Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth HCI core. */ | |
26 | ||
82453021 | 27 | #include <linux/jiffies.h> |
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/kmod.h> | |
30 | ||
31 | #include <linux/types.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/kernel.h> | |
1da177e4 LT |
34 | #include <linux/sched.h> |
35 | #include <linux/slab.h> | |
36 | #include <linux/poll.h> | |
37 | #include <linux/fcntl.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/skbuff.h> | |
f48fd9c8 | 40 | #include <linux/workqueue.h> |
1da177e4 LT |
41 | #include <linux/interrupt.h> |
42 | #include <linux/notifier.h> | |
611b30f7 | 43 | #include <linux/rfkill.h> |
6bd32326 | 44 | #include <linux/timer.h> |
1da177e4 LT |
45 | #include <net/sock.h> |
46 | ||
47 | #include <asm/system.h> | |
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 | ||
1da177e4 LT |
56 | static void hci_cmd_task(unsigned long arg); |
57 | static void hci_rx_task(unsigned long arg); | |
58 | static void hci_tx_task(unsigned long arg); | |
1da177e4 LT |
59 | |
60 | static DEFINE_RWLOCK(hci_task_lock); | |
61 | ||
62 | /* HCI device list */ | |
63 | LIST_HEAD(hci_dev_list); | |
64 | DEFINE_RWLOCK(hci_dev_list_lock); | |
65 | ||
66 | /* HCI callback list */ | |
67 | LIST_HEAD(hci_cb_list); | |
68 | DEFINE_RWLOCK(hci_cb_list_lock); | |
69 | ||
70 | /* HCI protocols */ | |
71 | #define HCI_MAX_PROTO 2 | |
72 | struct hci_proto *hci_proto[HCI_MAX_PROTO]; | |
73 | ||
74 | /* HCI notifiers list */ | |
e041c683 | 75 | static ATOMIC_NOTIFIER_HEAD(hci_notifier); |
1da177e4 LT |
76 | |
77 | /* ---- HCI notifications ---- */ | |
78 | ||
79 | int hci_register_notifier(struct notifier_block *nb) | |
80 | { | |
e041c683 | 81 | return atomic_notifier_chain_register(&hci_notifier, nb); |
1da177e4 LT |
82 | } |
83 | ||
84 | int hci_unregister_notifier(struct notifier_block *nb) | |
85 | { | |
e041c683 | 86 | return atomic_notifier_chain_unregister(&hci_notifier, nb); |
1da177e4 LT |
87 | } |
88 | ||
6516455d | 89 | static void hci_notify(struct hci_dev *hdev, int event) |
1da177e4 | 90 | { |
e041c683 | 91 | atomic_notifier_call_chain(&hci_notifier, event, hdev); |
1da177e4 LT |
92 | } |
93 | ||
94 | /* ---- HCI requests ---- */ | |
95 | ||
23bb5763 | 96 | void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result) |
1da177e4 | 97 | { |
23bb5763 JH |
98 | BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result); |
99 | ||
a5040efa JH |
100 | /* If this is the init phase check if the completed command matches |
101 | * the last init command, and if not just return. | |
102 | */ | |
103 | if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) | |
23bb5763 | 104 | return; |
1da177e4 LT |
105 | |
106 | if (hdev->req_status == HCI_REQ_PEND) { | |
107 | hdev->req_result = result; | |
108 | hdev->req_status = HCI_REQ_DONE; | |
109 | wake_up_interruptible(&hdev->req_wait_q); | |
110 | } | |
111 | } | |
112 | ||
113 | static void hci_req_cancel(struct hci_dev *hdev, int err) | |
114 | { | |
115 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
116 | ||
117 | if (hdev->req_status == HCI_REQ_PEND) { | |
118 | hdev->req_result = err; | |
119 | hdev->req_status = HCI_REQ_CANCELED; | |
120 | wake_up_interruptible(&hdev->req_wait_q); | |
121 | } | |
122 | } | |
123 | ||
124 | /* Execute request and wait for completion. */ | |
8e87d142 | 125 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
01df8c31 | 126 | unsigned long opt, __u32 timeout) |
1da177e4 LT |
127 | { |
128 | DECLARE_WAITQUEUE(wait, current); | |
129 | int err = 0; | |
130 | ||
131 | BT_DBG("%s start", hdev->name); | |
132 | ||
133 | hdev->req_status = HCI_REQ_PEND; | |
134 | ||
135 | add_wait_queue(&hdev->req_wait_q, &wait); | |
136 | set_current_state(TASK_INTERRUPTIBLE); | |
137 | ||
138 | req(hdev, opt); | |
139 | schedule_timeout(timeout); | |
140 | ||
141 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
142 | ||
143 | if (signal_pending(current)) | |
144 | return -EINTR; | |
145 | ||
146 | switch (hdev->req_status) { | |
147 | case HCI_REQ_DONE: | |
148 | err = -bt_err(hdev->req_result); | |
149 | break; | |
150 | ||
151 | case HCI_REQ_CANCELED: | |
152 | err = -hdev->req_result; | |
153 | break; | |
154 | ||
155 | default: | |
156 | err = -ETIMEDOUT; | |
157 | break; | |
3ff50b79 | 158 | } |
1da177e4 | 159 | |
a5040efa | 160 | hdev->req_status = hdev->req_result = 0; |
1da177e4 LT |
161 | |
162 | BT_DBG("%s end: err %d", hdev->name, err); | |
163 | ||
164 | return err; | |
165 | } | |
166 | ||
167 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), | |
01df8c31 | 168 | unsigned long opt, __u32 timeout) |
1da177e4 LT |
169 | { |
170 | int ret; | |
171 | ||
7c6a329e MH |
172 | if (!test_bit(HCI_UP, &hdev->flags)) |
173 | return -ENETDOWN; | |
174 | ||
1da177e4 LT |
175 | /* Serialize all requests */ |
176 | hci_req_lock(hdev); | |
177 | ret = __hci_request(hdev, req, opt, timeout); | |
178 | hci_req_unlock(hdev); | |
179 | ||
180 | return ret; | |
181 | } | |
182 | ||
183 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) | |
184 | { | |
185 | BT_DBG("%s %ld", hdev->name, opt); | |
186 | ||
187 | /* Reset device */ | |
10572132 | 188 | set_bit(HCI_RESET, &hdev->flags); |
a9de9248 | 189 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
190 | } |
191 | ||
192 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) | |
193 | { | |
b0916ea0 | 194 | struct hci_cp_delete_stored_link_key cp; |
1da177e4 | 195 | struct sk_buff *skb; |
1ebb9252 | 196 | __le16 param; |
89f2783d | 197 | __u8 flt_type; |
1da177e4 LT |
198 | |
199 | BT_DBG("%s %ld", hdev->name, opt); | |
200 | ||
201 | /* Driver initialization */ | |
202 | ||
203 | /* Special commands */ | |
204 | while ((skb = skb_dequeue(&hdev->driver_init))) { | |
0d48d939 | 205 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 206 | skb->dev = (void *) hdev; |
c78ae283 | 207 | |
1da177e4 | 208 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 209 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
210 | } |
211 | skb_queue_purge(&hdev->driver_init); | |
212 | ||
213 | /* Mandatory initialization */ | |
214 | ||
215 | /* Reset */ | |
10572132 GP |
216 | if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) { |
217 | set_bit(HCI_RESET, &hdev->flags); | |
a9de9248 | 218 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
10572132 | 219 | } |
1da177e4 LT |
220 | |
221 | /* Read Local Supported Features */ | |
a9de9248 | 222 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
1da177e4 | 223 | |
1143e5a6 | 224 | /* Read Local Version */ |
a9de9248 | 225 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
1143e5a6 | 226 | |
1da177e4 | 227 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
a9de9248 | 228 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
1da177e4 LT |
229 | |
230 | #if 0 | |
231 | /* Host buffer size */ | |
232 | { | |
233 | struct hci_cp_host_buffer_size cp; | |
aca3192c | 234 | cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE); |
1da177e4 | 235 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
aca3192c YH |
236 | cp.acl_max_pkt = cpu_to_le16(0xffff); |
237 | cp.sco_max_pkt = cpu_to_le16(0xffff); | |
a9de9248 | 238 | hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
1da177e4 LT |
239 | } |
240 | #endif | |
241 | ||
242 | /* Read BD Address */ | |
a9de9248 MH |
243 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
244 | ||
245 | /* Read Class of Device */ | |
246 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); | |
247 | ||
248 | /* Read Local Name */ | |
249 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); | |
1da177e4 LT |
250 | |
251 | /* Read Voice Setting */ | |
a9de9248 | 252 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
1da177e4 LT |
253 | |
254 | /* Optional initialization */ | |
255 | ||
256 | /* Clear Event Filters */ | |
89f2783d | 257 | flt_type = HCI_FLT_CLEAR_ALL; |
a9de9248 | 258 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
1da177e4 | 259 | |
1da177e4 | 260 | /* Connection accept timeout ~20 secs */ |
aca3192c | 261 | param = cpu_to_le16(0x7d00); |
a9de9248 | 262 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
b0916ea0 JH |
263 | |
264 | bacpy(&cp.bdaddr, BDADDR_ANY); | |
265 | cp.delete_all = 1; | |
266 | hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp); | |
1da177e4 LT |
267 | } |
268 | ||
6ed58ec5 VT |
269 | static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt) |
270 | { | |
