This source file includes following definitions.
- endo_id_show
- ap_intf_id_show
- intf_eject_store
- watchdog_show
- watchdog_store
- watchdog_action_show
- watchdog_action_store
- gb_svc_pwrmon_rail_count_get
- gb_svc_pwrmon_rail_names_get
- gb_svc_pwrmon_sample_get
- gb_svc_pwrmon_intf_sample_get
- gb_svc_intf_device_id
- gb_svc_intf_eject
- gb_svc_intf_vsys_set
- gb_svc_intf_refclk_set
- gb_svc_intf_unipro_set
- gb_svc_intf_activate
- gb_svc_intf_resume
- gb_svc_dme_peer_get
- gb_svc_dme_peer_set
- gb_svc_connection_create
- gb_svc_connection_destroy
- gb_svc_route_create
- gb_svc_route_destroy
- gb_svc_intf_set_power_mode
- gb_svc_intf_set_power_mode_hibernate
- gb_svc_ping
- gb_svc_version_request
- pwr_debugfs_voltage_read
- pwr_debugfs_current_read
- pwr_debugfs_power_read
- gb_svc_pwrmon_debugfs_init
- gb_svc_debugfs_init
- gb_svc_debugfs_exit
- gb_svc_hello
- gb_svc_interface_lookup
- gb_svc_module_lookup
- gb_svc_process_hello_deferred
- gb_svc_process_module_inserted
- gb_svc_process_module_removed
- gb_svc_process_intf_oops
- gb_svc_process_intf_mailbox_event
- gb_svc_process_deferred_request
- gb_svc_queue_deferred_request
- gb_svc_intf_reset_recv
- gb_svc_module_inserted_recv
- gb_svc_module_removed_recv
- gb_svc_intf_oops_recv
- gb_svc_intf_mailbox_event_recv
- gb_svc_request_handler
- gb_svc_release
- gb_svc_create
- gb_svc_add
- gb_svc_remove_modules
- gb_svc_del
- gb_svc_put
1
2
3
4
5
6
7
8
9 #include <linux/debugfs.h>
10 #include <linux/workqueue.h>
11 #include <linux/greybus.h>
12
13 #define SVC_INTF_EJECT_TIMEOUT 9000
14 #define SVC_INTF_ACTIVATE_TIMEOUT 6000
15 #define SVC_INTF_RESUME_TIMEOUT 3000
16
17 struct gb_svc_deferred_request {
18 struct work_struct work;
19 struct gb_operation *operation;
20 };
21
22 static int gb_svc_queue_deferred_request(struct gb_operation *operation);
23
24 static ssize_t endo_id_show(struct device *dev,
25 struct device_attribute *attr, char *buf)
26 {
27 struct gb_svc *svc = to_gb_svc(dev);
28
29 return sprintf(buf, "0x%04x\n", svc->endo_id);
30 }
31 static DEVICE_ATTR_RO(endo_id);
32
33 static ssize_t ap_intf_id_show(struct device *dev,
34 struct device_attribute *attr, char *buf)
35 {
36 struct gb_svc *svc = to_gb_svc(dev);
37
38 return sprintf(buf, "%u\n", svc->ap_intf_id);
39 }
40 static DEVICE_ATTR_RO(ap_intf_id);
41
42
43
44
45
46
47 static ssize_t intf_eject_store(struct device *dev,
48 struct device_attribute *attr, const char *buf,
49 size_t len)
50 {
51 struct gb_svc *svc = to_gb_svc(dev);
52 unsigned short intf_id;
53 int ret;
54
55 ret = kstrtou16(buf, 10, &intf_id);
56 if (ret < 0)
57 return ret;
58
59 dev_warn(dev, "Forcibly trying to eject interface %d\n", intf_id);
60
61 ret = gb_svc_intf_eject(svc, intf_id);
62 if (ret < 0)
63 return ret;
64
65 return len;
66 }
67 static DEVICE_ATTR_WO(intf_eject);
68
69 static ssize_t watchdog_show(struct device *dev, struct device_attribute *attr,
70 char *buf)
71 {
72 struct gb_svc *svc = to_gb_svc(dev);
73
74 return sprintf(buf, "%s\n",
75 gb_svc_watchdog_enabled(svc) ? "enabled" : "disabled");
76 }
77
78 static ssize_t watchdog_store(struct device *dev,
79 struct device_attribute *attr, const char *buf,
80 size_t len)
81 {
82 struct gb_svc *svc = to_gb_svc(dev);
83 int retval;
84 bool user_request;
85
86 retval = strtobool(buf, &user_request);
87 if (retval)
88 return retval;
89
90 if (user_request)
91 retval = gb_svc_watchdog_enable(svc);
92 else
93 retval = gb_svc_watchdog_disable(svc);
94 if (retval)
95 return retval;
96 return len;
97 }
98 static DEVICE_ATTR_RW(watchdog);
99
100 static ssize_t watchdog_action_show(struct device *dev,
101 struct device_attribute *attr, char *buf)
102 {
103 struct gb_svc *svc = to_gb_svc(dev);
104
105 if (svc->action == GB_SVC_WATCHDOG_BITE_PANIC_KERNEL)
106 return sprintf(buf, "panic\n");
107 else if (svc->action == GB_SVC_WATCHDOG_BITE_RESET_UNIPRO)
108 return sprintf(buf, "reset\n");
109
110 return -EINVAL;
111 }
112
113 static ssize_t watchdog_action_store(struct device *dev,
114 struct device_attribute *attr,
115 const char *buf, size_t len)
116 {
117 struct gb_svc *svc = to_gb_svc(dev);
118
119 if (sysfs_streq(buf, "panic"))
120 svc->action = GB_SVC_WATCHDOG_BITE_PANIC_KERNEL;
121 else if (sysfs_streq(buf, "reset"))
122 svc->action = GB_SVC_WATCHDOG_BITE_RESET_UNIPRO;
123 else
124 return -EINVAL;
125
126 return len;
127 }
128 static DEVICE_ATTR_RW(watchdog_action);
129
130 static int gb_svc_pwrmon_rail_count_get(struct gb_svc *svc, u8 *value)
131 {
132 struct gb_svc_pwrmon_rail_count_get_response response;
133 int ret;
134
135 ret = gb_operation_sync(svc->connection,
136 GB_SVC_TYPE_PWRMON_RAIL_COUNT_GET, NULL, 0,
137 &response, sizeof(response));
138 if (ret) {
139 dev_err(&svc->dev, "failed to get rail count: %d\n", ret);
140 return ret;
141 }
142
143 *value = response.rail_count;
144
145 return 0;
146 }
147
