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 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | #include <linux/kmod.h> | |
29 | ||
30 | #include <linux/types.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/kernel.h> | |
1da177e4 LT |
33 | #include <linux/sched.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/skbuff.h> | |
39 | #include <linux/interrupt.h> | |
40 | #include <linux/notifier.h> | |
41 | #include <net/sock.h> | |
42 | ||
43 | #include <asm/system.h> | |
44 | #include <asm/uaccess.h> | |
45 | #include <asm/unaligned.h> | |
46 | ||
47 | #include <net/bluetooth/bluetooth.h> | |
48 | #include <net/bluetooth/hci_core.h> | |
49 | ||
50 | #ifndef CONFIG_BT_HCI_CORE_DEBUG | |
51 | #undef BT_DBG | |
52 | #define BT_DBG(D...) | |
53 | #endif | |
54 | ||
55 | static void hci_cmd_task(unsigned long arg); | |
56 | static void hci_rx_task(unsigned long arg); | |
57 | static void hci_tx_task(unsigned long arg); | |
58 | static void hci_notify(struct hci_dev *hdev, int event); | |
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 | ||
96 | void hci_req_complete(struct hci_dev *hdev, int result) | |
97 | { | |
98 | BT_DBG("%s result 0x%2.2x", hdev->name, result); | |
99 | ||
100 | if (hdev->req_status == HCI_REQ_PEND) { | |
101 | hdev->req_result = result; | |
102 | hdev->req_status = HCI_REQ_DONE; | |
103 | wake_up_interruptible(&hdev->req_wait_q); | |
104 | } | |
105 | } | |
106 | ||
107 | static void hci_req_cancel(struct hci_dev *hdev, int err) | |
108 | { | |
109 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
110 | ||
111 | if (hdev->req_status == HCI_REQ_PEND) { | |
112 | hdev->req_result = err; | |
113 | hdev->req_status = HCI_REQ_CANCELED; | |
114 | wake_up_interruptible(&hdev->req_wait_q); | |
115 | } | |
116 | } | |
117 | ||
118 | /* Execute request and wait for completion. */ | |
8e87d142 | 119 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
1da177e4 LT |
120 | unsigned long opt, __u32 timeout) |
121 | { | |
122 | DECLARE_WAITQUEUE(wait, current); | |
123 | int err = 0; | |
124 | ||
125 | BT_DBG("%s start", hdev->name); | |
126 | ||
127 | hdev->req_status = HCI_REQ_PEND; | |
128 | ||
129 | add_wait_queue(&hdev->req_wait_q, &wait); | |
130 | set_current_state(TASK_INTERRUPTIBLE); | |
131 | ||
132 | req(hdev, opt); | |
133 | schedule_timeout(timeout); | |
134 | ||
135 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
136 | ||
137 | if (signal_pending(current)) | |
138 | return -EINTR; | |
139 | ||
140 | switch (hdev->req_status) { | |
141 | case HCI_REQ_DONE: | |
142 | err = -bt_err(hdev->req_result); | |
143 | break; | |
144 | ||
145 | case HCI_REQ_CANCELED: | |
146 | err = -hdev->req_result; | |
147 | break; | |
148 | ||
149 | default: | |
150 | err = -ETIMEDOUT; | |
151 | break; | |
152 | }; | |
153 | ||
154 | hdev->req_status = hdev->req_result = 0; | |
155 | ||
156 | BT_DBG("%s end: err %d", hdev->name, err); | |
157 | ||
158 | return err; | |
159 | } | |
160 | ||
161 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), | |
162 | unsigned long opt, __u32 timeout) | |
163 | { | |
164 | int ret; | |
165 | ||
166 | /* Serialize all requests */ | |
167 | hci_req_lock(hdev); | |
168 | ret = __hci_request(hdev, req, opt, timeout); | |
169 | hci_req_unlock(hdev); | |
170 | ||
171 | return ret; | |
172 | } | |
173 | ||
174 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) | |
175 | { | |
176 | BT_DBG("%s %ld", hdev->name, opt); | |
177 | ||
178 | /* Reset device */ | |
179 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_RESET, 0, NULL); | |
180 | } | |
181 | ||
182 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) | |
183 | { | |
184 | struct sk_buff *skb; | |
1ebb9252 | 185 | __le16 param; |
1da177e4 LT |
186 | |
187 | BT_DBG("%s %ld", hdev->name, opt); | |
188 | ||
189 | /* Driver initialization */ | |
190 | ||
191 | /* Special commands */ | |
192 | while ((skb = skb_dequeue(&hdev->driver_init))) { | |
0d48d939 | 193 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 LT |
194 | skb->dev = (void *) hdev; |
195 | skb_queue_tail(&hdev->cmd_q, skb); | |
196 | hci_sched_cmd(hdev); | |
197 | } | |
198 | skb_queue_purge(&hdev->driver_init); | |
199 | ||
200 | /* Mandatory initialization */ | |
201 | ||
202 | /* Reset */ | |
203 | if (test_bit(HCI_QUIRK_RESET_ON_INIT, &hdev->quirks)) | |
204 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_RESET, 0, NULL); | |
205 | ||
206 | /* Read Local Supported Features */ | |
207 | hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_LOCAL_FEATURES, 0, NULL); | |
208 | ||
1143e5a6 MH |
209 | /* Read Local Version */ |
210 | hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_LOCAL_VERSION, 0, NULL); | |
211 | ||
1da177e4 LT |
212 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
213 | hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_BUFFER_SIZE, 0, NULL); | |
214 | ||
215 | #if 0 | |
216 | /* Host buffer size */ | |
217 | { | |
218 | struct hci_cp_host_buffer_size cp; | |
aca3192c | 219 | cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE); |
1da177e4 | 220 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
aca3192c YH |
221 | cp.acl_max_pkt = cpu_to_le16(0xffff); |
222 | cp.sco_max_pkt = cpu_to_le16(0xffff); | |
1da177e4 LT |
223 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
224 | } | |
225 | #endif | |
226 | ||
227 | /* Read BD Address */ | |
