Commit | Line | Data |
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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> |
8f408ab6 DJ |
42 | #include <linux/security.h> |
43 | #include <linux/notifier.h> | |
b2cbae2c | 44 | #include <rdma/rdma_netlink.h> |
03db3a2d MB |
45 | #include <rdma/ib_addr.h> |
46 | #include <rdma/ib_cache.h> | |
1da177e4 LT |
47 | |
48 | #include "core_priv.h" | |
49 | ||
50 | MODULE_AUTHOR("Roland Dreier"); | |
51 | MODULE_DESCRIPTION("core kernel InfiniBand API"); | |
52 | MODULE_LICENSE("Dual BSD/GPL"); | |
53 | ||
54 | struct ib_client_data { | |
55 | struct list_head list; | |
56 | struct ib_client *client; | |
57 | void * data; | |
7c1eb45a HE |
58 | /* The device or client is going down. Do not call client or device |
59 | * callbacks other than remove(). */ | |
60 | bool going_down; | |
1da177e4 LT |
61 | }; |
62 | ||
14d3a3b2 | 63 | struct workqueue_struct *ib_comp_wq; |
f794809a | 64 | struct workqueue_struct *ib_comp_unbound_wq; |
f0626710 TH |
65 | struct workqueue_struct *ib_wq; |
66 | EXPORT_SYMBOL_GPL(ib_wq); | |
67 | ||
5aa44bb9 HE |
68 | /* The device_list and client_list contain devices and clients after their |
69 | * registration has completed, and the devices and clients are removed | |
70 | * during unregistration. */ | |
1da177e4 LT |
71 | static LIST_HEAD(device_list); |
72 | static LIST_HEAD(client_list); | |
73 | ||
74 | /* | |
5aa44bb9 HE |
75 | * device_mutex and lists_rwsem protect access to both device_list and |
76 | * client_list. device_mutex protects writer access by device and client | |
77 | * registration / de-registration. lists_rwsem protects reader access to | |
78 | * these lists. Iterators of these lists must lock it for read, while updates | |
79 | * to the lists must be done with a write lock. A special case is when the | |
80 | * device_mutex is locked. In this case locking the lists for read access is | |
81 | * not necessary as the device_mutex implies it. | |
7c1eb45a HE |
82 | * |
83 | * lists_rwsem also protects access to the client data list. | |
1da177e4 | 84 | */ |
95ed644f | 85 | static DEFINE_MUTEX(device_mutex); |
5aa44bb9 HE |
86 | static DECLARE_RWSEM(lists_rwsem); |
87 | ||
8f408ab6 DJ |
88 | static int ib_security_change(struct notifier_block *nb, unsigned long event, |
89 | void *lsm_data); | |
90 | static void ib_policy_change_task(struct work_struct *work); | |
91 | static DECLARE_WORK(ib_policy_change_work, ib_policy_change_task); | |
92 | ||
93 | static struct notifier_block ibdev_lsm_nb = { | |
94 | .notifier_call = ib_security_change, | |
95 | }; | |
1da177e4 LT |
96 | |
97 | static int ib_device_check_mandatory(struct ib_device *device) | |
98 | { | |
99 | #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } | |
100 | static const struct { | |
101 | size_t offset; | |
102 | char *name; | |
103 | } mandatory_table[] = { | |
104 | IB_MANDATORY_FUNC(query_device), | |
105 | IB_MANDATORY_FUNC(query_port), | |
106 | IB_MANDATORY_FUNC(query_pkey), | |
1da177e4 LT |
107 | IB_MANDATORY_FUNC(alloc_pd), |
108 | IB_MANDATORY_FUNC(dealloc_pd), | |
1da177e4 LT |
109 | IB_MANDATORY_FUNC(create_qp), |
110 | IB_MANDATORY_FUNC(modify_qp), | |
111 | IB_MANDATORY_FUNC(destroy_qp), | |
112 | IB_MANDATORY_FUNC(post_send), | |
113 | IB_MANDATORY_FUNC(post_recv), | |
114 | IB_MANDATORY_FUNC(create_cq), | |
115 | IB_MANDATORY_FUNC(destroy_cq), | |
116 | IB_MANDATORY_FUNC(poll_cq), | |
117 | IB_MANDATORY_FUNC(req_notify_cq), | |
118 | IB_MANDATORY_FUNC(get_dma_mr), | |
7738613e IW |
119 | IB_MANDATORY_FUNC(dereg_mr), |
120 | IB_MANDATORY_FUNC(get_port_immutable) | |
1da177e4 LT |
121 | }; |
122 | int i; | |
123 | ||
9a6b090c | 124 | for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { |
1da177e4 | 125 | if (!*(void **) ((void *) device + mandatory_table[i].offset)) { |
aba25a3e PP |
126 | pr_warn("Device %s is missing mandatory function %s\n", |
127 | device->name, mandatory_table[i].name); | |
1da177e4 LT |
128 | return -EINVAL; |
129 | } | |
130 | } | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
f8978bd9 | 135 | static struct ib_device *__ib_device_get_by_index(u32 index) |
ecc82c53 LR |
136 | { |
137 | struct ib_device *device; | |
138 | ||
139 | list_for_each_entry(device, &device_list, core_list) | |
140 | if (device->index == index) | |
141 | return device; | |
142 | ||
143 | return NULL; | |
144 | } | |
145 | ||
f8978bd9 LR |
146 | /* |
147 | * Caller is responsible to return refrerence count by calling put_device() | |
148 | */ | |
149 | struct ib_device *ib_device_get_by_index(u32 index) | |
150 | { | |
151 | struct ib_device *device; | |
152 | ||
153 | down_read(&lists_rwsem); | |
154 | device = __ib_device_get_by_index(index); | |
155 | if (device) | |
156 | get_device(&device->dev); | |
157 | ||
158 | up_read(&lists_rwsem); | |
159 | return device; | |
160 | } | |
161 | ||
1da177e4 LT |
162 | static struct ib_device *__ib_device_get_by_name(const char *name) |
163 | { | |
164 | struct ib_device *device; | |
165 | ||
166 | list_for_each_entry(device, &device_list, core_list) | |
167 | if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) | |
168 | return device; | |
169 | ||
170 | return NULL; | |
171 | } | |
172 | ||
1da177e4 LT |
173 | static int alloc_name(char *name) |
174 | { | |
65d470b3 | 175 | unsigned long *inuse; |
1da177e4 LT |
176 | char buf[IB_DEVICE_NAME_MAX]; |
177 | struct ib_device *device; | |
178 | int i; | |
179 | ||
65d470b3 | 180 | inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
181 | if (!inuse) |
182 | return -ENOMEM; | |
183 | ||
184 | list_for_each_entry(device, &device_list, core_list) { | |
