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   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) 2004-2009 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    2.26.02.011 - Increase max AENs drained to 256.
  75                  Add MSI support and "use_msi" module parameter.
  76                  Fix bug in twa_get_param() on 4GB+.
  77                  Use pci_resource_len() for ioremap().
  78    2.26.02.012 - Add power management support.
  79 */
  80
  81 #include <linux/module.h>
  82 #include <linux/reboot.h>
  83 #include <linux/spinlock.h>
  84 #include <linux/interrupt.h>
  85 #include <linux/moduleparam.h>
  86 #include <linux/errno.h>
  87 #include <linux/types.h>
  88 #include <linux/delay.h>
  89 #include <linux/pci.h>
  90 #include <linux/time.h>
  91 #include <linux/mutex.h>
  92 #include <linux/smp_lock.h>
  93 #include <asm/io.h>
  94 #include <asm/irq.h>
  95 #include <asm/uaccess.h>
  96 #include <scsi/scsi.h>
  97 #include <scsi/scsi_host.h>
  98 #include <scsi/scsi_tcq.h>
  99 #include <scsi/scsi_cmnd.h>
 100 #include "3w-9xxx.h"
 101
 102 /* Globals */
 103 #define TW_DRIVER_VERSION "2.26.02.012"
 104 static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT];
 105 static unsigned int twa_device_extension_count;
 106 static int twa_major = -1;
 107 extern struct timezone sys_tz;
 108
 109 /* Module parameters */
 110 MODULE_AUTHOR ("AMCC");
 111 MODULE_DESCRIPTION ("3ware 9000 Storage Controller Linux Driver");
 112 MODULE_LICENSE("GPL");
 113 MODULE_VERSION(TW_DRIVER_VERSION);
 114
 115 static int use_msi = 0;
 116 module_param(use_msi, int, S_IRUGO);
 117 MODULE_PARM_DESC(use_msi, "Use Message Signaled Interrupts.  Default: 0");
 118
 119 /* Function prototypes */
 120 static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header);
 121 static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id);
 122 static char *twa_aen_severity_lookup(unsigned char severity_code);
 123 static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id);
 124 static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
 125 static int twa_chrdev_open(struct inode *inode, struct file *file);
 126 static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host);
 127 static void twa_free_request_id(TW_Device_Extension *tw_dev,int request_id);
 128 static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id);
 129 static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
 130                               u32 set_features, unsigned short current_fw_srl,
 131                               unsigned short current_fw_arch_id,
 132                               unsigned short current_fw_branch,
 133                               unsigned short current_fw_build,
 134                               unsigned short *fw_on_ctlr_srl,
 135                               unsigned short *fw_on_ctlr_arch_id,
 136                               unsigned short *fw_on_ctlr_branch,
 137                               unsigned short *fw_on_ctlr_build,
 138                               u32 *init_connect_result);
 139 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);
 140 static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds);
 141 static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds);
 142 static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal);
 143 static int twa_reset_device_extension(TW_Device_Extension *tw_dev);
 144 static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset);
 145 static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg);
 146 static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id);
 147 static char *twa_string_lookup(twa_message_type *table, unsigned int aen_code);
 148 static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id);
 149
 150 /* Functions */
 151
 152 /* Show some statistics about the card */
 153 static ssize_t twa_show_stats(struct device *dev,
 154                               struct device_attribute *attr, char *buf)
 155 {
 156         struct Scsi_Host *host = class_to_shost(dev);
 157         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
 158         unsigned long flags = 0;
 159         ssize_t len;
 160
 161         spin_lock_irqsave(tw_dev->host->host_lock, flags);
 162         len = snprintf(buf, PAGE_SIZE, "3w-9xxx Driver version: %s\n"
 163                        "Current commands posted:   %4d\n"
 164                        "Max commands posted:       %4d\n"
 165                        "Current pending commands:  %4d\n"
 166                        "Max pending commands:      %4d\n"
 167                        "Last sgl length:           %4d\n"
 168                        "Max sgl length:            %4d\n"
 169                        "Last sector count:         %4d\n"
 170                        "Max sector count:          %4d\n"
 171                        "SCSI Host Resets:          %4d\n"
 172                        "AEN's:                     %4d\n",
 173                        TW_DRIVER_VERSION,
 174                        tw_dev->posted_request_count,
 175                        tw_dev->max_posted_request_count,
 176                        tw_dev->pending_request_count,
 177                        tw_dev->max_pending_request_count,
 178                        tw_dev->sgl_entries,
 179                        tw_dev->max_sgl_entries,
 180                        tw_dev->sector_count,
 181                        tw_dev->max_sector_count,
 182                        tw_dev->num_resets,
 183                        tw_dev->aen_count);
 184         spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 185         return len;
 186 } /* End twa_show_stats() */
 187
 188 /* This function will set a devices queue depth */
 189 static int twa_change_queue_depth(struct scsi_device *sdev, int queue_depth)
 190 {
 191         if (queue_depth > TW_Q_LENGTH-2)
 192                 queue_depth = TW_Q_LENGTH-2;
 193         scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
 194         return queue_depth;
 195 } /* End twa_change_queue_depth() */
 196
 197 /* Create sysfs 'stats' entry */
 198 static struct device_attribute twa_host_stats_attr = {
 199         .attr = {
 200                 .name =         "stats",
 201                 .mode =         S_IRUGO,
 202         },
 203         .show = twa_show_stats
 204 };
 205
 206 /* Host attributes initializer */
 207 static struct device_attribute *twa_host_attrs[] = {
 208         &twa_host_stats_attr,
 209         NULL,
 210 };
 211
 212 /* File operations struct for character device */
 213 static const struct file_operations twa_fops = {
 214         .owner          = THIS_MODULE,
 215         .ioctl          = twa_chrdev_ioctl,
 216         .open           = twa_chrdev_open,
 217         .release        = NULL
 218 };
 219
 220 /* This function will complete an aen request from the isr */
 221 static int twa_aen_complete(TW_Device_Extension *tw_dev, int request_id)
 222 {
 223         TW_Command_Full *full_command_packet;
 224         TW_Command *command_packet;
 225         TW_Command_Apache_Header *header;
 226         unsigned short aen;
 227         int retval = 1;
 228
 229         header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
 230         tw_dev->posted_request_count--;
 231         aen = le16_to_cpu(header->status_block.error);
 232         full_command_packet = tw_dev->command_packet_virt[request_id];
 233         command_packet = &full_command_packet->command.oldcommand;
 234
 235         /* First check for internal completion of set param for time sync */
 236         if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) {
 237                 /* Keep reading the queue in case there are more aen's */
 238                 if (twa_aen_read_queue(tw_dev, request_id))
 239                         goto out2;
 240                 else {
 241                         retval = 0;
 242                         goto out;
 243                 }
 244         }
 245
 246         switch (aen) {
 247         case TW_AEN_QUEUE_EMPTY:
 248                 /* Quit reading the queue if this is the last one */
 249                 break;
 250         case TW_AEN_SYNC_TIME_WITH_HOST:
 251                 twa_aen_sync_time(tw_dev, request_id);
 252                 retval = 0;
 253                 goto out;
 254         default:
 255                 twa_aen_queue_event(tw_dev, header);
 256
 257                 /* If there are more aen's, keep reading the queue */
 258                 if (twa_aen_read_queue(tw_dev, request_id))
 259                         goto out2;
 260                 else {
 261                         retval = 0;
 262                         goto out;
 263                 }
 264         }
 265         retval = 0;
 266 out2:
 267         tw_dev->state[request_id] = TW_S_COMPLETED;
 268         twa_free_request_id(tw_dev, request_id);
 269         clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
 270 out:
 271         return retval;
 272 } /* End twa_aen_complete() */
 273
 274 /* This function will drain aen queue */
 275 static int twa_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
 276 {
 277         int request_id = 0;
 278         char cdb[TW_MAX_CDB_LEN];
 279         TW_SG_Entry sglist[1];
 280         int finished = 0, count = 0;
 281         TW_Command_Full *full_command_packet;
 282         TW_Command_Apache_Header *header;
 283         unsigned short aen;
 284         int first_reset = 0, queue = 0, retval = 1;
 285
 286         if (no_check_reset)
 287                 first_reset = 0;
 288         else
 289                 first_reset = 1;
 290
 291         full_command_packet = tw_dev->command_packet_virt[request_id];
 292         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 293
 294         /* Initialize cdb */
 295         memset(&cdb, 0, TW_MAX_CDB_LEN);
 296         cdb[0] = REQUEST_SENSE; /* opcode */
 297         cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
 298
 299         /* Initialize sglist */
 300         memset(&sglist, 0, sizeof(TW_SG_Entry));
 301         sglist[0].length = TW_SECTOR_SIZE;
 302         sglist[0].address = tw_dev->generic_buffer_phys[request_id];
 303
 304         if (sglist[0].address & TW_ALIGNMENT_9000_SGL) {
 305                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Found unaligned address during AEN drain");
 306                 goto out;
 307         }
 308
 309         /* Mark internal command */
 310         tw_dev->srb[request_id] = NULL;
 311
 312         do {
 313                 /* Send command to the board */
 314                 if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
 315                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Error posting request sense");
 316                         goto out;
 317                 }
 318
 319                 /* Now poll for completion */
 320                 if (twa_poll_response(tw_dev, request_id, 30)) {
 321                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "No valid response while draining AEN queue");
 322                         tw_dev->posted_request_count--;
 323                         goto out;
 324                 }
 325
 326                 tw_dev->posted_request_count--;
 327                 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
 328                 aen = le16_to_cpu(header->status_block.error);
 329                 queue = 0;
 330                 count++;
 331
 332                 switch (aen) {
 333                 case TW_AEN_QUEUE_EMPTY:
 334                         if (first_reset != 1)
 335                                 goto out;
 336                         else
 337                                 finished = 1;
 338                         break;
 339                 case TW_AEN_SOFT_RESET:
 340                         if (first_reset == 0)
 341                                 first_reset = 1;
 342                         else
 343                                 queue = 1;
 344                         break;
 345                 case TW_AEN_SYNC_TIME_WITH_HOST:
 346                         break;
 347                 default:
 348                         queue = 1;
 349                 }
 350
 351                 /* Now queue an event info */
 352                 if (queue)
 353                         twa_aen_queue_event(tw_dev, header);
 354         } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN));
 355
 356         if (count == TW_MAX_AEN_DRAIN)
 357                 goto out;
 358
 359         retval = 0;
 360 out:
 361         tw_dev->state[request_id] = TW_S_INITIAL;
 362         return retval;
 363 } /* End twa_aen_drain_queue() */
 364
 365 /* This function will queue an event */
 366 static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
 367 {
 368         u32 local_time;
 369         struct timeval time;
 370         TW_Event *event;
 371         unsigned short aen;
 372         char host[16];
 373         char *error_str;
 374
 375         tw_dev->aen_count++;
 376
 377         /* Fill out event info */
 378         event = tw_dev->event_queue[tw_dev->error_index];
 379
 380         /* Check for clobber */
 381         host[0] = '\0';
 382         if (tw_dev->host) {
 383                 sprintf(host, " scsi%d:", tw_dev->host->host_no);
 384                 if (event->retrieved == TW_AEN_NOT_RETRIEVED)
 385                         tw_dev->aen_clobber = 1;
 386         }
 387
 388         aen = le16_to_cpu(header->status_block.error);
 389         memset(event, 0, sizeof(TW_Event));
 390
 391         event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
 392         do_gettimeofday(&time);
 393         local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60));
 394         event->time_stamp_sec = local_time;
 395         event->aen_code = aen;
 396         event->retrieved = TW_AEN_NOT_RETRIEVED;
 397         event->sequence_id = tw_dev->error_sequence_id;
 398         tw_dev->error_sequence_id++;
 399
 400         /* Check for embedded error string */
 401         error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]);
 402
