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 | { | |
3417c1b5 | 87 | int ret; |
691b4773 | 88 | unsigned char cmd[] = { |
9927c688 JB |
89 | RECEIVE_DIAGNOSTIC, |
90 | 1, /* Set PCV bit */ | |
91 | page_code, | |
92 | bufflen >> 8, | |
93 | bufflen & 0xff, | |
94 | 0 | |
95 | }; | |
3417c1b5 | 96 | unsigned char recv_page_code; |
9927c688 | 97 | |
3417c1b5 | 98 | ret = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen, |
f4f4e47e | 99 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
3417c1b5 JB |
100 | if (unlikely(!ret)) |
101 | return ret; | |
102 | ||
103 | recv_page_code = ((unsigned char *)buf)[0]; | |
104 | ||
105 | if (likely(recv_page_code == page_code)) | |
106 | return ret; | |
107 | ||
108 | /* successful diagnostic but wrong page code. This happens to some | |
109 | * USB devices, just print a message and pretend there was an error */ | |
110 | ||
111 | sdev_printk(KERN_ERR, sdev, | |
112 | "Wrong diagnostic page; asked for %d got %u\n", | |
113 | page_code, recv_page_code); | |
114 | ||
115 | return -EINVAL; | |
9927c688 JB |
116 | } |
117 | ||
118 | static int ses_send_diag(struct scsi_device *sdev, int page_code, | |
119 | void *buf, int bufflen) | |
120 | { | |
121 | u32 result; | |
122 | ||
691b4773 | 123 | unsigned char cmd[] = { |
9927c688 JB |
124 | SEND_DIAGNOSTIC, |
125 | 0x10, /* Set PF bit */ | |
126 | 0, | |
127 | bufflen >> 8, | |
128 | bufflen & 0xff, | |
129 | 0 | |
130 | }; | |
131 | ||
132 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen, | |
f4f4e47e | 133 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
134 | if (result) |
135 | sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n", | |
136 | result); | |
137 | return result; | |
138 | } | |
139 | ||
140 | static int ses_set_page2_descriptor(struct enclosure_device *edev, | |
141 | struct enclosure_component *ecomp, | |
691b4773 | 142 | unsigned char *desc) |
9927c688 JB |
143 | { |
144 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 145 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 146 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 147 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 148 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 JB |
149 | |
150 | /* Clear everything */ | |
151 | memset(desc_ptr, 0, ses_dev->page2_len - 8); | |
8c3adc79 | 152 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
153 | for (j = 0; j < type_ptr[1]; j++) { |
154 | desc_ptr += 4; | |
155 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && | |
156 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
157 | continue; | |
158 | if (count++ == descriptor) { | |
159 | memcpy(desc_ptr, desc, 4); | |
160 | /* set select */ | |
161 | desc_ptr[0] |= 0x80; | |
162 | /* clear reserved, just in case */ | |
163 | desc_ptr[0] &= 0xf0; | |
164 | } | |
165 | } | |
166 | } | |
167 | ||
168 | return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); | |
169 | } | |
170 | ||
691b4773 | 171 | static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev, |
9927c688 JB |
172 | struct enclosure_component *ecomp) |
173 | { | |
174 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 175 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 176 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 177 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 178 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 JB |
179 | |
180 | ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); | |
181 | ||
8c3adc79 | 182 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
183 | for (j = 0; j < type_ptr[1]; j++) { |
184 | desc_ptr += 4; | |
185 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && | |
