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         .unchecked_isa_dma              = 0,
 253         .emulated                       = 0,
 254         .proc_name                      = ESAS2R_DRVR_NAME,
 255         .change_queue_depth             = scsi_change_queue_depth,
 256         .max_sectors                    = 0xFFFF,
 257 };
 258
 259 int sgl_page_size = 512;
 260 module_param(sgl_page_size, int, 0);
 261 MODULE_PARM_DESC(sgl_page_size,
 262                  "Scatter/gather list (SGL) page size in number of S/G "
 263                  "entries.  If your application is doing a lot of very large "
 264                  "transfers, you may want to increase the SGL page size.  "
 265                  "Default 512.");
 266
 267 int num_sg_lists = 1024;
 268 module_param(num_sg_lists, int, 0);
 269 MODULE_PARM_DESC(num_sg_lists,
 270                  "Number of scatter/gather lists.  Default 1024.");
 271
 272 int sg_tablesize = SG_CHUNK_SIZE;
 273 module_param(sg_tablesize, int, 0);
 274 MODULE_PARM_DESC(sg_tablesize,
 275                  "Maximum number of entries in a scatter/gather table.");
 276
 277 int num_requests = 256;
 278 module_param(num_requests, int, 0);
 279 MODULE_PARM_DESC(num_requests,
 280                  "Number of requests.  Default 256.");
 281
 282 int num_ae_requests = 4;
 283 module_param(num_ae_requests, int, 0);
 284 MODULE_PARM_DESC(num_ae_requests,
 285                  "Number of VDA asynchronous event requests.  Default 4.");
 286
 287 int cmd_per_lun = ESAS2R_DEFAULT_CMD_PER_LUN;
 288 module_param(cmd_per_lun, int, 0);
 289 MODULE_PARM_DESC(cmd_per_lun,
 290                  "Maximum number of commands per LUN.  Default "
 291                  DEFINED_NUM_TO_STR(ESAS2R_DEFAULT_CMD_PER_LUN) ".");
 292
 293 int can_queue = 128;
 294 module_param(can_queue, int, 0);
 295 MODULE_PARM_DESC(can_queue,
 296                  "Maximum number of commands per adapter.  Default 128.");
 297
 298 int esas2r_max_sectors = 0xFFFF;
 299 module_param(esas2r_max_sectors, int, 0);
 300 MODULE_PARM_DESC(esas2r_max_sectors,
 301                  "Maximum number of disk sectors in a single data transfer.  "
 302                  "Default 65535 (largest possible setting).");
 303
 304 int interrupt_mode = 1;
 305 module_param(interrupt_mode, int, 0);
 306 MODULE_PARM_DESC(interrupt_mode,
 307                  "Defines the interrupt mode to use.  0 for legacy"
 308                  ", 1 for MSI.  Default is MSI (1).");
 309
 310 static const struct pci_device_id
 311         esas2r_pci_table[] = {
 312         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x0049,
 313           0,
 314           0, 0 },
 315         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004A,
 316           0,
 317           0, 0 },
 318         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004B,
 319           0,
 320           0, 0 },
 321         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004C,
 322           0,
 323           0, 0 },
 324         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004D,
 325           0,
 326           0, 0 },
 327         { ATTO_VENDOR_ID, 0x0049,         ATTO_VENDOR_ID, 0x004E,
 328           0,
 329           0, 0 },
 330         { 0,              0,              0,              0,
 331           0,
 332           0, 0 }
 333 };
 334
 335 MODULE_DEVICE_TABLE(pci, esas2r_pci_table);
 336
 337 static int
 338 esas2r_probe(struct pci_dev *pcid, const struct pci_device_id *id);
 339
 340 static void
 341 esas2r_remove(struct pci_dev *pcid);
 342
 343 static struct pci_driver
 344         esas2r_pci_driver = {
 345         .name           = ESAS2R_DRVR_NAME,
 346         .id_table       = esas2r_pci_table,
 347         .probe          = esas2r_probe,
 348         .remove         = esas2r_remove,
 349         .driver.pm      = &esas2r_pm_ops,
 350 };
 351
 352 static int esas2r_probe(struct pci_dev *pcid,
 353                         const struct pci_device_id *id)
 354 {
 355         struct Scsi_Host *host = NULL;
 356         struct esas2r_adapter *a;
 357         int err;
 358
 359         size_t host_alloc_size = sizeof(struct esas2r_adapter)
 360                                  + ((num_requests) +
 361                                     1) * sizeof(struct esas2r_request);
 362
 363         esas2r_log_dev(ESAS2R_LOG_DEBG, &(pcid->dev),
 364                        "esas2r_probe() 0x%02x 0x%02x 0x%02x 0x%02x",
 365                        pcid->vendor,
 366                        pcid->device,
 367                        pcid->subsystem_vendor,
 368                        pcid->subsystem_device);
 369
 370         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 371                        "before pci_enable_device() "
 372                        "enable_cnt: %d",
 373                        pcid->enable_cnt.counter);
 374
 375         err = pci_enable_device(pcid);
 376         if (err != 0) {
 377                 esas2r_log_dev(ESAS2R_LOG_CRIT, &(pcid->dev),
 378                                "pci_enable_device() FAIL (%d)",
 379                                err);
 380                 return -ENODEV;
 381         }
 382
 383         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 384                        "pci_enable_device() OK");
 385         esas2r_log_dev(ESAS2R_LOG_INFO, &(pcid->dev),
 386                        "after pci_enable_device() enable_cnt: %d",
 387                        pcid->enable_cnt.counter);
 388
 389         host = scsi_host_alloc(&driver_template, host_alloc_size);
 390         if (host == NULL) {
 391                 esas2r_log(ESAS2R_LOG_CRIT, "scsi_host_alloc() FAIL");
 392                 return -ENODEV;
 393         }
 394
 395         memset(host->hostdata, 0, host_alloc_size);
 396
 397         a = (struct esas2r_adapter *)host->hostdata;
 398
 399         esas2r_log(ESAS2R_LOG_INFO, "scsi_host_alloc() OK host: %p", host);
 400
 401         /* override max LUN and max target id */
 402
 403         host->max_id = ESAS2R_MAX_ID + 1;
 404         host->max_lun = 255;
 405
 406         /* we can handle 16-byte CDbs */
 407
 408         host->max_cmd_len = 16;
 409
 410         host->can_queue = can_queue;
 411         host->cmd_per_lun = cmd_per_lun;
 412         host->this_id = host->max_id + 1;
 413         host->max_channel = 0;
 414         host->unique_id = found_adapters;
 415         host->sg_tablesize = sg_tablesize;
 416         host->max_sectors = esas2r_max_sectors;
 417
 418         /* set to bus master for BIOses that don't do it for us */
 419
 420         esas2r_log(ESAS2R_LOG_INFO, "pci_set_master() called");
 421
 422         pci_set_master(pcid);
 423
 424         if (!esas2r_init_adapter(host, pcid, found_adapters)) {
 425                 esas2r_log(ESAS2R_LOG_CRIT,
 426                            "unable to initialize device at PCI bus %x:%x",
 427                            pcid->bus->number,
 428                            pcid->devfn);
 429
 430                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 431                                "scsi_host_put() called");
 432
 433                 scsi_host_put(host);
 434
 435                 return 0;
 436
 437         }
 438
 439         esas2r_log(ESAS2R_LOG_INFO, "pci_set_drvdata(%p, %p) called", pcid,
 440                    host->hostdata);
 441