148 static int gb_svc_pwrmon_rail_names_get(struct gb_svc *svc,
149 struct gb_svc_pwrmon_rail_names_get_response *response,
150 size_t bufsize)
151 {
152 int ret;
153
154 ret = gb_operation_sync(svc->connection,
155 GB_SVC_TYPE_PWRMON_RAIL_NAMES_GET, NULL, 0,
156 response, bufsize);
157 if (ret) {
158 dev_err(&svc->dev, "failed to get rail names: %d\n", ret);
159 return ret;
160 }
161
162 if (response->status != GB_SVC_OP_SUCCESS) {
163 dev_err(&svc->dev,
164 "SVC error while getting rail names: %u\n",
165 response->status);
166 return -EREMOTEIO;
167 }
168
169 return 0;
170 }
171
172 static int gb_svc_pwrmon_sample_get(struct gb_svc *svc, u8 rail_id,
173 u8 measurement_type, u32 *value)
174 {
175 struct gb_svc_pwrmon_sample_get_request request;
176 struct gb_svc_pwrmon_sample_get_response response;
177 int ret;
178
179 request.rail_id = rail_id;
180 request.measurement_type = measurement_type;
181
182 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_PWRMON_SAMPLE_GET,
183 &request, sizeof(request),
184 &response, sizeof(response));
185 if (ret) {
186 dev_err(&svc->dev, "failed to get rail sample: %d\n", ret);
187 return ret;
188 }
189
190 if (response.result) {
191 dev_err(&svc->dev,
192 "UniPro error while getting rail power sample (%d %d): %d\n",
193 rail_id, measurement_type, response.result);
194 switch (response.result) {
195 case GB_SVC_PWRMON_GET_SAMPLE_INVAL:
196 return -EINVAL;
197 case GB_SVC_PWRMON_GET_SAMPLE_NOSUPP:
198 return -ENOMSG;
199 default:
200 return -EREMOTEIO;
201 }
202 }
203
204 *value = le32_to_cpu(response.measurement);
205
206 return 0;
207 }
208
209 int gb_svc_pwrmon_intf_sample_get(struct gb_svc *svc, u8 intf_id,
210 u8 measurement_type, u32 *value)
211 {
212 struct gb_svc_pwrmon_intf_sample_get_request request;
213 struct gb_svc_pwrmon_intf_sample_get_response response;
214 int ret;
215
216 request.intf_id = intf_id;
217 request.measurement_type = measurement_type;
218
219 ret = gb_operation_sync(svc->connection,
220 GB_SVC_TYPE_PWRMON_INTF_SAMPLE_GET,
221 &request, sizeof(request),
222 &response, sizeof(response));
223 if (ret) {
224 dev_err(&svc->dev, "failed to get intf sample: %d\n", ret);
225 return ret;
226 }
227
228 if (response.result) {
229 dev_err(&svc->dev,
230 "UniPro error while getting intf power sample (%d %d): %d\n",
231 intf_id, measurement_type, response.result);
232 switch (response.result) {
233 case GB_SVC_PWRMON_GET_SAMPLE_INVAL:
234 return -EINVAL;
235 case GB_SVC_PWRMON_GET_SAMPLE_NOSUPP:
236 return -ENOMSG;
237 default:
238 return -EREMOTEIO;
239 }
240 }
241
242 *value = le32_to_cpu(response.measurement);
243
244 return 0;
245 }
246
247 static struct attribute *svc_attrs[] = {
248 &dev_attr_endo_id.attr,
249 &dev_attr_ap_intf_id.attr,
250 &dev_attr_intf_eject.attr,
251 &dev_attr_watchdog.attr,
252 &dev_attr_watchdog_action.attr,
253 NULL,
254 };
255 ATTRIBUTE_GROUPS(svc);
256
257 int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id)
258 {
259 struct gb_svc_intf_device_id_request request;
260
261 request.intf_id = intf_id;
262 request.device_id = device_id;
263
264 return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_DEVICE_ID,
265 &request, sizeof(request), NULL, 0);
266 }
267
268 int gb_svc_intf_eject(struct gb_svc *svc, u8 intf_id)
269 {
270 struct gb_svc_intf_eject_request request;
271 int ret;
272
273 request.intf_id = intf_id;
274
275
276
277
278
279 ret = gb_operation_sync_timeout(svc->connection,
280 GB_SVC_TYPE_INTF_EJECT, &request,
281 sizeof(request), NULL, 0,
282 SVC_INTF_EJECT_TIMEOUT);
283 if (ret) {
284 dev_err(&svc->dev, "failed to eject interface %u\n", intf_id);
285 return ret;
286 }
287
288 return 0;
289 }
290
291 int gb_svc_intf_vsys_set(struct gb_svc *svc, u8 intf_id, bool enable)
292 {
293 struct gb_svc_intf_vsys_request request;
294 struct gb_svc_intf_vsys_response response;
295 int type, ret;
296
297 request.intf_id = intf_id;
298
299 if (enable)
300 type = GB_SVC_TYPE_INTF_VSYS_ENABLE;
301 else
302 type = GB_SVC_TYPE_INTF_VSYS_DISABLE;
303
304 ret = gb_operation_sync(svc->connection, type,
305 &request, sizeof(request),
306 &response, sizeof(response));
307 if (ret < 0)
308 return ret;
309 if (response.result_code != GB_SVC_INTF_VSYS_OK)
310 return -EREMOTEIO;
311 return 0;
312 }
313
314 int gb_svc_intf_refclk_set(struct gb_svc *svc, u8 intf_id, bool enable)
315 {
316 struct gb_svc_intf_refclk_request request;
317 struct gb_svc_intf_refclk_response response;
318 int type, ret;
319
320 request.intf_id = intf_id;
321
322 if (enable)
323 type = GB_SVC_TYPE_INTF_REFCLK_ENABLE;
324 else
325 type = GB_SVC_TYPE_INTF_REFCLK_DISABLE;
326
327 ret = gb_operation_sync(svc->connection, type,
328 &request, sizeof(request),
329 &response, sizeof(response));
330 if (ret < 0)
331 return ret;
332 if (response.result_code != GB_SVC_INTF_REFCLK_OK)
333 return -EREMOTEIO;
334 return 0;
335 }
336
337 int gb_svc_intf_unipro_set(struct gb_svc *svc, u8 intf_id, bool enable)
