drivers/scsi/3w-9xxx.c

   1 /*
   2    3w-9xxx.c -- 3ware 9000 Storage Controller device driver for Linux.
   3
   4    Written By: Adam Radford <aradford@gmail.com>
   5    Modifications By: Tom Couch
   6
   7    Copyright (C) 2004-2009 Applied Micro Circuits Corporation.
   8    Copyright (C) 2010 LSI Corporation.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; version 2 of the License.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    NO WARRANTY
  20    THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  21    CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  22    LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  23    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  24    solely responsible for determining the appropriateness of using and
  25    distributing the Program and assumes all risks associated with its
  26    exercise of rights under this Agreement, including but not limited to
  27    the risks and costs of program errors, damage to or loss of data,
  28    programs or equipment, and unavailability or interruption of operations.
  29
  30    DISCLAIMER OF LIABILITY
  31    NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  32    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33    DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  34    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  35    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  36    USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  37    HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  38
  39    You should have received a copy of the GNU General Public License
  40    along with this program; if not, write to the Free Software
  41    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  42
  43    Bugs/Comments/Suggestions should be mailed to:
  44    aradford@gmail.com
  45
  46    Note: This version of the driver does not contain a bundled firmware
  47          image.
  48
  49    History
  50    -------
  51    2.26.02.000 - Driver cleanup for kernel submission.
  52    2.26.02.001 - Replace schedule_timeout() calls with msleep().
  53    2.26.02.002 - Add support for PAE mode.
  54                  Add lun support.
  55                  Fix twa_remove() to free irq handler/unregister_chrdev()
  56                  before shutting down card.
  57                  Change to new 'change_queue_depth' api.
  58                  Fix 'handled=1' ISR usage, remove bogus IRQ check.
  59                  Remove un-needed eh_abort handler.
  60                  Add support for embedded firmware error strings.
  61    2.26.02.003 - Correctly handle single sgl's with use_sg=1.
  62    2.26.02.004 - Add support for 9550SX controllers.
  63    2.26.02.005 - Fix use_sg == 0 mapping on systems with 4GB or higher.
  64    2.26.02.006 - Fix 9550SX pchip reset timeout.
  65                  Add big endian support.
  66    2.26.02.007 - Disable local interrupts during kmap/unmap_atomic().
  67    2.26.02.008 - Free irq handler in __twa_shutdown().
  68                  Serialize reset code.
  69                  Add support for 9650SE controllers.
  70    2.26.02.009 - Fix dma mask setting to fallback to 32-bit if 64-bit fails.
  71    2.26.02.010 - Add support for 9690SA controllers.
  72    2.26.02.011 - Increase max AENs drained to 256.
  73                  Add MSI support and "use_msi" module parameter.
  74                  Fix bug in twa_get_param() on 4GB+.
  75                  Use pci_resource_len() for ioremap().
  76    2.26.02.012 - Add power management support.
  77    2.26.02.013 - Fix bug in twa_load_sgl().
  78    2.26.02.014 - Force 60 second timeout default.
  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/slab.h>
  93 #include <asm/io.h>
  94 #include <asm/irq.h>
  95 #include <linux/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 "2.26.02.014"
 104 static DEFINE_MUTEX(twa_chrdev_mutex);
 105 static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT];
 106 static unsigned int twa_device_extension_count;
 107 static int twa_major = -1;
 108 extern struct timezone sys_tz;
 109
 110 /* Module parameters */
 111 MODULE_AUTHOR ("LSI");
 112 MODULE_DESCRIPTION ("3ware 9000 Storage Controller Linux Driver");
 113 MODULE_LICENSE("GPL");
 114 MODULE_VERSION(TW_DRIVER_VERSION);
 115
 116 static int use_msi = 0;
 117 module_param(use_msi, int, S_IRUGO);
 118 MODULE_PARM_DESC(use_msi, "Use Message Signaled Interrupts.  Default: 0");
 119
 120 /* Function prototypes */
 121 static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header);
 122 static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id);
 123 static char *twa_aen_severity_lookup(unsigned char severity_code);
 124 static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id);
 125 static long twa_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 126 static int twa_chrdev_open(struct inode *inode, struct file *file);
 127 static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host);
 128 static void twa_free_request_id(TW_Device_Extension *tw_dev,int request_id);
 129 static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id);
 130 static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
 131                               u32 set_features, unsigned short current_fw_srl,
 132                               unsigned short current_fw_arch_id,
 133                               unsigned short current_fw_branch,
 134                               unsigned short current_fw_build,
 135                               unsigned short *fw_on_ctlr_srl,
 136                               unsigned short *fw_on_ctlr_arch_id,
 137                               unsigned short *fw_on_ctlr_branch,
 138                               unsigned short *fw_on_ctlr_build,
 139                               u32 *init_connect_result);
 140 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);
 141 static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds);
 142 static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds);
 143 static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal);
 144 static int twa_reset_device_extension(TW_Device_Extension *tw_dev);
 145 static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset);
 146 static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id,
 147                                    unsigned char *cdb, int use_sg,
 148                                    TW_SG_Entry *sglistarg);
 149 static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id);
 150 static char *twa_string_lookup(twa_message_type *table, unsigned int aen_code);
 151
 152 /* Functions */
 153
 154 /* Show some statistics about the card */
 155 static ssize_t twa_show_stats(struct device *dev,
 156                               struct device_attribute *attr, char *buf)
 157 {
 158         struct Scsi_Host *host = class_to_shost(dev);
 159         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
 160         unsigned long flags = 0;
 161         ssize_t len;
 162
 163         spin_lock_irqsave(tw_dev->host->host_lock, flags);
 164         len = snprintf(buf, PAGE_SIZE, "3w-9xxx Driver version: %s\n"
 165                        "Current commands posted:   %4d\n"
 166                        "Max commands posted:       %4d\n"
 167                        "Current pending commands:  %4d\n"
 168                        "Max pending commands:      %4d\n"
 169                        "Last sgl length:           %4d\n"
 170                        "Max sgl length:            %4d\n"
 171                        "Last sector count:         %4d\n"
 172                        "Max sector count:          %4d\n"
 173                        "SCSI Host Resets:          %4d\n"
 174                        "AEN's:                     %4d\n",
 175                        TW_DRIVER_VERSION,
 176                        tw_dev->posted_request_count,
 177                        tw_dev->max_posted_request_count,
 178                        tw_dev->pending_request_count,
 179                        tw_dev->max_pending_request_count,
 180                        tw_dev->sgl_entries,
 181                        tw_dev->max_sgl_entries,
 182                        tw_dev->sector_count,
 183                        tw_dev->max_sector_count,
 184                        tw_dev->num_resets,
 185                        tw_dev->aen_count);
 186         spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 187         return len;
 188 } /* End twa_show_stats() */
 189
 190 /* Create sysfs 'stats' entry */
 191 static struct device_attribute twa_host_stats_attr = {
 192         .attr = {
 193                 .name =         "stats",
 194                 .mode =         S_IRUGO,
 195         },
 196         .show = twa_show_stats
 197 };
 198
 199 /* Host attributes initializer */
 200 static struct attribute *twa_host_attrs[] = {
 201         &twa_host_stats_attr.attr,
 202         NULL,
 203 };
 204
 205 ATTRIBUTE_GROUPS(twa_host);
 206
 207 /* File operations struct for character device */
 208 static const struct file_operations twa_fops = {
 209         .owner          = THIS_MODULE,
 210         .unlocked_ioctl = twa_chrdev_ioctl,
 211         .open           = twa_chrdev_open,
 212         .release        = NULL,
 213         .llseek         = noop_llseek,
 214 };
 215
 216 /*
 217  * The controllers use an inline buffer instead of a mapped SGL for small,
 218  * single entry buffers.  Note that we treat a zero-length transfer like
 219  * a mapped SGL.