186 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
187 | continue; | |
188 | if (count++ == descriptor) | |
189 | return desc_ptr; | |
190 | } | |
191 | } | |
192 | return NULL; | |
193 | } | |
194 | ||
2a350cab DG |
195 | /* For device slot and array device slot elements, byte 3 bit 6 |
196 | * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this | |
197 | * code stands these bits are shifted 4 positions right so in | |
198 | * sysfs they will appear as bits 2 and 1 respectively. Strange. */ | |
9927c688 JB |
199 | static void ses_get_fault(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->fault = (desc[3] & 0x60) >> 4; | |
9927c688 JB |
207 | } |
208 | ||
209 | static int ses_set_fault(struct enclosure_device *edev, | |
210 | struct enclosure_component *ecomp, | |
211 | enum enclosure_component_setting val) | |
212 | { | |
08024885 SL |
213 | unsigned char desc[4]; |
214 | unsigned char *desc_ptr; | |
215 | ||
216 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); | |
217 | ||
218 | if (!desc_ptr) | |
219 | return -EIO; | |
220 | ||
221 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
222 | |
223 | switch (val) { | |
224 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 225 | desc[3] &= 0xdf; |
9927c688 JB |
226 | break; |
227 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 228 | desc[3] |= 0x20; |
9927c688 JB |
229 | break; |
230 | default: | |
231 | /* SES doesn't do the SGPIO blink settings */ | |
232 | return -EINVAL; | |
233 | } | |
234 | ||
235 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
236 | } | |
237 | ||
238 | static void ses_get_status(struct enclosure_device *edev, | |
239 | struct enclosure_component *ecomp) | |
240 | { | |
691b4773 | 241 | unsigned char *desc; |
9927c688 JB |
242 | |
243 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
244 | if (desc) |
245 | ecomp->status = (desc[0] & 0x0f); | |
9927c688 JB |
246 | } |
247 | ||
248 | static void ses_get_locate(struct enclosure_device *edev, | |
249 | struct enclosure_component *ecomp) | |
250 | { | |
691b4773 | 251 | unsigned char *desc; |
9927c688 JB |
252 | |
253 | desc = ses_get_page2_descriptor(edev, ecomp); | |
691b4773 YL |
254 | if (desc) |
255 | ecomp->locate = (desc[2] & 0x02) ? 1 : 0; | |
9927c688 JB |
256 | } |
257 | ||
258 | static int ses_set_locate(struct enclosure_device *edev, | |
259 | struct enclosure_component *ecomp, | |
260 | enum enclosure_component_setting val) | |
261 | { | |
08024885 SL |
262 | unsigned char desc[4]; |
263 | unsigned char *desc_ptr; | |
264 | ||
265 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); | |
266 | ||
267 | if (!desc_ptr) | |
268 | return -EIO; | |
269 | ||
270 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
271 | |
272 | switch (val) { | |
273 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 274 | desc[2] &= 0xfd; |
9927c688 JB |
275 | break; |
276 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 277 | desc[2] |= 0x02; |
9927c688 JB |
278 | break; |
279 | default: | |
280 | /* SES doesn't do the SGPIO blink settings */ | |
281 | return -EINVAL; | |
282 | } | |
283 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
284 | } | |
285 | ||
286 | static int ses_set_active(struct enclosure_device *edev, | |
287 | struct enclosure_component *ecomp, | |
288 | enum enclosure_component_setting val) | |
289 | { | |
08024885 SL |
290 | unsigned char desc[4]; |
291 | unsigned char *desc_ptr; | |
292 | ||
293 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); | |
294 | ||
295 | if (!desc_ptr) | |
296 | return -EIO; | |
297 | ||
298 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
299 | |
