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> | |
9268f72d | 40 | #include <linux/netdevice.h> |
4e0f7b90 | 41 | #include <net/net_namespace.h> |
8f408ab6 DJ |
42 | #include <linux/security.h> |
43 | #include <linux/notifier.h> | |
324e227e | 44 | #include <linux/hashtable.h> |
b2cbae2c | 45 | #include <rdma/rdma_netlink.h> |
03db3a2d MB |
46 | #include <rdma/ib_addr.h> |
47 | #include <rdma/ib_cache.h> | |
413d3347 | 48 | #include <rdma/rdma_counter.h> |
1da177e4 LT |
49 | |
50 | #include "core_priv.h" | |
41eda65c | 51 | #include "restrack.h" |
1da177e4 LT |
52 | |
53 | MODULE_AUTHOR("Roland Dreier"); | |
54 | MODULE_DESCRIPTION("core kernel InfiniBand API"); | |
55 | MODULE_LICENSE("Dual BSD/GPL"); | |
56 | ||
14d3a3b2 | 57 | struct workqueue_struct *ib_comp_wq; |
f794809a | 58 | struct workqueue_struct *ib_comp_unbound_wq; |
f0626710 TH |
59 | struct workqueue_struct *ib_wq; |
60 | EXPORT_SYMBOL_GPL(ib_wq); | |
ff815a89 | 61 | static struct workqueue_struct *ib_unreg_wq; |
f0626710 | 62 | |
921eab11 JG |
63 | /* |
64 | * Each of the three rwsem locks (devices, clients, client_data) protects the | |
65 | * xarray of the same name. Specifically it allows the caller to assert that | |
66 | * the MARK will/will not be changing under the lock, and for devices and | |
67 | * clients, that the value in the xarray is still a valid pointer. Change of | |
68 | * the MARK is linked to the object state, so holding the lock and testing the | |
69 | * MARK also asserts that the contained object is in a certain state. | |
70 | * | |
71 | * This is used to build a two stage register/unregister flow where objects | |
72 | * can continue to be in the xarray even though they are still in progress to | |
73 | * register/unregister. | |
74 | * | |
75 | * The xarray itself provides additional locking, and restartable iteration, | |
76 | * which is also relied on. | |
77 | * | |
78 | * Locks should not be nested, with the exception of client_data, which is | |
79 | * allowed to nest under the read side of the other two locks. | |
80 | * | |
81 | * The devices_rwsem also protects the device name list, any change or | |
82 | * assignment of device name must also hold the write side to guarantee unique | |
83 | * names. | |
84 | */ | |
85 | ||
0df91bb6 JG |
86 | /* |
87 | * devices contains devices that have had their names assigned. The | |
88 | * devices may not be registered. Users that care about the registration | |
89 | * status need to call ib_device_try_get() on the device to ensure it is | |
90 | * registered, and keep it registered, for the required duration. | |
91 | * | |
92 | */ | |
93 | static DEFINE_XARRAY_FLAGS(devices, XA_FLAGS_ALLOC); | |
921eab11 | 94 | static DECLARE_RWSEM(devices_rwsem); |
0df91bb6 JG |
95 | #define DEVICE_REGISTERED XA_MARK_1 |
96 | ||
9cd58817 | 97 | static u32 highest_client_id; |
e59178d8 JG |
98 | #define CLIENT_REGISTERED XA_MARK_1 |
99 | static DEFINE_XARRAY_FLAGS(clients, XA_FLAGS_ALLOC); | |
921eab11 | 100 | static DECLARE_RWSEM(clients_rwsem); |
1da177e4 | 101 | |
621e55ff JG |
102 | static void ib_client_put(struct ib_client *client) |
103 | { | |
104 | if (refcount_dec_and_test(&client->uses)) | |
105 | complete(&client->uses_zero); | |
106 | } | |
107 | ||
1da177e4 | 108 | /* |
0df91bb6 JG |
109 | * If client_data is registered then the corresponding client must also still |
110 | * be registered. | |
111 | */ | |
112 | #define CLIENT_DATA_REGISTERED XA_MARK_1 | |
4e0f7b90 | 113 | |
1d2fedd8 | 114 | unsigned int rdma_dev_net_id; |
4e0f7b90 PP |
115 | |
116 | /* | |
117 | * A list of net namespaces is maintained in an xarray. This is necessary | |
118 | * because we can't get the locking right using the existing net ns list. We | |
119 | * would require a init_net callback after the list is updated. | |
120 | */ | |
121 | static DEFINE_XARRAY_FLAGS(rdma_nets, XA_FLAGS_ALLOC); | |
122 | /* | |
123 | * rwsem to protect accessing the rdma_nets xarray entries. | |
124 | */ | |
125 | static DECLARE_RWSEM(rdma_nets_rwsem); | |
126 | ||
cb7e0e13 | 127 | bool ib_devices_shared_netns = true; |
a56bc45b PP |
128 | module_param_named(netns_mode, ib_devices_shared_netns, bool, 0444); |
129 | MODULE_PARM_DESC(netns_mode, | |
130 | "Share device among net namespaces; default=1 (shared)"); | |
41c61401 | 131 | /** |
d6537c1a | 132 | * rdma_dev_access_netns() - Return whether an rdma device can be accessed |
41c61401 | 133 | * from a specified net namespace or not. |
d6537c1a | 134 | * @dev: Pointer to rdma device which needs to be checked |
41c61401 PP |
135 | * @net: Pointer to net namesapce for which access to be checked |
136 | * | |
d6537c1a | 137 | * When the rdma device is in shared mode, it ignores the net namespace. |
138 | * When the rdma device is exclusive to a net namespace, rdma device net | |
139 | * namespace is checked against the specified one. | |
41c61401 PP |
140 | */ |
141 | bool rdma_dev_access_netns(const struct ib_device *dev, const struct net *net) | |
142 | { | |
143 | return (ib_devices_shared_netns || | |
144 | net_eq(read_pnet(&dev->coredev.rdma_net), net)); | |
145 | } | |
146 | EXPORT_SYMBOL(rdma_dev_access_netns); | |
147 | ||
0df91bb6 JG |
148 | /* |
149 | * xarray has this behavior where it won't iterate over NULL values stored in | |
150 | * allocated arrays. So we need our own iterator to see all values stored in | |
151 | * the array. This does the same thing as xa_for_each except that it also | |
152 | * returns NULL valued entries if the array is allocating. Simplified to only | |
153 | * work on simple xarrays. | |
154 | */ | |
155 | static void *xan_find_marked(struct xarray *xa, unsigned long *indexp, | |
156 | xa_mark_t filter) | |
157 | { | |
158 | XA_STATE(xas, xa, *indexp); | |
159 | void *entry; | |
160 | ||
161 | rcu_read_lock(); | |
162 | do { | |
163 | entry = xas_find_marked(&xas, ULONG_MAX, filter); | |
164 | if (xa_is_zero(entry)) | |
165 | break; | |
166 | } while (xas_retry(&xas, entry)); | |
167 | rcu_read_unlock(); | |
168 | ||
169 | if (entry) { | |
170 | *indexp = xas.xa_index; | |
171 | if (xa_is_zero(entry)) | |
172 | return NULL; | |
173 | return entry; | |
174 | } | |
175 | return XA_ERROR(-ENOENT); | |
176 | } | |
177 | #define xan_for_each_marked(xa, index, entry, filter) \ | |
178 | for (index = 0, entry = xan_find_marked(xa, &(index), filter); \ | |
179 | !xa_is_err(entry); \ | |
180 | (index)++, entry = xan_find_marked(xa, &(index), filter)) | |
181 | ||
324e227e JG |
182 | /* RCU hash table mapping netdevice pointers to struct ib_port_data */ |
183 | static DEFINE_SPINLOCK(ndev_hash_lock); | |
184 | static DECLARE_HASHTABLE(ndev_hash, 5); | |
185 | ||
c2261dd7 | 186 | static void free_netdevs(struct ib_device *ib_dev); |
d0899892 JG |
187 | static void ib_unregister_work(struct work_struct *work); |
188 | static void __ib_unregister_device(struct ib_device *device); | |
8f408ab6 DJ |
189 | static int ib_security_change(struct notifier_block *nb, unsigned long event, |
190 | void *lsm_data); | |
191 | static void ib_policy_change_task(struct work_struct *work); | |
192 | static DECLARE_WORK(ib_policy_change_work, ib_policy_change_task); | |
193 | ||
923abb9d GP |
194 | static void __ibdev_printk(const char *level, const struct ib_device *ibdev, |
195 | struct va_format *vaf) | |
196 | { | |
197 | if (ibdev && ibdev->dev.parent) | |
198 | dev_printk_emit(level[1] - '0', | |
199 | ibdev->dev.parent, | |
200 | "%s %s %s: %pV", | |
201 | dev_driver_string(ibdev->dev.parent), | |
202 | dev_name(ibdev->dev.parent), | |
203 | dev_name(&ibdev->dev), | |
204 | vaf); | |
205 | else if (ibdev) | |
206 | printk("%s%s: %pV", | |
207 | level, dev_name(&ibdev->dev), vaf); | |
208 | else | |
209 | printk("%s(NULL ib_device): %pV", level, vaf); | |
210 | } | |
211 | ||
212 | void ibdev_printk(const char *level, const struct ib_device *ibdev, | |
213 | const char *format, ...) | |
214 | { | |
215 | struct va_format vaf; | |
216 | va_list args; | |
217 | ||
218 | va_start(args, format); | |
219 | ||
220 | vaf.fmt = format; | |
221 | vaf.va = &args; | |
222 | ||
223 | __ibdev_printk(level, ibdev, &vaf); | |
224 | ||
225 | va_end(args); | |
226 | } | |
227 | EXPORT_SYMBOL(ibdev_printk); | |
228 | ||
229 | #define define_ibdev_printk_level(func, level) \ | |
230 | void func(const struct ib_device *ibdev, const char *fmt, ...) \ | |
231 | { \ | |
232 | struct va_format vaf; \ | |
233 | va_list args; \ | |
234 | \ | |
235 | va_start(args, fmt); \ | |
236 | \ | |
237 | vaf.fmt = fmt; \ | |
238 | vaf.va = &args; \ | |
239 | \ | |
240 | __ibdev_printk(level, ibdev, &vaf); \ | |
241 | \ | |
242 | va_end(args); \ | |
243 | } \ | |
244 | EXPORT_SYMBOL(func); | |
245 | ||
246 | define_ibdev_printk_level(ibdev_emerg, KERN_EMERG); | |
247 | define_ibdev_printk_level(ibdev_alert, KERN_ALERT); | |
248 | define_ibdev_printk_level(ibdev_crit, KERN_CRIT); | |
249 | define_ibdev_printk_level(ibdev_err, KERN_ERR); | |
250 | define_ibdev_printk_level(ibdev_warn, KERN_WARNING); | |
251 | define_ibdev_printk_level(ibdev_notice, KERN_NOTICE); | |
252 | define_ibdev_printk_level(ibdev_info, KERN_INFO); | |
253 | ||
8f408ab6 DJ |
254 | static struct notifier_block ibdev_lsm_nb = { |
255 | .notifier_call = ib_security_change, | |
256 | }; | |
1da177e4 | 257 | |
decbc7a6 PP |
258 | static int rdma_dev_change_netns(struct ib_device *device, struct net *cur_net, |
259 | struct net *net); | |
260 | ||
324e227e JG |
261 | /* Pointer to the RCU head at the start of the ib_port_data array */ |
262 | struct ib_port_data_rcu { | |
263 | struct rcu_head rcu_head; | |
264 | struct ib_port_data pdata[]; | |
265 | }; | |
266 | ||
deee3c7e | 267 | static void ib_device_check_mandatory(struct ib_device *device) |
1da177e4 | 268 | { |
3023a1e9 | 269 | #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device_ops, x), #x } |
1da177e4 LT |
270 | static const struct { |
271 | size_t offset; | |
272 | char *name; | |
273 | } mandatory_table[] = { | |
274 | IB_MANDATORY_FUNC(query_device), | |
275 | IB_MANDATORY_FUNC(query_port), | |
1da177e4 LT |
276 | IB_MANDATORY_FUNC(alloc_pd), |
277 | IB_MANDATORY_FUNC(dealloc_pd), | |
1da177e4 LT |
278 | IB_MANDATORY_FUNC(create_qp), |
279 | IB_MANDATORY_FUNC(modify_qp), | |
280 | IB_MANDATORY_FUNC(destroy_qp), | |
281 | IB_MANDATORY_FUNC(post_send), | |
282 | IB_MANDATORY_FUNC(post_recv), | |
283 | IB_MANDATORY_FUNC(create_cq), | |
284 | IB_MANDATORY_FUNC(destroy_cq), | |
285 | IB_MANDATORY_FUNC(poll_cq), | |
286 | IB_MANDATORY_FUNC(req_notify_cq), | |
287 | IB_MANDATORY_FUNC(get_dma_mr), | |
44ce37bc | 288 | IB_MANDATORY_FUNC(reg_user_mr), |
7738613e IW |
289 | IB_MANDATORY_FUNC(dereg_mr), |
290 | IB_MANDATORY_FUNC(get_port_immutable) | |
1da177e4 LT |
291 | }; |
292 | int i; | |
293 | ||
6780c4fa | 294 | device->kverbs_provider = true; |
9a6b090c | 295 | for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { |
3023a1e9 KH |
296 | if (!*(void **) ((void *) &device->ops + |
297 | mandatory_table[i].offset)) { | |
6780c4fa GP |
298 | device->kverbs_provider = false; |
299 | break; | |
1da177e4 LT |
300 | } |
301 | } | |
1da177e4 LT |
302 | } |
303 | ||
f8978bd9 | 304 | /* |
01b67117 PP |
305 | * Caller must perform ib_device_put() to return the device reference count |
306 | * when ib_device_get_by_index() returns valid device pointer. | |
f8978bd9 | 307 | */ |
37eeab55 | 308 | struct ib_device *ib_device_get_by_index(const struct net *net, u32 index) |
f8978bd9 LR |
309 | { |
310 | struct ib_device *device; | |
311 | ||
921eab11 | 312 | down_read(&devices_rwsem); |
0df91bb6 | 313 | device = xa_load(&devices, index); |
01b67117 | 314 | if (device) { |
37eeab55 PP |
315 | if (!rdma_dev_access_netns(device, net)) { |
316 | device = NULL; | |
317 | goto out; | |
318 | } | |
319 | ||
d79af724 | 320 | if (!ib_device_try_get(device)) |
01b67117 PP |
321 | device = NULL; |
322 | } | |
37eeab55 | 323 | out: |
921eab11 | 324 | up_read(&devices_rwsem); |
f8978bd9 LR |
325 | return device; |
326 | } | |
327 | ||
d79af724 JG |
328 | /** |
329 | * ib_device_put - Release IB device reference | |
330 | * @device: device whose reference to be released | |
331 | * | |
332 | * ib_device_put() releases reference to the IB device to allow it to be | |
333 | * unregistered and eventually free. | |
334 | */ | |
01b67117 PP |
335 | void ib_device_put(struct ib_device *device) |
336 | { | |
337 | if (refcount_dec_and_test(&device->refcount)) | |
338 | complete(&device->unreg_completion); | |
339 | } | |
d79af724 | 340 | EXPORT_SYMBOL(ib_device_put); |
01b67117 | 341 | |
1da177e4 LT |
342 | static struct ib_device *__ib_device_get_by_name(const char *name) |
343 | { | |
344 | struct ib_device *device; | |
0df91bb6 | 345 | unsigned long index; |
1da177e4 | 346 | |
0df91bb6 | 347 | xa_for_each (&devices, index, device) |
896de009 | 348 | if (!strcmp(name, dev_name(&device->dev))) |
1da177e4 LT |
349 | return device; |
350 | ||
351 | return NULL; | |
352 | } | |
353 | ||
6cc2c8e5 JG |
354 | /** |
355 | * ib_device_get_by_name - Find an IB device by name | |
356 | * @name: The name to look for | |
357 | * @driver_id: The driver ID that must match (RDMA_DRIVER_UNKNOWN matches all) | |
358 | * | |
359 | * Find and hold an ib_device by its name. The caller must call | |
360 | * ib_device_put() on the returned pointer. | |
361 | */ | |
362 | struct ib_device *ib_device_get_by_name(const char *name, | |
363 | enum rdma_driver_id driver_id) | |
364 | { | |
365 | struct ib_device *device; | |
366 | ||
367 | down_read(&devices_rwsem); | |
368 | device = __ib_device_get_by_name(name); | |
369 | if (device && driver_id != RDMA_DRIVER_UNKNOWN && | |
b9560a41 | 370 | device->ops.driver_id != driver_id) |
6cc2c8e5 JG |
371 | device = NULL; |
372 | ||
373 | if (device) { | |
374 | if (!ib_device_try_get(device)) | |
375 | device = NULL; | |
376 | } | |
377 | up_read(&devices_rwsem); | |
378 | return device; | |
379 | } | |
380 | EXPORT_SYMBOL(ib_device_get_by_name); | |
381 | ||
4e0f7b90 PP |
