drivers/scsi/esas2r/esas2r_main.c

   1 /*
   2  *  linux/drivers/scsi/esas2r/esas2r_main.c
   3  *      For use with ATTO ExpressSAS R6xx SAS/SATA RAID controllers
   4  *
   5  *  Copyright (c) 2001-2013 ATTO Technology, Inc.
   6  *  (mailto:linuxdrivers@attotech.com)
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * NO WARRANTY
  19  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  20  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  21  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  22  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  23  * solely responsible for determining the appropriateness of using and
  24  * distributing the Program and assumes all risks associated with its
  25  * exercise of rights under this Agreement, including but not limited to
  26  * the risks and costs of program errors, damage to or loss of data,
  27  * programs or equipment, and unavailability or interruption of operations.
  28  *
  29  * DISCLAIMER OF LIABILITY
  30  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  31  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  33  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  35  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  36  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  37  *
  38  * You should have received a copy of the GNU General Public License
  39  * along with this program; if not, write to the Free Software
  40  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  41  * USA.
  42  */
  43
  44 #include "esas2r.h"
  45
  46 MODULE_DESCRIPTION(ESAS2R_DRVR_NAME ": " ESAS2R_LONGNAME " driver");
  47 MODULE_AUTHOR("ATTO Technology, Inc.");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(ESAS2R_VERSION_STR);
  50
  51 /* global definitions */
  52
  53 static int found_adapters;
  54 struct esas2r_adapter *esas2r_adapters[MAX_ADAPTERS];
  55
  56 #define ESAS2R_VDA_EVENT_PORT1       54414
  57 #define ESAS2R_VDA_EVENT_PORT2       54415
  58 #define ESAS2R_VDA_EVENT_SOCK_COUNT  2
  59
  60 static struct esas2r_adapter *esas2r_adapter_from_kobj(struct kobject *kobj)
  61 {
  62         struct device *dev = container_of(kobj, struct device, kobj);
  63         struct Scsi_Host *host = class_to_shost(dev);
  64
  65         return (struct esas2r_adapter *)host->hostdata;
  66 }
  67
  68 static ssize_t read_fw(struct file *file, struct kobject *kobj,
  69                        struct bin_attribute *attr,
  70                        char *buf, loff_t off, size_t count)
  71 {
  72         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
  73
  74         return esas2r_read_fw(a, buf, off, count);
  75 }
  76
  77 static ssize_t write_fw(struct file *file, struct kobject *kobj,
  78                         struct bin_attribute *attr,
  79                         char *buf, loff_t off, size_t count)
  80 {
  81         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
  82
  83         return esas2r_write_fw(a, buf, off, count);
  84 }
  85
  86 static ssize_t read_fs(struct file *file, struct kobject *kobj,
  87                        struct bin_attribute *attr,
  88                        char *buf, loff_t off, size_t count)
  89 {
  90         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
  91
  92         return esas2r_read_fs(a, buf, off, count);
  93 }
  94
  95 static ssize_t write_fs(struct file *file, struct kobject *kobj,
  96                         struct bin_attribute *attr,
  97                         char *buf, loff_t off, size_t count)
  98 {
  99         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 100         int length = min(sizeof(struct esas2r_ioctl_fs), count);
 101         int result = 0;
 102
 103         result = esas2r_write_fs(a, buf, off, count);
 104
 105         if (result < 0)
 106                 result = 0;
 107
 108         return length;
 109 }
 110
 111 static ssize_t read_vda(struct file *file, struct kobject *kobj,
 112                         struct bin_attribute *attr,
 113                         char *buf, loff_t off, size_t count)
 114 {
 115         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 116
 117         return esas2r_read_vda(a, buf, off, count);
 118 }
 119
 120 static ssize_t write_vda(struct file *file, struct kobject *kobj,
 121                          struct bin_attribute *attr,
 122                          char *buf, loff_t off, size_t count)
 123 {
 124         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 125
 126         return esas2r_write_vda(a, buf, off, count);
 127 }
 128
 129 static ssize_t read_live_nvram(struct file *file, struct kobject *kobj,
 130                                struct bin_attribute *attr,
 131                                char *buf, loff_t off, size_t count)
 132 {
 133         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 134         int length = min_t(size_t, sizeof(struct esas2r_sas_nvram), PAGE_SIZE);
 135
 136         memcpy(buf, a->nvram, length);
 137         return length;
 138 }
 139
 140 static ssize_t write_live_nvram(struct file *file, struct kobject *kobj,
 141                                 struct bin_attribute *attr,
 142                                 char *buf, loff_t off, size_t count)
 143 {
 144         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 145         struct esas2r_request *rq;
 146         int result = -EFAULT;
 147
 148         rq = esas2r_alloc_request(a);
 149         if (rq == NULL)
 150                 return -ENOMEM;
 151
 152         if (esas2r_write_params(a, rq, (struct esas2r_sas_nvram *)buf))
 153                 result = count;
 154
 155         esas2r_free_request(a, rq);
 156
 157         return result;
 158 }
 159
 160 static ssize_t read_default_nvram(struct file *file, struct kobject *kobj,
 161                                   struct bin_attribute *attr,
 162                                   char *buf, loff_t off, size_t count)
 163 {
 164         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 165
 166         esas2r_nvram_get_defaults(a, (struct esas2r_sas_nvram *)buf);
 167
 168         return sizeof(struct esas2r_sas_nvram);
 169 }
 170
 171 static ssize_t read_hw(struct file *file, struct kobject *kobj,
 172                        struct bin_attribute *attr,
 173                        char *buf, loff_t off, size_t count)
 174 {
 175         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 176         int length = min_t(size_t, sizeof(struct atto_ioctl), PAGE_SIZE);
 177
 178         if (!a->local_atto_ioctl)
 179                 return -ENOMEM;
 180
 181         if (handle_hba_ioctl(a, a->local_atto_ioctl) != IOCTL_SUCCESS)
 182                 return -ENOMEM;
 183
 184         memcpy(buf, a->local_atto_ioctl, length);
 185
 186         return length;
 187 }
 188
 189 static ssize_t write_hw(struct file *file, struct kobject *kobj,
 190                         struct bin_attribute *attr,
 191                         char *buf, loff_t off, size_t count)
 192 {
 193         struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
 194         int length = min(sizeof(struct atto_ioctl), count);
 195
 196         if (!a->local_atto_ioctl) {
 197                 a->local_atto_ioctl = kmalloc(sizeof(struct atto_ioctl),
 198                                               GFP_KERNEL);
 199                 if (a->local_atto_ioctl == NULL) {
 200                         esas2r_log(ESAS2R_LOG_WARN,
 201                                    "write_hw kzalloc failed for %zu bytes",
 202                                    sizeof(struct atto_ioctl));
 203                         return -ENOMEM;
 204                 }
 205         }
 206
 207         memset(a->local_atto_ioctl, 0, sizeof(struct atto_ioctl));
 208         memcpy(a->local_atto_ioctl, buf, length);
 209
 210         return length;
 211 }
 212
 213 #define ESAS2R_RW_BIN_ATTR(_name) \
 214         struct bin_attribute bin_attr_ ## _name = { \
 215                 .attr   = \
 216                 { .name = __stringify(_name), .mode  = S_IRUSR | S_IWUSR }, \
 217                 .size   = 0, \
 218                 .read   = read_ ## _name, \
 219                 .write  = write_ ## _name }
 220
 221 ESAS2R_RW_BIN_ATTR(fw);
 222 ESAS2R_RW_BIN_ATTR(fs);
 223 ESAS2R_RW_BIN_ATTR(vda);
 224 ESAS2R_RW_BIN_ATTR(hw);
 225 ESAS2R_RW_BIN_ATTR(live_nvram);
 226
 227 struct bin_attribute bin_attr_default_nvram = {
 228         .attr   = { .name = "default_nvram", .mode = S_IRUGO },
 229         .size   = 0,
 230         .read   = read_default_nvram,
 231         .write  = NULL
 232 };
 233
 234 static struct scsi_host_template driver_template = {
 235         .module                         = THIS_MODULE,
 236         .show_info                      = esas2r_show_info,
 237         .name                           = ESAS2R_LONGNAME,
 238         .info                           = esas2r_info,
 239         .ioctl                          = esas2r_ioctl,
 240         .queuecommand                   = esas2r_queuecommand,
 241         .eh_abort_handler               = esas2r_eh_abort,
 242         .eh_device_reset_handler        = esas2r_device_reset,
 243         .eh_bus_reset_handler           = esas2r_bus_reset,
 244         .eh_host_reset_handler          = esas2r_host_reset,
 245         .eh_target_reset_handler        = esas2r_target_reset,
 246         .can_queue                      = 128,
 247         .this_id                        = -1,
 248         .sg_tablesize                   = SG_CHUNK_SIZE,
 249         .cmd_per_lun                    =
 250                 ESAS2R_DEFAULT_CMD_PER_LUN,
 251         .present                        = 0,
 252         .emulated                       = 0,
 253         .proc_name                      = ESAS2R_DRVR_NAME,
 254         .change_queue_depth             = scsi_change_queue_depth,
 255         .max_sectors                    = 0xFFFF,
 256 };
 257