 220  */
 221 static bool twa_command_mapped(struct scsi_cmnd *cmd)
 222 {
 223         return scsi_sg_count(cmd) != 1 ||
 224                 scsi_bufflen(cmd) >= TW_MIN_SGL_LENGTH;
 225 }
 226
 227 /* This function will complete an aen request from the isr */
 228 static int twa_aen_complete(TW_Device_Extension *tw_dev, int request_id)
 229 {
 230         TW_Command_Full *full_command_packet;
 231         TW_Command *command_packet;
 232         TW_Command_Apache_Header *header;
 233         unsigned short aen;
 234         int retval = 1;
 235
 236         header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
 237         tw_dev->posted_request_count--;
 238         aen = le16_to_cpu(header->status_block.error);
 239         full_command_packet = tw_dev->command_packet_virt[request_id];
 240         command_packet = &full_command_packet->command.oldcommand;
 241
 242         /* First check for internal completion of set param for time sync */
 243         if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) {
 244                 /* Keep reading the queue in case there are more aen's */
 245                 if (twa_aen_read_queue(tw_dev, request_id))
 246                         goto out2;
 247                 else {
 248                         retval = 0;
 249                         goto out;
 250                 }
 251         }
 252
 253         switch (aen) {
 254         case TW_AEN_QUEUE_EMPTY:
 255                 /* Quit reading the queue if this is the last one */
 256                 break;
 257         case TW_AEN_SYNC_TIME_WITH_HOST:
 258                 twa_aen_sync_time(tw_dev, request_id);
 259                 retval = 0;
 260                 goto out;
 261         default:
 262                 twa_aen_queue_event(tw_dev, header);
 263
 264                 /* If there are more aen's, keep reading the queue */
 265                 if (twa_aen_read_queue(tw_dev, request_id))
 266                         goto out2;
 267                 else {
 268                         retval = 0;
 269                         goto out;
 270                 }
 271         }
 272         retval = 0;
 273 out2:
 274         tw_dev->state[request_id] = TW_S_COMPLETED;
 275         twa_free_request_id(tw_dev, request_id);
 276         clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
 277 out:
 278         return retval;
 279 } /* End twa_aen_complete() */
 280
 281 /* This function will drain aen queue */
 282 static int twa_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
 283 {
 284         int request_id = 0;
 285         unsigned char cdb[TW_MAX_CDB_LEN];
 286         TW_SG_Entry sglist[1];
 287         int finished = 0, count = 0;
 288         TW_Command_Full *full_command_packet;
 289         TW_Command_Apache_Header *header;
 290         unsigned short aen;
 291         int first_reset = 0, queue = 0, retval = 1;
 292
 293         if (no_check_reset)
 294                 first_reset = 0;
 295         else
 296                 first_reset = 1;
 297
 298         full_command_packet = tw_dev->command_packet_virt[request_id];
 299         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 300
 301         /* Initialize cdb */
 302         memset(&cdb, 0, TW_MAX_CDB_LEN);
 303         cdb[0] = REQUEST_SENSE; /* opcode */
 304         cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
 305
 306         /* Initialize sglist */
 307         memset(&sglist, 0, sizeof(TW_SG_Entry));
 308         sglist[0].length = cpu_to_le32(TW_SECTOR_SIZE);
 309         sglist[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
 310
 311         if (tw_dev->generic_buffer_phys[request_id] & TW_ALIGNMENT_9000_SGL) {
 312                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Found unaligned address during AEN drain");
 313                 goto out;
 314         }
 315
 316         /* Mark internal command */
 317         tw_dev->srb[request_id] = NULL;
 318
 319         do {
 320                 /* Send command to the board */
 321                 if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
 322                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Error posting request sense");
 323                         goto out;
 324                 }
 325
 326                 /* Now poll for completion */
 327                 if (twa_poll_response(tw_dev, request_id, 30)) {
 328                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "No valid response while draining AEN queue");
 329                         tw_dev->posted_request_count--;
 330                         goto out;
 331                 }
 332
 333                 tw_dev->posted_request_count--;
 334                 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
 335                 aen = le16_to_cpu(header->status_block.error);
 336                 queue = 0;
 337                 count++;
 338
 339                 switch (aen) {
 340                 case TW_AEN_QUEUE_EMPTY:
 341                         if (first_reset != 1)
 342                                 goto out;
 343                         else
 344                                 finished = 1;
 345                         break;
 346                 case TW_AEN_SOFT_RESET:
 347                         if (first_reset == 0)
 348                                 first_reset = 1;
 349                         else
 350                                 queue = 1;
 351                         break;
 352                 case TW_AEN_SYNC_TIME_WITH_HOST:
 353                         break;
 354                 default:
 355                         queue = 1;
 356                 }
 357
 358                 /* Now queue an event info */
 359                 if (queue)
 360                         twa_aen_queue_event(tw_dev, header);
 361         } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN));
 362
 363         if (count == TW_MAX_AEN_DRAIN)
 364                 goto out;
 365
 366         retval = 0;
 367 out:
 368         tw_dev->state[request_id] = TW_S_INITIAL;
 369         return retval;
 370 } /* End twa_aen_drain_queue() */
 371
 372 /* This function will queue an event */
 373 static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
 374 {
 375         u32 local_time;
 376         TW_Event *event;
 377         unsigned short aen;
 378         char host[16];
 379         char *error_str;
 380
 381         tw_dev->aen_count++;
 382
 383         /* Fill out event info */
 384         event = tw_dev->event_queue[tw_dev->error_index];
 385
 386         /* Check for clobber */
 387         host[0] = '\0';
 388         if (tw_dev->host) {
 389                 sprintf(host, " scsi%d:", tw_dev->host->host_no);
 390                 if (event->retrieved == TW_AEN_NOT_RETRIEVED)
 391                         tw_dev->aen_clobber = 1;
 392         }
 393
 394         aen = le16_to_cpu(header->status_block.error);
 395         memset(event, 0, sizeof(TW_Event));
 396
 397         event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
 398         /* event->time_stamp_sec overflows in y2106 */
 399         local_time = (u32)(ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60));
 400         event->time_stamp_sec = local_time;
 401         event->aen_code = aen;
 402         event->retrieved = TW_AEN_NOT_RETRIEVED;
 403         event->sequence_id = tw_dev->error_sequence_id;
 404         tw_dev->error_sequence_id++;
 405
 406         /* Check for embedded error string */
 407         error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]);
 408
 409         header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0';
 410         event->parameter_len = strlen(header->err_specific_desc);
 411         memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + (error_str[0] == '\0' ? 0 : (1 + strlen(error_str))));
 412         if (event->severity != TW_AEN_SEVERITY_DEBUG)
 413                 printk(KERN_WARNING "3w-9xxx:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
 414                        host,
 415                        twa_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
 416                        TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen,
 417                        error_str[0] == '\0' ? twa_string_lookup(twa_aen_table, aen) : error_str,
 418                        header->err_specific_desc);
 419         else
 420                 tw_dev->aen_count--;
 421
 422         if ((tw_dev->error_index + 1) == TW_Q_LENGTH)
 423                 tw_dev->event_queue_wrapped = 1;
 424         tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
 425 } /* End twa_aen_queue_event() */
 426
 427 /* This function will read the aen queue from the isr */
 428 static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
 429 {
 430         unsigned char cdb[TW_MAX_CDB_LEN];
 431         TW_SG_Entry sglist[1];
 432         TW_Command_Full *full_command_packet;
 433         int retval = 1;
 434
 435         full_command_packet = tw_dev->command_packet_virt[request_id];
 436         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 437
 438         /* Initialize cdb */
 439         memset(&cdb, 0, TW_MAX_CDB_LEN);
 440         cdb[0] = REQUEST_SENSE; /* opcode */
 441         cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
 442
 443         /* Initialize sglist */
 444         memset(&sglist, 0, sizeof(TW_SG_Entry));
 445         sglist[0].length = cpu_to_le32(TW_SECTOR_SIZE);
 446         sglist[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
 447
 448         /* Mark internal command */
 449         tw_dev->srb[request_id] = NULL;
 450
 451         /* Now post the command packet */
 452         if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
 453                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "Post failed while reading AEN queue");
 454                 goto out;
 455         }
 456         retval = 0;
 457 out:
 458         return retval;
 459 } /* End twa_aen_read_queue() */
 460
 461 /* This function will look up an AEN severity string */
 462 static char *twa_aen_severity_lookup(unsigned char severity_code)
 463 {
 464         char *retval = NULL;
 465
 466         if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) ||
 467             (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG))
 468                 goto out;
 469
 470         retval = twa_aen_severity_table[severity_code];
 471 out:
 472         return retval;
 473 } /* End twa_aen_severity_lookup() */
 474
 475 /* This function will sync firmware time with the host time */
 476 static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
 477 {
 478         u32 schedulertime;
 479         TW_Command_Full *full_command_packet;
 480         TW_Command *command_packet;
 481         TW_Param_Apache *param;
 482         time64_t local_time;
 483
 484         /* Fill out the command packet */
 485         full_command_packet = tw_dev->command_packet_virt[request_id];
 486         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 487         command_packet = &full_command_packet->command.oldcommand;
 488         command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
 489         command_packet->request_id = request_id;
 490         command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
 491         command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
 492         command_packet->size = TW_COMMAND_SIZE;
 493         command_packet->byte6_offset.parameter_count = cpu_to_le16(1);
 494
 495         /* Setup the param */
 496         param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
 497         memset(param, 0, TW_SECTOR_SIZE);
 498         param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */
 499         param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
 500         param->parameter_size_bytes = cpu_to_le16(4);
 501
 502         /* Convert system time in UTC to local time seconds since last
 503            Sunday 12:00AM */
 504         local_time = (ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60));
 505         div_u64_rem(local_time - (3 * 86400), 604800, &schedulertime);
 506
 507         memcpy(param->data, &(__le32){cpu_to_le32(schedulertime)}, sizeof(__le32));
 508
 509         /* Mark internal command */
 510         tw_dev->srb[request_id] = NULL;
 511
 512         /* Now post the command */
 513         twa_post_command_packet(tw_dev, request_id, 1);
 514 } /* End twa_aen_sync_time() */
 515
 516 /* This function will allocate memory and check if it is correctly aligned */
 517 static int twa_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
 518 {
 519         int i;
 520         dma_addr_t dma_handle;
 521         unsigned long *cpu_addr;
 522         int retval = 1;
 523
 524         cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev,