228 | hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_BD_ADDR, 0, NULL); | |
229 | ||
230 | /* Read Voice Setting */ | |
231 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_READ_VOICE_SETTING, 0, NULL); | |
232 | ||
233 | /* Optional initialization */ | |
234 | ||
235 | /* Clear Event Filters */ | |
236 | { | |
237 | struct hci_cp_set_event_flt cp; | |
238 | cp.flt_type = HCI_FLT_CLEAR_ALL; | |
239 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_SET_EVENT_FLT, sizeof(cp), &cp); | |
240 | } | |
241 | ||
242 | /* Page timeout ~20 secs */ | |
aca3192c | 243 | param = cpu_to_le16(0x8000); |
1da177e4 LT |
244 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_PG_TIMEOUT, 2, ¶m); |
245 | ||
246 | /* Connection accept timeout ~20 secs */ | |
aca3192c | 247 | param = cpu_to_le16(0x7d00); |
1da177e4 LT |
248 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_CA_TIMEOUT, 2, ¶m); |
249 | } | |
250 | ||
251 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) | |
252 | { | |
253 | __u8 scan = opt; | |
254 | ||
255 | BT_DBG("%s %x", hdev->name, scan); | |
256 | ||
257 | /* Inquiry and Page scans */ | |
258 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_SCAN_ENABLE, 1, &scan); | |
259 | } | |
260 | ||
261 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
262 | { | |
263 | __u8 auth = opt; | |
264 | ||
265 | BT_DBG("%s %x", hdev->name, auth); | |
266 | ||
267 | /* Authentication */ | |
268 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_AUTH_ENABLE, 1, &auth); | |
269 | } | |
270 | ||
271 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
272 | { | |
273 | __u8 encrypt = opt; | |
274 | ||
275 | BT_DBG("%s %x", hdev->name, encrypt); | |
276 | ||
277 | /* Authentication */ | |
278 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_ENCRYPT_MODE, 1, &encrypt); | |
279 | } | |
280 | ||
8e87d142 | 281 | /* Get HCI device by index. |
1da177e4 LT |
282 | * Device is held on return. */ |
283 | struct hci_dev *hci_dev_get(int index) | |
284 | { | |
285 | struct hci_dev *hdev = NULL; | |
286 | struct list_head *p; | |
287 | ||
288 | BT_DBG("%d", index); | |
289 | ||
290 | if (index < 0) | |
291 | return NULL; | |
292 | ||
293 | read_lock(&hci_dev_list_lock); | |
294 | list_for_each(p, &hci_dev_list) { | |
295 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
296 | if (d->id == index) { | |
297 | hdev = hci_dev_hold(d); | |
298 | break; | |
299 | } | |
300 | } | |
301 | read_unlock(&hci_dev_list_lock); | |
302 | return hdev; | |
303 | } | |
1da177e4 LT |
304 | |
305 | /* ---- Inquiry support ---- */ | |
306 | static void inquiry_cache_flush(struct hci_dev *hdev) | |
307 | { | |
308 | struct inquiry_cache *cache = &hdev->inq_cache; | |
309 | struct inquiry_entry *next = cache->list, *e; | |
310 | ||
311 | BT_DBG("cache %p", cache); | |
312 | ||
313 | cache->list = NULL; | |
314 | while ((e = next)) { | |
315 | next = e->next; | |
316 | kfree(e); | |
317 | } | |
318 | } | |
319 | ||
320 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
321 | { | |
322 | struct inquiry_cache *cache = &hdev->inq_cache; | |
323 | struct inquiry_entry *e; | |
324 | ||
325 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
326 | ||
327 | for (e = cache->list; e; e = e->next) | |
328 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
329 | break; | |
330 | return e; | |
331 | } | |
332 | ||
333 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) | |
334 | { | |
335 | struct inquiry_cache *cache = &hdev->inq_cache; | |
336 | struct inquiry_entry *e; | |
337 | ||
338 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
339 | ||
340 | if (!(e = hci_inquiry_cache_lookup(hdev, &data->bdaddr))) { | |
341 | /* Entry not in the cache. Add new one. */ | |
25ea6db0 | 342 | if (!(e = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC))) |
1da177e4 | 343 | return; |
1da177e4 LT |
344 | e->next = cache->list; |
345 | cache->list = e; | |
346 | } | |
347 | ||
348 | memcpy(&e->data, data, sizeof(*data)); | |
349 | e->timestamp = jiffies; | |
350 | cache->timestamp = jiffies; | |
351 | } | |
352 | ||
353 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
354 | { | |
355 | struct inquiry_cache *cache = &hdev->inq_cache; | |
356 | struct inquiry_info *info = (struct inquiry_info *) buf; | |
357 | struct inquiry_entry *e; | |
358 | int copied = 0; | |
359 | ||
360 | for (e = cache->list; e && copied < num; e = e->next, copied++) { | |
361 | struct inquiry_data *data = &e->data; | |
362 | bacpy(&info->bdaddr, &data->bdaddr); | |
363 | info->pscan_rep_mode = data->pscan_rep_mode; | |
364 | info->pscan_period_mode = data->pscan_period_mode; | |
365 | info->pscan_mode = data->pscan_mode; | |
366 | memcpy(info->dev_class, data->dev_class, 3); | |
367 | info->clock_offset = data->clock_offset; | |
368 | info++; | |
369 | } | |
370 | ||
371 | BT_DBG("cache %p, copied %d", cache, copied); | |
372 | return copied; | |
373 | } | |
374 | ||
375 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
376 | { | |
377 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
378 | struct hci_cp_inquiry cp; | |
379 | ||
380 | BT_DBG("%s", hdev->name); | |
381 | ||
382 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
383 | return; | |
384 | ||
385 | /* Start Inquiry */ | |
386 | memcpy(&cp.lap, &ir->lap, 3); | |
387 | cp.length = ir->length; | |
388 | cp.num_rsp = ir->num_rsp; | |