300 | switch (val) { | |
301 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 302 | desc[2] &= 0x7f; |
9927c688 JB |
303 | ecomp->active = 0; |
304 | break; | |
305 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 306 | desc[2] |= 0x80; |
9927c688 JB |
307 | ecomp->active = 1; |
308 | break; | |
309 | default: | |
310 | /* SES doesn't do the SGPIO blink settings */ | |
311 | return -EINVAL; | |
312 | } | |
313 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
314 | } | |
315 | ||
967f7bab DW |
316 | static int ses_show_id(struct enclosure_device *edev, char *buf) |
317 | { | |
318 | struct ses_device *ses_dev = edev->scratch; | |
319 | unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4); | |
320 | ||
321 | return sprintf(buf, "%#llx\n", id); | |
322 | } | |
323 | ||
08024885 SL |
324 | static void ses_get_power_status(struct enclosure_device *edev, |
325 | struct enclosure_component *ecomp) | |
326 | { | |
327 | unsigned char *desc; | |
328 | ||
329 | desc = ses_get_page2_descriptor(edev, ecomp); | |
330 | if (desc) | |
331 | ecomp->power_status = (desc[3] & 0x10) ? 0 : 1; | |
332 | } | |
333 | ||
334 | static int ses_set_power_status(struct enclosure_device *edev, | |
335 | struct enclosure_component *ecomp, | |
336 | int val) | |
337 | { | |
338 | unsigned char desc[4]; | |
339 | unsigned char *desc_ptr; | |
340 | ||
341 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); | |
342 | ||
343 | if (!desc_ptr) | |
344 | return -EIO; | |
345 | ||
346 | init_device_slot_control(desc, ecomp, desc_ptr); | |
347 | ||
348 | switch (val) { | |
349 | /* power = 1 is device_off = 0 and vice versa */ | |
350 | case 0: | |
351 | desc[3] |= 0x10; | |
352 | break; | |
353 | case 1: | |
354 | desc[3] &= 0xef; | |
355 | break; | |
356 | default: | |
357 | return -EINVAL; | |
358 | } | |
359 | ecomp->power_status = val; | |
360 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
361 | } | |
362 | ||
9927c688 JB |
363 | static struct enclosure_component_callbacks ses_enclosure_callbacks = { |
364 | .get_fault = ses_get_fault, | |
365 | .set_fault = ses_set_fault, | |
366 | .get_status = ses_get_status, | |
367 | .get_locate = ses_get_locate, | |
368 | .set_locate = ses_set_locate, | |
08024885 SL |
369 | .get_power_status = ses_get_power_status, |
370 | .set_power_status = ses_set_power_status, | |
9927c688 | 371 | .set_active = ses_set_active, |
967f7bab | 372 | .show_id = ses_show_id, |
9927c688 JB |
373 | }; |
374 | ||
375 | struct ses_host_edev { | |
376 | struct Scsi_Host *shost; | |
377 | struct enclosure_device *edev; | |
378 | }; | |
379 | ||
e0aae1a5 | 380 | #if 0 |
9927c688 JB |
381 | int ses_match_host(struct enclosure_device *edev, void *data) |
382 | { | |
383 | struct ses_host_edev *sed = data; | |
384 | struct scsi_device *sdev; | |
385 | ||
ee959b00 | 386 | if (!scsi_is_sdev_device(edev->edev.parent)) |
9927c688 JB |
387 | return 0; |
388 | ||
ee959b00 | 389 | sdev = to_scsi_device(edev->edev.parent); |
9927c688 JB |
390 | |
391 | if (sdev->host != sed->shost) | |
392 | return 0; | |
393 | ||
394 | sed->edev = edev; | |
395 | return 1; | |
396 | } | |
e0aae1a5 | 397 | #endif /* 0 */ |
9927c688 JB |
398 | |
399 | static void ses_process_descriptor(struct enclosure_component *ecomp, | |
400 | unsigned char *desc) | |
401 | { | |
402 | int eip = desc[0] & 0x10; | |
403 | int invalid = desc[0] & 0x80; | |
404 | enum scsi_protocol proto = desc[0] & 0x0f; | |
405 | u64 addr = 0; | |
921ce7f5 | 406 | int slot = -1; |
9927c688 JB |
407 | struct ses_component *scomp = ecomp->scratch; |
408 | unsigned char *d; | |
409 | ||
9927c688 JB |
410 | if (invalid) |
411 | return; | |
412 | ||
