Commit | Line | Data |
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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 | ||
64 | #define SES_TIMEOUT 30 | |
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, | |
80 | NULL, SES_TIMEOUT, SES_RETRIES); | |
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, | |
98 | NULL, SES_TIMEOUT, SES_RETRIES); | |
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; | |
110 | struct scsi_device *sdev = to_scsi_device(edev->cdev.dev); | |
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; | |
140 | struct scsi_device *sdev = to_scsi_device(edev->cdev.dev); | |
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 | ||
267 | int ses_match_host(struct enclosure_device *edev, void *data) | |
268 | { | |
269 | struct ses_host_edev *sed = data; | |
270 | struct scsi_device *sdev; | |
271 | ||
272 | if (!scsi_is_sdev_device(edev->cdev.dev)) | |
273 | return 0; | |
274 | ||
275 | sdev = to_scsi_device(edev->cdev.dev); | |
276 | ||
277 | if (sdev->host != sed->shost) | |
278 | return 0; | |
279 | ||
280 | sed->edev = edev; | |
281 | return 1; | |
282 | } | |
283 | ||
284 | static void ses_process_descriptor(struct enclosure_component *ecomp, | |
285 | unsigned char *desc) | |
286 | { | |
287 | int eip = desc[0] & 0x10; | |
288 | int invalid = desc[0] & 0x80; | |
289 | enum scsi_protocol proto = desc[0] & 0x0f; | |
290 | u64 addr = 0; | |
291 | struct ses_component *scomp = ecomp->scratch; | |
292 | unsigned char *d; | |
293 | ||
294 | scomp->desc = desc; | |
295 | ||
296 | if (invalid) | |
297 | return; | |
298 | ||
299 | switch (proto) { | |
300 | case SCSI_PROTOCOL_SAS: | |
301 | if (eip) | |
302 | d = desc + 8; | |
303 | else | |
304 | d = desc + 4; | |
305 | /* only take the phy0 addr */ | |
306 | addr = (u64)d[12] << 56 | | |
307 | (u64)d[13] << 48 | | |
308 | (u64)d[14] << 40 | | |
309 | (u64)d[15] << 32 | | |
310 | (u64)d[16] << 24 | | |
311 | (u64)d[17] << 16 | | |
312 | (u64)d[18] << 8 | | |
313 | (u64)d[19]; | |
314 | break; | |
315 | default: | |
316 | /* FIXME: Need to add more protocols than just SAS */ | |
317 | break; | |
318 | } | |
319 | scomp->addr = addr; | |
320 | } | |
321 | ||
322 | struct efd { | |
323 | u64 addr; | |
324 | struct device *dev; | |
325 | }; | |
326 | ||
327 | static int ses_enclosure_find_by_addr(struct enclosure_device *edev, | |
328 | void *data) | |
329 | { | |
330 | struct efd *efd = data; | |
331 | int i; | |
332 | struct ses_component *scomp; | |
333 | ||
334 | if (!edev->component[0].scratch) | |
335 | return 0; | |
336 | ||
337 | for (i = 0; i < edev->components; i++) { | |
338 | scomp = edev->component[i].scratch; | |
339 | if (scomp->addr != efd->addr) | |
340 | continue; | |
341 | ||
342 | enclosure_add_device(edev, i, efd->dev); | |
343 | return 1; | |
344 | } | |
345 | return 0; | |
346 | } | |
347 | ||
348 | #define VPD_INQUIRY_SIZE 512 | |
349 | ||
350 | static void ses_match_to_enclosure(struct enclosure_device *edev, | |
351 | struct scsi_device *sdev) | |
352 | { | |
353 | unsigned char *buf = kmalloc(VPD_INQUIRY_SIZE, GFP_KERNEL); | |
354 | unsigned char *desc; | |
355 | int len; | |
356 | struct efd efd = { | |
357 | .addr = 0, | |
358 | }; | |
359 | unsigned char cmd[] = { | |
360 | INQUIRY, | |
361 | 1, | |
362 | 0x83, | |
363 | VPD_INQUIRY_SIZE >> 8, | |
364 | VPD_INQUIRY_SIZE & 0xff, | |
365 | 0 | |
366 | }; | |
367 | ||
368 | if (!buf) | |
369 | return; | |
370 | ||
371 | if (scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, | |
372 | VPD_INQUIRY_SIZE, NULL, SES_TIMEOUT, SES_RETRIES)) | |
373 | goto free; | |
374 | ||
