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ocfs2: fix several issues of append dio
[linux/fpc-iii.git] / drivers / scsi / ses.c
blobdcb0d76d7312847d37809df1f5763206567d5daf
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/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 struct ses_device {
38 unsigned char *page1;
39 unsigned char *page1_types;
40 unsigned char *page2;
41 unsigned char *page10;
42 short page1_len;
43 short page1_num_types;
44 short page2_len;
45 short page10_len;
46 };
47
48 struct ses_component {
49 u64 addr;
50 };
51
52 static int ses_probe(struct device *dev)
53 {
54 struct scsi_device *sdev = to_scsi_device(dev);
55 int err = -ENODEV;
56
57 if (sdev->type != TYPE_ENCLOSURE)
58 goto out;
59
60 err = 0;
61 sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n");
62
63 out:
64 return err;
65 }
66
67 #define SES_TIMEOUT (30 * HZ)
68 #define SES_RETRIES 3
69
70 static void init_device_slot_control(unsigned char *dest_desc,
71 struct enclosure_component *ecomp,
72 unsigned char *status)
73 {
74 memcpy(dest_desc, status, 4);
75 dest_desc[0] = 0;
76 /* only clear byte 1 for ENCLOSURE_COMPONENT_DEVICE */
77 if (ecomp->type == ENCLOSURE_COMPONENT_DEVICE)
78 dest_desc[1] = 0;
79 dest_desc[2] &= 0xde;
80 dest_desc[3] &= 0x3c;
81 }
82
83
84 static int ses_recv_diag(struct scsi_device *sdev, int page_code,
85 void *buf, int bufflen)
86 {
87 unsigned char cmd[] = {
88 RECEIVE_DIAGNOSTIC,
89 1, /* Set PCV bit */
90 page_code,
91 bufflen >> 8,
92 bufflen & 0xff,
93 0
94 };
95
96 return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen,
97 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
98 }
99
100 static int ses_send_diag(struct scsi_device *sdev, int page_code,
101 void *buf, int bufflen)
102 {
103 u32 result;
104
105 unsigned char cmd[] = {
106 SEND_DIAGNOSTIC,
107 0x10, /* Set PF bit */
108 0,
109 bufflen >> 8,
110 bufflen & 0xff,
111 0
112 };
113
114 result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen,
115 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
116 if (result)
117 sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n",
118 result);
119 return result;
120 }
121
122 static int ses_set_page2_descriptor(struct enclosure_device *edev,
123 struct enclosure_component *ecomp,
124 unsigned char *desc)
125 {
126 int i, j, count = 0, descriptor = ecomp->number;
127 struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
128 struct ses_device *ses_dev = edev->scratch;
129 unsigned char *type_ptr = ses_dev->page1_types;
130 unsigned char *desc_ptr = ses_dev->page2 + 8;
131
132 /* Clear everything */
133 memset(desc_ptr, 0, ses_dev->page2_len - 8);
134 for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
135 for (j = 0; j < type_ptr[1]; j++) {
136 desc_ptr += 4;
137 if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
138 type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
139 continue;
140 if (count++ == descriptor) {
141 memcpy(desc_ptr, desc, 4);
142 /* set select */
143 desc_ptr[0] |= 0x80;
144 /* clear reserved, just in case */
145 desc_ptr[0] &= 0xf0;
146 }
147 }
148 }
149
150 return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
151 }
152
153 static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
154 struct enclosure_component *ecomp)
155 {
156 int i, j, count = 0, descriptor = ecomp->number;
157 struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
158 struct ses_device *ses_dev = edev->scratch;
159 unsigned char *type_ptr = ses_dev->page1_types;
160 unsigned char *desc_ptr = ses_dev->page2 + 8;
161
162 ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
163
164 for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
165 for (j = 0; j < type_ptr[1]; j++) {
166 desc_ptr += 4;
167 if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
168 type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
169 continue;
170 if (count++ == descriptor)
171 return desc_ptr;
172 }
173 }
174 return NULL;
175 }
176
177 /* For device slot and array device slot elements, byte 3 bit 6
178 * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this
