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/mutex.h>
41 #include <linux/netdevice.h>
42 #include <rdma/rdma_netlink.h>
43 #include <rdma/ib_addr.h>
44 #include <rdma/ib_cache.h>
46 #include "core_priv.h"
48 MODULE_AUTHOR("Roland Dreier");
49 MODULE_DESCRIPTION("core kernel InfiniBand API");
50 MODULE_LICENSE("Dual BSD/GPL");
52 struct ib_client_data {
53 struct list_head list;
54 struct ib_client *client;
56 /* The device or client is going down. Do not call client or device
57 * callbacks other than remove(). */
61 struct workqueue_struct *ib_wq;
62 EXPORT_SYMBOL_GPL(ib_wq);
64 /* The device_list and client_list contain devices and clients after their
65 * registration has completed, and the devices and clients are removed
66 * during unregistration. */
67 static LIST_HEAD(device_list);
68 static LIST_HEAD(client_list);
71 * device_mutex and lists_rwsem protect access to both device_list and
72 * client_list. device_mutex protects writer access by device and client
73 * registration / de-registration. lists_rwsem protects reader access to
74 * these lists. Iterators of these lists must lock it for read, while updates
75 * to the lists must be done with a write lock. A special case is when the
76 * device_mutex is locked. In this case locking the lists for read access is
77 * not necessary as the device_mutex implies it.
79 * lists_rwsem also protects access to the client data list.
81 static DEFINE_MUTEX(device_mutex);
82 static DECLARE_RWSEM(lists_rwsem);
85 static int ib_device_check_mandatory(struct ib_device *device)
87 #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x }
91 } mandatory_table[] = {
92 IB_MANDATORY_FUNC(query_device),
93 IB_MANDATORY_FUNC(query_port),
94 IB_MANDATORY_FUNC(query_pkey),
95 IB_MANDATORY_FUNC(query_gid),
96 IB_MANDATORY_FUNC(alloc_pd),
97 IB_MANDATORY_FUNC(dealloc_pd),
98 IB_MANDATORY_FUNC(create_ah),
99 IB_MANDATORY_FUNC(destroy_ah),
100 IB_MANDATORY_FUNC(create_qp),
101 IB_MANDATORY_FUNC(modify_qp),
102 IB_MANDATORY_FUNC(destroy_qp),
103 IB_MANDATORY_FUNC(post_send),
104 IB_MANDATORY_FUNC(post_recv),
105 IB_MANDATORY_FUNC(create_cq),
106 IB_MANDATORY_FUNC(destroy_cq),
107 IB_MANDATORY_FUNC(poll_cq),
108 IB_MANDATORY_FUNC(req_notify_cq),
109 IB_MANDATORY_FUNC(get_dma_mr),
110 IB_MANDATORY_FUNC(dereg_mr),
111 IB_MANDATORY_FUNC(get_port_immutable)
115 for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) {
116 if (!*(void **) ((void *) device + mandatory_table[i].offset)) {
117 printk(KERN_WARNING "Device %s is missing mandatory function %s\n",
118 device->name, mandatory_table[i].name);
126 static struct ib_device *__ib_device_get_by_name(const char *name)
128 struct ib_device *device;
130 list_for_each_entry(device, &device_list, core_list)
131 if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX))
138 static int alloc_name(char *name)
140 unsigned long *inuse;
141 char buf[IB_DEVICE_NAME_MAX];
142 struct ib_device *device;
145 inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL);
149 list_for_each_entry(device, &device_list, core_list) {
150 if (!sscanf(device->name, name, &i))
152 if (i < 0 || i >= PAGE_SIZE * 8)
154 snprintf(buf, sizeof buf, name, i);
155 if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX))
159 i = find_first_zero_bit(inuse, PAGE_SIZE * 8);
160 free_page((unsigned long) inuse);
161 snprintf(buf, sizeof buf, name, i);
163 if (__ib_device_get_by_name(buf))
166 strlcpy(name, buf, IB_DEVICE_NAME_MAX);
170 static void ib_device_release(struct device *device)
172 struct ib_device *dev = container_of(device, struct ib_device, dev);
174 ib_cache_release_one(dev);
175 kfree(dev->port_immutable);
179 static int ib_device_uevent(struct device *device,
180 struct kobj_uevent_env *env)
182 struct ib_device *dev = container_of(device, struct ib_device, dev);
184 if (add_uevent_var(env, "NAME=%s", dev->name))
188 * It would be nice to pass the node GUID with the event...
