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Commit | Line | Data |
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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 | ||
7c6a329e MH |
167 | if (!test_bit(HCI_UP, &hdev->flags)) |
168 | return -ENETDOWN; | |
169 | ||
1da177e4 LT |
170 | /* Serialize all requests */ |
171 | hci_req_lock(hdev); | |
172 | ret = __hci_request(hdev, req, opt, timeout); | |
173 | hci_req_unlock(hdev); | |
174 | ||
175 | return ret; | |
176 | } | |
177 | ||
178 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) | |
179 | { | |
180 | BT_DBG("%s %ld", hdev->name, opt); | |
181 | ||
182 | /* Reset device */ | |
a9de9248 | 183 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
184 | } |
185 | ||
186 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) | |
187 | { | |
188 | struct sk_buff *skb; | |
1ebb9252 | 189 | __le16 param; |
89f2783d | 190 | __u8 flt_type; |
1da177e4 LT |
191 | |
192 | BT_DBG("%s %ld", hdev->name, opt); | |
193 | ||
194 | /* Driver initialization */ | |
195 | ||
196 | /* Special commands */ | |
197 | while ((skb = skb_dequeue(&hdev->driver_init))) { | |
0d48d939 | 198 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 LT |
199 | skb->dev = (void *) hdev; |
200 | skb_queue_tail(&hdev->cmd_q, skb); | |
201 | hci_sched_cmd(hdev); | |
202 | } | |
203 | skb_queue_purge(&hdev->driver_init); | |
204 | ||
205 | /* Mandatory initialization */ | |
206 | ||
207 | /* Reset */ | |
208 | if (test_bit(HCI_QUIRK_RESET_ON_INIT, &hdev->quirks)) | |
a9de9248 | 209 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
210 | |
211 | /* Read Local Supported Features */ | |
a9de9248 | 212 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
1da177e4 | 213 | |
1143e5a6 | 214 | /* Read Local Version */ |
a9de9248 | 215 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
1143e5a6 | 216 | |
1da177e4 | 217 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
a9de9248 | 218 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
1da177e4 LT |
219 | |
220 | #if 0 | |
221 | /* Host buffer size */ | |
222 | { | |
223 | struct hci_cp_host_buffer_size cp; | |
aca3192c | 224 | cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE); |
1da177e4 | 225 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
aca3192c YH |
226 | cp.acl_max_pkt = cpu_to_le16(0xffff); |
227 | cp.sco_max_pkt = cpu_to_le16(0xffff); | |
a9de9248 | 228 | hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
1da177e4 LT |
229 | } |
230 | #endif | |
231 | ||
232 | /* Read BD Address */ | |
a9de9248 MH |
233 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
234 | ||
235 | /* Read Class of Device */ | |
236 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); | |
237 | ||
238 | /* Read Local Name */ | |
239 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); | |
1da177e4 LT |
240 | |
241 | /* Read Voice Setting */ | |
a9de9248 | 242 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
1da177e4 LT |
243 | |
244 | /* Optional initialization */ | |
245 | ||
246 | /* Clear Event Filters */ | |
89f2783d | 247 | flt_type = HCI_FLT_CLEAR_ALL; |
a9de9248 | 248 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
1da177e4 LT |
249 | |
250 | /* Page timeout ~20 secs */ | |
aca3192c | 251 | param = cpu_to_le16(0x8000); |
a9de9248 | 252 | hci_send_cmd(hdev, HCI_OP_WRITE_PG_TIMEOUT, 2, ¶m); |
1da177e4 LT |
253 | |
254 | /* Connection accept timeout ~20 secs */ | |
aca3192c | 255 | param = cpu_to_le16(0x7d00); |
a9de9248 | 256 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
1da177e4 LT |
257 | } |
258 | ||
259 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) | |
260 | { | |
261 | __u8 scan = opt; | |
262 | ||
263 | BT_DBG("%s %x", hdev->name, scan); | |
264 | ||
265 | /* Inquiry and Page scans */ | |
a9de9248 | 266 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1da177e4 LT |
267 | } |
268 | ||
269 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
270 | { | |
271 | __u8 auth = opt; | |
272 | ||
273 | BT_DBG("%s %x", hdev->name, auth); | |
274 | ||
275 | /* Authentication */ | |
a9de9248 | 276 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
1da177e4 LT |
277 | } |
278 | ||
279 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
280 | { | |
281 | __u8 encrypt = opt; | |
282 | ||
283 | BT_DBG("%s %x", hdev->name, encrypt); | |
284 | ||
e4e8e37c | 285 | /* Encryption */ |
a9de9248 | 286 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
1da177e4 LT |
287 | } |
288 | ||
e4e8e37c MH |
289 | static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
290 | { | |
291 | __le16 policy = cpu_to_le16(opt); | |
292 | ||
293 | BT_DBG("%s %x", hdev->name, opt); | |
294 | ||
295 | /* Default link policy */ | |
296 | hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); | |
297 | } | |
298 | ||
8e87d142 | 299 | /* Get HCI device by index. |
1da177e4 LT |
300 | * Device is held on return. */ |
301 | struct hci_dev *hci_dev_get(int index) | |
302 | { | |
303 | struct hci_dev *hdev = NULL; | |
304 | struct list_head *p; | |
305 | ||
306 | BT_DBG("%d", index); | |
307 | ||
308 | if (index < 0) | |
309 | return NULL; | |
310 | ||
311 | read_lock(&hci_dev_list_lock); | |
312 | list_for_each(p, &hci_dev_list) { | |
313 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
314 | if (d->id == index) { | |
315 | hdev = hci_dev_hold(d); | |
316 | break; | |
317 | } | |
318 | } | |
319 | read_unlock(&hci_dev_list_lock); | |
320 | return hdev; | |
321 | } | |
1da177e4 LT |
322 | |
323 | /* ---- Inquiry support ---- */ | |