382 | static int rename_compat_devs(struct ib_device *device) |
383 | { | |
384 | struct ib_core_device *cdev; | |
385 | unsigned long index; | |
386 | int ret = 0; | |
387 | ||
388 | mutex_lock(&device->compat_devs_mutex); | |
389 | xa_for_each (&device->compat_devs, index, cdev) { | |
390 | ret = device_rename(&cdev->dev, dev_name(&device->dev)); | |
391 | if (ret) { | |
392 | dev_warn(&cdev->dev, | |
393 | "Fail to rename compatdev to new name %s\n", | |
394 | dev_name(&device->dev)); | |
395 | break; | |
396 | } | |
397 | } | |
398 | mutex_unlock(&device->compat_devs_mutex); | |
399 | return ret; | |
400 | } | |
401 | ||
d21943dd LR |
402 | int ib_device_rename(struct ib_device *ibdev, const char *name) |
403 | { | |
dc1435c0 LR |
404 | unsigned long index; |
405 | void *client_data; | |
e3593b56 | 406 | int ret; |
d21943dd | 407 | |
921eab11 | 408 | down_write(&devices_rwsem); |
e3593b56 | 409 | if (!strcmp(name, dev_name(&ibdev->dev))) { |
dc1435c0 LR |
410 | up_write(&devices_rwsem); |
411 | return 0; | |
e3593b56 JG |
412 | } |
413 | ||
344684e6 | 414 | if (__ib_device_get_by_name(name)) { |
dc1435c0 LR |
415 | up_write(&devices_rwsem); |
416 | return -EEXIST; | |
d21943dd LR |
417 | } |
418 | ||
419 | ret = device_rename(&ibdev->dev, name); | |
dc1435c0 LR |
420 | if (ret) { |
421 | up_write(&devices_rwsem); | |
422 | return ret; | |
423 | } | |
424 | ||
2c34bb6d | 425 | strscpy(ibdev->name, name, IB_DEVICE_NAME_MAX); |
4e0f7b90 | 426 | ret = rename_compat_devs(ibdev); |
dc1435c0 LR |
427 | |
428 | downgrade_write(&devices_rwsem); | |
429 | down_read(&ibdev->client_data_rwsem); | |
430 | xan_for_each_marked(&ibdev->client_data, index, client_data, | |
431 | CLIENT_DATA_REGISTERED) { | |
432 | struct ib_client *client = xa_load(&clients, index); | |
433 | ||
434 | if (!client || !client->rename) | |
435 | continue; | |
436 | ||
437 | client->rename(ibdev, client_data); | |
438 | } | |
439 | up_read(&ibdev->client_data_rwsem); | |
440 | up_read(&devices_rwsem); | |
441 | return 0; | |
d21943dd LR |
442 | } |
443 | ||
f8fc8cd9 YF |
444 | int ib_device_set_dim(struct ib_device *ibdev, u8 use_dim) |
445 | { | |
446 | if (use_dim > 1) | |
447 | return -EINVAL; | |
448 | ibdev->use_cq_dim = use_dim; | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
e349f858 | 453 | static int alloc_name(struct ib_device *ibdev, const char *name) |
1da177e4 | 454 | { |
1da177e4 | 455 | struct ib_device *device; |
0df91bb6 | 456 | unsigned long index; |
3b88afd3 JG |
457 | struct ida inuse; |
458 | int rc; | |
1da177e4 LT |
459 | int i; |
460 | ||
9ffbe8ac | 461 | lockdep_assert_held_write(&devices_rwsem); |
3b88afd3 | 462 | ida_init(&inuse); |
0df91bb6 | 463 | xa_for_each (&devices, index, device) { |
e349f858 JG |
464 | char buf[IB_DEVICE_NAME_MAX]; |
465 | ||
896de009 | 466 | if (sscanf(dev_name(&device->dev), name, &i) != 1) |
1da177e4 | 467 | continue; |
3b88afd3 | 468 | if (i < 0 || i >= INT_MAX) |
1da177e4 LT |
469 | continue; |
470 | snprintf(buf, sizeof buf, name, i); | |
3b88afd3 JG |
471 | if (strcmp(buf, dev_name(&device->dev)) != 0) |
472 | continue; | |
473 | ||
474 | rc = ida_alloc_range(&inuse, i, i, GFP_KERNEL); | |
475 | if (rc < 0) | |
476 | goto out; | |
1da177e4 LT |
477 | } |
478 | ||
3b88afd3 JG |
479 | rc = ida_alloc(&inuse, GFP_KERNEL); |
480 | if (rc < 0) | |
481 | goto out; | |
1da177e4 | 482 | |
3b88afd3 JG |
483 | rc = dev_set_name(&ibdev->dev, name, rc); |
484 | out: | |
485 | ida_destroy(&inuse); | |
486 | return rc; | |
1da177e4 LT |
487 | } |
488 | ||
55aeed06 JG |
489 | static void ib_device_release(struct device *device) |
490 | { | |
491 | struct ib_device *dev = container_of(device, struct ib_device, dev); | |
492 | ||
c2261dd7 | 493 | free_netdevs(dev); |
652432f3 | 494 | WARN_ON(refcount_read(&dev->refcount)); |
b7066b32 JG |
495 | if (dev->hw_stats_data) |
496 | ib_device_release_hw_stats(dev->hw_stats_data); | |
46bdf370 KH |
497 | if (dev->port_data) { |
498 | ib_cache_release_one(dev); | |
499 | ib_security_release_port_pkey_list(dev); | |
413d3347 | 500 | rdma_counter_release(dev); |
324e227e JG |
501 | kfree_rcu(container_of(dev->port_data, struct ib_port_data_rcu, |
502 | pdata[0]), | |
503 | rcu_head); | |
46bdf370 | 504 | } |
413d3347 | 505 | |
56594ae1 PP |
506 | mutex_destroy(&dev->unregistration_lock); |
507 | mutex_destroy(&dev->compat_devs_mutex); | |
508 | ||
46bdf370 KH |
509 | xa_destroy(&dev->compat_devs); |
510 | xa_destroy(&dev->client_data); | |
324e227e | 511 | kfree_rcu(dev, rcu_head); |
55aeed06 JG |
512 | } |
513 | ||
23680f0b | 514 | static int ib_device_uevent(const struct device *device, |
55aeed06 JG |
515 | struct kobj_uevent_env *env) |
516 | { | |
896de009 | 517 | if (add_uevent_var(env, "NAME=%s", dev_name(device))) |
55aeed06 JG |
518 | return -ENOMEM; |
519 | ||
520 | /* | |
521 | * It would be nice to pass the node GUID with the event... | |
522 | */ | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
fa627348 | 527 | static const void *net_namespace(const struct device *d) |
62dfa795 | 528 | { |
fa627348 | 529 | const struct ib_core_device *coredev = |
4e0f7b90 PP |
530 | container_of(d, struct ib_core_device, dev); |
531 | ||
532 | return read_pnet(&coredev->rdma_net); | |
62dfa795 PP |
533 | } |
534 | ||
55aeed06 JG |
535 | static struct class ib_class = { |
536 | .name = "infiniband", | |
537 | .dev_release = ib_device_release, | |
538 | .dev_uevent = ib_device_uevent, | |
62dfa795 PP |
539 | .ns_type = &net_ns_type_operations, |
540 | .namespace = net_namespace, | |
55aeed06 JG |
541 | }; |
542 | ||
cebe556b | 543 | static void rdma_init_coredev(struct ib_core_device *coredev, |
4e0f7b90 | 544 | struct ib_device *dev, struct net *net) |
cebe556b PP |
545 | { |
546 | /* This BUILD_BUG_ON is intended to catch layout change | |
547 | * of union of ib_core_device and device. | |
548 | * dev must be the first element as ib_core and providers | |
549 | * driver uses it. Adding anything in ib_core_device before | |
550 | * device will break this assumption. | |
551 | */ | |
552 | BUILD_BUG_ON(offsetof(struct ib_device, coredev.dev) != | |
553 | offsetof(struct ib_device, dev)); | |
554 | ||
555 | coredev->dev.class = &ib_class; | |
556 | coredev->dev.groups = dev->groups; | |
557 | device_initialize(&coredev->dev); | |
558 | coredev->owner = dev; | |
559 | INIT_LIST_HEAD(&coredev->port_list); | |
4e0f7b90 | 560 | write_pnet(&coredev->rdma_net, net); |
cebe556b PP |
561 | } |
562 | ||
1da177e4 | 563 | /** |
459cc69f | 564 | * _ib_alloc_device - allocate an IB device struct |
1da177e4 LT |
565 | * @size:size of structure to allocate |
566 | * | |
567 | * Low-level drivers should use ib_alloc_device() to allocate &struct | |
568 | * ib_device. @size is the size of the structure to be allocated, | |
569 | * including any private data used by the low-level driver. | |
570 | * ib_dealloc_device() must be used to free structures allocated with | |
571 | * ib_alloc_device(). | |
572 | */ | |
459cc69f | 573 | struct ib_device *_ib_alloc_device(size_t size) |
1da177e4 | 574 | { |
55aeed06 | 575 | struct ib_device *device; |
286e1d3f | 576 | unsigned int i; |
55aeed06 JG |
577 | |
578 | if (WARN_ON(size < sizeof(struct ib_device))) | |
579 | return NULL; | |
580 | ||
581 | device = kzalloc(size, GFP_KERNEL); | |
582 | if (!device) | |
583 | return NULL; | |
584 | ||
41eda65c LR |
585 | if (rdma_restrack_init(device)) { |
586 | kfree(device); | |
587 | return NULL; | |
588 | } | |
02d8883f | 589 | |
4e0f7b90 | 590 | rdma_init_coredev(&device->coredev, device, &init_net); |
55aeed06 | 591 | |
55aeed06 | 592 | INIT_LIST_HEAD(&device->event_handler_list); |
40adf686 | 593 | spin_lock_init(&device->qp_open_list_lock); |
6b57cea9 | 594 | init_rwsem(&device->event_handler_rwsem); |
d0899892 | 595 | mutex_init(&device->unregistration_lock); |
0df91bb6 JG |
596 | /* |
597 | * client_data needs to be alloc because we don't want our mark to be | |
598 | * destroyed if the user stores NULL in the client data. | |
599 | */ | |
600 | xa_init_flags(&device->client_data, XA_FLAGS_ALLOC); | |
921eab11 | 601 | init_rwsem(&device->client_data_rwsem); |
4e0f7b90 PP |
602 | xa_init_flags(&device->compat_devs, XA_FLAGS_ALLOC); |
603 | mutex_init(&device->compat_devs_mutex); | |
01b67117 | 604 | init_completion(&device->unreg_completion); |
d0899892 | 605 | INIT_WORK(&device->unregistration_work, ib_unregister_work); |
1da177e4 | 606 | |
286e1d3f JM |
607 | spin_lock_init(&device->cq_pools_lock); |
608 | for (i = 0; i < ARRAY_SIZE(device->cq_pools); i++) | |
609 | INIT_LIST_HEAD(&device->cq_pools[i]); | |
610 | ||
36721a6d AK |
611 | rwlock_init(&device->cache_lock); |
612 | ||
c074bb1e | 613 | device->uverbs_cmd_mask = |
44ce37bc | 614 | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_MW) | |
c074bb1e | 615 | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD) | |
44ce37bc JG |
616 | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST) | |
617 | BIT_ULL(IB_USER_VERBS_CMD_CLOSE_XRCD) | | |
676a80ad | 618 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH) | |
c074bb1e JG |
619 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | |
620 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ) | | |
621 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP) | | |
44ce37bc | 622 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ) | |
652caba5 | 623 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_XSRQ) | |
44ce37bc | 624 | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_MW) | |
c074bb1e JG |
625 | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD) | |
626 | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR) | | |
676a80ad | 627 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH) | |
c074bb1e JG |
628 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ) | |
629 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP) | | |
44ce37bc JG |
630 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ) | |
631 | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST) | | |
c074bb1e JG |
632 | BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT) | |
633 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP) | | |
44ce37bc JG |
634 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ) | |
635 | BIT_ULL(IB_USER_VERBS_CMD_OPEN_QP) | | |
636 | BIT_ULL(IB_USER_VERBS_CMD_OPEN_XRCD) | | |
c074bb1e JG |
637 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE) | |
638 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT) | | |
639 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP) | | |
44ce37bc JG |
640 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ) | |
641 | BIT_ULL(IB_USER_VERBS_CMD_REG_MR) | | |
642 | BIT_ULL(IB_USER_VERBS_CMD_REREG_MR) | | |
643 | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ); | |
55aeed06 | 644 | return device; |
1da177e4 | 645 | } |
459cc69f | 646 | EXPORT_SYMBOL(_ib_alloc_device); |
1da177e4 LT |
647 | |
648 | /** | |
649 | * ib_dealloc_device - free an IB device struct | |
650 | * @device:structure to free | |
651 | * | |
652 | * Free a structure allocated with ib_alloc_device(). | |
653 | */ | |
654 | void ib_dealloc_device(struct ib_device *device) | |
655 | { | |
d0899892 JG |
656 | if (device->ops.dealloc_driver) |
657 | device->ops.dealloc_driver(device); | |
658 | ||
659 | /* | |
660 | * ib_unregister_driver() requires all devices to remain in the xarray | |
661 | * while their ops are callable. The last op we call is dealloc_driver | |
662 | * above. This is needed to create a fence on op callbacks prior to | |
663 | * allowing the driver module to unload. | |
664 | */ | |
665 | down_write(&devices_rwsem); | |
666 | if (xa_load(&devices, device->index) == device) | |
667 | xa_erase(&devices, device->index); | |
668 | up_write(&devices_rwsem); | |
669 | ||
c2261dd7 JG |
670 | /* Expedite releasing netdev references */ |
671 | free_netdevs(device); | |
672 | ||
4e0f7b90 | 673 | WARN_ON(!xa_empty(&device->compat_devs)); |
0df91bb6 | 674 | WARN_ON(!xa_empty(&device->client_data)); |
652432f3 | 675 | WARN_ON(refcount_read(&device->refcount)); |
0ad699c0 | 676 | rdma_restrack_clean(device); |
e155755e | 677 | /* Balances with device_initialize */ |
924b8900 | 678 | put_device(&device->dev); |
1da177e4 LT |
679 | } |
680 | EXPORT_SYMBOL(ib_dealloc_device); | |
681 | ||
921eab11 JG |
682 | /* |
683 | * add_client_context() and remove_client_context() must be safe against | |
684 | * parallel calls on the same device - registration/unregistration of both the | |
685 | * device and client can be occurring in parallel. | |
686 | * | |
687 | * The routines need to be a fence, any caller must not return until the add | |
688 | * or remove is fully completed. | |
689 | */ | |
690 | static int add_client_context(struct ib_device *device, | |
691 | struct ib_client *client) | |
1da177e4 | 692 | { |
921eab11 | 693 | int ret = 0; |
1da177e4 | 694 | |
6780c4fa | 695 | if (!device->kverbs_provider && !client->no_kverbs_req) |
921eab11 JG |
696 | return 0; |
697 | ||
698 | down_write(&device->client_data_rwsem); | |
621e55ff JG |
699 | /* |
700 | * So long as the client is registered hold both the client and device | |
701 | * unregistration locks. | |
702 | */ | |
703 | if (!refcount_inc_not_zero(&client->uses)) | |
704 | goto out_unlock; | |
705 | refcount_inc(&device->refcount); | |
706 | ||
921eab11 JG |
707 | /* |
708 | * Another caller to add_client_context got here first and has already | |
709 | * completely initialized context. | |
710 | */ | |
711 | if (xa_get_mark(&device->client_data, client->client_id, | |
712 | CLIENT_DATA_REGISTERED)) | |
713 | goto out; | |
714 | ||
715 | ret = xa_err(xa_store(&device->client_data, client->client_id, NULL, | |
716 | GFP_KERNEL)); | |
717 | if (ret) | |
718 | goto out; | |
719 | downgrade_write(&device->client_data_rwsem); | |
11a0ae4c JG |
720 | if (client->add) { |
721 | if (client->add(device)) { | |
722 | /* | |
723 | * If a client fails to add then the error code is | |
724 | * ignored, but we won't call any more ops on this | |
