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irqchip/s3c24xx: Mark init_eint as __maybe_unused
[linux/fpc-iii.git] / drivers / scsi / ses.c
blob044d06410d4c86c0dc88071bb0de668dd91bb0e2
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 int ret;
88 unsigned char cmd[] = {
89 RECEIVE_DIAGNOSTIC,
90 1, /* Set PCV bit */
91 page_code,
92 bufflen >> 8,
93 bufflen & 0xff,
94 0
95 };
96 unsigned char recv_page_code;
97
98 ret = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen,
99 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
100 if (unlikely(!ret))
101 return ret;
102
103 recv_page_code = ((unsigned char *)buf)[0];
104
105 if (likely(recv_page_code == page_code))
106 return ret;
107
108 /* successful diagnostic but wrong page code. This happens to some
109 * USB devices, just print a message and pretend there was an error */
110
111 sdev_printk(KERN_ERR, sdev,
112 "Wrong diagnostic page; asked for %d got %u\n",
113 page_code, recv_page_code);
114
115 return -EINVAL;
116 }
117
118 static int ses_send_diag(struct scsi_device *sdev, int page_code,
119 void *buf, int bufflen)
120 {
121 u32 result;
122
123 unsigned char cmd[] = {
124 SEND_DIAGNOSTIC,
125 0x10, /* Set PF bit */
126 0,
127 bufflen >> 8,
128 bufflen & 0xff,
129 0
130 };
131
132 result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen,
133 NULL, SES_TIMEOUT, SES_RETRIES, NULL);
134 if (result)
135 sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n",
136 result);
137 return result;
138 }
139
140 static int ses_set_page2_descriptor(struct enclosure_device *edev,
141 struct enclosure_component *ecomp,
142 unsigned char *desc)
143 {
144 int i, j, count = 0, descriptor = ecomp->number;
145 struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
146 struct ses_device *ses_dev = edev->scratch;
147 unsigned char *type_ptr = ses_dev->page1_types;
148 unsigned char *desc_ptr = ses_dev->page2 + 8;
149
150 /* Clear everything */
151 memset(desc_ptr, 0, ses_dev->page2_len - 8);
152 for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
153 for (j = 0; j < type_ptr[1]; j++) {
154 desc_ptr += 4;
155 if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
156 type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
157 continue;
158 if (count++ == descriptor) {
159 memcpy(desc_ptr, desc, 4);
160 /* set select */
161 desc_ptr[0] |= 0x80;
162 /* clear reserved, just in case */
163 desc_ptr[0] &= 0xf0;
164 }
165 }
166 }
167
168 return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
169 }
170
171 static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
172 struct enclosure_component *ecomp)
173 {
174 int i, j, count = 0, descriptor = ecomp->number;
175 struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
176 struct ses_device *ses_dev = edev->scratch;
177 unsigned char *type_ptr = ses_dev->page1_types;
178 unsigned char *desc_ptr = ses_dev->page2 + 8;
179
180 ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
181
182 for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
183 for (j = 0; j < type_ptr[1]; j++) {
184 desc_ptr += 4;
185 if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
186 type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE)
187 continue;
188 if (count++ == descriptor)
189 return desc_ptr;
190 }
191 }
192 return NULL;
193 }
194
195 /* For device slot and array device slot elements, byte 3 bit 6
196 * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this
197 * code stands these bits are shifted 4 positions right so in
198 * sysfs they will appear as bits 2 and 1 respectively. Strange. */
199 static void ses_get_fault(struct enclosure_device *edev,
200 struct enclosure_component *ecomp)
201 {
202 unsigned char *desc;
203
204 desc = ses_get_page2_descriptor(edev, ecomp);
205 if (desc)
206 ecomp->fault = (desc[3] & 0x60) >> 4;
207 }
208
209 static int ses_set_fault(struct enclosure_device *edev,
210 struct enclosure_component *ecomp,
211 enum enclosure_component_setting val)
212 {
213 unsigned char desc[4];
214 unsigned char *desc_ptr;
215
216 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
217
