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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> |
9268f72d | 41 | #include <linux/netdevice.h> |
b2cbae2c | 42 | #include <rdma/rdma_netlink.h> |
03db3a2d MB |
43 | #include <rdma/ib_addr.h> |
44 | #include <rdma/ib_cache.h> | |
1da177e4 LT |
45 | |
46 | #include "core_priv.h" | |
47 | ||
48 | MODULE_AUTHOR("Roland Dreier"); | |
49 | MODULE_DESCRIPTION("core kernel InfiniBand API"); | |
50 | MODULE_LICENSE("Dual BSD/GPL"); | |
51 | ||
52 | struct ib_client_data { | |
53 | struct list_head list; | |
54 | struct ib_client *client; | |
55 | void * data; | |
7c1eb45a HE |
56 | /* The device or client is going down. Do not call client or device |
57 | * callbacks other than remove(). */ | |
58 | bool going_down; | |
1da177e4 LT |
59 | }; |
60 | ||
f0626710 TH |
61 | struct workqueue_struct *ib_wq; |
62 | EXPORT_SYMBOL_GPL(ib_wq); | |
63 | ||
5aa44bb9 HE |
64 | /* The device_list and client_list contain devices and clients after their |
65 | * registration has completed, and the devices and clients are removed | |
66 | * during unregistration. */ | |
1da177e4 LT |
67 | static LIST_HEAD(device_list); |
68 | static LIST_HEAD(client_list); | |
69 | ||
70 | /* | |
5aa44bb9 HE |
71 | * device_mutex and lists_rwsem protect access to both device_list and |
72 | * client_list. device_mutex protects writer access by device and client | |
73 | * registration / de-registration. lists_rwsem protects reader access to | |
74 | * these lists. Iterators of these lists must lock it for read, while updates | |
75 | * to the lists must be done with a write lock. A special case is when the | |
76 | * device_mutex is locked. In this case locking the lists for read access is | |
77 | * not necessary as the device_mutex implies it. | |
7c1eb45a HE |
78 | * |
79 | * lists_rwsem also protects access to the client data list. | |
1da177e4 | 80 | */ |
95ed644f | 81 | static DEFINE_MUTEX(device_mutex); |
5aa44bb9 HE |
82 | static DECLARE_RWSEM(lists_rwsem); |
83 | ||
1da177e4 LT |
84 | |
85 | static int ib_device_check_mandatory(struct ib_device *device) | |
86 | { | |
87 | #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } | |
88 | static const struct { | |
89 | size_t offset; | |
90 | char *name; | |
91 | } mandatory_table[] = { | |
92 | IB_MANDATORY_FUNC(query_device), | |
93 | IB_MANDATORY_FUNC(query_port), | |
94 | IB_MANDATORY_FUNC(query_pkey), | |
95 | IB_MANDATORY_FUNC(query_gid), | |
96 | IB_MANDATORY_FUNC(alloc_pd), | |
97 | IB_MANDATORY_FUNC(dealloc_pd), | |
98 | IB_MANDATORY_FUNC(create_ah), | |
99 | IB_MANDATORY_FUNC(destroy_ah), | |
100 | IB_MANDATORY_FUNC(create_qp), | |
101 | IB_MANDATORY_FUNC(modify_qp), | |
102 | IB_MANDATORY_FUNC(destroy_qp), | |
103 | IB_MANDATORY_FUNC(post_send), | |
104 | IB_MANDATORY_FUNC(post_recv), | |
105 | IB_MANDATORY_FUNC(create_cq), | |
106 | IB_MANDATORY_FUNC(destroy_cq), | |
107 | IB_MANDATORY_FUNC(poll_cq), | |
108 | IB_MANDATORY_FUNC(req_notify_cq), | |
109 | IB_MANDATORY_FUNC(get_dma_mr), | |
7738613e IW |
110 | IB_MANDATORY_FUNC(dereg_mr), |
111 | IB_MANDATORY_FUNC(get_port_immutable) | |
1da177e4 LT |
112 | }; |
113 | int i; | |
114 | ||
9a6b090c | 115 | for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { |
1da177e4 LT |
116 | if (!*(void **) ((void *) device + mandatory_table[i].offset)) { |
117 | printk(KERN_WARNING "Device %s is missing mandatory function %s\n", | |
118 | device->name, mandatory_table[i].name); | |
119 | return -EINVAL; | |
120 | } | |
121 | } | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | static struct ib_device *__ib_device_get_by_name(const char *name) | |
127 | { | |
128 | struct ib_device *device; | |
129 | ||
130 | list_for_each_entry(device, &device_list, core_list) | |
131 | if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) | |
132 | return device; | |
133 | ||
134 | return NULL; | |
135 | } | |
136 | ||
137 | ||
138 | static int alloc_name(char *name) | |
139 | { | |
65d470b3 | 140 | unsigned long *inuse; |
1da177e4 LT |
141 | char buf[IB_DEVICE_NAME_MAX]; |
142 | struct ib_device *device; | |
143 | int i; | |
144 | ||
65d470b3 | 145 | inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
146 | if (!inuse) |
147 | return -ENOMEM; | |
148 | ||
149 | list_for_each_entry(device, &device_list, core_list) { | |
150 | if (!sscanf(device->name, name, &i)) | |