725 | * client. | |
726 | */ | |
727 | xa_erase(&device->client_data, client->client_id); | |
728 | up_read(&device->client_data_rwsem); | |
729 | ib_device_put(device); | |
730 | ib_client_put(client); | |
731 | return 0; | |
732 | } | |
733 | } | |
921eab11 JG |
734 | |
735 | /* Readers shall not see a client until add has been completed */ | |
736 | xa_set_mark(&device->client_data, client->client_id, | |
737 | CLIENT_DATA_REGISTERED); | |
738 | up_read(&device->client_data_rwsem); | |
739 | return 0; | |
740 | ||
741 | out: | |
621e55ff JG |
742 | ib_device_put(device); |
743 | ib_client_put(client); | |
744 | out_unlock: | |
921eab11 JG |
745 | up_write(&device->client_data_rwsem); |
746 | return ret; | |
747 | } | |
748 | ||
749 | static void remove_client_context(struct ib_device *device, | |
750 | unsigned int client_id) | |
751 | { | |
752 | struct ib_client *client; | |
753 | void *client_data; | |
6780c4fa | 754 | |
921eab11 JG |
755 | down_write(&device->client_data_rwsem); |
756 | if (!xa_get_mark(&device->client_data, client_id, | |
757 | CLIENT_DATA_REGISTERED)) { | |
758 | up_write(&device->client_data_rwsem); | |
759 | return; | |
760 | } | |
761 | client_data = xa_load(&device->client_data, client_id); | |
762 | xa_clear_mark(&device->client_data, client_id, CLIENT_DATA_REGISTERED); | |
763 | client = xa_load(&clients, client_id); | |
621e55ff | 764 | up_write(&device->client_data_rwsem); |
1da177e4 | 765 | |
921eab11 JG |
766 | /* |
767 | * Notice we cannot be holding any exclusive locks when calling the | |
768 | * remove callback as the remove callback can recurse back into any | |
769 | * public functions in this module and thus try for any locks those | |
770 | * functions take. | |
771 | * | |
772 | * For this reason clients and drivers should not call the | |
773 | * unregistration functions will holdling any locks. | |
921eab11 JG |
774 | */ |
775 | if (client->remove) | |
776 | client->remove(device, client_data); | |
777 | ||
778 | xa_erase(&device->client_data, client_id); | |
621e55ff JG |
779 | ib_device_put(device); |
780 | ib_client_put(client); | |
1da177e4 LT |
781 | } |
782 | ||
c2261dd7 | 783 | static int alloc_port_data(struct ib_device *device) |
5eb620c8 | 784 | { |
324e227e | 785 | struct ib_port_data_rcu *pdata_rcu; |
1fb7f897 | 786 | u32 port; |
c2261dd7 JG |
787 | |
788 | if (device->port_data) | |
789 | return 0; | |
790 | ||
791 | /* This can only be called once the physical port range is defined */ | |
792 | if (WARN_ON(!device->phys_port_cnt)) | |
793 | return -EINVAL; | |
7738613e | 794 | |
1fb7f897 MB |
795 | /* Reserve U32_MAX so the logic to go over all the ports is sane */ |
796 | if (WARN_ON(device->phys_port_cnt == U32_MAX)) | |
797 | return -EINVAL; | |
798 | ||
8ceb1357 JG |
799 | /* |
800 | * device->port_data is indexed directly by the port number to make | |
7738613e IW |
801 | * access to this data as efficient as possible. |
802 | * | |
8ceb1357 JG |
803 | * Therefore port_data is declared as a 1 based array with potential |
804 | * empty slots at the beginning. | |
7738613e | 805 | */ |
324e227e | 806 | pdata_rcu = kzalloc(struct_size(pdata_rcu, pdata, |
81760bed | 807 | size_add(rdma_end_port(device), 1)), |
324e227e JG |
808 | GFP_KERNEL); |
809 | if (!pdata_rcu) | |
55aeed06 | 810 | return -ENOMEM; |
324e227e JG |
811 | /* |
812 | * The rcu_head is put in front of the port data array and the stored | |
813 | * pointer is adjusted since we never need to see that member until | |
814 | * kfree_rcu. | |
815 | */ | |
816 | device->port_data = pdata_rcu->pdata; | |
5eb620c8 | 817 | |
ea1075ed | 818 | rdma_for_each_port (device, port) { |
8ceb1357 JG |
819 | struct ib_port_data *pdata = &device->port_data[port]; |
820 | ||
324e227e | 821 | pdata->ib_dev = device; |
8ceb1357 JG |
822 | spin_lock_init(&pdata->pkey_list_lock); |
823 | INIT_LIST_HEAD(&pdata->pkey_list); | |
c2261dd7 | 824 | spin_lock_init(&pdata->netdev_lock); |
324e227e | 825 | INIT_HLIST_NODE(&pdata->ndev_hash_link); |
c2261dd7 JG |
826 | } |
827 | return 0; | |
828 | } | |
829 | ||
1fb7f897 | 830 | static int verify_immutable(const struct ib_device *dev, u32 port) |
c2261dd7 JG |
831 | { |
832 | return WARN_ON(!rdma_cap_ib_mad(dev, port) && | |
833 | rdma_max_mad_size(dev, port) != 0); | |
834 | } | |
835 | ||
836 | static int setup_port_data(struct ib_device *device) | |
837 | { | |
1fb7f897 | 838 | u32 port; |
c2261dd7 JG |
839 | int ret; |
840 | ||
841 | ret = alloc_port_data(device); | |
842 | if (ret) | |
843 | return ret; | |
844 | ||
845 | rdma_for_each_port (device, port) { | |
846 | struct ib_port_data *pdata = &device->port_data[port]; | |
8ceb1357 JG |
847 | |
848 | ret = device->ops.get_port_immutable(device, port, | |
849 | &pdata->immutable); | |
5eb620c8 | 850 | if (ret) |
55aeed06 | 851 | return ret; |
337877a4 | 852 | |
55aeed06 JG |
853 | if (verify_immutable(device, port)) |
854 | return -EINVAL; | |
5eb620c8 | 855 | } |
55aeed06 | 856 | return 0; |
5eb620c8 YE |
857 | } |
858 | ||
7416790e PP |
859 | /** |
860 | * ib_port_immutable_read() - Read rdma port's immutable data | |
168e4cd9 LR |
861 | * @dev: IB device |
862 | * @port: port number whose immutable data to read. It starts with index 1 and | |
863 | * valid upto including rdma_end_port(). | |
7416790e PP |
864 | */ |
865 | const struct ib_port_immutable* | |
866 | ib_port_immutable_read(struct ib_device *dev, unsigned int port) | |
867 | { | |
868 | WARN_ON(!rdma_is_port_valid(dev, port)); | |
869 | return &dev->port_data[port].immutable; | |
870 | } | |
871 | EXPORT_SYMBOL(ib_port_immutable_read); | |
872 | ||
9abb0d1b | 873 | void ib_get_device_fw_str(struct ib_device *dev, char *str) |
5fa76c20 | 874 | { |
3023a1e9 KH |
875 | if (dev->ops.get_dev_fw_str) |
876 | dev->ops.get_dev_fw_str(dev, str); | |
5fa76c20 IW |
877 | else |
878 | str[0] = '\0'; | |
879 | } | |
880 | EXPORT_SYMBOL(ib_get_device_fw_str); | |
881 | ||
8f408ab6 DJ |
882 | static void ib_policy_change_task(struct work_struct *work) |
883 | { | |
884 | struct ib_device *dev; | |
0df91bb6 | 885 | unsigned long index; |
8f408ab6 | 886 | |
921eab11 | 887 | down_read(&devices_rwsem); |
0df91bb6 | 888 | xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) { |
ea1075ed | 889 | unsigned int i; |
8f408ab6 | 890 | |
ea1075ed | 891 | rdma_for_each_port (dev, i) { |
8f408ab6 | 892 | u64 sp; |
c5f8f2c5 AK |
893 | ib_get_cached_subnet_prefix(dev, i, &sp); |
894 | ib_security_cache_change(dev, i, sp); | |
8f408ab6 DJ |
895 | } |
896 | } | |
921eab11 | 897 | up_read(&devices_rwsem); |
8f408ab6 DJ |
898 | } |
899 | ||
900 | static int ib_security_change(struct notifier_block *nb, unsigned long event, | |
901 | void *lsm_data) | |
902 | { | |
903 | if (event != LSM_POLICY_CHANGE) | |
904 | return NOTIFY_DONE; | |
905 | ||
906 | schedule_work(&ib_policy_change_work); | |
c66f6741 | 907 | ib_mad_agent_security_change(); |
8f408ab6 DJ |
908 | |
909 | return NOTIFY_OK; | |
910 | } | |
911 | ||
4e0f7b90 PP |
912 | static void compatdev_release(struct device *dev) |
913 | { | |
914 | struct ib_core_device *cdev = | |
915 | container_of(dev, struct ib_core_device, dev); | |
916 | ||
917 | kfree(cdev); | |
918 | } | |
919 | ||
920 | static int add_one_compat_dev(struct ib_device *device, | |
921 | struct rdma_dev_net *rnet) | |
922 | { | |
923 | struct ib_core_device *cdev; | |
924 | int ret; | |
925 | ||
2b34c558 | 926 | lockdep_assert_held(&rdma_nets_rwsem); |
a56bc45b PP |
927 | if (!ib_devices_shared_netns) |
928 | return 0; | |
929 | ||
4e0f7b90 PP |
930 | /* |
931 | * Create and add compat device in all namespaces other than where it | |
932 | * is currently bound to. | |
933 | */ | |
934 | if (net_eq(read_pnet(&rnet->net), | |
935 | read_pnet(&device->coredev.rdma_net))) | |
936 | return 0; | |
937 | ||
938 | /* | |
939 | * The first of init_net() or ib_register_device() to take the | |
940 | * compat_devs_mutex wins and gets to add the device. Others will wait | |
941 | * for completion here. | |
942 | */ | |
943 | mutex_lock(&device->compat_devs_mutex); | |
944 | cdev = xa_load(&device->compat_devs, rnet->id); | |
945 | if (cdev) { | |
946 | ret = 0; | |
947 | goto done; | |
948 | } | |
949 | ret = xa_reserve(&device->compat_devs, rnet->id, GFP_KERNEL); | |
950 | if (ret) | |
951 | goto done; | |
952 | ||
953 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); | |
954 | if (!cdev) { | |
955 | ret = -ENOMEM; | |
956 | goto cdev_err; | |
957 | } | |
958 | ||
959 | cdev->dev.parent = device->dev.parent; | |
960 | rdma_init_coredev(cdev, device, read_pnet(&rnet->net)); | |
961 | cdev->dev.release = compatdev_release; | |
f2f2b3bb JG |
962 | ret = dev_set_name(&cdev->dev, "%s", dev_name(&device->dev)); |
963 | if (ret) | |
964 | goto add_err; | |
4e0f7b90 PP |
965 | |
966 | ret = device_add(&cdev->dev); | |
967 | if (ret) | |
968 | goto add_err; | |
eb15c78b | 969 | ret = ib_setup_port_attrs(cdev); |
5417783e PP |
970 | if (ret) |
971 | goto port_err; | |
4e0f7b90 PP |
972 | |
973 | ret = xa_err(xa_store(&device->compat_devs, rnet->id, | |
974 | cdev, GFP_KERNEL)); | |
975 | if (ret) | |
976 | goto insert_err; | |
977 | ||
978 | mutex_unlock(&device->compat_devs_mutex); | |
979 | return 0; | |
980 | ||
981 | insert_err: | |
5417783e PP |
982 | ib_free_port_attrs(cdev); |
983 | port_err: | |
4e0f7b90 PP |
984 | device_del(&cdev->dev); |
985 | add_err: | |
986 | put_device(&cdev->dev); | |
987 | cdev_err: | |
988 | xa_release(&device->compat_devs, rnet->id); | |
989 | done: | |
990 | mutex_unlock(&device->compat_devs_mutex); | |
991 | return ret; | |
992 | } | |
993 | ||
994 | static void remove_one_compat_dev(struct ib_device *device, u32 id) | |
995 | { | |
996 | struct ib_core_device *cdev; | |
997 | ||
998 | mutex_lock(&device->compat_devs_mutex); | |
999 | cdev = xa_erase(&device->compat_devs, id); | |
1000 | mutex_unlock(&device->compat_devs_mutex); | |
1001 | if (cdev) { | |
5417783e | 1002 | ib_free_port_attrs(cdev); |
4e0f7b90 PP |
1003 | device_del(&cdev->dev); |
1004 | put_device(&cdev->dev); | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | static void remove_compat_devs(struct ib_device *device) | |
1009 | { | |
1010 | struct ib_core_device *cdev; | |
1011 | unsigned long index; | |
1012 | ||
1013 | xa_for_each (&device->compat_devs, index, cdev) | |
1014 | remove_one_compat_dev(device, index); | |
1015 | } | |
1016 | ||
1017 | static int add_compat_devs(struct ib_device *device) | |
1018 | { | |
1019 | struct rdma_dev_net *rnet; | |
1020 | unsigned long index; | |
1021 | int ret = 0; | |
1022 | ||
decbc7a6 PP |
1023 | lockdep_assert_held(&devices_rwsem); |
1024 | ||
4e0f7b90 PP |
1025 | down_read(&rdma_nets_rwsem); |
1026 | xa_for_each (&rdma_nets, index, rnet) { | |
1027 | ret = add_one_compat_dev(device, rnet); | |
1028 | if (ret) | |
1029 | break; | |
1030 | } | |
1031 | up_read(&rdma_nets_rwsem); | |
1032 | return ret; | |
1033 | } | |
1034 | ||
2b34c558 PP |
1035 | static void remove_all_compat_devs(void) |
1036 | { | |
1037 | struct ib_compat_device *cdev; | |
1038 | struct ib_device *dev; | |
1039 | unsigned long index; | |
1040 | ||
1041 | down_read(&devices_rwsem); | |
1042 | xa_for_each (&devices, index, dev) { | |
1043 | unsigned long c_index = 0; | |
1044 | ||
1045 | /* Hold nets_rwsem so that any other thread modifying this | |
1046 | * system param can sync with this thread. | |
1047 | */ | |
1048 | down_read(&rdma_nets_rwsem); | |
1049 | xa_for_each (&dev->compat_devs, c_index, cdev) | |
1050 | remove_one_compat_dev(dev, c_index); | |
1051 | up_read(&rdma_nets_rwsem); | |
1052 | } | |
1053 | up_read(&devices_rwsem); | |
1054 | } | |
1055 | ||
1056 | static int add_all_compat_devs(void) | |
1057 | { | |
1058 | struct rdma_dev_net *rnet; | |
1059 | struct ib_device *dev; | |
1060 | unsigned long index; | |
1061 | int ret = 0; | |
1062 | ||
1063 | down_read(&devices_rwsem); | |
1064 | xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) { | |
1065 | unsigned long net_index = 0; | |
1066 | ||
1067 | /* Hold nets_rwsem so that any other thread modifying this | |
1068 | * system param can sync with this thread. | |
1069 | */ | |
1070 | down_read(&rdma_nets_rwsem); | |
1071 | xa_for_each (&rdma_nets, net_index, rnet) { | |
1072 | ret = add_one_compat_dev(dev, rnet); | |
1073 | if (ret) | |
1074 | break; | |
1075 | } | |
1076 | up_read(&rdma_nets_rwsem); | |
1077 | } | |
1078 | up_read(&devices_rwsem); | |
1079 | if (ret) | |
1080 | remove_all_compat_devs(); | |
1081 | return ret; | |
1082 | } | |
1083 | ||
1084 | int rdma_compatdev_set(u8 enable) | |
1085 | { | |
1086 | struct rdma_dev_net *rnet; | |
1087 | unsigned long index; | |
1088 | int ret = 0; | |
1089 | ||
1090 | down_write(&rdma_nets_rwsem); | |
1091 | if (ib_devices_shared_netns == enable) { | |
1092 | up_write(&rdma_nets_rwsem); | |
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | /* enable/disable of compat devices is not supported | |
1097 | * when more than default init_net exists. | |
1098 | */ | |
1099 | xa_for_each (&rdma_nets, index, rnet) { | |
1100 | ret++; | |
1101 | break; | |
1102 | } | |
1103 | if (!ret) | |
1104 | ib_devices_shared_netns = enable; | |
1105 | up_write(&rdma_nets_rwsem); | |
1106 | if (ret) | |
1107 | return -EBUSY; | |
1108 | ||
1109 | if (enable) | |
1110 | ret = add_all_compat_devs(); | |
1111 | else | |
1112 | remove_all_compat_devs(); | |
1113 | return ret; | |
1114 | } | |
1115 | ||
4e0f7b90 PP |
1116 | static void rdma_dev_exit_net(struct net *net) |
1117 | { | |
1d2fedd8 | 1118 | struct rdma_dev_net *rnet = rdma_net_to_dev_net(net); |
4e0f7b90 PP |
1119 | struct ib_device *dev; |
1120 | unsigned long index; | |
1121 | int ret; | |
1122 | ||
1123 | down_write(&rdma_nets_rwsem); | |
1124 | /* | |
1125 | * Prevent the ID from being re-used and hide the id from xa_for_each. | |
1126 | */ | |
1127 | ret = xa_err(xa_store(&rdma_nets, rnet->id, NULL, GFP_KERNEL)); | |
1128 | WARN_ON(ret); | |
1129 | up_write(&rdma_nets_rwsem); | |
1130 | ||
