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 /* For device slot and array device slot elements, byte 3 bit 6
 161  * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this
 162  * code stands these bits are shifted 4 positions right so in
 163  * sysfs they will appear as bits 2 and 1 respectively. Strange. */
 164 static void ses_get_fault(struct enclosure_device *edev,
 165                           struct enclosure_component *ecomp)
 166 {
 167         unsigned char *desc;
 168
 169         desc = ses_get_page2_descriptor(edev, ecomp);
 170         if (desc)
 171                 ecomp->fault = (desc[3] & 0x60) >> 4;
 172 }
 173
 174 static int ses_set_fault(struct enclosure_device *edev,
 175                           struct enclosure_component *ecomp,
 176                          enum enclosure_component_setting val)
 177 {
 178         unsigned char desc[4] = {0 };
 179
 180         switch (val) {
 181         case ENCLOSURE_SETTING_DISABLED:
 182                 /* zero is disabled */
 183                 break;
 184         case ENCLOSURE_SETTING_ENABLED:
 185                 desc[3] = 0x20;
 186                 break;
 187         default:
 188                 /* SES doesn't do the SGPIO blink settings */
 189                 return -EINVAL;
 190         }
 191
 192         return ses_set_page2_descriptor(edev, ecomp, desc);
 193 }
 194
 195 static void ses_get_status(struct enclosure_device *edev,
 196                            struct enclosure_component *ecomp)
 197 {
 198         unsigned char *desc;
 199
 200         desc = ses_get_page2_descriptor(edev, ecomp);
 201         if (desc)
 202                 ecomp->status = (desc[0] & 0x0f);
 203 }
 204
 205 static void ses_get_locate(struct enclosure_device *edev,
 206                            struct enclosure_component *ecomp)
 207 {
 208         unsigned char *desc;
 209
 210         desc = ses_get_page2_descriptor(edev, ecomp);
 211         if (desc)
 212                 ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
 213 }
 214
 215 static int ses_set_locate(struct enclosure_device *edev,
 216                           struct enclosure_component *ecomp,
 217                           enum enclosure_component_setting val)
 218 {
 219         unsigned char desc[4] = {0 };
 220
 221         switch (val) {
 222         case ENCLOSURE_SETTING_DISABLED:
 223                 /* zero is disabled */
 224                 break;
 225         case ENCLOSURE_SETTING_ENABLED:
 226                 desc[2] = 0x02;
 227                 break;
 228         default:
 229                 /* SES doesn't do the SGPIO blink settings */
 230                 return -EINVAL;
 231         }
 232         return ses_set_page2_descriptor(edev, ecomp, desc);
 233 }
 234
 235 static int ses_set_active(struct enclosure_device *edev,
 236                           struct enclosure_component *ecomp,
 237                           enum enclosure_component_setting val)
 238 {
 239         unsigned char desc[4] = {0 };
 240
 241         switch (val) {
 242         case ENCLOSURE_SETTING_DISABLED:
 243                 /* zero is disabled */
 244                 ecomp->active = 0;
 245                 break;
 246         case ENCLOSURE_SETTING_ENABLED:
 247                 desc[2] = 0x80;
 248                 ecomp->active = 1;
 249                 break;
 250         default:
 251                 /* SES doesn't do the SGPIO blink settings */
 252                 return -EINVAL;
 253         }
 254         return ses_set_page2_descriptor(edev, ecomp, desc);
 255 }
 256
 257 static struct enclosure_component_callbacks ses_enclosure_callbacks = {
 258         .get_fault              = ses_get_fault,
 259         .set_fault              = ses_set_fault,
 260         .get_status             = ses_get_status,
 261         .get_locate             = ses_get_locate,
 262         .set_locate             = ses_set_locate,
 263         .set_active             = ses_set_active,
 264 };
 265
 266 struct ses_host_edev {
 267         struct Scsi_Host *shost;
 268         struct enclosure_device *edev;
 269 };
 270
 271 #if 0
 272 int ses_match_host(struct enclosure_device *edev, void *data)
 273 {
 274         struct ses_host_edev *sed = data;
 275         struct scsi_device *sdev;
 276
 277         if (!scsi_is_sdev_device(edev->edev.parent))
 278                 return 0;
 279
 280         sdev = to_scsi_device(edev->edev.parent);
 281
 282         if (sdev->host != sed->shost)
 283                 return 0;
 284
 285         sed->edev = edev;
 286         return 1;
 287 }
 288 #endif  /*  0  */
 289
 290 static void ses_process_descriptor(struct enclosure_component *ecomp,
 291                                    unsigned char *desc)
 292 {
 293         int eip = desc[0] & 0x10;
 294         int invalid = desc[0] & 0x80;
 295         enum scsi_protocol proto = desc[0] & 0x0f;
 296         u64 addr = 0;
 297         struct ses_component *scomp = ecomp->scratch;
 298         unsigned char *d;
 299
 300         scomp->desc = desc;
 301
 302         if (invalid)
 303                 return;
 304
 305         switch (proto) {
 306         case SCSI_PROTOCOL_SAS:
 307                 if (eip)
 308                         d = desc + 8;
 309                 else
 310                         d = desc + 4;
