[PATCH] Add new driver for LSI 3ware 9750

[PATCH] Add new driver for LSI 3ware 9750

[adam radford]

[-- Attachment #1: Type: text/plain, Size: 79213 bytes --]

James, linux-scsi,

This patch adds a new driver '3w-sas' for the LSI 3ware 9750 6Gb/s
SAS/SATA-RAID controllers.

- I have tested this code to work on 32-bit, 64-bit, PAE, PPC-64.
- This code contains a legacy interface that works with open-source
smartmontools software at
  http://sourceforge.net/projects/smartmontools.

Signed-off-by: Adam Radford <aradford@gmail.com>

-Adam

Note: This patch is included in-line below and also as an attachment
(in case vger truncates the 2363 line
patch).

diff -Naur linux-2.6.32-rc5-git1/drivers/scsi/3w-sas.c
linux-2.6.32-rc5-git1.new/drivers/scsi/3w-sas.c
--- linux-2.6.32-rc5-git1/drivers/scsi/3w-sas.c	1969-12-31
16:00:00.000000000 -0800
+++ linux-2.6.32-rc5-git1.new/drivers/scsi/3w-sas.c	2009-10-19
17:07:42.000000000 -0700
@@ -0,0 +1,1927 @@
+/*
+   3w-sas.c -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux.
+
+   Written By: Adam Radford <linuxraid@lsi.com>
+
+   Copyright (C) 2009 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
+
+   Controllers supported by this driver:
+
+   LSI 3ware 9750 6Gb/s SAS/SATA-RAID
+
+   Bugs/Comments/Suggestions should be mailed to:
+   linuxraid@lsi.com
+
+   For more information, goto:
+   http://www.lsi.com
+
+   History
+   -------
+   3.26.02.000 - Initial driver release.
+*/
+
+#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/smp_lock.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_cmnd.h>
+#include "3w-sas.h"
+
+/* Globals */
+#define TW_DRIVER_VERSION "3.26.02.000"
+static TW_Device_Extension *twl_device_extension_list[TW_MAX_SLOT];
+static unsigned int twl_device_extension_count;
+static int twl_major = -1;
+extern struct timezone sys_tz;
+
+/* Module parameters */
+MODULE_AUTHOR ("LSI");
+MODULE_DESCRIPTION ("LSI 3ware SAS/SATA-RAID 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 int twl_reset_device_extension(TW_Device_Extension *tw_dev,
int ioctl_reset);
+
+/* Functions */
+
+/* This function returns AENs through sysfs */
+static ssize_t twl_sysfs_aen_read(struct kobject *kobj,
+				  struct bin_attribute *bin_attr,
+				  char *outbuf, loff_t offset, size_t count)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct Scsi_Host *shost = class_to_shost(dev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata;
+	unsigned long flags = 0;
+	ssize_t ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+
+	spin_lock_irqsave(tw_dev->host->host_lock, flags);
+	ret = memory_read_from_buffer(outbuf, count, &offset,
tw_dev->event_queue[0], sizeof(TW_Event) * TW_Q_LENGTH);
+	spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+
+	return ret;
+} /* End twl_sysfs_aen_read() */
+
+/* aen_read sysfs attribute initializer */
+static struct bin_attribute twl_sysfs_aen_read_attr = {
+	.attr = {
+		.name = "3ware_aen_read",
+		.mode = S_IRUSR,
+	},
+	.size = 0,
+	.read = twl_sysfs_aen_read
+};
+
+/* This function returns driver compatibility info through sysfs */
+static ssize_t twl_sysfs_compat_info(struct kobject *kobj,
+				     struct bin_attribute *bin_attr,
+				     char *outbuf, loff_t offset, size_t count)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct Scsi_Host *shost = class_to_shost(dev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata;
+	unsigned long flags = 0;
+	ssize_t ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+
+	spin_lock_irqsave(tw_dev->host->host_lock, flags);
+	ret = memory_read_from_buffer(outbuf, count, &offset,
&tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info));
+	spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+
+	return ret;
+} /* End twl_sysfs_compat_info() */
+
+/* compat_info sysfs attribute initializer */
+static struct bin_attribute twl_sysfs_compat_info_attr = {
+	.attr = {
+		.name = "3ware_compat_info",
+		.mode = S_IRUSR,
+	},
+	.size = 0,
+	.read = twl_sysfs_compat_info
+};
+
+/* Show some statistics about the card */
+static ssize_t twl_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-sas Driver version: %s\n"
+		       "Current commands posted:   %4d\n"
+		       "Max commands posted:       %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->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 twl_show_stats() */
+
+/* This function will set a devices queue depth */
+static int twl_change_queue_depth(struct scsi_device *sdev, int queue_depth)
+{
+	if (queue_depth > TW_Q_LENGTH-2)
+		queue_depth = TW_Q_LENGTH-2;
+	scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
+	return queue_depth;
+} /* End twl_change_queue_depth() */
+
+/* stats sysfs attribute initializer */
+static struct device_attribute twl_host_stats_attr = {
+	.attr = {
+		.name = 	"3ware_stats",
+		.mode =		S_IRUGO,
+	},
+	.show = twl_show_stats
+};
+
+/* Host attributes initializer */
+static struct device_attribute *twl_host_attrs[] = {
+	&twl_host_stats_attr,
+	NULL,
+};
+
+/* This function will look up an AEN severity string */
+static char *twl_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 = twl_aen_severity_table[severity_code];
+out:
+	return retval;
+} /* End twl_aen_severity_lookup() */
+
+/* This function will queue an event */
+static void twl_aen_queue_event(TW_Device_Extension *tw_dev,
TW_Command_Apache_Header *header)
+{
+	u32 local_time;
+	struct timeval 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];
+
+	host[0] = '\0';
+	if (tw_dev->host)
+		sprintf(host, " scsi%d:", tw_dev->host->host_no);
+
+	aen = le16_to_cpu(header->status_block.error);
+	memset(event, 0, sizeof(TW_Event));
+
+	event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
+	do_gettimeofday(&time);
+	local_time = (u32)(time.tv_sec - (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 + 1 + strlen(error_str));
+	if (event->severity != TW_AEN_SEVERITY_DEBUG)
+		printk(KERN_WARNING "3w-sas:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
+		       host,
+		       twl_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
+		       TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, error_str,
+		       header->err_specific_desc);
+	else
+		tw_dev->aen_count--;
+
+	tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
+} /* End twl_aen_queue_event() */
+
+/* This function will attempt to post a command packet to the board */
+static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
+{
+	dma_addr_t command_que_value;
+
+	command_que_value = tw_dev->command_packet_phys[request_id];
+	command_que_value += TW_COMMAND_OFFSET;
+
+	/* First write upper 4 bytes */
+	writel((u32)((u64)command_que_value >> 32), TWL_HIBQPH_REG_ADDR(tw_dev));
+	/* Then the lower 4 bytes */
+	writel((u32)(command_que_value | TWL_PULL_MODE), TWL_HIBQPL_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;
+
+	return 0;
+} /* End twl_post_command_packet() */
+
+/* This function will perform a pci-dma mapping for a scatter gather list */
+static int twl_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)
+{
+	int use_sg;
+	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
+
+	use_sg = scsi_dma_map(cmd);
+	if (!use_sg)
+		return 0;
+	else if (use_sg < 0) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Failed to map scatter gather list");
+		return 0;
+	}
+
+	cmd->SCp.phase = TW_PHASE_SGLIST;
+	cmd->SCp.have_data_in = use_sg;
+
+	return use_sg;
+} /* End twl_map_scsi_sg_data() */
+
+/* This function hands scsi cdb's to the firmware */
+static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int
request_id, char *cdb, int use_sg, TW_SG_Entry_ISO *sglistarg)
+{
+	TW_Command_Full *full_command_packet;
+	TW_Command_Apache *command_packet;
+	int i, sg_count;
+	struct scsi_cmnd *srb = NULL;
+	struct scatterlist *sglist = NULL, *sg;
+	int retval = 1;
+
+	if (tw_dev->srb[request_id]) {
+		srb = tw_dev->srb[request_id];
+		if (scsi_sglist(srb))
+			sglist = scsi_sglist(srb);
+	}
+
+	/* 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 =
+			cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id));
+	} else {
+		command_packet->request_id__lunl =
+			cpu_to_le16(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)) {
+			sg_count = twl_map_scsi_sg_data(tw_dev, request_id);
+			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 = TW_CPU_TO_SGL(sg_dma_len(sg));
+			}
+			command_packet->sgl_entries__lunh =
cpu_to_le16(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 = TW_CPU_TO_SGL(sglistarg[i].address);
+			command_packet->sg_list[i].length = TW_CPU_TO_SGL(sglistarg[i].length);
+		}
+		command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg));
+	}
+
+	/* Update some stats */
+	if (srb) {
+		tw_dev->sector_count = scsi_bufflen(srb) / 512;
+		if (tw_dev->sector_count > tw_dev->max_sector_count)
+			tw_dev->max_sector_count = tw_dev->sector_count;
+		tw_dev->sgl_entries = scsi_sg_count(srb);
+		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 */
+	retval = twl_post_command_packet(tw_dev, request_id);
+
+out:
+	return retval;
+} /* End twl_scsiop_execute_scsi() */
+
+/* This function will read the aen queue from the isr */
+static int twl_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
+{
+	char cdb[TW_MAX_CDB_LEN];
+	TW_SG_Entry_ISO 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_ISO));
+	sglist[0].length = TW_SECTOR_SIZE;
+	sglist[0].address = tw_dev->generic_buffer_phys[request_id];
+
+	/* Mark internal command */
+	tw_dev->srb[request_id] = NULL;
+
+	/* Now post the command packet */
+	if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Post failed while reading
AEN queue");
+		goto out;
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twl_aen_read_queue() */
+
+/* This function will sync firmware time with the host time */
+static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
+{
+	u32 schedulertime;
+	struct timeval utc;
+	TW_Command_Full *full_command_packet;
+	TW_Command *command_packet;
+	TW_Param_Apache *param;
+	u32 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 =
TW_CPU_TO_SGL(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 */
+	do_gettimeofday(&utc);
+	local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
+	schedulertime = local_time - (3 * 86400);
+	schedulertime = cpu_to_le32(schedulertime % 604800);
+
+	memcpy(param->data, &schedulertime, sizeof(u32));
+
+	/* Mark internal command */
+	tw_dev->srb[request_id] = NULL;
+
+	/* Now post the command */
+	twl_post_command_packet(tw_dev, request_id);
+} /* End twl_aen_sync_time() */
+
+/* This function will assign an available request id */
+static void twl_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 twl_get_request_id() */
+
+/* This function will free a request id */
+static void twl_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 twl_free_request_id() */
+
+/* This function will complete an aen request from the isr */
+static int twl_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 (twl_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:
+		twl_aen_sync_time(tw_dev, request_id);
+		retval = 0;
+		goto out;
+	default:
+		twl_aen_queue_event(tw_dev, header);
+
+		/* If there are more aen's, keep reading the queue */
+		if (twl_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;
+	twl_free_request_id(tw_dev, request_id);
+	clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
+out:
+	return retval;
+} /* End twl_aen_complete() */
+
+/* This function will poll for a response */
+static int twl_poll_response(TW_Device_Extension *tw_dev, int
request_id, int seconds)
+{
+	unsigned long before;
+	dma_addr_t mfa;
+	u32 regh, regl;
+	u32 response;
+	int retval = 1;
+	int found = 0;
+
+	before = jiffies;
+
+	while (!found) {
+		if (sizeof(dma_addr_t) > 4) {
+			regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
+			regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
+			mfa = ((u64)regh << 32) | regl;
+		} else
+			mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
+
+		response = (u32)mfa;
+
+		if (TW_RESID_OUT(response) == request_id)
+			found = 1;
+
+		if (time_after(jiffies, before + HZ * seconds))
+			goto out;
+
+		msleep(50);
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twl_poll_response() */
+
+/* This function will drain the aen queue */
+static int twl_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
+{
+	int request_id = 0;
+	char cdb[TW_MAX_CDB_LEN];
+	TW_SG_Entry_ISO 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_ISO));
+	sglist[0].length = TW_SECTOR_SIZE;
+	sglist[0].address = tw_dev->generic_buffer_phys[request_id];
+
+	/* Mark internal command */
+	tw_dev->srb[request_id] = NULL;
+
+	do {
+		/* Send command to the board */
+		if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "Error posting request sense");
+			goto out;
+		}
+
+		/* Now poll for completion */
+		if (twl_poll_response(tw_dev, request_id, 30)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "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)
+			twl_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 twl_aen_drain_queue() */
+
+/* This function will allocate memory and check if it is correctly aligned */
+static int twl_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 = pci_alloc_consistent(tw_dev->tw_pci_dev,
size*TW_Q_LENGTH, &dma_handle);
+	if (!cpu_addr) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
+		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;
+		case 2:
+			tw_dev->sense_buffer_phys[i] = dma_handle+(i*size);
+			tw_dev->sense_buffer_virt[i] = (TW_Command_Apache_Header
*)((unsigned char *)cpu_addr + (i*size));
+			break;
+		}
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twl_allocate_memory() */
+
+/* This function will load the request id and various sgls for ioctls */
+static void twl_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_ISO *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 =
+			cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl),
request_id));
+		newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle +
sizeof(TW_Ioctl_Buf_Apache) - 1);
+		newcommand->sg_list[0].length = TW_CPU_TO_SGL(length);
+		newcommand->sgl_entries__lunh =
+			cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), 1));
+	} else {
+		oldcommand = &full_command_packet->command.oldcommand;
+		oldcommand->request_id = request_id;
+
+		if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
+			/* Load the sg list */
+			sgl = (TW_SG_Entry_ISO *)((u32 *)oldcommand+oldcommand->size -
(sizeof(TW_SG_Entry_ISO)/4) + pae + (sizeof(dma_addr_t) > 4 ? 1 : 0));
+			sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
+			sgl->length = TW_CPU_TO_SGL(length);
+			oldcommand->size += pae;
+			oldcommand->size += sizeof(dma_addr_t) > 4 ? 1 : 0;
+		}
+	}
+} /* End twl_load_sgl() */
+
+/* This function handles ioctl for the character device
+   This interface is used by smartmontools open source software */
+static int twl_chrdev_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
+{
+	long timeout;
+	unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
+	dma_addr_t dma_handle;
+	int request_id = 0;
+	TW_Ioctl_Driver_Command driver_command;
+	TW_Ioctl_Buf_Apache *tw_ioctl;
+	TW_Command_Full *full_command_packet;
+	TW_Device_Extension *tw_dev = twl_device_extension_list[iminor(inode)];
+	int retval = -EFAULT;
+	void __user *argp = (void __user *)arg;
+
+	/* Only let one of these through at a time */
+	if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
+		retval = -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 = -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,
data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1,
&dma_handle, GFP_KERNEL);
+	if (!cpu_addr) {
+		retval = -ENOMEM;
+		goto out2;
+	}
+
+	tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
+
+	/* Now copy down the entire ioctl */
+	if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length +
sizeof(TW_Ioctl_Buf_Apache) - 1))
+		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);
+		twl_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_Command_Full *)&tw_ioctl->firmware_command;
+
+		/* Load request id and sglist for both command types */
+		twl_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 */
+		twl_post_command_packet(tw_dev, request_id);
+		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-sas: scsi%d: WARNING: (0x%02X:0x%04X):
Character ioctl (0x%x) timed out, resetting card.\n",
+			       tw_dev->host->host_no, TW_DRIVER, 0x6,
+			       cmd);
+			retval = -EIO;
+			twl_reset_device_extension(tw_dev, 1);
+			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;
+		twl_free_request_id(tw_dev, request_id);
+		spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+		break;
+	default:
+		retval = -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 - 1) == 0)
+		retval = 0;
+out3:
+	/* Now free ioctl buf memory */
+	dma_free_coherent(&tw_dev->tw_pci_dev->dev,
data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr,
dma_handle);
+out2:
+	mutex_unlock(&tw_dev->ioctl_lock);
+out:
+	return retval;
+} /* End twl_chrdev_ioctl() */
+
+/* This function handles open for the character device */
+static int twl_chrdev_open(struct inode *inode, struct file *file)
+{
+	unsigned int minor_number;
+	int retval = -ENODEV;
+
+	if (!capable(CAP_SYS_ADMIN)) {
+		retval = -EACCES;
+		goto out;
+	}
+
+	cycle_kernel_lock();
+	minor_number = iminor(inode);
+	if (minor_number >= twl_device_extension_count)
+		goto out;
+	retval = 0;
+out:
+	return retval;
+} /* End twl_chrdev_open() */
+
+/* File operations struct for character device */
+static const struct file_operations twl_fops = {
+	.owner		= THIS_MODULE,
+	.ioctl		= twl_chrdev_ioctl,
+	.open		= twl_chrdev_open,
+	.release	= NULL
+};
+
+/* This function passes sense data from firmware to scsi layer */
+static int twl_fill_sense(TW_Device_Extension *tw_dev, int i, int
request_id, int copy_sense, int print_host)
+{
+	TW_Command_Apache_Header *header;
+	TW_Command_Full *full_command_packet;
+	unsigned short error;
+	char *error_str;
+	int retval = 1;
+
+	header = tw_dev->sense_buffer_virt[i];
+	full_command_packet = tw_dev->command_packet_virt[request_id];
+
+	/* Get embedded firmware error string */
+	error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)
+ 1]);
+
+	/* Don't print error for Logical unit not supported during rollcall */
+	error = le16_to_cpu(header->status_block.error);
+	if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error !=
TW_ERROR_UNIT_OFFLINE) && (error != TW_ERROR_INVALID_FIELD_IN_CDB)) {
+		if (print_host)
+			printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
+			       tw_dev->host->host_no,
+			       TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
+			       header->status_block.error,
+			       error_str,
+			       header->err_specific_desc);
+		else
+			printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s:%s.\n",
+			       TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
+			       header->status_block.error,
+			       error_str,
+			       header->err_specific_desc);
+	}
+
+	if (copy_sense) {
+		memcpy(tw_dev->srb[request_id]->sense_buffer, header->sense_data,
TW_SENSE_DATA_LENGTH);
+		tw_dev->srb[request_id]->result =
(full_command_packet->command.newcommand.status << 1);
+		goto out;
+	}
+out:
+	return retval;
+} /* End twl_fill_sense() */
+
+/* This function will free up device extension resources */
+static void twl_free_device_extension(TW_Device_Extension *tw_dev)
+{
+	if (tw_dev->command_packet_virt[0])
+		pci_free_consistent(tw_dev->tw_pci_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])
+		pci_free_consistent(tw_dev->tw_pci_dev,
+				    TW_SECTOR_SIZE*TW_Q_LENGTH,
+				    tw_dev->generic_buffer_virt[0],
+				    tw_dev->generic_buffer_phys[0]);
+
+	if (tw_dev->sense_buffer_virt[0])
+		pci_free_consistent(tw_dev->tw_pci_dev,
+				    sizeof(TW_Command_Apache_Header)*
+				    TW_Q_LENGTH,
+				    tw_dev->sense_buffer_virt[0],
+				    tw_dev->sense_buffer_phys[0]);
+
+	kfree(tw_dev->event_queue[0]);
+} /* End twl_free_device_extension() */
+
+/* This function will get parameter table entries from the firmware */
+static void *twl_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 =
TW_CPU_TO_SGL(TW_SECTOR_SIZE);
+
+	/* Post the command packet to the board */
+	twl_post_command_packet(tw_dev, request_id);
+
+	/* Poll for completion */
+	if (twl_poll_response(tw_dev, request_id, 30))
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "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 twl_get_param() */
+
+/* This function will send an initconnection command to controller */
+static int twl_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);
+	tw_initconnect->features = set_features;
+
+	/* Turn on 64-bit sgl support if we need to */
+	tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
+
+	tw_initconnect->features = cpu_to_le32(tw_initconnect->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 */
+	twl_post_command_packet(tw_dev, request_id);
+
+	/* Poll for completion */
+	if (twl_poll_response(tw_dev, request_id, 30)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x8, "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 twl_initconnection() */
+
+/* This function will initialize the fields of a device extension */
+static int twl_initialize_device_extension(TW_Device_Extension *tw_dev)
+{
+	int i, retval = 1;
+
+	/* Initialize command packet buffers */
+	if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x9, "Command packet memory
allocation failed");
+		goto out;
+	}
+
+	/* Initialize generic buffer */
+	if (twl_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Generic memory allocation failed");
+		goto out;
+	}
+
+	/* Allocate sense buffers */
+	if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Apache_Header), 2)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xb, "Sense buffer 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, 0xc, "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->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 twl_initialize_device_extension() */
+
+/* This function will perform a pci-dma unmap */
+static void twl_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)
+{
+	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
+
+	if (cmd->SCp.phase == TW_PHASE_SGLIST)
+		scsi_dma_unmap(cmd);
+} /* End twl_unmap_scsi_data() */
+
+/* This function will handle attention interrupts */
+static int twl_handle_attention_interrupt(TW_Device_Extension *tw_dev)
+{
+	int retval = 1;
+	u32 request_id, doorbell;
+
+	/* Read doorbell status */
+	doorbell = readl(TWL_HOBDB_REG_ADDR(tw_dev));
+
+	/* Check for controller errors */
+	if (doorbell & TWL_DOORBELL_CONTROLLER_ERROR) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "Microcontroller Error: clearing");
+		goto out;
+	}
+
+	/* Check if we need to perform an AEN drain */
+	if (doorbell & TWL_DOORBELL_ATTENTION_INTERRUPT) {
+		if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
+			twl_get_request_id(tw_dev, &request_id);
+			if (twl_aen_read_queue(tw_dev, request_id)) {
+				tw_dev->state[request_id] = TW_S_COMPLETED;
+				twl_free_request_id(tw_dev, request_id);
+				clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
+			}
+		}
+	}
+
+	retval = 0;
+out:
+	/* Clear doorbell interrupt */
+	TWL_CLEAR_DB_INTERRUPT(tw_dev);
+
+	/* Make sure the clear was flushed by reading it back */
+	readl(TWL_HOBDBC_REG_ADDR(tw_dev));
+
+	return retval;
+} /* End twl_handle_attention_interrupt() */
+
+/* Interrupt service routine */
+static irqreturn_t twl_interrupt(int irq, void *dev_instance)
+{
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
+	int i, handled = 0, error = 0;
+	dma_addr_t mfa = 0;
+	u32 reg, regl, regh, response, request_id = 0;
+	struct scsi_cmnd *cmd;
+	TW_Command_Full *full_command_packet;
+
+	spin_lock(tw_dev->host->host_lock);
+
+	/* Read host interrupt status */
+	reg = readl(TWL_HISTAT_REG_ADDR(tw_dev));
+
+	/* Check if this is our interrupt, otherwise bail */
+	if (!(reg & TWL_HISTATUS_VALID_INTERRUPT))
+		goto twl_interrupt_bail;
+
+	handled = 1;
+
+	/* If we are resetting, bail */
+	if (test_bit(TW_IN_RESET, &tw_dev->flags))
+		goto twl_interrupt_bail;
+
+	/* Attention interrupt */
+	if (reg & TWL_HISTATUS_ATTENTION_INTERRUPT) {
+		if (twl_handle_attention_interrupt(tw_dev)) {
+			TWL_MASK_INTERRUPTS(tw_dev);
+			goto twl_interrupt_bail;
+		}
+	}
+
+	/* Response interrupt */
+	while (reg & TWL_HISTATUS_RESPONSE_INTERRUPT) {
+		if (sizeof(dma_addr_t) > 4) {
+			regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
+			regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
+			mfa = ((u64)regh << 32) | regl;
+		} else
+			mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
+
+		error = 0;
+		response = (u32)mfa;
+
+		/* Check for command packet error */
+		if (!TW_NOTMFA_OUT(response)) {
+			for (i=0;i<TW_Q_LENGTH;i++) {
+				if (tw_dev->sense_buffer_phys[i] == mfa) {
+					request_id =
le16_to_cpu(tw_dev->sense_buffer_virt[i]->header_desc.request_id);
+					if (tw_dev->srb[request_id] != NULL)
+						error = twl_fill_sense(tw_dev, i, request_id, 1, 1);
+					else {
+						/* Skip ioctl error prints */
+						if (request_id != tw_dev->chrdev_request_id)
+							error = twl_fill_sense(tw_dev, i, request_id, 0, 1);
+						else
+							memcpy(tw_dev->command_packet_virt[request_id],
tw_dev->sense_buffer_virt[i], sizeof(TW_Command_Apache_Header));
+					}
+
+					/* Now re-post the sense buffer */
+					writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32),
TWL_HOBQPH_REG_ADDR(tw_dev));
+					writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev));
+					break;
+				}
+			}
+		} else
+			request_id = TW_RESID_OUT(response);
+
+		full_command_packet = tw_dev->command_packet_virt[request_id];
+
+		/* 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, 0xe, "Received a request id
that wasn't posted");
+				TWL_MASK_INTERRUPTS(tw_dev);
+				goto twl_interrupt_bail;
+			}
+		}
+
+		/* Check for internal command completion */
+		if (tw_dev->srb[request_id] == NULL) {
+			if (request_id != tw_dev->chrdev_request_id) {
+				if (twl_aen_complete(tw_dev, request_id))
+					TW_PRINTK(tw_dev->host, TW_DRIVER, 0xf, "Error completing AEN
during attention interrupt");
+			} else {
+				tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
+				wake_up(&tw_dev->ioctl_wqueue);
+			}
+		} else {
+			cmd = tw_dev->srb[request_id];
+
+			if (!error)
+				cmd->result = (DID_OK << 16);
+			
+			/* Report residual bytes for single sgl */
+			if ((scsi_sg_count(cmd) <= 1) &&
(full_command_packet->command.newcommand.status == 0)) {
+				if (full_command_packet->command.newcommand.sg_list[0].length <
scsi_bufflen(tw_dev->srb[request_id]))
+					scsi_set_resid(cmd, scsi_bufflen(cmd) -
full_command_packet->command.newcommand.sg_list[0].length);
+			}
+
+			/* Now complete the io */
+			tw_dev->state[request_id] = TW_S_COMPLETED;
+			twl_free_request_id(tw_dev, request_id);
+			tw_dev->posted_request_count--;
+			tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
+			twl_unmap_scsi_data(tw_dev, request_id);
+		}
+
+		/* Check for another response interrupt */
+		reg = readl(TWL_HISTAT_REG_ADDR(tw_dev));
+	}
+
+twl_interrupt_bail:
+	spin_unlock(tw_dev->host->host_lock);
+	return IRQ_RETVAL(handled);
+} /* End twl_interrupt() */
+
+/* This function will poll for a register change */
+static int twl_poll_register(TW_Device_Extension *tw_dev, void *reg,
u32 value, u32 result, int seconds)
+{
+	unsigned long before;
+	int retval = 1;
+	u32 reg_value;
+
+	reg_value = readl(reg);
+	before = jiffies;
+
+        while ((reg_value & value) != result) {
+		reg_value = readl(reg);
+		if (time_after(jiffies, before + HZ * seconds))
+			goto out;
+		msleep(50);
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twl_poll_register() */
+
+/* This function will reset a controller */
+static int twl_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
+{
+	int retval = 1;
+	int i = 0;
+	u32 status = 0;
+	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;
+	int tries = 0;
+	int do_soft_reset = soft_reset;
+
+	while (tries < TW_MAX_RESET_TRIES) {
+		/* Do a soft reset if one is needed */
+		if (do_soft_reset) {
+			TWL_SOFT_RESET(tw_dev);
+
+			/* Make sure controller is in a good state */
