Commit | Line | Data |
---|---|---|
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 { | |
102 | int start_port, end_port; | |
60e1751c | 103 | struct kobject kobj; |
1da177e4 LT |
104 | struct ib_umad_port port[0]; |
105 | }; | |
106 | ||
107 | struct ib_umad_file { | |
2fe7e6f7 | 108 | struct mutex mutex; |
94382f35 RD |
109 | struct ib_umad_port *port; |
110 | struct list_head recv_list; | |
2527e681 | 111 | struct list_head send_list; |
94382f35 | 112 | struct list_head port_list; |
2527e681 | 113 | spinlock_t send_lock; |
94382f35 RD |
114 | wait_queue_head_t recv_wait; |
115 | struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS]; | |
116 | int agents_dead; | |
2be8e3ee RD |
117 | u8 use_pkey_index; |
118 | u8 already_used; | |
1da177e4 LT |
119 | }; |
120 | ||
121 | struct ib_umad_packet { | |
cb183a06 | 122 | struct ib_mad_send_buf *msg; |
f36e1793 | 123 | struct ib_mad_recv_wc *recv_wc; |
1da177e4 | 124 | struct list_head list; |
cb183a06 | 125 | int length; |
cb183a06 | 126 | struct ib_user_mad mad; |
1da177e4 LT |
127 | }; |
128 | ||
a74968f8 RD |
129 | static struct class *umad_class; |
130 | ||
1da177e4 | 131 | static const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE); |
a74968f8 RD |
132 | |
133 | static DEFINE_SPINLOCK(port_lock); | |
9a4b65e3 | 134 | static DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS); |
1da177e4 LT |
135 | |
136 | static void ib_umad_add_one(struct ib_device *device); | |
137 | static void ib_umad_remove_one(struct ib_device *device); | |
138 | ||
60e1751c | 139 | static void ib_umad_release_dev(struct kobject *kobj) |
a74968f8 RD |
140 | { |
141 | struct ib_umad_device *dev = | |
60e1751c | 142 | container_of(kobj, struct ib_umad_device, kobj); |
a74968f8 RD |
143 | |
144 | kfree(dev); | |
145 | } | |
146 | ||
60e1751c BVA |
147 | static struct kobj_type ib_umad_dev_ktype = { |
148 | .release = ib_umad_release_dev, | |
149 | }; | |
150 | ||
2be8e3ee RD |
151 | static int hdr_size(struct ib_umad_file *file) |
152 | { | |
153 | return file->use_pkey_index ? sizeof (struct ib_user_mad_hdr) : | |
154 | sizeof (struct ib_user_mad_hdr_old); | |
155 | } | |
156 | ||
2fe7e6f7 | 157 | /* caller must hold file->mutex */ |
94382f35 RD |
158 | static struct ib_mad_agent *__get_agent(struct ib_umad_file *file, int id) |
159 | { | |
160 | return file->agents_dead ? NULL : file->agent[id]; | |
161 | } | |
162 | ||
1da177e4 LT |
163 | static int queue_packet(struct ib_umad_file *file, |
164 | struct ib_mad_agent *agent, | |
165 | struct ib_umad_packet *packet) | |
166 | { | |
167 | int ret = 1; | |
168 | ||
2fe7e6f7 | 169 | mutex_lock(&file->mutex); |
94382f35 | 170 | |
cb183a06 HR |
171 | for (packet->mad.hdr.id = 0; |
172 | packet->mad.hdr.id < IB_UMAD_MAX_AGENTS; | |
173 | packet->mad.hdr.id++) | |
94382f35 | 174 | if (agent == __get_agent(file, packet->mad.hdr.id)) { |
1da177e4 | 175 | list_add_tail(&packet->list, &file->recv_list); |
1da177e4 LT |
176 | wake_up_interruptible(&file->recv_wait); |
177 | ret = 0; | |
178 | break; | |
179 | } | |
180 | ||
2fe7e6f7 | 181 | mutex_unlock(&file->mutex); |
1da177e4 LT |
182 | |
183 | return ret; | |
184 | } | |
185 | ||
2527e681 SH |
186 | static void dequeue_send(struct ib_umad_file *file, |
187 | struct ib_umad_packet *packet) | |
2fe7e6f7 | 188 | { |
2527e681 SH |
189 | spin_lock_irq(&file->send_lock); |
190 | list_del(&packet->list); | |
191 | spin_unlock_irq(&file->send_lock); | |
2fe7e6f7 | 192 | } |
2527e681 | 193 | |
1da177e4 LT |
194 | static void send_handler(struct ib_mad_agent *agent, |
195 | struct ib_mad_send_wc *send_wc) | |
196 | { | |
197 | struct ib_umad_file *file = agent->context; | |
34816ad9 | 198 | struct ib_umad_packet *packet = send_wc->send_buf->context[0]; |
1da177e4 | 199 | |
2527e681 | 200 | dequeue_send(file, packet); |
34816ad9 | 201 | ib_destroy_ah(packet->msg->ah); |
cb183a06 | 202 | ib_free_send_mad(packet->msg); |
1da177e4 LT |
203 | |
204 | if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) { | |
f36e1793 JM |
205 | packet->length = IB_MGMT_MAD_HDR; |
206 | packet->mad.hdr.status = ETIMEDOUT; | |
207 | if (!queue_packet(file, agent, packet)) | |
208 | return; | |
cb183a06 | 209 | } |
1da177e4 LT |
210 | kfree(packet); |
211 | } | |
212 | ||
213 | static void recv_handler(struct ib_mad_agent *agent, | |
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) | |
f36e1793 | 220 | goto err1; |
1da177e4 | 221 | |
f36e1793 | 222 | packet = kzalloc(sizeof *packet, GFP_KERNEL); |
1da177e4 | 223 | if (!packet) |
f36e1793 | 224 | goto err1; |
1da177e4 | 225 | |
f36e1793 JM |
226 | packet->length = mad_recv_wc->mad_len; |
227 | packet->recv_wc = mad_recv_wc; | |
1da177e4 | 228 | |
2be8e3ee RD |
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 | packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid); | |
233 | packet->mad.hdr.sl = mad_recv_wc->wc->sl; | |
234 | packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits; | |
235 | packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index; | |
cb183a06 HR |
236 | packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH); |
237 | if (packet->mad.hdr.grh_present) { | |
aeba84a9 SH |
238 | struct ib_ah_attr ah_attr; |
239 | ||
240 | ib_init_ah_from_wc(agent->device, agent->port_num, | |
241 | mad_recv_wc->wc, mad_recv_wc->recv_buf.grh, | |
242 | &ah_attr); | |
243 | ||
244 | packet->mad.hdr.gid_index = ah_attr.grh.sgid_index; | |
245 | packet->mad.hdr.hop_limit = ah_attr.grh.hop_limit; | |
246 | packet->mad.hdr.traffic_class = ah_attr.grh.traffic_class; | |
247 | memcpy(packet->mad.hdr.gid, &ah_attr.grh.dgid, 16); | |
248 | packet->mad.hdr.flow_label = cpu_to_be32(ah_attr.grh.flow_label); | |
1da177e4 LT |
249 | } |
250 | ||
251 | if (queue_packet(file, agent, packet)) | |
f36e1793 JM |
252 | goto err2; |
253 | return; | |
1da177e4 | 254 | |
f36e1793 JM |
255 | err2: |
