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24#include <linux/slab.h>
25#include <linux/module.h>
26#include <linux/kernel.h>
27#include <linux/enclosure.h>
28#include <asm/unaligned.h>
29
30#include <scsi/scsi.h>
31#include <scsi/scsi_cmnd.h>
32#include <scsi/scsi_dbg.h>
33#include <scsi/scsi_device.h>
34#include <scsi/scsi_driver.h>
35#include <scsi/scsi_host.h>
36
37#include <scsi/scsi_transport_sas.h>
38
39struct ses_device {
40 unsigned char *page1;
41 unsigned char *page1_types;
42 unsigned char *page2;
43 unsigned char *page10;
44 short page1_len;
45 short page1_num_types;
46 short page2_len;
47 short page10_len;
48};
49
50struct ses_component {
51 u64 addr;
52};
53
54static int ses_probe(struct device *dev)
55{
56 struct scsi_device *sdev = to_scsi_device(dev);
57 int err = -ENODEV;
58
59 if (sdev->type != TYPE_ENCLOSURE)
60 goto out;
61
62 err = 0;
63 sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n");
64
65 out:
66 return err;
67}
68
69#define SES_TIMEOUT (30 * HZ)
70#define SES_RETRIES 3
71
72static void init_device_slot_control(unsigned char *dest_desc,
73 struct enclosure_component *ecomp,
74 unsigned char *status)
75{
76 memcpy(dest_desc, status, 4);
77 dest_desc[0] = 0;
78
79 if (ecomp->type == ENCLOSURE_COMPONENT_DEVICE)
80 dest_desc[1] = 0;
81 dest_desc[2] &= 0xde;
82 dest_desc[3] &= 0x3c;
83}
84
85
86static int ses_recv_diag(struct scsi_device *sdev, int page_code,
87 void *buf, int bufflen)
88{
89 int ret;
90 unsigned char cmd[] = {
91 RECEIVE_DIAGNOSTIC,
92 1,
93 page_code,
94 bufflen >> 8,
95 bufflen & 0xff,
96 0
97 };
98 unsigned char recv_page_code;
99
100 ret = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen,
101 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
102 if (unlikely(!ret))
103 return ret;
104
105 recv_page_code = ((unsigned char *)buf)[0];
106
107 if (likely(recv_page_code == page_code))
108 return ret;
109
110
111
112
113 sdev_printk(KERN_ERR, sdev,
114 "Wrong diagnostic page; asked for %d got %u\n",
115 page_code, recv_page_code);
116
117 return -EINVAL;
118}
119
120static int ses_send_diag(struct scsi_device *sdev, int page_code,
121 void *buf, int bufflen)
122{
123 u32 result;
124
125 unsigned char cmd[] = {
126 SEND_DIAGNOSTIC,
127 0x10,
128 0,
129 bufflen >> 8,
130 bufflen & 0xff,
131 0
132 };
133
134 result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen,
135 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
136 if (result)
137 sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n",
138 result);
139 return result;
140}
141
142static int ses_set_page2_descriptor(struct enclosure_device *edev,
143 struct enclosure_component *ecomp,
144 unsigned char *desc)
145{
146 int i, j, count = 0, descriptor = ecomp->number;
147 struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
148 struct ses_device *ses_dev = edev->scratch;
149 unsigned char *type_ptr = ses_dev->page1_types;
150 unsigned char *desc_ptr = ses_dev->page2 + 8;
151
152
153 memset(desc_ptr, 0, ses_dev->page2_len - 8);
154 for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
155 for (j = 0; j < type_ptr[1]; j++) {
156 desc_ptr += 4;
157 if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
158 type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
159 continue;
160 if (count++ == descriptor) {
161 memcpy(desc_ptr, desc, 4);
162
163 desc_ptr[0] |= 0x80;
164
165 desc_ptr[0] &= 0xf0;
166 }
167 }
168 }
169
170 return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
171}
172
173static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
174 struct enclosure_component *ecomp)
175{
176 int i, j, count = 0, descriptor = ecomp->number;
177 struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
178 struct ses_device *ses_dev = edev->scratch;
179 unsigned char *type_ptr = ses_dev->page1_types;
180 unsigned char *desc_ptr = ses_dev->page2 + 8;
181