375 | len = (buf[2] << 8) + buf[3]; | |
376 | desc = buf + 4; | |
377 | while (desc < buf + len) { | |
378 | enum scsi_protocol proto = desc[0] >> 4; | |
379 | u8 code_set = desc[0] & 0x0f; | |
380 | u8 piv = desc[1] & 0x80; | |
381 | u8 assoc = (desc[1] & 0x30) >> 4; | |
382 | u8 type = desc[1] & 0x0f; | |
383 | u8 len = desc[3]; | |
384 | ||
385 | if (piv && code_set == 1 && assoc == 1 && code_set == 1 | |
386 | && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8) | |
387 | efd.addr = (u64)desc[4] << 56 | | |
388 | (u64)desc[5] << 48 | | |
389 | (u64)desc[6] << 40 | | |
390 | (u64)desc[7] << 32 | | |
391 | (u64)desc[8] << 24 | | |
392 | (u64)desc[9] << 16 | | |
393 | (u64)desc[10] << 8 | | |
394 | (u64)desc[11]; | |
395 | ||
396 | desc += len + 4; | |
397 | } | |
398 | if (!efd.addr) | |
399 | goto free; | |
400 | ||
401 | efd.dev = &sdev->sdev_gendev; | |
402 | ||
403 | enclosure_for_each_device(ses_enclosure_find_by_addr, &efd); | |
404 | free: | |
405 | kfree(buf); | |
406 | } | |
407 | ||
408 | #define INIT_ALLOC_SIZE 32 | |
409 | ||
410 | static int ses_intf_add(struct class_device *cdev, | |
411 | struct class_interface *intf) | |
412 | { | |
413 | struct scsi_device *sdev = to_scsi_device(cdev->dev); | |
414 | struct scsi_device *tmp_sdev; | |
691b4773 YL |
415 | unsigned char *buf = NULL, *hdr_buf, *type_ptr, *desc_ptr = NULL, |
416 | *addl_desc_ptr = NULL; | |
9927c688 JB |
417 | struct ses_device *ses_dev; |
418 | u32 result; | |
691b4773 | 419 | int i, j, types, len, page7_len = 0, components = 0; |
9927c688 JB |
420 | int err = -ENOMEM; |
421 | struct enclosure_device *edev; | |
7c46c20a | 422 | struct ses_component *scomp = NULL; |
9927c688 JB |
423 | |
424 | if (!scsi_device_enclosure(sdev)) { | |
425 | /* not an enclosure, but might be in one */ | |
7c46c20a | 426 | edev = enclosure_find(&sdev->host->shost_gendev); |
9927c688 JB |
427 | if (edev) { |
428 | ses_match_to_enclosure(edev, sdev); | |
429 | class_device_put(&edev->cdev); | |
430 | } | |
431 | return -ENODEV; | |
432 | } | |
433 | ||
434 | /* TYPE_ENCLOSURE prints a message in probe */ | |
435 | if (sdev->type != TYPE_ENCLOSURE) | |
436 | sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n"); | |
437 | ||
438 | ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL); | |
439 | hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); | |
440 | if (!hdr_buf || !ses_dev) | |
441 | goto err_init_free; | |
442 | ||
443 | result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE); | |
444 | if (result) | |
445 | goto recv_failed; | |
446 | ||
447 | if (hdr_buf[1] != 0) { | |
448 | /* FIXME: need subenclosure support; I've just never | |
449 | * seen a device with subenclosures and it makes the | |
450 | * traversal routines more complex */ | |
451 | sdev_printk(KERN_ERR, sdev, | |
452 | "FIXME driver has no support for subenclosures (%d)\n", | |
691b4773 | 453 | hdr_buf[1]); |
9927c688 JB |
454 | goto err_free; |
455 | } | |
456 | ||
457 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
458 | buf = kzalloc(len, GFP_KERNEL); | |
459 | if (!buf) | |
460 | goto err_free; | |
461 | ||
9927c688 JB |
462 | result = ses_recv_diag(sdev, 1, buf, len); |
463 | if (result) | |
464 | goto recv_failed; | |
465 | ||
466 | types = buf[10]; | |
9927c688 | 467 | |
691b4773 | 468 | type_ptr = buf + 12 + buf[11]; |
9927c688 JB |
469 | |
470 | for (i = 0; i < types; i++, type_ptr += 4) { | |
471 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
472 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
473 | components += type_ptr[1]; | |
474 | } | |
7c46c20a YL |
475 | ses_dev->page1 = buf; |
