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> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/notifier.h> | |
42 | #include <net/sock.h> | |
43 | ||
44 | #include <asm/system.h> | |
45 | #include <asm/uaccess.h> | |
46 | #include <asm/unaligned.h> | |
47 | ||
48 | #include <net/bluetooth/bluetooth.h> | |
49 | #include <net/bluetooth/hci_core.h> | |
50 | ||
1da177e4 LT |
51 | static void hci_cmd_task(unsigned long arg); |
52 | static void hci_rx_task(unsigned long arg); | |
53 | static void hci_tx_task(unsigned long arg); | |
54 | static void hci_notify(struct hci_dev *hdev, int event); | |
55 | ||
56 | static DEFINE_RWLOCK(hci_task_lock); | |
57 | ||
58 | /* HCI device list */ | |
59 | LIST_HEAD(hci_dev_list); | |
60 | DEFINE_RWLOCK(hci_dev_list_lock); | |
61 | ||
62 | /* HCI callback list */ | |
63 | LIST_HEAD(hci_cb_list); | |
64 | DEFINE_RWLOCK(hci_cb_list_lock); | |
65 | ||
66 | /* HCI protocols */ | |
67 | #define HCI_MAX_PROTO 2 | |
68 | struct hci_proto *hci_proto[HCI_MAX_PROTO]; | |
69 | ||
70 | /* HCI notifiers list */ | |
e041c683 | 71 | static ATOMIC_NOTIFIER_HEAD(hci_notifier); |
1da177e4 LT |
72 | |
73 | /* ---- HCI notifications ---- */ | |
74 | ||
75 | int hci_register_notifier(struct notifier_block *nb) | |
76 | { | |
e041c683 | 77 | return atomic_notifier_chain_register(&hci_notifier, nb); |
1da177e4 LT |
78 | } |
79 | ||
80 | int hci_unregister_notifier(struct notifier_block *nb) | |
81 | { | |
e041c683 | 82 | return atomic_notifier_chain_unregister(&hci_notifier, nb); |
1da177e4 LT |
83 | } |
84 | ||
6516455d | 85 | static void hci_notify(struct hci_dev *hdev, int event) |
1da177e4 | 86 | { |
e041c683 | 87 | atomic_notifier_call_chain(&hci_notifier, event, hdev); |
1da177e4 LT |
88 | } |
89 | ||
90 | /* ---- HCI requests ---- */ | |
91 | ||
92 | void hci_req_complete(struct hci_dev *hdev, int result) | |
93 | { | |
94 | BT_DBG("%s result 0x%2.2x", hdev->name, result); | |
95 | ||
96 | if (hdev->req_status == HCI_REQ_PEND) { | |
97 | hdev->req_result = result; | |
98 | hdev->req_status = HCI_REQ_DONE; | |
99 | wake_up_interruptible(&hdev->req_wait_q); | |
100 | } | |
101 | } | |
102 | ||
103 | static void hci_req_cancel(struct hci_dev *hdev, int err) | |
104 | { | |
105 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
106 | ||
107 | if (hdev->req_status == HCI_REQ_PEND) { | |
108 | hdev->req_result = err; | |
109 | hdev->req_status = HCI_REQ_CANCELED; | |
110 | wake_up_interruptible(&hdev->req_wait_q); | |
111 | } | |
112 | } | |
113 | ||
114 | /* Execute request and wait for completion. */ | |
8e87d142 | 115 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
1da177e4 LT |
116 | unsigned long opt, __u32 timeout) |
117 | { | |
118 | DECLARE_WAITQUEUE(wait, current); | |
119 | int err = 0; | |
120 | ||
121 | BT_DBG("%s start", hdev->name); | |
122 | ||
123 | hdev->req_status = HCI_REQ_PEND; | |
124 | ||
125 | add_wait_queue(&hdev->req_wait_q, &wait); | |
126 | set_current_state(TASK_INTERRUPTIBLE); | |
127 | ||
128 | req(hdev, opt); | |
129 | schedule_timeout(timeout); | |
130 | ||
131 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
132 | ||
133 | if (signal_pending(current)) | |
134 | return -EINTR; | |
135 | ||
136 | switch (hdev->req_status) { | |
137 | case HCI_REQ_DONE: | |
138 | err = -bt_err(hdev->req_result); | |
139 | break; | |
140 | ||
141 | case HCI_REQ_CANCELED: | |
142 | err = -hdev->req_result; | |
143 | break; | |
144 | ||
145 | default: | |
146 | err = -ETIMEDOUT; | |
147 | break; | |
3ff50b79 | 148 | } |
1da177e4 LT |
149 | |
150 | hdev->req_status = hdev->req_result = 0; | |
151 | ||
152 | BT_DBG("%s end: err %d", hdev->name, err); | |
153 | ||
154 | return err; | |
155 | } | |
156 | ||
157 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), | |
158 | unsigned long opt, __u32 timeout) | |
159 | { | |
160 | int ret; | |
161 | ||
7c6a329e MH |
162 | if (!test_bit(HCI_UP, &hdev->flags)) |
163 | return -ENETDOWN; | |
164 | ||
1da177e4 LT |
165 | /* Serialize all requests */ |
166 | hci_req_lock(hdev); | |
167 | ret = __hci_request(hdev, req, opt, timeout); | |
168 | hci_req_unlock(hdev); | |
169 | ||
170 | return ret; | |
171 | } | |
172 | ||
173 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) | |
174 | { | |
175 | BT_DBG("%s %ld", hdev->name, opt); | |
176 | ||
177 | /* Reset device */ | |
a9de9248 | 178 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
179 | } |
180 | ||
181 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) | |
182 | { | |
183 | struct sk_buff *skb; | |
1ebb9252 | 184 | __le16 param; |
89f2783d | 185 | __u8 flt_type; |
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 */ | |
7a9d4020 | 203 | if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) |
a9de9248 | 204 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
205 | |
206 | /* Read Local Supported Features */ | |
a9de9248 | 207 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
1da177e4 | 208 | |
1143e5a6 | 209 | /* Read Local Version */ |
a9de9248 | 210 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
1143e5a6 | 211 | |
1da177e4 | 212 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
a9de9248 | 213 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
1da177e4 LT |
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); | |
a9de9248 | 223 | hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
1da177e4 LT |
224 | } |
225 | #endif | |
226 | ||
227 | /* Read BD Address */ | |
a9de9248 MH |
228 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
229 | ||
230 | /* Read Class of Device */ | |
231 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); | |
232 | ||
233 | /* Read Local Name */ | |
234 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); | |
1da177e4 LT |
235 | |
236 | /* Read Voice Setting */ | |
a9de9248 | 237 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
1da177e4 LT |
238 | |
239 | /* Optional initialization */ | |