 525                         size * TW_Q_LENGTH, &dma_handle, GFP_KERNEL);
 526         if (!cpu_addr) {
 527                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
 528                 goto out;
 529         }
 530
 531         if ((unsigned long)cpu_addr % (TW_ALIGNMENT_9000)) {
 532                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x6, "Failed to allocate correctly aligned memory");
 533                 dma_free_coherent(&tw_dev->tw_pci_dev->dev, size * TW_Q_LENGTH,
 534                                 cpu_addr, dma_handle);
 535                 goto out;
 536         }
 537
 538         memset(cpu_addr, 0, size*TW_Q_LENGTH);
 539
 540         for (i = 0; i < TW_Q_LENGTH; i++) {
 541                 switch(which) {
 542                 case 0:
 543                         tw_dev->command_packet_phys[i] = dma_handle+(i*size);
 544                         tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size));
 545                         break;
 546                 case 1:
 547                         tw_dev->generic_buffer_phys[i] = dma_handle+(i*size);
 548                         tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
 549                         break;
 550                 }
 551         }
 552         retval = 0;
 553 out:
 554         return retval;
 555 } /* End twa_allocate_memory() */
 556
 557 /* This function will check the status register for unexpected bits */
 558 static int twa_check_bits(u32 status_reg_value)
 559 {
 560         int retval = 1;
 561
 562         if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS)
 563                 goto out;
 564         if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0)
 565                 goto out;
 566
 567         retval = 0;
 568 out:
 569         return retval;
 570 } /* End twa_check_bits() */
 571
 572 /* This function will check the srl and decide if we are compatible  */
 573 static int twa_check_srl(TW_Device_Extension *tw_dev, int *flashed)
 574 {
 575         int retval = 1;
 576         unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0;
 577         unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0;
 578         u32 init_connect_result = 0;
 579
 580         if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
 581                                TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
 582                                TW_9000_ARCH_ID, TW_CURRENT_DRIVER_BRANCH,
 583                                TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl,
 584                                &fw_on_ctlr_arch_id, &fw_on_ctlr_branch,
 585                                &fw_on_ctlr_build, &init_connect_result)) {
 586                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "Initconnection failed while checking SRL");
 587                 goto out;
 588         }
 589
 590         tw_dev->tw_compat_info.working_srl = fw_on_ctlr_srl;
 591         tw_dev->tw_compat_info.working_branch = fw_on_ctlr_branch;
 592         tw_dev->tw_compat_info.working_build = fw_on_ctlr_build;
 593
 594         /* Try base mode compatibility */
 595         if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
 596                 if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
 597                                        TW_EXTENDED_INIT_CONNECT,
 598                                        TW_BASE_FW_SRL, TW_9000_ARCH_ID,
 599                                        TW_BASE_FW_BRANCH, TW_BASE_FW_BUILD,
 600                                        &fw_on_ctlr_srl, &fw_on_ctlr_arch_id,
 601                                        &fw_on_ctlr_branch, &fw_on_ctlr_build,
 602                                        &init_connect_result)) {
 603                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Initconnection (base mode) failed while checking SRL");
 604                         goto out;
 605                 }
 606                 if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
 607                         if (TW_CURRENT_DRIVER_SRL > fw_on_ctlr_srl) {
 608                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x32, "Firmware and driver incompatibility: please upgrade firmware");
 609                         } else {
 610                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x33, "Firmware and driver incompatibility: please upgrade driver");
 611                         }
 612                         goto out;
 613                 }
 614                 tw_dev->tw_compat_info.working_srl = TW_BASE_FW_SRL;
 615                 tw_dev->tw_compat_info.working_branch = TW_BASE_FW_BRANCH;
 616                 tw_dev->tw_compat_info.working_build = TW_BASE_FW_BUILD;
 617         }
 618
 619         /* Load rest of compatibility struct */
 620         strlcpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION,
 621                 sizeof(tw_dev->tw_compat_info.driver_version));
 622         tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL;
 623         tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH;
 624         tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD;
 625         tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL;
 626         tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH;
 627         tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD;
 628         tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl;
 629         tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch;
 630         tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build;
 631
 632         retval = 0;
 633 out:
 634         return retval;
 635 } /* End twa_check_srl() */
 636
 637 /* This function handles ioctl for the character device */
 638 static long twa_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 639 {
 640         struct inode *inode = file_inode(file);
 641         long timeout;
 642         unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
 643         dma_addr_t dma_handle;
 644         int request_id = 0;
 645         unsigned int sequence_id = 0;
 646         unsigned char event_index, start_index;
 647         TW_Ioctl_Driver_Command driver_command;
 648         TW_Ioctl_Buf_Apache *tw_ioctl;
 649         TW_Lock *tw_lock;
 650         TW_Command_Full *full_command_packet;
 651         TW_Compatibility_Info *tw_compat_info;
 652         TW_Event *event;
 653         ktime_t current_time;
 654         TW_Device_Extension *tw_dev = twa_device_extension_list[iminor(inode)];
 655         int retval = TW_IOCTL_ERROR_OS_EFAULT;
 656         void __user *argp = (void __user *)arg;
 657
 658         mutex_lock(&twa_chrdev_mutex);
 659
 660         /* Only let one of these through at a time */
 661         if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
 662                 retval = TW_IOCTL_ERROR_OS_EINTR;
 663                 goto out;
 664         }
 665
 666         /* First copy down the driver command */
 667         if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command)))
 668                 goto out2;
 669
 670         /* Check data buffer size */
 671         if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) {
 672                 retval = TW_IOCTL_ERROR_OS_EINVAL;
 673                 goto out2;
 674         }
 675
 676         /* Hardware can only do multiple of 512 byte transfers */
 677         data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511;
 678
 679         /* Now allocate ioctl buf memory */
 680         cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev,
 681                                       sizeof(TW_Ioctl_Buf_Apache) + data_buffer_length_adjusted,
 682                                       &dma_handle, GFP_KERNEL);
 683         if (!cpu_addr) {
 684                 retval = TW_IOCTL_ERROR_OS_ENOMEM;
 685                 goto out2;
 686         }
 687
 688         tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
 689
 690         /* Now copy down the entire ioctl */
 691         if (copy_from_user(tw_ioctl, argp, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length))
 692                 goto out3;
 693
 694         /* See which ioctl we are doing */
 695         switch (cmd) {
 696         case TW_IOCTL_FIRMWARE_PASS_THROUGH:
 697                 spin_lock_irqsave(tw_dev->host->host_lock, flags);
 698                 twa_get_request_id(tw_dev, &request_id);
 699
 700                 /* Flag internal command */
 701                 tw_dev->srb[request_id] = NULL;
 702
 703                 /* Flag chrdev ioctl */
 704                 tw_dev->chrdev_request_id = request_id;
 705
 706                 full_command_packet = &tw_ioctl->firmware_command;
 707
 708                 /* Load request id and sglist for both command types */
 709                 twa_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted);
 710
 711                 memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full));
 712
 713                 /* Now post the command packet to the controller */
 714                 twa_post_command_packet(tw_dev, request_id, 1);
 715                 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 716
 717                 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
 718
 719                 /* Now wait for command to complete */
 720                 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
 721
 722                 /* We timed out, and didn't get an interrupt */
 723                 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
 724                         /* Now we need to reset the board */
 725                         printk(KERN_WARNING "3w-9xxx: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
 726                                tw_dev->host->host_no, TW_DRIVER, 0x37,
 727                                cmd);
 728                         retval = TW_IOCTL_ERROR_OS_EIO;
 729                         twa_reset_device_extension(tw_dev);
 730                         goto out3;
 731                 }
 732
 733                 /* Now copy in the command packet response */
 734                 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full));
 735
 736                 /* Now complete the io */
 737                 spin_lock_irqsave(tw_dev->host->host_lock, flags);
 738                 tw_dev->posted_request_count--;
 739                 tw_dev->state[request_id] = TW_S_COMPLETED;
 740                 twa_free_request_id(tw_dev, request_id);
 741                 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 742                 break;
 743         case TW_IOCTL_GET_COMPATIBILITY_INFO:
 744                 tw_ioctl->driver_command.status = 0;
 745                 /* Copy compatibility struct into ioctl data buffer */
 746                 tw_compat_info = (TW_Compatibility_Info *)tw_ioctl->data_buffer;
 747                 memcpy(tw_compat_info, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info));
 748                 break;
 749         case TW_IOCTL_GET_LAST_EVENT:
 750                 if (tw_dev->event_queue_wrapped) {
 751                         if (tw_dev->aen_clobber) {
 752                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 753                                 tw_dev->aen_clobber = 0;
 754                         } else
 755                                 tw_ioctl->driver_command.status = 0;
 756                 } else {
 757                         if (!tw_dev->error_index) {
 758                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 759                                 break;
 760                         }
 761                         tw_ioctl->driver_command.status = 0;
 762                 }
 763                 event_index = (tw_dev->error_index - 1 + TW_Q_LENGTH) % TW_Q_LENGTH;
 764                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 765                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 766                 break;
 767         case TW_IOCTL_GET_FIRST_EVENT:
 768                 if (tw_dev->event_queue_wrapped) {
 769                         if (tw_dev->aen_clobber) {
 770                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 771                                 tw_dev->aen_clobber = 0;
 772                         } else
 773                                 tw_ioctl->driver_command.status = 0;
 774                         event_index = tw_dev->error_index;
 775                 } else {
 776                         if (!tw_dev->error_index) {
 777                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 778                                 break;
 779                         }
 780                         tw_ioctl->driver_command.status = 0;
 781                         event_index = 0;
 782                 }
