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 | ||
5a0e3ad6 | 24 | #include <linux/slab.h> |
9927c688 JB |
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 { | |
691b4773 | 37 | unsigned char *page1; |
8c3adc79 | 38 | unsigned char *page1_types; |
691b4773 YL |
39 | unsigned char *page2; |
40 | unsigned char *page10; | |
9927c688 | 41 | short page1_len; |
8c3adc79 | 42 | short page1_num_types; |
9927c688 JB |
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 | ||
c95e62ce | 67 | #define SES_TIMEOUT (30 * HZ) |
9927c688 JB |
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 | { | |
691b4773 | 73 | unsigned char cmd[] = { |
9927c688 JB |
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, | |
f4f4e47e | 83 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
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 | ||
691b4773 | 91 | unsigned char cmd[] = { |
9927c688 JB |
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, | |
f4f4e47e | 101 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
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, | |
691b4773 | 110 | unsigned char *desc) |
9927c688 JB |
111 | { |
112 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 113 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 114 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 115 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 116 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 JB |
117 | |
118 | /* Clear everything */ | |
119 | memset(desc_ptr, 0, ses_dev->page2_len - 8); | |
8c3adc79 | 120 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
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 | ||
691b4773 | 139 | static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev, |
9927c688 JB |
140 | struct enclosure_component *ecomp) |
141 | { | |
142 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 143 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 144 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 145 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 146 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 JB |
147 | |
148 | ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); | |
149 | ||
8c3adc79 | 150 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
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 | ||
2a350cab DG |
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. */ | |
9927c688 JB |
167 | static void ses_get_fault(struct enclosure_device *edev, |
168 | struct enclosure_component *ecomp) | |
169 | { | |
691b4773 | 170 | unsigned char *desc; |
9927c688 JB |
171 | |
172 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
173 | if (desc) |
174 | ecomp->fault = (desc[3] & 0x60) >> 4; | |
9927c688 JB |
175 | } |
176 | ||
177 | static int ses_set_fault(struct enclosure_device *edev, | |
178 | struct enclosure_component *ecomp, | |
179 | enum enclosure_component_setting val) | |
180 | { | |
691b4773 | 181 | unsigned char desc[4] = {0 }; |
9927c688 JB |
182 | |
183 | switch (val) { | |
184 | case ENCLOSURE_SETTING_DISABLED: | |
185 | /* zero is disabled */ | |
186 | break; | |
187 | case ENCLOSURE_SETTING_ENABLED: | |
2a350cab | 188 | desc[3] = 0x20; |
9927c688 JB |
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 | { | |
691b4773 | 201 | unsigned char *desc; |
9927c688 JB |
202 | |
203 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
204 | if (desc) |
205 | ecomp->status = (desc[0] & 0x0f); | |
9927c688 JB |
206 | } |
207 | ||
208 | static void ses_get_locate(struct enclosure_device *edev, | |
209 | struct enclosure_component *ecomp) | |
210 | { | |
691b4773 | 211 | unsigned char *desc; |
9927c688 JB |
212 | |
213 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
214 | if (desc) |
215 | ecomp->locate = (desc[2] & 0x02) ? 1 : 0; | |
9927c688 JB |
216 | } |
217 | ||
218 | static int ses_set_locate(struct enclosure_device *edev, | |
219 | struct enclosure_component *ecomp, | |
220 | enum enclosure_component_setting val) | |
221 | { | |
691b4773 | 222 | unsigned char desc[4] = {0 }; |
9927c688 JB |
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 | { | |
691b4773 | 242 | unsigned char desc[4] = {0 }; |
9927c688 JB |
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 | ||
e0aae1a5 | 274 | #if 0 |
9927c688 JB |
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 | ||
ee959b00 | 280 | if (!scsi_is_sdev_device(edev->edev.parent)) |
9927c688 JB |
281 | return 0; |
282 | ||
ee959b00 | 283 | sdev = to_scsi_device(edev->edev.parent); |
9927c688 JB |
284 | |
285 | if (sdev->host != sed->shost) | |
286 | return 0; | |
287 | ||
288 | sed->edev = edev; | |
289 | return 1; | |
290 | } | |
e0aae1a5 | 291 | #endif /* 0 */ |
9927c688 JB |
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 | ||
21fab1d0 JB |
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; | |
8c3adc79 | 367 | int types = ses_dev->page1_num_types; |
21fab1d0 JB |
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; | |
21fab1d0 | 399 | } |
877a5597 JH |
400 | if (ses_dev->page10) |
401 | addl_desc_ptr = ses_dev->page10 + 8; | |
8c3adc79 | 402 | type_ptr = ses_dev->page1_types; |
21fab1d0 JB |
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 | ||
