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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 | ||
5aa44bb9 HE |
58 | /* The device_list and client_list contain devices and clients after their |
59 | * registration has completed, and the devices and clients are removed | |
60 | * during unregistration. */ | |
1da177e4 LT |
61 | static LIST_HEAD(device_list); |
62 | static LIST_HEAD(client_list); | |
63 | ||
64 | /* | |
5aa44bb9 HE |
65 | * device_mutex and lists_rwsem protect access to both device_list and |
66 | * client_list. device_mutex protects writer access by device and client | |
67 | * registration / de-registration. lists_rwsem protects reader access to | |
68 | * these lists. Iterators of these lists must lock it for read, while updates | |
69 | * to the lists must be done with a write lock. A special case is when the | |
70 | * device_mutex is locked. In this case locking the lists for read access is | |
71 | * not necessary as the device_mutex implies it. | |
1da177e4 | 72 | */ |
95ed644f | 73 | static DEFINE_MUTEX(device_mutex); |
5aa44bb9 HE |
74 | static DECLARE_RWSEM(lists_rwsem); |
75 | ||
1da177e4 LT |
76 | |
77 | static int ib_device_check_mandatory(struct ib_device *device) | |
78 | { | |
79 | #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } | |
80 | static const struct { | |
81 | size_t offset; | |
82 | char *name; | |
83 | } mandatory_table[] = { | |
84 | IB_MANDATORY_FUNC(query_device), | |
85 | IB_MANDATORY_FUNC(query_port), | |
86 | IB_MANDATORY_FUNC(query_pkey), | |
87 | IB_MANDATORY_FUNC(query_gid), | |
88 | IB_MANDATORY_FUNC(alloc_pd), | |
89 | IB_MANDATORY_FUNC(dealloc_pd), | |
90 | IB_MANDATORY_FUNC(create_ah), | |
91 | IB_MANDATORY_FUNC(destroy_ah), | |
92 | IB_MANDATORY_FUNC(create_qp), | |
93 | IB_MANDATORY_FUNC(modify_qp), | |
94 | IB_MANDATORY_FUNC(destroy_qp), | |
95 | IB_MANDATORY_FUNC(post_send), | |
96 | IB_MANDATORY_FUNC(post_recv), | |
97 | IB_MANDATORY_FUNC(create_cq), | |
98 | IB_MANDATORY_FUNC(destroy_cq), | |
99 | IB_MANDATORY_FUNC(poll_cq), | |
100 | IB_MANDATORY_FUNC(req_notify_cq), | |
101 | IB_MANDATORY_FUNC(get_dma_mr), | |
7738613e IW |
102 | IB_MANDATORY_FUNC(dereg_mr), |
103 | IB_MANDATORY_FUNC(get_port_immutable) | |
1da177e4 LT |
104 | }; |
105 | int i; | |
106 | ||
9a6b090c | 107 | for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { |
1da177e4 LT |
108 | if (!*(void **) ((void *) device + mandatory_table[i].offset)) { |
109 | printk(KERN_WARNING "Device %s is missing mandatory function %s\n", | |
110 | device->name, mandatory_table[i].name); | |
111 | return -EINVAL; | |
112 | } | |
113 | } | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | static struct ib_device *__ib_device_get_by_name(const char *name) | |
119 | { | |
120 | struct ib_device *device; | |
121 | ||
122 | list_for_each_entry(device, &device_list, core_list) | |
123 | if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) | |
124 | return device; | |
125 | ||
126 | return NULL; | |
127 | } | |
128 | ||
129 | ||
130 | static int alloc_name(char *name) | |
131 | { | |
65d470b3 | 132 | unsigned long *inuse; |
1da177e4 LT |
133 | char buf[IB_DEVICE_NAME_MAX]; |
134 | struct ib_device *device; | |
135 | int i; | |
136 | ||
65d470b3 | 137 | inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
138 | if (!inuse) |
139 | return -ENOMEM; | |
140 | ||
141 | list_for_each_entry(device, &device_list, core_list) { | |
142 | if (!sscanf(device->name, name, &i)) | |
143 | continue; | |
144 | if (i < 0 || i >= PAGE_SIZE * 8) | |
145 | continue; | |
146 | snprintf(buf, sizeof buf, name, i); | |
147 | if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) | |
148 | set_bit(i, inuse); | |
149 | } | |
150 | ||
151 | i = find_first_zero_bit(inuse, PAGE_SIZE * 8); | |