271 | BT_DBG("%s", hdev->name); | |
272 | ||
273 | /* Read LE buffer size */ | |
274 | hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL); | |
275 | } | |
276 | ||
1da177e4 LT |
277 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) |
278 | { | |
279 | __u8 scan = opt; | |
280 | ||
281 | BT_DBG("%s %x", hdev->name, scan); | |
282 | ||
283 | /* Inquiry and Page scans */ | |
a9de9248 | 284 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1da177e4 LT |
285 | } |
286 | ||
287 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
288 | { | |
289 | __u8 auth = opt; | |
290 | ||
291 | BT_DBG("%s %x", hdev->name, auth); | |
292 | ||
293 | /* Authentication */ | |
a9de9248 | 294 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
1da177e4 LT |
295 | } |
296 | ||
297 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
298 | { | |
299 | __u8 encrypt = opt; | |
300 | ||
301 | BT_DBG("%s %x", hdev->name, encrypt); | |
302 | ||
e4e8e37c | 303 | /* Encryption */ |
a9de9248 | 304 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
1da177e4 LT |
305 | } |
306 | ||
e4e8e37c MH |
307 | static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
308 | { | |
309 | __le16 policy = cpu_to_le16(opt); | |
310 | ||
a418b893 | 311 | BT_DBG("%s %x", hdev->name, policy); |
e4e8e37c MH |
312 | |
313 | /* Default link policy */ | |
314 | hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); | |
315 | } | |
316 | ||
8e87d142 | 317 | /* Get HCI device by index. |
1da177e4 LT |
318 | * Device is held on return. */ |
319 | struct hci_dev *hci_dev_get(int index) | |
320 | { | |
321 | struct hci_dev *hdev = NULL; | |
322 | struct list_head *p; | |
323 | ||
324 | BT_DBG("%d", index); | |
325 | ||
326 | if (index < 0) | |
327 | return NULL; | |
328 | ||
329 | read_lock(&hci_dev_list_lock); | |
330 | list_for_each(p, &hci_dev_list) { | |
331 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
332 | if (d->id == index) { | |
333 | hdev = hci_dev_hold(d); | |
334 | break; | |
335 | } | |
336 | } | |
337 | read_unlock(&hci_dev_list_lock); | |
338 | return hdev; | |
339 | } | |
1da177e4 LT |
340 | |
341 | /* ---- Inquiry support ---- */ | |
342 | static void inquiry_cache_flush(struct hci_dev *hdev) | |
343 | { | |
344 | struct inquiry_cache *cache = &hdev->inq_cache; | |
345 | struct inquiry_entry *next = cache->list, *e; | |
346 | ||
347 | BT_DBG("cache %p", cache); | |
348 | ||
349 | cache->list = NULL; | |
350 | while ((e = next)) { | |
351 | next = e->next; | |
352 | kfree(e); | |
353 | } | |
354 | } | |
355 | ||
356 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
357 | { | |
358 | struct inquiry_cache *cache = &hdev->inq_cache; | |
359 | struct inquiry_entry *e; | |
360 | ||
361 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
362 | ||
363 | for (e = cache->list; e; e = e->next) | |
364 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
365 | break; | |
366 | return e; | |
367 | } | |
368 | ||
369 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) | |
370 | { | |
371 | struct inquiry_cache *cache = &hdev->inq_cache; | |
70f23020 | 372 | struct inquiry_entry *ie; |
1da177e4 LT |
373 | |
374 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
375 | ||
70f23020 AE |
376 | ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr); |
377 | if (!ie) { | |
1da177e4 | 378 | /* Entry not in the cache. Add new one. */ |
70f23020 AE |
379 | ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC); |
380 | if (!ie) | |
1da177e4 | 381 | return; |
70f23020 AE |
382 | |
383 | ie->next = cache->list; | |
384 | cache->list = ie; | |
1da177e4 LT |
385 | } |
386 | ||
70f23020 AE |
387 | memcpy(&ie->data, data, sizeof(*data)); |
388 | ie->timestamp = jiffies; | |
1da177e4 LT |
389 | cache->timestamp = jiffies; |
390 | } | |
391 | ||
392 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
393 | { | |
394 | struct inquiry_cache *cache = &hdev->inq_cache; | |
395 | struct inquiry_info *info = (struct inquiry_info *) buf; | |
396 | struct inquiry_entry *e; | |
397 | int copied = 0; | |
398 | ||
399 | for (e = cache->list; e && copied < num; e = e->next, copied++) { | |
400 | struct inquiry_data *data = &e->data; | |
401 | bacpy(&info->bdaddr, &data->bdaddr); | |
402 | info->pscan_rep_mode = data->pscan_rep_mode; | |
403 | info->pscan_period_mode = data->pscan_period_mode; | |
404 | info->pscan_mode = data->pscan_mode; | |
405 | memcpy(info->dev_class, data->dev_class, 3); | |
406 | info->clock_offset = data->clock_offset; | |
407 | info++; | |
408 | } | |
409 | ||
410 | BT_DBG("cache %p, copied %d", cache, copied); | |
411 | return copied; | |
412 | } | |
413 | ||
414 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
415 | { | |
416 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
417 | struct hci_cp_inquiry cp; | |
418 | ||
419 | BT_DBG("%s", hdev->name); | |
420 | ||
421 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
422 | return; | |
423 | ||
424 | /* Start Inquiry */ | |
425 | memcpy(&cp.lap, &ir->lap, 3); | |
426 | cp.length = ir->length; | |
427 | cp.num_rsp = ir->num_rsp; | |
a9de9248 | 428 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
1da177e4 LT |
429 | } |
430 | ||
431 | int hci_inquiry(void __user *arg) | |
432 | { | |
433 | __u8 __user *ptr = arg; | |
434 | struct hci_inquiry_req ir; | |
435 | struct hci_dev *hdev; | |
436 | int err = 0, do_inquiry = 0, max_rsp; | |
437 | long timeo; | |
438 | __u8 *buf; | |
439 | ||
440 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
441 | return -EFAULT; | |
442 | ||
5a08ecce AE |
443 | hdev = hci_dev_get(ir.dev_id); |
444 | if (!hdev) | |
1da177e4 LT |
445 | return -ENODEV; |
446 | ||
447 | hci_dev_lock_bh(hdev); | |
8e87d142 | 448 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
70f23020 AE |
449 | inquiry_cache_empty(hdev) || |
450 | ir.flags & IREQ_CACHE_FLUSH) { | |
1da177e4 LT |
451 | inquiry_cache_flush(hdev); |
452 | do_inquiry = 1; | |
453 | } | |
454 | hci_dev_unlock_bh(hdev); | |
455 | ||
04837f64 | 456 | timeo = ir.length * msecs_to_jiffies(2000); |
70f23020 AE |
457 | |
458 | if (do_inquiry) { | |
459 | err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo); | |
460 | if (err < 0) | |
461 | goto done; | |
462 | } | |
1da177e4 LT |
463 | |
464 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
465 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
466 | ||
467 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
468 | * copy it to the user space. | |
469 | */ | |
01df8c31 | 470 | buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL); |
70f23020 | 471 | if (!buf) { |
1da177e4 LT |
472 | err = -ENOMEM; |
473 | goto done; | |
474 | } | |
475 | ||
476 | hci_dev_lock_bh(hdev); | |
477 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); | |
478 | hci_dev_unlock_bh(hdev); | |
479 | ||
480 | BT_DBG("num_rsp %d", ir.num_rsp); | |
481 | ||
482 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
483 | ptr += sizeof(ir); | |
484 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
485 | ir.num_rsp)) | |
486 | err = -EFAULT; | |
8e87d142 | 487 | } else |
1da177e4 LT |
488 | err = -EFAULT; |
489 | ||
490 | kfree(buf); | |
491 | ||
492 | done: | |
493 | hci_dev_put(hdev); | |
494 | return err; | |
495 | } | |
496 | ||
497 | /* ---- HCI ioctl helpers ---- */ | |
498 | ||
499 | int hci_dev_open(__u16 dev) | |
500 | { | |
501 | struct hci_dev *hdev; | |
502 | int ret = 0; | |
503 | ||
5a08ecce AE |
504 | hdev = hci_dev_get(dev); |
505 | if (!hdev) | |
1da177e4 LT |
506 | return -ENODEV; |
507 | ||
508 | BT_DBG("%s %p", hdev->name, hdev); | |
509 | ||
510 | hci_req_lock(hdev); | |
511 | ||
611b30f7 MH |
512 | if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) { |
513 | ret = -ERFKILL; | |
514 | goto done; | |
515 | } | |
516 | ||
1da177e4 LT |
517 | if (test_bit(HCI_UP, &hdev->flags)) { |
518 | ret = -EALREADY; | |
519 | goto done; | |
520 | } | |
521 | ||
522 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
523 | set_bit(HCI_RAW, &hdev->flags); | |
524 | ||
943da25d MH |
525 | /* Treat all non BR/EDR controllers as raw devices for now */ |
526 | if (hdev->dev_type != HCI_BREDR) | |
527 | set_bit(HCI_RAW, &hdev->flags); | |
528 | ||
1da177e4 LT |
529 | if (hdev->open(hdev)) { |
530 | ret = -EIO; | |
531 | goto done; | |
532 | } | |
533 | ||
534 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
535 | atomic_set(&hdev->cmd_cnt, 1); | |
536 | set_bit(HCI_INIT, &hdev->flags); | |
a5040efa | 537 | hdev->init_last_cmd = 0; |