182 ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
183
184 for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
185 for (j = 0; j < type_ptr[1]; j++) {
186 desc_ptr += 4;
187 if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
188 type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
189 continue;
190 if (count++ == descriptor)
191 return desc_ptr;
192 }
193 }
194 return NULL;
195}
196
197
198
199
200
201static void ses_get_fault(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->fault = (desc[3] & 0x60) >> 4;
209}
210
211static int ses_set_fault(struct enclosure_device *edev,
212 struct enclosure_component *ecomp,
213 enum enclosure_component_setting val)
214{
215 unsigned char desc[4];
216 unsigned char *desc_ptr;
217
218 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
219
220 if (!desc_ptr)
221 return -EIO;
222
223 init_device_slot_control(desc, ecomp, desc_ptr);
224
225 switch (val) {
226 case ENCLOSURE_SETTING_DISABLED:
227 desc[3] &= 0xdf;
228 break;
229 case ENCLOSURE_SETTING_ENABLED:
230 desc[3] |= 0x20;
231 break;
232 default:
233
234 return -EINVAL;
235 }
236
237 return ses_set_page2_descriptor(edev, ecomp, desc);
238}
239
240static void ses_get_status(struct enclosure_device *edev,
241 struct enclosure_component *ecomp)
242{
243 unsigned char *desc;
244
245 desc = ses_get_page2_descriptor(edev, ecomp);
246 if (desc)
247 ecomp->status = (desc[0] & 0x0f);
248}
249
250static void ses_get_locate(struct enclosure_device *edev,
251 struct enclosure_component *ecomp)
252{
253 unsigned char *desc;
254
255 desc = ses_get_page2_descriptor(edev, ecomp);
256 if (desc)
257 ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
258}
259
260static int ses_set_locate(struct enclosure_device *edev,
261 struct enclosure_component *ecomp,
262 enum enclosure_component_setting val)
263{
264 unsigned char desc[4];
265 unsigned char *desc_ptr;
266
267 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
268
269 if (!desc_ptr)
270 return -EIO;
271
272 init_device_slot_control(desc, ecomp, desc_ptr);
273
274 switch (val) {
275 case ENCLOSURE_SETTING_DISABLED:
276 desc[2] &= 0xfd;
277 break;
278 case ENCLOSURE_SETTING_ENABLED:
279 desc[2] |= 0x02;
280 break;
281 default:
282
283 return -EINVAL;
284 }
285 return ses_set_page2_descriptor(edev, ecomp, desc);
286}
287
288static int ses_set_active(struct enclosure_device *edev,
289 struct enclosure_component *ecomp,
290 enum enclosure_component_setting val)
291{
292 unsigned char desc[4];
293 unsigned char *desc_ptr;
294
295 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
296
297 if (!desc_ptr)
298 return -EIO;
299
300 init_device_slot_control(desc, ecomp, desc_ptr);
301
302 switch (val) {
303 case ENCLOSURE_SETTING_DISABLED:
304 desc[2] &= 0x7f;
305 ecomp->active = 0;
306 break;
307 case ENCLOSURE_SETTING_ENABLED:
308 desc[2] |= 0x80;
309 ecomp->active = 1;
310 break;
311 default:
312
313 return -EINVAL;
314 }
315 return ses_set_page2_descriptor(edev, ecomp, desc);
316}
317
318static int ses_show_id(struct enclosure_device *edev, char *buf)
319{
320 struct ses_device *ses_dev = edev->scratch;
321 unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4);
322
323 return sprintf(buf, "%#llx\n", id);
324}
325
326static void ses_get_power_status(struct enclosure_device *edev,
327 struct enclosure_component *ecomp)
328{
329 unsigned char *desc;
330
331 desc = ses_get_page2_descriptor(edev, ecomp);
332 if (desc)
333 ecomp->power_status = (desc[3] & 0x10) ? 0 : 1;
334}
335
336static int ses_set_power_status(struct enclosure_device *edev,
337 struct enclosure_component *ecomp,
338 int val)
339{
340 unsigned char desc[4];
341 unsigned char *desc_ptr;
342
343 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
344
345 if (!desc_ptr)
346 return -EIO;
347
348 init_device_slot_control(desc, ecomp, desc_ptr);
349
350 switch (val) {
351
352 case 0:
353 desc[3] |= 0x10;
354 break;
