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 <linux/security.h>
43 #include <linux/notifier.h>
44 #include <rdma/rdma_netlink.h>
45 #include <rdma/ib_addr.h>
46 #include <rdma/ib_cache.h>
48 #include "core_priv.h"
50 MODULE_AUTHOR("Roland Dreier");
51 MODULE_DESCRIPTION("core kernel InfiniBand API");
52 MODULE_LICENSE("Dual BSD/GPL");
54 struct ib_client_data
{
55 struct list_head list
;
56 struct ib_client
*client
;
58 /* The device or client is going down. Do not call client or device
59 * callbacks other than remove(). */
63 struct workqueue_struct
*ib_comp_wq
;
64 struct workqueue_struct
*ib_wq
;
65 EXPORT_SYMBOL_GPL(ib_wq
);
67 /* The device_list and client_list contain devices and clients after their
68 * registration has completed, and the devices and clients are removed
69 * during unregistration. */
70 static LIST_HEAD(device_list
);
71 static LIST_HEAD(client_list
);
74 * device_mutex and lists_rwsem protect access to both device_list and
75 * client_list. device_mutex protects writer access by device and client
76 * registration / de-registration. lists_rwsem protects reader access to
77 * these lists. Iterators of these lists must lock it for read, while updates
78 * to the lists must be done with a write lock. A special case is when the
79 * device_mutex is locked. In this case locking the lists for read access is
80 * not necessary as the device_mutex implies it.
82 * lists_rwsem also protects access to the client data list.
84 static DEFINE_MUTEX(device_mutex
);
85 static DECLARE_RWSEM(lists_rwsem
);
87 static int ib_security_change(struct notifier_block
*nb
, unsigned long event
,
89 static void ib_policy_change_task(struct work_struct
*work
);
90 static DECLARE_WORK(ib_policy_change_work
, ib_policy_change_task
);
92 static struct notifier_block ibdev_lsm_nb
= {
93 .notifier_call
= ib_security_change
,
96 static int ib_device_check_mandatory(struct ib_device
*device
)
98 #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x }
102 } mandatory_table
[] = {
103 IB_MANDATORY_FUNC(query_device
),
104 IB_MANDATORY_FUNC(query_port
),
105 IB_MANDATORY_FUNC(query_pkey
),
106 IB_MANDATORY_FUNC(query_gid
),
107 IB_MANDATORY_FUNC(alloc_pd
),
108 IB_MANDATORY_FUNC(dealloc_pd
),
109 IB_MANDATORY_FUNC(create_ah
),
110 IB_MANDATORY_FUNC(destroy_ah
),
111 IB_MANDATORY_FUNC(create_qp
),
112 IB_MANDATORY_FUNC(modify_qp
),
113 IB_MANDATORY_FUNC(destroy_qp
),
114 IB_MANDATORY_FUNC(post_send
),
115 IB_MANDATORY_FUNC(post_recv
),
116 IB_MANDATORY_FUNC(create_cq
),
117 IB_MANDATORY_FUNC(destroy_cq
),
118 IB_MANDATORY_FUNC(poll_cq
),
119 IB_MANDATORY_FUNC(req_notify_cq
),
120 IB_MANDATORY_FUNC(get_dma_mr
),
121 IB_MANDATORY_FUNC(dereg_mr
),
122 IB_MANDATORY_FUNC(get_port_immutable
)
126 for (i
= 0; i
< ARRAY_SIZE(mandatory_table
); ++i
) {
127 if (!*(void **) ((void *) device
+ mandatory_table
[i
].offset
)) {
128 pr_warn("Device %s is missing mandatory function %s\n",
129 device
->name
, mandatory_table
[i
].name
);
137 struct ib_device
*__ib_device_get_by_index(u32 index
)
139 struct ib_device
*device
;
141 list_for_each_entry(device
, &device_list
, core_list
)
142 if (device
->index
== index
)
148 static struct ib_device
*__ib_device_get_by_name(const char *name
)
150 struct ib_device
*device
;
152 list_for_each_entry(device
, &device_list
, core_list
)
153 if (!strncmp(name
, device
->name
, IB_DEVICE_NAME_MAX
))
159 static int alloc_name(char *name
)
161 unsigned long *inuse
;
162 char buf
[IB_DEVICE_NAME_MAX
];
163 struct ib_device
*device
;
166 inuse
= (unsigned long *) get_zeroed_page(GFP_KERNEL
);
170 list_for_each_entry(device
, &device_list
, core_list
) {
171 if (!sscanf(device
->name
, name
, &i
))
173 if (i
< 0 || i
>= PAGE_SIZE
* 8)
175 snprintf(buf
, sizeof buf
, name
, i
);
176 if (!strncmp(buf
, device
->name
, IB_DEVICE_NAME_MAX
))
180 i
= find_first_zero_bit(inuse
, PAGE_SIZE
* 8);
181 free_page((unsigned long) inuse
);
182 snprintf(buf
, sizeof buf
, name
, i
);
184 if (__ib_device_get_by_name(buf
))
187 strlcpy(name
, buf
, IB_DEVICE_NAME_MAX
);
191 static void ib_device_release(struct device
*device
)
193 struct ib_device
*dev
= container_of(device
, struct ib_device
, dev
);
195 WARN_ON(dev
->reg_state
== IB_DEV_REGISTERED
);
196 if (dev
->reg_state
== IB_DEV_UNREGISTERED
) {
198 * In IB_DEV_UNINITIALIZED state, cache or port table
199 * is not even created. Free cache and port table only when
200 * device reaches UNREGISTERED state.