 783                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 784                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 785                 break;
 786         case TW_IOCTL_GET_NEXT_EVENT:
 787                 event = (TW_Event *)tw_ioctl->data_buffer;
 788                 sequence_id = event->sequence_id;
 789                 tw_ioctl->driver_command.status = 0;
 790
 791                 if (tw_dev->event_queue_wrapped) {
 792                         if (tw_dev->aen_clobber) {
 793                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 794                                 tw_dev->aen_clobber = 0;
 795                         }
 796                         start_index = tw_dev->error_index;
 797                 } else {
 798                         if (!tw_dev->error_index) {
 799                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 800                                 break;
 801                         }
 802                         start_index = 0;
 803                 }
 804                 event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id + 1) % TW_Q_LENGTH;
 805
 806                 if (!(tw_dev->event_queue[event_index]->sequence_id > sequence_id)) {
 807                         if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
 808                                 tw_dev->aen_clobber = 1;
 809                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 810                         break;
 811                 }
 812                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 813                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 814                 break;
 815         case TW_IOCTL_GET_PREVIOUS_EVENT:
 816                 event = (TW_Event *)tw_ioctl->data_buffer;
 817                 sequence_id = event->sequence_id;
 818                 tw_ioctl->driver_command.status = 0;
 819
 820                 if (tw_dev->event_queue_wrapped) {
 821                         if (tw_dev->aen_clobber) {
 822                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 823                                 tw_dev->aen_clobber = 0;
 824                         }
 825                         start_index = tw_dev->error_index;
 826                 } else {
 827                         if (!tw_dev->error_index) {
 828                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 829                                 break;
 830                         }
 831                         start_index = 0;
 832                 }
 833                 event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id - 1) % TW_Q_LENGTH;
 834
 835                 if (!(tw_dev->event_queue[event_index]->sequence_id < sequence_id)) {
 836                         if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
 837                                 tw_dev->aen_clobber = 1;
 838                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 839                         break;
 840                 }
 841                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 842                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 843                 break;
 844         case TW_IOCTL_GET_LOCK:
 845                 tw_lock = (TW_Lock *)tw_ioctl->data_buffer;
 846                 current_time = ktime_get();
 847
 848                 if ((tw_lock->force_flag == 1) || (tw_dev->ioctl_sem_lock == 0) ||
 849                     ktime_after(current_time, tw_dev->ioctl_time)) {
 850                         tw_dev->ioctl_sem_lock = 1;
 851                         tw_dev->ioctl_time = ktime_add_ms(current_time, tw_lock->timeout_msec);
 852                         tw_ioctl->driver_command.status = 0;
 853                         tw_lock->time_remaining_msec = tw_lock->timeout_msec;
 854                 } else {
 855                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_LOCKED;
 856                         tw_lock->time_remaining_msec = ktime_ms_delta(tw_dev->ioctl_time, current_time);
 857                 }
 858                 break;
 859         case TW_IOCTL_RELEASE_LOCK:
 860                 if (tw_dev->ioctl_sem_lock == 1) {
 861                         tw_dev->ioctl_sem_lock = 0;
 862                         tw_ioctl->driver_command.status = 0;
 863                 } else {
 864                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NOT_LOCKED;
 865                 }
 866                 break;
 867         default:
 868                 retval = TW_IOCTL_ERROR_OS_ENOTTY;
 869                 goto out3;
 870         }
 871
 872         /* Now copy the entire response to userspace */
 873         if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length) == 0)
 874                 retval = 0;
 875 out3:
 876         /* Now free ioctl buf memory */
 877         dma_free_coherent(&tw_dev->tw_pci_dev->dev,
 878                           sizeof(TW_Ioctl_Buf_Apache) + data_buffer_length_adjusted,
 879                           cpu_addr, dma_handle);
 880 out2:
 881         mutex_unlock(&tw_dev->ioctl_lock);
 882 out:
 883         mutex_unlock(&twa_chrdev_mutex);
 884         return retval;
 885 } /* End twa_chrdev_ioctl() */
 886
 887 /* This function handles open for the character device */
 888 /* NOTE that this function will race with remove. */
 889 static int twa_chrdev_open(struct inode *inode, struct file *file)
 890 {
 891         unsigned int minor_number;
 892         int retval = TW_IOCTL_ERROR_OS_ENODEV;
 893
 894         if (!capable(CAP_SYS_ADMIN)) {
 895                 retval = -EACCES;
 896                 goto out;
 897         }
 898
 899         minor_number = iminor(inode);
 900         if (minor_number >= twa_device_extension_count)
 901                 goto out;
 902         retval = 0;
 903 out:
 904         return retval;
 905 } /* End twa_chrdev_open() */
 906
 907 /* This function will print readable messages from status register errors */
 908 static int twa_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value)
 909 {
 910         int retval = 1;
 911
 912         /* Check for various error conditions and handle them appropriately */
 913         if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
 914                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "PCI Parity Error: clearing");
 915                 writel(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
 916         }
 917
 918         if (status_reg_value & TW_STATUS_PCI_ABORT) {
 919                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "PCI Abort: clearing");
 920                 writel(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
 921                 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
 922         }
 923
 924         if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
 925                 if (((tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9650SE) &&
 926                      (tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9690SA)) ||
 927                     (!test_bit(TW_IN_RESET, &tw_dev->flags)))
 928                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Controller Queue Error: clearing");
 929                 writel(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
 930         }
 931
 932         if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
 933                 if (tw_dev->reset_print == 0) {
 934                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Microcontroller Error: clearing");
 935                         tw_dev->reset_print = 1;
 936                 }
 937                 goto out;
 938         }
 939         retval = 0;
 940 out:
 941         return retval;
 942 } /* End twa_decode_bits() */
 943
 944 /* This function will empty the response queue */
 945 static int twa_empty_response_queue(TW_Device_Extension *tw_dev)
 946 {
 947         u32 status_reg_value;
 948         int count = 0, retval = 1;
 949
 950         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
 951
 952         while (((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) && (count < TW_MAX_RESPONSE_DRAIN)) {
 953                 readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
 954                 status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
 955                 count++;
 956         }
 957         if (count == TW_MAX_RESPONSE_DRAIN)
 958                 goto out;
 959
 960         retval = 0;
 961 out:
 962         return retval;
 963 } /* End twa_empty_response_queue() */
 964
 965 /* This function will clear the pchip/response queue on 9550SX */
 966 static int twa_empty_response_queue_large(TW_Device_Extension *tw_dev)
 967 {
 968         u32 response_que_value = 0;
 969         unsigned long before;
 970         int retval = 1;
 971
 972         if (tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9000) {
 973                 before = jiffies;
 974                 while ((response_que_value & TW_9550SX_DRAIN_COMPLETED) != TW_9550SX_DRAIN_COMPLETED) {
 975                         response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR_LARGE(tw_dev));
 976                         msleep(1);
 977                         if (time_after(jiffies, before + HZ * 30))
 978                                 goto out;
 979                 }
 980                 /* P-chip settle time */
 981                 msleep(500);
 982                 retval = 0;
 983         } else
 984                 retval = 0;
 985 out:
 986         return retval;
 987 } /* End twa_empty_response_queue_large() */
 988
 989 /* This function passes sense keys from firmware to scsi layer */
 990 static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host)
 991 {
 992         TW_Command_Full *full_command_packet;
 993         unsigned short error;
 994         int retval = 1;
 995         char *error_str;
 996
 997         full_command_packet = tw_dev->command_packet_virt[request_id];
 998
 999         /* Check for embedded error string */
1000         error_str = &(full_command_packet->header.err_specific_desc[strlen(full_command_packet->header.err_specific_desc) + 1]);
1001
1002         /* Don't print error for Logical unit not supported during rollcall */
1003         error = le16_to_cpu(full_command_packet->header.status_block.error);
1004         if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE)) {
1005                 if (print_host)
1006                         printk(KERN_WARNING "3w-9xxx: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
1007                                tw_dev->host->host_no,
1008                                TW_MESSAGE_SOURCE_CONTROLLER_ERROR, error,
1009                                error_str[0] ? error_str : twa_string_lookup(twa_error_table, error),
1010                                full_command_packet->header.err_specific_desc);
1011                 else
1012                         printk(KERN_WARNING "3w-9xxx: ERROR: (0x%02X:0x%04X): %s:%s.\n",
1013                                TW_MESSAGE_SOURCE_CONTROLLER_ERROR, error,
1014                                error_str[0] ? error_str : twa_string_lookup(twa_error_table, error),
1015                                full_command_packet->header.err_specific_desc);
1016         }
1017
1018         if (copy_sense) {
1019                 memcpy(tw_dev->srb[request_id]->sense_buffer, full_command_packet->header.sense_data, TW_SENSE_DATA_LENGTH);
1020                 tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
1021                 retval = TW_ISR_DONT_RESULT;
1022                 goto out;
1023         }
1024         retval = 0;
1025 out:
1026         return retval;
1027 } /* End twa_fill_sense() */
1028
1029 /* This function will free up device extension resources */
1030 static void twa_free_device_extension(TW_Device_Extension *tw_dev)
1031 {
1032         if (tw_dev->command_packet_virt[0])
1033                 dma_free_coherent(&tw_dev->tw_pci_dev->dev,
1034                                 sizeof(TW_Command_Full) * TW_Q_LENGTH,
1035                                 tw_dev->command_packet_virt[0],
1036                                 tw_dev->command_packet_phys[0]);
1037
1038         if (tw_dev->generic_buffer_virt[0])
1039                 dma_free_coherent(&tw_dev->tw_pci_dev->dev,
1040                                 TW_SECTOR_SIZE * TW_Q_LENGTH,
1041                                 tw_dev->generic_buffer_virt[0],
1042                                 tw_dev->generic_buffer_phys[0]);
1043
1044         kfree(tw_dev->event_queue[0]);
1045 } /* End twa_free_device_extension() */
1046
1047 /* This function will free a request id */
1048 static void twa_free_request_id(TW_Device_Extension *tw_dev, int request_id)
1049 {
1050         tw_dev->free_queue[tw_dev->free_tail] = request_id;
1051         tw_dev->state[request_id] = TW_S_FINISHED;
1052         tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
