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 device_attribute *twa_host_attrs[] = {
 201         &twa_host_stats_attr,
 202         NULL,
 203 };
 204
 205 /* File operations struct for character device */
 206 static const struct file_operations twa_fops = {
 207         .owner          = THIS_MODULE,
 208         .unlocked_ioctl = twa_chrdev_ioctl,
 209         .open           = twa_chrdev_open,
 210         .release        = NULL,
 211         .llseek         = noop_llseek,
 212 };
 213
 214 /*
 215  * The controllers use an inline buffer instead of a mapped SGL for small,
 216  * single entry buffers.  Note that we treat a zero-length transfer like
 217  * a mapped SGL.
 218  */
 219 static bool twa_command_mapped(struct scsi_cmnd *cmd)
 220 {
 221         return scsi_sg_count(cmd) != 1 ||
 222                 scsi_bufflen(cmd) >= TW_MIN_SGL_LENGTH;
 223 }
 224
 225 /* This function will complete an aen request from the isr */
 226 static int twa_aen_complete(TW_Device_Extension *tw_dev, int request_id)
 227 {
 228         TW_Command_Full *full_command_packet;
 229         TW_Command *command_packet;
 230         TW_Command_Apache_Header *header;
 231         unsigned short aen;
 232         int retval = 1;
 233
 234         header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
 235         tw_dev->posted_request_count--;
 236         aen = le16_to_cpu(header->status_block.error);
 237         full_command_packet = tw_dev->command_packet_virt[request_id];
 238         command_packet = &full_command_packet->command.oldcommand;
 239
 240         /* First check for internal completion of set param for time sync */
 241         if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) {
 242                 /* Keep reading the queue in case there are more aen's */
 243                 if (twa_aen_read_queue(tw_dev, request_id))
 244                         goto out2;
 245                 else {
 246                         retval = 0;
 247                         goto out;
 248                 }
 249         }
 250
 251         switch (aen) {
 252         case TW_AEN_QUEUE_EMPTY:
 253                 /* Quit reading the queue if this is the last one */
 254                 break;
 255         case TW_AEN_SYNC_TIME_WITH_HOST:
 256                 twa_aen_sync_time(tw_dev, request_id);
 257                 retval = 0;
 258                 goto out;
 259         default:
 260                 twa_aen_queue_event(tw_dev, header);
 261
 262                 /* If there are more aen's, keep reading the queue */
 263                 if (twa_aen_read_queue(tw_dev, request_id))
 264                         goto out2;
 265                 else {
 266                         retval = 0;
 267                         goto out;
 268                 }
 269         }
 270         retval = 0;
 271 out2:
 272         tw_dev->state[request_id] = TW_S_COMPLETED;
 273         twa_free_request_id(tw_dev, request_id);
 274         clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
 275 out:
 276         return retval;
 277 } /* End twa_aen_complete() */
 278
 279 /* This function will drain aen queue */
 280 static int twa_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
 281 {
 282         int request_id = 0;
 283         unsigned char cdb[TW_MAX_CDB_LEN];
 284         TW_SG_Entry sglist[1];
 285         int finished = 0, count = 0;
 286         TW_Command_Full *full_command_packet;
 287         TW_Command_Apache_Header *header;
 288         unsigned short aen;
 289         int first_reset = 0, queue = 0, retval = 1;
 290
 291         if (no_check_reset)
 292                 first_reset = 0;
 293         else
 294                 first_reset = 1;
 295
 296         full_command_packet = tw_dev->command_packet_virt[request_id];
 297         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 298
 299         /* Initialize cdb */
 300         memset(&cdb, 0, TW_MAX_CDB_LEN);
 301         cdb[0] = REQUEST_SENSE; /* opcode */
 302         cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
 303
 304         /* Initialize sglist */
 305         memset(&sglist, 0, sizeof(TW_SG_Entry));
 306         sglist[0].length = TW_SECTOR_SIZE;
 307         sglist[0].address = tw_dev->generic_buffer_phys[request_id];
 308
 309         if (sglist[0].address & TW_ALIGNMENT_9000_SGL) {
 310                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Found unaligned address during AEN drain");
 311                 goto out;
 312         }
 313
 314         /* Mark internal command */
 315         tw_dev->srb[request_id] = NULL;
 316
 317         do {
 318                 /* Send command to the board */
 319                 if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
 320                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Error posting request sense");
 321                         goto out;
 322                 }
 323
 324                 /* Now poll for completion */
 325                 if (twa_poll_response(tw_dev, request_id, 30)) {
 326                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "No valid response while draining AEN queue");
 327                         tw_dev->posted_request_count--;
 328                         goto out;
 329                 }
 330
 331                 tw_dev->posted_request_count--;
 332                 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
 333                 aen = le16_to_cpu(header->status_block.error);
 334                 queue = 0;
 335                 count++;
 336
 337                 switch (aen) {
 338                 case TW_AEN_QUEUE_EMPTY:
 339                         if (first_reset != 1)
 340                                 goto out;
 341                         else
 342                                 finished = 1;
 343                         break;
 344                 case TW_AEN_SOFT_RESET:
 345                         if (first_reset == 0)
 346                                 first_reset = 1;
 347                         else
 348                                 queue = 1;
 349                         break;
 350                 case TW_AEN_SYNC_TIME_WITH_HOST:
 351                         break;
 352                 default:
 353                         queue = 1;
 354                 }
 355
 356                 /* Now queue an event info */
 357                 if (queue)
 358                         twa_aen_queue_event(tw_dev, header);
 359         } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN));
 360
 361         if (count == TW_MAX_AEN_DRAIN)
 362                 goto out;
 363
 364         retval = 0;
 365 out:
 366         tw_dev->state[request_id] = TW_S_INITIAL;
 367         return retval;
 368 } /* End twa_aen_drain_queue() */
 369
 370 /* This function will queue an event */
 371 static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
 372 {
 373         u32 local_time;
 374         TW_Event *event;
 375         unsigned short aen;
 376         char host[16];
 377         char *error_str;
 378
 379         tw_dev->aen_count++;
 380
 381         /* Fill out event info */
 382         event = tw_dev->event_queue[tw_dev->error_index];
 383
 384         /* Check for clobber */
 385         host[0] = '\0';
 386         if (tw_dev->host) {
 387                 sprintf(host, " scsi%d:", tw_dev->host->host_no);
 388                 if (event->retrieved == TW_AEN_NOT_RETRIEVED)
 389                         tw_dev->aen_clobber = 1;
 390         }
 391
 392         aen = le16_to_cpu(header->status_block.error);
 393         memset(event, 0, sizeof(TW_Event));
 394
 395         event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
 396         /* event->time_stamp_sec overflows in y2106 */
 397         local_time = (u32)(ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60));
 398         event->time_stamp_sec = local_time;
 399         event->aen_code = aen;
 400         event->retrieved = TW_AEN_NOT_RETRIEVED;
 401         event->sequence_id = tw_dev->error_sequence_id;
 402         tw_dev->error_sequence_id++;
 403
 404         /* Check for embedded error string */
 405         error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]);
 406
 407         header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0';
 408         event->parameter_len = strlen(header->err_specific_desc);
 409         memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + (error_str[0] == '\0' ? 0 : (1 + strlen(error_str))));
 410         if (event->severity != TW_AEN_SEVERITY_DEBUG)
 411                 printk(KERN_WARNING "3w-9xxx:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
 412                        host,
 413                        twa_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
 414                        TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen,
 415                        error_str[0] == '\0' ? twa_string_lookup(twa_aen_table, aen) : error_str,
 416                        header->err_specific_desc);
 417         else
 418                 tw_dev->aen_count--;
 419
 420         if ((tw_dev->error_index + 1) == TW_Q_LENGTH)
 421                 tw_dev->event_queue_wrapped = 1;
 422         tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
 423 } /* End twa_aen_queue_event() */
 424
 425 /* This function will read the aen queue from the isr */
 426 static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
 427 {
 428         unsigned char cdb[TW_MAX_CDB_LEN];
 429         TW_SG_Entry sglist[1];
 430         TW_Command_Full *full_command_packet;
 431         int retval = 1;
 432
 433         full_command_packet = tw_dev->command_packet_virt[request_id];
 434         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 435
 436         /* Initialize cdb */
 437         memset(&cdb, 0, TW_MAX_CDB_LEN);
 438         cdb[0] = REQUEST_SENSE; /* opcode */
 439         cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
 440
 441         /* Initialize sglist */
 442         memset(&sglist, 0, sizeof(TW_SG_Entry));
 443         sglist[0].length = TW_SECTOR_SIZE;
 444         sglist[0].address = tw_dev->generic_buffer_phys[request_id];
 445
