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_comp_wq;
62 struct workqueue_struct *ib_comp_unbound_wq;
63 struct workqueue_struct *ib_wq;
64 EXPORT_SYMBOL_GPL(ib_wq);
66 /* The device_list and client_list contain devices and clients after their
67 * registration has completed, and the devices and clients are removed
68 * during unregistration. */
69 static LIST_HEAD(device_list);
70 static LIST_HEAD(client_list);
73 * device_mutex and lists_rwsem protect access to both device_list and
74 * client_list. device_mutex protects writer access by device and client
75 * registration / de-registration. lists_rwsem protects reader access to
76 * these lists. Iterators of these lists must lock it for read, while updates
77 * to the lists must be done with a write lock. A special case is when the
78 * device_mutex is locked. In this case locking the lists for read access is
79 * not necessary as the device_mutex implies it.
81 * lists_rwsem also protects access to the client data list.
83 static DEFINE_MUTEX(device_mutex);
84 static DECLARE_RWSEM(lists_rwsem);
87 static int ib_device_check_mandatory(struct ib_device *device)
89 #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x }
93 } mandatory_table[] = {
94 IB_MANDATORY_FUNC(query_device),
95 IB_MANDATORY_FUNC(query_port),
96 IB_MANDATORY_FUNC(query_pkey),
97 IB_MANDATORY_FUNC(query_gid),
98 IB_MANDATORY_FUNC(alloc_pd),
99 IB_MANDATORY_FUNC(dealloc_pd),
100 IB_MANDATORY_FUNC(create_ah),
101 IB_MANDATORY_FUNC(destroy_ah),
102 IB_MANDATORY_FUNC(create_qp),
103 IB_MANDATORY_FUNC(modify_qp),
104 IB_MANDATORY_FUNC(destroy_qp),
105 IB_MANDATORY_FUNC(post_send),
106 IB_MANDATORY_FUNC(post_recv),
107 IB_MANDATORY_FUNC(create_cq),
108 IB_MANDATORY_FUNC(destroy_cq),
109 IB_MANDATORY_FUNC(poll_cq),
110 IB_MANDATORY_FUNC(req_notify_cq),
111 IB_MANDATORY_FUNC(get_dma_mr),
112 IB_MANDATORY_FUNC(dereg_mr),
113 IB_MANDATORY_FUNC(get_port_immutable)
117 for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) {
118 if (!*(void **) ((void *) device + mandatory_table[i].offset)) {
119 pr_warn("Device %s is missing mandatory function %s\n",
120 device->name, mandatory_table[i].name);
128 static struct ib_device *__ib_device_get_by_name(const char *name)
130 struct ib_device *device;
132 list_for_each_entry(device, &device_list, core_list)
133 if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX))
140 static int alloc_name(char *name)
142 unsigned long *inuse;
143 char buf[IB_DEVICE_NAME_MAX];
144 struct ib_device *device;
147 inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL);
151 list_for_each_entry(device, &device_list, core_list) {
152 if (!sscanf(device->name, name, &i))
154 if (i < 0 || i >= PAGE_SIZE * 8)
156 snprintf(buf, sizeof buf, name, i);
157 if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX))
161 i = find_first_zero_bit(inuse, PAGE_SIZE * 8);
162 free_page((unsigned long) inuse);
163 snprintf(buf, sizeof buf, name, i);
165 if (__ib_device_get_by_name(buf))
168 strlcpy(name, buf, IB_DEVICE_NAME_MAX);
172 static void ib_device_release(struct device *device)
174 struct ib_device *dev = container_of(device, struct ib_device, dev);
176 ib_cache_release_one(dev);
177 kfree(dev->port_immutable);
181 static int ib_device_uevent(struct device *device,
182 struct kobj_uevent_env *env)
184 struct ib_device *dev = container_of(device, struct ib_device, dev);
186 if (add_uevent_var(env, "NAME=%s", dev->name))
190 * It would be nice to pass the node GUID with the event...
196 static struct class ib_class = {
197 .name = "infiniband",
198 .dev_release = ib_device_release,
199 .dev_uevent = ib_device_uevent,
203 * ib_alloc_device - allocate an IB device struct
204 * @size:size of structure to allocate
206 * Low-level drivers should use ib_alloc_device() to allocate &struct
207 * ib_device. @size is the size of the structure to be allocated,
208 * including any private data used by the low-level driver.
