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Commit | Line | Data |
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466f8004 AE |
1 | /* |
2 | Copyright (c) 2010,2011 Code Aurora Forum. All rights reserved. | |
3 | Copyright (c) 2011,2012 Intel Corp. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License version 2 and | |
7 | only version 2 as published by the Free Software Foundation. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | */ | |
14 | ||
15 | #include <net/bluetooth/bluetooth.h> | |
16 | #include <net/bluetooth/hci_core.h> | |
17 | #include <net/bluetooth/l2cap.h> | |
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 | { | |
6ed971ca | 80 | cl->id = AMP_ID_BREDR; |
ece69126 | 81 | cl->type = AMP_TYPE_BREDR; |
536619e8 | 82 | cl->status = AMP_STATUS_BLUETOOTH_ONLY; |
8598d064 AE |
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 */ | |
23b9003b | 95 | if (hdev->dev_type != HCI_AMP) |
8598d064 AE |
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; | |
f822c411 | 132 | struct hci_dev *hdev; |
8598d064 AE |
133 | |
134 | if (len < sizeof(*req)) | |
135 | return -EINVAL; | |
136 | ||
137 | skb_pull(skb, sizeof(*req)); | |
138 | ||
139 | ext_feat = le16_to_cpu(req->ext_feat); | |
140 | ||
141 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat); | |
142 | ||
143 | /* check that packet is not broken for now */ | |
144 | while (ext_feat & A2MP_FEAT_EXT) { | |
145 | if (len < sizeof(ext_feat)) | |
146 | return -EINVAL; | |
147 | ||
148 | ext_feat = get_unaligned_le16(skb->data); | |
149 | BT_DBG("efm 0x%4.4x", ext_feat); | |
150 | len -= sizeof(ext_feat); | |
151 | skb_pull(skb, sizeof(ext_feat)); | |
152 | } | |
153 | ||
154 | read_lock(&hci_dev_list_lock); | |
155 | ||
f822c411 MH |
156 | /* at minimum the BR/EDR needs to be listed */ |
157 | num_ctrl = 1; | |
158 | ||
159 | list_for_each_entry(hdev, &hci_dev_list, list) { | |
160 | if (hdev->dev_type == HCI_AMP) | |
161 | num_ctrl++; | |
162 | } | |
163 | ||
8598d064 AE |
164 | len = num_ctrl * sizeof(struct a2mp_cl) + sizeof(*rsp); |
165 | rsp = kmalloc(len, GFP_ATOMIC); | |
166 | if (!rsp) { | |
167 | read_unlock(&hci_dev_list_lock); | |
168 | return -ENOMEM; | |
169 | } | |
170 | ||
171 | rsp->mtu = __constant_cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); | |
172 | rsp->ext_feat = 0; | |
173 | ||
174 | __a2mp_add_cl(mgr, rsp->cl, num_ctrl); | |
175 | ||
176 | read_unlock(&hci_dev_list_lock); | |
177 | ||
178 | a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp); | |
179 | ||
180 | kfree(rsp); | |
181 | return 0; | |
182 | } | |
183 | ||
aa09537d AE |
184 | static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
185 | struct a2mp_cmd *hdr) | |
186 | { | |
187 | struct a2mp_discov_rsp *rsp = (void *) skb->data; | |
188 | u16 len = le16_to_cpu(hdr->len); | |
189 | struct a2mp_cl *cl; | |
190 | u16 ext_feat; | |
2766be48 | 191 | bool found = false; |
aa09537d AE |
192 | |
193 | if (len < sizeof(*rsp)) | |
194 | return -EINVAL; | |
195 | ||
196 | len -= sizeof(*rsp); | |
197 | skb_pull(skb, sizeof(*rsp)); | |
198 | ||
199 | ext_feat = le16_to_cpu(rsp->ext_feat); | |
200 | ||
201 | BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat); | |
202 | ||
203 | /* check that packet is not broken for now */ | |
204 | while (ext_feat & A2MP_FEAT_EXT) { | |
205 | if (len < sizeof(ext_feat)) | |
206 | return -EINVAL; | |
207 | ||
208 | ext_feat = get_unaligned_le16(skb->data); | |
209 | BT_DBG("efm 0x%4.4x", ext_feat); | |
210 | len -= sizeof(ext_feat); | |
211 | skb_pull(skb, sizeof(ext_feat)); | |
212 | } | |
213 | ||
214 | cl = (void *) skb->data; | |
