Root/
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 | |
29 | #include <scsi/scsi.h> |
30 | #include <scsi/scsi_cmnd.h> |
31 | #include <scsi/scsi_dbg.h> |
32 | #include <scsi/scsi_device.h> |
33 | #include <scsi/scsi_driver.h> |
34 | #include <scsi/scsi_host.h> |
35 | |
36 | struct ses_device { |
37 | unsigned char *page1; |
38 | unsigned char *page1_types; |
39 | unsigned char *page2; |
40 | unsigned char *page10; |
41 | short page1_len; |
42 | short page1_num_types; |
43 | short page2_len; |
44 | short page10_len; |
45 | }; |
46 | |
47 | struct ses_component { |
48 | u64 addr; |
49 | unsigned char *desc; |
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 int ses_recv_diag(struct scsi_device *sdev, int page_code, |
71 | void *buf, int bufflen) |
72 | { |
73 | unsigned char cmd[] = { |
74 | RECEIVE_DIAGNOSTIC, |
75 | 1, /* Set PCV bit */ |
76 | page_code, |
77 | bufflen >> 8, |
78 | bufflen & 0xff, |
79 | 0 |
80 | }; |
81 | |
82 | return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen, |
83 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
84 | } |
85 | |
86 | static int ses_send_diag(struct scsi_device *sdev, int page_code, |
87 | void *buf, int bufflen) |
88 | { |
89 | u32 result; |
90 | |
91 | unsigned char cmd[] = { |
92 | SEND_DIAGNOSTIC, |
93 | 0x10, /* Set PF bit */ |
94 | 0, |
95 | bufflen >> 8, |
96 | bufflen & 0xff, |
97 | 0 |
98 | }; |
99 | |
100 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen, |
101 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
102 | if (result) |
103 | sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n", |
104 | result); |
105 | return result; |
106 | } |
107 | |
108 | static int ses_set_page2_descriptor(struct enclosure_device *edev, |
109 | struct enclosure_component *ecomp, |
110 | unsigned char *desc) |
111 | { |
112 | int i, j, count = 0, descriptor = ecomp->number; |
113 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
114 | struct ses_device *ses_dev = edev->scratch; |
115 | unsigned char *type_ptr = ses_dev->page1_types; |
116 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
117 | |
118 | /* Clear everything */ |
119 | memset(desc_ptr, 0, ses_dev->page2_len - 8); |
120 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
121 | for (j = 0; j < type_ptr[1]; j++) { |
122 | desc_ptr += 4; |
123 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && |
124 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) |
125 | continue; |
126 | if (count++ == descriptor) { |
127 | memcpy(desc_ptr, desc, 4); |
128 | /* set select */ |
129 | desc_ptr[0] |= 0x80; |
130 | /* clear reserved, just in case */ |
131 | desc_ptr[0] &= 0xf0; |
132 | } |
133 | } |
134 | } |
135 | |
136 | return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); |
137 | } |
138 | |
139 | static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev, |
140 | struct enclosure_component *ecomp) |
141 | { |
142 | int i, j, count = 0, descriptor = ecomp->number; |
143 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
144 | struct ses_device *ses_dev = edev->scratch; |
145 | unsigned char *type_ptr = ses_dev->page1_types; |
146 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
147 | |
148 | ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); |
149 | |
150 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
151 | for (j = 0; j < type_ptr[1]; j++) { |
152 | desc_ptr += 4; |
153 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && |
154 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) |
