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> | |
9740e49d | 18 | #include <net/bluetooth/a2mp.h> |
903e4541 | 19 | #include <net/bluetooth/amp.h> |
466f8004 | 20 | |
f97268fc AE |
21 | /* Global AMP Manager list */ |
22 | LIST_HEAD(amp_mgr_list); | |
23 | DEFINE_MUTEX(amp_mgr_list_lock); | |
24 | ||
f6d3c6e7 AE |
25 | /* A2MP build & send command helper functions */ |
26 | static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data) | |
27 | { | |
28 | struct a2mp_cmd *cmd; | |
29 | int plen; | |
30 | ||
31 | plen = sizeof(*cmd) + len; | |
32 | cmd = kzalloc(plen, GFP_KERNEL); | |
33 | if (!cmd) | |
34 | return NULL; | |
35 | ||
36 | cmd->code = code; | |
37 | cmd->ident = ident; | |
38 | cmd->len = cpu_to_le16(len); | |
39 | ||
40 | memcpy(cmd->data, data, len); | |
41 | ||
42 | return cmd; | |
43 | } | |
44 | ||
8e2a0d92 | 45 | void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data) |
f6d3c6e7 AE |
46 | { |
47 | struct l2cap_chan *chan = mgr->a2mp_chan; | |
48 | struct a2mp_cmd *cmd; | |
49 | u16 total_len = len + sizeof(*cmd); | |
50 | struct kvec iv; | |
51 | struct msghdr msg; | |
52 | ||
53 | cmd = __a2mp_build(code, ident, len, data); | |
54 | if (!cmd) | |
55 | return; | |
56 | ||
57 | iv.iov_base = cmd; | |
58 | iv.iov_len = total_len; | |
59 | ||
60 | memset(&msg, 0, sizeof(msg)); | |
61 | ||
62 | msg.msg_iov = (struct iovec *) &iv; | |
63 | msg.msg_iovlen = 1; | |
64 | ||
65 | l2cap_chan_send(chan, &msg, total_len, 0); | |
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; | |
92 | cl[i].status = hdev->amp_status; | |
93 | i++; | |
94 | } | |
8598d064 AE |
95 | } |
96 | } | |
97 | ||
21dbd2ce AE |
98 | /* Processing A2MP messages */ |
99 | static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb, | |
100 | struct a2mp_cmd *hdr) | |
101 | { | |
102 | struct a2mp_cmd_rej *rej = (void *) skb->data; | |
103 | ||
104 | if (le16_to_cpu(hdr->len) < sizeof(*rej)) | |
105 | return -EINVAL; | |
106 | ||
107 | BT_DBG("ident %d reason %d", hdr->ident, le16_to_cpu(rej->reason)); | |
108 | ||
109 | skb_pull(skb, sizeof(*rej)); | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
8598d064 AE |
114 | static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb, |
115 | struct a2mp_cmd *hdr) | |
116 | { | |
117 | struct a2mp_discov_req *req = (void *) skb->data; | |
118 | u16 len = le16_to_cpu(hdr->len); | |
119 | struct a2mp_discov_rsp *rsp; | |
120 | u16 ext_feat; | |
121 | u8 num_ctrl; | |
f822c411 | 122 | struct hci_dev *hdev; |
8598d064 AE |
123 | |
124 | if (len < sizeof(*req)) | |
125 | return -EINVAL; | |
126 | ||
127 | skb_pull(skb, sizeof(*req)); | |
128 | ||
129 | ext_feat = le16_to_cpu(req->ext_feat); | |
130 | ||
131 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat); | |
132 | ||
133 | /* check that packet is not broken for now */ | |
134 | while (ext_feat & A2MP_FEAT_EXT) { | |
135 | if (len < sizeof(ext_feat)) | |
136 | return -EINVAL; | |
137 | ||
138 | ext_feat = get_unaligned_le16(skb->data); | |
139 | BT_DBG("efm 0x%4.4x", ext_feat); | |
140 | len -= sizeof(ext_feat); | |
141 | skb_pull(skb, sizeof(ext_feat)); | |
142 | } | |
143 | ||
144 | read_lock(&hci_dev_list_lock); | |
145 | ||
f822c411 MH |
146 | /* at minimum the BR/EDR needs to be listed */ |
147 | num_ctrl = 1; | |
148 | ||
149 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
150 | if (hdev->dev_type == HCI_AMP) | |
151 | num_ctrl++; | |
152 | } | |
153 | ||
8598d064 AE |
154 | len = num_ctrl * sizeof(struct a2mp_cl) + sizeof(*rsp); |
155 | rsp = kmalloc(len, GFP_ATOMIC); | |
156 | if (!rsp) { | |
157 | read_unlock(&hci_dev_list_lock); | |
158 | return -ENOMEM; | |
159 | } | |
160 | ||
161 | rsp->mtu = __constant_cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); | |
162 | rsp->ext_feat = 0; | |
163 | ||
