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> | |
611b30f7 | 42 | #include <linux/rfkill.h> |
1da177e4 LT |
43 | #include <net/sock.h> |
44 | ||
45 | #include <asm/system.h> | |
46 | #include <asm/uaccess.h> | |
47 | #include <asm/unaligned.h> | |
48 | ||
49 | #include <net/bluetooth/bluetooth.h> | |
50 | #include <net/bluetooth/hci_core.h> | |
51 | ||
1da177e4 LT |
52 | static void hci_cmd_task(unsigned long arg); |
53 | static void hci_rx_task(unsigned long arg); | |
54 | static void hci_tx_task(unsigned long arg); | |
55 | static void hci_notify(struct hci_dev *hdev, int event); | |
56 | ||
57 | static DEFINE_RWLOCK(hci_task_lock); | |
58 | ||
59 | /* HCI device list */ | |
60 | LIST_HEAD(hci_dev_list); | |
61 | DEFINE_RWLOCK(hci_dev_list_lock); | |
62 | ||
63 | /* HCI callback list */ | |
64 | LIST_HEAD(hci_cb_list); | |
65 | DEFINE_RWLOCK(hci_cb_list_lock); | |
66 | ||
67 | /* HCI protocols */ | |
68 | #define HCI_MAX_PROTO 2 | |
69 | struct hci_proto *hci_proto[HCI_MAX_PROTO]; | |
70 | ||
71 | /* HCI notifiers list */ | |
e041c683 | 72 | static ATOMIC_NOTIFIER_HEAD(hci_notifier); |
1da177e4 LT |
73 | |
74 | /* ---- HCI notifications ---- */ | |
75 | ||
76 | int hci_register_notifier(struct notifier_block *nb) | |
77 | { | |
e041c683 | 78 | return atomic_notifier_chain_register(&hci_notifier, nb); |
1da177e4 LT |
79 | } |
80 | ||
81 | int hci_unregister_notifier(struct notifier_block *nb) | |
82 | { | |
e041c683 | 83 | return atomic_notifier_chain_unregister(&hci_notifier, nb); |
1da177e4 LT |
84 | } |
85 | ||
6516455d | 86 | static void hci_notify(struct hci_dev *hdev, int event) |
1da177e4 | 87 | { |
e041c683 | 88 | atomic_notifier_call_chain(&hci_notifier, event, hdev); |
1da177e4 LT |
89 | } |
90 | ||
91 | /* ---- HCI requests ---- */ | |
92 | ||
93 | void hci_req_complete(struct hci_dev *hdev, int result) | |
94 | { | |
95 | BT_DBG("%s result 0x%2.2x", hdev->name, result); | |
96 | ||
97 | if (hdev->req_status == HCI_REQ_PEND) { | |
98 | hdev->req_result = result; | |
99 | hdev->req_status = HCI_REQ_DONE; | |
100 | wake_up_interruptible(&hdev->req_wait_q); | |
101 | } | |
102 | } | |
103 | ||
104 | static void hci_req_cancel(struct hci_dev *hdev, int err) | |
105 | { | |
106 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
107 | ||
108 | if (hdev->req_status == HCI_REQ_PEND) { | |
109 | hdev->req_result = err; | |
110 | hdev->req_status = HCI_REQ_CANCELED; | |
111 | wake_up_interruptible(&hdev->req_wait_q); | |
112 | } | |
113 | } | |
114 | ||
115 | /* Execute request and wait for completion. */ | |
8e87d142 | 116 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
1da177e4 LT |
117 | unsigned long opt, __u32 timeout) |
118 | { | |
119 | DECLARE_WAITQUEUE(wait, current); | |
120 | int err = 0; | |
121 | ||
122 | BT_DBG("%s start", hdev->name); | |
123 | ||
124 | hdev->req_status = HCI_REQ_PEND; | |
125 | ||
126 | add_wait_queue(&hdev->req_wait_q, &wait); | |
127 | set_current_state(TASK_INTERRUPTIBLE); | |
128 | ||
129 | req(hdev, opt); | |
130 | schedule_timeout(timeout); | |
131 | ||
132 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
133 | ||
134 | if (signal_pending(current)) | |
135 | return -EINTR; | |
136 | ||
137 | switch (hdev->req_status) { | |
138 | case HCI_REQ_DONE: | |
139 | err = -bt_err(hdev->req_result); | |
140 | break; | |
141 | ||
142 | case HCI_REQ_CANCELED: | |
143 | err = -hdev->req_result; | |
144 | break; | |
145 | ||
146 | default: | |
147 | err = -ETIMEDOUT; | |
148 | break; | |
3ff50b79 | 149 | } |
1da177e4 LT |
150 | |
151 | hdev->req_status = hdev->req_result = 0; | |
152 | ||
153 | BT_DBG("%s end: err %d", hdev->name, err); | |
154 | ||
155 | return err; | |
156 | } | |
157 | ||
158 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), | |
159 | unsigned long opt, __u32 timeout) | |
160 | { | |
161 | int ret; | |
162 | ||
7c6a329e MH |
163 | if (!test_bit(HCI_UP, &hdev->flags)) |
164 | return -ENETDOWN; | |
165 | ||
1da177e4 LT |
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 */ | |
a9de9248 | 179 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
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; |
89f2783d | 186 | __u8 flt_type; |
1da177e4 LT |
187 | |
188 | BT_DBG("%s %ld", hdev->name, opt); | |
189 | ||
190 | /* Driver initialization */ | |
191 | ||
192 | /* Special commands */ | |
193 | while ((skb = skb_dequeue(&hdev->driver_init))) { | |
0d48d939 | 194 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 LT |
195 | skb->dev = (void *) hdev; |
196 | skb_queue_tail(&hdev->cmd_q, skb); | |
197 | hci_sched_cmd(hdev); | |
198 | } | |
199 | skb_queue_purge(&hdev->driver_init); | |
200 | ||
201 | /* Mandatory initialization */ | |
202 | ||
203 | /* Reset */ | |
7a9d4020 | 204 | if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) |
a9de9248 | 205 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
206 | |
207 | /* Read Local Supported Features */ | |
a9de9248 | 208 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
1da177e4 | 209 | |
1143e5a6 | 210 | /* Read Local Version */ |
a9de9248 | 211 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
1143e5a6 | 212 | |
1da177e4 | 213 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
a9de9248 | 214 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
1da177e4 LT |
215 | |
216 | #if 0 | |
217 | /* Host buffer size */ | |
218 | { | |
219 | struct hci_cp_host_buffer_size cp; | |
aca3192c | 220 | cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE); |
1da177e4 | 221 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
aca3192c YH |
222 | cp.acl_max_pkt = cpu_to_le16(0xffff); |
223 | cp.sco_max_pkt = cpu_to_le16(0xffff); | |
a9de9248 | 224 | hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
1da177e4 LT |
225 | } |
226 | #endif | |
227 | ||
228 | /* Read BD Address */ | |
a9de9248 MH |
229 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
230 | ||
231 | /* Read Class of Device */ | |
232 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); | |
233 | ||
234 | /* Read Local Name */ | |
235 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); | |
