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> | |
c38c007a | 28 | #include <asm/unaligned.h> |
9927c688 JB |
29 | |
30 | #include <scsi/scsi.h> | |
31 | #include <scsi/scsi_cmnd.h> | |
32 | #include <scsi/scsi_dbg.h> | |
33 | #include <scsi/scsi_device.h> | |
34 | #include <scsi/scsi_driver.h> | |
35 | #include <scsi/scsi_host.h> | |
36 | ||
37 | struct ses_device { | |
691b4773 | 38 | unsigned char *page1; |
8c3adc79 | 39 | unsigned char *page1_types; |
691b4773 YL |
40 | unsigned char *page2; |
41 | unsigned char *page10; | |
9927c688 | 42 | short page1_len; |
8c3adc79 | 43 | short page1_num_types; |
9927c688 JB |
44 | short page2_len; |
45 | short page10_len; | |
46 | }; | |
47 | ||
48 | struct ses_component { | |
49 | u64 addr; | |
50 | unsigned char *desc; | |
51 | }; | |
52 | ||
53 | static int ses_probe(struct device *dev) | |
54 | { | |
55 | struct scsi_device *sdev = to_scsi_device(dev); | |
56 | int err = -ENODEV; | |
57 | ||
58 | if (sdev->type != TYPE_ENCLOSURE) | |
59 | goto out; | |
60 | ||
61 | err = 0; | |
62 | sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n"); | |
63 | ||
64 | out: | |
65 | return err; | |
66 | } | |
67 | ||
c95e62ce | 68 | #define SES_TIMEOUT (30 * HZ) |
9927c688 JB |
69 | #define SES_RETRIES 3 |
70 | ||
71 | static int ses_recv_diag(struct scsi_device *sdev, int page_code, | |
72 | void *buf, int bufflen) | |
73 | { | |
691b4773 | 74 | unsigned char cmd[] = { |
9927c688 JB |
75 | RECEIVE_DIAGNOSTIC, |
76 | 1, /* Set PCV bit */ | |
77 | page_code, | |
78 | bufflen >> 8, | |
79 | bufflen & 0xff, | |
80 | 0 | |
81 | }; | |
82 | ||
83 | return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen, | |
f4f4e47e | 84 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
85 | } |
86 | ||
87 | static int ses_send_diag(struct scsi_device *sdev, int page_code, | |
88 | void *buf, int bufflen) | |
89 | { | |
90 | u32 result; | |
91 | ||
691b4773 | 92 | unsigned char cmd[] = { |
9927c688 JB |
93 | SEND_DIAGNOSTIC, |
94 | 0x10, /* Set PF bit */ | |
95 | 0, | |
96 | bufflen >> 8, | |
97 | bufflen & 0xff, | |
98 | 0 | |
99 | }; | |
100 | ||
101 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen, | |
f4f4e47e | 102 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
103 | if (result) |
104 | sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n", | |
105 | result); | |
106 | return result; | |
107 | } | |
108 | ||
109 | static int ses_set_page2_descriptor(struct enclosure_device *edev, | |
110 | struct enclosure_component *ecomp, | |
691b4773 | 111 | unsigned char *desc) |
9927c688 JB |
112 | { |
113 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 114 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 115 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 116 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 117 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 JB |
118 | |
119 | /* Clear everything */ | |
120 | memset(desc_ptr, 0, ses_dev->page2_len - 8); | |
8c3adc79 | 121 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
122 | for (j = 0; j < type_ptr[1]; j++) { |
123 | desc_ptr += 4; | |
124 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && | |
125 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
126 | continue; | |
127 | if (count++ == descriptor) { | |
128 | memcpy(desc_ptr, desc, 4); | |
129 | /* set select */ | |
