xref: /openbmc/linux/drivers/infiniband/core/device.c (revision b6dcefde)
1 /*
2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4  *
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:
10  *
11  *     Redistribution and use in source and binary forms, with or
12  *     without modification, are permitted provided that the following
13  *     conditions are met:
14  *
15  *      - Redistributions of source code must retain the above
16  *        copyright notice, this list of conditions and the following
17  *        disclaimer.
18  *
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.
23  *
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
31  * SOFTWARE.
32  */
33 
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/workqueue.h>
42 
43 #include "core_priv.h"
44 
45 MODULE_AUTHOR("Roland Dreier");
46 MODULE_DESCRIPTION("core kernel InfiniBand API");
47 MODULE_LICENSE("Dual BSD/GPL");
48 
49 struct ib_client_data {
50 	struct list_head  list;
51 	struct ib_client *client;
52 	void *            data;
53 };
54 
55 static LIST_HEAD(device_list);
56 static LIST_HEAD(client_list);
57 
58 /*
59  * device_mutex protects access to both device_list and client_list.
60  * There's no real point to using multiple locks or something fancier
61  * like an rwsem: we always access both lists, and we're always
62  * modifying one list or the other list.  In any case this is not a
63  * hot path so there's no point in trying to optimize.
64  */
65 static DEFINE_MUTEX(device_mutex);
66 
67 static int ib_device_check_mandatory(struct ib_device *device)
68 {
69 #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x }
70 	static const struct {
71 		size_t offset;
72 		char  *name;
73 	} mandatory_table[] = {
74 		IB_MANDATORY_FUNC(query_device),
75 		IB_MANDATORY_FUNC(query_port),
76 		IB_MANDATORY_FUNC(query_pkey),
77 		IB_MANDATORY_FUNC(query_gid),
78 		IB_MANDATORY_FUNC(alloc_pd),
79 		IB_MANDATORY_FUNC(dealloc_pd),
80 		IB_MANDATORY_FUNC(create_ah),
81 		IB_MANDATORY_FUNC(destroy_ah),
82 		IB_MANDATORY_FUNC(create_qp),
83 		IB_MANDATORY_FUNC(modify_qp),
84 		IB_MANDATORY_FUNC(destroy_qp),
85 		IB_MANDATORY_FUNC(post_send),
86 		IB_MANDATORY_FUNC(post_recv),
87 		IB_MANDATORY_FUNC(create_cq),
88 		IB_MANDATORY_FUNC(destroy_cq),
89 		IB_MANDATORY_FUNC(poll_cq),
90 		IB_MANDATORY_FUNC(req_notify_cq),
91 		IB_MANDATORY_FUNC(get_dma_mr),
92 		IB_MANDATORY_FUNC(dereg_mr)
93 	};
94 	int i;
95 
96 	for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) {
97 		if (!*(void **) ((void *) device + mandatory_table[i].offset)) {
98 			printk(KERN_WARNING "Device %s is missing mandatory function %s\n",
99 			       device->name, mandatory_table[i].name);
100 			return -EINVAL;
101 		}
102 	}
103 
104 	return 0;
105 }
106 
107 static struct ib_device *__ib_device_get_by_name(const char *name)
108 {
109 	struct ib_device *device;
110 
111 	list_for_each_entry(device, &device_list, core_list)
112 		if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX))
113 			return device;
114 
115 	return NULL;
116 }
117 
118 
119 static int alloc_name(char *name)
120 {
121 	unsigned long *inuse;
122 	char buf[IB_DEVICE_NAME_MAX];
123 	struct ib_device *device;
124 	int i;
125 
126 	inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL);
127 	if (!inuse)
128 		return -ENOMEM;
129 
130 	list_for_each_entry(device, &device_list, core_list) {
131 		if (!sscanf(device->name, name, &i))
132 			continue;
133 		if (i < 0 || i >= PAGE_SIZE * 8)
134 			continue;
135 		snprintf(buf, sizeof buf, name, i);
136 		if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX))
137 			set_bit(i, inuse);
138 	}
139 
140 	i = find_first_zero_bit(inuse, PAGE_SIZE * 8);
141 	free_page((unsigned long) inuse);
142 	snprintf(buf, sizeof buf, name, i);
143 
144 	if (__ib_device_get_by_name(buf))
145 		return -ENFILE;
146 
147 	strlcpy(name, buf, IB_DEVICE_NAME_MAX);
148 	return 0;
149 }
150 
151 static int start_port(struct ib_device *device)
152 {
153 	return (device->node_type == RDMA_NODE_IB_SWITCH) ? 0 : 1;
154 }
155 
156 
157 static int end_port(struct ib_device *device)
158 {
159 	return (device->node_type == RDMA_NODE_IB_SWITCH) ?
