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 static 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
)
149 * Caller is responsible to return refrerence count by calling put_device()
151 struct ib_device
*ib_device_get_by_index(u32 index
)
153 struct ib_device
*device
;
155 down_read(&lists_rwsem
);
156 device
= __ib_device_get_by_index(index
);
158 get_device(&device
->dev
);
160 up_read(&lists_rwsem
);
164 static struct ib_device
*__ib_device_get_by_name(const char *name
)
166 struct ib_device
*device
;
168 list_for_each_entry(device
, &device_list
, core_list
)
169 if (!strncmp(name
, device
->name
, IB_DEVICE_NAME_MAX
))
175 static int alloc_name(char *name
)
177 unsigned long *inuse
;
178 char buf
[IB_DEVICE_NAME_MAX
];
179 struct ib_device
*device
;
182 inuse
= (unsigned long *) get_zeroed_page(GFP_KERNEL
);
186 list_for_each_entry(device
, &device_list
, core_list
) {
187 if (!sscanf(device
->name
, name
, &i
))
189 if (i
< 0 || i
>= PAGE_SIZE
* 8)
191 snprintf(buf
, sizeof buf
, name
, i
);
192 if (!strncmp(buf
, device
->name
, IB_DEVICE_NAME_MAX
))
196 i
= find_first_zero_bit(inuse
, PAGE_SIZE
* 8);
197 free_page((unsigned long) inuse
);
198 snprintf(buf
, sizeof buf
, name
, i
);
200 if (__ib_device_get_by_name(buf
))
203 strlcpy(name
, buf
, IB_DEVICE_NAME_MAX
);
207 static void ib_device_release(struct device
*device
)
209 struct ib_device
*dev
= container_of(device
, struct ib_device
, dev
);
211 WARN_ON(dev
->reg_state
== IB_DEV_REGISTERED
);
212 if (dev
->reg_state
== IB_DEV_UNREGISTERED
) {
214 * In IB_DEV_UNINITIALIZED state, cache or port table
215 * is not even created. Free cache and port table only when
216 * device reaches UNREGISTERED state.
218 ib_cache_release_one(dev
);
219 kfree(dev
->port_immutable
);
224 static int ib_device_uevent(struct device
*device
,
225 struct kobj_uevent_env
*env
)
227 struct ib_device
*dev
= container_of(device
, struct ib_device
, dev
);
229 if (add_uevent_var(env
, "NAME=%s", dev
->name
))
233 * It would be nice to pass the node GUID with the event...
239 static struct class ib_class
= {
240 .name
= "infiniband",
241 .dev_release
= ib_device_release
,
242 .dev_uevent
= ib_device_uevent
,
246 * ib_alloc_device - allocate an IB device struct
247 * @size:size of structure to allocate
249 * Low-level drivers should use ib_alloc_device() to allocate &struct
250 * ib_device. @size is the size of the structure to be allocated,
251 * including any private data used by the low-level driver.
252 * ib_dealloc_device() must be used to free structures allocated with
255 struct ib_device
*ib_alloc_device(size_t size
)
257 struct ib_device
*device
;
259 if (WARN_ON(size
< sizeof(struct ib_device
)))
262 device
= kzalloc(size
, GFP_KERNEL
);
266 device
->dev
.class = &ib_class
;
267 device_initialize(&device
->dev
);
269 dev_set_drvdata(&device
->dev
, device
);
271 INIT_LIST_HEAD(&device
->event_handler_list
);
272 spin_lock_init(&device
->event_handler_lock
);
273 spin_lock_init(&device
->client_data_lock
);
274 INIT_LIST_HEAD(&device
->client_data_list
);
275 INIT_LIST_HEAD(&device
->port_list
);
279 EXPORT_SYMBOL(ib_alloc_device
);
282 * ib_dealloc_device - free an IB device struct
283 * @device:structure to free
285 * Free a structure allocated with ib_alloc_device().
