Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. | |
3cd96564 | 3 | * Copyright (c) 2005 Voltaire, Inc. All rights reserved. |
cb183a06 | 4 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
2fe7e6f7 | 5 | * Copyright (c) 2008 Cisco. All rights reserved. |
1da177e4 LT |
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. | |
1da177e4 LT |
34 | */ |
35 | ||
f426a40e IW |
36 | #define pr_fmt(fmt) "user_mad: " fmt |
37 | ||
1da177e4 LT |
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> | |
1da177e4 LT |
44 | #include <linux/dma-mapping.h> |
45 | #include <linux/poll.h> | |
2fe7e6f7 | 46 | #include <linux/mutex.h> |
1da177e4 | 47 | #include <linux/kref.h> |
a394f83b | 48 | #include <linux/compat.h> |
a99bbaf5 | 49 | #include <linux/sched.h> |
6188e10d | 50 | #include <linux/semaphore.h> |
5a0e3ad6 | 51 | #include <linux/slab.h> |
1da177e4 LT |
52 | |
53 | #include <asm/uaccess.h> | |
1da177e4 | 54 | |
a4d61e84 RD |
55 | #include <rdma/ib_mad.h> |
56 | #include <rdma/ib_user_mad.h> | |
1da177e4 LT |
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 | ||
a74968f8 | 70 | /* |
6aa2a86e AC |
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 | |
a74968f8 RD |
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 | * | |
6aa2a86e | 81 | * When destroying an ib_umad_device, we drop the module's reference. |
a74968f8 RD |
82 | */ |
83 | ||
1da177e4 | 84 | struct ib_umad_port { |
2b937afc | 85 | struct cdev cdev; |
f4e91eb4 | 86 | struct device *dev; |
1da177e4 | 87 | |
2b937afc | 88 | struct cdev sm_cdev; |
f4e91eb4 | 89 | struct device *sm_dev; |
1da177e4 LT |
90 | struct semaphore sm_sem; |
91 | ||
2fe7e6f7 | 92 | struct mutex file_mutex; |
0c99cb6d RD |
93 | struct list_head file_list; |
94 | ||
1da177e4 LT |
95 | struct ib_device *ib_dev; |
96 | struct ib_umad_device *umad_dev; | |
a74968f8 | 97 | int dev_num; |
1da177e4 LT |
98 | u8 port_num; |
99 | }; | |
100 | ||
101 | struct ib_umad_device { | |
60e1751c | 102 | struct kobject kobj; |
1da177e4 LT |
103 | struct ib_umad_port port[0]; |
104 | }; | |
105 | ||
106 | struct ib_umad_file { | |
2fe7e6f7 | 107 | struct mutex mutex; |
94382f35 RD |
108 | struct ib_umad_port *port; |
109 | struct list_head recv_list; | |
2527e681 | 110 | struct list_head send_list; |
94382f35 | 111 | struct list_head port_list; |
2527e681 | 112 | spinlock_t send_lock; |
94382f35 RD |
113 | wait_queue_head_t recv_wait; |
114 | struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS]; | |
115 | int agents_dead; | |
2be8e3ee RD |
116 | u8 use_pkey_index; |
117 | u8 already_used; | |
1da177e4 LT |
118 | }; |
119 | ||
120 | struct ib_umad_packet { | |
cb183a06 | 121 | struct ib_mad_send_buf *msg; |
f36e1793 | 122 | struct ib_mad_recv_wc *recv_wc; |
1da177e4 | 123 | struct list_head list; |
cb183a06 | 124 | int length; |
cb183a06 | 125 | struct ib_user_mad mad; |
1da177e4 LT |
126 | }; |
127 | ||
a74968f8 RD |
128 | static struct class *umad_class; |
129 | ||
1da177e4 | 130 | static const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE); |
a74968f8 RD |
131 | |
132 | static DEFINE_SPINLOCK(port_lock); | |
9a4b65e3 | 133 | static DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS); |
1da177e4 LT |
134 | |
135 | static void ib_umad_add_one(struct ib_device *device); | |
136 | static void ib_umad_remove_one(struct ib_device *device); | |
137 | ||
60e1751c | 138 | static void ib_umad_release_dev(struct kobject *kobj) |
a74968f8 RD |
139 | { |
140 | struct ib_umad_device *dev = | |
60e1751c | 141 | container_of(kobj, struct ib_umad_device, kobj); |
a74968f8 RD |
142 | |
143 | kfree(dev); | |
144 | } | |
145 | ||
60e1751c BVA |
146 | static struct kobj_type ib_umad_dev_ktype = { |
147 | .release = ib_umad_release_dev, | |
148 | }; | |
149 | ||
2be8e3ee RD |
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 | ||
2fe7e6f7 | 156 | /* caller must hold file->mutex */ |
94382f35 RD |
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 | ||
1da177e4 LT |
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 | ||
2fe7e6f7 | 168 | mutex_lock(&file->mutex); |
94382f35 | 169 | |
cb183a06 HR |
170 | for (packet->mad.hdr.id = 0; |
171 | packet->mad.hdr.id < IB_UMAD_MAX_AGENTS; | |
172 | packet->mad.hdr.id++) | |
94382f35 | 173 | if (agent == __get_agent(file, packet->mad.hdr.id)) { |
1da177e4 | 174 | list_add_tail(&packet->list, &file->recv_list); |
1da177e4 LT |
175 | wake_up_interruptible(&file->recv_wait); |
176 | ret = 0; | |
177 | break; | |
178 | } | |
179 | ||
2fe7e6f7 | 180 | mutex_unlock(&file->mutex); |
1da177e4 LT |
181 | |
182 | return ret; | |
183 | } | |
184 | ||
2527e681 SH |
185 | static void dequeue_send(struct ib_umad_file *file, |
186 | struct ib_umad_packet *packet) | |
2fe7e6f7 | 187 | { |
2527e681 SH |
188 | spin_lock_irq(&file->send_lock); |
189 | list_del(&packet->list); | |
190 | spin_unlock_irq(&file->send_lock); | |
2fe7e6f7 | 191 | } |
2527e681 | 192 | |
1da177e4 LT |
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; | |
34816ad9 | 197 | struct ib_umad_packet *packet = send_wc->send_buf->context[0]; |
1da177e4 | 198 | |
2527e681 | 199 | dequeue_send(file, packet); |
34816ad9 | 200 | ib_destroy_ah(packet->msg->ah); |
cb183a06 | 201 | ib_free_send_mad(packet->msg); |
1da177e4 LT |
202 | |
203 | if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) { | |
f36e1793 JM |
204 | packet->length = IB_MGMT_MAD_HDR; |
205 | packet->mad.hdr.status = ETIMEDOUT; | |
206 | if (!queue_packet(file, agent, packet)) | |
207 | return; | |
cb183a06 | 208 | } |
1da177e4 LT |
209 | kfree(packet); |
210 | } | |
211 | ||
212 | static void recv_handler(struct ib_mad_agent *agent, | |
213 | struct ib_mad_recv_wc *mad_recv_wc) | |
214 | { | |
215 | struct ib_umad_file *file = agent->context; | |
216 | struct ib_umad_packet *packet; | |
217 | ||
218 | if (mad_recv_wc->wc->status != IB_WC_SUCCESS) | |
f36e1793 | 219 | goto err1; |
1da177e4 | 220 | |
f36e1793 | 221 | packet = kzalloc(sizeof *packet, GFP_KERNEL); |
1da177e4 | 222 | if (!packet) |
f36e1793 | 223 | goto err1; |
1da177e4 | 224 | |
f36e1793 JM |
225 | packet->length = mad_recv_wc->mad_len; |
226 | packet->recv_wc = mad_recv_wc; | |
