drivers/scsi/3w-9xxx.c

   1 /*
   2    3w-9xxx.c -- 3ware 9000 Storage Controller device driver for Linux.
   3
   4    Written By: Adam Radford <linuxraid@amcc.com>
   5    Modifications By: Tom Couch <linuxraid@amcc.com>
   6
   7    Copyright (C) 2004-2007 Applied Micro Circuits Corporation.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; version 2 of the License.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    NO WARRANTY
  19    THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  20    CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  21    LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  22    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  23    solely responsible for determining the appropriateness of using and
  24    distributing the Program and assumes all risks associated with its
  25    exercise of rights under this Agreement, including but not limited to
  26    the risks and costs of program errors, damage to or loss of data,
  27    programs or equipment, and unavailability or interruption of operations.
  28
  29    DISCLAIMER OF LIABILITY
  30    NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  31    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32    DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  33    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  35    USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  36    HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  37
  38    You should have received a copy of the GNU General Public License
  39    along with this program; if not, write to the Free Software
  40    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  41
  42    Bugs/Comments/Suggestions should be mailed to:
  43    linuxraid@amcc.com
  44
  45    For more information, goto:
  46    http://www.amcc.com
  47
  48    Note: This version of the driver does not contain a bundled firmware
  49          image.
  50
  51    History
  52    -------
  53    2.26.02.000 - Driver cleanup for kernel submission.
  54    2.26.02.001 - Replace schedule_timeout() calls with msleep().
  55    2.26.02.002 - Add support for PAE mode.
  56                  Add lun support.
  57                  Fix twa_remove() to free irq handler/unregister_chrdev()
  58                  before shutting down card.
  59                  Change to new 'change_queue_depth' api.
  60                  Fix 'handled=1' ISR usage, remove bogus IRQ check.
  61                  Remove un-needed eh_abort handler.
  62                  Add support for embedded firmware error strings.
  63    2.26.02.003 - Correctly handle single sgl's with use_sg=1.
  64    2.26.02.004 - Add support for 9550SX controllers.
  65    2.26.02.005 - Fix use_sg == 0 mapping on systems with 4GB or higher.
  66    2.26.02.006 - Fix 9550SX pchip reset timeout.
  67                  Add big endian support.
  68    2.26.02.007 - Disable local interrupts during kmap/unmap_atomic().
  69    2.26.02.008 - Free irq handler in __twa_shutdown().
  70                  Serialize reset code.
  71                  Add support for 9650SE controllers.
  72    2.26.02.009 - Fix dma mask setting to fallback to 32-bit if 64-bit fails.
  73    2.26.02.010 - Add support for 9690SA controllers.
  74 */
  75
  76 #include <linux/module.h>
  77 #include <linux/reboot.h>
  78 #include <linux/spinlock.h>
  79 #include <linux/interrupt.h>
  80 #include <linux/moduleparam.h>
  81 #include <linux/errno.h>
  82 #include <linux/types.h>
  83 #include <linux/delay.h>
  84 #include <linux/pci.h>
  85 #include <linux/time.h>
  86 #include <linux/mutex.h>
  87 #include <asm/io.h>
  88 #include <asm/irq.h>
  89 #include <asm/uaccess.h>
  90 #include <scsi/scsi.h>
  91 #include <scsi/scsi_host.h>
  92 #include <scsi/scsi_tcq.h>
  93 #include <scsi/scsi_cmnd.h>
  94 #include "3w-9xxx.h"
  95
  96 /* Globals */
  97 #define TW_DRIVER_VERSION "2.26.02.010"
  98 static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT];
  99 static unsigned int twa_device_extension_count;
 100 static int twa_major = -1;
 101 extern struct timezone sys_tz;
 102
 103 /* Module parameters */
 104 MODULE_AUTHOR ("AMCC");
 105 MODULE_DESCRIPTION ("3ware 9000 Storage Controller Linux Driver");
 106 MODULE_LICENSE("GPL");
 107 MODULE_VERSION(TW_DRIVER_VERSION);
 108
 109 /* Function prototypes */
 110 static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header);
 111 static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id);
 112 static char *twa_aen_severity_lookup(unsigned char severity_code);
 113 static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id);
 114 static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
 115 static int twa_chrdev_open(struct inode *inode, struct file *file);
 116 static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host);
 117 static void twa_free_request_id(TW_Device_Extension *tw_dev,int request_id);
 118 static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id);
 119 static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
 120                               u32 set_features, unsigned short current_fw_srl,
 121                               unsigned short current_fw_arch_id,
 122                               unsigned short current_fw_branch,
 123                               unsigned short current_fw_build,
 124                               unsigned short *fw_on_ctlr_srl,
 125                               unsigned short *fw_on_ctlr_arch_id,
 126                               unsigned short *fw_on_ctlr_branch,
 127                               unsigned short *fw_on_ctlr_build,
 128                               u32 *init_connect_result);
 129 static void twa_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length);
 130 static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds);
 131 static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds);
 132 static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal);
 133 static int twa_reset_device_extension(TW_Device_Extension *tw_dev);
 134 static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset);
 135 static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg);
 136 static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id);
 137 static char *twa_string_lookup(twa_message_type *table, unsigned int aen_code);
 138 static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id);
 139
 140 /* Functions */
 141
 142 /* Show some statistics about the card */
 143 static ssize_t twa_show_stats(struct device *dev,
 144                               struct device_attribute *attr, char *buf)
 145 {
 146         struct Scsi_Host *host = class_to_shost(dev);
 147         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
 148         unsigned long flags = 0;
 149         ssize_t len;
 150
 151         spin_lock_irqsave(tw_dev->host->host_lock, flags);
 152         len = snprintf(buf, PAGE_SIZE, "3w-9xxx Driver version: %s\n"
 153                        "Current commands posted:   %4d\n"
 154                        "Max commands posted:       %4d\n"
 155                        "Current pending commands:  %4d\n"
 156                        "Max pending commands:      %4d\n"
 157                        "Last sgl length:           %4d\n"
 158                        "Max sgl length:            %4d\n"
 159                        "Last sector count:         %4d\n"
 160                        "Max sector count:          %4d\n"
 161                        "SCSI Host Resets:          %4d\n"
 162                        "AEN's:                     %4d\n",
 163                        TW_DRIVER_VERSION,
 164                        tw_dev->posted_request_count,
 165                        tw_dev->max_posted_request_count,
 166                        tw_dev->pending_request_count,
 167                        tw_dev->max_pending_request_count,
 168                        tw_dev->sgl_entries,
 169                        tw_dev->max_sgl_entries,
 170                        tw_dev->sector_count,
 171                        tw_dev->max_sector_count,
 172                        tw_dev->num_resets,
 173                        tw_dev->aen_count);
 174         spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 175         return len;
 176 } /* End twa_show_stats() */
 177
 178 /* This function will set a devices queue depth */
 179 static int twa_change_queue_depth(struct scsi_device *sdev, int queue_depth)
 180 {
 181         if (queue_depth > TW_Q_LENGTH-2)
 182                 queue_depth = TW_Q_LENGTH-2;
 183         scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
 184         return queue_depth;
 185 } /* End twa_change_queue_depth() */
 186
 187 /* Create sysfs 'stats' entry */
 188 static struct device_attribute twa_host_stats_attr = {
 189         .attr = {
 190                 .name =         "stats",
 191                 .mode =         S_IRUGO,
 192         },
 193         .show = twa_show_stats
 194 };
 195
 196 /* Host attributes initializer */
 197 static struct device_attribute *twa_host_attrs[] = {
 198         &twa_host_stats_attr,
 199         NULL,
 200 };
 201
 202 /* File operations struct for character device */
 203 static const struct file_operations twa_fops = {
 204         .owner          = THIS_MODULE,
 205         .ioctl          = twa_chrdev_ioctl,
 206         .open           = twa_chrdev_open,
 207         .release        = NULL
 208 };
 209
 210 /* This function will complete an aen request from the isr */
 211 static int twa_aen_complete(TW_Device_Extension *tw_dev, int request_id)
 212 {
 213         TW_Command_Full *full_command_packet;
 214         TW_Command *command_packet;
 215         TW_Command_Apache_Header *header;
 216         unsigned short aen;
 217         int retval = 1;
 218
 219         header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
 220         tw_dev->posted_request_count--;
 221         aen = le16_to_cpu(header->status_block.error);
 222         full_command_packet = tw_dev->command_packet_virt[request_id];
 223         command_packet = &full_command_packet->command.oldcommand;
 224
 225         /* First check for internal completion of set param for time sync */
 226         if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) {
 227                 /* Keep reading the queue in case there are more aen's */
 228                 if (twa_aen_read_queue(tw_dev, request_id))
 229                         goto out2;
 230                 else {
 231                         retval = 0;
 232                         goto out;
 233                 }
 234         }
 235
 236         switch (aen) {
 237         case TW_AEN_QUEUE_EMPTY:
 238                 /* Quit reading the queue if this is the last one */
 239                 break;
 240         case TW_AEN_SYNC_TIME_WITH_HOST:
 241                 twa_aen_sync_time(tw_dev, request_id);
 242                 retval = 0;
 243                 goto out;
 244         default:
 245                 twa_aen_queue_event(tw_dev, header);
 246
 247                 /* If there are more aen's, keep reading the queue */
 248                 if (twa_aen_read_queue(tw_dev, request_id))
 249                         goto out2;
 250                 else {
 251                         retval = 0;
 252                         goto out;
 253                 }
 254         }
 255         retval = 0;
 256 out2:
 257         tw_dev->state[request_id] = TW_S_COMPLETED;
 258         twa_free_request_id(tw_dev, request_id);
 259         clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
 260 out:
 261         return retval;
 262 } /* End twa_aen_complete() */
 263
 264 /* This function will drain aen queue */
 265 static int twa_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
 266 {
 267         int request_id = 0;
 268         char cdb[TW_MAX_CDB_LEN];
 269         TW_SG_Entry sglist[1];
 270         int finished = 0, count = 0;
 271         TW_Command_Full *full_command_packet;
 272         TW_Command_Apache_Header *header;
 273         unsigned short aen;
 274         int first_reset = 0, queue = 0, retval = 1;
 275
 276         if (no_check_reset)
 277                 first_reset = 0;
 278         else
 279                 first_reset = 1;
 280
 281         full_command_packet = tw_dev->command_packet_virt[request_id];
 282         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 283
 284         /* Initialize cdb */
 285         memset(&cdb, 0, TW_MAX_CDB_LEN);
 286         cdb[0] = REQUEST_SENSE; /* opcode */
 287         cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
 288
 289         /* Initialize sglist */
