2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
34 #include <linux/module.h>
35 #include <linux/string.h>
36 #include <linux/errno.h>
37 #include <linux/kernel.h>
38 #include <linux/slab.h>
39 #include <linux/init.h>
40 #include <linux/netdevice.h>
41 #include <linux/security.h>
42 #include <linux/notifier.h>
43 #include <linux/hashtable.h>
44 #include <rdma/rdma_netlink.h>
45 #include <rdma/ib_addr.h>
46 #include <rdma/ib_cache.h>
48 #include "core_priv.h"
51 MODULE_AUTHOR("Roland Dreier");
52 MODULE_DESCRIPTION("core kernel InfiniBand API");
53 MODULE_LICENSE("Dual BSD/GPL");
55 struct workqueue_struct *ib_comp_wq;
56 struct workqueue_struct *ib_comp_unbound_wq;
57 struct workqueue_struct *ib_wq;
58 EXPORT_SYMBOL_GPL(ib_wq);
61 * Each of the three rwsem locks (devices, clients, client_data) protects the
62 * xarray of the same name. Specifically it allows the caller to assert that
63 * the MARK will/will not be changing under the lock, and for devices and
64 * clients, that the value in the xarray is still a valid pointer. Change of
65 * the MARK is linked to the object state, so holding the lock and testing the
66 * MARK also asserts that the contained object is in a certain state.
68 * This is used to build a two stage register/unregister flow where objects
69 * can continue to be in the xarray even though they are still in progress to
70 * register/unregister.
72 * The xarray itself provides additional locking, and restartable iteration,
73 * which is also relied on.
75 * Locks should not be nested, with the exception of client_data, which is
76 * allowed to nest under the read side of the other two locks.
78 * The devices_rwsem also protects the device name list, any change or
79 * assignment of device name must also hold the write side to guarantee unique
84 * devices contains devices that have had their names assigned. The
85 * devices may not be registered. Users that care about the registration
86 * status need to call ib_device_try_get() on the device to ensure it is
87 * registered, and keep it registered, for the required duration.
90 static DEFINE_XARRAY_FLAGS(devices, XA_FLAGS_ALLOC);
91 static DECLARE_RWSEM(devices_rwsem);
92 #define DEVICE_REGISTERED XA_MARK_1
94 static LIST_HEAD(client_list);
95 #define CLIENT_REGISTERED XA_MARK_1
96 static DEFINE_XARRAY_FLAGS(clients, XA_FLAGS_ALLOC);
97 static DECLARE_RWSEM(clients_rwsem);
100 * If client_data is registered then the corresponding client must also still
103 #define CLIENT_DATA_REGISTERED XA_MARK_1
105 * xarray has this behavior where it won't iterate over NULL values stored in
106 * allocated arrays. So we need our own iterator to see all values stored in
107 * the array. This does the same thing as xa_for_each except that it also
108 * returns NULL valued entries if the array is allocating. Simplified to only
109 * work on simple xarrays.
111 static void *xan_find_marked(struct xarray *xa, unsigned long *indexp,
114 XA_STATE(xas, xa, *indexp);
119 entry = xas_find_marked(&xas, ULONG_MAX, filter);
120 if (xa_is_zero(entry))
122 } while (xas_retry(&xas, entry));
126 *indexp = xas.xa_index;
127 if (xa_is_zero(entry))
131 return XA_ERROR(-ENOENT);
133 #define xan_for_each_marked(xa, index, entry, filter) \
134 for (index = 0, entry = xan_find_marked(xa, &(index), filter); \
136 (index)++, entry = xan_find_marked(xa, &(index), filter))
138 /* RCU hash table mapping netdevice pointers to struct ib_port_data */
139 static DEFINE_SPINLOCK(ndev_hash_lock);
140 static DECLARE_HASHTABLE(ndev_hash, 5);
142 static void free_netdevs(struct ib_device *ib_dev);
143 static void ib_unregister_work(struct work_struct *work);
144 static void __ib_unregister_device(struct ib_device *device);
145 static int ib_security_change(struct notifier_block *nb, unsigned long event,
147 static void ib_policy_change_task(struct work_struct *work);
148 static DECLARE_WORK(ib_policy_change_work, ib_policy_change_task);
150 static struct notifier_block ibdev_lsm_nb = {
151 .notifier_call = ib_security_change,
154 /* Pointer to the RCU head at the start of the ib_port_data array */
155 struct ib_port_data_rcu {
156 struct rcu_head rcu_head;
157 struct ib_port_data pdata[];
160 static int ib_device_check_mandatory(struct ib_device *device)
162 #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device_ops, x), #x }
163 static const struct {
166 } mandatory_table[] = {
167 IB_MANDATORY_FUNC(query_device),
168 IB_MANDATORY_FUNC(query_port),
169 IB_MANDATORY_FUNC(query_pkey),
170 IB_MANDATORY_FUNC(alloc_pd),
171 IB_MANDATORY_FUNC(dealloc_pd),
172 IB_MANDATORY_FUNC(create_qp),
173 IB_MANDATORY_FUNC(modify_qp),
174 IB_MANDATORY_FUNC(destroy_qp),
175 IB_MANDATORY_FUNC(post_send),
176 IB_MANDATORY_FUNC(post_recv),
177 IB_MANDATORY_FUNC(create_cq),
178 IB_MANDATORY_FUNC(destroy_cq),
179 IB_MANDATORY_FUNC(poll_cq),
180 IB_MANDATORY_FUNC(req_notify_cq),
181 IB_MANDATORY_FUNC(get_dma_mr),
182 IB_MANDATORY_FUNC(dereg_mr),
183 IB_MANDATORY_FUNC(get_port_immutable)
187 device->kverbs_provider = true;
188 for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) {
189 if (!*(void **) ((void *) &device->ops +
190 mandatory_table[i].offset)) {
191 device->kverbs_provider = false;
200 * Caller must perform ib_device_put() to return the device reference count
201 * when ib_device_get_by_index() returns valid device pointer.
203 struct ib_device *ib_device_get_by_index(u32 index)
205 struct ib_device *device;
207 down_read(&devices_rwsem);
208 device = xa_load(&devices, index);
210 if (!ib_device_try_get(device))
213 up_read(&devices_rwsem);
218 * ib_device_put - Release IB device reference
219 * @device: device whose reference to be released
221 * ib_device_put() releases reference to the IB device to allow it to be
222 * unregistered and eventually free.
224 void ib_device_put(struct ib_device *device)
226 if (refcount_dec_and_test(&device->refcount))
227 complete(&device->unreg_completion);
229 EXPORT_SYMBOL(ib_device_put);
231 static struct ib_device *__ib_device_get_by_name(const char *name)
233 struct ib_device *device;
236 xa_for_each (&devices, index, device)
237 if (!strcmp(name, dev_name(&device->dev)))
244 * ib_device_get_by_name - Find an IB device by name
245 * @name: The name to look for
246 * @driver_id: The driver ID that must match (RDMA_DRIVER_UNKNOWN matches all)
248 * Find and hold an ib_device by its name. The caller must call
249 * ib_device_put() on the returned pointer.