202 ib_cache_release_one(dev
);
203 kfree(dev
->port_immutable
);
208 static int ib_device_uevent(struct device
*device
,
209 struct kobj_uevent_env
*env
)
211 struct ib_device
*dev
= container_of(device
, struct ib_device
, dev
);
213 if (add_uevent_var(env
, "NAME=%s", dev
->name
))
217 * It would be nice to pass the node GUID with the event...
223 static struct class ib_class
= {
224 .name
= "infiniband",
225 .dev_release
= ib_device_release
,
226 .dev_uevent
= ib_device_uevent
,
230 * ib_alloc_device - allocate an IB device struct
231 * @size:size of structure to allocate
233 * Low-level drivers should use ib_alloc_device() to allocate &struct
234 * ib_device. @size is the size of the structure to be allocated,
235 * including any private data used by the low-level driver.
236 * ib_dealloc_device() must be used to free structures allocated with
239 struct ib_device
*ib_alloc_device(size_t size
)
241 struct ib_device
*device
;
243 if (WARN_ON(size
< sizeof(struct ib_device
)))
246 device
= kzalloc(size
, GFP_KERNEL
);
250 device
->dev
.class = &ib_class
;
251 device_initialize(&device
->dev
);
253 dev_set_drvdata(&device
->dev
, device
);
255 INIT_LIST_HEAD(&device
->event_handler_list
);
256 spin_lock_init(&device
->event_handler_lock
);
257 spin_lock_init(&device
->client_data_lock
);
258 INIT_LIST_HEAD(&device
->client_data_list
);
259 INIT_LIST_HEAD(&device
->port_list
);
263 EXPORT_SYMBOL(ib_alloc_device
);
266 * ib_dealloc_device - free an IB device struct
267 * @device:structure to free
269 * Free a structure allocated with ib_alloc_device().
271 void ib_dealloc_device(struct ib_device
*device
)
273 WARN_ON(device
->reg_state
!= IB_DEV_UNREGISTERED
&&
274 device
->reg_state
!= IB_DEV_UNINITIALIZED
);
275 kobject_put(&device
->dev
.kobj
);
277 EXPORT_SYMBOL(ib_dealloc_device
);
279 static int add_client_context(struct ib_device
*device
, struct ib_client
*client
)
281 struct ib_client_data
*context
;
284 context
= kmalloc(sizeof *context
, GFP_KERNEL
);
288 context
->client
= client
;
289 context
->data
= NULL
;
290 context
->going_down
= false;
292 down_write(&lists_rwsem
);
293 spin_lock_irqsave(&device
->client_data_lock
, flags
);
294 list_add(&context
->list
, &device
->client_data_list
);
295 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
296 up_write(&lists_rwsem
);
301 static int verify_immutable(const struct ib_device
*dev
, u8 port
)
303 return WARN_ON(!rdma_cap_ib_mad(dev
, port
) &&
304 rdma_max_mad_size(dev
, port
) != 0);
307 static int read_port_immutable(struct ib_device
*device
)
310 u8 start_port
= rdma_start_port(device
);
311 u8 end_port
= rdma_end_port(device
);
315 * device->port_immutable is indexed directly by the port number to make
316 * access to this data as efficient as possible.
