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Commit | Line | Data |
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97fb5e8d | 1 | // SPDX-License-Identifier: GPL-2.0-only |
466f8004 AE |
2 | /* |
3 | Copyright (c) 2010,2011 Code Aurora Forum. All rights reserved. | |
4 | Copyright (c) 2011,2012 Intel Corp. | |
5 | ||
466f8004 AE |
6 | */ |
7 | ||
8 | #include <net/bluetooth/bluetooth.h> | |
9 | #include <net/bluetooth/hci_core.h> | |
10 | #include <net/bluetooth/l2cap.h> | |
7ef9fbf0 | 11 | |
83927882 | 12 | #include "hci_request.h" |
7024728e | 13 | #include "a2mp.h" |
7ef9fbf0 | 14 | #include "amp.h" |
466f8004 | 15 | |
055540a1 MH |
16 | #define A2MP_FEAT_EXT 0x8000 |
17 | ||
f97268fc | 18 | /* Global AMP Manager list */ |
59d4d086 MH |
19 | static LIST_HEAD(amp_mgr_list); |
20 | static DEFINE_MUTEX(amp_mgr_list_lock); | |
f97268fc | 21 | |
f6d3c6e7 AE |
22 | /* A2MP build & send command helper functions */ |
23 | static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data) | |
24 | { | |
25 | struct a2mp_cmd *cmd; | |
26 | int plen; | |
27 | ||
28 | plen = sizeof(*cmd) + len; | |
29 | cmd = kzalloc(plen, GFP_KERNEL); | |
30 | if (!cmd) | |
31 | return NULL; | |
32 | ||
33 | cmd->code = code; | |
34 | cmd->ident = ident; | |
35 | cmd->len = cpu_to_le16(len); | |
36 | ||
37 | memcpy(cmd->data, data, len); | |
38 | ||
39 | return cmd; | |
40 | } | |
41 | ||
bc333cc4 | 42 | static void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data) |
f6d3c6e7 AE |
43 | { |
44 | struct l2cap_chan *chan = mgr->a2mp_chan; | |
45 | struct a2mp_cmd *cmd; | |
46 | u16 total_len = len + sizeof(*cmd); | |
47 | struct kvec iv; | |
48 | struct msghdr msg; | |
49 | ||
50 | cmd = __a2mp_build(code, ident, len, data); | |
51 | if (!cmd) | |
52 | return; | |
53 | ||
54 | iv.iov_base = cmd; | |
55 | iv.iov_len = total_len; | |
56 | ||
57 | memset(&msg, 0, sizeof(msg)); | |
58 | ||
aa563d7b | 59 | iov_iter_kvec(&msg.msg_iter, WRITE, &iv, 1, total_len); |
f6d3c6e7 | 60 | |
8d46321c | 61 | l2cap_chan_send(chan, &msg, total_len); |
f6d3c6e7 AE |
62 | |
63 | kfree(cmd); | |
64 | } | |
65 | ||
87e2a020 | 66 | static u8 __next_ident(struct amp_mgr *mgr) |
aa09537d AE |
67 | { |
68 | if (++mgr->ident == 0) | |
69 | mgr->ident = 1; | |
70 | ||
71 | return mgr->ident; | |
72 | } | |
73 | ||
469cd4c5 MH |
74 | static struct amp_mgr *amp_mgr_lookup_by_state(u8 state) |
75 | { | |
76 | struct amp_mgr *mgr; | |
77 | ||
78 | mutex_lock(&_mgr_list_lock); | |
79 | list_for_each_entry(mgr, &_mgr_list, list) { | |
80 | if (test_and_clear_bit(state, &mgr->state)) { | |
81 | amp_mgr_get(mgr); | |
82 | mutex_unlock(&_mgr_list_lock); | |
83 | return mgr; | |
84 | } | |
85 | } | |
86 | mutex_unlock(&_mgr_list_lock); | |
87 | ||
88 | return NULL; | |
89 | } | |
90 | ||
8598d064 | 91 | /* hci_dev_list shall be locked */ |
23f0cb41 | 92 | static void __a2mp_add_cl(struct amp_mgr *mgr, struct a2mp_cl *cl) |
8598d064 | 93 | { |
8598d064 | 94 | struct hci_dev *hdev; |
e8803534 | 95 | int i = 1; |
8598d064 | 96 | |
346e7099 MH |
97 | cl[0].id = AMP_ID_BREDR; |
98 | cl[0].type = AMP_TYPE_BREDR; | |
99 | cl[0].status = AMP_STATUS_BLUETOOTH_ONLY; | |
8598d064 AE |
100 | |
101 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
e8803534 MH |
102 | if (hdev->dev_type == HCI_AMP) { |
103 | cl[i].id = hdev->id; | |
104 | cl[i].type = hdev->amp_type; | |
cd0a85c2 MH |
105 | if (test_bit(HCI_UP, &hdev->flags)) |
106 | cl[i].status = hdev->amp_status; | |
107 | else | |
108 | cl[i].status = AMP_STATUS_POWERED_DOWN; | |
e8803534 MH |
109 | i++; |
110 | } | |
8598d064 AE |
111 | } |
112 | } | |
113 | ||
21dbd2ce AE |
114 | /* Processing A2MP messages */ |
115 | static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb, | |
116 | struct a2mp_cmd *hdr) | |
117 | { | |
118 | struct a2mp_cmd_rej *rej = (void *) skb->data; | |
119 | ||
120 | if (le16_to_cpu(hdr->len) < sizeof(*rej)) | |
121 | return -EINVAL; | |
122 | ||
fad48d84 | 123 | BT_DBG("ident %u reason %d", hdr->ident, le16_to_cpu(rej->reason)); |
21dbd2ce AE |
124 | |
125 | skb_pull(skb, sizeof(*rej)); | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
8598d064 AE |
130 | static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb, |
131 | struct a2mp_cmd *hdr) | |
132 | { | |
