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Commit | Line | Data |
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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 | ||
63 | msg.msg_iov = (struct iovec *) &iv; | |
64 | msg.msg_iovlen = 1; | |
65 | ||
8d46321c | 66 | l2cap_chan_send(chan, &msg, total_len); |
f6d3c6e7 AE |
67 | |
68 | kfree(cmd); | |
69 | } | |
70 | ||
9495b2ee | 71 | u8 __next_ident(struct amp_mgr *mgr) |
aa09537d AE |
72 | { |
73 | if (++mgr->ident == 0) | |
74 | mgr->ident = 1; | |
75 | ||
76 | return mgr->ident; | |
77 | } | |
78 | ||
8598d064 | 79 | /* hci_dev_list shall be locked */ |
23f0cb41 | 80 | static void __a2mp_add_cl(struct amp_mgr *mgr, struct a2mp_cl *cl) |
8598d064 | 81 | { |
8598d064 | 82 | struct hci_dev *hdev; |
e8803534 | 83 | int i = 1; |
8598d064 | 84 | |
346e7099 MH |
85 | cl[0].id = AMP_ID_BREDR; |
86 | cl[0].type = AMP_TYPE_BREDR; | |
87 | cl[0].status = AMP_STATUS_BLUETOOTH_ONLY; | |
8598d064 AE |
88 | |
89 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
e8803534 MH |
90 | if (hdev->dev_type == HCI_AMP) { |
91 | cl[i].id = hdev->id; | |
92 | cl[i].type = hdev->amp_type; | |
cd0a85c2 MH |
93 | if (test_bit(HCI_UP, &hdev->flags)) |
94 | cl[i].status = hdev->amp_status; | |
95 | else | |
96 | cl[i].status = AMP_STATUS_POWERED_DOWN; | |
e8803534 MH |
97 | i++; |
98 | } | |
8598d064 AE |
99 | } |
100 | } | |
101 | ||
21dbd2ce AE |
102 | /* Processing A2MP messages */ |
103 | static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb, | |
104 | struct a2mp_cmd *hdr) | |
105 | { | |
106 | struct a2mp_cmd_rej *rej = (void *) skb->data; | |
107 | ||
108 | if (le16_to_cpu(hdr->len) < sizeof(*rej)) | |
109 | return -EINVAL; | |
110 | ||
111 | BT_DBG("ident %d reason %d", hdr->ident, le16_to_cpu(rej->reason)); | |
112 | ||
113 | skb_pull(skb, sizeof(*rej)); | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
8598d064 AE |
118 | static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb, |
119 | struct a2mp_cmd *hdr) | |
120 | { | |
121 | struct a2mp_discov_req *req = (void *) skb->data; | |
122 | u16 len = le16_to_cpu(hdr->len); | |
123 | struct a2mp_discov_rsp *rsp; | |
124 | u16 ext_feat; | |
125 | u8 num_ctrl; | |
f822c411 | 126 | struct hci_dev *hdev; |
8598d064 AE |
127 | |
128 | if (len < sizeof(*req)) | |
129 | return -EINVAL; | |
130 | ||
131 | skb_pull(skb, sizeof(*req)); | |
132 | ||
133 | ext_feat = le16_to_cpu(req->ext_feat); | |
134 | ||
135 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat); | |
136 | ||
137 | /* check that packet is not broken for now */ | |
138 | while (ext_feat & A2MP_FEAT_EXT) { | |
139 | if (len < sizeof(ext_feat)) | |
140 | return -EINVAL; | |
141 | ||
142 | ext_feat = get_unaligned_le16(skb->data); | |
143 | BT_DBG("efm 0x%4.4x", ext_feat); | |
144 | len -= sizeof(ext_feat); | |
145 | skb_pull(skb, sizeof(ext_feat)); | |
146 | } | |
147 | ||
148 | read_lock(&hci_dev_list_lock); | |
149 | ||
f822c411 MH |
150 | /* at minimum the BR/EDR needs to be listed */ |
151 | num_ctrl = 1; | |
152 | ||
153 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
154 | if (hdev->dev_type == HCI_AMP) | |
155 | num_ctrl++; | |
156 | } | |
157 | ||
8598d064 AE |
158 | len = num_ctrl * sizeof(struct a2mp_cl) + sizeof(*rsp); |
159 | rsp = kmalloc(len, GFP_ATOMIC); | |
160 | if (!rsp) { | |
161 | read_unlock(&hci_dev_list_lock); | |
162 | return -ENOMEM; | |
163 | } | |
164 | ||
dcf4adbf | 165 | rsp->mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); |
8598d064 AE |
166 | rsp->ext_feat = 0; |
167 | ||
23f0cb41 | 168 | __a2mp_add_cl(mgr, rsp->cl); |
8598d064 AE |
169 | |
170 | read_unlock(&hci_dev_list_lock); | |
171 | ||
172 | a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp); | |
173 | ||
174 | kfree(rsp); | |
175 | return 0; | |
176 | } | |
177 | ||
aa09537d AE |
178 | static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