 290         memset(&sglist, 0, sizeof(TW_SG_Entry));
 291         sglist[0].length = TW_SECTOR_SIZE;
 292         sglist[0].address = tw_dev->generic_buffer_phys[request_id];
 293
 294         if (sglist[0].address & TW_ALIGNMENT_9000_SGL) {
 295                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Found unaligned address during AEN drain");
 296                 goto out;
 297         }
 298
 299         /* Mark internal command */
 300         tw_dev->srb[request_id] = NULL;
 301
 302         do {
 303                 /* Send command to the board */
 304                 if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
 305                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Error posting request sense");
 306                         goto out;
 307                 }
 308
 309                 /* Now poll for completion */
 310                 if (twa_poll_response(tw_dev, request_id, 30)) {
 311                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "No valid response while draining AEN queue");
 312                         tw_dev->posted_request_count--;
 313                         goto out;
 314                 }
 315
 316                 tw_dev->posted_request_count--;
 317                 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
 318                 aen = le16_to_cpu(header->status_block.error);
 319                 queue = 0;
 320                 count++;
 321
 322                 switch (aen) {
 323                 case TW_AEN_QUEUE_EMPTY:
 324                         if (first_reset != 1)
 325                                 goto out;
 326                         else
 327                                 finished = 1;
 328                         break;
 329                 case TW_AEN_SOFT_RESET:
 330                         if (first_reset == 0)
 331                                 first_reset = 1;
 332                         else
 333                                 queue = 1;
 334                         break;
 335                 case TW_AEN_SYNC_TIME_WITH_HOST:
 336                         break;
 337                 default:
 338                         queue = 1;
 339                 }
 340
 341                 /* Now queue an event info */
 342                 if (queue)
 343                         twa_aen_queue_event(tw_dev, header);
 344         } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN));
 345
 346         if (count == TW_MAX_AEN_DRAIN)
 347                 goto out;
 348
 349         retval = 0;
 350 out:
 351         tw_dev->state[request_id] = TW_S_INITIAL;
 352         return retval;
 353 } /* End twa_aen_drain_queue() */
 354
 355 /* This function will queue an event */
 356 static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
 357 {
 358         u32 local_time;
 359         struct timeval time;
 360         TW_Event *event;
 361         unsigned short aen;
 362         char host[16];
 363         char *error_str;
 364
 365         tw_dev->aen_count++;
 366
 367         /* Fill out event info */
 368         event = tw_dev->event_queue[tw_dev->error_index];
 369
 370         /* Check for clobber */
 371         host[0] = '\0';
 372         if (tw_dev->host) {
 373                 sprintf(host, " scsi%d:", tw_dev->host->host_no);
 374                 if (event->retrieved == TW_AEN_NOT_RETRIEVED)
 375                         tw_dev->aen_clobber = 1;
 376         }
 377
 378         aen = le16_to_cpu(header->status_block.error);
 379         memset(event, 0, sizeof(TW_Event));
 380
 381         event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
 382         do_gettimeofday(&time);
 383         local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60));
 384         event->time_stamp_sec = local_time;
 385         event->aen_code = aen;
 386         event->retrieved = TW_AEN_NOT_RETRIEVED;
 387         event->sequence_id = tw_dev->error_sequence_id;
 388         tw_dev->error_sequence_id++;
 389
 390         /* Check for embedded error string */
 391         error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]);
 392
 393         header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0';
 394         event->parameter_len = strlen(header->err_specific_desc);
 395         memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + (error_str[0] == '\0' ? 0 : (1 + strlen(error_str))));
 396         if (event->severity != TW_AEN_SEVERITY_DEBUG)
 397                 printk(KERN_WARNING "3w-9xxx:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
 398                        host,
 399                        twa_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
 400                        TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen,
 401                        error_str[0] == '\0' ? twa_string_lookup(twa_aen_table, aen) : error_str,
 402                        header->err_specific_desc);
 403         else
 404                 tw_dev->aen_count--;
 405
 406         if ((tw_dev->error_index + 1) == TW_Q_LENGTH)
 407                 tw_dev->event_queue_wrapped = 1;
 408         tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
 409 } /* End twa_aen_queue_event() */
 410
 411 /* This function will read the aen queue from the isr */
 412 static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
 413 {
 414         char cdb[TW_MAX_CDB_LEN];
 415         TW_SG_Entry sglist[1];
 416         TW_Command_Full *full_command_packet;
 417         int retval = 1;
 418
 419         full_command_packet = tw_dev->command_packet_virt[request_id];
 420         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 421
 422         /* Initialize cdb */
 423         memset(&cdb, 0, TW_MAX_CDB_LEN);
 424         cdb[0] = REQUEST_SENSE; /* opcode */
 425         cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
 426
 427         /* Initialize sglist */
 428         memset(&sglist, 0, sizeof(TW_SG_Entry));
 429         sglist[0].length = TW_SECTOR_SIZE;
 430         sglist[0].address = tw_dev->generic_buffer_phys[request_id];
 431
 432         /* Mark internal command */
 433         tw_dev->srb[request_id] = NULL;
 434
 435         /* Now post the command packet */
 436         if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
 437                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "Post failed while reading AEN queue");
 438                 goto out;
 439         }
 440         retval = 0;
 441 out:
 442         return retval;
 443 } /* End twa_aen_read_queue() */
 444
 445 /* This function will look up an AEN severity string */
 446 static char *twa_aen_severity_lookup(unsigned char severity_code)
 447 {
 448         char *retval = NULL;
 449
 450         if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) ||
 451             (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG))
 452                 goto out;
 453
 454         retval = twa_aen_severity_table[severity_code];
 455 out:
 456         return retval;
 457 } /* End twa_aen_severity_lookup() */
 458
 459 /* This function will sync firmware time with the host time */
 460 static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
 461 {
 462         u32 schedulertime;
 463         struct timeval utc;
 464         TW_Command_Full *full_command_packet;
 465         TW_Command *command_packet;
 466         TW_Param_Apache *param;
 467         u32 local_time;
 468
 469         /* Fill out the command packet */
 470         full_command_packet = tw_dev->command_packet_virt[request_id];
 471         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 472         command_packet = &full_command_packet->command.oldcommand;
 473         command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
 474         command_packet->request_id = request_id;
 475         command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
 476         command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
 477         command_packet->size = TW_COMMAND_SIZE;
 478         command_packet->byte6_offset.parameter_count = cpu_to_le16(1);
 479
 480         /* Setup the param */
 481         param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
 482         memset(param, 0, TW_SECTOR_SIZE);
 483         param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */
 484         param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
 485         param->parameter_size_bytes = cpu_to_le16(4);
 486
 487         /* Convert system time in UTC to local time seconds since last
 488            Sunday 12:00AM */
 489         do_gettimeofday(&utc);
 490         local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
 491         schedulertime = local_time - (3 * 86400);
 492         schedulertime = cpu_to_le32(schedulertime % 604800);
 493
 494         memcpy(param->data, &schedulertime, sizeof(u32));
 495
 496         /* Mark internal command */
 497         tw_dev->srb[request_id] = NULL;
 498
 499         /* Now post the command */
 500         twa_post_command_packet(tw_dev, request_id, 1);
 501 } /* End twa_aen_sync_time() */
 502
 503 /* This function will allocate memory and check if it is correctly aligned */
 504 static int twa_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
 505 {
 506         int i;
 507         dma_addr_t dma_handle;
 508         unsigned long *cpu_addr;
 509         int retval = 1;
 510
 511         cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
 512         if (!cpu_addr) {
 513                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
 514                 goto out;
 515         }
 516
 517         if ((unsigned long)cpu_addr % (TW_ALIGNMENT_9000)) {
 518                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x6, "Failed to allocate correctly aligned memory");
 519                 pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
 520                 goto out;
 521         }
 522
 523         memset(cpu_addr, 0, size*TW_Q_LENGTH);
 524
 525         for (i = 0; i < TW_Q_LENGTH; i++) {
 526                 switch(which) {
 527                 case 0:
 528                         tw_dev->command_packet_phys[i] = dma_handle+(i*size);
 529                         tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size));
 530                         break;
 531                 case 1:
 532                         tw_dev->generic_buffer_phys[i] = dma_handle+(i*size);
 533                         tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
 534                         break;
 535                 }
 536         }
 537         retval = 0;
 538 out:
 539         return retval;
 540 } /* End twa_allocate_memory() */
 541
 542 /* This function will check the status register for unexpected bits */
 543 static int twa_check_bits(u32 status_reg_value)
 544 {
 545         int retval = 1;
 546
 547         if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS)
 548                 goto out;
 549         if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0)
 550                 goto out;
 551
 552         retval = 0;
 553 out:
 554         return retval;
 555 } /* End twa_check_bits() */
 556
 557 /* This function will check the srl and decide if we are compatible  */
 558 static int twa_check_srl(TW_Device_Extension *tw_dev, int *flashed)
 559 {
 560         int retval = 1;
 561         unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0;
 562         unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0;
 563         u32 init_connect_result = 0;
 564
 565         if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
 566                                TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
 567                                TW_9000_ARCH_ID, TW_CURRENT_DRIVER_BRANCH,
 568                                TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl,
 569                                &fw_on_ctlr_arch_id, &fw_on_ctlr_branch,
 570                                &fw_on_ctlr_build, &init_connect_result)) {
 571                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "Initconnection failed while checking SRL");
 572                 goto out;
 573         }
 574
 575         tw_dev->tw_compat_info.working_srl = fw_on_ctlr_srl;
 576         tw_dev->tw_compat_info.working_branch = fw_on_ctlr_branch;
 577         tw_dev->tw_compat_info.working_build = fw_on_ctlr_build;
 578
 579         /* Try base mode compatibility */
 580         if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
 581                 if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
 582                                        TW_EXTENDED_INIT_CONNECT,