251 struct ib_device *ib_device_get_by_name(const char *name,
252 enum rdma_driver_id driver_id)
254 struct ib_device *device;
256 down_read(&devices_rwsem);
257 device = __ib_device_get_by_name(name);
258 if (device && driver_id != RDMA_DRIVER_UNKNOWN &&
259 device->driver_id != driver_id)
263 if (!ib_device_try_get(device))
266 up_read(&devices_rwsem);
269 EXPORT_SYMBOL(ib_device_get_by_name);
271 int ib_device_rename(struct ib_device *ibdev, const char *name)
275 down_write(&devices_rwsem);
276 if (!strcmp(name, dev_name(&ibdev->dev))) {
281 if (__ib_device_get_by_name(name)) {
286 ret = device_rename(&ibdev->dev, name);
289 strlcpy(ibdev->name, name, IB_DEVICE_NAME_MAX);
291 up_write(&devices_rwsem);
295 static int alloc_name(struct ib_device *ibdev, const char *name)
297 struct ib_device *device;
303 lockdep_assert_held_exclusive(&devices_rwsem);
305 xa_for_each (&devices, index, device) {
306 char buf[IB_DEVICE_NAME_MAX];
308 if (sscanf(dev_name(&device->dev), name, &i) != 1)
310 if (i < 0 || i >= INT_MAX)
312 snprintf(buf, sizeof buf, name, i);
313 if (strcmp(buf, dev_name(&device->dev)) != 0)
316 rc = ida_alloc_range(&inuse, i, i, GFP_KERNEL);
321 rc = ida_alloc(&inuse, GFP_KERNEL);
325 rc = dev_set_name(&ibdev->dev, name, rc);
331 static void ib_device_release(struct device *device)
333 struct ib_device *dev = container_of(device, struct ib_device, dev);
336 WARN_ON(refcount_read(&dev->refcount));
337 ib_cache_release_one(dev);
338 ib_security_release_port_pkey_list(dev);
339 xa_destroy(&dev->client_data);
341 kfree_rcu(container_of(dev->port_data, struct ib_port_data_rcu,
344 kfree_rcu(dev, rcu_head);
347 static int ib_device_uevent(struct device *device,
348 struct kobj_uevent_env *env)
350 if (add_uevent_var(env, "NAME=%s", dev_name(device)))
354 * It would be nice to pass the node GUID with the event...
360 static struct class ib_class = {
361 .name = "infiniband",
362 .dev_release = ib_device_release,
363 .dev_uevent = ib_device_uevent,
367 * _ib_alloc_device - allocate an IB device struct
368 * @size:size of structure to allocate
370 * Low-level drivers should use ib_alloc_device() to allocate &struct
371 * ib_device. @size is the size of the structure to be allocated,
372 * including any private data used by the low-level driver.
373 * ib_dealloc_device() must be used to free structures allocated with
376 struct ib_device *_ib_alloc_device(size_t size)
378 struct ib_device *device;
380 if (WARN_ON(size < sizeof(struct ib_device)))
383 device = kzalloc(size, GFP_KERNEL);
387 if (rdma_restrack_init(device)) {
392 device->dev.class = &ib_class;
393 device->groups[0] = &ib_dev_attr_group;
394 device->dev.groups = device->groups;
395 device_initialize(&device->dev);
397 INIT_LIST_HEAD(&device->event_handler_list);
398 spin_lock_init(&device->event_handler_lock);
399 mutex_init(&device->unregistration_lock);
401 * client_data needs to be alloc because we don't want our mark to be
402 * destroyed if the user stores NULL in the client data.
404 xa_init_flags(&device->client_data, XA_FLAGS_ALLOC);
405 init_rwsem(&device->client_data_rwsem);
406 INIT_LIST_HEAD(&device->port_list);
407 init_completion(&device->unreg_completion);
408 INIT_WORK(&device->unregistration_work, ib_unregister_work);
412 EXPORT_SYMBOL(_ib_alloc_device);
415 * ib_dealloc_device - free an IB device struct
416 * @device:structure to free
418 * Free a structure allocated with ib_alloc_device().
420 void ib_dealloc_device(struct ib_device *device)
422 if (device->ops.dealloc_driver)
423 device->ops.dealloc_driver(device);
426 * ib_unregister_driver() requires all devices to remain in the xarray
427 * while their ops are callable. The last op we call is dealloc_driver
428 * above. This is needed to create a fence on op callbacks prior to
429 * allowing the driver module to unload.
431 down_write(&devices_rwsem);
432 if (xa_load(&devices, device->index) == device)
433 xa_erase(&devices, device->index);
434 up_write(&devices_rwsem);
436 /* Expedite releasing netdev references */
437 free_netdevs(device);
439 WARN_ON(!xa_empty(&device->client_data));
440 WARN_ON(refcount_read(&device->refcount));
441 rdma_restrack_clean(device);
442 /* Balances with device_initialize */
443 put_device(&device->dev);
445 EXPORT_SYMBOL(ib_dealloc_device);
448 * add_client_context() and remove_client_context() must be safe against
449 * parallel calls on the same device - registration/unregistration of both the
450 * device and client can be occurring in parallel.
452 * The routines need to be a fence, any caller must not return until the add
453 * or remove is fully completed.
455 static int add_client_context(struct ib_device *device,
456 struct ib_client *client)
460 if (!device->kverbs_provider && !client->no_kverbs_req)
463 down_write(&device->client_data_rwsem);
465 * Another caller to add_client_context got here first and has already
466 * completely initialized context.
468 if (xa_get_mark(&device->client_data, client->client_id,
469 CLIENT_DATA_REGISTERED))
472 ret = xa_err(xa_store(&device->client_data, client->client_id, NULL,
476 downgrade_write(&device->client_data_rwsem);
480 /* Readers shall not see a client until add has been completed */
481 xa_set_mark(&device->client_data, client->client_id,
482 CLIENT_DATA_REGISTERED);
483 up_read(&device->client_data_rwsem);
487 up_write(&device->client_data_rwsem);
491 static void remove_client_context(struct ib_device *device,
492 unsigned int client_id)
494 struct ib_client *client;
497 down_write(&device->client_data_rwsem);
498 if (!xa_get_mark(&device->client_data, client_id,
499 CLIENT_DATA_REGISTERED)) {
500 up_write(&device->client_data_rwsem);
503 client_data = xa_load(&device->client_data, client_id);
504 xa_clear_mark(&device->client_data, client_id, CLIENT_DATA_REGISTERED);
505 client = xa_load(&clients, client_id);
506 downgrade_write(&device->client_data_rwsem);
509 * Notice we cannot be holding any exclusive locks when calling the
510 * remove callback as the remove callback can recurse back into any
511 * public functions in this module and thus try for any locks those
514 * For this reason clients and drivers should not call the
515 * unregistration functions will holdling any locks.
