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 | ||
51 | #ifndef CONFIG_BT_HCI_CORE_DEBUG | |
52 | #undef BT_DBG | |
53 | #define BT_DBG(D...) | |
54 | #endif | |
55 | ||
56 | static void hci_cmd_task(unsigned long arg); | |
57 | static void hci_rx_task(unsigned long arg); | |
58 | static void hci_tx_task(unsigned long arg); | |
59 | static void hci_notify(struct hci_dev *hdev, int event); | |
60 | ||
61 | static DEFINE_RWLOCK(hci_task_lock); | |
62 | ||
63 | /* HCI device list */ | |
64 | LIST_HEAD(hci_dev_list); | |
65 | DEFINE_RWLOCK(hci_dev_list_lock); | |
66 | ||
67 | /* HCI callback list */ | |
68 | LIST_HEAD(hci_cb_list); | |
69 | DEFINE_RWLOCK(hci_cb_list_lock); | |
70 | ||
71 | /* HCI protocols */ | |
72 | #define HCI_MAX_PROTO 2 | |
73 | struct hci_proto *hci_proto[HCI_MAX_PROTO]; | |
74 | ||
75 | /* HCI notifiers list */ | |
e041c683 | 76 | static ATOMIC_NOTIFIER_HEAD(hci_notifier); |
1da177e4 LT |
77 | |
78 | /* ---- HCI notifications ---- */ | |
79 | ||
80 | int hci_register_notifier(struct notifier_block *nb) | |
81 | { | |
e041c683 | 82 | return atomic_notifier_chain_register(&hci_notifier, nb); |
1da177e4 LT |
83 | } |
84 | ||
85 | int hci_unregister_notifier(struct notifier_block *nb) | |
86 | { | |
e041c683 | 87 | return atomic_notifier_chain_unregister(&hci_notifier, nb); |
1da177e4 LT |
88 | } |
89 | ||
6516455d | 90 | static void hci_notify(struct hci_dev *hdev, int event) |
1da177e4 | 91 | { |
e041c683 | 92 | atomic_notifier_call_chain(&hci_notifier, event, hdev); |
1da177e4 LT |
93 | } |
94 | ||
95 | /* ---- HCI requests ---- */ | |
96 | ||
97 | void hci_req_complete(struct hci_dev *hdev, int result) | |
98 | { | |
99 | BT_DBG("%s result 0x%2.2x", hdev->name, result); | |
100 | ||
101 | if (hdev->req_status == HCI_REQ_PEND) { | |
102 | hdev->req_result = result; | |
103 | hdev->req_status = HCI_REQ_DONE; | |
104 | wake_up_interruptible(&hdev->req_wait_q); | |
105 | } | |
106 | } | |
107 | ||
108 | static void hci_req_cancel(struct hci_dev *hdev, int err) | |
109 | { | |
110 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
111 | ||
112 | if (hdev->req_status == HCI_REQ_PEND) { | |
113 | hdev->req_result = err; | |
114 | hdev->req_status = HCI_REQ_CANCELED; | |
115 | wake_up_interruptible(&hdev->req_wait_q); | |
116 | } | |
117 | } | |
118 | ||
119 | /* Execute request and wait for completion. */ | |
8e87d142 | 120 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
1da177e4 LT |
121 | unsigned long opt, __u32 timeout) |
122 | { | |
123 | DECLARE_WAITQUEUE(wait, current); | |
124 | int err = 0; | |
125 | ||
126 | BT_DBG("%s start", hdev->name); | |
127 | ||
128 | hdev->req_status = HCI_REQ_PEND; | |
129 | ||
130 | add_wait_queue(&hdev->req_wait_q, &wait); | |
131 | set_current_state(TASK_INTERRUPTIBLE); | |
132 | ||
133 | req(hdev, opt); | |
134 | schedule_timeout(timeout); | |
135 | ||
136 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
137 | ||
138 | if (signal_pending(current)) | |
139 | return -EINTR; | |
140 | ||
141 | switch (hdev->req_status) { | |
142 | case HCI_REQ_DONE: | |
143 | err = -bt_err(hdev->req_result); | |
144 | break; | |
145 | ||
146 | case HCI_REQ_CANCELED: | |
147 | err = -hdev->req_result; | |
148 | break; | |
149 | ||
150 | default: | |
151 | err = -ETIMEDOUT; | |
152 | break; | |
3ff50b79 | 153 | } |
1da177e4 LT |
154 | |
155 | hdev->req_status = hdev->req_result = 0; | |
156 | ||
157 | BT_DBG("%s end: err %d", hdev->name, err); | |
158 | ||
159 | return err; | |
160 | } | |
161 | ||
162 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), | |
163 | unsigned long opt, __u32 timeout) | |
164 | { | |
165 | int ret; | |
166 | ||
167 | /* Serialize all requests */ | |
168 | hci_req_lock(hdev); | |
169 | ret = __hci_request(hdev, req, opt, timeout); | |
170 | hci_req_unlock(hdev); | |
171 | ||
172 | return ret; | |
173 | } | |
174 | ||
175 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) | |
176 | { | |
177 | BT_DBG("%s %ld", hdev->name, opt); | |
178 | ||
179 | /* Reset device */ | |
a9de9248 | 180 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
181 | } |
182 | ||
183 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) | |
184 | { | |
185 | struct sk_buff *skb; | |
1ebb9252 | 186 | __le16 param; |
89f2783d | 187 | __u8 flt_type; |
1da177e4 LT |
188 | |
189 | BT_DBG("%s %ld", hdev->name, opt); | |
190 | ||
191 | /* Driver initialization */ | |
192 | ||
193 | /* Special commands */ | |
194 | while ((skb = skb_dequeue(&hdev->driver_init))) { | |
0d48d939 | 195 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 LT |
196 | skb->dev = (void *) hdev; |
197 | skb_queue_tail(&hdev->cmd_q, skb); | |
198 | hci_sched_cmd(hdev); | |
199 | } | |
200 | skb_queue_purge(&hdev->driver_init); | |
201 | ||
202 | /* Mandatory initialization */ | |
203 | ||
204 | /* Reset */ | |
205 | if (test_bit(HCI_QUIRK_RESET_ON_INIT, &hdev->quirks)) | |
a9de9248 | 206 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
207 | |
208 | /* Read Local Supported Features */ | |
a9de9248 | 209 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
1da177e4 | 210 | |
1143e5a6 | 211 | /* Read Local Version */ |
a9de9248 | 212 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
1143e5a6 | 213 | |
1da177e4 | 214 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
a9de9248 | 215 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
1da177e4 LT |
216 | |
217 | #if 0 | |
218 | /* Host buffer size */ | |
219 | { | |
220 | struct hci_cp_host_buffer_size cp; | |
aca3192c | 221 | cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE); |
1da177e4 | 222 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
aca3192c YH |
223 | cp.acl_max_pkt = cpu_to_le16(0xffff); |
224 | cp.sco_max_pkt = cpu_to_le16(0xffff); | |
a9de9248 | 225 | hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
1da177e4 LT |
226 | } |
227 | #endif | |
228 | ||