338 {
339 struct gb_svc_intf_unipro_request request;
340 struct gb_svc_intf_unipro_response response;
341 int type, ret;
342
343 request.intf_id = intf_id;
344
345 if (enable)
346 type = GB_SVC_TYPE_INTF_UNIPRO_ENABLE;
347 else
348 type = GB_SVC_TYPE_INTF_UNIPRO_DISABLE;
349
350 ret = gb_operation_sync(svc->connection, type,
351 &request, sizeof(request),
352 &response, sizeof(response));
353 if (ret < 0)
354 return ret;
355 if (response.result_code != GB_SVC_INTF_UNIPRO_OK)
356 return -EREMOTEIO;
357 return 0;
358 }
359
360 int gb_svc_intf_activate(struct gb_svc *svc, u8 intf_id, u8 *intf_type)
361 {
362 struct gb_svc_intf_activate_request request;
363 struct gb_svc_intf_activate_response response;
364 int ret;
365
366 request.intf_id = intf_id;
367
368 ret = gb_operation_sync_timeout(svc->connection,
369 GB_SVC_TYPE_INTF_ACTIVATE,
370 &request, sizeof(request),
371 &response, sizeof(response),
372 SVC_INTF_ACTIVATE_TIMEOUT);
373 if (ret < 0)
374 return ret;
375 if (response.status != GB_SVC_OP_SUCCESS) {
376 dev_err(&svc->dev, "failed to activate interface %u: %u\n",
377 intf_id, response.status);
378 return -EREMOTEIO;
379 }
380
381 *intf_type = response.intf_type;
382
383 return 0;
384 }
385
386 int gb_svc_intf_resume(struct gb_svc *svc, u8 intf_id)
387 {
388 struct gb_svc_intf_resume_request request;
389 struct gb_svc_intf_resume_response response;
390 int ret;
391
392 request.intf_id = intf_id;
393
394 ret = gb_operation_sync_timeout(svc->connection,
395 GB_SVC_TYPE_INTF_RESUME,
396 &request, sizeof(request),
397 &response, sizeof(response),
398 SVC_INTF_RESUME_TIMEOUT);
399 if (ret < 0) {
400 dev_err(&svc->dev, "failed to send interface resume %u: %d\n",
401 intf_id, ret);
402 return ret;
403 }
404
405 if (response.status != GB_SVC_OP_SUCCESS) {
406 dev_err(&svc->dev, "failed to resume interface %u: %u\n",
407 intf_id, response.status);
408 return -EREMOTEIO;
409 }
410
411 return 0;
412 }
413
414 int gb_svc_dme_peer_get(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
415 u32 *value)
416 {
417 struct gb_svc_dme_peer_get_request request;
418 struct gb_svc_dme_peer_get_response response;
419 u16 result;
420 int ret;
421
422 request.intf_id = intf_id;
423 request.attr = cpu_to_le16(attr);
424 request.selector = cpu_to_le16(selector);
425
426 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_GET,
427 &request, sizeof(request),
428 &response, sizeof(response));
429 if (ret) {
430 dev_err(&svc->dev, "failed to get DME attribute (%u 0x%04x %u): %d\n",
431 intf_id, attr, selector, ret);
432 return ret;
433 }
434
435 result = le16_to_cpu(response.result_code);
436 if (result) {
437 dev_err(&svc->dev, "UniPro error while getting DME attribute (%u 0x%04x %u): %u\n",
438 intf_id, attr, selector, result);
439 return -EREMOTEIO;
440 }
441
442 if (value)
443 *value = le32_to_cpu(response.attr_value);
444
445 return 0;
446 }
447
448 int gb_svc_dme_peer_set(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
449 u32 value)
450 {
451 struct gb_svc_dme_peer_set_request request;
452 struct gb_svc_dme_peer_set_response response;
453 u16 result;
454 int ret;
455
456 request.intf_id = intf_id;
457 request.attr = cpu_to_le16(attr);
458 request.selector = cpu_to_le16(selector);
459 request.value = cpu_to_le32(value);
460
461 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_SET,
462 &request, sizeof(request),
463 &response, sizeof(response));
464 if (ret) {
465 dev_err(&svc->dev, "failed to set DME attribute (%u 0x%04x %u %u): %d\n",
466 intf_id, attr, selector, value, ret);
467 return ret;
468 }
469
470 result = le16_to_cpu(response.result_code);
471 if (result) {
472 dev_err(&svc->dev, "UniPro error while setting DME attribute (%u 0x%04x %u %u): %u\n",
473 intf_id, attr, selector, value, result);
474 return -EREMOTEIO;
475 }
476
477 return 0;
478 }
479
480 int gb_svc_connection_create(struct gb_svc *svc,
481 u8 intf1_id, u16 cport1_id,
482 u8 intf2_id, u16 cport2_id,
483 u8 cport_flags)
484 {
485 struct gb_svc_conn_create_request request;
486
487 request.intf1_id = intf1_id;
488 request.cport1_id = cpu_to_le16(cport1_id);
489 request.intf2_id = intf2_id;
490 request.cport2_id = cpu_to_le16(cport2_id);
491 request.tc = 0;
492 request.flags = cport_flags;
493
494 return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_CREATE,
495 &request, sizeof(request), NULL, 0);
496 }
497
498 void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
499 u8 intf2_id, u16 cport2_id)
500 {
501 struct gb_svc_conn_destroy_request request;
502 struct gb_connection *connection = svc->connection;
503 int ret;
504
505 request.intf1_id = intf1_id;
506 request.cport1_id = cpu_to_le16(cport1_id);
507 request.intf2_id = intf2_id;
508 request.cport2_id = cpu_to_le16(cport2_id);
509
510 ret = gb_operation_sync(connection, GB_SVC_TYPE_CONN_DESTROY,
511 &request, sizeof(request), NULL, 0);