1da177e4 | 227 | |
2be8e3ee RD |
228 | packet->mad.hdr.status = 0; |
229 | packet->mad.hdr.length = hdr_size(file) + mad_recv_wc->mad_len; | |
230 | packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp); | |
231 | packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid); | |
232 | packet->mad.hdr.sl = mad_recv_wc->wc->sl; | |
233 | packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits; | |
234 | packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index; | |
cb183a06 HR |
235 | packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH); |
236 | if (packet->mad.hdr.grh_present) { | |
aeba84a9 SH |
237 | struct ib_ah_attr ah_attr; |
238 | ||
239 | ib_init_ah_from_wc(agent->device, agent->port_num, | |
240 | mad_recv_wc->wc, mad_recv_wc->recv_buf.grh, | |
241 | &ah_attr); | |
242 | ||
243 | packet->mad.hdr.gid_index = ah_attr.grh.sgid_index; | |
244 | packet->mad.hdr.hop_limit = ah_attr.grh.hop_limit; | |
245 | packet->mad.hdr.traffic_class = ah_attr.grh.traffic_class; | |
246 | memcpy(packet->mad.hdr.gid, &ah_attr.grh.dgid, 16); | |
247 | packet->mad.hdr.flow_label = cpu_to_be32(ah_attr.grh.flow_label); | |
1da177e4 LT |
248 | } |
249 | ||
250 | if (queue_packet(file, agent, packet)) | |
f36e1793 JM |
251 | goto err2; |
252 | return; | |
1da177e4 | 253 | |
f36e1793 JM |
254 | err2: |
255 | kfree(packet); | |
256 | err1: | |
1da177e4 LT |
257 | ib_free_recv_mad(mad_recv_wc); |
258 | } | |
259 | ||
2be8e3ee RD |
260 | static ssize_t copy_recv_mad(struct ib_umad_file *file, char __user *buf, |
261 | struct ib_umad_packet *packet, size_t count) | |
f36e1793 JM |
262 | { |
263 | struct ib_mad_recv_buf *recv_buf; | |
264 | int left, seg_payload, offset, max_seg_payload; | |
8e4349d1 | 265 | size_t seg_size; |
f36e1793 | 266 | |
f36e1793 | 267 | recv_buf = &packet->recv_wc->recv_buf; |
8e4349d1 IW |
268 | seg_size = packet->recv_wc->mad_seg_size; |
269 | ||
270 | /* We need enough room to copy the first (or only) MAD segment. */ | |
271 | if ((packet->length <= seg_size && | |
2be8e3ee | 272 | count < hdr_size(file) + packet->length) || |
8e4349d1 IW |
273 | (packet->length > seg_size && |
274 | count < hdr_size(file) + seg_size)) | |
f36e1793 JM |
275 | return -EINVAL; |
276 | ||
2be8e3ee | 277 | if (copy_to_user(buf, &packet->mad, hdr_size(file))) |
f36e1793 JM |
278 | return -EFAULT; |
279 | ||
2be8e3ee | 280 | buf += hdr_size(file); |
8e4349d1 | 281 | seg_payload = min_t(int, packet->length, seg_size); |
f36e1793 JM |
282 | if (copy_to_user(buf, recv_buf->mad, seg_payload)) |
283 | return -EFAULT; | |
284 | ||
285 | if (seg_payload < packet->length) { | |
286 | /* | |
287 | * Multipacket RMPP MAD message. Copy remainder of message. | |
288 | * Note that last segment may have a shorter payload. | |
289 | */ | |
2be8e3ee | 290 | if (count < hdr_size(file) + packet->length) { |
f36e1793 JM |
291 | /* |
292 | * The buffer is too small, return the first RMPP segment, | |
293 | * which includes the RMPP message length. | |
294 | */ | |
295 | return -ENOSPC; | |
296 | } | |
618a3c03 | 297 | offset = ib_get_mad_data_offset(recv_buf->mad->mad_hdr.mgmt_class); |
8e4349d1 | 298 | max_seg_payload = seg_size - offset; |
f36e1793 JM |
299 | |
300 | for (left = packet->length - seg_payload, buf += seg_payload; | |
301 | left; left -= seg_payload, buf += seg_payload) { | |
302 | recv_buf = container_of(recv_buf->list.next, | |
303 | struct ib_mad_recv_buf, list); | |
304 | seg_payload = min(left, max_seg_payload); | |
305 | if (copy_to_user(buf, ((void *) recv_buf->mad) + offset, | |
306 | seg_payload)) | |
307 | return -EFAULT; | |
308 | } | |
309 | } | |
2be8e3ee | 310 | return hdr_size(file) + packet->length; |
f36e1793 JM |
311 | } |
312 | ||
2be8e3ee RD |
313 | static ssize_t copy_send_mad(struct ib_umad_file *file, char __user *buf, |
314 | struct ib_umad_packet *packet, size_t count) | |
f36e1793 | 315 | { |
2be8e3ee | 316 | ssize_t size = hdr_size(file) + packet->length; |
f36e1793 JM |
317 | |
318 | if (count < size) | |
319 | return -EINVAL; | |
320 | ||
2be8e3ee RD |
321 | if (copy_to_user(buf, &packet->mad, hdr_size(file))) |
322 | return -EFAULT; | |
323 | ||
324 | buf += hdr_size(file); | |
325 | ||
326 | if (copy_to_user(buf, packet->mad.data, packet->length)) | |
f36e1793 JM |
327 | return -EFAULT; |
328 | ||
329 | return size; | |
330 | } | |
331 | ||
1da177e4 LT |
332 | static ssize_t ib_umad_read(struct file *filp, char __user *buf, |
333 | size_t count, loff_t *pos) | |
334 | { | |
335 | struct ib_umad_file *file = filp->private_data; | |
336 | struct ib_umad_packet *packet; | |
337 | ssize_t ret; | |
338 | ||
2be8e3ee | 339 | if (count < hdr_size(file)) |
1da177e4 LT |
340 | return -EINVAL; |
341 | ||
2fe7e6f7 | 342 | mutex_lock(&file->mutex); |
1da177e4 LT |
343 | |
344 | while (list_empty(&file->recv_list)) { | |
2fe7e6f7 | 345 | mutex_unlock(&file->mutex); |
1da177e4 LT |
346 | |
347 | if (filp->f_flags & O_NONBLOCK) | |
348 | return -EAGAIN; | |
349 | ||
350 | if (wait_event_interruptible(file->recv_wait, | |
351 | !list_empty(&file->recv_list))) | |
352 | return -ERESTARTSYS; | |
353 | ||
2fe7e6f7 | 354 | mutex_lock(&file->mutex); |
1da177e4 LT |
355 | } |
356 | ||
357 | packet = list_entry(file->recv_list.next, struct ib_umad_packet, list); | |
358 | list_del(&packet->list); | |
359 | ||
2fe7e6f7 | 360 | mutex_unlock(&file->mutex); |
1da177e4 | 361 | |
f36e1793 | 362 | if (packet->recv_wc) |
2be8e3ee | 363 | ret = copy_recv_mad(file, buf, packet, count); |
1da177e4 | 364 | else |
2be8e3ee | 365 | ret = copy_send_mad(file, buf, packet, count); |
f36e1793 | 366 | |
cb183a06 HR |
367 | if (ret < 0) { |
368 | /* Requeue packet */ | |
2fe7e6f7 | 369 | mutex_lock(&file->mutex); |
cb183a06 | 370 | list_add(&packet->list, &file->recv_list); |
2fe7e6f7 | 371 | mutex_unlock(&file->mutex); |
f36e1793 JM |
372 | } else { |
373 | if (packet->recv_wc) | |
374 | ib_free_recv_mad(packet->recv_wc); | |
cb183a06 | 375 | kfree(packet); |
f36e1793 | 376 | } |
1da177e4 LT |
377 | return ret; |
378 | } | |
379 | ||
f36e1793 JM |
380 | static int copy_rmpp_mad(struct ib_mad_send_buf *msg, const char __user *buf) |