23f0cb41 | 164 | __a2mp_add_cl(mgr, rsp->cl); |
8598d064 AE |
165 | |
166 | read_unlock(&hci_dev_list_lock); | |
167 | ||
168 | a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp); | |
169 | ||
170 | kfree(rsp); | |
171 | return 0; | |
172 | } | |
173 | ||
aa09537d AE |
174 | static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
175 | struct a2mp_cmd *hdr) | |
176 | { | |
177 | struct a2mp_discov_rsp *rsp = (void *) skb->data; | |
178 | u16 len = le16_to_cpu(hdr->len); | |
179 | struct a2mp_cl *cl; | |
180 | u16 ext_feat; | |
2766be48 | 181 | bool found = false; |
aa09537d AE |
182 | |
183 | if (len < sizeof(*rsp)) | |
184 | return -EINVAL; | |
185 | ||
186 | len -= sizeof(*rsp); | |
187 | skb_pull(skb, sizeof(*rsp)); | |
188 | ||
189 | ext_feat = le16_to_cpu(rsp->ext_feat); | |
190 | ||
191 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat); | |
192 | ||
193 | /* check that packet is not broken for now */ | |
194 | while (ext_feat & A2MP_FEAT_EXT) { | |
195 | if (len < sizeof(ext_feat)) | |
196 | return -EINVAL; | |
197 | ||
198 | ext_feat = get_unaligned_le16(skb->data); | |
199 | BT_DBG("efm 0x%4.4x", ext_feat); | |
200 | len -= sizeof(ext_feat); | |
201 | skb_pull(skb, sizeof(ext_feat)); | |
202 | } | |
203 | ||
204 | cl = (void *) skb->data; | |
205 | while (len >= sizeof(*cl)) { | |
206 | BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type, | |
207 | cl->status); | |
208 | ||
a646bd81 | 209 | if (cl->id != AMP_ID_BREDR && cl->type != AMP_TYPE_BREDR) { |
aa09537d AE |
210 | struct a2mp_info_req req; |
211 | ||
2766be48 | 212 | found = true; |
aa09537d AE |
213 | req.id = cl->id; |
214 | a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr), | |
215 | sizeof(req), &req); | |
216 | } | |
217 | ||
218 | len -= sizeof(*cl); | |
219 | cl = (void *) skb_pull(skb, sizeof(*cl)); | |
220 | } | |
221 | ||
2766be48 AE |
222 | /* Fall back to L2CAP init sequence */ |
223 | if (!found) { | |
224 | struct l2cap_conn *conn = mgr->l2cap_conn; | |
225 | struct l2cap_chan *chan; | |
226 | ||
227 | mutex_lock(&conn->chan_lock); | |
228 | ||
229 | list_for_each_entry(chan, &conn->chan_l, list) { | |
230 | ||
231 | BT_DBG("chan %p state %s", chan, | |
232 | state_to_string(chan->state)); | |
233 | ||
234 | if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP) | |
235 | continue; | |
236 | ||
237 | l2cap_chan_lock(chan); | |
238 | ||
239 | if (chan->state == BT_CONNECT) | |
240 | l2cap_send_conn_req(chan); | |
241 | ||
242 | l2cap_chan_unlock(chan); | |
243 | } | |
244 | ||
245 | mutex_unlock(&conn->chan_lock); | |
246 | } | |
247 | ||
aa09537d AE |
248 | return 0; |
249 | } | |
250 | ||
329d81af AE |
251 | static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb, |
252 | struct a2mp_cmd *hdr) | |
253 | { | |
254 | struct a2mp_cl *cl = (void *) skb->data; | |
255 | ||
256 | while (skb->len >= sizeof(*cl)) { | |
257 | BT_DBG("Controller id %d type %d status %d", cl->id, cl->type, | |
258 | cl->status); | |
259 | cl = (struct a2mp_cl *) skb_pull(skb, sizeof(*cl)); | |
260 | } | |
261 | ||
262 | /* TODO send A2MP_CHANGE_RSP */ | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
47f2d97d AE |
267 | static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb, |
268 | struct a2mp_cmd *hdr) | |
269 | { | |
270 | struct a2mp_info_req *req = (void *) skb->data; | |
47f2d97d AE |
271 | struct hci_dev *hdev; |
272 | ||
273 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
274 | return -EINVAL; | |
275 | ||
276 | BT_DBG("id %d", req->id); | |
277 | ||
47f2d97d | 278 | hdev = hci_dev_get(req->id); |
bc8dce4f | 279 | if (!hdev || hdev->dev_type != HCI_AMP) { |
8e2a0d92 AE |
280 | struct a2mp_info_rsp rsp; |
281 | ||
282 | rsp.id = req->id; | |
283 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
284 | ||