130 | desc_ptr[0] |= 0x80; | |
131 | /* clear reserved, just in case */ | |
132 | desc_ptr[0] &= 0xf0; | |
133 | } | |
134 | } | |
135 | } | |
136 | ||
137 | return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); | |
138 | } | |
139 | ||
691b4773 | 140 | static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev, |
9927c688 JB |
141 | struct enclosure_component *ecomp) |
142 | { | |
143 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 144 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 145 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 146 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 147 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 JB |
148 | |
149 | ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); | |
150 | ||
8c3adc79 | 151 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
152 | for (j = 0; j < type_ptr[1]; j++) { |
153 | desc_ptr += 4; | |
154 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && | |
155 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
156 | continue; | |
157 | if (count++ == descriptor) | |
158 | return desc_ptr; | |
159 | } | |
160 | } | |
161 | return NULL; | |
162 | } | |
163 | ||
2a350cab DG |
164 | /* For device slot and array device slot elements, byte 3 bit 6 |
165 | * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this | |
166 | * code stands these bits are shifted 4 positions right so in | |
167 | * sysfs they will appear as bits 2 and 1 respectively. Strange. */ | |
9927c688 JB |
168 | static void ses_get_fault(struct enclosure_device *edev, |
169 | struct enclosure_component *ecomp) | |
170 | { | |
691b4773 | 171 | unsigned char *desc; |
9927c688 JB |
172 | |
173 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
174 | if (desc) |
175 | ecomp->fault = (desc[3] & 0x60) >> 4; | |
9927c688 JB |
176 | } |
177 | ||
178 | static int ses_set_fault(struct enclosure_device *edev, | |
179 | struct enclosure_component *ecomp, | |
180 | enum enclosure_component_setting val) | |
181 | { | |
691b4773 | 182 | unsigned char desc[4] = {0 }; |
9927c688 JB |
183 | |
184 | switch (val) { | |
185 | case ENCLOSURE_SETTING_DISABLED: | |
186 | /* zero is disabled */ | |
187 | break; | |
188 | case ENCLOSURE_SETTING_ENABLED: | |
2a350cab | 189 | desc[3] = 0x20; |
9927c688 JB |
190 | break; |
191 | default: | |
192 | /* SES doesn't do the SGPIO blink settings */ | |
193 | return -EINVAL; | |
194 | } | |
195 | ||
196 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
197 | } | |
198 | ||
199 | static void ses_get_status(struct enclosure_device *edev, | |
200 | struct enclosure_component *ecomp) | |
201 | { | |
691b4773 | 202 | unsigned char *desc; |
9927c688 JB |
203 | |
204 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
205 | if (desc) |
206 | ecomp->status = (desc[0] & 0x0f); | |
9927c688 JB |
207 | } |
208 | ||
209 | static void ses_get_locate(struct enclosure_device *edev, | |
210 | struct enclosure_component *ecomp) | |
211 | { | |
691b4773 | 212 | unsigned char *desc; |
9927c688 JB |
213 | |
214 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
215 | if (desc) |
216 | ecomp->locate = (desc[2] & 0x02) ? 1 : 0; | |
9927c688 JB |
217 | } |
218 | ||
219 | static int ses_set_locate(struct enclosure_device *edev, | |
220 | struct enclosure_component *ecomp, | |
221 | enum enclosure_component_setting val) | |
222 | { | |