209 * ib_dealloc_device() must be used to free structures allocated with
212 struct ib_device *ib_alloc_device(size_t size)
214 struct ib_device *device;
216 if (WARN_ON(size < sizeof(struct ib_device)))
219 device = kzalloc(size, GFP_KERNEL);
223 device->dev.class = &ib_class;
224 device_initialize(&device->dev);
226 dev_set_drvdata(&device->dev, device);
228 INIT_LIST_HEAD(&device->event_handler_list);
229 spin_lock_init(&device->event_handler_lock);
230 spin_lock_init(&device->client_data_lock);
231 INIT_LIST_HEAD(&device->client_data_list);
232 INIT_LIST_HEAD(&device->port_list);
236 EXPORT_SYMBOL(ib_alloc_device);
239 * ib_dealloc_device - free an IB device struct
240 * @device:structure to free
242 * Free a structure allocated with ib_alloc_device().
244 void ib_dealloc_device(struct ib_device *device)
246 WARN_ON(device->reg_state != IB_DEV_UNREGISTERED &&
247 device->reg_state != IB_DEV_UNINITIALIZED);
248 kobject_put(&device->dev.kobj);
250 EXPORT_SYMBOL(ib_dealloc_device);
252 static int add_client_context(struct ib_device *device, struct ib_client *client)
254 struct ib_client_data *context;
257 context = kmalloc(sizeof *context, GFP_KERNEL);
259 pr_warn("Couldn't allocate client context for %s/%s\n",
260 device->name, client->name);
264 context->client = client;
265 context->data = NULL;
266 context->going_down = false;
268 down_write(&lists_rwsem);
269 spin_lock_irqsave(&device->client_data_lock, flags);
270 list_add(&context->list, &device->client_data_list);
271 spin_unlock_irqrestore(&device->client_data_lock, flags);
272 up_write(&lists_rwsem);
277 static int verify_immutable(const struct ib_device *dev, u8 port)
279 return WARN_ON(!rdma_cap_ib_mad(dev, port) &&
280 rdma_max_mad_size(dev, port) != 0);
283 static int read_port_immutable(struct ib_device *device)
286 u8 start_port = rdma_start_port(device);
287 u8 end_port = rdma_end_port(device);
291 * device->port_immutable is indexed directly by the port number to make
292 * access to this data as efficient as possible.
294 * Therefore port_immutable is declared as a 1 based array with
295 * potential empty slots at the beginning.
297 device->port_immutable = kzalloc(sizeof(*device->port_immutable)
300 if (!device->port_immutable)
303 for (port = start_port; port <= end_port; ++port) {
304 ret = device->get_port_immutable(device, port,
305 &device->port_immutable[port]);
309 if (verify_immutable(device, port))
315 void ib_get_device_fw_str(struct ib_device *dev, char *str, size_t str_len)
317 if (dev->get_dev_fw_str)
318 dev->get_dev_fw_str(dev, str, str_len);
322 EXPORT_SYMBOL(ib_get_device_fw_str);
325 * ib_register_device - Register an IB device with IB core
326 * @device:Device to register
328 * Low-level drivers use ib_register_device() to register their
329 * devices with the IB core. All registered clients will receive a
330 * callback for each device that is added. @device must be allocated
331 * with ib_alloc_device().
333 int ib_register_device(struct ib_device *device,
334 int (*port_callback)(struct ib_device *,
335 u8, struct kobject *))
338 struct ib_client *client;
339 struct ib_udata uhw = {.outlen = 0, .inlen = 0};
341 mutex_lock(&device_mutex);
343 if (strchr(device->name, '%')) {
344 ret = alloc_name(device->name);
349 if (ib_device_check_mandatory(device)) {
354 ret = read_port_immutable(device);
356 pr_warn("Couldn't create per port immutable data %s\n",
361 ret = ib_cache_setup_one(device);
363 pr_warn("Couldn't set up InfiniBand P_Key/GID cache\n");
367 memset(&device->attrs, 0, sizeof(device->attrs));
368 ret = device->query_device(device, &device->attrs, &uhw);
370 pr_warn("Couldn't query the device attributes\n");
371 ib_cache_cleanup_one(device);
375 ret = ib_device_register_sysfs(device, port_callback);
377 pr_warn("Couldn't register device %s with driver model\n",
379 ib_cache_cleanup_one(device);
383 device->reg_state = IB_DEV_REGISTERED;
385 list_for_each_entry(client, &client_list, list)
386 if (client->add && !add_client_context(device, client))
389 down_write(&lists_rwsem);
390 list_add_tail(&device->core_list, &device_list);
391 up_write(&lists_rwsem);
393 mutex_unlock(&device_mutex);
396 EXPORT_SYMBOL(ib_register_device);
399 * ib_unregister_device - Unregister an IB device
400 * @device:Device to unregister
402 * Unregister an IB device. All clients will receive a remove callback.
