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 | ||
08024885 SL |
70 | static void init_device_slot_control(unsigned char *dest_desc, |
71 | struct enclosure_component *ecomp, | |
72 | unsigned char *status) | |
73 | { | |
74 | memcpy(dest_desc, status, 4); | |
75 | dest_desc[0] = 0; | |
76 | /* only clear byte 1 for ENCLOSURE_COMPONENT_DEVICE */ | |
77 | if (ecomp->type == ENCLOSURE_COMPONENT_DEVICE) | |
78 | dest_desc[1] = 0; | |
79 | dest_desc[2] &= 0xde; | |
80 | dest_desc[3] &= 0x3c; | |
81 | } | |
82 | ||
83 | ||
9927c688 JB |
84 | static int ses_recv_diag(struct scsi_device *sdev, int page_code, |
85 | void *buf, int bufflen) | |
86 | { | |
691b4773 | 87 | unsigned char cmd[] = { |
9927c688 JB |
88 | RECEIVE_DIAGNOSTIC, |
89 | 1, /* Set PCV bit */ | |
90 | page_code, | |
91 | bufflen >> 8, | |
92 | bufflen & 0xff, | |
93 | 0 | |
94 | }; | |
95 | ||
96 | return scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen, | |
f4f4e47e | 97 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
98 | } |
99 | ||
100 | static int ses_send_diag(struct scsi_device *sdev, int page_code, | |
101 | void *buf, int bufflen) | |
102 | { | |
103 | u32 result; | |
104 | ||
691b4773 | 105 | unsigned char cmd[] = { |
9927c688 JB |
106 | SEND_DIAGNOSTIC, |
107 | 0x10, /* Set PF bit */ | |
108 | 0, | |
109 | bufflen >> 8, | |
110 | bufflen & 0xff, | |
111 | 0 | |
112 | }; | |
113 | ||
114 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen, | |
f4f4e47e | 115 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
116 | if (result) |
117 | sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n", | |
118 | result); | |
119 | return result; | |
120 | } | |
121 | ||
122 | static int ses_set_page2_descriptor(struct enclosure_device *edev, | |
123 | struct enclosure_component *ecomp, | |
691b4773 | 124 | unsigned char *desc) |
9927c688 JB |
125 | { |
126 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 127 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 128 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 129 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 130 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 JB |
131 | |
132 | /* Clear everything */ | |
133 | memset(desc_ptr, 0, ses_dev->page2_len - 8); | |
8c3adc79 | 134 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
135 | for (j = 0; j < type_ptr[1]; j++) { |
136 | desc_ptr += 4; | |
137 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && | |
138 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
139 | continue; | |
140 | if (count++ == descriptor) { | |
141 | memcpy(desc_ptr, desc, 4); | |
142 | /* set select */ | |
143 | desc_ptr[0] |= 0x80; | |
144 | /* clear reserved, just in case */ | |
145 | desc_ptr[0] &= 0xf0; | |
146 | } | |
147 | } | |
148 | } | |
149 | ||
150 | return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); | |
151 | } | |
152 | ||
691b4773 | 153 | static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev, |
9927c688 JB |
154 | struct enclosure_component *ecomp) |
155 | { | |
156 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 157 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 158 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 159 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 160 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 JB |
161 | |
162 | ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); | |
163 | ||
8c3adc79 | 164 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
165 | for (j = 0; j < type_ptr[1]; j++) { |
166 | desc_ptr += 4; | |
167 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && | |
168 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
169 | continue; | |
