Commit | Line | Data |
---|---|---|
466f8004 AE |
1 | /* |
2 | Copyright (c) 2010,2011 Code Aurora Forum. All rights reserved. | |
3 | Copyright (c) 2011,2012 Intel Corp. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License version 2 and | |
7 | only version 2 as published by the Free Software Foundation. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | */ | |
14 | ||
15 | #include <net/bluetooth/bluetooth.h> | |
16 | #include <net/bluetooth/hci_core.h> | |
17 | #include <net/bluetooth/l2cap.h> | |
7ef9fbf0 | 18 | |
7024728e | 19 | #include "a2mp.h" |
7ef9fbf0 | 20 | #include "amp.h" |
466f8004 | 21 | |
f97268fc AE |
22 | /* Global AMP Manager list */ |
23 | LIST_HEAD(amp_mgr_list); | |
24 | DEFINE_MUTEX(amp_mgr_list_lock); | |
25 | ||
f6d3c6e7 AE |
26 | /* A2MP build & send command helper functions */ |
27 | static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data) | |
28 | { | |
29 | struct a2mp_cmd *cmd; | |
30 | int plen; | |
31 | ||
32 | plen = sizeof(*cmd) + len; | |
33 | cmd = kzalloc(plen, GFP_KERNEL); | |
34 | if (!cmd) | |
35 | return NULL; | |
36 | ||
37 | cmd->code = code; | |
38 | cmd->ident = ident; | |
39 | cmd->len = cpu_to_le16(len); | |
40 | ||
41 | memcpy(cmd->data, data, len); | |
42 | ||
43 | return cmd; | |
44 | } | |
45 | ||
8e2a0d92 | 46 | void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data) |
f6d3c6e7 AE |
47 | { |
48 | struct l2cap_chan *chan = mgr->a2mp_chan; | |
49 | struct a2mp_cmd *cmd; | |
50 | u16 total_len = len + sizeof(*cmd); | |
51 | struct kvec iv; | |
52 | struct msghdr msg; | |
53 | ||
54 | cmd = __a2mp_build(code, ident, len, data); | |
55 | if (!cmd) | |
56 | return; | |
57 | ||
58 | iv.iov_base = cmd; | |
59 | iv.iov_len = total_len; | |
60 | ||
61 | memset(&msg, 0, sizeof(msg)); | |
62 | ||
17836394 | 63 | iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, &iv, 1, total_len); |
f6d3c6e7 | 64 | |
8d46321c | 65 | l2cap_chan_send(chan, &msg, total_len); |
f6d3c6e7 AE |
66 | |
67 | kfree(cmd); | |
68 | } | |
69 | ||
9495b2ee | 70 | u8 __next_ident(struct amp_mgr *mgr) |
aa09537d AE |
71 | { |
72 | if (++mgr->ident == 0) | |
73 | mgr->ident = 1; | |
74 | ||
75 | return mgr->ident; | |
76 | } | |
77 | ||
8598d064 | 78 | /* hci_dev_list shall be locked */ |
23f0cb41 | 79 | static void __a2mp_add_cl(struct amp_mgr *mgr, struct a2mp_cl *cl) |
8598d064 | 80 | { |
8598d064 | 81 | struct hci_dev *hdev; |
e8803534 | 82 | int i = 1; |
8598d064 | 83 | |
346e7099 MH |
84 | cl[0].id = AMP_ID_BREDR; |
85 | cl[0].type = AMP_TYPE_BREDR; | |
86 | cl[0].status = AMP_STATUS_BLUETOOTH_ONLY; | |
8598d064 AE |
87 | |
88 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
e8803534 MH |
89 | if (hdev->dev_type == HCI_AMP) { |
90 | cl[i].id = hdev->id; | |
91 | cl[i].type = hdev->amp_type; | |
cd0a85c2 MH |
92 | if (test_bit(HCI_UP, &hdev->flags)) |
93 | cl[i].status = hdev->amp_status; | |
94 | else | |
95 | cl[i].status = AMP_STATUS_POWERED_DOWN; | |
e8803534 MH |
96 | i++; |
97 | } | |
8598d064 AE |
98 | } |
99 | } | |
100 | ||
21dbd2ce AE |
101 | /* Processing A2MP messages */ |
102 | static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb, | |
103 | struct a2mp_cmd *hdr) | |
104 | { | |
105 | struct a2mp_cmd_rej *rej = (void *) skb->data; | |
106 | ||
107 | if (le16_to_cpu(hdr->len) < sizeof(*rej)) | |
108 | return -EINVAL; | |
109 | ||
110 | BT_DBG("ident %d reason %d", hdr->ident, le16_to_cpu(rej->reason)); | |
111 | ||
112 | skb_pull(skb, sizeof(*rej)); | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
8598d064 AE |
117 | static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb, |
118 | struct a2mp_cmd *hdr) | |
119 | { | |
120 | struct a2mp_discov_req *req = (void *) skb->data; | |
121 | u16 len = le16_to_cpu(hdr->len); | |
122 | struct a2mp_discov_rsp *rsp; | |
123 | u16 ext_feat; | |
124 | u8 num_ctrl; | |
f822c411 | 125 | struct hci_dev *hdev; |
8598d064 AE |
126 | |
127 | if (len < sizeof(*req)) | |
128 | return -EINVAL; | |
129 | ||
130 | skb_pull(skb, sizeof(*req)); | |
131 | ||
132 | ext_feat = le16_to_cpu(req->ext_feat); | |