133 | struct a2mp_discov_req *req = (void *) skb->data; | |
134 | u16 len = le16_to_cpu(hdr->len); | |
135 | struct a2mp_discov_rsp *rsp; | |
136 | u16 ext_feat; | |
137 | u8 num_ctrl; | |
f822c411 | 138 | struct hci_dev *hdev; |
8598d064 AE |
139 | |
140 | if (len < sizeof(*req)) | |
141 | return -EINVAL; | |
142 | ||
143 | skb_pull(skb, sizeof(*req)); | |
144 | ||
145 | ext_feat = le16_to_cpu(req->ext_feat); | |
146 | ||
147 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat); | |
148 | ||
149 | /* check that packet is not broken for now */ | |
150 | while (ext_feat & A2MP_FEAT_EXT) { | |
151 | if (len < sizeof(ext_feat)) | |
152 | return -EINVAL; | |
153 | ||
154 | ext_feat = get_unaligned_le16(skb->data); | |
155 | BT_DBG("efm 0x%4.4x", ext_feat); | |
156 | len -= sizeof(ext_feat); | |
157 | skb_pull(skb, sizeof(ext_feat)); | |
158 | } | |
159 | ||
160 | read_lock(&hci_dev_list_lock); | |
161 | ||
f822c411 MH |
162 | /* at minimum the BR/EDR needs to be listed */ |
163 | num_ctrl = 1; | |
164 | ||
165 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
166 | if (hdev->dev_type == HCI_AMP) | |
167 | num_ctrl++; | |
168 | } | |
169 | ||
3c97ce1f | 170 | len = struct_size(rsp, cl, num_ctrl); |
8598d064 AE |
171 | rsp = kmalloc(len, GFP_ATOMIC); |
172 | if (!rsp) { | |
173 | read_unlock(&hci_dev_list_lock); | |
174 | return -ENOMEM; | |
175 | } | |
176 | ||
dcf4adbf | 177 | rsp->mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); |
8598d064 AE |
178 | rsp->ext_feat = 0; |
179 | ||
23f0cb41 | 180 | __a2mp_add_cl(mgr, rsp->cl); |
8598d064 AE |
181 | |
182 | read_unlock(&hci_dev_list_lock); | |
183 | ||
184 | a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp); | |
185 | ||
186 | kfree(rsp); | |
187 | return 0; | |
188 | } | |
189 | ||
aa09537d AE |
190 | static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
191 | struct a2mp_cmd *hdr) | |
192 | { | |
193 | struct a2mp_discov_rsp *rsp = (void *) skb->data; | |
194 | u16 len = le16_to_cpu(hdr->len); | |
195 | struct a2mp_cl *cl; | |
196 | u16 ext_feat; | |
2766be48 | 197 | bool found = false; |
aa09537d AE |
198 | |
199 | if (len < sizeof(*rsp)) | |
200 | return -EINVAL; | |
201 | ||
202 | len -= sizeof(*rsp); | |
203 | skb_pull(skb, sizeof(*rsp)); | |
204 | ||
205 | ext_feat = le16_to_cpu(rsp->ext_feat); | |
206 | ||
207 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat); | |
208 | ||
209 | /* check that packet is not broken for now */ | |
210 | while (ext_feat & A2MP_FEAT_EXT) { | |
211 | if (len < sizeof(ext_feat)) | |
212 | return -EINVAL; | |
213 | ||
214 | ext_feat = get_unaligned_le16(skb->data); | |
215 | BT_DBG("efm 0x%4.4x", ext_feat); | |
216 | len -= sizeof(ext_feat); | |
217 | skb_pull(skb, sizeof(ext_feat)); | |
218 | } | |
219 | ||
220 | cl = (void *) skb->data; | |
221 | while (len >= sizeof(*cl)) { | |
fad48d84 | 222 | BT_DBG("Remote AMP id %u type %u status %u", cl->id, cl->type, |
aa09537d AE |
223 | cl->status); |
224 | ||
a646bd81 | 225 | if (cl->id != AMP_ID_BREDR && cl->type != AMP_TYPE_BREDR) { |
aa09537d AE |
226 | struct a2mp_info_req req; |
227 | ||
2766be48 | 228 | found = true; |
eddb7732 LAD |
229 | |
230 | memset(&req, 0, sizeof(req)); | |
231 | ||
aa09537d AE |
232 | req.id = cl->id; |
233 | a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr), | |
234 | sizeof(req), &req); | |
235 | } | |
236 | ||
237 | len -= sizeof(*cl); | |
af72868b | 238 | cl = skb_pull(skb, sizeof(*cl)); |
aa09537d AE |
239 | } |
240 | ||
2766be48 AE |
241 | /* Fall back to L2CAP init sequence */ |
242 | if (!found) { | |
243 | struct l2cap_conn *conn = mgr->l2cap_conn; | |
244 | struct l2cap_chan *chan; | |
245 | ||
246 | mutex_lock(&conn->chan_lock); | |
247 | ||
248 | list_for_each_entry(chan, &conn->chan_l, list) { | |
249 | ||
250 | BT_DBG("chan %p state %s", chan, | |
251 | state_to_string(chan->state)); | |
252 | ||
2338a7e0 | 253 | if (chan->scid == L2CAP_CID_A2MP) |
2766be48 AE |
254 | continue; |
255 | ||
256 | l2cap_chan_lock(chan); | |
257 | ||
258 | if (chan->state == BT_CONNECT) | |
259 | l2cap_send_conn_req(chan); | |
260 | ||
261 | l2cap_chan_unlock(chan); | |
262 | } | |
263 | ||
264 | mutex_unlock(&conn->chan_lock); | |
265 | } | |
266 | ||
aa09537d AE |
267 | return 0; |
268 | } | |
269 | ||
329d81af AE |
