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 AE |
78 | static inline void __a2mp_cl_bredr(struct a2mp_cl *cl) |
79 | { | |
80 | cl->id = 0; | |
81 | cl->type = 0; | |
82 | cl->status = 1; | |
83 | } | |
84 | ||
85 | /* hci_dev_list shall be locked */ | |
86 | static void __a2mp_add_cl(struct amp_mgr *mgr, struct a2mp_cl *cl, u8 num_ctrl) | |
87 | { | |
88 | int i = 0; | |
89 | struct hci_dev *hdev; | |
90 | ||
91 | __a2mp_cl_bredr(cl); | |
92 | ||
93 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
94 | /* Iterate through AMP controllers */ | |
95 | if (hdev->id == HCI_BREDR_ID) | |
96 | continue; | |
97 | ||
98 | /* Starting from second entry */ | |
99 | if (++i >= num_ctrl) | |
100 | return; | |
101 | ||
102 | cl[i].id = hdev->id; | |
103 | cl[i].type = hdev->amp_type; | |
104 | cl[i].status = hdev->amp_status; | |
105 | } | |
106 | } | |
107 | ||
21dbd2ce AE |
108 | /* Processing A2MP messages */ |
109 | static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb, | |
110 | struct a2mp_cmd *hdr) | |
111 | { | |
112 | struct a2mp_cmd_rej *rej = (void *) skb->data; | |
113 | ||
114 | if (le16_to_cpu(hdr->len) < sizeof(*rej)) | |
115 | return -EINVAL; | |
116 | ||
117 | BT_DBG("ident %d reason %d", hdr->ident, le16_to_cpu(rej->reason)); | |
118 | ||
119 | skb_pull(skb, sizeof(*rej)); | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
8598d064 AE |
124 | static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb, |
125 | struct a2mp_cmd *hdr) | |
126 | { | |
127 | struct a2mp_discov_req *req = (void *) skb->data; | |
128 | u16 len = le16_to_cpu(hdr->len); | |
129 | struct a2mp_discov_rsp *rsp; | |
130 | u16 ext_feat; | |
131 | u8 num_ctrl; | |
132 | ||
133 | if (len < sizeof(*req)) | |
134 | return -EINVAL; | |
135 | ||
136 | skb_pull(skb, sizeof(*req)); | |
137 | ||
138 | ext_feat = le16_to_cpu(req->ext_feat); | |
139 | ||
140 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat); | |
141 | ||
142 | /* check that packet is not broken for now */ | |
143 | while (ext_feat & A2MP_FEAT_EXT) { | |
144 | if (len < sizeof(ext_feat)) | |
145 | return -EINVAL; | |
146 | ||
147 | ext_feat = get_unaligned_le16(skb->data); | |
148 | BT_DBG("efm 0x%4.4x", ext_feat); | |
149 | len -= sizeof(ext_feat); | |
150 | skb_pull(skb, sizeof(ext_feat)); | |
151 | } | |
152 | ||
153 | read_lock(&hci_dev_list_lock); | |
154 | ||
155 | num_ctrl = __hci_num_ctrl(); | |
156 | len = num_ctrl * sizeof(struct a2mp_cl) + sizeof(*rsp); | |
157 | rsp = kmalloc(len, GFP_ATOMIC); | |
158 | if (!rsp) { | |
159 | read_unlock(&hci_dev_list_lock); | |
160 | return -ENOMEM; | |
161 | } | |
162 | ||
163 | rsp->mtu = __constant_cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); | |
164 | rsp->ext_feat = 0; | |
165 | ||
166 | __a2mp_add_cl(mgr, rsp->cl, num_ctrl); | |
167 | ||
168 | read_unlock(&hci_dev_list_lock); | |
169 | ||
170 | a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp); | |
171 | ||
172 | kfree(rsp); | |
173 | return 0; | |
174 | } | |
175 | ||
aa09537d AE |
176 | static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
177 | struct a2mp_cmd *hdr) | |
178 | { | |
179 | struct a2mp_discov_rsp *rsp = (void *) skb->data; | |