 442         pci_set_drvdata(pcid, host);
 443
 444         esas2r_log(ESAS2R_LOG_INFO, "scsi_add_host() called");
 445
 446         err = scsi_add_host(host, &pcid->dev);
 447
 448         if (err) {
 449                 esas2r_log(ESAS2R_LOG_CRIT, "scsi_add_host returned %d", err);
 450                 esas2r_log_dev(ESAS2R_LOG_CRIT, &(host->shost_gendev),
 451                                "scsi_add_host() FAIL");
 452
 453                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 454                                "scsi_host_put() called");
 455
 456                 scsi_host_put(host);
 457
 458                 esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 459                                "pci_set_drvdata(%p, NULL) called",
 460                                pcid);
 461
 462                 pci_set_drvdata(pcid, NULL);
 463
 464                 return -ENODEV;
 465         }
 466
 467
 468         esas2r_fw_event_on(a);
 469
 470         esas2r_log_dev(ESAS2R_LOG_INFO, &(host->shost_gendev),
 471                        "scsi_scan_host() called");
 472
 473         scsi_scan_host(host);
 474
 475         /* Add sysfs binary files */
 476         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fw))
 477                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 478                                "Failed to create sysfs binary file: fw");
 479         else
 480                 a->sysfs_fw_created = 1;
 481
 482         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_fs))
 483                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 484                                "Failed to create sysfs binary file: fs");
 485         else
 486                 a->sysfs_fs_created = 1;
 487
 488         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_vda))
 489                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 490                                "Failed to create sysfs binary file: vda");
 491         else
 492                 a->sysfs_vda_created = 1;
 493
 494         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_hw))
 495                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 496                                "Failed to create sysfs binary file: hw");
 497         else
 498                 a->sysfs_hw_created = 1;
 499
 500         if (sysfs_create_bin_file(&host->shost_dev.kobj, &bin_attr_live_nvram))
 501                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 502                                "Failed to create sysfs binary file: live_nvram");
 503         else
 504                 a->sysfs_live_nvram_created = 1;
 505
 506         if (sysfs_create_bin_file(&host->shost_dev.kobj,
 507                                   &bin_attr_default_nvram))
 508                 esas2r_log_dev(ESAS2R_LOG_WARN, &(host->shost_gendev),
 509                                "Failed to create sysfs binary file: default_nvram");
 510         else
 511                 a->sysfs_default_nvram_created = 1;
 512
 513         found_adapters++;
 514
 515         return 0;
 516 }
 517
 518 static void esas2r_remove(struct pci_dev *pdev)
 519 {
 520         struct Scsi_Host *host = pci_get_drvdata(pdev);
 521         struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
 522
 523         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 524                        "esas2r_remove(%p) called; "
 525                        "host:%p", pdev,
 526                        host);
 527
 528         esas2r_kill_adapter(a->index);
 529         found_adapters--;
 530 }
 531
 532 static int __init esas2r_init(void)
 533 {
 534         int i;
 535
 536         esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
 537
 538         /* verify valid parameters */
 539
 540         if (can_queue < 1) {
 541                 esas2r_log(ESAS2R_LOG_WARN,
 542                            "warning: can_queue must be at least 1, value "
 543                            "forced.");
 544                 can_queue = 1;
 545         } else if (can_queue > 2048) {
 546                 esas2r_log(ESAS2R_LOG_WARN,
 547                            "warning: can_queue must be no larger than 2048, "
 548                            "value forced.");
 549                 can_queue = 2048;
 550         }
 551
 552         if (cmd_per_lun < 1) {
 553                 esas2r_log(ESAS2R_LOG_WARN,
 554                            "warning: cmd_per_lun must be at least 1, value "
 555                            "forced.");
 556                 cmd_per_lun = 1;
 557         } else if (cmd_per_lun > 2048) {
 558                 esas2r_log(ESAS2R_LOG_WARN,
 559                            "warning: cmd_per_lun must be no larger than "
 560                            "2048, value forced.");
 561                 cmd_per_lun = 2048;
 562         }
 563
 564         if (sg_tablesize < 32) {
 565                 esas2r_log(ESAS2R_LOG_WARN,
 566                            "warning: sg_tablesize must be at least 32, "
 567                            "value forced.");
 568                 sg_tablesize = 32;
 569         }
 570
 571         if (esas2r_max_sectors < 1) {
 572                 esas2r_log(ESAS2R_LOG_WARN,
 573                            "warning: esas2r_max_sectors must be at least "
 574                            "1, value forced.");
 575                 esas2r_max_sectors = 1;
 576         } else if (esas2r_max_sectors > 0xffff) {
 577                 esas2r_log(ESAS2R_LOG_WARN,
 578                            "warning: esas2r_max_sectors must be no larger "
 579                            "than 0xffff, value forced.");
 580                 esas2r_max_sectors = 0xffff;
 581         }
 582
 583         sgl_page_size &= ~(ESAS2R_SGL_ALIGN - 1);
 584
 585         if (sgl_page_size < SGL_PG_SZ_MIN)
 586                 sgl_page_size = SGL_PG_SZ_MIN;
 587         else if (sgl_page_size > SGL_PG_SZ_MAX)
 588                 sgl_page_size = SGL_PG_SZ_MAX;
 589
 590         if (num_sg_lists < NUM_SGL_MIN)
 591                 num_sg_lists = NUM_SGL_MIN;
 592         else if (num_sg_lists > NUM_SGL_MAX)
 593                 num_sg_lists = NUM_SGL_MAX;
 594
 595         if (num_requests < NUM_REQ_MIN)
 596                 num_requests = NUM_REQ_MIN;
 597         else if (num_requests > NUM_REQ_MAX)
 598                 num_requests = NUM_REQ_MAX;
 599
 600         if (num_ae_requests < NUM_AE_MIN)
 601                 num_ae_requests = NUM_AE_MIN;
 602         else if (num_ae_requests > NUM_AE_MAX)
 603                 num_ae_requests = NUM_AE_MAX;
 604
 605         /* set up other globals */
 606
 607         for (i = 0; i < MAX_ADAPTERS; i++)
 608                 esas2r_adapters[i] = NULL;
 609
 610         return pci_register_driver(&esas2r_pci_driver);
 611 }
 612
 613 /* Handle ioctl calls to "/proc/scsi/esas2r/ATTOnode" */
 614 static const struct file_operations esas2r_proc_fops = {
 615         .compat_ioctl   = compat_ptr_ioctl,
 616         .unlocked_ioctl = esas2r_proc_ioctl,
 617 };
 618
 619 static const struct proc_ops esas2r_proc_ops = {
 620         .proc_ioctl             = esas2r_proc_ioctl,
 621 #ifdef CONFIG_COMPAT
 622         .proc_compat_ioctl      = compat_ptr_ioctl,
 623 #endif
 624 };
 625
 626 static struct Scsi_Host *esas2r_proc_host;
 627 static int esas2r_proc_major;
 628