160 		0 : device->phys_port_cnt;
161 }
162 
163 /**
164  * ib_alloc_device - allocate an IB device struct
165  * @size:size of structure to allocate
166  *
167  * Low-level drivers should use ib_alloc_device() to allocate &struct
168  * ib_device.  @size is the size of the structure to be allocated,
169  * including any private data used by the low-level driver.
170  * ib_dealloc_device() must be used to free structures allocated with
171  * ib_alloc_device().
172  */
173 struct ib_device *ib_alloc_device(size_t size)
174 {
175 	BUG_ON(size < sizeof (struct ib_device));
176 
177 	return kzalloc(size, GFP_KERNEL);
178 }
179 EXPORT_SYMBOL(ib_alloc_device);
180 
181 /**
182  * ib_dealloc_device - free an IB device struct
183  * @device:structure to free
184  *
185  * Free a structure allocated with ib_alloc_device().
186  */
187 void ib_dealloc_device(struct ib_device *device)
188 {
189 	if (device->reg_state == IB_DEV_UNINITIALIZED) {
190 		kfree(device);
191 		return;
192 	}
193 
194 	BUG_ON(device->reg_state != IB_DEV_UNREGISTERED);
195 
196 	kobject_put(&device->dev.kobj);
197 }
198 EXPORT_SYMBOL(ib_dealloc_device);
199 
200 static int add_client_context(struct ib_device *device, struct ib_client *client)
201 {
202 	struct ib_client_data *context;
203 	unsigned long flags;
204 
205 	context = kmalloc(sizeof *context, GFP_KERNEL);
206 	if (!context) {
207 		printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n",
208 		       device->name, client->name);
209 		return -ENOMEM;
210 	}
211 
212 	context->client = client;
213 	context->data   = NULL;
214 
215 	spin_lock_irqsave(&device->client_data_lock, flags);
216 	list_add(&context->list, &device->client_data_list);
217 	spin_unlock_irqrestore(&device->client_data_lock, flags);
218 
219 	return 0;
220 }
221 
222 static int read_port_table_lengths(struct ib_device *device)
223 {
224 	struct ib_port_attr *tprops = NULL;
225 	int num_ports, ret = -ENOMEM;
226 	u8 port_index;
227 
228 	tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
229 	if (!tprops)
230 		goto out;
231 
232 	num_ports = end_port(device) - start_port(device) + 1;
233 
234 	device->pkey_tbl_len = kmalloc(sizeof *device->pkey_tbl_len * num_ports,
235 				       GFP_KERNEL);
236 	device->gid_tbl_len = kmalloc(sizeof *device->gid_tbl_len * num_ports,
237 				      GFP_KERNEL);
238 	if (!device->pkey_tbl_len || !device->gid_tbl_len)
239 		goto err;
240 
241 	for (port_index = 0; port_index < num_ports; ++port_index) {
242 		ret = ib_query_port(device, port_index + start_port(device),
243 					tprops);
244 		if (ret)
245 			goto err;
246 		device->pkey_tbl_len[port_index] = tprops->pkey_tbl_len;
247 		device->gid_tbl_len[port_index]  = tprops->gid_tbl_len;
248 	}
249 
250 	ret = 0;
251 	goto out;
252 
253 err:
254 	kfree(device->gid_tbl_len);
255 	kfree(device->pkey_tbl_len);
256 out:
257 	kfree(tprops);
258 	return ret;
259 }
260 
261 /**
262  * ib_register_device - Register an IB device with IB core
263  * @device:Device to register
264  *
265  * Low-level drivers use ib_register_device() to register their
266  * devices with the IB core.  All registered clients will receive a
267  * callback for each device that is added. @device must be allocated
268  * with ib_alloc_device().