180 | u16 len = le16_to_cpu(hdr->len); | |
181 | struct a2mp_cl *cl; | |
182 | u16 ext_feat; | |
2766be48 | 183 | bool found = false; |
aa09537d AE |
184 | |
185 | if (len < sizeof(*rsp)) | |
186 | return -EINVAL; | |
187 | ||
188 | len -= sizeof(*rsp); | |
189 | skb_pull(skb, sizeof(*rsp)); | |
190 | ||
191 | ext_feat = le16_to_cpu(rsp->ext_feat); | |
192 | ||
193 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat); | |
194 | ||
195 | /* check that packet is not broken for now */ | |
196 | while (ext_feat & A2MP_FEAT_EXT) { | |
197 | if (len < sizeof(ext_feat)) | |
198 | return -EINVAL; | |
199 | ||
200 | ext_feat = get_unaligned_le16(skb->data); | |
201 | BT_DBG("efm 0x%4.4x", ext_feat); | |
202 | len -= sizeof(ext_feat); | |
203 | skb_pull(skb, sizeof(ext_feat)); | |
204 | } | |
205 | ||
206 | cl = (void *) skb->data; | |
207 | while (len >= sizeof(*cl)) { | |
208 | BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type, | |
209 | cl->status); | |
210 | ||
211 | if (cl->id != HCI_BREDR_ID && cl->type == HCI_AMP) { | |
212 | struct a2mp_info_req req; | |
213 | ||
2766be48 | 214 | found = true; |
aa09537d AE |
215 | req.id = cl->id; |
216 | a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr), | |
217 | sizeof(req), &req); | |
218 | } | |
219 | ||
220 | len -= sizeof(*cl); | |
221 | cl = (void *) skb_pull(skb, sizeof(*cl)); | |
222 | } | |
223 | ||
2766be48 AE |
224 | /* Fall back to L2CAP init sequence */ |
225 | if (!found) { | |
226 | struct l2cap_conn *conn = mgr->l2cap_conn; | |
227 | struct l2cap_chan *chan; | |
228 | ||
229 | mutex_lock(&conn->chan_lock); | |
230 | ||
231 | list_for_each_entry(chan, &conn->chan_l, list) { | |
232 | ||
233 | BT_DBG("chan %p state %s", chan, | |
234 | state_to_string(chan->state)); | |
235 | ||
236 | if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP) | |
237 | continue; | |
238 | ||
239 | l2cap_chan_lock(chan); | |
240 | ||
241 | if (chan->state == BT_CONNECT) | |
242 | l2cap_send_conn_req(chan); | |
243 | ||
244 | l2cap_chan_unlock(chan); | |
245 | } | |
246 | ||
247 | mutex_unlock(&conn->chan_lock); | |
248 | } | |
249 | ||
aa09537d AE |
250 | return 0; |
251 | } | |
252 | ||
329d81af AE |
253 | static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb, |
254 | struct a2mp_cmd *hdr) | |
255 | { | |
256 | struct a2mp_cl *cl = (void *) skb->data; | |
257 | ||
258 | while (skb->len >= sizeof(*cl)) { | |
259 | BT_DBG("Controller id %d type %d status %d", cl->id, cl->type, | |
260 | cl->status); | |
261 | cl = (struct a2mp_cl *) skb_pull(skb, sizeof(*cl)); | |
262 | } | |
263 | ||
264 | /* TODO send A2MP_CHANGE_RSP */ | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
47f2d97d AE |
269 | static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb, |
270 | struct a2mp_cmd *hdr) | |
271 | { | |
272 | struct a2mp_info_req *req = (void *) skb->data; | |
47f2d97d AE |
273 | struct hci_dev *hdev; |
274 | ||
275 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
276 | return -EINVAL; | |
277 | ||
278 | BT_DBG("id %d", req->id); | |
279 | ||
47f2d97d | 280 | hdev = hci_dev_get(req->id); |
8e2a0d92 AE |
281 | if (!hdev) { |
282 | struct a2mp_info_rsp rsp; | |
283 | ||
284 | rsp.id = req->id; | |