355 case 1:
356 desc[3] &= 0xef;
357 break;
358 default:
359 return -EINVAL;
360 }
361 ecomp->power_status = val;
362 return ses_set_page2_descriptor(edev, ecomp, desc);
363}
364
365static struct enclosure_component_callbacks ses_enclosure_callbacks = {
366 .get_fault = ses_get_fault,
367 .set_fault = ses_set_fault,
368 .get_status = ses_get_status,
369 .get_locate = ses_get_locate,
370 .set_locate = ses_set_locate,
371 .get_power_status = ses_get_power_status,
372 .set_power_status = ses_set_power_status,
373 .set_active = ses_set_active,
374 .show_id = ses_show_id,
375};
376
377struct ses_host_edev {
378 struct Scsi_Host *shost;
379 struct enclosure_device *edev;
380};
381
382#if 0
383int ses_match_host(struct enclosure_device *edev, void *data)
384{
385 struct ses_host_edev *sed = data;
386 struct scsi_device *sdev;
387
388 if (!scsi_is_sdev_device(edev->edev.parent))
389 return 0;
390
391 sdev = to_scsi_device(edev->edev.parent);
392
393 if (sdev->host != sed->shost)
394 return 0;
395
396 sed->edev = edev;
397 return 1;
398}
399#endif
400
401static void ses_process_descriptor(struct enclosure_component *ecomp,
402 unsigned char *desc)
403{
404 int eip = desc[0] & 0x10;
405 int invalid = desc[0] & 0x80;
406 enum scsi_protocol proto = desc[0] & 0x0f;
407 u64 addr = 0;
408 int slot = -1;
409 struct ses_component *scomp = ecomp->scratch;
410 unsigned char *d;
411
412 if (invalid)
413 return;
414
415 switch (proto) {
416 case SCSI_PROTOCOL_FCP:
417 if (eip) {
418 d = desc + 4;
419 slot = d[3];
420 }
421 break;
422 case SCSI_PROTOCOL_SAS:
423 if (eip) {
424 d = desc + 4;
425 slot = d[3];
426 d = desc + 8;
427 } else
428 d = desc + 4;
429
430 addr = (u64)d[12] << 56 |
431 (u64)d[13] << 48 |
432 (u64)d[14] << 40 |
433 (u64)d[15] << 32 |
434 (u64)d[16] << 24 |
435 (u64)d[17] << 16 |
436 (u64)d[18] << 8 |
437 (u64)d[19];
438 break;
439 default:
440
441 break;
442 }
443 ecomp->slot = slot;
444 scomp->addr = addr;
445}
446
447struct efd {
448 u64 addr;
449 struct device *dev;
450};
451
452static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
453 void *data)
454{
455 struct efd *efd = data;
456 int i;
457 struct ses_component *scomp;
458
459 if (!edev->component[0].scratch)
460 return 0;
461
462 for (i = 0; i < edev->components; i++) {
463 scomp = edev->component[i].scratch;
464 if (scomp->addr != efd->addr)
465 continue;
466
467 if (enclosure_add_device(edev, i, efd->dev) == 0)
468 kobject_uevent(&efd->dev->kobj, KOBJ_CHANGE);
469 return 1;
470 }
471 return 0;
472}
473
474#define INIT_ALLOC_SIZE 32
475
476static void ses_enclosure_data_process(struct enclosure_device *edev,
477 struct scsi_device *sdev,
478 int create)
479{
480 u32 result;
481 unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
482 int i, j, page7_len, len, components;
483 struct ses_device *ses_dev = edev->scratch;
484 int types = ses_dev->page1_num_types;
485 unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
486
487 if (!hdr_buf)
488 goto simple_populate;
489
490
491 if (ses_dev->page10)
492 ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
493
494 result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
495 if (result)
496 goto simple_populate;
497
498 page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
499
500 buf = kzalloc(len + 1, GFP_KERNEL);
501 if (!buf)
502 goto simple_populate;
503 result = ses_recv_diag(sdev, 7, buf, len);
504 if (result) {
505 simple_populate:
506 kfree(buf);
507 buf = NULL;
508 desc_ptr = NULL;
509 len = 0;
510 page7_len = 0;
511 } else {
512 desc_ptr = buf + 8;
513 len = (desc_ptr[2] << 8) + desc_ptr[3];
514
515 desc_ptr += len + 4;
516 }
517 if (ses_dev->page10)
518 addl_desc_ptr = ses_dev->page10 + 8;
519 type_ptr = ses_dev->page1_types;
520 components = 0;
521 for (i = 0; i < types; i++, type_ptr += 4) {
522 for (j = 0; j < type_ptr[1]; j++) {
523 char *name = NULL;
524 struct enclosure_component *ecomp;
