mpt2sas - scsih

@@ -0,0 +1,5112 @@
+/*
+ * Scsi Host Layer for MPT (Message Passing Technology) based controllers
+ *
+ * This code is based on drivers/scsi/mpt2sas/mpt2_scsih.c
+ * Copyright (C) 2007-2008  LSI Corporation
+ *  (mailto:[email protected])
+ *
+ * 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/version.h>
+#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 "mpt2sas_base.h"
+
+MODULE_AUTHOR(MPT2SAS_AUTHOR);
+MODULE_DESCRIPTION(MPT2SAS_DESCRIPTION);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(MPT2SAS_DRIVER_VERSION);
+
+#define RAID_CHANNEL 1
+
+/* forward proto's */
+static void _scsih_expander_node_remove(struct MPT2SAS_ADAPTER *ioc,
+    struct _sas_node *sas_expander);
+static void _firmware_event_work(struct work_struct *work);
+
+/* global parameters */
+LIST_HEAD(ioc_list);
+
+/* local parameters */
+static u32 logging_level;
+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 transport_cb_idx = -1;
+static u8 config_cb_idx = -1;
+static int mpt_ids = 0;
+
+/* command line options */
+MODULE_PARM_DESC(logging_level, " bits for enabling additional logging info "
+    "(default=0)");
+
+/* scsi-mid layer global parmeter is max_report_luns, which is 511 */
+#define MPT2SAS_MAX_LUN (16895)
+static int max_lun = MPT2SAS_MAX_LUN;
+module_param(max_lun, int, 0);
+MODULE_PARM_DESC(max_lun, " max lun, default=16895 ");
+
+/**
+ * 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 MPT2SAS_RESCAN_AFTER_HOST_RESET (0xFFFF)
+/**
+ * struct fw_event_work - firmware event struct
+ * @list: link list framework
+ * @work: work object (ioc->fault_reset_work_q)
+ * @ioc: per adapter object
+ * @VF_ID: virtual function id
+ * @host_reset_handling: handling events during host reset
+ * @ignore: flag meaning this event has been marked to ignore
+ * @event: firmware event MPI2_EVENT_XXX defined in mpt2_ioc.h
+ * @event_data: reply event data payload follows
+ *
+ * This object stored on ioc->fw_event_list.
+ */
+struct fw_event_work {
+	struct list_head 	list;
+	struct delayed_work	work;
+	struct MPT2SAS_ADAPTER *ioc;
+	u8			VF_ID;
+	u8			host_reset_handling;
+	u8			ignore;
+	u16			event;
+	void			*event_data;
+};
+
+/**
+ * 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
+ * @valid_reply: flag set for reply message
+ * @timeout: timeout for this command
+ * @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	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;
+};
+
+/*
+ * The pci device ids are defined in mpi/mpi2_cnfg.h.
+ */
+static struct pci_device_id scsih_pci_table[] = {
+	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2004,
+		PCI_ANY_ID, PCI_ANY_ID },
+	/* Falcon ~ 2008*/
+	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2008,
+		PCI_ANY_ID, PCI_ANY_ID },
+	/* Liberator ~ 2108 */
+	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_1,
+		PCI_ANY_ID, PCI_ANY_ID },
+	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_2,
+		PCI_ANY_ID, PCI_ANY_ID },
+	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_3,
+		PCI_ANY_ID, PCI_ANY_ID },
+	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_1,
+		PCI_ANY_ID, PCI_ANY_ID },
+	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_2,
+		PCI_ANY_ID, PCI_ANY_ID },
+	{0}	/* Terminating entry */
+};
+MODULE_DEVICE_TABLE(pci, scsih_pci_table);
+
+/**
+ * scsih_set_debug_level - global setting of ioc->logging_level.
+ *
+ * Note: The logging levels are defined in mpt2sas_debug.h.
+ */
+static int
+scsih_set_debug_level(const char *val, struct kernel_param *kp)
+{
+	int ret = param_set_int(val, kp);
+	struct MPT2SAS_ADAPTER *ioc;
+
+	if (ret)
+		return ret;
+
+	printk("setting logging_level(0x%08x)\n", logging_level);
+	list_for_each_entry(ioc, &ioc_list, list)
+		ioc->logging_level = logging_level;
+	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
+ *
+ * Returns 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)
+{
+	__le64 *boot_sas_address;
+
+	boot_sas_address = (__le64 *)&boot_device->SASAddress;
+	return (sas_address == le64_to_cpu(*boot_sas_address)) ?  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
+ *
+ * Returns 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)
+{
+	__le64 *boot_device_name;
+
+	boot_device_name = (__le64 *)&boot_device->DeviceName;
+	return (device_name == le64_to_cpu(*boot_device_name)) ? 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
+ *
+ * Returns 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)
+{
+	__le64 *boot_enclosure_logical_id;
+
+	boot_enclosure_logical_id = (__le64 *)&boot_device->EnclosureLogicalID;
+	return (enclosure_logical_id == le64_to_cpu(*boot_enclosure_logical_id)
+	    && slot_number == le16_to_cpu(boot_device->SlotNumber)) ? 1 : 0;
+}
+
+/**
+ * _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_number: slot number
+ * @form: specifies boot device form
+ * @boot_device: boot device object from bios page 2
+ *
+ * Returns 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_determine_boot_device - determine boot device.
+ * @ioc: per adapter object
+ * @device: either sas_device or raid_device object
+ * @is_raid: [flag] 1 = raid object, 0 = sas object
+ *
+ * Determines whether this device should be first reported device to
+ * to scsi-ml or sas transport, this purpose is for persistant 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 and is_raid flag in the ioc object.
+ * The saved data to be used later in _scsih_probe_boot_devices().
+ */
+static void
+_scsih_determine_boot_device(struct MPT2SAS_ADAPTER *ioc,
+    void *device, u8 is_raid)
+{
+	struct _sas_device *sas_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->wait_for_port_enable_to_complete)
+		return;
+
+	if (!is_raid) {
+		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;
+	} else {
+		raid_device = device;
+		sas_address = raid_device->wwid;
+		device_name = 0;
+		enclosure_logical_id = 0;
+		slot = 0;
+	}
+
+	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, printk(MPT2SAS_DEBUG_FMT
+			   "%s: req_boot_device(0x%016llx)\n",
+			    ioc->name, __func__,
+			    (unsigned long long)sas_address));
+			ioc->req_boot_device.device = device;
+			ioc->req_boot_device.is_raid = is_raid;
+		}
+	}
+
+	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, printk(MPT2SAS_DEBUG_FMT
+			   "%s: req_alt_boot_device(0x%016llx)\n",
+			    ioc->name, __func__,
+			    (unsigned long long)sas_address));
+			ioc->req_alt_boot_device.device = device;
+			ioc->req_alt_boot_device.is_raid = is_raid;
+		}
+	}
+
+	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, printk(MPT2SAS_DEBUG_FMT
+			   "%s: current_boot_device(0x%016llx)\n",
+			    ioc->name, __func__,
+			    (unsigned long long)sas_address));
+			ioc->current_boot_device.device = device;
+			ioc->current_boot_device.is_raid = is_raid;
+		}
+	}
+}
+
+/**
+ * scsih_sas_device_find_by_sas_address - sas device search
+ * @ioc: per adapter object
+ * @sas_address: sas address
+ * 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 *
+scsih_sas_device_find_by_sas_address(struct MPT2SAS_ADAPTER *ioc,
+    u64 sas_address)
+{
+	struct _sas_device *sas_device, *r;
+
+	r = NULL;
+	if (ioc->wait_for_port_enable_to_complete) {
+		list_for_each_entry(sas_device, &ioc->sas_device_init_list,
+		    list) {
+			if (sas_device->handle != sas_address)
+				continue;
+			r = sas_device;
+			goto out;
+		}
+	} else {
+		list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
+			if (sas_device->sas_address != sas_address)
+				continue;
+			r = sas_device;
+			goto out;
+		}
+	}
+ out:
+	return r;
+}
+
+/**
+ * _scsih_sas_device_find_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.
+ */
+static struct _sas_device *
+_scsih_sas_device_find_by_handle(struct MPT2SAS_ADAPTER *ioc, u16 handle)
+{
+	struct _sas_device *sas_device, *r;
+
+	r = NULL;
+	if (ioc->wait_for_port_enable_to_complete) {
+		list_for_each_entry(sas_device, &ioc->sas_device_init_list,
+		    list) {
+			if (sas_device->handle != handle)
+				continue;
+			r = sas_device;
+			goto out;
+		}
+	} else {
+		list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
+			if (sas_device->handle != handle)
+				continue;
+			r = sas_device;
+			goto out;
+		}
+	}
+
+ out:
+	return r;
+}
+
+/**
+ * _scsih_sas_device_remove - remove sas_device from list.
