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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. | |
1da177e4 LT |
32 | */ |
33 | ||
34 | #include <linux/module.h> | |
35 | #include <linux/string.h> | |
36 | #include <linux/errno.h> | |
9a6b090c | 37 | #include <linux/kernel.h> |
1da177e4 LT |
38 | #include <linux/slab.h> |
39 | #include <linux/init.h> | |
95ed644f | 40 | #include <linux/mutex.h> |
b2cbae2c | 41 | #include <rdma/rdma_netlink.h> |
1da177e4 LT |
42 | |
43 | #include "core_priv.h" | |
44 | ||
45 | MODULE_AUTHOR("Roland Dreier"); | |
46 | MODULE_DESCRIPTION("core kernel InfiniBand API"); | |
47 | MODULE_LICENSE("Dual BSD/GPL"); | |
48 | ||
49 | struct ib_client_data { | |
50 | struct list_head list; | |
51 | struct ib_client *client; | |
52 | void * data; | |
53 | }; | |
54 | ||
f0626710 TH |
55 | struct workqueue_struct *ib_wq; |
56 | EXPORT_SYMBOL_GPL(ib_wq); | |
57 | ||
1da177e4 LT |
58 | static LIST_HEAD(device_list); |
59 | static LIST_HEAD(client_list); | |
60 | ||
61 | /* | |
95ed644f | 62 | * device_mutex protects access to both device_list and client_list. |
1da177e4 LT |
63 | * There's no real point to using multiple locks or something fancier |
64 | * like an rwsem: we always access both lists, and we're always | |
65 | * modifying one list or the other list. In any case this is not a | |
66 | * hot path so there's no point in trying to optimize. | |
67 | */ | |
95ed644f | 68 | static DEFINE_MUTEX(device_mutex); |
1da177e4 LT |
69 | |
70 | static int ib_device_check_mandatory(struct ib_device *device) | |
71 | { | |
72 | #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } | |
73 | static const struct { | |
74 | size_t offset; | |
75 | char *name; | |
76 | } mandatory_table[] = { | |
77 | IB_MANDATORY_FUNC(query_device), | |
78 | IB_MANDATORY_FUNC(query_port), | |
79 | IB_MANDATORY_FUNC(query_pkey), | |
80 | IB_MANDATORY_FUNC(query_gid), | |
81 | IB_MANDATORY_FUNC(alloc_pd), | |
82 | IB_MANDATORY_FUNC(dealloc_pd), | |
83 | IB_MANDATORY_FUNC(create_ah), | |
84 | IB_MANDATORY_FUNC(destroy_ah), | |
85 | IB_MANDATORY_FUNC(create_qp), | |
86 | IB_MANDATORY_FUNC(modify_qp), | |
87 | IB_MANDATORY_FUNC(destroy_qp), | |
88 | IB_MANDATORY_FUNC(post_send), | |
89 | IB_MANDATORY_FUNC(post_recv), | |
90 | IB_MANDATORY_FUNC(create_cq), | |
91 | IB_MANDATORY_FUNC(destroy_cq), | |
92 | IB_MANDATORY_FUNC(poll_cq), | |
93 | IB_MANDATORY_FUNC(req_notify_cq), | |
94 | IB_MANDATORY_FUNC(get_dma_mr), | |
95 | IB_MANDATORY_FUNC(dereg_mr) | |
96 | }; | |
97 | int i; | |
98 | ||
9a6b090c | 99 | for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { |
1da177e4 LT |
100 | if (!*(void **) ((void *) device + mandatory_table[i].offset)) { |
101 | printk(KERN_WARNING "Device %s is missing mandatory function %s\n", | |
102 | device->name, mandatory_table[i].name); | |
103 | return -EINVAL; | |
104 | } | |
105 | } | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | static struct ib_device *__ib_device_get_by_name(const char *name) | |
111 | { | |
112 | struct ib_device *device; | |
113 | ||
114 | list_for_each_entry(device, &device_list, core_list) | |
115 | if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) | |
116 | return device; | |
117 | ||
118 | return NULL; | |
119 | } | |
120 | ||
121 | ||
122 | static int alloc_name(char *name) | |
123 | { | |
65d470b3 | 124 | unsigned long *inuse; |
1da177e4 LT |