1da177e4 LT |
236 | |
237 | /* Read Voice Setting */ | |
a9de9248 | 238 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
1da177e4 LT |
239 | |
240 | /* Optional initialization */ | |
241 | ||
242 | /* Clear Event Filters */ | |
89f2783d | 243 | flt_type = HCI_FLT_CLEAR_ALL; |
a9de9248 | 244 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
1da177e4 LT |
245 | |
246 | /* Page timeout ~20 secs */ | |
aca3192c | 247 | param = cpu_to_le16(0x8000); |
a9de9248 | 248 | hci_send_cmd(hdev, HCI_OP_WRITE_PG_TIMEOUT, 2, ¶m); |
1da177e4 LT |
249 | |
250 | /* Connection accept timeout ~20 secs */ | |
aca3192c | 251 | param = cpu_to_le16(0x7d00); |
a9de9248 | 252 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
1da177e4 LT |
253 | } |
254 | ||
255 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) | |
256 | { | |
257 | __u8 scan = opt; | |
258 | ||
259 | BT_DBG("%s %x", hdev->name, scan); | |
260 | ||
261 | /* Inquiry and Page scans */ | |
a9de9248 | 262 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1da177e4 LT |
263 | } |
264 | ||
265 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
266 | { | |
267 | __u8 auth = opt; | |
268 | ||
269 | BT_DBG("%s %x", hdev->name, auth); | |
270 | ||
271 | /* Authentication */ | |
a9de9248 | 272 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
1da177e4 LT |
273 | } |
274 | ||
275 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
276 | { | |
277 | __u8 encrypt = opt; | |
278 | ||
279 | BT_DBG("%s %x", hdev->name, encrypt); | |
280 | ||
e4e8e37c | 281 | /* Encryption */ |
a9de9248 | 282 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
1da177e4 LT |
283 | } |
284 | ||
e4e8e37c MH |
285 | static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
286 | { | |
287 | __le16 policy = cpu_to_le16(opt); | |
288 | ||
a418b893 | 289 | BT_DBG("%s %x", hdev->name, policy); |
e4e8e37c MH |
290 | |
291 | /* Default link policy */ | |
292 | hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); | |
293 | } | |
294 | ||
8e87d142 | 295 | /* Get HCI device by index. |
1da177e4 LT |
296 | * Device is held on return. */ |
297 | struct hci_dev *hci_dev_get(int index) | |
298 | { | |
299 | struct hci_dev *hdev = NULL; | |
300 | struct list_head *p; | |
301 | ||
302 | BT_DBG("%d", index); | |
303 | ||
304 | if (index < 0) | |
305 | return NULL; | |
306 | ||
307 | read_lock(&hci_dev_list_lock); | |
308 | list_for_each(p, &hci_dev_list) { | |
309 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
310 | if (d->id == index) { | |
311 | hdev = hci_dev_hold(d); | |
312 | break; | |
313 | } | |
314 | } | |
315 | read_unlock(&hci_dev_list_lock); | |
316 | return hdev; | |
317 | } | |
1da177e4 LT |
318 | |
319 | /* ---- Inquiry support ---- */ | |
320 | static void inquiry_cache_flush(struct hci_dev *hdev) | |
321 | { | |
322 | struct inquiry_cache *cache = &hdev->inq_cache; | |
323 | struct inquiry_entry *next = cache->list, *e; | |
324 | ||
325 | BT_DBG("cache %p", cache); | |
326 | ||
327 | cache->list = NULL; | |
328 | while ((e = next)) { | |
329 | next = e->next; | |
330 | kfree(e); | |
331 | } | |
332 | } | |
333 | ||
334 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
335 | { | |
336 | struct inquiry_cache *cache = &hdev->inq_cache; | |
337 | struct inquiry_entry *e; | |
338 | ||
339 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
340 | ||
341 | for (e = cache->list; e; e = e->next) | |
342 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
343 | break; | |
344 | return e; | |
345 | } | |
346 | ||
347 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) | |
348 | { | |
349 | struct inquiry_cache *cache = &hdev->inq_cache; | |
350 | struct inquiry_entry *e; | |
351 | ||
352 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
353 | ||
354 | if (!(e = hci_inquiry_cache_lookup(hdev, &data->bdaddr))) { | |
355 | /* Entry not in the cache. Add new one. */ | |
25ea6db0 | 356 | if (!(e = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC))) |
1da177e4 | 357 | return; |
1da177e4 LT |
358 | e->next = cache->list; |
359 | cache->list = e; | |
360 | } | |
361 | ||
362 | memcpy(&e->data, data, sizeof(*data)); | |
363 | e->timestamp = jiffies; | |
364 | cache->timestamp = jiffies; | |
365 | } | |
366 | ||
367 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
368 | { | |
369 | struct inquiry_cache *cache = &hdev->inq_cache; | |
370 | struct inquiry_info *info = (struct inquiry_info *) buf; | |
371 | struct inquiry_entry *e; | |
372 | int copied = 0; | |
373 | ||
374 | for (e = cache->list; e && copied < num; e = e->next, copied++) { | |
375 | struct inquiry_data *data = &e->data; | |
376 | bacpy(&info->bdaddr, &data->bdaddr); | |
377 | info->pscan_rep_mode = data->pscan_rep_mode; | |
378 | info->pscan_period_mode = data->pscan_period_mode; | |
379 | info->pscan_mode = data->pscan_mode; | |
380 | memcpy(info->dev_class, data->dev_class, 3); | |
381 | info->clock_offset = data->clock_offset; | |
382 | info++; | |
383 | } | |
384 | ||
385 | BT_DBG("cache %p, copied %d", cache, copied); | |
386 | return copied; | |
387 | } | |
388 | ||
389 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
390 | { | |
391 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
392 | struct hci_cp_inquiry cp; | |
393 | ||
394 | BT_DBG("%s", hdev->name); | |
395 | ||
396 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
397 | return; | |
398 | ||
399 | /* Start Inquiry */ | |
400 | memcpy(&cp.lap, &ir->lap, 3); | |
401 | cp.length = ir->length; | |
402 | cp.num_rsp = ir->num_rsp; | |
a9de9248 | 403 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
1da177e4 LT |
404 | } |
405 | ||
406 | int hci_inquiry(void __user *arg) | |
407 | { | |
408 | __u8 __user *ptr = arg; | |
409 | struct hci_inquiry_req ir; | |
410 | struct hci_dev *hdev; | |
411 | int err = 0, do_inquiry = 0, max_rsp; | |
412 | long timeo; | |
413 | __u8 *buf; | |
414 | ||
415 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
416 | return -EFAULT; | |
417 | ||
418 | if (!(hdev = hci_dev_get(ir.dev_id))) | |
419 | return -ENODEV; | |
420 | ||