+ * @ioc: per adapter object
+ * @sas_device: the sas_device object
+ * Context: Calling function will acquire ioc->sas_device_lock.
+ *
+ * Removing object and freeing associated memory from the ioc->sas_device_list.
+ */
+static void
+_scsih_sas_device_remove(struct MPT2SAS_ADAPTER *ioc,
+    struct _sas_device *sas_device)
+{
+	list_del(&sas_device->list);
+	memset(sas_device, 0, sizeof(struct _sas_device));
+	kfree(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 MPT2SAS_ADAPTER *ioc,
+    struct _sas_device *sas_device)
+{
+	unsigned long flags;
+	u16 handle, parent_handle;
+	u64 sas_address;
+
+	dewtprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: handle"
+	    "(0x%04x), sas_addr(0x%016llx)\n", ioc->name, __func__,
+	    sas_device->handle,(unsigned long long)sas_device->sas_address));
+
+	spin_lock_irqsave(&ioc->sas_device_lock, flags);
+	list_add_tail(&sas_device->list, &ioc->sas_device_list);
+	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+
+	handle = sas_device->handle;
+	parent_handle = sas_device->parent_handle;
+	sas_address = sas_device->sas_address;
+	if (!transport_port_add(ioc, handle, parent_handle)) {
+		spin_lock_irqsave(&ioc->sas_device_lock, flags);
+		_scsih_sas_device_remove(ioc, sas_device);
+		spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+	} else if (handle != sas_device->handle ||
+	     parent_handle != sas_device->parent_handle)
+		transport_port_remove(ioc, sas_address, parent_handle);
+}
+
+/**
+ * _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 MPT2SAS_ADAPTER *ioc,
+    struct _sas_device *sas_device)
+{
+	unsigned long flags;
+
+	dewtprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: handle"
+	    "(0x%04x), sas_addr(0x%016llx)\n", ioc->name, __func__,
+	    sas_device->handle,(unsigned long long)sas_device->sas_address));
+
+	spin_lock_irqsave(&ioc->sas_device_lock, flags);
+	list_add_tail(&sas_device->list, &ioc->sas_device_init_list);
+	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+	_scsih_determine_boot_device(ioc, sas_device, 0);
+}
+
+/**
+ * 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 *
+scsih_expander_find_by_handle(struct MPT2SAS_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;
+}
+
+/**
+ * _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 MPT2SAS_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;
+}
+
+/**
+ * _scsih_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.
+ */
+static struct _raid_device *
+_scsih_raid_device_find_by_handle(struct MPT2SAS_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
+ * @handle: sas device handle (assigned by firmware)
+ * 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 MPT2SAS_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 MPT2SAS_ADAPTER *ioc,
+    struct _raid_device *raid_device)
+{
+	unsigned long flags;
+
+	dewtprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: handle"
+	    "(0x%04x), wwid(0x%016llx)\n", ioc->name, __func__,
+	    raid_device->handle,(unsigned long long)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
+ *
+ * This is removed from the raid_device_list link list.
+ */
+static void
+_scsih_raid_device_remove(struct MPT2SAS_ADAPTER *ioc,
+    struct _raid_device *raid_device)
+{
+	list_del(&raid_device->list);
+	kfree(raid_device);
+}
+
+/**
+ * scsih_expander_find_by_sas_address - expander device search
+ * @ioc: per adapter object
+ * @sas_address: sas address
+ * Context: Calling function should acquire ioc->sas_node_lock.
+ *
+ * This searches for expander device based on sas_address, then returns the
+ * sas_node object.
+ */
+struct _sas_node *
+scsih_expander_find_by_sas_address(struct MPT2SAS_ADAPTER *ioc,
+    u64 sas_address)
+{
+	struct _sas_node *sas_expander, *r;
+
+	r = NULL;
+	list_for_each_entry(sas_expander, &ioc->sas_expander_list, list) {
+		if (sas_expander->sas_address != sas_address)
+			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.
+ *
+ * Return nothing.
+ */
+static void
+_scsih_expander_node_add(struct MPT2SAS_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
+ *
+ * Returns 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_scsi_lookup_get - returns scmd entry
+ * @ioc: per adapter object
+ * @smid: system request message index
+ * Context: This function will acquire ioc->scsi_lookup_lock.
+ *
+ * Returns the smid stored scmd pointer.
+ */
+static struct scsi_cmnd *
+_scsih_scsi_lookup_get(struct MPT2SAS_ADAPTER *ioc, u16 smid)
+{
+	unsigned long	flags;
+	struct scsi_cmnd *scmd;
+
+	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
+	scmd = ioc->scsi_lookup[smid - 1].scmd;
+	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
+	return scmd;
+}
+
+/**
+ * mptscsih_getclear_scsi_lookup - returns scmd entry
+ * @ioc: per adapter object
+ * @smid: system request message index
+ * Context: This function will acquire ioc->scsi_lookup_lock.
+ *
+ * Returns the smid stored scmd pointer, as well as clearing the scmd pointer.
+ */
+static struct scsi_cmnd *
+_scsih_scsi_lookup_getclear(struct MPT2SAS_ADAPTER *ioc, u16 smid)
+{
+	unsigned long	flags;
+	struct scsi_cmnd *scmd;
+
+	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
+	scmd = ioc->scsi_lookup[smid - 1].scmd;
+	ioc->scsi_lookup[smid - 1].scmd = NULL;
+	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
+	return scmd;
+}
+
+/**
+ * _scsih_scsi_lookup_set - updates scmd entry in lookup
+ * @ioc: per adapter object
+ * @smid: system request message index
+ * @scmd: pointer to scsi command object
+ * Context: This function will acquire ioc->scsi_lookup_lock.
+ *
+ * This will save scmd pointer in the scsi_lookup array.
+ *
+ * Return nothing.
+ */
+static void
+_scsih_scsi_lookup_set(struct MPT2SAS_ADAPTER *ioc, u16 smid,
+    struct scsi_cmnd *scmd)
+{
+	unsigned long	flags;
+
+	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
+	ioc->scsi_lookup[smid - 1].scmd = scmd;
+	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
+}
+
+/**
+ * _scsih_scsi_lookup_find_by_scmd - scmd lookup
+ * @ioc: per adapter object
+ * @smid: system request message index
+ * @scmd: pointer to scsi command object
+ * Context: This function will acquire ioc->scsi_lookup_lock.
+ *
+ * This will search for a scmd pointer in the scsi_lookup array,
+ * returning the revelent smid.  A returned value of zero means invalid.
+ */
+static u16
+_scsih_scsi_lookup_find_by_scmd(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd
+    *scmd)
+{
+	u16 smid;
+	unsigned long	flags;
+	int i;
+
+	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
+	smid = 0;
+	for (i = 0; i < ioc->request_depth; i++) {
+		if (ioc->scsi_lookup[i].scmd == scmd) {
+			smid = i + 1;
+			goto out;
+		}
+	}
+ out:
+	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
+	return smid;
+}
+
+/**
+ * _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 MPT2SAS_ADAPTER *ioc, int id,
+    int channel)
+{
+	u8 found;
+	unsigned long	flags;
+	int i;
+
+	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
+	found = 0;
+	for (i = 0 ; i < ioc->request_depth; i++) {
+		if (ioc->scsi_lookup[i].scmd &&
+		    (ioc->scsi_lookup[i].scmd->device->id == id &&
+		    ioc->scsi_lookup[i].scmd->device->channel == channel)) {
+			found = 1;
+			goto out;
+		}
+	}
+ out:
+	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
+	return found;
+}
+
+/**
+ * _scsih_get_chain_buffer_dma - obtain block of chains (dma address)
+ * @ioc: per adapter object
+ * @smid: system request message index
+ *
+ * Returns phys pointer to chain buffer.
+ */
+static dma_addr_t
+_scsih_get_chain_buffer_dma(struct MPT2SAS_ADAPTER *ioc, u16 smid)
+{
+	return (ioc->chain_dma + ((smid - 1) * (ioc->request_sz *
+	    ioc->chains_needed_per_io)));
+}
+
+/**
+ * _scsih_get_chain_buffer - obtain block of chains assigned to a mf request
+ * @ioc: per adapter object
+ * @smid: system request message index
+ *
+ * Returns virt pointer to chain buffer.
+ */
+static void *
+_scsih_get_chain_buffer(struct MPT2SAS_ADAPTER *ioc, u16 smid)
+{
+	return (void *)(ioc->chain + ((smid - 1) * (ioc->request_sz *
+	    ioc->chains_needed_per_io)));
+}
+
+/**
+ * _scsih_build_scatter_gather - main sg creation routine
+ * @ioc: per adapter object
+ * @scmd: scsi command
+ * @smid: system request message index
+ * Context: none.