269  */
270 int ib_register_device(struct ib_device *device)
271 {
272 	int ret;
273 
274 	mutex_lock(&device_mutex);
275 
276 	if (strchr(device->name, '%')) {
277 		ret = alloc_name(device->name);
278 		if (ret)
279 			goto out;
280 	}
281 
282 	if (ib_device_check_mandatory(device)) {
283 		ret = -EINVAL;
284 		goto out;
285 	}
286 
287 	INIT_LIST_HEAD(&device->event_handler_list);
288 	INIT_LIST_HEAD(&device->client_data_list);
289 	spin_lock_init(&device->event_handler_lock);
290 	spin_lock_init(&device->client_data_lock);
291 
292 	ret = read_port_table_lengths(device);
293 	if (ret) {
294 		printk(KERN_WARNING "Couldn't create table lengths cache for device %s\n",
295 		       device->name);
296 		goto out;
297 	}
298 
299 	ret = ib_device_register_sysfs(device);
300 	if (ret) {
301 		printk(KERN_WARNING "Couldn't register device %s with driver model\n",
302 		       device->name);
303 		kfree(device->gid_tbl_len);
304 		kfree(device->pkey_tbl_len);
305 		goto out;
306 	}
307 
308 	list_add_tail(&device->core_list, &device_list);
309 
310 	device->reg_state = IB_DEV_REGISTERED;
311 
312 	{
313 		struct ib_client *client;
314 
315 		list_for_each_entry(client, &client_list, list)
316 			if (client->add && !add_client_context(device, client))
317 				client->add(device);
318 	}
319 
320  out:
321 	mutex_unlock(&device_mutex);
322 	return ret;
323 }
324 EXPORT_SYMBOL(ib_register_device);
325 
326 /**
327  * ib_unregister_device - Unregister an IB device
328  * @device:Device to unregister
329  *
330  * Unregister an IB device.  All clients will receive a remove callback.
331  */
332 void ib_unregister_device(struct ib_device *device)
333 {
334 	struct ib_client *client;
335 	struct ib_client_data *context, *tmp;
336 	unsigned long flags;
337 
338 	mutex_lock(&device_mutex);
339 
340 	list_for_each_entry_reverse(client, &client_list, list)
341 		if (client->remove)
342 			client->remove(device);
343 
344 	list_del(&device->core_list);
345 
346 	kfree(device->gid_tbl_len);
347 	kfree(device->pkey_tbl_len);
348 
349 	mutex_unlock(&device_mutex);
350 
351 	ib_device_unregister_sysfs(device);
352 
353 	spin_lock_irqsave(&device->client_data_lock, flags);
354 	list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
355 		kfree(context);
356 	spin_unlock_irqrestore(&device->client_data_lock, flags);
357 
358 	device->reg_state = IB_DEV_UNREGISTERED;
359 }
360 EXPORT_SYMBOL(ib_unregister_device);
361 
362 /**
363  * ib_register_client - Register an IB client
364  * @client:Client to register
365  *
366  * Upper level users of the IB drivers can use ib_register_client() to
367  * register callbacks for IB device addition and removal.  When an IB
368  * device is added, each registered client's add method will be called
369  * (in the order the clients were registered), and when a device is
370  * removed, each client's remove method will be called (in the reverse
371  * order that clients were registered).  In addition, when
372  * ib_register_client() is called, the client will receive an add
373  * callback for all devices already registered.