240 | ||
241 | /* Clear Event Filters */ | |
89f2783d | 242 | flt_type = HCI_FLT_CLEAR_ALL; |
a9de9248 | 243 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
1da177e4 LT |
244 | |
245 | /* Page timeout ~20 secs */ | |
aca3192c | 246 | param = cpu_to_le16(0x8000); |
a9de9248 | 247 | hci_send_cmd(hdev, HCI_OP_WRITE_PG_TIMEOUT, 2, ¶m); |
1da177e4 LT |
248 | |
249 | /* Connection accept timeout ~20 secs */ | |
aca3192c | 250 | param = cpu_to_le16(0x7d00); |
a9de9248 | 251 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
1da177e4 LT |
252 | } |
253 | ||
254 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) | |
255 | { | |
256 | __u8 scan = opt; | |
257 | ||
258 | BT_DBG("%s %x", hdev->name, scan); | |
259 | ||
260 | /* Inquiry and Page scans */ | |
a9de9248 | 261 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1da177e4 LT |
262 | } |
263 | ||
264 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
265 | { | |
266 | __u8 auth = opt; | |
267 | ||
268 | BT_DBG("%s %x", hdev->name, auth); | |
269 | ||
270 | /* Authentication */ | |
a9de9248 | 271 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
1da177e4 LT |
272 | } |
273 | ||
274 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
275 | { | |
276 | __u8 encrypt = opt; | |
277 | ||
278 | BT_DBG("%s %x", hdev->name, encrypt); | |
279 | ||
e4e8e37c | 280 | /* Encryption */ |
a9de9248 | 281 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
1da177e4 LT |
282 | } |
283 | ||
e4e8e37c MH |
284 | static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
285 | { | |
286 | __le16 policy = cpu_to_le16(opt); | |
287 | ||
a418b893 | 288 | BT_DBG("%s %x", hdev->name, policy); |
e4e8e37c MH |
289 | |
290 | /* Default link policy */ | |
291 | hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); | |
292 | } | |
293 | ||
8e87d142 | 294 | /* Get HCI device by index. |
1da177e4 LT |
295 | * Device is held on return. */ |
296 | struct hci_dev *hci_dev_get(int index) | |
297 | { | |
298 | struct hci_dev *hdev = NULL; | |
299 | struct list_head *p; | |
300 | ||
301 | BT_DBG("%d", index); | |
302 | ||
303 | if (index < 0) | |
304 | return NULL; | |
305 | ||
306 | read_lock(&hci_dev_list_lock); | |
307 | list_for_each(p, &hci_dev_list) { | |
308 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
309 | if (d->id == index) { | |
310 | hdev = hci_dev_hold(d); | |
311 | break; | |
312 | } | |
313 | } | |
314 | read_unlock(&hci_dev_list_lock); | |
315 | return hdev; | |
316 | } | |
1da177e4 LT |
317 | |
318 | /* ---- Inquiry support ---- */ | |
319 | static void inquiry_cache_flush(struct hci_dev *hdev) | |
320 | { | |
321 | struct inquiry_cache *cache = &hdev->inq_cache; | |
322 | struct inquiry_entry *next = cache->list, *e; | |
323 | ||
324 | BT_DBG("cache %p", cache); | |
325 | ||
326 | cache->list = NULL; | |
327 | while ((e = next)) { | |
328 | next = e->next; | |
329 | kfree(e); | |
330 | } | |
331 | } | |
332 | ||
333 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
334 | { | |
335 | struct inquiry_cache *cache = &hdev->inq_cache; | |
336 | struct inquiry_entry *e; | |
337 | ||
338 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
339 | ||
340 | for (e = cache->list; e; e = e->next) | |
341 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
342 | break; | |
343 | return e; | |
344 | } | |
345 | ||
346 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) | |
347 | { | |
348 | struct inquiry_cache *cache = &hdev->inq_cache; | |
349 | struct inquiry_entry *e; | |
350 | ||
351 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
352 | ||
353 | if (!(e = hci_inquiry_cache_lookup(hdev, &data->bdaddr))) { | |
354 | /* Entry not in the cache. Add new one. */ | |
25ea6db0 | 355 | if (!(e = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC))) |
1da177e4 | 356 | return; |
1da177e4 LT |
357 | e->next = cache->list; |
358 | cache->list = e; | |
359 | } | |
360 | ||
361 | memcpy(&e->data, data, sizeof(*data)); | |
362 | e->timestamp = jiffies; | |
363 | cache->timestamp = jiffies; | |
364 | } | |
365 | ||
366 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
367 | { | |
368 | struct inquiry_cache *cache = &hdev->inq_cache; | |
369 | struct inquiry_info *info = (struct inquiry_info *) buf; | |
370 | struct inquiry_entry *e; | |
371 | int copied = 0; | |
372 | ||
373 | for (e = cache->list; e && copied < num; e = e->next, copied++) { | |
374 | struct inquiry_data *data = &e->data; | |
375 | bacpy(&info->bdaddr, &data->bdaddr); | |
376 | info->pscan_rep_mode = data->pscan_rep_mode; | |
377 | info->pscan_period_mode = data->pscan_period_mode; | |
378 | info->pscan_mode = data->pscan_mode; | |
379 | memcpy(info->dev_class, data->dev_class, 3); | |
380 | info->clock_offset = data->clock_offset; | |
381 | info++; | |
382 | } | |
383 | ||
384 | BT_DBG("cache %p, copied %d", cache, copied); | |
385 | return copied; | |
386 | } | |
387 | ||
388 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
389 | { | |
390 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
391 | struct hci_cp_inquiry cp; | |
392 | ||
393 | BT_DBG("%s", hdev->name); | |
394 | ||
395 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
396 | return; | |
397 | ||
398 | /* Start Inquiry */ | |
399 | memcpy(&cp.lap, &ir->lap, 3); | |
400 | cp.length = ir->length; | |
401 | cp.num_rsp = ir->num_rsp; | |
a9de9248 | 402 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
1da177e4 LT |
403 | } |
404 | ||
405 | int hci_inquiry(void __user *arg) | |
406 | { | |
407 | __u8 __user *ptr = arg; | |
408 | struct hci_inquiry_req ir; | |
409 | struct hci_dev *hdev; | |
410 | int err = 0, do_inquiry = 0, max_rsp; | |
411 | long timeo; | |
412 | __u8 *buf; | |
413 | ||
414 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
415 | return -EFAULT; | |
416 | ||
417 | if (!(hdev = hci_dev_get(ir.dev_id))) | |
418 | return -ENODEV; | |
419 | ||