381 | { | |
382 | int left, seg; | |
383 | ||
384 | /* Copy class specific header */ | |
385 | if ((msg->hdr_len > IB_MGMT_RMPP_HDR) && | |
386 | copy_from_user(msg->mad + IB_MGMT_RMPP_HDR, buf + IB_MGMT_RMPP_HDR, | |
387 | msg->hdr_len - IB_MGMT_RMPP_HDR)) | |
388 | return -EFAULT; | |
389 | ||
390 | /* All headers are in place. Copy data segments. */ | |
391 | for (seg = 1, left = msg->data_len, buf += msg->hdr_len; left > 0; | |
392 | seg++, left -= msg->seg_size, buf += msg->seg_size) { | |
393 | if (copy_from_user(ib_get_rmpp_segment(msg, seg), buf, | |
394 | min(left, msg->seg_size))) | |
395 | return -EFAULT; | |
396 | } | |
397 | return 0; | |
398 | } | |
399 | ||
2527e681 SH |
400 | static int same_destination(struct ib_user_mad_hdr *hdr1, |
401 | struct ib_user_mad_hdr *hdr2) | |
402 | { | |
403 | if (!hdr1->grh_present && !hdr2->grh_present) | |
404 | return (hdr1->lid == hdr2->lid); | |
405 | ||
406 | if (hdr1->grh_present && hdr2->grh_present) | |
407 | return !memcmp(hdr1->gid, hdr2->gid, 16); | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | static int is_duplicate(struct ib_umad_file *file, | |
413 | struct ib_umad_packet *packet) | |
414 | { | |
415 | struct ib_umad_packet *sent_packet; | |
416 | struct ib_mad_hdr *sent_hdr, *hdr; | |
417 | ||
418 | hdr = (struct ib_mad_hdr *) packet->mad.data; | |
419 | list_for_each_entry(sent_packet, &file->send_list, list) { | |
420 | sent_hdr = (struct ib_mad_hdr *) sent_packet->mad.data; | |
421 | ||
422 | if ((hdr->tid != sent_hdr->tid) || | |
423 | (hdr->mgmt_class != sent_hdr->mgmt_class)) | |
424 | continue; | |
425 | ||
426 | /* | |
427 | * No need to be overly clever here. If two new operations have | |
428 | * the same TID, reject the second as a duplicate. This is more | |
429 | * restrictive than required by the spec. | |
430 | */ | |
96909308 IW |
431 | if (!ib_response_mad(hdr)) { |
432 | if (!ib_response_mad(sent_hdr)) | |
2527e681 SH |
433 | return 1; |
434 | continue; | |
96909308 | 435 | } else if (!ib_response_mad(sent_hdr)) |
2527e681 SH |
436 | continue; |
437 | ||
438 | if (same_destination(&packet->mad.hdr, &sent_packet->mad.hdr)) | |
439 | return 1; | |
440 | } | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
1da177e4 LT |
445 | static ssize_t ib_umad_write(struct file *filp, const char __user *buf, |
446 | size_t count, loff_t *pos) | |
447 | { | |
448 | struct ib_umad_file *file = filp->private_data; | |
449 | struct ib_umad_packet *packet; | |
450 | struct ib_mad_agent *agent; | |
451 | struct ib_ah_attr ah_attr; | |
34816ad9 | 452 | struct ib_ah *ah; |
cb183a06 | 453 | struct ib_rmpp_mad *rmpp_mad; |
97f52eb4 | 454 | __be64 *tid; |
f36e1793 | 455 | int ret, data_len, hdr_len, copy_offset, rmpp_active; |
8e4349d1 | 456 | u8 base_version; |
1da177e4 | 457 | |
2be8e3ee | 458 | if (count < hdr_size(file) + IB_MGMT_RMPP_HDR) |
1da177e4 LT |
459 | return -EINVAL; |
460 | ||
f36e1793 | 461 | packet = kzalloc(sizeof *packet + IB_MGMT_RMPP_HDR, GFP_KERNEL); |
1da177e4 LT |
462 | if (!packet) |
463 | return -ENOMEM; | |
464 | ||
2be8e3ee | 465 | if (copy_from_user(&packet->mad, buf, hdr_size(file))) { |
cb183a06 HR |
466 | ret = -EFAULT; |
467 | goto err; | |
1da177e4 LT |
468 | } |
469 | ||
caf6e3f2 | 470 | if (packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) { |
1da177e4 LT |
471 | ret = -EINVAL; |
472 | goto err; | |
473 | } | |
474 | ||
2be8e3ee RD |
475 | buf += hdr_size(file); |
476 | ||
477 | if (copy_from_user(packet->mad.data, buf, IB_MGMT_RMPP_HDR)) { | |
478 | ret = -EFAULT; | |
479 | goto err; | |
480 | } | |
481 | ||
2fe7e6f7 | 482 | mutex_lock(&file->mutex); |
1da177e4 | 483 | |
94382f35 | 484 | agent = __get_agent(file, packet->mad.hdr.id); |
1da177e4 LT |
485 | if (!agent) { |
486 | ret = -EINVAL; | |
487 | goto err_up; | |
488 | } | |
489 | ||
1da177e4 | 490 | memset(&ah_attr, 0, sizeof ah_attr); |
cb183a06 HR |
491 | ah_attr.dlid = be16_to_cpu(packet->mad.hdr.lid); |
492 | ah_attr.sl = packet->mad.hdr.sl; | |
493 | ah_attr.src_path_bits = packet->mad.hdr.path_bits; | |
1da177e4 | 494 | ah_attr.port_num = file->port->port_num; |
cb183a06 | 495 | if (packet->mad.hdr.grh_present) { |
1da177e4 | 496 | ah_attr.ah_flags = IB_AH_GRH; |
cb183a06 | 497 | memcpy(ah_attr.grh.dgid.raw, packet->mad.hdr.gid, 16); |
aeba84a9 | 498 | ah_attr.grh.sgid_index = packet->mad.hdr.gid_index; |
d3f2c67f AC |
499 | ah_attr.grh.flow_label = be32_to_cpu(packet->mad.hdr.flow_label); |
500 | ah_attr.grh.hop_limit = packet->mad.hdr.hop_limit; | |
cb183a06 | 501 | ah_attr.grh.traffic_class = packet->mad.hdr.traffic_class; |
1da177e4 LT |
502 | } |
503 | ||
34816ad9 SH |
504 | ah = ib_create_ah(agent->qp->pd, &ah_attr); |
505 | if (IS_ERR(ah)) { | |
506 | ret = PTR_ERR(ah); | |
1da177e4 LT |
507 | goto err_up; |
508 | } | |
509 | ||
cb183a06 | 510 | rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data; |
618a3c03 | 511 | hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); |
1471cb6c IW |
512 | |
513 | if (ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) | |
514 | && ib_mad_kernel_rmpp_agent(agent)) { | |
f36e1793 JM |
515 | copy_offset = IB_MGMT_RMPP_HDR; |
516 | rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & | |
1471cb6c IW |
517 | IB_MGMT_RMPP_FLAG_ACTIVE; |
518 | } else { | |
519 | copy_offset = IB_MGMT_MAD_HDR; | |
520 | rmpp_active = 0; | |
cb183a06 HR |
521 | } |
522 | ||
8e4349d1 | 523 | base_version = ((struct ib_mad_hdr *)&packet->mad.data)->base_version; |
2be8e3ee | 524 | data_len = count - hdr_size(file) - hdr_len; |
cb183a06 HR |
525 | packet->msg = ib_create_send_mad(agent, |
526 | be32_to_cpu(packet->mad.hdr.qpn), | |
2be8e3ee | 527 | packet->mad.hdr.pkey_index, rmpp_active, |
da2dfaa3 | 528 | hdr_len, data_len, GFP_KERNEL, |
8e4349d1 | 529 | base_version); |
cb183a06 HR |
530 | if (IS_ERR(packet->msg)) { |
531 | ret = PTR_ERR(packet->msg); | |
532 | goto err_ah; | |
533 | } | |
1da177e4 | 534 | |
d3f2c67f | 535 | packet->msg->ah = ah; |
34816ad9 | 536 | packet->msg->timeout_ms = packet->mad.hdr.timeout_ms; |
d3f2c67f | 537 | packet->msg->retries = packet->mad.hdr.retries; |