421 | hci_dev_lock_bh(hdev); | |
8e87d142 | 422 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
1da177e4 LT |
423 | inquiry_cache_empty(hdev) || |
424 | ir.flags & IREQ_CACHE_FLUSH) { | |
425 | inquiry_cache_flush(hdev); | |
426 | do_inquiry = 1; | |
427 | } | |
428 | hci_dev_unlock_bh(hdev); | |
429 | ||
04837f64 | 430 | timeo = ir.length * msecs_to_jiffies(2000); |
1da177e4 LT |
431 | if (do_inquiry && (err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo)) < 0) |
432 | goto done; | |
433 | ||
434 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
435 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
436 | ||
437 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
438 | * copy it to the user space. | |
439 | */ | |
440 | if (!(buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL))) { | |
441 | err = -ENOMEM; | |
442 | goto done; | |
443 | } | |
444 | ||
445 | hci_dev_lock_bh(hdev); | |
446 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); | |
447 | hci_dev_unlock_bh(hdev); | |
448 | ||
449 | BT_DBG("num_rsp %d", ir.num_rsp); | |
450 | ||
451 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
452 | ptr += sizeof(ir); | |
453 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
454 | ir.num_rsp)) | |
455 | err = -EFAULT; | |
8e87d142 | 456 | } else |
1da177e4 LT |
457 | err = -EFAULT; |
458 | ||
459 | kfree(buf); | |
460 | ||
461 | done: | |
462 | hci_dev_put(hdev); | |
463 | return err; | |
464 | } | |
465 | ||
466 | /* ---- HCI ioctl helpers ---- */ | |
467 | ||
468 | int hci_dev_open(__u16 dev) | |
469 | { | |
470 | struct hci_dev *hdev; | |
471 | int ret = 0; | |
472 | ||
473 | if (!(hdev = hci_dev_get(dev))) | |
474 | return -ENODEV; | |
475 | ||
476 | BT_DBG("%s %p", hdev->name, hdev); | |
477 | ||
478 | hci_req_lock(hdev); | |
479 | ||
611b30f7 MH |
480 | if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) { |
481 | ret = -ERFKILL; | |
482 | goto done; | |
483 | } | |
484 | ||
1da177e4 LT |
485 | if (test_bit(HCI_UP, &hdev->flags)) { |
486 | ret = -EALREADY; | |
487 | goto done; | |
488 | } | |
489 | ||
490 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
491 | set_bit(HCI_RAW, &hdev->flags); | |
492 | ||
493 | if (hdev->open(hdev)) { | |
494 | ret = -EIO; | |
495 | goto done; | |
496 | } | |
497 | ||
498 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
499 | atomic_set(&hdev->cmd_cnt, 1); | |
500 | set_bit(HCI_INIT, &hdev->flags); | |
501 | ||
502 | //__hci_request(hdev, hci_reset_req, 0, HZ); | |
04837f64 MH |
503 | ret = __hci_request(hdev, hci_init_req, 0, |
504 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
505 | |
506 | clear_bit(HCI_INIT, &hdev->flags); | |
507 | } | |
508 | ||
509 | if (!ret) { | |
510 | hci_dev_hold(hdev); | |
511 | set_bit(HCI_UP, &hdev->flags); | |
512 | hci_notify(hdev, HCI_DEV_UP); | |
8e87d142 | 513 | } else { |
1da177e4 LT |
514 | /* Init failed, cleanup */ |
515 | tasklet_kill(&hdev->rx_task); | |
516 | tasklet_kill(&hdev->tx_task); | |
517 | tasklet_kill(&hdev->cmd_task); | |
518 | ||
519 | skb_queue_purge(&hdev->cmd_q); | |
520 | skb_queue_purge(&hdev->rx_q); | |
521 | ||
522 | if (hdev->flush) | |
523 | hdev->flush(hdev); | |
524 | ||
525 | if (hdev->sent_cmd) { | |
526 | kfree_skb(hdev->sent_cmd); | |
527 | hdev->sent_cmd = NULL; | |
528 | } | |
529 | ||
530 | hdev->close(hdev); | |
531 | hdev->flags = 0; | |
532 | } | |
533 | ||
534 | done: | |
535 | hci_req_unlock(hdev); | |
536 | hci_dev_put(hdev); | |
537 | return ret; | |
538 | } | |
539 | ||
540 | static int hci_dev_do_close(struct hci_dev *hdev) | |
541 | { | |
542 | BT_DBG("%s %p", hdev->name, hdev); | |
543 | ||
544 | hci_req_cancel(hdev, ENODEV); | |
545 | hci_req_lock(hdev); | |
546 | ||
547 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
548 | hci_req_unlock(hdev); | |
549 | return 0; | |
550 | } | |
551 | ||
552 | /* Kill RX and TX tasks */ | |
553 | tasklet_kill(&hdev->rx_task); | |
554 | tasklet_kill(&hdev->tx_task); | |
555 | ||
556 | hci_dev_lock_bh(hdev); | |
557 | inquiry_cache_flush(hdev); | |
558 | hci_conn_hash_flush(hdev); | |
559 | hci_dev_unlock_bh(hdev); | |
560 | ||
561 | hci_notify(hdev, HCI_DEV_DOWN); | |
562 | ||
563 | if (hdev->flush) | |
564 | hdev->flush(hdev); | |
565 | ||
566 | /* Reset device */ | |
567 | skb_queue_purge(&hdev->cmd_q); | |
568 | atomic_set(&hdev->cmd_cnt, 1); | |
569 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
570 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 MH |
571 | __hci_request(hdev, hci_reset_req, 0, |
572 | msecs_to_jiffies(250)); | |
1da177e4 LT |
573 | clear_bit(HCI_INIT, &hdev->flags); |
574 | } | |
575 | ||
576 | /* Kill cmd task */ | |
577 | tasklet_kill(&hdev->cmd_task); | |
578 | ||
579 | /* Drop queues */ | |
580 | skb_queue_purge(&hdev->rx_q); | |
581 | skb_queue_purge(&hdev->cmd_q); | |
582 | skb_queue_purge(&hdev->raw_q); | |
583 | ||
584 | /* Drop last sent command */ | |
585 | if (hdev->sent_cmd) { | |
586 | kfree_skb(hdev->sent_cmd); | |
587 | hdev->sent_cmd = NULL; | |
588 | } | |
589 | ||
590 | /* After this point our queues are empty | |
591 | * and no tasks are scheduled. */ | |
592 | hdev->close(hdev); | |
593 | ||
594 | /* Clear flags */ | |
595 | hdev->flags = 0; | |
596 | ||
597 | hci_req_unlock(hdev); | |
598 | ||
599 | hci_dev_put(hdev); | |
600 | return 0; | |
601 | } | |
602 | ||
603 | int hci_dev_close(__u16 dev) | |
604 | { | |
605 | struct hci_dev *hdev; | |
606 | int err; | |
607 | ||
608 | if (!(hdev = hci_dev_get(dev))) | |
609 | return -ENODEV; | |
610 | err = hci_dev_do_close(hdev); | |
611 | hci_dev_put(hdev); | |
612 | return err; | |
613 | } | |
614 | ||
615 | int hci_dev_reset(__u16 dev) | |
616 | { | |
617 | struct hci_dev *hdev; | |
618 | int ret = 0; | |
619 | ||
620 | if (!(hdev = hci_dev_get(dev))) | |
621 | return -ENODEV; | |
622 | ||
623 | hci_req_lock(hdev); | |
624 | tasklet_disable(&hdev->tx_task); | |
625 | ||
626 | if (!test_bit(HCI_UP, &hdev->flags)) | |
627 | goto done; | |
628 | ||
629 | /* Drop queues */ | |
630 | skb_queue_purge(&hdev->rx_q); | |
631 | skb_queue_purge(&hdev->cmd_q); | |