512 if (ret) {
513 dev_err(&svc->dev, "failed to destroy connection (%u:%u %u:%u): %d\n",
514 intf1_id, cport1_id, intf2_id, cport2_id, ret);
515 }
516 }
517
518
519 int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id,
520 u8 intf2_id, u8 dev2_id)
521 {
522 struct gb_svc_route_create_request request;
523
524 request.intf1_id = intf1_id;
525 request.dev1_id = dev1_id;
526 request.intf2_id = intf2_id;
527 request.dev2_id = dev2_id;
528
529 return gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_CREATE,
530 &request, sizeof(request), NULL, 0);
531 }
532
533
534 void gb_svc_route_destroy(struct gb_svc *svc, u8 intf1_id, u8 intf2_id)
535 {
536 struct gb_svc_route_destroy_request request;
537 int ret;
538
539 request.intf1_id = intf1_id;
540 request.intf2_id = intf2_id;
541
542 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_DESTROY,
543 &request, sizeof(request), NULL, 0);
544 if (ret) {
545 dev_err(&svc->dev, "failed to destroy route (%u %u): %d\n",
546 intf1_id, intf2_id, ret);
547 }
548 }
549
550 int gb_svc_intf_set_power_mode(struct gb_svc *svc, u8 intf_id, u8 hs_series,
551 u8 tx_mode, u8 tx_gear, u8 tx_nlanes,
552 u8 tx_amplitude, u8 tx_hs_equalizer,
553 u8 rx_mode, u8 rx_gear, u8 rx_nlanes,
554 u8 flags, u32 quirks,
555 struct gb_svc_l2_timer_cfg *local,
556 struct gb_svc_l2_timer_cfg *remote)
557 {
558 struct gb_svc_intf_set_pwrm_request request;
559 struct gb_svc_intf_set_pwrm_response response;
560 int ret;
561 u16 result_code;
562
563 memset(&request, 0, sizeof(request));
564
565 request.intf_id = intf_id;
566 request.hs_series = hs_series;
567 request.tx_mode = tx_mode;
568 request.tx_gear = tx_gear;
569 request.tx_nlanes = tx_nlanes;
570 request.tx_amplitude = tx_amplitude;
571 request.tx_hs_equalizer = tx_hs_equalizer;
572 request.rx_mode = rx_mode;
573 request.rx_gear = rx_gear;
574 request.rx_nlanes = rx_nlanes;
575 request.flags = flags;
576 request.quirks = cpu_to_le32(quirks);
577 if (local)
578 request.local_l2timerdata = *local;
579 if (remote)
580 request.remote_l2timerdata = *remote;
581
582 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_SET_PWRM,
583 &request, sizeof(request),
584 &response, sizeof(response));
585 if (ret < 0)
586 return ret;
587
588 result_code = response.result_code;
589 if (result_code != GB_SVC_SETPWRM_PWR_LOCAL) {
590 dev_err(&svc->dev, "set power mode = %d\n", result_code);
591 return -EIO;
592 }
593
594 return 0;
595 }
596 EXPORT_SYMBOL_GPL(gb_svc_intf_set_power_mode);
597
598 int gb_svc_intf_set_power_mode_hibernate(struct gb_svc *svc, u8 intf_id)
599 {
600 struct gb_svc_intf_set_pwrm_request request;
601 struct gb_svc_intf_set_pwrm_response response;
602 int ret;
603 u16 result_code;
604
605 memset(&request, 0, sizeof(request));
606
607 request.intf_id = intf_id;
608 request.hs_series = GB_SVC_UNIPRO_HS_SERIES_A;
609 request.tx_mode = GB_SVC_UNIPRO_HIBERNATE_MODE;
610 request.rx_mode = GB_SVC_UNIPRO_HIBERNATE_MODE;
611
612 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_SET_PWRM,
613 &request, sizeof(request),
614 &response, sizeof(response));
615 if (ret < 0) {
616 dev_err(&svc->dev,
617 "failed to send set power mode operation to interface %u: %d\n",
618 intf_id, ret);
619 return ret;
620 }
621
622 result_code = response.result_code;
623 if (result_code != GB_SVC_SETPWRM_PWR_OK) {
624 dev_err(&svc->dev,
625 "failed to hibernate the link for interface %u: %u\n",
626 intf_id, result_code);
627 return -EIO;
628 }
629
630 return 0;
631 }
632
633 int gb_svc_ping(struct gb_svc *svc)
634 {
635 return gb_operation_sync_timeout(svc->connection, GB_SVC_TYPE_PING,
636 NULL, 0, NULL, 0,
637 GB_OPERATION_TIMEOUT_DEFAULT * 2);
638 }
639
640 static int gb_svc_version_request(struct gb_operation *op)
641 {
642 struct gb_connection *connection = op->connection;
643 struct gb_svc *svc = gb_connection_get_data(connection);
644 struct gb_svc_version_request *request;
645 struct gb_svc_version_response *response;
646
647 if (op->request->payload_size < sizeof(*request)) {
648 dev_err(&svc->dev, "short version request (%zu < %zu)\n",
649 op->request->payload_size,
650 sizeof(*request));
651 return -EINVAL;
652 }
653
654 request = op->request->payload;
655
656 if (request->major > GB_SVC_VERSION_MAJOR) {
657 dev_warn(&svc->dev, "unsupported major version (%u > %u)\n",
658 request->major, GB_SVC_VERSION_MAJOR);
659 return -ENOTSUPP;
660 }
661
662 svc->protocol_major = request->major;
663 svc->protocol_minor = request->minor;
664
665 if (!gb_operation_response_alloc(op, sizeof(*response), GFP_KERNEL))
666 return -ENOMEM;
667
668 response = op->response->payload;
669 response->major = svc->protocol_major;
670 response->minor = svc->protocol_minor;
671
672 return 0;
673 }
674
675 static ssize_t pwr_debugfs_voltage_read(struct file *file, char __user *buf,
676 size_t len, loff_t *offset)
677 {
678 struct svc_debugfs_pwrmon_rail *pwrmon_rails =