404 void ib_unregister_device(struct ib_device *device)
406 struct ib_client_data *context, *tmp;
409 mutex_lock(&device_mutex);
411 down_write(&lists_rwsem);
412 list_del(&device->core_list);
413 spin_lock_irqsave(&device->client_data_lock, flags);
414 list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
415 context->going_down = true;
416 spin_unlock_irqrestore(&device->client_data_lock, flags);
417 downgrade_write(&lists_rwsem);
419 list_for_each_entry_safe(context, tmp, &device->client_data_list,
421 if (context->client->remove)
422 context->client->remove(device, context->data);
424 up_read(&lists_rwsem);
426 mutex_unlock(&device_mutex);
428 ib_device_unregister_sysfs(device);
429 ib_cache_cleanup_one(device);
431 down_write(&lists_rwsem);
432 spin_lock_irqsave(&device->client_data_lock, flags);
433 list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
435 spin_unlock_irqrestore(&device->client_data_lock, flags);
436 up_write(&lists_rwsem);
438 device->reg_state = IB_DEV_UNREGISTERED;
440 EXPORT_SYMBOL(ib_unregister_device);
443 * ib_register_client - Register an IB client
444 * @client:Client to register
446 * Upper level users of the IB drivers can use ib_register_client() to
447 * register callbacks for IB device addition and removal. When an IB
448 * device is added, each registered client's add method will be called
449 * (in the order the clients were registered), and when a device is
450 * removed, each client's remove method will be called (in the reverse
451 * order that clients were registered). In addition, when
452 * ib_register_client() is called, the client will receive an add
453 * callback for all devices already registered.
455 int ib_register_client(struct ib_client *client)
457 struct ib_device *device;
459 mutex_lock(&device_mutex);
461 list_for_each_entry(device, &device_list, core_list)
462 if (client->add && !add_client_context(device, client))
465 down_write(&lists_rwsem);
466 list_add_tail(&client->list, &client_list);
467 up_write(&lists_rwsem);
469 mutex_unlock(&device_mutex);
473 EXPORT_SYMBOL(ib_register_client);
476 * ib_unregister_client - Unregister an IB client
477 * @client:Client to unregister
479 * Upper level users use ib_unregister_client() to remove their client
480 * registration. When ib_unregister_client() is called, the client
481 * will receive a remove callback for each IB device still registered.
483 void ib_unregister_client(struct ib_client *client)
485 struct ib_client_data *context, *tmp;
486 struct ib_device *device;
489 mutex_lock(&device_mutex);
491 down_write(&lists_rwsem);
492 list_del(&client->list);
493 up_write(&lists_rwsem);
495 list_for_each_entry(device, &device_list, core_list) {
496 struct ib_client_data *found_context = NULL;
498 down_write(&lists_rwsem);
499 spin_lock_irqsave(&device->client_data_lock, flags);
500 list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
501 if (context->client == client) {
502 context->going_down = true;
503 found_context = context;
506 spin_unlock_irqrestore(&device->client_data_lock, flags);
507 up_write(&lists_rwsem);
510 client->remove(device, found_context ?
511 found_context->data : NULL);
513 if (!found_context) {
514 pr_warn("No client context found for %s/%s\n",
515 device->name, client->name);
519 down_write(&lists_rwsem);
520 spin_lock_irqsave(&device->client_data_lock, flags);
521 list_del(&found_context->list);
522 kfree(found_context);
523 spin_unlock_irqrestore(&device->client_data_lock, flags);
524 up_write(&lists_rwsem);
527 mutex_unlock(&device_mutex);
529 EXPORT_SYMBOL(ib_unregister_client);
532 * ib_get_client_data - Get IB client context
533 * @device:Device to get context for
534 * @client:Client to get context for
536 * ib_get_client_data() returns client context set with
537 * ib_set_client_data().