125 | char buf[IB_DEVICE_NAME_MAX]; |
126 | struct ib_device *device; | |
127 | int i; | |
128 | ||
65d470b3 | 129 | inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
130 | if (!inuse) |
131 | return -ENOMEM; | |
132 | ||
133 | list_for_each_entry(device, &device_list, core_list) { | |
134 | if (!sscanf(device->name, name, &i)) | |
135 | continue; | |
136 | if (i < 0 || i >= PAGE_SIZE * 8) | |
137 | continue; | |
138 | snprintf(buf, sizeof buf, name, i); | |
139 | if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) | |
140 | set_bit(i, inuse); | |
141 | } | |
142 | ||
143 | i = find_first_zero_bit(inuse, PAGE_SIZE * 8); | |
144 | free_page((unsigned long) inuse); | |
145 | snprintf(buf, sizeof buf, name, i); | |
146 | ||
147 | if (__ib_device_get_by_name(buf)) | |
148 | return -ENFILE; | |
149 | ||
150 | strlcpy(name, buf, IB_DEVICE_NAME_MAX); | |
151 | return 0; | |
152 | } | |
153 | ||
5eb620c8 YE |
154 | static int start_port(struct ib_device *device) |
155 | { | |
156 | return (device->node_type == RDMA_NODE_IB_SWITCH) ? 0 : 1; | |
157 | } | |
158 | ||
159 | ||
160 | static int end_port(struct ib_device *device) | |
161 | { | |
162 | return (device->node_type == RDMA_NODE_IB_SWITCH) ? | |
163 | 0 : device->phys_port_cnt; | |
164 | } | |
165 | ||
1da177e4 LT |
166 | /** |
167 | * ib_alloc_device - allocate an IB device struct | |
168 | * @size:size of structure to allocate | |
169 | * | |
170 | * Low-level drivers should use ib_alloc_device() to allocate &struct | |
171 | * ib_device. @size is the size of the structure to be allocated, | |
172 | * including any private data used by the low-level driver. | |
173 | * ib_dealloc_device() must be used to free structures allocated with | |
174 | * ib_alloc_device(). | |
175 | */ | |
176 | struct ib_device *ib_alloc_device(size_t size) | |
177 | { | |
1da177e4 LT |
178 | BUG_ON(size < sizeof (struct ib_device)); |
179 | ||
de6eb66b | 180 | return kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
181 | } |
182 | EXPORT_SYMBOL(ib_alloc_device); | |
183 | ||
184 | /** | |
185 | * ib_dealloc_device - free an IB device struct | |
186 | * @device:structure to free | |
187 | * | |
188 | * Free a structure allocated with ib_alloc_device(). | |
189 | */ | |
190 | void ib_dealloc_device(struct ib_device *device) | |
191 | { | |
192 | if (device->reg_state == IB_DEV_UNINITIALIZED) { | |
193 | kfree(device); | |
194 | return; | |
195 | } | |
196 | ||
197 | BUG_ON(device->reg_state != IB_DEV_UNREGISTERED); | |
198 | ||
9206dff1 | 199 | kobject_put(&device->dev.kobj); |
1da177e4 LT |
200 | } |
201 | EXPORT_SYMBOL(ib_dealloc_device); | |
202 | ||
203 | static int add_client_context(struct ib_device *device, struct ib_client *client) | |
204 | { | |
205 | struct ib_client_data *context; | |
206 | unsigned long flags; | |
207 | ||
208 | context = kmalloc(sizeof *context, GFP_KERNEL); | |
209 | if (!context) { | |
210 | printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n", | |
211 | device->name, client->name); | |
212 | return -ENOMEM; | |
213 | } | |
214 | ||
215 | context->client = client; | |
216 | context->data = NULL; | |
217 | ||
218 | spin_lock_irqsave(&device->client_data_lock, flags); | |
219 | list_add(&context->list, &device->client_data_list); | |
220 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
5eb620c8 YE |
225 | static int read_port_table_lengths(struct ib_device *device) |
226 | { | |