287 void ib_dealloc_device(struct ib_device
*device
)
289 WARN_ON(device
->reg_state
!= IB_DEV_UNREGISTERED
&&
290 device
->reg_state
!= IB_DEV_UNINITIALIZED
);
291 kobject_put(&device
->dev
.kobj
);
293 EXPORT_SYMBOL(ib_dealloc_device
);
295 static int add_client_context(struct ib_device
*device
, struct ib_client
*client
)
297 struct ib_client_data
*context
;
300 context
= kmalloc(sizeof *context
, GFP_KERNEL
);
304 context
->client
= client
;
305 context
->data
= NULL
;
306 context
->going_down
= false;
308 down_write(&lists_rwsem
);
309 spin_lock_irqsave(&device
->client_data_lock
, flags
);
310 list_add(&context
->list
, &device
->client_data_list
);
311 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
312 up_write(&lists_rwsem
);
317 static int verify_immutable(const struct ib_device
*dev
, u8 port
)
319 return WARN_ON(!rdma_cap_ib_mad(dev
, port
) &&
320 rdma_max_mad_size(dev
, port
) != 0);
323 static int read_port_immutable(struct ib_device
*device
)
326 u8 start_port
= rdma_start_port(device
);
327 u8 end_port
= rdma_end_port(device
);
331 * device->port_immutable is indexed directly by the port number to make
332 * access to this data as efficient as possible.
334 * Therefore port_immutable is declared as a 1 based array with
335 * potential empty slots at the beginning.
337 device
->port_immutable
= kzalloc(sizeof(*device
->port_immutable
)
340 if (!device
->port_immutable
)
343 for (port
= start_port
; port
<= end_port
; ++port
) {
344 ret
= device
->get_port_immutable(device
, port
,
345 &device
->port_immutable
[port
]);
349 if (verify_immutable(device
, port
))
355 void ib_get_device_fw_str(struct ib_device
*dev
, char *str
)
357 if (dev
->get_dev_fw_str
)
358 dev
->get_dev_fw_str(dev
, str
);
362 EXPORT_SYMBOL(ib_get_device_fw_str
);
364 static int setup_port_pkey_list(struct ib_device
*device
)
369 * device->port_pkey_list is indexed directly by the port number,
370 * Therefore it is declared as a 1 based array with potential empty
371 * slots at the beginning.
373 device
->port_pkey_list
= kcalloc(rdma_end_port(device
) + 1,
374 sizeof(*device
->port_pkey_list
),
377 if (!device
->port_pkey_list
)
380 for (i
= 0; i
< (rdma_end_port(device
) + 1); i
++) {
381 spin_lock_init(&device
->port_pkey_list
[i
].list_lock
);
382 INIT_LIST_HEAD(&device
->port_pkey_list
[i
].pkey_list
);
388 static void ib_policy_change_task(struct work_struct
*work
)
390 struct ib_device
*dev
;
392 down_read(&lists_rwsem
);
393 list_for_each_entry(dev
, &device_list
, core_list
) {
396 for (i
= rdma_start_port(dev
); i
<= rdma_end_port(dev
); i
++) {
398 int ret
= ib_get_cached_subnet_prefix(dev
,
403 "ib_get_cached_subnet_prefix err: %d, this should never happen here\n",
406 ib_security_cache_change(dev
, i
, sp
);
409 up_read(&lists_rwsem
);
412 static int ib_security_change(struct notifier_block
*nb
, unsigned long event
,
415 if (event
!= LSM_POLICY_CHANGE
)
418 schedule_work(&ib_policy_change_work
);
424 * __dev_new_index - allocate an device index
426 * Returns a suitable unique value for a new device interface
427 * number. It assumes that there are less than 2^32-1 ib devices
428 * will be present in the system.
430 static u32
__dev_new_index(void)
433 * The device index to allow stable naming.
434 * Similar to struct net -> ifindex.