133 | ||
134 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat); | |
135 | ||
136 | /* check that packet is not broken for now */ | |
137 | while (ext_feat & A2MP_FEAT_EXT) { | |
138 | if (len < sizeof(ext_feat)) | |
139 | return -EINVAL; | |
140 | ||
141 | ext_feat = get_unaligned_le16(skb->data); | |
142 | BT_DBG("efm 0x%4.4x", ext_feat); | |
143 | len -= sizeof(ext_feat); | |
144 | skb_pull(skb, sizeof(ext_feat)); | |
145 | } | |
146 | ||
147 | read_lock(&hci_dev_list_lock); | |
148 | ||
f822c411 MH |
149 | /* at minimum the BR/EDR needs to be listed */ |
150 | num_ctrl = 1; | |
151 | ||
152 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
153 | if (hdev->dev_type == HCI_AMP) | |
154 | num_ctrl++; | |
155 | } | |
156 | ||
8598d064 AE |
157 | len = num_ctrl * sizeof(struct a2mp_cl) + sizeof(*rsp); |
158 | rsp = kmalloc(len, GFP_ATOMIC); | |
159 | if (!rsp) { | |
160 | read_unlock(&hci_dev_list_lock); | |
161 | return -ENOMEM; | |
162 | } | |
163 | ||
dcf4adbf | 164 | rsp->mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); |
8598d064 AE |
165 | rsp->ext_feat = 0; |
166 | ||
23f0cb41 | 167 | __a2mp_add_cl(mgr, rsp->cl); |
8598d064 AE |
168 | |
169 | read_unlock(&hci_dev_list_lock); | |
170 | ||
171 | a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp); | |
172 | ||
173 | kfree(rsp); | |
174 | return 0; | |
175 | } | |
176 | ||
aa09537d AE |
177 | static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
178 | struct a2mp_cmd *hdr) | |
179 | { | |
180 | struct a2mp_discov_rsp *rsp = (void *) skb->data; | |
181 | u16 len = le16_to_cpu(hdr->len); | |
182 | struct a2mp_cl *cl; | |
183 | u16 ext_feat; | |
2766be48 | 184 | bool found = false; |
aa09537d AE |
185 | |
186 | if (len < sizeof(*rsp)) | |
187 | return -EINVAL; | |
188 | ||
189 | len -= sizeof(*rsp); | |
190 | skb_pull(skb, sizeof(*rsp)); | |
191 | ||
192 | ext_feat = le16_to_cpu(rsp->ext_feat); | |
193 | ||
194 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat); | |
195 | ||
196 | /* check that packet is not broken for now */ | |
197 | while (ext_feat & A2MP_FEAT_EXT) { | |
198 | if (len < sizeof(ext_feat)) | |
199 | return -EINVAL; | |
200 | ||
201 | ext_feat = get_unaligned_le16(skb->data); | |
202 | BT_DBG("efm 0x%4.4x", ext_feat); | |
203 | len -= sizeof(ext_feat); | |
204 | skb_pull(skb, sizeof(ext_feat)); | |
205 | } | |
206 | ||
207 | cl = (void *) skb->data; | |
208 | while (len >= sizeof(*cl)) { | |
209 | BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type, | |
210 | cl->status); | |
211 | ||
a646bd81 | 212 | if (cl->id != AMP_ID_BREDR && cl->type != AMP_TYPE_BREDR) { |
aa09537d AE |
213 | struct a2mp_info_req req; |
214 | ||
2766be48 | 215 | found = true; |
aa09537d AE |
216 | req.id = cl->id; |
217 | a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr), | |
218 | sizeof(req), &req); | |
219 | } | |
220 | ||
221 | len -= sizeof(*cl); | |
222 | cl = (void *) skb_pull(skb, sizeof(*cl)); | |
223 | } | |
224 | ||
2766be48 AE |
225 | /* Fall back to L2CAP init sequence */ |
226 | if (!found) { | |
227 | struct l2cap_conn *conn = mgr->l2cap_conn; | |
228 | struct l2cap_chan *chan; | |
229 | ||
230 | mutex_lock(&conn->chan_lock); | |
231 | ||
232 | list_for_each_entry(chan, &conn->chan_l, list) { | |
233 | ||
234 | BT_DBG("chan %p state %s", chan, | |
235 | state_to_string(chan->state)); | |
236 | ||
2338a7e0 | 237 | if (chan->scid == L2CAP_CID_A2MP) |
2766be48 AE |
238 | continue; |
239 | ||
240 | l2cap_chan_lock(chan); | |
241 | ||
242 | if (chan->state == BT_CONNECT) | |
243 | l2cap_send_conn_req(chan); | |
244 | ||
245 | l2cap_chan_unlock(chan); | |
246 | } | |
247 | ||
248 | mutex_unlock(&conn->chan_lock); | |
249 | } | |
250 | ||
aa09537d AE |
251 | return 0; |
252 | } | |
253 | ||
329d81af AE |
254 | static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb, |
255 | struct a2mp_cmd *hdr) | |
256 | { | |
257 | struct a2mp_cl *cl = (void *) skb->data; | |
258 | ||
259 | while (skb->len >= sizeof(*cl)) { | |
260 | BT_DBG("Controller id %d type %d status %d", cl->id, cl->type, | |