691b4773 | 223 | unsigned char desc[4] = {0 }; |
9927c688 JB |
224 | |
225 | switch (val) { | |
226 | case ENCLOSURE_SETTING_DISABLED: | |
227 | /* zero is disabled */ | |
228 | break; | |
229 | case ENCLOSURE_SETTING_ENABLED: | |
230 | desc[2] = 0x02; | |
231 | break; | |
232 | default: | |
233 | /* SES doesn't do the SGPIO blink settings */ | |
234 | return -EINVAL; | |
235 | } | |
236 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
237 | } | |
238 | ||
239 | static int ses_set_active(struct enclosure_device *edev, | |
240 | struct enclosure_component *ecomp, | |
241 | enum enclosure_component_setting val) | |
242 | { | |
691b4773 | 243 | unsigned char desc[4] = {0 }; |
9927c688 JB |
244 | |
245 | switch (val) { | |
246 | case ENCLOSURE_SETTING_DISABLED: | |
247 | /* zero is disabled */ | |
248 | ecomp->active = 0; | |
249 | break; | |
250 | case ENCLOSURE_SETTING_ENABLED: | |
251 | desc[2] = 0x80; | |
252 | ecomp->active = 1; | |
253 | break; | |
254 | default: | |
255 | /* SES doesn't do the SGPIO blink settings */ | |
256 | return -EINVAL; | |
257 | } | |
258 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
259 | } | |
260 | ||
261 | static struct enclosure_component_callbacks ses_enclosure_callbacks = { | |
262 | .get_fault = ses_get_fault, | |
263 | .set_fault = ses_set_fault, | |
264 | .get_status = ses_get_status, | |
265 | .get_locate = ses_get_locate, | |
266 | .set_locate = ses_set_locate, | |
267 | .set_active = ses_set_active, | |
268 | }; | |
269 | ||
270 | struct ses_host_edev { | |
271 | struct Scsi_Host *shost; | |
272 | struct enclosure_device *edev; | |
273 | }; | |
274 | ||
e0aae1a5 | 275 | #if 0 |
9927c688 JB |
276 | int ses_match_host(struct enclosure_device *edev, void *data) |
277 | { | |
278 | struct ses_host_edev *sed = data; | |
279 | struct scsi_device *sdev; | |
280 | ||
ee959b00 | 281 | if (!scsi_is_sdev_device(edev->edev.parent)) |
9927c688 JB |
282 | return 0; |
283 | ||
ee959b00 | 284 | sdev = to_scsi_device(edev->edev.parent); |
9927c688 JB |
285 | |
286 | if (sdev->host != sed->shost) | |
287 | return 0; | |
288 | ||
289 | sed->edev = edev; | |
290 | return 1; | |
291 | } | |
e0aae1a5 | 292 | #endif /* 0 */ |
9927c688 JB |
293 | |
294 | static void ses_process_descriptor(struct enclosure_component *ecomp, | |
295 | unsigned char *desc) | |
296 | { | |
297 | int eip = desc[0] & 0x10; | |
298 | int invalid = desc[0] & 0x80; | |
299 | enum scsi_protocol proto = desc[0] & 0x0f; | |
300 | u64 addr = 0; | |
301 | struct ses_component *scomp = ecomp->scratch; | |
302 | unsigned char *d; | |
303 | ||
304 | scomp->desc = desc; | |
305 | ||
306 | if (invalid) | |
307 | return; | |
308 | ||
309 | switch (proto) { | |
310 | case SCSI_PROTOCOL_SAS: | |
311 | if (eip) | |
312 | d = desc + 8; | |
313 | else | |
314 | d = desc + 4; | |
315 | /* only take the phy0 addr */ | |
316 | addr = (u64)d[12] << 56 | | |
317 | (u64)d[13] << 48 | | |
318 | (u64)d[14] << 40 | | |
319 | (u64)d[15] << 32 | | |
320 | (u64)d[16] << 24 | | |
321 | (u64)d[17] << 16 | | |
322 | (u64)d[18] << 8 | | |
323 | (u64)d[19]; | |
324 | break; | |
325 | default: | |
326 | /* FIXME: Need to add more protocols than just SAS */ | |
327 | break; | |
328 | } | |
329 | scomp->addr = addr; | |
330 | } | |
331 | ||
332 | struct efd { | |
333 | u64 addr; | |
334 | struct device *dev; | |
335 | }; | |
336 | ||