 629 long esas2r_proc_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
 630 {
 631         return esas2r_ioctl_handler(esas2r_proc_host->hostdata,
 632                                     cmd, (void __user *)arg);
 633 }
 634
 635 static void __exit esas2r_exit(void)
 636 {
 637         esas2r_log(ESAS2R_LOG_INFO, "%s called", __func__);
 638
 639         if (esas2r_proc_major > 0) {
 640                 esas2r_log(ESAS2R_LOG_INFO, "unregister proc");
 641
 642                 remove_proc_entry(ATTONODE_NAME,
 643                                   esas2r_proc_host->hostt->proc_dir);
 644                 unregister_chrdev(esas2r_proc_major, ESAS2R_DRVR_NAME);
 645
 646                 esas2r_proc_major = 0;
 647         }
 648
 649         esas2r_log(ESAS2R_LOG_INFO, "pci_unregister_driver() called");
 650
 651         pci_unregister_driver(&esas2r_pci_driver);
 652 }
 653
 654 int esas2r_show_info(struct seq_file *m, struct Scsi_Host *sh)
 655 {
 656         struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
 657
 658         struct esas2r_target *t;
 659         int dev_count = 0;
 660
 661         esas2r_log(ESAS2R_LOG_DEBG, "esas2r_show_info (%p,%d)", m, sh->host_no);
 662
 663         seq_printf(m, ESAS2R_LONGNAME "\n"
 664                    "Driver version: "ESAS2R_VERSION_STR "\n"
 665                    "Flash version: %s\n"
 666                    "Firmware version: %s\n"
 667                    "Copyright "ESAS2R_COPYRIGHT_YEARS "\n"
 668                    "http://www.attotech.com\n"
 669                    "\n",
 670                    a->flash_rev,
 671                    a->fw_rev[0] ? a->fw_rev : "(none)");
 672
 673
 674         seq_printf(m, "Adapter information:\n"
 675                    "--------------------\n"
 676                    "Model: %s\n"
 677                    "SAS address: %02X%02X%02X%02X:%02X%02X%02X%02X\n",
 678                    esas2r_get_model_name(a),
 679                    a->nvram->sas_addr[0],
 680                    a->nvram->sas_addr[1],
 681                    a->nvram->sas_addr[2],
 682                    a->nvram->sas_addr[3],
 683                    a->nvram->sas_addr[4],
 684                    a->nvram->sas_addr[5],
 685                    a->nvram->sas_addr[6],
 686                    a->nvram->sas_addr[7]);
 687
 688         seq_puts(m, "\n"
 689                    "Discovered devices:\n"
 690                    "\n"
 691                    "   #  Target ID\n"
 692                    "---------------\n");
 693
 694         for (t = a->targetdb; t < a->targetdb_end; t++)
 695                 if (t->buffered_target_state == TS_PRESENT) {
 696                         seq_printf(m, " %3d   %3d\n",
 697                                    ++dev_count,
 698                                    (u16)(uintptr_t)(t - a->targetdb));
 699                 }
 700
 701         if (dev_count == 0)
 702                 seq_puts(m, "none\n");
 703
 704         seq_putc(m, '\n');
 705         return 0;
 706
 707 }
 708
 709 const char *esas2r_info(struct Scsi_Host *sh)
 710 {
 711         struct esas2r_adapter *a = (struct esas2r_adapter *)sh->hostdata;
 712         static char esas2r_info_str[512];
 713
 714         esas2r_log_dev(ESAS2R_LOG_INFO, &(sh->shost_gendev),
 715                        "esas2r_info() called");
 716
 717         /*
 718          * if we haven't done so already, register as a char driver
 719          * and stick a node under "/proc/scsi/esas2r/ATTOnode"
 720          */
 721
 722         if (esas2r_proc_major <= 0) {
 723                 esas2r_proc_host = sh;
 724
 725                 esas2r_proc_major = register_chrdev(0, ESAS2R_DRVR_NAME,
 726                                                     &esas2r_proc_fops);
 727
 728                 esas2r_log_dev(ESAS2R_LOG_DEBG, &(sh->shost_gendev),
 729                                "register_chrdev (major %d)",
 730                                esas2r_proc_major);
 731
 732                 if (esas2r_proc_major > 0) {
 733                         struct proc_dir_entry *pde;
 734
 735                         pde = proc_create(ATTONODE_NAME, 0,
 736                                           sh->hostt->proc_dir,
 737                                           &esas2r_proc_ops);
 738
 739                         if (!pde) {
 740                                 esas2r_log_dev(ESAS2R_LOG_WARN,
 741                                                &(sh->shost_gendev),
 742                                                "failed to create_proc_entry");
 743                                 esas2r_proc_major = -1;
 744                         }
 745                 }
 746         }
 747
 748         sprintf(esas2r_info_str,
 749                 ESAS2R_LONGNAME " (bus 0x%02X, device 0x%02X, IRQ 0x%02X)"
 750                 " driver version: "ESAS2R_VERSION_STR "  firmware version: "
 751                 "%s\n",
 752                 a->pcid->bus->number, a->pcid->devfn, a->pcid->irq,
 753                 a->fw_rev[0] ? a->fw_rev : "(none)");
 754
 755         return esas2r_info_str;
 756 }
 757
 758 /* Callback for building a request scatter/gather list */
 759 static u32 get_physaddr_from_sgc(struct esas2r_sg_context *sgc, u64 *addr)
 760 {
 761         u32 len;
 762
 763         if (likely(sgc->cur_offset == sgc->exp_offset)) {
 764                 /*
 765                  * the normal case: caller used all bytes from previous call, so
 766                  * expected offset is the same as the current offset.
 767                  */
 768
 769                 if (sgc->sgel_count < sgc->num_sgel) {
 770                         /* retrieve next segment, except for first time */
 771                         if (sgc->exp_offset > (u8 *)0) {
 772                                 /* advance current segment */
 773                                 sgc->cur_sgel = sg_next(sgc->cur_sgel);
 774                                 ++(sgc->sgel_count);
 775                         }
 776
 777
 778                         len = sg_dma_len(sgc->cur_sgel);
 779                         (*addr) = sg_dma_address(sgc->cur_sgel);
 780
 781                         /* save the total # bytes returned to caller so far */
 782                         sgc->exp_offset += len;
 783
 784                 } else {
 785                         len = 0;
 786                 }
 787         } else if (sgc->cur_offset < sgc->exp_offset) {
 788                 /*
 789                  * caller did not use all bytes from previous call. need to
 790                  * compute the address based on current segment.
 791                  */
 792
 793                 len = sg_dma_len(sgc->cur_sgel);
 794                 (*addr) = sg_dma_address(sgc->cur_sgel);
 795
 796                 sgc->exp_offset -= len;
 797
 798                 /* calculate PA based on prev segment address and offsets */
 799                 *addr = *addr +
 800                         (sgc->cur_offset - sgc->exp_offset);
 801
 802                 sgc->exp_offset += len;
 803
 804                 /* re-calculate length based on offset */
 805                 len = lower_32_bits(
 806                         sgc->exp_offset - sgc->cur_offset);
 807         } else {   /* if ( sgc->cur_offset > sgc->exp_offset ) */
 808                    /*
 809                     * we don't expect the caller to skip ahead.
