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> | |
f48fd9c8 | 40 | #include <linux/workqueue.h> |
1da177e4 LT |
41 | #include <linux/interrupt.h> |
42 | #include <linux/notifier.h> | |
611b30f7 | 43 | #include <linux/rfkill.h> |
1da177e4 LT |
44 | #include <net/sock.h> |
45 | ||
46 | #include <asm/system.h> | |
70f23020 | 47 | #include <linux/uaccess.h> |
1da177e4 LT |
48 | #include <asm/unaligned.h> |
49 | ||
50 | #include <net/bluetooth/bluetooth.h> | |
51 | #include <net/bluetooth/hci_core.h> | |
52 | ||
1da177e4 LT |
53 | static void hci_cmd_task(unsigned long arg); |
54 | static void hci_rx_task(unsigned long arg); | |
55 | static void hci_tx_task(unsigned long arg); | |
56 | static void hci_notify(struct hci_dev *hdev, int event); | |
57 | ||
58 | static DEFINE_RWLOCK(hci_task_lock); | |
59 | ||
60 | /* HCI device list */ | |
61 | LIST_HEAD(hci_dev_list); | |
62 | DEFINE_RWLOCK(hci_dev_list_lock); | |
63 | ||
64 | /* HCI callback list */ | |
65 | LIST_HEAD(hci_cb_list); | |
66 | DEFINE_RWLOCK(hci_cb_list_lock); | |
67 | ||
68 | /* HCI protocols */ | |
69 | #define HCI_MAX_PROTO 2 | |
70 | struct hci_proto *hci_proto[HCI_MAX_PROTO]; | |
71 | ||
72 | /* HCI notifiers list */ | |
e041c683 | 73 | static ATOMIC_NOTIFIER_HEAD(hci_notifier); |
1da177e4 LT |
74 | |
75 | /* ---- HCI notifications ---- */ | |
76 | ||
77 | int hci_register_notifier(struct notifier_block *nb) | |
78 | { | |
e041c683 | 79 | return atomic_notifier_chain_register(&hci_notifier, nb); |
1da177e4 LT |
80 | } |
81 | ||
82 | int hci_unregister_notifier(struct notifier_block *nb) | |
83 | { | |
e041c683 | 84 | return atomic_notifier_chain_unregister(&hci_notifier, nb); |
1da177e4 LT |
85 | } |
86 | ||
6516455d | 87 | static void hci_notify(struct hci_dev *hdev, int event) |
1da177e4 | 88 | { |
e041c683 | 89 | atomic_notifier_call_chain(&hci_notifier, event, hdev); |
1da177e4 LT |
90 | } |
91 | ||
92 | /* ---- HCI requests ---- */ | |
93 | ||
23bb5763 | 94 | void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result) |
1da177e4 | 95 | { |
23bb5763 JH |
96 | BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result); |
97 | ||
98 | /* If the request has set req_last_cmd (typical for multi-HCI | |
99 | * command requests) check if the completed command matches | |
100 | * this, and if not just return. Single HCI command requests | |
101 | * typically leave req_last_cmd as 0 */ | |
102 | if (hdev->req_last_cmd && cmd != hdev->req_last_cmd) | |
103 | return; | |
1da177e4 LT |
104 | |
105 | if (hdev->req_status == HCI_REQ_PEND) { | |
106 | hdev->req_result = result; | |
107 | hdev->req_status = HCI_REQ_DONE; | |
108 | wake_up_interruptible(&hdev->req_wait_q); | |
109 | } | |
110 | } | |
111 | ||
112 | static void hci_req_cancel(struct hci_dev *hdev, int err) | |
113 | { | |
114 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
115 | ||
116 | if (hdev->req_status == HCI_REQ_PEND) { | |
117 | hdev->req_result = err; | |
118 | hdev->req_status = HCI_REQ_CANCELED; | |
119 | wake_up_interruptible(&hdev->req_wait_q); | |
120 | } | |
121 | } | |
122 | ||
123 | /* Execute request and wait for completion. */ | |
8e87d142 | 124 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
1da177e4 LT |
125 | unsigned long opt, __u32 timeout) |
126 | { | |
127 | DECLARE_WAITQUEUE(wait, current); | |
128 | int err = 0; | |
129 | ||
130 | BT_DBG("%s start", hdev->name); | |
131 | ||
132 | hdev->req_status = HCI_REQ_PEND; | |
133 | ||
134 | add_wait_queue(&hdev->req_wait_q, &wait); | |
135 | set_current_state(TASK_INTERRUPTIBLE); | |
136 | ||
137 | req(hdev, opt); | |
138 | schedule_timeout(timeout); | |
139 | ||
140 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
141 | ||
142 | if (signal_pending(current)) | |
143 | return -EINTR; | |
144 | ||
145 | switch (hdev->req_status) { | |
146 | case HCI_REQ_DONE: | |
147 | err = -bt_err(hdev->req_result); | |
148 | break; | |
149 | ||
150 | case HCI_REQ_CANCELED: | |
151 | err = -hdev->req_result; | |
152 | break; | |
153 | ||
154 | default: | |
155 | err = -ETIMEDOUT; | |
156 | break; | |
3ff50b79 | 157 | } |
1da177e4 | 158 | |
23bb5763 | 159 | hdev->req_last_cmd = hdev->req_status = hdev->req_result = 0; |
1da177e4 LT |
160 | |
161 | BT_DBG("%s end: err %d", hdev->name, err); | |
162 | ||
163 | return err; | |
164 | } | |
165 | ||
166 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), | |
167 | unsigned long opt, __u32 timeout) | |
168 | { | |
169 | int ret; | |
170 | ||
7c6a329e MH |
171 | if (!test_bit(HCI_UP, &hdev->flags)) |
172 | return -ENETDOWN; | |
173 | ||
1da177e4 LT |
174 | /* Serialize all requests */ |
175 | hci_req_lock(hdev); | |
176 | ret = __hci_request(hdev, req, opt, timeout); | |
177 | hci_req_unlock(hdev); | |
178 | ||
179 | return ret; | |
180 | } | |
181 | ||
182 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) | |
183 | { | |
184 | BT_DBG("%s %ld", hdev->name, opt); | |
185 | ||
186 | /* Reset device */ | |
a9de9248 | 187 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
188 | } |
189 | ||
190 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) | |
191 | { | |
192 | struct sk_buff *skb; | |
1ebb9252 | 193 | __le16 param; |
89f2783d | 194 | __u8 flt_type; |
1da177e4 LT |
195 | |
196 | BT_DBG("%s %ld", hdev->name, opt); | |
197 | ||
198 | /* Driver initialization */ | |
199 | ||
200 | /* Special commands */ | |
201 | while ((skb = skb_dequeue(&hdev->driver_init))) { | |
0d48d939 | 202 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 203 | skb->dev = (void *) hdev; |
c78ae283 | 204 | |
1da177e4 | 205 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 206 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
207 | } |
208 | skb_queue_purge(&hdev->driver_init); | |
209 | ||
210 | /* Mandatory initialization */ | |
211 | ||
212 | /* Reset */ | |
7a9d4020 | 213 | if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) |
a9de9248 | 214 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
215 | |
216 | /* Read Local Supported Features */ | |
a9de9248 | 217 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
1da177e4 | 218 | |
1143e5a6 | 219 | /* Read Local Version */ |
a9de9248 | 220 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
1143e5a6 | 221 | |
1da177e4 | 222 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
a9de9248 | 223 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
1da177e4 LT |
224 | |
225 | #if 0 | |
226 | /* Host buffer size */ | |
227 | { | |
228 | struct hci_cp_host_buffer_size cp; | |
aca3192c | 229 | cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE); |
1da177e4 | 230 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
aca3192c YH |
231 | cp.acl_max_pkt = cpu_to_le16(0xffff); |
232 | cp.sco_max_pkt = cpu_to_le16(0xffff); | |
a9de9248 | 233 | hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
1da177e4 LT |