194 static struct class ib_class = {
195 .name = "infiniband",
196 .dev_release = ib_device_release,
197 .dev_uevent = ib_device_uevent,
201 * ib_alloc_device - allocate an IB device struct
202 * @size:size of structure to allocate
204 * Low-level drivers should use ib_alloc_device() to allocate &struct
205 * ib_device. @size is the size of the structure to be allocated,
206 * including any private data used by the low-level driver.
207 * ib_dealloc_device() must be used to free structures allocated with
210 struct ib_device *ib_alloc_device(size_t size)
212 struct ib_device *device;
214 if (WARN_ON(size < sizeof(struct ib_device)))
217 device = kzalloc(size, GFP_KERNEL);
221 device->dev.class = &ib_class;
222 device_initialize(&device->dev);
224 dev_set_drvdata(&device->dev, device);
226 INIT_LIST_HEAD(&device->event_handler_list);
227 spin_lock_init(&device->event_handler_lock);
228 spin_lock_init(&device->client_data_lock);
229 INIT_LIST_HEAD(&device->client_data_list);
230 INIT_LIST_HEAD(&device->port_list);
234 EXPORT_SYMBOL(ib_alloc_device);
237 * ib_dealloc_device - free an IB device struct
238 * @device:structure to free
240 * Free a structure allocated with ib_alloc_device().
242 void ib_dealloc_device(struct ib_device *device)
244 WARN_ON(device->reg_state != IB_DEV_UNREGISTERED &&
245 device->reg_state != IB_DEV_UNINITIALIZED);
246 kobject_put(&device->dev.kobj);
248 EXPORT_SYMBOL(ib_dealloc_device);
250 static int add_client_context(struct ib_device *device, struct ib_client *client)
252 struct ib_client_data *context;
255 context = kmalloc(sizeof *context, GFP_KERNEL);
257 printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n",
258 device->name, client->name);
262 context->client = client;
263 context->data = NULL;
264 context->going_down = false;
266 down_write(&lists_rwsem);
267 spin_lock_irqsave(&device->client_data_lock, flags);
268 list_add(&context->list, &device->client_data_list);
269 spin_unlock_irqrestore(&device->client_data_lock, flags);
270 up_write(&lists_rwsem);
275 static int verify_immutable(const struct ib_device *dev, u8 port)
277 return WARN_ON(!rdma_cap_ib_mad(dev, port) &&
278 rdma_max_mad_size(dev, port) != 0);
281 static int read_port_immutable(struct ib_device *device)
284 u8 start_port = rdma_start_port(device);
285 u8 end_port = rdma_end_port(device);
289 * device->port_immutable is indexed directly by the port number to make
290 * access to this data as efficient as possible.
292 * Therefore port_immutable is declared as a 1 based array with
293 * potential empty slots at the beginning.
295 device->port_immutable = kzalloc(sizeof(*device->port_immutable)
298 if (!device->port_immutable)
301 for (port = start_port; port <= end_port; ++port) {
302 ret = device->get_port_immutable(device, port,
303 &device->port_immutable[port]);
307 if (verify_immutable(device, port))
314 * ib_register_device - Register an IB device with IB core
315 * @device:Device to register
317 * Low-level drivers use ib_register_device() to register their
318 * devices with the IB core. All registered clients will receive a
319 * callback for each device that is added. @device must be allocated
320 * with ib_alloc_device().