185 | if (!sscanf(device->name, name, &i)) | |
186 | continue; | |
187 | if (i < 0 || i >= PAGE_SIZE * 8) | |
188 | continue; | |
189 | snprintf(buf, sizeof buf, name, i); | |
190 | if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) | |
191 | set_bit(i, inuse); | |
192 | } | |
193 | ||
194 | i = find_first_zero_bit(inuse, PAGE_SIZE * 8); | |
195 | free_page((unsigned long) inuse); | |
196 | snprintf(buf, sizeof buf, name, i); | |
197 | ||
198 | if (__ib_device_get_by_name(buf)) | |
199 | return -ENFILE; | |
200 | ||
201 | strlcpy(name, buf, IB_DEVICE_NAME_MAX); | |
202 | return 0; | |
203 | } | |
204 | ||
55aeed06 JG |
205 | static void ib_device_release(struct device *device) |
206 | { | |
207 | struct ib_device *dev = container_of(device, struct ib_device, dev); | |
208 | ||
4be3a4fa PP |
209 | WARN_ON(dev->reg_state == IB_DEV_REGISTERED); |
210 | if (dev->reg_state == IB_DEV_UNREGISTERED) { | |
211 | /* | |
212 | * In IB_DEV_UNINITIALIZED state, cache or port table | |
213 | * is not even created. Free cache and port table only when | |
214 | * device reaches UNREGISTERED state. | |
215 | */ | |
216 | ib_cache_release_one(dev); | |
217 | kfree(dev->port_immutable); | |
218 | } | |
55aeed06 JG |
219 | kfree(dev); |
220 | } | |
221 | ||
222 | static int ib_device_uevent(struct device *device, | |
223 | struct kobj_uevent_env *env) | |
224 | { | |
225 | struct ib_device *dev = container_of(device, struct ib_device, dev); | |
226 | ||
227 | if (add_uevent_var(env, "NAME=%s", dev->name)) | |
228 | return -ENOMEM; | |
229 | ||
230 | /* | |
231 | * It would be nice to pass the node GUID with the event... | |
232 | */ | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static struct class ib_class = { | |
238 | .name = "infiniband", | |
239 | .dev_release = ib_device_release, | |
240 | .dev_uevent = ib_device_uevent, | |
241 | }; | |
242 | ||
1da177e4 LT |
243 | /** |
244 | * ib_alloc_device - allocate an IB device struct | |
245 | * @size:size of structure to allocate | |
246 | * | |
247 | * Low-level drivers should use ib_alloc_device() to allocate &struct | |
248 | * ib_device. @size is the size of the structure to be allocated, | |
249 | * including any private data used by the low-level driver. | |
250 | * ib_dealloc_device() must be used to free structures allocated with | |
251 | * ib_alloc_device(). | |
252 | */ | |
253 | struct ib_device *ib_alloc_device(size_t size) | |
254 | { | |
55aeed06 JG |
255 | struct ib_device *device; |
256 | ||
257 | if (WARN_ON(size < sizeof(struct ib_device))) | |
258 | return NULL; | |
259 | ||
260 | device = kzalloc(size, GFP_KERNEL); | |
261 | if (!device) | |
262 | return NULL; | |
263 | ||
02d8883f LR |
264 | rdma_restrack_init(&device->res); |
265 | ||
55aeed06 JG |
266 | device->dev.class = &ib_class; |
267 | device_initialize(&device->dev); | |
268 | ||
269 | dev_set_drvdata(&device->dev, device); | |
270 | ||
271 | INIT_LIST_HEAD(&device->event_handler_list); | |
272 | spin_lock_init(&device->event_handler_lock); | |
e1f540c3 | 273 | rwlock_init(&device->client_data_lock); |
55aeed06 JG |
274 | INIT_LIST_HEAD(&device->client_data_list); |
275 | INIT_LIST_HEAD(&device->port_list); | |
1da177e4 | 276 | |
55aeed06 | 277 | return device; |
1da177e4 LT |
278 | } |
279 | EXPORT_SYMBOL(ib_alloc_device); | |
280 | ||
281 | /** | |
282 | * ib_dealloc_device - free an IB device struct | |
283 | * @device:structure to free | |
284 | * | |
285 | * Free a structure allocated with ib_alloc_device(). | |
286 | */ | |
287 | void ib_dealloc_device(struct ib_device *device) | |
288 | { | |
4512acd0 | 289 | WARN_ON(!list_empty(&device->client_data_list)); |
55aeed06 JG |
290 | WARN_ON(device->reg_state != IB_DEV_UNREGISTERED && |
291 | device->reg_state != IB_DEV_UNINITIALIZED); | |
103140ec | 292 | rdma_restrack_clean(&device->res); |
924b8900 | 293 | put_device(&device->dev); |
1da177e4 LT |
294 | } |
295 | EXPORT_SYMBOL(ib_dealloc_device); | |
296 | ||
297 | static int add_client_context(struct ib_device *device, struct ib_client *client) | |
298 | { | |
299 | struct ib_client_data *context; | |
1da177e4 | 300 | |
2d65f49f | 301 | context = kmalloc(sizeof(*context), GFP_KERNEL); |
a0b3455f | 302 | if (!context) |
1da177e4 | 303 | return -ENOMEM; |
1da177e4 LT |
304 | |
305 | context->client = client; | |
306 | context->data = NULL; | |
7c1eb45a | 307 | context->going_down = false; |
1da177e4 | 308 | |
7c1eb45a | 309 | down_write(&lists_rwsem); |
e1f540c3 | 310 | write_lock_irq(&device->client_data_lock); |
1da177e4 | 311 | list_add(&context->list, &device->client_data_list); |
e1f540c3 | 312 | write_unlock_irq(&device->client_data_lock); |
7c1eb45a | 313 | up_write(&lists_rwsem); |
1da177e4 LT |
314 | |
315 | return 0; | |
316 | } | |
317 | ||
337877a4 IW |
318 | static int verify_immutable(const struct ib_device *dev, u8 port) |
319 | { | |
320 | return WARN_ON(!rdma_cap_ib_mad(dev, port) && | |
321 | rdma_max_mad_size(dev, port) != 0); | |
322 | } | |
323 | ||
7738613e | 324 | static int read_port_immutable(struct ib_device *device) |
5eb620c8 | 325 | { |
55aeed06 | 326 | int ret; |
7738613e IW |
327 | u8 start_port = rdma_start_port(device); |
328 | u8 end_port = rdma_end_port(device); | |
329 | u8 port; | |
330 | ||
331 | /** | |
332 | * device->port_immutable is indexed directly by the port number to make | |
333 | * access to this data as efficient as possible. | |
334 | * | |
335 | * Therefore port_immutable is declared as a 1 based array with | |
336 | * potential empty slots at the beginning. | |
337 | */ | |
6396bb22 KC |
338 | device->port_immutable = kcalloc(end_port + 1, |