539 void *ib_get_client_data(struct ib_device *device, struct ib_client *client)
541 struct ib_client_data *context;
545 spin_lock_irqsave(&device->client_data_lock, flags);
546 list_for_each_entry(context, &device->client_data_list, list)
547 if (context->client == client) {
551 spin_unlock_irqrestore(&device->client_data_lock, flags);
555 EXPORT_SYMBOL(ib_get_client_data);
558 * ib_set_client_data - Set IB client context
559 * @device:Device to set context for
560 * @client:Client to set context for
561 * @data:Context to set
563 * ib_set_client_data() sets client context that can be retrieved with
564 * ib_get_client_data().
566 void ib_set_client_data(struct ib_device *device, struct ib_client *client,
569 struct ib_client_data *context;
572 spin_lock_irqsave(&device->client_data_lock, flags);
573 list_for_each_entry(context, &device->client_data_list, list)
574 if (context->client == client) {
575 context->data = data;
579 pr_warn("No client context found for %s/%s\n",
580 device->name, client->name);
583 spin_unlock_irqrestore(&device->client_data_lock, flags);
585 EXPORT_SYMBOL(ib_set_client_data);
588 * ib_register_event_handler - Register an IB event handler
589 * @event_handler:Handler to register
591 * ib_register_event_handler() registers an event handler that will be
592 * called back when asynchronous IB events occur (as defined in
593 * chapter 11 of the InfiniBand Architecture Specification). This
594 * callback may occur in interrupt context.
596 int ib_register_event_handler (struct ib_event_handler *event_handler)
600 spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
601 list_add_tail(&event_handler->list,
602 &event_handler->device->event_handler_list);
603 spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
607 EXPORT_SYMBOL(ib_register_event_handler);
610 * ib_unregister_event_handler - Unregister an event handler
611 * @event_handler:Handler to unregister
613 * Unregister an event handler registered with
614 * ib_register_event_handler().
616 int ib_unregister_event_handler(struct ib_event_handler *event_handler)
620 spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
621 list_del(&event_handler->list);
622 spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
626 EXPORT_SYMBOL(ib_unregister_event_handler);
629 * ib_dispatch_event - Dispatch an asynchronous event
630 * @event:Event to dispatch
632 * Low-level drivers must call ib_dispatch_event() to dispatch the
633 * event to all registered event handlers when an asynchronous event
636 void ib_dispatch_event(struct ib_event *event)
639 struct ib_event_handler *handler;
641 spin_lock_irqsave(&event->device->event_handler_lock, flags);
643 list_for_each_entry(handler, &event->device->event_handler_list, list)
644 handler->handler(handler, event);
646 spin_unlock_irqrestore(&event->device->event_handler_lock, flags);
648 EXPORT_SYMBOL(ib_dispatch_event);
651 * ib_query_port - Query IB port attributes
652 * @device:Device to query
653 * @port_num:Port number to query
654 * @port_attr:Port attributes
656 * ib_query_port() returns the attributes of a port through the
657 * @port_attr pointer.
659 int ib_query_port(struct ib_device *device,
661 struct ib_port_attr *port_attr)
666 if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
669 memset(port_attr, 0, sizeof(*port_attr));
670 err = device->query_port(device, port_num, port_attr);
671 if (err || port_attr->subnet_prefix)
674 if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND)
677 err = ib_query_gid(device, port_num, 0, &gid, NULL);
681 port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix);
684 EXPORT_SYMBOL(ib_query_port);
687 * ib_query_gid - Get GID table entry
688 * @device:Device to query
689 * @port_num:Port number to query
690 * @index:GID table index to query
692 * @attr: Returned GID attributes related to this GID index (only in RoCE).
695 * ib_query_gid() fetches the specified GID table entry.
697 int ib_query_gid(struct ib_device *device,
698 u8 port_num, int index, union ib_gid *gid,
699 struct ib_gid_attr *attr)
701 if (rdma_cap_roce_gid_table(device, port_num))
702 return ib_get_cached_gid(device, port_num, index, gid, attr);
707 return device->query_gid(device, port_num, index, gid);
709 EXPORT_SYMBOL(ib_query_gid);
712 * ib_enum_roce_netdev - enumerate all RoCE ports
713 * @ib_dev : IB device we want to query
714 * @filter: Should we call the callback?
