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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; | |
7c1eb45a HE |
53 | /* The device or client is going down. Do not call client or device |
54 | * callbacks other than remove(). */ | |
55 | bool going_down; | |
1da177e4 LT |
56 | }; |
57 | ||
f0626710 TH |
58 | struct workqueue_struct *ib_wq; |
59 | EXPORT_SYMBOL_GPL(ib_wq); | |
60 | ||
5aa44bb9 HE |
61 | /* The device_list and client_list contain devices and clients after their |
62 | * registration has completed, and the devices and clients are removed | |
63 | * during unregistration. */ | |
1da177e4 LT |
64 | static LIST_HEAD(device_list); |
65 | static LIST_HEAD(client_list); | |
66 | ||
67 | /* | |
5aa44bb9 HE |
68 | * device_mutex and lists_rwsem protect access to both device_list and |
69 | * client_list. device_mutex protects writer access by device and client | |
70 | * registration / de-registration. lists_rwsem protects reader access to | |
71 | * these lists. Iterators of these lists must lock it for read, while updates | |
72 | * to the lists must be done with a write lock. A special case is when the | |
73 | * device_mutex is locked. In this case locking the lists for read access is | |
74 | * not necessary as the device_mutex implies it. | |
7c1eb45a HE |
75 | * |
76 | * lists_rwsem also protects access to the client data list. | |
1da177e4 | 77 | */ |
95ed644f | 78 | static DEFINE_MUTEX(device_mutex); |
5aa44bb9 HE |
79 | static DECLARE_RWSEM(lists_rwsem); |
80 | ||
1da177e4 LT |
81 | |
82 | static int ib_device_check_mandatory(struct ib_device *device) | |
83 | { | |
84 | #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } | |
85 | static const struct { | |
86 | size_t offset; | |
87 | char *name; | |
88 | } mandatory_table[] = { | |
89 | IB_MANDATORY_FUNC(query_device), | |
90 | IB_MANDATORY_FUNC(query_port), | |
91 | IB_MANDATORY_FUNC(query_pkey), | |
92 | IB_MANDATORY_FUNC(query_gid), | |
93 | IB_MANDATORY_FUNC(alloc_pd), | |
94 | IB_MANDATORY_FUNC(dealloc_pd), | |
95 | IB_MANDATORY_FUNC(create_ah), | |
96 | IB_MANDATORY_FUNC(destroy_ah), | |
97 | IB_MANDATORY_FUNC(create_qp), | |
98 | IB_MANDATORY_FUNC(modify_qp), | |
99 | IB_MANDATORY_FUNC(destroy_qp), | |
100 | IB_MANDATORY_FUNC(post_send), | |
101 | IB_MANDATORY_FUNC(post_recv), | |
102 | IB_MANDATORY_FUNC(create_cq), | |
103 | IB_MANDATORY_FUNC(destroy_cq), | |
104 | IB_MANDATORY_FUNC(poll_cq), | |
105 | IB_MANDATORY_FUNC(req_notify_cq), | |
106 | IB_MANDATORY_FUNC(get_dma_mr), | |
7738613e IW |
107 | IB_MANDATORY_FUNC(dereg_mr), |
108 | IB_MANDATORY_FUNC(get_port_immutable) | |
1da177e4 LT |
109 | }; |
110 | int i; | |
111 | ||
9a6b090c | 112 | for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { |
1da177e4 LT |
113 | if (!*(void **) ((void *) device + mandatory_table[i].offset)) { |
114 | printk(KERN_WARNING "Device %s is missing mandatory function %s\n", | |
115 | device->name, mandatory_table[i].name); | |
116 | return -EINVAL; | |
117 | } | |
118 | } | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | static struct ib_device *__ib_device_get_by_name(const char *name) | |
124 | { | |
125 | struct ib_device *device; | |
126 | ||
127 | list_for_each_entry(device, &device_list, core_list) | |
128 | if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) | |
129 | return device; | |
130 | ||
131 | return NULL; | |
132 | } | |
133 | ||
134 | ||
135 | static int alloc_name(char *name) | |
136 | { | |
65d470b3 | 137 | unsigned long *inuse; |
1da177e4 LT |
138 | char buf[IB_DEVICE_NAME_MAX]; |