 311                 /* only take the phy0 addr */
 312                 addr = (u64)d[12] << 56 |
 313                         (u64)d[13] << 48 |
 314                         (u64)d[14] << 40 |
 315                         (u64)d[15] << 32 |
 316                         (u64)d[16] << 24 |
 317                         (u64)d[17] << 16 |
 318                         (u64)d[18] << 8 |
 319                         (u64)d[19];
 320                 break;
 321         default:
 322                 /* FIXME: Need to add more protocols than just SAS */
 323                 break;
 324         }
 325         scomp->addr = addr;
 326 }
 327
 328 struct efd {
 329         u64 addr;
 330         struct device *dev;
 331 };
 332
 333 static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
 334                                       void *data)
 335 {
 336         struct efd *efd = data;
 337         int i;
 338         struct ses_component *scomp;
 339
 340         if (!edev->component[0].scratch)
 341                 return 0;
 342
 343         for (i = 0; i < edev->components; i++) {
 344                 scomp = edev->component[i].scratch;
 345                 if (scomp->addr != efd->addr)
 346                         continue;
 347
 348                 enclosure_add_device(edev, i, efd->dev);
 349                 return 1;
 350         }
 351         return 0;
 352 }
 353
 354 #define INIT_ALLOC_SIZE 32
 355
 356 static void ses_enclosure_data_process(struct enclosure_device *edev,
 357                                        struct scsi_device *sdev,
 358                                        int create)
 359 {
 360         u32 result;
 361         unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
 362         int i, j, page7_len, len, components;
 363         struct ses_device *ses_dev = edev->scratch;
 364         int types = ses_dev->page1[10];
 365         unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
 366
 367         if (!hdr_buf)
 368                 goto simple_populate;
 369
 370         /* re-read page 10 */
 371         if (ses_dev->page10)
 372                 ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
 373         /* Page 7 for the descriptors is optional */
 374         result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
 375         if (result)
 376                 goto simple_populate;
 377
 378         page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 379         /* add 1 for trailing '\0' we'll use */
 380         buf = kzalloc(len + 1, GFP_KERNEL);
 381         if (!buf)
 382                 goto simple_populate;
 383         result = ses_recv_diag(sdev, 7, buf, len);
 384         if (result) {
 385  simple_populate:
 386                 kfree(buf);
 387                 buf = NULL;
 388                 desc_ptr = NULL;
 389                 len = 0;
 390                 page7_len = 0;
 391         } else {
 392                 desc_ptr = buf + 8;
 393                 len = (desc_ptr[2] << 8) + desc_ptr[3];
 394                 /* skip past overall descriptor */
 395                 desc_ptr += len + 4;
 396         }
 397         if (ses_dev->page10)
 398                 addl_desc_ptr = ses_dev->page10 + 8;
 399         type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
 400         components = 0;
 401         for (i = 0; i < types; i++, type_ptr += 4) {
 402                 for (j = 0; j < type_ptr[1]; j++) {
 403                         char *name = NULL;
 404                         struct enclosure_component *ecomp;
 405
 406                         if (desc_ptr) {
 407                                 if (desc_ptr >= buf + page7_len) {
 408                                         desc_ptr = NULL;
 409                                 } else {
 410                                         len = (desc_ptr[2] << 8) + desc_ptr[3];
 411                                         desc_ptr += 4;
 412                                         /* Add trailing zero - pushes into
 413                                          * reserved space */
 414                                         desc_ptr[len] = '\0';
 415                                         name = desc_ptr;
 416                                 }
 417                         }
 418                         if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
 419                             type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
 420
 421                                 if (create)
 422                                         ecomp = enclosure_component_register(edev,
 423                                                                              components++,
 424                                                                              type_ptr[0],
 425                                                                              name);
 426                                 else
 427                                         ecomp = &edev->component[components++];
 428
 429                                 if (!IS_ERR(ecomp) && addl_desc_ptr)
 430                                         ses_process_descriptor(ecomp,
 431                                                                addl_desc_ptr);
 432                         }
 433                         if (desc_ptr)
 434                                 desc_ptr += len;
 435