179 * code stands these bits are shifted 4 positions right so in
180 * sysfs they will appear as bits 2 and 1 respectively. Strange. */
181 static void ses_get_fault(struct enclosure_device *edev,
182 struct enclosure_component *ecomp)
183 {
184 unsigned char *desc;
185
186 desc = ses_get_page2_descriptor(edev, ecomp);
187 if (desc)
188 ecomp->fault = (desc[3] & 0x60) >> 4;
189 }
190
191 static int ses_set_fault(struct enclosure_device *edev,
192 struct enclosure_component *ecomp,
193 enum enclosure_component_setting val)
194 {
195 unsigned char desc[4];
196 unsigned char *desc_ptr;
197
198 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
199
200 if (!desc_ptr)
201 return -EIO;
202
203 init_device_slot_control(desc, ecomp, desc_ptr);
204
205 switch (val) {
206 case ENCLOSURE_SETTING_DISABLED:
207 desc[3] &= 0xdf;
208 break;
209 case ENCLOSURE_SETTING_ENABLED:
210 desc[3] |= 0x20;
211 break;
212 default:
213 /* SES doesn't do the SGPIO blink settings */
214 return -EINVAL;
215 }
216
217 return ses_set_page2_descriptor(edev, ecomp, desc);
218 }
219
220 static void ses_get_status(struct enclosure_device *edev,
221 struct enclosure_component *ecomp)
222 {
223 unsigned char *desc;
224
225 desc = ses_get_page2_descriptor(edev, ecomp);
226 if (desc)
227 ecomp->status = (desc[0] & 0x0f);
228 }
229
230 static void ses_get_locate(struct enclosure_device *edev,
231 struct enclosure_component *ecomp)
232 {
233 unsigned char *desc;
234
235 desc = ses_get_page2_descriptor(edev, ecomp);
236 if (desc)
237 ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
238 }
239
240 static int ses_set_locate(struct enclosure_device *edev,
241 struct enclosure_component *ecomp,
242 enum enclosure_component_setting val)
243 {
244 unsigned char desc[4];
245 unsigned char *desc_ptr;
246
247 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
248
249 if (!desc_ptr)
250 return -EIO;
251
252 init_device_slot_control(desc, ecomp, desc_ptr);
253
254 switch (val) {
255 case ENCLOSURE_SETTING_DISABLED:
256 desc[2] &= 0xfd;
257 break;
258 case ENCLOSURE_SETTING_ENABLED:
259 desc[2] |= 0x02;
260 break;
261 default:
262 /* SES doesn't do the SGPIO blink settings */
263 return -EINVAL;
264 }
265 return ses_set_page2_descriptor(edev, ecomp, desc);
266 }
267
268 static int ses_set_active(struct enclosure_device *edev,
269 struct enclosure_component *ecomp,
270 enum enclosure_component_setting val)
271 {
272 unsigned char desc[4];
273 unsigned char *desc_ptr;
274
275 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
276
277 if (!desc_ptr)
278 return -EIO;
279
280 init_device_slot_control(desc, ecomp, desc_ptr);
281
282 switch (val) {
283 case ENCLOSURE_SETTING_DISABLED:
284 desc[2] &= 0x7f;
285 ecomp->active = 0;
286 break;
287 case ENCLOSURE_SETTING_ENABLED:
288 desc[2] |= 0x80;
289 ecomp->active = 1;
290 break;
291 default:
292 /* SES doesn't do the SGPIO blink settings */
293 return -EINVAL;
294 }
295 return ses_set_page2_descriptor(edev, ecomp, desc);
296 }
297
298 static int ses_show_id(struct enclosure_device *edev, char *buf)
299 {
300 struct ses_device *ses_dev = edev->scratch;
301 unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4);
302
303 return sprintf(buf, "%#llx\n", id);
304 }
305
306 static void ses_get_power_status(struct enclosure_device *edev,
307 struct enclosure_component *ecomp)
308 {
309 unsigned char *desc;
310
311 desc = ses_get_page2_descriptor(edev, ecomp);
312 if (desc)
313 ecomp->power_status = (desc[3] & 0x10) ? 0 : 1;
314 }
315
316 static int ses_set_power_status(struct enclosure_device *edev,
317 struct enclosure_component *ecomp,
318 int val)
319 {
320 unsigned char desc[4];
321 unsigned char *desc_ptr;
322
323 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
324
325 if (!desc_ptr)
326 return -EIO;
327
328 init_device_slot_control(desc, ecomp, desc_ptr);
329
330 switch (val) {
331 /* power = 1 is device_off = 0 and vice versa */
332 case 0:
333 desc[3] |= 0x10;
334 break;
335 case 1:
336 desc[3] &= 0xef;
337 break;
338 default:
339 return -EINVAL;
340 }
341 ecomp->power_status = val;
342 return ses_set_page2_descriptor(edev, ecomp, desc);
343 }
344
