Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
590051de | 4 | Copyright (C) 2011 ProFUSION Embedded Systems |
1da177e4 LT |
5 | |
6 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License version 2 as | |
10 | published by the Free Software Foundation; | |
11 | ||
12 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
13 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
14 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
15 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
16 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
17 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
18 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
19 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
20 | ||
8e87d142 YH |
21 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
22 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
23 | SOFTWARE IS DISCLAIMED. |
24 | */ | |
25 | ||
26 | /* Bluetooth HCI core. */ | |
27 | ||
82453021 | 28 | #include <linux/jiffies.h> |
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/kmod.h> | |
31 | ||
32 | #include <linux/types.h> | |
33 | #include <linux/errno.h> | |
34 | #include <linux/kernel.h> | |
1da177e4 LT |
35 | #include <linux/sched.h> |
36 | #include <linux/slab.h> | |
37 | #include <linux/poll.h> | |
38 | #include <linux/fcntl.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/skbuff.h> | |
f48fd9c8 | 41 | #include <linux/workqueue.h> |
1da177e4 | 42 | #include <linux/interrupt.h> |
611b30f7 | 43 | #include <linux/rfkill.h> |
6bd32326 | 44 | #include <linux/timer.h> |
3a0259bb | 45 | #include <linux/crypto.h> |
1da177e4 LT |
46 | #include <net/sock.h> |
47 | ||
70f23020 | 48 | #include <linux/uaccess.h> |
1da177e4 LT |
49 | #include <asm/unaligned.h> |
50 | ||
51 | #include <net/bluetooth/bluetooth.h> | |
52 | #include <net/bluetooth/hci_core.h> | |
53 | ||
ab81cbf9 JH |
54 | #define AUTO_OFF_TIMEOUT 2000 |
55 | ||
b78752cc | 56 | static void hci_rx_work(struct work_struct *work); |
c347b765 | 57 | static void hci_cmd_work(struct work_struct *work); |
3eff45ea | 58 | static void hci_tx_work(struct work_struct *work); |
1da177e4 | 59 | |
1da177e4 LT |
60 | /* HCI device list */ |
61 | LIST_HEAD(hci_dev_list); | |
62 | DEFINE_RWLOCK(hci_dev_list_lock); | |
63 | ||
64 | /* HCI callback list */ | |
65 | LIST_HEAD(hci_cb_list); | |
66 | DEFINE_RWLOCK(hci_cb_list_lock); | |
67 | ||
1da177e4 LT |
68 | /* ---- HCI notifications ---- */ |
69 | ||
6516455d | 70 | static void hci_notify(struct hci_dev *hdev, int event) |
1da177e4 | 71 | { |
040030ef | 72 | hci_sock_dev_event(hdev, event); |
1da177e4 LT |
73 | } |
74 | ||
75 | /* ---- HCI requests ---- */ | |
76 | ||
23bb5763 | 77 | void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result) |
1da177e4 | 78 | { |
23bb5763 JH |
79 | BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result); |
80 | ||
a5040efa JH |
81 | /* If this is the init phase check if the completed command matches |
82 | * the last init command, and if not just return. | |
83 | */ | |
75fb0e32 JH |
84 | if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) { |
85 | struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data; | |
86 | struct sk_buff *skb; | |
87 | ||
88 | /* Some CSR based controllers generate a spontaneous | |
89 | * reset complete event during init and any pending | |
90 | * command will never be completed. In such a case we | |
91 | * need to resend whatever was the last sent | |
92 | * command. | |
93 | */ | |
94 | ||
95 | if (cmd != HCI_OP_RESET || sent->opcode == HCI_OP_RESET) | |
96 | return; | |
97 | ||
98 | skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC); | |
99 | if (skb) { | |
100 | skb_queue_head(&hdev->cmd_q, skb); | |
101 | queue_work(hdev->workqueue, &hdev->cmd_work); | |
102 | } | |
103 | ||
23bb5763 | 104 | return; |
75fb0e32 | 105 | } |
1da177e4 LT |
106 | |
107 | if (hdev->req_status == HCI_REQ_PEND) { | |
108 | hdev->req_result = result; | |
109 | hdev->req_status = HCI_REQ_DONE; | |
110 | wake_up_interruptible(&hdev->req_wait_q); | |
111 | } | |
112 | } | |
113 | ||
114 | static void hci_req_cancel(struct hci_dev *hdev, int err) | |
115 | { | |
116 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
117 | ||
118 | if (hdev->req_status == HCI_REQ_PEND) { | |
119 | hdev->req_result = err; | |
120 | hdev->req_status = HCI_REQ_CANCELED; | |
121 | wake_up_interruptible(&hdev->req_wait_q); | |
122 | } | |
123 | } | |
124 | ||
125 | /* Execute request and wait for completion. */ | |
8e87d142 | 126 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
01df8c31 | 127 | unsigned long opt, __u32 timeout) |
1da177e4 LT |
128 | { |
129 | DECLARE_WAITQUEUE(wait, current); | |
130 | int err = 0; | |
131 | ||
132 | BT_DBG("%s start", hdev->name); | |
133 | ||
134 | hdev->req_status = HCI_REQ_PEND; | |
135 | ||
136 | add_wait_queue(&hdev->req_wait_q, &wait); | |
137 | set_current_state(TASK_INTERRUPTIBLE); | |
138 | ||
139 | req(hdev, opt); | |
140 | schedule_timeout(timeout); | |
141 | ||
142 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
143 | ||
144 | if (signal_pending(current)) | |
145 | return -EINTR; | |
146 | ||
147 | switch (hdev->req_status) { | |
148 | case HCI_REQ_DONE: | |
e175072f | 149 | err = -bt_to_errno(hdev->req_result); |
1da177e4 LT |
150 | break; |
151 | ||
152 | case HCI_REQ_CANCELED: | |
153 | err = -hdev->req_result; | |
154 | break; | |
155 | ||
156 | default: | |
157 | err = -ETIMEDOUT; | |
158 | break; | |
3ff50b79 | 159 | } |
1da177e4 | 160 | |
a5040efa | 161 | hdev->req_status = hdev->req_result = 0; |
1da177e4 LT |
162 | |
163 | BT_DBG("%s end: err %d", hdev->name, err); | |
164 | ||
165 | return err; | |
166 | } | |
167 | ||
168 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), | |
01df8c31 | 169 | unsigned long opt, __u32 timeout) |
1da177e4 LT |
170 | { |
171 | int ret; | |
172 | ||
7c6a329e MH |
173 | if (!test_bit(HCI_UP, &hdev->flags)) |
174 | return -ENETDOWN; | |
175 | ||
1da177e4 LT |
176 | /* Serialize all requests */ |
177 | hci_req_lock(hdev); | |
178 | ret = __hci_request(hdev, req, opt, timeout); | |
179 | hci_req_unlock(hdev); | |
180 | ||
181 | return ret; | |
182 | } | |
183 | ||
184 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) | |
185 | { | |
186 | BT_DBG("%s %ld", hdev->name, opt); | |
187 | ||
188 | /* Reset device */ | |
f630cf0d | 189 | set_bit(HCI_RESET, &hdev->flags); |
a9de9248 | 190 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
191 | } |
192 | ||
e61ef499 | 193 | static void bredr_init(struct hci_dev *hdev) |
1da177e4 | 194 | { |
b0916ea0 | 195 | struct hci_cp_delete_stored_link_key cp; |
1ebb9252 | 196 | __le16 param; |
89f2783d | 197 | __u8 flt_type; |
1da177e4 | 198 | |
2455a3ea AE |
199 | hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED; |
200 | ||
1da177e4 LT |
201 | /* Mandatory initialization */ |
202 | ||
203 | /* Reset */ | |
f630cf0d | 204 | if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) { |
e61ef499 AE |
205 | set_bit(HCI_RESET, &hdev->flags); |
206 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); | |
f630cf0d | 207 | } |
1da177e4 LT |
208 | |
209 | /* Read Local Supported Features */ | |
a9de9248 | 210 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
1da177e4 | 211 | |
1143e5a6 | 212 | /* Read Local Version */ |
a9de9248 | 213 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
1143e5a6 | 214 | |
1da177e4 | 215 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
a9de9248 | 216 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
1da177e4 | 217 | |
1da177e4 | 218 | /* Read BD Address */ |
a9de9248 MH |
219 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
220 | ||
221 | /* Read Class of Device */ | |
222 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); | |
223 | ||
224 | /* Read Local Name */ | |
225 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); | |
1da177e4 LT |
226 | |
227 | /* Read Voice Setting */ | |
a9de9248 | 228 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
1da177e4 LT |
229 | |
230 | /* Optional initialization */ | |
231 | ||
232 | /* Clear Event Filters */ | |
89f2783d | 233 | flt_type = HCI_FLT_CLEAR_ALL; |
a9de9248 | 234 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
1da177e4 | 235 | |
1da177e4 | 236 | /* Connection accept timeout ~20 secs */ |
aca3192c | 237 | param = cpu_to_le16(0x7d00); |
a9de9248 | 238 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
b0916ea0 JH |
239 | |
240 | bacpy(&cp.bdaddr, BDADDR_ANY); | |
241 | cp.delete_all = 1; | |
242 | hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp); | |
1da177e4 LT |
243 | } |
244 | ||
e61ef499 AE |
245 | static void amp_init(struct hci_dev *hdev) |
246 | { | |
2455a3ea AE |
247 | hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED; |
248 | ||
e61ef499 AE |
249 | /* Reset */ |
250 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); | |
251 | ||
252 | /* Read Local Version */ | |
253 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); | |
254 | } | |
255 | ||
256 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) | |
257 | { | |
258 | struct sk_buff *skb; | |
259 | ||
260 | BT_DBG("%s %ld", hdev->name, opt); | |
261 | ||
262 | /* Driver initialization */ | |
263 | ||
264 | /* Special commands */ | |
265 | while ((skb = skb_dequeue(&hdev->driver_init))) { | |
266 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; | |
267 | skb->dev = (void *) hdev; | |
268 | ||
269 | skb_queue_tail(&hdev->cmd_q, skb); | |
270 | queue_work(hdev->workqueue, &hdev->cmd_work); | |
271 | } | |
272 | skb_queue_purge(&hdev->driver_init); | |
273 | ||
274 | switch (hdev->dev_type) { | |
275 | case HCI_BREDR: | |
276 | bredr_init(hdev); | |
277 | break; | |
278 | ||
279 | case HCI_AMP: | |
280 | amp_init(hdev); | |
281 | break; | |
282 | ||
283 | default: | |
284 | BT_ERR("Unknown device type %d", hdev->dev_type); | |
285 | break; | |
286 | } | |
287 | ||
288 | } | |
289 | ||
6ed58ec5 VT |
290 | static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt) |
291 | { | |
292 | BT_DBG("%s", hdev->name); | |
293 | ||
294 | /* Read LE buffer size */ | |
295 | hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL); | |
296 | } | |
297 | ||
1da177e4 LT |
298 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) |
299 | { | |
300 | __u8 scan = opt; | |
301 | ||
302 | BT_DBG("%s %x", hdev->name, scan); | |
303 | ||
304 | /* Inquiry and Page scans */ | |
a9de9248 | 305 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1da177e4 LT |
306 | } |
307 | ||
308 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
309 | { | |
310 | __u8 auth = opt; | |
311 | ||
312 | BT_DBG("%s %x", hdev->name, auth); | |
313 | ||
314 | /* Authentication */ | |
a9de9248 | 315 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
1da177e4 LT |
316 | } |
317 | ||
318 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
319 | { | |
320 | __u8 encrypt = opt; | |
321 | ||
322 | BT_DBG("%s %x", hdev->name, encrypt); | |
323 | ||
e4e8e37c | 324 | /* Encryption */ |
a9de9248 | 325 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
1da177e4 LT |
326 | } |
327 | ||
e4e8e37c MH |
328 | static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
329 | { | |
330 | __le16 policy = cpu_to_le16(opt); | |
331 | ||
a418b893 | 332 | BT_DBG("%s %x", hdev->name, policy); |
e4e8e37c MH |
333 | |
334 | /* Default link policy */ | |
335 | hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); | |
336 | } | |
337 | ||
8e87d142 | 338 | /* Get HCI device by index. |
1da177e4 LT |
339 | * Device is held on return. */ |
340 | struct hci_dev *hci_dev_get(int index) | |
341 | { | |
8035ded4 | 342 | struct hci_dev *hdev = NULL, *d; |
1da177e4 LT |
343 | |
344 | BT_DBG("%d", index); | |
345 | ||
346 | if (index < 0) | |
347 | return NULL; | |
348 | ||
349 | read_lock(&hci_dev_list_lock); | |
8035ded4 | 350 | list_for_each_entry(d, &hci_dev_list, list) { |
1da177e4 LT |
351 | if (d->id == index) { |
352 | hdev = hci_dev_hold(d); | |
353 | break; | |
354 | } | |
355 | } | |
356 | read_unlock(&hci_dev_list_lock); | |
357 | return hdev; | |
358 | } | |
1da177e4 LT |
359 | |
360 | /* ---- Inquiry support ---- */ | |
ff9ef578 | 361 | |
30dc78e1 JH |
