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mei: me: add cannon point device ids
[linux/fpc-iii.git] / drivers / infiniband / core / user_mad.c
blob3205800f95794aeea89bd1756e9356dd60381889
1 /*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
4 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
5 * Copyright (c) 2008 Cisco. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36 #define pr_fmt(fmt) "user_mad: " fmt
37
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/device.h>
41 #include <linux/err.h>
42 #include <linux/fs.h>
43 #include <linux/cdev.h>
44 #include <linux/dma-mapping.h>
45 #include <linux/poll.h>
46 #include <linux/mutex.h>
47 #include <linux/kref.h>
48 #include <linux/compat.h>
49 #include <linux/sched.h>
50 #include <linux/semaphore.h>
51 #include <linux/slab.h>
52
53 #include <linux/uaccess.h>
54
55 #include <rdma/ib_mad.h>
56 #include <rdma/ib_user_mad.h>
57
58 MODULE_AUTHOR("Roland Dreier");
59 MODULE_DESCRIPTION("InfiniBand userspace MAD packet access");
60 MODULE_LICENSE("Dual BSD/GPL");
61
62 enum {
63 IB_UMAD_MAX_PORTS = 64,
64 IB_UMAD_MAX_AGENTS = 32,
65
66 IB_UMAD_MAJOR = 231,
67 IB_UMAD_MINOR_BASE = 0
68 };
69
70 /*
71 * Our lifetime rules for these structs are the following:
72 * device special file is opened, we take a reference on the
73 * ib_umad_port's struct ib_umad_device. We drop these
74 * references in the corresponding close().
75 *
76 * In addition to references coming from open character devices, there
77 * is one more reference to each ib_umad_device representing the
78 * module's reference taken when allocating the ib_umad_device in
79 * ib_umad_add_one().
80 *
81 * When destroying an ib_umad_device, we drop the module's reference.
82 */
83
84 struct ib_umad_port {
85 struct cdev cdev;
86 struct device *dev;
87
88 struct cdev sm_cdev;
89 struct device *sm_dev;
90 struct semaphore sm_sem;
91
92 struct mutex file_mutex;
93 struct list_head file_list;
94
95 struct ib_device *ib_dev;
96 struct ib_umad_device *umad_dev;
97 int dev_num;
98 u8 port_num;
99 };
100
101 struct ib_umad_device {
102 struct kobject kobj;
103 struct ib_umad_port port[0];
104 };
105
106 struct ib_umad_file {
107 struct mutex mutex;
108 struct ib_umad_port *port;
109 struct list_head recv_list;
110 struct list_head send_list;
111 struct list_head port_list;
112 spinlock_t send_lock;
113 wait_queue_head_t recv_wait;
114 struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS];
115 int agents_dead;
116 u8 use_pkey_index;
117 u8 already_used;
118 };
119
120 struct ib_umad_packet {
121 struct ib_mad_send_buf *msg;
122 struct ib_mad_recv_wc *recv_wc;
123 struct list_head list;
124 int length;
125 struct ib_user_mad mad;
126 };
127
128 static struct class *umad_class;
129
130 static const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE);
131
132 static DEFINE_SPINLOCK(port_lock);
133 static DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS);
134
135 static void ib_umad_add_one(struct ib_device *device);
136 static void ib_umad_remove_one(struct ib_device *device, void *client_data);
137
138 static void ib_umad_release_dev(struct kobject *kobj)
139 {
140 struct ib_umad_device *dev =
141 container_of(kobj, struct ib_umad_device, kobj);
142
143 kfree(dev);
144 }
145
146 static struct kobj_type ib_umad_dev_ktype = {
147 .release = ib_umad_release_dev,
148 };
149
150 static int hdr_size(struct ib_umad_file *file)
151 {
152 return file->use_pkey_index ? sizeof (struct ib_user_mad_hdr) :
153 sizeof (struct ib_user_mad_hdr_old);
154 }
155
156 /* caller must hold file->mutex */
157 static struct ib_mad_agent *__get_agent(struct ib_umad_file *file, int id)
158 {
159 return file->agents_dead ? NULL : file->agent[id];
160 }
161
162 static int queue_packet(struct ib_umad_file *file,
163 struct ib_mad_agent *agent,
164 struct ib_umad_packet *packet)
165 {
166 int ret = 1;
167
168 mutex_lock(&file->mutex);
169
170 for (packet->mad.hdr.id = 0;
171 packet->mad.hdr.id < IB_UMAD_MAX_AGENTS;
172 packet->mad.hdr.id++)
173 if (agent == __get_agent(file, packet->mad.hdr.id)) {
174 list_add_tail(&packet->list, &file->recv_list);
175 wake_up_interruptible(&file->recv_wait);
176 ret = 0;
177 break;
178 }
179
180 mutex_unlock(&file->mutex);
181
182 return ret;
183 }
184
185 static void dequeue_send(struct ib_umad_file *file,
186 struct ib_umad_packet *packet)
187 {
188 spin_lock_irq(&file->send_lock);
189 list_del(&packet->list);
190 spin_unlock_irq(&file->send_lock);
191 }
192
193 static void send_handler(struct ib_mad_agent *agent,
194 struct ib_mad_send_wc *send_wc)
195 {
196 struct ib_umad_file *file = agent->context;
197 struct ib_umad_packet *packet = send_wc->send_buf->context[0];
198
199 dequeue_send(file, packet);
200 rdma_destroy_ah(packet->msg->ah);
201 ib_free_send_mad(packet->msg);
202
203 if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) {
204 packet->length = IB_MGMT_MAD_HDR;
205 packet->mad.hdr.status = ETIMEDOUT;
206 if (!queue_packet(file, agent, packet))
207 return;
208 }
209 kfree(packet);
210 }
211
212 static void recv_handler(struct ib_mad_agent *agent,
213 struct ib_mad_send_buf *send_buf,
214 struct ib_mad_recv_wc *mad_recv_wc)
215 {
216 struct ib_umad_file *file = agent->context;
217 struct ib_umad_packet *packet;
218
219 if (mad_recv_wc->wc->status != IB_WC_SUCCESS)
220 goto err1;
221
222 packet = kzalloc(sizeof *packet, GFP_KERNEL);
223 if (!packet)
224 goto err1;
225
226 packet->length = mad_recv_wc->mad_len;
227 packet->recv_wc = mad_recv_wc;
228
229 packet->mad.hdr.status = 0;
230 packet->mad.hdr.length = hdr_size(file) + mad_recv_wc->mad_len;
231 packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp);
232 /*
233 * On OPA devices it is okay to lose the upper 16 bits of LID as this
234 * information is obtained elsewhere. Mask off the upper 16 bits.