337 | static int ses_enclosure_find_by_addr(struct enclosure_device *edev, | |
338 | void *data) | |
339 | { | |
340 | struct efd *efd = data; | |
341 | int i; | |
342 | struct ses_component *scomp; | |
343 | ||
344 | if (!edev->component[0].scratch) | |
345 | return 0; | |
346 | ||
347 | for (i = 0; i < edev->components; i++) { | |
348 | scomp = edev->component[i].scratch; | |
349 | if (scomp->addr != efd->addr) | |
350 | continue; | |
351 | ||
15a0fbbc DW |
352 | if (enclosure_add_device(edev, i, efd->dev) == 0) |
353 | kobject_uevent(&efd->dev->kobj, KOBJ_CHANGE); | |
9927c688 JB |
354 | return 1; |
355 | } | |
356 | return 0; | |
357 | } | |
358 | ||
21fab1d0 JB |
359 | #define INIT_ALLOC_SIZE 32 |
360 | ||
361 | static void ses_enclosure_data_process(struct enclosure_device *edev, | |
362 | struct scsi_device *sdev, | |
363 | int create) | |
364 | { | |
365 | u32 result; | |
366 | unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL; | |
367 | int i, j, page7_len, len, components; | |
368 | struct ses_device *ses_dev = edev->scratch; | |
8c3adc79 | 369 | int types = ses_dev->page1_num_types; |
21fab1d0 JB |
370 | unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); |
371 | ||
372 | if (!hdr_buf) | |
373 | goto simple_populate; | |
374 | ||
375 | /* re-read page 10 */ | |
376 | if (ses_dev->page10) | |
377 | ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len); | |
378 | /* Page 7 for the descriptors is optional */ | |
379 | result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE); | |
380 | if (result) | |
381 | goto simple_populate; | |
382 | ||
383 | page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
384 | /* add 1 for trailing '\0' we'll use */ | |
385 | buf = kzalloc(len + 1, GFP_KERNEL); | |
386 | if (!buf) | |
387 | goto simple_populate; | |
388 | result = ses_recv_diag(sdev, 7, buf, len); | |
389 | if (result) { | |
390 | simple_populate: | |
391 | kfree(buf); | |
392 | buf = NULL; | |
393 | desc_ptr = NULL; | |
394 | len = 0; | |
395 | page7_len = 0; | |
396 | } else { | |
397 | desc_ptr = buf + 8; | |
398 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
399 | /* skip past overall descriptor */ | |
400 | desc_ptr += len + 4; | |
21fab1d0 | 401 | } |
877a5597 JH |
402 | if (ses_dev->page10) |
403 | addl_desc_ptr = ses_dev->page10 + 8; | |
8c3adc79 | 404 | type_ptr = ses_dev->page1_types; |
21fab1d0 JB |
405 | components = 0; |
406 | for (i = 0; i < types; i++, type_ptr += 4) { | |
407 | for (j = 0; j < type_ptr[1]; j++) { | |
408 | char *name = NULL; | |
409 | struct enclosure_component *ecomp; | |
410 | ||
411 | if (desc_ptr) { | |
412 | if (desc_ptr >= buf + page7_len) { | |
413 | desc_ptr = NULL; | |
414 | } else { | |
415 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
416 | desc_ptr += 4; | |
417 | /* Add trailing zero - pushes into | |
418 | * reserved space */ | |
419 | desc_ptr[len] = '\0'; | |
420 | name = desc_ptr; | |
421 | } | |
422 | } | |
423 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
424 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) { | |
425 | ||
426 | if (create) | |
ed09dcc8 DW |
427 | ecomp = enclosure_component_alloc( |
428 | edev, | |
429 | components++, | |
430 | type_ptr[0], | |
431 | name); | |
21fab1d0 JB |
432 | else |
433 | ecomp = &edev->component[components++]; | |
434 | ||
ed09dcc8 DW |
435 | if (!IS_ERR(ecomp)) { |