362 | bool hci_discovery_active(struct hci_dev *hdev) |
363 | { | |
364 | struct discovery_state *discov = &hdev->discovery; | |
365 | ||
6fbe195d | 366 | switch (discov->state) { |
343f935b | 367 | case DISCOVERY_FINDING: |
6fbe195d | 368 | case DISCOVERY_RESOLVING: |
30dc78e1 JH |
369 | return true; |
370 | ||
6fbe195d AG |
371 | default: |
372 | return false; | |
373 | } | |
30dc78e1 JH |
374 | } |
375 | ||
ff9ef578 JH |
376 | void hci_discovery_set_state(struct hci_dev *hdev, int state) |
377 | { | |
378 | BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state); | |
379 | ||
380 | if (hdev->discovery.state == state) | |
381 | return; | |
382 | ||
383 | switch (state) { | |
384 | case DISCOVERY_STOPPED: | |
7b99b659 AG |
385 | if (hdev->discovery.state != DISCOVERY_STARTING) |
386 | mgmt_discovering(hdev, 0); | |
f963e8e9 | 387 | hdev->discovery.type = 0; |
ff9ef578 JH |
388 | break; |
389 | case DISCOVERY_STARTING: | |
390 | break; | |
343f935b | 391 | case DISCOVERY_FINDING: |
ff9ef578 JH |
392 | mgmt_discovering(hdev, 1); |
393 | break; | |
30dc78e1 JH |
394 | case DISCOVERY_RESOLVING: |
395 | break; | |
ff9ef578 JH |
396 | case DISCOVERY_STOPPING: |
397 | break; | |
398 | } | |
399 | ||
400 | hdev->discovery.state = state; | |
401 | } | |
402 | ||
1da177e4 LT |
403 | static void inquiry_cache_flush(struct hci_dev *hdev) |
404 | { | |
30883512 | 405 | struct discovery_state *cache = &hdev->discovery; |
b57c1a56 | 406 | struct inquiry_entry *p, *n; |
1da177e4 | 407 | |
561aafbc JH |
408 | list_for_each_entry_safe(p, n, &cache->all, all) { |
409 | list_del(&p->all); | |
b57c1a56 | 410 | kfree(p); |
1da177e4 | 411 | } |
561aafbc JH |
412 | |
413 | INIT_LIST_HEAD(&cache->unknown); | |
414 | INIT_LIST_HEAD(&cache->resolve); | |
1da177e4 LT |
415 | } |
416 | ||
417 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
418 | { | |
30883512 | 419 | struct discovery_state *cache = &hdev->discovery; |
1da177e4 LT |
420 | struct inquiry_entry *e; |
421 | ||
422 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
423 | ||
561aafbc JH |
424 | list_for_each_entry(e, &cache->all, all) { |
425 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
426 | return e; | |
427 | } | |
428 | ||
429 | return NULL; | |
430 | } | |
431 | ||
432 | struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev, | |
04124681 | 433 | bdaddr_t *bdaddr) |
561aafbc | 434 | { |
30883512 | 435 | struct discovery_state *cache = &hdev->discovery; |
561aafbc JH |
436 | struct inquiry_entry *e; |
437 | ||
438 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
439 | ||
440 | list_for_each_entry(e, &cache->unknown, list) { | |
1da177e4 | 441 | if (!bacmp(&e->data.bdaddr, bdaddr)) |
b57c1a56 JH |
442 | return e; |
443 | } | |
444 | ||
445 | return NULL; | |
1da177e4 LT |
446 | } |
447 | ||
30dc78e1 | 448 | struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev, |
04124681 GP |
449 | bdaddr_t *bdaddr, |
450 | int state) | |
30dc78e1 JH |
451 | { |
452 | struct discovery_state *cache = &hdev->discovery; | |
453 | struct inquiry_entry *e; | |
454 | ||
455 | BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state); | |
456 | ||
457 | list_for_each_entry(e, &cache->resolve, list) { | |
458 | if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state) | |
459 | return e; | |
460 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
461 | return e; | |
462 | } | |
463 | ||
464 | return NULL; | |
465 | } | |
466 | ||
a3d4e20a | 467 | void hci_inquiry_cache_update_resolve(struct hci_dev *hdev, |
04124681 | 468 | struct inquiry_entry *ie) |
a3d4e20a JH |
469 | { |
470 | struct discovery_state *cache = &hdev->discovery; | |
471 | struct list_head *pos = &cache->resolve; | |
472 | struct inquiry_entry *p; | |
473 | ||
474 | list_del(&ie->list); | |
475 | ||
476 | list_for_each_entry(p, &cache->resolve, list) { | |
477 | if (p->name_state != NAME_PENDING && | |
478 | abs(p->data.rssi) >= abs(ie->data.rssi)) | |
479 | break; | |
480 | pos = &p->list; | |
481 | } | |
482 | ||
483 | list_add(&ie->list, pos); | |
484 | } | |
485 | ||
3175405b | 486 | bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data, |
04124681 | 487 | bool name_known, bool *ssp) |
1da177e4 | 488 | { |
30883512 | 489 | struct discovery_state *cache = &hdev->discovery; |
70f23020 | 490 | struct inquiry_entry *ie; |
1da177e4 LT |
491 | |
492 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
493 | ||
388fc8fa JH |
494 | if (ssp) |
495 | *ssp = data->ssp_mode; | |
496 | ||
70f23020 | 497 | ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr); |
a3d4e20a | 498 | if (ie) { |
388fc8fa JH |
499 | if (ie->data.ssp_mode && ssp) |
500 | *ssp = true; | |
501 | ||
a3d4e20a JH |
502 | if (ie->name_state == NAME_NEEDED && |
503 | data->rssi != ie->data.rssi) { | |
504 | ie->data.rssi = data->rssi; | |
505 | hci_inquiry_cache_update_resolve(hdev, ie); | |
506 | } | |
507 | ||
561aafbc | 508 | goto update; |
a3d4e20a | 509 | } |
561aafbc JH |
510 | |
511 | /* Entry not in the cache. Add new one. */ | |
512 | ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC); | |
513 | if (!ie) | |
3175405b | 514 | return false; |
561aafbc JH |
515 | |
516 | list_add(&ie->all, &cache->all); | |
517 | ||
518 | if (name_known) { | |
519 | ie->name_state = NAME_KNOWN; | |
520 | } else { | |
521 | ie->name_state = NAME_NOT_KNOWN; | |
522 | list_add(&ie->list, &cache->unknown); | |
523 | } | |
70f23020 | 524 | |
561aafbc JH |
525 | update: |
526 | if (name_known && ie->name_state != NAME_KNOWN && | |
527 | ie->name_state != NAME_PENDING) { | |
528 | ie->name_state = NAME_KNOWN; | |
529 | list_del(&ie->list); | |
1da177e4 LT |
530 | } |
531 | ||
70f23020 AE |
532 | memcpy(&ie->data, data, sizeof(*data)); |
533 | ie->timestamp = jiffies; | |
1da177e4 | 534 | cache->timestamp = jiffies; |
3175405b JH |
535 | |
536 | if (ie->name_state == NAME_NOT_KNOWN) | |
537 | return false; | |
538 | ||
539 | return true; | |
1da177e4 LT |
540 | } |
541 | ||
542 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
543 | { | |
30883512 | 544 | struct discovery_state *cache = &hdev->discovery; |
1da177e4 LT |
545 | struct inquiry_info *info = (struct inquiry_info *) buf; |
546 | struct inquiry_entry *e; | |
547 | int copied = 0; | |
548 | ||
561aafbc | 549 | list_for_each_entry(e, &cache->all, all) { |
1da177e4 | 550 | struct inquiry_data *data = &e->data; |
b57c1a56 JH |
551 | |
552 | if (copied >= num) | |
553 | break; | |
554 | ||
1da177e4 LT |
555 | bacpy(&info->bdaddr, &data->bdaddr); |
556 | info->pscan_rep_mode = data->pscan_rep_mode; | |
557 | info->pscan_period_mode = data->pscan_period_mode; | |
558 | info->pscan_mode = data->pscan_mode; | |
559 | memcpy(info->dev_class, data->dev_class, 3); | |
560 | info->clock_offset = data->clock_offset; | |
b57c1a56 | 561 | |
1da177e4 | 562 | info++; |
b57c1a56 | 563 | copied++; |
1da177e4 LT |
564 | } |
565 | ||
566 | BT_DBG("cache %p, copied %d", cache, copied); | |
567 | return copied; | |
568 | } | |
569 | ||
570 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
571 | { | |
572 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
573 | struct hci_cp_inquiry cp; | |
574 | ||
575 | BT_DBG("%s", hdev->name); | |
576 | ||
577 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
578 | return; | |
579 | ||
580 | /* Start Inquiry */ | |
581 | memcpy(&cp.lap, &ir->lap, 3); | |
582 | cp.length = ir->length; | |
583 | cp.num_rsp = ir->num_rsp; | |
a9de9248 | 584 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
1da177e4 LT |
585 | } |
586 | ||
587 | int hci_inquiry(void __user *arg) | |
588 | { | |
589 | __u8 __user *ptr = arg; | |
590 | struct hci_inquiry_req ir; | |
591 | struct hci_dev *hdev; | |
592 | int err = 0, do_inquiry = 0, max_rsp; | |
593 | long timeo; | |
594 | __u8 *buf; | |
595 | ||
596 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
597 | return -EFAULT; | |
598 | ||
5a08ecce AE |
599 | hdev = hci_dev_get(ir.dev_id); |
600 | if (!hdev) | |
1da177e4 LT |
601 | return -ENODEV; |
602 | ||
09fd0de5 | 603 | hci_dev_lock(hdev); |
8e87d142 | 604 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
70f23020 AE |
605 | inquiry_cache_empty(hdev) || |
606 | ir.flags & IREQ_CACHE_FLUSH) { | |
1da177e4 LT |
607 | inquiry_cache_flush(hdev); |
608 | do_inquiry = 1; | |
609 | } | |
09fd0de5 | 610 | hci_dev_unlock(hdev); |
1da177e4 | 611 | |
04837f64 | 612 | timeo = ir.length * msecs_to_jiffies(2000); |
70f23020 AE |
613 | |
614 | if (do_inquiry) { | |
615 | err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo); | |
616 | if (err < 0) | |
617 | goto done; | |
618 | } | |
1da177e4 LT |
619 | |
620 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
621 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
622 | ||
623 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
624 | * copy it to the user space. | |
625 | */ | |
01df8c31 | 626 | buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL); |
70f23020 | 627 | if (!buf) { |
1da177e4 LT |
628 | err = -ENOMEM; |
629 | goto done; | |
630 | } | |
631 | ||
09fd0de5 | 632 | hci_dev_lock(hdev); |
1da177e4 | 633 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); |
09fd0de5 | 634 | hci_dev_unlock(hdev); |
1da177e4 LT |
635 | |
636 | BT_DBG("num_rsp %d", ir.num_rsp); | |
637 | ||
638 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
639 | ptr += sizeof(ir); | |
640 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
641 | ir.num_rsp)) | |
642 | err = -EFAULT; | |
8e87d142 | 643 | } else |
1da177e4 LT |
644 | err = -EFAULT; |
645 | ||
646 | kfree(buf); | |
647 | ||
648 | done: | |
649 | hci_dev_put(hdev); | |
650 | return err; | |
651 | } | |
652 | ||
653 | /* ---- HCI ioctl helpers ---- */ | |
654 | ||
655 | int hci_dev_open(__u16 dev) | |
656 | { | |
657 | struct hci_dev *hdev; | |
658 | int ret = 0; | |
659 | ||
5a08ecce AE |
660 | hdev = hci_dev_get(dev); |
661 | if (!hdev) | |
1da177e4 LT |
662 | return -ENODEV; |
663 | ||
664 | BT_DBG("%s %p", hdev->name, hdev); | |
665 | ||
666 | hci_req_lock(hdev); | |
667 | ||
94324962 JH |
668 | if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) { |
669 | ret = -ENODEV; | |
670 | goto done; | |
671 | } | |
672 | ||
611b30f7 MH |
673 | if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) { |
674 | ret = -ERFKILL; | |
675 | goto done; | |
676 | } | |
677 | ||
1da177e4 LT |
678 | if (test_bit(HCI_UP, &hdev->flags)) { |
679 | ret = -EALREADY; | |
680 | goto done; | |
681 | } | |
682 | ||
683 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
684 | set_bit(HCI_RAW, &hdev->flags); | |
685 | ||
07e3b94a AE |
686 | /* Treat all non BR/EDR controllers as raw devices if |
687 | enable_hs is not set */ | |
688 | if (hdev->dev_type != HCI_BREDR && !enable_hs) | |
943da25d MH |
689 | set_bit(HCI_RAW, &hdev->flags); |
690 | ||
1da177e4 LT |
691 | if (hdev->open(hdev)) { |
692 | ret = -EIO; | |
693 | goto done; | |
694 | } | |
695 | ||
696 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
697 | atomic_set(&hdev->cmd_cnt, 1); | |
698 | set_bit(HCI_INIT, &hdev->flags); | |
a5040efa | 699 | hdev->init_last_cmd = 0; |
1da177e4 | 700 | |
04837f64 MH |
701 | ret = __hci_request(hdev, hci_init_req, 0, |
702 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 | 703 | |
eead27da | 704 | if (lmp_host_le_capable(hdev)) |
6ed58ec5 VT |
705 | ret = __hci_request(hdev, hci_le_init_req, 0, |
706 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
707 | ||
1da177e4 LT |
708 | clear_bit(HCI_INIT, &hdev->flags); |
709 | } | |
710 | ||
711 | if (!ret) { | |
712 | hci_dev_hold(hdev); | |
713 | set_bit(HCI_UP, &hdev->flags); | |
714 | hci_notify(hdev, HCI_DEV_UP); | |
a8b2d5c2 | 715 | if (!test_bit(HCI_SETUP, &hdev->dev_flags)) { |
09fd0de5 | 716 | hci_dev_lock(hdev); |
744cf19e | 717 | mgmt_powered(hdev, 1); |
09fd0de5 | 718 | hci_dev_unlock(hdev); |
56e5cb86 | 719 | } |
8e87d142 | 720 | } else { |
1da177e4 | 721 | /* Init failed, cleanup */ |
3eff45ea | 722 | flush_work(&hdev->tx_work); |
c347b765 | 723 | flush_work(&hdev->cmd_work); |
b78752cc | 724 | flush_work(&hdev->rx_work); |
1da177e4 LT |
725 | |
726 | skb_queue_purge(&hdev->cmd_q); | |
727 | skb_queue_purge(&hdev->rx_q); | |
728 | ||
729 | if (hdev->flush) | |