285 | a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp), | |
286 | &rsp); | |
47f2d97d | 287 | |
bc8dce4f | 288 | goto done; |
8e2a0d92 | 289 | } |
47f2d97d | 290 | |
cb6801c6 | 291 | set_bit(READ_LOC_AMP_INFO, &mgr->state); |
bc8dce4f AE |
292 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL); |
293 | ||
294 | done: | |
295 | if (hdev) | |
296 | hci_dev_put(hdev); | |
47f2d97d AE |
297 | |
298 | skb_pull(skb, sizeof(*req)); | |
299 | return 0; | |
300 | } | |
301 | ||
0d868de9 AE |
302 | static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
303 | struct a2mp_cmd *hdr) | |
304 | { | |
305 | struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data; | |
306 | struct a2mp_amp_assoc_req req; | |
307 | struct amp_ctrl *ctrl; | |
308 | ||
309 | if (le16_to_cpu(hdr->len) < sizeof(*rsp)) | |
310 | return -EINVAL; | |
311 | ||
312 | BT_DBG("id %d status 0x%2.2x", rsp->id, rsp->status); | |
313 | ||
314 | if (rsp->status) | |
315 | return -EINVAL; | |
316 | ||
fa4ebc66 | 317 | ctrl = amp_ctrl_add(mgr, rsp->id); |
0d868de9 AE |
318 | if (!ctrl) |
319 | return -ENOMEM; | |
320 | ||
0d868de9 AE |
321 | req.id = rsp->id; |
322 | a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req), | |
323 | &req); | |
324 | ||
325 | skb_pull(skb, sizeof(*rsp)); | |
326 | return 0; | |
327 | } | |
328 | ||
a28381dc AE |
329 | static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb, |
330 | struct a2mp_cmd *hdr) | |
331 | { | |
332 | struct a2mp_amp_assoc_req *req = (void *) skb->data; | |
333 | struct hci_dev *hdev; | |
903e4541 | 334 | struct amp_mgr *tmp; |
a28381dc AE |
335 | |
336 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
337 | return -EINVAL; | |
338 | ||
339 | BT_DBG("id %d", req->id); | |
340 | ||
903e4541 AE |
341 | /* Make sure that other request is not processed */ |
342 | tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
343 | ||
a28381dc | 344 | hdev = hci_dev_get(req->id); |
ece69126 | 345 | if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) { |
a28381dc AE |
346 | struct a2mp_amp_assoc_rsp rsp; |
347 | rsp.id = req->id; | |
903e4541 AE |
348 | |
349 | if (tmp) { | |
350 | rsp.status = A2MP_STATUS_COLLISION_OCCURED; | |
351 | amp_mgr_put(tmp); | |
352 | } else { | |
353 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
354 | } | |
a28381dc AE |
355 | |
356 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp), | |
357 | &rsp); | |
903e4541 AE |
358 | |
359 | goto done; | |
a28381dc AE |
360 | } |
361 | ||
903e4541 | 362 | amp_read_loc_assoc(hdev, mgr); |
a28381dc | 363 | |
903e4541 | 364 | done: |
a28381dc AE |
365 | if (hdev) |
366 | hci_dev_put(hdev); | |
367 | ||
368 | skb_pull(skb, sizeof(*req)); | |
369 | return 0; | |
370 | } | |
371 | ||
9a5e94db AE |
372 | static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
373 | struct a2mp_cmd *hdr) | |
374 | { | |
375 | struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data; | |
376 | u16 len = le16_to_cpu(hdr->len); | |
377 | struct hci_dev *hdev; | |
378 | struct amp_ctrl *ctrl; | |
379 | struct hci_conn *hcon; | |
13465c0a | 380 | size_t assoc_len; |
9a5e94db AE |
381 | |
382 | if (len < sizeof(*rsp)) | |
383 | return -EINVAL; | |
384 | ||
13465c0a AE |
385 | assoc_len = len - sizeof(*rsp); |
386 | ||
387 | BT_DBG("id %d status 0x%2.2x assoc len %zu", rsp->id, rsp->status, | |
388 | assoc_len); | |
9a5e94db AE |
389 | |
390 | if (rsp->status) | |
391 | return -EINVAL; | |
392 | ||
393 | /* Save remote ASSOC data */ | |
394 | ctrl = amp_ctrl_lookup(mgr, rsp->id); | |
395 | if (ctrl) { | |
13465c0a | 396 | u8 *assoc; |
9a5e94db | 397 | |
5ae327f0 | 398 | assoc = kmemdup(rsp->amp_assoc, assoc_len, GFP_KERNEL); |
9a5e94db AE |
399 | if (!assoc) { |
400 | amp_ctrl_put(ctrl); | |
401 | return -ENOMEM; | |
402 | } | |
403 | ||