442 if (!__ib_device_get_by_index(index
))
448 * ib_register_device - Register an IB device with IB core
449 * @device:Device to register
451 * Low-level drivers use ib_register_device() to register their
452 * devices with the IB core. All registered clients will receive a
453 * callback for each device that is added. @device must be allocated
454 * with ib_alloc_device().
456 int ib_register_device(struct ib_device
*device
,
457 int (*port_callback
)(struct ib_device
*,
458 u8
, struct kobject
*))
461 struct ib_client
*client
;
462 struct ib_udata uhw
= {.outlen
= 0, .inlen
= 0};
463 struct device
*parent
= device
->dev
.parent
;
465 WARN_ON_ONCE(!parent
);
466 WARN_ON_ONCE(device
->dma_device
);
467 if (device
->dev
.dma_ops
) {
469 * The caller provided custom DMA operations. Copy the
470 * DMA-related fields that are used by e.g. dma_alloc_coherent()
473 device
->dma_device
= &device
->dev
;
474 if (!device
->dev
.dma_mask
)
475 device
->dev
.dma_mask
= parent
->dma_mask
;
476 if (!device
->dev
.coherent_dma_mask
)
477 device
->dev
.coherent_dma_mask
=
478 parent
->coherent_dma_mask
;
481 * The caller did not provide custom DMA operations. Use the
482 * DMA mapping operations of the parent device.
484 device
->dma_device
= parent
;
487 mutex_lock(&device_mutex
);
489 if (strchr(device
->name
, '%')) {
490 ret
= alloc_name(device
->name
);
495 if (ib_device_check_mandatory(device
)) {
500 ret
= read_port_immutable(device
);
502 pr_warn("Couldn't create per port immutable data %s\n",
507 ret
= setup_port_pkey_list(device
);
509 pr_warn("Couldn't create per port_pkey_list\n");
513 ret
= ib_cache_setup_one(device
);
515 pr_warn("Couldn't set up InfiniBand P_Key/GID cache\n");
519 ret
= ib_device_register_rdmacg(device
);
521 pr_warn("Couldn't register device with rdma cgroup\n");
525 memset(&device
->attrs
, 0, sizeof(device
->attrs
));
526 ret
= device
->query_device(device
, &device
->attrs
, &uhw
);
528 pr_warn("Couldn't query the device attributes\n");
532 ret
= ib_device_register_sysfs(device
, port_callback
);
534 pr_warn("Couldn't register device %s with driver model\n",
539 device
->reg_state
= IB_DEV_REGISTERED
;
541 list_for_each_entry(client
, &client_list
, list
)
542 if (!add_client_context(device
, client
) && client
->add
)
545 device
->index
= __dev_new_index();
546 down_write(&lists_rwsem
);
547 list_add_tail(&device
->core_list
, &device_list
);
548 up_write(&lists_rwsem
);
549 mutex_unlock(&device_mutex
);
553 ib_cache_cleanup_one(device
);
554 ib_cache_release_one(device
);
556 kfree(device
->port_immutable
);
558 mutex_unlock(&device_mutex
);
561 EXPORT_SYMBOL(ib_register_device
);
564 * ib_unregister_device - Unregister an IB device
565 * @device:Device to unregister
567 * Unregister an IB device. All clients will receive a remove callback.
