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 | ||
aa09537d AE |
70 | static u8 __next_ident(struct amp_mgr *mgr) |
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 | ||
386 | BT_DBG("id %d status 0x%2.2x assoc len %u", rsp->id, rsp->status, | |
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 | ||
a02226d6 AE |
423 | amp_create_phylink(hdev, mgr, hcon); |
424 | ||
9a5e94db AE |
425 | done: |
426 | hci_dev_put(hdev); | |
427 | skb_pull(skb, len); | |
428 | return 0; | |
429 | } | |
430 | ||
e072f5da AE |
431 | static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
432 | struct a2mp_cmd *hdr) | |
433 | { | |
434 | struct a2mp_physlink_req *req = (void *) skb->data; | |
435 | ||
436 | struct a2mp_physlink_rsp rsp; | |
437 | struct hci_dev *hdev; | |
cb8488c0 | 438 | struct hci_conn *hcon; |
e072f5da AE |
439 | |
440 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
441 | return -EINVAL; | |
442 | ||
443 | BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id); | |
444 | ||
445 | rsp.local_id = req->remote_id; | |
446 | rsp.remote_id = req->local_id; | |
447 | ||
448 | hdev = hci_dev_get(req->remote_id); | |
449 | if (!hdev || hdev->amp_type != HCI_AMP) { | |
450 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
451 | goto send_rsp; | |
452 | } | |
453 | ||
454 | /* TODO process physlink create */ | |
455 | ||
cb8488c0 AE |
456 | hcon = phylink_add(hdev, mgr, req->local_id); |
457 | if (hcon) { | |
458 | BT_DBG("hcon %p", hcon); | |
459 | ||
460 | rsp.status = A2MP_STATUS_SUCCESS; | |
461 | } else { | |
462 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
463 | } | |
e072f5da AE |
464 | |
465 | send_rsp: | |
466 | if (hdev) | |
467 | hci_dev_put(hdev); | |
468 | ||
469 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, sizeof(rsp), | |
470 | &rsp); | |
471 | ||
472 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
473 | return 0; | |
474 | } | |
475 | ||
6113f84f AE |
476 | static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
477 | struct a2mp_cmd *hdr) | |
478 | { | |
479 | struct a2mp_physlink_req *req = (void *) skb->data; | |
480 | struct a2mp_physlink_rsp rsp; | |
481 | struct hci_dev *hdev; | |
cb8488c0 | 482 | struct hci_conn *hcon; |
6113f84f AE |
483 | |
484 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
485 | return -EINVAL; | |
486 | ||
487 | BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id); | |
488 | ||
489 | rsp.local_id = req->remote_id; | |
490 | rsp.remote_id = req->local_id; | |
491 | rsp.status = A2MP_STATUS_SUCCESS; | |
492 | ||
cb8488c0 | 493 | hdev = hci_dev_get(req->remote_id); |
6113f84f AE |
494 | if (!hdev) { |
495 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
496 | goto send_rsp; | |
497 | } | |
498 | ||
cb8488c0 AE |
499 | hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, mgr->l2cap_conn->dst); |
500 | if (!hcon) { | |
501 | BT_ERR("No phys link exist"); | |
502 | rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS; | |
503 | goto clean; | |
504 | } | |
505 | ||
6113f84f AE |
506 | /* TODO Disconnect Phys Link here */ |
507 | ||
cb8488c0 | 508 | clean: |
6113f84f AE |
509 | hci_dev_put(hdev); |
510 | ||
511 | send_rsp: | |
512 | a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp); | |
513 | ||
514 | skb_pull(skb, sizeof(*req)); | |
515 | return 0; | |
516 | } | |
517 | ||
f6410a84 AE |
518 | static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
519 | struct a2mp_cmd *hdr) | |
520 | { | |
8e8c7e36 | 521 | BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code); |
f6410a84 AE |
522 | |
523 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
524 | return 0; | |
525 | } | |
526 | ||
6b44d9b8 AE |
527 | /* Handle A2MP signalling */ |
528 | static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) | |