+ *
+ * The main routine that builds scatter gather table from a given
+ * scsi request sent via the .queuecommand main handler.
+ *
+ * Returns 0 success, anything else error
+ */
+static int
+_scsih_build_scatter_gather(struct MPT2SAS_ADAPTER *ioc,
+    struct scsi_cmnd *scmd, u16 smid)
+{
+	Mpi2SCSIIORequest_t *mpi_request;
+	dma_addr_t chain_dma;
+	struct scatterlist *sg_scmd;
+	void *sg_local, *chain;
+	u32 chain_offset;
+	u32 chain_length;
+	u32 chain_flags;
+	u32 sges_left;
+	u32 sges_in_segment;
+	u32 sgl_flags;
+	u32 sgl_flags_last_element;
+	u32 sgl_flags_end_buffer;
+
+	mpi_request = base_get_msg_frame(ioc, smid);
+
+	/* init scatter gather flags */
+	sgl_flags = MPI2_SGE_FLAGS_SIMPLE_ELEMENT;
+	if (scmd->sc_data_direction == DMA_TO_DEVICE)
+	        sgl_flags |= MPI2_SGE_FLAGS_HOST_TO_IOC;
+	sgl_flags_last_element = (sgl_flags | MPI2_SGE_FLAGS_LAST_ELEMENT)
+	    << MPI2_SGE_FLAGS_SHIFT;
+	sgl_flags_end_buffer = (sgl_flags | MPI2_SGE_FLAGS_LAST_ELEMENT |
+	    MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_END_OF_LIST)
+	    << MPI2_SGE_FLAGS_SHIFT;
+	sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
+
+	sg_scmd = scsi_sglist(scmd);
+	sges_left = scsi_dma_map(scmd);
+	if (!sges_left) {
+		sdev_printk(KERN_ERR, scmd->device, "pci_map_sg"
+		" failed: request for %d bytes!\n", scsi_bufflen(scmd));
+		return -ENOMEM;
+	}
+
+	sg_local = &mpi_request->SGL;
+	sges_in_segment = ioc->max_sges_in_main_message;
+	if (sges_left <= sges_in_segment)
+		goto fill_in_last_segment;
+
+	mpi_request->ChainOffset = (offsetof(Mpi2SCSIIORequest_t, SGL) +
+	    (sges_in_segment * ioc->sge_size))/4;
+
+	/* fill in main message segment when there is a chain following */
+	while (sges_in_segment) {
+		if (sges_in_segment == 1)
+			ioc->base_add_sg_single(sg_local,
+			    sgl_flags_last_element | sg_dma_len(sg_scmd),
+			    sg_dma_address(sg_scmd));
+		else
+			ioc->base_add_sg_single(sg_local, sgl_flags |
+			    sg_dma_len(sg_scmd), sg_dma_address(sg_scmd));
+		sg_scmd = sg_next(sg_scmd);
+		sg_local += ioc->sge_size;
+		sges_left--;
+		sges_in_segment--;
+	}
+
+	/* initializing the chain flags and pointers */
+	chain_flags = MPI2_SGE_FLAGS_CHAIN_ELEMENT << MPI2_SGE_FLAGS_SHIFT;
+	chain = _scsih_get_chain_buffer(ioc, smid);
+	chain_dma = _scsih_get_chain_buffer_dma(ioc, smid);
+	do {
+		sges_in_segment = (sges_left <=
+		    ioc->max_sges_in_chain_message) ? sges_left :
+		    ioc->max_sges_in_chain_message;
+		chain_offset = (sges_left == sges_in_segment) ?
+		    0: (sges_in_segment * ioc->sge_size)/4;
+		chain_length = sges_in_segment * ioc->sge_size;
+		if (chain_offset) {
+			chain_offset = chain_offset <<
+			    MPI2_SGE_CHAIN_OFFSET_SHIFT;
+			chain_length += ioc->sge_size;
+		}
+		ioc->base_add_sg_single(sg_local, chain_flags | chain_offset |
+		    chain_length, chain_dma);
+		sg_local = chain;
+		if (!chain_offset)
+			goto fill_in_last_segment;
+
+		/* fill in chain segments */
+		while (sges_in_segment) {
+			if (sges_in_segment == 1)
+				ioc->base_add_sg_single(sg_local,
+				    sgl_flags_last_element |
+				    sg_dma_len(sg_scmd),
+				    sg_dma_address(sg_scmd));
+			else
+				ioc->base_add_sg_single(sg_local, sgl_flags |
+				    sg_dma_len(sg_scmd),
+				    sg_dma_address(sg_scmd));
+			sg_scmd = sg_next(sg_scmd);
+			sg_local += ioc->sge_size;
+			sges_left--;
+			sges_in_segment--;
+		}
+
+		chain_dma += ioc->request_sz;
+		chain += ioc->request_sz;
+	} while(1);
+
+
+ fill_in_last_segment:
+
+	/* fill the last segment */
+	while (sges_left) {
+		if (sges_left == 1)
+			ioc->base_add_sg_single(sg_local, sgl_flags_end_buffer |
+			    sg_dma_len(sg_scmd), sg_dma_address(sg_scmd));
+		else
+			ioc->base_add_sg_single(sg_local, sgl_flags |
+			    sg_dma_len(sg_scmd), sg_dma_address(sg_scmd));
+		sg_scmd = sg_next(sg_scmd);
+		sg_local += ioc->sge_size;
+		sges_left--;
+	}
+
+	return 0;
+}
+
+/**
+ * scsih_change_queue_depth - setting device queue depth
+ * @sdev: scsi device struct
+ * @qdepth: requested queue depth
+ *
+ * Returns queue depth.
+ */
+static int
+scsih_change_queue_depth(struct scsi_device *sdev, int qdepth)
+{
+	struct Scsi_Host *shost = sdev->host;
+	int max_depth;
+	int tag_type;
+
+	max_depth = shost->can_queue;
+	if (!sdev->tagged_supported)
+		max_depth = 1;
+	if (qdepth > max_depth)
+		qdepth = max_depth;
+	tag_type = (qdepth == 1) ? 0 : MSG_SIMPLE_TAG;
+	scsi_adjust_queue_depth(sdev, tag_type, qdepth);
+
+	if (sdev->inquiry_len > 7)
+		sdev_printk(KERN_INFO, sdev, "qdepth(%d), tagged(%d), "
+		"simple(%d), ordered(%d), scsi_level(%d), cmd_que(%d)\n",
+		sdev->queue_depth, sdev->tagged_supported, sdev->simple_tags,
+		sdev->ordered_tags, sdev->scsi_level,
+		(sdev->inquiry[7] & 2) >> 1);
+
+	return sdev->queue_depth;
+}
+
+/**
+ * scsih_change_queue_depth - changing device queue tag type
+ * @sdev: scsi device struct
+ * @tag_type: requested tag type
+ *
+ * Returns queue tag type.
+ */
+static int
+scsih_change_queue_type(struct scsi_device *sdev, int tag_type)
+{
+	if (sdev->tagged_supported) {
+		scsi_set_tag_type(sdev, tag_type);
+		if (tag_type)
+			scsi_activate_tcq(sdev, sdev->queue_depth);
+		else
+			scsi_deactivate_tcq(sdev, sdev->queue_depth);
+	} else
+		tag_type = 0;
+
+	return tag_type;
+}
+
+/**
+ * scsih_target_alloc - target add routine
+ * @starget: scsi target struct
+ *
+ * Returns 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 MPT2SAS_ADAPTER *ioc = shost_priv(shost);
+	struct MPT2SAS_TARGET *sas_target_priv_data;
+	struct _sas_device *sas_device;
+	struct _raid_device *raid_device;
+	unsigned long flags;
+	struct sas_rphy		*rphy;
+
+	sas_target_priv_data = kzalloc(sizeof(struct scsi_target), 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 = MPT2SAS_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;
+			raid_device->starget = starget;
+		}
+		spin_unlock_irqrestore(&ioc->raid_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 = scsih_sas_device_find_by_sas_address(ioc,
+	   rphy->identify.sas_address);
+
+	if (sas_device) {
+		sas_target_priv_data->handle = sas_device->handle;
+		sas_target_priv_data->sas_address = sas_device->sas_address;
+		sas_device->starget = starget;
+		sas_device->id = starget->id;
+		sas_device->channel = starget->channel;
+		if (sas_device->hidden_raid_component)
+			sas_target_priv_data->flags |=
+			    MPT_TARGET_FLAGS_RAID_COMPONENT;
+	}
+	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+
+	return 0;
+}
+
+/**
+ * scsih_target_destroy - target destroy routine
+ * @starget: scsi target struct
+ *
+ * Returns nothing.