229 | /* Read BD Address */ | |
a9de9248 MH |
230 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
231 | ||
232 | /* Read Class of Device */ | |
233 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); | |
234 | ||
235 | /* Read Local Name */ | |
236 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); | |
1da177e4 LT |
237 | |
238 | /* Read Voice Setting */ | |
a9de9248 | 239 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
1da177e4 LT |
240 | |
241 | /* Optional initialization */ | |
242 | ||
243 | /* Clear Event Filters */ | |
89f2783d | 244 | flt_type = HCI_FLT_CLEAR_ALL; |
a9de9248 | 245 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
1da177e4 LT |
246 | |
247 | /* Page timeout ~20 secs */ | |
aca3192c | 248 | param = cpu_to_le16(0x8000); |
a9de9248 | 249 | hci_send_cmd(hdev, HCI_OP_WRITE_PG_TIMEOUT, 2, ¶m); |
1da177e4 LT |
250 | |
251 | /* Connection accept timeout ~20 secs */ | |
aca3192c | 252 | param = cpu_to_le16(0x7d00); |
a9de9248 | 253 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
1da177e4 LT |
254 | } |
255 | ||
256 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) | |
257 | { | |
258 | __u8 scan = opt; | |
259 | ||
260 | BT_DBG("%s %x", hdev->name, scan); | |
261 | ||
262 | /* Inquiry and Page scans */ | |
a9de9248 | 263 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1da177e4 LT |
264 | } |
265 | ||
266 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
267 | { | |
268 | __u8 auth = opt; | |
269 | ||
270 | BT_DBG("%s %x", hdev->name, auth); | |
271 | ||
272 | /* Authentication */ | |
a9de9248 | 273 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
1da177e4 LT |
274 | } |
275 | ||
276 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
277 | { | |
278 | __u8 encrypt = opt; | |
279 | ||
280 | BT_DBG("%s %x", hdev->name, encrypt); | |
281 | ||
282 | /* Authentication */ | |
a9de9248 | 283 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
1da177e4 LT |
284 | } |
285 | ||
8e87d142 | 286 | /* Get HCI device by index. |
1da177e4 LT |
287 | * Device is held on return. */ |
288 | struct hci_dev *hci_dev_get(int index) | |
289 | { | |
290 | struct hci_dev *hdev = NULL; | |
291 | struct list_head *p; | |
292 | ||
293 | BT_DBG("%d", index); | |
294 | ||
295 | if (index < 0) | |
296 | return NULL; | |
297 | ||
298 | read_lock(&hci_dev_list_lock); | |
299 | list_for_each(p, &hci_dev_list) { | |
300 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
301 | if (d->id == index) { | |
302 | hdev = hci_dev_hold(d); | |
303 | break; | |
304 | } | |
305 | } | |
306 | read_unlock(&hci_dev_list_lock); | |
307 | return hdev; | |
308 | } | |
1da177e4 LT |
309 | |
310 | /* ---- Inquiry support ---- */ | |
311 | static void inquiry_cache_flush(struct hci_dev *hdev) | |
312 | { | |
313 | struct inquiry_cache *cache = &hdev->inq_cache; | |
314 | struct inquiry_entry *next = cache->list, *e; | |
315 | ||
316 | BT_DBG("cache %p", cache); | |
317 | ||
318 | cache->list = NULL; | |
319 | while ((e = next)) { | |
320 | next = e->next; | |
321 | kfree(e); | |
322 | } | |
323 | } | |
324 | ||
325 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
326 | { | |
327 | struct inquiry_cache *cache = &hdev->inq_cache; | |
328 | struct inquiry_entry *e; | |
329 | ||
330 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
331 | ||
332 | for (e = cache->list; e; e = e->next) | |
333 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
334 | break; | |
335 | return e; | |
336 | } | |
337 | ||
338 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) | |
339 | { | |
340 | struct inquiry_cache *cache = &hdev->inq_cache; | |
341 | struct inquiry_entry *e; | |
342 | ||
343 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
344 | ||
345 | if (!(e = hci_inquiry_cache_lookup(hdev, &data->bdaddr))) { | |
346 | /* Entry not in the cache. Add new one. */ | |
25ea6db0 | 347 | if (!(e = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC))) |
1da177e4 | 348 | return; |
1da177e4 LT |
349 | e->next = cache->list; |
350 | cache->list = e; | |
351 | } | |
352 | ||
353 | memcpy(&e->data, data, sizeof(*data)); | |
354 | e->timestamp = jiffies; | |
355 | cache->timestamp = jiffies; | |
356 | } | |
357 | ||
358 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
359 | { | |
360 | struct inquiry_cache *cache = &hdev->inq_cache; | |
361 | struct inquiry_info *info = (struct inquiry_info *) buf; | |
362 | struct inquiry_entry *e; | |
363 | int copied = 0; | |
364 | ||
365 | for (e = cache->list; e && copied < num; e = e->next, copied++) { | |
366 | struct inquiry_data *data = &e->data; | |
367 | bacpy(&info->bdaddr, &data->bdaddr); | |
368 | info->pscan_rep_mode = data->pscan_rep_mode; | |
369 | info->pscan_period_mode = data->pscan_period_mode; | |
370 | info->pscan_mode = data->pscan_mode; | |
371 | memcpy(info->dev_class, data->dev_class, 3); | |
372 | info->clock_offset = data->clock_offset; | |
373 | info++; | |
374 | } | |
375 | ||
376 | BT_DBG("cache %p, copied %d", cache, copied); | |
377 | return copied; | |
378 | } | |
379 | ||
380 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
381 | { | |
382 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
383 | struct hci_cp_inquiry cp; | |
384 | ||
385 | BT_DBG("%s", hdev->name); | |
386 | ||
387 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
388 | return; | |
389 | ||
390 | /* Start Inquiry */ | |
391 | memcpy(&cp.lap, &ir->lap, 3); | |
392 | cp.length = ir->length; | |
393 | cp.num_rsp = ir->num_rsp; | |
a9de9248 | 394 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
1da177e4 LT |
395 | } |
396 | ||
397 | int hci_inquiry(void __user *arg) | |
398 | { | |
399 | __u8 __user *ptr = arg; | |
400 | struct hci_inquiry_req ir; | |
401 | struct hci_dev *hdev; | |
402 | int err = 0, do_inquiry = 0, max_rsp; | |
403 | long timeo; | |
404 | __u8 *buf; | |
405 | ||