218 if (!desc_ptr)
219 return -EIO;
220
221 init_device_slot_control(desc, ecomp, desc_ptr);
222
223 switch (val) {
224 case ENCLOSURE_SETTING_DISABLED:
225 desc[3] &= 0xdf;
226 break;
227 case ENCLOSURE_SETTING_ENABLED:
228 desc[3] |= 0x20;
229 break;
230 default:
231 /* SES doesn't do the SGPIO blink settings */
232 return -EINVAL;
233 }
234
235 return ses_set_page2_descriptor(edev, ecomp, desc);
236 }
237
238 static void ses_get_status(struct enclosure_device *edev,
239 struct enclosure_component *ecomp)
240 {
241 unsigned char *desc;
242
243 desc = ses_get_page2_descriptor(edev, ecomp);
244 if (desc)
245 ecomp->status = (desc[0] & 0x0f);
246 }
247
248 static void ses_get_locate(struct enclosure_device *edev,
249 struct enclosure_component *ecomp)
250 {
251 unsigned char *desc;
252
253 desc = ses_get_page2_descriptor(edev, ecomp);
254 if (desc)
255 ecomp->locate = (desc[2] & 0x02) ? 1 : 0;
256 }
257
258 static int ses_set_locate(struct enclosure_device *edev,
259 struct enclosure_component *ecomp,
260 enum enclosure_component_setting val)
261 {
262 unsigned char desc[4];
263 unsigned char *desc_ptr;
264
265 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
266
267 if (!desc_ptr)
268 return -EIO;
269
270 init_device_slot_control(desc, ecomp, desc_ptr);
271
272 switch (val) {
273 case ENCLOSURE_SETTING_DISABLED:
274 desc[2] &= 0xfd;
275 break;
276 case ENCLOSURE_SETTING_ENABLED:
277 desc[2] |= 0x02;
278 break;
279 default:
280 /* SES doesn't do the SGPIO blink settings */
281 return -EINVAL;
282 }
283 return ses_set_page2_descriptor(edev, ecomp, desc);
284 }
285
286 static int ses_set_active(struct enclosure_device *edev,
287 struct enclosure_component *ecomp,
288 enum enclosure_component_setting val)
289 {
290 unsigned char desc[4];
291 unsigned char *desc_ptr;
292
293 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
294
295 if (!desc_ptr)
296 return -EIO;
297
298 init_device_slot_control(desc, ecomp, desc_ptr);
299
300 switch (val) {
301 case ENCLOSURE_SETTING_DISABLED:
302 desc[2] &= 0x7f;
303 ecomp->active = 0;
304 break;
305 case ENCLOSURE_SETTING_ENABLED:
306 desc[2] |= 0x80;
307 ecomp->active = 1;
308 break;
309 default:
310 /* SES doesn't do the SGPIO blink settings */
311 return -EINVAL;
312 }
313 return ses_set_page2_descriptor(edev, ecomp, desc);
314 }
315
316 static int ses_show_id(struct enclosure_device *edev, char *buf)
317 {
318 struct ses_device *ses_dev = edev->scratch;
319 unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4);
320
321 return sprintf(buf, "%#llx\n", id);
322 }
323
324 static void ses_get_power_status(struct enclosure_device *edev,
325 struct enclosure_component *ecomp)
326 {
327 unsigned char *desc;
328
329 desc = ses_get_page2_descriptor(edev, ecomp);
330 if (desc)
331 ecomp->power_status = (desc[3] & 0x10) ? 0 : 1;
332 }
333
334 static int ses_set_power_status(struct enclosure_device *edev,
335 struct enclosure_component *ecomp,
336 int val)
337 {
338 unsigned char desc[4];
339 unsigned char *desc_ptr;
340
341 desc_ptr = ses_get_page2_descriptor(edev, ecomp);
342
343 if (!desc_ptr)
344 return -EIO;
345
346 init_device_slot_control(desc, ecomp, desc_ptr);
347
348 switch (val) {
349 /* power = 1 is device_off = 0 and vice versa */
350 case 0:
351 desc[3] |= 0x10;
352 break;
353 case 1:
354 desc[3] &= 0xef;
355 break;
356 default:
357 return -EINVAL;
358 }
359 ecomp->power_status = val;
360 return ses_set_page2_descriptor(edev, ecomp, desc);
361 }
362
363 static struct enclosure_component_callbacks ses_enclosure_callbacks = {
364 .get_fault = ses_get_fault,
365 .set_fault = ses_set_fault,
366 .get_status = ses_get_status,
367 .get_locate = ses_get_locate,
368 .set_locate = ses_set_locate,
369 .get_power_status = ses_get_power_status,
370 .set_power_status = ses_set_power_status,
371 .set_active = ses_set_active,
372 .show_id = ses_show_id,
373 };
374
375 struct ses_host_edev {
376 struct Scsi_Host *shost;
377 struct enclosure_device *edev;
378 };
379
380 #if 0
381 int ses_match_host(struct enclosure_device *edev, void *data)
382 {
383 struct ses_host_edev *sed = data;
