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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> |
1da177e4 LT |
43 | |
44 | #include "core_priv.h" | |
45 | ||
46 | MODULE_AUTHOR("Roland Dreier"); | |
47 | MODULE_DESCRIPTION("core kernel InfiniBand API"); | |
48 | MODULE_LICENSE("Dual BSD/GPL"); | |
49 | ||
50 | struct ib_client_data { | |
51 | struct list_head list; | |
52 | struct ib_client *client; | |
53 | void * data; | |
54 | }; | |
55 | ||
56 | static LIST_HEAD(device_list); | |
57 | static LIST_HEAD(client_list); | |
58 | ||
59 | /* | |
95ed644f | 60 | * device_mutex protects access to both device_list and client_list. |
1da177e4 LT |
61 | * There's no real point to using multiple locks or something fancier |
62 | * like an rwsem: we always access both lists, and we're always | |
63 | * modifying one list or the other list. In any case this is not a | |
64 | * hot path so there's no point in trying to optimize. | |
65 | */ | |
95ed644f | 66 | static DEFINE_MUTEX(device_mutex); |
1da177e4 LT |
67 | |
68 | static int ib_device_check_mandatory(struct ib_device *device) | |
69 | { | |
70 | #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } | |
71 | static const struct { | |
72 | size_t offset; | |
73 | char *name; | |
74 | } mandatory_table[] = { | |
75 | IB_MANDATORY_FUNC(query_device), | |
76 | IB_MANDATORY_FUNC(query_port), | |
77 | IB_MANDATORY_FUNC(query_pkey), | |
78 | IB_MANDATORY_FUNC(query_gid), | |
79 | IB_MANDATORY_FUNC(alloc_pd), | |
80 | IB_MANDATORY_FUNC(dealloc_pd), | |
81 | IB_MANDATORY_FUNC(create_ah), | |
82 | IB_MANDATORY_FUNC(destroy_ah), | |
83 | IB_MANDATORY_FUNC(create_qp), | |
84 | IB_MANDATORY_FUNC(modify_qp), | |
85 | IB_MANDATORY_FUNC(destroy_qp), | |
86 | IB_MANDATORY_FUNC(post_send), | |
87 | IB_MANDATORY_FUNC(post_recv), | |
88 | IB_MANDATORY_FUNC(create_cq), | |
89 | IB_MANDATORY_FUNC(destroy_cq), | |
90 | IB_MANDATORY_FUNC(poll_cq), | |
91 | IB_MANDATORY_FUNC(req_notify_cq), | |
92 | IB_MANDATORY_FUNC(get_dma_mr), | |
93 | IB_MANDATORY_FUNC(dereg_mr) | |
94 | }; | |
95 | int i; | |
96 | ||
9a6b090c | 97 | for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { |
1da177e4 LT |
98 | if (!*(void **) ((void *) device + mandatory_table[i].offset)) { |
99 | printk(KERN_WARNING "Device %s is missing mandatory function %s\n", | |
100 | device->name, mandatory_table[i].name); | |
101 | return -EINVAL; | |
102 | } | |
103 | } | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | static struct ib_device *__ib_device_get_by_name(const char *name) | |
109 | { | |
110 | struct ib_device *device; | |
111 | ||
112 | list_for_each_entry(device, &device_list, core_list) | |
113 | if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) | |
114 | return device; | |
115 | ||
116 | return NULL; | |
117 | } | |
118 | ||
119 | ||
120 | static int alloc_name(char *name) | |
121 | { | |
122 | long *inuse; | |
123 | char buf[IB_DEVICE_NAME_MAX]; | |
124 | struct ib_device *device; | |
125 | int i; | |
126 | ||
127 | inuse = (long *) get_zeroed_page(GFP_KERNEL); | |
128 | if (!inuse) | |
129 | return -ENOMEM; | |
130 | ||
131 | list_for_each_entry(device, &device_list, core_list) { | |
132 | if (!sscanf(device->name, name, &i)) | |
133 | continue; | |
134 | if (i < 0 || i >= PAGE_SIZE * 8) | |
135 | continue; | |
136 | snprintf(buf, sizeof buf, name, i); | |
137 | if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) | |
138 | set_bit(i, inuse); | |
139 | } | |
140 | ||
141 | i = find_first_zero_bit(inuse, PAGE_SIZE * 8); | |
