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 | ||
3f8d6f2a JB |
37 | #include <scsi/scsi_transport_sas.h> |
38 | ||
9927c688 | 39 | struct ses_device { |
691b4773 | 40 | unsigned char *page1; |
8c3adc79 | 41 | unsigned char *page1_types; |
691b4773 YL |
42 | unsigned char *page2; |
43 | unsigned char *page10; | |
9927c688 | 44 | short page1_len; |
8c3adc79 | 45 | short page1_num_types; |
9927c688 JB |
46 | short page2_len; |
47 | short page10_len; | |
48 | }; | |
49 | ||
50 | struct ses_component { | |
51 | u64 addr; | |
9927c688 JB |
52 | }; |
53 | ||
dc56ce12 HR |
54 | static bool ses_page2_supported(struct enclosure_device *edev) |
55 | { | |
56 | struct ses_device *ses_dev = edev->scratch; | |
57 | ||
58 | return (ses_dev->page2 != NULL); | |
59 | } | |
60 | ||
9927c688 JB |
61 | static int ses_probe(struct device *dev) |
62 | { | |
63 | struct scsi_device *sdev = to_scsi_device(dev); | |
64 | int err = -ENODEV; | |
65 | ||
66 | if (sdev->type != TYPE_ENCLOSURE) | |
67 | goto out; | |
68 | ||
69 | err = 0; | |
70 | sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n"); | |
71 | ||
72 | out: | |
73 | return err; | |
74 | } | |
75 | ||
c95e62ce | 76 | #define SES_TIMEOUT (30 * HZ) |
9927c688 JB |
77 | #define SES_RETRIES 3 |
78 | ||
08024885 SL |
79 | static void init_device_slot_control(unsigned char *dest_desc, |
80 | struct enclosure_component *ecomp, | |
81 | unsigned char *status) | |
82 | { | |
83 | memcpy(dest_desc, status, 4); | |
84 | dest_desc[0] = 0; | |
85 | /* only clear byte 1 for ENCLOSURE_COMPONENT_DEVICE */ | |
86 | if (ecomp->type == ENCLOSURE_COMPONENT_DEVICE) | |
87 | dest_desc[1] = 0; | |
88 | dest_desc[2] &= 0xde; | |
89 | dest_desc[3] &= 0x3c; | |
90 | } | |
91 | ||
92 | ||
9927c688 JB |
93 | static int ses_recv_diag(struct scsi_device *sdev, int page_code, |
94 | void *buf, int bufflen) | |
95 | { | |
3417c1b5 | 96 | int ret; |
691b4773 | 97 | unsigned char cmd[] = { |
9927c688 JB |
98 | RECEIVE_DIAGNOSTIC, |
99 | 1, /* Set PCV bit */ | |
100 | page_code, | |
101 | bufflen >> 8, | |
102 | bufflen & 0xff, | |
103 | 0 | |
104 | }; | |
3417c1b5 | 105 | unsigned char recv_page_code; |
9927c688 | 106 | |
3417c1b5 | 107 | ret = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen, |
f4f4e47e | 108 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
424f727b | 109 | if (unlikely(ret)) |
3417c1b5 JB |
110 | return ret; |
111 | ||
112 | recv_page_code = ((unsigned char *)buf)[0]; | |
113 | ||
114 | if (likely(recv_page_code == page_code)) | |
115 | return ret; | |
116 | ||
117 | /* successful diagnostic but wrong page code. This happens to some | |
118 | * USB devices, just print a message and pretend there was an error */ | |
119 | ||
120 | sdev_printk(KERN_ERR, sdev, | |
121 | "Wrong diagnostic page; asked for %d got %u\n", | |
122 | page_code, recv_page_code); | |
123 | ||
124 | return -EINVAL; | |
9927c688 JB |
125 | } |
126 | ||
127 | static int ses_send_diag(struct scsi_device *sdev, int page_code, | |
128 | void *buf, int bufflen) | |
129 | { | |
130 | u32 result; | |
131 | ||
691b4773 | 132 | unsigned char cmd[] = { |
9927c688 JB |
133 | SEND_DIAGNOSTIC, |
134 | 0x10, /* Set PF bit */ | |
135 | 0, | |
136 | bufflen >> 8, | |
137 | bufflen & 0xff, | |
138 | 0 | |
139 | }; | |
140 | ||
141 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen, | |
f4f4e47e | 142 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
143 | if (result) |
144 | sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n", | |
145 | result); | |
146 | return result; | |
147 | } | |
148 | ||
