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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> | |
f48fd9c8 | 40 | #include <linux/workqueue.h> |
1da177e4 LT |
41 | #include <linux/interrupt.h> |
42 | #include <linux/notifier.h> | |
611b30f7 | 43 | #include <linux/rfkill.h> |
6bd32326 | 44 | #include <linux/timer.h> |
1da177e4 LT |
45 | #include <net/sock.h> |
46 | ||
47 | #include <asm/system.h> | |
70f23020 | 48 | #include <linux/uaccess.h> |
1da177e4 LT |
49 | #include <asm/unaligned.h> |
50 | ||
51 | #include <net/bluetooth/bluetooth.h> | |
52 | #include <net/bluetooth/hci_core.h> | |
53 | ||
ab81cbf9 JH |
54 | #define AUTO_OFF_TIMEOUT 2000 |
55 | ||
1da177e4 LT |
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); | |
1da177e4 LT |
59 | |
60 | static DEFINE_RWLOCK(hci_task_lock); | |
61 | ||
62 | /* HCI device list */ | |
63 | LIST_HEAD(hci_dev_list); | |
64 | DEFINE_RWLOCK(hci_dev_list_lock); | |
65 | ||
66 | /* HCI callback list */ | |
67 | LIST_HEAD(hci_cb_list); | |
68 | DEFINE_RWLOCK(hci_cb_list_lock); | |
69 | ||
70 | /* HCI protocols */ | |
71 | #define HCI_MAX_PROTO 2 | |
72 | struct hci_proto *hci_proto[HCI_MAX_PROTO]; | |
73 | ||
74 | /* HCI notifiers list */ | |
e041c683 | 75 | static ATOMIC_NOTIFIER_HEAD(hci_notifier); |
1da177e4 LT |
76 | |
77 | /* ---- HCI notifications ---- */ | |
78 | ||
79 | int hci_register_notifier(struct notifier_block *nb) | |
80 | { | |
e041c683 | 81 | return atomic_notifier_chain_register(&hci_notifier, nb); |
1da177e4 LT |
82 | } |
83 | ||
84 | int hci_unregister_notifier(struct notifier_block *nb) | |
85 | { | |
e041c683 | 86 | return atomic_notifier_chain_unregister(&hci_notifier, nb); |
1da177e4 LT |
87 | } |
88 | ||
6516455d | 89 | static void hci_notify(struct hci_dev *hdev, int event) |
1da177e4 | 90 | { |
e041c683 | 91 | atomic_notifier_call_chain(&hci_notifier, event, hdev); |
1da177e4 LT |
92 | } |
93 | ||
94 | /* ---- HCI requests ---- */ | |
95 | ||
23bb5763 | 96 | void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result) |
1da177e4 | 97 | { |
23bb5763 JH |
98 | BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result); |
99 | ||
a5040efa JH |
100 | /* If this is the init phase check if the completed command matches |
101 | * the last init command, and if not just return. | |
102 | */ | |
103 | if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) | |
23bb5763 | 104 | return; |
1da177e4 LT |
105 | |
106 | if (hdev->req_status == HCI_REQ_PEND) { | |
107 | hdev->req_result = result; | |
108 | hdev->req_status = HCI_REQ_DONE; | |
109 | wake_up_interruptible(&hdev->req_wait_q); | |
110 | } | |
111 | } | |
112 | ||
113 | static void hci_req_cancel(struct hci_dev *hdev, int err) | |
114 | { | |
115 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
116 | ||
117 | if (hdev->req_status == HCI_REQ_PEND) { | |
118 | hdev->req_result = err; | |
119 | hdev->req_status = HCI_REQ_CANCELED; | |
120 | wake_up_interruptible(&hdev->req_wait_q); | |
121 | } | |
122 | } | |
123 | ||
124 | /* Execute request and wait for completion. */ | |
8e87d142 | 125 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
01df8c31 | 126 | unsigned long opt, __u32 timeout) |
1da177e4 LT |
127 | { |
128 | DECLARE_WAITQUEUE(wait, current); | |
129 | int err = 0; | |
130 | ||
131 | BT_DBG("%s start", hdev->name); | |
132 | ||
133 | hdev->req_status = HCI_REQ_PEND; | |
134 | ||
135 | add_wait_queue(&hdev->req_wait_q, &wait); | |
136 | set_current_state(TASK_INTERRUPTIBLE); | |
137 | ||
138 | req(hdev, opt); | |
139 | schedule_timeout(timeout); | |
140 | ||
141 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
142 | ||
143 | if (signal_pending(current)) | |
144 | return -EINTR; | |
145 | ||
146 | switch (hdev->req_status) { | |
147 | case HCI_REQ_DONE: | |
148 | err = -bt_err(hdev->req_result); | |
149 | break; | |
150 | ||
151 | case HCI_REQ_CANCELED: | |
152 | err = -hdev->req_result; | |
153 | break; | |
154 | ||
155 | default: | |
156 | err = -ETIMEDOUT; | |
157 | break; | |
3ff50b79 | 158 | } |
1da177e4 | 159 | |
a5040efa | 160 | hdev->req_status = hdev->req_result = 0; |
1da177e4 LT |
161 | |
162 | BT_DBG("%s end: err %d", hdev->name, err); | |
163 | ||
164 | return err; | |
165 | } | |
166 | ||
167 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), | |
01df8c31 | 168 | unsigned long opt, __u32 timeout) |
1da177e4 LT |
169 | { |
170 | int ret; | |
171 | ||
7c6a329e MH |
172 | if (!test_bit(HCI_UP, &hdev->flags)) |
173 | return -ENETDOWN; | |
174 | ||
1da177e4 LT |
175 | /* Serialize all requests */ |
176 | hci_req_lock(hdev); | |
177 | ret = __hci_request(hdev, req, opt, timeout); | |
178 | hci_req_unlock(hdev); | |
179 | ||
180 | return ret; | |
181 | } | |
182 | ||
183 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) | |
184 | { | |
185 | BT_DBG("%s %ld", hdev->name, opt); | |
186 | ||
187 | /* Reset device */ | |
a9de9248 | 188 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
189 | } |
190 | ||
191 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) | |
192 | { | |
b0916ea0 | 193 | struct hci_cp_delete_stored_link_key cp; |
1da177e4 | 194 | struct sk_buff *skb; |
1ebb9252 | 195 | __le16 param; |
89f2783d | 196 | __u8 flt_type; |
1da177e4 LT |
197 | |
198 | BT_DBG("%s %ld", hdev->name, opt); | |
199 | ||
200 | /* Driver initialization */ | |
201 | ||
202 | /* Special commands */ | |
203 | while ((skb = skb_dequeue(&hdev->driver_init))) { | |
0d48d939 | 204 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 205 | skb->dev = (void *) hdev; |
c78ae283 | 206 | |
1da177e4 | 207 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 208 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
209 | } |
210 | skb_queue_purge(&hdev->driver_init); | |
211 | ||
212 | /* Mandatory initialization */ | |
213 | ||
214 | /* Reset */ | |
7a9d4020 | 215 | if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) |
a9de9248 | 216 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
217 | |
218 | /* Read Local Supported Features */ | |
a9de9248 | 219 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
1da177e4 | 220 | |
1143e5a6 | 221 | /* Read Local Version */ |
a9de9248 | 222 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
1143e5a6 | 223 | |
1da177e4 | 224 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
a9de9248 | 225 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
1da177e4 LT |
226 | |
227 | #if 0 | |
228 | /* Host buffer size */ | |
229 | { | |
230 | struct hci_cp_host_buffer_size cp; | |
aca3192c | 231 | cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE); |
1da177e4 | 232 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
aca3192c YH |
233 | cp.acl_max_pkt = cpu_to_le16(0xffff); |
234 | cp.sco_max_pkt = cpu_to_le16(0xffff); | |
a9de9248 | 235 | hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
1da177e4 LT |
236 | } |
237 | #endif | |
238 | ||
239 | /* Read BD Address */ | |
a9de9248 MH |
240 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
241 | ||
242 | /* Read Class of Device */ | |
243 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); | |
244 | ||
245 | /* Read Local Name */ | |
246 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); | |
1da177e4 LT |
247 | |
248 | /* Read Voice Setting */ | |
a9de9248 | 249 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
1da177e4 LT |
250 | |
251 | /* Optional initialization */ | |
252 | ||
253 | /* Clear Event Filters */ | |
89f2783d | 254 | flt_type = HCI_FLT_CLEAR_ALL; |
a9de9248 | 255 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
1da177e4 | 256 | |
1da177e4 | 257 | /* Connection accept timeout ~20 secs */ |
aca3192c | 258 | param = cpu_to_le16(0x7d00); |
a9de9248 | 259 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
b0916ea0 JH |
260 | |
261 | bacpy(&cp.bdaddr, BDADDR_ANY); | |
262 | cp.delete_all = 1; | |
263 | hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp); | |
1da177e4 LT |
