drivers/scsi/ses.c

   1 /*
   2  * SCSI Enclosure Services
   3  *
   4  * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
   5  *
   6 **-----------------------------------------------------------------------------
   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 **  version 2 as published by the Free Software Foundation.
  11 **
  12 **  This program is distributed in the hope that it will be useful,
  13 **  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 **  GNU General Public License for more details.
  16 **
  17 **  You should have received a copy of the GNU General Public License
  18 **  along with this program; if not, write to the Free Software
  19 **  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 **
  21 **-----------------------------------------------------------------------------
  22 */
  23
  24 #include <linux/module.h>
  25 #include <linux/kernel.h>
  26 #include <linux/enclosure.h>
  27
  28 #include <scsi/scsi.h>
  29 #include <scsi/scsi_cmnd.h>
  30 #include <scsi/scsi_dbg.h>
  31 #include <scsi/scsi_device.h>
  32 #include <scsi/scsi_driver.h>
  33 #include <scsi/scsi_host.h>
  34
  35 struct ses_device {
  36         unsigned char *page1;
  37         unsigned char *page2;
  38         unsigned char *page10;
  39         short page1_len;
  40         short page2_len;
  41         short page10_len;
  42 };
  43
  44 struct ses_component {
  45         u64 addr;
  46         unsigned char *desc;
  47 };
  48
  49 static int ses_probe(struct device *dev)
  50 {
  51         struct scsi_device *sdev = to_scsi_device(dev);
  52         int err = -ENODEV;
  53
  54         if (sdev->type != TYPE_ENCLOSURE)
  55                 goto out;
  56
  57         err = 0;
  58         sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n");
  59
  60  out:
  61         return err;
  62 }
  63
  64 #define SES_TIMEOUT (30 * HZ)
  65 #define SES_RETRIES 3
  66
  67 static int ses_recv_diag(struct scsi_device *sdev, int page_code,
  68                          void *buf, int bufflen)
  69 {
  70         unsigned char cmd[] = {
  71                 RECEIVE_DIAGNOSTIC,
  72                 1,              /* Set PCV bit */
  73                 page_code,
  74                 bufflen >> 8,
  75                 bufflen & 0xff,
  76                 0
  77         };
  78
  79         return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen,
  80                                 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
  81 }
  82
  83 static int ses_send_diag(struct scsi_device *sdev, int page_code,
  84                          void *buf, int bufflen)
  85 {
  86         u32 result;
  87
  88         unsigned char cmd[] = {
  89                 SEND_DIAGNOSTIC,
  90                 0x10,           /* Set PF bit */
  91                 0,
  92                 bufflen >> 8,
  93                 bufflen & 0xff,
  94                 0
  95         };
  96
  97         result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen,
  98                                   NULL, SES_TIMEOUT, SES_RETRIES, NULL);
  99         if (result)
 100                 sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n",
 101                             result);
 102         return result;
 103 }
 104
 105 static int ses_set_page2_descriptor(struct enclosure_device *edev,
 106                                       struct enclosure_component *ecomp,
 107                                       unsigned char *desc)
 108 {
 109         int i, j, count = 0, descriptor = ecomp->number;
 110         struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
 111         struct ses_device *ses_dev = edev->scratch;
 112         unsigned char *type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
 113         unsigned char *desc_ptr = ses_dev->page2 + 8;
 114
 115         /* Clear everything */
 116         memset(desc_ptr, 0, ses_dev->page2_len - 8);
 117         for (i = 0; i < ses_dev->page1[10]; i++, type_ptr += 4) {
 118                 for (j = 0; j < type_ptr[1]; j++) {
 119                         desc_ptr += 4;
 120                         if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
 121                             type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 122                                 continue;
 123                         if (count++ == descriptor) {
 124                                 memcpy(desc_ptr, desc, 4);
 125                                 /* set select */
 126                                 desc_ptr[0] |= 0x80;
 127                                 /* clear reserved, just in case */
 128                                 desc_ptr[0] &= 0xf0;
 129                         }
 130                 }
 131         }
 132
 133         return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
 134 }
 135
 136 static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
 137                                       struct enclosure_component *ecomp)
 138 {
 139         int i, j, count = 0, descriptor = ecomp->number;
 140         struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
 141         struct ses_device *ses_dev = edev->scratch;