227 | struct ib_port_attr *tprops = NULL; | |
228 | int num_ports, ret = -ENOMEM; | |
229 | u8 port_index; | |
230 | ||
231 | tprops = kmalloc(sizeof *tprops, GFP_KERNEL); | |
232 | if (!tprops) | |
233 | goto out; | |
234 | ||
235 | num_ports = end_port(device) - start_port(device) + 1; | |
236 | ||
237 | device->pkey_tbl_len = kmalloc(sizeof *device->pkey_tbl_len * num_ports, | |
238 | GFP_KERNEL); | |
239 | device->gid_tbl_len = kmalloc(sizeof *device->gid_tbl_len * num_ports, | |
240 | GFP_KERNEL); | |
241 | if (!device->pkey_tbl_len || !device->gid_tbl_len) | |
242 | goto err; | |
243 | ||
244 | for (port_index = 0; port_index < num_ports; ++port_index) { | |
245 | ret = ib_query_port(device, port_index + start_port(device), | |
246 | tprops); | |
247 | if (ret) | |
248 | goto err; | |
249 | device->pkey_tbl_len[port_index] = tprops->pkey_tbl_len; | |
250 | device->gid_tbl_len[port_index] = tprops->gid_tbl_len; | |
251 | } | |
252 | ||
253 | ret = 0; | |
254 | goto out; | |
255 | ||
256 | err: | |
257 | kfree(device->gid_tbl_len); | |
258 | kfree(device->pkey_tbl_len); | |
259 | out: | |
260 | kfree(tprops); | |
261 | return ret; | |
262 | } | |
263 | ||
1da177e4 LT |
264 | /** |
265 | * ib_register_device - Register an IB device with IB core | |
266 | * @device:Device to register | |
267 | * | |
268 | * Low-level drivers use ib_register_device() to register their | |
269 | * devices with the IB core. All registered clients will receive a | |
270 | * callback for each device that is added. @device must be allocated | |
271 | * with ib_alloc_device(). | |
272 | */ | |
9a6edb60 RC |
273 | int ib_register_device(struct ib_device *device, |
274 | int (*port_callback)(struct ib_device *, | |
275 | u8, struct kobject *)) | |
1da177e4 LT |
276 | { |
277 | int ret; | |
278 | ||
95ed644f | 279 | mutex_lock(&device_mutex); |
1da177e4 LT |
280 | |
281 | if (strchr(device->name, '%')) { | |
282 | ret = alloc_name(device->name); | |
283 | if (ret) | |
284 | goto out; | |
285 | } | |
286 | ||
287 | if (ib_device_check_mandatory(device)) { | |
288 | ret = -EINVAL; | |
289 | goto out; | |
290 | } | |
291 | ||
292 | INIT_LIST_HEAD(&device->event_handler_list); | |
293 | INIT_LIST_HEAD(&device->client_data_list); | |
294 | spin_lock_init(&device->event_handler_lock); | |
295 | spin_lock_init(&device->client_data_lock); | |
296 | ||
5eb620c8 YE |
297 | ret = read_port_table_lengths(device); |
298 | if (ret) { | |
299 | printk(KERN_WARNING "Couldn't create table lengths cache for device %s\n", | |
300 | device->name); | |
301 | goto out; | |
302 | } | |
303 | ||
9a6edb60 | 304 | ret = ib_device_register_sysfs(device, port_callback); |
1da177e4 LT |
305 | if (ret) { |
306 | printk(KERN_WARNING "Couldn't register device %s with driver model\n", | |
307 | device->name); | |
5eb620c8 YE |
308 | kfree(device->gid_tbl_len); |
309 | kfree(device->pkey_tbl_len); | |
1da177e4 LT |
310 | goto out; |
311 | } | |
312 | ||
313 | list_add_tail(&device->core_list, &device_list); | |
314 | ||
315 | device->reg_state = IB_DEV_REGISTERED; | |
316 | ||
317 | { | |
318 | struct ib_client *client; | |
319 | ||
320 | list_for_each_entry(client, &client_list, list) | |
321 | if (client->add && !add_client_context(device, client)) | |
322 | client->add(device); | |
323 | } | |
324 | ||
325 | out: | |
95ed644f | 326 | mutex_unlock(&device_mutex); |
1da177e4 LT |
327 | return ret; |