264 | } |
265 | ||
6ed58ec5 VT |
266 | static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt) |
267 | { | |
268 | BT_DBG("%s", hdev->name); | |
269 | ||
270 | /* Read LE buffer size */ | |
271 | hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL); | |
272 | } | |
273 | ||
1da177e4 LT |
274 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) |
275 | { | |
276 | __u8 scan = opt; | |
277 | ||
278 | BT_DBG("%s %x", hdev->name, scan); | |
279 | ||
280 | /* Inquiry and Page scans */ | |
a9de9248 | 281 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1da177e4 LT |
282 | } |
283 | ||
284 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
285 | { | |
286 | __u8 auth = opt; | |
287 | ||
288 | BT_DBG("%s %x", hdev->name, auth); | |
289 | ||
290 | /* Authentication */ | |
a9de9248 | 291 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
1da177e4 LT |
292 | } |
293 | ||
294 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
295 | { | |
296 | __u8 encrypt = opt; | |
297 | ||
298 | BT_DBG("%s %x", hdev->name, encrypt); | |
299 | ||
e4e8e37c | 300 | /* Encryption */ |
a9de9248 | 301 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
1da177e4 LT |
302 | } |
303 | ||
e4e8e37c MH |
304 | static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
305 | { | |
306 | __le16 policy = cpu_to_le16(opt); | |
307 | ||
a418b893 | 308 | BT_DBG("%s %x", hdev->name, policy); |
e4e8e37c MH |
309 | |
310 | /* Default link policy */ | |
311 | hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); | |
312 | } | |
313 | ||
8e87d142 | 314 | /* Get HCI device by index. |
1da177e4 LT |
315 | * Device is held on return. */ |
316 | struct hci_dev *hci_dev_get(int index) | |
317 | { | |
318 | struct hci_dev *hdev = NULL; | |
319 | struct list_head *p; | |
320 | ||
321 | BT_DBG("%d", index); | |
322 | ||
323 | if (index < 0) | |
324 | return NULL; | |
325 | ||
326 | read_lock(&hci_dev_list_lock); | |
327 | list_for_each(p, &hci_dev_list) { | |
328 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
329 | if (d->id == index) { | |
330 | hdev = hci_dev_hold(d); | |
331 | break; | |
332 | } | |
333 | } | |
334 | read_unlock(&hci_dev_list_lock); | |
335 | return hdev; | |
336 | } | |
1da177e4 LT |
337 | |
338 | /* ---- Inquiry support ---- */ | |
339 | static void inquiry_cache_flush(struct hci_dev *hdev) | |
340 | { | |
341 | struct inquiry_cache *cache = &hdev->inq_cache; | |
342 | struct inquiry_entry *next = cache->list, *e; | |
343 | ||
344 | BT_DBG("cache %p", cache); | |
345 | ||
346 | cache->list = NULL; | |
347 | while ((e = next)) { | |
348 | next = e->next; | |
349 | kfree(e); | |
350 | } | |
351 | } | |
352 | ||
353 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
354 | { | |
355 | struct inquiry_cache *cache = &hdev->inq_cache; | |
356 | struct inquiry_entry *e; | |
357 | ||
358 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
359 | ||
360 | for (e = cache->list; e; e = e->next) | |
361 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
362 | break; | |
363 | return e; | |
364 | } | |
365 | ||
366 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) | |
367 | { | |
368 | struct inquiry_cache *cache = &hdev->inq_cache; | |
70f23020 | 369 | struct inquiry_entry *ie; |
1da177e4 LT |
370 | |
371 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
372 | ||
70f23020 AE |
373 | ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr); |
374 | if (!ie) { | |
1da177e4 | 375 | /* Entry not in the cache. Add new one. */ |
70f23020 AE |
376 | ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC); |
377 | if (!ie) | |
1da177e4 | 378 | return; |
70f23020 AE |
379 | |
380 | ie->next = cache->list; | |
381 | cache->list = ie; | |
1da177e4 LT |
382 | } |
383 | ||
70f23020 AE |
384 | memcpy(&ie->data, data, sizeof(*data)); |
385 | ie->timestamp = jiffies; | |
1da177e4 LT |
386 | cache->timestamp = jiffies; |
387 | } | |
388 | ||
389 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
390 | { | |
391 | struct inquiry_cache *cache = &hdev->inq_cache; | |
392 | struct inquiry_info *info = (struct inquiry_info *) buf; | |
393 | struct inquiry_entry *e; | |
394 | int copied = 0; | |
395 | ||
396 | for (e = cache->list; e && copied < num; e = e->next, copied++) { | |
397 | struct inquiry_data *data = &e->data; | |
398 | bacpy(&info->bdaddr, &data->bdaddr); | |
399 | info->pscan_rep_mode = data->pscan_rep_mode; | |
400 | info->pscan_period_mode = data->pscan_period_mode; | |
401 | info->pscan_mode = data->pscan_mode; | |
402 | memcpy(info->dev_class, data->dev_class, 3); | |
403 | info->clock_offset = data->clock_offset; | |
404 | info++; | |
405 | } | |
406 | ||
407 | BT_DBG("cache %p, copied %d", cache, copied); | |
408 | return copied; | |
409 | } | |
410 | ||
411 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
412 | { | |
413 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
414 | struct hci_cp_inquiry cp; | |
415 | ||
416 | BT_DBG("%s", hdev->name); | |
417 | ||
418 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
419 | return; | |
420 | ||
421 | /* Start Inquiry */ | |
422 | memcpy(&cp.lap, &ir->lap, 3); | |
423 | cp.length = ir->length; | |
424 | cp.num_rsp = ir->num_rsp; | |
a9de9248 | 425 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
1da177e4 LT |
426 | } |
427 | ||
428 | int hci_inquiry(void __user *arg) | |
429 | { | |
430 | __u8 __user *ptr = arg; | |
431 | struct hci_inquiry_req ir; | |
432 | struct hci_dev *hdev; | |
433 | int err = 0, do_inquiry = 0, max_rsp; | |
434 | long timeo; | |
435 | __u8 *buf; | |
436 | ||
437 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
438 | return -EFAULT; | |
439 | ||
5a08ecce AE |
440 | hdev = hci_dev_get(ir.dev_id); |
441 | if (!hdev) | |
1da177e4 LT |
442 | return -ENODEV; |
443 | ||
444 | hci_dev_lock_bh(hdev); | |
8e87d142 | 445 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
70f23020 AE |
446 | inquiry_cache_empty(hdev) || |
447 | ir.flags & IREQ_CACHE_FLUSH) { | |
1da177e4 LT |
448 | inquiry_cache_flush(hdev); |
449 | do_inquiry = 1; | |
450 | } | |
451 | hci_dev_unlock_bh(hdev); | |
452 | ||
04837f64 | 453 | timeo = ir.length * msecs_to_jiffies(2000); |
70f23020 AE |
454 | |
455 | if (do_inquiry) { | |
456 | err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo); | |
457 | if (err < 0) | |
458 | goto done; | |
459 | } | |
1da177e4 LT |
460 | |
461 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
462 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
463 | ||
464 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
465 | * copy it to the user space. | |
466 | */ | |
01df8c31 | 467 | buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL); |
70f23020 | 468 | if (!buf) { |
1da177e4 LT |
469 | err = -ENOMEM; |
470 | goto done; | |
471 | } | |
472 | ||
473 | hci_dev_lock_bh(hdev); | |
474 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); | |
475 | hci_dev_unlock_bh(hdev); | |
476 | ||
477 | BT_DBG("num_rsp %d", ir.num_rsp); | |
478 | ||
479 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
480 | ptr += sizeof(ir); | |
481 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
482 | ir.num_rsp)) | |
483 | err = -EFAULT; | |
8e87d142 | 484 | } else |
1da177e4 LT |
485 | err = -EFAULT; |
486 | ||
487 | kfree(buf); | |
488 | ||
489 | done: | |
490 | hci_dev_put(hdev); | |
491 | return err; | |
492 | } | |
493 | ||
494 | /* ---- HCI ioctl helpers ---- */ | |
495 | ||
496 | int hci_dev_open(__u16 dev) | |
497 | { | |
498 | struct hci_dev *hdev; | |
499 | int ret = 0; | |
500 | ||
5a08ecce AE |
501 | hdev = hci_dev_get(dev); |
502 | if (!hdev) | |
1da177e4 LT |
503 | return -ENODEV; |
504 | ||
505 | BT_DBG("%s %p", hdev->name, hdev); | |
506 | ||
507 | hci_req_lock(hdev); | |
508 | ||
611b30f7 MH |
509 | if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) { |
510 | ret = -ERFKILL; | |
511 | goto done; | |
512 | } | |
513 | ||
1da177e4 LT |