256 | kfree(packet); | |
257 | err1: | |
1da177e4 LT |
258 | ib_free_recv_mad(mad_recv_wc); |
259 | } | |
260 | ||
2be8e3ee RD |
261 | static ssize_t copy_recv_mad(struct ib_umad_file *file, char __user *buf, |
262 | struct ib_umad_packet *packet, size_t count) | |
f36e1793 JM |
263 | { |
264 | struct ib_mad_recv_buf *recv_buf; | |
265 | int left, seg_payload, offset, max_seg_payload; | |
266 | ||
267 | /* We need enough room to copy the first (or only) MAD segment. */ | |
268 | recv_buf = &packet->recv_wc->recv_buf; | |
269 | if ((packet->length <= sizeof (*recv_buf->mad) && | |
2be8e3ee | 270 | count < hdr_size(file) + packet->length) || |
f36e1793 | 271 | (packet->length > sizeof (*recv_buf->mad) && |
2be8e3ee | 272 | count < hdr_size(file) + sizeof (*recv_buf->mad))) |
f36e1793 JM |
273 | return -EINVAL; |
274 | ||
2be8e3ee | 275 | if (copy_to_user(buf, &packet->mad, hdr_size(file))) |
f36e1793 JM |
276 | return -EFAULT; |
277 | ||
2be8e3ee | 278 | buf += hdr_size(file); |
f36e1793 JM |
279 | seg_payload = min_t(int, packet->length, sizeof (*recv_buf->mad)); |
280 | if (copy_to_user(buf, recv_buf->mad, seg_payload)) | |
281 | return -EFAULT; | |
282 | ||
283 | if (seg_payload < packet->length) { | |
284 | /* | |
285 | * Multipacket RMPP MAD message. Copy remainder of message. | |
286 | * Note that last segment may have a shorter payload. | |
287 | */ | |
2be8e3ee | 288 | if (count < hdr_size(file) + packet->length) { |
f36e1793 JM |
289 | /* |
290 | * The buffer is too small, return the first RMPP segment, | |
291 | * which includes the RMPP message length. | |
292 | */ | |
293 | return -ENOSPC; | |
294 | } | |
618a3c03 | 295 | offset = ib_get_mad_data_offset(recv_buf->mad->mad_hdr.mgmt_class); |
f36e1793 JM |
296 | max_seg_payload = sizeof (struct ib_mad) - offset; |
297 | ||
298 | for (left = packet->length - seg_payload, buf += seg_payload; | |
299 | left; left -= seg_payload, buf += seg_payload) { | |
300 | recv_buf = container_of(recv_buf->list.next, | |
301 | struct ib_mad_recv_buf, list); | |
302 | seg_payload = min(left, max_seg_payload); | |
303 | if (copy_to_user(buf, ((void *) recv_buf->mad) + offset, | |
304 | seg_payload)) | |
305 | return -EFAULT; | |
306 | } | |
307 | } | |
2be8e3ee | 308 | return hdr_size(file) + packet->length; |
f36e1793 JM |
309 | } |
310 | ||
2be8e3ee RD |
311 | static ssize_t copy_send_mad(struct ib_umad_file *file, char __user *buf, |
312 | struct ib_umad_packet *packet, size_t count) | |
f36e1793 | 313 | { |
2be8e3ee | 314 | ssize_t size = hdr_size(file) + packet->length; |
f36e1793 JM |
315 | |
316 | if (count < size) | |
317 | return -EINVAL; | |
318 | ||
2be8e3ee RD |
319 | if (copy_to_user(buf, &packet->mad, hdr_size(file))) |
320 | return -EFAULT; | |
321 | ||
322 | buf += hdr_size(file); | |
323 | ||
324 | if (copy_to_user(buf, packet->mad.data, packet->length)) | |
f36e1793 JM |
325 | return -EFAULT; |
326 | ||
327 | return size; | |
328 | } | |
329 | ||
1da177e4 LT |
330 | static ssize_t ib_umad_read(struct file *filp, char __user *buf, |
331 | size_t count, loff_t *pos) | |
332 | { | |
333 | struct ib_umad_file *file = filp->private_data; | |
334 | struct ib_umad_packet *packet; | |
335 | ssize_t ret; | |
336 | ||
2be8e3ee | 337 | if (count < hdr_size(file)) |
1da177e4 LT |
338 | return -EINVAL; |
339 | ||
2fe7e6f7 | 340 | mutex_lock(&file->mutex); |
1da177e4 LT |
341 | |
342 | while (list_empty(&file->recv_list)) { | |
2fe7e6f7 | 343 | mutex_unlock(&file->mutex); |
1da177e4 LT |
344 | |
345 | if (filp->f_flags & O_NONBLOCK) | |
346 | return -EAGAIN; | |
347 | ||
348 | if (wait_event_interruptible(file->recv_wait, | |
349 | !list_empty(&file->recv_list))) | |
350 | return -ERESTARTSYS; | |
351 | ||
2fe7e6f7 | 352 | mutex_lock(&file->mutex); |
1da177e4 LT |
353 | } |
354 | ||
355 | packet = list_entry(file->recv_list.next, struct ib_umad_packet, list); | |
356 | list_del(&packet->list); | |
357 | ||
2fe7e6f7 | 358 | mutex_unlock(&file->mutex); |
1da177e4 | 359 | |
f36e1793 | 360 | if (packet->recv_wc) |
2be8e3ee | 361 | ret = copy_recv_mad(file, buf, packet, count); |
1da177e4 | 362 | else |
2be8e3ee | 363 | ret = copy_send_mad(file, buf, packet, count); |
f36e1793 | 364 | |
cb183a06 HR |
365 | if (ret < 0) { |
366 | /* Requeue packet */ | |
2fe7e6f7 | 367 | mutex_lock(&file->mutex); |
cb183a06 | 368 | list_add(&packet->list, &file->recv_list); |
2fe7e6f7 | 369 | mutex_unlock(&file->mutex); |
f36e1793 JM |
370 | } else { |
371 | if (packet->recv_wc) | |
372 | ib_free_recv_mad(packet->recv_wc); | |
cb183a06 | 373 | kfree(packet); |
f36e1793 | 374 | } |
1da177e4 LT |
375 | return ret; |
376 | } | |
377 | ||
f36e1793 JM |
378 | static int copy_rmpp_mad(struct ib_mad_send_buf *msg, const char __user *buf) |
379 | { | |
380 | int left, seg; | |
381 | ||
382 | /* Copy class specific header */ | |
383 | if ((msg->hdr_len > IB_MGMT_RMPP_HDR) && | |
384 | copy_from_user(msg->mad + IB_MGMT_RMPP_HDR, buf + IB_MGMT_RMPP_HDR, | |
385 | msg->hdr_len - IB_MGMT_RMPP_HDR)) | |
386 | return -EFAULT; | |
387 | ||
388 | /* All headers are in place. Copy data segments. */ | |
389 | for (seg = 1, left = msg->data_len, buf += msg->hdr_len; left > 0; | |
390 | seg++, left -= msg->seg_size, buf += msg->seg_size) { | |
391 | if (copy_from_user(ib_get_rmpp_segment(msg, seg), buf, | |
392 | min(left, msg->seg_size))) | |
393 | return -EFAULT; | |
394 | } | |
395 | return 0; | |
396 | } | |
397 | ||
2527e681 SH |
398 | static int same_destination(struct ib_user_mad_hdr *hdr1, |
399 | struct ib_user_mad_hdr *hdr2) | |
400 | { | |
401 | if (!hdr1->grh_present && !hdr2->grh_present) | |
402 | return (hdr1->lid == hdr2->lid); | |
403 | ||
404 | if (hdr1->grh_present && hdr2->grh_present) | |
405 | return !memcmp(hdr1->gid, hdr2->gid, 16); | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | static int is_duplicate(struct ib_umad_file *file, | |