 403         header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0';
 404         event->parameter_len = strlen(header->err_specific_desc);
 405         memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + (error_str[0] == '\0' ? 0 : (1 + strlen(error_str))));
 406         if (event->severity != TW_AEN_SEVERITY_DEBUG)
 407                 printk(KERN_WARNING "3w-9xxx:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
 408                        host,
 409                        twa_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
 410                        TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen,
 411                        error_str[0] == '\0' ? twa_string_lookup(twa_aen_table, aen) : error_str,
 412                        header->err_specific_desc);
 413         else
 414                 tw_dev->aen_count--;
 415
 416         if ((tw_dev->error_index + 1) == TW_Q_LENGTH)
 417                 tw_dev->event_queue_wrapped = 1;
 418         tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
 419 } /* End twa_aen_queue_event() */
 420
 421 /* This function will read the aen queue from the isr */
 422 static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
 423 {
 424         char cdb[TW_MAX_CDB_LEN];
 425         TW_SG_Entry sglist[1];
 426         TW_Command_Full *full_command_packet;
 427         int retval = 1;
 428
 429         full_command_packet = tw_dev->command_packet_virt[request_id];
 430         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 431
 432         /* Initialize cdb */
 433         memset(&cdb, 0, TW_MAX_CDB_LEN);
 434         cdb[0] = REQUEST_SENSE; /* opcode */
 435         cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
 436
 437         /* Initialize sglist */
 438         memset(&sglist, 0, sizeof(TW_SG_Entry));
 439         sglist[0].length = TW_SECTOR_SIZE;
 440         sglist[0].address = tw_dev->generic_buffer_phys[request_id];
 441
 442         /* Mark internal command */
 443         tw_dev->srb[request_id] = NULL;
 444
 445         /* Now post the command packet */
 446         if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
 447                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "Post failed while reading AEN queue");
 448                 goto out;
 449         }
 450         retval = 0;
 451 out:
 452         return retval;
 453 } /* End twa_aen_read_queue() */
 454
 455 /* This function will look up an AEN severity string */
 456 static char *twa_aen_severity_lookup(unsigned char severity_code)
 457 {
 458         char *retval = NULL;
 459
 460         if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) ||
 461             (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG))
 462                 goto out;
 463
 464         retval = twa_aen_severity_table[severity_code];
 465 out:
 466         return retval;
 467 } /* End twa_aen_severity_lookup() */
 468
 469 /* This function will sync firmware time with the host time */
 470 static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
 471 {
 472         u32 schedulertime;
 473         struct timeval utc;
 474         TW_Command_Full *full_command_packet;
 475         TW_Command *command_packet;
 476         TW_Param_Apache *param;
 477         u32 local_time;
 478
 479         /* Fill out the command packet */
 480         full_command_packet = tw_dev->command_packet_virt[request_id];
 481         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 482         command_packet = &full_command_packet->command.oldcommand;
 483         command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
 484         command_packet->request_id = request_id;
 485         command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
 486         command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
 487         command_packet->size = TW_COMMAND_SIZE;
 488         command_packet->byte6_offset.parameter_count = cpu_to_le16(1);
 489
 490         /* Setup the param */
 491         param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
 492         memset(param, 0, TW_SECTOR_SIZE);
 493         param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */
 494         param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
 495         param->parameter_size_bytes = cpu_to_le16(4);
 496
 497         /* Convert system time in UTC to local time seconds since last
 498            Sunday 12:00AM */
 499         do_gettimeofday(&utc);
 500         local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
 501         schedulertime = local_time - (3 * 86400);
 502         schedulertime = cpu_to_le32(schedulertime % 604800);
 503
 504         memcpy(param->data, &schedulertime, sizeof(u32));
 505
 506         /* Mark internal command */
 507         tw_dev->srb[request_id] = NULL;
 508
 509         /* Now post the command */
 510         twa_post_command_packet(tw_dev, request_id, 1);
 511 } /* End twa_aen_sync_time() */
 512
 513 /* This function will allocate memory and check if it is correctly aligned */
 514 static int twa_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
 515 {
 516         int i;
 517         dma_addr_t dma_handle;
 518         unsigned long *cpu_addr;
 519         int retval = 1;
 520
 521         cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
 522         if (!cpu_addr) {
 523                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
 524                 goto out;
 525         }
 526
 527         if ((unsigned long)cpu_addr % (TW_ALIGNMENT_9000)) {
 528                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x6, "Failed to allocate correctly aligned memory");
 529                 pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
 530                 goto out;
 531         }
 532
 533         memset(cpu_addr, 0, size*TW_Q_LENGTH);
 534
 535         for (i = 0; i < TW_Q_LENGTH; i++) {
 536                 switch(which) {
 537                 case 0:
 538                         tw_dev->command_packet_phys[i] = dma_handle+(i*size);
 539                         tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size));
 540                         break;
 541                 case 1:
 542                         tw_dev->generic_buffer_phys[i] = dma_handle+(i*size);
 543                         tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
 544                         break;
 545                 }
 546         }
 547         retval = 0;
 548 out:
 549         return retval;
 550 } /* End twa_allocate_memory() */
 551
 552 /* This function will check the status register for unexpected bits */
 553 static int twa_check_bits(u32 status_reg_value)
 554 {
 555         int retval = 1;
 556
 557         if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS)
 558                 goto out;
 559         if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0)
 560                 goto out;
 561
 562         retval = 0;
 563 out:
 564         return retval;
 565 } /* End twa_check_bits() */
 566
 567 /* This function will check the srl and decide if we are compatible  */
 568 static int twa_check_srl(TW_Device_Extension *tw_dev, int *flashed)
 569 {
 570         int retval = 1;
 571         unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0;
 572         unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0;
 573         u32 init_connect_result = 0;
 574
 575         if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
 576                                TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
 577                                TW_9000_ARCH_ID, TW_CURRENT_DRIVER_BRANCH,
 578                                TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl,
 579                                &fw_on_ctlr_arch_id, &fw_on_ctlr_branch,
 580                                &fw_on_ctlr_build, &init_connect_result)) {
 581                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "Initconnection failed while checking SRL");
 582                 goto out;
 583         }
 584
 585         tw_dev->tw_compat_info.working_srl = fw_on_ctlr_srl;
 586         tw_dev->tw_compat_info.working_branch = fw_on_ctlr_branch;
 587         tw_dev->tw_compat_info.working_build = fw_on_ctlr_build;
 588
 589         /* Try base mode compatibility */
 590         if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
 591                 if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
 592                                        TW_EXTENDED_INIT_CONNECT,
 593                                        TW_BASE_FW_SRL, TW_9000_ARCH_ID,
 594                                        TW_BASE_FW_BRANCH, TW_BASE_FW_BUILD,
 595                                        &fw_on_ctlr_srl, &fw_on_ctlr_arch_id,
 596                                        &fw_on_ctlr_branch, &fw_on_ctlr_build,
 597                                        &init_connect_result)) {
 598                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Initconnection (base mode) failed while checking SRL");
 599                         goto out;
 600                 }
 601                 if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
 602                         if (TW_CURRENT_DRIVER_SRL > fw_on_ctlr_srl) {
 603                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x32, "Firmware and driver incompatibility: please upgrade firmware");
 604                         } else {
 605                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x33, "Firmware and driver incompatibility: please upgrade driver");
 606                         }
 607                         goto out;
 608                 }
 609                 tw_dev->tw_compat_info.working_srl = TW_BASE_FW_SRL;
 610                 tw_dev->tw_compat_info.working_branch = TW_BASE_FW_BRANCH;
 611                 tw_dev->tw_compat_info.working_build = TW_BASE_FW_BUILD;
 612         }
 613
 614         /* Load rest of compatibility struct */
 615         strncpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION));
 616         tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL;
 617         tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH;
 618         tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD;
 619         tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL;
 620         tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH;
 621         tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD;
 622         tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl;
 623         tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch;
 624         tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build;
 625
 626         retval = 0;
 627 out:
 628         return retval;
 629 } /* End twa_check_srl() */
 630
 631 /* This function handles ioctl for the character device */
 632 static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 633 {
 634         long timeout;
 635         unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
 636         dma_addr_t dma_handle;
 637         int request_id = 0;
 638         unsigned int sequence_id = 0;
 639         unsigned char event_index, start_index;
 640         TW_Ioctl_Driver_Command driver_command;
 641         TW_Ioctl_Buf_Apache *tw_ioctl;
 642         TW_Lock *tw_lock;
 643         TW_Command_Full *full_command_packet;
 644         TW_Compatibility_Info *tw_compat_info;
 645         TW_Event *event;
 646         struct timeval current_time;
 647         u32 current_time_ms;
 648         TW_Device_Extension *tw_dev = twa_device_extension_list[iminor(inode)];
 649         int retval = TW_IOCTL_ERROR_OS_EFAULT;
 650         void __user *argp = (void __user *)arg;
 651
 652         /* Only let one of these through at a time */
 653         if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
 654                 retval = TW_IOCTL_ERROR_OS_EINTR;
 655                 goto out;
 656         }
 657
 658         /* First copy down the driver command */
 659         if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command)))
 660                 goto out2;
 661
 662         /* Check data buffer size */
 663         if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) {
 664                 retval = TW_IOCTL_ERROR_OS_EINVAL;
 665                 goto out2;
 666         }
 667
 668         /* Hardware can only do multiple of 512 byte transfers */
 669         data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511;
 670
 671         /* Now allocate ioctl buf memory */
 672         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);
 673         if (!cpu_addr) {
 674                 retval = TW_IOCTL_ERROR_OS_ENOMEM;
 675                 goto out2;
 676         }
 677
 678         tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
 679
 680         /* Now copy down the entire ioctl */
 681         if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1))
 682                 goto out3;
 683
 684         /* See which ioctl we are doing */
 685         switch (cmd) {
 686         case TW_IOCTL_FIRMWARE_PASS_THROUGH:
 687                 spin_lock_irqsave(tw_dev->host->host_lock, flags);
 688                 twa_get_request_id(tw_dev, &request_id);
 689
 690                 /* Flag internal command */
 691                 tw_dev->srb[request_id] = NULL;
 692
 693                 /* Flag chrdev ioctl */
 694                 tw_dev->chrdev_request_id = request_id;
 695
 696                 full_command_packet = &tw_ioctl->firmware_command;
 697
 698                 /* Load request id and sglist for both command types */
 699                 twa_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted);
 700
 701                 memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full));
 702
 703                 /* Now post the command packet to the controller */
 704                 twa_post_command_packet(tw_dev, request_id, 1);
 705                 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 706
 707                 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
 708
 709                 /* Now wait for command to complete */