 436                         if (addl_desc_ptr)
 437                                 addl_desc_ptr += addl_desc_ptr[1] + 2;
 438
 439                 }
 440         }
 441         kfree(buf);
 442         kfree(hdr_buf);
 443 }
 444
 445 static void ses_match_to_enclosure(struct enclosure_device *edev,
 446                                    struct scsi_device *sdev)
 447 {
 448         unsigned char *buf;
 449         unsigned char *desc;
 450         unsigned int vpd_len;
 451         struct efd efd = {
 452                 .addr = 0,
 453         };
 454
 455         buf = scsi_get_vpd_page(sdev, 0x83);
 456         if (!buf)
 457                 return;
 458
 459         ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
 460
 461         vpd_len = ((buf[2] << 8) | buf[3]) + 4;
 462
 463         desc = buf + 4;
 464         while (desc < buf + vpd_len) {
 465                 enum scsi_protocol proto = desc[0] >> 4;
 466                 u8 code_set = desc[0] & 0x0f;
 467                 u8 piv = desc[1] & 0x80;
 468                 u8 assoc = (desc[1] & 0x30) >> 4;
 469                 u8 type = desc[1] & 0x0f;
 470                 u8 len = desc[3];
 471
 472                 if (piv && code_set == 1 && assoc == 1
 473                     && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
 474                         efd.addr = (u64)desc[4] << 56 |
 475                                 (u64)desc[5] << 48 |
 476                                 (u64)desc[6] << 40 |
 477                                 (u64)desc[7] << 32 |
 478                                 (u64)desc[8] << 24 |
 479                                 (u64)desc[9] << 16 |
 480                                 (u64)desc[10] << 8 |
 481                                 (u64)desc[11];
 482
 483                 desc += len + 4;
 484         }
 485         if (!efd.addr)
 486                 goto free;
 487
 488         efd.dev = &sdev->sdev_gendev;
 489
 490         enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
 491  free:
 492         kfree(buf);
 493 }
 494
 495 static int ses_intf_add(struct device *cdev,
 496                         struct class_interface *intf)
 497 {
 498         struct scsi_device *sdev = to_scsi_device(cdev->parent);
 499         struct scsi_device *tmp_sdev;
 500         unsigned char *buf = NULL, *hdr_buf, *type_ptr;
 501         struct ses_device *ses_dev;
 502         u32 result;
 503         int i, types, len, components = 0;
 504         int err = -ENOMEM;
 505         struct enclosure_device *edev;
 506         struct ses_component *scomp = NULL;
 507
 508         if (!scsi_device_enclosure(sdev)) {
 509                 /* not an enclosure, but might be in one */
 510                 struct enclosure_device *prev = NULL;
 511
 512                 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
 513                         ses_match_to_enclosure(edev, sdev);
 514                         prev = edev;
 515                 }
 516                 return -ENODEV;
 517         }
 518
 519         /* TYPE_ENCLOSURE prints a message in probe */
 520         if (sdev->type != TYPE_ENCLOSURE)
 521                 sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");
 522
 523         ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
 524         hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
 525         if (!hdr_buf || !ses_dev)
 526                 goto err_init_free;
 527
 528         result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
 529         if (result)
 530                 goto recv_failed;
 531
 532         if (hdr_buf[1] != 0) {
 533                 /* FIXME: need subenclosure support; I've just never
 534                  * seen a device with subenclosures and it makes the
 535                  * traversal routines more complex */
 536                 sdev_printk(KERN_ERR, sdev,
 537                         "FIXME driver has no support for subenclosures (%d)\n",
 538                         hdr_buf[1]);
 539                 goto err_free;
 540         }
 541
 542         len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 543         buf = kzalloc(len, GFP_KERNEL);
 544         if (!buf)
 545                 goto err_free;
 546
 547         result = ses_recv_diag(sdev, 1, buf, len);
 548         if (result)
 549                 goto recv_failed;
 550
 551         types = buf[10];
 552
 553         type_ptr = buf + 12 + buf[11];
 554
 555         for (i = 0; i < types; i++, type_ptr += 4) {
 556                 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
 557                     type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
 558                         components += type_ptr[1];
 559         }
 560         ses_dev->page1 = buf;
 561         ses_dev->page1_len = len;
 562         buf = NULL;
 563
 564         result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
 565         if (result)
 566                 goto recv_failed;
 567
 568         len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 569         buf = kzalloc(len, GFP_KERNEL);
 570         if (!buf)
 571                 goto err_free;
 572
 573         /* make sure getting page 2 actually works */
 574         result = ses_recv_diag(sdev, 2, buf, len);
 575         if (result)
 576                 goto recv_failed;