 446         /* Mark internal command */
 447         tw_dev->srb[request_id] = NULL;
 448
 449         /* Now post the command packet */
 450         if (twa_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
 451                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "Post failed while reading AEN queue");
 452                 goto out;
 453         }
 454         retval = 0;
 455 out:
 456         return retval;
 457 } /* End twa_aen_read_queue() */
 458
 459 /* This function will look up an AEN severity string */
 460 static char *twa_aen_severity_lookup(unsigned char severity_code)
 461 {
 462         char *retval = NULL;
 463
 464         if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) ||
 465             (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG))
 466                 goto out;
 467
 468         retval = twa_aen_severity_table[severity_code];
 469 out:
 470         return retval;
 471 } /* End twa_aen_severity_lookup() */
 472
 473 /* This function will sync firmware time with the host time */
 474 static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
 475 {
 476         u32 schedulertime;
 477         TW_Command_Full *full_command_packet;
 478         TW_Command *command_packet;
 479         TW_Param_Apache *param;
 480         time64_t local_time;
 481
 482         /* Fill out the command packet */
 483         full_command_packet = tw_dev->command_packet_virt[request_id];
 484         memset(full_command_packet, 0, sizeof(TW_Command_Full));
 485         command_packet = &full_command_packet->command.oldcommand;
 486         command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
 487         command_packet->request_id = request_id;
 488         command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
 489         command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
 490         command_packet->size = TW_COMMAND_SIZE;
 491         command_packet->byte6_offset.parameter_count = cpu_to_le16(1);
 492
 493         /* Setup the param */
 494         param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
 495         memset(param, 0, TW_SECTOR_SIZE);
 496         param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */
 497         param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
 498         param->parameter_size_bytes = cpu_to_le16(4);
 499
 500         /* Convert system time in UTC to local time seconds since last
 501            Sunday 12:00AM */
 502         local_time = (ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60));
 503         div_u64_rem(local_time - (3 * 86400), 604800, &schedulertime);
 504         schedulertime = cpu_to_le32(schedulertime % 604800);
 505
 506         memcpy(param->data, &schedulertime, sizeof(u32));
 507
 508         /* Mark internal command */
 509         tw_dev->srb[request_id] = NULL;
 510
 511         /* Now post the command */
 512         twa_post_command_packet(tw_dev, request_id, 1);
 513 } /* End twa_aen_sync_time() */
 514
 515 /* This function will allocate memory and check if it is correctly aligned */
 516 static int twa_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
 517 {
 518         int i;
 519         dma_addr_t dma_handle;
 520         unsigned long *cpu_addr;
 521         int retval = 1;
 522
 523         cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev,
 524                         size * TW_Q_LENGTH, &dma_handle, GFP_KERNEL);
 525         if (!cpu_addr) {
 526                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
 527                 goto out;
 528         }
 529
 530         if ((unsigned long)cpu_addr % (TW_ALIGNMENT_9000)) {
 531                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x6, "Failed to allocate correctly aligned memory");
 532                 dma_free_coherent(&tw_dev->tw_pci_dev->dev, size * TW_Q_LENGTH,
 533                                 cpu_addr, dma_handle);
 534                 goto out;
 535         }
 536
 537         memset(cpu_addr, 0, size*TW_Q_LENGTH);
 538
 539         for (i = 0; i < TW_Q_LENGTH; i++) {
 540                 switch(which) {
 541                 case 0:
 542                         tw_dev->command_packet_phys[i] = dma_handle+(i*size);
 543                         tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size));
 544                         break;
 545                 case 1:
 546                         tw_dev->generic_buffer_phys[i] = dma_handle+(i*size);
 547                         tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
 548                         break;
 549                 }
 550         }
 551         retval = 0;
 552 out:
 553         return retval;
 554 } /* End twa_allocate_memory() */
 555
 556 /* This function will check the status register for unexpected bits */
 557 static int twa_check_bits(u32 status_reg_value)
 558 {
 559         int retval = 1;
 560
 561         if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS)
 562                 goto out;
 563         if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0)
 564                 goto out;
 565
 566         retval = 0;
 567 out:
 568         return retval;
 569 } /* End twa_check_bits() */
 570
 571 /* This function will check the srl and decide if we are compatible  */
 572 static int twa_check_srl(TW_Device_Extension *tw_dev, int *flashed)
 573 {
 574         int retval = 1;
 575         unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0;
 576         unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0;
 577         u32 init_connect_result = 0;
 578
 579         if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
 580                                TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
 581                                TW_9000_ARCH_ID, TW_CURRENT_DRIVER_BRANCH,
 582                                TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl,
 583                                &fw_on_ctlr_arch_id, &fw_on_ctlr_branch,
 584                                &fw_on_ctlr_build, &init_connect_result)) {
 585                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "Initconnection failed while checking SRL");
 586                 goto out;
 587         }
 588
 589         tw_dev->tw_compat_info.working_srl = fw_on_ctlr_srl;
 590         tw_dev->tw_compat_info.working_branch = fw_on_ctlr_branch;
 591         tw_dev->tw_compat_info.working_build = fw_on_ctlr_build;
 592
 593         /* Try base mode compatibility */
 594         if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
 595                 if (twa_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
 596                                        TW_EXTENDED_INIT_CONNECT,
 597                                        TW_BASE_FW_SRL, TW_9000_ARCH_ID,
 598                                        TW_BASE_FW_BRANCH, TW_BASE_FW_BUILD,
 599                                        &fw_on_ctlr_srl, &fw_on_ctlr_arch_id,
 600                                        &fw_on_ctlr_branch, &fw_on_ctlr_build,
 601                                        &init_connect_result)) {
 602                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Initconnection (base mode) failed while checking SRL");
 603                         goto out;
 604                 }
 605                 if (!(init_connect_result & TW_CTLR_FW_COMPATIBLE)) {
 606                         if (TW_CURRENT_DRIVER_SRL > fw_on_ctlr_srl) {
 607                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x32, "Firmware and driver incompatibility: please upgrade firmware");
 608                         } else {
 609                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x33, "Firmware and driver incompatibility: please upgrade driver");
 610                         }
 611                         goto out;
 612                 }
 613                 tw_dev->tw_compat_info.working_srl = TW_BASE_FW_SRL;
 614                 tw_dev->tw_compat_info.working_branch = TW_BASE_FW_BRANCH;
 615                 tw_dev->tw_compat_info.working_build = TW_BASE_FW_BUILD;
 616         }
 617
 618         /* Load rest of compatibility struct */
 619         strlcpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION,
 620                 sizeof(tw_dev->tw_compat_info.driver_version));
 621         tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL;
 622         tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH;
 623         tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD;
 624         tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL;
 625         tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH;
 626         tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD;
 627         tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl;
 628         tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch;
 629         tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build;
 630
 631         retval = 0;
 632 out:
 633         return retval;
 634 } /* End twa_check_srl() */
 635
 636 /* This function handles ioctl for the character device */
 637 static long twa_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 638 {
 639         struct inode *inode = file_inode(file);
 640         long timeout;
 641         unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
 642         dma_addr_t dma_handle;
 643         int request_id = 0;
 644         unsigned int sequence_id = 0;
 645         unsigned char event_index, start_index;
 646         TW_Ioctl_Driver_Command driver_command;
 647         TW_Ioctl_Buf_Apache *tw_ioctl;
 648         TW_Lock *tw_lock;
 649         TW_Command_Full *full_command_packet;
 650         TW_Compatibility_Info *tw_compat_info;
 651         TW_Event *event;
 652         ktime_t current_time;
 653         TW_Device_Extension *tw_dev = twa_device_extension_list[iminor(inode)];
 654         int retval = TW_IOCTL_ERROR_OS_EFAULT;
 655         void __user *argp = (void __user *)arg;
 656
 657         mutex_lock(&twa_chrdev_mutex);
 658
 659         /* Only let one of these through at a time */
 660         if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