179 | struct a2mp_cmd *hdr) | |
180 | { | |
181 | struct a2mp_discov_rsp *rsp = (void *) skb->data; | |
182 | u16 len = le16_to_cpu(hdr->len); | |
183 | struct a2mp_cl *cl; | |
184 | u16 ext_feat; | |
2766be48 | 185 | bool found = false; |
aa09537d AE |
186 | |
187 | if (len < sizeof(*rsp)) | |
188 | return -EINVAL; | |
189 | ||
190 | len -= sizeof(*rsp); | |
191 | skb_pull(skb, sizeof(*rsp)); | |
192 | ||
193 | ext_feat = le16_to_cpu(rsp->ext_feat); | |
194 | ||
195 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat); | |
196 | ||
197 | /* check that packet is not broken for now */ | |
198 | while (ext_feat & A2MP_FEAT_EXT) { | |
199 | if (len < sizeof(ext_feat)) | |
200 | return -EINVAL; | |
201 | ||
202 | ext_feat = get_unaligned_le16(skb->data); | |
203 | BT_DBG("efm 0x%4.4x", ext_feat); | |
204 | len -= sizeof(ext_feat); | |
205 | skb_pull(skb, sizeof(ext_feat)); | |
206 | } | |
207 | ||
208 | cl = (void *) skb->data; | |
209 | while (len >= sizeof(*cl)) { | |
210 | BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type, | |
211 | cl->status); | |
212 | ||
a646bd81 | 213 | if (cl->id != AMP_ID_BREDR && cl->type != AMP_TYPE_BREDR) { |
aa09537d AE |
214 | struct a2mp_info_req req; |
215 | ||
2766be48 | 216 | found = true; |
aa09537d AE |
217 | req.id = cl->id; |
218 | a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr), | |
219 | sizeof(req), &req); | |
220 | } | |
221 | ||
222 | len -= sizeof(*cl); | |
223 | cl = (void *) skb_pull(skb, sizeof(*cl)); | |
224 | } | |
225 | ||
2766be48 AE |
226 | /* Fall back to L2CAP init sequence */ |
227 | if (!found) { | |
228 | struct l2cap_conn *conn = mgr->l2cap_conn; | |
229 | struct l2cap_chan *chan; | |
230 | ||
231 | mutex_lock(&conn->chan_lock); | |
232 | ||
233 | list_for_each_entry(chan, &conn->chan_l, list) { | |
234 | ||
235 | BT_DBG("chan %p state %s", chan, | |
236 | state_to_string(chan->state)); | |
237 | ||
2338a7e0 | 238 | if (chan->scid == L2CAP_CID_A2MP) |
2766be48 AE |
239 | continue; |
240 | ||
241 | l2cap_chan_lock(chan); | |
242 | ||
243 | if (chan->state == BT_CONNECT) | |
244 | l2cap_send_conn_req(chan); | |
245 | ||
246 | l2cap_chan_unlock(chan); | |
247 | } | |
248 | ||
249 | mutex_unlock(&conn->chan_lock); | |
250 | } | |
251 | ||
aa09537d AE |
252 | return 0; |
253 | } | |
254 | ||
329d81af AE |
255 | static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb, |
256 | struct a2mp_cmd *hdr) | |
257 | { | |
258 | struct a2mp_cl *cl = (void *) skb->data; | |
259 | ||
260 | while (skb->len >= sizeof(*cl)) { | |
261 | BT_DBG("Controller id %d type %d status %d", cl->id, cl->type, | |
262 | cl->status); | |
263 | cl = (struct a2mp_cl *) skb_pull(skb, sizeof(*cl)); | |
264 | } | |
265 | ||
266 | /* TODO send A2MP_CHANGE_RSP */ | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
47f2d97d AE |
271 | static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb, |
272 | struct a2mp_cmd *hdr) | |
273 | { | |
274 | struct a2mp_info_req *req = (void *) skb->data; | |
47f2d97d AE |
275 | struct hci_dev *hdev; |
276 | ||
277 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
278 | return -EINVAL; | |
279 | ||
280 | BT_DBG("id %d", req->id); | |
281 | ||
47f2d97d | 282 | hdev = hci_dev_get(req->id); |
bc8dce4f | 283 | if (!hdev || hdev->dev_type != HCI_AMP) { |
8e2a0d92 AE |
284 | struct a2mp_info_rsp rsp; |
285 | ||
286 | rsp.id = req->id; | |
287 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
288 | ||
289 | a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp), | |
290 | &rsp); | |
47f2d97d | 291 | |
bc8dce4f | 292 | goto done; |
8e2a0d92 | 293 | } |
47f2d97d | 294 | |
cb6801c6 | 295 | set_bit(READ_LOC_AMP_INFO, &mgr->state); |
bc8dce4f AE |
296 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL); |
297 | ||
298 | done: | |
299 | if (hdev) | |
300 | hci_dev_put(hdev); | |
47f2d97d AE |