151 | continue; | |
152 | if (i < 0 || i >= PAGE_SIZE * 8) | |
153 | continue; | |
154 | snprintf(buf, sizeof buf, name, i); | |
155 | if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) | |
156 | set_bit(i, inuse); | |
157 | } | |
158 | ||
159 | i = find_first_zero_bit(inuse, PAGE_SIZE * 8); | |
160 | free_page((unsigned long) inuse); | |
161 | snprintf(buf, sizeof buf, name, i); | |
162 | ||
163 | if (__ib_device_get_by_name(buf)) | |
164 | return -ENFILE; | |
165 | ||
166 | strlcpy(name, buf, IB_DEVICE_NAME_MAX); | |
167 | return 0; | |
168 | } | |
169 | ||
55aeed06 JG |
170 | static void ib_device_release(struct device *device) |
171 | { | |
172 | struct ib_device *dev = container_of(device, struct ib_device, dev); | |
173 | ||
03db3a2d | 174 | ib_cache_release_one(dev); |
55aeed06 JG |
175 | kfree(dev->port_immutable); |
176 | kfree(dev); | |
177 | } | |
178 | ||
179 | static int ib_device_uevent(struct device *device, | |
180 | struct kobj_uevent_env *env) | |
181 | { | |
182 | struct ib_device *dev = container_of(device, struct ib_device, dev); | |
183 | ||
184 | if (add_uevent_var(env, "NAME=%s", dev->name)) | |
185 | return -ENOMEM; | |
186 | ||
187 | /* | |
188 | * It would be nice to pass the node GUID with the event... | |
189 | */ | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | static struct class ib_class = { | |
195 | .name = "infiniband", | |
196 | .dev_release = ib_device_release, | |
197 | .dev_uevent = ib_device_uevent, | |
198 | }; | |
199 | ||
1da177e4 LT |
200 | /** |
201 | * ib_alloc_device - allocate an IB device struct | |
202 | * @size:size of structure to allocate | |
203 | * | |
204 | * Low-level drivers should use ib_alloc_device() to allocate &struct | |
205 | * ib_device. @size is the size of the structure to be allocated, | |
206 | * including any private data used by the low-level driver. | |
207 | * ib_dealloc_device() must be used to free structures allocated with | |
208 | * ib_alloc_device(). | |
209 | */ | |
210 | struct ib_device *ib_alloc_device(size_t size) | |
211 | { | |
55aeed06 JG |
212 | struct ib_device *device; |
213 | ||
214 | if (WARN_ON(size < sizeof(struct ib_device))) | |
215 | return NULL; | |
216 | ||
217 | device = kzalloc(size, GFP_KERNEL); | |
218 | if (!device) | |
219 | return NULL; | |
220 | ||
221 | device->dev.class = &ib_class; | |
222 | device_initialize(&device->dev); | |
223 | ||
224 | dev_set_drvdata(&device->dev, device); | |
225 | ||
226 | INIT_LIST_HEAD(&device->event_handler_list); | |
227 | spin_lock_init(&device->event_handler_lock); | |
228 | spin_lock_init(&device->client_data_lock); | |
229 | INIT_LIST_HEAD(&device->client_data_list); | |
230 | INIT_LIST_HEAD(&device->port_list); | |
1da177e4 | 231 | |
55aeed06 | 232 | return device; |
1da177e4 LT |
233 | } |
234 | EXPORT_SYMBOL(ib_alloc_device); | |
235 | ||
236 | /** | |
237 | * ib_dealloc_device - free an IB device struct | |
238 | * @device:structure to free | |
239 | * | |
240 | * Free a structure allocated with ib_alloc_device(). | |
241 | */ | |
242 | void ib_dealloc_device(struct ib_device *device) | |
243 | { | |
55aeed06 JG |
244 | WARN_ON(device->reg_state != IB_DEV_UNREGISTERED && |
245 | device->reg_state != IB_DEV_UNINITIALIZED); | |
9206dff1 | 246 | kobject_put(&device->dev.kobj); |
1da177e4 LT |
247 | } |
248 | EXPORT_SYMBOL(ib_dealloc_device); | |
249 | ||
250 | static int add_client_context(struct ib_device *device, struct ib_client *client) | |
251 | { | |
252 | struct ib_client_data *context; | |
253 | unsigned long flags; | |
254 | ||
255 | context = kmalloc(sizeof *context, GFP_KERNEL); | |
256 | if (!context) { | |
257 | printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n", | |
258 | device->name, client->name); | |
259 | return -ENOMEM; | |
260 | } | |
261 | ||
262 | context->client = client; | |
263 | context->data = NULL; | |
7c1eb45a | 264 | context->going_down = false; |
1da177e4 | 265 | |
7c1eb45a | 266 | down_write(&lists_rwsem); |
1da177e4 LT |
267 | spin_lock_irqsave(&device->client_data_lock, flags); |
268 | list_add(&context->list, &device->client_data_list); | |
269 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
7c1eb45a | 270 | up_write(&lists_rwsem); |
1da177e4 LT |
271 | |
272 | return 0; | |
273 | } | |
274 | ||
337877a4 IW |
275 | static int verify_immutable(const struct ib_device *dev, u8 port) |