1da177e4 | 538 | |
04837f64 MH |
539 | ret = __hci_request(hdev, hci_init_req, 0, |
540 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 | 541 | |
6ed58ec5 VT |
542 | if (lmp_le_capable(hdev)) |
543 | ret = __hci_request(hdev, hci_le_init_req, 0, | |
544 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
545 | ||
1da177e4 LT |
546 | clear_bit(HCI_INIT, &hdev->flags); |
547 | } | |
548 | ||
549 | if (!ret) { | |
550 | hci_dev_hold(hdev); | |
551 | set_bit(HCI_UP, &hdev->flags); | |
552 | hci_notify(hdev, HCI_DEV_UP); | |
5add6af8 JH |
553 | if (!test_bit(HCI_SETUP, &hdev->flags)) |
554 | mgmt_powered(hdev->id, 1); | |
8e87d142 | 555 | } else { |
1da177e4 LT |
556 | /* Init failed, cleanup */ |
557 | tasklet_kill(&hdev->rx_task); | |
558 | tasklet_kill(&hdev->tx_task); | |
559 | tasklet_kill(&hdev->cmd_task); | |
560 | ||
561 | skb_queue_purge(&hdev->cmd_q); | |
562 | skb_queue_purge(&hdev->rx_q); | |
563 | ||
564 | if (hdev->flush) | |
565 | hdev->flush(hdev); | |
566 | ||
567 | if (hdev->sent_cmd) { | |
568 | kfree_skb(hdev->sent_cmd); | |
569 | hdev->sent_cmd = NULL; | |
570 | } | |
571 | ||
572 | hdev->close(hdev); | |
573 | hdev->flags = 0; | |
574 | } | |
575 | ||
576 | done: | |
577 | hci_req_unlock(hdev); | |
578 | hci_dev_put(hdev); | |
579 | return ret; | |
580 | } | |
581 | ||
582 | static int hci_dev_do_close(struct hci_dev *hdev) | |
583 | { | |
584 | BT_DBG("%s %p", hdev->name, hdev); | |
585 | ||
586 | hci_req_cancel(hdev, ENODEV); | |
587 | hci_req_lock(hdev); | |
588 | ||
6f5ef998 TG |
589 | /* Stop timer, it might be running */ |
590 | del_timer_sync(&hdev->cmd_timer); | |
591 | ||
1da177e4 | 592 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { |
b79f44c1 | 593 | del_timer_sync(&hdev->cmd_timer); |
1da177e4 LT |
594 | hci_req_unlock(hdev); |
595 | return 0; | |
596 | } | |
597 | ||
598 | /* Kill RX and TX tasks */ | |
599 | tasklet_kill(&hdev->rx_task); | |
600 | tasklet_kill(&hdev->tx_task); | |
601 | ||
602 | hci_dev_lock_bh(hdev); | |
603 | inquiry_cache_flush(hdev); | |
604 | hci_conn_hash_flush(hdev); | |
605 | hci_dev_unlock_bh(hdev); | |
606 | ||
607 | hci_notify(hdev, HCI_DEV_DOWN); | |
608 | ||
609 | if (hdev->flush) | |
610 | hdev->flush(hdev); | |
611 | ||
612 | /* Reset device */ | |
613 | skb_queue_purge(&hdev->cmd_q); | |
614 | atomic_set(&hdev->cmd_cnt, 1); | |
615 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
616 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 MH |
617 | __hci_request(hdev, hci_reset_req, 0, |
618 | msecs_to_jiffies(250)); | |
1da177e4 LT |
619 | clear_bit(HCI_INIT, &hdev->flags); |
620 | } | |
621 | ||
622 | /* Kill cmd task */ | |
623 | tasklet_kill(&hdev->cmd_task); | |
624 | ||
625 | /* Drop queues */ | |
626 | skb_queue_purge(&hdev->rx_q); | |
627 | skb_queue_purge(&hdev->cmd_q); | |
628 | skb_queue_purge(&hdev->raw_q); | |
629 | ||
630 | /* Drop last sent command */ | |
631 | if (hdev->sent_cmd) { | |
632 | kfree_skb(hdev->sent_cmd); | |
633 | hdev->sent_cmd = NULL; | |
634 | } | |
635 | ||
636 | /* After this point our queues are empty | |
637 | * and no tasks are scheduled. */ | |
638 | hdev->close(hdev); | |
639 | ||
5add6af8 JH |
640 | mgmt_powered(hdev->id, 0); |
641 | ||
1da177e4 LT |
642 | /* Clear flags */ |
643 | hdev->flags = 0; | |
644 | ||
645 | hci_req_unlock(hdev); | |
646 | ||
647 | hci_dev_put(hdev); | |
648 | return 0; | |
649 | } | |
650 | ||
651 | int hci_dev_close(__u16 dev) | |
652 | { | |
653 | struct hci_dev *hdev; | |
654 | int err; | |
655 | ||
70f23020 AE |
656 | hdev = hci_dev_get(dev); |
657 | if (!hdev) | |
1da177e4 LT |
658 | return -ENODEV; |
659 | err = hci_dev_do_close(hdev); | |
660 | hci_dev_put(hdev); | |
661 | return err; | |
662 | } | |
663 | ||
664 | int hci_dev_reset(__u16 dev) | |
665 | { | |
666 | struct hci_dev *hdev; | |
667 | int ret = 0; | |
668 | ||
70f23020 AE |
669 | hdev = hci_dev_get(dev); |
670 | if (!hdev) | |
1da177e4 LT |
671 | return -ENODEV; |
672 | ||
673 | hci_req_lock(hdev); | |
674 | tasklet_disable(&hdev->tx_task); | |
675 | ||
676 | if (!test_bit(HCI_UP, &hdev->flags)) | |
677 | goto done; | |
678 | ||
679 | /* Drop queues */ | |
680 | skb_queue_purge(&hdev->rx_q); | |
681 | skb_queue_purge(&hdev->cmd_q); | |
682 | ||
683 | hci_dev_lock_bh(hdev); | |
684 | inquiry_cache_flush(hdev); | |
685 | hci_conn_hash_flush(hdev); | |
686 | hci_dev_unlock_bh(hdev); | |
687 | ||
688 | if (hdev->flush) | |
689 | hdev->flush(hdev); | |
690 | ||
8e87d142 | 691 | atomic_set(&hdev->cmd_cnt, 1); |
6ed58ec5 | 692 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0; |
1da177e4 LT |
693 | |
694 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
695 | ret = __hci_request(hdev, hci_reset_req, 0, |
696 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
697 | |
698 | done: | |
699 | tasklet_enable(&hdev->tx_task); | |
700 | hci_req_unlock(hdev); | |
701 | hci_dev_put(hdev); | |
702 | return ret; | |
703 | } | |
704 | ||
705 | int hci_dev_reset_stat(__u16 dev) | |
706 | { | |
707 | struct hci_dev *hdev; | |
708 | int ret = 0; | |
709 | ||
70f23020 AE |
710 | hdev = hci_dev_get(dev); |
711 | if (!hdev) | |
1da177e4 LT |
712 | return -ENODEV; |
713 | ||
714 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
715 | ||
716 | hci_dev_put(hdev); | |
717 | ||
718 | return ret; | |
719 | } | |
720 | ||
721 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
722 | { | |
723 | struct hci_dev *hdev; | |
724 | struct hci_dev_req dr; | |
725 | int err = 0; | |
726 | ||
727 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
728 | return -EFAULT; | |
729 | ||
70f23020 AE |
730 | hdev = hci_dev_get(dr.dev_id); |
731 | if (!hdev) | |
1da177e4 LT |
732 | return -ENODEV; |
733 | ||
734 | switch (cmd) { | |
735 | case HCISETAUTH: | |
04837f64 MH |
736 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
737 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
738 | break; |
739 | ||
740 | case HCISETENCRYPT: | |
741 | if (!lmp_encrypt_capable(hdev)) { | |
742 | err = -EOPNOTSUPP; | |
743 | break; | |
744 | } | |
745 | ||
746 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
747 | /* Auth must be enabled first */ | |
04837f64 MH |
748 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
749 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
750 | if (err) |
751 | break; | |
752 | } | |
753 | ||
04837f64 MH |
754 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
755 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
756 | break; |
757 | ||
758 | case HCISETSCAN: | |
04837f64 MH |
759 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
760 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
761 | break; |
762 | ||
1da177e4 | 763 | case HCISETLINKPOL: |
e4e8e37c MH |
764 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
765 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
766 | break; |
767 | ||
768 | case HCISETLINKMODE: | |
e4e8e37c MH |
769 | hdev->link_mode = ((__u16) dr.dev_opt) & |
770 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
771 | break; | |
772 | ||
773 | case HCISETPTYPE: | |
774 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
775 | break; |
776 | ||
777 | case HCISETACLMTU: | |
e4e8e37c MH |
778 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
779 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
780 | break; |
781 | ||
782 | case HCISETSCOMTU: | |
e4e8e37c MH |
783 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
784 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
785 | break; |
786 | ||
787 | default: | |
788 | err = -EINVAL; | |
789 | break; | |
790 | } | |
e4e8e37c | 791 | |
1da177e4 LT |
792 | hci_dev_put(hdev); |
793 | return err; | |
794 | } | |
795 | ||
796 | int hci_get_dev_list(void __user *arg) | |
797 | { | |
798 | struct hci_dev_list_req *dl; | |
799 | struct hci_dev_req *dr; | |
800 | struct list_head *p; | |
801 | int n = 0, size, err; | |
802 | __u16 dev_num; | |
803 | ||
804 | if (get_user(dev_num, (__u16 __user *) arg)) | |
805 | return -EFAULT; | |
806 | ||
807 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
808 | return -EINVAL; | |
809 | ||
810 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
811 | ||
70f23020 AE |
812 | dl = kzalloc(size, GFP_KERNEL); |
813 | if (!dl) | |
1da177e4 LT |
814 | return -ENOMEM; |
815 | ||
816 | dr = dl->dev_req; | |
817 | ||
818 | read_lock_bh(&hci_dev_list_lock); | |
819 | list_for_each(p, &hci_dev_list) { | |
820 | struct hci_dev *hdev; | |
