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; | |
9927c688 JB |
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 | ||
967f7bab DW |
260 | static int ses_show_id(struct enclosure_device *edev, char *buf) |
261 | { | |
262 | struct ses_device *ses_dev = edev->scratch; | |
263 | unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4); | |
264 | ||
265 | return sprintf(buf, "%#llx\n", id); | |
266 | } | |
267 | ||
9927c688 JB |
268 | static struct enclosure_component_callbacks ses_enclosure_callbacks = { |
269 | .get_fault = ses_get_fault, | |
270 | .set_fault = ses_set_fault, | |
271 | .get_status = ses_get_status, | |
272 | .get_locate = ses_get_locate, | |
273 | .set_locate = ses_set_locate, | |
274 | .set_active = ses_set_active, | |
967f7bab | 275 | .show_id = ses_show_id, |
9927c688 JB |
276 | }; |
277 | ||
278 | struct ses_host_edev { | |
279 | struct Scsi_Host *shost; | |
280 | struct enclosure_device *edev; | |
281 | }; | |
282 | ||
e0aae1a5 | 283 | #if 0 |
9927c688 JB |
284 | int ses_match_host(struct enclosure_device *edev, void *data) |
285 | { | |
286 | struct ses_host_edev *sed = data; | |
287 | struct scsi_device *sdev; | |
288 | ||
ee959b00 | 289 | if (!scsi_is_sdev_device(edev->edev.parent)) |
9927c688 JB |
290 | return 0; |
291 | ||
ee959b00 | 292 | sdev = to_scsi_device(edev->edev.parent); |
9927c688 JB |
293 | |
294 | if (sdev->host != sed->shost) | |
295 | return 0; | |
296 | ||
297 | sed->edev = edev; | |
298 | return 1; | |
299 | } | |
e0aae1a5 | 300 | #endif /* 0 */ |
9927c688 JB |
301 | |
302 | static void ses_process_descriptor(struct enclosure_component *ecomp, | |
303 | unsigned char *desc) | |
304 | { | |
305 | int eip = desc[0] & 0x10; | |
306 | int invalid = desc[0] & 0x80; | |
307 | enum scsi_protocol proto = desc[0] & 0x0f; | |
308 | u64 addr = 0; | |
921ce7f5 | 309 | int slot = -1; |
9927c688 JB |
310 | struct ses_component *scomp = ecomp->scratch; |
311 | unsigned char *d; | |
312 | ||
9927c688 JB |
313 | if (invalid) |
314 | return; | |
315 | ||
316 | switch (proto) { | |
921ce7f5 DW |
317 | case SCSI_PROTOCOL_FCP: |
318 | if (eip) { | |
319 | d = desc + 4; | |
320 | slot = d[3]; | |
321 | } | |
322 | break; | |
9927c688 | 323 | case SCSI_PROTOCOL_SAS: |
921ce7f5 DW |
324 | if (eip) { |
325 | d = desc + 4; | |
326 | slot = d[3]; | |
9927c688 | 327 | d = desc + 8; |
921ce7f5 | 328 | } else |
9927c688 JB |
329 | d = desc + 4; |
330 | /* only take the phy0 addr */ | |
331 | addr = (u64)d[12] << 56 | | |
332 | (u64)d[13] << 48 | | |
333 | (u64)d[14] << 40 | | |
334 | (u64)d[15] << 32 | | |
335 | (u64)d[16] << 24 | | |
336 | (u64)d[17] << 16 | | |
337 | (u64)d[18] << 8 | | |
338 | (u64)d[19]; | |
339 | break; | |
340 | default: | |
341 | /* FIXME: Need to add more protocols than just SAS */ | |
342 | break; | |
343 | } | |
921ce7f5 | 344 | ecomp->slot = slot; |
9927c688 JB |
345 | scomp->addr = addr; |
346 | } | |
347 | ||
348 | struct efd { | |
349 | u64 addr; | |
350 | struct device *dev; | |
351 | }; | |
352 | ||
353 | static int ses_enclosure_find_by_addr(struct enclosure_device *edev, | |
354 | void *data) | |
355 | { | |
356 | struct efd *efd = data; | |
357 | int i; | |
358 | struct ses_component *scomp; | |
359 | ||
360 | if (!edev->component[0].scratch) | |
361 | return 0; | |
362 | ||
363 | for (i = 0; i < edev->components; i++) { | |