517 * It tempting to drop the client_data_rwsem too, but this is required
518 * to ensure that unregister_client does not return until all clients
519 * are completely unregistered, which is required to avoid module
523 client->remove(device, client_data);
525 xa_erase(&device->client_data, client_id);
526 up_read(&device->client_data_rwsem);
529 static int alloc_port_data(struct ib_device *device)
531 struct ib_port_data_rcu *pdata_rcu;
534 if (device->port_data)
537 /* This can only be called once the physical port range is defined */
538 if (WARN_ON(!device->phys_port_cnt))
542 * device->port_data is indexed directly by the port number to make
543 * access to this data as efficient as possible.
545 * Therefore port_data is declared as a 1 based array with potential
546 * empty slots at the beginning.
548 pdata_rcu = kzalloc(struct_size(pdata_rcu, pdata,
549 rdma_end_port(device) + 1),
554 * The rcu_head is put in front of the port data array and the stored
555 * pointer is adjusted since we never need to see that member until
558 device->port_data = pdata_rcu->pdata;
560 rdma_for_each_port (device, port) {
561 struct ib_port_data *pdata = &device->port_data[port];
563 pdata->ib_dev = device;
564 spin_lock_init(&pdata->pkey_list_lock);
565 INIT_LIST_HEAD(&pdata->pkey_list);
566 spin_lock_init(&pdata->netdev_lock);
567 INIT_HLIST_NODE(&pdata->ndev_hash_link);
572 static int verify_immutable(const struct ib_device *dev, u8 port)
574 return WARN_ON(!rdma_cap_ib_mad(dev, port) &&
575 rdma_max_mad_size(dev, port) != 0);
578 static int setup_port_data(struct ib_device *device)
583 ret = alloc_port_data(device);
587 rdma_for_each_port (device, port) {
588 struct ib_port_data *pdata = &device->port_data[port];
590 ret = device->ops.get_port_immutable(device, port,
595 if (verify_immutable(device, port))
601 void ib_get_device_fw_str(struct ib_device *dev, char *str)
603 if (dev->ops.get_dev_fw_str)
604 dev->ops.get_dev_fw_str(dev, str);
608 EXPORT_SYMBOL(ib_get_device_fw_str);
610 static void ib_policy_change_task(struct work_struct *work)
612 struct ib_device *dev;
615 down_read(&devices_rwsem);
616 xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) {
619 rdma_for_each_port (dev, i) {
621 int ret = ib_get_cached_subnet_prefix(dev,
626 "ib_get_cached_subnet_prefix err: %d, this should never happen here\n",
629 ib_security_cache_change(dev, i, sp);
632 up_read(&devices_rwsem);
635 static int ib_security_change(struct notifier_block *nb, unsigned long event,
638 if (event != LSM_POLICY_CHANGE)
641 schedule_work(&ib_policy_change_work);
642 ib_mad_agent_security_change();
648 * Assign the unique string device name and the unique device index. This is
649 * undone by ib_dealloc_device.
651 static int assign_name(struct ib_device *device, const char *name)
656 down_write(&devices_rwsem);
657 /* Assign a unique name to the device */
658 if (strchr(name, '%'))
659 ret = alloc_name(device, name);
661 ret = dev_set_name(&device->dev, name);
665 if (__ib_device_get_by_name(dev_name(&device->dev))) {
669 strlcpy(device->name, dev_name(&device->dev), IB_DEVICE_NAME_MAX);
671 ret = xa_alloc_cyclic(&devices, &device->index, device, xa_limit_31b,
672 &last_id, GFP_KERNEL);
677 up_write(&devices_rwsem);
681 static void setup_dma_device(struct ib_device *device)
683 struct device *parent = device->dev.parent;
685 WARN_ON_ONCE(device->dma_device);
686 if (device->dev.dma_ops) {
688 * The caller provided custom DMA operations. Copy the
689 * DMA-related fields that are used by e.g. dma_alloc_coherent()
692 device->dma_device = &device->dev;
693 if (!device->dev.dma_mask) {
695 device->dev.dma_mask = parent->dma_mask;
699 if (!device->dev.coherent_dma_mask) {
701 device->dev.coherent_dma_mask =
702 parent->coherent_dma_mask;
708 * The caller did not provide custom DMA operations. Use the
709 * DMA mapping operations of the parent device.
711 WARN_ON_ONCE(!parent);
712 device->dma_device = parent;
717 * setup_device() allocates memory and sets up data that requires calling the
718 * device ops, this is the only reason these actions are not done during
719 * ib_alloc_device. It is undone by ib_dealloc_device().
721 static int setup_device(struct ib_device *device)
723 struct ib_udata uhw = {.outlen = 0, .inlen = 0};
726 setup_dma_device(device);
728 ret = ib_device_check_mandatory(device);
732 ret = setup_port_data(device);
734 dev_warn(&device->dev, "Couldn't create per-port data\n");
738 memset(&device->attrs, 0, sizeof(device->attrs));
739 ret = device->ops.query_device(device, &device->attrs, &uhw);
741 dev_warn(&device->dev,
742 "Couldn't query the device attributes\n");
749 static void disable_device(struct ib_device *device)
751 struct ib_client *client;
753 WARN_ON(!refcount_read(&device->refcount));
755 down_write(&devices_rwsem);
756 xa_clear_mark(&devices, device->index, DEVICE_REGISTERED);
757 up_write(&devices_rwsem);
759 down_read(&clients_rwsem);
760 list_for_each_entry_reverse(client, &client_list, list)
761 remove_client_context(device, client->client_id);
762 up_read(&clients_rwsem);
764 /* Pairs with refcount_set in enable_device */
765 ib_device_put(device);
766 wait_for_completion(&device->unreg_completion);
768 /* Expedite removing unregistered pointers from the hash table */
769 free_netdevs(device);
773 * An enabled device is visible to all clients and to all the public facing
774 * APIs that return a device pointer. This always returns with a new get, even
777 static int enable_device_and_get(struct ib_device *device)
779 struct ib_client *client;
784 * One ref belongs to the xa and the other belongs to this
785 * thread. This is needed to guard against parallel unregistration.
787 refcount_set(&device->refcount, 2);
788 down_write(&devices_rwsem);
789 xa_set_mark(&devices, device->index, DEVICE_REGISTERED);
792 * By using downgrade_write() we ensure that no other thread can clear
793 * DEVICE_REGISTERED while we are completing the client setup.
795 downgrade_write(&devices_rwsem);
797 if (device->ops.enable_driver) {
798 ret = device->ops.enable_driver(device);
803 down_read(&clients_rwsem);
804 xa_for_each_marked (&clients, index, client, CLIENT_REGISTERED) {
805 ret = add_client_context(device, client);
809 up_read(&clients_rwsem);
812 up_read(&devices_rwsem);
817 * ib_register_device - Register an IB device with IB core
818 * @device:Device to register
820 * Low-level drivers use ib_register_device() to register their
821 * devices with the IB core. All registered clients will receive a
822 * callback for each device that is added. @device must be allocated
823 * with ib_alloc_device().