215 | while (len >= sizeof(*cl)) { | |
216 | BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type, | |
217 | cl->status); | |
218 | ||
6ed971ca | 219 | if (cl->id != AMP_ID_BREDR && cl->type == HCI_AMP) { |
aa09537d AE |
220 | struct a2mp_info_req req; |
221 | ||
2766be48 | 222 | found = true; |
aa09537d AE |
223 | req.id = cl->id; |
224 | a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr), | |
225 | sizeof(req), &req); | |
226 | } | |
227 | ||
228 | len -= sizeof(*cl); | |
229 | cl = (void *) skb_pull(skb, sizeof(*cl)); | |
230 | } | |
231 | ||
2766be48 AE |
232 | /* Fall back to L2CAP init sequence */ |
233 | if (!found) { | |
234 | struct l2cap_conn *conn = mgr->l2cap_conn; | |
235 | struct l2cap_chan *chan; | |
236 | ||
237 | mutex_lock(&conn->chan_lock); | |
238 | ||
239 | list_for_each_entry(chan, &conn->chan_l, list) { | |
240 | ||
241 | BT_DBG("chan %p state %s", chan, | |
242 | state_to_string(chan->state)); | |
243 | ||
244 | if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP) | |
245 | continue; | |
246 | ||
247 | l2cap_chan_lock(chan); | |
248 | ||
249 | if (chan->state == BT_CONNECT) | |
250 | l2cap_send_conn_req(chan); | |
251 | ||
252 | l2cap_chan_unlock(chan); | |
253 | } | |
254 | ||
255 | mutex_unlock(&conn->chan_lock); | |
256 | } | |
257 | ||
aa09537d AE |
258 | return 0; |
259 | } | |
260 | ||
329d81af AE |
261 | static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb, |
262 | struct a2mp_cmd *hdr) | |
263 | { | |
264 | struct a2mp_cl *cl = (void *) skb->data; | |
265 | ||
266 | while (skb->len >= sizeof(*cl)) { | |
267 | BT_DBG("Controller id %d type %d status %d", cl->id, cl->type, | |
268 | cl->status); | |
269 | cl = (struct a2mp_cl *) skb_pull(skb, sizeof(*cl)); | |
270 | } | |
271 | ||
272 | /* TODO send A2MP_CHANGE_RSP */ | |
273 | ||
274 | return 0; | |
275 | } | |
276 | ||
47f2d97d AE |
277 | static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb, |
278 | struct a2mp_cmd *hdr) | |
279 | { | |
280 | struct a2mp_info_req *req = (void *) skb->data; | |
47f2d97d AE |
281 | struct hci_dev *hdev; |
282 | ||
283 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
284 | return -EINVAL; | |
285 | ||
286 | BT_DBG("id %d", req->id); | |
287 | ||
47f2d97d | 288 | hdev = hci_dev_get(req->id); |
bc8dce4f | 289 | if (!hdev || hdev->dev_type != HCI_AMP) { |
8e2a0d92 AE |
290 | struct a2mp_info_rsp rsp; |
291 | ||
292 | rsp.id = req->id; | |
293 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
294 | ||
295 | a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp), | |
296 | &rsp); | |
47f2d97d | 297 | |
bc8dce4f | 298 | goto done; |
8e2a0d92 | 299 | } |
47f2d97d | 300 | |
cb6801c6 | 301 | set_bit(READ_LOC_AMP_INFO, &mgr->state); |
bc8dce4f AE |
302 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL); |
303 | ||
304 | done: | |
305 | if (hdev) | |
306 | hci_dev_put(hdev); | |
47f2d97d AE |
307 | |
308 | skb_pull(skb, sizeof(*req)); | |
309 | return 0; | |
310 | } | |
311 | ||
0d868de9 AE |
312 | static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
313 | struct a2mp_cmd *hdr) | |
314 | { | |
315 | struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data; | |
316 | struct a2mp_amp_assoc_req req; | |
317 | struct amp_ctrl *ctrl; | |
318 | ||
319 | if (le16_to_cpu(hdr->len) < sizeof(*rsp)) | |
320 | return -EINVAL; | |
321 | ||
322 | BT_DBG("id %d status 0x%2.2x", rsp->id, rsp->status); | |
323 | ||
324 | if (rsp->status) | |
325 | return -EINVAL; | |
326 | ||
fa4ebc66 | 327 | ctrl = amp_ctrl_add(mgr, rsp->id); |
0d868de9 AE |
328 | if (!ctrl) |
329 | return -ENOMEM; | |
330 | ||
0d868de9 AE |