364 | scomp = edev->component[i].scratch; | |
365 | if (scomp->addr != efd->addr) | |
366 | continue; | |
367 | ||
15a0fbbc DW |
368 | if (enclosure_add_device(edev, i, efd->dev) == 0) |
369 | kobject_uevent(&efd->dev->kobj, KOBJ_CHANGE); | |
9927c688 JB |
370 | return 1; |
371 | } | |
372 | return 0; | |
373 | } | |
374 | ||
21fab1d0 JB |
375 | #define INIT_ALLOC_SIZE 32 |
376 | ||
377 | static void ses_enclosure_data_process(struct enclosure_device *edev, | |
378 | struct scsi_device *sdev, | |
379 | int create) | |
380 | { | |
381 | u32 result; | |
382 | unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL; | |
383 | int i, j, page7_len, len, components; | |
384 | struct ses_device *ses_dev = edev->scratch; | |
8c3adc79 | 385 | int types = ses_dev->page1_num_types; |
21fab1d0 JB |
386 | unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); |
387 | ||
388 | if (!hdr_buf) | |
389 | goto simple_populate; | |
390 | ||
391 | /* re-read page 10 */ | |
392 | if (ses_dev->page10) | |
393 | ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len); | |
394 | /* Page 7 for the descriptors is optional */ | |
395 | result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE); | |
396 | if (result) | |
397 | goto simple_populate; | |
398 | ||
399 | page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
400 | /* add 1 for trailing '\0' we'll use */ | |
401 | buf = kzalloc(len + 1, GFP_KERNEL); | |
402 | if (!buf) | |
403 | goto simple_populate; | |
404 | result = ses_recv_diag(sdev, 7, buf, len); | |
405 | if (result) { | |
406 | simple_populate: | |
407 | kfree(buf); | |
408 | buf = NULL; | |
409 | desc_ptr = NULL; | |
410 | len = 0; | |
411 | page7_len = 0; | |
412 | } else { | |
413 | desc_ptr = buf + 8; | |
414 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
415 | /* skip past overall descriptor */ | |
416 | desc_ptr += len + 4; | |
21fab1d0 | 417 | } |
877a5597 JH |
418 | if (ses_dev->page10) |
419 | addl_desc_ptr = ses_dev->page10 + 8; | |
8c3adc79 | 420 | type_ptr = ses_dev->page1_types; |
21fab1d0 JB |
421 | components = 0; |
422 | for (i = 0; i < types; i++, type_ptr += 4) { | |
423 | for (j = 0; j < type_ptr[1]; j++) { | |
424 | char *name = NULL; | |
425 | struct enclosure_component *ecomp; | |
426 | ||
427 | if (desc_ptr) { | |
428 | if (desc_ptr >= buf + page7_len) { | |
429 | desc_ptr = NULL; | |
430 | } else { | |
431 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
432 | desc_ptr += 4; | |
433 | /* Add trailing zero - pushes into | |
434 | * reserved space */ | |
435 | desc_ptr[len] = '\0'; | |
436 | name = desc_ptr; | |
437 | } | |
438 | } | |
439 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
440 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) { | |
441 | ||
442 | if (create) | |
ed09dcc8 DW |
443 | ecomp = enclosure_component_alloc( |
444 | edev, | |
445 | components++, | |
446 | type_ptr[0], | |
447 | name); | |
21fab1d0 JB |
448 | else |
449 | ecomp = &edev->component[components++]; | |
450 | ||
ed09dcc8 DW |
451 | if (!IS_ERR(ecomp)) { |
452 | if (addl_desc_ptr) | |
453 | ses_process_descriptor( | |
454 | ecomp, | |
455 | addl_desc_ptr); | |
456 | if (create) | |
457 | enclosure_component_register( | |
458 | ecomp); | |
459 | } | |
21fab1d0 JB |
460 | } |
461 | if (desc_ptr) | |
462 | desc_ptr += len; | |
463 | ||
464 | if (addl_desc_ptr) | |