345 static struct enclosure_component_callbacks ses_enclosure_callbacks = {
346 .get_fault = ses_get_fault,
347 .set_fault = ses_set_fault,
348 .get_status = ses_get_status,
349 .get_locate = ses_get_locate,
350 .set_locate = ses_set_locate,
351 .get_power_status = ses_get_power_status,
352 .set_power_status = ses_set_power_status,
353 .set_active = ses_set_active,
354 .show_id = ses_show_id,
355 };
356
357 struct ses_host_edev {
358 struct Scsi_Host *shost;
359 struct enclosure_device *edev;
360 };
361
362 #if 0
363 int ses_match_host(struct enclosure_device *edev, void *data)
364 {
365 struct ses_host_edev *sed = data;
366 struct scsi_device *sdev;
367
368 if (!scsi_is_sdev_device(edev->edev.parent))
369 return 0;
370
371 sdev = to_scsi_device(edev->edev.parent);
372
373 if (sdev->host != sed->shost)
374 return 0;
375
376 sed->edev = edev;
377 return 1;
378 }
379 #endif /* 0 */
380
381 static void ses_process_descriptor(struct enclosure_component *ecomp,
382 unsigned char *desc)
383 {
384 int eip = desc[0] & 0x10;
385 int invalid = desc[0] & 0x80;
386 enum scsi_protocol proto = desc[0] & 0x0f;
387 u64 addr = 0;
388 int slot = -1;
389 struct ses_component *scomp = ecomp->scratch;
390 unsigned char *d;
391
392 if (invalid)
393 return;
394
395 switch (proto) {
396 case SCSI_PROTOCOL_FCP:
397 if (eip) {
398 d = desc + 4;
399 slot = d[3];
400 }
401 break;
402 case SCSI_PROTOCOL_SAS:
403 if (eip) {
404 d = desc + 4;
405 slot = d[3];
406 d = desc + 8;
407 } else
408 d = desc + 4;
409 /* only take the phy0 addr */
410 addr = (u64)d[12] << 56 |
411 (u64)d[13] << 48 |
412 (u64)d[14] << 40 |
413 (u64)d[15] << 32 |
414 (u64)d[16] << 24 |
415 (u64)d[17] << 16 |
416 (u64)d[18] << 8 |
417 (u64)d[19];
418 break;
419 default:
420 /* FIXME: Need to add more protocols than just SAS */
421 break;
422 }
423 ecomp->slot = slot;
424 scomp->addr = addr;
425 }
426
427 struct efd {
428 u64 addr;
429 struct device *dev;
430 };
431
432 static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
433 void *data)
434 {
435 struct efd *efd = data;
436 int i;
437 struct ses_component *scomp;
438
439 if (!edev->component[0].scratch)
440 return 0;
441
442 for (i = 0; i < edev->components; i++) {
443 scomp = edev->component[i].scratch;
444 if (scomp->addr != efd->addr)
445 continue;
446
447 if (enclosure_add_device(edev, i, efd->dev) == 0)
448 kobject_uevent(&efd->dev->kobj, KOBJ_CHANGE);
449 return 1;
450 }
451 return 0;
452 }
453
454 #define INIT_ALLOC_SIZE 32
455
456 static void ses_enclosure_data_process(struct enclosure_device *edev,
457 struct scsi_device *sdev,
458 int create)
459 {
460 u32 result;
461 unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
462 int i, j, page7_len, len, components;
463 struct ses_device *ses_dev = edev->scratch;
464 int types = ses_dev->page1_num_types;
465 unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
466
467 if (!hdr_buf)
468 goto simple_populate;
469
470 /* re-read page 10 */
471 if (ses_dev->page10)
472 ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
473 /* Page 7 for the descriptors is optional */
474 result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
475 if (result)
476 goto simple_populate;
477
478 page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
479 /* add 1 for trailing '\0' we'll use */
480 buf = kzalloc(len + 1, GFP_KERNEL);
481 if (!buf)
482 goto simple_populate;
483 result = ses_recv_diag(sdev, 7, buf, len);
484 if (result) {
485 simple_populate:
486 kfree(buf);
487 buf = NULL;
488 desc_ptr = NULL;
489 len = 0;
490 page7_len = 0;
491 } else {
492 desc_ptr = buf + 8;
493 len = (desc_ptr[2] << 8) + desc_ptr[3];
494 /* skip past overall descriptor */
495 desc_ptr += len + 4;
496 }
497 if (ses_dev->page10)
498 addl_desc_ptr = ses_dev->page10 + 8;
499 type_ptr = ses_dev->page1_types;
500 components = 0;
501 for (i = 0; i < types; i++, type_ptr += 4) {
502 for (j = 0; j < type_ptr[1]; j++) {
503 char *name = NULL;
504 struct enclosure_component *ecomp;
505
506 if (desc_ptr) {
507 if (desc_ptr >= buf + page7_len) {
508 desc_ptr = NULL;
509 } else {
510 len = (desc_ptr[2] << 8) + desc_ptr[3];
511 desc_ptr += 4;