34816ad9 | 538 | packet->msg->context[0] = packet; |
1da177e4 | 539 | |
f36e1793 | 540 | /* Copy MAD header. Any RMPP header is already in place. */ |
cb0f0910 | 541 | memcpy(packet->msg->mad, packet->mad.data, IB_MGMT_MAD_HDR); |
f36e1793 JM |
542 | |
543 | if (!rmpp_active) { | |
544 | if (copy_from_user(packet->msg->mad + copy_offset, | |
545 | buf + copy_offset, | |
546 | hdr_len + data_len - copy_offset)) { | |
547 | ret = -EFAULT; | |
548 | goto err_msg; | |
549 | } | |
550 | } else { | |
551 | ret = copy_rmpp_mad(packet->msg, buf); | |
552 | if (ret) | |
553 | goto err_msg; | |
cb183a06 HR |
554 | } |
555 | ||
556 | /* | |
2527e681 SH |
557 | * Set the high-order part of the transaction ID to make MADs from |
558 | * different agents unique, and allow routing responses back to the | |
559 | * original requestor. | |
cb183a06 | 560 | */ |
2527e681 | 561 | if (!ib_response_mad(packet->msg->mad)) { |
089a1bed | 562 | tid = &((struct ib_mad_hdr *) packet->msg->mad)->tid; |
cb183a06 HR |
563 | *tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | |
564 | (be64_to_cpup(tid) & 0xffffffff)); | |
2527e681 SH |
565 | rmpp_mad->mad_hdr.tid = *tid; |
566 | } | |
567 | ||
1471cb6c IW |
568 | if (!ib_mad_kernel_rmpp_agent(agent) |
569 | && ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) | |
570 | && (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE)) { | |
571 | spin_lock_irq(&file->send_lock); | |
2527e681 | 572 | list_add_tail(&packet->list, &file->send_list); |
1471cb6c IW |
573 | spin_unlock_irq(&file->send_lock); |
574 | } else { | |
575 | spin_lock_irq(&file->send_lock); | |
576 | ret = is_duplicate(file, packet); | |
577 | if (!ret) | |
578 | list_add_tail(&packet->list, &file->send_list); | |
579 | spin_unlock_irq(&file->send_lock); | |
580 | if (ret) { | |
581 | ret = -EINVAL; | |
582 | goto err_msg; | |
583 | } | |
1da177e4 LT |
584 | } |
585 | ||
34816ad9 | 586 | ret = ib_post_send_mad(packet->msg, NULL); |
cb183a06 | 587 | if (ret) |
2527e681 | 588 | goto err_send; |
cb183a06 | 589 | |
2fe7e6f7 | 590 | mutex_unlock(&file->mutex); |
cb0f0910 | 591 | return count; |
cb183a06 | 592 | |
2527e681 SH |
593 | err_send: |
594 | dequeue_send(file, packet); | |
cb183a06 HR |
595 | err_msg: |
596 | ib_free_send_mad(packet->msg); | |
cb183a06 | 597 | err_ah: |
34816ad9 | 598 | ib_destroy_ah(ah); |
1da177e4 | 599 | err_up: |
2fe7e6f7 | 600 | mutex_unlock(&file->mutex); |
1da177e4 LT |
601 | err: |
602 | kfree(packet); | |
603 | return ret; | |
604 | } | |
605 | ||
606 | static unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait) | |
607 | { | |
608 | struct ib_umad_file *file = filp->private_data; | |
609 | ||
610 | /* we will always be able to post a MAD send */ | |
611 | unsigned int mask = POLLOUT | POLLWRNORM; | |
612 | ||
613 | poll_wait(filp, &file->recv_wait, wait); | |
614 | ||
615 | if (!list_empty(&file->recv_list)) | |
616 | mask |= POLLIN | POLLRDNORM; | |
617 | ||
618 | return mask; | |
619 | } | |
620 | ||
a394f83b RD |
621 | static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg, |
622 | int compat_method_mask) | |
1da177e4 LT |
623 | { |
624 | struct ib_user_mad_reg_req ureq; | |
625 | struct ib_mad_reg_req req; | |
2fe7e6f7 | 626 | struct ib_mad_agent *agent = NULL; |
1da177e4 LT |
627 | int agent_id; |
628 | int ret; | |
629 | ||
2fe7e6f7 RD |
630 | mutex_lock(&file->port->file_mutex); |
631 | mutex_lock(&file->mutex); | |
0c99cb6d RD |
632 | |
633 | if (!file->port->ib_dev) { | |
9ad13a42 IW |
634 | dev_notice(file->port->dev, |
635 | "ib_umad_reg_agent: invalid device\n"); | |
0c99cb6d RD |
636 | ret = -EPIPE; |
637 | goto out; | |
638 | } | |
1da177e4 | 639 | |
a394f83b | 640 | if (copy_from_user(&ureq, arg, sizeof ureq)) { |
1da177e4 LT |
641 | ret = -EFAULT; |
642 | goto out; | |
643 | } | |
644 | ||
645 | if (ureq.qpn != 0 && ureq.qpn != 1) { | |
9ad13a42 IW |
646 | dev_notice(file->port->dev, |
647 | "ib_umad_reg_agent: invalid QPN %d specified\n", | |
648 | ureq.qpn); | |
1da177e4 LT |
649 | ret = -EINVAL; |
650 | goto out; | |
651 | } | |
652 | ||
653 | for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) | |
94382f35 | 654 | if (!__get_agent(file, agent_id)) |
1da177e4 LT |
655 | goto found; |
656 | ||
9ad13a42 IW |
657 | dev_notice(file->port->dev, |
658 | "ib_umad_reg_agent: Max Agents (%u) reached\n", | |
659 | IB_UMAD_MAX_AGENTS); | |
1da177e4 LT |
660 | ret = -ENOMEM; |
661 | goto out; | |
662 | ||
663 | found: | |
0df3bb13 | 664 | if (ureq.mgmt_class) { |
0f29b46d | 665 | memset(&req, 0, sizeof(req)); |
0df3bb13 RD |
666 | req.mgmt_class = ureq.mgmt_class; |
667 | req.mgmt_class_version = ureq.mgmt_class_version; | |
a394f83b RD |
668 | memcpy(req.oui, ureq.oui, sizeof req.oui); |
669 | ||
670 | if (compat_method_mask) { | |
671 | u32 *umm = (u32 *) ureq.method_mask; | |
672 | int i; | |
673 | ||
674 | for (i = 0; i < BITS_TO_LONGS(IB_MGMT_MAX_METHODS); ++i) | |
675 | req.method_mask[i] = | |
676 | umm[i * 2] | ((u64) umm[i * 2 + 1] << 32); | |
677 | } else | |
678 | memcpy(req.method_mask, ureq.method_mask, | |
679 | sizeof req.method_mask); | |
0df3bb13 | 680 | } |
1da177e4 LT |
681 | |
682 | agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, | |
683 | ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, | |
0df3bb13 | 684 | ureq.mgmt_class ? &req : NULL, |
cb183a06 | 685 | ureq.rmpp_version, |
0f29b46d | 686 | send_handler, recv_handler, file, 0); |
1da177e4 LT |
687 | if (IS_ERR(agent)) { |
688 | ret = PTR_ERR(agent); | |
2fe7e6f7 | 689 | agent = NULL; |
1da177e4 LT |
690 | goto out; |
691 | } | |
692 | ||
1da177e4 LT |
693 | if (put_user(agent_id, |
694 | (u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) { | |
695 | ret = -EFAULT; | |
ec914c52 | 696 | goto out; |
1da177e4 LT |
697 | } |
698 | ||
2be8e3ee RD |
699 | if (!file->already_used) { |
700 | file->already_used = 1; | |
701 | if (!file->use_pkey_index) { | |
f426a40e IW |
702 | dev_warn(file->port->dev, |
703 | "process %s did not enable P_Key index support.\n", | |
704 | current->comm); | |
705 | dev_warn(file->port->dev, | |
706 | " Documentation/infiniband/user_mad.txt has info on the new ABI.\n"); | |