730 | hdev->flush(hdev); | |
731 | ||
732 | if (hdev->sent_cmd) { | |
733 | kfree_skb(hdev->sent_cmd); | |
734 | hdev->sent_cmd = NULL; | |
735 | } | |
736 | ||
737 | hdev->close(hdev); | |
738 | hdev->flags = 0; | |
739 | } | |
740 | ||
741 | done: | |
742 | hci_req_unlock(hdev); | |
743 | hci_dev_put(hdev); | |
744 | return ret; | |
745 | } | |
746 | ||
747 | static int hci_dev_do_close(struct hci_dev *hdev) | |
748 | { | |
749 | BT_DBG("%s %p", hdev->name, hdev); | |
750 | ||
28b75a89 AG |
751 | cancel_work_sync(&hdev->le_scan); |
752 | ||
1da177e4 LT |
753 | hci_req_cancel(hdev, ENODEV); |
754 | hci_req_lock(hdev); | |
755 | ||
756 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
b79f44c1 | 757 | del_timer_sync(&hdev->cmd_timer); |
1da177e4 LT |
758 | hci_req_unlock(hdev); |
759 | return 0; | |
760 | } | |
761 | ||
3eff45ea GP |
762 | /* Flush RX and TX works */ |
763 | flush_work(&hdev->tx_work); | |
b78752cc | 764 | flush_work(&hdev->rx_work); |
1da177e4 | 765 | |
16ab91ab | 766 | if (hdev->discov_timeout > 0) { |
e0f9309f | 767 | cancel_delayed_work(&hdev->discov_off); |
16ab91ab | 768 | hdev->discov_timeout = 0; |
5e5282bb | 769 | clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags); |
16ab91ab JH |
770 | } |
771 | ||
a8b2d5c2 | 772 | if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags)) |
7d78525d JH |
773 | cancel_delayed_work(&hdev->service_cache); |
774 | ||
7ba8b4be AG |
775 | cancel_delayed_work_sync(&hdev->le_scan_disable); |
776 | ||
09fd0de5 | 777 | hci_dev_lock(hdev); |
1da177e4 LT |
778 | inquiry_cache_flush(hdev); |
779 | hci_conn_hash_flush(hdev); | |
09fd0de5 | 780 | hci_dev_unlock(hdev); |
1da177e4 LT |
781 | |
782 | hci_notify(hdev, HCI_DEV_DOWN); | |
783 | ||
784 | if (hdev->flush) | |
785 | hdev->flush(hdev); | |
786 | ||
787 | /* Reset device */ | |
788 | skb_queue_purge(&hdev->cmd_q); | |
789 | atomic_set(&hdev->cmd_cnt, 1); | |
8af59467 JH |
790 | if (!test_bit(HCI_RAW, &hdev->flags) && |
791 | test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) { | |
1da177e4 | 792 | set_bit(HCI_INIT, &hdev->flags); |
04837f64 | 793 | __hci_request(hdev, hci_reset_req, 0, |
cad44c2b | 794 | msecs_to_jiffies(250)); |
1da177e4 LT |
795 | clear_bit(HCI_INIT, &hdev->flags); |
796 | } | |
797 | ||
c347b765 GP |
798 | /* flush cmd work */ |
799 | flush_work(&hdev->cmd_work); | |
1da177e4 LT |
800 | |
801 | /* Drop queues */ | |
802 | skb_queue_purge(&hdev->rx_q); | |
803 | skb_queue_purge(&hdev->cmd_q); | |
804 | skb_queue_purge(&hdev->raw_q); | |
805 | ||
806 | /* Drop last sent command */ | |
807 | if (hdev->sent_cmd) { | |
b79f44c1 | 808 | del_timer_sync(&hdev->cmd_timer); |
1da177e4 LT |
809 | kfree_skb(hdev->sent_cmd); |
810 | hdev->sent_cmd = NULL; | |
811 | } | |
812 | ||
813 | /* After this point our queues are empty | |
814 | * and no tasks are scheduled. */ | |
815 | hdev->close(hdev); | |
816 | ||
8ee56540 MH |
817 | if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) { |
818 | hci_dev_lock(hdev); | |
819 | mgmt_powered(hdev, 0); | |
820 | hci_dev_unlock(hdev); | |
821 | } | |
5add6af8 | 822 | |
1da177e4 LT |
823 | /* Clear flags */ |
824 | hdev->flags = 0; | |
825 | ||
e59fda8d | 826 | memset(hdev->eir, 0, sizeof(hdev->eir)); |
09b3c3fb | 827 | memset(hdev->dev_class, 0, sizeof(hdev->dev_class)); |
e59fda8d | 828 | |
1da177e4 LT |
829 | hci_req_unlock(hdev); |
830 | ||
831 | hci_dev_put(hdev); | |
832 | return 0; | |
833 | } | |
834 | ||
835 | int hci_dev_close(__u16 dev) | |
836 | { | |
837 | struct hci_dev *hdev; | |
838 | int err; | |
839 | ||
70f23020 AE |
840 | hdev = hci_dev_get(dev); |
841 | if (!hdev) | |
1da177e4 | 842 | return -ENODEV; |
8ee56540 MH |
843 | |
844 | if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) | |
845 | cancel_delayed_work(&hdev->power_off); | |
846 | ||
1da177e4 | 847 | err = hci_dev_do_close(hdev); |
8ee56540 | 848 | |
1da177e4 LT |
849 | hci_dev_put(hdev); |
850 | return err; | |
851 | } | |
852 | ||
853 | int hci_dev_reset(__u16 dev) | |
854 | { | |
855 | struct hci_dev *hdev; | |
856 | int ret = 0; | |
857 | ||
70f23020 AE |
858 | hdev = hci_dev_get(dev); |
859 | if (!hdev) | |
1da177e4 LT |
860 | return -ENODEV; |
861 | ||
862 | hci_req_lock(hdev); | |
1da177e4 LT |
863 | |
864 | if (!test_bit(HCI_UP, &hdev->flags)) | |
865 | goto done; | |
866 | ||
867 | /* Drop queues */ | |
868 | skb_queue_purge(&hdev->rx_q); | |
869 | skb_queue_purge(&hdev->cmd_q); | |
870 | ||
09fd0de5 | 871 | hci_dev_lock(hdev); |
1da177e4 LT |
872 | inquiry_cache_flush(hdev); |
873 | hci_conn_hash_flush(hdev); | |
09fd0de5 | 874 | hci_dev_unlock(hdev); |
1da177e4 LT |
875 | |
876 | if (hdev->flush) | |
877 | hdev->flush(hdev); | |
878 | ||
8e87d142 | 879 | atomic_set(&hdev->cmd_cnt, 1); |
6ed58ec5 | 880 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0; |
1da177e4 LT |
881 | |
882 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
883 | ret = __hci_request(hdev, hci_reset_req, 0, |
884 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
885 | |
886 | done: | |
1da177e4 LT |
887 | hci_req_unlock(hdev); |
888 | hci_dev_put(hdev); | |
889 | return ret; | |
890 | } | |
891 | ||
892 | int hci_dev_reset_stat(__u16 dev) | |
893 | { | |
894 | struct hci_dev *hdev; | |
895 | int ret = 0; | |
896 | ||
70f23020 AE |
897 | hdev = hci_dev_get(dev); |
898 | if (!hdev) | |
1da177e4 LT |
899 | return -ENODEV; |
900 | ||
901 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
902 | ||
903 | hci_dev_put(hdev); | |
904 | ||
905 | return ret; | |
906 | } | |
907 | ||
908 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
909 | { | |
910 | struct hci_dev *hdev; | |
911 | struct hci_dev_req dr; | |
912 | int err = 0; | |
913 | ||
914 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
915 | return -EFAULT; | |
916 | ||
70f23020 AE |
917 | hdev = hci_dev_get(dr.dev_id); |
918 | if (!hdev) | |
1da177e4 LT |
919 | return -ENODEV; |
920 | ||
921 | switch (cmd) { | |
922 | case HCISETAUTH: | |
04837f64 MH |
923 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
924 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
925 | break; |
926 | ||
927 | case HCISETENCRYPT: | |
928 | if (!lmp_encrypt_capable(hdev)) { | |
929 | err = -EOPNOTSUPP; | |
930 | break; | |
931 | } | |
932 | ||
933 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
934 | /* Auth must be enabled first */ | |
04837f64 MH |
935 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
936 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
937 | if (err) |
938 | break; | |
939 | } | |
940 | ||
04837f64 MH |
941 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
942 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
943 | break; |
944 | ||
945 | case HCISETSCAN: | |
04837f64 MH |
946 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
947 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
948 | break; |
949 | ||
1da177e4 | 950 | case HCISETLINKPOL: |
e4e8e37c MH |
951 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
952 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
953 | break; |
954 | ||
955 | case HCISETLINKMODE: | |
e4e8e37c MH |
956 | hdev->link_mode = ((__u16) dr.dev_opt) & |
957 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
958 | break; | |
959 | ||
960 | case HCISETPTYPE: | |
961 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
962 | break; |
963 | ||
964 | case HCISETACLMTU: | |
e4e8e37c MH |
965 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
966 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
967 | break; |
968 | ||
969 | case HCISETSCOMTU: | |
e4e8e37c MH |
970 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
971 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
972 | break; |
973 | ||
974 | default: | |
975 | err = -EINVAL; | |
976 | break; | |
977 | } | |
e4e8e37c | 978 | |
1da177e4 LT |
979 | hci_dev_put(hdev); |
980 | return err; | |
981 | } | |
982 | ||
983 | int hci_get_dev_list(void __user *arg) | |
984 | { | |
8035ded4 | 985 | struct hci_dev *hdev; |
1da177e4 LT |
986 | struct hci_dev_list_req *dl; |
987 | struct hci_dev_req *dr; | |
1da177e4 LT |
988 | int n = 0, size, err; |
989 | __u16 dev_num; | |
990 | ||
991 | if (get_user(dev_num, (__u16 __user *) arg)) | |
992 | return -EFAULT; | |
993 | ||
994 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
995 | return -EINVAL; | |
996 | ||
997 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
998 | ||
70f23020 AE |
999 | dl = kzalloc(size, GFP_KERNEL); |
1000 | if (!dl) | |
1da177e4 LT |
1001 | return -ENOMEM; |
1002 | ||
1003 | dr = dl->dev_req; | |
1004 | ||
f20d09d5 | 1005 | read_lock(&hci_dev_list_lock); |
8035ded4 | 1006 | list_for_each_entry(hdev, &hci_dev_list, list) { |
a8b2d5c2 | 1007 | if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) |
e0f9309f | 1008 | cancel_delayed_work(&hdev->power_off); |
c542a06c | 1009 | |
a8b2d5c2 JH |
1010 | if (!test_bit(HCI_MGMT, &hdev->dev_flags)) |
1011 | set_bit(HCI_PAIRABLE, &hdev->dev_flags); | |
c542a06c | 1012 | |
1da177e4 LT |
1013 | (dr + n)->dev_id = hdev->id; |
1014 | (dr + n)->dev_opt = hdev->flags; | |
c542a06c | 1015 | |
1da177e4 LT |
1016 | if (++n >= dev_num) |
1017 | break; | |
1018 | } | |
f20d09d5 | 1019 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
1020 | |
1021 | dl->dev_num = n; | |
1022 | size = sizeof(*dl) + n * sizeof(*dr); | |
1023 | ||
1024 | err = copy_to_user(arg, dl, size); | |
1025 | kfree(dl); | |
1026 | ||
1027 | return err ? -EFAULT : 0; | |
1028 | } | |
1029 | ||
1030 | int hci_get_dev_info(void __user *arg) | |
1031 | { | |
1032 | struct hci_dev *hdev; | |
1033 | struct hci_dev_info di; | |
1034 | int err = 0; | |
1035 | ||
1036 | if (copy_from_user(&di, arg, sizeof(di))) | |
1037 | return -EFAULT; | |
1038 | ||
70f23020 AE |
1039 | hdev = hci_dev_get(di.dev_id); |
1040 | if (!hdev) | |
1da177e4 LT |
1041 | return -ENODEV; |
1042 | ||
a8b2d5c2 | 1043 | if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) |
3243553f | 1044 | cancel_delayed_work_sync(&hdev->power_off); |
ab81cbf9 | 1045 | |
a8b2d5c2 JH |
1046 | if (!test_bit(HCI_MGMT, &hdev->dev_flags)) |
1047 | set_bit(HCI_PAIRABLE, &hdev->dev_flags); | |
c542a06c | 1048 | |
1da177e4 LT |
1049 | strcpy(di.name, hdev->name); |
1050 | di.bdaddr = hdev->bdaddr; | |
943da25d | 1051 | di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4); |
1da177e4 LT |
1052 | di.flags = hdev->flags; |
1053 | di.pkt_type = hdev->pkt_type; | |
1054 | di.acl_mtu = hdev->acl_mtu; | |
1055 | di.acl_pkts = hdev->acl_pkts; | |
1056 | di.sco_mtu = hdev->sco_mtu; | |
1057 | di.sco_pkts = hdev->sco_pkts; | |
1058 | di.link_policy = hdev->link_policy; | |
1059 | di.link_mode = hdev->link_mode; | |
1060 | ||
1061 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
1062 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
1063 | ||
1064 | if (copy_to_user(arg, &di, sizeof(di))) | |
1065 | err = -EFAULT; | |
1066 | ||
1067 | hci_dev_put(hdev); | |
1068 | ||
1069 | return err; | |
1070 | } | |
1071 | ||
1072 | /* ---- Interface to HCI drivers ---- */ | |
1073 | ||
611b30f7 MH |
1074 | static int hci_rfkill_set_block(void *data, bool blocked) |
1075 | { | |
1076 | struct hci_dev *hdev = data; | |
1077 | ||
1078 | BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); | |
1079 | ||
1080 | if (!blocked) | |
1081 | return 0; | |
1082 | ||
1083 | hci_dev_do_close(hdev); | |
1084 | ||
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | static const struct rfkill_ops hci_rfkill_ops = { | |
1089 | .set_block = hci_rfkill_set_block, | |
1090 | }; | |
1091 | ||
1da177e4 LT |
1092 | /* Alloc HCI device */ |
1093 | struct hci_dev *hci_alloc_dev(void) | |
1094 | { | |
1095 | struct hci_dev *hdev; | |
1096 | ||
25ea6db0 | 1097 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
1098 | if (!hdev) |
1099 | return NULL; | |
1100 | ||
0ac7e700 | 1101 | hci_init_sysfs(hdev); |
1da177e4 LT |
1102 | skb_queue_head_init(&hdev->driver_init); |
1103 | ||
1104 | return hdev; | |
1105 | } | |
1106 | EXPORT_SYMBOL(hci_alloc_dev); | |
1107 | ||
1108 | /* Free HCI device */ | |
1109 | void hci_free_dev(struct hci_dev *hdev) | |
1110 | { | |
1111 | skb_queue_purge(&hdev->driver_init); | |
1112 | ||