 258 int sgl_page_size = 512;
 259 module_param(sgl_page_size, int, 0);
 260 MODULE_PARM_DESC(sgl_page_size,
 261                  "Scatter/gather list (SGL) page size in number of S/G "
 262                  "entries.  If your application is doing a lot of very large "
 263                  "transfers, you may want to increase the SGL page size.  "
 264                  "Default 512.");
 265
 266 int num_sg_lists = 1024;
 267 module_param(num_sg_lists, int, 0);
 268 MODULE_PARM_DESC(num_sg_lists,
 269                  "Number of scatter/gather lists.  Default 1024.");
 270
 271 int sg_tablesize = SG_CHUNK_SIZE;
 272 module_param(sg_tablesize, int, 0);
 273 MODULE_PARM_DESC(sg_tablesize,
 274                  "Maximum number of entries in a scatter/gather table.");
 275
 276 int num_requests = 256;
 277 module_param(num_requests, int, 0);
 278 MODULE_PARM_DESC(num_requests,
 279                  "Number of requests.  Default 256.");
 280
 281 int num_ae_requests = 4;
 282 module_param(num_ae_requests, int, 0);
 283 MODULE_PARM_DESC(num_ae_requests,
 284                  "Number of VDA asynchronous event requests.  Default 4.");
 285
 286 int cmd_per_lun = ESAS2R_DEFAULT_CMD_PER_LUN;
 287 module_param(cmd_per_lun, int, 0);
 288 MODULE_PARM_DESC(cmd_per_lun,
 289                  "Maximum number of commands per LUN.  Default "
 290                  DEFINED_NUM_TO_STR(ESAS2R_DEFAULT_CMD_PER_LUN) ".");
 291
 292 int can_queue = 128;
 293 module_param(can_queue, int, 0);
 294 MODULE_PARM_DESC(can_queue,
 295                  "Maximum number of commands per adapter.  Default 128.");
 296
 297 int esas2r_max_sectors = 0xFFFF;
 298 module_param(esas2r_max_sectors, int, 0);
 299 MODULE_PARM_DESC(esas2r_max_sectors,
 300                  "Maximum number of disk sectors in a single data transfer.  "
 301                  "Default 65535 (largest possible setting).");
 302
 303 int interrupt_mode = 1;
 304 module_param(interrupt_mode, int, 0);
 305 MODULE_PARM_DESC(interrupt_mode,
 306                  "Defines the interrupt mode to use.  0 for legacy"
 307                  ", 1 for MSI.  Default is MSI (1).");
 308
 309 static const struct pci_device_id
 310         esas2r_pci_table[] = {
 311         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x0049,
 312           0,
 313           0, 0 },
 314         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004A,
 315           0,
 316           0, 0 },
 317         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004B,
 318           0,
 319           0, 0 },
 320         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004C,
 321           0,
 322           0, 0 },
 323         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004D,
 324           0,
 325           0, 0 },
 326         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004E,
 327           0,
 328           0, 0 },
 329         { 0,              0,              0,              0,
 330           0,
 331           0, 0 }
 332 };
 333
 334 MODULE_DEVICE_TABLE(pci, esas2r_pci_table);
 335
 336 static int
 337 esas2r_probe(struct pci_dev *pcid, const struct pci_device_id *id);
 338
 339 static void
 340 esas2r_remove(struct pci_dev *pcid);
 341
 342 static struct pci_driver
 343         esas2r_pci_driver = {
 344         .name           = ESAS2R_DRVR_NAME,
 345         .id_table       = esas2r_pci_table,
 346         .probe          = esas2r_probe,
 347         .remove         = esas2r_remove,
 348         .driver.pm      = &esas2r_pm_ops,
 349 };
 350
 351 static int esas2r_probe(struct pci_dev *pcid,
 352                         const struct pci_device_id *id)
 353 {
 354         struct Scsi_Host *host = NULL;
 355         struct esas2r_adapter *a;
 356         int err;
 357
 358         size_t host_alloc_size = sizeof(struct esas2r_adapter)
 359                                  + ((num_requests) +
 360                                     1) * sizeof(struct esas2r_request);
 361
 362         esas2r_log_dev(ESAS2R_LOG_DEBG, &(pcid->dev),
 363                        "esas2r_probe() 0x%02x 0x%02x 0x%02x 0x%02x",
 364                        pcid->vendor,
 365                        pcid->device,
 366                        pcid->subsystem_vendor,
 367                        pcid->subsystem_device);
 368
 369         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 370                        "before pci_enable_device() "
 371                        "enable_cnt: %d",
 372                        pcid->enable_cnt.counter);
 373
 374         err = pci_enable_device(pcid);
 375         if (err != 0) {
 376                 esas2r_log_dev(ESAS2R_LOG_CRIT, &(pcid->dev),
 377                                "pci_enable_device() FAIL (%d)",
 378                                err);
 379                 return -ENODEV;
 380         }
 381
 382         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 383                        "pci_enable_device() OK");
 384         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 385                        "after pci_enable_device() enable_cnt: %d",
 386                        pcid->enable_cnt.counter);
 387
 388         host = scsi_host_alloc(&driver_template, host_alloc_size);
 389         if (host == NULL) {
 390                 esas2r_log(ESAS2R_LOG_CRIT, "scsi_host_alloc() FAIL");
 391                 return -ENODEV;
 392         }
 393
 394         memset(host->hostdata, 0, host_alloc_size);
 395
 396         a = (struct esas2r_adapter *)host->hostdata;
 397
 398         esas2r_log(ESAS2R_LOG_INFO, "scsi_host_alloc() OK host: %p", host);
 399
 400         /* override max LUN and max target id */
 401
 402         host->max_id = ESAS2R_MAX_ID + 1;
 403         host->max_lun = 255;
 404
 405         /* we can handle 16-byte CDbs */
 406
 407         host->max_cmd_len = 16;
 408
 409         host->can_queue = can_queue;
 410         host->cmd_per_lun = cmd_per_lun;
 411         host->this_id = host->max_id + 1;
 412         host->max_channel = 0;
 413         host->unique_id = found_adapters;
 414         host->sg_tablesize = sg_tablesize;
 415         host->max_sectors = esas2r_max_sectors;
 416
 417         /* set to bus master for BIOses that don't do it for us */
 418
 419         esas2r_log(ESAS2R_LOG_INFO, "pci_set_master() called");
 420
 421         pci_set_master(pcid);
 422
 423         if (!esas2r_init_adapter(host, pcid, found_adapters)) {
 424                 esas2r_log(ESAS2R_LOG_CRIT,
 425                            "unable to initialize device at PCI bus %x:%x",
 426                            pcid->bus->number,
 427                            pcid->devfn);
 428
 429                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 430                                "scsi_host_put() called");
 431
 432                 scsi_host_put(host);
 433
 434                 return 0;
 435
 436         }
 437
 438         esas2r_log(ESAS2R_LOG_INFO, "pci_set_drvdata(%p, %p) called", pcid,
 439                    host->hostdata);
 440
 441         pci_set_drvdata(pcid, host);
 442
 443         esas2r_log(ESAS2R_LOG_INFO, "scsi_add_host() called");
 444
 445         err = scsi_add_host(host, &pcid->dev);
 446
 447         if (err) {
 448                 esas2r_log(ESAS2R_LOG_CRIT, "scsi_add_host returned %d", err);
 449                 esas2r_log_dev(ESAS2R_LOG_CRIT, &(host->shost_gendev),
 450                                "scsi_add_host() FAIL");
 451
 452                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 453                                "scsi_host_put() called");
 454
 455                 scsi_host_put(host);
 456
 457                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 458                                "pci_set_drvdata(%p, NULL) called",
 459                                pcid);
 460
 461                 pci_set_drvdata(pcid, NULL);
 462
 463                 return -ENODEV;
 464         }
 465
 466
 467         esas2r_fw_event_on(a);
 468
 469         esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 470                        "scsi_scan_host() called");
 471
 472         scsi_scan_host(host);
 473
 474         /* Add sysfs binary files */
 475         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fw))
 476                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 477                                "Failed to create sysfs binary file: fw");
 478         else
 479                 a->sysfs_fw_created = 1;
 480
 481         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fs))
 482                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 483                                "Failed to create sysfs binary file: fs");
 484         else
 485                 a->sysfs_fs_created = 1;
 486
 487         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_vda))
 488                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 489                                "Failed to create sysfs binary file: vda");
 490         else
 491                 a->sysfs_vda_created = 1;
 492
 493         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_hw))
 494                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 495                                "Failed to create sysfs binary file: hw");
 496         else
 497                 a->sysfs_hw_created = 1;
 498
 499         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_live_nvram))
 500                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 501                                "Failed to create sysfs binary file: live_nvram");
 502         else
 503                 a->sysfs_live_nvram_created = 1;
 504
 505         if (sysfs_create_bin_file(&host->shost_dev.kobj,
 506                                   &bin_attr_default_nvram))
 507                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 508                                "Failed to create sysfs binary file: default_nvram");