270 | static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb, |
271 | struct a2mp_cmd *hdr) | |
272 | { | |
273 | struct a2mp_cl *cl = (void *) skb->data; | |
274 | ||
275 | while (skb->len >= sizeof(*cl)) { | |
fad48d84 | 276 | BT_DBG("Controller id %u type %u status %u", cl->id, cl->type, |
329d81af | 277 | cl->status); |
af72868b | 278 | cl = skb_pull(skb, sizeof(*cl)); |
329d81af AE |
279 | } |
280 | ||
281 | /* TODO send A2MP_CHANGE_RSP */ | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
83927882 AW |
286 | static void read_local_amp_info_complete(struct hci_dev *hdev, u8 status, |
287 | u16 opcode) | |
288 | { | |
289 | BT_DBG("%s status 0x%2.2x", hdev->name, status); | |
290 | ||
291 | a2mp_send_getinfo_rsp(hdev); | |
292 | } | |
293 | ||
47f2d97d AE |
294 | static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb, |
295 | struct a2mp_cmd *hdr) | |
296 | { | |
297 | struct a2mp_info_req *req = (void *) skb->data; | |
47f2d97d | 298 | struct hci_dev *hdev; |
83927882 AW |
299 | struct hci_request hreq; |
300 | int err = 0; | |
47f2d97d AE |
301 | |
302 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
303 | return -EINVAL; | |
304 | ||
fad48d84 | 305 | BT_DBG("id %u", req->id); |
47f2d97d | 306 | |
47f2d97d | 307 | hdev = hci_dev_get(req->id); |
bc8dce4f | 308 | if (!hdev || hdev->dev_type != HCI_AMP) { |
8e2a0d92 AE |
309 | struct a2mp_info_rsp rsp; |
310 | ||
eddb7732 LAD |
311 | memset(&rsp, 0, sizeof(rsp)); |
312 | ||
8e2a0d92 AE |
313 | rsp.id = req->id; |
314 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
315 | ||
316 | a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp), | |
317 | &rsp); | |
47f2d97d | 318 | |
bc8dce4f | 319 | goto done; |
8e2a0d92 | 320 | } |
47f2d97d | 321 | |
cb6801c6 | 322 | set_bit(READ_LOC_AMP_INFO, &mgr->state); |
83927882 AW |
323 | hci_req_init(&hreq, hdev); |
324 | hci_req_add(&hreq, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL); | |
325 | err = hci_req_run(&hreq, read_local_amp_info_complete); | |
326 | if (err < 0) | |
327 | a2mp_send_getinfo_rsp(hdev); | |
bc8dce4f AE |
328 | |
329 | done: | |
330 | if (hdev) | |
331 | hci_dev_put(hdev); | |
47f2d97d AE |
332 | |
333 | skb_pull(skb, sizeof(*req)); | |
334 | return 0; | |
335 | } | |
336 | ||
0d868de9 AE |
337 | static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
338 | struct a2mp_cmd *hdr) | |
339 | { | |
340 | struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data; | |
341 | struct a2mp_amp_assoc_req req; | |
342 | struct amp_ctrl *ctrl; | |
343 | ||
344 | if (le16_to_cpu(hdr->len) < sizeof(*rsp)) | |
345 | return -EINVAL; | |
346 | ||
fad48d84 | 347 | BT_DBG("id %u status 0x%2.2x", rsp->id, rsp->status); |
0d868de9 AE |
348 | |
349 | if (rsp->status) | |
350 | return -EINVAL; | |
351 | ||
fa4ebc66 | 352 | ctrl = amp_ctrl_add(mgr, rsp->id); |
0d868de9 AE |
353 | if (!ctrl) |
354 | return -ENOMEM; | |
355 | ||
eddb7732 LAD |
356 | memset(&req, 0, sizeof(req)); |
357 | ||
0d868de9 AE |
358 | req.id = rsp->id; |
359 | a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req), | |
360 | &req); | |
361 | ||
362 | skb_pull(skb, sizeof(*rsp)); | |
363 | return 0; | |
364 | } | |
365 | ||
a28381dc AE |
366 | static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb, |
367 | struct a2mp_cmd *hdr) | |
368 | { | |
369 | struct a2mp_amp_assoc_req *req = (void *) skb->data; | |
370 | struct hci_dev *hdev; | |
903e4541 | 371 | struct amp_mgr *tmp; |
a28381dc AE |
372 | |
373 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
374 | return -EINVAL; | |
375 | ||
fad48d84 | 376 | BT_DBG("id %u", req->id); |
a28381dc | 377 | |
903e4541 AE |
378 | /* Make sure that other request is not processed */ |
379 | tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
380 | ||
a28381dc | 381 | hdev = hci_dev_get(req->id); |
ece69126 | 382 | if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) { |
a28381dc | 383 | struct a2mp_amp_assoc_rsp rsp; |
903e4541 | 384 | |
eddb7732 | 385 | memset(&rsp, 0, sizeof(rsp)); |
a5687c64 | 386 | rsp.id = req->id; |
eddb7732 | 387 | |
903e4541 AE |
388 | if (tmp) { |
389 | rsp.status = A2MP_STATUS_COLLISION_OCCURED; | |
390 | amp_mgr_put(tmp); | |
391 | } else { | |
392 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
393 | } | |