389 | hci_send_cmd(hdev, OGF_LINK_CTL, OCF_INQUIRY, sizeof(cp), &cp); | |
390 | } | |
391 | ||
392 | int hci_inquiry(void __user *arg) | |
393 | { | |
394 | __u8 __user *ptr = arg; | |
395 | struct hci_inquiry_req ir; | |
396 | struct hci_dev *hdev; | |
397 | int err = 0, do_inquiry = 0, max_rsp; | |
398 | long timeo; | |
399 | __u8 *buf; | |
400 | ||
401 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
402 | return -EFAULT; | |
403 | ||
404 | if (!(hdev = hci_dev_get(ir.dev_id))) | |
405 | return -ENODEV; | |
406 | ||
407 | hci_dev_lock_bh(hdev); | |
8e87d142 | 408 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
1da177e4 LT |
409 | inquiry_cache_empty(hdev) || |
410 | ir.flags & IREQ_CACHE_FLUSH) { | |
411 | inquiry_cache_flush(hdev); | |
412 | do_inquiry = 1; | |
413 | } | |
414 | hci_dev_unlock_bh(hdev); | |
415 | ||
04837f64 | 416 | timeo = ir.length * msecs_to_jiffies(2000); |
1da177e4 LT |
417 | if (do_inquiry && (err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo)) < 0) |
418 | goto done; | |
419 | ||
420 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
421 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
422 | ||
423 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
424 | * copy it to the user space. | |
425 | */ | |
426 | if (!(buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL))) { | |
427 | err = -ENOMEM; | |
428 | goto done; | |
429 | } | |
430 | ||
431 | hci_dev_lock_bh(hdev); | |
432 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); | |
433 | hci_dev_unlock_bh(hdev); | |
434 | ||
435 | BT_DBG("num_rsp %d", ir.num_rsp); | |
436 | ||
437 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
438 | ptr += sizeof(ir); | |
439 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
440 | ir.num_rsp)) | |
441 | err = -EFAULT; | |
8e87d142 | 442 | } else |
1da177e4 LT |
443 | err = -EFAULT; |
444 | ||
445 | kfree(buf); | |
446 | ||
447 | done: | |
448 | hci_dev_put(hdev); | |
449 | return err; | |
450 | } | |
451 | ||
452 | /* ---- HCI ioctl helpers ---- */ | |
453 | ||
454 | int hci_dev_open(__u16 dev) | |
455 | { | |
456 | struct hci_dev *hdev; | |
457 | int ret = 0; | |
458 | ||
459 | if (!(hdev = hci_dev_get(dev))) | |
460 | return -ENODEV; | |
461 | ||
462 | BT_DBG("%s %p", hdev->name, hdev); | |
463 | ||
464 | hci_req_lock(hdev); | |
465 | ||
466 | if (test_bit(HCI_UP, &hdev->flags)) { | |
467 | ret = -EALREADY; | |
468 | goto done; | |
469 | } | |
470 | ||
471 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
472 | set_bit(HCI_RAW, &hdev->flags); | |
473 | ||
474 | if (hdev->open(hdev)) { | |
475 | ret = -EIO; | |
476 | goto done; | |
477 | } | |
478 | ||
479 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
480 | atomic_set(&hdev->cmd_cnt, 1); | |
481 | set_bit(HCI_INIT, &hdev->flags); | |
482 | ||
483 | //__hci_request(hdev, hci_reset_req, 0, HZ); | |
04837f64 MH |
484 | ret = __hci_request(hdev, hci_init_req, 0, |
485 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
486 | |
487 | clear_bit(HCI_INIT, &hdev->flags); | |
488 | } | |
489 | ||
490 | if (!ret) { | |
491 | hci_dev_hold(hdev); | |
492 | set_bit(HCI_UP, &hdev->flags); | |
493 | hci_notify(hdev, HCI_DEV_UP); | |
8e87d142 | 494 | } else { |
1da177e4 LT |
495 | /* Init failed, cleanup */ |
496 | tasklet_kill(&hdev->rx_task); | |
497 | tasklet_kill(&hdev->tx_task); | |
498 | tasklet_kill(&hdev->cmd_task); | |
499 | ||
500 | skb_queue_purge(&hdev->cmd_q); | |
501 | skb_queue_purge(&hdev->rx_q); | |
502 | ||
503 | if (hdev->flush) | |
504 | hdev->flush(hdev); | |
505 | ||
506 | if (hdev->sent_cmd) { | |
507 | kfree_skb(hdev->sent_cmd); | |
508 | hdev->sent_cmd = NULL; | |
509 | } | |
510 | ||
511 | hdev->close(hdev); | |
512 | hdev->flags = 0; | |
513 | } | |
514 | ||
515 | done: | |
516 | hci_req_unlock(hdev); | |
517 | hci_dev_put(hdev); | |
518 | return ret; | |
519 | } | |
520 | ||
521 | static int hci_dev_do_close(struct hci_dev *hdev) | |
522 | { | |
523 | BT_DBG("%s %p", hdev->name, hdev); | |
524 | ||
525 | hci_req_cancel(hdev, ENODEV); | |
526 | hci_req_lock(hdev); | |
527 | ||
528 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
529 | hci_req_unlock(hdev); | |
530 | return 0; | |
531 | } | |
532 | ||
533 | /* Kill RX and TX tasks */ | |
534 | tasklet_kill(&hdev->rx_task); | |
535 | tasklet_kill(&hdev->tx_task); | |
536 | ||
537 | hci_dev_lock_bh(hdev); | |
538 | inquiry_cache_flush(hdev); | |
539 | hci_conn_hash_flush(hdev); | |
540 | hci_dev_unlock_bh(hdev); | |
541 | ||
542 | hci_notify(hdev, HCI_DEV_DOWN); | |
543 | ||
544 | if (hdev->flush) | |
545 | hdev->flush(hdev); | |
546 | ||
547 | /* Reset device */ | |
548 | skb_queue_purge(&hdev->cmd_q); | |
549 | atomic_set(&hdev->cmd_cnt, 1); | |
550 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
551 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 MH |
552 | __hci_request(hdev, hci_reset_req, 0, |
553 | msecs_to_jiffies(250)); | |
1da177e4 LT |
554 | clear_bit(HCI_INIT, &hdev->flags); |
555 | } | |
556 | ||
557 | /* Kill cmd task */ | |
558 | tasklet_kill(&hdev->cmd_task); | |
559 | ||
560 | /* Drop queues */ | |
561 | skb_queue_purge(&hdev->rx_q); | |
562 | skb_queue_purge(&hdev->cmd_q); | |
563 | skb_queue_purge(&hdev->raw_q); | |
564 | ||
565 | /* Drop last sent command */ | |
566 | if (hdev->sent_cmd) { | |
567 | kfree_skb(hdev->sent_cmd); | |
