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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. | |
2a1d9b7f | 3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
1da177e4 LT |
4 | * |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | * | |
33 | * $Id: device.c 1349 2004-12-16 21:09:43Z roland $ | |
34 | */ | |
35 | ||
36 | #include <linux/module.h> | |
37 | #include <linux/string.h> | |
38 | #include <linux/errno.h> | |
9a6b090c | 39 | #include <linux/kernel.h> |
1da177e4 LT |
40 | #include <linux/slab.h> |
41 | #include <linux/init.h> | |
95ed644f | 42 | #include <linux/mutex.h> |
e8edc6e0 | 43 | #include <linux/workqueue.h> |
1da177e4 LT |
44 | |
45 | #include "core_priv.h" | |
46 | ||
47 | MODULE_AUTHOR("Roland Dreier"); | |
48 | MODULE_DESCRIPTION("core kernel InfiniBand API"); | |
49 | MODULE_LICENSE("Dual BSD/GPL"); | |
50 | ||
51 | struct ib_client_data { | |
52 | struct list_head list; | |
53 | struct ib_client *client; | |
54 | void * data; | |
55 | }; | |
56 | ||
57 | static LIST_HEAD(device_list); | |
58 | static LIST_HEAD(client_list); | |
59 | ||
60 | /* | |
95ed644f | 61 | * device_mutex protects access to both device_list and client_list. |
1da177e4 LT |
62 | * There's no real point to using multiple locks or something fancier |
63 | * like an rwsem: we always access both lists, and we're always | |
64 | * modifying one list or the other list. In any case this is not a | |
65 | * hot path so there's no point in trying to optimize. | |
66 | */ | |
95ed644f | 67 | static DEFINE_MUTEX(device_mutex); |
1da177e4 LT |
68 | |
69 | static int ib_device_check_mandatory(struct ib_device *device) | |
70 | { | |
71 | #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } | |
72 | static const struct { | |
73 | size_t offset; | |
74 | char *name; | |
75 | } mandatory_table[] = { | |
76 | IB_MANDATORY_FUNC(query_device), | |
77 | IB_MANDATORY_FUNC(query_port), | |
78 | IB_MANDATORY_FUNC(query_pkey), | |
79 | IB_MANDATORY_FUNC(query_gid), | |
80 | IB_MANDATORY_FUNC(alloc_pd), | |
81 | IB_MANDATORY_FUNC(dealloc_pd), | |
82 | IB_MANDATORY_FUNC(create_ah), | |
83 | IB_MANDATORY_FUNC(destroy_ah), | |
84 | IB_MANDATORY_FUNC(create_qp), | |
85 | IB_MANDATORY_FUNC(modify_qp), | |
86 | IB_MANDATORY_FUNC(destroy_qp), | |
87 | IB_MANDATORY_FUNC(post_send), | |
88 | IB_MANDATORY_FUNC(post_recv), | |
89 | IB_MANDATORY_FUNC(create_cq), | |
90 | IB_MANDATORY_FUNC(destroy_cq), | |
91 | IB_MANDATORY_FUNC(poll_cq), | |
92 | IB_MANDATORY_FUNC(req_notify_cq), | |
93 | IB_MANDATORY_FUNC(get_dma_mr), | |
94 | IB_MANDATORY_FUNC(dereg_mr) | |
95 | }; | |
96 | int i; | |
97 | ||
9a6b090c | 98 | for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { |
1da177e4 LT |
99 | if (!*(void **) ((void *) device + mandatory_table[i].offset)) { |
100 | printk(KERN_WARNING "Device %s is missing mandatory function %s\n", | |
101 | device->name, mandatory_table[i].name); | |
102 | return -EINVAL; | |
103 | } | |
104 | } | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | static struct ib_device *__ib_device_get_by_name(const char *name) | |
110 | { | |
111 | struct ib_device *device; | |
112 | ||
113 | list_for_each_entry(device, &device_list, core_list) | |
114 | if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) | |
115 | return device; | |
116 | ||
117 | return NULL; | |
118 | } | |
119 | ||
120 | ||
121 | static int alloc_name(char *name) | |
122 | { | |
65d470b3 | 123 | unsigned long *inuse; |
1da177e4 LT |
124 | char buf[IB_DEVICE_NAME_MAX]; |
125 | struct ib_device *device; | |
126 | int i; | |
127 | ||
