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; |
f0626710 TH |
64 | struct workqueue_struct *ib_wq; |
65 | EXPORT_SYMBOL_GPL(ib_wq); | |
66 | ||
5aa44bb9 HE |
67 | /* The device_list and client_list contain devices and clients after their |
68 | * registration has completed, and the devices and clients are removed | |
69 | * during unregistration. */ | |
1da177e4 LT |
70 | static LIST_HEAD(device_list); |
71 | static LIST_HEAD(client_list); | |
72 | ||
73 | /* | |
5aa44bb9 HE |
74 | * device_mutex and lists_rwsem protect access to both device_list and |
75 | * client_list. device_mutex protects writer access by device and client | |
76 | * registration / de-registration. lists_rwsem protects reader access to | |
77 | * these lists. Iterators of these lists must lock it for read, while updates | |
78 | * to the lists must be done with a write lock. A special case is when the | |
79 | * device_mutex is locked. In this case locking the lists for read access is | |
80 | * not necessary as the device_mutex implies it. | |
7c1eb45a HE |
81 | * |
82 | * lists_rwsem also protects access to the client data list. | |
1da177e4 | 83 | */ |
95ed644f | 84 | static DEFINE_MUTEX(device_mutex); |
5aa44bb9 HE |
85 | static DECLARE_RWSEM(lists_rwsem); |
86 | ||
8f408ab6 DJ |
87 | static int ib_security_change(struct notifier_block *nb, unsigned long event, |
88 | void *lsm_data); | |
89 | static void ib_policy_change_task(struct work_struct *work); | |
90 | static DECLARE_WORK(ib_policy_change_work, ib_policy_change_task); | |
91 | ||
92 | static struct notifier_block ibdev_lsm_nb = { | |
93 | .notifier_call = ib_security_change, | |
94 | }; | |
1da177e4 LT |
95 | |
96 | static int ib_device_check_mandatory(struct ib_device *device) | |
97 | { | |
98 | #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } | |
99 | static const struct { | |
100 | size_t offset; | |
101 | char *name; | |
102 | } mandatory_table[] = { | |
103 | IB_MANDATORY_FUNC(query_device), | |
104 | IB_MANDATORY_FUNC(query_port), | |
105 | IB_MANDATORY_FUNC(query_pkey), | |
106 | IB_MANDATORY_FUNC(query_gid), | |
107 | IB_MANDATORY_FUNC(alloc_pd), | |
108 | IB_MANDATORY_FUNC(dealloc_pd), | |
109 | IB_MANDATORY_FUNC(create_ah), | |
110 | IB_MANDATORY_FUNC(destroy_ah), | |
111 | IB_MANDATORY_FUNC(create_qp), | |
112 | IB_MANDATORY_FUNC(modify_qp), | |
113 | IB_MANDATORY_FUNC(destroy_qp), | |
114 | IB_MANDATORY_FUNC(post_send), | |
115 | IB_MANDATORY_FUNC(post_recv), | |
116 | IB_MANDATORY_FUNC(create_cq), | |
117 | IB_MANDATORY_FUNC(destroy_cq), | |
118 | IB_MANDATORY_FUNC(poll_cq), | |
119 | IB_MANDATORY_FUNC(req_notify_cq), | |
120 | IB_MANDATORY_FUNC(get_dma_mr), | |
7738613e IW |
121 | IB_MANDATORY_FUNC(dereg_mr), |
122 | IB_MANDATORY_FUNC(get_port_immutable) | |
1da177e4 LT |
123 | }; |
124 | int i; | |
125 | ||
9a6b090c | 126 | for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { |
1da177e4 | 127 | if (!*(void **) ((void *) device + mandatory_table[i].offset)) { |
aba25a3e PP |
128 | pr_warn("Device %s is missing mandatory function %s\n", |
129 | device->name, mandatory_table[i].name); | |
1da177e4 LT |
130 | return -EINVAL; |
131 | } | |
132 | } | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
ecc82c53 LR |
137 | struct ib_device *__ib_device_get_by_index(u32 index) |
138 | { | |
139 | struct ib_device *device; | |
140 | ||
141 | list_for_each_entry(device, &device_list, core_list) | |
142 | if (device->index == index) | |
143 | return device; | |
144 | ||
145 | return NULL; | |
146 | } | |
147 | ||
1da177e4 LT |
148 | static struct ib_device *__ib_device_get_by_name(const char *name) |
149 | { | |
150 | struct ib_device *device; | |
151 | ||
152 | list_for_each_entry(device, &device_list, core_list) | |
153 | if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) | |
154 | return device; | |
155 | ||
156 | return NULL; | |
157 | } | |
158 | ||
1da177e4 LT |
159 | static int alloc_name(char *name) |
160 | { | |
65d470b3 | 161 | unsigned long *inuse; |
1da177e4 LT |
162 | char buf[IB_DEVICE_NAME_MAX]; |
163 | struct ib_device *device; | |
164 | int i; | |
165 | ||
65d470b3 | 166 | inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
167 | if (!inuse) |
168 | return -ENOMEM; | |
169 | ||
170 | list_for_each_entry(device, &device_list, core_list) { | |
171 | if (!sscanf(device->name, name, &i)) | |
172 | continue; | |
173 | if (i < 0 || i >= PAGE_SIZE * 8) | |
174 | continue; | |
175 | snprintf(buf, sizeof buf, name, i); | |
176 | if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) | |
177 | set_bit(i, inuse); | |
178 | } | |
179 | ||
180 | i = find_first_zero_bit(inuse, PAGE_SIZE * 8); | |
181 | free_page((unsigned long) inuse); | |
182 | snprintf(buf, sizeof buf, name, i); | |
183 | ||
184 | if (__ib_device_get_by_name(buf)) | |
185 | return -ENFILE; | |
186 | ||
187 | strlcpy(name, buf, IB_DEVICE_NAME_MAX); | |
188 | return 0; | |
189 | } | |
190 | ||
55aeed06 JG |
191 | static void ib_device_release(struct device *device) |
192 | { | |
193 | struct ib_device *dev = container_of(device, struct ib_device, dev); | |
194 | ||
4be3a4fa PP |
195 | WARN_ON(dev->reg_state == IB_DEV_REGISTERED); |
196 | if (dev->reg_state == IB_DEV_UNREGISTERED) { | |
197 | /* | |
198 | * In IB_DEV_UNINITIALIZED state, cache or port table | |
199 | * is not even created. Free cache and port table only when | |
200 | * device reaches UNREGISTERED state. | |
201 | */ | |
