Commit | Line | Data |
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82c29810 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
9927c688 JB |
2 | /* |
3 | * SCSI Enclosure Services | |
4 | * | |
5 | * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com> | |
6 | * | |
7 | **----------------------------------------------------------------------------- | |
8 | ** | |
9927c688 JB |
9 | ** |
10 | **----------------------------------------------------------------------------- | |
11 | */ | |
12 | ||
5a0e3ad6 | 13 | #include <linux/slab.h> |
9927c688 JB |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/enclosure.h> | |
c38c007a | 17 | #include <asm/unaligned.h> |
9927c688 JB |
18 | |
19 | #include <scsi/scsi.h> | |
20 | #include <scsi/scsi_cmnd.h> | |
21 | #include <scsi/scsi_dbg.h> | |
22 | #include <scsi/scsi_device.h> | |
23 | #include <scsi/scsi_driver.h> | |
24 | #include <scsi/scsi_host.h> | |
25 | ||
3f8d6f2a JB |
26 | #include <scsi/scsi_transport_sas.h> |
27 | ||
9927c688 | 28 | struct ses_device { |
691b4773 | 29 | unsigned char *page1; |
8c3adc79 | 30 | unsigned char *page1_types; |
691b4773 YL |
31 | unsigned char *page2; |
32 | unsigned char *page10; | |
9927c688 | 33 | short page1_len; |
8c3adc79 | 34 | short page1_num_types; |
9927c688 JB |
35 | short page2_len; |
36 | short page10_len; | |
37 | }; | |
38 | ||
39 | struct ses_component { | |
40 | u64 addr; | |
9927c688 JB |
41 | }; |
42 | ||
dc56ce12 HR |
43 | static bool ses_page2_supported(struct enclosure_device *edev) |
44 | { | |
45 | struct ses_device *ses_dev = edev->scratch; | |
46 | ||
47 | return (ses_dev->page2 != NULL); | |
48 | } | |
49 | ||
9927c688 JB |
50 | static int ses_probe(struct device *dev) |
51 | { | |
52 | struct scsi_device *sdev = to_scsi_device(dev); | |
53 | int err = -ENODEV; | |
54 | ||
55 | if (sdev->type != TYPE_ENCLOSURE) | |
56 | goto out; | |
57 | ||
58 | err = 0; | |
59 | sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n"); | |
60 | ||
61 | out: | |
62 | return err; | |
63 | } | |
64 | ||
c95e62ce | 65 | #define SES_TIMEOUT (30 * HZ) |
9927c688 JB |
66 | #define SES_RETRIES 3 |
67 | ||
08024885 SL |
68 | static void init_device_slot_control(unsigned char *dest_desc, |
69 | struct enclosure_component *ecomp, | |
70 | unsigned char *status) | |
71 | { | |
72 | memcpy(dest_desc, status, 4); | |
73 | dest_desc[0] = 0; | |
74 | /* only clear byte 1 for ENCLOSURE_COMPONENT_DEVICE */ | |
75 | if (ecomp->type == ENCLOSURE_COMPONENT_DEVICE) | |
76 | dest_desc[1] = 0; | |
77 | dest_desc[2] &= 0xde; | |
78 | dest_desc[3] &= 0x3c; | |
79 | } | |
80 | ||
81 | ||
9927c688 JB |
82 | static int ses_recv_diag(struct scsi_device *sdev, int page_code, |
83 | void *buf, int bufflen) | |
84 | { | |
3417c1b5 | 85 | int ret; |
691b4773 | 86 | unsigned char cmd[] = { |
9927c688 JB |
87 | RECEIVE_DIAGNOSTIC, |
88 | 1, /* Set PCV bit */ | |
89 | page_code, | |
90 | bufflen >> 8, | |
91 | bufflen & 0xff, | |
92 | 0 | |
93 | }; | |
3417c1b5 | 94 | unsigned char recv_page_code; |
9927c688 | 95 | |
3417c1b5 | 96 | ret = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, bufflen, |
f4f4e47e | 97 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
424f727b | 98 | if (unlikely(ret)) |
3417c1b5 JB |
99 | return ret; |
100 | ||
101 | recv_page_code = ((unsigned char *)buf)[0]; | |
102 | ||
103 | if (likely(recv_page_code == page_code)) | |
104 | return ret; | |
105 | ||
106 | /* successful diagnostic but wrong page code. This happens to some | |
107 | * USB devices, just print a message and pretend there was an error */ | |
108 | ||
109 | sdev_printk(KERN_ERR, sdev, | |
110 | "Wrong diagnostic page; asked for %d got %u\n", | |