411 | struct ib_umad_packet *packet) | |
412 | { | |
413 | struct ib_umad_packet *sent_packet; | |
414 | struct ib_mad_hdr *sent_hdr, *hdr; | |
415 | ||
416 | hdr = (struct ib_mad_hdr *) packet->mad.data; | |
417 | list_for_each_entry(sent_packet, &file->send_list, list) { | |
418 | sent_hdr = (struct ib_mad_hdr *) sent_packet->mad.data; | |
419 | ||
420 | if ((hdr->tid != sent_hdr->tid) || | |
421 | (hdr->mgmt_class != sent_hdr->mgmt_class)) | |
422 | continue; | |
423 | ||
424 | /* | |
425 | * No need to be overly clever here. If two new operations have | |
426 | * the same TID, reject the second as a duplicate. This is more | |
427 | * restrictive than required by the spec. | |
428 | */ | |
429 | if (!ib_response_mad((struct ib_mad *) hdr)) { | |
430 | if (!ib_response_mad((struct ib_mad *) sent_hdr)) | |
431 | return 1; | |
432 | continue; | |
433 | } else if (!ib_response_mad((struct ib_mad *) sent_hdr)) | |
434 | continue; | |
435 | ||
436 | if (same_destination(&packet->mad.hdr, &sent_packet->mad.hdr)) | |
437 | return 1; | |
438 | } | |
439 | ||
440 | return 0; | |
441 | } | |
442 | ||
1da177e4 LT |
443 | static ssize_t ib_umad_write(struct file *filp, const char __user *buf, |
444 | size_t count, loff_t *pos) | |
445 | { | |
446 | struct ib_umad_file *file = filp->private_data; | |
447 | struct ib_umad_packet *packet; | |
448 | struct ib_mad_agent *agent; | |
449 | struct ib_ah_attr ah_attr; | |
34816ad9 | 450 | struct ib_ah *ah; |
cb183a06 | 451 | struct ib_rmpp_mad *rmpp_mad; |
97f52eb4 | 452 | __be64 *tid; |
f36e1793 | 453 | int ret, data_len, hdr_len, copy_offset, rmpp_active; |
1da177e4 | 454 | |
2be8e3ee | 455 | if (count < hdr_size(file) + IB_MGMT_RMPP_HDR) |
1da177e4 LT |
456 | return -EINVAL; |
457 | ||
f36e1793 | 458 | packet = kzalloc(sizeof *packet + IB_MGMT_RMPP_HDR, GFP_KERNEL); |
1da177e4 LT |
459 | if (!packet) |
460 | return -ENOMEM; | |
461 | ||
2be8e3ee | 462 | if (copy_from_user(&packet->mad, buf, hdr_size(file))) { |
cb183a06 HR |
463 | ret = -EFAULT; |
464 | goto err; | |
1da177e4 LT |
465 | } |
466 | ||
caf6e3f2 | 467 | if (packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) { |
1da177e4 LT |
468 | ret = -EINVAL; |
469 | goto err; | |
470 | } | |
471 | ||
2be8e3ee RD |
472 | buf += hdr_size(file); |
473 | ||
474 | if (copy_from_user(packet->mad.data, buf, IB_MGMT_RMPP_HDR)) { | |
475 | ret = -EFAULT; | |
476 | goto err; | |
477 | } | |
478 | ||
2fe7e6f7 | 479 | mutex_lock(&file->mutex); |
1da177e4 | 480 | |
94382f35 | 481 | agent = __get_agent(file, packet->mad.hdr.id); |
1da177e4 LT |
482 | if (!agent) { |
483 | ret = -EINVAL; | |
484 | goto err_up; | |
485 | } | |
486 | ||
1da177e4 | 487 | memset(&ah_attr, 0, sizeof ah_attr); |
cb183a06 HR |
488 | ah_attr.dlid = be16_to_cpu(packet->mad.hdr.lid); |
489 | ah_attr.sl = packet->mad.hdr.sl; | |
490 | ah_attr.src_path_bits = packet->mad.hdr.path_bits; | |
1da177e4 | 491 | ah_attr.port_num = file->port->port_num; |
cb183a06 | 492 | if (packet->mad.hdr.grh_present) { |
1da177e4 | 493 | ah_attr.ah_flags = IB_AH_GRH; |
cb183a06 | 494 | memcpy(ah_attr.grh.dgid.raw, packet->mad.hdr.gid, 16); |
aeba84a9 | 495 | ah_attr.grh.sgid_index = packet->mad.hdr.gid_index; |
d3f2c67f AC |
496 | ah_attr.grh.flow_label = be32_to_cpu(packet->mad.hdr.flow_label); |
497 | ah_attr.grh.hop_limit = packet->mad.hdr.hop_limit; | |
cb183a06 | 498 | ah_attr.grh.traffic_class = packet->mad.hdr.traffic_class; |
1da177e4 LT |
499 | } |
500 | ||
34816ad9 SH |
501 | ah = ib_create_ah(agent->qp->pd, &ah_attr); |
502 | if (IS_ERR(ah)) { | |
503 | ret = PTR_ERR(ah); | |
1da177e4 LT |
504 | goto err_up; |
505 | } | |
506 | ||
cb183a06 | 507 | rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data; |
618a3c03 | 508 | hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); |
1471cb6c IW |
509 | |
510 | if (ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) | |
511 | && ib_mad_kernel_rmpp_agent(agent)) { | |
f36e1793 JM |
512 | copy_offset = IB_MGMT_RMPP_HDR; |
513 | rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & | |
1471cb6c IW |
514 | IB_MGMT_RMPP_FLAG_ACTIVE; |
515 | } else { | |
516 | copy_offset = IB_MGMT_MAD_HDR; | |
517 | rmpp_active = 0; | |
cb183a06 HR |
518 | } |
519 | ||
2be8e3ee | 520 | data_len = count - hdr_size(file) - hdr_len; |
cb183a06 HR |
521 | packet->msg = ib_create_send_mad(agent, |
522 | be32_to_cpu(packet->mad.hdr.qpn), | |
2be8e3ee RD |
523 | packet->mad.hdr.pkey_index, rmpp_active, |
524 | hdr_len, data_len, GFP_KERNEL); | |
cb183a06 HR |
525 | if (IS_ERR(packet->msg)) { |
526 | ret = PTR_ERR(packet->msg); | |
527 | goto err_ah; | |
528 | } | |
1da177e4 | 529 | |
d3f2c67f | 530 | packet->msg->ah = ah; |
34816ad9 | 531 | packet->msg->timeout_ms = packet->mad.hdr.timeout_ms; |
d3f2c67f | 532 | packet->msg->retries = packet->mad.hdr.retries; |
34816ad9 | 533 | packet->msg->context[0] = packet; |
1da177e4 | 534 | |
f36e1793 | 535 | /* Copy MAD header. Any RMPP header is already in place. */ |
cb0f0910 | 536 | memcpy(packet->msg->mad, packet->mad.data, IB_MGMT_MAD_HDR); |
f36e1793 JM |
537 | |
538 | if (!rmpp_active) { | |
539 | if (copy_from_user(packet->msg->mad + copy_offset, | |
540 | buf + copy_offset, | |
541 | hdr_len + data_len - copy_offset)) { | |
542 | ret = -EFAULT; | |
543 | goto err_msg; | |
544 | } | |
545 | } else { | |
546 | ret = copy_rmpp_mad(packet->msg, buf); | |
547 | if (ret) | |
548 | goto err_msg; | |
cb183a06 HR |
549 | } |
550 | ||
551 | /* | |
2527e681 SH |
552 | * Set the high-order part of the transaction ID to make MADs from |
553 | * different agents unique, and allow routing responses back to the | |
554 | * original requestor. | |
cb183a06 | 555 | */ |
2527e681 | 556 | if (!ib_response_mad(packet->msg->mad)) { |
089a1bed | 557 | tid = &((struct ib_mad_hdr *) packet->msg->mad)->tid; |
cb183a06 HR |
558 | *tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | |
559 | (be64_to_cpup(tid) & 0xffffffff)); | |
2527e681 SH |
560 | rmpp_mad->mad_hdr.tid = *tid; |
561 | } | |
562 | ||
1471cb6c IW |
563 | if (!ib_mad_kernel_rmpp_agent(agent) |
564 | && ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) | |
565 | && (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE)) { | |
566 | spin_lock_irq(&file->send_lock); | |
2527e681 | 567 | list_add_tail(&packet->list, &file->send_list); |
1471cb6c IW |
568 | spin_unlock_irq(&file->send_lock); |
569 | } else { | |
570 | spin_lock_irq(&file->send_lock); | |
571 | ret = is_duplicate(file, packet); | |
572 | if (!ret) | |
573 | list_add_tail(&packet->list, &file->send_list); | |
574 | spin_unlock_irq(&file->send_lock); | |
575 | if (ret) { | |
576 | ret = -EINVAL; | |
577 | goto err_msg; | |
578 | } | |
1da177e4 LT |
579 | } |
580 | ||
34816ad9 | 581 | ret = ib_post_send_mad(packet->msg, NULL); |
cb183a06 | 582 | if (ret) |
2527e681 | 583 | goto err_send; |
cb183a06 | 584 | |
2fe7e6f7 | 585 | mutex_unlock(&file->mutex); |
cb0f0910 | 586 | return count; |
cb183a06 | 587 | |
2527e681 SH |
588 | err_send: |
589 | dequeue_send(file, packet); | |
cb183a06 HR |
590 | err_msg: |
591 | ib_free_send_mad(packet->msg); | |
cb183a06 | 592 | err_ah: |
34816ad9 | 593 | ib_destroy_ah(ah); |
1da177e4 | 594 | err_up: |
2fe7e6f7 | 595 | mutex_unlock(&file->mutex); |
1da177e4 LT |
596 | err: |
597 | kfree(packet); | |
598 | return ret; | |
599 | } | |
600 | ||
601 | static unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait) | |
602 | { | |
603 | struct ib_umad_file *file = filp->private_data; | |
604 | ||
605 | /* we will always be able to post a MAD send */ | |
606 | unsigned int mask = POLLOUT | POLLWRNORM; | |
607 | ||
608 | poll_wait(filp, &file->recv_wait, wait); | |
609 | ||
610 | if (!list_empty(&file->recv_list)) | |
611 | mask |= POLLIN | POLLRDNORM; | |
612 | ||
613 | return mask; | |
614 | } | |
615 | ||
a394f83b RD |
616 | static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg, |
617 | int compat_method_mask) | |
1da177e4 LT |
618 | { |
619 | struct ib_user_mad_reg_req ureq; | |
620 | struct ib_mad_reg_req req; | |
2fe7e6f7 | 621 | struct ib_mad_agent *agent = NULL; |
1da177e4 LT |
622 | int agent_id; |
623 | int ret; | |
624 | ||
2fe7e6f7 RD |
625 | mutex_lock(&file->port->file_mutex); |
626 | mutex_lock(&file->mutex); | |
0c99cb6d RD |
627 | |
628 | if (!file->port->ib_dev) { | |
9ad13a42 IW |
629 | dev_notice(file->port->dev, |
630 | "ib_umad_reg_agent: invalid device\n"); | |
0c99cb6d RD |
631 | ret = -EPIPE; |
632 | goto out; | |
633 | } | |
1da177e4 | 634 | |
a394f83b | 635 | if (copy_from_user(&ureq, arg, sizeof ureq)) { |
1da177e4 LT |
636 | ret = -EFAULT; |
637 | goto out; | |
638 | } | |
639 | ||
640 | if (ureq.qpn != 0 && ureq.qpn != 1) { | |
9ad13a42 IW |
641 | dev_notice(file->port->dev, |
642 | "ib_umad_reg_agent: invalid QPN %d specified\n", | |
643 | ureq.qpn); | |
1da177e4 LT |
644 | ret = -EINVAL; |
645 | goto out; | |
646 | } | |
647 | ||
648 | for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) | |
94382f35 | 649 | if (!__get_agent(file, agent_id)) |
1da177e4 LT |
650 | goto found; |
651 | ||
9ad13a42 IW |
652 | dev_notice(file->port->dev, |
653 | "ib_umad_reg_agent: Max Agents (%u) reached\n", | |
654 | IB_UMAD_MAX_AGENTS); | |
1da177e4 LT |
655 | ret = -ENOMEM; |
656 | goto out; | |
657 | ||
658 | found: | |
0df3bb13 | 659 | if (ureq.mgmt_class) { |
0f29b46d | 660 | memset(&req, 0, sizeof(req)); |
0df3bb13 RD |
661 | req.mgmt_class = ureq.mgmt_class; |
662 | req.mgmt_class_version = ureq.mgmt_class_version; | |
a394f83b RD |
663 | memcpy(req.oui, ureq.oui, sizeof req.oui); |
664 | ||
665 | if (compat_method_mask) { | |
666 | u32 *umm = (u32 *) ureq.method_mask; | |
667 | int i; | |
668 | ||
669 | for (i = 0; i < BITS_TO_LONGS(IB_MGMT_MAX_METHODS); ++i) | |
670 | req.method_mask[i] = | |
671 | umm[i * 2] | ((u64) umm[i * 2 + 1] << 32); | |
672 | } else | |
673 | memcpy(req.method_mask, ureq.method_mask, | |
674 | sizeof req.method_mask); | |
0df3bb13 | 675 | } |
1da177e4 LT |
676 | |
677 | agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, | |
678 | ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, | |
0df3bb13 | 679 | ureq.mgmt_class ? &req : NULL, |
cb183a06 | 680 | ureq.rmpp_version, |
0f29b46d | 681 | send_handler, recv_handler, file, 0); |
1da177e4 LT |
682 | if (IS_ERR(agent)) { |
683 | ret = PTR_ERR(agent); | |
2fe7e6f7 | 684 | agent = NULL; |
1da177e4 LT |
685 | goto out; |
686 | } | |
687 | ||
1da177e4 LT |
688 | if (put_user(agent_id, |
689 | (u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) { | |
690 | ret = -EFAULT; | |
ec914c52 | 691 | goto out; |
1da177e4 LT |
692 | } |
693 | ||
2be8e3ee RD |
694 | if (!file->already_used) { |
695 | file->already_used = 1; | |
696 | if (!file->use_pkey_index) { | |
f426a40e IW |
697 | dev_warn(file->port->dev, |
698 | "process %s did not enable P_Key index support.\n", | |
699 | current->comm); | |
700 | dev_warn(file->port->dev, | |
701 | " Documentation/infiniband/user_mad.txt has info on the new ABI.\n"); | |
2be8e3ee RD |
702 | } |
703 | } | |
704 | ||
2f76e829 | 705 | file->agent[agent_id] = agent; |
1da177e4 | 706 | ret = 0; |
2f76e829 | 707 | |
1da177e4 | 708 | out: |
2fe7e6f7 RD |
709 | mutex_unlock(&file->mutex); |
710 | ||
711 | if (ret && agent) | |
712 | ib_unregister_mad_agent(agent); | |
713 | ||
714 | mutex_unlock(&file->port->file_mutex); | |
715 | ||
1da177e4 LT |
716 | return ret; |
717 | } | |
718 | ||
0f29b46d IW |
719 | static int ib_umad_reg_agent2(struct ib_umad_file *file, void __user *arg) |
720 | { | |
721 | struct ib_user_mad_reg_req2 ureq; | |
722 | struct ib_mad_reg_req req; | |
723 | struct ib_mad_agent *agent = NULL; | |
724 | int agent_id; | |
725 | int ret; | |
726 | ||
727 | mutex_lock(&file->port->file_mutex); | |
728 | mutex_lock(&file->mutex); | |