324 | static void inquiry_cache_flush(struct hci_dev *hdev) | |
325 | { | |
326 | struct inquiry_cache *cache = &hdev->inq_cache; | |
327 | struct inquiry_entry *next = cache->list, *e; | |
328 | ||
329 | BT_DBG("cache %p", cache); | |
330 | ||
331 | cache->list = NULL; | |
332 | while ((e = next)) { | |
333 | next = e->next; | |
334 | kfree(e); | |
335 | } | |
336 | } | |
337 | ||
338 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
339 | { | |
340 | struct inquiry_cache *cache = &hdev->inq_cache; | |
341 | struct inquiry_entry *e; | |
342 | ||
343 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
344 | ||
345 | for (e = cache->list; e; e = e->next) | |
346 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
347 | break; | |
348 | return e; | |
349 | } | |
350 | ||
351 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) | |
352 | { | |
353 | struct inquiry_cache *cache = &hdev->inq_cache; | |
354 | struct inquiry_entry *e; | |
355 | ||
356 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
357 | ||
358 | if (!(e = hci_inquiry_cache_lookup(hdev, &data->bdaddr))) { | |
359 | /* Entry not in the cache. Add new one. */ | |
25ea6db0 | 360 | if (!(e = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC))) |
1da177e4 | 361 | return; |
1da177e4 LT |
362 | e->next = cache->list; |
363 | cache->list = e; | |
364 | } | |
365 | ||
366 | memcpy(&e->data, data, sizeof(*data)); | |
367 | e->timestamp = jiffies; | |
368 | cache->timestamp = jiffies; | |
369 | } | |
370 | ||
371 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
372 | { | |
373 | struct inquiry_cache *cache = &hdev->inq_cache; | |
374 | struct inquiry_info *info = (struct inquiry_info *) buf; | |
375 | struct inquiry_entry *e; | |
376 | int copied = 0; | |
377 | ||
378 | for (e = cache->list; e && copied < num; e = e->next, copied++) { | |
379 | struct inquiry_data *data = &e->data; | |
380 | bacpy(&info->bdaddr, &data->bdaddr); | |
381 | info->pscan_rep_mode = data->pscan_rep_mode; | |
382 | info->pscan_period_mode = data->pscan_period_mode; | |
383 | info->pscan_mode = data->pscan_mode; | |
384 | memcpy(info->dev_class, data->dev_class, 3); | |
385 | info->clock_offset = data->clock_offset; | |
386 | info++; | |
387 | } | |
388 | ||
389 | BT_DBG("cache %p, copied %d", cache, copied); | |
390 | return copied; | |
391 | } | |
392 | ||
393 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
394 | { | |
395 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
396 | struct hci_cp_inquiry cp; | |
397 | ||
398 | BT_DBG("%s", hdev->name); | |
399 | ||
400 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
401 | return; | |
402 | ||
403 | /* Start Inquiry */ | |
404 | memcpy(&cp.lap, &ir->lap, 3); | |
405 | cp.length = ir->length; | |
406 | cp.num_rsp = ir->num_rsp; | |
a9de9248 | 407 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
1da177e4 LT |
408 | } |
409 | ||
410 | int hci_inquiry(void __user *arg) | |
411 | { | |
412 | __u8 __user *ptr = arg; | |
413 | struct hci_inquiry_req ir; | |
414 | struct hci_dev *hdev; | |
415 | int err = 0, do_inquiry = 0, max_rsp; | |
416 | long timeo; | |
417 | __u8 *buf; | |
418 | ||
419 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
420 | return -EFAULT; | |
421 | ||
422 | if (!(hdev = hci_dev_get(ir.dev_id))) | |
423 | return -ENODEV; | |
424 | ||
425 | hci_dev_lock_bh(hdev); | |
8e87d142 | 426 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
1da177e4 LT |
427 | inquiry_cache_empty(hdev) || |
428 | ir.flags & IREQ_CACHE_FLUSH) { | |
429 | inquiry_cache_flush(hdev); | |
430 | do_inquiry = 1; | |
431 | } | |
432 | hci_dev_unlock_bh(hdev); | |
433 | ||
04837f64 | 434 | timeo = ir.length * msecs_to_jiffies(2000); |
1da177e4 LT |
435 | if (do_inquiry && (err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo)) < 0) |
436 | goto done; | |
437 | ||
438 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
439 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
440 | ||
441 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
442 | * copy it to the user space. | |
443 | */ | |
444 | if (!(buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL))) { | |
445 | err = -ENOMEM; | |
446 | goto done; | |
447 | } | |
448 | ||
449 | hci_dev_lock_bh(hdev); | |
450 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); | |
451 | hci_dev_unlock_bh(hdev); | |
452 | ||
453 | BT_DBG("num_rsp %d", ir.num_rsp); | |
454 | ||
455 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
456 | ptr += sizeof(ir); | |
457 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
458 | ir.num_rsp)) | |
459 | err = -EFAULT; | |
8e87d142 | 460 | } else |
1da177e4 LT |
461 | err = -EFAULT; |
462 | ||
463 | kfree(buf); | |
464 | ||
465 | done: | |
466 | hci_dev_put(hdev); | |
467 | return err; | |
468 | } | |
469 | ||
470 | /* ---- HCI ioctl helpers ---- */ | |
471 | ||
472 | int hci_dev_open(__u16 dev) | |
473 | { | |
474 | struct hci_dev *hdev; | |
475 | int ret = 0; | |
476 | ||
477 | if (!(hdev = hci_dev_get(dev))) | |
478 | return -ENODEV; | |
479 | ||
480 | BT_DBG("%s %p", hdev->name, hdev); | |
481 | ||
482 | hci_req_lock(hdev); | |
483 | ||
484 | if (test_bit(HCI_UP, &hdev->flags)) { | |
485 | ret = -EALREADY; | |
486 | goto done; | |
487 | } | |
488 | ||
489 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
490 | set_bit(HCI_RAW, &hdev->flags); | |
491 | ||
492 | if (hdev->open(hdev)) { | |
493 | ret = -EIO; | |
494 | goto done; | |
495 | } | |
496 | ||
497 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