328 | } | |
329 | EXPORT_SYMBOL(ib_register_device); | |
330 | ||
331 | /** | |
332 | * ib_unregister_device - Unregister an IB device | |
333 | * @device:Device to unregister | |
334 | * | |
335 | * Unregister an IB device. All clients will receive a remove callback. | |
336 | */ | |
337 | void ib_unregister_device(struct ib_device *device) | |
338 | { | |
339 | struct ib_client *client; | |
340 | struct ib_client_data *context, *tmp; | |
341 | unsigned long flags; | |
342 | ||
95ed644f | 343 | mutex_lock(&device_mutex); |
1da177e4 LT |
344 | |
345 | list_for_each_entry_reverse(client, &client_list, list) | |
346 | if (client->remove) | |
347 | client->remove(device); | |
348 | ||
349 | list_del(&device->core_list); | |
350 | ||
5eb620c8 YE |
351 | kfree(device->gid_tbl_len); |
352 | kfree(device->pkey_tbl_len); | |
353 | ||
95ed644f | 354 | mutex_unlock(&device_mutex); |
1da177e4 | 355 | |
9206dff1 RD |
356 | ib_device_unregister_sysfs(device); |
357 | ||
1da177e4 LT |
358 | spin_lock_irqsave(&device->client_data_lock, flags); |
359 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
360 | kfree(context); | |
361 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
362 | ||
363 | device->reg_state = IB_DEV_UNREGISTERED; | |
364 | } | |
365 | EXPORT_SYMBOL(ib_unregister_device); | |
366 | ||
367 | /** | |
368 | * ib_register_client - Register an IB client | |
369 | * @client:Client to register | |
370 | * | |
371 | * Upper level users of the IB drivers can use ib_register_client() to | |
372 | * register callbacks for IB device addition and removal. When an IB | |
373 | * device is added, each registered client's add method will be called | |
374 | * (in the order the clients were registered), and when a device is | |
375 | * removed, each client's remove method will be called (in the reverse | |
376 | * order that clients were registered). In addition, when | |
377 | * ib_register_client() is called, the client will receive an add | |
378 | * callback for all devices already registered. | |
379 | */ | |
380 | int ib_register_client(struct ib_client *client) | |
381 | { | |
382 | struct ib_device *device; | |
383 | ||
95ed644f | 384 | mutex_lock(&device_mutex); |
1da177e4 LT |
385 | |
386 | list_add_tail(&client->list, &client_list); | |
387 | list_for_each_entry(device, &device_list, core_list) | |
388 | if (client->add && !add_client_context(device, client)) | |
389 | client->add(device); | |
390 | ||
95ed644f | 391 | mutex_unlock(&device_mutex); |
1da177e4 LT |
392 | |
393 | return 0; | |
394 | } | |
395 | EXPORT_SYMBOL(ib_register_client); | |
396 | ||
397 | /** | |
398 | * ib_unregister_client - Unregister an IB client | |
399 | * @client:Client to unregister | |
400 | * | |
401 | * Upper level users use ib_unregister_client() to remove their client | |
402 | * registration. When ib_unregister_client() is called, the client | |
403 | * will receive a remove callback for each IB device still registered. | |
404 | */ | |
405 | void ib_unregister_client(struct ib_client *client) | |
406 | { | |
407 | struct ib_client_data *context, *tmp; | |
408 | struct ib_device *device; | |
409 | unsigned long flags; | |
410 | ||
95ed644f | 411 | mutex_lock(&device_mutex); |
1da177e4 LT |
412 | |
413 | list_for_each_entry(device, &device_list, core_list) { | |
414 | if (client->remove) | |
415 | client->remove(device); | |
416 | ||