 661                 retval = TW_IOCTL_ERROR_OS_EINTR;
 662                 goto out;
 663         }
 664
 665         /* First copy down the driver command */
 666         if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command)))
 667                 goto out2;
 668
 669         /* Check data buffer size */
 670         if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) {
 671                 retval = TW_IOCTL_ERROR_OS_EINVAL;
 672                 goto out2;
 673         }
 674
 675         /* Hardware can only do multiple of 512 byte transfers */
 676         data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511;
 677
 678         /* Now allocate ioctl buf memory */
 679         cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, &dma_handle, GFP_KERNEL);
 680         if (!cpu_addr) {
 681                 retval = TW_IOCTL_ERROR_OS_ENOMEM;
 682                 goto out2;
 683         }
 684
 685         tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
 686
 687         /* Now copy down the entire ioctl */
 688         if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1))
 689                 goto out3;
 690
 691         /* See which ioctl we are doing */
 692         switch (cmd) {
 693         case TW_IOCTL_FIRMWARE_PASS_THROUGH:
 694                 spin_lock_irqsave(tw_dev->host->host_lock, flags);
 695                 twa_get_request_id(tw_dev, &request_id);
 696
 697                 /* Flag internal command */
 698                 tw_dev->srb[request_id] = NULL;
 699
 700                 /* Flag chrdev ioctl */
 701                 tw_dev->chrdev_request_id = request_id;
 702
 703                 full_command_packet = &tw_ioctl->firmware_command;
 704
 705                 /* Load request id and sglist for both command types */
 706                 twa_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted);
 707
 708                 memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full));
 709
 710                 /* Now post the command packet to the controller */
 711                 twa_post_command_packet(tw_dev, request_id, 1);
 712                 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 713
 714                 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
 715
 716                 /* Now wait for command to complete */
 717                 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
 718
 719                 /* We timed out, and didn't get an interrupt */
 720                 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
 721                         /* Now we need to reset the board */
 722                         printk(KERN_WARNING "3w-9xxx: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
 723                                tw_dev->host->host_no, TW_DRIVER, 0x37,
 724                                cmd);
 725                         retval = TW_IOCTL_ERROR_OS_EIO;
 726                         twa_reset_device_extension(tw_dev);
 727                         goto out3;
 728                 }
 729
 730                 /* Now copy in the command packet response */
 731                 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full));
 732
 733                 /* Now complete the io */
 734                 spin_lock_irqsave(tw_dev->host->host_lock, flags);
 735                 tw_dev->posted_request_count--;
 736                 tw_dev->state[request_id] = TW_S_COMPLETED;
 737                 twa_free_request_id(tw_dev, request_id);
 738                 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
 739                 break;
 740         case TW_IOCTL_GET_COMPATIBILITY_INFO:
 741                 tw_ioctl->driver_command.status = 0;
 742                 /* Copy compatibility struct into ioctl data buffer */
 743                 tw_compat_info = (TW_Compatibility_Info *)tw_ioctl->data_buffer;
 744                 memcpy(tw_compat_info, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info));
 745                 break;
 746         case TW_IOCTL_GET_LAST_EVENT:
 747                 if (tw_dev->event_queue_wrapped) {
 748                         if (tw_dev->aen_clobber) {
 749                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 750                                 tw_dev->aen_clobber = 0;
 751                         } else
 752                                 tw_ioctl->driver_command.status = 0;
 753                 } else {
 754                         if (!tw_dev->error_index) {
 755                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 756                                 break;
 757                         }
 758                         tw_ioctl->driver_command.status = 0;
 759                 }
 760                 event_index = (tw_dev->error_index - 1 + TW_Q_LENGTH) % TW_Q_LENGTH;
 761                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 762                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 763                 break;
 764         case TW_IOCTL_GET_FIRST_EVENT:
 765                 if (tw_dev->event_queue_wrapped) {
 766                         if (tw_dev->aen_clobber) {
 767                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 768                                 tw_dev->aen_clobber = 0;
 769                         } else
 770                                 tw_ioctl->driver_command.status = 0;
 771                         event_index = tw_dev->error_index;
 772                 } else {
 773                         if (!tw_dev->error_index) {
 774                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 775                                 break;
 776                         }
 777                         tw_ioctl->driver_command.status = 0;
 778                         event_index = 0;
 779                 }
 780                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 781                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 782                 break;
 783         case TW_IOCTL_GET_NEXT_EVENT:
 784                 event = (TW_Event *)tw_ioctl->data_buffer;
 785                 sequence_id = event->sequence_id;
 786                 tw_ioctl->driver_command.status = 0;
 787
 788                 if (tw_dev->event_queue_wrapped) {
 789                         if (tw_dev->aen_clobber) {
 790                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 791                                 tw_dev->aen_clobber = 0;
 792                         }
 793                         start_index = tw_dev->error_index;
 794                 } else {
 795                         if (!tw_dev->error_index) {
 796                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 797                                 break;
 798                         }
 799                         start_index = 0;
 800                 }
 801                 event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id + 1) % TW_Q_LENGTH;
 802
 803                 if (!(tw_dev->event_queue[event_index]->sequence_id > sequence_id)) {
 804                         if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
 805                                 tw_dev->aen_clobber = 1;
 806                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 807                         break;
 808                 }
 809                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 810                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 811                 break;
 812         case TW_IOCTL_GET_PREVIOUS_EVENT:
 813                 event = (TW_Event *)tw_ioctl->data_buffer;
 814                 sequence_id = event->sequence_id;
 815                 tw_ioctl->driver_command.status = 0;
 816
 817                 if (tw_dev->event_queue_wrapped) {
 818                         if (tw_dev->aen_clobber) {
 819                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_AEN_CLOBBER;
 820                                 tw_dev->aen_clobber = 0;
 821                         }
 822                         start_index = tw_dev->error_index;
 823                 } else {
 824                         if (!tw_dev->error_index) {
 825                                 tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 826                                 break;
 827                         }
 828                         start_index = 0;
 829                 }
 830                 event_index = (start_index + sequence_id - tw_dev->event_queue[start_index]->sequence_id - 1) % TW_Q_LENGTH;
 831
 832                 if (!(tw_dev->event_queue[event_index]->sequence_id < sequence_id)) {
 833                         if (tw_ioctl->driver_command.status == TW_IOCTL_ERROR_STATUS_AEN_CLOBBER)
 834                                 tw_dev->aen_clobber = 1;
 835                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NO_MORE_EVENTS;
 836                         break;
 837                 }
 838                 memcpy(tw_ioctl->data_buffer, tw_dev->event_queue[event_index], sizeof(TW_Event));
 839                 tw_dev->event_queue[event_index]->retrieved = TW_AEN_RETRIEVED;
 840                 break;
 841         case TW_IOCTL_GET_LOCK:
 842                 tw_lock = (TW_Lock *)tw_ioctl->data_buffer;
 843                 current_time = ktime_get();
 844
 845                 if ((tw_lock->force_flag == 1) || (tw_dev->ioctl_sem_lock == 0) ||
 846                     ktime_after(current_time, tw_dev->ioctl_time)) {
 847                         tw_dev->ioctl_sem_lock = 1;
 848                         tw_dev->ioctl_time = ktime_add_ms(current_time, tw_lock->timeout_msec);
 849                         tw_ioctl->driver_command.status = 0;
 850                         tw_lock->time_remaining_msec = tw_lock->timeout_msec;
 851                 } else {
 852                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_LOCKED;
 853                         tw_lock->time_remaining_msec = ktime_ms_delta(tw_dev->ioctl_time, current_time);
 854                 }
 855                 break;
 856         case TW_IOCTL_RELEASE_LOCK:
 857                 if (tw_dev->ioctl_sem_lock == 1) {