65d470b3 | 128 | inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
129 | if (!inuse) |
130 | return -ENOMEM; | |
131 | ||
132 | list_for_each_entry(device, &device_list, core_list) { | |
133 | if (!sscanf(device->name, name, &i)) | |
134 | continue; | |
135 | if (i < 0 || i >= PAGE_SIZE * 8) | |
136 | continue; | |
137 | snprintf(buf, sizeof buf, name, i); | |
138 | if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) | |
139 | set_bit(i, inuse); | |
140 | } | |
141 | ||
142 | i = find_first_zero_bit(inuse, PAGE_SIZE * 8); | |
143 | free_page((unsigned long) inuse); | |
144 | snprintf(buf, sizeof buf, name, i); | |
145 | ||
146 | if (__ib_device_get_by_name(buf)) | |
147 | return -ENFILE; | |
148 | ||
149 | strlcpy(name, buf, IB_DEVICE_NAME_MAX); | |
150 | return 0; | |
151 | } | |
152 | ||
5eb620c8 YE |
153 | static int start_port(struct ib_device *device) |
154 | { | |
155 | return (device->node_type == RDMA_NODE_IB_SWITCH) ? 0 : 1; | |
156 | } | |
157 | ||
158 | ||
159 | static int end_port(struct ib_device *device) | |
160 | { | |
161 | return (device->node_type == RDMA_NODE_IB_SWITCH) ? | |
162 | 0 : device->phys_port_cnt; | |
163 | } | |
164 | ||
1da177e4 LT |
165 | /** |
166 | * ib_alloc_device - allocate an IB device struct | |
167 | * @size:size of structure to allocate | |
168 | * | |
169 | * Low-level drivers should use ib_alloc_device() to allocate &struct | |
170 | * ib_device. @size is the size of the structure to be allocated, | |
171 | * including any private data used by the low-level driver. | |
172 | * ib_dealloc_device() must be used to free structures allocated with | |
173 | * ib_alloc_device(). | |
174 | */ | |
175 | struct ib_device *ib_alloc_device(size_t size) | |
176 | { | |
1da177e4 LT |
177 | BUG_ON(size < sizeof (struct ib_device)); |
178 | ||
de6eb66b | 179 | return kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
180 | } |
181 | EXPORT_SYMBOL(ib_alloc_device); | |
182 | ||
183 | /** | |
184 | * ib_dealloc_device - free an IB device struct | |
185 | * @device:structure to free | |
186 | * | |
187 | * Free a structure allocated with ib_alloc_device(). | |
188 | */ | |
189 | void ib_dealloc_device(struct ib_device *device) | |
190 | { | |
191 | if (device->reg_state == IB_DEV_UNINITIALIZED) { | |
192 | kfree(device); | |
193 | return; | |
194 | } | |
195 | ||
196 | BUG_ON(device->reg_state != IB_DEV_UNREGISTERED); | |
197 | ||
198 | ib_device_unregister_sysfs(device); | |
199 | } | |
200 | EXPORT_SYMBOL(ib_dealloc_device); | |
201 | ||
202 | static int add_client_context(struct ib_device *device, struct ib_client *client) | |
203 | { | |
204 | struct ib_client_data *context; | |
205 | unsigned long flags; | |
206 | ||
207 | context = kmalloc(sizeof *context, GFP_KERNEL); | |
208 | if (!context) { | |
209 | printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n", | |
210 | device->name, client->name); | |
211 | return -ENOMEM; | |
212 | } | |
213 | ||
214 | context->client = client; | |
215 | context->data = NULL; | |
216 | ||
217 | spin_lock_irqsave(&device->client_data_lock, flags); | |
218 | list_add(&context->list, &device->client_data_list); | |
219 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
5eb620c8 YE |
224 | static int read_port_table_lengths(struct ib_device *device) |
225 | { | |
226 | struct ib_port_attr *tprops = NULL; | |
227 | int num_ports, ret = -ENOMEM; | |
228 | u8 port_index; | |
229 | ||
230 | tprops = kmalloc(sizeof *tprops, GFP_KERNEL); | |
231 | if (!tprops) | |
232 | goto out; | |
233 | ||
234 | num_ports = end_port(device) - start_port(device) + 1; | |
235 | ||