a28381dc AE |
394 | |
395 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp), | |
396 | &rsp); | |
903e4541 AE |
397 | |
398 | goto done; | |
a28381dc AE |
399 | } |
400 | ||
903e4541 | 401 | amp_read_loc_assoc(hdev, mgr); |
a28381dc | 402 | |
903e4541 | 403 | done: |
a28381dc AE |
404 | if (hdev) |
405 | hci_dev_put(hdev); | |
406 | ||
407 | skb_pull(skb, sizeof(*req)); | |
408 | return 0; | |
409 | } | |
410 | ||
9a5e94db AE |
411 | static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
412 | struct a2mp_cmd *hdr) | |
413 | { | |
414 | struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data; | |
415 | u16 len = le16_to_cpu(hdr->len); | |
416 | struct hci_dev *hdev; | |
417 | struct amp_ctrl *ctrl; | |
418 | struct hci_conn *hcon; | |
13465c0a | 419 | size_t assoc_len; |
9a5e94db AE |
420 | |
421 | if (len < sizeof(*rsp)) | |
422 | return -EINVAL; | |
423 | ||
13465c0a AE |
424 | assoc_len = len - sizeof(*rsp); |
425 | ||
fad48d84 | 426 | BT_DBG("id %u status 0x%2.2x assoc len %zu", rsp->id, rsp->status, |
13465c0a | 427 | assoc_len); |
9a5e94db AE |
428 | |
429 | if (rsp->status) | |
430 | return -EINVAL; | |
431 | ||
432 | /* Save remote ASSOC data */ | |
433 | ctrl = amp_ctrl_lookup(mgr, rsp->id); | |
434 | if (ctrl) { | |
13465c0a | 435 | u8 *assoc; |
9a5e94db | 436 | |
5ae327f0 | 437 | assoc = kmemdup(rsp->amp_assoc, assoc_len, GFP_KERNEL); |
9a5e94db AE |
438 | if (!assoc) { |
439 | amp_ctrl_put(ctrl); | |
440 | return -ENOMEM; | |
441 | } | |
442 | ||
9a5e94db AE |
443 | ctrl->assoc = assoc; |
444 | ctrl->assoc_len = assoc_len; | |
445 | ctrl->assoc_rem_len = assoc_len; | |
446 | ctrl->assoc_len_so_far = 0; | |
447 | ||
448 | amp_ctrl_put(ctrl); | |
449 | } | |
450 | ||
451 | /* Create Phys Link */ | |
452 | hdev = hci_dev_get(rsp->id); | |
453 | if (!hdev) | |
454 | return -EINVAL; | |
455 | ||
a0c234fe | 456 | hcon = phylink_add(hdev, mgr, rsp->id, true); |
9a5e94db AE |
457 | if (!hcon) |
458 | goto done; | |
459 | ||
fad48d84 | 460 | BT_DBG("Created hcon %p: loc:%u -> rem:%u", hcon, hdev->id, rsp->id); |
9a5e94db | 461 | |
fffadc08 | 462 | mgr->bredr_chan->remote_amp_id = rsp->id; |
9495b2ee | 463 | |
a02226d6 AE |
464 | amp_create_phylink(hdev, mgr, hcon); |
465 | ||
9a5e94db AE |
466 | done: |
467 | hci_dev_put(hdev); | |
468 | skb_pull(skb, len); | |
469 | return 0; | |
470 | } | |
471 | ||
e072f5da AE |
472 | static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
473 | struct a2mp_cmd *hdr) | |
474 | { | |
475 | struct a2mp_physlink_req *req = (void *) skb->data; | |
e072f5da AE |
476 | struct a2mp_physlink_rsp rsp; |
477 | struct hci_dev *hdev; | |
cb8488c0 | 478 | struct hci_conn *hcon; |
0b26ab9d | 479 | struct amp_ctrl *ctrl; |
e072f5da AE |
480 | |
481 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
482 | return -EINVAL; | |
483 | ||
fad48d84 | 484 | BT_DBG("local_id %u, remote_id %u", req->local_id, req->remote_id); |
e072f5da | 485 | |
eddb7732 LAD |
486 | memset(&rsp, 0, sizeof(rsp)); |
487 | ||
e072f5da AE |
488 | rsp.local_id = req->remote_id; |
489 | rsp.remote_id = req->local_id; | |
490 | ||
491 | hdev = hci_dev_get(req->remote_id); | |
ece69126 | 492 | if (!hdev || hdev->amp_type == AMP_TYPE_BREDR) { |
e072f5da AE |
493 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; |
494 | goto send_rsp; | |
495 | } | |
496 | ||
0b26ab9d AE |
497 | ctrl = amp_ctrl_lookup(mgr, rsp.remote_id); |
498 | if (!ctrl) { | |
fa4ebc66 | 499 | ctrl = amp_ctrl_add(mgr, rsp.remote_id); |
0b26ab9d AE |
500 | if (ctrl) { |
501 | amp_ctrl_get(ctrl); | |
502 | } else { | |
503 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
504 | goto send_rsp; | |
505 | } | |
506 | } | |
507 | ||
508 | if (ctrl) { | |
13465c0a AE |
509 | size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req); |
510 | u8 *assoc; | |
0b26ab9d | 511 | |
5ae327f0 | 512 | assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL); |
0b26ab9d AE |
513 | if (!assoc) { |
514 | amp_ctrl_put(ctrl); | |
5a3ef03a | 515 | hci_dev_put(hdev); |
0b26ab9d AE |
516 | return -ENOMEM; |
517 | } | |
518 | ||
0b26ab9d AE |
519 | ctrl->assoc = assoc; |
520 | ctrl->assoc_len = assoc_len; | |
521 | ctrl->assoc_rem_len = assoc_len; | |
522 | ctrl->assoc_len_so_far = 0; | |
523 | ||
524 | amp_ctrl_put(ctrl); | |
525 | } | |