529 | { | |
d9fc1d54 | 530 | struct a2mp_cmd *hdr; |
6b44d9b8 AE |
531 | struct amp_mgr *mgr = chan->data; |
532 | int err = 0; | |
533 | ||
534 | amp_mgr_get(mgr); | |
535 | ||
536 | while (skb->len >= sizeof(*hdr)) { | |
d9fc1d54 AE |
537 | u16 len; |
538 | ||
539 | hdr = (void *) skb->data; | |
540 | len = le16_to_cpu(hdr->len); | |
6b44d9b8 | 541 | |
8e8c7e36 | 542 | BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len); |
6b44d9b8 AE |
543 | |
544 | skb_pull(skb, sizeof(*hdr)); | |
545 | ||
546 | if (len > skb->len || !hdr->ident) { | |
547 | err = -EINVAL; | |
548 | break; | |
549 | } | |
550 | ||
551 | mgr->ident = hdr->ident; | |
552 | ||
553 | switch (hdr->code) { | |
554 | case A2MP_COMMAND_REJ: | |
21dbd2ce AE |
555 | a2mp_command_rej(mgr, skb, hdr); |
556 | break; | |
557 | ||
6b44d9b8 | 558 | case A2MP_DISCOVER_REQ: |
8598d064 AE |
559 | err = a2mp_discover_req(mgr, skb, hdr); |
560 | break; | |
561 | ||
6b44d9b8 | 562 | case A2MP_CHANGE_NOTIFY: |
329d81af AE |
563 | err = a2mp_change_notify(mgr, skb, hdr); |
564 | break; | |
565 | ||
6b44d9b8 | 566 | case A2MP_GETINFO_REQ: |
47f2d97d AE |
567 | err = a2mp_getinfo_req(mgr, skb, hdr); |
568 | break; | |
569 | ||
6b44d9b8 | 570 | case A2MP_GETAMPASSOC_REQ: |
a28381dc AE |
571 | err = a2mp_getampassoc_req(mgr, skb, hdr); |
572 | break; | |
573 | ||
6b44d9b8 | 574 | case A2MP_CREATEPHYSLINK_REQ: |
e072f5da AE |
575 | err = a2mp_createphyslink_req(mgr, skb, hdr); |
576 | break; | |
577 | ||
6b44d9b8 | 578 | case A2MP_DISCONNPHYSLINK_REQ: |
6113f84f AE |
579 | err = a2mp_discphyslink_req(mgr, skb, hdr); |
580 | break; | |
581 | ||
6b44d9b8 | 582 | case A2MP_DISCOVER_RSP: |
aa09537d AE |
583 | err = a2mp_discover_rsp(mgr, skb, hdr); |
584 | break; | |
585 | ||
6b44d9b8 | 586 | case A2MP_GETINFO_RSP: |
0d868de9 AE |
587 | err = a2mp_getinfo_rsp(mgr, skb, hdr); |
588 | break; | |
589 | ||
6b44d9b8 | 590 | case A2MP_GETAMPASSOC_RSP: |
9a5e94db AE |
591 | err = a2mp_getampassoc_rsp(mgr, skb, hdr); |
592 | break; | |
593 | ||
594 | case A2MP_CHANGE_RSP: | |
6b44d9b8 AE |
595 | case A2MP_CREATEPHYSLINK_RSP: |
596 | case A2MP_DISCONNPHYSLINK_RSP: | |
f6410a84 AE |
597 | err = a2mp_cmd_rsp(mgr, skb, hdr); |
598 | break; | |
599 | ||
6b44d9b8 AE |
600 | default: |
601 | BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code); | |
602 | err = -EINVAL; | |
603 | break; | |
604 | } | |
605 | } | |
606 | ||
607 | if (err) { | |
608 | struct a2mp_cmd_rej rej; | |
d9fc1d54 | 609 | |
6b44d9b8 | 610 | rej.reason = __constant_cpu_to_le16(0); |
d9fc1d54 | 611 | hdr = (void *) skb->data; |
6b44d9b8 AE |
612 | |
613 | BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err); | |
614 | ||
615 | a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej), | |
616 | &rej); | |
617 | } | |
618 | ||
619 | /* Always free skb and return success error code to prevent | |
620 | from sending L2CAP Disconnect over A2MP channel */ | |
621 | kfree_skb(skb); | |
622 | ||
623 | amp_mgr_put(mgr); | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
46d5c908 AE |
628 | static void a2mp_chan_close_cb(struct l2cap_chan *chan) |
629 | { | |
4af66c69 | 630 | l2cap_chan_put(chan); |
46d5c908 AE |
631 | } |
632 | ||
633 | static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state) | |
634 | { | |
635 | struct amp_mgr *mgr = chan->data; | |
636 | ||
637 | if (!mgr) | |
638 | return; | |
639 | ||
640 | BT_DBG("chan %p state %s", chan, state_to_string(state)); | |
641 | ||
642 | chan->state = state; | |
643 | ||
644 | switch (state) { | |
645 | case BT_CLOSED: | |
646 | if (mgr) | |
647 | amp_mgr_put(mgr); | |
648 | break; | |
649 | } | |
650 | } | |
651 | ||
652 | static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan, | |
653 | unsigned long len, int nb) | |