155 | continue; |
156 | if (count++ == descriptor) |
157 | return desc_ptr; |
158 | } |
159 | } |
160 | return NULL; |
161 | } |
162 | |
163 | /* For device slot and array device slot elements, byte 3 bit 6 |
164 | * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this |
165 | * code stands these bits are shifted 4 positions right so in |
166 | * sysfs they will appear as bits 2 and 1 respectively. Strange. */ |
167 | static void ses_get_fault(struct enclosure_device *edev, |
168 | struct enclosure_component *ecomp) |
169 | { |
170 | unsigned char *desc; |
171 | |
172 | desc = ses_get_page2_descriptor(edev, ecomp); |
173 | if (desc) |
174 | ecomp->fault = (desc[3] & 0x60) >> 4; |
175 | } |
176 | |
177 | static int ses_set_fault(struct enclosure_device *edev, |
178 | struct enclosure_component *ecomp, |
179 | enum enclosure_component_setting val) |
180 | { |
181 | unsigned char desc[4] = {0 }; |
182 | |
183 | switch (val) { |
184 | case ENCLOSURE_SETTING_DISABLED: |
185 | /* zero is disabled */ |
186 | break; |
187 | case ENCLOSURE_SETTING_ENABLED: |
188 | desc[3] = 0x20; |
189 | break; |
190 | default: |
191 | /* SES doesn't do the SGPIO blink settings */ |
192 | return -EINVAL; |
193 | } |
194 | |
195 | return ses_set_page2_descriptor(edev, ecomp, desc); |
196 | } |
197 | |
198 | static void ses_get_status(struct enclosure_device *edev, |
199 | struct enclosure_component *ecomp) |
200 | { |
201 | unsigned char *desc; |
202 | |
203 | desc = ses_get_page2_descriptor(edev, ecomp); |
204 | if (desc) |
205 | ecomp->status = (desc[0] & 0x0f); |
206 | } |
207 | |
208 | static void ses_get_locate(struct enclosure_device *edev, |
209 | struct enclosure_component *ecomp) |
210 | { |
211 | unsigned char *desc; |
212 | |
213 | desc = ses_get_page2_descriptor(edev, ecomp); |
214 | if (desc) |
215 | ecomp->locate = (desc[2] & 0x02) ? 1 : 0; |
216 | } |
217 | |
218 | static int ses_set_locate(struct enclosure_device *edev, |
219 | struct enclosure_component *ecomp, |
220 | enum enclosure_component_setting val) |
221 | { |
222 | unsigned char desc[4] = {0 }; |
223 | |
224 | switch (val) { |
225 | case ENCLOSURE_SETTING_DISABLED: |
226 | /* zero is disabled */ |
227 | break; |
228 | case ENCLOSURE_SETTING_ENABLED: |
229 | desc[2] = 0x02; |
230 | break; |
231 | default: |
232 | /* SES doesn't do the SGPIO blink settings */ |
233 | return -EINVAL; |
234 | } |
235 | return ses_set_page2_descriptor(edev, ecomp, desc); |
236 | } |
237 | |
238 | static int ses_set_active(struct enclosure_device *edev, |
239 | struct enclosure_component *ecomp, |
240 | enum enclosure_component_setting val) |
241 | { |
242 | unsigned char desc[4] = {0 }; |
243 | |
244 | switch (val) { |
245 | case ENCLOSURE_SETTING_DISABLED: |
246 | /* zero is disabled */ |
247 | ecomp->active = 0; |
248 | break; |
249 | case ENCLOSURE_SETTING_ENABLED: |
250 | desc[2] = 0x80; |
251 | ecomp->active = 1; |
252 | break; |
253 | default: |
254 | /* SES doesn't do the SGPIO blink settings */ |
255 | return -EINVAL; |
256 | } |
257 | return ses_set_page2_descriptor(edev, ecomp, desc); |
258 | } |
259 | |
260 | static struct enclosure_component_callbacks ses_enclosure_callbacks = { |
261 | .get_fault = ses_get_fault, |
262 | .set_fault = ses_set_fault, |
263 | .get_status = ses_get_status, |
264 | .get_locate = ses_get_locate, |
265 | .set_locate = ses_set_locate, |
266 | .set_active = ses_set_active, |
267 | }; |
268 | |
269 | struct ses_host_edev { |
270 | struct Scsi_Host *shost; |
271 | struct enclosure_device *edev; |