2be8e3ee RD |
707 | } |
708 | } | |
709 | ||
2f76e829 | 710 | file->agent[agent_id] = agent; |
1da177e4 | 711 | ret = 0; |
2f76e829 | 712 | |
1da177e4 | 713 | out: |
2fe7e6f7 RD |
714 | mutex_unlock(&file->mutex); |
715 | ||
716 | if (ret && agent) | |
717 | ib_unregister_mad_agent(agent); | |
718 | ||
719 | mutex_unlock(&file->port->file_mutex); | |
720 | ||
1da177e4 LT |
721 | return ret; |
722 | } | |
723 | ||
0f29b46d IW |
724 | static int ib_umad_reg_agent2(struct ib_umad_file *file, void __user *arg) |
725 | { | |
726 | struct ib_user_mad_reg_req2 ureq; | |
727 | struct ib_mad_reg_req req; | |
728 | struct ib_mad_agent *agent = NULL; | |
729 | int agent_id; | |
730 | int ret; | |
731 | ||
732 | mutex_lock(&file->port->file_mutex); | |
733 | mutex_lock(&file->mutex); | |
734 | ||
735 | if (!file->port->ib_dev) { | |
736 | dev_notice(file->port->dev, | |
737 | "ib_umad_reg_agent2: invalid device\n"); | |
738 | ret = -EPIPE; | |
739 | goto out; | |
740 | } | |
741 | ||
742 | if (copy_from_user(&ureq, arg, sizeof(ureq))) { | |
743 | ret = -EFAULT; | |
744 | goto out; | |
745 | } | |
746 | ||
747 | if (ureq.qpn != 0 && ureq.qpn != 1) { | |
748 | dev_notice(file->port->dev, | |
749 | "ib_umad_reg_agent2: invalid QPN %d specified\n", | |
750 | ureq.qpn); | |
751 | ret = -EINVAL; | |
752 | goto out; | |
753 | } | |
754 | ||
755 | if (ureq.flags & ~IB_USER_MAD_REG_FLAGS_CAP) { | |
756 | dev_notice(file->port->dev, | |
757 | "ib_umad_reg_agent2 failed: invalid registration flags specified 0x%x; supported 0x%x\n", | |
758 | ureq.flags, IB_USER_MAD_REG_FLAGS_CAP); | |
759 | ret = -EINVAL; | |
760 | ||
761 | if (put_user((u32)IB_USER_MAD_REG_FLAGS_CAP, | |
762 | (u32 __user *) (arg + offsetof(struct | |
763 | ib_user_mad_reg_req2, flags)))) | |
764 | ret = -EFAULT; | |
765 | ||
766 | goto out; | |
767 | } | |
768 | ||
769 | for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) | |
770 | if (!__get_agent(file, agent_id)) | |
771 | goto found; | |
772 | ||
773 | dev_notice(file->port->dev, | |
774 | "ib_umad_reg_agent2: Max Agents (%u) reached\n", | |
775 | IB_UMAD_MAX_AGENTS); | |
776 | ret = -ENOMEM; | |
777 | goto out; | |
778 | ||
779 | found: | |
780 | if (ureq.mgmt_class) { | |
781 | memset(&req, 0, sizeof(req)); | |
782 | req.mgmt_class = ureq.mgmt_class; | |
783 | req.mgmt_class_version = ureq.mgmt_class_version; | |
784 | if (ureq.oui & 0xff000000) { | |
785 | dev_notice(file->port->dev, | |
786 | "ib_umad_reg_agent2 failed: oui invalid 0x%08x\n", | |
787 | ureq.oui); | |
788 | ret = -EINVAL; | |
789 | goto out; | |
790 | } | |
791 | req.oui[2] = ureq.oui & 0x0000ff; | |
792 | req.oui[1] = (ureq.oui & 0x00ff00) >> 8; | |
793 | req.oui[0] = (ureq.oui & 0xff0000) >> 16; | |
794 | memcpy(req.method_mask, ureq.method_mask, | |
795 | sizeof(req.method_mask)); | |
796 | } | |
797 | ||
798 | agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, | |
799 | ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, | |
800 | ureq.mgmt_class ? &req : NULL, | |
801 | ureq.rmpp_version, | |
802 | send_handler, recv_handler, file, | |
803 | ureq.flags); | |
804 | if (IS_ERR(agent)) { | |
805 | ret = PTR_ERR(agent); | |
806 | agent = NULL; | |
807 | goto out; | |
808 | } | |
809 | ||
810 | if (put_user(agent_id, | |
811 | (u32 __user *)(arg + | |
812 | offsetof(struct ib_user_mad_reg_req2, id)))) { | |
813 | ret = -EFAULT; | |
814 | goto out; | |
815 | } | |
816 | ||
817 | if (!file->already_used) { | |
818 | file->already_used = 1; | |
819 | file->use_pkey_index = 1; | |
820 | } | |
821 | ||
822 | file->agent[agent_id] = agent; | |
823 | ret = 0; | |
824 | ||
825 | out: | |
826 | mutex_unlock(&file->mutex); | |
827 | ||
828 | if (ret && agent) | |
829 | ib_unregister_mad_agent(agent); | |
830 | ||
831 | mutex_unlock(&file->port->file_mutex); | |
832 | ||
833 | return ret; | |
834 | } | |
835 | ||
836 | ||
a394f83b | 837 | static int ib_umad_unreg_agent(struct ib_umad_file *file, u32 __user *arg) |
1da177e4 | 838 | { |
2f76e829 | 839 | struct ib_mad_agent *agent = NULL; |
1da177e4 LT |
840 | u32 id; |
841 | int ret = 0; | |
842 | ||
a394f83b | 843 | if (get_user(id, arg)) |
2f76e829 | 844 | return -EFAULT; |
1da177e4 | 845 | |
2fe7e6f7 RD |
846 | mutex_lock(&file->port->file_mutex); |
847 | mutex_lock(&file->mutex); | |
1da177e4 | 848 | |
caf6e3f2 | 849 | if (id >= IB_UMAD_MAX_AGENTS || !__get_agent(file, id)) { |
1da177e4 LT |
850 | ret = -EINVAL; |
851 | goto out; | |
852 | } | |
853 | ||
2f76e829 | 854 | agent = file->agent[id]; |
1da177e4 LT |
855 | file->agent[id] = NULL; |
856 | ||
857 | out: | |
2fe7e6f7 | 858 | mutex_unlock(&file->mutex); |
2f76e829 | 859 | |
ec914c52 | 860 | if (agent) |
2f76e829 | 861 | ib_unregister_mad_agent(agent); |
2f76e829 | 862 | |
2fe7e6f7 RD |
863 | mutex_unlock(&file->port->file_mutex); |
864 | ||
1da177e4 LT |
865 | return ret; |
866 | } | |
867 | ||
2be8e3ee RD |
868 | static long ib_umad_enable_pkey(struct ib_umad_file *file) |
869 | { | |
870 | int ret = 0; | |
871 | ||
2fe7e6f7 | 872 | mutex_lock(&file->mutex); |
2be8e3ee RD |
873 | if (file->already_used) |
874 | ret = -EINVAL; | |
875 | else | |
876 | file->use_pkey_index = 1; | |
2fe7e6f7 | 877 | mutex_unlock(&file->mutex); |
2be8e3ee RD |
878 | |
879 | return ret; | |
880 | } | |
881 | ||
cb183a06 HR |
882 | static long ib_umad_ioctl(struct file *filp, unsigned int cmd, |
883 | unsigned long arg) | |
1da177e4 LT |
884 | { |
885 | switch (cmd) { | |
886 | case IB_USER_MAD_REGISTER_AGENT: | |
a394f83b | 887 | return ib_umad_reg_agent(filp->private_data, (void __user *) arg, 0); |
1da177e4 | 888 | case IB_USER_MAD_UNREGISTER_AGENT: |
a394f83b | 889 | return ib_umad_unreg_agent(filp->private_data, (__u32 __user *) arg); |
2be8e3ee RD |
890 | case IB_USER_MAD_ENABLE_PKEY: |
891 | return ib_umad_enable_pkey(filp->private_data); | |
0f29b46d IW |
892 | case IB_USER_MAD_REGISTER_AGENT2: |
893 | return ib_umad_reg_agent2(filp->private_data, (void __user *) arg); | |
1da177e4 LT |
894 | default: |
895 | return -ENOIOCTLCMD; | |
896 | } | |
897 | } | |
898 | ||
a394f83b RD |
899 | #ifdef CONFIG_COMPAT |
900 | static long ib_umad_compat_ioctl(struct file *filp, unsigned int cmd, | |