139 | struct ib_device *device; | |
140 | int i; | |
141 | ||
65d470b3 | 142 | inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
143 | if (!inuse) |
144 | return -ENOMEM; | |
145 | ||
146 | list_for_each_entry(device, &device_list, core_list) { | |
147 | if (!sscanf(device->name, name, &i)) | |
148 | continue; | |
149 | if (i < 0 || i >= PAGE_SIZE * 8) | |
150 | continue; | |
151 | snprintf(buf, sizeof buf, name, i); | |
152 | if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) | |
153 | set_bit(i, inuse); | |
154 | } | |
155 | ||
156 | i = find_first_zero_bit(inuse, PAGE_SIZE * 8); | |
157 | free_page((unsigned long) inuse); | |
158 | snprintf(buf, sizeof buf, name, i); | |
159 | ||
160 | if (__ib_device_get_by_name(buf)) | |
161 | return -ENFILE; | |
162 | ||
163 | strlcpy(name, buf, IB_DEVICE_NAME_MAX); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | /** | |
168 | * ib_alloc_device - allocate an IB device struct | |
169 | * @size:size of structure to allocate | |
170 | * | |
171 | * Low-level drivers should use ib_alloc_device() to allocate &struct | |
172 | * ib_device. @size is the size of the structure to be allocated, | |
173 | * including any private data used by the low-level driver. | |
174 | * ib_dealloc_device() must be used to free structures allocated with | |
175 | * ib_alloc_device(). | |
176 | */ | |
177 | struct ib_device *ib_alloc_device(size_t size) | |
178 | { | |
1da177e4 LT |
179 | BUG_ON(size < sizeof (struct ib_device)); |
180 | ||
de6eb66b | 181 | return kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
182 | } |
183 | EXPORT_SYMBOL(ib_alloc_device); | |
184 | ||
185 | /** | |
186 | * ib_dealloc_device - free an IB device struct | |
187 | * @device:structure to free | |
188 | * | |
189 | * Free a structure allocated with ib_alloc_device(). | |
190 | */ | |
191 | void ib_dealloc_device(struct ib_device *device) | |
192 | { | |
193 | if (device->reg_state == IB_DEV_UNINITIALIZED) { | |
194 | kfree(device); | |
195 | return; | |
196 | } | |
197 | ||
198 | BUG_ON(device->reg_state != IB_DEV_UNREGISTERED); | |
199 | ||
9206dff1 | 200 | kobject_put(&device->dev.kobj); |
1da177e4 LT |
201 | } |
202 | EXPORT_SYMBOL(ib_dealloc_device); | |
203 | ||
204 | static int add_client_context(struct ib_device *device, struct ib_client *client) | |
205 | { | |
206 | struct ib_client_data *context; | |
207 | unsigned long flags; | |
208 | ||
209 | context = kmalloc(sizeof *context, GFP_KERNEL); | |
210 | if (!context) { | |
211 | printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n", | |
212 | device->name, client->name); | |
213 | return -ENOMEM; | |
214 | } | |
215 | ||
216 | context->client = client; | |
217 | context->data = NULL; | |
7c1eb45a | 218 | context->going_down = false; |
1da177e4 | 219 | |
7c1eb45a | 220 | down_write(&lists_rwsem); |
1da177e4 LT |
221 | spin_lock_irqsave(&device->client_data_lock, flags); |
222 | list_add(&context->list, &device->client_data_list); | |
223 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
7c1eb45a | 224 | up_write(&lists_rwsem); |
1da177e4 LT |
225 | |
226 | return 0; | |
227 | } | |
228 | ||
337877a4 IW |
229 | static int verify_immutable(const struct ib_device *dev, u8 port) |
230 | { | |
231 | return WARN_ON(!rdma_cap_ib_mad(dev, port) && | |
232 | rdma_max_mad_size(dev, port) != 0); | |
233 | } | |
234 | ||
7738613e | 235 | static int read_port_immutable(struct ib_device *device) |
5eb620c8 | 236 | { |
7738613e IW |
237 | int ret = -ENOMEM; |
238 | u8 start_port = rdma_start_port(device); | |
239 | u8 end_port = rdma_end_port(device); | |