498 | atomic_set(&hdev->cmd_cnt, 1); | |
499 | set_bit(HCI_INIT, &hdev->flags); | |
500 | ||
501 | //__hci_request(hdev, hci_reset_req, 0, HZ); | |
04837f64 MH |
502 | ret = __hci_request(hdev, hci_init_req, 0, |
503 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
504 | |
505 | clear_bit(HCI_INIT, &hdev->flags); | |
506 | } | |
507 | ||
508 | if (!ret) { | |
509 | hci_dev_hold(hdev); | |
510 | set_bit(HCI_UP, &hdev->flags); | |
511 | hci_notify(hdev, HCI_DEV_UP); | |
8e87d142 | 512 | } else { |
1da177e4 LT |
513 | /* Init failed, cleanup */ |
514 | tasklet_kill(&hdev->rx_task); | |
515 | tasklet_kill(&hdev->tx_task); | |
516 | tasklet_kill(&hdev->cmd_task); | |
517 | ||
518 | skb_queue_purge(&hdev->cmd_q); | |
519 | skb_queue_purge(&hdev->rx_q); | |
520 | ||
521 | if (hdev->flush) | |
522 | hdev->flush(hdev); | |
523 | ||
524 | if (hdev->sent_cmd) { | |
525 | kfree_skb(hdev->sent_cmd); | |
526 | hdev->sent_cmd = NULL; | |
527 | } | |
528 | ||
529 | hdev->close(hdev); | |
530 | hdev->flags = 0; | |
531 | } | |
532 | ||
533 | done: | |
534 | hci_req_unlock(hdev); | |
535 | hci_dev_put(hdev); | |
536 | return ret; | |
537 | } | |
538 | ||
539 | static int hci_dev_do_close(struct hci_dev *hdev) | |
540 | { | |
541 | BT_DBG("%s %p", hdev->name, hdev); | |
542 | ||
543 | hci_req_cancel(hdev, ENODEV); | |
544 | hci_req_lock(hdev); | |
545 | ||
546 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
547 | hci_req_unlock(hdev); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | /* Kill RX and TX tasks */ | |
552 | tasklet_kill(&hdev->rx_task); | |
553 | tasklet_kill(&hdev->tx_task); | |
554 | ||
555 | hci_dev_lock_bh(hdev); | |
556 | inquiry_cache_flush(hdev); | |
557 | hci_conn_hash_flush(hdev); | |
558 | hci_dev_unlock_bh(hdev); | |
559 | ||
560 | hci_notify(hdev, HCI_DEV_DOWN); | |
561 | ||
562 | if (hdev->flush) | |
563 | hdev->flush(hdev); | |
564 | ||
565 | /* Reset device */ | |
566 | skb_queue_purge(&hdev->cmd_q); | |
567 | atomic_set(&hdev->cmd_cnt, 1); | |
568 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
569 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 MH |
570 | __hci_request(hdev, hci_reset_req, 0, |
571 | msecs_to_jiffies(250)); | |
1da177e4 LT |
572 | clear_bit(HCI_INIT, &hdev->flags); |
573 | } | |
574 | ||
575 | /* Kill cmd task */ | |
576 | tasklet_kill(&hdev->cmd_task); | |
577 | ||
578 | /* Drop queues */ | |
579 | skb_queue_purge(&hdev->rx_q); | |
580 | skb_queue_purge(&hdev->cmd_q); | |
581 | skb_queue_purge(&hdev->raw_q); | |
582 | ||
583 | /* Drop last sent command */ | |
584 | if (hdev->sent_cmd) { | |
585 | kfree_skb(hdev->sent_cmd); | |
586 | hdev->sent_cmd = NULL; | |
587 | } | |
588 | ||
589 | /* After this point our queues are empty | |
590 | * and no tasks are scheduled. */ | |
591 | hdev->close(hdev); | |
592 | ||
593 | /* Clear flags */ | |
594 | hdev->flags = 0; | |
595 | ||
596 | hci_req_unlock(hdev); | |
597 | ||
598 | hci_dev_put(hdev); | |
599 | return 0; | |
600 | } | |
601 | ||
602 | int hci_dev_close(__u16 dev) | |
603 | { | |
604 | struct hci_dev *hdev; | |
605 | int err; | |
606 | ||
607 | if (!(hdev = hci_dev_get(dev))) | |
608 | return -ENODEV; | |
609 | err = hci_dev_do_close(hdev); | |
610 | hci_dev_put(hdev); | |
611 | return err; | |
612 | } | |
613 | ||
614 | int hci_dev_reset(__u16 dev) | |
615 | { | |
616 | struct hci_dev *hdev; | |
617 | int ret = 0; | |
618 | ||
619 | if (!(hdev = hci_dev_get(dev))) | |
620 | return -ENODEV; | |
621 | ||
622 | hci_req_lock(hdev); | |
623 | tasklet_disable(&hdev->tx_task); | |
624 | ||
625 | if (!test_bit(HCI_UP, &hdev->flags)) | |
626 | goto done; | |
627 | ||
628 | /* Drop queues */ | |
629 | skb_queue_purge(&hdev->rx_q); | |
630 | skb_queue_purge(&hdev->cmd_q); | |
631 | ||
632 | hci_dev_lock_bh(hdev); | |
633 | inquiry_cache_flush(hdev); | |
634 | hci_conn_hash_flush(hdev); | |
635 | hci_dev_unlock_bh(hdev); | |
636 | ||
637 | if (hdev->flush) | |
638 | hdev->flush(hdev); | |
639 | ||
8e87d142 | 640 | atomic_set(&hdev->cmd_cnt, 1); |
1da177e4 LT |
641 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; |
642 | ||
643 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
644 | ret = __hci_request(hdev, hci_reset_req, 0, |
645 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
646 | |
647 | done: | |
648 | tasklet_enable(&hdev->tx_task); | |
649 | hci_req_unlock(hdev); | |
650 | hci_dev_put(hdev); | |
651 | return ret; | |
652 | } | |
653 | ||
654 | int hci_dev_reset_stat(__u16 dev) | |
655 | { | |
656 | struct hci_dev *hdev; | |
657 | int ret = 0; | |
658 | ||
659 | if (!(hdev = hci_dev_get(dev))) | |
660 | return -ENODEV; | |
661 | ||
662 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
663 | ||
664 | hci_dev_put(hdev); | |
665 | ||
666 | return ret; | |
667 | } | |
668 | ||
669 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
670 | { | |
671 | struct hci_dev *hdev; | |
672 | struct hci_dev_req dr; | |
673 | int err = 0; | |
674 | ||
675 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
676 | return -EFAULT; | |
677 | ||
678 | if (!(hdev = hci_dev_get(dr.dev_id))) | |
679 | return -ENODEV; | |
680 | ||
681 | switch (cmd) { | |
682 | case HCISETAUTH: | |
04837f64 MH |
683 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
684 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
685 | break; |
686 | ||
687 | case HCISETENCRYPT: | |
688 | if (!lmp_encrypt_capable(hdev)) { | |
689 | err = -EOPNOTSUPP; | |
690 | break; | |
691 | } | |
692 | ||
693 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