901 | unsigned long arg) | |
902 | { | |
903 | switch (cmd) { | |
904 | case IB_USER_MAD_REGISTER_AGENT: | |
905 | return ib_umad_reg_agent(filp->private_data, compat_ptr(arg), 1); | |
906 | case IB_USER_MAD_UNREGISTER_AGENT: | |
907 | return ib_umad_unreg_agent(filp->private_data, compat_ptr(arg)); | |
908 | case IB_USER_MAD_ENABLE_PKEY: | |
909 | return ib_umad_enable_pkey(filp->private_data); | |
0f29b46d IW |
910 | case IB_USER_MAD_REGISTER_AGENT2: |
911 | return ib_umad_reg_agent2(filp->private_data, compat_ptr(arg)); | |
a394f83b RD |
912 | default: |
913 | return -ENOIOCTLCMD; | |
914 | } | |
915 | } | |
916 | #endif | |
917 | ||
feae1ef1 RD |
918 | /* |
919 | * ib_umad_open() does not need the BKL: | |
920 | * | |
6aa2a86e | 921 | * - the ib_umad_port structures are properly reference counted, and |
feae1ef1 RD |
922 | * everything else is purely local to the file being created, so |
923 | * races against other open calls are not a problem; | |
924 | * - the ioctl method does not affect any global state outside of the | |
925 | * file structure being operated on; | |
feae1ef1 | 926 | */ |
1da177e4 LT |
927 | static int ib_umad_open(struct inode *inode, struct file *filp) |
928 | { | |
a74968f8 | 929 | struct ib_umad_port *port; |
1da177e4 | 930 | struct ib_umad_file *file; |
8ec0a0e6 | 931 | int ret = -ENXIO; |
1da177e4 | 932 | |
6aa2a86e | 933 | port = container_of(inode->i_cdev, struct ib_umad_port, cdev); |
a74968f8 | 934 | |
2fe7e6f7 | 935 | mutex_lock(&port->file_mutex); |
0c99cb6d | 936 | |
8ec0a0e6 | 937 | if (!port->ib_dev) |
0c99cb6d | 938 | goto out; |
0c99cb6d | 939 | |
8ec0a0e6 | 940 | ret = -ENOMEM; |
cb0f0910 | 941 | file = kzalloc(sizeof *file, GFP_KERNEL); |
8ec0a0e6 | 942 | if (!file) |
0c99cb6d | 943 | goto out; |
1da177e4 | 944 | |
2fe7e6f7 | 945 | mutex_init(&file->mutex); |
2527e681 | 946 | spin_lock_init(&file->send_lock); |
1da177e4 | 947 | INIT_LIST_HEAD(&file->recv_list); |
2527e681 | 948 | INIT_LIST_HEAD(&file->send_list); |
1da177e4 LT |
949 | init_waitqueue_head(&file->recv_wait); |
950 | ||
951 | file->port = port; | |
952 | filp->private_data = file; | |
953 | ||
0c99cb6d RD |
954 | list_add_tail(&file->port_list, &port->file_list); |
955 | ||
bc1db9af | 956 | ret = nonseekable_open(inode, filp); |
8ec0a0e6 BVA |
957 | if (ret) { |
958 | list_del(&file->port_list); | |
959 | kfree(file); | |
960 | goto out; | |
961 | } | |
962 | ||
60e1751c | 963 | kobject_get(&port->umad_dev->kobj); |
bc1db9af | 964 | |
0c99cb6d | 965 | out: |
2fe7e6f7 | 966 | mutex_unlock(&port->file_mutex); |
0c99cb6d | 967 | return ret; |
1da177e4 LT |
968 | } |
969 | ||
970 | static int ib_umad_close(struct inode *inode, struct file *filp) | |
971 | { | |
972 | struct ib_umad_file *file = filp->private_data; | |
a74968f8 | 973 | struct ib_umad_device *dev = file->port->umad_dev; |
561e148e | 974 | struct ib_umad_packet *packet, *tmp; |
94382f35 | 975 | int already_dead; |
1da177e4 LT |
976 | int i; |
977 | ||
2fe7e6f7 RD |
978 | mutex_lock(&file->port->file_mutex); |
979 | mutex_lock(&file->mutex); | |
94382f35 RD |
980 | |
981 | already_dead = file->agents_dead; | |
982 | file->agents_dead = 1; | |
1da177e4 | 983 | |
f36e1793 JM |
984 | list_for_each_entry_safe(packet, tmp, &file->recv_list, list) { |
985 | if (packet->recv_wc) | |
986 | ib_free_recv_mad(packet->recv_wc); | |
561e148e | 987 | kfree(packet); |
f36e1793 | 988 | } |
561e148e | 989 | |
0c99cb6d | 990 | list_del(&file->port_list); |
0c99cb6d | 991 | |
2fe7e6f7 | 992 | mutex_unlock(&file->mutex); |
94382f35 RD |
993 | |
994 | if (!already_dead) | |
995 | for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i) | |
996 | if (file->agent[i]) | |
997 | ib_unregister_mad_agent(file->agent[i]); | |
1da177e4 | 998 | |
2fe7e6f7 | 999 | mutex_unlock(&file->port->file_mutex); |
94382f35 RD |
1000 | |
1001 | kfree(file); | |
60e1751c | 1002 | kobject_put(&dev->kobj); |
a74968f8 | 1003 | |
1da177e4 LT |
1004 | return 0; |
1005 | } | |
1006 | ||
2b8693c0 | 1007 | static const struct file_operations umad_fops = { |
d3f2c67f AC |
1008 | .owner = THIS_MODULE, |
1009 | .read = ib_umad_read, | |
1010 | .write = ib_umad_write, | |
1011 | .poll = ib_umad_poll, | |
1da177e4 | 1012 | .unlocked_ioctl = ib_umad_ioctl, |
a394f83b | 1013 | #ifdef CONFIG_COMPAT |
d3f2c67f | 1014 | .compat_ioctl = ib_umad_compat_ioctl, |
a394f83b | 1015 | #endif |
d3f2c67f | 1016 | .open = ib_umad_open, |
bc1db9af RD |
1017 | .release = ib_umad_close, |
1018 | .llseek = no_llseek, | |
1da177e4 LT |
1019 | }; |
1020 | ||
1021 | static int ib_umad_sm_open(struct inode *inode, struct file *filp) | |
1022 | { | |
a74968f8 | 1023 | struct ib_umad_port *port; |
1da177e4 LT |
1024 | struct ib_port_modify props = { |
1025 | .set_port_cap_mask = IB_PORT_SM | |
1026 | }; | |
1027 | int ret; | |
1028 | ||
6aa2a86e | 1029 | port = container_of(inode->i_cdev, struct ib_umad_port, sm_cdev); |
a74968f8 | 1030 | |
1da177e4 | 1031 | if (filp->f_flags & O_NONBLOCK) { |
a74968f8 RD |
1032 | if (down_trylock(&port->sm_sem)) { |
1033 | ret = -EAGAIN; | |
1034 | goto fail; | |
1035 | } | |
1da177e4 | 1036 | } else { |
a74968f8 RD |
1037 | if (down_interruptible(&port->sm_sem)) { |
1038 | ret = -ERESTARTSYS; | |
1039 | goto fail; | |
1040 | } | |
1da177e4 LT |
1041 | } |
1042 | ||
1043 | ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); | |
8ec0a0e6 BVA |
1044 | if (ret) |
1045 | goto err_up_sem; | |
1da177e4 LT |
1046 | |
1047 | filp->private_data = port; | |
1048 | ||
8ec0a0e6 BVA |
1049 | ret = nonseekable_open(inode, filp); |
1050 | if (ret) | |
1051 | goto err_clr_sm_cap; | |
1052 | ||
60e1751c | 1053 | kobject_get(&port->umad_dev->kobj); |
8ec0a0e6 BVA |
1054 | |
1055 | return 0; | |
1056 | ||
1057 | err_clr_sm_cap: | |
1058 | swap(props.set_port_cap_mask, props.clr_port_cap_mask); | |
1059 | ib_modify_port(port->ib_dev, port->port_num, 0, &props); | |
1060 | ||
1061 | err_up_sem: | |
1062 | up(&port->sm_sem); | |
a74968f8 RD |
1063 | |
1064 | fail: | |
a74968f8 | 1065 | return ret; |
1da177e4 LT |
1066 | } |
1067 | ||
1068 | static int ib_umad_sm_close(struct inode *inode, struct file *filp) | |