301 | |
302 | skb_pull(skb, sizeof(*req)); | |
303 | return 0; | |
304 | } | |
305 | ||
0d868de9 AE |
306 | static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
307 | struct a2mp_cmd *hdr) | |
308 | { | |
309 | struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data; | |
310 | struct a2mp_amp_assoc_req req; | |
311 | struct amp_ctrl *ctrl; | |
312 | ||
313 | if (le16_to_cpu(hdr->len) < sizeof(*rsp)) | |
314 | return -EINVAL; | |
315 | ||
316 | BT_DBG("id %d status 0x%2.2x", rsp->id, rsp->status); | |
317 | ||
318 | if (rsp->status) | |
319 | return -EINVAL; | |
320 | ||
fa4ebc66 | 321 | ctrl = amp_ctrl_add(mgr, rsp->id); |
0d868de9 AE |
322 | if (!ctrl) |
323 | return -ENOMEM; | |
324 | ||
0d868de9 AE |
325 | req.id = rsp->id; |
326 | a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req), | |
327 | &req); | |
328 | ||
329 | skb_pull(skb, sizeof(*rsp)); | |
330 | return 0; | |
331 | } | |
332 | ||
a28381dc AE |
333 | static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb, |
334 | struct a2mp_cmd *hdr) | |
335 | { | |
336 | struct a2mp_amp_assoc_req *req = (void *) skb->data; | |
337 | struct hci_dev *hdev; | |
903e4541 | 338 | struct amp_mgr *tmp; |
a28381dc AE |
339 | |
340 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
341 | return -EINVAL; | |
342 | ||
343 | BT_DBG("id %d", req->id); | |
344 | ||
903e4541 AE |
345 | /* Make sure that other request is not processed */ |
346 | tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
347 | ||
a28381dc | 348 | hdev = hci_dev_get(req->id); |
ece69126 | 349 | if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) { |
a28381dc AE |
350 | struct a2mp_amp_assoc_rsp rsp; |
351 | rsp.id = req->id; | |
903e4541 AE |
352 | |
353 | if (tmp) { | |
354 | rsp.status = A2MP_STATUS_COLLISION_OCCURED; | |
355 | amp_mgr_put(tmp); | |
356 | } else { | |
357 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
358 | } | |
a28381dc AE |
359 | |
360 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp), | |
361 | &rsp); | |
903e4541 AE |
362 | |
363 | goto done; | |
a28381dc AE |
364 | } |
365 | ||
903e4541 | 366 | amp_read_loc_assoc(hdev, mgr); |
a28381dc | 367 | |
903e4541 | 368 | done: |
a28381dc AE |
369 | if (hdev) |
370 | hci_dev_put(hdev); | |
371 | ||
372 | skb_pull(skb, sizeof(*req)); | |
373 | return 0; | |
374 | } | |
375 | ||
9a5e94db AE |
376 | static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
377 | struct a2mp_cmd *hdr) | |
378 | { | |
379 | struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data; | |
380 | u16 len = le16_to_cpu(hdr->len); | |
381 | struct hci_dev *hdev; | |
382 | struct amp_ctrl *ctrl; | |
383 | struct hci_conn *hcon; | |
13465c0a | 384 | size_t assoc_len; |
9a5e94db AE |
385 | |
386 | if (len < sizeof(*rsp)) | |
387 | return -EINVAL; | |
388 | ||
13465c0a AE |
389 | assoc_len = len - sizeof(*rsp); |
390 | ||
391 | BT_DBG("id %d status 0x%2.2x assoc len %zu", rsp->id, rsp->status, | |
392 | assoc_len); | |
9a5e94db AE |
393 | |
394 | if (rsp->status) | |
395 | return -EINVAL; | |
396 | ||
397 | /* Save remote ASSOC data */ | |
398 | ctrl = amp_ctrl_lookup(mgr, rsp->id); | |
399 | if (ctrl) { | |
13465c0a | 400 | u8 *assoc; |
9a5e94db | 401 | |
5ae327f0 | 402 | assoc = kmemdup(rsp->amp_assoc, assoc_len, GFP_KERNEL); |
9a5e94db AE |
403 | if (!assoc) { |
404 | amp_ctrl_put(ctrl); | |
405 | return -ENOMEM; | |
406 | } | |
407 | ||
9a5e94db AE |
408 | ctrl->assoc = assoc; |
409 | ctrl->assoc_len = assoc_len; | |
410 | ctrl->assoc_rem_len = assoc_len; | |
411 | ctrl->assoc_len_so_far = 0; | |
412 | ||
413 | amp_ctrl_put(ctrl); | |
414 | } | |
415 | ||
416 | /* Create Phys Link */ | |
417 | hdev = hci_dev_get(rsp->id); | |
418 | if (!hdev) | |
419 | return -EINVAL; | |
420 | ||
a0c234fe | 421 | hcon = phylink_add(hdev, mgr, rsp->id, true); |
9a5e94db AE |
422 | if (!hcon) |
423 | goto done; | |