514 | if (test_bit(HCI_UP, &hdev->flags)) { |
515 | ret = -EALREADY; | |
516 | goto done; | |
517 | } | |
518 | ||
519 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
520 | set_bit(HCI_RAW, &hdev->flags); | |
521 | ||
943da25d MH |
522 | /* Treat all non BR/EDR controllers as raw devices for now */ |
523 | if (hdev->dev_type != HCI_BREDR) | |
524 | set_bit(HCI_RAW, &hdev->flags); | |
525 | ||
1da177e4 LT |
526 | if (hdev->open(hdev)) { |
527 | ret = -EIO; | |
528 | goto done; | |
529 | } | |
530 | ||
531 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
532 | atomic_set(&hdev->cmd_cnt, 1); | |
533 | set_bit(HCI_INIT, &hdev->flags); | |
a5040efa | 534 | hdev->init_last_cmd = 0; |
1da177e4 | 535 | |
04837f64 MH |
536 | ret = __hci_request(hdev, hci_init_req, 0, |
537 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 | 538 | |
6ed58ec5 VT |
539 | if (lmp_le_capable(hdev)) |
540 | ret = __hci_request(hdev, hci_le_init_req, 0, | |
541 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
542 | ||
1da177e4 LT |
543 | clear_bit(HCI_INIT, &hdev->flags); |
544 | } | |
545 | ||
546 | if (!ret) { | |
547 | hci_dev_hold(hdev); | |
548 | set_bit(HCI_UP, &hdev->flags); | |
549 | hci_notify(hdev, HCI_DEV_UP); | |
5add6af8 JH |
550 | if (!test_bit(HCI_SETUP, &hdev->flags)) |
551 | mgmt_powered(hdev->id, 1); | |
8e87d142 | 552 | } else { |
1da177e4 LT |
553 | /* Init failed, cleanup */ |
554 | tasklet_kill(&hdev->rx_task); | |
555 | tasklet_kill(&hdev->tx_task); | |
556 | tasklet_kill(&hdev->cmd_task); | |
557 | ||
558 | skb_queue_purge(&hdev->cmd_q); | |
559 | skb_queue_purge(&hdev->rx_q); | |
560 | ||
561 | if (hdev->flush) | |
562 | hdev->flush(hdev); | |
563 | ||
564 | if (hdev->sent_cmd) { | |
565 | kfree_skb(hdev->sent_cmd); | |
566 | hdev->sent_cmd = NULL; | |
567 | } | |
568 | ||
569 | hdev->close(hdev); | |
570 | hdev->flags = 0; | |
571 | } | |
572 | ||
573 | done: | |
574 | hci_req_unlock(hdev); | |
575 | hci_dev_put(hdev); | |
576 | return ret; | |
577 | } | |
578 | ||
579 | static int hci_dev_do_close(struct hci_dev *hdev) | |
580 | { | |
581 | BT_DBG("%s %p", hdev->name, hdev); | |
582 | ||
583 | hci_req_cancel(hdev, ENODEV); | |
584 | hci_req_lock(hdev); | |
585 | ||
586 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
587 | hci_req_unlock(hdev); | |
588 | return 0; | |
589 | } | |
590 | ||
591 | /* Kill RX and TX tasks */ | |
592 | tasklet_kill(&hdev->rx_task); | |
593 | tasklet_kill(&hdev->tx_task); | |
594 | ||
595 | hci_dev_lock_bh(hdev); | |
596 | inquiry_cache_flush(hdev); | |
597 | hci_conn_hash_flush(hdev); | |
598 | hci_dev_unlock_bh(hdev); | |
599 | ||
600 | hci_notify(hdev, HCI_DEV_DOWN); | |
601 | ||
602 | if (hdev->flush) | |
603 | hdev->flush(hdev); | |
604 | ||
605 | /* Reset device */ | |
606 | skb_queue_purge(&hdev->cmd_q); | |
607 | atomic_set(&hdev->cmd_cnt, 1); | |
608 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
609 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 MH |
610 | __hci_request(hdev, hci_reset_req, 0, |
611 | msecs_to_jiffies(250)); | |
1da177e4 LT |
612 | clear_bit(HCI_INIT, &hdev->flags); |
613 | } | |
614 | ||
615 | /* Kill cmd task */ | |
616 | tasklet_kill(&hdev->cmd_task); | |
617 | ||
618 | /* Drop queues */ | |
619 | skb_queue_purge(&hdev->rx_q); | |
620 | skb_queue_purge(&hdev->cmd_q); | |
621 | skb_queue_purge(&hdev->raw_q); | |
622 | ||
623 | /* Drop last sent command */ | |
624 | if (hdev->sent_cmd) { | |
6bd32326 | 625 | del_timer_sync(&hdev->cmd_timer); |
1da177e4 LT |
626 | kfree_skb(hdev->sent_cmd); |
627 | hdev->sent_cmd = NULL; | |
628 | } | |
629 | ||
630 | /* After this point our queues are empty | |
631 | * and no tasks are scheduled. */ | |
632 | hdev->close(hdev); | |
633 | ||
5add6af8 JH |
634 | mgmt_powered(hdev->id, 0); |
635 | ||
1da177e4 LT |
636 | /* Clear flags */ |
637 | hdev->flags = 0; | |
638 | ||
639 | hci_req_unlock(hdev); | |
640 | ||
641 | hci_dev_put(hdev); | |
642 | return 0; | |
643 | } | |
644 | ||
645 | int hci_dev_close(__u16 dev) | |
646 | { | |
647 | struct hci_dev *hdev; | |
648 | int err; | |
649 | ||
70f23020 AE |
650 | hdev = hci_dev_get(dev); |
651 | if (!hdev) | |
1da177e4 LT |
652 | return -ENODEV; |
653 | err = hci_dev_do_close(hdev); | |
654 | hci_dev_put(hdev); | |
655 | return err; | |
656 | } | |
657 | ||
658 | int hci_dev_reset(__u16 dev) | |
659 | { | |
660 | struct hci_dev *hdev; | |
661 | int ret = 0; | |
662 | ||
70f23020 AE |
663 | hdev = hci_dev_get(dev); |
664 | if (!hdev) | |
1da177e4 LT |
665 | return -ENODEV; |
666 | ||
667 | hci_req_lock(hdev); | |
668 | tasklet_disable(&hdev->tx_task); | |
669 | ||
670 | if (!test_bit(HCI_UP, &hdev->flags)) | |
671 | goto done; | |
672 | ||
673 | /* Drop queues */ | |
674 | skb_queue_purge(&hdev->rx_q); | |
675 | skb_queue_purge(&hdev->cmd_q); | |
676 | ||
677 | hci_dev_lock_bh(hdev); | |
678 | inquiry_cache_flush(hdev); | |
679 | hci_conn_hash_flush(hdev); | |
680 | hci_dev_unlock_bh(hdev); | |
681 | ||
682 | if (hdev->flush) | |
683 | hdev->flush(hdev); | |
684 | ||
8e87d142 | 685 | atomic_set(&hdev->cmd_cnt, 1); |
6ed58ec5 | 686 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0; |
1da177e4 LT |
687 | |
688 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
689 | ret = __hci_request(hdev, hci_reset_req, 0, |
690 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
691 | |
692 | done: | |
693 | tasklet_enable(&hdev->tx_task); | |
694 | hci_req_unlock(hdev); | |
695 | hci_dev_put(hdev); | |
696 | return ret; | |
697 | } | |
698 | ||
699 | int hci_dev_reset_stat(__u16 dev) | |
700 | { | |
701 | struct hci_dev *hdev; | |
702 | int ret = 0; | |
703 | ||
70f23020 AE |
704 | hdev = hci_dev_get(dev); |
705 | if (!hdev) | |
1da177e4 LT |
706 | return -ENODEV; |
707 | ||
708 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
709 | ||
710 | hci_dev_put(hdev); | |
711 | ||
712 | return ret; | |
713 | } | |
714 | ||
715 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
716 | { | |
717 | struct hci_dev *hdev; | |
718 | struct hci_dev_req dr; | |
719 | int err = 0; | |
720 | ||
721 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
722 | return -EFAULT; | |
723 | ||
70f23020 AE |
724 | hdev = hci_dev_get(dr.dev_id); |
725 | if (!hdev) | |
1da177e4 LT |
726 | return -ENODEV; |
727 | ||
728 | switch (cmd) { | |
729 | case HCISETAUTH: | |
04837f64 MH |
730 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
731 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
732 | break; |
733 | ||
734 | case HCISETENCRYPT: | |
735 | if (!lmp_encrypt_capable(hdev)) { | |
736 | err = -EOPNOTSUPP; | |
737 | break; | |
738 | } | |
739 | ||
740 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
741 | /* Auth must be enabled first */ | |
04837f64 MH |
742 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
743 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
744 | if (err) |
745 | break; | |
746 | } | |
747 | ||
04837f64 MH |
748 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
749 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
750 | break; |
751 | ||
752 | case HCISETSCAN: | |
04837f64 MH |
753 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
754 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
755 | break; |
756 | ||
1da177e4 | 757 | case HCISETLINKPOL: |
e4e8e37c MH |
758 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
759 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
760 | break; |
761 | ||
762 | case HCISETLINKMODE: | |
e4e8e37c MH |
763 | hdev->link_mode = ((__u16) dr.dev_opt) & |
764 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
765 | break; | |
766 | ||
767 | case HCISETPTYPE: | |
768 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
769 | break; |
770 | ||
771 | case HCISETACLMTU: | |
e4e8e37c MH |
772 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
773 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
774 | break; |
775 | ||