569 void ib_unregister_device(struct ib_device
*device
)
571 struct ib_client_data
*context
, *tmp
;
574 mutex_lock(&device_mutex
);
576 down_write(&lists_rwsem
);
577 list_del(&device
->core_list
);
578 spin_lock_irqsave(&device
->client_data_lock
, flags
);
579 list_for_each_entry_safe(context
, tmp
, &device
->client_data_list
, list
)
580 context
->going_down
= true;
581 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
582 downgrade_write(&lists_rwsem
);
584 list_for_each_entry_safe(context
, tmp
, &device
->client_data_list
,
586 if (context
->client
->remove
)
587 context
->client
->remove(device
, context
->data
);
589 up_read(&lists_rwsem
);
591 ib_device_unregister_rdmacg(device
);
592 ib_device_unregister_sysfs(device
);
594 mutex_unlock(&device_mutex
);
596 ib_cache_cleanup_one(device
);
598 ib_security_destroy_port_pkey_list(device
);
599 kfree(device
->port_pkey_list
);
601 down_write(&lists_rwsem
);
602 spin_lock_irqsave(&device
->client_data_lock
, flags
);
603 list_for_each_entry_safe(context
, tmp
, &device
->client_data_list
, list
)
605 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
606 up_write(&lists_rwsem
);
608 device
->reg_state
= IB_DEV_UNREGISTERED
;
610 EXPORT_SYMBOL(ib_unregister_device
);
613 * ib_register_client - Register an IB client
614 * @client:Client to register
616 * Upper level users of the IB drivers can use ib_register_client() to
617 * register callbacks for IB device addition and removal. When an IB
618 * device is added, each registered client's add method will be called
619 * (in the order the clients were registered), and when a device is
620 * removed, each client's remove method will be called (in the reverse
621 * order that clients were registered). In addition, when
622 * ib_register_client() is called, the client will receive an add
623 * callback for all devices already registered.
625 int ib_register_client(struct ib_client
*client
)
627 struct ib_device
*device
;
629 mutex_lock(&device_mutex
);
631 list_for_each_entry(device
, &device_list
, core_list
)
632 if (!add_client_context(device
, client
) && client
->add
)
635 down_write(&lists_rwsem
);
636 list_add_tail(&client
->list
, &client_list
);
637 up_write(&lists_rwsem
);
639 mutex_unlock(&device_mutex
);
643 EXPORT_SYMBOL(ib_register_client
);
646 * ib_unregister_client - Unregister an IB client
647 * @client:Client to unregister
649 * Upper level users use ib_unregister_client() to remove their client
650 * registration. When ib_unregister_client() is called, the client
651 * will receive a remove callback for each IB device still registered.
653 void ib_unregister_client(struct ib_client
*client
)
655 struct ib_client_data
*context
, *tmp
;
656 struct ib_device
*device
;
659 mutex_lock(&device_mutex
);
661 down_write(&lists_rwsem
);
662 list_del(&client
->list
);
663 up_write(&lists_rwsem
);
665 list_for_each_entry(device
, &device_list
, core_list
) {
666 struct ib_client_data
*found_context
= NULL
;
668 down_write(&lists_rwsem
);
669 spin_lock_irqsave(&device
->client_data_lock
, flags
);
670 list_for_each_entry_safe(context
, tmp
, &device
->client_data_list
, list
)
671 if (context
->client
== client
) {
672 context
->going_down
= true;
673 found_context
= context
;
676 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
677 up_write(&lists_rwsem
);
680 client
->remove(device
, found_context
?
681 found_context
->data
: NULL
);
683 if (!found_context
) {
684 pr_warn("No client context found for %s/%s\n",
685 device
->name
, client
->name
);
689 down_write(&lists_rwsem
);
690 spin_lock_irqsave(&device
->client_data_lock
, flags
);
691 list_del(&found_context
->list
);
692 kfree(found_context
);
693 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
694 up_write(&lists_rwsem
);
697 mutex_unlock(&device_mutex
);
699 EXPORT_SYMBOL(ib_unregister_client
);
702 * ib_get_client_data - Get IB client context
703 * @device:Device to get context for
704 * @client:Client to get context for
706 * ib_get_client_data() returns client context set with
707 * ib_set_client_data().