111 | page_code, recv_page_code); | |
112 | ||
113 | return -EINVAL; | |
9927c688 JB |
114 | } |
115 | ||
116 | static int ses_send_diag(struct scsi_device *sdev, int page_code, | |
117 | void *buf, int bufflen) | |
118 | { | |
119 | u32 result; | |
120 | ||
691b4773 | 121 | unsigned char cmd[] = { |
9927c688 JB |
122 | SEND_DIAGNOSTIC, |
123 | 0x10, /* Set PF bit */ | |
124 | 0, | |
125 | bufflen >> 8, | |
126 | bufflen & 0xff, | |
127 | 0 | |
128 | }; | |
129 | ||
130 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, buf, bufflen, | |
f4f4e47e | 131 | NULL, SES_TIMEOUT, SES_RETRIES, NULL); |
9927c688 JB |
132 | if (result) |
133 | sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n", | |
134 | result); | |
135 | return result; | |
136 | } | |
137 | ||
138 | static int ses_set_page2_descriptor(struct enclosure_device *edev, | |
139 | struct enclosure_component *ecomp, | |
691b4773 | 140 | unsigned char *desc) |
9927c688 JB |
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 | /* Clear everything */ | |
149 | memset(desc_ptr, 0, ses_dev->page2_len - 8); | |
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 | memcpy(desc_ptr, desc, 4); | |
158 | /* set select */ | |
159 | desc_ptr[0] |= 0x80; | |
160 | /* clear reserved, just in case */ | |
161 | desc_ptr[0] &= 0xf0; | |
162 | } | |
163 | } | |
164 | } | |
165 | ||
166 | return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); | |
167 | } | |
168 | ||
691b4773 | 169 | static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev, |
9927c688 JB |
170 | struct enclosure_component *ecomp) |
171 | { | |
172 | int i, j, count = 0, descriptor = ecomp->number; | |
ee959b00 | 173 | struct scsi_device *sdev = to_scsi_device(edev->edev.parent); |
9927c688 | 174 | struct ses_device *ses_dev = edev->scratch; |
8c3adc79 | 175 | unsigned char *type_ptr = ses_dev->page1_types; |
691b4773 | 176 | unsigned char *desc_ptr = ses_dev->page2 + 8; |
9927c688 | 177 | |
acf8ab9a HR |
178 | if (ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len) < 0) |
179 | return NULL; | |
9927c688 | 180 | |
8c3adc79 | 181 | for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { |
9927c688 JB |
182 | for (j = 0; j < type_ptr[1]; j++) { |
183 | desc_ptr += 4; | |
184 | if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && | |
185 | type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
186 | continue; | |
187 | if (count++ == descriptor) | |
188 | return desc_ptr; | |
189 | } | |
190 | } | |
191 | return NULL; | |
192 | } | |
193 | ||
2a350cab DG |
194 | /* For device slot and array device slot elements, byte 3 bit 6 |
195 | * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this | |
196 | * code stands these bits are shifted 4 positions right so in | |
197 | * sysfs they will appear as bits 2 and 1 respectively. Strange. */ | |
9927c688 JB |
198 | static void ses_get_fault(struct enclosure_device *edev, |
199 | struct enclosure_component *ecomp) | |
200 | { | |
691b4773 | 201 | unsigned char *desc; |
9927c688 | 202 | |
dc56ce12 HR |
203 | if (!ses_page2_supported(edev)) { |
204 | ecomp->fault = 0; | |
205 | return; | |
206 | } | |
9927c688 | 207 | desc = ses_get_page2_descriptor(edev, ecomp); |
691b4773 YL |
208 | if (desc) |
209 | ecomp->fault = (desc[3] & 0x60) >> 4; | |
9927c688 JB |
210 | } |
211 | ||
212 | static int ses_set_fault(struct enclosure_device *edev, | |
213 | struct enclosure_component *ecomp, | |
214 | enum enclosure_component_setting val) | |
215 | { | |
08024885 SL |
216 | unsigned char desc[4]; |
217 | unsigned char *desc_ptr; | |
218 | ||
dc56ce12 HR |
219 | if (!ses_page2_supported(edev)) |
220 | return -EINVAL; | |
221 | ||
08024885 SL |
222 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); |