276 | { | |
277 | return WARN_ON(!rdma_cap_ib_mad(dev, port) && | |
278 | rdma_max_mad_size(dev, port) != 0); | |
279 | } | |
280 | ||
7738613e | 281 | static int read_port_immutable(struct ib_device *device) |
5eb620c8 | 282 | { |
55aeed06 | 283 | int ret; |
7738613e IW |
284 | u8 start_port = rdma_start_port(device); |
285 | u8 end_port = rdma_end_port(device); | |
286 | u8 port; | |
287 | ||
288 | /** | |
289 | * device->port_immutable is indexed directly by the port number to make | |
290 | * access to this data as efficient as possible. | |
291 | * | |
292 | * Therefore port_immutable is declared as a 1 based array with | |
293 | * potential empty slots at the beginning. | |
294 | */ | |
295 | device->port_immutable = kzalloc(sizeof(*device->port_immutable) | |
296 | * (end_port + 1), | |
297 | GFP_KERNEL); | |
298 | if (!device->port_immutable) | |
55aeed06 | 299 | return -ENOMEM; |
5eb620c8 | 300 | |
7738613e IW |
301 | for (port = start_port; port <= end_port; ++port) { |
302 | ret = device->get_port_immutable(device, port, | |
303 | &device->port_immutable[port]); | |
5eb620c8 | 304 | if (ret) |
55aeed06 | 305 | return ret; |
337877a4 | 306 | |
55aeed06 JG |
307 | if (verify_immutable(device, port)) |
308 | return -EINVAL; | |
5eb620c8 | 309 | } |
55aeed06 | 310 | return 0; |
5eb620c8 YE |
311 | } |
312 | ||
1da177e4 LT |
313 | /** |
314 | * ib_register_device - Register an IB device with IB core | |
315 | * @device:Device to register | |
316 | * | |
317 | * Low-level drivers use ib_register_device() to register their | |
318 | * devices with the IB core. All registered clients will receive a | |
319 | * callback for each device that is added. @device must be allocated | |
320 | * with ib_alloc_device(). | |
321 | */ | |
9a6edb60 RC |
322 | int ib_register_device(struct ib_device *device, |
323 | int (*port_callback)(struct ib_device *, | |
324 | u8, struct kobject *)) | |
1da177e4 LT |
325 | { |
326 | int ret; | |
b8071ad8 | 327 | struct ib_client *client; |
1da177e4 | 328 | |
95ed644f | 329 | mutex_lock(&device_mutex); |
1da177e4 LT |
330 | |
331 | if (strchr(device->name, '%')) { | |
332 | ret = alloc_name(device->name); | |
333 | if (ret) | |
334 | goto out; | |
335 | } | |
336 | ||
337 | if (ib_device_check_mandatory(device)) { | |
338 | ret = -EINVAL; | |
339 | goto out; | |
340 | } | |
341 | ||
7738613e | 342 | ret = read_port_immutable(device); |
5eb620c8 | 343 | if (ret) { |
7738613e | 344 | printk(KERN_WARNING "Couldn't create per port immutable data %s\n", |
5eb620c8 YE |
345 | device->name); |
346 | goto out; | |
347 | } | |
348 | ||
03db3a2d MB |
349 | ret = ib_cache_setup_one(device); |
350 | if (ret) { | |
351 | printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n"); | |
352 | goto out; | |
353 | } | |
354 | ||
9a6edb60 | 355 | ret = ib_device_register_sysfs(device, port_callback); |
1da177e4 LT |
356 | if (ret) { |
357 | printk(KERN_WARNING "Couldn't register device %s with driver model\n", | |
358 | device->name); | |
03db3a2d | 359 | ib_cache_cleanup_one(device); |
1da177e4 LT |
360 | goto out; |
361 | } | |
362 | ||
1da177e4 LT |
363 | device->reg_state = IB_DEV_REGISTERED; |
364 | ||
b8071ad8 DL |
365 | list_for_each_entry(client, &client_list, list) |
366 | if (client->add && !add_client_context(device, client)) | |
367 | client->add(device); | |
1da177e4 | 368 | |
5aa44bb9 HE |
369 | down_write(&lists_rwsem); |
370 | list_add_tail(&device->core_list, &device_list); | |
371 | up_write(&lists_rwsem); | |
372 | out: | |
95ed644f | 373 | mutex_unlock(&device_mutex); |
1da177e4 LT |
374 | return ret; |
375 | } | |
376 | EXPORT_SYMBOL(ib_register_device); | |
377 | ||
378 | /** | |
379 | * ib_unregister_device - Unregister an IB device | |
380 | * @device:Device to unregister | |
381 | * | |
382 | * Unregister an IB device. All clients will receive a remove callback. | |
383 | */ | |
384 | void ib_unregister_device(struct ib_device *device) | |
385 | { | |
1da177e4 LT |
386 | struct ib_client_data *context, *tmp; |
387 | unsigned long flags; | |
388 | ||
95ed644f | 389 | mutex_lock(&device_mutex); |
1da177e4 | 390 | |
5aa44bb9 HE |
391 | down_write(&lists_rwsem); |
392 | list_del(&device->core_list); | |
7c1eb45a HE |
393 | spin_lock_irqsave(&device->client_data_lock, flags); |
394 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
