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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> |
3a0259bb | 45 | #include <linux/crypto.h> |
1da177e4 LT |
46 | #include <net/sock.h> |
47 | ||
48 | #include <asm/system.h> | |
70f23020 | 49 | #include <linux/uaccess.h> |
1da177e4 LT |
50 | #include <asm/unaligned.h> |
51 | ||
52 | #include <net/bluetooth/bluetooth.h> | |
53 | #include <net/bluetooth/hci_core.h> | |
54 | ||
ab81cbf9 JH |
55 | #define AUTO_OFF_TIMEOUT 2000 |
56 | ||
1da177e4 LT |
57 | static void hci_cmd_task(unsigned long arg); |
58 | static void hci_rx_task(unsigned long arg); | |
59 | static void hci_tx_task(unsigned long arg); | |
1da177e4 LT |
60 | |
61 | static DEFINE_RWLOCK(hci_task_lock); | |
62 | ||
63 | /* HCI device list */ | |
64 | LIST_HEAD(hci_dev_list); | |
65 | DEFINE_RWLOCK(hci_dev_list_lock); | |
66 | ||
67 | /* HCI callback list */ | |
68 | LIST_HEAD(hci_cb_list); | |
69 | DEFINE_RWLOCK(hci_cb_list_lock); | |
70 | ||
71 | /* HCI protocols */ | |
72 | #define HCI_MAX_PROTO 2 | |
73 | struct hci_proto *hci_proto[HCI_MAX_PROTO]; | |
74 | ||
75 | /* HCI notifiers list */ | |
e041c683 | 76 | static ATOMIC_NOTIFIER_HEAD(hci_notifier); |
1da177e4 LT |
77 | |
78 | /* ---- HCI notifications ---- */ | |
79 | ||
80 | int hci_register_notifier(struct notifier_block *nb) | |
81 | { | |
e041c683 | 82 | return atomic_notifier_chain_register(&hci_notifier, nb); |
1da177e4 LT |
83 | } |
84 | ||
85 | int hci_unregister_notifier(struct notifier_block *nb) | |
86 | { | |
e041c683 | 87 | return atomic_notifier_chain_unregister(&hci_notifier, nb); |
1da177e4 LT |
88 | } |
89 | ||
6516455d | 90 | static void hci_notify(struct hci_dev *hdev, int event) |
1da177e4 | 91 | { |
e041c683 | 92 | atomic_notifier_call_chain(&hci_notifier, event, hdev); |
1da177e4 LT |
93 | } |
94 | ||
95 | /* ---- HCI requests ---- */ | |
96 | ||
23bb5763 | 97 | void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result) |
1da177e4 | 98 | { |
23bb5763 JH |
99 | BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result); |
100 | ||
a5040efa JH |
101 | /* If this is the init phase check if the completed command matches |
102 | * the last init command, and if not just return. | |
103 | */ | |
104 | if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) | |
23bb5763 | 105 | return; |
1da177e4 LT |
106 | |
107 | if (hdev->req_status == HCI_REQ_PEND) { | |
108 | hdev->req_result = result; | |
109 | hdev->req_status = HCI_REQ_DONE; | |
110 | wake_up_interruptible(&hdev->req_wait_q); | |
111 | } | |
112 | } | |
113 | ||
114 | static void hci_req_cancel(struct hci_dev *hdev, int err) | |
115 | { | |
116 | BT_DBG("%s err 0x%2.2x", hdev->name, err); | |
117 | ||
118 | if (hdev->req_status == HCI_REQ_PEND) { | |
119 | hdev->req_result = err; | |
120 | hdev->req_status = HCI_REQ_CANCELED; | |
121 | wake_up_interruptible(&hdev->req_wait_q); | |
122 | } | |
123 | } | |
124 | ||
125 | /* Execute request and wait for completion. */ | |
8e87d142 | 126 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
01df8c31 | 127 | unsigned long opt, __u32 timeout) |
1da177e4 LT |
128 | { |
129 | DECLARE_WAITQUEUE(wait, current); | |
130 | int err = 0; | |
131 | ||
132 | BT_DBG("%s start", hdev->name); | |
133 | ||
134 | hdev->req_status = HCI_REQ_PEND; | |
135 | ||
136 | add_wait_queue(&hdev->req_wait_q, &wait); | |
137 | set_current_state(TASK_INTERRUPTIBLE); | |
138 | ||
139 | req(hdev, opt); | |