236 | device->pkey_tbl_len = kmalloc(sizeof *device->pkey_tbl_len * num_ports, | |
237 | GFP_KERNEL); | |
238 | device->gid_tbl_len = kmalloc(sizeof *device->gid_tbl_len * num_ports, | |
239 | GFP_KERNEL); | |
240 | if (!device->pkey_tbl_len || !device->gid_tbl_len) | |
241 | goto err; | |
242 | ||
243 | for (port_index = 0; port_index < num_ports; ++port_index) { | |
244 | ret = ib_query_port(device, port_index + start_port(device), | |
245 | tprops); | |
246 | if (ret) | |
247 | goto err; | |
248 | device->pkey_tbl_len[port_index] = tprops->pkey_tbl_len; | |
249 | device->gid_tbl_len[port_index] = tprops->gid_tbl_len; | |
250 | } | |
251 | ||
252 | ret = 0; | |
253 | goto out; | |
254 | ||
255 | err: | |
256 | kfree(device->gid_tbl_len); | |
257 | kfree(device->pkey_tbl_len); | |
258 | out: | |
259 | kfree(tprops); | |
260 | return ret; | |
261 | } | |
262 | ||
1da177e4 LT |
263 | /** |
264 | * ib_register_device - Register an IB device with IB core | |
265 | * @device:Device to register | |
266 | * | |
267 | * Low-level drivers use ib_register_device() to register their | |
268 | * devices with the IB core. All registered clients will receive a | |
269 | * callback for each device that is added. @device must be allocated | |
270 | * with ib_alloc_device(). | |
271 | */ | |
272 | int ib_register_device(struct ib_device *device) | |
273 | { | |
274 | int ret; | |
275 | ||
95ed644f | 276 | mutex_lock(&device_mutex); |
1da177e4 LT |
277 | |
278 | if (strchr(device->name, '%')) { | |
279 | ret = alloc_name(device->name); | |
280 | if (ret) | |
281 | goto out; | |
282 | } | |
283 | ||
284 | if (ib_device_check_mandatory(device)) { | |
285 | ret = -EINVAL; | |
286 | goto out; | |
287 | } | |
288 | ||
289 | INIT_LIST_HEAD(&device->event_handler_list); | |
290 | INIT_LIST_HEAD(&device->client_data_list); | |
291 | spin_lock_init(&device->event_handler_lock); | |
292 | spin_lock_init(&device->client_data_lock); | |
293 | ||
5eb620c8 YE |
294 | ret = read_port_table_lengths(device); |
295 | if (ret) { | |
296 | printk(KERN_WARNING "Couldn't create table lengths cache for device %s\n", | |
297 | device->name); | |
298 | goto out; | |
299 | } | |
300 | ||
1da177e4 LT |
301 | ret = ib_device_register_sysfs(device); |
302 | if (ret) { | |
303 | printk(KERN_WARNING "Couldn't register device %s with driver model\n", | |
304 | device->name); | |
5eb620c8 YE |
305 | kfree(device->gid_tbl_len); |
306 | kfree(device->pkey_tbl_len); | |
1da177e4 LT |
307 | goto out; |
308 | } | |
309 | ||
310 | list_add_tail(&device->core_list, &device_list); | |
311 | ||
312 | device->reg_state = IB_DEV_REGISTERED; | |
313 | ||
314 | { | |
315 | struct ib_client *client; | |
316 | ||
317 | list_for_each_entry(client, &client_list, list) | |
318 | if (client->add && !add_client_context(device, client)) | |
319 | client->add(device); | |
320 | } | |
321 | ||
322 | out: | |
95ed644f | 323 | mutex_unlock(&device_mutex); |
1da177e4 LT |
324 | return ret; |
325 | } | |
326 | EXPORT_SYMBOL(ib_register_device); | |
327 | ||
328 | /** | |
329 | * ib_unregister_device - Unregister an IB device | |
330 | * @device:Device to unregister | |
331 | * | |
332 | * Unregister an IB device. All clients will receive a remove callback. | |
333 | */ | |
334 | void ib_unregister_device(struct ib_device *device) | |
335 | { | |
336 | struct ib_client *client; | |
337 | struct ib_client_data *context, *tmp; | |
338 | unsigned long flags; | |
339 | ||
95ed644f | 340 | mutex_lock(&device_mutex); |
1da177e4 LT |
341 | |
342 | list_for_each_entry_reverse(client, &client_list, list) | |
343 | if (client->remove) | |
