sc)
			return _scsih_check_for_pending_tm(ioc, smid);
		INIT_LIST_HEAD(&delayed_sc->list);
		delayed_sc->handle = le16_to_cpu(mpi_request_tm->DevHandle);
		list_add_tail(&delayed_sc->list, &ioc->delayed_sc_list);
		dewtprintk(ioc,
			   ioc_info(ioc, "DELAYED:sc:handle(0x%04x), (open)\n",
				    handle));
		return _scsih_check_for_pending_tm(ioc, smid);
	}

	dewtprintk(ioc,
		   ioc_info(ioc, "sc_send:handle(0x%04x), (open), smid(%d), cb(%d)\n",
			    handle, smid_sas_ctrl, ioc->tm_sas_control_cb_idx));
	mpi_request = mpt3sas_base_get_msg_frame(ioc, smid_sas_ctrl);
	memset(mpi_request, 0, sizeof(Mpi2SasIoUnitControlRequest_t));
	mpi_request->Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
	mpi_request->Operation = MPI2_SAS_OP_REMOVE_DEVICE;
	mpi_request->DevHandle = mpi_request_tm->DevHandle;
	ioc->put_smid_default(ioc, smid_sas_ctrl);

	return _scsih_check_for_pending_tm(ioc, smid);
}

/** _scsih_allow_scmd_to_device - check whether scmd needs to
 *				 issue to IOC or not.
 * @ioc: per adapter object
 * @scmd: pointer to scsi command object
 *
 * Returns true if scmd can be issued to IOC otherwise returns false.
 */
inline bool _scsih_allow_scmd_to_device(struct MPT3SAS_ADAPTER *ioc,
	struct scsi_cmnd *scmd)
{

	if (ioc->pci_error_recovery)
		return false;

	if (ioc->hba_mpi_version_belonged == MPI2_VERSION) {
		if (ioc->remove_host)
			return false;

		return true;
	}

	if (ioc->remove_host) {

		switch (scmd->cmnd[0]) {
		case SYNCHRONIZE_CACHE:
		case START_STOP:
			return true;
		default:
			return false;
		}
	}

	return true;
}

/**
 * _scsih_sas_control_complete - completion routine
 * @ioc: per adapter object
 * @smid: system request message index
 * @msix_index: MSIX table index supplied by the OS
 * @reply: reply message frame(lower 32bit addr)
 * Context: interrupt time.
 *
 * This is the sas iounit control completion routine.
 * This code is part of the code to initiate the device removal
 * handshake protocol with controller firmware.
 *
 * Return: 1 meaning mf should be freed from _base_interrupt
 *         0 means the mf is freed from this function.
 */
static u8
_scsih_sas_control_complete(struct MPT3SAS_ADAPTER *ioc, u16 smid,
	u8 msix_index, u32 reply)
{
	Mpi2SasIoUnitControlReply_t *mpi_reply =
	    mpt3sas_base_get_reply_virt_addr(ioc, reply);

	if (likely(mpi_reply)) {
		dewtprintk(ioc,
			   ioc_info(ioc, "sc_complete:handle(0x%04x), (open) smid(%d), ioc_status(0x%04x), loginfo(0x%08x)\n",
				    le16_to_cpu(mpi_reply->DevHandle), smid,
				    le16_to_cpu(mpi_reply->IOCStatus),
				    le32_to_cpu(mpi_reply->IOCLogInfo)));
		if (le16_to_cpu(mpi_reply->IOCStatus) ==
		     MPI2_IOCSTATUS_SUCCESS) {
			clear_bit(le16_to_cpu(mpi_reply->DevHandle),
			    ioc->device_remove_in_progress);
		}
	} else {
		ioc_err(ioc, "mpi_reply not valid at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
	}
	return mpt3sas_check_for_pending_internal_cmds(ioc, smid);
}

/**
 * _scsih_tm_tr_volume_send - send target reset request for volumes
 * @ioc: per adapter object
 * @handle: device handle
 * Context: interrupt time.
 *
 * This is designed to send muliple task management request at the same
 * time to the fifo. If the fifo is full, we will append the request,
 * and process it in a future completion.
 */
static void
_scsih_tm_tr_volume_send(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	Mpi2SCSITaskManagementRequest_t *mpi_request;
	u16 smid;
	struct _tr_list *delayed_tr;

	if (ioc->pci_error_recovery) {
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: host reset in progress!\n",
				    __func__));
		return;
	}

	smid = mpt3sas_base_get_smid_hpr(ioc, ioc->tm_tr_volume_cb_idx);
	if (!smid) {
		delayed_tr = kzalloc(sizeof(*delayed_tr), GFP_ATOMIC);
		if (!delayed_tr)
			return;
		INIT_LIST_HEAD(&delayed_tr->list);
		delayed_tr->handle = handle;
		list_add_tail(&delayed_tr->list, &ioc->delayed_tr_volume_list);
		dewtprintk(ioc,
			   ioc_info(ioc, "DELAYED:tr:handle(0x%04x), (open)\n",
				    handle));
		return;
	}

	dewtprintk(ioc,
		   ioc_info(ioc, "tr_send:handle(0x%04x), (open), smid(%d), cb(%d)\n",
			    handle, smid, ioc->tm_tr_volume_cb_idx));
	mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
	memset(mpi_request, 0, sizeof(Mpi2SCSITaskManagementRequest_t));
	mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
	mpi_request->DevHandle = cpu_to_le16(handle);
	mpi_request->TaskType = MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET;
	ioc->put_smid_hi_priority(ioc, smid, 0);
}

/**
 * _scsih_tm_volume_tr_complete - target reset completion
 * @ioc: per adapter object
 * @smid: system request message index
 * @msix_index: MSIX table index supplied by the OS
 * @reply: reply message frame(lower 32bit addr)
 * Context: interrupt time.
 *
 * Return: 1 meaning mf should be freed from _base_interrupt
 *         0 means the mf is freed from this function.
 */
static u8
_scsih_tm_volume_tr_complete(struct MPT3SAS_ADAPTER *ioc, u16 smid,
	u8 msix_index, u32 reply)
{
	u16 handle;
	Mpi2SCSITaskManagementRequest_t *mpi_request_tm;
	Mpi2SCSITaskManagementReply_t *mpi_reply =
	    mpt3sas_base_get_reply_virt_addr(ioc, reply);

	if (ioc->shost_recovery || ioc->pci_error_recovery) {
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: host reset in progress!\n",
				    __func__));
		return 1;
	}
	if (unlikely(!mpi_reply)) {
		ioc_err(ioc, "mpi_reply not valid at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return 1;
	}

	mpi_request_tm = mpt3sas_base_get_msg_frame(ioc, smid);
	handle = le16_to_cpu(mpi_request_tm->DevHandle);
	if (handle != le16_to_cpu(mpi_reply->DevHandle)) {
		dewtprintk(ioc,
			   ioc_err(ioc, "spurious interrupt: handle(0x%04x:0x%04x), smid(%d)!!!\n",
				   handle, le16_to_cpu(mpi_reply->DevHandle),
				   smid));
		return 0;
	}

	dewtprintk(ioc,
		   ioc_info(ioc, "tr_complete:handle(0x%04x), (open) smid(%d), ioc_status(0x%04x), loginfo(0x%08x), completed(%d)\n",
			    handle, smid, le16_to_cpu(mpi_reply->IOCStatus),
			    le32_to_cpu(mpi_reply->IOCLogInfo),
			    le32_to_cpu(mpi_reply->TerminationCount)));

	return _scsih_check_for_pending_tm(ioc, smid);
}

/**
 * _scsih_issue_delayed_event_ack - issue delayed Event ACK messages
 * @ioc: per adapter object
 * @smid: system request message index
 * @event: Event ID
 * @event_context: used to track events uniquely
 *
 * Context - processed in interrupt context.
 */
static void
_scsih_issue_delayed_event_ack(struct MPT3SAS_ADAPTER *ioc, u16 smid, U16 event,
				U32 event_context)
{
	Mpi2EventAckRequest_t *ack_request;
	int i = smid - ioc->internal_smid;
	unsigned long flags;

	/* Without releasing the smid just update the
	 * call back index and reuse the same smid for
	 * processing this delayed request
	 */
	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
	ioc->internal_lookup[i].cb_idx = ioc->base_cb_idx;
	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);

	dewtprintk(ioc,
		   ioc_info(ioc, "EVENT ACK: event(0x%04x), smid(%d), cb(%d)\n",
			    le16_to_cpu(event), smid, ioc->base_cb_idx));
	ack_request = mpt3sas_base_get_msg_frame(ioc, smid);
	memset(ack_request, 0, sizeof(Mpi2EventAckRequest_t));
	ack_request->Function = MPI2_FUNCTION_EVENT_ACK;
	ack_request->Event = event;
	ack_request->EventContext = event_context;
	ack_request->VF_ID = 0;  /* TODO */
	ack_request->VP_ID = 0;
	ioc->put_smid_default(ioc, smid);
}

/**
 * _scsih_issue_delayed_sas_io_unit_ctrl - issue delayed
 *				sas_io_unit_ctrl messages
 * @ioc: per adapter object
 * @smid: system request message index
 * @handle: device handle
 *
 * Context - processed in interrupt context.
 */
static void
_scsih_issue_delayed_sas_io_unit_ctrl(struct MPT3SAS_ADAPTER *ioc,
					u16 smid, u16 handle)
{
	Mpi2SasIoUnitControlRequest_t *mpi_request;
	u32 ioc_state;
	int i = smid - ioc->internal_smid;
	unsigned long flags;

	if (ioc->remove_host) {
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: host has been removed\n",
				    __func__));
		return;
	} else if (ioc->pci_error_recovery) {
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: host in pci error recovery\n",
				    __func__));
		return;
	}
	ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
	if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
		dewtprintk(ioc,
			   ioc_info(ioc, "%s: host is not operational\n",
				    __func__));
		return;
	}

	/* Without releasing the smid just update the
	 * call back index and reuse the same smid for
	 * processing this delayed request
	 */
	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
	ioc->internal_lookup[i].cb_idx = ioc->tm_sas_control_cb_idx;
	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);

	dewtprintk(ioc,
		   ioc_info(ioc, "sc_send:handle(0x%04x), (open), smid(%d), cb(%d)\n",
			    handle, smid, ioc->tm_sas_control_cb_idx));
	mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
	memset(mpi_request, 0, sizeof(Mpi2SasIoUnitControlRequest_t));
	mpi_request->Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
	mpi_request->Operation = MPI2_SAS_OP_REMOVE_DEVICE;
	mpi_request->DevHandle = cpu_to_le16(handle);
	ioc->put_smid_default(ioc, smid);
}

/**
 * mpt3sas_check_for_pending_internal_cmds - check for pending internal messages
 * @ioc: per adapter object
 * @smid: system request message index
 *
 * Context: Executed in interrupt context
 *
 * This will check delayed internal messages list, and process the
 * next request.
 *
 * Return: 1 meaning mf should be freed from _base_interrupt
 *         0 means the mf is freed from this function.
 */
u8
mpt3sas_check_for_pending_internal_cmds(struct MPT3SAS_ADAPTER *ioc, u16 smid)
{
	struct _sc_list *delayed_sc;
	struct _event_ack_list *delayed_event_ack;

	if (!list_empty(&ioc->delayed_event_ack_list)) {
		delayed_event_ack = list_entry(ioc->delayed_event_ack_list.next,
						struct _event_ack_list, list);
		_scsih_issue_delayed_event_ack(ioc, smid,
		  delayed_event_ack->Event, delayed_event_ack->EventContext);
		list_del(&delayed_event_ack->list);
		kfree(delayed_event_ack);
		return 0;
	}

	if (!list_empty(&ioc->delayed_sc_list)) {
		delayed_sc = list_entry(ioc->delayed_sc_list.next,
						struct _sc_list, list);
		_scsih_issue_delayed_sas_io_unit_ctrl(ioc, smid,
						 delayed_sc->handle);
		list_del(&delayed_sc->list);
		kfree(delayed_sc);
		return 0;
	}
	return 1;
}

/**
 * _scsih_check_for_pending_tm - check for pending task management
 * @ioc: per adapter object
 * @smid: system request message index
 *
 * This will check delayed target reset list, and feed the
 * next reqeust.
 *
 * Return: 1 meaning mf should be freed from _base_interrupt
 *         0 means the mf is freed from this function.
 */
static u8
_scsih_check_for_pending_tm(struct MPT3SAS_ADAPTER *ioc, u16 smid)
{
	struct _tr_list *delayed_tr;

	if (!list_empty(&ioc->delayed_tr_volume_list)) {
		delayed_tr = list_entry(ioc->delayed_tr_volume_list.next,
		    struct _tr_list, list);
		mpt3sas_base_free_smid(ioc, smid);
		_scsih_tm_tr_volume_send(ioc, delayed_tr->handle);
		list_del(&delayed_tr->list);
		kfree(delayed_tr);
		return 0;
	}

	if (!list_empty(&ioc->delayed_tr_list)) {
		delayed_tr = list_entry(ioc->delayed_tr_list.next,
		    struct _tr_list, list);
		mpt3sas_base_free_smid(ioc, smid);
		_scsih_tm_tr_send(ioc, delayed_tr->handle);
		list_del(&delayed_tr->list);
		kfree(delayed_tr);
		return 0;
	}

	return 1;
}

/**
 * _scsih_check_topo_delete_events - sanity check on topo events
 * @ioc: per adapter object
 * @event_data: the event data payload
 *
 * This routine added to better handle cable breaker.
 *
 * This handles the case where driver receives multiple expander
 * add and delete events in a single shot.  When there is a delete event
 * the routine will void any pending add events waiting in the event queue.
 */
static void
_scsih_check_topo_delete_events(struct MPT3SAS_ADAPTER *ioc,
	Mpi2EventDataSasTopologyChangeList_t *event_data)
{
	struct fw_event_work *fw_event;
	Mpi2EventDataSasTopologyChangeList_t *local_event_data;
	u16 expander_handle;
	struct _sas_node *sas_expander;
	unsigned long flags;
	int i, reason_code;
	u16 handle;

	for (i = 0 ; i < event_data->NumEntries; i++) {
		handle = le16_to_cpu(event_data->PHY[i].AttachedDevHandle);
		if (!handle)
			continue;
		reason_code = event_data->PHY[i].PhyStatus &
		    MPI2_EVENT_SAS_TOPO_RC_MASK;
		if (reason_code == MPI2_EVENT_SAS_TOPO_RC_TARG_NOT_RESPONDING)
			_scsih_tm_tr_send(ioc, handle);
	}

	expander_handle = le16_to_cpu(event_data->ExpanderDevHandle);
	if (expander_handle < ioc->sas_hba.num_phys) {
		_scsih_block_io_to_children_attached_directly(ioc, event_data);
		return;
	}
	if (event_data->ExpStatus ==
	    MPI2_EVENT_SAS_TOPO_ES_DELAY_NOT_RESPONDING) {
		/* put expander attached devices into blocking state */
		spin_lock_irqsave(&ioc->sas_node_lock, flags);
		sas_expander = mpt3sas_scsih_expander_find_by_handle(ioc,
		    expander_handle);
		_scsih_block_io_to_children_attached_to_ex(ioc, sas_expander);
		spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
		do {
			handle = find_first_bit(ioc->blocking_handles,
			    ioc->facts.MaxDevHandle);
			if (handle < ioc->facts.MaxDevHandle)
				_scsih_block_io_device(ioc, handle);
		} while (test_and_clear_bit(handle, ioc->blocking_handles));
	} else if (event_data->ExpStatus == MPI2_EVENT_SAS_TOPO_ES_RESPONDING)
		_scsih_block_io_to_children_attached_directly(ioc, event_data);

	if (event_data->ExpStatus != MPI2_EVENT_SAS_TOPO_ES_NOT_RESPONDING)
		return;