339 | sizeof(*device->port_immutable), | |
7738613e IW |
340 | GFP_KERNEL); |
341 | if (!device->port_immutable) | |
55aeed06 | 342 | return -ENOMEM; |
5eb620c8 | 343 | |
7738613e IW |
344 | for (port = start_port; port <= end_port; ++port) { |
345 | ret = device->get_port_immutable(device, port, | |
346 | &device->port_immutable[port]); | |
5eb620c8 | 347 | if (ret) |
55aeed06 | 348 | return ret; |
337877a4 | 349 | |
55aeed06 JG |
350 | if (verify_immutable(device, port)) |
351 | return -EINVAL; | |
5eb620c8 | 352 | } |
55aeed06 | 353 | return 0; |
5eb620c8 YE |
354 | } |
355 | ||
9abb0d1b | 356 | void ib_get_device_fw_str(struct ib_device *dev, char *str) |
5fa76c20 IW |
357 | { |
358 | if (dev->get_dev_fw_str) | |
9abb0d1b | 359 | dev->get_dev_fw_str(dev, str); |
5fa76c20 IW |
360 | else |
361 | str[0] = '\0'; | |
362 | } | |
363 | EXPORT_SYMBOL(ib_get_device_fw_str); | |
364 | ||
d291f1a6 DJ |
365 | static int setup_port_pkey_list(struct ib_device *device) |
366 | { | |
367 | int i; | |
368 | ||
369 | /** | |
370 | * device->port_pkey_list is indexed directly by the port number, | |
371 | * Therefore it is declared as a 1 based array with potential empty | |
372 | * slots at the beginning. | |
373 | */ | |
374 | device->port_pkey_list = kcalloc(rdma_end_port(device) + 1, | |
375 | sizeof(*device->port_pkey_list), | |
376 | GFP_KERNEL); | |
377 | ||
378 | if (!device->port_pkey_list) | |
379 | return -ENOMEM; | |
380 | ||
381 | for (i = 0; i < (rdma_end_port(device) + 1); i++) { | |
382 | spin_lock_init(&device->port_pkey_list[i].list_lock); | |
383 | INIT_LIST_HEAD(&device->port_pkey_list[i].pkey_list); | |
384 | } | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
8f408ab6 DJ |
389 | static void ib_policy_change_task(struct work_struct *work) |
390 | { | |
391 | struct ib_device *dev; | |
392 | ||
393 | down_read(&lists_rwsem); | |
394 | list_for_each_entry(dev, &device_list, core_list) { | |
395 | int i; | |
396 | ||
397 | for (i = rdma_start_port(dev); i <= rdma_end_port(dev); i++) { | |
398 | u64 sp; | |
399 | int ret = ib_get_cached_subnet_prefix(dev, | |
400 | i, | |
401 | &sp); | |
402 | ||
403 | WARN_ONCE(ret, | |
404 | "ib_get_cached_subnet_prefix err: %d, this should never happen here\n", | |
405 | ret); | |
a750cfde DJ |
406 | if (!ret) |
407 | ib_security_cache_change(dev, i, sp); | |
8f408ab6 DJ |
408 | } |
409 | } | |
410 | up_read(&lists_rwsem); | |
411 | } | |
412 | ||
413 | static int ib_security_change(struct notifier_block *nb, unsigned long event, | |
414 | void *lsm_data) | |
415 | { | |
416 | if (event != LSM_POLICY_CHANGE) | |
417 | return NOTIFY_DONE; | |
418 | ||
419 | schedule_work(&ib_policy_change_work); | |
420 | ||
421 | return NOTIFY_OK; | |
422 | } | |
423 | ||
ecc82c53 LR |
424 | /** |
425 | * __dev_new_index - allocate an device index | |
426 | * | |
427 | * Returns a suitable unique value for a new device interface | |
428 | * number. It assumes that there are less than 2^32-1 ib devices | |
429 | * will be present in the system. | |
430 | */ | |
431 | static u32 __dev_new_index(void) | |
432 | { | |
433 | /* | |
434 | * The device index to allow stable naming. | |
435 | * Similar to struct net -> ifindex. | |
436 | */ | |
437 | static u32 index; | |
438 | ||
439 | for (;;) { | |
440 | if (!(++index)) | |
441 | index = 1; | |
442 | ||
443 | if (!__ib_device_get_by_index(index)) | |
444 | return index; | |
445 | } | |
446 | } | |
447 | ||
1da177e4 LT |
448 | /** |
449 | * ib_register_device - Register an IB device with IB core | |
450 | * @device:Device to register | |
451 | * | |
452 | * Low-level drivers use ib_register_device() to register their | |
453 | * devices with the IB core. All registered clients will receive a | |
454 | * callback for each device that is added. @device must be allocated | |
455 | * with ib_alloc_device(). | |
456 | */ | |
9a6edb60 RC |
457 | int ib_register_device(struct ib_device *device, |
458 | int (*port_callback)(struct ib_device *, | |
459 | u8, struct kobject *)) | |
1da177e4 LT |
460 | { |
461 | int ret; | |
b8071ad8 | 462 | struct ib_client *client; |
3e153a93 | 463 | struct ib_udata uhw = {.outlen = 0, .inlen = 0}; |
99db9494 BVA |
464 | struct device *parent = device->dev.parent; |
465 | ||
0957c29f BVA |
466 | WARN_ON_ONCE(device->dma_device); |
467 | if (device->dev.dma_ops) { | |
468 | /* | |
469 | * The caller provided custom DMA operations. Copy the | |
470 | * DMA-related fields that are used by e.g. dma_alloc_coherent() | |
471 | * into device->dev. | |
472 | */ | |
473 | device->dma_device = &device->dev; | |
02ee9da3 BVA |
474 | if (!device->dev.dma_mask) { |
475 | if (parent) | |
476 | device->dev.dma_mask = parent->dma_mask; | |
477 | else | |
478 | WARN_ON_ONCE(true); | |
479 | } | |
480 | if (!device->dev.coherent_dma_mask) { | |
481 | if (parent) | |
482 | device->dev.coherent_dma_mask = | |
483 | parent->coherent_dma_mask; | |
484 | else | |
485 | WARN_ON_ONCE(true); | |
486 | } | |
0957c29f BVA |
487 | } else { |
488 | /* | |
489 | * The caller did not provide custom DMA operations. Use the | |
490 | * DMA mapping operations of the parent device. | |
491 | */ | |
02ee9da3 | 492 | WARN_ON_ONCE(!parent); |
0957c29f BVA |
493 | device->dma_device = parent; |
494 | } | |
1da177e4 | 495 | |
95ed644f | 496 | mutex_lock(&device_mutex); |
1da177e4 LT |
497 | |
498 | if (strchr(device->name, '%')) { | |
499 | ret = alloc_name(device->name); | |
500 | if (ret) | |
501 | goto out; | |
502 | } | |
503 | ||
504 | if (ib_device_check_mandatory(device)) { | |
505 | ret = -EINVAL; | |
506 | goto out; | |
507 | } | |