 509         else
 510                 a->sysfs_default_nvram_created = 1;
 511
 512         found_adapters++;
 513
 514         return 0;
 515 }
 516
 517 static void esas2r_remove(struct pci_dev *pdev)
 518 {
 519         struct Scsi_Host *host = pci_get_drvdata(pdev);
 520         struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
 521
 522         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 523                        "esas2r_remove(%p) called; "
 524                        "host:%p", pdev,
 525                        host);
 526
 527         esas2r_kill_adapter(a->index);
 528         found_adapters--;
 529 }
 530
 531 static int __init esas2r_init(void)
 532 {
 533         int i;
 534
 535         esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
 536
 537         /* verify valid parameters */
 538
 539         if (can_queue < 1) {
 540                 esas2r_log(ESAS2R_LOG_WARN,
 541                            "warning: can_queue must be at least 1, value "
 542                            "forced.");
 543                 can_queue = 1;
 544         } else if (can_queue > 2048) {
 545                 esas2r_log(ESAS2R_LOG_WARN,
 546                            "warning: can_queue must be no larger than 2048, "
 547                            "value forced.");
 548                 can_queue = 2048;
 549         }
 550
 551         if (cmd_per_lun < 1) {
 552                 esas2r_log(ESAS2R_LOG_WARN,
 553                            "warning: cmd_per_lun must be at least 1, value "
 554                            "forced.");
 555                 cmd_per_lun = 1;
 556         } else if (cmd_per_lun > 2048) {
 557                 esas2r_log(ESAS2R_LOG_WARN,
 558                            "warning: cmd_per_lun must be no larger than "
 559                            "2048, value forced.");
 560                 cmd_per_lun = 2048;
 561         }
 562
 563         if (sg_tablesize < 32) {
 564                 esas2r_log(ESAS2R_LOG_WARN,
 565                            "warning: sg_tablesize must be at least 32, "
 566                            "value forced.");
 567                 sg_tablesize = 32;
 568         }
 569
 570         if (esas2r_max_sectors < 1) {
 571                 esas2r_log(ESAS2R_LOG_WARN,
 572                            "warning: esas2r_max_sectors must be at least "
 573                            "1, value forced.");
 574                 esas2r_max_sectors = 1;
 575         } else if (esas2r_max_sectors > 0xffff) {
 576                 esas2r_log(ESAS2R_LOG_WARN,
 577                            "warning: esas2r_max_sectors must be no larger "
 578                            "than 0xffff, value forced.");
 579                 esas2r_max_sectors = 0xffff;
 580         }
 581
 582         sgl_page_size &= ~(ESAS2R_SGL_ALIGN - 1);
 583
 584         if (sgl_page_size < SGL_PG_SZ_MIN)
 585                 sgl_page_size = SGL_PG_SZ_MIN;
 586         else if (sgl_page_size > SGL_PG_SZ_MAX)
 587                 sgl_page_size = SGL_PG_SZ_MAX;
 588
 589         if (num_sg_lists < NUM_SGL_MIN)
 590                 num_sg_lists = NUM_SGL_MIN;
 591         else if (num_sg_lists > NUM_SGL_MAX)
 592                 num_sg_lists = NUM_SGL_MAX;
 593
 594         if (num_requests < NUM_REQ_MIN)
 595                 num_requests = NUM_REQ_MIN;
 596         else if (num_requests > NUM_REQ_MAX)
 597                 num_requests = NUM_REQ_MAX;
 598
 599         if (num_ae_requests < NUM_AE_MIN)
 600                 num_ae_requests = NUM_AE_MIN;
 601         else if (num_ae_requests > NUM_AE_MAX)
 602                 num_ae_requests = NUM_AE_MAX;
 603
 604         /* set up other globals */
 605
 606         for (i = 0; i < MAX_ADAPTERS; i++)
 607                 esas2r_adapters[i] = NULL;
 608
 609         return pci_register_driver(&esas2r_pci_driver);
 610 }
 611
 612 /* Handle ioctl calls to "/proc/scsi/esas2r/ATTOnode" */
 613 static const struct file_operations esas2r_proc_fops = {
 614         .compat_ioctl   = compat_ptr_ioctl,
 615         .unlocked_ioctl = esas2r_proc_ioctl,
 616 };
 617
 618 static const struct proc_ops esas2r_proc_ops = {
 619         .proc_ioctl             = esas2r_proc_ioctl,
 620 #ifdef CONFIG_COMPAT
 621         .proc_compat_ioctl      = compat_ptr_ioctl,
 622 #endif
 623 };
 624
 625 static struct Scsi_Host *esas2r_proc_host;
 626 static int esas2r_proc_major;
 627
 628 long esas2r_proc_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
 629 {
 630         return esas2r_ioctl_handler(esas2r_proc_host->hostdata,
 631                                     cmd, (void __user *)arg);
 632 }
 633
 634 static void __exit esas2r_exit(void)
 635 {
 636         esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
 637
 638         if (esas2r_proc_major > 0) {
 639                 esas2r_log(ESAS2R_LOG_INFO, "unregister proc");
 640
 641                 remove_proc_entry(ATTONODE_NAME,
 642                                   esas2r_proc_host->hostt->proc_dir);
 643                 unregister_chrdev(esas2r_proc_major, ESAS2R_DRVR_NAME);
 644
 645                 esas2r_proc_major = 0;
 646         }
 647
 648         esas2r_log(ESAS2R_LOG_INFO, "pci_unregister_driver() called");
 649
 650         pci_unregister_driver(&esas2r_pci_driver);
 651 }
 652
 653 int esas2r_show_info(struct seq_file *m, struct Scsi_Host *sh)
 654 {
 655         struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
 656
 657         struct esas2r_target *t;
 658         int dev_count = 0;
 659
 660         esas2r_log(ESAS2R_LOG_DEBG, "esas2r_show_info (%p,%d)", m, sh->host_no);
 661
 662         seq_printf(m, ESAS2R_LONGNAME "\n"
 663                    "Driver version: "ESAS2R_VERSION_STR "\n"
 664                    "Flash version: %s\n"
 665                    "Firmware version: %s\n"
 666                    "Copyright "ESAS2R_COPYRIGHT_YEARS "\n"
 667                    "http://www.attotech.com\n"
 668                    "\n",
 669                    a->flash_rev,
 670                    a->fw_rev[0] ? a->fw_rev : "(none)");
 671
 672
 673         seq_printf(m, "Adapter information:\n"
 674                    "--------------------\n"
 675                    "Model: %s\n"
 676                    "SAS address: %02X%02X%02X%02X:%02X%02X%02X%02X\n",
 677                    esas2r_get_model_name(a),
 678                    a->nvram->sas_addr[0],
 679                    a->nvram->sas_addr[1],
 680                    a->nvram->sas_addr[2],
 681                    a->nvram->sas_addr[3],
 682                    a->nvram->sas_addr[4],
 683                    a->nvram->sas_addr[5],
 684                    a->nvram->sas_addr[6],
 685                    a->nvram->sas_addr[7]);
 686
 687         seq_puts(m, "\n"
 688                    "Discovered devices:\n"
 689                    "\n"
 690                    "   #  Target ID\n"
 691                    "---------------\n");
 692
 693         for (t = a->targetdb; t < a->targetdb_end; t++)
 694                 if (t->buffered_target_state == TS_PRESENT) {
 695                         seq_printf(m, " %3d   %3d\n",
 696                                    ++dev_count,
 697                                    (u16)(uintptr_t)(t - a->targetdb));
 698                 }
 699
 700         if (dev_count == 0)
 701                 seq_puts(m, "none\n");
 702
 703         seq_putc(m, '\n');
 704         return 0;
 705
 706 }
 707
 708 const char *esas2r_info(struct Scsi_Host *sh)
 709 {
 710         struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
 711         static char esas2r_info_str[512];
 712
 713         esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
 714                        "esas2r_info() called");
 715
 716         /*
 717          * if we haven't done so already, register as a char driver
 718          * and stick a node under "/proc/scsi/esas2r/ATTOnode"
 719          */
 720
 721         if (esas2r_proc_major <= 0) {
 722                 esas2r_proc_host = sh;
 723
 724                 esas2r_proc_major = register_chrdev(0, ESAS2R_DRVR_NAME,
 725                                                     &esas2r_proc_fops);
 726
 727                 esas2r_log_dev(ESAS2R_LOG_DEBG, &(sh->shost_gendev),
 728                                "register_chrdev (major %d)",
 729                                esas2r_proc_major);
 730
 731                 if (esas2r_proc_major > 0) {
 732                         struct proc_dir_entry *pde;
 733
 734                         pde = proc_create(ATTONODE_NAME, 0,
 735                                           sh->hostt->proc_dir,
 736                                           &esas2r_proc_ops);
 737
 738                         if (!pde) {
 739                                 esas2r_log_dev(ESAS2R_LOG_WARN,
 740                                                &(sh->shost_gendev),
 741                                                "failed to create_proc_entry");
 742                                 esas2r_proc_major = -1;
 743                         }
 744                 }
 745         }
 746
 747         sprintf(esas2r_info_str,
 748                 ESAS2R_LONGNAME " (bus 0x%02X, device 0x%02X, IRQ 0x%02X)"
 749                 " driver version: "ESAS2R_VERSION_STR "  firmware version: "
 750                 "%s\n",
 751                 a->pcid->bus->number, a->pcid->devfn, a->pcid->irq,
 752                 a->fw_rev[0] ? a->fw_rev : "(none)");
 753
 754         return esas2r_info_str;
 755 }
 756
 757 /* Callback for building a request scatter/gather list */
 758 static u32 get_physaddr_from_sgc(struct esas2r_sg_context *sgc, u64 *addr)
 759 {
 760         u32 len;
 761
 762         if (likely(sgc->cur_offset == sgc->exp_offset)) {
 763                 /*
 764                  * the normal case: caller used all bytes from previous call, so
 765                  * expected offset is the same as the current offset.