c542a06c | 821 | |
1da177e4 | 822 | hdev = list_entry(p, struct hci_dev, list); |
c542a06c | 823 | |
ab81cbf9 | 824 | hci_del_off_timer(hdev); |
c542a06c JH |
825 | |
826 | if (!test_bit(HCI_MGMT, &hdev->flags)) | |
827 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
828 | ||
1da177e4 LT |
829 | (dr + n)->dev_id = hdev->id; |
830 | (dr + n)->dev_opt = hdev->flags; | |
c542a06c | 831 | |
1da177e4 LT |
832 | if (++n >= dev_num) |
833 | break; | |
834 | } | |
835 | read_unlock_bh(&hci_dev_list_lock); | |
836 | ||
837 | dl->dev_num = n; | |
838 | size = sizeof(*dl) + n * sizeof(*dr); | |
839 | ||
840 | err = copy_to_user(arg, dl, size); | |
841 | kfree(dl); | |
842 | ||
843 | return err ? -EFAULT : 0; | |
844 | } | |
845 | ||
846 | int hci_get_dev_info(void __user *arg) | |
847 | { | |
848 | struct hci_dev *hdev; | |
849 | struct hci_dev_info di; | |
850 | int err = 0; | |
851 | ||
852 | if (copy_from_user(&di, arg, sizeof(di))) | |
853 | return -EFAULT; | |
854 | ||
70f23020 AE |
855 | hdev = hci_dev_get(di.dev_id); |
856 | if (!hdev) | |
1da177e4 LT |
857 | return -ENODEV; |
858 | ||
ab81cbf9 JH |
859 | hci_del_off_timer(hdev); |
860 | ||
c542a06c JH |
861 | if (!test_bit(HCI_MGMT, &hdev->flags)) |
862 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
863 | ||
1da177e4 LT |
864 | strcpy(di.name, hdev->name); |
865 | di.bdaddr = hdev->bdaddr; | |
943da25d | 866 | di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4); |
1da177e4 LT |
867 | di.flags = hdev->flags; |
868 | di.pkt_type = hdev->pkt_type; | |
869 | di.acl_mtu = hdev->acl_mtu; | |
870 | di.acl_pkts = hdev->acl_pkts; | |
871 | di.sco_mtu = hdev->sco_mtu; | |
872 | di.sco_pkts = hdev->sco_pkts; | |
873 | di.link_policy = hdev->link_policy; | |
874 | di.link_mode = hdev->link_mode; | |
875 | ||
876 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
877 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
878 | ||
879 | if (copy_to_user(arg, &di, sizeof(di))) | |
880 | err = -EFAULT; | |
881 | ||
882 | hci_dev_put(hdev); | |
883 | ||
884 | return err; | |
885 | } | |
886 | ||
887 | /* ---- Interface to HCI drivers ---- */ | |
888 | ||
611b30f7 MH |
889 | static int hci_rfkill_set_block(void *data, bool blocked) |
890 | { | |
891 | struct hci_dev *hdev = data; | |
892 | ||
893 | BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); | |
894 | ||
895 | if (!blocked) | |
896 | return 0; | |
897 | ||
898 | hci_dev_do_close(hdev); | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | static const struct rfkill_ops hci_rfkill_ops = { | |
904 | .set_block = hci_rfkill_set_block, | |
905 | }; | |
906 | ||
1da177e4 LT |
907 | /* Alloc HCI device */ |
908 | struct hci_dev *hci_alloc_dev(void) | |
909 | { | |
910 | struct hci_dev *hdev; | |
911 | ||
25ea6db0 | 912 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
913 | if (!hdev) |
914 | return NULL; | |
915 | ||
1da177e4 LT |
916 | skb_queue_head_init(&hdev->driver_init); |
917 | ||
918 | return hdev; | |
919 | } | |
920 | EXPORT_SYMBOL(hci_alloc_dev); | |
921 | ||
922 | /* Free HCI device */ | |
923 | void hci_free_dev(struct hci_dev *hdev) | |
924 | { | |
925 | skb_queue_purge(&hdev->driver_init); | |
926 | ||
a91f2e39 MH |
927 | /* will free via device release */ |
928 | put_device(&hdev->dev); | |
1da177e4 LT |
929 | } |
930 | EXPORT_SYMBOL(hci_free_dev); | |
931 | ||
ab81cbf9 JH |
932 | static void hci_power_on(struct work_struct *work) |
933 | { | |
934 | struct hci_dev *hdev = container_of(work, struct hci_dev, power_on); | |
935 | ||
936 | BT_DBG("%s", hdev->name); | |
937 | ||
938 | if (hci_dev_open(hdev->id) < 0) | |
939 | return; | |
940 | ||
941 | if (test_bit(HCI_AUTO_OFF, &hdev->flags)) | |
942 | mod_timer(&hdev->off_timer, | |
943 | jiffies + msecs_to_jiffies(AUTO_OFF_TIMEOUT)); | |
944 | ||
945 | if (test_and_clear_bit(HCI_SETUP, &hdev->flags)) | |
946 | mgmt_index_added(hdev->id); | |
947 | } | |
948 | ||
949 | static void hci_power_off(struct work_struct *work) | |
950 | { | |
951 | struct hci_dev *hdev = container_of(work, struct hci_dev, power_off); | |
952 | ||
953 | BT_DBG("%s", hdev->name); | |
954 | ||
955 | hci_dev_close(hdev->id); | |
956 | } | |
957 | ||
958 | static void hci_auto_off(unsigned long data) | |
959 | { | |
960 | struct hci_dev *hdev = (struct hci_dev *) data; | |
961 | ||
962 | BT_DBG("%s", hdev->name); | |
963 | ||
964 | clear_bit(HCI_AUTO_OFF, &hdev->flags); | |
965 | ||
966 | queue_work(hdev->workqueue, &hdev->power_off); | |
967 | } | |
968 | ||
969 | void hci_del_off_timer(struct hci_dev *hdev) | |
970 | { | |
971 | BT_DBG("%s", hdev->name); | |
972 | ||
973 | clear_bit(HCI_AUTO_OFF, &hdev->flags); | |
974 | del_timer(&hdev->off_timer); | |
975 | } | |
976 | ||
2aeb9a1a JH |
977 | int hci_uuids_clear(struct hci_dev *hdev) |
978 | { | |
979 | struct list_head *p, *n; | |
980 | ||
981 | list_for_each_safe(p, n, &hdev->uuids) { | |
982 | struct bt_uuid *uuid; | |
983 | ||
984 | uuid = list_entry(p, struct bt_uuid, list); | |
985 | ||
986 | list_del(p); | |
987 | kfree(uuid); | |
988 | } | |
989 | ||
990 | return 0; | |
991 | } | |
992 | ||
55ed8ca1 JH |
993 | int hci_link_keys_clear(struct hci_dev *hdev) |
994 | { | |
995 | struct list_head *p, *n; | |
996 | ||
997 | list_for_each_safe(p, n, &hdev->link_keys) { | |
998 | struct link_key *key; | |
999 | ||
1000 | key = list_entry(p, struct link_key, list); | |
1001 | ||
1002 | list_del(p); | |
1003 | kfree(key); | |
1004 | } | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1010 | { | |
1011 | struct list_head *p; | |
1012 | ||
1013 | list_for_each(p, &hdev->link_keys) { | |
1014 | struct link_key *k; | |
1015 | ||
1016 | k = list_entry(p, struct link_key, list); | |
1017 | ||
1018 | if (bacmp(bdaddr, &k->bdaddr) == 0) | |
1019 | return k; | |
1020 | } | |
1021 | ||
1022 | return NULL; | |
1023 | } | |
1024 | ||
d25e28ab JH |
1025 | static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn, |
1026 | u8 key_type, u8 old_key_type) | |
1027 | { | |
1028 | /* Legacy key */ | |
1029 | if (key_type < 0x03) | |
1030 | return 1; | |
1031 | ||
1032 | /* Debug keys are insecure so don't store them persistently */ | |
1033 | if (key_type == HCI_LK_DEBUG_COMBINATION) | |
1034 | return 0; | |
1035 | ||
1036 | /* Changed combination key and there's no previous one */ | |
1037 | if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff) | |
1038 | return 0; | |
1039 | ||
1040 | /* Security mode 3 case */ | |
1041 | if (!conn) | |
1042 | return 1; | |
1043 | ||
1044 | /* Neither local nor remote side had no-bonding as requirement */ | |
1045 | if (conn->auth_type > 0x01 && conn->remote_auth > 0x01) | |
1046 | return 1; | |
1047 | ||
1048 | /* Local side had dedicated bonding as requirement */ | |
1049 | if (conn->auth_type == 0x02 || conn->auth_type == 0x03) | |
1050 | return 1; | |
1051 | ||
1052 | /* Remote side had dedicated bonding as requirement */ | |
1053 | if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03) | |
1054 | return 1; | |
1055 | ||
1056 | /* If none of the above criteria match, then don't store the key | |
1057 | * persistently */ | |
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key, | |
1062 | bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len) | |
55ed8ca1 JH |
1063 | { |
1064 | struct link_key *key, *old_key; | |
1065 | u8 old_key_type; | |
1066 | ||
1067 | old_key = hci_find_link_key(hdev, bdaddr); | |
1068 | if (old_key) { | |
1069 | old_key_type = old_key->type; | |
1070 | key = old_key; | |
1071 | } else { | |
12adcf3a | 1072 | old_key_type = conn ? conn->key_type : 0xff; |
55ed8ca1 JH |
1073 | key = kzalloc(sizeof(*key), GFP_ATOMIC); |
1074 | if (!key) | |
1075 | return -ENOMEM; | |
1076 | list_add(&key->list, &hdev->link_keys); | |
1077 | } | |
1078 | ||
1079 | BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type); | |
1080 | ||
d25e28ab JH |
1081 | /* Some buggy controller combinations generate a changed |
1082 | * combination key for legacy pairing even when there's no | |
1083 | * previous key */ | |
1084 | if (type == HCI_LK_CHANGED_COMBINATION && | |
1085 | (!conn || conn->remote_auth == 0xff) && | |
1086 | old_key_type == 0xff) | |
1087 | type = HCI_LK_COMBINATION; | |
1088 | ||
1089 | if (new_key && !hci_persistent_key(hdev, conn, type, old_key_type)) { | |
1090 | list_del(&key->list); | |
1091 | kfree(key); | |
1092 | return 0; | |
1093 | } | |
1094 | ||
55ed8ca1 JH |
1095 | bacpy(&key->bdaddr, bdaddr); |
1096 | memcpy(key->val, val, 16); | |