436 | if (addl_desc_ptr) | |
437 | ses_process_descriptor( | |
438 | ecomp, | |
439 | addl_desc_ptr); | |
440 | if (create) | |
441 | enclosure_component_register( | |
442 | ecomp); | |
443 | } | |
21fab1d0 JB |
444 | } |
445 | if (desc_ptr) | |
446 | desc_ptr += len; | |
447 | ||
448 | if (addl_desc_ptr) | |
449 | addl_desc_ptr += addl_desc_ptr[1] + 2; | |
450 | ||
451 | } | |
452 | } | |
453 | kfree(buf); | |
454 | kfree(hdr_buf); | |
455 | } | |
456 | ||
9927c688 JB |
457 | static void ses_match_to_enclosure(struct enclosure_device *edev, |
458 | struct scsi_device *sdev) | |
459 | { | |
9927c688 | 460 | unsigned char *desc; |
9927c688 JB |
461 | struct efd efd = { |
462 | .addr = 0, | |
463 | }; | |
9927c688 | 464 | |
21fab1d0 JB |
465 | ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0); |
466 | ||
c38c007a HR |
467 | if (!sdev->vpd_pg83_len) |
468 | return; | |
671a99c8 | 469 | |
c38c007a HR |
470 | desc = sdev->vpd_pg83 + 4; |
471 | while (desc < sdev->vpd_pg83 + sdev->vpd_pg83_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 | 480 | && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8) |
c38c007a | 481 | efd.addr = get_unaligned_be64(&desc[4]); |
9927c688 JB |
482 | |
483 | desc += len + 4; | |
484 | } | |
c38c007a HR |
485 | if (efd.addr) { |
486 | efd.dev = &sdev->sdev_gendev; | |
9927c688 | 487 | |
c38c007a HR |
488 | enclosure_for_each_device(ses_enclosure_find_by_addr, &efd); |
489 | } | |
9927c688 JB |
490 | } |
491 | ||
ee959b00 | 492 | static int ses_intf_add(struct device *cdev, |
9927c688 JB |
493 | struct class_interface *intf) |
494 | { | |
ee959b00 | 495 | struct scsi_device *sdev = to_scsi_device(cdev->parent); |
9927c688 | 496 | struct scsi_device *tmp_sdev; |
21fab1d0 | 497 | unsigned char *buf = NULL, *hdr_buf, *type_ptr; |
9927c688 JB |
498 | struct ses_device *ses_dev; |
499 | u32 result; | |
21fab1d0 | 500 | int i, types, len, components = 0; |
9927c688 | 501 | int err = -ENOMEM; |
8c3adc79 | 502 | int num_enclosures; |
9927c688 | 503 | struct enclosure_device *edev; |
7c46c20a | 504 | struct ses_component *scomp = NULL; |
9927c688 JB |
505 | |
506 | if (!scsi_device_enclosure(sdev)) { | |
507 | /* not an enclosure, but might be in one */ | |
163f52b6 JB |
508 | struct enclosure_device *prev = NULL; |
509 | ||
510 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
9927c688 | 511 | ses_match_to_enclosure(edev, sdev); |
163f52b6 | 512 | prev = edev; |
9927c688 JB |
513 | } |
514 | return -ENODEV; | |
515 | } | |
516 | ||
517 | /* TYPE_ENCLOSURE prints a message in probe */ | |
518 | if (sdev->type != TYPE_ENCLOSURE) | |
519 | sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n"); | |
520 | ||
521 | ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL); | |
522 | hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); | |
523 | if (!hdr_buf || !ses_dev) | |
524 | goto err_init_free; | |
525 | ||
526 | result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE); | |
527 | if (result) | |
528 | goto recv_failed; | |
529 | ||
9927c688 JB |
530 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
531 | buf = kzalloc(len, GFP_KERNEL); | |
532 | if (!buf) | |
533 | goto err_free; | |
534 | ||
9927c688 JB |
535 | result = ses_recv_diag(sdev, 1, buf, len); |
536 | if (result) | |
537 | goto recv_failed; | |
538 | ||
8c3adc79 | 539 | types = 0; |