149 | static int ses_set_page2_descriptor(struct enclosure_device *edev, | |
150 | struct enclosure_component *ecomp, | |
691b4773 | 151 | unsigned char *desc) |
9927c688 JB |
152 | { |
153 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 154 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 155 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 156 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 157 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 JB |
158 | |
159 | /* Clear everything */ | |
160 | memset(desc_ptr, 0, ses_dev->page2_len - 8); | |
8c3adc79 | 161 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
162 | for (j = 0; j < type_ptr[1]; j++) { |
163 | desc_ptr += 4; | |
164 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && | |
165 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
166 | continue; | |
167 | if (count++ == descriptor) { | |
168 | memcpy(desc_ptr, desc, 4); | |
169 | /* set select */ | |
170 | desc_ptr[0] |= 0x80; | |
171 | /* clear reserved, just in case */ | |
172 | desc_ptr[0] &= 0xf0; | |
173 | } | |
174 | } | |
175 | } | |
176 | ||
177 | return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); | |
178 | } | |
179 | ||
691b4773 | 180 | static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev, |
9927c688 JB |
181 | struct enclosure_component *ecomp) |
182 | { | |
183 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 184 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 185 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 186 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 187 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 | 188 | |
acf8ab9a HR |
189 | if (ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len) < 0) |
190 | return NULL; | |
9927c688 | 191 | |
8c3adc79 | 192 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
193 | for (j = 0; j < type_ptr[1]; j++) { |
194 | desc_ptr += 4; | |
195 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && | |
196 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
197 | continue; | |
198 | if (count++ == descriptor) | |
199 | return desc_ptr; | |
200 | } | |
201 | } | |
202 | return NULL; | |
203 | } | |
204 | ||
2a350cab DG |
205 | /* For device slot and array device slot elements, byte 3 bit 6 |
206 | * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this | |
207 | * code stands these bits are shifted 4 positions right so in | |
208 | * sysfs they will appear as bits 2 and 1 respectively. Strange. */ | |
9927c688 JB |
209 | static void ses_get_fault(struct enclosure_device *edev, |
210 | struct enclosure_component *ecomp) | |
211 | { | |
691b4773 | 212 | unsigned char *desc; |
9927c688 | 213 | |
dc56ce12 HR |
214 | if (!ses_page2_supported(edev)) { |
215 | ecomp->fault = 0; | |
216 | return; | |
217 | } | |
9927c688 | 218 | desc = ses_get_page2_descriptor(edev, ecomp); |
691b4773 YL |
219 | if (desc) |
220 | ecomp->fault = (desc[3] & 0x60) >> 4; | |
9927c688 JB |
221 | } |
222 | ||
223 | static int ses_set_fault(struct enclosure_device *edev, | |
224 | struct enclosure_component *ecomp, | |
225 | enum enclosure_component_setting val) | |
226 | { | |
08024885 SL |
227 | unsigned char desc[4]; |
228 | unsigned char *desc_ptr; | |
229 | ||
dc56ce12 HR |
230 | if (!ses_page2_supported(edev)) |
231 | return -EINVAL; | |
232 | ||
08024885 SL |
233 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); |
234 | ||
235 | if (!desc_ptr) | |
236 | return -EIO; | |
237 | ||
238 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
239 | |
240 | switch (val) { | |
241 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 242 | desc[3] &= 0xdf; |