776 | case HCISETSCOMTU: | |
e4e8e37c MH |
777 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
778 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
779 | break; |
780 | ||
781 | default: | |
782 | err = -EINVAL; | |
783 | break; | |
784 | } | |
e4e8e37c | 785 | |
1da177e4 LT |
786 | hci_dev_put(hdev); |
787 | return err; | |
788 | } | |
789 | ||
790 | int hci_get_dev_list(void __user *arg) | |
791 | { | |
792 | struct hci_dev_list_req *dl; | |
793 | struct hci_dev_req *dr; | |
794 | struct list_head *p; | |
795 | int n = 0, size, err; | |
796 | __u16 dev_num; | |
797 | ||
798 | if (get_user(dev_num, (__u16 __user *) arg)) | |
799 | return -EFAULT; | |
800 | ||
801 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
802 | return -EINVAL; | |
803 | ||
804 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
805 | ||
70f23020 AE |
806 | dl = kzalloc(size, GFP_KERNEL); |
807 | if (!dl) | |
1da177e4 LT |
808 | return -ENOMEM; |
809 | ||
810 | dr = dl->dev_req; | |
811 | ||
812 | read_lock_bh(&hci_dev_list_lock); | |
813 | list_for_each(p, &hci_dev_list) { | |
814 | struct hci_dev *hdev; | |
c542a06c | 815 | |
1da177e4 | 816 | hdev = list_entry(p, struct hci_dev, list); |
c542a06c | 817 | |
ab81cbf9 | 818 | hci_del_off_timer(hdev); |
c542a06c JH |
819 | |
820 | if (!test_bit(HCI_MGMT, &hdev->flags)) | |
821 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
822 | ||
1da177e4 LT |
823 | (dr + n)->dev_id = hdev->id; |
824 | (dr + n)->dev_opt = hdev->flags; | |
c542a06c | 825 | |
1da177e4 LT |
826 | if (++n >= dev_num) |
827 | break; | |
828 | } | |
829 | read_unlock_bh(&hci_dev_list_lock); | |
830 | ||
831 | dl->dev_num = n; | |
832 | size = sizeof(*dl) + n * sizeof(*dr); | |
833 | ||
834 | err = copy_to_user(arg, dl, size); | |
835 | kfree(dl); | |
836 | ||
837 | return err ? -EFAULT : 0; | |
838 | } | |
839 | ||
840 | int hci_get_dev_info(void __user *arg) | |
841 | { | |
842 | struct hci_dev *hdev; | |
843 | struct hci_dev_info di; | |
844 | int err = 0; | |
845 | ||
846 | if (copy_from_user(&di, arg, sizeof(di))) | |
847 | return -EFAULT; | |
848 | ||
70f23020 AE |
849 | hdev = hci_dev_get(di.dev_id); |
850 | if (!hdev) | |
1da177e4 LT |
851 | return -ENODEV; |
852 | ||
ab81cbf9 JH |
853 | hci_del_off_timer(hdev); |
854 | ||
c542a06c JH |
855 | if (!test_bit(HCI_MGMT, &hdev->flags)) |
856 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
857 | ||
1da177e4 LT |
858 | strcpy(di.name, hdev->name); |
859 | di.bdaddr = hdev->bdaddr; | |
943da25d | 860 | di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4); |
1da177e4 LT |
861 | di.flags = hdev->flags; |
862 | di.pkt_type = hdev->pkt_type; | |
863 | di.acl_mtu = hdev->acl_mtu; | |
864 | di.acl_pkts = hdev->acl_pkts; | |
865 | di.sco_mtu = hdev->sco_mtu; | |
866 | di.sco_pkts = hdev->sco_pkts; | |
867 | di.link_policy = hdev->link_policy; | |
868 | di.link_mode = hdev->link_mode; | |
869 | ||
870 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
871 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
872 | ||
873 | if (copy_to_user(arg, &di, sizeof(di))) | |
874 | err = -EFAULT; | |
875 | ||
876 | hci_dev_put(hdev); | |
877 | ||
878 | return err; | |
879 | } | |
880 | ||
881 | /* ---- Interface to HCI drivers ---- */ | |
882 | ||
611b30f7 MH |
883 | static int hci_rfkill_set_block(void *data, bool blocked) |
884 | { | |
885 | struct hci_dev *hdev = data; | |
886 | ||
887 | BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); | |
888 | ||
889 | if (!blocked) | |
890 | return 0; | |
891 | ||
892 | hci_dev_do_close(hdev); | |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
897 | static const struct rfkill_ops hci_rfkill_ops = { | |
898 | .set_block = hci_rfkill_set_block, | |
899 | }; | |
900 | ||
1da177e4 LT |
901 | /* Alloc HCI device */ |
902 | struct hci_dev *hci_alloc_dev(void) | |
903 | { | |
904 | struct hci_dev *hdev; | |
905 | ||
25ea6db0 | 906 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
907 | if (!hdev) |
908 | return NULL; | |
909 | ||
1da177e4 LT |
910 | skb_queue_head_init(&hdev->driver_init); |
911 | ||
912 | return hdev; | |
913 | } | |
914 | EXPORT_SYMBOL(hci_alloc_dev); | |
915 | ||
916 | /* Free HCI device */ | |
917 | void hci_free_dev(struct hci_dev *hdev) | |
918 | { | |
919 | skb_queue_purge(&hdev->driver_init); | |
920 | ||
a91f2e39 MH |
921 | /* will free via device release */ |
922 | put_device(&hdev->dev); | |
1da177e4 LT |
923 | } |
924 | EXPORT_SYMBOL(hci_free_dev); | |
925 | ||
ab81cbf9 JH |
926 | static void hci_power_on(struct work_struct *work) |
927 | { | |
928 | struct hci_dev *hdev = container_of(work, struct hci_dev, power_on); | |
929 | ||
930 | BT_DBG("%s", hdev->name); | |
931 | ||
932 | if (hci_dev_open(hdev->id) < 0) | |
933 | return; | |
934 | ||
935 | if (test_bit(HCI_AUTO_OFF, &hdev->flags)) | |
936 | mod_timer(&hdev->off_timer, | |
937 | jiffies + msecs_to_jiffies(AUTO_OFF_TIMEOUT)); | |
938 | ||
939 | if (test_and_clear_bit(HCI_SETUP, &hdev->flags)) | |
940 | mgmt_index_added(hdev->id); | |
941 | } | |
942 | ||
943 | static void hci_power_off(struct work_struct *work) | |
944 | { | |
945 | struct hci_dev *hdev = container_of(work, struct hci_dev, power_off); | |
946 | ||
947 | BT_DBG("%s", hdev->name); | |
948 | ||
949 | hci_dev_close(hdev->id); | |
950 | } | |
951 | ||
952 | static void hci_auto_off(unsigned long data) | |
953 | { | |
954 | struct hci_dev *hdev = (struct hci_dev *) data; | |
955 | ||
956 | BT_DBG("%s", hdev->name); | |
957 | ||
958 | clear_bit(HCI_AUTO_OFF, &hdev->flags); | |
959 | ||
960 | queue_work(hdev->workqueue, &hdev->power_off); | |
961 | } | |
962 | ||
963 | void hci_del_off_timer(struct hci_dev *hdev) | |
964 | { | |
965 | BT_DBG("%s", hdev->name); | |
966 | ||
967 | clear_bit(HCI_AUTO_OFF, &hdev->flags); | |
968 | del_timer(&hdev->off_timer); | |
969 | } | |
970 | ||
2aeb9a1a JH |
971 | int hci_uuids_clear(struct hci_dev *hdev) |
972 | { | |
973 | struct list_head *p, *n; | |
974 | ||
975 | list_for_each_safe(p, n, &hdev->uuids) { | |
976 | struct bt_uuid *uuid; | |
977 | ||
978 | uuid = list_entry(p, struct bt_uuid, list); | |
979 | ||
980 | list_del(p); | |
981 | kfree(uuid); | |
982 | } | |
983 | ||
984 | return 0; | |
985 | } | |
986 | ||
55ed8ca1 JH |
987 | int hci_link_keys_clear(struct hci_dev *hdev) |
988 | { | |
989 | struct list_head *p, *n; | |
990 | ||
991 | list_for_each_safe(p, n, &hdev->link_keys) { | |
992 | struct link_key *key; | |
993 | ||
994 | key = list_entry(p, struct link_key, list); | |
995 | ||
996 | list_del(p); | |
997 | kfree(key); | |
998 | } | |
999 | ||
1000 | return 0; | |
1001 | } | |
1002 | ||
1003 | struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1004 | { | |
1005 | struct list_head *p; | |
1006 | ||
1007 | list_for_each(p, &hdev->link_keys) { | |
1008 | struct link_key *k; | |
1009 | ||
1010 | k = list_entry(p, struct link_key, list); | |
1011 | ||
1012 | if (bacmp(bdaddr, &k->bdaddr) == 0) | |
1013 | return k; | |
1014 | } | |
1015 | ||
1016 | return NULL; | |
1017 | } | |
1018 | ||
1019 | int hci_add_link_key(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr, | |
1020 | u8 *val, u8 type, u8 pin_len) | |
1021 | { | |
1022 | struct link_key *key, *old_key; | |
1023 | u8 old_key_type; | |
1024 | ||
1025 | old_key = hci_find_link_key(hdev, bdaddr); | |
1026 | if (old_key) { | |
1027 | old_key_type = old_key->type; | |
1028 | key = old_key; | |
1029 | } else { | |
1030 | old_key_type = 0xff; | |
1031 | key = kzalloc(sizeof(*key), GFP_ATOMIC); | |
1032 | if (!key) | |
1033 | return -ENOMEM; | |
1034 | list_add(&key->list, &hdev->link_keys); | |
1035 | } | |
1036 | ||
1037 | BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type); | |
1038 | ||
1039 | bacpy(&key->bdaddr, bdaddr); | |
1040 | memcpy(key->val, val, 16); | |
1041 | key->type = type; | |
1042 | key->pin_len = pin_len; | |
1043 | ||
1044 | if (new_key) | |
1045 | mgmt_new_key(hdev->id, key, old_key_type); | |