235 */
236 if (agent->device->port_immutable[agent->port_num].core_cap_flags &
237 RDMA_CORE_PORT_INTEL_OPA)
238 packet->mad.hdr.lid = ib_lid_be16(0xFFFF &
239 mad_recv_wc->wc->slid);
240 else
241 packet->mad.hdr.lid = ib_lid_be16(mad_recv_wc->wc->slid);
242 packet->mad.hdr.sl = mad_recv_wc->wc->sl;
243 packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits;
244 packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index;
245 packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH);
246 if (packet->mad.hdr.grh_present) {
247 struct rdma_ah_attr ah_attr;
248 const struct ib_global_route *grh;
249
250 ib_init_ah_from_wc(agent->device, agent->port_num,
251 mad_recv_wc->wc, mad_recv_wc->recv_buf.grh,
252 &ah_attr);
253
254 grh = rdma_ah_read_grh(&ah_attr);
255 packet->mad.hdr.gid_index = grh->sgid_index;
256 packet->mad.hdr.hop_limit = grh->hop_limit;
257 packet->mad.hdr.traffic_class = grh->traffic_class;
258 memcpy(packet->mad.hdr.gid, &grh->dgid, 16);
259 packet->mad.hdr.flow_label = cpu_to_be32(grh->flow_label);
260 }
261
262 if (queue_packet(file, agent, packet))
263 goto err2;
264 return;
265
266 err2:
267 kfree(packet);
268 err1:
269 ib_free_recv_mad(mad_recv_wc);
270 }
271
272 static ssize_t copy_recv_mad(struct ib_umad_file *file, char __user *buf,
273 struct ib_umad_packet *packet, size_t count)
274 {
275 struct ib_mad_recv_buf *recv_buf;
276 int left, seg_payload, offset, max_seg_payload;
277 size_t seg_size;
278
279 recv_buf = &packet->recv_wc->recv_buf;
280 seg_size = packet->recv_wc->mad_seg_size;
281
282 /* We need enough room to copy the first (or only) MAD segment. */
283 if ((packet->length <= seg_size &&
284 count < hdr_size(file) + packet->length) ||
285 (packet->length > seg_size &&
286 count < hdr_size(file) + seg_size))
287 return -EINVAL;
288
289 if (copy_to_user(buf, &packet->mad, hdr_size(file)))
290 return -EFAULT;
291
292 buf += hdr_size(file);
293 seg_payload = min_t(int, packet->length, seg_size);
294 if (copy_to_user(buf, recv_buf->mad, seg_payload))
295 return -EFAULT;
296
297 if (seg_payload < packet->length) {
298 /*
299 * Multipacket RMPP MAD message. Copy remainder of message.
300 * Note that last segment may have a shorter payload.
301 */
302 if (count < hdr_size(file) + packet->length) {
303 /*
304 * The buffer is too small, return the first RMPP segment,
305 * which includes the RMPP message length.
306 */
307 return -ENOSPC;
308 }
309 offset = ib_get_mad_data_offset(recv_buf->mad->mad_hdr.mgmt_class);
310 max_seg_payload = seg_size - offset;
311
312 for (left = packet->length - seg_payload, buf += seg_payload;
313 left; left -= seg_payload, buf += seg_payload) {
314 recv_buf = container_of(recv_buf->list.next,
315 struct ib_mad_recv_buf, list);
316 seg_payload = min(left, max_seg_payload);
317 if (copy_to_user(buf, ((void *) recv_buf->mad) + offset,
318 seg_payload))
319 return -EFAULT;
320 }
321 }
322 return hdr_size(file) + packet->length;
323 }
324
325 static ssize_t copy_send_mad(struct ib_umad_file *file, char __user *buf,
326 struct ib_umad_packet *packet, size_t count)
327 {
328 ssize_t size = hdr_size(file) + packet->length;
329
330 if (count < size)
331 return -EINVAL;
332
333 if (copy_to_user(buf, &packet->mad, hdr_size(file)))
334 return -EFAULT;
335
336 buf += hdr_size(file);
337
338 if (copy_to_user(buf, packet->mad.data, packet->length))
339 return -EFAULT;
340
341 return size;
342 }
343
344 static ssize_t ib_umad_read(struct file *filp, char __user *buf,
345 size_t count, loff_t *pos)
346 {
347 struct ib_umad_file *file = filp->private_data;
348 struct ib_umad_packet *packet;
349 ssize_t ret;
350
351 if (count < hdr_size(file))
352 return -EINVAL;
353
354 mutex_lock(&file->mutex);
355
356 while (list_empty(&file->recv_list)) {
357 mutex_unlock(&file->mutex);
358
359 if (filp->f_flags & O_NONBLOCK)
360 return -EAGAIN;
361
362 if (wait_event_interruptible(file->recv_wait,
363 !list_empty(&file->recv_list)))
364 return -ERESTARTSYS;
365
366 mutex_lock(&file->mutex);
367 }
368
369 packet = list_entry(file->recv_list.next, struct ib_umad_packet, list);
370 list_del(&packet->list);
371
372 mutex_unlock(&file->mutex);
373
374 if (packet->recv_wc)
375 ret = copy_recv_mad(file, buf, packet, count);
376 else
377 ret = copy_send_mad(file, buf, packet, count);
378
379 if (ret < 0) {
380 /* Requeue packet */
381 mutex_lock(&file->mutex);
382 list_add(&packet->list, &file->recv_list);
383 mutex_unlock(&file->mutex);
384 } else {
385 if (packet->recv_wc)
386 ib_free_recv_mad(packet->recv_wc);
387 kfree(packet);
388 }
389 return ret;
390 }
391
392 static int copy_rmpp_mad(struct ib_mad_send_buf *msg, const char __user *buf)
393 {
394 int left, seg;
395
396 /* Copy class specific header */
397 if ((msg->hdr_len > IB_MGMT_RMPP_HDR) &&
398 copy_from_user(msg->mad + IB_MGMT_RMPP_HDR, buf + IB_MGMT_RMPP_HDR,
399 msg->hdr_len - IB_MGMT_RMPP_HDR))
400 return -EFAULT;
401
402 /* All headers are in place. Copy data segments. */