413 | switch (proto) { | |
921ce7f5 DW |
414 | case SCSI_PROTOCOL_FCP: |
415 | if (eip) { | |
416 | d = desc + 4; | |
417 | slot = d[3]; | |
418 | } | |
419 | break; | |
9927c688 | 420 | case SCSI_PROTOCOL_SAS: |
921ce7f5 DW |
421 | if (eip) { |
422 | d = desc + 4; | |
423 | slot = d[3]; | |
9927c688 | 424 | d = desc + 8; |
921ce7f5 | 425 | } else |
9927c688 JB |
426 | d = desc + 4; |
427 | /* only take the phy0 addr */ | |
428 | addr = (u64)d[12] << 56 | | |
429 | (u64)d[13] << 48 | | |
430 | (u64)d[14] << 40 | | |
431 | (u64)d[15] << 32 | | |
432 | (u64)d[16] << 24 | | |
433 | (u64)d[17] << 16 | | |
434 | (u64)d[18] << 8 | | |
435 | (u64)d[19]; | |
436 | break; | |
437 | default: | |
438 | /* FIXME: Need to add more protocols than just SAS */ | |
439 | break; | |
440 | } | |
921ce7f5 | 441 | ecomp->slot = slot; |
9927c688 JB |
442 | scomp->addr = addr; |
443 | } | |
444 | ||
445 | struct efd { | |
446 | u64 addr; | |
447 | struct device *dev; | |
448 | }; | |
449 | ||
450 | static int ses_enclosure_find_by_addr(struct enclosure_device *edev, | |
451 | void *data) | |
452 | { | |
453 | struct efd *efd = data; | |
454 | int i; | |
455 | struct ses_component *scomp; | |
456 | ||
457 | if (!edev->component[0].scratch) | |
458 | return 0; | |
459 | ||
460 | for (i = 0; i < edev->components; i++) { | |
461 | scomp = edev->component[i].scratch; | |
462 | if (scomp->addr != efd->addr) | |
463 | continue; | |
464 | ||
15a0fbbc DW |
465 | if (enclosure_add_device(edev, i, efd->dev) == 0) |
466 | kobject_uevent(&efd->dev->kobj, KOBJ_CHANGE); | |
9927c688 JB |
467 | return 1; |
468 | } | |
469 | return 0; | |
470 | } | |
471 | ||
21fab1d0 JB |
472 | #define INIT_ALLOC_SIZE 32 |
473 | ||
474 | static void ses_enclosure_data_process(struct enclosure_device *edev, | |
475 | struct scsi_device *sdev, | |
476 | int create) | |
477 | { | |
478 | u32 result; | |
479 | unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL; | |
480 | int i, j, page7_len, len, components; | |
481 | struct ses_device *ses_dev = edev->scratch; | |
8c3adc79 | 482 | int types = ses_dev->page1_num_types; |
21fab1d0 JB |
483 | unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); |
484 | ||
485 | if (!hdr_buf) | |
486 | goto simple_populate; | |
487 | ||
488 | /* re-read page 10 */ | |
489 | if (ses_dev->page10) | |
490 | ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len); | |
491 | /* Page 7 for the descriptors is optional */ | |
492 | result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE); | |
493 | if (result) | |
494 | goto simple_populate; | |
495 | ||
496 | page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
497 | /* add 1 for trailing '\0' we'll use */ | |
498 | buf = kzalloc(len + 1, GFP_KERNEL); | |
499 | if (!buf) | |
500 | goto simple_populate; | |
501 | result = ses_recv_diag(sdev, 7, buf, len); | |
502 | if (result) { | |
503 | simple_populate: | |
504 | kfree(buf); | |
505 | buf = NULL; | |
506 | desc_ptr = NULL; | |
507 | len = 0; | |
508 | page7_len = 0; | |
509 | } else { | |
510 | desc_ptr = buf + 8; | |
511 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
512 | /* skip past overall descriptor */ | |
513 | desc_ptr += len + 4; | |
21fab1d0 | 514 | } |
877a5597 JH |
515 | if (ses_dev->page10) |
516 | addl_desc_ptr = ses_dev->page10 + 8; | |
8c3adc79 | 517 | type_ptr = ses_dev->page1_types; |
21fab1d0 JB |
518 | components = 0; |
519 | for (i = 0; i < types; i++, type_ptr += 4) { | |
520 | for (j = 0; j < type_ptr[1]; j++) { | |
521 | char *name = NULL; | |
522 | struct enclosure_component *ecomp; | |
523 | ||
524 | if (desc_ptr) { | |
525 | if (desc_ptr >= buf + page7_len) { | |
526 | desc_ptr = NULL; | |