632 | ||
633 | hci_dev_lock_bh(hdev); | |
634 | inquiry_cache_flush(hdev); | |
635 | hci_conn_hash_flush(hdev); | |
636 | hci_dev_unlock_bh(hdev); | |
637 | ||
638 | if (hdev->flush) | |
639 | hdev->flush(hdev); | |
640 | ||
8e87d142 | 641 | atomic_set(&hdev->cmd_cnt, 1); |
1da177e4 LT |
642 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; |
643 | ||
644 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
645 | ret = __hci_request(hdev, hci_reset_req, 0, |
646 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
647 | |
648 | done: | |
649 | tasklet_enable(&hdev->tx_task); | |
650 | hci_req_unlock(hdev); | |
651 | hci_dev_put(hdev); | |
652 | return ret; | |
653 | } | |
654 | ||
655 | int hci_dev_reset_stat(__u16 dev) | |
656 | { | |
657 | struct hci_dev *hdev; | |
658 | int ret = 0; | |
659 | ||
660 | if (!(hdev = hci_dev_get(dev))) | |
661 | return -ENODEV; | |
662 | ||
663 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
664 | ||
665 | hci_dev_put(hdev); | |
666 | ||
667 | return ret; | |
668 | } | |
669 | ||
670 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
671 | { | |
672 | struct hci_dev *hdev; | |
673 | struct hci_dev_req dr; | |
674 | int err = 0; | |
675 | ||
676 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
677 | return -EFAULT; | |
678 | ||
679 | if (!(hdev = hci_dev_get(dr.dev_id))) | |
680 | return -ENODEV; | |
681 | ||
682 | switch (cmd) { | |
683 | case HCISETAUTH: | |
04837f64 MH |
684 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
685 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
686 | break; |
687 | ||
688 | case HCISETENCRYPT: | |
689 | if (!lmp_encrypt_capable(hdev)) { | |
690 | err = -EOPNOTSUPP; | |
691 | break; | |
692 | } | |
693 | ||
694 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
695 | /* Auth must be enabled first */ | |
04837f64 MH |
696 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
697 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
698 | if (err) |
699 | break; | |
700 | } | |
701 | ||
04837f64 MH |
702 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
703 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
704 | break; |
705 | ||
706 | case HCISETSCAN: | |
04837f64 MH |
707 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
708 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
709 | break; |
710 | ||
1da177e4 | 711 | case HCISETLINKPOL: |
e4e8e37c MH |
712 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
713 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
714 | break; |
715 | ||
716 | case HCISETLINKMODE: | |
e4e8e37c MH |
717 | hdev->link_mode = ((__u16) dr.dev_opt) & |
718 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
719 | break; | |
720 | ||
721 | case HCISETPTYPE: | |
722 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
723 | break; |
724 | ||
725 | case HCISETACLMTU: | |
e4e8e37c MH |
726 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
727 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
728 | break; |
729 | ||
730 | case HCISETSCOMTU: | |
e4e8e37c MH |
731 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
732 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
733 | break; |
734 | ||
735 | default: | |
736 | err = -EINVAL; | |
737 | break; | |
738 | } | |
e4e8e37c | 739 | |
1da177e4 LT |
740 | hci_dev_put(hdev); |
741 | return err; | |
742 | } | |
743 | ||
744 | int hci_get_dev_list(void __user *arg) | |
745 | { | |
746 | struct hci_dev_list_req *dl; | |
747 | struct hci_dev_req *dr; | |
748 | struct list_head *p; | |
749 | int n = 0, size, err; | |
750 | __u16 dev_num; | |
751 | ||
752 | if (get_user(dev_num, (__u16 __user *) arg)) | |
753 | return -EFAULT; | |
754 | ||
755 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
756 | return -EINVAL; | |
757 | ||
758 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
759 | ||
c6bf514c | 760 | if (!(dl = kzalloc(size, GFP_KERNEL))) |
1da177e4 LT |
761 | return -ENOMEM; |
762 | ||
763 | dr = dl->dev_req; | |
764 | ||
765 | read_lock_bh(&hci_dev_list_lock); | |
766 | list_for_each(p, &hci_dev_list) { | |
767 | struct hci_dev *hdev; | |
768 | hdev = list_entry(p, struct hci_dev, list); | |
769 | (dr + n)->dev_id = hdev->id; | |
770 | (dr + n)->dev_opt = hdev->flags; | |
771 | if (++n >= dev_num) | |
772 | break; | |
773 | } | |
774 | read_unlock_bh(&hci_dev_list_lock); | |
775 | ||
776 | dl->dev_num = n; | |
777 | size = sizeof(*dl) + n * sizeof(*dr); | |
778 | ||
779 | err = copy_to_user(arg, dl, size); | |
780 | kfree(dl); | |
781 | ||
782 | return err ? -EFAULT : 0; | |
783 | } | |
784 | ||
785 | int hci_get_dev_info(void __user *arg) | |
786 | { | |
787 | struct hci_dev *hdev; | |
788 | struct hci_dev_info di; | |
789 | int err = 0; | |
790 | ||
791 | if (copy_from_user(&di, arg, sizeof(di))) | |
792 | return -EFAULT; | |
793 | ||
794 | if (!(hdev = hci_dev_get(di.dev_id))) | |
795 | return -ENODEV; | |
796 | ||
797 | strcpy(di.name, hdev->name); | |
798 | di.bdaddr = hdev->bdaddr; | |
799 | di.type = hdev->type; | |
800 | di.flags = hdev->flags; | |
801 | di.pkt_type = hdev->pkt_type; | |
802 | di.acl_mtu = hdev->acl_mtu; | |
803 | di.acl_pkts = hdev->acl_pkts; | |
804 | di.sco_mtu = hdev->sco_mtu; | |
805 | di.sco_pkts = hdev->sco_pkts; | |
806 | di.link_policy = hdev->link_policy; | |
807 | di.link_mode = hdev->link_mode; | |
808 | ||
809 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
810 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
811 | ||
812 | if (copy_to_user(arg, &di, sizeof(di))) | |
813 | err = -EFAULT; | |
814 | ||
815 | hci_dev_put(hdev); | |
816 | ||
817 | return err; | |
818 | } | |
819 | ||
820 | /* ---- Interface to HCI drivers ---- */ | |
821 | ||
611b30f7 MH |
822 | static int hci_rfkill_set_block(void *data, bool blocked) |
823 | { | |
824 | struct hci_dev *hdev = data; | |
825 | ||
826 | BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); | |
827 | ||
828 | if (!blocked) | |
829 | return 0; | |
830 | ||
831 | hci_dev_do_close(hdev); | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