140 | schedule_timeout(timeout); | |
141 | ||
142 | remove_wait_queue(&hdev->req_wait_q, &wait); | |
143 | ||
144 | if (signal_pending(current)) | |
145 | return -EINTR; | |
146 | ||
147 | switch (hdev->req_status) { | |
148 | case HCI_REQ_DONE: | |
e175072f | 149 | err = -bt_to_errno(hdev->req_result); |
1da177e4 LT |
150 | break; |
151 | ||
152 | case HCI_REQ_CANCELED: | |
153 | err = -hdev->req_result; | |
154 | break; | |
155 | ||
156 | default: | |
157 | err = -ETIMEDOUT; | |
158 | break; | |
3ff50b79 | 159 | } |
1da177e4 | 160 | |
a5040efa | 161 | hdev->req_status = hdev->req_result = 0; |
1da177e4 LT |
162 | |
163 | BT_DBG("%s end: err %d", hdev->name, err); | |
164 | ||
165 | return err; | |
166 | } | |
167 | ||
168 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), | |
01df8c31 | 169 | unsigned long opt, __u32 timeout) |
1da177e4 LT |
170 | { |
171 | int ret; | |
172 | ||
7c6a329e MH |
173 | if (!test_bit(HCI_UP, &hdev->flags)) |
174 | return -ENETDOWN; | |
175 | ||
1da177e4 LT |
176 | /* Serialize all requests */ |
177 | hci_req_lock(hdev); | |
178 | ret = __hci_request(hdev, req, opt, timeout); | |
179 | hci_req_unlock(hdev); | |
180 | ||
181 | return ret; | |
182 | } | |
183 | ||
184 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) | |
185 | { | |
186 | BT_DBG("%s %ld", hdev->name, opt); | |
187 | ||
188 | /* Reset device */ | |
f630cf0d | 189 | set_bit(HCI_RESET, &hdev->flags); |
a9de9248 | 190 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
1da177e4 LT |
191 | } |
192 | ||
193 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) | |
194 | { | |
b0916ea0 | 195 | struct hci_cp_delete_stored_link_key cp; |
1da177e4 | 196 | struct sk_buff *skb; |
1ebb9252 | 197 | __le16 param; |
89f2783d | 198 | __u8 flt_type; |
1da177e4 LT |
199 | |
200 | BT_DBG("%s %ld", hdev->name, opt); | |
201 | ||
202 | /* Driver initialization */ | |
203 | ||
204 | /* Special commands */ | |
205 | while ((skb = skb_dequeue(&hdev->driver_init))) { | |
0d48d939 | 206 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 207 | skb->dev = (void *) hdev; |
c78ae283 | 208 | |
1da177e4 | 209 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 210 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
211 | } |
212 | skb_queue_purge(&hdev->driver_init); | |
213 | ||
214 | /* Mandatory initialization */ | |
215 | ||
216 | /* Reset */ | |
f630cf0d GP |
217 | if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) { |
218 | set_bit(HCI_RESET, &hdev->flags); | |
a9de9248 | 219 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
f630cf0d | 220 | } |
1da177e4 LT |
221 | |
222 | /* Read Local Supported Features */ | |
a9de9248 | 223 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
1da177e4 | 224 | |
1143e5a6 | 225 | /* Read Local Version */ |
a9de9248 | 226 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
1143e5a6 | 227 | |
1da177e4 | 228 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
a9de9248 | 229 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
1da177e4 LT |
230 | |
231 | #if 0 | |
232 | /* Host buffer size */ | |
233 | { | |
234 | struct hci_cp_host_buffer_size cp; | |
aca3192c | 235 | cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE); |
1da177e4 | 236 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
aca3192c YH |
237 | cp.acl_max_pkt = cpu_to_le16(0xffff); |
238 | cp.sco_max_pkt = cpu_to_le16(0xffff); | |
