Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 2305 insertions, 0 deletions

diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
new file mode 100644
index 000000000..6cb9cca95
--- /dev/null
+++ b/drivers/scsi/3w-9xxx.c
@@ -0,0 +1,2305 @@
+/*
+   3w-9xxx.c -- 3ware 9000 Storage Controller device driver for Linux.
+
+   Written By: Adam Radford <aradford@gmail.com>
+   Modifications By: Tom Couch
+
+   Copyright (C) 2004-2009 Applied Micro Circuits Corporation.
+   Copyright (C) 2010 LSI Corporation.
+
+   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; version 2 of the License.
+
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+   Bugs/Comments/Suggestions should be mailed to:
+   aradford@gmail.com
+
+   Note: This version of the driver does not contain a bundled firmware
+         image.
+
+   History
+   -------
+   2.26.02.000 - Driver cleanup for kernel submission.
+   2.26.02.001 - Replace schedule_timeout() calls with msleep().
+   2.26.02.002 - Add support for PAE mode.
+                 Add lun support.
+                 Fix twa_remove() to free irq handler/unregister_chrdev()
+                 before shutting down card.
+                 Change to new 'change_queue_depth' api.
+                 Fix 'handled=1' ISR usage, remove bogus IRQ check.
+                 Remove un-needed eh_abort handler.
+                 Add support for embedded firmware error strings.
+   2.26.02.003 - Correctly handle single sgl's with use_sg=1.
+   2.26.02.004 - Add support for 9550SX controllers.
+   2.26.02.005 - Fix use_sg == 0 mapping on systems with 4GB or higher.
+   2.26.02.006 - Fix 9550SX pchip reset timeout.
+                 Add big endian support.
+   2.26.02.007 - Disable local interrupts during kmap/unmap_atomic().
+   2.26.02.008 - Free irq handler in __twa_shutdown().
+                 Serialize reset code.
+                 Add support for 9650SE controllers.
+   2.26.02.009 - Fix dma mask setting to fallback to 32-bit if 64-bit fails.
+   2.26.02.010 - Add support for 9690SA controllers.
+   2.26.02.011 - Increase max AENs drained to 256.
+                 Add MSI support and "use_msi" module parameter.
+                 Fix bug in twa_get_param() on 4GB+.
+                 Use pci_resource_len() for ioremap().
+   2.26.02.012 - Add power management support.
+   2.26.02.013 - Fix bug in twa_load_sgl().
+   2.26.02.014 - Force 60 second timeout default.
+*/
+
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/moduleparam.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/time.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <linux/uaccess.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_cmnd.h>
+#include "3w-9xxx.h"
+
+/* Globals */
+#define TW_DRIVER_VERSION "2.26.02.014"
+static DEFINE_MUTEX(twa_chrdev_mutex);
+static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT];
+static unsigned int twa_device_extension_count;
+static int twa_major = -1;
+extern struct timezone sys_tz;
+
+/* Module parameters */
+MODULE_AUTHOR ("LSI");
+MODULE_DESCRIPTION ("3ware 9000 Storage Controller Linux Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(TW_DRIVER_VERSION);
+
+static int use_msi = 0;
+module_param(use_msi, int, S_IRUGO);
+MODULE_PARM_DESC(use_msi, "Use Message Signaled Interrupts.  Default: 0");
+
+/* Function prototypes */
+static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header);
+static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id);
+static char *twa_aen_severity_lookup(unsigned char severity_code);
+static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id);
+static long twa_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
+static int twa_chrdev_open(struct inode *inode, struct file *file);
+static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host);
+static void twa_free_request_id(TW_Device_Extension *tw_dev,int request_id);
+static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id);
+static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
+			      u32 set_features, unsigned short current_fw_srl,
+			      unsigned short current_fw_arch_id,
+			      unsigned short current_fw_branch,
+			      unsigned short current_fw_build,
+			      unsigned short *fw_on_ctlr_srl,
+			      unsigned short *fw_on_ctlr_arch_id,
+			      unsigned short *fw_on_ctlr_branch,
+			      unsigned short *fw_on_ctlr_build,
+			      u32 *init_connect_result);
+static void twa_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length);
+static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds);
+static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds);
+static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal);
+static int twa_reset_device_extension(TW_Device_Extension *tw_dev);
+static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset);
+static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id,
+				   unsigned char *cdb, int use_sg,
+				   TW_SG_Entry *sglistarg);
+static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id);
+static char *twa_string_lookup(twa_message_type *table, unsigned int aen_code);
+
+/* Functions */
+
+/* Show some statistics about the card */
+static ssize_t twa_show_stats(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *host = class_to_shost(dev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+	unsigned long flags = 0;
+	ssize_t len;
+
+	spin_lock_irqsave(tw_dev->host->host_lock, flags);
+	len = snprintf(buf, PAGE_SIZE, "3w-9xxx Driver version: %s\n"
+		       "Current commands posted:   %4d\n"
+		       "Max commands posted:       %4d\n"
+		       "Current pending commands:  %4d\n"
+		       "Max pending commands:      %4d\n"
+		       "Last sgl length:           %4d\n"
+		       "Max sgl length:            %4d\n"
+		       "Last sector count:         %4d\n"
+		       "Max sector count:          %4d\n"
+		       "SCSI Host Resets:          %4d\n"
+		       "AEN's:                     %4d\n",
+		       TW_DRIVER_VERSION,
+		       tw_dev->posted_request_count,
+		       tw_dev->max_posted_request_count,
+		       tw_dev->pending_request_count,
+		       tw_dev->max_pending_request_count,
+		       tw_dev->sgl_entries,
+		       tw_dev->max_sgl_entries,
+		       tw_dev->sector_count,
+		       tw_dev->max_sector_count,
+		       tw_dev->num_resets,
+		       tw_dev->aen_count);
+	spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+	return len;
+} /* End twa_show_stats() */
+
+/* Create sysfs 'stats' entry */
+static struct device_attribute twa_host_stats_attr = {
+	.attr = {
+		.name =		"stats",
+		.mode =		S_IRUGO,
+	},
+	.show = twa_show_stats
+};
+
+/* Host attributes initializer */
+static struct attribute *twa_host_attrs[] = {
+	&twa_host_stats_attr.attr,
+	NULL,
+};
+
+ATTRIBUTE_GROUPS(twa_host);
+
+/* File operations struct for character device */
+static const struct file_operations twa_fops = {
+	.owner		= THIS_MODULE,
+	.unlocked_ioctl	= twa_chrdev_ioctl,
+	.open		= twa_chrdev_open,
+	.release	= NULL,
+	.llseek		= noop_llseek,
+};
+
+/*
+ * The controllers use an inline buffer instead of a mapped SGL for small,
+ * single entry buffers.  Note that we treat a zero-length transfer like
+ * a mapped SGL.