525
526 if (desc_ptr) {
527 if (desc_ptr >= buf + page7_len) {
528 desc_ptr = NULL;
529 } else {
530 len = (desc_ptr[2] << 8) + desc_ptr[3];
531 desc_ptr += 4;
532
533
534 desc_ptr[len] = '\0';
535 name = desc_ptr;
536 }
537 }
538 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
539 type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
540
541 if (create)
542 ecomp = enclosure_component_alloc(
543 edev,
544 components++,
545 type_ptr[0],
546 name);
547 else
548 ecomp = &edev->component[components++];
549
550 if (!IS_ERR(ecomp)) {
551 ses_get_power_status(edev, ecomp);
552 if (addl_desc_ptr)
553 ses_process_descriptor(
554 ecomp,
555 addl_desc_ptr);
556 if (create)
557 enclosure_component_register(
558 ecomp);
559 }
560 }
561 if (desc_ptr)
562 desc_ptr += len;
563
564 if (addl_desc_ptr &&
565
566 (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
567 type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE ||
568 type_ptr[0] == ENCLOSURE_COMPONENT_SAS_EXPANDER ||
569
570 type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_TARGET_PORT ||
571 type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_INITIATOR_PORT ||
572 type_ptr[0] == ENCLOSURE_COMPONENT_CONTROLLER_ELECTRONICS))
573 addl_desc_ptr += addl_desc_ptr[1] + 2;
574
575 }
576 }
577 kfree(buf);
578 kfree(hdr_buf);
579}
580
581static void ses_match_to_enclosure(struct enclosure_device *edev,
582 struct scsi_device *sdev)
583{
584 struct efd efd = {
585 .addr = 0,
586 };
587
588 ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
589
590 if (scsi_is_sas_rphy(&sdev->sdev_gendev))
591 efd.addr = sas_get_address(sdev);
592
593 if (efd.addr) {
594 efd.dev = &sdev->sdev_gendev;
595
596 enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
597 }
598}
599
600static int ses_intf_add(struct device *cdev,
601 struct class_interface *intf)
602{
603 struct scsi_device *sdev = to_scsi_device(cdev->parent);
604 struct scsi_device *tmp_sdev;
605 unsigned char *buf = NULL, *hdr_buf, *type_ptr;
606 struct ses_device *ses_dev;
607 u32 result;
608 int i, types, len, components = 0;
609 int err = -ENOMEM;
610 int num_enclosures;
611 struct enclosure_device *edev;
612 struct ses_component *scomp = NULL;
613
614 if (!scsi_device_enclosure(sdev)) {
615
616 struct enclosure_device *prev = NULL;
617
618 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
619 ses_match_to_enclosure(edev, sdev);
620 prev = edev;
621 }
622 return -ENODEV;
623 }
624
625
626 if (sdev->type != TYPE_ENCLOSURE)
627 sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");
628
629 ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
630 hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
631 if (!hdr_buf || !ses_dev)
632 goto err_init_free;
633
634 result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
635 if (result)
636 goto recv_failed;
637
638 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
639 buf = kzalloc(len, GFP_KERNEL);
640 if (!buf)
641 goto err_free;
642
643 result = ses_recv_diag(sdev, 1, buf, len);
644 if (result)
645 goto recv_failed;
646
647 types = 0;
648
649
650
651 num_enclosures = buf[1] + 1;
652
653
654 type_ptr = buf + 8;
655
656 for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) {
657 types += type_ptr[2];
658 type_ptr += type_ptr[3] + 4;
659 }
660
661 ses_dev->page1_types = type_ptr;
662 ses_dev->page1_num_types = types;
663
664 for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) {
665 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
666 type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
667 components += type_ptr[1];
668 }
669 ses_dev->page1 = buf;
670 ses_dev->page1_len = len;
671 buf = NULL;
672
673 result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
674 if (result)
675 goto recv_failed;
676
677 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
678 buf = kzalloc(len, GFP_KERNEL);