a9de9248 | 239 | hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
1da177e4 LT |
240 | } |
241 | #endif | |
242 | ||
243 | /* Read BD Address */ | |
a9de9248 MH |
244 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
245 | ||
246 | /* Read Class of Device */ | |
247 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); | |
248 | ||
249 | /* Read Local Name */ | |
250 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); | |
1da177e4 LT |
251 | |
252 | /* Read Voice Setting */ | |
a9de9248 | 253 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
1da177e4 LT |
254 | |
255 | /* Optional initialization */ | |
256 | ||
257 | /* Clear Event Filters */ | |
89f2783d | 258 | flt_type = HCI_FLT_CLEAR_ALL; |
a9de9248 | 259 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
1da177e4 | 260 | |
1da177e4 | 261 | /* Connection accept timeout ~20 secs */ |
aca3192c | 262 | param = cpu_to_le16(0x7d00); |
a9de9248 | 263 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
b0916ea0 JH |
264 | |
265 | bacpy(&cp.bdaddr, BDADDR_ANY); | |
266 | cp.delete_all = 1; | |
267 | hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp); | |
1da177e4 LT |
268 | } |
269 | ||
6ed58ec5 VT |
270 | static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt) |
271 | { | |
272 | BT_DBG("%s", hdev->name); | |
273 | ||
274 | /* Read LE buffer size */ | |
275 | hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL); | |
276 | } | |
277 | ||
1da177e4 LT |
278 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) |
279 | { | |
280 | __u8 scan = opt; | |
281 | ||
282 | BT_DBG("%s %x", hdev->name, scan); | |
283 | ||
284 | /* Inquiry and Page scans */ | |
a9de9248 | 285 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
1da177e4 LT |
286 | } |
287 | ||
288 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) | |
289 | { | |
290 | __u8 auth = opt; | |
291 | ||
292 | BT_DBG("%s %x", hdev->name, auth); | |
293 | ||
294 | /* Authentication */ | |
a9de9248 | 295 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
1da177e4 LT |
296 | } |
297 | ||
298 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) | |
299 | { | |
300 | __u8 encrypt = opt; | |
301 | ||
302 | BT_DBG("%s %x", hdev->name, encrypt); | |
303 | ||
e4e8e37c | 304 | /* Encryption */ |
a9de9248 | 305 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
1da177e4 LT |
306 | } |
307 | ||
e4e8e37c MH |
308 | static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
309 | { | |
310 | __le16 policy = cpu_to_le16(opt); | |
311 | ||
a418b893 | 312 | BT_DBG("%s %x", hdev->name, policy); |
e4e8e37c MH |
313 | |
314 | /* Default link policy */ | |
315 | hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); | |
316 | } | |
317 | ||
8e87d142 | 318 | /* Get HCI device by index. |
1da177e4 LT |
319 | * Device is held on return. */ |
320 | struct hci_dev *hci_dev_get(int index) | |
321 | { | |
8035ded4 | 322 | struct hci_dev *hdev = NULL, *d; |
1da177e4 LT |
323 | |
324 | BT_DBG("%d", index); | |
325 | ||
326 | if (index < 0) | |
327 | return NULL; | |
328 | ||
329 | read_lock(&hci_dev_list_lock); | |
8035ded4 | 330 | list_for_each_entry(d, &hci_dev_list, list) { |
1da177e4 LT |
331 | if (d->id == index) { |
332 | hdev = hci_dev_hold(d); | |
333 | break; | |
334 | } | |
335 | } | |
336 | read_unlock(&hci_dev_list_lock); | |
337 | return hdev; | |
338 | } | |
1da177e4 LT |
339 | |
340 | /* ---- Inquiry support ---- */ | |
