Commit | Line | Data |
---|---|---|
9927c688 JB |
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 { | |
691b4773 YL |
36 | unsigned char *page1; |
37 | unsigned char *page2; | |
38 | unsigned char *page10; | |
9927c688 JB |
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 | ||
c95e62ce | 64 | #define SES_TIMEOUT (30 * HZ) |
9927c688 JB |
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 | { | |
691b4773 | 70 | unsigned char cmd[] = { |
9927c688 JB |
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, | |
f4f4e47e | 80 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
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 | ||
691b4773 | 88 | unsigned char cmd[] = { |
9927c688 JB |
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, | |
f4f4e47e | 98 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
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, | |
691b4773 | 107 | unsigned char *desc) |
9927c688 JB |
108 | { |
109 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 110 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 111 | struct ses_device *ses_dev = edev->scratch; |
691b4773 YL |
112 | unsigned char *type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11]; |
113 | unsigned char *desc_ptr = ses_dev->page2 + 8; | |
9927c688 JB |
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 | ||
691b4773 | 136 | static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev, |
9927c688 JB |
137 | struct enclosure_component *ecomp) |
138 | { | |
139 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 140 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 141 | struct ses_device *ses_dev = edev->scratch; |
691b4773 YL |
142 | unsigned char *type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11]; |
143 | unsigned char *desc_ptr = ses_dev->page2 + 8; | |
9927c688 JB |
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 | static void ses_get_fault(struct enclosure_device *edev, | |
161 | struct enclosure_component *ecomp) | |
162 | { | |
691b4773 | 163 | unsigned char *desc; |
9927c688 JB |
164 | |
165 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
166 | if (desc) |
167 | ecomp->fault = (desc[3] & 0x60) >> 4; | |
9927c688 JB |
168 | } |
169 | ||
170 | static int ses_set_fault(struct enclosure_device *edev, | |
171 | struct enclosure_component *ecomp, | |
172 | enum enclosure_component_setting val) | |
173 | { | |
691b4773 | 174 | unsigned char desc[4] = {0 }; |
9927c688 JB |
175 | |
176 | switch (val) { | |
177 | case ENCLOSURE_SETTING_DISABLED: | |
178 | /* zero is disabled */ | |
179 | break; | |
180 | case ENCLOSURE_SETTING_ENABLED: | |
181 | desc[2] = 0x02; | |
182 | break; | |
183 | default: | |
184 | /* SES doesn't do the SGPIO blink settings */ | |
185 | return -EINVAL; | |
186 | } | |
187 | ||
188 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
189 | } | |
190 | ||
191 | static void ses_get_status(struct enclosure_device *edev, | |
192 | struct enclosure_component *ecomp) | |
193 | { | |
691b4773 | 194 | unsigned char *desc; |
9927c688 JB |
195 | |
196 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
197 | if (desc) |
198 | ecomp->status = (desc[0] & 0x0f); | |
9927c688 JB |
199 | } |
200 | ||
201 | static void ses_get_locate(struct enclosure_device *edev, | |
202 | struct enclosure_component *ecomp) | |
203 | { | |
691b4773 | 204 | unsigned char *desc; |
9927c688 JB |
205 | |
206 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