406 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
407 | return -EFAULT; | |
408 | ||
409 | if (!(hdev = hci_dev_get(ir.dev_id))) | |
410 | return -ENODEV; | |
411 | ||
412 | hci_dev_lock_bh(hdev); | |
8e87d142 | 413 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
1da177e4 LT |
414 | inquiry_cache_empty(hdev) || |
415 | ir.flags & IREQ_CACHE_FLUSH) { | |
416 | inquiry_cache_flush(hdev); | |
417 | do_inquiry = 1; | |
418 | } | |
419 | hci_dev_unlock_bh(hdev); | |
420 | ||
04837f64 | 421 | timeo = ir.length * msecs_to_jiffies(2000); |
1da177e4 LT |
422 | if (do_inquiry && (err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo)) < 0) |
423 | goto done; | |
424 | ||
425 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
426 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
427 | ||
428 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
429 | * copy it to the user space. | |
430 | */ | |
431 | if (!(buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL))) { | |
432 | err = -ENOMEM; | |
433 | goto done; | |
434 | } | |
435 | ||
436 | hci_dev_lock_bh(hdev); | |
437 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); | |
438 | hci_dev_unlock_bh(hdev); | |
439 | ||
440 | BT_DBG("num_rsp %d", ir.num_rsp); | |
441 | ||
442 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
443 | ptr += sizeof(ir); | |
444 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
445 | ir.num_rsp)) | |
446 | err = -EFAULT; | |
8e87d142 | 447 | } else |
1da177e4 LT |
448 | err = -EFAULT; |
449 | ||
450 | kfree(buf); | |
451 | ||
452 | done: | |
453 | hci_dev_put(hdev); | |
454 | return err; | |
455 | } | |
456 | ||
457 | /* ---- HCI ioctl helpers ---- */ | |
458 | ||
459 | int hci_dev_open(__u16 dev) | |
460 | { | |
461 | struct hci_dev *hdev; | |
462 | int ret = 0; | |
463 | ||
464 | if (!(hdev = hci_dev_get(dev))) | |
465 | return -ENODEV; | |
466 | ||
467 | BT_DBG("%s %p", hdev->name, hdev); | |
468 | ||
469 | hci_req_lock(hdev); | |
470 | ||
471 | if (test_bit(HCI_UP, &hdev->flags)) { | |
472 | ret = -EALREADY; | |
473 | goto done; | |
474 | } | |
475 | ||
476 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
477 | set_bit(HCI_RAW, &hdev->flags); | |
478 | ||
479 | if (hdev->open(hdev)) { | |
480 | ret = -EIO; | |
481 | goto done; | |
482 | } | |
483 | ||
484 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
485 | atomic_set(&hdev->cmd_cnt, 1); | |
486 | set_bit(HCI_INIT, &hdev->flags); | |
487 | ||
488 | //__hci_request(hdev, hci_reset_req, 0, HZ); | |
04837f64 MH |
489 | ret = __hci_request(hdev, hci_init_req, 0, |
490 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
491 | |
492 | clear_bit(HCI_INIT, &hdev->flags); | |
493 | } | |
494 | ||
495 | if (!ret) { | |
496 | hci_dev_hold(hdev); | |
497 | set_bit(HCI_UP, &hdev->flags); | |
498 | hci_notify(hdev, HCI_DEV_UP); | |
8e87d142 | 499 | } else { |
1da177e4 LT |
500 | /* Init failed, cleanup */ |
501 | tasklet_kill(&hdev->rx_task); | |
502 | tasklet_kill(&hdev->tx_task); | |
503 | tasklet_kill(&hdev->cmd_task); | |
504 | ||
505 | skb_queue_purge(&hdev->cmd_q); | |
506 | skb_queue_purge(&hdev->rx_q); | |
507 | ||
508 | if (hdev->flush) | |
509 | hdev->flush(hdev); | |
510 | ||
511 | if (hdev->sent_cmd) { | |
512 | kfree_skb(hdev->sent_cmd); | |
513 | hdev->sent_cmd = NULL; | |
514 | } | |
515 | ||
516 | hdev->close(hdev); | |
517 | hdev->flags = 0; | |
518 | } | |
519 | ||
520 | done: | |
521 | hci_req_unlock(hdev); | |
522 | hci_dev_put(hdev); | |
523 | return ret; | |
524 | } | |
525 | ||
526 | static int hci_dev_do_close(struct hci_dev *hdev) | |
527 | { | |
528 | BT_DBG("%s %p", hdev->name, hdev); | |
529 | ||
530 | hci_req_cancel(hdev, ENODEV); | |
531 | hci_req_lock(hdev); | |
532 | ||
533 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
534 | hci_req_unlock(hdev); | |
535 | return 0; | |
536 | } | |
537 | ||
538 | /* Kill RX and TX tasks */ | |
539 | tasklet_kill(&hdev->rx_task); | |
540 | tasklet_kill(&hdev->tx_task); | |
541 | ||
542 | hci_dev_lock_bh(hdev); | |
543 | inquiry_cache_flush(hdev); | |
544 | hci_conn_hash_flush(hdev); | |
545 | hci_dev_unlock_bh(hdev); | |
546 | ||
547 | hci_notify(hdev, HCI_DEV_DOWN); | |
548 | ||
549 | if (hdev->flush) | |
550 | hdev->flush(hdev); | |
551 | ||
552 | /* Reset device */ | |
553 | skb_queue_purge(&hdev->cmd_q); | |
554 | atomic_set(&hdev->cmd_cnt, 1); | |
555 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
556 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 MH |
557 | __hci_request(hdev, hci_reset_req, 0, |
558 | msecs_to_jiffies(250)); | |
1da177e4 LT |
559 | clear_bit(HCI_INIT, &hdev->flags); |
560 | } | |
561 | ||
562 | /* Kill cmd task */ | |
563 | tasklet_kill(&hdev->cmd_task); | |
564 | ||
565 | /* Drop queues */ | |
566 | skb_queue_purge(&hdev->rx_q); | |
567 | skb_queue_purge(&hdev->cmd_q); | |
568 | skb_queue_purge(&hdev->raw_q); | |
569 | ||
570 | /* Drop last sent command */ | |
571 | if (hdev->sent_cmd) { | |
572 | kfree_skb(hdev->sent_cmd); | |
573 | hdev->sent_cmd = NULL; | |
574 | } | |
575 | ||
576 | /* After this point our queues are empty | |
577 | * and no tasks are scheduled. */ | |
578 | hdev->close(hdev); | |
579 | ||
580 | /* Clear flags */ | |
581 | hdev->flags = 0; | |
582 | ||
583 | hci_req_unlock(hdev); | |
584 | ||
585 | hci_dev_put(hdev); | |
586 | return 0; | |
587 | } | |
588 | ||
589 | int hci_dev_close(__u16 dev) | |
590 | { | |
591 | struct hci_dev *hdev; | |
592 | int err; | |
593 | ||
594 | if (!(hdev = hci_dev_get(dev))) | |
595 | return -ENODEV; | |
596 | err = hci_dev_do_close(hdev); | |
597 | hci_dev_put(hdev); | |
598 | return err; | |
599 | } | |
600 | ||
601 | int hci_dev_reset(__u16 dev) | |
602 | { | |
603 | struct hci_dev *hdev; | |
604 | int ret = 0; | |
605 | ||
606 | if (!(hdev = hci_dev_get(dev))) | |
607 | return -ENODEV; | |
608 | ||
609 | hci_req_lock(hdev); | |
610 | tasklet_disable(&hdev->tx_task); | |