223 | ||
224 | if (!desc_ptr) | |
225 | return -EIO; | |
226 | ||
227 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
228 | |
229 | switch (val) { | |
230 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 231 | desc[3] &= 0xdf; |
9927c688 JB |
232 | break; |
233 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 234 | desc[3] |= 0x20; |
9927c688 JB |
235 | break; |
236 | default: | |
237 | /* SES doesn't do the SGPIO blink settings */ | |
238 | return -EINVAL; | |
239 | } | |
240 | ||
241 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
242 | } | |
243 | ||
244 | static void ses_get_status(struct enclosure_device *edev, | |
245 | struct enclosure_component *ecomp) | |
246 | { | |
691b4773 | 247 | unsigned char *desc; |
9927c688 | 248 | |
dc56ce12 HR |
249 | if (!ses_page2_supported(edev)) { |
250 | ecomp->status = 0; | |
251 | return; | |
252 | } | |
9927c688 | 253 | desc = ses_get_page2_descriptor(edev, ecomp); |
691b4773 YL |
254 | if (desc) |
255 | ecomp->status = (desc[0] & 0x0f); | |
9927c688 JB |
256 | } |
257 | ||
258 | static void ses_get_locate(struct enclosure_device *edev, | |
259 | struct enclosure_component *ecomp) | |
260 | { | |
691b4773 | 261 | unsigned char *desc; |
9927c688 | 262 | |
dc56ce12 HR |
263 | if (!ses_page2_supported(edev)) { |
264 | ecomp->locate = 0; | |
265 | return; | |
266 | } | |
9927c688 | 267 | desc = ses_get_page2_descriptor(edev, ecomp); |
691b4773 YL |
268 | if (desc) |
269 | ecomp->locate = (desc[2] & 0x02) ? 1 : 0; | |
9927c688 JB |
270 | } |
271 | ||
272 | static int ses_set_locate(struct enclosure_device *edev, | |
273 | struct enclosure_component *ecomp, | |
274 | enum enclosure_component_setting val) | |
275 | { | |
08024885 SL |
276 | unsigned char desc[4]; |
277 | unsigned char *desc_ptr; | |
278 | ||
dc56ce12 HR |
279 | if (!ses_page2_supported(edev)) |
280 | return -EINVAL; | |
281 | ||
08024885 SL |
282 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); |
283 | ||
284 | if (!desc_ptr) | |
285 | return -EIO; | |
286 | ||
287 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
288 | |
289 | switch (val) { | |
290 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 291 | desc[2] &= 0xfd; |
9927c688 JB |
292 | break; |
293 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 294 | desc[2] |= 0x02; |
9927c688 JB |
295 | break; |
296 | default: | |
297 | /* SES doesn't do the SGPIO blink settings */ | |
298 | return -EINVAL; | |
299 | } | |
300 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
301 | } | |
302 | ||
303 | static int ses_set_active(struct enclosure_device *edev, | |
304 | struct enclosure_component *ecomp, | |
305 | enum enclosure_component_setting val) | |
306 | { | |
08024885 SL |
307 | unsigned char desc[4]; |
308 | unsigned char *desc_ptr; | |
309 | ||
dc56ce12 HR |
310 | if (!ses_page2_supported(edev)) |
311 | return -EINVAL; | |
312 | ||
08024885 SL |
313 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); |
314 | ||
315 | if (!desc_ptr) | |
316 | return -EIO; | |
317 | ||
318 | init_device_slot_control(desc, ecomp, desc_ptr); | |
9927c688 JB |
319 | |
320 | switch (val) { | |
321 | case ENCLOSURE_SETTING_DISABLED: | |
08024885 | 322 | desc[2] &= 0x7f; |
9927c688 JB |
323 | ecomp->active = 0; |
324 | break; | |
325 | case ENCLOSURE_SETTING_ENABLED: | |
08024885 | 326 | desc[2] |= 0x80; |
9927c688 JB |
327 | ecomp->active = 1; |
328 | break; | |
329 | default: | |
330 | /* SES doesn't do the SGPIO blink settings */ | |
331 | return -EINVAL; | |
332 | } | |
333 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
334 | } | |
335 | ||
967f7bab DW |
336 | static int ses_show_id(struct enclosure_device *edev, char *buf) |