322 int ib_register_device(struct ib_device *device,
323 int (*port_callback)(struct ib_device *,
324 u8, struct kobject *))
327 struct ib_client *client;
328 struct ib_udata uhw = {.outlen = 0, .inlen = 0};
330 mutex_lock(&device_mutex);
332 if (strchr(device->name, '%')) {
333 ret = alloc_name(device->name);
338 if (ib_device_check_mandatory(device)) {
343 ret = read_port_immutable(device);
345 printk(KERN_WARNING "Couldn't create per port immutable data %s\n",
350 ret = ib_cache_setup_one(device);
352 printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n");
356 memset(&device->attrs, 0, sizeof(device->attrs));
357 ret = device->query_device(device, &device->attrs, &uhw);
359 printk(KERN_WARNING "Couldn't query the device attributes\n");
363 ret = ib_device_register_sysfs(device, port_callback);
365 printk(KERN_WARNING "Couldn't register device %s with driver model\n",
367 ib_cache_cleanup_one(device);
371 device->reg_state = IB_DEV_REGISTERED;
373 list_for_each_entry(client, &client_list, list)
374 if (client->add && !add_client_context(device, client))
377 down_write(&lists_rwsem);
378 list_add_tail(&device->core_list, &device_list);
379 up_write(&lists_rwsem);
381 mutex_unlock(&device_mutex);
384 EXPORT_SYMBOL(ib_register_device);
387 * ib_unregister_device - Unregister an IB device
388 * @device:Device to unregister
390 * Unregister an IB device. All clients will receive a remove callback.
392 void ib_unregister_device(struct ib_device *device)
394 struct ib_client_data *context, *tmp;
397 mutex_lock(&device_mutex);
399 down_write(&lists_rwsem);
400 list_del(&device->core_list);
401 spin_lock_irqsave(&device->client_data_lock, flags);
402 list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
403 context->going_down = true;
404 spin_unlock_irqrestore(&device->client_data_lock, flags);
405 downgrade_write(&lists_rwsem);
407 list_for_each_entry_safe(context, tmp, &device->client_data_list,
409 if (context->client->remove)
410 context->client->remove(device, context->data);
412 up_read(&lists_rwsem);
414 mutex_unlock(&device_mutex);
416 ib_device_unregister_sysfs(device);
417 ib_cache_cleanup_one(device);
419 down_write(&lists_rwsem);
420 spin_lock_irqsave(&device->client_data_lock, flags);
421 list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
423 spin_unlock_irqrestore(&device->client_data_lock, flags);
424 up_write(&lists_rwsem);
426 device->reg_state = IB_DEV_UNREGISTERED;
428 EXPORT_SYMBOL(ib_unregister_device);
431 * ib_register_client - Register an IB client
432 * @client:Client to register
434 * Upper level users of the IB drivers can use ib_register_client() to
435 * register callbacks for IB device addition and removal. When an IB
436 * device is added, each registered client's add method will be called
437 * (in the order the clients were registered), and when a device is
438 * removed, each client's remove method will be called (in the reverse
439 * order that clients were registered). In addition, when
440 * ib_register_client() is called, the client will receive an add
441 * callback for all devices already registered.
443 int ib_register_client(struct ib_client *client)
445 struct ib_device *device;
447 mutex_lock(&device_mutex);
449 list_for_each_entry(device, &device_list, core_list)
450 if (client->add && !add_client_context(device, client))
453 down_write(&lists_rwsem);
454 list_add_tail(&client->list, &client_list);
455 up_write(&lists_rwsem);
457 mutex_unlock(&device_mutex);
461 EXPORT_SYMBOL(ib_register_client);
464 * ib_unregister_client - Unregister an IB client
465 * @client:Client to unregister
467 * Upper level users use ib_unregister_client() to remove their client
468 * registration. When ib_unregister_client() is called, the client
469 * will receive a remove callback for each IB device still registered.