836 | static const struct rfkill_ops hci_rfkill_ops = { | |
837 | .set_block = hci_rfkill_set_block, | |
838 | }; | |
839 | ||
1da177e4 LT |
840 | /* Alloc HCI device */ |
841 | struct hci_dev *hci_alloc_dev(void) | |
842 | { | |
843 | struct hci_dev *hdev; | |
844 | ||
25ea6db0 | 845 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
846 | if (!hdev) |
847 | return NULL; | |
848 | ||
1da177e4 LT |
849 | skb_queue_head_init(&hdev->driver_init); |
850 | ||
851 | return hdev; | |
852 | } | |
853 | EXPORT_SYMBOL(hci_alloc_dev); | |
854 | ||
855 | /* Free HCI device */ | |
856 | void hci_free_dev(struct hci_dev *hdev) | |
857 | { | |
858 | skb_queue_purge(&hdev->driver_init); | |
859 | ||
a91f2e39 MH |
860 | /* will free via device release */ |
861 | put_device(&hdev->dev); | |
1da177e4 LT |
862 | } |
863 | EXPORT_SYMBOL(hci_free_dev); | |
864 | ||
865 | /* Register HCI device */ | |
866 | int hci_register_dev(struct hci_dev *hdev) | |
867 | { | |
868 | struct list_head *head = &hci_dev_list, *p; | |
ef222013 | 869 | int i, id = 0; |
1da177e4 | 870 | |
611b30f7 MH |
871 | BT_DBG("%p name %s type %d owner %p", hdev, hdev->name, |
872 | hdev->type, hdev->owner); | |
1da177e4 LT |
873 | |
874 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
875 | return -EINVAL; | |
876 | ||
877 | write_lock_bh(&hci_dev_list_lock); | |
878 | ||
879 | /* Find first available device id */ | |
880 | list_for_each(p, &hci_dev_list) { | |
881 | if (list_entry(p, struct hci_dev, list)->id != id) | |
882 | break; | |
883 | head = p; id++; | |
884 | } | |
8e87d142 | 885 | |
1da177e4 LT |
886 | sprintf(hdev->name, "hci%d", id); |
887 | hdev->id = id; | |
888 | list_add(&hdev->list, head); | |
889 | ||
890 | atomic_set(&hdev->refcnt, 1); | |
891 | spin_lock_init(&hdev->lock); | |
892 | ||
893 | hdev->flags = 0; | |
894 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 895 | hdev->esco_type = (ESCO_HV1); |
1da177e4 LT |
896 | hdev->link_mode = (HCI_LM_ACCEPT); |
897 | ||
04837f64 MH |
898 | hdev->idle_timeout = 0; |
899 | hdev->sniff_max_interval = 800; | |
900 | hdev->sniff_min_interval = 80; | |
901 | ||
1da177e4 LT |
902 | tasklet_init(&hdev->cmd_task, hci_cmd_task,(unsigned long) hdev); |
903 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); | |
904 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
905 | ||
906 | skb_queue_head_init(&hdev->rx_q); | |
907 | skb_queue_head_init(&hdev->cmd_q); | |
908 | skb_queue_head_init(&hdev->raw_q); | |
909 | ||
ef222013 MH |
910 | for (i = 0; i < 3; i++) |
911 | hdev->reassembly[i] = NULL; | |
912 | ||
1da177e4 LT |
913 | init_waitqueue_head(&hdev->req_wait_q); |
914 | init_MUTEX(&hdev->req_lock); | |
915 | ||
916 | inquiry_cache_init(hdev); | |
917 | ||
918 | hci_conn_hash_init(hdev); | |
919 | ||
920 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
921 | ||
922 | atomic_set(&hdev->promisc, 0); | |
923 | ||
924 | write_unlock_bh(&hci_dev_list_lock); | |
925 | ||
926 | hci_register_sysfs(hdev); | |
927 | ||
611b30f7 MH |
928 | hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
929 | RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev); | |
930 | if (hdev->rfkill) { | |
931 | if (rfkill_register(hdev->rfkill) < 0) { | |
932 | rfkill_destroy(hdev->rfkill); | |
933 | hdev->rfkill = NULL; | |
934 | } | |
935 | } | |
936 | ||
1da177e4 LT |
937 | hci_notify(hdev, HCI_DEV_REG); |
938 | ||
939 | return id; | |
940 | } | |
941 | EXPORT_SYMBOL(hci_register_dev); | |
942 | ||
943 | /* Unregister HCI device */ | |
944 | int hci_unregister_dev(struct hci_dev *hdev) | |
945 | { | |
ef222013 MH |
946 | int i; |
947 | ||
1da177e4 LT |
948 | BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); |
949 | ||
1da177e4 LT |
950 | write_lock_bh(&hci_dev_list_lock); |
951 | list_del(&hdev->list); | |
952 | write_unlock_bh(&hci_dev_list_lock); | |
953 | ||
954 | hci_dev_do_close(hdev); | |
955 | ||
ef222013 MH |
956 | for (i = 0; i < 3; i++) |
957 | kfree_skb(hdev->reassembly[i]); | |
958 | ||
1da177e4 LT |
959 | hci_notify(hdev, HCI_DEV_UNREG); |
960 | ||
611b30f7 MH |
961 | if (hdev->rfkill) { |
962 | rfkill_unregister(hdev->rfkill); | |
963 | rfkill_destroy(hdev->rfkill); | |
964 | } | |
965 | ||
147e2d59 DY |
966 | hci_unregister_sysfs(hdev); |
967 | ||
1da177e4 | 968 | __hci_dev_put(hdev); |
ef222013 | 969 | |
1da177e4 LT |
970 | return 0; |
971 | } | |
972 | EXPORT_SYMBOL(hci_unregister_dev); | |
973 | ||
974 | /* Suspend HCI device */ | |
975 | int hci_suspend_dev(struct hci_dev *hdev) | |
976 | { | |
977 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
978 | return 0; | |
979 | } | |
980 | EXPORT_SYMBOL(hci_suspend_dev); | |
981 | ||
982 | /* Resume HCI device */ | |
983 | int hci_resume_dev(struct hci_dev *hdev) | |
984 | { | |
985 | hci_notify(hdev, HCI_DEV_RESUME); | |
986 | return 0; | |
987 | } | |
988 | EXPORT_SYMBOL(hci_resume_dev); | |
989 | ||
ef222013 MH |
990 | /* Receive packet type fragment */ |
991 | #define __reassembly(hdev, type) ((hdev)->reassembly[(type) - 2]) | |
992 | ||
993 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) | |
994 | { | |
995 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) | |
996 | return -EILSEQ; | |
997 | ||
998 | while (count) { | |
999 | struct sk_buff *skb = __reassembly(hdev, type); | |
1000 | struct { int expect; } *scb; | |
1001 | int len = 0; | |
1002 | ||
1003 | if (!skb) { | |
1004 | /* Start of the frame */ | |
1005 | ||
1006 | switch (type) { | |
1007 | case HCI_EVENT_PKT: | |
1008 | if (count >= HCI_EVENT_HDR_SIZE) { | |
1009 | struct hci_event_hdr *h = data; | |
1010 | len = HCI_EVENT_HDR_SIZE + h->plen; | |
1011 | } else | |
1012 | return -EILSEQ; | |
1013 | break; | |
1014 | ||
1015 | case HCI_ACLDATA_PKT: | |
1016 | if (count >= HCI_ACL_HDR_SIZE) { | |
1017 | struct hci_acl_hdr *h = data; | |
1018 | len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen); | |
1019 | } else | |
1020 | return -EILSEQ; | |
1021 | break; | |
1022 | ||
1023 | case HCI_SCODATA_PKT: | |
1024 | if (count >= HCI_SCO_HDR_SIZE) { | |
1025 | struct hci_sco_hdr *h = data; | |
1026 | len = HCI_SCO_HDR_SIZE + h->dlen; | |