234 | } |
235 | #endif | |
236 | ||
237 | /* Read BD Address */ | |
a9de9248 MH |
238 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
239 | ||
240 | /* Read Class of Device */ | |
241 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); | |
242 | ||
243 | /* Read Local Name */ | |
244 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); | |
1da177e4 LT |
245 | |
246 | /* Read Voice Setting */ | |
a9de9248 | 247 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
1da177e4 LT |
248 | |
249 | /* Optional initialization */ | |
250 | ||
251 | /* Clear Event Filters */ | |
89f2783d | 252 | flt_type = HCI_FLT_CLEAR_ALL; |
a9de9248 | 253 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
1da177e4 LT |
254 | |
255 | /* Page timeout ~20 secs */ | |
aca3192c | 256 | param = cpu_to_le16(0x8000); |
a9de9248 | 257 | hci_send_cmd(hdev, HCI_OP_WRITE_PG_TIMEOUT, 2, ¶m); |
1da177e4 LT |
258 | |
259 | /* Connection accept timeout ~20 secs */ | |
aca3192c | 260 | param = cpu_to_le16(0x7d00); |
a9de9248 | 261 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
23bb5763 JH |
262 | |
263 | hdev->req_last_cmd = HCI_OP_WRITE_CA_TIMEOUT; | |
1da177e4 LT |
264 | } |
265 | ||
266 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) | |
267 | { | |
268 | __u8 scan = opt; | |
269 | ||
270 | BT_DBG("%s %x", hdev->name, scan); | |
271 | ||
272 | /* Inquiry and Page scans */ | |
a9de9248 | 273 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1da177e4 LT |
274 | } |
275 | ||
276 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
277 | { | |
278 | __u8 auth = opt; | |
279 | ||
280 | BT_DBG("%s %x", hdev->name, auth); | |
281 | ||
282 | /* Authentication */ | |
a9de9248 | 283 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
1da177e4 LT |
284 | } |
285 | ||
286 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
287 | { | |
288 | __u8 encrypt = opt; | |
289 | ||
290 | BT_DBG("%s %x", hdev->name, encrypt); | |
291 | ||
e4e8e37c | 292 | /* Encryption */ |
a9de9248 | 293 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
1da177e4 LT |
294 | } |
295 | ||
e4e8e37c MH |
296 | static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
297 | { | |
298 | __le16 policy = cpu_to_le16(opt); | |
299 | ||
a418b893 | 300 | BT_DBG("%s %x", hdev->name, policy); |
e4e8e37c MH |
301 | |
302 | /* Default link policy */ | |
303 | hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); | |
304 | } | |
305 | ||
8e87d142 | 306 | /* Get HCI device by index. |
1da177e4 LT |
307 | * Device is held on return. */ |
308 | struct hci_dev *hci_dev_get(int index) | |
309 | { | |
310 | struct hci_dev *hdev = NULL; | |
311 | struct list_head *p; | |
312 | ||
313 | BT_DBG("%d", index); | |
314 | ||
315 | if (index < 0) | |
316 | return NULL; | |
317 | ||
318 | read_lock(&hci_dev_list_lock); | |
319 | list_for_each(p, &hci_dev_list) { | |
320 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
321 | if (d->id == index) { | |
322 | hdev = hci_dev_hold(d); | |
323 | break; | |
324 | } | |
325 | } | |
326 | read_unlock(&hci_dev_list_lock); | |
327 | return hdev; | |
328 | } | |
1da177e4 LT |
329 | |
330 | /* ---- Inquiry support ---- */ | |
331 | static void inquiry_cache_flush(struct hci_dev *hdev) | |
332 | { | |
333 | struct inquiry_cache *cache = &hdev->inq_cache; | |
334 | struct inquiry_entry *next = cache->list, *e; | |
335 | ||
336 | BT_DBG("cache %p", cache); | |
337 | ||
338 | cache->list = NULL; | |
339 | while ((e = next)) { | |
340 | next = e->next; | |
341 | kfree(e); | |
342 | } | |
343 | } | |
344 | ||
345 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
346 | { | |
347 | struct inquiry_cache *cache = &hdev->inq_cache; | |
348 | struct inquiry_entry *e; | |
349 | ||
350 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
351 | ||
352 | for (e = cache->list; e; e = e->next) | |
353 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
354 | break; | |
355 | return e; | |
356 | } | |
357 | ||
358 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) | |
359 | { | |
360 | struct inquiry_cache *cache = &hdev->inq_cache; | |
70f23020 | 361 | struct inquiry_entry *ie; |
1da177e4 LT |
362 | |
363 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
364 | ||
70f23020 AE |
365 | ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr); |
366 | if (!ie) { | |
1da177e4 | 367 | /* Entry not in the cache. Add new one. */ |
70f23020 AE |
368 | ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC); |
369 | if (!ie) | |
1da177e4 | 370 | return; |
70f23020 AE |
371 | |
372 | ie->next = cache->list; | |
373 | cache->list = ie; | |
1da177e4 LT |
374 | } |
375 | ||
70f23020 AE |
376 | memcpy(&ie->data, data, sizeof(*data)); |
377 | ie->timestamp = jiffies; | |
1da177e4 LT |
378 | cache->timestamp = jiffies; |
379 | } | |
380 | ||
381 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
382 | { | |
383 | struct inquiry_cache *cache = &hdev->inq_cache; | |
384 | struct inquiry_info *info = (struct inquiry_info *) buf; | |
385 | struct inquiry_entry *e; | |
386 | int copied = 0; | |
387 | ||
388 | for (e = cache->list; e && copied < num; e = e->next, copied++) { | |
389 | struct inquiry_data *data = &e->data; | |
390 | bacpy(&info->bdaddr, &data->bdaddr); | |
391 | info->pscan_rep_mode = data->pscan_rep_mode; | |
392 | info->pscan_period_mode = data->pscan_period_mode; | |
393 | info->pscan_mode = data->pscan_mode; | |
394 | memcpy(info->dev_class, data->dev_class, 3); | |
395 | info->clock_offset = data->clock_offset; | |
396 | info++; | |
397 | } | |
398 | ||
399 | BT_DBG("cache %p, copied %d", cache, copied); | |
400 | return copied; | |
401 | } | |
402 | ||
403 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
404 | { | |
405 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
406 | struct hci_cp_inquiry cp; | |
407 | ||
408 | BT_DBG("%s", hdev->name); | |
409 | ||
410 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
411 | return; | |
412 | ||
413 | /* Start Inquiry */ | |
414 | memcpy(&cp.lap, &ir->lap, 3); | |
415 | cp.length = ir->length; | |
416 | cp.num_rsp = ir->num_rsp; | |
a9de9248 | 417 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
1da177e4 LT |
418 | } |
419 | ||
420 | int hci_inquiry(void __user *arg) | |
421 | { | |
422 | __u8 __user *ptr = arg; | |
423 | struct hci_inquiry_req ir; | |
424 | struct hci_dev *hdev; | |
425 | int err = 0, do_inquiry = 0, max_rsp; | |
426 | long timeo; | |
427 | __u8 *buf; | |
428 | ||
429 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
430 | return -EFAULT; | |
431 | ||
432 | if (!(hdev = hci_dev_get(ir.dev_id))) | |
433 | return -ENODEV; | |
434 | ||
435 | hci_dev_lock_bh(hdev); | |
8e87d142 | 436 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
70f23020 AE |
437 | inquiry_cache_empty(hdev) || |
438 | ir.flags & IREQ_CACHE_FLUSH) { | |
1da177e4 LT |