207 | if (desc) |
208 | ecomp->locate = (desc[2] & 0x02) ? 1 : 0; | |
9927c688 JB |
209 | } |
210 | ||
211 | static int ses_set_locate(struct enclosure_device *edev, | |
212 | struct enclosure_component *ecomp, | |
213 | enum enclosure_component_setting val) | |
214 | { | |
691b4773 | 215 | unsigned char desc[4] = {0 }; |
9927c688 JB |
216 | |
217 | switch (val) { | |
218 | case ENCLOSURE_SETTING_DISABLED: | |
219 | /* zero is disabled */ | |
220 | break; | |
221 | case ENCLOSURE_SETTING_ENABLED: | |
222 | desc[2] = 0x02; | |
223 | break; | |
224 | default: | |
225 | /* SES doesn't do the SGPIO blink settings */ | |
226 | return -EINVAL; | |
227 | } | |
228 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
229 | } | |
230 | ||
231 | static int ses_set_active(struct enclosure_device *edev, | |
232 | struct enclosure_component *ecomp, | |
233 | enum enclosure_component_setting val) | |
234 | { | |
691b4773 | 235 | unsigned char desc[4] = {0 }; |
9927c688 JB |
236 | |
237 | switch (val) { | |
238 | case ENCLOSURE_SETTING_DISABLED: | |
239 | /* zero is disabled */ | |
240 | ecomp->active = 0; | |
241 | break; | |
242 | case ENCLOSURE_SETTING_ENABLED: | |
243 | desc[2] = 0x80; | |
244 | ecomp->active = 1; | |
245 | break; | |
246 | default: | |
247 | /* SES doesn't do the SGPIO blink settings */ | |
248 | return -EINVAL; | |
249 | } | |
250 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
251 | } | |
252 | ||
253 | static struct enclosure_component_callbacks ses_enclosure_callbacks = { | |
254 | .get_fault = ses_get_fault, | |
255 | .set_fault = ses_set_fault, | |
256 | .get_status = ses_get_status, | |
257 | .get_locate = ses_get_locate, | |
258 | .set_locate = ses_set_locate, | |
259 | .set_active = ses_set_active, | |
260 | }; | |
261 | ||
262 | struct ses_host_edev { | |
263 | struct Scsi_Host *shost; | |
264 | struct enclosure_device *edev; | |
265 | }; | |
266 | ||
e0aae1a5 | 267 | #if 0 |
9927c688 JB |
268 | int ses_match_host(struct enclosure_device *edev, void *data) |
269 | { | |
270 | struct ses_host_edev *sed = data; | |
271 | struct scsi_device *sdev; | |
272 | ||
ee959b00 | 273 | if (!scsi_is_sdev_device(edev->edev.parent)) |
9927c688 JB |
274 | return 0; |
275 | ||
ee959b00 | 276 | sdev = to_scsi_device(edev->edev.parent); |
9927c688 JB |
277 | |
278 | if (sdev->host != sed->shost) | |
279 | return 0; | |
280 | ||
281 | sed->edev = edev; | |
282 | return 1; | |
283 | } | |
e0aae1a5 | 284 | #endif /* 0 */ |
9927c688 JB |
285 | |
286 | static void ses_process_descriptor(struct enclosure_component *ecomp, | |
287 | unsigned char *desc) | |
288 | { | |
289 | int eip = desc[0] & 0x10; | |
290 | int invalid = desc[0] & 0x80; | |
291 | enum scsi_protocol proto = desc[0] & 0x0f; | |
292 | u64 addr = 0; | |
293 | struct ses_component *scomp = ecomp->scratch; | |
294 | unsigned char *d; | |
295 | ||
296 | scomp->desc = desc; | |
297 | ||
298 | if (invalid) | |
299 | return; | |
300 | ||
301 | switch (proto) { | |
302 | case SCSI_PROTOCOL_SAS: | |
303 | if (eip) | |
304 | d = desc + 8; | |
305 | else | |
306 | d = desc + 4; | |
307 | /* only take the phy0 addr */ | |
308 | addr = (u64)d[12] << 56 | | |
309 | (u64)d[13] << 48 | | |
310 | (u64)d[14] << 40 | | |
311 | (u64)d[15] << 32 | | |
312 | (u64)d[16] << 24 | | |
313 | (u64)d[17] << 16 | | |
314 | (u64)d[18] << 8 | | |
315 | (u64)d[19]; | |
316 | break; | |
317 | default: | |