729 | ||
730 | if (!file->port->ib_dev) { | |
731 | dev_notice(file->port->dev, | |
732 | "ib_umad_reg_agent2: invalid device\n"); | |
733 | ret = -EPIPE; | |
734 | goto out; | |
735 | } | |
736 | ||
737 | if (copy_from_user(&ureq, arg, sizeof(ureq))) { | |
738 | ret = -EFAULT; | |
739 | goto out; | |
740 | } | |
741 | ||
742 | if (ureq.qpn != 0 && ureq.qpn != 1) { | |
743 | dev_notice(file->port->dev, | |
744 | "ib_umad_reg_agent2: invalid QPN %d specified\n", | |
745 | ureq.qpn); | |
746 | ret = -EINVAL; | |
747 | goto out; | |
748 | } | |
749 | ||
750 | if (ureq.flags & ~IB_USER_MAD_REG_FLAGS_CAP) { | |
751 | dev_notice(file->port->dev, | |
752 | "ib_umad_reg_agent2 failed: invalid registration flags specified 0x%x; supported 0x%x\n", | |
753 | ureq.flags, IB_USER_MAD_REG_FLAGS_CAP); | |
754 | ret = -EINVAL; | |
755 | ||
756 | if (put_user((u32)IB_USER_MAD_REG_FLAGS_CAP, | |
757 | (u32 __user *) (arg + offsetof(struct | |
758 | ib_user_mad_reg_req2, flags)))) | |
759 | ret = -EFAULT; | |
760 | ||
761 | goto out; | |
762 | } | |
763 | ||
764 | for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) | |
765 | if (!__get_agent(file, agent_id)) | |
766 | goto found; | |
767 | ||
768 | dev_notice(file->port->dev, | |
769 | "ib_umad_reg_agent2: Max Agents (%u) reached\n", | |
770 | IB_UMAD_MAX_AGENTS); | |
771 | ret = -ENOMEM; | |
772 | goto out; | |
773 | ||
774 | found: | |
775 | if (ureq.mgmt_class) { | |
776 | memset(&req, 0, sizeof(req)); | |
777 | req.mgmt_class = ureq.mgmt_class; | |
778 | req.mgmt_class_version = ureq.mgmt_class_version; | |
779 | if (ureq.oui & 0xff000000) { | |
780 | dev_notice(file->port->dev, | |
781 | "ib_umad_reg_agent2 failed: oui invalid 0x%08x\n", | |
782 | ureq.oui); | |
783 | ret = -EINVAL; | |
784 | goto out; | |
785 | } | |
786 | req.oui[2] = ureq.oui & 0x0000ff; | |
787 | req.oui[1] = (ureq.oui & 0x00ff00) >> 8; | |
788 | req.oui[0] = (ureq.oui & 0xff0000) >> 16; | |
789 | memcpy(req.method_mask, ureq.method_mask, | |
790 | sizeof(req.method_mask)); | |
791 | } | |
792 | ||
793 | agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, | |
794 | ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, | |
795 | ureq.mgmt_class ? &req : NULL, | |
796 | ureq.rmpp_version, | |
797 | send_handler, recv_handler, file, | |
798 | ureq.flags); | |
799 | if (IS_ERR(agent)) { | |
800 | ret = PTR_ERR(agent); | |
801 | agent = NULL; | |
802 | goto out; | |
803 | } | |
804 | ||
805 | if (put_user(agent_id, | |
806 | (u32 __user *)(arg + | |
807 | offsetof(struct ib_user_mad_reg_req2, id)))) { | |
808 | ret = -EFAULT; | |
809 | goto out; | |
810 | } | |
811 | ||
812 | if (!file->already_used) { | |
813 | file->already_used = 1; | |
814 | file->use_pkey_index = 1; | |
815 | } | |
816 | ||
817 | file->agent[agent_id] = agent; | |
818 | ret = 0; | |
819 | ||
820 | out: | |
821 | mutex_unlock(&file->mutex); | |
822 | ||
823 | if (ret && agent) | |
824 | ib_unregister_mad_agent(agent); | |
825 | ||
826 | mutex_unlock(&file->port->file_mutex); | |
827 | ||
828 | return ret; | |
829 | } | |
830 | ||
831 | ||
a394f83b | 832 | static int ib_umad_unreg_agent(struct ib_umad_file *file, u32 __user *arg) |
1da177e4 | 833 | { |
2f76e829 | 834 | struct ib_mad_agent *agent = NULL; |
1da177e4 LT |
835 | u32 id; |
836 | int ret = 0; | |
837 | ||
a394f83b | 838 | if (get_user(id, arg)) |
2f76e829 | 839 | return -EFAULT; |
1da177e4 | 840 | |
2fe7e6f7 RD |
841 | mutex_lock(&file->port->file_mutex); |
842 | mutex_lock(&file->mutex); | |
1da177e4 | 843 | |
caf6e3f2 | 844 | if (id >= IB_UMAD_MAX_AGENTS || !__get_agent(file, id)) { |
1da177e4 LT |
845 | ret = -EINVAL; |
846 | goto out; | |
847 | } | |
848 | ||
2f76e829 | 849 | agent = file->agent[id]; |
1da177e4 LT |
850 | file->agent[id] = NULL; |
851 | ||
852 | out: | |
2fe7e6f7 | 853 | mutex_unlock(&file->mutex); |
2f76e829 | 854 | |
ec914c52 | 855 | if (agent) |
2f76e829 | 856 | ib_unregister_mad_agent(agent); |
2f76e829 | 857 | |
2fe7e6f7 RD |
858 | mutex_unlock(&file->port->file_mutex); |
859 | ||
1da177e4 LT |
860 | return ret; |
861 | } | |
862 | ||
2be8e3ee RD |
863 | static long ib_umad_enable_pkey(struct ib_umad_file *file) |
864 | { | |
865 | int ret = 0; | |
866 | ||
2fe7e6f7 | 867 | mutex_lock(&file->mutex); |
2be8e3ee RD |
868 | if (file->already_used) |
869 | ret = -EINVAL; | |
870 | else | |
871 | file->use_pkey_index = 1; | |
2fe7e6f7 | 872 | mutex_unlock(&file->mutex); |
2be8e3ee RD |
873 | |
874 | return ret; | |
875 | } | |
876 | ||
cb183a06 HR |
877 | static long ib_umad_ioctl(struct file *filp, unsigned int cmd, |
878 | unsigned long arg) | |
1da177e4 LT |
879 | { |
880 | switch (cmd) { | |
881 | case IB_USER_MAD_REGISTER_AGENT: | |
a394f83b | 882 | return ib_umad_reg_agent(filp->private_data, (void __user *) arg, 0); |
1da177e4 | 883 | case IB_USER_MAD_UNREGISTER_AGENT: |
a394f83b | 884 | return ib_umad_unreg_agent(filp->private_data, (__u32 __user *) arg); |
2be8e3ee RD |
885 | case IB_USER_MAD_ENABLE_PKEY: |
886 | return ib_umad_enable_pkey(filp->private_data); | |
0f29b46d IW |
887 | case IB_USER_MAD_REGISTER_AGENT2: |
888 | return ib_umad_reg_agent2(filp->private_data, (void __user *) arg); | |
1da177e4 LT |
889 | default: |
890 | return -ENOIOCTLCMD; | |
891 | } | |
892 | } | |
893 | ||
a394f83b RD |
894 | #ifdef CONFIG_COMPAT |
895 | static long ib_umad_compat_ioctl(struct file *filp, unsigned int cmd, | |
896 | unsigned long arg) | |
897 | { | |
898 | switch (cmd) { | |
899 | case IB_USER_MAD_REGISTER_AGENT: | |
900 | return ib_umad_reg_agent(filp->private_data, compat_ptr(arg), 1); | |
901 | case IB_USER_MAD_UNREGISTER_AGENT: | |
902 | return ib_umad_unreg_agent(filp->private_data, compat_ptr(arg)); | |
903 | case IB_USER_MAD_ENABLE_PKEY: | |
904 | return ib_umad_enable_pkey(filp->private_data); | |
0f29b46d IW |
905 | case IB_USER_MAD_REGISTER_AGENT2: |