471 void ib_unregister_client(struct ib_client *client)
473 struct ib_client_data *context, *tmp;
474 struct ib_device *device;
477 mutex_lock(&device_mutex);
479 down_write(&lists_rwsem);
480 list_del(&client->list);
481 up_write(&lists_rwsem);
483 list_for_each_entry(device, &device_list, core_list) {
484 struct ib_client_data *found_context = NULL;
486 down_write(&lists_rwsem);
487 spin_lock_irqsave(&device->client_data_lock, flags);
488 list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
489 if (context->client == client) {
490 context->going_down = true;
491 found_context = context;
494 spin_unlock_irqrestore(&device->client_data_lock, flags);
495 up_write(&lists_rwsem);
498 client->remove(device, found_context ?
499 found_context->data : NULL);
501 if (!found_context) {
502 pr_warn("No client context found for %s/%s\n",
503 device->name, client->name);
507 down_write(&lists_rwsem);
508 spin_lock_irqsave(&device->client_data_lock, flags);
509 list_del(&found_context->list);
510 kfree(found_context);
511 spin_unlock_irqrestore(&device->client_data_lock, flags);
512 up_write(&lists_rwsem);
515 mutex_unlock(&device_mutex);
517 EXPORT_SYMBOL(ib_unregister_client);
520 * ib_get_client_data - Get IB client context
521 * @device:Device to get context for
522 * @client:Client to get context for
524 * ib_get_client_data() returns client context set with
525 * ib_set_client_data().
527 void *ib_get_client_data(struct ib_device *device, struct ib_client *client)
529 struct ib_client_data *context;
533 spin_lock_irqsave(&device->client_data_lock, flags);
534 list_for_each_entry(context, &device->client_data_list, list)
535 if (context->client == client) {
539 spin_unlock_irqrestore(&device->client_data_lock, flags);
543 EXPORT_SYMBOL(ib_get_client_data);
546 * ib_set_client_data - Set IB client context
547 * @device:Device to set context for
548 * @client:Client to set context for
549 * @data:Context to set
551 * ib_set_client_data() sets client context that can be retrieved with
552 * ib_get_client_data().
554 void ib_set_client_data(struct ib_device *device, struct ib_client *client,
557 struct ib_client_data *context;
560 spin_lock_irqsave(&device->client_data_lock, flags);
561 list_for_each_entry(context, &device->client_data_list, list)
562 if (context->client == client) {
563 context->data = data;
567 printk(KERN_WARNING "No client context found for %s/%s\n",
568 device->name, client->name);
571 spin_unlock_irqrestore(&device->client_data_lock, flags);
573 EXPORT_SYMBOL(ib_set_client_data);
576 * ib_register_event_handler - Register an IB event handler
577 * @event_handler:Handler to register
579 * ib_register_event_handler() registers an event handler that will be
580 * called back when asynchronous IB events occur (as defined in
581 * chapter 11 of the InfiniBand Architecture Specification). This
582 * callback may occur in interrupt context.
584 int ib_register_event_handler (struct ib_event_handler *event_handler)
588 spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
589 list_add_tail(&event_handler->list,
590 &event_handler->device->event_handler_list);
591 spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
595 EXPORT_SYMBOL(ib_register_event_handler);
598 * ib_unregister_event_handler - Unregister an event handler
599 * @event_handler:Handler to unregister
601 * Unregister an event handler registered with
602 * ib_register_event_handler().
604 int ib_unregister_event_handler(struct ib_event_handler *event_handler)
608 spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
609 list_del(&event_handler->list);
610 spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
614 EXPORT_SYMBOL(ib_unregister_event_handler);
617 * ib_dispatch_event - Dispatch an asynchronous event
618 * @event:Event to dispatch
620 * Low-level drivers must call ib_dispatch_event() to dispatch the
621 * event to all registered event handlers when an asynchronous event
624 void ib_dispatch_event(struct ib_event *event)
627 struct ib_event_handler *handler;
629 spin_lock_irqsave(&event->device->event_handler_lock, flags);
631 list_for_each_entry(handler, &event->device->event_handler_list, list)
632 handler->handler(handler, event);
634 spin_unlock_irqrestore(&event->device->event_handler_lock, flags);
636 EXPORT_SYMBOL(ib_dispatch_event);
639 * ib_query_port - Query IB port attributes
640 * @device:Device to query
641 * @port_num:Port number to query
642 * @port_attr:Port attributes
644 * ib_query_port() returns the attributes of a port through the
645 * @port_attr pointer.