424 | ||
425 | BT_DBG("Created hcon %p: loc:%d -> rem:%d", hcon, hdev->id, rsp->id); | |
426 | ||
fffadc08 | 427 | mgr->bredr_chan->remote_amp_id = rsp->id; |
9495b2ee | 428 | |
a02226d6 AE |
429 | amp_create_phylink(hdev, mgr, hcon); |
430 | ||
9a5e94db AE |
431 | done: |
432 | hci_dev_put(hdev); | |
433 | skb_pull(skb, len); | |
434 | return 0; | |
435 | } | |
436 | ||
e072f5da AE |
437 | static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
438 | struct a2mp_cmd *hdr) | |
439 | { | |
440 | struct a2mp_physlink_req *req = (void *) skb->data; | |
441 | ||
442 | struct a2mp_physlink_rsp rsp; | |
443 | struct hci_dev *hdev; | |
cb8488c0 | 444 | struct hci_conn *hcon; |
0b26ab9d | 445 | struct amp_ctrl *ctrl; |
e072f5da AE |
446 | |
447 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
448 | return -EINVAL; | |
449 | ||
450 | BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id); | |
451 | ||
452 | rsp.local_id = req->remote_id; | |
453 | rsp.remote_id = req->local_id; | |
454 | ||
455 | hdev = hci_dev_get(req->remote_id); | |
ece69126 | 456 | if (!hdev || hdev->amp_type == AMP_TYPE_BREDR) { |
e072f5da AE |
457 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; |
458 | goto send_rsp; | |
459 | } | |
460 | ||
0b26ab9d AE |
461 | ctrl = amp_ctrl_lookup(mgr, rsp.remote_id); |
462 | if (!ctrl) { | |
fa4ebc66 | 463 | ctrl = amp_ctrl_add(mgr, rsp.remote_id); |
0b26ab9d AE |
464 | if (ctrl) { |
465 | amp_ctrl_get(ctrl); | |
466 | } else { | |
467 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
468 | goto send_rsp; | |
469 | } | |
470 | } | |
471 | ||
472 | if (ctrl) { | |
13465c0a AE |
473 | size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req); |
474 | u8 *assoc; | |
0b26ab9d | 475 | |
5ae327f0 | 476 | assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL); |
0b26ab9d AE |
477 | if (!assoc) { |
478 | amp_ctrl_put(ctrl); | |
479 | return -ENOMEM; | |
480 | } | |
481 | ||
0b26ab9d AE |
482 | ctrl->assoc = assoc; |
483 | ctrl->assoc_len = assoc_len; | |
484 | ctrl->assoc_rem_len = assoc_len; | |
485 | ctrl->assoc_len_so_far = 0; | |
486 | ||
487 | amp_ctrl_put(ctrl); | |
488 | } | |
489 | ||
a0c234fe | 490 | hcon = phylink_add(hdev, mgr, req->local_id, false); |
cb8488c0 | 491 | if (hcon) { |
dffa3871 | 492 | amp_accept_phylink(hdev, mgr, hcon); |
cb8488c0 AE |
493 | rsp.status = A2MP_STATUS_SUCCESS; |
494 | } else { | |
495 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
496 | } | |
e072f5da AE |
497 | |
498 | send_rsp: | |
499 | if (hdev) | |
500 | hci_dev_put(hdev); | |
501 | ||
8e05e3ba AE |
502 | /* Reply error now and success after HCI Write Remote AMP Assoc |
503 | command complete with success status | |
504 | */ | |
505 | if (rsp.status != A2MP_STATUS_SUCCESS) { | |
506 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, | |
507 | sizeof(rsp), &rsp); | |
508 | } else { | |
cb6801c6 | 509 | set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state); |
8e05e3ba AE |
510 | mgr->ident = hdr->ident; |
511 | } | |
e072f5da AE |
512 | |
513 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
514 | return 0; | |
515 | } | |
516 | ||
6113f84f AE |
517 | static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
518 | struct a2mp_cmd *hdr) | |
519 | { | |
520 | struct a2mp_physlink_req *req = (void *) skb->data; | |
521 | struct a2mp_physlink_rsp rsp; | |
522 | struct hci_dev *hdev; | |
cb8488c0 | 523 | struct hci_conn *hcon; |
6113f84f AE |
524 | |
525 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
526 | return -EINVAL; | |
527 | ||
528 | BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id); | |
529 | ||
530 | rsp.local_id = req->remote_id; | |
531 | rsp.remote_id = req->local_id; | |
532 | rsp.status = A2MP_STATUS_SUCCESS; | |
533 | ||
cb8488c0 | 534 | hdev = hci_dev_get(req->remote_id); |
6113f84f AE |
535 | if (!hdev) { |