512 /* Add trailing zero - pushes into
513 * reserved space */
514 desc_ptr[len] = '\0';
515 name = desc_ptr;
516 }
517 }
518 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
519 type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
520
521 if (create)
522 ecomp = enclosure_component_alloc(
523 edev,
524 components++,
525 type_ptr[0],
526 name);
527 else
528 ecomp = &edev->component[components++];
529
530 if (!IS_ERR(ecomp)) {
531 ses_get_power_status(edev, ecomp);
532 if (addl_desc_ptr)
533 ses_process_descriptor(
534 ecomp,
535 addl_desc_ptr);
536 if (create)
537 enclosure_component_register(
538 ecomp);
539 }
540 }
541 if (desc_ptr)
542 desc_ptr += len;
543
544 if (addl_desc_ptr)
545 addl_desc_ptr += addl_desc_ptr[1] + 2;
546
547 }
548 }
549 kfree(buf);
550 kfree(hdr_buf);
551 }
552
553 static void ses_match_to_enclosure(struct enclosure_device *edev,
554 struct scsi_device *sdev)
555 {
556 unsigned char *desc;
557 struct efd efd = {
558 .addr = 0,
559 };
560
561 ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
562
563 if (!sdev->vpd_pg83_len)
564 return;
565
566 desc = sdev->vpd_pg83 + 4;
567 while (desc < sdev->vpd_pg83 + sdev->vpd_pg83_len) {
568 enum scsi_protocol proto = desc[0] >> 4;
569 u8 code_set = desc[0] & 0x0f;
570 u8 piv = desc[1] & 0x80;
571 u8 assoc = (desc[1] & 0x30) >> 4;
572 u8 type = desc[1] & 0x0f;
573 u8 len = desc[3];
574
575 if (piv && code_set == 1 && assoc == 1
576 && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
577 efd.addr = get_unaligned_be64(&desc[4]);
578
579 desc += len + 4;
580 }
581 if (efd.addr) {
582 efd.dev = &sdev->sdev_gendev;
583
584 enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
585 }
586 }
587
588 static int ses_intf_add(struct device *cdev,
589 struct class_interface *intf)
590 {
591 struct scsi_device *sdev = to_scsi_device(cdev->parent);
592 struct scsi_device *tmp_sdev;
593 unsigned char *buf = NULL, *hdr_buf, *type_ptr;
594 struct ses_device *ses_dev;
595 u32 result;
596 int i, types, len, components = 0;
597 int err = -ENOMEM;
598 int num_enclosures;
599 struct enclosure_device *edev;
600 struct ses_component *scomp = NULL;
601
602 if (!scsi_device_enclosure(sdev)) {
603 /* not an enclosure, but might be in one */
604 struct enclosure_device *prev = NULL;
605
606 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
607 ses_match_to_enclosure(edev, sdev);
608 prev = edev;
609 }
610 return -ENODEV;
611 }
612
613 /* TYPE_ENCLOSURE prints a message in probe */
614 if (sdev->type != TYPE_ENCLOSURE)
615 sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");
616
617 ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
618 hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
619 if (!hdr_buf || !ses_dev)
620 goto err_init_free;
621
622 result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
623 if (result)
624 goto recv_failed;
625
626 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
627 buf = kzalloc(len, GFP_KERNEL);
628 if (!buf)
629 goto err_free;
630
631 result = ses_recv_diag(sdev, 1, buf, len);
632 if (result)
633 goto recv_failed;
634
635 types = 0;
636
637 /* we always have one main enclosure and the rest are referred
638 * to as secondary subenclosures */
639 num_enclosures = buf[1] + 1;
640
641 /* begin at the enclosure descriptor */
642 type_ptr = buf + 8;
643 /* skip all the enclosure descriptors */
644 for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) {
645 types += type_ptr[2];
646 type_ptr += type_ptr[3] + 4;
647 }
648
649 ses_dev->page1_types = type_ptr;
650 ses_dev->page1_num_types = types;
651
652 for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) {
653 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
654 type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
655 components += type_ptr[1];
656 }
657 ses_dev->page1 = buf;
658 ses_dev->page1_len = len;
659 buf = NULL;
660
661 result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
662 if (result)
663 goto recv_failed;
664
665 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
666 buf = kzalloc(len, GFP_KERNEL);
667 if (!buf)
668 goto err_free;
669