261 | cl->status); | |
262 | cl = (struct a2mp_cl *) skb_pull(skb, sizeof(*cl)); | |
263 | } | |
264 | ||
265 | /* TODO send A2MP_CHANGE_RSP */ | |
266 | ||
267 | return 0; | |
268 | } | |
269 | ||
47f2d97d AE |
270 | static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb, |
271 | struct a2mp_cmd *hdr) | |
272 | { | |
273 | struct a2mp_info_req *req = (void *) skb->data; | |
47f2d97d AE |
274 | struct hci_dev *hdev; |
275 | ||
276 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
277 | return -EINVAL; | |
278 | ||
279 | BT_DBG("id %d", req->id); | |
280 | ||
47f2d97d | 281 | hdev = hci_dev_get(req->id); |
bc8dce4f | 282 | if (!hdev || hdev->dev_type != HCI_AMP) { |
8e2a0d92 AE |
283 | struct a2mp_info_rsp rsp; |
284 | ||
285 | rsp.id = req->id; | |
286 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
287 | ||
288 | a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp), | |
289 | &rsp); | |
47f2d97d | 290 | |
bc8dce4f | 291 | goto done; |
8e2a0d92 | 292 | } |
47f2d97d | 293 | |
cb6801c6 | 294 | set_bit(READ_LOC_AMP_INFO, &mgr->state); |
bc8dce4f AE |
295 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL); |
296 | ||
297 | done: | |
298 | if (hdev) | |
299 | hci_dev_put(hdev); | |
47f2d97d AE |
300 | |
301 | skb_pull(skb, sizeof(*req)); | |
302 | return 0; | |
303 | } | |
304 | ||
0d868de9 AE |
305 | static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
306 | struct a2mp_cmd *hdr) | |
307 | { | |
308 | struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data; | |
309 | struct a2mp_amp_assoc_req req; | |
310 | struct amp_ctrl *ctrl; | |
311 | ||
312 | if (le16_to_cpu(hdr->len) < sizeof(*rsp)) | |
313 | return -EINVAL; | |
314 | ||
315 | BT_DBG("id %d status 0x%2.2x", rsp->id, rsp->status); | |
316 | ||
317 | if (rsp->status) | |
318 | return -EINVAL; | |
319 | ||
fa4ebc66 | 320 | ctrl = amp_ctrl_add(mgr, rsp->id); |
0d868de9 AE |
321 | if (!ctrl) |
322 | return -ENOMEM; | |
323 | ||
0d868de9 AE |
324 | req.id = rsp->id; |
325 | a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req), | |
326 | &req); | |
327 | ||
328 | skb_pull(skb, sizeof(*rsp)); | |
329 | return 0; | |
330 | } | |
331 | ||
a28381dc AE |
332 | static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb, |
333 | struct a2mp_cmd *hdr) | |
334 | { | |
335 | struct a2mp_amp_assoc_req *req = (void *) skb->data; | |
336 | struct hci_dev *hdev; | |
903e4541 | 337 | struct amp_mgr *tmp; |
a28381dc AE |
338 | |
339 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
340 | return -EINVAL; | |
341 | ||
342 | BT_DBG("id %d", req->id); | |
343 | ||
903e4541 AE |
344 | /* Make sure that other request is not processed */ |
345 | tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
346 | ||
a28381dc | 347 | hdev = hci_dev_get(req->id); |
ece69126 | 348 | if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) { |
a28381dc AE |
349 | struct a2mp_amp_assoc_rsp rsp; |
350 | rsp.id = req->id; | |
903e4541 AE |
351 | |
352 | if (tmp) { | |
353 | rsp.status = A2MP_STATUS_COLLISION_OCCURED; | |
354 | amp_mgr_put(tmp); | |
355 | } else { | |
356 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
357 | } | |
a28381dc AE |
358 | |
359 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp), | |
360 | &rsp); | |
903e4541 AE |
361 | |
362 | goto done; | |
a28381dc AE |
363 | } |
364 | ||
903e4541 | 365 | amp_read_loc_assoc(hdev, mgr); |
a28381dc | 366 | |
903e4541 | 367 | done: |
a28381dc AE |
368 | if (hdev) |
369 | hci_dev_put(hdev); | |
370 | ||
371 | skb_pull(skb, sizeof(*req)); | |
372 | return 0; | |
373 | } | |
374 | ||
9a5e94db AE |
375 | static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
376 | struct a2mp_cmd *hdr) | |
377 | { | |
378 | struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data; | |
379 | u16 len = le16_to_cpu(hdr->len); | |
380 | struct hci_dev *hdev; | |
381 | struct amp_ctrl *ctrl; | |
382 | struct hci_conn *hcon; | |
13465c0a | 383 | size_t assoc_len; |
9a5e94db AE |
384 | |
385 | if (len < sizeof(*rsp)) | |
386 | return -EINVAL; | |
387 | ||
13465c0a AE |