 142         unsigned char *type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
 143         unsigned char *desc_ptr = ses_dev->page2 + 8;
 144
 145         ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
 146
 147         for (i = 0; i < ses_dev->page1[10]; i++, type_ptr += 4) {
 148                 for (j = 0; j < type_ptr[1]; j++) {
 149                         desc_ptr += 4;
 150                         if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
 151                             type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 152                                 continue;
 153                         if (count++ == descriptor)
 154                                 return desc_ptr;
 155                 }
 156         }
 157         return NULL;
 158 }
 159
 160 static void ses_get_fault(struct enclosure_device *edev,
 161                           struct enclosure_component *ecomp)
 162 {
 163         unsigned char *desc;
 164
 165         desc = ses_get_page2_descriptor(edev, ecomp);
 166         if (desc)
 167                 ecomp->fault = (desc[3] & 0x60) >> 4;
 168 }
 169
 170 static int ses_set_fault(struct enclosure_device *edev,
 171                           struct enclosure_component *ecomp,
 172                          enum enclosure_component_setting val)
 173 {
 174         unsigned char desc[4] = {0 };
 175
 176         switch (val) {
 177         case ENCLOSURE_SETTING_DISABLED:
 178                 /* zero is disabled */
 179                 break;
 180         case ENCLOSURE_SETTING_ENABLED:
 181                 desc[2] = 0x02;
 182                 break;
 183         default:
 184                 /* SES doesn't do the SGPIO blink settings */
 185                 return -EINVAL;
 186         }
 187
 188         return ses_set_page2_descriptor(edev, ecomp, desc);
 189 }
 190
 191 static void ses_get_status(struct enclosure_device *edev,
 192                            struct enclosure_component *ecomp)
 193 {
 194         unsigned char *desc;
 195
 196         desc = ses_get_page2_descriptor(edev, ecomp);
 197         if (desc)
 198                 ecomp->status = (desc[0] & 0x0f);
 199 }
 200
 201 static void ses_get_locate(struct enclosure_device *edev,
 202                            struct enclosure_component *ecomp)
 203 {
 204         unsigned char *desc;
 205
 206         desc = ses_get_page2_descriptor(edev, ecomp);
 207         if (desc)
 208                 ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
 209 }
 210
 211 static int ses_set_locate(struct enclosure_device *edev,
 212                           struct enclosure_component *ecomp,
 213                           enum enclosure_component_setting val)
 214 {
 215         unsigned char desc[4] = {0 };
 216
 217         switch (val) {
 218         case ENCLOSURE_SETTING_DISABLED:
 219                 /* zero is disabled */
 220                 break;
 221         case ENCLOSURE_SETTING_ENABLED:
 222                 desc[2] = 0x02;
 223                 break;
 224         default:
 225                 /* SES doesn't do the SGPIO blink settings */
 226                 return -EINVAL;
 227         }
 228         return ses_set_page2_descriptor(edev, ecomp, desc);
 229 }
 230
 231 static int ses_set_active(struct enclosure_device *edev,
 232                           struct enclosure_component *ecomp,
 233                           enum enclosure_component_setting val)
 234 {
 235         unsigned char desc[4] = {0 };
 236
 237         switch (val) {
 238         case ENCLOSURE_SETTING_DISABLED:
 239                 /* zero is disabled */
 240                 ecomp->active = 0;
 241                 break;
 242         case ENCLOSURE_SETTING_ENABLED:
 243                 desc[2] = 0x80;
 244                 ecomp->active = 1;
 245                 break;
 246         default:
 247                 /* SES doesn't do the SGPIO blink settings */
 248                 return -EINVAL;
 249         }
 250         return ses_set_page2_descriptor(edev, ecomp, desc);
 251 }
 252
 253 static struct enclosure_component_callbacks ses_enclosure_callbacks = {
 254         .get_fault              = ses_get_fault,
 255         .set_fault              = ses_set_fault,
 256         .get_status             = ses_get_status,
 257         .get_locate             = ses_get_locate,
 258         .set_locate             = ses_set_locate,
 259         .set_active             = ses_set_active,
 260 };
 261
 262 struct ses_host_edev {
 263         struct Scsi_Host *shost;
 264         struct enclosure_device *edev;
 265 };
 266
 267 int ses_match_host(struct enclosure_device *edev, void *data)
 268 {
 269         struct ses_host_edev *sed = data;
 270         struct scsi_device *sdev;
 271
 272         if (!scsi_is_sdev_device(edev->edev.parent))
 273                 return 0;
 274
 275         sdev = to_scsi_device(edev->edev.parent);
 276
 277         if (sdev->host != sed->shost)
 278                 return 0;
 279
 280         sed->edev = edev;
 281         return 1;
 282 }
 283
 284 static void ses_process_descriptor(struct enclosure_component *ecomp,
 285                                    unsigned char *desc)
 286 {
 287         int eip = desc[0] & 0x10;