403 for (seg = 1, left = msg->data_len, buf += msg->hdr_len; left > 0;
404 seg++, left -= msg->seg_size, buf += msg->seg_size) {
405 if (copy_from_user(ib_get_rmpp_segment(msg, seg), buf,
406 min(left, msg->seg_size)))
407 return -EFAULT;
408 }
409 return 0;
410 }
411
412 static int same_destination(struct ib_user_mad_hdr *hdr1,
413 struct ib_user_mad_hdr *hdr2)
414 {
415 if (!hdr1->grh_present && !hdr2->grh_present)
416 return (hdr1->lid == hdr2->lid);
417
418 if (hdr1->grh_present && hdr2->grh_present)
419 return !memcmp(hdr1->gid, hdr2->gid, 16);
420
421 return 0;
422 }
423
424 static int is_duplicate(struct ib_umad_file *file,
425 struct ib_umad_packet *packet)
426 {
427 struct ib_umad_packet *sent_packet;
428 struct ib_mad_hdr *sent_hdr, *hdr;
429
430 hdr = (struct ib_mad_hdr *) packet->mad.data;
431 list_for_each_entry(sent_packet, &file->send_list, list) {
432 sent_hdr = (struct ib_mad_hdr *) sent_packet->mad.data;
433
434 if ((hdr->tid != sent_hdr->tid) ||
435 (hdr->mgmt_class != sent_hdr->mgmt_class))
436 continue;
437
438 /*
439 * No need to be overly clever here. If two new operations have
440 * the same TID, reject the second as a duplicate. This is more
441 * restrictive than required by the spec.
442 */
443 if (!ib_response_mad(hdr)) {
444 if (!ib_response_mad(sent_hdr))
445 return 1;
446 continue;
447 } else if (!ib_response_mad(sent_hdr))
448 continue;
449
450 if (same_destination(&packet->mad.hdr, &sent_packet->mad.hdr))
451 return 1;
452 }
453
454 return 0;
455 }
456
457 static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
458 size_t count, loff_t *pos)
459 {
460 struct ib_umad_file *file = filp->private_data;
461 struct ib_umad_packet *packet;
462 struct ib_mad_agent *agent;
463 struct rdma_ah_attr ah_attr;
464 struct ib_ah *ah;
465 struct ib_rmpp_mad *rmpp_mad;
466 __be64 *tid;
467 int ret, data_len, hdr_len, copy_offset, rmpp_active;
468 u8 base_version;
469
470 if (count < hdr_size(file) + IB_MGMT_RMPP_HDR)
471 return -EINVAL;
472
473 packet = kzalloc(sizeof *packet + IB_MGMT_RMPP_HDR, GFP_KERNEL);
474 if (!packet)
475 return -ENOMEM;
476
477 if (copy_from_user(&packet->mad, buf, hdr_size(file))) {
478 ret = -EFAULT;
479 goto err;
480 }
481
482 if (packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) {
483 ret = -EINVAL;
484 goto err;
485 }
486
487 buf += hdr_size(file);
488
489 if (copy_from_user(packet->mad.data, buf, IB_MGMT_RMPP_HDR)) {
490 ret = -EFAULT;
491 goto err;
492 }
493
494 mutex_lock(&file->mutex);
495
496 agent = __get_agent(file, packet->mad.hdr.id);
497 if (!agent) {
498 ret = -EINVAL;
499 goto err_up;
500 }
501
502 memset(&ah_attr, 0, sizeof ah_attr);
503 ah_attr.type = rdma_ah_find_type(agent->device,
504 file->port->port_num);
505 rdma_ah_set_dlid(&ah_attr, be16_to_cpu(packet->mad.hdr.lid));
506 rdma_ah_set_sl(&ah_attr, packet->mad.hdr.sl);
507 rdma_ah_set_path_bits(&ah_attr, packet->mad.hdr.path_bits);
508 rdma_ah_set_port_num(&ah_attr, file->port->port_num);
509 if (packet->mad.hdr.grh_present) {
510 rdma_ah_set_grh(&ah_attr, NULL,
511 be32_to_cpu(packet->mad.hdr.flow_label),
512 packet->mad.hdr.gid_index,
513 packet->mad.hdr.hop_limit,
514 packet->mad.hdr.traffic_class);
515 rdma_ah_set_dgid_raw(&ah_attr, packet->mad.hdr.gid);
516 }
517
518 ah = rdma_create_user_ah(agent->qp->pd, &ah_attr, NULL);
519 if (IS_ERR(ah)) {
520 ret = PTR_ERR(ah);
521 goto err_up;
522 }
523
524 rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data;
525 hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class);
526
527 if (ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)
528 && ib_mad_kernel_rmpp_agent(agent)) {
529 copy_offset = IB_MGMT_RMPP_HDR;
530 rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
531 IB_MGMT_RMPP_FLAG_ACTIVE;
532 } else {
533 copy_offset = IB_MGMT_MAD_HDR;
534 rmpp_active = 0;
535 }
536
537 base_version = ((struct ib_mad_hdr *)&packet->mad.data)->base_version;
538 data_len = count - hdr_size(file) - hdr_len;
539 packet->msg = ib_create_send_mad(agent,
540 be32_to_cpu(packet->mad.hdr.qpn),
541 packet->mad.hdr.pkey_index, rmpp_active,
542 hdr_len, data_len, GFP_KERNEL,
543 base_version);
544 if (IS_ERR(packet->msg)) {
545 ret = PTR_ERR(packet->msg);
546 goto err_ah;
547 }
548
549 packet->msg->ah = ah;
550 packet->msg->timeout_ms = packet->mad.hdr.timeout_ms;
551 packet->msg->retries = packet->mad.hdr.retries;
552 packet->msg->context[0] = packet;
553
554 /* Copy MAD header. Any RMPP header is already in place. */
555 memcpy(packet->msg->mad, packet->mad.data, IB_MGMT_MAD_HDR);
556
557 if (!rmpp_active) {
558 if (copy_from_user(packet->msg->mad + copy_offset,
559 buf + copy_offset,
560 hdr_len + data_len - copy_offset)) {
561 ret = -EFAULT;
562 goto err_msg;
563 }
564 } else {
565 ret = copy_rmpp_mad(packet->msg, buf);
566 if (ret)
567 goto err_msg;
568 }
569
570 /*
571 * Set the high-order part of the transaction ID to make MADs from
572 * different agents unique, and allow routing responses back to the
573 * original requestor.