331 | req.id = rsp->id; |
332 | a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req), | |
333 | &req); | |
334 | ||
335 | skb_pull(skb, sizeof(*rsp)); | |
336 | return 0; | |
337 | } | |
338 | ||
a28381dc AE |
339 | static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb, |
340 | struct a2mp_cmd *hdr) | |
341 | { | |
342 | struct a2mp_amp_assoc_req *req = (void *) skb->data; | |
343 | struct hci_dev *hdev; | |
903e4541 | 344 | struct amp_mgr *tmp; |
a28381dc AE |
345 | |
346 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
347 | return -EINVAL; | |
348 | ||
349 | BT_DBG("id %d", req->id); | |
350 | ||
903e4541 AE |
351 | /* Make sure that other request is not processed */ |
352 | tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
353 | ||
a28381dc | 354 | hdev = hci_dev_get(req->id); |
ece69126 | 355 | if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) { |
a28381dc AE |
356 | struct a2mp_amp_assoc_rsp rsp; |
357 | rsp.id = req->id; | |
903e4541 AE |
358 | |
359 | if (tmp) { | |
360 | rsp.status = A2MP_STATUS_COLLISION_OCCURED; | |
361 | amp_mgr_put(tmp); | |
362 | } else { | |
363 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
364 | } | |
a28381dc AE |
365 | |
366 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp), | |
367 | &rsp); | |
903e4541 AE |
368 | |
369 | goto done; | |
a28381dc AE |
370 | } |
371 | ||
903e4541 | 372 | amp_read_loc_assoc(hdev, mgr); |
a28381dc | 373 | |
903e4541 | 374 | done: |
a28381dc AE |
375 | if (hdev) |
376 | hci_dev_put(hdev); | |
377 | ||
378 | skb_pull(skb, sizeof(*req)); | |
379 | return 0; | |
380 | } | |
381 | ||
9a5e94db AE |
382 | static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
383 | struct a2mp_cmd *hdr) | |
384 | { | |
385 | struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data; | |
386 | u16 len = le16_to_cpu(hdr->len); | |
387 | struct hci_dev *hdev; | |
388 | struct amp_ctrl *ctrl; | |
389 | struct hci_conn *hcon; | |
13465c0a | 390 | size_t assoc_len; |
9a5e94db AE |
391 | |
392 | if (len < sizeof(*rsp)) | |
393 | return -EINVAL; | |
394 | ||
13465c0a AE |
395 | assoc_len = len - sizeof(*rsp); |
396 | ||
397 | BT_DBG("id %d status 0x%2.2x assoc len %zu", rsp->id, rsp->status, | |
398 | assoc_len); | |
9a5e94db AE |
399 | |
400 | if (rsp->status) | |
401 | return -EINVAL; | |
402 | ||
403 | /* Save remote ASSOC data */ | |
404 | ctrl = amp_ctrl_lookup(mgr, rsp->id); | |
405 | if (ctrl) { | |
13465c0a | 406 | u8 *assoc; |
9a5e94db | 407 | |
5ae327f0 | 408 | assoc = kmemdup(rsp->amp_assoc, assoc_len, GFP_KERNEL); |
9a5e94db AE |
409 | if (!assoc) { |
410 | amp_ctrl_put(ctrl); | |
411 | return -ENOMEM; | |
412 | } | |
413 | ||
9a5e94db AE |
414 | ctrl->assoc = assoc; |
415 | ctrl->assoc_len = assoc_len; | |
416 | ctrl->assoc_rem_len = assoc_len; | |
417 | ctrl->assoc_len_so_far = 0; | |
418 | ||
419 | amp_ctrl_put(ctrl); | |
420 | } | |
421 | ||
422 | /* Create Phys Link */ | |
423 | hdev = hci_dev_get(rsp->id); | |
424 | if (!hdev) | |
425 | return -EINVAL; | |
426 | ||
a0c234fe | 427 | hcon = phylink_add(hdev, mgr, rsp->id, true); |
9a5e94db AE |
428 | if (!hcon) |
429 | goto done; | |
430 | ||
431 | BT_DBG("Created hcon %p: loc:%d -> rem:%d", hcon, hdev->id, rsp->id); | |
432 | ||
fffadc08 | 433 | mgr->bredr_chan->remote_amp_id = rsp->id; |
9495b2ee | 434 | |
a02226d6 AE |
435 | amp_create_phylink(hdev, mgr, hcon); |
436 | ||
9a5e94db AE |
437 | done: |
438 | hci_dev_put(hdev); | |
439 | skb_pull(skb, len); | |
440 | return 0; | |
441 | } | |
442 | ||
e072f5da AE |
443 | static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
444 | struct a2mp_cmd *hdr) | |