694 | /* Auth must be enabled first */ | |
04837f64 MH |
695 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
696 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
697 | if (err) |
698 | break; | |
699 | } | |
700 | ||
04837f64 MH |
701 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
702 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
703 | break; |
704 | ||
705 | case HCISETSCAN: | |
04837f64 MH |
706 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
707 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
708 | break; |
709 | ||
1da177e4 | 710 | case HCISETLINKPOL: |
e4e8e37c MH |
711 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
712 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
713 | break; |
714 | ||
715 | case HCISETLINKMODE: | |
e4e8e37c MH |
716 | hdev->link_mode = ((__u16) dr.dev_opt) & |
717 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
718 | break; | |
719 | ||
720 | case HCISETPTYPE: | |
721 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
722 | break; |
723 | ||
724 | case HCISETACLMTU: | |
e4e8e37c MH |
725 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
726 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
727 | break; |
728 | ||
729 | case HCISETSCOMTU: | |
e4e8e37c MH |
730 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
731 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
732 | break; |
733 | ||
734 | default: | |
735 | err = -EINVAL; | |
736 | break; | |
737 | } | |
e4e8e37c | 738 | |
1da177e4 LT |
739 | hci_dev_put(hdev); |
740 | return err; | |
741 | } | |
742 | ||
743 | int hci_get_dev_list(void __user *arg) | |
744 | { | |
745 | struct hci_dev_list_req *dl; | |
746 | struct hci_dev_req *dr; | |
747 | struct list_head *p; | |
748 | int n = 0, size, err; | |
749 | __u16 dev_num; | |
750 | ||
751 | if (get_user(dev_num, (__u16 __user *) arg)) | |
752 | return -EFAULT; | |
753 | ||
754 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
755 | return -EINVAL; | |
756 | ||
757 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
758 | ||
759 | if (!(dl = kmalloc(size, GFP_KERNEL))) | |
760 | return -ENOMEM; | |
761 | ||
762 | dr = dl->dev_req; | |
763 | ||
764 | read_lock_bh(&hci_dev_list_lock); | |
765 | list_for_each(p, &hci_dev_list) { | |
766 | struct hci_dev *hdev; | |
767 | hdev = list_entry(p, struct hci_dev, list); | |
768 | (dr + n)->dev_id = hdev->id; | |
769 | (dr + n)->dev_opt = hdev->flags; | |
770 | if (++n >= dev_num) | |
771 | break; | |
772 | } | |
773 | read_unlock_bh(&hci_dev_list_lock); | |
774 | ||
775 | dl->dev_num = n; | |
776 | size = sizeof(*dl) + n * sizeof(*dr); | |
777 | ||
778 | err = copy_to_user(arg, dl, size); | |
779 | kfree(dl); | |
780 | ||
781 | return err ? -EFAULT : 0; | |
782 | } | |
783 | ||
784 | int hci_get_dev_info(void __user *arg) | |
785 | { | |
786 | struct hci_dev *hdev; | |
787 | struct hci_dev_info di; | |
788 | int err = 0; | |
789 | ||
790 | if (copy_from_user(&di, arg, sizeof(di))) | |
791 | return -EFAULT; | |
792 | ||
793 | if (!(hdev = hci_dev_get(di.dev_id))) | |
794 | return -ENODEV; | |
795 | ||
796 | strcpy(di.name, hdev->name); | |
797 | di.bdaddr = hdev->bdaddr; | |
798 | di.type = hdev->type; | |
799 | di.flags = hdev->flags; | |
800 | di.pkt_type = hdev->pkt_type; | |
801 | di.acl_mtu = hdev->acl_mtu; | |
802 | di.acl_pkts = hdev->acl_pkts; | |
803 | di.sco_mtu = hdev->sco_mtu; | |
804 | di.sco_pkts = hdev->sco_pkts; | |
805 | di.link_policy = hdev->link_policy; | |
806 | di.link_mode = hdev->link_mode; | |
807 | ||
808 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
809 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
810 | ||
811 | if (copy_to_user(arg, &di, sizeof(di))) | |
812 | err = -EFAULT; | |
813 | ||
814 | hci_dev_put(hdev); | |
815 | ||
816 | return err; | |
817 | } | |
818 | ||
819 | /* ---- Interface to HCI drivers ---- */ | |
820 | ||
821 | /* Alloc HCI device */ | |
822 | struct hci_dev *hci_alloc_dev(void) | |
823 | { | |
824 | struct hci_dev *hdev; | |
825 | ||
25ea6db0 | 826 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
827 | if (!hdev) |
828 | return NULL; | |
829 | ||
1da177e4 LT |
830 | skb_queue_head_init(&hdev->driver_init); |
831 | ||
832 | return hdev; | |
833 | } | |
834 | EXPORT_SYMBOL(hci_alloc_dev); | |
835 | ||
836 | /* Free HCI device */ | |
837 | void hci_free_dev(struct hci_dev *hdev) | |
838 | { | |
839 | skb_queue_purge(&hdev->driver_init); | |
840 | ||
a91f2e39 MH |
841 | /* will free via device release */ |
842 | put_device(&hdev->dev); | |
1da177e4 LT |
843 | } |
844 | EXPORT_SYMBOL(hci_free_dev); | |
845 | ||
846 | /* Register HCI device */ | |
847 | int hci_register_dev(struct hci_dev *hdev) | |
848 | { | |
849 | struct list_head *head = &hci_dev_list, *p; | |
ef222013 | 850 | int i, id = 0; |
1da177e4 LT |
851 | |
852 | BT_DBG("%p name %s type %d owner %p", hdev, hdev->name, hdev->type, hdev->owner); | |
853 | ||
854 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
855 | return -EINVAL; | |
856 | ||
857 | write_lock_bh(&hci_dev_list_lock); | |
858 | ||
859 | /* Find first available device id */ | |
860 | list_for_each(p, &hci_dev_list) { | |
861 | if (list_entry(p, struct hci_dev, list)->id != id) | |
862 | break; | |
863 | head = p; id++; | |
864 | } | |
8e87d142 | 865 | |
1da177e4 LT |
866 | sprintf(hdev->name, "hci%d", id); |
867 | hdev->id = id; | |
868 | list_add(&hdev->list, head); | |
869 | ||
870 | atomic_set(&hdev->refcnt, 1); | |
871 | spin_lock_init(&hdev->lock); | |
872 | ||
873 | hdev->flags = 0; | |