526 | ||
a0c234fe | 527 | hcon = phylink_add(hdev, mgr, req->local_id, false); |
cb8488c0 | 528 | if (hcon) { |
dffa3871 | 529 | amp_accept_phylink(hdev, mgr, hcon); |
cb8488c0 AE |
530 | rsp.status = A2MP_STATUS_SUCCESS; |
531 | } else { | |
532 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
533 | } | |
e072f5da AE |
534 | |
535 | send_rsp: | |
536 | if (hdev) | |
537 | hci_dev_put(hdev); | |
538 | ||
8e05e3ba AE |
539 | /* Reply error now and success after HCI Write Remote AMP Assoc |
540 | command complete with success status | |
541 | */ | |
542 | if (rsp.status != A2MP_STATUS_SUCCESS) { | |
543 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, | |
544 | sizeof(rsp), &rsp); | |
545 | } else { | |
cb6801c6 | 546 | set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state); |
8e05e3ba AE |
547 | mgr->ident = hdr->ident; |
548 | } | |
e072f5da AE |
549 | |
550 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
551 | return 0; | |
552 | } | |
553 | ||
6113f84f AE |
554 | static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
555 | struct a2mp_cmd *hdr) | |
556 | { | |
557 | struct a2mp_physlink_req *req = (void *) skb->data; | |
558 | struct a2mp_physlink_rsp rsp; | |
559 | struct hci_dev *hdev; | |
cb8488c0 | 560 | struct hci_conn *hcon; |
6113f84f AE |
561 | |
562 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
563 | return -EINVAL; | |
564 | ||
fad48d84 | 565 | BT_DBG("local_id %u remote_id %u", req->local_id, req->remote_id); |
6113f84f | 566 | |
eddb7732 LAD |
567 | memset(&rsp, 0, sizeof(rsp)); |
568 | ||
6113f84f AE |
569 | rsp.local_id = req->remote_id; |
570 | rsp.remote_id = req->local_id; | |
571 | rsp.status = A2MP_STATUS_SUCCESS; | |
572 | ||
cb8488c0 | 573 | hdev = hci_dev_get(req->remote_id); |
6113f84f AE |
574 | if (!hdev) { |
575 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
576 | goto send_rsp; | |
577 | } | |
578 | ||
bdc8ead2 MH |
579 | hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, |
580 | &mgr->l2cap_conn->hcon->dst); | |
cb8488c0 | 581 | if (!hcon) { |
2064ee33 | 582 | bt_dev_err(hdev, "no phys link exist"); |
cb8488c0 AE |
583 | rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS; |
584 | goto clean; | |
585 | } | |
586 | ||
6113f84f AE |
587 | /* TODO Disconnect Phys Link here */ |
588 | ||
cb8488c0 | 589 | clean: |
6113f84f AE |
590 | hci_dev_put(hdev); |
591 | ||
592 | send_rsp: | |
593 | a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp); | |
594 | ||
595 | skb_pull(skb, sizeof(*req)); | |
596 | return 0; | |
597 | } | |
598 | ||
f6410a84 AE |
599 | static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
600 | struct a2mp_cmd *hdr) | |
601 | { | |
fad48d84 | 602 | BT_DBG("ident %u code 0x%2.2x", hdr->ident, hdr->code); |
f6410a84 AE |
603 | |
604 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
605 | return 0; | |
606 | } | |
607 | ||
6b44d9b8 AE |
608 | /* Handle A2MP signalling */ |
609 | static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) | |
610 | { | |
d9fc1d54 | 611 | struct a2mp_cmd *hdr; |
6b44d9b8 AE |
612 | struct amp_mgr *mgr = chan->data; |
613 | int err = 0; | |
614 | ||
615 | amp_mgr_get(mgr); | |
616 | ||
617 | while (skb->len >= sizeof(*hdr)) { | |
d9fc1d54 AE |
618 | u16 len; |
619 | ||
620 | hdr = (void *) skb->data; | |
621 | len = le16_to_cpu(hdr->len); | |
6b44d9b8 | 622 | |
fad48d84 | 623 | BT_DBG("code 0x%2.2x id %u len %u", hdr->code, hdr->ident, len); |
6b44d9b8 AE |
624 | |
625 | skb_pull(skb, sizeof(*hdr)); | |
626 | ||
627 | if (len > skb->len || !hdr->ident) { | |
628 | err = -EINVAL; | |
629 | break; | |
630 | } | |
631 | ||
632 | mgr->ident = hdr->ident; | |
633 | ||
634 | switch (hdr->code) { | |
635 | case A2MP_COMMAND_REJ: | |
21dbd2ce AE |
636 | a2mp_command_rej(mgr, skb, hdr); |
637 | break; | |
638 | ||
6b44d9b8 | 639 | case A2MP_DISCOVER_REQ: |
8598d064 AE |
640 | err = a2mp_discover_req(mgr, skb, hdr); |
641 | break; | |
642 | ||
6b44d9b8 | 643 | case A2MP_CHANGE_NOTIFY: |
329d81af AE |
644 | err = a2mp_change_notify(mgr, skb, hdr); |
645 | break; | |
646 | ||
6b44d9b8 | 647 | case A2MP_GETINFO_REQ: |
47f2d97d AE |
648 | err = a2mp_getinfo_req(mgr, skb, hdr); |
649 | break; | |
650 | ||
6b44d9b8 | 651 | case A2MP_GETAMPASSOC_REQ: |
a28381dc AE |