374  */
375 int ib_register_client(struct ib_client *client)
376 {
377 	struct ib_device *device;
378 
379 	mutex_lock(&device_mutex);
380 
381 	list_add_tail(&client->list, &client_list);
382 	list_for_each_entry(device, &device_list, core_list)
383 		if (client->add && !add_client_context(device, client))
384 			client->add(device);
385 
386 	mutex_unlock(&device_mutex);
387 
388 	return 0;
389 }
390 EXPORT_SYMBOL(ib_register_client);
391 
392 /**
393  * ib_unregister_client - Unregister an IB client
394  * @client:Client to unregister
395  *
396  * Upper level users use ib_unregister_client() to remove their client
397  * registration.  When ib_unregister_client() is called, the client
398  * will receive a remove callback for each IB device still registered.
399  */
400 void ib_unregister_client(struct ib_client *client)
401 {
402 	struct ib_client_data *context, *tmp;
403 	struct ib_device *device;
404 	unsigned long flags;
405 
406 	mutex_lock(&device_mutex);
407 
408 	list_for_each_entry(device, &device_list, core_list) {
409 		if (client->remove)
410 			client->remove(device);
411 
412 		spin_lock_irqsave(&device->client_data_lock, flags);
413 		list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
414 			if (context->client == client) {
415 				list_del(&context->list);
416 				kfree(context);
417 			}
418 		spin_unlock_irqrestore(&device->client_data_lock, flags);
419 	}
420 	list_del(&client->list);
421 
422 	mutex_unlock(&device_mutex);
423 }
424 EXPORT_SYMBOL(ib_unregister_client);
425 
426 /**
427  * ib_get_client_data - Get IB client context
428  * @device:Device to get context for
429  * @client:Client to get context for
430  *
431  * ib_get_client_data() returns client context set with
432  * ib_set_client_data().
433  */
434 void *ib_get_client_data(struct ib_device *device, struct ib_client *client)
435 {
436 	struct ib_client_data *context;
437 	void *ret = NULL;
438 	unsigned long flags;
439 
440 	spin_lock_irqsave(&device->client_data_lock, flags);
441 	list_for_each_entry(context, &device->client_data_list, list)
442 		if (context->client == client) {
443 			ret = context->data;
444 			break;
445 		}
446 	spin_unlock_irqrestore(&device->client_data_lock, flags);
447 
448 	return ret;
449 }
450 EXPORT_SYMBOL(ib_get_client_data);
451 
452 /**
453  * ib_set_client_data - Set IB client context
454  * @device:Device to set context for
455  * @client:Client to set context for
456  * @data:Context to set
457  *
458  * ib_set_client_data() sets client context that can be retrieved with
459  * ib_get_client_data().
460  */
461 void ib_set_client_data(struct ib_device *device, struct ib_client *client,
462 			void *data)
463 {
464 	struct ib_client_data *context;
465 	unsigned long flags;
466 
467 	spin_lock_irqsave(&device->client_data_lock, flags);
468 	list_for_each_entry(context, &device->client_data_list, list)
469 		if (context->client == client) {
470 			context->data = data;
471 			goto out;
472 		}
473 
474 	printk(KERN_WARNING "No client context found for %s/%s\n",
475 	       device->name, client->name);
476 
477 out:
478 	spin_unlock_irqrestore(&device->client_data_lock, flags);
479 }
480 EXPORT_SYMBOL(ib_set_client_data);
481 
482 /**
483  * ib_register_event_handler - Register an IB event handler
484  * @event_handler:Handler to register
485  *
486  * ib_register_event_handler() registers an event handler that will be
487  * called back when asynchronous IB events occur (as defined in
488  * chapter 11 of the InfiniBand Architecture Specification).  This
489  * callback may occur in interrupt context.
490  */
491 int ib_register_event_handler  (struct ib_event_handler *event_handler)
492 {
493 	unsigned long flags;
494 
495 	spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
496 	list_add_tail(&event_handler->list,
497 		      &event_handler->device->event_handler_list);
498 	spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
499 
500 	return 0;
501 }
502 EXPORT_SYMBOL(ib_register_event_handler);
503 
504 /**
505  * ib_unregister_event_handler - Unregister an event handler
506  * @event_handler:Handler to unregister
507  *
508  * Unregister an event handler registered with
509  * ib_register_event_handler().