170 | if (count++ == descriptor) | |
171 | return desc_ptr; | |
172 | } | |
173 | } | |
174 | return NULL; | |
175 | } | |
176 | ||
2a350cab DG |
177 | /* For device slot and array device slot elements, byte 3 bit 6 |
178 | * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this | |
179 | * code stands these bits are shifted 4 positions right so in | |
180 | * sysfs they will appear as bits 2 and 1 respectively. Strange. */ | |
9927c688 JB |
181 | static void ses_get_fault(struct enclosure_device *edev, |
182 | struct enclosure_component *ecomp) | |
183 | { | |
691b4773 | 184 | unsigned char *desc; |
9927c688 JB |
185 | |
186 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
187 | if (desc) |
188 | ecomp->fault = (desc[3] & 0x60) >> 4; | |
9927c688 JB |
189 | } |
190 | ||
191 | static int ses_set_fault(struct enclosure_device *edev, | |
192 | struct enclosure_component *ecomp, | |
193 | enum enclosure_component_setting val) | |
194 | { | |
08024885 SL |
195 | unsigned char desc[4]; |
196 | unsigned char *desc_ptr; | |
197 | ||
198 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); | |
199 | ||
200 | if (!desc_ptr) | |
201 | return -EIO; | |
202 | ||
203 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
204 | |
205 | switch (val) { | |
206 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 207 | desc[3] &= 0xdf; |
9927c688 JB |
208 | break; |
209 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 210 | desc[3] |= 0x20; |
9927c688 JB |
211 | break; |
212 | default: | |
213 | /* SES doesn't do the SGPIO blink settings */ | |
214 | return -EINVAL; | |
215 | } | |
216 | ||
217 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
218 | } | |
219 | ||
220 | static void ses_get_status(struct enclosure_device *edev, | |
221 | struct enclosure_component *ecomp) | |
222 | { | |
691b4773 | 223 | unsigned char *desc; |
9927c688 JB |
224 | |
225 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
226 | if (desc) |
227 | ecomp->status = (desc[0] & 0x0f); | |
9927c688 JB |
228 | } |
229 | ||
230 | static void ses_get_locate(struct enclosure_device *edev, | |
231 | struct enclosure_component *ecomp) | |
232 | { | |
691b4773 | 233 | unsigned char *desc; |
9927c688 JB |
234 | |
235 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
236 | if (desc) |
237 | ecomp->locate = (desc[2] & 0x02) ? 1 : 0; | |
9927c688 JB |
238 | } |
239 | ||
240 | static int ses_set_locate(struct enclosure_device *edev, | |
241 | struct enclosure_component *ecomp, | |
242 | enum enclosure_component_setting val) | |
243 | { | |
08024885 SL |
244 | unsigned char desc[4]; |
245 | unsigned char *desc_ptr; | |
246 | ||
247 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); | |
248 | ||
249 | if (!desc_ptr) | |
250 | return -EIO; | |
251 | ||
252 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
253 | |
254 | switch (val) { | |
255 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 256 | desc[2] &= 0xfd; |
9927c688 JB |
257 | break; |
258 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 259 | desc[2] |= 0x02; |
9927c688 JB |
260 | break; |
261 | default: | |
262 | /* SES doesn't do the SGPIO blink settings */ | |
263 | return -EINVAL; | |
264 | } | |
265 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
266 | } | |
267 | ||
268 | static int ses_set_active(struct enclosure_device *edev, | |
269 | struct enclosure_component *ecomp, | |
270 | enum enclosure_component_setting val) | |
271 | { | |
08024885 SL |
272 | unsigned char desc[4]; |
273 | unsigned char *desc_ptr; | |
274 | ||
275 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); | |
276 | ||
277 | if (!desc_ptr) | |
278 | return -EIO; | |
279 | ||