395 | context->going_down = true; | |
396 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
397 | downgrade_write(&lists_rwsem); | |
5aa44bb9 | 398 | |
7c1eb45a HE |
399 | list_for_each_entry_safe(context, tmp, &device->client_data_list, |
400 | list) { | |
401 | if (context->client->remove) | |
402 | context->client->remove(device, context->data); | |
403 | } | |
404 | up_read(&lists_rwsem); | |
1da177e4 | 405 | |
95ed644f | 406 | mutex_unlock(&device_mutex); |
1da177e4 | 407 | |
9206dff1 | 408 | ib_device_unregister_sysfs(device); |
03db3a2d | 409 | ib_cache_cleanup_one(device); |
9206dff1 | 410 | |
7c1eb45a | 411 | down_write(&lists_rwsem); |
1da177e4 LT |
412 | spin_lock_irqsave(&device->client_data_lock, flags); |
413 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
414 | kfree(context); | |
415 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
7c1eb45a | 416 | up_write(&lists_rwsem); |
1da177e4 LT |
417 | |
418 | device->reg_state = IB_DEV_UNREGISTERED; | |
419 | } | |
420 | EXPORT_SYMBOL(ib_unregister_device); | |
421 | ||
422 | /** | |
423 | * ib_register_client - Register an IB client | |
424 | * @client:Client to register | |
425 | * | |
426 | * Upper level users of the IB drivers can use ib_register_client() to | |
427 | * register callbacks for IB device addition and removal. When an IB | |
428 | * device is added, each registered client's add method will be called | |
429 | * (in the order the clients were registered), and when a device is | |
430 | * removed, each client's remove method will be called (in the reverse | |
431 | * order that clients were registered). In addition, when | |
432 | * ib_register_client() is called, the client will receive an add | |
433 | * callback for all devices already registered. | |
434 | */ | |
435 | int ib_register_client(struct ib_client *client) | |
436 | { | |
437 | struct ib_device *device; | |
438 | ||
95ed644f | 439 | mutex_lock(&device_mutex); |
1da177e4 | 440 | |
1da177e4 LT |
441 | list_for_each_entry(device, &device_list, core_list) |
442 | if (client->add && !add_client_context(device, client)) | |
443 | client->add(device); | |
444 | ||
5aa44bb9 HE |
445 | down_write(&lists_rwsem); |
446 | list_add_tail(&client->list, &client_list); | |
447 | up_write(&lists_rwsem); | |
448 | ||
95ed644f | 449 | mutex_unlock(&device_mutex); |
1da177e4 LT |
450 | |
451 | return 0; | |
452 | } | |
453 | EXPORT_SYMBOL(ib_register_client); | |
454 | ||
455 | /** | |
456 | * ib_unregister_client - Unregister an IB client | |
457 | * @client:Client to unregister | |
458 | * | |
459 | * Upper level users use ib_unregister_client() to remove their client | |
460 | * registration. When ib_unregister_client() is called, the client | |
461 | * will receive a remove callback for each IB device still registered. | |
462 | */ | |
463 | void ib_unregister_client(struct ib_client *client) | |
464 | { | |
465 | struct ib_client_data *context, *tmp; | |
466 | struct ib_device *device; | |
467 | unsigned long flags; | |
468 | ||
95ed644f | 469 | mutex_lock(&device_mutex); |
1da177e4 | 470 | |
5aa44bb9 HE |
471 | down_write(&lists_rwsem); |
472 | list_del(&client->list); | |
473 | up_write(&lists_rwsem); | |
474 | ||
1da177e4 | 475 | list_for_each_entry(device, &device_list, core_list) { |
7c1eb45a | 476 | struct ib_client_data *found_context = NULL; |
1da177e4 | 477 | |
7c1eb45a | 478 | down_write(&lists_rwsem); |
1da177e4 LT |
479 | spin_lock_irqsave(&device->client_data_lock, flags); |
480 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
481 | if (context->client == client) { | |
7c1eb45a HE |
482 | context->going_down = true; |
483 | found_context = context; | |
484 | break; | |
1da177e4 LT |
485 | } |
486 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
7c1eb45a HE |
487 | up_write(&lists_rwsem); |
488 | ||
489 | if (client->remove) | |
490 | client->remove(device, found_context ? | |
491 | found_context->data : NULL); | |
492 | ||
493 | if (!found_context) { | |
494 | pr_warn("No client context found for %s/%s\n", | |
495 | device->name, client->name); | |
496 | continue; | |
497 | } | |
498 | ||
499 | down_write(&lists_rwsem); | |
500 | spin_lock_irqsave(&device->client_data_lock, flags); | |
501 | list_del(&found_context->list); | |
502 | kfree(found_context); | |
503 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