9a5e94db AE |
404 | ctrl->assoc = assoc; |
405 | ctrl->assoc_len = assoc_len; | |
406 | ctrl->assoc_rem_len = assoc_len; | |
407 | ctrl->assoc_len_so_far = 0; | |
408 | ||
409 | amp_ctrl_put(ctrl); | |
410 | } | |
411 | ||
412 | /* Create Phys Link */ | |
413 | hdev = hci_dev_get(rsp->id); | |
414 | if (!hdev) | |
415 | return -EINVAL; | |
416 | ||
a0c234fe | 417 | hcon = phylink_add(hdev, mgr, rsp->id, true); |
9a5e94db AE |
418 | if (!hcon) |
419 | goto done; | |
420 | ||
421 | BT_DBG("Created hcon %p: loc:%d -> rem:%d", hcon, hdev->id, rsp->id); | |
422 | ||
fffadc08 | 423 | mgr->bredr_chan->remote_amp_id = rsp->id; |
9495b2ee | 424 | |
a02226d6 AE |
425 | amp_create_phylink(hdev, mgr, hcon); |
426 | ||
9a5e94db AE |
427 | done: |
428 | hci_dev_put(hdev); | |
429 | skb_pull(skb, len); | |
430 | return 0; | |
431 | } | |
432 | ||
e072f5da AE |
433 | static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
434 | struct a2mp_cmd *hdr) | |
435 | { | |
436 | struct a2mp_physlink_req *req = (void *) skb->data; | |
437 | ||
438 | struct a2mp_physlink_rsp rsp; | |
439 | struct hci_dev *hdev; | |
cb8488c0 | 440 | struct hci_conn *hcon; |
0b26ab9d | 441 | struct amp_ctrl *ctrl; |
e072f5da AE |
442 | |
443 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
444 | return -EINVAL; | |
445 | ||
446 | BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id); | |
447 | ||
448 | rsp.local_id = req->remote_id; | |
449 | rsp.remote_id = req->local_id; | |
450 | ||
451 | hdev = hci_dev_get(req->remote_id); | |
ece69126 | 452 | if (!hdev || hdev->amp_type == AMP_TYPE_BREDR) { |
e072f5da AE |
453 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; |
454 | goto send_rsp; | |
455 | } | |
456 | ||
0b26ab9d AE |
457 | ctrl = amp_ctrl_lookup(mgr, rsp.remote_id); |
458 | if (!ctrl) { | |
fa4ebc66 | 459 | ctrl = amp_ctrl_add(mgr, rsp.remote_id); |
0b26ab9d AE |
460 | if (ctrl) { |
461 | amp_ctrl_get(ctrl); | |
462 | } else { | |
463 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
464 | goto send_rsp; | |
465 | } | |
466 | } | |
467 | ||
468 | if (ctrl) { | |
13465c0a AE |
469 | size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req); |
470 | u8 *assoc; | |
0b26ab9d | 471 | |
5ae327f0 | 472 | assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL); |
0b26ab9d AE |
473 | if (!assoc) { |
474 | amp_ctrl_put(ctrl); | |
475 | return -ENOMEM; | |
476 | } | |
477 | ||
0b26ab9d AE |
478 | ctrl->assoc = assoc; |
479 | ctrl->assoc_len = assoc_len; | |
480 | ctrl->assoc_rem_len = assoc_len; | |
481 | ctrl->assoc_len_so_far = 0; | |
482 | ||
483 | amp_ctrl_put(ctrl); | |
484 | } | |
485 | ||
a0c234fe | 486 | hcon = phylink_add(hdev, mgr, req->local_id, false); |
cb8488c0 | 487 | if (hcon) { |
dffa3871 | 488 | amp_accept_phylink(hdev, mgr, hcon); |
cb8488c0 AE |
489 | rsp.status = A2MP_STATUS_SUCCESS; |
490 | } else { | |
491 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
492 | } | |
e072f5da AE |
493 | |
494 | send_rsp: | |
495 | if (hdev) | |
496 | hci_dev_put(hdev); | |
497 | ||
8e05e3ba AE |
498 | /* Reply error now and success after HCI Write Remote AMP Assoc |
499 | command complete with success status | |
500 | */ | |
501 | if (rsp.status != A2MP_STATUS_SUCCESS) { | |
502 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, | |
503 | sizeof(rsp), &rsp); | |
504 | } else { | |
cb6801c6 | 505 | set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state); |
8e05e3ba AE |
506 | mgr->ident = hdr->ident; |
507 | } | |
e072f5da AE |
508 | |
509 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
510 | return 0; | |
511 | } | |
512 | ||
6113f84f AE |
513 | static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
514 | struct a2mp_cmd *hdr) | |
515 | { | |
516 | struct a2mp_physlink_req *req = (void *) skb->data; | |