1069 | { | |
1070 | struct ib_umad_port *port = filp->private_data; | |
1071 | struct ib_port_modify props = { | |
1072 | .clr_port_cap_mask = IB_PORT_SM | |
1073 | }; | |
0c99cb6d RD |
1074 | int ret = 0; |
1075 | ||
2fe7e6f7 | 1076 | mutex_lock(&port->file_mutex); |
0c99cb6d RD |
1077 | if (port->ib_dev) |
1078 | ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); | |
2fe7e6f7 | 1079 | mutex_unlock(&port->file_mutex); |
1da177e4 | 1080 | |
1da177e4 LT |
1081 | up(&port->sm_sem); |
1082 | ||
60e1751c | 1083 | kobject_put(&port->umad_dev->kobj); |
a74968f8 | 1084 | |
1da177e4 LT |
1085 | return ret; |
1086 | } | |
1087 | ||
2b8693c0 | 1088 | static const struct file_operations umad_sm_fops = { |
d3f2c67f AC |
1089 | .owner = THIS_MODULE, |
1090 | .open = ib_umad_sm_open, | |
bc1db9af RD |
1091 | .release = ib_umad_sm_close, |
1092 | .llseek = no_llseek, | |
1da177e4 LT |
1093 | }; |
1094 | ||
1095 | static struct ib_client umad_client = { | |
1096 | .name = "umad", | |
1097 | .add = ib_umad_add_one, | |
1098 | .remove = ib_umad_remove_one | |
1099 | }; | |
1100 | ||
f4e91eb4 TJ |
1101 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
1102 | char *buf) | |
1da177e4 | 1103 | { |
f4e91eb4 | 1104 | struct ib_umad_port *port = dev_get_drvdata(dev); |
1da177e4 | 1105 | |
a74968f8 RD |
1106 | if (!port) |
1107 | return -ENODEV; | |
1108 | ||
1da177e4 LT |
1109 | return sprintf(buf, "%s\n", port->ib_dev->name); |
1110 | } | |
f4e91eb4 | 1111 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
1da177e4 | 1112 | |
f4e91eb4 TJ |
1113 | static ssize_t show_port(struct device *dev, struct device_attribute *attr, |
1114 | char *buf) | |
1da177e4 | 1115 | { |
f4e91eb4 | 1116 | struct ib_umad_port *port = dev_get_drvdata(dev); |
1da177e4 | 1117 | |
a74968f8 RD |
1118 | if (!port) |
1119 | return -ENODEV; | |
1120 | ||
1da177e4 LT |
1121 | return sprintf(buf, "%d\n", port->port_num); |
1122 | } | |
f4e91eb4 | 1123 | static DEVICE_ATTR(port, S_IRUGO, show_port, NULL); |
1da177e4 | 1124 | |
0933e2d9 AK |
1125 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
1126 | __stringify(IB_USER_MAD_ABI_VERSION)); | |
1da177e4 | 1127 | |
8698d3fe AC |
1128 | static dev_t overflow_maj; |
1129 | static DECLARE_BITMAP(overflow_map, IB_UMAD_MAX_PORTS); | |
f426a40e | 1130 | static int find_overflow_devnum(struct ib_device *device) |
8698d3fe AC |
1131 | { |
1132 | int ret; | |
1133 | ||
1134 | if (!overflow_maj) { | |
1135 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UMAD_MAX_PORTS * 2, | |
1136 | "infiniband_mad"); | |
1137 | if (ret) { | |
f426a40e IW |
1138 | dev_err(&device->dev, |
1139 | "couldn't register dynamic device number\n"); | |
8698d3fe AC |
1140 | return ret; |
1141 | } | |
1142 | } | |
1143 | ||
1144 | ret = find_first_zero_bit(overflow_map, IB_UMAD_MAX_PORTS); | |
1145 | if (ret >= IB_UMAD_MAX_PORTS) | |
1146 | return -1; | |
1147 | ||
1148 | return ret; | |
1149 | } | |
1150 | ||
1da177e4 | 1151 | static int ib_umad_init_port(struct ib_device *device, int port_num, |
60e1751c | 1152 | struct ib_umad_device *umad_dev, |
1da177e4 LT |
1153 | struct ib_umad_port *port) |
1154 | { | |
d451b8df | 1155 | int devnum; |
dc2ed5e3 | 1156 | dev_t base; |
d451b8df | 1157 | |
a74968f8 | 1158 | spin_lock(&port_lock); |
d451b8df AC |
1159 | devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS); |
1160 | if (devnum >= IB_UMAD_MAX_PORTS) { | |
a74968f8 | 1161 | spin_unlock(&port_lock); |
f426a40e | 1162 | devnum = find_overflow_devnum(device); |
8698d3fe AC |
1163 | if (devnum < 0) |
1164 | return -1; | |
1165 | ||
1166 | spin_lock(&port_lock); | |
1167 | port->dev_num = devnum + IB_UMAD_MAX_PORTS; | |
1168 | base = devnum + overflow_maj; | |
1169 | set_bit(devnum, overflow_map); | |
1170 | } else { | |
1171 | port->dev_num = devnum; | |
1172 | base = devnum + base_dev; | |
1173 | set_bit(devnum, dev_map); | |
1da177e4 | 1174 | } |
a74968f8 | 1175 | spin_unlock(&port_lock); |
1da177e4 LT |
1176 | |
1177 | port->ib_dev = device; | |
1178 | port->port_num = port_num; | |
557d0540 | 1179 | sema_init(&port->sm_sem, 1); |
2fe7e6f7 | 1180 | mutex_init(&port->file_mutex); |
0c99cb6d | 1181 | INIT_LIST_HEAD(&port->file_list); |
1da177e4 | 1182 | |
2b937afc AC |
1183 | cdev_init(&port->cdev, &umad_fops); |
1184 | port->cdev.owner = THIS_MODULE; | |
60e1751c | 1185 | port->cdev.kobj.parent = &umad_dev->kobj; |
2b937afc | 1186 | kobject_set_name(&port->cdev.kobj, "umad%d", port->dev_num); |
dc2ed5e3 | 1187 | if (cdev_add(&port->cdev, base, 1)) |
1da177e4 LT |
1188 | goto err_cdev; |
1189 | ||
91bd418f | 1190 | port->dev = device_create(umad_class, device->dma_device, |
2b937afc | 1191 | port->cdev.dev, port, |
91bd418f | 1192 | "umad%d", port->dev_num); |
f4e91eb4 | 1193 | if (IS_ERR(port->dev)) |
a74968f8 | 1194 | goto err_cdev; |
1da177e4 | 1195 | |
f4e91eb4 TJ |
1196 | if (device_create_file(port->dev, &dev_attr_ibdev)) |
1197 | goto err_dev; | |
1198 | if (device_create_file(port->dev, &dev_attr_port)) | |
1199 | goto err_dev; | |
1200 | ||
dc2ed5e3 | 1201 | base += IB_UMAD_MAX_PORTS; |
2b937afc AC |
1202 | cdev_init(&port->sm_cdev, &umad_sm_fops); |
1203 | port->sm_cdev.owner = THIS_MODULE; | |
60e1751c | 1204 | port->sm_cdev.kobj.parent = &umad_dev->kobj; |
2b937afc | 1205 | kobject_set_name(&port->sm_cdev.kobj, "issm%d", port->dev_num); |
dc2ed5e3 | 1206 | if (cdev_add(&port->sm_cdev, base, 1)) |
a74968f8 | 1207 | goto err_sm_cdev; |
1da177e4 | 1208 | |
91bd418f | 1209 | port->sm_dev = device_create(umad_class, device->dma_device, |
2b937afc | 1210 | port->sm_cdev.dev, port, |
91bd418f | 1211 | "issm%d", port->dev_num); |
f4e91eb4 | 1212 | if (IS_ERR(port->sm_dev)) |
1da177e4 LT |
1213 | goto err_sm_cdev; |
1214 | ||
f4e91eb4 TJ |
1215 | if (device_create_file(port->sm_dev, &dev_attr_ibdev)) |
1216 | goto err_sm_dev; | |
1217 | if (device_create_file(port->sm_dev, &dev_attr_port)) | |
1218 | goto err_sm_dev; | |
1da177e4 LT |
1219 | |
1220 | return 0; | |
1221 | ||
f4e91eb4 | 1222 | err_sm_dev: |
2b937afc | 1223 | device_destroy(umad_class, port->sm_cdev.dev); |
1da177e4 LT |
1224 | |
1225 | err_sm_cdev: | |