536 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
537 | goto send_rsp; | |
538 | } | |
539 | ||
bdc8ead2 MH |
540 | hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, |
541 | &mgr->l2cap_conn->hcon->dst); | |
cb8488c0 AE |
542 | if (!hcon) { |
543 | BT_ERR("No phys link exist"); | |
544 | rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS; | |
545 | goto clean; | |
546 | } | |
547 | ||
6113f84f AE |
548 | /* TODO Disconnect Phys Link here */ |
549 | ||
cb8488c0 | 550 | clean: |
6113f84f AE |
551 | hci_dev_put(hdev); |
552 | ||
553 | send_rsp: | |
554 | a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp); | |
555 | ||
556 | skb_pull(skb, sizeof(*req)); | |
557 | return 0; | |
558 | } | |
559 | ||
f6410a84 AE |
560 | static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
561 | struct a2mp_cmd *hdr) | |
562 | { | |
8e8c7e36 | 563 | BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code); |
f6410a84 AE |
564 | |
565 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
566 | return 0; | |
567 | } | |
568 | ||
6b44d9b8 AE |
569 | /* Handle A2MP signalling */ |
570 | static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) | |
571 | { | |
d9fc1d54 | 572 | struct a2mp_cmd *hdr; |
6b44d9b8 AE |
573 | struct amp_mgr *mgr = chan->data; |
574 | int err = 0; | |
575 | ||
576 | amp_mgr_get(mgr); | |
577 | ||
578 | while (skb->len >= sizeof(*hdr)) { | |
d9fc1d54 AE |
579 | u16 len; |
580 | ||
581 | hdr = (void *) skb->data; | |
582 | len = le16_to_cpu(hdr->len); | |
6b44d9b8 | 583 | |
8e8c7e36 | 584 | BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len); |
6b44d9b8 AE |
585 | |
586 | skb_pull(skb, sizeof(*hdr)); | |
587 | ||
588 | if (len > skb->len || !hdr->ident) { | |
589 | err = -EINVAL; | |
590 | break; | |
591 | } | |
592 | ||
593 | mgr->ident = hdr->ident; | |
594 | ||
595 | switch (hdr->code) { | |
596 | case A2MP_COMMAND_REJ: | |
21dbd2ce AE |
597 | a2mp_command_rej(mgr, skb, hdr); |
598 | break; | |
599 | ||
6b44d9b8 | 600 | case A2MP_DISCOVER_REQ: |
8598d064 AE |
601 | err = a2mp_discover_req(mgr, skb, hdr); |
602 | break; | |
603 | ||
6b44d9b8 | 604 | case A2MP_CHANGE_NOTIFY: |
329d81af AE |
605 | err = a2mp_change_notify(mgr, skb, hdr); |
606 | break; | |
607 | ||
6b44d9b8 | 608 | case A2MP_GETINFO_REQ: |
47f2d97d AE |
609 | err = a2mp_getinfo_req(mgr, skb, hdr); |
610 | break; | |
611 | ||
6b44d9b8 | 612 | case A2MP_GETAMPASSOC_REQ: |
a28381dc AE |
613 | err = a2mp_getampassoc_req(mgr, skb, hdr); |
614 | break; | |
615 | ||
6b44d9b8 | 616 | case A2MP_CREATEPHYSLINK_REQ: |
e072f5da AE |
617 | err = a2mp_createphyslink_req(mgr, skb, hdr); |
618 | break; | |
619 | ||
6b44d9b8 | 620 | case A2MP_DISCONNPHYSLINK_REQ: |
6113f84f AE |
621 | err = a2mp_discphyslink_req(mgr, skb, hdr); |
622 | break; | |
623 | ||
6b44d9b8 | 624 | case A2MP_DISCOVER_RSP: |
aa09537d AE |
625 | err = a2mp_discover_rsp(mgr, skb, hdr); |
626 | break; | |
627 | ||
6b44d9b8 | 628 | case A2MP_GETINFO_RSP: |
0d868de9 AE |
629 | err = a2mp_getinfo_rsp(mgr, skb, hdr); |
630 | break; | |
631 | ||
6b44d9b8 | 632 | case A2MP_GETAMPASSOC_RSP: |
9a5e94db AE |
633 | err = a2mp_getampassoc_rsp(mgr, skb, hdr); |
634 | break; | |
635 | ||
636 | case A2MP_CHANGE_RSP: | |
6b44d9b8 AE |
637 | case A2MP_CREATEPHYSLINK_RSP: |
638 | case A2MP_DISCONNPHYSLINK_RSP: | |
f6410a84 AE |
639 | err = a2mp_cmd_rsp(mgr, skb, hdr); |
640 | break; | |
641 | ||
6b44d9b8 AE |
642 | default: |
643 | BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code); | |
644 | err = -EINVAL; | |
645 | break; | |
646 | } | |
647 | } | |
648 | ||
649 | if (err) { | |
650 | struct a2mp_cmd_rej rej; | |
d9fc1d54 | 651 | |
dcf4adbf | 652 | rej.reason = cpu_to_le16(0); |
d9fc1d54 | 653 | hdr = (void *) skb->data; |
6b44d9b8 AE |
654 | |
655 | BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err); | |
656 | ||
657 | a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej), | |