568 | hdev->sent_cmd = NULL; | |
569 | } | |
570 | ||
571 | /* After this point our queues are empty | |
572 | * and no tasks are scheduled. */ | |
573 | hdev->close(hdev); | |
574 | ||
575 | /* Clear flags */ | |
576 | hdev->flags = 0; | |
577 | ||
578 | hci_req_unlock(hdev); | |
579 | ||
580 | hci_dev_put(hdev); | |
581 | return 0; | |
582 | } | |
583 | ||
584 | int hci_dev_close(__u16 dev) | |
585 | { | |
586 | struct hci_dev *hdev; | |
587 | int err; | |
588 | ||
589 | if (!(hdev = hci_dev_get(dev))) | |
590 | return -ENODEV; | |
591 | err = hci_dev_do_close(hdev); | |
592 | hci_dev_put(hdev); | |
593 | return err; | |
594 | } | |
595 | ||
596 | int hci_dev_reset(__u16 dev) | |
597 | { | |
598 | struct hci_dev *hdev; | |
599 | int ret = 0; | |
600 | ||
601 | if (!(hdev = hci_dev_get(dev))) | |
602 | return -ENODEV; | |
603 | ||
604 | hci_req_lock(hdev); | |
605 | tasklet_disable(&hdev->tx_task); | |
606 | ||
607 | if (!test_bit(HCI_UP, &hdev->flags)) | |
608 | goto done; | |
609 | ||
610 | /* Drop queues */ | |
611 | skb_queue_purge(&hdev->rx_q); | |
612 | skb_queue_purge(&hdev->cmd_q); | |
613 | ||
614 | hci_dev_lock_bh(hdev); | |
615 | inquiry_cache_flush(hdev); | |
616 | hci_conn_hash_flush(hdev); | |
617 | hci_dev_unlock_bh(hdev); | |
618 | ||
619 | if (hdev->flush) | |
620 | hdev->flush(hdev); | |
621 | ||
8e87d142 | 622 | atomic_set(&hdev->cmd_cnt, 1); |
1da177e4 LT |
623 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; |
624 | ||
625 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
626 | ret = __hci_request(hdev, hci_reset_req, 0, |
627 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
628 | |
629 | done: | |
630 | tasklet_enable(&hdev->tx_task); | |
631 | hci_req_unlock(hdev); | |
632 | hci_dev_put(hdev); | |
633 | return ret; | |
634 | } | |
635 | ||
636 | int hci_dev_reset_stat(__u16 dev) | |
637 | { | |
638 | struct hci_dev *hdev; | |
639 | int ret = 0; | |
640 | ||
641 | if (!(hdev = hci_dev_get(dev))) | |
642 | return -ENODEV; | |
643 | ||
644 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
645 | ||
646 | hci_dev_put(hdev); | |
647 | ||
648 | return ret; | |
649 | } | |
650 | ||
651 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
652 | { | |
653 | struct hci_dev *hdev; | |
654 | struct hci_dev_req dr; | |
655 | int err = 0; | |
656 | ||
657 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
658 | return -EFAULT; | |
659 | ||
660 | if (!(hdev = hci_dev_get(dr.dev_id))) | |
661 | return -ENODEV; | |
662 | ||
663 | switch (cmd) { | |
664 | case HCISETAUTH: | |
04837f64 MH |
665 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
666 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
667 | break; |
668 | ||
669 | case HCISETENCRYPT: | |
670 | if (!lmp_encrypt_capable(hdev)) { | |
671 | err = -EOPNOTSUPP; | |
672 | break; | |
673 | } | |
674 | ||
675 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
676 | /* Auth must be enabled first */ | |
04837f64 MH |
677 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
678 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
679 | if (err) |
680 | break; | |
681 | } | |
682 | ||
04837f64 MH |
683 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
684 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
685 | break; |
686 | ||
687 | case HCISETSCAN: | |
04837f64 MH |
688 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
689 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
690 | break; |
691 | ||
692 | case HCISETPTYPE: | |
693 | hdev->pkt_type = (__u16) dr.dev_opt; | |
694 | break; | |
695 | ||
696 | case HCISETLINKPOL: | |
697 | hdev->link_policy = (__u16) dr.dev_opt; | |
698 | break; | |
699 | ||
700 | case HCISETLINKMODE: | |
701 | hdev->link_mode = ((__u16) dr.dev_opt) & (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
702 | break; | |
703 | ||
704 | case HCISETACLMTU: | |
705 | hdev->acl_mtu = *((__u16 *)&dr.dev_opt + 1); | |
706 | hdev->acl_pkts = *((__u16 *)&dr.dev_opt + 0); | |
707 | break; | |
708 | ||
709 | case HCISETSCOMTU: | |
710 | hdev->sco_mtu = *((__u16 *)&dr.dev_opt + 1); | |
711 | hdev->sco_pkts = *((__u16 *)&dr.dev_opt + 0); | |
712 | break; | |
713 | ||
714 | default: | |
715 | err = -EINVAL; | |
716 | break; | |
717 | } | |
718 | hci_dev_put(hdev); | |
719 | return err; | |
720 | } | |
721 | ||
722 | int hci_get_dev_list(void __user *arg) | |
723 | { | |
724 | struct hci_dev_list_req *dl; | |
725 | struct hci_dev_req *dr; | |
726 | struct list_head *p; | |
727 | int n = 0, size, err; | |
728 | __u16 dev_num; | |
729 | ||
730 | if (get_user(dev_num, (__u16 __user *) arg)) | |
731 | return -EFAULT; | |
732 | ||
733 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
734 | return -EINVAL; | |
735 | ||
736 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
737 | ||
738 | if (!(dl = kmalloc(size, GFP_KERNEL))) | |
739 | return -ENOMEM; | |
740 | ||
741 | dr = dl->dev_req; | |
742 | ||
743 | read_lock_bh(&hci_dev_list_lock); | |
744 | list_for_each(p, &hci_dev_list) { | |
745 | struct hci_dev *hdev; | |
746 | hdev = list_entry(p, struct hci_dev, list); | |
747 | (dr + n)->dev_id = hdev->id; | |
748 | (dr + n)->dev_opt = hdev->flags; | |
749 | if (++n >= dev_num) | |
750 | break; | |
751 | } | |
752 | read_unlock_bh(&hci_dev_list_lock); | |
753 | ||
754 | dl->dev_num = n; | |
755 | size = sizeof(*dl) + n * sizeof(*dr); | |
756 | ||