 583                                        TW_BASE_FW_SRL, TW_9000_ARCH_ID,
 584                                        TW_BASE_FW_BRANCH, TW_BASE_FW_BUILD,
 585                                        &fw_on_ctlr_srl, &fw_on_ctlr_arch_id,
 586                                        &fw_on_ctlr_branch, &fw_on_ctlr_build,
 587                                        &init_connect_result)) {
 588                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Initconnection (base mode) failed while checking SRL");
 589                         goto out;
 590                 }
 591                 if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
 592                         if (TW_CURRENT_DRIVER_SRL > fw_on_ctlr_srl) {
 593                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x32, "Firmware and driver incompatibility: please upgrade firmware");
 594                         } else {
 595                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x33, "Firmware and driver incompatibility: please upgrade driver");
 596                         }
 597                         goto out;
 598                 }
 599                 tw_dev->tw_compat_info.working_srl = TW_BASE_FW_SRL;
 600                 tw_dev->tw_compat_info.working_branch = TW_BASE_FW_BRANCH;
 601                 tw_dev->tw_compat_info.working_build = TW_BASE_FW_BUILD;
 602         }
 603
 604         /* Load rest of compatibility struct */
 605         strncpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION));
 606         tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL;
 607         tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH;
 608         tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD;
 609         tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL;
 610         tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH;
 611         tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD;
 612         tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl;
 613         tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch;
 614         tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build;
 615
 616         retval = 0;
 617 out:
 618         return retval;
 619 } /* End twa_check_srl() */
 620
 621 /* This function handles ioctl for the character device */
 622 static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 623 {
 624         long timeout;
 625         unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
 626         dma_addr_t dma_handle;
 627         int request_id = 0;
 628         unsigned int sequence_id = 0;
 629         unsigned char event_index, start_index;
 630         TW_Ioctl_Driver_Command driver_command;
 631         TW_Ioctl_Buf_Apache *tw_ioctl;
 632         TW_Lock *tw_lock;
 633         TW_Command_Full *full_command_packet;
 634         TW_Compatibility_Info *tw_compat_info;
 635         TW_Event *event;
 636         struct timeval current_time;
 637         u32 current_time_ms;
 638         TW_Device_Extension *tw_dev = twa_device_extension_list[iminor(inode)];
 639         int retval = TW_IOCTL_ERROR_OS_EFAULT;
 640         void __user *argp = (void __user *)arg;
 641
 642         /* Only let one of these through at a time */
 643         if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
 644                 retval = TW_IOCTL_ERROR_OS_EINTR;
 645                 goto out;
 646         }
 647
 648         /* First copy down the driver command */
 649         if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command)))
 650                 goto out2;
 651
 652         /* Check data buffer size */
 653         if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) {
 654                 retval = TW_IOCTL_ERROR_OS_EINVAL;
 655                 goto out2;
 656         }
 657
 658         /* Hardware can only do multiple of 512 byte transfers */
 659         data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511;
 660
 661         /* Now allocate ioctl buf memory */
 662         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);
 663         if (!cpu_addr) {
 664                 retval = TW_IOCTL_ERROR_OS_ENOMEM;
 665                 goto out2;
 666         }
 667
 668         tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
 669
 670         /* Now copy down the entire ioctl */
 671         if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1))
 672                 goto out3;
 673
 674         /* See which ioctl we are doing */
 675         switch (cmd) {
 676         case TW_IOCTL_FIRMWARE_PASS_THROUGH:
 677                 spin_lock_irqsave(tw_dev->host->host_lock, flags);
 678                 twa_get_request_id(tw_dev, &request_id);
 679
 680                 /* Flag internal command */
 681                 tw_dev->srb[request_id] = NULL;
 682
 683                 /* Flag chrdev ioctl */
 684                 tw_dev->chrdev_request_id = request_id;
 685
 686                 full_command_packet = &tw_ioctl->firmware_command;
 687
 688                 /* Load request id and sglist for both command types */
 689                 twa_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted);
 690
 691                 memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full));
 692
 693                 /* Now post the command packet to the controller */
 694                 twa_post_command_packet(tw_dev, request_id, 1);
 695                 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 696
 697                 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
 698
 699                 /* Now wait for command to complete */
 700                 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
 701
 702                 /* We timed out, and didn't get an interrupt */
 703                 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
 704                         /* Now we need to reset the board */
 705                         printk(KERN_WARNING "3w-9xxx: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
 706                                tw_dev->host->host_no, TW_DRIVER, 0x37,
 707                                cmd);
 708                         retval = TW_IOCTL_ERROR_OS_EIO;
 709                         twa_reset_device_extension(tw_dev);
 710                         goto out3;
 711                 }
 712
 713                 /* Now copy in the command packet response */
 714                 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full));
 715
 716                 /* Now complete the io */
 717                 spin_lock_irqsave(tw_dev->host->host_lock, flags);
 718                 tw_dev->posted_request_count--;
 719                 tw_dev->state[request_id] = TW_S_COMPLETED;
 720                 twa_free_request_id(tw_dev, request_id);
 721                 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 722                 break;
 723         case TW_IOCTL_GET_COMPATIBILITY_INFO:
 724                 tw_ioctl->driver_command.status = 0;
 725                 /* Copy compatiblity struct into ioctl data buffer */
 726                 tw_compat_info = (TW_Compatibility_Info *)tw_ioctl->data_buffer;
 727                 memcpy(tw_compat_info, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info));
 728                 break;
 729         case TW_IOCTL_GET_LAST_EVENT:
 730                 if (tw_dev->event_queue_wrapped) {
 731                         if (tw_dev->aen_clobber) {
 732                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 733                                 tw_dev->aen_clobber = 0;
 734                         } else
 735                                 tw_ioctl->driver_command.status = 0;
 736                 } else {
 737                         if (!tw_dev->error_index) {
 738                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 739                                 break;
 740                         }
 741                         tw_ioctl->driver_command.status = 0;
 742                 }
 743                 event_index = (tw_dev->error_index - 1 + TW_Q_LENGTH) % TW_Q_LENGTH;
 744                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 745                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 746                 break;
 747         case TW_IOCTL_GET_FIRST_EVENT:
 748                 if (tw_dev->event_queue_wrapped) {
 749                         if (tw_dev->aen_clobber) {
 750                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 751                                 tw_dev->aen_clobber = 0;
 752                         } else
 753                                 tw_ioctl->driver_command.status = 0;
 754                         event_index = tw_dev->error_index;
 755                 } else {
 756                         if (!tw_dev->error_index) {
 757                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 758                                 break;
 759                         }
 760                         tw_ioctl->driver_command.status = 0;
 761                         event_index = 0;
 762                 }
 763                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 764                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 765                 break;
 766         case TW_IOCTL_GET_NEXT_EVENT:
 767                 event = (TW_Event *)tw_ioctl->data_buffer;
 768                 sequence_id = event->sequence_id;
 769                 tw_ioctl->driver_command.status = 0;
 770
 771                 if (tw_dev->event_queue_wrapped) {
 772                         if (tw_dev->aen_clobber) {
 773                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 774                                 tw_dev->aen_clobber = 0;
 775                         }
 776                         start_index = tw_dev->error_index;
 777                 } else {
 778                         if (!tw_dev->error_index) {
 779                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 780                                 break;
 781                         }
 782                         start_index = 0;
 783                 }
 784                 event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id + 1) % TW_Q_LENGTH;
 785
 786                 if (!(tw_dev->event_queue[event_index]->sequence_id > sequence_id)) {
 787                         if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
 788                                 tw_dev->aen_clobber = 1;
 789                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 790                         break;
 791                 }
 792                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 793                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 794                 break;
 795         case TW_IOCTL_GET_PREVIOUS_EVENT:
 796                 event = (TW_Event *)tw_ioctl->data_buffer;
 797                 sequence_id = event->sequence_id;
 798                 tw_ioctl->driver_command.status = 0;
 799
 800                 if (tw_dev->event_queue_wrapped) {
 801                         if (tw_dev->aen_clobber) {
 802                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 803                                 tw_dev->aen_clobber = 0;
 804                         }
 805                         start_index = tw_dev->error_index;
 806                 } else {
 807                         if (!tw_dev->error_index) {
 808                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 809                                 break;
 810                         }
 811                         start_index = 0;
 812                 }
 813                 event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id - 1) % TW_Q_LENGTH;
 814
 815                 if (!(tw_dev->event_queue[event_index]->sequence_id < sequence_id)) {
 816                         if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
 817                                 tw_dev->aen_clobber = 1;
 818                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 819                         break;
 820                 }
 821                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 822                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 823                 break;
 824         case TW_IOCTL_GET_LOCK:
 825                 tw_lock = (TW_Lock *)tw_ioctl->data_buffer;
 826                 do_gettimeofday(&current_time);
 827                 current_time_ms = (current_time.tv_sec * 1000) + (current_time.tv_usec / 1000);
 828
 829                 if ((tw_lock->force_flag == 1) || (tw_dev->ioctl_sem_lock == 0) || (current_time_ms >= tw_dev->ioctl_msec)) {