+			if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev),
TWL_CONTROLLER_READY, 0x0, 30)) {
+				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Controller never went
non-ready during reset sequence");
+				tries++;
+				continue;
+			}
+			if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev),
TWL_CONTROLLER_READY, TWL_CONTROLLER_READY, 60)) {
+				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x11, "Controller not ready
during reset sequence");
+				tries++;
+				continue;
+			}
+		}
+
+		/* Initconnect */
+		if (twl_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
+				       TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
+				       TW_9750_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, 0x12, "Initconnection failed
while checking SRL");
+			do_soft_reset = 1;
+			tries++;
+			continue;
+		}
+
+		/* Load sense buffers */
+		while (i < TW_Q_LENGTH) {
+			writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32),
TWL_HOBQPH_REG_ADDR(tw_dev));
+			writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev));
+
+			/* Check status for over-run after each write */
+			status = readl(TWL_STATUS_REG_ADDR(tw_dev));
+			if (!(status & TWL_STATUS_OVERRUN_SUBMIT))
+			    i++;
+		}
+
+		/* Now check status */
+		status = readl(TWL_STATUS_REG_ADDR(tw_dev));
+		if (status) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "Bad controller status
after loading sense buffers");
+			do_soft_reset = 1;
+			tries++;
+			continue;
+		}
+
+		/* Drain the AEN queue */
+		if (twl_aen_drain_queue(tw_dev, soft_reset)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x14, "AEN drain failed during
reset sequence");
+			do_soft_reset = 1;
+			tries++;
+			continue;
+		}
+
+		/* Load rest of compatibility struct */
+		strncpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION,
strlen(TW_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;
+
+		/* If we got here, controller is in a good state */
+		retval = 0;
+		goto out;
+	}
+out:
+	return retval;
+} /* End twl_reset_sequence() */
+
+/* This function will reset a device extension */
+static int twl_reset_device_extension(TW_Device_Extension *tw_dev,
int ioctl_reset)
+{
+	int i = 0, retval = 1;
+	unsigned long flags = 0;
+
+	/* Block SCSI requests while we are resetting */
+	if (ioctl_reset)
+		scsi_block_requests(tw_dev->host);
+
+	set_bit(TW_IN_RESET, &tw_dev->flags);
+	TWL_MASK_INTERRUPTS(tw_dev);
+	TWL_CLEAR_DB_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]) {
+				tw_dev->srb[i]->result = (DID_RESET << 16);
+				tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
+				twl_unmap_scsi_data(tw_dev, i);
+			}
+		}
+	}
+
+	/* 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;
+
+	spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+
+	if (twl_reset_sequence(tw_dev, 1))
+		goto out;
+
+	TWL_UNMASK_INTERRUPTS(tw_dev);
+
+	clear_bit(TW_IN_RESET, &tw_dev->flags);
+	tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
+
+	retval = 0;
+out:
+	if (ioctl_reset)
+		scsi_unblock_requests(tw_dev->host);
+	return retval;
+} /* End twl_reset_device_extension() */
+
+/* This funciton returns unit geometry in cylinders/heads/sectors */
+static int twl_scsi_biosparam(struct scsi_device *sdev, struct
block_device *bdev, sector_t capacity, int geom[])
+{
+	int heads, sectors, cylinders;
+	TW_Device_Extension *tw_dev;
+
+	tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
+
+	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 twl_scsi_biosparam() */
+
+/* This is the new scsi eh reset function */
+static int twl_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 (twl_reset_device_extension(tw_dev, 0)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "Controller reset failed
during scsi host reset");
+		goto out;
+	}
+
+	retval = SUCCESS;
+out:
+	mutex_unlock(&tw_dev->ioctl_lock);
+	return retval;
+} /* End twl_scsi_eh_reset() */
+
+/* This is the main scsi queue function to handle scsi opcodes */
+static int twl_scsi_queue(struct scsi_cmnd *SCpnt, void
(*done)(struct scsi_cmnd *))
+{
+	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;
+	}
+
+	/* Save done function into scsi_cmnd struct */
+	SCpnt->scsi_done = done;
+		
+	/* Get a free request id */
+	twl_get_request_id(tw_dev, &request_id);
+
+	/* Save the scsi command for use by the ISR */
+	tw_dev->srb[request_id] = SCpnt;
+
+	/* Initialize phase to zero */
+	SCpnt->SCp.phase = TW_PHASE_INITIAL;
+
+	retval = twl_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
+	if (retval) {
+		tw_dev->state[request_id] = TW_S_COMPLETED;
+		twl_free_request_id(tw_dev, request_id);
+		SCpnt->result = (DID_ERROR << 16);
+		done(SCpnt);
+		retval = 0;
+	}
+out:
+	return retval;
+} /* End twl_scsi_queue() */
+
+/* This function tells the controller to shut down */
+static void __twl_shutdown(TW_Device_Extension *tw_dev)
+{
+	/* Disable interrupts */
+	TWL_MASK_INTERRUPTS(tw_dev);
+
+	/* Free up the IRQ */
+	free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
+
+	printk(KERN_WARNING "3w-sas: Shutting down host %d.\n",
tw_dev->host->host_no);
+
+	/* Tell the card we are shutting down */
+	if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL,
NULL, NULL)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Connection shutdown failed");
+	} else {
+		printk(KERN_WARNING "3w-sas: Shutdown complete.\n");
+	}
+
+	/* Clear doorbell interrupt just before exit */
+	TWL_CLEAR_DB_INTERRUPT(tw_dev);
+} /* End __twl_shutdown() */
+
+/* Wrapper for __twl_shutdown */
+static void twl_shutdown(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev;
+
+	if (!host)
+		return;
+
+	tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	if (tw_dev->online)
+		__twl_shutdown(tw_dev);
+} /* End twl_shutdown() */
+
+/* This function configures unit settings when a unit is coming on-line */
+static int twl_slave_configure(struct scsi_device *sdev)
+{
+	/* Force 60 second timeout */
+	blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
+
+	return 0;
+} /* End twl_slave_configure() */
+
+/* scsi_host_template initializer */
+static struct scsi_host_template driver_template = {
+	.module			= THIS_MODULE,
+	.name			= "3w-sas",
+	.queuecommand		= twl_scsi_queue,
+	.eh_host_reset_handler	= twl_scsi_eh_reset,
+	.bios_param		= twl_scsi_biosparam,
+	.change_queue_depth	= twl_change_queue_depth,
+	.can_queue		= TW_Q_LENGTH-2,
+	.slave_configure	= twl_slave_configure,
+	.this_id		= -1,
+	.sg_tablesize		= TW_LIBERATOR_MAX_SGL_LENGTH,
+	.max_sectors		= TW_MAX_SECTORS,
+	.cmd_per_lun		= TW_MAX_CMDS_PER_LUN,
+	.use_clustering		= ENABLE_CLUSTERING,
+	.shost_attrs		= twl_host_attrs,
+	.emulated		= 1
+};
+
+/* This function will probe and initialize a card */
+static int __devinit twl_probe(struct pci_dev *pdev, const struct
pci_device_id *dev_id)
+{
+	struct Scsi_Host *host = NULL;
+	TW_Device_Extension *tw_dev;
+	resource_size_t mem_addr, mem_len;
+	int retval = -ENODEV;
+	int *ptr_phycount, phycount=0;
+
+	retval = pci_enable_device(pdev);
+	if (retval) {
+		TW_PRINTK(host, TW_DRIVER, 0x17, "Failed to enable pci device");
+		goto out_disable_device;
+	}
+
+	pci_set_master(pdev);
+	pci_try_set_mwi(pdev);
+
+	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
+	    || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
+		if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
+		    || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
+			TW_PRINTK(host, TW_DRIVER, 0x18, "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, 0x19, "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 (twl_initialize_device_extension(tw_dev)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Failed to initialize
device extension");
+		goto out_free_device_extension;
+	}
+
+	/* Request IO regions */
+	retval = pci_request_regions(pdev, "3w-sas");
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Failed to get mem region");
+		goto out_free_device_extension;
+	}
+
+	/* Use region 1 */
+	mem_addr = pci_resource_start(pdev, 1);
+	mem_len = pci_resource_len(pdev, 1);
+
+	/* Save base address */
+	tw_dev->base_addr = ioremap(mem_addr, mem_len);
+
+	if (!tw_dev->base_addr) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to ioremap");
+		goto out_release_mem_region;
+	}
+
+	/* Disable interrupts on the card */
+	TWL_MASK_INTERRUPTS(tw_dev);
+
+	/* Initialize the card */
+	if (twl_reset_sequence(tw_dev, 0)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Controller reset failed
during probe");
+		goto out_iounmap;
+	}
+
+	/* Set host specific parameters */
+	host->max_id = TW_MAX_UNITS;
+	host->max_cmd_len = TW_MAX_CDB_LEN;
+	host->max_lun = TW_MAX_LUNS;
+	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, 0x1e, "scsi add host failed");
+		goto out_iounmap;
+	}
+
+	pci_set_drvdata(pdev, host);
+
+	printk(KERN_WARNING "3w-sas: scsi%d: Found an LSI 3ware %s
Controller at 0x%llx, IRQ: %d.\n",
+	       host->host_no,
+	       (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
+				     TW_PARAM_MODEL, TW_PARAM_MODEL_LENGTH),
+	       (u64)mem_addr, pdev->irq);
+
+	ptr_phycount = twl_get_param(tw_dev, 2, TW_PARAM_PHY_SUMMARY_TABLE,
+				     TW_PARAM_PHYCOUNT, TW_PARAM_PHYCOUNT_LENGTH);
+	if (ptr_phycount)
+		phycount = le32_to_cpu(*(int *)ptr_phycount);
+
+	printk(KERN_WARNING "3w-sas: scsi%d: Firmware %s, BIOS %s, Phys: %d.\n",
+	       host->host_no,
+	       (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
+				     TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
+	       (char *)twl_get_param(tw_dev, 2, TW_VERSION_TABLE,
+				     TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
+	       phycount);
+
+	/* Try to enable MSI */
+	if (use_msi && !pci_enable_msi(pdev))
+		set_bit(TW_USING_MSI, &tw_dev->flags);
+
+	/* Now setup the interrupt handler */
+	retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev);
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ");
+		goto out_remove_host;
+	}
+
+	twl_device_extension_list[twl_device_extension_count] = tw_dev;
+	twl_device_extension_count++;
+
+	/* Re-enable interrupts on the card */
+	TWL_UNMASK_INTERRUPTS(tw_dev);
+	
+	/* Finally, scan the host */
+	scsi_scan_host(host);
+
+	/* Add sysfs binary files */
+	if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr))
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Failed to create sysfs
binary file: 3ware_aen_read");
+	if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr))
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Failed to create sysfs
binary file: 3ware_compat_info");
+
+	if (twl_major == -1) {
+		if ((twl_major = register_chrdev (0, "twl", &twl_fops)) < 0)
+			TW_PRINTK(host, TW_DRIVER, 0x22, "Failed to register character device");
+	}
+	tw_dev->online = 1;
+	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:
+	twl_free_device_extension(tw_dev);
+	scsi_host_put(host);
+out_disable_device:
+	pci_disable_device(pdev);
+
+	return retval;
+} /* End twl_probe() */
+
+/* This function is called to remove a device */
+static void twl_remove(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev;
+
+	if (!host)
+		return;
+
+	tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	if (!tw_dev->online)
+		return;
+
+	/* Remove sysfs binary files */
+	sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr);
+	sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr);
+
+	scsi_remove_host(tw_dev->host);
+
+	/* Unregister character device */
+	if (twl_major >= 0) {
+		unregister_chrdev(twl_major, "twl");
+		twl_major = -1;
+	}
+
+	/* Shutdown the card */
+	__twl_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 */
+	twl_free_device_extension(tw_dev);
+
+	scsi_host_put(tw_dev->host);
+	pci_disable_device(pdev);
+	twl_device_extension_count--;
+} /* End twl_remove() */
+
+#ifdef CONFIG_PM
+/* This function is called on PCI suspend */
+static int twl_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	printk(KERN_WARNING "3w-sas: Suspending host %d.\n", tw_dev->host->host_no);
+	/* Disable interrupts */
+	TWL_MASK_INTERRUPTS(tw_dev);
+
+	free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
+
+	/* Tell the card we are shutting down */
+	if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL,
NULL, NULL)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x23, "Connection shutdown
failed during suspend");
+	} else {
+		printk(KERN_WARNING "3w-sas: Suspend complete.\n");
+	}
+
+	/* Clear doorbell interrupt */
+	TWL_CLEAR_DB_INTERRUPT(tw_dev);
+
+	pci_save_state(pdev);
+	pci_disable_device(pdev);
+	pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+	return 0;
+} /* End twl_suspend() */
+
+/* This function is called on PCI resume */
+static int twl_resume(struct pci_dev *pdev)
+{
+	int retval = 0;
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	printk(KERN_WARNING "3w-sas: Resuming host %d.\n", tw_dev->host->host_no);
+	pci_set_power_state(pdev, PCI_D0);
+	pci_enable_wake(pdev, PCI_D0, 0);
+	pci_restore_state(pdev);
+
+	retval = pci_enable_device(pdev);
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x24, "Enable device failed
during resume");
+		return retval;
+	}
+
+	pci_set_master(pdev);
+	pci_try_set_mwi(pdev);
+
+	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
+	    || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
+		if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
+		    || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
+			TW_PRINTK(host, TW_DRIVER, 0x25, "Failed to set dma mask during resume");
+			retval = -ENODEV;
+			goto out_disable_device;
+		}
+
+	/* Initialize the card */
+	if (twl_reset_sequence(tw_dev, 0)) {
+		retval = -ENODEV;
+		goto out_disable_device;
+	}
+
+	/* Now setup the interrupt handler */
+	retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev);
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "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 */
+	TWL_UNMASK_INTERRUPTS(tw_dev);
+
+	printk(KERN_WARNING "3w-sas: Resume complete.\n");
+	return 0;
+
+out_disable_device:
+	scsi_remove_host(host);
+	pci_disable_device(pdev);
+
+	return retval;
+} /* End twl_resume() */
+#endif
+
+/* PCI Devices supported by this driver */
+static struct pci_device_id twl_pci_tbl[] __devinitdata = {
+	{ PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9750,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ }
+};
+MODULE_DEVICE_TABLE(pci, twl_pci_tbl);
+
+/* pci_driver initializer */
+static struct pci_driver twl_driver = {
+	.name		= "3w-sas",
+	.id_table	= twl_pci_tbl,
+	.probe		= twl_probe,
+	.remove		= twl_remove,
+#ifdef CONFIG_PM
+	.suspend	= twl_suspend,
+	.resume		= twl_resume,
+#endif
+	.shutdown	= twl_shutdown
+};
+
+/* This function is called on driver initialization */
+static int __init twl_init(void)
+{
+	printk(KERN_WARNING "LSI 3ware SAS/SATA-RAID Controller device
driver for Linux v%s.\n", TW_DRIVER_VERSION);
+
+	return pci_register_driver(&twl_driver);
+} /* End twl_init() */
+
+/* This function is called on driver exit */
+static void __exit twl_exit(void)
+{
+	pci_unregister_driver(&twl_driver);
+} /* End twl_exit() */
+
+module_init(twl_init);
+module_exit(twl_exit);
+
diff -Naur linux-2.6.32-rc5-git1/drivers/scsi/3w-sas.h
linux-2.6.32-rc5-git1.new/drivers/scsi/3w-sas.h
--- linux-2.6.32-rc5-git1/drivers/scsi/3w-sas.h	1969-12-31
16:00:00.000000000 -0800
+++ linux-2.6.32-rc5-git1.new/drivers/scsi/3w-sas.h	2009-10-19
17:07:44.000000000 -0700
@@ -0,0 +1,396 @@
+/*
+   3w-sas.h -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux.
+
+   Written By: Adam Radford <linuxraid@lsi.com>
+
+   Copyright (C) 2009 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:
+   linuxraid@lsi.com
+
+   For more information, goto:
+   http://www.lsi.com
+*/
+
+#ifndef _3W_SAS_H
+#define _3W_SAS_H
+
+/* AEN severity table */
+static char *twl_aen_severity_table[] =
+{
+	"None", "ERROR", "WARNING", "INFO", "DEBUG", (char*) 0
+};
+
+/* Liberator register offsets */
+#define TWL_STATUS                         0x0  /* Status */
+#define TWL_HIBDB                          0x20 /* Inbound doorbell */
+#define TWL_HISTAT                         0x30 /* Host interrupt status */
+#define TWL_HIMASK                         0x34 /* Host interrupt mask */
+#define TWL_HOBDB			   0x9C /* Outbound doorbell */
+#define TWL_HOBDBC                         0xA0 /* Outbound doorbell clear */
+#define TWL_SCRPD3                         0xBC /* Scratchpad */
+#define TWL_HIBQPL                         0xC0 /* Host inbound Q low */
+#define TWL_HIBQPH                         0xC4 /* Host inbound Q high */
+#define TWL_HOBQPL                         0xC8 /* Host outbound Q low */
+#define TWL_HOBQPH                         0xCC /* Host outbound Q high */
+#define TWL_HISTATUS_VALID_INTERRUPT	   0xC
+#define TWL_HISTATUS_ATTENTION_INTERRUPT   0x4
+#define TWL_HISTATUS_RESPONSE_INTERRUPT	   0x8
+#define TWL_STATUS_OVERRUN_SUBMIT	   0x2000
+#define TWL_ISSUE_SOFT_RESET		   0x100
+#define TWL_CONTROLLER_READY		   0x2000
+#define TWL_DOORBELL_CONTROLLER_ERROR	   0x200000
+#define TWL_DOORBELL_ATTENTION_INTERRUPT   0x40000
+#define TWL_PULL_MODE			   0x1
+
+/* Command packet opcodes used by the driver */
+#define TW_OP_INIT_CONNECTION 0x1
+#define TW_OP_GET_PARAM	      0x12
+#define TW_OP_SET_PARAM	      0x13
+#define TW_OP_EXECUTE_SCSI    0x10
+
+/* Asynchronous Event Notification (AEN) codes used by the driver */
+#define TW_AEN_QUEUE_EMPTY       0x0000
+#define TW_AEN_SOFT_RESET        0x0001
+#define TW_AEN_SYNC_TIME_WITH_HOST 0x031
+#define TW_AEN_SEVERITY_ERROR    0x1
+#define TW_AEN_SEVERITY_DEBUG    0x4
+#define TW_AEN_NOT_RETRIEVED 0x1
+
+/* Command state defines */
+#define TW_S_INITIAL   0x1  /* Initial state */
+#define TW_S_STARTED   0x2  /* Id in use */
+#define TW_S_POSTED    0x4  /* Posted to the controller */
+#define TW_S_COMPLETED 0x8  /* Completed by isr */
+#define TW_S_FINISHED  0x10 /* I/O completely done */
+
+/* Compatibility defines */
+#define TW_9750_ARCH_ID 10
+#define TW_CURRENT_DRIVER_SRL 40
+#define TW_CURRENT_DRIVER_BUILD 0
+#define TW_CURRENT_DRIVER_BRANCH 0
+
+/* Phase defines */
+#define TW_PHASE_INITIAL 0
+#define TW_PHASE_SGLIST  2
+
+/* Misc defines */
+#define TW_SECTOR_SIZE                        512
+#define TW_MAX_UNITS			      32
+#define TW_INIT_MESSAGE_CREDITS		      0x100
+#define TW_INIT_COMMAND_PACKET_SIZE	      0x3
+#define TW_INIT_COMMAND_PACKET_SIZE_EXTENDED  0x6
+#define TW_EXTENDED_INIT_CONNECT	      0x2
+#define TW_BASE_FW_SRL			      24
+#define TW_BASE_FW_BRANCH		      0
+#define TW_BASE_FW_BUILD		      1
+#define TW_Q_LENGTH			      256
+#define TW_Q_START			      0
+#define TW_MAX_SLOT			      32
+#define TW_MAX_RESET_TRIES		      2
+#define TW_MAX_CMDS_PER_LUN		      254
+#define TW_MAX_AEN_DRAIN		      255
+#define TW_IN_RESET                           2
+#define TW_USING_MSI			      3
+#define TW_IN_ATTENTION_LOOP		      4
+#define TW_MAX_SECTORS                        256
+#define TW_MAX_CDB_LEN                        16
+#define TW_IOCTL_CHRDEV_TIMEOUT               60 /* 60 seconds */
+#define TW_IOCTL_CHRDEV_FREE                  -1
+#define TW_COMMAND_OFFSET                     128 /* 128 bytes */
+#define TW_VERSION_TABLE                      0x0402
+#define TW_TIMEKEEP_TABLE		      0x040A
+#define TW_INFORMATION_TABLE		      0x0403
+#define TW_PARAM_FWVER			      3
+#define TW_PARAM_FWVER_LENGTH		      16
+#define TW_PARAM_BIOSVER		      4
+#define TW_PARAM_BIOSVER_LENGTH		      16
+#define TW_PARAM_MODEL			      8
+#define TW_PARAM_MODEL_LENGTH		      16
+#define TW_PARAM_PHY_SUMMARY_TABLE	      1
+#define TW_PARAM_PHYCOUNT		      2
+#define TW_PARAM_PHYCOUNT_LENGTH	      1
+#define TW_IOCTL_FIRMWARE_PASS_THROUGH        0x108  // Used by smartmontools
+#define TW_ALLOCATION_LENGTH		      128
+#define TW_SENSE_DATA_LENGTH		      18
+#define TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED   0x10a
+#define TW_ERROR_INVALID_FIELD_IN_CDB	      0x10d
+#define TW_ERROR_UNIT_OFFLINE                 0x128
+#define TW_MESSAGE_SOURCE_CONTROLLER_ERROR    3
+#define TW_MESSAGE_SOURCE_CONTROLLER_EVENT    4
+#define TW_DRIVER 			      6
+#ifndef PCI_DEVICE_ID_3WARE_9750
+#define PCI_DEVICE_ID_3WARE_9750 0x1010
+#endif
+
+/* Bitmask macros to eliminate bitfields */
+
+/* opcode: 5, reserved: 3 */
+#define TW_OPRES_IN(x,y) ((x << 5) | (y & 0x1f))
+#define TW_OP_OUT(x) (x & 0x1f)
+
+/* opcode: 5, sgloffset: 3 */
+#define TW_OPSGL_IN(x,y) ((x << 5) | (y & 0x1f))
+#define TW_SGL_OUT(x) ((x >> 5) & 0x7)
+
+/* severity: 3, reserved: 5 */
+#define TW_SEV_OUT(x) (x & 0x7)
+
+/* not_mfa: 1, reserved: 7, status: 8, request_id: 16 */
+#define TW_RESID_OUT(x) ((x >> 16) & 0xffff)
+#define TW_NOTMFA_OUT(x) (x & 0x1)
+
+/* request_id: 12, lun: 4 */
+#define TW_REQ_LUN_IN(lun, request_id) (((lun << 12) & 0xf000) |
(request_id & 0xfff))
+#define TW_LUN_OUT(lun) ((lun >> 12) & 0xf)
+
+/* Register access macros */
+#define TWL_STATUS_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_STATUS)
+#define TWL_HOBQPL_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_HOBQPL)
+#define TWL_HOBQPH_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_HOBQPH)
+#define TWL_HOBDB_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_HOBDB)
+#define TWL_HOBDBC_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_HOBDBC)
+#define TWL_HIMASK_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_HIMASK)
+#define TWL_HISTAT_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_HISTAT)
+#define TWL_HIBQPH_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_HIBQPH)
+#define TWL_HIBQPL_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_HIBQPL)
+#define TWL_HIBDB_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_HIBDB)
+#define TWL_SCRPD3_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
+ TWL_SCRPD3)
+#define TWL_MASK_INTERRUPTS(x) (writel(~0, TWL_HIMASK_REG_ADDR(tw_dev)))
+#define TWL_UNMASK_INTERRUPTS(x)
(writel(~TWL_HISTATUS_VALID_INTERRUPT, TWL_HIMASK_REG_ADDR(tw_dev)))
+#define TWL_CLEAR_DB_INTERRUPT(x) (writel(~0, TWL_HOBDBC_REG_ADDR(tw_dev)))
+#define TWL_SOFT_RESET(x) (writel(TWL_ISSUE_SOFT_RESET,
TWL_HIBDB_REG_ADDR(tw_dev)))
+
+/* Macros */
+#define TW_PRINTK(h,a,b,c) { \
+if (h) \
+printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X):
%s.\n",h->host_no,a,b,c); \
+else \
+printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s.\n",a,b,c); \
+}
+#define TW_MAX_LUNS 16
+#define TW_COMMAND_SIZE (sizeof(dma_addr_t) > 4 ? 6 : 4)
+#define TW_LIBERATOR_MAX_SGL_LENGTH (sizeof(dma_addr_t) > 4 ? 46 : 92)
+#define TW_LIBERATOR_MAX_SGL_LENGTH_OLD (sizeof(dma_addr_t) > 4 ? 47 : 94)
+#define TW_PADDING_LENGTH_LIBERATOR 136
+#define TW_PADDING_LENGTH_LIBERATOR_OLD 132
+#define TW_CPU_TO_SGL(x) (sizeof(dma_addr_t) > 4 ? cpu_to_le64(x) :
cpu_to_le32(x))
+
+#pragma pack(1)
+
+/* SGL entry */
+typedef struct TAG_TW_SG_Entry_ISO {
+	dma_addr_t address;
+	dma_addr_t length;
+} TW_SG_Entry_ISO;
+
+/* Old Command Packet with ISO SGL */
+typedef struct TW_Command {
+	unsigned char opcode__sgloffset;
+	unsigned char size;
+	unsigned char request_id;
+	unsigned char unit__hostid;
+	/* Second DWORD */
+	unsigned char status;
+	unsigned char flags;
+	union {
+		unsigned short block_count;
+		unsigned short parameter_count;
+	} byte6_offset;
+	union {
+		struct {
+			u32 lba;
+			TW_SG_Entry_ISO sgl[TW_LIBERATOR_MAX_SGL_LENGTH_OLD];
+			unsigned char padding[TW_PADDING_LENGTH_LIBERATOR_OLD];
+		} io;
+		struct {
+			TW_SG_Entry_ISO sgl[TW_LIBERATOR_MAX_SGL_LENGTH_OLD];
+			u32 padding;
+			unsigned char padding2[TW_PADDING_LENGTH_LIBERATOR_OLD];
+		} param;
+	} byte8_offset;
+} TW_Command;
+
+/* New Command Packet with ISO SGL */
+typedef struct TAG_TW_Command_Apache {
+	unsigned char opcode__reserved;
+	unsigned char unit;
+	unsigned short request_id__lunl;
+	unsigned char status;
+	unsigned char sgl_offset;
+	unsigned short sgl_entries__lunh;
+	unsigned char cdb[16];
+	TW_SG_Entry_ISO sg_list[TW_LIBERATOR_MAX_SGL_LENGTH];
+	unsigned char padding[TW_PADDING_LENGTH_LIBERATOR];
+} TW_Command_Apache;
+
+/* New command packet header */
+typedef struct TAG_TW_Command_Apache_Header {
+	unsigned char sense_data[TW_SENSE_DATA_LENGTH];
+	struct {
+		char reserved[4];
+		unsigned short error;
+		unsigned char padding;
+		unsigned char severity__reserved;
+	} status_block;
+	unsigned char err_specific_desc[98];
+	struct {
+		unsigned char size_header;
+		unsigned short request_id;
+		unsigned char size_sense;
+	} header_desc;
+} TW_Command_Apache_Header;
+
+/* This struct is a union of the 2 command packets */
+typedef struct TAG_TW_Command_Full {
+	TW_Command_Apache_Header header;
+	union {
+		TW_Command oldcommand;
+		TW_Command_Apache newcommand;
+	} command;
+} TW_Command_Full;
+
+/* Initconnection structure */
+typedef struct TAG_TW_Initconnect {
+	unsigned char opcode__reserved;
+	unsigned char size;
+	unsigned char request_id;
+	unsigned char res2;
+	unsigned char status;
+	unsigned char flags;
+	unsigned short message_credits;
+	u32 features;
+	unsigned short fw_srl;
+	unsigned short fw_arch_id;
+	unsigned short fw_branch;
+	unsigned short fw_build;
+	u32 result;
+} TW_Initconnect;
+
+/* Event info structure */
+typedef struct TAG_TW_Event
+{
+	unsigned int sequence_id;
+	unsigned int time_stamp_sec;
+	unsigned short aen_code;
+	unsigned char severity;
+	unsigned char retrieved;
+	unsigned char repeat_count;
+	unsigned char parameter_len;
+	unsigned char parameter_data[98];
+} TW_Event;
+
+typedef struct TAG_TW_Ioctl_Driver_Command {
+	unsigned int control_code;
+	unsigned int status;
+	unsigned int unique_id;
+	unsigned int sequence_id;
+	unsigned int os_specific;
+	unsigned int buffer_length;
+} TW_Ioctl_Driver_Command;
+
+typedef struct TAG_TW_Ioctl_Apache {
+	TW_Ioctl_Driver_Command driver_command;
+        char padding[488];
+	TW_Command_Full firmware_command;
+	char data_buffer[1];
+} TW_Ioctl_Buf_Apache;
+
+/* GetParam descriptor */
+typedef struct {
+	unsigned short	table_id;
+	unsigned short	parameter_id;
+	unsigned short	parameter_size_bytes;
+	unsigned short  actual_parameter_size_bytes;
+	unsigned char	data[1];
+} TW_Param_Apache;
+
+/* Compatibility information structure */
+typedef struct TAG_TW_Compatibility_Info
+{
+	char driver_version[32];
+	unsigned short working_srl;
+	unsigned short working_branch;
+	unsigned short working_build;
+	unsigned short driver_srl_high;
+	unsigned short driver_branch_high;
+	unsigned short driver_build_high;
+	unsigned short driver_srl_low;
+	unsigned short driver_branch_low;
+	unsigned short driver_build_low;
+	unsigned short fw_on_ctlr_srl;
+	unsigned short fw_on_ctlr_branch;
+	unsigned short fw_on_ctlr_build;
+} TW_Compatibility_Info;
+
+#pragma pack()
+
+typedef struct TAG_TW_Device_Extension {
+	void                     __iomem *base_addr;
+	unsigned long	       	*generic_buffer_virt[TW_Q_LENGTH];
+	dma_addr_t	       	generic_buffer_phys[TW_Q_LENGTH];
+	TW_Command_Full	       	*command_packet_virt[TW_Q_LENGTH];
+	dma_addr_t		command_packet_phys[TW_Q_LENGTH];
+	TW_Command_Apache_Header *sense_buffer_virt[TW_Q_LENGTH];
+	dma_addr_t		sense_buffer_phys[TW_Q_LENGTH];
+	struct pci_dev		*tw_pci_dev;
+	struct scsi_cmnd	*srb[TW_Q_LENGTH];
+	unsigned char		free_queue[TW_Q_LENGTH];
+	unsigned char		free_head;
+	unsigned char		free_tail;
+	int     		state[TW_Q_LENGTH];
+	unsigned int		posted_request_count;
+	unsigned int		max_posted_request_count;
+	unsigned int		max_sgl_entries;
+	unsigned int		sgl_entries;
+	unsigned int		num_resets;
+	unsigned int		sector_count;
+	unsigned int		max_sector_count;
+	unsigned int		aen_count;
+	struct Scsi_Host	*host;
+	long			flags;
+	TW_Event                *event_queue[TW_Q_LENGTH];
+	unsigned char           error_index;
+	unsigned int            error_sequence_id;
+	int			chrdev_request_id;
+	wait_queue_head_t	ioctl_wqueue;
+	struct mutex		ioctl_lock;
+	TW_Compatibility_Info	tw_compat_info;
+	char			online;
+} TW_Device_Extension;
+
+#endif /* _3W_SAS_H */
+
diff -Naur linux-2.6.32-rc5-git1/drivers/scsi/Kconfig
linux-2.6.32-rc5-git1.new/drivers/scsi/Kconfig
--- linux-2.6.32-rc5-git1/drivers/scsi/Kconfig	2009-10-15
17:41:50.000000000 -0700
+++ linux-2.6.32-rc5-git1.new/drivers/scsi/Kconfig	2009-10-19
17:13:59.000000000 -0700
@@ -399,6 +399,17 @@
 	  Please read the comments at the top of
 	  <file:drivers/scsi/3w-9xxx.c>.