504 | up_write(&lists_rwsem); | |
1da177e4 | 505 | } |
1da177e4 | 506 | |
95ed644f | 507 | mutex_unlock(&device_mutex); |
1da177e4 LT |
508 | } |
509 | EXPORT_SYMBOL(ib_unregister_client); | |
510 | ||
511 | /** | |
512 | * ib_get_client_data - Get IB client context | |
513 | * @device:Device to get context for | |
514 | * @client:Client to get context for | |
515 | * | |
516 | * ib_get_client_data() returns client context set with | |
517 | * ib_set_client_data(). | |
518 | */ | |
519 | void *ib_get_client_data(struct ib_device *device, struct ib_client *client) | |
520 | { | |
521 | struct ib_client_data *context; | |
522 | void *ret = NULL; | |
523 | unsigned long flags; | |
524 | ||
525 | spin_lock_irqsave(&device->client_data_lock, flags); | |
526 | list_for_each_entry(context, &device->client_data_list, list) | |
527 | if (context->client == client) { | |
528 | ret = context->data; | |
529 | break; | |
530 | } | |
531 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
532 | ||
533 | return ret; | |
534 | } | |
535 | EXPORT_SYMBOL(ib_get_client_data); | |
536 | ||
537 | /** | |
9cd330d3 | 538 | * ib_set_client_data - Set IB client context |
1da177e4 LT |
539 | * @device:Device to set context for |
540 | * @client:Client to set context for | |
541 | * @data:Context to set | |
542 | * | |
543 | * ib_set_client_data() sets client context that can be retrieved with | |
544 | * ib_get_client_data(). | |
545 | */ | |
546 | void ib_set_client_data(struct ib_device *device, struct ib_client *client, | |
547 | void *data) | |
548 | { | |
549 | struct ib_client_data *context; | |
550 | unsigned long flags; | |
551 | ||
552 | spin_lock_irqsave(&device->client_data_lock, flags); | |
553 | list_for_each_entry(context, &device->client_data_list, list) | |
554 | if (context->client == client) { | |
555 | context->data = data; | |
556 | goto out; | |
557 | } | |
558 | ||
559 | printk(KERN_WARNING "No client context found for %s/%s\n", | |
560 | device->name, client->name); | |
561 | ||
562 | out: | |
563 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
564 | } | |
565 | EXPORT_SYMBOL(ib_set_client_data); | |
566 | ||
567 | /** | |
568 | * ib_register_event_handler - Register an IB event handler | |
569 | * @event_handler:Handler to register | |
570 | * | |
571 | * ib_register_event_handler() registers an event handler that will be | |
572 | * called back when asynchronous IB events occur (as defined in | |
573 | * chapter 11 of the InfiniBand Architecture Specification). This | |
574 | * callback may occur in interrupt context. | |
575 | */ | |
576 | int ib_register_event_handler (struct ib_event_handler *event_handler) | |
577 | { | |
578 | unsigned long flags; | |
579 | ||
580 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
581 | list_add_tail(&event_handler->list, | |
582 | &event_handler->device->event_handler_list); | |
583 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
584 | ||
585 | return 0; | |
586 | } | |
587 | EXPORT_SYMBOL(ib_register_event_handler); | |
588 | ||
589 | /** | |
590 | * ib_unregister_event_handler - Unregister an event handler | |
591 | * @event_handler:Handler to unregister | |
592 | * | |
593 | * Unregister an event handler registered with | |
594 | * ib_register_event_handler(). | |
595 | */ | |
596 | int ib_unregister_event_handler(struct ib_event_handler *event_handler) | |
597 | { | |
598 | unsigned long flags; | |
599 | ||
600 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
601 | list_del(&event_handler->list); | |
602 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
603 | ||
604 | return 0; | |
605 | } | |
606 | EXPORT_SYMBOL(ib_unregister_event_handler); | |
607 | ||
608 | /** | |
609 | * ib_dispatch_event - Dispatch an asynchronous event | |
610 | * @event:Event to dispatch | |
611 | * | |
612 | * Low-level drivers must call ib_dispatch_event() to dispatch the | |
613 | * event to all registered event handlers when an asynchronous event | |
614 | * occurs. | |
615 | */ | |
616 | void ib_dispatch_event(struct ib_event *event) | |
617 | { | |
618 | unsigned long flags; | |
619 | struct ib_event_handler *handler; | |
620 | ||
621 | spin_lock_irqsave(&event->device->event_handler_lock, flags); | |
622 | ||
623 | list_for_each_entry(handler, &event->device->event_handler_list, list) | |
624 | handler->handler(handler, event); | |