272 | }; |
273 | |
274 | #if 0 |
275 | int ses_match_host(struct enclosure_device *edev, void *data) |
276 | { |
277 | struct ses_host_edev *sed = data; |
278 | struct scsi_device *sdev; |
279 | |
280 | if (!scsi_is_sdev_device(edev->edev.parent)) |
281 | return 0; |
282 | |
283 | sdev = to_scsi_device(edev->edev.parent); |
284 | |
285 | if (sdev->host != sed->shost) |
286 | return 0; |
287 | |
288 | sed->edev = edev; |
289 | return 1; |
290 | } |
291 | #endif /* 0 */ |
292 | |
293 | static void ses_process_descriptor(struct enclosure_component *ecomp, |
294 | unsigned char *desc) |
295 | { |
296 | int eip = desc[0] & 0x10; |
297 | int invalid = desc[0] & 0x80; |
298 | enum scsi_protocol proto = desc[0] & 0x0f; |
299 | u64 addr = 0; |
300 | struct ses_component *scomp = ecomp->scratch; |
301 | unsigned char *d; |
302 | |
303 | scomp->desc = desc; |
304 | |
305 | if (invalid) |
306 | return; |
307 | |
308 | switch (proto) { |
309 | case SCSI_PROTOCOL_SAS: |
310 | if (eip) |
311 | d = desc + 8; |
312 | else |
313 | d = desc + 4; |
314 | /* only take the phy0 addr */ |
315 | addr = (u64)d[12] << 56 | |
316 | (u64)d[13] << 48 | |
317 | (u64)d[14] << 40 | |
318 | (u64)d[15] << 32 | |
319 | (u64)d[16] << 24 | |
320 | (u64)d[17] << 16 | |
321 | (u64)d[18] << 8 | |
322 | (u64)d[19]; |
323 | break; |
324 | default: |
325 | /* FIXME: Need to add more protocols than just SAS */ |
326 | break; |
327 | } |
328 | scomp->addr = addr; |
329 | } |
330 | |
331 | struct efd { |
332 | u64 addr; |
333 | struct device *dev; |
334 | }; |
335 | |
336 | static int ses_enclosure_find_by_addr(struct enclosure_device *edev, |
337 | void *data) |
338 | { |
339 | struct efd *efd = data; |
340 | int i; |
341 | struct ses_component *scomp; |
342 | |
343 | if (!edev->component[0].scratch) |
344 | return 0; |
345 | |
346 | for (i = 0; i < edev->components; i++) { |
347 | scomp = edev->component[i].scratch; |
348 | if (scomp->addr != efd->addr) |
349 | continue; |
350 | |
351 | enclosure_add_device(edev, i, efd->dev); |
352 | return 1; |
353 | } |
354 | return 0; |
355 | } |
356 | |
357 | #define INIT_ALLOC_SIZE 32 |
358 | |
359 | static void ses_enclosure_data_process(struct enclosure_device *edev, |
360 | struct scsi_device *sdev, |
361 | int create) |
362 | { |
363 | u32 result; |
364 | unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL; |
365 | int i, j, page7_len, len, components; |
366 | struct ses_device *ses_dev = edev->scratch; |
367 | int types = ses_dev->page1_num_types; |
368 | unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); |
369 | |
370 | if (!hdr_buf) |
371 | goto simple_populate; |
372 | |
373 | /* re-read page 10 */ |
374 | if (ses_dev->page10) |
375 | ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len); |
376 | /* Page 7 for the descriptors is optional */ |
377 | result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE); |
378 | if (result) |
379 | goto simple_populate; |
380 | |
381 | page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
382 | /* add 1 for trailing '\0' we'll use */ |
383 | buf = kzalloc(len + 1, GFP_KERNEL); |
384 | if (!buf) |
385 | goto simple_populate; |
386 | result = ses_recv_diag(sdev, 7, buf, len); |
387 | if (result) { |
388 | simple_populate: |
389 | kfree(buf); |
390 | buf = NULL; |
391 | desc_ptr = NULL; |
392 | len = 0; |
393 | page7_len = 0; |
394 | } else { |
395 | desc_ptr = buf + 8; |
396 | len = (desc_ptr[2] << 8) + desc_ptr[3]; |
397 | /* skip past overall descriptor */ |
398 | desc_ptr += len + 4; |
399 | } |