	/* mark ignore flag for pending events */
	spin_lock_irqsave(&ioc->fw_event_lock, flags);
	list_for_each_entry(fw_event, &ioc->fw_event_list, list) {
		if (fw_event->event != MPI2_EVENT_SAS_TOPOLOGY_CHANGE_LIST ||
		    fw_event->ignore)
			continue;
		local_event_data = (Mpi2EventDataSasTopologyChangeList_t *)
				   fw_event->event_data;
		if (local_event_data->ExpStatus ==
		    MPI2_EVENT_SAS_TOPO_ES_ADDED ||
		    local_event_data->ExpStatus ==
		    MPI2_EVENT_SAS_TOPO_ES_RESPONDING) {
			if (le16_to_cpu(local_event_data->ExpanderDevHandle) ==
			    expander_handle) {
				dewtprintk(ioc,
					   ioc_info(ioc, "setting ignoring flag\n"));
				fw_event->ignore = 1;
			}
		}
	}
	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
}

/**
 * _scsih_check_pcie_topo_remove_events - sanity check on topo
 * events
 * @ioc: per adapter object
 * @event_data: the event data payload
 *
 * This handles the case where driver receives multiple switch
 * or device add and delete events in a single shot.  When there
 * is a delete event the routine will void any pending add
 * events waiting in the event queue.
 */
static void
_scsih_check_pcie_topo_remove_events(struct MPT3SAS_ADAPTER *ioc,
	Mpi26EventDataPCIeTopologyChangeList_t *event_data)
{
	struct fw_event_work *fw_event;
	Mpi26EventDataPCIeTopologyChangeList_t *local_event_data;
	unsigned long flags;
	int i, reason_code;
	u16 handle, switch_handle;

	for (i = 0; i < event_data->NumEntries; i++) {
		handle =
			le16_to_cpu(event_data->PortEntry[i].AttachedDevHandle);
		if (!handle)
			continue;
		reason_code = event_data->PortEntry[i].PortStatus;
		if (reason_code == MPI26_EVENT_PCIE_TOPO_PS_NOT_RESPONDING)
			_scsih_tm_tr_send(ioc, handle);
	}

	switch_handle = le16_to_cpu(event_data->SwitchDevHandle);
	if (!switch_handle) {
		_scsih_block_io_to_pcie_children_attached_directly(
							ioc, event_data);
		return;
	}
    /* TODO We are not supporting cascaded PCIe Switch removal yet*/
	if ((event_data->SwitchStatus
		== MPI26_EVENT_PCIE_TOPO_SS_DELAY_NOT_RESPONDING) ||
		(event_data->SwitchStatus ==
					MPI26_EVENT_PCIE_TOPO_SS_RESPONDING))
		_scsih_block_io_to_pcie_children_attached_directly(
							ioc, event_data);

	if (event_data->SwitchStatus != MPI2_EVENT_SAS_TOPO_ES_NOT_RESPONDING)
		return;

	/* mark ignore flag for pending events */
	spin_lock_irqsave(&ioc->fw_event_lock, flags);
	list_for_each_entry(fw_event, &ioc->fw_event_list, list) {
		if (fw_event->event != MPI2_EVENT_PCIE_TOPOLOGY_CHANGE_LIST ||
			fw_event->ignore)
			continue;
		local_event_data =
			(Mpi26EventDataPCIeTopologyChangeList_t *)
			fw_event->event_data;
		if (local_event_data->SwitchStatus ==
		    MPI2_EVENT_SAS_TOPO_ES_ADDED ||
		    local_event_data->SwitchStatus ==
		    MPI2_EVENT_SAS_TOPO_ES_RESPONDING) {
			if (le16_to_cpu(local_event_data->SwitchDevHandle) ==
				switch_handle) {
				dewtprintk(ioc,
					   ioc_info(ioc, "setting ignoring flag for switch event\n"));
				fw_event->ignore = 1;
			}
		}
	}
	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
}

/**
 * _scsih_set_volume_delete_flag - setting volume delete flag
 * @ioc: per adapter object
 * @handle: device handle
 *
 * This returns nothing.
 */
static void
_scsih_set_volume_delete_flag(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _raid_device *raid_device;
	struct MPT3SAS_TARGET *sas_target_priv_data;
	unsigned long flags;

	spin_lock_irqsave(&ioc->raid_device_lock, flags);
	raid_device = mpt3sas_raid_device_find_by_handle(ioc, handle);
	if (raid_device && raid_device->starget &&
	    raid_device->starget->hostdata) {
		sas_target_priv_data =
		    raid_device->starget->hostdata;
		sas_target_priv_data->deleted = 1;
		dewtprintk(ioc,
			   ioc_info(ioc, "setting delete flag: handle(0x%04x), wwid(0x%016llx)\n",
				    handle, (u64)raid_device->wwid));
	}
	spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
}

/**
 * _scsih_set_volume_handle_for_tr - set handle for target reset to volume
 * @handle: input handle
 * @a: handle for volume a
 * @b: handle for volume b
 *
 * IR firmware only supports two raid volumes.  The purpose of this
 * routine is to set the volume handle in either a or b. When the given
 * input handle is non-zero, or when a and b have not been set before.
 */
static void
_scsih_set_volume_handle_for_tr(u16 handle, u16 *a, u16 *b)
{
	if (!handle || handle == *a || handle == *b)
		return;
	if (!*a)
		*a = handle;
	else if (!*b)
		*b = handle;
}

/**
 * _scsih_check_ir_config_unhide_events - check for UNHIDE events
 * @ioc: per adapter object
 * @event_data: the event data payload
 * Context: interrupt time.
 *
 * This routine will send target reset to volume, followed by target
 * resets to the PDs. This is called when a PD has been removed, or
 * volume has been deleted or removed. When the target reset is sent
 * to volume, the PD target resets need to be queued to start upon
 * completion of the volume target reset.
 */
static void
_scsih_check_ir_config_unhide_events(struct MPT3SAS_ADAPTER *ioc,
	Mpi2EventDataIrConfigChangeList_t *event_data)
{
	Mpi2EventIrConfigElement_t *element;
	int i;
	u16 handle, volume_handle, a, b;
	struct _tr_list *delayed_tr;

	a = 0;
	b = 0;

	if (ioc->is_warpdrive)
		return;

	/* Volume Resets for Deleted or Removed */
	element = (Mpi2EventIrConfigElement_t *)&event_data->ConfigElement[0];
	for (i = 0; i < event_data->NumElements; i++, element++) {
		if (le32_to_cpu(event_data->Flags) &
		    MPI2_EVENT_IR_CHANGE_FLAGS_FOREIGN_CONFIG)
			continue;
		if (element->ReasonCode ==
		    MPI2_EVENT_IR_CHANGE_RC_VOLUME_DELETED ||
		    element->ReasonCode ==
		    MPI2_EVENT_IR_CHANGE_RC_REMOVED) {
			volume_handle = le16_to_cpu(element->VolDevHandle);
			_scsih_set_volume_delete_flag(ioc, volume_handle);
			_scsih_set_volume_handle_for_tr(volume_handle, &a, &b);
		}
	}

	/* Volume Resets for UNHIDE events */
	element = (Mpi2EventIrConfigElement_t *)&event_data->ConfigElement[0];
	for (i = 0; i < event_data->NumElements; i++, element++) {
		if (le32_to_cpu(event_data->Flags) &
		    MPI2_EVENT_IR_CHANGE_FLAGS_FOREIGN_CONFIG)
			continue;
		if (element->ReasonCode == MPI2_EVENT_IR_CHANGE_RC_UNHIDE) {
			volume_handle = le16_to_cpu(element->VolDevHandle);
			_scsih_set_volume_handle_for_tr(volume_handle, &a, &b);
		}
	}

	if (a)
		_scsih_tm_tr_volume_send(ioc, a);
	if (b)
		_scsih_tm_tr_volume_send(ioc, b);

	/* PD target resets */
	element = (Mpi2EventIrConfigElement_t *)&event_data->ConfigElement[0];
	for (i = 0; i < event_data->NumElements; i++, element++) {
		if (element->ReasonCode != MPI2_EVENT_IR_CHANGE_RC_UNHIDE)
			continue;
		handle = le16_to_cpu(element->PhysDiskDevHandle);
		volume_handle = le16_to_cpu(element->VolDevHandle);
		clear_bit(handle, ioc->pd_handles);
		if (!volume_handle)
			_scsih_tm_tr_send(ioc, handle);
		else if (volume_handle == a || volume_handle == b) {
			delayed_tr = kzalloc(sizeof(*delayed_tr), GFP_ATOMIC);
			BUG_ON(!delayed_tr);
			INIT_LIST_HEAD(&delayed_tr->list);
			delayed_tr->handle = handle;
			list_add_tail(&delayed_tr->list, &ioc->delayed_tr_list);
			dewtprintk(ioc,
				   ioc_info(ioc, "DELAYED:tr:handle(0x%04x), (open)\n",
					    handle));
		} else
			_scsih_tm_tr_send(ioc, handle);
	}
}


/**
 * _scsih_check_volume_delete_events - set delete flag for volumes
 * @ioc: per adapter object
 * @event_data: the event data payload
 * Context: interrupt time.
 *
 * This will handle the case when the cable connected to entire volume is
 * pulled. We will take care of setting the deleted flag so normal IO will
 * not be sent.
 */
static void
_scsih_check_volume_delete_events(struct MPT3SAS_ADAPTER *ioc,
	Mpi2EventDataIrVolume_t *event_data)
{
	u32 state;

	if (event_data->ReasonCode != MPI2_EVENT_IR_VOLUME_RC_STATE_CHANGED)
		return;
	state = le32_to_cpu(event_data->NewValue);
	if (state == MPI2_RAID_VOL_STATE_MISSING || state ==
	    MPI2_RAID_VOL_STATE_FAILED)
		_scsih_set_volume_delete_flag(ioc,
		    le16_to_cpu(event_data->VolDevHandle));
}

/**
 * _scsih_temp_threshold_events - display temperature threshold exceeded events
 * @ioc: per adapter object
 * @event_data: the temp threshold event data
 * Context: interrupt time.
 */
static void
_scsih_temp_threshold_events(struct MPT3SAS_ADAPTER *ioc,
	Mpi2EventDataTemperature_t *event_data)
{
	u32 doorbell;
	if (ioc->temp_sensors_count >= event_data->SensorNum) {
		ioc_err(ioc, "Temperature Threshold flags %s%s%s%s exceeded for Sensor: %d !!!\n",
			le16_to_cpu(event_data->Status) & 0x1 ? "0 " : " ",
			le16_to_cpu(event_data->Status) & 0x2 ? "1 " : " ",
			le16_to_cpu(event_data->Status) & 0x4 ? "2 " : " ",
			le16_to_cpu(event_data->Status) & 0x8 ? "3 " : " ",
			event_data->SensorNum);
		ioc_err(ioc, "Current Temp In Celsius: %d\n",
			event_data->CurrentTemperature);
		if (ioc->hba_mpi_version_belonged != MPI2_VERSION) {
			doorbell = mpt3sas_base_get_iocstate(ioc, 0);
			if ((doorbell & MPI2_IOC_STATE_MASK) ==
			    MPI2_IOC_STATE_FAULT) {
				mpt3sas_print_fault_code(ioc,
				    doorbell & MPI2_DOORBELL_DATA_MASK);
			} else if ((doorbell & MPI2_IOC_STATE_MASK) ==
			    MPI2_IOC_STATE_COREDUMP) {
				mpt3sas_print_coredump_info(ioc,
				    doorbell & MPI2_DOORBELL_DATA_MASK);
			}
		}
	}
}

static int _scsih_set_satl_pending(struct scsi_cmnd *scmd, bool pending)
{
	struct MPT3SAS_DEVICE *priv = scmd->device->hostdata;

	if (scmd->cmnd[0] != ATA_12 && scmd->cmnd[0] != ATA_16)
		return 0;

	if (pending)
		return test_and_set_bit(0, &priv->ata_command_pending);

	clear_bit(0, &priv->ata_command_pending);
	return 0;
}

/**
 * _scsih_flush_running_cmds - completing outstanding commands.
 * @ioc: per adapter object
 *
 * The flushing out of all pending scmd commands following host reset,
 * where all IO is dropped to the floor.
 */
static void
_scsih_flush_running_cmds(struct MPT3SAS_ADAPTER *ioc)
{
	struct scsi_cmnd *scmd;
	struct scsiio_tracker *st;
	u16 smid;
	int count = 0;

	for (smid = 1; smid <= ioc->scsiio_depth; smid++) {
		scmd = mpt3sas_scsih_scsi_lookup_get(ioc, smid);
		if (!scmd)
			continue;
		count++;
		_scsih_set_satl_pending(scmd, false);
		st = scsi_cmd_priv(scmd);
		mpt3sas_base_clear_st(ioc, st);
		scsi_dma_unmap(scmd);
		if (ioc->pci_error_recovery || ioc->remove_host)
			scmd->result = DID_NO_CONNECT << 16;
		else
			scmd->result = DID_RESET << 16;
		scsi_done(scmd);
	}
	dtmprintk(ioc, ioc_info(ioc, "completing %d cmds\n", count));
}

/**
 * _scsih_setup_eedp - setup MPI request for EEDP transfer
 * @ioc: per adapter object
 * @scmd: pointer to scsi command object
 * @mpi_request: pointer to the SCSI_IO request message frame
 *
 * Supporting protection 1 and 3.
 */
static void
_scsih_setup_eedp(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
	Mpi25SCSIIORequest_t *mpi_request)
{
	u16 eedp_flags;
	Mpi25SCSIIORequest_t *mpi_request_3v =
	   (Mpi25SCSIIORequest_t *)mpi_request;

	switch (scsi_get_prot_op(scmd)) {
	case SCSI_PROT_READ_STRIP:
		eedp_flags = MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP;
		break;
	case SCSI_PROT_WRITE_INSERT:
		eedp_flags = MPI2_SCSIIO_EEDPFLAGS_INSERT_OP;
		break;
	default:
		return;
	}

	if (scmd->prot_flags & SCSI_PROT_GUARD_CHECK)
		eedp_flags |= MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD;

	if (scmd->prot_flags & SCSI_PROT_REF_CHECK)
		eedp_flags |= MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG;

	if (scmd->prot_flags & SCSI_PROT_REF_INCREMENT) {
		eedp_flags |= MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG;

		mpi_request->CDB.EEDP32.PrimaryReferenceTag =
			cpu_to_be32(scsi_prot_ref_tag(scmd));
	}

	mpi_request_3v->EEDPBlockSize = cpu_to_le16(scsi_prot_interval(scmd));

	if (ioc->is_gen35_ioc)
		eedp_flags |= MPI25_SCSIIO_EEDPFLAGS_APPTAG_DISABLE_MODE;
	mpi_request->EEDPFlags = cpu_to_le16(eedp_flags);
}