611 | ||
612 | if (!test_bit(HCI_UP, &hdev->flags)) | |
613 | goto done; | |
614 | ||
615 | /* Drop queues */ | |
616 | skb_queue_purge(&hdev->rx_q); | |
617 | skb_queue_purge(&hdev->cmd_q); | |
618 | ||
619 | hci_dev_lock_bh(hdev); | |
620 | inquiry_cache_flush(hdev); | |
621 | hci_conn_hash_flush(hdev); | |
622 | hci_dev_unlock_bh(hdev); | |
623 | ||
624 | if (hdev->flush) | |
625 | hdev->flush(hdev); | |
626 | ||
8e87d142 | 627 | atomic_set(&hdev->cmd_cnt, 1); |
1da177e4 LT |
628 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; |
629 | ||
630 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
631 | ret = __hci_request(hdev, hci_reset_req, 0, |
632 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
633 | |
634 | done: | |
635 | tasklet_enable(&hdev->tx_task); | |
636 | hci_req_unlock(hdev); | |
637 | hci_dev_put(hdev); | |
638 | return ret; | |
639 | } | |
640 | ||
641 | int hci_dev_reset_stat(__u16 dev) | |
642 | { | |
643 | struct hci_dev *hdev; | |
644 | int ret = 0; | |
645 | ||
646 | if (!(hdev = hci_dev_get(dev))) | |
647 | return -ENODEV; | |
648 | ||
649 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
650 | ||
651 | hci_dev_put(hdev); | |
652 | ||
653 | return ret; | |
654 | } | |
655 | ||
656 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
657 | { | |
658 | struct hci_dev *hdev; | |
659 | struct hci_dev_req dr; | |
660 | int err = 0; | |
661 | ||
662 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
663 | return -EFAULT; | |
664 | ||
665 | if (!(hdev = hci_dev_get(dr.dev_id))) | |
666 | return -ENODEV; | |
667 | ||
668 | switch (cmd) { | |
669 | case HCISETAUTH: | |
04837f64 MH |
670 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
671 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
672 | break; |
673 | ||
674 | case HCISETENCRYPT: | |
675 | if (!lmp_encrypt_capable(hdev)) { | |
676 | err = -EOPNOTSUPP; | |
677 | break; | |
678 | } | |
679 | ||
680 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
681 | /* Auth must be enabled first */ | |
04837f64 MH |
682 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
683 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
684 | if (err) |
685 | break; | |
686 | } | |
687 | ||
04837f64 MH |
688 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
689 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
690 | break; |
691 | ||
692 | case HCISETSCAN: | |
04837f64 MH |
693 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
694 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
695 | break; |
696 | ||
697 | case HCISETPTYPE: | |
698 | hdev->pkt_type = (__u16) dr.dev_opt; | |
699 | break; | |
700 | ||
701 | case HCISETLINKPOL: | |
702 | hdev->link_policy = (__u16) dr.dev_opt; | |
703 | break; | |
704 | ||
705 | case HCISETLINKMODE: | |
706 | hdev->link_mode = ((__u16) dr.dev_opt) & (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
707 | break; | |
708 | ||
709 | case HCISETACLMTU: | |
710 | hdev->acl_mtu = *((__u16 *)&dr.dev_opt + 1); | |
711 | hdev->acl_pkts = *((__u16 *)&dr.dev_opt + 0); | |
712 | break; | |
713 | ||
714 | case HCISETSCOMTU: | |
715 | hdev->sco_mtu = *((__u16 *)&dr.dev_opt + 1); | |
716 | hdev->sco_pkts = *((__u16 *)&dr.dev_opt + 0); | |
717 | break; | |
718 | ||
719 | default: | |
720 | err = -EINVAL; | |
721 | break; | |
722 | } | |
723 | hci_dev_put(hdev); | |
724 | return err; | |
725 | } | |
726 | ||
727 | int hci_get_dev_list(void __user *arg) | |
728 | { | |
729 | struct hci_dev_list_req *dl; | |
730 | struct hci_dev_req *dr; | |
731 | struct list_head *p; | |
732 | int n = 0, size, err; | |
733 | __u16 dev_num; | |
734 | ||
735 | if (get_user(dev_num, (__u16 __user *) arg)) | |
736 | return -EFAULT; | |
737 | ||
738 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
739 | return -EINVAL; | |
740 | ||
741 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
742 | ||
743 | if (!(dl = kmalloc(size, GFP_KERNEL))) | |
744 | return -ENOMEM; | |
745 | ||
746 | dr = dl->dev_req; | |
747 | ||
748 | read_lock_bh(&hci_dev_list_lock); | |
749 | list_for_each(p, &hci_dev_list) { | |
750 | struct hci_dev *hdev; | |
751 | hdev = list_entry(p, struct hci_dev, list); | |
752 | (dr + n)->dev_id = hdev->id; | |
753 | (dr + n)->dev_opt = hdev->flags; | |
754 | if (++n >= dev_num) | |
755 | break; | |
756 | } | |
757 | read_unlock_bh(&hci_dev_list_lock); | |
758 | ||
759 | dl->dev_num = n; | |
760 | size = sizeof(*dl) + n * sizeof(*dr); | |
761 | ||
762 | err = copy_to_user(arg, dl, size); | |
763 | kfree(dl); | |
764 | ||
765 | return err ? -EFAULT : 0; | |
766 | } | |
767 | ||
768 | int hci_get_dev_info(void __user *arg) | |
769 | { | |
770 | struct hci_dev *hdev; | |
771 | struct hci_dev_info di; | |
772 | int err = 0; | |
773 | ||
774 | if (copy_from_user(&di, arg, sizeof(di))) | |
775 | return -EFAULT; | |
776 | ||
777 | if (!(hdev = hci_dev_get(di.dev_id))) | |
778 | return -ENODEV; | |
779 | ||
780 | strcpy(di.name, hdev->name); | |
781 | di.bdaddr = hdev->bdaddr; | |
782 | di.type = hdev->type; | |
783 | di.flags = hdev->flags; | |
784 | di.pkt_type = hdev->pkt_type; | |
785 | di.acl_mtu = hdev->acl_mtu; | |
786 | di.acl_pkts = hdev->acl_pkts; | |
787 | di.sco_mtu = hdev->sco_mtu; | |
788 | di.sco_pkts = hdev->sco_pkts; | |
789 | di.link_policy = hdev->link_policy; | |
790 | di.link_mode = hdev->link_mode; | |
791 | ||
792 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
793 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
794 | ||
795 | if (copy_to_user(arg, &di, sizeof(di))) | |
796 | err = -EFAULT; | |
797 | ||
798 | hci_dev_put(hdev); | |
799 | ||
800 | return err; | |
801 | } | |
802 | ||
803 | /* ---- Interface to HCI drivers ---- */ | |
804 | ||
805 | /* Alloc HCI device */ | |
806 | struct hci_dev *hci_alloc_dev(void) | |
807 | { | |
808 | struct hci_dev *hdev; | |
809 | ||
25ea6db0 | 810 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