318 | /* FIXME: Need to add more protocols than just SAS */ | |
319 | break; | |
320 | } | |
321 | scomp->addr = addr; | |
322 | } | |
323 | ||
324 | struct efd { | |
325 | u64 addr; | |
326 | struct device *dev; | |
327 | }; | |
328 | ||
329 | static int ses_enclosure_find_by_addr(struct enclosure_device *edev, | |
330 | void *data) | |
331 | { | |
332 | struct efd *efd = data; | |
333 | int i; | |
334 | struct ses_component *scomp; | |
335 | ||
336 | if (!edev->component[0].scratch) | |
337 | return 0; | |
338 | ||
339 | for (i = 0; i < edev->components; i++) { | |
340 | scomp = edev->component[i].scratch; | |
341 | if (scomp->addr != efd->addr) | |
342 | continue; | |
343 | ||
344 | enclosure_add_device(edev, i, efd->dev); | |
345 | return 1; | |
346 | } | |
347 | return 0; | |
348 | } | |
349 | ||
21fab1d0 JB |
350 | #define INIT_ALLOC_SIZE 32 |
351 | ||
352 | static void ses_enclosure_data_process(struct enclosure_device *edev, | |
353 | struct scsi_device *sdev, | |
354 | int create) | |
355 | { | |
356 | u32 result; | |
357 | unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL; | |
358 | int i, j, page7_len, len, components; | |
359 | struct ses_device *ses_dev = edev->scratch; | |
360 | int types = ses_dev->page1[10]; | |
361 | unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); | |
362 | ||
363 | if (!hdr_buf) | |
364 | goto simple_populate; | |
365 | ||
366 | /* re-read page 10 */ | |
367 | if (ses_dev->page10) | |
368 | ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len); | |
369 | /* Page 7 for the descriptors is optional */ | |
370 | result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE); | |
371 | if (result) | |
372 | goto simple_populate; | |
373 | ||
374 | page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
375 | /* add 1 for trailing '\0' we'll use */ | |
376 | buf = kzalloc(len + 1, GFP_KERNEL); | |
377 | if (!buf) | |
378 | goto simple_populate; | |
379 | result = ses_recv_diag(sdev, 7, buf, len); | |
380 | if (result) { | |
381 | simple_populate: | |
382 | kfree(buf); | |
383 | buf = NULL; | |
384 | desc_ptr = NULL; | |
385 | len = 0; | |
386 | page7_len = 0; | |
387 | } else { | |
388 | desc_ptr = buf + 8; | |
389 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
390 | /* skip past overall descriptor */ | |
391 | desc_ptr += len + 4; | |
392 | if (ses_dev->page10) | |
393 | addl_desc_ptr = ses_dev->page10 + 8; | |
394 | } | |
395 | type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11]; | |
396 | components = 0; | |
397 | for (i = 0; i < types; i++, type_ptr += 4) { | |
398 | for (j = 0; j < type_ptr[1]; j++) { | |
399 | char *name = NULL; | |
400 | struct enclosure_component *ecomp; | |
401 | ||
402 | if (desc_ptr) { | |
403 | if (desc_ptr >= buf + page7_len) { | |
404 | desc_ptr = NULL; | |
405 | } else { | |
406 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
407 | desc_ptr += 4; | |
408 | /* Add trailing zero - pushes into | |
409 | * reserved space */ | |
410 | desc_ptr[len] = '\0'; | |
411 | name = desc_ptr; | |
412 | } | |
413 | } | |
414 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
415 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) { | |
416 | ||
417 | if (create) | |
418 | ecomp = enclosure_component_register(edev, | |
419 | components++, | |
420 | type_ptr[0], | |
421 | name); | |
422 | else | |
423 | ecomp = &edev->component[components++]; | |
424 | ||
425 | if (!IS_ERR(ecomp) && addl_desc_ptr) | |