 830                         tw_dev->ioctl_sem_lock = 1;
 831                         tw_dev->ioctl_msec = current_time_ms + tw_lock->timeout_msec;
 832                         tw_ioctl->driver_command.status = 0;
 833                         tw_lock->time_remaining_msec = tw_lock->timeout_msec;
 834                 } else {
 835                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_LOCKED;
 836                         tw_lock->time_remaining_msec = tw_dev->ioctl_msec - current_time_ms;
 837                 }
 838                 break;
 839         case TW_IOCTL_RELEASE_LOCK:
 840                 if (tw_dev->ioctl_sem_lock == 1) {
 841                         tw_dev->ioctl_sem_lock = 0;
 842                         tw_ioctl->driver_command.status = 0;
 843                 } else {
 844                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NOT_LOCKED;
 845                 }
 846                 break;
 847         default:
 848                 retval = TW_IOCTL_ERROR_OS_ENOTTY;
 849                 goto out3;
 850         }
 851
 852         /* Now copy the entire response to userspace */
 853         if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0)
 854                 retval = 0;
 855 out3:
 856         /* Now free ioctl buf memory */
 857         dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle);
 858 out2:
 859         mutex_unlock(&tw_dev->ioctl_lock);
 860 out:
 861         return retval;
 862 } /* End twa_chrdev_ioctl() */
 863
 864 /* This function handles open for the character device */
 865 static int twa_chrdev_open(struct inode *inode, struct file *file)
 866 {
 867         unsigned int minor_number;
 868         int retval = TW_IOCTL_ERROR_OS_ENODEV;
 869
 870         minor_number = iminor(inode);
 871         if (minor_number >= twa_device_extension_count)
 872                 goto out;
 873         retval = 0;
 874 out:
 875         return retval;
 876 } /* End twa_chrdev_open() */
 877
 878 /* This function will print readable messages from status register errors */
 879 static int twa_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value)
 880 {
 881         int retval = 1;
 882
 883         /* Check for various error conditions and handle them appropriately */
 884         if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
 885                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "PCI Parity Error: clearing");
 886                 writel(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
 887         }
 888
 889         if (status_reg_value & TW_STATUS_PCI_ABORT) {
 890                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "PCI Abort: clearing");
 891                 writel(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
 892                 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
 893         }
 894
 895         if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
 896                 if (((tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9650SE) &&
 897                      (tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9690SA)) ||
 898                     (!test_bit(TW_IN_RESET, &tw_dev->flags)))
 899                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Controller Queue Error: clearing");
 900                 writel(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
 901         }
 902
 903         if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
 904                 if (tw_dev->reset_print == 0) {
 905                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Microcontroller Error: clearing");
 906                         tw_dev->reset_print = 1;
 907                 }
 908                 goto out;
 909         }
 910         retval = 0;
 911 out:
 912         return retval;
 913 } /* End twa_decode_bits() */
 914
 915 /* This function will empty the response queue */
 916 static int twa_empty_response_queue(TW_Device_Extension *tw_dev)
 917 {
 918         u32 status_reg_value, response_que_value;
 919         int count = 0, retval = 1;
 920
 921         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
 922
 923         while (((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) && (count < TW_MAX_RESPONSE_DRAIN)) {
 924                 response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
 925                 status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
 926                 count++;
 927         }
 928         if (count == TW_MAX_RESPONSE_DRAIN)
 929                 goto out;
 930
 931         retval = 0;
 932 out:
 933         return retval;
 934 } /* End twa_empty_response_queue() */
 935
 936 /* This function will clear the pchip/response queue on 9550SX */
 937 static int twa_empty_response_queue_large(TW_Device_Extension *tw_dev)
 938 {
 939         u32 response_que_value = 0;
 940         unsigned long before;
 941         int retval = 1;
 942
 943         if (tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9000) {
 944                 before = jiffies;
 945                 while ((response_que_value & TW_9550SX_DRAIN_COMPLETED) != TW_9550SX_DRAIN_COMPLETED) {
 946                         response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR_LARGE(tw_dev));
 947                         msleep(1);
 948                         if (time_after(jiffies, before + HZ * 30))
 949                                 goto out;
 950                 }
 951                 /* P-chip settle time */
 952                 msleep(500);
 953                 retval = 0;
 954         } else
 955                 retval = 0;
 956 out:
 957         return retval;
 958 } /* End twa_empty_response_queue_large() */
 959
 960 /* This function passes sense keys from firmware to scsi layer */
 961 static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host)
 962 {
 963         TW_Command_Full *full_command_packet;
 964         unsigned short error;
 965         int retval = 1;
 966         char *error_str;
 967
 968         full_command_packet = tw_dev->command_packet_virt[request_id];
 969
 970         /* Check for embedded error string */
 971         error_str = &(full_command_packet->header.err_specific_desc[strlen(full_command_packet->header.err_specific_desc) + 1]);
 972
 973         /* Don't print error for Logical unit not supported during rollcall */
 974         error = le16_to_cpu(full_command_packet->header.status_block.error);
 975         if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE)) {
 976                 if (print_host)
 977                         printk(KERN_WARNING "3w-9xxx: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
 978                                tw_dev->host->host_no,
 979                                TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
 980                                full_command_packet->header.status_block.error,
 981                                error_str[0] == '\0' ?
 982                                twa_string_lookup(twa_error_table,
 983                                                  full_command_packet->header.status_block.error) : error_str,
 984                                full_command_packet->header.err_specific_desc);
 985                 else
 986                         printk(KERN_WARNING "3w-9xxx: ERROR: (0x%02X:0x%04X): %s:%s.\n",
 987                                TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
 988                                full_command_packet->header.status_block.error,
 989                                error_str[0] == '\0' ?
 990                                twa_string_lookup(twa_error_table,
 991                                                  full_command_packet->header.status_block.error) : error_str,
 992                                full_command_packet->header.err_specific_desc);
 993         }
 994
 995         if (copy_sense) {
 996                 memcpy(tw_dev->srb[request_id]->sense_buffer, full_command_packet->header.sense_data, TW_SENSE_DATA_LENGTH);
 997                 tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
 998                 retval = TW_ISR_DONT_RESULT;
 999                 goto out;
1000         }
1001         retval = 0;
1002 out:
1003         return retval;
1004 } /* End twa_fill_sense() */
1005
1006 /* This function will free up device extension resources */
1007 static void twa_free_device_extension(TW_Device_Extension *tw_dev)
1008 {
1009         if (tw_dev->command_packet_virt[0])
1010                 pci_free_consistent(tw_dev->tw_pci_dev,
1011                                     sizeof(TW_Command_Full)*TW_Q_LENGTH,
1012                                     tw_dev->command_packet_virt[0],
1013                                     tw_dev->command_packet_phys[0]);
1014
1015         if (tw_dev->generic_buffer_virt[0])
1016                 pci_free_consistent(tw_dev->tw_pci_dev,
1017                                     TW_SECTOR_SIZE*TW_Q_LENGTH,
1018                                     tw_dev->generic_buffer_virt[0],
1019                                     tw_dev->generic_buffer_phys[0]);
1020
1021         kfree(tw_dev->event_queue[0]);
1022 } /* End twa_free_device_extension() */
1023
1024 /* This function will free a request id */
1025 static void twa_free_request_id(TW_Device_Extension *tw_dev, int request_id)
1026 {
1027         tw_dev->free_queue[tw_dev->free_tail] = request_id;
1028         tw_dev->state[request_id] = TW_S_FINISHED;
1029         tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
1030 } /* End twa_free_request_id() */
1031
1032 /* This function will get parameter table entries from the firmware */
1033 static void *twa_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes)
1034 {
1035         TW_Command_Full *full_command_packet;
1036         TW_Command *command_packet;
1037         TW_Param_Apache *param;
1038         unsigned long param_value;
1039         void *retval = NULL;
1040
1041         /* Setup the command packet */
1042         full_command_packet = tw_dev->command_packet_virt[request_id];
1043         memset(full_command_packet, 0, sizeof(TW_Command_Full));
1044         command_packet = &full_command_packet->command.oldcommand;
1045
1046         command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1047         command_packet->size              = TW_COMMAND_SIZE;
1048         command_packet->request_id        = request_id;
1049         command_packet->byte6_offset.block_count = cpu_to_le16(1);
1050
1051         /* Now setup the param */
1052         param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
1053         memset(param, 0, TW_SECTOR_SIZE);
1054         param->table_id = cpu_to_le16(table_id | 0x8000);
1055         param->parameter_id = cpu_to_le16(parameter_id);
1056         param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes);
1057         param_value = tw_dev->generic_buffer_phys[request_id];
1058
1059         command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(param_value);
1060         command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
1061
1062         /* Post the command packet to the board */
1063         twa_post_command_packet(tw_dev, request_id, 1);
1064
1065         /* Poll for completion */
1066         if (twa_poll_response(tw_dev, request_id, 30))
1067                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "No valid response during get param")
1068         else
1069                 retval = (void *)&(param->data[0]);
1070
1071         tw_dev->posted_request_count--;
1072         tw_dev->state[request_id] = TW_S_INITIAL;
1073
1074         return retval;
1075 } /* End twa_get_param() */
1076
1077 /* This function will assign an available request id */
1078 static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id)
1079 {
1080         *request_id = tw_dev->free_queue[tw_dev->free_head];
1081         tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
1082         tw_dev->state[*request_id] = TW_S_STARTED;
1083 } /* End twa_get_request_id() */
1084
1085 /* This function will send an initconnection command to controller */
1086 static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
1087                               u32 set_features, unsigned short current_fw_srl,
1088                               unsigned short current_fw_arch_id,
1089                               unsigned short current_fw_branch,
1090                               unsigned short current_fw_build,
1091                               unsigned short *fw_on_ctlr_srl,
1092                               unsigned short *fw_on_ctlr_arch_id,