285 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
286 | ||
287 | a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp), | |
288 | &rsp); | |
47f2d97d AE |
289 | } |
290 | ||
8e2a0d92 AE |
291 | if (hdev->dev_type != HCI_BREDR) { |
292 | mgr->state = READ_LOC_AMP_INFO; | |
293 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL); | |
294 | } | |
47f2d97d | 295 | |
8e2a0d92 | 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 | ||
317 | ctrl = amp_ctrl_add(mgr); | |
318 | if (!ctrl) | |
319 | return -ENOMEM; | |
320 | ||
321 | ctrl->id = rsp->id; | |
322 | ||
323 | req.id = rsp->id; | |
324 | a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req), | |
325 | &req); | |
326 | ||
327 | skb_pull(skb, sizeof(*rsp)); | |
328 | return 0; | |
329 | } | |
330 | ||
a28381dc AE |
331 | static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb, |
332 | struct a2mp_cmd *hdr) | |
333 | { | |
334 | struct a2mp_amp_assoc_req *req = (void *) skb->data; | |
335 | struct hci_dev *hdev; | |
903e4541 | 336 | struct amp_mgr *tmp; |
a28381dc AE |
337 | |
338 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
339 | return -EINVAL; | |
340 | ||
341 | BT_DBG("id %d", req->id); | |
342 | ||
903e4541 AE |
343 | /* Make sure that other request is not processed */ |
344 | tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
345 | ||
a28381dc | 346 | hdev = hci_dev_get(req->id); |
903e4541 | 347 | if (!hdev || hdev->amp_type == HCI_BREDR || tmp) { |
a28381dc AE |
348 | struct a2mp_amp_assoc_rsp rsp; |
349 | rsp.id = req->id; | |
903e4541 AE |
350 | |
351 | if (tmp) { | |
352 | rsp.status = A2MP_STATUS_COLLISION_OCCURED; | |
353 | amp_mgr_put(tmp); | |
354 | } else { | |
355 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
356 | } | |
a28381dc AE |
357 | |
358 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp), | |
359 | &rsp); | |
903e4541 AE |
360 | |
361 | goto done; | |
a28381dc AE |
362 | } |
363 | ||
903e4541 | 364 | amp_read_loc_assoc(hdev, mgr); |
a28381dc | 365 | |
903e4541 | 366 | done: |
a28381dc AE |
367 | if (hdev) |
368 | hci_dev_put(hdev); | |
369 | ||
370 | skb_pull(skb, sizeof(*req)); | |
371 | return 0; | |
372 | } | |
373 | ||
9a5e94db AE |
374 | static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
375 | struct a2mp_cmd *hdr) | |
376 | { | |
377 | struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data; | |
378 | u16 len = le16_to_cpu(hdr->len); | |
379 | struct hci_dev *hdev; | |
380 | struct amp_ctrl *ctrl; | |
381 | struct hci_conn *hcon; | |
382 | ||
383 | if (len < sizeof(*rsp)) | |
384 | return -EINVAL; | |
385 | ||
392f44d3 | 386 | BT_DBG("id %d status 0x%2.2x assoc len %lu", rsp->id, rsp->status, |
9a5e94db AE |
387 | len - sizeof(*rsp)); |
388 | ||
389 | if (rsp->status) | |
390 | return -EINVAL; | |
391 | ||
392 | /* Save remote ASSOC data */ | |
393 | ctrl = amp_ctrl_lookup(mgr, rsp->id); | |
394 | if (ctrl) { | |
395 | u8 *assoc, assoc_len = len - sizeof(*rsp); | |
396 | ||
397 | assoc = kzalloc(assoc_len, GFP_KERNEL); | |
398 | if (!assoc) { | |
399 | amp_ctrl_put(ctrl); | |
400 | return -ENOMEM; | |
401 | } | |
402 | ||
403 | memcpy(assoc, rsp->amp_assoc, assoc_len); | |