757 | err = copy_to_user(arg, dl, size); | |
758 | kfree(dl); | |
759 | ||
760 | return err ? -EFAULT : 0; | |
761 | } | |
762 | ||
763 | int hci_get_dev_info(void __user *arg) | |
764 | { | |
765 | struct hci_dev *hdev; | |
766 | struct hci_dev_info di; | |
767 | int err = 0; | |
768 | ||
769 | if (copy_from_user(&di, arg, sizeof(di))) | |
770 | return -EFAULT; | |
771 | ||
772 | if (!(hdev = hci_dev_get(di.dev_id))) | |
773 | return -ENODEV; | |
774 | ||
775 | strcpy(di.name, hdev->name); | |
776 | di.bdaddr = hdev->bdaddr; | |
777 | di.type = hdev->type; | |
778 | di.flags = hdev->flags; | |
779 | di.pkt_type = hdev->pkt_type; | |
780 | di.acl_mtu = hdev->acl_mtu; | |
781 | di.acl_pkts = hdev->acl_pkts; | |
782 | di.sco_mtu = hdev->sco_mtu; | |
783 | di.sco_pkts = hdev->sco_pkts; | |
784 | di.link_policy = hdev->link_policy; | |
785 | di.link_mode = hdev->link_mode; | |
786 | ||
787 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
788 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
789 | ||
790 | if (copy_to_user(arg, &di, sizeof(di))) | |
791 | err = -EFAULT; | |
792 | ||
793 | hci_dev_put(hdev); | |
794 | ||
795 | return err; | |
796 | } | |
797 | ||
798 | /* ---- Interface to HCI drivers ---- */ | |
799 | ||
800 | /* Alloc HCI device */ | |
801 | struct hci_dev *hci_alloc_dev(void) | |
802 | { | |
803 | struct hci_dev *hdev; | |
804 | ||
25ea6db0 | 805 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
806 | if (!hdev) |
807 | return NULL; | |
808 | ||
1da177e4 LT |
809 | skb_queue_head_init(&hdev->driver_init); |
810 | ||
811 | return hdev; | |
812 | } | |
813 | EXPORT_SYMBOL(hci_alloc_dev); | |
814 | ||
815 | /* Free HCI device */ | |
816 | void hci_free_dev(struct hci_dev *hdev) | |
817 | { | |
818 | skb_queue_purge(&hdev->driver_init); | |
819 | ||
a91f2e39 MH |
820 | /* will free via device release */ |
821 | put_device(&hdev->dev); | |
1da177e4 LT |
822 | } |
823 | EXPORT_SYMBOL(hci_free_dev); | |
824 | ||
825 | /* Register HCI device */ | |
826 | int hci_register_dev(struct hci_dev *hdev) | |
827 | { | |
828 | struct list_head *head = &hci_dev_list, *p; | |
829 | int id = 0; | |
830 | ||
831 | BT_DBG("%p name %s type %d owner %p", hdev, hdev->name, hdev->type, hdev->owner); | |
832 | ||
833 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
834 | return -EINVAL; | |
835 | ||
836 | write_lock_bh(&hci_dev_list_lock); | |
837 | ||
838 | /* Find first available device id */ | |
839 | list_for_each(p, &hci_dev_list) { | |
840 | if (list_entry(p, struct hci_dev, list)->id != id) | |
841 | break; | |
842 | head = p; id++; | |
843 | } | |
8e87d142 | 844 | |
1da177e4 LT |
845 | sprintf(hdev->name, "hci%d", id); |
846 | hdev->id = id; | |
847 | list_add(&hdev->list, head); | |
848 | ||
849 | atomic_set(&hdev->refcnt, 1); | |
850 | spin_lock_init(&hdev->lock); | |
851 | ||
852 | hdev->flags = 0; | |
853 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
854 | hdev->link_mode = (HCI_LM_ACCEPT); | |
855 | ||
04837f64 MH |
856 | hdev->idle_timeout = 0; |
857 | hdev->sniff_max_interval = 800; | |
858 | hdev->sniff_min_interval = 80; | |
859 | ||
1da177e4 LT |
860 | tasklet_init(&hdev->cmd_task, hci_cmd_task,(unsigned long) hdev); |
861 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); | |
862 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
863 | ||
864 | skb_queue_head_init(&hdev->rx_q); | |
865 | skb_queue_head_init(&hdev->cmd_q); | |
866 | skb_queue_head_init(&hdev->raw_q); | |
867 | ||
868 | init_waitqueue_head(&hdev->req_wait_q); | |
869 | init_MUTEX(&hdev->req_lock); | |
870 | ||
871 | inquiry_cache_init(hdev); | |
872 | ||
873 | hci_conn_hash_init(hdev); | |
874 | ||
875 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
876 | ||
877 | atomic_set(&hdev->promisc, 0); | |
878 | ||
879 | write_unlock_bh(&hci_dev_list_lock); | |
880 | ||
881 | hci_register_sysfs(hdev); | |
882 | ||
883 | hci_notify(hdev, HCI_DEV_REG); | |
884 | ||
885 | return id; | |
886 | } | |
887 | EXPORT_SYMBOL(hci_register_dev); | |
888 | ||
889 | /* Unregister HCI device */ | |
890 | int hci_unregister_dev(struct hci_dev *hdev) | |
891 | { | |
892 | BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); | |
893 | ||
894 | hci_unregister_sysfs(hdev); | |
895 | ||
896 | write_lock_bh(&hci_dev_list_lock); | |
897 | list_del(&hdev->list); | |
898 | write_unlock_bh(&hci_dev_list_lock); | |
899 | ||
900 | hci_dev_do_close(hdev); | |
901 | ||
902 | hci_notify(hdev, HCI_DEV_UNREG); | |
903 | ||
904 | __hci_dev_put(hdev); | |
905 | return 0; | |
906 | } | |
907 | EXPORT_SYMBOL(hci_unregister_dev); | |
908 | ||
909 | /* Suspend HCI device */ | |
910 | int hci_suspend_dev(struct hci_dev *hdev) | |
911 | { | |
912 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
913 | return 0; | |
914 | } | |
915 | EXPORT_SYMBOL(hci_suspend_dev); | |
916 | ||
917 | /* Resume HCI device */ | |
918 | int hci_resume_dev(struct hci_dev *hdev) | |
919 | { | |
920 | hci_notify(hdev, HCI_DEV_RESUME); | |
921 | return 0; | |
922 | } | |
923 | EXPORT_SYMBOL(hci_resume_dev); | |
924 | ||
925 | /* ---- Interface to upper protocols ---- */ | |
926 | ||
927 | /* Register/Unregister protocols. | |
928 | * hci_task_lock is used to ensure that no tasks are running. */ | |
929 | int hci_register_proto(struct hci_proto *hp) | |
930 | { | |
931 | int err = 0; | |
932 | ||
933 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