709 void *ib_get_client_data(struct ib_device
*device
, struct ib_client
*client
)
711 struct ib_client_data
*context
;
715 spin_lock_irqsave(&device
->client_data_lock
, flags
);
716 list_for_each_entry(context
, &device
->client_data_list
, list
)
717 if (context
->client
== client
) {
721 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
725 EXPORT_SYMBOL(ib_get_client_data
);
728 * ib_set_client_data - Set IB client context
729 * @device:Device to set context for
730 * @client:Client to set context for
731 * @data:Context to set
733 * ib_set_client_data() sets client context that can be retrieved with
734 * ib_get_client_data().
736 void ib_set_client_data(struct ib_device
*device
, struct ib_client
*client
,
739 struct ib_client_data
*context
;
742 spin_lock_irqsave(&device
->client_data_lock
, flags
);
743 list_for_each_entry(context
, &device
->client_data_list
, list
)
744 if (context
->client
== client
) {
745 context
->data
= data
;
749 pr_warn("No client context found for %s/%s\n",
750 device
->name
, client
->name
);
753 spin_unlock_irqrestore(&device
->client_data_lock
, flags
);
755 EXPORT_SYMBOL(ib_set_client_data
);
758 * ib_register_event_handler - Register an IB event handler
759 * @event_handler:Handler to register
761 * ib_register_event_handler() registers an event handler that will be
762 * called back when asynchronous IB events occur (as defined in
763 * chapter 11 of the InfiniBand Architecture Specification). This
764 * callback may occur in interrupt context.
766 void ib_register_event_handler(struct ib_event_handler
*event_handler
)
770 spin_lock_irqsave(&event_handler
->device
->event_handler_lock
, flags
);
771 list_add_tail(&event_handler
->list
,
772 &event_handler
->device
->event_handler_list
);
773 spin_unlock_irqrestore(&event_handler
->device
->event_handler_lock
, flags
);
775 EXPORT_SYMBOL(ib_register_event_handler
);
778 * ib_unregister_event_handler - Unregister an event handler
779 * @event_handler:Handler to unregister
781 * Unregister an event handler registered with
782 * ib_register_event_handler().
784 void ib_unregister_event_handler(struct ib_event_handler
*event_handler
)
788 spin_lock_irqsave(&event_handler
->device
->event_handler_lock
, flags
);
789 list_del(&event_handler
->list
);
790 spin_unlock_irqrestore(&event_handler
->device
->event_handler_lock
, flags
);
792 EXPORT_SYMBOL(ib_unregister_event_handler
);
795 * ib_dispatch_event - Dispatch an asynchronous event
796 * @event:Event to dispatch
798 * Low-level drivers must call ib_dispatch_event() to dispatch the
799 * event to all registered event handlers when an asynchronous event
802 void ib_dispatch_event(struct ib_event
*event
)
805 struct ib_event_handler
*handler
;
807 spin_lock_irqsave(&event
->device
->event_handler_lock
, flags
);
809 list_for_each_entry(handler
, &event
->device
->event_handler_list
, list
)
810 handler
->handler(handler
, event
);
812 spin_unlock_irqrestore(&event
->device
->event_handler_lock
, flags
);
814 EXPORT_SYMBOL(ib_dispatch_event
);
817 * ib_query_port - Query IB port attributes
818 * @device:Device to query
819 * @port_num:Port number to query
820 * @port_attr:Port attributes
822 * ib_query_port() returns the attributes of a port through the
823 * @port_attr pointer.
825 int ib_query_port(struct ib_device
*device
,
827 struct ib_port_attr
*port_attr
)
832 if (!rdma_is_port_valid(device
, port_num
))
835 memset(port_attr
, 0, sizeof(*port_attr
));
836 err
= device
->query_port(device
, port_num
, port_attr
);
837 if (err
|| port_attr
->subnet_prefix
)
840 if (rdma_port_get_link_layer(device
, port_num
) != IB_LINK_LAYER_INFINIBAND
)
843 err
= ib_query_gid(device
, port_num
, 0, &gid
, NULL
);
847 port_attr
->subnet_prefix
= be64_to_cpu(gid
.global
.subnet_prefix
);
850 EXPORT_SYMBOL(ib_query_port
);
853 * ib_query_gid - Get GID table entry
854 * @device:Device to query
855 * @port_num:Port number to query
856 * @index:GID table index to query
858 * @attr: Returned GID attributes related to this GID index (only in RoCE).