1131 | down_read(&devices_rwsem); | |
1132 | xa_for_each (&devices, index, dev) { | |
1133 | get_device(&dev->dev); | |
1134 | /* | |
1135 | * Release the devices_rwsem so that pontentially blocking | |
1136 | * device_del, doesn't hold the devices_rwsem for too long. | |
1137 | */ | |
1138 | up_read(&devices_rwsem); | |
1139 | ||
1140 | remove_one_compat_dev(dev, rnet->id); | |
1141 | ||
decbc7a6 PP |
1142 | /* |
1143 | * If the real device is in the NS then move it back to init. | |
1144 | */ | |
1145 | rdma_dev_change_netns(dev, net, &init_net); | |
1146 | ||
4e0f7b90 PP |
1147 | put_device(&dev->dev); |
1148 | down_read(&devices_rwsem); | |
1149 | } | |
1150 | up_read(&devices_rwsem); | |
1151 | ||
1d2fedd8 | 1152 | rdma_nl_net_exit(rnet); |
4e0f7b90 PP |
1153 | xa_erase(&rdma_nets, rnet->id); |
1154 | } | |
1155 | ||
1156 | static __net_init int rdma_dev_init_net(struct net *net) | |
1157 | { | |
1d2fedd8 | 1158 | struct rdma_dev_net *rnet = rdma_net_to_dev_net(net); |
4e0f7b90 PP |
1159 | unsigned long index; |
1160 | struct ib_device *dev; | |
1161 | int ret; | |
1162 | ||
1d2fedd8 PP |
1163 | write_pnet(&rnet->net, net); |
1164 | ||
1165 | ret = rdma_nl_net_init(rnet); | |
1166 | if (ret) | |
1167 | return ret; | |
1168 | ||
4e0f7b90 PP |
1169 | /* No need to create any compat devices in default init_net. */ |
1170 | if (net_eq(net, &init_net)) | |
1171 | return 0; | |
1172 | ||
4e0f7b90 | 1173 | ret = xa_alloc(&rdma_nets, &rnet->id, rnet, xa_limit_32b, GFP_KERNEL); |
1d2fedd8 PP |
1174 | if (ret) { |
1175 | rdma_nl_net_exit(rnet); | |
4e0f7b90 | 1176 | return ret; |
1d2fedd8 | 1177 | } |
4e0f7b90 PP |
1178 | |
1179 | down_read(&devices_rwsem); | |
1180 | xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) { | |
2b34c558 PP |
1181 | /* Hold nets_rwsem so that netlink command cannot change |
1182 | * system configuration for device sharing mode. | |
1183 | */ | |
1184 | down_read(&rdma_nets_rwsem); | |
4e0f7b90 | 1185 | ret = add_one_compat_dev(dev, rnet); |
2b34c558 | 1186 | up_read(&rdma_nets_rwsem); |
4e0f7b90 PP |
1187 | if (ret) |
1188 | break; | |
1189 | } | |
1190 | up_read(&devices_rwsem); | |
1191 | ||
1192 | if (ret) | |
1193 | rdma_dev_exit_net(net); | |
1194 | ||
1195 | return ret; | |
1196 | } | |
1197 | ||
0df91bb6 | 1198 | /* |
d0899892 JG |
1199 | * Assign the unique string device name and the unique device index. This is |
1200 | * undone by ib_dealloc_device. | |
ecc82c53 | 1201 | */ |
0df91bb6 | 1202 | static int assign_name(struct ib_device *device, const char *name) |
ecc82c53 | 1203 | { |
0df91bb6 JG |
1204 | static u32 last_id; |
1205 | int ret; | |
ecc82c53 | 1206 | |
921eab11 | 1207 | down_write(&devices_rwsem); |
0df91bb6 JG |
1208 | /* Assign a unique name to the device */ |
1209 | if (strchr(name, '%')) | |
1210 | ret = alloc_name(device, name); | |
1211 | else | |
1212 | ret = dev_set_name(&device->dev, name); | |
1213 | if (ret) | |
1214 | goto out; | |
1215 | ||
1216 | if (__ib_device_get_by_name(dev_name(&device->dev))) { | |
1217 | ret = -ENFILE; | |
1218 | goto out; | |
1219 | } | |
2c34bb6d | 1220 | strscpy(device->name, dev_name(&device->dev), IB_DEVICE_NAME_MAX); |
ecc82c53 | 1221 | |
ea295481 LT |
1222 | ret = xa_alloc_cyclic(&devices, &device->index, device, xa_limit_31b, |
1223 | &last_id, GFP_KERNEL); | |
1224 | if (ret > 0) | |
1225 | ret = 0; | |
921eab11 | 1226 | |
0df91bb6 | 1227 | out: |
921eab11 | 1228 | up_write(&devices_rwsem); |
0df91bb6 JG |
1229 | return ret; |
1230 | } | |
1231 | ||
921eab11 JG |
1232 | /* |
1233 | * setup_device() allocates memory and sets up data that requires calling the | |
1234 | * device ops, this is the only reason these actions are not done during | |
1235 | * ib_alloc_device. It is undone by ib_dealloc_device(). | |
1236 | */ | |
548cb4fb PP |
1237 | static int setup_device(struct ib_device *device) |
1238 | { | |
1239 | struct ib_udata uhw = {.outlen = 0, .inlen = 0}; | |
1240 | int ret; | |
1da177e4 | 1241 | |
deee3c7e | 1242 | ib_device_check_mandatory(device); |
1da177e4 | 1243 | |
8ceb1357 | 1244 | ret = setup_port_data(device); |
5eb620c8 | 1245 | if (ret) { |
8ceb1357 | 1246 | dev_warn(&device->dev, "Couldn't create per-port data\n"); |
548cb4fb PP |
1247 | return ret; |
1248 | } | |
1249 | ||
1250 | memset(&device->attrs, 0, sizeof(device->attrs)); | |
3023a1e9 | 1251 | ret = device->ops.query_device(device, &device->attrs, &uhw); |
548cb4fb PP |
1252 | if (ret) { |
1253 | dev_warn(&device->dev, | |
1254 | "Couldn't query the device attributes\n"); | |
d45f89d5 | 1255 | return ret; |
5eb620c8 YE |
1256 | } |
1257 | ||
d45f89d5 | 1258 | return 0; |
548cb4fb PP |
1259 | } |
1260 | ||
921eab11 JG |
1261 | static void disable_device(struct ib_device *device) |
1262 | { | |
9cd58817 | 1263 | u32 cid; |
921eab11 JG |
1264 | |
1265 | WARN_ON(!refcount_read(&device->refcount)); | |
1266 | ||
1267 | down_write(&devices_rwsem); | |
1268 | xa_clear_mark(&devices, device->index, DEVICE_REGISTERED); | |
1269 | up_write(&devices_rwsem); | |
1270 | ||
9cd58817 JG |
1271 | /* |
1272 | * Remove clients in LIFO order, see assign_client_id. This could be | |
1273 | * more efficient if xarray learns to reverse iterate. Since no new | |
1274 | * clients can be added to this ib_device past this point we only need | |
1275 | * the maximum possible client_id value here. | |
1276 | */ | |
921eab11 | 1277 | down_read(&clients_rwsem); |
9cd58817 | 1278 | cid = highest_client_id; |
921eab11 | 1279 | up_read(&clients_rwsem); |
9cd58817 JG |
1280 | while (cid) { |
1281 | cid--; | |
1282 | remove_client_context(device, cid); | |
1283 | } | |
921eab11 | 1284 | |
286e1d3f | 1285 | ib_cq_pool_cleanup(device); |
4aa16152 | 1286 | |
921eab11 JG |
1287 | /* Pairs with refcount_set in enable_device */ |
1288 | ib_device_put(device); | |
1289 | wait_for_completion(&device->unreg_completion); | |
c2261dd7 | 1290 | |
4e0f7b90 PP |
1291 | /* |
1292 | * compat devices must be removed after device refcount drops to zero. | |
1293 | * Otherwise init_net() may add more compatdevs after removing compat | |
1294 | * devices and before device is disabled. | |
1295 | */ | |
1296 | remove_compat_devs(device); | |
921eab11 JG |
1297 | } |
1298 | ||
1299 | /* | |
1300 | * An enabled device is visible to all clients and to all the public facing | |
d0899892 JG |
1301 | * APIs that return a device pointer. This always returns with a new get, even |
1302 | * if it fails. | |
921eab11 | 1303 | */ |
d0899892 | 1304 | static int enable_device_and_get(struct ib_device *device) |
921eab11 JG |
1305 | { |
1306 | struct ib_client *client; | |
1307 | unsigned long index; | |
d0899892 | 1308 | int ret = 0; |
921eab11 | 1309 | |
d0899892 JG |
1310 | /* |
1311 | * One ref belongs to the xa and the other belongs to this | |
1312 | * thread. This is needed to guard against parallel unregistration. | |
1313 | */ | |
1314 | refcount_set(&device->refcount, 2); | |
921eab11 JG |
1315 | down_write(&devices_rwsem); |
1316 | xa_set_mark(&devices, device->index, DEVICE_REGISTERED); | |
d0899892 JG |
1317 | |
1318 | /* | |
1319 | * By using downgrade_write() we ensure that no other thread can clear | |
1320 | * DEVICE_REGISTERED while we are completing the client setup. | |
1321 | */ | |
1322 | downgrade_write(&devices_rwsem); | |
921eab11 | 1323 | |
ca22354b JG |
1324 | if (device->ops.enable_driver) { |
1325 | ret = device->ops.enable_driver(device); | |
1326 | if (ret) | |
1327 | goto out; | |
1328 | } | |
1329 | ||
921eab11 JG |
1330 | down_read(&clients_rwsem); |
1331 | xa_for_each_marked (&clients, index, client, CLIENT_REGISTERED) { | |
1332 | ret = add_client_context(device, client); | |
d0899892 JG |
1333 | if (ret) |
1334 | break; | |
921eab11 JG |
1335 | } |
1336 | up_read(&clients_rwsem); | |
4e0f7b90 PP |
1337 | if (!ret) |
1338 | ret = add_compat_devs(device); | |
ca22354b | 1339 | out: |
d0899892 JG |
1340 | up_read(&devices_rwsem); |
1341 | return ret; | |
921eab11 JG |
1342 | } |
1343 | ||
0cb42c02 JG |
1344 | static void prevent_dealloc_device(struct ib_device *ib_dev) |
1345 | { | |
1346 | } | |
1347 | ||
548cb4fb PP |
1348 | /** |
1349 | * ib_register_device - Register an IB device with IB core | |
d6537c1a | 1350 | * @device: Device to register |
1351 | * @name: unique string device name. This may include a '%' which will | |
e0477b34 JG |
1352 | * cause a unique index to be added to the passed device name. |
1353 | * @dma_device: pointer to a DMA-capable device. If %NULL, then the IB | |
1354 | * device will be used. In this case the caller should fully | |
1355 | * setup the ibdev for DMA. This usually means using dma_virt_ops. | |
548cb4fb PP |
1356 | * |
1357 | * Low-level drivers use ib_register_device() to register their | |
1358 | * devices with the IB core. All registered clients will receive a | |
1359 | * callback for each device that is added. @device must be allocated | |
1360 | * with ib_alloc_device(). | |
d0899892 JG |
1361 | * |
1362 | * If the driver uses ops.dealloc_driver and calls any ib_unregister_device() | |
1363 | * asynchronously then the device pointer may become freed as soon as this | |
1364 | * function returns. | |
548cb4fb | 1365 | */ |
e0477b34 JG |
1366 | int ib_register_device(struct ib_device *device, const char *name, |
1367 | struct device *dma_device) | |
548cb4fb PP |
1368 | { |
1369 | int ret; | |
548cb4fb | 1370 | |
0df91bb6 JG |
1371 | ret = assign_name(device, name); |
1372 | if (ret) | |
921eab11 | 1373 | return ret; |
548cb4fb | 1374 | |
5a7a9e03 CH |
1375 | /* |
1376 | * If the caller does not provide a DMA capable device then the IB core | |
1377 | * will set up ib_sge and scatterlist structures that stash the kernel | |
1378 | * virtual address into the address field. | |
1379 | */ | |
1380 | WARN_ON(dma_device && !dma_device->dma_parms); | |
1381 | device->dma_device = dma_device; | |
1382 | ||
548cb4fb PP |
1383 | ret = setup_device(device); |
1384 | if (ret) | |
d0899892 | 1385 | return ret; |
03db3a2d | 1386 | |
d45f89d5 JG |
1387 | ret = ib_cache_setup_one(device); |
1388 | if (ret) { | |
1389 | dev_warn(&device->dev, | |
1390 | "Couldn't set up InfiniBand P_Key/GID cache\n"); | |
d0899892 | 1391 | return ret; |
d45f89d5 JG |
1392 | } |
1393 | ||
915e4af5 JG |
1394 | device->groups[0] = &ib_dev_attr_group; |
1395 | device->groups[1] = device->ops.device_group; | |
b7066b32 JG |
1396 | ret = ib_setup_device_attrs(device); |
1397 | if (ret) | |
1398 | goto cache_cleanup; | |
1399 | ||
7527a7b1 | 1400 | ib_device_register_rdmacg(device); |
3e153a93 | 1401 | |
413d3347 MZ |
1402 | rdma_counter_init(device); |
1403 | ||
e7a5b4aa LR |
1404 | /* |
1405 | * Ensure that ADD uevent is not fired because it | |
1406 | * is too early amd device is not initialized yet. | |
1407 | */ | |
1408 | dev_set_uevent_suppress(&device->dev, true); | |
5f8f5499 PP |
1409 | ret = device_add(&device->dev); |
1410 | if (ret) | |
1411 | goto cg_cleanup; | |
1412 | ||
b7066b32 | 1413 | ret = ib_setup_port_attrs(&device->coredev); |
1da177e4 | 1414 | if (ret) { |
43c7c851 JG |
1415 | dev_warn(&device->dev, |
1416 | "Couldn't register device with driver model\n"); | |
5f8f5499 | 1417 | goto dev_cleanup; |
1da177e4 LT |
1418 | } |
1419 | ||
d0899892 JG |
1420 | ret = enable_device_and_get(device); |
1421 | if (ret) { | |
1422 | void (*dealloc_fn)(struct ib_device *); | |
1423 | ||
1424 | /* | |
1425 | * If we hit this error flow then we don't want to | |
1426 | * automatically dealloc the device since the caller is | |
1427 | * expected to call ib_dealloc_device() after | |
1428 | * ib_register_device() fails. This is tricky due to the | |
1429 | * possibility for a parallel unregistration along with this | |
1430 | * error flow. Since we have a refcount here we know any | |
1431 | * parallel flow is stopped in disable_device and will see the | |
0cb42c02 | 1432 | * special dealloc_driver pointer, causing the responsibility to |
d0899892 JG |
1433 | * ib_dealloc_device() to revert back to this thread. |
1434 | */ | |
1435 | dealloc_fn = device->ops.dealloc_driver; | |
0cb42c02 | 1436 | device->ops.dealloc_driver = prevent_dealloc_device; |
d0899892 JG |
1437 | ib_device_put(device); |
1438 | __ib_unregister_device(device); | |
1439 | device->ops.dealloc_driver = dealloc_fn; | |
779e0bf4 | 1440 | dev_set_uevent_suppress(&device->dev, false); |
d0899892 JG |
1441 | return ret; |
1442 | } | |
779e0bf4 JM |
1443 | dev_set_uevent_suppress(&device->dev, false); |
1444 | /* Mark for userspace that device is ready */ | |
1445 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
d0899892 | 1446 | ib_device_put(device); |
1da177e4 | 1447 | |
4be3a4fa PP |
1448 | return 0; |
1449 | ||
5f8f5499 PP |
1450 | dev_cleanup: |
1451 | device_del(&device->dev); | |
2fb4f4ea | 1452 | cg_cleanup: |
e7a5b4aa | 1453 | dev_set_uevent_suppress(&device->dev, false); |
2fb4f4ea | 1454 | ib_device_unregister_rdmacg(device); |
b7066b32 | 1455 | cache_cleanup: |
d45f89d5 | 1456 | ib_cache_cleanup_one(device); |
1da177e4 LT |
1457 | return ret; |
1458 | } | |
1459 | EXPORT_SYMBOL(ib_register_device); | |
1460 | ||
d0899892 JG |
1461 | /* Callers must hold a get on the device. */ |
1462 | static void __ib_unregister_device(struct ib_device *ib_dev) | |
1463 | { | |
1464 | /* | |
1465 | * We have a registration lock so that all the calls to unregister are | |
1466 | * fully fenced, once any unregister returns the device is truely | |
1467 | * unregistered even if multiple callers are unregistering it at the | |
1468 | * same time. This also interacts with the registration flow and | |
1469 | * provides sane semantics if register and unregister are racing. | |
1470 | */ | |
1471 | mutex_lock(&ib_dev->unregistration_lock); | |
1472 | if (!refcount_read(&ib_dev->refcount)) | |
1473 | goto out; | |
1474 | ||
1475 | disable_device(ib_dev); | |
3042492b PP |
1476 | |
1477 | /* Expedite removing unregistered pointers from the hash table */ | |
1478 | free_netdevs(ib_dev); | |
1479 | ||
b7066b32 | 1480 | ib_free_port_attrs(&ib_dev->coredev); |