906 | return ib_umad_reg_agent2(filp->private_data, compat_ptr(arg)); | |
a394f83b RD |
907 | default: |
908 | return -ENOIOCTLCMD; | |
909 | } | |
910 | } | |
911 | #endif | |
912 | ||
feae1ef1 RD |
913 | /* |
914 | * ib_umad_open() does not need the BKL: | |
915 | * | |
6aa2a86e | 916 | * - the ib_umad_port structures are properly reference counted, and |
feae1ef1 RD |
917 | * everything else is purely local to the file being created, so |
918 | * races against other open calls are not a problem; | |
919 | * - the ioctl method does not affect any global state outside of the | |
920 | * file structure being operated on; | |
feae1ef1 | 921 | */ |
1da177e4 LT |
922 | static int ib_umad_open(struct inode *inode, struct file *filp) |
923 | { | |
a74968f8 | 924 | struct ib_umad_port *port; |
1da177e4 | 925 | struct ib_umad_file *file; |
8ec0a0e6 | 926 | int ret = -ENXIO; |
1da177e4 | 927 | |
6aa2a86e | 928 | port = container_of(inode->i_cdev, struct ib_umad_port, cdev); |
a74968f8 | 929 | |
2fe7e6f7 | 930 | mutex_lock(&port->file_mutex); |
0c99cb6d | 931 | |
8ec0a0e6 | 932 | if (!port->ib_dev) |
0c99cb6d | 933 | goto out; |
0c99cb6d | 934 | |
8ec0a0e6 | 935 | ret = -ENOMEM; |
cb0f0910 | 936 | file = kzalloc(sizeof *file, GFP_KERNEL); |
8ec0a0e6 | 937 | if (!file) |
0c99cb6d | 938 | goto out; |
1da177e4 | 939 | |
2fe7e6f7 | 940 | mutex_init(&file->mutex); |
2527e681 | 941 | spin_lock_init(&file->send_lock); |
1da177e4 | 942 | INIT_LIST_HEAD(&file->recv_list); |
2527e681 | 943 | INIT_LIST_HEAD(&file->send_list); |
1da177e4 LT |
944 | init_waitqueue_head(&file->recv_wait); |
945 | ||
946 | file->port = port; | |
947 | filp->private_data = file; | |
948 | ||
0c99cb6d RD |
949 | list_add_tail(&file->port_list, &port->file_list); |
950 | ||
bc1db9af | 951 | ret = nonseekable_open(inode, filp); |
8ec0a0e6 BVA |
952 | if (ret) { |
953 | list_del(&file->port_list); | |
954 | kfree(file); | |
955 | goto out; | |
956 | } | |
957 | ||
60e1751c | 958 | kobject_get(&port->umad_dev->kobj); |
bc1db9af | 959 | |
0c99cb6d | 960 | out: |
2fe7e6f7 | 961 | mutex_unlock(&port->file_mutex); |
0c99cb6d | 962 | return ret; |
1da177e4 LT |
963 | } |
964 | ||
965 | static int ib_umad_close(struct inode *inode, struct file *filp) | |
966 | { | |
967 | struct ib_umad_file *file = filp->private_data; | |
a74968f8 | 968 | struct ib_umad_device *dev = file->port->umad_dev; |
561e148e | 969 | struct ib_umad_packet *packet, *tmp; |
94382f35 | 970 | int already_dead; |
1da177e4 LT |
971 | int i; |
972 | ||
2fe7e6f7 RD |
973 | mutex_lock(&file->port->file_mutex); |
974 | mutex_lock(&file->mutex); | |
94382f35 RD |
975 | |
976 | already_dead = file->agents_dead; | |
977 | file->agents_dead = 1; | |
1da177e4 | 978 | |
f36e1793 JM |
979 | list_for_each_entry_safe(packet, tmp, &file->recv_list, list) { |
980 | if (packet->recv_wc) | |
981 | ib_free_recv_mad(packet->recv_wc); | |
561e148e | 982 | kfree(packet); |
f36e1793 | 983 | } |
561e148e | 984 | |
0c99cb6d | 985 | list_del(&file->port_list); |
0c99cb6d | 986 | |
2fe7e6f7 | 987 | mutex_unlock(&file->mutex); |
94382f35 RD |
988 | |
989 | if (!already_dead) | |
990 | for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i) | |
991 | if (file->agent[i]) | |
992 | ib_unregister_mad_agent(file->agent[i]); | |
1da177e4 | 993 | |
2fe7e6f7 | 994 | mutex_unlock(&file->port->file_mutex); |
94382f35 RD |
995 | |
996 | kfree(file); | |
60e1751c | 997 | kobject_put(&dev->kobj); |
a74968f8 | 998 | |
1da177e4 LT |
999 | return 0; |
1000 | } | |
1001 | ||
2b8693c0 | 1002 | static const struct file_operations umad_fops = { |
d3f2c67f AC |
1003 | .owner = THIS_MODULE, |
1004 | .read = ib_umad_read, | |
1005 | .write = ib_umad_write, | |
1006 | .poll = ib_umad_poll, | |
1da177e4 | 1007 | .unlocked_ioctl = ib_umad_ioctl, |
a394f83b | 1008 | #ifdef CONFIG_COMPAT |
d3f2c67f | 1009 | .compat_ioctl = ib_umad_compat_ioctl, |
a394f83b | 1010 | #endif |
d3f2c67f | 1011 | .open = ib_umad_open, |
bc1db9af RD |
1012 | .release = ib_umad_close, |
1013 | .llseek = no_llseek, | |
1da177e4 LT |
1014 | }; |
1015 | ||
1016 | static int ib_umad_sm_open(struct inode *inode, struct file *filp) | |
1017 | { | |
a74968f8 | 1018 | struct ib_umad_port *port; |
1da177e4 LT |
1019 | struct ib_port_modify props = { |
1020 | .set_port_cap_mask = IB_PORT_SM | |
1021 | }; | |
1022 | int ret; | |
1023 | ||
6aa2a86e | 1024 | port = container_of(inode->i_cdev, struct ib_umad_port, sm_cdev); |
a74968f8 | 1025 | |
1da177e4 | 1026 | if (filp->f_flags & O_NONBLOCK) { |
a74968f8 RD |
1027 | if (down_trylock(&port->sm_sem)) { |
1028 | ret = -EAGAIN; | |
1029 | goto fail; | |
1030 | } | |
1da177e4 | 1031 | } else { |
a74968f8 RD |
1032 | if (down_interruptible(&port->sm_sem)) { |
1033 | ret = -ERESTARTSYS; | |
1034 | goto fail; | |
1035 | } | |
1da177e4 LT |
1036 | } |
1037 | ||
1038 | ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); | |
8ec0a0e6 BVA |
1039 | if (ret) |
1040 | goto err_up_sem; | |
1da177e4 LT |
1041 | |
1042 | filp->private_data = port; | |
1043 | ||
8ec0a0e6 BVA |
1044 | ret = nonseekable_open(inode, filp); |
1045 | if (ret) | |
1046 | goto err_clr_sm_cap; | |
1047 | ||
60e1751c | 1048 | kobject_get(&port->umad_dev->kobj); |
8ec0a0e6 BVA |
1049 | |
1050 | return 0; | |
1051 | ||
1052 | err_clr_sm_cap: | |
1053 | swap(props.set_port_cap_mask, props.clr_port_cap_mask); | |
1054 | ib_modify_port(port->ib_dev, port->port_num, 0, &props); | |
1055 | ||
1056 | err_up_sem: | |
1057 | up(&port->sm_sem); | |
a74968f8 RD |
1058 | |
1059 | fail: | |
a74968f8 | 1060 | return ret; |
1da177e4 LT |
1061 | } |
1062 | ||
1063 | static int ib_umad_sm_close(struct inode *inode, struct file *filp) | |
1064 | { | |
1065 | struct ib_umad_port *port = filp->private_data; | |
1066 | struct ib_port_modify props = { | |
1067 | .clr_port_cap_mask = IB_PORT_SM | |
1068 | }; | |
0c99cb6d RD |
1069 | int ret = 0; |
1070 | ||