2b937afc | 1226 | cdev_del(&port->sm_cdev); |
1da177e4 | 1227 | |
f4e91eb4 | 1228 | err_dev: |
2b937afc | 1229 | device_destroy(umad_class, port->cdev.dev); |
1da177e4 LT |
1230 | |
1231 | err_cdev: | |
2b937afc | 1232 | cdev_del(&port->cdev); |
8698d3fe AC |
1233 | if (port->dev_num < IB_UMAD_MAX_PORTS) |
1234 | clear_bit(devnum, dev_map); | |
1235 | else | |
1236 | clear_bit(devnum, overflow_map); | |
1da177e4 LT |
1237 | |
1238 | return -1; | |
1239 | } | |
1240 | ||
a74968f8 RD |
1241 | static void ib_umad_kill_port(struct ib_umad_port *port) |
1242 | { | |
0c99cb6d RD |
1243 | struct ib_umad_file *file; |
1244 | int id; | |
1245 | ||
f4e91eb4 TJ |
1246 | dev_set_drvdata(port->dev, NULL); |
1247 | dev_set_drvdata(port->sm_dev, NULL); | |
a74968f8 | 1248 | |
2b937afc AC |
1249 | device_destroy(umad_class, port->cdev.dev); |
1250 | device_destroy(umad_class, port->sm_cdev.dev); | |
a74968f8 | 1251 | |
2b937afc AC |
1252 | cdev_del(&port->cdev); |
1253 | cdev_del(&port->sm_cdev); | |
a74968f8 | 1254 | |
2fe7e6f7 | 1255 | mutex_lock(&port->file_mutex); |
0c99cb6d RD |
1256 | |
1257 | port->ib_dev = NULL; | |
1258 | ||
2fe7e6f7 RD |
1259 | list_for_each_entry(file, &port->file_list, port_list) { |
1260 | mutex_lock(&file->mutex); | |
94382f35 | 1261 | file->agents_dead = 1; |
2fe7e6f7 | 1262 | mutex_unlock(&file->mutex); |
94382f35 RD |
1263 | |
1264 | for (id = 0; id < IB_UMAD_MAX_AGENTS; ++id) | |
1265 | if (file->agent[id]) | |
1266 | ib_unregister_mad_agent(file->agent[id]); | |
94382f35 | 1267 | } |
0c99cb6d | 1268 | |
2fe7e6f7 | 1269 | mutex_unlock(&port->file_mutex); |
0c99cb6d | 1270 | |
8698d3fe AC |
1271 | if (port->dev_num < IB_UMAD_MAX_PORTS) |
1272 | clear_bit(port->dev_num, dev_map); | |
1273 | else | |
1274 | clear_bit(port->dev_num - IB_UMAD_MAX_PORTS, overflow_map); | |
a74968f8 RD |
1275 | } |
1276 | ||
1da177e4 LT |
1277 | static void ib_umad_add_one(struct ib_device *device) |
1278 | { | |
1279 | struct ib_umad_device *umad_dev; | |
1280 | int s, e, i; | |
827f2a8b | 1281 | int count = 0; |
1da177e4 | 1282 | |
ab8be619 IW |
1283 | s = rdma_start_port(device); |
1284 | e = rdma_end_port(device); | |
1da177e4 | 1285 | |
cb0f0910 | 1286 | umad_dev = kzalloc(sizeof *umad_dev + |
1da177e4 LT |
1287 | (e - s + 1) * sizeof (struct ib_umad_port), |
1288 | GFP_KERNEL); | |
1289 | if (!umad_dev) | |
1290 | return; | |
1291 | ||
60e1751c | 1292 | kobject_init(&umad_dev->kobj, &ib_umad_dev_ktype); |
1da177e4 | 1293 | |
1da177e4 | 1294 | for (i = s; i <= e; ++i) { |
c757dea8 | 1295 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b MW |
1296 | continue; |
1297 | ||
1da177e4 LT |
1298 | umad_dev->port[i - s].umad_dev = umad_dev; |
1299 | ||
60e1751c BVA |
1300 | if (ib_umad_init_port(device, i, umad_dev, |
1301 | &umad_dev->port[i - s])) | |
1da177e4 | 1302 | goto err; |
827f2a8b MW |
1303 | |
1304 | count++; | |
1da177e4 LT |
1305 | } |
1306 | ||
827f2a8b MW |
1307 | if (!count) |
1308 | goto free; | |
1309 | ||
1da177e4 LT |
1310 | ib_set_client_data(device, &umad_client, umad_dev); |
1311 | ||
1312 | return; | |
1313 | ||
1314 | err: | |
827f2a8b | 1315 | while (--i >= s) { |
c757dea8 | 1316 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b | 1317 | continue; |
1da177e4 | 1318 | |
827f2a8b MW |
1319 | ib_umad_kill_port(&umad_dev->port[i - s]); |
1320 | } | |
1321 | free: | |
60e1751c | 1322 | kobject_put(&umad_dev->kobj); |
1da177e4 LT |
1323 | } |
1324 | ||
1325 | static void ib_umad_remove_one(struct ib_device *device) | |
1326 | { | |
1327 | struct ib_umad_device *umad_dev = ib_get_client_data(device, &umad_client); | |
1328 | int i; | |
1329 | ||
1330 | if (!umad_dev) | |
1331 | return; | |
1332 | ||
ab8be619 | 1333 | for (i = 0; i <= rdma_end_port(device) - rdma_start_port(device); ++i) { |
26c45428 | 1334 | if (rdma_cap_ib_mad(device, i + rdma_start_port(device))) |
827f2a8b MW |
1335 | ib_umad_kill_port(&umad_dev->port[i]); |
1336 | } | |
1da177e4 | 1337 | |
60e1751c | 1338 | kobject_put(&umad_dev->kobj); |
1da177e4 LT |
1339 | } |
1340 | ||
2c9ede55 | 1341 | static char *umad_devnode(struct device *dev, umode_t *mode) |
c3af0980 RD |
1342 | { |
1343 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); | |
1344 | } | |
1345 | ||
1da177e4 LT |
1346 | static int __init ib_umad_init(void) |
1347 | { | |
1348 | int ret; | |
1349 | ||
1da177e4 LT |
1350 | ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2, |
1351 | "infiniband_mad"); | |
1352 | if (ret) { | |
f426a40e | 1353 | pr_err("couldn't register device number\n"); |
1da177e4 LT |
1354 | goto out; |
1355 | } | |
1356 | ||
a74968f8 RD |
1357 | umad_class = class_create(THIS_MODULE, "infiniband_mad"); |
1358 | if (IS_ERR(umad_class)) { | |
1359 | ret = PTR_ERR(umad_class); | |
f426a40e | 1360 | pr_err("couldn't create class infiniband_mad\n"); |
1da177e4 LT |
1361 | goto out_chrdev; |
1362 | } | |
1363 | ||
c3af0980 RD |
1364 | umad_class->devnode = umad_devnode; |
1365 | ||
0933e2d9 | 1366 | ret = class_create_file(umad_class, &class_attr_abi_version.attr); |
1da177e4 | 1367 | if (ret) { |
f426a40e | 1368 | pr_err("couldn't create abi_version attribute\n"); |
1da177e4 LT |
1369 | goto out_class; |
1370 | } | |
1371 | ||
1372 | ret = ib_register_client(&umad_client); | |
1373 | if (ret) { | |
f426a40e | 1374 | pr_err("couldn't register ib_umad client\n"); |
1da177e4 LT |
1375 | goto out_class; |
1376 | } | |
1377 | ||
1378 | return 0; | |
1379 | ||
1380 | out_class: | |
a74968f8 | 1381 | class_destroy(umad_class); |
1da177e4 LT |
1382 | |
1383 | out_chrdev: | |
1384 | unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); | |
1385 | ||
1386 | out: | |
1387 | return ret; | |
1388 | } | |
1389 | ||
1390 | static void __exit ib_umad_cleanup(void) | |
1391 | { | |
1392 | ib_unregister_client(&umad_client); | |
a74968f8 | 1393 | class_destroy(umad_class); |
1da177e4 | 1394 | unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); |
8698d3fe AC |
1395 | if (overflow_maj) |
1396 | unregister_chrdev_region(overflow_maj, IB_UMAD_MAX_PORTS * 2); | |
1da177e4 LT |
1397 | } |
1398 | ||
1399 | module_init(ib_umad_init); | |
1400 | module_exit(ib_umad_cleanup); |