[SCSI] 3w-sas: Add new driver for LSI 3ware 9750
authoradam radford <aradford@gmail.com>
Fri, 23 Oct 2009 21:52:33 +0000 (14:52 -0700)
committerJames Bottomley <James.Bottomley@suse.de>
Fri, 4 Dec 2009 18:00:51 +0000 (12:00 -0600)
[jejb: fix up for new queue depth code]
Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
drivers/scsi/3w-sas.c [new file with mode: 0644]
drivers/scsi/3w-sas.h [new file with mode: 0644]
drivers/scsi/Kconfig
drivers/scsi/Makefile

diff --git a/drivers/scsi/3w-sas.c b/drivers/scsi/3w-sas.c
new file mode 100644 (file)
index 0000000..4d314d7
--- /dev/null
@@ -0,0 +1,1924 @@
+/*
+   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;
+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,
+                                 int reason)
+{
+       if (reason != SCSI_QDEPTH_DEFAULT)
+               return -EOPNOTSUPP;
+
+       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));
+               if (length) {
+                       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), length ? 1 : 0));
+       } else {
+               oldcommand = &full_command_packet->command.oldcommand;
+               oldcommand->request_id = request_id;
+
+               if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
+                       /* Load the sg list */
+                       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;
+       TW_Device_Extension *tw_dev;
+
+       tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
+
+       if (capacity >= 0x200000) {
+               heads = 255;
+               sectors = 63;
+       } else {
+               heads = 64;
+               sectors = 32;
+       }
+
+       geom[0] = heads;
+       geom[1] = sectors;
+       geom[2] = sector_div(capacity, heads * sectors); /* 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;
+       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 = 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;
+       }
+
+       /* Save base address, use region 1 */
+       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)pci_resource_start(pdev, 1), 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_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",
+       .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_INFO "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 --git a/drivers/scsi/3w-sas.h b/drivers/scsi/3w-sas.h
new file mode 100644 (file)
index 0000000..d474892
--- /dev/null
@@ -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", NULL
+};
+
+/* 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 */
+
index 1895259..b4d8d63 100644 (file)
@@ -399,6 +399,17 @@ config SCSI_3W_9XXX
          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
index 5026bdc..280d3c6 100644 (file)
@@ -114,6 +114,7 @@ obj-$(CONFIG_SCSI_MESH)             += mesh.o
 obj-$(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