476 | ses_dev->page1_len = len; | |
477 | buf = NULL; | |
9927c688 JB |
478 | |
479 | result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE); | |
480 | if (result) | |
481 | goto recv_failed; | |
482 | ||
483 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
484 | buf = kzalloc(len, GFP_KERNEL); | |
485 | if (!buf) | |
486 | goto err_free; | |
487 | ||
488 | /* make sure getting page 2 actually works */ | |
489 | result = ses_recv_diag(sdev, 2, buf, len); | |
490 | if (result) | |
491 | goto recv_failed; | |
492 | ses_dev->page2 = buf; | |
493 | ses_dev->page2_len = len; | |
7c46c20a | 494 | buf = NULL; |
9927c688 JB |
495 | |
496 | /* The additional information page --- allows us | |
497 | * to match up the devices */ | |
498 | result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE); | |
691b4773 YL |
499 | if (!result) { |
500 | ||
501 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
502 | buf = kzalloc(len, GFP_KERNEL); | |
503 | if (!buf) | |
504 | goto err_free; | |
505 | ||
506 | result = ses_recv_diag(sdev, 10, buf, len); | |
507 | if (result) | |
508 | goto recv_failed; | |
509 | ses_dev->page10 = buf; | |
510 | ses_dev->page10_len = len; | |
511 | buf = NULL; | |
512 | } | |
9927c688 | 513 | |
7c46c20a | 514 | scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL); |
9927c688 | 515 | if (!scomp) |
7c46c20a | 516 | goto err_free; |
9927c688 JB |
517 | |
518 | edev = enclosure_register(cdev->dev, sdev->sdev_gendev.bus_id, | |
519 | components, &ses_enclosure_callbacks); | |
520 | if (IS_ERR(edev)) { | |
521 | err = PTR_ERR(edev); | |
522 | goto err_free; | |
523 | } | |
524 | ||
525 | edev->scratch = ses_dev; | |
526 | for (i = 0; i < components; i++) | |
7c46c20a | 527 | edev->component[i].scratch = scomp + i; |
9927c688 JB |
528 | |
529 | /* Page 7 for the descriptors is optional */ | |
9927c688 JB |
530 | result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE); |
531 | if (result) | |
532 | goto simple_populate; | |
533 | ||
691b4773 | 534 | page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
9927c688 JB |
535 | /* add 1 for trailing '\0' we'll use */ |
536 | buf = kzalloc(len + 1, GFP_KERNEL); | |
7c46c20a YL |
537 | if (!buf) |
538 | goto simple_populate; | |
9927c688 JB |
539 | result = ses_recv_diag(sdev, 7, buf, len); |
540 | if (result) { | |
541 | simple_populate: | |
542 | kfree(buf); | |
543 | buf = NULL; | |
544 | desc_ptr = NULL; | |
545 | addl_desc_ptr = NULL; | |
546 | } else { | |
547 | desc_ptr = buf + 8; | |
548 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
549 | /* skip past overall descriptor */ | |
550 | desc_ptr += len + 4; | |
691b4773 YL |
551 | if (ses_dev->page10) |
552 | addl_desc_ptr = ses_dev->page10 + 8; | |
9927c688 JB |
553 | } |
554 | type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11]; | |
555 | components = 0; | |
556 | for (i = 0; i < types; i++, type_ptr += 4) { | |
557 | for (j = 0; j < type_ptr[1]; j++) { | |
558 | char *name = NULL; | |
559 | struct enclosure_component *ecomp; | |
560 | ||
561 | if (desc_ptr) { | |
691b4773 YL |
562 | if (desc_ptr >= buf + page7_len) { |
563 | desc_ptr = NULL; | |
564 | } else { | |
565 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
566 | desc_ptr += 4; | |
567 | /* Add trailing zero - pushes into | |
568 | * reserved space */ | |
569 | desc_ptr[len] = '\0'; | |
570 | name = desc_ptr; | |
571 | } | |
9927c688 | 572 | } |
691b4773 YL |
573 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || |
574 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) { | |
575 | ||