426 | ses_process_descriptor(ecomp, | |
427 | addl_desc_ptr); | |
428 | } | |
429 | if (desc_ptr) | |
430 | desc_ptr += len; | |
431 | ||
432 | if (addl_desc_ptr) | |
433 | addl_desc_ptr += addl_desc_ptr[1] + 2; | |
434 | ||
435 | } | |
436 | } | |
437 | kfree(buf); | |
438 | kfree(hdr_buf); | |
439 | } | |
440 | ||
9927c688 JB |
441 | static void ses_match_to_enclosure(struct enclosure_device *edev, |
442 | struct scsi_device *sdev) | |
443 | { | |
40c3460f | 444 | unsigned char *buf; |
9927c688 | 445 | unsigned char *desc; |
40c3460f | 446 | unsigned int vpd_len; |
9927c688 JB |
447 | struct efd efd = { |
448 | .addr = 0, | |
449 | }; | |
9927c688 | 450 | |
40c3460f | 451 | buf = scsi_get_vpd_page(sdev, 0x83); |
9927c688 JB |
452 | if (!buf) |
453 | return; | |
454 | ||
21fab1d0 JB |
455 | ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0); |
456 | ||
40c3460f | 457 | vpd_len = ((buf[2] << 8) | buf[3]) + 4; |
671a99c8 | 458 | |
9927c688 | 459 | desc = buf + 4; |
671a99c8 | 460 | while (desc < buf + vpd_len) { |
9927c688 JB |
461 | enum scsi_protocol proto = desc[0] >> 4; |
462 | u8 code_set = desc[0] & 0x0f; | |
463 | u8 piv = desc[1] & 0x80; | |
464 | u8 assoc = (desc[1] & 0x30) >> 4; | |
465 | u8 type = desc[1] & 0x0f; | |
466 | u8 len = desc[3]; | |
467 | ||
b3f1f9aa | 468 | if (piv && code_set == 1 && assoc == 1 |
9927c688 JB |
469 | && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8) |
470 | efd.addr = (u64)desc[4] << 56 | | |
471 | (u64)desc[5] << 48 | | |
472 | (u64)desc[6] << 40 | | |
473 | (u64)desc[7] << 32 | | |
474 | (u64)desc[8] << 24 | | |
475 | (u64)desc[9] << 16 | | |
476 | (u64)desc[10] << 8 | | |
477 | (u64)desc[11]; | |
478 | ||
479 | desc += len + 4; | |
480 | } | |
481 | if (!efd.addr) | |
482 | goto free; | |
483 | ||
484 | efd.dev = &sdev->sdev_gendev; | |
485 | ||
486 | enclosure_for_each_device(ses_enclosure_find_by_addr, &efd); | |
487 | free: | |
488 | kfree(buf); | |
489 | } | |
490 | ||
ee959b00 | 491 | static int ses_intf_add(struct device *cdev, |
9927c688 JB |
492 | struct class_interface *intf) |
493 | { | |
ee959b00 | 494 | struct scsi_device *sdev = to_scsi_device(cdev->parent); |
9927c688 | 495 | struct scsi_device *tmp_sdev; |
21fab1d0 | 496 | unsigned char *buf = NULL, *hdr_buf, *type_ptr; |
9927c688 JB |
497 | struct ses_device *ses_dev; |
498 | u32 result; | |
21fab1d0 | 499 | int i, types, len, components = 0; |
9927c688 JB |
500 | int err = -ENOMEM; |
501 | struct enclosure_device *edev; | |
7c46c20a | 502 | struct ses_component *scomp = NULL; |
9927c688 JB |
503 | |
504 | if (!scsi_device_enclosure(sdev)) { | |
505 | /* not an enclosure, but might be in one */ | |
163f52b6 JB |
506 | struct enclosure_device *prev = NULL; |
507 | ||
508 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
9927c688 | 509 | ses_match_to_enclosure(edev, sdev); |
163f52b6 | 510 | prev = edev; |
9927c688 JB |
511 | } |
512 | return -ENODEV; | |
513 | } | |
514 | ||
515 | /* TYPE_ENCLOSURE prints a message in probe */ | |
516 | if (sdev->type != TYPE_ENCLOSURE) | |
517 | sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n"); | |
518 | ||
519 | ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL); | |
520 | hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); | |
521 | if (!hdr_buf || !ses_dev) | |
522 | goto err_init_free; | |
523 | ||
524 | result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE); | |
525 | if (result) | |