625 | ||
626 | spin_unlock_irqrestore(&event->device->event_handler_lock, flags); | |
627 | } | |
628 | EXPORT_SYMBOL(ib_dispatch_event); | |
629 | ||
630 | /** | |
631 | * ib_query_device - Query IB device attributes | |
632 | * @device:Device to query | |
633 | * @device_attr:Device attributes | |
634 | * | |
635 | * ib_query_device() returns the attributes of a device through the | |
636 | * @device_attr pointer. | |
637 | */ | |
638 | int ib_query_device(struct ib_device *device, | |
639 | struct ib_device_attr *device_attr) | |
640 | { | |
2528e33e MB |
641 | struct ib_udata uhw = {.outlen = 0, .inlen = 0}; |
642 | ||
24306dc6 MB |
643 | memset(device_attr, 0, sizeof(*device_attr)); |
644 | ||
2528e33e | 645 | return device->query_device(device, device_attr, &uhw); |
1da177e4 LT |
646 | } |
647 | EXPORT_SYMBOL(ib_query_device); | |
648 | ||
649 | /** | |
650 | * ib_query_port - Query IB port attributes | |
651 | * @device:Device to query | |
652 | * @port_num:Port number to query | |
653 | * @port_attr:Port attributes | |
654 | * | |
655 | * ib_query_port() returns the attributes of a port through the | |
656 | * @port_attr pointer. | |
657 | */ | |
658 | int ib_query_port(struct ib_device *device, | |
659 | u8 port_num, | |
660 | struct ib_port_attr *port_attr) | |
661 | { | |
0cf18d77 | 662 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
116c0074 RD |
663 | return -EINVAL; |
664 | ||
1da177e4 LT |
665 | return device->query_port(device, port_num, port_attr); |
666 | } | |
667 | EXPORT_SYMBOL(ib_query_port); | |
668 | ||
669 | /** | |
670 | * ib_query_gid - Get GID table entry | |
671 | * @device:Device to query | |
672 | * @port_num:Port number to query | |
673 | * @index:GID table index to query | |
674 | * @gid:Returned GID | |
55ee3ab2 MB |
675 | * @attr: Returned GID attributes related to this GID index (only in RoCE). |
676 | * NULL means ignore. | |
1da177e4 LT |
677 | * |
678 | * ib_query_gid() fetches the specified GID table entry. | |
679 | */ | |
680 | int ib_query_gid(struct ib_device *device, | |
55ee3ab2 MB |
681 | u8 port_num, int index, union ib_gid *gid, |
682 | struct ib_gid_attr *attr) | |
1da177e4 | 683 | { |
03db3a2d | 684 | if (rdma_cap_roce_gid_table(device, port_num)) |
55ee3ab2 MB |
685 | return ib_get_cached_gid(device, port_num, index, gid, attr); |
686 | ||
687 | if (attr) | |
688 | return -EINVAL; | |
03db3a2d | 689 | |
1da177e4 LT |
690 | return device->query_gid(device, port_num, index, gid); |
691 | } | |
692 | EXPORT_SYMBOL(ib_query_gid); | |
693 | ||
03db3a2d MB |
694 | /** |
695 | * ib_enum_roce_netdev - enumerate all RoCE ports | |
696 | * @ib_dev : IB device we want to query | |
697 | * @filter: Should we call the callback? | |
698 | * @filter_cookie: Cookie passed to filter | |
699 | * @cb: Callback to call for each found RoCE ports | |
700 | * @cookie: Cookie passed back to the callback | |
701 | * | |
702 | * Enumerates all of the physical RoCE ports of ib_dev | |
703 | * which are related to netdevice and calls callback() on each | |
704 | * device for which filter() function returns non zero. | |
705 | */ | |
706 | void ib_enum_roce_netdev(struct ib_device *ib_dev, | |
707 | roce_netdev_filter filter, | |
708 | void *filter_cookie, | |
709 | roce_netdev_callback cb, | |
710 | void *cookie) | |
711 | { | |
712 | u8 port; | |
713 | ||
714 | for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev); | |
715 | port++) | |
716 | if (rdma_protocol_roce(ib_dev, port)) { | |
717 | struct net_device *idev = NULL; | |
718 | ||
719 | if (ib_dev->get_netdev) | |
720 | idev = ib_dev->get_netdev(ib_dev, port); | |
721 | ||
722 | if (idev && | |
723 | idev->reg_state >= NETREG_UNREGISTERED) { | |
724 | dev_put(idev); | |
725 | idev = NULL; | |
726 | } | |
727 | ||
728 | if (filter(ib_dev, port, idev, filter_cookie)) | |
729 | cb(ib_dev, port, idev, cookie); | |
730 | ||
731 | if (idev) | |
732 | dev_put(idev); | |
733 | } | |
734 | } | |
735 | ||
736 | /** | |
737 | * ib_enum_all_roce_netdevs - enumerate all RoCE devices | |
738 | * @filter: Should we call the callback? | |
739 | * @filter_cookie: Cookie passed to filter | |
740 | * @cb: Callback to call for each found RoCE ports | |
741 | * @cookie: Cookie passed back to the callback | |
742 | * | |
743 | * Enumerates all RoCE devices' physical ports which are related | |