 810                     * cur_offset will never exceed the len we return
 811                     */
 812                 len = 0;
 813         }
 814
 815         return len;
 816 }
 817
 818 int esas2r_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 819 {
 820         struct esas2r_adapter *a =
 821                 (struct esas2r_adapter *)cmd->device->host->hostdata;
 822         struct esas2r_request *rq;
 823         struct esas2r_sg_context sgc;
 824         unsigned bufflen;
 825
 826         /* Assume success, if it fails we will fix the result later. */
 827         cmd->result = DID_OK << 16;
 828
 829         if (unlikely(test_bit(AF_DEGRADED_MODE, &a->flags))) {
 830                 cmd->result = DID_NO_CONNECT << 16;
 831                 cmd->scsi_done(cmd);
 832                 return 0;
 833         }
 834
 835         rq = esas2r_alloc_request(a);
 836         if (unlikely(rq == NULL)) {
 837                 esas2r_debug("esas2r_alloc_request failed");
 838                 return SCSI_MLQUEUE_HOST_BUSY;
 839         }
 840
 841         rq->cmd = cmd;
 842         bufflen = scsi_bufflen(cmd);
 843
 844         if (likely(bufflen != 0)) {
 845                 if (cmd->sc_data_direction == DMA_TO_DEVICE)
 846                         rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_WRD);
 847                 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
 848                         rq->vrq->scsi.flags |= cpu_to_le32(FCP_CMND_RDD);
 849         }
 850
 851         memcpy(rq->vrq->scsi.cdb, cmd->cmnd, cmd->cmd_len);
 852         rq->vrq->scsi.length = cpu_to_le32(bufflen);
 853         rq->target_id = cmd->device->id;
 854         rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
 855         rq->sense_buf = cmd->sense_buffer;
 856         rq->sense_len = SCSI_SENSE_BUFFERSIZE;
 857
 858         esas2r_sgc_init(&sgc, a, rq, NULL);
 859
 860         sgc.length = bufflen;
 861         sgc.cur_offset = NULL;
 862
 863         sgc.cur_sgel = scsi_sglist(cmd);
 864         sgc.exp_offset = NULL;
 865         sgc.num_sgel = scsi_dma_map(cmd);
 866         sgc.sgel_count = 0;
 867
 868         if (unlikely(sgc.num_sgel < 0)) {
 869                 esas2r_free_request(a, rq);
 870                 return SCSI_MLQUEUE_HOST_BUSY;
 871         }
 872
 873         sgc.get_phys_addr = (PGETPHYSADDR)get_physaddr_from_sgc;
 874
 875         if (unlikely(!esas2r_build_sg_list(a, rq, &sgc))) {
 876                 scsi_dma_unmap(cmd);
 877                 esas2r_free_request(a, rq);
 878                 return SCSI_MLQUEUE_HOST_BUSY;
 879         }
 880
 881         esas2r_debug("start request %p to %d:%d\n", rq, (int)cmd->device->id,
 882                      (int)cmd->device->lun);
 883
 884         esas2r_start_request(a, rq);
 885
 886         return 0;
 887 }
 888
 889 static void complete_task_management_request(struct esas2r_adapter *a,
 890                                              struct esas2r_request *rq)
 891 {
 892         (*rq->task_management_status_ptr) = rq->req_stat;
 893         esas2r_free_request(a, rq);
 894 }
 895
 896 /*
 897  * Searches the specified queue for the specified queue for the command
 898  * to abort.
 899  *
 900  * Return 0 on failure, 1 if command was not found, 2 if command was found
 901  */
 902 static int esas2r_check_active_queue(struct esas2r_adapter *a,
 903                                      struct esas2r_request **abort_request,
 904                                      struct scsi_cmnd *cmd,
 905                                      struct list_head *queue)
 906 {
 907         bool found = false;
 908         struct esas2r_request *ar = *abort_request;
 909         struct esas2r_request *rq;
 910         struct list_head *element, *next;
 911
 912         list_for_each_safe(element, next, queue) {
 913
 914                 rq = list_entry(element, struct esas2r_request, req_list);
 915
 916                 if (rq->cmd == cmd) {
 917
 918                         /* Found the request.  See what to do with it. */
 919                         if (queue == &a->active_list) {
 920                                 /*
 921                                  * We are searching the active queue, which
 922                                  * means that we need to send an abort request
 923                                  * to the firmware.
 924                                  */
 925                                 ar = esas2r_alloc_request(a);
 926                                 if (ar == NULL) {
 927                                         esas2r_log_dev(ESAS2R_LOG_WARN,
 928                                                        &(a->host->shost_gendev),
 929                                                        "unable to allocate an abort request for cmd %p",
 930                                                        cmd);
 931                                         return 0; /* Failure */
 932                                 }
 933
 934                                 /*
 935                                  * Task management request must be formatted
 936                                  * with a lock held.
 937                                  */
 938                                 ar->sense_len = 0;
 939                                 ar->vrq->scsi.length = 0;
 940                                 ar->target_id = rq->target_id;
 941                                 ar->vrq->scsi.flags |= cpu_to_le32(
 942                                         (u8)le32_to_cpu(rq->vrq->scsi.flags));
 943
 944                                 memset(ar->vrq->scsi.cdb, 0,
 945                                        sizeof(ar->vrq->scsi.cdb));
 946
 947                                 ar->vrq->scsi.flags |= cpu_to_le32(
 948                                         FCP_CMND_TRM);
 949                                 ar->vrq->scsi.u.abort_handle =
 950                                         rq->vrq->scsi.handle;
 951                         } else {
 952                                 /*
 953                                  * The request is pending but not active on
 954                                  * the firmware.  Just free it now and we'll
 955                                  * report the successful abort below.
 956                                  */
 957                                 list_del_init(&rq->req_list);
 958                                 esas2r_free_request(a, rq);
 959                         }
 960
 961                         found = true;
 962                         break;
 963                 }
 964
 965         }
 966
 967         if (!found)
 968                 return 1;       /* Not found */
 969
 970         return 2;               /* found */
 971
 972
 973 }
 974
 975 int esas2r_eh_abort(struct scsi_cmnd *cmd)
 976 {
 977         struct esas2r_adapter *a =
 978                 (struct esas2r_adapter *)cmd->device->host->hostdata;
 979         struct esas2r_request *abort_request = NULL;
 980         unsigned long flags;
 981         struct list_head *queue;
 982         int result;
 983
 984         esas2r_log(ESAS2R_LOG_INFO, "eh_abort (%p)", cmd);
 985
 986         if (test_bit(AF_DEGRADED_MODE, &a->flags)) {
 987                 cmd->result = DID_ABORT << 16;
 988
 989                 scsi_set_resid(cmd, 0);
 990
 991                 cmd->scsi_done(cmd);
 992
 993                 return SUCCESS;
 994         }
 995
 996         spin_lock_irqsave(&a->queue_lock, flags);
 997
 998         /*
 999          * Run through the defer and active queues looking for the request
1000          * to abort.
1001          */
1002
1003         queue = &a->defer_list;
1004
1005 check_active_queue:
1006
1007         result = esas2r_check_active_queue(a, &abort_request, cmd, queue);
1008
1009         if (!result) {
1010                 spin_unlock_irqrestore(&a->queue_lock, flags);
1011                 return FAILED;
1012         } else if (result == 2 && (queue == &a->defer_list)) {
1013                 queue = &a->active_list;
1014                 goto check_active_queue;
1015         }
1016
1017         spin_unlock_irqrestore(&a->queue_lock, flags);
1018
1019         if (abort_request) {
1020                 u8 task_management_status = RS_PENDING;
1021
1022                 /*
1023                  * the request is already active, so we need to tell
1024                  * the firmware to abort it and wait for the response.
1025                  */
1026
1027                 abort_request->comp_cb = complete_task_management_request;
1028                 abort_request->task_management_status_ptr =
1029                         &task_management_status;
1030
1031                 esas2r_start_request(a, abort_request);
1032
1033                 if (atomic_read(&a->disable_cnt) == 0)
1034                         esas2r_do_deferred_processes(a);
1035
1036                 while (task_management_status == RS_PENDING)
1037                         msleep(10);
1038
1039                 /*
1040                  * Once we get here, the original request will have been
1041                  * completed by the firmware and the abort request will have
1042                  * been cleaned up.  we're done!
1043                  */
1044
1045                 return SUCCESS;
1046         }
1047
1048         /*
1049          * If we get here, either we found the inactive request and
1050          * freed it, or we didn't find it at all.  Either way, success!