439 | inquiry_cache_flush(hdev); |
440 | do_inquiry = 1; | |
441 | } | |
442 | hci_dev_unlock_bh(hdev); | |
443 | ||
04837f64 | 444 | timeo = ir.length * msecs_to_jiffies(2000); |
70f23020 AE |
445 | |
446 | if (do_inquiry) { | |
447 | err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo); | |
448 | if (err < 0) | |
449 | goto done; | |
450 | } | |
1da177e4 LT |
451 | |
452 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
453 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
454 | ||
455 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
456 | * copy it to the user space. | |
457 | */ | |
70f23020 AE |
458 | buf = kmalloc(sizeof(struct inquiry_info) *max_rsp, GFP_KERNEL); |
459 | if (!buf) { | |
1da177e4 LT |
460 | err = -ENOMEM; |
461 | goto done; | |
462 | } | |
463 | ||
464 | hci_dev_lock_bh(hdev); | |
465 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); | |
466 | hci_dev_unlock_bh(hdev); | |
467 | ||
468 | BT_DBG("num_rsp %d", ir.num_rsp); | |
469 | ||
470 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
471 | ptr += sizeof(ir); | |
472 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
473 | ir.num_rsp)) | |
474 | err = -EFAULT; | |
8e87d142 | 475 | } else |
1da177e4 LT |
476 | err = -EFAULT; |
477 | ||
478 | kfree(buf); | |
479 | ||
480 | done: | |
481 | hci_dev_put(hdev); | |
482 | return err; | |
483 | } | |
484 | ||
485 | /* ---- HCI ioctl helpers ---- */ | |
486 | ||
487 | int hci_dev_open(__u16 dev) | |
488 | { | |
489 | struct hci_dev *hdev; | |
490 | int ret = 0; | |
491 | ||
492 | if (!(hdev = hci_dev_get(dev))) | |
493 | return -ENODEV; | |
494 | ||
495 | BT_DBG("%s %p", hdev->name, hdev); | |
496 | ||
497 | hci_req_lock(hdev); | |
498 | ||
611b30f7 MH |
499 | if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) { |
500 | ret = -ERFKILL; | |
501 | goto done; | |
502 | } | |
503 | ||
1da177e4 LT |
504 | if (test_bit(HCI_UP, &hdev->flags)) { |
505 | ret = -EALREADY; | |
506 | goto done; | |
507 | } | |
508 | ||
509 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
510 | set_bit(HCI_RAW, &hdev->flags); | |
511 | ||
943da25d MH |
512 | /* Treat all non BR/EDR controllers as raw devices for now */ |
513 | if (hdev->dev_type != HCI_BREDR) | |
514 | set_bit(HCI_RAW, &hdev->flags); | |
515 | ||
1da177e4 LT |
516 | if (hdev->open(hdev)) { |
517 | ret = -EIO; | |
518 | goto done; | |
519 | } | |
520 | ||
521 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
522 | atomic_set(&hdev->cmd_cnt, 1); | |
523 | set_bit(HCI_INIT, &hdev->flags); | |
524 | ||
525 | //__hci_request(hdev, hci_reset_req, 0, HZ); | |
04837f64 MH |
526 | ret = __hci_request(hdev, hci_init_req, 0, |
527 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
528 | |
529 | clear_bit(HCI_INIT, &hdev->flags); | |
530 | } | |
531 | ||
532 | if (!ret) { | |
533 | hci_dev_hold(hdev); | |
534 | set_bit(HCI_UP, &hdev->flags); | |
535 | hci_notify(hdev, HCI_DEV_UP); | |
8e87d142 | 536 | } else { |
1da177e4 LT |
537 | /* Init failed, cleanup */ |
538 | tasklet_kill(&hdev->rx_task); | |
539 | tasklet_kill(&hdev->tx_task); | |
540 | tasklet_kill(&hdev->cmd_task); | |
541 | ||
542 | skb_queue_purge(&hdev->cmd_q); | |
543 | skb_queue_purge(&hdev->rx_q); | |
544 | ||
545 | if (hdev->flush) | |
546 | hdev->flush(hdev); | |
547 | ||
548 | if (hdev->sent_cmd) { | |
549 | kfree_skb(hdev->sent_cmd); | |
550 | hdev->sent_cmd = NULL; | |
551 | } | |
552 | ||
553 | hdev->close(hdev); | |
554 | hdev->flags = 0; | |
555 | } | |
556 | ||
557 | done: | |
558 | hci_req_unlock(hdev); | |
559 | hci_dev_put(hdev); | |
560 | return ret; | |
561 | } | |
562 | ||
563 | static int hci_dev_do_close(struct hci_dev *hdev) | |
564 | { | |
565 | BT_DBG("%s %p", hdev->name, hdev); | |
566 | ||
567 | hci_req_cancel(hdev, ENODEV); | |
568 | hci_req_lock(hdev); | |
569 | ||
570 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
571 | hci_req_unlock(hdev); | |
572 | return 0; | |
573 | } | |
574 | ||
575 | /* Kill RX and TX tasks */ | |
576 | tasklet_kill(&hdev->rx_task); | |
577 | tasklet_kill(&hdev->tx_task); | |
578 | ||
579 | hci_dev_lock_bh(hdev); | |
580 | inquiry_cache_flush(hdev); | |
581 | hci_conn_hash_flush(hdev); | |
582 | hci_dev_unlock_bh(hdev); | |
583 | ||
584 | hci_notify(hdev, HCI_DEV_DOWN); | |
585 | ||
586 | if (hdev->flush) | |
587 | hdev->flush(hdev); | |
588 | ||
589 | /* Reset device */ | |
590 | skb_queue_purge(&hdev->cmd_q); | |
591 | atomic_set(&hdev->cmd_cnt, 1); | |
592 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
593 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 MH |
594 | __hci_request(hdev, hci_reset_req, 0, |
595 | msecs_to_jiffies(250)); | |
1da177e4 LT |
596 | clear_bit(HCI_INIT, &hdev->flags); |
597 | } | |
598 | ||
599 | /* Kill cmd task */ | |
600 | tasklet_kill(&hdev->cmd_task); | |
601 | ||
602 | /* Drop queues */ | |
603 | skb_queue_purge(&hdev->rx_q); | |
604 | skb_queue_purge(&hdev->cmd_q); | |
605 | skb_queue_purge(&hdev->raw_q); | |
606 | ||
607 | /* Drop last sent command */ | |
608 | if (hdev->sent_cmd) { | |
609 | kfree_skb(hdev->sent_cmd); | |
610 | hdev->sent_cmd = NULL; | |
611 | } | |
612 | ||
613 | /* After this point our queues are empty | |
614 | * and no tasks are scheduled. */ | |
615 | hdev->close(hdev); | |
616 | ||
617 | /* Clear flags */ | |
618 | hdev->flags = 0; | |
619 | ||
620 | hci_req_unlock(hdev); | |
621 | ||
622 | hci_dev_put(hdev); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | int hci_dev_close(__u16 dev) | |
627 | { | |
628 | struct hci_dev *hdev; | |
629 | int err; | |
630 | ||
70f23020 AE |
631 | hdev = hci_dev_get(dev); |
632 | if (!hdev) | |
1da177e4 LT |
633 | return -ENODEV; |
634 | err = hci_dev_do_close(hdev); | |
635 | hci_dev_put(hdev); | |
636 | return err; | |
637 | } | |
638 | ||
639 | int hci_dev_reset(__u16 dev) | |
640 | { | |
641 | struct hci_dev *hdev; | |
642 | int ret = 0; | |
643 | ||
70f23020 AE |
644 | hdev = hci_dev_get(dev); |
645 | if (!hdev) | |
1da177e4 LT |
646 | return -ENODEV; |
647 | ||
648 | hci_req_lock(hdev); | |
649 | tasklet_disable(&hdev->tx_task); | |
650 | ||
651 | if (!test_bit(HCI_UP, &hdev->flags)) | |
652 | goto done; | |
653 | ||
654 | /* Drop queues */ | |
655 | skb_queue_purge(&hdev->rx_q); | |
656 | skb_queue_purge(&hdev->cmd_q); | |
657 | ||
658 | hci_dev_lock_bh(hdev); | |
659 | inquiry_cache_flush(hdev); | |
660 | hci_conn_hash_flush(hdev); | |
661 | hci_dev_unlock_bh(hdev); | |
662 | ||
663 | if (hdev->flush) | |
664 | hdev->flush(hdev); | |
665 | ||
8e87d142 | 666 | atomic_set(&hdev->cmd_cnt, 1); |
1da177e4 LT |
667 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; |
668 | ||
669 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
670 | ret = __hci_request(hdev, hci_reset_req, 0, |
671 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
672 | |
673 | done: | |
