--- /dev/null
+/*
+ 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/slab.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 DEFINE_MUTEX(twl_chrdev_mutex);
+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 file *filp, 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 file *filp, 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() */
+
+/* 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 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 = scsi_dma_map(srb);
+ if (sg_count <= 0)
+ goto out;
+
+ scsi_for_each_sg(srb, sg, sg_count, i) {
+ command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg));
+ command_packet->sg_list[i].length = 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_zalloc_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;
+ }
+
+ 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 long twl_chrdev_ioctl(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;
+ struct inode *inode = file_inode(file);
+ 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;
+
+ mutex_lock(&twl_chrdev_mutex);
+
+ /* 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:
+ mutex_unlock(&twl_chrdev_mutex);
+ 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;
+ }
+
+ 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,
+ .unlocked_ioctl = twl_chrdev_ioctl,
+ .open = twl_chrdev_open,
+ .release = NULL,
+ .llseek = noop_llseek,
+};
+
+/* 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 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 */
+ scsi_dma_unmap(cmd);
+ cmd->scsi_done(cmd);
+ tw_dev->state[request_id] = TW_S_COMPLETED;
+ twl_free_request_id(tw_dev, request_id);
+ tw_dev->posted_request_count--;
+ }
+
+ /* 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)) {
+ struct scsi_cmnd *cmd = tw_dev->srb[i];
+
+ if (cmd) {
+ cmd->result = (DID_RESET << 16);
+ scsi_dma_unmap(cmd);
+ cmd->scsi_done(cmd);
+ }
+ }
+ }
+
+ /* Reset queues and counts */
+ for (i = 0; i < TW_Q_LENGTH; i++) {
+ tw_dev->free_queue[i] = i;
+ tw_dev->state[i] = TW_S_INITIAL;
+ }
+ tw_dev->free_head = TW_Q_START;
+ tw_dev->free_tail = TW_Q_START;
+ tw_dev->posted_request_count = 0;
+
+ 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_lck(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;
+
+ 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() */
+
+static DEF_SCSI_QCMD(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 = scsi_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,
+ .no_write_same = 1,
+};
+
+/* This function will probe and initialize a card */
+static int 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[] = {
+ { 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);
+
Code Review / kvmfornfv.git / blobdiff