1051          */
1052
1053         cmd->result = DID_ABORT << 16;
1054
1055         scsi_set_resid(cmd, 0);
1056
1057         cmd->scsi_done(cmd);
1058
1059         return SUCCESS;
1060 }
1061
1062 static int esas2r_host_bus_reset(struct scsi_cmnd *cmd, bool host_reset)
1063 {
1064         struct esas2r_adapter *a =
1065                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1066
1067         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1068                 return FAILED;
1069
1070         if (host_reset)
1071                 esas2r_reset_adapter(a);
1072         else
1073                 esas2r_reset_bus(a);
1074
1075         /* above call sets the AF_OS_RESET flag.  wait for it to clear. */
1076
1077         while (test_bit(AF_OS_RESET, &a->flags)) {
1078                 msleep(10);
1079
1080                 if (test_bit(AF_DEGRADED_MODE, &a->flags))
1081                         return FAILED;
1082         }
1083
1084         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1085                 return FAILED;
1086
1087         return SUCCESS;
1088 }
1089
1090 int esas2r_host_reset(struct scsi_cmnd *cmd)
1091 {
1092         esas2r_log(ESAS2R_LOG_INFO, "host_reset (%p)", cmd);
1093
1094         return esas2r_host_bus_reset(cmd, true);
1095 }
1096
1097 int esas2r_bus_reset(struct scsi_cmnd *cmd)
1098 {
1099         esas2r_log(ESAS2R_LOG_INFO, "bus_reset (%p)", cmd);
1100
1101         return esas2r_host_bus_reset(cmd, false);
1102 }
1103
1104 static int esas2r_dev_targ_reset(struct scsi_cmnd *cmd, bool target_reset)
1105 {
1106         struct esas2r_adapter *a =
1107                 (struct esas2r_adapter *)cmd->device->host->hostdata;
1108         struct esas2r_request *rq;
1109         u8 task_management_status = RS_PENDING;
1110         bool completed;
1111
1112         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1113                 return FAILED;
1114
1115 retry:
1116         rq = esas2r_alloc_request(a);
1117         if (rq == NULL) {
1118                 if (target_reset) {
1119                         esas2r_log(ESAS2R_LOG_CRIT,
1120                                    "unable to allocate a request for a "
1121                                    "target reset (%d)!",
1122                                    cmd->device->id);
1123                 } else {
1124                         esas2r_log(ESAS2R_LOG_CRIT,
1125                                    "unable to allocate a request for a "
1126                                    "device reset (%d:%llu)!",
1127                                    cmd->device->id,
1128                                    cmd->device->lun);
1129                 }
1130
1131
1132                 return FAILED;
1133         }
1134
1135         rq->target_id = cmd->device->id;
1136         rq->vrq->scsi.flags |= cpu_to_le32(cmd->device->lun);
1137         rq->req_stat = RS_PENDING;
1138
1139         rq->comp_cb = complete_task_management_request;
1140         rq->task_management_status_ptr = &task_management_status;
1141
1142         if (target_reset) {
1143                 esas2r_debug("issuing target reset (%p) to id %d", rq,
1144                              cmd->device->id);
1145                 completed = esas2r_send_task_mgmt(a, rq, 0x20);
1146         } else {
1147                 esas2r_debug("issuing device reset (%p) to id %d lun %d", rq,
1148                              cmd->device->id, cmd->device->lun);
1149                 completed = esas2r_send_task_mgmt(a, rq, 0x10);
1150         }
1151
1152         if (completed) {
1153                 /* Task management cmd completed right away, need to free it. */
1154
1155                 esas2r_free_request(a, rq);
1156         } else {
1157                 /*
1158                  * Wait for firmware to complete the request.  Completion
1159                  * callback will free it.
1160                  */
1161                 while (task_management_status == RS_PENDING)
1162                         msleep(10);
1163         }
1164
1165         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1166                 return FAILED;
1167
1168         if (task_management_status == RS_BUSY) {
1169                 /*
1170                  * Busy, probably because we are flashing.  Wait a bit and
1171                  * try again.
1172                  */
1173                 msleep(100);
1174                 goto retry;
1175         }
1176
1177         return SUCCESS;
1178 }
1179
1180 int esas2r_device_reset(struct scsi_cmnd *cmd)
1181 {
1182         esas2r_log(ESAS2R_LOG_INFO, "device_reset (%p)", cmd);
1183
1184         return esas2r_dev_targ_reset(cmd, false);
1185
1186 }
1187
1188 int esas2r_target_reset(struct scsi_cmnd *cmd)
1189 {
1190         esas2r_log(ESAS2R_LOG_INFO, "target_reset (%p)", cmd);
1191
1192         return esas2r_dev_targ_reset(cmd, true);
1193 }
1194
1195 void esas2r_log_request_failure(struct esas2r_adapter *a,
1196                                 struct esas2r_request *rq)
1197 {
1198         u8 reqstatus = rq->req_stat;
1199
1200         if (reqstatus == RS_SUCCESS)
1201                 return;
1202
1203         if (rq->vrq->scsi.function == VDA_FUNC_SCSI) {
1204                 if (reqstatus == RS_SCSI_ERROR) {
1205                         if (rq->func_rsp.scsi_rsp.sense_len >= 13) {
1206                                 esas2r_log(ESAS2R_LOG_WARN,
1207                                            "request failure - SCSI error %x ASC:%x ASCQ:%x CDB:%x",
1208                                            rq->sense_buf[2], rq->sense_buf[12],
1209                                            rq->sense_buf[13],
1210                                            rq->vrq->scsi.cdb[0]);
1211                         } else {
1212                                 esas2r_log(ESAS2R_LOG_WARN,
1213                                            "request failure - SCSI error CDB:%x\n",
1214                                            rq->vrq->scsi.cdb[0]);
1215                         }
1216                 } else if ((rq->vrq->scsi.cdb[0] != INQUIRY
1217                             && rq->vrq->scsi.cdb[0] != REPORT_LUNS)
1218                            || (reqstatus != RS_SEL
1219                                && reqstatus != RS_SEL2)) {
1220                         if ((reqstatus == RS_UNDERRUN) &&
1221                             (rq->vrq->scsi.cdb[0] == INQUIRY)) {
1222                                 /* Don't log inquiry underruns */
1223                         } else {
1224                                 esas2r_log(ESAS2R_LOG_WARN,
1225                                            "request failure - cdb:%x reqstatus:%d target:%d",
1226                                            rq->vrq->scsi.cdb[0], reqstatus,
1227                                            rq->target_id);
1228                         }
1229                 }
1230         }
1231 }
1232
1233 void esas2r_wait_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1234 {
1235         u32 starttime;
1236         u32 timeout;
1237
1238         starttime = jiffies_to_msecs(jiffies);
1239         timeout = rq->timeout ? rq->timeout : 5000;
1240
1241         while (true) {
1242                 esas2r_polled_interrupt(a);
1243
1244                 if (rq->req_stat != RS_STARTED)
1245                         break;
1246
1247                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1248
1249                 if ((jiffies_to_msecs(jiffies) - starttime) > timeout) {
1250                         esas2r_hdebug("request TMO");
1251                         esas2r_bugon();
1252
1253                         rq->req_stat = RS_TIMEOUT;
1254
1255                         esas2r_local_reset_adapter(a);
1256                         return;
1257                 }
1258         }