1097 | key->type = type; | |
1098 | key->pin_len = pin_len; | |
1099 | ||
1100 | if (new_key) | |
1101 | mgmt_new_key(hdev->id, key, old_key_type); | |
1102 | ||
b6020ba0 | 1103 | if (type == HCI_LK_CHANGED_COMBINATION) |
55ed8ca1 JH |
1104 | key->type = old_key_type; |
1105 | ||
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1110 | { | |
1111 | struct link_key *key; | |
1112 | ||
1113 | key = hci_find_link_key(hdev, bdaddr); | |
1114 | if (!key) | |
1115 | return -ENOENT; | |
1116 | ||
1117 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1118 | ||
1119 | list_del(&key->list); | |
1120 | kfree(key); | |
1121 | ||
1122 | return 0; | |
1123 | } | |
1124 | ||
6bd32326 VT |
1125 | /* HCI command timer function */ |
1126 | static void hci_cmd_timer(unsigned long arg) | |
1127 | { | |
1128 | struct hci_dev *hdev = (void *) arg; | |
1129 | ||
1130 | BT_ERR("%s command tx timeout", hdev->name); | |
1131 | atomic_set(&hdev->cmd_cnt, 1); | |
10572132 | 1132 | clear_bit(HCI_RESET, &hdev->flags); |
6bd32326 VT |
1133 | tasklet_schedule(&hdev->cmd_task); |
1134 | } | |
1135 | ||
2763eda6 SJ |
1136 | struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev, |
1137 | bdaddr_t *bdaddr) | |
1138 | { | |
1139 | struct oob_data *data; | |
1140 | ||
1141 | list_for_each_entry(data, &hdev->remote_oob_data, list) | |
1142 | if (bacmp(bdaddr, &data->bdaddr) == 0) | |
1143 | return data; | |
1144 | ||
1145 | return NULL; | |
1146 | } | |
1147 | ||
1148 | int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1149 | { | |
1150 | struct oob_data *data; | |
1151 | ||
1152 | data = hci_find_remote_oob_data(hdev, bdaddr); | |
1153 | if (!data) | |
1154 | return -ENOENT; | |
1155 | ||
1156 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1157 | ||
1158 | list_del(&data->list); | |
1159 | kfree(data); | |
1160 | ||
1161 | return 0; | |
1162 | } | |
1163 | ||
1164 | int hci_remote_oob_data_clear(struct hci_dev *hdev) | |
1165 | { | |
1166 | struct oob_data *data, *n; | |
1167 | ||
1168 | list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) { | |
1169 | list_del(&data->list); | |
1170 | kfree(data); | |
1171 | } | |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash, | |
1177 | u8 *randomizer) | |
1178 | { | |
1179 | struct oob_data *data; | |
1180 | ||
1181 | data = hci_find_remote_oob_data(hdev, bdaddr); | |
1182 | ||
1183 | if (!data) { | |
1184 | data = kmalloc(sizeof(*data), GFP_ATOMIC); | |
1185 | if (!data) | |
1186 | return -ENOMEM; | |
1187 | ||
1188 | bacpy(&data->bdaddr, bdaddr); | |
1189 | list_add(&data->list, &hdev->remote_oob_data); | |
1190 | } | |
1191 | ||
1192 | memcpy(data->hash, hash, sizeof(data->hash)); | |
1193 | memcpy(data->randomizer, randomizer, sizeof(data->randomizer)); | |
1194 | ||
1195 | BT_DBG("%s for %s", hdev->name, batostr(bdaddr)); | |
1196 | ||
1197 | return 0; | |
1198 | } | |
1199 | ||
1da177e4 LT |
1200 | /* Register HCI device */ |
1201 | int hci_register_dev(struct hci_dev *hdev) | |
1202 | { | |
1203 | struct list_head *head = &hci_dev_list, *p; | |
ef222013 | 1204 | int i, id = 0; |
1da177e4 | 1205 | |
c13854ce MH |
1206 | BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name, |
1207 | hdev->bus, hdev->owner); | |
1da177e4 LT |
1208 | |
1209 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
1210 | return -EINVAL; | |
1211 | ||
1212 | write_lock_bh(&hci_dev_list_lock); | |
1213 | ||
1214 | /* Find first available device id */ | |
1215 | list_for_each(p, &hci_dev_list) { | |
1216 | if (list_entry(p, struct hci_dev, list)->id != id) | |
1217 | break; | |
1218 | head = p; id++; | |
1219 | } | |
8e87d142 | 1220 | |
1da177e4 LT |
1221 | sprintf(hdev->name, "hci%d", id); |
1222 | hdev->id = id; | |
1223 | list_add(&hdev->list, head); | |
1224 | ||
1225 | atomic_set(&hdev->refcnt, 1); | |
1226 | spin_lock_init(&hdev->lock); | |
1227 | ||
1228 | hdev->flags = 0; | |
1229 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 1230 | hdev->esco_type = (ESCO_HV1); |
1da177e4 | 1231 | hdev->link_mode = (HCI_LM_ACCEPT); |
17fa4b9d | 1232 | hdev->io_capability = 0x03; /* No Input No Output */ |
1da177e4 | 1233 | |
04837f64 MH |
1234 | hdev->idle_timeout = 0; |
1235 | hdev->sniff_max_interval = 800; | |
1236 | hdev->sniff_min_interval = 80; | |
1237 | ||
70f23020 | 1238 | tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev); |
1da177e4 LT |
1239 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); |
1240 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
1241 | ||
1242 | skb_queue_head_init(&hdev->rx_q); | |
1243 | skb_queue_head_init(&hdev->cmd_q); | |
1244 | skb_queue_head_init(&hdev->raw_q); | |
1245 | ||
6bd32326 VT |
1246 | setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev); |
1247 | ||
cd4c5391 | 1248 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1249 | hdev->reassembly[i] = NULL; |
1250 | ||
1da177e4 | 1251 | init_waitqueue_head(&hdev->req_wait_q); |
a6a67efd | 1252 | mutex_init(&hdev->req_lock); |
1da177e4 LT |
1253 | |
1254 | inquiry_cache_init(hdev); | |
1255 | ||
1256 | hci_conn_hash_init(hdev); | |
1257 | ||
ea4bd8ba | 1258 | INIT_LIST_HEAD(&hdev->blacklist); |
f0358568 | 1259 | |
2aeb9a1a JH |
1260 | INIT_LIST_HEAD(&hdev->uuids); |
1261 | ||
55ed8ca1 JH |
1262 | INIT_LIST_HEAD(&hdev->link_keys); |
1263 | ||
2763eda6 SJ |
1264 | INIT_LIST_HEAD(&hdev->remote_oob_data); |
1265 | ||
ab81cbf9 JH |
1266 | INIT_WORK(&hdev->power_on, hci_power_on); |
1267 | INIT_WORK(&hdev->power_off, hci_power_off); | |
1268 | setup_timer(&hdev->off_timer, hci_auto_off, (unsigned long) hdev); | |
1269 | ||
1da177e4 LT |
1270 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
1271 | ||
1272 | atomic_set(&hdev->promisc, 0); | |
1273 | ||
1274 | write_unlock_bh(&hci_dev_list_lock); | |
1275 | ||
f48fd9c8 MH |
1276 | hdev->workqueue = create_singlethread_workqueue(hdev->name); |
1277 | if (!hdev->workqueue) | |
1278 | goto nomem; | |
1279 | ||
1da177e4 LT |
1280 | hci_register_sysfs(hdev); |
1281 | ||
611b30f7 MH |
1282 | hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
1283 | RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev); | |
1284 | if (hdev->rfkill) { | |
1285 | if (rfkill_register(hdev->rfkill) < 0) { | |
1286 | rfkill_destroy(hdev->rfkill); | |
1287 | hdev->rfkill = NULL; | |
1288 | } | |
1289 | } | |
1290 | ||
ab81cbf9 JH |
1291 | set_bit(HCI_AUTO_OFF, &hdev->flags); |
1292 | set_bit(HCI_SETUP, &hdev->flags); | |
1293 | queue_work(hdev->workqueue, &hdev->power_on); | |
1294 | ||
1da177e4 LT |
1295 | hci_notify(hdev, HCI_DEV_REG); |
1296 | ||
1297 | return id; | |
f48fd9c8 MH |
1298 | |
1299 | nomem: | |
1300 | write_lock_bh(&hci_dev_list_lock); | |
1301 | list_del(&hdev->list); | |
1302 | write_unlock_bh(&hci_dev_list_lock); | |
1303 | ||
1304 | return -ENOMEM; | |
1da177e4 LT |
1305 | } |
1306 | EXPORT_SYMBOL(hci_register_dev); | |
1307 | ||
1308 | /* Unregister HCI device */ | |
1309 | int hci_unregister_dev(struct hci_dev *hdev) | |
1310 | { | |
ef222013 MH |
1311 | int i; |
1312 | ||
c13854ce | 1313 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
1da177e4 | 1314 | |
1da177e4 LT |
1315 | write_lock_bh(&hci_dev_list_lock); |
1316 | list_del(&hdev->list); | |
1317 | write_unlock_bh(&hci_dev_list_lock); | |
1318 | ||
1319 | hci_dev_do_close(hdev); | |
1320 | ||
cd4c5391 | 1321 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1322 | kfree_skb(hdev->reassembly[i]); |
1323 | ||
ab81cbf9 JH |
1324 | if (!test_bit(HCI_INIT, &hdev->flags) && |
1325 | !test_bit(HCI_SETUP, &hdev->flags)) | |
1326 | mgmt_index_removed(hdev->id); | |
1327 | ||
1da177e4 LT |
1328 | hci_notify(hdev, HCI_DEV_UNREG); |
1329 | ||
611b30f7 MH |
1330 | if (hdev->rfkill) { |
1331 | rfkill_unregister(hdev->rfkill); | |
1332 | rfkill_destroy(hdev->rfkill); | |
1333 | } | |
1334 | ||
147e2d59 DY |
1335 | hci_unregister_sysfs(hdev); |
1336 | ||
c6f3c5f7 GP |
1337 | hci_del_off_timer(hdev); |
1338 | ||
f48fd9c8 MH |
1339 | destroy_workqueue(hdev->workqueue); |
1340 | ||
e2e0cacb JH |
1341 | hci_dev_lock_bh(hdev); |
1342 | hci_blacklist_clear(hdev); | |
2aeb9a1a | 1343 | hci_uuids_clear(hdev); |
55ed8ca1 | 1344 | hci_link_keys_clear(hdev); |
2763eda6 | 1345 | hci_remote_oob_data_clear(hdev); |
e2e0cacb JH |
1346 | hci_dev_unlock_bh(hdev); |
1347 | ||
1da177e4 | 1348 | __hci_dev_put(hdev); |
ef222013 | 1349 | |
1da177e4 LT |
1350 | return 0; |
1351 | } | |
1352 | EXPORT_SYMBOL(hci_unregister_dev); | |
1353 | ||
1354 | /* Suspend HCI device */ | |