a91f2e39 MH |
1113 | /* will free via device release */ |
1114 | put_device(&hdev->dev); | |
1da177e4 LT |
1115 | } |
1116 | EXPORT_SYMBOL(hci_free_dev); | |
1117 | ||
ab81cbf9 JH |
1118 | static void hci_power_on(struct work_struct *work) |
1119 | { | |
1120 | struct hci_dev *hdev = container_of(work, struct hci_dev, power_on); | |
1121 | ||
1122 | BT_DBG("%s", hdev->name); | |
1123 | ||
1124 | if (hci_dev_open(hdev->id) < 0) | |
1125 | return; | |
1126 | ||
a8b2d5c2 | 1127 | if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags)) |
80b7ab33 | 1128 | schedule_delayed_work(&hdev->power_off, |
3243553f | 1129 | msecs_to_jiffies(AUTO_OFF_TIMEOUT)); |
ab81cbf9 | 1130 | |
a8b2d5c2 | 1131 | if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags)) |
744cf19e | 1132 | mgmt_index_added(hdev); |
ab81cbf9 JH |
1133 | } |
1134 | ||
1135 | static void hci_power_off(struct work_struct *work) | |
1136 | { | |
3243553f JH |
1137 | struct hci_dev *hdev = container_of(work, struct hci_dev, |
1138 | power_off.work); | |
ab81cbf9 JH |
1139 | |
1140 | BT_DBG("%s", hdev->name); | |
1141 | ||
8ee56540 | 1142 | hci_dev_do_close(hdev); |
ab81cbf9 JH |
1143 | } |
1144 | ||
16ab91ab JH |
1145 | static void hci_discov_off(struct work_struct *work) |
1146 | { | |
1147 | struct hci_dev *hdev; | |
1148 | u8 scan = SCAN_PAGE; | |
1149 | ||
1150 | hdev = container_of(work, struct hci_dev, discov_off.work); | |
1151 | ||
1152 | BT_DBG("%s", hdev->name); | |
1153 | ||
09fd0de5 | 1154 | hci_dev_lock(hdev); |
16ab91ab JH |
1155 | |
1156 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan); | |
1157 | ||
1158 | hdev->discov_timeout = 0; | |
1159 | ||
09fd0de5 | 1160 | hci_dev_unlock(hdev); |
16ab91ab JH |
1161 | } |
1162 | ||
2aeb9a1a JH |
1163 | int hci_uuids_clear(struct hci_dev *hdev) |
1164 | { | |
1165 | struct list_head *p, *n; | |
1166 | ||
1167 | list_for_each_safe(p, n, &hdev->uuids) { | |
1168 | struct bt_uuid *uuid; | |
1169 | ||
1170 | uuid = list_entry(p, struct bt_uuid, list); | |
1171 | ||
1172 | list_del(p); | |
1173 | kfree(uuid); | |
1174 | } | |
1175 | ||
1176 | return 0; | |
1177 | } | |
1178 | ||
55ed8ca1 JH |
1179 | int hci_link_keys_clear(struct hci_dev *hdev) |
1180 | { | |
1181 | struct list_head *p, *n; | |
1182 | ||
1183 | list_for_each_safe(p, n, &hdev->link_keys) { | |
1184 | struct link_key *key; | |
1185 | ||
1186 | key = list_entry(p, struct link_key, list); | |
1187 | ||
1188 | list_del(p); | |
1189 | kfree(key); | |
1190 | } | |
1191 | ||
1192 | return 0; | |
1193 | } | |
1194 | ||
b899efaf VCG |
1195 | int hci_smp_ltks_clear(struct hci_dev *hdev) |
1196 | { | |
1197 | struct smp_ltk *k, *tmp; | |
1198 | ||
1199 | list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) { | |
1200 | list_del(&k->list); | |
1201 | kfree(k); | |
1202 | } | |
1203 | ||
1204 | return 0; | |
1205 | } | |
1206 | ||
55ed8ca1 JH |
1207 | struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1208 | { | |
8035ded4 | 1209 | struct link_key *k; |
55ed8ca1 | 1210 | |
8035ded4 | 1211 | list_for_each_entry(k, &hdev->link_keys, list) |
55ed8ca1 JH |
1212 | if (bacmp(bdaddr, &k->bdaddr) == 0) |
1213 | return k; | |
55ed8ca1 JH |
1214 | |
1215 | return NULL; | |
1216 | } | |
1217 | ||
745c0ce3 | 1218 | static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn, |
d25e28ab JH |
1219 | u8 key_type, u8 old_key_type) |
1220 | { | |
1221 | /* Legacy key */ | |
1222 | if (key_type < 0x03) | |
745c0ce3 | 1223 | return true; |
d25e28ab JH |
1224 | |
1225 | /* Debug keys are insecure so don't store them persistently */ | |
1226 | if (key_type == HCI_LK_DEBUG_COMBINATION) | |
745c0ce3 | 1227 | return false; |
d25e28ab JH |
1228 | |
1229 | /* Changed combination key and there's no previous one */ | |
1230 | if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff) | |
745c0ce3 | 1231 | return false; |
d25e28ab JH |
1232 | |
1233 | /* Security mode 3 case */ | |
1234 | if (!conn) | |
745c0ce3 | 1235 | return true; |
d25e28ab JH |
1236 | |
1237 | /* Neither local nor remote side had no-bonding as requirement */ | |
1238 | if (conn->auth_type > 0x01 && conn->remote_auth > 0x01) | |
745c0ce3 | 1239 | return true; |
d25e28ab JH |
1240 | |
1241 | /* Local side had dedicated bonding as requirement */ | |
1242 | if (conn->auth_type == 0x02 || conn->auth_type == 0x03) | |
745c0ce3 | 1243 | return true; |
d25e28ab JH |
1244 | |
1245 | /* Remote side had dedicated bonding as requirement */ | |
1246 | if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03) | |
745c0ce3 | 1247 | return true; |
d25e28ab JH |
1248 | |
1249 | /* If none of the above criteria match, then don't store the key | |
1250 | * persistently */ | |
745c0ce3 | 1251 | return false; |
d25e28ab JH |
1252 | } |
1253 | ||
c9839a11 | 1254 | struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8]) |
75d262c2 | 1255 | { |
c9839a11 | 1256 | struct smp_ltk *k; |
75d262c2 | 1257 | |
c9839a11 VCG |
1258 | list_for_each_entry(k, &hdev->long_term_keys, list) { |
1259 | if (k->ediv != ediv || | |
1260 | memcmp(rand, k->rand, sizeof(k->rand))) | |
75d262c2 VCG |
1261 | continue; |
1262 | ||
c9839a11 | 1263 | return k; |
75d262c2 VCG |
1264 | } |
1265 | ||
1266 | return NULL; | |
1267 | } | |
1268 | EXPORT_SYMBOL(hci_find_ltk); | |
1269 | ||
c9839a11 | 1270 | struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr, |
04124681 | 1271 | u8 addr_type) |
75d262c2 | 1272 | { |
c9839a11 | 1273 | struct smp_ltk *k; |
75d262c2 | 1274 | |
c9839a11 VCG |
1275 | list_for_each_entry(k, &hdev->long_term_keys, list) |
1276 | if (addr_type == k->bdaddr_type && | |
1277 | bacmp(bdaddr, &k->bdaddr) == 0) | |
75d262c2 VCG |
1278 | return k; |
1279 | ||
1280 | return NULL; | |
1281 | } | |
c9839a11 | 1282 | EXPORT_SYMBOL(hci_find_ltk_by_addr); |
75d262c2 | 1283 | |
d25e28ab | 1284 | int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key, |
04124681 | 1285 | bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len) |
55ed8ca1 JH |
1286 | { |
1287 | struct link_key *key, *old_key; | |
745c0ce3 VA |
1288 | u8 old_key_type; |
1289 | bool persistent; | |
55ed8ca1 JH |
1290 | |
1291 | old_key = hci_find_link_key(hdev, bdaddr); | |
1292 | if (old_key) { | |
1293 | old_key_type = old_key->type; | |
1294 | key = old_key; | |
1295 | } else { | |
12adcf3a | 1296 | old_key_type = conn ? conn->key_type : 0xff; |
55ed8ca1 JH |
1297 | key = kzalloc(sizeof(*key), GFP_ATOMIC); |
1298 | if (!key) | |
1299 | return -ENOMEM; | |
1300 | list_add(&key->list, &hdev->link_keys); | |
1301 | } | |
1302 | ||
1303 | BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type); | |
1304 | ||
d25e28ab JH |
1305 | /* Some buggy controller combinations generate a changed |
1306 | * combination key for legacy pairing even when there's no | |
1307 | * previous key */ | |
1308 | if (type == HCI_LK_CHANGED_COMBINATION && | |
1309 | (!conn || conn->remote_auth == 0xff) && | |
655fe6ec | 1310 | old_key_type == 0xff) { |
d25e28ab | 1311 | type = HCI_LK_COMBINATION; |
655fe6ec JH |
1312 | if (conn) |
1313 | conn->key_type = type; | |
1314 | } | |
d25e28ab | 1315 | |
55ed8ca1 JH |
1316 | bacpy(&key->bdaddr, bdaddr); |
1317 | memcpy(key->val, val, 16); | |
55ed8ca1 JH |
1318 | key->pin_len = pin_len; |
1319 | ||
b6020ba0 | 1320 | if (type == HCI_LK_CHANGED_COMBINATION) |
55ed8ca1 | 1321 | key->type = old_key_type; |
4748fed2 JH |
1322 | else |
1323 | key->type = type; | |
1324 | ||
4df378a1 JH |
1325 | if (!new_key) |
1326 | return 0; | |
1327 | ||
1328 | persistent = hci_persistent_key(hdev, conn, type, old_key_type); | |
1329 | ||
744cf19e | 1330 | mgmt_new_link_key(hdev, key, persistent); |
4df378a1 | 1331 | |
6ec5bcad VA |
1332 | if (conn) |
1333 | conn->flush_key = !persistent; | |
55ed8ca1 JH |
1334 | |
1335 | return 0; | |
1336 | } | |
1337 | ||
c9839a11 | 1338 | int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type, |
04124681 GP |
1339 | int new_key, u8 authenticated, u8 tk[16], u8 enc_size, u16 |
1340 | ediv, u8 rand[8]) | |
75d262c2 | 1341 | { |
c9839a11 | 1342 | struct smp_ltk *key, *old_key; |
75d262c2 | 1343 | |
c9839a11 VCG |
1344 | if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK)) |
1345 | return 0; | |
75d262c2 | 1346 | |
c9839a11 VCG |
1347 | old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type); |
1348 | if (old_key) | |
75d262c2 | 1349 | key = old_key; |
c9839a11 VCG |
1350 | else { |
1351 | key = kzalloc(sizeof(*key), GFP_ATOMIC); | |
75d262c2 VCG |
1352 | if (!key) |
1353 | return -ENOMEM; | |
c9839a11 | 1354 | list_add(&key->list, &hdev->long_term_keys); |
75d262c2 VCG |
1355 | } |
1356 | ||
75d262c2 | 1357 | bacpy(&key->bdaddr, bdaddr); |
c9839a11 VCG |
1358 | key->bdaddr_type = addr_type; |
1359 | memcpy(key->val, tk, sizeof(key->val)); | |
1360 | key->authenticated = authenticated; | |
1361 | key->ediv = ediv; | |
1362 | key->enc_size = enc_size; | |
1363 | key->type = type; | |
1364 | memcpy(key->rand, rand, sizeof(key->rand)); | |
75d262c2 | 1365 | |
c9839a11 VCG |
1366 | if (!new_key) |
1367 | return 0; | |
75d262c2 | 1368 | |
261cc5aa VCG |
1369 | if (type & HCI_SMP_LTK) |
1370 | mgmt_new_ltk(hdev, key, 1); | |
1371 | ||
75d262c2 VCG |
1372 | return 0; |
1373 | } | |
1374 | ||
55ed8ca1 JH |
1375 | int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1376 | { | |
1377 | struct link_key *key; | |
1378 | ||
1379 | key = hci_find_link_key(hdev, bdaddr); | |
1380 | if (!key) | |
1381 | return -ENOENT; | |
1382 | ||
1383 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1384 | ||
1385 | list_del(&key->list); | |
1386 | kfree(key); | |
1387 | ||
1388 | return 0; | |
1389 | } | |
1390 | ||
b899efaf VCG |
1391 | int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1392 | { | |
1393 | struct smp_ltk *k, *tmp; | |
1394 | ||
1395 | list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) { | |
1396 | if (bacmp(bdaddr, &k->bdaddr)) | |
1397 | continue; | |
1398 | ||
1399 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1400 | ||
1401 | list_del(&k->list); | |
1402 | kfree(k); | |
1403 | } | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
6bd32326 VT |
1408 | /* HCI command timer function */ |
1409 | static void hci_cmd_timer(unsigned long arg) | |
1410 | { | |
1411 | struct hci_dev *hdev = (void *) arg; | |
1412 | ||
1413 | BT_ERR("%s command tx timeout", hdev->name); | |
1414 | atomic_set(&hdev->cmd_cnt, 1); | |
c347b765 | 1415 | queue_work(hdev->workqueue, &hdev->cmd_work); |
6bd32326 VT |
1416 | } |
1417 | ||
2763eda6 | 1418 | struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev, |
04124681 | 1419 | bdaddr_t *bdaddr) |
2763eda6 SJ |
1420 | { |
1421 | struct oob_data *data; | |
1422 | ||
1423 | list_for_each_entry(data, &hdev->remote_oob_data, list) | |
1424 | if (bacmp(bdaddr, &data->bdaddr) == 0) | |
1425 | return data; | |
1426 | ||
1427 | return NULL; | |
1428 | } | |
1429 | ||
1430 | int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1431 | { | |
1432 | struct oob_data *data; | |
1433 | ||
1434 | data = hci_find_remote_oob_data(hdev, bdaddr); | |
1435 | if (!data) | |
1436 | return -ENOENT; | |
1437 | ||
1438 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1439 | ||
1440 | list_del(&data->list); | |
1441 | kfree(data); | |
1442 | ||
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | int hci_remote_oob_data_clear(struct hci_dev *hdev) | |
1447 | { | |
1448 | struct oob_data *data, *n; | |
1449 | ||
1450 | list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) { | |
1451 | list_del(&data->list); | |
1452 | kfree(data); | |
1453 | } | |
1454 | ||
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash, | |
04124681 | 1459 | u8 *randomizer) |
2763eda6 SJ |
1460 | { |
1461 | struct oob_data *data; | |
1462 | ||
1463 | data = hci_find_remote_oob_data(hdev, bdaddr); | |
1464 | ||
1465 | if (!data) { | |
1466 | data = kmalloc(sizeof(*data), GFP_ATOMIC); | |
1467 | if (!data) | |
1468 | return -ENOMEM; | |
1469 | ||
1470 | bacpy(&data->bdaddr, bdaddr); | |
1471 | list_add(&data->list, &hdev->remote_oob_data); | |
1472 | } | |
1473 | ||
1474 | memcpy(data->hash, hash, sizeof(data->hash)); | |
1475 | memcpy(data->randomizer, randomizer, sizeof(data->randomizer)); | |
1476 | ||