445 | { | |
446 | struct a2mp_physlink_req *req = (void *) skb->data; | |
447 | ||
448 | struct a2mp_physlink_rsp rsp; | |
449 | struct hci_dev *hdev; | |
cb8488c0 | 450 | struct hci_conn *hcon; |
0b26ab9d | 451 | struct amp_ctrl *ctrl; |
e072f5da AE |
452 | |
453 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
454 | return -EINVAL; | |
455 | ||
456 | BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id); | |
457 | ||
458 | rsp.local_id = req->remote_id; | |
459 | rsp.remote_id = req->local_id; | |
460 | ||
461 | hdev = hci_dev_get(req->remote_id); | |
ece69126 | 462 | if (!hdev || hdev->amp_type == AMP_TYPE_BREDR) { |
e072f5da AE |
463 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; |
464 | goto send_rsp; | |
465 | } | |
466 | ||
0b26ab9d AE |
467 | ctrl = amp_ctrl_lookup(mgr, rsp.remote_id); |
468 | if (!ctrl) { | |
fa4ebc66 | 469 | ctrl = amp_ctrl_add(mgr, rsp.remote_id); |
0b26ab9d AE |
470 | if (ctrl) { |
471 | amp_ctrl_get(ctrl); | |
472 | } else { | |
473 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
474 | goto send_rsp; | |
475 | } | |
476 | } | |
477 | ||
478 | if (ctrl) { | |
13465c0a AE |
479 | size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req); |
480 | u8 *assoc; | |
0b26ab9d | 481 | |
5ae327f0 | 482 | assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL); |
0b26ab9d AE |
483 | if (!assoc) { |
484 | amp_ctrl_put(ctrl); | |
485 | return -ENOMEM; | |
486 | } | |
487 | ||
0b26ab9d AE |
488 | ctrl->assoc = assoc; |
489 | ctrl->assoc_len = assoc_len; | |
490 | ctrl->assoc_rem_len = assoc_len; | |
491 | ctrl->assoc_len_so_far = 0; | |
492 | ||
493 | amp_ctrl_put(ctrl); | |
494 | } | |
495 | ||
a0c234fe | 496 | hcon = phylink_add(hdev, mgr, req->local_id, false); |
cb8488c0 | 497 | if (hcon) { |
dffa3871 | 498 | amp_accept_phylink(hdev, mgr, hcon); |
cb8488c0 AE |
499 | rsp.status = A2MP_STATUS_SUCCESS; |
500 | } else { | |
501 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
502 | } | |
e072f5da AE |
503 | |
504 | send_rsp: | |
505 | if (hdev) | |
506 | hci_dev_put(hdev); | |
507 | ||
8e05e3ba AE |
508 | /* Reply error now and success after HCI Write Remote AMP Assoc |
509 | command complete with success status | |
510 | */ | |
511 | if (rsp.status != A2MP_STATUS_SUCCESS) { | |
512 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident, | |
513 | sizeof(rsp), &rsp); | |
514 | } else { | |
cb6801c6 | 515 | set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state); |
8e05e3ba AE |
516 | mgr->ident = hdr->ident; |
517 | } | |
e072f5da AE |
518 | |
519 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
520 | return 0; | |
521 | } | |
522 | ||
6113f84f AE |
523 | static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb, |
524 | struct a2mp_cmd *hdr) | |
525 | { | |
526 | struct a2mp_physlink_req *req = (void *) skb->data; | |
527 | struct a2mp_physlink_rsp rsp; | |
528 | struct hci_dev *hdev; | |
cb8488c0 | 529 | struct hci_conn *hcon; |
6113f84f AE |
530 | |
531 | if (le16_to_cpu(hdr->len) < sizeof(*req)) | |
532 | return -EINVAL; | |
533 | ||
534 | BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id); | |
535 | ||
536 | rsp.local_id = req->remote_id; | |
537 | rsp.remote_id = req->local_id; | |
538 | rsp.status = A2MP_STATUS_SUCCESS; | |
539 | ||
cb8488c0 | 540 | hdev = hci_dev_get(req->remote_id); |
6113f84f AE |
541 | if (!hdev) { |
542 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
543 | goto send_rsp; | |
544 | } | |
545 | ||
cb8488c0 AE |
546 | hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, mgr->l2cap_conn->dst); |
547 | if (!hcon) { | |