318 * Therefore port_immutable is declared as a 1 based array with
319 * potential empty slots at the beginning.
321 device
->port_immutable
= kzalloc(sizeof(*device
->port_immutable
)
324 if (!device
->port_immutable
)
327 for (port
= start_port
; port
<= end_port
; ++port
) {
328 ret
= device
->get_port_immutable(device
, port
,
329 &device
->port_immutable
[port
]);
333 if (verify_immutable(device
, port
))
339 void ib_get_device_fw_str(struct ib_device
*dev
, char *str
)
341 if (dev
->get_dev_fw_str
)
342 dev
->get_dev_fw_str(dev
, str
);
346 EXPORT_SYMBOL(ib_get_device_fw_str
);
348 static int setup_port_pkey_list(struct ib_device
*device
)
353 * device->port_pkey_list is indexed directly by the port number,
354 * Therefore it is declared as a 1 based array with potential empty
355 * slots at the beginning.
357 device
->port_pkey_list
= kcalloc(rdma_end_port(device
) + 1,
358 sizeof(*device
->port_pkey_list
),
361 if (!device
->port_pkey_list
)
364 for (i
= 0; i
< (rdma_end_port(device
) + 1); i
++) {
365 spin_lock_init(&device
->port_pkey_list
[i
].list_lock
);
366 INIT_LIST_HEAD(&device
->port_pkey_list
[i
].pkey_list
);
372 static void ib_policy_change_task(struct work_struct
*work
)
374 struct ib_device
*dev
;
376 down_read(&lists_rwsem
);
377 list_for_each_entry(dev
, &device_list
, core_list
) {
380 for (i
= rdma_start_port(dev
); i
<= rdma_end_port(dev
); i
++) {
382 int ret
= ib_get_cached_subnet_prefix(dev
,
387 "ib_get_cached_subnet_prefix err: %d, this should never happen here\n",
390 ib_security_cache_change(dev
, i
, sp
);
393 up_read(&lists_rwsem
);
396 static int ib_security_change(struct notifier_block
*nb
, unsigned long event
,
399 if (event
!= LSM_POLICY_CHANGE
)
402 schedule_work(&ib_policy_change_work
);
408 * __dev_new_index - allocate an device index
410 * Returns a suitable unique value for a new device interface
411 * number. It assumes that there are less than 2^32-1 ib devices
412 * will be present in the system.
414 static u32
__dev_new_index(void)
417 * The device index to allow stable naming.
418 * Similar to struct net -> ifindex.
426 if (!__ib_device_get_by_index(index
))
432 * ib_register_device - Register an IB device with IB core
433 * @device:Device to register
435 * Low-level drivers use ib_register_device() to register their
436 * devices with the IB core. All registered clients will receive a
437 * callback for each device that is added. @device must be allocated
438 * with ib_alloc_device().
440 int ib_register_device(struct ib_device
*device
,
441 int (*port_callback
)(struct ib_device
*,
442 u8
, struct kobject
*))
445 struct ib_client
*client
;
446 struct ib_udata uhw
= {.outlen
= 0, .inlen
= 0};
447 struct device
*parent
= device
->dev
.parent
;
449 WARN_ON_ONCE(device
->dma_device
);
450 if (device
->dev
.dma_ops
) {
452 * The caller provided custom DMA operations. Copy the
453 * DMA-related fields that are used by e.g. dma_alloc_coherent()
456 device
->dma_device
= &device
->dev
;
457 if (!device
->dev
.dma_mask
) {
459 device
->dev
.dma_mask
= parent
->dma_mask
;
463 if (!device
->dev
.coherent_dma_mask
) {
465 device
->dev
.coherent_dma_mask
=
466 parent
->coherent_dma_mask
;
472 * The caller did not provide custom DMA operations. Use the
473 * DMA mapping operations of the parent device.