142 | free_page((unsigned long) inuse); | |
143 | snprintf(buf, sizeof buf, name, i); | |
144 | ||
145 | if (__ib_device_get_by_name(buf)) | |
146 | return -ENFILE; | |
147 | ||
148 | strlcpy(name, buf, IB_DEVICE_NAME_MAX); | |
149 | return 0; | |
150 | } | |
151 | ||
5eb620c8 YE |
152 | static int start_port(struct ib_device *device) |
153 | { | |
154 | return (device->node_type == RDMA_NODE_IB_SWITCH) ? 0 : 1; | |
155 | } | |
156 | ||
157 | ||
158 | static int end_port(struct ib_device *device) | |
159 | { | |
160 | return (device->node_type == RDMA_NODE_IB_SWITCH) ? | |
161 | 0 : device->phys_port_cnt; | |
162 | } | |
163 | ||
1da177e4 LT |
164 | /** |
165 | * ib_alloc_device - allocate an IB device struct | |
166 | * @size:size of structure to allocate | |
167 | * | |
168 | * Low-level drivers should use ib_alloc_device() to allocate &struct | |
169 | * ib_device. @size is the size of the structure to be allocated, | |
170 | * including any private data used by the low-level driver. | |
171 | * ib_dealloc_device() must be used to free structures allocated with | |
172 | * ib_alloc_device(). | |
173 | */ | |
174 | struct ib_device *ib_alloc_device(size_t size) | |
175 | { | |
1da177e4 LT |
176 | BUG_ON(size < sizeof (struct ib_device)); |
177 | ||
de6eb66b | 178 | return kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
179 | } |
180 | EXPORT_SYMBOL(ib_alloc_device); | |
181 | ||
182 | /** | |
183 | * ib_dealloc_device - free an IB device struct | |
184 | * @device:structure to free | |
185 | * | |
186 | * Free a structure allocated with ib_alloc_device(). | |
187 | */ | |
188 | void ib_dealloc_device(struct ib_device *device) | |
189 | { | |
190 | if (device->reg_state == IB_DEV_UNINITIALIZED) { | |
191 | kfree(device); | |
192 | return; | |
193 | } | |
194 | ||
195 | BUG_ON(device->reg_state != IB_DEV_UNREGISTERED); | |
196 | ||
197 | ib_device_unregister_sysfs(device); | |
198 | } | |
199 | EXPORT_SYMBOL(ib_dealloc_device); | |
200 | ||
201 | static int add_client_context(struct ib_device *device, struct ib_client *client) | |
202 | { | |
203 | struct ib_client_data *context; | |
204 | unsigned long flags; | |
205 | ||
206 | context = kmalloc(sizeof *context, GFP_KERNEL); | |
207 | if (!context) { | |
208 | printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n", | |
209 | device->name, client->name); | |
210 | return -ENOMEM; | |
211 | } | |
212 | ||
213 | context->client = client; | |
214 | context->data = NULL; | |
215 | ||
216 | spin_lock_irqsave(&device->client_data_lock, flags); | |
217 | list_add(&context->list, &device->client_data_list); | |
218 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
5eb620c8 YE |
223 | static int read_port_table_lengths(struct ib_device *device) |
224 | { | |
225 | struct ib_port_attr *tprops = NULL; | |
226 | int num_ports, ret = -ENOMEM; | |
227 | u8 port_index; | |
228 | ||
229 | tprops = kmalloc(sizeof *tprops, GFP_KERNEL); | |
230 | if (!tprops) | |
231 | goto out; | |
232 | ||
233 | num_ports = end_port(device) - start_port(device) + 1; | |
234 | ||
235 | device->pkey_tbl_len = kmalloc(sizeof *device->pkey_tbl_len * num_ports, | |
236 | GFP_KERNEL); | |
237 | device->gid_tbl_len = kmalloc(sizeof *device->gid_tbl_len * num_ports, | |
238 | GFP_KERNEL); | |
239 | if (!device->pkey_tbl_len || !device->gid_tbl_len) | |
240 | goto err; | |
241 | ||
242 | for (port_index = 0; port_index < num_ports; ++port_index) { | |
243 | ret = ib_query_port(device, port_index + start_port(device), | |
244 | tprops); | |
245 | if (ret) | |
246 | goto err; | |