465 | addl_desc_ptr += addl_desc_ptr[1] + 2; | |
466 | ||
467 | } | |
468 | } | |
469 | kfree(buf); | |
470 | kfree(hdr_buf); | |
471 | } | |
472 | ||
9927c688 JB |
473 | static void ses_match_to_enclosure(struct enclosure_device *edev, |
474 | struct scsi_device *sdev) | |
475 | { | |
9927c688 | 476 | unsigned char *desc; |
9927c688 JB |
477 | struct efd efd = { |
478 | .addr = 0, | |
479 | }; | |
9927c688 | 480 | |
21fab1d0 JB |
481 | ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0); |
482 | ||
c38c007a HR |
483 | if (!sdev->vpd_pg83_len) |
484 | return; | |
671a99c8 | 485 | |
c38c007a HR |
486 | desc = sdev->vpd_pg83 + 4; |
487 | while (desc < sdev->vpd_pg83 + sdev->vpd_pg83_len) { | |
9927c688 JB |
488 | enum scsi_protocol proto = desc[0] >> 4; |
489 | u8 code_set = desc[0] & 0x0f; | |
490 | u8 piv = desc[1] & 0x80; | |
491 | u8 assoc = (desc[1] & 0x30) >> 4; | |
492 | u8 type = desc[1] & 0x0f; | |
493 | u8 len = desc[3]; | |
494 | ||
b3f1f9aa | 495 | if (piv && code_set == 1 && assoc == 1 |
9927c688 | 496 | && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8) |
c38c007a | 497 | efd.addr = get_unaligned_be64(&desc[4]); |
9927c688 JB |
498 | |
499 | desc += len + 4; | |
500 | } | |
c38c007a HR |
501 | if (efd.addr) { |
502 | efd.dev = &sdev->sdev_gendev; | |
9927c688 | 503 | |
c38c007a HR |
504 | enclosure_for_each_device(ses_enclosure_find_by_addr, &efd); |
505 | } | |
9927c688 JB |
506 | } |
507 | ||
ee959b00 | 508 | static int ses_intf_add(struct device *cdev, |
9927c688 JB |
509 | struct class_interface *intf) |
510 | { | |
ee959b00 | 511 | struct scsi_device *sdev = to_scsi_device(cdev->parent); |
9927c688 | 512 | struct scsi_device *tmp_sdev; |
21fab1d0 | 513 | unsigned char *buf = NULL, *hdr_buf, *type_ptr; |
9927c688 JB |
514 | struct ses_device *ses_dev; |
515 | u32 result; | |
21fab1d0 | 516 | int i, types, len, components = 0; |
9927c688 | 517 | int err = -ENOMEM; |
8c3adc79 | 518 | int num_enclosures; |
9927c688 | 519 | struct enclosure_device *edev; |
7c46c20a | 520 | struct ses_component *scomp = NULL; |
9927c688 JB |
521 | |
522 | if (!scsi_device_enclosure(sdev)) { | |
523 | /* not an enclosure, but might be in one */ | |
163f52b6 JB |
524 | struct enclosure_device *prev = NULL; |
525 | ||
526 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
9927c688 | 527 | ses_match_to_enclosure(edev, sdev); |
163f52b6 | 528 | prev = edev; |
9927c688 JB |
529 | } |
530 | return -ENODEV; | |
531 | } | |
532 | ||
533 | /* TYPE_ENCLOSURE prints a message in probe */ | |
534 | if (sdev->type != TYPE_ENCLOSURE) | |
535 | sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n"); | |
536 | ||
537 | ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL); | |
538 | hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); | |
539 | if (!hdr_buf || !ses_dev) | |
540 | goto err_init_free; | |
541 | ||
542 | result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE); | |
543 | if (result) | |
544 | goto recv_failed; | |
545 | ||
9927c688 JB |
546 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
547 | buf = kzalloc(len, GFP_KERNEL); | |
548 | if (!buf) | |
549 | goto err_free; | |
550 | ||
9927c688 JB |
551 | result = ses_recv_diag(sdev, 1, buf, len); |
552 | if (result) | |
553 | goto recv_failed; | |
554 | ||
8c3adc79 | 555 | types = 0; |
9927c688 | 556 | |
8c3adc79 JB |