280 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
281 | |
282 | switch (val) { | |
283 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 284 | desc[2] &= 0x7f; |
9927c688 JB |
285 | ecomp->active = 0; |
286 | break; | |
287 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 288 | desc[2] |= 0x80; |
9927c688 JB |
289 | ecomp->active = 1; |
290 | break; | |
291 | default: | |
292 | /* SES doesn't do the SGPIO blink settings */ | |
293 | return -EINVAL; | |
294 | } | |
295 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
296 | } | |
297 | ||
967f7bab DW |
298 | static int ses_show_id(struct enclosure_device *edev, char *buf) |
299 | { | |
300 | struct ses_device *ses_dev = edev->scratch; | |
301 | unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4); | |
302 | ||
303 | return sprintf(buf, "%#llx\n", id); | |
304 | } | |
305 | ||
08024885 SL |
306 | static void ses_get_power_status(struct enclosure_device *edev, |
307 | struct enclosure_component *ecomp) | |
308 | { | |
309 | unsigned char *desc; | |
310 | ||
311 | desc = ses_get_page2_descriptor(edev, ecomp); | |
312 | if (desc) | |
313 | ecomp->power_status = (desc[3] & 0x10) ? 0 : 1; | |
314 | } | |
315 | ||
316 | static int ses_set_power_status(struct enclosure_device *edev, | |
317 | struct enclosure_component *ecomp, | |
318 | int val) | |
319 | { | |
320 | unsigned char desc[4]; | |
321 | unsigned char *desc_ptr; | |
322 | ||
323 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); | |
324 | ||
325 | if (!desc_ptr) | |
326 | return -EIO; | |
327 | ||
328 | init_device_slot_control(desc, ecomp, desc_ptr); | |
329 | ||
330 | switch (val) { | |
331 | /* power = 1 is device_off = 0 and vice versa */ | |
332 | case 0: | |
333 | desc[3] |= 0x10; | |
334 | break; | |
335 | case 1: | |
336 | desc[3] &= 0xef; | |
337 | break; | |
338 | default: | |
339 | return -EINVAL; | |
340 | } | |
341 | ecomp->power_status = val; | |
342 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
343 | } | |
344 | ||
9927c688 JB |
345 | static struct enclosure_component_callbacks ses_enclosure_callbacks = { |
346 | .get_fault = ses_get_fault, | |
347 | .set_fault = ses_set_fault, | |
348 | .get_status = ses_get_status, | |
349 | .get_locate = ses_get_locate, | |
350 | .set_locate = ses_set_locate, | |
08024885 SL |
351 | .get_power_status = ses_get_power_status, |
352 | .set_power_status = ses_set_power_status, | |
9927c688 | 353 | .set_active = ses_set_active, |
967f7bab | 354 | .show_id = ses_show_id, |
9927c688 JB |
355 | }; |
356 | ||
357 | struct ses_host_edev { | |
358 | struct Scsi_Host *shost; | |
359 | struct enclosure_device *edev; | |
360 | }; | |
361 | ||
e0aae1a5 | 362 | #if 0 |
9927c688 JB |
363 | int ses_match_host(struct enclosure_device *edev, void *data) |
364 | { | |
365 | struct ses_host_edev *sed = data; | |
366 | struct scsi_device *sdev; | |
367 | ||
ee959b00 | 368 | if (!scsi_is_sdev_device(edev->edev.parent)) |
9927c688 JB |
369 | return 0; |
370 | ||
ee959b00 | 371 | sdev = to_scsi_device(edev->edev.parent); |
9927c688 JB |
372 | |
373 | if (sdev->host != sed->shost) | |
374 | return 0; | |
375 | ||
376 | sed->edev = edev; | |
377 | return 1; | |
378 | } | |
e0aae1a5 | 379 | #endif /* 0 */ |
9927c688 JB |
380 | |
381 | static void ses_process_descriptor(struct enclosure_component *ecomp, | |
382 | unsigned char *desc) | |
383 | { | |
384 | int eip = desc[0] & 0x10; | |
385 | int invalid = desc[0] & 0x80; | |
386 | enum scsi_protocol proto = desc[0] & 0x0f; | |
387 | u64 addr = 0; | |
921ce7f5 | 388 | int slot = -1; |
9927c688 JB |
389 | struct ses_component *scomp = ecomp->scratch; |
390 | unsigned char *d; | |
391 | ||
9927c688 JB |
392 | if (invalid) |
393 | return; | |