1027 | } else | |
1028 | return -EILSEQ; | |
1029 | break; | |
1030 | } | |
1031 | ||
1032 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1033 | if (!skb) { | |
1034 | BT_ERR("%s no memory for packet", hdev->name); | |
1035 | return -ENOMEM; | |
1036 | } | |
1037 | ||
1038 | skb->dev = (void *) hdev; | |
1039 | bt_cb(skb)->pkt_type = type; | |
00ae02f3 | 1040 | |
ef222013 MH |
1041 | __reassembly(hdev, type) = skb; |
1042 | ||
1043 | scb = (void *) skb->cb; | |
1044 | scb->expect = len; | |
1045 | } else { | |
1046 | /* Continuation */ | |
1047 | ||
1048 | scb = (void *) skb->cb; | |
1049 | len = scb->expect; | |
1050 | } | |
1051 | ||
1052 | len = min(len, count); | |
1053 | ||
1054 | memcpy(skb_put(skb, len), data, len); | |
1055 | ||
1056 | scb->expect -= len; | |
1057 | ||
1058 | if (scb->expect == 0) { | |
1059 | /* Complete frame */ | |
1060 | ||
1061 | __reassembly(hdev, type) = NULL; | |
1062 | ||
1063 | bt_cb(skb)->pkt_type = type; | |
1064 | hci_recv_frame(skb); | |
1065 | } | |
1066 | ||
1067 | count -= len; data += len; | |
1068 | } | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | EXPORT_SYMBOL(hci_recv_fragment); | |
1073 | ||
1da177e4 LT |
1074 | /* ---- Interface to upper protocols ---- */ |
1075 | ||
1076 | /* Register/Unregister protocols. | |
1077 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1078 | int hci_register_proto(struct hci_proto *hp) | |
1079 | { | |
1080 | int err = 0; | |
1081 | ||
1082 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1083 | ||
1084 | if (hp->id >= HCI_MAX_PROTO) | |
1085 | return -EINVAL; | |
1086 | ||
1087 | write_lock_bh(&hci_task_lock); | |
1088 | ||
1089 | if (!hci_proto[hp->id]) | |
1090 | hci_proto[hp->id] = hp; | |
1091 | else | |
1092 | err = -EEXIST; | |
1093 | ||
1094 | write_unlock_bh(&hci_task_lock); | |
1095 | ||
1096 | return err; | |
1097 | } | |
1098 | EXPORT_SYMBOL(hci_register_proto); | |
1099 | ||
1100 | int hci_unregister_proto(struct hci_proto *hp) | |
1101 | { | |
1102 | int err = 0; | |
1103 | ||
1104 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1105 | ||
1106 | if (hp->id >= HCI_MAX_PROTO) | |
1107 | return -EINVAL; | |
1108 | ||
1109 | write_lock_bh(&hci_task_lock); | |
1110 | ||
1111 | if (hci_proto[hp->id]) | |
1112 | hci_proto[hp->id] = NULL; | |
1113 | else | |
1114 | err = -ENOENT; | |
1115 | ||
1116 | write_unlock_bh(&hci_task_lock); | |
1117 | ||
1118 | return err; | |
1119 | } | |
1120 | EXPORT_SYMBOL(hci_unregister_proto); | |
1121 | ||
1122 | int hci_register_cb(struct hci_cb *cb) | |
1123 | { | |
1124 | BT_DBG("%p name %s", cb, cb->name); | |
1125 | ||
1126 | write_lock_bh(&hci_cb_list_lock); | |
1127 | list_add(&cb->list, &hci_cb_list); | |
1128 | write_unlock_bh(&hci_cb_list_lock); | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | EXPORT_SYMBOL(hci_register_cb); | |
1133 | ||
1134 | int hci_unregister_cb(struct hci_cb *cb) | |
1135 | { | |
1136 | BT_DBG("%p name %s", cb, cb->name); | |
1137 | ||
1138 | write_lock_bh(&hci_cb_list_lock); | |
1139 | list_del(&cb->list); | |
1140 | write_unlock_bh(&hci_cb_list_lock); | |
1141 | ||
1142 | return 0; | |
1143 | } | |
1144 | EXPORT_SYMBOL(hci_unregister_cb); | |
1145 | ||
1146 | static int hci_send_frame(struct sk_buff *skb) | |
1147 | { | |
1148 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1149 | ||
1150 | if (!hdev) { | |
1151 | kfree_skb(skb); | |
1152 | return -ENODEV; | |
1153 | } | |
1154 | ||
0d48d939 | 1155 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1156 | |
1157 | if (atomic_read(&hdev->promisc)) { | |
1158 | /* Time stamp */ | |
a61bbcf2 | 1159 | __net_timestamp(skb); |
1da177e4 LT |
1160 | |
1161 | hci_send_to_sock(hdev, skb); | |
1162 | } | |
1163 | ||
1164 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1165 | skb_orphan(skb); | |
1166 | ||
1167 | return hdev->send(skb); | |
1168 | } | |
1169 | ||
1170 | /* Send HCI command */ | |
a9de9248 | 1171 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1172 | { |
1173 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1174 | struct hci_command_hdr *hdr; | |
1175 | struct sk_buff *skb; | |
1176 | ||
a9de9248 | 1177 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1178 | |
1179 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1180 | if (!skb) { | |
ef222013 | 1181 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1182 | return -ENOMEM; |
1183 | } | |
1184 | ||
1185 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1186 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1187 | hdr->plen = plen; |
1188 | ||
1189 | if (plen) | |
1190 | memcpy(skb_put(skb, plen), param, plen); | |
1191 | ||
1192 | BT_DBG("skb len %d", skb->len); | |
1193 | ||
0d48d939 | 1194 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 LT |
1195 | skb->dev = (void *) hdev; |
1196 | skb_queue_tail(&hdev->cmd_q, skb); | |
1197 | hci_sched_cmd(hdev); | |
1198 | ||
1199 | return 0; | |
1200 | } | |
1da177e4 LT |
1201 | |
1202 | /* Get data from the previously sent command */ | |
a9de9248 | 1203 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1204 | { |
1205 | struct hci_command_hdr *hdr; | |
1206 | ||
1207 | if (!hdev->sent_cmd) | |
1208 | return NULL; | |
1209 | ||
1210 | hdr = (void *) hdev->sent_cmd->data; | |
1211 | ||
a9de9248 | 1212 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1213 | return NULL; |
1214 | ||
a9de9248 | 1215 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1216 | |
1217 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1218 | } | |
1219 | ||
1220 | /* Send ACL data */ | |
1221 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1222 | { | |
1223 | struct hci_acl_hdr *hdr; | |
1224 | int len = skb->len; | |
1225 | ||
badff6d0 ACM |
1226 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1227 | skb_reset_transport_header(skb); | |
9c70220b | 1228 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1229 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1230 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) | |
1234 | { | |
1235 | struct hci_dev *hdev = conn->hdev; | |
1236 | struct sk_buff *list; | |