527 | } else { | |
528 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
529 | desc_ptr += 4; | |
530 | /* Add trailing zero - pushes into | |
531 | * reserved space */ | |
532 | desc_ptr[len] = '\0'; | |
533 | name = desc_ptr; | |
534 | } | |
535 | } | |
536 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
537 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) { | |
538 | ||
539 | if (create) | |
ed09dcc8 DW |
540 | ecomp = enclosure_component_alloc( |
541 | edev, | |
542 | components++, | |
543 | type_ptr[0], | |
544 | name); | |
21fab1d0 JB |
545 | else |
546 | ecomp = &edev->component[components++]; | |
547 | ||
ed09dcc8 | 548 | if (!IS_ERR(ecomp)) { |
08024885 | 549 | ses_get_power_status(edev, ecomp); |
ed09dcc8 DW |
550 | if (addl_desc_ptr) |
551 | ses_process_descriptor( | |
552 | ecomp, | |
553 | addl_desc_ptr); | |
554 | if (create) | |
555 | enclosure_component_register( | |
556 | ecomp); | |
557 | } | |
21fab1d0 JB |
558 | } |
559 | if (desc_ptr) | |
560 | desc_ptr += len; | |
561 | ||
562 | if (addl_desc_ptr) | |
563 | addl_desc_ptr += addl_desc_ptr[1] + 2; | |
564 | ||
565 | } | |
566 | } | |
567 | kfree(buf); | |
568 | kfree(hdr_buf); | |
569 | } | |
570 | ||
9927c688 JB |
571 | static void ses_match_to_enclosure(struct enclosure_device *edev, |
572 | struct scsi_device *sdev) | |
573 | { | |
9927c688 | 574 | unsigned char *desc; |
9927c688 JB |
575 | struct efd efd = { |
576 | .addr = 0, | |
577 | }; | |
9927c688 | 578 | |
21fab1d0 JB |
579 | ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0); |
580 | ||
c38c007a HR |
581 | if (!sdev->vpd_pg83_len) |
582 | return; | |
671a99c8 | 583 | |
c38c007a HR |
584 | desc = sdev->vpd_pg83 + 4; |
585 | while (desc < sdev->vpd_pg83 + sdev->vpd_pg83_len) { | |
9927c688 JB |
586 | enum scsi_protocol proto = desc[0] >> 4; |
587 | u8 code_set = desc[0] & 0x0f; | |
588 | u8 piv = desc[1] & 0x80; | |
589 | u8 assoc = (desc[1] & 0x30) >> 4; | |
590 | u8 type = desc[1] & 0x0f; | |
591 | u8 len = desc[3]; | |
592 | ||
b3f1f9aa | 593 | if (piv && code_set == 1 && assoc == 1 |
9927c688 | 594 | && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8) |
c38c007a | 595 | efd.addr = get_unaligned_be64(&desc[4]); |
9927c688 JB |
596 | |
597 | desc += len + 4; | |
598 | } | |
c38c007a HR |
599 | if (efd.addr) { |
600 | efd.dev = &sdev->sdev_gendev; | |
9927c688 | 601 | |
c38c007a HR |
602 | enclosure_for_each_device(ses_enclosure_find_by_addr, &efd); |
603 | } | |
9927c688 JB |
604 | } |
605 | ||
ee959b00 | 606 | static int ses_intf_add(struct device *cdev, |
9927c688 JB |
607 | struct class_interface *intf) |
608 | { | |
ee959b00 | 609 | struct scsi_device *sdev = to_scsi_device(cdev->parent); |
9927c688 | 610 | struct scsi_device *tmp_sdev; |
21fab1d0 | 611 | unsigned char *buf = NULL, *hdr_buf, *type_ptr; |
9927c688 JB |
612 | struct ses_device *ses_dev; |
613 | u32 result; | |
21fab1d0 | 614 | int i, types, len, components = 0; |
9927c688 | 615 | int err = -ENOMEM; |
8c3adc79 | 616 | int num_enclosures; |
9927c688 | 617 | struct enclosure_device *edev; |
7c46c20a | 618 | struct ses_component *scomp = NULL; |
9927c688 JB |
619 | |
620 | if (!scsi_device_enclosure(sdev)) { | |
621 | /* not an enclosure, but might be in one */ | |
163f52b6 JB |
622 | struct enclosure_device *prev = NULL; |
623 | ||
624 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
9927c688 | 625 | ses_match_to_enclosure(edev, sdev); |
163f52b6 | 626 | prev = edev; |
9927c688 JB |
627 | } |
628 | return -ENODEV; | |
629 | } | |
630 | ||
631 | /* TYPE_ENCLOSURE prints a message in probe */ | |
632 | if (sdev->type != TYPE_ENCLOSURE) | |