394 | ||
395 | switch (proto) { | |
921ce7f5 DW |
396 | case SCSI_PROTOCOL_FCP: |
397 | if (eip) { | |
398 | d = desc + 4; | |
399 | slot = d[3]; | |
400 | } | |
401 | break; | |
9927c688 | 402 | case SCSI_PROTOCOL_SAS: |
921ce7f5 DW |
403 | if (eip) { |
404 | d = desc + 4; | |
405 | slot = d[3]; | |
9927c688 | 406 | d = desc + 8; |
921ce7f5 | 407 | } else |
9927c688 JB |
408 | d = desc + 4; |
409 | /* only take the phy0 addr */ | |
410 | addr = (u64)d[12] << 56 | | |
411 | (u64)d[13] << 48 | | |
412 | (u64)d[14] << 40 | | |
413 | (u64)d[15] << 32 | | |
414 | (u64)d[16] << 24 | | |
415 | (u64)d[17] << 16 | | |
416 | (u64)d[18] << 8 | | |
417 | (u64)d[19]; | |
418 | break; | |
419 | default: | |
420 | /* FIXME: Need to add more protocols than just SAS */ | |
421 | break; | |
422 | } | |
921ce7f5 | 423 | ecomp->slot = slot; |
9927c688 JB |
424 | scomp->addr = addr; |
425 | } | |
426 | ||
427 | struct efd { | |
428 | u64 addr; | |
429 | struct device *dev; | |
430 | }; | |
431 | ||
432 | static int ses_enclosure_find_by_addr(struct enclosure_device *edev, | |
433 | void *data) | |
434 | { | |
435 | struct efd *efd = data; | |
436 | int i; | |
437 | struct ses_component *scomp; | |
438 | ||
439 | if (!edev->component[0].scratch) | |
440 | return 0; | |
441 | ||
442 | for (i = 0; i < edev->components; i++) { | |
443 | scomp = edev->component[i].scratch; | |
444 | if (scomp->addr != efd->addr) | |
445 | continue; | |
446 | ||
15a0fbbc DW |
447 | if (enclosure_add_device(edev, i, efd->dev) == 0) |
448 | kobject_uevent(&efd->dev->kobj, KOBJ_CHANGE); | |
9927c688 JB |
449 | return 1; |
450 | } | |
451 | return 0; | |
452 | } | |
453 | ||
21fab1d0 JB |
454 | #define INIT_ALLOC_SIZE 32 |
455 | ||
456 | static void ses_enclosure_data_process(struct enclosure_device *edev, | |
457 | struct scsi_device *sdev, | |
458 | int create) | |
459 | { | |
460 | u32 result; | |
461 | unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL; | |
462 | int i, j, page7_len, len, components; | |
463 | struct ses_device *ses_dev = edev->scratch; | |
8c3adc79 | 464 | int types = ses_dev->page1_num_types; |
21fab1d0 JB |
465 | unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); |
466 | ||
467 | if (!hdr_buf) | |
468 | goto simple_populate; | |
469 | ||
470 | /* re-read page 10 */ | |
471 | if (ses_dev->page10) | |
472 | ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len); | |
473 | /* Page 7 for the descriptors is optional */ | |
474 | result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE); | |
475 | if (result) | |
476 | goto simple_populate; | |
477 | ||
478 | page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
479 | /* add 1 for trailing '\0' we'll use */ | |
480 | buf = kzalloc(len + 1, GFP_KERNEL); | |
481 | if (!buf) | |
482 | goto simple_populate; | |
483 | result = ses_recv_diag(sdev, 7, buf, len); | |
484 | if (result) { | |
485 | simple_populate: | |
486 | kfree(buf); | |
487 | buf = NULL; | |
488 | desc_ptr = NULL; | |
489 | len = 0; | |
490 | page7_len = 0; | |
491 | } else { | |
492 | desc_ptr = buf + 8; | |
493 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
494 | /* skip past overall descriptor */ | |
495 | desc_ptr += len + 4; | |
21fab1d0 | 496 | } |
877a5597 JH |
497 | if (ses_dev->page10) |
498 | addl_desc_ptr = ses_dev->page10 + 8; | |
8c3adc79 | 499 | type_ptr = ses_dev->page1_types; |
21fab1d0 JB |
500 | components = 0; |
501 | for (i = 0; i < types; i++, type_ptr += 4) { | |
502 | for (j = 0; j < type_ptr[1]; j++) { | |
503 | char *name = NULL; | |
504 | struct enclosure_component *ecomp; | |
505 | ||
506 | if (desc_ptr) { | |
507 | if (desc_ptr >= buf + page7_len) { | |
508 | desc_ptr = NULL; | |
509 | } else { | |