574 */
575 if (!ib_response_mad(packet->msg->mad)) {
576 tid = &((struct ib_mad_hdr *) packet->msg->mad)->tid;
577 *tid = cpu_to_be64(((u64) agent->hi_tid) << 32 |
578 (be64_to_cpup(tid) & 0xffffffff));
579 rmpp_mad->mad_hdr.tid = *tid;
580 }
581
582 if (!ib_mad_kernel_rmpp_agent(agent)
583 && ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)
584 && (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE)) {
585 spin_lock_irq(&file->send_lock);
586 list_add_tail(&packet->list, &file->send_list);
587 spin_unlock_irq(&file->send_lock);
588 } else {
589 spin_lock_irq(&file->send_lock);
590 ret = is_duplicate(file, packet);
591 if (!ret)
592 list_add_tail(&packet->list, &file->send_list);
593 spin_unlock_irq(&file->send_lock);
594 if (ret) {
595 ret = -EINVAL;
596 goto err_msg;
597 }
598 }
599
600 ret = ib_post_send_mad(packet->msg, NULL);
601 if (ret)
602 goto err_send;
603
604 mutex_unlock(&file->mutex);
605 return count;
606
607 err_send:
608 dequeue_send(file, packet);
609 err_msg:
610 ib_free_send_mad(packet->msg);
611 err_ah:
612 rdma_destroy_ah(ah);
613 err_up:
614 mutex_unlock(&file->mutex);
615 err:
616 kfree(packet);
617 return ret;
618 }
619
620 static unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait)
621 {
622 struct ib_umad_file *file = filp->private_data;
623
624 /* we will always be able to post a MAD send */
625 unsigned int mask = POLLOUT | POLLWRNORM;
626
627 poll_wait(filp, &file->recv_wait, wait);
628
629 if (!list_empty(&file->recv_list))
630 mask |= POLLIN | POLLRDNORM;
631
632 return mask;
633 }
634
635 static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg,
636 int compat_method_mask)
637 {
638 struct ib_user_mad_reg_req ureq;
639 struct ib_mad_reg_req req;
640 struct ib_mad_agent *agent = NULL;
641 int agent_id;
642 int ret;
643
644 mutex_lock(&file->port->file_mutex);
645 mutex_lock(&file->mutex);
646
647 if (!file->port->ib_dev) {
648 dev_notice(file->port->dev,
649 "ib_umad_reg_agent: invalid device\n");
650 ret = -EPIPE;
651 goto out;
652 }
653
654 if (copy_from_user(&ureq, arg, sizeof ureq)) {
655 ret = -EFAULT;
656 goto out;
657 }
658
659 if (ureq.qpn != 0 && ureq.qpn != 1) {
660 dev_notice(file->port->dev,
661 "ib_umad_reg_agent: invalid QPN %d specified\n",
662 ureq.qpn);
663 ret = -EINVAL;
664 goto out;
665 }
666
667 for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id)
668 if (!__get_agent(file, agent_id))
669 goto found;
670
671 dev_notice(file->port->dev,
672 "ib_umad_reg_agent: Max Agents (%u) reached\n",
673 IB_UMAD_MAX_AGENTS);
674 ret = -ENOMEM;
675 goto out;
676
677 found:
678 if (ureq.mgmt_class) {
679 memset(&req, 0, sizeof(req));
680 req.mgmt_class = ureq.mgmt_class;
681 req.mgmt_class_version = ureq.mgmt_class_version;
682 memcpy(req.oui, ureq.oui, sizeof req.oui);
683
684 if (compat_method_mask) {
685 u32 *umm = (u32 *) ureq.method_mask;
686 int i;
687
688 for (i = 0; i < BITS_TO_LONGS(IB_MGMT_MAX_METHODS); ++i)
689 req.method_mask[i] =
690 umm[i * 2] | ((u64) umm[i * 2 + 1] << 32);
691 } else
692 memcpy(req.method_mask, ureq.method_mask,
693 sizeof req.method_mask);
694 }
695
696 agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num,
697 ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
698 ureq.mgmt_class ? &req : NULL,
699 ureq.rmpp_version,
700 send_handler, recv_handler, file, 0);
701 if (IS_ERR(agent)) {
702 ret = PTR_ERR(agent);
703 agent = NULL;
704 goto out;
705 }
706
707 if (put_user(agent_id,
708 (u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) {
709 ret = -EFAULT;
710 goto out;
711 }
712
713 if (!file->already_used) {
714 file->already_used = 1;
715 if (!file->use_pkey_index) {
716 dev_warn(file->port->dev,
717 "process %s did not enable P_Key index support.\n",
718 current->comm);
719 dev_warn(file->port->dev,
720 " Documentation/infiniband/user_mad.txt has info on the new ABI.\n");
721 }
722 }
723
724 file->agent[agent_id] = agent;
725 ret = 0;
726
727 out:
728 mutex_unlock(&file->mutex);
729
730 if (ret && agent)
731 ib_unregister_mad_agent(agent);
732
733 mutex_unlock(&file->port->file_mutex);
734
735 return ret;
736 }
737
738 static int ib_umad_reg_agent2(struct ib_umad_file *file, void __user *arg)
739 {
740 struct ib_user_mad_reg_req2 ureq;
741 struct ib_mad_reg_req req;
742 struct ib_mad_agent *agent = NULL;