344 | client->remove(device); | |
345 | ||
346 | list_del(&device->core_list); | |
347 | ||
5eb620c8 YE |
348 | kfree(device->gid_tbl_len); |
349 | kfree(device->pkey_tbl_len); | |
350 | ||
95ed644f | 351 | mutex_unlock(&device_mutex); |
1da177e4 LT |
352 | |
353 | spin_lock_irqsave(&device->client_data_lock, flags); | |
354 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
355 | kfree(context); | |
356 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
357 | ||
358 | device->reg_state = IB_DEV_UNREGISTERED; | |
359 | } | |
360 | EXPORT_SYMBOL(ib_unregister_device); | |
361 | ||
362 | /** | |
363 | * ib_register_client - Register an IB client | |
364 | * @client:Client to register | |
365 | * | |
366 | * Upper level users of the IB drivers can use ib_register_client() to | |
367 | * register callbacks for IB device addition and removal. When an IB | |
368 | * device is added, each registered client's add method will be called | |
369 | * (in the order the clients were registered), and when a device is | |
370 | * removed, each client's remove method will be called (in the reverse | |
371 | * order that clients were registered). In addition, when | |
372 | * ib_register_client() is called, the client will receive an add | |
373 | * callback for all devices already registered. | |
374 | */ | |
375 | int ib_register_client(struct ib_client *client) | |
376 | { | |
377 | struct ib_device *device; | |
378 | ||
95ed644f | 379 | mutex_lock(&device_mutex); |
1da177e4 LT |
380 | |
381 | list_add_tail(&client->list, &client_list); | |
382 | list_for_each_entry(device, &device_list, core_list) | |
383 | if (client->add && !add_client_context(device, client)) | |
384 | client->add(device); | |
385 | ||
95ed644f | 386 | mutex_unlock(&device_mutex); |
1da177e4 LT |
387 | |
388 | return 0; | |
389 | } | |
390 | EXPORT_SYMBOL(ib_register_client); | |
391 | ||
392 | /** | |
393 | * ib_unregister_client - Unregister an IB client | |
394 | * @client:Client to unregister | |
395 | * | |
396 | * Upper level users use ib_unregister_client() to remove their client | |
397 | * registration. When ib_unregister_client() is called, the client | |
398 | * will receive a remove callback for each IB device still registered. | |
399 | */ | |
400 | void ib_unregister_client(struct ib_client *client) | |
401 | { | |
402 | struct ib_client_data *context, *tmp; | |
403 | struct ib_device *device; | |
404 | unsigned long flags; | |
405 | ||
95ed644f | 406 | mutex_lock(&device_mutex); |
1da177e4 LT |
407 | |
408 | list_for_each_entry(device, &device_list, core_list) { | |
409 | if (client->remove) | |
410 | client->remove(device); | |
411 | ||
412 | spin_lock_irqsave(&device->client_data_lock, flags); | |
413 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
414 | if (context->client == client) { | |
415 | list_del(&context->list); | |
416 | kfree(context); | |
417 | } | |
418 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
419 | } | |
420 | list_del(&client->list); | |
421 | ||
95ed644f | 422 | mutex_unlock(&device_mutex); |
1da177e4 LT |
423 | } |
424 | EXPORT_SYMBOL(ib_unregister_client); | |
425 | ||
426 | /** | |
427 | * ib_get_client_data - Get IB client context | |
428 | * @device:Device to get context for | |
429 | * @client:Client to get context for | |
430 | * | |
431 | * ib_get_client_data() returns client context set with | |
432 | * ib_set_client_data(). | |
433 | */ | |
434 | void *ib_get_client_data(struct ib_device *device, struct ib_client *client) | |
435 | { | |
436 | struct ib_client_data *context; | |
437 | void *ret = NULL; | |
438 | unsigned long flags; | |