 858                         tw_dev->ioctl_sem_lock = 0;
 859                         tw_ioctl->driver_command.status = 0;
 860                 } else {
 861                         tw_ioctl->driver_command.status = TW_IOCTL_ERROR_STATUS_NOT_LOCKED;
 862                 }
 863                 break;
 864         default:
 865                 retval = TW_IOCTL_ERROR_OS_ENOTTY;
 866                 goto out3;
 867         }
 868
 869         /* Now copy the entire response to userspace */
 870         if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0)
 871                 retval = 0;
 872 out3:
 873         /* Now free ioctl buf memory */
 874         dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle);
 875 out2:
 876         mutex_unlock(&tw_dev->ioctl_lock);
 877 out:
 878         mutex_unlock(&twa_chrdev_mutex);
 879         return retval;
 880 } /* End twa_chrdev_ioctl() */
 881
 882 /* This function handles open for the character device */
 883 /* NOTE that this function will race with remove. */
 884 static int twa_chrdev_open(struct inode *inode, struct file *file)
 885 {
 886         unsigned int minor_number;
 887         int retval = TW_IOCTL_ERROR_OS_ENODEV;
 888
 889         if (!capable(CAP_SYS_ADMIN)) {
 890                 retval = -EACCES;
 891                 goto out;
 892         }
 893
 894         minor_number = iminor(inode);
 895         if (minor_number >= twa_device_extension_count)
 896                 goto out;
 897         retval = 0;
 898 out:
 899         return retval;
 900 } /* End twa_chrdev_open() */
 901
 902 /* This function will print readable messages from status register errors */
 903 static int twa_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value)
 904 {
 905         int retval = 1;
 906
 907         /* Check for various error conditions and handle them appropriately */
 908         if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
 909                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "PCI Parity Error: clearing");
 910                 writel(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
 911         }
 912
 913         if (status_reg_value & TW_STATUS_PCI_ABORT) {
 914                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "PCI Abort: clearing");
 915                 writel(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
 916                 pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
 917         }
 918
 919         if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
 920                 if (((tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9650SE) &&
 921                      (tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9690SA)) ||
 922                     (!test_bit(TW_IN_RESET, &tw_dev->flags)))
 923                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Controller Queue Error: clearing");
 924                 writel(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
 925         }
 926
 927         if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
 928                 if (tw_dev->reset_print == 0) {
 929                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Microcontroller Error: clearing");
 930                         tw_dev->reset_print = 1;
 931                 }
 932                 goto out;
 933         }
 934         retval = 0;
 935 out:
 936         return retval;
 937 } /* End twa_decode_bits() */
 938
 939 /* This function will empty the response queue */
 940 static int twa_empty_response_queue(TW_Device_Extension *tw_dev)
 941 {
 942         u32 status_reg_value, response_que_value;
 943         int count = 0, retval = 1;
 944
 945         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
 946
 947         while (((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) && (count < TW_MAX_RESPONSE_DRAIN)) {
 948                 response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
 949                 status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
 950                 count++;
 951         }
 952         if (count == TW_MAX_RESPONSE_DRAIN)
 953                 goto out;
 954
 955         retval = 0;
 956 out:
 957         return retval;
 958 } /* End twa_empty_response_queue() */
 959
 960 /* This function will clear the pchip/response queue on 9550SX */
 961 static int twa_empty_response_queue_large(TW_Device_Extension *tw_dev)
 962 {
 963         u32 response_que_value = 0;
 964         unsigned long before;
 965         int retval = 1;
 966
 967         if (tw_dev->tw_pci_dev->device != PCI_DEVICE_ID_3WARE_9000) {
 968                 before = jiffies;
 969                 while ((response_que_value & TW_9550SX_DRAIN_COMPLETED) != TW_9550SX_DRAIN_COMPLETED) {
 970                         response_que_value = readl(TW_RESPONSE_QUEUE_REG_ADDR_LARGE(tw_dev));
 971                         msleep(1);
 972                         if (time_after(jiffies, before + HZ * 30))
 973                                 goto out;
 974                 }
 975                 /* P-chip settle time */
 976                 msleep(500);
 977                 retval = 0;
 978         } else
 979                 retval = 0;
 980 out:
 981         return retval;
 982 } /* End twa_empty_response_queue_large() */
 983
 984 /* This function passes sense keys from firmware to scsi layer */
 985 static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_sense, int print_host)
 986 {
 987         TW_Command_Full *full_command_packet;
 988         unsigned short error;
 989         int retval = 1;
 990         char *error_str;
 991
 992         full_command_packet = tw_dev->command_packet_virt[request_id];
 993
 994         /* Check for embedded error string */
 995         error_str = &(full_command_packet->header.err_specific_desc[strlen(full_command_packet->header.err_specific_desc) + 1]);
 996
 997         /* Don't print error for Logical unit not supported during rollcall */
 998         error = le16_to_cpu(full_command_packet->header.status_block.error);
 999         if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE)) {
1000                 if (print_host)
1001                         printk(KERN_WARNING "3w-9xxx: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
1002                                tw_dev->host->host_no,
1003                                TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
1004                                full_command_packet->header.status_block.error,
1005                                error_str[0] == '\0' ?
1006                                twa_string_lookup(twa_error_table,
1007                                                  full_command_packet->header.status_block.error) : error_str,
1008                                full_command_packet->header.err_specific_desc);
1009                 else
1010                         printk(KERN_WARNING "3w-9xxx: ERROR: (0x%02X:0x%04X): %s:%s.\n",
1011                                TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
1012                                full_command_packet->header.status_block.error,
1013                                error_str[0] == '\0' ?
1014                                twa_string_lookup(twa_error_table,
1015                                                  full_command_packet->header.status_block.error) : error_str,
1016                                full_command_packet->header.err_specific_desc);
1017         }
1018
1019         if (copy_sense) {
1020                 memcpy(tw_dev->srb[request_id]->sense_buffer, full_command_packet->header.sense_data, TW_SENSE_DATA_LENGTH);
1021                 tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
1022                 retval = TW_ISR_DONT_RESULT;
1023                 goto out;
1024         }
1025         retval = 0;
1026 out:
1027         return retval;
1028 } /* End twa_fill_sense() */
1029
1030 /* This function will free up device extension resources */
1031 static void twa_free_device_extension(TW_Device_Extension *tw_dev)
1032 {
1033         if (tw_dev->command_packet_virt[0])
1034                 dma_free_coherent(&tw_dev->tw_pci_dev->dev,
1035                                 sizeof(TW_Command_Full) * TW_Q_LENGTH,
1036                                 tw_dev->command_packet_virt[0],
1037                                 tw_dev->command_packet_phys[0]);
1038
1039         if (tw_dev->generic_buffer_virt[0])
1040                 dma_free_coherent(&tw_dev->tw_pci_dev->dev,
1041                                 TW_SECTOR_SIZE * TW_Q_LENGTH,
1042                                 tw_dev->generic_buffer_virt[0],
1043                                 tw_dev->generic_buffer_phys[0]);
1044
1045         kfree(tw_dev->event_queue[0]);
1046 } /* End twa_free_device_extension() */
1047
1048 /* This function will free a request id */
1049 static void twa_free_request_id(TW_Device_Extension *tw_dev, int request_id)
1050 {
1051         tw_dev->free_queue[tw_dev->free_tail] = request_id;
1052         tw_dev->state[request_id] = TW_S_FINISHED;
1053         tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
1054 } /* End twa_free_request_id() */
1055
1056 /* This function will get parameter table entries from the firmware */
1057 static void *twa_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes)
1058 {
1059         TW_Command_Full *full_command_packet;
1060         TW_Command *command_packet;
1061         TW_Param_Apache *param;
1062         void *retval = NULL;
1063
1064         /* Setup the command packet */
1065         full_command_packet = tw_dev->command_packet_virt[request_id];
1066         memset(full_command_packet, 0, sizeof(TW_Command_Full));
1067         command_packet = &full_command_packet->command.oldcommand;
1068
1069         command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
1070         command_packet->size              = TW_COMMAND_SIZE;
1071         command_packet->request_id        = request_id;
1072         command_packet->byte6_offset.block_count = cpu_to_le16(1);
1073
1074         /* Now setup the param */
1075         param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
1076         memset(param, 0, TW_SECTOR_SIZE);