1093                               unsigned short *fw_on_ctlr_branch,
1094                               unsigned short *fw_on_ctlr_build,
1095                               u32 *init_connect_result)
1096 {
1097         TW_Command_Full *full_command_packet;
1098         TW_Initconnect *tw_initconnect;
1099         int request_id = 0, retval = 1;
1100
1101         /* Initialize InitConnection command packet */
1102         full_command_packet = tw_dev->command_packet_virt[request_id];
1103         memset(full_command_packet, 0, sizeof(TW_Command_Full));
1104         full_command_packet->header.header_desc.size_header = 128;
1105
1106         tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand;
1107         tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION);
1108         tw_initconnect->request_id = request_id;
1109         tw_initconnect->message_credits = cpu_to_le16(message_credits);
1110         tw_initconnect->features = set_features;
1111
1112         /* Turn on 64-bit sgl support if we need to */
1113         tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
1114
1115         tw_initconnect->features = cpu_to_le32(tw_initconnect->features);
1116
1117         if (set_features & TW_EXTENDED_INIT_CONNECT) {
1118                 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED;
1119                 tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl);
1120                 tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id);
1121                 tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch);
1122                 tw_initconnect->fw_build = cpu_to_le16(current_fw_build);
1123         } else
1124                 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE;
1125
1126         /* Send command packet to the board */
1127         twa_post_command_packet(tw_dev, request_id, 1);
1128
1129         /* Poll for completion */
1130         if (twa_poll_response(tw_dev, request_id, 30)) {
1131                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "No valid response during init connection");
1132         } else {
1133                 if (set_features & TW_EXTENDED_INIT_CONNECT) {
1134                         *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl);
1135                         *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id);
1136                         *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch);
1137                         *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build);
1138                         *init_connect_result = le32_to_cpu(tw_initconnect->result);
1139                 }
1140                 retval = 0;
1141         }
1142
1143         tw_dev->posted_request_count--;
1144         tw_dev->state[request_id] = TW_S_INITIAL;
1145
1146         return retval;
1147 } /* End twa_initconnection() */
1148
1149 /* This function will initialize the fields of a device extension */
1150 static int twa_initialize_device_extension(TW_Device_Extension *tw_dev)
1151 {
1152         int i, retval = 1;
1153
1154         /* Initialize command packet buffers */
1155         if (twa_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
1156                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Command packet memory allocation failed");
1157                 goto out;
1158         }
1159
1160         /* Initialize generic buffer */
1161         if (twa_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
1162                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x17, "Generic memory allocation failed");
1163                 goto out;
1164         }
1165
1166         /* Allocate event info space */
1167         tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL);
1168         if (!tw_dev->event_queue[0]) {
1169                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x18, "Event info memory allocation failed");
1170                 goto out;
1171         }
1172
1173
1174         for (i = 0; i < TW_Q_LENGTH; i++) {
1175                 tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event)));
1176                 tw_dev->free_queue[i] = i;
1177                 tw_dev->state[i] = TW_S_INITIAL;
1178         }
1179
1180         tw_dev->pending_head = TW_Q_START;
1181         tw_dev->pending_tail = TW_Q_START;
1182         tw_dev->free_head = TW_Q_START;
1183         tw_dev->free_tail = TW_Q_START;
1184         tw_dev->error_sequence_id = 1;
1185         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1186
1187         mutex_init(&tw_dev->ioctl_lock);
1188         init_waitqueue_head(&tw_dev->ioctl_wqueue);
1189
1190         retval = 0;
1191 out:
1192         return retval;
1193 } /* End twa_initialize_device_extension() */
1194
1195 /* This function is the interrupt service routine */
1196 static irqreturn_t twa_interrupt(int irq, void *dev_instance)
1197 {
1198         int request_id, error = 0;
1199         u32 status_reg_value;
1200         TW_Response_Queue response_que;
1201         TW_Command_Full *full_command_packet;
1202         TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
1203         int handled = 0;
1204
1205         /* Get the per adapter lock */
1206         spin_lock(tw_dev->host->host_lock);
1207
1208         /* Read the registers */
1209         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1210
1211         /* Check if this is our interrupt, otherwise bail */
1212         if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
1213                 goto twa_interrupt_bail;
1214
1215         handled = 1;
1216
1217         /* If we are resetting, bail */
1218         if (test_bit(TW_IN_RESET, &tw_dev->flags))
1219                 goto twa_interrupt_bail;
1220
1221         /* Check controller for errors */
1222         if (twa_check_bits(status_reg_value)) {
1223                 if (twa_decode_bits(tw_dev, status_reg_value)) {
1224                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1225                         goto twa_interrupt_bail;
1226                 }
1227         }
1228
1229         /* Handle host interrupt */
1230         if (status_reg_value & TW_STATUS_HOST_INTERRUPT)
1231                 TW_CLEAR_HOST_INTERRUPT(tw_dev);
1232
1233         /* Handle attention interrupt */
1234         if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
1235                 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
1236                 if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
1237                         twa_get_request_id(tw_dev, &request_id);
1238
1239                         error = twa_aen_read_queue(tw_dev, request_id);
1240                         if (error) {
1241                                 tw_dev->state[request_id] = TW_S_COMPLETED;
1242                                 twa_free_request_id(tw_dev, request_id);
1243                                 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
1244                         }
1245                 }
1246         }
1247
1248         /* Handle command interrupt */
1249         if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
1250                 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1251                 /* Drain as many pending commands as we can */
1252                 while (tw_dev->pending_request_count > 0) {
1253                         request_id = tw_dev->pending_queue[tw_dev->pending_head];
1254                         if (tw_dev->state[request_id] != TW_S_PENDING) {
1255                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x19, "Found request id that wasn't pending");
1256                                 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1257                                 goto twa_interrupt_bail;
1258                         }
1259                         if (twa_post_command_packet(tw_dev, request_id, 1)==0) {
1260                                 tw_dev->pending_head = (tw_dev->pending_head + 1) % TW_Q_LENGTH;
1261                                 tw_dev->pending_request_count--;
1262                         } else {
1263                                 /* If we get here, we will continue re-posting on the next command interrupt */
1264                                 break;
1265                         }
1266                 }
1267         }
1268
1269         /* Handle response interrupt */
1270         if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
1271
1272                 /* Drain the response queue from the board */
1273                 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
1274                         /* Complete the response */
1275                         response_que.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1276                         request_id = TW_RESID_OUT(response_que.response_id);
1277                         full_command_packet = tw_dev->command_packet_virt[request_id];
1278                         error = 0;
1279                         /* Check for command packet errors */
1280                         if (full_command_packet->command.newcommand.status != 0) {
1281                                 if (tw_dev->srb[request_id] != NULL) {
1282                                         error = twa_fill_sense(tw_dev, request_id, 1, 1);
1283                                 } else {
1284                                         /* Skip ioctl error prints */
1285                                         if (request_id != tw_dev->chrdev_request_id) {
1286                                                 error = twa_fill_sense(tw_dev, request_id, 0, 1);
1287                                         }
1288                                 }
1289                         }
1290
1291                         /* Check for correct state */
1292                         if (tw_dev->state[request_id] != TW_S_POSTED) {
1293                                 if (tw_dev->srb[request_id] != NULL) {
1294                                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Received a request id that wasn't posted");
1295                                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1296                                         goto twa_interrupt_bail;
1297                                 }
1298                         }
1299
1300                         /* Check for internal command completion */
1301                         if (tw_dev->srb[request_id] == NULL) {
1302                                 if (request_id != tw_dev->chrdev_request_id) {
1303                                         if (twa_aen_complete(tw_dev, request_id))
1304                                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Error completing AEN during attention interrupt");
1305                                 } else {
1306                                         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1307                                         wake_up(&tw_dev->ioctl_wqueue);
1308                                 }
1309                         } else {
1310                                 struct scsi_cmnd *cmd;
1311
1312                                 cmd = tw_dev->srb[request_id];
1313
1314                                 twa_scsiop_execute_scsi_complete(tw_dev, request_id);
1315                                 /* If no error command was a success */
1316                                 if (error == 0) {
1317                                         cmd->result = (DID_OK << 16);
1318                                 }
1319
1320                                 /* If error, command failed */
1321                                 if (error == 1) {
1322                                         /* Ask for a host reset */
1323                                         cmd->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
1324                                 }
1325
1326                                 /* Report residual bytes for single sgl */
1327                                 if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) {
1328                                         if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id]))
1329                                                 scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length);
1330                                 }
1331
1332                                 /* Now complete the io */
1333                                 tw_dev->state[request_id] = TW_S_COMPLETED;
1334                                 twa_free_request_id(tw_dev, request_id);
1335                                 tw_dev->posted_request_count--;