1259 }
1260
1261 u32 esas2r_map_data_window(struct esas2r_adapter *a, u32 addr_lo)
1262 {
1263         u32 offset = addr_lo & (MW_DATA_WINDOW_SIZE - 1);
1264         u32 base = addr_lo & -(signed int)MW_DATA_WINDOW_SIZE;
1265
1266         if (a->window_base != base) {
1267                 esas2r_write_register_dword(a, MVR_PCI_WIN1_REMAP,
1268                                             base | MVRPW1R_ENABLE);
1269                 esas2r_flush_register_dword(a, MVR_PCI_WIN1_REMAP);
1270                 a->window_base = base;
1271         }
1272
1273         return offset;
1274 }
1275
1276 /* Read a block of data from chip memory */
1277 bool esas2r_read_mem_block(struct esas2r_adapter *a,
1278                            void *to,
1279                            u32 from,
1280                            u32 size)
1281 {
1282         u8 *end = (u8 *)to;
1283
1284         while (size) {
1285                 u32 len;
1286                 u32 offset;
1287                 u32 iatvr;
1288
1289                 iatvr = (from & -(signed int)MW_DATA_WINDOW_SIZE);
1290
1291                 esas2r_map_data_window(a, iatvr);
1292
1293                 offset = from & (MW_DATA_WINDOW_SIZE - 1);
1294                 len = size;
1295
1296                 if (len > MW_DATA_WINDOW_SIZE - offset)
1297                         len = MW_DATA_WINDOW_SIZE - offset;
1298
1299                 from += len;
1300                 size -= len;
1301
1302                 while (len--) {
1303                         *end++ = esas2r_read_data_byte(a, offset);
1304                         offset++;
1305                 }
1306         }
1307
1308         return true;
1309 }
1310
1311 void esas2r_nuxi_mgt_data(u8 function, void *data)
1312 {
1313         struct atto_vda_grp_info *g;
1314         struct atto_vda_devinfo *d;
1315         struct atto_vdapart_info *p;
1316         struct atto_vda_dh_info *h;
1317         struct atto_vda_metrics_info *m;
1318         struct atto_vda_schedule_info *s;
1319         struct atto_vda_buzzer_info *b;
1320         u8 i;
1321
1322         switch (function) {
1323         case VDAMGT_BUZZER_INFO:
1324         case VDAMGT_BUZZER_SET:
1325
1326                 b = (struct atto_vda_buzzer_info *)data;
1327
1328                 b->duration = le32_to_cpu(b->duration);
1329                 break;
1330
1331         case VDAMGT_SCHEDULE_INFO:
1332         case VDAMGT_SCHEDULE_EVENT:
1333
1334                 s = (struct atto_vda_schedule_info *)data;
1335
1336                 s->id = le32_to_cpu(s->id);
1337
1338                 break;
1339
1340         case VDAMGT_DEV_INFO:
1341         case VDAMGT_DEV_CLEAN:
1342         case VDAMGT_DEV_PT_INFO:
1343         case VDAMGT_DEV_FEATURES:
1344         case VDAMGT_DEV_PT_FEATURES:
1345         case VDAMGT_DEV_OPERATION:
1346
1347                 d = (struct atto_vda_devinfo *)data;
1348
1349                 d->capacity = le64_to_cpu(d->capacity);
1350                 d->block_size = le32_to_cpu(d->block_size);
1351                 d->ses_dev_index = le16_to_cpu(d->ses_dev_index);
1352                 d->target_id = le16_to_cpu(d->target_id);
1353                 d->lun = le16_to_cpu(d->lun);
1354                 d->features = le16_to_cpu(d->features);
1355                 break;
1356
1357         case VDAMGT_GRP_INFO:
1358         case VDAMGT_GRP_CREATE:
1359         case VDAMGT_GRP_DELETE:
1360         case VDAMGT_ADD_STORAGE:
1361         case VDAMGT_MEMBER_ADD:
1362         case VDAMGT_GRP_COMMIT:
1363         case VDAMGT_GRP_REBUILD:
1364         case VDAMGT_GRP_COMMIT_INIT:
1365         case VDAMGT_QUICK_RAID:
1366         case VDAMGT_GRP_FEATURES:
1367         case VDAMGT_GRP_COMMIT_INIT_AUTOMAP:
1368         case VDAMGT_QUICK_RAID_INIT_AUTOMAP:
1369         case VDAMGT_SPARE_LIST:
1370         case VDAMGT_SPARE_ADD:
1371         case VDAMGT_SPARE_REMOVE:
1372         case VDAMGT_LOCAL_SPARE_ADD:
1373         case VDAMGT_GRP_OPERATION:
1374
1375                 g = (struct atto_vda_grp_info *)data;
1376
1377                 g->capacity = le64_to_cpu(g->capacity);
1378                 g->block_size = le32_to_cpu(g->block_size);
1379                 g->interleave = le32_to_cpu(g->interleave);
1380                 g->features = le16_to_cpu(g->features);
1381
1382                 for (i = 0; i < 32; i++)
1383                         g->members[i] = le16_to_cpu(g->members[i]);
1384
1385                 break;
1386
1387         case VDAMGT_PART_INFO:
1388         case VDAMGT_PART_MAP:
1389         case VDAMGT_PART_UNMAP:
1390         case VDAMGT_PART_AUTOMAP:
1391         case VDAMGT_PART_SPLIT:
1392         case VDAMGT_PART_MERGE:
1393
1394                 p = (struct atto_vdapart_info *)data;
1395
1396                 p->part_size = le64_to_cpu(p->part_size);
1397                 p->start_lba = le32_to_cpu(p->start_lba);
1398                 p->block_size = le32_to_cpu(p->block_size);
1399                 p->target_id = le16_to_cpu(p->target_id);
1400                 break;
1401
1402         case VDAMGT_DEV_HEALTH_REQ:
1403
1404                 h = (struct atto_vda_dh_info *)data;
1405
1406                 h->med_defect_cnt = le32_to_cpu(h->med_defect_cnt);
1407                 h->info_exc_cnt = le32_to_cpu(h->info_exc_cnt);
1408                 break;
1409
1410         case VDAMGT_DEV_METRICS:
1411
1412                 m = (struct atto_vda_metrics_info *)data;
1413
1414                 for (i = 0; i < 32; i++)
1415                         m->dev_indexes[i] = le16_to_cpu(m->dev_indexes[i]);
1416
1417                 break;
1418
1419         default:
1420                 break;
1421         }
1422 }
1423
1424 void esas2r_nuxi_cfg_data(u8 function, void *data)
1425 {
1426         struct atto_vda_cfg_init *ci;
1427
1428         switch (function) {
1429         case VDA_CFG_INIT:
1430         case VDA_CFG_GET_INIT:
1431         case VDA_CFG_GET_INIT2:
1432
1433                 ci = (struct atto_vda_cfg_init *)data;
1434
1435                 ci->date_time.year = le16_to_cpu(ci->date_time.year);
1436                 ci->sgl_page_size = le32_to_cpu(ci->sgl_page_size);
1437                 ci->vda_version = le32_to_cpu(ci->vda_version);
1438                 ci->epoch_time = le32_to_cpu(ci->epoch_time);
1439                 ci->ioctl_tunnel = le32_to_cpu(ci->ioctl_tunnel);
1440                 ci->num_targets_backend = le32_to_cpu(ci->num_targets_backend);
1441                 break;
1442
1443         default:
1444                 break;
1445         }
1446 }
1447
1448 void esas2r_nuxi_ae_data(union atto_vda_ae *ae)
1449 {
1450         struct atto_vda_ae_raid *r = &ae->raid;
1451         struct atto_vda_ae_lu *l = &ae->lu;
1452
1453         switch (ae->hdr.bytype) {
1454         case VDAAE_HDR_TYPE_RAID:
1455
1456                 r->dwflags = le32_to_cpu(r->dwflags);
1457                 break;
1458
1459         case VDAAE_HDR_TYPE_LU:
1460
1461                 l->dwevent = le32_to_cpu(l->dwevent);
1462                 l->wphys_target_id = le16_to_cpu(l->wphys_target_id);
1463                 l->id.tgtlun.wtarget_id = le16_to_cpu(l->id.tgtlun.wtarget_id);
1464
1465                 if (l->hdr.bylength >= offsetof(struct atto_vda_ae_lu, id)
1466                     + sizeof(struct atto_vda_ae_lu_tgt_lun_raid)) {
1467                         l->id.tgtlun_raid.dwinterleave
1468                                 = le32_to_cpu(l->id.tgtlun_raid.dwinterleave);
1469                         l->id.tgtlun_raid.dwblock_size
1470                                 = le32_to_cpu(l->id.tgtlun_raid.dwblock_size);
1471                 }
1472
1473                 break;
1474
1475         case VDAAE_HDR_TYPE_DISK:
1476         default:
1477                 break;
1478         }
1479 }
1480
1481 void esas2r_free_request(struct esas2r_adapter *a, struct esas2r_request *rq)