 766                  */
 767
 768                 if (sgc->sgel_count < sgc->num_sgel) {
 769                         /* retrieve next segment, except for first time */
 770                         if (sgc->exp_offset > (u8 *)0) {
 771                                 /* advance current segment */
 772                                 sgc->cur_sgel = sg_next(sgc->cur_sgel);
 773                                 ++(sgc->sgel_count);
 774                         }
 775
 776
 777                         len = sg_dma_len(sgc->cur_sgel);
 778                         (*addr) = sg_dma_address(sgc->cur_sgel);
 779
 780                         /* save the total # bytes returned to caller so far */
 781                         sgc->exp_offset += len;
 782
 783                 } else {
 784                         len = 0;
 785                 }
 786         } else if (sgc->cur_offset < sgc->exp_offset) {
 787                 /*
 788                  * caller did not use all bytes from previous call. need to
 789                  * compute the address based on current segment.
 790                  */
 791
 792                 len = sg_dma_len(sgc->cur_sgel);
 793                 (*addr) = sg_dma_address(sgc->cur_sgel);
 794
 795                 sgc->exp_offset -= len;
 796
 797                 /* calculate PA based on prev segment address and offsets */
 798                 *addr = *addr +
 799                         (sgc->cur_offset - sgc->exp_offset);
 800
 801                 sgc->exp_offset += len;
 802
 803                 /* re-calculate length based on offset */
 804                 len = lower_32_bits(
 805                         sgc->exp_offset - sgc->cur_offset);
 806         } else {   /* if ( sgc->cur_offset > sgc->exp_offset ) */
 807                    /*
 808                     * we don't expect the caller to skip ahead.
 809                     * cur_offset will never exceed the len we return
 810                     */
 811                 len = 0;
 812         }
 813
 814         return len;
 815 }
 816
 817 int esas2r_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 818 {
 819         struct esas2r_adapter *a =
 820                 (struct esas2r_adapter *)cmd->device->host->hostdata;
 821         struct esas2r_request *rq;
 822         struct esas2r_sg_context sgc;
 823         unsigned bufflen;
 824
 825         /* Assume success, if it fails we will fix the result later. */
 826         cmd->result = DID_OK << 16;
 827
 828         if (unlikely(test_bit(AF_DEGRADED_MODE, &a->flags))) {
 829                 cmd->result = DID_NO_CONNECT << 16;
 830                 cmd->scsi_done(cmd);
 831                 return 0;
 832         }
 833
 834         rq = esas2r_alloc_request(a);
 835         if (unlikely(rq == NULL)) {
 836                 esas2r_debug("esas2r_alloc_request failed");
 837                 return SCSI_MLQUEUE_HOST_BUSY;
 838         }
 839
 840         rq->cmd = cmd;
 841         bufflen = scsi_bufflen(cmd);
 842
 843         if (likely(bufflen != 0)) {
 844                 if (cmd->sc_data_direction == DMA_TO_DEVICE)
 845                         rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_WRD);
 846                 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
 847                         rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_RDD);
 848         }
 849
 850         memcpy(rq->vrq->scsi.cdb, cmd->cmnd, cmd->cmd_len);
 851         rq->vrq->scsi.length = cpu_to_le32(bufflen);
 852         rq->target_id = cmd->device->id;
 853         rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
 854         rq->sense_buf = cmd->sense_buffer;
 855         rq->sense_len = SCSI_SENSE_BUFFERSIZE;
 856
 857         esas2r_sgc_init(&sgc, a, rq, NULL);
 858
 859         sgc.length = bufflen;
 860         sgc.cur_offset = NULL;
 861
 862         sgc.cur_sgel = scsi_sglist(cmd);
 863         sgc.exp_offset = NULL;
 864         sgc.num_sgel = scsi_dma_map(cmd);
 865         sgc.sgel_count = 0;
 866
 867         if (unlikely(sgc.num_sgel < 0)) {
 868                 esas2r_free_request(a, rq);
 869                 return SCSI_MLQUEUE_HOST_BUSY;
 870         }
 871
 872         sgc.get_phys_addr = (PGETPHYSADDR)get_physaddr_from_sgc;
 873
 874         if (unlikely(!esas2r_build_sg_list(a, rq, &sgc))) {
 875                 scsi_dma_unmap(cmd);
 876                 esas2r_free_request(a, rq);
 877                 return SCSI_MLQUEUE_HOST_BUSY;
 878         }
 879
 880         esas2r_debug("start request %p to %d:%d\n", rq, (int)cmd->device->id,
 881                      (int)cmd->device->lun);
 882
 883         esas2r_start_request(a, rq);
 884
 885         return 0;
 886 }
 887
 888 static void complete_task_management_request(struct esas2r_adapter *a,
 889                                              struct esas2r_request *rq)
 890 {
 891         (*rq->task_management_status_ptr) = rq->req_stat;
 892         esas2r_free_request(a, rq);
 893 }
 894
 895 /*
 896  * Searches the specified queue for the specified queue for the command
 897  * to abort.
 898  *
 899  * Return 0 on failure, 1 if command was not found, 2 if command was found
 900  */
 901 static int esas2r_check_active_queue(struct esas2r_adapter *a,
 902                                      struct esas2r_request **abort_request,
 903                                      struct scsi_cmnd *cmd,
 904                                      struct list_head *queue)
 905 {
 906         bool found = false;
 907         struct esas2r_request *ar = *abort_request;
 908         struct esas2r_request *rq;
 909         struct list_head *element, *next;
 910
 911         list_for_each_safe(element, next, queue) {
 912
 913                 rq = list_entry(element, struct esas2r_request, req_list);
 914
 915                 if (rq->cmd == cmd) {
 916
 917                         /* Found the request.  See what to do with it. */
 918                         if (queue == &a->active_list) {
 919                                 /*
 920                                  * We are searching the active queue, which
 921                                  * means that we need to send an abort request
 922                                  * to the firmware.
 923                                  */
 924                                 ar = esas2r_alloc_request(a);
 925                                 if (ar == NULL) {
 926                                         esas2r_log_dev(ESAS2R_LOG_WARN,
 927                                                        &(a->host->shost_gendev),
 928                                                        "unable to allocate an abort request for cmd %p",
 929                                                        cmd);
 930                                         return 0; /* Failure */
 931                                 }
 932
 933                                 /*
 934                                  * Task management request must be formatted
 935                                  * with a lock held.