240 | u8 port; | |
241 | ||
242 | /** | |
243 | * device->port_immutable is indexed directly by the port number to make | |
244 | * access to this data as efficient as possible. | |
245 | * | |
246 | * Therefore port_immutable is declared as a 1 based array with | |
247 | * potential empty slots at the beginning. | |
248 | */ | |
249 | device->port_immutable = kzalloc(sizeof(*device->port_immutable) | |
250 | * (end_port + 1), | |
251 | GFP_KERNEL); | |
252 | if (!device->port_immutable) | |
5eb620c8 YE |
253 | goto err; |
254 | ||
7738613e IW |
255 | for (port = start_port; port <= end_port; ++port) { |
256 | ret = device->get_port_immutable(device, port, | |
257 | &device->port_immutable[port]); | |
5eb620c8 YE |
258 | if (ret) |
259 | goto err; | |
337877a4 IW |
260 | |
261 | if (verify_immutable(device, port)) { | |
262 | ret = -EINVAL; | |
263 | goto err; | |
264 | } | |
5eb620c8 YE |
265 | } |
266 | ||
267 | ret = 0; | |
268 | goto out; | |
5eb620c8 | 269 | err: |
7738613e | 270 | kfree(device->port_immutable); |
5eb620c8 | 271 | out: |
5eb620c8 YE |
272 | return ret; |
273 | } | |
274 | ||
1da177e4 LT |
275 | /** |
276 | * ib_register_device - Register an IB device with IB core | |
277 | * @device:Device to register | |
278 | * | |
279 | * Low-level drivers use ib_register_device() to register their | |
280 | * devices with the IB core. All registered clients will receive a | |
281 | * callback for each device that is added. @device must be allocated | |
282 | * with ib_alloc_device(). | |
283 | */ | |
9a6edb60 RC |
284 | int ib_register_device(struct ib_device *device, |
285 | int (*port_callback)(struct ib_device *, | |
286 | u8, struct kobject *)) | |
1da177e4 LT |
287 | { |
288 | int ret; | |
289 | ||
95ed644f | 290 | mutex_lock(&device_mutex); |
1da177e4 LT |
291 | |
292 | if (strchr(device->name, '%')) { | |
293 | ret = alloc_name(device->name); | |
294 | if (ret) | |
295 | goto out; | |
296 | } | |
297 | ||
298 | if (ib_device_check_mandatory(device)) { | |
299 | ret = -EINVAL; | |
300 | goto out; | |
301 | } | |
302 | ||
303 | INIT_LIST_HEAD(&device->event_handler_list); | |
304 | INIT_LIST_HEAD(&device->client_data_list); | |
305 | spin_lock_init(&device->event_handler_lock); | |
306 | spin_lock_init(&device->client_data_lock); | |
307 | ||
7738613e | 308 | ret = read_port_immutable(device); |
5eb620c8 | 309 | if (ret) { |
7738613e | 310 | printk(KERN_WARNING "Couldn't create per port immutable data %s\n", |
5eb620c8 YE |
311 | device->name); |
312 | goto out; | |
313 | } | |
314 | ||
9a6edb60 | 315 | ret = ib_device_register_sysfs(device, port_callback); |
1da177e4 LT |
316 | if (ret) { |
317 | printk(KERN_WARNING "Couldn't register device %s with driver model\n", | |
318 | device->name); | |
7738613e | 319 | kfree(device->port_immutable); |
1da177e4 LT |
320 | goto out; |
321 | } | |
322 | ||
1da177e4 LT |
323 | device->reg_state = IB_DEV_REGISTERED; |
324 | ||
325 | { | |
326 | struct ib_client *client; | |
327 | ||
328 | list_for_each_entry(client, &client_list, list) | |
329 | if (client->add && !add_client_context(device, client)) | |
330 | client->add(device); | |
331 | } | |
332 | ||
5aa44bb9 HE |
333 | down_write(&lists_rwsem); |
334 | list_add_tail(&device->core_list, &device_list); | |
335 | up_write(&lists_rwsem); | |
336 | out: | |
95ed644f | 337 | mutex_unlock(&device_mutex); |
1da177e4 LT |
338 | return ret; |
339 | } | |
340 | EXPORT_SYMBOL(ib_register_device); | |
341 | ||
342 | /** | |
343 | * ib_unregister_device - Unregister an IB device | |