+config SCSI_3W_SAS
+	tristate "3ware 97xx SAS/SATA-RAID support"
+	depends on PCI && SCSI
+	help
+	  This driver supports the LSI 3ware 9750 6Gb/s SAS/SATA-RAID cards.
+
+	  <http://www.lsi.com>
+
+	  Please read the comments at the top of
+	  <file:drivers/scsi/3w-sas.c>.
+
 config SCSI_7000FASST
 	tristate "7000FASST SCSI support"
 	depends on ISA && SCSI && ISA_DMA_API
diff -Naur linux-2.6.32-rc5-git1/drivers/scsi/Makefile
linux-2.6.32-rc5-git1.new/drivers/scsi/Makefile
--- linux-2.6.32-rc5-git1/drivers/scsi/Makefile	2009-10-15
17:41:50.000000000 -0700
+++ linux-2.6.32-rc5-git1.new/drivers/scsi/Makefile	2009-10-19
17:08:30.000000000 -0700
@@ -113,6 +113,7 @@
 obj-$(CONFIG_SCSI_MAC53C94)	+= mac53c94.o
 obj-$(CONFIG_BLK_DEV_3W_XXXX_RAID) += 3w-xxxx.o
 obj-$(CONFIG_SCSI_3W_9XXX)	+= 3w-9xxx.o
+obj-$(CONFIG_SCSI_3W_SAS)	+= 3w-sas.o
 obj-$(CONFIG_SCSI_PPA)		+= ppa.o
 obj-$(CONFIG_SCSI_IMM)		+= imm.o
 obj-$(CONFIG_JAZZ_ESP)		+= esp_scsi.o	jazz_esp.o