388 | assoc_len = len - sizeof(*rsp); |
389 | ||
390 | BT_DBG("id %d status 0x%2.2x assoc len %zu", rsp->id, rsp->status, | |
391 | assoc_len); | |
9a5e94db AE |
392 | |
393 | if (rsp->status) | |
394 | return -EINVAL; | |
395 | ||
396 | /* Save remote ASSOC data */ | |
397 | ctrl = amp_ctrl_lookup(mgr, rsp->id); | |
398 | if (ctrl) { | |
13465c0a | 399 | u8 *assoc; |
9a5e94db | 400 | |
5ae327f0 | 401 | assoc = kmemdup(rsp->amp_assoc, assoc_len, GFP_KERNEL); |
9a5e94db AE |
402 | if (!assoc) { |
403 | amp_ctrl_put(ctrl); | |
404 | return -ENOMEM; | |
405 | } | |
406 | ||
9a5e94db AE |
407 | ctrl->assoc = assoc; |
408 | ctrl->assoc_len = assoc_len; | |
409 | ctrl->assoc_rem_len = assoc_len; | |
410 | ctrl->assoc_len_so_far = 0; | |
411 | ||
412 | amp_ctrl_put(ctrl); | |
413 | } | |
414 | ||
415 | /* Create Phys Link */ | |
416 | hdev = hci_dev_get(rsp->id); | |
417 | if (!hdev) | |
418 | return -EINVAL; | |
419 | ||
a0c234fe | 420 | hcon = phylink_add(hdev, mgr, rsp->id, true); |
9a5e94db AE |
421 | if (!hcon) |
422 | goto done; | |
423 | ||
424 | BT_DBG("Created hcon %p: loc:%d -> rem:%d", hcon, hdev->id, rsp->id); | |
425 | ||
fffadc08 | 426 | mgr->bredr_chan->remote_amp_id = rsp->id; |
9495b2ee | 427 | |
a02226d6 AE |
428 | amp_create_phylink(hdev, mgr, hcon); |
429 | ||
9a5e94db AE |
430 | done: |
431 | hci_dev_put(hdev); | |
432 | skb_pull(skb, len); | |
433 | return 0; | |
434 | } | |
435 | ||
e072f5da AE |
436 | static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
437 | struct a2mp_cmd *hdr) | |
438 | { | |
439 | struct a2mp_physlink_req *req = (void *) skb->data; | |
440 | ||
441 | struct a2mp_physlink_rsp rsp; | |
442 | struct hci_dev *hdev; | |
cb8488c0 | 443 | struct hci_conn *hcon; |
0b26ab9d | 444 | struct amp_ctrl *ctrl; |
e072f5da AE |
445 | |
446 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
447 | return -EINVAL; | |
448 | ||
449 | BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id); | |
450 | ||
451 | rsp.local_id = req->remote_id; | |
452 | rsp.remote_id = req->local_id; | |
453 | ||
454 | hdev = hci_dev_get(req->remote_id); | |
ece69126 | 455 | if (!hdev || hdev->amp_type == AMP_TYPE_BREDR) { |
e072f5da AE |
456 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; |
457 | goto send_rsp; | |
458 | } | |
459 | ||
0b26ab9d AE |
460 | ctrl = amp_ctrl_lookup(mgr, rsp.remote_id); |
461 | if (!ctrl) { | |
fa4ebc66 | 462 | ctrl = amp_ctrl_add(mgr, rsp.remote_id); |
0b26ab9d AE |
463 | if (ctrl) { |
464 | amp_ctrl_get(ctrl); | |
465 | } else { | |
466 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
467 | goto send_rsp; | |
468 | } | |
469 | } | |
470 | ||
471 | if (ctrl) { | |
13465c0a AE |
472 | size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req); |
473 | u8 *assoc; | |
0b26ab9d | 474 | |
5ae327f0 | 475 | assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL); |
0b26ab9d AE |
476 | if (!assoc) { |
477 | amp_ctrl_put(ctrl); | |
478 | return -ENOMEM; | |
479 | } | |
480 | ||
0b26ab9d AE |
481 | ctrl->assoc = assoc; |
482 | ctrl->assoc_len = assoc_len; | |
483 | ctrl->assoc_rem_len = assoc_len; | |
484 | ctrl->assoc_len_so_far = 0; | |
485 | ||
486 | amp_ctrl_put(ctrl); | |
487 | } | |
488 | ||
a0c234fe | 489 | hcon = phylink_add(hdev, mgr, req->local_id, false); |
cb8488c0 | 490 | if (hcon) { |
dffa3871 | 491 | amp_accept_phylink(hdev, mgr, hcon); |
cb8488c0 AE |
492 | rsp.status = A2MP_STATUS_SUCCESS; |
493 | } else { | |
494 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
495 | } | |
e072f5da AE |
496 | |
497 | send_rsp: | |
498 | if (hdev) | |
499 | hci_dev_put(hdev); | |
500 | ||
8e05e3ba AE |
501 | /* Reply error now and success after HCI Write Remote AMP Assoc |
502 | command complete with success status | |
503 | */ | |
504 | if (rsp.status != A2MP_STATUS_SUCCESS) { | |
505 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, | |
506 | sizeof(rsp), &rsp); | |
507 | } else { | |
cb6801c6 | 508 | set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state); |
8e05e3ba AE |
509 | mgr->ident = hdr->ident; |
510 | } | |