 710                 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
 711
 712                 /* We timed out, and didn't get an interrupt */
 713                 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
 714                         /* Now we need to reset the board */
 715                         printk(KERN_WARNING "3w-9xxx: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
 716                                tw_dev->host->host_no, TW_DRIVER, 0x37,
 717                                cmd);
 718                         retval = TW_IOCTL_ERROR_OS_EIO;
 719                         twa_reset_device_extension(tw_dev);
 720                         goto out3;
 721                 }
 722
 723                 /* Now copy in the command packet response */
 724                 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full));
 725
 726                 /* Now complete the io */
 727                 spin_lock_irqsave(tw_dev->host->host_lock, flags);
 728                 tw_dev->posted_request_count--;
 729                 tw_dev->state[request_id] = TW_S_COMPLETED;
 730                 twa_free_request_id(tw_dev, request_id);
 731                 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 732                 break;
 733         case TW_IOCTL_GET_COMPATIBILITY_INFO:
 734                 tw_ioctl->driver_command.status = 0;
 735                 /* Copy compatiblity struct into ioctl data buffer */
 736                 tw_compat_info = (TW_Compatibility_Info *)tw_ioctl->data_buffer;
 737                 memcpy(tw_compat_info, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info));
 738                 break;
 739         case TW_IOCTL_GET_LAST_EVENT:
 740                 if (tw_dev->event_queue_wrapped) {
 741                         if (tw_dev->aen_clobber) {
 742                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 743                                 tw_dev->aen_clobber = 0;
 744                         } else
 745                                 tw_ioctl->driver_command.status = 0;
 746                 } else {
 747                         if (!tw_dev->error_index) {
 748                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 749                                 break;
 750                         }
 751                         tw_ioctl->driver_command.status = 0;
 752                 }
 753                 event_index = (tw_dev->error_index - 1 + TW_Q_LENGTH) % TW_Q_LENGTH;
 754                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 755                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 756                 break;
 757         case TW_IOCTL_GET_FIRST_EVENT:
 758                 if (tw_dev->event_queue_wrapped) {
 759                         if (tw_dev->aen_clobber) {
 760                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 761                                 tw_dev->aen_clobber = 0;
 762                         } else
 763                                 tw_ioctl->driver_command.status = 0;
 764                         event_index = tw_dev->error_index;
 765                 } else {
 766                         if (!tw_dev->error_index) {
 767                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 768                                 break;
 769                         }
 770                         tw_ioctl->driver_command.status = 0;
 771                         event_index = 0;
 772                 }
 773                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 774                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 775                 break;
 776         case TW_IOCTL_GET_NEXT_EVENT:
 777                 event = (TW_Event *)tw_ioctl->data_buffer;
 778                 sequence_id = event->sequence_id;
 779                 tw_ioctl->driver_command.status = 0;
 780
 781                 if (tw_dev->event_queue_wrapped) {
 782                         if (tw_dev->aen_clobber) {
 783                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 784                                 tw_dev->aen_clobber = 0;
 785                         }
 786                         start_index = tw_dev->error_index;
 787                 } else {
 788                         if (!tw_dev->error_index) {
 789                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 790                                 break;
 791                         }
 792                         start_index = 0;
 793                 }
 794                 event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id + 1) % TW_Q_LENGTH;
 795
 796                 if (!(tw_dev->event_queue[event_index]->sequence_id > sequence_id)) {
 797                         if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
 798                                 tw_dev->aen_clobber = 1;
 799                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 800                         break;
 801                 }
 802                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 803                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 804                 break;
 805         case TW_IOCTL_GET_PREVIOUS_EVENT:
 806                 event = (TW_Event *)tw_ioctl->data_buffer;
 807                 sequence_id = event->sequence_id;
 808                 tw_ioctl->driver_command.status = 0;
 809
 810                 if (tw_dev->event_queue_wrapped) {
 811                         if (tw_dev->aen_clobber) {
 812                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 813                                 tw_dev->aen_clobber = 0;
 814                         }
 815                         start_index = tw_dev->error_index;
 816                 } else {
 817                         if (!tw_dev->error_index) {
 818                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 819                                 break;
 820                         }
 821                         start_index = 0;
 822                 }
 823                 event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id - 1) % TW_Q_LENGTH;
 824
 825                 if (!(tw_dev->event_queue[event_index]->sequence_id < sequence_id)) {
 826                         if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
 827                                 tw_dev->aen_clobber = 1;
 828                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 829                         break;
 830                 }
 831                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 832                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 833                 break;
 834         case TW_IOCTL_GET_LOCK:
 835                 tw_lock = (TW_Lock *)tw_ioctl->data_buffer;
 836                 do_gettimeofday(&current_time);
 837                 current_time_ms = (current_time.tv_sec * 1000) + (current_time.tv_usec / 1000);
 838
 839                 if ((tw_lock->force_flag == 1) || (tw_dev->ioctl_sem_lock == 0) || (current_time_ms >= tw_dev->ioctl_msec)) {
 840                         tw_dev->ioctl_sem_lock = 1;
 841                         tw_dev->ioctl_msec = current_time_ms + tw_lock->timeout_msec;
 842                         tw_ioctl->driver_command.status = 0;
 843                         tw_lock->time_remaining_msec = tw_lock->timeout_msec;
 844                 } else {
 845                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_LOCKED;
 846                         tw_lock->time_remaining_msec = tw_dev->ioctl_msec - current_time_ms;
 847                 }
 848                 break;
 849         case TW_IOCTL_RELEASE_LOCK:
 850                 if (tw_dev->ioctl_sem_lock == 1) {
 851                         tw_dev->ioctl_sem_lock = 0;
 852                         tw_ioctl->driver_command.status = 0;
 853                 } else {
 854                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NOT_LOCKED;
 855                 }
 856                 break;
 857         default:
 858                 retval = TW_IOCTL_ERROR_OS_ENOTTY;
 859                 goto out3;
 860         }
 861
 862         /* Now copy the entire response to userspace */
 863         if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0)
 864                 retval = 0;
 865 out3:
 866         /* Now free ioctl buf memory */
 867         dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle);
 868 out2:
 869         mutex_unlock(&tw_dev->ioctl_lock);
 870 out:
 871         return retval;
 872 } /* End twa_chrdev_ioctl() */
 873
 874 /* This function handles open for the character device */
 875 /* NOTE that this function will race with remove. */
 876 static int twa_chrdev_open(struct inode *inode, struct file *file)
 877 {
 878         unsigned int minor_number;
 879         int retval = TW_IOCTL_ERROR_OS_ENODEV;
 880
 881         cycle_kernel_lock();
 882         minor_number = iminor(inode);
 883         if (minor_number >= twa_device_extension_count)
 884                 goto out;
 885         retval = 0;
 886 out:
 887         return retval;
 888 } /* End twa_chrdev_open() */
 889
 890 /* This function will print readable messages from status register errors */
 891 static int twa_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value)
 892 {
 893         int retval = 1;
 894
 895         /* Check for various error conditions and handle them appropriately */
 896         if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
 897                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "PCI Parity Error: clearing");
 898                 writel(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
 899         }
 900
 901         if (status_reg_value & TW_STATUS_PCI_ABORT) {
 902                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "PCI Abort: clearing");
 903                 writel(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
 904                 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
 905         }
 906
 907         if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
 908                 if (((tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9650SE) &&
 909                      (tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9690SA)) ||
 910                     (!test_bit(TW_IN_RESET, &tw_dev->flags)))
 911                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Controller Queue Error: clearing");
 912                 writel(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
 913         }
 914
 915         if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
 916                 if (tw_dev->reset_print == 0) {
 917                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Microcontroller Error: clearing");
 918                         tw_dev->reset_print = 1;
 919                 }
 920                 goto out;
 921         }
 922         retval = 0;
 923 out:
 924         return retval;
 925 } /* End twa_decode_bits() */
 926
 927 /* This function will empty the response queue */
 928 static int twa_empty_response_queue(TW_Device_Extension *tw_dev)
 929 {
 930         u32 status_reg_value, response_que_value;
 931         int count = 0, retval = 1;
 932
 933         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
 934
 935         while (((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) && (count < TW_MAX_RESPONSE_DRAIN)) {
 936                 response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
 937                 status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
 938                 count++;
 939         }
 940         if (count == TW_MAX_RESPONSE_DRAIN)
 941                 goto out;
 942
 943         retval = 0;
 944 out:
 945         return retval;
 946 } /* End twa_empty_response_queue() */
 947
 948 /* This function will clear the pchip/response queue on 9550SX */
 949 static int twa_empty_response_queue_large(TW_Device_Extension *tw_dev)
 950 {
 951         u32 response_que_value = 0;
 952         unsigned long before;
 953         int retval = 1;
 954
 955         if (tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9000) {
 956                 before = jiffies;
 957                 while ((response_que_value & TW_9550SX_DRAIN_COMPLETED) != TW_9550SX_DRAIN_COMPLETED) {
 958                         response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR_LARGE(tw_dev));
 959                         msleep(1);
 960                         if (time_after(jiffies, before + HZ * 30))
 961                                 goto out;
 962                 }
 963                 /* P-chip settle time */
 964                 msleep(500);
 965                 retval = 0;
 966         } else
 967                 retval = 0;
 968 out:
 969         return retval;
 970 } /* End twa_empty_response_queue_large() */
 971
 972 /* This function passes sense keys from firmware to scsi layer */
 973 static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host)
 974 {
 975         TW_Command_Full *full_command_packet;
 976         unsigned short error;
 977         int retval = 1;
 978         char *error_str;
 979
 980         full_command_packet = tw_dev->command_packet_virt[request_id];
 981
 982         /* Check for embedded error string */
 983         error_str = &(full_command_packet->header.err_specific_desc[strlen(full_command_packet->header.err_specific_desc) + 1]);
 984
 985         /* Don't print error for Logical unit not supported during rollcall */
 986         error = le16_to_cpu(full_command_packet->header.status_block.error);
 987         if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE)) {
 988                 if (print_host)
 989                         printk(KERN_WARNING "3w-9xxx: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
 990                                tw_dev->host->host_no,
 991                                TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
 992                                full_command_packet->header.status_block.error,
 993                                error_str[0] == '\0' ?