1482 {
1483         unsigned long flags;
1484
1485         esas2r_rq_destroy_request(rq, a);
1486         spin_lock_irqsave(&a->request_lock, flags);
1487         list_add(&rq->comp_list, &a->avail_request);
1488         spin_unlock_irqrestore(&a->request_lock, flags);
1489 }
1490
1491 struct esas2r_request *esas2r_alloc_request(struct esas2r_adapter *a)
1492 {
1493         struct esas2r_request *rq;
1494         unsigned long flags;
1495
1496         spin_lock_irqsave(&a->request_lock, flags);
1497
1498         if (unlikely(list_empty(&a->avail_request))) {
1499                 spin_unlock_irqrestore(&a->request_lock, flags);
1500                 return NULL;
1501         }
1502
1503         rq = list_first_entry(&a->avail_request, struct esas2r_request,
1504                               comp_list);
1505         list_del(&rq->comp_list);
1506         spin_unlock_irqrestore(&a->request_lock, flags);
1507         esas2r_rq_init_request(rq, a);
1508
1509         return rq;
1510
1511 }
1512
1513 void esas2r_complete_request_cb(struct esas2r_adapter *a,
1514                                 struct esas2r_request *rq)
1515 {
1516         esas2r_debug("completing request %p\n", rq);
1517
1518         scsi_dma_unmap(rq->cmd);
1519
1520         if (unlikely(rq->req_stat != RS_SUCCESS)) {
1521                 esas2r_debug("[%x STATUS %x:%x (%x)]", rq->target_id,
1522                              rq->req_stat,
1523                              rq->func_rsp.scsi_rsp.scsi_stat,
1524                              rq->cmd);
1525
1526                 rq->cmd->result =
1527                         ((esas2r_req_status_to_error(rq->req_stat) << 16)
1528                          | (rq->func_rsp.scsi_rsp.scsi_stat & STATUS_MASK));
1529
1530                 if (rq->req_stat == RS_UNDERRUN)
1531                         scsi_set_resid(rq->cmd,
1532                                        le32_to_cpu(rq->func_rsp.scsi_rsp.
1533                                                    residual_length));
1534                 else
1535                         scsi_set_resid(rq->cmd, 0);
1536         }
1537
1538         rq->cmd->scsi_done(rq->cmd);
1539
1540         esas2r_free_request(a, rq);
1541 }
1542
1543 /* Run tasklet to handle stuff outside of interrupt context. */
1544 void esas2r_adapter_tasklet(unsigned long context)
1545 {
1546         struct esas2r_adapter *a = (struct esas2r_adapter *)context;
1547
1548         if (unlikely(test_bit(AF2_TIMER_TICK, &a->flags2))) {
1549                 clear_bit(AF2_TIMER_TICK, &a->flags2);
1550                 esas2r_timer_tick(a);
1551         }
1552
1553         if (likely(test_bit(AF2_INT_PENDING, &a->flags2))) {
1554                 clear_bit(AF2_INT_PENDING, &a->flags2);
1555                 esas2r_adapter_interrupt(a);
1556         }
1557
1558         if (esas2r_is_tasklet_pending(a))
1559                 esas2r_do_tasklet_tasks(a);
1560
1561         if (esas2r_is_tasklet_pending(a)
1562             || (test_bit(AF2_INT_PENDING, &a->flags2))
1563             || (test_bit(AF2_TIMER_TICK, &a->flags2))) {
1564                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1565                 esas2r_schedule_tasklet(a);
1566         } else {
1567                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1568         }
1569 }
1570
1571 static void esas2r_timer_callback(struct timer_list *t);
1572
1573 void esas2r_kickoff_timer(struct esas2r_adapter *a)
1574 {
1575         timer_setup(&a->timer, esas2r_timer_callback, 0);
1576
1577         a->timer.expires = jiffies +
1578                            msecs_to_jiffies(100);
1579
1580         add_timer(&a->timer);
1581 }
1582
1583 static void esas2r_timer_callback(struct timer_list *t)
1584 {
1585         struct esas2r_adapter *a = from_timer(a, t, timer);
1586
1587         set_bit(AF2_TIMER_TICK, &a->flags2);
1588
1589         esas2r_schedule_tasklet(a);
1590
1591         esas2r_kickoff_timer(a);
1592 }
1593
1594 /*
1595  * Firmware events need to be handled outside of interrupt context
1596  * so we schedule a delayed_work to handle them.
1597  */
1598
1599 static void
1600 esas2r_free_fw_event(struct esas2r_fw_event_work *fw_event)
1601 {
1602         unsigned long flags;
1603         struct esas2r_adapter *a = fw_event->a;
1604
1605         spin_lock_irqsave(&a->fw_event_lock, flags);
1606         list_del(&fw_event->list);
1607         kfree(fw_event);
1608         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1609 }
1610
1611 void
1612 esas2r_fw_event_off(struct esas2r_adapter *a)
1613 {
1614         unsigned long flags;
1615
1616         spin_lock_irqsave(&a->fw_event_lock, flags);
1617         a->fw_events_off = 1;
1618         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1619 }
1620
1621 void
1622 esas2r_fw_event_on(struct esas2r_adapter *a)
1623 {
1624         unsigned long flags;
1625
1626         spin_lock_irqsave(&a->fw_event_lock, flags);
1627         a->fw_events_off = 0;
1628         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1629 }
1630
1631 static void esas2r_add_device(struct esas2r_adapter *a, u16 target_id)
1632 {
1633         int ret;
1634         struct scsi_device *scsi_dev;
1635
1636         scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1637
1638         if (scsi_dev) {
1639                 esas2r_log_dev(
1640                         ESAS2R_LOG_WARN,
1641                         &(scsi_dev->
1642                           sdev_gendev),
1643                         "scsi device already exists at id %d", target_id);
1644
1645                 scsi_device_put(scsi_dev);
1646         } else {
1647                 esas2r_log_dev(
1648                         ESAS2R_LOG_INFO,
1649                         &(a->host->
1650                           shost_gendev),
1651                         "scsi_add_device() called for 0:%d:0",
1652                         target_id);
1653
1654                 ret = scsi_add_device(a->host, 0, target_id, 0);
1655                 if (ret) {
1656                         esas2r_log_dev(
1657                                 ESAS2R_LOG_CRIT,
1658                                 &(a->host->
1659                                   shost_gendev),
1660                                 "scsi_add_device failed with %d for id %d",
1661                                 ret, target_id);
1662                 }
1663         }
1664 }
1665
1666 static void esas2r_remove_device(struct esas2r_adapter *a, u16 target_id)
1667 {
1668         struct scsi_device *scsi_dev;
1669
1670         scsi_dev = scsi_device_lookup(a->host, 0, target_id, 0);
1671
1672         if (scsi_dev) {
1673                 scsi_device_set_state(scsi_dev, SDEV_OFFLINE);
1674
1675                 esas2r_log_dev(
1676                         ESAS2R_LOG_INFO,
1677                         &(scsi_dev->
1678                           sdev_gendev),
1679                         "scsi_remove_device() called for 0:%d:0",
1680                         target_id);
1681
1682                 scsi_remove_device(scsi_dev);
1683
1684                 esas2r_log_dev(
1685                         ESAS2R_LOG_INFO,
1686                         &(scsi_dev->
1687                           sdev_gendev),
1688                         "scsi_device_put() called");
1689
1690                 scsi_device_put(scsi_dev);
1691         } else {
1692                 esas2r_log_dev(
1693                         ESAS2R_LOG_WARN,
1694                         &(a->host->shost_gendev),
1695                         "no target found at id %d",
1696                         target_id);
1697         }
1698 }
1699
1700 /*
1701  * Sends a firmware asynchronous event to anyone who happens to be
1702  * listening on the defined ATTO VDA event ports.