/**
 * _scsih_eedp_error_handling - return sense code for EEDP errors
 * @scmd: pointer to scsi command object
 * @ioc_status: ioc status
 */
static void
_scsih_eedp_error_handling(struct scsi_cmnd *scmd, u16 ioc_status)
{
	u8 ascq;

	switch (ioc_status) {
	case MPI2_IOCSTATUS_EEDP_GUARD_ERROR:
		ascq = 0x01;
		break;
	case MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR:
		ascq = 0x02;
		break;
	case MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR:
		ascq = 0x03;
		break;
	default:
		ascq = 0x00;
		break;
	}
	scsi_build_sense(scmd, 0, ILLEGAL_REQUEST, 0x10, ascq);
	set_host_byte(scmd, DID_ABORT);
}

/**
 * scsih_qcmd - main scsi request entry point
 * @shost: SCSI host pointer
 * @scmd: pointer to scsi command object
 *
 * The callback index is set inside `ioc->scsi_io_cb_idx`.
 *
 * Return: 0 on success.  If there's a failure, return either:
 * SCSI_MLQUEUE_DEVICE_BUSY if the device queue is full, or
 * SCSI_MLQUEUE_HOST_BUSY if the entire host queue is full
 */
static int
scsih_qcmd(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
{
	struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	struct MPT3SAS_TARGET *sas_target_priv_data;
	struct _raid_device *raid_device;
	struct request *rq = scsi_cmd_to_rq(scmd);
	int class;
	Mpi25SCSIIORequest_t *mpi_request;
	struct _pcie_device *pcie_device = NULL;
	u32 mpi_control;
	u16 smid;
	u16 handle;

	if (ioc->logging_level & MPT_DEBUG_SCSI)
		scsi_print_command(scmd);

	sas_device_priv_data = scmd->device->hostdata;
	if (!sas_device_priv_data || !sas_device_priv_data->sas_target) {
		scmd->result = DID_NO_CONNECT << 16;
		scsi_done(scmd);
		return 0;
	}

	if (!(_scsih_allow_scmd_to_device(ioc, scmd))) {
		scmd->result = DID_NO_CONNECT << 16;
		scsi_done(scmd);
		return 0;
	}

	sas_target_priv_data = sas_device_priv_data->sas_target;

	/* invalid device handle */
	handle = sas_target_priv_data->handle;

	/*
	 * Avoid error handling escallation when device is disconnected
	 */
	if (handle == MPT3SAS_INVALID_DEVICE_HANDLE || sas_device_priv_data->block) {
		if (scmd->device->host->shost_state == SHOST_RECOVERY &&
		    scmd->cmnd[0] == TEST_UNIT_READY) {
			scsi_build_sense(scmd, 0, UNIT_ATTENTION, 0x29, 0x07);
			scsi_done(scmd);
			return 0;
		}
	}

	if (handle == MPT3SAS_INVALID_DEVICE_HANDLE) {
		scmd->result = DID_NO_CONNECT << 16;
		scsi_done(scmd);
		return 0;
	}


	if (ioc->shost_recovery || ioc->ioc_link_reset_in_progress) {
		/* host recovery or link resets sent via IOCTLs */
		return SCSI_MLQUEUE_HOST_BUSY;
	} else if (sas_target_priv_data->deleted) {
		/* device has been deleted */
		scmd->result = DID_NO_CONNECT << 16;
		scsi_done(scmd);
		return 0;
	} else if (sas_target_priv_data->tm_busy ||
		   sas_device_priv_data->block) {
		/* device busy with task management */
		return SCSI_MLQUEUE_DEVICE_BUSY;
	}

	/*
	 * Bug work around for firmware SATL handling.  The loop
	 * is based on atomic operations and ensures consistency
	 * since we're lockless at this point
	 */
	do {
		if (test_bit(0, &sas_device_priv_data->ata_command_pending))
			return SCSI_MLQUEUE_DEVICE_BUSY;
	} while (_scsih_set_satl_pending(scmd, true));

	if (scmd->sc_data_direction == DMA_FROM_DEVICE)
		mpi_control = MPI2_SCSIIO_CONTROL_READ;
	else if (scmd->sc_data_direction == DMA_TO_DEVICE)
		mpi_control = MPI2_SCSIIO_CONTROL_WRITE;
	else
		mpi_control = MPI2_SCSIIO_CONTROL_NODATATRANSFER;

	/* set tags */
	mpi_control |= MPI2_SCSIIO_CONTROL_SIMPLEQ;
	/* NCQ Prio supported, make sure control indicated high priority */
	if (sas_device_priv_data->ncq_prio_enable) {
		class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
		if (class == IOPRIO_CLASS_RT)
			mpi_control |= 1 << MPI2_SCSIIO_CONTROL_CMDPRI_SHIFT;
	}
	/* Make sure Device is not raid volume.
	 * We do not expose raid functionality to upper layer for warpdrive.
	 */
	if (((!ioc->is_warpdrive && !scsih_is_raid(&scmd->device->sdev_gendev))
		&& !scsih_is_nvme(&scmd->device->sdev_gendev))
		&& sas_is_tlr_enabled(scmd->device) && scmd->cmd_len != 32)
		mpi_control |= MPI2_SCSIIO_CONTROL_TLR_ON;

	smid = mpt3sas_base_get_smid_scsiio(ioc, ioc->scsi_io_cb_idx, scmd);
	if (!smid) {
		ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
		_scsih_set_satl_pending(scmd, false);
		goto out;
	}
	mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
	memset(mpi_request, 0, ioc->request_sz);
	_scsih_setup_eedp(ioc, scmd, mpi_request);

	if (scmd->cmd_len == 32)
		mpi_control |= 4 << MPI2_SCSIIO_CONTROL_ADDCDBLEN_SHIFT;
	mpi_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
	if (sas_device_priv_data->sas_target->flags &
	    MPT_TARGET_FLAGS_RAID_COMPONENT)
		mpi_request->Function = MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH;
	else
		mpi_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
	mpi_request->DevHandle = cpu_to_le16(handle);
	mpi_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
	mpi_request->Control = cpu_to_le32(mpi_control);
	mpi_request->IoFlags = cpu_to_le16(scmd->cmd_len);
	mpi_request->MsgFlags = MPI2_SCSIIO_MSGFLAGS_SYSTEM_SENSE_ADDR;
	mpi_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
	mpi_request->SenseBufferLowAddress =
	    mpt3sas_base_get_sense_buffer_dma(ioc, smid);
	mpi_request->SGLOffset0 = offsetof(Mpi25SCSIIORequest_t, SGL) / 4;
	int_to_scsilun(sas_device_priv_data->lun, (struct scsi_lun *)
	    mpi_request->LUN);
	memcpy(mpi_request->CDB.CDB32, scmd->cmnd, scmd->cmd_len);

	if (mpi_request->DataLength) {
		pcie_device = sas_target_priv_data->pcie_dev;
		if (ioc->build_sg_scmd(ioc, scmd, smid, pcie_device)) {
			mpt3sas_base_free_smid(ioc, smid);
			_scsih_set_satl_pending(scmd, false);
			goto out;
		}
	} else
		ioc->build_zero_len_sge(ioc, &mpi_request->SGL);

	raid_device = sas_target_priv_data->raid_device;
	if (raid_device && raid_device->direct_io_enabled)
		mpt3sas_setup_direct_io(ioc, scmd,
			raid_device, mpi_request);

	if (likely(mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST)) {
		if (sas_target_priv_data->flags & MPT_TARGET_FASTPATH_IO) {
			mpi_request->IoFlags = cpu_to_le16(scmd->cmd_len |
			    MPI25_SCSIIO_IOFLAGS_FAST_PATH);
			ioc->put_smid_fast_path(ioc, smid, handle);
		} else
			ioc->put_smid_scsi_io(ioc, smid,
			    le16_to_cpu(mpi_request->DevHandle));
	} else
		ioc->put_smid_default(ioc, smid);
	return 0;

 out:
	return SCSI_MLQUEUE_HOST_BUSY;
}

/**
 * _scsih_normalize_sense - normalize descriptor and fixed format sense data
 * @sense_buffer: sense data returned by target
 * @data: normalized skey/asc/ascq
 */
static void
_scsih_normalize_sense(char *sense_buffer, struct sense_info *data)
{
	if ((sense_buffer[0] & 0x7F) >= 0x72) {
		/* descriptor format */
		data->skey = sense_buffer[1] & 0x0F;
		data->asc = sense_buffer[2];
		data->ascq = sense_buffer[3];
	} else {
		/* fixed format */
		data->skey = sense_buffer[2] & 0x0F;
		data->asc = sense_buffer[12];
		data->ascq = sense_buffer[13];
	}
}

/**
 * _scsih_scsi_ioc_info - translated non-successful SCSI_IO request
 * @ioc: per adapter object
 * @scmd: pointer to scsi command object
 * @mpi_reply: reply mf payload returned from firmware
 * @smid: ?
 *
 * scsi_status - SCSI Status code returned from target device
 * scsi_state - state info associated with SCSI_IO determined by ioc
 * ioc_status - ioc supplied status info
 */
static void
_scsih_scsi_ioc_info(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
	Mpi2SCSIIOReply_t *mpi_reply, u16 smid)
{
	u32 response_info;
	u8 *response_bytes;
	u16 ioc_status = le16_to_cpu(mpi_reply->IOCStatus) &
	    MPI2_IOCSTATUS_MASK;
	u8 scsi_state = mpi_reply->SCSIState;
	u8 scsi_status = mpi_reply->SCSIStatus;
	char *desc_ioc_state = NULL;
	char *desc_scsi_status = NULL;
	char *desc_scsi_state = ioc->tmp_string;
	u32 log_info = le32_to_cpu(mpi_reply->IOCLogInfo);
	struct _sas_device *sas_device = NULL;
	struct _pcie_device *pcie_device = NULL;
	struct scsi_target *starget = scmd->device->sdev_target;
	struct MPT3SAS_TARGET *priv_target = starget->hostdata;
	char *device_str = NULL;

	if (!priv_target)
		return;
	if (ioc->hide_ir_msg)
		device_str = "WarpDrive";
	else
		device_str = "volume";

	if (log_info == 0x31170000)
		return;

	switch (ioc_status) {
	case MPI2_IOCSTATUS_SUCCESS:
		desc_ioc_state = "success";
		break;
	case MPI2_IOCSTATUS_INVALID_FUNCTION:
		desc_ioc_state = "invalid function";
		break;
	case MPI2_IOCSTATUS_SCSI_RECOVERED_ERROR:
		desc_ioc_state = "scsi recovered error";
		break;
	case MPI2_IOCSTATUS_SCSI_INVALID_DEVHANDLE:
		desc_ioc_state = "scsi invalid dev handle";
		break;
	case MPI2_IOCSTATUS_SCSI_DEVICE_NOT_THERE:
		desc_ioc_state = "scsi device not there";
		break;
	case MPI2_IOCSTATUS_SCSI_DATA_OVERRUN:
		desc_ioc_state = "scsi data overrun";
		break;
	case MPI2_IOCSTATUS_SCSI_DATA_UNDERRUN:
		desc_ioc_state = "scsi data underrun";
		break;
	case MPI2_IOCSTATUS_SCSI_IO_DATA_ERROR:
		desc_ioc_state = "scsi io data error";
		break;
	case MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR:
		desc_ioc_state = "scsi protocol error";
		break;
	case MPI2_IOCSTATUS_SCSI_TASK_TERMINATED:
		desc_ioc_state = "scsi task terminated";
		break;
	case MPI2_IOCSTATUS_SCSI_RESIDUAL_MISMATCH:
		desc_ioc_state = "scsi residual mismatch";
		break;
	case MPI2_IOCSTATUS_SCSI_TASK_MGMT_FAILED:
		desc_ioc_state = "scsi task mgmt failed";
		break;
	case MPI2_IOCSTATUS_SCSI_IOC_TERMINATED:
		desc_ioc_state = "scsi ioc terminated";
		break;
	case MPI2_IOCSTATUS_SCSI_EXT_TERMINATED:
		desc_ioc_state = "scsi ext terminated";
		break;
	case MPI2_IOCSTATUS_EEDP_GUARD_ERROR:
		desc_ioc_state = "eedp guard error";
		break;
	case MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR:
		desc_ioc_state = "eedp ref tag error";
		break;
	case MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR:
		desc_ioc_state = "eedp app tag error";
		break;
	case MPI2_IOCSTATUS_INSUFFICIENT_POWER:
		desc_ioc_state = "insufficient power";
		break;
	default:
		desc_ioc_state = "unknown";
		break;
	}

	switch (scsi_status) {
	case MPI2_SCSI_STATUS_GOOD:
		desc_scsi_status = "good";
		break;
	case MPI2_SCSI_STATUS_CHECK_CONDITION:
		desc_scsi_status = "check condition";
		break;
	case MPI2_SCSI_STATUS_CONDITION_MET:
		desc_scsi_status = "condition met";
		break;
	case MPI2_SCSI_STATUS_BUSY:
		desc_scsi_status = "busy";
		break;
	case MPI2_SCSI_STATUS_INTERMEDIATE:
		desc_scsi_status = "intermediate";
		break;
	case MPI2_SCSI_STATUS_INTERMEDIATE_CONDMET:
		desc_scsi_status = "intermediate condmet";
		break;
	case MPI2_SCSI_STATUS_RESERVATION_CONFLICT:
		desc_scsi_status = "reservation conflict";
		break;
	case MPI2_SCSI_STATUS_COMMAND_TERMINATED:
		desc_scsi_status = "command terminated";
		break;
	case MPI2_SCSI_STATUS_TASK_SET_FULL:
		desc_scsi_status = "task set full";
		break;
	case MPI2_SCSI_STATUS_ACA_ACTIVE:
		desc_scsi_status = "aca active";
		break;
	case MPI2_SCSI_STATUS_TASK_ABORTED:
		desc_scsi_status = "task aborted";
		break;
	default:
		desc_scsi_status = "unknown";
		break;
	}

	desc_scsi_state[0] = '\0';
	if (!scsi_state)
		desc_scsi_state = " ";
	if (scsi_state & MPI2_SCSI_STATE_RESPONSE_INFO_VALID)
		strcat(desc_scsi_state, "response info ");
	if (scsi_state & MPI2_SCSI_STATE_TERMINATED)
		strcat(desc_scsi_state, "state terminated ");
	if (scsi_state & MPI2_SCSI_STATE_NO_SCSI_STATUS)
		strcat(desc_scsi_state, "no status ");
	if (scsi_state & MPI2_SCSI_STATE_AUTOSENSE_FAILED)
		strcat(desc_scsi_state, "autosense failed ");
	if (scsi_state & MPI2_SCSI_STATE_AUTOSENSE_VALID)
		strcat(desc_scsi_state, "autosense valid ");

	scsi_print_command(scmd);

	if (priv_target->flags & MPT_TARGET_FLAGS_VOLUME) {
		ioc_warn(ioc, "\t%s wwid(0x%016llx)\n",
			 device_str, (u64)priv_target->sas_address);
	} else if (priv_target->flags & MPT_TARGET_FLAGS_PCIE_DEVICE) {
		pcie_device = mpt3sas_get_pdev_from_target(ioc, priv_target);
		if (pcie_device) {
			ioc_info(ioc, "\twwid(0x%016llx), port(%d)\n",
				 (u64)pcie_device->wwid, pcie_device->port_num);
			if (pcie_device->enclosure_handle != 0)
				ioc_info(ioc, "\tenclosure logical id(0x%016llx), slot(%d)\n",
					 (u64)pcie_device->enclosure_logical_id,
					 pcie_device->slot);
			if (pcie_device->connector_name[0])
				ioc_info(ioc, "\tenclosure level(0x%04x), connector name( %s)\n",
					 pcie_device->enclosure_level,
					 pcie_device->connector_name);
			pcie_device_put(pcie_device);
		}
	} else {
		sas_device = mpt3sas_get_sdev_from_target(ioc, priv_target);
		if (sas_device) {
			ioc_warn(ioc, "\tsas_address(0x%016llx), phy(%d)\n",
				 (u64)sas_device->sas_address, sas_device->phy);