647 int ib_query_port(struct ib_device *device,
649 struct ib_port_attr *port_attr)
651 if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
654 return device->query_port(device, port_num, port_attr);
656 EXPORT_SYMBOL(ib_query_port);
659 * ib_query_gid - Get GID table entry
660 * @device:Device to query
661 * @port_num:Port number to query
662 * @index:GID table index to query
664 * @attr: Returned GID attributes related to this GID index (only in RoCE).
667 * ib_query_gid() fetches the specified GID table entry.
669 int ib_query_gid(struct ib_device *device,
670 u8 port_num, int index, union ib_gid *gid,
671 struct ib_gid_attr *attr)
673 if (rdma_cap_roce_gid_table(device, port_num))
674 return ib_get_cached_gid(device, port_num, index, gid, attr);
679 return device->query_gid(device, port_num, index, gid);
681 EXPORT_SYMBOL(ib_query_gid);
684 * ib_enum_roce_netdev - enumerate all RoCE ports
685 * @ib_dev : IB device we want to query
686 * @filter: Should we call the callback?
687 * @filter_cookie: Cookie passed to filter
688 * @cb: Callback to call for each found RoCE ports
689 * @cookie: Cookie passed back to the callback
691 * Enumerates all of the physical RoCE ports of ib_dev
692 * which are related to netdevice and calls callback() on each
693 * device for which filter() function returns non zero.
695 void ib_enum_roce_netdev(struct ib_device *ib_dev,
696 roce_netdev_filter filter,
698 roce_netdev_callback cb,
703 for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev);
705 if (rdma_protocol_roce(ib_dev, port)) {
706 struct net_device *idev = NULL;
708 if (ib_dev->get_netdev)
709 idev = ib_dev->get_netdev(ib_dev, port);
712 idev->reg_state >= NETREG_UNREGISTERED) {
717 if (filter(ib_dev, port, idev, filter_cookie))
718 cb(ib_dev, port, idev, cookie);
726 * ib_enum_all_roce_netdevs - enumerate all RoCE devices
727 * @filter: Should we call the callback?
728 * @filter_cookie: Cookie passed to filter
729 * @cb: Callback to call for each found RoCE ports
730 * @cookie: Cookie passed back to the callback
732 * Enumerates all RoCE devices' physical ports which are related
733 * to netdevices and calls callback() on each device for which
734 * filter() function returns non zero.
736 void ib_enum_all_roce_netdevs(roce_netdev_filter filter,
738 roce_netdev_callback cb,
741 struct ib_device *dev;
743 down_read(&lists_rwsem);
744 list_for_each_entry(dev, &device_list, core_list)
745 ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie);
746 up_read(&lists_rwsem);
750 * ib_query_pkey - Get P_Key table entry
751 * @device:Device to query
752 * @port_num:Port number to query
753 * @index:P_Key table index to query
754 * @pkey:Returned P_Key
756 * ib_query_pkey() fetches the specified P_Key table entry.
758 int ib_query_pkey(struct ib_device *device,
759 u8 port_num, u16 index, u16 *pkey)
761 return device->query_pkey(device, port_num, index, pkey);
763 EXPORT_SYMBOL(ib_query_pkey);
766 * ib_modify_device - Change IB device attributes
767 * @device:Device to modify
768 * @device_modify_mask:Mask of attributes to change
769 * @device_modify:New attribute values
771 * ib_modify_device() changes a device's attributes as specified by
772 * the @device_modify_mask and @device_modify structure.
774 int ib_modify_device(struct ib_device *device,
775 int device_modify_mask,
776 struct ib_device_modify *device_modify)
778 if (!device->modify_device)
781 return device->modify_device(device, device_modify_mask,
784 EXPORT_SYMBOL(ib_modify_device);
787 * ib_modify_port - Modifies the attributes for the specified port.
788 * @device: The device to modify.