152 | free_page((unsigned long) inuse); | |
153 | snprintf(buf, sizeof buf, name, i); | |
154 | ||
155 | if (__ib_device_get_by_name(buf)) | |
156 | return -ENFILE; | |
157 | ||
158 | strlcpy(name, buf, IB_DEVICE_NAME_MAX); | |
159 | return 0; | |
160 | } | |
161 | ||
162 | /** | |
163 | * ib_alloc_device - allocate an IB device struct | |
164 | * @size:size of structure to allocate | |
165 | * | |
166 | * Low-level drivers should use ib_alloc_device() to allocate &struct | |
167 | * ib_device. @size is the size of the structure to be allocated, | |
168 | * including any private data used by the low-level driver. | |
169 | * ib_dealloc_device() must be used to free structures allocated with | |
170 | * ib_alloc_device(). | |
171 | */ | |
172 | struct ib_device *ib_alloc_device(size_t size) | |
173 | { | |
1da177e4 LT |
174 | BUG_ON(size < sizeof (struct ib_device)); |
175 | ||
de6eb66b | 176 | return kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
177 | } |
178 | EXPORT_SYMBOL(ib_alloc_device); | |
179 | ||
180 | /** | |
181 | * ib_dealloc_device - free an IB device struct | |
182 | * @device:structure to free | |
183 | * | |
184 | * Free a structure allocated with ib_alloc_device(). | |
185 | */ | |
186 | void ib_dealloc_device(struct ib_device *device) | |
187 | { | |
188 | if (device->reg_state == IB_DEV_UNINITIALIZED) { | |
189 | kfree(device); | |
190 | return; | |
191 | } | |
192 | ||
193 | BUG_ON(device->reg_state != IB_DEV_UNREGISTERED); | |
194 | ||
9206dff1 | 195 | kobject_put(&device->dev.kobj); |
1da177e4 LT |
196 | } |
197 | EXPORT_SYMBOL(ib_dealloc_device); | |
198 | ||
199 | static int add_client_context(struct ib_device *device, struct ib_client *client) | |
200 | { | |
201 | struct ib_client_data *context; | |
202 | unsigned long flags; | |
203 | ||
204 | context = kmalloc(sizeof *context, GFP_KERNEL); | |
205 | if (!context) { | |
206 | printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n", | |
207 | device->name, client->name); | |
208 | return -ENOMEM; | |
209 | } | |
210 | ||
211 | context->client = client; | |
212 | context->data = NULL; | |
213 | ||
214 | spin_lock_irqsave(&device->client_data_lock, flags); | |
215 | list_add(&context->list, &device->client_data_list); | |
216 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
337877a4 IW |
221 | static int verify_immutable(const struct ib_device *dev, u8 port) |
222 | { | |
223 | return WARN_ON(!rdma_cap_ib_mad(dev, port) && | |
224 | rdma_max_mad_size(dev, port) != 0); | |
225 | } | |
226 | ||
7738613e | 227 | static int read_port_immutable(struct ib_device *device) |
5eb620c8 | 228 | { |
7738613e IW |
229 | int ret = -ENOMEM; |
230 | u8 start_port = rdma_start_port(device); | |
231 | u8 end_port = rdma_end_port(device); | |
232 | u8 port; | |
233 | ||
234 | /** | |
235 | * device->port_immutable is indexed directly by the port number to make | |
236 | * access to this data as efficient as possible. | |
237 | * | |
238 | * Therefore port_immutable is declared as a 1 based array with | |
239 | * potential empty slots at the beginning. | |
240 | */ | |
241 | device->port_immutable = kzalloc(sizeof(*device->port_immutable) | |
242 | * (end_port + 1), | |
243 | GFP_KERNEL); | |
244 | if (!device->port_immutable) | |
5eb620c8 YE |
245 | goto err; |
246 | ||
7738613e IW |
247 | for (port = start_port; port <= end_port; ++port) { |
248 | ret = device->get_port_immutable(device, port, | |
249 | &device->port_immutable[port]); | |
5eb620c8 YE |
250 | if (ret) |
251 | goto err; | |
337877a4 IW |
252 | |
253 | if (verify_immutable(device, port)) { | |
254 | ret = -EINVAL; | |
255 | goto err; | |
256 | } | |
5eb620c8 YE |
257 | } |
258 | ||
259 | ret = 0; | |
260 | goto out; | |
5eb620c8 | 261 | err: |
7738613e | 262 | kfree(device->port_immutable); |