934 | ||
935 | if (hp->id >= HCI_MAX_PROTO) | |
936 | return -EINVAL; | |
937 | ||
938 | write_lock_bh(&hci_task_lock); | |
939 | ||
940 | if (!hci_proto[hp->id]) | |
941 | hci_proto[hp->id] = hp; | |
942 | else | |
943 | err = -EEXIST; | |
944 | ||
945 | write_unlock_bh(&hci_task_lock); | |
946 | ||
947 | return err; | |
948 | } | |
949 | EXPORT_SYMBOL(hci_register_proto); | |
950 | ||
951 | int hci_unregister_proto(struct hci_proto *hp) | |
952 | { | |
953 | int err = 0; | |
954 | ||
955 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
956 | ||
957 | if (hp->id >= HCI_MAX_PROTO) | |
958 | return -EINVAL; | |
959 | ||
960 | write_lock_bh(&hci_task_lock); | |
961 | ||
962 | if (hci_proto[hp->id]) | |
963 | hci_proto[hp->id] = NULL; | |
964 | else | |
965 | err = -ENOENT; | |
966 | ||
967 | write_unlock_bh(&hci_task_lock); | |
968 | ||
969 | return err; | |
970 | } | |
971 | EXPORT_SYMBOL(hci_unregister_proto); | |
972 | ||
973 | int hci_register_cb(struct hci_cb *cb) | |
974 | { | |
975 | BT_DBG("%p name %s", cb, cb->name); | |
976 | ||
977 | write_lock_bh(&hci_cb_list_lock); | |
978 | list_add(&cb->list, &hci_cb_list); | |
979 | write_unlock_bh(&hci_cb_list_lock); | |
980 | ||
981 | return 0; | |
982 | } | |
983 | EXPORT_SYMBOL(hci_register_cb); | |
984 | ||
985 | int hci_unregister_cb(struct hci_cb *cb) | |
986 | { | |
987 | BT_DBG("%p name %s", cb, cb->name); | |
988 | ||
989 | write_lock_bh(&hci_cb_list_lock); | |
990 | list_del(&cb->list); | |
991 | write_unlock_bh(&hci_cb_list_lock); | |
992 | ||
993 | return 0; | |
994 | } | |
995 | EXPORT_SYMBOL(hci_unregister_cb); | |
996 | ||
997 | static int hci_send_frame(struct sk_buff *skb) | |
998 | { | |
999 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1000 | ||
1001 | if (!hdev) { | |
1002 | kfree_skb(skb); | |
1003 | return -ENODEV; | |
1004 | } | |
1005 | ||
0d48d939 | 1006 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1007 | |
1008 | if (atomic_read(&hdev->promisc)) { | |
1009 | /* Time stamp */ | |
a61bbcf2 | 1010 | __net_timestamp(skb); |
1da177e4 LT |
1011 | |
1012 | hci_send_to_sock(hdev, skb); | |
1013 | } | |
1014 | ||
1015 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1016 | skb_orphan(skb); | |
1017 | ||
1018 | return hdev->send(skb); | |
1019 | } | |
1020 | ||
1021 | /* Send HCI command */ | |
1022 | int hci_send_cmd(struct hci_dev *hdev, __u16 ogf, __u16 ocf, __u32 plen, void *param) | |
1023 | { | |
1024 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1025 | struct hci_command_hdr *hdr; | |
1026 | struct sk_buff *skb; | |
1027 | ||
1028 | BT_DBG("%s ogf 0x%x ocf 0x%x plen %d", hdev->name, ogf, ocf, plen); | |
1029 | ||
1030 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1031 | if (!skb) { | |
1032 | BT_ERR("%s Can't allocate memory for HCI command", hdev->name); | |
1033 | return -ENOMEM; | |
1034 | } | |
1035 | ||
1036 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
aca3192c | 1037 | hdr->opcode = cpu_to_le16(hci_opcode_pack(ogf, ocf)); |
1da177e4 LT |
1038 | hdr->plen = plen; |
1039 | ||
1040 | if (plen) | |
1041 | memcpy(skb_put(skb, plen), param, plen); | |
1042 | ||
1043 | BT_DBG("skb len %d", skb->len); | |
1044 | ||
0d48d939 | 1045 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 LT |
1046 | skb->dev = (void *) hdev; |
1047 | skb_queue_tail(&hdev->cmd_q, skb); | |
1048 | hci_sched_cmd(hdev); | |
1049 | ||
1050 | return 0; | |
1051 | } | |
1da177e4 LT |
1052 | |
1053 | /* Get data from the previously sent command */ | |
1054 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 ogf, __u16 ocf) | |
1055 | { | |
1056 | struct hci_command_hdr *hdr; | |
1057 | ||
1058 | if (!hdev->sent_cmd) | |
1059 | return NULL; | |
1060 | ||
1061 | hdr = (void *) hdev->sent_cmd->data; | |
1062 | ||
aca3192c | 1063 | if (hdr->opcode != cpu_to_le16(hci_opcode_pack(ogf, ocf))) |
1da177e4 LT |
1064 | return NULL; |
1065 | ||
1066 | BT_DBG("%s ogf 0x%x ocf 0x%x", hdev->name, ogf, ocf); | |
1067 | ||
1068 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1069 | } | |
1070 | ||
1071 | /* Send ACL data */ | |
1072 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1073 | { | |
1074 | struct hci_acl_hdr *hdr; | |
1075 | int len = skb->len; | |
1076 | ||
badff6d0 ACM |
1077 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1078 | skb_reset_transport_header(skb); | |
9c70220b | 1079 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1080 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1081 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1082 | } |
1083 | ||
1084 | int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) | |
1085 | { | |
1086 | struct hci_dev *hdev = conn->hdev; | |
1087 | struct sk_buff *list; | |
1088 | ||
1089 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); | |
1090 | ||
1091 | skb->dev = (void *) hdev; | |
0d48d939 | 1092 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1093 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_START); |
1094 | ||
1095 | if (!(list = skb_shinfo(skb)->frag_list)) { | |
1096 | /* Non fragmented */ | |
1097 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1098 | ||
1099 | skb_queue_tail(&conn->data_q, skb); | |
1100 | } else { | |
1101 | /* Fragmented */ | |
1102 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1103 | ||
1104 | skb_shinfo(skb)->frag_list = NULL; | |