9927c688 JB |
243 | break; |
244 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 245 | desc[3] |= 0x20; |
9927c688 JB |
246 | break; |
247 | default: | |
248 | /* SES doesn't do the SGPIO blink settings */ | |
249 | return -EINVAL; | |
250 | } | |
251 | ||
252 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
253 | } | |
254 | ||
255 | static void ses_get_status(struct enclosure_device *edev, | |
256 | struct enclosure_component *ecomp) | |
257 | { | |
691b4773 | 258 | unsigned char *desc; |
9927c688 | 259 | |
dc56ce12 HR |
260 | if (!ses_page2_supported(edev)) { |
261 | ecomp->status = 0; | |
262 | return; | |
263 | } | |
9927c688 | 264 | desc = ses_get_page2_descriptor(edev, ecomp); |
691b4773 YL |
265 | if (desc) |
266 | ecomp->status = (desc[0] & 0x0f); | |
9927c688 JB |
267 | } |
268 | ||
269 | static void ses_get_locate(struct enclosure_device *edev, | |
270 | struct enclosure_component *ecomp) | |
271 | { | |
691b4773 | 272 | unsigned char *desc; |
9927c688 | 273 | |
dc56ce12 HR |
274 | if (!ses_page2_supported(edev)) { |
275 | ecomp->locate = 0; | |
276 | return; | |
277 | } | |
9927c688 | 278 | desc = ses_get_page2_descriptor(edev, ecomp); |
691b4773 YL |
279 | if (desc) |
280 | ecomp->locate = (desc[2] & 0x02) ? 1 : 0; | |
9927c688 JB |
281 | } |
282 | ||
283 | static int ses_set_locate(struct enclosure_device *edev, | |
284 | struct enclosure_component *ecomp, | |
285 | enum enclosure_component_setting val) | |
286 | { | |
08024885 SL |
287 | unsigned char desc[4]; |
288 | unsigned char *desc_ptr; | |
289 | ||
dc56ce12 HR |
290 | if (!ses_page2_supported(edev)) |
291 | return -EINVAL; | |
292 | ||
08024885 SL |
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] &= 0xfd; |
9927c688 JB |
303 | break; |
304 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 305 | desc[2] |= 0x02; |
9927c688 JB |
306 | break; |
307 | default: | |
308 | /* SES doesn't do the SGPIO blink settings */ | |
309 | return -EINVAL; | |
310 | } | |
311 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
312 | } | |
313 | ||
314 | static int ses_set_active(struct enclosure_device *edev, | |
315 | struct enclosure_component *ecomp, | |
316 | enum enclosure_component_setting val) | |
317 | { | |
08024885 SL |
318 | unsigned char desc[4]; |
319 | unsigned char *desc_ptr; | |
320 | ||
dc56ce12 HR |
321 | if (!ses_page2_supported(edev)) |
322 | return -EINVAL; | |
323 | ||
08024885 SL |
324 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); |
325 | ||
326 | if (!desc_ptr) | |
327 | return -EIO; | |
328 | ||
329 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
330 | |
331 | switch (val) { | |
332 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 333 | desc[2] &= 0x7f; |
9927c688 JB |
334 | ecomp->active = 0; |
335 | break; | |
336 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 337 | desc[2] |= 0x80; |
9927c688 JB |
338 | ecomp->active = 1; |
339 | break; | |
340 | default: | |
341 | /* SES doesn't do the SGPIO blink settings */ | |
342 | return -EINVAL; | |
343 | } | |
344 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
345 | } | |
346 | ||
967f7bab DW |
347 | static int ses_show_id(struct enclosure_device *edev, char *buf) |
348 | { | |
349 | struct ses_device *ses_dev = edev->scratch; | |
350 | unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4); | |
351 | ||
352 | return sprintf(buf, "%#llx\n", id); | |
353 | } | |
354 | ||
08024885 SL |
355 | static void ses_get_power_status(struct enclosure_device *edev, |
356 | struct enclosure_component *ecomp) | |
357 | { | |
358 | unsigned char *desc; | |
359 | ||