825 * If the driver uses ops.dealloc_driver and calls any ib_unregister_device()
826 * asynchronously then the device pointer may become freed as soon as this
829 int ib_register_device(struct ib_device *device, const char *name)
833 ret = assign_name(device, name);
837 ret = setup_device(device);
841 ret = ib_cache_setup_one(device);
843 dev_warn(&device->dev,
844 "Couldn't set up InfiniBand P_Key/GID cache\n");
848 ib_device_register_rdmacg(device);
850 ret = device_add(&device->dev);
854 ret = ib_device_register_sysfs(device);
856 dev_warn(&device->dev,
857 "Couldn't register device with driver model\n");
861 ret = enable_device_and_get(device);
863 void (*dealloc_fn)(struct ib_device *);
866 * If we hit this error flow then we don't want to
867 * automatically dealloc the device since the caller is
868 * expected to call ib_dealloc_device() after
869 * ib_register_device() fails. This is tricky due to the
870 * possibility for a parallel unregistration along with this
871 * error flow. Since we have a refcount here we know any
872 * parallel flow is stopped in disable_device and will see the
873 * NULL pointers, causing the responsibility to
874 * ib_dealloc_device() to revert back to this thread.
876 dealloc_fn = device->ops.dealloc_driver;
877 device->ops.dealloc_driver = NULL;
878 ib_device_put(device);
879 __ib_unregister_device(device);
880 device->ops.dealloc_driver = dealloc_fn;
883 ib_device_put(device);
888 device_del(&device->dev);
890 ib_device_unregister_rdmacg(device);
891 ib_cache_cleanup_one(device);
894 EXPORT_SYMBOL(ib_register_device);
896 /* Callers must hold a get on the device. */
897 static void __ib_unregister_device(struct ib_device *ib_dev)
900 * We have a registration lock so that all the calls to unregister are
901 * fully fenced, once any unregister returns the device is truely
902 * unregistered even if multiple callers are unregistering it at the
903 * same time. This also interacts with the registration flow and
904 * provides sane semantics if register and unregister are racing.
906 mutex_lock(&ib_dev->unregistration_lock);
907 if (!refcount_read(&ib_dev->refcount))
910 disable_device(ib_dev);
911 ib_device_unregister_sysfs(ib_dev);
912 device_del(&ib_dev->dev);
913 ib_device_unregister_rdmacg(ib_dev);
914 ib_cache_cleanup_one(ib_dev);
917 * Drivers using the new flow may not call ib_dealloc_device except
918 * in error unwind prior to registration success.
920 if (ib_dev->ops.dealloc_driver) {
921 WARN_ON(kref_read(&ib_dev->dev.kobj.kref) <= 1);
922 ib_dealloc_device(ib_dev);
925 mutex_unlock(&ib_dev->unregistration_lock);
929 * ib_unregister_device - Unregister an IB device
930 * @device: The device to unregister
932 * Unregister an IB device. All clients will receive a remove callback.
934 * Callers should call this routine only once, and protect against races with
935 * registration. Typically it should only be called as part of a remove
936 * callback in an implementation of driver core's struct device_driver and
939 * If ops.dealloc_driver is used then ib_dev will be freed upon return from
942 void ib_unregister_device(struct ib_device *ib_dev)
944 get_device(&ib_dev->dev);
945 __ib_unregister_device(ib_dev);
946 put_device(&ib_dev->dev);
948 EXPORT_SYMBOL(ib_unregister_device);
951 * ib_unregister_device_and_put - Unregister a device while holding a 'get'
952 * device: The device to unregister
954 * This is the same as ib_unregister_device(), except it includes an internal
955 * ib_device_put() that should match a 'get' obtained by the caller.
957 * It is safe to call this routine concurrently from multiple threads while
958 * holding the 'get'. When the function returns the device is fully
961 * Drivers using this flow MUST use the driver_unregister callback to clean up
962 * their resources associated with the device and dealloc it.
964 void ib_unregister_device_and_put(struct ib_device *ib_dev)
966 WARN_ON(!ib_dev->ops.dealloc_driver);
967 get_device(&ib_dev->dev);
968 ib_device_put(ib_dev);
969 __ib_unregister_device(ib_dev);
970 put_device(&ib_dev->dev);
972 EXPORT_SYMBOL(ib_unregister_device_and_put);
975 * ib_unregister_driver - Unregister all IB devices for a driver
976 * @driver_id: The driver to unregister
978 * This implements a fence for device unregistration. It only returns once all
979 * devices associated with the driver_id have fully completed their
980 * unregistration and returned from ib_unregister_device*().
982 * If device's are not yet unregistered it goes ahead and starts unregistering
985 * This does not block creation of new devices with the given driver_id, that
986 * is the responsibility of the caller.
988 void ib_unregister_driver(enum rdma_driver_id driver_id)
990 struct ib_device *ib_dev;
993 down_read(&devices_rwsem);
994 xa_for_each (&devices, index, ib_dev) {
995 if (ib_dev->driver_id != driver_id)
998 get_device(&ib_dev->dev);
999 up_read(&devices_rwsem);
1001 WARN_ON(!ib_dev->ops.dealloc_driver);
1002 __ib_unregister_device(ib_dev);
1004 put_device(&ib_dev->dev);
1005 down_read(&devices_rwsem);
1007 up_read(&devices_rwsem);
1009 EXPORT_SYMBOL(ib_unregister_driver);
1011 static void ib_unregister_work(struct work_struct *work)
1013 struct ib_device *ib_dev =
1014 container_of(work, struct ib_device, unregistration_work);
1016 __ib_unregister_device(ib_dev);
1017 put_device(&ib_dev->dev);
1021 * ib_unregister_device_queued - Unregister a device using a work queue
1022 * device: The device to unregister
1024 * This schedules an asynchronous unregistration using a WQ for the device. A
1025 * driver should use this to avoid holding locks while doing unregistration,
1026 * such as holding the RTNL lock.
1028 * Drivers using this API must use ib_unregister_driver before module unload
1029 * to ensure that all scheduled unregistrations have completed.
1031 void ib_unregister_device_queued(struct ib_device *ib_dev)
1033 WARN_ON(!refcount_read(&ib_dev->refcount));
1034 WARN_ON(!ib_dev->ops.dealloc_driver);
1035 get_device(&ib_dev->dev);
1036 if (!queue_work(system_unbound_wq, &ib_dev->unregistration_work))
1037 put_device(&ib_dev->dev);
1039 EXPORT_SYMBOL(ib_unregister_device_queued);
1041 static int assign_client_id(struct ib_client *client)
1045 down_write(&clients_rwsem);
1047 * The add/remove callbacks must be called in FIFO/LIFO order. To
1048 * achieve this we assign client_ids so they are sorted in
1049 * registration order, and retain a linked list we can reverse iterate
1050 * to get the LIFO order. The extra linked list can go away if xarray
1051 * learns to reverse iterate.
1053 if (list_empty(&client_list)) {
1054 client->client_id = 0;
1056 struct ib_client *last;
1058 last = list_last_entry(&client_list, struct ib_client, list);
1059 client->client_id = last->client_id + 1;
1061 ret = xa_insert(&clients, client->client_id, client, GFP_KERNEL);
1065 xa_set_mark(&clients, client->client_id, CLIENT_REGISTERED);
1066 list_add_tail(&client->list, &client_list);
1069 up_write(&clients_rwsem);
1074 * ib_register_client - Register an IB client
1075 * @client:Client to register
1077 * Upper level users of the IB drivers can use ib_register_client() to
1078 * register callbacks for IB device addition and removal. When an IB
1079 * device is added, each registered client's add method will be called
1080 * (in the order the clients were registered), and when a device is
1081 * removed, each client's remove method will be called (in the reverse
1082 * order that clients were registered). In addition, when
1083 * ib_register_client() is called, the client will receive an add
1084 * callback for all devices already registered.