811 | if (!hdev) |
812 | return NULL; | |
813 | ||
1da177e4 LT |
814 | skb_queue_head_init(&hdev->driver_init); |
815 | ||
816 | return hdev; | |
817 | } | |
818 | EXPORT_SYMBOL(hci_alloc_dev); | |
819 | ||
820 | /* Free HCI device */ | |
821 | void hci_free_dev(struct hci_dev *hdev) | |
822 | { | |
823 | skb_queue_purge(&hdev->driver_init); | |
824 | ||
a91f2e39 MH |
825 | /* will free via device release */ |
826 | put_device(&hdev->dev); | |
1da177e4 LT |
827 | } |
828 | EXPORT_SYMBOL(hci_free_dev); | |
829 | ||
830 | /* Register HCI device */ | |
831 | int hci_register_dev(struct hci_dev *hdev) | |
832 | { | |
833 | struct list_head *head = &hci_dev_list, *p; | |
ef222013 | 834 | int i, id = 0; |
1da177e4 LT |
835 | |
836 | BT_DBG("%p name %s type %d owner %p", hdev, hdev->name, hdev->type, hdev->owner); | |
837 | ||
838 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
839 | return -EINVAL; | |
840 | ||
841 | write_lock_bh(&hci_dev_list_lock); | |
842 | ||
843 | /* Find first available device id */ | |
844 | list_for_each(p, &hci_dev_list) { | |
845 | if (list_entry(p, struct hci_dev, list)->id != id) | |
846 | break; | |
847 | head = p; id++; | |
848 | } | |
8e87d142 | 849 | |
1da177e4 LT |
850 | sprintf(hdev->name, "hci%d", id); |
851 | hdev->id = id; | |
852 | list_add(&hdev->list, head); | |
853 | ||
854 | atomic_set(&hdev->refcnt, 1); | |
855 | spin_lock_init(&hdev->lock); | |
856 | ||
857 | hdev->flags = 0; | |
858 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 859 | hdev->esco_type = (ESCO_HV1); |
1da177e4 LT |
860 | hdev->link_mode = (HCI_LM_ACCEPT); |
861 | ||
04837f64 MH |
862 | hdev->idle_timeout = 0; |
863 | hdev->sniff_max_interval = 800; | |
864 | hdev->sniff_min_interval = 80; | |
865 | ||
1da177e4 LT |
866 | tasklet_init(&hdev->cmd_task, hci_cmd_task,(unsigned long) hdev); |
867 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); | |
868 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
869 | ||
870 | skb_queue_head_init(&hdev->rx_q); | |
871 | skb_queue_head_init(&hdev->cmd_q); | |
872 | skb_queue_head_init(&hdev->raw_q); | |
873 | ||
ef222013 MH |
874 | for (i = 0; i < 3; i++) |
875 | hdev->reassembly[i] = NULL; | |
876 | ||
1da177e4 LT |
877 | init_waitqueue_head(&hdev->req_wait_q); |
878 | init_MUTEX(&hdev->req_lock); | |
879 | ||
880 | inquiry_cache_init(hdev); | |
881 | ||
882 | hci_conn_hash_init(hdev); | |
883 | ||
884 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
885 | ||
886 | atomic_set(&hdev->promisc, 0); | |
887 | ||
888 | write_unlock_bh(&hci_dev_list_lock); | |
889 | ||
890 | hci_register_sysfs(hdev); | |
891 | ||
892 | hci_notify(hdev, HCI_DEV_REG); | |
893 | ||
894 | return id; | |
895 | } | |
896 | EXPORT_SYMBOL(hci_register_dev); | |
897 | ||
898 | /* Unregister HCI device */ | |
899 | int hci_unregister_dev(struct hci_dev *hdev) | |
900 | { | |
ef222013 MH |
901 | int i; |
902 | ||
1da177e4 LT |
903 | BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); |
904 | ||
1da177e4 LT |
905 | write_lock_bh(&hci_dev_list_lock); |
906 | list_del(&hdev->list); | |
907 | write_unlock_bh(&hci_dev_list_lock); | |
908 | ||
909 | hci_dev_do_close(hdev); | |
910 | ||
ef222013 MH |
911 | for (i = 0; i < 3; i++) |
912 | kfree_skb(hdev->reassembly[i]); | |
913 | ||
1da177e4 LT |
914 | hci_notify(hdev, HCI_DEV_UNREG); |
915 | ||
147e2d59 DY |
916 | hci_unregister_sysfs(hdev); |
917 | ||
1da177e4 | 918 | __hci_dev_put(hdev); |
ef222013 | 919 | |
1da177e4 LT |
920 | return 0; |
921 | } | |
922 | EXPORT_SYMBOL(hci_unregister_dev); | |
923 | ||
924 | /* Suspend HCI device */ | |
925 | int hci_suspend_dev(struct hci_dev *hdev) | |
926 | { | |
927 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
928 | return 0; | |
929 | } | |
930 | EXPORT_SYMBOL(hci_suspend_dev); | |
931 | ||
932 | /* Resume HCI device */ | |
933 | int hci_resume_dev(struct hci_dev *hdev) | |
934 | { | |
935 | hci_notify(hdev, HCI_DEV_RESUME); | |
936 | return 0; | |
937 | } | |
938 | EXPORT_SYMBOL(hci_resume_dev); | |
939 | ||
ef222013 MH |
940 | /* Receive packet type fragment */ |
941 | #define __reassembly(hdev, type) ((hdev)->reassembly[(type) - 2]) | |
942 | ||
943 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) | |
944 | { | |
945 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) | |
946 | return -EILSEQ; | |
947 | ||
948 | while (count) { | |
949 | struct sk_buff *skb = __reassembly(hdev, type); | |
950 | struct { int expect; } *scb; | |
951 | int len = 0; | |
952 | ||
953 | if (!skb) { | |
954 | /* Start of the frame */ | |
955 | ||
956 | switch (type) { | |
957 | case HCI_EVENT_PKT: | |
958 | if (count >= HCI_EVENT_HDR_SIZE) { | |
959 | struct hci_event_hdr *h = data; | |
960 | len = HCI_EVENT_HDR_SIZE + h->plen; | |
961 | } else | |
962 | return -EILSEQ; | |
963 | break; | |
964 | ||
965 | case HCI_ACLDATA_PKT: | |
966 | if (count >= HCI_ACL_HDR_SIZE) { | |
967 | struct hci_acl_hdr *h = data; | |
968 | len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen); | |
969 | } else | |
970 | return -EILSEQ; | |
971 | break; | |
972 | ||
973 | case HCI_SCODATA_PKT: | |
974 | if (count >= HCI_SCO_HDR_SIZE) { | |
975 | struct hci_sco_hdr *h = data; | |
976 | len = HCI_SCO_HDR_SIZE + h->dlen; | |
977 | } else | |
978 | return -EILSEQ; | |
979 | break; | |
980 | } | |
981 | ||
982 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
983 | if (!skb) { | |
984 | BT_ERR("%s no memory for packet", hdev->name); | |
985 | return -ENOMEM; | |
986 | } | |
987 | ||
988 | skb->dev = (void *) hdev; | |
989 | bt_cb(skb)->pkt_type = type; | |
00ae02f3 | 990 | |
ef222013 MH |
991 | __reassembly(hdev, type) = skb; |
992 | ||
993 | scb = (void *) skb->cb; | |
994 | scb->expect = len; | |
995 | } else { | |
996 | /* Continuation */ | |
997 | ||
998 | scb = (void *) skb->cb; | |
999 | len = scb->expect; | |
1000 | } | |
1001 | ||