 288         int invalid = desc[0] & 0x80;
 289         enum scsi_protocol proto = desc[0] & 0x0f;
 290         u64 addr = 0;
 291         struct ses_component *scomp = ecomp->scratch;
 292         unsigned char *d;
 293
 294         scomp->desc = desc;
 295
 296         if (invalid)
 297                 return;
 298
 299         switch (proto) {
 300         case SCSI_PROTOCOL_SAS:
 301                 if (eip)
 302                         d = desc + 8;
 303                 else
 304                         d = desc + 4;
 305                 /* only take the phy0 addr */
 306                 addr = (u64)d[12] << 56 |
 307                         (u64)d[13] << 48 |
 308                         (u64)d[14] << 40 |
 309                         (u64)d[15] << 32 |
 310                         (u64)d[16] << 24 |
 311                         (u64)d[17] << 16 |
 312                         (u64)d[18] << 8 |
 313                         (u64)d[19];
 314                 break;
 315         default:
 316                 /* FIXME: Need to add more protocols than just SAS */
 317                 break;
 318         }
 319         scomp->addr = addr;
 320 }
 321
 322 struct efd {
 323         u64 addr;
 324         struct device *dev;
 325 };
 326
 327 static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
 328                                       void *data)
 329 {
 330         struct efd *efd = data;
 331         int i;
 332         struct ses_component *scomp;
 333
 334         if (!edev->component[0].scratch)
 335                 return 0;
 336
 337         for (i = 0; i < edev->components; i++) {
 338                 scomp = edev->component[i].scratch;
 339                 if (scomp->addr != efd->addr)
 340                         continue;
 341
 342                 enclosure_add_device(edev, i, efd->dev);
 343                 return 1;
 344         }
 345         return 0;
 346 }
 347
 348 #define VPD_INQUIRY_SIZE 36
 349
 350 static void ses_match_to_enclosure(struct enclosure_device *edev,
 351                                    struct scsi_device *sdev)
 352 {
 353         unsigned char *buf = kmalloc(VPD_INQUIRY_SIZE, GFP_KERNEL);
 354         unsigned char *desc;
 355         u16 vpd_len;
 356         struct efd efd = {
 357                 .addr = 0,
 358         };
 359         unsigned char cmd[] = {
 360                 INQUIRY,
 361                 1,
 362                 0x83,
 363                 VPD_INQUIRY_SIZE >> 8,
 364                 VPD_INQUIRY_SIZE & 0xff,
 365                 0
 366         };
 367
 368         if (!buf)
 369                 return;
 370
 371         if (scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf,
 372                              VPD_INQUIRY_SIZE, NULL, SES_TIMEOUT, SES_RETRIES,
 373                              NULL))
 374                 goto free;
 375
 376         vpd_len = (buf[2] << 8) + buf[3];
 377         kfree(buf);
 378         buf = kmalloc(vpd_len, GFP_KERNEL);
 379         if (!buf)
 380                 return;
 381         cmd[3] = vpd_len >> 8;
 382         cmd[4] = vpd_len & 0xff;
 383         if (scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf,
 384                              vpd_len, NULL, SES_TIMEOUT, SES_RETRIES, NULL))
 385                 goto free;
 386
 387         desc = buf + 4;
 388         while (desc < buf + vpd_len) {
 389                 enum scsi_protocol proto = desc[0] >> 4;
 390                 u8 code_set = desc[0] & 0x0f;
 391                 u8 piv = desc[1] & 0x80;
 392                 u8 assoc = (desc[1] & 0x30) >> 4;
 393                 u8 type = desc[1] & 0x0f;
 394                 u8 len = desc[3];
 395
 396                 if (piv && code_set == 1 && assoc == 1 && code_set == 1
 397                     && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
 398                         efd.addr = (u64)desc[4] << 56 |
 399                                 (u64)desc[5] << 48 |
 400                                 (u64)desc[6] << 40 |
 401                                 (u64)desc[7] << 32 |
 402                                 (u64)desc[8] << 24 |
 403                                 (u64)desc[9] << 16 |
 404                                 (u64)desc[10] << 8 |
 405                                 (u64)desc[11];
 406
 407                 desc += len + 4;
 408         }
 409         if (!efd.addr)
 410                 goto free;
 411
 412         efd.dev = &sdev->sdev_gendev;
 413
 414         enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
 415  free:
 416         kfree(buf);
 417 }
 418
 419 #define INIT_ALLOC_SIZE 32
 420
 421 static int ses_intf_add(struct device *cdev,
 422                         struct class_interface *intf)
 423 {
 424         struct scsi_device *sdev = to_scsi_device(cdev->parent);
 425         struct scsi_device *tmp_sdev;
 426         unsigned char *buf = NULL, *hdr_buf, *type_ptr, *desc_ptr = NULL,
 427                 *addl_desc_ptr = NULL;
 428         struct ses_device *ses_dev;
 429         u32 result;
 430         int i, j, types, len, page7_len = 0, components = 0;
 431         int err = -ENOMEM;
 432         struct enclosure_device *edev;
 433         struct ses_component *scomp = NULL;