874 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 875 | hdev->esco_type = (ESCO_HV1); |
1da177e4 LT |
876 | hdev->link_mode = (HCI_LM_ACCEPT); |
877 | ||
04837f64 MH |
878 | hdev->idle_timeout = 0; |
879 | hdev->sniff_max_interval = 800; | |
880 | hdev->sniff_min_interval = 80; | |
881 | ||
1da177e4 LT |
882 | tasklet_init(&hdev->cmd_task, hci_cmd_task,(unsigned long) hdev); |
883 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); | |
884 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
885 | ||
886 | skb_queue_head_init(&hdev->rx_q); | |
887 | skb_queue_head_init(&hdev->cmd_q); | |
888 | skb_queue_head_init(&hdev->raw_q); | |
889 | ||
ef222013 MH |
890 | for (i = 0; i < 3; i++) |
891 | hdev->reassembly[i] = NULL; | |
892 | ||
1da177e4 LT |
893 | init_waitqueue_head(&hdev->req_wait_q); |
894 | init_MUTEX(&hdev->req_lock); | |
895 | ||
896 | inquiry_cache_init(hdev); | |
897 | ||
898 | hci_conn_hash_init(hdev); | |
899 | ||
900 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
901 | ||
902 | atomic_set(&hdev->promisc, 0); | |
903 | ||
904 | write_unlock_bh(&hci_dev_list_lock); | |
905 | ||
906 | hci_register_sysfs(hdev); | |
907 | ||
908 | hci_notify(hdev, HCI_DEV_REG); | |
909 | ||
910 | return id; | |
911 | } | |
912 | EXPORT_SYMBOL(hci_register_dev); | |
913 | ||
914 | /* Unregister HCI device */ | |
915 | int hci_unregister_dev(struct hci_dev *hdev) | |
916 | { | |
ef222013 MH |
917 | int i; |
918 | ||
1da177e4 LT |
919 | BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); |
920 | ||
1da177e4 LT |
921 | write_lock_bh(&hci_dev_list_lock); |
922 | list_del(&hdev->list); | |
923 | write_unlock_bh(&hci_dev_list_lock); | |
924 | ||
925 | hci_dev_do_close(hdev); | |
926 | ||
ef222013 MH |
927 | for (i = 0; i < 3; i++) |
928 | kfree_skb(hdev->reassembly[i]); | |
929 | ||
1da177e4 LT |
930 | hci_notify(hdev, HCI_DEV_UNREG); |
931 | ||
147e2d59 DY |
932 | hci_unregister_sysfs(hdev); |
933 | ||
1da177e4 | 934 | __hci_dev_put(hdev); |
ef222013 | 935 | |
1da177e4 LT |
936 | return 0; |
937 | } | |
938 | EXPORT_SYMBOL(hci_unregister_dev); | |
939 | ||
940 | /* Suspend HCI device */ | |
941 | int hci_suspend_dev(struct hci_dev *hdev) | |
942 | { | |
943 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
944 | return 0; | |
945 | } | |
946 | EXPORT_SYMBOL(hci_suspend_dev); | |
947 | ||
948 | /* Resume HCI device */ | |
949 | int hci_resume_dev(struct hci_dev *hdev) | |
950 | { | |
951 | hci_notify(hdev, HCI_DEV_RESUME); | |
952 | return 0; | |
953 | } | |
954 | EXPORT_SYMBOL(hci_resume_dev); | |
955 | ||
ef222013 MH |
956 | /* Receive packet type fragment */ |
957 | #define __reassembly(hdev, type) ((hdev)->reassembly[(type) - 2]) | |
958 | ||
959 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) | |
960 | { | |
961 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) | |
962 | return -EILSEQ; | |
963 | ||
964 | while (count) { | |
965 | struct sk_buff *skb = __reassembly(hdev, type); | |
966 | struct { int expect; } *scb; | |
967 | int len = 0; | |
968 | ||
969 | if (!skb) { | |
970 | /* Start of the frame */ | |
971 | ||
972 | switch (type) { | |
973 | case HCI_EVENT_PKT: | |
974 | if (count >= HCI_EVENT_HDR_SIZE) { | |
975 | struct hci_event_hdr *h = data; | |
976 | len = HCI_EVENT_HDR_SIZE + h->plen; | |
977 | } else | |
978 | return -EILSEQ; | |
979 | break; | |
980 | ||
981 | case HCI_ACLDATA_PKT: | |
982 | if (count >= HCI_ACL_HDR_SIZE) { | |
983 | struct hci_acl_hdr *h = data; | |
984 | len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen); | |
985 | } else | |
986 | return -EILSEQ; | |
987 | break; | |
988 | ||
989 | case HCI_SCODATA_PKT: | |
990 | if (count >= HCI_SCO_HDR_SIZE) { | |
991 | struct hci_sco_hdr *h = data; | |
992 | len = HCI_SCO_HDR_SIZE + h->dlen; | |
993 | } else | |
994 | return -EILSEQ; | |
995 | break; | |
996 | } | |
997 | ||
998 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
999 | if (!skb) { | |
1000 | BT_ERR("%s no memory for packet", hdev->name); | |
1001 | return -ENOMEM; | |
1002 | } | |
1003 | ||
1004 | skb->dev = (void *) hdev; | |
1005 | bt_cb(skb)->pkt_type = type; | |
00ae02f3 | 1006 | |
ef222013 MH |
1007 | __reassembly(hdev, type) = skb; |
1008 | ||
1009 | scb = (void *) skb->cb; | |
1010 | scb->expect = len; | |
1011 | } else { | |
1012 | /* Continuation */ | |
1013 | ||
1014 | scb = (void *) skb->cb; | |
1015 | len = scb->expect; | |
1016 | } | |
1017 | ||
1018 | len = min(len, count); | |
1019 | ||
1020 | memcpy(skb_put(skb, len), data, len); | |
1021 | ||
1022 | scb->expect -= len; | |
1023 | ||
1024 | if (scb->expect == 0) { | |
1025 | /* Complete frame */ | |
1026 | ||
1027 | __reassembly(hdev, type) = NULL; | |
1028 | ||
1029 | bt_cb(skb)->pkt_type = type; | |
1030 | hci_recv_frame(skb); | |
1031 | } | |
1032 | ||
1033 | count -= len; data += len; | |
1034 | } | |
1035 | ||
1036 | return 0; | |
1037 | } | |
1038 | EXPORT_SYMBOL(hci_recv_fragment); | |
1039 | ||
1da177e4 LT |
1040 | /* ---- Interface to upper protocols ---- */ |
1041 | ||
1042 | /* Register/Unregister protocols. | |
1043 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1044 | int hci_register_proto(struct hci_proto *hp) | |
1045 | { | |
1046 | int err = 0; | |
1047 | ||
1048 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1049 | ||
1050 | if (hp->id >= HCI_MAX_PROTO) | |
1051 | return -EINVAL; | |
1052 | ||
1053 | write_lock_bh(&hci_task_lock); | |
1054 | ||
1055 | if (!hci_proto[hp->id]) | |
1056 | hci_proto[hp->id] = hp; | |
1057 | else | |
1058 | err = -EEXIST; | |