1336                                 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1337                                 twa_unmap_scsi_data(tw_dev, request_id);
1338                         }
1339
1340                         /* Check for valid status after each drain */
1341                         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1342                         if (twa_check_bits(status_reg_value)) {
1343                                 if (twa_decode_bits(tw_dev, status_reg_value)) {
1344                                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1345                                         goto twa_interrupt_bail;
1346                                 }
1347                         }
1348                 }
1349         }
1350
1351 twa_interrupt_bail:
1352         spin_unlock(tw_dev->host->host_lock);
1353         return IRQ_RETVAL(handled);
1354 } /* End twa_interrupt() */
1355
1356 /* This function will load the request id and various sgls for ioctls */
1357 static void twa_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length)
1358 {
1359         TW_Command *oldcommand;
1360         TW_Command_Apache *newcommand;
1361         TW_SG_Entry *sgl;
1362         unsigned int pae = 0;
1363
1364         if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4))
1365                 pae = 1;
1366
1367         if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
1368                 newcommand = &full_command_packet->command.newcommand;
1369                 newcommand->request_id__lunl =
1370                         cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id));
1371                 newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
1372                 newcommand->sg_list[0].length = cpu_to_le32(length);
1373                 newcommand->sgl_entries__lunh =
1374                         cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), 1));
1375         } else {
1376                 oldcommand = &full_command_packet->command.oldcommand;
1377                 oldcommand->request_id = request_id;
1378
1379                 if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
1380                         /* Load the sg list */
1381                         if (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)
1382                                 sgl = (TW_SG_Entry *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry)/4) + pae);
1383                         else
1384                                 sgl = (TW_SG_Entry *)((u32 *)oldcommand+TW_SGL_OUT(oldcommand->opcode__sgloffset));
1385                         sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
1386                         sgl->length = cpu_to_le32(length);
1387
1388                         oldcommand->size += pae;
1389                 }
1390         }
1391 } /* End twa_load_sgl() */
1392
1393 /* This function will perform a pci-dma mapping for a scatter gather list */
1394 static int twa_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)
1395 {
1396         int use_sg;
1397         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1398
1399         use_sg = scsi_dma_map(cmd);
1400         if (!use_sg)
1401                 return 0;
1402         else if (use_sg < 0) {
1403                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to map scatter gather list");
1404                 return 0;
1405         }
1406
1407         cmd->SCp.phase = TW_PHASE_SGLIST;
1408         cmd->SCp.have_data_in = use_sg;
1409
1410         return use_sg;
1411 } /* End twa_map_scsi_sg_data() */
1412
1413 /* This function will poll for a response interrupt of a request */
1414 static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
1415 {
1416         int retval = 1, found = 0, response_request_id;
1417         TW_Response_Queue response_queue;
1418         TW_Command_Full *full_command_packet = tw_dev->command_packet_virt[request_id];
1419
1420         if (twa_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, seconds) == 0) {
1421                 response_queue.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1422                 response_request_id = TW_RESID_OUT(response_queue.response_id);
1423                 if (request_id != response_request_id) {
1424                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "Found unexpected request id while polling for response");
1425                         goto out;
1426                 }
1427                 if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
1428                         if (full_command_packet->command.newcommand.status != 0) {
1429                                 /* bad response */
1430                                 twa_fill_sense(tw_dev, request_id, 0, 0);
1431                                 goto out;
1432                         }
1433                         found = 1;
1434                 } else {
1435                         if (full_command_packet->command.oldcommand.status != 0) {
1436                                 /* bad response */
1437                                 twa_fill_sense(tw_dev, request_id, 0, 0);
1438                                 goto out;
1439                         }
1440                         found = 1;
1441                 }
1442         }
1443
1444         if (found)
1445                 retval = 0;
1446 out:
1447         return retval;
1448 } /* End twa_poll_response() */
1449
1450 /* This function will poll the status register for a flag */
1451 static int twa_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
1452 {
1453         u32 status_reg_value;
1454         unsigned long before;
1455         int retval = 1;
1456
1457         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1458         before = jiffies;
1459
1460         if (twa_check_bits(status_reg_value))
1461                 twa_decode_bits(tw_dev, status_reg_value);
1462
1463         while ((status_reg_value & flag) != flag) {
1464                 status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1465
1466                 if (twa_check_bits(status_reg_value))
1467                         twa_decode_bits(tw_dev, status_reg_value);
1468
1469                 if (time_after(jiffies, before + HZ * seconds))
1470                         goto out;
1471
1472                 msleep(50);
1473         }
1474         retval = 0;
1475 out:
1476         return retval;
1477 } /* End twa_poll_status() */
1478
1479 /* This function will poll the status register for disappearance of a flag */
1480 static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
1481 {
1482         u32 status_reg_value;
1483         unsigned long before;
1484         int retval = 1;
1485
1486         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1487         before = jiffies;
1488
1489         if (twa_check_bits(status_reg_value))
1490                 twa_decode_bits(tw_dev, status_reg_value);
1491
1492         while ((status_reg_value & flag) != 0) {
1493                 status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1494                 if (twa_check_bits(status_reg_value))
1495                         twa_decode_bits(tw_dev, status_reg_value);
1496
1497                 if (time_after(jiffies, before + HZ * seconds))
1498                         goto out;
1499
1500                 msleep(50);
1501         }
1502         retval = 0;
1503 out:
1504         return retval;
1505 } /* End twa_poll_status_gone() */
1506
1507 /* This function will attempt to post a command packet to the board */
1508 static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal)
1509 {
1510         u32 status_reg_value;
1511         dma_addr_t command_que_value;
1512         int retval = 1;
1513
1514         command_que_value = tw_dev->command_packet_phys[request_id];
1515
1516         /* For 9650SE write low 4 bytes first */
1517         if ((tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
1518             (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)) {
1519                 command_que_value += TW_COMMAND_OFFSET;
1520                 writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR_LARGE(tw_dev));
1521         }
1522
1523         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1524
1525         if (twa_check_bits(status_reg_value))
1526                 twa_decode_bits(tw_dev, status_reg_value);
1527
1528         if (((tw_dev->pending_request_count > 0) && (tw_dev->state[request_id] != TW_S_PENDING)) || (status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL)) {
1529
1530                 /* Only pend internal driver commands */
1531                 if (!internal) {
1532                         retval = SCSI_MLQUEUE_HOST_BUSY;
1533                         goto out;
1534                 }
1535
1536                 /* Couldn't post the command packet, so we do it later */
1537                 if (tw_dev->state[request_id] != TW_S_PENDING) {
1538                         tw_dev->state[request_id] = TW_S_PENDING;
1539                         tw_dev->pending_request_count++;
1540                         if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
1541                                 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
1542                         }
1543                         tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
1544                         tw_dev->pending_tail = (tw_dev->pending_tail + 1) % TW_Q_LENGTH;
1545                 }
1546                 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
1547                 goto out;
1548         } else {
1549                 if ((tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
1550                     (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)) {
1551                         /* Now write upper 4 bytes */
1552                         writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR_LARGE(tw_dev) + 0x4);
1553                 } else {
1554                         if (sizeof(dma_addr_t) > 4) {
1555                                 command_que_value += TW_COMMAND_OFFSET;
1556                                 writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1557                                 writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR(tw_dev) + 0x4);
1558                         } else {
1559                                 writel(TW_COMMAND_OFFSET + command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1560                         }
1561                 }
1562                 tw_dev->state[request_id] = TW_S_POSTED;
1563                 tw_dev->posted_request_count++;
1564                 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
1565                         tw_dev->max_posted_request_count = tw_dev->posted_request_count;
1566                 }
1567         }
1568         retval = 0;
1569 out:
1570         return retval;
1571 } /* End twa_post_command_packet() */
1572
1573 /* This function will reset a device extension */
1574 static int twa_reset_device_extension(TW_Device_Extension *tw_dev)
1575 {
1576         int i = 0;
1577         int retval = 1;
1578         unsigned long flags = 0;
1579
1580         set_bit(TW_IN_RESET, &tw_dev->flags);
1581         TW_DISABLE_INTERRUPTS(tw_dev);
1582         TW_MASK_COMMAND_INTERRUPT(tw_dev);
1583         spin_lock_irqsave(tw_dev->host->host_lock, flags);
1584
1585         /* Abort all requests that are in progress */
1586         for (i = 0; i < TW_Q_LENGTH; i++) {
1587                 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1588                     (tw_dev->state[i] != TW_S_INITIAL) &&
1589                     (tw_dev->state[i] != TW_S_COMPLETED)) {
1590                         if (tw_dev->srb[i]) {
1591                                 tw_dev->srb[i]->result = (DID_RESET << 16);
1592                                 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
1593                                 twa_unmap_scsi_data(tw_dev, i);
1594                         }
1595                 }
1596         }
1597
1598         /* Reset queues and counts */
1599         for (i = 0; i < TW_Q_LENGTH; i++) {
1600                 tw_dev->free_queue[i] = i;
1601                 tw_dev->state[i] = TW_S_INITIAL;
1602         }
1603         tw_dev->free_head = TW_Q_START;
1604         tw_dev->free_tail = TW_Q_START;
1605         tw_dev->posted_request_count = 0;
1606         tw_dev->pending_request_count = 0;
1607         tw_dev->pending_head = TW_Q_START;
1608         tw_dev->pending_tail = TW_Q_START;
1609         tw_dev->reset_print = 0;
1610
1611         spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1612
1613         if (twa_reset_sequence(tw_dev, 1))