861 * ib_query_gid() fetches the specified GID table entry.
863 int ib_query_gid(struct ib_device
*device
,
864 u8 port_num
, int index
, union ib_gid
*gid
,
865 struct ib_gid_attr
*attr
)
867 if (rdma_cap_roce_gid_table(device
, port_num
))
868 return ib_get_cached_gid(device
, port_num
, index
, gid
, attr
);
873 return device
->query_gid(device
, port_num
, index
, gid
);
875 EXPORT_SYMBOL(ib_query_gid
);
878 * ib_enum_roce_netdev - enumerate all RoCE ports
879 * @ib_dev : IB device we want to query
880 * @filter: Should we call the callback?
881 * @filter_cookie: Cookie passed to filter
882 * @cb: Callback to call for each found RoCE ports
883 * @cookie: Cookie passed back to the callback
885 * Enumerates all of the physical RoCE ports of ib_dev
886 * which are related to netdevice and calls callback() on each
887 * device for which filter() function returns non zero.
889 void ib_enum_roce_netdev(struct ib_device
*ib_dev
,
890 roce_netdev_filter filter
,
892 roce_netdev_callback cb
,
897 for (port
= rdma_start_port(ib_dev
); port
<= rdma_end_port(ib_dev
);
899 if (rdma_protocol_roce(ib_dev
, port
)) {
900 struct net_device
*idev
= NULL
;
902 if (ib_dev
->get_netdev
)
903 idev
= ib_dev
->get_netdev(ib_dev
, port
);
906 idev
->reg_state
>= NETREG_UNREGISTERED
) {
911 if (filter(ib_dev
, port
, idev
, filter_cookie
))
912 cb(ib_dev
, port
, idev
, cookie
);
920 * ib_enum_all_roce_netdevs - enumerate all RoCE devices
921 * @filter: Should we call the callback?
922 * @filter_cookie: Cookie passed to filter
923 * @cb: Callback to call for each found RoCE ports
924 * @cookie: Cookie passed back to the callback
926 * Enumerates all RoCE devices' physical ports which are related
927 * to netdevices and calls callback() on each device for which
928 * filter() function returns non zero.
930 void ib_enum_all_roce_netdevs(roce_netdev_filter filter
,
932 roce_netdev_callback cb
,
935 struct ib_device
*dev
;
937 down_read(&lists_rwsem
);
938 list_for_each_entry(dev
, &device_list
, core_list
)
939 ib_enum_roce_netdev(dev
, filter
, filter_cookie
, cb
, cookie
);
940 up_read(&lists_rwsem
);
944 * ib_enum_all_devs - enumerate all ib_devices
945 * @cb: Callback to call for each found ib_device
947 * Enumerates all ib_devices and calls callback() on each device.
949 int ib_enum_all_devs(nldev_callback nldev_cb
, struct sk_buff
*skb
,
950 struct netlink_callback
*cb
)
952 struct ib_device
*dev
;
953 unsigned int idx
= 0;
956 down_read(&lists_rwsem
);
957 list_for_each_entry(dev
, &device_list
, core_list
) {
958 ret
= nldev_cb(dev
, skb
, cb
, idx
);
964 up_read(&lists_rwsem
);
969 * ib_query_pkey - Get P_Key table entry
970 * @device:Device to query
971 * @port_num:Port number to query
972 * @index:P_Key table index to query
973 * @pkey:Returned P_Key
975 * ib_query_pkey() fetches the specified P_Key table entry.