[-- Attachment #2: 3ware_linux_2.6.32-rc5-git1.patch --]
[-- Type: application/octet-stream, Size: 78732 bytes --]

diff -Naur linux-2.6.32-rc5-git1/drivers/scsi/3w-sas.c linux-2.6.32-rc5-git1.new/drivers/scsi/3w-sas.c
--- linux-2.6.32-rc5-git1/drivers/scsi/3w-sas.c	1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.32-rc5-git1.new/drivers/scsi/3w-sas.c	2009-10-19 17:07:42.000000000 -0700
@@ -0,0 +1,1927 @@
+/*
+   3w-sas.c -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux.
+
+   Written By: Adam Radford <linuxraid@lsi.com>
+
+   Copyright (C) 2009 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
+
+   Controllers supported by this driver:
+
+   LSI 3ware 9750 6Gb/s SAS/SATA-RAID
+
+   Bugs/Comments/Suggestions should be mailed to:
+   linuxraid@lsi.com
+
+   For more information, goto:
+   http://www.lsi.com
+
+   History
+   -------
+   3.26.02.000 - Initial driver release.
+*/
+
+#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/smp_lock.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_cmnd.h>
+#include "3w-sas.h"
+
+/* Globals */
+#define TW_DRIVER_VERSION "3.26.02.000"
+static TW_Device_Extension *twl_device_extension_list[TW_MAX_SLOT];
+static unsigned int twl_device_extension_count;
+static int twl_major = -1;
+extern struct timezone sys_tz;
+
+/* Module parameters */
+MODULE_AUTHOR ("LSI");
+MODULE_DESCRIPTION ("LSI 3ware SAS/SATA-RAID 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 int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset);
+
+/* Functions */
+
+/* This function returns AENs through sysfs */
+static ssize_t twl_sysfs_aen_read(struct kobject *kobj,
+				  struct bin_attribute *bin_attr,
+				  char *outbuf, loff_t offset, size_t count)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct Scsi_Host *shost = class_to_shost(dev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata;
+	unsigned long flags = 0;
+	ssize_t ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+
+	spin_lock_irqsave(tw_dev->host->host_lock, flags);
+	ret = memory_read_from_buffer(outbuf, count, &offset, tw_dev->event_queue[0], sizeof(TW_Event) * TW_Q_LENGTH);
+	spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+
+	return ret;
+} /* End twl_sysfs_aen_read() */
+
+/* aen_read sysfs attribute initializer */
+static struct bin_attribute twl_sysfs_aen_read_attr = {
+	.attr = {
+		.name = "3ware_aen_read",
+		.mode = S_IRUSR,
+	}, 
+	.size = 0,
+	.read = twl_sysfs_aen_read
+};
+
+/* This function returns driver compatibility info through sysfs */
+static ssize_t twl_sysfs_compat_info(struct kobject *kobj,
+				     struct bin_attribute *bin_attr,
+				     char *outbuf, loff_t offset, size_t count)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct Scsi_Host *shost = class_to_shost(dev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata;
+	unsigned long flags = 0;
+	ssize_t ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+
+	spin_lock_irqsave(tw_dev->host->host_lock, flags);
+	ret = memory_read_from_buffer(outbuf, count, &offset, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info));
+	spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+
+	return ret;
+} /* End twl_sysfs_compat_info() */
+
+/* compat_info sysfs attribute initializer */
+static struct bin_attribute twl_sysfs_compat_info_attr = {
+	.attr = {
+		.name = "3ware_compat_info",
+		.mode = S_IRUSR,
+	}, 
+	.size = 0,
+	.read = twl_sysfs_compat_info
+};
+
+/* Show some statistics about the card */
+static ssize_t twl_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-sas Driver version: %s\n"
+		       "Current commands posted:   %4d\n"
+		       "Max commands posted:       %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->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 twl_show_stats() */
+
+/* This function will set a devices queue depth */
+static int twl_change_queue_depth(struct scsi_device *sdev, int queue_depth)
+{
+	if (queue_depth > TW_Q_LENGTH-2)
+		queue_depth = TW_Q_LENGTH-2;
+	scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
+	return queue_depth;
+} /* End twl_change_queue_depth() */
+
+/* stats sysfs attribute initializer */
+static struct device_attribute twl_host_stats_attr = {
+	.attr = {
+		.name = 	"3ware_stats",
+		.mode =		S_IRUGO,
+	},
+	.show = twl_show_stats
+};
+
+/* Host attributes initializer */
+static struct device_attribute *twl_host_attrs[] = {
+	&twl_host_stats_attr,
+	NULL,
+};
+
+/* This function will look up an AEN severity string */
+static char *twl_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 = twl_aen_severity_table[severity_code];
+out:
+	return retval;
+} /* End twl_aen_severity_lookup() */
+
+/* This function will queue an event */
+static void twl_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
+{
+	u32 local_time;
+	struct timeval 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];
+
+	host[0] = '\0';
+	if (tw_dev->host)
+		sprintf(host, " scsi%d:", tw_dev->host->host_no);
+
+	aen = le16_to_cpu(header->status_block.error);
+	memset(event, 0, sizeof(TW_Event));
+
+	event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
+	do_gettimeofday(&time);
+	local_time = (u32)(time.tv_sec - (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 + 1 + strlen(error_str));
+	if (event->severity != TW_AEN_SEVERITY_DEBUG)
+		printk(KERN_WARNING "3w-sas:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
+		       host,
+		       twl_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
+		       TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, error_str,
+		       header->err_specific_desc);
+	else
+		tw_dev->aen_count--;
+
+	tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
+} /* End twl_aen_queue_event() */
+
+/* This function will attempt to post a command packet to the board */
+static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
+{
+	dma_addr_t command_que_value;
+
+	command_que_value = tw_dev->command_packet_phys[request_id];
+	command_que_value += TW_COMMAND_OFFSET;
+
+	/* First write upper 4 bytes */
+	writel((u32)((u64)command_que_value >> 32), TWL_HIBQPH_REG_ADDR(tw_dev));
+	/* Then the lower 4 bytes */
+	writel((u32)(command_que_value | TWL_PULL_MODE), TWL_HIBQPL_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;
+
+	return 0;
+} /* End twl_post_command_packet() */
+
+/* This function will perform a pci-dma mapping for a scatter gather list */
+static int twl_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)
+{
+	int use_sg;
+	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
+
+	use_sg = scsi_dma_map(cmd);
+	if (!use_sg)
+		return 0;
+	else if (use_sg < 0) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Failed to map scatter gather list");
+		return 0;
+	}
+
+	cmd->SCp.phase = TW_PHASE_SGLIST;
+	cmd->SCp.have_data_in = use_sg;
+
+	return use_sg;
+} /* End twl_map_scsi_sg_data() */
+
+/* This function hands scsi cdb's to the firmware */
+static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry_ISO *sglistarg)
+{
+	TW_Command_Full *full_command_packet;
+	TW_Command_Apache *command_packet;
+	int i, sg_count;
+	struct scsi_cmnd *srb = NULL;
+	struct scatterlist *sglist = NULL, *sg;
+	int retval = 1;
+
+	if (tw_dev->srb[request_id]) {
+		srb = tw_dev->srb[request_id];
+		if (scsi_sglist(srb))
+			sglist = scsi_sglist(srb);
+	}
+
+	/* 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 =
+			cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id));
+	} else {
+		command_packet->request_id__lunl =
+			cpu_to_le16(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)) {
+			sg_count = twl_map_scsi_sg_data(tw_dev, request_id);
+			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 = TW_CPU_TO_SGL(sg_dma_len(sg));
+			}
+			command_packet->sgl_entries__lunh = cpu_to_le16(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 = TW_CPU_TO_SGL(sglistarg[i].address);
+			command_packet->sg_list[i].length = TW_CPU_TO_SGL(sglistarg[i].length);
+		}
+		command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg));
+	}
+
+	/* Update some stats */
+	if (srb) {
+		tw_dev->sector_count = scsi_bufflen(srb) / 512;
+		if (tw_dev->sector_count > tw_dev->max_sector_count)
+			tw_dev->max_sector_count = tw_dev->sector_count;
+		tw_dev->sgl_entries = scsi_sg_count(srb);
+		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 */
+	retval = twl_post_command_packet(tw_dev, request_id);
+
+out:
+	return retval;
+} /* End twl_scsiop_execute_scsi() */
+
+/* This function will read the aen queue from the isr */
+static int twl_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
+{
+	char cdb[TW_MAX_CDB_LEN];
+	TW_SG_Entry_ISO 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_ISO));
+	sglist[0].length = TW_SECTOR_SIZE;
+	sglist[0].address = tw_dev->generic_buffer_phys[request_id];
+
+	/* Mark internal command */
+	tw_dev->srb[request_id] = NULL;
+
+	/* Now post the command packet */
+	if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Post failed while reading AEN queue");
+		goto out;
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twl_aen_read_queue() */
+
+/* This function will sync firmware time with the host time */
+static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
+{
+	u32 schedulertime;
+	struct timeval utc;
+	TW_Command_Full *full_command_packet;
+	TW_Command *command_packet;
+	TW_Param_Apache *param;
+	u32 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 = TW_CPU_TO_SGL(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 */
+	do_gettimeofday(&utc);
+	local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
+	schedulertime = local_time - (3 * 86400);
+	schedulertime = cpu_to_le32(schedulertime % 604800);
+
+	memcpy(param->data, &schedulertime, sizeof(u32));
+
+	/* Mark internal command */
+	tw_dev->srb[request_id] = NULL;
+
+	/* Now post the command */
+	twl_post_command_packet(tw_dev, request_id);
+} /* End twl_aen_sync_time() */
+
+/* This function will assign an available request id */
+static void twl_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 twl_get_request_id() */
+
+/* This function will free a request id */
+static void twl_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 twl_free_request_id() */
+
+/* This function will complete an aen request from the isr */
+static int twl_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 (twl_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:
+		twl_aen_sync_time(tw_dev, request_id);
+		retval = 0;
+		goto out;
+	default:
+		twl_aen_queue_event(tw_dev, header);
+
+		/* If there are more aen's, keep reading the queue */
+		if (twl_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;
+	twl_free_request_id(tw_dev, request_id);
+	clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
+out:
+	return retval;
+} /* End twl_aen_complete() */
+
+/* This function will poll for a response */
+static int twl_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
+{
+	unsigned long before;
+	dma_addr_t mfa;
+	u32 regh, regl;
+	u32 response;
+	int retval = 1;
+	int found = 0;
+
+	before = jiffies;
+
+	while (!found) {
+		if (sizeof(dma_addr_t) > 4) {
+			regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
+			regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
+			mfa = ((u64)regh << 32) | regl;
+		} else
+			mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
+
+		response = (u32)mfa;
+
+		if (TW_RESID_OUT(response) == request_id)
+			found = 1;
+
+		if (time_after(jiffies, before + HZ * seconds))
+			goto out;
+
+		msleep(50);
+	}
+	retval = 0;
+out: 
+	return retval;
+} /* End twl_poll_response() */
+
+/* This function will drain the aen queue */
+static int twl_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
+{
+	int request_id = 0;
+	char cdb[TW_MAX_CDB_LEN];
+	TW_SG_Entry_ISO 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_ISO));
+	sglist[0].length = TW_SECTOR_SIZE;
+	sglist[0].address = tw_dev->generic_buffer_phys[request_id];
+
+	/* Mark internal command */
+	tw_dev->srb[request_id] = NULL;
+
+	do {
+		/* Send command to the board */
+		if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "Error posting request sense");
+			goto out;
+		}
+
+		/* Now poll for completion */
+		if (twl_poll_response(tw_dev, request_id, 30)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "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)
+			twl_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 twl_aen_drain_queue() */
+
+/* This function will allocate memory and check if it is correctly aligned */
+static int twl_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 = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
+	if (!cpu_addr) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
+		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;
+		case 2:
+			tw_dev->sense_buffer_phys[i] = dma_handle+(i*size);
+			tw_dev->sense_buffer_virt[i] = (TW_Command_Apache_Header *)((unsigned char *)cpu_addr + (i*size));
+			break;
+		}
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twl_allocate_memory() */
+
+/* This function will load the request id and various sgls for ioctls */
+static void twl_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_ISO *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 =
+			cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id));
+		newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
+		newcommand->sg_list[0].length = TW_CPU_TO_SGL(length);
+		newcommand->sgl_entries__lunh =
+			cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), 1));
+	} else {
+		oldcommand = &full_command_packet->command.oldcommand;
+		oldcommand->request_id = request_id;
+
+		if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
+			/* Load the sg list */
+			sgl = (TW_SG_Entry_ISO *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry_ISO)/4) + pae + (sizeof(dma_addr_t) > 4 ? 1 : 0));
+			sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
+			sgl->length = TW_CPU_TO_SGL(length);
+			oldcommand->size += pae;
+			oldcommand->size += sizeof(dma_addr_t) > 4 ? 1 : 0;
+		}
+	}
+} /* End twl_load_sgl() */
+
+/* This function handles ioctl for the character device
+   This interface is used by smartmontools open source software */
+static int twl_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	long timeout;
+	unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
+	dma_addr_t dma_handle;
+	int request_id = 0;
+	TW_Ioctl_Driver_Command driver_command;
+	TW_Ioctl_Buf_Apache *tw_ioctl;
+	TW_Command_Full *full_command_packet;
+	TW_Device_Extension *tw_dev = twl_device_extension_list[iminor(inode)];
+	int retval = -EFAULT;
+	void __user *argp = (void __user *)arg;
+
+	/* Only let one of these through at a time */
+	if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
+		retval = -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 = -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, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, &dma_handle, GFP_KERNEL);
+	if (!cpu_addr) {
+		retval = -ENOMEM;
+		goto out2;
+	}
+
+	tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
+
+	/* Now copy down the entire ioctl */
+	if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1))
+		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);
+		twl_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_Command_Full *)&tw_ioctl->firmware_command;
+
+		/* Load request id and sglist for both command types */
+		twl_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 */
+		twl_post_command_packet(tw_dev, request_id);
+		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-sas: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
+			       tw_dev->host->host_no, TW_DRIVER, 0x6,
+			       cmd);
+			retval = -EIO;
+			twl_reset_device_extension(tw_dev, 1);
+			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;
+		twl_free_request_id(tw_dev, request_id);
+		spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+		break;
+	default:
+		retval = -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 - 1) == 0)
+		retval = 0;
+out3:
+	/* Now free ioctl buf memory */
+	dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle);
+out2:
+	mutex_unlock(&tw_dev->ioctl_lock);
+out:
+	return retval;
+} /* End twl_chrdev_ioctl() */
+
+/* This function handles open for the character device */
+static int twl_chrdev_open(struct inode *inode, struct file *file)
+{
+	unsigned int minor_number;
+	int retval = -ENODEV;
+
+	if (!capable(CAP_SYS_ADMIN)) {
+		retval = -EACCES;
+		goto out;
+	}
+
+	cycle_kernel_lock();
+	minor_number = iminor(inode);
+	if (minor_number >= twl_device_extension_count)
+		goto out;
+	retval = 0;
+out:
+	return retval;
+} /* End twl_chrdev_open() */
+
+/* File operations struct for character device */
+static const struct file_operations twl_fops = {
+	.owner		= THIS_MODULE,
+	.ioctl		= twl_chrdev_ioctl,
+	.open		= twl_chrdev_open,
+	.release	= NULL
+};
+
+/* This function passes sense data from firmware to scsi layer */
+static int twl_fill_sense(TW_Device_Extension *tw_dev, int i, int request_id, int copy_sense, int print_host)
+{
+	TW_Command_Apache_Header *header;
+	TW_Command_Full *full_command_packet;
+	unsigned short error;
+	char *error_str;
+	int retval = 1;
+
+	header = tw_dev->sense_buffer_virt[i];
+	full_command_packet = tw_dev->command_packet_virt[request_id];
+
+	/* Get embedded firmware error string */
+	error_str = &(header->err_specific_desc[strlen(header->err_specific_desc) + 1]);
+
+	/* Don't print error for Logical unit not supported during rollcall */
+	error = le16_to_cpu(header->status_block.error);
+	if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE) && (error != TW_ERROR_INVALID_FIELD_IN_CDB)) {
+		if (print_host)
+			printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
+			       tw_dev->host->host_no,
+			       TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
+			       header->status_block.error,
+			       error_str, 
+			       header->err_specific_desc);
+		else
+			printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s:%s.\n",
+			       TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
+			       header->status_block.error,
+			       error_str,
+			       header->err_specific_desc);
+	}
+
+	if (copy_sense) {
+		memcpy(tw_dev->srb[request_id]->sense_buffer, header->sense_data, TW_SENSE_DATA_LENGTH);
+		tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
+		goto out;
+	}
+out:
+	return retval;
+} /* End twl_fill_sense() */
+
+/* This function will free up device extension resources */
+static void twl_free_device_extension(TW_Device_Extension *tw_dev)
+{
+	if (tw_dev->command_packet_virt[0])
+		pci_free_consistent(tw_dev->tw_pci_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])
+		pci_free_consistent(tw_dev->tw_pci_dev,
+				    TW_SECTOR_SIZE*TW_Q_LENGTH,
+				    tw_dev->generic_buffer_virt[0],
+				    tw_dev->generic_buffer_phys[0]);
+
+	if (tw_dev->sense_buffer_virt[0])
+		pci_free_consistent(tw_dev->tw_pci_dev,
+				    sizeof(TW_Command_Apache_Header)*
+				    TW_Q_LENGTH,
+				    tw_dev->sense_buffer_virt[0],
+				    tw_dev->sense_buffer_phys[0]);
+
+	kfree(tw_dev->event_queue[0]);
+} /* End twl_free_device_extension() */
+
+/* This function will get parameter table entries from the firmware */
+static void *twl_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 = TW_CPU_TO_SGL(TW_SECTOR_SIZE);
+
+	/* Post the command packet to the board */
+	twl_post_command_packet(tw_dev, request_id);
+
+	/* Poll for completion */
+	if (twl_poll_response(tw_dev, request_id, 30))
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "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 twl_get_param() */
+
+/* This function will send an initconnection command to controller */
+static int twl_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);
+	tw_initconnect->features = set_features;
+
+	/* Turn on 64-bit sgl support if we need to */
+	tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
+
+	tw_initconnect->features = cpu_to_le32(tw_initconnect->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 */
+	twl_post_command_packet(tw_dev, request_id);
+
+	/* Poll for completion */
+	if (twl_poll_response(tw_dev, request_id, 30)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x8, "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 twl_initconnection() */
+
+/* This function will initialize the fields of a device extension */
+static int twl_initialize_device_extension(TW_Device_Extension *tw_dev)
+{
+	int i, retval = 1;
+
+	/* Initialize command packet buffers */
+	if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x9, "Command packet memory allocation failed");
+		goto out;
+	}
+
+	/* Initialize generic buffer */
+	if (twl_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Generic memory allocation failed");
+		goto out;
+	}
+
+	/* Allocate sense buffers */
+	if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Apache_Header), 2)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xb, "Sense buffer 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, 0xc, "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->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 twl_initialize_device_extension() */
+
+/* This function will perform a pci-dma unmap */
+static void twl_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)
+{
+	struct scsi_cmnd *cmd = tw_dev->srb[request_id];
+
+	if (cmd->SCp.phase == TW_PHASE_SGLIST)
+		scsi_dma_unmap(cmd);
+} /* End twl_unmap_scsi_data() */
+
+/* This function will handle attention interrupts */
+static int twl_handle_attention_interrupt(TW_Device_Extension *tw_dev)
+{
+	int retval = 1;
+	u32 request_id, doorbell;
+
+	/* Read doorbell status */
+	doorbell = readl(TWL_HOBDB_REG_ADDR(tw_dev));
+
+	/* Check for controller errors */
+	if (doorbell & TWL_DOORBELL_CONTROLLER_ERROR) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "Microcontroller Error: clearing");
+		goto out;
+	}
+
+	/* Check if we need to perform an AEN drain */
+	if (doorbell & TWL_DOORBELL_ATTENTION_INTERRUPT) {
+		if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
+			twl_get_request_id(tw_dev, &request_id);
+			if (twl_aen_read_queue(tw_dev, request_id)) {
+				tw_dev->state[request_id] = TW_S_COMPLETED;
+				twl_free_request_id(tw_dev, request_id);
+				clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
+			}
+		}
+	}
+
+	retval = 0;
+out:
+	/* Clear doorbell interrupt */
+	TWL_CLEAR_DB_INTERRUPT(tw_dev);
+
+	/* Make sure the clear was flushed by reading it back */
+	readl(TWL_HOBDBC_REG_ADDR(tw_dev));
+
+	return retval;
+} /* End twl_handle_attention_interrupt() */
+
+/* Interrupt service routine */
+static irqreturn_t twl_interrupt(int irq, void *dev_instance)
+{
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
+	int i, handled = 0, error = 0;
+	dma_addr_t mfa = 0;
+	u32 reg, regl, regh, response, request_id = 0;
+	struct scsi_cmnd *cmd;
+	TW_Command_Full *full_command_packet;
+
+	spin_lock(tw_dev->host->host_lock);
+
+	/* Read host interrupt status */
+	reg = readl(TWL_HISTAT_REG_ADDR(tw_dev));
+
+	/* Check if this is our interrupt, otherwise bail */
+	if (!(reg & TWL_HISTATUS_VALID_INTERRUPT))
+		goto twl_interrupt_bail;
+
+	handled = 1;
+
+	/* If we are resetting, bail */
+	if (test_bit(TW_IN_RESET, &tw_dev->flags))
+		goto twl_interrupt_bail;
+
+	/* Attention interrupt */
+	if (reg & TWL_HISTATUS_ATTENTION_INTERRUPT) {
+		if (twl_handle_attention_interrupt(tw_dev)) {
+			TWL_MASK_INTERRUPTS(tw_dev);
+			goto twl_interrupt_bail;
+		}
+	}
+
+	/* Response interrupt */
+	while (reg & TWL_HISTATUS_RESPONSE_INTERRUPT) {
+		if (sizeof(dma_addr_t) > 4) {
+			regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
+			regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
+			mfa = ((u64)regh << 32) | regl;
+		} else
+			mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
+
+		error = 0;
+		response = (u32)mfa;
+
+		/* Check for command packet error */
+		if (!TW_NOTMFA_OUT(response)) {
+			for (i=0;i<TW_Q_LENGTH;i++) {
+				if (tw_dev->sense_buffer_phys[i] == mfa) {
+					request_id = le16_to_cpu(tw_dev->sense_buffer_virt[i]->header_desc.request_id);
+					if (tw_dev->srb[request_id] != NULL)
+						error = twl_fill_sense(tw_dev, i, request_id, 1, 1);
+					else {
+						/* Skip ioctl error prints */
+						if (request_id != tw_dev->chrdev_request_id)
+							error = twl_fill_sense(tw_dev, i, request_id, 0, 1);
+						else
+							memcpy(tw_dev->command_packet_virt[request_id], tw_dev->sense_buffer_virt[i], sizeof(TW_Command_Apache_Header));
+					}
+
+					/* Now re-post the sense buffer */
+					writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev));
+					writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev));
+					break;
+				}
+			}
+		} else
+			request_id = TW_RESID_OUT(response);
+
+		full_command_packet = tw_dev->command_packet_virt[request_id];
+
+		/* 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, 0xe, "Received a request id that wasn't posted");
+				TWL_MASK_INTERRUPTS(tw_dev);
+				goto twl_interrupt_bail;
+			}
+		}
+
+		/* Check for internal command completion */
+		if (tw_dev->srb[request_id] == NULL) {
+			if (request_id != tw_dev->chrdev_request_id) {
+				if (twl_aen_complete(tw_dev, request_id))
+					TW_PRINTK(tw_dev->host, TW_DRIVER, 0xf, "Error completing AEN during attention interrupt");
+			} else {
+				tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
+				wake_up(&tw_dev->ioctl_wqueue);
+			}
+		} else {
+			cmd = tw_dev->srb[request_id];
+
+			if (!error)
+				cmd->result = (DID_OK << 16);
+			
+			/* Report residual bytes for single sgl */
+			if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) {
+				if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id]))
+					scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length);
+			}
+
+			/* Now complete the io */
+			tw_dev->state[request_id] = TW_S_COMPLETED;
+			twl_free_request_id(tw_dev, request_id);
+			tw_dev->posted_request_count--;
+			tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
+			twl_unmap_scsi_data(tw_dev, request_id);
+		}
+
+		/* Check for another response interrupt */
+		reg = readl(TWL_HISTAT_REG_ADDR(tw_dev));
+	}
+
+twl_interrupt_bail:
+	spin_unlock(tw_dev->host->host_lock);
+	return IRQ_RETVAL(handled);
+} /* End twl_interrupt() */
+
+/* This function will poll for a register change */
+static int twl_poll_register(TW_Device_Extension *tw_dev, void *reg, u32 value, u32 result, int seconds)
+{
+	unsigned long before;
+	int retval = 1;
+	u32 reg_value;
+
+	reg_value = readl(reg);
+	before = jiffies;
+
+        while ((reg_value & value) != result) {
+		reg_value = readl(reg);
+		if (time_after(jiffies, before + HZ * seconds))
+			goto out;
+		msleep(50);
+	}
+	retval = 0;
+out:
+	return retval;
+} /* End twl_poll_register() */
+
+/* This function will reset a controller */
+static int twl_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
+{
+	int retval = 1;
+	int i = 0;
+	u32 status = 0;
+	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;
+	int tries = 0;
+	int do_soft_reset = soft_reset;
+
+	while (tries < TW_MAX_RESET_TRIES) {
+		/* Do a soft reset if one is needed */
+		if (do_soft_reset) {
+			TWL_SOFT_RESET(tw_dev);
+
+			/* Make sure controller is in a good state */
+			if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, 0x0, 30)) {
+				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Controller never went non-ready during reset sequence");
+				tries++;
+				continue;
+			}
+			if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, TWL_CONTROLLER_READY, 60)) {
+				TW_PRINTK(tw_dev->host, TW_DRIVER, 0x11, "Controller not ready during reset sequence");