508 | ||
7738613e | 509 | ret = read_port_immutable(device); |
5eb620c8 | 510 | if (ret) { |
aba25a3e PP |
511 | pr_warn("Couldn't create per port immutable data %s\n", |
512 | device->name); | |
5eb620c8 YE |
513 | goto out; |
514 | } | |
515 | ||
d291f1a6 DJ |
516 | ret = setup_port_pkey_list(device); |
517 | if (ret) { | |
518 | pr_warn("Couldn't create per port_pkey_list\n"); | |
519 | goto out; | |
520 | } | |
521 | ||
03db3a2d MB |
522 | ret = ib_cache_setup_one(device); |
523 | if (ret) { | |
aba25a3e | 524 | pr_warn("Couldn't set up InfiniBand P_Key/GID cache\n"); |
4be3a4fa | 525 | goto port_cleanup; |
03db3a2d MB |
526 | } |
527 | ||
43579b5f PP |
528 | ret = ib_device_register_rdmacg(device); |
529 | if (ret) { | |
530 | pr_warn("Couldn't register device with rdma cgroup\n"); | |
4be3a4fa | 531 | goto cache_cleanup; |
43579b5f PP |
532 | } |
533 | ||
3e153a93 IW |
534 | memset(&device->attrs, 0, sizeof(device->attrs)); |
535 | ret = device->query_device(device, &device->attrs, &uhw); | |
536 | if (ret) { | |
aba25a3e | 537 | pr_warn("Couldn't query the device attributes\n"); |
2fb4f4ea | 538 | goto cg_cleanup; |
3e153a93 IW |
539 | } |
540 | ||
9a6edb60 | 541 | ret = ib_device_register_sysfs(device, port_callback); |
1da177e4 | 542 | if (ret) { |
aba25a3e PP |
543 | pr_warn("Couldn't register device %s with driver model\n", |
544 | device->name); | |
2fb4f4ea | 545 | goto cg_cleanup; |
1da177e4 LT |
546 | } |
547 | ||
1da177e4 LT |
548 | device->reg_state = IB_DEV_REGISTERED; |
549 | ||
b8071ad8 | 550 | list_for_each_entry(client, &client_list, list) |
b059e210 | 551 | if (!add_client_context(device, client) && client->add) |
b8071ad8 | 552 | client->add(device); |
1da177e4 | 553 | |
ecc82c53 | 554 | device->index = __dev_new_index(); |
5aa44bb9 HE |
555 | down_write(&lists_rwsem); |
556 | list_add_tail(&device->core_list, &device_list); | |
557 | up_write(&lists_rwsem); | |
4be3a4fa PP |
558 | mutex_unlock(&device_mutex); |
559 | return 0; | |
560 | ||
2fb4f4ea PP |
561 | cg_cleanup: |
562 | ib_device_unregister_rdmacg(device); | |
4be3a4fa PP |
563 | cache_cleanup: |
564 | ib_cache_cleanup_one(device); | |
565 | ib_cache_release_one(device); | |
566 | port_cleanup: | |
567 | kfree(device->port_immutable); | |
5aa44bb9 | 568 | out: |
95ed644f | 569 | mutex_unlock(&device_mutex); |
1da177e4 LT |
570 | return ret; |
571 | } | |
572 | EXPORT_SYMBOL(ib_register_device); | |
573 | ||
574 | /** | |
575 | * ib_unregister_device - Unregister an IB device | |
576 | * @device:Device to unregister | |
577 | * | |
578 | * Unregister an IB device. All clients will receive a remove callback. | |
579 | */ | |
580 | void ib_unregister_device(struct ib_device *device) | |
581 | { | |
1da177e4 LT |
582 | struct ib_client_data *context, *tmp; |
583 | unsigned long flags; | |
584 | ||
95ed644f | 585 | mutex_lock(&device_mutex); |
1da177e4 | 586 | |
5aa44bb9 HE |
587 | down_write(&lists_rwsem); |
588 | list_del(&device->core_list); | |
e1f540c3 | 589 | write_lock_irq(&device->client_data_lock); |
f7b65d9b | 590 | list_for_each_entry(context, &device->client_data_list, list) |
7c1eb45a | 591 | context->going_down = true; |
e1f540c3 | 592 | write_unlock_irq(&device->client_data_lock); |
7c1eb45a | 593 | downgrade_write(&lists_rwsem); |
5aa44bb9 | 594 | |
f7b65d9b | 595 | list_for_each_entry(context, &device->client_data_list, list) { |
7c1eb45a HE |
596 | if (context->client->remove) |
597 | context->client->remove(device, context->data); | |
598 | } | |
599 | up_read(&lists_rwsem); | |
1da177e4 | 600 | |
43579b5f | 601 | ib_device_unregister_rdmacg(device); |
9206dff1 | 602 | ib_device_unregister_sysfs(device); |
06f8174a SS |
603 | |
604 | mutex_unlock(&device_mutex); | |
605 | ||
03db3a2d | 606 | ib_cache_cleanup_one(device); |
9206dff1 | 607 | |
d291f1a6 DJ |
608 | ib_security_destroy_port_pkey_list(device); |
609 | kfree(device->port_pkey_list); | |
610 | ||
7c1eb45a | 611 | down_write(&lists_rwsem); |
e1f540c3 | 612 | write_lock_irqsave(&device->client_data_lock, flags); |
4512acd0 PP |
613 | list_for_each_entry_safe(context, tmp, &device->client_data_list, |
614 | list) { | |
615 | list_del(&context->list); | |
1da177e4 | 616 | kfree(context); |
4512acd0 | 617 | } |
e1f540c3 | 618 | write_unlock_irqrestore(&device->client_data_lock, flags); |
7c1eb45a | 619 | up_write(&lists_rwsem); |
1da177e4 LT |
620 | |
621 | device->reg_state = IB_DEV_UNREGISTERED; | |
622 | } | |
623 | EXPORT_SYMBOL(ib_unregister_device); | |
624 | ||
625 | /** | |
626 | * ib_register_client - Register an IB client | |
627 | * @client:Client to register | |
628 | * | |
629 | * Upper level users of the IB drivers can use ib_register_client() to | |
630 | * register callbacks for IB device addition and removal. When an IB | |
631 | * device is added, each registered client's add method will be called | |
632 | * (in the order the clients were registered), and when a device is | |
633 | * removed, each client's remove method will be called (in the reverse | |
634 | * order that clients were registered). In addition, when | |
635 | * ib_register_client() is called, the client will receive an add | |
636 | * callback for all devices already registered. | |
637 | */ | |
638 | int ib_register_client(struct ib_client *client) | |
639 | { | |
640 | struct ib_device *device; | |
641 | ||
95ed644f | 642 | mutex_lock(&device_mutex); |
1da177e4 | 643 | |
1da177e4 | 644 | list_for_each_entry(device, &device_list, core_list) |
b059e210 | 645 | if (!add_client_context(device, client) && client->add) |
1da177e4 LT |
646 | client->add(device); |
647 | ||
5aa44bb9 HE |