 434
 435         if (!scsi_device_enclosure(sdev)) {
 436                 /* not an enclosure, but might be in one */
 437                 edev = enclosure_find(&sdev->host->shost_gendev);
 438                 if (edev) {
 439                         ses_match_to_enclosure(edev, sdev);
 440                         put_device(&edev->edev);
 441                 }
 442                 return -ENODEV;
 443         }
 444
 445         /* TYPE_ENCLOSURE prints a message in probe */
 446         if (sdev->type != TYPE_ENCLOSURE)
 447                 sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");
 448
 449         ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
 450         hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
 451         if (!hdr_buf || !ses_dev)
 452                 goto err_init_free;
 453
 454         result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
 455         if (result)
 456                 goto recv_failed;
 457
 458         if (hdr_buf[1] != 0) {
 459                 /* FIXME: need subenclosure support; I've just never
 460                  * seen a device with subenclosures and it makes the
 461                  * traversal routines more complex */
 462                 sdev_printk(KERN_ERR, sdev,
 463                         "FIXME driver has no support for subenclosures (%d)\n",
 464                         hdr_buf[1]);
 465                 goto err_free;
 466         }
 467
 468         len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 469         buf = kzalloc(len, GFP_KERNEL);
 470         if (!buf)
 471                 goto err_free;
 472
 473         result = ses_recv_diag(sdev, 1, buf, len);
 474         if (result)
 475                 goto recv_failed;
 476
 477         types = buf[10];
 478
 479         type_ptr = buf + 12 + buf[11];
 480
 481         for (i = 0; i < types; i++, type_ptr += 4) {
 482                 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
 483                     type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 484                         components += type_ptr[1];
 485         }
 486         ses_dev->page1 = buf;
 487         ses_dev->page1_len = len;
 488         buf = NULL;
 489
 490         result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
 491         if (result)
 492                 goto recv_failed;
 493
 494         len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 495         buf = kzalloc(len, GFP_KERNEL);
 496         if (!buf)
 497                 goto err_free;
 498
 499         /* make sure getting page 2 actually works */
 500         result = ses_recv_diag(sdev, 2, buf, len);
 501         if (result)
 502                 goto recv_failed;
 503         ses_dev->page2 = buf;
 504         ses_dev->page2_len = len;
 505         buf = NULL;
 506
 507         /* The additional information page --- allows us
 508          * to match up the devices */
 509         result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
 510         if (!result) {
 511
 512                 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 513                 buf = kzalloc(len, GFP_KERNEL);
 514                 if (!buf)
 515                         goto err_free;
 516
 517                 result = ses_recv_diag(sdev, 10, buf, len);
 518                 if (result)
 519                         goto recv_failed;
 520                 ses_dev->page10 = buf;
 521                 ses_dev->page10_len = len;
 522                 buf = NULL;
 523         }
 524
 525         scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
 526         if (!scomp)
 527                 goto err_free;
 528
 529         edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
 530                                   components, &ses_enclosure_callbacks);
 531         if (IS_ERR(edev)) {
 532                 err = PTR_ERR(edev);
 533                 goto err_free;
 534         }
 535
 536         edev->scratch = ses_dev;
 537         for (i = 0; i < components; i++)
 538                 edev->component[i].scratch = scomp + i;
 539
 540         /* Page 7 for the descriptors is optional */
 541         result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
 542         if (result)
 543                 goto simple_populate;
 544
 545         page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 546         /* add 1 for trailing '\0' we'll use */
 547         buf = kzalloc(len + 1, GFP_KERNEL);
 548         if (!buf)
 549                 goto simple_populate;
 550         result = ses_recv_diag(sdev, 7, buf, len);
 551         if (result) {
 552  simple_populate:
 553                 kfree(buf);
 554                 buf = NULL;
 555                 desc_ptr = NULL;
 556                 addl_desc_ptr = NULL;
 557         } else {
 558                 desc_ptr = buf + 8;
 559                 len = (desc_ptr[2] << 8) + desc_ptr[3];
 560                 /* skip past overall descriptor */
 561                 desc_ptr += len + 4;
 562                 if (ses_dev->page10)
 563                         addl_desc_ptr = ses_dev->page10 + 8;
 564         }
 565         type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