744 | * to netdevices and calls callback() on each device for which | |
745 | * filter() function returns non zero. | |
746 | */ | |
747 | void ib_enum_all_roce_netdevs(roce_netdev_filter filter, | |
748 | void *filter_cookie, | |
749 | roce_netdev_callback cb, | |
750 | void *cookie) | |
751 | { | |
752 | struct ib_device *dev; | |
753 | ||
754 | down_read(&lists_rwsem); | |
755 | list_for_each_entry(dev, &device_list, core_list) | |
756 | ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie); | |
757 | up_read(&lists_rwsem); | |
758 | } | |
759 | ||
1da177e4 LT |
760 | /** |
761 | * ib_query_pkey - Get P_Key table entry | |
762 | * @device:Device to query | |
763 | * @port_num:Port number to query | |
764 | * @index:P_Key table index to query | |
765 | * @pkey:Returned P_Key | |
766 | * | |
767 | * ib_query_pkey() fetches the specified P_Key table entry. | |
768 | */ | |
769 | int ib_query_pkey(struct ib_device *device, | |
770 | u8 port_num, u16 index, u16 *pkey) | |
771 | { | |
772 | return device->query_pkey(device, port_num, index, pkey); | |
773 | } | |
774 | EXPORT_SYMBOL(ib_query_pkey); | |
775 | ||
776 | /** | |
777 | * ib_modify_device - Change IB device attributes | |
778 | * @device:Device to modify | |
779 | * @device_modify_mask:Mask of attributes to change | |
780 | * @device_modify:New attribute values | |
781 | * | |
782 | * ib_modify_device() changes a device's attributes as specified by | |
783 | * the @device_modify_mask and @device_modify structure. | |
784 | */ | |
785 | int ib_modify_device(struct ib_device *device, | |
786 | int device_modify_mask, | |
787 | struct ib_device_modify *device_modify) | |
788 | { | |
10e1b54b BVA |
789 | if (!device->modify_device) |
790 | return -ENOSYS; | |
791 | ||
1da177e4 LT |
792 | return device->modify_device(device, device_modify_mask, |
793 | device_modify); | |
794 | } | |
795 | EXPORT_SYMBOL(ib_modify_device); | |
796 | ||
797 | /** | |
798 | * ib_modify_port - Modifies the attributes for the specified port. | |
799 | * @device: The device to modify. | |
800 | * @port_num: The number of the port to modify. | |
801 | * @port_modify_mask: Mask used to specify which attributes of the port | |
802 | * to change. | |
803 | * @port_modify: New attribute values for the port. | |
804 | * | |
805 | * ib_modify_port() changes a port's attributes as specified by the | |
806 | * @port_modify_mask and @port_modify structure. | |
807 | */ | |
808 | int ib_modify_port(struct ib_device *device, | |
809 | u8 port_num, int port_modify_mask, | |
810 | struct ib_port_modify *port_modify) | |
811 | { | |
10e1b54b BVA |
812 | if (!device->modify_port) |
813 | return -ENOSYS; | |
814 | ||
0cf18d77 | 815 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
116c0074 RD |
816 | return -EINVAL; |
817 | ||
1da177e4 LT |
818 | return device->modify_port(device, port_num, port_modify_mask, |
819 | port_modify); | |
820 | } | |
821 | EXPORT_SYMBOL(ib_modify_port); | |
822 | ||
5eb620c8 YE |
823 | /** |
824 | * ib_find_gid - Returns the port number and GID table index where | |
825 | * a specified GID value occurs. | |
826 | * @device: The device to query. | |
827 | * @gid: The GID value to search for. | |
55ee3ab2 | 828 | * @ndev: The ndev related to the GID to search for. |
5eb620c8 YE |
829 | * @port_num: The port number of the device where the GID value was found. |
830 | * @index: The index into the GID table where the GID was found. This | |
831 | * parameter may be NULL. | |
832 | */ | |
833 | int ib_find_gid(struct ib_device *device, union ib_gid *gid, | |
55ee3ab2 | 834 | struct net_device *ndev, u8 *port_num, u16 *index) |
5eb620c8 YE |
835 | { |
836 | union ib_gid tmp_gid; | |
837 | int ret, port, i; | |
838 | ||
0cf18d77 | 839 | for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { |
03db3a2d | 840 | if (rdma_cap_roce_gid_table(device, port)) { |
d300ec52 MB |
841 | if (!ib_find_cached_gid_by_port(device, gid, port, |
842 | ndev, index)) { | |
03db3a2d MB |
843 | *port_num = port; |
844 | return 0; | |
98d25afa | 845 | } |
03db3a2d MB |
846 | } |
847 | ||
7738613e | 848 | for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { |
55ee3ab2 | 849 | ret = ib_query_gid(device, port, i, &tmp_gid, NULL); |
5eb620c8 YE |
850 | if (ret) |
851 | return ret; | |
852 | if (!memcmp(&tmp_gid, gid, sizeof *gid)) { | |
853 | *port_num = port; | |
854 | if (index) | |