526 | goto recv_failed; | |
527 | ||
528 | if (hdr_buf[1] != 0) { | |
529 | /* FIXME: need subenclosure support; I've just never | |
530 | * seen a device with subenclosures and it makes the | |
531 | * traversal routines more complex */ | |
532 | sdev_printk(KERN_ERR, sdev, | |
533 | "FIXME driver has no support for subenclosures (%d)\n", | |
691b4773 | 534 | hdr_buf[1]); |
9927c688 JB |
535 | goto err_free; |
536 | } | |
537 | ||
538 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
539 | buf = kzalloc(len, GFP_KERNEL); | |
540 | if (!buf) | |
541 | goto err_free; | |
542 | ||
9927c688 JB |
543 | result = ses_recv_diag(sdev, 1, buf, len); |
544 | if (result) | |
545 | goto recv_failed; | |
546 | ||
547 | types = buf[10]; | |
9927c688 | 548 | |
691b4773 | 549 | type_ptr = buf + 12 + buf[11]; |
9927c688 JB |
550 | |
551 | for (i = 0; i < types; i++, type_ptr += 4) { | |
552 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
553 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
554 | components += type_ptr[1]; | |
555 | } | |
7c46c20a YL |
556 | ses_dev->page1 = buf; |
557 | ses_dev->page1_len = len; | |
558 | buf = NULL; | |
9927c688 JB |
559 | |
560 | result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE); | |
561 | if (result) | |
562 | goto recv_failed; | |
563 | ||
564 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
565 | buf = kzalloc(len, GFP_KERNEL); | |
566 | if (!buf) | |
567 | goto err_free; | |
568 | ||
569 | /* make sure getting page 2 actually works */ | |
570 | result = ses_recv_diag(sdev, 2, buf, len); | |
571 | if (result) | |
572 | goto recv_failed; | |
573 | ses_dev->page2 = buf; | |
574 | ses_dev->page2_len = len; | |
7c46c20a | 575 | buf = NULL; |
9927c688 JB |
576 | |
577 | /* The additional information page --- allows us | |
578 | * to match up the devices */ | |
579 | result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE); | |
691b4773 YL |
580 | if (!result) { |
581 | ||
582 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
583 | buf = kzalloc(len, GFP_KERNEL); | |
584 | if (!buf) | |
585 | goto err_free; | |
586 | ||
587 | result = ses_recv_diag(sdev, 10, buf, len); | |
588 | if (result) | |
589 | goto recv_failed; | |
590 | ses_dev->page10 = buf; | |
591 | ses_dev->page10_len = len; | |
592 | buf = NULL; | |
593 | } | |
21fab1d0 | 594 | kfree(hdr_buf); |
9927c688 | 595 | |
7c46c20a | 596 | scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL); |
9927c688 | 597 | if (!scomp) |
7c46c20a | 598 | goto err_free; |
9927c688 | 599 | |
71610f55 | 600 | edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev), |
9927c688 JB |
601 | components, &ses_enclosure_callbacks); |
602 | if (IS_ERR(edev)) { | |
603 | err = PTR_ERR(edev); | |
604 | goto err_free; | |
605 | } | |
606 | ||
607 | edev->scratch = ses_dev; | |
608 | for (i = 0; i < components; i++) | |
7c46c20a | 609 | edev->component[i].scratch = scomp + i; |
9927c688 | 610 | |
21fab1d0 | 611 | ses_enclosure_data_process(edev, sdev, 1); |
9927c688 JB |
612 | |
613 | /* see if there are any devices matching before | |
614 | * we found the enclosure */ | |
615 | shost_for_each_device(tmp_sdev, sdev->host) { | |
616 | if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) | |
617 | continue; | |
618 | ses_match_to_enclosure(edev, tmp_sdev); | |
619 | } | |
620 | ||
621 | return 0; | |
622 | ||
623 | recv_failed: | |
624 | sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n", | |