633 | sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n"); | |
634 | ||
635 | ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL); | |
636 | hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); | |
637 | if (!hdr_buf || !ses_dev) | |
638 | goto err_init_free; | |
639 | ||
640 | result = ses_recv_diag(sdev, 1, hdr_buf, INIT_ALLOC_SIZE); | |
641 | if (result) | |
642 | goto recv_failed; | |
643 | ||
9927c688 JB |
644 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
645 | buf = kzalloc(len, GFP_KERNEL); | |
646 | if (!buf) | |
647 | goto err_free; | |
648 | ||
9927c688 JB |
649 | result = ses_recv_diag(sdev, 1, buf, len); |
650 | if (result) | |
651 | goto recv_failed; | |
652 | ||
8c3adc79 | 653 | types = 0; |
9927c688 | 654 | |
8c3adc79 JB |
655 | /* we always have one main enclosure and the rest are referred |
656 | * to as secondary subenclosures */ | |
657 | num_enclosures = buf[1] + 1; | |
9927c688 | 658 | |
8c3adc79 JB |
659 | /* begin at the enclosure descriptor */ |
660 | type_ptr = buf + 8; | |
661 | /* skip all the enclosure descriptors */ | |
662 | for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) { | |
663 | types += type_ptr[2]; | |
664 | type_ptr += type_ptr[3] + 4; | |
665 | } | |
666 | ||
667 | ses_dev->page1_types = type_ptr; | |
668 | ses_dev->page1_num_types = types; | |
669 | ||
670 | for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) { | |
9927c688 JB |
671 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || |
672 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
673 | components += type_ptr[1]; | |
674 | } | |
7c46c20a YL |
675 | ses_dev->page1 = buf; |
676 | ses_dev->page1_len = len; | |
677 | buf = NULL; | |
9927c688 JB |
678 | |
679 | result = ses_recv_diag(sdev, 2, hdr_buf, INIT_ALLOC_SIZE); | |
680 | if (result) | |
681 | goto recv_failed; | |
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 | /* make sure getting page 2 actually works */ | |
689 | result = ses_recv_diag(sdev, 2, buf, len); | |
690 | if (result) | |
691 | goto recv_failed; | |
692 | ses_dev->page2 = buf; | |
693 | ses_dev->page2_len = len; | |
7c46c20a | 694 | buf = NULL; |
9927c688 JB |
695 | |
696 | /* The additional information page --- allows us | |
697 | * to match up the devices */ | |
698 | result = ses_recv_diag(sdev, 10, hdr_buf, INIT_ALLOC_SIZE); | |
691b4773 YL |
699 | if (!result) { |
700 | ||
701 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
702 | buf = kzalloc(len, GFP_KERNEL); | |
703 | if (!buf) | |
704 | goto err_free; | |
705 | ||
706 | result = ses_recv_diag(sdev, 10, buf, len); | |
707 | if (result) | |
708 | goto recv_failed; | |
709 | ses_dev->page10 = buf; | |
710 | ses_dev->page10_len = len; | |
711 | buf = NULL; | |
712 | } | |
7c46c20a | 713 | scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL); |
9927c688 | 714 | if (!scomp) |
7c46c20a | 715 | goto err_free; |
9927c688 | 716 | |
71610f55 | 717 | edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev), |
9927c688 JB |
718 | components, &ses_enclosure_callbacks); |
719 | if (IS_ERR(edev)) { | |
720 | err = PTR_ERR(edev); | |
721 | goto err_free; | |
722 | } | |
723 | ||
9b3a6549 JL |
724 | kfree(hdr_buf); |
725 | ||
9927c688 JB |
726 | edev->scratch = ses_dev; |
727 | for (i = 0; i < components; i++) | |
7c46c20a | 728 | edev->component[i].scratch = scomp + i; |
9927c688 | 729 | |
21fab1d0 | 730 | ses_enclosure_data_process(edev, sdev, 1); |
9927c688 JB |
731 | |
732 | /* see if there are any devices matching before | |
733 | * we found the enclosure */ | |
734 | shost_for_each_device(tmp_sdev, sdev->host) { | |
735 | if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) | |
736 | continue; | |