648 | down_write(&lists_rwsem); |
649 | list_add_tail(&client->list, &client_list); | |
650 | up_write(&lists_rwsem); | |
651 | ||
95ed644f | 652 | mutex_unlock(&device_mutex); |
1da177e4 LT |
653 | |
654 | return 0; | |
655 | } | |
656 | EXPORT_SYMBOL(ib_register_client); | |
657 | ||
658 | /** | |
659 | * ib_unregister_client - Unregister an IB client | |
660 | * @client:Client to unregister | |
661 | * | |
662 | * Upper level users use ib_unregister_client() to remove their client | |
663 | * registration. When ib_unregister_client() is called, the client | |
664 | * will receive a remove callback for each IB device still registered. | |
665 | */ | |
666 | void ib_unregister_client(struct ib_client *client) | |
667 | { | |
f7b65d9b | 668 | struct ib_client_data *context; |
1da177e4 | 669 | struct ib_device *device; |
1da177e4 | 670 | |
95ed644f | 671 | mutex_lock(&device_mutex); |
1da177e4 | 672 | |
5aa44bb9 HE |
673 | down_write(&lists_rwsem); |
674 | list_del(&client->list); | |
675 | up_write(&lists_rwsem); | |
676 | ||
1da177e4 | 677 | list_for_each_entry(device, &device_list, core_list) { |
7c1eb45a | 678 | struct ib_client_data *found_context = NULL; |
1da177e4 | 679 | |
7c1eb45a | 680 | down_write(&lists_rwsem); |
e1f540c3 | 681 | write_lock_irq(&device->client_data_lock); |
f7b65d9b | 682 | list_for_each_entry(context, &device->client_data_list, list) |
1da177e4 | 683 | if (context->client == client) { |
7c1eb45a HE |
684 | context->going_down = true; |
685 | found_context = context; | |
686 | break; | |
1da177e4 | 687 | } |
e1f540c3 | 688 | write_unlock_irq(&device->client_data_lock); |
7c1eb45a HE |
689 | up_write(&lists_rwsem); |
690 | ||
691 | if (client->remove) | |
692 | client->remove(device, found_context ? | |
693 | found_context->data : NULL); | |
694 | ||
695 | if (!found_context) { | |
696 | pr_warn("No client context found for %s/%s\n", | |
697 | device->name, client->name); | |
698 | continue; | |
699 | } | |
700 | ||
701 | down_write(&lists_rwsem); | |
e1f540c3 | 702 | write_lock_irq(&device->client_data_lock); |
7c1eb45a | 703 | list_del(&found_context->list); |
e1f540c3 | 704 | write_unlock_irq(&device->client_data_lock); |
7c1eb45a | 705 | up_write(&lists_rwsem); |
93688ddb | 706 | kfree(found_context); |
1da177e4 | 707 | } |
1da177e4 | 708 | |
95ed644f | 709 | mutex_unlock(&device_mutex); |
1da177e4 LT |
710 | } |
711 | EXPORT_SYMBOL(ib_unregister_client); | |
712 | ||
713 | /** | |
714 | * ib_get_client_data - Get IB client context | |
715 | * @device:Device to get context for | |
716 | * @client:Client to get context for | |
717 | * | |
718 | * ib_get_client_data() returns client context set with | |
719 | * ib_set_client_data(). | |
720 | */ | |
721 | void *ib_get_client_data(struct ib_device *device, struct ib_client *client) | |
722 | { | |
723 | struct ib_client_data *context; | |
724 | void *ret = NULL; | |
725 | unsigned long flags; | |
726 | ||
e1f540c3 | 727 | read_lock_irqsave(&device->client_data_lock, flags); |
1da177e4 LT |
728 | list_for_each_entry(context, &device->client_data_list, list) |
729 | if (context->client == client) { | |
730 | ret = context->data; | |
731 | break; | |
732 | } | |
e1f540c3 | 733 | read_unlock_irqrestore(&device->client_data_lock, flags); |
1da177e4 LT |
734 | |
735 | return ret; | |
736 | } | |
737 | EXPORT_SYMBOL(ib_get_client_data); | |
738 | ||
739 | /** | |
9cd330d3 | 740 | * ib_set_client_data - Set IB client context |
1da177e4 LT |
741 | * @device:Device to set context for |
742 | * @client:Client to set context for | |
743 | * @data:Context to set | |
744 | * | |
745 | * ib_set_client_data() sets client context that can be retrieved with | |
746 | * ib_get_client_data(). | |
747 | */ | |
748 | void ib_set_client_data(struct ib_device *device, struct ib_client *client, | |
749 | void *data) | |
750 | { | |
751 | struct ib_client_data *context; | |
752 | unsigned long flags; | |
753 | ||
e1f540c3 | 754 | write_lock_irqsave(&device->client_data_lock, flags); |
1da177e4 LT |
755 | list_for_each_entry(context, &device->client_data_list, list) |
756 | if (context->client == client) { | |
757 | context->data = data; | |
758 | goto out; | |
759 | } | |
760 | ||
aba25a3e PP |
761 | pr_warn("No client context found for %s/%s\n", |
762 | device->name, client->name); | |
1da177e4 LT |
763 | |
764 | out: | |
e1f540c3 | 765 | write_unlock_irqrestore(&device->client_data_lock, flags); |
1da177e4 LT |
766 | } |
767 | EXPORT_SYMBOL(ib_set_client_data); | |
768 | ||
769 | /** | |
770 | * ib_register_event_handler - Register an IB event handler | |
771 | * @event_handler:Handler to register | |
772 | * | |
773 | * ib_register_event_handler() registers an event handler that will be | |
774 | * called back when asynchronous IB events occur (as defined in | |
775 | * chapter 11 of the InfiniBand Architecture Specification). This | |
776 | * callback may occur in interrupt context. | |
777 | */ | |
dcc9881e | 778 | void ib_register_event_handler(struct ib_event_handler *event_handler) |
1da177e4 LT |
779 | { |
780 | unsigned long flags; | |
781 | ||
782 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
783 | list_add_tail(&event_handler->list, | |
784 | &event_handler->device->event_handler_list); | |
785 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
1da177e4 LT |
786 | } |
787 | EXPORT_SYMBOL(ib_register_event_handler); | |
788 | ||
789 | /** | |
790 | * ib_unregister_event_handler - Unregister an event handler | |
791 | * @event_handler:Handler to unregister | |
792 | * | |
793 | * Unregister an event handler registered with | |