dc56ce12 HR |
360 | if (!ses_page2_supported(edev)) { |
361 | ecomp->power_status = 0; | |
362 | return; | |
363 | } | |
364 | ||
08024885 SL |
365 | desc = ses_get_page2_descriptor(edev, ecomp); |
366 | if (desc) | |
367 | ecomp->power_status = (desc[3] & 0x10) ? 0 : 1; | |
368 | } | |
369 | ||
370 | static int ses_set_power_status(struct enclosure_device *edev, | |
371 | struct enclosure_component *ecomp, | |
372 | int val) | |
373 | { | |
374 | unsigned char desc[4]; | |
375 | unsigned char *desc_ptr; | |
376 | ||
dc56ce12 HR |
377 | if (!ses_page2_supported(edev)) |
378 | return -EINVAL; | |
379 | ||
08024885 SL |
380 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); |
381 | ||
382 | if (!desc_ptr) | |
383 | return -EIO; | |
384 | ||
385 | init_device_slot_control(desc, ecomp, desc_ptr); | |
386 | ||
387 | switch (val) { | |
388 | /* power = 1 is device_off = 0 and vice versa */ | |
389 | case 0: | |
390 | desc[3] |= 0x10; | |
391 | break; | |
392 | case 1: | |
393 | desc[3] &= 0xef; | |
394 | break; | |
395 | default: | |
396 | return -EINVAL; | |
397 | } | |
398 | ecomp->power_status = val; | |
399 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
400 | } | |
401 | ||
9927c688 JB |
402 | static struct enclosure_component_callbacks ses_enclosure_callbacks = { |
403 | .get_fault = ses_get_fault, | |
404 | .set_fault = ses_set_fault, | |
405 | .get_status = ses_get_status, | |
406 | .get_locate = ses_get_locate, | |
407 | .set_locate = ses_set_locate, | |
08024885 SL |
408 | .get_power_status = ses_get_power_status, |
409 | .set_power_status = ses_set_power_status, | |
9927c688 | 410 | .set_active = ses_set_active, |
967f7bab | 411 | .show_id = ses_show_id, |
9927c688 JB |
412 | }; |
413 | ||
414 | struct ses_host_edev { | |
415 | struct Scsi_Host *shost; | |
416 | struct enclosure_device *edev; | |
417 | }; | |
418 | ||
e0aae1a5 | 419 | #if 0 |
9927c688 JB |
420 | int ses_match_host(struct enclosure_device *edev, void *data) |
421 | { | |
422 | struct ses_host_edev *sed = data; | |
423 | struct scsi_device *sdev; | |
424 | ||
ee959b00 | 425 | if (!scsi_is_sdev_device(edev->edev.parent)) |
9927c688 JB |
426 | return 0; |
427 | ||
ee959b00 | 428 | sdev = to_scsi_device(edev->edev.parent); |
9927c688 JB |
429 | |
430 | if (sdev->host != sed->shost) | |
431 | return 0; | |
432 | ||
433 | sed->edev = edev; | |
434 | return 1; | |
435 | } | |
e0aae1a5 | 436 | #endif /* 0 */ |
9927c688 JB |
437 | |
438 | static void ses_process_descriptor(struct enclosure_component *ecomp, | |
439 | unsigned char *desc) | |
440 | { | |
441 | int eip = desc[0] & 0x10; | |
442 | int invalid = desc[0] & 0x80; | |
443 | enum scsi_protocol proto = desc[0] & 0x0f; | |
444 | u64 addr = 0; | |
921ce7f5 | 445 | int slot = -1; |
9927c688 JB |
446 | struct ses_component *scomp = ecomp->scratch; |
447 | unsigned char *d; | |
448 | ||
9927c688 JB |
449 | if (invalid) |
450 | return; | |
451 | ||
452 | switch (proto) { | |
921ce7f5 DW |
453 | case SCSI_PROTOCOL_FCP: |
454 | if (eip) { | |
455 | d = desc + 4; | |
456 | slot = d[3]; | |
457 | } | |
458 | break; | |
9927c688 | 459 | case SCSI_PROTOCOL_SAS: |
921ce7f5 DW |
460 | if (eip) { |
461 | d = desc + 4; | |
462 | slot = d[3]; | |
9927c688 | 463 | d = desc + 8; |
921ce7f5 | 464 | } else |
9927c688 JB |
465 | d = desc + 4; |
466 | /* only take the phy0 addr */ | |
467 | addr = (u64)d[12] << 56 | | |
468 | (u64)d[13] << 48 | | |
469 | (u64)d[14] << 40 | | |
470 | (u64)d[15] << 32 | | |
471 | (u64)d[16] << 24 | | |
472 | (u64)d[17] << 16 | | |
473 | (u64)d[18] << 8 | | |
474 | (u64)d[19]; | |
475 | break; | |
476 | default: | |