9927c688 JB |
448 | static void ses_match_to_enclosure(struct enclosure_device *edev, |
449 | struct scsi_device *sdev) | |
450 | { | |
40c3460f | 451 | unsigned char *buf; |
9927c688 | 452 | unsigned char *desc; |
40c3460f | 453 | unsigned int vpd_len; |
9927c688 JB |
454 | struct efd efd = { |
455 | .addr = 0, | |
456 | }; | |
9927c688 | 457 | |
e3deec09 JB |
458 | buf = kmalloc(INIT_ALLOC_SIZE, GFP_KERNEL); |
459 | if (!buf || scsi_get_vpd_page(sdev, 0x83, buf, INIT_ALLOC_SIZE)) | |
460 | goto free; | |
9927c688 | 461 | |
21fab1d0 JB |
462 | ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0); |
463 | ||
40c3460f | 464 | vpd_len = ((buf[2] << 8) | buf[3]) + 4; |
e3deec09 JB |
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; | |
671a99c8 | 469 | |
9927c688 | 470 | desc = buf + 4; |
671a99c8 | 471 | while (desc < buf + vpd_len) { |
9927c688 JB |
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 | ||
b3f1f9aa | 479 | if (piv && code_set == 1 && assoc == 1 |
9927c688 JB |
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 | ||
ee959b00 | 502 | static int ses_intf_add(struct device *cdev, |
9927c688 JB |
503 | struct class_interface *intf) |
504 | { | |
ee959b00 | 505 | struct scsi_device *sdev = to_scsi_device(cdev->parent); |
9927c688 | 506 | struct scsi_device *tmp_sdev; |
21fab1d0 | 507 | unsigned char *buf = NULL, *hdr_buf, *type_ptr; |
9927c688 JB |
508 | struct ses_device *ses_dev; |
509 | u32 result; | |
21fab1d0 | 510 | int i, types, len, components = 0; |
9927c688 | 511 | int err = -ENOMEM; |
8c3adc79 | 512 | int num_enclosures; |
9927c688 | 513 | struct enclosure_device *edev; |
7c46c20a | 514 | struct ses_component *scomp = NULL; |
9927c688 JB |
515 | |
516 | if (!scsi_device_enclosure(sdev)) { | |
517 | /* not an enclosure, but might be in one */ | |
163f52b6 JB |
518 | struct enclosure_device *prev = NULL; |
519 | ||
520 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
9927c688 | 521 | ses_match_to_enclosure(edev, sdev); |
163f52b6 | 522 | prev = edev; |
9927c688 JB |
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 | ||
9927c688 JB |
540 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
541 | buf = kzalloc(len, GFP_KERNEL); | |
542 | if (!buf) | |
543 | goto err_free; | |
544 | ||
9927c688 JB |
545 | result = ses_recv_diag(sdev, 1, buf, len); |
546 | if (result) | |
547 | goto recv_failed; | |
548 | ||
8c3adc79 | 549 | types = 0; |
9927c688 | 550 | |
8c3adc79 JB |
551 | /* we always have one main enclosure and the rest are referred |
552 | * to as secondary subenclosures */ | |
553 | num_enclosures = buf[1] + 1; | |
9927c688 | 554 | |
8c3adc79 JB |
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) { | |
9927c688 JB |
567 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || |
568 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
569 | components += type_ptr[1]; | |
570 | } | |
7c46c20a YL |
571 | ses_dev->page1 = buf; |
572 | ses_dev->page1_len = len; | |
573 | buf = NULL; | |
9927c688 JB |
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; | |
7c46c20a | 590 | buf = NULL; |
9927c688 JB |
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); | |
691b4773 YL |
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 | } | |
7c46c20a | 609 | scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL); |
9927c688 | 610 | if (!scomp) |
7c46c20a | 611 | goto err_free; |
9927c688 | 612 | |
71610f55 | 613 | edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev), |
9927c688 JB |
614 | components, &ses_enclosure_callbacks); |
615 | if (IS_ERR(edev)) { | |
616 | err = PTR_ERR(edev); | |
617 | goto err_free; | |
618 | } | |
619 | ||
9b3a6549 JL |
620 | kfree(hdr_buf); |
621 | ||
9927c688 JB |
622 | edev->scratch = ses_dev; |
623 | for (i = 0; i < components; i++) | |
7c46c20a | 624 | edev->component[i].scratch = scomp + i; |
9927c688 | 625 | |
21fab1d0 | 626 | ses_enclosure_data_process(edev, sdev, 1); |
9927c688 JB |
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); | |
7c46c20a | 644 | kfree(scomp); |
9927c688 JB |
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 | ||
43d8eb9c JB |
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) | |
9927c688 | 674 | { |
9927c688 JB |
675 | struct enclosure_device *edev; |
676 | struct ses_device *ses_dev; | |
677 | ||
163f52b6 | 678 | /* exact match to this enclosure */ |
43d8eb9c | 679 | edev = enclosure_find(&sdev->sdev_gendev, NULL); |
9927c688 JB |
680 | if (!edev) |
681 | return; | |
682 | ||
683 | ses_dev = edev->scratch; | |
684 | edev->scratch = NULL; | |
685 | ||
7c46c20a | 686 | kfree(ses_dev->page10); |
9927c688 JB |
687 | kfree(ses_dev->page1); |
688 | kfree(ses_dev->page2); | |
689 | kfree(ses_dev); | |
690 | ||
691 | kfree(edev->component[0].scratch); | |
692 | ||
ee959b00 | 693 | put_device(&edev->edev); |
9927c688 JB |
694 | enclosure_unregister(edev); |
695 | } | |
696 | ||
43d8eb9c JB |
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 | ||
9927c688 | 708 | static struct class_interface ses_interface = { |
ee959b00 TJ |
709 | .add_dev = ses_intf_add, |
710 | .remove_dev = ses_intf_remove, | |
9927c688 JB |
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"); |