977 int ib_query_pkey(struct ib_device
*device
,
978 u8 port_num
, u16 index
, u16
*pkey
)
980 return device
->query_pkey(device
, port_num
, index
, pkey
);
982 EXPORT_SYMBOL(ib_query_pkey
);
985 * ib_modify_device - Change IB device attributes
986 * @device:Device to modify
987 * @device_modify_mask:Mask of attributes to change
988 * @device_modify:New attribute values
990 * ib_modify_device() changes a device's attributes as specified by
991 * the @device_modify_mask and @device_modify structure.
993 int ib_modify_device(struct ib_device
*device
,
994 int device_modify_mask
,
995 struct ib_device_modify
*device_modify
)
997 if (!device
->modify_device
)
1000 return device
->modify_device(device
, device_modify_mask
,
1003 EXPORT_SYMBOL(ib_modify_device
);
1006 * ib_modify_port - Modifies the attributes for the specified port.
1007 * @device: The device to modify.
1008 * @port_num: The number of the port to modify.
1009 * @port_modify_mask: Mask used to specify which attributes of the port
1011 * @port_modify: New attribute values for the port.
1013 * ib_modify_port() changes a port's attributes as specified by the
1014 * @port_modify_mask and @port_modify structure.
1016 int ib_modify_port(struct ib_device
*device
,
1017 u8 port_num
, int port_modify_mask
,
1018 struct ib_port_modify
*port_modify
)
1022 if (!rdma_is_port_valid(device
, port_num
))
1025 if (device
->modify_port
)
1026 rc
= device
->modify_port(device
, port_num
, port_modify_mask
,
1029 rc
= rdma_protocol_roce(device
, port_num
) ? 0 : -ENOSYS
;
1032 EXPORT_SYMBOL(ib_modify_port
);
1035 * ib_find_gid - Returns the port number and GID table index where
1036 * a specified GID value occurs.
1037 * @device: The device to query.
1038 * @gid: The GID value to search for.
1039 * @gid_type: Type of GID.
1040 * @ndev: The ndev related to the GID to search for.
1041 * @port_num: The port number of the device where the GID value was found.
1042 * @index: The index into the GID table where the GID was found. This
1043 * parameter may be NULL.
1045 int ib_find_gid(struct ib_device
*device
, union ib_gid
*gid
,
1046 enum ib_gid_type gid_type
, struct net_device
*ndev
,
1047 u8
*port_num
, u16
*index
)
1049 union ib_gid tmp_gid
;
1052 for (port
= rdma_start_port(device
); port
<= rdma_end_port(device
); ++port
) {
1053 if (rdma_cap_roce_gid_table(device
, port
)) {
1054 if (!ib_find_cached_gid_by_port(device
, gid
, gid_type
, port
,
1061 if (gid_type
!= IB_GID_TYPE_IB
)
1064 for (i
= 0; i
< device
->port_immutable
[port
].gid_tbl_len
; ++i
) {
1065 ret
= ib_query_gid(device
, port
, i
, &tmp_gid
, NULL
);
1068 if (!memcmp(&tmp_gid
, gid
, sizeof *gid
)) {
1079 EXPORT_SYMBOL(ib_find_gid
);
1082 * ib_find_pkey - Returns the PKey table index where a specified
1083 * PKey value occurs.
1084 * @device: The device to query.
1085 * @port_num: The port number of the device to search for the PKey.
1086 * @pkey: The PKey value to search for.
1087 * @index: The index into the PKey table where the PKey was found.
1089 int ib_find_pkey(struct ib_device
*device
,
1090 u8 port_num
, u16 pkey
, u16
*index
)
1094 int partial_ix
= -1;
1096 for (i
= 0; i
< device
->port_immutable
[port_num
].pkey_tbl_len
; ++i
) {
1097 ret
= ib_query_pkey(device
, port_num
, i
, &tmp_pkey
);
1100 if ((pkey
& 0x7fff) == (tmp_pkey
& 0x7fff)) {
1101 /* if there is full-member pkey take it.*/
1102 if (tmp_pkey
& 0x8000) {
1111 /*no full-member, if exists take the limited*/
1112 if (partial_ix
>= 0) {
1113 *index
= partial_ix
;
1118 EXPORT_SYMBOL(ib_find_pkey
);
1121 * ib_get_net_dev_by_params() - Return the appropriate net_dev
1122 * for a received CM request
1123 * @dev: An RDMA device on which the request has been received.