1086 int ib_register_client(struct ib_client *client)
1088 struct ib_device *device;
1089 unsigned long index;
1092 ret = assign_client_id(client);
1096 down_read(&devices_rwsem);
1097 xa_for_each_marked (&devices, index, device, DEVICE_REGISTERED) {
1098 ret = add_client_context(device, client);
1100 up_read(&devices_rwsem);
1101 ib_unregister_client(client);
1105 up_read(&devices_rwsem);
1108 EXPORT_SYMBOL(ib_register_client);
1111 * ib_unregister_client - Unregister an IB client
1112 * @client:Client to unregister
1114 * Upper level users use ib_unregister_client() to remove their client
1115 * registration. When ib_unregister_client() is called, the client
1116 * will receive a remove callback for each IB device still registered.
1118 * This is a full fence, once it returns no client callbacks will be called,
1119 * or are running in another thread.
1121 void ib_unregister_client(struct ib_client *client)
1123 struct ib_device *device;
1124 unsigned long index;
1126 down_write(&clients_rwsem);
1127 xa_clear_mark(&clients, client->client_id, CLIENT_REGISTERED);
1128 up_write(&clients_rwsem);
1130 * Every device still known must be serialized to make sure we are
1131 * done with the client callbacks before we return.
1133 down_read(&devices_rwsem);
1134 xa_for_each (&devices, index, device)
1135 remove_client_context(device, client->client_id);
1136 up_read(&devices_rwsem);
1138 down_write(&clients_rwsem);
1139 list_del(&client->list);
1140 xa_erase(&clients, client->client_id);
1141 up_write(&clients_rwsem);
1143 EXPORT_SYMBOL(ib_unregister_client);
1146 * ib_set_client_data - Set IB client context
1147 * @device:Device to set context for
1148 * @client:Client to set context for
1149 * @data:Context to set
1151 * ib_set_client_data() sets client context data that can be retrieved with
1152 * ib_get_client_data(). This can only be called while the client is
1153 * registered to the device, once the ib_client remove() callback returns this
1156 void ib_set_client_data(struct ib_device *device, struct ib_client *client,
1161 if (WARN_ON(IS_ERR(data)))
1164 rc = xa_store(&device->client_data, client->client_id, data,
1166 WARN_ON(xa_is_err(rc));
1168 EXPORT_SYMBOL(ib_set_client_data);
1171 * ib_register_event_handler - Register an IB event handler
1172 * @event_handler:Handler to register
1174 * ib_register_event_handler() registers an event handler that will be
1175 * called back when asynchronous IB events occur (as defined in
1176 * chapter 11 of the InfiniBand Architecture Specification). This
1177 * callback may occur in interrupt context.
1179 void ib_register_event_handler(struct ib_event_handler *event_handler)
1181 unsigned long flags;
1183 spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
1184 list_add_tail(&event_handler->list,
1185 &event_handler->device->event_handler_list);
1186 spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
1188 EXPORT_SYMBOL(ib_register_event_handler);
1191 * ib_unregister_event_handler - Unregister an event handler
1192 * @event_handler:Handler to unregister
1194 * Unregister an event handler registered with
1195 * ib_register_event_handler().
1197 void ib_unregister_event_handler(struct ib_event_handler *event_handler)
1199 unsigned long flags;
1201 spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
1202 list_del(&event_handler->list);
1203 spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
1205 EXPORT_SYMBOL(ib_unregister_event_handler);
1208 * ib_dispatch_event - Dispatch an asynchronous event
1209 * @event:Event to dispatch
1211 * Low-level drivers must call ib_dispatch_event() to dispatch the
1212 * event to all registered event handlers when an asynchronous event
1215 void ib_dispatch_event(struct ib_event *event)
1217 unsigned long flags;
1218 struct ib_event_handler *handler;
1220 spin_lock_irqsave(&event->device->event_handler_lock, flags);
1222 list_for_each_entry(handler, &event->device->event_handler_list, list)
1223 handler->handler(handler, event);
1225 spin_unlock_irqrestore(&event->device->event_handler_lock, flags);
1227 EXPORT_SYMBOL(ib_dispatch_event);
1230 * ib_query_port - Query IB port attributes
1231 * @device:Device to query
1232 * @port_num:Port number to query
1233 * @port_attr:Port attributes
1235 * ib_query_port() returns the attributes of a port through the
1236 * @port_attr pointer.
1238 int ib_query_port(struct ib_device *device,
1240 struct ib_port_attr *port_attr)
1245 if (!rdma_is_port_valid(device, port_num))
1248 memset(port_attr, 0, sizeof(*port_attr));
1249 err = device->ops.query_port(device, port_num, port_attr);
1250 if (err || port_attr->subnet_prefix)
1253 if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND)
1256 err = device->ops.query_gid(device, port_num, 0, &gid);
1260 port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix);
1263 EXPORT_SYMBOL(ib_query_port);
1265 static void add_ndev_hash(struct ib_port_data *pdata)
1267 unsigned long flags;
1271 spin_lock_irqsave(&ndev_hash_lock, flags);
1272 if (hash_hashed(&pdata->ndev_hash_link)) {
1273 hash_del_rcu(&pdata->ndev_hash_link);
1274 spin_unlock_irqrestore(&ndev_hash_lock, flags);
1276 * We cannot do hash_add_rcu after a hash_del_rcu until the
1280 spin_lock_irqsave(&ndev_hash_lock, flags);
1283 hash_add_rcu(ndev_hash, &pdata->ndev_hash_link,
1284 (uintptr_t)pdata->netdev);
1285 spin_unlock_irqrestore(&ndev_hash_lock, flags);
1289 * ib_device_set_netdev - Associate the ib_dev with an underlying net_device
1290 * @ib_dev: Device to modify
1291 * @ndev: net_device to affiliate, may be NULL
1292 * @port: IB port the net_device is connected to
1294 * Drivers should use this to link the ib_device to a netdev so the netdev
1295 * shows up in interfaces like ib_enum_roce_netdev. Only one netdev may be
1296 * affiliated with any port.
1298 * The caller must ensure that the given ndev is not unregistered or
1299 * unregistering, and that either the ib_device is unregistered or
1300 * ib_device_set_netdev() is called with NULL when the ndev sends a
1301 * NETDEV_UNREGISTER event.
1303 int ib_device_set_netdev(struct ib_device *ib_dev, struct net_device *ndev,
1306 struct net_device *old_ndev;
1307 struct ib_port_data *pdata;
1308 unsigned long flags;
1312 * Drivers wish to call this before ib_register_driver, so we have to
1313 * setup the port data early.