e072f5da AE |
511 | |
512 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
513 | return 0; | |
514 | } | |
515 | ||
6113f84f AE |
516 | static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
517 | struct a2mp_cmd *hdr) | |
518 | { | |
519 | struct a2mp_physlink_req *req = (void *) skb->data; | |
520 | struct a2mp_physlink_rsp rsp; | |
521 | struct hci_dev *hdev; | |
cb8488c0 | 522 | struct hci_conn *hcon; |
6113f84f AE |
523 | |
524 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
525 | return -EINVAL; | |
526 | ||
527 | BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id); | |
528 | ||
529 | rsp.local_id = req->remote_id; | |
530 | rsp.remote_id = req->local_id; | |
531 | rsp.status = A2MP_STATUS_SUCCESS; | |
532 | ||
cb8488c0 | 533 | hdev = hci_dev_get(req->remote_id); |
6113f84f AE |
534 | if (!hdev) { |
535 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
536 | goto send_rsp; | |
537 | } | |
538 | ||
bdc8ead2 MH |
539 | hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, |
540 | &mgr->l2cap_conn->hcon->dst); | |
cb8488c0 AE |
541 | if (!hcon) { |
542 | BT_ERR("No phys link exist"); | |
543 | rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS; | |
544 | goto clean; | |
545 | } | |
546 | ||
6113f84f AE |
547 | /* TODO Disconnect Phys Link here */ |
548 | ||
cb8488c0 | 549 | clean: |
6113f84f AE |
550 | hci_dev_put(hdev); |
551 | ||
552 | send_rsp: | |
553 | a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp); | |
554 | ||
555 | skb_pull(skb, sizeof(*req)); | |
556 | return 0; | |
557 | } | |
558 | ||
f6410a84 AE |
559 | static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
560 | struct a2mp_cmd *hdr) | |
561 | { | |
8e8c7e36 | 562 | BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code); |
f6410a84 AE |
563 | |
564 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
565 | return 0; | |
566 | } | |
567 | ||
6b44d9b8 AE |
568 | /* Handle A2MP signalling */ |
569 | static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) | |
570 | { | |
d9fc1d54 | 571 | struct a2mp_cmd *hdr; |
6b44d9b8 AE |
572 | struct amp_mgr *mgr = chan->data; |
573 | int err = 0; | |
574 | ||
575 | amp_mgr_get(mgr); | |
576 | ||
577 | while (skb->len >= sizeof(*hdr)) { | |
d9fc1d54 AE |
578 | u16 len; |
579 | ||
580 | hdr = (void *) skb->data; | |
581 | len = le16_to_cpu(hdr->len); | |
6b44d9b8 | 582 | |
8e8c7e36 | 583 | BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len); |
6b44d9b8 AE |
584 | |
585 | skb_pull(skb, sizeof(*hdr)); | |
586 | ||
587 | if (len > skb->len || !hdr->ident) { | |
588 | err = -EINVAL; | |
589 | break; | |
590 | } | |
591 | ||
592 | mgr->ident = hdr->ident; | |
593 | ||
594 | switch (hdr->code) { | |
595 | case A2MP_COMMAND_REJ: | |
21dbd2ce AE |
596 | a2mp_command_rej(mgr, skb, hdr); |
597 | break; | |
598 | ||
6b44d9b8 | 599 | case A2MP_DISCOVER_REQ: |
8598d064 AE |
600 | err = a2mp_discover_req(mgr, skb, hdr); |
601 | break; | |
602 | ||
6b44d9b8 | 603 | case A2MP_CHANGE_NOTIFY: |
329d81af AE |
604 | err = a2mp_change_notify(mgr, skb, hdr); |
605 | break; | |
606 | ||
6b44d9b8 | 607 | case A2MP_GETINFO_REQ: |
47f2d97d AE |
608 | err = a2mp_getinfo_req(mgr, skb, hdr); |
609 | break; | |
610 | ||
6b44d9b8 | 611 | case A2MP_GETAMPASSOC_REQ: |
a28381dc AE |
612 | err = a2mp_getampassoc_req(mgr, skb, hdr); |
613 | break; | |
614 | ||
6b44d9b8 | 615 | case A2MP_CREATEPHYSLINK_REQ: |
e072f5da AE |
616 | err = a2mp_createphyslink_req(mgr, skb, hdr); |
617 | break; | |
618 | ||
6b44d9b8 | 619 | case A2MP_DISCONNPHYSLINK_REQ: |
6113f84f AE |
620 | err = a2mp_discphyslink_req(mgr, skb, hdr); |
621 | break; | |
622 | ||
6b44d9b8 | 623 | case A2MP_DISCOVER_RSP: |
aa09537d AE |
624 | err = a2mp_discover_rsp(mgr, skb, hdr); |
625 | break; | |
626 | ||
6b44d9b8 | 627 | case A2MP_GETINFO_RSP: |
0d868de9 AE |
628 | err = a2mp_getinfo_rsp(mgr, skb, hdr); |
629 | break; | |
630 | ||
6b44d9b8 | 631 | case A2MP_GETAMPASSOC_RSP: |
9a5e94db AE |
632 | err = a2mp_getampassoc_rsp(mgr, skb, hdr); |
633 | break; | |
634 | ||
635 | case A2MP_CHANGE_RSP: | |
6b44d9b8 AE |