 994                                twa_string_lookup(twa_error_table,
 995                                                  full_command_packet->header.status_block.error) : error_str,
 996                                full_command_packet->header.err_specific_desc);
 997                 else
 998                         printk(KERN_WARNING "3w-9xxx: ERROR: (0x%02X:0x%04X): %s:%s.\n",
 999                                TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
1000                                full_command_packet->header.status_block.error,
1001                                error_str[0] == '\0' ?
1002                                twa_string_lookup(twa_error_table,
1003                                                  full_command_packet->header.status_block.error) : error_str,
1004                                full_command_packet->header.err_specific_desc);
1005         }
1006
1007         if (copy_sense) {
1008                 memcpy(tw_dev->srb[request_id]->sense_buffer, full_command_packet->header.sense_data, TW_SENSE_DATA_LENGTH);
1009                 tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
1010                 retval = TW_ISR_DONT_RESULT;
1011                 goto out;
1012         }
1013         retval = 0;
1014 out:
1015         return retval;
1016 } /* End twa_fill_sense() */
1017
1018 /* This function will free up device extension resources */
1019 static void twa_free_device_extension(TW_Device_Extension *tw_dev)
1020 {
1021         if (tw_dev->command_packet_virt[0])
1022                 pci_free_consistent(tw_dev->tw_pci_dev,
1023                                     sizeof(TW_Command_Full)*TW_Q_LENGTH,
1024                                     tw_dev->command_packet_virt[0],
1025                                     tw_dev->command_packet_phys[0]);
1026
1027         if (tw_dev->generic_buffer_virt[0])
1028                 pci_free_consistent(tw_dev->tw_pci_dev,
1029                                     TW_SECTOR_SIZE*TW_Q_LENGTH,
1030                                     tw_dev->generic_buffer_virt[0],
1031                                     tw_dev->generic_buffer_phys[0]);
1032
1033         kfree(tw_dev->event_queue[0]);
1034 } /* End twa_free_device_extension() */
1035
1036 /* This function will free a request id */
1037 static void twa_free_request_id(TW_Device_Extension *tw_dev, int request_id)
1038 {
1039         tw_dev->free_queue[tw_dev->free_tail] = request_id;
1040         tw_dev->state[request_id] = TW_S_FINISHED;
1041         tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
1042 } /* End twa_free_request_id() */
1043
1044 /* This function will get parameter table entries from the firmware */
1045 static void *twa_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes)
1046 {
1047         TW_Command_Full *full_command_packet;
1048         TW_Command *command_packet;
1049         TW_Param_Apache *param;
1050         void *retval = NULL;
1051
1052         /* Setup the command packet */
1053         full_command_packet = tw_dev->command_packet_virt[request_id];
1054         memset(full_command_packet, 0, sizeof(TW_Command_Full));
1055         command_packet = &full_command_packet->command.oldcommand;
1056
1057         command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1058         command_packet->size              = TW_COMMAND_SIZE;
1059         command_packet->request_id        = request_id;
1060         command_packet->byte6_offset.block_count = cpu_to_le16(1);
1061
1062         /* Now setup the param */
1063         param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
1064         memset(param, 0, TW_SECTOR_SIZE);
1065         param->table_id = cpu_to_le16(table_id | 0x8000);
1066         param->parameter_id = cpu_to_le16(parameter_id);
1067         param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes);
1068
1069         command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
1070         command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
1071
1072         /* Post the command packet to the board */
1073         twa_post_command_packet(tw_dev, request_id, 1);
1074
1075         /* Poll for completion */
1076         if (twa_poll_response(tw_dev, request_id, 30))
1077                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "No valid response during get param")
1078         else
1079                 retval = (void *)&(param->data[0]);
1080
1081         tw_dev->posted_request_count--;
1082         tw_dev->state[request_id] = TW_S_INITIAL;
1083
1084         return retval;
1085 } /* End twa_get_param() */
1086
1087 /* This function will assign an available request id */
1088 static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id)
1089 {
1090         *request_id = tw_dev->free_queue[tw_dev->free_head];
1091         tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
1092         tw_dev->state[*request_id] = TW_S_STARTED;
1093 } /* End twa_get_request_id() */
1094
1095 /* This function will send an initconnection command to controller */
1096 static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
1097                               u32 set_features, unsigned short current_fw_srl,
1098                               unsigned short current_fw_arch_id,
1099                               unsigned short current_fw_branch,
1100                               unsigned short current_fw_build,
1101                               unsigned short *fw_on_ctlr_srl,
1102                               unsigned short *fw_on_ctlr_arch_id,
1103                               unsigned short *fw_on_ctlr_branch,
1104                               unsigned short *fw_on_ctlr_build,
1105                               u32 *init_connect_result)
1106 {
1107         TW_Command_Full *full_command_packet;
1108         TW_Initconnect *tw_initconnect;
1109         int request_id = 0, retval = 1;
1110
1111         /* Initialize InitConnection command packet */
1112         full_command_packet = tw_dev->command_packet_virt[request_id];
1113         memset(full_command_packet, 0, sizeof(TW_Command_Full));
1114         full_command_packet->header.header_desc.size_header = 128;
1115
1116         tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand;
1117         tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION);
1118         tw_initconnect->request_id = request_id;
1119         tw_initconnect->message_credits = cpu_to_le16(message_credits);
1120         tw_initconnect->features = set_features;
1121
1122         /* Turn on 64-bit sgl support if we need to */
1123         tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
1124
1125         tw_initconnect->features = cpu_to_le32(tw_initconnect->features);
1126
1127         if (set_features & TW_EXTENDED_INIT_CONNECT) {
1128                 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED;
1129                 tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl);
1130                 tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id);
1131                 tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch);
1132                 tw_initconnect->fw_build = cpu_to_le16(current_fw_build);
1133         } else
1134                 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE;
1135
1136         /* Send command packet to the board */
1137         twa_post_command_packet(tw_dev, request_id, 1);
1138
1139         /* Poll for completion */
1140         if (twa_poll_response(tw_dev, request_id, 30)) {
1141                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "No valid response during init connection");
1142         } else {
1143                 if (set_features & TW_EXTENDED_INIT_CONNECT) {
1144                         *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl);
1145                         *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id);
1146                         *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch);
1147                         *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build);
1148                         *init_connect_result = le32_to_cpu(tw_initconnect->result);
1149                 }
1150                 retval = 0;
1151         }
1152
1153         tw_dev->posted_request_count--;
1154         tw_dev->state[request_id] = TW_S_INITIAL;
1155
1156         return retval;
1157 } /* End twa_initconnection() */
1158
1159 /* This function will initialize the fields of a device extension */
1160 static int twa_initialize_device_extension(TW_Device_Extension *tw_dev)
1161 {
1162         int i, retval = 1;
1163
1164         /* Initialize command packet buffers */
1165         if (twa_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
1166                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Command packet memory allocation failed");
1167                 goto out;
1168         }
1169
1170         /* Initialize generic buffer */
1171         if (twa_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
1172                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x17, "Generic memory allocation failed");
1173                 goto out;
1174         }
1175
1176         /* Allocate event info space */
1177         tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL);
1178         if (!tw_dev->event_queue[0]) {
1179                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x18, "Event info memory allocation failed");
1180                 goto out;
1181         }
1182
1183
1184         for (i = 0; i < TW_Q_LENGTH; i++) {
1185                 tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event)));
1186                 tw_dev->free_queue[i] = i;
1187                 tw_dev->state[i] = TW_S_INITIAL;
1188         }
1189
1190         tw_dev->pending_head = TW_Q_START;
1191         tw_dev->pending_tail = TW_Q_START;
1192         tw_dev->free_head = TW_Q_START;
1193         tw_dev->free_tail = TW_Q_START;
1194         tw_dev->error_sequence_id = 1;
1195         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1196
1197         mutex_init(&tw_dev->ioctl_lock);
1198         init_waitqueue_head(&tw_dev->ioctl_wqueue);
1199
1200         retval = 0;
1201 out:
1202         return retval;
1203 } /* End twa_initialize_device_extension() */
1204
1205 /* This function is the interrupt service routine */
1206 static irqreturn_t twa_interrupt(int irq, void *dev_instance)
1207 {
1208         int request_id, error = 0;
1209         u32 status_reg_value;
1210         TW_Response_Queue response_que;
1211         TW_Command_Full *full_command_packet;
1212         TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
1213         int handled = 0;
1214
1215         /* Get the per adapter lock */
1216         spin_lock(tw_dev->host->host_lock);
1217
1218         /* Read the registers */
1219         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1220
1221         /* Check if this is our interrupt, otherwise bail */
1222         if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
1223                 goto twa_interrupt_bail;
1224
1225         handled = 1;
1226
1227         /* If we are resetting, bail */
1228         if (test_bit(TW_IN_RESET, &tw_dev->flags))
1229                 goto twa_interrupt_bail;
1230
1231         /* Check controller for errors */
1232         if (twa_check_bits(status_reg_value)) {
1233                 if (twa_decode_bits(tw_dev, status_reg_value)) {
1234                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1235                         goto twa_interrupt_bail;
1236                 }
1237         }
1238
1239         /* Handle host interrupt */
1240         if (status_reg_value & TW_STATUS_HOST_INTERRUPT)
1241                 TW_CLEAR_HOST_INTERRUPT(tw_dev);
1242
1243         /* Handle attention interrupt */
1244         if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
1245                 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
1246                 if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
1247                         twa_get_request_id(tw_dev, &request_id);