400 | if (ses_dev->page10) |
401 | addl_desc_ptr = ses_dev->page10 + 8; |
402 | type_ptr = ses_dev->page1_types; |
403 | components = 0; |
404 | for (i = 0; i < types; i++, type_ptr += 4) { |
405 | for (j = 0; j < type_ptr[1]; j++) { |
406 | char *name = NULL; |
407 | struct enclosure_component *ecomp; |
408 | |
409 | if (desc_ptr) { |
410 | if (desc_ptr >= buf + page7_len) { |
411 | desc_ptr = NULL; |
412 | } else { |
413 | len = (desc_ptr[2] << 8) + desc_ptr[3]; |
414 | desc_ptr += 4; |
415 | /* Add trailing zero - pushes into |
416 | * reserved space */ |
417 | desc_ptr[len] = '\0'; |
418 | name = desc_ptr; |
419 | } |
420 | } |
421 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || |
422 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) { |
423 | |
424 | if (create) |
425 | ecomp = enclosure_component_register(edev, |
426 | components++, |
427 | type_ptr[0], |
428 | name); |
429 | else |
430 | ecomp = &edev->component[components++]; |
431 | |
432 | if (!IS_ERR(ecomp) && addl_desc_ptr) |
433 | ses_process_descriptor(ecomp, |
434 | addl_desc_ptr); |
435 | } |
436 | if (desc_ptr) |
437 | desc_ptr += len; |
438 | |
439 | if (addl_desc_ptr) |
440 | addl_desc_ptr += addl_desc_ptr[1] + 2; |
441 | |
442 | } |
443 | } |
444 | kfree(buf); |
445 | kfree(hdr_buf); |
446 | } |
447 | |
448 | static void ses_match_to_enclosure(struct enclosure_device *edev, |
449 | struct scsi_device *sdev) |
450 | { |
451 | unsigned char *buf; |
452 | unsigned char *desc; |
453 | unsigned int vpd_len; |
454 | struct efd efd = { |
455 | .addr = 0, |
456 | }; |
457 | |
458 | buf = kmalloc(INIT_ALLOC_SIZE, GFP_KERNEL); |
459 | if (!buf || scsi_get_vpd_page(sdev, 0x83, buf, INIT_ALLOC_SIZE)) |
460 | goto free; |
461 | |
462 | ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0); |
463 | |
464 | vpd_len = ((buf[2] << 8) | buf[3]) + 4; |
465 | kfree(buf); |
466 | buf = kmalloc(vpd_len, GFP_KERNEL); |
467 | if (!buf ||scsi_get_vpd_page(sdev, 0x83, buf, vpd_len)) |
468 | goto free; |
469 | |
470 | desc = buf + 4; |
471 | while (desc < buf + vpd_len) { |
472 | enum scsi_protocol proto = desc[0] >> 4; |
473 | u8 code_set = desc[0] & 0x0f; |
474 | u8 piv = desc[1] & 0x80; |
475 | u8 assoc = (desc[1] & 0x30) >> 4; |
476 | u8 type = desc[1] & 0x0f; |
477 | u8 len = desc[3]; |
478 | |
479 | if (piv && code_set == 1 && assoc == 1 |
480 | && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8) |
481 | efd.addr = (u64)desc[4] << 56 | |
482 | (u64)desc[5] << 48 | |
483 | (u64)desc[6] << 40 | |
484 | (u64)desc[7] << 32 | |
485 | (u64)desc[8] << 24 | |
486 | (u64)desc[9] << 16 | |
487 | (u64)desc[10] << 8 | |
488 | (u64)desc[11]; |
489 | |
490 | desc += len + 4; |
491 | } |
492 | if (!efd.addr) |
493 | goto free; |
494 | |
495 | efd.dev = &sdev->sdev_gendev; |
496 | |
497 | enclosure_for_each_device(ses_enclosure_find_by_addr, &efd); |
498 | free: |
499 | kfree(buf); |
500 | } |
501 | |
502 | static int ses_intf_add(struct device *cdev, |
503 | struct class_interface *intf) |
504 | { |
505 | struct scsi_device *sdev = to_scsi_device(cdev->parent); |
506 | struct scsi_device *tmp_sdev; |
507 | unsigned char *buf = NULL, *hdr_buf, *type_ptr; |
508 | struct ses_device *ses_dev; |
509 | u32 result; |
510 | int i, types, len, components = 0; |
511 | int err = -ENOMEM; |
512 | int num_enclosures; |
513 | struct enclosure_device *edev; |
514 | struct ses_component *scomp = NULL; |
515 | |
516 | if (!scsi_device_enclosure(sdev)) { |
517 | /* not an enclosure, but might be in one */ |