 936                                  */
 937                                 ar->sense_len = 0;
 938                                 ar->vrq->scsi.length = 0;
 939                                 ar->target_id = rq->target_id;
 940                                 ar->vrq->scsi.flags |= cpu_to_le32(
 941                                         (u8)le32_to_cpu(rq->vrq->scsi.flags));
 942
 943                                 memset(ar->vrq->scsi.cdb, 0,
 944                                        sizeof(ar->vrq->scsi.cdb));
 945
 946                                 ar->vrq->scsi.flags |= cpu_to_le32(
 947                                         FCP_CMND_TRM);
 948                                 ar->vrq->scsi.u.abort_handle =
 949                                         rq->vrq->scsi.handle;
 950                         } else {
 951                                 /*
 952                                  * The request is pending but not active on
 953                                  * the firmware.  Just free it now and we'll
 954                                  * report the successful abort below.
 955                                  */
 956                                 list_del_init(&rq->req_list);
 957                                 esas2r_free_request(a, rq);
 958                         }
 959
 960                         found = true;
 961                         break;
 962                 }
 963
 964         }
 965
 966         if (!found)
 967                 return 1;       /* Not found */
 968
 969         return 2;               /* found */
 970
 971
 972 }
 973
 974 int esas2r_eh_abort(struct scsi_cmnd *cmd)
 975 {
 976         struct esas2r_adapter *a =
 977                 (struct esas2r_adapter *)cmd->device->host->hostdata;
 978         struct esas2r_request *abort_request = NULL;
 979         unsigned long flags;
 980         struct list_head *queue;
 981         int result;
 982
 983         esas2r_log(ESAS2R_LOG_INFO, "eh_abort (%p)", cmd);
 984
 985         if (test_bit(AF_DEGRADED_MODE, &a->flags)) {
 986                 cmd->result = DID_ABORT << 16;
 987
 988                 scsi_set_resid(cmd, 0);
 989
 990                 cmd->scsi_done(cmd);
 991
 992                 return SUCCESS;
 993         }
 994
 995         spin_lock_irqsave(&a->queue_lock, flags);
 996
 997         /*
 998          * Run through the defer and active queues looking for the request
 999          * to abort.
1000          */
1001
1002         queue = &a->defer_list;
1003
1004 check_active_queue:
1005
1006         result = esas2r_check_active_queue(a, &abort_request, cmd, queue);
1007
1008         if (!result) {
1009                 spin_unlock_irqrestore(&a->queue_lock, flags);
1010                 return FAILED;
1011         } else if (result == 2 && (queue == &a->defer_list)) {
1012                 queue = &a->active_list;
1013                 goto check_active_queue;
1014         }
1015
1016         spin_unlock_irqrestore(&a->queue_lock, flags);
1017
1018         if (abort_request) {
1019                 u8 task_management_status = RS_PENDING;
1020
1021                 /*
1022                  * the request is already active, so we need to tell
1023                  * the firmware to abort it and wait for the response.
1024                  */
1025
1026                 abort_request->comp_cb = complete_task_management_request;
1027                 abort_request->task_management_status_ptr =
1028                         &task_management_status;
1029
1030                 esas2r_start_request(a, abort_request);
1031
1032                 if (atomic_read(&a->disable_cnt) == 0)
1033                         esas2r_do_deferred_processes(a);
1034
1035                 while (task_management_status == RS_PENDING)
1036                         msleep(10);
1037
1038                 /*
1039                  * Once we get here, the original request will have been
1040                  * completed by the firmware and the abort request will have
1041                  * been cleaned up.  we're done!
1042                  */
1043
1044                 return SUCCESS;
1045         }
1046
1047         /*
1048          * If we get here, either we found the inactive request and
1049          * freed it, or we didn't find it at all.  Either way, success!
1050          */
1051
1052         cmd->result = DID_ABORT << 16;
1053
1054         scsi_set_resid(cmd, 0);
1055
1056         cmd->scsi_done(cmd);
1057
1058         return SUCCESS;
1059 }
1060
1061 static int esas2r_host_bus_reset(struct scsi_cmnd *cmd, bool host_reset)
1062 {
1063         struct esas2r_adapter *a =
1064                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1065
1066         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1067                 return FAILED;
1068
1069         if (host_reset)
1070                 esas2r_reset_adapter(a);
1071         else
1072                 esas2r_reset_bus(a);
1073
1074         /* above call sets the AF_OS_RESET flag.  wait for it to clear. */
1075
1076         while (test_bit(AF_OS_RESET, &a->flags)) {
1077                 msleep(10);
1078
1079                 if (test_bit(AF_DEGRADED_MODE, &a->flags))
1080                         return FAILED;
1081         }
1082
1083         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1084                 return FAILED;
1085
1086         return SUCCESS;
1087 }
1088
1089 int esas2r_host_reset(struct scsi_cmnd *cmd)
1090 {
1091         esas2r_log(ESAS2R_LOG_INFO, "host_reset (%p)", cmd);
1092
1093         return esas2r_host_bus_reset(cmd, true);
1094 }
1095
1096 int esas2r_bus_reset(struct scsi_cmnd *cmd)
1097 {
1098         esas2r_log(ESAS2R_LOG_INFO, "bus_reset (%p)", cmd);
1099
1100         return esas2r_host_bus_reset(cmd, false);
1101 }
1102
1103 static int esas2r_dev_targ_reset(struct scsi_cmnd *cmd, bool target_reset)
1104 {
1105         struct esas2r_adapter *a =
1106                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1107         struct esas2r_request *rq;
1108         u8 task_management_status = RS_PENDING;
1109         bool completed;
1110
1111         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1112                 return FAILED;
1113
1114 retry:
1115         rq = esas2r_alloc_request(a);
1116         if (rq == NULL) {
1117                 if (target_reset) {
1118                         esas2r_log(ESAS2R_LOG_CRIT,
1119                                    "unable to allocate a request for a "
1120                                    "target reset (%d)!",
1121                                    cmd->device->id);
1122                 } else {
1123                         esas2r_log(ESAS2R_LOG_CRIT,
1124                                    "unable to allocate a request for a "
1125                                    "device reset (%d:%llu)!",
1126                                    cmd->device->id,
1127                                    cmd->device->lun);
1128                 }
1129
1130
1131                 return FAILED;
1132         }
1133
1134         rq->target_id = cmd->device->id;
1135         rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
1136         rq->req_stat = RS_PENDING;
1137
1138         rq->comp_cb = complete_task_management_request;
1139         rq->task_management_status_ptr = &task_management_status;
1140
1141         if (target_reset) {
1142                 esas2r_debug("issuing target reset (%p) to id %d", rq,
1143                              cmd->device->id);
1144                 completed = esas2r_send_task_mgmt(a, rq, 0x20);
1145         } else {
1146                 esas2r_debug("issuing device reset (%p) to id %d lun %d", rq,
1147                              cmd->device->id, cmd->device->lun);
1148                 completed = esas2r_send_task_mgmt(a, rq, 0x10);
1149         }
1150
1151         if (completed) {
1152                 /* Task management cmd completed right away, need to free it. */
1153
1154                 esas2r_free_request(a, rq);
1155         } else {
1156                 /*
1157                  * Wait for firmware to complete the request.  Completion
1158                  * callback will free it.
1159                  */
1160                 while (task_management_status == RS_PENDING)
1161                         msleep(10);
1162         }
1163
1164         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1165                 return FAILED;
1166
1167         if (task_management_status == RS_BUSY) {
1168                 /*
1169                  * Busy, probably because we are flashing.  Wait a bit and
1170                  * try again.