2fe7e6f7 | 1071 | mutex_lock(&port->file_mutex); |
0c99cb6d RD |
1072 | if (port->ib_dev) |
1073 | ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); | |
2fe7e6f7 | 1074 | mutex_unlock(&port->file_mutex); |
1da177e4 | 1075 | |
1da177e4 LT |
1076 | up(&port->sm_sem); |
1077 | ||
60e1751c | 1078 | kobject_put(&port->umad_dev->kobj); |
a74968f8 | 1079 | |
1da177e4 LT |
1080 | return ret; |
1081 | } | |
1082 | ||
2b8693c0 | 1083 | static const struct file_operations umad_sm_fops = { |
d3f2c67f AC |
1084 | .owner = THIS_MODULE, |
1085 | .open = ib_umad_sm_open, | |
bc1db9af RD |
1086 | .release = ib_umad_sm_close, |
1087 | .llseek = no_llseek, | |
1da177e4 LT |
1088 | }; |
1089 | ||
1090 | static struct ib_client umad_client = { | |
1091 | .name = "umad", | |
1092 | .add = ib_umad_add_one, | |
1093 | .remove = ib_umad_remove_one | |
1094 | }; | |
1095 | ||
f4e91eb4 TJ |
1096 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
1097 | char *buf) | |
1da177e4 | 1098 | { |
f4e91eb4 | 1099 | struct ib_umad_port *port = dev_get_drvdata(dev); |
1da177e4 | 1100 | |
a74968f8 RD |
1101 | if (!port) |
1102 | return -ENODEV; | |
1103 | ||
1da177e4 LT |
1104 | return sprintf(buf, "%s\n", port->ib_dev->name); |
1105 | } | |
f4e91eb4 | 1106 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
1da177e4 | 1107 | |
f4e91eb4 TJ |
1108 | static ssize_t show_port(struct device *dev, struct device_attribute *attr, |
1109 | char *buf) | |
1da177e4 | 1110 | { |
f4e91eb4 | 1111 | struct ib_umad_port *port = dev_get_drvdata(dev); |
1da177e4 | 1112 | |
a74968f8 RD |
1113 | if (!port) |
1114 | return -ENODEV; | |
1115 | ||
1da177e4 LT |
1116 | return sprintf(buf, "%d\n", port->port_num); |
1117 | } | |
f4e91eb4 | 1118 | static DEVICE_ATTR(port, S_IRUGO, show_port, NULL); |
1da177e4 | 1119 | |
0933e2d9 AK |
1120 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
1121 | __stringify(IB_USER_MAD_ABI_VERSION)); | |
1da177e4 | 1122 | |
8698d3fe AC |
1123 | static dev_t overflow_maj; |
1124 | static DECLARE_BITMAP(overflow_map, IB_UMAD_MAX_PORTS); | |
f426a40e | 1125 | static int find_overflow_devnum(struct ib_device *device) |
8698d3fe AC |
1126 | { |
1127 | int ret; | |
1128 | ||
1129 | if (!overflow_maj) { | |
1130 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UMAD_MAX_PORTS * 2, | |
1131 | "infiniband_mad"); | |
1132 | if (ret) { | |
f426a40e IW |
1133 | dev_err(&device->dev, |
1134 | "couldn't register dynamic device number\n"); | |
8698d3fe AC |
1135 | return ret; |
1136 | } | |
1137 | } | |
1138 | ||
1139 | ret = find_first_zero_bit(overflow_map, IB_UMAD_MAX_PORTS); | |
1140 | if (ret >= IB_UMAD_MAX_PORTS) | |
1141 | return -1; | |
1142 | ||
1143 | return ret; | |
1144 | } | |
1145 | ||
1da177e4 | 1146 | static int ib_umad_init_port(struct ib_device *device, int port_num, |
60e1751c | 1147 | struct ib_umad_device *umad_dev, |
1da177e4 LT |
1148 | struct ib_umad_port *port) |
1149 | { | |
d451b8df | 1150 | int devnum; |
dc2ed5e3 | 1151 | dev_t base; |
d451b8df | 1152 | |
a74968f8 | 1153 | spin_lock(&port_lock); |
d451b8df AC |
1154 | devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS); |
1155 | if (devnum >= IB_UMAD_MAX_PORTS) { | |
a74968f8 | 1156 | spin_unlock(&port_lock); |
f426a40e | 1157 | devnum = find_overflow_devnum(device); |
8698d3fe AC |
1158 | if (devnum < 0) |
1159 | return -1; | |
1160 | ||
1161 | spin_lock(&port_lock); | |
1162 | port->dev_num = devnum + IB_UMAD_MAX_PORTS; | |
1163 | base = devnum + overflow_maj; | |
1164 | set_bit(devnum, overflow_map); | |
1165 | } else { | |
1166 | port->dev_num = devnum; | |
1167 | base = devnum + base_dev; | |
1168 | set_bit(devnum, dev_map); | |
1da177e4 | 1169 | } |
a74968f8 | 1170 | spin_unlock(&port_lock); |
1da177e4 LT |
1171 | |
1172 | port->ib_dev = device; | |
1173 | port->port_num = port_num; | |
557d0540 | 1174 | sema_init(&port->sm_sem, 1); |
2fe7e6f7 | 1175 | mutex_init(&port->file_mutex); |
0c99cb6d | 1176 | INIT_LIST_HEAD(&port->file_list); |
1da177e4 | 1177 | |
2b937afc AC |
1178 | cdev_init(&port->cdev, &umad_fops); |
1179 | port->cdev.owner = THIS_MODULE; | |
60e1751c | 1180 | port->cdev.kobj.parent = &umad_dev->kobj; |
2b937afc | 1181 | kobject_set_name(&port->cdev.kobj, "umad%d", port->dev_num); |
dc2ed5e3 | 1182 | if (cdev_add(&port->cdev, base, 1)) |
1da177e4 LT |
1183 | goto err_cdev; |
1184 | ||
91bd418f | 1185 | port->dev = device_create(umad_class, device->dma_device, |
2b937afc | 1186 | port->cdev.dev, port, |
91bd418f | 1187 | "umad%d", port->dev_num); |
f4e91eb4 | 1188 | if (IS_ERR(port->dev)) |
a74968f8 | 1189 | goto err_cdev; |
1da177e4 | 1190 | |
f4e91eb4 TJ |
1191 | if (device_create_file(port->dev, &dev_attr_ibdev)) |
1192 | goto err_dev; | |
1193 | if (device_create_file(port->dev, &dev_attr_port)) | |
1194 | goto err_dev; | |
1195 | ||
dc2ed5e3 | 1196 | base += IB_UMAD_MAX_PORTS; |
2b937afc AC |
1197 | cdev_init(&port->sm_cdev, &umad_sm_fops); |
1198 | port->sm_cdev.owner = THIS_MODULE; | |
60e1751c | 1199 | port->sm_cdev.kobj.parent = &umad_dev->kobj; |
2b937afc | 1200 | kobject_set_name(&port->sm_cdev.kobj, "issm%d", port->dev_num); |
dc2ed5e3 | 1201 | if (cdev_add(&port->sm_cdev, base, 1)) |
a74968f8 | 1202 | goto err_sm_cdev; |
1da177e4 | 1203 | |
91bd418f | 1204 | port->sm_dev = device_create(umad_class, device->dma_device, |
2b937afc | 1205 | port->sm_cdev.dev, port, |
91bd418f | 1206 | "issm%d", port->dev_num); |
f4e91eb4 | 1207 | if (IS_ERR(port->sm_dev)) |
1da177e4 LT |
1208 | goto err_sm_cdev; |
1209 | ||
f4e91eb4 TJ |
1210 | if (device_create_file(port->sm_dev, &dev_attr_ibdev)) |
1211 | goto err_sm_dev; | |
1212 | if (device_create_file(port->sm_dev, &dev_attr_port)) | |
1213 | goto err_sm_dev; | |
1da177e4 LT |
1214 | |
1215 | return 0; | |
1216 | ||
f4e91eb4 | 1217 | err_sm_dev: |
2b937afc | 1218 | device_destroy(umad_class, port->sm_cdev.dev); |
1da177e4 LT |
1219 | |
1220 | err_sm_cdev: | |