654 | { | |
655 | return bt_skb_alloc(len, GFP_KERNEL); | |
656 | } | |
657 | ||
466f8004 AE |
658 | static struct l2cap_ops a2mp_chan_ops = { |
659 | .name = "L2CAP A2MP channel", | |
6b44d9b8 | 660 | .recv = a2mp_chan_recv_cb, |
46d5c908 AE |
661 | .close = a2mp_chan_close_cb, |
662 | .state_change = a2mp_chan_state_change_cb, | |
663 | .alloc_skb = a2mp_chan_alloc_skb_cb, | |
664 | ||
665 | /* Not implemented for A2MP */ | |
7e1af8a3 GP |
666 | .new_connection = l2cap_chan_no_new_connection, |
667 | .teardown = l2cap_chan_no_teardown, | |
668 | .ready = l2cap_chan_no_ready, | |
466f8004 AE |
669 | }; |
670 | ||
93c3e8f5 | 671 | static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked) |
466f8004 AE |
672 | { |
673 | struct l2cap_chan *chan; | |
674 | int err; | |
675 | ||
676 | chan = l2cap_chan_create(); | |
677 | if (!chan) | |
678 | return NULL; | |
679 | ||
680 | BT_DBG("chan %p", chan); | |
681 | ||
416fa752 | 682 | chan->chan_type = L2CAP_CHAN_CONN_FIX_A2MP; |
466f8004 AE |
683 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
684 | ||
685 | chan->ops = &a2mp_chan_ops; | |
686 | ||
687 | l2cap_chan_set_defaults(chan); | |
688 | chan->remote_max_tx = chan->max_tx; | |
689 | chan->remote_tx_win = chan->tx_win; | |
690 | ||
691 | chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
692 | chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
693 | ||
694 | skb_queue_head_init(&chan->tx_q); | |
695 | ||
696 | chan->mode = L2CAP_MODE_ERTM; | |
697 | ||
698 | err = l2cap_ertm_init(chan); | |
699 | if (err < 0) { | |
700 | l2cap_chan_del(chan, 0); | |
701 | return NULL; | |
702 | } | |
703 | ||
704 | chan->conf_state = 0; | |
705 | ||
93c3e8f5 AE |
706 | if (locked) |
707 | __l2cap_chan_add(conn, chan); | |
708 | else | |
709 | l2cap_chan_add(conn, chan); | |
466f8004 AE |
710 | |
711 | chan->remote_mps = chan->omtu; | |
712 | chan->mps = chan->omtu; | |
713 | ||
714 | chan->state = BT_CONNECTED; | |
715 | ||
716 | return chan; | |
717 | } | |
9740e49d AE |
718 | |
719 | /* AMP Manager functions */ | |
720 | void amp_mgr_get(struct amp_mgr *mgr) | |
721 | { | |
a0dfe0ab | 722 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
723 | |
724 | kref_get(&mgr->kref); | |
725 | } | |
726 | ||
727 | static void amp_mgr_destroy(struct kref *kref) | |
728 | { | |
729 | struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref); | |
730 | ||
731 | BT_DBG("mgr %p", mgr); | |
732 | ||
f97268fc AE |
733 | mutex_lock(&_mgr_list_lock); |
734 | list_del(&mgr->list); | |
735 | mutex_unlock(&_mgr_list_lock); | |
736 | ||
52c0d6e5 | 737 | amp_ctrl_list_flush(mgr); |
9740e49d AE |
738 | kfree(mgr); |
739 | } | |
740 | ||
741 | int amp_mgr_put(struct amp_mgr *mgr) | |
742 | { | |
a0dfe0ab | 743 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
744 | |
745 | return kref_put(&mgr->kref, &_mgr_destroy); | |
746 | } | |
747 | ||
93c3e8f5 | 748 | static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked) |
9740e49d AE |
749 | { |
750 | struct amp_mgr *mgr; | |
751 | struct l2cap_chan *chan; | |
752 | ||
753 | mgr = kzalloc(sizeof(*mgr), GFP_KERNEL); | |
754 | if (!mgr) | |
755 | return NULL; | |
756 | ||
757 | BT_DBG("conn %p mgr %p", conn, mgr); | |
758 | ||
759 | mgr->l2cap_conn = conn; | |
760 | ||
93c3e8f5 | 761 | chan = a2mp_chan_open(conn, locked); |
9740e49d AE |
762 | if (!chan) { |
763 | kfree(mgr); | |
764 | return NULL; | |
765 | } | |
766 | ||
767 | mgr->a2mp_chan = chan; | |
768 | chan->data = mgr; | |
769 | ||
770 | conn->hcon->amp_mgr = mgr; | |
771 | ||
772 | kref_init(&mgr->kref); | |
773 | ||
52c0d6e5 AE |
774 | /* Remote AMP ctrl list initialization */ |
775 | INIT_LIST_HEAD(&mgr->amp_ctrls); | |
776 | mutex_init(&mgr->amp_ctrls_lock); | |
777 | ||
f97268fc AE |