1077         param->table_id = cpu_to_le16(table_id | 0x8000);
1078         param->parameter_id = cpu_to_le16(parameter_id);
1079         param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes);
1080
1081         command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
1082         command_packet->byte8_offset.param.sgl[0].length = cpu_to_le32(TW_SECTOR_SIZE);
1083
1084         /* Post the command packet to the board */
1085         twa_post_command_packet(tw_dev, request_id, 1);
1086
1087         /* Poll for completion */
1088         if (twa_poll_response(tw_dev, request_id, 30))
1089                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "No valid response during get param")
1090         else
1091                 retval = (void *)&(param->data[0]);
1092
1093         tw_dev->posted_request_count--;
1094         tw_dev->state[request_id] = TW_S_INITIAL;
1095
1096         return retval;
1097 } /* End twa_get_param() */
1098
1099 /* This function will assign an available request id */
1100 static void twa_get_request_id(TW_Device_Extension *tw_dev, int *request_id)
1101 {
1102         *request_id = tw_dev->free_queue[tw_dev->free_head];
1103         tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
1104         tw_dev->state[*request_id] = TW_S_STARTED;
1105 } /* End twa_get_request_id() */
1106
1107 /* This function will send an initconnection command to controller */
1108 static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
1109                               u32 set_features, unsigned short current_fw_srl,
1110                               unsigned short current_fw_arch_id,
1111                               unsigned short current_fw_branch,
1112                               unsigned short current_fw_build,
1113                               unsigned short *fw_on_ctlr_srl,
1114                               unsigned short *fw_on_ctlr_arch_id,
1115                               unsigned short *fw_on_ctlr_branch,
1116                               unsigned short *fw_on_ctlr_build,
1117                               u32 *init_connect_result)
1118 {
1119         TW_Command_Full *full_command_packet;
1120         TW_Initconnect *tw_initconnect;
1121         int request_id = 0, retval = 1;
1122
1123         /* Initialize InitConnection command packet */
1124         full_command_packet = tw_dev->command_packet_virt[request_id];
1125         memset(full_command_packet, 0, sizeof(TW_Command_Full));
1126         full_command_packet->header.header_desc.size_header = 128;
1127
1128         tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand;
1129         tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION);
1130         tw_initconnect->request_id = request_id;
1131         tw_initconnect->message_credits = cpu_to_le16(message_credits);
1132         tw_initconnect->features = set_features;
1133
1134         /* Turn on 64-bit sgl support if we need to */
1135         tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
1136
1137         tw_initconnect->features = cpu_to_le32(tw_initconnect->features);
1138
1139         if (set_features & TW_EXTENDED_INIT_CONNECT) {
1140                 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED;
1141                 tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl);
1142                 tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id);
1143                 tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch);
1144                 tw_initconnect->fw_build = cpu_to_le16(current_fw_build);
1145         } else
1146                 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE;
1147
1148         /* Send command packet to the board */
1149         twa_post_command_packet(tw_dev, request_id, 1);
1150
1151         /* Poll for completion */
1152         if (twa_poll_response(tw_dev, request_id, 30)) {
1153                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "No valid response during init connection");
1154         } else {
1155                 if (set_features & TW_EXTENDED_INIT_CONNECT) {
1156                         *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl);
1157                         *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id);
1158                         *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch);
1159                         *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build);
1160                         *init_connect_result = le32_to_cpu(tw_initconnect->result);
1161                 }
1162                 retval = 0;
1163         }
1164
1165         tw_dev->posted_request_count--;
1166         tw_dev->state[request_id] = TW_S_INITIAL;
1167
1168         return retval;
1169 } /* End twa_initconnection() */
1170
1171 /* This function will initialize the fields of a device extension */
1172 static int twa_initialize_device_extension(TW_Device_Extension *tw_dev)
1173 {
1174         int i, retval = 1;
1175
1176         /* Initialize command packet buffers */
1177         if (twa_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
1178                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Command packet memory allocation failed");
1179                 goto out;
1180         }
1181
1182         /* Initialize generic buffer */
1183         if (twa_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
1184                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x17, "Generic memory allocation failed");
1185                 goto out;
1186         }
1187
1188         /* Allocate event info space */
1189         tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL);
1190         if (!tw_dev->event_queue[0]) {
1191                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x18, "Event info memory allocation failed");
1192                 goto out;
1193         }
1194
1195
1196         for (i = 0; i < TW_Q_LENGTH; i++) {
1197                 tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event)));
1198                 tw_dev->free_queue[i] = i;
1199                 tw_dev->state[i] = TW_S_INITIAL;
1200         }
1201
1202         tw_dev->pending_head = TW_Q_START;
1203         tw_dev->pending_tail = TW_Q_START;
1204         tw_dev->free_head = TW_Q_START;
1205         tw_dev->free_tail = TW_Q_START;
1206         tw_dev->error_sequence_id = 1;
1207         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1208
1209         mutex_init(&tw_dev->ioctl_lock);
1210         init_waitqueue_head(&tw_dev->ioctl_wqueue);
1211
1212         retval = 0;
1213 out:
1214         return retval;
1215 } /* End twa_initialize_device_extension() */
1216
1217 /* This function is the interrupt service routine */
1218 static irqreturn_t twa_interrupt(int irq, void *dev_instance)
1219 {
1220         int request_id, error = 0;
1221         u32 status_reg_value;
1222         TW_Response_Queue response_que;
1223         TW_Command_Full *full_command_packet;
1224         TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
1225         int handled = 0;
1226
1227         /* Get the per adapter lock */
1228         spin_lock(tw_dev->host->host_lock);
1229
1230         /* Read the registers */
1231         status_reg_value = readl(TW_STATUS_REG_ADDR(tw_dev));
1232
1233         /* Check if this is our interrupt, otherwise bail */
1234         if (!(status_reg_value & TW_STATUS_VALID_INTERRUPT))
1235                 goto twa_interrupt_bail;
1236
1237         handled = 1;
1238
1239         /* If we are resetting, bail */
1240         if (test_bit(TW_IN_RESET, &tw_dev->flags))
1241                 goto twa_interrupt_bail;
1242
1243         /* Check controller for errors */
1244         if (twa_check_bits(status_reg_value)) {
1245                 if (twa_decode_bits(tw_dev, status_reg_value)) {
1246                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1247                         goto twa_interrupt_bail;
1248                 }
1249         }
1250
1251         /* Handle host interrupt */
1252         if (status_reg_value & TW_STATUS_HOST_INTERRUPT)
1253                 TW_CLEAR_HOST_INTERRUPT(tw_dev);
1254
1255         /* Handle attention interrupt */
1256         if (status_reg_value & TW_STATUS_ATTENTION_INTERRUPT) {
1257                 TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
1258                 if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
1259                         twa_get_request_id(tw_dev, &request_id);
1260
1261                         error = twa_aen_read_queue(tw_dev, request_id);
1262                         if (error) {
1263                                 tw_dev->state[request_id] = TW_S_COMPLETED;
1264                                 twa_free_request_id(tw_dev, request_id);
1265                                 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
1266                         }
1267                 }
1268         }
1269
1270         /* Handle command interrupt */
1271         if (status_reg_value & TW_STATUS_COMMAND_INTERRUPT) {
1272                 TW_MASK_COMMAND_INTERRUPT(tw_dev);
1273                 /* Drain as many pending commands as we can */
1274                 while (tw_dev->pending_request_count > 0) {
1275                         request_id = tw_dev->pending_queue[tw_dev->pending_head];
1276                         if (tw_dev->state[request_id] != TW_S_PENDING) {
1277                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x19, "Found request id that wasn't pending");
1278                                 TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1279                                 goto twa_interrupt_bail;
1280                         }
1281                         if (twa_post_command_packet(tw_dev, request_id, 1)==0) {
1282                                 tw_dev->pending_head = (tw_dev->pending_head + 1) % TW_Q_LENGTH;
1283                                 tw_dev->pending_request_count--;
1284                         } else {
1285                                 /* If we get here, we will continue re-posting on the next command interrupt */
1286                                 break;