743 int agent_id;
744 int ret;
745
746 mutex_lock(&file->port->file_mutex);
747 mutex_lock(&file->mutex);
748
749 if (!file->port->ib_dev) {
750 dev_notice(file->port->dev,
751 "ib_umad_reg_agent2: invalid device\n");
752 ret = -EPIPE;
753 goto out;
754 }
755
756 if (copy_from_user(&ureq, arg, sizeof(ureq))) {
757 ret = -EFAULT;
758 goto out;
759 }
760
761 if (ureq.qpn != 0 && ureq.qpn != 1) {
762 dev_notice(file->port->dev,
763 "ib_umad_reg_agent2: invalid QPN %d specified\n",
764 ureq.qpn);
765 ret = -EINVAL;
766 goto out;
767 }
768
769 if (ureq.flags & ~IB_USER_MAD_REG_FLAGS_CAP) {
770 dev_notice(file->port->dev,
771 "ib_umad_reg_agent2 failed: invalid registration flags specified 0x%x; supported 0x%x\n",
772 ureq.flags, IB_USER_MAD_REG_FLAGS_CAP);
773 ret = -EINVAL;
774
775 if (put_user((u32)IB_USER_MAD_REG_FLAGS_CAP,
776 (u32 __user *) (arg + offsetof(struct
777 ib_user_mad_reg_req2, flags))))
778 ret = -EFAULT;
779
780 goto out;
781 }
782
783 for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id)
784 if (!__get_agent(file, agent_id))
785 goto found;
786
787 dev_notice(file->port->dev,
788 "ib_umad_reg_agent2: Max Agents (%u) reached\n",
789 IB_UMAD_MAX_AGENTS);
790 ret = -ENOMEM;
791 goto out;
792
793 found:
794 if (ureq.mgmt_class) {
795 memset(&req, 0, sizeof(req));
796 req.mgmt_class = ureq.mgmt_class;
797 req.mgmt_class_version = ureq.mgmt_class_version;
798 if (ureq.oui & 0xff000000) {
799 dev_notice(file->port->dev,
800 "ib_umad_reg_agent2 failed: oui invalid 0x%08x\n",
801 ureq.oui);
802 ret = -EINVAL;
803 goto out;
804 }
805 req.oui[2] = ureq.oui & 0x0000ff;
806 req.oui[1] = (ureq.oui & 0x00ff00) >> 8;
807 req.oui[0] = (ureq.oui & 0xff0000) >> 16;
808 memcpy(req.method_mask, ureq.method_mask,
809 sizeof(req.method_mask));
810 }
811
812 agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num,
813 ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
814 ureq.mgmt_class ? &req : NULL,
815 ureq.rmpp_version,
816 send_handler, recv_handler, file,
817 ureq.flags);
818 if (IS_ERR(agent)) {
819 ret = PTR_ERR(agent);
820 agent = NULL;
821 goto out;
822 }
823
824 if (put_user(agent_id,
825 (u32 __user *)(arg +
826 offsetof(struct ib_user_mad_reg_req2, id)))) {
827 ret = -EFAULT;
828 goto out;
829 }
830
831 if (!file->already_used) {
832 file->already_used = 1;
833 file->use_pkey_index = 1;
834 }
835
836 file->agent[agent_id] = agent;
837 ret = 0;
838
839 out:
840 mutex_unlock(&file->mutex);
841
842 if (ret && agent)
843 ib_unregister_mad_agent(agent);
844
845 mutex_unlock(&file->port->file_mutex);
846
847 return ret;
848 }
849
850
851 static int ib_umad_unreg_agent(struct ib_umad_file *file, u32 __user *arg)
852 {
853 struct ib_mad_agent *agent = NULL;
854 u32 id;
855 int ret = 0;
856
857 if (get_user(id, arg))
858 return -EFAULT;
859
860 mutex_lock(&file->port->file_mutex);
861 mutex_lock(&file->mutex);
862
863 if (id >= IB_UMAD_MAX_AGENTS || !__get_agent(file, id)) {
864 ret = -EINVAL;
865 goto out;
866 }
867
868 agent = file->agent[id];
869 file->agent[id] = NULL;
870
871 out:
872 mutex_unlock(&file->mutex);
873
874 if (agent)
875 ib_unregister_mad_agent(agent);
876
877 mutex_unlock(&file->port->file_mutex);
878
879 return ret;
880 }
881
882 static long ib_umad_enable_pkey(struct ib_umad_file *file)
883 {
884 int ret = 0;
885
886 mutex_lock(&file->mutex);
887 if (file->already_used)
888 ret = -EINVAL;
889 else
890 file->use_pkey_index = 1;
891 mutex_unlock(&file->mutex);
892
893 return ret;
894 }
895
896 static long ib_umad_ioctl(struct file *filp, unsigned int cmd,
897 unsigned long arg)
898 {
899 switch (cmd) {
900 case IB_USER_MAD_REGISTER_AGENT:
901 return ib_umad_reg_agent(filp->private_data, (void __user *) arg, 0);
902 case IB_USER_MAD_UNREGISTER_AGENT:
903 return ib_umad_unreg_agent(filp->private_data, (__u32 __user *) arg);
904 case IB_USER_MAD_ENABLE_PKEY:
905 return ib_umad_enable_pkey(filp->private_data);
906 case IB_USER_MAD_REGISTER_AGENT2:
907 return ib_umad_reg_agent2(filp->private_data, (void __user *) arg);
908 default:
909 return -ENOIOCTLCMD;
910 }
911 }
912
913 #ifdef CONFIG_COMPAT
914 static long ib_umad_compat_ioctl(struct file *filp, unsigned int cmd,
915 unsigned long arg)
916 {
917 switch (cmd) {
918 case IB_USER_MAD_REGISTER_AGENT:
919 return ib_umad_reg_agent(filp->private_data, compat_ptr(arg), 1);
920 case IB_USER_MAD_UNREGISTER_AGENT:
921 return ib_umad_unreg_agent(filp->private_data, compat_ptr(arg));
922 case IB_USER_MAD_ENABLE_PKEY:
923 return ib_umad_enable_pkey(filp->private_data);
924 case IB_USER_MAD_REGISTER_AGENT2:
925 return ib_umad_reg_agent2(filp->private_data, compat_ptr(arg));
926 default:
927 return -ENOIOCTLCMD;
928 }
929 }
930 #endif
931
932 /*
933 * ib_umad_open() does not need the BKL:
934 *
935 * - the ib_umad_port structures are properly reference counted, and
936 * everything else is purely local to the file being created, so
937 * races against other open calls are not a problem;
938 * - the ioctl method does not affect any global state outside of the
939 * file structure being operated on;
940 */
941 static int ib_umad_open(struct inode *inode, struct file *filp)
942 {
943 struct ib_umad_port *port;
944 struct ib_umad_file *file;
945 int ret = -ENXIO;
946
947 port = container_of(inode->i_cdev, struct ib_umad_port, cdev);
948
949 mutex_lock(&port->file_mutex);
950
951 if (!port->ib_dev)
952 goto out;
953
954 ret = -ENOMEM;
955 file = kzalloc(sizeof *file, GFP_KERNEL);
956 if (!file)
957 goto out;
958
959 mutex_init(&file->mutex);
960 spin_lock_init(&file->send_lock);
961 INIT_LIST_HEAD(&file->recv_list);
962 INIT_LIST_HEAD(&file->send_list);
963 init_waitqueue_head(&file->recv_wait);
964
965 file->port = port;
966 filp->private_data = file;
967
968 list_add_tail(&file->port_list, &port->file_list);
969
970 ret = nonseekable_open(inode, filp);
971 if (ret) {
972 list_del(&file->port_list);
973 kfree(file);
974 goto out;
975 }
976
977 kobject_get(&port->umad_dev->kobj);
978
979 out:
980 mutex_unlock(&port->file_mutex);
981 return ret;
982 }
983
984 static int ib_umad_close(struct inode *inode, struct file *filp)
985 {
986 struct ib_umad_file *file = filp->private_data;
987 struct ib_umad_device *dev = file->port->umad_dev;
988 struct ib_umad_packet *packet, *tmp;
989 int already_dead;
990 int i;
991
992 mutex_lock(&file->port->file_mutex);
993 mutex_lock(&file->mutex);
994
995 already_dead = file->agents_dead;
996 file->agents_dead = 1;
997
998 list_for_each_entry_safe(packet, tmp, &file->recv_list, list) {
999 if (packet->recv_wc)
1000 ib_free_recv_mad(packet->recv_wc);
1001 kfree(packet);
1002 }
1003
1004 list_del(&file->port_list);
1005
1006 mutex_unlock(&file->mutex);
1007
1008 if (!already_dead)
1009 for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i)
1010 if (file->agent[i])
1011 ib_unregister_mad_agent(file->agent[i]);
1012
1013 mutex_unlock(&file->port->file_mutex);
1014
1015 kfree(file);
1016 kobject_put(&dev->kobj);
1017
1018 return 0;
1019 }
1020
1021 static const struct file_operations umad_fops = {
1022 .owner = THIS_MODULE,
1023 .read = ib_umad_read,
1024 .write = ib_umad_write,
1025 .poll = ib_umad_poll,
1026 .unlocked_ioctl = ib_umad_ioctl,
1027 #ifdef CONFIG_COMPAT
1028 .compat_ioctl = ib_umad_compat_ioctl,
1029 #endif
1030 .open = ib_umad_open,
1031 .release = ib_umad_close,
1032 .llseek = no_llseek,
1033 };
1034
1035 static int ib_umad_sm_open(struct inode *inode, struct file *filp)
1036 {
1037 struct ib_umad_port *port;
1038 struct ib_port_modify props = {
1039 .set_port_cap_mask = IB_PORT_SM
1040 };
1041 int ret;
1042
1043 port = container_of(inode->i_cdev, struct ib_umad_port, sm_cdev);
1044
1045 if (filp->f_flags & O_NONBLOCK) {
1046 if (down_trylock(&port->sm_sem)) {
1047 ret = -EAGAIN;
1048 goto fail;
1049 }
1050 } else {
1051 if (down_interruptible(&port->sm_sem)) {
1052 ret = -ERESTARTSYS;
1053 goto fail;
1054 }
1055 }
1056
1057 ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props);
1058 if (ret)
1059 goto err_up_sem;
1060
1061 filp->private_data = port;
1062
1063 ret = nonseekable_open(inode, filp);
1064 if (ret)
1065 goto err_clr_sm_cap;
1066
1067 kobject_get(&port->umad_dev->kobj);
1068
1069 return 0;
1070
1071 err_clr_sm_cap:
1072 swap(props.set_port_cap_mask, props.clr_port_cap_mask);
1073 ib_modify_port(port->ib_dev, port->port_num, 0, &props);
1074
1075 err_up_sem:
1076 up(&port->sm_sem);
1077
1078 fail:
1079 return ret;
1080 }
1081
1082 static int ib_umad_sm_close(struct inode *inode, struct file *filp)
1083 {
1084 struct ib_umad_port *port = filp->private_data;
1085 struct ib_port_modify props = {