			_scsih_display_enclosure_chassis_info(ioc, sas_device,
			    NULL, NULL);

			sas_device_put(sas_device);
		}
	}

	ioc_warn(ioc, "\thandle(0x%04x), ioc_status(%s)(0x%04x), smid(%d)\n",
		 le16_to_cpu(mpi_reply->DevHandle),
		 desc_ioc_state, ioc_status, smid);
	ioc_warn(ioc, "\trequest_len(%d), underflow(%d), resid(%d)\n",
		 scsi_bufflen(scmd), scmd->underflow, scsi_get_resid(scmd));
	ioc_warn(ioc, "\ttag(%d), transfer_count(%d), sc->result(0x%08x)\n",
		 le16_to_cpu(mpi_reply->TaskTag),
		 le32_to_cpu(mpi_reply->TransferCount), scmd->result);
	ioc_warn(ioc, "\tscsi_status(%s)(0x%02x), scsi_state(%s)(0x%02x)\n",
		 desc_scsi_status, scsi_status, desc_scsi_state, scsi_state);

	if (scsi_state & MPI2_SCSI_STATE_AUTOSENSE_VALID) {
		struct sense_info data;
		_scsih_normalize_sense(scmd->sense_buffer, &data);
		ioc_warn(ioc, "\t[sense_key,asc,ascq]: [0x%02x,0x%02x,0x%02x], count(%d)\n",
			 data.skey, data.asc, data.ascq,
			 le32_to_cpu(mpi_reply->SenseCount));
	}
	if (scsi_state & MPI2_SCSI_STATE_RESPONSE_INFO_VALID) {
		response_info = le32_to_cpu(mpi_reply->ResponseInfo);
		response_bytes = (u8 *)&response_info;
		_scsih_response_code(ioc, response_bytes[0]);
	}
}

/**
 * _scsih_turn_on_pfa_led - illuminate PFA LED
 * @ioc: per adapter object
 * @handle: device handle
 * Context: process
 */
static void
_scsih_turn_on_pfa_led(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	Mpi2SepReply_t mpi_reply;
	Mpi2SepRequest_t mpi_request;
	struct _sas_device *sas_device;

	sas_device = mpt3sas_get_sdev_by_handle(ioc, handle);
	if (!sas_device)
		return;

	memset(&mpi_request, 0, sizeof(Mpi2SepRequest_t));
	mpi_request.Function = MPI2_FUNCTION_SCSI_ENCLOSURE_PROCESSOR;
	mpi_request.Action = MPI2_SEP_REQ_ACTION_WRITE_STATUS;
	mpi_request.SlotStatus =
	    cpu_to_le32(MPI2_SEP_REQ_SLOTSTATUS_PREDICTED_FAULT);
	mpi_request.DevHandle = cpu_to_le16(handle);
	mpi_request.Flags = MPI2_SEP_REQ_FLAGS_DEVHANDLE_ADDRESS;
	if ((mpt3sas_base_scsi_enclosure_processor(ioc, &mpi_reply,
	    &mpi_request)) != 0) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		goto out;
	}
	sas_device->pfa_led_on = 1;

	if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo) {
		dewtprintk(ioc,
			   ioc_info(ioc, "enclosure_processor: ioc_status (0x%04x), loginfo(0x%08x)\n",
				    le16_to_cpu(mpi_reply.IOCStatus),
				    le32_to_cpu(mpi_reply.IOCLogInfo)));
		goto out;
	}
out:
	sas_device_put(sas_device);
}

/**
 * _scsih_turn_off_pfa_led - turn off Fault LED
 * @ioc: per adapter object
 * @sas_device: sas device whose PFA LED has to turned off
 * Context: process
 */
static void
_scsih_turn_off_pfa_led(struct MPT3SAS_ADAPTER *ioc,
	struct _sas_device *sas_device)
{
	Mpi2SepReply_t mpi_reply;
	Mpi2SepRequest_t mpi_request;

	memset(&mpi_request, 0, sizeof(Mpi2SepRequest_t));
	mpi_request.Function = MPI2_FUNCTION_SCSI_ENCLOSURE_PROCESSOR;
	mpi_request.Action = MPI2_SEP_REQ_ACTION_WRITE_STATUS;
	mpi_request.SlotStatus = 0;
	mpi_request.Slot = cpu_to_le16(sas_device->slot);
	mpi_request.DevHandle = 0;
	mpi_request.EnclosureHandle = cpu_to_le16(sas_device->enclosure_handle);
	mpi_request.Flags = MPI2_SEP_REQ_FLAGS_ENCLOSURE_SLOT_ADDRESS;
	if ((mpt3sas_base_scsi_enclosure_processor(ioc, &mpi_reply,
		&mpi_request)) != 0) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return;
	}

	if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo) {
		dewtprintk(ioc,
			   ioc_info(ioc, "enclosure_processor: ioc_status (0x%04x), loginfo(0x%08x)\n",
				    le16_to_cpu(mpi_reply.IOCStatus),
				    le32_to_cpu(mpi_reply.IOCLogInfo)));
		return;
	}
}

/**
 * _scsih_send_event_to_turn_on_pfa_led - fire delayed event
 * @ioc: per adapter object
 * @handle: device handle
 * Context: interrupt.
 */
static void
_scsih_send_event_to_turn_on_pfa_led(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct fw_event_work *fw_event;

	fw_event = alloc_fw_event_work(0);
	if (!fw_event)
		return;
	fw_event->event = MPT3SAS_TURN_ON_PFA_LED;
	fw_event->device_handle = handle;
	fw_event->ioc = ioc;
	_scsih_fw_event_add(ioc, fw_event);
	fw_event_work_put(fw_event);
}

/**
 * _scsih_smart_predicted_fault - process smart errors
 * @ioc: per adapter object
 * @handle: device handle
 * Context: interrupt.
 */
static void
_scsih_smart_predicted_fault(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct scsi_target *starget;
	struct MPT3SAS_TARGET *sas_target_priv_data;
	Mpi2EventNotificationReply_t *event_reply;
	Mpi2EventDataSasDeviceStatusChange_t *event_data;
	struct _sas_device *sas_device;
	ssize_t sz;
	unsigned long flags;

	/* only handle non-raid devices */
	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_device = __mpt3sas_get_sdev_by_handle(ioc, handle);
	if (!sas_device)
		goto out_unlock;

	starget = sas_device->starget;
	sas_target_priv_data = starget->hostdata;

	if ((sas_target_priv_data->flags & MPT_TARGET_FLAGS_RAID_COMPONENT) ||
	   ((sas_target_priv_data->flags & MPT_TARGET_FLAGS_VOLUME)))
		goto out_unlock;

	_scsih_display_enclosure_chassis_info(NULL, sas_device, NULL, starget);

	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);

	if (ioc->pdev->subsystem_vendor == PCI_VENDOR_ID_IBM)
		_scsih_send_event_to_turn_on_pfa_led(ioc, handle);

	/* insert into event log */
	sz = offsetof(Mpi2EventNotificationReply_t, EventData) +
	     sizeof(Mpi2EventDataSasDeviceStatusChange_t);
	event_reply = kzalloc(sz, GFP_ATOMIC);
	if (!event_reply) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		goto out;
	}

	event_reply->Function = MPI2_FUNCTION_EVENT_NOTIFICATION;
	event_reply->Event =
	    cpu_to_le16(MPI2_EVENT_SAS_DEVICE_STATUS_CHANGE);
	event_reply->MsgLength = sz/4;
	event_reply->EventDataLength =
	    cpu_to_le16(sizeof(Mpi2EventDataSasDeviceStatusChange_t)/4);
	event_data = (Mpi2EventDataSasDeviceStatusChange_t *)
	    event_reply->EventData;
	event_data->ReasonCode = MPI2_EVENT_SAS_DEV_STAT_RC_SMART_DATA;
	event_data->ASC = 0x5D;
	event_data->DevHandle = cpu_to_le16(handle);
	event_data->SASAddress = cpu_to_le64(sas_target_priv_data->sas_address);
	mpt3sas_ctl_add_to_event_log(ioc, event_reply);
	kfree(event_reply);
out:
	if (sas_device)
		sas_device_put(sas_device);
	return;

out_unlock:
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
	goto out;
}

/**
 * _scsih_io_done - scsi request callback
 * @ioc: per adapter object
 * @smid: system request message index
 * @msix_index: MSIX table index supplied by the OS
 * @reply: reply message frame(lower 32bit addr)
 *
 * Callback handler when using _scsih_qcmd.
 *
 * Return: 1 meaning mf should be freed from _base_interrupt
 *         0 means the mf is freed from this function.
 */
static u8
_scsih_io_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
{
	Mpi25SCSIIORequest_t *mpi_request;
	Mpi2SCSIIOReply_t *mpi_reply;
	struct scsi_cmnd *scmd;
	struct scsiio_tracker *st;
	u16 ioc_status;
	u32 xfer_cnt;
	u8 scsi_state;
	u8 scsi_status;
	u32 log_info;
	struct MPT3SAS_DEVICE *sas_device_priv_data;
	u32 response_code = 0;

	mpi_reply = mpt3sas_base_get_reply_virt_addr(ioc, reply);

	scmd = mpt3sas_scsih_scsi_lookup_get(ioc, smid);
	if (scmd == NULL)
		return 1;

	_scsih_set_satl_pending(scmd, false);

	mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);

	if (mpi_reply == NULL) {
		scmd->result = DID_OK << 16;
		goto out;
	}

	sas_device_priv_data = scmd->device->hostdata;
	if (!sas_device_priv_data || !sas_device_priv_data->sas_target ||
	     sas_device_priv_data->sas_target->deleted) {
		scmd->result = DID_NO_CONNECT << 16;
		goto out;
	}
	ioc_status = le16_to_cpu(mpi_reply->IOCStatus);

	/*
	 * WARPDRIVE: If direct_io is set then it is directIO,
	 * the failed direct I/O should be redirected to volume
	 */
	st = scsi_cmd_priv(scmd);
	if (st->direct_io &&
	     ((ioc_status & MPI2_IOCSTATUS_MASK)
	      != MPI2_IOCSTATUS_SCSI_TASK_TERMINATED)) {
		st->direct_io = 0;
		st->scmd = scmd;
		memcpy(mpi_request->CDB.CDB32, scmd->cmnd, scmd->cmd_len);
		mpi_request->DevHandle =
		    cpu_to_le16(sas_device_priv_data->sas_target->handle);
		ioc->put_smid_scsi_io(ioc, smid,
		    sas_device_priv_data->sas_target->handle);
		return 0;
	}
	/* turning off TLR */
	scsi_state = mpi_reply->SCSIState;
	if (scsi_state & MPI2_SCSI_STATE_RESPONSE_INFO_VALID)
		response_code =
		    le32_to_cpu(mpi_reply->ResponseInfo) & 0xFF;
	if (!sas_device_priv_data->tlr_snoop_check) {
		sas_device_priv_data->tlr_snoop_check++;
		if ((!ioc->is_warpdrive &&
		    !scsih_is_raid(&scmd->device->sdev_gendev) &&
		    !scsih_is_nvme(&scmd->device->sdev_gendev))
		    && sas_is_tlr_enabled(scmd->device) &&
		    response_code == MPI2_SCSITASKMGMT_RSP_INVALID_FRAME) {
			sas_disable_tlr(scmd->device);
			sdev_printk(KERN_INFO, scmd->device, "TLR disabled\n");
		}
	}

	xfer_cnt = le32_to_cpu(mpi_reply->TransferCount);
	scsi_set_resid(scmd, scsi_bufflen(scmd) - xfer_cnt);
	if (ioc_status & MPI2_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE)
		log_info =  le32_to_cpu(mpi_reply->IOCLogInfo);
	else
		log_info = 0;
	ioc_status &= MPI2_IOCSTATUS_MASK;
	scsi_status = mpi_reply->SCSIStatus;

	if (ioc_status == MPI2_IOCSTATUS_SCSI_DATA_UNDERRUN && xfer_cnt == 0 &&
	    (scsi_status == MPI2_SCSI_STATUS_BUSY ||
	     scsi_status == MPI2_SCSI_STATUS_RESERVATION_CONFLICT ||
	     scsi_status == MPI2_SCSI_STATUS_TASK_SET_FULL)) {
		ioc_status = MPI2_IOCSTATUS_SUCCESS;
	}

	if (scsi_state & MPI2_SCSI_STATE_AUTOSENSE_VALID) {
		struct sense_info data;
		const void *sense_data = mpt3sas_base_get_sense_buffer(ioc,
		    smid);
		u32 sz = min_t(u32, SCSI_SENSE_BUFFERSIZE,
		    le32_to_cpu(mpi_reply->SenseCount));
		memcpy(scmd->sense_buffer, sense_data, sz);
		_scsih_normalize_sense(scmd->sense_buffer, &data);
		/* failure prediction threshold exceeded */
		if (data.asc == 0x5D)
			_scsih_smart_predicted_fault(ioc,
			    le16_to_cpu(mpi_reply->DevHandle));
		mpt3sas_trigger_scsi(ioc, data.skey, data.asc, data.ascq);

		if ((ioc->logging_level & MPT_DEBUG_REPLY) &&
		     ((scmd->sense_buffer[2] == UNIT_ATTENTION) ||
		     (scmd->sense_buffer[2] == MEDIUM_ERROR) ||
		     (scmd->sense_buffer[2] == HARDWARE_ERROR)))
			_scsih_scsi_ioc_info(ioc, scmd, mpi_reply, smid);
	}
	switch (ioc_status) {
	case MPI2_IOCSTATUS_BUSY:
	case MPI2_IOCSTATUS_INSUFFICIENT_RESOURCES:
		scmd->result = SAM_STAT_BUSY;
		break;