384 struct scsi_device *sdev;
385
386 if (!scsi_is_sdev_device(edev->edev.parent))
387 return 0;
388
389 sdev = to_scsi_device(edev->edev.parent);
390
391 if (sdev->host != sed->shost)
392 return 0;
393
394 sed->edev = edev;
395 return 1;
396 }
397 #endif /* 0 */
398
399 static void ses_process_descriptor(struct enclosure_component *ecomp,
400 unsigned char *desc)
401 {
402 int eip = desc[0] & 0x10;
403 int invalid = desc[0] & 0x80;
404 enum scsi_protocol proto = desc[0] & 0x0f;
405 u64 addr = 0;
406 int slot = -1;
407 struct ses_component *scomp = ecomp->scratch;
408 unsigned char *d;
409
410 if (invalid)
411 return;
412
413 switch (proto) {
414 case SCSI_PROTOCOL_FCP:
415 if (eip) {
416 d = desc + 4;
417 slot = d[3];
418 }
419 break;
420 case SCSI_PROTOCOL_SAS:
421 if (eip) {
422 d = desc + 4;
423 slot = d[3];
424 d = desc + 8;
425 } else
426 d = desc + 4;
427 /* only take the phy0 addr */
428 addr = (u64)d[12] << 56 |
429 (u64)d[13] << 48 |
430 (u64)d[14] << 40 |
431 (u64)d[15] << 32 |
432 (u64)d[16] << 24 |
433 (u64)d[17] << 16 |
434 (u64)d[18] << 8 |
435 (u64)d[19];
436 break;
437 default:
438 /* FIXME: Need to add more protocols than just SAS */
439 break;
440 }
441 ecomp->slot = slot;
442 scomp->addr = addr;
443 }
444
445 struct efd {
446 u64 addr;
447 struct device *dev;
448 };
449
450 static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
451 void *data)
452 {
453 struct efd *efd = data;
454 int i;
455 struct ses_component *scomp;
456
457 if (!edev->component[0].scratch)
458 return 0;
459
460 for (i = 0; i < edev->components; i++) {
461 scomp = edev->component[i].scratch;
462 if (scomp->addr != efd->addr)
463 continue;
464
465 if (enclosure_add_device(edev, i, efd->dev) == 0)
466 kobject_uevent(&efd->dev->kobj, KOBJ_CHANGE);
467 return 1;
468 }
469 return 0;
470 }
471
472 #define INIT_ALLOC_SIZE 32
473
474 static void ses_enclosure_data_process(struct enclosure_device *edev,
475 struct scsi_device *sdev,
476 int create)
477 {
478 u32 result;
479 unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
480 int i, j, page7_len, len, components;
481 struct ses_device *ses_dev = edev->scratch;
482 int types = ses_dev->page1_num_types;
483 unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
484
485 if (!hdr_buf)
486 goto simple_populate;
487
488 /* re-read page 10 */
489 if (ses_dev->page10)
490 ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
491 /* Page 7 for the descriptors is optional */
492 result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
493 if (result)
494 goto simple_populate;
495
496 page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
497 /* add 1 for trailing '\0' we'll use */
498 buf = kzalloc(len + 1, GFP_KERNEL);
499 if (!buf)
500 goto simple_populate;
501 result = ses_recv_diag(sdev, 7, buf, len);
502 if (result) {
503 simple_populate:
504 kfree(buf);
505 buf = NULL;
506 desc_ptr = NULL;
507 len = 0;
508 page7_len = 0;
509 } else {
510 desc_ptr = buf + 8;
511 len = (desc_ptr[2] << 8) + desc_ptr[3];
512 /* skip past overall descriptor */
513 desc_ptr += len + 4;
514 }
515 if (ses_dev->page10)
516 addl_desc_ptr = ses_dev->page10 + 8;
517 type_ptr = ses_dev->page1_types;
518 components = 0;
519 for (i = 0; i < types; i++, type_ptr += 4) {
520 for (j = 0; j < type_ptr[1]; j++) {
521 char *name = NULL;
522 struct enclosure_component *ecomp;
523
524 if (desc_ptr) {
525 if (desc_ptr >= buf + page7_len) {
526 desc_ptr = NULL;
527 } else {
528 len = (desc_ptr[2] << 8) + desc_ptr[3];
529 desc_ptr += 4;
530 /* Add trailing zero - pushes into
531 * reserved space */
532 desc_ptr[len] = '\0';
533 name = desc_ptr;
534 }
535 }
536 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
537 type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
538
539 if (create)
540 ecomp = enclosure_component_alloc(
541 edev,
542 components++,
543 type_ptr[0],
544 name);
545 else
546 ecomp = &edev->component[components++];
547
548 if (!IS_ERR(ecomp)) {
549 ses_get_power_status(edev, ecomp);
550 if (addl_desc_ptr)
551 ses_process_descriptor(
552 ecomp,
553 addl_desc_ptr);
554 if (create)
555 enclosure_component_register(