548 | BT_ERR("No phys link exist"); | |
549 | rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS; | |
550 | goto clean; | |
551 | } | |
552 | ||
6113f84f AE |
553 | /* TODO Disconnect Phys Link here */ |
554 | ||
cb8488c0 | 555 | clean: |
6113f84f AE |
556 | hci_dev_put(hdev); |
557 | ||
558 | send_rsp: | |
559 | a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp); | |
560 | ||
561 | skb_pull(skb, sizeof(*req)); | |
562 | return 0; | |
563 | } | |
564 | ||
f6410a84 AE |
565 | static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb, |
566 | struct a2mp_cmd *hdr) | |
567 | { | |
8e8c7e36 | 568 | BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code); |
f6410a84 AE |
569 | |
570 | skb_pull(skb, le16_to_cpu(hdr->len)); | |
571 | return 0; | |
572 | } | |
573 | ||
6b44d9b8 AE |
574 | /* Handle A2MP signalling */ |
575 | static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) | |
576 | { | |
d9fc1d54 | 577 | struct a2mp_cmd *hdr; |
6b44d9b8 AE |
578 | struct amp_mgr *mgr = chan->data; |
579 | int err = 0; | |
580 | ||
581 | amp_mgr_get(mgr); | |
582 | ||
583 | while (skb->len >= sizeof(*hdr)) { | |
d9fc1d54 AE |
584 | u16 len; |
585 | ||
586 | hdr = (void *) skb->data; | |
587 | len = le16_to_cpu(hdr->len); | |
6b44d9b8 | 588 | |
8e8c7e36 | 589 | BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len); |
6b44d9b8 AE |
590 | |
591 | skb_pull(skb, sizeof(*hdr)); | |
592 | ||
593 | if (len > skb->len || !hdr->ident) { | |
594 | err = -EINVAL; | |
595 | break; | |
596 | } | |
597 | ||
598 | mgr->ident = hdr->ident; | |
599 | ||
600 | switch (hdr->code) { | |
601 | case A2MP_COMMAND_REJ: | |
21dbd2ce AE |
602 | a2mp_command_rej(mgr, skb, hdr); |
603 | break; | |
604 | ||
6b44d9b8 | 605 | case A2MP_DISCOVER_REQ: |
8598d064 AE |
606 | err = a2mp_discover_req(mgr, skb, hdr); |
607 | break; | |
608 | ||
6b44d9b8 | 609 | case A2MP_CHANGE_NOTIFY: |
329d81af AE |
610 | err = a2mp_change_notify(mgr, skb, hdr); |
611 | break; | |
612 | ||
6b44d9b8 | 613 | case A2MP_GETINFO_REQ: |
47f2d97d AE |
614 | err = a2mp_getinfo_req(mgr, skb, hdr); |
615 | break; | |
616 | ||
6b44d9b8 | 617 | case A2MP_GETAMPASSOC_REQ: |
a28381dc AE |
618 | err = a2mp_getampassoc_req(mgr, skb, hdr); |
619 | break; | |
620 | ||
6b44d9b8 | 621 | case A2MP_CREATEPHYSLINK_REQ: |
e072f5da AE |
622 | err = a2mp_createphyslink_req(mgr, skb, hdr); |
623 | break; | |
624 | ||
6b44d9b8 | 625 | case A2MP_DISCONNPHYSLINK_REQ: |
6113f84f AE |
626 | err = a2mp_discphyslink_req(mgr, skb, hdr); |
627 | break; | |
628 | ||
6b44d9b8 | 629 | case A2MP_DISCOVER_RSP: |
aa09537d AE |
630 | err = a2mp_discover_rsp(mgr, skb, hdr); |
631 | break; | |
632 | ||
6b44d9b8 | 633 | case A2MP_GETINFO_RSP: |
0d868de9 AE |
634 | err = a2mp_getinfo_rsp(mgr, skb, hdr); |
635 | break; | |
636 | ||
6b44d9b8 | 637 | case A2MP_GETAMPASSOC_RSP: |
9a5e94db AE |
638 | err = a2mp_getampassoc_rsp(mgr, skb, hdr); |
639 | break; | |
640 | ||
641 | case A2MP_CHANGE_RSP: | |
6b44d9b8 AE |
642 | case A2MP_CREATEPHYSLINK_RSP: |
643 | case A2MP_DISCONNPHYSLINK_RSP: | |
f6410a84 AE |
644 | err = a2mp_cmd_rsp(mgr, skb, hdr); |
645 | break; | |
646 | ||
6b44d9b8 AE |
647 | default: |
648 | BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code); | |
649 | err = -EINVAL; | |
650 | break; | |
651 | } | |
652 | } | |
653 | ||
654 | if (err) { | |
655 | struct a2mp_cmd_rej rej; | |
d9fc1d54 | 656 | |
6b44d9b8 | 657 | rej.reason = __constant_cpu_to_le16(0); |
d9fc1d54 | 658 | hdr = (void *) skb->data; |
6b44d9b8 AE |
659 | |
660 | BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err); | |
661 | ||
662 | a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej), | |