1046 | ||
1047 | if (type == 0x06) | |
1048 | key->type = old_key_type; | |
1049 | ||
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1054 | { | |
1055 | struct link_key *key; | |
1056 | ||
1057 | key = hci_find_link_key(hdev, bdaddr); | |
1058 | if (!key) | |
1059 | return -ENOENT; | |
1060 | ||
1061 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1062 | ||
1063 | list_del(&key->list); | |
1064 | kfree(key); | |
1065 | ||
1066 | return 0; | |
1067 | } | |
1068 | ||
6bd32326 VT |
1069 | /* HCI command timer function */ |
1070 | static void hci_cmd_timer(unsigned long arg) | |
1071 | { | |
1072 | struct hci_dev *hdev = (void *) arg; | |
1073 | ||
1074 | BT_ERR("%s command tx timeout", hdev->name); | |
1075 | atomic_set(&hdev->cmd_cnt, 1); | |
1076 | tasklet_schedule(&hdev->cmd_task); | |
1077 | } | |
1078 | ||
1da177e4 LT |
1079 | /* Register HCI device */ |
1080 | int hci_register_dev(struct hci_dev *hdev) | |
1081 | { | |
1082 | struct list_head *head = &hci_dev_list, *p; | |
ef222013 | 1083 | int i, id = 0; |
1da177e4 | 1084 | |
c13854ce MH |
1085 | BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name, |
1086 | hdev->bus, hdev->owner); | |
1da177e4 LT |
1087 | |
1088 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
1089 | return -EINVAL; | |
1090 | ||
1091 | write_lock_bh(&hci_dev_list_lock); | |
1092 | ||
1093 | /* Find first available device id */ | |
1094 | list_for_each(p, &hci_dev_list) { | |
1095 | if (list_entry(p, struct hci_dev, list)->id != id) | |
1096 | break; | |
1097 | head = p; id++; | |
1098 | } | |
8e87d142 | 1099 | |
1da177e4 LT |
1100 | sprintf(hdev->name, "hci%d", id); |
1101 | hdev->id = id; | |
1102 | list_add(&hdev->list, head); | |
1103 | ||
1104 | atomic_set(&hdev->refcnt, 1); | |
1105 | spin_lock_init(&hdev->lock); | |
1106 | ||
1107 | hdev->flags = 0; | |
1108 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 1109 | hdev->esco_type = (ESCO_HV1); |
1da177e4 | 1110 | hdev->link_mode = (HCI_LM_ACCEPT); |
17fa4b9d | 1111 | hdev->io_capability = 0x03; /* No Input No Output */ |
1da177e4 | 1112 | |
04837f64 MH |
1113 | hdev->idle_timeout = 0; |
1114 | hdev->sniff_max_interval = 800; | |
1115 | hdev->sniff_min_interval = 80; | |
1116 | ||
70f23020 | 1117 | tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev); |
1da177e4 LT |
1118 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); |
1119 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
1120 | ||
1121 | skb_queue_head_init(&hdev->rx_q); | |
1122 | skb_queue_head_init(&hdev->cmd_q); | |
1123 | skb_queue_head_init(&hdev->raw_q); | |
1124 | ||
6bd32326 VT |
1125 | setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev); |
1126 | ||
cd4c5391 | 1127 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1128 | hdev->reassembly[i] = NULL; |
1129 | ||
1da177e4 | 1130 | init_waitqueue_head(&hdev->req_wait_q); |
a6a67efd | 1131 | mutex_init(&hdev->req_lock); |
1da177e4 LT |
1132 | |
1133 | inquiry_cache_init(hdev); | |
1134 | ||
1135 | hci_conn_hash_init(hdev); | |
1136 | ||
ea4bd8ba | 1137 | INIT_LIST_HEAD(&hdev->blacklist); |
f0358568 | 1138 | |
2aeb9a1a JH |
1139 | INIT_LIST_HEAD(&hdev->uuids); |
1140 | ||
55ed8ca1 JH |
1141 | INIT_LIST_HEAD(&hdev->link_keys); |
1142 | ||
ab81cbf9 JH |
1143 | INIT_WORK(&hdev->power_on, hci_power_on); |
1144 | INIT_WORK(&hdev->power_off, hci_power_off); | |
1145 | setup_timer(&hdev->off_timer, hci_auto_off, (unsigned long) hdev); | |
1146 | ||
1da177e4 LT |
1147 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
1148 | ||
1149 | atomic_set(&hdev->promisc, 0); | |
1150 | ||
1151 | write_unlock_bh(&hci_dev_list_lock); | |
1152 | ||
f48fd9c8 MH |
1153 | hdev->workqueue = create_singlethread_workqueue(hdev->name); |
1154 | if (!hdev->workqueue) | |
1155 | goto nomem; | |
1156 | ||
1da177e4 LT |
1157 | hci_register_sysfs(hdev); |
1158 | ||
611b30f7 MH |
1159 | hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
1160 | RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev); | |
1161 | if (hdev->rfkill) { | |
1162 | if (rfkill_register(hdev->rfkill) < 0) { | |
1163 | rfkill_destroy(hdev->rfkill); | |
1164 | hdev->rfkill = NULL; | |
1165 | } | |
1166 | } | |
1167 | ||
ab81cbf9 JH |
1168 | set_bit(HCI_AUTO_OFF, &hdev->flags); |
1169 | set_bit(HCI_SETUP, &hdev->flags); | |
1170 | queue_work(hdev->workqueue, &hdev->power_on); | |
1171 | ||
1da177e4 LT |
1172 | hci_notify(hdev, HCI_DEV_REG); |
1173 | ||
1174 | return id; | |
f48fd9c8 MH |
1175 | |
1176 | nomem: | |
1177 | write_lock_bh(&hci_dev_list_lock); | |
1178 | list_del(&hdev->list); | |
1179 | write_unlock_bh(&hci_dev_list_lock); | |
1180 | ||
1181 | return -ENOMEM; | |
1da177e4 LT |
1182 | } |
1183 | EXPORT_SYMBOL(hci_register_dev); | |
1184 | ||
1185 | /* Unregister HCI device */ | |
1186 | int hci_unregister_dev(struct hci_dev *hdev) | |
1187 | { | |
ef222013 MH |
1188 | int i; |
1189 | ||
c13854ce | 1190 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
1da177e4 | 1191 | |
1da177e4 LT |
1192 | write_lock_bh(&hci_dev_list_lock); |
1193 | list_del(&hdev->list); | |
1194 | write_unlock_bh(&hci_dev_list_lock); | |
1195 | ||
1196 | hci_dev_do_close(hdev); | |
1197 | ||
cd4c5391 | 1198 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1199 | kfree_skb(hdev->reassembly[i]); |
1200 | ||
ab81cbf9 JH |
1201 | if (!test_bit(HCI_INIT, &hdev->flags) && |
1202 | !test_bit(HCI_SETUP, &hdev->flags)) | |
1203 | mgmt_index_removed(hdev->id); | |
1204 | ||
1da177e4 LT |
1205 | hci_notify(hdev, HCI_DEV_UNREG); |
1206 | ||
611b30f7 MH |
1207 | if (hdev->rfkill) { |
1208 | rfkill_unregister(hdev->rfkill); | |
1209 | rfkill_destroy(hdev->rfkill); | |
1210 | } | |
1211 | ||
147e2d59 DY |
1212 | hci_unregister_sysfs(hdev); |
1213 | ||
c6f3c5f7 GP |
1214 | hci_del_off_timer(hdev); |
1215 | ||
f48fd9c8 MH |
1216 | destroy_workqueue(hdev->workqueue); |
1217 | ||
e2e0cacb JH |
1218 | hci_dev_lock_bh(hdev); |
1219 | hci_blacklist_clear(hdev); | |
2aeb9a1a | 1220 | hci_uuids_clear(hdev); |
55ed8ca1 | 1221 | hci_link_keys_clear(hdev); |
e2e0cacb JH |
1222 | hci_dev_unlock_bh(hdev); |
1223 | ||
1da177e4 | 1224 | __hci_dev_put(hdev); |
ef222013 | 1225 | |
1da177e4 LT |
1226 | return 0; |
1227 | } | |
1228 | EXPORT_SYMBOL(hci_unregister_dev); | |
1229 | ||
1230 | /* Suspend HCI device */ | |
1231 | int hci_suspend_dev(struct hci_dev *hdev) | |
1232 | { | |
1233 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
1234 | return 0; | |
1235 | } | |
1236 | EXPORT_SYMBOL(hci_suspend_dev); | |
1237 | ||
1238 | /* Resume HCI device */ | |
1239 | int hci_resume_dev(struct hci_dev *hdev) | |
1240 | { | |
1241 | hci_notify(hdev, HCI_DEV_RESUME); | |
1242 | return 0; | |
1243 | } | |
1244 | EXPORT_SYMBOL(hci_resume_dev); | |
1245 | ||
76bca880 MH |
1246 | /* Receive frame from HCI drivers */ |
1247 | int hci_recv_frame(struct sk_buff *skb) | |
1248 | { | |
1249 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1250 | if (!hdev || (!test_bit(HCI_UP, &hdev->flags) | |
1251 | && !test_bit(HCI_INIT, &hdev->flags))) { | |
1252 | kfree_skb(skb); | |
1253 | return -ENXIO; | |
1254 | } | |
1255 | ||
1256 | /* Incomming skb */ | |
1257 | bt_cb(skb)->incoming = 1; | |
1258 | ||
1259 | /* Time stamp */ | |
1260 | __net_timestamp(skb); | |
1261 | ||
1262 | /* Queue frame for rx task */ | |
1263 | skb_queue_tail(&hdev->rx_q, skb); | |
c78ae283 MH |
1264 | tasklet_schedule(&hdev->rx_task); |
1265 | ||
76bca880 MH |
1266 | return 0; |
1267 | } | |
1268 | EXPORT_SYMBOL(hci_recv_frame); | |
1269 | ||
33e882a5 SS |
1270 | static int hci_reassembly(struct hci_dev *hdev, int type, void *data, |
1271 | int count, __u8 index, gfp_t gfp_mask) | |
1272 | { | |
1273 | int len = 0; | |
1274 | int hlen = 0; | |
1275 | int remain = count; | |
1276 | struct sk_buff *skb; | |
1277 | struct bt_skb_cb *scb; | |
1278 | ||
1279 | if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) || | |
1280 | index >= NUM_REASSEMBLY) | |