674 | tasklet_enable(&hdev->tx_task); | |
675 | hci_req_unlock(hdev); | |
676 | hci_dev_put(hdev); | |
677 | return ret; | |
678 | } | |
679 | ||
680 | int hci_dev_reset_stat(__u16 dev) | |
681 | { | |
682 | struct hci_dev *hdev; | |
683 | int ret = 0; | |
684 | ||
70f23020 AE |
685 | hdev = hci_dev_get(dev); |
686 | if (!hdev) | |
1da177e4 LT |
687 | return -ENODEV; |
688 | ||
689 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
690 | ||
691 | hci_dev_put(hdev); | |
692 | ||
693 | return ret; | |
694 | } | |
695 | ||
696 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
697 | { | |
698 | struct hci_dev *hdev; | |
699 | struct hci_dev_req dr; | |
700 | int err = 0; | |
701 | ||
702 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
703 | return -EFAULT; | |
704 | ||
70f23020 AE |
705 | hdev = hci_dev_get(dr.dev_id); |
706 | if (!hdev) | |
1da177e4 LT |
707 | return -ENODEV; |
708 | ||
709 | switch (cmd) { | |
710 | case HCISETAUTH: | |
04837f64 MH |
711 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
712 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
713 | break; |
714 | ||
715 | case HCISETENCRYPT: | |
716 | if (!lmp_encrypt_capable(hdev)) { | |
717 | err = -EOPNOTSUPP; | |
718 | break; | |
719 | } | |
720 | ||
721 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
722 | /* Auth must be enabled first */ | |
04837f64 MH |
723 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
724 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
725 | if (err) |
726 | break; | |
727 | } | |
728 | ||
04837f64 MH |
729 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
730 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
731 | break; |
732 | ||
733 | case HCISETSCAN: | |
04837f64 MH |
734 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
735 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
736 | break; |
737 | ||
1da177e4 | 738 | case HCISETLINKPOL: |
e4e8e37c MH |
739 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
740 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
741 | break; |
742 | ||
743 | case HCISETLINKMODE: | |
e4e8e37c MH |
744 | hdev->link_mode = ((__u16) dr.dev_opt) & |
745 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
746 | break; | |
747 | ||
748 | case HCISETPTYPE: | |
749 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
750 | break; |
751 | ||
752 | case HCISETACLMTU: | |
e4e8e37c MH |
753 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
754 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
755 | break; |
756 | ||
757 | case HCISETSCOMTU: | |
e4e8e37c MH |
758 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
759 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
760 | break; |
761 | ||
762 | default: | |
763 | err = -EINVAL; | |
764 | break; | |
765 | } | |
e4e8e37c | 766 | |
1da177e4 LT |
767 | hci_dev_put(hdev); |
768 | return err; | |
769 | } | |
770 | ||
771 | int hci_get_dev_list(void __user *arg) | |
772 | { | |
773 | struct hci_dev_list_req *dl; | |
774 | struct hci_dev_req *dr; | |
775 | struct list_head *p; | |
776 | int n = 0, size, err; | |
777 | __u16 dev_num; | |
778 | ||
779 | if (get_user(dev_num, (__u16 __user *) arg)) | |
780 | return -EFAULT; | |
781 | ||
782 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
783 | return -EINVAL; | |
784 | ||
785 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
786 | ||
70f23020 AE |
787 | dl = kzalloc(size, GFP_KERNEL); |
788 | if (!dl) | |
1da177e4 LT |
789 | return -ENOMEM; |
790 | ||
791 | dr = dl->dev_req; | |
792 | ||
793 | read_lock_bh(&hci_dev_list_lock); | |
794 | list_for_each(p, &hci_dev_list) { | |
795 | struct hci_dev *hdev; | |
796 | hdev = list_entry(p, struct hci_dev, list); | |
797 | (dr + n)->dev_id = hdev->id; | |
798 | (dr + n)->dev_opt = hdev->flags; | |
799 | if (++n >= dev_num) | |
800 | break; | |
801 | } | |
802 | read_unlock_bh(&hci_dev_list_lock); | |
803 | ||
804 | dl->dev_num = n; | |
805 | size = sizeof(*dl) + n * sizeof(*dr); | |
806 | ||
807 | err = copy_to_user(arg, dl, size); | |
808 | kfree(dl); | |
809 | ||
810 | return err ? -EFAULT : 0; | |
811 | } | |
812 | ||
813 | int hci_get_dev_info(void __user *arg) | |
814 | { | |
815 | struct hci_dev *hdev; | |
816 | struct hci_dev_info di; | |
817 | int err = 0; | |
818 | ||
819 | if (copy_from_user(&di, arg, sizeof(di))) | |
820 | return -EFAULT; | |
821 | ||
70f23020 AE |
822 | hdev = hci_dev_get(di.dev_id); |
823 | if (!hdev) | |
1da177e4 LT |
824 | return -ENODEV; |
825 | ||
826 | strcpy(di.name, hdev->name); | |
827 | di.bdaddr = hdev->bdaddr; | |
943da25d | 828 | di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4); |
1da177e4 LT |
829 | di.flags = hdev->flags; |
830 | di.pkt_type = hdev->pkt_type; | |
831 | di.acl_mtu = hdev->acl_mtu; | |
832 | di.acl_pkts = hdev->acl_pkts; | |
833 | di.sco_mtu = hdev->sco_mtu; | |
834 | di.sco_pkts = hdev->sco_pkts; | |
835 | di.link_policy = hdev->link_policy; | |
836 | di.link_mode = hdev->link_mode; | |
837 | ||
838 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
839 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
840 | ||
841 | if (copy_to_user(arg, &di, sizeof(di))) | |
842 | err = -EFAULT; | |
843 | ||
844 | hci_dev_put(hdev); | |
845 | ||
846 | return err; | |
847 | } | |
848 | ||
849 | /* ---- Interface to HCI drivers ---- */ | |
850 | ||
611b30f7 MH |
851 | static int hci_rfkill_set_block(void *data, bool blocked) |
852 | { | |
853 | struct hci_dev *hdev = data; | |
854 | ||
855 | BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); | |
856 | ||
857 | if (!blocked) | |
858 | return 0; | |
859 | ||
860 | hci_dev_do_close(hdev); | |
861 | ||
862 | return 0; | |
863 | } | |
864 | ||
865 | static const struct rfkill_ops hci_rfkill_ops = { | |
866 | .set_block = hci_rfkill_set_block, | |
867 | }; | |
868 | ||
1da177e4 LT |
869 | /* Alloc HCI device */ |
870 | struct hci_dev *hci_alloc_dev(void) | |
871 | { | |
872 | struct hci_dev *hdev; | |
873 | ||
25ea6db0 | 874 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
875 | if (!hdev) |
876 | return NULL; | |
877 | ||
1da177e4 LT |
878 | skb_queue_head_init(&hdev->driver_init); |
879 | ||
880 | return hdev; | |
881 | } | |
882 | EXPORT_SYMBOL(hci_alloc_dev); | |
883 | ||
884 | /* Free HCI device */ | |
885 | void hci_free_dev(struct hci_dev *hdev) | |
886 | { | |
887 | skb_queue_purge(&hdev->driver_init); | |
888 | ||
a91f2e39 MH |
889 | /* will free via device release */ |
890 | put_device(&hdev->dev); | |
1da177e4 LT |
891 | } |
892 | EXPORT_SYMBOL(hci_free_dev); | |
893 | ||
894 | /* Register HCI device */ | |
895 | int hci_register_dev(struct hci_dev *hdev) | |
896 | { | |
897 | struct list_head *head = &hci_dev_list, *p; | |
ef222013 | 898 | int i, id = 0; |
1da177e4 | 899 | |
c13854ce MH |
900 | BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name, |