+ */
+static void
+scsih_target_destroy(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
+	struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
+	struct MPT2SAS_TARGET *sas_target_priv_data;
+	struct _sas_device *sas_device;
+	struct _raid_device *raid_device;
+	unsigned long flags;
+	struct sas_rphy		*rphy;
+
+	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;
+	}
+
+	spin_lock_irqsave(&ioc->sas_device_lock, flags);
+	rphy = dev_to_rphy(starget->dev.parent);
+	sas_device = scsih_sas_device_find_by_sas_address(ioc,
+	   rphy->identify.sas_address);
+	if (sas_device)
+		sas_device->starget = NULL;
+
+	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
+ *
+ * Returns 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 MPT2SAS_ADAPTER *ioc;
+	struct MPT2SAS_TARGET *sas_target_priv_data;
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	struct scsi_target *starget;
+	struct _raid_device *raid_device;
+	struct _sas_device *sas_device;
+	unsigned long flags;
+
+	sas_device_priv_data = kzalloc(sizeof(struct scsi_device), 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);
+	} else {
+		/* set TLR bit for SSP devices */
+		if (!(ioc->facts.IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_TLR))
+			goto out;
+		spin_lock_irqsave(&ioc->sas_device_lock, flags);
+		sas_device = scsih_sas_device_find_by_sas_address(ioc,
+		   sas_device_priv_data->sas_target->sas_address);
+		spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+		if (sas_device && sas_device->device_info &
+		    MPI2_SAS_DEVICE_INFO_SSP_TARGET)
+			sas_device_priv_data->flags &= MPT_DEVICE_TLR_ON;
+	}
+
+ out:
+	return 0;
+}
+
+/**
+ * scsih_slave_destroy - device destroy routine
+ * @sdev: scsi device struct
+ *
+ * Returns nothing.
+ */
+static void
+scsih_slave_destroy(struct scsi_device *sdev)
+{
+	struct MPT2SAS_TARGET *sas_target_priv_data;
+	struct scsi_target *starget;
+
+	if (!sdev->hostdata)
+		return;
+
+	starget = scsi_target(sdev);
+	sas_target_priv_data = starget->hostdata;
+	sas_target_priv_data->num_luns--;
+	kfree(sdev->hostdata);
+	sdev->hostdata = NULL;
+}
+
+/**
+ * scsih_display_sata_capabilities - sata capabilities
+ * @ioc: per adapter object
+ * @sas_device: the sas_device object
+ * @sdev: scsi device struct
+ */
+static void
+scsih_display_sata_capabilities(struct MPT2SAS_ADAPTER *ioc, struct _sas_device *sas_device,
+    struct scsi_device *sdev )
+{
+	Mpi2ConfigReply_t mpi_reply;
+	Mpi2SasDevicePage0_t sas_device_pg0;
+	u32 ioc_status;
+	u16 flags;
+	u32 device_info;
+
+	if ((config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
+	    MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, sas_device->handle))) {
+		printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+		    ioc->name, __FILE__, __LINE__, __func__);
+		return;
+	}
+
+	ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
+	    MPI2_IOCSTATUS_MASK;
+	if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
+		printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+		    ioc->name, __FILE__, __LINE__, __func__);
+		return;
+	}
+
+	flags = le16_to_cpu(sas_device_pg0.Flags);
+	device_info = le16_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");
+}
+
+/**
+ * _scsih_get_volume_capabilities - volume capabilities
+ * @ioc: per adapter object
+ * @sas_device: the raid_device object
+ */
+static void
+_scsih_get_volume_capabilities(struct MPT2SAS_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 ((config_get_number_pds(ioc, raid_device->handle, &num_pds)) ||
+	    !num_pds) {
+		printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+		    ioc->name, __FILE__, __LINE__, __func__);
+		return;
+	}
+
+	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) {
+		printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+		    ioc->name, __FILE__, __LINE__, __func__);
+		return;
+	}
+
+	if ((config_get_raid_volume_pg0(ioc, &mpi_reply, vol_pg0,
+	     MPI2_RAID_VOLUME_PGAD_FORM_HANDLE, raid_device->handle, sz))) {
+		printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+		    ioc->name, __FILE__, __LINE__, __func__);
+		kfree(vol_pg0);
+		return;
+	}
+
+	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 (!(config_get_phys_disk_pg0(ioc, &mpi_reply,
+	    &pd_pg0, MPI2_PHYSDISK_PGAD_FORM_PHYSDISKNUM,
+	    vol_pg0->PhysDisk[0].PhysDiskNum))) {
+		if (!(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);
+}
+
+/**
+ * scsih_slave_configure - device configure routine.
+ * @sdev: scsi device struct
+ *
+ * Returns 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 MPT2SAS_ADAPTER *ioc = shost_priv(shost);
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	struct MPT2SAS_TARGET *sas_target_priv_data;
+	struct _sas_device *sas_device;
+	struct _raid_device *raid_device;
+	unsigned long flags;
+	int qdepth;
+	u8 ssp_target = 0;
+	char *ds = "";
+	char *r_level = "";
+
+	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;
+
+	/* raid volume handling */
+	if (sas_target_priv_data->flags & MPT_TARGET_FLAGS_VOLUME) {
+
+		spin_lock_irqsave(&ioc->raid_device_lock, flags);
+		raid_device = _scsih_raid_device_find_by_handle(ioc,
+		     sas_target_priv_data->handle);
+		spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
+		if (!raid_device) {
+			printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+			    ioc->name, __FILE__, __LINE__, __func__);
+			return 0;
+		}
+
+		_scsih_get_volume_capabilities(ioc, raid_device);
+
+		/* RAID Queue Depth Support
+		 * IS volume = underlying qdepth of drive type, either
+		 *    MPT2SAS_SAS_QUEUE_DEPTH or MPT2SAS_SATA_QUEUE_DEPTH
+		 * IM/IME/R10 = 128 (MPT2SAS_RAID_QUEUE_DEPTH)
+		 */
+		if (raid_device->device_info &
+		    MPI2_SAS_DEVICE_INFO_SSP_TARGET) {
+			qdepth = MPT2SAS_SAS_QUEUE_DEPTH;
+			ds = "SSP";
+		} else {
+			qdepth = MPT2SAS_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 = MPT2SAS_RAID_QUEUE_DEPTH;
+			r_level = "RAID1E";
+			break;
+		case MPI2_RAID_VOL_TYPE_RAID1:
+			qdepth = MPT2SAS_RAID_QUEUE_DEPTH;
+			r_level = "RAID1";
+			break;
+		case MPI2_RAID_VOL_TYPE_RAID10:
+			r_level = "RAID10";
+			break;
+		case MPI2_RAID_VOL_TYPE_UNKNOWN:
+		default:
+			qdepth = MPT2SAS_RAID_QUEUE_DEPTH;
+			r_level = "RAIDX";
+			break;
+		}
+
+		sdev_printk(KERN_INFO, sdev, "%s: "
+		    "handle(0x%04x), wwid(0x%016llx), devices(%s-%d)\n",
+		    r_level, raid_device->handle,
+		    (unsigned long long)raid_device->wwid,
+		    ds, raid_device->num_pds);
+		scsih_change_queue_depth(sdev, qdepth);
+		return 0;
+	}
+
+	/* non-raid handling */
+	spin_lock_irqsave(&ioc->sas_device_lock, flags);
+	sas_device = scsih_sas_device_find_by_sas_address(ioc,
+	   sas_device_priv_data->sas_target->sas_address);
+	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+	if (sas_device) {
+		if (sas_target_priv_data->flags &
+		    MPT_TARGET_FLAGS_RAID_COMPONENT) {
+			config_get_volume_handle(ioc, sas_device->handle,
+			    &sas_device->volume_handle);
+			config_get_volume_wwid(ioc, sas_device->volume_handle,
+			    &sas_device->volume_wwid);
+		}
+		if (sas_device->device_info & MPI2_SAS_DEVICE_INFO_SSP_TARGET) {
+			qdepth = MPT2SAS_SAS_QUEUE_DEPTH;
+			ssp_target = 1;
+			ds = "SSP";
+		} else {
+			qdepth = MPT2SAS_SATA_QUEUE_DEPTH;
+			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), device_name(0x%016llx)\n",
+		    ds, sas_device->handle,
+		    (unsigned long long)sas_device->sas_address,
+		    (unsigned long long)sas_device->device_name);
+		sdev_printk(KERN_INFO, sdev, "%s: enclosure_logical_id(0x%016llx), "
+		    "slot(%d)\n", ds, (unsigned long long)
+		    sas_device->enclosure_logical_id, sas_device->slot);
+
+		if (!ssp_target)
+			scsih_display_sata_capabilities(ioc, sas_device, sdev);
+	}
+
+	scsih_change_queue_depth(sdev, qdepth);
+
+	if (ssp_target)
+		sas_read_port_mode_page(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
+ *
+ * Return nothing.