1105 | ||
1106 | /* Queue all fragments atomically */ | |
1107 | spin_lock_bh(&conn->data_q.lock); | |
1108 | ||
1109 | __skb_queue_tail(&conn->data_q, skb); | |
1110 | do { | |
1111 | skb = list; list = list->next; | |
8e87d142 | 1112 | |
1da177e4 | 1113 | skb->dev = (void *) hdev; |
0d48d939 | 1114 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1115 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT); |
1116 | ||
1117 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1118 | ||
1119 | __skb_queue_tail(&conn->data_q, skb); | |
1120 | } while (list); | |
1121 | ||
1122 | spin_unlock_bh(&conn->data_q.lock); | |
1123 | } | |
1124 | ||
1125 | hci_sched_tx(hdev); | |
1126 | return 0; | |
1127 | } | |
1128 | EXPORT_SYMBOL(hci_send_acl); | |
1129 | ||
1130 | /* Send SCO data */ | |
1131 | int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) | |
1132 | { | |
1133 | struct hci_dev *hdev = conn->hdev; | |
1134 | struct hci_sco_hdr hdr; | |
1135 | ||
1136 | BT_DBG("%s len %d", hdev->name, skb->len); | |
1137 | ||
1138 | if (skb->len > hdev->sco_mtu) { | |
1139 | kfree_skb(skb); | |
1140 | return -EINVAL; | |
1141 | } | |
1142 | ||
aca3192c | 1143 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
1144 | hdr.dlen = skb->len; |
1145 | ||
badff6d0 ACM |
1146 | skb_push(skb, HCI_SCO_HDR_SIZE); |
1147 | skb_reset_transport_header(skb); | |
9c70220b | 1148 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
1149 | |
1150 | skb->dev = (void *) hdev; | |
0d48d939 | 1151 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
1da177e4 LT |
1152 | skb_queue_tail(&conn->data_q, skb); |
1153 | hci_sched_tx(hdev); | |
1154 | return 0; | |
1155 | } | |
1156 | EXPORT_SYMBOL(hci_send_sco); | |
1157 | ||
1158 | /* ---- HCI TX task (outgoing data) ---- */ | |
1159 | ||
1160 | /* HCI Connection scheduler */ | |
1161 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
1162 | { | |
1163 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1164 | struct hci_conn *conn = NULL; | |
1165 | int num = 0, min = ~0; | |
1166 | struct list_head *p; | |
1167 | ||
8e87d142 | 1168 | /* We don't have to lock device here. Connections are always |
1da177e4 LT |
1169 | * added and removed with TX task disabled. */ |
1170 | list_for_each(p, &h->list) { | |
1171 | struct hci_conn *c; | |
1172 | c = list_entry(p, struct hci_conn, list); | |
1173 | ||
1174 | if (c->type != type || c->state != BT_CONNECTED | |
1175 | || skb_queue_empty(&c->data_q)) | |
1176 | continue; | |
1177 | num++; | |
1178 | ||
1179 | if (c->sent < min) { | |
1180 | min = c->sent; | |
1181 | conn = c; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | if (conn) { | |
1186 | int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt); | |
1187 | int q = cnt / num; | |
1188 | *quote = q ? q : 1; | |
1189 | } else | |
1190 | *quote = 0; | |
1191 | ||
1192 | BT_DBG("conn %p quote %d", conn, *quote); | |
1193 | return conn; | |
1194 | } | |
1195 | ||
1196 | static inline void hci_acl_tx_to(struct hci_dev *hdev) | |
1197 | { | |
1198 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1199 | struct list_head *p; | |
1200 | struct hci_conn *c; | |
1201 | ||
1202 | BT_ERR("%s ACL tx timeout", hdev->name); | |
1203 | ||
1204 | /* Kill stalled connections */ | |
1205 | list_for_each(p, &h->list) { | |
1206 | c = list_entry(p, struct hci_conn, list); | |
1207 | if (c->type == ACL_LINK && c->sent) { | |
1208 | BT_ERR("%s killing stalled ACL connection %s", | |
1209 | hdev->name, batostr(&c->dst)); | |
1210 | hci_acl_disconn(c, 0x13); | |
1211 | } | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
1216 | { | |
1217 | struct hci_conn *conn; | |
1218 | struct sk_buff *skb; | |
1219 | int quote; | |
1220 | ||
1221 | BT_DBG("%s", hdev->name); | |
1222 | ||
1223 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1224 | /* ACL tx timeout must be longer than maximum | |
1225 | * link supervision timeout (40.9 seconds) */ | |
1226 | if (!hdev->acl_cnt && (jiffies - hdev->acl_last_tx) > (HZ * 45)) | |
1227 | hci_acl_tx_to(hdev); | |
1228 | } | |
1229 | ||
1230 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { | |
1231 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1232 | BT_DBG("skb %p len %d", skb, skb->len); | |
04837f64 MH |
1233 | |
1234 | hci_conn_enter_active_mode(conn); | |
1235 | ||
1da177e4 LT |
1236 | hci_send_frame(skb); |
1237 | hdev->acl_last_tx = jiffies; | |
1238 | ||
1239 | hdev->acl_cnt--; | |
1240 | conn->sent++; | |
1241 | } | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | /* Schedule SCO */ | |
1246 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
1247 | { | |
1248 | struct hci_conn *conn; | |
1249 | struct sk_buff *skb; | |
1250 | int quote; | |
1251 | ||
1252 | BT_DBG("%s", hdev->name); | |
1253 | ||
1254 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { | |
1255 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1256 | BT_DBG("skb %p len %d", skb, skb->len); | |
1257 | hci_send_frame(skb); | |
1258 | ||
1259 | conn->sent++; | |
1260 | if (conn->sent == ~0) | |
1261 | conn->sent = 0; | |
1262 | } | |
1263 | } | |
1264 | } | |
1265 | ||
1266 | static void hci_tx_task(unsigned long arg) | |
1267 | { | |
1268 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1269 | struct sk_buff *skb; | |
1270 | ||
1271 | read_lock(&hci_task_lock); | |
1272 | ||
1273 | BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt); | |