557 | /* we always have one main enclosure and the rest are referred |
558 | * to as secondary subenclosures */ | |
559 | num_enclosures = buf[1] + 1; | |
9927c688 | 560 | |
8c3adc79 JB |
561 | /* begin at the enclosure descriptor */ |
562 | type_ptr = buf + 8; | |
563 | /* skip all the enclosure descriptors */ | |
564 | for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) { | |
565 | types += type_ptr[2]; | |
566 | type_ptr += type_ptr[3] + 4; | |
567 | } | |
568 | ||
569 | ses_dev->page1_types = type_ptr; | |
570 | ses_dev->page1_num_types = types; | |
571 | ||
572 | for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) { | |
9927c688 JB |
573 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || |
574 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
575 | components += type_ptr[1]; | |
576 | } | |
7c46c20a YL |
577 | ses_dev->page1 = buf; |
578 | ses_dev->page1_len = len; | |
579 | buf = NULL; | |
9927c688 JB |
580 | |
581 | result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE); | |
582 | if (result) | |
583 | goto recv_failed; | |
584 | ||
585 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
586 | buf = kzalloc(len, GFP_KERNEL); | |
587 | if (!buf) | |
588 | goto err_free; | |
589 | ||
590 | /* make sure getting page 2 actually works */ | |
591 | result = ses_recv_diag(sdev, 2, buf, len); | |
592 | if (result) | |
593 | goto recv_failed; | |
594 | ses_dev->page2 = buf; | |
595 | ses_dev->page2_len = len; | |
7c46c20a | 596 | buf = NULL; |
9927c688 JB |
597 | |
598 | /* The additional information page --- allows us | |
599 | * to match up the devices */ | |
600 | result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE); | |
691b4773 YL |
601 | if (!result) { |
602 | ||
603 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
604 | buf = kzalloc(len, GFP_KERNEL); | |
605 | if (!buf) | |
606 | goto err_free; | |
607 | ||
608 | result = ses_recv_diag(sdev, 10, buf, len); | |
609 | if (result) | |
610 | goto recv_failed; | |
611 | ses_dev->page10 = buf; | |
612 | ses_dev->page10_len = len; | |
613 | buf = NULL; | |
614 | } | |
7c46c20a | 615 | scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL); |
9927c688 | 616 | if (!scomp) |
7c46c20a | 617 | goto err_free; |
9927c688 | 618 | |
71610f55 | 619 | edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev), |
9927c688 JB |
620 | components, &ses_enclosure_callbacks); |
621 | if (IS_ERR(edev)) { | |
622 | err = PTR_ERR(edev); | |
623 | goto err_free; | |
624 | } | |
625 | ||
9b3a6549 JL |
626 | kfree(hdr_buf); |
627 | ||
9927c688 JB |
628 | edev->scratch = ses_dev; |
629 | for (i = 0; i < components; i++) | |
7c46c20a | 630 | edev->component[i].scratch = scomp + i; |
9927c688 | 631 | |
21fab1d0 | 632 | ses_enclosure_data_process(edev, sdev, 1); |
9927c688 JB |
633 | |
634 | /* see if there are any devices matching before | |
635 | * we found the enclosure */ | |
636 | shost_for_each_device(tmp_sdev, sdev->host) { | |
637 | if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) | |
638 | continue; | |
639 | ses_match_to_enclosure(edev, tmp_sdev); | |
640 | } | |
641 | ||
642 | return 0; | |
643 | ||
644 | recv_failed: | |
645 | sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n", | |
646 | result); | |
647 | err = -ENODEV; | |
648 | err_free: | |
649 | kfree(buf); | |
7c46c20a | 650 | kfree(scomp); |