341 | static void inquiry_cache_flush(struct hci_dev *hdev) | |
342 | { | |
343 | struct inquiry_cache *cache = &hdev->inq_cache; | |
344 | struct inquiry_entry *next = cache->list, *e; | |
345 | ||
346 | BT_DBG("cache %p", cache); | |
347 | ||
348 | cache->list = NULL; | |
349 | while ((e = next)) { | |
350 | next = e->next; | |
351 | kfree(e); | |
352 | } | |
353 | } | |
354 | ||
355 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
356 | { | |
357 | struct inquiry_cache *cache = &hdev->inq_cache; | |
358 | struct inquiry_entry *e; | |
359 | ||
360 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); | |
361 | ||
362 | for (e = cache->list; e; e = e->next) | |
363 | if (!bacmp(&e->data.bdaddr, bdaddr)) | |
364 | break; | |
365 | return e; | |
366 | } | |
367 | ||
368 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) | |
369 | { | |
370 | struct inquiry_cache *cache = &hdev->inq_cache; | |
70f23020 | 371 | struct inquiry_entry *ie; |
1da177e4 LT |
372 | |
373 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); | |
374 | ||
70f23020 AE |
375 | ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr); |
376 | if (!ie) { | |
1da177e4 | 377 | /* Entry not in the cache. Add new one. */ |
70f23020 AE |
378 | ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC); |
379 | if (!ie) | |
1da177e4 | 380 | return; |
70f23020 AE |
381 | |
382 | ie->next = cache->list; | |
383 | cache->list = ie; | |
1da177e4 LT |
384 | } |
385 | ||
70f23020 AE |
386 | memcpy(&ie->data, data, sizeof(*data)); |
387 | ie->timestamp = jiffies; | |
1da177e4 LT |
388 | cache->timestamp = jiffies; |
389 | } | |
390 | ||
391 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) | |
392 | { | |
393 | struct inquiry_cache *cache = &hdev->inq_cache; | |
394 | struct inquiry_info *info = (struct inquiry_info *) buf; | |
395 | struct inquiry_entry *e; | |
396 | int copied = 0; | |
397 | ||
398 | for (e = cache->list; e && copied < num; e = e->next, copied++) { | |
399 | struct inquiry_data *data = &e->data; | |
400 | bacpy(&info->bdaddr, &data->bdaddr); | |
401 | info->pscan_rep_mode = data->pscan_rep_mode; | |
402 | info->pscan_period_mode = data->pscan_period_mode; | |
403 | info->pscan_mode = data->pscan_mode; | |
404 | memcpy(info->dev_class, data->dev_class, 3); | |
405 | info->clock_offset = data->clock_offset; | |
406 | info++; | |
407 | } | |
408 | ||
409 | BT_DBG("cache %p, copied %d", cache, copied); | |
410 | return copied; | |
411 | } | |
412 | ||
413 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) | |
414 | { | |
415 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; | |
416 | struct hci_cp_inquiry cp; | |
417 | ||
418 | BT_DBG("%s", hdev->name); | |
419 | ||
420 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
421 | return; | |
422 | ||
423 | /* Start Inquiry */ | |
424 | memcpy(&cp.lap, &ir->lap, 3); | |
425 | cp.length = ir->length; | |
426 | cp.num_rsp = ir->num_rsp; | |
a9de9248 | 427 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
1da177e4 LT |
428 | } |
429 | ||
430 | int hci_inquiry(void __user *arg) | |
431 | { | |
432 | __u8 __user *ptr = arg; | |
433 | struct hci_inquiry_req ir; | |
434 | struct hci_dev *hdev; | |
435 | int err = 0, do_inquiry = 0, max_rsp; | |
436 | long timeo; | |
437 | __u8 *buf; | |
438 | ||
439 | if (copy_from_user(&ir, ptr, sizeof(ir))) | |
440 | return -EFAULT; | |
441 | ||
5a08ecce AE |
442 | hdev = hci_dev_get(ir.dev_id); |
443 | if (!hdev) | |