420 | hci_dev_lock_bh(hdev); | |
8e87d142 | 421 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
1da177e4 LT |
422 | inquiry_cache_empty(hdev) || |
423 | ir.flags & IREQ_CACHE_FLUSH) { | |
424 | inquiry_cache_flush(hdev); | |
425 | do_inquiry = 1; | |
426 | } | |
427 | hci_dev_unlock_bh(hdev); | |
428 | ||
04837f64 | 429 | timeo = ir.length * msecs_to_jiffies(2000); |
1da177e4 LT |
430 | if (do_inquiry && (err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo)) < 0) |
431 | goto done; | |
432 | ||
433 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
434 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
435 | ||
436 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
437 | * copy it to the user space. | |
438 | */ | |
439 | if (!(buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL))) { | |
440 | err = -ENOMEM; | |
441 | goto done; | |
442 | } | |
443 | ||
444 | hci_dev_lock_bh(hdev); | |
445 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); | |
446 | hci_dev_unlock_bh(hdev); | |
447 | ||
448 | BT_DBG("num_rsp %d", ir.num_rsp); | |
449 | ||
450 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
451 | ptr += sizeof(ir); | |
452 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
453 | ir.num_rsp)) | |
454 | err = -EFAULT; | |
8e87d142 | 455 | } else |
1da177e4 LT |
456 | err = -EFAULT; |
457 | ||
458 | kfree(buf); | |
459 | ||
460 | done: | |
461 | hci_dev_put(hdev); | |
462 | return err; | |
463 | } | |
464 | ||
465 | /* ---- HCI ioctl helpers ---- */ | |
466 | ||
467 | int hci_dev_open(__u16 dev) | |
468 | { | |
469 | struct hci_dev *hdev; | |
470 | int ret = 0; | |
471 | ||
472 | if (!(hdev = hci_dev_get(dev))) | |
473 | return -ENODEV; | |
474 | ||
475 | BT_DBG("%s %p", hdev->name, hdev); | |
476 | ||
477 | hci_req_lock(hdev); | |
478 | ||
479 | if (test_bit(HCI_UP, &hdev->flags)) { | |
480 | ret = -EALREADY; | |
481 | goto done; | |
482 | } | |
483 | ||
484 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
485 | set_bit(HCI_RAW, &hdev->flags); | |
486 | ||
487 | if (hdev->open(hdev)) { | |
488 | ret = -EIO; | |
489 | goto done; | |
490 | } | |
491 | ||
492 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
493 | atomic_set(&hdev->cmd_cnt, 1); | |
494 | set_bit(HCI_INIT, &hdev->flags); | |
495 | ||
496 | //__hci_request(hdev, hci_reset_req, 0, HZ); | |
04837f64 MH |
497 | ret = __hci_request(hdev, hci_init_req, 0, |
498 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
499 | |
500 | clear_bit(HCI_INIT, &hdev->flags); | |
501 | } | |
502 | ||
503 | if (!ret) { | |
504 | hci_dev_hold(hdev); | |
505 | set_bit(HCI_UP, &hdev->flags); | |
506 | hci_notify(hdev, HCI_DEV_UP); | |
8e87d142 | 507 | } else { |
1da177e4 LT |
508 | /* Init failed, cleanup */ |
509 | tasklet_kill(&hdev->rx_task); | |
510 | tasklet_kill(&hdev->tx_task); | |
511 | tasklet_kill(&hdev->cmd_task); | |
512 | ||
513 | skb_queue_purge(&hdev->cmd_q); | |
514 | skb_queue_purge(&hdev->rx_q); | |
515 | ||
516 | if (hdev->flush) | |
517 | hdev->flush(hdev); | |
518 | ||
519 | if (hdev->sent_cmd) { | |
520 | kfree_skb(hdev->sent_cmd); | |
521 | hdev->sent_cmd = NULL; | |
522 | } | |
523 | ||
524 | hdev->close(hdev); | |
525 | hdev->flags = 0; | |
526 | } | |
527 | ||
528 | done: | |
529 | hci_req_unlock(hdev); | |
530 | hci_dev_put(hdev); | |
531 | return ret; | |
532 | } | |
533 | ||
534 | static int hci_dev_do_close(struct hci_dev *hdev) | |
535 | { | |
536 | BT_DBG("%s %p", hdev->name, hdev); | |
537 | ||
538 | hci_req_cancel(hdev, ENODEV); | |
539 | hci_req_lock(hdev); | |
540 | ||
541 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
542 | hci_req_unlock(hdev); | |
543 | return 0; | |
544 | } | |
545 | ||
546 | /* Kill RX and TX tasks */ | |
547 | tasklet_kill(&hdev->rx_task); | |
548 | tasklet_kill(&hdev->tx_task); | |
549 | ||
550 | hci_dev_lock_bh(hdev); | |
551 | inquiry_cache_flush(hdev); | |
552 | hci_conn_hash_flush(hdev); | |
553 | hci_dev_unlock_bh(hdev); | |
554 | ||
555 | hci_notify(hdev, HCI_DEV_DOWN); | |
556 | ||
557 | if (hdev->flush) | |
558 | hdev->flush(hdev); | |
559 | ||
560 | /* Reset device */ | |
561 | skb_queue_purge(&hdev->cmd_q); | |
562 | atomic_set(&hdev->cmd_cnt, 1); | |
563 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
564 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 MH |
565 | __hci_request(hdev, hci_reset_req, 0, |
566 | msecs_to_jiffies(250)); | |
1da177e4 LT |
567 | clear_bit(HCI_INIT, &hdev->flags); |
568 | } | |
569 | ||
570 | /* Kill cmd task */ | |
571 | tasklet_kill(&hdev->cmd_task); | |
572 | ||
573 | /* Drop queues */ | |
574 | skb_queue_purge(&hdev->rx_q); | |
575 | skb_queue_purge(&hdev->cmd_q); | |
576 | skb_queue_purge(&hdev->raw_q); | |
577 | ||
578 | /* Drop last sent command */ | |
579 | if (hdev->sent_cmd) { | |
580 | kfree_skb(hdev->sent_cmd); | |
581 | hdev->sent_cmd = NULL; | |
582 | } | |
583 | ||
584 | /* After this point our queues are empty | |
585 | * and no tasks are scheduled. */ | |
586 | hdev->close(hdev); | |
587 | ||
588 | /* Clear flags */ | |
589 | hdev->flags = 0; | |
590 | ||
591 | hci_req_unlock(hdev); | |
592 | ||
593 | hci_dev_put(hdev); | |
594 | return 0; | |
595 | } | |
596 | ||
597 | int hci_dev_close(__u16 dev) | |
598 | { | |
599 | struct hci_dev *hdev; | |
600 | int err; | |
601 | ||
602 | if (!(hdev = hci_dev_get(dev))) | |
603 | return -ENODEV; | |
604 | err = hci_dev_do_close(hdev); | |
605 | hci_dev_put(hdev); | |
606 | return err; | |
607 | } | |
608 | ||
609 | int hci_dev_reset(__u16 dev) | |
610 | { | |
611 | struct hci_dev *hdev; | |
612 | int ret = 0; | |
613 | ||
614 | if (!(hdev = hci_dev_get(dev))) | |
615 | return -ENODEV; | |
616 | ||
617 | hci_req_lock(hdev); | |
618 | tasklet_disable(&hdev->tx_task); | |
619 | ||
620 | if (!test_bit(HCI_UP, &hdev->flags)) | |
621 | goto done; | |
622 | ||
623 | /* Drop queues */ | |
624 | skb_queue_purge(&hdev->rx_q); | |
625 | skb_queue_purge(&hdev->cmd_q); | |