344 | * @device:Device to unregister | |
345 | * | |
346 | * Unregister an IB device. All clients will receive a remove callback. | |
347 | */ | |
348 | void ib_unregister_device(struct ib_device *device) | |
349 | { | |
1da177e4 LT |
350 | struct ib_client_data *context, *tmp; |
351 | unsigned long flags; | |
352 | ||
95ed644f | 353 | mutex_lock(&device_mutex); |
1da177e4 | 354 | |
5aa44bb9 HE |
355 | down_write(&lists_rwsem); |
356 | list_del(&device->core_list); | |
7c1eb45a HE |
357 | spin_lock_irqsave(&device->client_data_lock, flags); |
358 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
359 | context->going_down = true; | |
360 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
361 | downgrade_write(&lists_rwsem); | |
5aa44bb9 | 362 | |
7c1eb45a HE |
363 | list_for_each_entry_safe(context, tmp, &device->client_data_list, |
364 | list) { | |
365 | if (context->client->remove) | |
366 | context->client->remove(device, context->data); | |
367 | } | |
368 | up_read(&lists_rwsem); | |
1da177e4 | 369 | |
95ed644f | 370 | mutex_unlock(&device_mutex); |
1da177e4 | 371 | |
9206dff1 RD |
372 | ib_device_unregister_sysfs(device); |
373 | ||
7c1eb45a | 374 | down_write(&lists_rwsem); |
1da177e4 LT |
375 | spin_lock_irqsave(&device->client_data_lock, flags); |
376 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
377 | kfree(context); | |
378 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
7c1eb45a | 379 | up_write(&lists_rwsem); |
1da177e4 LT |
380 | |
381 | device->reg_state = IB_DEV_UNREGISTERED; | |
382 | } | |
383 | EXPORT_SYMBOL(ib_unregister_device); | |
384 | ||
385 | /** | |
386 | * ib_register_client - Register an IB client | |
387 | * @client:Client to register | |
388 | * | |
389 | * Upper level users of the IB drivers can use ib_register_client() to | |
390 | * register callbacks for IB device addition and removal. When an IB | |
391 | * device is added, each registered client's add method will be called | |
392 | * (in the order the clients were registered), and when a device is | |
393 | * removed, each client's remove method will be called (in the reverse | |
394 | * order that clients were registered). In addition, when | |
395 | * ib_register_client() is called, the client will receive an add | |
396 | * callback for all devices already registered. | |
397 | */ | |
398 | int ib_register_client(struct ib_client *client) | |
399 | { | |
400 | struct ib_device *device; | |
401 | ||
95ed644f | 402 | mutex_lock(&device_mutex); |
1da177e4 | 403 | |
1da177e4 LT |
404 | list_for_each_entry(device, &device_list, core_list) |
405 | if (client->add && !add_client_context(device, client)) | |
406 | client->add(device); | |
407 | ||
5aa44bb9 HE |
408 | down_write(&lists_rwsem); |
409 | list_add_tail(&client->list, &client_list); | |
410 | up_write(&lists_rwsem); | |
411 | ||
95ed644f | 412 | mutex_unlock(&device_mutex); |
1da177e4 LT |
413 | |
414 | return 0; | |
415 | } | |
416 | EXPORT_SYMBOL(ib_register_client); | |
417 | ||
418 | /** | |
419 | * ib_unregister_client - Unregister an IB client | |
420 | * @client:Client to unregister | |
421 | * | |
422 | * Upper level users use ib_unregister_client() to remove their client | |
423 | * registration. When ib_unregister_client() is called, the client | |
424 | * will receive a remove callback for each IB device still registered. | |
425 | */ | |
426 | void ib_unregister_client(struct ib_client *client) | |
427 | { | |
428 | struct ib_client_data *context, *tmp; | |
429 | struct ib_device *device; | |
430 | unsigned long flags; | |
431 | ||