337 | { | |
338 | struct ses_device *ses_dev = edev->scratch; | |
339 | unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4); | |
340 | ||
341 | return sprintf(buf, "%#llx\n", id); | |
342 | } | |
343 | ||
08024885 SL |
344 | static void ses_get_power_status(struct enclosure_device *edev, |
345 | struct enclosure_component *ecomp) | |
346 | { | |
347 | unsigned char *desc; | |
348 | ||
dc56ce12 HR |
349 | if (!ses_page2_supported(edev)) { |
350 | ecomp->power_status = 0; | |
351 | return; | |
352 | } | |
353 | ||
08024885 SL |
354 | desc = ses_get_page2_descriptor(edev, ecomp); |
355 | if (desc) | |
356 | ecomp->power_status = (desc[3] & 0x10) ? 0 : 1; | |
357 | } | |
358 | ||
359 | static int ses_set_power_status(struct enclosure_device *edev, | |
360 | struct enclosure_component *ecomp, | |
361 | int val) | |
362 | { | |
363 | unsigned char desc[4]; | |
364 | unsigned char *desc_ptr; | |
365 | ||
dc56ce12 HR |
366 | if (!ses_page2_supported(edev)) |
367 | return -EINVAL; | |
368 | ||
08024885 SL |
369 | desc_ptr = ses_get_page2_descriptor(edev, ecomp); |
370 | ||
371 | if (!desc_ptr) | |
372 | return -EIO; | |
373 | ||
374 | init_device_slot_control(desc, ecomp, desc_ptr); | |
375 | ||
376 | switch (val) { | |
377 | /* power = 1 is device_off = 0 and vice versa */ | |
378 | case 0: | |
379 | desc[3] |= 0x10; | |
380 | break; | |
381 | case 1: | |
382 | desc[3] &= 0xef; | |
383 | break; | |
384 | default: | |
385 | return -EINVAL; | |
386 | } | |
387 | ecomp->power_status = val; | |
388 | return ses_set_page2_descriptor(edev, ecomp, desc); | |
389 | } | |
390 | ||
9927c688 JB |
391 | static struct enclosure_component_callbacks ses_enclosure_callbacks = { |
392 | .get_fault = ses_get_fault, | |
393 | .set_fault = ses_set_fault, | |
394 | .get_status = ses_get_status, | |
395 | .get_locate = ses_get_locate, | |
396 | .set_locate = ses_set_locate, | |
08024885 SL |
397 | .get_power_status = ses_get_power_status, |
398 | .set_power_status = ses_set_power_status, | |
9927c688 | 399 | .set_active = ses_set_active, |
967f7bab | 400 | .show_id = ses_show_id, |
9927c688 JB |
401 | }; |
402 | ||
403 | struct ses_host_edev { | |
404 | struct Scsi_Host *shost; | |
405 | struct enclosure_device *edev; | |
406 | }; | |
407 | ||
e0aae1a5 | 408 | #if 0 |
9927c688 JB |
409 | int ses_match_host(struct enclosure_device *edev, void *data) |
410 | { | |
411 | struct ses_host_edev *sed = data; | |
412 | struct scsi_device *sdev; | |
413 | ||
ee959b00 | 414 | if (!scsi_is_sdev_device(edev->edev.parent)) |
9927c688 JB |
415 | return 0; |
416 | ||
ee959b00 | 417 | sdev = to_scsi_device(edev->edev.parent); |
9927c688 JB |
418 | |
419 | if (sdev->host != sed->shost) | |
420 | return 0; | |
421 | ||
422 | sed->edev = edev; | |
423 | return 1; | |
424 | } | |
e0aae1a5 | 425 | #endif /* 0 */ |
9927c688 JB |
426 | |
427 | static void ses_process_descriptor(struct enclosure_component *ecomp, | |
428 | unsigned char *desc) | |
429 | { | |
430 | int eip = desc[0] & 0x10; | |
431 | int invalid = desc[0] & 0x80; | |
432 | enum scsi_protocol proto = desc[0] & 0x0f; | |
433 | u64 addr = 0; | |
921ce7f5 | 434 | int slot = -1; |
9927c688 JB |
435 | struct ses_component *scomp = ecomp->scratch; |
436 | unsigned char *d; | |
437 | ||
9927c688 JB |
438 | if (invalid) |
439 | return; | |
440 | ||
441 | switch (proto) { | |
921ce7f5 DW |
442 | case SCSI_PROTOCOL_FCP: |
443 | if (eip) { | |
444 | d = desc + 4; | |
445 | slot = d[3]; | |
446 | } | |
447 | break; | |
9927c688 | 448 | case SCSI_PROTOCOL_SAS: |
921ce7f5 DW |
449 | if (eip) { |
450 | d = desc + 4; | |
451 | slot = d[3]; | |
9927c688 | 452 | d = desc + 8; |
921ce7f5 | 453 | } else |
9927c688 JB |