	case MPI2_IOCSTATUS_SCSI_DEVICE_NOT_THERE:
		scmd->result = DID_NO_CONNECT << 16;
		break;

	case MPI2_IOCSTATUS_SCSI_IOC_TERMINATED:
		if (sas_device_priv_data->block) {
			scmd->result = DID_TRANSPORT_DISRUPTED << 16;
			goto out;
		}
		if (log_info == 0x31110630) {
			if (scmd->retries > 2) {
				scmd->result = DID_NO_CONNECT << 16;
				scsi_device_set_state(scmd->device,
				    SDEV_OFFLINE);
			} else {
				scmd->result = DID_SOFT_ERROR << 16;
				scmd->device->expecting_cc_ua = 1;
			}
			break;
		} else if (log_info == VIRTUAL_IO_FAILED_RETRY) {
			scmd->result = DID_RESET << 16;
			break;
		} else if ((scmd->device->channel == RAID_CHANNEL) &&
		   (scsi_state == (MPI2_SCSI_STATE_TERMINATED |
		   MPI2_SCSI_STATE_NO_SCSI_STATUS))) {
			scmd->result = DID_RESET << 16;
			break;
		}
		scmd->result = DID_SOFT_ERROR << 16;
		break;
	case MPI2_IOCSTATUS_SCSI_TASK_TERMINATED:
	case MPI2_IOCSTATUS_SCSI_EXT_TERMINATED:
		scmd->result = DID_RESET << 16;
		break;

	case MPI2_IOCSTATUS_SCSI_RESIDUAL_MISMATCH:
		if ((xfer_cnt == 0) || (scmd->underflow > xfer_cnt))
			scmd->result = DID_SOFT_ERROR << 16;
		else
			scmd->result = (DID_OK << 16) | scsi_status;
		break;

	case MPI2_IOCSTATUS_SCSI_DATA_UNDERRUN:
		scmd->result = (DID_OK << 16) | scsi_status;

		if ((scsi_state & MPI2_SCSI_STATE_AUTOSENSE_VALID))
			break;

		if (xfer_cnt < scmd->underflow) {
			if (scsi_status == SAM_STAT_BUSY)
				scmd->result = SAM_STAT_BUSY;
			else
				scmd->result = DID_SOFT_ERROR << 16;
		} else if (scsi_state & (MPI2_SCSI_STATE_AUTOSENSE_FAILED |
		     MPI2_SCSI_STATE_NO_SCSI_STATUS))
			scmd->result = DID_SOFT_ERROR << 16;
		else if (scsi_state & MPI2_SCSI_STATE_TERMINATED)
			scmd->result = DID_RESET << 16;
		else if (!xfer_cnt && scmd->cmnd[0] == REPORT_LUNS) {
			mpi_reply->SCSIState = MPI2_SCSI_STATE_AUTOSENSE_VALID;
			mpi_reply->SCSIStatus = SAM_STAT_CHECK_CONDITION;
			scsi_build_sense(scmd, 0, ILLEGAL_REQUEST,
					 0x20, 0);
		}
		break;

	case MPI2_IOCSTATUS_SCSI_DATA_OVERRUN:
		scsi_set_resid(scmd, 0);
		fallthrough;
	case MPI2_IOCSTATUS_SCSI_RECOVERED_ERROR:
	case MPI2_IOCSTATUS_SUCCESS:
		scmd->result = (DID_OK << 16) | scsi_status;
		if (response_code ==
		    MPI2_SCSITASKMGMT_RSP_INVALID_FRAME ||
		    (scsi_state & (MPI2_SCSI_STATE_AUTOSENSE_FAILED |
		     MPI2_SCSI_STATE_NO_SCSI_STATUS)))
			scmd->result = DID_SOFT_ERROR << 16;
		else if (scsi_state & MPI2_SCSI_STATE_TERMINATED)
			scmd->result = DID_RESET << 16;
		break;

	case MPI2_IOCSTATUS_EEDP_GUARD_ERROR:
	case MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR:
	case MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR:
		_scsih_eedp_error_handling(scmd, ioc_status);
		break;

	case MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR:
	case MPI2_IOCSTATUS_INVALID_FUNCTION:
	case MPI2_IOCSTATUS_INVALID_SGL:
	case MPI2_IOCSTATUS_INTERNAL_ERROR:
	case MPI2_IOCSTATUS_INVALID_FIELD:
	case MPI2_IOCSTATUS_INVALID_STATE:
	case MPI2_IOCSTATUS_SCSI_IO_DATA_ERROR:
	case MPI2_IOCSTATUS_SCSI_TASK_MGMT_FAILED:
	case MPI2_IOCSTATUS_INSUFFICIENT_POWER:
	default:
		scmd->result = DID_SOFT_ERROR << 16;
		break;

	}

	if (scmd->result && (ioc->logging_level & MPT_DEBUG_REPLY))
		_scsih_scsi_ioc_info(ioc , scmd, mpi_reply, smid);

 out:

	scsi_dma_unmap(scmd);
	mpt3sas_base_free_smid(ioc, smid);
	scsi_done(scmd);
	return 0;
}

/**
 * _scsih_update_vphys_after_reset - update the Port's
 *			vphys_list after reset
 * @ioc: per adapter object
 *
 * Returns nothing.
 */
static void
_scsih_update_vphys_after_reset(struct MPT3SAS_ADAPTER *ioc)
{
	u16 sz, ioc_status;
	int i;
	Mpi2ConfigReply_t mpi_reply;
	Mpi2SasIOUnitPage0_t *sas_iounit_pg0 = NULL;
	u16 attached_handle;
	u64 attached_sas_addr;
	u8 found = 0, port_id;
	Mpi2SasPhyPage0_t phy_pg0;
	struct hba_port *port, *port_next, *mport;
	struct virtual_phy *vphy, *vphy_next;
	struct _sas_device *sas_device;

	/*
	 * Mark all the vphys objects as dirty.
	 */
	list_for_each_entry_safe(port, port_next,
	    &ioc->port_table_list, list) {
		if (!port->vphys_mask)
			continue;
		list_for_each_entry_safe(vphy, vphy_next,
		    &port->vphys_list, list) {
			vphy->flags |= MPT_VPHY_FLAG_DIRTY_PHY;
		}
	}

	/*
	 * Read SASIOUnitPage0 to get each HBA Phy's data.
	 */
	sz = offsetof(Mpi2SasIOUnitPage0_t, PhyData) +
	    (ioc->sas_hba.num_phys * sizeof(Mpi2SasIOUnit0PhyData_t));
	sas_iounit_pg0 = kzalloc(sz, GFP_KERNEL);
	if (!sas_iounit_pg0) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
		    __FILE__, __LINE__, __func__);
		return;
	}
	if ((mpt3sas_config_get_sas_iounit_pg0(ioc, &mpi_reply,
	    sas_iounit_pg0, sz)) != 0)
		goto out;
	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
	if (ioc_status != MPI2_IOCSTATUS_SUCCESS)
		goto out;
	/*
	 * Loop over each HBA Phy.
	 */
	for (i = 0; i < ioc->sas_hba.num_phys; i++) {
		/*
		 * Check whether Phy's Negotiation Link Rate is > 1.5G or not.
		 */
		if ((sas_iounit_pg0->PhyData[i].NegotiatedLinkRate >> 4) <
		    MPI2_SAS_NEG_LINK_RATE_1_5)
			continue;
		/*
		 * Check whether Phy is connected to SEP device or not,
		 * if it is SEP device then read the Phy's SASPHYPage0 data to
		 * determine whether Phy is a virtual Phy or not. if it is
		 * virtual phy then it is conformed that the attached remote
		 * device is a HBA's vSES device.
		 */
		if (!(le32_to_cpu(
		    sas_iounit_pg0->PhyData[i].ControllerPhyDeviceInfo) &
		    MPI2_SAS_DEVICE_INFO_SEP))
			continue;

		if ((mpt3sas_config_get_phy_pg0(ioc, &mpi_reply, &phy_pg0,
		    i))) {
			ioc_err(ioc, "failure at %s:%d/%s()!\n",
			    __FILE__, __LINE__, __func__);
			continue;
		}

		if (!(le32_to_cpu(phy_pg0.PhyInfo) &
		    MPI2_SAS_PHYINFO_VIRTUAL_PHY))
			continue;
		/*
		 * Get the vSES device's SAS Address.
		 */
		attached_handle = le16_to_cpu(
		    sas_iounit_pg0->PhyData[i].AttachedDevHandle);
		if (_scsih_get_sas_address(ioc, attached_handle,
		    &attached_sas_addr) != 0) {
			ioc_err(ioc, "failure at %s:%d/%s()!\n",
			    __FILE__, __LINE__, __func__);
			continue;
		}

		found = 0;
		port = port_next = NULL;
		/*
		 * Loop over each virtual_phy object from
		 * each port's vphys_list.
		 */
		list_for_each_entry_safe(port,
		    port_next, &ioc->port_table_list, list) {
			if (!port->vphys_mask)
				continue;
			list_for_each_entry_safe(vphy, vphy_next,
			    &port->vphys_list, list) {
				/*
				 * Continue with next virtual_phy object
				 * if the object is not marked as dirty.
				 */
				if (!(vphy->flags & MPT_VPHY_FLAG_DIRTY_PHY))
					continue;

				/*
				 * Continue with next virtual_phy object
				 * if the object's SAS Address is not equals
				 * to current Phy's vSES device SAS Address.
				 */
				if (vphy->sas_address != attached_sas_addr)
					continue;
				/*
				 * Enable current Phy number bit in object's
				 * phy_mask field.
				 */
				if (!(vphy->phy_mask & (1 << i)))
					vphy->phy_mask = (1 << i);
				/*
				 * Get hba_port object from hba_port table
				 * corresponding to current phy's Port ID.
				 * if there is no hba_port object corresponding
				 * to Phy's Port ID then create a new hba_port
				 * object & add to hba_port table.
				 */
				port_id = sas_iounit_pg0->PhyData[i].Port;
				mport = mpt3sas_get_port_by_id(ioc, port_id, 1);
				if (!mport) {
					mport = kzalloc(
					    sizeof(struct hba_port), GFP_KERNEL);
					if (!mport)
						break;
					mport->port_id = port_id;
					ioc_info(ioc,
					    "%s: hba_port entry: %p, port: %d is added to hba_port list\n",
					    __func__, mport, mport->port_id);
					list_add_tail(&mport->list,
						&ioc->port_table_list);
				}
				/*
				 * If mport & port pointers are not pointing to
				 * same hba_port object then it means that vSES
				 * device's Port ID got changed after reset and
				 * hence move current virtual_phy object from
				 * port's vphys_list to mport's vphys_list.
				 */
				if (port != mport) {
					if (!mport->vphys_mask)
						INIT_LIST_HEAD(
						    &mport->vphys_list);
					mport->vphys_mask |= (1 << i);
					port->vphys_mask &= ~(1 << i);
					list_move(&vphy->list,
					    &mport->vphys_list);
					sas_device = mpt3sas_get_sdev_by_addr(
					    ioc, attached_sas_addr, port);
					if (sas_device)
						sas_device->port = mport;
				}
				/*
				 * Earlier while updating the hba_port table,
				 * it is determined that there is no other
				 * direct attached device with mport's Port ID,
				 * Hence mport was marked as dirty. Only vSES
				 * device has this Port ID, so unmark the mport
				 * as dirt.
				 */
				if (mport->flags & HBA_PORT_FLAG_DIRTY_PORT) {
					mport->sas_address = 0;
					mport->phy_mask = 0;
					mport->flags &=
					    ~HBA_PORT_FLAG_DIRTY_PORT;
				}
				/*
				 * Unmark current virtual_phy object as dirty.
				 */
				vphy->flags &= ~MPT_VPHY_FLAG_DIRTY_PHY;
				found = 1;
				break;
			}
			if (found)
				break;
		}
	}
out:
	kfree(sas_iounit_pg0);
}

/**
 * _scsih_get_port_table_after_reset - Construct temporary port table
 * @ioc: per adapter object
 * @port_table: address where port table needs to be constructed
 *
 * return number of HBA port entries available after reset.
 */
static int
_scsih_get_port_table_after_reset(struct MPT3SAS_ADAPTER *ioc,
	struct hba_port *port_table)
{
	u16 sz, ioc_status;
	int i, j;
	Mpi2ConfigReply_t mpi_reply;
	Mpi2SasIOUnitPage0_t *sas_iounit_pg0 = NULL;
	u16 attached_handle;
	u64 attached_sas_addr;
	u8 found = 0, port_count = 0, port_id;

	sz = offsetof(Mpi2SasIOUnitPage0_t, PhyData) + (ioc->sas_hba.num_phys
	    * sizeof(Mpi2SasIOUnit0PhyData_t));
	sas_iounit_pg0 = kzalloc(sz, GFP_KERNEL);
	if (!sas_iounit_pg0) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
		    __FILE__, __LINE__, __func__);
		return port_count;
	}

	if ((mpt3sas_config_get_sas_iounit_pg0(ioc, &mpi_reply,
	    sas_iounit_pg0, sz)) != 0)
		goto out;
	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
	if (ioc_status != MPI2_IOCSTATUS_SUCCESS)
		goto out;
	for (i = 0; i < ioc->sas_hba.num_phys; i++) {
		found = 0;
		if ((sas_iounit_pg0->PhyData[i].NegotiatedLinkRate >> 4) <
		    MPI2_SAS_NEG_LINK_RATE_1_5)
			continue;
		attached_handle =
		    le16_to_cpu(sas_iounit_pg0->PhyData[i].AttachedDevHandle);
		if (_scsih_get_sas_address(
		    ioc, attached_handle, &attached_sas_addr) != 0) {
			ioc_err(ioc, "failure at %s:%d/%s()!\n",
			    __FILE__, __LINE__, __func__);
			continue;
		}

		for (j = 0; j < port_count; j++) {
			port_id = sas_iounit_pg0->PhyData[i].Port;
			if (port_table[j].port_id == port_id &&
			    port_table[j].sas_address == attached_sas_addr) {
				port_table[j].phy_mask |= (1 << i);
				found = 1;
				break;
			}
		}

		if (found)
			continue;

		port_id = sas_iounit_pg0->PhyData[i].Port;
		port_table[port_count].port_id = port_id;
		port_table[port_count].phy_mask = (1 << i);
		port_table[port_count].sas_address = attached_sas_addr;
		port_count++;
	}
out:
	kfree(sas_iounit_pg0);
	return port_count;
}

enum hba_port_matched_codes {
	NOT_MATCHED = 0,
	MATCHED_WITH_ADDR_AND_PHYMASK,
	MATCHED_WITH_ADDR_SUBPHYMASK_AND_PORT,
	MATCHED_WITH_ADDR_AND_SUBPHYMASK,
	MATCHED_WITH_ADDR,
};