679 file_inode(file)->i_private;
680 struct gb_svc *svc = pwrmon_rails->svc;
681 int ret, desc;
682 u32 value;
683 char buff[16];
684
685 ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
686 GB_SVC_PWRMON_TYPE_VOL, &value);
687 if (ret) {
688 dev_err(&svc->dev,
689 "failed to get voltage sample %u: %d\n",
690 pwrmon_rails->id, ret);
691 return ret;
692 }
693
694 desc = scnprintf(buff, sizeof(buff), "%u\n", value);
695
696 return simple_read_from_buffer(buf, len, offset, buff, desc);
697 }
698
699 static ssize_t pwr_debugfs_current_read(struct file *file, char __user *buf,
700 size_t len, loff_t *offset)
701 {
702 struct svc_debugfs_pwrmon_rail *pwrmon_rails =
703 file_inode(file)->i_private;
704 struct gb_svc *svc = pwrmon_rails->svc;
705 int ret, desc;
706 u32 value;
707 char buff[16];
708
709 ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
710 GB_SVC_PWRMON_TYPE_CURR, &value);
711 if (ret) {
712 dev_err(&svc->dev,
713 "failed to get current sample %u: %d\n",
714 pwrmon_rails->id, ret);
715 return ret;
716 }
717
718 desc = scnprintf(buff, sizeof(buff), "%u\n", value);
719
720 return simple_read_from_buffer(buf, len, offset, buff, desc);
721 }
722
723 static ssize_t pwr_debugfs_power_read(struct file *file, char __user *buf,
724 size_t len, loff_t *offset)
725 {
726 struct svc_debugfs_pwrmon_rail *pwrmon_rails =
727 file_inode(file)->i_private;
728 struct gb_svc *svc = pwrmon_rails->svc;
729 int ret, desc;
730 u32 value;
731 char buff[16];
732
733 ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
734 GB_SVC_PWRMON_TYPE_PWR, &value);
735 if (ret) {
736 dev_err(&svc->dev, "failed to get power sample %u: %d\n",
737 pwrmon_rails->id, ret);
738 return ret;
739 }
740
741 desc = scnprintf(buff, sizeof(buff), "%u\n", value);
742
743 return simple_read_from_buffer(buf, len, offset, buff, desc);
744 }
745
746 static const struct file_operations pwrmon_debugfs_voltage_fops = {
747 .read = pwr_debugfs_voltage_read,
748 };
749
750 static const struct file_operations pwrmon_debugfs_current_fops = {
751 .read = pwr_debugfs_current_read,
752 };
753
754 static const struct file_operations pwrmon_debugfs_power_fops = {
755 .read = pwr_debugfs_power_read,
756 };
757
758 static void gb_svc_pwrmon_debugfs_init(struct gb_svc *svc)
759 {
760 int i;
761 size_t bufsize;
762 struct dentry *dent;
763 struct gb_svc_pwrmon_rail_names_get_response *rail_names;
764 u8 rail_count;
765
766 dent = debugfs_create_dir("pwrmon", svc->debugfs_dentry);
767 if (IS_ERR_OR_NULL(dent))
768 return;
769
770 if (gb_svc_pwrmon_rail_count_get(svc, &rail_count))
771 goto err_pwrmon_debugfs;
772
773 if (!rail_count || rail_count > GB_SVC_PWRMON_MAX_RAIL_COUNT)
774 goto err_pwrmon_debugfs;
775
776 bufsize = sizeof(*rail_names) +
777 GB_SVC_PWRMON_RAIL_NAME_BUFSIZE * rail_count;
778
779 rail_names = kzalloc(bufsize, GFP_KERNEL);
780 if (!rail_names)
781 goto err_pwrmon_debugfs;
782
783 svc->pwrmon_rails = kcalloc(rail_count, sizeof(*svc->pwrmon_rails),
784 GFP_KERNEL);
785 if (!svc->pwrmon_rails)
786 goto err_pwrmon_debugfs_free;
787
788 if (gb_svc_pwrmon_rail_names_get(svc, rail_names, bufsize))
789 goto err_pwrmon_debugfs_free;
790
791 for (i = 0; i < rail_count; i++) {
792 struct dentry *dir;
793 struct svc_debugfs_pwrmon_rail *rail = &svc->pwrmon_rails[i];
794 char fname[GB_SVC_PWRMON_RAIL_NAME_BUFSIZE];
795
796 snprintf(fname, sizeof(fname), "%s",
797 (char *)&rail_names->name[i]);
798
799 rail->id = i;
800 rail->svc = svc;
801
802 dir = debugfs_create_dir(fname, dent);
803 debugfs_create_file("voltage_now", 0444, dir, rail,
804 &pwrmon_debugfs_voltage_fops);
805 debugfs_create_file("current_now", 0444, dir, rail,
806 &pwrmon_debugfs_current_fops);
807 debugfs_create_file("power_now", 0444, dir, rail,
808 &pwrmon_debugfs_power_fops);
809 }
810
811 kfree(rail_names);
812 return;
813
814 err_pwrmon_debugfs_free:
815 kfree(rail_names);
816 kfree(svc->pwrmon_rails);
817 svc->pwrmon_rails = NULL;
818
819 err_pwrmon_debugfs:
820 debugfs_remove(dent);
821 }
822
823 static void gb_svc_debugfs_init(struct gb_svc *svc)
824 {
825 svc->debugfs_dentry = debugfs_create_dir(dev_name(&svc->dev),
826 gb_debugfs_get());
827 gb_svc_pwrmon_debugfs_init(svc);
828 }
829
830 static void gb_svc_debugfs_exit(struct gb_svc *svc)
831 {
832 debugfs_remove_recursive(svc->debugfs_dentry);
833 kfree(svc->pwrmon_rails);
834 svc->pwrmon_rails = NULL;
835 }
836
837 static int gb_svc_hello(struct gb_operation *op)
838 {
839 struct gb_connection *connection = op->connection;
840 struct gb_svc *svc = gb_connection_get_data(connection);
841 struct gb_svc_hello_request *hello_request;
842 int ret;
843
844 if (op->request->payload_size < sizeof(*hello_request)) {
845 dev_warn(&svc->dev, "short hello request (%zu < %zu)\n",
846 op->request->payload_size,
847 sizeof(*hello_request));
848 return -EINVAL;
849 }
850
851 hello_request = op->request->payload;