1248
1249                         error = twa_aen_read_queue(tw_dev, request_id);
1250                         if (error) {
1251                                 tw_dev->state[request_id] = TW_S_COMPLETED;
1252                                 twa_free_request_id(tw_dev, request_id);
1253                                 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
1254                         }
1255                 }
1256         }
1257
1258         /* Handle command interrupt */
1259         if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
1260                 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1261                 /* Drain as many pending commands as we can */
1262                 while (tw_dev->pending_request_count > 0) {
1263                         request_id = tw_dev->pending_queue[tw_dev->pending_head];
1264                         if (tw_dev->state[request_id] != TW_S_PENDING) {
1265                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x19, "Found request id that wasn't pending");
1266                                 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1267                                 goto twa_interrupt_bail;
1268                         }
1269                         if (twa_post_command_packet(tw_dev, request_id, 1)==0) {
1270                                 tw_dev->pending_head = (tw_dev->pending_head + 1) % TW_Q_LENGTH;
1271                                 tw_dev->pending_request_count--;
1272                         } else {
1273                                 /* If we get here, we will continue re-posting on the next command interrupt */
1274                                 break;
1275                         }
1276                 }
1277         }
1278
1279         /* Handle response interrupt */
1280         if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
1281
1282                 /* Drain the response queue from the board */
1283                 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
1284                         /* Complete the response */
1285                         response_que.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1286                         request_id = TW_RESID_OUT(response_que.response_id);
1287                         full_command_packet = tw_dev->command_packet_virt[request_id];
1288                         error = 0;
1289                         /* Check for command packet errors */
1290                         if (full_command_packet->command.newcommand.status != 0) {
1291                                 if (tw_dev->srb[request_id] != NULL) {
1292                                         error = twa_fill_sense(tw_dev, request_id, 1, 1);
1293                                 } else {
1294                                         /* Skip ioctl error prints */
1295                                         if (request_id != tw_dev->chrdev_request_id) {
1296                                                 error = twa_fill_sense(tw_dev, request_id, 0, 1);
1297                                         }
1298                                 }
1299                         }
1300
1301                         /* Check for correct state */
1302                         if (tw_dev->state[request_id] != TW_S_POSTED) {
1303                                 if (tw_dev->srb[request_id] != NULL) {
1304                                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Received a request id that wasn't posted");
1305                                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1306                                         goto twa_interrupt_bail;
1307                                 }
1308                         }
1309
1310                         /* Check for internal command completion */
1311                         if (tw_dev->srb[request_id] == NULL) {
1312                                 if (request_id != tw_dev->chrdev_request_id) {
1313                                         if (twa_aen_complete(tw_dev, request_id))
1314                                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Error completing AEN during attention interrupt");
1315                                 } else {
1316                                         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1317                                         wake_up(&tw_dev->ioctl_wqueue);
1318                                 }
1319                         } else {
1320                                 struct scsi_cmnd *cmd;
1321
1322                                 cmd = tw_dev->srb[request_id];
1323
1324                                 twa_scsiop_execute_scsi_complete(tw_dev, request_id);
1325                                 /* If no error command was a success */
1326                                 if (error == 0) {
1327                                         cmd->result = (DID_OK << 16);
1328                                 }
1329
1330                                 /* If error, command failed */
1331                                 if (error == 1) {
1332                                         /* Ask for a host reset */
1333                                         cmd->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
1334                                 }
1335
1336                                 /* Report residual bytes for single sgl */
1337                                 if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) {
1338                                         if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id]))
1339                                                 scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length);
1340                                 }
1341
1342                                 /* Now complete the io */
1343                                 tw_dev->state[request_id] = TW_S_COMPLETED;
1344                                 twa_free_request_id(tw_dev, request_id);
1345                                 tw_dev->posted_request_count--;
1346                                 tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1347                                 twa_unmap_scsi_data(tw_dev, request_id);
1348                         }
1349
1350                         /* Check for valid status after each drain */
1351                         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1352                         if (twa_check_bits(status_reg_value)) {
1353                                 if (twa_decode_bits(tw_dev, status_reg_value)) {
1354                                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1355                                         goto twa_interrupt_bail;
1356                                 }
1357                         }
1358                 }
1359         }
1360
1361 twa_interrupt_bail:
1362         spin_unlock(tw_dev->host->host_lock);
1363         return IRQ_RETVAL(handled);
1364 } /* End twa_interrupt() */
1365
1366 /* This function will load the request id and various sgls for ioctls */
1367 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)
1368 {
1369         TW_Command *oldcommand;
1370         TW_Command_Apache *newcommand;
1371         TW_SG_Entry *sgl;
1372         unsigned int pae = 0;
1373
1374         if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4))
1375                 pae = 1;
1376
1377         if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
1378                 newcommand = &full_command_packet->command.newcommand;
1379                 newcommand->request_id__lunl =
1380                         cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id));
1381                 newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
1382                 newcommand->sg_list[0].length = cpu_to_le32(length);
1383                 newcommand->sgl_entries__lunh =
1384                         cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), 1));
1385         } else {
1386                 oldcommand = &full_command_packet->command.oldcommand;
1387                 oldcommand->request_id = request_id;
1388
1389                 if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
1390                         /* Load the sg list */
1391                         if (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)
1392                                 sgl = (TW_SG_Entry *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry)/4) + pae);
1393                         else
1394                                 sgl = (TW_SG_Entry *)((u32 *)oldcommand+TW_SGL_OUT(oldcommand->opcode__sgloffset));
1395                         sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
1396                         sgl->length = cpu_to_le32(length);
1397
1398                         oldcommand->size += pae;
1399                 }
1400         }
1401 } /* End twa_load_sgl() */
1402
1403 /* This function will perform a pci-dma mapping for a scatter gather list */
1404 static int twa_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)
1405 {
1406         int use_sg;
1407         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1408
1409         use_sg = scsi_dma_map(cmd);
1410         if (!use_sg)
1411                 return 0;
1412         else if (use_sg < 0) {
1413                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to map scatter gather list");
1414                 return 0;
1415         }
1416
1417         cmd->SCp.phase = TW_PHASE_SGLIST;
1418         cmd->SCp.have_data_in = use_sg;
1419
1420         return use_sg;
1421 } /* End twa_map_scsi_sg_data() */
1422
1423 /* This function will poll for a response interrupt of a request */
1424 static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
1425 {
1426         int retval = 1, found = 0, response_request_id;
1427         TW_Response_Queue response_queue;
1428         TW_Command_Full *full_command_packet = tw_dev->command_packet_virt[request_id];
1429
1430         if (twa_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, seconds) == 0) {
1431                 response_queue.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1432                 response_request_id = TW_RESID_OUT(response_queue.response_id);
1433                 if (request_id != response_request_id) {
1434                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "Found unexpected request id while polling for response");
1435                         goto out;
1436                 }
1437                 if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
1438                         if (full_command_packet->command.newcommand.status != 0) {
1439                                 /* bad response */
1440                                 twa_fill_sense(tw_dev, request_id, 0, 0);
1441                                 goto out;
1442                         }
1443                         found = 1;
1444                 } else {
1445                         if (full_command_packet->command.oldcommand.status != 0) {
1446                                 /* bad response */
1447                                 twa_fill_sense(tw_dev, request_id, 0, 0);
1448                                 goto out;
1449                         }
1450                         found = 1;
1451                 }
1452         }
1453
1454         if (found)
1455                 retval = 0;
1456 out:
1457         return retval;
1458 } /* End twa_poll_response() */
1459
1460 /* This function will poll the status register for a flag */
1461 static int twa_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
1462 {
1463         u32 status_reg_value;
1464         unsigned long before;
1465         int retval = 1;
1466
1467         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1468         before = jiffies;
1469
1470         if (twa_check_bits(status_reg_value))
1471                 twa_decode_bits(tw_dev, status_reg_value);
1472
1473         while ((status_reg_value & flag) != flag) {
1474                 status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1475