95ed644f | 432 | mutex_lock(&device_mutex); |
1da177e4 | 433 | |
5aa44bb9 HE |
434 | down_write(&lists_rwsem); |
435 | list_del(&client->list); | |
436 | up_write(&lists_rwsem); | |
437 | ||
1da177e4 | 438 | list_for_each_entry(device, &device_list, core_list) { |
7c1eb45a | 439 | struct ib_client_data *found_context = NULL; |
1da177e4 | 440 | |
7c1eb45a | 441 | down_write(&lists_rwsem); |
1da177e4 LT |
442 | spin_lock_irqsave(&device->client_data_lock, flags); |
443 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
444 | if (context->client == client) { | |
7c1eb45a HE |
445 | context->going_down = true; |
446 | found_context = context; | |
447 | break; | |
1da177e4 LT |
448 | } |
449 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
7c1eb45a HE |
450 | up_write(&lists_rwsem); |
451 | ||
452 | if (client->remove) | |
453 | client->remove(device, found_context ? | |
454 | found_context->data : NULL); | |
455 | ||
456 | if (!found_context) { | |
457 | pr_warn("No client context found for %s/%s\n", | |
458 | device->name, client->name); | |
459 | continue; | |
460 | } | |
461 | ||
462 | down_write(&lists_rwsem); | |
463 | spin_lock_irqsave(&device->client_data_lock, flags); | |
464 | list_del(&found_context->list); | |
465 | kfree(found_context); | |
466 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
467 | up_write(&lists_rwsem); | |
1da177e4 | 468 | } |
1da177e4 | 469 | |
95ed644f | 470 | mutex_unlock(&device_mutex); |
1da177e4 LT |
471 | } |
472 | EXPORT_SYMBOL(ib_unregister_client); | |
473 | ||
474 | /** | |
475 | * ib_get_client_data - Get IB client context | |
476 | * @device:Device to get context for | |
477 | * @client:Client to get context for | |
478 | * | |
479 | * ib_get_client_data() returns client context set with | |
480 | * ib_set_client_data(). | |
481 | */ | |
482 | void *ib_get_client_data(struct ib_device *device, struct ib_client *client) | |
483 | { | |
484 | struct ib_client_data *context; | |
485 | void *ret = NULL; | |
486 | unsigned long flags; | |
487 | ||
488 | spin_lock_irqsave(&device->client_data_lock, flags); | |
489 | list_for_each_entry(context, &device->client_data_list, list) | |
490 | if (context->client == client) { | |
491 | ret = context->data; | |
492 | break; | |
493 | } | |
494 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
495 | ||
496 | return ret; | |
497 | } | |
498 | EXPORT_SYMBOL(ib_get_client_data); | |
499 | ||
500 | /** | |
9cd330d3 | 501 | * ib_set_client_data - Set IB client context |
1da177e4 LT |
502 | * @device:Device to set context for |
503 | * @client:Client to set context for | |
504 | * @data:Context to set | |
505 | * | |
506 | * ib_set_client_data() sets client context that can be retrieved with | |
507 | * ib_get_client_data(). | |
508 | */ | |
509 | void ib_set_client_data(struct ib_device *device, struct ib_client *client, | |
510 | void *data) | |
511 | { | |
512 | struct ib_client_data *context; | |
513 | unsigned long flags; | |
514 | ||
515 | spin_lock_irqsave(&device->client_data_lock, flags); | |
516 | list_for_each_entry(context, &device->client_data_list, list) | |
517 | if (context->client == client) { | |
518 | context->data = data; | |
519 | goto out; | |
520 | } | |
521 | ||
522 | printk(KERN_WARNING "No client context found for %s/%s\n", | |
523 | device->name, client->name); | |
524 | ||
525 | out: | |
526 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
527 | } | |
528 | EXPORT_SYMBOL(ib_set_client_data); | |
529 | ||
530 | /** | |
531 | * ib_register_event_handler - Register an IB event handler | |