556 ecomp);
557 }
558 }
559 if (desc_ptr)
560 desc_ptr += len;
561
562 if (addl_desc_ptr &&
563 /* only find additional descriptions for specific devices */
564 (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
565 type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE ||
566 type_ptr[0] == ENCLOSURE_COMPONENT_SAS_EXPANDER ||
567 /* these elements are optional */
568 type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_TARGET_PORT ||
569 type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_INITIATOR_PORT ||
570 type_ptr[0] == ENCLOSURE_COMPONENT_CONTROLLER_ELECTRONICS))
571 addl_desc_ptr += addl_desc_ptr[1] + 2;
572
573 }
574 }
575 kfree(buf);
576 kfree(hdr_buf);
577 }
578
579 static void ses_match_to_enclosure(struct enclosure_device *edev,
580 struct scsi_device *sdev)
581 {
582 unsigned char *desc;
583 struct efd efd = {
584 .addr = 0,
585 };
586
587 ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
588
589 if (!sdev->vpd_pg83_len)
590 return;
591
592 desc = sdev->vpd_pg83 + 4;
593 while (desc < sdev->vpd_pg83 + sdev->vpd_pg83_len) {
594 enum scsi_protocol proto = desc[0] >> 4;
595 u8 code_set = desc[0] & 0x0f;
596 u8 piv = desc[1] & 0x80;
597 u8 assoc = (desc[1] & 0x30) >> 4;
598 u8 type = desc[1] & 0x0f;
599 u8 len = desc[3];
600
601 if (piv && code_set == 1 && assoc == 1
602 && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
603 efd.addr = get_unaligned_be64(&desc[4]);
604
605 desc += len + 4;
606 }
607 if (efd.addr) {
608 efd.dev = &sdev->sdev_gendev;
609
610 enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
611 }
612 }
613
614 static int ses_intf_add(struct device *cdev,
615 struct class_interface *intf)
616 {
617 struct scsi_device *sdev = to_scsi_device(cdev->parent);
618 struct scsi_device *tmp_sdev;
619 unsigned char *buf = NULL, *hdr_buf, *type_ptr;
620 struct ses_device *ses_dev;
621 u32 result;
622 int i, types, len, components = 0;
623 int err = -ENOMEM;
624 int num_enclosures;
625 struct enclosure_device *edev;
626 struct ses_component *scomp = NULL;
627
628 if (!scsi_device_enclosure(sdev)) {
629 /* not an enclosure, but might be in one */
630 struct enclosure_device *prev = NULL;
631
632 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
633 ses_match_to_enclosure(edev, sdev);
634 prev = edev;
635 }
636 return -ENODEV;
637 }
638
639 /* TYPE_ENCLOSURE prints a message in probe */
640 if (sdev->type != TYPE_ENCLOSURE)
641 sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n");
642
643 ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL);
644 hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
645 if (!hdr_buf || !ses_dev)
646 goto err_init_free;
647
648 result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE);
649 if (result)
650 goto recv_failed;
651
652 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
653 buf = kzalloc(len, GFP_KERNEL);
654 if (!buf)
655 goto err_free;
656
657 result = ses_recv_diag(sdev, 1, buf, len);
658 if (result)
659 goto recv_failed;
660
661 types = 0;
662
663 /* we always have one main enclosure and the rest are referred
664 * to as secondary subenclosures */
665 num_enclosures = buf[1] + 1;
666
667 /* begin at the enclosure descriptor */
668 type_ptr = buf + 8;
669 /* skip all the enclosure descriptors */
670 for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) {
671 types += type_ptr[2];
672 type_ptr += type_ptr[3] + 4;
673 }
674
675 ses_dev->page1_types = type_ptr;
676 ses_dev->page1_num_types = types;
677
678 for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) {
679 if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
680 type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
681 components += type_ptr[1];
682 }
683 ses_dev->page1 = buf;
684 ses_dev->page1_len = len;
685 buf = NULL;
686
687 result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE);
688 if (result)
689 goto recv_failed;
690
691 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
692 buf = kzalloc(len, GFP_KERNEL);
693 if (!buf)
694 goto err_free;
695
696 /* make sure getting page 2 actually works */