454 | d = desc + 4; |
455 | /* only take the phy0 addr */ | |
456 | addr = (u64)d[12] << 56 | | |
457 | (u64)d[13] << 48 | | |
458 | (u64)d[14] << 40 | | |
459 | (u64)d[15] << 32 | | |
460 | (u64)d[16] << 24 | | |
461 | (u64)d[17] << 16 | | |
462 | (u64)d[18] << 8 | | |
463 | (u64)d[19]; | |
464 | break; | |
465 | default: | |
466 | /* FIXME: Need to add more protocols than just SAS */ | |
467 | break; | |
468 | } | |
921ce7f5 | 469 | ecomp->slot = slot; |
9927c688 JB |
470 | scomp->addr = addr; |
471 | } | |
472 | ||
473 | struct efd { | |
474 | u64 addr; | |
475 | struct device *dev; | |
476 | }; | |
477 | ||
478 | static int ses_enclosure_find_by_addr(struct enclosure_device *edev, | |
479 | void *data) | |
480 | { | |
481 | struct efd *efd = data; | |
482 | int i; | |
483 | struct ses_component *scomp; | |
484 | ||
485 | if (!edev->component[0].scratch) | |
486 | return 0; | |
487 | ||
488 | for (i = 0; i < edev->components; i++) { | |
489 | scomp = edev->component[i].scratch; | |
490 | if (scomp->addr != efd->addr) | |
491 | continue; | |
492 | ||
15a0fbbc DW |
493 | if (enclosure_add_device(edev, i, efd->dev) == 0) |
494 | kobject_uevent(&efd->dev->kobj, KOBJ_CHANGE); | |
9927c688 JB |
495 | return 1; |
496 | } | |
497 | return 0; | |
498 | } | |
499 | ||
21fab1d0 JB |
500 | #define INIT_ALLOC_SIZE 32 |
501 | ||
502 | static void ses_enclosure_data_process(struct enclosure_device *edev, | |
503 | struct scsi_device *sdev, | |
504 | int create) | |
505 | { | |
506 | u32 result; | |
507 | unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL; | |
508 | int i, j, page7_len, len, components; | |
509 | struct ses_device *ses_dev = edev->scratch; | |
8c3adc79 | 510 | int types = ses_dev->page1_num_types; |
21fab1d0 JB |
511 | unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); |
512 | ||
513 | if (!hdr_buf) | |
514 | goto simple_populate; | |
515 | ||
516 | /* re-read page 10 */ | |
517 | if (ses_dev->page10) | |
518 | ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len); | |
519 | /* Page 7 for the descriptors is optional */ | |
520 | result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE); | |
521 | if (result) | |
522 | goto simple_populate; | |
523 | ||
524 | page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
525 | /* add 1 for trailing '\0' we'll use */ | |
526 | buf = kzalloc(len + 1, GFP_KERNEL); | |
527 | if (!buf) | |
528 | goto simple_populate; | |
529 | result = ses_recv_diag(sdev, 7, buf, len); | |
530 | if (result) { | |
531 | simple_populate: | |
532 | kfree(buf); | |
533 | buf = NULL; | |
534 | desc_ptr = NULL; | |
535 | len = 0; | |
536 | page7_len = 0; | |
537 | } else { | |
538 | desc_ptr = buf + 8; | |
539 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
540 | /* skip past overall descriptor */ | |
541 | desc_ptr += len + 4; | |
21fab1d0 | 542 | } |
877a5597 JH |
543 | if (ses_dev->page10) |
544 | addl_desc_ptr = ses_dev->page10 + 8; | |
8c3adc79 | 545 | type_ptr = ses_dev->page1_types; |
21fab1d0 JB |
546 | components = 0; |
547 | for (i = 0; i < types; i++, type_ptr += 4) { | |
548 | for (j = 0; j < type_ptr[1]; j++) { | |
549 | char *name = NULL; | |
550 | struct enclosure_component *ecomp; | |
551 | ||
552 | if (desc_ptr) { | |
553 | if (desc_ptr >= buf + page7_len) { | |
554 | desc_ptr = NULL; | |
555 | } else { | |
556 | len = (desc_ptr[2] << 8) + desc_ptr[3]; | |
557 | desc_ptr += 4; | |
558 | /* Add trailing zero - pushes into | |
559 | * reserved space */ | |
560 | desc_ptr[len] = '\0'; | |
561 | name = desc_ptr; | |
562 | } | |
563 | } | |
564 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
565 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) { | |
566 | ||