1281 | return -EILSEQ; | |
1282 | ||
1283 | skb = hdev->reassembly[index]; | |
1284 | ||
1285 | if (!skb) { | |
1286 | switch (type) { | |
1287 | case HCI_ACLDATA_PKT: | |
1288 | len = HCI_MAX_FRAME_SIZE; | |
1289 | hlen = HCI_ACL_HDR_SIZE; | |
1290 | break; | |
1291 | case HCI_EVENT_PKT: | |
1292 | len = HCI_MAX_EVENT_SIZE; | |
1293 | hlen = HCI_EVENT_HDR_SIZE; | |
1294 | break; | |
1295 | case HCI_SCODATA_PKT: | |
1296 | len = HCI_MAX_SCO_SIZE; | |
1297 | hlen = HCI_SCO_HDR_SIZE; | |
1298 | break; | |
1299 | } | |
1300 | ||
1301 | skb = bt_skb_alloc(len, gfp_mask); | |
1302 | if (!skb) | |
1303 | return -ENOMEM; | |
1304 | ||
1305 | scb = (void *) skb->cb; | |
1306 | scb->expect = hlen; | |
1307 | scb->pkt_type = type; | |
1308 | ||
1309 | skb->dev = (void *) hdev; | |
1310 | hdev->reassembly[index] = skb; | |
1311 | } | |
1312 | ||
1313 | while (count) { | |
1314 | scb = (void *) skb->cb; | |
1315 | len = min(scb->expect, (__u16)count); | |
1316 | ||
1317 | memcpy(skb_put(skb, len), data, len); | |
1318 | ||
1319 | count -= len; | |
1320 | data += len; | |
1321 | scb->expect -= len; | |
1322 | remain = count; | |
1323 | ||
1324 | switch (type) { | |
1325 | case HCI_EVENT_PKT: | |
1326 | if (skb->len == HCI_EVENT_HDR_SIZE) { | |
1327 | struct hci_event_hdr *h = hci_event_hdr(skb); | |
1328 | scb->expect = h->plen; | |
1329 | ||
1330 | if (skb_tailroom(skb) < scb->expect) { | |
1331 | kfree_skb(skb); | |
1332 | hdev->reassembly[index] = NULL; | |
1333 | return -ENOMEM; | |
1334 | } | |
1335 | } | |
1336 | break; | |
1337 | ||
1338 | case HCI_ACLDATA_PKT: | |
1339 | if (skb->len == HCI_ACL_HDR_SIZE) { | |
1340 | struct hci_acl_hdr *h = hci_acl_hdr(skb); | |
1341 | scb->expect = __le16_to_cpu(h->dlen); | |
1342 | ||
1343 | if (skb_tailroom(skb) < scb->expect) { | |
1344 | kfree_skb(skb); | |
1345 | hdev->reassembly[index] = NULL; | |
1346 | return -ENOMEM; | |
1347 | } | |
1348 | } | |
1349 | break; | |
1350 | ||
1351 | case HCI_SCODATA_PKT: | |
1352 | if (skb->len == HCI_SCO_HDR_SIZE) { | |
1353 | struct hci_sco_hdr *h = hci_sco_hdr(skb); | |
1354 | scb->expect = h->dlen; | |
1355 | ||
1356 | if (skb_tailroom(skb) < scb->expect) { | |
1357 | kfree_skb(skb); | |
1358 | hdev->reassembly[index] = NULL; | |
1359 | return -ENOMEM; | |
1360 | } | |
1361 | } | |
1362 | break; | |
1363 | } | |
1364 | ||
1365 | if (scb->expect == 0) { | |
1366 | /* Complete frame */ | |
1367 | ||
1368 | bt_cb(skb)->pkt_type = type; | |
1369 | hci_recv_frame(skb); | |
1370 | ||
1371 | hdev->reassembly[index] = NULL; | |
1372 | return remain; | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | return remain; | |
1377 | } | |
1378 | ||
ef222013 MH |
1379 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) |
1380 | { | |
f39a3c06 SS |
1381 | int rem = 0; |
1382 | ||
ef222013 MH |
1383 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) |
1384 | return -EILSEQ; | |
1385 | ||
da5f6c37 | 1386 | while (count) { |
f39a3c06 SS |
1387 | rem = hci_reassembly(hdev, type, data, count, |
1388 | type - 1, GFP_ATOMIC); | |
1389 | if (rem < 0) | |
1390 | return rem; | |
ef222013 | 1391 | |
f39a3c06 SS |
1392 | data += (count - rem); |
1393 | count = rem; | |
da5f6c37 | 1394 | }; |
ef222013 | 1395 | |
f39a3c06 | 1396 | return rem; |
ef222013 MH |
1397 | } |
1398 | EXPORT_SYMBOL(hci_recv_fragment); | |
1399 | ||
99811510 SS |
1400 | #define STREAM_REASSEMBLY 0 |
1401 | ||
1402 | int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count) | |
1403 | { | |
1404 | int type; | |
1405 | int rem = 0; | |
1406 | ||
da5f6c37 | 1407 | while (count) { |
99811510 SS |
1408 | struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY]; |
1409 | ||
1410 | if (!skb) { | |
1411 | struct { char type; } *pkt; | |
1412 | ||
1413 | /* Start of the frame */ | |
1414 | pkt = data; | |
1415 | type = pkt->type; | |
1416 | ||
1417 | data++; | |
1418 | count--; | |
1419 | } else | |
1420 | type = bt_cb(skb)->pkt_type; | |
1421 | ||
1422 | rem = hci_reassembly(hdev, type, data, | |
1423 | count, STREAM_REASSEMBLY, GFP_ATOMIC); | |
1424 | if (rem < 0) | |
1425 | return rem; | |
1426 | ||
1427 | data += (count - rem); | |
1428 | count = rem; | |
da5f6c37 | 1429 | }; |
99811510 SS |
1430 | |
1431 | return rem; | |
1432 | } | |
1433 | EXPORT_SYMBOL(hci_recv_stream_fragment); | |
1434 | ||
1da177e4 LT |
1435 | /* ---- Interface to upper protocols ---- */ |
1436 | ||
1437 | /* Register/Unregister protocols. | |
1438 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1439 | int hci_register_proto(struct hci_proto *hp) | |
1440 | { | |
1441 | int err = 0; | |
1442 | ||
1443 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1444 | ||
1445 | if (hp->id >= HCI_MAX_PROTO) | |
1446 | return -EINVAL; | |
1447 | ||
1448 | write_lock_bh(&hci_task_lock); | |
1449 | ||
1450 | if (!hci_proto[hp->id]) | |
1451 | hci_proto[hp->id] = hp; | |
1452 | else | |
1453 | err = -EEXIST; | |
1454 | ||
1455 | write_unlock_bh(&hci_task_lock); | |
1456 | ||
1457 | return err; | |
1458 | } | |
1459 | EXPORT_SYMBOL(hci_register_proto); | |
1460 | ||
1461 | int hci_unregister_proto(struct hci_proto *hp) | |
1462 | { | |
1463 | int err = 0; | |
1464 | ||
1465 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1466 | ||
1467 | if (hp->id >= HCI_MAX_PROTO) | |
1468 | return -EINVAL; | |
1469 | ||
1470 | write_lock_bh(&hci_task_lock); | |
1471 | ||
1472 | if (hci_proto[hp->id]) | |
1473 | hci_proto[hp->id] = NULL; | |
1474 | else | |
1475 | err = -ENOENT; | |
1476 | ||
1477 | write_unlock_bh(&hci_task_lock); | |
1478 | ||
1479 | return err; | |
1480 | } | |
1481 | EXPORT_SYMBOL(hci_unregister_proto); | |
1482 | ||
1483 | int hci_register_cb(struct hci_cb *cb) | |
1484 | { | |
1485 | BT_DBG("%p name %s", cb, cb->name); | |
1486 | ||
1487 | write_lock_bh(&hci_cb_list_lock); | |
1488 | list_add(&cb->list, &hci_cb_list); | |
1489 | write_unlock_bh(&hci_cb_list_lock); | |
1490 | ||
1491 | return 0; | |
1492 | } | |
1493 | EXPORT_SYMBOL(hci_register_cb); | |
1494 | ||
1495 | int hci_unregister_cb(struct hci_cb *cb) | |
1496 | { | |
1497 | BT_DBG("%p name %s", cb, cb->name); | |
1498 | ||
1499 | write_lock_bh(&hci_cb_list_lock); | |
1500 | list_del(&cb->list); | |
1501 | write_unlock_bh(&hci_cb_list_lock); | |
1502 | ||
1503 | return 0; | |
1504 | } | |
1505 | EXPORT_SYMBOL(hci_unregister_cb); | |
1506 | ||
1507 | static int hci_send_frame(struct sk_buff *skb) | |
1508 | { | |
1509 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1510 | ||
1511 | if (!hdev) { | |
1512 | kfree_skb(skb); | |
1513 | return -ENODEV; | |
1514 | } | |
1515 | ||
0d48d939 | 1516 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1517 | |
1518 | if (atomic_read(&hdev->promisc)) { | |
1519 | /* Time stamp */ | |
a61bbcf2 | 1520 | __net_timestamp(skb); |
1da177e4 | 1521 | |
eec8d2bc | 1522 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
1523 | } |
1524 | ||
1525 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1526 | skb_orphan(skb); | |
1527 | ||
1528 | return hdev->send(skb); | |
1529 | } | |
1530 | ||
1531 | /* Send HCI command */ | |
a9de9248 | 1532 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1533 | { |
1534 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1535 | struct hci_command_hdr *hdr; | |
1536 | struct sk_buff *skb; | |
1537 | ||
a9de9248 | 1538 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1539 | |
1540 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1541 | if (!skb) { | |
ef222013 | 1542 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1543 | return -ENOMEM; |
1544 | } | |
1545 | ||
1546 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1547 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1548 | hdr->plen = plen; |
1549 | ||
1550 | if (plen) | |
1551 | memcpy(skb_put(skb, plen), param, plen); | |
1552 | ||
1553 | BT_DBG("skb len %d", skb->len); | |
1554 | ||