/**
 * _scsih_look_and_get_matched_port_entry - Get matched hba port entry
 *					from HBA port table
 * @ioc: per adapter object
 * @port_entry: hba port entry from temporary port table which needs to be
 *		searched for matched entry in the HBA port table
 * @matched_port_entry: save matched hba port entry here
 * @count: count of matched entries
 *
 * return type of matched entry found.
 */
static enum hba_port_matched_codes
_scsih_look_and_get_matched_port_entry(struct MPT3SAS_ADAPTER *ioc,
	struct hba_port *port_entry,
	struct hba_port **matched_port_entry, int *count)
{
	struct hba_port *port_table_entry, *matched_port = NULL;
	enum hba_port_matched_codes matched_code = NOT_MATCHED;
	int lcount = 0;
	*matched_port_entry = NULL;

	list_for_each_entry(port_table_entry, &ioc->port_table_list, list) {
		if (!(port_table_entry->flags & HBA_PORT_FLAG_DIRTY_PORT))
			continue;

		if ((port_table_entry->sas_address == port_entry->sas_address)
		    && (port_table_entry->phy_mask == port_entry->phy_mask)) {
			matched_code = MATCHED_WITH_ADDR_AND_PHYMASK;
			matched_port = port_table_entry;
			break;
		}

		if ((port_table_entry->sas_address == port_entry->sas_address)
		    && (port_table_entry->phy_mask & port_entry->phy_mask)
		    && (port_table_entry->port_id == port_entry->port_id)) {
			matched_code = MATCHED_WITH_ADDR_SUBPHYMASK_AND_PORT;
			matched_port = port_table_entry;
			continue;
		}

		if ((port_table_entry->sas_address == port_entry->sas_address)
		    && (port_table_entry->phy_mask & port_entry->phy_mask)) {
			if (matched_code ==
			    MATCHED_WITH_ADDR_SUBPHYMASK_AND_PORT)
				continue;
			matched_code = MATCHED_WITH_ADDR_AND_SUBPHYMASK;
			matched_port = port_table_entry;
			continue;
		}

		if (port_table_entry->sas_address == port_entry->sas_address) {
			if (matched_code ==
			    MATCHED_WITH_ADDR_SUBPHYMASK_AND_PORT)
				continue;
			if (matched_code == MATCHED_WITH_ADDR_AND_SUBPHYMASK)
				continue;
			matched_code = MATCHED_WITH_ADDR;
			matched_port = port_table_entry;
			lcount++;
		}
	}

	*matched_port_entry = matched_port;
	if (matched_code ==  MATCHED_WITH_ADDR)
		*count = lcount;
	return matched_code;
}

/**
 * _scsih_del_phy_part_of_anther_port - remove phy if it
 *				is a part of anther port
 *@ioc: per adapter object
 *@port_table: port table after reset
 *@index: hba port entry index
 *@port_count: number of ports available after host reset
 *@offset: HBA phy bit offset
 *
 */
static void
_scsih_del_phy_part_of_anther_port(struct MPT3SAS_ADAPTER *ioc,
	struct hba_port *port_table,
	int index, u8 port_count, int offset)
{
	struct _sas_node *sas_node = &ioc->sas_hba;
	u32 i, found = 0;

	for (i = 0; i < port_count; i++) {
		if (i == index)
			continue;

		if (port_table[i].phy_mask & (1 << offset)) {
			mpt3sas_transport_del_phy_from_an_existing_port(
			    ioc, sas_node, &sas_node->phy[offset]);
			found = 1;
			break;
		}
	}
	if (!found)
		port_table[index].phy_mask |= (1 << offset);
}

/**
 * _scsih_add_or_del_phys_from_existing_port - add/remove phy to/from
 *						right port
 *@ioc: per adapter object
 *@hba_port_entry: hba port table entry
 *@port_table: temporary port table
 *@index: hba port entry index
 *@port_count: number of ports available after host reset
 *
 */
static void
_scsih_add_or_del_phys_from_existing_port(struct MPT3SAS_ADAPTER *ioc,
	struct hba_port *hba_port_entry, struct hba_port *port_table,
	int index, int port_count)
{
	u32 phy_mask, offset = 0;
	struct _sas_node *sas_node = &ioc->sas_hba;

	phy_mask = hba_port_entry->phy_mask ^ port_table[index].phy_mask;

	for (offset = 0; offset < ioc->sas_hba.num_phys; offset++) {
		if (phy_mask & (1 << offset)) {
			if (!(port_table[index].phy_mask & (1 << offset))) {
				_scsih_del_phy_part_of_anther_port(
				    ioc, port_table, index, port_count,
				    offset);
				continue;
			}
			if (sas_node->phy[offset].phy_belongs_to_port)
				mpt3sas_transport_del_phy_from_an_existing_port(
				    ioc, sas_node, &sas_node->phy[offset]);
			mpt3sas_transport_add_phy_to_an_existing_port(
			    ioc, sas_node, &sas_node->phy[offset],
			    hba_port_entry->sas_address,
			    hba_port_entry);
		}
	}
}

/**
 * _scsih_del_dirty_vphy - delete virtual_phy objects marked as dirty.
 * @ioc: per adapter object
 *
 * Returns nothing.
 */
static void
_scsih_del_dirty_vphy(struct MPT3SAS_ADAPTER *ioc)
{
	struct hba_port *port, *port_next;
	struct virtual_phy *vphy, *vphy_next;

	list_for_each_entry_safe(port, port_next,
	    &ioc->port_table_list, list) {
		if (!port->vphys_mask)
			continue;
		list_for_each_entry_safe(vphy, vphy_next,
		    &port->vphys_list, list) {
			if (vphy->flags & MPT_VPHY_FLAG_DIRTY_PHY) {
				drsprintk(ioc, ioc_info(ioc,
				    "Deleting vphy %p entry from port id: %d\t, Phy_mask 0x%08x\n",
				    vphy, port->port_id,
				    vphy->phy_mask));
				port->vphys_mask &= ~vphy->phy_mask;
				list_del(&vphy->list);
				kfree(vphy);
			}
		}
		if (!port->vphys_mask && !port->sas_address)
			port->flags |= HBA_PORT_FLAG_DIRTY_PORT;
	}
}

/**
 * _scsih_del_dirty_port_entries - delete dirty port entries from port list
 *					after host reset
 *@ioc: per adapter object
 *
 */
static void
_scsih_del_dirty_port_entries(struct MPT3SAS_ADAPTER *ioc)
{
	struct hba_port *port, *port_next;

	list_for_each_entry_safe(port, port_next,
	    &ioc->port_table_list, list) {
		if (!(port->flags & HBA_PORT_FLAG_DIRTY_PORT) ||
		    port->flags & HBA_PORT_FLAG_NEW_PORT)
			continue;

		drsprintk(ioc, ioc_info(ioc,
		    "Deleting port table entry %p having Port: %d\t Phy_mask 0x%08x\n",
		    port, port->port_id, port->phy_mask));
		list_del(&port->list);
		kfree(port);
	}
}

/**
 * _scsih_sas_port_refresh - Update HBA port table after host reset
 * @ioc: per adapter object
 */
static void
_scsih_sas_port_refresh(struct MPT3SAS_ADAPTER *ioc)
{
	u32 port_count = 0;
	struct hba_port *port_table;
	struct hba_port *port_table_entry;
	struct hba_port *port_entry = NULL;
	int i, j, count = 0, lcount = 0;
	int ret;
	u64 sas_addr;
	u8 num_phys;

	drsprintk(ioc, ioc_info(ioc,
	    "updating ports for sas_host(0x%016llx)\n",
	    (unsigned long long)ioc->sas_hba.sas_address));

	mpt3sas_config_get_number_hba_phys(ioc, &num_phys);
	if (!num_phys) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
		    __FILE__, __LINE__, __func__);
		return;
	}

	if (num_phys > ioc->sas_hba.nr_phys_allocated) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
		   __FILE__, __LINE__, __func__);
		return;
	}
	ioc->sas_hba.num_phys = num_phys;

	port_table = kcalloc(ioc->sas_hba.num_phys,
	    sizeof(struct hba_port), GFP_KERNEL);
	if (!port_table)
		return;

	port_count = _scsih_get_port_table_after_reset(ioc, port_table);
	if (!port_count)
		return;

	drsprintk(ioc, ioc_info(ioc, "New Port table\n"));
	for (j = 0; j < port_count; j++)
		drsprintk(ioc, ioc_info(ioc,
		    "Port: %d\t Phy_mask 0x%08x\t sas_addr(0x%016llx)\n",
		    port_table[j].port_id,
		    port_table[j].phy_mask, port_table[j].sas_address));

	list_for_each_entry(port_table_entry, &ioc->port_table_list, list)
		port_table_entry->flags |= HBA_PORT_FLAG_DIRTY_PORT;

	drsprintk(ioc, ioc_info(ioc, "Old Port table\n"));
	port_table_entry = NULL;
	list_for_each_entry(port_table_entry, &ioc->port_table_list, list) {
		drsprintk(ioc, ioc_info(ioc,
		    "Port: %d\t Phy_mask 0x%08x\t sas_addr(0x%016llx)\n",
		    port_table_entry->port_id,
		    port_table_entry->phy_mask,
		    port_table_entry->sas_address));
	}

	for (j = 0; j < port_count; j++) {
		ret = _scsih_look_and_get_matched_port_entry(ioc,
		    &port_table[j], &port_entry, &count);
		if (!port_entry) {
			drsprintk(ioc, ioc_info(ioc,
			    "No Matched entry for sas_addr(0x%16llx), Port:%d\n",
			    port_table[j].sas_address,
			    port_table[j].port_id));
			continue;
		}

		switch (ret) {
		case MATCHED_WITH_ADDR_SUBPHYMASK_AND_PORT:
		case MATCHED_WITH_ADDR_AND_SUBPHYMASK:
			_scsih_add_or_del_phys_from_existing_port(ioc,
			    port_entry, port_table, j, port_count);
			break;
		case MATCHED_WITH_ADDR:
			sas_addr = port_table[j].sas_address;
			for (i = 0; i < port_count; i++) {
				if (port_table[i].sas_address == sas_addr)
					lcount++;
			}

			if (count > 1 || lcount > 1)
				port_entry = NULL;
			else
				_scsih_add_or_del_phys_from_existing_port(ioc,
				    port_entry, port_table, j, port_count);
		}

		if (!port_entry)
			continue;

		if (port_entry->port_id != port_table[j].port_id)
			port_entry->port_id = port_table[j].port_id;
		port_entry->flags &= ~HBA_PORT_FLAG_DIRTY_PORT;
		port_entry->phy_mask = port_table[j].phy_mask;
	}

	port_table_entry = NULL;
}

/**
 * _scsih_alloc_vphy - allocate virtual_phy object
 * @ioc: per adapter object
 * @port_id: Port ID number
 * @phy_num: HBA Phy number
 *
 * Returns allocated virtual_phy object.
 */
static struct virtual_phy *
_scsih_alloc_vphy(struct MPT3SAS_ADAPTER *ioc, u8 port_id, u8 phy_num)
{
	struct virtual_phy *vphy;
	struct hba_port *port;

	port = mpt3sas_get_port_by_id(ioc, port_id, 0);
	if (!port)
		return NULL;

	vphy = mpt3sas_get_vphy_by_phy(ioc, port, phy_num);
	if (!vphy) {
		vphy = kzalloc(sizeof(struct virtual_phy), GFP_KERNEL);
		if (!vphy)
			return NULL;

		if (!port->vphys_mask)
			INIT_LIST_HEAD(&port->vphys_list);

		/*
		 * Enable bit corresponding to HBA phy number on its
		 * parent hba_port object's vphys_mask field.
		 */
		port->vphys_mask |= (1 << phy_num);
		vphy->phy_mask |= (1 << phy_num);

		list_add_tail(&vphy->list, &port->vphys_list);

		ioc_info(ioc,
		    "vphy entry: %p, port id: %d, phy:%d is added to port's vphys_list\n",
		    vphy, port->port_id, phy_num);
	}
	return vphy;
}

/**
 * _scsih_sas_host_refresh - refreshing sas host object contents
 * @ioc: per adapter object
 * Context: user
 *
 * During port enable, fw will send topology events for every device. Its
 * possible that the handles may change from the previous setting, so this
 * code keeping handles updating if changed.
 */
static void
_scsih_sas_host_refresh(struct MPT3SAS_ADAPTER *ioc)
{
	u16 sz;
	u16 ioc_status;
	int i;
	Mpi2ConfigReply_t mpi_reply;
	Mpi2SasIOUnitPage0_t *sas_iounit_pg0 = NULL;
	u16 attached_handle;
	u8 link_rate, port_id;
	struct hba_port *port;
	Mpi2SasPhyPage0_t phy_pg0;

	dtmprintk(ioc,
		  ioc_info(ioc, "updating handles for sas_host(0x%016llx)\n",
			   (u64)ioc->sas_hba.sas_address));

	sz = offsetof(Mpi2SasIOUnitPage0_t, PhyData) + (ioc->sas_hba.num_phys
	    * sizeof(Mpi2SasIOUnit0PhyData_t));
	sas_iounit_pg0 = kzalloc(sz, GFP_KERNEL);
	if (!sas_iounit_pg0) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return;
	}

	if ((mpt3sas_config_get_sas_iounit_pg0(ioc, &mpi_reply,
	    sas_iounit_pg0, sz)) != 0)
		goto out;
	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
	if (ioc_status != MPI2_IOCSTATUS_SUCCESS)
		goto out;
	for (i = 0; i < ioc->sas_hba.num_phys ; i++) {
		link_rate = sas_iounit_pg0->PhyData[i].NegotiatedLinkRate >> 4;
		if (i == 0)
			ioc->sas_hba.handle = le16_to_cpu(
			    sas_iounit_pg0->PhyData[0].ControllerDevHandle);
		port_id = sas_iounit_pg0->PhyData[i].Port;
		if (!(mpt3sas_get_port_by_id(ioc, port_id, 0))) {
			port = kzalloc(sizeof(struct hba_port), GFP_KERNEL);
			if (!port)
				goto out;

			port->port_id = port_id;
			ioc_info(ioc,
			    "hba_port entry: %p, port: %d is added to hba_port list\n",
			    port, port->port_id);
			if (ioc->shost_recovery)
				port->flags = HBA_PORT_FLAG_NEW_PORT;
			list_add_tail(&port->list, &ioc->port_table_list);
		}
		/*
		 * Check whether current Phy belongs to HBA vSES device or not.
		 */
		if (le32_to_cpu(sas_iounit_pg0->PhyData[i].ControllerPhyDeviceInfo) &
		    MPI2_SAS_DEVICE_INFO_SEP &&
		    (link_rate >=  MPI2_SAS_NEG_LINK_RATE_1_5)) {
			if ((mpt3sas_config_get_phy_pg0(ioc, &mpi_reply,
			    &phy_pg0, i))) {
				ioc_err(ioc,
				    "failure at %s:%d/%s()!\n",
				     __FILE__, __LINE__, __func__);
				goto out;
			}
			if (!(le32_to_cpu(phy_pg0.PhyInfo) &
			    MPI2_SAS_PHYINFO_VIRTUAL_PHY))
				continue;
			/*
			 * Allocate a virtual_phy object for vSES device, if
			 * this vSES device is hot added.
			 */
			if (!_scsih_alloc_vphy(ioc, port_id, i))
				goto out;
			ioc->sas_hba.phy[i].hba_vphy = 1;
		}