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 | ||
417 | hcon = phylink_add(hdev, mgr, rsp->id); | |
418 | if (!hcon) | |
419 | goto done; | |
420 | ||
421 | BT_DBG("Created hcon %p: loc:%d -> rem:%d", hcon, hdev->id, rsp->id); | |
422 | ||
9495b2ee AE |
423 | mgr->bredr_chan->ctrl_id = rsp->id; |
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); | |
452 | if (!hdev || hdev->amp_type != HCI_AMP) { | |
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) { | |
459 | ctrl = amp_ctrl_add(mgr); | |
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) { | |
469 | u8 *assoc, assoc_len = le16_to_cpu(hdr->len) - sizeof(*req); | |
470 | ||
471 | ctrl->id = rsp.remote_id; | |
472 | ||
473 | assoc = kzalloc(assoc_len, GFP_KERNEL); | |
474 | if (!assoc) { | |
475 | amp_ctrl_put(ctrl); | |
476 | return -ENOMEM; | |
477 | } | |
478 | ||
479 | memcpy(assoc, req->amp_assoc, assoc_len); | |
480 | ctrl->assoc = assoc; | |
481 | ctrl->assoc_len = assoc_len; | |
482 | ctrl->assoc_rem_len = assoc_len; | |
483 | ctrl->assoc_len_so_far = 0; | |
484 | ||
485 | amp_ctrl_put(ctrl); | |
486 | } | |
487 | ||
cb8488c0 AE |
488 | hcon = phylink_add(hdev, mgr, req->local_id); |
489 | if (hcon) { | |
dffa3871 | 490 | amp_accept_phylink(hdev, mgr, hcon); |
cb8488c0 AE |
491 | rsp.status = A2MP_STATUS_SUCCESS; |
492 | } else { | |
493 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
494 | } | |
e072f5da AE |
495 | |
496 | send_rsp: | |
497 | if (hdev) | |
498 | hci_dev_put(hdev); | |
499 | ||
500 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, sizeof(rsp), | |
501 | &rsp); | |
502 | ||
503 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
504 | return 0; | |
505 | } | |
506 | ||
6113f84f AE |
507 | static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
508 | struct a2mp_cmd *hdr) | |
509 | { | |
510 | struct a2mp_physlink_req *req = (void *) skb->data; | |
511 | struct a2mp_physlink_rsp rsp; | |
512 | struct hci_dev *hdev; | |
cb8488c0 | 513 | struct hci_conn *hcon; |
6113f84f AE |
514 | |
515 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
516 | return -EINVAL; | |
517 | ||
518 | BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id); | |
519 | ||
520 | rsp.local_id = req->remote_id; | |
521 | rsp.remote_id = req->local_id; | |
522 | rsp.status = A2MP_STATUS_SUCCESS; | |
523 | ||
cb8488c0 | 524 | hdev = hci_dev_get(req->remote_id); |
6113f84f AE |
525 | if (!hdev) { |
526 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
527 | goto send_rsp; | |
528 | } | |
529 | ||
cb8488c0 AE |
530 | hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, mgr->l2cap_conn->dst); |
531 | if (!hcon) { | |
532 | BT_ERR("No phys link exist"); | |
533 | rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS; | |
534 | goto clean; | |
535 | } | |
536 | ||
6113f84f AE |
537 | /* TODO Disconnect Phys Link here */ |
538 | ||
cb8488c0 | 539 | clean: |
6113f84f AE |
540 | hci_dev_put(hdev); |
541 | ||
542 | send_rsp: | |
543 | a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp); | |
544 | ||
545 | skb_pull(skb, sizeof(*req)); | |
546 | return 0; | |
547 | } | |
548 | ||
f6410a84 AE |
549 | static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