625 | result); | |
626 | err = -ENODEV; | |
627 | err_free: | |
628 | kfree(buf); | |
7c46c20a | 629 | kfree(scomp); |
9927c688 JB |
630 | kfree(ses_dev->page10); |
631 | kfree(ses_dev->page2); | |
632 | kfree(ses_dev->page1); | |
633 | err_init_free: | |
634 | kfree(ses_dev); | |
635 | kfree(hdr_buf); | |
636 | sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err); | |
637 | return err; | |
638 | } | |
639 | ||
640 | static int ses_remove(struct device *dev) | |
641 | { | |
642 | return 0; | |
643 | } | |
644 | ||
43d8eb9c JB |
645 | static void ses_intf_remove_component(struct scsi_device *sdev) |
646 | { | |
647 | struct enclosure_device *edev, *prev = NULL; | |
648 | ||
649 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
650 | prev = edev; | |
651 | if (!enclosure_remove_device(edev, &sdev->sdev_gendev)) | |
652 | break; | |
653 | } | |
654 | if (edev) | |
655 | put_device(&edev->edev); | |
656 | } | |
657 | ||
658 | static void ses_intf_remove_enclosure(struct scsi_device *sdev) | |
9927c688 | 659 | { |
9927c688 JB |
660 | struct enclosure_device *edev; |
661 | struct ses_device *ses_dev; | |
662 | ||
163f52b6 | 663 | /* exact match to this enclosure */ |
43d8eb9c | 664 | edev = enclosure_find(&sdev->sdev_gendev, NULL); |
9927c688 JB |
665 | if (!edev) |
666 | return; | |
667 | ||
668 | ses_dev = edev->scratch; | |
669 | edev->scratch = NULL; | |
670 | ||
7c46c20a | 671 | kfree(ses_dev->page10); |
9927c688 JB |
672 | kfree(ses_dev->page1); |
673 | kfree(ses_dev->page2); | |
674 | kfree(ses_dev); | |
675 | ||
676 | kfree(edev->component[0].scratch); | |
677 | ||
ee959b00 | 678 | put_device(&edev->edev); |
9927c688 JB |
679 | enclosure_unregister(edev); |
680 | } | |
681 | ||
43d8eb9c JB |
682 | static void ses_intf_remove(struct device *cdev, |
683 | struct class_interface *intf) | |
684 | { | |
685 | struct scsi_device *sdev = to_scsi_device(cdev->parent); | |
686 | ||
687 | if (!scsi_device_enclosure(sdev)) | |
688 | ses_intf_remove_component(sdev); | |
689 | else | |
690 | ses_intf_remove_enclosure(sdev); | |
691 | } | |
692 | ||
9927c688 | 693 | static struct class_interface ses_interface = { |
ee959b00 TJ |
694 | .add_dev = ses_intf_add, |
695 | .remove_dev = ses_intf_remove, | |
9927c688 JB |
696 | }; |
697 | ||
698 | static struct scsi_driver ses_template = { | |
699 | .owner = THIS_MODULE, | |
700 | .gendrv = { | |
701 | .name = "ses", | |
702 | .probe = ses_probe, | |
703 | .remove = ses_remove, | |
704 | }, | |
705 | }; | |
706 | ||
707 | static int __init ses_init(void) | |
708 | { | |
709 | int err; | |
710 | ||
711 | err = scsi_register_interface(&ses_interface); | |
712 | if (err) | |
713 | return err; | |
714 | ||
715 | err = scsi_register_driver(&ses_template.gendrv); | |
716 | if (err) | |
717 | goto out_unreg; | |
718 | ||
719 | return 0; | |
720 | ||
721 | out_unreg: | |
722 | scsi_unregister_interface(&ses_interface); | |
723 | return err; | |
724 | } | |
725 | ||
726 | static void __exit ses_exit(void) | |
727 | { | |
728 | scsi_unregister_driver(&ses_template.gendrv); | |
729 | scsi_unregister_interface(&ses_interface); | |
730 | } | |
731 | ||
732 | module_init(ses_init); | |
733 | module_exit(ses_exit); | |
734 | ||
735 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE); | |
736 | ||
737 | MODULE_AUTHOR("James Bottomley"); | |
738 | MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver"); | |
739 | MODULE_LICENSE("GPL v2"); |