1da177e4 LT |
444 | return -ENODEV; |
445 | ||
446 | hci_dev_lock_bh(hdev); | |
8e87d142 | 447 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
70f23020 AE |
448 | inquiry_cache_empty(hdev) || |
449 | ir.flags & IREQ_CACHE_FLUSH) { | |
1da177e4 LT |
450 | inquiry_cache_flush(hdev); |
451 | do_inquiry = 1; | |
452 | } | |
453 | hci_dev_unlock_bh(hdev); | |
454 | ||
04837f64 | 455 | timeo = ir.length * msecs_to_jiffies(2000); |
70f23020 AE |
456 | |
457 | if (do_inquiry) { | |
458 | err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo); | |
459 | if (err < 0) | |
460 | goto done; | |
461 | } | |
1da177e4 LT |
462 | |
463 | /* for unlimited number of responses we will use buffer with 255 entries */ | |
464 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; | |
465 | ||
466 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then | |
467 | * copy it to the user space. | |
468 | */ | |
01df8c31 | 469 | buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL); |
70f23020 | 470 | if (!buf) { |
1da177e4 LT |
471 | err = -ENOMEM; |
472 | goto done; | |
473 | } | |
474 | ||
475 | hci_dev_lock_bh(hdev); | |
476 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); | |
477 | hci_dev_unlock_bh(hdev); | |
478 | ||
479 | BT_DBG("num_rsp %d", ir.num_rsp); | |
480 | ||
481 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { | |
482 | ptr += sizeof(ir); | |
483 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * | |
484 | ir.num_rsp)) | |
485 | err = -EFAULT; | |
8e87d142 | 486 | } else |
1da177e4 LT |
487 | err = -EFAULT; |
488 | ||
489 | kfree(buf); | |
490 | ||
491 | done: | |
492 | hci_dev_put(hdev); | |
493 | return err; | |
494 | } | |
495 | ||
496 | /* ---- HCI ioctl helpers ---- */ | |
497 | ||
498 | int hci_dev_open(__u16 dev) | |
499 | { | |
500 | struct hci_dev *hdev; | |
501 | int ret = 0; | |
502 | ||
5a08ecce AE |
503 | hdev = hci_dev_get(dev); |
504 | if (!hdev) | |
1da177e4 LT |
505 | return -ENODEV; |
506 | ||
507 | BT_DBG("%s %p", hdev->name, hdev); | |
508 | ||
509 | hci_req_lock(hdev); | |
510 | ||
611b30f7 MH |
511 | if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) { |
512 | ret = -ERFKILL; | |
513 | goto done; | |
514 | } | |
515 | ||
1da177e4 LT |
516 | if (test_bit(HCI_UP, &hdev->flags)) { |
517 | ret = -EALREADY; | |
518 | goto done; | |
519 | } | |
520 | ||
521 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) | |
522 | set_bit(HCI_RAW, &hdev->flags); | |
523 | ||
943da25d MH |
524 | /* Treat all non BR/EDR controllers as raw devices for now */ |
525 | if (hdev->dev_type != HCI_BREDR) | |
526 | set_bit(HCI_RAW, &hdev->flags); | |
527 | ||
1da177e4 LT |
528 | if (hdev->open(hdev)) { |
529 | ret = -EIO; | |
530 | goto done; | |
531 | } | |
532 | ||
533 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
534 | atomic_set(&hdev->cmd_cnt, 1); | |
535 | set_bit(HCI_INIT, &hdev->flags); | |
a5040efa | 536 | hdev->init_last_cmd = 0; |
1da177e4 | 537 | |
04837f64 MH |
538 | ret = __hci_request(hdev, hci_init_req, 0, |
539 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 | 540 | |
eead27da | 541 | if (lmp_host_le_capable(hdev)) |
6ed58ec5 VT |
542 | ret = __hci_request(hdev, hci_le_init_req, 0, |
543 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
544 | ||
1da177e4 LT |
545 | clear_bit(HCI_INIT, &hdev->flags); |
546 | } | |
547 | ||
548 | if (!ret) { | |
549 | hci_dev_hold(hdev); | |
550 | set_bit(HCI_UP, &hdev->flags); | |