855 | *index = i; | |
856 | return 0; | |
857 | } | |
858 | } | |
859 | } | |
860 | ||
861 | return -ENOENT; | |
862 | } | |
863 | EXPORT_SYMBOL(ib_find_gid); | |
864 | ||
865 | /** | |
866 | * ib_find_pkey - Returns the PKey table index where a specified | |
867 | * PKey value occurs. | |
868 | * @device: The device to query. | |
869 | * @port_num: The port number of the device to search for the PKey. | |
870 | * @pkey: The PKey value to search for. | |
871 | * @index: The index into the PKey table where the PKey was found. | |
872 | */ | |
873 | int ib_find_pkey(struct ib_device *device, | |
874 | u8 port_num, u16 pkey, u16 *index) | |
875 | { | |
876 | int ret, i; | |
877 | u16 tmp_pkey; | |
ff7166c4 | 878 | int partial_ix = -1; |
5eb620c8 | 879 | |
7738613e | 880 | for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { |
5eb620c8 YE |
881 | ret = ib_query_pkey(device, port_num, i, &tmp_pkey); |
882 | if (ret) | |
883 | return ret; | |
36026ecc | 884 | if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { |
ff7166c4 JM |
885 | /* if there is full-member pkey take it.*/ |
886 | if (tmp_pkey & 0x8000) { | |
887 | *index = i; | |
888 | return 0; | |
889 | } | |
890 | if (partial_ix < 0) | |
891 | partial_ix = i; | |
5eb620c8 YE |
892 | } |
893 | } | |
894 | ||
ff7166c4 JM |
895 | /*no full-member, if exists take the limited*/ |
896 | if (partial_ix >= 0) { | |
897 | *index = partial_ix; | |
898 | return 0; | |
899 | } | |
5eb620c8 YE |
900 | return -ENOENT; |
901 | } | |
902 | EXPORT_SYMBOL(ib_find_pkey); | |
903 | ||
9268f72d YK |
904 | /** |
905 | * ib_get_net_dev_by_params() - Return the appropriate net_dev | |
906 | * for a received CM request | |
907 | * @dev: An RDMA device on which the request has been received. | |
908 | * @port: Port number on the RDMA device. | |
909 | * @pkey: The Pkey the request came on. | |
910 | * @gid: A GID that the net_dev uses to communicate. | |
911 | * @addr: Contains the IP address that the request specified as its | |
912 | * destination. | |
913 | */ | |
914 | struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, | |
915 | u8 port, | |
916 | u16 pkey, | |
917 | const union ib_gid *gid, | |
918 | const struct sockaddr *addr) | |
919 | { | |
920 | struct net_device *net_dev = NULL; | |
921 | struct ib_client_data *context; | |
922 | ||
923 | if (!rdma_protocol_ib(dev, port)) | |
924 | return NULL; | |
925 | ||
926 | down_read(&lists_rwsem); | |
927 | ||
928 | list_for_each_entry(context, &dev->client_data_list, list) { | |
929 | struct ib_client *client = context->client; | |
930 | ||
931 | if (context->going_down) | |
932 | continue; | |
933 | ||
934 | if (client->get_net_dev_by_params) { | |
935 | net_dev = client->get_net_dev_by_params(dev, port, pkey, | |
936 | gid, addr, | |
937 | context->data); | |
938 | if (net_dev) | |
939 | break; | |
940 | } | |
941 | } | |
942 | ||
943 | up_read(&lists_rwsem); | |
944 | ||
945 | return net_dev; | |
946 | } | |
947 | EXPORT_SYMBOL(ib_get_net_dev_by_params); | |
948 | ||
1da177e4 LT |
949 | static int __init ib_core_init(void) |
950 | { | |
951 | int ret; | |
952 | ||
f0626710 TH |
953 | ib_wq = alloc_workqueue("infiniband", 0, 0); |
954 | if (!ib_wq) | |
955 | return -ENOMEM; | |
956 | ||
55aeed06 | 957 | ret = class_register(&ib_class); |
fd75c789 | 958 | if (ret) { |
1da177e4 | 959 | printk(KERN_WARNING "Couldn't create InfiniBand device class\n"); |
fd75c789 NM |
960 | goto err; |
961 | } | |
1da177e4 | 962 | |
b2cbae2c RD |
963 | ret = ibnl_init(); |
964 | if (ret) { | |
965 | printk(KERN_WARNING "Couldn't init IB netlink interface\n"); | |
966 | goto err_sysfs; | |
967 | } | |
968 | ||
03db3a2d | 969 | ib_cache_setup(); |
1da177e4 | 970 | |
fd75c789 NM |
971 | return 0; |
972 | ||
973 | err_sysfs: | |
55aeed06 | 974 | class_unregister(&ib_class); |
fd75c789 NM |
975 | |
976 | err: | |
977 | destroy_workqueue(ib_wq); | |
1da177e4 LT |
978 | return ret; |
979 | } | |
980 | ||
981 | static void __exit ib_core_cleanup(void) | |
982 | { | |
983 | ib_cache_cleanup(); | |
b2cbae2c | 984 | ibnl_cleanup(); |
55aeed06 | 985 | class_unregister(&ib_class); |
f7c6a7b5 | 986 | /* Make sure that any pending umem accounting work is done. */ |
f0626710 | 987 | destroy_workqueue(ib_wq); |
1da177e4 LT |
988 | } |
989 | ||
990 | module_init(ib_core_init); | |
991 | module_exit(ib_core_cleanup); |