652 | err = a2mp_getampassoc_req(mgr, skb, hdr); |
653 | break; | |
654 | ||
6b44d9b8 | 655 | case A2MP_CREATEPHYSLINK_REQ: |
e072f5da AE |
656 | err = a2mp_createphyslink_req(mgr, skb, hdr); |
657 | break; | |
658 | ||
6b44d9b8 | 659 | case A2MP_DISCONNPHYSLINK_REQ: |
6113f84f AE |
660 | err = a2mp_discphyslink_req(mgr, skb, hdr); |
661 | break; | |
662 | ||
6b44d9b8 | 663 | case A2MP_DISCOVER_RSP: |
aa09537d AE |
664 | err = a2mp_discover_rsp(mgr, skb, hdr); |
665 | break; | |
666 | ||
6b44d9b8 | 667 | case A2MP_GETINFO_RSP: |
0d868de9 AE |
668 | err = a2mp_getinfo_rsp(mgr, skb, hdr); |
669 | break; | |
670 | ||
6b44d9b8 | 671 | case A2MP_GETAMPASSOC_RSP: |
9a5e94db AE |
672 | err = a2mp_getampassoc_rsp(mgr, skb, hdr); |
673 | break; | |
674 | ||
675 | case A2MP_CHANGE_RSP: | |
6b44d9b8 AE |
676 | case A2MP_CREATEPHYSLINK_RSP: |
677 | case A2MP_DISCONNPHYSLINK_RSP: | |
f6410a84 AE |
678 | err = a2mp_cmd_rsp(mgr, skb, hdr); |
679 | break; | |
680 | ||
6b44d9b8 AE |
681 | default: |
682 | BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code); | |
683 | err = -EINVAL; | |
684 | break; | |
685 | } | |
686 | } | |
687 | ||
688 | if (err) { | |
689 | struct a2mp_cmd_rej rej; | |
d9fc1d54 | 690 | |
eddb7732 LAD |
691 | memset(&rej, 0, sizeof(rej)); |
692 | ||
dcf4adbf | 693 | rej.reason = cpu_to_le16(0); |
d9fc1d54 | 694 | hdr = (void *) skb->data; |
6b44d9b8 AE |
695 | |
696 | BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err); | |
697 | ||
698 | a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej), | |
699 | &rej); | |
700 | } | |
701 | ||
702 | /* Always free skb and return success error code to prevent | |
703 | from sending L2CAP Disconnect over A2MP channel */ | |
704 | kfree_skb(skb); | |
705 | ||
706 | amp_mgr_put(mgr); | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
46d5c908 AE |
711 | static void a2mp_chan_close_cb(struct l2cap_chan *chan) |
712 | { | |
4af66c69 | 713 | l2cap_chan_put(chan); |
46d5c908 AE |
714 | } |
715 | ||
53f52121 GP |
716 | static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state, |
717 | int err) | |
46d5c908 AE |
718 | { |
719 | struct amp_mgr *mgr = chan->data; | |
720 | ||
721 | if (!mgr) | |
722 | return; | |
723 | ||
724 | BT_DBG("chan %p state %s", chan, state_to_string(state)); | |
725 | ||
726 | chan->state = state; | |
727 | ||
728 | switch (state) { | |
729 | case BT_CLOSED: | |
730 | if (mgr) | |
731 | amp_mgr_put(mgr); | |
732 | break; | |
733 | } | |
734 | } | |
735 | ||
736 | static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan, | |
d9fbd02b | 737 | unsigned long hdr_len, |
46d5c908 AE |
738 | unsigned long len, int nb) |
739 | { | |
0753c182 GP |
740 | struct sk_buff *skb; |
741 | ||
d9fbd02b | 742 | skb = bt_skb_alloc(hdr_len + len, GFP_KERNEL); |
0753c182 GP |
743 | if (!skb) |
744 | return ERR_PTR(-ENOMEM); | |
745 | ||
746 | return skb; | |
46d5c908 AE |
747 | } |
748 | ||
67f86a45 | 749 | static const struct l2cap_ops a2mp_chan_ops = { |
466f8004 | 750 | .name = "L2CAP A2MP channel", |
6b44d9b8 | 751 | .recv = a2mp_chan_recv_cb, |
46d5c908 AE |
752 | .close = a2mp_chan_close_cb, |
753 | .state_change = a2mp_chan_state_change_cb, | |
754 | .alloc_skb = a2mp_chan_alloc_skb_cb, | |
755 | ||
756 | /* Not implemented for A2MP */ | |
7e1af8a3 GP |
757 | .new_connection = l2cap_chan_no_new_connection, |
758 | .teardown = l2cap_chan_no_teardown, | |
759 | .ready = l2cap_chan_no_ready, | |
2dc4e510 | 760 | .defer = l2cap_chan_no_defer, |
2ce5fb51 | 761 | .resume = l2cap_chan_no_resume, |
5ec1bbe5 | 762 | .set_shutdown = l2cap_chan_no_set_shutdown, |
8d836d71 | 763 | .get_sndtimeo = l2cap_chan_no_get_sndtimeo, |
466f8004 AE |
764 | }; |
765 | ||
93c3e8f5 | 766 | static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked) |
466f8004 AE |
767 | { |
768 | struct l2cap_chan *chan; | |
769 | int err; | |
770 | ||
771 | chan = l2cap_chan_create(); | |
772 | if (!chan) | |
773 | return NULL; | |
774 | ||
775 | BT_DBG("chan %p", chan); | |
776 | ||
2338a7e0 JH |
777 | chan->chan_type = L2CAP_CHAN_FIXED; |
778 | chan->scid = L2CAP_CID_A2MP; | |
779 | chan->dcid = L2CAP_CID_A2MP; | |
780 | chan->omtu = L2CAP_A2MP_DEFAULT_MTU; | |
781 | chan->imtu = L2CAP_A2MP_DEFAULT_MTU; | |
466f8004 AE |
782 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