477 | /* FIXME: Need to add more protocols than just SAS */ | |
478 | break; | |
479 | } | |
921ce7f5 | 480 | ecomp->slot = slot; |
9927c688 JB |
481 | scomp->addr = addr; |
482 | } | |
483 | ||
484 | struct efd { | |
485 | u64 addr; | |
486 | struct device *dev; | |
487 | }; | |
488 | ||
489 | static int ses_enclosure_find_by_addr(struct enclosure_device *edev, | |
490 | void *data) | |
491 | { | |
492 | struct efd *efd = data; | |
493 | int i; | |
494 | struct ses_component *scomp; | |
495 | ||
496 | if (!edev->component[0].scratch) | |
497 | return 0; | |
498 | ||
499 | for (i = 0; i < edev->components; i++) { | |
500 | scomp = edev->component[i].scratch; | |
501 | if (scomp->addr != efd->addr) | |
502 | continue; | |
503 | ||
15a0fbbc DW |
504 | if (enclosure_add_device(edev, i, efd->dev) == 0) |
505 | kobject_uevent(&efd->dev->kobj, KOBJ_CHANGE); | |
9927c688 JB |
506 | return 1; |
507 | } | |
508 | return 0; | |
509 | } | |
510 | ||
21fab1d0 JB |
511 | #define INIT_ALLOC_SIZE 32 |
512 | ||
513 | static void ses_enclosure_data_process(struct enclosure_device *edev, | |
514 | struct scsi_device *sdev, | |
515 | int create) | |
516 | { | |
517 | u32 result; | |
518 | unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL; | |
519 | int i, j, page7_len, len, components; | |
520 | struct ses_device *ses_dev = edev->scratch; | |
8c3adc79 | 521 | int types = ses_dev->page1_num_types; |
21fab1d0 JB |
522 | unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); |
523 | ||
524 | if (!hdr_buf) | |
525 | goto simple_populate; | |
526 | ||
527 | /* re-read page 10 */ | |
528 | if (ses_dev->page10) | |
529 | ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len); | |
530 | /* Page 7 for the descriptors is optional */ | |
531 | result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE); | |
532 | if (result) | |
533 | goto simple_populate; | |
534 | ||
535 | page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
536 | /* add 1 for trailing '\0' we'll use */ | |
537 | buf = kzalloc(len + 1, GFP_KERNEL); | |
538 | if (!buf) | |
539 | goto simple_populate; | |
540 | result = ses_recv_diag(sdev, 7, buf, len); | |
541 | if (result) { | |
542 | simple_populate: | |
543 | kfree(buf); | |
544 | buf = NULL; | |
545 | desc_ptr = NULL; | |
546 | len = 0; | |
547 | page7_len = 0; | |
548 | } else { | |
549 | desc_ptr = buf + 8; | |
550 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
551 | /* skip past overall descriptor */ | |
552 | desc_ptr += len + 4; | |
21fab1d0 | 553 | } |
877a5597 JH |
554 | if (ses_dev->page10) |
555 | addl_desc_ptr = ses_dev->page10 + 8; | |
8c3adc79 | 556 | type_ptr = ses_dev->page1_types; |
21fab1d0 JB |
557 | components = 0; |
558 | for (i = 0; i < types; i++, type_ptr += 4) { | |
559 | for (j = 0; j < type_ptr[1]; j++) { | |
560 | char *name = NULL; | |
561 | struct enclosure_component *ecomp; | |
562 | ||
563 | if (desc_ptr) { | |
564 | if (desc_ptr >= buf + page7_len) { | |
565 | desc_ptr = NULL; | |
566 | } else { | |
567 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
568 | desc_ptr += 4; | |
569 | /* Add trailing zero - pushes into | |
570 | * reserved space */ | |
571 | desc_ptr[len] = '\0'; | |
572 | name = desc_ptr; | |
573 | } | |
574 | } | |
575 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
576 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) { | |
577 | ||
578 | if (create) | |
ed09dcc8 DW |
579 | ecomp = enclosure_component_alloc( |
580 | edev, | |
581 | components++, | |
582 | type_ptr[0], | |
583 | name); | |
21fab1d0 JB |
584 | else |
585 | ecomp = &edev->component[components++]; | |