439 | ||
440 | spin_lock_irqsave(&device->client_data_lock, flags); | |
441 | list_for_each_entry(context, &device->client_data_list, list) | |
442 | if (context->client == client) { | |
443 | ret = context->data; | |
444 | break; | |
445 | } | |
446 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
447 | ||
448 | return ret; | |
449 | } | |
450 | EXPORT_SYMBOL(ib_get_client_data); | |
451 | ||
452 | /** | |
9cd330d3 | 453 | * ib_set_client_data - Set IB client context |
1da177e4 LT |
454 | * @device:Device to set context for |
455 | * @client:Client to set context for | |
456 | * @data:Context to set | |
457 | * | |
458 | * ib_set_client_data() sets client context that can be retrieved with | |
459 | * ib_get_client_data(). | |
460 | */ | |
461 | void ib_set_client_data(struct ib_device *device, struct ib_client *client, | |
462 | void *data) | |
463 | { | |
464 | struct ib_client_data *context; | |
465 | unsigned long flags; | |
466 | ||
467 | spin_lock_irqsave(&device->client_data_lock, flags); | |
468 | list_for_each_entry(context, &device->client_data_list, list) | |
469 | if (context->client == client) { | |
470 | context->data = data; | |
471 | goto out; | |
472 | } | |
473 | ||
474 | printk(KERN_WARNING "No client context found for %s/%s\n", | |
475 | device->name, client->name); | |
476 | ||
477 | out: | |
478 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
479 | } | |
480 | EXPORT_SYMBOL(ib_set_client_data); | |
481 | ||
482 | /** | |
483 | * ib_register_event_handler - Register an IB event handler | |
484 | * @event_handler:Handler to register | |
485 | * | |
486 | * ib_register_event_handler() registers an event handler that will be | |
487 | * called back when asynchronous IB events occur (as defined in | |
488 | * chapter 11 of the InfiniBand Architecture Specification). This | |
489 | * callback may occur in interrupt context. | |
490 | */ | |
491 | int ib_register_event_handler (struct ib_event_handler *event_handler) | |
492 | { | |
493 | unsigned long flags; | |
494 | ||
495 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
496 | list_add_tail(&event_handler->list, | |
497 | &event_handler->device->event_handler_list); | |
498 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
499 | ||
500 | return 0; | |
501 | } | |
502 | EXPORT_SYMBOL(ib_register_event_handler); | |
503 | ||
504 | /** | |
505 | * ib_unregister_event_handler - Unregister an event handler | |
506 | * @event_handler:Handler to unregister | |
507 | * | |
508 | * Unregister an event handler registered with | |
509 | * ib_register_event_handler(). | |
510 | */ | |
511 | int ib_unregister_event_handler(struct ib_event_handler *event_handler) | |
512 | { | |
513 | unsigned long flags; | |
514 | ||
515 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
516 | list_del(&event_handler->list); | |
517 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
518 | ||
519 | return 0; | |
520 | } | |
521 | EXPORT_SYMBOL(ib_unregister_event_handler); | |
522 | ||
523 | /** | |
524 | * ib_dispatch_event - Dispatch an asynchronous event | |
525 | * @event:Event to dispatch | |
526 | * | |
527 | * Low-level drivers must call ib_dispatch_event() to dispatch the | |
528 | * event to all registered event handlers when an asynchronous event | |
529 | * occurs. | |
530 | */ | |
531 | void ib_dispatch_event(struct ib_event *event) | |
532 | { | |
533 | unsigned long flags; | |
534 | struct ib_event_handler *handler; | |
535 | ||
536 | spin_lock_irqsave(&event->device->event_handler_lock, flags); | |
537 | ||
538 | list_for_each_entry(handler, &event->device->event_handler_list, list) | |