+ */
+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
+ *
+ * Return nothing.
+ */
+static void
+_scsih_response_code(struct MPT2SAS_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;
+	}
+	printk(MPT2SAS_WARN_FMT "response_code(0x%01x): %s\n",
+		ioc->name, response_code, desc);
+}
+
+/**
+ * scsih_tm_done - tm completion routine
+ * @ioc: per adapter object
+ * @smid: system request message index
+ * @VF_ID: virtual function id
+ * @reply: reply message frame(lower 32bit addr)
+ * Context: none.
+ *
+ * The callback handler when using scsih_issue_tm.
+ *
+ * Return nothing.
+ */
+static void
+scsih_tm_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID, u32 reply)
+{
+	MPI2DefaultReply_t * mpi_reply;
+
+	if (ioc->tm_cmds.status == MPT2_CMD_NOT_USED)
+		return;
+	if (ioc->tm_cmds.smid != smid)
+		return;
+	ioc->tm_cmds.status |= MPT2_CMD_COMPLETE;
+	mpi_reply =  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 |= MPT2_CMD_REPLY_VALID;
+	}
+	ioc->tm_cmds.status &= ~MPT2_CMD_PENDING;
+	complete(&ioc->tm_cmds.done);
+}
+
+/**
+ * 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
+scsih_set_tm_flag(struct MPT2SAS_ADAPTER *ioc, u16 handle)
+{
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	struct scsi_device *sdev;
+	u8 skip = 0;
+
+	shost_for_each_device(sdev, ioc->shost) {
+		if (skip)
+			continue;
+		if (!(sas_device_priv_data = sdev->hostdata))
+			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;
+		}
+	}
+}
+
+/**
+ * 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
+scsih_clear_tm_flag(struct MPT2SAS_ADAPTER *ioc, u16 handle)
+{
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	struct scsi_device *sdev;
+	u8 skip = 0;
+
+	shost_for_each_device(sdev, ioc->shost) {
+		if (skip)
+			continue;
+		if (!(sas_device_priv_data = sdev->hostdata))
+			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_issue_tm - main routine for sending tm requests
+ * @ioc: per adapter struct
+ * @device_handle: device handle
+ * @lun: lun number
+ * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in mpi2_init.h)
+ * @smid_task: smid assigned to the task
+ * @timeout: timeout in seconds
+ * Context: The calling function needs to acquire the tm_cmds.mutex
+ *
+ * A generic API for sending task management requests to firmware.
+ *
+ * The ioc->tm_cmds.status flag should be MPT2_CMD_NOT_USED before calling
+ * this API.
+ *
+ * The callback index is set inside `ioc->tm_cb_idx`.
+ *
+ * Return nothing.
+ */
+void
+scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint lun,
+    u8 type, u16 smid_task, ulong timeout)
+{
+	Mpi2SCSITaskManagementRequest_t *mpi_request;
+	Mpi2SCSITaskManagementReply_t *mpi_reply;
+	u16 smid = 0;
+	u32 ioc_state;
+	unsigned long timeleft;
+	u8 VF_ID = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
+	if (ioc->tm_cmds.status != MPT2_CMD_NOT_USED ||
+	    ioc->ioc_reset_in_progress) {
+		spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
+		printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
+		    __func__, ioc->name);
+		return;
+	}
+	spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
+
+	ioc_state = base_get_iocstate(ioc, 0);
+	if (ioc_state & MPI2_DOORBELL_USED) {
+		dhsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "unexpected doorbell "
+		    "active!\n", ioc->name));
+		goto issue_host_reset;
+	}
+
+	if ((ioc_state & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT) {
+		base_fault_info(ioc, ioc_state & MPI2_DOORBELL_DATA_MASK);
+		goto issue_host_reset;
+	}
+
+	if (!(smid = base_get_smid(ioc, ioc->tm_cb_idx))) {
+		printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
+		    ioc->name, __func__);
+		return;
+	}
+
+	dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "sending tm: handle(0x%04x),"
+	    " task_type(0x%02x), smid(%d)\n", ioc->name, handle, type, smid));
+	ioc->tm_cmds.status = MPT2_CMD_PENDING;
+	mpi_request = base_get_msg_frame(ioc, smid);
+	ioc->tm_cmds.smid = 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 = type;
+	mpi_request->TaskMID = cpu_to_le16(smid_task);
+	int_to_scsilun(lun, (struct scsi_lun *)mpi_request->LUN);
+	scsih_set_tm_flag(ioc, handle);
+	base_put_smid_hi_priority(ioc, smid, VF_ID);
+	timeleft = wait_for_completion_timeout(&ioc->tm_cmds.done, timeout*HZ);
+	scsih_clear_tm_flag(ioc, handle);
+	if (!(ioc->tm_cmds.status & MPT2_CMD_COMPLETE)) {
+		printk(MPT2SAS_ERR_FMT "%s: timeout\n",
+		    ioc->name, __func__);
+		if (!(ioc->tm_cmds.status & MPT2_CMD_RESET))
+			goto issue_host_reset;
+	}
+
+	if (ioc->tm_cmds.status & MPT2_CMD_REPLY_VALID) {
+		mpi_reply = ioc->tm_cmds.reply;
+		dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "complete tm: "
+		    "ioc_status(0x%04x), loginfo(0x%08x), term_count(0x%08x)\n",
+		    ioc->name, 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);
+	}
+	return;
+ issue_host_reset:
+	base_hard_reset_handler(ioc, CAN_SLEEP, SOFT_RESET);
+}
+
+/**
+ * scsih_abort - eh threads main abort routine
+ * @sdev: scsi device struct
+ *
+ * Returns SUCCESS if command aborted else FAILED
+ */
+static int
+scsih_abort(struct scsi_cmnd *scmd)
+{
+	struct MPT2SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	u16 smid;
+	u16 handle;
+	int r;
+	struct scsi_cmnd *scmd_lookup;
+
+	printk(MPT2SAS_INFO_FMT "attempting task abort! scmd(%p)\n",
+	    ioc->name, scmd);
+	scsi_print_command(scmd);
+
+	sas_device_priv_data = scmd->device->hostdata;
+	if (!sas_device_priv_data || !sas_device_priv_data->sas_target) {
+		printk(MPT2SAS_INFO_FMT "device been deleted! scmd(%p)\n",
+		    ioc->name, scmd);
+		scmd->result = DID_NO_CONNECT << 16;
+		scmd->scsi_done(scmd);
+		r = SUCCESS;
+		goto out;
+	}
+
+	/* search for the command */
+	if(!(smid = _scsih_scsi_lookup_find_by_scmd(ioc, 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;
+	}
+
+	mutex_lock(&ioc->tm_cmds.mutex);
+	handle = sas_device_priv_data->sas_target->handle;
+	scsih_issue_tm(ioc, handle, sas_device_priv_data->lun,
+	    MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK, smid, 30);
+
+	/* sanity check - see whether command actually completed */
+	scmd_lookup = _scsih_scsi_lookup_get(ioc, smid);
+	if (scmd_lookup && (scmd_lookup->serial_number == scmd->serial_number))
+		r = FAILED;
+	else
+		r = SUCCESS;
+	ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
+	mutex_unlock(&ioc->tm_cmds.mutex);
+
+ out:
+	printk(MPT2SAS_INFO_FMT "task abort: %s scmd(%p)\n",
+	    ioc->name, ((r == SUCCESS) ? "SUCCESS" : "FAILED" ), scmd);
+	return r;
+}
+
+
+/**
+ * scsih_dev_reset - eh threads main device reset routine
+ * @sdev: scsi device struct
+ *
+ * Returns SUCCESS if command aborted else FAILED
+ */
+static int
+scsih_dev_reset(struct scsi_cmnd *scmd)
+{
+	struct MPT2SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	struct _sas_device *sas_device;
+	unsigned long flags;
+	u16	handle;
+	int r;
+
+	printk(MPT2SAS_INFO_FMT "attempting target reset! scmd(%p)\n",
+	    ioc->name, scmd);
+	scsi_print_command(scmd);
+
+	sas_device_priv_data = scmd->device->hostdata;
+	if (!sas_device_priv_data || !sas_device_priv_data->sas_target) {
+		printk(MPT2SAS_INFO_FMT "device been deleted! scmd(%p)\n",
+		    ioc->name, scmd);
+		scmd->result = DID_NO_CONNECT << 16;
+		scmd->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) {
+		spin_lock_irqsave(&ioc->sas_device_lock, flags);
+		sas_device = _scsih_sas_device_find_by_handle(ioc,
+		   sas_device_priv_data->sas_target->handle);
+		if (sas_device)
+			handle = sas_device->volume_handle;
+		spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+	}
+	else
+		handle = sas_device_priv_data->sas_target->handle;
+
+	if (!handle) {
+		scmd->result = DID_RESET << 16;
+		r = FAILED;
+		goto out;
+	}
+
+	mutex_lock(&ioc->tm_cmds.mutex);
+	scsih_issue_tm(ioc, handle, 0,
+	    MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0, 30);
+
+	/*
+	 *  sanity check see whether all commands to this target been
+	 *  completed
+	 */
+	if (_scsih_scsi_lookup_find_by_target(ioc, scmd->device->id,
+	    scmd->device->channel))
+		r = FAILED;
+	else
+		r = SUCCESS;
+	ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
+	mutex_unlock(&ioc->tm_cmds.mutex);
+
+ out:
+	printk(MPT2SAS_INFO_FMT "target reset: %s scmd(%p)\n",
+	    ioc->name, ((r == SUCCESS) ? "SUCCESS" : "FAILED" ), scmd);
+	return r;
+}
+
+/**
+ * scsih_abort - eh threads main host reset routine
+ * @sdev: scsi device struct
+ *
+ * Returns SUCCESS if command aborted else FAILED
+ */
+static int
+scsih_host_reset(struct scsi_cmnd *scmd)
+{
+	struct MPT2SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
+	int r, retval;
+
+	printk(MPT2SAS_INFO_FMT "attempting host reset! scmd(%p)\n",
+	    ioc->name, scmd);
+	scsi_print_command(scmd);
+
+	retval = base_hard_reset_handler(ioc, CAN_SLEEP, SOFT_RESET);
+	r = (retval < 0 ) ? FAILED : SUCCESS;
+	printk(MPT2SAS_INFO_FMT "host reset: %s scmd(%p)\n",
+	    ioc->name, ((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.