		/*
		 * Add new HBA phys to STL if these new phys got added as part
		 * of HBA Firmware upgrade/downgrade operation.
		 */
		if (!ioc->sas_hba.phy[i].phy) {
			if ((mpt3sas_config_get_phy_pg0(ioc, &mpi_reply,
							&phy_pg0, i))) {
				ioc_err(ioc, "failure at %s:%d/%s()!\n",
					__FILE__, __LINE__, __func__);
				continue;
			}
			ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
				MPI2_IOCSTATUS_MASK;
			if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
				ioc_err(ioc, "failure at %s:%d/%s()!\n",
					__FILE__, __LINE__, __func__);
				continue;
			}
			ioc->sas_hba.phy[i].phy_id = i;
			mpt3sas_transport_add_host_phy(ioc,
				&ioc->sas_hba.phy[i], phy_pg0,
				ioc->sas_hba.parent_dev);
			continue;
		}
		ioc->sas_hba.phy[i].handle = ioc->sas_hba.handle;
		attached_handle = le16_to_cpu(sas_iounit_pg0->PhyData[i].
		    AttachedDevHandle);
		if (attached_handle && link_rate < MPI2_SAS_NEG_LINK_RATE_1_5)
			link_rate = MPI2_SAS_NEG_LINK_RATE_1_5;
		ioc->sas_hba.phy[i].port =
		    mpt3sas_get_port_by_id(ioc, port_id, 0);
		mpt3sas_transport_update_links(ioc, ioc->sas_hba.sas_address,
		    attached_handle, i, link_rate,
		    ioc->sas_hba.phy[i].port);
	}
	/*
	 * Clear the phy details if this phy got disabled as part of
	 * HBA Firmware upgrade/downgrade operation.
	 */
	for (i = ioc->sas_hba.num_phys;
	     i < ioc->sas_hba.nr_phys_allocated; i++) {
		if (ioc->sas_hba.phy[i].phy &&
		    ioc->sas_hba.phy[i].phy->negotiated_linkrate >=
		    SAS_LINK_RATE_1_5_GBPS)
			mpt3sas_transport_update_links(ioc,
				ioc->sas_hba.sas_address, 0, i,
				MPI2_SAS_NEG_LINK_RATE_PHY_DISABLED, NULL);
	}
 out:
	kfree(sas_iounit_pg0);
}

/**
 * _scsih_sas_host_add - create sas host object
 * @ioc: per adapter object
 *
 * Creating host side data object, stored in ioc->sas_hba
 */
static void
_scsih_sas_host_add(struct MPT3SAS_ADAPTER *ioc)
{
	int i;
	Mpi2ConfigReply_t mpi_reply;
	Mpi2SasIOUnitPage0_t *sas_iounit_pg0 = NULL;
	Mpi2SasIOUnitPage1_t *sas_iounit_pg1 = NULL;
	Mpi2SasPhyPage0_t phy_pg0;
	Mpi2SasDevicePage0_t sas_device_pg0;
	Mpi2SasEnclosurePage0_t enclosure_pg0;
	u16 ioc_status;
	u16 sz;
	u8 device_missing_delay;
	u8 num_phys, port_id;
	struct hba_port *port;

	mpt3sas_config_get_number_hba_phys(ioc, &num_phys);
	if (!num_phys) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return;
	}

	ioc->sas_hba.nr_phys_allocated = max_t(u8,
	    MPT_MAX_HBA_NUM_PHYS, num_phys);
	ioc->sas_hba.phy = kcalloc(ioc->sas_hba.nr_phys_allocated,
	    sizeof(struct _sas_phy), GFP_KERNEL);
	if (!ioc->sas_hba.phy) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		goto out;
	}
	ioc->sas_hba.num_phys = num_phys;

	/* sas_iounit page 0 */
	sz = offsetof(Mpi2SasIOUnitPage0_t, PhyData) + (ioc->sas_hba.num_phys *
	    sizeof(Mpi2SasIOUnit0PhyData_t));
	sas_iounit_pg0 = kzalloc(sz, GFP_KERNEL);
	if (!sas_iounit_pg0) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return;
	}
	if ((mpt3sas_config_get_sas_iounit_pg0(ioc, &mpi_reply,
	    sas_iounit_pg0, sz))) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		goto out;
	}
	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
	    MPI2_IOCSTATUS_MASK;
	if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		goto out;
	}

	/* sas_iounit page 1 */
	sz = offsetof(Mpi2SasIOUnitPage1_t, PhyData) + (ioc->sas_hba.num_phys *
	    sizeof(Mpi2SasIOUnit1PhyData_t));
	sas_iounit_pg1 = kzalloc(sz, GFP_KERNEL);
	if (!sas_iounit_pg1) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		goto out;
	}
	if ((mpt3sas_config_get_sas_iounit_pg1(ioc, &mpi_reply,
	    sas_iounit_pg1, sz))) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		goto out;
	}
	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
	    MPI2_IOCSTATUS_MASK;
	if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		goto out;
	}

	ioc->io_missing_delay =
	    sas_iounit_pg1->IODeviceMissingDelay;
	device_missing_delay =
	    sas_iounit_pg1->ReportDeviceMissingDelay;
	if (device_missing_delay & MPI2_SASIOUNIT1_REPORT_MISSING_UNIT_16)
		ioc->device_missing_delay = (device_missing_delay &
		    MPI2_SASIOUNIT1_REPORT_MISSING_TIMEOUT_MASK) * 16;
	else
		ioc->device_missing_delay = device_missing_delay &
		    MPI2_SASIOUNIT1_REPORT_MISSING_TIMEOUT_MASK;

	ioc->sas_hba.parent_dev = &ioc->shost->shost_gendev;
	for (i = 0; i < ioc->sas_hba.num_phys ; i++) {
		if ((mpt3sas_config_get_phy_pg0(ioc, &mpi_reply, &phy_pg0,
		    i))) {
			ioc_err(ioc, "failure at %s:%d/%s()!\n",
				__FILE__, __LINE__, __func__);
			goto out;
		}
		ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
		    MPI2_IOCSTATUS_MASK;
		if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
			ioc_err(ioc, "failure at %s:%d/%s()!\n",
				__FILE__, __LINE__, __func__);
			goto out;
		}

		if (i == 0)
			ioc->sas_hba.handle = le16_to_cpu(sas_iounit_pg0->
			    PhyData[0].ControllerDevHandle);

		port_id = sas_iounit_pg0->PhyData[i].Port;
		if (!(mpt3sas_get_port_by_id(ioc, port_id, 0))) {
			port = kzalloc(sizeof(struct hba_port), GFP_KERNEL);
			if (!port)
				goto out;

			port->port_id = port_id;
			ioc_info(ioc,
			   "hba_port entry: %p, port: %d is added to hba_port list\n",
			   port, port->port_id);
			list_add_tail(&port->list,
			    &ioc->port_table_list);
		}

		/*
		 * Check whether current Phy belongs to HBA vSES device or not.
		 */
		if ((le32_to_cpu(phy_pg0.PhyInfo) &
		    MPI2_SAS_PHYINFO_VIRTUAL_PHY) &&
		    (phy_pg0.NegotiatedLinkRate >> 4) >=
		    MPI2_SAS_NEG_LINK_RATE_1_5) {
			/*
			 * Allocate a virtual_phy object for vSES device.
			 */
			if (!_scsih_alloc_vphy(ioc, port_id, i))
				goto out;
			ioc->sas_hba.phy[i].hba_vphy = 1;
		}

		ioc->sas_hba.phy[i].handle = ioc->sas_hba.handle;
		ioc->sas_hba.phy[i].phy_id = i;
		ioc->sas_hba.phy[i].port =
		    mpt3sas_get_port_by_id(ioc, port_id, 0);
		mpt3sas_transport_add_host_phy(ioc, &ioc->sas_hba.phy[i],
		    phy_pg0, ioc->sas_hba.parent_dev);
	}
	if ((mpt3sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
	    MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, ioc->sas_hba.handle))) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		goto out;
	}
	ioc->sas_hba.enclosure_handle =
	    le16_to_cpu(sas_device_pg0.EnclosureHandle);
	ioc->sas_hba.sas_address = le64_to_cpu(sas_device_pg0.SASAddress);
	ioc_info(ioc, "host_add: handle(0x%04x), sas_addr(0x%016llx), phys(%d)\n",
		 ioc->sas_hba.handle,
		 (u64)ioc->sas_hba.sas_address,
		 ioc->sas_hba.num_phys);

	if (ioc->sas_hba.enclosure_handle) {
		if (!(mpt3sas_config_get_enclosure_pg0(ioc, &mpi_reply,
		    &enclosure_pg0, MPI2_SAS_ENCLOS_PGAD_FORM_HANDLE,
		   ioc->sas_hba.enclosure_handle)))
			ioc->sas_hba.enclosure_logical_id =
			    le64_to_cpu(enclosure_pg0.EnclosureLogicalID);
	}

 out:
	kfree(sas_iounit_pg1);
	kfree(sas_iounit_pg0);
}

/**
 * _scsih_expander_add -  creating expander object
 * @ioc: per adapter object
 * @handle: expander handle
 *
 * Creating expander object, stored in ioc->sas_expander_list.
 *
 * Return: 0 for success, else error.
 */
static int
_scsih_expander_add(struct MPT3SAS_ADAPTER *ioc, u16 handle)
{
	struct _sas_node *sas_expander;
	struct _enclosure_node *enclosure_dev;
	Mpi2ConfigReply_t mpi_reply;
	Mpi2ExpanderPage0_t expander_pg0;
	Mpi2ExpanderPage1_t expander_pg1;
	u32 ioc_status;
	u16 parent_handle;
	u64 sas_address, sas_address_parent = 0;
	int i;
	unsigned long flags;
	struct _sas_port *mpt3sas_port = NULL;
	u8 port_id;

	int rc = 0;

	if (!handle)
		return -1;

	if (ioc->shost_recovery || ioc->pci_error_recovery)
		return -1;

	if ((mpt3sas_config_get_expander_pg0(ioc, &mpi_reply, &expander_pg0,
	    MPI2_SAS_EXPAND_PGAD_FORM_HNDL, handle))) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return -1;
	}

	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
	    MPI2_IOCSTATUS_MASK;
	if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return -1;
	}

	/* handle out of order topology events */
	parent_handle = le16_to_cpu(expander_pg0.ParentDevHandle);
	if (_scsih_get_sas_address(ioc, parent_handle, &sas_address_parent)
	    != 0) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return -1;
	}

	port_id = expander_pg0.PhysicalPort;
	if (sas_address_parent != ioc->sas_hba.sas_address) {
		spin_lock_irqsave(&ioc->sas_node_lock, flags);
		sas_expander = mpt3sas_scsih_expander_find_by_sas_address(ioc,
		    sas_address_parent,
		    mpt3sas_get_port_by_id(ioc, port_id, 0));
		spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
		if (!sas_expander) {
			rc = _scsih_expander_add(ioc, parent_handle);
			if (rc != 0)
				return rc;
		}
	}

	spin_lock_irqsave(&ioc->sas_node_lock, flags);
	sas_address = le64_to_cpu(expander_pg0.SASAddress);
	sas_expander = mpt3sas_scsih_expander_find_by_sas_address(ioc,
	    sas_address, mpt3sas_get_port_by_id(ioc, port_id, 0));
	spin_unlock_irqrestore(&ioc->sas_node_lock, flags);

	if (sas_expander)
		return 0;

	sas_expander = kzalloc(sizeof(struct _sas_node),
	    GFP_KERNEL);
	if (!sas_expander) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return -1;
	}

	sas_expander->handle = handle;
	sas_expander->num_phys = expander_pg0.NumPhys;
	sas_expander->sas_address_parent = sas_address_parent;
	sas_expander->sas_address = sas_address;
	sas_expander->port = mpt3sas_get_port_by_id(ioc, port_id, 0);
	if (!sas_expander->port) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
		    __FILE__, __LINE__, __func__);
		rc = -1;
		goto out_fail;
	}

	ioc_info(ioc, "expander_add: handle(0x%04x), parent(0x%04x), sas_addr(0x%016llx), phys(%d)\n",
		 handle, parent_handle,
		 (u64)sas_expander->sas_address, sas_expander->num_phys);

	if (!sas_expander->num_phys) {
		rc = -1;
		goto out_fail;
	}
	sas_expander->phy = kcalloc(sas_expander->num_phys,
	    sizeof(struct _sas_phy), GFP_KERNEL);
	if (!sas_expander->phy) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		rc = -1;
		goto out_fail;
	}

	INIT_LIST_HEAD(&sas_expander->sas_port_list);
	mpt3sas_port = mpt3sas_transport_port_add(ioc, handle,
	    sas_address_parent, sas_expander->port);
	if (!mpt3sas_port) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		rc = -1;
		goto out_fail;
	}
	sas_expander->parent_dev = &mpt3sas_port->rphy->dev;
	sas_expander->rphy = mpt3sas_port->rphy;

	for (i = 0 ; i < sas_expander->num_phys ; i++) {
		if ((mpt3sas_config_get_expander_pg1(ioc, &mpi_reply,
		    &expander_pg1, i, handle))) {
			ioc_err(ioc, "failure at %s:%d/%s()!\n",
				__FILE__, __LINE__, __func__);
			rc = -1;
			goto out_fail;
		}
		sas_expander->phy[i].handle = handle;
		sas_expander->phy[i].phy_id = i;
		sas_expander->phy[i].port =
		    mpt3sas_get_port_by_id(ioc, port_id, 0);

		if ((mpt3sas_transport_add_expander_phy(ioc,
		    &sas_expander->phy[i], expander_pg1,
		    sas_expander->parent_dev))) {
			ioc_err(ioc, "failure at %s:%d/%s()!\n",
				__FILE__, __LINE__, __func__);
			rc = -1;
			goto out_fail;
		}
	}

	if (sas_expander->enclosure_handle) {
		enclosure_dev =
			mpt3sas_scsih_enclosure_find_by_handle(ioc,
						sas_expander->enclosure_handle);
		if (enclosure_dev)
			sas_expander->enclosure_logical_id =
			    le64_to_cpu(enclosure_dev->pg0.EnclosureLogicalID);
	}

	_scsih_expander_node_add(ioc, sas_expander);
	return 0;

 out_fail:

	if (mpt3sas_port)
		mpt3sas_transport_port_remove(ioc, sas_expander->sas_address,
		    sas_address_parent, sas_expander->port);
	kfree(sas_expander);
	return rc;
}

/**
 * mpt3sas_expander_remove - removing expander object
 * @ioc: per adapter object
 * @sas_address: expander sas_address
 * @port: hba port entry
 */
void
mpt3sas_expander_remove(struct MPT3SAS_ADAPTER *ioc, u64 sas_address,
	struct hba_port *port)
{
	struct _sas_node *sas_expander;
	unsigned long flags;

	if (ioc->shost_recovery)
		return;

	if (!port)
		return;

	spin_lock_irqsave(&ioc->sas_node_lock, flags);
	sas_expander = mpt3sas_scsih_expander_find_by_sas_address(ioc,
	    sas_address, port);
	spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
	if (sas_expander)
		_scsih_expander_node_remove(ioc, sas_expander);
}