626 | ||
627 | hci_dev_lock_bh(hdev); | |
628 | inquiry_cache_flush(hdev); | |
629 | hci_conn_hash_flush(hdev); | |
630 | hci_dev_unlock_bh(hdev); | |
631 | ||
632 | if (hdev->flush) | |
633 | hdev->flush(hdev); | |
634 | ||
8e87d142 | 635 | atomic_set(&hdev->cmd_cnt, 1); |
1da177e4 LT |
636 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; |
637 | ||
638 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
639 | ret = __hci_request(hdev, hci_reset_req, 0, |
640 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
641 | |
642 | done: | |
643 | tasklet_enable(&hdev->tx_task); | |
644 | hci_req_unlock(hdev); | |
645 | hci_dev_put(hdev); | |
646 | return ret; | |
647 | } | |
648 | ||
649 | int hci_dev_reset_stat(__u16 dev) | |
650 | { | |
651 | struct hci_dev *hdev; | |
652 | int ret = 0; | |
653 | ||
654 | if (!(hdev = hci_dev_get(dev))) | |
655 | return -ENODEV; | |
656 | ||
657 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
658 | ||
659 | hci_dev_put(hdev); | |
660 | ||
661 | return ret; | |
662 | } | |
663 | ||
664 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
665 | { | |
666 | struct hci_dev *hdev; | |
667 | struct hci_dev_req dr; | |
668 | int err = 0; | |
669 | ||
670 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
671 | return -EFAULT; | |
672 | ||
673 | if (!(hdev = hci_dev_get(dr.dev_id))) | |
674 | return -ENODEV; | |
675 | ||
676 | switch (cmd) { | |
677 | case HCISETAUTH: | |
04837f64 MH |
678 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
679 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
680 | break; |
681 | ||
682 | case HCISETENCRYPT: | |
683 | if (!lmp_encrypt_capable(hdev)) { | |
684 | err = -EOPNOTSUPP; | |
685 | break; | |
686 | } | |
687 | ||
688 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
689 | /* Auth must be enabled first */ | |
04837f64 MH |
690 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
691 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
692 | if (err) |
693 | break; | |
694 | } | |
695 | ||
04837f64 MH |
696 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
697 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
698 | break; |
699 | ||
700 | case HCISETSCAN: | |
04837f64 MH |
701 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
702 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
703 | break; |
704 | ||
1da177e4 | 705 | case HCISETLINKPOL: |
e4e8e37c MH |
706 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
707 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
708 | break; |
709 | ||
710 | case HCISETLINKMODE: | |
e4e8e37c MH |
711 | hdev->link_mode = ((__u16) dr.dev_opt) & |
712 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
713 | break; | |
714 | ||
715 | case HCISETPTYPE: | |
716 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
717 | break; |
718 | ||
719 | case HCISETACLMTU: | |
e4e8e37c MH |
720 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
721 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
722 | break; |
723 | ||
724 | case HCISETSCOMTU: | |
e4e8e37c MH |
725 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
726 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
727 | break; |
728 | ||
729 | default: | |
730 | err = -EINVAL; | |
731 | break; | |
732 | } | |
e4e8e37c | 733 | |
1da177e4 LT |
734 | hci_dev_put(hdev); |
735 | return err; | |
736 | } | |
737 | ||
738 | int hci_get_dev_list(void __user *arg) | |
739 | { | |
740 | struct hci_dev_list_req *dl; | |
741 | struct hci_dev_req *dr; | |
742 | struct list_head *p; | |
743 | int n = 0, size, err; | |
744 | __u16 dev_num; | |
745 | ||
746 | if (get_user(dev_num, (__u16 __user *) arg)) | |
747 | return -EFAULT; | |
748 | ||
749 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
750 | return -EINVAL; | |
751 | ||
752 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
753 | ||
c6bf514c | 754 | if (!(dl = kzalloc(size, GFP_KERNEL))) |
1da177e4 LT |
755 | return -ENOMEM; |
756 | ||
757 | dr = dl->dev_req; | |
758 | ||
759 | read_lock_bh(&hci_dev_list_lock); | |
760 | list_for_each(p, &hci_dev_list) { | |
761 | struct hci_dev *hdev; | |
762 | hdev = list_entry(p, struct hci_dev, list); | |
763 | (dr + n)->dev_id = hdev->id; | |
764 | (dr + n)->dev_opt = hdev->flags; | |
765 | if (++n >= dev_num) | |
766 | break; | |
767 | } | |
768 | read_unlock_bh(&hci_dev_list_lock); | |
769 | ||
770 | dl->dev_num = n; | |
771 | size = sizeof(*dl) + n * sizeof(*dr); | |
772 | ||
773 | err = copy_to_user(arg, dl, size); | |
774 | kfree(dl); | |
775 | ||
776 | return err ? -EFAULT : 0; | |
777 | } | |
778 | ||
779 | int hci_get_dev_info(void __user *arg) | |
780 | { | |
781 | struct hci_dev *hdev; | |
782 | struct hci_dev_info di; | |
783 | int err = 0; | |
784 | ||
785 | if (copy_from_user(&di, arg, sizeof(di))) | |
786 | return -EFAULT; | |
787 | ||
788 | if (!(hdev = hci_dev_get(di.dev_id))) | |
789 | return -ENODEV; | |
790 | ||
791 | strcpy(di.name, hdev->name); | |
792 | di.bdaddr = hdev->bdaddr; | |
793 | di.type = hdev->type; | |
794 | di.flags = hdev->flags; | |
795 | di.pkt_type = hdev->pkt_type; | |
796 | di.acl_mtu = hdev->acl_mtu; | |
797 | di.acl_pkts = hdev->acl_pkts; | |
798 | di.sco_mtu = hdev->sco_mtu; | |
799 | di.sco_pkts = hdev->sco_pkts; | |
800 | di.link_policy = hdev->link_policy; | |
801 | di.link_mode = hdev->link_mode; | |
802 | ||
803 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
804 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
805 | ||
806 | if (copy_to_user(arg, &di, sizeof(di))) | |
807 | err = -EFAULT; | |
808 | ||
809 | hci_dev_put(hdev); | |
810 | ||
811 | return err; | |
812 | } | |
813 | ||
814 | /* ---- Interface to HCI drivers ---- */ | |
815 | ||
816 | /* Alloc HCI device */ | |
817 | struct hci_dev *hci_alloc_dev(void) | |
818 | { | |
819 | struct hci_dev *hdev; | |
820 | ||
25ea6db0 | 821 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