1002 | len = min(len, count); | |
1003 | ||
1004 | memcpy(skb_put(skb, len), data, len); | |
1005 | ||
1006 | scb->expect -= len; | |
1007 | ||
1008 | if (scb->expect == 0) { | |
1009 | /* Complete frame */ | |
1010 | ||
1011 | __reassembly(hdev, type) = NULL; | |
1012 | ||
1013 | bt_cb(skb)->pkt_type = type; | |
1014 | hci_recv_frame(skb); | |
1015 | } | |
1016 | ||
1017 | count -= len; data += len; | |
1018 | } | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | EXPORT_SYMBOL(hci_recv_fragment); | |
1023 | ||
1da177e4 LT |
1024 | /* ---- Interface to upper protocols ---- */ |
1025 | ||
1026 | /* Register/Unregister protocols. | |
1027 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1028 | int hci_register_proto(struct hci_proto *hp) | |
1029 | { | |
1030 | int err = 0; | |
1031 | ||
1032 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1033 | ||
1034 | if (hp->id >= HCI_MAX_PROTO) | |
1035 | return -EINVAL; | |
1036 | ||
1037 | write_lock_bh(&hci_task_lock); | |
1038 | ||
1039 | if (!hci_proto[hp->id]) | |
1040 | hci_proto[hp->id] = hp; | |
1041 | else | |
1042 | err = -EEXIST; | |
1043 | ||
1044 | write_unlock_bh(&hci_task_lock); | |
1045 | ||
1046 | return err; | |
1047 | } | |
1048 | EXPORT_SYMBOL(hci_register_proto); | |
1049 | ||
1050 | int hci_unregister_proto(struct hci_proto *hp) | |
1051 | { | |
1052 | int err = 0; | |
1053 | ||
1054 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1055 | ||
1056 | if (hp->id >= HCI_MAX_PROTO) | |
1057 | return -EINVAL; | |
1058 | ||
1059 | write_lock_bh(&hci_task_lock); | |
1060 | ||
1061 | if (hci_proto[hp->id]) | |
1062 | hci_proto[hp->id] = NULL; | |
1063 | else | |
1064 | err = -ENOENT; | |
1065 | ||
1066 | write_unlock_bh(&hci_task_lock); | |
1067 | ||
1068 | return err; | |
1069 | } | |
1070 | EXPORT_SYMBOL(hci_unregister_proto); | |
1071 | ||
1072 | int hci_register_cb(struct hci_cb *cb) | |
1073 | { | |
1074 | BT_DBG("%p name %s", cb, cb->name); | |
1075 | ||
1076 | write_lock_bh(&hci_cb_list_lock); | |
1077 | list_add(&cb->list, &hci_cb_list); | |
1078 | write_unlock_bh(&hci_cb_list_lock); | |
1079 | ||
1080 | return 0; | |
1081 | } | |
1082 | EXPORT_SYMBOL(hci_register_cb); | |
1083 | ||
1084 | int hci_unregister_cb(struct hci_cb *cb) | |
1085 | { | |
1086 | BT_DBG("%p name %s", cb, cb->name); | |
1087 | ||
1088 | write_lock_bh(&hci_cb_list_lock); | |
1089 | list_del(&cb->list); | |
1090 | write_unlock_bh(&hci_cb_list_lock); | |
1091 | ||
1092 | return 0; | |
1093 | } | |
1094 | EXPORT_SYMBOL(hci_unregister_cb); | |
1095 | ||
1096 | static int hci_send_frame(struct sk_buff *skb) | |
1097 | { | |
1098 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1099 | ||
1100 | if (!hdev) { | |
1101 | kfree_skb(skb); | |
1102 | return -ENODEV; | |
1103 | } | |
1104 | ||
0d48d939 | 1105 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1106 | |
1107 | if (atomic_read(&hdev->promisc)) { | |
1108 | /* Time stamp */ | |
a61bbcf2 | 1109 | __net_timestamp(skb); |
1da177e4 LT |
1110 | |
1111 | hci_send_to_sock(hdev, skb); | |
1112 | } | |
1113 | ||
1114 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1115 | skb_orphan(skb); | |
1116 | ||
1117 | return hdev->send(skb); | |
1118 | } | |
1119 | ||
1120 | /* Send HCI command */ | |
a9de9248 | 1121 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1122 | { |
1123 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1124 | struct hci_command_hdr *hdr; | |
1125 | struct sk_buff *skb; | |
1126 | ||
a9de9248 | 1127 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1128 | |
1129 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1130 | if (!skb) { | |
ef222013 | 1131 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1132 | return -ENOMEM; |
1133 | } | |
1134 | ||
1135 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1136 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1137 | hdr->plen = plen; |
1138 | ||
1139 | if (plen) | |
1140 | memcpy(skb_put(skb, plen), param, plen); | |
1141 | ||
1142 | BT_DBG("skb len %d", skb->len); | |
1143 | ||
0d48d939 | 1144 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 LT |
1145 | skb->dev = (void *) hdev; |
1146 | skb_queue_tail(&hdev->cmd_q, skb); | |
1147 | hci_sched_cmd(hdev); | |
1148 | ||
1149 | return 0; | |
1150 | } | |
1da177e4 LT |
1151 | |
1152 | /* Get data from the previously sent command */ | |
a9de9248 | 1153 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1154 | { |
1155 | struct hci_command_hdr *hdr; | |
1156 | ||
1157 | if (!hdev->sent_cmd) | |
1158 | return NULL; | |
1159 | ||
1160 | hdr = (void *) hdev->sent_cmd->data; | |
1161 | ||
a9de9248 | 1162 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1163 | return NULL; |
1164 | ||
a9de9248 | 1165 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1166 | |
1167 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1168 | } | |
1169 | ||
1170 | /* Send ACL data */ | |
1171 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1172 | { | |
1173 | struct hci_acl_hdr *hdr; | |
1174 | int len = skb->len; | |
1175 | ||
badff6d0 ACM |
1176 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1177 | skb_reset_transport_header(skb); | |
9c70220b | 1178 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1179 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1180 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1181 | } |
1182 | ||
1183 | int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) | |
1184 | { | |
1185 | struct hci_dev *hdev = conn->hdev; | |
1186 | struct sk_buff *list; | |
1187 | ||
1188 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); | |
1189 | ||
1190 | skb->dev = (void *) hdev; | |
0d48d939 | 1191 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1192 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_START); |
1193 | ||
1194 | if (!(list = skb_shinfo(skb)->frag_list)) { | |
1195 | /* Non fragmented */ | |