202 | ib_cache_release_one(dev); | |
203 | kfree(dev->port_immutable); | |
204 | } | |
55aeed06 JG |
205 | kfree(dev); |
206 | } | |
207 | ||
208 | static int ib_device_uevent(struct device *device, | |
209 | struct kobj_uevent_env *env) | |
210 | { | |
211 | struct ib_device *dev = container_of(device, struct ib_device, dev); | |
212 | ||
213 | if (add_uevent_var(env, "NAME=%s", dev->name)) | |
214 | return -ENOMEM; | |
215 | ||
216 | /* | |
217 | * It would be nice to pass the node GUID with the event... | |
218 | */ | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static struct class ib_class = { | |
224 | .name = "infiniband", | |
225 | .dev_release = ib_device_release, | |
226 | .dev_uevent = ib_device_uevent, | |
227 | }; | |
228 | ||
1da177e4 LT |
229 | /** |
230 | * ib_alloc_device - allocate an IB device struct | |
231 | * @size:size of structure to allocate | |
232 | * | |
233 | * Low-level drivers should use ib_alloc_device() to allocate &struct | |
234 | * ib_device. @size is the size of the structure to be allocated, | |
235 | * including any private data used by the low-level driver. | |
236 | * ib_dealloc_device() must be used to free structures allocated with | |
237 | * ib_alloc_device(). | |
238 | */ | |
239 | struct ib_device *ib_alloc_device(size_t size) | |
240 | { | |
55aeed06 JG |
241 | struct ib_device *device; |
242 | ||
243 | if (WARN_ON(size < sizeof(struct ib_device))) | |
244 | return NULL; | |
245 | ||
246 | device = kzalloc(size, GFP_KERNEL); | |
247 | if (!device) | |
248 | return NULL; | |
249 | ||
250 | device->dev.class = &ib_class; | |
251 | device_initialize(&device->dev); | |
252 | ||
253 | dev_set_drvdata(&device->dev, device); | |
254 | ||
255 | INIT_LIST_HEAD(&device->event_handler_list); | |
256 | spin_lock_init(&device->event_handler_lock); | |
257 | spin_lock_init(&device->client_data_lock); | |
258 | INIT_LIST_HEAD(&device->client_data_list); | |
259 | INIT_LIST_HEAD(&device->port_list); | |
1da177e4 | 260 | |
55aeed06 | 261 | return device; |
1da177e4 LT |
262 | } |
263 | EXPORT_SYMBOL(ib_alloc_device); | |
264 | ||
265 | /** | |
266 | * ib_dealloc_device - free an IB device struct | |
267 | * @device:structure to free | |
268 | * | |
269 | * Free a structure allocated with ib_alloc_device(). | |
270 | */ | |
271 | void ib_dealloc_device(struct ib_device *device) | |
272 | { | |
55aeed06 JG |
273 | WARN_ON(device->reg_state != IB_DEV_UNREGISTERED && |
274 | device->reg_state != IB_DEV_UNINITIALIZED); | |
9206dff1 | 275 | kobject_put(&device->dev.kobj); |
1da177e4 LT |
276 | } |
277 | EXPORT_SYMBOL(ib_dealloc_device); | |
278 | ||
279 | static int add_client_context(struct ib_device *device, struct ib_client *client) | |
280 | { | |
281 | struct ib_client_data *context; | |
282 | unsigned long flags; | |
283 | ||
284 | context = kmalloc(sizeof *context, GFP_KERNEL); | |
a0b3455f | 285 | if (!context) |
1da177e4 | 286 | return -ENOMEM; |
1da177e4 LT |
287 | |
288 | context->client = client; | |
289 | context->data = NULL; | |
7c1eb45a | 290 | context->going_down = false; |
1da177e4 | 291 | |
7c1eb45a | 292 | down_write(&lists_rwsem); |
1da177e4 LT |
293 | spin_lock_irqsave(&device->client_data_lock, flags); |
294 | list_add(&context->list, &device->client_data_list); | |
295 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
7c1eb45a | 296 | up_write(&lists_rwsem); |
1da177e4 LT |
297 | |
298 | return 0; | |
299 | } | |
300 | ||
337877a4 IW |
301 | static int verify_immutable(const struct ib_device *dev, u8 port) |
302 | { | |
303 | return WARN_ON(!rdma_cap_ib_mad(dev, port) && | |
304 | rdma_max_mad_size(dev, port) != 0); | |
305 | } | |
306 | ||
7738613e | 307 | static int read_port_immutable(struct ib_device *device) |
5eb620c8 | 308 | { |
55aeed06 | 309 | int ret; |
7738613e IW |
310 | u8 start_port = rdma_start_port(device); |
311 | u8 end_port = rdma_end_port(device); | |
312 | u8 port; | |
313 | ||
314 | /** | |
315 | * device->port_immutable is indexed directly by the port number to make | |
316 | * access to this data as efficient as possible. | |
317 | * | |
318 | * Therefore port_immutable is declared as a 1 based array with | |
319 | * potential empty slots at the beginning. | |
320 | */ | |
321 | device->port_immutable = kzalloc(sizeof(*device->port_immutable) | |
322 | * (end_port + 1), | |
323 | GFP_KERNEL); | |
324 | if (!device->port_immutable) | |
55aeed06 | 325 | return -ENOMEM; |
5eb620c8 | 326 | |
7738613e IW |
327 | for (port = start_port; port <= end_port; ++port) { |
328 | ret = device->get_port_immutable(device, port, | |
329 | &device->port_immutable[port]); | |
5eb620c8 | 330 | if (ret) |
55aeed06 | 331 | return ret; |
337877a4 | 332 | |
55aeed06 JG |
333 | if (verify_immutable(device, port)) |
334 | return -EINVAL; | |
5eb620c8 | 335 | } |
55aeed06 | 336 | return 0; |
5eb620c8 YE |
337 | } |
338 | ||
9abb0d1b | 339 | void ib_get_device_fw_str(struct ib_device *dev, char *str) |
5fa76c20 IW |
340 | { |
341 | if (dev->get_dev_fw_str) | |
9abb0d1b | 342 | dev->get_dev_fw_str(dev, str); |
5fa76c20 IW |
343 | else |
344 | str[0] = '\0'; | |
345 | } | |
346 | EXPORT_SYMBOL(ib_get_device_fw_str); | |
347 | ||
d291f1a6 DJ |
348 | static int setup_port_pkey_list(struct ib_device *device) |
349 | { | |
350 | int i; | |
351 | ||
352 | /** | |
353 | * device->port_pkey_list is indexed directly by the port number, | |
354 | * Therefore it is declared as a 1 based array with potential empty | |