1053 } /* End twa_free_request_id() */
1054
1055 /* This function will get parameter table entries from the firmware */
1056 static void *twa_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes)
1057 {
1058         TW_Command_Full *full_command_packet;
1059         TW_Command *command_packet;
1060         TW_Param_Apache *param;
1061         void *retval = NULL;
1062
1063         /* Setup the command packet */
1064         full_command_packet = tw_dev->command_packet_virt[request_id];
1065         memset(full_command_packet, 0, sizeof(TW_Command_Full));
1066         command_packet = &full_command_packet->command.oldcommand;
1067
1068         command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1069         command_packet->size              = TW_COMMAND_SIZE;
1070         command_packet->request_id        = request_id;
1071         command_packet->byte6_offset.block_count = cpu_to_le16(1);
1072
1073         /* Now setup the param */
1074         param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
1075         memset(param, 0, TW_SECTOR_SIZE);
1076         param->table_id = cpu_to_le16(table_id | 0x8000);
1077         param->parameter_id = cpu_to_le16(parameter_id);
1078         param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes);
1079
1080         command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
1081         command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
1082
1083         /* Post the command packet to the board */
1084         twa_post_command_packet(tw_dev, request_id, 1);
1085
1086         /* Poll for completion */
1087         if (twa_poll_response(tw_dev, request_id, 30))
1088                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "No valid response during get param")
1089         else
1090                 retval = (void *)&(param->data[0]);
1091
1092         tw_dev->posted_request_count--;
1093         tw_dev->state[request_id] = TW_S_INITIAL;
1094
1095         return retval;
1096 } /* End twa_get_param() */
1097
1098 /* This function will assign an available request id */
1099 static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id)
1100 {
1101         *request_id = tw_dev->free_queue[tw_dev->free_head];
1102         tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
1103         tw_dev->state[*request_id] = TW_S_STARTED;
1104 } /* End twa_get_request_id() */
1105
1106 /* This function will send an initconnection command to controller */
1107 static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
1108                               u32 set_features, unsigned short current_fw_srl,
1109                               unsigned short current_fw_arch_id,
1110                               unsigned short current_fw_branch,
1111                               unsigned short current_fw_build,
1112                               unsigned short *fw_on_ctlr_srl,
1113                               unsigned short *fw_on_ctlr_arch_id,
1114                               unsigned short *fw_on_ctlr_branch,
1115                               unsigned short *fw_on_ctlr_build,
1116                               u32 *init_connect_result)
1117 {
1118         TW_Command_Full *full_command_packet;
1119         TW_Initconnect *tw_initconnect;
1120         int request_id = 0, retval = 1;
1121
1122         /* Initialize InitConnection command packet */
1123         full_command_packet = tw_dev->command_packet_virt[request_id];
1124         memset(full_command_packet, 0, sizeof(TW_Command_Full));
1125         full_command_packet->header.header_desc.size_header = 128;
1126
1127         tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand;
1128         tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION);
1129         tw_initconnect->request_id = request_id;
1130         tw_initconnect->message_credits = cpu_to_le16(message_credits);
1131
1132         /* Turn on 64-bit sgl support if we need to */
1133         set_features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
1134
1135         tw_initconnect->features = cpu_to_le32(set_features);
1136
1137         if (set_features & TW_EXTENDED_INIT_CONNECT) {
1138                 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED;
1139                 tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl);
1140                 tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id);
1141                 tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch);
1142                 tw_initconnect->fw_build = cpu_to_le16(current_fw_build);
1143         } else
1144                 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE;
1145
1146         /* Send command packet to the board */
1147         twa_post_command_packet(tw_dev, request_id, 1);
1148
1149         /* Poll for completion */
1150         if (twa_poll_response(tw_dev, request_id, 30)) {
1151                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "No valid response during init connection");
1152         } else {
1153                 if (set_features & TW_EXTENDED_INIT_CONNECT) {
1154                         *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl);
1155                         *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id);
1156                         *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch);
1157                         *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build);
1158                         *init_connect_result = le32_to_cpu(tw_initconnect->result);
1159                 }
1160                 retval = 0;
1161         }
1162
1163         tw_dev->posted_request_count--;
1164         tw_dev->state[request_id] = TW_S_INITIAL;
1165
1166         return retval;
1167 } /* End twa_initconnection() */
1168
1169 /* This function will initialize the fields of a device extension */
1170 static int twa_initialize_device_extension(TW_Device_Extension *tw_dev)
1171 {
1172         int i, retval = 1;
1173
1174         /* Initialize command packet buffers */
1175         if (twa_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
1176                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Command packet memory allocation failed");
1177                 goto out;
1178         }
1179
1180         /* Initialize generic buffer */
1181         if (twa_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
1182                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x17, "Generic memory allocation failed");
1183                 goto out;
1184         }
1185
1186         /* Allocate event info space */
1187         tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL);
1188         if (!tw_dev->event_queue[0]) {
1189                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x18, "Event info memory allocation failed");
1190                 goto out;
1191         }
1192
1193
1194         for (i = 0; i < TW_Q_LENGTH; i++) {
1195                 tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event)));
1196                 tw_dev->free_queue[i] = i;
1197                 tw_dev->state[i] = TW_S_INITIAL;
1198         }
1199
1200         tw_dev->pending_head = TW_Q_START;
1201         tw_dev->pending_tail = TW_Q_START;
1202         tw_dev->free_head = TW_Q_START;
1203         tw_dev->free_tail = TW_Q_START;
1204         tw_dev->error_sequence_id = 1;
1205         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1206
1207         mutex_init(&tw_dev->ioctl_lock);
1208         init_waitqueue_head(&tw_dev->ioctl_wqueue);
1209
1210         retval = 0;
1211 out:
1212         return retval;
1213 } /* End twa_initialize_device_extension() */
1214
1215 /* This function is the interrupt service routine */
1216 static irqreturn_t twa_interrupt(int irq, void *dev_instance)
1217 {
1218         int request_id, error = 0;
1219         u32 status_reg_value;
1220         TW_Response_Queue response_que;
1221         TW_Command_Full *full_command_packet;
1222         TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
1223         int handled = 0;
1224
1225         /* Get the per adapter lock */
1226         spin_lock(tw_dev->host->host_lock);
1227
1228         /* Read the registers */
1229         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1230
1231         /* Check if this is our interrupt, otherwise bail */
1232         if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
1233                 goto twa_interrupt_bail;
1234
1235         handled = 1;
1236
1237         /* If we are resetting, bail */
1238         if (test_bit(TW_IN_RESET, &tw_dev->flags))
1239                 goto twa_interrupt_bail;
1240
1241         /* Check controller for errors */
1242         if (twa_check_bits(status_reg_value)) {
1243                 if (twa_decode_bits(tw_dev, status_reg_value)) {
1244                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1245                         goto twa_interrupt_bail;
1246                 }
1247         }
1248
1249         /* Handle host interrupt */
1250         if (status_reg_value & TW_STATUS_HOST_INTERRUPT)
1251                 TW_CLEAR_HOST_INTERRUPT(tw_dev);
1252
1253         /* Handle attention interrupt */
1254         if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
1255                 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
1256                 if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
1257                         twa_get_request_id(tw_dev, &request_id);
1258
1259                         error = twa_aen_read_queue(tw_dev, request_id);
1260                         if (error) {
1261                                 tw_dev->state[request_id] = TW_S_COMPLETED;
1262                                 twa_free_request_id(tw_dev, request_id);
1263                                 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
1264                         }
1265                 }
1266         }
1267
1268         /* Handle command interrupt */
1269         if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
1270                 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1271                 /* Drain as many pending commands as we can */
1272                 while (tw_dev->pending_request_count > 0) {
1273                         request_id = tw_dev->pending_queue[tw_dev->pending_head];
1274                         if (tw_dev->state[request_id] != TW_S_PENDING) {
1275                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x19, "Found request id that wasn't pending");
1276                                 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1277                                 goto twa_interrupt_bail;
1278                         }
1279                         if (twa_post_command_packet(tw_dev, request_id, 1)==0) {
1280                                 tw_dev->pending_head = (tw_dev->pending_head + 1) % TW_Q_LENGTH;
1281                                 tw_dev->pending_request_count--;
1282                         } else {
1283                                 /* If we get here, we will continue re-posting on the next command interrupt */
1284                                 break;
1285                         }
1286                 }
1287         }
1288
1289         /* Handle response interrupt */
1290         if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
1291
1292                 /* Drain the response queue from the board */
1293                 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
1294                         /* Complete the response */
1295                         response_que.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1296                         request_id = TW_RESID_OUT(response_que.response_id);
1297                         full_command_packet = tw_dev->command_packet_virt[request_id];
1298                         error = 0;
1299                         /* Check for command packet errors */
1300                         if (full_command_packet->command.newcommand.status != 0) {
1301                                 if (tw_dev->srb[request_id] != NULL) {
1302                                         error = twa_fill_sense(tw_dev, request_id, 1, 1);
1303                                 } else {
1304                                         /* Skip ioctl error prints */
1305                                         if (request_id != tw_dev->chrdev_request_id) {
1306                                                 error = twa_fill_sense(tw_dev, request_id, 0, 1);
1307                                         }
1308                                 }
1309                         }
1310
1311                         /* Check for correct state */
1312                         if (tw_dev->state[request_id] != TW_S_POSTED) {
1313                                 if (tw_dev->srb[request_id] != NULL) {