1287                         }
1288                 }
1289         }
1290
1291         /* Handle response interrupt */
1292         if (status_reg_value & TW_STATUS_RESPONSE_INTERRUPT) {
1293
1294                 /* Drain the response queue from the board */
1295                 while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
1296                         /* Complete the response */
1297                         response_que.value = readl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
1298                         request_id = TW_RESID_OUT(response_que.response_id);
1299                         full_command_packet = tw_dev->command_packet_virt[request_id];
1300                         error = 0;
1301                         /* Check for command packet errors */
1302                         if (full_command_packet->command.newcommand.status != 0) {
1303                                 if (tw_dev->srb[request_id] != NULL) {
1304                                         error = twa_fill_sense(tw_dev, request_id, 1, 1);
1305                                 } else {
1306                                         /* Skip ioctl error prints */
1307                                         if (request_id != tw_dev->chrdev_request_id) {
1308                                                 error = twa_fill_sense(tw_dev, request_id, 0, 1);
1309                                         }
1310                                 }
1311                         }
1312
1313                         /* Check for correct state */
1314                         if (tw_dev->state[request_id] != TW_S_POSTED) {
1315                                 if (tw_dev->srb[request_id] != NULL) {
1316                                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Received a request id that wasn't posted");
1317                                         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1318                                         goto twa_interrupt_bail;
1319                                 }
1320                         }
1321
1322                         /* Check for internal command completion */
1323                         if (tw_dev->srb[request_id] == NULL) {
1324                                 if (request_id != tw_dev->chrdev_request_id) {
1325                                         if (twa_aen_complete(tw_dev, request_id))
1326                                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Error completing AEN during attention interrupt");
1327                                 } else {
1328                                         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1329                                         wake_up(&tw_dev->ioctl_wqueue);
1330                                 }
1331                         } else {
1332                                 struct scsi_cmnd *cmd;
1333
1334                                 cmd = tw_dev->srb[request_id];
1335
1336                                 twa_scsiop_execute_scsi_complete(tw_dev, request_id);
1337                                 /* If no error command was a success */
1338                                 if (error == 0) {
1339                                         cmd->result = (DID_OK << 16);
1340                                 }
1341
1342                                 /* If error, command failed */
1343                                 if (error == 1) {
1344                                         /* Ask for a host reset */
1345                                         cmd->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
1346                                 }
1347
1348                                 /* Report residual bytes for single sgl */
1349                                 if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) {
1350                                         if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id]))
1351                                                 scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length);
1352                                 }
1353
1354                                 /* Now complete the io */
1355                                 if (twa_command_mapped(cmd))
1356                                         scsi_dma_unmap(cmd);
1357                                 cmd->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                         cpu_to_le16(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) - 1);
1396                         newcommand->sg_list[0].length = cpu_to_le32(length);
1397                 }
1398                 newcommand->sgl_entries__lunh =
1399                         cpu_to_le16(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) - 1);
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                                 cmd->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         TW_Device_Extension *tw_dev;
1702
1703         tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1704
1705         if (capacity >= 0x200000) {
1706                 heads = 255;
1707                 sectors = 63;
1708                 cylinders = sector_div(capacity, heads * sectors);
1709         } else {
1710                 heads = 64;
1711                 sectors = 32;
1712                 cylinders = sector_div(capacity, heads * sectors);
1713         }
1714
1715         geom[0] = heads;
1716         geom[1] = sectors;
1717         geom[2] = cylinders;
1718
1719         return 0;
1720 } /* End twa_scsi_biosparam() */
1721
1722 /* This is the new scsi eh reset function */
1723 static int twa_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1724 {
1725         TW_Device_Extension *tw_dev = NULL;
1726         int retval = FAILED;
1727
1728         tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1729
1730         tw_dev->num_resets++;
1731
1732         sdev_printk(KERN_WARNING, SCpnt->device,
1733                 "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n",
1734                 TW_DRIVER, 0x2c, SCpnt->cmnd[0]);
1735
1736         /* Make sure we are not issuing an ioctl or resetting from ioctl */
1737         mutex_lock(&tw_dev->ioctl_lock);
1738
1739         /* Now reset the card and some of the device extension data */
1740         if (twa_reset_device_extension(tw_dev)) {
1741                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2b, "Controller reset failed during scsi host reset");
1742                 goto out;
1743         }
1744
1745         retval = SUCCESS;
1746 out:
1747         mutex_unlock(&tw_dev->ioctl_lock);
1748         return retval;
1749 } /* End twa_scsi_eh_reset() */
1750
1751 /* This is the main scsi queue function to handle scsi opcodes */
1752 static int twa_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1753 {
1754         int request_id, retval;
1755         TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1756
1757         /* If we are resetting due to timed out ioctl, report as busy */
1758         if (test_bit(TW_IN_RESET, &tw_dev->flags)) {
1759                 retval = SCSI_MLQUEUE_HOST_BUSY;
1760                 goto out;
1761         }
1762
1763         /* Check if this FW supports luns */
1764         if ((SCpnt->device->lun != 0) && (tw_dev->tw_compat_info.working_srl < TW_FW_SRL_LUNS_SUPPORTED)) {
1765                 SCpnt->result = (DID_BAD_TARGET << 16);
1766                 done(SCpnt);
1767                 retval = 0;
1768                 goto out;
1769         }
1770
1771         /* Save done function into scsi_cmnd struct */
1772         SCpnt->scsi_done = done;
1773
1774         /* Get a free request id */
1775         twa_get_request_id(tw_dev, &request_id);
1776
1777         /* Save the scsi command for use by the ISR */
1778         tw_dev->srb[request_id] = SCpnt;
1779
1780         retval = twa_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
1781         switch (retval) {
1782         case SCSI_MLQUEUE_HOST_BUSY:
1783                 if (twa_command_mapped(SCpnt))
1784                         scsi_dma_unmap(SCpnt);
1785                 twa_free_request_id(tw_dev, request_id);
1786                 break;
1787         case 1:
1788                 SCpnt->result = (DID_ERROR << 16);
1789                 if (twa_command_mapped(SCpnt))
1790                         scsi_dma_unmap(SCpnt);
1791                 done(SCpnt);
1792                 tw_dev->state[request_id] = TW_S_COMPLETED;
1793                 twa_free_request_id(tw_dev, request_id);
1794                 retval = 0;
1795         }
1796 out:
1797         return retval;
1798 } /* End twa_scsi_queue() */
1799
1800 static DEF_SCSI_QCMD(twa_scsi_queue)
1801
1802 /* This function hands scsi cdb's to the firmware */
1803 static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id,
1804                                    unsigned char *cdb, int use_sg,
1805                                    TW_SG_Entry *sglistarg)
1806 {
1807         TW_Command_Full *full_command_packet;
1808         TW_Command_Apache *command_packet;
1809         u32 num_sectors = 0x0;
1810         int i, sg_count;
1811         struct scsi_cmnd *srb = NULL;
1812         struct scatterlist *sglist = NULL, *sg;
1813         int retval = 1;
1814
1815         if (tw_dev->srb[request_id]) {
1816                 srb = tw_dev->srb[request_id];
1817                 if (scsi_sglist(srb))
1818                         sglist = scsi_sglist(srb);
1819         }
1820
1821         /* Initialize command packet */
1822         full_command_packet = tw_dev->command_packet_virt[request_id];
1823         full_command_packet->header.header_desc.size_header = 128;
1824         full_command_packet->header.status_block.error = 0;
1825         full_command_packet->header.status_block.severity__reserved = 0;
1826
1827         command_packet = &full_command_packet->command.newcommand;
1828         command_packet->status = 0;
1829         command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI);
1830
1831         /* We forced 16 byte cdb use earlier */
1832         if (!cdb)
1833                 memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN);
1834         else
1835                 memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN);