1059 | ||
1060 | write_unlock_bh(&hci_task_lock); | |
1061 | ||
1062 | return err; | |
1063 | } | |
1064 | EXPORT_SYMBOL(hci_register_proto); | |
1065 | ||
1066 | int hci_unregister_proto(struct hci_proto *hp) | |
1067 | { | |
1068 | int err = 0; | |
1069 | ||
1070 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1071 | ||
1072 | if (hp->id >= HCI_MAX_PROTO) | |
1073 | return -EINVAL; | |
1074 | ||
1075 | write_lock_bh(&hci_task_lock); | |
1076 | ||
1077 | if (hci_proto[hp->id]) | |
1078 | hci_proto[hp->id] = NULL; | |
1079 | else | |
1080 | err = -ENOENT; | |
1081 | ||
1082 | write_unlock_bh(&hci_task_lock); | |
1083 | ||
1084 | return err; | |
1085 | } | |
1086 | EXPORT_SYMBOL(hci_unregister_proto); | |
1087 | ||
1088 | int hci_register_cb(struct hci_cb *cb) | |
1089 | { | |
1090 | BT_DBG("%p name %s", cb, cb->name); | |
1091 | ||
1092 | write_lock_bh(&hci_cb_list_lock); | |
1093 | list_add(&cb->list, &hci_cb_list); | |
1094 | write_unlock_bh(&hci_cb_list_lock); | |
1095 | ||
1096 | return 0; | |
1097 | } | |
1098 | EXPORT_SYMBOL(hci_register_cb); | |
1099 | ||
1100 | int hci_unregister_cb(struct hci_cb *cb) | |
1101 | { | |
1102 | BT_DBG("%p name %s", cb, cb->name); | |
1103 | ||
1104 | write_lock_bh(&hci_cb_list_lock); | |
1105 | list_del(&cb->list); | |
1106 | write_unlock_bh(&hci_cb_list_lock); | |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | EXPORT_SYMBOL(hci_unregister_cb); | |
1111 | ||
1112 | static int hci_send_frame(struct sk_buff *skb) | |
1113 | { | |
1114 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1115 | ||
1116 | if (!hdev) { | |
1117 | kfree_skb(skb); | |
1118 | return -ENODEV; | |
1119 | } | |
1120 | ||
0d48d939 | 1121 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1122 | |
1123 | if (atomic_read(&hdev->promisc)) { | |
1124 | /* Time stamp */ | |
a61bbcf2 | 1125 | __net_timestamp(skb); |
1da177e4 LT |
1126 | |
1127 | hci_send_to_sock(hdev, skb); | |
1128 | } | |
1129 | ||
1130 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1131 | skb_orphan(skb); | |
1132 | ||
1133 | return hdev->send(skb); | |
1134 | } | |
1135 | ||
1136 | /* Send HCI command */ | |
a9de9248 | 1137 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1138 | { |
1139 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1140 | struct hci_command_hdr *hdr; | |
1141 | struct sk_buff *skb; | |
1142 | ||
a9de9248 | 1143 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1144 | |
1145 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1146 | if (!skb) { | |
ef222013 | 1147 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1148 | return -ENOMEM; |
1149 | } | |
1150 | ||
1151 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1152 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1153 | hdr->plen = plen; |
1154 | ||
1155 | if (plen) | |
1156 | memcpy(skb_put(skb, plen), param, plen); | |
1157 | ||
1158 | BT_DBG("skb len %d", skb->len); | |
1159 | ||
0d48d939 | 1160 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 LT |
1161 | skb->dev = (void *) hdev; |
1162 | skb_queue_tail(&hdev->cmd_q, skb); | |
1163 | hci_sched_cmd(hdev); | |
1164 | ||
1165 | return 0; | |
1166 | } | |
1da177e4 LT |
1167 | |
1168 | /* Get data from the previously sent command */ | |
a9de9248 | 1169 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1170 | { |
1171 | struct hci_command_hdr *hdr; | |
1172 | ||
1173 | if (!hdev->sent_cmd) | |
1174 | return NULL; | |
1175 | ||
1176 | hdr = (void *) hdev->sent_cmd->data; | |
1177 | ||
a9de9248 | 1178 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1179 | return NULL; |
1180 | ||
a9de9248 | 1181 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1182 | |
1183 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1184 | } | |
1185 | ||
1186 | /* Send ACL data */ | |
1187 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1188 | { | |
1189 | struct hci_acl_hdr *hdr; | |
1190 | int len = skb->len; | |
1191 | ||
badff6d0 ACM |
1192 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1193 | skb_reset_transport_header(skb); | |
9c70220b | 1194 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1195 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1196 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1197 | } |
1198 | ||
1199 | int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) | |
1200 | { | |
1201 | struct hci_dev *hdev = conn->hdev; | |
1202 | struct sk_buff *list; | |
1203 | ||
1204 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); | |
1205 | ||
1206 | skb->dev = (void *) hdev; | |
0d48d939 | 1207 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1208 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_START); |
1209 | ||
1210 | if (!(list = skb_shinfo(skb)->frag_list)) { | |
1211 | /* Non fragmented */ | |
1212 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1213 | ||
1214 | skb_queue_tail(&conn->data_q, skb); | |
1215 | } else { | |
1216 | /* Fragmented */ | |
1217 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1218 | ||
1219 | skb_shinfo(skb)->frag_list = NULL; | |
1220 | ||
1221 | /* Queue all fragments atomically */ | |
1222 | spin_lock_bh(&conn->data_q.lock); | |
1223 | ||
1224 | __skb_queue_tail(&conn->data_q, skb); | |
1225 | do { | |
1226 | skb = list; list = list->next; | |
8e87d142 | 1227 | |
1da177e4 | 1228 | skb->dev = (void *) hdev; |
0d48d939 | 1229 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1230 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT); |
1231 | ||
1232 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1233 | ||