783 | ||
784 | chan->ops = &a2mp_chan_ops; | |
785 | ||
786 | l2cap_chan_set_defaults(chan); | |
787 | chan->remote_max_tx = chan->max_tx; | |
788 | chan->remote_tx_win = chan->tx_win; | |
789 | ||
790 | chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
791 | chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
792 | ||
793 | skb_queue_head_init(&chan->tx_q); | |
794 | ||
795 | chan->mode = L2CAP_MODE_ERTM; | |
796 | ||
797 | err = l2cap_ertm_init(chan); | |
798 | if (err < 0) { | |
799 | l2cap_chan_del(chan, 0); | |
800 | return NULL; | |
801 | } | |
802 | ||
803 | chan->conf_state = 0; | |
804 | ||
93c3e8f5 AE |
805 | if (locked) |
806 | __l2cap_chan_add(conn, chan); | |
807 | else | |
808 | l2cap_chan_add(conn, chan); | |
466f8004 AE |
809 | |
810 | chan->remote_mps = chan->omtu; | |
811 | chan->mps = chan->omtu; | |
812 | ||
813 | chan->state = BT_CONNECTED; | |
814 | ||
815 | return chan; | |
816 | } | |
9740e49d AE |
817 | |
818 | /* AMP Manager functions */ | |
f706adfe | 819 | struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr) |
9740e49d | 820 | { |
2c935bc5 | 821 | BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref)); |
9740e49d AE |
822 | |
823 | kref_get(&mgr->kref); | |
f706adfe AE |
824 | |
825 | return mgr; | |
9740e49d AE |
826 | } |
827 | ||
828 | static void amp_mgr_destroy(struct kref *kref) | |
829 | { | |
830 | struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref); | |
831 | ||
832 | BT_DBG("mgr %p", mgr); | |
833 | ||
f97268fc AE |
834 | mutex_lock(&_mgr_list_lock); |
835 | list_del(&mgr->list); | |
836 | mutex_unlock(&_mgr_list_lock); | |
837 | ||
52c0d6e5 | 838 | amp_ctrl_list_flush(mgr); |
9740e49d AE |
839 | kfree(mgr); |
840 | } | |
841 | ||
842 | int amp_mgr_put(struct amp_mgr *mgr) | |
843 | { | |
2c935bc5 | 844 | BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref)); |
9740e49d AE |
845 | |
846 | return kref_put(&mgr->kref, &_mgr_destroy); | |
847 | } | |
848 | ||
93c3e8f5 | 849 | static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked) |
9740e49d AE |
850 | { |
851 | struct amp_mgr *mgr; | |
852 | struct l2cap_chan *chan; | |
853 | ||
854 | mgr = kzalloc(sizeof(*mgr), GFP_KERNEL); | |
855 | if (!mgr) | |
856 | return NULL; | |
857 | ||
858 | BT_DBG("conn %p mgr %p", conn, mgr); | |
859 | ||
860 | mgr->l2cap_conn = conn; | |
861 | ||
93c3e8f5 | 862 | chan = a2mp_chan_open(conn, locked); |
9740e49d AE |
863 | if (!chan) { |
864 | kfree(mgr); | |
865 | return NULL; | |
866 | } | |
867 | ||
868 | mgr->a2mp_chan = chan; | |
869 | chan->data = mgr; | |
870 | ||
871 | conn->hcon->amp_mgr = mgr; | |
872 | ||
873 | kref_init(&mgr->kref); | |
874 | ||
52c0d6e5 AE |
875 | /* Remote AMP ctrl list initialization */ |
876 | INIT_LIST_HEAD(&mgr->amp_ctrls); | |
877 | mutex_init(&mgr->amp_ctrls_lock); | |
878 | ||
f97268fc AE |
879 | mutex_lock(&_mgr_list_lock); |
880 | list_add(&mgr->list, &_mgr_list); | |
881 | mutex_unlock(&_mgr_list_lock); | |
882 | ||
9740e49d AE |
883 | return mgr; |
884 | } | |
97e8e89d AE |
885 | |
886 | struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn, | |
887 | struct sk_buff *skb) | |
888 | { | |
889 | struct amp_mgr *mgr; | |
890 | ||
07e307f8 JH |
891 | if (conn->hcon->type != ACL_LINK) |
892 | return NULL; | |
893 | ||
93c3e8f5 | 894 | mgr = amp_mgr_create(conn, false); |
97e8e89d AE |
895 | if (!mgr) { |
896 | BT_ERR("Could not create AMP manager"); | |
897 | return NULL; | |
898 | } | |
899 | ||
900 | BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan); | |
901 | ||
902 | return mgr->a2mp_chan; | |
903 | } | |
f97268fc | 904 | |
8e2a0d92 AE |
905 | void a2mp_send_getinfo_rsp(struct hci_dev *hdev) |
906 | { | |
907 | struct amp_mgr *mgr; | |
908 | struct a2mp_info_rsp rsp; | |
909 | ||
910 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO); | |
911 | if (!mgr) | |
912 | return; | |
913 | ||
914 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
915 | ||
eddb7732 LAD |
916 | memset(&rsp, 0, sizeof(rsp)); |
917 | ||
8e2a0d92 AE |
918 | rsp.id = hdev->id; |
919 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
920 | ||
ece69126 | 921 | if (hdev->amp_type != AMP_TYPE_BREDR) { |
8e2a0d92 AE |
922 | rsp.status = 0; |
923 | rsp.total_bw = cpu_to_le32(hdev->amp_total_bw); | |