715 * @filter_cookie: Cookie passed to filter
716 * @cb: Callback to call for each found RoCE ports
717 * @cookie: Cookie passed back to the callback
719 * Enumerates all of the physical RoCE ports of ib_dev
720 * which are related to netdevice and calls callback() on each
721 * device for which filter() function returns non zero.
723 void ib_enum_roce_netdev(struct ib_device *ib_dev,
724 roce_netdev_filter filter,
726 roce_netdev_callback cb,
731 for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev);
733 if (rdma_protocol_roce(ib_dev, port)) {
734 struct net_device *idev = NULL;
736 if (ib_dev->get_netdev)
737 idev = ib_dev->get_netdev(ib_dev, port);
740 idev->reg_state >= NETREG_UNREGISTERED) {
745 if (filter(ib_dev, port, idev, filter_cookie))
746 cb(ib_dev, port, idev, cookie);
754 * ib_enum_all_roce_netdevs - enumerate all RoCE devices
755 * @filter: Should we call the callback?
756 * @filter_cookie: Cookie passed to filter
757 * @cb: Callback to call for each found RoCE ports
758 * @cookie: Cookie passed back to the callback
760 * Enumerates all RoCE devices' physical ports which are related
761 * to netdevices and calls callback() on each device for which
762 * filter() function returns non zero.
764 void ib_enum_all_roce_netdevs(roce_netdev_filter filter,
766 roce_netdev_callback cb,
769 struct ib_device *dev;
771 down_read(&lists_rwsem);
772 list_for_each_entry(dev, &device_list, core_list)
773 ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie);
774 up_read(&lists_rwsem);
778 * ib_query_pkey - Get P_Key table entry
779 * @device:Device to query
780 * @port_num:Port number to query
781 * @index:P_Key table index to query
782 * @pkey:Returned P_Key
784 * ib_query_pkey() fetches the specified P_Key table entry.
786 int ib_query_pkey(struct ib_device *device,
787 u8 port_num, u16 index, u16 *pkey)
789 return device->query_pkey(device, port_num, index, pkey);
791 EXPORT_SYMBOL(ib_query_pkey);
794 * ib_modify_device - Change IB device attributes
795 * @device:Device to modify
796 * @device_modify_mask:Mask of attributes to change
797 * @device_modify:New attribute values
799 * ib_modify_device() changes a device's attributes as specified by
800 * the @device_modify_mask and @device_modify structure.
802 int ib_modify_device(struct ib_device *device,
803 int device_modify_mask,
804 struct ib_device_modify *device_modify)
806 if (!device->modify_device)
809 return device->modify_device(device, device_modify_mask,
812 EXPORT_SYMBOL(ib_modify_device);
815 * ib_modify_port - Modifies the attributes for the specified port.
816 * @device: The device to modify.
817 * @port_num: The number of the port to modify.
818 * @port_modify_mask: Mask used to specify which attributes of the port
820 * @port_modify: New attribute values for the port.
822 * ib_modify_port() changes a port's attributes as specified by the
823 * @port_modify_mask and @port_modify structure.
825 int ib_modify_port(struct ib_device *device,
826 u8 port_num, int port_modify_mask,
827 struct ib_port_modify *port_modify)
829 if (!device->modify_port)
832 if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
835 return device->modify_port(device, port_num, port_modify_mask,
838 EXPORT_SYMBOL(ib_modify_port);
841 * ib_find_gid - Returns the port number and GID table index where
842 * a specified GID value occurs.
843 * @device: The device to query.
844 * @gid: The GID value to search for.
845 * @gid_type: Type of GID.
846 * @ndev: The ndev related to the GID to search for.
847 * @port_num: The port number of the device where the GID value was found.
848 * @index: The index into the GID table where the GID was found. This
849 * parameter may be NULL.
851 int ib_find_gid(struct ib_device *device, union ib_gid *gid,
852 enum ib_gid_type gid_type, struct net_device *ndev,
853 u8 *port_num, u16 *index)
855 union ib_gid tmp_gid;
858 for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) {
859 if (rdma_cap_roce_gid_table(device, port)) {
860 if (!ib_find_cached_gid_by_port(device, gid, gid_type, port,
867 if (gid_type != IB_GID_TYPE_IB)
870 for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) {
871 ret = ib_query_gid(device, port, i, &tmp_gid, NULL);
875 if (!memcmp(&tmp_gid, gid, sizeof *gid)) {
886 EXPORT_SYMBOL(ib_find_gid);
889 * ib_find_pkey - Returns the PKey table index where a specified
891 * @device: The device to query.