852 svc->endo_id = le16_to_cpu(hello_request->endo_id);
853 svc->ap_intf_id = hello_request->interface_id;
854
855 ret = device_add(&svc->dev);
856 if (ret) {
857 dev_err(&svc->dev, "failed to register svc device: %d\n", ret);
858 return ret;
859 }
860
861 ret = gb_svc_watchdog_create(svc);
862 if (ret) {
863 dev_err(&svc->dev, "failed to create watchdog: %d\n", ret);
864 goto err_unregister_device;
865 }
866
867 gb_svc_debugfs_init(svc);
868
869 return gb_svc_queue_deferred_request(op);
870
871 err_unregister_device:
872 gb_svc_watchdog_destroy(svc);
873 device_del(&svc->dev);
874 return ret;
875 }
876
877 static struct gb_interface *gb_svc_interface_lookup(struct gb_svc *svc,
878 u8 intf_id)
879 {
880 struct gb_host_device *hd = svc->hd;
881 struct gb_module *module;
882 size_t num_interfaces;
883 u8 module_id;
884
885 list_for_each_entry(module, &hd->modules, hd_node) {
886 module_id = module->module_id;
887 num_interfaces = module->num_interfaces;
888
889 if (intf_id >= module_id &&
890 intf_id < module_id + num_interfaces) {
891 return module->interfaces[intf_id - module_id];
892 }
893 }
894
895 return NULL;
896 }
897
898 static struct gb_module *gb_svc_module_lookup(struct gb_svc *svc, u8 module_id)
899 {
900 struct gb_host_device *hd = svc->hd;
901 struct gb_module *module;
902
903 list_for_each_entry(module, &hd->modules, hd_node) {
904 if (module->module_id == module_id)
905 return module;
906 }
907
908 return NULL;
909 }
910
911 static void gb_svc_process_hello_deferred(struct gb_operation *operation)
912 {
913 struct gb_connection *connection = operation->connection;
914 struct gb_svc *svc = gb_connection_get_data(connection);
915 int ret;
916
917
918
919
920
921
922
923
924
925
926 ret = gb_svc_intf_set_power_mode(svc, svc->ap_intf_id,
927 GB_SVC_UNIPRO_HS_SERIES_A,
928 GB_SVC_UNIPRO_SLOW_AUTO_MODE,
929 2, 1,
930 GB_SVC_SMALL_AMPLITUDE,
931 GB_SVC_NO_DE_EMPHASIS,
932 GB_SVC_UNIPRO_SLOW_AUTO_MODE,
933 2, 1,
934 0, 0,
935 NULL, NULL);
936
937 if (ret)
938 dev_warn(&svc->dev,
939 "power mode change failed on AP to switch link: %d\n",
940 ret);
941 }
942
943 static void gb_svc_process_module_inserted(struct gb_operation *operation)
944 {
945 struct gb_svc_module_inserted_request *request;
946 struct gb_connection *connection = operation->connection;
947 struct gb_svc *svc = gb_connection_get_data(connection);
948 struct gb_host_device *hd = svc->hd;
949 struct gb_module *module;
950 size_t num_interfaces;
951 u8 module_id;
952 u16 flags;
953 int ret;
954
955
956 request = operation->request->payload;
957 module_id = request->primary_intf_id;
958 num_interfaces = request->intf_count;
959 flags = le16_to_cpu(request->flags);
960
961 dev_dbg(&svc->dev, "%s - id = %u, num_interfaces = %zu, flags = 0x%04x\n",
962 __func__, module_id, num_interfaces, flags);
963
964 if (flags & GB_SVC_MODULE_INSERTED_FLAG_NO_PRIMARY) {
965 dev_warn(&svc->dev, "no primary interface detected on module %u\n",
966 module_id);
967 }
968
969 module = gb_svc_module_lookup(svc, module_id);
970 if (module) {
971 dev_warn(&svc->dev, "unexpected module-inserted event %u\n",
972 module_id);
973 return;
974 }
975
976 module = gb_module_create(hd, module_id, num_interfaces);
977 if (!module) {
978 dev_err(&svc->dev, "failed to create module\n");
979 return;
980 }
981
982 ret = gb_module_add(module);
983 if (ret) {
984 gb_module_put(module);
985 return;
986 }
987
988 list_add(&module->hd_node, &hd->modules);
989 }
990
991 static void gb_svc_process_module_removed(struct gb_operation *operation)
992 {
993 struct gb_svc_module_removed_request *request;
994 struct gb_connection *connection = operation->connection;
995 struct gb_svc *svc = gb_connection_get_data(connection);
996 struct gb_module *module;
997 u8 module_id;
998
999
1000 request = operation->request->payload;
1001 module_id = request->primary_intf_id;
1002
1003 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, module_id);
1004
1005 module = gb_svc_module_lookup(svc, module_id);
1006 if (!module) {
1007 dev_warn(&svc->dev, "unexpected module-removed event %u\n",
1008 module_id);
1009 return;
1010 }
1011
1012 module->disconnected = true;
1013
1014 gb_module_del(module);
1015 list_del(&module->hd_node);
1016 gb_module_put(module);
1017 }
1018
1019 static void gb_svc_process_intf_oops(struct gb_operation *operation)
1020 {
1021 struct gb_svc_intf_oops_request *request;
1022 struct gb_connection *connection = operation->connection;
1023 struct gb_svc *svc = gb_connection_get_data(connection);
1024 struct gb_interface *intf;
1025 u8 intf_id;
1026 u8 reason;
1027
1028
1029 request = operation->request->payload;
1030 intf_id = request->intf_id;
1031 reason = request->reason;
1032
1033 intf = gb_svc_interface_lookup(svc, intf_id);
1034 if (!intf) {
1035 dev_warn(&svc->dev, "unexpected interface-oops event %u\n",
1036 intf_id);
1037 return;
1038 }
1039