1196 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1197 | ||
1198 | skb_queue_tail(&conn->data_q, skb); | |
1199 | } else { | |
1200 | /* Fragmented */ | |
1201 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1202 | ||
1203 | skb_shinfo(skb)->frag_list = NULL; | |
1204 | ||
1205 | /* Queue all fragments atomically */ | |
1206 | spin_lock_bh(&conn->data_q.lock); | |
1207 | ||
1208 | __skb_queue_tail(&conn->data_q, skb); | |
1209 | do { | |
1210 | skb = list; list = list->next; | |
8e87d142 | 1211 | |
1da177e4 | 1212 | skb->dev = (void *) hdev; |
0d48d939 | 1213 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1214 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT); |
1215 | ||
1216 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1217 | ||
1218 | __skb_queue_tail(&conn->data_q, skb); | |
1219 | } while (list); | |
1220 | ||
1221 | spin_unlock_bh(&conn->data_q.lock); | |
1222 | } | |
1223 | ||
1224 | hci_sched_tx(hdev); | |
1225 | return 0; | |
1226 | } | |
1227 | EXPORT_SYMBOL(hci_send_acl); | |
1228 | ||
1229 | /* Send SCO data */ | |
1230 | int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) | |
1231 | { | |
1232 | struct hci_dev *hdev = conn->hdev; | |
1233 | struct hci_sco_hdr hdr; | |
1234 | ||
1235 | BT_DBG("%s len %d", hdev->name, skb->len); | |
1236 | ||
1237 | if (skb->len > hdev->sco_mtu) { | |
1238 | kfree_skb(skb); | |
1239 | return -EINVAL; | |
1240 | } | |
1241 | ||
aca3192c | 1242 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
1243 | hdr.dlen = skb->len; |
1244 | ||
badff6d0 ACM |
1245 | skb_push(skb, HCI_SCO_HDR_SIZE); |
1246 | skb_reset_transport_header(skb); | |
9c70220b | 1247 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
1248 | |
1249 | skb->dev = (void *) hdev; | |
0d48d939 | 1250 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
1da177e4 LT |
1251 | skb_queue_tail(&conn->data_q, skb); |
1252 | hci_sched_tx(hdev); | |
1253 | return 0; | |
1254 | } | |
1255 | EXPORT_SYMBOL(hci_send_sco); | |
1256 | ||
1257 | /* ---- HCI TX task (outgoing data) ---- */ | |
1258 | ||
1259 | /* HCI Connection scheduler */ | |
1260 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
1261 | { | |
1262 | struct hci_conn_hash *h = &hdev->conn_hash; | |
5b7f9909 | 1263 | struct hci_conn *conn = NULL; |
1da177e4 LT |
1264 | int num = 0, min = ~0; |
1265 | struct list_head *p; | |
1266 | ||
8e87d142 | 1267 | /* We don't have to lock device here. Connections are always |
1da177e4 LT |
1268 | * added and removed with TX task disabled. */ |
1269 | list_for_each(p, &h->list) { | |
1270 | struct hci_conn *c; | |
1271 | c = list_entry(p, struct hci_conn, list); | |
1272 | ||
1273 | if (c->type != type || c->state != BT_CONNECTED | |
1274 | || skb_queue_empty(&c->data_q)) | |
1275 | continue; | |
1276 | num++; | |
1277 | ||
1278 | if (c->sent < min) { | |
1279 | min = c->sent; | |
1280 | conn = c; | |
1281 | } | |
1282 | } | |
1283 | ||
1284 | if (conn) { | |
1285 | int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt); | |
1286 | int q = cnt / num; | |
1287 | *quote = q ? q : 1; | |
1288 | } else | |
1289 | *quote = 0; | |
1290 | ||
1291 | BT_DBG("conn %p quote %d", conn, *quote); | |
1292 | return conn; | |
1293 | } | |
1294 | ||
1295 | static inline void hci_acl_tx_to(struct hci_dev *hdev) | |
1296 | { | |
1297 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1298 | struct list_head *p; | |
1299 | struct hci_conn *c; | |
1300 | ||
1301 | BT_ERR("%s ACL tx timeout", hdev->name); | |
1302 | ||
1303 | /* Kill stalled connections */ | |
1304 | list_for_each(p, &h->list) { | |
1305 | c = list_entry(p, struct hci_conn, list); | |
1306 | if (c->type == ACL_LINK && c->sent) { | |
1307 | BT_ERR("%s killing stalled ACL connection %s", | |
1308 | hdev->name, batostr(&c->dst)); | |
1309 | hci_acl_disconn(c, 0x13); | |
1310 | } | |
1311 | } | |
1312 | } | |
1313 | ||
1314 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
1315 | { | |
1316 | struct hci_conn *conn; | |
1317 | struct sk_buff *skb; | |
1318 | int quote; | |
1319 | ||
1320 | BT_DBG("%s", hdev->name); | |
1321 | ||
1322 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1323 | /* ACL tx timeout must be longer than maximum | |
1324 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 1325 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
1da177e4 LT |
1326 | hci_acl_tx_to(hdev); |
1327 | } | |
1328 | ||
1329 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { | |
1330 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1331 | BT_DBG("skb %p len %d", skb, skb->len); | |
04837f64 MH |
1332 | |
1333 | hci_conn_enter_active_mode(conn); | |
1334 | ||
1da177e4 LT |
1335 | hci_send_frame(skb); |
1336 | hdev->acl_last_tx = jiffies; | |
1337 | ||
1338 | hdev->acl_cnt--; | |
1339 | conn->sent++; | |
1340 | } | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | /* Schedule SCO */ | |
1345 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
1346 | { | |
1347 | struct hci_conn *conn; | |
1348 | struct sk_buff *skb; | |
1349 | int quote; | |
1350 | ||
1351 | BT_DBG("%s", hdev->name); | |
1352 | ||
1353 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { | |
1354 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1355 | BT_DBG("skb %p len %d", skb, skb->len); | |
1356 | hci_send_frame(skb); | |
1357 | ||
1358 | conn->sent++; | |
1359 | if (conn->sent == ~0) | |
1360 | conn->sent = 0; | |
1361 | } | |
1362 | } | |
1363 | } | |
1364 | ||
b6a0dc82 MH |
1365 | static inline void hci_sched_esco(struct hci_dev *hdev) |
1366 | { | |
1367 | struct hci_conn *conn; | |
1368 | struct sk_buff *skb; | |
1369 | int quote; | |
1370 | ||
1371 | BT_DBG("%s", hdev->name); | |
1372 | ||
1373 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { | |
1374 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1375 | BT_DBG("skb %p len %d", skb, skb->len); | |
1376 | hci_send_frame(skb); | |