510 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
511 | desc_ptr += 4; | |
512 | /* Add trailing zero - pushes into | |
513 | * reserved space */ | |
514 | desc_ptr[len] = '\0'; | |
515 | name = desc_ptr; | |
516 | } | |
517 | } | |
518 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
519 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) { | |
520 | ||
521 | if (create) | |
ed09dcc8 DW |
522 | ecomp = enclosure_component_alloc( |
523 | edev, | |
524 | components++, | |
525 | type_ptr[0], | |
526 | name); | |
21fab1d0 JB |
527 | else |
528 | ecomp = &edev->component[components++]; | |
529 | ||
ed09dcc8 | 530 | if (!IS_ERR(ecomp)) { |
08024885 | 531 | ses_get_power_status(edev, ecomp); |
ed09dcc8 DW |
532 | if (addl_desc_ptr) |
533 | ses_process_descriptor( | |
534 | ecomp, | |
535 | addl_desc_ptr); | |
536 | if (create) | |
537 | enclosure_component_register( | |
538 | ecomp); | |
539 | } | |
21fab1d0 JB |
540 | } |
541 | if (desc_ptr) | |
542 | desc_ptr += len; | |
543 | ||
544 | if (addl_desc_ptr) | |
545 | addl_desc_ptr += addl_desc_ptr[1] + 2; | |
546 | ||
547 | } | |
548 | } | |
549 | kfree(buf); | |
550 | kfree(hdr_buf); | |
551 | } | |
552 | ||
9927c688 JB |
553 | static void ses_match_to_enclosure(struct enclosure_device *edev, |
554 | struct scsi_device *sdev) | |
555 | { | |
9927c688 | 556 | unsigned char *desc; |
9927c688 JB |
557 | struct efd efd = { |
558 | .addr = 0, | |
559 | }; | |
9927c688 | 560 | |
21fab1d0 JB |
561 | ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0); |
562 | ||
c38c007a HR |
563 | if (!sdev->vpd_pg83_len) |
564 | return; | |
671a99c8 | 565 | |
c38c007a HR |
566 | desc = sdev->vpd_pg83 + 4; |
567 | while (desc < sdev->vpd_pg83 + sdev->vpd_pg83_len) { | |
9927c688 JB |
568 | enum scsi_protocol proto = desc[0] >> 4; |
569 | u8 code_set = desc[0] & 0x0f; | |
570 | u8 piv = desc[1] & 0x80; | |
571 | u8 assoc = (desc[1] & 0x30) >> 4; | |
572 | u8 type = desc[1] & 0x0f; | |
573 | u8 len = desc[3]; | |
574 | ||
b3f1f9aa | 575 | if (piv && code_set == 1 && assoc == 1 |
9927c688 | 576 | && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8) |
c38c007a | 577 | efd.addr = get_unaligned_be64(&desc[4]); |
9927c688 JB |
578 | |
579 | desc += len + 4; | |
580 | } | |
c38c007a HR |
581 | if (efd.addr) { |
582 | efd.dev = &sdev->sdev_gendev; | |
9927c688 | 583 | |
c38c007a HR |
584 | enclosure_for_each_device(ses_enclosure_find_by_addr, &efd); |
585 | } | |
9927c688 JB |
586 | } |
587 | ||
ee959b00 | 588 | static int ses_intf_add(struct device *cdev, |
9927c688 JB |
589 | struct class_interface *intf) |
590 | { | |
ee959b00 | 591 | struct scsi_device *sdev = to_scsi_device(cdev->parent); |
9927c688 | 592 | struct scsi_device *tmp_sdev; |
21fab1d0 | 593 | unsigned char *buf = NULL, *hdr_buf, *type_ptr; |
9927c688 JB |
594 | struct ses_device *ses_dev; |
595 | u32 result; | |
21fab1d0 | 596 | int i, types, len, components = 0; |
9927c688 | 597 | int err = -ENOMEM; |
8c3adc79 | 598 | int num_enclosures; |
9927c688 | 599 | struct enclosure_device *edev; |
7c46c20a | 600 | struct ses_component *scomp = NULL; |
9927c688 JB |
601 | |
602 | if (!scsi_device_enclosure(sdev)) { | |
603 | /* not an enclosure, but might be in one */ | |
163f52b6 JB |
604 | struct enclosure_device *prev = NULL; |
605 | ||
606 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
9927c688 | 607 | ses_match_to_enclosure(edev, sdev); |
163f52b6 | 608 | prev = edev; |
9927c688 JB |
609 | } |
610 | return -ENODEV; | |
611 | } | |
612 | ||
613 | /* TYPE_ENCLOSURE prints a message in probe */ | |
614 | if (sdev->type != TYPE_ENCLOSURE) | |
615 | sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n"); | |
616 | ||