5eb620c8 | 263 | out: |
5eb620c8 YE |
264 | return ret; |
265 | } | |
266 | ||
1da177e4 LT |
267 | /** |
268 | * ib_register_device - Register an IB device with IB core | |
269 | * @device:Device to register | |
270 | * | |
271 | * Low-level drivers use ib_register_device() to register their | |
272 | * devices with the IB core. All registered clients will receive a | |
273 | * callback for each device that is added. @device must be allocated | |
274 | * with ib_alloc_device(). | |
275 | */ | |
9a6edb60 RC |
276 | int ib_register_device(struct ib_device *device, |
277 | int (*port_callback)(struct ib_device *, | |
278 | u8, struct kobject *)) | |
1da177e4 LT |
279 | { |
280 | int ret; | |
281 | ||
95ed644f | 282 | mutex_lock(&device_mutex); |
1da177e4 LT |
283 | |
284 | if (strchr(device->name, '%')) { | |
285 | ret = alloc_name(device->name); | |
286 | if (ret) | |
287 | goto out; | |
288 | } | |
289 | ||
290 | if (ib_device_check_mandatory(device)) { | |
291 | ret = -EINVAL; | |
292 | goto out; | |
293 | } | |
294 | ||
295 | INIT_LIST_HEAD(&device->event_handler_list); | |
296 | INIT_LIST_HEAD(&device->client_data_list); | |
297 | spin_lock_init(&device->event_handler_lock); | |
298 | spin_lock_init(&device->client_data_lock); | |
299 | ||
7738613e | 300 | ret = read_port_immutable(device); |
5eb620c8 | 301 | if (ret) { |
7738613e | 302 | printk(KERN_WARNING "Couldn't create per port immutable data %s\n", |
5eb620c8 YE |
303 | device->name); |
304 | goto out; | |
305 | } | |
306 | ||
9a6edb60 | 307 | ret = ib_device_register_sysfs(device, port_callback); |
1da177e4 LT |
308 | if (ret) { |
309 | printk(KERN_WARNING "Couldn't register device %s with driver model\n", | |
310 | device->name); | |
7738613e | 311 | kfree(device->port_immutable); |
1da177e4 LT |
312 | goto out; |
313 | } | |
314 | ||
1da177e4 LT |
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 | ||
5aa44bb9 HE |
325 | down_write(&lists_rwsem); |
326 | list_add_tail(&device->core_list, &device_list); | |
327 | up_write(&lists_rwsem); | |
328 | out: | |
95ed644f | 329 | mutex_unlock(&device_mutex); |
1da177e4 LT |
330 | return ret; |
331 | } | |
332 | EXPORT_SYMBOL(ib_register_device); | |
333 | ||
334 | /** | |
335 | * ib_unregister_device - Unregister an IB device | |
336 | * @device:Device to unregister | |
337 | * | |
338 | * Unregister an IB device. All clients will receive a remove callback. | |
339 | */ | |
340 | void ib_unregister_device(struct ib_device *device) | |
341 | { | |
342 | struct ib_client *client; | |
343 | struct ib_client_data *context, *tmp; | |
344 | unsigned long flags; | |
345 | ||
95ed644f | 346 | mutex_lock(&device_mutex); |
1da177e4 | 347 | |
5aa44bb9 HE |
348 | down_write(&lists_rwsem); |
349 | list_del(&device->core_list); | |
350 | up_write(&lists_rwsem); | |
351 | ||
1da177e4 LT |
352 | list_for_each_entry_reverse(client, &client_list, list) |
353 | if (client->remove) | |
354 | client->remove(device); | |
355 | ||
95ed644f | 356 | mutex_unlock(&device_mutex); |
1da177e4 | 357 | |
9206dff1 RD |
358 | ib_device_unregister_sysfs(device); |
359 | ||
1da177e4 LT |
360 | spin_lock_irqsave(&device->client_data_lock, flags); |
361 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
362 | kfree(context); | |
363 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
364 | ||
365 | device->reg_state = IB_DEV_UNREGISTERED; | |
366 | } | |
367 | EXPORT_SYMBOL(ib_unregister_device); | |
368 | ||
369 | /** | |
370 | * ib_register_client - Register an IB client | |
371 | * @client:Client to register | |
372 | * | |
373 | * Upper level users of the IB drivers can use ib_register_client() to | |
374 | * register callbacks for IB device addition and removal. When an IB | |
375 | * device is added, each registered client's add method will be called | |