518 | struct enclosure_device *prev = NULL; |
519 | |
520 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { |
521 | ses_match_to_enclosure(edev, sdev); |
522 | prev = edev; |
523 | } |
524 | return -ENODEV; |
525 | } |
526 | |
527 | /* TYPE_ENCLOSURE prints a message in probe */ |
528 | if (sdev->type != TYPE_ENCLOSURE) |
529 | sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n"); |
530 | |
531 | ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL); |
532 | hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); |
533 | if (!hdr_buf || !ses_dev) |
534 | goto err_init_free; |
535 | |
536 | result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE); |
537 | if (result) |
538 | goto recv_failed; |
539 | |
540 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
541 | buf = kzalloc(len, GFP_KERNEL); |
542 | if (!buf) |
543 | goto err_free; |
544 | |
545 | result = ses_recv_diag(sdev, 1, buf, len); |
546 | if (result) |
547 | goto recv_failed; |
548 | |
549 | types = 0; |
550 | |
551 | /* we always have one main enclosure and the rest are referred |
552 | * to as secondary subenclosures */ |
553 | num_enclosures = buf[1] + 1; |
554 | |
555 | /* begin at the enclosure descriptor */ |
556 | type_ptr = buf + 8; |
557 | /* skip all the enclosure descriptors */ |
558 | for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) { |
559 | types += type_ptr[2]; |
560 | type_ptr += type_ptr[3] + 4; |
561 | } |
562 | |
563 | ses_dev->page1_types = type_ptr; |
564 | ses_dev->page1_num_types = types; |
565 | |
566 | for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) { |
567 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || |
568 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) |
569 | components += type_ptr[1]; |
570 | } |
571 | ses_dev->page1 = buf; |
572 | ses_dev->page1_len = len; |
573 | buf = NULL; |
574 | |
575 | result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE); |
576 | if (result) |
577 | goto recv_failed; |
578 | |
579 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
580 | buf = kzalloc(len, GFP_KERNEL); |
581 | if (!buf) |
582 | goto err_free; |
583 | |
584 | /* make sure getting page 2 actually works */ |
585 | result = ses_recv_diag(sdev, 2, buf, len); |
586 | if (result) |
587 | goto recv_failed; |
588 | ses_dev->page2 = buf; |
589 | ses_dev->page2_len = len; |
590 | buf = NULL; |
591 | |
592 | /* The additional information page --- allows us |
593 | * to match up the devices */ |
594 | result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE); |
595 | if (!result) { |
596 | |
597 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
598 | buf = kzalloc(len, GFP_KERNEL); |
599 | if (!buf) |
600 | goto err_free; |
601 | |
602 | result = ses_recv_diag(sdev, 10, buf, len); |
603 | if (result) |
604 | goto recv_failed; |
605 | ses_dev->page10 = buf; |
606 | ses_dev->page10_len = len; |
607 | buf = NULL; |
608 | } |
609 | scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL); |
610 | if (!scomp) |
611 | goto err_free; |
612 | |
613 | edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev), |
614 | components, &ses_enclosure_callbacks); |
615 | if (IS_ERR(edev)) { |
616 | err = PTR_ERR(edev); |
617 | goto err_free; |
618 | } |
619 | |
620 | kfree(hdr_buf); |
621 | |
622 | edev->scratch = ses_dev; |
623 | for (i = 0; i < components; i++) |
624 | edev->component[i].scratch = scomp + i; |
625 | |
626 | ses_enclosure_data_process(edev, sdev, 1); |
627 | |
628 | /* see if there are any devices matching before |