697 result = ses_recv_diag(sdev, 2, buf, len);
698 if (result)
699 goto recv_failed;
700 ses_dev->page2 = buf;
701 ses_dev->page2_len = len;
702 buf = NULL;
703
704 /* The additional information page --- allows us
705 * to match up the devices */
706 result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE);
707 if (!result) {
708
709 len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
710 buf = kzalloc(len, GFP_KERNEL);
711 if (!buf)
712 goto err_free;
713
714 result = ses_recv_diag(sdev, 10, buf, len);
715 if (result)
716 goto recv_failed;
717 ses_dev->page10 = buf;
718 ses_dev->page10_len = len;
719 buf = NULL;
720 }
721 scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
722 if (!scomp)
723 goto err_free;
724
725 edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
726 components, &ses_enclosure_callbacks);
727 if (IS_ERR(edev)) {
728 err = PTR_ERR(edev);
729 goto err_free;
730 }
731
732 kfree(hdr_buf);
733
734 edev->scratch = ses_dev;
735 for (i = 0; i < components; i++)
736 edev->component[i].scratch = scomp + i;
737
738 ses_enclosure_data_process(edev, sdev, 1);
739
740 /* see if there are any devices matching before
741 * we found the enclosure */
742 shost_for_each_device(tmp_sdev, sdev->host) {
743 if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev))
744 continue;
745 ses_match_to_enclosure(edev, tmp_sdev);
746 }
747
748 return 0;
749
750 recv_failed:
751 sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n",
752 result);
753 err = -ENODEV;
754 err_free:
755 kfree(buf);
756 kfree(scomp);
757 kfree(ses_dev->page10);
758 kfree(ses_dev->page2);
759 kfree(ses_dev->page1);
760 err_init_free:
761 kfree(ses_dev);
762 kfree(hdr_buf);
763 sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err);
764 return err;
765 }
766
767 static int ses_remove(struct device *dev)
768 {
769 return 0;
770 }
771
772 static void ses_intf_remove_component(struct scsi_device *sdev)
773 {
774 struct enclosure_device *edev, *prev = NULL;
775
776 while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
777 prev = edev;
778 if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
779 break;
780 }
781 if (edev)
782 put_device(&edev->edev);
783 }
784
785 static void ses_intf_remove_enclosure(struct scsi_device *sdev)
786 {
787 struct enclosure_device *edev;
788 struct ses_device *ses_dev;
789
790 /* exact match to this enclosure */
791 edev = enclosure_find(&sdev->sdev_gendev, NULL);
792 if (!edev)
793 return;
794
795 ses_dev = edev->scratch;
796 edev->scratch = NULL;
797
798 kfree(ses_dev->page10);
799 kfree(ses_dev->page1);
800 kfree(ses_dev->page2);
801 kfree(ses_dev);
802
803 kfree(edev->component[0].scratch);
804
805 put_device(&edev->edev);
806 enclosure_unregister(edev);
807 }
808
809 static void ses_intf_remove(struct device *cdev,
810 struct class_interface *intf)
811 {
812 struct scsi_device *sdev = to_scsi_device(cdev->parent);
813
814 if (!scsi_device_enclosure(sdev))
815 ses_intf_remove_component(sdev);
816 else
817 ses_intf_remove_enclosure(sdev);
818 }
819
820 static struct class_interface ses_interface = {
821 .add_dev = ses_intf_add,
822 .remove_dev = ses_intf_remove,
823 };
824
825 static struct scsi_driver ses_template = {
826 .gendrv = {
827 .name = "ses",
828 .owner = THIS_MODULE,
829 .probe = ses_probe,
830 .remove = ses_remove,
831 },
832 };
833
834 static int __init ses_init(void)
835 {
836 int err;
837
838 err = scsi_register_interface(&ses_interface);
839 if (err)
840 return err;
841
842 err = scsi_register_driver(&ses_template.gendrv);
843 if (err)
844 goto out_unreg;
845
846 return 0;
847
848 out_unreg:
849 scsi_unregister_interface(&ses_interface);
850 return err;
851 }
852
853 static void __exit ses_exit(void)
854 {
855 scsi_unregister_driver(&ses_template.gendrv);
856 scsi_unregister_interface(&ses_interface);
857 }
858
859 module_init(ses_init);
860 module_exit(ses_exit);
861
862 MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE);
863
864 MODULE_AUTHOR("James Bottomley");
865 MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver");
866 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support