+ */
+static bool twa_command_mapped(struct scsi_cmnd *cmd)
+{
+	return scsi_sg_count(cmd) != 1 ||
+		scsi_bufflen(cmd) >= TW_MIN_SGL_LENGTH;
+}
+
+/* This function will complete an aen request from the isr */
+static int twa_aen_complete(TW_Device_Extension *tw_dev, int request_id)
+{
+	TW_Command_Full *full_command_packet;
+	TW_Command *command_packet;
+	TW_Command_Apache_Header *header;
+	unsigned short aen;
+	int retval = 1;
+
+	header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
+	tw_dev->posted_request_count--;
+	aen = le16_to_cpu(header->status_block.error);
+	full_command_packet = tw_dev->command_packet_virt[request_id];
+	command_packet = &full_command_packet->command.oldcommand;
+
+	/* First check for internal completion of set param for time sync */
+	if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) {
+		/* Keep reading the queue in case there are more aen's */
+		if (twa_aen_read_queue(tw_dev, request_id))
+			goto out2;
+		else {
+			retval = 0;
+			goto out;
+		}
+	}
+
+	switch (aen) {
+	case TW_AEN_QUEUE_EMPTY:
+		/* Quit reading the queue if this is the last one */
+		break;
+	case TW_AEN_SYNC_TIME_WITH_HOST:
+		twa_aen_sync_time(tw_dev, request_id);
+		retval = 0;
+		goto out;
+	default:
+		twa_aen_queue_event(tw_dev, header);
+
+		/* If there are more aen's, keep reading the queue */
+		if (twa_aen_read_queue(tw_dev, request_id))
+			goto out2;
+		else {
+			retval = 0;
+			goto out;
+		}
+	}
+	retval = 0;
+out2:
+	tw_dev->state[request_id] = TW_S_COMPLETED;
+	twa_free_request_id(tw_dev, request_id);
+	clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
+out:
+	return retval;
+} /* End twa_aen_complete() */
+
+/* This function will drain aen queue */
+static int twa_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
+{
+	int request_id = 0;
+	unsigned char cdb[TW_MAX_CDB_LEN];
+	TW_SG_Entry sglist[1];
+	int finished = 0, count = 0;
+	TW_Command_Full *full_command_packet;
+	TW_Command_Apache_Header *header;
+	unsigned short aen;
+	int first_reset = 0, queue = 0, retval = 1;
+
+	if (no_check_reset)
+		first_reset = 0;
+	else
+		first_reset = 1;
+
+	full_command_packet = tw_dev->command_packet_virt[request_id];
+	memset(full_command_packet, 0, sizeof(TW_Command_Full));
+
+	/* Initialize cdb */
+	memset(&cdb, 0, TW_MAX_CDB_LEN);
+	cdb[0] = REQUEST_SENSE; /* opcode */
+	cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
+
+	/* Initialize sglist */
+	memset(&sglist, 0, sizeof(TW_SG_Entry));
+	sglist[0].length = cpu_to_le32(TW_SECTOR_SIZE);
+	sglist[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
+
+	if (tw_dev->generic_buffer_phys[request_id] & TW_ALIGNMENT_9000_SGL) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Found unaligned address during AEN drain");
+		goto out;
+	}
+
+	/* Mark internal command */
+	tw_dev->srb[request_id] = NULL;
+
+	do {
+		/* Send command to the board */
+		if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Error posting request sense");
+			goto out;
+		}
+
+		/* Now poll for completion */
+		if (twa_poll_response(tw_dev, request_id, 30)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "No valid response while draining AEN queue");
+			tw_dev->posted_request_count--;
+			goto out;
+		}
+
+		tw_dev->posted_request_count--;
+		header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
+		aen = le16_to_cpu(header->status_block.error);
+		queue = 0;
+		count++;
+
+		switch (aen) {
+		case TW_AEN_QUEUE_EMPTY:
+			if (first_reset != 1)
+				goto out;
+			else
+				finished = 1;
+			break;
+		case TW_AEN_SOFT_RESET:
+			if (first_reset == 0)
+				first_reset = 1;
+			else
+				queue = 1;
+			break;
+		case TW_AEN_SYNC_TIME_WITH_HOST:
+			break;
+		default:
+			queue = 1;
+		}
+
+		/* Now queue an event info */
+		if (queue)
+			twa_aen_queue_event(tw_dev, header);
+	} while ((finished == 0) && (count < TW_MAX_AEN_DRAIN));
+
+	if (count == TW_MAX_AEN_DRAIN)
+		goto out;
+
+	retval = 0;
+out:
+	tw_dev->state[request_id] = TW_S_INITIAL;
+	return retval;
+} /* End twa_aen_drain_queue() */
+
+/* This function will queue an event */
+static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
+{
+	u32 local_time;
+	TW_Event *event;
+	unsigned short aen;
+	char host[16];
+	char *error_str;
+
+	tw_dev->aen_count++;
+
+	/* Fill out event info */
+	event = tw_dev->event_queue[tw_dev->error_index];
+
+	/* Check for clobber */
+	host[0] = '\0';
+	if (tw_dev->host) {
+		sprintf(host, " scsi%d:", tw_dev->host->host_no);
+		if (event->retrieved == TW_AEN_NOT_RETRIEVED)
+			tw_dev->aen_clobber = 1;
+	}
+
+	aen = le16_to_cpu(header->status_block.error);
+	memset(event, 0, sizeof(TW_Event));
+
+	event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
+	/* event->time_stamp_sec overflows in y2106 */
+	local_time = (u32)(ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60));
+	event->time_stamp_sec = local_time;
+	event->aen_code = aen;
+	event->retrieved = TW_AEN_NOT_RETRIEVED;
+	event->sequence_id = tw_dev->error_sequence_id;
+	tw_dev->error_sequence_id++;
+
+	/* Check for embedded error string */
+	error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]);
+
+	header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0';
+	event->parameter_len = strlen(header->err_specific_desc);
+	memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + (error_str[0] == '\0' ? 0 : (1 + strlen(error_str))));
+	if (event->severity != TW_AEN_SEVERITY_DEBUG)
+		printk(KERN_WARNING "3w-9xxx:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
+		       host,
+		       twa_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
+		       TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen,
+		       error_str[0] == '\0' ? twa_string_lookup(twa_aen_table, aen) : error_str,
+		       header->err_specific_desc);
+	else
+		tw_dev->aen_count--;
+
+	if ((tw_dev->error_index + 1) == TW_Q_LENGTH)
+		tw_dev->event_queue_wrapped = 1;
+	tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
+} /* End twa_aen_queue_event() */
+
+/* This function will read the aen queue from the isr */
+static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
+{
+	unsigned char cdb[TW_MAX_CDB_LEN];
+	TW_SG_Entry sglist[1];
+	TW_Command_Full *full_command_packet;
+	int retval = 1;
+
+	full_command_packet = tw_dev->command_packet_virt[request_id];
+	memset(full_command_packet, 0, sizeof(TW_Command_Full));
+
+	/* Initialize cdb */
+	memset(&cdb, 0, TW_MAX_CDB_LEN);
+	cdb[0] = REQUEST_SENSE; /* opcode */
+	cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
+
+	/* Initialize sglist */
+	memset(&sglist, 0, sizeof(TW_SG_Entry));
+	sglist[0].length = cpu_to_le32(TW_SECTOR_SIZE);
+	sglist[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
+
+	/* Mark internal command */
+	tw_dev->srb[request_id] = NULL;
+
+	/* Now post the command packet */
+	if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "Post failed while reading AEN queue");
+		goto out;
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twa_aen_read_queue() */
+
+/* This function will look up an AEN severity string */
+static char *twa_aen_severity_lookup(unsigned char severity_code)
+{
+	char *retval = NULL;
+
+	if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) ||
+	    (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG))
+		goto out;
+
+	retval = twa_aen_severity_table[severity_code];
+out:
+	return retval;
+} /* End twa_aen_severity_lookup() */
+
+/* This function will sync firmware time with the host time */
+static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
+{
+	u32 schedulertime;
+	TW_Command_Full *full_command_packet;
+	TW_Command *command_packet;
+	TW_Param_Apache *param;
+	time64_t local_time;
+
+	/* Fill out the command packet */
+	full_command_packet = tw_dev->command_packet_virt[request_id];
+	memset(full_command_packet, 0, sizeof(TW_Command_Full));
+	command_packet = &full_command_packet->command.oldcommand;
+	command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
+	command_packet->request_id = request_id;
+	command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
+	command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
+	command_packet->size = TW_COMMAND_SIZE;
+	command_packet->byte6_offset.parameter_count = cpu_to_le16(1);
+
+	/* Setup the param */
+	param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
+	memset(param, 0, TW_SECTOR_SIZE);
+	param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */
+	param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
+	param->parameter_size_bytes = cpu_to_le16(4);
+
+	/* Convert system time in UTC to local time seconds since last
+           Sunday 12:00AM */
+	local_time = (ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60));
+	div_u64_rem(local_time - (3 * 86400), 604800, &schedulertime);
+
+	memcpy(param->data, &(__le32){cpu_to_le32(schedulertime)}, sizeof(__le32));
+
+	/* Mark internal command */
+	tw_dev->srb[request_id] = NULL;
+
+	/* Now post the command */
+	twa_post_command_packet(tw_dev, request_id, 1);
+} /* End twa_aen_sync_time() */
+
+/* This function will allocate memory and check if it is correctly aligned */
+static int twa_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
+{
+	int i;
+	dma_addr_t dma_handle;
+	unsigned long *cpu_addr;
+	int retval = 1;
+
+	cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev,
+			size * TW_Q_LENGTH, &dma_handle, GFP_KERNEL);
+	if (!cpu_addr) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
+		goto out;
+	}
+