1703  */
1704 static void esas2r_send_ae_event(struct esas2r_fw_event_work *fw_event)
1705 {
1706         struct esas2r_vda_ae *ae = (struct esas2r_vda_ae *)fw_event->data;
1707         char *type;
1708
1709         switch (ae->vda_ae.hdr.bytype) {
1710         case VDAAE_HDR_TYPE_RAID:
1711                 type = "RAID group state change";
1712                 break;
1713
1714         case VDAAE_HDR_TYPE_LU:
1715                 type = "Mapped destination LU change";
1716                 break;
1717
1718         case VDAAE_HDR_TYPE_DISK:
1719                 type = "Physical disk inventory change";
1720                 break;
1721
1722         case VDAAE_HDR_TYPE_RESET:
1723                 type = "Firmware reset";
1724                 break;
1725
1726         case VDAAE_HDR_TYPE_LOG_INFO:
1727                 type = "Event Log message (INFO level)";
1728                 break;
1729
1730         case VDAAE_HDR_TYPE_LOG_WARN:
1731                 type = "Event Log message (WARN level)";
1732                 break;
1733
1734         case VDAAE_HDR_TYPE_LOG_CRIT:
1735                 type = "Event Log message (CRIT level)";
1736                 break;
1737
1738         case VDAAE_HDR_TYPE_LOG_FAIL:
1739                 type = "Event Log message (FAIL level)";
1740                 break;
1741
1742         case VDAAE_HDR_TYPE_NVC:
1743                 type = "NVCache change";
1744                 break;
1745
1746         case VDAAE_HDR_TYPE_TLG_INFO:
1747                 type = "Time stamped log message (INFO level)";
1748                 break;
1749
1750         case VDAAE_HDR_TYPE_TLG_WARN:
1751                 type = "Time stamped log message (WARN level)";
1752                 break;
1753
1754         case VDAAE_HDR_TYPE_TLG_CRIT:
1755                 type = "Time stamped log message (CRIT level)";
1756                 break;
1757
1758         case VDAAE_HDR_TYPE_PWRMGT:
1759                 type = "Power management";
1760                 break;
1761
1762         case VDAAE_HDR_TYPE_MUTE:
1763                 type = "Mute button pressed";
1764                 break;
1765
1766         case VDAAE_HDR_TYPE_DEV:
1767                 type = "Device attribute change";
1768                 break;
1769
1770         default:
1771                 type = "Unknown";
1772                 break;
1773         }
1774
1775         esas2r_log(ESAS2R_LOG_WARN,
1776                    "An async event of type \"%s\" was received from the firmware.  The event contents are:",
1777                    type);
1778         esas2r_log_hexdump(ESAS2R_LOG_WARN, &ae->vda_ae,
1779                            ae->vda_ae.hdr.bylength);
1780
1781 }
1782
1783 static void
1784 esas2r_firmware_event_work(struct work_struct *work)
1785 {
1786         struct esas2r_fw_event_work *fw_event =
1787                 container_of(work, struct esas2r_fw_event_work, work.work);
1788
1789         struct esas2r_adapter *a = fw_event->a;
1790
1791         u16 target_id = *(u16 *)&fw_event->data[0];
1792
1793         if (a->fw_events_off)
1794                 goto done;
1795
1796         switch (fw_event->type) {
1797         case fw_event_null:
1798                 break; /* do nothing */
1799
1800         case fw_event_lun_change:
1801                 esas2r_remove_device(a, target_id);
1802                 esas2r_add_device(a, target_id);
1803                 break;
1804
1805         case fw_event_present:
1806                 esas2r_add_device(a, target_id);
1807                 break;
1808
1809         case fw_event_not_present:
1810                 esas2r_remove_device(a, target_id);
1811                 break;
1812
1813         case fw_event_vda_ae:
1814                 esas2r_send_ae_event(fw_event);
1815                 break;
1816         }
1817
1818 done:
1819         esas2r_free_fw_event(fw_event);
1820 }
1821
1822 void esas2r_queue_fw_event(struct esas2r_adapter *a,
1823                            enum fw_event_type type,
1824                            void *data,
1825                            int data_sz)
1826 {
1827         struct esas2r_fw_event_work *fw_event;
1828         unsigned long flags;
1829
1830         fw_event = kzalloc(sizeof(struct esas2r_fw_event_work), GFP_ATOMIC);
1831         if (!fw_event) {
1832                 esas2r_log(ESAS2R_LOG_WARN,
1833                            "esas2r_queue_fw_event failed to alloc");
1834                 return;
1835         }
1836
1837         if (type == fw_event_vda_ae) {
1838                 struct esas2r_vda_ae *ae =
1839                         (struct esas2r_vda_ae *)fw_event->data;
1840
1841                 ae->signature = ESAS2R_VDA_EVENT_SIG;
1842                 ae->bus_number = a->pcid->bus->number;
1843                 ae->devfn = a->pcid->devfn;
1844                 memcpy(&ae->vda_ae, data, sizeof(ae->vda_ae));
1845         } else {
1846                 memcpy(fw_event->data, data, data_sz);
1847         }
1848
1849         fw_event->type = type;
1850         fw_event->a = a;
1851
1852         spin_lock_irqsave(&a->fw_event_lock, flags);
1853         list_add_tail(&fw_event->list, &a->fw_event_list);
1854         INIT_DELAYED_WORK(&fw_event->work, esas2r_firmware_event_work);
1855         queue_delayed_work_on(
1856                 smp_processor_id(), a->fw_event_q, &fw_event->work,
1857                 msecs_to_jiffies(1));
1858         spin_unlock_irqrestore(&a->fw_event_lock, flags);
1859 }
1860
1861 void esas2r_target_state_changed(struct esas2r_adapter *a, u16 targ_id,
1862                                  u8 state)
1863 {
1864         if (state == TS_LUN_CHANGE)
1865                 esas2r_queue_fw_event(a, fw_event_lun_change, &targ_id,
1866                                       sizeof(targ_id));
1867         else if (state == TS_PRESENT)
1868                 esas2r_queue_fw_event(a, fw_event_present, &targ_id,
1869                                       sizeof(targ_id));
1870         else if (state == TS_NOT_PRESENT)
1871                 esas2r_queue_fw_event(a, fw_event_not_present, &targ_id,
1872                                       sizeof(targ_id));
1873 }
1874
1875 /* Translate status to a Linux SCSI mid-layer error code */
1876 int esas2r_req_status_to_error(u8 req_stat)
1877 {
1878         switch (req_stat) {
1879         case RS_OVERRUN:
1880         case RS_UNDERRUN:
1881         case RS_SUCCESS:
1882         /*
1883          * NOTE: SCSI mid-layer wants a good status for a SCSI error, because
1884          *       it will check the scsi_stat value in the completion anyway.
1885          */
1886         case RS_SCSI_ERROR:
1887                 return DID_OK;
1888
1889         case RS_SEL:
1890         case RS_SEL2:
1891                 return DID_NO_CONNECT;
1892
1893         case RS_RESET:
1894                 return DID_RESET;
1895
1896         case RS_ABORTED:
1897                 return DID_ABORT;
1898
1899         case RS_BUSY:
1900                 return DID_BUS_BUSY;
1901         }
1902
1903         /* everything else is just an error. */
1904
1905         return DID_ERROR;
1906 }
1907
1908 module_init(esas2r_init);
1909 module_exit(esas2r_exit);