355 | * slots at the beginning. | |
356 | */ | |
357 | device->port_pkey_list = kcalloc(rdma_end_port(device) + 1, | |
358 | sizeof(*device->port_pkey_list), | |
359 | GFP_KERNEL); | |
360 | ||
361 | if (!device->port_pkey_list) | |
362 | return -ENOMEM; | |
363 | ||
364 | for (i = 0; i < (rdma_end_port(device) + 1); i++) { | |
365 | spin_lock_init(&device->port_pkey_list[i].list_lock); | |
366 | INIT_LIST_HEAD(&device->port_pkey_list[i].pkey_list); | |
367 | } | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
8f408ab6 DJ |
372 | static void ib_policy_change_task(struct work_struct *work) |
373 | { | |
374 | struct ib_device *dev; | |
375 | ||
376 | down_read(&lists_rwsem); | |
377 | list_for_each_entry(dev, &device_list, core_list) { | |
378 | int i; | |
379 | ||
380 | for (i = rdma_start_port(dev); i <= rdma_end_port(dev); i++) { | |
381 | u64 sp; | |
382 | int ret = ib_get_cached_subnet_prefix(dev, | |
383 | i, | |
384 | &sp); | |
385 | ||
386 | WARN_ONCE(ret, | |
387 | "ib_get_cached_subnet_prefix err: %d, this should never happen here\n", | |
388 | ret); | |
a750cfde DJ |
389 | if (!ret) |
390 | ib_security_cache_change(dev, i, sp); | |
8f408ab6 DJ |
391 | } |
392 | } | |
393 | up_read(&lists_rwsem); | |
394 | } | |
395 | ||
396 | static int ib_security_change(struct notifier_block *nb, unsigned long event, | |
397 | void *lsm_data) | |
398 | { | |
399 | if (event != LSM_POLICY_CHANGE) | |
400 | return NOTIFY_DONE; | |
401 | ||
402 | schedule_work(&ib_policy_change_work); | |
403 | ||
404 | return NOTIFY_OK; | |
405 | } | |
406 | ||
ecc82c53 LR |
407 | /** |
408 | * __dev_new_index - allocate an device index | |
409 | * | |
410 | * Returns a suitable unique value for a new device interface | |
411 | * number. It assumes that there are less than 2^32-1 ib devices | |
412 | * will be present in the system. | |
413 | */ | |
414 | static u32 __dev_new_index(void) | |
415 | { | |
416 | /* | |
417 | * The device index to allow stable naming. | |
418 | * Similar to struct net -> ifindex. | |
419 | */ | |
420 | static u32 index; | |
421 | ||
422 | for (;;) { | |
423 | if (!(++index)) | |
424 | index = 1; | |
425 | ||
426 | if (!__ib_device_get_by_index(index)) | |
427 | return index; | |
428 | } | |
429 | } | |
430 | ||
1da177e4 LT |
431 | /** |
432 | * ib_register_device - Register an IB device with IB core | |
433 | * @device:Device to register | |
434 | * | |
435 | * Low-level drivers use ib_register_device() to register their | |
436 | * devices with the IB core. All registered clients will receive a | |
437 | * callback for each device that is added. @device must be allocated | |
438 | * with ib_alloc_device(). | |
439 | */ | |
9a6edb60 RC |
440 | int ib_register_device(struct ib_device *device, |
441 | int (*port_callback)(struct ib_device *, | |
442 | u8, struct kobject *)) | |
1da177e4 LT |
443 | { |
444 | int ret; | |
b8071ad8 | 445 | struct ib_client *client; |
3e153a93 | 446 | struct ib_udata uhw = {.outlen = 0, .inlen = 0}; |
99db9494 BVA |
447 | struct device *parent = device->dev.parent; |
448 | ||
449 | WARN_ON_ONCE(!parent); | |
0957c29f BVA |
450 | WARN_ON_ONCE(device->dma_device); |
451 | if (device->dev.dma_ops) { | |
452 | /* | |
453 | * The caller provided custom DMA operations. Copy the | |
454 | * DMA-related fields that are used by e.g. dma_alloc_coherent() | |
455 | * into device->dev. | |
456 | */ | |
457 | device->dma_device = &device->dev; | |
458 | if (!device->dev.dma_mask) | |
459 | device->dev.dma_mask = parent->dma_mask; | |
460 | if (!device->dev.coherent_dma_mask) | |
461 | device->dev.coherent_dma_mask = | |
462 | parent->coherent_dma_mask; | |
463 | } else { | |
464 | /* | |
465 | * The caller did not provide custom DMA operations. Use the | |
466 | * DMA mapping operations of the parent device. | |
467 | */ | |
468 | device->dma_device = parent; | |
469 | } | |
1da177e4 | 470 | |
95ed644f | 471 | mutex_lock(&device_mutex); |
1da177e4 LT |
472 | |
473 | if (strchr(device->name, '%')) { | |
474 | ret = alloc_name(device->name); | |
475 | if (ret) | |
476 | goto out; | |
477 | } | |
478 | ||
479 | if (ib_device_check_mandatory(device)) { | |
480 | ret = -EINVAL; | |
481 | goto out; | |
482 | } | |
483 | ||
7738613e | 484 | ret = read_port_immutable(device); |
5eb620c8 | 485 | if (ret) { |
aba25a3e PP |
486 | pr_warn("Couldn't create per port immutable data %s\n", |
487 | device->name); | |
5eb620c8 YE |
488 | goto out; |
489 | } | |
490 | ||
d291f1a6 DJ |
491 | ret = setup_port_pkey_list(device); |
492 | if (ret) { | |
493 | pr_warn("Couldn't create per port_pkey_list\n"); | |
494 | goto out; | |
495 | } | |
496 | ||
03db3a2d MB |
497 | ret = ib_cache_setup_one(device); |
498 | if (ret) { | |
aba25a3e | 499 | pr_warn("Couldn't set up InfiniBand P_Key/GID cache\n"); |
4be3a4fa | 500 | goto port_cleanup; |
03db3a2d MB |
501 | } |
502 | ||
43579b5f PP |
503 | ret = ib_device_register_rdmacg(device); |
504 | if (ret) { | |
505 | pr_warn("Couldn't register device with rdma cgroup\n"); | |
4be3a4fa | 506 | goto cache_cleanup; |
43579b5f PP |
507 | } |
508 | ||
3e153a93 IW |
509 | memset(&device->attrs, 0, sizeof(device->attrs)); |
510 | ret = device->query_device(device, &device->attrs, &uhw); | |
511 | if (ret) { | |
aba25a3e | 512 | pr_warn("Couldn't query the device attributes\n"); |
4be3a4fa | 513 | goto cache_cleanup; |
3e153a93 IW |
514 | } |
515 | ||
9a6edb60 | 516 | ret = ib_device_register_sysfs(device, port_callback); |