822 | if (!hdev) |
823 | return NULL; | |
824 | ||
1da177e4 LT |
825 | skb_queue_head_init(&hdev->driver_init); |
826 | ||
827 | return hdev; | |
828 | } | |
829 | EXPORT_SYMBOL(hci_alloc_dev); | |
830 | ||
831 | /* Free HCI device */ | |
832 | void hci_free_dev(struct hci_dev *hdev) | |
833 | { | |
834 | skb_queue_purge(&hdev->driver_init); | |
835 | ||
a91f2e39 MH |
836 | /* will free via device release */ |
837 | put_device(&hdev->dev); | |
1da177e4 LT |
838 | } |
839 | EXPORT_SYMBOL(hci_free_dev); | |
840 | ||
841 | /* Register HCI device */ | |
842 | int hci_register_dev(struct hci_dev *hdev) | |
843 | { | |
844 | struct list_head *head = &hci_dev_list, *p; | |
ef222013 | 845 | int i, id = 0; |
1da177e4 LT |
846 | |
847 | BT_DBG("%p name %s type %d owner %p", hdev, hdev->name, hdev->type, hdev->owner); | |
848 | ||
849 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
850 | return -EINVAL; | |
851 | ||
852 | write_lock_bh(&hci_dev_list_lock); | |
853 | ||
854 | /* Find first available device id */ | |
855 | list_for_each(p, &hci_dev_list) { | |
856 | if (list_entry(p, struct hci_dev, list)->id != id) | |
857 | break; | |
858 | head = p; id++; | |
859 | } | |
8e87d142 | 860 | |
1da177e4 LT |
861 | sprintf(hdev->name, "hci%d", id); |
862 | hdev->id = id; | |
863 | list_add(&hdev->list, head); | |
864 | ||
865 | atomic_set(&hdev->refcnt, 1); | |
866 | spin_lock_init(&hdev->lock); | |
867 | ||
868 | hdev->flags = 0; | |
869 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 870 | hdev->esco_type = (ESCO_HV1); |
1da177e4 LT |
871 | hdev->link_mode = (HCI_LM_ACCEPT); |
872 | ||
04837f64 MH |
873 | hdev->idle_timeout = 0; |
874 | hdev->sniff_max_interval = 800; | |
875 | hdev->sniff_min_interval = 80; | |
876 | ||
1da177e4 LT |
877 | tasklet_init(&hdev->cmd_task, hci_cmd_task,(unsigned long) hdev); |
878 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); | |
879 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
880 | ||
881 | skb_queue_head_init(&hdev->rx_q); | |
882 | skb_queue_head_init(&hdev->cmd_q); | |
883 | skb_queue_head_init(&hdev->raw_q); | |
884 | ||
ef222013 MH |
885 | for (i = 0; i < 3; i++) |
886 | hdev->reassembly[i] = NULL; | |
887 | ||
1da177e4 LT |
888 | init_waitqueue_head(&hdev->req_wait_q); |
889 | init_MUTEX(&hdev->req_lock); | |
890 | ||
891 | inquiry_cache_init(hdev); | |
892 | ||
893 | hci_conn_hash_init(hdev); | |
894 | ||
895 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
896 | ||
897 | atomic_set(&hdev->promisc, 0); | |
898 | ||
899 | write_unlock_bh(&hci_dev_list_lock); | |
900 | ||
901 | hci_register_sysfs(hdev); | |
902 | ||
903 | hci_notify(hdev, HCI_DEV_REG); | |
904 | ||
905 | return id; | |
906 | } | |
907 | EXPORT_SYMBOL(hci_register_dev); | |
908 | ||
909 | /* Unregister HCI device */ | |
910 | int hci_unregister_dev(struct hci_dev *hdev) | |
911 | { | |
ef222013 MH |
912 | int i; |
913 | ||
1da177e4 LT |
914 | BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); |
915 | ||
1da177e4 LT |
916 | write_lock_bh(&hci_dev_list_lock); |
917 | list_del(&hdev->list); | |
918 | write_unlock_bh(&hci_dev_list_lock); | |
919 | ||
920 | hci_dev_do_close(hdev); | |
921 | ||
ef222013 MH |
922 | for (i = 0; i < 3; i++) |
923 | kfree_skb(hdev->reassembly[i]); | |
924 | ||
1da177e4 LT |
925 | hci_notify(hdev, HCI_DEV_UNREG); |
926 | ||
147e2d59 DY |
927 | hci_unregister_sysfs(hdev); |
928 | ||
1da177e4 | 929 | __hci_dev_put(hdev); |
ef222013 | 930 | |
1da177e4 LT |
931 | return 0; |
932 | } | |
933 | EXPORT_SYMBOL(hci_unregister_dev); | |
934 | ||
935 | /* Suspend HCI device */ | |
936 | int hci_suspend_dev(struct hci_dev *hdev) | |
937 | { | |
938 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
939 | return 0; | |
940 | } | |
941 | EXPORT_SYMBOL(hci_suspend_dev); | |
942 | ||
943 | /* Resume HCI device */ | |
944 | int hci_resume_dev(struct hci_dev *hdev) | |
945 | { | |
946 | hci_notify(hdev, HCI_DEV_RESUME); | |
947 | return 0; | |
948 | } | |
949 | EXPORT_SYMBOL(hci_resume_dev); | |
950 | ||
ef222013 MH |
951 | /* Receive packet type fragment */ |
952 | #define __reassembly(hdev, type) ((hdev)->reassembly[(type) - 2]) | |
953 | ||
954 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) | |
955 | { | |
956 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) | |
957 | return -EILSEQ; | |
958 | ||
959 | while (count) { | |
960 | struct sk_buff *skb = __reassembly(hdev, type); | |
961 | struct { int expect; } *scb; | |
962 | int len = 0; | |
963 | ||
964 | if (!skb) { | |
965 | /* Start of the frame */ | |
966 | ||
967 | switch (type) { | |
968 | case HCI_EVENT_PKT: | |
969 | if (count >= HCI_EVENT_HDR_SIZE) { | |
970 | struct hci_event_hdr *h = data; | |
971 | len = HCI_EVENT_HDR_SIZE + h->plen; | |
972 | } else | |
973 | return -EILSEQ; | |
974 | break; | |
975 | ||
976 | case HCI_ACLDATA_PKT: | |
977 | if (count >= HCI_ACL_HDR_SIZE) { | |
978 | struct hci_acl_hdr *h = data; | |
979 | len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen); | |
980 | } else | |
981 | return -EILSEQ; | |
982 | break; | |
983 | ||
984 | case HCI_SCODATA_PKT: | |
985 | if (count >= HCI_SCO_HDR_SIZE) { | |
986 | struct hci_sco_hdr *h = data; | |
987 | len = HCI_SCO_HDR_SIZE + h->dlen; | |
988 | } else | |
989 | return -EILSEQ; | |
990 | break; | |
991 | } | |
992 | ||
993 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
994 | if (!skb) { | |
995 | BT_ERR("%s no memory for packet", hdev->name); | |
996 | return -ENOMEM; | |
997 | } | |
998 | ||
999 | skb->dev = (void *) hdev; | |
1000 | bt_cb(skb)->pkt_type = type; | |
00ae02f3 | 1001 | |
ef222013 MH |
1002 | __reassembly(hdev, type) = skb; |
1003 | ||
1004 | scb = (void *) skb->cb; | |
1005 | scb->expect = len; | |
1006 | } else { | |
1007 | /* Continuation */ | |
1008 | ||
1009 | scb = (void *) skb->cb; | |
1010 | len = scb->expect; | |
1011 | } | |
1012 | ||
1013 | len = min(len, count); | |