532 | * @event_handler:Handler to register | |
533 | * | |
534 | * ib_register_event_handler() registers an event handler that will be | |
535 | * called back when asynchronous IB events occur (as defined in | |
536 | * chapter 11 of the InfiniBand Architecture Specification). This | |
537 | * callback may occur in interrupt context. | |
538 | */ | |
539 | int ib_register_event_handler (struct ib_event_handler *event_handler) | |
540 | { | |
541 | unsigned long flags; | |
542 | ||
543 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
544 | list_add_tail(&event_handler->list, | |
545 | &event_handler->device->event_handler_list); | |
546 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
547 | ||
548 | return 0; | |
549 | } | |
550 | EXPORT_SYMBOL(ib_register_event_handler); | |
551 | ||
552 | /** | |
553 | * ib_unregister_event_handler - Unregister an event handler | |
554 | * @event_handler:Handler to unregister | |
555 | * | |
556 | * Unregister an event handler registered with | |
557 | * ib_register_event_handler(). | |
558 | */ | |
559 | int ib_unregister_event_handler(struct ib_event_handler *event_handler) | |
560 | { | |
561 | unsigned long flags; | |
562 | ||
563 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
564 | list_del(&event_handler->list); | |
565 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
566 | ||
567 | return 0; | |
568 | } | |
569 | EXPORT_SYMBOL(ib_unregister_event_handler); | |
570 | ||
571 | /** | |
572 | * ib_dispatch_event - Dispatch an asynchronous event | |
573 | * @event:Event to dispatch | |
574 | * | |
575 | * Low-level drivers must call ib_dispatch_event() to dispatch the | |
576 | * event to all registered event handlers when an asynchronous event | |
577 | * occurs. | |
578 | */ | |
579 | void ib_dispatch_event(struct ib_event *event) | |
580 | { | |
581 | unsigned long flags; | |
582 | struct ib_event_handler *handler; | |
583 | ||
584 | spin_lock_irqsave(&event->device->event_handler_lock, flags); | |
585 | ||
586 | list_for_each_entry(handler, &event->device->event_handler_list, list) | |
587 | handler->handler(handler, event); | |
588 | ||
589 | spin_unlock_irqrestore(&event->device->event_handler_lock, flags); | |
590 | } | |
591 | EXPORT_SYMBOL(ib_dispatch_event); | |
592 | ||
593 | /** | |
594 | * ib_query_device - Query IB device attributes | |
595 | * @device:Device to query | |
596 | * @device_attr:Device attributes | |
597 | * | |
598 | * ib_query_device() returns the attributes of a device through the | |
599 | * @device_attr pointer. | |
600 | */ | |
601 | int ib_query_device(struct ib_device *device, | |
602 | struct ib_device_attr *device_attr) | |
603 | { | |
2528e33e MB |
604 | struct ib_udata uhw = {.outlen = 0, .inlen = 0}; |
605 | ||
24306dc6 MB |
606 | memset(device_attr, 0, sizeof(*device_attr)); |
607 | ||
2528e33e | 608 | return device->query_device(device, device_attr, &uhw); |
1da177e4 LT |
609 | } |
610 | EXPORT_SYMBOL(ib_query_device); | |
611 | ||
612 | /** | |
613 | * ib_query_port - Query IB port attributes | |
614 | * @device:Device to query | |
615 | * @port_num:Port number to query | |
616 | * @port_attr:Port attributes | |
617 | * | |
618 | * ib_query_port() returns the attributes of a port through the | |
619 | * @port_attr pointer. | |
620 | */ | |
621 | int ib_query_port(struct ib_device *device, | |
622 | u8 port_num, | |
623 | struct ib_port_attr *port_attr) | |
624 | { | |
0cf18d77 | 625 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
116c0074 RD |
626 | return -EINVAL; |
627 | ||
1da177e4 LT |