247 | device->pkey_tbl_len[port_index] = tprops->pkey_tbl_len; | |
248 | device->gid_tbl_len[port_index] = tprops->gid_tbl_len; | |
249 | } | |
250 | ||
251 | ret = 0; | |
252 | goto out; | |
253 | ||
254 | err: | |
255 | kfree(device->gid_tbl_len); | |
256 | kfree(device->pkey_tbl_len); | |
257 | out: | |
258 | kfree(tprops); | |
259 | return ret; | |
260 | } | |
261 | ||
1da177e4 LT |
262 | /** |
263 | * ib_register_device - Register an IB device with IB core | |
264 | * @device:Device to register | |
265 | * | |
266 | * Low-level drivers use ib_register_device() to register their | |
267 | * devices with the IB core. All registered clients will receive a | |
268 | * callback for each device that is added. @device must be allocated | |
269 | * with ib_alloc_device(). | |
270 | */ | |
271 | int ib_register_device(struct ib_device *device) | |
272 | { | |
273 | int ret; | |
274 | ||
95ed644f | 275 | mutex_lock(&device_mutex); |
1da177e4 LT |
276 | |
277 | if (strchr(device->name, '%')) { | |
278 | ret = alloc_name(device->name); | |
279 | if (ret) | |
280 | goto out; | |
281 | } | |
282 | ||
283 | if (ib_device_check_mandatory(device)) { | |
284 | ret = -EINVAL; | |
285 | goto out; | |
286 | } | |
287 | ||
288 | INIT_LIST_HEAD(&device->event_handler_list); | |
289 | INIT_LIST_HEAD(&device->client_data_list); | |
290 | spin_lock_init(&device->event_handler_lock); | |
291 | spin_lock_init(&device->client_data_lock); | |
292 | ||
5eb620c8 YE |
293 | ret = read_port_table_lengths(device); |
294 | if (ret) { | |
295 | printk(KERN_WARNING "Couldn't create table lengths cache for device %s\n", | |
296 | device->name); | |
297 | goto out; | |
298 | } | |
299 | ||
1da177e4 LT |
300 | ret = ib_device_register_sysfs(device); |
301 | if (ret) { | |
302 | printk(KERN_WARNING "Couldn't register device %s with driver model\n", | |
303 | device->name); | |
5eb620c8 YE |
304 | kfree(device->gid_tbl_len); |
305 | kfree(device->pkey_tbl_len); | |
1da177e4 LT |
306 | goto out; |
307 | } | |
308 | ||
309 | list_add_tail(&device->core_list, &device_list); | |
310 | ||
311 | device->reg_state = IB_DEV_REGISTERED; | |
312 | ||
313 | { | |
314 | struct ib_client *client; | |
315 | ||
316 | list_for_each_entry(client, &client_list, list) | |
317 | if (client->add && !add_client_context(device, client)) | |
318 | client->add(device); | |
319 | } | |
320 | ||
321 | out: | |
95ed644f | 322 | mutex_unlock(&device_mutex); |
1da177e4 LT |
323 | return ret; |
324 | } | |
325 | EXPORT_SYMBOL(ib_register_device); | |
326 | ||
327 | /** | |
328 | * ib_unregister_device - Unregister an IB device | |
329 | * @device:Device to unregister | |
330 | * | |
331 | * Unregister an IB device. All clients will receive a remove callback. | |
332 | */ | |
333 | void ib_unregister_device(struct ib_device *device) | |
334 | { | |
335 | struct ib_client *client; | |
336 | struct ib_client_data *context, *tmp; | |
337 | unsigned long flags; | |
338 | ||
95ed644f | 339 | mutex_lock(&device_mutex); |
1da177e4 LT |
340 | |
341 | list_for_each_entry_reverse(client, &client_list, list) | |
342 | if (client->remove) | |
343 | client->remove(device); | |
344 | ||
345 | list_del(&device->core_list); | |
346 | ||
5eb620c8 YE |
347 | kfree(device->gid_tbl_len); |
348 | kfree(device->pkey_tbl_len); | |
349 | ||
95ed644f | 350 | mutex_unlock(&device_mutex); |
1da177e4 LT |
351 | |
352 | spin_lock_irqsave(&device->client_data_lock, flags); | |
353 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
354 | kfree(context); | |