1477 | BT_DBG("%s for %s", hdev->name, batostr(bdaddr)); | |
1478 | ||
1479 | return 0; | |
1480 | } | |
1481 | ||
04124681 | 1482 | struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) |
b2a66aad | 1483 | { |
8035ded4 | 1484 | struct bdaddr_list *b; |
b2a66aad | 1485 | |
8035ded4 | 1486 | list_for_each_entry(b, &hdev->blacklist, list) |
b2a66aad AJ |
1487 | if (bacmp(bdaddr, &b->bdaddr) == 0) |
1488 | return b; | |
b2a66aad AJ |
1489 | |
1490 | return NULL; | |
1491 | } | |
1492 | ||
1493 | int hci_blacklist_clear(struct hci_dev *hdev) | |
1494 | { | |
1495 | struct list_head *p, *n; | |
1496 | ||
1497 | list_for_each_safe(p, n, &hdev->blacklist) { | |
1498 | struct bdaddr_list *b; | |
1499 | ||
1500 | b = list_entry(p, struct bdaddr_list, list); | |
1501 | ||
1502 | list_del(p); | |
1503 | kfree(b); | |
1504 | } | |
1505 | ||
1506 | return 0; | |
1507 | } | |
1508 | ||
88c1fe4b | 1509 | int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
b2a66aad AJ |
1510 | { |
1511 | struct bdaddr_list *entry; | |
b2a66aad AJ |
1512 | |
1513 | if (bacmp(bdaddr, BDADDR_ANY) == 0) | |
1514 | return -EBADF; | |
1515 | ||
5e762444 AJ |
1516 | if (hci_blacklist_lookup(hdev, bdaddr)) |
1517 | return -EEXIST; | |
b2a66aad AJ |
1518 | |
1519 | entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL); | |
5e762444 AJ |
1520 | if (!entry) |
1521 | return -ENOMEM; | |
b2a66aad AJ |
1522 | |
1523 | bacpy(&entry->bdaddr, bdaddr); | |
1524 | ||
1525 | list_add(&entry->list, &hdev->blacklist); | |
1526 | ||
88c1fe4b | 1527 | return mgmt_device_blocked(hdev, bdaddr, type); |
b2a66aad AJ |
1528 | } |
1529 | ||
88c1fe4b | 1530 | int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
b2a66aad AJ |
1531 | { |
1532 | struct bdaddr_list *entry; | |
b2a66aad | 1533 | |
1ec918ce | 1534 | if (bacmp(bdaddr, BDADDR_ANY) == 0) |
5e762444 | 1535 | return hci_blacklist_clear(hdev); |
b2a66aad AJ |
1536 | |
1537 | entry = hci_blacklist_lookup(hdev, bdaddr); | |
1ec918ce | 1538 | if (!entry) |
5e762444 | 1539 | return -ENOENT; |
b2a66aad AJ |
1540 | |
1541 | list_del(&entry->list); | |
1542 | kfree(entry); | |
1543 | ||
88c1fe4b | 1544 | return mgmt_device_unblocked(hdev, bdaddr, type); |
b2a66aad AJ |
1545 | } |
1546 | ||
db323f2f | 1547 | static void hci_clear_adv_cache(struct work_struct *work) |
35815085 | 1548 | { |
db323f2f | 1549 | struct hci_dev *hdev = container_of(work, struct hci_dev, |
04124681 | 1550 | adv_work.work); |
35815085 AG |
1551 | |
1552 | hci_dev_lock(hdev); | |
1553 | ||
1554 | hci_adv_entries_clear(hdev); | |
1555 | ||
1556 | hci_dev_unlock(hdev); | |
1557 | } | |
1558 | ||
76c8686f AG |
1559 | int hci_adv_entries_clear(struct hci_dev *hdev) |
1560 | { | |
1561 | struct adv_entry *entry, *tmp; | |
1562 | ||
1563 | list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) { | |
1564 | list_del(&entry->list); | |
1565 | kfree(entry); | |
1566 | } | |
1567 | ||
1568 | BT_DBG("%s adv cache cleared", hdev->name); | |
1569 | ||
1570 | return 0; | |
1571 | } | |
1572 | ||
1573 | struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1574 | { | |
1575 | struct adv_entry *entry; | |
1576 | ||
1577 | list_for_each_entry(entry, &hdev->adv_entries, list) | |
1578 | if (bacmp(bdaddr, &entry->bdaddr) == 0) | |
1579 | return entry; | |
1580 | ||
1581 | return NULL; | |
1582 | } | |
1583 | ||
1584 | static inline int is_connectable_adv(u8 evt_type) | |
1585 | { | |
1586 | if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND) | |
1587 | return 1; | |
1588 | ||
1589 | return 0; | |
1590 | } | |
1591 | ||
1592 | int hci_add_adv_entry(struct hci_dev *hdev, | |
04124681 | 1593 | struct hci_ev_le_advertising_info *ev) { struct adv_entry *entry; if (!is_connectable_adv(ev->evt_type)) |
76c8686f AG |
1594 | return -EINVAL; |
1595 | ||
1596 | /* Only new entries should be added to adv_entries. So, if | |
1597 | * bdaddr was found, don't add it. */ | |
1598 | if (hci_find_adv_entry(hdev, &ev->bdaddr)) | |
1599 | return 0; | |
1600 | ||
4777bfde | 1601 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
76c8686f AG |
1602 | if (!entry) |
1603 | return -ENOMEM; | |
1604 | ||
1605 | bacpy(&entry->bdaddr, &ev->bdaddr); | |
1606 | entry->bdaddr_type = ev->bdaddr_type; | |
1607 | ||
1608 | list_add(&entry->list, &hdev->adv_entries); | |
1609 | ||
1610 | BT_DBG("%s adv entry added: address %s type %u", hdev->name, | |
1611 | batostr(&entry->bdaddr), entry->bdaddr_type); | |
1612 | ||
1613 | return 0; | |
1614 | } | |
1615 | ||
7ba8b4be AG |
1616 | static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt) |
1617 | { | |
1618 | struct le_scan_params *param = (struct le_scan_params *) opt; | |
1619 | struct hci_cp_le_set_scan_param cp; | |
1620 | ||
1621 | memset(&cp, 0, sizeof(cp)); | |
1622 | cp.type = param->type; | |
1623 | cp.interval = cpu_to_le16(param->interval); | |
1624 | cp.window = cpu_to_le16(param->window); | |
1625 | ||
1626 | hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp); | |
1627 | } | |
1628 | ||
1629 | static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt) | |
1630 | { | |
1631 | struct hci_cp_le_set_scan_enable cp; | |
1632 | ||
1633 | memset(&cp, 0, sizeof(cp)); | |
1634 | cp.enable = 1; | |
1635 | ||
1636 | hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp); | |
1637 | } | |
1638 | ||
1639 | static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval, | |
04124681 | 1640 | u16 window, int timeout) |
7ba8b4be AG |
1641 | { |
1642 | long timeo = msecs_to_jiffies(3000); | |
1643 | struct le_scan_params param; | |
1644 | int err; | |
1645 | ||
1646 | BT_DBG("%s", hdev->name); | |
1647 | ||
1648 | if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) | |
1649 | return -EINPROGRESS; | |
1650 | ||
1651 | param.type = type; | |
1652 | param.interval = interval; | |
1653 | param.window = window; | |
1654 | ||
1655 | hci_req_lock(hdev); | |
1656 | ||
1657 | err = __hci_request(hdev, le_scan_param_req, (unsigned long) ¶m, | |
04124681 | 1658 | timeo); |
7ba8b4be AG |
1659 | if (!err) |
1660 | err = __hci_request(hdev, le_scan_enable_req, 0, timeo); | |
1661 | ||
1662 | hci_req_unlock(hdev); | |
1663 | ||
1664 | if (err < 0) | |
1665 | return err; | |
1666 | ||
1667 | schedule_delayed_work(&hdev->le_scan_disable, | |
04124681 | 1668 | msecs_to_jiffies(timeout)); |
7ba8b4be AG |
1669 | |
1670 | return 0; | |
1671 | } | |
1672 | ||
1673 | static void le_scan_disable_work(struct work_struct *work) | |
1674 | { | |
1675 | struct hci_dev *hdev = container_of(work, struct hci_dev, | |
04124681 | 1676 | le_scan_disable.work); |
7ba8b4be AG |
1677 | struct hci_cp_le_set_scan_enable cp; |
1678 | ||
1679 | BT_DBG("%s", hdev->name); | |
1680 | ||
1681 | memset(&cp, 0, sizeof(cp)); | |
1682 | ||
1683 | hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp); | |
1684 | } | |
1685 | ||
28b75a89 AG |
1686 | static void le_scan_work(struct work_struct *work) |
1687 | { | |
1688 | struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan); | |
1689 | struct le_scan_params *param = &hdev->le_scan_params; | |
1690 | ||
1691 | BT_DBG("%s", hdev->name); | |
1692 | ||
04124681 GP |
1693 | hci_do_le_scan(hdev, param->type, param->interval, param->window, |
1694 | param->timeout); | |
28b75a89 AG |
1695 | } |
1696 | ||
1697 | int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window, | |
04124681 | 1698 | int timeout) |
28b75a89 AG |
1699 | { |
1700 | struct le_scan_params *param = &hdev->le_scan_params; | |
1701 | ||
1702 | BT_DBG("%s", hdev->name); | |
1703 | ||
1704 | if (work_busy(&hdev->le_scan)) | |
1705 | return -EINPROGRESS; | |
1706 | ||
1707 | param->type = type; | |
1708 | param->interval = interval; | |
1709 | param->window = window; | |
1710 | param->timeout = timeout; | |
1711 | ||
1712 | queue_work(system_long_wq, &hdev->le_scan); | |
1713 | ||
1714 | return 0; | |
1715 | } | |
1716 | ||
1da177e4 LT |
1717 | /* Register HCI device */ |
1718 | int hci_register_dev(struct hci_dev *hdev) | |
1719 | { | |
1720 | struct list_head *head = &hci_dev_list, *p; | |
08add513 | 1721 | int i, id, error; |
1da177e4 | 1722 | |
e9b9cfa1 | 1723 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
1da177e4 | 1724 | |
010666a1 | 1725 | if (!hdev->open || !hdev->close) |
1da177e4 LT |
1726 | return -EINVAL; |
1727 | ||
08add513 MM |
1728 | /* Do not allow HCI_AMP devices to register at index 0, |
1729 | * so the index can be used as the AMP controller ID. | |
1730 | */ | |
1731 | id = (hdev->dev_type == HCI_BREDR) ? 0 : 1; | |
1732 | ||
f20d09d5 | 1733 | write_lock(&hci_dev_list_lock); |
1da177e4 LT |
1734 | |
1735 | /* Find first available device id */ | |
1736 | list_for_each(p, &hci_dev_list) { | |
1737 | if (list_entry(p, struct hci_dev, list)->id != id) | |
1738 | break; | |
1739 | head = p; id++; | |
1740 | } | |
8e87d142 | 1741 | |
1da177e4 LT |
1742 | sprintf(hdev->name, "hci%d", id); |
1743 | hdev->id = id; | |
c6feeb28 | 1744 | list_add_tail(&hdev->list, head); |
1da177e4 | 1745 | |
09fd0de5 | 1746 | mutex_init(&hdev->lock); |
1da177e4 LT |
1747 | |
1748 | hdev->flags = 0; | |
d23264a8 | 1749 | hdev->dev_flags = 0; |
1da177e4 | 1750 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); |
5b7f9909 | 1751 | hdev->esco_type = (ESCO_HV1); |
1da177e4 | 1752 | hdev->link_mode = (HCI_LM_ACCEPT); |
17fa4b9d | 1753 | hdev->io_capability = 0x03; /* No Input No Output */ |
1da177e4 | 1754 | |
04837f64 MH |
1755 | hdev->idle_timeout = 0; |
1756 | hdev->sniff_max_interval = 800; | |
1757 | hdev->sniff_min_interval = 80; | |
1758 | ||
b78752cc | 1759 | INIT_WORK(&hdev->rx_work, hci_rx_work); |
c347b765 | 1760 | INIT_WORK(&hdev->cmd_work, hci_cmd_work); |
3eff45ea | 1761 | INIT_WORK(&hdev->tx_work, hci_tx_work); |
b78752cc | 1762 | |
1da177e4 LT |
1763 | |
1764 | skb_queue_head_init(&hdev->rx_q); | |
1765 | skb_queue_head_init(&hdev->cmd_q); | |
1766 | skb_queue_head_init(&hdev->raw_q); | |
1767 | ||
6bd32326 VT |
1768 | setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev); |
1769 | ||
cd4c5391 | 1770 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1771 | hdev->reassembly[i] = NULL; |
1772 | ||
1da177e4 | 1773 | init_waitqueue_head(&hdev->req_wait_q); |
a6a67efd | 1774 | mutex_init(&hdev->req_lock); |
1da177e4 | 1775 | |
30883512 | 1776 | discovery_init(hdev); |
1da177e4 LT |
1777 | |
1778 | hci_conn_hash_init(hdev); | |
1779 | ||
2e58ef3e JH |
1780 | INIT_LIST_HEAD(&hdev->mgmt_pending); |
1781 | ||
ea4bd8ba | 1782 | INIT_LIST_HEAD(&hdev->blacklist); |
f0358568 | 1783 | |
2aeb9a1a JH |
1784 | INIT_LIST_HEAD(&hdev->uuids); |
1785 | ||
55ed8ca1 | 1786 | INIT_LIST_HEAD(&hdev->link_keys); |
b899efaf | 1787 | INIT_LIST_HEAD(&hdev->long_term_keys); |
55ed8ca1 | 1788 | |
2763eda6 SJ |
1789 | INIT_LIST_HEAD(&hdev->remote_oob_data); |
1790 | ||
76c8686f AG |
1791 | INIT_LIST_HEAD(&hdev->adv_entries); |
1792 | ||
db323f2f | 1793 | INIT_DELAYED_WORK(&hdev->adv_work, hci_clear_adv_cache); |
ab81cbf9 | 1794 | INIT_WORK(&hdev->power_on, hci_power_on); |
3243553f | 1795 | INIT_DELAYED_WORK(&hdev->power_off, hci_power_off); |
ab81cbf9 | 1796 | |
16ab91ab JH |
1797 | INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off); |
1798 | ||
1da177e4 LT |
1799 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
1800 | ||
1801 | atomic_set(&hdev->promisc, 0); | |
1802 | ||
28b75a89 AG |
1803 | INIT_WORK(&hdev->le_scan, le_scan_work); |
1804 | ||
7ba8b4be AG |
1805 | INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work); |
1806 | ||
f20d09d5 | 1807 | write_unlock(&hci_dev_list_lock); |
1da177e4 | 1808 | |
32845eb1 GP |
1809 | hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND | |
1810 | WQ_MEM_RECLAIM, 1); | |
33ca954d DH |
1811 | if (!hdev->workqueue) { |
1812 | error = -ENOMEM; | |
1813 | goto err; | |
1814 | } | |
f48fd9c8 | 1815 | |
33ca954d DH |
1816 | error = hci_add_sysfs(hdev); |
1817 | if (error < 0) | |
1818 | goto err_wqueue; | |
1da177e4 | 1819 | |
611b30f7 MH |
1820 | hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
1821 | RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev); | |
1822 | if (hdev->rfkill) { | |
1823 | if (rfkill_register(hdev->rfkill) < 0) { | |
1824 | rfkill_destroy(hdev->rfkill); | |
1825 | hdev->rfkill = NULL; | |
1826 | } | |
1827 | } | |