9927c688 | 540 | |
8c3adc79 JB |
541 | /* we always have one main enclosure and the rest are referred |
542 | * to as secondary subenclosures */ | |
543 | num_enclosures = buf[1] + 1; | |
9927c688 | 544 | |
8c3adc79 JB |
545 | /* begin at the enclosure descriptor */ |
546 | type_ptr = buf + 8; | |
547 | /* skip all the enclosure descriptors */ | |
548 | for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) { | |
549 | types += type_ptr[2]; | |
550 | type_ptr += type_ptr[3] + 4; | |
551 | } | |
552 | ||
553 | ses_dev->page1_types = type_ptr; | |
554 | ses_dev->page1_num_types = types; | |
555 | ||
556 | for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) { | |
9927c688 JB |
557 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || |
558 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
559 | components += type_ptr[1]; | |
560 | } | |
7c46c20a YL |
561 | ses_dev->page1 = buf; |
562 | ses_dev->page1_len = len; | |
563 | buf = NULL; | |
9927c688 JB |
564 | |
565 | result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE); | |
566 | if (result) | |
567 | goto recv_failed; | |
568 | ||
569 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
570 | buf = kzalloc(len, GFP_KERNEL); | |
571 | if (!buf) | |
572 | goto err_free; | |
573 | ||
574 | /* make sure getting page 2 actually works */ | |
575 | result = ses_recv_diag(sdev, 2, buf, len); | |
576 | if (result) | |
577 | goto recv_failed; | |
578 | ses_dev->page2 = buf; | |
579 | ses_dev->page2_len = len; | |
7c46c20a | 580 | buf = NULL; |
9927c688 JB |
581 | |
582 | /* The additional information page --- allows us | |
583 | * to match up the devices */ | |
584 | result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE); | |
691b4773 YL |
585 | if (!result) { |
586 | ||
587 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
588 | buf = kzalloc(len, GFP_KERNEL); | |
589 | if (!buf) | |
590 | goto err_free; | |
591 | ||
592 | result = ses_recv_diag(sdev, 10, buf, len); | |
593 | if (result) | |
594 | goto recv_failed; | |
595 | ses_dev->page10 = buf; | |
596 | ses_dev->page10_len = len; | |
597 | buf = NULL; | |
598 | } | |
7c46c20a | 599 | scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL); |
9927c688 | 600 | if (!scomp) |
7c46c20a | 601 | goto err_free; |
9927c688 | 602 | |
71610f55 | 603 | edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev), |
9927c688 JB |
604 | components, &ses_enclosure_callbacks); |
605 | if (IS_ERR(edev)) { | |
606 | err = PTR_ERR(edev); | |
607 | goto err_free; | |
608 | } | |
609 | ||
9b3a6549 JL |
610 | kfree(hdr_buf); |
611 | ||
9927c688 JB |
612 | edev->scratch = ses_dev; |
613 | for (i = 0; i < components; i++) | |
7c46c20a | 614 | edev->component[i].scratch = scomp + i; |
9927c688 | 615 | |
21fab1d0 | 616 | ses_enclosure_data_process(edev, sdev, 1); |
9927c688 JB |
617 | |
618 | /* see if there are any devices matching before | |
619 | * we found the enclosure */ | |
620 | shost_for_each_device(tmp_sdev, sdev->host) { | |
621 | if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) | |
622 | continue; | |
623 | ses_match_to_enclosure(edev, tmp_sdev); | |
624 | } | |
625 | ||
626 | return 0; | |
627 | ||
628 | recv_failed: | |
629 | sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n", | |
630 | result); | |
631 | err = -ENODEV; | |
632 | err_free: | |
633 | kfree(buf); | |
7c46c20a | 634 | kfree(scomp); |