 577         ses_dev->page2 = buf;
 578         ses_dev->page2_len = len;
 579         buf = NULL;
 580
 581         /* The additional information page --- allows us
 582          * to match up the devices */
 583         result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
 584         if (!result) {
 585
 586                 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
 587                 buf = kzalloc(len, GFP_KERNEL);
 588                 if (!buf)
 589                         goto err_free;
 590
 591                 result = ses_recv_diag(sdev, 10, buf, len);
 592                 if (result)
 593                         goto recv_failed;
 594                 ses_dev->page10 = buf;
 595                 ses_dev->page10_len = len;
 596                 buf = NULL;
 597         }
 598         scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
 599         if (!scomp)
 600                 goto err_free;
 601
 602         edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
 603                                   components, &ses_enclosure_callbacks);
 604         if (IS_ERR(edev)) {
 605                 err = PTR_ERR(edev);
 606                 goto err_free;
 607         }
 608
 609         kfree(hdr_buf);
 610
 611         edev->scratch = ses_dev;
 612         for (i = 0; i < components; i++)
 613                 edev->component[i].scratch = scomp + i;
 614
 615         ses_enclosure_data_process(edev, sdev, 1);
 616
 617         /* see if there are any devices matching before
 618          * we found the enclosure */
 619         shost_for_each_device(tmp_sdev, sdev->host) {
 620                 if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev))
 621                         continue;
 622                 ses_match_to_enclosure(edev, tmp_sdev);
 623         }
 624
 625         return 0;
 626
 627  recv_failed:
 628         sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
 629                     result);
 630         err = -ENODEV;
 631  err_free:
 632         kfree(buf);
 633         kfree(scomp);
 634         kfree(ses_dev->page10);
 635         kfree(ses_dev->page2);
 636         kfree(ses_dev->page1);
 637  err_init_free:
 638         kfree(ses_dev);
 639         kfree(hdr_buf);
 640         sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
 641         return err;
 642 }
 643
 644 static int ses_remove(struct device *dev)
 645 {
 646         return 0;
 647 }
 648
 649 static void ses_intf_remove_component(struct scsi_device *sdev)
 650 {
 651         struct enclosure_device *edev, *prev = NULL;
 652
 653         while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
 654                 prev = edev;
 655                 if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
 656                         break;
 657         }
 658         if (edev)
 659                 put_device(&edev->edev);
 660 }
 661
 662 static void ses_intf_remove_enclosure(struct scsi_device *sdev)
 663 {
 664         struct enclosure_device *edev;
 665         struct ses_device *ses_dev;
 666
 667         /*  exact match to this enclosure */
 668         edev = enclosure_find(&sdev->sdev_gendev, NULL);
 669         if (!edev)
 670                 return;
 671
 672         ses_dev = edev->scratch;
 673         edev->scratch = NULL;
 674
 675         kfree(ses_dev->page10);
 676         kfree(ses_dev->page1);
 677         kfree(ses_dev->page2);
 678         kfree(ses_dev);
 679
 680         kfree(edev->component[0].scratch);
 681
 682         put_device(&edev->edev);
 683         enclosure_unregister(edev);
 684 }
 685
 686 static void ses_intf_remove(struct device *cdev,
 687                             struct class_interface *intf)
 688 {
 689         struct scsi_device *sdev = to_scsi_device(cdev->parent);
 690
 691         if (!scsi_device_enclosure(sdev))
 692                 ses_intf_remove_component(sdev);
 693         else
 694                 ses_intf_remove_enclosure(sdev);
 695 }
 696
 697 static struct class_interface ses_interface = {
 698         .add_dev        = ses_intf_add,
 699         .remove_dev     = ses_intf_remove,
 700 };
 701
 702 static struct scsi_driver ses_template = {
 703         .owner                  = THIS_MODULE,
 704         .gendrv = {
 705                 .name           = "ses",
 706                 .probe          = ses_probe,
 707                 .remove         = ses_remove,
 708         },
 709 };
 710
 711 static int __init ses_init(void)
 712 {
 713         int err;
 714
 715         err = scsi_register_interface(&ses_interface);
 716         if (err)
 717                 return err;
 718
 719         err = scsi_register_driver(&ses_template.gendrv);
 720         if (err)
 721                 goto out_unreg;
 722
 723         return 0;
 724
 725  out_unreg:
 726         scsi_unregister_interface(&ses_interface);
 727         return err;
 728 }
 729
 730 static void __exit ses_exit(void)
 731 {
 732         scsi_unregister_driver(&ses_template.gendrv);
 733         scsi_unregister_interface(&ses_interface);
 734 }
 735
 736 module_init(ses_init);
 737 module_exit(ses_exit);
 738
 739 MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);
 740
 741 MODULE_AUTHOR("James Bottomley");
 742 MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
 743 MODULE_LICENSE("GPL v2");