1237 | ||
1238 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); | |
1239 | ||
1240 | skb->dev = (void *) hdev; | |
0d48d939 | 1241 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1242 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_START); |
1243 | ||
1244 | if (!(list = skb_shinfo(skb)->frag_list)) { | |
1245 | /* Non fragmented */ | |
1246 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1247 | ||
1248 | skb_queue_tail(&conn->data_q, skb); | |
1249 | } else { | |
1250 | /* Fragmented */ | |
1251 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1252 | ||
1253 | skb_shinfo(skb)->frag_list = NULL; | |
1254 | ||
1255 | /* Queue all fragments atomically */ | |
1256 | spin_lock_bh(&conn->data_q.lock); | |
1257 | ||
1258 | __skb_queue_tail(&conn->data_q, skb); | |
1259 | do { | |
1260 | skb = list; list = list->next; | |
8e87d142 | 1261 | |
1da177e4 | 1262 | skb->dev = (void *) hdev; |
0d48d939 | 1263 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1264 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT); |
1265 | ||
1266 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1267 | ||
1268 | __skb_queue_tail(&conn->data_q, skb); | |
1269 | } while (list); | |
1270 | ||
1271 | spin_unlock_bh(&conn->data_q.lock); | |
1272 | } | |
1273 | ||
1274 | hci_sched_tx(hdev); | |
1275 | return 0; | |
1276 | } | |
1277 | EXPORT_SYMBOL(hci_send_acl); | |
1278 | ||
1279 | /* Send SCO data */ | |
1280 | int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) | |
1281 | { | |
1282 | struct hci_dev *hdev = conn->hdev; | |
1283 | struct hci_sco_hdr hdr; | |
1284 | ||
1285 | BT_DBG("%s len %d", hdev->name, skb->len); | |
1286 | ||
1287 | if (skb->len > hdev->sco_mtu) { | |
1288 | kfree_skb(skb); | |
1289 | return -EINVAL; | |
1290 | } | |
1291 | ||
aca3192c | 1292 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
1293 | hdr.dlen = skb->len; |
1294 | ||
badff6d0 ACM |
1295 | skb_push(skb, HCI_SCO_HDR_SIZE); |
1296 | skb_reset_transport_header(skb); | |
9c70220b | 1297 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
1298 | |
1299 | skb->dev = (void *) hdev; | |
0d48d939 | 1300 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
1da177e4 LT |
1301 | skb_queue_tail(&conn->data_q, skb); |
1302 | hci_sched_tx(hdev); | |
1303 | return 0; | |
1304 | } | |
1305 | EXPORT_SYMBOL(hci_send_sco); | |
1306 | ||
1307 | /* ---- HCI TX task (outgoing data) ---- */ | |
1308 | ||
1309 | /* HCI Connection scheduler */ | |
1310 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
1311 | { | |
1312 | struct hci_conn_hash *h = &hdev->conn_hash; | |
5b7f9909 | 1313 | struct hci_conn *conn = NULL; |
1da177e4 LT |
1314 | int num = 0, min = ~0; |
1315 | struct list_head *p; | |
1316 | ||
8e87d142 | 1317 | /* We don't have to lock device here. Connections are always |
1da177e4 LT |
1318 | * added and removed with TX task disabled. */ |
1319 | list_for_each(p, &h->list) { | |
1320 | struct hci_conn *c; | |
1321 | c = list_entry(p, struct hci_conn, list); | |
1322 | ||
769be974 | 1323 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 1324 | continue; |
769be974 MH |
1325 | |
1326 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
1327 | continue; | |
1328 | ||
1da177e4 LT |
1329 | num++; |
1330 | ||
1331 | if (c->sent < min) { | |
1332 | min = c->sent; | |
1333 | conn = c; | |
1334 | } | |
1335 | } | |
1336 | ||
1337 | if (conn) { | |
1338 | int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt); | |
1339 | int q = cnt / num; | |
1340 | *quote = q ? q : 1; | |
1341 | } else | |
1342 | *quote = 0; | |
1343 | ||
1344 | BT_DBG("conn %p quote %d", conn, *quote); | |
1345 | return conn; | |
1346 | } | |
1347 | ||
1348 | static inline void hci_acl_tx_to(struct hci_dev *hdev) | |
1349 | { | |
1350 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1351 | struct list_head *p; | |
1352 | struct hci_conn *c; | |
1353 | ||
1354 | BT_ERR("%s ACL tx timeout", hdev->name); | |
1355 | ||
1356 | /* Kill stalled connections */ | |
1357 | list_for_each(p, &h->list) { | |
1358 | c = list_entry(p, struct hci_conn, list); | |
1359 | if (c->type == ACL_LINK && c->sent) { | |
1360 | BT_ERR("%s killing stalled ACL connection %s", | |
1361 | hdev->name, batostr(&c->dst)); | |
1362 | hci_acl_disconn(c, 0x13); | |
1363 | } | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
1368 | { | |
1369 | struct hci_conn *conn; | |
1370 | struct sk_buff *skb; | |
1371 | int quote; | |
1372 | ||
1373 | BT_DBG("%s", hdev->name); | |
1374 | ||
1375 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1376 | /* ACL tx timeout must be longer than maximum | |
1377 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 1378 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
1da177e4 LT |
1379 | hci_acl_tx_to(hdev); |
1380 | } | |
1381 | ||
1382 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { | |
1383 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1384 | BT_DBG("skb %p len %d", skb, skb->len); | |
04837f64 MH |
1385 | |
1386 | hci_conn_enter_active_mode(conn); | |
1387 | ||
1da177e4 LT |
1388 | hci_send_frame(skb); |
1389 | hdev->acl_last_tx = jiffies; | |
1390 | ||
1391 | hdev->acl_cnt--; | |
1392 | conn->sent++; | |
1393 | } | |
1394 | } | |
1395 | } | |
1396 | ||
1397 | /* Schedule SCO */ | |
1398 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
1399 | { | |
1400 | struct hci_conn *conn; | |
1401 | struct sk_buff *skb; | |
1402 | int quote; | |
1403 | ||
1404 | BT_DBG("%s", hdev->name); | |
1405 | ||
1406 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { | |
1407 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1408 | BT_DBG("skb %p len %d", skb, skb->len); | |
1409 | hci_send_frame(skb); | |
1410 | ||
1411 | conn->sent++; | |
1412 | if (conn->sent == ~0) | |
1413 | conn->sent = 0; | |
1414 | } | |
1415 | } | |
1416 | } | |
1417 | ||
b6a0dc82 MH |
1418 | static inline void hci_sched_esco(struct hci_dev *hdev) |
1419 | { | |
1420 | struct hci_conn *conn; | |
1421 | struct sk_buff *skb; | |
1422 | int quote; | |
1423 | ||
1424 | BT_DBG("%s", hdev->name); | |