658 | &rej); | |
659 | } | |
660 | ||
661 | /* Always free skb and return success error code to prevent | |
662 | from sending L2CAP Disconnect over A2MP channel */ | |
663 | kfree_skb(skb); | |
664 | ||
665 | amp_mgr_put(mgr); | |
666 | ||
667 | return 0; | |
668 | } | |
669 | ||
46d5c908 AE |
670 | static void a2mp_chan_close_cb(struct l2cap_chan *chan) |
671 | { | |
4af66c69 | 672 | l2cap_chan_put(chan); |
46d5c908 AE |
673 | } |
674 | ||
53f52121 GP |
675 | static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state, |
676 | int err) | |
46d5c908 AE |
677 | { |
678 | struct amp_mgr *mgr = chan->data; | |
679 | ||
680 | if (!mgr) | |
681 | return; | |
682 | ||
683 | BT_DBG("chan %p state %s", chan, state_to_string(state)); | |
684 | ||
685 | chan->state = state; | |
686 | ||
687 | switch (state) { | |
688 | case BT_CLOSED: | |
689 | if (mgr) | |
690 | amp_mgr_put(mgr); | |
691 | break; | |
692 | } | |
693 | } | |
694 | ||
695 | static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan, | |
d9fbd02b | 696 | unsigned long hdr_len, |
46d5c908 AE |
697 | unsigned long len, int nb) |
698 | { | |
0753c182 GP |
699 | struct sk_buff *skb; |
700 | ||
d9fbd02b | 701 | skb = bt_skb_alloc(hdr_len + len, GFP_KERNEL); |
0753c182 GP |
702 | if (!skb) |
703 | return ERR_PTR(-ENOMEM); | |
704 | ||
705 | return skb; | |
46d5c908 AE |
706 | } |
707 | ||
67f86a45 | 708 | static const struct l2cap_ops a2mp_chan_ops = { |
466f8004 | 709 | .name = "L2CAP A2MP channel", |
6b44d9b8 | 710 | .recv = a2mp_chan_recv_cb, |
46d5c908 AE |
711 | .close = a2mp_chan_close_cb, |
712 | .state_change = a2mp_chan_state_change_cb, | |
713 | .alloc_skb = a2mp_chan_alloc_skb_cb, | |
714 | ||
715 | /* Not implemented for A2MP */ | |
7e1af8a3 GP |
716 | .new_connection = l2cap_chan_no_new_connection, |
717 | .teardown = l2cap_chan_no_teardown, | |
718 | .ready = l2cap_chan_no_ready, | |
2dc4e510 | 719 | .defer = l2cap_chan_no_defer, |
2ce5fb51 | 720 | .resume = l2cap_chan_no_resume, |
5ec1bbe5 | 721 | .set_shutdown = l2cap_chan_no_set_shutdown, |
8d836d71 | 722 | .get_sndtimeo = l2cap_chan_no_get_sndtimeo, |
0498878b | 723 | .memcpy_fromiovec = l2cap_chan_no_memcpy_fromiovec, |
466f8004 AE |
724 | }; |
725 | ||
93c3e8f5 | 726 | static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked) |
466f8004 AE |
727 | { |
728 | struct l2cap_chan *chan; | |
729 | int err; | |
730 | ||
731 | chan = l2cap_chan_create(); | |
732 | if (!chan) | |
733 | return NULL; | |
734 | ||
735 | BT_DBG("chan %p", chan); | |
736 | ||
2338a7e0 JH |
737 | chan->chan_type = L2CAP_CHAN_FIXED; |
738 | chan->scid = L2CAP_CID_A2MP; | |
739 | chan->dcid = L2CAP_CID_A2MP; | |
740 | chan->omtu = L2CAP_A2MP_DEFAULT_MTU; | |
741 | chan->imtu = L2CAP_A2MP_DEFAULT_MTU; | |
466f8004 AE |
742 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
743 | ||
744 | chan->ops = &a2mp_chan_ops; | |
745 | ||
746 | l2cap_chan_set_defaults(chan); | |
747 | chan->remote_max_tx = chan->max_tx; | |
748 | chan->remote_tx_win = chan->tx_win; | |
749 | ||
750 | chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
751 | chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
752 | ||
753 | skb_queue_head_init(&chan->tx_q); | |
754 | ||
755 | chan->mode = L2CAP_MODE_ERTM; | |
756 | ||
757 | err = l2cap_ertm_init(chan); | |
758 | if (err < 0) { | |
759 | l2cap_chan_del(chan, 0); | |
760 | return NULL; | |
761 | } | |
762 | ||
763 | chan->conf_state = 0; | |
764 | ||
93c3e8f5 AE |
765 | if (locked) |
766 | __l2cap_chan_add(conn, chan); | |
767 | else | |
768 | l2cap_chan_add(conn, chan); | |
466f8004 AE |
769 | |
770 | chan->remote_mps = chan->omtu; | |
771 | chan->mps = chan->omtu; | |
772 | ||
773 | chan->state = BT_CONNECTED; | |
774 | ||
775 | return chan; | |
776 | } | |
9740e49d AE |
777 | |
778 | /* AMP Manager functions */ | |