1124 * @port: Port number on the RDMA device.
1125 * @pkey: The Pkey the request came on.
1126 * @gid: A GID that the net_dev uses to communicate.
1127 * @addr: Contains the IP address that the request specified as its
1130 struct net_device
*ib_get_net_dev_by_params(struct ib_device
*dev
,
1133 const union ib_gid
*gid
,
1134 const struct sockaddr
*addr
)
1136 struct net_device
*net_dev
= NULL
;
1137 struct ib_client_data
*context
;
1139 if (!rdma_protocol_ib(dev
, port
))
1142 down_read(&lists_rwsem
);
1144 list_for_each_entry(context
, &dev
->client_data_list
, list
) {
1145 struct ib_client
*client
= context
->client
;
1147 if (context
->going_down
)
1150 if (client
->get_net_dev_by_params
) {
1151 net_dev
= client
->get_net_dev_by_params(dev
, port
, pkey
,
1159 up_read(&lists_rwsem
);
1163 EXPORT_SYMBOL(ib_get_net_dev_by_params
);
1165 static const struct rdma_nl_cbs ibnl_ls_cb_table
[RDMA_NL_LS_NUM_OPS
] = {
1166 [RDMA_NL_LS_OP_RESOLVE
] = {
1167 .doit
= ib_nl_handle_resolve_resp
,
1168 .flags
= RDMA_NL_ADMIN_PERM
,
1170 [RDMA_NL_LS_OP_SET_TIMEOUT
] = {
1171 .doit
= ib_nl_handle_set_timeout
,
1172 .flags
= RDMA_NL_ADMIN_PERM
,
1174 [RDMA_NL_LS_OP_IP_RESOLVE
] = {
1175 .doit
= ib_nl_handle_ip_res_resp
,
1176 .flags
= RDMA_NL_ADMIN_PERM
,
1180 static int __init
ib_core_init(void)
1184 ib_wq
= alloc_workqueue("infiniband", 0, 0);
1188 ib_comp_wq
= alloc_workqueue("ib-comp-wq",
1189 WQ_HIGHPRI
| WQ_MEM_RECLAIM
| WQ_SYSFS
, 0);
1195 ret
= class_register(&ib_class
);
1197 pr_warn("Couldn't create InfiniBand device class\n");
1201 ret
= rdma_nl_init();
1203 pr_warn("Couldn't init IB netlink interface: err %d\n", ret
);
1209 pr_warn("Could't init IB address resolution\n");
1213 ret
= ib_mad_init();
1215 pr_warn("Couldn't init IB MAD\n");
1221 pr_warn("Couldn't init SA\n");
1225 ret
= register_lsm_notifier(&ibdev_lsm_nb
);
1227 pr_warn("Couldn't register LSM notifier. ret %d\n", ret
);
1232 rdma_nl_register(RDMA_NL_LS
, ibnl_ls_cb_table
);
1246 class_unregister(&ib_class
);
1248 destroy_workqueue(ib_comp_wq
);
1250 destroy_workqueue(ib_wq
);
1254 static void __exit
ib_core_cleanup(void)
1258 rdma_nl_unregister(RDMA_NL_LS
);
1259 unregister_lsm_notifier(&ibdev_lsm_nb
);
1264 class_unregister(&ib_class
);
1265 destroy_workqueue(ib_comp_wq
);
1266 /* Make sure that any pending umem accounting work is done. */
1267 destroy_workqueue(ib_wq
);
1270 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS
, 4);
1272 subsys_initcall(ib_core_init
);
1273 module_exit(ib_core_cleanup
);