d0899892 JG |
1481 | device_del(&ib_dev->dev); |
1482 | ib_device_unregister_rdmacg(ib_dev); | |
1483 | ib_cache_cleanup_one(ib_dev); | |
1484 | ||
1485 | /* | |
1486 | * Drivers using the new flow may not call ib_dealloc_device except | |
1487 | * in error unwind prior to registration success. | |
1488 | */ | |
0cb42c02 JG |
1489 | if (ib_dev->ops.dealloc_driver && |
1490 | ib_dev->ops.dealloc_driver != prevent_dealloc_device) { | |
d0899892 JG |
1491 | WARN_ON(kref_read(&ib_dev->dev.kobj.kref) <= 1); |
1492 | ib_dealloc_device(ib_dev); | |
1493 | } | |
1494 | out: | |
1495 | mutex_unlock(&ib_dev->unregistration_lock); | |
1496 | } | |
1497 | ||
1da177e4 LT |
1498 | /** |
1499 | * ib_unregister_device - Unregister an IB device | |
d6537c1a | 1500 | * @ib_dev: The device to unregister |
1da177e4 LT |
1501 | * |
1502 | * Unregister an IB device. All clients will receive a remove callback. | |
d0899892 JG |
1503 | * |
1504 | * Callers should call this routine only once, and protect against races with | |
1505 | * registration. Typically it should only be called as part of a remove | |
1506 | * callback in an implementation of driver core's struct device_driver and | |
1507 | * related. | |
1508 | * | |
1509 | * If ops.dealloc_driver is used then ib_dev will be freed upon return from | |
1510 | * this function. | |
1da177e4 | 1511 | */ |
d0899892 | 1512 | void ib_unregister_device(struct ib_device *ib_dev) |
1da177e4 | 1513 | { |
d0899892 JG |
1514 | get_device(&ib_dev->dev); |
1515 | __ib_unregister_device(ib_dev); | |
1516 | put_device(&ib_dev->dev); | |
1da177e4 LT |
1517 | } |
1518 | EXPORT_SYMBOL(ib_unregister_device); | |
1519 | ||
d0899892 JG |
1520 | /** |
1521 | * ib_unregister_device_and_put - Unregister a device while holding a 'get' | |
d6537c1a | 1522 | * @ib_dev: The device to unregister |
d0899892 JG |
1523 | * |
1524 | * This is the same as ib_unregister_device(), except it includes an internal | |
1525 | * ib_device_put() that should match a 'get' obtained by the caller. | |
1526 | * | |
1527 | * It is safe to call this routine concurrently from multiple threads while | |
1528 | * holding the 'get'. When the function returns the device is fully | |
1529 | * unregistered. | |
1530 | * | |
1531 | * Drivers using this flow MUST use the driver_unregister callback to clean up | |
1532 | * their resources associated with the device and dealloc it. | |
1533 | */ | |
1534 | void ib_unregister_device_and_put(struct ib_device *ib_dev) | |
1535 | { | |
1536 | WARN_ON(!ib_dev->ops.dealloc_driver); | |
1537 | get_device(&ib_dev->dev); | |
1538 | ib_device_put(ib_dev); | |
1539 | __ib_unregister_device(ib_dev); | |
1540 | put_device(&ib_dev->dev); | |
1541 | } | |
1542 | EXPORT_SYMBOL(ib_unregister_device_and_put); | |
1543 | ||
1544 | /** | |
1545 | * ib_unregister_driver - Unregister all IB devices for a driver | |
1546 | * @driver_id: The driver to unregister | |
1547 | * | |
1548 | * This implements a fence for device unregistration. It only returns once all | |
1549 | * devices associated with the driver_id have fully completed their | |
1550 | * unregistration and returned from ib_unregister_device*(). | |
1551 | * | |
1552 | * If device's are not yet unregistered it goes ahead and starts unregistering | |
1553 | * them. | |
1554 | * | |
1555 | * This does not block creation of new devices with the given driver_id, that | |
1556 | * is the responsibility of the caller. | |
1557 | */ | |
1558 | void ib_unregister_driver(enum rdma_driver_id driver_id) | |
1559 | { | |
1560 | struct ib_device *ib_dev; | |
1561 | unsigned long index; | |
1562 | ||
1563 | down_read(&devices_rwsem); | |
1564 | xa_for_each (&devices, index, ib_dev) { | |
b9560a41 | 1565 | if (ib_dev->ops.driver_id != driver_id) |
d0899892 JG |
1566 | continue; |
1567 | ||
1568 | get_device(&ib_dev->dev); | |
1569 | up_read(&devices_rwsem); | |
1570 | ||
1571 | WARN_ON(!ib_dev->ops.dealloc_driver); | |
1572 | __ib_unregister_device(ib_dev); | |
1573 | ||
1574 | put_device(&ib_dev->dev); | |
1575 | down_read(&devices_rwsem); | |
1576 | } | |
1577 | up_read(&devices_rwsem); | |
1578 | } | |
1579 | EXPORT_SYMBOL(ib_unregister_driver); | |
1580 | ||
1581 | static void ib_unregister_work(struct work_struct *work) | |
1582 | { | |
1583 | struct ib_device *ib_dev = | |
1584 | container_of(work, struct ib_device, unregistration_work); | |
1585 | ||
1586 | __ib_unregister_device(ib_dev); | |
1587 | put_device(&ib_dev->dev); | |
1588 | } | |
1589 | ||
1590 | /** | |
1591 | * ib_unregister_device_queued - Unregister a device using a work queue | |
d6537c1a | 1592 | * @ib_dev: The device to unregister |
d0899892 JG |
1593 | * |
1594 | * This schedules an asynchronous unregistration using a WQ for the device. A | |
1595 | * driver should use this to avoid holding locks while doing unregistration, | |
1596 | * such as holding the RTNL lock. | |
1597 | * | |
1598 | * Drivers using this API must use ib_unregister_driver before module unload | |
1599 | * to ensure that all scheduled unregistrations have completed. | |
1600 | */ | |
1601 | void ib_unregister_device_queued(struct ib_device *ib_dev) | |
1602 | { | |
1603 | WARN_ON(!refcount_read(&ib_dev->refcount)); | |
1604 | WARN_ON(!ib_dev->ops.dealloc_driver); | |
1605 | get_device(&ib_dev->dev); | |
ff815a89 | 1606 | if (!queue_work(ib_unreg_wq, &ib_dev->unregistration_work)) |
d0899892 JG |
1607 | put_device(&ib_dev->dev); |
1608 | } | |
1609 | EXPORT_SYMBOL(ib_unregister_device_queued); | |
1610 | ||
decbc7a6 PP |
1611 | /* |
1612 | * The caller must pass in a device that has the kref held and the refcount | |
1613 | * released. If the device is in cur_net and still registered then it is moved | |
1614 | * into net. | |
1615 | */ | |
1616 | static int rdma_dev_change_netns(struct ib_device *device, struct net *cur_net, | |
1617 | struct net *net) | |
1618 | { | |
1619 | int ret2 = -EINVAL; | |
1620 | int ret; | |
1621 | ||
1622 | mutex_lock(&device->unregistration_lock); | |
1623 | ||
1624 | /* | |
2e5b8a01 PP |
1625 | * If a device not under ib_device_get() or if the unregistration_lock |
1626 | * is not held, the namespace can be changed, or it can be unregistered. | |
1627 | * Check again under the lock. | |
decbc7a6 PP |
1628 | */ |
1629 | if (refcount_read(&device->refcount) == 0 || | |
1630 | !net_eq(cur_net, read_pnet(&device->coredev.rdma_net))) { | |
1631 | ret = -ENODEV; | |
1632 | goto out; | |
1633 | } | |
1634 | ||
1635 | kobject_uevent(&device->dev.kobj, KOBJ_REMOVE); | |
1636 | disable_device(device); | |
1637 | ||
1638 | /* | |
1639 | * At this point no one can be using the device, so it is safe to | |
1640 | * change the namespace. | |
1641 | */ | |
1642 | write_pnet(&device->coredev.rdma_net, net); | |
1643 | ||
2e5b8a01 | 1644 | down_read(&devices_rwsem); |
decbc7a6 PP |
1645 | /* |
1646 | * Currently rdma devices are system wide unique. So the device name | |
1647 | * is guaranteed free in the new namespace. Publish the new namespace | |
1648 | * at the sysfs level. | |
1649 | */ | |
decbc7a6 PP |
1650 | ret = device_rename(&device->dev, dev_name(&device->dev)); |
1651 | up_read(&devices_rwsem); | |
1652 | if (ret) { | |
1653 | dev_warn(&device->dev, | |
1654 | "%s: Couldn't rename device after namespace change\n", | |
1655 | __func__); | |
1656 | /* Try and put things back and re-enable the device */ | |
1657 | write_pnet(&device->coredev.rdma_net, cur_net); | |
1658 | } | |
1659 | ||
1660 | ret2 = enable_device_and_get(device); | |
2e5b8a01 | 1661 | if (ret2) { |
decbc7a6 PP |
1662 | /* |
1663 | * This shouldn't really happen, but if it does, let the user | |
1664 | * retry at later point. So don't disable the device. | |
1665 | */ | |
1666 | dev_warn(&device->dev, | |
1667 | "%s: Couldn't re-enable device after namespace change\n", | |
1668 | __func__); | |
2e5b8a01 | 1669 | } |
decbc7a6 | 1670 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); |
2e5b8a01 | 1671 | |
decbc7a6 PP |
1672 | ib_device_put(device); |
1673 | out: | |
1674 | mutex_unlock(&device->unregistration_lock); | |
1675 | if (ret) | |
1676 | return ret; | |
1677 | return ret2; | |
1678 | } | |
1679 | ||
2e5b8a01 PP |
1680 | int ib_device_set_netns_put(struct sk_buff *skb, |
1681 | struct ib_device *dev, u32 ns_fd) | |
1682 | { | |
1683 | struct net *net; | |
1684 | int ret; | |
1685 | ||
1686 | net = get_net_ns_by_fd(ns_fd); | |
1687 | if (IS_ERR(net)) { | |
1688 | ret = PTR_ERR(net); | |
1689 | goto net_err; | |
1690 | } | |
1691 | ||
1692 | if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { | |
1693 | ret = -EPERM; | |
1694 | goto ns_err; | |
1695 | } | |
1696 | ||
1697 | /* | |
69d86a66 JG |
1698 | * All the ib_clients, including uverbs, are reset when the namespace is |
1699 | * changed and this cannot be blocked waiting for userspace to do | |
1700 | * something, so disassociation is mandatory. | |
2e5b8a01 | 1701 | */ |
69d86a66 | 1702 | if (!dev->ops.disassociate_ucontext || ib_devices_shared_netns) { |
2e5b8a01 PP |
1703 | ret = -EOPNOTSUPP; |
1704 | goto ns_err; | |
1705 | } | |
1706 | ||
1707 | get_device(&dev->dev); | |
1708 | ib_device_put(dev); | |
1709 | ret = rdma_dev_change_netns(dev, current->nsproxy->net_ns, net); | |
1710 | put_device(&dev->dev); | |
1711 | ||
1712 | put_net(net); | |
1713 | return ret; | |
1714 | ||
1715 | ns_err: | |
1716 | put_net(net); | |
1717 | net_err: | |
1718 | ib_device_put(dev); | |
1719 | return ret; | |
1720 | } | |
1721 | ||
4e0f7b90 PP |
1722 | static struct pernet_operations rdma_dev_net_ops = { |
1723 | .init = rdma_dev_init_net, | |
1724 | .exit = rdma_dev_exit_net, | |
1725 | .id = &rdma_dev_net_id, | |
1726 | .size = sizeof(struct rdma_dev_net), | |
1727 | }; | |
1728 | ||
e59178d8 JG |
1729 | static int assign_client_id(struct ib_client *client) |
1730 | { | |
1731 | int ret; | |
1732 | ||
921eab11 | 1733 | down_write(&clients_rwsem); |
e59178d8 JG |
1734 | /* |
1735 | * The add/remove callbacks must be called in FIFO/LIFO order. To | |
1736 | * achieve this we assign client_ids so they are sorted in | |
9cd58817 | 1737 | * registration order. |
e59178d8 | 1738 | */ |
9cd58817 | 1739 | client->client_id = highest_client_id; |
ea295481 | 1740 | ret = xa_insert(&clients, client->client_id, client, GFP_KERNEL); |
e59178d8 JG |
1741 | if (ret) |
1742 | goto out; | |
1743 | ||
9cd58817 | 1744 | highest_client_id++; |
921eab11 | 1745 | xa_set_mark(&clients, client->client_id, CLIENT_REGISTERED); |
921eab11 | 1746 | |
e59178d8 | 1747 | out: |
921eab11 | 1748 | up_write(&clients_rwsem); |
e59178d8 JG |
1749 | return ret; |
1750 | } | |
1751 | ||
9cd58817 JG |
1752 | static void remove_client_id(struct ib_client *client) |
1753 | { | |
1754 | down_write(&clients_rwsem); | |
1755 | xa_erase(&clients, client->client_id); | |
1756 | for (; highest_client_id; highest_client_id--) | |
1757 | if (xa_load(&clients, highest_client_id - 1)) | |
1758 | break; | |
1759 | up_write(&clients_rwsem); | |
1760 | } | |
1761 | ||
1da177e4 LT |
1762 | /** |
1763 | * ib_register_client - Register an IB client | |
1764 | * @client:Client to register | |
1765 | * | |
1766 | * Upper level users of the IB drivers can use ib_register_client() to | |
1767 | * register callbacks for IB device addition and removal. When an IB | |
1768 | * device is added, each registered client's add method will be called | |
1769 | * (in the order the clients were registered), and when a device is | |
1770 | * removed, each client's remove method will be called (in the reverse | |
1771 | * order that clients were registered). In addition, when | |
1772 | * ib_register_client() is called, the client will receive an add | |
1773 | * callback for all devices already registered. | |
1774 | */ | |
1775 | int ib_register_client(struct ib_client *client) | |
1776 | { | |
1777 | struct ib_device *device; | |
0df91bb6 | 1778 | unsigned long index; |
e59178d8 | 1779 | int ret; |
1da177e4 | 1780 | |
621e55ff JG |
1781 | refcount_set(&client->uses, 1); |
1782 | init_completion(&client->uses_zero); | |
e59178d8 | 1783 | ret = assign_client_id(client); |
921eab11 | 1784 | if (ret) |
e59178d8 | 1785 | return ret; |
1da177e4 | 1786 | |
921eab11 JG |
1787 | down_read(&devices_rwsem); |
1788 | xa_for_each_marked (&devices, index, device, DEVICE_REGISTERED) { | |
1789 | ret = add_client_context(device, client); | |
1790 | if (ret) { | |
1791 | up_read(&devices_rwsem); | |
1792 | ib_unregister_client(client); | |
1793 | return ret; | |
1794 | } | |
1795 | } | |
1796 | up_read(&devices_rwsem); | |
1da177e4 LT |
1797 | return 0; |
1798 | } | |
1799 | EXPORT_SYMBOL(ib_register_client); | |
1800 | ||
1801 | /** | |
1802 | * ib_unregister_client - Unregister an IB client | |
1803 | * @client:Client to unregister | |
1804 | * | |
1805 | * Upper level users use ib_unregister_client() to remove their client | |
1806 | * registration. When ib_unregister_client() is called, the client | |
1807 | * will receive a remove callback for each IB device still registered. | |
921eab11 JG |
1808 | * |
1809 | * This is a full fence, once it returns no client callbacks will be called, | |
1810 | * or are running in another thread. | |
1da177e4 LT |
1811 | */ |
1812 | void ib_unregister_client(struct ib_client *client) | |
1813 | { | |
1da177e4 | 1814 | struct ib_device *device; |
0df91bb6 | 1815 | unsigned long index; |
1da177e4 | 1816 | |
921eab11 | 1817 | down_write(&clients_rwsem); |
621e55ff | 1818 | ib_client_put(client); |
e59178d8 | 1819 | xa_clear_mark(&clients, client->client_id, CLIENT_REGISTERED); |
921eab11 | 1820 | up_write(&clients_rwsem); |
621e55ff JG |
1821 | |
1822 | /* We do not want to have locks while calling client->remove() */ | |
1823 | rcu_read_lock(); | |
1824 | xa_for_each (&devices, index, device) { | |
1825 | if (!ib_device_try_get(device)) | |
1826 | continue; | |
1827 | rcu_read_unlock(); | |
1828 | ||
921eab11 | 1829 | remove_client_context(device, client->client_id); |
1da177e4 | 1830 | |
621e55ff JG |
1831 | ib_device_put(device); |