1828 | ||
a8b2d5c2 JH |
1829 | set_bit(HCI_AUTO_OFF, &hdev->dev_flags); |
1830 | set_bit(HCI_SETUP, &hdev->dev_flags); | |
7f971041 | 1831 | schedule_work(&hdev->power_on); |
ab81cbf9 | 1832 | |
1da177e4 | 1833 | hci_notify(hdev, HCI_DEV_REG); |
dc946bd8 | 1834 | hci_dev_hold(hdev); |
1da177e4 LT |
1835 | |
1836 | return id; | |
f48fd9c8 | 1837 | |
33ca954d DH |
1838 | err_wqueue: |
1839 | destroy_workqueue(hdev->workqueue); | |
1840 | err: | |
f20d09d5 | 1841 | write_lock(&hci_dev_list_lock); |
f48fd9c8 | 1842 | list_del(&hdev->list); |
f20d09d5 | 1843 | write_unlock(&hci_dev_list_lock); |
f48fd9c8 | 1844 | |
33ca954d | 1845 | return error; |
1da177e4 LT |
1846 | } |
1847 | EXPORT_SYMBOL(hci_register_dev); | |
1848 | ||
1849 | /* Unregister HCI device */ | |
59735631 | 1850 | void hci_unregister_dev(struct hci_dev *hdev) |
1da177e4 | 1851 | { |
ef222013 MH |
1852 | int i; |
1853 | ||
c13854ce | 1854 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
1da177e4 | 1855 | |
94324962 JH |
1856 | set_bit(HCI_UNREGISTER, &hdev->dev_flags); |
1857 | ||
f20d09d5 | 1858 | write_lock(&hci_dev_list_lock); |
1da177e4 | 1859 | list_del(&hdev->list); |
f20d09d5 | 1860 | write_unlock(&hci_dev_list_lock); |
1da177e4 LT |
1861 | |
1862 | hci_dev_do_close(hdev); | |
1863 | ||
cd4c5391 | 1864 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1865 | kfree_skb(hdev->reassembly[i]); |
1866 | ||
ab81cbf9 | 1867 | if (!test_bit(HCI_INIT, &hdev->flags) && |
a8b2d5c2 | 1868 | !test_bit(HCI_SETUP, &hdev->dev_flags)) { |
09fd0de5 | 1869 | hci_dev_lock(hdev); |
744cf19e | 1870 | mgmt_index_removed(hdev); |
09fd0de5 | 1871 | hci_dev_unlock(hdev); |
56e5cb86 | 1872 | } |
ab81cbf9 | 1873 | |
2e58ef3e JH |
1874 | /* mgmt_index_removed should take care of emptying the |
1875 | * pending list */ | |
1876 | BUG_ON(!list_empty(&hdev->mgmt_pending)); | |
1877 | ||
1da177e4 LT |
1878 | hci_notify(hdev, HCI_DEV_UNREG); |
1879 | ||
611b30f7 MH |
1880 | if (hdev->rfkill) { |
1881 | rfkill_unregister(hdev->rfkill); | |
1882 | rfkill_destroy(hdev->rfkill); | |
1883 | } | |
1884 | ||
ce242970 | 1885 | hci_del_sysfs(hdev); |
147e2d59 | 1886 | |
db323f2f | 1887 | cancel_delayed_work_sync(&hdev->adv_work); |
c6f3c5f7 | 1888 | |
f48fd9c8 MH |
1889 | destroy_workqueue(hdev->workqueue); |
1890 | ||
09fd0de5 | 1891 | hci_dev_lock(hdev); |
e2e0cacb | 1892 | hci_blacklist_clear(hdev); |
2aeb9a1a | 1893 | hci_uuids_clear(hdev); |
55ed8ca1 | 1894 | hci_link_keys_clear(hdev); |
b899efaf | 1895 | hci_smp_ltks_clear(hdev); |
2763eda6 | 1896 | hci_remote_oob_data_clear(hdev); |
76c8686f | 1897 | hci_adv_entries_clear(hdev); |
09fd0de5 | 1898 | hci_dev_unlock(hdev); |
e2e0cacb | 1899 | |
dc946bd8 | 1900 | hci_dev_put(hdev); |
1da177e4 LT |
1901 | } |
1902 | EXPORT_SYMBOL(hci_unregister_dev); | |
1903 | ||
1904 | /* Suspend HCI device */ | |
1905 | int hci_suspend_dev(struct hci_dev *hdev) | |
1906 | { | |
1907 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
1908 | return 0; | |
1909 | } | |
1910 | EXPORT_SYMBOL(hci_suspend_dev); | |
1911 | ||
1912 | /* Resume HCI device */ | |
1913 | int hci_resume_dev(struct hci_dev *hdev) | |
1914 | { | |
1915 | hci_notify(hdev, HCI_DEV_RESUME); | |
1916 | return 0; | |
1917 | } | |
1918 | EXPORT_SYMBOL(hci_resume_dev); | |
1919 | ||
76bca880 MH |
1920 | /* Receive frame from HCI drivers */ |
1921 | int hci_recv_frame(struct sk_buff *skb) | |
1922 | { | |
1923 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1924 | if (!hdev || (!test_bit(HCI_UP, &hdev->flags) | |
1925 | && !test_bit(HCI_INIT, &hdev->flags))) { | |
1926 | kfree_skb(skb); | |
1927 | return -ENXIO; | |
1928 | } | |
1929 | ||
1930 | /* Incomming skb */ | |
1931 | bt_cb(skb)->incoming = 1; | |
1932 | ||
1933 | /* Time stamp */ | |
1934 | __net_timestamp(skb); | |
1935 | ||
76bca880 | 1936 | skb_queue_tail(&hdev->rx_q, skb); |
b78752cc | 1937 | queue_work(hdev->workqueue, &hdev->rx_work); |
c78ae283 | 1938 | |
76bca880 MH |
1939 | return 0; |
1940 | } | |
1941 | EXPORT_SYMBOL(hci_recv_frame); | |
1942 | ||
33e882a5 | 1943 | static int hci_reassembly(struct hci_dev *hdev, int type, void *data, |
1e429f38 | 1944 | int count, __u8 index) |
33e882a5 SS |
1945 | { |
1946 | int len = 0; | |
1947 | int hlen = 0; | |
1948 | int remain = count; | |
1949 | struct sk_buff *skb; | |
1950 | struct bt_skb_cb *scb; | |
1951 | ||
1952 | if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) || | |
1953 | index >= NUM_REASSEMBLY) | |
1954 | return -EILSEQ; | |
1955 | ||
1956 | skb = hdev->reassembly[index]; | |
1957 | ||
1958 | if (!skb) { | |
1959 | switch (type) { | |
1960 | case HCI_ACLDATA_PKT: | |
1961 | len = HCI_MAX_FRAME_SIZE; | |
1962 | hlen = HCI_ACL_HDR_SIZE; | |
1963 | break; | |
1964 | case HCI_EVENT_PKT: | |
1965 | len = HCI_MAX_EVENT_SIZE; | |
1966 | hlen = HCI_EVENT_HDR_SIZE; | |
1967 | break; | |
1968 | case HCI_SCODATA_PKT: | |
1969 | len = HCI_MAX_SCO_SIZE; | |
1970 | hlen = HCI_SCO_HDR_SIZE; | |
1971 | break; | |
1972 | } | |
1973 | ||
1e429f38 | 1974 | skb = bt_skb_alloc(len, GFP_ATOMIC); |
33e882a5 SS |
1975 | if (!skb) |
1976 | return -ENOMEM; | |
1977 | ||
1978 | scb = (void *) skb->cb; | |
1979 | scb->expect = hlen; | |
1980 | scb->pkt_type = type; | |
1981 | ||
1982 | skb->dev = (void *) hdev; | |
1983 | hdev->reassembly[index] = skb; | |
1984 | } | |
1985 | ||
1986 | while (count) { | |
1987 | scb = (void *) skb->cb; | |
89bb46d0 | 1988 | len = min_t(uint, scb->expect, count); |
33e882a5 SS |
1989 | |
1990 | memcpy(skb_put(skb, len), data, len); | |
1991 | ||
1992 | count -= len; | |
1993 | data += len; | |
1994 | scb->expect -= len; | |
1995 | remain = count; | |
1996 | ||
1997 | switch (type) { | |
1998 | case HCI_EVENT_PKT: | |
1999 | if (skb->len == HCI_EVENT_HDR_SIZE) { | |
2000 | struct hci_event_hdr *h = hci_event_hdr(skb); | |
2001 | scb->expect = h->plen; | |
2002 | ||
2003 | if (skb_tailroom(skb) < scb->expect) { | |
2004 | kfree_skb(skb); | |
2005 | hdev->reassembly[index] = NULL; | |
2006 | return -ENOMEM; | |
2007 | } | |
2008 | } | |
2009 | break; | |
2010 | ||
2011 | case HCI_ACLDATA_PKT: | |
2012 | if (skb->len == HCI_ACL_HDR_SIZE) { | |
2013 | struct hci_acl_hdr *h = hci_acl_hdr(skb); | |
2014 | scb->expect = __le16_to_cpu(h->dlen); | |
2015 | ||
2016 | if (skb_tailroom(skb) < scb->expect) { | |
2017 | kfree_skb(skb); | |
2018 | hdev->reassembly[index] = NULL; | |
2019 | return -ENOMEM; | |
2020 | } | |
2021 | } | |
2022 | break; | |
2023 | ||
2024 | case HCI_SCODATA_PKT: | |
2025 | if (skb->len == HCI_SCO_HDR_SIZE) { | |
2026 | struct hci_sco_hdr *h = hci_sco_hdr(skb); | |
2027 | scb->expect = h->dlen; | |
2028 | ||
2029 | if (skb_tailroom(skb) < scb->expect) { | |
2030 | kfree_skb(skb); | |
2031 | hdev->reassembly[index] = NULL; | |
2032 | return -ENOMEM; | |
2033 | } | |
2034 | } | |
2035 | break; | |
2036 | } | |
2037 | ||
2038 | if (scb->expect == 0) { | |
2039 | /* Complete frame */ | |
2040 | ||
2041 | bt_cb(skb)->pkt_type = type; | |
2042 | hci_recv_frame(skb); | |
2043 | ||
2044 | hdev->reassembly[index] = NULL; | |
2045 | return remain; | |
2046 | } | |
2047 | } | |
2048 | ||
2049 | return remain; | |
2050 | } | |
2051 | ||
ef222013 MH |
2052 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) |
2053 | { | |
f39a3c06 SS |
2054 | int rem = 0; |
2055 | ||
ef222013 MH |
2056 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) |
2057 | return -EILSEQ; | |
2058 | ||
da5f6c37 | 2059 | while (count) { |
1e429f38 | 2060 | rem = hci_reassembly(hdev, type, data, count, type - 1); |
f39a3c06 SS |
2061 | if (rem < 0) |
2062 | return rem; | |
ef222013 | 2063 | |
f39a3c06 SS |
2064 | data += (count - rem); |
2065 | count = rem; | |
f81c6224 | 2066 | } |
ef222013 | 2067 | |
f39a3c06 | 2068 | return rem; |
ef222013 MH |
2069 | } |
2070 | EXPORT_SYMBOL(hci_recv_fragment); | |
2071 | ||
99811510 SS |
2072 | #define STREAM_REASSEMBLY 0 |
2073 | ||
2074 | int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count) | |
2075 | { | |
2076 | int type; | |
2077 | int rem = 0; | |
2078 | ||
da5f6c37 | 2079 | while (count) { |
99811510 SS |
2080 | struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY]; |
2081 | ||
2082 | if (!skb) { | |
2083 | struct { char type; } *pkt; | |
2084 | ||
2085 | /* Start of the frame */ | |
2086 | pkt = data; | |
2087 | type = pkt->type; | |
2088 | ||
2089 | data++; | |
2090 | count--; | |
2091 | } else | |
2092 | type = bt_cb(skb)->pkt_type; | |
2093 | ||
1e429f38 GP |
2094 | rem = hci_reassembly(hdev, type, data, count, |
2095 | STREAM_REASSEMBLY); | |
99811510 SS |
2096 | if (rem < 0) |
2097 | return rem; | |
2098 | ||
2099 | data += (count - rem); | |
2100 | count = rem; | |
f81c6224 | 2101 | } |
99811510 SS |
2102 | |
2103 | return rem; | |
2104 | } | |
2105 | EXPORT_SYMBOL(hci_recv_stream_fragment); | |
2106 | ||
1da177e4 LT |
2107 | /* ---- Interface to upper protocols ---- */ |
2108 | ||
1da177e4 LT |
2109 | int hci_register_cb(struct hci_cb *cb) |
2110 | { | |
2111 | BT_DBG("%p name %s", cb, cb->name); | |
2112 | ||
f20d09d5 | 2113 | write_lock(&hci_cb_list_lock); |
1da177e4 | 2114 | list_add(&cb->list, &hci_cb_list); |
f20d09d5 | 2115 | write_unlock(&hci_cb_list_lock); |
1da177e4 LT |
2116 | |
2117 | return 0; | |
2118 | } | |
2119 | EXPORT_SYMBOL(hci_register_cb); | |
2120 | ||
2121 | int hci_unregister_cb(struct hci_cb *cb) | |
2122 | { | |
2123 | BT_DBG("%p name %s", cb, cb->name); | |
2124 | ||
f20d09d5 | 2125 | write_lock(&hci_cb_list_lock); |
1da177e4 | 2126 | list_del(&cb->list); |
f20d09d5 | 2127 | write_unlock(&hci_cb_list_lock); |
1da177e4 LT |
2128 | |
2129 | return 0; | |
2130 | } | |
2131 | EXPORT_SYMBOL(hci_unregister_cb); | |
2132 | ||
2133 | static int hci_send_frame(struct sk_buff *skb) | |
2134 | { | |
2135 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
2136 | ||
2137 | if (!hdev) { | |
2138 | kfree_skb(skb); | |
2139 | return -ENODEV; | |
2140 | } | |
2141 | ||
0d48d939 | 2142 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 | 2143 | |
cd82e61c MH |
2144 | /* Time stamp */ |
2145 | __net_timestamp(skb); | |
1da177e4 | 2146 | |
cd82e61c MH |
2147 | /* Send copy to monitor */ |
2148 | hci_send_to_monitor(hdev, skb); | |
2149 | ||
2150 | if (atomic_read(&hdev->promisc)) { | |
2151 | /* Send copy to the sockets */ | |
470fe1b5 | 2152 | hci_send_to_sock(hdev, skb); |
1da177e4 LT |
2153 | } |
2154 | ||
2155 | /* Get rid of skb owner, prior to sending to the driver. */ | |
2156 | skb_orphan(skb); | |
2157 | ||
2158 | return hdev->send(skb); | |
2159 | } | |
2160 | ||
2161 | /* Send HCI command */ | |
a9de9248 | 2162 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
2163 | { |
2164 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
2165 | struct hci_command_hdr *hdr; | |
2166 | struct sk_buff *skb; | |
2167 | ||
a9de9248 | 2168 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
2169 | |
2170 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
2171 | if (!skb) { | |
ef222013 | 2172 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
2173 | return -ENOMEM; |
2174 | } | |
2175 | ||
2176 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 2177 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
2178 | hdr->plen = plen; |
2179 | ||
2180 | if (plen) | |
2181 | memcpy(skb_put(skb, plen), param, plen); | |
2182 | ||
2183 | BT_DBG("skb len %d", skb->len); | |
2184 | ||
0d48d939 | 2185 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 2186 | skb->dev = (void *) hdev; |
c78ae283 | 2187 | |
a5040efa JH |
2188 | if (test_bit(HCI_INIT, &hdev->flags)) |
2189 | hdev->init_last_cmd = opcode; | |
2190 | ||
1da177e4 | 2191 | skb_queue_tail(&hdev->cmd_q, skb); |
c347b765 | 2192 | queue_work(hdev->workqueue, &hdev->cmd_work); |
1da177e4 LT |
2193 | |
2194 | return 0; | |
2195 | } | |
1da177e4 LT |
2196 | |
2197 | /* Get data from the previously sent command */ | |
a9de9248 | 2198 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
2199 | { |
2200 | struct hci_command_hdr *hdr; | |
2201 | ||
2202 | if (!hdev->sent_cmd) | |
2203 | return NULL; | |
2204 | ||
2205 | hdr = (void *) hdev->sent_cmd->data; | |
2206 | ||
a9de9248 | 2207 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
2208 | return NULL; |
2209 | ||