1234 | __skb_queue_tail(&conn->data_q, skb); | |
1235 | } while (list); | |
1236 | ||
1237 | spin_unlock_bh(&conn->data_q.lock); | |
1238 | } | |
1239 | ||
1240 | hci_sched_tx(hdev); | |
1241 | return 0; | |
1242 | } | |
1243 | EXPORT_SYMBOL(hci_send_acl); | |
1244 | ||
1245 | /* Send SCO data */ | |
1246 | int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) | |
1247 | { | |
1248 | struct hci_dev *hdev = conn->hdev; | |
1249 | struct hci_sco_hdr hdr; | |
1250 | ||
1251 | BT_DBG("%s len %d", hdev->name, skb->len); | |
1252 | ||
1253 | if (skb->len > hdev->sco_mtu) { | |
1254 | kfree_skb(skb); | |
1255 | return -EINVAL; | |
1256 | } | |
1257 | ||
aca3192c | 1258 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
1259 | hdr.dlen = skb->len; |
1260 | ||
badff6d0 ACM |
1261 | skb_push(skb, HCI_SCO_HDR_SIZE); |
1262 | skb_reset_transport_header(skb); | |
9c70220b | 1263 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
1264 | |
1265 | skb->dev = (void *) hdev; | |
0d48d939 | 1266 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
1da177e4 LT |
1267 | skb_queue_tail(&conn->data_q, skb); |
1268 | hci_sched_tx(hdev); | |
1269 | return 0; | |
1270 | } | |
1271 | EXPORT_SYMBOL(hci_send_sco); | |
1272 | ||
1273 | /* ---- HCI TX task (outgoing data) ---- */ | |
1274 | ||
1275 | /* HCI Connection scheduler */ | |
1276 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
1277 | { | |
1278 | struct hci_conn_hash *h = &hdev->conn_hash; | |
5b7f9909 | 1279 | struct hci_conn *conn = NULL; |
1da177e4 LT |
1280 | int num = 0, min = ~0; |
1281 | struct list_head *p; | |
1282 | ||
8e87d142 | 1283 | /* We don't have to lock device here. Connections are always |
1da177e4 LT |
1284 | * added and removed with TX task disabled. */ |
1285 | list_for_each(p, &h->list) { | |
1286 | struct hci_conn *c; | |
1287 | c = list_entry(p, struct hci_conn, list); | |
1288 | ||
769be974 | 1289 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 1290 | continue; |
769be974 MH |
1291 | |
1292 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
1293 | continue; | |
1294 | ||
1da177e4 LT |
1295 | num++; |
1296 | ||
1297 | if (c->sent < min) { | |
1298 | min = c->sent; | |
1299 | conn = c; | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | if (conn) { | |
1304 | int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt); | |
1305 | int q = cnt / num; | |
1306 | *quote = q ? q : 1; | |
1307 | } else | |
1308 | *quote = 0; | |
1309 | ||
1310 | BT_DBG("conn %p quote %d", conn, *quote); | |
1311 | return conn; | |
1312 | } | |
1313 | ||
1314 | static inline void hci_acl_tx_to(struct hci_dev *hdev) | |
1315 | { | |
1316 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1317 | struct list_head *p; | |
1318 | struct hci_conn *c; | |
1319 | ||
1320 | BT_ERR("%s ACL tx timeout", hdev->name); | |
1321 | ||
1322 | /* Kill stalled connections */ | |
1323 | list_for_each(p, &h->list) { | |
1324 | c = list_entry(p, struct hci_conn, list); | |
1325 | if (c->type == ACL_LINK && c->sent) { | |
1326 | BT_ERR("%s killing stalled ACL connection %s", | |
1327 | hdev->name, batostr(&c->dst)); | |
1328 | hci_acl_disconn(c, 0x13); | |
1329 | } | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
1334 | { | |
1335 | struct hci_conn *conn; | |
1336 | struct sk_buff *skb; | |
1337 | int quote; | |
1338 | ||
1339 | BT_DBG("%s", hdev->name); | |
1340 | ||
1341 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1342 | /* ACL tx timeout must be longer than maximum | |
1343 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 1344 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
1da177e4 LT |
1345 | hci_acl_tx_to(hdev); |
1346 | } | |
1347 | ||
1348 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { | |
1349 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1350 | BT_DBG("skb %p len %d", skb, skb->len); | |
04837f64 MH |
1351 | |
1352 | hci_conn_enter_active_mode(conn); | |
1353 | ||
1da177e4 LT |
1354 | hci_send_frame(skb); |
1355 | hdev->acl_last_tx = jiffies; | |
1356 | ||
1357 | hdev->acl_cnt--; | |
1358 | conn->sent++; | |
1359 | } | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | /* Schedule SCO */ | |
1364 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
1365 | { | |
1366 | struct hci_conn *conn; | |
1367 | struct sk_buff *skb; | |
1368 | int quote; | |
1369 | ||
1370 | BT_DBG("%s", hdev->name); | |
1371 | ||
1372 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { | |
1373 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1374 | BT_DBG("skb %p len %d", skb, skb->len); | |
1375 | hci_send_frame(skb); | |
1376 | ||
1377 | conn->sent++; | |
1378 | if (conn->sent == ~0) | |
1379 | conn->sent = 0; | |
1380 | } | |
1381 | } | |
1382 | } | |
1383 | ||
b6a0dc82 MH |
1384 | static inline void hci_sched_esco(struct hci_dev *hdev) |
1385 | { | |
1386 | struct hci_conn *conn; | |
1387 | struct sk_buff *skb; | |
1388 | int quote; | |
1389 | ||
1390 | BT_DBG("%s", hdev->name); | |
1391 | ||
1392 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { | |
1393 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1394 | BT_DBG("skb %p len %d", skb, skb->len); | |
1395 | hci_send_frame(skb); | |
1396 | ||
1397 | conn->sent++; | |
1398 | if (conn->sent == ~0) | |
1399 | conn->sent = 0; | |
1400 | } | |
1401 | } | |
1402 | } | |
1403 | ||
1da177e4 LT |
1404 | static void hci_tx_task(unsigned long arg) |
1405 | { | |
1406 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1407 | struct sk_buff *skb; | |
1408 | ||