567 | if (create) | |
ed09dcc8 DW |
568 | ecomp = enclosure_component_alloc( |
569 | edev, | |
570 | components++, | |
571 | type_ptr[0], | |
572 | name); | |
21fab1d0 JB |
573 | else |
574 | ecomp = &edev->component[components++]; | |
575 | ||
ed09dcc8 DW |
576 | if (!IS_ERR(ecomp)) { |
577 | if (addl_desc_ptr) | |
578 | ses_process_descriptor( | |
579 | ecomp, | |
580 | addl_desc_ptr); | |
581 | if (create) | |
582 | enclosure_component_register( | |
583 | ecomp); | |
584 | } | |
21fab1d0 JB |
585 | } |
586 | if (desc_ptr) | |
587 | desc_ptr += len; | |
588 | ||
5e103356 JB |
589 | if (addl_desc_ptr && |
590 | /* only find additional descriptions for specific devices */ | |
591 | (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || | |
592 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE || | |
593 | type_ptr[0] == ENCLOSURE_COMPONENT_SAS_EXPANDER || | |
594 | /* these elements are optional */ | |
595 | type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_TARGET_PORT || | |
596 | type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_INITIATOR_PORT || | |
597 | type_ptr[0] == ENCLOSURE_COMPONENT_CONTROLLER_ELECTRONICS)) | |
21fab1d0 JB |
598 | addl_desc_ptr += addl_desc_ptr[1] + 2; |
599 | ||
600 | } | |
601 | } | |
602 | kfree(buf); | |
603 | kfree(hdr_buf); | |
604 | } | |
605 | ||
9927c688 | 606 | static void ses_match_to_enclosure(struct enclosure_device *edev, |
9c0a5002 LD |
607 | struct scsi_device *sdev, |
608 | int refresh) | |
9927c688 | 609 | { |
9c0a5002 | 610 | struct scsi_device *edev_sdev = to_scsi_device(edev->edev.parent); |
9927c688 JB |
611 | struct efd efd = { |
612 | .addr = 0, | |
613 | }; | |
9927c688 | 614 | |
9c0a5002 LD |
615 | if (refresh) |
616 | ses_enclosure_data_process(edev, edev_sdev, 0); | |
21fab1d0 | 617 | |
9373eba6 | 618 | if (scsi_is_sas_rphy(sdev->sdev_target->dev.parent)) |
3f8d6f2a | 619 | efd.addr = sas_get_address(sdev); |
9927c688 | 620 | |
c38c007a HR |
621 | if (efd.addr) { |
622 | efd.dev = &sdev->sdev_gendev; | |
9927c688 | 623 | |
c38c007a HR |
624 | enclosure_for_each_device(ses_enclosure_find_by_addr, &efd); |
625 | } | |
9927c688 JB |
626 | } |
627 | ||
ee959b00 | 628 | static int ses_intf_add(struct device *cdev, |
9927c688 JB |
629 | struct class_interface *intf) |
630 | { | |
ee959b00 | 631 | struct scsi_device *sdev = to_scsi_device(cdev->parent); |
9927c688 | 632 | struct scsi_device *tmp_sdev; |
81b59d75 | 633 | unsigned char *buf = NULL, *hdr_buf, *type_ptr, page; |
9927c688 JB |
634 | struct ses_device *ses_dev; |
635 | u32 result; | |
21fab1d0 | 636 | int i, types, len, components = 0; |
9927c688 | 637 | int err = -ENOMEM; |
8c3adc79 | 638 | int num_enclosures; |
9927c688 | 639 | struct enclosure_device *edev; |
7c46c20a | 640 | struct ses_component *scomp = NULL; |
9927c688 JB |
641 | |
642 | if (!scsi_device_enclosure(sdev)) { | |
643 | /* not an enclosure, but might be in one */ | |
163f52b6 JB |
644 | struct enclosure_device *prev = NULL; |
645 | ||
646 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
9c0a5002 | 647 | ses_match_to_enclosure(edev, sdev, 1); |
163f52b6 | 648 | prev = edev; |
9927c688 JB |
649 | } |
650 | return -ENODEV; | |
651 | } | |
652 | ||
653 | /* TYPE_ENCLOSURE prints a message in probe */ | |
654 | if (sdev->type != TYPE_ENCLOSURE) | |
655 | sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n"); | |
656 | ||
657 | ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL); | |
658 | hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); | |
659 | if (!hdr_buf || !ses_dev) | |
660 | goto err_init_free; | |
661 | ||
81b59d75 HR |
662 | page = 1; |
663 | result = ses_recv_diag(sdev, page, hdr_buf, INIT_ALLOC_SIZE); | |