1315 ret = alloc_port_data(ib_dev);
1319 if (!rdma_is_port_valid(ib_dev, port))
1322 pdata = &ib_dev->port_data[port];
1323 spin_lock_irqsave(&pdata->netdev_lock, flags);
1324 old_ndev = rcu_dereference_protected(
1325 pdata->netdev, lockdep_is_held(&pdata->netdev_lock));
1326 if (old_ndev == ndev) {
1327 spin_unlock_irqrestore(&pdata->netdev_lock, flags);
1333 rcu_assign_pointer(pdata->netdev, ndev);
1334 spin_unlock_irqrestore(&pdata->netdev_lock, flags);
1336 add_ndev_hash(pdata);
1342 EXPORT_SYMBOL(ib_device_set_netdev);
1344 static void free_netdevs(struct ib_device *ib_dev)
1346 unsigned long flags;
1349 rdma_for_each_port (ib_dev, port) {
1350 struct ib_port_data *pdata = &ib_dev->port_data[port];
1351 struct net_device *ndev;
1353 spin_lock_irqsave(&pdata->netdev_lock, flags);
1354 ndev = rcu_dereference_protected(
1355 pdata->netdev, lockdep_is_held(&pdata->netdev_lock));
1357 spin_lock(&ndev_hash_lock);
1358 hash_del_rcu(&pdata->ndev_hash_link);
1359 spin_unlock(&ndev_hash_lock);
1362 * If this is the last dev_put there is still a
1363 * synchronize_rcu before the netdev is kfreed, so we
1364 * can continue to rely on unlocked pointer
1365 * comparisons after the put
1367 rcu_assign_pointer(pdata->netdev, NULL);
1370 spin_unlock_irqrestore(&pdata->netdev_lock, flags);
1374 struct net_device *ib_device_get_netdev(struct ib_device *ib_dev,
1377 struct ib_port_data *pdata;
1378 struct net_device *res;
1380 if (!rdma_is_port_valid(ib_dev, port))
1383 pdata = &ib_dev->port_data[port];
1386 * New drivers should use ib_device_set_netdev() not the legacy
1389 if (ib_dev->ops.get_netdev)
1390 res = ib_dev->ops.get_netdev(ib_dev, port);
1392 spin_lock(&pdata->netdev_lock);
1393 res = rcu_dereference_protected(
1394 pdata->netdev, lockdep_is_held(&pdata->netdev_lock));
1397 spin_unlock(&pdata->netdev_lock);
1401 * If we are starting to unregister expedite things by preventing
1402 * propagation of an unregistering netdev.
1404 if (res && res->reg_state != NETREG_REGISTERED) {
1413 * ib_device_get_by_netdev - Find an IB device associated with a netdev
1414 * @ndev: netdev to locate
1415 * @driver_id: The driver ID that must match (RDMA_DRIVER_UNKNOWN matches all)
1417 * Find and hold an ib_device that is associated with a netdev via
1418 * ib_device_set_netdev(). The caller must call ib_device_put() on the
1421 struct ib_device *ib_device_get_by_netdev(struct net_device *ndev,
1422 enum rdma_driver_id driver_id)
1424 struct ib_device *res = NULL;
1425 struct ib_port_data *cur;
1428 hash_for_each_possible_rcu (ndev_hash, cur, ndev_hash_link,
1430 if (rcu_access_pointer(cur->netdev) == ndev &&
1431 (driver_id == RDMA_DRIVER_UNKNOWN ||
1432 cur->ib_dev->driver_id == driver_id) &&
1433 ib_device_try_get(cur->ib_dev)) {
1442 EXPORT_SYMBOL(ib_device_get_by_netdev);
1445 * ib_enum_roce_netdev - enumerate all RoCE ports
1446 * @ib_dev : IB device we want to query
1447 * @filter: Should we call the callback?
1448 * @filter_cookie: Cookie passed to filter
1449 * @cb: Callback to call for each found RoCE ports
1450 * @cookie: Cookie passed back to the callback
1452 * Enumerates all of the physical RoCE ports of ib_dev
1453 * which are related to netdevice and calls callback() on each
1454 * device for which filter() function returns non zero.
1456 void ib_enum_roce_netdev(struct ib_device *ib_dev,
1457 roce_netdev_filter filter,
1458 void *filter_cookie,
1459 roce_netdev_callback cb,
1464 rdma_for_each_port (ib_dev, port)
1465 if (rdma_protocol_roce(ib_dev, port)) {
1466 struct net_device *idev =
1467 ib_device_get_netdev(ib_dev, port);
1469 if (filter(ib_dev, port, idev, filter_cookie))
1470 cb(ib_dev, port, idev, cookie);
1478 * ib_enum_all_roce_netdevs - enumerate all RoCE devices
1479 * @filter: Should we call the callback?
1480 * @filter_cookie: Cookie passed to filter
1481 * @cb: Callback to call for each found RoCE ports
1482 * @cookie: Cookie passed back to the callback
1484 * Enumerates all RoCE devices' physical ports which are related
1485 * to netdevices and calls callback() on each device for which
1486 * filter() function returns non zero.
1488 void ib_enum_all_roce_netdevs(roce_netdev_filter filter,
1489 void *filter_cookie,
1490 roce_netdev_callback cb,
1493 struct ib_device *dev;
1494 unsigned long index;
1496 down_read(&devices_rwsem);
1497 xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED)
1498 ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie);
1499 up_read(&devices_rwsem);
1503 * ib_enum_all_devs - enumerate all ib_devices
1504 * @cb: Callback to call for each found ib_device
1506 * Enumerates all ib_devices and calls callback() on each device.
1508 int ib_enum_all_devs(nldev_callback nldev_cb, struct sk_buff *skb,
1509 struct netlink_callback *cb)
1511 unsigned long index;
1512 struct ib_device *dev;
1513 unsigned int idx = 0;
1516 down_read(&devices_rwsem);
1517 xa_for_each_marked (&devices, index, dev, DEVICE_REGISTERED) {
1518 ret = nldev_cb(dev, skb, cb, idx);
1523 up_read(&devices_rwsem);
1528 * ib_query_pkey - Get P_Key table entry
1529 * @device:Device to query
1530 * @port_num:Port number to query
1531 * @index:P_Key table index to query
1532 * @pkey:Returned P_Key
1534 * ib_query_pkey() fetches the specified P_Key table entry.
1536 int ib_query_pkey(struct ib_device *device,
1537 u8 port_num, u16 index, u16 *pkey)
1539 if (!rdma_is_port_valid(device, port_num))
1542 return device->ops.query_pkey(device, port_num, index, pkey);
1544 EXPORT_SYMBOL(ib_query_pkey);
1547 * ib_modify_device - Change IB device attributes
1548 * @device:Device to modify
1549 * @device_modify_mask:Mask of attributes to change
1550 * @device_modify:New attribute values
1552 * ib_modify_device() changes a device's attributes as specified by
1553 * the @device_modify_mask and @device_modify structure.
1555 int ib_modify_device(struct ib_device *device,
1556 int device_modify_mask,
1557 struct ib_device_modify *device_modify)
1559 if (!device->ops.modify_device)
1562 return device->ops.modify_device(device, device_modify_mask,
1565 EXPORT_SYMBOL(ib_modify_device);
1568 * ib_modify_port - Modifies the attributes for the specified port.