586 | ||
ed09dcc8 DW |
587 | if (!IS_ERR(ecomp)) { |
588 | if (addl_desc_ptr) | |
589 | ses_process_descriptor( | |
590 | ecomp, | |
591 | addl_desc_ptr); | |
592 | if (create) | |
593 | enclosure_component_register( | |
594 | ecomp); | |
595 | } | |
21fab1d0 JB |
596 | } |
597 | if (desc_ptr) | |
598 | desc_ptr += len; | |
599 | ||
5e103356 JB |
600 | if (addl_desc_ptr && |
601 | /* only find additional descriptions for specific devices */ | |
602 | (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
603 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE || | |
604 | type_ptr[0] == ENCLOSURE_COMPONENT_SAS_EXPANDER || | |
605 | /* these elements are optional */ | |
606 | type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_TARGET_PORT || | |
607 | type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_INITIATOR_PORT || | |
608 | type_ptr[0] == ENCLOSURE_COMPONENT_CONTROLLER_ELECTRONICS)) | |
21fab1d0 JB |
609 | addl_desc_ptr += addl_desc_ptr[1] + 2; |
610 | ||
611 | } | |
612 | } | |
613 | kfree(buf); | |
614 | kfree(hdr_buf); | |
615 | } | |
616 | ||
9927c688 | 617 | static void ses_match_to_enclosure(struct enclosure_device *edev, |
9c0a5002 LD |
618 | struct scsi_device *sdev, |
619 | int refresh) | |
9927c688 | 620 | { |
9c0a5002 | 621 | struct scsi_device *edev_sdev = to_scsi_device(edev->edev.parent); |
9927c688 JB |
622 | struct efd efd = { |
623 | .addr = 0, | |
624 | }; | |
9927c688 | 625 | |
9c0a5002 LD |
626 | if (refresh) |
627 | ses_enclosure_data_process(edev, edev_sdev, 0); | |
21fab1d0 | 628 | |
9373eba6 | 629 | if (scsi_is_sas_rphy(sdev->sdev_target->dev.parent)) |
3f8d6f2a | 630 | efd.addr = sas_get_address(sdev); |
9927c688 | 631 | |
c38c007a HR |
632 | if (efd.addr) { |
633 | efd.dev = &sdev->sdev_gendev; | |
9927c688 | 634 | |
c38c007a HR |
635 | enclosure_for_each_device(ses_enclosure_find_by_addr, &efd); |
636 | } | |
9927c688 JB |
637 | } |
638 | ||
ee959b00 | 639 | static int ses_intf_add(struct device *cdev, |
9927c688 JB |
640 | struct class_interface *intf) |
641 | { | |
ee959b00 | 642 | struct scsi_device *sdev = to_scsi_device(cdev->parent); |
9927c688 | 643 | struct scsi_device *tmp_sdev; |
81b59d75 | 644 | unsigned char *buf = NULL, *hdr_buf, *type_ptr, page; |
9927c688 JB |
645 | struct ses_device *ses_dev; |
646 | u32 result; | |
21fab1d0 | 647 | int i, types, len, components = 0; |
9927c688 | 648 | int err = -ENOMEM; |
8c3adc79 | 649 | int num_enclosures; |
9927c688 | 650 | struct enclosure_device *edev; |
7c46c20a | 651 | struct ses_component *scomp = NULL; |
9927c688 JB |
652 | |
653 | if (!scsi_device_enclosure(sdev)) { | |
654 | /* not an enclosure, but might be in one */ | |
163f52b6 JB |
655 | struct enclosure_device *prev = NULL; |
656 | ||
657 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
9c0a5002 | 658 | ses_match_to_enclosure(edev, sdev, 1); |
163f52b6 | 659 | prev = edev; |
9927c688 JB |
660 | } |
661 | return -ENODEV; | |
662 | } | |
663 | ||
664 | /* TYPE_ENCLOSURE prints a message in probe */ | |
665 | if (sdev->type != TYPE_ENCLOSURE) | |
666 | sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n"); | |
667 | ||
668 | ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL); | |
669 | hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); | |
670 | if (!hdr_buf || !ses_dev) | |
671 | goto err_init_free; | |
672 | ||
81b59d75 HR |
673 | page = 1; |
674 | result = ses_recv_diag(sdev, page, hdr_buf, INIT_ALLOC_SIZE); | |
9927c688 JB |
675 | if (result) |
676 | goto recv_failed; | |
677 | ||
9927c688 JB |
678 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