539 | handler->handler(handler, event); | |
540 | ||
541 | spin_unlock_irqrestore(&event->device->event_handler_lock, flags); | |
542 | } | |
543 | EXPORT_SYMBOL(ib_dispatch_event); | |
544 | ||
545 | /** | |
546 | * ib_query_device - Query IB device attributes | |
547 | * @device:Device to query | |
548 | * @device_attr:Device attributes | |
549 | * | |
550 | * ib_query_device() returns the attributes of a device through the | |
551 | * @device_attr pointer. | |
552 | */ | |
553 | int ib_query_device(struct ib_device *device, | |
554 | struct ib_device_attr *device_attr) | |
555 | { | |
556 | return device->query_device(device, device_attr); | |
557 | } | |
558 | EXPORT_SYMBOL(ib_query_device); | |
559 | ||
560 | /** | |
561 | * ib_query_port - Query IB port attributes | |
562 | * @device:Device to query | |
563 | * @port_num:Port number to query | |
564 | * @port_attr:Port attributes | |
565 | * | |
566 | * ib_query_port() returns the attributes of a port through the | |
567 | * @port_attr pointer. | |
568 | */ | |
569 | int ib_query_port(struct ib_device *device, | |
570 | u8 port_num, | |
571 | struct ib_port_attr *port_attr) | |
572 | { | |
1af4c435 | 573 | if (port_num < start_port(device) || port_num > end_port(device)) |
116c0074 RD |
574 | return -EINVAL; |
575 | ||
1da177e4 LT |
576 | return device->query_port(device, port_num, port_attr); |
577 | } | |
578 | EXPORT_SYMBOL(ib_query_port); | |
579 | ||
580 | /** | |
581 | * ib_query_gid - Get GID table entry | |
582 | * @device:Device to query | |
583 | * @port_num:Port number to query | |
584 | * @index:GID table index to query | |
585 | * @gid:Returned GID | |
586 | * | |
587 | * ib_query_gid() fetches the specified GID table entry. | |
588 | */ | |
589 | int ib_query_gid(struct ib_device *device, | |
590 | u8 port_num, int index, union ib_gid *gid) | |
591 | { | |
592 | return device->query_gid(device, port_num, index, gid); | |
593 | } | |
594 | EXPORT_SYMBOL(ib_query_gid); | |
595 | ||
596 | /** | |
597 | * ib_query_pkey - Get P_Key table entry | |
598 | * @device:Device to query | |
599 | * @port_num:Port number to query | |
600 | * @index:P_Key table index to query | |
601 | * @pkey:Returned P_Key | |
602 | * | |
603 | * ib_query_pkey() fetches the specified P_Key table entry. | |
604 | */ | |
605 | int ib_query_pkey(struct ib_device *device, | |
606 | u8 port_num, u16 index, u16 *pkey) | |
607 | { | |
608 | return device->query_pkey(device, port_num, index, pkey); | |
609 | } | |
610 | EXPORT_SYMBOL(ib_query_pkey); | |
611 | ||
612 | /** | |
613 | * ib_modify_device - Change IB device attributes | |
614 | * @device:Device to modify | |
615 | * @device_modify_mask:Mask of attributes to change | |
616 | * @device_modify:New attribute values | |
617 | * | |
618 | * ib_modify_device() changes a device's attributes as specified by | |
619 | * the @device_modify_mask and @device_modify structure. | |
620 | */ | |
621 | int ib_modify_device(struct ib_device *device, | |
622 | int device_modify_mask, | |
623 | struct ib_device_modify *device_modify) | |
624 | { | |
625 | return device->modify_device(device, device_modify_mask, | |
626 | device_modify); | |
627 | } | |
628 | EXPORT_SYMBOL(ib_modify_device); | |
629 | ||
630 | /** | |
631 | * ib_modify_port - Modifies the attributes for the specified port. | |
632 | * @device: The device to modify. | |
633 | * @port_num: The number of the port to modify. | |
634 | * @port_modify_mask: Mask used to specify which attributes of the port | |
635 | * to change. | |
636 | * @port_modify: New attribute values for the port. | |