1476                 if (twa_check_bits(status_reg_value))
1477                         twa_decode_bits(tw_dev, status_reg_value);
1478
1479                 if (time_after(jiffies, before + HZ * seconds))
1480                         goto out;
1481
1482                 msleep(50);
1483         }
1484         retval = 0;
1485 out:
1486         return retval;
1487 } /* End twa_poll_status() */
1488
1489 /* This function will poll the status register for disappearance of a flag */
1490 static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
1491 {
1492         u32 status_reg_value;
1493         unsigned long before;
1494         int retval = 1;
1495
1496         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1497         before = jiffies;
1498
1499         if (twa_check_bits(status_reg_value))
1500                 twa_decode_bits(tw_dev, status_reg_value);
1501
1502         while ((status_reg_value & flag) != 0) {
1503                 status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1504                 if (twa_check_bits(status_reg_value))
1505                         twa_decode_bits(tw_dev, status_reg_value);
1506
1507                 if (time_after(jiffies, before + HZ * seconds))
1508                         goto out;
1509
1510                 msleep(50);
1511         }
1512         retval = 0;
1513 out:
1514         return retval;
1515 } /* End twa_poll_status_gone() */
1516
1517 /* This function will attempt to post a command packet to the board */
1518 static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal)
1519 {
1520         u32 status_reg_value;
1521         dma_addr_t command_que_value;
1522         int retval = 1;
1523
1524         command_que_value = tw_dev->command_packet_phys[request_id];
1525
1526         /* For 9650SE write low 4 bytes first */
1527         if ((tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
1528             (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)) {
1529                 command_que_value += TW_COMMAND_OFFSET;
1530                 writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR_LARGE(tw_dev));
1531         }
1532
1533         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1534
1535         if (twa_check_bits(status_reg_value))
1536                 twa_decode_bits(tw_dev, status_reg_value);
1537
1538         if (((tw_dev->pending_request_count > 0) && (tw_dev->state[request_id] != TW_S_PENDING)) || (status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL)) {
1539
1540                 /* Only pend internal driver commands */
1541                 if (!internal) {
1542                         retval = SCSI_MLQUEUE_HOST_BUSY;
1543                         goto out;
1544                 }
1545
1546                 /* Couldn't post the command packet, so we do it later */
1547                 if (tw_dev->state[request_id] != TW_S_PENDING) {
1548                         tw_dev->state[request_id] = TW_S_PENDING;
1549                         tw_dev->pending_request_count++;
1550                         if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
1551                                 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
1552                         }
1553                         tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
1554                         tw_dev->pending_tail = (tw_dev->pending_tail + 1) % TW_Q_LENGTH;
1555                 }
1556                 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
1557                 goto out;
1558         } else {
1559                 if ((tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
1560                     (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)) {
1561                         /* Now write upper 4 bytes */
1562                         writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR_LARGE(tw_dev) + 0x4);
1563                 } else {
1564                         if (sizeof(dma_addr_t) > 4) {
1565                                 command_que_value += TW_COMMAND_OFFSET;
1566                                 writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1567                                 writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR(tw_dev) + 0x4);
1568                         } else {
1569                                 writel(TW_COMMAND_OFFSET + command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1570                         }
1571                 }
1572                 tw_dev->state[request_id] = TW_S_POSTED;
1573                 tw_dev->posted_request_count++;
1574                 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
1575                         tw_dev->max_posted_request_count = tw_dev->posted_request_count;
1576                 }
1577         }
1578         retval = 0;
1579 out:
1580         return retval;
1581 } /* End twa_post_command_packet() */
1582
1583 /* This function will reset a device extension */
1584 static int twa_reset_device_extension(TW_Device_Extension *tw_dev)
1585 {
1586         int i = 0;
1587         int retval = 1;
1588         unsigned long flags = 0;
1589
1590         set_bit(TW_IN_RESET, &tw_dev->flags);
1591         TW_DISABLE_INTERRUPTS(tw_dev);
1592         TW_MASK_COMMAND_INTERRUPT(tw_dev);
1593         spin_lock_irqsave(tw_dev->host->host_lock, flags);
1594
1595         /* Abort all requests that are in progress */
1596         for (i = 0; i < TW_Q_LENGTH; i++) {
1597                 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1598                     (tw_dev->state[i] != TW_S_INITIAL) &&
1599                     (tw_dev->state[i] != TW_S_COMPLETED)) {
1600                         if (tw_dev->srb[i]) {
1601                                 tw_dev->srb[i]->result = (DID_RESET << 16);
1602                                 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
1603                                 twa_unmap_scsi_data(tw_dev, i);
1604                         }
1605                 }
1606         }
1607
1608         /* Reset queues and counts */
1609         for (i = 0; i < TW_Q_LENGTH; i++) {
1610                 tw_dev->free_queue[i] = i;
1611                 tw_dev->state[i] = TW_S_INITIAL;
1612         }
1613         tw_dev->free_head = TW_Q_START;
1614         tw_dev->free_tail = TW_Q_START;
1615         tw_dev->posted_request_count = 0;
1616         tw_dev->pending_request_count = 0;
1617         tw_dev->pending_head = TW_Q_START;
1618         tw_dev->pending_tail = TW_Q_START;
1619         tw_dev->reset_print = 0;
1620
1621         spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1622
1623         if (twa_reset_sequence(tw_dev, 1))
1624                 goto out;
1625
1626         TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1627         clear_bit(TW_IN_RESET, &tw_dev->flags);
1628         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1629
1630         retval = 0;
1631 out:
1632         return retval;
1633 } /* End twa_reset_device_extension() */
1634
1635 /* This function will reset a controller */
1636 static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
1637 {
1638         int tries = 0, retval = 1, flashed = 0, do_soft_reset = soft_reset;
1639
1640         while (tries < TW_MAX_RESET_TRIES) {
1641                 if (do_soft_reset) {
1642                         TW_SOFT_RESET(tw_dev);
1643                         /* Clear pchip/response queue on 9550SX */
1644                         if (twa_empty_response_queue_large(tw_dev)) {
1645                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x36, "Response queue (large) empty failed during reset sequence");
1646                                 do_soft_reset = 1;
1647                                 tries++;
1648                                 continue;
1649                         }
1650                 }
1651
1652                 /* Make sure controller is in a good state */
1653                 if (twa_poll_status(tw_dev, TW_STATUS_MICROCONTROLLER_READY | (do_soft_reset == 1 ? TW_STATUS_ATTENTION_INTERRUPT : 0), 60)) {
1654                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Microcontroller not ready during reset sequence");
1655                         do_soft_reset = 1;
1656                         tries++;
1657                         continue;
1658                 }
1659
1660                 /* Empty response queue */
1661                 if (twa_empty_response_queue(tw_dev)) {
1662                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Response queue empty failed during reset sequence");
1663                         do_soft_reset = 1;
1664                         tries++;
1665                         continue;
1666                 }
1667
1668                 flashed = 0;
1669
1670                 /* Check for compatibility/flash */
1671                 if (twa_check_srl(tw_dev, &flashed)) {
1672                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Compatibility check failed during reset sequence");
1673                         do_soft_reset = 1;
1674                         tries++;
1675                         continue;
1676                 } else {
1677                         if (flashed) {
1678                                 tries++;
1679                                 continue;
1680                         }
1681                 }
1682
1683                 /* Drain the AEN queue */
1684                 if (twa_aen_drain_queue(tw_dev, soft_reset)) {
1685                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x22, "AEN drain failed during reset sequence");
1686                         do_soft_reset = 1;
1687                         tries++;
1688                         continue;
1689                 }
1690
1691                 /* If we got here, controller is in a good state */
1692                 retval = 0;
1693                 goto out;
1694         }
1695 out:
1696         return retval;
1697 } /* End twa_reset_sequence() */
1698
1699 /* This funciton returns unit geometry in cylinders/heads/sectors */
1700 static int twa_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[])
1701 {
1702         int heads, sectors, cylinders;
1703         TW_Device_Extension *tw_dev;
1704
1705         tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1706
1707         if (capacity >= 0x200000) {
1708                 heads = 255;
1709                 sectors = 63;
1710                 cylinders = sector_div(capacity, heads * sectors);
1711         } else {
1712                 heads = 64;
1713                 sectors = 32;
1714                 cylinders = sector_div(capacity, heads * sectors);
1715         }
1716
1717         geom[0] = heads;
1718         geom[1] = sectors;
1719         geom[2] = cylinders;
1720
1721         return 0;
1722 } /* End twa_scsi_biosparam() */
1723
1724 /* This is the new scsi eh reset function */
1725 static int twa_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1726 {
1727         TW_Device_Extension *tw_dev = NULL;
1728         int retval = FAILED;
1729
1730         tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1731
1732         tw_dev->num_resets++;
1733
1734         sdev_printk(KERN_WARNING, SCpnt->device,
1735                 "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n",
1736                 TW_DRIVER, 0x2c, SCpnt->cmnd[0]);
1737
1738         /* Make sure we are not issuing an ioctl or resetting from ioctl */
1739         mutex_lock(&tw_dev->ioctl_lock);
1740
1741         /* Now reset the card and some of the device extension data */
1742         if (twa_reset_device_extension(tw_dev)) {
1743                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2b, "Controller reset failed during scsi host reset");
1744                 goto out;
1745         }
1746
1747         retval = SUCCESS;
1748 out:
1749         mutex_unlock(&tw_dev->ioctl_lock);
1750         return retval;
1751 } /* End twa_scsi_eh_reset() */
1752
1753 /* This is the main scsi queue function to handle scsi opcodes */
1754 static int twa_scsi_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1755 {