794 | * ib_register_event_handler(). | |
795 | */ | |
dcc9881e | 796 | void ib_unregister_event_handler(struct ib_event_handler *event_handler) |
1da177e4 LT |
797 | { |
798 | unsigned long flags; | |
799 | ||
800 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
801 | list_del(&event_handler->list); | |
802 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
1da177e4 LT |
803 | } |
804 | EXPORT_SYMBOL(ib_unregister_event_handler); | |
805 | ||
806 | /** | |
807 | * ib_dispatch_event - Dispatch an asynchronous event | |
808 | * @event:Event to dispatch | |
809 | * | |
810 | * Low-level drivers must call ib_dispatch_event() to dispatch the | |
811 | * event to all registered event handlers when an asynchronous event | |
812 | * occurs. | |
813 | */ | |
814 | void ib_dispatch_event(struct ib_event *event) | |
815 | { | |
816 | unsigned long flags; | |
817 | struct ib_event_handler *handler; | |
818 | ||
819 | spin_lock_irqsave(&event->device->event_handler_lock, flags); | |
820 | ||
821 | list_for_each_entry(handler, &event->device->event_handler_list, list) | |
822 | handler->handler(handler, event); | |
823 | ||
824 | spin_unlock_irqrestore(&event->device->event_handler_lock, flags); | |
825 | } | |
826 | EXPORT_SYMBOL(ib_dispatch_event); | |
827 | ||
1da177e4 LT |
828 | /** |
829 | * ib_query_port - Query IB port attributes | |
830 | * @device:Device to query | |
831 | * @port_num:Port number to query | |
832 | * @port_attr:Port attributes | |
833 | * | |
834 | * ib_query_port() returns the attributes of a port through the | |
835 | * @port_attr pointer. | |
836 | */ | |
837 | int ib_query_port(struct ib_device *device, | |
838 | u8 port_num, | |
839 | struct ib_port_attr *port_attr) | |
840 | { | |
fad61ad4 EC |
841 | union ib_gid gid; |
842 | int err; | |
843 | ||
24dc831b | 844 | if (!rdma_is_port_valid(device, port_num)) |
116c0074 RD |
845 | return -EINVAL; |
846 | ||
fad61ad4 EC |
847 | memset(port_attr, 0, sizeof(*port_attr)); |
848 | err = device->query_port(device, port_num, port_attr); | |
849 | if (err || port_attr->subnet_prefix) | |
850 | return err; | |
851 | ||
d7012467 EC |
852 | if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND) |
853 | return 0; | |
854 | ||
f35faa4b | 855 | err = device->query_gid(device, port_num, 0, &gid); |
fad61ad4 EC |
856 | if (err) |
857 | return err; | |
858 | ||
859 | port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix); | |
860 | return 0; | |
1da177e4 LT |
861 | } |
862 | EXPORT_SYMBOL(ib_query_port); | |
863 | ||
03db3a2d MB |
864 | /** |
865 | * ib_enum_roce_netdev - enumerate all RoCE ports | |
866 | * @ib_dev : IB device we want to query | |
867 | * @filter: Should we call the callback? | |
868 | * @filter_cookie: Cookie passed to filter | |
869 | * @cb: Callback to call for each found RoCE ports | |
870 | * @cookie: Cookie passed back to the callback | |
871 | * | |
872 | * Enumerates all of the physical RoCE ports of ib_dev | |
873 | * which are related to netdevice and calls callback() on each | |
874 | * device for which filter() function returns non zero. | |
875 | */ | |
876 | void ib_enum_roce_netdev(struct ib_device *ib_dev, | |
877 | roce_netdev_filter filter, | |
878 | void *filter_cookie, | |
879 | roce_netdev_callback cb, | |
880 | void *cookie) | |
881 | { | |
882 | u8 port; | |
883 | ||
884 | for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev); | |
885 | port++) | |
886 | if (rdma_protocol_roce(ib_dev, port)) { | |
887 | struct net_device *idev = NULL; | |
888 | ||
889 | if (ib_dev->get_netdev) | |
890 | idev = ib_dev->get_netdev(ib_dev, port); | |
891 | ||
892 | if (idev && | |
893 | idev->reg_state >= NETREG_UNREGISTERED) { | |
894 | dev_put(idev); | |
895 | idev = NULL; | |
896 | } | |
897 | ||
898 | if (filter(ib_dev, port, idev, filter_cookie)) | |
899 | cb(ib_dev, port, idev, cookie); | |
900 | ||
901 | if (idev) | |
902 | dev_put(idev); | |
903 | } | |
904 | } | |
905 | ||
906 | /** | |
907 | * ib_enum_all_roce_netdevs - enumerate all RoCE devices | |
908 | * @filter: Should we call the callback? | |
909 | * @filter_cookie: Cookie passed to filter | |
910 | * @cb: Callback to call for each found RoCE ports | |
911 | * @cookie: Cookie passed back to the callback | |
912 | * | |
913 | * Enumerates all RoCE devices' physical ports which are related | |
914 | * to netdevices and calls callback() on each device for which | |
915 | * filter() function returns non zero. | |
916 | */ | |
917 | void ib_enum_all_roce_netdevs(roce_netdev_filter filter, | |
918 | void *filter_cookie, | |
919 | roce_netdev_callback cb, | |
920 | void *cookie) | |
921 | { | |
922 | struct ib_device *dev; | |
923 | ||
924 | down_read(&lists_rwsem); | |
925 | list_for_each_entry(dev, &device_list, core_list) | |
926 | ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie); | |
927 | up_read(&lists_rwsem); | |
8030c835 LR |
928 | } |
929 | ||
930 | /** | |
931 | * ib_enum_all_devs - enumerate all ib_devices | |
932 | * @cb: Callback to call for each found ib_device | |
933 | * | |
934 | * Enumerates all ib_devices and calls callback() on each device. | |
935 | */ | |
936 | int ib_enum_all_devs(nldev_callback nldev_cb, struct sk_buff *skb, | |
937 | struct netlink_callback *cb) | |
938 | { | |
939 | struct ib_device *dev; | |
940 | unsigned int idx = 0; | |
941 | int ret = 0; | |
942 | ||
943 | down_read(&lists_rwsem); | |
944 | list_for_each_entry(dev, &device_list, core_list) { | |
945 | ret = nldev_cb(dev, skb, cb, idx); | |
946 | if (ret) | |
947 | break; | |
948 | idx++; | |
949 | } | |
950 | ||
951 | up_read(&lists_rwsem); | |
952 | return ret; | |
03db3a2d MB |