517 | struct a2mp_physlink_rsp rsp; | |
518 | struct hci_dev *hdev; | |
cb8488c0 | 519 | struct hci_conn *hcon; |
6113f84f AE |
520 | |
521 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
522 | return -EINVAL; | |
523 | ||
524 | BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id); | |
525 | ||
526 | rsp.local_id = req->remote_id; | |
527 | rsp.remote_id = req->local_id; | |
528 | rsp.status = A2MP_STATUS_SUCCESS; | |
529 | ||
cb8488c0 | 530 | hdev = hci_dev_get(req->remote_id); |
6113f84f AE |
531 | if (!hdev) { |
532 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
533 | goto send_rsp; | |
534 | } | |
535 | ||
cb8488c0 AE |
536 | hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, mgr->l2cap_conn->dst); |
537 | if (!hcon) { | |
538 | BT_ERR("No phys link exist"); | |
539 | rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS; | |
540 | goto clean; | |
541 | } | |
542 | ||
6113f84f AE |
543 | /* TODO Disconnect Phys Link here */ |
544 | ||
cb8488c0 | 545 | clean: |
6113f84f AE |
546 | hci_dev_put(hdev); |
547 | ||
548 | send_rsp: | |
549 | a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp); | |
550 | ||
551 | skb_pull(skb, sizeof(*req)); | |
552 | return 0; | |
553 | } | |
554 | ||
f6410a84 AE |
555 | static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
556 | struct a2mp_cmd *hdr) | |
557 | { | |
8e8c7e36 | 558 | BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code); |
f6410a84 AE |
559 | |
560 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
561 | return 0; | |
562 | } | |
563 | ||
6b44d9b8 AE |
564 | /* Handle A2MP signalling */ |
565 | static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) | |
566 | { | |
d9fc1d54 | 567 | struct a2mp_cmd *hdr; |
6b44d9b8 AE |
568 | struct amp_mgr *mgr = chan->data; |
569 | int err = 0; | |
570 | ||
571 | amp_mgr_get(mgr); | |
572 | ||
573 | while (skb->len >= sizeof(*hdr)) { | |
d9fc1d54 AE |
574 | u16 len; |
575 | ||
576 | hdr = (void *) skb->data; | |
577 | len = le16_to_cpu(hdr->len); | |
6b44d9b8 | 578 | |
8e8c7e36 | 579 | BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len); |
6b44d9b8 AE |
580 | |
581 | skb_pull(skb, sizeof(*hdr)); | |
582 | ||
583 | if (len > skb->len || !hdr->ident) { | |
584 | err = -EINVAL; | |
585 | break; | |
586 | } | |
587 | ||
588 | mgr->ident = hdr->ident; | |
589 | ||
590 | switch (hdr->code) { | |
591 | case A2MP_COMMAND_REJ: | |
21dbd2ce AE |
592 | a2mp_command_rej(mgr, skb, hdr); |
593 | break; | |
594 | ||
6b44d9b8 | 595 | case A2MP_DISCOVER_REQ: |
8598d064 AE |
596 | err = a2mp_discover_req(mgr, skb, hdr); |
597 | break; | |
598 | ||
6b44d9b8 | 599 | case A2MP_CHANGE_NOTIFY: |
329d81af AE |
600 | err = a2mp_change_notify(mgr, skb, hdr); |
601 | break; | |
602 | ||
6b44d9b8 | 603 | case A2MP_GETINFO_REQ: |
47f2d97d AE |
604 | err = a2mp_getinfo_req(mgr, skb, hdr); |
605 | break; | |
606 | ||
6b44d9b8 | 607 | case A2MP_GETAMPASSOC_REQ: |
a28381dc AE |
608 | err = a2mp_getampassoc_req(mgr, skb, hdr); |
609 | break; | |
610 | ||
6b44d9b8 | 611 | case A2MP_CREATEPHYSLINK_REQ: |
e072f5da AE |
612 | err = a2mp_createphyslink_req(mgr, skb, hdr); |
613 | break; | |
614 | ||
6b44d9b8 | 615 | case A2MP_DISCONNPHYSLINK_REQ: |
6113f84f AE |
616 | err = a2mp_discphyslink_req(mgr, skb, hdr); |
617 | break; | |
618 | ||
6b44d9b8 | 619 | case A2MP_DISCOVER_RSP: |
aa09537d AE |
620 | err = a2mp_discover_rsp(mgr, skb, hdr); |
621 | break; | |
622 | ||
6b44d9b8 | 623 | case A2MP_GETINFO_RSP: |
0d868de9 AE |
624 | err = a2mp_getinfo_rsp(mgr, skb, hdr); |
625 | break; | |
626 | ||
6b44d9b8 | 627 | case A2MP_GETAMPASSOC_RSP: |
9a5e94db AE |
628 | err = a2mp_getampassoc_rsp(mgr, skb, hdr); |
629 | break; | |
630 | ||
631 | case A2MP_CHANGE_RSP: | |
6b44d9b8 AE |
632 | case A2MP_CREATEPHYSLINK_RSP: |
633 | case A2MP_DISCONNPHYSLINK_RSP: | |