f706adfe | 779 | struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr) |
9740e49d | 780 | { |
a0dfe0ab | 781 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
782 | |
783 | kref_get(&mgr->kref); | |
f706adfe AE |
784 | |
785 | return mgr; | |
9740e49d AE |
786 | } |
787 | ||
788 | static void amp_mgr_destroy(struct kref *kref) | |
789 | { | |
790 | struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref); | |
791 | ||
792 | BT_DBG("mgr %p", mgr); | |
793 | ||
f97268fc AE |
794 | mutex_lock(&_mgr_list_lock); |
795 | list_del(&mgr->list); | |
796 | mutex_unlock(&_mgr_list_lock); | |
797 | ||
52c0d6e5 | 798 | amp_ctrl_list_flush(mgr); |
9740e49d AE |
799 | kfree(mgr); |
800 | } | |
801 | ||
802 | int amp_mgr_put(struct amp_mgr *mgr) | |
803 | { | |
a0dfe0ab | 804 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
805 | |
806 | return kref_put(&mgr->kref, &_mgr_destroy); | |
807 | } | |
808 | ||
93c3e8f5 | 809 | static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked) |
9740e49d AE |
810 | { |
811 | struct amp_mgr *mgr; | |
812 | struct l2cap_chan *chan; | |
813 | ||
814 | mgr = kzalloc(sizeof(*mgr), GFP_KERNEL); | |
815 | if (!mgr) | |
816 | return NULL; | |
817 | ||
818 | BT_DBG("conn %p mgr %p", conn, mgr); | |
819 | ||
820 | mgr->l2cap_conn = conn; | |
821 | ||
93c3e8f5 | 822 | chan = a2mp_chan_open(conn, locked); |
9740e49d AE |
823 | if (!chan) { |
824 | kfree(mgr); | |
825 | return NULL; | |
826 | } | |
827 | ||
828 | mgr->a2mp_chan = chan; | |
829 | chan->data = mgr; | |
830 | ||
831 | conn->hcon->amp_mgr = mgr; | |
832 | ||
833 | kref_init(&mgr->kref); | |
834 | ||
52c0d6e5 AE |
835 | /* Remote AMP ctrl list initialization */ |
836 | INIT_LIST_HEAD(&mgr->amp_ctrls); | |
837 | mutex_init(&mgr->amp_ctrls_lock); | |
838 | ||
f97268fc AE |
839 | mutex_lock(&_mgr_list_lock); |
840 | list_add(&mgr->list, &_mgr_list); | |
841 | mutex_unlock(&_mgr_list_lock); | |
842 | ||
9740e49d AE |
843 | return mgr; |
844 | } | |
97e8e89d AE |
845 | |
846 | struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn, | |
847 | struct sk_buff *skb) | |
848 | { | |
849 | struct amp_mgr *mgr; | |
850 | ||
07e307f8 JH |
851 | if (conn->hcon->type != ACL_LINK) |
852 | return NULL; | |
853 | ||
93c3e8f5 | 854 | mgr = amp_mgr_create(conn, false); |
97e8e89d AE |
855 | if (!mgr) { |
856 | BT_ERR("Could not create AMP manager"); | |
857 | return NULL; | |
858 | } | |
859 | ||
860 | BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan); | |
861 | ||
862 | return mgr->a2mp_chan; | |
863 | } | |
f97268fc AE |
864 | |
865 | struct amp_mgr *amp_mgr_lookup_by_state(u8 state) | |
866 | { | |
867 | struct amp_mgr *mgr; | |
868 | ||
869 | mutex_lock(&_mgr_list_lock); | |
870 | list_for_each_entry(mgr, &_mgr_list, list) { | |
cb6801c6 | 871 | if (test_and_clear_bit(state, &mgr->state)) { |
f97268fc AE |
872 | amp_mgr_get(mgr); |
873 | mutex_unlock(&_mgr_list_lock); | |
874 | return mgr; | |
875 | } | |
876 | } | |
877 | mutex_unlock(&_mgr_list_lock); | |
878 | ||
879 | return NULL; | |
880 | } | |
8e2a0d92 AE |
881 | |
882 | void a2mp_send_getinfo_rsp(struct hci_dev *hdev) | |
883 | { | |
884 | struct amp_mgr *mgr; | |
885 | struct a2mp_info_rsp rsp; | |
886 | ||
887 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO); | |
888 | if (!mgr) | |
889 | return; | |
890 | ||
891 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
892 | ||
893 | rsp.id = hdev->id; | |
894 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
895 | ||
ece69126 | 896 | if (hdev->amp_type != AMP_TYPE_BREDR) { |
8e2a0d92 AE |
897 | rsp.status = 0; |
898 | rsp.total_bw = cpu_to_le32(hdev->amp_total_bw); | |
899 | rsp.max_bw = cpu_to_le32(hdev->amp_max_bw); | |
900 | rsp.min_latency = cpu_to_le32(hdev->amp_min_latency); | |
901 | rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap); | |
902 | rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size); | |