679 if (!buf)
680 goto err_free;
681
682
683 result = ses_recv_diag(sdev, 2, buf, len);
684 if (result)
685 goto recv_failed;
686 ses_dev->page2 = buf;
687 ses_dev->page2_len = len;
688 buf = NULL;
689
690
691
692 result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
693 if (!result) {
694
695 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
696 buf = kzalloc(len, GFP_KERNEL);
697 if (!buf)
698 goto err_free;
699
700 result = ses_recv_diag(sdev, 10, buf, len);
701 if (result)
702 goto recv_failed;
703 ses_dev->page10 = buf;
704 ses_dev->page10_len = len;
705 buf = NULL;
706 }
707 scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
708 if (!scomp)
709 goto err_free;
710
711 edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
712 components, &ses_enclosure_callbacks);
713 if (IS_ERR(edev)) {
714 err = PTR_ERR(edev);
715 goto err_free;
716 }
717
718 kfree(hdr_buf);
719
720 edev->scratch = ses_dev;
721 for (i = 0; i < components; i++)
722 edev->component[i].scratch = scomp + i;
723
724 ses_enclosure_data_process(edev, sdev, 1);
725
726
727
728 shost_for_each_device(tmp_sdev, sdev->host) {
729 if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev))
730 continue;
731 ses_match_to_enclosure(edev, tmp_sdev);
732 }
733
734 return 0;
735
736 recv_failed:
737 sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
738 result);
739 err = -ENODEV;
740 err_free:
741 kfree(buf);
742 kfree(scomp);
743 kfree(ses_dev->page10);
744 kfree(ses_dev->page2);
745 kfree(ses_dev->page1);
746 err_init_free:
747 kfree(ses_dev);
748 kfree(hdr_buf);
749 sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
750 return err;
751}
752
753static int ses_remove(struct device *dev)
754{
755 return 0;
756}
757
758static void ses_intf_remove_component(struct scsi_device *sdev)
759{
760 struct enclosure_device *edev, *prev = NULL;
761
762 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
763 prev = edev;
764 if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
765 break;
766 }
767 if (edev)
768 put_device(&edev->edev);
769}
770
771static void ses_intf_remove_enclosure(struct scsi_device *sdev)
772{
773 struct enclosure_device *edev;
774 struct ses_device *ses_dev;
775
776
777 edev = enclosure_find(&sdev->sdev_gendev, NULL);
778 if (!edev)
779 return;
780
781 enclosure_unregister(edev);
782
783 ses_dev = edev->scratch;
784 edev->scratch = NULL;
785
786 kfree(ses_dev->page10);
787 kfree(ses_dev->page1);
788 kfree(ses_dev->page2);
789 kfree(ses_dev);
790
791 kfree(edev->component[0].scratch);
792
793 put_device(&edev->edev);
794}
795
796static void ses_intf_remove(struct device *cdev,
797 struct class_interface *intf)
798{
799 struct scsi_device *sdev = to_scsi_device(cdev->parent);
800
801 if (!scsi_device_enclosure(sdev))
802 ses_intf_remove_component(sdev);
803 else
804 ses_intf_remove_enclosure(sdev);
805}
806
807static struct class_interface ses_interface = {
808 .add_dev = ses_intf_add,
809 .remove_dev = ses_intf_remove,
810};
811
812static struct scsi_driver ses_template = {
813 .gendrv = {
814 .name = "ses",
815 .owner = THIS_MODULE,
816 .probe = ses_probe,
817 .remove = ses_remove,
818 },
819};
820
821static int __init ses_init(void)
822{
823 int err;
824
825 err = scsi_register_interface(&ses_interface);
826 if (err)
827 return err;
828
829 err = scsi_register_driver(&ses_template.gendrv);
830 if (err)
831 goto out_unreg;
832
833 return 0;
834
835 out_unreg:
836 scsi_unregister_interface(&ses_interface);
837 return err;
838}
839
840static void __exit ses_exit(void)
841{
842 scsi_unregister_driver(&ses_template.gendrv);
843 scsi_unregister_interface(&ses_interface);
844}
845
846module_init(ses_init);
847module_exit(ses_exit);
848
849MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);
850
851MODULE_AUTHOR("James Bottomley");
852MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
853MODULE_LICENSE("GPL v2");
854