+ *
+ * Return nothing.
+ */
+static void
+_scsih_fw_event_add(struct MPT2SAS_ADAPTER *ioc, struct fw_event_work *fw_event)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ioc->fw_event_lock, flags);
+	list_add_tail(&fw_event->list, &ioc->fw_event_list);
+	INIT_DELAYED_WORK(&fw_event->work, _firmware_event_work);
+	queue_delayed_work(ioc->firmware_event_thread, &fw_event->work, 1);
+	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
+}
+
+/**
+ * _scsih_fw_event_free - delete fw_event
+ * @ioc: per adapter object
+ * @fw_event: object describing the event
+ * Context: This function will acquire ioc->fw_event_lock.
+ *
+ * This removes firmware event object from link list, frees associated memory.
+ *
+ * Return nothing.
+ */
+static void
+_scsih_fw_event_free(struct MPT2SAS_ADAPTER *ioc, struct fw_event_work
+    *fw_event)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ioc->fw_event_lock, flags);
+	list_del(&fw_event->list);
+	kfree(fw_event->event_data);
+	kfree(fw_event);
+	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
+}
+
+/**
+ * _scsih_fw_event_add - requeue an event
+ * @ioc: per adapter object
+ * @fw_event: object describing the event
+ * Context: This function will acquire ioc->fw_event_lock.
+ *
+ * Return nothing.
+ */
+static void
+_scsih_fw_event_requeue(struct MPT2SAS_ADAPTER *ioc, struct fw_event_work
+    *fw_event, unsigned long delay)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&ioc->fw_event_lock, flags);
+	queue_delayed_work(ioc->firmware_event_thread, &fw_event->work, delay);
+	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
+}
+
+/**
+ * _scsih_fw_event_off - turn flag off preventing event handling
+ * @ioc: per adapter object
+ *
+ * Used to prevent handling of firmware events during adapter reset
+ * driver unload.
+ *
+ * Return nothing.
+ */
+static void
+_scsih_fw_event_off(struct MPT2SAS_ADAPTER *ioc)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ioc->fw_event_lock, flags);
+	ioc->fw_events_off = 1;
+	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
+
+}
+
+/**
+ * _scsih_fw_event_on - turn flag on allowing firmware event handling
+ * @ioc: per adapter object
+ *
+ * Returns nothing.
+ */
+static void
+_scsih_fw_event_on(struct MPT2SAS_ADAPTER *ioc)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ioc->fw_event_lock, flags);
+	ioc->fw_events_off = 0;
+	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
+}
+
+/**
+ * _scsih_ublock_io_device - set the device state to SDEV_RUNNING
+ * @ioc: per adapter object
+ * @handle: device handle
+ *
+ * During device pull we need to appropiately set the sdev state.
+ */
+static void
+_scsih_ublock_io_device(struct MPT2SAS_ADAPTER *ioc, u16 handle)
+{
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	struct scsi_device *sdev;
+
+	shost_for_each_device(sdev, ioc->shost) {
+		if (!(sas_device_priv_data = sdev->hostdata))
+			continue;
+		if (!sas_device_priv_data->block)
+			continue;
+		if (sas_device_priv_data->sas_target->handle == handle) {
+			dewtprintk(ioc, sdev_printk(KERN_INFO, sdev,
+			    MPT2SAS_INFO_FMT "SDEV_RUNNING: "
+			    "handle(0x%04x)\n", ioc->name, handle));
+			sas_device_priv_data->block = 0;
+			scsi_device_set_state(sdev, SDEV_RUNNING);
+		}
+	}
+}
+
+/**
+ * _scsih_block_io_device - set the device state to SDEV_BLOCK
+ * @ioc: per adapter object
+ * @handle: device handle
+ *
+ * During device pull we need to appropiately set the sdev state.
+ */
+static void
+_scsih_block_io_device(struct MPT2SAS_ADAPTER *ioc, u16 handle)
+{
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	struct scsi_device *sdev;
+
+	shost_for_each_device(sdev, ioc->shost) {
+		if (!(sas_device_priv_data = sdev->hostdata))
+			continue;
+		if (sas_device_priv_data->block)
+			continue;
+		if (sas_device_priv_data->sas_target->handle == handle) {
+			dewtprintk(ioc, sdev_printk(KERN_INFO, sdev,
+			    MPT2SAS_INFO_FMT "SDEV_BLOCK: "
+			    "handle(0x%04x)\n", ioc->name, handle));
+			sas_device_priv_data->block = 1;
+			scsi_device_set_state(sdev, SDEV_BLOCK);
+		}
+	}
+}
+
+/**
+ * _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 MPT2SAS_ADAPTER *ioc,
+    struct _sas_node *sas_expander)
+{
+	struct _sas_port *mpt2sas_port;
+	struct _sas_device *sas_device;
+	struct _sas_node *expander_sibling;
+	unsigned long flags;
+
+	if (!sas_expander)
+		return;
+
+	list_for_each_entry(mpt2sas_port,
+	   &sas_expander->sas_port_list, port_list) {
+		if (mpt2sas_port->remote_identify.device_type ==
+		    SAS_END_DEVICE) {
+			spin_lock_irqsave(&ioc->sas_device_lock, flags);
+			sas_device = scsih_sas_device_find_by_sas_address(ioc,
+			   mpt2sas_port->remote_identify.sas_address);
+			spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+			if (!sas_device)
+				continue;
+			_scsih_block_io_device(ioc, sas_device->handle);
+		}
+	}
+
+	list_for_each_entry(mpt2sas_port,
+	   &sas_expander->sas_port_list, port_list) {
+
+		if (mpt2sas_port->remote_identify.device_type ==
+		    MPI2_SAS_DEVICE_INFO_EDGE_EXPANDER ||
+		    mpt2sas_port->remote_identify.device_type ==
+		    MPI2_SAS_DEVICE_INFO_FANOUT_EXPANDER) {
+
+			spin_lock_irqsave(&ioc->sas_node_lock, flags);
+			expander_sibling = scsih_expander_find_by_sas_address(
+			    ioc, mpt2sas_port->remote_identify.sas_address);
+			spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
+			_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 MPT2SAS_ADAPTER *ioc,
+    Mpi2EventDataSasTopologyChangeList_t *event_data)
+{
+	int i;
+	u16 handle;
+	u16 reason_code;
+	u8 phy_number;
+
+	for (i = 0; i < event_data->NumEntries; i++) {
+		handle = le16_to_cpu(event_data->PHY[i].AttachedDevHandle);
+		if (!handle)
+			continue;
+		phy_number = event_data->StartPhyNum + i;
+		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_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 recieves 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.