903 | } | |
904 | ||
905 | a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp); | |
906 | amp_mgr_put(mgr); | |
907 | } | |
903e4541 AE |
908 | |
909 | void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status) | |
910 | { | |
911 | struct amp_mgr *mgr; | |
912 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
913 | struct a2mp_amp_assoc_rsp *rsp; | |
914 | size_t len; | |
915 | ||
916 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
917 | if (!mgr) | |
918 | return; | |
919 | ||
920 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
921 | ||
922 | len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len; | |
923 | rsp = kzalloc(len, GFP_KERNEL); | |
924 | if (!rsp) { | |
925 | amp_mgr_put(mgr); | |
926 | return; | |
927 | } | |
928 | ||
929 | rsp->id = hdev->id; | |
930 | ||
931 | if (status) { | |
932 | rsp->status = A2MP_STATUS_INVALID_CTRL_ID; | |
933 | } else { | |
934 | rsp->status = A2MP_STATUS_SUCCESS; | |
935 | memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len); | |
936 | } | |
937 | ||
938 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp); | |
939 | amp_mgr_put(mgr); | |
940 | kfree(rsp); | |
941 | } | |
93c3e8f5 | 942 | |
9495b2ee AE |
943 | void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status) |
944 | { | |
945 | struct amp_mgr *mgr; | |
946 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
947 | struct a2mp_physlink_req *req; | |
948 | struct l2cap_chan *bredr_chan; | |
949 | size_t len; | |
950 | ||
951 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL); | |
952 | if (!mgr) | |
953 | return; | |
954 | ||
955 | len = sizeof(*req) + loc_assoc->len; | |
956 | ||
957 | BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len); | |
958 | ||
959 | req = kzalloc(len, GFP_KERNEL); | |
960 | if (!req) { | |
961 | amp_mgr_put(mgr); | |
962 | return; | |
963 | } | |
964 | ||
965 | bredr_chan = mgr->bredr_chan; | |
966 | if (!bredr_chan) | |
967 | goto clean; | |
968 | ||
969 | req->local_id = hdev->id; | |
fffadc08 | 970 | req->remote_id = bredr_chan->remote_amp_id; |
9495b2ee AE |
971 | memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len); |
972 | ||
973 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req); | |
974 | ||
975 | clean: | |
976 | amp_mgr_put(mgr); | |
977 | kfree(req); | |
978 | } | |
979 | ||
8e05e3ba AE |
980 | void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status) |
981 | { | |
982 | struct amp_mgr *mgr; | |
983 | struct a2mp_physlink_rsp rsp; | |
984 | struct hci_conn *hs_hcon; | |
985 | ||
986 | mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC); | |
987 | if (!mgr) | |
988 | return; | |
989 | ||
990 | hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT); | |
991 | if (!hs_hcon) { | |
992 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
993 | } else { | |
994 | rsp.remote_id = hs_hcon->remote_id; | |
995 | rsp.status = A2MP_STATUS_SUCCESS; | |
996 | } | |
997 | ||
998 | BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon, | |
999 | status); | |
1000 | ||
1001 | rsp.local_id = hdev->id; | |
1002 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp); | |
1003 | amp_mgr_put(mgr); | |
1004 | } | |
1005 | ||
93c3e8f5 AE |
1006 | void a2mp_discover_amp(struct l2cap_chan *chan) |
1007 | { | |
1008 | struct l2cap_conn *conn = chan->conn; | |
1009 | struct amp_mgr *mgr = conn->hcon->amp_mgr; | |
1010 | struct a2mp_discov_req req; | |
1011 | ||
1012 | BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr); | |
1013 | ||
1014 | if (!mgr) { | |
1015 | mgr = amp_mgr_create(conn, true); | |
1016 | if (!mgr) | |
1017 | return; | |
1018 | } | |
1019 | ||
1020 | mgr->bredr_chan = chan; | |
1021 | ||
1022 | req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); | |
1023 | req.ext_feat = 0; | |
1024 | a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req); | |
1025 | } |