a9de9248 | 2210 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
2211 | |
2212 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
2213 | } | |
2214 | ||
2215 | /* Send ACL data */ | |
2216 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
2217 | { | |
2218 | struct hci_acl_hdr *hdr; | |
2219 | int len = skb->len; | |
2220 | ||
badff6d0 ACM |
2221 | skb_push(skb, HCI_ACL_HDR_SIZE); |
2222 | skb_reset_transport_header(skb); | |
9c70220b | 2223 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
2224 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
2225 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
2226 | } |
2227 | ||
73d80deb LAD |
2228 | static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue, |
2229 | struct sk_buff *skb, __u16 flags) | |
1da177e4 LT |
2230 | { |
2231 | struct hci_dev *hdev = conn->hdev; | |
2232 | struct sk_buff *list; | |
2233 | ||
70f23020 AE |
2234 | list = skb_shinfo(skb)->frag_list; |
2235 | if (!list) { | |
1da177e4 LT |
2236 | /* Non fragmented */ |
2237 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
2238 | ||
73d80deb | 2239 | skb_queue_tail(queue, skb); |
1da177e4 LT |
2240 | } else { |
2241 | /* Fragmented */ | |
2242 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
2243 | ||
2244 | skb_shinfo(skb)->frag_list = NULL; | |
2245 | ||
2246 | /* Queue all fragments atomically */ | |
af3e6359 | 2247 | spin_lock(&queue->lock); |
1da177e4 | 2248 | |
73d80deb | 2249 | __skb_queue_tail(queue, skb); |
e702112f AE |
2250 | |
2251 | flags &= ~ACL_START; | |
2252 | flags |= ACL_CONT; | |
1da177e4 LT |
2253 | do { |
2254 | skb = list; list = list->next; | |
8e87d142 | 2255 | |
1da177e4 | 2256 | skb->dev = (void *) hdev; |
0d48d939 | 2257 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 2258 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 LT |
2259 | |
2260 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
2261 | ||
73d80deb | 2262 | __skb_queue_tail(queue, skb); |
1da177e4 LT |
2263 | } while (list); |
2264 | ||
af3e6359 | 2265 | spin_unlock(&queue->lock); |
1da177e4 | 2266 | } |
73d80deb LAD |
2267 | } |
2268 | ||
2269 | void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags) | |
2270 | { | |
2271 | struct hci_conn *conn = chan->conn; | |
2272 | struct hci_dev *hdev = conn->hdev; | |
2273 | ||
2274 | BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags); | |
2275 | ||
2276 | skb->dev = (void *) hdev; | |
2277 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; | |
2278 | hci_add_acl_hdr(skb, conn->handle, flags); | |
2279 | ||
2280 | hci_queue_acl(conn, &chan->data_q, skb, flags); | |
1da177e4 | 2281 | |
3eff45ea | 2282 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 LT |
2283 | } |
2284 | EXPORT_SYMBOL(hci_send_acl); | |
2285 | ||
2286 | /* Send SCO data */ | |
0d861d8b | 2287 | void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
2288 | { |
2289 | struct hci_dev *hdev = conn->hdev; | |
2290 | struct hci_sco_hdr hdr; | |
2291 | ||
2292 | BT_DBG("%s len %d", hdev->name, skb->len); | |
2293 | ||
aca3192c | 2294 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
2295 | hdr.dlen = skb->len; |
2296 | ||
badff6d0 ACM |
2297 | skb_push(skb, HCI_SCO_HDR_SIZE); |
2298 | skb_reset_transport_header(skb); | |
9c70220b | 2299 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
2300 | |
2301 | skb->dev = (void *) hdev; | |
0d48d939 | 2302 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
c78ae283 | 2303 | |
1da177e4 | 2304 | skb_queue_tail(&conn->data_q, skb); |
3eff45ea | 2305 | queue_work(hdev->workqueue, &hdev->tx_work); |
1da177e4 LT |
2306 | } |
2307 | EXPORT_SYMBOL(hci_send_sco); | |
2308 | ||
2309 | /* ---- HCI TX task (outgoing data) ---- */ | |
2310 | ||
2311 | /* HCI Connection scheduler */ | |
2312 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
2313 | { | |
2314 | struct hci_conn_hash *h = &hdev->conn_hash; | |
8035ded4 | 2315 | struct hci_conn *conn = NULL, *c; |
1da177e4 | 2316 | int num = 0, min = ~0; |
1da177e4 | 2317 | |
8e87d142 | 2318 | /* We don't have to lock device here. Connections are always |
1da177e4 | 2319 | * added and removed with TX task disabled. */ |
bf4c6325 GP |
2320 | |
2321 | rcu_read_lock(); | |
2322 | ||
2323 | list_for_each_entry_rcu(c, &h->list, list) { | |
769be974 | 2324 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 2325 | continue; |
769be974 MH |
2326 | |
2327 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
2328 | continue; | |
2329 | ||
1da177e4 LT |
2330 | num++; |
2331 | ||
2332 | if (c->sent < min) { | |
2333 | min = c->sent; | |
2334 | conn = c; | |
2335 | } | |
52087a79 LAD |
2336 | |
2337 | if (hci_conn_num(hdev, type) == num) | |
2338 | break; | |
1da177e4 LT |
2339 | } |
2340 | ||
bf4c6325 GP |
2341 | rcu_read_unlock(); |
2342 | ||
1da177e4 | 2343 | if (conn) { |
6ed58ec5 VT |
2344 | int cnt, q; |
2345 | ||
2346 | switch (conn->type) { | |
2347 | case ACL_LINK: | |
2348 | cnt = hdev->acl_cnt; | |
2349 | break; | |
2350 | case SCO_LINK: | |
2351 | case ESCO_LINK: | |
2352 | cnt = hdev->sco_cnt; | |
2353 | break; | |
2354 | case LE_LINK: | |
2355 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; | |
2356 | break; | |
2357 | default: | |
2358 | cnt = 0; | |
2359 | BT_ERR("Unknown link type"); | |
2360 | } | |
2361 | ||
2362 | q = cnt / num; | |
1da177e4 LT |
2363 | *quote = q ? q : 1; |
2364 | } else | |
2365 | *quote = 0; | |
2366 | ||
2367 | BT_DBG("conn %p quote %d", conn, *quote); | |
2368 | return conn; | |
2369 | } | |
2370 | ||
bae1f5d9 | 2371 | static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type) |
1da177e4 LT |
2372 | { |
2373 | struct hci_conn_hash *h = &hdev->conn_hash; | |
8035ded4 | 2374 | struct hci_conn *c; |
1da177e4 | 2375 | |
bae1f5d9 | 2376 | BT_ERR("%s link tx timeout", hdev->name); |
1da177e4 | 2377 | |
bf4c6325 GP |
2378 | rcu_read_lock(); |
2379 | ||
1da177e4 | 2380 | /* Kill stalled connections */ |
bf4c6325 | 2381 | list_for_each_entry_rcu(c, &h->list, list) { |
bae1f5d9 VT |
2382 | if (c->type == type && c->sent) { |
2383 | BT_ERR("%s killing stalled connection %s", | |
1da177e4 LT |
2384 | hdev->name, batostr(&c->dst)); |
2385 | hci_acl_disconn(c, 0x13); | |
2386 | } | |
2387 | } | |
bf4c6325 GP |
2388 | |
2389 | rcu_read_unlock(); | |
1da177e4 LT |
2390 | } |
2391 | ||
73d80deb LAD |
2392 | static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type, |
2393 | int *quote) | |
1da177e4 | 2394 | { |
73d80deb LAD |
2395 | struct hci_conn_hash *h = &hdev->conn_hash; |
2396 | struct hci_chan *chan = NULL; | |
2397 | int num = 0, min = ~0, cur_prio = 0; | |
1da177e4 | 2398 | struct hci_conn *conn; |
73d80deb LAD |
2399 | int cnt, q, conn_num = 0; |
2400 | ||
2401 | BT_DBG("%s", hdev->name); | |
2402 | ||
bf4c6325 GP |
2403 | rcu_read_lock(); |
2404 | ||
2405 | list_for_each_entry_rcu(conn, &h->list, list) { | |
73d80deb LAD |
2406 | struct hci_chan *tmp; |
2407 | ||
2408 | if (conn->type != type) | |
2409 | continue; | |
2410 | ||
2411 | if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) | |
2412 | continue; | |
2413 | ||
2414 | conn_num++; | |
2415 | ||
8192edef | 2416 | list_for_each_entry_rcu(tmp, &conn->chan_list, list) { |
73d80deb LAD |
2417 | struct sk_buff *skb; |
2418 | ||
2419 | if (skb_queue_empty(&tmp->data_q)) | |
2420 | continue; | |
2421 | ||
2422 | skb = skb_peek(&tmp->data_q); | |
2423 | if (skb->priority < cur_prio) | |
2424 | continue; | |
2425 | ||
2426 | if (skb->priority > cur_prio) { | |
2427 | num = 0; | |
2428 | min = ~0; | |
2429 | cur_prio = skb->priority; | |
2430 | } | |
2431 | ||
2432 | num++; | |
2433 | ||
2434 | if (conn->sent < min) { | |
2435 | min = conn->sent; | |
2436 | chan = tmp; | |
2437 | } | |
2438 | } | |
2439 | ||
2440 | if (hci_conn_num(hdev, type) == conn_num) | |
2441 | break; | |
2442 | } | |
2443 | ||
bf4c6325 GP |
2444 | rcu_read_unlock(); |
2445 | ||
73d80deb LAD |
2446 | if (!chan) |
2447 | return NULL; | |
2448 | ||
2449 | switch (chan->conn->type) { | |
2450 | case ACL_LINK: | |
2451 | cnt = hdev->acl_cnt; | |
2452 | break; | |
2453 | case SCO_LINK: | |
2454 | case ESCO_LINK: | |
2455 | cnt = hdev->sco_cnt; | |
2456 | break; | |
2457 | case LE_LINK: | |
2458 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; | |
2459 | break; | |
2460 | default: | |
2461 | cnt = 0; | |
2462 | BT_ERR("Unknown link type"); | |
2463 | } | |
2464 | ||
2465 | q = cnt / num; | |
2466 | *quote = q ? q : 1; | |
2467 | BT_DBG("chan %p quote %d", chan, *quote); | |
2468 | return chan; | |
2469 | } | |
2470 | ||
02b20f0b LAD |
2471 | static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type) |
2472 | { | |
2473 | struct hci_conn_hash *h = &hdev->conn_hash; | |
2474 | struct hci_conn *conn; | |
2475 | int num = 0; | |
2476 | ||
2477 | BT_DBG("%s", hdev->name); | |
2478 | ||
bf4c6325 GP |
2479 | rcu_read_lock(); |
2480 | ||
2481 | list_for_each_entry_rcu(conn, &h->list, list) { | |
02b20f0b LAD |
2482 | struct hci_chan *chan; |
2483 | ||
2484 | if (conn->type != type) | |
2485 | continue; | |
2486 | ||
2487 | if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) | |
2488 | continue; | |
2489 | ||
2490 | num++; | |
2491 | ||
8192edef | 2492 | list_for_each_entry_rcu(chan, &conn->chan_list, list) { |
02b20f0b LAD |
2493 | struct sk_buff *skb; |
2494 | ||
2495 | if (chan->sent) { | |
2496 | chan->sent = 0; | |
2497 | continue; | |
2498 | } | |
2499 | ||
2500 | if (skb_queue_empty(&chan->data_q)) | |
2501 | continue; | |
2502 | ||
2503 | skb = skb_peek(&chan->data_q); | |
2504 | if (skb->priority >= HCI_PRIO_MAX - 1) | |
2505 | continue; | |
2506 | ||
2507 | skb->priority = HCI_PRIO_MAX - 1; | |
2508 | ||
2509 | BT_DBG("chan %p skb %p promoted to %d", chan, skb, | |
2510 | skb->priority); | |
2511 | } | |
2512 | ||
2513 | if (hci_conn_num(hdev, type) == num) | |
2514 | break; | |
2515 | } | |
bf4c6325 GP |
2516 | |
2517 | rcu_read_unlock(); | |
2518 | ||
02b20f0b LAD |
2519 | } |
2520 | ||
b71d385a AE |
2521 | static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb) |
2522 | { | |
2523 | /* Calculate count of blocks used by this packet */ | |
2524 | return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len); | |
2525 | } | |
2526 | ||
63d2bc1b | 2527 | static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt) |
73d80deb | 2528 | { |
1da177e4 LT |
2529 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
2530 | /* ACL tx timeout must be longer than maximum | |
2531 | * link supervision timeout (40.9 seconds) */ | |
63d2bc1b | 2532 | if (!cnt && time_after(jiffies, hdev->acl_last_tx + |
cc48dc0a | 2533 | msecs_to_jiffies(HCI_ACL_TX_TIMEOUT))) |
bae1f5d9 | 2534 | hci_link_tx_to(hdev, ACL_LINK); |
1da177e4 | 2535 | } |
63d2bc1b | 2536 | } |
1da177e4 | 2537 | |
63d2bc1b AE |
2538 | static inline void hci_sched_acl_pkt(struct hci_dev *hdev) |
2539 | { | |
2540 | unsigned int cnt = hdev->acl_cnt; | |
2541 | struct hci_chan *chan; | |
2542 | struct sk_buff *skb; | |
2543 | int quote; | |
2544 | ||
2545 | __check_timeout(hdev, cnt); | |
04837f64 | 2546 | |
73d80deb LAD |
2547 | while (hdev->acl_cnt && |
2548 | (chan = hci_chan_sent(hdev, ACL_LINK, "e))) { | |
ec1cce24 LAD |
2549 | u32 priority = (skb_peek(&chan->data_q))->priority; |
2550 | while (quote-- && (skb = skb_peek(&chan->data_q))) { | |
73d80deb LAD |
2551 | BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
2552 | skb->len, skb->priority); | |
2553 | ||
ec1cce24 LAD |
2554 | /* Stop if priority has changed */ |
2555 | if (skb->priority < priority) | |
2556 | break; | |
2557 | ||
2558 | skb = skb_dequeue(&chan->data_q); | |
2559 | ||
73d80deb | 2560 | hci_conn_enter_active_mode(chan->conn, |
04124681 | 2561 | bt_cb(skb)->force_active); |
04837f64 | 2562 | |
1da177e4 LT |
2563 | hci_send_frame(skb); |
2564 | hdev->acl_last_tx = jiffies; | |
2565 | ||
2566 | hdev->acl_cnt--; | |
73d80deb LAD |
2567 | chan->sent++; |
2568 | chan->conn->sent++; | |
1da177e4 LT |
2569 | } |
2570 | } | |
02b20f0b LAD |
2571 | |
2572 | if (cnt != hdev->acl_cnt) | |
2573 | hci_prio_recalculate(hdev, ACL_LINK); | |
1da177e4 LT |
2574 | } |
2575 | ||
b71d385a AE |
2576 | static inline void hci_sched_acl_blk(struct hci_dev *hdev) |
2577 | { | |