1014 | ||
1015 | memcpy(skb_put(skb, len), data, len); | |
1016 | ||
1017 | scb->expect -= len; | |
1018 | ||
1019 | if (scb->expect == 0) { | |
1020 | /* Complete frame */ | |
1021 | ||
1022 | __reassembly(hdev, type) = NULL; | |
1023 | ||
1024 | bt_cb(skb)->pkt_type = type; | |
1025 | hci_recv_frame(skb); | |
1026 | } | |
1027 | ||
1028 | count -= len; data += len; | |
1029 | } | |
1030 | ||
1031 | return 0; | |
1032 | } | |
1033 | EXPORT_SYMBOL(hci_recv_fragment); | |
1034 | ||
1da177e4 LT |
1035 | /* ---- Interface to upper protocols ---- */ |
1036 | ||
1037 | /* Register/Unregister protocols. | |
1038 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1039 | int hci_register_proto(struct hci_proto *hp) | |
1040 | { | |
1041 | int err = 0; | |
1042 | ||
1043 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1044 | ||
1045 | if (hp->id >= HCI_MAX_PROTO) | |
1046 | return -EINVAL; | |
1047 | ||
1048 | write_lock_bh(&hci_task_lock); | |
1049 | ||
1050 | if (!hci_proto[hp->id]) | |
1051 | hci_proto[hp->id] = hp; | |
1052 | else | |
1053 | err = -EEXIST; | |
1054 | ||
1055 | write_unlock_bh(&hci_task_lock); | |
1056 | ||
1057 | return err; | |
1058 | } | |
1059 | EXPORT_SYMBOL(hci_register_proto); | |
1060 | ||
1061 | int hci_unregister_proto(struct hci_proto *hp) | |
1062 | { | |
1063 | int err = 0; | |
1064 | ||
1065 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1066 | ||
1067 | if (hp->id >= HCI_MAX_PROTO) | |
1068 | return -EINVAL; | |
1069 | ||
1070 | write_lock_bh(&hci_task_lock); | |
1071 | ||
1072 | if (hci_proto[hp->id]) | |
1073 | hci_proto[hp->id] = NULL; | |
1074 | else | |
1075 | err = -ENOENT; | |
1076 | ||
1077 | write_unlock_bh(&hci_task_lock); | |
1078 | ||
1079 | return err; | |
1080 | } | |
1081 | EXPORT_SYMBOL(hci_unregister_proto); | |
1082 | ||
1083 | int hci_register_cb(struct hci_cb *cb) | |
1084 | { | |
1085 | BT_DBG("%p name %s", cb, cb->name); | |
1086 | ||
1087 | write_lock_bh(&hci_cb_list_lock); | |
1088 | list_add(&cb->list, &hci_cb_list); | |
1089 | write_unlock_bh(&hci_cb_list_lock); | |
1090 | ||
1091 | return 0; | |
1092 | } | |
1093 | EXPORT_SYMBOL(hci_register_cb); | |
1094 | ||
1095 | int hci_unregister_cb(struct hci_cb *cb) | |
1096 | { | |
1097 | BT_DBG("%p name %s", cb, cb->name); | |
1098 | ||
1099 | write_lock_bh(&hci_cb_list_lock); | |
1100 | list_del(&cb->list); | |
1101 | write_unlock_bh(&hci_cb_list_lock); | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | EXPORT_SYMBOL(hci_unregister_cb); | |
1106 | ||
1107 | static int hci_send_frame(struct sk_buff *skb) | |
1108 | { | |
1109 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1110 | ||
1111 | if (!hdev) { | |
1112 | kfree_skb(skb); | |
1113 | return -ENODEV; | |
1114 | } | |
1115 | ||
0d48d939 | 1116 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1117 | |
1118 | if (atomic_read(&hdev->promisc)) { | |
1119 | /* Time stamp */ | |
a61bbcf2 | 1120 | __net_timestamp(skb); |
1da177e4 LT |
1121 | |
1122 | hci_send_to_sock(hdev, skb); | |
1123 | } | |
1124 | ||
1125 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1126 | skb_orphan(skb); | |
1127 | ||
1128 | return hdev->send(skb); | |
1129 | } | |
1130 | ||
1131 | /* Send HCI command */ | |
a9de9248 | 1132 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1133 | { |
1134 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1135 | struct hci_command_hdr *hdr; | |
1136 | struct sk_buff *skb; | |
1137 | ||
a9de9248 | 1138 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1139 | |
1140 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1141 | if (!skb) { | |
ef222013 | 1142 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1143 | return -ENOMEM; |
1144 | } | |
1145 | ||
1146 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1147 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1148 | hdr->plen = plen; |
1149 | ||
1150 | if (plen) | |
1151 | memcpy(skb_put(skb, plen), param, plen); | |
1152 | ||
1153 | BT_DBG("skb len %d", skb->len); | |
1154 | ||
0d48d939 | 1155 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 LT |
1156 | skb->dev = (void *) hdev; |
1157 | skb_queue_tail(&hdev->cmd_q, skb); | |
1158 | hci_sched_cmd(hdev); | |
1159 | ||
1160 | return 0; | |
1161 | } | |
1da177e4 LT |
1162 | |
1163 | /* Get data from the previously sent command */ | |
a9de9248 | 1164 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1165 | { |
1166 | struct hci_command_hdr *hdr; | |
1167 | ||
1168 | if (!hdev->sent_cmd) | |
1169 | return NULL; | |
1170 | ||
1171 | hdr = (void *) hdev->sent_cmd->data; | |
1172 | ||
a9de9248 | 1173 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1174 | return NULL; |
1175 | ||
a9de9248 | 1176 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1177 | |
1178 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1179 | } | |
1180 | ||
1181 | /* Send ACL data */ | |
1182 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1183 | { | |
1184 | struct hci_acl_hdr *hdr; | |
1185 | int len = skb->len; | |
1186 | ||
badff6d0 ACM |
1187 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1188 | skb_reset_transport_header(skb); | |
9c70220b | 1189 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1190 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1191 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1192 | } |
1193 | ||
1194 | int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) | |
1195 | { | |
1196 | struct hci_dev *hdev = conn->hdev; | |
1197 | struct sk_buff *list; | |
1198 | ||
1199 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); | |
1200 | ||
1201 | skb->dev = (void *) hdev; | |
0d48d939 | 1202 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1203 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_START); |
1204 | ||
1205 | if (!(list = skb_shinfo(skb)->frag_list)) { | |
1206 | /* Non fragmented */ | |
1207 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1208 | ||