617 | ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL); | |
618 | hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); | |
619 | if (!hdr_buf || !ses_dev) | |
620 | goto err_init_free; | |
621 | ||
622 | result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE); | |
623 | if (result) | |
624 | goto recv_failed; | |
625 | ||
9927c688 JB |
626 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
627 | buf = kzalloc(len, GFP_KERNEL); | |
628 | if (!buf) | |
629 | goto err_free; | |
630 | ||
9927c688 JB |
631 | result = ses_recv_diag(sdev, 1, buf, len); |
632 | if (result) | |
633 | goto recv_failed; | |
634 | ||
8c3adc79 | 635 | types = 0; |
9927c688 | 636 | |
8c3adc79 JB |
637 | /* we always have one main enclosure and the rest are referred |
638 | * to as secondary subenclosures */ | |
639 | num_enclosures = buf[1] + 1; | |
9927c688 | 640 | |
8c3adc79 JB |
641 | /* begin at the enclosure descriptor */ |
642 | type_ptr = buf + 8; | |
643 | /* skip all the enclosure descriptors */ | |
644 | for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) { | |
645 | types += type_ptr[2]; | |
646 | type_ptr += type_ptr[3] + 4; | |
647 | } | |
648 | ||
649 | ses_dev->page1_types = type_ptr; | |
650 | ses_dev->page1_num_types = types; | |
651 | ||
652 | for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) { | |
9927c688 JB |
653 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || |
654 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
655 | components += type_ptr[1]; | |
656 | } | |
7c46c20a YL |
657 | ses_dev->page1 = buf; |
658 | ses_dev->page1_len = len; | |
659 | buf = NULL; | |
9927c688 JB |
660 | |
661 | result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE); | |
662 | if (result) | |
663 | goto recv_failed; | |
664 | ||
665 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
666 | buf = kzalloc(len, GFP_KERNEL); | |
667 | if (!buf) | |
668 | goto err_free; | |
669 | ||
670 | /* make sure getting page 2 actually works */ | |
671 | result = ses_recv_diag(sdev, 2, buf, len); | |
672 | if (result) | |
673 | goto recv_failed; | |
674 | ses_dev->page2 = buf; | |
675 | ses_dev->page2_len = len; | |
7c46c20a | 676 | buf = NULL; |
9927c688 JB |
677 | |
678 | /* The additional information page --- allows us | |
679 | * to match up the devices */ | |
680 | result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE); | |
691b4773 YL |
681 | if (!result) { |
682 | ||
683 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
684 | buf = kzalloc(len, GFP_KERNEL); | |
685 | if (!buf) | |
686 | goto err_free; | |
687 | ||
688 | result = ses_recv_diag(sdev, 10, buf, len); | |
689 | if (result) | |
690 | goto recv_failed; | |
691 | ses_dev->page10 = buf; | |
692 | ses_dev->page10_len = len; | |
693 | buf = NULL; | |
694 | } | |
7c46c20a | 695 | scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL); |
9927c688 | 696 | if (!scomp) |
7c46c20a | 697 | goto err_free; |
9927c688 | 698 | |
71610f55 | 699 | edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev), |
9927c688 JB |
700 | components, &ses_enclosure_callbacks); |
701 | if (IS_ERR(edev)) { | |
702 | err = PTR_ERR(edev); | |
703 | goto err_free; | |
704 | } | |
705 | ||
9b3a6549 JL |
706 | kfree(hdr_buf); |
707 | ||
9927c688 JB |
708 | edev->scratch = ses_dev; |
709 | for (i = 0; i < components; i++) | |
7c46c20a | 710 | edev->component[i].scratch = scomp + i; |
9927c688 | 711 | |
21fab1d0 | 712 | ses_enclosure_data_process(edev, sdev, 1); |
9927c688 JB |
713 | |
714 | /* see if there are any devices matching before | |
715 | * we found the enclosure */ | |
716 | shost_for_each_device(tmp_sdev, sdev->host) { | |
717 | if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) | |