737 | ses_match_to_enclosure(edev, tmp_sdev); | |
738 | } | |
739 | ||
740 | return 0; | |
741 | ||
742 | recv_failed: | |
743 | sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n", | |
744 | result); | |
745 | err = -ENODEV; | |
746 | err_free: | |
747 | kfree(buf); | |
7c46c20a | 748 | kfree(scomp); |
9927c688 JB |
749 | kfree(ses_dev->page10); |
750 | kfree(ses_dev->page2); | |
751 | kfree(ses_dev->page1); | |
752 | err_init_free: | |
753 | kfree(ses_dev); | |
754 | kfree(hdr_buf); | |
755 | sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err); | |
756 | return err; | |
757 | } | |
758 | ||
759 | static int ses_remove(struct device *dev) | |
760 | { | |
761 | return 0; | |
762 | } | |
763 | ||
43d8eb9c JB |
764 | static void ses_intf_remove_component(struct scsi_device *sdev) |
765 | { | |
766 | struct enclosure_device *edev, *prev = NULL; | |
767 | ||
768 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
769 | prev = edev; | |
770 | if (!enclosure_remove_device(edev, &sdev->sdev_gendev)) | |
771 | break; | |
772 | } | |
773 | if (edev) | |
774 | put_device(&edev->edev); | |
775 | } | |
776 | ||
777 | static void ses_intf_remove_enclosure(struct scsi_device *sdev) | |
9927c688 | 778 | { |
9927c688 JB |
779 | struct enclosure_device *edev; |
780 | struct ses_device *ses_dev; | |
781 | ||
163f52b6 | 782 | /* exact match to this enclosure */ |
43d8eb9c | 783 | edev = enclosure_find(&sdev->sdev_gendev, NULL); |
9927c688 JB |
784 | if (!edev) |
785 | return; | |
786 | ||
787 | ses_dev = edev->scratch; | |
788 | edev->scratch = NULL; | |
789 | ||
7c46c20a | 790 | kfree(ses_dev->page10); |
9927c688 JB |
791 | kfree(ses_dev->page1); |
792 | kfree(ses_dev->page2); | |
793 | kfree(ses_dev); | |
794 | ||
795 | kfree(edev->component[0].scratch); | |
796 | ||
ee959b00 | 797 | put_device(&edev->edev); |
9927c688 JB |
798 | enclosure_unregister(edev); |
799 | } | |
800 | ||
43d8eb9c JB |
801 | static void ses_intf_remove(struct device *cdev, |
802 | struct class_interface *intf) | |
803 | { | |
804 | struct scsi_device *sdev = to_scsi_device(cdev->parent); | |
805 | ||
806 | if (!scsi_device_enclosure(sdev)) | |
807 | ses_intf_remove_component(sdev); | |
808 | else | |
809 | ses_intf_remove_enclosure(sdev); | |
810 | } | |
811 | ||
9927c688 | 812 | static struct class_interface ses_interface = { |
ee959b00 TJ |
813 | .add_dev = ses_intf_add, |
814 | .remove_dev = ses_intf_remove, | |
9927c688 JB |
815 | }; |
816 | ||
817 | static struct scsi_driver ses_template = { | |
9927c688 JB |
818 | .gendrv = { |
819 | .name = "ses", | |
3af6b352 | 820 | .owner = THIS_MODULE, |
9927c688 JB |
821 | .probe = ses_probe, |
822 | .remove = ses_remove, | |
823 | }, | |
824 | }; | |
825 | ||
826 | static int __init ses_init(void) | |
827 | { | |
828 | int err; | |
829 | ||
830 | err = scsi_register_interface(&ses_interface); | |
831 | if (err) | |
832 | return err; | |
833 | ||
834 | err = scsi_register_driver(&ses_template.gendrv); | |
835 | if (err) | |
836 | goto out_unreg; | |
837 | ||
838 | return 0; | |
839 | ||
840 | out_unreg: | |
841 | scsi_unregister_interface(&ses_interface); | |
842 | return err; | |
843 | } | |
844 | ||
845 | static void __exit ses_exit(void) | |
846 | { | |
847 | scsi_unregister_driver(&ses_template.gendrv); | |
848 | scsi_unregister_interface(&ses_interface); | |
849 | } | |
850 | ||
851 | module_init(ses_init); | |
852 | module_exit(ses_exit); | |
853 | ||
854 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE); | |
855 | ||
856 | MODULE_AUTHOR("James Bottomley"); | |
857 | MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver"); | |
858 | MODULE_LICENSE("GPL v2"); |