0d48d939 | 1555 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 1556 | skb->dev = (void *) hdev; |
c78ae283 | 1557 | |
a5040efa JH |
1558 | if (test_bit(HCI_INIT, &hdev->flags)) |
1559 | hdev->init_last_cmd = opcode; | |
1560 | ||
1da177e4 | 1561 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 1562 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
1563 | |
1564 | return 0; | |
1565 | } | |
1da177e4 LT |
1566 | |
1567 | /* Get data from the previously sent command */ | |
a9de9248 | 1568 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1569 | { |
1570 | struct hci_command_hdr *hdr; | |
1571 | ||
1572 | if (!hdev->sent_cmd) | |
1573 | return NULL; | |
1574 | ||
1575 | hdr = (void *) hdev->sent_cmd->data; | |
1576 | ||
a9de9248 | 1577 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1578 | return NULL; |
1579 | ||
a9de9248 | 1580 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1581 | |
1582 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1583 | } | |
1584 | ||
1585 | /* Send ACL data */ | |
1586 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1587 | { | |
1588 | struct hci_acl_hdr *hdr; | |
1589 | int len = skb->len; | |
1590 | ||
badff6d0 ACM |
1591 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1592 | skb_reset_transport_header(skb); | |
9c70220b | 1593 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1594 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1595 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1596 | } |
1597 | ||
9a9c6a34 | 1598 | void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) |
1da177e4 LT |
1599 | { |
1600 | struct hci_dev *hdev = conn->hdev; | |
1601 | struct sk_buff *list; | |
1602 | ||
1603 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); | |
1604 | ||
1605 | skb->dev = (void *) hdev; | |
0d48d939 | 1606 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 1607 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 | 1608 | |
70f23020 AE |
1609 | list = skb_shinfo(skb)->frag_list; |
1610 | if (!list) { | |
1da177e4 LT |
1611 | /* Non fragmented */ |
1612 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1613 | ||
1614 | skb_queue_tail(&conn->data_q, skb); | |
1615 | } else { | |
1616 | /* Fragmented */ | |
1617 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1618 | ||
1619 | skb_shinfo(skb)->frag_list = NULL; | |
1620 | ||
1621 | /* Queue all fragments atomically */ | |
1622 | spin_lock_bh(&conn->data_q.lock); | |
1623 | ||
1624 | __skb_queue_tail(&conn->data_q, skb); | |
e702112f AE |
1625 | |
1626 | flags &= ~ACL_START; | |
1627 | flags |= ACL_CONT; | |
1da177e4 LT |
1628 | do { |
1629 | skb = list; list = list->next; | |
8e87d142 | 1630 | |
1da177e4 | 1631 | skb->dev = (void *) hdev; |
0d48d939 | 1632 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 1633 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 LT |
1634 | |
1635 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1636 | ||
1637 | __skb_queue_tail(&conn->data_q, skb); | |
1638 | } while (list); | |
1639 | ||
1640 | spin_unlock_bh(&conn->data_q.lock); | |
1641 | } | |
1642 | ||
c78ae283 | 1643 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
1644 | } |
1645 | EXPORT_SYMBOL(hci_send_acl); | |
1646 | ||
1647 | /* Send SCO data */ | |
0d861d8b | 1648 | void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
1649 | { |
1650 | struct hci_dev *hdev = conn->hdev; | |
1651 | struct hci_sco_hdr hdr; | |
1652 | ||
1653 | BT_DBG("%s len %d", hdev->name, skb->len); | |
1654 | ||
aca3192c | 1655 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
1656 | hdr.dlen = skb->len; |
1657 | ||
badff6d0 ACM |
1658 | skb_push(skb, HCI_SCO_HDR_SIZE); |
1659 | skb_reset_transport_header(skb); | |
9c70220b | 1660 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
1661 | |
1662 | skb->dev = (void *) hdev; | |
0d48d939 | 1663 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
c78ae283 | 1664 | |
1da177e4 | 1665 | skb_queue_tail(&conn->data_q, skb); |
c78ae283 | 1666 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
1667 | } |
1668 | EXPORT_SYMBOL(hci_send_sco); | |
1669 | ||
1670 | /* ---- HCI TX task (outgoing data) ---- */ | |
1671 | ||
1672 | /* HCI Connection scheduler */ | |
1673 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
1674 | { | |
1675 | struct hci_conn_hash *h = &hdev->conn_hash; | |
5b7f9909 | 1676 | struct hci_conn *conn = NULL; |
1da177e4 LT |
1677 | int num = 0, min = ~0; |
1678 | struct list_head *p; | |
1679 | ||
8e87d142 | 1680 | /* We don't have to lock device here. Connections are always |
1da177e4 LT |
1681 | * added and removed with TX task disabled. */ |
1682 | list_for_each(p, &h->list) { | |
1683 | struct hci_conn *c; | |
1684 | c = list_entry(p, struct hci_conn, list); | |
1685 | ||
769be974 | 1686 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 1687 | continue; |
769be974 MH |
1688 | |
1689 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
1690 | continue; | |
1691 | ||
1da177e4 LT |
1692 | num++; |
1693 | ||
1694 | if (c->sent < min) { | |
1695 | min = c->sent; | |
1696 | conn = c; | |
1697 | } | |
1698 | } | |
1699 | ||
1700 | if (conn) { | |
6ed58ec5 VT |
1701 | int cnt, q; |
1702 | ||
1703 | switch (conn->type) { | |
1704 | case ACL_LINK: | |
1705 | cnt = hdev->acl_cnt; | |
1706 | break; | |
1707 | case SCO_LINK: | |
1708 | case ESCO_LINK: | |
1709 | cnt = hdev->sco_cnt; | |
1710 | break; | |
1711 | case LE_LINK: | |
1712 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; | |
1713 | break; | |
1714 | default: | |
1715 | cnt = 0; | |
1716 | BT_ERR("Unknown link type"); | |
1717 | } | |
1718 | ||
1719 | q = cnt / num; | |
1da177e4 LT |
1720 | *quote = q ? q : 1; |
1721 | } else | |
1722 | *quote = 0; | |
1723 | ||
1724 | BT_DBG("conn %p quote %d", conn, *quote); | |
1725 | return conn; | |
1726 | } | |
1727 | ||
bae1f5d9 | 1728 | static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type) |
1da177e4 LT |
1729 | { |
1730 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1731 | struct list_head *p; | |
1732 | struct hci_conn *c; | |
1733 | ||
bae1f5d9 | 1734 | BT_ERR("%s link tx timeout", hdev->name); |
1da177e4 LT |
1735 | |
1736 | /* Kill stalled connections */ | |
1737 | list_for_each(p, &h->list) { | |
1738 | c = list_entry(p, struct hci_conn, list); | |
bae1f5d9 VT |
1739 | if (c->type == type && c->sent) { |
1740 | BT_ERR("%s killing stalled connection %s", | |
1da177e4 LT |
1741 | hdev->name, batostr(&c->dst)); |
1742 | hci_acl_disconn(c, 0x13); | |
1743 | } | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
1748 | { | |
1749 | struct hci_conn *conn; | |
1750 | struct sk_buff *skb; | |
1751 | int quote; | |
1752 | ||
1753 | BT_DBG("%s", hdev->name); | |
1754 | ||
1755 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1756 | /* ACL tx timeout must be longer than maximum | |
1757 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 1758 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
bae1f5d9 | 1759 | hci_link_tx_to(hdev, ACL_LINK); |
1da177e4 LT |
1760 | } |
1761 | ||
1762 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { | |
1763 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1764 | BT_DBG("skb %p len %d", skb, skb->len); | |
04837f64 MH |
1765 | |
1766 | hci_conn_enter_active_mode(conn); | |
1767 | ||
1da177e4 LT |
1768 | hci_send_frame(skb); |
1769 | hdev->acl_last_tx = jiffies; | |
1770 | ||
1771 | hdev->acl_cnt--; | |
1772 | conn->sent++; | |
1773 | } | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | /* Schedule SCO */ | |
1778 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
1779 | { | |
1780 | struct hci_conn *conn; | |
1781 | struct sk_buff *skb; | |
1782 | int quote; | |
1783 | ||
1784 | BT_DBG("%s", hdev->name); | |
1785 | ||
1786 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { | |
1787 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1788 | BT_DBG("skb %p len %d", skb, skb->len); | |
1789 | hci_send_frame(skb); | |