1da177e4 | 517 | if (ret) { |
aba25a3e PP |
518 | pr_warn("Couldn't register device %s with driver model\n", |
519 | device->name); | |
4be3a4fa | 520 | goto cache_cleanup; |
1da177e4 LT |
521 | } |
522 | ||
1da177e4 LT |
523 | device->reg_state = IB_DEV_REGISTERED; |
524 | ||
b8071ad8 | 525 | list_for_each_entry(client, &client_list, list) |
b059e210 | 526 | if (!add_client_context(device, client) && client->add) |
b8071ad8 | 527 | client->add(device); |
1da177e4 | 528 | |
ecc82c53 | 529 | device->index = __dev_new_index(); |
5aa44bb9 HE |
530 | down_write(&lists_rwsem); |
531 | list_add_tail(&device->core_list, &device_list); | |
532 | up_write(&lists_rwsem); | |
4be3a4fa PP |
533 | mutex_unlock(&device_mutex); |
534 | return 0; | |
535 | ||
536 | cache_cleanup: | |
537 | ib_cache_cleanup_one(device); | |
538 | ib_cache_release_one(device); | |
539 | port_cleanup: | |
540 | kfree(device->port_immutable); | |
5aa44bb9 | 541 | out: |
95ed644f | 542 | mutex_unlock(&device_mutex); |
1da177e4 LT |
543 | return ret; |
544 | } | |
545 | EXPORT_SYMBOL(ib_register_device); | |
546 | ||
547 | /** | |
548 | * ib_unregister_device - Unregister an IB device | |
549 | * @device:Device to unregister | |
550 | * | |
551 | * Unregister an IB device. All clients will receive a remove callback. | |
552 | */ | |
553 | void ib_unregister_device(struct ib_device *device) | |
554 | { | |
1da177e4 LT |
555 | struct ib_client_data *context, *tmp; |
556 | unsigned long flags; | |
557 | ||
95ed644f | 558 | mutex_lock(&device_mutex); |
1da177e4 | 559 | |
5aa44bb9 HE |
560 | down_write(&lists_rwsem); |
561 | list_del(&device->core_list); | |
7c1eb45a HE |
562 | spin_lock_irqsave(&device->client_data_lock, flags); |
563 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
564 | context->going_down = true; | |
565 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
566 | downgrade_write(&lists_rwsem); | |
5aa44bb9 | 567 | |
7c1eb45a HE |
568 | list_for_each_entry_safe(context, tmp, &device->client_data_list, |
569 | list) { | |
570 | if (context->client->remove) | |
571 | context->client->remove(device, context->data); | |
572 | } | |
573 | up_read(&lists_rwsem); | |
1da177e4 | 574 | |
43579b5f | 575 | ib_device_unregister_rdmacg(device); |
9206dff1 | 576 | ib_device_unregister_sysfs(device); |
06f8174a SS |
577 | |
578 | mutex_unlock(&device_mutex); | |
579 | ||
03db3a2d | 580 | ib_cache_cleanup_one(device); |
9206dff1 | 581 | |
d291f1a6 DJ |
582 | ib_security_destroy_port_pkey_list(device); |
583 | kfree(device->port_pkey_list); | |
584 | ||
7c1eb45a | 585 | down_write(&lists_rwsem); |
1da177e4 LT |
586 | spin_lock_irqsave(&device->client_data_lock, flags); |
587 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
588 | kfree(context); | |
589 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
7c1eb45a | 590 | up_write(&lists_rwsem); |
1da177e4 LT |
591 | |
592 | device->reg_state = IB_DEV_UNREGISTERED; | |
593 | } | |
594 | EXPORT_SYMBOL(ib_unregister_device); | |
595 | ||
596 | /** | |
597 | * ib_register_client - Register an IB client | |
598 | * @client:Client to register | |
599 | * | |
600 | * Upper level users of the IB drivers can use ib_register_client() to | |
601 | * register callbacks for IB device addition and removal. When an IB | |
602 | * device is added, each registered client's add method will be called | |
603 | * (in the order the clients were registered), and when a device is | |
604 | * removed, each client's remove method will be called (in the reverse | |
605 | * order that clients were registered). In addition, when | |
606 | * ib_register_client() is called, the client will receive an add | |
607 | * callback for all devices already registered. | |
608 | */ | |
609 | int ib_register_client(struct ib_client *client) | |
610 | { | |
611 | struct ib_device *device; | |
612 | ||
95ed644f | 613 | mutex_lock(&device_mutex); |
1da177e4 | 614 | |
1da177e4 | 615 | list_for_each_entry(device, &device_list, core_list) |
b059e210 | 616 | if (!add_client_context(device, client) && client->add) |
1da177e4 LT |
617 | client->add(device); |
618 | ||
5aa44bb9 HE |
619 | down_write(&lists_rwsem); |
620 | list_add_tail(&client->list, &client_list); | |
621 | up_write(&lists_rwsem); | |
622 | ||
95ed644f | 623 | mutex_unlock(&device_mutex); |
1da177e4 LT |
624 | |
625 | return 0; | |
626 | } | |
627 | EXPORT_SYMBOL(ib_register_client); | |
628 | ||
629 | /** | |
630 | * ib_unregister_client - Unregister an IB client | |
631 | * @client:Client to unregister | |
632 | * | |
633 | * Upper level users use ib_unregister_client() to remove their client | |
634 | * registration. When ib_unregister_client() is called, the client | |
635 | * will receive a remove callback for each IB device still registered. | |
636 | */ | |
637 | void ib_unregister_client(struct ib_client *client) | |
638 | { | |
639 | struct ib_client_data *context, *tmp; | |
640 | struct ib_device *device; | |
641 | unsigned long flags; | |
642 | ||
95ed644f | 643 | mutex_lock(&device_mutex); |
1da177e4 | 644 | |
5aa44bb9 HE |
645 | down_write(&lists_rwsem); |
646 | list_del(&client->list); | |
647 | up_write(&lists_rwsem); | |
648 | ||
1da177e4 | 649 | list_for_each_entry(device, &device_list, core_list) { |
7c1eb45a | 650 | struct ib_client_data *found_context = NULL; |
1da177e4 | 651 | |
7c1eb45a | 652 | down_write(&lists_rwsem); |
1da177e4 LT |