510  */
511 int ib_unregister_event_handler(struct ib_event_handler *event_handler)
512 {
513 	unsigned long flags;
514 
515 	spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
516 	list_del(&event_handler->list);
517 	spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
518 
519 	return 0;
520 }
521 EXPORT_SYMBOL(ib_unregister_event_handler);
522 
523 /**
524  * ib_dispatch_event - Dispatch an asynchronous event
525  * @event:Event to dispatch
526  *
527  * Low-level drivers must call ib_dispatch_event() to dispatch the
528  * event to all registered event handlers when an asynchronous event
529  * occurs.
530  */
531 void ib_dispatch_event(struct ib_event *event)
532 {
533 	unsigned long flags;
534 	struct ib_event_handler *handler;
535 
536 	spin_lock_irqsave(&event->device->event_handler_lock, flags);
537 
538 	list_for_each_entry(handler, &event->device->event_handler_list, list)
539 		handler->handler(handler, event);
540 
541 	spin_unlock_irqrestore(&event->device->event_handler_lock, flags);
542 }
543 EXPORT_SYMBOL(ib_dispatch_event);
544 
545 /**
546  * ib_query_device - Query IB device attributes
547  * @device:Device to query
548  * @device_attr:Device attributes
549  *
550  * ib_query_device() returns the attributes of a device through the
551  * @device_attr pointer.
552  */
553 int ib_query_device(struct ib_device *device,
554 		    struct ib_device_attr *device_attr)
555 {
556 	return device->query_device(device, device_attr);
557 }
558 EXPORT_SYMBOL(ib_query_device);
559 
560 /**
561  * ib_query_port - Query IB port attributes
562  * @device:Device to query
563  * @port_num:Port number to query
564  * @port_attr:Port attributes
565  *
566  * ib_query_port() returns the attributes of a port through the
567  * @port_attr pointer.
568  */
569 int ib_query_port(struct ib_device *device,
570 		  u8 port_num,
571 		  struct ib_port_attr *port_attr)
572 {
573 	if (port_num < start_port(device) || port_num > end_port(device))
574 		return -EINVAL;
575 
576 	return device->query_port(device, port_num, port_attr);
577 }
578 EXPORT_SYMBOL(ib_query_port);
579 
580 /**
581  * ib_query_gid - Get GID table entry
582  * @device:Device to query
583  * @port_num:Port number to query
584  * @index:GID table index to query
585  * @gid:Returned GID
586  *
587  * ib_query_gid() fetches the specified GID table entry.
588  */
589 int ib_query_gid(struct ib_device *device,
590 		 u8 port_num, int index, union ib_gid *gid)
591 {
592 	return device->query_gid(device, port_num, index, gid);
593 }
594 EXPORT_SYMBOL(ib_query_gid);
595 
596 /**
597  * ib_query_pkey - Get P_Key table entry
598  * @device:Device to query
599  * @port_num:Port number to query
600  * @index:P_Key table index to query
601  * @pkey:Returned P_Key
602  *
603  * ib_query_pkey() fetches the specified P_Key table entry.
604  */
605 int ib_query_pkey(struct ib_device *device,
606 		  u8 port_num, u16 index, u16 *pkey)
607 {
608 	return device->query_pkey(device, port_num, index, pkey);
609 }
610 EXPORT_SYMBOL(ib_query_pkey);
611 
612 /**
613  * ib_modify_device - Change IB device attributes
614  * @device:Device to modify
615  * @device_modify_mask:Mask of attributes to change
616  * @device_modify:New attribute values
617  *
618  * ib_modify_device() changes a device's attributes as specified by
619  * the @device_modify_mask and @device_modify structure.