f6410a84 AE |
634 | err = a2mp_cmd_rsp(mgr, skb, hdr); |
635 | break; | |
636 | ||
6b44d9b8 AE |
637 | default: |
638 | BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code); | |
639 | err = -EINVAL; | |
640 | break; | |
641 | } | |
642 | } | |
643 | ||
644 | if (err) { | |
645 | struct a2mp_cmd_rej rej; | |
d9fc1d54 | 646 | |
6b44d9b8 | 647 | rej.reason = __constant_cpu_to_le16(0); |
d9fc1d54 | 648 | hdr = (void *) skb->data; |
6b44d9b8 AE |
649 | |
650 | BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err); | |
651 | ||
652 | a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej), | |
653 | &rej); | |
654 | } | |
655 | ||
656 | /* Always free skb and return success error code to prevent | |
657 | from sending L2CAP Disconnect over A2MP channel */ | |
658 | kfree_skb(skb); | |
659 | ||
660 | amp_mgr_put(mgr); | |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
46d5c908 AE |
665 | static void a2mp_chan_close_cb(struct l2cap_chan *chan) |
666 | { | |
4af66c69 | 667 | l2cap_chan_put(chan); |
46d5c908 AE |
668 | } |
669 | ||
670 | static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state) | |
671 | { | |
672 | struct amp_mgr *mgr = chan->data; | |
673 | ||
674 | if (!mgr) | |
675 | return; | |
676 | ||
677 | BT_DBG("chan %p state %s", chan, state_to_string(state)); | |
678 | ||
679 | chan->state = state; | |
680 | ||
681 | switch (state) { | |
682 | case BT_CLOSED: | |
683 | if (mgr) | |
684 | amp_mgr_put(mgr); | |
685 | break; | |
686 | } | |
687 | } | |
688 | ||
689 | static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan, | |
690 | unsigned long len, int nb) | |
691 | { | |
692 | return bt_skb_alloc(len, GFP_KERNEL); | |
693 | } | |
694 | ||
466f8004 AE |
695 | static struct l2cap_ops a2mp_chan_ops = { |
696 | .name = "L2CAP A2MP channel", | |
6b44d9b8 | 697 | .recv = a2mp_chan_recv_cb, |
46d5c908 AE |
698 | .close = a2mp_chan_close_cb, |
699 | .state_change = a2mp_chan_state_change_cb, | |
700 | .alloc_skb = a2mp_chan_alloc_skb_cb, | |
701 | ||
702 | /* Not implemented for A2MP */ | |
7e1af8a3 GP |
703 | .new_connection = l2cap_chan_no_new_connection, |
704 | .teardown = l2cap_chan_no_teardown, | |
705 | .ready = l2cap_chan_no_ready, | |
2dc4e510 | 706 | .defer = l2cap_chan_no_defer, |
466f8004 AE |
707 | }; |
708 | ||
93c3e8f5 | 709 | static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked) |
466f8004 AE |
710 | { |
711 | struct l2cap_chan *chan; | |
712 | int err; | |
713 | ||
714 | chan = l2cap_chan_create(); | |
715 | if (!chan) | |
716 | return NULL; | |
717 | ||
718 | BT_DBG("chan %p", chan); | |
719 | ||
416fa752 | 720 | chan->chan_type = L2CAP_CHAN_CONN_FIX_A2MP; |
466f8004 AE |
721 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
722 | ||
723 | chan->ops = &a2mp_chan_ops; | |
724 | ||
725 | l2cap_chan_set_defaults(chan); | |
726 | chan->remote_max_tx = chan->max_tx; | |
727 | chan->remote_tx_win = chan->tx_win; | |
728 | ||
729 | chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
730 | chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
731 | ||
732 | skb_queue_head_init(&chan->tx_q); | |
733 | ||
734 | chan->mode = L2CAP_MODE_ERTM; | |
735 | ||
736 | err = l2cap_ertm_init(chan); | |
737 | if (err < 0) { | |
738 | l2cap_chan_del(chan, 0); | |
739 | return NULL; | |
740 | } | |
741 | ||
742 | chan->conf_state = 0; | |
743 | ||
93c3e8f5 AE |
744 | if (locked) |
745 | __l2cap_chan_add(conn, chan); | |
746 | else | |
747 | l2cap_chan_add(conn, chan); | |
466f8004 AE |
748 | |
749 | chan->remote_mps = chan->omtu; | |
750 | chan->mps = chan->omtu; | |
751 | ||
752 | chan->state = BT_CONNECTED; | |
753 | ||
754 | return chan; | |
755 | } | |
9740e49d AE |
756 | |
757 | /* AMP Manager functions */ | |
f706adfe | 758 | struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr) |