629 | * we found the enclosure */ |
630 | shost_for_each_device(tmp_sdev, sdev->host) { |
631 | if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) |
632 | continue; |
633 | ses_match_to_enclosure(edev, tmp_sdev); |
634 | } |
635 | |
636 | return 0; |
637 | |
638 | recv_failed: |
639 | sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n", |
640 | result); |
641 | err = -ENODEV; |
642 | err_free: |
643 | kfree(buf); |
644 | kfree(scomp); |
645 | kfree(ses_dev->page10); |
646 | kfree(ses_dev->page2); |
647 | kfree(ses_dev->page1); |
648 | err_init_free: |
649 | kfree(ses_dev); |
650 | kfree(hdr_buf); |
651 | sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err); |
652 | return err; |
653 | } |
654 | |
655 | static int ses_remove(struct device *dev) |
656 | { |
657 | return 0; |
658 | } |
659 | |
660 | static void ses_intf_remove_component(struct scsi_device *sdev) |
661 | { |
662 | struct enclosure_device *edev, *prev = NULL; |
663 | |
664 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { |
665 | prev = edev; |
666 | if (!enclosure_remove_device(edev, &sdev->sdev_gendev)) |
667 | break; |
668 | } |
669 | if (edev) |
670 | put_device(&edev->edev); |
671 | } |
672 | |
673 | static void ses_intf_remove_enclosure(struct scsi_device *sdev) |
674 | { |
675 | struct enclosure_device *edev; |
676 | struct ses_device *ses_dev; |
677 | |
678 | /* exact match to this enclosure */ |
679 | edev = enclosure_find(&sdev->sdev_gendev, NULL); |
680 | if (!edev) |
681 | return; |
682 | |
683 | ses_dev = edev->scratch; |
684 | edev->scratch = NULL; |
685 | |
686 | kfree(ses_dev->page10); |
687 | kfree(ses_dev->page1); |
688 | kfree(ses_dev->page2); |
689 | kfree(ses_dev); |
690 | |
691 | kfree(edev->component[0].scratch); |
692 | |
693 | put_device(&edev->edev); |
694 | enclosure_unregister(edev); |
695 | } |
696 | |
697 | static void ses_intf_remove(struct device *cdev, |
698 | struct class_interface *intf) |
699 | { |
700 | struct scsi_device *sdev = to_scsi_device(cdev->parent); |
701 | |
702 | if (!scsi_device_enclosure(sdev)) |
703 | ses_intf_remove_component(sdev); |
704 | else |
705 | ses_intf_remove_enclosure(sdev); |
706 | } |
707 | |
708 | static struct class_interface ses_interface = { |
709 | .add_dev = ses_intf_add, |
710 | .remove_dev = ses_intf_remove, |
711 | }; |
712 | |
713 | static struct scsi_driver ses_template = { |
714 | .owner = THIS_MODULE, |
715 | .gendrv = { |
716 | .name = "ses", |
717 | .probe = ses_probe, |
718 | .remove = ses_remove, |
719 | }, |
720 | }; |
721 | |
722 | static int __init ses_init(void) |
723 | { |
724 | int err; |
725 | |
726 | err = scsi_register_interface(&ses_interface); |
727 | if (err) |
728 | return err; |
729 | |
730 | err = scsi_register_driver(&ses_template.gendrv); |
731 | if (err) |
732 | goto out_unreg; |
733 | |
734 | return 0; |
735 | |
736 | out_unreg: |
737 | scsi_unregister_interface(&ses_interface); |
738 | return err; |
739 | } |
740 | |
741 | static void __exit ses_exit(void) |
742 | { |
743 | scsi_unregister_driver(&ses_template.gendrv); |
744 | scsi_unregister_interface(&ses_interface); |
745 | } |
746 | |
747 | module_init(ses_init); |
748 | module_exit(ses_exit); |
749 | |
750 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE); |
751 | |
752 | MODULE_AUTHOR("James Bottomley"); |
753 | MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver"); |
754 | MODULE_LICENSE("GPL v2"); |
755 |
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v2.6.34-rc5
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