551 | hci_notify(hdev, HCI_DEV_UP); | |
5add6af8 JH |
552 | if (!test_bit(HCI_SETUP, &hdev->flags)) |
553 | mgmt_powered(hdev->id, 1); | |
8e87d142 | 554 | } else { |
1da177e4 LT |
555 | /* Init failed, cleanup */ |
556 | tasklet_kill(&hdev->rx_task); | |
557 | tasklet_kill(&hdev->tx_task); | |
558 | tasklet_kill(&hdev->cmd_task); | |
559 | ||
560 | skb_queue_purge(&hdev->cmd_q); | |
561 | skb_queue_purge(&hdev->rx_q); | |
562 | ||
563 | if (hdev->flush) | |
564 | hdev->flush(hdev); | |
565 | ||
566 | if (hdev->sent_cmd) { | |
567 | kfree_skb(hdev->sent_cmd); | |
568 | hdev->sent_cmd = NULL; | |
569 | } | |
570 | ||
571 | hdev->close(hdev); | |
572 | hdev->flags = 0; | |
573 | } | |
574 | ||
575 | done: | |
576 | hci_req_unlock(hdev); | |
577 | hci_dev_put(hdev); | |
578 | return ret; | |
579 | } | |
580 | ||
581 | static int hci_dev_do_close(struct hci_dev *hdev) | |
582 | { | |
583 | BT_DBG("%s %p", hdev->name, hdev); | |
584 | ||
585 | hci_req_cancel(hdev, ENODEV); | |
586 | hci_req_lock(hdev); | |
587 | ||
588 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
b79f44c1 | 589 | del_timer_sync(&hdev->cmd_timer); |
1da177e4 LT |
590 | hci_req_unlock(hdev); |
591 | return 0; | |
592 | } | |
593 | ||
594 | /* Kill RX and TX tasks */ | |
595 | tasklet_kill(&hdev->rx_task); | |
596 | tasklet_kill(&hdev->tx_task); | |
597 | ||
598 | hci_dev_lock_bh(hdev); | |
599 | inquiry_cache_flush(hdev); | |
600 | hci_conn_hash_flush(hdev); | |
601 | hci_dev_unlock_bh(hdev); | |
602 | ||
603 | hci_notify(hdev, HCI_DEV_DOWN); | |
604 | ||
605 | if (hdev->flush) | |
606 | hdev->flush(hdev); | |
607 | ||
608 | /* Reset device */ | |
609 | skb_queue_purge(&hdev->cmd_q); | |
610 | atomic_set(&hdev->cmd_cnt, 1); | |
611 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
612 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 | 613 | __hci_request(hdev, hci_reset_req, 0, |
43611a7b | 614 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
1da177e4 LT |
615 | clear_bit(HCI_INIT, &hdev->flags); |
616 | } | |
617 | ||
618 | /* Kill cmd task */ | |
619 | tasklet_kill(&hdev->cmd_task); | |
620 | ||
621 | /* Drop queues */ | |
622 | skb_queue_purge(&hdev->rx_q); | |
623 | skb_queue_purge(&hdev->cmd_q); | |
624 | skb_queue_purge(&hdev->raw_q); | |
625 | ||
626 | /* Drop last sent command */ | |
627 | if (hdev->sent_cmd) { | |
b79f44c1 | 628 | del_timer_sync(&hdev->cmd_timer); |
1da177e4 LT |
629 | kfree_skb(hdev->sent_cmd); |
630 | hdev->sent_cmd = NULL; | |
631 | } | |
632 | ||
633 | /* After this point our queues are empty | |
634 | * and no tasks are scheduled. */ | |
635 | hdev->close(hdev); | |
636 | ||
5add6af8 JH |
637 | mgmt_powered(hdev->id, 0); |
638 | ||
1da177e4 LT |
639 | /* Clear flags */ |
640 | hdev->flags = 0; | |
641 | ||
642 | hci_req_unlock(hdev); | |
643 | ||
644 | hci_dev_put(hdev); | |
645 | return 0; | |
646 | } | |
647 | ||
648 | int hci_dev_close(__u16 dev) | |
649 | { | |
650 | struct hci_dev *hdev; | |
651 | int err; | |
652 | ||
70f23020 AE |
653 | hdev = hci_dev_get(dev); |
654 | if (!hdev) | |
1da177e4 LT |
655 | return -ENODEV; |
656 | err = hci_dev_do_close(hdev); | |
657 | hci_dev_put(hdev); | |
658 | return err; | |
659 | } | |
660 | ||
661 | int hci_dev_reset(__u16 dev) | |
662 | { | |
663 | struct hci_dev *hdev; | |
664 | int ret = 0; | |
665 | ||
70f23020 AE |
666 | hdev = hci_dev_get(dev); |
667 | if (!hdev) | |
1da177e4 LT |
668 | return -ENODEV; |