663 | &rej); | |
664 | } | |
665 | ||
666 | /* Always free skb and return success error code to prevent | |
667 | from sending L2CAP Disconnect over A2MP channel */ | |
668 | kfree_skb(skb); | |
669 | ||
670 | amp_mgr_put(mgr); | |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
46d5c908 AE |
675 | static void a2mp_chan_close_cb(struct l2cap_chan *chan) |
676 | { | |
4af66c69 | 677 | l2cap_chan_put(chan); |
46d5c908 AE |
678 | } |
679 | ||
680 | static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state) | |
681 | { | |
682 | struct amp_mgr *mgr = chan->data; | |
683 | ||
684 | if (!mgr) | |
685 | return; | |
686 | ||
687 | BT_DBG("chan %p state %s", chan, state_to_string(state)); | |
688 | ||
689 | chan->state = state; | |
690 | ||
691 | switch (state) { | |
692 | case BT_CLOSED: | |
693 | if (mgr) | |
694 | amp_mgr_put(mgr); | |
695 | break; | |
696 | } | |
697 | } | |
698 | ||
699 | static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan, | |
700 | unsigned long len, int nb) | |
701 | { | |
702 | return bt_skb_alloc(len, GFP_KERNEL); | |
703 | } | |
704 | ||
466f8004 AE |
705 | static struct l2cap_ops a2mp_chan_ops = { |
706 | .name = "L2CAP A2MP channel", | |
6b44d9b8 | 707 | .recv = a2mp_chan_recv_cb, |
46d5c908 AE |
708 | .close = a2mp_chan_close_cb, |
709 | .state_change = a2mp_chan_state_change_cb, | |
710 | .alloc_skb = a2mp_chan_alloc_skb_cb, | |
711 | ||
712 | /* Not implemented for A2MP */ | |
7e1af8a3 GP |
713 | .new_connection = l2cap_chan_no_new_connection, |
714 | .teardown = l2cap_chan_no_teardown, | |
715 | .ready = l2cap_chan_no_ready, | |
2dc4e510 | 716 | .defer = l2cap_chan_no_defer, |
466f8004 AE |
717 | }; |
718 | ||
93c3e8f5 | 719 | static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked) |
466f8004 AE |
720 | { |
721 | struct l2cap_chan *chan; | |
722 | int err; | |
723 | ||
724 | chan = l2cap_chan_create(); | |
725 | if (!chan) | |
726 | return NULL; | |
727 | ||
728 | BT_DBG("chan %p", chan); | |
729 | ||
416fa752 | 730 | chan->chan_type = L2CAP_CHAN_CONN_FIX_A2MP; |
466f8004 AE |
731 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
732 | ||
733 | chan->ops = &a2mp_chan_ops; | |
734 | ||
735 | l2cap_chan_set_defaults(chan); | |
736 | chan->remote_max_tx = chan->max_tx; | |
737 | chan->remote_tx_win = chan->tx_win; | |
738 | ||
739 | chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; | |
740 | chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; | |
741 | ||
742 | skb_queue_head_init(&chan->tx_q); | |
743 | ||
744 | chan->mode = L2CAP_MODE_ERTM; | |
745 | ||
746 | err = l2cap_ertm_init(chan); | |
747 | if (err < 0) { | |
748 | l2cap_chan_del(chan, 0); | |
749 | return NULL; | |
750 | } | |
751 | ||
752 | chan->conf_state = 0; | |
753 | ||
93c3e8f5 AE |
754 | if (locked) |
755 | __l2cap_chan_add(conn, chan); | |
756 | else | |
757 | l2cap_chan_add(conn, chan); | |
466f8004 AE |
758 | |
759 | chan->remote_mps = chan->omtu; | |
760 | chan->mps = chan->omtu; | |
761 | ||
762 | chan->state = BT_CONNECTED; | |
763 | ||
764 | return chan; | |
765 | } | |
9740e49d AE |
766 | |
767 | /* AMP Manager functions */ | |
f706adfe | 768 | struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr) |
9740e49d | 769 | { |
a0dfe0ab | 770 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
771 | |
772 | kref_get(&mgr->kref); | |
f706adfe AE |
773 | |
774 | return mgr; | |
9740e49d AE |
775 | } |
776 | ||
777 | static void amp_mgr_destroy(struct kref *kref) | |
778 | { | |
779 | struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref); | |
780 | ||
781 | BT_DBG("mgr %p", mgr); | |