901 | hdev->bus, hdev->owner); | |
1da177e4 LT |
902 | |
903 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
904 | return -EINVAL; | |
905 | ||
906 | write_lock_bh(&hci_dev_list_lock); | |
907 | ||
908 | /* Find first available device id */ | |
909 | list_for_each(p, &hci_dev_list) { | |
910 | if (list_entry(p, struct hci_dev, list)->id != id) | |
911 | break; | |
912 | head = p; id++; | |
913 | } | |
8e87d142 | 914 | |
1da177e4 LT |
915 | sprintf(hdev->name, "hci%d", id); |
916 | hdev->id = id; | |
917 | list_add(&hdev->list, head); | |
918 | ||
919 | atomic_set(&hdev->refcnt, 1); | |
920 | spin_lock_init(&hdev->lock); | |
921 | ||
922 | hdev->flags = 0; | |
923 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 924 | hdev->esco_type = (ESCO_HV1); |
1da177e4 LT |
925 | hdev->link_mode = (HCI_LM_ACCEPT); |
926 | ||
04837f64 MH |
927 | hdev->idle_timeout = 0; |
928 | hdev->sniff_max_interval = 800; | |
929 | hdev->sniff_min_interval = 80; | |
930 | ||
70f23020 | 931 | tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev); |
1da177e4 LT |
932 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); |
933 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
934 | ||
935 | skb_queue_head_init(&hdev->rx_q); | |
936 | skb_queue_head_init(&hdev->cmd_q); | |
937 | skb_queue_head_init(&hdev->raw_q); | |
938 | ||
cd4c5391 | 939 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
940 | hdev->reassembly[i] = NULL; |
941 | ||
1da177e4 | 942 | init_waitqueue_head(&hdev->req_wait_q); |
a6a67efd | 943 | mutex_init(&hdev->req_lock); |
1da177e4 LT |
944 | |
945 | inquiry_cache_init(hdev); | |
946 | ||
947 | hci_conn_hash_init(hdev); | |
948 | ||
ea4bd8ba | 949 | INIT_LIST_HEAD(&hdev->blacklist); |
f0358568 | 950 | |
1da177e4 LT |
951 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
952 | ||
953 | atomic_set(&hdev->promisc, 0); | |
954 | ||
955 | write_unlock_bh(&hci_dev_list_lock); | |
956 | ||
f48fd9c8 MH |
957 | hdev->workqueue = create_singlethread_workqueue(hdev->name); |
958 | if (!hdev->workqueue) | |
959 | goto nomem; | |
960 | ||
1da177e4 LT |
961 | hci_register_sysfs(hdev); |
962 | ||
611b30f7 MH |
963 | hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
964 | RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev); | |
965 | if (hdev->rfkill) { | |
966 | if (rfkill_register(hdev->rfkill) < 0) { | |
967 | rfkill_destroy(hdev->rfkill); | |
968 | hdev->rfkill = NULL; | |
969 | } | |
970 | } | |
971 | ||
c71e97bf | 972 | mgmt_index_added(hdev->id); |
1da177e4 LT |
973 | hci_notify(hdev, HCI_DEV_REG); |
974 | ||
975 | return id; | |
f48fd9c8 MH |
976 | |
977 | nomem: | |
978 | write_lock_bh(&hci_dev_list_lock); | |
979 | list_del(&hdev->list); | |
980 | write_unlock_bh(&hci_dev_list_lock); | |
981 | ||
982 | return -ENOMEM; | |
1da177e4 LT |
983 | } |
984 | EXPORT_SYMBOL(hci_register_dev); | |
985 | ||
986 | /* Unregister HCI device */ | |
987 | int hci_unregister_dev(struct hci_dev *hdev) | |
988 | { | |
ef222013 MH |
989 | int i; |
990 | ||
c13854ce | 991 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
1da177e4 | 992 | |
1da177e4 LT |
993 | write_lock_bh(&hci_dev_list_lock); |
994 | list_del(&hdev->list); | |
995 | write_unlock_bh(&hci_dev_list_lock); | |
996 | ||
997 | hci_dev_do_close(hdev); | |
998 | ||
cd4c5391 | 999 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1000 | kfree_skb(hdev->reassembly[i]); |
1001 | ||
c71e97bf | 1002 | mgmt_index_removed(hdev->id); |
1da177e4 LT |
1003 | hci_notify(hdev, HCI_DEV_UNREG); |
1004 | ||
611b30f7 MH |
1005 | if (hdev->rfkill) { |
1006 | rfkill_unregister(hdev->rfkill); | |
1007 | rfkill_destroy(hdev->rfkill); | |
1008 | } | |
1009 | ||
147e2d59 DY |
1010 | hci_unregister_sysfs(hdev); |
1011 | ||
f48fd9c8 MH |
1012 | destroy_workqueue(hdev->workqueue); |
1013 | ||
1da177e4 | 1014 | __hci_dev_put(hdev); |
ef222013 | 1015 | |
1da177e4 LT |
1016 | return 0; |
1017 | } | |
1018 | EXPORT_SYMBOL(hci_unregister_dev); | |
1019 | ||
1020 | /* Suspend HCI device */ | |
1021 | int hci_suspend_dev(struct hci_dev *hdev) | |
1022 | { | |
1023 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
1024 | return 0; | |
1025 | } | |
1026 | EXPORT_SYMBOL(hci_suspend_dev); | |
1027 | ||
1028 | /* Resume HCI device */ | |
1029 | int hci_resume_dev(struct hci_dev *hdev) | |
1030 | { | |
1031 | hci_notify(hdev, HCI_DEV_RESUME); | |
1032 | return 0; | |
1033 | } | |
1034 | EXPORT_SYMBOL(hci_resume_dev); | |
1035 | ||
76bca880 MH |
1036 | /* Receive frame from HCI drivers */ |
1037 | int hci_recv_frame(struct sk_buff *skb) | |
1038 | { | |
1039 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1040 | if (!hdev || (!test_bit(HCI_UP, &hdev->flags) | |
1041 | && !test_bit(HCI_INIT, &hdev->flags))) { | |
1042 | kfree_skb(skb); | |
1043 | return -ENXIO; | |
1044 | } | |
1045 | ||
1046 | /* Incomming skb */ | |
1047 | bt_cb(skb)->incoming = 1; | |
1048 | ||
1049 | /* Time stamp */ | |
1050 | __net_timestamp(skb); | |
1051 | ||
1052 | /* Queue frame for rx task */ | |
1053 | skb_queue_tail(&hdev->rx_q, skb); | |
c78ae283 MH |
1054 | tasklet_schedule(&hdev->rx_task); |
1055 | ||
76bca880 MH |
1056 | return 0; |
1057 | } | |
1058 | EXPORT_SYMBOL(hci_recv_frame); | |
1059 | ||
33e882a5 SS |
1060 | static int hci_reassembly(struct hci_dev *hdev, int type, void *data, |
1061 | int count, __u8 index, gfp_t gfp_mask) | |
1062 | { | |
1063 | int len = 0; | |
1064 | int hlen = 0; | |
1065 | int remain = count; | |
1066 | struct sk_buff *skb; | |
1067 | struct bt_skb_cb *scb; | |
1068 | ||
1069 | if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) || | |
1070 | index >= NUM_REASSEMBLY) | |
1071 | return -EILSEQ; | |
1072 | ||
1073 | skb = hdev->reassembly[index]; | |
1074 | ||
1075 | if (!skb) { | |
1076 | switch (type) { | |
1077 | case HCI_ACLDATA_PKT: | |
1078 | len = HCI_MAX_FRAME_SIZE; | |
1079 | hlen = HCI_ACL_HDR_SIZE; | |
1080 | break; | |
1081 | case HCI_EVENT_PKT: | |
1082 | len = HCI_MAX_EVENT_SIZE; | |
1083 | hlen = HCI_EVENT_HDR_SIZE; | |
1084 | break; | |
1085 | case HCI_SCODATA_PKT: | |
1086 | len = HCI_MAX_SCO_SIZE; | |
1087 | hlen = HCI_SCO_HDR_SIZE; | |
1088 | break; | |
1089 | } | |
1090 | ||
1091 | skb = bt_skb_alloc(len, gfp_mask); | |
1092 | if (!skb) | |
1093 | return -ENOMEM; | |
1094 | ||
1095 | scb = (void *) skb->cb; | |
1096 | scb->expect = hlen; | |
1097 | scb->pkt_type = type; | |
1098 | ||
1099 | skb->dev = (void *) hdev; | |
1100 | hdev->reassembly[index] = skb; | |
1101 | } | |
1102 | ||
1103 | while (count) { | |
1104 | scb = (void *) skb->cb; | |
1105 | len = min(scb->expect, (__u16)count); | |
1106 | ||
1107 | memcpy(skb_put(skb, len), data, len); | |
1108 | ||
1109 | count -= len; | |
1110 | data += len; | |
1111 | scb->expect -= len; | |
1112 | remain = count; | |
1113 | ||
1114 | switch (type) { | |
1115 | case HCI_EVENT_PKT: | |