1832 | rcu_read_lock(); | |
1833 | } | |
1834 | rcu_read_unlock(); | |
1835 | ||
921eab11 | 1836 | /* |
621e55ff JG |
1837 | * remove_client_context() is not a fence, it can return even though a |
1838 | * removal is ongoing. Wait until all removals are completed. | |
921eab11 | 1839 | */ |
621e55ff | 1840 | wait_for_completion(&client->uses_zero); |
9cd58817 | 1841 | remove_client_id(client); |
1da177e4 LT |
1842 | } |
1843 | EXPORT_SYMBOL(ib_unregister_client); | |
1844 | ||
0e2d00eb JG |
1845 | static int __ib_get_global_client_nl_info(const char *client_name, |
1846 | struct ib_client_nl_info *res) | |
1847 | { | |
1848 | struct ib_client *client; | |
1849 | unsigned long index; | |
1850 | int ret = -ENOENT; | |
1851 | ||
1852 | down_read(&clients_rwsem); | |
1853 | xa_for_each_marked (&clients, index, client, CLIENT_REGISTERED) { | |
1854 | if (strcmp(client->name, client_name) != 0) | |
1855 | continue; | |
1856 | if (!client->get_global_nl_info) { | |
1857 | ret = -EOPNOTSUPP; | |
1858 | break; | |
1859 | } | |
1860 | ret = client->get_global_nl_info(res); | |
1861 | if (WARN_ON(ret == -ENOENT)) | |
1862 | ret = -EINVAL; | |
1863 | if (!ret && res->cdev) | |
1864 | get_device(res->cdev); | |
1865 | break; | |
1866 | } | |
1867 | up_read(&clients_rwsem); | |
1868 | return ret; | |
1869 | } | |
1870 | ||
1871 | static int __ib_get_client_nl_info(struct ib_device *ibdev, | |
1872 | const char *client_name, | |
1873 | struct ib_client_nl_info *res) | |
1874 | { | |
1875 | unsigned long index; | |
1876 | void *client_data; | |
1877 | int ret = -ENOENT; | |
1878 | ||
1879 | down_read(&ibdev->client_data_rwsem); | |
1880 | xan_for_each_marked (&ibdev->client_data, index, client_data, | |
1881 | CLIENT_DATA_REGISTERED) { | |
1882 | struct ib_client *client = xa_load(&clients, index); | |
1883 | ||
1884 | if (!client || strcmp(client->name, client_name) != 0) | |
1885 | continue; | |
1886 | if (!client->get_nl_info) { | |
1887 | ret = -EOPNOTSUPP; | |
1888 | break; | |
1889 | } | |
1890 | ret = client->get_nl_info(ibdev, client_data, res); | |
1891 | if (WARN_ON(ret == -ENOENT)) | |
1892 | ret = -EINVAL; | |
1893 | ||
1894 | /* | |
1895 | * The cdev is guaranteed valid as long as we are inside the | |
1896 | * client_data_rwsem as remove_one can't be called. Keep it | |
1897 | * valid for the caller. | |
1898 | */ | |
1899 | if (!ret && res->cdev) | |
1900 | get_device(res->cdev); | |
1901 | break; | |
1902 | } | |
1903 | up_read(&ibdev->client_data_rwsem); | |
1904 | ||
1905 | return ret; | |
1906 | } | |
1907 | ||
1908 | /** | |
1909 | * ib_get_client_nl_info - Fetch the nl_info from a client | |
4c3b53e1 LJ |
1910 | * @ibdev: IB device |
1911 | * @client_name: Name of the client | |
1912 | * @res: Result of the query | |
0e2d00eb JG |
1913 | */ |
1914 | int ib_get_client_nl_info(struct ib_device *ibdev, const char *client_name, | |
1915 | struct ib_client_nl_info *res) | |
1916 | { | |
1917 | int ret; | |
1918 | ||
1919 | if (ibdev) | |
1920 | ret = __ib_get_client_nl_info(ibdev, client_name, res); | |
1921 | else | |
1922 | ret = __ib_get_global_client_nl_info(client_name, res); | |
1923 | #ifdef CONFIG_MODULES | |
1924 | if (ret == -ENOENT) { | |
1925 | request_module("rdma-client-%s", client_name); | |
1926 | if (ibdev) | |
1927 | ret = __ib_get_client_nl_info(ibdev, client_name, res); | |
1928 | else | |
1929 | ret = __ib_get_global_client_nl_info(client_name, res); | |
1930 | } | |
1931 | #endif | |
1932 | if (ret) { | |
1933 | if (ret == -ENOENT) | |
1934 | return -EOPNOTSUPP; | |
1935 | return ret; | |
1936 | } | |
1937 | ||
1938 | if (WARN_ON(!res->cdev)) | |
1939 | return -EINVAL; | |
1940 | return 0; | |
1941 | } | |
1942 | ||
1da177e4 | 1943 | /** |
9cd330d3 | 1944 | * ib_set_client_data - Set IB client context |
1da177e4 LT |
1945 | * @device:Device to set context for |
1946 | * @client:Client to set context for | |
1947 | * @data:Context to set | |
1948 | * | |
0df91bb6 JG |
1949 | * ib_set_client_data() sets client context data that can be retrieved with |
1950 | * ib_get_client_data(). This can only be called while the client is | |
1951 | * registered to the device, once the ib_client remove() callback returns this | |
1952 | * cannot be called. | |
1da177e4 LT |
1953 | */ |
1954 | void ib_set_client_data(struct ib_device *device, struct ib_client *client, | |
1955 | void *data) | |
1956 | { | |
0df91bb6 | 1957 | void *rc; |
1da177e4 | 1958 | |
0df91bb6 JG |
1959 | if (WARN_ON(IS_ERR(data))) |
1960 | data = NULL; | |
1da177e4 | 1961 | |
0df91bb6 JG |
1962 | rc = xa_store(&device->client_data, client->client_id, data, |
1963 | GFP_KERNEL); | |
1964 | WARN_ON(xa_is_err(rc)); | |
1da177e4 LT |
1965 | } |
1966 | EXPORT_SYMBOL(ib_set_client_data); | |
1967 | ||
1968 | /** | |
1969 | * ib_register_event_handler - Register an IB event handler | |
1970 | * @event_handler:Handler to register | |
1971 | * | |
1972 | * ib_register_event_handler() registers an event handler that will be | |
1973 | * called back when asynchronous IB events occur (as defined in | |
6b57cea9 PP |
1974 | * chapter 11 of the InfiniBand Architecture Specification). This |
1975 | * callback occurs in workqueue context. | |
1da177e4 | 1976 | */ |
dcc9881e | 1977 | void ib_register_event_handler(struct ib_event_handler *event_handler) |
1da177e4 | 1978 | { |
6b57cea9 | 1979 | down_write(&event_handler->device->event_handler_rwsem); |
1da177e4 LT |
1980 | list_add_tail(&event_handler->list, |
1981 | &event_handler->device->event_handler_list); | |
6b57cea9 | 1982 | up_write(&event_handler->device->event_handler_rwsem); |
1da177e4 LT |
1983 | } |
1984 | EXPORT_SYMBOL(ib_register_event_handler); | |
1985 | ||
1986 | /** | |
1987 | * ib_unregister_event_handler - Unregister an event handler | |
1988 | * @event_handler:Handler to unregister | |
1989 | * | |
1990 | * Unregister an event handler registered with | |
1991 | * ib_register_event_handler(). | |
1992 | */ | |
dcc9881e | 1993 | void ib_unregister_event_handler(struct ib_event_handler *event_handler) |
1da177e4 | 1994 | { |
6b57cea9 | 1995 | down_write(&event_handler->device->event_handler_rwsem); |
1da177e4 | 1996 | list_del(&event_handler->list); |
6b57cea9 | 1997 | up_write(&event_handler->device->event_handler_rwsem); |
1da177e4 LT |
1998 | } |
1999 | EXPORT_SYMBOL(ib_unregister_event_handler); | |
2000 | ||
6b57cea9 | 2001 | void ib_dispatch_event_clients(struct ib_event *event) |
1da177e4 | 2002 | { |
1da177e4 LT |
2003 | struct ib_event_handler *handler; |
2004 | ||
6b57cea9 | 2005 | down_read(&event->device->event_handler_rwsem); |
1da177e4 LT |
2006 | |
2007 | list_for_each_entry(handler, &event->device->event_handler_list, list) | |
2008 | handler->handler(handler, event); | |
2009 | ||
6b57cea9 | 2010 | up_read(&event->device->event_handler_rwsem); |
1da177e4 | 2011 | } |
1da177e4 | 2012 | |
4929116b | 2013 | static int iw_query_port(struct ib_device *device, |
1fb7f897 | 2014 | u32 port_num, |
4929116b | 2015 | struct ib_port_attr *port_attr) |
1da177e4 | 2016 | { |
4929116b KH |
2017 | struct in_device *inetdev; |
2018 | struct net_device *netdev; | |
fad61ad4 | 2019 | |
4929116b KH |
2020 | memset(port_attr, 0, sizeof(*port_attr)); |
2021 | ||
2022 | netdev = ib_device_get_netdev(device, port_num); | |
2023 | if (!netdev) | |
2024 | return -ENODEV; | |
2025 | ||
4929116b KH |
2026 | port_attr->max_mtu = IB_MTU_4096; |
2027 | port_attr->active_mtu = ib_mtu_int_to_enum(netdev->mtu); | |
2028 | ||
2029 | if (!netif_carrier_ok(netdev)) { | |
2030 | port_attr->state = IB_PORT_DOWN; | |
2031 | port_attr->phys_state = IB_PORT_PHYS_STATE_DISABLED; | |
2032 | } else { | |
390d3fdc MK |
2033 | rcu_read_lock(); |
2034 | inetdev = __in_dev_get_rcu(netdev); | |
4929116b KH |
2035 | |
2036 | if (inetdev && inetdev->ifa_list) { | |
2037 | port_attr->state = IB_PORT_ACTIVE; | |
2038 | port_attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP; | |
4929116b KH |
2039 | } else { |
2040 | port_attr->state = IB_PORT_INIT; | |
2041 | port_attr->phys_state = | |
2042 | IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING; | |
2043 | } | |
390d3fdc MK |
2044 | |
2045 | rcu_read_unlock(); | |
4929116b KH |
2046 | } |
2047 | ||
390d3fdc | 2048 | dev_put(netdev); |
1e123d96 | 2049 | return device->ops.query_port(device, port_num, port_attr); |
4929116b KH |
2050 | } |
2051 | ||
2052 | static int __ib_query_port(struct ib_device *device, | |
1fb7f897 | 2053 | u32 port_num, |
4929116b KH |
2054 | struct ib_port_attr *port_attr) |
2055 | { | |
4929116b | 2056 | int err; |
116c0074 | 2057 | |
fad61ad4 | 2058 | memset(port_attr, 0, sizeof(*port_attr)); |
4929116b | 2059 | |
3023a1e9 | 2060 | err = device->ops.query_port(device, port_num, port_attr); |
fad61ad4 EC |
2061 | if (err || port_attr->subnet_prefix) |
2062 | return err; | |
2063 | ||
4929116b KH |
2064 | if (rdma_port_get_link_layer(device, port_num) != |
2065 | IB_LINK_LAYER_INFINIBAND) | |
d7012467 EC |
2066 | return 0; |
2067 | ||
21bfee9c AK |
2068 | ib_get_cached_subnet_prefix(device, port_num, |
2069 | &port_attr->subnet_prefix); | |
fad61ad4 | 2070 | return 0; |
1da177e4 | 2071 | } |
4929116b KH |
2072 | |
2073 | /** | |
2074 | * ib_query_port - Query IB port attributes | |
2075 | * @device:Device to query | |
2076 | * @port_num:Port number to query | |
2077 | * @port_attr:Port attributes | |
2078 | * | |
2079 | * ib_query_port() returns the attributes of a port through the | |
2080 | * @port_attr pointer. | |
2081 | */ | |
2082 | int ib_query_port(struct ib_device *device, | |
1fb7f897 | 2083 | u32 port_num, |
4929116b KH |
2084 | struct ib_port_attr *port_attr) |
2085 | { | |
2086 | if (!rdma_is_port_valid(device, port_num)) | |
2087 | return -EINVAL; | |
2088 | ||
2089 | if (rdma_protocol_iwarp(device, port_num)) | |
2090 | return iw_query_port(device, port_num, port_attr); | |
2091 | else | |
2092 | return __ib_query_port(device, port_num, port_attr); | |
2093 | } | |
1da177e4 LT |
2094 | EXPORT_SYMBOL(ib_query_port); |
2095 | ||
324e227e JG |
2096 | static void add_ndev_hash(struct ib_port_data *pdata) |
2097 | { | |
2098 | unsigned long flags; | |
2099 | ||
2100 | might_sleep(); | |
2101 | ||
2102 | spin_lock_irqsave(&ndev_hash_lock, flags); | |
2103 | if (hash_hashed(&pdata->ndev_hash_link)) { | |
2104 | hash_del_rcu(&pdata->ndev_hash_link); | |
2105 | spin_unlock_irqrestore(&ndev_hash_lock, flags); | |
2106 | /* | |
2107 | * We cannot do hash_add_rcu after a hash_del_rcu until the | |
2108 | * grace period | |
2109 | */ | |
2110 | synchronize_rcu(); | |
2111 | spin_lock_irqsave(&ndev_hash_lock, flags); | |
2112 | } | |
2113 | if (pdata->netdev) | |
2114 | hash_add_rcu(ndev_hash, &pdata->ndev_hash_link, | |
2115 | (uintptr_t)pdata->netdev); | |
2116 | spin_unlock_irqrestore(&ndev_hash_lock, flags); | |
2117 | } | |
2118 | ||
c2261dd7 JG |
2119 | /** |
2120 | * ib_device_set_netdev - Associate the ib_dev with an underlying net_device | |
2121 | * @ib_dev: Device to modify | |
2122 | * @ndev: net_device to affiliate, may be NULL | |
2123 | * @port: IB port the net_device is connected to | |
2124 | * | |
2125 | * Drivers should use this to link the ib_device to a netdev so the netdev | |
2126 | * shows up in interfaces like ib_enum_roce_netdev. Only one netdev may be | |
2127 | * affiliated with any port. | |
2128 | * | |
2129 | * The caller must ensure that the given ndev is not unregistered or | |
2130 | * unregistering, and that either the ib_device is unregistered or | |
2131 | * ib_device_set_netdev() is called with NULL when the ndev sends a | |
2132 | * NETDEV_UNREGISTER event. | |
2133 | */ | |
2134 | int ib_device_set_netdev(struct ib_device *ib_dev, struct net_device *ndev, | |
1fb7f897 | 2135 | u32 port) |
c2261dd7 JG |
2136 | { |
2137 | struct net_device *old_ndev; | |
2138 | struct ib_port_data *pdata; | |
2139 | unsigned long flags; | |
2140 | int ret; | |
2141 | ||
2142 | /* | |
2143 | * Drivers wish to call this before ib_register_driver, so we have to | |
2144 | * setup the port data early. | |
2145 | */ | |
2146 | ret = alloc_port_data(ib_dev); | |
2147 | if (ret) | |
2148 | return ret; | |
2149 | ||
2150 | if (!rdma_is_port_valid(ib_dev, port)) | |
2151 | return -EINVAL; | |
2152 | ||
2153 | pdata = &ib_dev->port_data[port]; | |
2154 | spin_lock_irqsave(&pdata->netdev_lock, flags); | |
324e227e JG |
2155 | old_ndev = rcu_dereference_protected( |
2156 | pdata->netdev, lockdep_is_held(&pdata->netdev_lock)); | |
2157 | if (old_ndev == ndev) { | |
c2261dd7 JG |
2158 | spin_unlock_irqrestore(&pdata->netdev_lock, flags); |
2159 | return 0; | |
2160 | } | |
c2261dd7 | 2161 | |
09f530f0 JG |
2162 | if (old_ndev) |
2163 | netdev_tracker_free(ndev, &pdata->netdev_tracker); | |
c2261dd7 | 2164 | if (ndev) |
09f530f0 | 2165 | netdev_hold(ndev, &pdata->netdev_tracker, GFP_ATOMIC); |
324e227e | 2166 | rcu_assign_pointer(pdata->netdev, ndev); |
c2261dd7 JG |
2167 | spin_unlock_irqrestore(&pdata->netdev_lock, flags); |
2168 | ||
324e227e | 2169 | add_ndev_hash(pdata); |
c2261dd7 | 2170 | if (old_ndev) |
09f530f0 | 2171 | __dev_put(old_ndev); |
c2261dd7 JG |
2172 | |
2173 | return 0; | |
2174 | } | |
2175 | EXPORT_SYMBOL(ib_device_set_netdev); | |
2176 | ||
2177 | static void free_netdevs(struct ib_device *ib_dev) | |
2178 | { | |
2179 | unsigned long flags; | |
1fb7f897 | 2180 | u32 port; |
c2261dd7 | 2181 | |
46bdf370 KH |
2182 | if (!ib_dev->port_data) |
2183 | return; | |
2184 | ||
c2261dd7 JG |
2185 | rdma_for_each_port (ib_dev, port) { |
2186 | struct ib_port_data *pdata = &ib_dev->port_data[port]; | |
324e227e | 2187 | struct net_device *ndev; |
c2261dd7 JG |
2188 | |
2189 | spin_lock_irqsave(&pdata->netdev_lock, flags); | |
324e227e JG |
2190 | ndev = rcu_dereference_protected( |
2191 | pdata->netdev, lockdep_is_held(&pdata->netdev_lock)); | |
2192 | if (ndev) { | |
2193 | spin_lock(&ndev_hash_lock); | |
2194 | hash_del_rcu(&pdata->ndev_hash_link); | |
2195 | spin_unlock(&ndev_hash_lock); | |
2196 | ||
2197 | /* | |