+	if ((unsigned long)cpu_addr % (TW_ALIGNMENT_9000)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x6, "Failed to allocate correctly aligned memory");
+		dma_free_coherent(&tw_dev->tw_pci_dev->dev, size * TW_Q_LENGTH,
+				cpu_addr, dma_handle);
+		goto out;
+	}
+
+	memset(cpu_addr, 0, size*TW_Q_LENGTH);
+
+	for (i = 0; i < TW_Q_LENGTH; i++) {
+		switch(which) {
+		case 0:
+			tw_dev->command_packet_phys[i] = dma_handle+(i*size);
+			tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size));
+			break;
+		case 1:
+			tw_dev->generic_buffer_phys[i] = dma_handle+(i*size);
+			tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
+			break;
+		}
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twa_allocate_memory() */
+
+/* This function will check the status register for unexpected bits */
+static int twa_check_bits(u32 status_reg_value)
+{
+	int retval = 1;
+
+	if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS)
+		goto out;
+	if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0)
+		goto out;
+
+	retval = 0;
+out:
+	return retval;
+} /* End twa_check_bits() */
+
+/* This function will check the srl and decide if we are compatible  */
+static int twa_check_srl(TW_Device_Extension *tw_dev, int *flashed)
+{
+	int retval = 1;
+	unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0;
+	unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0;
+	u32 init_connect_result = 0;
+
+	if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
+			       TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
+			       TW_9000_ARCH_ID, TW_CURRENT_DRIVER_BRANCH,
+			       TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl,
+			       &fw_on_ctlr_arch_id, &fw_on_ctlr_branch,
+			       &fw_on_ctlr_build, &init_connect_result)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "Initconnection failed while checking SRL");
+		goto out;
+	}
+
+	tw_dev->tw_compat_info.working_srl = fw_on_ctlr_srl;
+	tw_dev->tw_compat_info.working_branch = fw_on_ctlr_branch;
+	tw_dev->tw_compat_info.working_build = fw_on_ctlr_build;
+
+	/* Try base mode compatibility */
+	if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
+		if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
+				       TW_EXTENDED_INIT_CONNECT,
+				       TW_BASE_FW_SRL, TW_9000_ARCH_ID,
+				       TW_BASE_FW_BRANCH, TW_BASE_FW_BUILD,
+				       &fw_on_ctlr_srl, &fw_on_ctlr_arch_id,
+				       &fw_on_ctlr_branch, &fw_on_ctlr_build,
+				       &init_connect_result)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Initconnection (base mode) failed while checking SRL");
+			goto out;
+		}
+		if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
+			if (TW_CURRENT_DRIVER_SRL > fw_on_ctlr_srl) {
+				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x32, "Firmware and driver incompatibility: please upgrade firmware");
+			} else {
+				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x33, "Firmware and driver incompatibility: please upgrade driver");
+			}
+			goto out;
+		}
+		tw_dev->tw_compat_info.working_srl = TW_BASE_FW_SRL;
+		tw_dev->tw_compat_info.working_branch = TW_BASE_FW_BRANCH;
+		tw_dev->tw_compat_info.working_build = TW_BASE_FW_BUILD;
+	}
+
+	/* Load rest of compatibility struct */
+	strlcpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION,
+		sizeof(tw_dev->tw_compat_info.driver_version));
+	tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL;
+	tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH;
+	tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD;
+	tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL;
+	tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH;
+	tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD;
+	tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl;
+	tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch;
+	tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build;
+
+	retval = 0;
+out:
+	return retval;
+} /* End twa_check_srl() */
+
+/* This function handles ioctl for the character device */
+static long twa_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct inode *inode = file_inode(file);
+	long timeout;
+	unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
+	dma_addr_t dma_handle;
+	int request_id = 0;
+	unsigned int sequence_id = 0;
+	unsigned char event_index, start_index;
+	TW_Ioctl_Driver_Command driver_command;
+	TW_Ioctl_Buf_Apache *tw_ioctl;
+	TW_Lock *tw_lock;
+	TW_Command_Full *full_command_packet;
+	TW_Compatibility_Info *tw_compat_info;
+	TW_Event *event;
+	ktime_t current_time;
+	TW_Device_Extension *tw_dev = twa_device_extension_list[iminor(inode)];
+	int retval = TW_IOCTL_ERROR_OS_EFAULT;
+	void __user *argp = (void __user *)arg;
+
+	mutex_lock(&twa_chrdev_mutex);
+
+	/* Only let one of these through at a time */
+	if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
+		retval = TW_IOCTL_ERROR_OS_EINTR;
+		goto out;
+	}
+
+	/* First copy down the driver command */
+	if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command)))
+		goto out2;
+
+	/* Check data buffer size */
+	if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) {
+		retval = TW_IOCTL_ERROR_OS_EINVAL;
+		goto out2;
+	}
+
+	/* Hardware can only do multiple of 512 byte transfers */
+	data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511;
+
+	/* Now allocate ioctl buf memory */
+	cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev,
+				      sizeof(TW_Ioctl_Buf_Apache) + data_buffer_length_adjusted,
+				      &dma_handle, GFP_KERNEL);
+	if (!cpu_addr) {
+		retval = TW_IOCTL_ERROR_OS_ENOMEM;
+		goto out2;
+	}
+
+	tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
+
+	/* Now copy down the entire ioctl */
+	if (copy_from_user(tw_ioctl, argp, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length))
+		goto out3;
+
+	/* See which ioctl we are doing */
+	switch (cmd) {
+	case TW_IOCTL_FIRMWARE_PASS_THROUGH:
+		spin_lock_irqsave(tw_dev->host->host_lock, flags);
+		twa_get_request_id(tw_dev, &request_id);
+
+		/* Flag internal command */
+		tw_dev->srb[request_id] = NULL;
+
+		/* Flag chrdev ioctl */
+		tw_dev->chrdev_request_id = request_id;
+
+		full_command_packet = &tw_ioctl->firmware_command;
+
+		/* Load request id and sglist for both command types */
+		twa_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted);
+
+		memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full));
+
+		/* Now post the command packet to the controller */
+		twa_post_command_packet(tw_dev, request_id, 1);
+		spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+
+		timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
+
+		/* Now wait for command to complete */
+		timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
+
+		/* We timed out, and didn't get an interrupt */
+		if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
+			/* Now we need to reset the board */
+			printk(KERN_WARNING "3w-9xxx: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
+			       tw_dev->host->host_no, TW_DRIVER, 0x37,
+			       cmd);
+			retval = TW_IOCTL_ERROR_OS_EIO;
+			twa_reset_device_extension(tw_dev);
+			goto out3;
+		}
+
+		/* Now copy in the command packet response */
+		memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full));
+
+		/* Now complete the io */
+		spin_lock_irqsave(tw_dev->host->host_lock, flags);
+		tw_dev->posted_request_count--;
+		tw_dev->state[request_id] = TW_S_COMPLETED;
+		twa_free_request_id(tw_dev, request_id);
+		spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+		break;
+	case TW_IOCTL_GET_COMPATIBILITY_INFO:
+		tw_ioctl->driver_command.status = 0;
+		/* Copy compatibility struct into ioctl data buffer */
+		tw_compat_info = (TW_Compatibility_Info *)tw_ioctl->data_buffer;
+		memcpy(tw_compat_info, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info));
+		break;
+	case TW_IOCTL_GET_LAST_EVENT:
+		if (tw_dev->event_queue_wrapped) {
+			if (tw_dev->aen_clobber) {
+				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
+				tw_dev->aen_clobber = 0;
+			} else
+				tw_ioctl->driver_command.status = 0;
+		} else {
+			if (!tw_dev->error_index) {
+				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
+				break;
+			}
+			tw_ioctl->driver_command.status = 0;
+		}
+		event_index = (tw_dev->error_index - 1 + TW_Q_LENGTH) % TW_Q_LENGTH;
+		memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
+		tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
+		break;
+	case TW_IOCTL_GET_FIRST_EVENT:
+		if (tw_dev->event_queue_wrapped) {
+			if (tw_dev->aen_clobber) {
+				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
+				tw_dev->aen_clobber = 0;
+			} else
+				tw_ioctl->driver_command.status = 0;
+			event_index = tw_dev->error_index;
+		} else {
+			if (!tw_dev->error_index) {
+				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
+				break;
+			}
+			tw_ioctl->driver_command.status = 0;
+			event_index = 0;
+		}
+		memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
+		tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
+		break;
+	case TW_IOCTL_GET_NEXT_EVENT:
+		event = (TW_Event *)tw_ioctl->data_buffer;
+		sequence_id = event->sequence_id;
+		tw_ioctl->driver_command.status = 0;
+
+		if (tw_dev->event_queue_wrapped) {
+			if (tw_dev->aen_clobber) {
+				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
+				tw_dev->aen_clobber = 0;
+			}
+			start_index = tw_dev->error_index;
+		} else {
+			if (!tw_dev->error_index) {
+				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
+				break;