1209 | skb_queue_tail(&conn->data_q, skb); | |
1210 | } else { | |
1211 | /* Fragmented */ | |
1212 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1213 | ||
1214 | skb_shinfo(skb)->frag_list = NULL; | |
1215 | ||
1216 | /* Queue all fragments atomically */ | |
1217 | spin_lock_bh(&conn->data_q.lock); | |
1218 | ||
1219 | __skb_queue_tail(&conn->data_q, skb); | |
1220 | do { | |
1221 | skb = list; list = list->next; | |
8e87d142 | 1222 | |
1da177e4 | 1223 | skb->dev = (void *) hdev; |
0d48d939 | 1224 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1225 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT); |
1226 | ||
1227 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1228 | ||
1229 | __skb_queue_tail(&conn->data_q, skb); | |
1230 | } while (list); | |
1231 | ||
1232 | spin_unlock_bh(&conn->data_q.lock); | |
1233 | } | |
1234 | ||
1235 | hci_sched_tx(hdev); | |
1236 | return 0; | |
1237 | } | |
1238 | EXPORT_SYMBOL(hci_send_acl); | |
1239 | ||
1240 | /* Send SCO data */ | |
1241 | int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) | |
1242 | { | |
1243 | struct hci_dev *hdev = conn->hdev; | |
1244 | struct hci_sco_hdr hdr; | |
1245 | ||
1246 | BT_DBG("%s len %d", hdev->name, skb->len); | |
1247 | ||
1248 | if (skb->len > hdev->sco_mtu) { | |
1249 | kfree_skb(skb); | |
1250 | return -EINVAL; | |
1251 | } | |
1252 | ||
aca3192c | 1253 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
1254 | hdr.dlen = skb->len; |
1255 | ||
badff6d0 ACM |
1256 | skb_push(skb, HCI_SCO_HDR_SIZE); |
1257 | skb_reset_transport_header(skb); | |
9c70220b | 1258 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
1259 | |
1260 | skb->dev = (void *) hdev; | |
0d48d939 | 1261 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
1da177e4 LT |
1262 | skb_queue_tail(&conn->data_q, skb); |
1263 | hci_sched_tx(hdev); | |
1264 | return 0; | |
1265 | } | |
1266 | EXPORT_SYMBOL(hci_send_sco); | |
1267 | ||
1268 | /* ---- HCI TX task (outgoing data) ---- */ | |
1269 | ||
1270 | /* HCI Connection scheduler */ | |
1271 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
1272 | { | |
1273 | struct hci_conn_hash *h = &hdev->conn_hash; | |
5b7f9909 | 1274 | struct hci_conn *conn = NULL; |
1da177e4 LT |
1275 | int num = 0, min = ~0; |
1276 | struct list_head *p; | |
1277 | ||
8e87d142 | 1278 | /* We don't have to lock device here. Connections are always |
1da177e4 LT |
1279 | * added and removed with TX task disabled. */ |
1280 | list_for_each(p, &h->list) { | |
1281 | struct hci_conn *c; | |
1282 | c = list_entry(p, struct hci_conn, list); | |
1283 | ||
769be974 | 1284 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 1285 | continue; |
769be974 MH |
1286 | |
1287 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
1288 | continue; | |
1289 | ||
1da177e4 LT |
1290 | num++; |
1291 | ||
1292 | if (c->sent < min) { | |
1293 | min = c->sent; | |
1294 | conn = c; | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | if (conn) { | |
1299 | int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt); | |
1300 | int q = cnt / num; | |
1301 | *quote = q ? q : 1; | |
1302 | } else | |
1303 | *quote = 0; | |
1304 | ||
1305 | BT_DBG("conn %p quote %d", conn, *quote); | |
1306 | return conn; | |
1307 | } | |
1308 | ||
1309 | static inline void hci_acl_tx_to(struct hci_dev *hdev) | |
1310 | { | |
1311 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1312 | struct list_head *p; | |
1313 | struct hci_conn *c; | |
1314 | ||
1315 | BT_ERR("%s ACL tx timeout", hdev->name); | |
1316 | ||
1317 | /* Kill stalled connections */ | |
1318 | list_for_each(p, &h->list) { | |
1319 | c = list_entry(p, struct hci_conn, list); | |
1320 | if (c->type == ACL_LINK && c->sent) { | |
1321 | BT_ERR("%s killing stalled ACL connection %s", | |
1322 | hdev->name, batostr(&c->dst)); | |
1323 | hci_acl_disconn(c, 0x13); | |
1324 | } | |
1325 | } | |
1326 | } | |
1327 | ||
1328 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
1329 | { | |
1330 | struct hci_conn *conn; | |
1331 | struct sk_buff *skb; | |
1332 | int quote; | |
1333 | ||
1334 | BT_DBG("%s", hdev->name); | |
1335 | ||
1336 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1337 | /* ACL tx timeout must be longer than maximum | |
1338 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 1339 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
1da177e4 LT |
1340 | hci_acl_tx_to(hdev); |
1341 | } | |
1342 | ||
1343 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { | |
1344 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1345 | BT_DBG("skb %p len %d", skb, skb->len); | |
04837f64 MH |
1346 | |
1347 | hci_conn_enter_active_mode(conn); | |
1348 | ||
1da177e4 LT |
1349 | hci_send_frame(skb); |
1350 | hdev->acl_last_tx = jiffies; | |
1351 | ||
1352 | hdev->acl_cnt--; | |
1353 | conn->sent++; | |
1354 | } | |
1355 | } | |
1356 | } | |
1357 | ||
1358 | /* Schedule SCO */ | |
1359 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
1360 | { | |
1361 | struct hci_conn *conn; | |
1362 | struct sk_buff *skb; | |
1363 | int quote; | |
1364 | ||
1365 | BT_DBG("%s", hdev->name); | |
1366 | ||
1367 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { | |
1368 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1369 | BT_DBG("skb %p len %d", skb, skb->len); | |
1370 | hci_send_frame(skb); | |
1371 | ||
1372 | conn->sent++; | |
1373 | if (conn->sent == ~0) | |
1374 | conn->sent = 0; | |
1375 | } | |
1376 | } | |
1377 | } | |
1378 | ||
b6a0dc82 MH |
1379 | static inline void hci_sched_esco(struct hci_dev *hdev) |
1380 | { | |
1381 | struct hci_conn *conn; | |
1382 | struct sk_buff *skb; | |
1383 | int quote; | |
1384 | ||
1385 | BT_DBG("%s", hdev->name); | |
1386 | ||
1387 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { | |
1388 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1389 | BT_DBG("skb %p len %d", skb, skb->len); | |