1355 | int hci_suspend_dev(struct hci_dev *hdev) | |
1356 | { | |
1357 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
1358 | return 0; | |
1359 | } | |
1360 | EXPORT_SYMBOL(hci_suspend_dev); | |
1361 | ||
1362 | /* Resume HCI device */ | |
1363 | int hci_resume_dev(struct hci_dev *hdev) | |
1364 | { | |
1365 | hci_notify(hdev, HCI_DEV_RESUME); | |
1366 | return 0; | |
1367 | } | |
1368 | EXPORT_SYMBOL(hci_resume_dev); | |
1369 | ||
76bca880 MH |
1370 | /* Receive frame from HCI drivers */ |
1371 | int hci_recv_frame(struct sk_buff *skb) | |
1372 | { | |
1373 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1374 | if (!hdev || (!test_bit(HCI_UP, &hdev->flags) | |
1375 | && !test_bit(HCI_INIT, &hdev->flags))) { | |
1376 | kfree_skb(skb); | |
1377 | return -ENXIO; | |
1378 | } | |
1379 | ||
1380 | /* Incomming skb */ | |
1381 | bt_cb(skb)->incoming = 1; | |
1382 | ||
1383 | /* Time stamp */ | |
1384 | __net_timestamp(skb); | |
1385 | ||
1386 | /* Queue frame for rx task */ | |
1387 | skb_queue_tail(&hdev->rx_q, skb); | |
c78ae283 MH |
1388 | tasklet_schedule(&hdev->rx_task); |
1389 | ||
76bca880 MH |
1390 | return 0; |
1391 | } | |
1392 | EXPORT_SYMBOL(hci_recv_frame); | |
1393 | ||
33e882a5 | 1394 | static int hci_reassembly(struct hci_dev *hdev, int type, void *data, |
1e429f38 | 1395 | int count, __u8 index) |
33e882a5 SS |
1396 | { |
1397 | int len = 0; | |
1398 | int hlen = 0; | |
1399 | int remain = count; | |
1400 | struct sk_buff *skb; | |
1401 | struct bt_skb_cb *scb; | |
1402 | ||
1403 | if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) || | |
1404 | index >= NUM_REASSEMBLY) | |
1405 | return -EILSEQ; | |
1406 | ||
1407 | skb = hdev->reassembly[index]; | |
1408 | ||
1409 | if (!skb) { | |
1410 | switch (type) { | |
1411 | case HCI_ACLDATA_PKT: | |
1412 | len = HCI_MAX_FRAME_SIZE; | |
1413 | hlen = HCI_ACL_HDR_SIZE; | |
1414 | break; | |
1415 | case HCI_EVENT_PKT: | |
1416 | len = HCI_MAX_EVENT_SIZE; | |
1417 | hlen = HCI_EVENT_HDR_SIZE; | |
1418 | break; | |
1419 | case HCI_SCODATA_PKT: | |
1420 | len = HCI_MAX_SCO_SIZE; | |
1421 | hlen = HCI_SCO_HDR_SIZE; | |
1422 | break; | |
1423 | } | |
1424 | ||
1e429f38 | 1425 | skb = bt_skb_alloc(len, GFP_ATOMIC); |
33e882a5 SS |
1426 | if (!skb) |
1427 | return -ENOMEM; | |
1428 | ||
1429 | scb = (void *) skb->cb; | |
1430 | scb->expect = hlen; | |
1431 | scb->pkt_type = type; | |
1432 | ||
1433 | skb->dev = (void *) hdev; | |
1434 | hdev->reassembly[index] = skb; | |
1435 | } | |
1436 | ||
1437 | while (count) { | |
1438 | scb = (void *) skb->cb; | |
1439 | len = min(scb->expect, (__u16)count); | |
1440 | ||
1441 | memcpy(skb_put(skb, len), data, len); | |
1442 | ||
1443 | count -= len; | |
1444 | data += len; | |
1445 | scb->expect -= len; | |
1446 | remain = count; | |
1447 | ||
1448 | switch (type) { | |
1449 | case HCI_EVENT_PKT: | |
1450 | if (skb->len == HCI_EVENT_HDR_SIZE) { | |
1451 | struct hci_event_hdr *h = hci_event_hdr(skb); | |
1452 | scb->expect = h->plen; | |
1453 | ||
1454 | if (skb_tailroom(skb) < scb->expect) { | |
1455 | kfree_skb(skb); | |
1456 | hdev->reassembly[index] = NULL; | |
1457 | return -ENOMEM; | |
1458 | } | |
1459 | } | |
1460 | break; | |
1461 | ||
1462 | case HCI_ACLDATA_PKT: | |
1463 | if (skb->len == HCI_ACL_HDR_SIZE) { | |
1464 | struct hci_acl_hdr *h = hci_acl_hdr(skb); | |
1465 | scb->expect = __le16_to_cpu(h->dlen); | |
1466 | ||
1467 | if (skb_tailroom(skb) < scb->expect) { | |
1468 | kfree_skb(skb); | |
1469 | hdev->reassembly[index] = NULL; | |
1470 | return -ENOMEM; | |
1471 | } | |
1472 | } | |
1473 | break; | |
1474 | ||
1475 | case HCI_SCODATA_PKT: | |
1476 | if (skb->len == HCI_SCO_HDR_SIZE) { | |
1477 | struct hci_sco_hdr *h = hci_sco_hdr(skb); | |
1478 | scb->expect = h->dlen; | |
1479 | ||
1480 | if (skb_tailroom(skb) < scb->expect) { | |
1481 | kfree_skb(skb); | |
1482 | hdev->reassembly[index] = NULL; | |
1483 | return -ENOMEM; | |
1484 | } | |
1485 | } | |
1486 | break; | |
1487 | } | |
1488 | ||
1489 | if (scb->expect == 0) { | |
1490 | /* Complete frame */ | |
1491 | ||
1492 | bt_cb(skb)->pkt_type = type; | |
1493 | hci_recv_frame(skb); | |
1494 | ||
1495 | hdev->reassembly[index] = NULL; | |
1496 | return remain; | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | return remain; | |
1501 | } | |
1502 | ||
ef222013 MH |
1503 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) |
1504 | { | |
f39a3c06 SS |
1505 | int rem = 0; |
1506 | ||
ef222013 MH |
1507 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) |
1508 | return -EILSEQ; | |
1509 | ||
da5f6c37 | 1510 | while (count) { |
1e429f38 | 1511 | rem = hci_reassembly(hdev, type, data, count, type - 1); |
f39a3c06 SS |
1512 | if (rem < 0) |
1513 | return rem; | |
ef222013 | 1514 | |
f39a3c06 SS |
1515 | data += (count - rem); |
1516 | count = rem; | |
da5f6c37 | 1517 | }; |
ef222013 | 1518 | |
f39a3c06 | 1519 | return rem; |
ef222013 MH |
1520 | } |
1521 | EXPORT_SYMBOL(hci_recv_fragment); | |
1522 | ||
99811510 SS |
1523 | #define STREAM_REASSEMBLY 0 |
1524 | ||
1525 | int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count) | |
1526 | { | |
1527 | int type; | |
1528 | int rem = 0; | |
1529 | ||
da5f6c37 | 1530 | while (count) { |
99811510 SS |
1531 | struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY]; |
1532 | ||
1533 | if (!skb) { | |
1534 | struct { char type; } *pkt; | |
1535 | ||
1536 | /* Start of the frame */ | |
1537 | pkt = data; | |
1538 | type = pkt->type; | |
1539 | ||
1540 | data++; | |
1541 | count--; | |
1542 | } else | |
1543 | type = bt_cb(skb)->pkt_type; | |
1544 | ||
1e429f38 GP |
1545 | rem = hci_reassembly(hdev, type, data, count, |
1546 | STREAM_REASSEMBLY); | |
99811510 SS |
1547 | if (rem < 0) |
1548 | return rem; | |
1549 | ||
1550 | data += (count - rem); | |
1551 | count = rem; | |
da5f6c37 | 1552 | }; |
99811510 SS |
1553 | |
1554 | return rem; | |
1555 | } | |
1556 | EXPORT_SYMBOL(hci_recv_stream_fragment); | |
1557 | ||
1da177e4 LT |
1558 | /* ---- Interface to upper protocols ---- */ |
1559 | ||
1560 | /* Register/Unregister protocols. | |
1561 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1562 | int hci_register_proto(struct hci_proto *hp) | |
1563 | { | |
1564 | int err = 0; | |
1565 | ||
1566 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1567 | ||
1568 | if (hp->id >= HCI_MAX_PROTO) | |
1569 | return -EINVAL; | |
1570 | ||
1571 | write_lock_bh(&hci_task_lock); | |
1572 | ||
1573 | if (!hci_proto[hp->id]) | |
1574 | hci_proto[hp->id] = hp; | |
1575 | else | |
1576 | err = -EEXIST; | |
1577 | ||
1578 | write_unlock_bh(&hci_task_lock); | |
1579 | ||
1580 | return err; | |
1581 | } | |
1582 | EXPORT_SYMBOL(hci_register_proto); | |
1583 | ||
1584 | int hci_unregister_proto(struct hci_proto *hp) | |
1585 | { | |
1586 | int err = 0; | |
1587 | ||
1588 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1589 | ||
1590 | if (hp->id >= HCI_MAX_PROTO) | |
1591 | return -EINVAL; | |
1592 | ||
1593 | write_lock_bh(&hci_task_lock); | |
1594 | ||
1595 | if (hci_proto[hp->id]) | |
1596 | hci_proto[hp->id] = NULL; | |
1597 | else | |
1598 | err = -ENOENT; | |
1599 | ||
1600 | write_unlock_bh(&hci_task_lock); | |
1601 | ||
1602 | return err; | |
1603 | } | |
1604 | EXPORT_SYMBOL(hci_unregister_proto); | |
1605 | ||
1606 | int hci_register_cb(struct hci_cb *cb) | |
1607 | { | |
1608 | BT_DBG("%p name %s", cb, cb->name); | |
1609 | ||
1610 | write_lock_bh(&hci_cb_list_lock); | |
1611 | list_add(&cb->list, &hci_cb_list); | |
1612 | write_unlock_bh(&hci_cb_list_lock); | |
1613 | ||
1614 | return 0; | |
1615 | } | |
1616 | EXPORT_SYMBOL(hci_register_cb); | |
1617 | ||
1618 | int hci_unregister_cb(struct hci_cb *cb) | |
1619 | { | |
1620 | BT_DBG("%p name %s", cb, cb->name); | |
1621 | ||
1622 | write_lock_bh(&hci_cb_list_lock); | |
1623 | list_del(&cb->list); | |
1624 | write_unlock_bh(&hci_cb_list_lock); | |
1625 | ||
1626 | return 0; | |
1627 | } | |
1628 | EXPORT_SYMBOL(hci_unregister_cb); | |
1629 | ||
1630 | static int hci_send_frame(struct sk_buff *skb) | |
1631 | { | |
1632 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1633 | ||
1634 | if (!hdev) { | |
1635 | kfree_skb(skb); | |
1636 | return -ENODEV; | |
1637 | } | |
1638 | ||
0d48d939 | 1639 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1640 | |
1641 | if (atomic_read(&hdev->promisc)) { | |
1642 | /* Time stamp */ | |
a61bbcf2 | 1643 | __net_timestamp(skb); |
1da177e4 | 1644 | |