+			}
+			start_index = 0;
+		}
+		event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id + 1) % TW_Q_LENGTH;
+
+		if (!(tw_dev->event_queue[event_index]->sequence_id > sequence_id)) {
+			if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
+				tw_dev->aen_clobber = 1;
+			tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
+			break;
+		}
+		memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
+		tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
+		break;
+	case TW_IOCTL_GET_PREVIOUS_EVENT:
+		event = (TW_Event *)tw_ioctl->data_buffer;
+		sequence_id = event->sequence_id;
+		tw_ioctl->driver_command.status = 0;
+
+		if (tw_dev->event_queue_wrapped) {
+			if (tw_dev->aen_clobber) {
+				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
+				tw_dev->aen_clobber = 0;
+			}
+			start_index = tw_dev->error_index;
+		} else {
+			if (!tw_dev->error_index) {
+				tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
+				break;
+			}
+			start_index = 0;
+		}
+		event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id - 1) % TW_Q_LENGTH;
+
+		if (!(tw_dev->event_queue[event_index]->sequence_id < sequence_id)) {
+			if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
+				tw_dev->aen_clobber = 1;
+			tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
+			break;
+		}
+		memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
+		tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
+		break;
+	case TW_IOCTL_GET_LOCK:
+		tw_lock = (TW_Lock *)tw_ioctl->data_buffer;
+		current_time = ktime_get();
+
+		if ((tw_lock->force_flag == 1) || (tw_dev->ioctl_sem_lock == 0) ||
+		    ktime_after(current_time, tw_dev->ioctl_time)) {
+			tw_dev->ioctl_sem_lock = 1;
+			tw_dev->ioctl_time = ktime_add_ms(current_time, tw_lock->timeout_msec);
+			tw_ioctl->driver_command.status = 0;
+			tw_lock->time_remaining_msec = tw_lock->timeout_msec;
+		} else {
+			tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_LOCKED;
+			tw_lock->time_remaining_msec = ktime_ms_delta(tw_dev->ioctl_time, current_time);
+		}
+		break;
+	case TW_IOCTL_RELEASE_LOCK:
+		if (tw_dev->ioctl_sem_lock == 1) {
+			tw_dev->ioctl_sem_lock = 0;
+			tw_ioctl->driver_command.status = 0;
+		} else {
+			tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NOT_LOCKED;
+		}
+		break;
+	default:
+		retval = TW_IOCTL_ERROR_OS_ENOTTY;
+		goto out3;
+	}
+
+	/* Now copy the entire response to userspace */
+	if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length) == 0)
+		retval = 0;
+out3:
+	/* Now free ioctl buf memory */
+	dma_free_coherent(&tw_dev->tw_pci_dev->dev,
+			  sizeof(TW_Ioctl_Buf_Apache) + data_buffer_length_adjusted,
+			  cpu_addr, dma_handle);
+out2:
+	mutex_unlock(&tw_dev->ioctl_lock);
+out:
+	mutex_unlock(&twa_chrdev_mutex);
+	return retval;
+} /* End twa_chrdev_ioctl() */
+
+/* This function handles open for the character device */
+/* NOTE that this function will race with remove. */
+static int twa_chrdev_open(struct inode *inode, struct file *file)
+{
+	unsigned int minor_number;
+	int retval = TW_IOCTL_ERROR_OS_ENODEV;
+
+	if (!capable(CAP_SYS_ADMIN)) {
+		retval = -EACCES;
+		goto out;
+	}
+
+	minor_number = iminor(inode);
+	if (minor_number >= twa_device_extension_count)
+		goto out;
+	retval = 0;
+out:
+	return retval;
+} /* End twa_chrdev_open() */
+
+/* This function will print readable messages from status register errors */
+static int twa_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value)
+{
+	int retval = 1;
+
+	/* Check for various error conditions and handle them appropriately */
+	if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "PCI Parity Error: clearing");
+		writel(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
+	}
+
+	if (status_reg_value & TW_STATUS_PCI_ABORT) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "PCI Abort: clearing");
+		writel(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
+		pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
+	}
+
+	if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
+		if (((tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9650SE) &&
+		     (tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9690SA)) ||
+		    (!test_bit(TW_IN_RESET, &tw_dev->flags)))
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Controller Queue Error: clearing");
+		writel(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
+	}
+
+	if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
+		if (tw_dev->reset_print == 0) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Microcontroller Error: clearing");
+			tw_dev->reset_print = 1;
+		}
+		goto out;
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twa_decode_bits() */
+
+/* This function will empty the response queue */
+static int twa_empty_response_queue(TW_Device_Extension *tw_dev)
+{
+	u32 status_reg_value;
+	int count = 0, retval = 1;
+
+	status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+
+	while (((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) && (count < TW_MAX_RESPONSE_DRAIN)) {
+		readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
+		status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+		count++;
+	}
+	if (count == TW_MAX_RESPONSE_DRAIN)
+		goto out;
+
+	retval = 0;
+out:
+	return retval;
+} /* End twa_empty_response_queue() */
+
+/* This function will clear the pchip/response queue on 9550SX */
+static int twa_empty_response_queue_large(TW_Device_Extension *tw_dev)
+{
+	u32 response_que_value = 0;
+	unsigned long before;
+	int retval = 1;
+
+	if (tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9000) {
+		before = jiffies;
+		while ((response_que_value & TW_9550SX_DRAIN_COMPLETED) != TW_9550SX_DRAIN_COMPLETED) {
+			response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR_LARGE(tw_dev));
+			msleep(1);
+			if (time_after(jiffies, before + HZ * 30))
+				goto out;
+		}
+		/* P-chip settle time */
+		msleep(500);
+		retval = 0;
+	} else
+		retval = 0;
+out:
+	return retval;
+} /* End twa_empty_response_queue_large() */
+
+/* This function passes sense keys from firmware to scsi layer */
+static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host)
+{
+	TW_Command_Full *full_command_packet;
+	unsigned short error;
+	int retval = 1;
+	char *error_str;
+
+	full_command_packet = tw_dev->command_packet_virt[request_id];
+
+	/* Check for embedded error string */
+	error_str = &(full_command_packet->header.err_specific_desc[strlen(full_command_packet->header.err_specific_desc) + 1]);
+
+	/* Don't print error for Logical unit not supported during rollcall */
+	error = le16_to_cpu(full_command_packet->header.status_block.error);
+	if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE)) {
+		if (print_host)
+			printk(KERN_WARNING "3w-9xxx: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
+			       tw_dev->host->host_no,
+			       TW_MESSAGE_SOURCE_CONTROLLER_ERROR, error,
+			       error_str[0] ? error_str : twa_string_lookup(twa_error_table, error),
+			       full_command_packet->header.err_specific_desc);
+		else
+			printk(KERN_WARNING "3w-9xxx: ERROR: (0x%02X:0x%04X): %s:%s.\n",
+			       TW_MESSAGE_SOURCE_CONTROLLER_ERROR, error,
+			       error_str[0] ? error_str : twa_string_lookup(twa_error_table, error),
+			       full_command_packet->header.err_specific_desc);
+	}
+
+	if (copy_sense) {
+		memcpy(tw_dev->srb[request_id]->sense_buffer, full_command_packet->header.sense_data, TW_SENSE_DATA_LENGTH);
+		tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
+		retval = TW_ISR_DONT_RESULT;
+		goto out;
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twa_fill_sense() */
+
+/* This function will free up device extension resources */
+static void twa_free_device_extension(TW_Device_Extension *tw_dev)
+{
+	if (tw_dev->command_packet_virt[0])
+		dma_free_coherent(&tw_dev->tw_pci_dev->dev,
+				sizeof(TW_Command_Full) * TW_Q_LENGTH,
+				tw_dev->command_packet_virt[0],
+				tw_dev->command_packet_phys[0]);
+
+	if (tw_dev->generic_buffer_virt[0])
+		dma_free_coherent(&tw_dev->tw_pci_dev->dev,
+				TW_SECTOR_SIZE * TW_Q_LENGTH,
+				tw_dev->generic_buffer_virt[0],
+				tw_dev->generic_buffer_phys[0]);
+
+	kfree(tw_dev->event_queue[0]);
+} /* End twa_free_device_extension() */
+
+/* This function will free a request id */
+static void twa_free_request_id(TW_Device_Extension *tw_dev, int request_id)
+{
+	tw_dev->free_queue[tw_dev->free_tail] = request_id;
+	tw_dev->state[request_id] = TW_S_FINISHED;
+	tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
+} /* End twa_free_request_id() */
+
+/* This function will get parameter table entries from the firmware */
+static void *twa_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes)
+{
+	TW_Command_Full *full_command_packet;
+	TW_Command *command_packet;
+	TW_Param_Apache *param;
+	void *retval = NULL;
+
+	/* Setup the command packet */
+	full_command_packet = tw_dev->command_packet_virt[request_id];
+	memset(full_command_packet, 0, sizeof(TW_Command_Full));
+	command_packet = &full_command_packet->command.oldcommand;
+
+	command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
+	command_packet->size		  = TW_COMMAND_SIZE;
+	command_packet->request_id	  = request_id;
+	command_packet->byte6_offset.block_count = cpu_to_le16(1);
+
+	/* Now setup the param */
+	param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
+	memset(param, 0, TW_SECTOR_SIZE);
+	param->table_id = cpu_to_le16(table_id | 0x8000);
+	param->parameter_id = cpu_to_le16(parameter_id);