1836
1837         if (srb) {
1838                 command_packet->unit = srb->device->id;
1839                 command_packet->request_id__lunl =
1840                         cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id));
1841         } else {
1842                 command_packet->request_id__lunl =
1843                         cpu_to_le16(TW_REQ_LUN_IN(0, request_id));
1844                 command_packet->unit = 0;
1845         }
1846
1847         command_packet->sgl_offset = 16;
1848
1849         if (!sglistarg) {
1850                 /* Map sglist from scsi layer to cmd packet */
1851
1852                 if (scsi_sg_count(srb)) {
1853                         if (!twa_command_mapped(srb)) {
1854                                 if (srb->sc_data_direction == DMA_TO_DEVICE ||
1855                                     srb->sc_data_direction == DMA_BIDIRECTIONAL)
1856                                         scsi_sg_copy_to_buffer(srb,
1857                                                                tw_dev->generic_buffer_virt[request_id],
1858                                                                TW_SECTOR_SIZE);
1859                                 command_packet->sg_list[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
1860                                 command_packet->sg_list[0].length = cpu_to_le32(TW_MIN_SGL_LENGTH);
1861                         } else {
1862                                 sg_count = scsi_dma_map(srb);
1863                                 if (sg_count < 0)
1864                                         goto out;
1865
1866                                 scsi_for_each_sg(srb, sg, sg_count, i) {
1867                                         command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg));
1868                                         command_packet->sg_list[i].length = cpu_to_le32(sg_dma_len(sg));
1869                                         if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
1870                                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2e, "Found unaligned sgl address during execute scsi");
1871                                                 goto out;
1872                                         }
1873                                 }
1874                         }
1875                         command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id])));
1876                 }
1877         } else {
1878                 /* Internal cdb post */
1879                 for (i = 0; i < use_sg; i++) {
1880                         command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address);
1881                         command_packet->sg_list[i].length = cpu_to_le32(sglistarg[i].length);
1882                         if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
1883                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2f, "Found unaligned sgl address during internal post");
1884                                 goto out;
1885                         }
1886                 }
1887                 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg));
1888         }
1889
1890         if (srb) {
1891                 if (srb->cmnd[0] == READ_6 || srb->cmnd[0] == WRITE_6)
1892                         num_sectors = (u32)srb->cmnd[4];
1893
1894                 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10)
1895                         num_sectors = (u32)srb->cmnd[8] | ((u32)srb->cmnd[7] << 8);
1896         }
1897
1898         /* Update sector statistic */
1899         tw_dev->sector_count = num_sectors;
1900         if (tw_dev->sector_count > tw_dev->max_sector_count)
1901                 tw_dev->max_sector_count = tw_dev->sector_count;
1902
1903         /* Update SG statistics */
1904         if (srb) {
1905                 tw_dev->sgl_entries = scsi_sg_count(tw_dev->srb[request_id]);
1906                 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
1907                         tw_dev->max_sgl_entries = tw_dev->sgl_entries;
1908         }
1909
1910         /* Now post the command to the board */
1911         if (srb) {
1912                 retval = twa_post_command_packet(tw_dev, request_id, 0);
1913         } else {
1914                 twa_post_command_packet(tw_dev, request_id, 1);
1915                 retval = 0;
1916         }
1917 out:
1918         return retval;
1919 } /* End twa_scsiop_execute_scsi() */
1920
1921 /* This function completes an execute scsi operation */
1922 static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id)
1923 {
1924         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1925
1926         if (!twa_command_mapped(cmd) &&
1927             (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1928              cmd->sc_data_direction == DMA_BIDIRECTIONAL)) {
1929                 if (scsi_sg_count(cmd) == 1) {
1930                         void *buf = tw_dev->generic_buffer_virt[request_id];
1931
1932                         scsi_sg_copy_from_buffer(cmd, buf, TW_SECTOR_SIZE);
1933                 }
1934         }
1935 } /* End twa_scsiop_execute_scsi_complete() */
1936
1937 /* This function tells the controller to shut down */
1938 static void __twa_shutdown(TW_Device_Extension *tw_dev)
1939 {
1940         /* Disable interrupts */
1941         TW_DISABLE_INTERRUPTS(tw_dev);
1942
1943         /* Free up the IRQ */
1944         free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
1945
1946         printk(KERN_WARNING "3w-9xxx: Shutting down host %d.\n", tw_dev->host->host_no);
1947
1948         /* Tell the card we are shutting down */
1949         if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
1950                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x31, "Connection shutdown failed");
1951         } else {
1952                 printk(KERN_WARNING "3w-9xxx: Shutdown complete.\n");
1953         }
1954
1955         /* Clear all interrupts just before exit */
1956         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
1957 } /* End __twa_shutdown() */
1958
1959 /* Wrapper for __twa_shutdown */
1960 static void twa_shutdown(struct pci_dev *pdev)
1961 {
1962         struct Scsi_Host *host = pci_get_drvdata(pdev);
1963         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
1964
1965         __twa_shutdown(tw_dev);
1966 } /* End twa_shutdown() */
1967
1968 /* This function will look up a string */
1969 static char *twa_string_lookup(twa_message_type *table, unsigned int code)
1970 {
1971         int index;
1972
1973         for (index = 0; ((code != table[index].code) &&
1974                       (table[index].text != (char *)0)); index++);
1975         return(table[index].text);
1976 } /* End twa_string_lookup() */
1977
1978 /* This function gets called when a disk is coming on-line */
1979 static int twa_slave_configure(struct scsi_device *sdev)
1980 {
1981         /* Force 60 second timeout */
1982         blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
1983
1984         return 0;
1985 } /* End twa_slave_configure() */
1986
1987 /* scsi_host_template initializer */
1988 static struct scsi_host_template driver_template = {
1989         .module                 = THIS_MODULE,
1990         .name                   = "3ware 9000 Storage Controller",
1991         .queuecommand           = twa_scsi_queue,
1992         .eh_host_reset_handler  = twa_scsi_eh_reset,
1993         .bios_param             = twa_scsi_biosparam,
1994         .change_queue_depth     = scsi_change_queue_depth,
1995         .can_queue              = TW_Q_LENGTH-2,
1996         .slave_configure        = twa_slave_configure,
1997         .this_id                = -1,
1998         .sg_tablesize           = TW_APACHE_MAX_SGL_LENGTH,
1999         .max_sectors            = TW_MAX_SECTORS,
2000         .cmd_per_lun            = TW_MAX_CMDS_PER_LUN,
2001         .shost_attrs            = twa_host_attrs,
2002         .emulated               = 1,
2003         .no_write_same          = 1,
2004 };
2005
2006 /* This function will probe and initialize a card */
2007 static int twa_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
2008 {
2009         struct Scsi_Host *host = NULL;
2010         TW_Device_Extension *tw_dev;
2011         unsigned long mem_addr, mem_len;
2012         int retval;
2013
2014         retval = pci_enable_device(pdev);
2015         if (retval) {
2016                 TW_PRINTK(host, TW_DRIVER, 0x34, "Failed to enable pci device");
2017                 goto out_disable_device;
2018         }
2019
2020         pci_set_master(pdev);
2021         pci_try_set_mwi(pdev);
2022
2023         retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2024         if (retval)
2025                 retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2026         if (retval) {
2027                 TW_PRINTK(host, TW_DRIVER, 0x23, "Failed to set dma mask");
2028                 retval = -ENODEV;
2029                 goto out_disable_device;
2030         }
2031
2032         host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
2033         if (!host) {
2034                 TW_PRINTK(host, TW_DRIVER, 0x24, "Failed to allocate memory for device extension");
2035                 retval = -ENOMEM;
2036                 goto out_disable_device;
2037         }
2038         tw_dev = (TW_Device_Extension *)host->hostdata;
2039
2040         /* Save values to device extension */
2041         tw_dev->host = host;
2042         tw_dev->tw_pci_dev = pdev;
2043
2044         if (twa_initialize_device_extension(tw_dev)) {
2045                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x25, "Failed to initialize device extension");
2046                 retval = -ENOMEM;
2047                 goto out_free_device_extension;
2048         }
2049
2050         /* Request IO regions */
2051         retval = pci_request_regions(pdev, "3w-9xxx");
2052         if (retval) {
2053                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Failed to get mem region");
2054                 goto out_free_device_extension;
2055         }
2056
2057         if (pdev->device == PCI_DEVICE_ID_3WARE_9000) {