417 | spin_lock_irqsave(&device->client_data_lock, flags); | |
418 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
419 | if (context->client == client) { | |
420 | list_del(&context->list); | |
421 | kfree(context); | |
422 | } | |
423 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
424 | } | |
425 | list_del(&client->list); | |
426 | ||
95ed644f | 427 | mutex_unlock(&device_mutex); |
1da177e4 LT |
428 | } |
429 | EXPORT_SYMBOL(ib_unregister_client); | |
430 | ||
431 | /** | |
432 | * ib_get_client_data - Get IB client context | |
433 | * @device:Device to get context for | |
434 | * @client:Client to get context for | |
435 | * | |
436 | * ib_get_client_data() returns client context set with | |
437 | * ib_set_client_data(). | |
438 | */ | |
439 | void *ib_get_client_data(struct ib_device *device, struct ib_client *client) | |
440 | { | |
441 | struct ib_client_data *context; | |
442 | void *ret = NULL; | |
443 | unsigned long flags; | |
444 | ||
445 | spin_lock_irqsave(&device->client_data_lock, flags); | |
446 | list_for_each_entry(context, &device->client_data_list, list) | |
447 | if (context->client == client) { | |
448 | ret = context->data; | |
449 | break; | |
450 | } | |
451 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
452 | ||
453 | return ret; | |
454 | } | |
455 | EXPORT_SYMBOL(ib_get_client_data); | |
456 | ||
457 | /** | |
9cd330d3 | 458 | * ib_set_client_data - Set IB client context |
1da177e4 LT |
459 | * @device:Device to set context for |
460 | * @client:Client to set context for | |
461 | * @data:Context to set | |
462 | * | |
463 | * ib_set_client_data() sets client context that can be retrieved with | |
464 | * ib_get_client_data(). | |
465 | */ | |
466 | void ib_set_client_data(struct ib_device *device, struct ib_client *client, | |
467 | void *data) | |
468 | { | |
469 | struct ib_client_data *context; | |
470 | unsigned long flags; | |
471 | ||
472 | spin_lock_irqsave(&device->client_data_lock, flags); | |
473 | list_for_each_entry(context, &device->client_data_list, list) | |
474 | if (context->client == client) { | |
475 | context->data = data; | |
476 | goto out; | |
477 | } | |
478 | ||
479 | printk(KERN_WARNING "No client context found for %s/%s\n", | |
480 | device->name, client->name); | |
481 | ||
482 | out: | |
483 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
484 | } | |
485 | EXPORT_SYMBOL(ib_set_client_data); | |
486 | ||
487 | /** | |
488 | * ib_register_event_handler - Register an IB event handler | |
489 | * @event_handler:Handler to register | |
490 | * | |
491 | * ib_register_event_handler() registers an event handler that will be | |
492 | * called back when asynchronous IB events occur (as defined in | |
493 | * chapter 11 of the InfiniBand Architecture Specification). This | |
494 | * callback may occur in interrupt context. | |
495 | */ | |
496 | int ib_register_event_handler (struct ib_event_handler *event_handler) | |
497 | { | |
498 | unsigned long flags; | |
499 | ||
500 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
501 | list_add_tail(&event_handler->list, | |
502 | &event_handler->device->event_handler_list); | |
503 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
504 | ||
505 | return 0; | |
506 | } | |
507 | EXPORT_SYMBOL(ib_register_event_handler); | |
508 | ||
509 | /** | |
510 | * ib_unregister_event_handler - Unregister an event handler | |