1756         int request_id, retval;
1757         TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1758
1759         /* If we are resetting due to timed out ioctl, report as busy */
1760         if (test_bit(TW_IN_RESET, &tw_dev->flags)) {
1761                 retval = SCSI_MLQUEUE_HOST_BUSY;
1762                 goto out;
1763         }
1764
1765         /* Check if this FW supports luns */
1766         if ((SCpnt->device->lun != 0) && (tw_dev->tw_compat_info.working_srl < TW_FW_SRL_LUNS_SUPPORTED)) {
1767                 SCpnt->result = (DID_BAD_TARGET << 16);
1768                 done(SCpnt);
1769                 retval = 0;
1770                 goto out;
1771         }
1772
1773         /* Save done function into scsi_cmnd struct */
1774         SCpnt->scsi_done = done;
1775
1776         /* Get a free request id */
1777         twa_get_request_id(tw_dev, &request_id);
1778
1779         /* Save the scsi command for use by the ISR */
1780         tw_dev->srb[request_id] = SCpnt;
1781
1782         /* Initialize phase to zero */
1783         SCpnt->SCp.phase = TW_PHASE_INITIAL;
1784
1785         retval = twa_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
1786         switch (retval) {
1787         case SCSI_MLQUEUE_HOST_BUSY:
1788                 twa_free_request_id(tw_dev, request_id);
1789                 break;
1790         case 1:
1791                 tw_dev->state[request_id] = TW_S_COMPLETED;
1792                 twa_free_request_id(tw_dev, request_id);
1793                 SCpnt->result = (DID_ERROR << 16);
1794                 done(SCpnt);
1795                 retval = 0;
1796         }
1797 out:
1798         return retval;
1799 } /* End twa_scsi_queue() */
1800
1801 /* This function hands scsi cdb's to the firmware */
1802 static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg)
1803 {
1804         TW_Command_Full *full_command_packet;
1805         TW_Command_Apache *command_packet;
1806         u32 num_sectors = 0x0;
1807         int i, sg_count;
1808         struct scsi_cmnd *srb = NULL;
1809         struct scatterlist *sglist = NULL, *sg;
1810         int retval = 1;
1811
1812         if (tw_dev->srb[request_id]) {
1813                 srb = tw_dev->srb[request_id];
1814                 if (scsi_sglist(srb))
1815                         sglist = scsi_sglist(srb);
1816         }
1817
1818         /* Initialize command packet */
1819         full_command_packet = tw_dev->command_packet_virt[request_id];
1820         full_command_packet->header.header_desc.size_header = 128;
1821         full_command_packet->header.status_block.error = 0;
1822         full_command_packet->header.status_block.severity__reserved = 0;
1823
1824         command_packet = &full_command_packet->command.newcommand;
1825         command_packet->status = 0;
1826         command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI);
1827
1828         /* We forced 16 byte cdb use earlier */
1829         if (!cdb)
1830                 memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN);
1831         else
1832                 memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN);
1833
1834         if (srb) {
1835                 command_packet->unit = srb->device->id;
1836                 command_packet->request_id__lunl =
1837                         cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id));
1838         } else {
1839                 command_packet->request_id__lunl =
1840                         cpu_to_le16(TW_REQ_LUN_IN(0, request_id));
1841                 command_packet->unit = 0;
1842         }
1843
1844         command_packet->sgl_offset = 16;
1845
1846         if (!sglistarg) {
1847                 /* Map sglist from scsi layer to cmd packet */
1848
1849                 if (scsi_sg_count(srb)) {
1850                         if ((scsi_sg_count(srb) == 1) &&
1851                             (scsi_bufflen(srb) < TW_MIN_SGL_LENGTH)) {
1852                                 if (srb->sc_data_direction == DMA_TO_DEVICE ||
1853                                     srb->sc_data_direction == DMA_BIDIRECTIONAL)
1854                                         scsi_sg_copy_to_buffer(srb,
1855                                                                tw_dev->generic_buffer_virt[request_id],
1856                                                                TW_SECTOR_SIZE);
1857                                 command_packet->sg_list[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
1858                                 command_packet->sg_list[0].length = cpu_to_le32(TW_MIN_SGL_LENGTH);
1859                         } else {
1860                                 sg_count = twa_map_scsi_sg_data(tw_dev, request_id);
1861                                 if (sg_count == 0)
1862                                         goto out;
1863
1864                                 scsi_for_each_sg(srb, sg, sg_count, i) {
1865                                         command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg));
1866                                         command_packet->sg_list[i].length = cpu_to_le32(sg_dma_len(sg));
1867                                         if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
1868                                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2e, "Found unaligned sgl address during execute scsi");
1869                                                 goto out;
1870                                         }
1871                                 }
1872                         }
1873                         command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id])));
1874                 }
1875         } else {
1876                 /* Internal cdb post */
1877                 for (i = 0; i < use_sg; i++) {
1878                         command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address);
1879                         command_packet->sg_list[i].length = cpu_to_le32(sglistarg[i].length);
1880                         if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
1881                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2f, "Found unaligned sgl address during internal post");
1882                                 goto out;
1883                         }
1884                 }
1885                 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg));
1886         }
1887
1888         if (srb) {
1889                 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6)
1890                         num_sectors = (u32)srb->cmnd[4];
1891
1892                 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10)
1893                         num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1894         }
1895
1896         /* Update sector statistic */
1897         tw_dev->sector_count = num_sectors;
1898         if (tw_dev->sector_count > tw_dev->max_sector_count)
1899                 tw_dev->max_sector_count = tw_dev->sector_count;
1900
1901         /* Update SG statistics */
1902         if (srb) {
1903                 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1904                 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1905                         tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1906         }
1907
1908         /* Now post the command to the board */
1909         if (srb) {
1910                 retval = twa_post_command_packet(tw_dev, request_id, 0);
1911         } else {
1912                 twa_post_command_packet(tw_dev, request_id, 1);
1913                 retval = 0;
1914         }
1915 out:
1916         return retval;
1917 } /* End twa_scsiop_execute_scsi() */
1918
1919 /* This function completes an execute scsi operation */
1920 static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id)
1921 {
1922         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1923
1924         if (scsi_bufflen(cmd) < TW_MIN_SGL_LENGTH &&
1925             (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1926              cmd->sc_data_direction == DMA_BIDIRECTIONAL)) {
1927                 if (scsi_sg_count(cmd) == 1) {
1928                         void *buf = tw_dev->generic_buffer_virt[request_id];
1929
1930                         scsi_sg_copy_from_buffer(cmd, buf, TW_SECTOR_SIZE);
1931                 }
1932         }
1933 } /* End twa_scsiop_execute_scsi_complete() */
1934
1935 /* This function tells the controller to shut down */
1936 static void __twa_shutdown(TW_Device_Extension *tw_dev)
1937 {
1938         /* Disable interrupts */
1939         TW_DISABLE_INTERRUPTS(tw_dev);
1940
1941         /* Free up the IRQ */
1942         free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
1943
1944         printk(KERN_WARNING "3w-9xxx: Shutting down host %d.\n", tw_dev->host->host_no);
1945
1946         /* Tell the card we are shutting down */
1947         if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
1948                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x31, "Connection shutdown failed");
1949         } else {
1950                 printk(KERN_WARNING "3w-9xxx: Shutdown complete.\n");
1951         }
1952
1953         /* Clear all interrupts just before exit */
1954         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1955 } /* End __twa_shutdown() */
1956
1957 /* Wrapper for __twa_shutdown */
1958 static void twa_shutdown(struct pci_dev *pdev)
1959 {
1960         struct Scsi_Host *host = pci_get_drvdata(pdev);
1961         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
1962
1963         __twa_shutdown(tw_dev);
1964 } /* End twa_shutdown() */
1965
1966 /* This function will look up a string */
1967 static char *twa_string_lookup(twa_message_type *table, unsigned int code)
1968 {
1969         int index;
1970
1971         for (index = 0; ((code != table[index].code) &&
1972                       (table[index].text != (char *)0)); index++);
1973         return(table[index].text);
1974 } /* End twa_string_lookup() */
1975
1976 /* This function will perform a pci-dma unmap */
1977 static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)
1978 {
1979         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1980
1981         scsi_dma_unmap(cmd);
1982 } /* End twa_unmap_scsi_data() */
1983
1984 /* scsi_host_template initializer */
1985 static struct scsi_host_template driver_template = {
1986         .module                 = THIS_MODULE,
1987         .name                   = "3ware 9000 Storage Controller",
1988         .queuecommand           = twa_scsi_queue,
1989         .eh_host_reset_handler  = twa_scsi_eh_reset,
1990         .bios_param             = twa_scsi_biosparam,
1991         .change_queue_depth     = twa_change_queue_depth,
1992         .can_queue              = TW_Q_LENGTH-2,
1993         .this_id                = -1,
1994         .sg_tablesize           = TW_APACHE_MAX_SGL_LENGTH,
1995         .max_sectors            = TW_MAX_SECTORS,
1996         .cmd_per_lun            = TW_MAX_CMDS_PER_LUN,
1997         .use_clustering         = ENABLE_CLUSTERING,
1998         .shost_attrs            = twa_host_attrs,
1999         .emulated               = 1
2000 };
2001
2002 /* This function will probe and initialize a card */
2003 static int __devinit twa_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2004 {
2005         struct Scsi_Host *host = NULL;
2006         TW_Device_Extension *tw_dev;
2007         unsigned long mem_addr, mem_len;
2008         int retval = -ENODEV;
2009
2010         retval = pci_enable_device(pdev);
2011         if (retval) {
2012                 TW_PRINTK(host, TW_DRIVER, 0x34, "Failed to enable pci device");
2013                 goto out_disable_device;
2014         }
2015
2016         pci_set_master(pdev);
2017         pci_try_set_mwi(pdev);
2018
2019         if (pci_set_dma_mask(pdev, DMA_64BIT_MASK)
2020             || pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))
2021                 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)
2022                     || pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)) {