355 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
356 | ||
357 | device->reg_state = IB_DEV_UNREGISTERED; | |
358 | } | |
359 | EXPORT_SYMBOL(ib_unregister_device); | |
360 | ||
361 | /** | |
362 | * ib_register_client - Register an IB client | |
363 | * @client:Client to register | |
364 | * | |
365 | * Upper level users of the IB drivers can use ib_register_client() to | |
366 | * register callbacks for IB device addition and removal. When an IB | |
367 | * device is added, each registered client's add method will be called | |
368 | * (in the order the clients were registered), and when a device is | |
369 | * removed, each client's remove method will be called (in the reverse | |
370 | * order that clients were registered). In addition, when | |
371 | * ib_register_client() is called, the client will receive an add | |
372 | * callback for all devices already registered. | |
373 | */ | |
374 | int ib_register_client(struct ib_client *client) | |
375 | { | |
376 | struct ib_device *device; | |
377 | ||
95ed644f | 378 | mutex_lock(&device_mutex); |
1da177e4 LT |
379 | |
380 | list_add_tail(&client->list, &client_list); | |
381 | list_for_each_entry(device, &device_list, core_list) | |
382 | if (client->add && !add_client_context(device, client)) | |
383 | client->add(device); | |
384 | ||
95ed644f | 385 | mutex_unlock(&device_mutex); |
1da177e4 LT |
386 | |
387 | return 0; | |
388 | } | |
389 | EXPORT_SYMBOL(ib_register_client); | |
390 | ||
391 | /** | |
392 | * ib_unregister_client - Unregister an IB client | |
393 | * @client:Client to unregister | |
394 | * | |
395 | * Upper level users use ib_unregister_client() to remove their client | |
396 | * registration. When ib_unregister_client() is called, the client | |
397 | * will receive a remove callback for each IB device still registered. | |
398 | */ | |
399 | void ib_unregister_client(struct ib_client *client) | |
400 | { | |
401 | struct ib_client_data *context, *tmp; | |
402 | struct ib_device *device; | |
403 | unsigned long flags; | |
404 | ||
95ed644f | 405 | mutex_lock(&device_mutex); |
1da177e4 LT |
406 | |
407 | list_for_each_entry(device, &device_list, core_list) { | |
408 | if (client->remove) | |
409 | client->remove(device); | |
410 | ||
411 | spin_lock_irqsave(&device->client_data_lock, flags); | |
412 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
413 | if (context->client == client) { | |
414 | list_del(&context->list); | |
415 | kfree(context); | |
416 | } | |
417 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
418 | } | |
419 | list_del(&client->list); | |
420 | ||
95ed644f | 421 | mutex_unlock(&device_mutex); |
1da177e4 LT |
422 | } |
423 | EXPORT_SYMBOL(ib_unregister_client); | |
424 | ||
425 | /** | |
426 | * ib_get_client_data - Get IB client context | |
427 | * @device:Device to get context for | |
428 | * @client:Client to get context for | |
429 | * | |
430 | * ib_get_client_data() returns client context set with | |
431 | * ib_set_client_data(). | |
432 | */ | |
433 | void *ib_get_client_data(struct ib_device *device, struct ib_client *client) | |
434 | { | |
435 | struct ib_client_data *context; | |
436 | void *ret = NULL; | |
437 | unsigned long flags; | |
438 | ||
439 | spin_lock_irqsave(&device->client_data_lock, flags); | |
440 | list_for_each_entry(context, &device->client_data_list, list) | |
441 | if (context->client == client) { | |
442 | ret = context->data; | |
443 | break; | |
444 | } | |
445 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
446 | ||
447 | return ret; | |