9740e49d | 759 | { |
a0dfe0ab | 760 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
761 | |
762 | kref_get(&mgr->kref); | |
f706adfe AE |
763 | |
764 | return mgr; | |
9740e49d AE |
765 | } |
766 | ||
767 | static void amp_mgr_destroy(struct kref *kref) | |
768 | { | |
769 | struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref); | |
770 | ||
771 | BT_DBG("mgr %p", mgr); | |
772 | ||
f97268fc AE |
773 | mutex_lock(&_mgr_list_lock); |
774 | list_del(&mgr->list); | |
775 | mutex_unlock(&_mgr_list_lock); | |
776 | ||
52c0d6e5 | 777 | amp_ctrl_list_flush(mgr); |
9740e49d AE |
778 | kfree(mgr); |
779 | } | |
780 | ||
781 | int amp_mgr_put(struct amp_mgr *mgr) | |
782 | { | |
a0dfe0ab | 783 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
784 | |
785 | return kref_put(&mgr->kref, &_mgr_destroy); | |
786 | } | |
787 | ||
93c3e8f5 | 788 | static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked) |
9740e49d AE |
789 | { |
790 | struct amp_mgr *mgr; | |
791 | struct l2cap_chan *chan; | |
792 | ||
793 | mgr = kzalloc(sizeof(*mgr), GFP_KERNEL); | |
794 | if (!mgr) | |
795 | return NULL; | |
796 | ||
797 | BT_DBG("conn %p mgr %p", conn, mgr); | |
798 | ||
799 | mgr->l2cap_conn = conn; | |
800 | ||
93c3e8f5 | 801 | chan = a2mp_chan_open(conn, locked); |
9740e49d AE |
802 | if (!chan) { |
803 | kfree(mgr); | |
804 | return NULL; | |
805 | } | |
806 | ||
807 | mgr->a2mp_chan = chan; | |
808 | chan->data = mgr; | |
809 | ||
810 | conn->hcon->amp_mgr = mgr; | |
811 | ||
812 | kref_init(&mgr->kref); | |
813 | ||
52c0d6e5 AE |
814 | /* Remote AMP ctrl list initialization */ |
815 | INIT_LIST_HEAD(&mgr->amp_ctrls); | |
816 | mutex_init(&mgr->amp_ctrls_lock); | |
817 | ||
f97268fc AE |
818 | mutex_lock(&_mgr_list_lock); |
819 | list_add(&mgr->list, &_mgr_list); | |
820 | mutex_unlock(&_mgr_list_lock); | |
821 | ||
9740e49d AE |
822 | return mgr; |
823 | } | |
97e8e89d AE |
824 | |
825 | struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn, | |
826 | struct sk_buff *skb) | |
827 | { | |
828 | struct amp_mgr *mgr; | |
829 | ||
93c3e8f5 | 830 | mgr = amp_mgr_create(conn, false); |
97e8e89d AE |
831 | if (!mgr) { |
832 | BT_ERR("Could not create AMP manager"); | |
833 | return NULL; | |
834 | } | |
835 | ||
836 | BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan); | |
837 | ||
838 | return mgr->a2mp_chan; | |
839 | } | |
f97268fc AE |
840 | |
841 | struct amp_mgr *amp_mgr_lookup_by_state(u8 state) | |
842 | { | |
843 | struct amp_mgr *mgr; | |
844 | ||
845 | mutex_lock(&_mgr_list_lock); | |
846 | list_for_each_entry(mgr, &_mgr_list, list) { | |
cb6801c6 | 847 | if (test_and_clear_bit(state, &mgr->state)) { |
f97268fc AE |
848 | amp_mgr_get(mgr); |
849 | mutex_unlock(&_mgr_list_lock); | |
850 | return mgr; | |
851 | } | |
852 | } | |
853 | mutex_unlock(&_mgr_list_lock); | |
854 | ||
855 | return NULL; | |
856 | } | |
8e2a0d92 AE |
857 | |
858 | void a2mp_send_getinfo_rsp(struct hci_dev *hdev) | |
859 | { | |
860 | struct amp_mgr *mgr; | |
861 | struct a2mp_info_rsp rsp; | |
862 | ||
863 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO); | |
864 | if (!mgr) | |
865 | return; | |
866 | ||
867 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
868 | ||
869 | rsp.id = hdev->id; | |
870 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
871 | ||
ece69126 | 872 | if (hdev->amp_type != AMP_TYPE_BREDR) { |
8e2a0d92 AE |
873 | rsp.status = 0; |
874 | rsp.total_bw = cpu_to_le32(hdev->amp_total_bw); | |
875 | rsp.max_bw = cpu_to_le32(hdev->amp_max_bw); | |
876 | rsp.min_latency = cpu_to_le32(hdev->amp_min_latency); | |
877 | rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap); | |
878 | rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size); | |
879 | } | |
880 | ||