376 | * (in the order the clients were registered), and when a device is | |
377 | * removed, each client's remove method will be called (in the reverse | |
378 | * order that clients were registered). In addition, when | |
379 | * ib_register_client() is called, the client will receive an add | |
380 | * callback for all devices already registered. | |
381 | */ | |
382 | int ib_register_client(struct ib_client *client) | |
383 | { | |
384 | struct ib_device *device; | |
385 | ||
95ed644f | 386 | mutex_lock(&device_mutex); |
1da177e4 | 387 | |
1da177e4 LT |
388 | list_for_each_entry(device, &device_list, core_list) |
389 | if (client->add && !add_client_context(device, client)) | |
390 | client->add(device); | |
391 | ||
5aa44bb9 HE |
392 | down_write(&lists_rwsem); |
393 | list_add_tail(&client->list, &client_list); | |
394 | up_write(&lists_rwsem); | |
395 | ||
95ed644f | 396 | mutex_unlock(&device_mutex); |
1da177e4 LT |
397 | |
398 | return 0; | |
399 | } | |
400 | EXPORT_SYMBOL(ib_register_client); | |
401 | ||
402 | /** | |
403 | * ib_unregister_client - Unregister an IB client | |
404 | * @client:Client to unregister | |
405 | * | |
406 | * Upper level users use ib_unregister_client() to remove their client | |
407 | * registration. When ib_unregister_client() is called, the client | |
408 | * will receive a remove callback for each IB device still registered. | |
409 | */ | |
410 | void ib_unregister_client(struct ib_client *client) | |
411 | { | |
412 | struct ib_client_data *context, *tmp; | |
413 | struct ib_device *device; | |
414 | unsigned long flags; | |
415 | ||
95ed644f | 416 | mutex_lock(&device_mutex); |
1da177e4 | 417 | |
5aa44bb9 HE |
418 | down_write(&lists_rwsem); |
419 | list_del(&client->list); | |
420 | up_write(&lists_rwsem); | |
421 | ||
1da177e4 LT |
422 | list_for_each_entry(device, &device_list, core_list) { |
423 | if (client->remove) | |
424 | client->remove(device); | |
425 | ||
426 | spin_lock_irqsave(&device->client_data_lock, flags); | |
427 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
428 | if (context->client == client) { | |
429 | list_del(&context->list); | |
430 | kfree(context); | |
431 | } | |
432 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
433 | } | |
1da177e4 | 434 | |
95ed644f | 435 | mutex_unlock(&device_mutex); |
1da177e4 LT |
436 | } |
437 | EXPORT_SYMBOL(ib_unregister_client); | |
438 | ||
439 | /** | |
440 | * ib_get_client_data - Get IB client context | |
441 | * @device:Device to get context for | |
442 | * @client:Client to get context for | |
443 | * | |
444 | * ib_get_client_data() returns client context set with | |
445 | * ib_set_client_data(). | |
446 | */ | |
447 | void *ib_get_client_data(struct ib_device *device, struct ib_client *client) | |
448 | { | |
449 | struct ib_client_data *context; | |
450 | void *ret = NULL; | |
451 | unsigned long flags; | |
452 | ||
453 | spin_lock_irqsave(&device->client_data_lock, flags); | |
454 | list_for_each_entry(context, &device->client_data_list, list) | |
455 | if (context->client == client) { | |
456 | ret = context->data; | |
457 | break; | |
458 | } | |
459 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
460 | ||
461 | return ret; | |
462 | } | |
463 | EXPORT_SYMBOL(ib_get_client_data); | |
464 | ||
465 | /** | |
9cd330d3 | 466 | * ib_set_client_data - Set IB client context |
1da177e4 LT |
467 | * @device:Device to set context for |
468 | * @client:Client to set context for | |
469 | * @data:Context to set | |
470 | * | |
471 | * ib_set_client_data() sets client context that can be retrieved with | |
472 | * ib_get_client_data(). | |
473 | */ | |
474 | void ib_set_client_data(struct ib_device *device, struct ib_client *client, | |
475 | void *data) | |
476 | { | |