576 | ecomp = enclosure_component_register(edev, | |
9927c688 JB |
577 | components++, |
578 | type_ptr[0], | |
579 | name); | |
691b4773 YL |
580 | |
581 | if (!IS_ERR(ecomp) && addl_desc_ptr) | |
9927c688 JB |
582 | ses_process_descriptor(ecomp, |
583 | addl_desc_ptr); | |
9927c688 | 584 | } |
691b4773 YL |
585 | if (desc_ptr) |
586 | desc_ptr += len; | |
587 | ||
588 | if (addl_desc_ptr) | |
589 | addl_desc_ptr += addl_desc_ptr[1] + 2; | |
590 | ||
9927c688 JB |
591 | } |
592 | } | |
593 | kfree(buf); | |
594 | kfree(hdr_buf); | |
595 | ||
596 | /* see if there are any devices matching before | |
597 | * we found the enclosure */ | |
598 | shost_for_each_device(tmp_sdev, sdev->host) { | |
599 | if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) | |
600 | continue; | |
601 | ses_match_to_enclosure(edev, tmp_sdev); | |
602 | } | |
603 | ||
604 | return 0; | |
605 | ||
606 | recv_failed: | |
607 | sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n", | |
608 | result); | |
609 | err = -ENODEV; | |
610 | err_free: | |
611 | kfree(buf); | |
7c46c20a | 612 | kfree(scomp); |
9927c688 JB |
613 | kfree(ses_dev->page10); |
614 | kfree(ses_dev->page2); | |
615 | kfree(ses_dev->page1); | |
616 | err_init_free: | |
617 | kfree(ses_dev); | |
618 | kfree(hdr_buf); | |
619 | sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err); | |
620 | return err; | |
621 | } | |
622 | ||
623 | static int ses_remove(struct device *dev) | |
624 | { | |
625 | return 0; | |
626 | } | |
627 | ||
628 | static void ses_intf_remove(struct class_device *cdev, | |
629 | struct class_interface *intf) | |
630 | { | |
631 | struct scsi_device *sdev = to_scsi_device(cdev->dev); | |
632 | struct enclosure_device *edev; | |
633 | struct ses_device *ses_dev; | |
634 | ||
635 | if (!scsi_device_enclosure(sdev)) | |
636 | return; | |
637 | ||
638 | edev = enclosure_find(cdev->dev); | |
639 | if (!edev) | |
640 | return; | |
641 | ||
642 | ses_dev = edev->scratch; | |
643 | edev->scratch = NULL; | |
644 | ||
7c46c20a | 645 | kfree(ses_dev->page10); |
9927c688 JB |
646 | kfree(ses_dev->page1); |
647 | kfree(ses_dev->page2); | |
648 | kfree(ses_dev); | |
649 | ||
650 | kfree(edev->component[0].scratch); | |
651 | ||
652 | class_device_put(&edev->cdev); | |
653 | enclosure_unregister(edev); | |
654 | } | |
655 | ||
656 | static struct class_interface ses_interface = { | |
657 | .add = ses_intf_add, | |
658 | .remove = ses_intf_remove, | |
659 | }; | |
660 | ||
661 | static struct scsi_driver ses_template = { | |
662 | .owner = THIS_MODULE, | |
663 | .gendrv = { | |
664 | .name = "ses", | |
665 | .probe = ses_probe, | |
666 | .remove = ses_remove, | |
667 | }, | |
668 | }; | |
669 | ||
670 | static int __init ses_init(void) | |
671 | { | |
672 | int err; | |
673 | ||
674 | err = scsi_register_interface(&ses_interface); | |
675 | if (err) | |
676 | return err; | |
677 | ||
678 | err = scsi_register_driver(&ses_template.gendrv); | |
679 | if (err) | |
680 | goto out_unreg; | |
681 | ||
682 | return 0; | |
683 | ||
684 | out_unreg: | |
685 | scsi_unregister_interface(&ses_interface); | |
686 | return err; | |
687 | } | |
688 | ||
689 | static void __exit ses_exit(void) | |
690 | { | |
691 | scsi_unregister_driver(&ses_template.gendrv); | |
692 | scsi_unregister_interface(&ses_interface); | |
693 | } | |
694 | ||
695 | module_init(ses_init); | |
696 | module_exit(ses_exit); | |
697 | ||
698 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE); | |
699 | ||
700 | MODULE_AUTHOR("James Bottomley"); | |
701 | MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver"); | |
702 | MODULE_LICENSE("GPL v2"); |