+	param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes);
+
+	command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
+	command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
+
+	/* Post the command packet to the board */
+	twa_post_command_packet(tw_dev, request_id, 1);
+
+	/* Poll for completion */
+	if (twa_poll_response(tw_dev, request_id, 30))
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "No valid response during get param")
+	else
+		retval = (void *)&(param->data[0]);
+
+	tw_dev->posted_request_count--;
+	tw_dev->state[request_id] = TW_S_INITIAL;
+
+	return retval;
+} /* End twa_get_param() */
+
+/* This function will assign an available request id */
+static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id)
+{
+	*request_id = tw_dev->free_queue[tw_dev->free_head];
+	tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
+	tw_dev->state[*request_id] = TW_S_STARTED;
+} /* End twa_get_request_id() */
+
+/* This function will send an initconnection command to controller */
+static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
+			      u32 set_features, unsigned short current_fw_srl,
+			      unsigned short current_fw_arch_id,
+			      unsigned short current_fw_branch,
+			      unsigned short current_fw_build,
+			      unsigned short *fw_on_ctlr_srl,
+			      unsigned short *fw_on_ctlr_arch_id,
+			      unsigned short *fw_on_ctlr_branch,
+			      unsigned short *fw_on_ctlr_build,
+			      u32 *init_connect_result)
+{
+	TW_Command_Full *full_command_packet;
+	TW_Initconnect *tw_initconnect;
+	int request_id = 0, retval = 1;
+
+	/* Initialize InitConnection command packet */
+	full_command_packet = tw_dev->command_packet_virt[request_id];
+	memset(full_command_packet, 0, sizeof(TW_Command_Full));
+	full_command_packet->header.header_desc.size_header = 128;
+
+	tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand;
+	tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION);
+	tw_initconnect->request_id = request_id;
+	tw_initconnect->message_credits = cpu_to_le16(message_credits);
+
+	/* Turn on 64-bit sgl support if we need to */
+	set_features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
+
+	tw_initconnect->features = cpu_to_le32(set_features);
+
+	if (set_features & TW_EXTENDED_INIT_CONNECT) {
+		tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED;
+		tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl);
+		tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id);
+		tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch);
+		tw_initconnect->fw_build = cpu_to_le16(current_fw_build);
+	} else
+		tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE;
+
+	/* Send command packet to the board */
+	twa_post_command_packet(tw_dev, request_id, 1);
+
+	/* Poll for completion */
+	if (twa_poll_response(tw_dev, request_id, 30)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "No valid response during init connection");
+	} else {
+		if (set_features & TW_EXTENDED_INIT_CONNECT) {
+			*fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl);
+			*fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id);
+			*fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch);
+			*fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build);
+			*init_connect_result = le32_to_cpu(tw_initconnect->result);
+		}
+		retval = 0;
+	}
+
+	tw_dev->posted_request_count--;
+	tw_dev->state[request_id] = TW_S_INITIAL;
+
+	return retval;
+} /* End twa_initconnection() */
+
+/* This function will initialize the fields of a device extension */
+static int twa_initialize_device_extension(TW_Device_Extension *tw_dev)
+{
+	int i, retval = 1;
+
+	/* Initialize command packet buffers */
+	if (twa_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Command packet memory allocation failed");
+		goto out;
+	}
+
+	/* Initialize generic buffer */
+	if (twa_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x17, "Generic memory allocation failed");
+		goto out;
+	}
+
+	/* Allocate event info space */
+	tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL);
+	if (!tw_dev->event_queue[0]) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x18, "Event info memory allocation failed");
+		goto out;
+	}
+
+
+	for (i = 0; i < TW_Q_LENGTH; i++) {
+		tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event)));
+		tw_dev->free_queue[i] = i;
+		tw_dev->state[i] = TW_S_INITIAL;
+	}
+
+	tw_dev->pending_head = TW_Q_START;
+	tw_dev->pending_tail = TW_Q_START;
+	tw_dev->free_head = TW_Q_START;
+	tw_dev->free_tail = TW_Q_START;
+	tw_dev->error_sequence_id = 1;
+	tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
+
+	mutex_init(&tw_dev->ioctl_lock);
+	init_waitqueue_head(&tw_dev->ioctl_wqueue);
+
+	retval = 0;
+out:
+	return retval;
+} /* End twa_initialize_device_extension() */
+
+/* This function is the interrupt service routine */
+static irqreturn_t twa_interrupt(int irq, void *dev_instance)
+{
+	int request_id, error = 0;
+	u32 status_reg_value;
+	TW_Response_Queue response_que;
+	TW_Command_Full *full_command_packet;
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
+	int handled = 0;
+
+	/* Get the per adapter lock */
+	spin_lock(tw_dev->host->host_lock);
+
+	/* Read the registers */
+	status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+
+	/* Check if this is our interrupt, otherwise bail */
+	if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
+		goto twa_interrupt_bail;
+
+	handled = 1;
+
+	/* If we are resetting, bail */
+	if (test_bit(TW_IN_RESET, &tw_dev->flags))
+		goto twa_interrupt_bail;
+
+	/* Check controller for errors */
+	if (twa_check_bits(status_reg_value)) {
+		if (twa_decode_bits(tw_dev, status_reg_value)) {
+			TW_CLEAR_ALL_INTERRUPTS(tw_dev);
+			goto twa_interrupt_bail;
+		}
+	}
+
+	/* Handle host interrupt */
+	if (status_reg_value & TW_STATUS_HOST_INTERRUPT)
+		TW_CLEAR_HOST_INTERRUPT(tw_dev);
+
+	/* Handle attention interrupt */
+	if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
+		TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
+		if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
+			twa_get_request_id(tw_dev, &request_id);
+
+			error = twa_aen_read_queue(tw_dev, request_id);
+			if (error) {
+				tw_dev->state[request_id] = TW_S_COMPLETED;
+				twa_free_request_id(tw_dev, request_id);
+				clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
+			}
+		}
+	}
+
+	/* Handle command interrupt */
+	if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
+		TW_MASK_COMMAND_INTERRUPT(tw_dev);
+		/* Drain as many pending commands as we can */
+		while (tw_dev->pending_request_count > 0) {
+			request_id = tw_dev->pending_queue[tw_dev->pending_head];
+			if (tw_dev->state[request_id] != TW_S_PENDING) {
+				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x19, "Found request id that wasn't pending");
+				TW_CLEAR_ALL_INTERRUPTS(tw_dev);
+				goto twa_interrupt_bail;
+			}
+			if (twa_post_command_packet(tw_dev, request_id, 1)==0) {
+				tw_dev->pending_head = (tw_dev->pending_head + 1) % TW_Q_LENGTH;
+				tw_dev->pending_request_count--;
+			} else {
+				/* If we get here, we will continue re-posting on the next command interrupt */
+				break;
+			}
+		}
+	}
+
+	/* Handle response interrupt */
+	if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
+
+		/* Drain the response queue from the board */
+		while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
+			/* Complete the response */
+			response_que.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
+			request_id = TW_RESID_OUT(response_que.response_id);
+			full_command_packet = tw_dev->command_packet_virt[request_id];
+			error = 0;
+			/* Check for command packet errors */
+			if (full_command_packet->command.newcommand.status != 0) {
+				if (tw_dev->srb[request_id] != NULL) {
+					error = twa_fill_sense(tw_dev, request_id, 1, 1);
+				} else {
+					/* Skip ioctl error prints */
+					if (request_id != tw_dev->chrdev_request_id) {
+						error = twa_fill_sense(tw_dev, request_id, 0, 1);
+					}
+				}
+			}
+
+			/* Check for correct state */
+			if (tw_dev->state[request_id] != TW_S_POSTED) {
+				if (tw_dev->srb[request_id] != NULL) {
+					TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Received a request id that wasn't posted");
+					TW_CLEAR_ALL_INTERRUPTS(tw_dev);
+					goto twa_interrupt_bail;
+				}
+			}
+
+			/* Check for internal command completion */
+			if (tw_dev->srb[request_id] == NULL) {
+				if (request_id != tw_dev->chrdev_request_id) {
+					if (twa_aen_complete(tw_dev, request_id))
+						TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Error completing AEN during attention interrupt");
+				} else {
+					tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
+					wake_up(&tw_dev->ioctl_wqueue);
+				}
+			} else {
+				struct scsi_cmnd *cmd;
+
+				cmd = tw_dev->srb[request_id];
+
+				twa_scsiop_execute_scsi_complete(tw_dev, request_id);
+				/* If no error command was a success */
+				if (error == 0) {
+					cmd->result = (DID_OK << 16);
+				}
+
+				/* If error, command failed */
+				if (error == 1) {
+					/* Ask for a host reset */
+					cmd->result = (DID_OK << 16) | SAM_STAT_CHECK_CONDITION;
+				}
+
+				/* Report residual bytes for single sgl */
+				if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) {
+					u32 length = le32_to_cpu(full_command_packet->command.newcommand.sg_list[0].length);
+
+					if (length < scsi_bufflen(cmd))