1614                 goto out;
1615
1616         TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1617         clear_bit(TW_IN_RESET, &tw_dev->flags);
1618         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1619
1620         retval = 0;
1621 out:
1622         return retval;
1623 } /* End twa_reset_device_extension() */
1624
1625 /* This function will reset a controller */
1626 static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
1627 {
1628         int tries = 0, retval = 1, flashed = 0, do_soft_reset = soft_reset;
1629
1630         while (tries < TW_MAX_RESET_TRIES) {
1631                 if (do_soft_reset) {
1632                         TW_SOFT_RESET(tw_dev);
1633                         /* Clear pchip/response queue on 9550SX */
1634                         if (twa_empty_response_queue_large(tw_dev)) {
1635                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x36, "Response queue (large) empty failed during reset sequence");
1636                                 do_soft_reset = 1;
1637                                 tries++;
1638                                 continue;
1639                         }
1640                 }
1641
1642                 /* Make sure controller is in a good state */
1643                 if (twa_poll_status(tw_dev, TW_STATUS_MICROCONTROLLER_READY | (do_soft_reset == 1 ? TW_STATUS_ATTENTION_INTERRUPT : 0), 60)) {
1644                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Microcontroller not ready during reset sequence");
1645                         do_soft_reset = 1;
1646                         tries++;
1647                         continue;
1648                 }
1649
1650                 /* Empty response queue */
1651                 if (twa_empty_response_queue(tw_dev)) {
1652                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Response queue empty failed during reset sequence");
1653                         do_soft_reset = 1;
1654                         tries++;
1655                         continue;
1656                 }
1657
1658                 flashed = 0;
1659
1660                 /* Check for compatibility/flash */
1661                 if (twa_check_srl(tw_dev, &flashed)) {
1662                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Compatibility check failed during reset sequence");
1663                         do_soft_reset = 1;
1664                         tries++;
1665                         continue;
1666                 } else {
1667                         if (flashed) {
1668                                 tries++;
1669                                 continue;
1670                         }
1671                 }
1672
1673                 /* Drain the AEN queue */
1674                 if (twa_aen_drain_queue(tw_dev, soft_reset)) {
1675                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x22, "AEN drain failed during reset sequence");
1676                         do_soft_reset = 1;
1677                         tries++;
1678                         continue;
1679                 }
1680
1681                 /* If we got here, controller is in a good state */
1682                 retval = 0;
1683                 goto out;
1684         }
1685 out:
1686         return retval;
1687 } /* End twa_reset_sequence() */
1688
1689 /* This funciton returns unit geometry in cylinders/heads/sectors */
1690 static int twa_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[])
1691 {
1692         int heads, sectors, cylinders;
1693         TW_Device_Extension *tw_dev;
1694
1695         tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1696
1697         if (capacity >= 0x200000) {
1698                 heads = 255;
1699                 sectors = 63;
1700                 cylinders = sector_div(capacity, heads * sectors);
1701         } else {
1702                 heads = 64;
1703                 sectors = 32;
1704                 cylinders = sector_div(capacity, heads * sectors);
1705         }
1706
1707         geom[0] = heads;
1708         geom[1] = sectors;
1709         geom[2] = cylinders;
1710
1711         return 0;
1712 } /* End twa_scsi_biosparam() */
1713
1714 /* This is the new scsi eh reset function */
1715 static int twa_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1716 {
1717         TW_Device_Extension *tw_dev = NULL;
1718         int retval = FAILED;
1719
1720         tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1721
1722         tw_dev->num_resets++;
1723
1724         sdev_printk(KERN_WARNING, SCpnt->device,
1725                 "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n",
1726                 TW_DRIVER, 0x2c, SCpnt->cmnd[0]);
1727
1728         /* Make sure we are not issuing an ioctl or resetting from ioctl */
1729         mutex_lock(&tw_dev->ioctl_lock);
1730
1731         /* Now reset the card and some of the device extension data */
1732         if (twa_reset_device_extension(tw_dev)) {
1733                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2b, "Controller reset failed during scsi host reset");
1734                 goto out;
1735         }
1736
1737         retval = SUCCESS;
1738 out:
1739         mutex_unlock(&tw_dev->ioctl_lock);
1740         return retval;
1741 } /* End twa_scsi_eh_reset() */
1742
1743 /* This is the main scsi queue function to handle scsi opcodes */
1744 static int twa_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1745 {
1746         int request_id, retval;
1747         TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1748
1749         /* If we are resetting due to timed out ioctl, report as busy */
1750         if (test_bit(TW_IN_RESET, &tw_dev->flags)) {
1751                 retval = SCSI_MLQUEUE_HOST_BUSY;
1752                 goto out;
1753         }
1754
1755         /* Check if this FW supports luns */
1756         if ((SCpnt->device->lun != 0) && (tw_dev->tw_compat_info.working_srl < TW_FW_SRL_LUNS_SUPPORTED)) {
1757                 SCpnt->result = (DID_BAD_TARGET << 16);
1758                 done(SCpnt);
1759                 retval = 0;
1760                 goto out;
1761         }
1762
1763         /* Save done function into scsi_cmnd struct */
1764         SCpnt->scsi_done = done;
1765
1766         /* Get a free request id */
1767         twa_get_request_id(tw_dev, &request_id);
1768
1769         /* Save the scsi command for use by the ISR */
1770         tw_dev->srb[request_id] = SCpnt;
1771
1772         /* Initialize phase to zero */
1773         SCpnt->SCp.phase = TW_PHASE_INITIAL;
1774
1775         retval = twa_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
1776         switch (retval) {
1777         case SCSI_MLQUEUE_HOST_BUSY:
1778                 twa_free_request_id(tw_dev, request_id);
1779                 break;
1780         case 1:
1781                 tw_dev->state[request_id] = TW_S_COMPLETED;
1782                 twa_free_request_id(tw_dev, request_id);
1783                 SCpnt->result = (DID_ERROR << 16);
1784                 done(SCpnt);
1785                 retval = 0;
1786         }
1787 out:
1788         return retval;
1789 } /* End twa_scsi_queue() */
1790
1791 /* This function hands scsi cdb's to the firmware */
1792 static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg)
1793 {
1794         TW_Command_Full *full_command_packet;
1795         TW_Command_Apache *command_packet;
1796         u32 num_sectors = 0x0;
1797         int i, sg_count;
1798         struct scsi_cmnd *srb = NULL;
1799         struct scatterlist *sglist = NULL, *sg;
1800         int retval = 1;
1801
1802         if (tw_dev->srb[request_id]) {
1803                 srb = tw_dev->srb[request_id];
1804                 if (scsi_sglist(srb))
1805                         sglist = scsi_sglist(srb);
1806         }
1807
1808         /* Initialize command packet */
1809         full_command_packet = tw_dev->command_packet_virt[request_id];
1810         full_command_packet->header.header_desc.size_header = 128;
1811         full_command_packet->header.status_block.error = 0;
1812         full_command_packet->header.status_block.severity__reserved = 0;
1813
1814         command_packet = &full_command_packet->command.newcommand;
1815         command_packet->status = 0;
1816         command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI);
1817
1818         /* We forced 16 byte cdb use earlier */
1819         if (!cdb)
1820                 memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN);
1821         else
1822                 memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN);
1823
1824         if (srb) {
1825                 command_packet->unit = srb->device->id;
1826                 command_packet->request_id__lunl =
1827                         cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id));
1828         } else {
1829                 command_packet->request_id__lunl =
1830                         cpu_to_le16(TW_REQ_LUN_IN(0, request_id));
1831                 command_packet->unit = 0;
1832         }
1833
1834         command_packet->sgl_offset = 16;
1835
1836         if (!sglistarg) {
1837                 /* Map sglist from scsi layer to cmd packet */
1838
1839                 if (scsi_sg_count(srb)) {
1840                         if ((scsi_sg_count(srb) == 1) &&
1841                             (scsi_bufflen(srb) < TW_MIN_SGL_LENGTH)) {
1842                                 if (srb->sc_data_direction == DMA_TO_DEVICE ||
1843                                     srb->sc_data_direction == DMA_BIDIRECTIONAL)
1844                                         scsi_sg_copy_to_buffer(srb,
1845                                                                tw_dev->generic_buffer_virt[request_id],
1846                                                                TW_SECTOR_SIZE);
1847                                 command_packet->sg_list[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
1848                                 command_packet->sg_list[0].length = cpu_to_le32(TW_MIN_SGL_LENGTH);
1849                         } else {
1850                                 sg_count = twa_map_scsi_sg_data(tw_dev, request_id);
1851                                 if (sg_count == 0)
1852                                         goto out;
1853
1854                                 scsi_for_each_sg(srb, sg, sg_count, i) {
1855                                         command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg));
1856                                         command_packet->sg_list[i].length = cpu_to_le32(sg_dma_len(sg));
1857                                         if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
1858                                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2e, "Found unaligned sgl address during execute scsi");
1859                                                 goto out;
1860                                         }
1861                                 }
1862                         }
1863                         command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id])));
1864                 }
1865         } else {
1866                 /* Internal cdb post */
1867                 for (i = 0; i < use_sg; i++) {
1868                         command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address);
1869                         command_packet->sg_list[i].length = cpu_to_le32(sglistarg[i].length);
1870                         if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
1871                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2f, "Found unaligned sgl address during internal post");
1872                                 goto out;
1873                         }
1874                 }
1875                 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg));
1876         }
1877
1878         if (srb) {
1879                 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6)
1880                         num_sectors = (u32)srb->cmnd[4];
1881
1882                 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10)
1883                         num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1884         }
1885
1886         /* Update sector statistic */
1887         tw_dev->sector_count = num_sectors;
1888         if (tw_dev->sector_count > tw_dev->max_sector_count)
1889                 tw_dev->max_sector_count = tw_dev->sector_count;
1890
1891         /* Update SG statistics */
1892         if (srb) {
1893                 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1894                 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1895                         tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1896         }