679 | buf = kzalloc(len, GFP_KERNEL); | |
680 | if (!buf) | |
681 | goto err_free; | |
682 | ||
81b59d75 | 683 | result = ses_recv_diag(sdev, page, buf, len); |
9927c688 JB |
684 | if (result) |
685 | goto recv_failed; | |
686 | ||
8c3adc79 | 687 | types = 0; |
9927c688 | 688 | |
8c3adc79 JB |
689 | /* we always have one main enclosure and the rest are referred |
690 | * to as secondary subenclosures */ | |
691 | num_enclosures = buf[1] + 1; | |
9927c688 | 692 | |
8c3adc79 JB |
693 | /* begin at the enclosure descriptor */ |
694 | type_ptr = buf + 8; | |
695 | /* skip all the enclosure descriptors */ | |
696 | for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) { | |
697 | types += type_ptr[2]; | |
698 | type_ptr += type_ptr[3] + 4; | |
699 | } | |
700 | ||
701 | ses_dev->page1_types = type_ptr; | |
702 | ses_dev->page1_num_types = types; | |
703 | ||
704 | for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) { | |
9927c688 JB |
705 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || |
706 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
707 | components += type_ptr[1]; | |
708 | } | |
7c46c20a YL |
709 | ses_dev->page1 = buf; |
710 | ses_dev->page1_len = len; | |
711 | buf = NULL; | |
9927c688 | 712 | |
81b59d75 HR |
713 | page = 2; |
714 | result = ses_recv_diag(sdev, page, hdr_buf, INIT_ALLOC_SIZE); | |
9927c688 | 715 | if (result) |
dc56ce12 | 716 | goto page2_not_supported; |
9927c688 JB |
717 | |
718 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
719 | buf = kzalloc(len, GFP_KERNEL); | |
720 | if (!buf) | |
721 | goto err_free; | |
722 | ||
723 | /* make sure getting page 2 actually works */ | |
724 | result = ses_recv_diag(sdev, 2, buf, len); | |
725 | if (result) | |
726 | goto recv_failed; | |
727 | ses_dev->page2 = buf; | |
728 | ses_dev->page2_len = len; | |
7c46c20a | 729 | buf = NULL; |
9927c688 JB |
730 | |
731 | /* The additional information page --- allows us | |
732 | * to match up the devices */ | |
81b59d75 HR |
733 | page = 10; |
734 | result = ses_recv_diag(sdev, page, hdr_buf, INIT_ALLOC_SIZE); | |
691b4773 YL |
735 | if (!result) { |
736 | ||
737 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
738 | buf = kzalloc(len, GFP_KERNEL); | |
739 | if (!buf) | |
740 | goto err_free; | |
741 | ||
81b59d75 | 742 | result = ses_recv_diag(sdev, page, buf, len); |
691b4773 YL |
743 | if (result) |
744 | goto recv_failed; | |
745 | ses_dev->page10 = buf; | |
746 | ses_dev->page10_len = len; | |
747 | buf = NULL; | |
748 | } | |
dc56ce12 | 749 | page2_not_supported: |
6396bb22 | 750 | scomp = kcalloc(components, sizeof(struct ses_component), GFP_KERNEL); |
9927c688 | 751 | if (!scomp) |
7c46c20a | 752 | goto err_free; |
9927c688 | 753 | |
71610f55 | 754 | edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev), |
9927c688 JB |
755 | components, &ses_enclosure_callbacks); |
756 | if (IS_ERR(edev)) { | |
757 | err = PTR_ERR(edev); | |
758 | goto err_free; | |
759 | } | |
760 | ||
9b3a6549 JL |
761 | kfree(hdr_buf); |
762 | ||
9927c688 JB |
763 | edev->scratch = ses_dev; |
764 | for (i = 0; i < components; i++) | |
7c46c20a | 765 | edev->component[i].scratch = scomp + i; |
9927c688 | 766 | |
21fab1d0 | 767 | ses_enclosure_data_process(edev, sdev, 1); |
9927c688 JB |
768 | |
769 | /* see if there are any devices matching before | |
770 | * we found the enclosure */ | |
771 | shost_for_each_device(tmp_sdev, sdev->host) { | |
772 | if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) | |
773 | continue; | |
9c0a5002 | 774 | ses_match_to_enclosure(edev, tmp_sdev, 0); |
9927c688 JB |
775 | } |
776 | ||