eec8d2bc | 1645 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
1646 | } |
1647 | ||
1648 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1649 | skb_orphan(skb); | |
1650 | ||
1651 | return hdev->send(skb); | |
1652 | } | |
1653 | ||
1654 | /* Send HCI command */ | |
a9de9248 | 1655 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1656 | { |
1657 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1658 | struct hci_command_hdr *hdr; | |
1659 | struct sk_buff *skb; | |
1660 | ||
a9de9248 | 1661 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1662 | |
1663 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1664 | if (!skb) { | |
ef222013 | 1665 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1666 | return -ENOMEM; |
1667 | } | |
1668 | ||
1669 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1670 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1671 | hdr->plen = plen; |
1672 | ||
1673 | if (plen) | |
1674 | memcpy(skb_put(skb, plen), param, plen); | |
1675 | ||
1676 | BT_DBG("skb len %d", skb->len); | |
1677 | ||
0d48d939 | 1678 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 1679 | skb->dev = (void *) hdev; |
c78ae283 | 1680 | |
a5040efa JH |
1681 | if (test_bit(HCI_INIT, &hdev->flags)) |
1682 | hdev->init_last_cmd = opcode; | |
1683 | ||
1da177e4 | 1684 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 1685 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
1686 | |
1687 | return 0; | |
1688 | } | |
1da177e4 LT |
1689 | |
1690 | /* Get data from the previously sent command */ | |
a9de9248 | 1691 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1692 | { |
1693 | struct hci_command_hdr *hdr; | |
1694 | ||
1695 | if (!hdev->sent_cmd) | |
1696 | return NULL; | |
1697 | ||
1698 | hdr = (void *) hdev->sent_cmd->data; | |
1699 | ||
a9de9248 | 1700 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1701 | return NULL; |
1702 | ||
a9de9248 | 1703 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1704 | |
1705 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1706 | } | |
1707 | ||
1708 | /* Send ACL data */ | |
1709 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1710 | { | |
1711 | struct hci_acl_hdr *hdr; | |
1712 | int len = skb->len; | |
1713 | ||
badff6d0 ACM |
1714 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1715 | skb_reset_transport_header(skb); | |
9c70220b | 1716 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1717 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1718 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1719 | } |
1720 | ||
9a9c6a34 | 1721 | void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) |
1da177e4 LT |
1722 | { |
1723 | struct hci_dev *hdev = conn->hdev; | |
1724 | struct sk_buff *list; | |
1725 | ||
1726 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); | |
1727 | ||
1728 | skb->dev = (void *) hdev; | |
0d48d939 | 1729 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 1730 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 | 1731 | |
70f23020 AE |
1732 | list = skb_shinfo(skb)->frag_list; |
1733 | if (!list) { | |
1da177e4 LT |
1734 | /* Non fragmented */ |
1735 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1736 | ||
1737 | skb_queue_tail(&conn->data_q, skb); | |
1738 | } else { | |
1739 | /* Fragmented */ | |
1740 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1741 | ||
1742 | skb_shinfo(skb)->frag_list = NULL; | |
1743 | ||
1744 | /* Queue all fragments atomically */ | |
1745 | spin_lock_bh(&conn->data_q.lock); | |
1746 | ||
1747 | __skb_queue_tail(&conn->data_q, skb); | |
e702112f AE |
1748 | |
1749 | flags &= ~ACL_START; | |
1750 | flags |= ACL_CONT; | |
1da177e4 LT |
1751 | do { |
1752 | skb = list; list = list->next; | |
8e87d142 | 1753 | |
1da177e4 | 1754 | skb->dev = (void *) hdev; |
0d48d939 | 1755 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 1756 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 LT |
1757 | |
1758 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1759 | ||
1760 | __skb_queue_tail(&conn->data_q, skb); | |
1761 | } while (list); | |
1762 | ||
1763 | spin_unlock_bh(&conn->data_q.lock); | |
1764 | } | |
1765 | ||
c78ae283 | 1766 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
1767 | } |
1768 | EXPORT_SYMBOL(hci_send_acl); | |
1769 | ||
1770 | /* Send SCO data */ | |
0d861d8b | 1771 | void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
1772 | { |
1773 | struct hci_dev *hdev = conn->hdev; | |
1774 | struct hci_sco_hdr hdr; | |
1775 | ||
1776 | BT_DBG("%s len %d", hdev->name, skb->len); | |
1777 | ||
aca3192c | 1778 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
1779 | hdr.dlen = skb->len; |
1780 | ||
badff6d0 ACM |
1781 | skb_push(skb, HCI_SCO_HDR_SIZE); |
1782 | skb_reset_transport_header(skb); | |
9c70220b | 1783 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
1784 | |
1785 | skb->dev = (void *) hdev; | |
0d48d939 | 1786 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
c78ae283 | 1787 | |
1da177e4 | 1788 | skb_queue_tail(&conn->data_q, skb); |
c78ae283 | 1789 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
1790 | } |
1791 | EXPORT_SYMBOL(hci_send_sco); | |
1792 | ||
1793 | /* ---- HCI TX task (outgoing data) ---- */ | |
1794 | ||
1795 | /* HCI Connection scheduler */ | |
1796 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
1797 | { | |
1798 | struct hci_conn_hash *h = &hdev->conn_hash; | |
5b7f9909 | 1799 | struct hci_conn *conn = NULL; |
1da177e4 LT |
1800 | int num = 0, min = ~0; |
1801 | struct list_head *p; | |
1802 | ||
8e87d142 | 1803 | /* We don't have to lock device here. Connections are always |
1da177e4 LT |
1804 | * added and removed with TX task disabled. */ |
1805 | list_for_each(p, &h->list) { | |
1806 | struct hci_conn *c; | |
1807 | c = list_entry(p, struct hci_conn, list); | |
1808 | ||
769be974 | 1809 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 1810 | continue; |
769be974 MH |
1811 | |
1812 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
1813 | continue; | |
1814 | ||
1da177e4 LT |
1815 | num++; |
1816 | ||
1817 | if (c->sent < min) { | |
1818 | min = c->sent; | |
1819 | conn = c; | |
1820 | } | |
1821 | } | |
1822 | ||
1823 | if (conn) { | |
6ed58ec5 VT |
1824 | int cnt, q; |
1825 | ||
1826 | switch (conn->type) { | |
1827 | case ACL_LINK: | |
1828 | cnt = hdev->acl_cnt; | |
1829 | break; | |
1830 | case SCO_LINK: | |
1831 | case ESCO_LINK: | |
1832 | cnt = hdev->sco_cnt; | |
1833 | break; | |
1834 | case LE_LINK: | |
1835 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; | |
1836 | break; | |
1837 | default: | |
1838 | cnt = 0; | |
1839 | BT_ERR("Unknown link type"); | |
1840 | } | |
1841 | ||
1842 | q = cnt / num; | |
1da177e4 LT |
1843 | *quote = q ? q : 1; |
1844 | } else | |
1845 | *quote = 0; | |
1846 | ||
1847 | BT_DBG("conn %p quote %d", conn, *quote); | |
1848 | return conn; | |
1849 | } | |
1850 | ||
bae1f5d9 | 1851 | static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type) |
1da177e4 LT |
1852 | { |
1853 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1854 | struct list_head *p; | |
1855 | struct hci_conn *c; | |
1856 | ||
bae1f5d9 | 1857 | BT_ERR("%s link tx timeout", hdev->name); |
1da177e4 LT |
1858 | |
1859 | /* Kill stalled connections */ | |
1860 | list_for_each(p, &h->list) { | |
1861 | c = list_entry(p, struct hci_conn, list); | |
bae1f5d9 VT |
1862 | if (c->type == type && c->sent) { |
1863 | BT_ERR("%s killing stalled connection %s", | |
1da177e4 LT |
1864 | hdev->name, batostr(&c->dst)); |
1865 | hci_acl_disconn(c, 0x13); | |
1866 | } | |
1867 | } | |
1868 | } | |
1869 | ||
1870 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
1871 | { | |
1872 | struct hci_conn *conn; | |
1873 | struct sk_buff *skb; | |
1874 | int quote; | |
1875 | ||
1876 | BT_DBG("%s", hdev->name); | |
1877 | ||
1878 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1879 | /* ACL tx timeout must be longer than maximum | |
1880 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 1881 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
bae1f5d9 | 1882 | hci_link_tx_to(hdev, ACL_LINK); |
1da177e4 LT |
1883 | } |
1884 | ||
1885 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { | |
1886 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1887 | BT_DBG("skb %p len %d", skb, skb->len); | |
04837f64 MH |
1888 | |
1889 | hci_conn_enter_active_mode(conn); | |
1890 | ||
1da177e4 LT |
1891 | hci_send_frame(skb); |
1892 | hdev->acl_last_tx = jiffies; | |