1897
1898         /* Now post the command to the board */
1899         if (srb) {
1900                 retval = twa_post_command_packet(tw_dev, request_id, 0);
1901         } else {
1902                 twa_post_command_packet(tw_dev, request_id, 1);
1903                 retval = 0;
1904         }
1905 out:
1906         return retval;
1907 } /* End twa_scsiop_execute_scsi() */
1908
1909 /* This function completes an execute scsi operation */
1910 static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id)
1911 {
1912         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1913
1914         if (scsi_bufflen(cmd) < TW_MIN_SGL_LENGTH &&
1915             (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1916              cmd->sc_data_direction == DMA_BIDIRECTIONAL)) {
1917                 if (scsi_sg_count(cmd) == 1) {
1918                         unsigned long flags;
1919                         void *buf = tw_dev->generic_buffer_virt[request_id];
1920
1921                         local_irq_save(flags);
1922                         scsi_sg_copy_from_buffer(cmd, buf, TW_SECTOR_SIZE);
1923                         local_irq_restore(flags);
1924                 }
1925         }
1926 } /* End twa_scsiop_execute_scsi_complete() */
1927
1928 /* This function tells the controller to shut down */
1929 static void __twa_shutdown(TW_Device_Extension *tw_dev)
1930 {
1931         /* Disable interrupts */
1932         TW_DISABLE_INTERRUPTS(tw_dev);
1933
1934         /* Free up the IRQ */
1935         free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
1936
1937         printk(KERN_WARNING "3w-9xxx: Shutting down host %d.\n", tw_dev->host->host_no);
1938
1939         /* Tell the card we are shutting down */
1940         if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
1941                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x31, "Connection shutdown failed");
1942         } else {
1943                 printk(KERN_WARNING "3w-9xxx: Shutdown complete.\n");
1944         }
1945
1946         /* Clear all interrupts just before exit */
1947         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1948 } /* End __twa_shutdown() */
1949
1950 /* Wrapper for __twa_shutdown */
1951 static void twa_shutdown(struct pci_dev *pdev)
1952 {
1953         struct Scsi_Host *host = pci_get_drvdata(pdev);
1954         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
1955
1956         __twa_shutdown(tw_dev);
1957 } /* End twa_shutdown() */
1958
1959 /* This function will look up a string */
1960 static char *twa_string_lookup(twa_message_type *table, unsigned int code)
1961 {
1962         int index;
1963
1964         for (index = 0; ((code != table[index].code) &&
1965                       (table[index].text != (char *)0)); index++);
1966         return(table[index].text);
1967 } /* End twa_string_lookup() */
1968
1969 /* This function will perform a pci-dma unmap */
1970 static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)
1971 {
1972         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1973
1974         scsi_dma_unmap(cmd);
1975 } /* End twa_unmap_scsi_data() */
1976
1977 /* scsi_host_template initializer */
1978 static struct scsi_host_template driver_template = {
1979         .module                 = THIS_MODULE,
1980         .name                   = "3ware 9000 Storage Controller",
1981         .queuecommand           = twa_scsi_queue,
1982         .eh_host_reset_handler  = twa_scsi_eh_reset,
1983         .bios_param             = twa_scsi_biosparam,
1984         .change_queue_depth     = twa_change_queue_depth,
1985         .can_queue              = TW_Q_LENGTH-2,
1986         .this_id                = -1,
1987         .sg_tablesize           = TW_APACHE_MAX_SGL_LENGTH,
1988         .max_sectors            = TW_MAX_SECTORS,
1989         .cmd_per_lun            = TW_MAX_CMDS_PER_LUN,
1990         .use_clustering         = ENABLE_CLUSTERING,
1991         .shost_attrs            = twa_host_attrs,
1992         .emulated               = 1
1993 };
1994
1995 /* This function will probe and initialize a card */
1996 static int __devinit twa_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
1997 {
1998         struct Scsi_Host *host = NULL;
1999         TW_Device_Extension *tw_dev;
2000         u32 mem_addr;
2001         int retval = -ENODEV;
2002
2003         retval = pci_enable_device(pdev);
2004         if (retval) {
2005                 TW_PRINTK(host, TW_DRIVER, 0x34, "Failed to enable pci device");
2006                 goto out_disable_device;
2007         }
2008
2009         pci_set_master(pdev);
2010         pci_try_set_mwi(pdev);
2011
2012         if (pci_set_dma_mask(pdev, DMA_64BIT_MASK)
2013             || pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))
2014                 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)
2015                     || pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)) {
2016                         TW_PRINTK(host, TW_DRIVER, 0x23, "Failed to set dma mask");
2017                         retval = -ENODEV;
2018                         goto out_disable_device;
2019                 }
2020
2021         host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2022         if (!host) {
2023                 TW_PRINTK(host, TW_DRIVER, 0x24, "Failed to allocate memory for device extension");
2024                 retval = -ENOMEM;
2025                 goto out_disable_device;
2026         }
2027         tw_dev = (TW_Device_Extension *)host->hostdata;
2028
2029         /* Save values to device extension */
2030         tw_dev->host = host;
2031         tw_dev->tw_pci_dev = pdev;
2032
2033         if (twa_initialize_device_extension(tw_dev)) {
2034                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x25, "Failed to initialize device extension");
2035                 goto out_free_device_extension;
2036         }
2037
2038         /* Request IO regions */
2039         retval = pci_request_regions(pdev, "3w-9xxx");
2040         if (retval) {
2041                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Failed to get mem region");
2042                 goto out_free_device_extension;
2043         }
2044
2045         if (pdev->device == PCI_DEVICE_ID_3WARE_9000)
2046                 mem_addr = pci_resource_start(pdev, 1);
2047         else
2048                 mem_addr = pci_resource_start(pdev, 2);
2049
2050         /* Save base address */
2051         tw_dev->base_addr = ioremap(mem_addr, PAGE_SIZE);
2052         if (!tw_dev->base_addr) {
2053                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x35, "Failed to ioremap");
2054                 goto out_release_mem_region;
2055         }
2056
2057         /* Disable interrupts on the card */
2058         TW_DISABLE_INTERRUPTS(tw_dev);
2059
2060         /* Initialize the card */
2061         if (twa_reset_sequence(tw_dev, 0))
2062                 goto out_iounmap;
2063
2064         /* Set host specific parameters */
2065         if ((pdev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
2066             (pdev->device == PCI_DEVICE_ID_3WARE_9690SA))
2067                 host->max_id = TW_MAX_UNITS_9650SE;
2068         else
2069                 host->max_id = TW_MAX_UNITS;
2070
2071         host->max_cmd_len = TW_MAX_CDB_LEN;
2072
2073         /* Channels aren't supported by adapter */
2074         host->max_lun = TW_MAX_LUNS(tw_dev->tw_compat_info.working_srl);
2075         host->max_channel = 0;
2076
2077         /* Register the card with the kernel SCSI layer */
2078         retval = scsi_add_host(host, &pdev->dev);
2079         if (retval) {
2080                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x27, "scsi add host failed");
2081                 goto out_iounmap;
2082         }
2083
2084         pci_set_drvdata(pdev, host);
2085
2086         printk(KERN_WARNING "3w-9xxx: scsi%d: Found a 3ware 9000 Storage Controller at 0x%x, IRQ: %d.\n",
2087                host->host_no, mem_addr, pdev->irq);
2088         printk(KERN_WARNING "3w-9xxx: scsi%d: Firmware %s, BIOS %s, Ports: %d.\n",
2089                host->host_no,
2090                (char *)twa_get_param(tw_dev, 0, TW_VERSION_TABLE,
2091                                      TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
2092                (char *)twa_get_param(tw_dev, 1, TW_VERSION_TABLE,
2093                                      TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
2094                le32_to_cpu(*(int *)twa_get_param(tw_dev, 2, TW_INFORMATION_TABLE,
2095                                      TW_PARAM_PORTCOUNT, TW_PARAM_PORTCOUNT_LENGTH)));
2096
2097         /* Now setup the interrupt handler */
2098         retval = request_irq(pdev->irq, twa_interrupt, IRQF_SHARED, "3w-9xxx", tw_dev);
2099         if (retval) {
2100                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x30, "Error requesting IRQ");
2101                 goto out_remove_host;
2102         }
2103
2104         twa_device_extension_list[twa_device_extension_count] = tw_dev;
2105         twa_device_extension_count++;
2106
2107         /* Re-enable interrupts on the card */
2108         TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2109
2110         /* Finally, scan the host */
2111         scsi_scan_host(host);
2112
2113         if (twa_major == -1) {
2114                 if ((twa_major = register_chrdev (0, "twa", &twa_fops)) < 0)
2115                         TW_PRINTK(host, TW_DRIVER, 0x29, "Failed to register character device");
2116         }
2117         return 0;
2118
2119 out_remove_host:
2120         scsi_remove_host(host);
2121 out_iounmap:
2122         iounmap(tw_dev->base_addr);
2123 out_release_mem_region:
2124         pci_release_regions(pdev);
2125 out_free_device_extension:
2126         twa_free_device_extension(tw_dev);
2127         scsi_host_put(host);
2128 out_disable_device:
2129         pci_disable_device(pdev);
2130
2131         return retval;
2132 } /* End twa_probe() */
2133
2134 /* This function is called to remove a device */
2135 static void twa_remove(struct pci_dev *pdev)
2136 {
2137         struct Scsi_Host *host = pci_get_drvdata(pdev);
2138         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2139
2140         scsi_remove_host(tw_dev->host);
2141
2142         /* Unregister character device */
2143         if (twa_major >= 0) {
2144                 unregister_chrdev(twa_major, "twa");
2145                 twa_major = -1;
2146         }
2147
2148         /* Shutdown the card */
2149         __twa_shutdown(tw_dev);
2150
2151         /* Free IO remapping */
2152         iounmap(tw_dev->base_addr);
2153
2154         /* Free up the mem region */
2155         pci_release_regions(pdev);
2156
2157         /* Free up device extension resources */
2158         twa_free_device_extension(tw_dev);
2159
2160         scsi_host_put(tw_dev->host);
2161         pci_disable_device(pdev);
2162         twa_device_extension_count--;
2163 } /* End twa_remove() */
2164
2165 /* PCI Devices supported by this driver */
2166 static struct pci_device_id twa_pci_tbl[] __devinitdata = {
2167         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9000,
2168           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2169         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9550SX,
2170           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2171         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9650SE,
2172           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2173         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9690SA,
2174           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2175         { }
2176 };
2177 MODULE_DEVICE_TABLE(pci, twa_pci_tbl);
2178
2179 /* pci_driver initializer */
2180 static struct pci_driver twa_driver = {
2181         .name           = "3w-9xxx",
2182         .id_table       = twa_pci_tbl,
2183         .probe          = twa_probe,
2184         .remove         = twa_remove,
2185         .shutdown       = twa_shutdown
2186 };
2187
2188 /* This function is called on driver initialization */
2189 static int __init twa_init(void)
2190 {
2191         printk(KERN_WARNING "3ware 9000 Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2192
2193         return pci_register_driver(&twa_driver);
2194 } /* End twa_init() */
2195
2196 /* This function is called on driver exit */
2197 static void __exit twa_exit(void)
2198 {
2199         pci_unregister_driver(&twa_driver);
2200 } /* End twa_exit() */
2201
2202 module_init(twa_init);
2203 module_exit(twa_exit);
2204