1116 | if (skb->len == HCI_EVENT_HDR_SIZE) { | |
1117 | struct hci_event_hdr *h = hci_event_hdr(skb); | |
1118 | scb->expect = h->plen; | |
1119 | ||
1120 | if (skb_tailroom(skb) < scb->expect) { | |
1121 | kfree_skb(skb); | |
1122 | hdev->reassembly[index] = NULL; | |
1123 | return -ENOMEM; | |
1124 | } | |
1125 | } | |
1126 | break; | |
1127 | ||
1128 | case HCI_ACLDATA_PKT: | |
1129 | if (skb->len == HCI_ACL_HDR_SIZE) { | |
1130 | struct hci_acl_hdr *h = hci_acl_hdr(skb); | |
1131 | scb->expect = __le16_to_cpu(h->dlen); | |
1132 | ||
1133 | if (skb_tailroom(skb) < scb->expect) { | |
1134 | kfree_skb(skb); | |
1135 | hdev->reassembly[index] = NULL; | |
1136 | return -ENOMEM; | |
1137 | } | |
1138 | } | |
1139 | break; | |
1140 | ||
1141 | case HCI_SCODATA_PKT: | |
1142 | if (skb->len == HCI_SCO_HDR_SIZE) { | |
1143 | struct hci_sco_hdr *h = hci_sco_hdr(skb); | |
1144 | scb->expect = h->dlen; | |
1145 | ||
1146 | if (skb_tailroom(skb) < scb->expect) { | |
1147 | kfree_skb(skb); | |
1148 | hdev->reassembly[index] = NULL; | |
1149 | return -ENOMEM; | |
1150 | } | |
1151 | } | |
1152 | break; | |
1153 | } | |
1154 | ||
1155 | if (scb->expect == 0) { | |
1156 | /* Complete frame */ | |
1157 | ||
1158 | bt_cb(skb)->pkt_type = type; | |
1159 | hci_recv_frame(skb); | |
1160 | ||
1161 | hdev->reassembly[index] = NULL; | |
1162 | return remain; | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | return remain; | |
1167 | } | |
1168 | ||
ef222013 MH |
1169 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) |
1170 | { | |
f39a3c06 SS |
1171 | int rem = 0; |
1172 | ||
ef222013 MH |
1173 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) |
1174 | return -EILSEQ; | |
1175 | ||
da5f6c37 | 1176 | while (count) { |
f39a3c06 SS |
1177 | rem = hci_reassembly(hdev, type, data, count, |
1178 | type - 1, GFP_ATOMIC); | |
1179 | if (rem < 0) | |
1180 | return rem; | |
ef222013 | 1181 | |
f39a3c06 SS |
1182 | data += (count - rem); |
1183 | count = rem; | |
da5f6c37 | 1184 | }; |
ef222013 | 1185 | |
f39a3c06 | 1186 | return rem; |
ef222013 MH |
1187 | } |
1188 | EXPORT_SYMBOL(hci_recv_fragment); | |
1189 | ||
99811510 SS |
1190 | #define STREAM_REASSEMBLY 0 |
1191 | ||
1192 | int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count) | |
1193 | { | |
1194 | int type; | |
1195 | int rem = 0; | |
1196 | ||
da5f6c37 | 1197 | while (count) { |
99811510 SS |
1198 | struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY]; |
1199 | ||
1200 | if (!skb) { | |
1201 | struct { char type; } *pkt; | |
1202 | ||
1203 | /* Start of the frame */ | |
1204 | pkt = data; | |
1205 | type = pkt->type; | |
1206 | ||
1207 | data++; | |
1208 | count--; | |
1209 | } else | |
1210 | type = bt_cb(skb)->pkt_type; | |
1211 | ||
1212 | rem = hci_reassembly(hdev, type, data, | |
1213 | count, STREAM_REASSEMBLY, GFP_ATOMIC); | |
1214 | if (rem < 0) | |
1215 | return rem; | |
1216 | ||
1217 | data += (count - rem); | |
1218 | count = rem; | |
da5f6c37 | 1219 | }; |
99811510 SS |
1220 | |
1221 | return rem; | |
1222 | } | |
1223 | EXPORT_SYMBOL(hci_recv_stream_fragment); | |
1224 | ||
1da177e4 LT |
1225 | /* ---- Interface to upper protocols ---- */ |
1226 | ||
1227 | /* Register/Unregister protocols. | |
1228 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1229 | int hci_register_proto(struct hci_proto *hp) | |
1230 | { | |
1231 | int err = 0; | |
1232 | ||
1233 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1234 | ||
1235 | if (hp->id >= HCI_MAX_PROTO) | |
1236 | return -EINVAL; | |
1237 | ||
1238 | write_lock_bh(&hci_task_lock); | |
1239 | ||
1240 | if (!hci_proto[hp->id]) | |
1241 | hci_proto[hp->id] = hp; | |
1242 | else | |
1243 | err = -EEXIST; | |
1244 | ||
1245 | write_unlock_bh(&hci_task_lock); | |
1246 | ||
1247 | return err; | |
1248 | } | |
1249 | EXPORT_SYMBOL(hci_register_proto); | |
1250 | ||
1251 | int hci_unregister_proto(struct hci_proto *hp) | |
1252 | { | |
1253 | int err = 0; | |
1254 | ||
1255 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1256 | ||
1257 | if (hp->id >= HCI_MAX_PROTO) | |
1258 | return -EINVAL; | |
1259 | ||
1260 | write_lock_bh(&hci_task_lock); | |
1261 | ||
1262 | if (hci_proto[hp->id]) | |
1263 | hci_proto[hp->id] = NULL; | |
1264 | else | |
1265 | err = -ENOENT; | |
1266 | ||
1267 | write_unlock_bh(&hci_task_lock); | |
1268 | ||
1269 | return err; | |
1270 | } | |
1271 | EXPORT_SYMBOL(hci_unregister_proto); | |
1272 | ||
1273 | int hci_register_cb(struct hci_cb *cb) | |
1274 | { | |
1275 | BT_DBG("%p name %s", cb, cb->name); | |
1276 | ||
1277 | write_lock_bh(&hci_cb_list_lock); | |
1278 | list_add(&cb->list, &hci_cb_list); | |
1279 | write_unlock_bh(&hci_cb_list_lock); | |
1280 | ||
1281 | return 0; | |
1282 | } | |
1283 | EXPORT_SYMBOL(hci_register_cb); | |
1284 | ||
1285 | int hci_unregister_cb(struct hci_cb *cb) | |
1286 | { | |
1287 | BT_DBG("%p name %s", cb, cb->name); | |
1288 | ||
1289 | write_lock_bh(&hci_cb_list_lock); | |
1290 | list_del(&cb->list); | |
1291 | write_unlock_bh(&hci_cb_list_lock); | |
1292 | ||
1293 | return 0; | |
1294 | } | |
1295 | EXPORT_SYMBOL(hci_unregister_cb); | |
1296 | ||
1297 | static int hci_send_frame(struct sk_buff *skb) | |
1298 | { | |
1299 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1300 | ||
1301 | if (!hdev) { | |
1302 | kfree_skb(skb); | |
1303 | return -ENODEV; | |
1304 | } | |
1305 | ||
0d48d939 | 1306 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1307 | |
1308 | if (atomic_read(&hdev->promisc)) { | |
1309 | /* Time stamp */ | |
a61bbcf2 | 1310 | __net_timestamp(skb); |
1da177e4 LT |
1311 | |
1312 | hci_send_to_sock(hdev, skb); | |
1313 | } | |
1314 | ||
1315 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1316 | skb_orphan(skb); | |
1317 | ||
1318 | return hdev->send(skb); | |
1319 | } | |
1320 | ||
1321 | /* Send HCI command */ | |
a9de9248 | 1322 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1323 | { |
1324 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1325 | struct hci_command_hdr *hdr; | |
1326 | struct sk_buff *skb; | |
1327 | ||
a9de9248 | 1328 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1329 | |
1330 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1331 | if (!skb) { | |
ef222013 | 1332 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1333 | return -ENOMEM; |
1334 | } | |
1335 | ||
1336 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1337 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1338 | hdr->plen = plen; |
1339 | ||
1340 | if (plen) | |
1341 | memcpy(skb_put(skb, plen), param, plen); | |
1342 | ||
1343 | BT_DBG("skb len %d", skb->len); | |
1344 | ||
0d48d939 | 1345 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 1346 | skb->dev = (void *) hdev; |
c78ae283 | 1347 | |
1da177e4 | 1348 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 1349 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