9927c688 JB |
664 | if (result) |
665 | goto recv_failed; | |
666 | ||
9927c688 JB |
667 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; |
668 | buf = kzalloc(len, GFP_KERNEL); | |
669 | if (!buf) | |
670 | goto err_free; | |
671 | ||
81b59d75 | 672 | result = ses_recv_diag(sdev, page, buf, len); |
9927c688 JB |
673 | if (result) |
674 | goto recv_failed; | |
675 | ||
8c3adc79 | 676 | types = 0; |
9927c688 | 677 | |
8c3adc79 JB |
678 | /* we always have one main enclosure and the rest are referred |
679 | * to as secondary subenclosures */ | |
680 | num_enclosures = buf[1] + 1; | |
9927c688 | 681 | |
8c3adc79 JB |
682 | /* begin at the enclosure descriptor */ |
683 | type_ptr = buf + 8; | |
684 | /* skip all the enclosure descriptors */ | |
685 | for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) { | |
686 | types += type_ptr[2]; | |
687 | type_ptr += type_ptr[3] + 4; | |
688 | } | |
689 | ||
690 | ses_dev->page1_types = type_ptr; | |
691 | ses_dev->page1_num_types = types; | |
692 | ||
693 | for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) { | |
9927c688 JB |
694 | if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || |
695 | type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) | |
696 | components += type_ptr[1]; | |
697 | } | |
7c46c20a YL |
698 | ses_dev->page1 = buf; |
699 | ses_dev->page1_len = len; | |
700 | buf = NULL; | |
9927c688 | 701 | |
81b59d75 HR |
702 | page = 2; |
703 | result = ses_recv_diag(sdev, page, hdr_buf, INIT_ALLOC_SIZE); | |
9927c688 | 704 | if (result) |
dc56ce12 | 705 | goto page2_not_supported; |
9927c688 JB |
706 | |
707 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
708 | buf = kzalloc(len, GFP_KERNEL); | |
709 | if (!buf) | |
710 | goto err_free; | |
711 | ||
712 | /* make sure getting page 2 actually works */ | |
713 | result = ses_recv_diag(sdev, 2, buf, len); | |
714 | if (result) | |
715 | goto recv_failed; | |
716 | ses_dev->page2 = buf; | |
717 | ses_dev->page2_len = len; | |
7c46c20a | 718 | buf = NULL; |
9927c688 JB |
719 | |
720 | /* The additional information page --- allows us | |
721 | * to match up the devices */ | |
81b59d75 HR |
722 | page = 10; |
723 | result = ses_recv_diag(sdev, page, hdr_buf, INIT_ALLOC_SIZE); | |
691b4773 YL |
724 | if (!result) { |
725 | ||
726 | len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; | |
727 | buf = kzalloc(len, GFP_KERNEL); | |
728 | if (!buf) | |
729 | goto err_free; | |
730 | ||
81b59d75 | 731 | result = ses_recv_diag(sdev, page, buf, len); |
691b4773 YL |
732 | if (result) |
733 | goto recv_failed; | |
734 | ses_dev->page10 = buf; | |
735 | ses_dev->page10_len = len; | |
736 | buf = NULL; | |
737 | } | |
dc56ce12 | 738 | page2_not_supported: |
6396bb22 | 739 | scomp = kcalloc(components, sizeof(struct ses_component), GFP_KERNEL); |
9927c688 | 740 | if (!scomp) |
7c46c20a | 741 | goto err_free; |
9927c688 | 742 | |
71610f55 | 743 | edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev), |
9927c688 JB |
744 | components, &ses_enclosure_callbacks); |
745 | if (IS_ERR(edev)) { | |
746 | err = PTR_ERR(edev); | |
747 | goto err_free; | |
748 | } | |
749 | ||
9b3a6549 JL |
750 | kfree(hdr_buf); |
751 | ||
9927c688 JB |
752 | edev->scratch = ses_dev; |
753 | for (i = 0; i < components; i++) | |
7c46c20a | 754 | edev->component[i].scratch = scomp + i; |
9927c688 | 755 | |
21fab1d0 | 756 | ses_enclosure_data_process(edev, sdev, 1); |
9927c688 JB |
757 | |
758 | /* see if there are any devices matching before | |
759 | * we found the enclosure */ | |
760 | shost_for_each_device(tmp_sdev, sdev->host) { | |
761 | if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) | |
762 | continue; | |