1171                  */
1172                 msleep(100);
1173                 goto retry;
1174         }
1175
1176         return SUCCESS;
1177 }
1178
1179 int esas2r_device_reset(struct scsi_cmnd *cmd)
1180 {
1181         esas2r_log(ESAS2R_LOG_INFO, "device_reset (%p)", cmd);
1182
1183         return esas2r_dev_targ_reset(cmd, false);
1184
1185 }
1186
1187 int esas2r_target_reset(struct scsi_cmnd *cmd)
1188 {
1189         esas2r_log(ESAS2R_LOG_INFO, "target_reset (%p)", cmd);
1190
1191         return esas2r_dev_targ_reset(cmd, true);
1192 }
1193
1194 void esas2r_log_request_failure(struct esas2r_adapter *a,
1195                                 struct esas2r_request *rq)
1196 {
1197         u8 reqstatus = rq->req_stat;
1198
1199         if (reqstatus == RS_SUCCESS)
1200                 return;
1201
1202         if (rq->vrq->scsi.function == VDA_FUNC_SCSI) {
1203                 if (reqstatus == RS_SCSI_ERROR) {
1204                         if (rq->func_rsp.scsi_rsp.sense_len >= 13) {
1205                                 esas2r_log(ESAS2R_LOG_WARN,
1206                                            "request failure - SCSI error %x ASC:%x ASCQ:%x CDB:%x",
1207                                            rq->sense_buf[2], rq->sense_buf[12],
1208                                            rq->sense_buf[13],
1209                                            rq->vrq->scsi.cdb[0]);
1210                         } else {
1211                                 esas2r_log(ESAS2R_LOG_WARN,
1212                                            "request failure - SCSI error CDB:%x\n",
1213                                            rq->vrq->scsi.cdb[0]);
1214                         }
1215                 } else if ((rq->vrq->scsi.cdb[0] != INQUIRY
1216                             && rq->vrq->scsi.cdb[0] != REPORT_LUNS)
1217                            || (reqstatus != RS_SEL
1218                                && reqstatus != RS_SEL2)) {
1219                         if ((reqstatus == RS_UNDERRUN) &&
1220                             (rq->vrq->scsi.cdb[0] == INQUIRY)) {
1221                                 /* Don't log inquiry underruns */
1222                         } else {
1223                                 esas2r_log(ESAS2R_LOG_WARN,
1224                                            "request failure - cdb:%x reqstatus:%d target:%d",
1225                                            rq->vrq->scsi.cdb[0], reqstatus,
1226                                            rq->target_id);
1227                         }
1228                 }
1229         }
1230 }
1231
1232 void esas2r_wait_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1233 {
1234         u32 starttime;
1235         u32 timeout;
1236
1237         starttime = jiffies_to_msecs(jiffies);
1238         timeout = rq->timeout ? rq->timeout : 5000;
1239
1240         while (true) {
1241                 esas2r_polled_interrupt(a);
1242
1243                 if (rq->req_stat != RS_STARTED)
1244                         break;
1245
1246                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1247
1248                 if ((jiffies_to_msecs(jiffies) - starttime) > timeout) {
1249                         esas2r_hdebug("request TMO");
1250                         esas2r_bugon();
1251
1252                         rq->req_stat = RS_TIMEOUT;
1253
1254                         esas2r_local_reset_adapter(a);
1255                         return;
1256                 }
1257         }
1258 }
1259
1260 u32 esas2r_map_data_window(struct esas2r_adapter *a, u32 addr_lo)
1261 {
1262         u32 offset = addr_lo & (MW_DATA_WINDOW_SIZE - 1);
1263         u32 base = addr_lo & -(signed int)MW_DATA_WINDOW_SIZE;
1264
1265         if (a->window_base != base) {
1266                 esas2r_write_register_dword(a, MVR_PCI_WIN1_REMAP,
1267                                             base | MVRPW1R_ENABLE);
1268                 esas2r_flush_register_dword(a, MVR_PCI_WIN1_REMAP);
1269                 a->window_base = base;
1270         }
1271
1272         return offset;
1273 }
1274
1275 /* Read a block of data from chip memory */
1276 bool esas2r_read_mem_block(struct esas2r_adapter *a,
1277                            void *to,
1278                            u32 from,
1279                            u32 size)
1280 {
1281         u8 *end = (u8 *)to;
1282
1283         while (size) {
1284                 u32 len;
1285                 u32 offset;
1286                 u32 iatvr;
1287
1288                 iatvr = (from & -(signed int)MW_DATA_WINDOW_SIZE);
1289
1290                 esas2r_map_data_window(a, iatvr);
1291
1292                 offset = from & (MW_DATA_WINDOW_SIZE - 1);
1293                 len = size;
1294
1295                 if (len > MW_DATA_WINDOW_SIZE - offset)
1296                         len = MW_DATA_WINDOW_SIZE - offset;
1297
1298                 from += len;
1299                 size -= len;
1300
1301                 while (len--) {
1302                         *end++ = esas2r_read_data_byte(a, offset);
1303                         offset++;
1304                 }
1305         }
1306
1307         return true;
1308 }
1309
1310 void esas2r_nuxi_mgt_data(u8 function, void *data)
1311 {
1312         struct atto_vda_grp_info *g;
1313         struct atto_vda_devinfo *d;
1314         struct atto_vdapart_info *p;
1315         struct atto_vda_dh_info *h;
1316         struct atto_vda_metrics_info *m;
1317         struct atto_vda_schedule_info *s;
1318         struct atto_vda_buzzer_info *b;
1319         u8 i;
1320
1321         switch (function) {
1322         case VDAMGT_BUZZER_INFO:
1323         case VDAMGT_BUZZER_SET:
1324
1325                 b = (struct atto_vda_buzzer_info *)data;
1326
1327                 b->duration = le32_to_cpu(b->duration);
1328                 break;
1329
1330         case VDAMGT_SCHEDULE_INFO:
1331         case VDAMGT_SCHEDULE_EVENT:
1332
1333                 s = (struct atto_vda_schedule_info *)data;
1334
1335                 s->id = le32_to_cpu(s->id);
1336
1337                 break;
1338
1339         case VDAMGT_DEV_INFO:
1340         case VDAMGT_DEV_CLEAN:
1341         case VDAMGT_DEV_PT_INFO:
1342         case VDAMGT_DEV_FEATURES:
1343         case VDAMGT_DEV_PT_FEATURES:
1344         case VDAMGT_DEV_OPERATION:
1345
1346                 d = (struct atto_vda_devinfo *)data;
1347
1348                 d->capacity = le64_to_cpu(d->capacity);
1349                 d->block_size = le32_to_cpu(d->block_size);
1350                 d->ses_dev_index = le16_to_cpu(d->ses_dev_index);
1351                 d->target_id = le16_to_cpu(d->target_id);
1352                 d->lun = le16_to_cpu(d->lun);
1353                 d->features = le16_to_cpu(d->features);
1354                 break;
1355
1356         case VDAMGT_GRP_INFO:
1357         case VDAMGT_GRP_CREATE:
1358         case VDAMGT_GRP_DELETE:
1359         case VDAMGT_ADD_STORAGE:
1360         case VDAMGT_MEMBER_ADD:
1361         case VDAMGT_GRP_COMMIT:
1362         case VDAMGT_GRP_REBUILD:
1363         case VDAMGT_GRP_COMMIT_INIT:
1364         case VDAMGT_QUICK_RAID:
1365         case VDAMGT_GRP_FEATURES:
1366         case VDAMGT_GRP_COMMIT_INIT_AUTOMAP:
1367         case VDAMGT_QUICK_RAID_INIT_AUTOMAP:
1368         case VDAMGT_SPARE_LIST:
1369         case VDAMGT_SPARE_ADD:
1370         case VDAMGT_SPARE_REMOVE:
1371         case VDAMGT_LOCAL_SPARE_ADD:
1372         case VDAMGT_GRP_OPERATION:
1373
1374                 g = (struct atto_vda_grp_info *)data;
1375
1376                 g->capacity = le64_to_cpu(g->capacity);
1377                 g->block_size = le32_to_cpu(g->block_size);
1378                 g->interleave = le32_to_cpu(g->interleave);
1379                 g->features = le16_to_cpu(g->features);
1380
1381                 for (i = 0; i < 32; i++)
1382                         g->members[i] = le16_to_cpu(g->members[i]);
1383
1384                 break;
1385
1386         case VDAMGT_PART_INFO:
1387         case VDAMGT_PART_MAP:
1388         case VDAMGT_PART_UNMAP:
1389         case VDAMGT_PART_AUTOMAP:
1390         case VDAMGT_PART_SPLIT:
1391         case VDAMGT_PART_MERGE:
1392
1393                 p = (struct atto_vdapart_info *)data;
1394
1395                 p->part_size = le64_to_cpu(p->part_size);
1396                 p->start_lba = le32_to_cpu(p->start_lba);
1397                 p->block_size = le32_to_cpu(p->block_size);
1398                 p->target_id = le16_to_cpu(p->target_id);
1399                 break;
1400
1401         case VDAMGT_DEV_HEALTH_REQ:
1402
1403                 h = (struct atto_vda_dh_info *)data;
1404
1405                 h->med_defect_cnt = le32_to_cpu(h->med_defect_cnt);
1406                 h->info_exc_cnt = le32_to_cpu(h->info_exc_cnt);
1407                 break;
1408
1409         case VDAMGT_DEV_METRICS:
1410
1411                 m = (struct atto_vda_metrics_info *)data;
1412
1413                 for (i = 0; i < 32; i++)
1414                         m->dev_indexes[i] = le16_to_cpu(m->dev_indexes[i]);
1415
1416                 break;
1417
1418         default:
1419                 break;
1420         }
1421 }
1422
1423 void esas2r_nuxi_cfg_data(u8 function, void *data)
1424 {
1425         struct atto_vda_cfg_init *ci;
1426
1427         switch (function) {
1428         case VDA_CFG_INIT:
1429         case VDA_CFG_GET_INIT:
1430         case VDA_CFG_GET_INIT2:
1431
1432                 ci = (struct atto_vda_cfg_init *)data;
1433
1434                 ci->date_time.year = le16_to_cpu(ci->date_time.year);