475 WARN_ON_ONCE(!parent
);
476 device
->dma_device
= parent
;
479 mutex_lock(&device_mutex
);
481 if (strchr(device
->name
, '%')) {
482 ret
= alloc_name(device
->name
);
487 if (ib_device_check_mandatory(device
)) {
492 ret
= read_port_immutable(device
);
494 pr_warn("Couldn't create per port immutable data %s\n",
499 ret
= setup_port_pkey_list(device
);
501 pr_warn("Couldn't create per port_pkey_list\n");
505 ret
= ib_cache_setup_one(device
);
507 pr_warn("Couldn't set up InfiniBand P_Key/GID cache\n");
511 ret
= ib_device_register_rdmacg(device
);
513 pr_warn("Couldn't register device with rdma cgroup\n");
517 memset(&device
->attrs
, 0, sizeof(device
->attrs
));
518 ret
= device
->query_device(device
, &device
->attrs
, &uhw
);
520 pr_warn("Couldn't query the device attributes\n");
524 ret
= ib_device_register_sysfs(device
, port_callback
);
526 pr_warn("Couldn't register device %s with driver model\n",
531 device
->reg_state
= IB_DEV_REGISTERED
;
533 list_for_each_entry(client
, &client_list
, list
)
534 if (!add_client_context(device
, client
) && client
->add
)
537 device
->index
= __dev_new_index();
538 down_write(&lists_rwsem
);
539 list_add_tail(&device
->core_list
, &device_list
);
540 up_write(&lists_rwsem
);
541 mutex_unlock(&device_mutex
);
545 ib_cache_cleanup_one(device
);
546 ib_cache_release_one(device
);
548 kfree(device
->port_immutable
);
550 mutex_unlock(&device_mutex
);
553 EXPORT_SYMBOL(ib_register_device
);
556 * ib_unregister_device - Unregister an IB device
557 * @device:Device to unregister
559 * Unregister an IB device. All clients will receive a remove callback.
561 void ib_unregister_device(struct ib_device
*device
)
563 struct ib_client_data
*context
, *tmp
;
566 mutex_lock(&device_mutex
);
568 down_write(&lists_rwsem
);
569 list_del(&device
->core_list
);
570 spin_lock_irqsave(&device
->client_data_lock
, flags
);
571 list_for_each_entry_safe(context
, tmp
, &device
->client_data_list
, list
)
572 context
->going_down
= true;
573 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
574 downgrade_write(&lists_rwsem
);
576 list_for_each_entry_safe(context
, tmp
, &device
->client_data_list
,
578 if (context
->client
->remove
)
579 context
->client
->remove(device
, context
->data
);
581 up_read(&lists_rwsem
);
583 ib_device_unregister_rdmacg(device
);
584 ib_device_unregister_sysfs(device
);
586 mutex_unlock(&device_mutex
);
588 ib_cache_cleanup_one(device
);
590 ib_security_destroy_port_pkey_list(device
);
591 kfree(device
->port_pkey_list
);
593 down_write(&lists_rwsem
);
594 spin_lock_irqsave(&device
->client_data_lock
, flags
);
595 list_for_each_entry_safe(context
, tmp
, &device
->client_data_list
, list
)
597 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
598 up_write(&lists_rwsem
);
600 device
->reg_state
= IB_DEV_UNREGISTERED
;
602 EXPORT_SYMBOL(ib_unregister_device
);
605 * ib_register_client - Register an IB client
606 * @client:Client to register
608 * Upper level users of the IB drivers can use ib_register_client() to
609 * register callbacks for IB device addition and removal. When an IB
610 * device is added, each registered client's add method will be called
611 * (in the order the clients were registered), and when a device is
612 * removed, each client's remove method will be called (in the reverse
613 * order that clients were registered). In addition, when
614 * ib_register_client() is called, the client will receive an add
615 * callback for all devices already registered.
617 int ib_register_client(struct ib_client
*client
)
619 struct ib_device
*device
;
621 mutex_lock(&device_mutex
);
623 list_for_each_entry(device
, &device_list
, core_list
)
624 if (!add_client_context(device
, client
) && client
->add
)
627 down_write(&lists_rwsem
);
628 list_add_tail(&client
->list
, &client_list
);
629 up_write(&lists_rwsem
);
631 mutex_unlock(&device_mutex
);
635 EXPORT_SYMBOL(ib_register_client
);
638 * ib_unregister_client - Unregister an IB client
639 * @client:Client to unregister
641 * Upper level users use ib_unregister_client() to remove their client
642 * registration. When ib_unregister_client() is called, the client
643 * will receive a remove callback for each IB device still registered.