2023                         TW_PRINTK(host, TW_DRIVER, 0x23, "Failed to set dma mask");
2024                         retval = -ENODEV;
2025                         goto out_disable_device;
2026                 }
2027
2028         host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2029         if (!host) {
2030                 TW_PRINTK(host, TW_DRIVER, 0x24, "Failed to allocate memory for device extension");
2031                 retval = -ENOMEM;
2032                 goto out_disable_device;
2033         }
2034         tw_dev = (TW_Device_Extension *)host->hostdata;
2035
2036         /* Save values to device extension */
2037         tw_dev->host = host;
2038         tw_dev->tw_pci_dev = pdev;
2039
2040         if (twa_initialize_device_extension(tw_dev)) {
2041                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x25, "Failed to initialize device extension");
2042                 goto out_free_device_extension;
2043         }
2044
2045         /* Request IO regions */
2046         retval = pci_request_regions(pdev, "3w-9xxx");
2047         if (retval) {
2048                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Failed to get mem region");
2049                 goto out_free_device_extension;
2050         }
2051
2052         if (pdev->device == PCI_DEVICE_ID_3WARE_9000) {
2053                 mem_addr = pci_resource_start(pdev, 1);
2054                 mem_len = pci_resource_len(pdev, 1);
2055         } else {
2056                 mem_addr = pci_resource_start(pdev, 2);
2057                 mem_len = pci_resource_len(pdev, 2);
2058         }
2059
2060         /* Save base address */
2061         tw_dev->base_addr = ioremap(mem_addr, mem_len);
2062         if (!tw_dev->base_addr) {
2063                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x35, "Failed to ioremap");
2064                 goto out_release_mem_region;
2065         }
2066
2067         /* Disable interrupts on the card */
2068         TW_DISABLE_INTERRUPTS(tw_dev);
2069
2070         /* Initialize the card */
2071         if (twa_reset_sequence(tw_dev, 0))
2072                 goto out_iounmap;
2073
2074         /* Set host specific parameters */
2075         if ((pdev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
2076             (pdev->device == PCI_DEVICE_ID_3WARE_9690SA))
2077                 host->max_id = TW_MAX_UNITS_9650SE;
2078         else
2079                 host->max_id = TW_MAX_UNITS;
2080
2081         host->max_cmd_len = TW_MAX_CDB_LEN;
2082
2083         /* Channels aren't supported by adapter */
2084         host->max_lun = TW_MAX_LUNS(tw_dev->tw_compat_info.working_srl);
2085         host->max_channel = 0;
2086
2087         /* Register the card with the kernel SCSI layer */
2088         retval = scsi_add_host(host, &pdev->dev);
2089         if (retval) {
2090                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x27, "scsi add host failed");
2091                 goto out_iounmap;
2092         }
2093
2094         pci_set_drvdata(pdev, host);
2095
2096         printk(KERN_WARNING "3w-9xxx: scsi%d: Found a 3ware 9000 Storage Controller at 0x%lx, IRQ: %d.\n",
2097                host->host_no, mem_addr, pdev->irq);
2098         printk(KERN_WARNING "3w-9xxx: scsi%d: Firmware %s, BIOS %s, Ports: %d.\n",
2099                host->host_no,
2100                (char *)twa_get_param(tw_dev, 0, TW_VERSION_TABLE,
2101                                      TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
2102                (char *)twa_get_param(tw_dev, 1, TW_VERSION_TABLE,
2103                                      TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
2104                le32_to_cpu(*(int *)twa_get_param(tw_dev, 2, TW_INFORMATION_TABLE,
2105                                      TW_PARAM_PORTCOUNT, TW_PARAM_PORTCOUNT_LENGTH)));
2106
2107         /* Try to enable MSI */
2108         if (use_msi && (pdev->device != PCI_DEVICE_ID_3WARE_9000) &&
2109             !pci_enable_msi(pdev))
2110                 set_bit(TW_USING_MSI, &tw_dev->flags);
2111
2112         /* Now setup the interrupt handler */
2113         retval = request_irq(pdev->irq, twa_interrupt, IRQF_SHARED, "3w-9xxx", tw_dev);
2114         if (retval) {
2115                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x30, "Error requesting IRQ");
2116                 goto out_remove_host;
2117         }
2118
2119         twa_device_extension_list[twa_device_extension_count] = tw_dev;
2120         twa_device_extension_count++;
2121
2122         /* Re-enable interrupts on the card */
2123         TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2124
2125         /* Finally, scan the host */
2126         scsi_scan_host(host);
2127
2128         if (twa_major == -1) {
2129                 if ((twa_major = register_chrdev (0, "twa", &twa_fops)) < 0)
2130                         TW_PRINTK(host, TW_DRIVER, 0x29, "Failed to register character device");
2131         }
2132         return 0;
2133
2134 out_remove_host:
2135         if (test_bit(TW_USING_MSI, &tw_dev->flags))
2136                 pci_disable_msi(pdev);
2137         scsi_remove_host(host);
2138 out_iounmap:
2139         iounmap(tw_dev->base_addr);
2140 out_release_mem_region:
2141         pci_release_regions(pdev);
2142 out_free_device_extension:
2143         twa_free_device_extension(tw_dev);
2144         scsi_host_put(host);
2145 out_disable_device:
2146         pci_disable_device(pdev);
2147
2148         return retval;
2149 } /* End twa_probe() */
2150
2151 /* This function is called to remove a device */
2152 static void twa_remove(struct pci_dev *pdev)
2153 {
2154         struct Scsi_Host *host = pci_get_drvdata(pdev);
2155         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2156
2157         scsi_remove_host(tw_dev->host);
2158
2159         /* Unregister character device */
2160         if (twa_major >= 0) {
2161                 unregister_chrdev(twa_major, "twa");
2162                 twa_major = -1;
2163         }
2164
2165         /* Shutdown the card */
2166         __twa_shutdown(tw_dev);
2167
2168         /* Disable MSI if enabled */
2169         if (test_bit(TW_USING_MSI, &tw_dev->flags))
2170                 pci_disable_msi(pdev);
2171
2172         /* Free IO remapping */
2173         iounmap(tw_dev->base_addr);
2174
2175         /* Free up the mem region */
2176         pci_release_regions(pdev);
2177
2178         /* Free up device extension resources */
2179         twa_free_device_extension(tw_dev);
2180
2181         scsi_host_put(tw_dev->host);
2182         pci_disable_device(pdev);
2183         twa_device_extension_count--;
2184 } /* End twa_remove() */
2185
2186 #ifdef CONFIG_PM
2187 /* This function is called on PCI suspend */
2188 static int twa_suspend(struct pci_dev *pdev, pm_message_t state)
2189 {
2190         struct Scsi_Host *host = pci_get_drvdata(pdev);
2191         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2192
2193         printk(KERN_WARNING "3w-9xxx: Suspending host %d.\n", tw_dev->host->host_no);
2194
2195         TW_DISABLE_INTERRUPTS(tw_dev);
2196         free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2197
2198         if (test_bit(TW_USING_MSI, &tw_dev->flags))
2199                 pci_disable_msi(pdev);
2200
2201         /* Tell the card we are shutting down */
2202         if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
2203                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x38, "Connection shutdown failed during suspend");
2204         } else {
2205                 printk(KERN_WARNING "3w-9xxx: Suspend complete.\n");
2206         }
2207         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2208
2209         pci_save_state(pdev);
2210         pci_disable_device(pdev);
2211         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2212
2213         return 0;
2214 } /* End twa_suspend() */
2215
2216 /* This function is called on PCI resume */
2217 static int twa_resume(struct pci_dev *pdev)
2218 {
2219         int retval = 0;
2220         struct Scsi_Host *host = pci_get_drvdata(pdev);
2221         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2222
2223         printk(KERN_WARNING "3w-9xxx: Resuming host %d.\n", tw_dev->host->host_no);
2224         pci_set_power_state(pdev, PCI_D0);
2225         pci_enable_wake(pdev, PCI_D0, 0);
2226         pci_restore_state(pdev);
2227
2228         retval = pci_enable_device(pdev);
2229         if (retval) {
2230                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x39, "Enable device failed during resume");
2231                 return retval;
2232         }
2233
2234         pci_set_master(pdev);
2235         pci_try_set_mwi(pdev);
2236
2237         if (pci_set_dma_mask(pdev, DMA_64BIT_MASK)
2238             || pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))
2239                 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)
2240                     || pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)) {
2241                         TW_PRINTK(host, TW_DRIVER, 0x40, "Failed to set dma mask during resume");
2242                         retval = -ENODEV;
2243                         goto out_disable_device;
2244                 }
2245
2246         /* Initialize the card */
2247         if (twa_reset_sequence(tw_dev, 0)) {
2248                 retval = -ENODEV;
2249                 goto out_disable_device;
2250         }
2251
2252         /* Now setup the interrupt handler */
2253         retval = request_irq(pdev->irq, twa_interrupt, IRQF_SHARED, "3w-9xxx", tw_dev);
2254         if (retval) {
2255                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x42, "Error requesting IRQ during resume");
2256                 retval = -ENODEV;
2257                 goto out_disable_device;
2258         }
2259
2260         /* Now enable MSI if enabled */
2261         if (test_bit(TW_USING_MSI, &tw_dev->flags))
2262                 pci_enable_msi(pdev);
2263
2264         /* Re-enable interrupts on the card */
2265         TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2266
2267         printk(KERN_WARNING "3w-9xxx: Resume complete.\n");
2268         return 0;
2269
2270 out_disable_device:
2271         scsi_remove_host(host);
2272         pci_disable_device(pdev);
2273
2274         return retval;
2275 } /* End twa_resume() */
2276 #endif
2277
2278 /* PCI Devices supported by this driver */
2279 static struct pci_device_id twa_pci_tbl[] __devinitdata = {
2280         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9000,
2281           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2282         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9550SX,
2283           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2284         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9650SE,
2285           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2286         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9690SA,
2287           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2288         { }
2289 };
2290 MODULE_DEVICE_TABLE(pci, twa_pci_tbl);
2291
2292 /* pci_driver initializer */
2293 static struct pci_driver twa_driver = {
2294         .name           = "3w-9xxx",
2295         .id_table       = twa_pci_tbl,
2296         .probe          = twa_probe,
2297         .remove         = twa_remove,
2298 #ifdef CONFIG_PM
2299         .suspend        = twa_suspend,
2300         .resume         = twa_resume,
2301 #endif
2302         .shutdown       = twa_shutdown
2303 };
2304
2305 /* This function is called on driver initialization */
2306 static int __init twa_init(void)
2307 {
2308         printk(KERN_WARNING "3ware 9000 Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2309
2310         return pci_register_driver(&twa_driver);
2311 } /* End twa_init() */
2312
2313 /* This function is called on driver exit */
2314 static void __exit twa_exit(void)
2315 {
2316         pci_unregister_driver(&twa_driver);
2317 } /* End twa_exit() */
2318
2319 module_init(twa_init);
2320 module_exit(twa_exit);
2321