9927c688 JB |
651 | kfree(ses_dev->page10); |
652 | kfree(ses_dev->page2); | |
653 | kfree(ses_dev->page1); | |
654 | err_init_free: | |
655 | kfree(ses_dev); | |
656 | kfree(hdr_buf); | |
657 | sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err); | |
658 | return err; | |
659 | } | |
660 | ||
661 | static int ses_remove(struct device *dev) | |
662 | { | |
663 | return 0; | |
664 | } | |
665 | ||
43d8eb9c JB |
666 | static void ses_intf_remove_component(struct scsi_device *sdev) |
667 | { | |
668 | struct enclosure_device *edev, *prev = NULL; | |
669 | ||
670 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
671 | prev = edev; | |
672 | if (!enclosure_remove_device(edev, &sdev->sdev_gendev)) | |
673 | break; | |
674 | } | |
675 | if (edev) | |
676 | put_device(&edev->edev); | |
677 | } | |
678 | ||
679 | static void ses_intf_remove_enclosure(struct scsi_device *sdev) | |
9927c688 | 680 | { |
9927c688 JB |
681 | struct enclosure_device *edev; |
682 | struct ses_device *ses_dev; | |
683 | ||
163f52b6 | 684 | /* exact match to this enclosure */ |
43d8eb9c | 685 | edev = enclosure_find(&sdev->sdev_gendev, NULL); |
9927c688 JB |
686 | if (!edev) |
687 | return; | |
688 | ||
689 | ses_dev = edev->scratch; | |
690 | edev->scratch = NULL; | |
691 | ||
7c46c20a | 692 | kfree(ses_dev->page10); |
9927c688 JB |
693 | kfree(ses_dev->page1); |
694 | kfree(ses_dev->page2); | |
695 | kfree(ses_dev); | |
696 | ||
697 | kfree(edev->component[0].scratch); | |
698 | ||
ee959b00 | 699 | put_device(&edev->edev); |
9927c688 JB |
700 | enclosure_unregister(edev); |
701 | } | |
702 | ||
43d8eb9c JB |
703 | static void ses_intf_remove(struct device *cdev, |
704 | struct class_interface *intf) | |
705 | { | |
706 | struct scsi_device *sdev = to_scsi_device(cdev->parent); | |
707 | ||
708 | if (!scsi_device_enclosure(sdev)) | |
709 | ses_intf_remove_component(sdev); | |
710 | else | |
711 | ses_intf_remove_enclosure(sdev); | |
712 | } | |
713 | ||
9927c688 | 714 | static struct class_interface ses_interface = { |
ee959b00 TJ |
715 | .add_dev = ses_intf_add, |
716 | .remove_dev = ses_intf_remove, | |
9927c688 JB |
717 | }; |
718 | ||
719 | static struct scsi_driver ses_template = { | |
9927c688 JB |
720 | .gendrv = { |
721 | .name = "ses", | |
3af6b352 | 722 | .owner = THIS_MODULE, |
9927c688 JB |
723 | .probe = ses_probe, |
724 | .remove = ses_remove, | |
725 | }, | |
726 | }; | |
727 | ||
728 | static int __init ses_init(void) | |
729 | { | |
730 | int err; | |
731 | ||
732 | err = scsi_register_interface(&ses_interface); | |
733 | if (err) | |
734 | return err; | |
735 | ||
736 | err = scsi_register_driver(&ses_template.gendrv); | |
737 | if (err) | |
738 | goto out_unreg; | |
739 | ||
740 | return 0; | |
741 | ||
742 | out_unreg: | |
743 | scsi_unregister_interface(&ses_interface); | |
744 | return err; | |
745 | } | |
746 | ||
747 | static void __exit ses_exit(void) | |
748 | { | |
749 | scsi_unregister_driver(&ses_template.gendrv); | |
750 | scsi_unregister_interface(&ses_interface); | |
751 | } | |
752 | ||
753 | module_init(ses_init); | |
754 | module_exit(ses_exit); | |
755 | ||
756 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE); | |
757 | ||
758 | MODULE_AUTHOR("James Bottomley"); | |
759 | MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver"); | |
760 | MODULE_LICENSE("GPL v2"); |