+ *
+ * Return nothing.
+ */
+static void
+_scsih_check_topo_delete_events(struct MPT2SAS_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;
+
+	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
+	 || event_data->ExpStatus == MPI2_EVENT_SAS_TOPO_ES_NOT_RESPONDING) {
+		spin_lock_irqsave(&ioc->sas_node_lock, flags);
+		sas_expander = scsih_expander_find_by_handle(ioc, expander_handle);
+		spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
+		_scsih_block_io_to_children_attached_to_ex(ioc, sas_expander);
+	} 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 = 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, printk(MPT2SAS_DEBUG_FMT
+				    "setting ignoring flag\n", ioc->name));
+				fw_event->ignore = 1;
+			}
+		}
+	}
+	spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
+}
+
+/**
+ * _scsih_queue_rescan - queue a topology rescan from user context
+ * @ioc: per adapter object
+ *
+ * Return nothing.
+ */
+static void
+_scsih_queue_rescan(struct MPT2SAS_ADAPTER *ioc)
+{
+	struct fw_event_work *fw_event;
+
+	if (ioc->wait_for_port_enable_to_complete)
+		return;
+	fw_event = kzalloc(sizeof(struct fw_event_work), GFP_ATOMIC);
+	if (!fw_event)
+		return;
+	fw_event->event = MPT2SAS_RESCAN_AFTER_HOST_RESET;
+	fw_event->ioc = ioc;
+	_scsih_fw_event_add(ioc, fw_event);
+}
+
+/**
+ * _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.
+ *
+ * Return nothing.
+ */
+static void
+_scsih_flush_running_cmds(struct MPT2SAS_ADAPTER *ioc)
+{
+	struct scsi_cmnd * scmd;
+	u16 smid;
+
+	for (smid = 1; smid <= ioc->request_depth; smid++) {
+		if (!(scmd = _scsih_scsi_lookup_getclear(ioc, smid)))
+			continue;
+		dtmprintk(ioc, sdev_printk(KERN_INFO, scmd->device,
+		    MPT2SAS_INFO_FMT "completing cmds: channel(%d), id(%d), "
+		    "sc(%p), smid(%d)\n", ioc->name, scmd->device->channel,
+		    scmd->device->id, scmd, smid));
+		base_free_smid(ioc, smid);
+		scsi_dma_unmap(scmd);
+		scmd->result = DID_RESET << 16;
+		scmd->scsi_done(scmd);
+	}
+}
+
+/**
+ * scsih_reset_handler - reset callback handler (for scsih)
+ * @ioc: per adapter object
+ * @reset_phase: phase
+ *
+ * The handler for doing any required cleanup or initialization.
+ *
+ * The reset phase can be MPT2_IOC_PRE_RESET, MPT2_IOC_AFTER_RESET,
+ * MPT2_IOC_DONE_RESET
+ *
+ * Return nothing.
+ */
+void
+scsih_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
+{
+	switch(reset_phase) {
+	case MPT2_IOC_PRE_RESET:
+		dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
+		    "MPT2_IOC_PRE_RESET\n", ioc->name, __func__));
+		_scsih_fw_event_off(ioc);
+		break;
+	case MPT2_IOC_AFTER_RESET:
+		dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
+		    "MPT2_IOC_AFTER_RESET\n", ioc->name, __func__));
+		if (ioc->tm_cmds.status & MPT2_CMD_PENDING) {
+			ioc->tm_cmds.status |= MPT2_CMD_RESET;
+			base_free_smid(ioc, ioc->tm_cmds.smid);
+			complete(&ioc->tm_cmds.done);
+		}
+		_scsih_fw_event_on(ioc);
+		_scsih_flush_running_cmds(ioc);
+		break;
+	case MPT2_IOC_DONE_RESET:
+		dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
+		    "MPT2_IOC_DONE_RESET\n", ioc->name, __func__));
+		_scsih_queue_rescan(ioc);
+		break;
+	}
+}
+
+/**
+ * scsih_qcmd - main scsi request entry point
+ * @scmd: pointer to scsi command object
+ * @done: function pointer to be invoked on completion
+ *
+ * The callback index is set inside `ioc->scsi_io_cb_idx`.
+ *
+ * Returns 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_cmnd *scmd, void (*done)(struct scsi_cmnd *))
+{
+	struct MPT2SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	struct MPT2SAS_TARGET *sas_target_priv_data;
+	Mpi2SCSIIORequest_t *mpi_request;
+	u32 mpi_control;
+	u16 smid;
+	unsigned long flags;
+
+	scmd->scsi_done = done;
+	if (!(sas_device_priv_data = scmd->device->hostdata)) {
+		scmd->result = DID_NO_CONNECT << 16;
+		scmd->scsi_done(scmd);
+		return 0;
+	}
+
+	sas_target_priv_data = sas_device_priv_data->sas_target;
+	if (!sas_target_priv_data || sas_target_priv_data->handle ==
+	    MPT2SAS_INVALID_DEVICE_HANDLE || sas_target_priv_data->deleted) {
+		scmd->result = DID_NO_CONNECT << 16;
+		scmd->scsi_done(scmd);
+		return 0;
+	}
+
+	/* see if we are busy with task managment stuff */
+	spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
+	if (sas_target_priv_data->tm_busy ||
+	    ioc->ioc_reset_in_progress || ioc->ioc_link_reset_in_progress) {
+		spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+	spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
+
+	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 */
+	if (!(sas_device_priv_data->flags & MPT_DEVICE_FLAGS_INIT)) {
+		if (scmd->device->tagged_supported) {
+			if (scmd->device->ordered_tags)
+				mpi_control |= MPI2_SCSIIO_CONTROL_ORDEREDQ;
+			else
+				mpi_control |= MPI2_SCSIIO_CONTROL_SIMPLEQ;
+		} else
+/* MPI Revision I (UNIT = 0xA) - removed MPI2_SCSIIO_CONTROL_UNTAGGED */
+//			mpi_control |= MPI2_SCSIIO_CONTROL_UNTAGGED;
+			mpi_control |= (0x500);
+
+	} else
+		mpi_control |= MPI2_SCSIIO_CONTROL_SIMPLEQ;
+
+	if ((sas_device_priv_data->flags & MPT_DEVICE_TLR_ON))
+		mpi_control |= MPI2_SCSIIO_CONTROL_TLR_ON;
+
+	if (!(smid = base_get_smid(ioc, ioc->scsi_io_cb_idx))) {
+		printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
+		    ioc->name, __func__);
+		goto out;
+	}
+	mpi_request = base_get_msg_frame(ioc, smid);
+	memset(mpi_request, 0, sizeof(Mpi2SCSIIORequest_t));
+	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(sas_device_priv_data->sas_target->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 =
+	    (u32)base_get_sense_buffer_dma(ioc, smid);
+	mpi_request->SGLOffset0 = offsetof(Mpi2SCSIIORequest_t, SGL) / 4;
+	mpi_request->SGLFlags = cpu_to_le16(MPI2_SCSIIO_SGLFLAGS_TYPE_MPI +
+	    MPI2_SCSIIO_SGLFLAGS_SYSTEM_ADDR);
+
+	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) {
+		base_build_zero_len_sge(ioc, &mpi_request->SGL);
+	} else {
+		if (_scsih_build_scatter_gather(ioc, scmd, smid)) {
+			base_free_smid(ioc, smid);
+			goto out;
+		}
+	}
+
+	_scsih_scsi_lookup_set(ioc, smid, scmd);
+	base_put_smid_scsi_io(ioc, smid, 0,
+	    sas_device_priv_data->sas_target->handle);
+	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
+ *
+ * Return nothing.
+ */
+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];
+	}
+}
+
+#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
+/**
+ * _scsih_scsi_ioc_info - translated non-succesfull SCSI_IO request
+ * @ioc: per adapter object
+ * @scmd: pointer to scsi command object
+ * @mpi_reply: reply mf payload returned from firmware
+ *
+ * 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
+ *
+ * Return nothing.