2198 | * If this is the last dev_put there is still a | |
2199 | * synchronize_rcu before the netdev is kfreed, so we | |
2200 | * can continue to rely on unlocked pointer | |
2201 | * comparisons after the put | |
2202 | */ | |
2203 | rcu_assign_pointer(pdata->netdev, NULL); | |
e42f9c2e | 2204 | netdev_put(ndev, &pdata->netdev_tracker); |
c2261dd7 JG |
2205 | } |
2206 | spin_unlock_irqrestore(&pdata->netdev_lock, flags); | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | struct net_device *ib_device_get_netdev(struct ib_device *ib_dev, | |
1fb7f897 | 2211 | u32 port) |
c2261dd7 JG |
2212 | { |
2213 | struct ib_port_data *pdata; | |
2214 | struct net_device *res; | |
2215 | ||
2216 | if (!rdma_is_port_valid(ib_dev, port)) | |
2217 | return NULL; | |
2218 | ||
2219 | pdata = &ib_dev->port_data[port]; | |
2220 | ||
2221 | /* | |
2222 | * New drivers should use ib_device_set_netdev() not the legacy | |
2223 | * get_netdev(). | |
2224 | */ | |
2225 | if (ib_dev->ops.get_netdev) | |
2226 | res = ib_dev->ops.get_netdev(ib_dev, port); | |
2227 | else { | |
2228 | spin_lock(&pdata->netdev_lock); | |
324e227e JG |
2229 | res = rcu_dereference_protected( |
2230 | pdata->netdev, lockdep_is_held(&pdata->netdev_lock)); | |
c2261dd7 JG |
2231 | if (res) |
2232 | dev_hold(res); | |
2233 | spin_unlock(&pdata->netdev_lock); | |
2234 | } | |
2235 | ||
2236 | /* | |
2237 | * If we are starting to unregister expedite things by preventing | |
2238 | * propagation of an unregistering netdev. | |
2239 | */ | |
2240 | if (res && res->reg_state != NETREG_REGISTERED) { | |
2241 | dev_put(res); | |
2242 | return NULL; | |
2243 | } | |
2244 | ||
2245 | return res; | |
2246 | } | |
2247 | ||
324e227e JG |
2248 | /** |
2249 | * ib_device_get_by_netdev - Find an IB device associated with a netdev | |
2250 | * @ndev: netdev to locate | |
2251 | * @driver_id: The driver ID that must match (RDMA_DRIVER_UNKNOWN matches all) | |
2252 | * | |
2253 | * Find and hold an ib_device that is associated with a netdev via | |
2254 | * ib_device_set_netdev(). The caller must call ib_device_put() on the | |
2255 | * returned pointer. | |
2256 | */ | |
2257 | struct ib_device *ib_device_get_by_netdev(struct net_device *ndev, | |
2258 | enum rdma_driver_id driver_id) | |
2259 | { | |
2260 | struct ib_device *res = NULL; | |
2261 | struct ib_port_data *cur; | |
2262 | ||
2263 | rcu_read_lock(); | |
2264 | hash_for_each_possible_rcu (ndev_hash, cur, ndev_hash_link, | |
2265 | (uintptr_t)ndev) { | |
2266 | if (rcu_access_pointer(cur->netdev) == ndev && | |
2267 | (driver_id == RDMA_DRIVER_UNKNOWN || | |
b9560a41 | 2268 | cur->ib_dev->ops.driver_id == driver_id) && |
324e227e JG |
2269 | ib_device_try_get(cur->ib_dev)) { |
2270 | res = cur->ib_dev; | |
2271 | break; | |
2272 | } | |
2273 | } | |
2274 | rcu_read_unlock(); | |
2275 | ||
2276 | return res; | |
2277 | } | |
2278 | EXPORT_SYMBOL(ib_device_get_by_netdev); | |
2279 | ||
03db3a2d MB |
2280 | /** |
2281 | * ib_enum_roce_netdev - enumerate all RoCE ports | |
2282 | * @ib_dev : IB device we want to query | |
2283 | * @filter: Should we call the callback? | |
2284 | * @filter_cookie: Cookie passed to filter | |
2285 | * @cb: Callback to call for each found RoCE ports | |
2286 | * @cookie: Cookie passed back to the callback | |
2287 | * | |
2288 | * Enumerates all of the physical RoCE ports of ib_dev | |
2289 | * which are related to netdevice and calls callback() on each | |
2290 | * device for which filter() function returns non zero. | |
2291 | */ | |
2292 | void ib_enum_roce_netdev(struct ib_device *ib_dev, | |
2293 | roce_netdev_filter filter, | |
2294 | void *filter_cookie, | |
2295 | roce_netdev_callback cb, | |
2296 | void *cookie) | |
2297 | { | |
1fb7f897 | 2298 | u32 port; |
03db3a2d | 2299 | |
ea1075ed | 2300 | rdma_for_each_port (ib_dev, port) |
03db3a2d | 2301 | if (rdma_protocol_roce(ib_dev, port)) { |
c2261dd7 JG |
2302 | struct net_device *idev = |
2303 | ib_device_get_netdev(ib_dev, port); | |
03db3a2d MB |
2304 | |
2305 | if (filter(ib_dev, port, idev, filter_cookie)) | |
2306 | cb(ib_dev, port, idev, cookie); | |
2307 | ||
2308 | if (idev) | |
2309 | dev_put(idev); | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | /** | |
2314 | * ib_enum_all_roce_netdevs - enumerate all RoCE devices | |
2315 | * @filter: Should we call the callback? | |
2316 | * @filter_cookie: Cookie passed to filter | |
2317 | * @cb: Callback to call for each found RoCE ports | |
2318 | * @cookie: Cookie passed back to the callback | |
2319 | * | |
2320 | * Enumerates all RoCE devices' physical ports which are related | |
2321 | * to netdevices and calls callback() on each device for which | |
2322 | * filter() function returns non zero. | |
2323 | */ | |
2324 | void ib_enum_all_roce_netdevs(roce_netdev_filter filter, | |
2325 | void *filter_cookie, | |
2326 | roce_netdev_callback cb, | |
2327 | void *cookie) | |
2328 | { | |
2329 | struct ib_device *dev; | |
0df91bb6 | 2330 | unsigned long index; |
03db3a2d | 2331 | |
921eab11 | 2332 | down_read(&devices_rwsem); |
0df91bb6 | 2333 | xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) |
03db3a2d | 2334 | ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie); |
921eab11 | 2335 | up_read(&devices_rwsem); |
8030c835 LR |
2336 | } |
2337 | ||
4c3b53e1 | 2338 | /* |
8030c835 LR |
2339 | * ib_enum_all_devs - enumerate all ib_devices |
2340 | * @cb: Callback to call for each found ib_device | |
2341 | * | |
2342 | * Enumerates all ib_devices and calls callback() on each device. | |
2343 | */ | |
2344 | int ib_enum_all_devs(nldev_callback nldev_cb, struct sk_buff *skb, | |
2345 | struct netlink_callback *cb) | |
2346 | { | |
0df91bb6 | 2347 | unsigned long index; |
8030c835 LR |
2348 | struct ib_device *dev; |
2349 | unsigned int idx = 0; | |
2350 | int ret = 0; | |
2351 | ||
921eab11 | 2352 | down_read(&devices_rwsem); |
0df91bb6 | 2353 | xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) { |
37eeab55 PP |
2354 | if (!rdma_dev_access_netns(dev, sock_net(skb->sk))) |
2355 | continue; | |
2356 | ||
8030c835 LR |
2357 | ret = nldev_cb(dev, skb, cb, idx); |
2358 | if (ret) | |
2359 | break; | |
2360 | idx++; | |
2361 | } | |
921eab11 | 2362 | up_read(&devices_rwsem); |
8030c835 | 2363 | return ret; |
03db3a2d MB |
2364 | } |
2365 | ||
1da177e4 LT |
2366 | /** |
2367 | * ib_query_pkey - Get P_Key table entry | |
2368 | * @device:Device to query | |
2369 | * @port_num:Port number to query | |
2370 | * @index:P_Key table index to query | |
2371 | * @pkey:Returned P_Key | |
2372 | * | |
2373 | * ib_query_pkey() fetches the specified P_Key table entry. | |
2374 | */ | |
2375 | int ib_query_pkey(struct ib_device *device, | |
1fb7f897 | 2376 | u32 port_num, u16 index, u16 *pkey) |
1da177e4 | 2377 | { |
9af3f5cf YS |
2378 | if (!rdma_is_port_valid(device, port_num)) |
2379 | return -EINVAL; | |
2380 | ||
ab75a6cb KH |
2381 | if (!device->ops.query_pkey) |
2382 | return -EOPNOTSUPP; | |
2383 | ||
3023a1e9 | 2384 | return device->ops.query_pkey(device, port_num, index, pkey); |
1da177e4 LT |
2385 | } |
2386 | EXPORT_SYMBOL(ib_query_pkey); | |
2387 | ||
2388 | /** | |
2389 | * ib_modify_device - Change IB device attributes | |
2390 | * @device:Device to modify | |
2391 | * @device_modify_mask:Mask of attributes to change | |
2392 | * @device_modify:New attribute values | |
2393 | * | |
2394 | * ib_modify_device() changes a device's attributes as specified by | |
2395 | * the @device_modify_mask and @device_modify structure. | |
2396 | */ | |
2397 | int ib_modify_device(struct ib_device *device, | |
2398 | int device_modify_mask, | |
2399 | struct ib_device_modify *device_modify) | |
2400 | { | |
3023a1e9 | 2401 | if (!device->ops.modify_device) |
d0f3ef36 | 2402 | return -EOPNOTSUPP; |
10e1b54b | 2403 | |
3023a1e9 KH |
2404 | return device->ops.modify_device(device, device_modify_mask, |
2405 | device_modify); | |
1da177e4 LT |
2406 | } |
2407 | EXPORT_SYMBOL(ib_modify_device); | |
2408 | ||
2409 | /** | |
2410 | * ib_modify_port - Modifies the attributes for the specified port. | |
2411 | * @device: The device to modify. | |
2412 | * @port_num: The number of the port to modify. | |
2413 | * @port_modify_mask: Mask used to specify which attributes of the port | |
2414 | * to change. | |
2415 | * @port_modify: New attribute values for the port. | |
2416 | * | |
2417 | * ib_modify_port() changes a port's attributes as specified by the | |
2418 | * @port_modify_mask and @port_modify structure. | |
2419 | */ | |
2420 | int ib_modify_port(struct ib_device *device, | |
1fb7f897 | 2421 | u32 port_num, int port_modify_mask, |
1da177e4 LT |
2422 | struct ib_port_modify *port_modify) |
2423 | { | |
61e0962d | 2424 | int rc; |
10e1b54b | 2425 | |
24dc831b | 2426 | if (!rdma_is_port_valid(device, port_num)) |
116c0074 RD |
2427 | return -EINVAL; |
2428 | ||
3023a1e9 KH |
2429 | if (device->ops.modify_port) |
2430 | rc = device->ops.modify_port(device, port_num, | |
2431 | port_modify_mask, | |
2432 | port_modify); | |
55bfe905 KH |
2433 | else if (rdma_protocol_roce(device, port_num) && |
2434 | ((port_modify->set_port_cap_mask & ~IB_PORT_CM_SUP) == 0 || | |
2435 | (port_modify->clr_port_cap_mask & ~IB_PORT_CM_SUP) == 0)) | |
2436 | rc = 0; | |
61e0962d | 2437 | else |
55bfe905 | 2438 | rc = -EOPNOTSUPP; |
61e0962d | 2439 | return rc; |
1da177e4 LT |
2440 | } |
2441 | EXPORT_SYMBOL(ib_modify_port); | |
2442 | ||
5eb620c8 YE |
2443 | /** |
2444 | * ib_find_gid - Returns the port number and GID table index where | |
dbb12562 | 2445 | * a specified GID value occurs. Its searches only for IB link layer. |
5eb620c8 YE |
2446 | * @device: The device to query. |
2447 | * @gid: The GID value to search for. | |
2448 | * @port_num: The port number of the device where the GID value was found. | |
2449 | * @index: The index into the GID table where the GID was found. This | |
2450 | * parameter may be NULL. | |
2451 | */ | |
2452 | int ib_find_gid(struct ib_device *device, union ib_gid *gid, | |
1fb7f897 | 2453 | u32 *port_num, u16 *index) |
5eb620c8 YE |
2454 | { |
2455 | union ib_gid tmp_gid; | |
1fb7f897 | 2456 | u32 port; |
ea1075ed | 2457 | int ret, i; |
5eb620c8 | 2458 | |
ea1075ed | 2459 | rdma_for_each_port (device, port) { |
22d24f75 | 2460 | if (!rdma_protocol_ib(device, port)) |
b39ffa1d MB |
2461 | continue; |
2462 | ||
8ceb1357 JG |
2463 | for (i = 0; i < device->port_data[port].immutable.gid_tbl_len; |
2464 | ++i) { | |
1dfce294 | 2465 | ret = rdma_query_gid(device, port, i, &tmp_gid); |
5eb620c8 | 2466 | if (ret) |
483d8051 AH |
2467 | continue; |
2468 | ||
5eb620c8 YE |
2469 | if (!memcmp(&tmp_gid, gid, sizeof *gid)) { |
2470 | *port_num = port; | |
2471 | if (index) | |
2472 | *index = i; | |
2473 | return 0; | |
2474 | } | |
2475 | } | |
2476 | } | |
2477 | ||
2478 | return -ENOENT; | |
2479 | } | |
2480 | EXPORT_SYMBOL(ib_find_gid); | |
2481 | ||
2482 | /** | |
2483 | * ib_find_pkey - Returns the PKey table index where a specified | |
2484 | * PKey value occurs. | |
2485 | * @device: The device to query. | |
2486 | * @port_num: The port number of the device to search for the PKey. | |
2487 | * @pkey: The PKey value to search for. | |
2488 | * @index: The index into the PKey table where the PKey was found. | |
2489 | */ | |
2490 | int ib_find_pkey(struct ib_device *device, | |
1fb7f897 | 2491 | u32 port_num, u16 pkey, u16 *index) |
5eb620c8 YE |
2492 | { |
2493 | int ret, i; | |
2494 | u16 tmp_pkey; | |
ff7166c4 | 2495 | int partial_ix = -1; |
5eb620c8 | 2496 | |
8ceb1357 JG |
2497 | for (i = 0; i < device->port_data[port_num].immutable.pkey_tbl_len; |
2498 | ++i) { | |
5eb620c8 YE |
2499 | ret = ib_query_pkey(device, port_num, i, &tmp_pkey); |
2500 | if (ret) | |
2501 | return ret; | |
36026ecc | 2502 | if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { |
ff7166c4 JM |
2503 | /* if there is full-member pkey take it.*/ |
2504 | if (tmp_pkey & 0x8000) { | |
2505 | *index = i; | |
2506 | return 0; | |
2507 | } | |
2508 | if (partial_ix < 0) | |
2509 | partial_ix = i; | |
5eb620c8 YE |
2510 | } |
2511 | } | |
2512 | ||
ff7166c4 JM |
2513 | /*no full-member, if exists take the limited*/ |
2514 | if (partial_ix >= 0) { | |
2515 | *index = partial_ix; | |
2516 | return 0; | |
2517 | } | |
5eb620c8 YE |
2518 | return -ENOENT; |
2519 | } | |
2520 | EXPORT_SYMBOL(ib_find_pkey); | |
2521 | ||
9268f72d YK |
2522 | /** |
2523 | * ib_get_net_dev_by_params() - Return the appropriate net_dev | |
2524 | * for a received CM request | |
2525 | * @dev: An RDMA device on which the request has been received. | |
2526 | * @port: Port number on the RDMA device. | |
2527 | * @pkey: The Pkey the request came on. | |
2528 | * @gid: A GID that the net_dev uses to communicate. | |
2529 | * @addr: Contains the IP address that the request specified as its | |
2530 | * destination. | |
921eab11 | 2531 | * |
9268f72d YK |
2532 | */ |
2533 | struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, | |
1fb7f897 | 2534 | u32 port, |
9268f72d YK |
2535 | u16 pkey, |
2536 | const union ib_gid *gid, | |
2537 | const struct sockaddr *addr) | |
2538 | { | |
2539 | struct net_device *net_dev = NULL; | |
0df91bb6 JG |
2540 | unsigned long index; |
2541 | void *client_data; | |
9268f72d YK |
2542 | |
2543 | if (!rdma_protocol_ib(dev, port)) | |
2544 | return NULL; | |
2545 | ||
921eab11 JG |
2546 | /* |
2547 | * Holding the read side guarantees that the client will not become | |
2548 | * unregistered while we are calling get_net_dev_by_params() | |
2549 | */ | |
2550 | down_read(&dev->client_data_rwsem); | |
0df91bb6 JG |
2551 | xan_for_each_marked (&dev->client_data, index, client_data, |
2552 | CLIENT_DATA_REGISTERED) { | |
2553 | struct ib_client *client = xa_load(&clients, index); | |
9268f72d | 2554 | |
0df91bb6 | 2555 | if (!client || !client->get_net_dev_by_params) |
9268f72d YK |
2556 | continue; |
2557 | ||
0df91bb6 JG |
2558 | net_dev = client->get_net_dev_by_params(dev, port, pkey, gid, |
2559 | addr, client_data); | |
2560 | if (net_dev) | |
2561 | break; | |