1425 | ||
1426 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { | |
1427 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1428 | BT_DBG("skb %p len %d", skb, skb->len); | |
1429 | hci_send_frame(skb); | |
1430 | ||
1431 | conn->sent++; | |
1432 | if (conn->sent == ~0) | |
1433 | conn->sent = 0; | |
1434 | } | |
1435 | } | |
1436 | } | |
1437 | ||
1da177e4 LT |
1438 | static void hci_tx_task(unsigned long arg) |
1439 | { | |
1440 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1441 | struct sk_buff *skb; | |
1442 | ||
1443 | read_lock(&hci_task_lock); | |
1444 | ||
1445 | BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt); | |
1446 | ||
1447 | /* Schedule queues and send stuff to HCI driver */ | |
1448 | ||
1449 | hci_sched_acl(hdev); | |
1450 | ||
1451 | hci_sched_sco(hdev); | |
1452 | ||
b6a0dc82 MH |
1453 | hci_sched_esco(hdev); |
1454 | ||
1da177e4 LT |
1455 | /* Send next queued raw (unknown type) packet */ |
1456 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
1457 | hci_send_frame(skb); | |
1458 | ||
1459 | read_unlock(&hci_task_lock); | |
1460 | } | |
1461 | ||
1462 | /* ----- HCI RX task (incoming data proccessing) ----- */ | |
1463 | ||
1464 | /* ACL data packet */ | |
1465 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1466 | { | |
1467 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
1468 | struct hci_conn *conn; | |
1469 | __u16 handle, flags; | |
1470 | ||
1471 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
1472 | ||
1473 | handle = __le16_to_cpu(hdr->handle); | |
1474 | flags = hci_flags(handle); | |
1475 | handle = hci_handle(handle); | |
1476 | ||
1477 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
1478 | ||
1479 | hdev->stat.acl_rx++; | |
1480 | ||
1481 | hci_dev_lock(hdev); | |
1482 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1483 | hci_dev_unlock(hdev); | |
8e87d142 | 1484 | |
1da177e4 LT |
1485 | if (conn) { |
1486 | register struct hci_proto *hp; | |
1487 | ||
04837f64 MH |
1488 | hci_conn_enter_active_mode(conn); |
1489 | ||
1da177e4 LT |
1490 | /* Send to upper protocol */ |
1491 | if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) { | |
1492 | hp->recv_acldata(conn, skb, flags); | |
1493 | return; | |
1494 | } | |
1495 | } else { | |
8e87d142 | 1496 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
1497 | hdev->name, handle); |
1498 | } | |
1499 | ||
1500 | kfree_skb(skb); | |
1501 | } | |
1502 | ||
1503 | /* SCO data packet */ | |
1504 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1505 | { | |
1506 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
1507 | struct hci_conn *conn; | |
1508 | __u16 handle; | |
1509 | ||
1510 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
1511 | ||
1512 | handle = __le16_to_cpu(hdr->handle); | |
1513 | ||
1514 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
1515 | ||
1516 | hdev->stat.sco_rx++; | |
1517 | ||
1518 | hci_dev_lock(hdev); | |
1519 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1520 | hci_dev_unlock(hdev); | |
1521 | ||
1522 | if (conn) { | |
1523 | register struct hci_proto *hp; | |
1524 | ||
1525 | /* Send to upper protocol */ | |
1526 | if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) { | |
1527 | hp->recv_scodata(conn, skb); | |
1528 | return; | |
1529 | } | |
1530 | } else { | |
8e87d142 | 1531 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
1532 | hdev->name, handle); |
1533 | } | |
1534 | ||
1535 | kfree_skb(skb); | |
1536 | } | |
1537 | ||
6516455d | 1538 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
1539 | { |
1540 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1541 | struct sk_buff *skb; | |
1542 | ||
1543 | BT_DBG("%s", hdev->name); | |
1544 | ||
1545 | read_lock(&hci_task_lock); | |
1546 | ||
1547 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
1548 | if (atomic_read(&hdev->promisc)) { | |
1549 | /* Send copy to the sockets */ | |
1550 | hci_send_to_sock(hdev, skb); | |
1551 | } | |
1552 | ||
1553 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
1554 | kfree_skb(skb); | |
1555 | continue; | |
1556 | } | |
1557 | ||
1558 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
1559 | /* Don't process data packets in this states. */ | |
0d48d939 | 1560 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1561 | case HCI_ACLDATA_PKT: |
1562 | case HCI_SCODATA_PKT: | |
1563 | kfree_skb(skb); | |
1564 | continue; | |
3ff50b79 | 1565 | } |
1da177e4 LT |
1566 | } |
1567 | ||
1568 | /* Process frame */ | |
0d48d939 | 1569 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1570 | case HCI_EVENT_PKT: |
1571 | hci_event_packet(hdev, skb); | |
1572 | break; | |
1573 | ||
1574 | case HCI_ACLDATA_PKT: | |
1575 | BT_DBG("%s ACL data packet", hdev->name); | |
1576 | hci_acldata_packet(hdev, skb); | |
1577 | break; | |
1578 | ||
1579 | case HCI_SCODATA_PKT: | |
1580 | BT_DBG("%s SCO data packet", hdev->name); | |
1581 | hci_scodata_packet(hdev, skb); | |
1582 | break; | |
1583 | ||
1584 | default: | |
1585 | kfree_skb(skb); | |
1586 | break; | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | read_unlock(&hci_task_lock); | |
1591 | } | |
1592 | ||
1593 | static void hci_cmd_task(unsigned long arg) | |
1594 | { | |
1595 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1596 | struct sk_buff *skb; | |
1597 | ||
1598 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
1599 | ||
82453021 | 1600 | if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) { |
1da177e4 LT |
1601 | BT_ERR("%s command tx timeout", hdev->name); |
1602 | atomic_set(&hdev->cmd_cnt, 1); | |
1603 | } | |
1604 | ||
1605 | /* Send queued commands */ | |
1606 | if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) { | |
7585b97a | 1607 | kfree_skb(hdev->sent_cmd); |
1da177e4 LT |
1608 | |
1609 | if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) { | |
1610 | atomic_dec(&hdev->cmd_cnt); | |
1611 | hci_send_frame(skb); | |
1612 | hdev->cmd_last_tx = jiffies; | |
1613 | } else { | |
1614 | skb_queue_head(&hdev->cmd_q, skb); | |
1615 | hci_sched_cmd(hdev); | |
1616 | } | |
1617 | } | |
1618 | } |