637 | * | |
638 | * ib_modify_port() changes a port's attributes as specified by the | |
639 | * @port_modify_mask and @port_modify structure. | |
640 | */ | |
641 | int ib_modify_port(struct ib_device *device, | |
642 | u8 port_num, int port_modify_mask, | |
643 | struct ib_port_modify *port_modify) | |
644 | { | |
1af4c435 | 645 | if (port_num < start_port(device) || port_num > end_port(device)) |
116c0074 RD |
646 | return -EINVAL; |
647 | ||
1da177e4 LT |
648 | return device->modify_port(device, port_num, port_modify_mask, |
649 | port_modify); | |
650 | } | |
651 | EXPORT_SYMBOL(ib_modify_port); | |
652 | ||
5eb620c8 YE |
653 | /** |
654 | * ib_find_gid - Returns the port number and GID table index where | |
655 | * a specified GID value occurs. | |
656 | * @device: The device to query. | |
657 | * @gid: The GID value to search for. | |
658 | * @port_num: The port number of the device where the GID value was found. | |
659 | * @index: The index into the GID table where the GID was found. This | |
660 | * parameter may be NULL. | |
661 | */ | |
662 | int ib_find_gid(struct ib_device *device, union ib_gid *gid, | |
663 | u8 *port_num, u16 *index) | |
664 | { | |
665 | union ib_gid tmp_gid; | |
666 | int ret, port, i; | |
667 | ||
668 | for (port = start_port(device); port <= end_port(device); ++port) { | |
669 | for (i = 0; i < device->gid_tbl_len[port - start_port(device)]; ++i) { | |
670 | ret = ib_query_gid(device, port, i, &tmp_gid); | |
671 | if (ret) | |
672 | return ret; | |
673 | if (!memcmp(&tmp_gid, gid, sizeof *gid)) { | |
674 | *port_num = port; | |
675 | if (index) | |
676 | *index = i; | |
677 | return 0; | |
678 | } | |
679 | } | |
680 | } | |
681 | ||
682 | return -ENOENT; | |
683 | } | |
684 | EXPORT_SYMBOL(ib_find_gid); | |
685 | ||
686 | /** | |
687 | * ib_find_pkey - Returns the PKey table index where a specified | |
688 | * PKey value occurs. | |
689 | * @device: The device to query. | |
690 | * @port_num: The port number of the device to search for the PKey. | |
691 | * @pkey: The PKey value to search for. | |
692 | * @index: The index into the PKey table where the PKey was found. | |
693 | */ | |
694 | int ib_find_pkey(struct ib_device *device, | |
695 | u8 port_num, u16 pkey, u16 *index) | |
696 | { | |
697 | int ret, i; | |
698 | u16 tmp_pkey; | |
699 | ||
700 | for (i = 0; i < device->pkey_tbl_len[port_num - start_port(device)]; ++i) { | |
701 | ret = ib_query_pkey(device, port_num, i, &tmp_pkey); | |
702 | if (ret) | |
703 | return ret; | |
704 | ||
36026ecc | 705 | if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { |
5eb620c8 YE |
706 | *index = i; |
707 | return 0; | |
708 | } | |
709 | } | |
710 | ||
711 | return -ENOENT; | |
712 | } | |
713 | EXPORT_SYMBOL(ib_find_pkey); | |
714 | ||
1da177e4 LT |
715 | static int __init ib_core_init(void) |
716 | { | |
717 | int ret; | |
718 | ||
719 | ret = ib_sysfs_setup(); | |
720 | if (ret) | |
721 | printk(KERN_WARNING "Couldn't create InfiniBand device class\n"); | |
722 | ||
723 | ret = ib_cache_setup(); | |
724 | if (ret) { | |
725 | printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n"); | |
726 | ib_sysfs_cleanup(); | |
727 | } | |
728 | ||
729 | return ret; | |
730 | } | |
731 | ||
732 | static void __exit ib_core_cleanup(void) | |
733 | { | |
734 | ib_cache_cleanup(); | |
735 | ib_sysfs_cleanup(); | |
f7c6a7b5 RD |
736 | /* Make sure that any pending umem accounting work is done. */ |
737 | flush_scheduled_work(); | |
1da177e4 LT |
738 | } |
739 | ||
740 | module_init(ib_core_init); | |
741 | module_exit(ib_core_cleanup); |