1040 dev_info(&svc->dev, "Deactivating interface %u, interface oops reason = %u\n",
1041 intf_id, reason);
1042
1043 mutex_lock(&intf->mutex);
1044 intf->disconnected = true;
1045 gb_interface_disable(intf);
1046 gb_interface_deactivate(intf);
1047 mutex_unlock(&intf->mutex);
1048 }
1049
1050 static void gb_svc_process_intf_mailbox_event(struct gb_operation *operation)
1051 {
1052 struct gb_svc_intf_mailbox_event_request *request;
1053 struct gb_connection *connection = operation->connection;
1054 struct gb_svc *svc = gb_connection_get_data(connection);
1055 struct gb_interface *intf;
1056 u8 intf_id;
1057 u16 result_code;
1058 u32 mailbox;
1059
1060
1061 request = operation->request->payload;
1062 intf_id = request->intf_id;
1063 result_code = le16_to_cpu(request->result_code);
1064 mailbox = le32_to_cpu(request->mailbox);
1065
1066 dev_dbg(&svc->dev, "%s - id = %u, result = 0x%04x, mailbox = 0x%08x\n",
1067 __func__, intf_id, result_code, mailbox);
1068
1069 intf = gb_svc_interface_lookup(svc, intf_id);
1070 if (!intf) {
1071 dev_warn(&svc->dev, "unexpected mailbox event %u\n", intf_id);
1072 return;
1073 }
1074
1075 gb_interface_mailbox_event(intf, result_code, mailbox);
1076 }
1077
1078 static void gb_svc_process_deferred_request(struct work_struct *work)
1079 {
1080 struct gb_svc_deferred_request *dr;
1081 struct gb_operation *operation;
1082 struct gb_svc *svc;
1083 u8 type;
1084
1085 dr = container_of(work, struct gb_svc_deferred_request, work);
1086 operation = dr->operation;
1087 svc = gb_connection_get_data(operation->connection);
1088 type = operation->request->header->type;
1089
1090 switch (type) {
1091 case GB_SVC_TYPE_SVC_HELLO:
1092 gb_svc_process_hello_deferred(operation);
1093 break;
1094 case GB_SVC_TYPE_MODULE_INSERTED:
1095 gb_svc_process_module_inserted(operation);
1096 break;
1097 case GB_SVC_TYPE_MODULE_REMOVED:
1098 gb_svc_process_module_removed(operation);
1099 break;
1100 case GB_SVC_TYPE_INTF_MAILBOX_EVENT:
1101 gb_svc_process_intf_mailbox_event(operation);
1102 break;
1103 case GB_SVC_TYPE_INTF_OOPS:
1104 gb_svc_process_intf_oops(operation);
1105 break;
1106 default:
1107 dev_err(&svc->dev, "bad deferred request type: 0x%02x\n", type);
1108 }
1109
1110 gb_operation_put(operation);
1111 kfree(dr);
1112 }
1113
1114 static int gb_svc_queue_deferred_request(struct gb_operation *operation)
1115 {
1116 struct gb_svc *svc = gb_connection_get_data(operation->connection);
1117 struct gb_svc_deferred_request *dr;
1118
1119 dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1120 if (!dr)
1121 return -ENOMEM;
1122
1123 gb_operation_get(operation);
1124
1125 dr->operation = operation;
1126 INIT_WORK(&dr->work, gb_svc_process_deferred_request);
1127
1128 queue_work(svc->wq, &dr->work);
1129
1130 return 0;
1131 }
1132
1133 static int gb_svc_intf_reset_recv(struct gb_operation *op)
1134 {
1135 struct gb_svc *svc = gb_connection_get_data(op->connection);
1136 struct gb_message *request = op->request;
1137 struct gb_svc_intf_reset_request *reset;
1138
1139 if (request->payload_size < sizeof(*reset)) {
1140 dev_warn(&svc->dev, "short reset request received (%zu < %zu)\n",
1141 request->payload_size, sizeof(*reset));
1142 return -EINVAL;
1143 }
1144 reset = request->payload;
1145
1146
1147
1148 return 0;
1149 }
1150
1151 static int gb_svc_module_inserted_recv(struct gb_operation *op)
1152 {
1153 struct gb_svc *svc = gb_connection_get_data(op->connection);
1154 struct gb_svc_module_inserted_request *request;
1155
1156 if (op->request->payload_size < sizeof(*request)) {
1157 dev_warn(&svc->dev, "short module-inserted request received (%zu < %zu)\n",
1158 op->request->payload_size, sizeof(*request));
1159 return -EINVAL;
1160 }
1161
1162 request = op->request->payload;
1163
1164 dev_dbg(&svc->dev, "%s - id = %u\n", __func__,
1165 request->primary_intf_id);
1166
1167 return gb_svc_queue_deferred_request(op);
1168 }
1169
1170 static int gb_svc_module_removed_recv(struct gb_operation *op)
1171 {
1172 struct gb_svc *svc = gb_connection_get_data(op->connection);
1173 struct gb_svc_module_removed_request *request;
1174
1175 if (op->request->payload_size < sizeof(*request)) {
1176 dev_warn(&svc->dev, "short module-removed request received (%zu < %zu)\n",
1177 op->request->payload_size, sizeof(*request));
1178 return -EINVAL;
1179 }
1180
1181 request = op->request->payload;
1182
1183 dev_dbg(&svc->dev, "%s - id = %u\n", __func__,
1184 request->primary_intf_id);
1185
1186 return gb_svc_queue_deferred_request(op);
1187 }
1188
1189 static int gb_svc_intf_oops_recv(struct gb_operation *op)
1190 {
1191 struct gb_svc *svc = gb_connection_get_data(op->connection);
1192 struct gb_svc_intf_oops_request *request;
1193
1194 if (op->request->payload_size < sizeof(*request)) {
1195 dev_warn(&svc->dev, "short intf-oops request received (%zu < %zu)\n",
1196 op->request->payload_size, sizeof(*request));