1893 | ||
1894 | hdev->acl_cnt--; | |
1895 | conn->sent++; | |
1896 | } | |
1897 | } | |
1898 | } | |
1899 | ||
1900 | /* Schedule SCO */ | |
1901 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
1902 | { | |
1903 | struct hci_conn *conn; | |
1904 | struct sk_buff *skb; | |
1905 | int quote; | |
1906 | ||
1907 | BT_DBG("%s", hdev->name); | |
1908 | ||
1909 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { | |
1910 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1911 | BT_DBG("skb %p len %d", skb, skb->len); | |
1912 | hci_send_frame(skb); | |
1913 | ||
1914 | conn->sent++; | |
1915 | if (conn->sent == ~0) | |
1916 | conn->sent = 0; | |
1917 | } | |
1918 | } | |
1919 | } | |
1920 | ||
b6a0dc82 MH |
1921 | static inline void hci_sched_esco(struct hci_dev *hdev) |
1922 | { | |
1923 | struct hci_conn *conn; | |
1924 | struct sk_buff *skb; | |
1925 | int quote; | |
1926 | ||
1927 | BT_DBG("%s", hdev->name); | |
1928 | ||
1929 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { | |
1930 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1931 | BT_DBG("skb %p len %d", skb, skb->len); | |
1932 | hci_send_frame(skb); | |
1933 | ||
1934 | conn->sent++; | |
1935 | if (conn->sent == ~0) | |
1936 | conn->sent = 0; | |
1937 | } | |
1938 | } | |
1939 | } | |
1940 | ||
6ed58ec5 VT |
1941 | static inline void hci_sched_le(struct hci_dev *hdev) |
1942 | { | |
1943 | struct hci_conn *conn; | |
1944 | struct sk_buff *skb; | |
1945 | int quote, cnt; | |
1946 | ||
1947 | BT_DBG("%s", hdev->name); | |
1948 | ||
1949 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1950 | /* LE tx timeout must be longer than maximum | |
1951 | * link supervision timeout (40.9 seconds) */ | |
bae1f5d9 | 1952 | if (!hdev->le_cnt && hdev->le_pkts && |
6ed58ec5 | 1953 | time_after(jiffies, hdev->le_last_tx + HZ * 45)) |
bae1f5d9 | 1954 | hci_link_tx_to(hdev, LE_LINK); |
6ed58ec5 VT |
1955 | } |
1956 | ||
1957 | cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt; | |
1958 | while (cnt && (conn = hci_low_sent(hdev, LE_LINK, "e))) { | |
1959 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1960 | BT_DBG("skb %p len %d", skb, skb->len); | |
1961 | ||
1962 | hci_send_frame(skb); | |
1963 | hdev->le_last_tx = jiffies; | |
1964 | ||
1965 | cnt--; | |
1966 | conn->sent++; | |
1967 | } | |
1968 | } | |
1969 | if (hdev->le_pkts) | |
1970 | hdev->le_cnt = cnt; | |
1971 | else | |
1972 | hdev->acl_cnt = cnt; | |
1973 | } | |
1974 | ||
1da177e4 LT |
1975 | static void hci_tx_task(unsigned long arg) |
1976 | { | |
1977 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1978 | struct sk_buff *skb; | |
1979 | ||
1980 | read_lock(&hci_task_lock); | |
1981 | ||
6ed58ec5 VT |
1982 | BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt, |
1983 | hdev->sco_cnt, hdev->le_cnt); | |
1da177e4 LT |
1984 | |
1985 | /* Schedule queues and send stuff to HCI driver */ | |
1986 | ||
1987 | hci_sched_acl(hdev); | |
1988 | ||
1989 | hci_sched_sco(hdev); | |
1990 | ||
b6a0dc82 MH |
1991 | hci_sched_esco(hdev); |
1992 | ||
6ed58ec5 VT |
1993 | hci_sched_le(hdev); |
1994 | ||
1da177e4 LT |
1995 | /* Send next queued raw (unknown type) packet */ |
1996 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
1997 | hci_send_frame(skb); | |
1998 | ||
1999 | read_unlock(&hci_task_lock); | |
2000 | } | |
2001 | ||
2002 | /* ----- HCI RX task (incoming data proccessing) ----- */ | |
2003 | ||
2004 | /* ACL data packet */ | |
2005 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
2006 | { | |
2007 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
2008 | struct hci_conn *conn; | |
2009 | __u16 handle, flags; | |
2010 | ||
2011 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
2012 | ||
2013 | handle = __le16_to_cpu(hdr->handle); | |
2014 | flags = hci_flags(handle); | |
2015 | handle = hci_handle(handle); | |
2016 | ||
2017 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
2018 | ||
2019 | hdev->stat.acl_rx++; | |
2020 | ||
2021 | hci_dev_lock(hdev); | |
2022 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
2023 | hci_dev_unlock(hdev); | |
8e87d142 | 2024 | |
1da177e4 LT |
2025 | if (conn) { |
2026 | register struct hci_proto *hp; | |
2027 | ||
04837f64 MH |
2028 | hci_conn_enter_active_mode(conn); |
2029 | ||
1da177e4 | 2030 | /* Send to upper protocol */ |
70f23020 AE |
2031 | hp = hci_proto[HCI_PROTO_L2CAP]; |
2032 | if (hp && hp->recv_acldata) { | |
1da177e4 LT |
2033 | hp->recv_acldata(conn, skb, flags); |
2034 | return; | |
2035 | } | |
2036 | } else { | |
8e87d142 | 2037 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
2038 | hdev->name, handle); |
2039 | } | |
2040 | ||
2041 | kfree_skb(skb); | |
2042 | } | |
2043 | ||
2044 | /* SCO data packet */ | |
2045 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
2046 | { | |
2047 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
2048 | struct hci_conn *conn; | |
2049 | __u16 handle; | |
2050 | ||
2051 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
2052 | ||
2053 | handle = __le16_to_cpu(hdr->handle); | |
2054 | ||
2055 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
2056 | ||
2057 | hdev->stat.sco_rx++; | |
2058 | ||
2059 | hci_dev_lock(hdev); | |
2060 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
2061 | hci_dev_unlock(hdev); | |
2062 | ||
2063 | if (conn) { | |
2064 | register struct hci_proto *hp; | |
2065 | ||
2066 | /* Send to upper protocol */ | |
70f23020 AE |
2067 | hp = hci_proto[HCI_PROTO_SCO]; |
2068 | if (hp && hp->recv_scodata) { | |
1da177e4 LT |
2069 | hp->recv_scodata(conn, skb); |
2070 | return; | |
2071 | } | |
2072 | } else { | |
8e87d142 | 2073 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
2074 | hdev->name, handle); |
2075 | } | |
2076 | ||
2077 | kfree_skb(skb); | |
2078 | } | |
2079 | ||
6516455d | 2080 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
2081 | { |
2082 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2083 | struct sk_buff *skb; | |
2084 | ||
2085 | BT_DBG("%s", hdev->name); | |
2086 | ||
2087 | read_lock(&hci_task_lock); | |
2088 | ||
2089 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
2090 | if (atomic_read(&hdev->promisc)) { | |
2091 | /* Send copy to the sockets */ | |
eec8d2bc | 2092 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
2093 | } |
2094 | ||
2095 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
2096 | kfree_skb(skb); | |
2097 | continue; | |
2098 | } | |
2099 | ||
2100 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
2101 | /* Don't process data packets in this states. */ | |
0d48d939 | 2102 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
2103 | case HCI_ACLDATA_PKT: |
2104 | case HCI_SCODATA_PKT: | |
2105 | kfree_skb(skb); | |
2106 | continue; | |
3ff50b79 | 2107 | } |
1da177e4 LT |
2108 | } |
2109 | ||
2110 | /* Process frame */ | |
0d48d939 | 2111 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
2112 | case HCI_EVENT_PKT: |
2113 | hci_event_packet(hdev, skb); | |
2114 | break; | |
2115 | ||
2116 | case HCI_ACLDATA_PKT: | |
2117 | BT_DBG("%s ACL data packet", hdev->name); | |
2118 | hci_acldata_packet(hdev, skb); | |
2119 | break; | |
2120 | ||
2121 | case HCI_SCODATA_PKT: | |
2122 | BT_DBG("%s SCO data packet", hdev->name); | |
2123 | hci_scodata_packet(hdev, skb); | |
2124 | break; | |
2125 | ||
2126 | default: | |
2127 | kfree_skb(skb); | |
2128 | break; | |
2129 | } | |
2130 | } | |
2131 | ||
2132 | read_unlock(&hci_task_lock); | |
2133 | } | |
2134 | ||
2135 | static void hci_cmd_task(unsigned long arg) | |
2136 | { | |
2137 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2138 | struct sk_buff *skb; | |
2139 | ||
2140 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
2141 | ||
1da177e4 | 2142 | /* Send queued commands */ |
5a08ecce AE |
2143 | if (atomic_read(&hdev->cmd_cnt)) { |
2144 | skb = skb_dequeue(&hdev->cmd_q); | |
2145 | if (!skb) | |
2146 | return; | |
2147 | ||
7585b97a | 2148 | kfree_skb(hdev->sent_cmd); |
1da177e4 | 2149 | |
70f23020 AE |
2150 | hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC); |
2151 | if (hdev->sent_cmd) { | |
1da177e4 LT |
2152 | atomic_dec(&hdev->cmd_cnt); |
2153 | hci_send_frame(skb); | |
6bd32326 VT |
2154 | mod_timer(&hdev->cmd_timer, |
2155 | jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT)); | |
1da177e4 LT |
2156 | } else { |
2157 | skb_queue_head(&hdev->cmd_q, skb); | |
c78ae283 | 2158 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
2159 | } |
2160 | } | |
2161 | } |