1350 | |
1351 | return 0; | |
1352 | } | |
1da177e4 LT |
1353 | |
1354 | /* Get data from the previously sent command */ | |
a9de9248 | 1355 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1356 | { |
1357 | struct hci_command_hdr *hdr; | |
1358 | ||
1359 | if (!hdev->sent_cmd) | |
1360 | return NULL; | |
1361 | ||
1362 | hdr = (void *) hdev->sent_cmd->data; | |
1363 | ||
a9de9248 | 1364 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1365 | return NULL; |
1366 | ||
a9de9248 | 1367 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1368 | |
1369 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1370 | } | |
1371 | ||
1372 | /* Send ACL data */ | |
1373 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1374 | { | |
1375 | struct hci_acl_hdr *hdr; | |
1376 | int len = skb->len; | |
1377 | ||
badff6d0 ACM |
1378 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1379 | skb_reset_transport_header(skb); | |
9c70220b | 1380 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1381 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1382 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1383 | } |
1384 | ||
9a9c6a34 | 1385 | void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) |
1da177e4 LT |
1386 | { |
1387 | struct hci_dev *hdev = conn->hdev; | |
1388 | struct sk_buff *list; | |
1389 | ||
1390 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); | |
1391 | ||
1392 | skb->dev = (void *) hdev; | |
0d48d939 | 1393 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1394 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_START); |
1395 | ||
70f23020 AE |
1396 | list = skb_shinfo(skb)->frag_list; |
1397 | if (!list) { | |
1da177e4 LT |
1398 | /* Non fragmented */ |
1399 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1400 | ||
1401 | skb_queue_tail(&conn->data_q, skb); | |
1402 | } else { | |
1403 | /* Fragmented */ | |
1404 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1405 | ||
1406 | skb_shinfo(skb)->frag_list = NULL; | |
1407 | ||
1408 | /* Queue all fragments atomically */ | |
1409 | spin_lock_bh(&conn->data_q.lock); | |
1410 | ||
1411 | __skb_queue_tail(&conn->data_q, skb); | |
1412 | do { | |
1413 | skb = list; list = list->next; | |
8e87d142 | 1414 | |
1da177e4 | 1415 | skb->dev = (void *) hdev; |
0d48d939 | 1416 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
1da177e4 LT |
1417 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT); |
1418 | ||
1419 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1420 | ||
1421 | __skb_queue_tail(&conn->data_q, skb); | |
1422 | } while (list); | |
1423 | ||
1424 | spin_unlock_bh(&conn->data_q.lock); | |
1425 | } | |
1426 | ||
c78ae283 | 1427 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
1428 | } |
1429 | EXPORT_SYMBOL(hci_send_acl); | |
1430 | ||
1431 | /* Send SCO data */ | |
0d861d8b | 1432 | void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
1433 | { |
1434 | struct hci_dev *hdev = conn->hdev; | |
1435 | struct hci_sco_hdr hdr; | |
1436 | ||
1437 | BT_DBG("%s len %d", hdev->name, skb->len); | |
1438 | ||
aca3192c | 1439 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
1440 | hdr.dlen = skb->len; |
1441 | ||
badff6d0 ACM |
1442 | skb_push(skb, HCI_SCO_HDR_SIZE); |
1443 | skb_reset_transport_header(skb); | |
9c70220b | 1444 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
1445 | |
1446 | skb->dev = (void *) hdev; | |
0d48d939 | 1447 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
c78ae283 | 1448 | |
1da177e4 | 1449 | skb_queue_tail(&conn->data_q, skb); |
c78ae283 | 1450 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
1451 | } |
1452 | EXPORT_SYMBOL(hci_send_sco); | |
1453 | ||
1454 | /* ---- HCI TX task (outgoing data) ---- */ | |
1455 | ||
1456 | /* HCI Connection scheduler */ | |
1457 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
1458 | { | |
1459 | struct hci_conn_hash *h = &hdev->conn_hash; | |
5b7f9909 | 1460 | struct hci_conn *conn = NULL; |
1da177e4 LT |
1461 | int num = 0, min = ~0; |
1462 | struct list_head *p; | |
1463 | ||
8e87d142 | 1464 | /* We don't have to lock device here. Connections are always |
1da177e4 LT |
1465 | * added and removed with TX task disabled. */ |
1466 | list_for_each(p, &h->list) { | |
1467 | struct hci_conn *c; | |
1468 | c = list_entry(p, struct hci_conn, list); | |
1469 | ||
769be974 | 1470 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 1471 | continue; |
769be974 MH |
1472 | |
1473 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
1474 | continue; | |
1475 | ||
1da177e4 LT |
1476 | num++; |
1477 | ||
1478 | if (c->sent < min) { | |
1479 | min = c->sent; | |
1480 | conn = c; | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | if (conn) { | |
1485 | int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt); | |
1486 | int q = cnt / num; | |
1487 | *quote = q ? q : 1; | |
1488 | } else | |
1489 | *quote = 0; | |
1490 | ||
1491 | BT_DBG("conn %p quote %d", conn, *quote); | |
1492 | return conn; | |
1493 | } | |
1494 | ||
1495 | static inline void hci_acl_tx_to(struct hci_dev *hdev) | |
1496 | { | |
1497 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1498 | struct list_head *p; | |
1499 | struct hci_conn *c; | |
1500 | ||
1501 | BT_ERR("%s ACL tx timeout", hdev->name); | |
1502 | ||
1503 | /* Kill stalled connections */ | |
1504 | list_for_each(p, &h->list) { | |
1505 | c = list_entry(p, struct hci_conn, list); | |
1506 | if (c->type == ACL_LINK && c->sent) { | |
1507 | BT_ERR("%s killing stalled ACL connection %s", | |
1508 | hdev->name, batostr(&c->dst)); | |
1509 | hci_acl_disconn(c, 0x13); | |
1510 | } | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
1515 | { | |
1516 | struct hci_conn *conn; | |
1517 | struct sk_buff *skb; | |
1518 | int quote; | |
1519 | ||
1520 | BT_DBG("%s", hdev->name); | |
1521 | ||
1522 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1523 | /* ACL tx timeout must be longer than maximum | |
1524 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 1525 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
1da177e4 LT |
1526 | hci_acl_tx_to(hdev); |
1527 | } | |
1528 | ||
1529 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { | |
1530 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1531 | BT_DBG("skb %p len %d", skb, skb->len); | |
04837f64 MH |
1532 | |
1533 | hci_conn_enter_active_mode(conn); | |
1534 | ||
1da177e4 LT |
1535 | hci_send_frame(skb); |
1536 | hdev->acl_last_tx = jiffies; | |
1537 | ||
1538 | hdev->acl_cnt--; | |
1539 | conn->sent++; | |
1540 | } | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | /* Schedule SCO */ | |
1545 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
1546 | { | |
1547 | struct hci_conn *conn; | |
1548 | struct sk_buff *skb; | |
1549 | int quote; | |
1550 | ||
1551 | BT_DBG("%s", hdev->name); | |