1435                 ci->sgl_page_size = le32_to_cpu(ci->sgl_page_size);
1436                 ci->vda_version = le32_to_cpu(ci->vda_version);
1437                 ci->epoch_time = le32_to_cpu(ci->epoch_time);
1438                 ci->ioctl_tunnel = le32_to_cpu(ci->ioctl_tunnel);
1439                 ci->num_targets_backend = le32_to_cpu(ci->num_targets_backend);
1440                 break;
1441
1442         default:
1443                 break;
1444         }
1445 }
1446
1447 void esas2r_nuxi_ae_data(union atto_vda_ae *ae)
1448 {
1449         struct atto_vda_ae_raid *r = &ae->raid;
1450         struct atto_vda_ae_lu *l = &ae->lu;
1451
1452         switch (ae->hdr.bytype) {
1453         case VDAAE_HDR_TYPE_RAID:
1454
1455                 r->dwflags = le32_to_cpu(r->dwflags);
1456                 break;
1457
1458         case VDAAE_HDR_TYPE_LU:
1459
1460                 l->dwevent = le32_to_cpu(l->dwevent);
1461                 l->wphys_target_id = le16_to_cpu(l->wphys_target_id);
1462                 l->id.tgtlun.wtarget_id = le16_to_cpu(l->id.tgtlun.wtarget_id);
1463
1464                 if (l->hdr.bylength >= offsetof(struct atto_vda_ae_lu, id)
1465                     + sizeof(struct atto_vda_ae_lu_tgt_lun_raid)) {
1466                         l->id.tgtlun_raid.dwinterleave
1467                                 = le32_to_cpu(l->id.tgtlun_raid.dwinterleave);
1468                         l->id.tgtlun_raid.dwblock_size
1469                                 = le32_to_cpu(l->id.tgtlun_raid.dwblock_size);
1470                 }
1471
1472                 break;
1473
1474         case VDAAE_HDR_TYPE_DISK:
1475         default:
1476                 break;
1477         }
1478 }
1479
1480 void esas2r_free_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1481 {
1482         unsigned long flags;
1483
1484         esas2r_rq_destroy_request(rq, a);
1485         spin_lock_irqsave(&a->request_lock, flags);
1486         list_add(&rq->comp_list, &a->avail_request);
1487         spin_unlock_irqrestore(&a->request_lock, flags);
1488 }
1489
1490 struct esas2r_request *esas2r_alloc_request(struct esas2r_adapter *a)
1491 {
1492         struct esas2r_request *rq;
1493         unsigned long flags;
1494
1495         spin_lock_irqsave(&a->request_lock, flags);
1496
1497         if (unlikely(list_empty(&a->avail_request))) {
1498                 spin_unlock_irqrestore(&a->request_lock, flags);
1499                 return NULL;
1500         }
1501
1502         rq = list_first_entry(&a->avail_request, struct esas2r_request,
1503                               comp_list);
1504         list_del(&rq->comp_list);
1505         spin_unlock_irqrestore(&a->request_lock, flags);
1506         esas2r_rq_init_request(rq, a);
1507
1508         return rq;
1509
1510 }
1511
1512 void esas2r_complete_request_cb(struct esas2r_adapter *a,
1513                                 struct esas2r_request *rq)
1514 {
1515         esas2r_debug("completing request %p\n", rq);
1516
1517         scsi_dma_unmap(rq->cmd);
1518
1519         if (unlikely(rq->req_stat != RS_SUCCESS)) {
1520                 esas2r_debug("[%x STATUS %x:%x (%x)]", rq->target_id,
1521                              rq->req_stat,
1522                              rq->func_rsp.scsi_rsp.scsi_stat,
1523                              rq->cmd);
1524
1525                 rq->cmd->result =
1526                         ((esas2r_req_status_to_error(rq->req_stat) << 16)
1527                          | (rq->func_rsp.scsi_rsp.scsi_stat & STATUS_MASK));
1528
1529                 if (rq->req_stat == RS_UNDERRUN)
1530                         scsi_set_resid(rq->cmd,
1531                                        le32_to_cpu(rq->func_rsp.scsi_rsp.
1532                                                    residual_length));
1533                 else
1534                         scsi_set_resid(rq->cmd, 0);
1535         }
1536
1537         rq->cmd->scsi_done(rq->cmd);
1538
1539         esas2r_free_request(a, rq);
1540 }
1541
1542 /* Run tasklet to handle stuff outside of interrupt context. */
1543 void esas2r_adapter_tasklet(unsigned long context)
1544 {
1545         struct esas2r_adapter *a = (struct esas2r_adapter *)context;
1546
1547         if (unlikely(test_bit(AF2_TIMER_TICK, &a->flags2))) {
1548                 clear_bit(AF2_TIMER_TICK, &a->flags2);
1549                 esas2r_timer_tick(a);
1550         }
1551
1552         if (likely(test_bit(AF2_INT_PENDING, &a->flags2))) {
1553                 clear_bit(AF2_INT_PENDING, &a->flags2);
1554                 esas2r_adapter_interrupt(a);
1555         }
1556
1557         if (esas2r_is_tasklet_pending(a))
1558                 esas2r_do_tasklet_tasks(a);
1559
1560         if (esas2r_is_tasklet_pending(a)
1561             || (test_bit(AF2_INT_PENDING, &a->flags2))
1562             || (test_bit(AF2_TIMER_TICK, &a->flags2))) {
1563                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1564                 esas2r_schedule_tasklet(a);
1565         } else {
1566                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1567         }
1568 }
1569
1570 static void esas2r_timer_callback(struct timer_list *t);
1571
1572 void esas2r_kickoff_timer(struct esas2r_adapter *a)
1573 {
1574         timer_setup(&a->timer, esas2r_timer_callback, 0);
1575
1576         a->timer.expires = jiffies +
1577                            msecs_to_jiffies(100);
1578
1579         add_timer(&a->timer);
1580 }
1581
1582 static void esas2r_timer_callback(struct timer_list *t)
1583 {
1584         struct esas2r_adapter *a = from_timer(a, t, timer);
1585
1586         set_bit(AF2_TIMER_TICK, &a->flags2);
1587
1588         esas2r_schedule_tasklet(a);
1589
1590         esas2r_kickoff_timer(a);
1591 }
1592
1593 /*
1594  * Firmware events need to be handled outside of interrupt context
1595  * so we schedule a delayed_work to handle them.
1596  */
1597
1598 static void
1599 esas2r_free_fw_event(struct esas2r_fw_event_work *fw_event)
1600 {
1601         unsigned long flags;
1602         struct esas2r_adapter *a = fw_event->a;
1603
1604         spin_lock_irqsave(&a->fw_event_lock, flags);
1605         list_del(&fw_event->list);
1606         kfree(fw_event);
1607         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1608 }
1609
1610 void
1611 esas2r_fw_event_off(struct esas2r_adapter *a)
1612 {
1613         unsigned long flags;
1614
1615         spin_lock_irqsave(&a->fw_event_lock, flags);
1616         a->fw_events_off = 1;
1617         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1618 }
1619
1620 void
1621 esas2r_fw_event_on(struct esas2r_adapter *a)
1622 {
1623         unsigned long flags;
1624
1625         spin_lock_irqsave(&a->fw_event_lock, flags);
1626         a->fw_events_off = 0;
1627         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1628 }
1629
1630 static void esas2r_add_device(struct esas2r_adapter *a, u16 target_id)
1631 {
1632         int ret;
1633         struct scsi_device *scsi_dev;
1634
1635         scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1636
1637         if (scsi_dev) {
1638                 esas2r_log_dev(
1639                         ESAS2R_LOG_WARN,
1640                         &(scsi_dev->
1641                           sdev_gendev),
1642                         "scsi device already exists at id %d", target_id);
1643
1644                 scsi_device_put(scsi_dev);
1645         } else {
1646                 esas2r_log_dev(
1647                         ESAS2R_LOG_INFO,
1648                         &(a->host->
1649                           shost_gendev),
1650                         "scsi_add_device() called for 0:%d:0",
1651                         target_id);
1652
1653                 ret = scsi_add_device(a->host, 0, target_id, 0);
1654                 if (ret) {
1655                         esas2r_log_dev(
1656                                 ESAS2R_LOG_CRIT,
1657                                 &(a->host->
1658                                   shost_gendev),
1659                                 "scsi_add_device failed with %d for id %d",
1660                                 ret, target_id);
1661                 }
1662         }
1663 }
1664
1665 static void esas2r_remove_device(struct esas2r_adapter *a, u16 target_id)
1666 {
1667         struct scsi_device *scsi_dev;
1668
1669         scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1670
1671         if (scsi_dev) {
1672                 scsi_device_set_state(scsi_dev, SDEV_OFFLINE);
1673
1674                 esas2r_log_dev(
1675                         ESAS2R_LOG_INFO,
1676                         &(scsi_dev->
1677                           sdev_gendev),
1678                         "scsi_remove_device() called for 0:%d:0",
1679                         target_id);
1680
1681                 scsi_remove_device(scsi_dev);
1682
1683                 esas2r_log_dev(
1684                         ESAS2R_LOG_INFO,
1685                         &(scsi_dev->
1686                           sdev_gendev),
1687                         "scsi_device_put() called");
1688
1689                 scsi_device_put(scsi_dev);
1690         } else {
1691                 esas2r_log_dev(
1692                         ESAS2R_LOG_WARN,
1693                         &(a->host->shost_gendev),
1694                         "no target found at id %d",
1695                         target_id);
1696         }
1697 }
1698
1699 /*
1700  * Sends a firmware asynchronous event to anyone who happens to be
1701  * listening on the defined ATTO VDA event ports.