2058                 mem_addr = pci_resource_start(pdev, 1);
2059                 mem_len = pci_resource_len(pdev, 1);
2060         } else {
2061                 mem_addr = pci_resource_start(pdev, 2);
2062                 mem_len = pci_resource_len(pdev, 2);
2063         }
2064
2065         /* Save base address */
2066         tw_dev->base_addr = ioremap(mem_addr, mem_len);
2067         if (!tw_dev->base_addr) {
2068                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x35, "Failed to ioremap");
2069                 retval = -ENOMEM;
2070                 goto out_release_mem_region;
2071         }
2072
2073         /* Disable interrupts on the card */
2074         TW_DISABLE_INTERRUPTS(tw_dev);
2075
2076         /* Initialize the card */
2077         if (twa_reset_sequence(tw_dev, 0)) {
2078                 retval = -ENOMEM;
2079                 goto out_iounmap;
2080         }
2081
2082         /* Set host specific parameters */
2083         if ((pdev->device == PCI_DEVICE_ID_3WARE_9650SE) ||
2084             (pdev->device == PCI_DEVICE_ID_3WARE_9690SA))
2085                 host->max_id = TW_MAX_UNITS_9650SE;
2086         else
2087                 host->max_id = TW_MAX_UNITS;
2088
2089         host->max_cmd_len = TW_MAX_CDB_LEN;
2090
2091         /* Channels aren't supported by adapter */
2092         host->max_lun = TW_MAX_LUNS(tw_dev->tw_compat_info.working_srl);
2093         host->max_channel = 0;
2094
2095         /* Register the card with the kernel SCSI layer */
2096         retval = scsi_add_host(host, &pdev->dev);
2097         if (retval) {
2098                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x27, "scsi add host failed");
2099                 goto out_iounmap;
2100         }
2101
2102         pci_set_drvdata(pdev, host);
2103
2104         printk(KERN_WARNING "3w-9xxx: scsi%d: Found a 3ware 9000 Storage Controller at 0x%lx, IRQ: %d.\n",
2105                host->host_no, mem_addr, pdev->irq);
2106         printk(KERN_WARNING "3w-9xxx: scsi%d: Firmware %s, BIOS %s, Ports: %d.\n",
2107                host->host_no,
2108                (char *)twa_get_param(tw_dev, 0, TW_VERSION_TABLE,
2109                                      TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
2110                (char *)twa_get_param(tw_dev, 1, TW_VERSION_TABLE,
2111                                      TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
2112                le32_to_cpu(*(int *)twa_get_param(tw_dev, 2, TW_INFORMATION_TABLE,
2113                                      TW_PARAM_PORTCOUNT, TW_PARAM_PORTCOUNT_LENGTH)));
2114
2115         /* Try to enable MSI */
2116         if (use_msi && (pdev->device != PCI_DEVICE_ID_3WARE_9000) &&
2117             !pci_enable_msi(pdev))
2118                 set_bit(TW_USING_MSI, &tw_dev->flags);
2119
2120         /* Now setup the interrupt handler */
2121         retval = request_irq(pdev->irq, twa_interrupt, IRQF_SHARED, "3w-9xxx", tw_dev);
2122         if (retval) {
2123                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x30, "Error requesting IRQ");
2124                 goto out_remove_host;
2125         }
2126
2127         twa_device_extension_list[twa_device_extension_count] = tw_dev;
2128         twa_device_extension_count++;
2129
2130         /* Re-enable interrupts on the card */
2131         TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2132
2133         /* Finally, scan the host */
2134         scsi_scan_host(host);
2135
2136         if (twa_major == -1) {
2137                 if ((twa_major = register_chrdev (0, "twa", &twa_fops)) < 0)
2138                         TW_PRINTK(host, TW_DRIVER, 0x29, "Failed to register character device");
2139         }
2140         return 0;
2141
2142 out_remove_host:
2143         if (test_bit(TW_USING_MSI, &tw_dev->flags))
2144                 pci_disable_msi(pdev);
2145         scsi_remove_host(host);
2146 out_iounmap:
2147         iounmap(tw_dev->base_addr);
2148 out_release_mem_region:
2149         pci_release_regions(pdev);
2150 out_free_device_extension:
2151         twa_free_device_extension(tw_dev);
2152         scsi_host_put(host);
2153 out_disable_device:
2154         pci_disable_device(pdev);
2155
2156         return retval;
2157 } /* End twa_probe() */
2158
2159 /* This function is called to remove a device */
2160 static void twa_remove(struct pci_dev *pdev)
2161 {
2162         struct Scsi_Host *host = pci_get_drvdata(pdev);
2163         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2164
2165         scsi_remove_host(tw_dev->host);
2166
2167         /* Unregister character device */
2168         if (twa_major >= 0) {
2169                 unregister_chrdev(twa_major, "twa");
2170                 twa_major = -1;
2171         }
2172
2173         /* Shutdown the card */
2174         __twa_shutdown(tw_dev);
2175
2176         /* Disable MSI if enabled */
2177         if (test_bit(TW_USING_MSI, &tw_dev->flags))
2178                 pci_disable_msi(pdev);
2179
2180         /* Free IO remapping */
2181         iounmap(tw_dev->base_addr);
2182
2183         /* Free up the mem region */
2184         pci_release_regions(pdev);
2185
2186         /* Free up device extension resources */
2187         twa_free_device_extension(tw_dev);
2188
2189         scsi_host_put(tw_dev->host);
2190         pci_disable_device(pdev);
2191         twa_device_extension_count--;
2192 } /* End twa_remove() */
2193
2194 /* This function is called on PCI suspend */
2195 static int __maybe_unused twa_suspend(struct device *dev)
2196 {
2197         struct pci_dev *pdev = to_pci_dev(dev);
2198         struct Scsi_Host *host = pci_get_drvdata(pdev);
2199         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2200
2201         printk(KERN_WARNING "3w-9xxx: Suspending host %d.\n", tw_dev->host->host_no);
2202
2203         TW_DISABLE_INTERRUPTS(tw_dev);
2204         free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
2205
2206         if (test_bit(TW_USING_MSI, &tw_dev->flags))
2207                 pci_disable_msi(pdev);
2208
2209         /* Tell the card we are shutting down */
2210         if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
2211                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x38, "Connection shutdown failed during suspend");
2212         } else {
2213                 printk(KERN_WARNING "3w-9xxx: Suspend complete.\n");
2214         }
2215         TW_CLEAR_ALL_INTERRUPTS(tw_dev);
2216
2217         return 0;
2218 } /* End twa_suspend() */
2219
2220 /* This function is called on PCI resume */
2221 static int __maybe_unused twa_resume(struct device *dev)
2222 {
2223         int retval = 0;
2224         struct pci_dev *pdev = to_pci_dev(dev);
2225         struct Scsi_Host *host = pci_get_drvdata(pdev);
2226         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
2227
2228         printk(KERN_WARNING "3w-9xxx: Resuming host %d.\n", tw_dev->host->host_no);
2229
2230         pci_try_set_mwi(pdev);
2231
2232         retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2233         if (retval)
2234                 retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2235         if (retval) {
2236                 TW_PRINTK(host, TW_DRIVER, 0x40, "Failed to set dma mask during resume");
2237                 retval = -ENODEV;
2238                 goto out_disable_device;
2239         }
2240
2241         /* Initialize the card */
2242         if (twa_reset_sequence(tw_dev, 0)) {
2243                 retval = -ENODEV;
2244                 goto out_disable_device;
2245         }
2246
2247         /* Now setup the interrupt handler */
2248         retval = request_irq(pdev->irq, twa_interrupt, IRQF_SHARED, "3w-9xxx", tw_dev);
2249         if (retval) {
2250                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x42, "Error requesting IRQ during resume");
2251                 retval = -ENODEV;
2252                 goto out_disable_device;
2253         }
2254
2255         /* Now enable MSI if enabled */
2256         if (test_bit(TW_USING_MSI, &tw_dev->flags))
2257                 pci_enable_msi(pdev);
2258
2259         /* Re-enable interrupts on the card */
2260         TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
2261
2262         printk(KERN_WARNING "3w-9xxx: Resume complete.\n");
2263         return 0;
2264
2265 out_disable_device:
2266         scsi_remove_host(host);
2267
2268         return retval;
2269 } /* End twa_resume() */
2270
2271 /* PCI Devices supported by this driver */
2272 static struct pci_device_id twa_pci_tbl[] = {
2273         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9000,
2274           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2275         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9550SX,
2276           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2277         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9650SE,
2278           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2279         { PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9690SA,
2280           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2281         { }
2282 };
2283 MODULE_DEVICE_TABLE(pci, twa_pci_tbl);
2284
2285 static SIMPLE_DEV_PM_OPS(twa_pm_ops, twa_suspend, twa_resume);
2286
2287 /* pci_driver initializer */
2288 static struct pci_driver twa_driver = {
2289         .name           = "3w-9xxx",
2290         .id_table       = twa_pci_tbl,
2291         .probe          = twa_probe,
2292         .remove         = twa_remove,
2293         .driver.pm      = &twa_pm_ops,
2294         .shutdown       = twa_shutdown
2295 };
2296
2297 /* This function is called on driver initialization */
2298 static int __init twa_init(void)
2299 {
2300         printk(KERN_WARNING "3ware 9000 Storage Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
2301
2302         return pci_register_driver(&twa_driver);
2303 } /* End twa_init() */
2304
2305 /* This function is called on driver exit */
2306 static void __exit twa_exit(void)
2307 {
2308         pci_unregister_driver(&twa_driver);
2309 } /* End twa_exit() */
2310
2311 module_init(twa_init);
2312 module_exit(twa_exit);
2313