 566         components = 0;
 567         for (i = 0; i < types; i++, type_ptr += 4) {
 568                 for (j = 0; j < type_ptr[1]; j++) {
 569                         char *name = NULL;
 570                         struct enclosure_component *ecomp;
 571
 572                         if (desc_ptr) {
 573                                 if (desc_ptr >= buf + page7_len) {
 574                                         desc_ptr = NULL;
 575                                 } else {
 576                                         len = (desc_ptr[2] << 8) + desc_ptr[3];
 577                                         desc_ptr += 4;
 578                                         /* Add trailing zero - pushes into
 579                                          * reserved space */
 580                                         desc_ptr[len] = '\0';
 581                                         name = desc_ptr;
 582                                 }
 583                         }
 584                         if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
 585                             type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
 586
 587                                 ecomp = enclosure_component_register(edev,
 588                                                              components++,
 589                                                              type_ptr[0],
 590                                                              name);
 591
 592                                 if (!IS_ERR(ecomp) && addl_desc_ptr)
 593                                         ses_process_descriptor(ecomp,
 594                                                                addl_desc_ptr);
 595                         }
 596                         if (desc_ptr)
 597                                 desc_ptr += len;
 598
 599                         if (addl_desc_ptr)
 600                                 addl_desc_ptr += addl_desc_ptr[1] + 2;
 601
 602                 }
 603         }
 604         kfree(buf);
 605         kfree(hdr_buf);
 606
 607         /* see if there are any devices matching before
 608          * we found the enclosure */
 609         shost_for_each_device(tmp_sdev, sdev->host) {
 610                 if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev))
 611                         continue;
 612                 ses_match_to_enclosure(edev, tmp_sdev);
 613         }
 614
 615         return 0;
 616
 617  recv_failed:
 618         sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
 619                     result);
 620         err = -ENODEV;
 621  err_free:
 622         kfree(buf);
 623         kfree(scomp);
 624         kfree(ses_dev->page10);
 625         kfree(ses_dev->page2);
 626         kfree(ses_dev->page1);
 627  err_init_free:
 628         kfree(ses_dev);
 629         kfree(hdr_buf);
 630         sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
 631         return err;
 632 }
 633
 634 static int ses_remove(struct device *dev)
 635 {
 636         return 0;
 637 }
 638
 639 static void ses_intf_remove(struct device *cdev,
 640                             struct class_interface *intf)
 641 {
 642         struct scsi_device *sdev = to_scsi_device(cdev->parent);
 643         struct enclosure_device *edev;
 644         struct ses_device *ses_dev;
 645
 646         if (!scsi_device_enclosure(sdev))
 647                 return;
 648
 649         edev = enclosure_find(cdev->parent);
 650         if (!edev)
 651                 return;
 652
 653         ses_dev = edev->scratch;
 654         edev->scratch = NULL;
 655
 656         kfree(ses_dev->page10);
 657         kfree(ses_dev->page1);
 658         kfree(ses_dev->page2);
 659         kfree(ses_dev);
 660
 661         kfree(edev->component[0].scratch);
 662
 663         put_device(&edev->edev);
 664         enclosure_unregister(edev);
 665 }
 666
 667 static struct class_interface ses_interface = {
 668         .add_dev        = ses_intf_add,
 669         .remove_dev     = ses_intf_remove,
 670 };
 671
 672 static struct scsi_driver ses_template = {
 673         .owner                  = THIS_MODULE,
 674         .gendrv = {
 675                 .name           = "ses",
 676                 .probe          = ses_probe,
 677                 .remove         = ses_remove,
 678         },
 679 };
 680
 681 static int __init ses_init(void)
 682 {
 683         int err;
 684
 685         err = scsi_register_interface(&ses_interface);
 686         if (err)
 687                 return err;
 688
 689         err = scsi_register_driver(&ses_template.gendrv);
 690         if (err)
 691                 goto out_unreg;
 692
 693         return 0;
 694
 695  out_unreg:
 696         scsi_unregister_interface(&ses_interface);
 697         return err;
 698 }
 699
 700 static void __exit ses_exit(void)
 701 {
 702         scsi_unregister_driver(&ses_template.gendrv);
 703         scsi_unregister_interface(&ses_interface);
 704 }
 705
 706 module_init(ses_init);
 707 module_exit(ses_exit);
 708
 709 MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);
 710
 711 MODULE_AUTHOR("James Bottomley");
 712 MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
 713 MODULE_LICENSE("GPL v2");