636 | case A2MP_CREATEPHYSLINK_RSP: |
637 | case A2MP_DISCONNPHYSLINK_RSP: | |
f6410a84 AE |
638 | err = a2mp_cmd_rsp(mgr, skb, hdr); |
639 | break; | |
640 | ||
6b44d9b8 AE |
641 | default: |
642 | BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code); | |
643 | err = -EINVAL; | |
644 | break; | |
645 | } | |
646 | } | |
647 | ||
648 | if (err) { | |
649 | struct a2mp_cmd_rej rej; | |
d9fc1d54 | 650 | |
dcf4adbf | 651 | rej.reason = cpu_to_le16(0); |
d9fc1d54 | 652 | hdr = (void *) skb->data; |
6b44d9b8 AE |
653 | |
654 | BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err); | |
655 | ||
656 | a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej), | |
657 | &rej); | |
658 | } | |
659 | ||
660 | /* Always free skb and return success error code to prevent | |
661 | from sending L2CAP Disconnect over A2MP channel */ | |
662 | kfree_skb(skb); | |
663 | ||
664 | amp_mgr_put(mgr); | |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
46d5c908 AE |
669 | static void a2mp_chan_close_cb(struct l2cap_chan *chan) |
670 | { | |
4af66c69 | 671 | l2cap_chan_put(chan); |
46d5c908 AE |
672 | } |
673 | ||
53f52121 GP |
674 | static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state, |
675 | int err) | |
46d5c908 AE |
676 | { |
677 | struct amp_mgr *mgr = chan->data; | |
678 | ||
679 | if (!mgr) | |
680 | return; | |
681 | ||
682 | BT_DBG("chan %p state %s", chan, state_to_string(state)); | |
683 | ||
684 | chan->state = state; | |
685 | ||
686 | switch (state) { | |
687 | case BT_CLOSED: | |
688 | if (mgr) | |
689 | amp_mgr_put(mgr); | |
690 | break; | |
691 | } | |
692 | } | |
693 | ||
694 | static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan, | |
d9fbd02b | 695 | unsigned long hdr_len, |
46d5c908 AE |
696 | unsigned long len, int nb) |
697 | { | |
0753c182 GP |
698 | struct sk_buff *skb; |
699 | ||
d9fbd02b | 700 | skb = bt_skb_alloc(hdr_len + len, GFP_KERNEL); |
0753c182 GP |
701 | if (!skb) |
702 | return ERR_PTR(-ENOMEM); | |
703 | ||
704 | return skb; | |
46d5c908 AE |
705 | } |
706 | ||
67f86a45 | 707 | static const struct l2cap_ops a2mp_chan_ops = { |
466f8004 | 708 | .name = "L2CAP A2MP channel", |
6b44d9b8 | 709 | .recv = a2mp_chan_recv_cb, |
46d5c908 AE |
710 | .close = a2mp_chan_close_cb, |
711 | .state_change = a2mp_chan_state_change_cb, | |
712 | .alloc_skb = a2mp_chan_alloc_skb_cb, | |
713 | ||
714 | /* Not implemented for A2MP */ | |
7e1af8a3 GP |
715 | .new_connection = l2cap_chan_no_new_connection, |
716 | .teardown = l2cap_chan_no_teardown, | |
717 | .ready = l2cap_chan_no_ready, | |
2dc4e510 | 718 | .defer = l2cap_chan_no_defer, |
2ce5fb51 | 719 | .resume = l2cap_chan_no_resume, |
5ec1bbe5 | 720 | .set_shutdown = l2cap_chan_no_set_shutdown, |
8d836d71 | 721 | .get_sndtimeo = l2cap_chan_no_get_sndtimeo, |
466f8004 AE |
722 | }; |
723 | ||
93c3e8f5 | 724 | static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked) |
466f8004 AE |
725 | { |
726 | struct l2cap_chan *chan; | |
727 | int err; | |
728 | ||
729 | chan = l2cap_chan_create(); | |
730 | if (!chan) | |
731 | return NULL; | |
732 | ||
733 | BT_DBG("chan %p", chan); | |
734 | ||
2338a7e0 JH |
735 | chan->chan_type = L2CAP_CHAN_FIXED; |
736 | chan->scid = L2CAP_CID_A2MP; | |
737 | chan->dcid = L2CAP_CID_A2MP; | |
738 | chan->omtu = L2CAP_A2MP_DEFAULT_MTU; | |
739 | chan->imtu = L2CAP_A2MP_DEFAULT_MTU; | |
466f8004 AE |
740 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
741 | ||
742 | chan->ops = &a2mp_chan_ops; | |
743 | ||
744 | l2cap_chan_set_defaults(chan); | |
745 | chan->remote_max_tx = chan->max_tx; | |
746 | chan->remote_tx_win = chan->tx_win; | |
747 | ||
748 | chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
749 | chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
750 | ||
751 | skb_queue_head_init(&chan->tx_q); | |
752 | ||
753 | chan->mode = L2CAP_MODE_ERTM; | |
754 | ||
755 | err = l2cap_ertm_init(chan); | |
756 | if (err < 0) { | |
757 | l2cap_chan_del(chan, 0); | |
758 | return NULL; | |
759 | } | |
760 | ||
761 | chan->conf_state = 0; | |
762 | ||