/**
 * _scsih_done -  internal SCSI_IO callback handler.
 * @ioc: per adapter object
 * @smid: system request message index
 * @msix_index: MSIX table index supplied by the OS
 * @reply: reply message frame(lower 32bit addr)
 *
 * Callback handler when sending internal generated SCSI_IO.
 * The callback index passed is `ioc->scsih_cb_idx`
 *
 * Return: 1 meaning mf should be freed from _base_interrupt
 *         0 means the mf is freed from this function.
 */
static u8
_scsih_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
{
	MPI2DefaultReply_t *mpi_reply;

	mpi_reply =  mpt3sas_base_get_reply_virt_addr(ioc, reply);
	if (ioc->scsih_cmds.status == MPT3_CMD_NOT_USED)
		return 1;
	if (ioc->scsih_cmds.smid != smid)
		return 1;
	ioc->scsih_cmds.status |= MPT3_CMD_COMPLETE;
	if (mpi_reply) {
		memcpy(ioc->scsih_cmds.reply, mpi_reply,
		    mpi_reply->MsgLength*4);
		ioc->scsih_cmds.status |= MPT3_CMD_REPLY_VALID;
	}
	ioc->scsih_cmds.status &= ~MPT3_CMD_PENDING;
	complete(&ioc->scsih_cmds.done);
	return 1;
}




#define MPT3_MAX_LUNS (255)


/**
 * _scsih_check_access_status - check access flags
 * @ioc: per adapter object
 * @sas_address: sas address
 * @handle: sas device handle
 * @access_status: errors returned during discovery of the device
 *
 * Return: 0 for success, else failure
 */
static u8
_scsih_check_access_status(struct MPT3SAS_ADAPTER *ioc, u64 sas_address,
	u16 handle, u8 access_status)
{
	u8 rc = 1;
	char *desc = NULL;

	switch (access_status) {
	case MPI2_SAS_DEVICE0_ASTATUS_NO_ERRORS:
	case MPI2_SAS_DEVICE0_ASTATUS_SATA_NEEDS_INITIALIZATION:
		rc = 0;
		break;
	case MPI2_SAS_DEVICE0_ASTATUS_SATA_CAPABILITY_FAILED:
		desc = "sata capability failed";
		break;
	case MPI2_SAS_DEVICE0_ASTATUS_SATA_AFFILIATION_CONFLICT:
		desc = "sata affiliation conflict";
		break;
	case MPI2_SAS_DEVICE0_ASTATUS_ROUTE_NOT_ADDRESSABLE:
		desc = "route not addressable";
		break;
	case MPI2_SAS_DEVICE0_ASTATUS_SMP_ERROR_NOT_ADDRESSABLE:
		desc = "smp error not addressable";
		break;
	case MPI2_SAS_DEVICE0_ASTATUS_DEVICE_BLOCKED:
		desc = "device blocked";
		break;
	case MPI2_SAS_DEVICE0_ASTATUS_SATA_INIT_FAILED:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_UNKNOWN:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_AFFILIATION_CONFLICT:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_DIAG:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_IDENTIFICATION:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_CHECK_POWER:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_PIO_SN:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_MDMA_SN:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_UDMA_SN:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_ZONING_VIOLATION:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_NOT_ADDRESSABLE:
	case MPI2_SAS_DEVICE0_ASTATUS_SIF_MAX:
		desc = "sata initialization failed";
		break;
	default:
		desc = "unknown";
		break;
	}

	if (!rc)
		return 0;

	ioc_err(ioc, "discovery errors(%s): sas_address(0x%016llx), handle(0x%04x)\n",
		desc, (u64)sas_address, handle);
	return rc;
}

/**
 * _scsih_check_device - checking device responsiveness
 * @ioc: per adapter object
 * @parent_sas_address: sas address of parent expander or sas host
 * @handle: attached device handle
 * @phy_number: phy number
 * @link_rate: new link rate
 */
static void
_scsih_check_device(struct MPT3SAS_ADAPTER *ioc,
	u64 parent_sas_address, u16 handle, u8 phy_number, u8 link_rate)
{
	Mpi2ConfigReply_t mpi_reply;
	Mpi2SasDevicePage0_t sas_device_pg0;
	struct _sas_device *sas_device = NULL;
	struct _enclosure_node *enclosure_dev = NULL;
	u32 ioc_status;
	unsigned long flags;
	u64 sas_address;
	struct scsi_target *starget;
	struct MPT3SAS_TARGET *sas_target_priv_data;
	u32 device_info;
	struct hba_port *port;

	if ((mpt3sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
	    MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, handle)))
		return;

	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
	if (ioc_status != MPI2_IOCSTATUS_SUCCESS)
		return;

	/* wide port handling ~ we need only handle device once for the phy that
	 * is matched in sas device page zero
	 */
	if (phy_number != sas_device_pg0.PhyNum)
		return;

	/* check if this is end device */
	device_info = le32_to_cpu(sas_device_pg0.DeviceInfo);
	if (!(_scsih_is_end_device(device_info)))
		return;

	spin_lock_irqsave(&ioc->sas_device_lock, flags);
	sas_address = le64_to_cpu(sas_device_pg0.SASAddress);
	port = mpt3sas_get_port_by_id(ioc, sas_device_pg0.PhysicalPort, 0);
	if (!port)
		goto out_unlock;
	sas_device = __mpt3sas_get_sdev_by_addr(ioc,
	    sas_address, port);

	if (!sas_device)
		goto out_unlock;

	if (unlikely(sas_device->handle != handle)) {
		starget = sas_device->starget;
		sas_target_priv_data = starget->hostdata;
		starget_printk(KERN_INFO, starget,
			"handle changed from(0x%04x) to (0x%04x)!!!\n",
			sas_device->handle, handle);
		sas_target_priv_data->handle = handle;
		sas_device->handle = handle;
		if (le16_to_cpu(sas_device_pg0.Flags) &
		     MPI2_SAS_DEVICE0_FLAGS_ENCL_LEVEL_VALID) {
			sas_device->enclosure_level =
				sas_device_pg0.EnclosureLevel;
			memcpy(sas_device->connector_name,
				sas_device_pg0.ConnectorName, 4);
			sas_device->connector_name[4] = '\0';
		} else {
			sas_device->enclosure_level = 0;
			sas_device->connector_name[0] = '\0';
		}

		sas_device->enclosure_handle =
				le16_to_cpu(sas_device_pg0.EnclosureHandle);
		sas_device->is_chassis_slot_valid = 0;
		enclosure_dev = mpt3sas_scsih_enclosure_find_by_handle(ioc,
						sas_device->enclosure_handle);
		if (enclosure_dev) {
			sas_device->enclosure_logical_id =
			    le64_to_cpu(enclosure_dev->pg0.EnclosureLogicalID);
			if (le16_to_cpu(enclosure_dev->pg0.Flags) &
			    MPI2_SAS_ENCLS0_FLAGS_CHASSIS_SLOT_VALID) {
				sas_device->is_chassis_slot_valid = 1;
				sas_device->chassis_slot =
					enclosure_dev->pg0.ChassisSlot;
			}
		}
	}

	/* check if device is present */
	if (!(le16_to_cpu(sas_device_pg0.Flags) &
	    MPI2_SAS_DEVICE0_FLAGS_DEVICE_PRESENT)) {
		ioc_err(ioc, "device is not present handle(0x%04x), flags!!!\n",
			handle);
		goto out_unlock;
	}

	/* check if there were any issues with discovery */
	if (_scsih_check_access_status(ioc, sas_address, handle,
	    sas_device_pg0.AccessStatus))
		goto out_unlock;

	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
	_scsih_ublock_io_device(ioc, sas_address, port);

	if (sas_device)
		sas_device_put(sas_device);
	return;

out_unlock:
	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
	if (sas_device)
		sas_device_put(sas_device);
}

/**
 * _scsih_add_device -  creating sas device object
 * @ioc: per adapter object
 * @handle: sas device handle
 * @phy_num: phy number end device attached to
 * @is_pd: is this hidden raid component
 *
 * Creating end device object, stored in ioc->sas_device_list.
 *
 * Return: 0 for success, non-zero for failure.
 */
static int
_scsih_add_device(struct MPT3SAS_ADAPTER *ioc, u16 handle, u8 phy_num,
	u8 is_pd)
{
	Mpi2ConfigReply_t mpi_reply;
	Mpi2SasDevicePage0_t sas_device_pg0;
	struct _sas_device *sas_device;
	struct _enclosure_node *enclosure_dev = NULL;
	u32 ioc_status;
	u64 sas_address;
	u32 device_info;
	u8 port_id;

	if ((mpt3sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
	    MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, handle))) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return -1;
	}

	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
	    MPI2_IOCSTATUS_MASK;
	if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return -1;
	}

	/* check if this is end device */
	device_info = le32_to_cpu(sas_device_pg0.DeviceInfo);
	if (!(_scsih_is_end_device(device_info)))
		return -1;
	set_bit(handle, ioc->pend_os_device_add);
	sas_address = le64_to_cpu(sas_device_pg0.SASAddress);

	/* check if device is present */
	if (!(le16_to_cpu(sas_device_pg0.Flags) &
	    MPI2_SAS_DEVICE0_FLAGS_DEVICE_PRESENT)) {
		ioc_err(ioc, "device is not present handle(0x04%x)!!!\n",
			handle);
		return -1;
	}

	/* check if there were any issues with discovery */
	if (_scsih_check_access_status(ioc, sas_address, handle,
	    sas_device_pg0.AccessStatus))
		return -1;

	port_id = sas_device_pg0.PhysicalPort;
	sas_device = mpt3sas_get_sdev_by_addr(ioc,
	    sas_address, mpt3sas_get_port_by_id(ioc, port_id, 0));
	if (sas_device) {
		clear_bit(handle, ioc->pend_os_device_add);
		sas_device_put(sas_device);
		return -1;
	}

	if (sas_device_pg0.EnclosureHandle) {
		enclosure_dev =
			mpt3sas_scsih_enclosure_find_by_handle(ioc,
			    le16_to_cpu(sas_device_pg0.EnclosureHandle));
		if (enclosure_dev == NULL)
			ioc_info(ioc, "Enclosure handle(0x%04x) doesn't match with enclosure device!\n",
				 sas_device_pg0.EnclosureHandle);
	}

	sas_device = kzalloc(sizeof(struct _sas_device),
	    GFP_KERNEL);
	if (!sas_device) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
		return 0;
	}

	kref_init(&sas_device->refcount);
	sas_device->handle = handle;
	if (_scsih_get_sas_address(ioc,
	    le16_to_cpu(sas_device_pg0.ParentDevHandle),
	    &sas_device->sas_address_parent) != 0)
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
			__FILE__, __LINE__, __func__);
	sas_device->enclosure_handle =
	    le16_to_cpu(sas_device_pg0.EnclosureHandle);
	if (sas_device->enclosure_handle != 0)
		sas_device->slot =
		    le16_to_cpu(sas_device_pg0.Slot);
	sas_device->device_info = device_info;
	sas_device->sas_address = sas_address;
	sas_device->phy = sas_device_pg0.PhyNum;
	sas_device->fast_path = (le16_to_cpu(sas_device_pg0.Flags) &
	    MPI25_SAS_DEVICE0_FLAGS_FAST_PATH_CAPABLE) ? 1 : 0;
	sas_device->port = mpt3sas_get_port_by_id(ioc, port_id, 0);
	if (!sas_device->port) {
		ioc_err(ioc, "failure at %s:%d/%s()!\n",
		    __FILE__, __LINE__, __func__);
		goto out;
	}

	if (le16_to_cpu(sas_device_pg0.Flags)
		& MPI2_SAS_DEVICE0_FLAGS_ENCL_LEVEL_VALID) {
		sas_device->enclosure_level =
			sas_device_pg0.EnclosureLevel;
		memcpy(sas_device->connector_name,
			sas_device_pg0.ConnectorName, 4);
		sas_device->connector_name[4] = '\0';
	} else {
		sas_device->enclosure_level = 0;
		sas_device->connector_name[0] = '\0';
	}
	/* get enclosure_logical_id & chassis_slot*/
	sas_device->is_chassis_slot_valid = 0;
	if (enclosure_dev) {
		sas_device->enclosure_logical_id =
		    le64_to_cpu(enclosure_dev->pg0.EnclosureLogicalID);
		if (le16_to_cpu(enclosure_dev->pg0.Flags) &
		    MPI2_SAS_ENCLS0_FLAGS_CHASSIS_SLOT_VALID) {
			sas_device->is_chassis_slot_valid = 1;
			sas_device->chassis_slot =
					enclosure_dev->pg0.ChassisSlot;
		}
	}

	/* get device name */
	sas_device->device_name = le64_to_cpu(sas_device_pg0.DeviceName);
	sas_device->port_type = sas_device_pg0.MaxPortConnections;
	ioc_info(ioc,
	    "handle(0x%0x) sas_address(0x%016llx) port_type(0x%0x)\n",
	    handle, sas_device->sas_address, sas_device->port_type);

	if (ioc->wait_for_discovery_to_complete)
		_scsih_sas_device_init_add(ioc, sas_device);
	else
		_scsih_sas_device_add(ioc, sas_device);

out:
	sas_device_put(sas_device);
	return 0;
}

/**
 * _scsih_remove_device -  removing sas device object
 * @ioc: per adapter object
 * @sas_device: the sas_device object
 */
static void
_scsih_remove_device(struct MPT3SAS_ADAPTER *ioc,
	struct _sas_device *sas_device)
{
	struct MPT3SAS_TARGET *sas_target_priv_data;

	if ((ioc->pdev->subsystem_vendor == PCI_VENDOR_ID_IBM) &&
	     (sas_device->pfa_led_on)) {
		_scsih_turn_off_pfa_led(ioc, sas_device);
		sas_device->pfa_led_on = 0;
	}

	dewtprintk(ioc,
		   ioc_info(ioc, "%s: enter: handle(0x%04x), sas_addr(0x%016llx)\n",
			    __func__,
			    sas_device->handle, (u64)sas_device->sas_address));

	dewtprintk(ioc, _scsih_display_enclosure_chassis_info(ioc, sas_device,
	    NULL, NULL));

	if (sas_device->starget && sas_device->starget->hostdata) {
		sas_target_priv_data = sas_device->starget->hostdata;
		sas_target_priv_data->deleted = 1;
		_scsih_ublock_io_device(ioc, sas_device->sas_address,
		    sas_device->port);
		sas_target_priv_data->handle =
		     MPT3SAS_INVALID_DEVICE_HANDLE;
	}

	if (!ioc->hide_drives)
		mpt3sas_transport_port_remove(ioc,
		    sas_device->sas_address,
		    sas_device->sas_address_parent,
		    sas_device->port);

	ioc_info(ioc, "removing handle(0x%04x), sas_addr(0x%016llx)\n",
		 sas_device->handle, (u64)sas_device->sas_address);