550 | struct a2mp_cmd *hdr) | |
551 | { | |
8e8c7e36 | 552 | BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code); |
f6410a84 AE |
553 | |
554 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
555 | return 0; | |
556 | } | |
557 | ||
6b44d9b8 AE |
558 | /* Handle A2MP signalling */ |
559 | static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) | |
560 | { | |
d9fc1d54 | 561 | struct a2mp_cmd *hdr; |
6b44d9b8 AE |
562 | struct amp_mgr *mgr = chan->data; |
563 | int err = 0; | |
564 | ||
565 | amp_mgr_get(mgr); | |
566 | ||
567 | while (skb->len >= sizeof(*hdr)) { | |
d9fc1d54 AE |
568 | u16 len; |
569 | ||
570 | hdr = (void *) skb->data; | |
571 | len = le16_to_cpu(hdr->len); | |
6b44d9b8 | 572 | |
8e8c7e36 | 573 | BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len); |
6b44d9b8 AE |
574 | |
575 | skb_pull(skb, sizeof(*hdr)); | |
576 | ||
577 | if (len > skb->len || !hdr->ident) { | |
578 | err = -EINVAL; | |
579 | break; | |
580 | } | |
581 | ||
582 | mgr->ident = hdr->ident; | |
583 | ||
584 | switch (hdr->code) { | |
585 | case A2MP_COMMAND_REJ: | |
21dbd2ce AE |
586 | a2mp_command_rej(mgr, skb, hdr); |
587 | break; | |
588 | ||
6b44d9b8 | 589 | case A2MP_DISCOVER_REQ: |
8598d064 AE |
590 | err = a2mp_discover_req(mgr, skb, hdr); |
591 | break; | |
592 | ||
6b44d9b8 | 593 | case A2MP_CHANGE_NOTIFY: |
329d81af AE |
594 | err = a2mp_change_notify(mgr, skb, hdr); |
595 | break; | |
596 | ||
6b44d9b8 | 597 | case A2MP_GETINFO_REQ: |
47f2d97d AE |
598 | err = a2mp_getinfo_req(mgr, skb, hdr); |
599 | break; | |
600 | ||
6b44d9b8 | 601 | case A2MP_GETAMPASSOC_REQ: |
a28381dc AE |
602 | err = a2mp_getampassoc_req(mgr, skb, hdr); |
603 | break; | |
604 | ||
6b44d9b8 | 605 | case A2MP_CREATEPHYSLINK_REQ: |
e072f5da AE |
606 | err = a2mp_createphyslink_req(mgr, skb, hdr); |
607 | break; | |
608 | ||
6b44d9b8 | 609 | case A2MP_DISCONNPHYSLINK_REQ: |
6113f84f AE |
610 | err = a2mp_discphyslink_req(mgr, skb, hdr); |
611 | break; | |
612 | ||
6b44d9b8 | 613 | case A2MP_DISCOVER_RSP: |
aa09537d AE |
614 | err = a2mp_discover_rsp(mgr, skb, hdr); |
615 | break; | |
616 | ||
6b44d9b8 | 617 | case A2MP_GETINFO_RSP: |
0d868de9 AE |
618 | err = a2mp_getinfo_rsp(mgr, skb, hdr); |
619 | break; | |
620 | ||
6b44d9b8 | 621 | case A2MP_GETAMPASSOC_RSP: |
9a5e94db AE |
622 | err = a2mp_getampassoc_rsp(mgr, skb, hdr); |
623 | break; | |
624 | ||
625 | case A2MP_CHANGE_RSP: | |
6b44d9b8 AE |
626 | case A2MP_CREATEPHYSLINK_RSP: |
627 | case A2MP_DISCONNPHYSLINK_RSP: | |
f6410a84 AE |
628 | err = a2mp_cmd_rsp(mgr, skb, hdr); |
629 | break; | |
630 | ||
6b44d9b8 AE |
631 | default: |
632 | BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code); | |
633 | err = -EINVAL; | |
634 | break; | |
635 | } | |
636 | } | |
637 | ||
638 | if (err) { | |
639 | struct a2mp_cmd_rej rej; | |
d9fc1d54 | 640 | |
6b44d9b8 | 641 | rej.reason = __constant_cpu_to_le16(0); |
d9fc1d54 | 642 | hdr = (void *) skb->data; |
6b44d9b8 AE |
643 | |
644 | BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err); | |
645 | ||
646 | a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej), | |
647 | &rej); | |
648 | } | |
649 | ||
650 | /* Always free skb and return success error code to prevent | |