477 | struct ib_client_data *context; | |
478 | unsigned long flags; | |
479 | ||
480 | spin_lock_irqsave(&device->client_data_lock, flags); | |
481 | list_for_each_entry(context, &device->client_data_list, list) | |
482 | if (context->client == client) { | |
483 | context->data = data; | |
484 | goto out; | |
485 | } | |
486 | ||
487 | printk(KERN_WARNING "No client context found for %s/%s\n", | |
488 | device->name, client->name); | |
489 | ||
490 | out: | |
491 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
492 | } | |
493 | EXPORT_SYMBOL(ib_set_client_data); | |
494 | ||
495 | /** | |
496 | * ib_register_event_handler - Register an IB event handler | |
497 | * @event_handler:Handler to register | |
498 | * | |
499 | * ib_register_event_handler() registers an event handler that will be | |
500 | * called back when asynchronous IB events occur (as defined in | |
501 | * chapter 11 of the InfiniBand Architecture Specification). This | |
502 | * callback may occur in interrupt context. | |
503 | */ | |
504 | int ib_register_event_handler (struct ib_event_handler *event_handler) | |
505 | { | |
506 | unsigned long flags; | |
507 | ||
508 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
509 | list_add_tail(&event_handler->list, | |
510 | &event_handler->device->event_handler_list); | |
511 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
512 | ||
513 | return 0; | |
514 | } | |
515 | EXPORT_SYMBOL(ib_register_event_handler); | |
516 | ||
517 | /** | |
518 | * ib_unregister_event_handler - Unregister an event handler | |
519 | * @event_handler:Handler to unregister | |
520 | * | |
521 | * Unregister an event handler registered with | |
522 | * ib_register_event_handler(). | |
523 | */ | |
524 | int ib_unregister_event_handler(struct ib_event_handler *event_handler) | |
525 | { | |
526 | unsigned long flags; | |
527 | ||
528 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
529 | list_del(&event_handler->list); | |
530 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
531 | ||
532 | return 0; | |
533 | } | |
534 | EXPORT_SYMBOL(ib_unregister_event_handler); | |
535 | ||
536 | /** | |
537 | * ib_dispatch_event - Dispatch an asynchronous event | |
538 | * @event:Event to dispatch | |
539 | * | |
540 | * Low-level drivers must call ib_dispatch_event() to dispatch the | |
541 | * event to all registered event handlers when an asynchronous event | |
542 | * occurs. | |
543 | */ | |
544 | void ib_dispatch_event(struct ib_event *event) | |
545 | { | |
546 | unsigned long flags; | |
547 | struct ib_event_handler *handler; | |
548 | ||
549 | spin_lock_irqsave(&event->device->event_handler_lock, flags); | |
550 | ||
551 | list_for_each_entry(handler, &event->device->event_handler_list, list) | |
552 | handler->handler(handler, event); | |
553 | ||
554 | spin_unlock_irqrestore(&event->device->event_handler_lock, flags); | |
555 | } | |
556 | EXPORT_SYMBOL(ib_dispatch_event); | |
557 | ||
558 | /** | |
559 | * ib_query_device - Query IB device attributes | |
560 | * @device:Device to query | |
561 | * @device_attr:Device attributes | |
562 | * | |
563 | * ib_query_device() returns the attributes of a device through the | |
564 | * @device_attr pointer. | |
565 | */ | |
566 | int ib_query_device(struct ib_device *device, | |
567 | struct ib_device_attr *device_attr) | |
568 | { | |
2528e33e MB |
569 | struct ib_udata uhw = {.outlen = 0, .inlen = 0}; |
570 | ||
24306dc6 MB |
571 | memset(device_attr, 0, sizeof(*device_attr)); |
572 | ||
2528e33e | 573 | return device->query_device(device, device_attr, &uhw); |
1da177e4 LT |
574 | } |
575 | EXPORT_SYMBOL(ib_query_device); | |
576 | ||
577 | /** | |
578 | * ib_query_port - Query IB port attributes | |
579 | * @device:Device to query | |
580 | * @port_num:Port number to query | |