892 * @port_num: The port number of the device to search for the PKey.
893 * @pkey: The PKey value to search for.
894 * @index: The index into the PKey table where the PKey was found.
896 int ib_find_pkey(struct ib_device *device,
897 u8 port_num, u16 pkey, u16 *index)
903 for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) {
904 ret = ib_query_pkey(device, port_num, i, &tmp_pkey);
907 if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) {
908 /* if there is full-member pkey take it.*/
909 if (tmp_pkey & 0x8000) {
918 /*no full-member, if exists take the limited*/
919 if (partial_ix >= 0) {
925 EXPORT_SYMBOL(ib_find_pkey);
928 * ib_get_net_dev_by_params() - Return the appropriate net_dev
929 * for a received CM request
930 * @dev: An RDMA device on which the request has been received.
931 * @port: Port number on the RDMA device.
932 * @pkey: The Pkey the request came on.
933 * @gid: A GID that the net_dev uses to communicate.
934 * @addr: Contains the IP address that the request specified as its
937 struct net_device *ib_get_net_dev_by_params(struct ib_device *dev,
940 const union ib_gid *gid,
941 const struct sockaddr *addr)
943 struct net_device *net_dev = NULL;
944 struct ib_client_data *context;
946 if (!rdma_protocol_ib(dev, port))
949 down_read(&lists_rwsem);
951 list_for_each_entry(context, &dev->client_data_list, list) {
952 struct ib_client *client = context->client;
954 if (context->going_down)
957 if (client->get_net_dev_by_params) {
958 net_dev = client->get_net_dev_by_params(dev, port, pkey,
966 up_read(&lists_rwsem);
970 EXPORT_SYMBOL(ib_get_net_dev_by_params);
972 static struct ibnl_client_cbs ibnl_ls_cb_table[] = {
973 [RDMA_NL_LS_OP_RESOLVE] = {
974 .dump = ib_nl_handle_resolve_resp,
975 .module = THIS_MODULE },
976 [RDMA_NL_LS_OP_SET_TIMEOUT] = {
977 .dump = ib_nl_handle_set_timeout,
978 .module = THIS_MODULE },
979 [RDMA_NL_LS_OP_IP_RESOLVE] = {
980 .dump = ib_nl_handle_ip_res_resp,
981 .module = THIS_MODULE },
984 static int ib_add_ibnl_clients(void)
986 return ibnl_add_client(RDMA_NL_LS, ARRAY_SIZE(ibnl_ls_cb_table),
990 static void ib_remove_ibnl_clients(void)
992 ibnl_remove_client(RDMA_NL_LS);
995 static int __init ib_core_init(void)
999 ib_wq = alloc_workqueue("infiniband", 0, 0);
1003 ib_comp_wq = alloc_workqueue("ib-comp-wq",
1004 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, 0);
1010 ib_comp_unbound_wq =
1011 alloc_workqueue("ib-comp-unb-wq",
1012 WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM |
1013 WQ_SYSFS, WQ_UNBOUND_MAX_ACTIVE);
1014 if (!ib_comp_unbound_wq) {
1019 ret = class_register(&ib_class);
1021 pr_warn("Couldn't create InfiniBand device class\n");
1022 goto err_comp_unbound;
1027 pr_warn("Couldn't init IB netlink interface\n");
1033 pr_warn("Could't init IB address resolution\n");
1037 ret = ib_mad_init();
1039 pr_warn("Couldn't init IB MAD\n");
1045 pr_warn("Couldn't init SA\n");
1049 ret = ib_add_ibnl_clients();
1051 pr_warn("Couldn't register ibnl clients\n");
1068 class_unregister(&ib_class);
1070 destroy_workqueue(ib_comp_unbound_wq);
1072 destroy_workqueue(ib_comp_wq);
1074 destroy_workqueue(ib_wq);
1078 static void __exit ib_core_cleanup(void)
1081 ib_remove_ibnl_clients();
1086 class_unregister(&ib_class);
1087 destroy_workqueue(ib_comp_unbound_wq);
1088 destroy_workqueue(ib_comp_wq);
1089 /* Make sure that any pending umem accounting work is done. */
1090 destroy_workqueue(ib_wq);
1093 module_init(ib_core_init);
1094 module_exit(ib_core_cleanup);