511 | * @event_handler:Handler to unregister | |
512 | * | |
513 | * Unregister an event handler registered with | |
514 | * ib_register_event_handler(). | |
515 | */ | |
516 | int ib_unregister_event_handler(struct ib_event_handler *event_handler) | |
517 | { | |
518 | unsigned long flags; | |
519 | ||
520 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
521 | list_del(&event_handler->list); | |
522 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
523 | ||
524 | return 0; | |
525 | } | |
526 | EXPORT_SYMBOL(ib_unregister_event_handler); | |
527 | ||
528 | /** | |
529 | * ib_dispatch_event - Dispatch an asynchronous event | |
530 | * @event:Event to dispatch | |
531 | * | |
532 | * Low-level drivers must call ib_dispatch_event() to dispatch the | |
533 | * event to all registered event handlers when an asynchronous event | |
534 | * occurs. | |
535 | */ | |
536 | void ib_dispatch_event(struct ib_event *event) | |
537 | { | |
538 | unsigned long flags; | |
539 | struct ib_event_handler *handler; | |
540 | ||
541 | spin_lock_irqsave(&event->device->event_handler_lock, flags); | |
542 | ||
543 | list_for_each_entry(handler, &event->device->event_handler_list, list) | |
544 | handler->handler(handler, event); | |
545 | ||
546 | spin_unlock_irqrestore(&event->device->event_handler_lock, flags); | |
547 | } | |
548 | EXPORT_SYMBOL(ib_dispatch_event); | |
549 | ||
550 | /** | |
551 | * ib_query_device - Query IB device attributes | |
552 | * @device:Device to query | |
553 | * @device_attr:Device attributes | |
554 | * | |
555 | * ib_query_device() returns the attributes of a device through the | |
556 | * @device_attr pointer. | |
557 | */ | |
558 | int ib_query_device(struct ib_device *device, | |
559 | struct ib_device_attr *device_attr) | |
560 | { | |
561 | return device->query_device(device, device_attr); | |
562 | } | |
563 | EXPORT_SYMBOL(ib_query_device); | |
564 | ||
565 | /** | |
566 | * ib_query_port - Query IB port attributes | |
567 | * @device:Device to query | |
568 | * @port_num:Port number to query | |
569 | * @port_attr:Port attributes | |
570 | * | |
571 | * ib_query_port() returns the attributes of a port through the | |
572 | * @port_attr pointer. | |
573 | */ | |
574 | int ib_query_port(struct ib_device *device, | |
575 | u8 port_num, | |
576 | struct ib_port_attr *port_attr) | |
577 | { | |
1af4c435 | 578 | if (port_num < start_port(device) || port_num > end_port(device)) |
116c0074 RD |
579 | return -EINVAL; |
580 | ||
1da177e4 LT |
581 | return device->query_port(device, port_num, port_attr); |
582 | } | |
583 | EXPORT_SYMBOL(ib_query_port); | |
584 | ||
585 | /** | |
586 | * ib_query_gid - Get GID table entry | |
587 | * @device:Device to query | |
588 | * @port_num:Port number to query | |
589 | * @index:GID table index to query | |
590 | * @gid:Returned GID | |
591 | * | |
592 | * ib_query_gid() fetches the specified GID table entry. | |
593 | */ | |
594 | int ib_query_gid(struct ib_device *device, | |
595 | u8 port_num, int index, union ib_gid *gid) | |
596 | { | |
597 | return device->query_gid(device, port_num, index, gid); | |
598 | } | |
599 | EXPORT_SYMBOL(ib_query_gid); | |
600 | ||
601 | /** | |
602 | * ib_query_pkey - Get P_Key table entry | |
603 | * @device:Device to query | |
604 | * @port_num:Port number to query | |
605 | * @index:P_Key table index to query | |
606 | * @pkey:Returned P_Key | |
607 | * | |