924 | rsp.max_bw = cpu_to_le32(hdev->amp_max_bw); | |
925 | rsp.min_latency = cpu_to_le32(hdev->amp_min_latency); | |
926 | rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap); | |
927 | rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size); | |
928 | } | |
929 | ||
930 | a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp); | |
931 | amp_mgr_put(mgr); | |
932 | } | |
903e4541 AE |
933 | |
934 | void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status) | |
935 | { | |
936 | struct amp_mgr *mgr; | |
937 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
938 | struct a2mp_amp_assoc_rsp *rsp; | |
939 | size_t len; | |
940 | ||
941 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
942 | if (!mgr) | |
943 | return; | |
944 | ||
945 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
946 | ||
947 | len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len; | |
948 | rsp = kzalloc(len, GFP_KERNEL); | |
949 | if (!rsp) { | |
950 | amp_mgr_put(mgr); | |
951 | return; | |
952 | } | |
953 | ||
954 | rsp->id = hdev->id; | |
955 | ||
956 | if (status) { | |
957 | rsp->status = A2MP_STATUS_INVALID_CTRL_ID; | |
958 | } else { | |
959 | rsp->status = A2MP_STATUS_SUCCESS; | |
960 | memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len); | |
961 | } | |
962 | ||
963 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp); | |
964 | amp_mgr_put(mgr); | |
965 | kfree(rsp); | |
966 | } | |
93c3e8f5 | 967 | |
9495b2ee AE |
968 | void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status) |
969 | { | |
970 | struct amp_mgr *mgr; | |
971 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
972 | struct a2mp_physlink_req *req; | |
973 | struct l2cap_chan *bredr_chan; | |
974 | size_t len; | |
975 | ||
976 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL); | |
977 | if (!mgr) | |
978 | return; | |
979 | ||
980 | len = sizeof(*req) + loc_assoc->len; | |
981 | ||
982 | BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len); | |
983 | ||
984 | req = kzalloc(len, GFP_KERNEL); | |
985 | if (!req) { | |
986 | amp_mgr_put(mgr); | |
987 | return; | |
988 | } | |
989 | ||
990 | bredr_chan = mgr->bredr_chan; | |
991 | if (!bredr_chan) | |
992 | goto clean; | |
993 | ||
994 | req->local_id = hdev->id; | |
fffadc08 | 995 | req->remote_id = bredr_chan->remote_amp_id; |
9495b2ee AE |
996 | memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len); |
997 | ||
998 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req); | |
999 | ||
1000 | clean: | |
1001 | amp_mgr_put(mgr); | |
1002 | kfree(req); | |
1003 | } | |
1004 | ||
8e05e3ba AE |
1005 | void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status) |
1006 | { | |
1007 | struct amp_mgr *mgr; | |
1008 | struct a2mp_physlink_rsp rsp; | |
1009 | struct hci_conn *hs_hcon; | |
1010 | ||
1011 | mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC); | |
1012 | if (!mgr) | |
1013 | return; | |
1014 | ||
eddb7732 LAD |
1015 | memset(&rsp, 0, sizeof(rsp)); |
1016 | ||
8e05e3ba AE |
1017 | hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT); |
1018 | if (!hs_hcon) { | |
1019 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
1020 | } else { | |
1021 | rsp.remote_id = hs_hcon->remote_id; | |
1022 | rsp.status = A2MP_STATUS_SUCCESS; | |
1023 | } | |
1024 | ||
1025 | BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon, | |
1026 | status); | |
1027 | ||
1028 | rsp.local_id = hdev->id; | |
1029 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp); | |
1030 | amp_mgr_put(mgr); | |
1031 | } | |
1032 | ||
93c3e8f5 AE |
1033 | void a2mp_discover_amp(struct l2cap_chan *chan) |
1034 | { | |
1035 | struct l2cap_conn *conn = chan->conn; | |
1036 | struct amp_mgr *mgr = conn->hcon->amp_mgr; | |
1037 | struct a2mp_discov_req req; | |
1038 | ||
1039 | BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr); | |
1040 | ||
1041 | if (!mgr) { | |
1042 | mgr = amp_mgr_create(conn, true); | |
1043 | if (!mgr) | |
1044 | return; | |
1045 | } | |
1046 | ||
1047 | mgr->bredr_chan = chan; | |
1048 | ||
eddb7732 LAD |
1049 | memset(&req, 0, sizeof(req)); |
1050 | ||
93c3e8f5 AE |
1051 | req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); |
1052 | req.ext_feat = 0; | |
1053 | a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req); | |
1054 | } |