1552 | ||
1553 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { | |
1554 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1555 | BT_DBG("skb %p len %d", skb, skb->len); | |
1556 | hci_send_frame(skb); | |
1557 | ||
1558 | conn->sent++; | |
1559 | if (conn->sent == ~0) | |
1560 | conn->sent = 0; | |
1561 | } | |
1562 | } | |
1563 | } | |
1564 | ||
b6a0dc82 MH |
1565 | static inline void hci_sched_esco(struct hci_dev *hdev) |
1566 | { | |
1567 | struct hci_conn *conn; | |
1568 | struct sk_buff *skb; | |
1569 | int quote; | |
1570 | ||
1571 | BT_DBG("%s", hdev->name); | |
1572 | ||
1573 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { | |
1574 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1575 | BT_DBG("skb %p len %d", skb, skb->len); | |
1576 | hci_send_frame(skb); | |
1577 | ||
1578 | conn->sent++; | |
1579 | if (conn->sent == ~0) | |
1580 | conn->sent = 0; | |
1581 | } | |
1582 | } | |
1583 | } | |
1584 | ||
1da177e4 LT |
1585 | static void hci_tx_task(unsigned long arg) |
1586 | { | |
1587 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1588 | struct sk_buff *skb; | |
1589 | ||
1590 | read_lock(&hci_task_lock); | |
1591 | ||
1592 | BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt); | |
1593 | ||
1594 | /* Schedule queues and send stuff to HCI driver */ | |
1595 | ||
1596 | hci_sched_acl(hdev); | |
1597 | ||
1598 | hci_sched_sco(hdev); | |
1599 | ||
b6a0dc82 MH |
1600 | hci_sched_esco(hdev); |
1601 | ||
1da177e4 LT |
1602 | /* Send next queued raw (unknown type) packet */ |
1603 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
1604 | hci_send_frame(skb); | |
1605 | ||
1606 | read_unlock(&hci_task_lock); | |
1607 | } | |
1608 | ||
1609 | /* ----- HCI RX task (incoming data proccessing) ----- */ | |
1610 | ||
1611 | /* ACL data packet */ | |
1612 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1613 | { | |
1614 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
1615 | struct hci_conn *conn; | |
1616 | __u16 handle, flags; | |
1617 | ||
1618 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
1619 | ||
1620 | handle = __le16_to_cpu(hdr->handle); | |
1621 | flags = hci_flags(handle); | |
1622 | handle = hci_handle(handle); | |
1623 | ||
1624 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
1625 | ||
1626 | hdev->stat.acl_rx++; | |
1627 | ||
1628 | hci_dev_lock(hdev); | |
1629 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1630 | hci_dev_unlock(hdev); | |
8e87d142 | 1631 | |
1da177e4 LT |
1632 | if (conn) { |
1633 | register struct hci_proto *hp; | |
1634 | ||
04837f64 MH |
1635 | hci_conn_enter_active_mode(conn); |
1636 | ||
1da177e4 | 1637 | /* Send to upper protocol */ |
70f23020 AE |
1638 | hp = hci_proto[HCI_PROTO_L2CAP]; |
1639 | if (hp && hp->recv_acldata) { | |
1da177e4 LT |
1640 | hp->recv_acldata(conn, skb, flags); |
1641 | return; | |
1642 | } | |
1643 | } else { | |
8e87d142 | 1644 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
1645 | hdev->name, handle); |
1646 | } | |
1647 | ||
1648 | kfree_skb(skb); | |
1649 | } | |
1650 | ||
1651 | /* SCO data packet */ | |
1652 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1653 | { | |
1654 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
1655 | struct hci_conn *conn; | |
1656 | __u16 handle; | |
1657 | ||
1658 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
1659 | ||
1660 | handle = __le16_to_cpu(hdr->handle); | |
1661 | ||
1662 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
1663 | ||
1664 | hdev->stat.sco_rx++; | |
1665 | ||
1666 | hci_dev_lock(hdev); | |
1667 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1668 | hci_dev_unlock(hdev); | |
1669 | ||
1670 | if (conn) { | |
1671 | register struct hci_proto *hp; | |
1672 | ||
1673 | /* Send to upper protocol */ | |
70f23020 AE |
1674 | hp = hci_proto[HCI_PROTO_SCO]; |
1675 | if (hp && hp->recv_scodata) { | |
1da177e4 LT |
1676 | hp->recv_scodata(conn, skb); |
1677 | return; | |
1678 | } | |
1679 | } else { | |
8e87d142 | 1680 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
1681 | hdev->name, handle); |
1682 | } | |
1683 | ||
1684 | kfree_skb(skb); | |
1685 | } | |
1686 | ||
6516455d | 1687 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
1688 | { |
1689 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1690 | struct sk_buff *skb; | |
1691 | ||
1692 | BT_DBG("%s", hdev->name); | |
1693 | ||
1694 | read_lock(&hci_task_lock); | |
1695 | ||
1696 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
1697 | if (atomic_read(&hdev->promisc)) { | |
1698 | /* Send copy to the sockets */ | |
1699 | hci_send_to_sock(hdev, skb); | |
1700 | } | |
1701 | ||
1702 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
1703 | kfree_skb(skb); | |
1704 | continue; | |
1705 | } | |
1706 | ||
1707 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
1708 | /* Don't process data packets in this states. */ | |
0d48d939 | 1709 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1710 | case HCI_ACLDATA_PKT: |
1711 | case HCI_SCODATA_PKT: | |
1712 | kfree_skb(skb); | |
1713 | continue; | |
3ff50b79 | 1714 | } |
1da177e4 LT |
1715 | } |
1716 | ||
1717 | /* Process frame */ | |
0d48d939 | 1718 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1719 | case HCI_EVENT_PKT: |
1720 | hci_event_packet(hdev, skb); | |
1721 | break; | |
1722 | ||
1723 | case HCI_ACLDATA_PKT: | |
1724 | BT_DBG("%s ACL data packet", hdev->name); | |
1725 | hci_acldata_packet(hdev, skb); | |
1726 | break; | |
1727 | ||
1728 | case HCI_SCODATA_PKT: | |
1729 | BT_DBG("%s SCO data packet", hdev->name); | |
1730 | hci_scodata_packet(hdev, skb); | |
1731 | break; | |
1732 | ||
1733 | default: | |
1734 | kfree_skb(skb); | |
1735 | break; | |
1736 | } | |
1737 | } | |
1738 | ||
1739 | read_unlock(&hci_task_lock); | |
1740 | } | |
1741 | ||
1742 | static void hci_cmd_task(unsigned long arg) | |
1743 | { | |
1744 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1745 | struct sk_buff *skb; | |
1746 | ||
1747 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
1748 | ||
82453021 | 1749 | if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) { |
1da177e4 LT |
1750 | BT_ERR("%s command tx timeout", hdev->name); |
1751 | atomic_set(&hdev->cmd_cnt, 1); | |
1752 | } | |
1753 | ||
1754 | /* Send queued commands */ | |
1755 | if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) { | |
7585b97a | 1756 | kfree_skb(hdev->sent_cmd); |
1da177e4 | 1757 | |
70f23020 AE |
1758 | hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC); |
1759 | if (hdev->sent_cmd) { | |
1da177e4 LT |
1760 | atomic_dec(&hdev->cmd_cnt); |
1761 | hci_send_frame(skb); | |
1762 | hdev->cmd_last_tx = jiffies; | |
1763 | } else { | |
1764 | skb_queue_head(&hdev->cmd_q, skb); | |
c78ae283 | 1765 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
1766 | } |
1767 | } | |
1768 | } |