+						scsi_set_resid(cmd, scsi_bufflen(cmd) - length);
+				}
+
+				/* Now complete the io */
+				if (twa_command_mapped(cmd))
+					scsi_dma_unmap(cmd);
+				scsi_done(cmd);
+				tw_dev->state[request_id] = TW_S_COMPLETED;
+				twa_free_request_id(tw_dev, request_id);
+				tw_dev->posted_request_count--;
+			}
+
+			/* Check for valid status after each drain */
+			status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+			if (twa_check_bits(status_reg_value)) {
+				if (twa_decode_bits(tw_dev, status_reg_value)) {
+					TW_CLEAR_ALL_INTERRUPTS(tw_dev);
+					goto twa_interrupt_bail;
+				}
+			}
+		}
+	}
+
+twa_interrupt_bail:
+	spin_unlock(tw_dev->host->host_lock);
+	return IRQ_RETVAL(handled);
+} /* End twa_interrupt() */
+
+/* This function will load the request id and various sgls for ioctls */
+static void twa_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length)
+{
+	TW_Command *oldcommand;
+	TW_Command_Apache *newcommand;
+	TW_SG_Entry *sgl;
+	unsigned int pae = 0;
+
+	if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4))
+		pae = 1;
+
+	if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
+		newcommand = &full_command_packet->command.newcommand;
+		newcommand->request_id__lunl =
+			TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id);
+		if (length) {
+			newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache));
+			newcommand->sg_list[0].length = cpu_to_le32(length);
+		}
+		newcommand->sgl_entries__lunh =
+			TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0);
+	} else {
+		oldcommand = &full_command_packet->command.oldcommand;
+		oldcommand->request_id = request_id;
+
+		if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
+			/* Load the sg list */
+			if (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)
+				sgl = (TW_SG_Entry *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry)/4) + pae);
+			else
+				sgl = (TW_SG_Entry *)((u32 *)oldcommand+TW_SGL_OUT(oldcommand->opcode__sgloffset));
+			sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache));
+			sgl->length = cpu_to_le32(length);
+
+			oldcommand->size += pae;
+		}
+	}
+} /* End twa_load_sgl() */
+
+/* This function will poll for a response interrupt of a request */
+static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
+{
+	int retval = 1, found = 0, response_request_id;
+	TW_Response_Queue response_queue;
+	TW_Command_Full *full_command_packet = tw_dev->command_packet_virt[request_id];
+
+	if (twa_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, seconds) == 0) {
+		response_queue.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
+		response_request_id = TW_RESID_OUT(response_queue.response_id);
+		if (request_id != response_request_id) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "Found unexpected request id while polling for response");
+			goto out;
+		}
+		if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
+			if (full_command_packet->command.newcommand.status != 0) {
+				/* bad response */
+				twa_fill_sense(tw_dev, request_id, 0, 0);
+				goto out;
+			}
+			found = 1;
+		} else {
+			if (full_command_packet->command.oldcommand.status != 0) {
+				/* bad response */
+				twa_fill_sense(tw_dev, request_id, 0, 0);
+				goto out;
+			}
+			found = 1;
+		}
+	}
+
+	if (found)
+		retval = 0;
+out:
+	return retval;
+} /* End twa_poll_response() */
+
+/* This function will poll the status register for a flag */
+static int twa_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
+{
+	u32 status_reg_value;
+	unsigned long before;
+	int retval = 1;
+
+	status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+	before = jiffies;
+
+	if (twa_check_bits(status_reg_value))
+		twa_decode_bits(tw_dev, status_reg_value);
+
+	while ((status_reg_value & flag) != flag) {
+		status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+
+		if (twa_check_bits(status_reg_value))
+			twa_decode_bits(tw_dev, status_reg_value);
+
+		if (time_after(jiffies, before + HZ * seconds))
+			goto out;
+
+		msleep(50);
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twa_poll_status() */
+
+/* This function will poll the status register for disappearance of a flag */
+static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
+{
+	u32 status_reg_value;
+	unsigned long before;
+	int retval = 1;
+
+	status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+	before = jiffies;
+
+	if (twa_check_bits(status_reg_value))
+		twa_decode_bits(tw_dev, status_reg_value);
+
+	while ((status_reg_value & flag) != 0) {
+		status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+		if (twa_check_bits(status_reg_value))
+			twa_decode_bits(tw_dev, status_reg_value);
+
+		if (time_after(jiffies, before + HZ * seconds))
+			goto out;
+
+		msleep(50);
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twa_poll_status_gone() */
+
+/* This function will attempt to post a command packet to the board */
+static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal)
+{
+	u32 status_reg_value;
+	dma_addr_t command_que_value;
+	int retval = 1;
+
+	command_que_value = tw_dev->command_packet_phys[request_id];
+
+	/* For 9650SE write low 4 bytes first */
+	if ((tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
+	    (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)) {
+		command_que_value += TW_COMMAND_OFFSET;
+		writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR_LARGE(tw_dev));
+	}
+
+	status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
+
+	if (twa_check_bits(status_reg_value))
+		twa_decode_bits(tw_dev, status_reg_value);
+
+	if (((tw_dev->pending_request_count > 0) && (tw_dev->state[request_id] != TW_S_PENDING)) || (status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL)) {
+
+		/* Only pend internal driver commands */
+		if (!internal) {
+			retval = SCSI_MLQUEUE_HOST_BUSY;
+			goto out;
+		}
+
+		/* Couldn't post the command packet, so we do it later */
+		if (tw_dev->state[request_id] != TW_S_PENDING) {
+			tw_dev->state[request_id] = TW_S_PENDING;
+			tw_dev->pending_request_count++;
+			if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
+				tw_dev->max_pending_request_count = tw_dev->pending_request_count;
+			}
+			tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
+			tw_dev->pending_tail = (tw_dev->pending_tail + 1) % TW_Q_LENGTH;
+		}
+		TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
+		goto out;
+	} else {
+		if ((tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
+		    (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)) {
+			/* Now write upper 4 bytes */
+			writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR_LARGE(tw_dev) + 0x4);
+		} else {
+			if (sizeof(dma_addr_t) > 4) {
+				command_que_value += TW_COMMAND_OFFSET;
+				writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
+				writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR(tw_dev) + 0x4);
+			} else {
+				writel(TW_COMMAND_OFFSET + command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
+			}
+		}
+		tw_dev->state[request_id] = TW_S_POSTED;
+		tw_dev->posted_request_count++;
+		if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
+			tw_dev->max_posted_request_count = tw_dev->posted_request_count;
+		}
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twa_post_command_packet() */
+
+/* This function will reset a device extension */
+static int twa_reset_device_extension(TW_Device_Extension *tw_dev)
+{
+	int i = 0;
+	int retval = 1;
+	unsigned long flags = 0;
+
+	set_bit(TW_IN_RESET, &tw_dev->flags);
+	TW_DISABLE_INTERRUPTS(tw_dev);
+	TW_MASK_COMMAND_INTERRUPT(tw_dev);
+	spin_lock_irqsave(tw_dev->host->host_lock, flags);
+
+	/* Abort all requests that are in progress */
+	for (i = 0; i < TW_Q_LENGTH; i++) {
+		if ((tw_dev->state[i] != TW_S_FINISHED) &&
+		    (tw_dev->state[i] != TW_S_INITIAL) &&
+		    (tw_dev->state[i] != TW_S_COMPLETED)) {
+			if (tw_dev->srb[i]) {
+				struct scsi_cmnd *cmd = tw_dev->srb[i];
+
+				cmd->result = (DID_RESET << 16);
+				if (twa_command_mapped(cmd))
+					scsi_dma_unmap(cmd);
+				scsi_done(cmd);
+			}
+		}
+	}
+
+	/* Reset queues and counts */
+	for (i = 0; i < TW_Q_LENGTH; i++) {
+		tw_dev->free_queue[i] = i;
+		tw_dev->state[i] = TW_S_INITIAL;
+	}
+	tw_dev->free_head = TW_Q_START;
+	tw_dev->free_tail = TW_Q_START;
+	tw_dev->posted_request_count = 0;
+	tw_dev->pending_request_count = 0;
+	tw_dev->pending_head = TW_Q_START;
+	tw_dev->pending_tail = TW_Q_START;
+	tw_dev->reset_print = 0;
+
+	spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+
+	if (twa_reset_sequence(tw_dev, 1))
+		goto out;
+
+	TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
+	clear_bit(TW_IN_RESET, &tw_dev->flags);
+	tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
+
+	retval = 0;
+out:
+	return retval;
+} /* End twa_reset_device_extension() */
+
+/* This function will reset a controller */
+static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
+{
+	int tries = 0, retval = 1, flashed = 0, do_soft_reset = soft_reset;
+
+	while (tries < TW_MAX_RESET_TRIES) {
+		if (do_soft_reset) {
+			TW_SOFT_RESET(tw_dev);
+			/* Clear pchip/response queue on 9550SX */
+			if (twa_empty_response_queue_large(tw_dev)) {
+				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x36, "Response queue (large) empty failed during reset sequence");
+				do_soft_reset = 1;
+				tries++;
+				continue;
+			}
+		}
+
+		/* Make sure controller is in a good state */