651 | from sending L2CAP Disconnect over A2MP channel */ | |
652 | kfree_skb(skb); | |
653 | ||
654 | amp_mgr_put(mgr); | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
46d5c908 AE |
659 | static void a2mp_chan_close_cb(struct l2cap_chan *chan) |
660 | { | |
4af66c69 | 661 | l2cap_chan_put(chan); |
46d5c908 AE |
662 | } |
663 | ||
664 | static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state) | |
665 | { | |
666 | struct amp_mgr *mgr = chan->data; | |
667 | ||
668 | if (!mgr) | |
669 | return; | |
670 | ||
671 | BT_DBG("chan %p state %s", chan, state_to_string(state)); | |
672 | ||
673 | chan->state = state; | |
674 | ||
675 | switch (state) { | |
676 | case BT_CLOSED: | |
677 | if (mgr) | |
678 | amp_mgr_put(mgr); | |
679 | break; | |
680 | } | |
681 | } | |
682 | ||
683 | static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan, | |
684 | unsigned long len, int nb) | |
685 | { | |
686 | return bt_skb_alloc(len, GFP_KERNEL); | |
687 | } | |
688 | ||
466f8004 AE |
689 | static struct l2cap_ops a2mp_chan_ops = { |
690 | .name = "L2CAP A2MP channel", | |
6b44d9b8 | 691 | .recv = a2mp_chan_recv_cb, |
46d5c908 AE |
692 | .close = a2mp_chan_close_cb, |
693 | .state_change = a2mp_chan_state_change_cb, | |
694 | .alloc_skb = a2mp_chan_alloc_skb_cb, | |
695 | ||
696 | /* Not implemented for A2MP */ | |
7e1af8a3 GP |
697 | .new_connection = l2cap_chan_no_new_connection, |
698 | .teardown = l2cap_chan_no_teardown, | |
699 | .ready = l2cap_chan_no_ready, | |
466f8004 AE |
700 | }; |
701 | ||
93c3e8f5 | 702 | static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked) |
466f8004 AE |
703 | { |
704 | struct l2cap_chan *chan; | |
705 | int err; | |
706 | ||
707 | chan = l2cap_chan_create(); | |
708 | if (!chan) | |
709 | return NULL; | |
710 | ||
711 | BT_DBG("chan %p", chan); | |
712 | ||
416fa752 | 713 | chan->chan_type = L2CAP_CHAN_CONN_FIX_A2MP; |
466f8004 AE |
714 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
715 | ||
716 | chan->ops = &a2mp_chan_ops; | |
717 | ||
718 | l2cap_chan_set_defaults(chan); | |
719 | chan->remote_max_tx = chan->max_tx; | |
720 | chan->remote_tx_win = chan->tx_win; | |
721 | ||
722 | chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
723 | chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
724 | ||
725 | skb_queue_head_init(&chan->tx_q); | |
726 | ||
727 | chan->mode = L2CAP_MODE_ERTM; | |
728 | ||
729 | err = l2cap_ertm_init(chan); | |
730 | if (err < 0) { | |
731 | l2cap_chan_del(chan, 0); | |
732 | return NULL; | |
733 | } | |
734 | ||
735 | chan->conf_state = 0; | |
736 | ||
93c3e8f5 AE |
737 | if (locked) |
738 | __l2cap_chan_add(conn, chan); | |
739 | else | |
740 | l2cap_chan_add(conn, chan); | |
466f8004 AE |
741 | |
742 | chan->remote_mps = chan->omtu; | |
743 | chan->mps = chan->omtu; | |
744 | ||
745 | chan->state = BT_CONNECTED; | |
746 | ||
747 | return chan; | |
748 | } | |
9740e49d AE |
749 | |
750 | /* AMP Manager functions */ | |
751 | void amp_mgr_get(struct amp_mgr *mgr) | |
752 | { | |
a0dfe0ab | 753 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
754 | |
755 | kref_get(&mgr->kref); | |
756 | } | |
757 | ||