1274 | ||
1275 | /* Schedule queues and send stuff to HCI driver */ | |
1276 | ||
1277 | hci_sched_acl(hdev); | |
1278 | ||
1279 | hci_sched_sco(hdev); | |
1280 | ||
1281 | /* Send next queued raw (unknown type) packet */ | |
1282 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
1283 | hci_send_frame(skb); | |
1284 | ||
1285 | read_unlock(&hci_task_lock); | |
1286 | } | |
1287 | ||
1288 | /* ----- HCI RX task (incoming data proccessing) ----- */ | |
1289 | ||
1290 | /* ACL data packet */ | |
1291 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1292 | { | |
1293 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
1294 | struct hci_conn *conn; | |
1295 | __u16 handle, flags; | |
1296 | ||
1297 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
1298 | ||
1299 | handle = __le16_to_cpu(hdr->handle); | |
1300 | flags = hci_flags(handle); | |
1301 | handle = hci_handle(handle); | |
1302 | ||
1303 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
1304 | ||
1305 | hdev->stat.acl_rx++; | |
1306 | ||
1307 | hci_dev_lock(hdev); | |
1308 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1309 | hci_dev_unlock(hdev); | |
8e87d142 | 1310 | |
1da177e4 LT |
1311 | if (conn) { |
1312 | register struct hci_proto *hp; | |
1313 | ||
04837f64 MH |
1314 | hci_conn_enter_active_mode(conn); |
1315 | ||
1da177e4 LT |
1316 | /* Send to upper protocol */ |
1317 | if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) { | |
1318 | hp->recv_acldata(conn, skb, flags); | |
1319 | return; | |
1320 | } | |
1321 | } else { | |
8e87d142 | 1322 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
1323 | hdev->name, handle); |
1324 | } | |
1325 | ||
1326 | kfree_skb(skb); | |
1327 | } | |
1328 | ||
1329 | /* SCO data packet */ | |
1330 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1331 | { | |
1332 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
1333 | struct hci_conn *conn; | |
1334 | __u16 handle; | |
1335 | ||
1336 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
1337 | ||
1338 | handle = __le16_to_cpu(hdr->handle); | |
1339 | ||
1340 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
1341 | ||
1342 | hdev->stat.sco_rx++; | |
1343 | ||
1344 | hci_dev_lock(hdev); | |
1345 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1346 | hci_dev_unlock(hdev); | |
1347 | ||
1348 | if (conn) { | |
1349 | register struct hci_proto *hp; | |
1350 | ||
1351 | /* Send to upper protocol */ | |
1352 | if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) { | |
1353 | hp->recv_scodata(conn, skb); | |
1354 | return; | |
1355 | } | |
1356 | } else { | |
8e87d142 | 1357 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
1358 | hdev->name, handle); |
1359 | } | |
1360 | ||
1361 | kfree_skb(skb); | |
1362 | } | |
1363 | ||
6516455d | 1364 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
1365 | { |
1366 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1367 | struct sk_buff *skb; | |
1368 | ||
1369 | BT_DBG("%s", hdev->name); | |
1370 | ||
1371 | read_lock(&hci_task_lock); | |
1372 | ||
1373 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
1374 | if (atomic_read(&hdev->promisc)) { | |
1375 | /* Send copy to the sockets */ | |
1376 | hci_send_to_sock(hdev, skb); | |
1377 | } | |
1378 | ||
1379 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
1380 | kfree_skb(skb); | |
1381 | continue; | |
1382 | } | |
1383 | ||
1384 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
1385 | /* Don't process data packets in this states. */ | |
0d48d939 | 1386 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1387 | case HCI_ACLDATA_PKT: |
1388 | case HCI_SCODATA_PKT: | |
1389 | kfree_skb(skb); | |
1390 | continue; | |
1391 | }; | |
1392 | } | |
1393 | ||
1394 | /* Process frame */ | |
0d48d939 | 1395 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1396 | case HCI_EVENT_PKT: |
1397 | hci_event_packet(hdev, skb); | |
1398 | break; | |
1399 | ||
1400 | case HCI_ACLDATA_PKT: | |
1401 | BT_DBG("%s ACL data packet", hdev->name); | |
1402 | hci_acldata_packet(hdev, skb); | |
1403 | break; | |
1404 | ||
1405 | case HCI_SCODATA_PKT: | |
1406 | BT_DBG("%s SCO data packet", hdev->name); | |
1407 | hci_scodata_packet(hdev, skb); | |
1408 | break; | |
1409 | ||
1410 | default: | |
1411 | kfree_skb(skb); | |
1412 | break; | |
1413 | } | |
1414 | } | |
1415 | ||
1416 | read_unlock(&hci_task_lock); | |
1417 | } | |
1418 | ||
1419 | static void hci_cmd_task(unsigned long arg) | |
1420 | { | |
1421 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1422 | struct sk_buff *skb; | |
1423 | ||
1424 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
1425 | ||
1426 | if (!atomic_read(&hdev->cmd_cnt) && (jiffies - hdev->cmd_last_tx) > HZ) { | |
1427 | BT_ERR("%s command tx timeout", hdev->name); | |
1428 | atomic_set(&hdev->cmd_cnt, 1); | |
1429 | } | |
1430 | ||
1431 | /* Send queued commands */ | |
1432 | if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) { | |
1433 | if (hdev->sent_cmd) | |
1434 | kfree_skb(hdev->sent_cmd); | |
1435 | ||
1436 | if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) { | |
1437 | atomic_dec(&hdev->cmd_cnt); | |
1438 | hci_send_frame(skb); | |
1439 | hdev->cmd_last_tx = jiffies; | |
1440 | } else { | |
1441 | skb_queue_head(&hdev->cmd_q, skb); | |
1442 | hci_sched_cmd(hdev); | |
1443 | } | |
1444 | } | |
1445 | } |