653 | spin_lock_irqsave(&device->client_data_lock, flags); |
654 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) | |
655 | if (context->client == client) { | |
7c1eb45a HE |
656 | context->going_down = true; |
657 | found_context = context; | |
658 | break; | |
1da177e4 LT |
659 | } |
660 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
7c1eb45a HE |
661 | up_write(&lists_rwsem); |
662 | ||
663 | if (client->remove) | |
664 | client->remove(device, found_context ? | |
665 | found_context->data : NULL); | |
666 | ||
667 | if (!found_context) { | |
668 | pr_warn("No client context found for %s/%s\n", | |
669 | device->name, client->name); | |
670 | continue; | |
671 | } | |
672 | ||
673 | down_write(&lists_rwsem); | |
674 | spin_lock_irqsave(&device->client_data_lock, flags); | |
675 | list_del(&found_context->list); | |
676 | kfree(found_context); | |
677 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
678 | up_write(&lists_rwsem); | |
1da177e4 | 679 | } |
1da177e4 | 680 | |
95ed644f | 681 | mutex_unlock(&device_mutex); |
1da177e4 LT |
682 | } |
683 | EXPORT_SYMBOL(ib_unregister_client); | |
684 | ||
685 | /** | |
686 | * ib_get_client_data - Get IB client context | |
687 | * @device:Device to get context for | |
688 | * @client:Client to get context for | |
689 | * | |
690 | * ib_get_client_data() returns client context set with | |
691 | * ib_set_client_data(). | |
692 | */ | |
693 | void *ib_get_client_data(struct ib_device *device, struct ib_client *client) | |
694 | { | |
695 | struct ib_client_data *context; | |
696 | void *ret = NULL; | |
697 | unsigned long flags; | |
698 | ||
699 | spin_lock_irqsave(&device->client_data_lock, flags); | |
700 | list_for_each_entry(context, &device->client_data_list, list) | |
701 | if (context->client == client) { | |
702 | ret = context->data; | |
703 | break; | |
704 | } | |
705 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
706 | ||
707 | return ret; | |
708 | } | |
709 | EXPORT_SYMBOL(ib_get_client_data); | |
710 | ||
711 | /** | |
9cd330d3 | 712 | * ib_set_client_data - Set IB client context |
1da177e4 LT |
713 | * @device:Device to set context for |
714 | * @client:Client to set context for | |
715 | * @data:Context to set | |
716 | * | |
717 | * ib_set_client_data() sets client context that can be retrieved with | |
718 | * ib_get_client_data(). | |
719 | */ | |
720 | void ib_set_client_data(struct ib_device *device, struct ib_client *client, | |
721 | void *data) | |
722 | { | |
723 | struct ib_client_data *context; | |
724 | unsigned long flags; | |
725 | ||
726 | spin_lock_irqsave(&device->client_data_lock, flags); | |
727 | list_for_each_entry(context, &device->client_data_list, list) | |
728 | if (context->client == client) { | |
729 | context->data = data; | |
730 | goto out; | |
731 | } | |
732 | ||
aba25a3e PP |
733 | pr_warn("No client context found for %s/%s\n", |
734 | device->name, client->name); | |
1da177e4 LT |
735 | |
736 | out: | |
737 | spin_unlock_irqrestore(&device->client_data_lock, flags); | |
738 | } | |
739 | EXPORT_SYMBOL(ib_set_client_data); | |
740 | ||
741 | /** | |
742 | * ib_register_event_handler - Register an IB event handler | |
743 | * @event_handler:Handler to register | |
744 | * | |
745 | * ib_register_event_handler() registers an event handler that will be | |
746 | * called back when asynchronous IB events occur (as defined in | |
747 | * chapter 11 of the InfiniBand Architecture Specification). This | |
748 | * callback may occur in interrupt context. | |
749 | */ | |
dcc9881e | 750 | void ib_register_event_handler(struct ib_event_handler *event_handler) |
1da177e4 LT |
751 | { |
752 | unsigned long flags; | |
753 | ||
754 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
755 | list_add_tail(&event_handler->list, | |
756 | &event_handler->device->event_handler_list); | |
757 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
1da177e4 LT |
758 | } |
759 | EXPORT_SYMBOL(ib_register_event_handler); | |
760 | ||
761 | /** | |
762 | * ib_unregister_event_handler - Unregister an event handler | |
763 | * @event_handler:Handler to unregister | |
764 | * | |
765 | * Unregister an event handler registered with | |
766 | * ib_register_event_handler(). | |
767 | */ | |
dcc9881e | 768 | void ib_unregister_event_handler(struct ib_event_handler *event_handler) |
1da177e4 LT |
769 | { |
770 | unsigned long flags; | |
771 | ||
772 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); | |
773 | list_del(&event_handler->list); | |
774 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); | |
1da177e4 LT |
775 | } |
776 | EXPORT_SYMBOL(ib_unregister_event_handler); | |
777 | ||
778 | /** | |
779 | * ib_dispatch_event - Dispatch an asynchronous event | |
780 | * @event:Event to dispatch | |
781 | * | |
782 | * Low-level drivers must call ib_dispatch_event() to dispatch the | |
783 | * event to all registered event handlers when an asynchronous event | |
784 | * occurs. | |
785 | */ | |
786 | void ib_dispatch_event(struct ib_event *event) | |
787 | { | |
788 | unsigned long flags; | |
789 | struct ib_event_handler *handler; | |
790 | ||
791 | spin_lock_irqsave(&event->device->event_handler_lock, flags); | |
792 | ||
793 | list_for_each_entry(handler, &event->device->event_handler_list, list) | |
794 | handler->handler(handler, event); | |
795 | ||
796 | spin_unlock_irqrestore(&event->device->event_handler_lock, flags); | |
797 | } | |
798 | EXPORT_SYMBOL(ib_dispatch_event); | |