778 | mutex_lock(&_mgr_list_lock); |
779 | list_add(&mgr->list, &_mgr_list); | |
780 | mutex_unlock(&_mgr_list_lock); | |
781 | ||
9740e49d AE |
782 | return mgr; |
783 | } | |
97e8e89d AE |
784 | |
785 | struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn, | |
786 | struct sk_buff *skb) | |
787 | { | |
788 | struct amp_mgr *mgr; | |
789 | ||
93c3e8f5 | 790 | mgr = amp_mgr_create(conn, false); |
97e8e89d AE |
791 | if (!mgr) { |
792 | BT_ERR("Could not create AMP manager"); | |
793 | return NULL; | |
794 | } | |
795 | ||
796 | BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan); | |
797 | ||
798 | return mgr->a2mp_chan; | |
799 | } | |
f97268fc AE |
800 | |
801 | struct amp_mgr *amp_mgr_lookup_by_state(u8 state) | |
802 | { | |
803 | struct amp_mgr *mgr; | |
804 | ||
805 | mutex_lock(&_mgr_list_lock); | |
806 | list_for_each_entry(mgr, &_mgr_list, list) { | |
807 | if (mgr->state == state) { | |
808 | amp_mgr_get(mgr); | |
809 | mutex_unlock(&_mgr_list_lock); | |
810 | return mgr; | |
811 | } | |
812 | } | |
813 | mutex_unlock(&_mgr_list_lock); | |
814 | ||
815 | return NULL; | |
816 | } | |
8e2a0d92 AE |
817 | |
818 | void a2mp_send_getinfo_rsp(struct hci_dev *hdev) | |
819 | { | |
820 | struct amp_mgr *mgr; | |
821 | struct a2mp_info_rsp rsp; | |
822 | ||
823 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO); | |
824 | if (!mgr) | |
825 | return; | |
826 | ||
827 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
828 | ||
829 | rsp.id = hdev->id; | |
830 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
831 | ||
832 | if (hdev->amp_type != HCI_BREDR) { | |
833 | rsp.status = 0; | |
834 | rsp.total_bw = cpu_to_le32(hdev->amp_total_bw); | |
835 | rsp.max_bw = cpu_to_le32(hdev->amp_max_bw); | |
836 | rsp.min_latency = cpu_to_le32(hdev->amp_min_latency); | |
837 | rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap); | |
838 | rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size); | |
839 | } | |
840 | ||
841 | a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp); | |
842 | amp_mgr_put(mgr); | |
843 | } | |
903e4541 AE |
844 | |
845 | void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status) | |
846 | { | |
847 | struct amp_mgr *mgr; | |
848 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
849 | struct a2mp_amp_assoc_rsp *rsp; | |
850 | size_t len; | |
851 | ||
852 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
853 | if (!mgr) | |
854 | return; | |
855 | ||
856 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
857 | ||
858 | len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len; | |
859 | rsp = kzalloc(len, GFP_KERNEL); | |
860 | if (!rsp) { | |
861 | amp_mgr_put(mgr); | |
862 | return; | |
863 | } | |
864 | ||
865 | rsp->id = hdev->id; | |
866 | ||
867 | if (status) { | |
868 | rsp->status = A2MP_STATUS_INVALID_CTRL_ID; | |
869 | } else { | |
870 | rsp->status = A2MP_STATUS_SUCCESS; | |
871 | memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len); | |
872 | } | |
873 | ||
874 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp); | |
875 | amp_mgr_put(mgr); | |
876 | kfree(rsp); | |
877 | } | |
93c3e8f5 AE |
878 | |
879 | void a2mp_discover_amp(struct l2cap_chan *chan) | |
880 | { | |
881 | struct l2cap_conn *conn = chan->conn; | |
882 | struct amp_mgr *mgr = conn->hcon->amp_mgr; | |
883 | struct a2mp_discov_req req; | |
884 | ||
885 | BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr); | |
886 | ||
887 | if (!mgr) { | |
888 | mgr = amp_mgr_create(conn, true); | |
889 | if (!mgr) | |
890 | return; | |
891 | } | |
892 | ||
893 | mgr->bredr_chan = chan; | |
894 | ||
895 | req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); | |
896 | req.ext_feat = 0; | |
897 | a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req); | |
898 | } |