669 | ||
670 | hci_req_lock(hdev); | |
671 | tasklet_disable(&hdev->tx_task); | |
672 | ||
673 | if (!test_bit(HCI_UP, &hdev->flags)) | |
674 | goto done; | |
675 | ||
676 | /* Drop queues */ | |
677 | skb_queue_purge(&hdev->rx_q); | |
678 | skb_queue_purge(&hdev->cmd_q); | |
679 | ||
680 | hci_dev_lock_bh(hdev); | |
681 | inquiry_cache_flush(hdev); | |
682 | hci_conn_hash_flush(hdev); | |
683 | hci_dev_unlock_bh(hdev); | |
684 | ||
685 | if (hdev->flush) | |
686 | hdev->flush(hdev); | |
687 | ||
8e87d142 | 688 | atomic_set(&hdev->cmd_cnt, 1); |
6ed58ec5 | 689 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0; |
1da177e4 LT |
690 | |
691 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
692 | ret = __hci_request(hdev, hci_reset_req, 0, |
693 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
694 | |
695 | done: | |
696 | tasklet_enable(&hdev->tx_task); | |
697 | hci_req_unlock(hdev); | |
698 | hci_dev_put(hdev); | |
699 | return ret; | |
700 | } | |
701 | ||
702 | int hci_dev_reset_stat(__u16 dev) | |
703 | { | |
704 | struct hci_dev *hdev; | |
705 | int ret = 0; | |
706 | ||
70f23020 AE |
707 | hdev = hci_dev_get(dev); |
708 | if (!hdev) | |
1da177e4 LT |
709 | return -ENODEV; |
710 | ||
711 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
712 | ||
713 | hci_dev_put(hdev); | |
714 | ||
715 | return ret; | |
716 | } | |
717 | ||
718 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
719 | { | |
720 | struct hci_dev *hdev; | |
721 | struct hci_dev_req dr; | |
722 | int err = 0; | |
723 | ||
724 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
725 | return -EFAULT; | |
726 | ||
70f23020 AE |
727 | hdev = hci_dev_get(dr.dev_id); |
728 | if (!hdev) | |
1da177e4 LT |
729 | return -ENODEV; |
730 | ||
731 | switch (cmd) { | |
732 | case HCISETAUTH: | |
04837f64 MH |
733 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
734 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
735 | break; |
736 | ||
737 | case HCISETENCRYPT: | |
738 | if (!lmp_encrypt_capable(hdev)) { | |
739 | err = -EOPNOTSUPP; | |
740 | break; | |
741 | } | |
742 | ||
743 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
744 | /* Auth must be enabled first */ | |
04837f64 MH |
745 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
746 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
747 | if (err) |
748 | break; | |
749 | } | |
750 | ||
04837f64 MH |
751 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
752 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
753 | break; |
754 | ||
755 | case HCISETSCAN: | |
04837f64 MH |
756 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
757 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
758 | break; |
759 | ||
1da177e4 | 760 | case HCISETLINKPOL: |
e4e8e37c MH |
761 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
762 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
763 | break; |
764 | ||
765 | case HCISETLINKMODE: | |
e4e8e37c MH |
766 | hdev->link_mode = ((__u16) dr.dev_opt) & |
767 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
768 | break; | |
769 | ||
770 | case HCISETPTYPE: | |
771 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
772 | break; |
773 | ||
774 | case HCISETACLMTU: | |
e4e8e37c MH |
775 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
776 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
777 | break; |
778 | ||
779 | case HCISETSCOMTU: | |
e4e8e37c MH |