953 | } |
954 | ||
1da177e4 LT |
955 | /** |
956 | * ib_query_pkey - Get P_Key table entry | |
957 | * @device:Device to query | |
958 | * @port_num:Port number to query | |
959 | * @index:P_Key table index to query | |
960 | * @pkey:Returned P_Key | |
961 | * | |
962 | * ib_query_pkey() fetches the specified P_Key table entry. | |
963 | */ | |
964 | int ib_query_pkey(struct ib_device *device, | |
965 | u8 port_num, u16 index, u16 *pkey) | |
966 | { | |
967 | return device->query_pkey(device, port_num, index, pkey); | |
968 | } | |
969 | EXPORT_SYMBOL(ib_query_pkey); | |
970 | ||
971 | /** | |
972 | * ib_modify_device - Change IB device attributes | |
973 | * @device:Device to modify | |
974 | * @device_modify_mask:Mask of attributes to change | |
975 | * @device_modify:New attribute values | |
976 | * | |
977 | * ib_modify_device() changes a device's attributes as specified by | |
978 | * the @device_modify_mask and @device_modify structure. | |
979 | */ | |
980 | int ib_modify_device(struct ib_device *device, | |
981 | int device_modify_mask, | |
982 | struct ib_device_modify *device_modify) | |
983 | { | |
10e1b54b BVA |
984 | if (!device->modify_device) |
985 | return -ENOSYS; | |
986 | ||
1da177e4 LT |
987 | return device->modify_device(device, device_modify_mask, |
988 | device_modify); | |
989 | } | |
990 | EXPORT_SYMBOL(ib_modify_device); | |
991 | ||
992 | /** | |
993 | * ib_modify_port - Modifies the attributes for the specified port. | |
994 | * @device: The device to modify. | |
995 | * @port_num: The number of the port to modify. | |
996 | * @port_modify_mask: Mask used to specify which attributes of the port | |
997 | * to change. | |
998 | * @port_modify: New attribute values for the port. | |
999 | * | |
1000 | * ib_modify_port() changes a port's attributes as specified by the | |
1001 | * @port_modify_mask and @port_modify structure. | |
1002 | */ | |
1003 | int ib_modify_port(struct ib_device *device, | |
1004 | u8 port_num, int port_modify_mask, | |
1005 | struct ib_port_modify *port_modify) | |
1006 | { | |
61e0962d | 1007 | int rc; |
10e1b54b | 1008 | |
24dc831b | 1009 | if (!rdma_is_port_valid(device, port_num)) |
116c0074 RD |
1010 | return -EINVAL; |
1011 | ||
61e0962d SX |
1012 | if (device->modify_port) |
1013 | rc = device->modify_port(device, port_num, port_modify_mask, | |
1014 | port_modify); | |
1015 | else | |
1016 | rc = rdma_protocol_roce(device, port_num) ? 0 : -ENOSYS; | |
1017 | return rc; | |
1da177e4 LT |
1018 | } |
1019 | EXPORT_SYMBOL(ib_modify_port); | |
1020 | ||
5eb620c8 YE |
1021 | /** |
1022 | * ib_find_gid - Returns the port number and GID table index where | |
dbb12562 | 1023 | * a specified GID value occurs. Its searches only for IB link layer. |
5eb620c8 YE |
1024 | * @device: The device to query. |
1025 | * @gid: The GID value to search for. | |
1026 | * @port_num: The port number of the device where the GID value was found. | |
1027 | * @index: The index into the GID table where the GID was found. This | |
1028 | * parameter may be NULL. | |
1029 | */ | |
1030 | int ib_find_gid(struct ib_device *device, union ib_gid *gid, | |
b26c4a11 | 1031 | u8 *port_num, u16 *index) |
5eb620c8 YE |
1032 | { |
1033 | union ib_gid tmp_gid; | |
1034 | int ret, port, i; | |
1035 | ||
0cf18d77 | 1036 | for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { |
22d24f75 | 1037 | if (!rdma_protocol_ib(device, port)) |
b39ffa1d MB |
1038 | continue; |
1039 | ||
7738613e | 1040 | for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { |
1dfce294 | 1041 | ret = rdma_query_gid(device, port, i, &tmp_gid); |
5eb620c8 YE |
1042 | if (ret) |
1043 | return ret; | |
1044 | if (!memcmp(&tmp_gid, gid, sizeof *gid)) { | |
1045 | *port_num = port; | |
1046 | if (index) | |
1047 | *index = i; | |
1048 | return 0; | |
1049 | } | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | return -ENOENT; | |
1054 | } | |
1055 | EXPORT_SYMBOL(ib_find_gid); | |
1056 | ||
1057 | /** | |
1058 | * ib_find_pkey - Returns the PKey table index where a specified | |
1059 | * PKey value occurs. | |
1060 | * @device: The device to query. | |
1061 | * @port_num: The port number of the device to search for the PKey. | |
1062 | * @pkey: The PKey value to search for. | |
1063 | * @index: The index into the PKey table where the PKey was found. | |
1064 | */ | |
1065 | int ib_find_pkey(struct ib_device *device, | |
1066 | u8 port_num, u16 pkey, u16 *index) | |
1067 | { | |
1068 | int ret, i; | |
1069 | u16 tmp_pkey; | |
ff7166c4 | 1070 | int partial_ix = -1; |
5eb620c8 | 1071 | |
7738613e | 1072 | for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { |
5eb620c8 YE |
1073 | ret = ib_query_pkey(device, port_num, i, &tmp_pkey); |
1074 | if (ret) | |
1075 | return ret; | |
36026ecc | 1076 | if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { |
ff7166c4 JM |
1077 | /* if there is full-member pkey take it.*/ |
1078 | if (tmp_pkey & 0x8000) { | |
1079 | *index = i; | |
1080 | return 0; | |
1081 | } | |
1082 | if (partial_ix < 0) | |
1083 | partial_ix = i; | |
5eb620c8 YE |
1084 | } |
1085 | } | |
1086 | ||
ff7166c4 JM |
1087 | /*no full-member, if exists take the limited*/ |
1088 | if (partial_ix >= 0) { | |
1089 | *index = partial_ix; | |
1090 | return 0; | |
1091 | } | |
5eb620c8 YE |
1092 | return -ENOENT; |
1093 | } | |
1094 | EXPORT_SYMBOL(ib_find_pkey); | |
1095 | ||
9268f72d YK |
1096 | /** |
1097 | * ib_get_net_dev_by_params() - Return the appropriate net_dev | |
1098 | * for a received CM request | |
1099 | * @dev: An RDMA device on which the request has been received. | |
1100 | * @port: Port number on the RDMA device. | |