9268f72d | 2562 | } |
921eab11 | 2563 | up_read(&dev->client_data_rwsem); |
9268f72d YK |
2564 | |
2565 | return net_dev; | |
2566 | } | |
2567 | EXPORT_SYMBOL(ib_get_net_dev_by_params); | |
2568 | ||
521ed0d9 KH |
2569 | void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops) |
2570 | { | |
3023a1e9 | 2571 | struct ib_device_ops *dev_ops = &dev->ops; |
521ed0d9 KH |
2572 | #define SET_DEVICE_OP(ptr, name) \ |
2573 | do { \ | |
2574 | if (ops->name) \ | |
2575 | if (!((ptr)->name)) \ | |
2576 | (ptr)->name = ops->name; \ | |
2577 | } while (0) | |
2578 | ||
30471d4b LR |
2579 | #define SET_OBJ_SIZE(ptr, name) SET_DEVICE_OP(ptr, size_##name) |
2580 | ||
b9560a41 JG |
2581 | if (ops->driver_id != RDMA_DRIVER_UNKNOWN) { |
2582 | WARN_ON(dev_ops->driver_id != RDMA_DRIVER_UNKNOWN && | |
2583 | dev_ops->driver_id != ops->driver_id); | |
2584 | dev_ops->driver_id = ops->driver_id; | |
2585 | } | |
7a154142 JG |
2586 | if (ops->owner) { |
2587 | WARN_ON(dev_ops->owner && dev_ops->owner != ops->owner); | |
2588 | dev_ops->owner = ops->owner; | |
2589 | } | |
72c6ec18 JG |
2590 | if (ops->uverbs_abi_ver) |
2591 | dev_ops->uverbs_abi_ver = ops->uverbs_abi_ver; | |
b9560a41 | 2592 | |
8f71bb00 JG |
2593 | dev_ops->uverbs_no_driver_id_binding |= |
2594 | ops->uverbs_no_driver_id_binding; | |
2595 | ||
3023a1e9 | 2596 | SET_DEVICE_OP(dev_ops, add_gid); |
2f1927b0 | 2597 | SET_DEVICE_OP(dev_ops, advise_mr); |
3023a1e9 | 2598 | SET_DEVICE_OP(dev_ops, alloc_dm); |
4b5f4d3f JG |
2599 | SET_DEVICE_OP(dev_ops, alloc_hw_device_stats); |
2600 | SET_DEVICE_OP(dev_ops, alloc_hw_port_stats); | |
3023a1e9 | 2601 | SET_DEVICE_OP(dev_ops, alloc_mr); |
26bc7eae | 2602 | SET_DEVICE_OP(dev_ops, alloc_mr_integrity); |
3023a1e9 KH |
2603 | SET_DEVICE_OP(dev_ops, alloc_mw); |
2604 | SET_DEVICE_OP(dev_ops, alloc_pd); | |
2605 | SET_DEVICE_OP(dev_ops, alloc_rdma_netdev); | |
2606 | SET_DEVICE_OP(dev_ops, alloc_ucontext); | |
2607 | SET_DEVICE_OP(dev_ops, alloc_xrcd); | |
2608 | SET_DEVICE_OP(dev_ops, attach_mcast); | |
2609 | SET_DEVICE_OP(dev_ops, check_mr_status); | |
c4ffee7c | 2610 | SET_DEVICE_OP(dev_ops, counter_alloc_stats); |
99fa331d MZ |
2611 | SET_DEVICE_OP(dev_ops, counter_bind_qp); |
2612 | SET_DEVICE_OP(dev_ops, counter_dealloc); | |
2613 | SET_DEVICE_OP(dev_ops, counter_unbind_qp); | |
c4ffee7c | 2614 | SET_DEVICE_OP(dev_ops, counter_update_stats); |
3023a1e9 KH |
2615 | SET_DEVICE_OP(dev_ops, create_ah); |
2616 | SET_DEVICE_OP(dev_ops, create_counters); | |
2617 | SET_DEVICE_OP(dev_ops, create_cq); | |
2618 | SET_DEVICE_OP(dev_ops, create_flow); | |
3023a1e9 KH |
2619 | SET_DEVICE_OP(dev_ops, create_qp); |
2620 | SET_DEVICE_OP(dev_ops, create_rwq_ind_table); | |
2621 | SET_DEVICE_OP(dev_ops, create_srq); | |
676a80ad | 2622 | SET_DEVICE_OP(dev_ops, create_user_ah); |
3023a1e9 KH |
2623 | SET_DEVICE_OP(dev_ops, create_wq); |
2624 | SET_DEVICE_OP(dev_ops, dealloc_dm); | |
d0899892 | 2625 | SET_DEVICE_OP(dev_ops, dealloc_driver); |
3023a1e9 KH |
2626 | SET_DEVICE_OP(dev_ops, dealloc_mw); |
2627 | SET_DEVICE_OP(dev_ops, dealloc_pd); | |
2628 | SET_DEVICE_OP(dev_ops, dealloc_ucontext); | |
2629 | SET_DEVICE_OP(dev_ops, dealloc_xrcd); | |
2630 | SET_DEVICE_OP(dev_ops, del_gid); | |
2631 | SET_DEVICE_OP(dev_ops, dereg_mr); | |
2632 | SET_DEVICE_OP(dev_ops, destroy_ah); | |
2633 | SET_DEVICE_OP(dev_ops, destroy_counters); | |
2634 | SET_DEVICE_OP(dev_ops, destroy_cq); | |
2635 | SET_DEVICE_OP(dev_ops, destroy_flow); | |
2636 | SET_DEVICE_OP(dev_ops, destroy_flow_action); | |
2637 | SET_DEVICE_OP(dev_ops, destroy_qp); | |
2638 | SET_DEVICE_OP(dev_ops, destroy_rwq_ind_table); | |
2639 | SET_DEVICE_OP(dev_ops, destroy_srq); | |
2640 | SET_DEVICE_OP(dev_ops, destroy_wq); | |
915e4af5 | 2641 | SET_DEVICE_OP(dev_ops, device_group); |
3023a1e9 KH |
2642 | SET_DEVICE_OP(dev_ops, detach_mcast); |
2643 | SET_DEVICE_OP(dev_ops, disassociate_ucontext); | |
2644 | SET_DEVICE_OP(dev_ops, drain_rq); | |
2645 | SET_DEVICE_OP(dev_ops, drain_sq); | |
ca22354b | 2646 | SET_DEVICE_OP(dev_ops, enable_driver); |
211cd945 | 2647 | SET_DEVICE_OP(dev_ops, fill_res_cm_id_entry); |
9e2a187a | 2648 | SET_DEVICE_OP(dev_ops, fill_res_cq_entry); |
65959522 | 2649 | SET_DEVICE_OP(dev_ops, fill_res_cq_entry_raw); |
f4434529 | 2650 | SET_DEVICE_OP(dev_ops, fill_res_mr_entry); |
65959522 | 2651 | SET_DEVICE_OP(dev_ops, fill_res_mr_entry_raw); |
5cc34116 | 2652 | SET_DEVICE_OP(dev_ops, fill_res_qp_entry); |
65959522 | 2653 | SET_DEVICE_OP(dev_ops, fill_res_qp_entry_raw); |
f4434529 | 2654 | SET_DEVICE_OP(dev_ops, fill_stat_mr_entry); |
3023a1e9 KH |
2655 | SET_DEVICE_OP(dev_ops, get_dev_fw_str); |
2656 | SET_DEVICE_OP(dev_ops, get_dma_mr); | |
2657 | SET_DEVICE_OP(dev_ops, get_hw_stats); | |
2658 | SET_DEVICE_OP(dev_ops, get_link_layer); | |
2659 | SET_DEVICE_OP(dev_ops, get_netdev); | |
514aee66 | 2660 | SET_DEVICE_OP(dev_ops, get_numa_node); |
3023a1e9 KH |
2661 | SET_DEVICE_OP(dev_ops, get_port_immutable); |
2662 | SET_DEVICE_OP(dev_ops, get_vector_affinity); | |
2663 | SET_DEVICE_OP(dev_ops, get_vf_config); | |
bfcb3c5d | 2664 | SET_DEVICE_OP(dev_ops, get_vf_guid); |
3023a1e9 | 2665 | SET_DEVICE_OP(dev_ops, get_vf_stats); |
dd05cb82 KH |
2666 | SET_DEVICE_OP(dev_ops, iw_accept); |
2667 | SET_DEVICE_OP(dev_ops, iw_add_ref); | |
2668 | SET_DEVICE_OP(dev_ops, iw_connect); | |
2669 | SET_DEVICE_OP(dev_ops, iw_create_listen); | |
2670 | SET_DEVICE_OP(dev_ops, iw_destroy_listen); | |
2671 | SET_DEVICE_OP(dev_ops, iw_get_qp); | |
2672 | SET_DEVICE_OP(dev_ops, iw_reject); | |
2673 | SET_DEVICE_OP(dev_ops, iw_rem_ref); | |
3023a1e9 | 2674 | SET_DEVICE_OP(dev_ops, map_mr_sg); |
2cdfcdd8 | 2675 | SET_DEVICE_OP(dev_ops, map_mr_sg_pi); |
3023a1e9 | 2676 | SET_DEVICE_OP(dev_ops, mmap); |
3411f9f0 | 2677 | SET_DEVICE_OP(dev_ops, mmap_free); |
3023a1e9 KH |
2678 | SET_DEVICE_OP(dev_ops, modify_ah); |
2679 | SET_DEVICE_OP(dev_ops, modify_cq); | |
2680 | SET_DEVICE_OP(dev_ops, modify_device); | |
5e2ddd1e | 2681 | SET_DEVICE_OP(dev_ops, modify_hw_stat); |
3023a1e9 KH |
2682 | SET_DEVICE_OP(dev_ops, modify_port); |
2683 | SET_DEVICE_OP(dev_ops, modify_qp); | |
2684 | SET_DEVICE_OP(dev_ops, modify_srq); | |
2685 | SET_DEVICE_OP(dev_ops, modify_wq); | |
2686 | SET_DEVICE_OP(dev_ops, peek_cq); | |
2687 | SET_DEVICE_OP(dev_ops, poll_cq); | |
d7407d16 | 2688 | SET_DEVICE_OP(dev_ops, port_groups); |
3023a1e9 KH |
2689 | SET_DEVICE_OP(dev_ops, post_recv); |
2690 | SET_DEVICE_OP(dev_ops, post_send); | |
2691 | SET_DEVICE_OP(dev_ops, post_srq_recv); | |
2692 | SET_DEVICE_OP(dev_ops, process_mad); | |
2693 | SET_DEVICE_OP(dev_ops, query_ah); | |
2694 | SET_DEVICE_OP(dev_ops, query_device); | |
2695 | SET_DEVICE_OP(dev_ops, query_gid); | |
2696 | SET_DEVICE_OP(dev_ops, query_pkey); | |
2697 | SET_DEVICE_OP(dev_ops, query_port); | |
2698 | SET_DEVICE_OP(dev_ops, query_qp); | |
2699 | SET_DEVICE_OP(dev_ops, query_srq); | |
1c8fb1ea | 2700 | SET_DEVICE_OP(dev_ops, query_ucontext); |
3023a1e9 KH |
2701 | SET_DEVICE_OP(dev_ops, rdma_netdev_get_params); |
2702 | SET_DEVICE_OP(dev_ops, read_counters); | |
2703 | SET_DEVICE_OP(dev_ops, reg_dm_mr); | |
2704 | SET_DEVICE_OP(dev_ops, reg_user_mr); | |
3bc489e8 | 2705 | SET_DEVICE_OP(dev_ops, reg_user_mr_dmabuf); |
3023a1e9 KH |
2706 | SET_DEVICE_OP(dev_ops, req_notify_cq); |
2707 | SET_DEVICE_OP(dev_ops, rereg_user_mr); | |
2708 | SET_DEVICE_OP(dev_ops, resize_cq); | |
2709 | SET_DEVICE_OP(dev_ops, set_vf_guid); | |
2710 | SET_DEVICE_OP(dev_ops, set_vf_link_state); | |
21a428a0 | 2711 | |
d3456914 | 2712 | SET_OBJ_SIZE(dev_ops, ib_ah); |
3b023e1b | 2713 | SET_OBJ_SIZE(dev_ops, ib_counters); |
e39afe3d | 2714 | SET_OBJ_SIZE(dev_ops, ib_cq); |
d18bb3e1 | 2715 | SET_OBJ_SIZE(dev_ops, ib_mw); |
21a428a0 | 2716 | SET_OBJ_SIZE(dev_ops, ib_pd); |
514aee66 | 2717 | SET_OBJ_SIZE(dev_ops, ib_qp); |
c0a6b5ec | 2718 | SET_OBJ_SIZE(dev_ops, ib_rwq_ind_table); |
68e326de | 2719 | SET_OBJ_SIZE(dev_ops, ib_srq); |
a2a074ef | 2720 | SET_OBJ_SIZE(dev_ops, ib_ucontext); |
28ad5f65 | 2721 | SET_OBJ_SIZE(dev_ops, ib_xrcd); |
521ed0d9 KH |
2722 | } |
2723 | EXPORT_SYMBOL(ib_set_device_ops); | |
2724 | ||
5a7a9e03 CH |
2725 | #ifdef CONFIG_INFINIBAND_VIRT_DMA |
2726 | int ib_dma_virt_map_sg(struct ib_device *dev, struct scatterlist *sg, int nents) | |
2727 | { | |
2728 | struct scatterlist *s; | |
2729 | int i; | |
2730 | ||
2731 | for_each_sg(sg, s, nents, i) { | |
2732 | sg_dma_address(s) = (uintptr_t)sg_virt(s); | |
2733 | sg_dma_len(s) = s->length; | |
2734 | } | |
2735 | return nents; | |
2736 | } | |
2737 | EXPORT_SYMBOL(ib_dma_virt_map_sg); | |
2738 | #endif /* CONFIG_INFINIBAND_VIRT_DMA */ | |
2739 | ||
d0e312fe | 2740 | static const struct rdma_nl_cbs ibnl_ls_cb_table[RDMA_NL_LS_NUM_OPS] = { |
735c631a | 2741 | [RDMA_NL_LS_OP_RESOLVE] = { |
647c75ac | 2742 | .doit = ib_nl_handle_resolve_resp, |
e3a2b93d LR |
2743 | .flags = RDMA_NL_ADMIN_PERM, |
2744 | }, | |
735c631a | 2745 | [RDMA_NL_LS_OP_SET_TIMEOUT] = { |
647c75ac | 2746 | .doit = ib_nl_handle_set_timeout, |
e3a2b93d LR |
2747 | .flags = RDMA_NL_ADMIN_PERM, |
2748 | }, | |
ae43f828 | 2749 | [RDMA_NL_LS_OP_IP_RESOLVE] = { |
647c75ac | 2750 | .doit = ib_nl_handle_ip_res_resp, |
e3a2b93d LR |
2751 | .flags = RDMA_NL_ADMIN_PERM, |
2752 | }, | |
735c631a MB |
2753 | }; |
2754 | ||
1da177e4 LT |
2755 | static int __init ib_core_init(void) |
2756 | { | |
ff815a89 | 2757 | int ret = -ENOMEM; |
1da177e4 | 2758 | |
f0626710 TH |
2759 | ib_wq = alloc_workqueue("infiniband", 0, 0); |
2760 | if (!ib_wq) | |
2761 | return -ENOMEM; | |
2762 | ||
ff815a89 TH |
2763 | ib_unreg_wq = alloc_workqueue("ib-unreg-wq", WQ_UNBOUND, |
2764 | WQ_UNBOUND_MAX_ACTIVE); | |
2765 | if (!ib_unreg_wq) | |
2766 | goto err; | |
2767 | ||
14d3a3b2 | 2768 | ib_comp_wq = alloc_workqueue("ib-comp-wq", |
b7363e67 | 2769 | WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, 0); |
ff815a89 TH |
2770 | if (!ib_comp_wq) |
2771 | goto err_unbound; | |
14d3a3b2 | 2772 | |
f794809a JM |
2773 | ib_comp_unbound_wq = |
2774 | alloc_workqueue("ib-comp-unb-wq", | |
2775 | WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM | | |
2776 | WQ_SYSFS, WQ_UNBOUND_MAX_ACTIVE); | |
ff815a89 | 2777 | if (!ib_comp_unbound_wq) |
f794809a | 2778 | goto err_comp; |
f794809a | 2779 | |
55aeed06 | 2780 | ret = class_register(&ib_class); |
fd75c789 | 2781 | if (ret) { |
aba25a3e | 2782 | pr_warn("Couldn't create InfiniBand device class\n"); |
f794809a | 2783 | goto err_comp_unbound; |
fd75c789 | 2784 | } |
1da177e4 | 2785 | |
549af008 PP |
2786 | rdma_nl_init(); |
2787 | ||
e3f20f02 LR |
2788 | ret = addr_init(); |
2789 | if (ret) { | |
4469add9 | 2790 | pr_warn("Couldn't init IB address resolution\n"); |
e3f20f02 LR |
2791 | goto err_ibnl; |
2792 | } | |
2793 | ||
4c2cb422 MB |
2794 | ret = ib_mad_init(); |
2795 | if (ret) { | |
2796 | pr_warn("Couldn't init IB MAD\n"); | |
2797 | goto err_addr; | |
2798 | } | |
2799 | ||
c2e49c92 MB |
2800 | ret = ib_sa_init(); |
2801 | if (ret) { | |
2802 | pr_warn("Couldn't init SA\n"); | |
2803 | goto err_mad; | |
2804 | } | |
2805 | ||
42df744c | 2806 | ret = register_blocking_lsm_notifier(&ibdev_lsm_nb); |
8f408ab6 DJ |
2807 | if (ret) { |
2808 | pr_warn("Couldn't register LSM notifier. ret %d\n", ret); | |
c9901724 | 2809 | goto err_sa; |
8f408ab6 DJ |
2810 | } |
2811 | ||
4e0f7b90 PP |
2812 | ret = register_pernet_device(&rdma_dev_net_ops); |
2813 | if (ret) { | |
2814 | pr_warn("Couldn't init compat dev. ret %d\n", ret); | |
2815 | goto err_compat; | |
2816 | } | |
2817 | ||
6c80b41a | 2818 | nldev_init(); |
c9901724 | 2819 | rdma_nl_register(RDMA_NL_LS, ibnl_ls_cb_table); |
07c0d131 CZ |
2820 | ret = roce_gid_mgmt_init(); |
2821 | if (ret) { | |
2822 | pr_warn("Couldn't init RoCE GID management\n"); | |
2823 | goto err_parent; | |
2824 | } | |
1da177e4 | 2825 | |
fd75c789 NM |
2826 | return 0; |
2827 | ||
07c0d131 CZ |
2828 | err_parent: |
2829 | rdma_nl_unregister(RDMA_NL_LS); | |
2830 | nldev_exit(); | |
2831 | unregister_pernet_device(&rdma_dev_net_ops); | |
4e0f7b90 | 2832 | err_compat: |
42df744c | 2833 | unregister_blocking_lsm_notifier(&ibdev_lsm_nb); |
735c631a MB |
2834 | err_sa: |
2835 | ib_sa_cleanup(); | |
c2e49c92 MB |
2836 | err_mad: |
2837 | ib_mad_cleanup(); | |
4c2cb422 MB |
2838 | err_addr: |
2839 | addr_cleanup(); | |
e3f20f02 | 2840 | err_ibnl: |
55aeed06 | 2841 | class_unregister(&ib_class); |
f794809a JM |
2842 | err_comp_unbound: |
2843 | destroy_workqueue(ib_comp_unbound_wq); | |
14d3a3b2 CH |
2844 | err_comp: |
2845 | destroy_workqueue(ib_comp_wq); | |
ff815a89 TH |
2846 | err_unbound: |
2847 | destroy_workqueue(ib_unreg_wq); | |
fd75c789 NM |
2848 | err: |
2849 | destroy_workqueue(ib_wq); | |
1da177e4 LT |
2850 | return ret; |
2851 | } | |
2852 | ||
2853 | static void __exit ib_core_cleanup(void) | |
2854 | { | |
5ef8c0c1 | 2855 | roce_gid_mgmt_cleanup(); |
c9901724 | 2856 | rdma_nl_unregister(RDMA_NL_LS); |
4508d32c | 2857 | nldev_exit(); |
4e0f7b90 | 2858 | unregister_pernet_device(&rdma_dev_net_ops); |
42df744c | 2859 | unregister_blocking_lsm_notifier(&ibdev_lsm_nb); |
c2e49c92 | 2860 | ib_sa_cleanup(); |
4c2cb422 | 2861 | ib_mad_cleanup(); |
e3f20f02 | 2862 | addr_cleanup(); |
c9901724 | 2863 | rdma_nl_exit(); |
55aeed06 | 2864 | class_unregister(&ib_class); |
f794809a | 2865 | destroy_workqueue(ib_comp_unbound_wq); |
14d3a3b2 | 2866 | destroy_workqueue(ib_comp_wq); |
f7c6a7b5 | 2867 | /* Make sure that any pending umem accounting work is done. */ |
f0626710 | 2868 | destroy_workqueue(ib_wq); |
ff815a89 | 2869 | destroy_workqueue(ib_unreg_wq); |
e59178d8 | 2870 | WARN_ON(!xa_empty(&clients)); |
0df91bb6 | 2871 | WARN_ON(!xa_empty(&devices)); |
1da177e4 LT |
2872 | } |
2873 | ||
e3bf14bd JG |
2874 | MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS, 4); |
2875 | ||
62dfa795 PP |
2876 | /* ib core relies on netdev stack to first register net_ns_type_operations |
2877 | * ns kobject type before ib_core initialization. | |
2878 | */ | |
2879 | fs_initcall(ib_core_init); | |
1da177e4 | 2880 | module_exit(ib_core_cleanup); |