645 void ib_unregister_client(struct ib_client
*client
)
647 struct ib_client_data
*context
, *tmp
;
648 struct ib_device
*device
;
651 mutex_lock(&device_mutex
);
653 down_write(&lists_rwsem
);
654 list_del(&client
->list
);
655 up_write(&lists_rwsem
);
657 list_for_each_entry(device
, &device_list
, core_list
) {
658 struct ib_client_data
*found_context
= NULL
;
660 down_write(&lists_rwsem
);
661 spin_lock_irqsave(&device
->client_data_lock
, flags
);
662 list_for_each_entry_safe(context
, tmp
, &device
->client_data_list
, list
)
663 if (context
->client
== client
) {
664 context
->going_down
= true;
665 found_context
= context
;
668 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
669 up_write(&lists_rwsem
);
672 client
->remove(device
, found_context
?
673 found_context
->data
: NULL
);
675 if (!found_context
) {
676 pr_warn("No client context found for %s/%s\n",
677 device
->name
, client
->name
);
681 down_write(&lists_rwsem
);
682 spin_lock_irqsave(&device
->client_data_lock
, flags
);
683 list_del(&found_context
->list
);
684 kfree(found_context
);
685 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
686 up_write(&lists_rwsem
);
689 mutex_unlock(&device_mutex
);
691 EXPORT_SYMBOL(ib_unregister_client
);
694 * ib_get_client_data - Get IB client context
695 * @device:Device to get context for
696 * @client:Client to get context for
698 * ib_get_client_data() returns client context set with
699 * ib_set_client_data().
701 void *ib_get_client_data(struct ib_device
*device
, struct ib_client
*client
)
703 struct ib_client_data
*context
;
707 spin_lock_irqsave(&device
->client_data_lock
, flags
);
708 list_for_each_entry(context
, &device
->client_data_list
, list
)
709 if (context
->client
== client
) {
713 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
717 EXPORT_SYMBOL(ib_get_client_data
);
720 * ib_set_client_data - Set IB client context
721 * @device:Device to set context for
722 * @client:Client to set context for
723 * @data:Context to set
725 * ib_set_client_data() sets client context that can be retrieved with
726 * ib_get_client_data().
728 void ib_set_client_data(struct ib_device
*device
, struct ib_client
*client
,
731 struct ib_client_data
*context
;
734 spin_lock_irqsave(&device
->client_data_lock
, flags
);
735 list_for_each_entry(context
, &device
->client_data_list
, list
)
736 if (context
->client
== client
) {
737 context
->data
= data
;
741 pr_warn("No client context found for %s/%s\n",
742 device
->name
, client
->name
);
745 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
747 EXPORT_SYMBOL(ib_set_client_data
);
750 * ib_register_event_handler - Register an IB event handler
751 * @event_handler:Handler to register
753 * ib_register_event_handler() registers an event handler that will be
754 * called back when asynchronous IB events occur (as defined in
755 * chapter 11 of the InfiniBand Architecture Specification). This
756 * callback may occur in interrupt context.
758 void ib_register_event_handler(struct ib_event_handler
*event_handler
)
762 spin_lock_irqsave(&event_handler
->device
->event_handler_lock
, flags
);
763 list_add_tail(&event_handler
->list
,
764 &event_handler
->device
->event_handler_list
);
765 spin_unlock_irqrestore(&event_handler
->device
->event_handler_lock
, flags
);
767 EXPORT_SYMBOL(ib_register_event_handler
);
770 * ib_unregister_event_handler - Unregister an event handler
771 * @event_handler:Handler to unregister
773 * Unregister an event handler registered with
774 * ib_register_event_handler().
776 void ib_unregister_event_handler(struct ib_event_handler
*event_handler
)
780 spin_lock_irqsave(&event_handler
->device
->event_handler_lock
, flags
);
781 list_del(&event_handler
->list
);
782 spin_unlock_irqrestore(&event_handler
->device
->event_handler_lock
, flags
);
784 EXPORT_SYMBOL(ib_unregister_event_handler
);
787 * ib_dispatch_event - Dispatch an asynchronous event
788 * @event:Event to dispatch
790 * Low-level drivers must call ib_dispatch_event() to dispatch the
791 * event to all registered event handlers when an asynchronous event
794 void ib_dispatch_event(struct ib_event
*event
)
797 struct ib_event_handler
*handler
;
799 spin_lock_irqsave(&event
->device
->event_handler_lock
, flags
);
801 list_for_each_entry(handler
, &event
->device
->event_handler_list
, list
)
802 handler
->handler(handler
, event
);
804 spin_unlock_irqrestore(&event
->device
->event_handler_lock
, flags
);
806 EXPORT_SYMBOL(ib_dispatch_event
);
809 * ib_query_port - Query IB port attributes
810 * @device:Device to query
811 * @port_num:Port number to query
812 * @port_attr:Port attributes
814 * ib_query_port() returns the attributes of a port through the
815 * @port_attr pointer.