777 | return 0; | |
778 | ||
779 | recv_failed: | |
780 | sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n", | |
81b59d75 | 781 | page); |
9927c688 JB |
782 | err = -ENODEV; |
783 | err_free: | |
784 | kfree(buf); | |
7c46c20a | 785 | kfree(scomp); |
9927c688 JB |
786 | kfree(ses_dev->page10); |
787 | kfree(ses_dev->page2); | |
788 | kfree(ses_dev->page1); | |
789 | err_init_free: | |
790 | kfree(ses_dev); | |
791 | kfree(hdr_buf); | |
792 | sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err); | |
793 | return err; | |
794 | } | |
795 | ||
796 | static int ses_remove(struct device *dev) | |
797 | { | |
798 | return 0; | |
799 | } | |
800 | ||
43d8eb9c JB |
801 | static void ses_intf_remove_component(struct scsi_device *sdev) |
802 | { | |
803 | struct enclosure_device *edev, *prev = NULL; | |
804 | ||
805 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
806 | prev = edev; | |
807 | if (!enclosure_remove_device(edev, &sdev->sdev_gendev)) | |
808 | break; | |
809 | } | |
810 | if (edev) | |
811 | put_device(&edev->edev); | |
812 | } | |
813 | ||
814 | static void ses_intf_remove_enclosure(struct scsi_device *sdev) | |
9927c688 | 815 | { |
9927c688 JB |
816 | struct enclosure_device *edev; |
817 | struct ses_device *ses_dev; | |
818 | ||
163f52b6 | 819 | /* exact match to this enclosure */ |
43d8eb9c | 820 | edev = enclosure_find(&sdev->sdev_gendev, NULL); |
9927c688 JB |
821 | if (!edev) |
822 | return; | |
823 | ||
824 | ses_dev = edev->scratch; | |
825 | edev->scratch = NULL; | |
826 | ||
7c46c20a | 827 | kfree(ses_dev->page10); |
9927c688 JB |
828 | kfree(ses_dev->page1); |
829 | kfree(ses_dev->page2); | |
830 | kfree(ses_dev); | |
831 | ||
832 | kfree(edev->component[0].scratch); | |
833 | ||
ee959b00 | 834 | put_device(&edev->edev); |
a5a039b0 | 835 | enclosure_unregister(edev); |
9927c688 JB |
836 | } |
837 | ||
43d8eb9c JB |
838 | static void ses_intf_remove(struct device *cdev, |
839 | struct class_interface *intf) | |
840 | { | |
841 | struct scsi_device *sdev = to_scsi_device(cdev->parent); | |
842 | ||
843 | if (!scsi_device_enclosure(sdev)) | |
844 | ses_intf_remove_component(sdev); | |
845 | else | |
846 | ses_intf_remove_enclosure(sdev); | |
847 | } | |
848 | ||
9927c688 | 849 | static struct class_interface ses_interface = { |
ee959b00 TJ |
850 | .add_dev = ses_intf_add, |
851 | .remove_dev = ses_intf_remove, | |
9927c688 JB |
852 | }; |
853 | ||
854 | static struct scsi_driver ses_template = { | |
9927c688 JB |
855 | .gendrv = { |
856 | .name = "ses", | |
3af6b352 | 857 | .owner = THIS_MODULE, |
9927c688 JB |
858 | .probe = ses_probe, |
859 | .remove = ses_remove, | |
860 | }, | |
861 | }; | |
862 | ||
863 | static int __init ses_init(void) | |
864 | { | |
865 | int err; | |
866 | ||
867 | err = scsi_register_interface(&ses_interface); | |
868 | if (err) | |
869 | return err; | |
870 | ||
871 | err = scsi_register_driver(&ses_template.gendrv); | |
872 | if (err) | |
873 | goto out_unreg; | |
874 | ||
875 | return 0; | |
876 | ||
877 | out_unreg: | |
878 | scsi_unregister_interface(&ses_interface); | |
879 | return err; | |
880 | } | |
881 | ||
882 | static void __exit ses_exit(void) | |
883 | { | |
884 | scsi_unregister_driver(&ses_template.gendrv); | |
885 | scsi_unregister_interface(&ses_interface); | |
886 | } | |
887 | ||
888 | module_init(ses_init); | |
889 | module_exit(ses_exit); | |
890 | ||
891 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE); | |
892 | ||
893 | MODULE_AUTHOR("James Bottomley"); | |
894 | MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver"); | |
895 | MODULE_LICENSE("GPL v2"); |