758 | static void amp_mgr_destroy(struct kref *kref) | |
759 | { | |
760 | struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref); | |
761 | ||
762 | BT_DBG("mgr %p", mgr); | |
763 | ||
f97268fc AE |
764 | mutex_lock(&_mgr_list_lock); |
765 | list_del(&mgr->list); | |
766 | mutex_unlock(&_mgr_list_lock); | |
767 | ||
52c0d6e5 | 768 | amp_ctrl_list_flush(mgr); |
9740e49d AE |
769 | kfree(mgr); |
770 | } | |
771 | ||
772 | int amp_mgr_put(struct amp_mgr *mgr) | |
773 | { | |
a0dfe0ab | 774 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
775 | |
776 | return kref_put(&mgr->kref, &_mgr_destroy); | |
777 | } | |
778 | ||
93c3e8f5 | 779 | static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked) |
9740e49d AE |
780 | { |
781 | struct amp_mgr *mgr; | |
782 | struct l2cap_chan *chan; | |
783 | ||
784 | mgr = kzalloc(sizeof(*mgr), GFP_KERNEL); | |
785 | if (!mgr) | |
786 | return NULL; | |
787 | ||
788 | BT_DBG("conn %p mgr %p", conn, mgr); | |
789 | ||
790 | mgr->l2cap_conn = conn; | |
791 | ||
93c3e8f5 | 792 | chan = a2mp_chan_open(conn, locked); |
9740e49d AE |
793 | if (!chan) { |
794 | kfree(mgr); | |
795 | return NULL; | |
796 | } | |
797 | ||
798 | mgr->a2mp_chan = chan; | |
799 | chan->data = mgr; | |
800 | ||
801 | conn->hcon->amp_mgr = mgr; | |
802 | ||
803 | kref_init(&mgr->kref); | |
804 | ||
52c0d6e5 AE |
805 | /* Remote AMP ctrl list initialization */ |
806 | INIT_LIST_HEAD(&mgr->amp_ctrls); | |
807 | mutex_init(&mgr->amp_ctrls_lock); | |
808 | ||
f97268fc AE |
809 | mutex_lock(&_mgr_list_lock); |
810 | list_add(&mgr->list, &_mgr_list); | |
811 | mutex_unlock(&_mgr_list_lock); | |
812 | ||
9740e49d AE |
813 | return mgr; |
814 | } | |
97e8e89d AE |
815 | |
816 | struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn, | |
817 | struct sk_buff *skb) | |
818 | { | |
819 | struct amp_mgr *mgr; | |
820 | ||
93c3e8f5 | 821 | mgr = amp_mgr_create(conn, false); |
97e8e89d AE |
822 | if (!mgr) { |
823 | BT_ERR("Could not create AMP manager"); | |
824 | return NULL; | |
825 | } | |
826 | ||
827 | BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan); | |
828 | ||
829 | return mgr->a2mp_chan; | |
830 | } | |
f97268fc AE |
831 | |
832 | struct amp_mgr *amp_mgr_lookup_by_state(u8 state) | |
833 | { | |
834 | struct amp_mgr *mgr; | |
835 | ||
836 | mutex_lock(&_mgr_list_lock); | |
837 | list_for_each_entry(mgr, &_mgr_list, list) { | |
838 | if (mgr->state == state) { | |
839 | amp_mgr_get(mgr); | |
840 | mutex_unlock(&_mgr_list_lock); | |
841 | return mgr; | |
842 | } | |
843 | } | |
844 | mutex_unlock(&_mgr_list_lock); | |
845 | ||
846 | return NULL; | |
847 | } | |
8e2a0d92 AE |
848 | |
849 | void a2mp_send_getinfo_rsp(struct hci_dev *hdev) | |
850 | { | |
851 | struct amp_mgr *mgr; | |
852 | struct a2mp_info_rsp rsp; | |
853 | ||
854 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO); | |
855 | if (!mgr) | |
856 | return; | |
857 | ||
858 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
859 | ||
860 | rsp.id = hdev->id; | |
861 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
862 | ||
863 | if (hdev->amp_type != HCI_BREDR) { | |
864 | rsp.status = 0; | |
865 | rsp.total_bw = cpu_to_le32(hdev->amp_total_bw); | |