608 | * ib_query_pkey() fetches the specified P_Key table entry. | |
609 | */ | |
610 | int ib_query_pkey(struct ib_device *device, | |
611 | u8 port_num, u16 index, u16 *pkey) | |
612 | { | |
613 | return device->query_pkey(device, port_num, index, pkey); | |
614 | } | |
615 | EXPORT_SYMBOL(ib_query_pkey); | |
616 | ||
617 | /** | |
618 | * ib_modify_device - Change IB device attributes | |
619 | * @device:Device to modify | |
620 | * @device_modify_mask:Mask of attributes to change | |
621 | * @device_modify:New attribute values | |
622 | * | |
623 | * ib_modify_device() changes a device's attributes as specified by | |
624 | * the @device_modify_mask and @device_modify structure. | |
625 | */ | |
626 | int ib_modify_device(struct ib_device *device, | |
627 | int device_modify_mask, | |
628 | struct ib_device_modify *device_modify) | |
629 | { | |
630 | return device->modify_device(device, device_modify_mask, | |
631 | device_modify); | |
632 | } | |
633 | EXPORT_SYMBOL(ib_modify_device); | |
634 | ||
635 | /** | |
636 | * ib_modify_port - Modifies the attributes for the specified port. | |
637 | * @device: The device to modify. | |
638 | * @port_num: The number of the port to modify. | |
639 | * @port_modify_mask: Mask used to specify which attributes of the port | |
640 | * to change. | |
641 | * @port_modify: New attribute values for the port. | |
642 | * | |
643 | * ib_modify_port() changes a port's attributes as specified by the | |
644 | * @port_modify_mask and @port_modify structure. | |
645 | */ | |
646 | int ib_modify_port(struct ib_device *device, | |
647 | u8 port_num, int port_modify_mask, | |
648 | struct ib_port_modify *port_modify) | |
649 | { | |
1af4c435 | 650 | if (port_num < start_port(device) || port_num > end_port(device)) |
116c0074 RD |
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 | ||
36026ecc | 710 | if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { |
5eb620c8 YE |
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 | ||
f0626710 TH |
724 | ib_wq = alloc_workqueue("infiniband", 0, 0); |
725 | if (!ib_wq) | |
726 | return -ENOMEM; | |
727 | ||
1da177e4 | 728 | ret = ib_sysfs_setup(); |
fd75c789 | 729 | if (ret) { |
1da177e4 | 730 | printk(KERN_WARNING "Couldn't create InfiniBand device class\n"); |
fd75c789 NM |
731 | goto err; |
732 | } | |
1da177e4 | 733 | |
b2cbae2c RD |
734 | ret = ibnl_init(); |
735 | if (ret) { | |
736 | printk(KERN_WARNING "Couldn't init IB netlink interface\n"); | |
737 | goto err_sysfs; | |
738 | } | |
739 | ||
1da177e4 LT |
740 | ret = ib_cache_setup(); |
741 | if (ret) { | |
742 | printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n"); | |
b2cbae2c | 743 | goto err_nl; |
1da177e4 LT |
744 | } |
745 | ||
fd75c789 NM |
746 | return 0; |
747 | ||
b2cbae2c RD |
748 | err_nl: |
749 | ibnl_cleanup(); | |
750 | ||
fd75c789 NM |
751 | err_sysfs: |
752 | ib_sysfs_cleanup(); | |
753 | ||
754 | err: | |
755 | destroy_workqueue(ib_wq); | |
1da177e4 LT |
756 | return ret; |
757 | } | |
758 | ||
759 | static void __exit ib_core_cleanup(void) | |
760 | { | |
761 | ib_cache_cleanup(); | |
b2cbae2c | 762 | ibnl_cleanup(); |
1da177e4 | 763 | ib_sysfs_cleanup(); |
f7c6a7b5 | 764 | /* Make sure that any pending umem accounting work is done. */ |
f0626710 | 765 | destroy_workqueue(ib_wq); |
1da177e4 LT |
766 | } |
767 | ||
768 | module_init(ib_core_init); | |
769 | module_exit(ib_core_cleanup); |