1086 .clr_port_cap_mask = IB_PORT_SM
1087 };
1088 int ret = 0;
1089
1090 mutex_lock(&port->file_mutex);
1091 if (port->ib_dev)
1092 ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props);
1093 mutex_unlock(&port->file_mutex);
1094
1095 up(&port->sm_sem);
1096
1097 kobject_put(&port->umad_dev->kobj);
1098
1099 return ret;
1100 }
1101
1102 static const struct file_operations umad_sm_fops = {
1103 .owner = THIS_MODULE,
1104 .open = ib_umad_sm_open,
1105 .release = ib_umad_sm_close,
1106 .llseek = no_llseek,
1107 };
1108
1109 static struct ib_client umad_client = {
1110 .name = "umad",
1111 .add = ib_umad_add_one,
1112 .remove = ib_umad_remove_one
1113 };
1114
1115 static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr,
1116 char *buf)
1117 {
1118 struct ib_umad_port *port = dev_get_drvdata(dev);
1119
1120 if (!port)
1121 return -ENODEV;
1122
1123 return sprintf(buf, "%s\n", port->ib_dev->name);
1124 }
1125 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
1126
1127 static ssize_t show_port(struct device *dev, struct device_attribute *attr,
1128 char *buf)
1129 {
1130 struct ib_umad_port *port = dev_get_drvdata(dev);
1131
1132 if (!port)
1133 return -ENODEV;
1134
1135 return sprintf(buf, "%d\n", port->port_num);
1136 }
1137 static DEVICE_ATTR(port, S_IRUGO, show_port, NULL);
1138
1139 static CLASS_ATTR_STRING(abi_version, S_IRUGO,
1140 __stringify(IB_USER_MAD_ABI_VERSION));
1141
1142 static dev_t overflow_maj;
1143 static DECLARE_BITMAP(overflow_map, IB_UMAD_MAX_PORTS);
1144 static int find_overflow_devnum(struct ib_device *device)
1145 {
1146 int ret;
1147
1148 if (!overflow_maj) {
1149 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UMAD_MAX_PORTS * 2,
1150 "infiniband_mad");
1151 if (ret) {
1152 dev_err(&device->dev,
1153 "couldn't register dynamic device number\n");
1154 return ret;
1155 }
1156 }
1157
1158 ret = find_first_zero_bit(overflow_map, IB_UMAD_MAX_PORTS);
1159 if (ret >= IB_UMAD_MAX_PORTS)
1160 return -1;
1161
1162 return ret;
1163 }
1164
1165 static int ib_umad_init_port(struct ib_device *device, int port_num,
1166 struct ib_umad_device *umad_dev,
1167 struct ib_umad_port *port)
1168 {
1169 int devnum;
1170 dev_t base;
1171
1172 spin_lock(&port_lock);
1173 devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS);
1174 if (devnum >= IB_UMAD_MAX_PORTS) {
1175 spin_unlock(&port_lock);
1176 devnum = find_overflow_devnum(device);
1177 if (devnum < 0)
1178 return -1;
1179
1180 spin_lock(&port_lock);
1181 port->dev_num = devnum + IB_UMAD_MAX_PORTS;
1182 base = devnum + overflow_maj;
1183 set_bit(devnum, overflow_map);
1184 } else {
1185 port->dev_num = devnum;
1186 base = devnum + base_dev;
1187 set_bit(devnum, dev_map);
1188 }
1189 spin_unlock(&port_lock);
1190
1191 port->ib_dev = device;
1192 port->port_num = port_num;
1193 sema_init(&port->sm_sem, 1);
1194 mutex_init(&port->file_mutex);
1195 INIT_LIST_HEAD(&port->file_list);
1196
1197 cdev_init(&port->cdev, &umad_fops);
1198 port->cdev.owner = THIS_MODULE;
1199 cdev_set_parent(&port->cdev, &umad_dev->kobj);
1200 kobject_set_name(&port->cdev.kobj, "umad%d", port->dev_num);
1201 if (cdev_add(&port->cdev, base, 1))
1202 goto err_cdev;
1203
1204 port->dev = device_create(umad_class, device->dev.parent,
1205 port->cdev.dev, port,
1206 "umad%d", port->dev_num);
1207 if (IS_ERR(port->dev))
1208 goto err_cdev;
1209
1210 if (device_create_file(port->dev, &dev_attr_ibdev))
1211 goto err_dev;
1212 if (device_create_file(port->dev, &dev_attr_port))
1213 goto err_dev;
1214
1215 base += IB_UMAD_MAX_PORTS;
1216 cdev_init(&port->sm_cdev, &umad_sm_fops);
1217 port->sm_cdev.owner = THIS_MODULE;
1218 cdev_set_parent(&port->sm_cdev, &umad_dev->kobj);
1219 kobject_set_name(&port->sm_cdev.kobj, "issm%d", port->dev_num);
1220 if (cdev_add(&port->sm_cdev, base, 1))
1221 goto err_sm_cdev;
1222
1223 port->sm_dev = device_create(umad_class, device->dev.parent,
1224 port->sm_cdev.dev, port,
1225 "issm%d", port->dev_num);
1226 if (IS_ERR(port->sm_dev))
1227 goto err_sm_cdev;
1228
1229 if (device_create_file(port->sm_dev, &dev_attr_ibdev))
1230 goto err_sm_dev;
1231 if (device_create_file(port->sm_dev, &dev_attr_port))
1232 goto err_sm_dev;
1233
1234 return 0;
1235
1236 err_sm_dev:
1237 device_destroy(umad_class, port->sm_cdev.dev);
1238
1239 err_sm_cdev:
1240 cdev_del(&port->sm_cdev);
1241
1242 err_dev:
1243 device_destroy(umad_class, port->cdev.dev);
1244
1245 err_cdev:
1246 cdev_del(&port->cdev);
1247 if (port->dev_num < IB_UMAD_MAX_PORTS)
1248 clear_bit(devnum, dev_map);
1249 else
1250 clear_bit(devnum, overflow_map);
1251
1252 return -1;
1253 }
1254
1255 static void ib_umad_kill_port(struct ib_umad_port *port)
1256 {
1257 struct ib_umad_file *file;
1258 int id;
1259
1260 dev_set_drvdata(port->dev, NULL);
1261 dev_set_drvdata(port->sm_dev, NULL);
1262
1263 device_destroy(umad_class, port->cdev.dev);
1264 device_destroy(umad_class, port->sm_cdev.dev);
1265
1266 cdev_del(&port->cdev);
1267 cdev_del(&port->sm_cdev);
1268
1269 mutex_lock(&port->file_mutex);
1270
1271 port->ib_dev = NULL;
1272
1273 list_for_each_entry(file, &port->file_list, port_list) {
1274 mutex_lock(&file->mutex);
1275 file->agents_dead = 1;
1276 mutex_unlock(&file->mutex);
1277
1278 for (id = 0; id < IB_UMAD_MAX_AGENTS; ++id)
1279 if (file->agent[id])
1280 ib_unregister_mad_agent(file->agent[id]);
1281 }
1282
1283 mutex_unlock(&port->file_mutex);
1284
1285 if (port->dev_num < IB_UMAD_MAX_PORTS)
1286 clear_bit(port->dev_num, dev_map);
1287 else
1288 clear_bit(port->dev_num - IB_UMAD_MAX_PORTS, overflow_map);
1289 }
1290
1291 static void ib_umad_add_one(struct ib_device *device)
1292 {
1293 struct ib_umad_device *umad_dev;
1294 int s, e, i;
1295 int count = 0;
1296
1297 s = rdma_start_port(device);
1298 e = rdma_end_port(device);
1299
1300 umad_dev = kzalloc(sizeof *umad_dev +
1301 (e - s + 1) * sizeof (struct ib_umad_port),
1302 GFP_KERNEL);
1303 if (!umad_dev)
1304 return;
1305
1306 kobject_init(&umad_dev->kobj, &ib_umad_dev_ktype);
1307
1308 for (i = s; i <= e; ++i) {
1309 if (!rdma_cap_ib_mad(device, i))
1310 continue;
1311
1312 umad_dev->port[i - s].umad_dev = umad_dev;
1313
1314 if (ib_umad_init_port(device, i, umad_dev,
1315 &umad_dev->port[i - s]))
1316 goto err;
1317
1318 count++;
1319 }
1320
1321 if (!count)
1322 goto free;
1323
1324 ib_set_client_data(device, &umad_client, umad_dev);
1325
1326 return;
1327
1328 err:
1329 while (--i >= s) {
1330 if (!rdma_cap_ib_mad(device, i))
1331 continue;
1332
1333 ib_umad_kill_port(&umad_dev->port[i - s]);
1334 }
1335 free:
1336 kobject_put(&umad_dev->kobj);
1337 }
1338
1339 static void ib_umad_remove_one(struct ib_device *device, void *client_data)
1340 {
1341 struct ib_umad_device *umad_dev = client_data;
1342 int i;
1343
1344 if (!umad_dev)
1345 return;
1346
1347 for (i = 0; i <= rdma_end_port(device) - rdma_start_port(device); ++i) {
1348 if (rdma_cap_ib_mad(device, i + rdma_start_port(device)))
1349 ib_umad_kill_port(&umad_dev->port[i]);
1350 }
1351
1352 kobject_put(&umad_dev->kobj);
1353 }
1354
1355 static char *umad_devnode(struct device *dev, umode_t *mode)
1356 {
1357 return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
1358 }
1359
1360 static int __init ib_umad_init(void)
1361 {
1362 int ret;
1363
1364 ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2,
1365 "infiniband_mad");
1366 if (ret) {
1367 pr_err("couldn't register device number\n");
1368 goto out;
1369 }
1370
1371 umad_class = class_create(THIS_MODULE, "infiniband_mad");
1372 if (IS_ERR(umad_class)) {
1373 ret = PTR_ERR(umad_class);
1374 pr_err("couldn't create class infiniband_mad\n");
1375 goto out_chrdev;
1376 }
1377
1378 umad_class->devnode = umad_devnode;
1379
1380 ret = class_create_file(umad_class, &class_attr_abi_version.attr);
1381 if (ret) {
1382 pr_err("couldn't create abi_version attribute\n");
1383 goto out_class;
1384 }
1385
1386 ret = ib_register_client(&umad_client);
1387 if (ret) {
1388 pr_err("couldn't register ib_umad client\n");
1389 goto out_class;
1390 }
1391
1392 return 0;
1393
1394 out_class:
1395 class_destroy(umad_class);
1396
1397 out_chrdev:
1398 unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2);
1399
1400 out:
1401 return ret;
1402 }
1403
1404 static void __exit ib_umad_cleanup(void)
1405 {
1406 ib_unregister_client(&umad_client);
1407 class_destroy(umad_class);
1408 unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2);
1409 if (overflow_maj)
1410 unregister_chrdev_region(overflow_maj, IB_UMAD_MAX_PORTS * 2);
1411 }
1412
1413 module_init(ib_umad_init);
1414 module_exit(ib_umad_cleanup);
Linux with added FPC-III support