581 | * @port_attr:Port attributes | |
582 | * | |
583 | * ib_query_port() returns the attributes of a port through the | |
584 | * @port_attr pointer. | |
585 | */ | |
586 | int ib_query_port(struct ib_device *device, | |
587 | u8 port_num, | |
588 | struct ib_port_attr *port_attr) | |
589 | { | |
0cf18d77 | 590 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
116c0074 RD |
591 | return -EINVAL; |
592 | ||
1da177e4 LT |
593 | return device->query_port(device, port_num, port_attr); |
594 | } | |
595 | EXPORT_SYMBOL(ib_query_port); | |
596 | ||
597 | /** | |
598 | * ib_query_gid - Get GID table entry | |
599 | * @device:Device to query | |
600 | * @port_num:Port number to query | |
601 | * @index:GID table index to query | |
602 | * @gid:Returned GID | |
603 | * | |
604 | * ib_query_gid() fetches the specified GID table entry. | |
605 | */ | |
606 | int ib_query_gid(struct ib_device *device, | |
607 | u8 port_num, int index, union ib_gid *gid) | |
608 | { | |
609 | return device->query_gid(device, port_num, index, gid); | |
610 | } | |
611 | EXPORT_SYMBOL(ib_query_gid); | |
612 | ||
613 | /** | |
614 | * ib_query_pkey - Get P_Key table entry | |
615 | * @device:Device to query | |
616 | * @port_num:Port number to query | |
617 | * @index:P_Key table index to query | |
618 | * @pkey:Returned P_Key | |
619 | * | |
620 | * ib_query_pkey() fetches the specified P_Key table entry. | |
621 | */ | |
622 | int ib_query_pkey(struct ib_device *device, | |
623 | u8 port_num, u16 index, u16 *pkey) | |
624 | { | |
625 | return device->query_pkey(device, port_num, index, pkey); | |
626 | } | |
627 | EXPORT_SYMBOL(ib_query_pkey); | |
628 | ||
629 | /** | |
630 | * ib_modify_device - Change IB device attributes | |
631 | * @device:Device to modify | |
632 | * @device_modify_mask:Mask of attributes to change | |
633 | * @device_modify:New attribute values | |
634 | * | |
635 | * ib_modify_device() changes a device's attributes as specified by | |
636 | * the @device_modify_mask and @device_modify structure. | |
637 | */ | |
638 | int ib_modify_device(struct ib_device *device, | |
639 | int device_modify_mask, | |
640 | struct ib_device_modify *device_modify) | |
641 | { | |
10e1b54b BVA |
642 | if (!device->modify_device) |
643 | return -ENOSYS; | |
644 | ||
1da177e4 LT |
645 | return device->modify_device(device, device_modify_mask, |
646 | device_modify); | |
647 | } | |
648 | EXPORT_SYMBOL(ib_modify_device); | |
649 | ||
650 | /** | |
651 | * ib_modify_port - Modifies the attributes for the specified port. | |
652 | * @device: The device to modify. | |
653 | * @port_num: The number of the port to modify. | |
654 | * @port_modify_mask: Mask used to specify which attributes of the port | |
655 | * to change. | |
656 | * @port_modify: New attribute values for the port. | |
657 | * | |
658 | * ib_modify_port() changes a port's attributes as specified by the | |
659 | * @port_modify_mask and @port_modify structure. | |
660 | */ | |
661 | int ib_modify_port(struct ib_device *device, | |
662 | u8 port_num, int port_modify_mask, | |
663 | struct ib_port_modify *port_modify) | |
664 | { | |
10e1b54b BVA |
665 | if (!device->modify_port) |
666 | return -ENOSYS; | |
667 | ||
0cf18d77 | 668 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
116c0074 RD |
669 | return -EINVAL; |
670 | ||
1da177e4 LT |
671 | return device->modify_port(device, port_num, port_modify_mask, |
672 | port_modify); | |
673 | } | |
674 | EXPORT_SYMBOL(ib_modify_port); | |
675 | ||
5eb620c8 YE |
676 | /** |
677 | * ib_find_gid - Returns the port number and GID table index where | |
678 | * a specified GID value occurs. | |
679 | * @device: The device to query. | |
680 | * @gid: The GID value to search for. | |