799 | ||
1da177e4 LT |
800 | /** |
801 | * ib_query_port - Query IB port attributes | |
802 | * @device:Device to query | |
803 | * @port_num:Port number to query | |
804 | * @port_attr:Port attributes | |
805 | * | |
806 | * ib_query_port() returns the attributes of a port through the | |
807 | * @port_attr pointer. | |
808 | */ | |
809 | int ib_query_port(struct ib_device *device, | |
810 | u8 port_num, | |
811 | struct ib_port_attr *port_attr) | |
812 | { | |
fad61ad4 EC |
813 | union ib_gid gid; |
814 | int err; | |
815 | ||
24dc831b | 816 | if (!rdma_is_port_valid(device, port_num)) |
116c0074 RD |
817 | return -EINVAL; |
818 | ||
fad61ad4 EC |
819 | memset(port_attr, 0, sizeof(*port_attr)); |
820 | err = device->query_port(device, port_num, port_attr); | |
821 | if (err || port_attr->subnet_prefix) | |
822 | return err; | |
823 | ||
d7012467 EC |
824 | if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND) |
825 | return 0; | |
826 | ||
fad61ad4 EC |
827 | err = ib_query_gid(device, port_num, 0, &gid, NULL); |
828 | if (err) | |
829 | return err; | |
830 | ||
831 | port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix); | |
832 | return 0; | |
1da177e4 LT |
833 | } |
834 | EXPORT_SYMBOL(ib_query_port); | |
835 | ||
836 | /** | |
837 | * ib_query_gid - Get GID table entry | |
838 | * @device:Device to query | |
839 | * @port_num:Port number to query | |
840 | * @index:GID table index to query | |
841 | * @gid:Returned GID | |
55ee3ab2 MB |
842 | * @attr: Returned GID attributes related to this GID index (only in RoCE). |
843 | * NULL means ignore. | |
1da177e4 LT |
844 | * |
845 | * ib_query_gid() fetches the specified GID table entry. | |
846 | */ | |
847 | int ib_query_gid(struct ib_device *device, | |
55ee3ab2 MB |
848 | u8 port_num, int index, union ib_gid *gid, |
849 | struct ib_gid_attr *attr) | |
1da177e4 | 850 | { |
03db3a2d | 851 | if (rdma_cap_roce_gid_table(device, port_num)) |
55ee3ab2 MB |
852 | return ib_get_cached_gid(device, port_num, index, gid, attr); |
853 | ||
854 | if (attr) | |
855 | return -EINVAL; | |
03db3a2d | 856 | |
1da177e4 LT |
857 | return device->query_gid(device, port_num, index, gid); |
858 | } | |
859 | EXPORT_SYMBOL(ib_query_gid); | |
860 | ||
03db3a2d MB |
861 | /** |
862 | * ib_enum_roce_netdev - enumerate all RoCE ports | |
863 | * @ib_dev : IB device we want to query | |
864 | * @filter: Should we call the callback? | |
865 | * @filter_cookie: Cookie passed to filter | |
866 | * @cb: Callback to call for each found RoCE ports | |
867 | * @cookie: Cookie passed back to the callback | |
868 | * | |
869 | * Enumerates all of the physical RoCE ports of ib_dev | |
870 | * which are related to netdevice and calls callback() on each | |
871 | * device for which filter() function returns non zero. | |
872 | */ | |
873 | void ib_enum_roce_netdev(struct ib_device *ib_dev, | |
874 | roce_netdev_filter filter, | |
875 | void *filter_cookie, | |
876 | roce_netdev_callback cb, | |
877 | void *cookie) | |
878 | { | |
879 | u8 port; | |
880 | ||
881 | for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev); | |
882 | port++) | |
883 | if (rdma_protocol_roce(ib_dev, port)) { | |
884 | struct net_device *idev = NULL; | |
885 | ||
886 | if (ib_dev->get_netdev) | |
887 | idev = ib_dev->get_netdev(ib_dev, port); | |
888 | ||
889 | if (idev && | |
890 | idev->reg_state >= NETREG_UNREGISTERED) { | |
891 | dev_put(idev); | |
892 | idev = NULL; | |
893 | } | |
894 | ||
895 | if (filter(ib_dev, port, idev, filter_cookie)) | |
896 | cb(ib_dev, port, idev, cookie); | |
897 | ||
898 | if (idev) | |
899 | dev_put(idev); | |
900 | } | |
901 | } | |
902 | ||
903 | /** | |
904 | * ib_enum_all_roce_netdevs - enumerate all RoCE devices | |
905 | * @filter: Should we call the callback? | |
906 | * @filter_cookie: Cookie passed to filter | |
907 | * @cb: Callback to call for each found RoCE ports | |
908 | * @cookie: Cookie passed back to the callback | |
909 | * | |
910 | * Enumerates all RoCE devices' physical ports which are related | |
911 | * to netdevices and calls callback() on each device for which | |
912 | * filter() function returns non zero. | |
913 | */ | |
914 | void ib_enum_all_roce_netdevs(roce_netdev_filter filter, | |
915 | void *filter_cookie, | |
916 | roce_netdev_callback cb, | |
917 | void *cookie) | |
918 | { | |
919 | struct ib_device *dev; | |
920 | ||
921 | down_read(&lists_rwsem); | |
922 | list_for_each_entry(dev, &device_list, core_list) | |
923 | ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie); | |
924 | up_read(&lists_rwsem); | |
8030c835 LR |
925 | } |
926 | ||
927 | /** | |
928 | * ib_enum_all_devs - enumerate all ib_devices | |
929 | * @cb: Callback to call for each found ib_device | |
930 | * | |
931 | * Enumerates all ib_devices and calls callback() on each device. | |
932 | */ | |
933 | int ib_enum_all_devs(nldev_callback nldev_cb, struct sk_buff *skb, | |
934 | struct netlink_callback *cb) | |
935 | { | |
936 | struct ib_device *dev; | |
937 | unsigned int idx = 0; | |
938 | int ret = 0; | |
939 | ||
940 | down_read(&lists_rwsem); | |
941 | list_for_each_entry(dev, &device_list, core_list) { | |
942 | ret = nldev_cb(dev, skb, cb, idx); | |
943 | if (ret) | |
944 | break; | |
945 | idx++; | |
946 | } | |
947 | ||
948 | up_read(&lists_rwsem); | |
949 | return ret; | |
03db3a2d MB |
950 | } |
951 | ||
1da177e4 LT |
952 | /** |
953 | * ib_query_pkey - Get P_Key table entry | |