1314                                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Received a request id that wasn't posted");
1315                                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1316                                         goto twa_interrupt_bail;
1317                                 }
1318                         }
1319
1320                         /* Check for internal command completion */
1321                         if (tw_dev->srb[request_id] == NULL) {
1322                                 if (request_id != tw_dev->chrdev_request_id) {
1323                                         if (twa_aen_complete(tw_dev, request_id))
1324                                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Error completing AEN during attention interrupt");
1325                                 } else {
1326                                         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1327                                         wake_up(&tw_dev->ioctl_wqueue);
1328                                 }
1329                         } else {
1330                                 struct scsi_cmnd *cmd;
1331
1332                                 cmd = tw_dev->srb[request_id];
1333
1334                                 twa_scsiop_execute_scsi_complete(tw_dev, request_id);
1335                                 /* If no error command was a success */
1336                                 if (error == 0) {
1337                                         cmd->result = (DID_OK << 16);
1338                                 }
1339
1340                                 /* If error, command failed */
1341                                 if (error == 1) {
1342                                         /* Ask for a host reset */
1343                                         cmd->result = (DID_OK << 16) | SAM_STAT_CHECK_CONDITION;
1344                                 }
1345
1346                                 /* Report residual bytes for single sgl */
1347                                 if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) {
1348                                         u32 length = le32_to_cpu(full_command_packet->command.newcommand.sg_list[0].length);
1349
1350                                         if (length < scsi_bufflen(cmd))
1351                                                 scsi_set_resid(cmd, scsi_bufflen(cmd) - length);
1352                                 }
1353
1354                                 /* Now complete the io */
1355                                 if (twa_command_mapped(cmd))
1356                                         scsi_dma_unmap(cmd);
1357                                 scsi_done(cmd);
1358                                 tw_dev->state[request_id] = TW_S_COMPLETED;
1359                                 twa_free_request_id(tw_dev, request_id);
1360                                 tw_dev->posted_request_count--;
1361                         }
1362
1363                         /* Check for valid status after each drain */
1364                         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1365                         if (twa_check_bits(status_reg_value)) {
1366                                 if (twa_decode_bits(tw_dev, status_reg_value)) {
1367                                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1368                                         goto twa_interrupt_bail;
1369                                 }
1370                         }
1371                 }
1372         }
1373
1374 twa_interrupt_bail:
1375         spin_unlock(tw_dev->host->host_lock);
1376         return IRQ_RETVAL(handled);
1377 } /* End twa_interrupt() */
1378
1379 /* This function will load the request id and various sgls for ioctls */
1380 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)
1381 {
1382         TW_Command *oldcommand;
1383         TW_Command_Apache *newcommand;
1384         TW_SG_Entry *sgl;
1385         unsigned int pae = 0;
1386
1387         if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4))
1388                 pae = 1;
1389
1390         if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
1391                 newcommand = &full_command_packet->command.newcommand;
1392                 newcommand->request_id__lunl =
1393                         TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id);
1394                 if (length) {
1395                         newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache));
1396                         newcommand->sg_list[0].length = cpu_to_le32(length);
1397                 }
1398                 newcommand->sgl_entries__lunh =
1399                         TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0);
1400         } else {
1401                 oldcommand = &full_command_packet->command.oldcommand;
1402                 oldcommand->request_id = request_id;
1403
1404                 if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
1405                         /* Load the sg list */
1406                         if (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)
1407                                 sgl = (TW_SG_Entry *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry)/4) + pae);
1408                         else
1409                                 sgl = (TW_SG_Entry *)((u32 *)oldcommand+TW_SGL_OUT(oldcommand->opcode__sgloffset));
1410                         sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache));
1411                         sgl->length = cpu_to_le32(length);
1412
1413                         oldcommand->size += pae;
1414                 }
1415         }
1416 } /* End twa_load_sgl() */
1417
1418 /* This function will poll for a response interrupt of a request */
1419 static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
1420 {
1421         int retval = 1, found = 0, response_request_id;
1422         TW_Response_Queue response_queue;
1423         TW_Command_Full *full_command_packet = tw_dev->command_packet_virt[request_id];
1424
1425         if (twa_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, seconds) == 0) {
1426                 response_queue.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1427                 response_request_id = TW_RESID_OUT(response_queue.response_id);
1428                 if (request_id != response_request_id) {
1429                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "Found unexpected request id while polling for response");
1430                         goto out;
1431                 }
1432                 if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
1433                         if (full_command_packet->command.newcommand.status != 0) {
1434                                 /* bad response */
1435                                 twa_fill_sense(tw_dev, request_id, 0, 0);
1436                                 goto out;
1437                         }
1438                         found = 1;
1439                 } else {
1440                         if (full_command_packet->command.oldcommand.status != 0) {
1441                                 /* bad response */
1442                                 twa_fill_sense(tw_dev, request_id, 0, 0);
1443                                 goto out;
1444                         }
1445                         found = 1;
1446                 }
1447         }
1448
1449         if (found)
1450                 retval = 0;
1451 out:
1452         return retval;
1453 } /* End twa_poll_response() */
1454
1455 /* This function will poll the status register for a flag */
1456 static int twa_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
1457 {
1458         u32 status_reg_value;
1459         unsigned long before;
1460         int retval = 1;
1461
1462         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1463         before = jiffies;
1464
1465         if (twa_check_bits(status_reg_value))
1466                 twa_decode_bits(tw_dev, status_reg_value);
1467
1468         while ((status_reg_value & flag) != flag) {
1469                 status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1470
1471                 if (twa_check_bits(status_reg_value))
1472                         twa_decode_bits(tw_dev, status_reg_value);
1473
1474                 if (time_after(jiffies, before + HZ * seconds))
1475                         goto out;
1476
1477                 msleep(50);
1478         }
1479         retval = 0;
1480 out:
1481         return retval;
1482 } /* End twa_poll_status() */
1483
1484 /* This function will poll the status register for disappearance of a flag */
1485 static int twa_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
1486 {
1487         u32 status_reg_value;
1488         unsigned long before;
1489         int retval = 1;
1490
1491         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1492         before = jiffies;
1493
1494         if (twa_check_bits(status_reg_value))
1495                 twa_decode_bits(tw_dev, status_reg_value);
1496
1497         while ((status_reg_value & flag) != 0) {
1498                 status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1499                 if (twa_check_bits(status_reg_value))
1500                         twa_decode_bits(tw_dev, status_reg_value);
1501
1502                 if (time_after(jiffies, before + HZ * seconds))
1503                         goto out;
1504
1505                 msleep(50);
1506         }
1507         retval = 0;
1508 out:
1509         return retval;
1510 } /* End twa_poll_status_gone() */
1511
1512 /* This function will attempt to post a command packet to the board */
1513 static int twa_post_command_packet(TW_Device_Extension *tw_dev, int request_id, char internal)
1514 {
1515         u32 status_reg_value;
1516         dma_addr_t command_que_value;
1517         int retval = 1;
1518
1519         command_que_value = tw_dev->command_packet_phys[request_id];
1520
1521         /* For 9650SE write low 4 bytes first */
1522         if ((tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
1523             (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)) {
1524                 command_que_value += TW_COMMAND_OFFSET;
1525                 writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR_LARGE(tw_dev));
1526         }
1527
1528         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1529
1530         if (twa_check_bits(status_reg_value))
1531                 twa_decode_bits(tw_dev, status_reg_value);
1532
1533         if (((tw_dev->pending_request_count > 0) && (tw_dev->state[request_id] != TW_S_PENDING)) || (status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL)) {
1534
1535                 /* Only pend internal driver commands */
1536                 if (!internal) {
1537                         retval = SCSI_MLQUEUE_HOST_BUSY;
1538                         goto out;
1539                 }
1540
1541                 /* Couldn't post the command packet, so we do it later */
1542                 if (tw_dev->state[request_id] != TW_S_PENDING) {
1543                         tw_dev->state[request_id] = TW_S_PENDING;
1544                         tw_dev->pending_request_count++;
1545                         if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
1546                                 tw_dev->max_pending_request_count = tw_dev->pending_request_count;
1547                         }
1548                         tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
1549                         tw_dev->pending_tail = (tw_dev->pending_tail + 1) % TW_Q_LENGTH;
1550                 }
1551                 TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
1552                 goto out;
1553         } else {
1554                 if ((tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
1555                     (tw_dev->tw_pci_dev->device == PCI_DEVICE_ID_3WARE_9690SA)) {
1556                         /* Now write upper 4 bytes */
1557                         writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR_LARGE(tw_dev) + 0x4);
1558                 } else {
1559                         if (sizeof(dma_addr_t) > 4) {
1560                                 command_que_value += TW_COMMAND_OFFSET;
1561                                 writel((u32)command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1562                                 writel((u32)((u64)command_que_value >> 32), TW_COMMAND_QUEUE_REG_ADDR(tw_dev) + 0x4);
1563                         } else {
1564                                 writel(TW_COMMAND_OFFSET + command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
1565                         }
1566                 }
1567                 tw_dev->state[request_id] = TW_S_POSTED;
1568                 tw_dev->posted_request_count++;
1569                 if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