+				tries++;
+				continue;
+			}
+		}
+
+		/* Initconnect */
+		if (twl_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
+				       TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
+				       TW_9750_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, 0x12, "Initconnection failed while checking SRL");
+			do_soft_reset = 1;
+			tries++;
+			continue;
+		}
+
+		/* Load sense buffers */
+		while (i < TW_Q_LENGTH) {
+			writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev));
+			writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev));
+
+			/* Check status for over-run after each write */
+			status = readl(TWL_STATUS_REG_ADDR(tw_dev));
+			if (!(status & TWL_STATUS_OVERRUN_SUBMIT))
+			    i++;
+		}
+
+		/* Now check status */
+		status = readl(TWL_STATUS_REG_ADDR(tw_dev));
+		if (status) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "Bad controller status after loading sense buffers");
+			do_soft_reset = 1;
+			tries++;
+			continue;
+		}
+
+		/* Drain the AEN queue */
+		if (twl_aen_drain_queue(tw_dev, soft_reset)) {
+			TW_PRINTK(tw_dev->host, TW_DRIVER, 0x14, "AEN drain failed during reset sequence");
+			do_soft_reset = 1;
+			tries++;
+			continue;
+		}
+
+		/* Load rest of compatibility struct */
+		strncpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION, strlen(TW_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;
+
+		/* If we got here, controller is in a good state */
+		retval = 0;
+		goto out;
+	}
+out:
+	return retval;
+} /* End twl_reset_sequence() */
+
+/* This function will reset a device extension */
+static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset)
+{
+	int i = 0, retval = 1;
+	unsigned long flags = 0;
+
+	/* Block SCSI requests while we are resetting */
+	if (ioctl_reset)
+		scsi_block_requests(tw_dev->host);
+
+	set_bit(TW_IN_RESET, &tw_dev->flags);
+	TWL_MASK_INTERRUPTS(tw_dev);
+	TWL_CLEAR_DB_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]) {
+				tw_dev->srb[i]->result = (DID_RESET << 16);
+				tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
+				twl_unmap_scsi_data(tw_dev, i);
+			}
+		}
+	}
+
+	/* 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;
+
+	spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
+
+	if (twl_reset_sequence(tw_dev, 1))
+		goto out;
+
+	TWL_UNMASK_INTERRUPTS(tw_dev);
+
+	clear_bit(TW_IN_RESET, &tw_dev->flags);
+	tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
+
+	retval = 0;
+out:
+	if (ioctl_reset)
+		scsi_unblock_requests(tw_dev->host);
+	return retval;
+} /* End twl_reset_device_extension() */
+
+/* This funciton returns unit geometry in cylinders/heads/sectors */
+static int twl_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[])
+{
+	int heads, sectors, cylinders;
+	TW_Device_Extension *tw_dev;
+
+	tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
+
+	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 twl_scsi_biosparam() */
+
+/* This is the new scsi eh reset function */
+static int twl_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 (twl_reset_device_extension(tw_dev, 0)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "Controller reset failed during scsi host reset");
+		goto out;
+	}
+
+	retval = SUCCESS;
+out:
+	mutex_unlock(&tw_dev->ioctl_lock);
+	return retval;
+} /* End twl_scsi_eh_reset() */
+
+/* This is the main scsi queue function to handle scsi opcodes */
+static int twl_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
+{
+	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;
+	}
+
+	/* Save done function into scsi_cmnd struct */
+	SCpnt->scsi_done = done;
+		
+	/* Get a free request id */
+	twl_get_request_id(tw_dev, &request_id);
+
+	/* Save the scsi command for use by the ISR */
+	tw_dev->srb[request_id] = SCpnt;
+
+	/* Initialize phase to zero */
+	SCpnt->SCp.phase = TW_PHASE_INITIAL;
+
+	retval = twl_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
+	if (retval) {
+		tw_dev->state[request_id] = TW_S_COMPLETED;
+		twl_free_request_id(tw_dev, request_id);
+		SCpnt->result = (DID_ERROR << 16);
+		done(SCpnt);
+		retval = 0;
+	}
+out:
+	return retval;
+} /* End twl_scsi_queue() */
+
+/* This function tells the controller to shut down */
+static void __twl_shutdown(TW_Device_Extension *tw_dev)
+{
+	/* Disable interrupts */
+	TWL_MASK_INTERRUPTS(tw_dev);
+
+	/* Free up the IRQ */
+	free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
+
+	printk(KERN_WARNING "3w-sas: Shutting down host %d.\n", tw_dev->host->host_no);
+
+	/* Tell the card we are shutting down */
+	if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Connection shutdown failed");
+	} else {
+		printk(KERN_WARNING "3w-sas: Shutdown complete.\n");
+	}
+
+	/* Clear doorbell interrupt just before exit */
+	TWL_CLEAR_DB_INTERRUPT(tw_dev);
+} /* End __twl_shutdown() */
+
+/* Wrapper for __twl_shutdown */
+static void twl_shutdown(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev;
+
+	if (!host)
+		return;
+
+	tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	if (tw_dev->online) 
+		__twl_shutdown(tw_dev);
+} /* End twl_shutdown() */
+
+/* This function configures unit settings when a unit is coming on-line */
+static int twl_slave_configure(struct scsi_device *sdev)
+{
+	/* Force 60 second timeout */
+	blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
+
+	return 0;
+} /* End twl_slave_configure() */
+
+/* scsi_host_template initializer */
+static struct scsi_host_template driver_template = {
+	.module			= THIS_MODULE,
+	.name			= "3w-sas",
+	.queuecommand		= twl_scsi_queue,
+	.eh_host_reset_handler	= twl_scsi_eh_reset,
+	.bios_param		= twl_scsi_biosparam,
+	.change_queue_depth	= twl_change_queue_depth,
+	.can_queue		= TW_Q_LENGTH-2,
+	.slave_configure	= twl_slave_configure,
+	.this_id		= -1,
+	.sg_tablesize		= TW_LIBERATOR_MAX_SGL_LENGTH,
+	.max_sectors		= TW_MAX_SECTORS,
+	.cmd_per_lun		= TW_MAX_CMDS_PER_LUN,
+	.use_clustering		= ENABLE_CLUSTERING,
+	.shost_attrs		= twl_host_attrs,
+	.emulated		= 1
+};
+
+/* This function will probe and initialize a card */
+static int __devinit twl_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
+{
+	struct Scsi_Host *host = NULL;
+	TW_Device_Extension *tw_dev;
+	resource_size_t mem_addr, mem_len;
+	int retval = -ENODEV;
+	int *ptr_phycount, phycount=0;
+
+	retval = pci_enable_device(pdev);
+	if (retval) {
+		TW_PRINTK(host, TW_DRIVER, 0x17, "Failed to enable pci device");
+		goto out_disable_device;
+	}
+
+	pci_set_master(pdev);
+	pci_try_set_mwi(pdev);
+
+	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
+	    || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
+		if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
+		    || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
+			TW_PRINTK(host, TW_DRIVER, 0x18, "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, 0x19, "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 (twl_initialize_device_extension(tw_dev)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Failed to initialize device extension");
+		goto out_free_device_extension;
+	}
+
+	/* Request IO regions */
+	retval = pci_request_regions(pdev, "3w-sas");
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Failed to get mem region");
+		goto out_free_device_extension;
+	}
+
+	/* Use region 1 */
+	mem_addr = pci_resource_start(pdev, 1);
+	mem_len = pci_resource_len(pdev, 1);
+
+	/* Save base address */
+	tw_dev->base_addr = ioremap(mem_addr, mem_len);
+
+	if (!tw_dev->base_addr) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to ioremap");
+		goto out_release_mem_region;
+	}
+
+	/* Disable interrupts on the card */
+	TWL_MASK_INTERRUPTS(tw_dev);
+
+	/* Initialize the card */
+	if (twl_reset_sequence(tw_dev, 0)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Controller reset failed during probe");
+		goto out_iounmap;
+	}
+
+	/* Set host specific parameters */
+	host->max_id = TW_MAX_UNITS;
+	host->max_cmd_len = TW_MAX_CDB_LEN;
+	host->max_lun = TW_MAX_LUNS;
+	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, 0x1e, "scsi add host failed");
+		goto out_iounmap;
+	}
+
+	pci_set_drvdata(pdev, host);
+
+	printk(KERN_WARNING "3w-sas: scsi%d: Found an LSI 3ware %s Controller at 0x%llx, IRQ: %d.\n",
+	       host->host_no,
+	       (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
+				     TW_PARAM_MODEL, TW_PARAM_MODEL_LENGTH),
+	       (u64)mem_addr, pdev->irq);
+
+	ptr_phycount = twl_get_param(tw_dev, 2, TW_PARAM_PHY_SUMMARY_TABLE,
+				     TW_PARAM_PHYCOUNT, TW_PARAM_PHYCOUNT_LENGTH);
+	if (ptr_phycount)
+		phycount = le32_to_cpu(*(int *)ptr_phycount);
+
+	printk(KERN_WARNING "3w-sas: scsi%d: Firmware %s, BIOS %s, Phys: %d.\n",
+	       host->host_no,
+	       (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
+				     TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
+	       (char *)twl_get_param(tw_dev, 2, TW_VERSION_TABLE,
+				     TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
+	       phycount);
+
+	/* Try to enable MSI */
+	if (use_msi && !pci_enable_msi(pdev))
+		set_bit(TW_USING_MSI, &tw_dev->flags);
+
+	/* Now setup the interrupt handler */
+	retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev);
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ");
+		goto out_remove_host;
+	}
+
+	twl_device_extension_list[twl_device_extension_count] = tw_dev;
+	twl_device_extension_count++;
+
+	/* Re-enable interrupts on the card */
+	TWL_UNMASK_INTERRUPTS(tw_dev);
+	
+	/* Finally, scan the host */
+	scsi_scan_host(host);
+
+	/* Add sysfs binary files */
+	if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr))
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Failed to create sysfs binary file: 3ware_aen_read");
+	if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr))
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Failed to create sysfs binary file: 3ware_compat_info");
+
+	if (twl_major == -1) {
+		if ((twl_major = register_chrdev (0, "twl", &twl_fops)) < 0)
+			TW_PRINTK(host, TW_DRIVER, 0x22, "Failed to register character device");
+	}
+	tw_dev->online = 1;
+	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:
+	twl_free_device_extension(tw_dev);
+	scsi_host_put(host);
+out_disable_device:
+	pci_disable_device(pdev);
+
+	return retval;
+} /* End twl_probe() */
+
+/* This function is called to remove a device */
+static void twl_remove(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev;
+
+	if (!host)
+		return;
+
+	tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	if (!tw_dev->online)
+		return;
+
+	/* Remove sysfs binary files */
+	sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr);
+	sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr);
+
+	scsi_remove_host(tw_dev->host);
+
+	/* Unregister character device */
+	if (twl_major >= 0) {
+		unregister_chrdev(twl_major, "twl");
+		twl_major = -1;
+	}
+
+	/* Shutdown the card */
+	__twl_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 */
+	twl_free_device_extension(tw_dev);
+
+	scsi_host_put(tw_dev->host);
+	pci_disable_device(pdev);
+	twl_device_extension_count--;
+} /* End twl_remove() */
+
+#ifdef CONFIG_PM
+/* This function is called on PCI suspend */
+static int twl_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	printk(KERN_WARNING "3w-sas: Suspending host %d.\n", tw_dev->host->host_no);
+	/* Disable interrupts */
+	TWL_MASK_INTERRUPTS(tw_dev);
+
+	free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
+
+	/* Tell the card we are shutting down */
+	if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x23, "Connection shutdown failed during suspend");
+	} else {
+		printk(KERN_WARNING "3w-sas: Suspend complete.\n");
+	}
+
+	/* Clear doorbell interrupt */
+	TWL_CLEAR_DB_INTERRUPT(tw_dev);
+
+	pci_save_state(pdev);
+	pci_disable_device(pdev);
+	pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+	return 0;
+} /* End twl_suspend() */
+
+/* This function is called on PCI resume */
+static int twl_resume(struct pci_dev *pdev)
+{
+	int retval = 0;
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
+
+	printk(KERN_WARNING "3w-sas: Resuming host %d.\n", tw_dev->host->host_no);
+	pci_set_power_state(pdev, PCI_D0);
+	pci_enable_wake(pdev, PCI_D0, 0);
+	pci_restore_state(pdev);
+
+	retval = pci_enable_device(pdev);
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x24, "Enable device failed during resume");
+		return retval;
+	}
+
+	pci_set_master(pdev);
+	pci_try_set_mwi(pdev);
+
+	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
+	    || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
+		if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
+		    || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
+			TW_PRINTK(host, TW_DRIVER, 0x25, "Failed to set dma mask during resume");
+			retval = -ENODEV;
+			goto out_disable_device;
+		}
+
+	/* Initialize the card */
+	if (twl_reset_sequence(tw_dev, 0)) {
+		retval = -ENODEV;
+		goto out_disable_device;
+	}
+
+	/* Now setup the interrupt handler */
+	retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev);
+	if (retval) {
+		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "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 */
+	TWL_UNMASK_INTERRUPTS(tw_dev);
+
+	printk(KERN_WARNING "3w-sas: Resume complete.\n");
+	return 0;
+
+out_disable_device:
+	scsi_remove_host(host);
+	pci_disable_device(pdev);
+
+	return retval;
+} /* End twl_resume() */
+#endif
+
+/* PCI Devices supported by this driver */
+static struct pci_device_id twl_pci_tbl[] __devinitdata = {
+	{ PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9750,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ }
+};
+MODULE_DEVICE_TABLE(pci, twl_pci_tbl);
+
+/* pci_driver initializer */
+static struct pci_driver twl_driver = {
+	.name		= "3w-sas",
+	.id_table	= twl_pci_tbl,
+	.probe		= twl_probe,
+	.remove		= twl_remove,
+#ifdef CONFIG_PM
+	.suspend	= twl_suspend,
+	.resume		= twl_resume,
+#endif
+	.shutdown	= twl_shutdown
+};
+
+/* This function is called on driver initialization */
+static int __init twl_init(void)
+{
+	printk(KERN_WARNING "LSI 3ware SAS/SATA-RAID Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
+
+	return pci_register_driver(&twl_driver);
+} /* End twl_init() */
+
+/* This function is called on driver exit */
+static void __exit twl_exit(void)
+{
+	pci_unregister_driver(&twl_driver);
+} /* End twl_exit() */
+
+module_init(twl_init);
+module_exit(twl_exit);
+
diff -Naur linux-2.6.32-rc5-git1/drivers/scsi/3w-sas.h linux-2.6.32-rc5-git1.new/drivers/scsi/3w-sas.h
--- linux-2.6.32-rc5-git1/drivers/scsi/3w-sas.h	1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.32-rc5-git1.new/drivers/scsi/3w-sas.h	2009-10-19 17:07:44.000000000 -0700
@@ -0,0 +1,396 @@
+/*
+   3w-sas.h -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux.
+
+   Written By: Adam Radford <linuxraid@lsi.com>
+
+   Copyright (C) 2009 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:
+   linuxraid@lsi.com
+
+   For more information, goto:
+   http://www.lsi.com
+*/
+
+#ifndef _3W_SAS_H
+#define _3W_SAS_H
+
+/* AEN severity table */
+static char *twl_aen_severity_table[] =
+{
+	"None", "ERROR", "WARNING", "INFO", "DEBUG", (char*) 0
+};
+
+/* Liberator register offsets */
+#define TWL_STATUS                         0x0  /* Status */
+#define TWL_HIBDB                          0x20 /* Inbound doorbell */
+#define TWL_HISTAT                         0x30 /* Host interrupt status */
+#define TWL_HIMASK                         0x34 /* Host interrupt mask */
+#define TWL_HOBDB			   0x9C /* Outbound doorbell */
+#define TWL_HOBDBC                         0xA0 /* Outbound doorbell clear */
+#define TWL_SCRPD3                         0xBC /* Scratchpad */
+#define TWL_HIBQPL                         0xC0 /* Host inbound Q low */
+#define TWL_HIBQPH                         0xC4 /* Host inbound Q high */
+#define TWL_HOBQPL                         0xC8 /* Host outbound Q low */
+#define TWL_HOBQPH                         0xCC /* Host outbound Q high */
+#define TWL_HISTATUS_VALID_INTERRUPT	   0xC
+#define TWL_HISTATUS_ATTENTION_INTERRUPT   0x4
+#define TWL_HISTATUS_RESPONSE_INTERRUPT	   0x8
+#define TWL_STATUS_OVERRUN_SUBMIT	   0x2000
+#define TWL_ISSUE_SOFT_RESET		   0x100
+#define TWL_CONTROLLER_READY		   0x2000
+#define TWL_DOORBELL_CONTROLLER_ERROR	   0x200000
+#define TWL_DOORBELL_ATTENTION_INTERRUPT   0x40000
+#define TWL_PULL_MODE			   0x1
+
+/* Command packet opcodes used by the driver */
+#define TW_OP_INIT_CONNECTION 0x1
+#define TW_OP_GET_PARAM	      0x12
+#define TW_OP_SET_PARAM	      0x13
+#define TW_OP_EXECUTE_SCSI    0x10
+
+/* Asynchronous Event Notification (AEN) codes used by the driver */
+#define TW_AEN_QUEUE_EMPTY       0x0000
+#define TW_AEN_SOFT_RESET        0x0001
+#define TW_AEN_SYNC_TIME_WITH_HOST 0x031
+#define TW_AEN_SEVERITY_ERROR    0x1
+#define TW_AEN_SEVERITY_DEBUG    0x4
+#define TW_AEN_NOT_RETRIEVED 0x1
+
+/* Command state defines */
+#define TW_S_INITIAL   0x1  /* Initial state */
+#define TW_S_STARTED   0x2  /* Id in use */
+#define TW_S_POSTED    0x4  /* Posted to the controller */
+#define TW_S_COMPLETED 0x8  /* Completed by isr */
+#define TW_S_FINISHED  0x10 /* I/O completely done */
+
+/* Compatibility defines */
+#define TW_9750_ARCH_ID 10
+#define TW_CURRENT_DRIVER_SRL 40
+#define TW_CURRENT_DRIVER_BUILD 0
+#define TW_CURRENT_DRIVER_BRANCH 0
+
+/* Phase defines */
+#define TW_PHASE_INITIAL 0
+#define TW_PHASE_SGLIST  2
+
+/* Misc defines */
+#define TW_SECTOR_SIZE                        512
+#define TW_MAX_UNITS			      32
+#define TW_INIT_MESSAGE_CREDITS		      0x100
+#define TW_INIT_COMMAND_PACKET_SIZE	      0x3
+#define TW_INIT_COMMAND_PACKET_SIZE_EXTENDED  0x6
+#define TW_EXTENDED_INIT_CONNECT	      0x2
+#define TW_BASE_FW_SRL			      24
+#define TW_BASE_FW_BRANCH		      0
+#define TW_BASE_FW_BUILD		      1
+#define TW_Q_LENGTH			      256
+#define TW_Q_START			      0
+#define TW_MAX_SLOT			      32
+#define TW_MAX_RESET_TRIES		      2
+#define TW_MAX_CMDS_PER_LUN		      254
+#define TW_MAX_AEN_DRAIN		      255
+#define TW_IN_RESET                           2
+#define TW_USING_MSI			      3
+#define TW_IN_ATTENTION_LOOP		      4
+#define TW_MAX_SECTORS                        256
+#define TW_MAX_CDB_LEN                        16
+#define TW_IOCTL_CHRDEV_TIMEOUT               60 /* 60 seconds */
+#define TW_IOCTL_CHRDEV_FREE                  -1
+#define TW_COMMAND_OFFSET                     128 /* 128 bytes */
+#define TW_VERSION_TABLE                      0x0402
+#define TW_TIMEKEEP_TABLE		      0x040A
+#define TW_INFORMATION_TABLE		      0x0403
+#define TW_PARAM_FWVER			      3
+#define TW_PARAM_FWVER_LENGTH		      16
+#define TW_PARAM_BIOSVER		      4
+#define TW_PARAM_BIOSVER_LENGTH		      16
+#define TW_PARAM_MODEL			      8
+#define TW_PARAM_MODEL_LENGTH		      16
+#define TW_PARAM_PHY_SUMMARY_TABLE	      1
+#define TW_PARAM_PHYCOUNT		      2
+#define TW_PARAM_PHYCOUNT_LENGTH	      1
+#define TW_IOCTL_FIRMWARE_PASS_THROUGH        0x108  // Used by smartmontools
+#define TW_ALLOCATION_LENGTH		      128
+#define TW_SENSE_DATA_LENGTH		      18
+#define TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED   0x10a
+#define TW_ERROR_INVALID_FIELD_IN_CDB	      0x10d
+#define TW_ERROR_UNIT_OFFLINE                 0x128
+#define TW_MESSAGE_SOURCE_CONTROLLER_ERROR    3
+#define TW_MESSAGE_SOURCE_CONTROLLER_EVENT    4
+#define TW_DRIVER 			      6
+#ifndef PCI_DEVICE_ID_3WARE_9750
+#define PCI_DEVICE_ID_3WARE_9750 0x1010
+#endif
+
+/* Bitmask macros to eliminate bitfields */
+
+/* opcode: 5, reserved: 3 */
+#define TW_OPRES_IN(x,y) ((x << 5) | (y & 0x1f))
+#define TW_OP_OUT(x) (x & 0x1f)
+
+/* opcode: 5, sgloffset: 3 */
+#define TW_OPSGL_IN(x,y) ((x << 5) | (y & 0x1f))
+#define TW_SGL_OUT(x) ((x >> 5) & 0x7)
+
+/* severity: 3, reserved: 5 */
+#define TW_SEV_OUT(x) (x & 0x7)
+
+/* not_mfa: 1, reserved: 7, status: 8, request_id: 16 */
+#define TW_RESID_OUT(x) ((x >> 16) & 0xffff)
+#define TW_NOTMFA_OUT(x) (x & 0x1)
+
+/* request_id: 12, lun: 4 */
+#define TW_REQ_LUN_IN(lun, request_id) (((lun << 12) & 0xf000) | (request_id & 0xfff))
+#define TW_LUN_OUT(lun) ((lun >> 12) & 0xf)
+
+/* Register access macros */
+#define TWL_STATUS_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_STATUS)
+#define TWL_HOBQPL_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_HOBQPL)
+#define TWL_HOBQPH_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_HOBQPH)
+#define TWL_HOBDB_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_HOBDB)
+#define TWL_HOBDBC_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_HOBDBC)
+#define TWL_HIMASK_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_HIMASK)
+#define TWL_HISTAT_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_HISTAT)
+#define TWL_HIBQPH_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_HIBQPH)
+#define TWL_HIBQPL_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_HIBQPL)
+#define TWL_HIBDB_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_HIBDB)
+#define TWL_SCRPD3_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr + TWL_SCRPD3)
+#define TWL_MASK_INTERRUPTS(x) (writel(~0, TWL_HIMASK_REG_ADDR(tw_dev)))
+#define TWL_UNMASK_INTERRUPTS(x) (writel(~TWL_HISTATUS_VALID_INTERRUPT, TWL_HIMASK_REG_ADDR(tw_dev)))
+#define TWL_CLEAR_DB_INTERRUPT(x) (writel(~0, TWL_HOBDBC_REG_ADDR(tw_dev)))
+#define TWL_SOFT_RESET(x) (writel(TWL_ISSUE_SOFT_RESET, TWL_HIBDB_REG_ADDR(tw_dev)))
+
+/* Macros */
+#define TW_PRINTK(h,a,b,c) { \
+if (h) \
+printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X): %s.\n",h->host_no,a,b,c); \
+else \
+printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s.\n",a,b,c); \
+}
+#define TW_MAX_LUNS 16
+#define TW_COMMAND_SIZE (sizeof(dma_addr_t) > 4 ? 6 : 4)
+#define TW_LIBERATOR_MAX_SGL_LENGTH (sizeof(dma_addr_t) > 4 ? 46 : 92)
+#define TW_LIBERATOR_MAX_SGL_LENGTH_OLD (sizeof(dma_addr_t) > 4 ? 47 : 94)
+#define TW_PADDING_LENGTH_LIBERATOR 136
+#define TW_PADDING_LENGTH_LIBERATOR_OLD 132
+#define TW_CPU_TO_SGL(x) (sizeof(dma_addr_t) > 4 ? cpu_to_le64(x) : cpu_to_le32(x))
+
+#pragma pack(1)
+
+/* SGL entry */
+typedef struct TAG_TW_SG_Entry_ISO {
+	dma_addr_t address;
+	dma_addr_t length;
+} TW_SG_Entry_ISO;
+
+/* Old Command Packet with ISO SGL */
+typedef struct TW_Command {
+	unsigned char opcode__sgloffset;
+	unsigned char size;
+	unsigned char request_id;
+	unsigned char unit__hostid;
+	/* Second DWORD */
+	unsigned char status;
+	unsigned char flags;
+	union {
+		unsigned short block_count;
+		unsigned short parameter_count;
+	} byte6_offset;
+	union {
+		struct {
+			u32 lba;
+			TW_SG_Entry_ISO sgl[TW_LIBERATOR_MAX_SGL_LENGTH_OLD];
+			unsigned char padding[TW_PADDING_LENGTH_LIBERATOR_OLD];
+		} io;
+		struct {
+			TW_SG_Entry_ISO sgl[TW_LIBERATOR_MAX_SGL_LENGTH_OLD];
+			u32 padding;
+			unsigned char padding2[TW_PADDING_LENGTH_LIBERATOR_OLD];
+		} param;
+	} byte8_offset;
+} TW_Command;
+
+/* New Command Packet with ISO SGL */
+typedef struct TAG_TW_Command_Apache {
+	unsigned char opcode__reserved;
+	unsigned char unit;
+	unsigned short request_id__lunl;
+	unsigned char status;
+	unsigned char sgl_offset;
+	unsigned short sgl_entries__lunh;
+	unsigned char cdb[16];
+	TW_SG_Entry_ISO sg_list[TW_LIBERATOR_MAX_SGL_LENGTH];
+	unsigned char padding[TW_PADDING_LENGTH_LIBERATOR];
+} TW_Command_Apache;
+
+/* New command packet header */
+typedef struct TAG_TW_Command_Apache_Header {
+	unsigned char sense_data[TW_SENSE_DATA_LENGTH];
+	struct {
+		char reserved[4];
+		unsigned short error;
+		unsigned char padding;
+		unsigned char severity__reserved;
+	} status_block;
+	unsigned char err_specific_desc[98];
+	struct {
+		unsigned char size_header;
+		unsigned short request_id;
+		unsigned char size_sense;
+	} header_desc;
+} TW_Command_Apache_Header;
+
+/* This struct is a union of the 2 command packets */
+typedef struct TAG_TW_Command_Full {
+	TW_Command_Apache_Header header;
+	union {
+		TW_Command oldcommand;
+		TW_Command_Apache newcommand;
+	} command;
+} TW_Command_Full;
+
+/* Initconnection structure */
+typedef struct TAG_TW_Initconnect {
+	unsigned char opcode__reserved;
+	unsigned char size;
+	unsigned char request_id;
+	unsigned char res2;
+	unsigned char status;
+	unsigned char flags;
+	unsigned short message_credits;
+	u32 features;
+	unsigned short fw_srl;
+	unsigned short fw_arch_id;
+	unsigned short fw_branch;
+	unsigned short fw_build;
+	u32 result;
+} TW_Initconnect;
+
+/* Event info structure */
+typedef struct TAG_TW_Event
+{
+	unsigned int sequence_id;
+	unsigned int time_stamp_sec;
+	unsigned short aen_code;
+	unsigned char severity;
+	unsigned char retrieved;
+	unsigned char repeat_count;
+	unsigned char parameter_len;
+	unsigned char parameter_data[98];
+} TW_Event;
+
+typedef struct TAG_TW_Ioctl_Driver_Command {
+	unsigned int control_code;
+	unsigned int status;
+	unsigned int unique_id;
+	unsigned int sequence_id;
+	unsigned int os_specific;
+	unsigned int buffer_length;
+} TW_Ioctl_Driver_Command;
+
+typedef struct TAG_TW_Ioctl_Apache {
+	TW_Ioctl_Driver_Command driver_command;
+        char padding[488];
+	TW_Command_Full firmware_command;
+	char data_buffer[1];
+} TW_Ioctl_Buf_Apache;
+
+/* GetParam descriptor */
+typedef struct {
+	unsigned short	table_id;
+	unsigned short	parameter_id;
+	unsigned short	parameter_size_bytes;
+	unsigned short  actual_parameter_size_bytes;
+	unsigned char	data[1];
+} TW_Param_Apache;
+
+/* Compatibility information structure */
+typedef struct TAG_TW_Compatibility_Info
+{
+	char driver_version[32];
+	unsigned short working_srl;
+	unsigned short working_branch;
+	unsigned short working_build;
+	unsigned short driver_srl_high;
+	unsigned short driver_branch_high;
+	unsigned short driver_build_high;
+	unsigned short driver_srl_low;
+	unsigned short driver_branch_low;
+	unsigned short driver_build_low;
+	unsigned short fw_on_ctlr_srl;
+	unsigned short fw_on_ctlr_branch;
+	unsigned short fw_on_ctlr_build;
+} TW_Compatibility_Info;
+
+#pragma pack()
+
+typedef struct TAG_TW_Device_Extension {
+	void                     __iomem *base_addr;
+	unsigned long	       	*generic_buffer_virt[TW_Q_LENGTH];
+	dma_addr_t	       	generic_buffer_phys[TW_Q_LENGTH];
+	TW_Command_Full	       	*command_packet_virt[TW_Q_LENGTH];
+	dma_addr_t		command_packet_phys[TW_Q_LENGTH];
+	TW_Command_Apache_Header *sense_buffer_virt[TW_Q_LENGTH];
+	dma_addr_t		sense_buffer_phys[TW_Q_LENGTH];
+	struct pci_dev		*tw_pci_dev;
+	struct scsi_cmnd	*srb[TW_Q_LENGTH];
+	unsigned char		free_queue[TW_Q_LENGTH];
+	unsigned char		free_head;
+	unsigned char		free_tail;
+	int     		state[TW_Q_LENGTH];
+	unsigned int		posted_request_count;
+	unsigned int		max_posted_request_count;
+	unsigned int		max_sgl_entries;
+	unsigned int		sgl_entries;
+	unsigned int		num_resets;
+	unsigned int		sector_count;
+	unsigned int		max_sector_count;
+	unsigned int		aen_count;
+	struct Scsi_Host	*host;
+	long			flags;
+	TW_Event                *event_queue[TW_Q_LENGTH];
+	unsigned char           error_index;
+	unsigned int            error_sequence_id;
+	int			chrdev_request_id;
+	wait_queue_head_t	ioctl_wqueue;
+	struct mutex		ioctl_lock;
+	TW_Compatibility_Info	tw_compat_info;
+	char			online;
+} TW_Device_Extension;
+
+#endif /* _3W_SAS_H */
+
diff -Naur linux-2.6.32-rc5-git1/drivers/scsi/Kconfig linux-2.6.32-rc5-git1.new/drivers/scsi/Kconfig
--- linux-2.6.32-rc5-git1/drivers/scsi/Kconfig	2009-10-15 17:41:50.000000000 -0700
+++ linux-2.6.32-rc5-git1.new/drivers/scsi/Kconfig	2009-10-19 17:13:59.000000000 -0700
@@ -399,6 +399,17 @@
 	  Please read the comments at the top of
 	  <file:drivers/scsi/3w-9xxx.c>.
 