628 | return device->query_port(device, port_num, port_attr); |
629 | } | |
630 | EXPORT_SYMBOL(ib_query_port); | |
631 | ||
632 | /** | |
633 | * ib_query_gid - Get GID table entry | |
634 | * @device:Device to query | |
635 | * @port_num:Port number to query | |
636 | * @index:GID table index to query | |
637 | * @gid:Returned GID | |
638 | * | |
639 | * ib_query_gid() fetches the specified GID table entry. | |
640 | */ | |
641 | int ib_query_gid(struct ib_device *device, | |
642 | u8 port_num, int index, union ib_gid *gid) | |
643 | { | |
644 | return device->query_gid(device, port_num, index, gid); | |
645 | } | |
646 | EXPORT_SYMBOL(ib_query_gid); | |
647 | ||
648 | /** | |
649 | * ib_query_pkey - Get P_Key table entry | |
650 | * @device:Device to query | |
651 | * @port_num:Port number to query | |
652 | * @index:P_Key table index to query | |
653 | * @pkey:Returned P_Key | |
654 | * | |
655 | * ib_query_pkey() fetches the specified P_Key table entry. | |
656 | */ | |
657 | int ib_query_pkey(struct ib_device *device, | |
658 | u8 port_num, u16 index, u16 *pkey) | |
659 | { | |
660 | return device->query_pkey(device, port_num, index, pkey); | |
661 | } | |
662 | EXPORT_SYMBOL(ib_query_pkey); | |
663 | ||
664 | /** | |
665 | * ib_modify_device - Change IB device attributes | |
666 | * @device:Device to modify | |
667 | * @device_modify_mask:Mask of attributes to change | |
668 | * @device_modify:New attribute values | |
669 | * | |
670 | * ib_modify_device() changes a device's attributes as specified by | |
671 | * the @device_modify_mask and @device_modify structure. | |
672 | */ | |
673 | int ib_modify_device(struct ib_device *device, | |
674 | int device_modify_mask, | |
675 | struct ib_device_modify *device_modify) | |
676 | { | |
10e1b54b BVA |
677 | if (!device->modify_device) |
678 | return -ENOSYS; | |
679 | ||
1da177e4 LT |
680 | return device->modify_device(device, device_modify_mask, |
681 | device_modify); | |
682 | } | |
683 | EXPORT_SYMBOL(ib_modify_device); | |
684 | ||
685 | /** | |
686 | * ib_modify_port - Modifies the attributes for the specified port. | |
687 | * @device: The device to modify. | |
688 | * @port_num: The number of the port to modify. | |
689 | * @port_modify_mask: Mask used to specify which attributes of the port | |
690 | * to change. | |
691 | * @port_modify: New attribute values for the port. | |
692 | * | |
693 | * ib_modify_port() changes a port's attributes as specified by the | |
694 | * @port_modify_mask and @port_modify structure. | |
695 | */ | |
696 | int ib_modify_port(struct ib_device *device, | |
697 | u8 port_num, int port_modify_mask, | |
698 | struct ib_port_modify *port_modify) | |
699 | { | |
10e1b54b BVA |
700 | if (!device->modify_port) |
701 | return -ENOSYS; | |
702 | ||
0cf18d77 | 703 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
116c0074 RD |
704 | return -EINVAL; |
705 | ||
1da177e4 LT |
706 | return device->modify_port(device, port_num, port_modify_mask, |
707 | port_modify); | |
708 | } | |
709 | EXPORT_SYMBOL(ib_modify_port); | |
710 | ||
5eb620c8 YE |
711 | /** |
712 | * ib_find_gid - Returns the port number and GID table index where | |
713 | * a specified GID value occurs. | |
714 | * @device: The device to query. | |
715 | * @gid: The GID value to search for. | |
716 | * @port_num: The port number of the device where the GID value was found. | |
717 | * @index: The index into the GID table where the GID was found. This | |
718 | * parameter may be NULL. | |
719 | */ | |
720 | int ib_find_gid(struct ib_device *device, union ib_gid *gid, | |