1569 * @device: The device to modify.
1570 * @port_num: The number of the port to modify.
1571 * @port_modify_mask: Mask used to specify which attributes of the port
1573 * @port_modify: New attribute values for the port.
1575 * ib_modify_port() changes a port's attributes as specified by the
1576 * @port_modify_mask and @port_modify structure.
1578 int ib_modify_port(struct ib_device *device,
1579 u8 port_num, int port_modify_mask,
1580 struct ib_port_modify *port_modify)
1584 if (!rdma_is_port_valid(device, port_num))
1587 if (device->ops.modify_port)
1588 rc = device->ops.modify_port(device, port_num,
1592 rc = rdma_protocol_roce(device, port_num) ? 0 : -ENOSYS;
1595 EXPORT_SYMBOL(ib_modify_port);
1598 * ib_find_gid - Returns the port number and GID table index where
1599 * a specified GID value occurs. Its searches only for IB link layer.
1600 * @device: The device to query.
1601 * @gid: The GID value to search for.
1602 * @port_num: The port number of the device where the GID value was found.
1603 * @index: The index into the GID table where the GID was found. This
1604 * parameter may be NULL.
1606 int ib_find_gid(struct ib_device *device, union ib_gid *gid,
1607 u8 *port_num, u16 *index)
1609 union ib_gid tmp_gid;
1613 rdma_for_each_port (device, port) {
1614 if (!rdma_protocol_ib(device, port))
1617 for (i = 0; i < device->port_data[port].immutable.gid_tbl_len;
1619 ret = rdma_query_gid(device, port, i, &tmp_gid);
1622 if (!memcmp(&tmp_gid, gid, sizeof *gid)) {
1633 EXPORT_SYMBOL(ib_find_gid);
1636 * ib_find_pkey - Returns the PKey table index where a specified
1637 * PKey value occurs.
1638 * @device: The device to query.
1639 * @port_num: The port number of the device to search for the PKey.
1640 * @pkey: The PKey value to search for.
1641 * @index: The index into the PKey table where the PKey was found.
1643 int ib_find_pkey(struct ib_device *device,
1644 u8 port_num, u16 pkey, u16 *index)
1648 int partial_ix = -1;
1650 for (i = 0; i < device->port_data[port_num].immutable.pkey_tbl_len;
1652 ret = ib_query_pkey(device, port_num, i, &tmp_pkey);
1655 if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) {
1656 /* if there is full-member pkey take it.*/
1657 if (tmp_pkey & 0x8000) {
1666 /*no full-member, if exists take the limited*/
1667 if (partial_ix >= 0) {
1668 *index = partial_ix;
1673 EXPORT_SYMBOL(ib_find_pkey);
1676 * ib_get_net_dev_by_params() - Return the appropriate net_dev
1677 * for a received CM request
1678 * @dev: An RDMA device on which the request has been received.
1679 * @port: Port number on the RDMA device.
1680 * @pkey: The Pkey the request came on.
1681 * @gid: A GID that the net_dev uses to communicate.
1682 * @addr: Contains the IP address that the request specified as its
1686 struct net_device *ib_get_net_dev_by_params(struct ib_device *dev,
1689 const union ib_gid *gid,
1690 const struct sockaddr *addr)
1692 struct net_device *net_dev = NULL;
1693 unsigned long index;
1696 if (!rdma_protocol_ib(dev, port))
1700 * Holding the read side guarantees that the client will not become
1701 * unregistered while we are calling get_net_dev_by_params()
1703 down_read(&dev->client_data_rwsem);
1704 xan_for_each_marked (&dev->client_data, index, client_data,
1705 CLIENT_DATA_REGISTERED) {
1706 struct ib_client *client = xa_load(&clients, index);
1708 if (!client || !client->get_net_dev_by_params)
1711 net_dev = client->get_net_dev_by_params(dev, port, pkey, gid,
1716 up_read(&dev->client_data_rwsem);
1720 EXPORT_SYMBOL(ib_get_net_dev_by_params);
1722 void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
1724 struct ib_device_ops *dev_ops = &dev->ops;
1725 #define SET_DEVICE_OP(ptr, name) \
1728 if (!((ptr)->name)) \
1729 (ptr)->name = ops->name; \
1732 #define SET_OBJ_SIZE(ptr, name) SET_DEVICE_OP(ptr, size_##name)
1734 SET_DEVICE_OP(dev_ops, add_gid);
1735 SET_DEVICE_OP(dev_ops, advise_mr);
1736 SET_DEVICE_OP(dev_ops, alloc_dm);
1737 SET_DEVICE_OP(dev_ops, alloc_fmr);
1738 SET_DEVICE_OP(dev_ops, alloc_hw_stats);
1739 SET_DEVICE_OP(dev_ops, alloc_mr);
1740 SET_DEVICE_OP(dev_ops, alloc_mw);
1741 SET_DEVICE_OP(dev_ops, alloc_pd);
1742 SET_DEVICE_OP(dev_ops, alloc_rdma_netdev);
1743 SET_DEVICE_OP(dev_ops, alloc_ucontext);
1744 SET_DEVICE_OP(dev_ops, alloc_xrcd);
1745 SET_DEVICE_OP(dev_ops, attach_mcast);
1746 SET_DEVICE_OP(dev_ops, check_mr_status);
1747 SET_DEVICE_OP(dev_ops, create_ah);
1748 SET_DEVICE_OP(dev_ops, create_counters);
1749 SET_DEVICE_OP(dev_ops, create_cq);
1750 SET_DEVICE_OP(dev_ops, create_flow);
1751 SET_DEVICE_OP(dev_ops, create_flow_action_esp);
1752 SET_DEVICE_OP(dev_ops, create_qp);
1753 SET_DEVICE_OP(dev_ops, create_rwq_ind_table);
1754 SET_DEVICE_OP(dev_ops, create_srq);
1755 SET_DEVICE_OP(dev_ops, create_wq);
1756 SET_DEVICE_OP(dev_ops, dealloc_dm);
1757 SET_DEVICE_OP(dev_ops, dealloc_driver);
1758 SET_DEVICE_OP(dev_ops, dealloc_fmr);
1759 SET_DEVICE_OP(dev_ops, dealloc_mw);
1760 SET_DEVICE_OP(dev_ops, dealloc_pd);