782 | ||
f97268fc AE |
783 | mutex_lock(&_mgr_list_lock); |
784 | list_del(&mgr->list); | |
785 | mutex_unlock(&_mgr_list_lock); | |
786 | ||
52c0d6e5 | 787 | amp_ctrl_list_flush(mgr); |
9740e49d AE |
788 | kfree(mgr); |
789 | } | |
790 | ||
791 | int amp_mgr_put(struct amp_mgr *mgr) | |
792 | { | |
a0dfe0ab | 793 | BT_DBG("mgr %p orig refcnt %d", mgr, atomic_read(&mgr->kref.refcount)); |
9740e49d AE |
794 | |
795 | return kref_put(&mgr->kref, &_mgr_destroy); | |
796 | } | |
797 | ||
93c3e8f5 | 798 | static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked) |
9740e49d AE |
799 | { |
800 | struct amp_mgr *mgr; | |
801 | struct l2cap_chan *chan; | |
802 | ||
803 | mgr = kzalloc(sizeof(*mgr), GFP_KERNEL); | |
804 | if (!mgr) | |
805 | return NULL; | |
806 | ||
807 | BT_DBG("conn %p mgr %p", conn, mgr); | |
808 | ||
809 | mgr->l2cap_conn = conn; | |
810 | ||
93c3e8f5 | 811 | chan = a2mp_chan_open(conn, locked); |
9740e49d AE |
812 | if (!chan) { |
813 | kfree(mgr); | |
814 | return NULL; | |
815 | } | |
816 | ||
817 | mgr->a2mp_chan = chan; | |
818 | chan->data = mgr; | |
819 | ||
820 | conn->hcon->amp_mgr = mgr; | |
821 | ||
822 | kref_init(&mgr->kref); | |
823 | ||
52c0d6e5 AE |
824 | /* Remote AMP ctrl list initialization */ |
825 | INIT_LIST_HEAD(&mgr->amp_ctrls); | |
826 | mutex_init(&mgr->amp_ctrls_lock); | |
827 | ||
f97268fc AE |
828 | mutex_lock(&_mgr_list_lock); |
829 | list_add(&mgr->list, &_mgr_list); | |
830 | mutex_unlock(&_mgr_list_lock); | |
831 | ||
9740e49d AE |
832 | return mgr; |
833 | } | |
97e8e89d AE |
834 | |
835 | struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn, | |
836 | struct sk_buff *skb) | |
837 | { | |
838 | struct amp_mgr *mgr; | |
839 | ||
93c3e8f5 | 840 | mgr = amp_mgr_create(conn, false); |
97e8e89d AE |
841 | if (!mgr) { |
842 | BT_ERR("Could not create AMP manager"); | |
843 | return NULL; | |
844 | } | |
845 | ||
846 | BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan); | |
847 | ||
848 | return mgr->a2mp_chan; | |
849 | } | |
f97268fc AE |
850 | |
851 | struct amp_mgr *amp_mgr_lookup_by_state(u8 state) | |
852 | { | |
853 | struct amp_mgr *mgr; | |
854 | ||
855 | mutex_lock(&_mgr_list_lock); | |
856 | list_for_each_entry(mgr, &_mgr_list, list) { | |
cb6801c6 | 857 | if (test_and_clear_bit(state, &mgr->state)) { |
f97268fc AE |
858 | amp_mgr_get(mgr); |
859 | mutex_unlock(&_mgr_list_lock); | |
860 | return mgr; | |
861 | } | |
862 | } | |
863 | mutex_unlock(&_mgr_list_lock); | |
864 | ||
865 | return NULL; | |
866 | } | |
8e2a0d92 AE |
867 | |
868 | void a2mp_send_getinfo_rsp(struct hci_dev *hdev) | |
869 | { | |
870 | struct amp_mgr *mgr; | |
871 | struct a2mp_info_rsp rsp; | |
872 | ||
873 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO); | |
874 | if (!mgr) | |
875 | return; | |
876 | ||
877 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
878 | ||
879 | rsp.id = hdev->id; | |
880 | rsp.status = A2MP_STATUS_INVALID_CTRL_ID; | |
881 | ||
ece69126 | 882 | if (hdev->amp_type != AMP_TYPE_BREDR) { |
8e2a0d92 AE |
883 | rsp.status = 0; |
884 | rsp.total_bw = cpu_to_le32(hdev->amp_total_bw); | |
885 | rsp.max_bw = cpu_to_le32(hdev->amp_max_bw); | |
886 | rsp.min_latency = cpu_to_le32(hdev->amp_min_latency); | |
887 | rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap); | |
888 | rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size); | |
889 | } | |
890 | ||
891 | a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp); | |
892 | amp_mgr_put(mgr); | |
893 | } | |
903e4541 AE |
894 | |
895 | void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status) | |
896 | { | |