9c0a5002 | 763 | ses_match_to_enclosure(edev, tmp_sdev, 0); |
9927c688 JB |
764 | } |
765 | ||
766 | return 0; | |
767 | ||
768 | recv_failed: | |
769 | sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n", | |
81b59d75 | 770 | page); |
9927c688 JB |
771 | err = -ENODEV; |
772 | err_free: | |
773 | kfree(buf); | |
7c46c20a | 774 | kfree(scomp); |
9927c688 JB |
775 | kfree(ses_dev->page10); |
776 | kfree(ses_dev->page2); | |
777 | kfree(ses_dev->page1); | |
778 | err_init_free: | |
779 | kfree(ses_dev); | |
780 | kfree(hdr_buf); | |
781 | sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err); | |
782 | return err; | |
783 | } | |
784 | ||
785 | static int ses_remove(struct device *dev) | |
786 | { | |
787 | return 0; | |
788 | } | |
789 | ||
43d8eb9c JB |
790 | static void ses_intf_remove_component(struct scsi_device *sdev) |
791 | { | |
792 | struct enclosure_device *edev, *prev = NULL; | |
793 | ||
794 | while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { | |
795 | prev = edev; | |
796 | if (!enclosure_remove_device(edev, &sdev->sdev_gendev)) | |
797 | break; | |
798 | } | |
799 | if (edev) | |
800 | put_device(&edev->edev); | |
801 | } | |
802 | ||
803 | static void ses_intf_remove_enclosure(struct scsi_device *sdev) | |
9927c688 | 804 | { |
9927c688 JB |
805 | struct enclosure_device *edev; |
806 | struct ses_device *ses_dev; | |
807 | ||
163f52b6 | 808 | /* exact match to this enclosure */ |
43d8eb9c | 809 | edev = enclosure_find(&sdev->sdev_gendev, NULL); |
9927c688 JB |
810 | if (!edev) |
811 | return; | |
812 | ||
813 | ses_dev = edev->scratch; | |
814 | edev->scratch = NULL; | |
815 | ||
7c46c20a | 816 | kfree(ses_dev->page10); |
9927c688 JB |
817 | kfree(ses_dev->page1); |
818 | kfree(ses_dev->page2); | |
819 | kfree(ses_dev); | |
820 | ||
821 | kfree(edev->component[0].scratch); | |
822 | ||
ee959b00 | 823 | put_device(&edev->edev); |
a5a039b0 | 824 | enclosure_unregister(edev); |
9927c688 JB |
825 | } |
826 | ||
43d8eb9c JB |
827 | static void ses_intf_remove(struct device *cdev, |
828 | struct class_interface *intf) | |
829 | { | |
830 | struct scsi_device *sdev = to_scsi_device(cdev->parent); | |
831 | ||
832 | if (!scsi_device_enclosure(sdev)) | |
833 | ses_intf_remove_component(sdev); | |
834 | else | |
835 | ses_intf_remove_enclosure(sdev); | |
836 | } | |
837 | ||
9927c688 | 838 | static struct class_interface ses_interface = { |
ee959b00 TJ |
839 | .add_dev = ses_intf_add, |
840 | .remove_dev = ses_intf_remove, | |
9927c688 JB |
841 | }; |
842 | ||
843 | static struct scsi_driver ses_template = { | |
9927c688 JB |
844 | .gendrv = { |
845 | .name = "ses", | |
3af6b352 | 846 | .owner = THIS_MODULE, |
9927c688 JB |
847 | .probe = ses_probe, |
848 | .remove = ses_remove, | |
849 | }, | |
850 | }; | |
851 | ||
852 | static int __init ses_init(void) | |
853 | { | |
854 | int err; | |
855 | ||
856 | err = scsi_register_interface(&ses_interface); | |
857 | if (err) | |
858 | return err; | |
859 | ||
860 | err = scsi_register_driver(&ses_template.gendrv); | |
861 | if (err) | |
862 | goto out_unreg; | |
863 | ||
864 | return 0; | |
865 | ||
866 | out_unreg: | |
867 | scsi_unregister_interface(&ses_interface); | |
868 | return err; | |
869 | } | |
870 | ||
871 | static void __exit ses_exit(void) | |
872 | { | |
873 | scsi_unregister_driver(&ses_template.gendrv); | |
874 | scsi_unregister_interface(&ses_interface); | |
875 | } | |
876 | ||
877 | module_init(ses_init); | |
878 | module_exit(ses_exit); | |
879 | ||
880 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE); | |
881 | ||
882 | MODULE_AUTHOR("James Bottomley"); | |
883 | MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver"); | |
884 | MODULE_LICENSE("GPL v2"); |