93c3e8f5 AE |
763 | if (locked) |
764 | __l2cap_chan_add(conn, chan); | |
765 | else | |
766 | l2cap_chan_add(conn, chan); | |
466f8004 AE |
767 | |
768 | chan->remote_mps = chan->omtu; | |
769 | chan->mps = chan->omtu; | |
770 | ||
771 | chan->state = BT_CONNECTED; | |
772 | ||
773 | return chan; | |
774 | } | |
9740e49d AE |
775 | |
776 | /* AMP Manager functions */ | |
f706adfe | 777 | struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr) |
9740e49d | 778 | { |
a0dfe0ab | 779 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
780 | |
781 | kref_get(&mgr->kref); | |
f706adfe AE |
782 | |
783 | return mgr; | |
9740e49d AE |
784 | } |
785 | ||
786 | static void amp_mgr_destroy(struct kref *kref) | |
787 | { | |
788 | struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref); | |
789 | ||
790 | BT_DBG("mgr %p", mgr); | |
791 | ||
f97268fc AE |
792 | mutex_lock(&_mgr_list_lock); |
793 | list_del(&mgr->list); | |
794 | mutex_unlock(&_mgr_list_lock); | |
795 | ||
52c0d6e5 | 796 | amp_ctrl_list_flush(mgr); |
9740e49d AE |
797 | kfree(mgr); |
798 | } | |
799 | ||
800 | int amp_mgr_put(struct amp_mgr *mgr) | |
801 | { | |
a0dfe0ab | 802 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
803 | |
804 | return kref_put(&mgr->kref, &_mgr_destroy); | |
805 | } | |
806 | ||
93c3e8f5 | 807 | static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked) |
9740e49d AE |
808 | { |
809 | struct amp_mgr *mgr; | |
810 | struct l2cap_chan *chan; | |
811 | ||
812 | mgr = kzalloc(sizeof(*mgr), GFP_KERNEL); | |
813 | if (!mgr) | |
814 | return NULL; | |
815 | ||
816 | BT_DBG("conn %p mgr %p", conn, mgr); | |
817 | ||
818 | mgr->l2cap_conn = conn; | |
819 | ||
93c3e8f5 | 820 | chan = a2mp_chan_open(conn, locked); |
9740e49d AE |
821 | if (!chan) { |
822 | kfree(mgr); | |
823 | return NULL; | |
824 | } | |
825 | ||
826 | mgr->a2mp_chan = chan; | |
827 | chan->data = mgr; | |
828 | ||
829 | conn->hcon->amp_mgr = mgr; | |
830 | ||
831 | kref_init(&mgr->kref); | |
832 | ||
52c0d6e5 AE |
833 | /* Remote AMP ctrl list initialization */ |
834 | INIT_LIST_HEAD(&mgr->amp_ctrls); | |
835 | mutex_init(&mgr->amp_ctrls_lock); | |
836 | ||
f97268fc AE |
837 | mutex_lock(&_mgr_list_lock); |
838 | list_add(&mgr->list, &_mgr_list); | |
839 | mutex_unlock(&_mgr_list_lock); | |
840 | ||
9740e49d AE |
841 | return mgr; |
842 | } | |
97e8e89d AE |
843 | |
844 | struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn, | |
845 | struct sk_buff *skb) | |
846 | { | |
847 | struct amp_mgr *mgr; | |
848 | ||
07e307f8 JH |
849 | if (conn->hcon->type != ACL_LINK) |
850 | return NULL; | |
851 | ||
93c3e8f5 | 852 | mgr = amp_mgr_create(conn, false); |
97e8e89d AE |
853 | if (!mgr) { |
854 | BT_ERR("Could not create AMP manager"); | |
855 | return NULL; | |
856 | } | |
857 | ||
858 | BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan); | |
859 | ||
860 | return mgr->a2mp_chan; | |
861 | } | |
f97268fc AE |
862 | |
863 | struct amp_mgr *amp_mgr_lookup_by_state(u8 state) | |
864 | { | |
865 | struct amp_mgr *mgr; | |
866 | ||
867 | mutex_lock(&_mgr_list_lock); | |
868 | list_for_each_entry(mgr, &_mgr_list, list) { | |
cb6801c6 | 869 | if (test_and_clear_bit(state, &mgr->state)) { |
f97268fc AE |
870 | amp_mgr_get(mgr); |
871 | mutex_unlock(&_mgr_list_lock); | |
872 | return mgr; | |
873 | } | |
874 | } | |
875 | mutex_unlock(&_mgr_list_lock); | |
876 | ||
877 | return NULL; | |
878 | } | |
8e2a0d92 AE |
879 | |
880 | void a2mp_send_getinfo_rsp(struct hci_dev *hdev) | |
881 | { | |
882 | struct amp_mgr *mgr; | |
883 | struct a2mp_info_rsp rsp; | |
884 | ||
885 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO); | |
886 | if (!mgr) | |
887 | return; | |
888 | ||
889 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
890 | ||
891 | rsp.id = hdev->id; | |
892 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
893 | ||
ece69126 | 894 | if (hdev->amp_type != AMP_TYPE_BREDR) { |
8e2a0d92 AE |
895 | rsp.status = 0; |
896 | rsp.total_bw = cpu_to_le32(hdev->amp_total_bw); | |
897 | rsp.max_bw = cpu_to_le32(hdev->amp_max_bw); | |