718 | continue; | |
719 | ses_match_to_enclosure(edev, tmp_sdev); | |
720 | } | |
721 | ||
722 | return 0; | |
723 | ||
724 | recv_failed: | |
725 | sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n", | |
726 | result); | |
727 | err = -ENODEV; | |
728 | err_free: | |
729 | kfree(buf); | |
7c46c20a | 730 | kfree(scomp); |
9927c688 JB |
731 | kfree(ses_dev->page10); |
732 | kfree(ses_dev->page2); | |
733 | kfree(ses_dev->page1); | |
734 | err_init_free: | |
735 | kfree(ses_dev); | |
736 | kfree(hdr_buf); | |
737 | sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err); | |
738 | return err; | |
739 | } | |
740 | ||
741 | static int ses_remove(struct device *dev) | |
742 | { | |
743 | return 0; | |
744 | } | |
745 | ||
43d8eb9c JB |
746 | static void ses_intf_remove_component(struct scsi_device *sdev) |
747 | { | |
748 | struct enclosure_device *edev, *prev = NULL; | |
749 | ||
750 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
751 | prev = edev; | |
752 | if (!enclosure_remove_device(edev, &sdev->sdev_gendev)) | |
753 | break; | |
754 | } | |
755 | if (edev) | |
756 | put_device(&edev->edev); | |
757 | } | |
758 | ||
759 | static void ses_intf_remove_enclosure(struct scsi_device *sdev) | |
9927c688 | 760 | { |
9927c688 JB |
761 | struct enclosure_device *edev; |
762 | struct ses_device *ses_dev; | |
763 | ||
163f52b6 | 764 | /* exact match to this enclosure */ |
43d8eb9c | 765 | edev = enclosure_find(&sdev->sdev_gendev, NULL); |
9927c688 JB |
766 | if (!edev) |
767 | return; | |
768 | ||
769 | ses_dev = edev->scratch; | |
770 | edev->scratch = NULL; | |
771 | ||
7c46c20a | 772 | kfree(ses_dev->page10); |
9927c688 JB |
773 | kfree(ses_dev->page1); |
774 | kfree(ses_dev->page2); | |
775 | kfree(ses_dev); | |
776 | ||
777 | kfree(edev->component[0].scratch); | |
778 | ||
ee959b00 | 779 | put_device(&edev->edev); |
9927c688 JB |
780 | enclosure_unregister(edev); |
781 | } | |
782 | ||
43d8eb9c JB |
783 | static void ses_intf_remove(struct device *cdev, |
784 | struct class_interface *intf) | |
785 | { | |
786 | struct scsi_device *sdev = to_scsi_device(cdev->parent); | |
787 | ||
788 | if (!scsi_device_enclosure(sdev)) | |
789 | ses_intf_remove_component(sdev); | |
790 | else | |
791 | ses_intf_remove_enclosure(sdev); | |
792 | } | |
793 | ||
9927c688 | 794 | static struct class_interface ses_interface = { |
ee959b00 TJ |
795 | .add_dev = ses_intf_add, |
796 | .remove_dev = ses_intf_remove, | |
9927c688 JB |
797 | }; |
798 | ||
799 | static struct scsi_driver ses_template = { | |
9927c688 JB |
800 | .gendrv = { |
801 | .name = "ses", | |
3af6b352 | 802 | .owner = THIS_MODULE, |
9927c688 JB |
803 | .probe = ses_probe, |
804 | .remove = ses_remove, | |
805 | }, | |
806 | }; | |
807 | ||
808 | static int __init ses_init(void) | |
809 | { | |
810 | int err; | |
811 | ||
812 | err = scsi_register_interface(&ses_interface); | |
813 | if (err) | |
814 | return err; | |
815 | ||
816 | err = scsi_register_driver(&ses_template.gendrv); | |
817 | if (err) | |
818 | goto out_unreg; | |
819 | ||
820 | return 0; | |
821 | ||
822 | out_unreg: | |
823 | scsi_unregister_interface(&ses_interface); | |
824 | return err; | |
825 | } | |
826 | ||
827 | static void __exit ses_exit(void) | |
828 | { | |
829 | scsi_unregister_driver(&ses_template.gendrv); | |
830 | scsi_unregister_interface(&ses_interface); | |
831 | } | |
832 | ||
833 | module_init(ses_init); | |
834 | module_exit(ses_exit); | |
835 | ||
836 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE); | |
837 | ||
838 | MODULE_AUTHOR("James Bottomley"); | |
839 | MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver"); | |
840 | MODULE_LICENSE("GPL v2"); |