1390 | hci_send_frame(skb); | |
1391 | ||
1392 | conn->sent++; | |
1393 | if (conn->sent == ~0) | |
1394 | conn->sent = 0; | |
1395 | } | |
1396 | } | |
1397 | } | |
1398 | ||
1da177e4 LT |
1399 | static void hci_tx_task(unsigned long arg) |
1400 | { | |
1401 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1402 | struct sk_buff *skb; | |
1403 | ||
1404 | read_lock(&hci_task_lock); | |
1405 | ||
1406 | BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt); | |
1407 | ||
1408 | /* Schedule queues and send stuff to HCI driver */ | |
1409 | ||
1410 | hci_sched_acl(hdev); | |
1411 | ||
1412 | hci_sched_sco(hdev); | |
1413 | ||
b6a0dc82 MH |
1414 | hci_sched_esco(hdev); |
1415 | ||
1da177e4 LT |
1416 | /* Send next queued raw (unknown type) packet */ |
1417 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
1418 | hci_send_frame(skb); | |
1419 | ||
1420 | read_unlock(&hci_task_lock); | |
1421 | } | |
1422 | ||
1423 | /* ----- HCI RX task (incoming data proccessing) ----- */ | |
1424 | ||
1425 | /* ACL data packet */ | |
1426 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1427 | { | |
1428 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
1429 | struct hci_conn *conn; | |
1430 | __u16 handle, flags; | |
1431 | ||
1432 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
1433 | ||
1434 | handle = __le16_to_cpu(hdr->handle); | |
1435 | flags = hci_flags(handle); | |
1436 | handle = hci_handle(handle); | |
1437 | ||
1438 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
1439 | ||
1440 | hdev->stat.acl_rx++; | |
1441 | ||
1442 | hci_dev_lock(hdev); | |
1443 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1444 | hci_dev_unlock(hdev); | |
8e87d142 | 1445 | |
1da177e4 LT |
1446 | if (conn) { |
1447 | register struct hci_proto *hp; | |
1448 | ||
04837f64 MH |
1449 | hci_conn_enter_active_mode(conn); |
1450 | ||
1da177e4 LT |
1451 | /* Send to upper protocol */ |
1452 | if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) { | |
1453 | hp->recv_acldata(conn, skb, flags); | |
1454 | return; | |
1455 | } | |
1456 | } else { | |
8e87d142 | 1457 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
1458 | hdev->name, handle); |
1459 | } | |
1460 | ||
1461 | kfree_skb(skb); | |
1462 | } | |
1463 | ||
1464 | /* SCO data packet */ | |
1465 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1466 | { | |
1467 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
1468 | struct hci_conn *conn; | |
1469 | __u16 handle; | |
1470 | ||
1471 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
1472 | ||
1473 | handle = __le16_to_cpu(hdr->handle); | |
1474 | ||
1475 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
1476 | ||
1477 | hdev->stat.sco_rx++; | |
1478 | ||
1479 | hci_dev_lock(hdev); | |
1480 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1481 | hci_dev_unlock(hdev); | |
1482 | ||
1483 | if (conn) { | |
1484 | register struct hci_proto *hp; | |
1485 | ||
1486 | /* Send to upper protocol */ | |
1487 | if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) { | |
1488 | hp->recv_scodata(conn, skb); | |
1489 | return; | |
1490 | } | |
1491 | } else { | |
8e87d142 | 1492 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
1493 | hdev->name, handle); |
1494 | } | |
1495 | ||
1496 | kfree_skb(skb); | |
1497 | } | |
1498 | ||
6516455d | 1499 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
1500 | { |
1501 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1502 | struct sk_buff *skb; | |
1503 | ||
1504 | BT_DBG("%s", hdev->name); | |
1505 | ||
1506 | read_lock(&hci_task_lock); | |
1507 | ||
1508 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
1509 | if (atomic_read(&hdev->promisc)) { | |
1510 | /* Send copy to the sockets */ | |
1511 | hci_send_to_sock(hdev, skb); | |
1512 | } | |
1513 | ||
1514 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
1515 | kfree_skb(skb); | |
1516 | continue; | |
1517 | } | |
1518 | ||
1519 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
1520 | /* Don't process data packets in this states. */ | |
0d48d939 | 1521 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1522 | case HCI_ACLDATA_PKT: |
1523 | case HCI_SCODATA_PKT: | |
1524 | kfree_skb(skb); | |
1525 | continue; | |
3ff50b79 | 1526 | } |
1da177e4 LT |
1527 | } |
1528 | ||
1529 | /* Process frame */ | |
0d48d939 | 1530 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1531 | case HCI_EVENT_PKT: |
1532 | hci_event_packet(hdev, skb); | |
1533 | break; | |
1534 | ||
1535 | case HCI_ACLDATA_PKT: | |
1536 | BT_DBG("%s ACL data packet", hdev->name); | |
1537 | hci_acldata_packet(hdev, skb); | |
1538 | break; | |
1539 | ||
1540 | case HCI_SCODATA_PKT: | |
1541 | BT_DBG("%s SCO data packet", hdev->name); | |
1542 | hci_scodata_packet(hdev, skb); | |
1543 | break; | |
1544 | ||
1545 | default: | |
1546 | kfree_skb(skb); | |
1547 | break; | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | read_unlock(&hci_task_lock); | |
1552 | } | |
1553 | ||
1554 | static void hci_cmd_task(unsigned long arg) | |
1555 | { | |
1556 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1557 | struct sk_buff *skb; | |
1558 | ||
1559 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
1560 | ||
82453021 | 1561 | if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) { |
1da177e4 LT |
1562 | BT_ERR("%s command tx timeout", hdev->name); |
1563 | atomic_set(&hdev->cmd_cnt, 1); | |
1564 | } | |
1565 | ||
1566 | /* Send queued commands */ | |
1567 | if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) { | |
1568 | if (hdev->sent_cmd) | |
1569 | kfree_skb(hdev->sent_cmd); | |
1570 | ||
1571 | if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) { | |
1572 | atomic_dec(&hdev->cmd_cnt); | |
1573 | hci_send_frame(skb); | |
1574 | hdev->cmd_last_tx = jiffies; | |
1575 | } else { | |
1576 | skb_queue_head(&hdev->cmd_q, skb); | |
1577 | hci_sched_cmd(hdev); | |
1578 | } | |
1579 | } | |
1580 | } |