898 | rsp.min_latency = cpu_to_le32(hdev->amp_min_latency); | |
899 | rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap); | |
900 | rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size); | |
901 | } | |
902 | ||
903 | a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp); | |
904 | amp_mgr_put(mgr); | |
905 | } | |
903e4541 AE |
906 | |
907 | void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status) | |
908 | { | |
909 | struct amp_mgr *mgr; | |
910 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
911 | struct a2mp_amp_assoc_rsp *rsp; | |
912 | size_t len; | |
913 | ||
914 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
915 | if (!mgr) | |
916 | return; | |
917 | ||
918 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
919 | ||
920 | len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len; | |
921 | rsp = kzalloc(len, GFP_KERNEL); | |
922 | if (!rsp) { | |
923 | amp_mgr_put(mgr); | |
924 | return; | |
925 | } | |
926 | ||
927 | rsp->id = hdev->id; | |
928 | ||
929 | if (status) { | |
930 | rsp->status = A2MP_STATUS_INVALID_CTRL_ID; | |
931 | } else { | |
932 | rsp->status = A2MP_STATUS_SUCCESS; | |
933 | memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len); | |
934 | } | |
935 | ||
936 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp); | |
937 | amp_mgr_put(mgr); | |
938 | kfree(rsp); | |
939 | } | |
93c3e8f5 | 940 | |
9495b2ee AE |
941 | void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status) |
942 | { | |
943 | struct amp_mgr *mgr; | |
944 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
945 | struct a2mp_physlink_req *req; | |
946 | struct l2cap_chan *bredr_chan; | |
947 | size_t len; | |
948 | ||
949 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL); | |
950 | if (!mgr) | |
951 | return; | |
952 | ||
953 | len = sizeof(*req) + loc_assoc->len; | |
954 | ||
955 | BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len); | |
956 | ||
957 | req = kzalloc(len, GFP_KERNEL); | |
958 | if (!req) { | |
959 | amp_mgr_put(mgr); | |
960 | return; | |
961 | } | |
962 | ||
963 | bredr_chan = mgr->bredr_chan; | |
964 | if (!bredr_chan) | |
965 | goto clean; | |
966 | ||
967 | req->local_id = hdev->id; | |
fffadc08 | 968 | req->remote_id = bredr_chan->remote_amp_id; |
9495b2ee AE |
969 | memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len); |
970 | ||
971 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req); | |
972 | ||
973 | clean: | |
974 | amp_mgr_put(mgr); | |
975 | kfree(req); | |
976 | } | |
977 | ||
8e05e3ba AE |
978 | void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status) |
979 | { | |
980 | struct amp_mgr *mgr; | |
981 | struct a2mp_physlink_rsp rsp; | |
982 | struct hci_conn *hs_hcon; | |
983 | ||
984 | mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC); | |
985 | if (!mgr) | |
986 | return; | |
987 | ||
988 | hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT); | |
989 | if (!hs_hcon) { | |
990 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
991 | } else { | |
992 | rsp.remote_id = hs_hcon->remote_id; | |
993 | rsp.status = A2MP_STATUS_SUCCESS; | |
994 | } | |
995 | ||
996 | BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon, | |
997 | status); | |
998 | ||
999 | rsp.local_id = hdev->id; | |
1000 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp); | |
1001 | amp_mgr_put(mgr); | |
1002 | } | |
1003 | ||
93c3e8f5 AE |
1004 | void a2mp_discover_amp(struct l2cap_chan *chan) |
1005 | { | |
1006 | struct l2cap_conn *conn = chan->conn; | |
1007 | struct amp_mgr *mgr = conn->hcon->amp_mgr; | |
1008 | struct a2mp_discov_req req; | |
1009 | ||
1010 | BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr); | |
1011 | ||
1012 | if (!mgr) { | |
1013 | mgr = amp_mgr_create(conn, true); | |
1014 | if (!mgr) | |
1015 | return; | |
1016 | } | |
1017 | ||
1018 | mgr->bredr_chan = chan; | |
1019 | ||
1020 | req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); | |
1021 | req.ext_feat = 0; | |
1022 | a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req); | |
1023 | } |