1570                         tw_dev->max_posted_request_count = tw_dev->posted_request_count;
1571                 }
1572         }
1573         retval = 0;
1574 out:
1575         return retval;
1576 } /* End twa_post_command_packet() */
1577
1578 /* This function will reset a device extension */
1579 static int twa_reset_device_extension(TW_Device_Extension *tw_dev)
1580 {
1581         int i = 0;
1582         int retval = 1;
1583         unsigned long flags = 0;
1584
1585         set_bit(TW_IN_RESET, &tw_dev->flags);
1586         TW_DISABLE_INTERRUPTS(tw_dev);
1587         TW_MASK_COMMAND_INTERRUPT(tw_dev);
1588         spin_lock_irqsave(tw_dev->host->host_lock, flags);
1589
1590         /* Abort all requests that are in progress */
1591         for (i = 0; i < TW_Q_LENGTH; i++) {
1592                 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1593                     (tw_dev->state[i] != TW_S_INITIAL) &&
1594                     (tw_dev->state[i] != TW_S_COMPLETED)) {
1595                         if (tw_dev->srb[i]) {
1596                                 struct scsi_cmnd *cmd = tw_dev->srb[i];
1597
1598                                 cmd->result = (DID_RESET << 16);
1599                                 if (twa_command_mapped(cmd))
1600                                         scsi_dma_unmap(cmd);
1601                                 scsi_done(cmd);
1602                         }
1603                 }
1604         }
1605
1606         /* Reset queues and counts */
1607         for (i = 0; i < TW_Q_LENGTH; i++) {
1608                 tw_dev->free_queue[i] = i;
1609                 tw_dev->state[i] = TW_S_INITIAL;
1610         }
1611         tw_dev->free_head = TW_Q_START;
1612         tw_dev->free_tail = TW_Q_START;
1613         tw_dev->posted_request_count = 0;
1614         tw_dev->pending_request_count = 0;
1615         tw_dev->pending_head = TW_Q_START;
1616         tw_dev->pending_tail = TW_Q_START;
1617         tw_dev->reset_print = 0;
1618
1619         spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1620
1621         if (twa_reset_sequence(tw_dev, 1))
1622                 goto out;
1623
1624         TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
1625         clear_bit(TW_IN_RESET, &tw_dev->flags);
1626         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1627
1628         retval = 0;
1629 out:
1630         return retval;
1631 } /* End twa_reset_device_extension() */
1632
1633 /* This function will reset a controller */
1634 static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
1635 {
1636         int tries = 0, retval = 1, flashed = 0, do_soft_reset = soft_reset;
1637
1638         while (tries < TW_MAX_RESET_TRIES) {
1639                 if (do_soft_reset) {
1640                         TW_SOFT_RESET(tw_dev);
1641                         /* Clear pchip/response queue on 9550SX */
1642                         if (twa_empty_response_queue_large(tw_dev)) {
1643                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x36, "Response queue (large) empty failed during reset sequence");
1644                                 do_soft_reset = 1;
1645                                 tries++;
1646                                 continue;
1647                         }
1648                 }
1649
1650                 /* Make sure controller is in a good state */
1651                 if (twa_poll_status(tw_dev, TW_STATUS_MICROCONTROLLER_READY | (do_soft_reset == 1 ? TW_STATUS_ATTENTION_INTERRUPT : 0), 60)) {
1652                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Microcontroller not ready during reset sequence");
1653                         do_soft_reset = 1;
1654                         tries++;
1655                         continue;
1656                 }
1657
1658                 /* Empty response queue */
1659                 if (twa_empty_response_queue(tw_dev)) {
1660                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Response queue empty failed during reset sequence");
1661                         do_soft_reset = 1;
1662                         tries++;
1663                         continue;
1664                 }
1665
1666                 flashed = 0;
1667
1668                 /* Check for compatibility/flash */
1669                 if (twa_check_srl(tw_dev, &flashed)) {
1670                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Compatibility check failed during reset sequence");
1671                         do_soft_reset = 1;
1672                         tries++;
1673                         continue;
1674                 } else {
1675                         if (flashed) {
1676                                 tries++;
1677                                 continue;
1678                         }
1679                 }
1680
1681                 /* Drain the AEN queue */
1682                 if (twa_aen_drain_queue(tw_dev, soft_reset)) {
1683                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x22, "AEN drain failed during reset sequence");
1684                         do_soft_reset = 1;
1685                         tries++;
1686                         continue;
1687                 }
1688
1689                 /* If we got here, controller is in a good state */
1690                 retval = 0;
1691                 goto out;
1692         }
1693 out:
1694         return retval;
1695 } /* End twa_reset_sequence() */
1696
1697 /* This funciton returns unit geometry in cylinders/heads/sectors */
1698 static int twa_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[])
1699 {
1700         int heads, sectors, cylinders;
1701
1702         if (capacity >= 0x200000) {
1703                 heads = 255;
1704                 sectors = 63;
1705                 cylinders = sector_div(capacity, heads * sectors);
1706         } else {
1707                 heads = 64;
1708                 sectors = 32;
1709                 cylinders = sector_div(capacity, heads * sectors);
1710         }
1711
1712         geom[0] = heads;
1713         geom[1] = sectors;
1714         geom[2] = cylinders;
1715
1716         return 0;
1717 } /* End twa_scsi_biosparam() */
1718
1719 /* This is the new scsi eh reset function */
1720 static int twa_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1721 {
1722         TW_Device_Extension *tw_dev = NULL;
1723         int retval = FAILED;
1724
1725         tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1726
1727         tw_dev->num_resets++;
1728
1729         sdev_printk(KERN_WARNING, SCpnt->device,
1730                 "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n",
1731                 TW_DRIVER, 0x2c, SCpnt->cmnd[0]);
1732
1733         /* Make sure we are not issuing an ioctl or resetting from ioctl */
1734         mutex_lock(&tw_dev->ioctl_lock);
1735
1736         /* Now reset the card and some of the device extension data */
1737         if (twa_reset_device_extension(tw_dev)) {
1738                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2b, "Controller reset failed during scsi host reset");
1739                 goto out;
1740         }
1741
1742         retval = SUCCESS;
1743 out:
1744         mutex_unlock(&tw_dev->ioctl_lock);
1745         return retval;
1746 } /* End twa_scsi_eh_reset() */
1747
1748 /* This is the main scsi queue function to handle scsi opcodes */
1749 static int twa_scsi_queue_lck(struct scsi_cmnd *SCpnt)
1750 {
1751         void (*done)(struct scsi_cmnd *) = scsi_done;
1752         int request_id, retval;
1753         TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1754
1755         /* If we are resetting due to timed out ioctl, report as busy */
1756         if (test_bit(TW_IN_RESET, &tw_dev->flags)) {
1757                 retval = SCSI_MLQUEUE_HOST_BUSY;
1758                 goto out;
1759         }
1760
1761         /* Check if this FW supports luns */
1762         if ((SCpnt->device->lun != 0) && (tw_dev->tw_compat_info.working_srl < TW_FW_SRL_LUNS_SUPPORTED)) {
1763                 SCpnt->result = (DID_BAD_TARGET << 16);
1764                 done(SCpnt);
1765                 retval = 0;
1766                 goto out;
1767         }
1768
1769         /* Get a free request id */
1770         twa_get_request_id(tw_dev, &request_id);
1771
1772         /* Save the scsi command for use by the ISR */
1773         tw_dev->srb[request_id] = SCpnt;
1774
1775         retval = twa_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
1776         switch (retval) {
1777         case SCSI_MLQUEUE_HOST_BUSY:
1778                 if (twa_command_mapped(SCpnt))
1779                         scsi_dma_unmap(SCpnt);
1780                 twa_free_request_id(tw_dev, request_id);
1781                 break;
1782         case 1:
1783                 SCpnt->result = (DID_ERROR << 16);
1784                 if (twa_command_mapped(SCpnt))
1785                         scsi_dma_unmap(SCpnt);
1786                 done(SCpnt);
1787                 tw_dev->state[request_id] = TW_S_COMPLETED;
1788                 twa_free_request_id(tw_dev, request_id);
1789                 retval = 0;
1790         }
1791 out:
1792         return retval;
1793 } /* End twa_scsi_queue() */
1794
1795 static DEF_SCSI_QCMD(twa_scsi_queue)
1796
1797 /* This function hands scsi cdb's to the firmware */
1798 static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id,
1799                                    unsigned char *cdb, int use_sg,
1800                                    TW_SG_Entry *sglistarg)
1801 {
1802         TW_Command_Full *full_command_packet;
1803         TW_Command_Apache *command_packet;
1804         u32 num_sectors = 0x0;
1805         int i, sg_count;
1806         struct scsi_cmnd *srb = NULL;
1807         struct scatterlist *sg;
1808         int retval = 1;
1809
1810         if (tw_dev->srb[request_id])
1811                 srb = tw_dev->srb[request_id];
1812
1813         /* Initialize command packet */
1814         full_command_packet = tw_dev->command_packet_virt[request_id];
1815         full_command_packet->header.header_desc.size_header = 128;
1816         full_command_packet->header.status_block.error = 0;
1817         full_command_packet->header.status_block.severity__reserved = 0;
1818
1819         command_packet = &full_command_packet->command.newcommand;
1820         command_packet->status = 0;
1821         command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI);
1822
1823         /* We forced 16 byte cdb use earlier */
1824         if (!cdb)
1825                 memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN);
1826         else
1827                 memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN);
1828
1829         if (srb) {
1830                 command_packet->unit = srb->device->id;
1831                 command_packet->request_id__lunl =
1832                         TW_REQ_LUN_IN(srb->device->lun, request_id);
1833         } else {
1834                 command_packet->request_id__lunl =
1835                         TW_REQ_LUN_IN(0, request_id);
1836                 command_packet->unit = 0;
1837         }
1838
1839         command_packet->sgl_offset = 16;
1840
1841         if (!sglistarg) {
1842                 /* Map sglist from scsi layer to cmd packet */
1843
1844                 if (scsi_sg_count(srb)) {
1845                         if (!twa_command_mapped(srb)) {
1846                                 if (srb->sc_data_direction == DMA_TO_DEVICE ||
1847                                     srb->sc_data_direction == DMA_BIDIRECTIONAL)
1848                                         scsi_sg_copy_to_buffer(srb,
1849                                                                tw_dev->generic_buffer_virt[request_id],
1850                                                                TW_SECTOR_SIZE);
1851                                 command_packet->sg_list[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
1852                                 command_packet->sg_list[0].length = cpu_to_le32(TW_MIN_SGL_LENGTH);
1853                         } else {
1854                                 sg_count = scsi_dma_map(srb);
1855                                 if (sg_count < 0)
1856                                         goto out;
1857
1858                                 scsi_for_each_sg(srb, sg, sg_count, i) {
1859                                         command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg));
1860                                         command_packet->sg_list[i].length = cpu_to_le32(sg_dma_len(sg));
1861                                         if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
1862                                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2e, "Found unaligned sgl address during execute scsi");
1863                                                 goto out;
1864                                         }