866 | rsp.max_bw = cpu_to_le32(hdev->amp_max_bw); | |
867 | rsp.min_latency = cpu_to_le32(hdev->amp_min_latency); | |
868 | rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap); | |
869 | rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size); | |
870 | } | |
871 | ||
872 | a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp); | |
873 | amp_mgr_put(mgr); | |
874 | } | |
903e4541 AE |
875 | |
876 | void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status) | |
877 | { | |
878 | struct amp_mgr *mgr; | |
879 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
880 | struct a2mp_amp_assoc_rsp *rsp; | |
881 | size_t len; | |
882 | ||
883 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
884 | if (!mgr) | |
885 | return; | |
886 | ||
887 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
888 | ||
889 | len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len; | |
890 | rsp = kzalloc(len, GFP_KERNEL); | |
891 | if (!rsp) { | |
892 | amp_mgr_put(mgr); | |
893 | return; | |
894 | } | |
895 | ||
896 | rsp->id = hdev->id; | |
897 | ||
898 | if (status) { | |
899 | rsp->status = A2MP_STATUS_INVALID_CTRL_ID; | |
900 | } else { | |
901 | rsp->status = A2MP_STATUS_SUCCESS; | |
902 | memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len); | |
903 | } | |
904 | ||
905 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp); | |
906 | amp_mgr_put(mgr); | |
907 | kfree(rsp); | |
908 | } | |
93c3e8f5 | 909 | |
9495b2ee AE |
910 | void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status) |
911 | { | |
912 | struct amp_mgr *mgr; | |
913 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
914 | struct a2mp_physlink_req *req; | |
915 | struct l2cap_chan *bredr_chan; | |
916 | size_t len; | |
917 | ||
918 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL); | |
919 | if (!mgr) | |
920 | return; | |
921 | ||
922 | len = sizeof(*req) + loc_assoc->len; | |
923 | ||
924 | BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len); | |
925 | ||
926 | req = kzalloc(len, GFP_KERNEL); | |
927 | if (!req) { | |
928 | amp_mgr_put(mgr); | |
929 | return; | |
930 | } | |
931 | ||
932 | bredr_chan = mgr->bredr_chan; | |
933 | if (!bredr_chan) | |
934 | goto clean; | |
935 | ||
936 | req->local_id = hdev->id; | |
937 | req->remote_id = bredr_chan->ctrl_id; | |
938 | memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len); | |
939 | ||
940 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req); | |
941 | ||
942 | clean: | |
943 | amp_mgr_put(mgr); | |
944 | kfree(req); | |
945 | } | |
946 | ||
93c3e8f5 AE |
947 | void a2mp_discover_amp(struct l2cap_chan *chan) |
948 | { | |
949 | struct l2cap_conn *conn = chan->conn; | |
950 | struct amp_mgr *mgr = conn->hcon->amp_mgr; | |
951 | struct a2mp_discov_req req; | |
952 | ||
953 | BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr); | |
954 | ||
955 | if (!mgr) { | |
956 | mgr = amp_mgr_create(conn, true); | |
957 | if (!mgr) | |
958 | return; | |
959 | } | |
960 | ||
961 | mgr->bredr_chan = chan; | |
962 | ||
963 | req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); | |
964 | req.ext_feat = 0; | |
965 | a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req); | |
966 | } |