670 /* make sure getting page 2 actually works */
671 result = ses_recv_diag(sdev, 2, buf, len);
672 if (result)
673 goto recv_failed;
674 ses_dev->page2 = buf;
675 ses_dev->page2_len = len;
676 buf = NULL;
677
678 /* The additional information page --- allows us
679 * to match up the devices */
680 result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
681 if (!result) {
682
683 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
684 buf = kzalloc(len, GFP_KERNEL);
685 if (!buf)
686 goto err_free;
687
688 result = ses_recv_diag(sdev, 10, buf, len);
689 if (result)
690 goto recv_failed;
691 ses_dev->page10 = buf;
692 ses_dev->page10_len = len;
693 buf = NULL;
694 }
695 scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
696 if (!scomp)
697 goto err_free;
698
699 edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
700 components, &ses_enclosure_callbacks);
701 if (IS_ERR(edev)) {
702 err = PTR_ERR(edev);
703 goto err_free;
704 }
705
706 kfree(hdr_buf);
707
708 edev->scratch = ses_dev;
709 for (i = 0; i < components; i++)
710 edev->component[i].scratch = scomp + i;
711
712 ses_enclosure_data_process(edev, sdev, 1);
713
714 /* see if there are any devices matching before
715 * we found the enclosure */
716 shost_for_each_device(tmp_sdev, sdev->host) {
717 if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev))
718 continue;
719 ses_match_to_enclosure(edev, tmp_sdev);
720 }
721
722 return 0;
723
724 recv_failed:
725 sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
726 result);
727 err = -ENODEV;
728 err_free:
729 kfree(buf);
730 kfree(scomp);
731 kfree(ses_dev->page10);
732 kfree(ses_dev->page2);
733 kfree(ses_dev->page1);
734 err_init_free:
735 kfree(ses_dev);
736 kfree(hdr_buf);
737 sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
738 return err;
739 }
740
741 static int ses_remove(struct device *dev)
742 {
743 return 0;
744 }
745
746 static void ses_intf_remove_component(struct scsi_device *sdev)
747 {
748 struct enclosure_device *edev, *prev = NULL;
749
750 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
751 prev = edev;
752 if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
753 break;
754 }
755 if (edev)
756 put_device(&edev->edev);
757 }
758
759 static void ses_intf_remove_enclosure(struct scsi_device *sdev)
760 {
761 struct enclosure_device *edev;
762 struct ses_device *ses_dev;
763
764 /* exact match to this enclosure */
765 edev = enclosure_find(&sdev->sdev_gendev, NULL);
766 if (!edev)
767 return;
768
769 ses_dev = edev->scratch;
770 edev->scratch = NULL;
771
772 kfree(ses_dev->page10);
773 kfree(ses_dev->page1);
774 kfree(ses_dev->page2);
775 kfree(ses_dev);
776
777 kfree(edev->component[0].scratch);
778
779 put_device(&edev->edev);
780 enclosure_unregister(edev);
781 }
782
783 static void ses_intf_remove(struct device *cdev,
784 struct class_interface *intf)
785 {
786 struct scsi_device *sdev = to_scsi_device(cdev->parent);
787
788 if (!scsi_device_enclosure(sdev))
789 ses_intf_remove_component(sdev);
790 else
791 ses_intf_remove_enclosure(sdev);
792 }
793
794 static struct class_interface ses_interface = {
795 .add_dev = ses_intf_add,
796 .remove_dev = ses_intf_remove,
797 };
798
799 static struct scsi_driver ses_template = {
800 .gendrv = {
801 .name = "ses",
802 .owner = THIS_MODULE,
803 .probe = ses_probe,
804 .remove = ses_remove,
805 },
806 };
807
808 static int __init ses_init(void)
809 {
810 int err;
811
812 err = scsi_register_interface(&ses_interface);
813 if (err)
814 return err;
815
816 err = scsi_register_driver(&ses_template.gendrv);
817 if (err)
818 goto out_unreg;
819
820 return 0;
821
822 out_unreg:
823 scsi_unregister_interface(&ses_interface);
824 return err;
825 }
826
827 static void __exit ses_exit(void)
828 {
829 scsi_unregister_driver(&ses_template.gendrv);
830 scsi_unregister_interface(&ses_interface);
831 }
832
833 module_init(ses_init);
834 module_exit(ses_exit);
835
836 MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);
837
838 MODULE_AUTHOR("James Bottomley");
839 MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
840 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support