+		if (twa_poll_status(tw_dev, TW_STATUS_MICROCONTROLLER_READY | (do_soft_reset == 1 ? TW_STATUS_ATTENTION_INTERRUPT : 0), 60)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Microcontroller not ready during reset sequence");
+			do_soft_reset = 1;
+			tries++;
+			continue;
+		}
+
+		/* Empty response queue */
+		if (twa_empty_response_queue(tw_dev)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Response queue empty failed during reset sequence");
+			do_soft_reset = 1;
+			tries++;
+			continue;
+		}
+
+		flashed = 0;
+
+		/* Check for compatibility/flash */
+		if (twa_check_srl(tw_dev, &flashed)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Compatibility check failed during reset sequence");
+			do_soft_reset = 1;
+			tries++;
+			continue;
+		} else {
+			if (flashed) {
+				tries++;
+				continue;
+			}
+		}
+
+		/* Drain the AEN queue */
+		if (twa_aen_drain_queue(tw_dev, soft_reset)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x22, "AEN drain failed during reset sequence");
+			do_soft_reset = 1;
+			tries++;
+			continue;
+		}
+
+		/* If we got here, controller is in a good state */
+		retval = 0;
+		goto out;
+	}
+out:
+	return retval;
+} /* End twa_reset_sequence() */
+
+/* This funciton returns unit geometry in cylinders/heads/sectors */
+static int twa_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[])
+{
+	int heads, sectors, cylinders;
+
+	if (capacity >= 0x200000) {
+		heads = 255;
+		sectors = 63;
+		cylinders = sector_div(capacity, heads * sectors);
+	} else {
+		heads = 64;
+		sectors = 32;
+		cylinders = sector_div(capacity, heads * sectors);
+	}
+
+	geom[0] = heads;
+	geom[1] = sectors;
+	geom[2] = cylinders;
+
+	return 0;
+} /* End twa_scsi_biosparam() */
+
+/* This is the new scsi eh reset function */
+static int twa_scsi_eh_reset(struct scsi_cmnd *SCpnt)
+{
+	TW_Device_Extension *tw_dev = NULL;
+	int retval = FAILED;
+
+	tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
+
+	tw_dev->num_resets++;
+
+	sdev_printk(KERN_WARNING, SCpnt->device,
+		"WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n",
+		TW_DRIVER, 0x2c, SCpnt->cmnd[0]);
+
+	/* Make sure we are not issuing an ioctl or resetting from ioctl */
+	mutex_lock(&tw_dev->ioctl_lock);
+
+	/* Now reset the card and some of the device extension data */
+	if (twa_reset_device_extension(tw_dev)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2b, "Controller reset failed during scsi host reset");
+		goto out;
+	}
+
+	retval = SUCCESS;
+out:
+	mutex_unlock(&tw_dev->ioctl_lock);
+	return retval;
+} /* End twa_scsi_eh_reset() */
+
+/* This is the main scsi queue function to handle scsi opcodes */
+static int twa_scsi_queue_lck(struct scsi_cmnd *SCpnt)
+{
+	void (*done)(struct scsi_cmnd *) = scsi_done;
+	int request_id, retval;
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
+
+	/* If we are resetting due to timed out ioctl, report as busy */
+	if (test_bit(TW_IN_RESET, &tw_dev->flags)) {
+		retval = SCSI_MLQUEUE_HOST_BUSY;
+		goto out;
+	}
+
+	/* Check if this FW supports luns */
+	if ((SCpnt->device->lun != 0) && (tw_dev->tw_compat_info.working_srl < TW_FW_SRL_LUNS_SUPPORTED)) {
+		SCpnt->result = (DID_BAD_TARGET << 16);
+		done(SCpnt);
+		retval = 0;
+		goto out;
+	}
+
+	/* Get a free request id */
+	twa_get_request_id(tw_dev, &request_id);
+
+	/* Save the scsi command for use by the ISR */
+	tw_dev->srb[request_id] = SCpnt;
+
+	retval = twa_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
+	switch (retval) {
+	case SCSI_MLQUEUE_HOST_BUSY:
+		if (twa_command_mapped(SCpnt))
+			scsi_dma_unmap(SCpnt);
+		twa_free_request_id(tw_dev, request_id);
+		break;
+	case 1:
+		SCpnt->result = (DID_ERROR << 16);
+		if (twa_command_mapped(SCpnt))
+			scsi_dma_unmap(SCpnt);
+		done(SCpnt);
+		tw_dev->state[request_id] = TW_S_COMPLETED;
+		twa_free_request_id(tw_dev, request_id);
+		retval = 0;
+	}
+out:
+	return retval;
+} /* End twa_scsi_queue() */
+
+static DEF_SCSI_QCMD(twa_scsi_queue)
+
+/* This function hands scsi cdb's to the firmware */
+static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id,
+				   unsigned char *cdb, int use_sg,
+				   TW_SG_Entry *sglistarg)
+{
+	TW_Command_Full *full_command_packet;
+	TW_Command_Apache *command_packet;
+	u32 num_sectors = 0x0;
+	int i, sg_count;
+	struct scsi_cmnd *srb = NULL;
+	struct scatterlist *sg;
+	int retval = 1;
+
+	if (tw_dev->srb[request_id])
+		srb = tw_dev->srb[request_id];
+
+	/* Initialize command packet */
+	full_command_packet = tw_dev->command_packet_virt[request_id];
+	full_command_packet->header.header_desc.size_header = 128;
+	full_command_packet->header.status_block.error = 0;
+	full_command_packet->header.status_block.severity__reserved = 0;
+
+	command_packet = &full_command_packet->command.newcommand;
+	command_packet->status = 0;
+	command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI);
+
+	/* We forced 16 byte cdb use earlier */
+	if (!cdb)
+		memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN);
+	else
+		memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN);
+
+	if (srb) {
+		command_packet->unit = srb->device->id;
+		command_packet->request_id__lunl =
+			TW_REQ_LUN_IN(srb->device->lun, request_id);
+	} else {
+		command_packet->request_id__lunl =
+			TW_REQ_LUN_IN(0, request_id);
+		command_packet->unit = 0;
+	}
+
+	command_packet->sgl_offset = 16;
+
+	if (!sglistarg) {
+		/* Map sglist from scsi layer to cmd packet */
+
+		if (scsi_sg_count(srb)) {
+			if (!twa_command_mapped(srb)) {
+				if (srb->sc_data_direction == DMA_TO_DEVICE ||
+				    srb->sc_data_direction == DMA_BIDIRECTIONAL)
+					scsi_sg_copy_to_buffer(srb,
+							       tw_dev->generic_buffer_virt[request_id],
+							       TW_SECTOR_SIZE);
+				command_packet->sg_list[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
+				command_packet->sg_list[0].length = cpu_to_le32(TW_MIN_SGL_LENGTH);
+			} else {
+				sg_count = scsi_dma_map(srb);
+				if (sg_count < 0)
+					goto out;
+
+				scsi_for_each_sg(srb, sg, sg_count, i) {
+					command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg));
+					command_packet->sg_list[i].length = cpu_to_le32(sg_dma_len(sg));
+					if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
+						TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2e, "Found unaligned sgl address during execute scsi");
+						goto out;
+					}
+				}
+			}
+			command_packet->sgl_entries__lunh = TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id]));
+		}
+	} else {
+		/* Internal cdb post */
+		for (i = 0; i < use_sg; i++) {
+			command_packet->sg_list[i].address = sglistarg[i].address;
+			command_packet->sg_list[i].length = sglistarg[i].length;
+			if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
+				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2f, "Found unaligned sgl address during internal post");
+				goto out;
+			}
+		}
+		command_packet->sgl_entries__lunh = TW_REQ_LUN_IN(0, use_sg);
+	}
+
+	if (srb) {
+		if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6)
+			num_sectors = (u32)srb->cmnd[4];
+
+		if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10)
+			num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
+	}
+
+	/* Update sector statistic */
+	tw_dev->sector_count = num_sectors;
+	if (tw_dev->sector_count > tw_dev->max_sector_count)
+		tw_dev->max_sector_count = tw_dev->sector_count;
+
+	/* Update SG statistics */
+	if (srb) {
+		tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
+		if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
+			tw_dev->max_sgl_entries = tw_dev->sgl_entries;
+	}
+
+	/* Now post the command to the board */
+	if (srb) {
+		retval = twa_post_command_packet(tw_dev, request_id, 0);
+	} else {
+		twa_post_command_packet(tw_dev, request_id, 1);
+		retval = 0;
+	}
+out:
+	return retval;
+} /* End twa_scsiop_execute_scsi() */
+
+/* This function completes an execute scsi operation */
+static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id)
+{
+	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
+
+	if (!twa_command_mapped(cmd) &&
+	    (cmd->sc_data_direction == DMA_FROM_DEVICE ||
+	     cmd->sc_data_direction == DMA_BIDIRECTIONAL)) {
+		if (scsi_sg_count(cmd) == 1) {
+			void *buf = tw_dev->generic_buffer_virt[request_id];
+
+			scsi_sg_copy_from_buffer(cmd, buf, TW_SECTOR_SIZE);
+		}
+	}
+} /* End twa_scsiop_execute_scsi_complete() */
+
+/* This function tells the controller to shut down */
+static void __twa_shutdown(TW_Device_Extension *tw_dev)
+{
+	/* Disable interrupts */
+	TW_DISABLE_INTERRUPTS(tw_dev);
+
+	/* Free up the IRQ */
+	free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
+
+	printk(KERN_WARNING "3w-9xxx: Shutting down host %d.\n", tw_dev->host->host_no);
+
+	/* Tell the card we are shutting down */
+	if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x31, "Connection shutdown failed");
+	} else {
+		printk(KERN_WARNING "3w-9xxx: Shutdown complete.\n");
+	}
+
+	/* Clear all interrupts just before exit */
+	TW_CLEAR_ALL_INTERRUPTS(tw_dev);
+} /* End __twa_shutdown() */
+
+/* Wrapper for __twa_shutdown */
+static void twa_shutdown(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	__twa_shutdown(tw_dev);
+} /* End twa_shutdown() */
+
+/* This function will look up a string */
+static char *twa_string_lookup(twa_message_type *table, unsigned int code)
+{
+	int index;
+
+	for (index = 0; ((code != table[index].code) &&
+		      (table[index].text != (char *)0)); index++);
+	return(table[index].text);
+} /* End twa_string_lookup() */
+