2b937afc | 1221 | cdev_del(&port->sm_cdev); |
1da177e4 | 1222 | |
f4e91eb4 | 1223 | err_dev: |
2b937afc | 1224 | device_destroy(umad_class, port->cdev.dev); |
1da177e4 LT |
1225 | |
1226 | err_cdev: | |
2b937afc | 1227 | cdev_del(&port->cdev); |
8698d3fe AC |
1228 | if (port->dev_num < IB_UMAD_MAX_PORTS) |
1229 | clear_bit(devnum, dev_map); | |
1230 | else | |
1231 | clear_bit(devnum, overflow_map); | |
1da177e4 LT |
1232 | |
1233 | return -1; | |
1234 | } | |
1235 | ||
a74968f8 RD |
1236 | static void ib_umad_kill_port(struct ib_umad_port *port) |
1237 | { | |
0c99cb6d RD |
1238 | struct ib_umad_file *file; |
1239 | int id; | |
1240 | ||
f4e91eb4 TJ |
1241 | dev_set_drvdata(port->dev, NULL); |
1242 | dev_set_drvdata(port->sm_dev, NULL); | |
a74968f8 | 1243 | |
2b937afc AC |
1244 | device_destroy(umad_class, port->cdev.dev); |
1245 | device_destroy(umad_class, port->sm_cdev.dev); | |
a74968f8 | 1246 | |
2b937afc AC |
1247 | cdev_del(&port->cdev); |
1248 | cdev_del(&port->sm_cdev); | |
a74968f8 | 1249 | |
2fe7e6f7 | 1250 | mutex_lock(&port->file_mutex); |
0c99cb6d RD |
1251 | |
1252 | port->ib_dev = NULL; | |
1253 | ||
2fe7e6f7 RD |
1254 | list_for_each_entry(file, &port->file_list, port_list) { |
1255 | mutex_lock(&file->mutex); | |
94382f35 | 1256 | file->agents_dead = 1; |
2fe7e6f7 | 1257 | mutex_unlock(&file->mutex); |
94382f35 RD |
1258 | |
1259 | for (id = 0; id < IB_UMAD_MAX_AGENTS; ++id) | |
1260 | if (file->agent[id]) | |
1261 | ib_unregister_mad_agent(file->agent[id]); | |
94382f35 | 1262 | } |
0c99cb6d | 1263 | |
2fe7e6f7 | 1264 | mutex_unlock(&port->file_mutex); |
0c99cb6d | 1265 | |
8698d3fe AC |
1266 | if (port->dev_num < IB_UMAD_MAX_PORTS) |
1267 | clear_bit(port->dev_num, dev_map); | |
1268 | else | |
1269 | clear_bit(port->dev_num - IB_UMAD_MAX_PORTS, overflow_map); | |
a74968f8 RD |
1270 | } |
1271 | ||
1da177e4 LT |
1272 | static void ib_umad_add_one(struct ib_device *device) |
1273 | { | |
1274 | struct ib_umad_device *umad_dev; | |
1275 | int s, e, i; | |
1276 | ||
07ebafba TT |
1277 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1278 | return; | |
1279 | ||
1280 | if (device->node_type == RDMA_NODE_IB_SWITCH) | |
1da177e4 LT |
1281 | s = e = 0; |
1282 | else { | |
1283 | s = 1; | |
1284 | e = device->phys_port_cnt; | |
1285 | } | |
1286 | ||
cb0f0910 | 1287 | umad_dev = kzalloc(sizeof *umad_dev + |
1da177e4 LT |
1288 | (e - s + 1) * sizeof (struct ib_umad_port), |
1289 | GFP_KERNEL); | |
1290 | if (!umad_dev) | |
1291 | return; | |
1292 | ||
60e1751c | 1293 | kobject_init(&umad_dev->kobj, &ib_umad_dev_ktype); |
1da177e4 LT |
1294 | |
1295 | umad_dev->start_port = s; | |
1296 | umad_dev->end_port = e; | |
1297 | ||
1298 | for (i = s; i <= e; ++i) { | |
1299 | umad_dev->port[i - s].umad_dev = umad_dev; | |
1300 | ||
60e1751c BVA |
1301 | if (ib_umad_init_port(device, i, umad_dev, |
1302 | &umad_dev->port[i - s])) | |
1da177e4 LT |
1303 | goto err; |
1304 | } | |
1305 | ||
1306 | ib_set_client_data(device, &umad_client, umad_dev); | |
1307 | ||
1308 | return; | |
1309 | ||
1310 | err: | |
a74968f8 | 1311 | while (--i >= s) |
8b37b947 | 1312 | ib_umad_kill_port(&umad_dev->port[i - s]); |
1da177e4 | 1313 | |
60e1751c | 1314 | kobject_put(&umad_dev->kobj); |
1da177e4 LT |
1315 | } |
1316 | ||
1317 | static void ib_umad_remove_one(struct ib_device *device) | |
1318 | { | |
1319 | struct ib_umad_device *umad_dev = ib_get_client_data(device, &umad_client); | |
1320 | int i; | |
1321 | ||
1322 | if (!umad_dev) | |
1323 | return; | |
1324 | ||
a74968f8 RD |
1325 | for (i = 0; i <= umad_dev->end_port - umad_dev->start_port; ++i) |
1326 | ib_umad_kill_port(&umad_dev->port[i]); | |
1da177e4 | 1327 | |
60e1751c | 1328 | kobject_put(&umad_dev->kobj); |
1da177e4 LT |
1329 | } |
1330 | ||
2c9ede55 | 1331 | static char *umad_devnode(struct device *dev, umode_t *mode) |
c3af0980 RD |
1332 | { |
1333 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); | |
1334 | } | |
1335 | ||
1da177e4 LT |
1336 | static int __init ib_umad_init(void) |
1337 | { | |
1338 | int ret; | |
1339 | ||
1da177e4 LT |
1340 | ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2, |
1341 | "infiniband_mad"); | |
1342 | if (ret) { | |
f426a40e | 1343 | pr_err("couldn't register device number\n"); |
1da177e4 LT |
1344 | goto out; |
1345 | } | |
1346 | ||
a74968f8 RD |
1347 | umad_class = class_create(THIS_MODULE, "infiniband_mad"); |
1348 | if (IS_ERR(umad_class)) { | |
1349 | ret = PTR_ERR(umad_class); | |
f426a40e | 1350 | pr_err("couldn't create class infiniband_mad\n"); |
1da177e4 LT |
1351 | goto out_chrdev; |
1352 | } | |
1353 | ||
c3af0980 RD |
1354 | umad_class->devnode = umad_devnode; |
1355 | ||
0933e2d9 | 1356 | ret = class_create_file(umad_class, &class_attr_abi_version.attr); |
1da177e4 | 1357 | if (ret) { |
f426a40e | 1358 | pr_err("couldn't create abi_version attribute\n"); |
1da177e4 LT |
1359 | goto out_class; |
1360 | } | |
1361 | ||
1362 | ret = ib_register_client(&umad_client); | |
1363 | if (ret) { | |
f426a40e | 1364 | pr_err("couldn't register ib_umad client\n"); |
1da177e4 LT |
1365 | goto out_class; |
1366 | } | |
1367 | ||
1368 | return 0; | |
1369 | ||
1370 | out_class: | |
a74968f8 | 1371 | class_destroy(umad_class); |
1da177e4 LT |
1372 | |
1373 | out_chrdev: | |
1374 | unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); | |
1375 | ||
1376 | out: | |
1377 | return ret; | |
1378 | } | |
1379 | ||
1380 | static void __exit ib_umad_cleanup(void) | |
1381 | { | |
1382 | ib_unregister_client(&umad_client); | |
a74968f8 | 1383 | class_destroy(umad_class); |
1da177e4 | 1384 | unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); |
8698d3fe AC |
1385 | if (overflow_maj) |
1386 | unregister_chrdev_region(overflow_maj, IB_UMAD_MAX_PORTS * 2); | |
1da177e4 LT |
1387 | } |
1388 | ||
1389 | module_init(ib_umad_init); | |
1390 | module_exit(ib_umad_cleanup); |