+config SCSI_3W_SAS
+	tristate "3ware 97xx SAS/SATA-RAID support"
+	depends on PCI && SCSI
+	help
+	  This driver supports the LSI 3ware 9750 6Gb/s SAS/SATA-RAID cards.
+
+	  <http://www.lsi.com>
+
+	  Please read the comments at the top of
+	  <file:drivers/scsi/3w-sas.c>.
+
 config SCSI_7000FASST
 	tristate "7000FASST SCSI support"
 	depends on ISA && SCSI && ISA_DMA_API
diff -Naur linux-2.6.32-rc5-git1/drivers/scsi/Makefile linux-2.6.32-rc5-git1.new/drivers/scsi/Makefile
--- linux-2.6.32-rc5-git1/drivers/scsi/Makefile	2009-10-15 17:41:50.000000000 -0700
+++ linux-2.6.32-rc5-git1.new/drivers/scsi/Makefile	2009-10-19 17:08:30.000000000 -0700
@@ -113,6 +113,7 @@
 obj-$(CONFIG_SCSI_MAC53C94)	+= mac53c94.o
 obj-$(CONFIG_BLK_DEV_3W_XXXX_RAID) += 3w-xxxx.o
 obj-$(CONFIG_SCSI_3W_9XXX)	+= 3w-9xxx.o
+obj-$(CONFIG_SCSI_3W_SAS)	+= 3w-sas.o
 obj-$(CONFIG_SCSI_PPA)		+= ppa.o
 obj-$(CONFIG_SCSI_IMM)		+= imm.o
 obj-$(CONFIG_JAZZ_ESP)		+= esp_scsi.o	jazz_esp.o