448 | } | |
449 | EXPORT_SYMBOL(ib_get_client_data); | |
450 | ||
451 | /** | |
9cd330d3 | 452 | * ib_set_client_data - Set IB client context |
1da177e4 LT |
453 | * @device:Device to set context for |
454 | * @client:Client to set context for | |
455 | * @data:Context to set | |
456 | * | |
457 | * ib_set_client_data() sets client context that can be retrieved with | |
458 | * ib_get_client_data(). | |
459 | */ | |
460 | void ib_set_client_data(struct ib_device *device, struct ib_client *client, | |
461 | void *data) | |
462 | { | |
463 | struct ib_client_data *context; | |
464 | unsigned long flags; | |
465 | ||
466 | spin_lock_irqsave(&device->client_data_lock, flags); | |
467 | list_for_each_entry(context, &device->client_data_list, list) | |
468 | if (context->client == client) { | |
469 | context->data = data; | |
470 | goto out; | |
471 | } | |
472 | ||
473 | printk(KERN_WARNING "No client context found for %s/%s\n", | |
474 | device->name, client->name); | |
475 | ||
476 | out: | |
477 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
478 | } | |
479 | EXPORT_SYMBOL(ib_set_client_data); | |
480 | ||
481 | /** | |
482 | * ib_register_event_handler - Register an IB event handler | |
483 | * @event_handler:Handler to register | |
484 | * | |
485 | * ib_register_event_handler() registers an event handler that will be | |
486 | * called back when asynchronous IB events occur (as defined in | |
487 | * chapter 11 of the InfiniBand Architecture Specification). This | |
488 | * callback may occur in interrupt context. | |
489 | */ | |
490 | int ib_register_event_handler (struct ib_event_handler *event_handler) | |
491 | { | |
492 | unsigned long flags; | |
493 | ||
494 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
495 | list_add_tail(&event_handler->list, | |
496 | &event_handler->device->event_handler_list); | |
497 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
498 | ||
499 | return 0; | |
500 | } | |
501 | EXPORT_SYMBOL(ib_register_event_handler); | |
502 | ||
503 | /** | |
504 | * ib_unregister_event_handler - Unregister an event handler | |
505 | * @event_handler:Handler to unregister | |
506 | * | |
507 | * Unregister an event handler registered with | |
508 | * ib_register_event_handler(). | |
509 | */ | |
510 | int ib_unregister_event_handler(struct ib_event_handler *event_handler) | |
511 | { | |
512 | unsigned long flags; | |
513 | ||
514 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
515 | list_del(&event_handler->list); | |
516 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
517 | ||
518 | return 0; | |
519 | } | |
520 | EXPORT_SYMBOL(ib_unregister_event_handler); | |
521 | ||
522 | /** | |
523 | * ib_dispatch_event - Dispatch an asynchronous event | |
524 | * @event:Event to dispatch | |
525 | * | |
526 | * Low-level drivers must call ib_dispatch_event() to dispatch the | |
527 | * event to all registered event handlers when an asynchronous event | |
528 | * occurs. | |
529 | */ | |
530 | void ib_dispatch_event(struct ib_event *event) | |
531 | { | |
532 | unsigned long flags; | |
533 | struct ib_event_handler *handler; | |
534 | ||
535 | spin_lock_irqsave(&event->device->event_handler_lock, flags); | |
536 | ||
537 | list_for_each_entry(handler, &event->device->event_handler_list, list) | |
538 | handler->handler(handler, event); | |
539 | ||
540 | spin_unlock_irqrestore(&event->device->event_handler_lock, flags); | |
541 | } | |
542 | EXPORT_SYMBOL(ib_dispatch_event); | |
543 | ||
544 | /** | |
545 | * ib_query_device - Query IB device attributes | |