721 | u8 *port_num, u16 *index) | |
722 | { | |
723 | union ib_gid tmp_gid; | |
724 | int ret, port, i; | |
725 | ||
0cf18d77 | 726 | for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { |
7738613e | 727 | for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { |
5eb620c8 YE |
728 | ret = ib_query_gid(device, port, i, &tmp_gid); |
729 | if (ret) | |
730 | return ret; | |
731 | if (!memcmp(&tmp_gid, gid, sizeof *gid)) { | |
732 | *port_num = port; | |
733 | if (index) | |
734 | *index = i; | |
735 | return 0; | |
736 | } | |
737 | } | |
738 | } | |
739 | ||
740 | return -ENOENT; | |
741 | } | |
742 | EXPORT_SYMBOL(ib_find_gid); | |
743 | ||
744 | /** | |
745 | * ib_find_pkey - Returns the PKey table index where a specified | |
746 | * PKey value occurs. | |
747 | * @device: The device to query. | |
748 | * @port_num: The port number of the device to search for the PKey. | |
749 | * @pkey: The PKey value to search for. | |
750 | * @index: The index into the PKey table where the PKey was found. | |
751 | */ | |
752 | int ib_find_pkey(struct ib_device *device, | |
753 | u8 port_num, u16 pkey, u16 *index) | |
754 | { | |
755 | int ret, i; | |
756 | u16 tmp_pkey; | |
ff7166c4 | 757 | int partial_ix = -1; |
5eb620c8 | 758 | |
7738613e | 759 | for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { |
5eb620c8 YE |
760 | ret = ib_query_pkey(device, port_num, i, &tmp_pkey); |
761 | if (ret) | |
762 | return ret; | |
36026ecc | 763 | if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { |
ff7166c4 JM |
764 | /* if there is full-member pkey take it.*/ |
765 | if (tmp_pkey & 0x8000) { | |
766 | *index = i; | |
767 | return 0; | |
768 | } | |
769 | if (partial_ix < 0) | |
770 | partial_ix = i; | |
5eb620c8 YE |
771 | } |
772 | } | |
773 | ||
ff7166c4 JM |
774 | /*no full-member, if exists take the limited*/ |
775 | if (partial_ix >= 0) { | |
776 | *index = partial_ix; | |
777 | return 0; | |
778 | } | |
5eb620c8 YE |
779 | return -ENOENT; |
780 | } | |
781 | EXPORT_SYMBOL(ib_find_pkey); | |
782 | ||
1da177e4 LT |
783 | static int __init ib_core_init(void) |
784 | { | |
785 | int ret; | |
786 | ||
f0626710 TH |
787 | ib_wq = alloc_workqueue("infiniband", 0, 0); |
788 | if (!ib_wq) | |
789 | return -ENOMEM; | |
790 | ||
1da177e4 | 791 | ret = ib_sysfs_setup(); |
fd75c789 | 792 | if (ret) { |
1da177e4 | 793 | printk(KERN_WARNING "Couldn't create InfiniBand device class\n"); |
fd75c789 NM |
794 | goto err; |
795 | } | |
1da177e4 | 796 | |
b2cbae2c RD |
797 | ret = ibnl_init(); |
798 | if (ret) { | |
799 | printk(KERN_WARNING "Couldn't init IB netlink interface\n"); | |
800 | goto err_sysfs; | |
801 | } | |
802 | ||
1da177e4 LT |
803 | ret = ib_cache_setup(); |
804 | if (ret) { | |
805 | printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n"); | |
b2cbae2c | 806 | goto err_nl; |
1da177e4 LT |
807 | } |
808 | ||
fd75c789 NM |
809 | return 0; |
810 | ||
b2cbae2c RD |
811 | err_nl: |
812 | ibnl_cleanup(); | |
813 | ||
fd75c789 NM |
814 | err_sysfs: |
815 | ib_sysfs_cleanup(); | |
816 | ||
817 | err: | |
818 | destroy_workqueue(ib_wq); | |
1da177e4 LT |
819 | return ret; |
820 | } | |
821 | ||
822 | static void __exit ib_core_cleanup(void) | |
823 | { | |
824 | ib_cache_cleanup(); | |
b2cbae2c | 825 | ibnl_cleanup(); |
1da177e4 | 826 | ib_sysfs_cleanup(); |
f7c6a7b5 | 827 | /* Make sure that any pending umem accounting work is done. */ |
f0626710 | 828 | destroy_workqueue(ib_wq); |
1da177e4 LT |
829 | } |
830 | ||
831 | module_init(ib_core_init); | |
832 | module_exit(ib_core_cleanup); |