+ */
+static void
+_scsih_scsi_ioc_info(struct MPT2SAS_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;
+
+	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;
+	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);
+	printk(MPT2SAS_WARN_FMT "\tdev handle(0x%04x), "
+	    "ioc_status(%s)(0x%04x), smid(0x%04x)\n", ioc->name,
+	    le16_to_cpu(mpi_reply->DevHandle), desc_ioc_state,
+		ioc_status, smid);
+	printk(MPT2SAS_WARN_FMT "\trequest_len(%d), underflow(%d), "
+	    "resid(%d)\n", ioc->name, scsi_bufflen(scmd), scmd->underflow,
+	    scsi_get_resid(scmd));
+	printk(MPT2SAS_WARN_FMT "\ttag(%d), transfer_count(%d), "
+	    "sc->result(0x%08x)\n", ioc->name, le16_to_cpu(mpi_reply->TaskTag),
+	    le32_to_cpu(mpi_reply->TransferCount), scmd->result);
+	printk(MPT2SAS_WARN_FMT "\tscsi_status(%s)(0x%02x), "
+	    "scsi_state(%s)(0x%02x)\n", ioc->name, 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);
+		printk(MPT2SAS_WARN_FMT "\t[sense_key,asc,ascq]: "
+		    "[0x%02x,0x%02x,0x%02x]\n", ioc->name, data.skey,
+		    data.asc, data.ascq);
+	}
+
+	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[3]);
+	}
+}
+#endif
+
+/**
+ * _scsih_smart_predicted_fault - illuminate Fault LED
+ * @ioc: per adapter object
+ * @handle: device handle
+ *
+ * Return nothing.
+ */
+static void
+_scsih_smart_predicted_fault(struct MPT2SAS_ADAPTER *ioc, u16 handle)
+{
+	Mpi2SepReply_t mpi_reply;
+	Mpi2SepRequest_t mpi_request;
+	struct scsi_target *starget;
+	struct MPT2SAS_TARGET *sas_target_priv_data;
+	Mpi2EventNotificationReply_t *event_reply;
+	Mpi2EventDataSasDeviceStatusChange_t *event_data;
+	struct _sas_device *sas_device;
+	ssize_t sz;
+	__le64 *sas_address;
+	unsigned long flags;
+
+	/* only handle non-raid devices */
+	spin_lock_irqsave(&ioc->sas_device_lock, flags);
+	sas_device = _scsih_sas_device_find_by_handle(ioc, handle);
+	if (!sas_device) {
+		spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+		return;
+	}
+	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))) {
+		spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+		return;
+	}
+	starget_printk(KERN_WARNING, starget, "predicted fault\n");
+	spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+
+	if (ioc->pdev->subsystem_vendor == PCI_VENDOR_ID_IBM) {
+		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 =
+		    MPI2_SEP_REQ_SLOTSTATUS_PREDICTED_FAULT;
+		mpi_request.DevHandle = cpu_to_le16(handle);
+		mpi_request.Flags = MPI2_SEP_REQ_FLAGS_DEVHANDLE_ADDRESS;
+		if ((base_scsi_enclosure_processor(ioc, &mpi_reply,
+		    &mpi_request)) != 0) {
+			printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+			    ioc->name, __FILE__, __LINE__, __func__);
+			return;
+		}
+
+		if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo) {
+			dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
+			    "enclosure_processor: ioc_status (0x%04x), "
+			    "loginfo(0x%08x)\n", ioc->name,
+			    le16_to_cpu(mpi_reply.IOCStatus),
+			    le32_to_cpu(mpi_reply.IOCLogInfo)));
+			return;
+		}
+	}
+
+	/* insert into event log */
+	sz = offsetof(Mpi2EventNotificationReply_t, EventData) +
+	     sizeof(Mpi2EventDataSasDeviceStatusChange_t);
+	event_reply = kzalloc(sz, GFP_KERNEL);
+	if (!event_reply) {
+		printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+		    ioc->name, __FILE__, __LINE__, __func__);
+		return;
+	}
+
+	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);
+	sas_address = (__le64 *)&event_data->SASAddress;
+	*sas_address = cpu_to_le64(sas_target_priv_data->sas_address);
+
+	ctl_add_to_event_log(ioc, event_reply);
+	kfree(event_reply);
+}
+
+/**
+ * scsih_io_done - scsi request callback
+ * @ioc: per adapter object
+ * @smid: system request message index
+ * @VF_ID: virtual function id
+ * @reply: reply message frame(lower 32bit addr)
+ *
+ * Callback handler when using scsih_qcmd.
+ *
+ * Return nothing.
+ */
+static void
+scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID, u32 reply)
+{
+	Mpi2SCSIIORequest_t *mpi_request;
+	Mpi2SCSIIOReply_t *mpi_reply = base_get_reply_virt_addr(ioc, reply);
+	struct scsi_cmnd * scmd;
+	u16 ioc_status;
+	u32 xfer_cnt;
+	u8 scsi_state;
+	u8 scsi_status;
+	u32 log_info;
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	u32 response_code;
+
+	scmd = _scsih_scsi_lookup_getclear(ioc, smid);
+	if (scmd == NULL)
+		return;
+
+	mpi_request = 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;
+	}
+
+	/* turning off TLR */
+	if (!sas_device_priv_data->tlr_snoop_check) {
+		sas_device_priv_data->tlr_snoop_check++;
+		if (sas_device_priv_data->flags & MPT_DEVICE_TLR_ON) {
+			response_code = (le32_to_cpu(mpi_reply->ResponseInfo)
+			    >> 24);
+			if (response_code ==
+			    MPI2_SCSITASKMGMT_RSP_INVALID_FRAME)
+				sas_device_priv_data->flags &=
+				    ~MPT_DEVICE_TLR_ON;
+		}
+	}
+
+	xfer_cnt = le32_to_cpu(mpi_reply->TransferCount);
+	scsi_set_resid(scmd, scsi_bufflen(scmd) - xfer_cnt);
+	ioc_status = le16_to_cpu(mpi_reply->IOCStatus);
+	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_state = mpi_reply->SCSIState;
+	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 = base_get_sense_buffer(ioc, smid);
+		memcpy(scmd->sense_buffer, sense_data,
+		    le32_to_cpu(mpi_reply->SenseCount));
+		_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));
+	}
+
+	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 (log_info == 0x31170000 /* NEXUS_LOSS */) {
+			scmd->result = (DID_BUS_BUSY << 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;
+			scmd->result = (DRIVER_SENSE << 24) |
+			    SAM_STAT_CHECK_CONDITION;
+			scmd->sense_buffer[0] = 0x70;
+			scmd->sense_buffer[2] = ILLEGAL_REQUEST;
+			scmd->sense_buffer[12] = 0x20;
+			scmd->sense_buffer[13] = 0;
+		}
+		break;
+
+	case MPI2_IOCSTATUS_SCSI_DATA_OVERRUN:
+		scsi_set_resid(scmd, 0);
+	case MPI2_IOCSTATUS_SCSI_RECOVERED_ERROR:
+	case MPI2_IOCSTATUS_SUCCESS:
+		scmd->result = (DID_OK << 16) | scsi_status;
+		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;
+		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:
+	default:
+		scmd->result = DID_SOFT_ERROR << 16;
+		break;
+
+	}
+
+#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
+	if (scmd->result && (ioc->logging_level & MPT_DEBUG_REPLY))
+		_scsih_scsi_ioc_info(ioc , scmd, mpi_reply, smid);
+#endif
+
+ out:
+	scsi_dma_unmap(scmd);
+	scmd->scsi_done(scmd);
+}
+
+/**
+ * _scsih_link_change - process phy link changes
+ * @ioc: per adapter object
+ * @handle: phy handle
+ * @attached_handle: valid for devices attached to link
+ * @phy_number: phy number
+ * @link_rate: new link rate
+ * Context: user.
+ *
+ * Return nothing.
+ */
+static void
+_scsih_link_change(struct MPT2SAS_ADAPTER *ioc, u16 handle, u16 attached_handle,
+   u8 phy_number, u8 link_rate)
+{
+	transport_update_phy_link_change(ioc, handle, attached_handle,
+	    phy_number, link_rate);
+}
+
+/**
+ * _scsih_sas_host_refresh - refreshing sas host object contents
+ * @ioc: per adapter object
+ * @update: update link information
+ * 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.
+ *
+ * Return nothing.
+ */
+static void
+_scsih_sas_host_refresh(struct MPT2SAS_ADAPTER *ioc, u8 update)
+{
+	u16 sz;
+	u16 ioc_status;
+	int i;
+	Mpi2ConfigReply_t mpi_reply;
+	Mpi2SasIOUnitPage0_t *sas_iounit_pg0 = NULL;
+
+	dtmprintk(ioc, printk(MPT2SAS_INFO_FMT
+	    "updating handles for sas_host(0x%016llx)\n",
+	    ioc->name, (unsigned long long)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) {
+		printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+		    ioc->name, __FILE__, __LINE__, __func__);
+		return;
+	}
+	if (!(config_get_sas_iounit_pg0(ioc, &mpi_reply, sas_iounit_pg0, sz))) {
+		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++) {
+			ioc->sas_hba.phy[i].handle =
+			    le16_to_cpu(sas_iounit_pg0->PhyData[i].ControllerDevHandle);
+			if (update)
[… more lines in the raw message]

Lines of this file are not shown. View the raw message.