1761 SET_DEVICE_OP(dev_ops, dealloc_ucontext);
1762 SET_DEVICE_OP(dev_ops, dealloc_xrcd);
1763 SET_DEVICE_OP(dev_ops, del_gid);
1764 SET_DEVICE_OP(dev_ops, dereg_mr);
1765 SET_DEVICE_OP(dev_ops, destroy_ah);
1766 SET_DEVICE_OP(dev_ops, destroy_counters);
1767 SET_DEVICE_OP(dev_ops, destroy_cq);
1768 SET_DEVICE_OP(dev_ops, destroy_flow);
1769 SET_DEVICE_OP(dev_ops, destroy_flow_action);
1770 SET_DEVICE_OP(dev_ops, destroy_qp);
1771 SET_DEVICE_OP(dev_ops, destroy_rwq_ind_table);
1772 SET_DEVICE_OP(dev_ops, destroy_srq);
1773 SET_DEVICE_OP(dev_ops, destroy_wq);
1774 SET_DEVICE_OP(dev_ops, detach_mcast);
1775 SET_DEVICE_OP(dev_ops, disassociate_ucontext);
1776 SET_DEVICE_OP(dev_ops, drain_rq);
1777 SET_DEVICE_OP(dev_ops, drain_sq);
1778 SET_DEVICE_OP(dev_ops, enable_driver);
1779 SET_DEVICE_OP(dev_ops, fill_res_entry);
1780 SET_DEVICE_OP(dev_ops, get_dev_fw_str);
1781 SET_DEVICE_OP(dev_ops, get_dma_mr);
1782 SET_DEVICE_OP(dev_ops, get_hw_stats);
1783 SET_DEVICE_OP(dev_ops, get_link_layer);
1784 SET_DEVICE_OP(dev_ops, get_netdev);
1785 SET_DEVICE_OP(dev_ops, get_port_immutable);
1786 SET_DEVICE_OP(dev_ops, get_vector_affinity);
1787 SET_DEVICE_OP(dev_ops, get_vf_config);
1788 SET_DEVICE_OP(dev_ops, get_vf_stats);
1789 SET_DEVICE_OP(dev_ops, init_port);
1790 SET_DEVICE_OP(dev_ops, map_mr_sg);
1791 SET_DEVICE_OP(dev_ops, map_phys_fmr);
1792 SET_DEVICE_OP(dev_ops, mmap);
1793 SET_DEVICE_OP(dev_ops, modify_ah);
1794 SET_DEVICE_OP(dev_ops, modify_cq);
1795 SET_DEVICE_OP(dev_ops, modify_device);
1796 SET_DEVICE_OP(dev_ops, modify_flow_action_esp);
1797 SET_DEVICE_OP(dev_ops, modify_port);
1798 SET_DEVICE_OP(dev_ops, modify_qp);
1799 SET_DEVICE_OP(dev_ops, modify_srq);
1800 SET_DEVICE_OP(dev_ops, modify_wq);
1801 SET_DEVICE_OP(dev_ops, peek_cq);
1802 SET_DEVICE_OP(dev_ops, poll_cq);
1803 SET_DEVICE_OP(dev_ops, post_recv);
1804 SET_DEVICE_OP(dev_ops, post_send);
1805 SET_DEVICE_OP(dev_ops, post_srq_recv);
1806 SET_DEVICE_OP(dev_ops, process_mad);
1807 SET_DEVICE_OP(dev_ops, query_ah);
1808 SET_DEVICE_OP(dev_ops, query_device);
1809 SET_DEVICE_OP(dev_ops, query_gid);
1810 SET_DEVICE_OP(dev_ops, query_pkey);
1811 SET_DEVICE_OP(dev_ops, query_port);
1812 SET_DEVICE_OP(dev_ops, query_qp);
1813 SET_DEVICE_OP(dev_ops, query_srq);
1814 SET_DEVICE_OP(dev_ops, rdma_netdev_get_params);
1815 SET_DEVICE_OP(dev_ops, read_counters);
1816 SET_DEVICE_OP(dev_ops, reg_dm_mr);
1817 SET_DEVICE_OP(dev_ops, reg_user_mr);
1818 SET_DEVICE_OP(dev_ops, req_ncomp_notif);
1819 SET_DEVICE_OP(dev_ops, req_notify_cq);
1820 SET_DEVICE_OP(dev_ops, rereg_user_mr);
1821 SET_DEVICE_OP(dev_ops, resize_cq);
1822 SET_DEVICE_OP(dev_ops, set_vf_guid);
1823 SET_DEVICE_OP(dev_ops, set_vf_link_state);
1824 SET_DEVICE_OP(dev_ops, unmap_fmr);
1826 SET_OBJ_SIZE(dev_ops, ib_pd);
1827 SET_OBJ_SIZE(dev_ops, ib_ucontext);
1829 EXPORT_SYMBOL(ib_set_device_ops);
1831 static const struct rdma_nl_cbs ibnl_ls_cb_table[RDMA_NL_LS_NUM_OPS] = {
1832 [RDMA_NL_LS_OP_RESOLVE] = {
1833 .doit = ib_nl_handle_resolve_resp,
1834 .flags = RDMA_NL_ADMIN_PERM,
1836 [RDMA_NL_LS_OP_SET_TIMEOUT] = {
1837 .doit = ib_nl_handle_set_timeout,
1838 .flags = RDMA_NL_ADMIN_PERM,
1840 [RDMA_NL_LS_OP_IP_RESOLVE] = {
1841 .doit = ib_nl_handle_ip_res_resp,
1842 .flags = RDMA_NL_ADMIN_PERM,
1846 static int __init ib_core_init(void)
1850 ib_wq = alloc_workqueue("infiniband", 0, 0);
1854 ib_comp_wq = alloc_workqueue("ib-comp-wq",
1855 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, 0);
1861 ib_comp_unbound_wq =
1862 alloc_workqueue("ib-comp-unb-wq",
1863 WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM |
1864 WQ_SYSFS, WQ_UNBOUND_MAX_ACTIVE);
1865 if (!ib_comp_unbound_wq) {
1870 ret = class_register(&ib_class);
1872 pr_warn("Couldn't create InfiniBand device class\n");
1873 goto err_comp_unbound;
1876 ret = rdma_nl_init();
1878 pr_warn("Couldn't init IB netlink interface: err %d\n", ret);
1884 pr_warn("Could't init IB address resolution\n");
1888 ret = ib_mad_init();
1890 pr_warn("Couldn't init IB MAD\n");
1896 pr_warn("Couldn't init SA\n");
1900 ret = register_lsm_notifier(&ibdev_lsm_nb);
1902 pr_warn("Couldn't register LSM notifier. ret %d\n", ret);
1907 rdma_nl_register(RDMA_NL_LS, ibnl_ls_cb_table);
1908 roce_gid_mgmt_init();
1921 class_unregister(&ib_class);
1923 destroy_workqueue(ib_comp_unbound_wq);
1925 destroy_workqueue(ib_comp_wq);
1927 destroy_workqueue(ib_wq);
1931 static void __exit ib_core_cleanup(void)
1933 roce_gid_mgmt_cleanup();
1935 rdma_nl_unregister(RDMA_NL_LS);
1936 unregister_lsm_notifier(&ibdev_lsm_nb);
1941 class_unregister(&ib_class);
1942 destroy_workqueue(ib_comp_unbound_wq);
1943 destroy_workqueue(ib_comp_wq);
1944 /* Make sure that any pending umem accounting work is done. */
1945 destroy_workqueue(ib_wq);
1946 flush_workqueue(system_unbound_wq);
1947 WARN_ON(!xa_empty(&clients));
1948 WARN_ON(!xa_empty(&devices));
1951 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS, 4);
1953 subsys_initcall(ib_core_init);
1954 module_exit(ib_core_cleanup);