9927c688 JB |
635 | kfree(ses_dev->page10); |
636 | kfree(ses_dev->page2); | |
637 | kfree(ses_dev->page1); | |
638 | err_init_free: | |
639 | kfree(ses_dev); | |
640 | kfree(hdr_buf); | |
641 | sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err); | |
642 | return err; | |
643 | } | |
644 | ||
645 | static int ses_remove(struct device *dev) | |
646 | { | |
647 | return 0; | |
648 | } | |
649 | ||
43d8eb9c JB |
650 | static void ses_intf_remove_component(struct scsi_device *sdev) |
651 | { | |
652 | struct enclosure_device *edev, *prev = NULL; | |
653 | ||
654 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
655 | prev = edev; | |
656 | if (!enclosure_remove_device(edev, &sdev->sdev_gendev)) | |
657 | break; | |
658 | } | |
659 | if (edev) | |
660 | put_device(&edev->edev); | |
661 | } | |
662 | ||
663 | static void ses_intf_remove_enclosure(struct scsi_device *sdev) | |
9927c688 | 664 | { |
9927c688 JB |
665 | struct enclosure_device *edev; |
666 | struct ses_device *ses_dev; | |
667 | ||
163f52b6 | 668 | /* exact match to this enclosure */ |
43d8eb9c | 669 | edev = enclosure_find(&sdev->sdev_gendev, NULL); |
9927c688 JB |
670 | if (!edev) |
671 | return; | |
672 | ||
673 | ses_dev = edev->scratch; | |
674 | edev->scratch = NULL; | |
675 | ||
7c46c20a | 676 | kfree(ses_dev->page10); |
9927c688 JB |
677 | kfree(ses_dev->page1); |
678 | kfree(ses_dev->page2); | |
679 | kfree(ses_dev); | |
680 | ||
681 | kfree(edev->component[0].scratch); | |
682 | ||
ee959b00 | 683 | put_device(&edev->edev); |
9927c688 JB |
684 | enclosure_unregister(edev); |
685 | } | |
686 | ||
43d8eb9c JB |
687 | static void ses_intf_remove(struct device *cdev, |
688 | struct class_interface *intf) | |
689 | { | |
690 | struct scsi_device *sdev = to_scsi_device(cdev->parent); | |
691 | ||
692 | if (!scsi_device_enclosure(sdev)) | |
693 | ses_intf_remove_component(sdev); | |
694 | else | |
695 | ses_intf_remove_enclosure(sdev); | |
696 | } | |
697 | ||
9927c688 | 698 | static struct class_interface ses_interface = { |
ee959b00 TJ |
699 | .add_dev = ses_intf_add, |
700 | .remove_dev = ses_intf_remove, | |
9927c688 JB |
701 | }; |
702 | ||
703 | static struct scsi_driver ses_template = { | |
9927c688 JB |
704 | .gendrv = { |
705 | .name = "ses", | |
3af6b352 | 706 | .owner = THIS_MODULE, |
9927c688 JB |
707 | .probe = ses_probe, |
708 | .remove = ses_remove, | |
709 | }, | |
710 | }; | |
711 | ||
712 | static int __init ses_init(void) | |
713 | { | |
714 | int err; | |
715 | ||
716 | err = scsi_register_interface(&ses_interface); | |
717 | if (err) | |
718 | return err; | |
719 | ||
720 | err = scsi_register_driver(&ses_template.gendrv); | |
721 | if (err) | |
722 | goto out_unreg; | |
723 | ||
724 | return 0; | |
725 | ||
726 | out_unreg: | |
727 | scsi_unregister_interface(&ses_interface); | |
728 | return err; | |
729 | } | |
730 | ||
731 | static void __exit ses_exit(void) | |
732 | { | |
733 | scsi_unregister_driver(&ses_template.gendrv); | |
734 | scsi_unregister_interface(&ses_interface); | |
735 | } | |
736 | ||
737 | module_init(ses_init); | |
738 | module_exit(ses_exit); | |
739 | ||
740 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE); | |
741 | ||
742 | MODULE_AUTHOR("James Bottomley"); | |
743 | MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver"); | |
744 | MODULE_LICENSE("GPL v2"); |