817 int ib_query_port(struct ib_device
*device
,
819 struct ib_port_attr
*port_attr
)
824 if (!rdma_is_port_valid(device
, port_num
))
827 memset(port_attr
, 0, sizeof(*port_attr
));
828 err
= device
->query_port(device
, port_num
, port_attr
);
829 if (err
|| port_attr
->subnet_prefix
)
832 if (rdma_port_get_link_layer(device
, port_num
) != IB_LINK_LAYER_INFINIBAND
)
835 err
= ib_query_gid(device
, port_num
, 0, &gid
, NULL
);
839 port_attr
->subnet_prefix
= be64_to_cpu(gid
.global
.subnet_prefix
);
842 EXPORT_SYMBOL(ib_query_port
);
845 * ib_query_gid - Get GID table entry
846 * @device:Device to query
847 * @port_num:Port number to query
848 * @index:GID table index to query
850 * @attr: Returned GID attributes related to this GID index (only in RoCE).
853 * ib_query_gid() fetches the specified GID table entry.
855 int ib_query_gid(struct ib_device
*device
,
856 u8 port_num
, int index
, union ib_gid
*gid
,
857 struct ib_gid_attr
*attr
)
859 if (rdma_cap_roce_gid_table(device
, port_num
))
860 return ib_get_cached_gid(device
, port_num
, index
, gid
, attr
);
865 return device
->query_gid(device
, port_num
, index
, gid
);
867 EXPORT_SYMBOL(ib_query_gid
);
870 * ib_enum_roce_netdev - enumerate all RoCE ports
871 * @ib_dev : IB device we want to query
872 * @filter: Should we call the callback?
873 * @filter_cookie: Cookie passed to filter
874 * @cb: Callback to call for each found RoCE ports
875 * @cookie: Cookie passed back to the callback
877 * Enumerates all of the physical RoCE ports of ib_dev
878 * which are related to netdevice and calls callback() on each
879 * device for which filter() function returns non zero.
881 void ib_enum_roce_netdev(struct ib_device
*ib_dev
,
882 roce_netdev_filter filter
,
884 roce_netdev_callback cb
,
889 for (port
= rdma_start_port(ib_dev
); port
<= rdma_end_port(ib_dev
);
891 if (rdma_protocol_roce(ib_dev
, port
)) {
892 struct net_device
*idev
= NULL
;
894 if (ib_dev
->get_netdev
)
895 idev
= ib_dev
->get_netdev(ib_dev
, port
);
898 idev
->reg_state
>= NETREG_UNREGISTERED
) {
903 if (filter(ib_dev
, port
, idev
, filter_cookie
))
904 cb(ib_dev
, port
, idev
, cookie
);
912 * ib_enum_all_roce_netdevs - enumerate all RoCE devices
913 * @filter: Should we call the callback?
914 * @filter_cookie: Cookie passed to filter
915 * @cb: Callback to call for each found RoCE ports
916 * @cookie: Cookie passed back to the callback
918 * Enumerates all RoCE devices' physical ports which are related
919 * to netdevices and calls callback() on each device for which
920 * filter() function returns non zero.
922 void ib_enum_all_roce_netdevs(roce_netdev_filter filter
,
924 roce_netdev_callback cb
,
927 struct ib_device
*dev
;
929 down_read(&lists_rwsem
);
930 list_for_each_entry(dev
, &device_list
, core_list
)
931 ib_enum_roce_netdev(dev
, filter
, filter_cookie
, cb
, cookie
);
932 up_read(&lists_rwsem
);
936 * ib_enum_all_devs - enumerate all ib_devices
937 * @cb: Callback to call for each found ib_device
939 * Enumerates all ib_devices and calls callback() on each device.