954 | * @device:Device to query | |
955 | * @port_num:Port number to query | |
956 | * @index:P_Key table index to query | |
957 | * @pkey:Returned P_Key | |
958 | * | |
959 | * ib_query_pkey() fetches the specified P_Key table entry. | |
960 | */ | |
961 | int ib_query_pkey(struct ib_device *device, | |
962 | u8 port_num, u16 index, u16 *pkey) | |
963 | { | |
964 | return device->query_pkey(device, port_num, index, pkey); | |
965 | } | |
966 | EXPORT_SYMBOL(ib_query_pkey); | |
967 | ||
968 | /** | |
969 | * ib_modify_device - Change IB device attributes | |
970 | * @device:Device to modify | |
971 | * @device_modify_mask:Mask of attributes to change | |
972 | * @device_modify:New attribute values | |
973 | * | |
974 | * ib_modify_device() changes a device's attributes as specified by | |
975 | * the @device_modify_mask and @device_modify structure. | |
976 | */ | |
977 | int ib_modify_device(struct ib_device *device, | |
978 | int device_modify_mask, | |
979 | struct ib_device_modify *device_modify) | |
980 | { | |
10e1b54b BVA |
981 | if (!device->modify_device) |
982 | return -ENOSYS; | |
983 | ||
1da177e4 LT |
984 | return device->modify_device(device, device_modify_mask, |
985 | device_modify); | |
986 | } | |
987 | EXPORT_SYMBOL(ib_modify_device); | |
988 | ||
989 | /** | |
990 | * ib_modify_port - Modifies the attributes for the specified port. | |
991 | * @device: The device to modify. | |
992 | * @port_num: The number of the port to modify. | |
993 | * @port_modify_mask: Mask used to specify which attributes of the port | |
994 | * to change. | |
995 | * @port_modify: New attribute values for the port. | |
996 | * | |
997 | * ib_modify_port() changes a port's attributes as specified by the | |
998 | * @port_modify_mask and @port_modify structure. | |
999 | */ | |
1000 | int ib_modify_port(struct ib_device *device, | |
1001 | u8 port_num, int port_modify_mask, | |
1002 | struct ib_port_modify *port_modify) | |
1003 | { | |
61e0962d | 1004 | int rc; |
10e1b54b | 1005 | |
24dc831b | 1006 | if (!rdma_is_port_valid(device, port_num)) |
116c0074 RD |
1007 | return -EINVAL; |
1008 | ||
61e0962d SX |
1009 | if (device->modify_port) |
1010 | rc = device->modify_port(device, port_num, port_modify_mask, | |
1011 | port_modify); | |
1012 | else | |
1013 | rc = rdma_protocol_roce(device, port_num) ? 0 : -ENOSYS; | |
1014 | return rc; | |
1da177e4 LT |
1015 | } |
1016 | EXPORT_SYMBOL(ib_modify_port); | |
1017 | ||
5eb620c8 YE |
1018 | /** |
1019 | * ib_find_gid - Returns the port number and GID table index where | |
1020 | * a specified GID value occurs. | |
1021 | * @device: The device to query. | |
1022 | * @gid: The GID value to search for. | |
b39ffa1d | 1023 | * @gid_type: Type of GID. |
55ee3ab2 | 1024 | * @ndev: The ndev related to the GID to search for. |
5eb620c8 YE |
1025 | * @port_num: The port number of the device where the GID value was found. |
1026 | * @index: The index into the GID table where the GID was found. This | |
1027 | * parameter may be NULL. | |
1028 | */ | |
1029 | int ib_find_gid(struct ib_device *device, union ib_gid *gid, | |
b39ffa1d MB |
1030 | enum ib_gid_type gid_type, struct net_device *ndev, |
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) { |
03db3a2d | 1037 | if (rdma_cap_roce_gid_table(device, port)) { |
b39ffa1d | 1038 | if (!ib_find_cached_gid_by_port(device, gid, gid_type, port, |
d300ec52 | 1039 | ndev, index)) { |
03db3a2d MB |
1040 | *port_num = port; |
1041 | return 0; | |
98d25afa | 1042 | } |
03db3a2d MB |
1043 | } |
1044 | ||
b39ffa1d MB |
1045 | if (gid_type != IB_GID_TYPE_IB) |
1046 | continue; | |
1047 | ||
7738613e | 1048 | for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { |
55ee3ab2 | 1049 | ret = ib_query_gid(device, port, i, &tmp_gid, NULL); |
5eb620c8 YE |
1050 | if (ret) |
1051 | return ret; | |
1052 | if (!memcmp(&tmp_gid, gid, sizeof *gid)) { | |
1053 | *port_num = port; | |
1054 | if (index) | |
1055 | *index = i; | |
1056 | return 0; | |
1057 | } | |
1058 | } | |
1059 | } | |
1060 | ||
1061 | return -ENOENT; | |
1062 | } | |
1063 | EXPORT_SYMBOL(ib_find_gid); | |
1064 | ||
1065 | /** | |
1066 | * ib_find_pkey - Returns the PKey table index where a specified | |
1067 | * PKey value occurs. | |
1068 | * @device: The device to query. | |
1069 | * @port_num: The port number of the device to search for the PKey. | |
1070 | * @pkey: The PKey value to search for. | |
1071 | * @index: The index into the PKey table where the PKey was found. | |
1072 | */ | |
1073 | int ib_find_pkey(struct ib_device *device, | |
1074 | u8 port_num, u16 pkey, u16 *index) | |
1075 | { | |
1076 | int ret, i; | |
1077 | u16 tmp_pkey; | |
ff7166c4 | 1078 | int partial_ix = -1; |
5eb620c8 | 1079 | |
7738613e | 1080 | for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { |
5eb620c8 YE |
1081 | ret = ib_query_pkey(device, port_num, i, &tmp_pkey); |
1082 | if (ret) | |
1083 | return ret; | |
36026ecc | 1084 | if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { |
ff7166c4 JM |
1085 | /* if there is full-member pkey take it.*/ |
1086 | if (tmp_pkey & 0x8000) { | |
1087 | *index = i; | |
1088 | return 0; | |
1089 | } | |
1090 | if (partial_ix < 0) | |
1091 | partial_ix = i; | |
5eb620c8 YE |
1092 | } |
1093 | } | |
1094 | ||
ff7166c4 JM |
1095 | /*no full-member, if exists take the limited*/ |
1096 | if (partial_ix >= 0) { | |
1097 | *index = partial_ix; | |
1098 | return 0; | |
1099 | } | |