1790 | ||
1791 | conn->sent++; | |
1792 | if (conn->sent == ~0) | |
1793 | conn->sent = 0; | |
1794 | } | |
1795 | } | |
1796 | } | |
1797 | ||
b6a0dc82 MH |
1798 | static inline void hci_sched_esco(struct hci_dev *hdev) |
1799 | { | |
1800 | struct hci_conn *conn; | |
1801 | struct sk_buff *skb; | |
1802 | int quote; | |
1803 | ||
1804 | BT_DBG("%s", hdev->name); | |
1805 | ||
1806 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { | |
1807 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1808 | BT_DBG("skb %p len %d", skb, skb->len); | |
1809 | hci_send_frame(skb); | |
1810 | ||
1811 | conn->sent++; | |
1812 | if (conn->sent == ~0) | |
1813 | conn->sent = 0; | |
1814 | } | |
1815 | } | |
1816 | } | |
1817 | ||
6ed58ec5 VT |
1818 | static inline void hci_sched_le(struct hci_dev *hdev) |
1819 | { | |
1820 | struct hci_conn *conn; | |
1821 | struct sk_buff *skb; | |
1822 | int quote, cnt; | |
1823 | ||
1824 | BT_DBG("%s", hdev->name); | |
1825 | ||
1826 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
1827 | /* LE tx timeout must be longer than maximum | |
1828 | * link supervision timeout (40.9 seconds) */ | |
bae1f5d9 | 1829 | if (!hdev->le_cnt && hdev->le_pkts && |
6ed58ec5 | 1830 | time_after(jiffies, hdev->le_last_tx + HZ * 45)) |
bae1f5d9 | 1831 | hci_link_tx_to(hdev, LE_LINK); |
6ed58ec5 VT |
1832 | } |
1833 | ||
1834 | cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt; | |
1835 | while (cnt && (conn = hci_low_sent(hdev, LE_LINK, "e))) { | |
1836 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
1837 | BT_DBG("skb %p len %d", skb, skb->len); | |
1838 | ||
1839 | hci_send_frame(skb); | |
1840 | hdev->le_last_tx = jiffies; | |
1841 | ||
1842 | cnt--; | |
1843 | conn->sent++; | |
1844 | } | |
1845 | } | |
1846 | if (hdev->le_pkts) | |
1847 | hdev->le_cnt = cnt; | |
1848 | else | |
1849 | hdev->acl_cnt = cnt; | |
1850 | } | |
1851 | ||
1da177e4 LT |
1852 | static void hci_tx_task(unsigned long arg) |
1853 | { | |
1854 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1855 | struct sk_buff *skb; | |
1856 | ||
1857 | read_lock(&hci_task_lock); | |
1858 | ||
6ed58ec5 VT |
1859 | BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt, |
1860 | hdev->sco_cnt, hdev->le_cnt); | |
1da177e4 LT |
1861 | |
1862 | /* Schedule queues and send stuff to HCI driver */ | |
1863 | ||
1864 | hci_sched_acl(hdev); | |
1865 | ||
1866 | hci_sched_sco(hdev); | |
1867 | ||
b6a0dc82 MH |
1868 | hci_sched_esco(hdev); |
1869 | ||
6ed58ec5 VT |
1870 | hci_sched_le(hdev); |
1871 | ||
1da177e4 LT |
1872 | /* Send next queued raw (unknown type) packet */ |
1873 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
1874 | hci_send_frame(skb); | |
1875 | ||
1876 | read_unlock(&hci_task_lock); | |
1877 | } | |
1878 | ||
1879 | /* ----- HCI RX task (incoming data proccessing) ----- */ | |
1880 | ||
1881 | /* ACL data packet */ | |
1882 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1883 | { | |
1884 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
1885 | struct hci_conn *conn; | |
1886 | __u16 handle, flags; | |
1887 | ||
1888 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
1889 | ||
1890 | handle = __le16_to_cpu(hdr->handle); | |
1891 | flags = hci_flags(handle); | |
1892 | handle = hci_handle(handle); | |
1893 | ||
1894 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
1895 | ||
1896 | hdev->stat.acl_rx++; | |
1897 | ||
1898 | hci_dev_lock(hdev); | |
1899 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1900 | hci_dev_unlock(hdev); | |
8e87d142 | 1901 | |
1da177e4 LT |
1902 | if (conn) { |
1903 | register struct hci_proto *hp; | |
1904 | ||
04837f64 MH |
1905 | hci_conn_enter_active_mode(conn); |
1906 | ||
1da177e4 | 1907 | /* Send to upper protocol */ |
70f23020 AE |
1908 | hp = hci_proto[HCI_PROTO_L2CAP]; |
1909 | if (hp && hp->recv_acldata) { | |
1da177e4 LT |
1910 | hp->recv_acldata(conn, skb, flags); |
1911 | return; | |
1912 | } | |
1913 | } else { | |
8e87d142 | 1914 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
1915 | hdev->name, handle); |
1916 | } | |
1917 | ||
1918 | kfree_skb(skb); | |
1919 | } | |
1920 | ||
1921 | /* SCO data packet */ | |
1922 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
1923 | { | |
1924 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
1925 | struct hci_conn *conn; | |
1926 | __u16 handle; | |
1927 | ||
1928 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
1929 | ||
1930 | handle = __le16_to_cpu(hdr->handle); | |
1931 | ||
1932 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
1933 | ||
1934 | hdev->stat.sco_rx++; | |
1935 | ||
1936 | hci_dev_lock(hdev); | |
1937 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
1938 | hci_dev_unlock(hdev); | |
1939 | ||
1940 | if (conn) { | |
1941 | register struct hci_proto *hp; | |
1942 | ||
1943 | /* Send to upper protocol */ | |
70f23020 AE |
1944 | hp = hci_proto[HCI_PROTO_SCO]; |
1945 | if (hp && hp->recv_scodata) { | |
1da177e4 LT |
1946 | hp->recv_scodata(conn, skb); |
1947 | return; | |
1948 | } | |
1949 | } else { | |
8e87d142 | 1950 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
1951 | hdev->name, handle); |
1952 | } | |
1953 | ||
1954 | kfree_skb(skb); | |
1955 | } | |
1956 | ||
6516455d | 1957 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
1958 | { |
1959 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
1960 | struct sk_buff *skb; | |
1961 | ||
1962 | BT_DBG("%s", hdev->name); | |
1963 | ||
1964 | read_lock(&hci_task_lock); | |
1965 | ||
1966 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
1967 | if (atomic_read(&hdev->promisc)) { | |
1968 | /* Send copy to the sockets */ | |
eec8d2bc | 1969 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
1970 | } |
1971 | ||
1972 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
1973 | kfree_skb(skb); | |
1974 | continue; | |
1975 | } | |
1976 | ||
1977 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
1978 | /* Don't process data packets in this states. */ | |
0d48d939 | 1979 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1980 | case HCI_ACLDATA_PKT: |
1981 | case HCI_SCODATA_PKT: | |
1982 | kfree_skb(skb); | |
1983 | continue; | |
3ff50b79 | 1984 | } |
1da177e4 LT |
1985 | } |
1986 | ||
1987 | /* Process frame */ | |
0d48d939 | 1988 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
1989 | case HCI_EVENT_PKT: |
1990 | hci_event_packet(hdev, skb); | |
1991 | break; | |
1992 | ||
1993 | case HCI_ACLDATA_PKT: | |
1994 | BT_DBG("%s ACL data packet", hdev->name); | |
1995 | hci_acldata_packet(hdev, skb); | |
1996 | break; | |
1997 | ||
1998 | case HCI_SCODATA_PKT: | |
1999 | BT_DBG("%s SCO data packet", hdev->name); | |
2000 | hci_scodata_packet(hdev, skb); | |
2001 | break; | |
2002 | ||
2003 | default: | |
2004 | kfree_skb(skb); | |
2005 | break; | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | read_unlock(&hci_task_lock); | |
2010 | } | |
2011 | ||
2012 | static void hci_cmd_task(unsigned long arg) | |
2013 | { | |
2014 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2015 | struct sk_buff *skb; | |
2016 | ||
2017 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
2018 | ||
1da177e4 | 2019 | /* Send queued commands */ |
5a08ecce AE |
2020 | if (atomic_read(&hdev->cmd_cnt)) { |
2021 | skb = skb_dequeue(&hdev->cmd_q); | |
2022 | if (!skb) | |
2023 | return; | |
2024 | ||
7585b97a | 2025 | kfree_skb(hdev->sent_cmd); |
1da177e4 | 2026 | |
70f23020 AE |
2027 | hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC); |
2028 | if (hdev->sent_cmd) { | |
1da177e4 LT |
2029 | atomic_dec(&hdev->cmd_cnt); |
2030 | hci_send_frame(skb); | |
6bd32326 VT |
2031 | mod_timer(&hdev->cmd_timer, |
2032 | jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT)); | |
1da177e4 LT |
2033 | } else { |
2034 | skb_queue_head(&hdev->cmd_q, skb); | |
c78ae283 | 2035 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
2036 | } |
2037 | } | |
2038 | } |