1865                                 }
1866                         }
1867                         command_packet->sgl_entries__lunh = TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id]));
1868                 }
1869         } else {
1870                 /* Internal cdb post */
1871                 for (i = 0; i < use_sg; i++) {
1872                         command_packet->sg_list[i].address = sglistarg[i].address;
1873                         command_packet->sg_list[i].length = sglistarg[i].length;
1874                         if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
1875                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2f, "Found unaligned sgl address during internal post");
1876                                 goto out;
1877                         }
1878                 }
1879                 command_packet->sgl_entries__lunh = TW_REQ_LUN_IN(0, use_sg);
1880         }
1881
1882         if (srb) {
1883                 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6)
1884                         num_sectors = (u32)srb->cmnd[4];
1885
1886                 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10)
1887                         num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1888         }
1889
1890         /* Update sector statistic */
1891         tw_dev->sector_count = num_sectors;
1892         if (tw_dev->sector_count > tw_dev->max_sector_count)
1893                 tw_dev->max_sector_count = tw_dev->sector_count;
1894
1895         /* Update SG statistics */
1896         if (srb) {
1897                 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1898                 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1899                         tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1900         }
1901
1902         /* Now post the command to the board */
1903         if (srb) {
1904                 retval = twa_post_command_packet(tw_dev, request_id, 0);
1905         } else {
1906                 twa_post_command_packet(tw_dev, request_id, 1);
1907                 retval = 0;
1908         }
1909 out:
1910         return retval;
1911 } /* End twa_scsiop_execute_scsi() */
1912
1913 /* This function completes an execute scsi operation */
1914 static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id)
1915 {
1916         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1917
1918         if (!twa_command_mapped(cmd) &&
1919             (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1920              cmd->sc_data_direction == DMA_BIDIRECTIONAL)) {
1921                 if (scsi_sg_count(cmd) == 1) {
1922                         void *buf = tw_dev->generic_buffer_virt[request_id];
1923
1924                         scsi_sg_copy_from_buffer(cmd, buf, TW_SECTOR_SIZE);
1925                 }
1926         }
1927 } /* End twa_scsiop_execute_scsi_complete() */
1928
1929 /* This function tells the controller to shut down */
1930 static void __twa_shutdown(TW_Device_Extension *tw_dev)
1931 {
1932         /* Disable interrupts */
1933         TW_DISABLE_INTERRUPTS(tw_dev);
1934
1935         /* Free up the IRQ */
1936         free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
1937
1938         printk(KERN_WARNING "3w-9xxx: Shutting down host %d.\n", tw_dev->host->host_no);
1939
1940         /* Tell the card we are shutting down */
1941         if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
1942                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x31, "Connection shutdown failed");
1943         } else {
1944                 printk(KERN_WARNING "3w-9xxx: Shutdown complete.\n");
1945         }
1946
1947         /* Clear all interrupts just before exit */
1948         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1949 } /* End __twa_shutdown() */
1950
1951 /* Wrapper for __twa_shutdown */
1952 static void twa_shutdown(struct pci_dev *pdev)
1953 {
1954         struct Scsi_Host *host = pci_get_drvdata(pdev);
1955         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
1956
1957         __twa_shutdown(tw_dev);
1958 } /* End twa_shutdown() */
1959
1960 /* This function will look up a string */
1961 static char *twa_string_lookup(twa_message_type *table, unsigned int code)
1962 {
1963         int index;
1964
1965         for (index = 0; ((code != table[index].code) &&
1966                       (table[index].text != (char *)0)); index++);
1967         return(table[index].text);
1968 } /* End twa_string_lookup() */
1969
1970 /* This function gets called when a disk is coming on-line */
1971 static int twa_slave_configure(struct scsi_device *sdev)
1972 {
1973         /* Force 60 second timeout */
1974         blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
1975
1976         return 0;
1977 } /* End twa_slave_configure() */
1978
1979 /* scsi_host_template initializer */
1980 static struct scsi_host_template driver_template = {
1981         .module                 = THIS_MODULE,
1982         .name                   = "3ware 9000 Storage Controller",
1983         .queuecommand           = twa_scsi_queue,
1984         .eh_host_reset_handler  = twa_scsi_eh_reset,
1985         .bios_param             = twa_scsi_biosparam,
1986         .change_queue_depth     = scsi_change_queue_depth,
1987         .can_queue              = TW_Q_LENGTH-2,
1988         .slave_configure        = twa_slave_configure,
1989         .this_id                = -1,
1990         .sg_tablesize           = TW_APACHE_MAX_SGL_LENGTH,
1991         .max_sectors            = TW_MAX_SECTORS,
1992         .cmd_per_lun            = TW_MAX_CMDS_PER_LUN,
1993         .shost_groups           = twa_host_groups,
1994         .emulated               = 1,
1995         .no_write_same          = 1,
1996 };
1997
1998 /* This function will probe and initialize a card */
1999 static int twa_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2000 {
2001         struct Scsi_Host *host = NULL;
2002         TW_Device_Extension *tw_dev;
2003         unsigned long mem_addr, mem_len;
2004         int retval;
2005
2006         retval = pci_enable_device(pdev);
2007         if (retval) {
2008                 TW_PRINTK(host, TW_DRIVER, 0x34, "Failed to enable pci device");
2009                 goto out_disable_device;
2010         }
2011
2012         pci_set_master(pdev);
2013         pci_try_set_mwi(pdev);
2014
2015         retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2016         if (retval)
2017                 retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2018         if (retval) {
2019                 TW_PRINTK(host, TW_DRIVER, 0x23, "Failed to set dma mask");
2020                 retval = -ENODEV;
2021                 goto out_disable_device;
2022         }
2023
2024         host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2025         if (!host) {
2026                 TW_PRINTK(host, TW_DRIVER, 0x24, "Failed to allocate memory for device extension");
2027                 retval = -ENOMEM;
2028                 goto out_disable_device;
2029         }
2030         tw_dev = (TW_Device_Extension *)host->hostdata;
2031
2032         /* Save values to device extension */
2033         tw_dev->host = host;
2034         tw_dev->tw_pci_dev = pdev;
2035
2036         if (twa_initialize_device_extension(tw_dev)) {
2037                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x25, "Failed to initialize device extension");
2038                 retval = -ENOMEM;
2039                 goto out_free_device_extension;
2040         }
2041
2042         /* Request IO regions */
2043         retval = pci_request_regions(pdev, "3w-9xxx");
2044         if (retval) {
2045                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Failed to get mem region");
2046                 goto out_free_device_extension;
2047         }
2048
2049         if (pdev->device == PCI_DEVICE_ID_3WARE_9000) {
2050                 mem_addr = pci_resource_start(pdev, 1);
2051                 mem_len = pci_resource_len(pdev, 1);
2052         } else {
2053                 mem_addr = pci_resource_start(pdev, 2);
2054                 mem_len = pci_resource_len(pdev, 2);
2055         }
2056
2057         /* Save base address */
2058         tw_dev->base_addr = ioremap(mem_addr, mem_len);
2059         if (!tw_dev->base_addr) {
2060                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x35, "Failed to ioremap");
2061                 retval = -ENOMEM;
2062                 goto out_release_mem_region;
2063         }
2064
2065         /* Disable interrupts on the card */
2066         TW_DISABLE_INTERRUPTS(tw_dev);
2067
2068         /* Initialize the card */
2069         if (twa_reset_sequence(tw_dev, 0)) {
2070                 retval = -ENOMEM;
2071                 goto out_iounmap;
2072         }
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(*(__le32 *)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 /* This function is called on PCI suspend */
2187 static int __maybe_unused twa_suspend(struct device *dev)
2188 {
2189         struct pci_dev *pdev = to_pci_dev(dev);
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         return 0;
2210 } /* End twa_suspend() */
2211
2212 /* This function is called on PCI resume */
2213 static int __maybe_unused twa_resume(struct device *dev)
2214 {
2215         int retval = 0;
2216         struct pci_dev *pdev = to_pci_dev(dev);
2217         struct Scsi_Host *host = pci_get_drvdata(pdev);
2218         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2219
2220         printk(KERN_WARNING "3w-9xxx: Resuming host %d.\n", tw_dev->host->host_no);
2221
2222         pci_try_set_mwi(pdev);
2223
2224         retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2225         if (retval)
2226                 retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2227         if (retval) {
2228                 TW_PRINTK(host, TW_DRIVER, 0x40, "Failed to set dma mask during resume");
2229                 retval = -ENODEV;
2230                 goto out_disable_device;
2231         }
2232
2233         /* Initialize the card */
2234         if (twa_reset_sequence(tw_dev, 0)) {
2235                 retval = -ENODEV;
2236                 goto out_disable_device;
2237         }
2238
2239         /* Now setup the interrupt handler */
2240         retval = request_irq(pdev->irq, twa_interrupt, IRQF_SHARED, "3w-9xxx", tw_dev);
2241         if (retval) {
2242                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x42, "Error requesting IRQ during resume");
2243                 retval = -ENODEV;
2244                 goto out_disable_device;
2245         }
2246
2247         /* Now enable MSI if enabled */
2248         if (test_bit(TW_USING_MSI, &tw_dev->flags))
2249                 pci_enable_msi(pdev);
2250
2251         /* Re-enable interrupts on the card */
2252         TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2253
2254         printk(KERN_WARNING "3w-9xxx: Resume complete.\n");
2255         return 0;
2256
2257 out_disable_device:
2258         scsi_remove_host(host);
2259
2260         return retval;
2261 } /* End twa_resume() */
2262
2263 /* PCI Devices supported by this driver */
2264 static struct pci_device_id twa_pci_tbl[] = {
2265         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9000,
2266           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2267         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9550SX,
2268           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2269         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9650SE,
2270           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2271         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9690SA,
2272           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2273         { }
2274 };
2275 MODULE_DEVICE_TABLE(pci, twa_pci_tbl);
2276
2277 static SIMPLE_DEV_PM_OPS(twa_pm_ops, twa_suspend, twa_resume);
2278
2279 /* pci_driver initializer */
2280 static struct pci_driver twa_driver = {
2281         .name           = "3w-9xxx",
2282         .id_table       = twa_pci_tbl,
2283         .probe          = twa_probe,
2284         .remove         = twa_remove,
2285         .driver.pm      = &twa_pm_ops,
2286         .shutdown       = twa_shutdown
2287 };
2288
2289 /* This function is called on driver initialization */
2290 static int __init twa_init(void)
2291 {
2292         printk(KERN_WARNING "3ware 9000 Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2293
2294         return pci_register_driver(&twa_driver);
2295 } /* End twa_init() */
2296
2297 /* This function is called on driver exit */
2298 static void __exit twa_exit(void)
2299 {
2300         pci_unregister_driver(&twa_driver);
2301 } /* End twa_exit() */
2302
2303 module_init(twa_init);
2304 module_exit(twa_exit);
2305