1101 | * @pkey: The Pkey the request came on. | |
1102 | * @gid: A GID that the net_dev uses to communicate. | |
1103 | * @addr: Contains the IP address that the request specified as its | |
1104 | * destination. | |
1105 | */ | |
1106 | struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, | |
1107 | u8 port, | |
1108 | u16 pkey, | |
1109 | const union ib_gid *gid, | |
1110 | const struct sockaddr *addr) | |
1111 | { | |
1112 | struct net_device *net_dev = NULL; | |
1113 | struct ib_client_data *context; | |
1114 | ||
1115 | if (!rdma_protocol_ib(dev, port)) | |
1116 | return NULL; | |
1117 | ||
1118 | down_read(&lists_rwsem); | |
1119 | ||
1120 | list_for_each_entry(context, &dev->client_data_list, list) { | |
1121 | struct ib_client *client = context->client; | |
1122 | ||
1123 | if (context->going_down) | |
1124 | continue; | |
1125 | ||
1126 | if (client->get_net_dev_by_params) { | |
1127 | net_dev = client->get_net_dev_by_params(dev, port, pkey, | |
1128 | gid, addr, | |
1129 | context->data); | |
1130 | if (net_dev) | |
1131 | break; | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | up_read(&lists_rwsem); | |
1136 | ||
1137 | return net_dev; | |
1138 | } | |
1139 | EXPORT_SYMBOL(ib_get_net_dev_by_params); | |
1140 | ||
d0e312fe | 1141 | static const struct rdma_nl_cbs ibnl_ls_cb_table[RDMA_NL_LS_NUM_OPS] = { |
735c631a | 1142 | [RDMA_NL_LS_OP_RESOLVE] = { |
647c75ac | 1143 | .doit = ib_nl_handle_resolve_resp, |
e3a2b93d LR |
1144 | .flags = RDMA_NL_ADMIN_PERM, |
1145 | }, | |
735c631a | 1146 | [RDMA_NL_LS_OP_SET_TIMEOUT] = { |
647c75ac | 1147 | .doit = ib_nl_handle_set_timeout, |
e3a2b93d LR |
1148 | .flags = RDMA_NL_ADMIN_PERM, |
1149 | }, | |
ae43f828 | 1150 | [RDMA_NL_LS_OP_IP_RESOLVE] = { |
647c75ac | 1151 | .doit = ib_nl_handle_ip_res_resp, |
e3a2b93d LR |
1152 | .flags = RDMA_NL_ADMIN_PERM, |
1153 | }, | |
735c631a MB |
1154 | }; |
1155 | ||
1da177e4 LT |
1156 | static int __init ib_core_init(void) |
1157 | { | |
1158 | int ret; | |
1159 | ||
f0626710 TH |
1160 | ib_wq = alloc_workqueue("infiniband", 0, 0); |
1161 | if (!ib_wq) | |
1162 | return -ENOMEM; | |
1163 | ||
14d3a3b2 | 1164 | ib_comp_wq = alloc_workqueue("ib-comp-wq", |
b7363e67 | 1165 | WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, 0); |
14d3a3b2 CH |
1166 | if (!ib_comp_wq) { |
1167 | ret = -ENOMEM; | |
1168 | goto err; | |
1169 | } | |
1170 | ||
f794809a JM |
1171 | ib_comp_unbound_wq = |
1172 | alloc_workqueue("ib-comp-unb-wq", | |
1173 | WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM | | |
1174 | WQ_SYSFS, WQ_UNBOUND_MAX_ACTIVE); | |
1175 | if (!ib_comp_unbound_wq) { | |
1176 | ret = -ENOMEM; | |
1177 | goto err_comp; | |
1178 | } | |
1179 | ||
55aeed06 | 1180 | ret = class_register(&ib_class); |
fd75c789 | 1181 | if (ret) { |
aba25a3e | 1182 | pr_warn("Couldn't create InfiniBand device class\n"); |
f794809a | 1183 | goto err_comp_unbound; |
fd75c789 | 1184 | } |
1da177e4 | 1185 | |
c9901724 | 1186 | ret = rdma_nl_init(); |
b2cbae2c | 1187 | if (ret) { |
c9901724 | 1188 | pr_warn("Couldn't init IB netlink interface: err %d\n", ret); |
b2cbae2c RD |
1189 | goto err_sysfs; |
1190 | } | |
1191 | ||
e3f20f02 LR |
1192 | ret = addr_init(); |
1193 | if (ret) { | |
1194 | pr_warn("Could't init IB address resolution\n"); | |
1195 | goto err_ibnl; | |
1196 | } | |
1197 | ||
4c2cb422 MB |
1198 | ret = ib_mad_init(); |
1199 | if (ret) { | |
1200 | pr_warn("Couldn't init IB MAD\n"); | |
1201 | goto err_addr; | |
1202 | } | |
1203 | ||
c2e49c92 MB |
1204 | ret = ib_sa_init(); |
1205 | if (ret) { | |
1206 | pr_warn("Couldn't init SA\n"); | |
1207 | goto err_mad; | |
1208 | } | |
1209 | ||
8f408ab6 DJ |
1210 | ret = register_lsm_notifier(&ibdev_lsm_nb); |
1211 | if (ret) { | |
1212 | pr_warn("Couldn't register LSM notifier. ret %d\n", ret); | |
c9901724 | 1213 | goto err_sa; |
8f408ab6 DJ |
1214 | } |
1215 | ||
6c80b41a | 1216 | nldev_init(); |
c9901724 | 1217 | rdma_nl_register(RDMA_NL_LS, ibnl_ls_cb_table); |
5ef8c0c1 | 1218 | roce_gid_mgmt_init(); |
1da177e4 | 1219 | |
fd75c789 NM |
1220 | return 0; |
1221 | ||
735c631a MB |
1222 | err_sa: |
1223 | ib_sa_cleanup(); | |
c2e49c92 MB |
1224 | err_mad: |
1225 | ib_mad_cleanup(); | |
4c2cb422 MB |
1226 | err_addr: |
1227 | addr_cleanup(); | |
e3f20f02 | 1228 | err_ibnl: |
c9901724 | 1229 | rdma_nl_exit(); |
fd75c789 | 1230 | err_sysfs: |
55aeed06 | 1231 | class_unregister(&ib_class); |
f794809a JM |
1232 | err_comp_unbound: |
1233 | destroy_workqueue(ib_comp_unbound_wq); | |
14d3a3b2 CH |
1234 | err_comp: |
1235 | destroy_workqueue(ib_comp_wq); | |
fd75c789 NM |
1236 | err: |
1237 | destroy_workqueue(ib_wq); | |
1da177e4 LT |
1238 | return ret; |
1239 | } | |
1240 | ||
1241 | static void __exit ib_core_cleanup(void) | |
1242 | { | |
5ef8c0c1 | 1243 | roce_gid_mgmt_cleanup(); |
6c80b41a | 1244 | nldev_exit(); |
c9901724 LR |
1245 | rdma_nl_unregister(RDMA_NL_LS); |
1246 | unregister_lsm_notifier(&ibdev_lsm_nb); | |
c2e49c92 | 1247 | ib_sa_cleanup(); |
4c2cb422 | 1248 | ib_mad_cleanup(); |
e3f20f02 | 1249 | addr_cleanup(); |
c9901724 | 1250 | rdma_nl_exit(); |
55aeed06 | 1251 | class_unregister(&ib_class); |
f794809a | 1252 | destroy_workqueue(ib_comp_unbound_wq); |
14d3a3b2 | 1253 | destroy_workqueue(ib_comp_wq); |
f7c6a7b5 | 1254 | /* Make sure that any pending umem accounting work is done. */ |
f0626710 | 1255 | destroy_workqueue(ib_wq); |
1da177e4 LT |
1256 | } |
1257 | ||
e3bf14bd JG |
1258 | MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS, 4); |
1259 | ||
a9cd1a67 | 1260 | subsys_initcall(ib_core_init); |
1da177e4 | 1261 | module_exit(ib_core_cleanup); |