1409 | read_lock(&hci_task_lock); | |
1410 | ||
1411 | BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt); | |
1412 | ||
1413 | /* Schedule queues and send stuff to HCI driver */ | |
1414 | ||
1415 | hci_sched_acl(hdev); | |
1416 | ||
1417 | hci_sched_sco(hdev); | |
1418 | ||
b6a0dc82 MH |
1419 | hci_sched_esco(hdev); |
1420 | ||
1da177e4 LT |
1421 | /* Send next queued raw (unknown type) packet */ |
1422 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
1423 | hci_send_frame(skb); | |
1424 | ||
1425 | read_unlock(&hci_task_lock); | |
1426 | } | |
1427 | ||
1428 | /* ----- HCI RX task (incoming data proccessing) ----- */ | |
1429 | ||
1430 | /* ACL data packet */ | |
1431 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1432 | { | |
1433 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
1434 | struct hci_conn *conn; | |
1435 | __u16 handle, flags; | |
1436 | ||
1437 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
1438 | ||
1439 | handle = __le16_to_cpu(hdr->handle); | |
1440 | flags = hci_flags(handle); | |
1441 | handle = hci_handle(handle); | |
1442 | ||
1443 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
1444 | ||
1445 | hdev->stat.acl_rx++; | |
1446 | ||
1447 | hci_dev_lock(hdev); | |
1448 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1449 | hci_dev_unlock(hdev); | |
8e87d142 | 1450 | |
1da177e4 LT |
1451 | if (conn) { |
1452 | register struct hci_proto *hp; | |
1453 | ||
04837f64 MH |
1454 | hci_conn_enter_active_mode(conn); |
1455 | ||
1da177e4 LT |
1456 | /* Send to upper protocol */ |
1457 | if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) { | |
1458 | hp->recv_acldata(conn, skb, flags); | |
1459 | return; | |
1460 | } | |
1461 | } else { | |
8e87d142 | 1462 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
1463 | hdev->name, handle); |
1464 | } | |
1465 | ||
1466 | kfree_skb(skb); | |
1467 | } | |
1468 | ||
1469 | /* SCO data packet */ | |
1470 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1471 | { | |
1472 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
1473 | struct hci_conn *conn; | |
1474 | __u16 handle; | |
1475 | ||
1476 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
1477 | ||
1478 | handle = __le16_to_cpu(hdr->handle); | |
1479 | ||
1480 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
1481 | ||
1482 | hdev->stat.sco_rx++; | |
1483 | ||
1484 | hci_dev_lock(hdev); | |
1485 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1486 | hci_dev_unlock(hdev); | |
1487 | ||
1488 | if (conn) { | |
1489 | register struct hci_proto *hp; | |
1490 | ||
1491 | /* Send to upper protocol */ | |
1492 | if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) { | |
1493 | hp->recv_scodata(conn, skb); | |
1494 | return; | |
1495 | } | |
1496 | } else { | |
8e87d142 | 1497 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
1498 | hdev->name, handle); |
1499 | } | |
1500 | ||
1501 | kfree_skb(skb); | |
1502 | } | |
1503 | ||
6516455d | 1504 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
1505 | { |
1506 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1507 | struct sk_buff *skb; | |
1508 | ||
1509 | BT_DBG("%s", hdev->name); | |
1510 | ||
1511 | read_lock(&hci_task_lock); | |
1512 | ||
1513 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
1514 | if (atomic_read(&hdev->promisc)) { | |
1515 | /* Send copy to the sockets */ | |
1516 | hci_send_to_sock(hdev, skb); | |
1517 | } | |
1518 | ||
1519 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
1520 | kfree_skb(skb); | |
1521 | continue; | |
1522 | } | |
1523 | ||
1524 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
1525 | /* Don't process data packets in this states. */ | |
0d48d939 | 1526 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1527 | case HCI_ACLDATA_PKT: |
1528 | case HCI_SCODATA_PKT: | |
1529 | kfree_skb(skb); | |
1530 | continue; | |
3ff50b79 | 1531 | } |
1da177e4 LT |
1532 | } |
1533 | ||
1534 | /* Process frame */ | |
0d48d939 | 1535 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1536 | case HCI_EVENT_PKT: |
1537 | hci_event_packet(hdev, skb); | |
1538 | break; | |
1539 | ||
1540 | case HCI_ACLDATA_PKT: | |
1541 | BT_DBG("%s ACL data packet", hdev->name); | |
1542 | hci_acldata_packet(hdev, skb); | |
1543 | break; | |
1544 | ||
1545 | case HCI_SCODATA_PKT: | |
1546 | BT_DBG("%s SCO data packet", hdev->name); | |
1547 | hci_scodata_packet(hdev, skb); | |
1548 | break; | |
1549 | ||
1550 | default: | |
1551 | kfree_skb(skb); | |
1552 | break; | |
1553 | } | |
1554 | } | |
1555 | ||
1556 | read_unlock(&hci_task_lock); | |
1557 | } | |
1558 | ||
1559 | static void hci_cmd_task(unsigned long arg) | |
1560 | { | |
1561 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1562 | struct sk_buff *skb; | |
1563 | ||
1564 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
1565 | ||
82453021 | 1566 | if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) { |
1da177e4 LT |
1567 | BT_ERR("%s command tx timeout", hdev->name); |
1568 | atomic_set(&hdev->cmd_cnt, 1); | |
1569 | } | |
1570 | ||
1571 | /* Send queued commands */ | |
1572 | if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) { | |
1573 | if (hdev->sent_cmd) | |
1574 | kfree_skb(hdev->sent_cmd); | |
1575 | ||
1576 | if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) { | |
1577 | atomic_dec(&hdev->cmd_cnt); | |
1578 | hci_send_frame(skb); | |
1579 | hdev->cmd_last_tx = jiffies; | |
1580 | } else { | |
1581 | skb_queue_head(&hdev->cmd_q, skb); | |
1582 | hci_sched_cmd(hdev); | |
1583 | } | |
1584 | } | |
1585 | } |