897 | struct amp_mgr *mgr; | |
898 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
899 | struct a2mp_amp_assoc_rsp *rsp; | |
900 | size_t len; | |
901 | ||
902 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC); | |
903 | if (!mgr) | |
904 | return; | |
905 | ||
906 | BT_DBG("%s mgr %p", hdev->name, mgr); | |
907 | ||
908 | len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len; | |
909 | rsp = kzalloc(len, GFP_KERNEL); | |
910 | if (!rsp) { | |
911 | amp_mgr_put(mgr); | |
912 | return; | |
913 | } | |
914 | ||
915 | rsp->id = hdev->id; | |
916 | ||
917 | if (status) { | |
918 | rsp->status = A2MP_STATUS_INVALID_CTRL_ID; | |
919 | } else { | |
920 | rsp->status = A2MP_STATUS_SUCCESS; | |
921 | memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len); | |
922 | } | |
923 | ||
924 | a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp); | |
925 | amp_mgr_put(mgr); | |
926 | kfree(rsp); | |
927 | } | |
93c3e8f5 | 928 | |
9495b2ee AE |
929 | void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status) |
930 | { | |
931 | struct amp_mgr *mgr; | |
932 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; | |
933 | struct a2mp_physlink_req *req; | |
934 | struct l2cap_chan *bredr_chan; | |
935 | size_t len; | |
936 | ||
937 | mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL); | |
938 | if (!mgr) | |
939 | return; | |
940 | ||
941 | len = sizeof(*req) + loc_assoc->len; | |
942 | ||
943 | BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len); | |
944 | ||
945 | req = kzalloc(len, GFP_KERNEL); | |
946 | if (!req) { | |
947 | amp_mgr_put(mgr); | |
948 | return; | |
949 | } | |
950 | ||
951 | bredr_chan = mgr->bredr_chan; | |
952 | if (!bredr_chan) | |
953 | goto clean; | |
954 | ||
955 | req->local_id = hdev->id; | |
fffadc08 | 956 | req->remote_id = bredr_chan->remote_amp_id; |
9495b2ee AE |
957 | memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len); |
958 | ||
959 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req); | |
960 | ||
961 | clean: | |
962 | amp_mgr_put(mgr); | |
963 | kfree(req); | |
964 | } | |
965 | ||
8e05e3ba AE |
966 | void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status) |
967 | { | |
968 | struct amp_mgr *mgr; | |
969 | struct a2mp_physlink_rsp rsp; | |
970 | struct hci_conn *hs_hcon; | |
971 | ||
972 | mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC); | |
973 | if (!mgr) | |
974 | return; | |
975 | ||
976 | hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT); | |
977 | if (!hs_hcon) { | |
978 | rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION; | |
979 | } else { | |
980 | rsp.remote_id = hs_hcon->remote_id; | |
981 | rsp.status = A2MP_STATUS_SUCCESS; | |
982 | } | |
983 | ||
984 | BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon, | |
985 | status); | |
986 | ||
987 | rsp.local_id = hdev->id; | |
988 | a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp); | |
989 | amp_mgr_put(mgr); | |
990 | } | |
991 | ||
93c3e8f5 AE |
992 | void a2mp_discover_amp(struct l2cap_chan *chan) |
993 | { | |
994 | struct l2cap_conn *conn = chan->conn; | |
995 | struct amp_mgr *mgr = conn->hcon->amp_mgr; | |
996 | struct a2mp_discov_req req; | |
997 | ||
998 | BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr); | |
999 | ||
1000 | if (!mgr) { | |
1001 | mgr = amp_mgr_create(conn, true); | |
1002 | if (!mgr) | |
1003 | return; | |
1004 | } | |
1005 | ||
1006 | mgr->bredr_chan = chan; | |
1007 | ||
1008 | req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU); | |
1009 | req.ext_feat = 0; | |
1010 | a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req); | |
1011 | } |