+/* This function gets called when a disk is coming on-line */
+static int twa_slave_configure(struct scsi_device *sdev)
+{
+	/* Force 60 second timeout */
+	blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
+
+	return 0;
+} /* End twa_slave_configure() */
+
+/* scsi_host_template initializer */
+static struct scsi_host_template driver_template = {
+	.module			= THIS_MODULE,
+	.name			= "3ware 9000 Storage Controller",
+	.queuecommand		= twa_scsi_queue,
+	.eh_host_reset_handler	= twa_scsi_eh_reset,
+	.bios_param		= twa_scsi_biosparam,
+	.change_queue_depth	= scsi_change_queue_depth,
+	.can_queue		= TW_Q_LENGTH-2,
+	.slave_configure	= twa_slave_configure,
+	.this_id		= -1,
+	.sg_tablesize		= TW_APACHE_MAX_SGL_LENGTH,
+	.max_sectors		= TW_MAX_SECTORS,
+	.cmd_per_lun		= TW_MAX_CMDS_PER_LUN,
+	.shost_groups		= twa_host_groups,
+	.emulated		= 1,
+	.no_write_same		= 1,
+};
+
+/* This function will probe and initialize a card */
+static int twa_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
+{
+	struct Scsi_Host *host = NULL;
+	TW_Device_Extension *tw_dev;
+	unsigned long mem_addr, mem_len;
+	int retval;
+
+	retval = pci_enable_device(pdev);
+	if (retval) {
+		TW_PRINTK(host, TW_DRIVER, 0x34, "Failed to enable pci device");
+		return -ENODEV;
+	}
+
+	pci_set_master(pdev);
+	pci_try_set_mwi(pdev);
+
+	retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (retval)
+		retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (retval) {
+		TW_PRINTK(host, TW_DRIVER, 0x23, "Failed to set dma mask");
+		retval = -ENODEV;
+		goto out_disable_device;
+	}
+
+	host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
+	if (!host) {
+		TW_PRINTK(host, TW_DRIVER, 0x24, "Failed to allocate memory for device extension");
+		retval = -ENOMEM;
+		goto out_disable_device;
+	}
+	tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	/* Save values to device extension */
+	tw_dev->host = host;
+	tw_dev->tw_pci_dev = pdev;
+
+	if (twa_initialize_device_extension(tw_dev)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x25, "Failed to initialize device extension");
+		retval = -ENOMEM;
+		goto out_free_device_extension;
+	}
+
+	/* Request IO regions */
+	retval = pci_request_regions(pdev, "3w-9xxx");
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Failed to get mem region");
+		goto out_free_device_extension;
+	}
+
+	if (pdev->device == PCI_DEVICE_ID_3WARE_9000) {
+		mem_addr = pci_resource_start(pdev, 1);
+		mem_len = pci_resource_len(pdev, 1);
+	} else {
+		mem_addr = pci_resource_start(pdev, 2);
+		mem_len = pci_resource_len(pdev, 2);
+	}
+
+	/* Save base address */
+	tw_dev->base_addr = ioremap(mem_addr, mem_len);
+	if (!tw_dev->base_addr) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x35, "Failed to ioremap");
+		retval = -ENOMEM;
+		goto out_release_mem_region;
+	}
+
+	/* Disable interrupts on the card */
+	TW_DISABLE_INTERRUPTS(tw_dev);
+
+	/* Initialize the card */
+	if (twa_reset_sequence(tw_dev, 0)) {
+		retval = -ENOMEM;
+		goto out_iounmap;
+	}
+
+	/* Set host specific parameters */
+	if ((pdev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
+	    (pdev->device == PCI_DEVICE_ID_3WARE_9690SA))
+		host->max_id = TW_MAX_UNITS_9650SE;
+	else
+		host->max_id = TW_MAX_UNITS;
+
+	host->max_cmd_len = TW_MAX_CDB_LEN;
+
+	/* Channels aren't supported by adapter */
+	host->max_lun = TW_MAX_LUNS(tw_dev->tw_compat_info.working_srl);
+	host->max_channel = 0;
+
+	/* Register the card with the kernel SCSI layer */
+	retval = scsi_add_host(host, &pdev->dev);
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x27, "scsi add host failed");
+		goto out_iounmap;
+	}
+
+	pci_set_drvdata(pdev, host);
+
+	printk(KERN_WARNING "3w-9xxx: scsi%d: Found a 3ware 9000 Storage Controller at 0x%lx, IRQ: %d.\n",
+	       host->host_no, mem_addr, pdev->irq);
+	printk(KERN_WARNING "3w-9xxx: scsi%d: Firmware %s, BIOS %s, Ports: %d.\n",
+	       host->host_no,
+	       (char *)twa_get_param(tw_dev, 0, TW_VERSION_TABLE,
+				     TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
+	       (char *)twa_get_param(tw_dev, 1, TW_VERSION_TABLE,
+				     TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
+	       le32_to_cpu(*(__le32 *)twa_get_param(tw_dev, 2, TW_INFORMATION_TABLE,
+				     TW_PARAM_PORTCOUNT, TW_PARAM_PORTCOUNT_LENGTH)));
+
+	/* Try to enable MSI */
+	if (use_msi && (pdev->device != PCI_DEVICE_ID_3WARE_9000) &&
+	    !pci_enable_msi(pdev))
+		set_bit(TW_USING_MSI, &tw_dev->flags);
+
+	/* Now setup the interrupt handler */
+	retval = request_irq(pdev->irq, twa_interrupt, IRQF_SHARED, "3w-9xxx", tw_dev);
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x30, "Error requesting IRQ");
+		goto out_remove_host;
+	}
+
+	twa_device_extension_list[twa_device_extension_count] = tw_dev;
+	twa_device_extension_count++;
+
+	/* Re-enable interrupts on the card */
+	TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
+
+	/* Finally, scan the host */
+	scsi_scan_host(host);
+
+	if (twa_major == -1) {
+		if ((twa_major = register_chrdev (0, "twa", &twa_fops)) < 0)
+			TW_PRINTK(host, TW_DRIVER, 0x29, "Failed to register character device");
+	}
+	return 0;
+
+out_remove_host:
+	if (test_bit(TW_USING_MSI, &tw_dev->flags))
+		pci_disable_msi(pdev);
+	scsi_remove_host(host);
+out_iounmap:
+	iounmap(tw_dev->base_addr);
+out_release_mem_region:
+	pci_release_regions(pdev);
+out_free_device_extension:
+	twa_free_device_extension(tw_dev);
+	scsi_host_put(host);
+out_disable_device:
+	pci_disable_device(pdev);
+
+	return retval;
+} /* End twa_probe() */
+
+/* This function is called to remove a device */
+static void twa_remove(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	scsi_remove_host(tw_dev->host);
+
+	/* Unregister character device */
+	if (twa_major >= 0) {
+		unregister_chrdev(twa_major, "twa");
+		twa_major = -1;
+	}
+
+	/* Shutdown the card */
+	__twa_shutdown(tw_dev);
+
+	/* Disable MSI if enabled */
+	if (test_bit(TW_USING_MSI, &tw_dev->flags))
+		pci_disable_msi(pdev);
+
+	/* Free IO remapping */
+	iounmap(tw_dev->base_addr);
+
+	/* Free up the mem region */
+	pci_release_regions(pdev);
+
+	/* Free up device extension resources */
+	twa_free_device_extension(tw_dev);
+
+	scsi_host_put(tw_dev->host);
+	pci_disable_device(pdev);
+	twa_device_extension_count--;
+} /* End twa_remove() */
+
+/* This function is called on PCI suspend */
+static int __maybe_unused twa_suspend(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	printk(KERN_WARNING "3w-9xxx: Suspending host %d.\n", tw_dev->host->host_no);
+
+	TW_DISABLE_INTERRUPTS(tw_dev);
+	free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
+
+	if (test_bit(TW_USING_MSI, &tw_dev->flags))
+		pci_disable_msi(pdev);
+
+	/* Tell the card we are shutting down */
+	if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x38, "Connection shutdown failed during suspend");
+	} else {
+		printk(KERN_WARNING "3w-9xxx: Suspend complete.\n");
+	}
+	TW_CLEAR_ALL_INTERRUPTS(tw_dev);
+
+	return 0;
+} /* End twa_suspend() */
+
+/* This function is called on PCI resume */
+static int __maybe_unused twa_resume(struct device *dev)
+{
+	int retval = 0;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	printk(KERN_WARNING "3w-9xxx: Resuming host %d.\n", tw_dev->host->host_no);
+
+	pci_try_set_mwi(pdev);
+
+	retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (retval)
+		retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (retval) {
+		TW_PRINTK(host, TW_DRIVER, 0x40, "Failed to set dma mask during resume");
+		retval = -ENODEV;
+		goto out_disable_device;
+	}
+
+	/* Initialize the card */
+	if (twa_reset_sequence(tw_dev, 0)) {
+		retval = -ENODEV;
+		goto out_disable_device;
+	}
+
+	/* Now setup the interrupt handler */
+	retval = request_irq(pdev->irq, twa_interrupt, IRQF_SHARED, "3w-9xxx", tw_dev);
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x42, "Error requesting IRQ during resume");
+		retval = -ENODEV;
+		goto out_disable_device;
+	}
+
+	/* Now enable MSI if enabled */
+	if (test_bit(TW_USING_MSI, &tw_dev->flags))
+		pci_enable_msi(pdev);
+
+	/* Re-enable interrupts on the card */
+	TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
+
+	printk(KERN_WARNING "3w-9xxx: Resume complete.\n");
+	return 0;
+
+out_disable_device:
+	scsi_remove_host(host);
+
+	return retval;
+} /* End twa_resume() */
+
+/* PCI Devices supported by this driver */
+static struct pci_device_id twa_pci_tbl[] = {
+	{ PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9000,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9550SX,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9650SE,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9690SA,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ }
+};
+MODULE_DEVICE_TABLE(pci, twa_pci_tbl);
+
+static SIMPLE_DEV_PM_OPS(twa_pm_ops, twa_suspend, twa_resume);
+
+/* pci_driver initializer */
+static struct pci_driver twa_driver = {
+	.name		= "3w-9xxx",
+	.id_table	= twa_pci_tbl,
+	.probe		= twa_probe,
+	.remove		= twa_remove,
+	.driver.pm	= &twa_pm_ops,
+	.shutdown	= twa_shutdown
+};
+
+/* This function is called on driver initialization */
+static int __init twa_init(void)
+{
+	printk(KERN_WARNING "3ware 9000 Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
+
+	return pci_register_driver(&twa_driver);
+} /* End twa_init() */
+
+/* This function is called on driver exit */
+static void __exit twa_exit(void)
+{
+	pci_unregister_driver(&twa_driver);
+} /* End twa_exit() */
+
+module_init(twa_init);
+module_exit(twa_exit);
+