681 | * @port_num: The port number of the device where the GID value was found. | |
682 | * @index: The index into the GID table where the GID was found. This | |
683 | * parameter may be NULL. | |
684 | */ | |
685 | int ib_find_gid(struct ib_device *device, union ib_gid *gid, | |
686 | u8 *port_num, u16 *index) | |
687 | { | |
688 | union ib_gid tmp_gid; | |
689 | int ret, port, i; | |
690 | ||
0cf18d77 | 691 | for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { |
7738613e | 692 | for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { |
5eb620c8 YE |
693 | ret = ib_query_gid(device, port, i, &tmp_gid); |
694 | if (ret) | |
695 | return ret; | |
696 | if (!memcmp(&tmp_gid, gid, sizeof *gid)) { | |
697 | *port_num = port; | |
698 | if (index) | |
699 | *index = i; | |
700 | return 0; | |
701 | } | |
702 | } | |
703 | } | |
704 | ||
705 | return -ENOENT; | |
706 | } | |
707 | EXPORT_SYMBOL(ib_find_gid); | |
708 | ||
709 | /** | |
710 | * ib_find_pkey - Returns the PKey table index where a specified | |
711 | * PKey value occurs. | |
712 | * @device: The device to query. | |
713 | * @port_num: The port number of the device to search for the PKey. | |
714 | * @pkey: The PKey value to search for. | |
715 | * @index: The index into the PKey table where the PKey was found. | |
716 | */ | |
717 | int ib_find_pkey(struct ib_device *device, | |
718 | u8 port_num, u16 pkey, u16 *index) | |
719 | { | |
720 | int ret, i; | |
721 | u16 tmp_pkey; | |
ff7166c4 | 722 | int partial_ix = -1; |
5eb620c8 | 723 | |
7738613e | 724 | for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { |
5eb620c8 YE |
725 | ret = ib_query_pkey(device, port_num, i, &tmp_pkey); |
726 | if (ret) | |
727 | return ret; | |
36026ecc | 728 | if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { |
ff7166c4 JM |
729 | /* if there is full-member pkey take it.*/ |
730 | if (tmp_pkey & 0x8000) { | |
731 | *index = i; | |
732 | return 0; | |
733 | } | |
734 | if (partial_ix < 0) | |
735 | partial_ix = i; | |
5eb620c8 YE |
736 | } |
737 | } | |
738 | ||
ff7166c4 JM |
739 | /*no full-member, if exists take the limited*/ |
740 | if (partial_ix >= 0) { | |
741 | *index = partial_ix; | |
742 | return 0; | |
743 | } | |
5eb620c8 YE |
744 | return -ENOENT; |
745 | } | |
746 | EXPORT_SYMBOL(ib_find_pkey); | |
747 | ||
1da177e4 LT |
748 | static int __init ib_core_init(void) |
749 | { | |
750 | int ret; | |
751 | ||
f0626710 TH |
752 | ib_wq = alloc_workqueue("infiniband", 0, 0); |
753 | if (!ib_wq) | |
754 | return -ENOMEM; | |
755 | ||
1da177e4 | 756 | ret = ib_sysfs_setup(); |
fd75c789 | 757 | if (ret) { |
1da177e4 | 758 | printk(KERN_WARNING "Couldn't create InfiniBand device class\n"); |
fd75c789 NM |
759 | goto err; |
760 | } | |
1da177e4 | 761 | |
b2cbae2c RD |
762 | ret = ibnl_init(); |
763 | if (ret) { | |
764 | printk(KERN_WARNING "Couldn't init IB netlink interface\n"); | |
765 | goto err_sysfs; | |
766 | } | |
767 | ||
1da177e4 LT |
768 | ret = ib_cache_setup(); |
769 | if (ret) { | |
770 | printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n"); | |
b2cbae2c | 771 | goto err_nl; |
1da177e4 LT |
772 | } |
773 | ||
fd75c789 NM |
774 | return 0; |
775 | ||
b2cbae2c RD |
776 | err_nl: |
777 | ibnl_cleanup(); | |
778 | ||
fd75c789 NM |
779 | err_sysfs: |
780 | ib_sysfs_cleanup(); | |
781 | ||
782 | err: | |
783 | destroy_workqueue(ib_wq); | |
1da177e4 LT |
784 | return ret; |
785 | } | |
786 | ||
787 | static void __exit ib_core_cleanup(void) | |
788 | { | |
789 | ib_cache_cleanup(); | |
b2cbae2c | 790 | ibnl_cleanup(); |
1da177e4 | 791 | ib_sysfs_cleanup(); |
f7c6a7b5 | 792 | /* Make sure that any pending umem accounting work is done. */ |
f0626710 | 793 | destroy_workqueue(ib_wq); |
1da177e4 LT |
794 | } |
795 | ||
796 | module_init(ib_core_init); | |
797 | module_exit(ib_core_cleanup); |