620  */
621 int ib_modify_device(struct ib_device *device,
622 		     int device_modify_mask,
623 		     struct ib_device_modify *device_modify)
624 {
625 	return device->modify_device(device, device_modify_mask,
626 				     device_modify);
627 }
628 EXPORT_SYMBOL(ib_modify_device);
629 
630 /**
631  * ib_modify_port - Modifies the attributes for the specified port.
632  * @device: The device to modify.
633  * @port_num: The number of the port to modify.
634  * @port_modify_mask: Mask used to specify which attributes of the port
635  *   to change.
636  * @port_modify: New attribute values for the port.
637  *
638  * ib_modify_port() changes a port's attributes as specified by the
639  * @port_modify_mask and @port_modify structure.
640  */
641 int ib_modify_port(struct ib_device *device,
642 		   u8 port_num, int port_modify_mask,
643 		   struct ib_port_modify *port_modify)
644 {
645 	if (port_num < start_port(device) || port_num > end_port(device))
646 		return -EINVAL;
647 
648 	return device->modify_port(device, port_num, port_modify_mask,
649 				   port_modify);
650 }
651 EXPORT_SYMBOL(ib_modify_port);
652 
653 /**
654  * ib_find_gid - Returns the port number and GID table index where
655  *   a specified GID value occurs.
656  * @device: The device to query.
657  * @gid: The GID value to search for.
658  * @port_num: The port number of the device where the GID value was found.
659  * @index: The index into the GID table where the GID was found.  This
660  *   parameter may be NULL.
661  */
662 int ib_find_gid(struct ib_device *device, union ib_gid *gid,
663 		u8 *port_num, u16 *index)
664 {
665 	union ib_gid tmp_gid;
666 	int ret, port, i;
667 
668 	for (port = start_port(device); port <= end_port(device); ++port) {
669 		for (i = 0; i < device->gid_tbl_len[port - start_port(device)]; ++i) {
670 			ret = ib_query_gid(device, port, i, &tmp_gid);
671 			if (ret)
672 				return ret;
673 			if (!memcmp(&tmp_gid, gid, sizeof *gid)) {
674 				*port_num = port;
675 				if (index)
676 					*index = i;
677 				return 0;
678 			}
679 		}
680 	}
681 
682 	return -ENOENT;
683 }
684 EXPORT_SYMBOL(ib_find_gid);
685 
686 /**
687  * ib_find_pkey - Returns the PKey table index where a specified
688  *   PKey value occurs.
689  * @device: The device to query.
690  * @port_num: The port number of the device to search for the PKey.
691  * @pkey: The PKey value to search for.
692  * @index: The index into the PKey table where the PKey was found.
693  */
694 int ib_find_pkey(struct ib_device *device,
695 		 u8 port_num, u16 pkey, u16 *index)
696 {
697 	int ret, i;
698 	u16 tmp_pkey;
699 
700 	for (i = 0; i < device->pkey_tbl_len[port_num - start_port(device)]; ++i) {
701 		ret = ib_query_pkey(device, port_num, i, &tmp_pkey);
702 		if (ret)
703 			return ret;
704 
705 		if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) {
706 			*index = i;
707 			return 0;
708 		}
709 	}
710 
711 	return -ENOENT;
712 }
713 EXPORT_SYMBOL(ib_find_pkey);
714 
715 static int __init ib_core_init(void)
716 {
717 	int ret;
718 
719 	ret = ib_sysfs_setup();
720 	if (ret)
721 		printk(KERN_WARNING "Couldn't create InfiniBand device class\n");
722 
723 	ret = ib_cache_setup();
724 	if (ret) {
725 		printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n");
726 		ib_sysfs_cleanup();
727 	}
728 
729 	return ret;
730 }
731 
732 static void __exit ib_core_cleanup(void)
733 {
734 	ib_cache_cleanup();
735 	ib_sysfs_cleanup();
736 	/* Make sure that any pending umem accounting work is done. */
737 	flush_scheduled_work();
738 }
739 
740 module_init(ib_core_init);
741 module_exit(ib_core_cleanup);
742