5eb620c8 YE |
1100 | return -ENOENT; |
1101 | } | |
1102 | EXPORT_SYMBOL(ib_find_pkey); | |
1103 | ||
9268f72d YK |
1104 | /** |
1105 | * ib_get_net_dev_by_params() - Return the appropriate net_dev | |
1106 | * for a received CM request | |
1107 | * @dev: An RDMA device on which the request has been received. | |
1108 | * @port: Port number on the RDMA device. | |
1109 | * @pkey: The Pkey the request came on. | |
1110 | * @gid: A GID that the net_dev uses to communicate. | |
1111 | * @addr: Contains the IP address that the request specified as its | |
1112 | * destination. | |
1113 | */ | |
1114 | struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, | |
1115 | u8 port, | |
1116 | u16 pkey, | |
1117 | const union ib_gid *gid, | |
1118 | const struct sockaddr *addr) | |
1119 | { | |
1120 | struct net_device *net_dev = NULL; | |
1121 | struct ib_client_data *context; | |
1122 | ||
1123 | if (!rdma_protocol_ib(dev, port)) | |
1124 | return NULL; | |
1125 | ||
1126 | down_read(&lists_rwsem); | |
1127 | ||
1128 | list_for_each_entry(context, &dev->client_data_list, list) { | |
1129 | struct ib_client *client = context->client; | |
1130 | ||
1131 | if (context->going_down) | |
1132 | continue; | |
1133 | ||
1134 | if (client->get_net_dev_by_params) { | |
1135 | net_dev = client->get_net_dev_by_params(dev, port, pkey, | |
1136 | gid, addr, | |
1137 | context->data); | |
1138 | if (net_dev) | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | up_read(&lists_rwsem); | |
1144 | ||
1145 | return net_dev; | |
1146 | } | |
1147 | EXPORT_SYMBOL(ib_get_net_dev_by_params); | |
1148 | ||
3250b4db | 1149 | static const struct rdma_nl_cbs ibnl_ls_cb_table[] = { |
735c631a | 1150 | [RDMA_NL_LS_OP_RESOLVE] = { |
647c75ac | 1151 | .doit = ib_nl_handle_resolve_resp, |
e3a2b93d LR |
1152 | .flags = RDMA_NL_ADMIN_PERM, |
1153 | }, | |
735c631a | 1154 | [RDMA_NL_LS_OP_SET_TIMEOUT] = { |
647c75ac | 1155 | .doit = ib_nl_handle_set_timeout, |
e3a2b93d LR |
1156 | .flags = RDMA_NL_ADMIN_PERM, |
1157 | }, | |
ae43f828 | 1158 | [RDMA_NL_LS_OP_IP_RESOLVE] = { |
647c75ac | 1159 | .doit = ib_nl_handle_ip_res_resp, |
e3a2b93d LR |
1160 | .flags = RDMA_NL_ADMIN_PERM, |
1161 | }, | |
735c631a MB |
1162 | }; |
1163 | ||
1da177e4 LT |
1164 | static int __init ib_core_init(void) |
1165 | { | |
1166 | int ret; | |
1167 | ||
f0626710 TH |
1168 | ib_wq = alloc_workqueue("infiniband", 0, 0); |
1169 | if (!ib_wq) | |
1170 | return -ENOMEM; | |
1171 | ||
14d3a3b2 | 1172 | ib_comp_wq = alloc_workqueue("ib-comp-wq", |
b7363e67 | 1173 | WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, 0); |
14d3a3b2 CH |
1174 | if (!ib_comp_wq) { |
1175 | ret = -ENOMEM; | |
1176 | goto err; | |
1177 | } | |
1178 | ||
55aeed06 | 1179 | ret = class_register(&ib_class); |
fd75c789 | 1180 | if (ret) { |
aba25a3e | 1181 | pr_warn("Couldn't create InfiniBand device class\n"); |
14d3a3b2 | 1182 | goto err_comp; |
fd75c789 | 1183 | } |
1da177e4 | 1184 | |
c9901724 | 1185 | ret = rdma_nl_init(); |
b2cbae2c | 1186 | if (ret) { |
c9901724 | 1187 | pr_warn("Couldn't init IB netlink interface: err %d\n", ret); |
b2cbae2c RD |
1188 | goto err_sysfs; |
1189 | } | |
1190 | ||
e3f20f02 LR |
1191 | ret = addr_init(); |
1192 | if (ret) { | |
1193 | pr_warn("Could't init IB address resolution\n"); | |
1194 | goto err_ibnl; | |
1195 | } | |
1196 | ||
4c2cb422 MB |
1197 | ret = ib_mad_init(); |
1198 | if (ret) { | |
1199 | pr_warn("Couldn't init IB MAD\n"); | |
1200 | goto err_addr; | |
1201 | } | |
1202 | ||
c2e49c92 MB |
1203 | ret = ib_sa_init(); |
1204 | if (ret) { | |
1205 | pr_warn("Couldn't init SA\n"); | |
1206 | goto err_mad; | |
1207 | } | |
1208 | ||
8f408ab6 DJ |
1209 | ret = register_lsm_notifier(&ibdev_lsm_nb); |
1210 | if (ret) { | |
1211 | pr_warn("Couldn't register LSM notifier. ret %d\n", ret); | |
c9901724 | 1212 | goto err_sa; |
8f408ab6 DJ |
1213 | } |
1214 | ||
6c80b41a | 1215 | nldev_init(); |
c9901724 | 1216 | rdma_nl_register(RDMA_NL_LS, ibnl_ls_cb_table); |
03db3a2d | 1217 | ib_cache_setup(); |
1da177e4 | 1218 | |
fd75c789 NM |
1219 | return 0; |
1220 | ||
735c631a MB |
1221 | err_sa: |
1222 | ib_sa_cleanup(); | |
c2e49c92 MB |
1223 | err_mad: |
1224 | ib_mad_cleanup(); | |
4c2cb422 MB |
1225 | err_addr: |
1226 | addr_cleanup(); | |
e3f20f02 | 1227 | err_ibnl: |
c9901724 | 1228 | rdma_nl_exit(); |
fd75c789 | 1229 | err_sysfs: |
55aeed06 | 1230 | class_unregister(&ib_class); |
14d3a3b2 CH |
1231 | err_comp: |
1232 | destroy_workqueue(ib_comp_wq); | |
fd75c789 NM |
1233 | err: |
1234 | destroy_workqueue(ib_wq); | |
1da177e4 LT |
1235 | return ret; |
1236 | } | |
1237 | ||
1238 | static void __exit ib_core_cleanup(void) | |
1239 | { | |
1240 | ib_cache_cleanup(); | |
6c80b41a | 1241 | nldev_exit(); |
c9901724 LR |
1242 | rdma_nl_unregister(RDMA_NL_LS); |
1243 | unregister_lsm_notifier(&ibdev_lsm_nb); | |
c2e49c92 | 1244 | ib_sa_cleanup(); |
4c2cb422 | 1245 | ib_mad_cleanup(); |
e3f20f02 | 1246 | addr_cleanup(); |
c9901724 | 1247 | rdma_nl_exit(); |
55aeed06 | 1248 | class_unregister(&ib_class); |
14d3a3b2 | 1249 | destroy_workqueue(ib_comp_wq); |
f7c6a7b5 | 1250 | /* Make sure that any pending umem accounting work is done. */ |
f0626710 | 1251 | destroy_workqueue(ib_wq); |
1da177e4 LT |
1252 | } |
1253 | ||
e3bf14bd JG |
1254 | MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS, 4); |
1255 | ||
1da177e4 LT |
1256 | module_init(ib_core_init); |
1257 | module_exit(ib_core_cleanup); |