881 | a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp); | |
882 | amp_mgr_put(mgr); | |
883 | } | |
903e4541 AE |
884 | |
885 | void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status) | |
886 | { | |
887 | struct amp_mgr *mgr; | |
888 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
889 | struct a2mp_amp_assoc_rsp *rsp; | |
890 | size_t len; | |
891 | ||
892 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
893 | if (!mgr) | |
894 | return; | |
895 | ||
896 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
897 | ||
898 | len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len; | |
899 | rsp = kzalloc(len, GFP_KERNEL); | |
900 | if (!rsp) { | |
901 | amp_mgr_put(mgr); | |
902 | return; | |
903 | } | |
904 | ||
905 | rsp->id = hdev->id; | |
906 | ||
907 | if (status) { | |
908 | rsp->status = A2MP_STATUS_INVALID_CTRL_ID; | |
909 | } else { | |
910 | rsp->status = A2MP_STATUS_SUCCESS; | |
911 | memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len); | |
912 | } | |
913 | ||
914 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp); | |
915 | amp_mgr_put(mgr); | |
916 | kfree(rsp); | |
917 | } | |
93c3e8f5 | 918 | |
9495b2ee AE |
919 | void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status) |
920 | { | |
921 | struct amp_mgr *mgr; | |
922 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
923 | struct a2mp_physlink_req *req; | |
924 | struct l2cap_chan *bredr_chan; | |
925 | size_t len; | |
926 | ||
927 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL); | |
928 | if (!mgr) | |
929 | return; | |
930 | ||
931 | len = sizeof(*req) + loc_assoc->len; | |
932 | ||
933 | BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len); | |
934 | ||
935 | req = kzalloc(len, GFP_KERNEL); | |
936 | if (!req) { | |
937 | amp_mgr_put(mgr); | |
938 | return; | |
939 | } | |
940 | ||
941 | bredr_chan = mgr->bredr_chan; | |
942 | if (!bredr_chan) | |
943 | goto clean; | |
944 | ||
945 | req->local_id = hdev->id; | |
fffadc08 | 946 | req->remote_id = bredr_chan->remote_amp_id; |
9495b2ee AE |
947 | memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len); |
948 | ||
949 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req); | |
950 | ||
951 | clean: | |
952 | amp_mgr_put(mgr); | |
953 | kfree(req); | |
954 | } | |
955 | ||
8e05e3ba AE |
956 | void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status) |
957 | { | |
958 | struct amp_mgr *mgr; | |
959 | struct a2mp_physlink_rsp rsp; | |
960 | struct hci_conn *hs_hcon; | |
961 | ||
962 | mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC); | |
963 | if (!mgr) | |
964 | return; | |
965 | ||
966 | hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT); | |
967 | if (!hs_hcon) { | |
968 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
969 | } else { | |
970 | rsp.remote_id = hs_hcon->remote_id; | |
971 | rsp.status = A2MP_STATUS_SUCCESS; | |
972 | } | |
973 | ||
974 | BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon, | |
975 | status); | |
976 | ||
977 | rsp.local_id = hdev->id; | |
978 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp); | |
979 | amp_mgr_put(mgr); | |
980 | } | |
981 | ||
93c3e8f5 AE |
982 | void a2mp_discover_amp(struct l2cap_chan *chan) |
983 | { | |
984 | struct l2cap_conn *conn = chan->conn; | |
985 | struct amp_mgr *mgr = conn->hcon->amp_mgr; | |
986 | struct a2mp_discov_req req; | |
987 | ||
988 | BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr); | |
989 | ||
990 | if (!mgr) { | |
991 | mgr = amp_mgr_create(conn, true); | |
992 | if (!mgr) | |
993 | return; | |
994 | } | |
995 | ||
996 | mgr->bredr_chan = chan; | |
997 | ||
998 | req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); | |
999 | req.ext_feat = 0; | |
1000 | a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req); | |
1001 | } |