789 * @port_num: The number of the port to modify.
790 * @port_modify_mask: Mask used to specify which attributes of the port
792 * @port_modify: New attribute values for the port.
794 * ib_modify_port() changes a port's attributes as specified by the
795 * @port_modify_mask and @port_modify structure.
797 int ib_modify_port(struct ib_device *device,
798 u8 port_num, int port_modify_mask,
799 struct ib_port_modify *port_modify)
801 if (!device->modify_port)
804 if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
807 return device->modify_port(device, port_num, port_modify_mask,
810 EXPORT_SYMBOL(ib_modify_port);
813 * ib_find_gid - Returns the port number and GID table index where
814 * a specified GID value occurs.
815 * @device: The device to query.
816 * @gid: The GID value to search for.
817 * @ndev: The ndev related to the GID to search for.
818 * @port_num: The port number of the device where the GID value was found.
819 * @index: The index into the GID table where the GID was found. This
820 * parameter may be NULL.
822 int ib_find_gid(struct ib_device *device, union ib_gid *gid,
823 struct net_device *ndev, u8 *port_num, u16 *index)
825 union ib_gid tmp_gid;
828 for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) {
829 if (rdma_cap_roce_gid_table(device, port)) {
830 if (!ib_find_cached_gid_by_port(device, gid, port,
837 for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) {
838 ret = ib_query_gid(device, port, i, &tmp_gid, NULL);
841 if (!memcmp(&tmp_gid, gid, sizeof *gid)) {
852 EXPORT_SYMBOL(ib_find_gid);
855 * ib_find_pkey - Returns the PKey table index where a specified
857 * @device: The device to query.
858 * @port_num: The port number of the device to search for the PKey.
859 * @pkey: The PKey value to search for.
860 * @index: The index into the PKey table where the PKey was found.
862 int ib_find_pkey(struct ib_device *device,
863 u8 port_num, u16 pkey, u16 *index)
869 for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) {
870 ret = ib_query_pkey(device, port_num, i, &tmp_pkey);
873 if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) {
874 /* if there is full-member pkey take it.*/
875 if (tmp_pkey & 0x8000) {
884 /*no full-member, if exists take the limited*/
885 if (partial_ix >= 0) {
891 EXPORT_SYMBOL(ib_find_pkey);
894 * ib_get_net_dev_by_params() - Return the appropriate net_dev
895 * for a received CM request
896 * @dev: An RDMA device on which the request has been received.
897 * @port: Port number on the RDMA device.
898 * @pkey: The Pkey the request came on.
899 * @gid: A GID that the net_dev uses to communicate.
900 * @addr: Contains the IP address that the request specified as its
903 struct net_device *ib_get_net_dev_by_params(struct ib_device *dev,
906 const union ib_gid *gid,
907 const struct sockaddr *addr)
909 struct net_device *net_dev = NULL;
910 struct ib_client_data *context;
912 if (!rdma_protocol_ib(dev, port))
915 down_read(&lists_rwsem);
917 list_for_each_entry(context, &dev->client_data_list, list) {
918 struct ib_client *client = context->client;
920 if (context->going_down)
923 if (client->get_net_dev_by_params) {
924 net_dev = client->get_net_dev_by_params(dev, port, pkey,
932 up_read(&lists_rwsem);
936 EXPORT_SYMBOL(ib_get_net_dev_by_params);
938 static int __init ib_core_init(void)
942 ib_wq = alloc_workqueue("infiniband", 0, 0);
946 ret = class_register(&ib_class);
948 printk(KERN_WARNING "Couldn't create InfiniBand device class\n");
954 printk(KERN_WARNING "Couldn't init IB netlink interface\n");
963 class_unregister(&ib_class);
966 destroy_workqueue(ib_wq);
970 static void __exit ib_core_cleanup(void)
974 class_unregister(&ib_class);
975 /* Make sure that any pending umem accounting work is done. */
976 destroy_workqueue(ib_wq);
979 module_init(ib_core_init);
980 module_exit(ib_core_cleanup);