Re: [PATCH] Add new driver for LSI 3ware 9750

[Rolf Eike Beer]

[-- Attachment #1: Type: Text/Plain, Size: 11292 bytes --]

adam radford wrote:

> +static int use_msi = 0;

Static variables are automatically 0.

> +/* This function will look up an AEN severity string */
> +static char *twl_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 = twl_aen_severity_table[severity_code];
> +out:
> +	return retval;
> +} /* End twl_aen_severity_lookup() */

I would find it more readable with direct "return NULL" and without the goto.

> +/* This function will read the aen queue from the isr */
> +static int twl_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
> +{
> +	char cdb[TW_MAX_CDB_LEN];
> +	TW_SG_Entry_ISO 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));

sizeof(*full_command_packet)

> +	/* Initialize cdb */
> +	memset(&cdb, 0, TW_MAX_CDB_LEN);

memset(...,sizeof(cdb))

> +	cdb[0] = REQUEST_SENSE; /* opcode */
> +	cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
> +
> +	/* Initialize sglist */
> +	memset(&sglist, 0, sizeof(TW_SG_Entry_ISO));

sizeof(sglist)

In all cases you will always get the correct size even if you change the 
variable to another type or the array to another length. This happens also in 
a bunch of other places.

> +/* This function will assign an available request id */
> +static void twl_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 twl_get_request_id() */

Why not simply return the request id instead of being a void function and 
taking that as pointer?

> +/* This function will poll for a response */
> +static int twl_poll_response(TW_Device_Extension *tw_dev, int
> request_id, int seconds)
> +{
> +	unsigned long before;
> +	dma_addr_t mfa;
> +	u32 regh, regl;
> +	u32 response;
> +	int retval = 1;
> +	int found = 0;
> +
> +	before = jiffies;
> +
> +	while (!found) {
> +		if (sizeof(dma_addr_t) > 4) {
> +			regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
> +			regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
> +			mfa = ((u64)regh << 32) | regl;
> +		} else
> +			mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
> +
> +		response = (u32)mfa;

Reading regh is useless here. And if you need to read it for protocol reasons 
at the end it's at least useless to put it into mfa, simply reading 
TWL_HOBQPL_REG_ADDR(tw_dev) into response should be enough.

> +static int twl_initialize_device_extension(TW_Device_Extension *tw_dev)

Device extension? Don't call anything IRP ;) Bah, I was so lucky that I had 
forgotten that pain for a while ;)

> +{
> +	int i, retval = 1;
> +
> +	/* Initialize command packet buffers */
> +	if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
> +		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x9, "Command packet memory
> allocation failed");
> +		goto out;
> +	}

Your gotos here don't do anything useful as there is no error handling at the 
destination so you could simply do "return something" here as that would allow 
anyone to spot what's going on without scrolling. Also you should return some 
useful return code (like ENOMEM here) instead of just "1" as that could ease 
debugging.

> +/* This funciton returns unit geometry in cylinders/heads/sectors */
> +static int twl_scsi_biosparam(struct scsi_device *sdev, struct
> block_device *bdev, sector_t capacity, int geom[])
> +{
> +	int heads, sectors, cylinders;
> +	TW_Device_Extension *tw_dev;
> +
> +	tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
> +
> +	if (capacity >= 0x200000) {
> +		heads = 255;
> +		sectors = 63;
> +		cylinders = sector_div(capacity, heads * sectors);
> +	} else {
> +		heads = 64;
> +		sectors = 32;
> +		cylinders = sector_div(capacity, heads * sectors);
> +	}

The calculation of cylinders is both the same, you could move it out of the if 
or just directly assign the result to geom[2].

> +/* This function will probe and initialize a card */
> +static int __devinit twl_probe(struct pci_dev *pdev, const struct
> pci_device_id *dev_id)
> +{
> +	struct Scsi_Host *host = NULL;
> +	TW_Device_Extension *tw_dev;
> +	resource_size_t mem_addr, mem_len;
> +	int retval = -ENODEV;
> +	int *ptr_phycount, phycount=0;
> +
> +	retval = pci_enable_device(pdev);
> +	if (retval) {
> +		TW_PRINTK(host, TW_DRIVER, 0x17, "Failed to enable pci device");
> +		goto out_disable_device;
> +	}

You may want to look at devres (see Documentation/driver-model/devres.txt) as 
that could make you the live a bit easier. It would care both for error 
handling here as well for device release.