546 | * @device:Device to query | |
547 | * @device_attr:Device attributes | |
548 | * | |
549 | * ib_query_device() returns the attributes of a device through the | |
550 | * @device_attr pointer. | |
551 | */ | |
552 | int ib_query_device(struct ib_device *device, | |
553 | struct ib_device_attr *device_attr) | |
554 | { | |
555 | return device->query_device(device, device_attr); | |
556 | } | |
557 | EXPORT_SYMBOL(ib_query_device); | |
558 | ||
559 | /** | |
560 | * ib_query_port - Query IB port attributes | |
561 | * @device:Device to query | |
562 | * @port_num:Port number to query | |
563 | * @port_attr:Port attributes | |
564 | * | |
565 | * ib_query_port() returns the attributes of a port through the | |
566 | * @port_attr pointer. | |
567 | */ | |
568 | int ib_query_port(struct ib_device *device, | |
569 | u8 port_num, | |
570 | struct ib_port_attr *port_attr) | |
571 | { | |
07ebafba | 572 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
116c0074 RD |
573 | if (port_num) |
574 | return -EINVAL; | |
575 | } else if (port_num < 1 || port_num > device->phys_port_cnt) | |
576 | return -EINVAL; | |
577 | ||
1da177e4 LT |
578 | return device->query_port(device, port_num, port_attr); |
579 | } | |
580 | EXPORT_SYMBOL(ib_query_port); | |
581 | ||
582 | /** | |
583 | * ib_query_gid - Get GID table entry | |
584 | * @device:Device to query | |
585 | * @port_num:Port number to query | |
586 | * @index:GID table index to query | |
587 | * @gid:Returned GID | |
588 | * | |
589 | * ib_query_gid() fetches the specified GID table entry. | |
590 | */ | |
591 | int ib_query_gid(struct ib_device *device, | |
592 | u8 port_num, int index, union ib_gid *gid) | |
593 | { | |
594 | return device->query_gid(device, port_num, index, gid); | |
595 | } | |
596 | EXPORT_SYMBOL(ib_query_gid); | |
597 | ||
598 | /** | |
599 | * ib_query_pkey - Get P_Key table entry | |
600 | * @device:Device to query | |
601 | * @port_num:Port number to query | |
602 | * @index:P_Key table index to query | |
603 | * @pkey:Returned P_Key | |
604 | * | |
605 | * ib_query_pkey() fetches the specified P_Key table entry. | |
606 | */ | |
607 | int ib_query_pkey(struct ib_device *device, | |
608 | u8 port_num, u16 index, u16 *pkey) | |
609 | { | |
610 | return device->query_pkey(device, port_num, index, pkey); | |
611 | } | |
612 | EXPORT_SYMBOL(ib_query_pkey); | |
613 | ||
614 | /** | |
615 | * ib_modify_device - Change IB device attributes | |
616 | * @device:Device to modify | |
617 | * @device_modify_mask:Mask of attributes to change | |
618 | * @device_modify:New attribute values | |
619 | * | |
620 | * ib_modify_device() changes a device's attributes as specified by | |
621 | * the @device_modify_mask and @device_modify structure. | |
622 | */ | |
623 | int ib_modify_device(struct ib_device *device, | |
624 | int device_modify_mask, | |
625 | struct ib_device_modify *device_modify) | |
626 | { | |
627 | return device->modify_device(device, device_modify_mask, | |
628 | device_modify); | |
629 | } | |
630 | EXPORT_SYMBOL(ib_modify_device); | |
631 | ||
632 | /** | |
633 | * ib_modify_port - Modifies the attributes for the specified port. | |
634 | * @device: The device to modify. | |
635 | * @port_num: The number of the port to modify. | |
636 | * @port_modify_mask: Mask used to specify which attributes of the port | |
637 | * to change. | |
638 | * @port_modify: New attribute values for the port. | |
639 | * | |
640 | * ib_modify_port() changes a port's attributes as specified by the | |