941 int ib_enum_all_devs(nldev_callback nldev_cb
, struct sk_buff
*skb
,
942 struct netlink_callback
*cb
)
944 struct ib_device
*dev
;
945 unsigned int idx
= 0;
948 down_read(&lists_rwsem
);
949 list_for_each_entry(dev
, &device_list
, core_list
) {
950 ret
= nldev_cb(dev
, skb
, cb
, idx
);
956 up_read(&lists_rwsem
);
961 * ib_query_pkey - Get P_Key table entry
962 * @device:Device to query
963 * @port_num:Port number to query
964 * @index:P_Key table index to query
965 * @pkey:Returned P_Key
967 * ib_query_pkey() fetches the specified P_Key table entry.
969 int ib_query_pkey(struct ib_device
*device
,
970 u8 port_num
, u16 index
, u16
*pkey
)
972 return device
->query_pkey(device
, port_num
, index
, pkey
);
974 EXPORT_SYMBOL(ib_query_pkey
);
977 * ib_modify_device - Change IB device attributes
978 * @device:Device to modify
979 * @device_modify_mask:Mask of attributes to change
980 * @device_modify:New attribute values
982 * ib_modify_device() changes a device's attributes as specified by
983 * the @device_modify_mask and @device_modify structure.
985 int ib_modify_device(struct ib_device
*device
,
986 int device_modify_mask
,
987 struct ib_device_modify
*device_modify
)
989 if (!device
->modify_device
)
992 return device
->modify_device(device
, device_modify_mask
,
995 EXPORT_SYMBOL(ib_modify_device
);
998 * ib_modify_port - Modifies the attributes for the specified port.
999 * @device: The device to modify.
1000 * @port_num: The number of the port to modify.
1001 * @port_modify_mask: Mask used to specify which attributes of the port
1003 * @port_modify: New attribute values for the port.
1005 * ib_modify_port() changes a port's attributes as specified by the
1006 * @port_modify_mask and @port_modify structure.
1008 int ib_modify_port(struct ib_device
*device
,
1009 u8 port_num
, int port_modify_mask
,
1010 struct ib_port_modify
*port_modify
)
1014 if (!rdma_is_port_valid(device
, port_num
))
1017 if (device
->modify_port
)
1018 rc
= device
->modify_port(device
, port_num
, port_modify_mask
,
1021 rc
= rdma_protocol_roce(device
, port_num
) ? 0 : -ENOSYS
;
1024 EXPORT_SYMBOL(ib_modify_port
);
1027 * ib_find_gid - Returns the port number and GID table index where
1028 * a specified GID value occurs.
1029 * @device: The device to query.
1030 * @gid: The GID value to search for.
1031 * @gid_type: Type of GID.
1032 * @ndev: The ndev related to the GID to search for.
1033 * @port_num: The port number of the device where the GID value was found.
1034 * @index: The index into the GID table where the GID was found. This
1035 * parameter may be NULL.
1037 int ib_find_gid(struct ib_device
*device
, union ib_gid
*gid
,
1038 enum ib_gid_type gid_type
, struct net_device
*ndev
,
1039 u8
*port_num
, u16
*index
)
1041 union ib_gid tmp_gid
;
1044 for (port
= rdma_start_port(device
); port
<= rdma_end_port(device
); ++port
) {
1045 if (rdma_cap_roce_gid_table(device
, port
)) {
1046 if (!ib_find_cached_gid_by_port(device
, gid
, gid_type
, port
,
1053 if (gid_type
!= IB_GID_TYPE_IB
)
1056 for (i
= 0; i
< device
->port_immutable
[port
].gid_tbl_len
; ++i
) {
1057 ret
= ib_query_gid(device
, port
, i
, &tmp_gid
, NULL
);
1060 if (!memcmp(&tmp_gid
, gid
, sizeof *gid
)) {
1071 EXPORT_SYMBOL(ib_find_gid
);
1074 * ib_find_pkey - Returns the PKey table index where a specified
1075 * PKey value occurs.
1076 * @device: The device to query.
1077 * @port_num: The port number of the device to search for the PKey.
1078 * @pkey: The PKey value to search for.
1079 * @index: The index into the PKey table where the PKey was found.