1702  */
1703 static void esas2r_send_ae_event(struct esas2r_fw_event_work *fw_event)
1704 {
1705         struct esas2r_vda_ae *ae = (struct esas2r_vda_ae *)fw_event->data;
1706         char *type;
1707
1708         switch (ae->vda_ae.hdr.bytype) {
1709         case VDAAE_HDR_TYPE_RAID:
1710                 type = "RAID group state change";
1711                 break;
1712
1713         case VDAAE_HDR_TYPE_LU:
1714                 type = "Mapped destination LU change";
1715                 break;
1716
1717         case VDAAE_HDR_TYPE_DISK:
1718                 type = "Physical disk inventory change";
1719                 break;
1720
1721         case VDAAE_HDR_TYPE_RESET:
1722                 type = "Firmware reset";
1723                 break;
1724
1725         case VDAAE_HDR_TYPE_LOG_INFO:
1726                 type = "Event Log message (INFO level)";
1727                 break;
1728
1729         case VDAAE_HDR_TYPE_LOG_WARN:
1730                 type = "Event Log message (WARN level)";
1731                 break;
1732
1733         case VDAAE_HDR_TYPE_LOG_CRIT:
1734                 type = "Event Log message (CRIT level)";
1735                 break;
1736
1737         case VDAAE_HDR_TYPE_LOG_FAIL:
1738                 type = "Event Log message (FAIL level)";
1739                 break;
1740
1741         case VDAAE_HDR_TYPE_NVC:
1742                 type = "NVCache change";
1743                 break;
1744
1745         case VDAAE_HDR_TYPE_TLG_INFO:
1746                 type = "Time stamped log message (INFO level)";
1747                 break;
1748
1749         case VDAAE_HDR_TYPE_TLG_WARN:
1750                 type = "Time stamped log message (WARN level)";
1751                 break;
1752
1753         case VDAAE_HDR_TYPE_TLG_CRIT:
1754                 type = "Time stamped log message (CRIT level)";
1755                 break;
1756
1757         case VDAAE_HDR_TYPE_PWRMGT:
1758                 type = "Power management";
1759                 break;
1760
1761         case VDAAE_HDR_TYPE_MUTE:
1762                 type = "Mute button pressed";
1763                 break;
1764
1765         case VDAAE_HDR_TYPE_DEV:
1766                 type = "Device attribute change";
1767                 break;
1768
1769         default:
1770                 type = "Unknown";
1771                 break;
1772         }
1773
1774         esas2r_log(ESAS2R_LOG_WARN,
1775                    "An async event of type \"%s\" was received from the firmware.  The event contents are:",
1776                    type);
1777         esas2r_log_hexdump(ESAS2R_LOG_WARN, &ae->vda_ae,
1778                            ae->vda_ae.hdr.bylength);
1779
1780 }
1781
1782 static void
1783 esas2r_firmware_event_work(struct work_struct *work)
1784 {
1785         struct esas2r_fw_event_work *fw_event =
1786                 container_of(work, struct esas2r_fw_event_work, work.work);
1787
1788         struct esas2r_adapter *a = fw_event->a;
1789
1790         u16 target_id = *(u16 *)&fw_event->data[0];
1791
1792         if (a->fw_events_off)
1793                 goto done;
1794
1795         switch (fw_event->type) {
1796         case fw_event_null:
1797                 break; /* do nothing */
1798
1799         case fw_event_lun_change:
1800                 esas2r_remove_device(a, target_id);
1801                 esas2r_add_device(a, target_id);
1802                 break;
1803
1804         case fw_event_present:
1805                 esas2r_add_device(a, target_id);
1806                 break;
1807
1808         case fw_event_not_present:
1809                 esas2r_remove_device(a, target_id);
1810                 break;
1811
1812         case fw_event_vda_ae:
1813                 esas2r_send_ae_event(fw_event);
1814                 break;
1815         }
1816
1817 done:
1818         esas2r_free_fw_event(fw_event);
1819 }
1820
1821 void esas2r_queue_fw_event(struct esas2r_adapter *a,
1822                            enum fw_event_type type,
1823                            void *data,
1824                            int data_sz)
1825 {
1826         struct esas2r_fw_event_work *fw_event;
1827         unsigned long flags;
1828
1829         fw_event = kzalloc(sizeof(struct esas2r_fw_event_work), GFP_ATOMIC);
1830         if (!fw_event) {
1831                 esas2r_log(ESAS2R_LOG_WARN,
1832                            "esas2r_queue_fw_event failed to alloc");
1833                 return;
1834         }
1835
1836         if (type == fw_event_vda_ae) {
1837                 struct esas2r_vda_ae *ae =
1838                         (struct esas2r_vda_ae *)fw_event->data;
1839
1840                 ae->signature = ESAS2R_VDA_EVENT_SIG;
1841                 ae->bus_number = a->pcid->bus->number;
1842                 ae->devfn = a->pcid->devfn;
1843                 memcpy(&ae->vda_ae, data, sizeof(ae->vda_ae));
1844         } else {
1845                 memcpy(fw_event->data, data, data_sz);
1846         }
1847
1848         fw_event->type = type;
1849         fw_event->a = a;
1850
1851         spin_lock_irqsave(&a->fw_event_lock, flags);
1852         list_add_tail(&fw_event->list, &a->fw_event_list);
1853         INIT_DELAYED_WORK(&fw_event->work, esas2r_firmware_event_work);
1854         queue_delayed_work_on(
1855                 smp_processor_id(), a->fw_event_q, &fw_event->work,
1856                 msecs_to_jiffies(1));
1857         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1858 }
1859
1860 void esas2r_target_state_changed(struct esas2r_adapter *a, u16 targ_id,
1861                                  u8 state)
1862 {
1863         if (state == TS_LUN_CHANGE)
1864                 esas2r_queue_fw_event(a, fw_event_lun_change, &targ_id,
1865                                       sizeof(targ_id));
1866         else if (state == TS_PRESENT)
1867                 esas2r_queue_fw_event(a, fw_event_present, &targ_id,
1868                                       sizeof(targ_id));
1869         else if (state == TS_NOT_PRESENT)
1870                 esas2r_queue_fw_event(a, fw_event_not_present, &targ_id,
1871                                       sizeof(targ_id));
1872 }
1873
1874 /* Translate status to a Linux SCSI mid-layer error code */
1875 int esas2r_req_status_to_error(u8 req_stat)
1876 {
1877         switch (req_stat) {
1878         case RS_OVERRUN:
1879         case RS_UNDERRUN:
1880         case RS_SUCCESS:
1881         /*
1882          * NOTE: SCSI mid-layer wants a good status for a SCSI error, because
1883          *       it will check the scsi_stat value in the completion anyway.
1884          */
1885         case RS_SCSI_ERROR:
1886                 return DID_OK;
1887
1888         case RS_SEL:
1889         case RS_SEL2:
1890                 return DID_NO_CONNECT;
1891
1892         case RS_RESET:
1893                 return DID_RESET;
1894
1895         case RS_ABORTED:
1896                 return DID_ABORT;
1897
1898         case RS_BUSY:
1899                 return DID_BUS_BUSY;
1900         }
1901
1902         /* everything else is just an error. */
1903
1904         return DID_ERROR;
1905 }
1906
1907 module_init(esas2r_init);
1908 module_exit(esas2r_exit);