641 | * @port_modify_mask and @port_modify structure. | |
642 | */ | |
643 | int ib_modify_port(struct ib_device *device, | |
644 | u8 port_num, int port_modify_mask, | |
645 | struct ib_port_modify *port_modify) | |
646 | { | |
07ebafba | 647 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
116c0074 RD |
648 | if (port_num) |
649 | return -EINVAL; | |
650 | } else if (port_num < 1 || port_num > device->phys_port_cnt) | |
651 | return -EINVAL; | |
652 | ||
1da177e4 LT |
653 | return device->modify_port(device, port_num, port_modify_mask, |
654 | port_modify); | |
655 | } | |
656 | EXPORT_SYMBOL(ib_modify_port); | |
657 | ||
5eb620c8 YE |
658 | /** |
659 | * ib_find_gid - Returns the port number and GID table index where | |
660 | * a specified GID value occurs. | |
661 | * @device: The device to query. | |
662 | * @gid: The GID value to search for. | |
663 | * @port_num: The port number of the device where the GID value was found. | |
664 | * @index: The index into the GID table where the GID was found. This | |
665 | * parameter may be NULL. | |
666 | */ | |
667 | int ib_find_gid(struct ib_device *device, union ib_gid *gid, | |
668 | u8 *port_num, u16 *index) | |
669 | { | |
670 | union ib_gid tmp_gid; | |
671 | int ret, port, i; | |
672 | ||
673 | for (port = start_port(device); port <= end_port(device); ++port) { | |
674 | for (i = 0; i < device->gid_tbl_len[port - start_port(device)]; ++i) { | |
675 | ret = ib_query_gid(device, port, i, &tmp_gid); | |
676 | if (ret) | |
677 | return ret; | |
678 | if (!memcmp(&tmp_gid, gid, sizeof *gid)) { | |
679 | *port_num = port; | |
680 | if (index) | |
681 | *index = i; | |
682 | return 0; | |
683 | } | |
684 | } | |
685 | } | |
686 | ||
687 | return -ENOENT; | |
688 | } | |
689 | EXPORT_SYMBOL(ib_find_gid); | |
690 | ||
691 | /** | |
692 | * ib_find_pkey - Returns the PKey table index where a specified | |
693 | * PKey value occurs. | |
694 | * @device: The device to query. | |
695 | * @port_num: The port number of the device to search for the PKey. | |
696 | * @pkey: The PKey value to search for. | |
697 | * @index: The index into the PKey table where the PKey was found. | |
698 | */ | |
699 | int ib_find_pkey(struct ib_device *device, | |
700 | u8 port_num, u16 pkey, u16 *index) | |
701 | { | |
702 | int ret, i; | |
703 | u16 tmp_pkey; | |
704 | ||
705 | for (i = 0; i < device->pkey_tbl_len[port_num - start_port(device)]; ++i) { | |
706 | ret = ib_query_pkey(device, port_num, i, &tmp_pkey); | |
707 | if (ret) | |
708 | return ret; | |
709 | ||
710 | if (pkey == tmp_pkey) { | |
711 | *index = i; | |
712 | return 0; | |
713 | } | |
714 | } | |
715 | ||
716 | return -ENOENT; | |
717 | } | |
718 | EXPORT_SYMBOL(ib_find_pkey); | |
719 | ||
1da177e4 LT |
720 | static int __init ib_core_init(void) |
721 | { | |
722 | int ret; | |
723 | ||
724 | ret = ib_sysfs_setup(); | |
725 | if (ret) | |
726 | printk(KERN_WARNING "Couldn't create InfiniBand device class\n"); | |
727 | ||
728 | ret = ib_cache_setup(); | |
729 | if (ret) { | |
730 | printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n"); | |
731 | ib_sysfs_cleanup(); | |
732 | } | |
733 | ||
734 | return ret; | |
735 | } | |
736 | ||
737 | static void __exit ib_core_cleanup(void) | |
738 | { | |
739 | ib_cache_cleanup(); | |
740 | ib_sysfs_cleanup(); | |
f7c6a7b5 RD |
741 | /* Make sure that any pending umem accounting work is done. */ |
742 | flush_scheduled_work(); | |
1da177e4 LT |
743 | } |
744 | ||
745 | module_init(ib_core_init); | |
746 | module_exit(ib_core_cleanup); |