1081 int ib_find_pkey(struct ib_device
*device
,
1082 u8 port_num
, u16 pkey
, u16
*index
)
1086 int partial_ix
= -1;
1088 for (i
= 0; i
< device
->port_immutable
[port_num
].pkey_tbl_len
; ++i
) {
1089 ret
= ib_query_pkey(device
, port_num
, i
, &tmp_pkey
);
1092 if ((pkey
& 0x7fff) == (tmp_pkey
& 0x7fff)) {
1093 /* if there is full-member pkey take it.*/
1094 if (tmp_pkey
& 0x8000) {
1103 /*no full-member, if exists take the limited*/
1104 if (partial_ix
>= 0) {
1105 *index
= partial_ix
;
1110 EXPORT_SYMBOL(ib_find_pkey
);
1113 * ib_get_net_dev_by_params() - Return the appropriate net_dev
1114 * for a received CM request
1115 * @dev: An RDMA device on which the request has been received.
1116 * @port: Port number on the RDMA device.
1117 * @pkey: The Pkey the request came on.
1118 * @gid: A GID that the net_dev uses to communicate.
1119 * @addr: Contains the IP address that the request specified as its
1122 struct net_device
*ib_get_net_dev_by_params(struct ib_device
*dev
,
1125 const union ib_gid
*gid
,
1126 const struct sockaddr
*addr
)
1128 struct net_device
*net_dev
= NULL
;
1129 struct ib_client_data
*context
;
1131 if (!rdma_protocol_ib(dev
, port
))
1134 down_read(&lists_rwsem
);
1136 list_for_each_entry(context
, &dev
->client_data_list
, list
) {
1137 struct ib_client
*client
= context
->client
;
1139 if (context
->going_down
)
1142 if (client
->get_net_dev_by_params
) {
1143 net_dev
= client
->get_net_dev_by_params(dev
, port
, pkey
,
1151 up_read(&lists_rwsem
);
1155 EXPORT_SYMBOL(ib_get_net_dev_by_params
);
1157 static const struct rdma_nl_cbs ibnl_ls_cb_table
[RDMA_NL_LS_NUM_OPS
] = {
1158 [RDMA_NL_LS_OP_RESOLVE
] = {
1159 .doit
= ib_nl_handle_resolve_resp
,
1160 .flags
= RDMA_NL_ADMIN_PERM
,
1162 [RDMA_NL_LS_OP_SET_TIMEOUT
] = {
1163 .doit
= ib_nl_handle_set_timeout
,
1164 .flags
= RDMA_NL_ADMIN_PERM
,
1166 [RDMA_NL_LS_OP_IP_RESOLVE
] = {
1167 .doit
= ib_nl_handle_ip_res_resp
,
1168 .flags
= RDMA_NL_ADMIN_PERM
,
1172 static int __init
ib_core_init(void)
1176 ib_wq
= alloc_workqueue("infiniband", 0, 0);
1180 ib_comp_wq
= alloc_workqueue("ib-comp-wq",
1181 WQ_HIGHPRI
| WQ_MEM_RECLAIM
| WQ_SYSFS
, 0);
1187 ret
= class_register(&ib_class
);
1189 pr_warn("Couldn't create InfiniBand device class\n");
1193 ret
= rdma_nl_init();
1195 pr_warn("Couldn't init IB netlink interface: err %d\n", ret
);
1201 pr_warn("Could't init IB address resolution\n");
1205 ret
= ib_mad_init();
1207 pr_warn("Couldn't init IB MAD\n");
1213 pr_warn("Couldn't init SA\n");
1217 ret
= register_lsm_notifier(&ibdev_lsm_nb
);
1219 pr_warn("Couldn't register LSM notifier. ret %d\n", ret
);
1224 rdma_nl_register(RDMA_NL_LS
, ibnl_ls_cb_table
);
1238 class_unregister(&ib_class
);
1240 destroy_workqueue(ib_comp_wq
);
1242 destroy_workqueue(ib_wq
);
1246 static void __exit
ib_core_cleanup(void)
1250 rdma_nl_unregister(RDMA_NL_LS
);
1251 unregister_lsm_notifier(&ibdev_lsm_nb
);
1256 class_unregister(&ib_class
);
1257 destroy_workqueue(ib_comp_wq
);
1258 /* Make sure that any pending umem accounting work is done. */
1259 destroy_workqueue(ib_wq
);
1262 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS
, 4);
1264 subsys_initcall(ib_core_init
);
1265 module_exit(ib_core_cleanup
);