1377 | ||
1378 | conn->sent++; | |
1379 | if (conn->sent == ~0) | |
1380 | conn->sent = 0; | |
1381 | } | |
1382 | } | |
1383 | } | |
1384 | ||
1da177e4 LT |
1385 | static void hci_tx_task(unsigned long arg) |
1386 | { | |
1387 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1388 | struct sk_buff *skb; | |
1389 | ||
1390 | read_lock(&hci_task_lock); | |
1391 | ||
1392 | BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt); | |
1393 | ||
1394 | /* Schedule queues and send stuff to HCI driver */ | |
1395 | ||
1396 | hci_sched_acl(hdev); | |
1397 | ||
1398 | hci_sched_sco(hdev); | |
1399 | ||
b6a0dc82 MH |
1400 | hci_sched_esco(hdev); |
1401 | ||
1da177e4 LT |
1402 | /* Send next queued raw (unknown type) packet */ |
1403 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
1404 | hci_send_frame(skb); | |
1405 | ||
1406 | read_unlock(&hci_task_lock); | |
1407 | } | |
1408 | ||
1409 | /* ----- HCI RX task (incoming data proccessing) ----- */ | |
1410 | ||
1411 | /* ACL data packet */ | |
1412 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1413 | { | |
1414 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
1415 | struct hci_conn *conn; | |
1416 | __u16 handle, flags; | |
1417 | ||
1418 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
1419 | ||
1420 | handle = __le16_to_cpu(hdr->handle); | |
1421 | flags = hci_flags(handle); | |
1422 | handle = hci_handle(handle); | |
1423 | ||
1424 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
1425 | ||
1426 | hdev->stat.acl_rx++; | |
1427 | ||
1428 | hci_dev_lock(hdev); | |
1429 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1430 | hci_dev_unlock(hdev); | |
8e87d142 | 1431 | |
1da177e4 LT |
1432 | if (conn) { |
1433 | register struct hci_proto *hp; | |
1434 | ||
04837f64 MH |
1435 | hci_conn_enter_active_mode(conn); |
1436 | ||
1da177e4 LT |
1437 | /* Send to upper protocol */ |
1438 | if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) { | |
1439 | hp->recv_acldata(conn, skb, flags); | |
1440 | return; | |
1441 | } | |
1442 | } else { | |
8e87d142 | 1443 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
1444 | hdev->name, handle); |
1445 | } | |
1446 | ||
1447 | kfree_skb(skb); | |
1448 | } | |
1449 | ||
1450 | /* SCO data packet */ | |
1451 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1452 | { | |
1453 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
1454 | struct hci_conn *conn; | |
1455 | __u16 handle; | |
1456 | ||
1457 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
1458 | ||
1459 | handle = __le16_to_cpu(hdr->handle); | |
1460 | ||
1461 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
1462 | ||
1463 | hdev->stat.sco_rx++; | |
1464 | ||
1465 | hci_dev_lock(hdev); | |
1466 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1467 | hci_dev_unlock(hdev); | |
1468 | ||
1469 | if (conn) { | |
1470 | register struct hci_proto *hp; | |
1471 | ||
1472 | /* Send to upper protocol */ | |
1473 | if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) { | |
1474 | hp->recv_scodata(conn, skb); | |
1475 | return; | |
1476 | } | |
1477 | } else { | |
8e87d142 | 1478 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
1479 | hdev->name, handle); |
1480 | } | |
1481 | ||
1482 | kfree_skb(skb); | |
1483 | } | |
1484 | ||
6516455d | 1485 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
1486 | { |
1487 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1488 | struct sk_buff *skb; | |
1489 | ||
1490 | BT_DBG("%s", hdev->name); | |
1491 | ||
1492 | read_lock(&hci_task_lock); | |
1493 | ||
1494 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
1495 | if (atomic_read(&hdev->promisc)) { | |
1496 | /* Send copy to the sockets */ | |
1497 | hci_send_to_sock(hdev, skb); | |
1498 | } | |
1499 | ||
1500 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
1501 | kfree_skb(skb); | |
1502 | continue; | |
1503 | } | |
1504 | ||
1505 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
1506 | /* Don't process data packets in this states. */ | |
0d48d939 | 1507 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1508 | case HCI_ACLDATA_PKT: |
1509 | case HCI_SCODATA_PKT: | |
1510 | kfree_skb(skb); | |
1511 | continue; | |
3ff50b79 | 1512 | } |
1da177e4 LT |
1513 | } |
1514 | ||
1515 | /* Process frame */ | |
0d48d939 | 1516 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1517 | case HCI_EVENT_PKT: |
1518 | hci_event_packet(hdev, skb); | |
1519 | break; | |
1520 | ||
1521 | case HCI_ACLDATA_PKT: | |
1522 | BT_DBG("%s ACL data packet", hdev->name); | |
1523 | hci_acldata_packet(hdev, skb); | |
1524 | break; | |
1525 | ||
1526 | case HCI_SCODATA_PKT: | |
1527 | BT_DBG("%s SCO data packet", hdev->name); | |
1528 | hci_scodata_packet(hdev, skb); | |
1529 | break; | |
1530 | ||
1531 | default: | |
1532 | kfree_skb(skb); | |
1533 | break; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | read_unlock(&hci_task_lock); | |
1538 | } | |
1539 | ||
1540 | static void hci_cmd_task(unsigned long arg) | |
1541 | { | |
1542 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1543 | struct sk_buff *skb; | |
1544 | ||
1545 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
1546 | ||
82453021 | 1547 | if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) { |
1da177e4 LT |
1548 | BT_ERR("%s command tx timeout", hdev->name); |
1549 | atomic_set(&hdev->cmd_cnt, 1); | |
1550 | } | |
1551 | ||
1552 | /* Send queued commands */ | |
1553 | if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) { | |
1554 | if (hdev->sent_cmd) | |
1555 | kfree_skb(hdev->sent_cmd); | |
1556 | ||
1557 | if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) { | |
1558 | atomic_dec(&hdev->cmd_cnt); | |
1559 | hci_send_frame(skb); | |
1560 | hdev->cmd_last_tx = jiffies; | |
1561 | } else { | |
1562 | skb_queue_head(&hdev->cmd_q, skb); | |
1563 | hci_sched_cmd(hdev); | |
1564 | } | |
1565 | } | |
1566 | } |