1197 return -EINVAL;
1198 }
1199
1200 return gb_svc_queue_deferred_request(op);
1201 }
1202
1203 static int gb_svc_intf_mailbox_event_recv(struct gb_operation *op)
1204 {
1205 struct gb_svc *svc = gb_connection_get_data(op->connection);
1206 struct gb_svc_intf_mailbox_event_request *request;
1207
1208 if (op->request->payload_size < sizeof(*request)) {
1209 dev_warn(&svc->dev, "short mailbox request received (%zu < %zu)\n",
1210 op->request->payload_size, sizeof(*request));
1211 return -EINVAL;
1212 }
1213
1214 request = op->request->payload;
1215
1216 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, request->intf_id);
1217
1218 return gb_svc_queue_deferred_request(op);
1219 }
1220
1221 static int gb_svc_request_handler(struct gb_operation *op)
1222 {
1223 struct gb_connection *connection = op->connection;
1224 struct gb_svc *svc = gb_connection_get_data(connection);
1225 u8 type = op->type;
1226 int ret = 0;
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238 switch (type) {
1239 case GB_SVC_TYPE_PROTOCOL_VERSION:
1240 if (svc->state != GB_SVC_STATE_RESET)
1241 ret = -EINVAL;
1242 break;
1243 case GB_SVC_TYPE_SVC_HELLO:
1244 if (svc->state != GB_SVC_STATE_PROTOCOL_VERSION)
1245 ret = -EINVAL;
1246 break;
1247 default:
1248 if (svc->state != GB_SVC_STATE_SVC_HELLO)
1249 ret = -EINVAL;
1250 break;
1251 }
1252
1253 if (ret) {
1254 dev_warn(&svc->dev, "unexpected request 0x%02x received (state %u)\n",
1255 type, svc->state);
1256 return ret;
1257 }
1258
1259 switch (type) {
1260 case GB_SVC_TYPE_PROTOCOL_VERSION:
1261 ret = gb_svc_version_request(op);
1262 if (!ret)
1263 svc->state = GB_SVC_STATE_PROTOCOL_VERSION;
1264 return ret;
1265 case GB_SVC_TYPE_SVC_HELLO:
1266 ret = gb_svc_hello(op);
1267 if (!ret)
1268 svc->state = GB_SVC_STATE_SVC_HELLO;
1269 return ret;
1270 case GB_SVC_TYPE_INTF_RESET:
1271 return gb_svc_intf_reset_recv(op);
1272 case GB_SVC_TYPE_MODULE_INSERTED:
1273 return gb_svc_module_inserted_recv(op);
1274 case GB_SVC_TYPE_MODULE_REMOVED:
1275 return gb_svc_module_removed_recv(op);
1276 case GB_SVC_TYPE_INTF_MAILBOX_EVENT:
1277 return gb_svc_intf_mailbox_event_recv(op);
1278 case GB_SVC_TYPE_INTF_OOPS:
1279 return gb_svc_intf_oops_recv(op);
1280 default:
1281 dev_warn(&svc->dev, "unsupported request 0x%02x\n", type);
1282 return -EINVAL;
1283 }
1284 }
1285
1286 static void gb_svc_release(struct device *dev)
1287 {
1288 struct gb_svc *svc = to_gb_svc(dev);
1289
1290 if (svc->connection)
1291 gb_connection_destroy(svc->connection);
1292 ida_destroy(&svc->device_id_map);
1293 destroy_workqueue(svc->wq);
1294 kfree(svc);
1295 }
1296
1297 struct device_type greybus_svc_type = {
1298 .name = "greybus_svc",
1299 .release = gb_svc_release,
1300 };
1301
1302 struct gb_svc *gb_svc_create(struct gb_host_device *hd)
1303 {
1304 struct gb_svc *svc;
1305
1306 svc = kzalloc(sizeof(*svc), GFP_KERNEL);
1307 if (!svc)
1308 return NULL;
1309
1310 svc->wq = alloc_workqueue("%s:svc", WQ_UNBOUND, 1, dev_name(&hd->dev));
1311 if (!svc->wq) {
1312 kfree(svc);
1313 return NULL;
1314 }
1315
1316 svc->dev.parent = &hd->dev;
1317 svc->dev.bus = &greybus_bus_type;
1318 svc->dev.type = &greybus_svc_type;
1319 svc->dev.groups = svc_groups;
1320 svc->dev.dma_mask = svc->dev.parent->dma_mask;
1321 device_initialize(&svc->dev);
1322
1323 dev_set_name(&svc->dev, "%d-svc", hd->bus_id);
1324
1325 ida_init(&svc->device_id_map);
1326 svc->state = GB_SVC_STATE_RESET;
1327 svc->hd = hd;
1328
1329 svc->connection = gb_connection_create_static(hd, GB_SVC_CPORT_ID,
1330 gb_svc_request_handler);
1331 if (IS_ERR(svc->connection)) {
1332 dev_err(&svc->dev, "failed to create connection: %ld\n",
1333 PTR_ERR(svc->connection));
1334 goto err_put_device;
1335 }
1336
1337 gb_connection_set_data(svc->connection, svc);
1338
1339 return svc;
1340
1341 err_put_device:
1342 put_device(&svc->dev);
1343 return NULL;
1344 }
1345
1346 int gb_svc_add(struct gb_svc *svc)
1347 {
1348 int ret;
1349
1350
1351
1352
1353
1354
1355 ret = gb_connection_enable(svc->connection);
1356 if (ret)
1357 return ret;
1358
1359 return 0;
1360 }
1361
1362 static void gb_svc_remove_modules(struct gb_svc *svc)
1363 {
1364 struct gb_host_device *hd = svc->hd;
1365 struct gb_module *module, *tmp;
1366
1367 list_for_each_entry_safe(module, tmp, &hd->modules, hd_node) {
1368 gb_module_del(module);
1369 list_del(&module->hd_node);
1370 gb_module_put(module);
1371 }
1372 }
1373
1374 void gb_svc_del(struct gb_svc *svc)
1375 {
1376 gb_connection_disable_rx(svc->connection);
1377
1378
1379
1380
1381 if (device_is_registered(&svc->dev)) {
1382 gb_svc_debugfs_exit(svc);
1383 gb_svc_watchdog_destroy(svc);
1384 device_del(&svc->dev);
1385 }
1386
1387 flush_workqueue(svc->wq);
1388
1389 gb_svc_remove_modules(svc);
1390
1391 gb_connection_disable(svc->connection);
1392 }
1393
1394 void gb_svc_put(struct gb_svc *svc)
1395 {
1396 put_device(&svc->dev);
1397 }