63d2bc1b | 2578 | unsigned int cnt = hdev->block_cnt; |
b71d385a AE |
2579 | struct hci_chan *chan; |
2580 | struct sk_buff *skb; | |
2581 | int quote; | |
b71d385a | 2582 | |
63d2bc1b | 2583 | __check_timeout(hdev, cnt); |
b71d385a AE |
2584 | |
2585 | while (hdev->block_cnt > 0 && | |
2586 | (chan = hci_chan_sent(hdev, ACL_LINK, "e))) { | |
2587 | u32 priority = (skb_peek(&chan->data_q))->priority; | |
2588 | while (quote > 0 && (skb = skb_peek(&chan->data_q))) { | |
2589 | int blocks; | |
2590 | ||
2591 | BT_DBG("chan %p skb %p len %d priority %u", chan, skb, | |
2592 | skb->len, skb->priority); | |
2593 | ||
2594 | /* Stop if priority has changed */ | |
2595 | if (skb->priority < priority) | |
2596 | break; | |
2597 | ||
2598 | skb = skb_dequeue(&chan->data_q); | |
2599 | ||
2600 | blocks = __get_blocks(hdev, skb); | |
2601 | if (blocks > hdev->block_cnt) | |
2602 | return; | |
2603 | ||
2604 | hci_conn_enter_active_mode(chan->conn, | |
2605 | bt_cb(skb)->force_active); | |
2606 | ||
2607 | hci_send_frame(skb); | |
2608 | hdev->acl_last_tx = jiffies; | |
2609 | ||
2610 | hdev->block_cnt -= blocks; | |
2611 | quote -= blocks; | |
2612 | ||
2613 | chan->sent += blocks; | |
2614 | chan->conn->sent += blocks; | |
2615 | } | |
2616 | } | |
2617 | ||
2618 | if (cnt != hdev->block_cnt) | |
2619 | hci_prio_recalculate(hdev, ACL_LINK); | |
2620 | } | |
2621 | ||
2622 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
2623 | { | |
2624 | BT_DBG("%s", hdev->name); | |
2625 | ||
2626 | if (!hci_conn_num(hdev, ACL_LINK)) | |
2627 | return; | |
2628 | ||
2629 | switch (hdev->flow_ctl_mode) { | |
2630 | case HCI_FLOW_CTL_MODE_PACKET_BASED: | |
2631 | hci_sched_acl_pkt(hdev); | |
2632 | break; | |
2633 | ||
2634 | case HCI_FLOW_CTL_MODE_BLOCK_BASED: | |
2635 | hci_sched_acl_blk(hdev); | |
2636 | break; | |
2637 | } | |
2638 | } | |
2639 | ||
1da177e4 LT |
2640 | /* Schedule SCO */ |
2641 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
2642 | { | |
2643 | struct hci_conn *conn; | |
2644 | struct sk_buff *skb; | |
2645 | int quote; | |
2646 | ||
2647 | BT_DBG("%s", hdev->name); | |
2648 | ||
52087a79 LAD |
2649 | if (!hci_conn_num(hdev, SCO_LINK)) |
2650 | return; | |
2651 | ||
1da177e4 LT |
2652 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { |
2653 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
2654 | BT_DBG("skb %p len %d", skb, skb->len); | |
2655 | hci_send_frame(skb); | |
2656 | ||
2657 | conn->sent++; | |
2658 | if (conn->sent == ~0) | |
2659 | conn->sent = 0; | |
2660 | } | |
2661 | } | |
2662 | } | |
2663 | ||
b6a0dc82 MH |
2664 | static inline void hci_sched_esco(struct hci_dev *hdev) |
2665 | { | |
2666 | struct hci_conn *conn; | |
2667 | struct sk_buff *skb; | |
2668 | int quote; | |
2669 | ||
2670 | BT_DBG("%s", hdev->name); | |
2671 | ||
52087a79 LAD |
2672 | if (!hci_conn_num(hdev, ESCO_LINK)) |
2673 | return; | |
2674 | ||
b6a0dc82 MH |
2675 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { |
2676 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
2677 | BT_DBG("skb %p len %d", skb, skb->len); | |
2678 | hci_send_frame(skb); | |
2679 | ||
2680 | conn->sent++; | |
2681 | if (conn->sent == ~0) | |
2682 | conn->sent = 0; | |
2683 | } | |
2684 | } | |
2685 | } | |
2686 | ||
6ed58ec5 VT |
2687 | static inline void hci_sched_le(struct hci_dev *hdev) |
2688 | { | |
73d80deb | 2689 | struct hci_chan *chan; |
6ed58ec5 | 2690 | struct sk_buff *skb; |
02b20f0b | 2691 | int quote, cnt, tmp; |
6ed58ec5 VT |
2692 | |
2693 | BT_DBG("%s", hdev->name); | |
2694 | ||
52087a79 LAD |
2695 | if (!hci_conn_num(hdev, LE_LINK)) |
2696 | return; | |
2697 | ||
6ed58ec5 VT |
2698 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
2699 | /* LE tx timeout must be longer than maximum | |
2700 | * link supervision timeout (40.9 seconds) */ | |
bae1f5d9 | 2701 | if (!hdev->le_cnt && hdev->le_pkts && |
6ed58ec5 | 2702 | time_after(jiffies, hdev->le_last_tx + HZ * 45)) |
bae1f5d9 | 2703 | hci_link_tx_to(hdev, LE_LINK); |
6ed58ec5 VT |
2704 | } |
2705 | ||
2706 | cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt; | |
02b20f0b | 2707 | tmp = cnt; |
73d80deb | 2708 | while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) { |
ec1cce24 LAD |
2709 | u32 priority = (skb_peek(&chan->data_q))->priority; |
2710 | while (quote-- && (skb = skb_peek(&chan->data_q))) { | |
73d80deb LAD |
2711 | BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
2712 | skb->len, skb->priority); | |
6ed58ec5 | 2713 | |
ec1cce24 LAD |
2714 | /* Stop if priority has changed */ |
2715 | if (skb->priority < priority) | |
2716 | break; | |
2717 | ||
2718 | skb = skb_dequeue(&chan->data_q); | |
2719 | ||
6ed58ec5 VT |
2720 | hci_send_frame(skb); |
2721 | hdev->le_last_tx = jiffies; | |
2722 | ||
2723 | cnt--; | |
73d80deb LAD |
2724 | chan->sent++; |
2725 | chan->conn->sent++; | |
6ed58ec5 VT |
2726 | } |
2727 | } | |
73d80deb | 2728 | |
6ed58ec5 VT |
2729 | if (hdev->le_pkts) |
2730 | hdev->le_cnt = cnt; | |
2731 | else | |
2732 | hdev->acl_cnt = cnt; | |
02b20f0b LAD |
2733 | |
2734 | if (cnt != tmp) | |
2735 | hci_prio_recalculate(hdev, LE_LINK); | |
6ed58ec5 VT |
2736 | } |
2737 | ||
3eff45ea | 2738 | static void hci_tx_work(struct work_struct *work) |
1da177e4 | 2739 | { |
3eff45ea | 2740 | struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work); |
1da177e4 LT |
2741 | struct sk_buff *skb; |
2742 | ||
6ed58ec5 VT |
2743 | BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt, |
2744 | hdev->sco_cnt, hdev->le_cnt); | |
1da177e4 LT |
2745 | |
2746 | /* Schedule queues and send stuff to HCI driver */ | |
2747 | ||
2748 | hci_sched_acl(hdev); | |
2749 | ||
2750 | hci_sched_sco(hdev); | |
2751 | ||
b6a0dc82 MH |
2752 | hci_sched_esco(hdev); |
2753 | ||
6ed58ec5 VT |
2754 | hci_sched_le(hdev); |
2755 | ||
1da177e4 LT |
2756 | /* Send next queued raw (unknown type) packet */ |
2757 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
2758 | hci_send_frame(skb); | |
1da177e4 LT |
2759 | } |
2760 | ||
25985edc | 2761 | /* ----- HCI RX task (incoming data processing) ----- */ |
1da177e4 LT |
2762 | |
2763 | /* ACL data packet */ | |
2764 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
2765 | { | |
2766 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
2767 | struct hci_conn *conn; | |
2768 | __u16 handle, flags; | |
2769 | ||
2770 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
2771 | ||
2772 | handle = __le16_to_cpu(hdr->handle); | |
2773 | flags = hci_flags(handle); | |
2774 | handle = hci_handle(handle); | |
2775 | ||
2776 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
2777 | ||
2778 | hdev->stat.acl_rx++; | |
2779 | ||
2780 | hci_dev_lock(hdev); | |
2781 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
2782 | hci_dev_unlock(hdev); | |
8e87d142 | 2783 | |
1da177e4 | 2784 | if (conn) { |
65983fc7 | 2785 | hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF); |
04837f64 | 2786 | |
1da177e4 | 2787 | /* Send to upper protocol */ |
686ebf28 UF |
2788 | l2cap_recv_acldata(conn, skb, flags); |
2789 | return; | |
1da177e4 | 2790 | } else { |
8e87d142 | 2791 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
2792 | hdev->name, handle); |
2793 | } | |
2794 | ||
2795 | kfree_skb(skb); | |
2796 | } | |
2797 | ||
2798 | /* SCO data packet */ | |
2799 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
2800 | { | |
2801 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
2802 | struct hci_conn *conn; | |
2803 | __u16 handle; | |
2804 | ||
2805 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
2806 | ||
2807 | handle = __le16_to_cpu(hdr->handle); | |
2808 | ||
2809 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
2810 | ||
2811 | hdev->stat.sco_rx++; | |
2812 | ||
2813 | hci_dev_lock(hdev); | |
2814 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
2815 | hci_dev_unlock(hdev); | |
2816 | ||
2817 | if (conn) { | |
1da177e4 | 2818 | /* Send to upper protocol */ |
686ebf28 UF |
2819 | sco_recv_scodata(conn, skb); |
2820 | return; | |
1da177e4 | 2821 | } else { |
8e87d142 | 2822 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
2823 | hdev->name, handle); |
2824 | } | |
2825 | ||
2826 | kfree_skb(skb); | |
2827 | } | |
2828 | ||
b78752cc | 2829 | static void hci_rx_work(struct work_struct *work) |
1da177e4 | 2830 | { |
b78752cc | 2831 | struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work); |
1da177e4 LT |
2832 | struct sk_buff *skb; |
2833 | ||
2834 | BT_DBG("%s", hdev->name); | |
2835 | ||
1da177e4 | 2836 | while ((skb = skb_dequeue(&hdev->rx_q))) { |
cd82e61c MH |
2837 | /* Send copy to monitor */ |
2838 | hci_send_to_monitor(hdev, skb); | |
2839 | ||
1da177e4 LT |
2840 | if (atomic_read(&hdev->promisc)) { |
2841 | /* Send copy to the sockets */ | |
470fe1b5 | 2842 | hci_send_to_sock(hdev, skb); |
1da177e4 LT |
2843 | } |
2844 | ||
2845 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
2846 | kfree_skb(skb); | |
2847 | continue; | |
2848 | } | |
2849 | ||
2850 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
2851 | /* Don't process data packets in this states. */ | |
0d48d939 | 2852 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
2853 | case HCI_ACLDATA_PKT: |
2854 | case HCI_SCODATA_PKT: | |
2855 | kfree_skb(skb); | |
2856 | continue; | |
3ff50b79 | 2857 | } |
1da177e4 LT |
2858 | } |
2859 | ||
2860 | /* Process frame */ | |
0d48d939 | 2861 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 | 2862 | case HCI_EVENT_PKT: |
b78752cc | 2863 | BT_DBG("%s Event packet", hdev->name); |
1da177e4 LT |
2864 | hci_event_packet(hdev, skb); |
2865 | break; | |
2866 | ||
2867 | case HCI_ACLDATA_PKT: | |
2868 | BT_DBG("%s ACL data packet", hdev->name); | |
2869 | hci_acldata_packet(hdev, skb); | |
2870 | break; | |
2871 | ||
2872 | case HCI_SCODATA_PKT: | |
2873 | BT_DBG("%s SCO data packet", hdev->name); | |
2874 | hci_scodata_packet(hdev, skb); | |
2875 | break; | |
2876 | ||
2877 | default: | |
2878 | kfree_skb(skb); | |
2879 | break; | |
2880 | } | |
2881 | } | |
1da177e4 LT |
2882 | } |
2883 | ||
c347b765 | 2884 | static void hci_cmd_work(struct work_struct *work) |
1da177e4 | 2885 | { |
c347b765 | 2886 | struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work); |
1da177e4 LT |
2887 | struct sk_buff *skb; |
2888 | ||
2889 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
2890 | ||
1da177e4 | 2891 | /* Send queued commands */ |
5a08ecce AE |
2892 | if (atomic_read(&hdev->cmd_cnt)) { |
2893 | skb = skb_dequeue(&hdev->cmd_q); | |
2894 | if (!skb) | |
2895 | return; | |
2896 | ||
7585b97a | 2897 | kfree_skb(hdev->sent_cmd); |
1da177e4 | 2898 | |
70f23020 AE |
2899 | hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC); |
2900 | if (hdev->sent_cmd) { | |
1da177e4 LT |
2901 | atomic_dec(&hdev->cmd_cnt); |
2902 | hci_send_frame(skb); | |
7bdb8a5c SJ |
2903 | if (test_bit(HCI_RESET, &hdev->flags)) |
2904 | del_timer(&hdev->cmd_timer); | |
2905 | else | |
2906 | mod_timer(&hdev->cmd_timer, | |
6bd32326 | 2907 | jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT)); |
1da177e4 LT |
2908 | } else { |
2909 | skb_queue_head(&hdev->cmd_q, skb); | |
c347b765 | 2910 | queue_work(hdev->workqueue, &hdev->cmd_work); |
1da177e4 LT |
2911 | } |
2912 | } | |
2913 | } | |
2519a1fc AG |
2914 | |
2915 | int hci_do_inquiry(struct hci_dev *hdev, u8 length) | |
2916 | { | |
2917 | /* General inquiry access code (GIAC) */ | |
2918 | u8 lap[3] = { 0x33, 0x8b, 0x9e }; | |
2919 | struct hci_cp_inquiry cp; | |
2920 | ||
2921 | BT_DBG("%s", hdev->name); | |
2922 | ||
2923 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
2924 | return -EINPROGRESS; | |
2925 | ||
4663262c JH |
2926 | inquiry_cache_flush(hdev); |
2927 | ||
2519a1fc AG |
2928 | memset(&cp, 0, sizeof(cp)); |
2929 | memcpy(&cp.lap, lap, sizeof(cp.lap)); | |
2930 | cp.length = length; | |
2931 | ||
2932 | return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); | |
2933 | } | |
023d5049 AG |
2934 | |
2935 | int hci_cancel_inquiry(struct hci_dev *hdev) | |
2936 | { | |
2937 | BT_DBG("%s", hdev->name); | |
2938 | ||
2939 | if (!test_bit(HCI_INQUIRY, &hdev->flags)) | |
2940 | return -EPERM; | |
2941 | ||
2942 | return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL); | |
2943 | } |