> +	pci_set_master(pdev);
> +	pci_try_set_mwi(pdev);
> +
> +	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
> +	    || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
> +		if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
> +		    || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
> +			TW_PRINTK(host, TW_DRIVER, 0x18, "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, 0x19, "Failed to allocate memory for
> device extension");
> +		retval = -ENOMEM;
> +		goto out_disable_device;
> +	}
> +	tw_dev = (TW_Device_Extension *)host->hostdata;

tw_dev = shost_priv(host);

> +	/* Save values to device extension */
> +	tw_dev->host = host;
> +	tw_dev->tw_pci_dev = pdev;
> +
> +	if (twl_initialize_device_extension(tw_dev)) {
> +		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Failed to initialize
> device extension");
> +		goto out_free_device_extension;
> +	}
> +
> +	/* Request IO regions */
> +	retval = pci_request_regions(pdev, "3w-sas");
> +	if (retval) {
> +		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Failed to get mem region");
> +		goto out_free_device_extension;
> +	}
> +
> +	/* Use region 1 */
> +	mem_addr = pci_resource_start(pdev, 1);
> +	mem_len = pci_resource_len(pdev, 1);
> +
> +	/* Save base address */
> +	tw_dev->base_addr = ioremap(mem_addr, mem_len);

tw_dev->base_addr = pci_iomap(pdev, 1, 0);

> +	if (!tw_dev->base_addr) {
> +		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to ioremap");
> +		goto out_release_mem_region;
> +	}
> +
> +	/* Disable interrupts on the card */
> +	TWL_MASK_INTERRUPTS(tw_dev);
> +
> +	/* Initialize the card */
> +	if (twl_reset_sequence(tw_dev, 0)) {
> +		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Controller reset failed
> during probe");
> +		goto out_iounmap;
> +	}
> +
> +	/* Set host specific parameters */
> +	host->max_id = TW_MAX_UNITS;
> +	host->max_cmd_len = TW_MAX_CDB_LEN;
> +	host->max_lun = TW_MAX_LUNS;
> +	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, 0x1e, "scsi add host failed");
> +		goto out_iounmap;
> +	}
> +
> +	pci_set_drvdata(pdev, host);
> +
> +	printk(KERN_WARNING "3w-sas: scsi%d: Found an LSI 3ware %s
> Controller at 0x%llx, IRQ: %d.\n",
> +	       host->host_no,
> +	       (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
> +				     TW_PARAM_MODEL, TW_PARAM_MODEL_LENGTH),
> +	       (u64)mem_addr, pdev->irq);
> +
> +	ptr_phycount = twl_get_param(tw_dev, 2, TW_PARAM_PHY_SUMMARY_TABLE,
> +				     TW_PARAM_PHYCOUNT, TW_PARAM_PHYCOUNT_LENGTH);
> +	if (ptr_phycount)
> +		phycount = le32_to_cpu(*(int *)ptr_phycount);
> +
> +	printk(KERN_WARNING "3w-sas: scsi%d: Firmware %s, BIOS %s, Phys: %d.\n",
> +	       host->host_no,
> +	       (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
> +				     TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
> +	       (char *)twl_get_param(tw_dev, 2, TW_VERSION_TABLE,
> +				     TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
> +	       phycount);
> +
> +	/* Try to enable MSI */
> +	if (use_msi && !pci_enable_msi(pdev))
> +		set_bit(TW_USING_MSI, &tw_dev->flags);
> +
> +	/* Now setup the interrupt handler */
> +	retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas",
>  tw_dev); +	if (retval) {
> +		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ");
> +		goto out_remove_host;
> +	}

If you're using MSI you should not pass IRQF_SHARED here.

> +/* PCI Devices supported by this driver */
> +static struct pci_device_id twl_pci_tbl[] __devinitdata = {
> +	{ PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9750,
> +	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
> +	{ }
> +};

PCI_VDEVICE(3WARE, PCI_DEVICE_ID_3WARE_9750)

> +MODULE_DEVICE_TABLE(pci, twl_pci_tbl);
> +
> +/* pci_driver initializer */
> +static struct pci_driver twl_driver = {
> +	.name		= "3w-sas",

You probably should put that string in some constant and use it all over the 
place.

> +/* This function is called on driver initialization */
> +static int __init twl_init(void)
> +{
> +	printk(KERN_WARNING "LSI 3ware SAS/SATA-RAID Controller device
> driver for Linux v%s.\n", TW_DRIVER_VERSION);

Ehm, no, that is no warning.

> +	return pci_register_driver(&twl_driver);
> +} /* End twl_init() */

> +/* AEN severity table */
> +static char *twl_aen_severity_table[] =
> +{
> +	"None", "ERROR", "WARNING", "INFO", "DEBUG", (char*) 0
> +};

NULL instead of (char*) 0

> +/* Register access macros */
> +#define TWL_STATUS_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_STATUS)
> +#define TWL_HOBQPL_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_HOBQPL)
> +#define TWL_HOBQPH_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_HOBQPH)
> +#define TWL_HOBDB_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_HOBDB)
> +#define TWL_HOBDBC_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_HOBDBC)
> +#define TWL_HIMASK_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_HIMASK)
> +#define TWL_HISTAT_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_HISTAT)
> +#define TWL_HIBQPH_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_HIBQPH)
> +#define TWL_HIBQPL_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_HIBQPL)
> +#define TWL_HIBDB_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_HIBDB)
> +#define TWL_SCRPD3_REG_ADDR(x) ((unsigned char __iomem *)x->base_addr
> + TWL_SCRPD3)

You can add to a void pointer, this is equivalent. So you might not need to 
cast here at all.

> +/* Macros */
> +#define TW_PRINTK(h,a,b,c) { \
> +if (h) \
> +printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X):
> %s.\n",h->host_no,a,b,c); \

shost_printk

> +else \
> +printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s.\n",a,b,c); \

pr_warning

> +}

Also I don't see a point where you don't pass a host to that makro at all.

HTH

Eike

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Re: [PATCH] Add new driver for LSI 3ware 9750

[Matthew Wilcox]

On Wed, Oct 21, 2009 at 05:27:27PM +0200, Rolf Eike Beer wrote:
> > +	/* Try to enable MSI */
> > +	if (use_msi && !pci_enable_msi(pdev))
> > +		set_bit(TW_USING_MSI, &tw_dev->flags);
> > +
> > +	/* Now setup the interrupt handler */
> > +	retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas",
> >  tw_dev); +	if (retval) {
> > +		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ");
> > +		goto out_remove_host;
> > +	}
> 
> If you're using MSI you should not pass IRQF_SHARED here.

That's not true.  While it is currently the case that each MSI gets its
own vector, if you have a machine with sufficiently many interrupt sources
and insufficiently many interrupt vectors, it is possible we'll have to
share interrupt vectors.  The PCI MSI code does not support this yet,
but it may have to in the future, and it would be unpleasant to have to
go through and change all the device drivers.

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."

Re: [PATCH] Add new driver for LSI 3ware 9750

[Bartlomiej Zolnierkiewicz]

Hi,

On Wednesday 21 October 2009 02:22:15 adam radford wrote:
> James, linux-scsi,
> 
> This patch adds a new driver '3w-sas' for the LSI 3ware 9750 6Gb/s
> SAS/SATA-RAID controllers.
> 
> - I have tested this code to work on 32-bit, 64-bit, PAE, PPC-64.
> - This code contains a legacy interface that works with open-source
> smartmontools software at
>   http://sourceforge.net/projects/smartmontools.
> 
> Signed-off-by: Adam Radford <aradford@gmail.com>

This driver seems to contain some code which could be shared with
3w-9xxx driver.  Would it be possible to move the common code to
mini library shared by both drivers to avoid needless duplication?

-- 
Bartlomiej Zolnierkiewicz

Re: [PATCH] Add new driver for LSI 3ware 9750

[Rolf Eike Beer]

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Am Freitag 23 Oktober 2009 13:21:38 schrieb Matthew Wilcox:
> On Wed, Oct 21, 2009 at 05:27:27PM +0200, Rolf Eike Beer wrote:
> > > +	/* Try to enable MSI */
> > > +	if (use_msi && !pci_enable_msi(pdev))
> > > +		set_bit(TW_USING_MSI, &tw_dev->flags);
> > > +
> > > +	/* Now setup the interrupt handler */
> > > +	retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas",
> > >  tw_dev); +	if (retval) {
> > > +		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ");
> > > +		goto out_remove_host;
> > > +	}
> >
> > If you're using MSI you should not pass IRQF_SHARED here.
> 
> That's not true.  While it is currently the case that each MSI gets its
> own vector, if you have a machine with sufficiently many interrupt sources
> and insufficiently many interrupt vectors, it is possible we'll have to
> share interrupt vectors.  The PCI MSI code does not support this yet,
> but it may have to in the future, and it would be unpleasant to have to
> go through and change all the device drivers.

Sounds reasonable. Anyway I've seen the exact opposite comment from Chris (CC 
added) in his review of VMware's driver (Message-ID: 
<20091013053726.GE17547@sequoia.sous-sol.org> from Mon, 12 Oct 2009 22:37:26 
-0700).

Either way is fine for me, I just would like to have a common agreement on 
that.

Eike

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Re: [PATCH] Add new driver for LSI 3ware 9750

[James Bottomley]

On Thu, 2009-10-29 at 20:14 +0100, Rolf Eike Beer wrote:
> Am Freitag 23 Oktober 2009 13:21:38 schrieb Matthew Wilcox:
> > On Wed, Oct 21, 2009 at 05:27:27PM +0200, Rolf Eike Beer wrote:
> > > > +	/* Try to enable MSI */
> > > > +	if (use_msi && !pci_enable_msi(pdev))
> > > > +		set_bit(TW_USING_MSI, &tw_dev->flags);
> > > > +
> > > > +	/* Now setup the interrupt handler */
> > > > +	retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas",
> > > >  tw_dev); +	if (retval) {
> > > > +		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ");
> > > > +		goto out_remove_host;
> > > > +	}
> > >
> > > If you're using MSI you should not pass IRQF_SHARED here.
> > 
> > That's not true.  While it is currently the case that each MSI gets its
> > own vector, if you have a machine with sufficiently many interrupt sources
> > and insufficiently many interrupt vectors, it is possible we'll have to
> > share interrupt vectors.  The PCI MSI code does not support this yet,
> > but it may have to in the future, and it would be unpleasant to have to
> > go through and change all the device drivers.
> 
> Sounds reasonable. Anyway I've seen the exact opposite comment from Chris (CC 
> added) in his review of VMware's driver (Message-ID: 
> <20091013053726.GE17547@sequoia.sous-sol.org> from Mon, 12 Oct 2009 22:37:26 
> -0700).
> 
> Either way is fine for me, I just would like to have a common agreement on 
> that.

I think the correct way to look at this is that IRQF_SHARED is a
statement the driver makes about its interrupt routine:  That it
correctly checks if the irq was destined for it and returns IRQ_HANDLED
in that case.  This is still a true statement regardless of whether the
interrupt can be physically shared or not.

James

[PATCH Resend 3/3] pm8001:fix for allocate proper tag for per ccb fix error out and cleanup code

[jack_wang]

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From 58e8312a46484de077c9aec8e10bb95f794ca684 Mon Sep 17 00:00:00 2001
From: Jack Wang <jack_wang@usish.com>
Date: Fri, 30 Oct 2009 17:30:56 +0800
Subject: [PATCH 3/3] fixes for tag alloc,error goto and printk cleanup

Alloc right size for bitmap tag,fix error goto and cleanup print message and
undocable commemts.

Signed-off-by: Lindar Liu <lindar_liu@usish.com>
Signed-off-by: Jack Wang <jack_wang@usish.com>
---
 drivers/scsi/pm8001/pm8001_init.c |   11 +++++++----
 drivers/scsi/pm8001/pm8001_sas.c  |   34 +++++++++++++++-------------------
 2 files changed, 22 insertions(+), 23 deletions(-)

diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c
index 811b5d3..42ebe72 100644
--- a/drivers/scsi/pm8001/pm8001_init.c
+++ b/drivers/scsi/pm8001/pm8001_init.c
@@ -203,9 +203,9 @@ static int __devinit pm8001_alloc(struct pm8001_hba_info *pm8001_ha)
 	for (i = 0; i < pm8001_ha->chip->n_phy; i++)
 		pm8001_phy_init(pm8001_ha, i);
 
-	pm8001_ha->tags = kmalloc(sizeof(*pm8001_ha->tags)*PM8001_MAX_DEVICES,
-		GFP_KERNEL);
-
+	pm8001_ha->tags = kzalloc(PM8001_MAX_CCB, GFP_KERNEL);
+	if (!pm8001_ha->tags)
+		goto err_out;
 	/* MPI Memory region 1 for AAP Event Log for fw */
 	pm8001_ha->memoryMap.region[AAP1].num_elements = 1;
 	pm8001_ha->memoryMap.region[AAP1].element_size = PM8001_EVENT_LOG_SIZE;
@@ -287,6 +287,9 @@ static int __devinit pm8001_alloc(struct pm8001_hba_info *pm8001_ha)
 		pm8001_ha->ccb_info[i].ccb_dma_handle =
 			pm8001_ha->memoryMap.region[CCB_MEM].phys_addr +
 			i * sizeof(struct pm8001_ccb_info);
+		pm8001_ha->ccb_info[i].task = NULL;
+		pm8001_ha->ccb_info[i].ccb_tag = 0xffffffff;
+		pm8001_ha->ccb_info[i].device = NULL;
 		++pm8001_ha->tags_num;
 	}
 	pm8001_ha->flags = PM8001F_INIT_TIME;
@@ -578,7 +581,7 @@ static u32 pm8001_request_irq(struct pm8001_hba_info *pm8001_ha)
 {
 	struct pci_dev *pdev;
 	irq_handler_t irq_handler = pm8001_interrupt;
-	u32 rc;
+	int rc;
 
 	pdev = pm8001_ha->pdev;
 
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index 1e840fd..752acad 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -330,15 +330,12 @@ int pm8001_slave_configure(struct scsi_device *sdev)
 	return 0;
 }
 /**
-  * pm8001_task_exec -execute the task which come from upper level, send the
-  * command or data to DMA area and then increase CI,for queuecommand(ssp),
-  * it is from upper layer and for smp command,it is from libsas,
-  * for ata command it is from libata.
+  * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
   * @task: the task to be execute.
   * @num: if can_queue great than 1, the task can be queued up. for SMP task,
   * we always execute one one time.
   * @gfp_flags: gfp_flags.
-  * @is tmf: if it is task management task.
+  * @is_tmf: if it is task management task.
   * @tmf: the task management IU
   */
 #define DEV_IS_GONE(pm8001_dev)	\
@@ -379,7 +376,7 @@ static int pm8001_task_exec(struct sas_task *task, const int num,
 					pm8001_printk("device %016llx not "
 					"ready.\n", SAS_ADDR(dev->sas_addr)));
 			}
-		rc = SAS_PHY_DOWN;
+			rc = SAS_PHY_DOWN;
 			goto out_done;
 		}
 		rc = pm8001_tag_alloc(pm8001_ha, &tag);
@@ -395,14 +392,14 @@ static int pm8001_task_exec(struct sas_task *task, const int num,
 					t->data_dir);
 				if (!n_elem) {
 					rc = -ENOMEM;
-					goto err_out;
+					goto err_out_tag;
 				}
 			}
 		} else {
 			n_elem = t->num_scatter;
 		}
 
-		t->lldd_task = NULL;
+		t->lldd_task = ccb;
 		ccb->n_elem = n_elem;
 		ccb->ccb_tag = tag;
 		ccb->task = t;
@@ -435,7 +432,6 @@ static int pm8001_task_exec(struct sas_task *task, const int num,
 				pm8001_printk("rc is %x\n", rc));
 			goto err_out_tag;
 		}
-		t->lldd_task = ccb;
 		/* TODO: select normal or high priority */
 		spin_lock(&t->task_state_lock);
 		t->task_state_flags |= SAS_TASK_AT_INITIATOR;
@@ -737,9 +733,9 @@ static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 			res = -EMSGSIZE;
 			break;
 		} else {
-			PM8001_IO_DBG(pm8001_ha,
-			pm8001_printk(" Task to dev %016llx response: 0x%x"
-				"status 0x%x\n",
+			PM8001_EH_DBG(pm8001_ha,
+				pm8001_printk(" Task to dev %016llx response:"
+				"0x%x status 0x%x\n",
 				SAS_ADDR(dev->sas_addr),
 				task->task_status.resp,
 				task->task_status.stat));
@@ -760,7 +756,7 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 	u32 task_tag)
 {
 	int res, retry;
-	u32 rc, ccb_tag;
+	u32 ccb_tag;
 	struct pm8001_ccb_info *ccb;
 	struct sas_task *task = NULL;
 
@@ -777,9 +773,9 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 		task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 		add_timer(&task->timer);
 
-		rc = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
-		if (rc)
-			return rc;
+		res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
+		if (res)
+			return res;
 		ccb = &pm8001_ha->ccb_info[ccb_tag];
 		ccb->device = pm8001_dev;
 		ccb->ccb_tag = ccb_tag;
@@ -812,7 +808,7 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 			break;
 
 		} else {
-			PM8001_IO_DBG(pm8001_ha,
+			PM8001_EH_DBG(pm8001_ha,
 				pm8001_printk(" Task to dev %016llx response: "
 					"0x%x status 0x%x\n",
 				SAS_ADDR(dev->sas_addr),
@@ -1027,8 +1023,8 @@ int pm8001_abort_task(struct sas_task *task)
 		}
 		device_id = pm8001_dev->device_id;
 		PM8001_EH_DBG(pm8001_ha,
-		pm8001_printk("abort io to device_id = %d\n", device_id));
-		tmf_task.tmf = 	TMF_ABORT_TASK;
+			pm8001_printk("abort io to deviceid= %d\n", device_id));
+		tmf_task.tmf = TMF_ABORT_TASK;
 		tmf_task.tag_of_task_to_be_managed = tag;
 		rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
 		rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
-- 
1.6.4.msysgit.0

Re: [PATCH] Add new driver for LSI 3ware 9750

[Bartlomiej Zolnierkiewicz]

On Friday 23 October 2009 15:53:09 Bartlomiej Zolnierkiewicz wrote:
> 
> Hi,
> 
> On Wednesday 21 October 2009 02:22:15 adam radford wrote:
> > James, linux-scsi,
> > 
> > This patch adds a new driver '3w-sas' for the LSI 3ware 9750 6Gb/s
> > SAS/SATA-RAID controllers.
> > 
> > - I have tested this code to work on 32-bit, 64-bit, PAE, PPC-64.
> > - This code contains a legacy interface that works with open-source
> > smartmontools software at
> >   http://sourceforge.net/projects/smartmontools.
> > 
> > Signed-off-by: Adam Radford <aradford@gmail.com>
> 
> This driver seems to contain some code which could be shared with
> 3w-9xxx driver.  Would it be possible to move the common code to
> mini library shared by both drivers to avoid needless duplication?

Did you have a chance to look into it?

-- 
Bartlomiej Zolnierkiewicz