780 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
781 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
782 | break; |
783 | ||
784 | default: | |
785 | err = -EINVAL; | |
786 | break; | |
787 | } | |
e4e8e37c | 788 | |
1da177e4 LT |
789 | hci_dev_put(hdev); |
790 | return err; | |
791 | } | |
792 | ||
793 | int hci_get_dev_list(void __user *arg) | |
794 | { | |
8035ded4 | 795 | struct hci_dev *hdev; |
1da177e4 LT |
796 | struct hci_dev_list_req *dl; |
797 | struct hci_dev_req *dr; | |
1da177e4 LT |
798 | int n = 0, size, err; |
799 | __u16 dev_num; | |
800 | ||
801 | if (get_user(dev_num, (__u16 __user *) arg)) | |
802 | return -EFAULT; | |
803 | ||
804 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
805 | return -EINVAL; | |
806 | ||
807 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
808 | ||
70f23020 AE |
809 | dl = kzalloc(size, GFP_KERNEL); |
810 | if (!dl) | |
1da177e4 LT |
811 | return -ENOMEM; |
812 | ||
813 | dr = dl->dev_req; | |
814 | ||
815 | read_lock_bh(&hci_dev_list_lock); | |
8035ded4 | 816 | list_for_each_entry(hdev, &hci_dev_list, list) { |
ab81cbf9 | 817 | hci_del_off_timer(hdev); |
c542a06c JH |
818 | |
819 | if (!test_bit(HCI_MGMT, &hdev->flags)) | |
820 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
821 | ||
1da177e4 LT |
822 | (dr + n)->dev_id = hdev->id; |
823 | (dr + n)->dev_opt = hdev->flags; | |
c542a06c | 824 | |
1da177e4 LT |
825 | if (++n >= dev_num) |
826 | break; | |
827 | } | |
828 | read_unlock_bh(&hci_dev_list_lock); | |
829 | ||
830 | dl->dev_num = n; | |
831 | size = sizeof(*dl) + n * sizeof(*dr); | |
832 | ||
833 | err = copy_to_user(arg, dl, size); | |
834 | kfree(dl); | |
835 | ||
836 | return err ? -EFAULT : 0; | |
837 | } | |
838 | ||
839 | int hci_get_dev_info(void __user *arg) | |
840 | { | |
841 | struct hci_dev *hdev; | |
842 | struct hci_dev_info di; | |
843 | int err = 0; | |
844 | ||
845 | if (copy_from_user(&di, arg, sizeof(di))) | |
846 | return -EFAULT; | |
847 | ||
70f23020 AE |
848 | hdev = hci_dev_get(di.dev_id); |
849 | if (!hdev) | |
1da177e4 LT |
850 | return -ENODEV; |
851 | ||
ab81cbf9 JH |
852 | hci_del_off_timer(hdev); |
853 | ||
c542a06c JH |
854 | if (!test_bit(HCI_MGMT, &hdev->flags)) |
855 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
856 | ||
1da177e4 LT |
857 | strcpy(di.name, hdev->name); |
858 | di.bdaddr = hdev->bdaddr; | |
943da25d | 859 | di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4); |
1da177e4 LT |
860 | di.flags = hdev->flags; |
861 | di.pkt_type = hdev->pkt_type; | |
862 | di.acl_mtu = hdev->acl_mtu; | |
863 | di.acl_pkts = hdev->acl_pkts; | |
864 | di.sco_mtu = hdev->sco_mtu; | |
865 | di.sco_pkts = hdev->sco_pkts; | |
866 | di.link_policy = hdev->link_policy; | |
867 | di.link_mode = hdev->link_mode; | |
868 | ||
869 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
870 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
871 | ||
872 | if (copy_to_user(arg, &di, sizeof(di))) | |
873 | err = -EFAULT; | |
874 | ||
875 | hci_dev_put(hdev); | |
876 | ||
877 | return err; | |
878 | } | |
879 | ||
880 | /* ---- Interface to HCI drivers ---- */ | |
881 | ||
611b30f7 MH |
882 | static int hci_rfkill_set_block(void *data, bool blocked) |
883 | { | |
884 | struct hci_dev *hdev = data; | |
885 | ||
886 | BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); | |
887 | ||
888 | if (!blocked) | |
889 | return 0; | |
890 | ||
891 | hci_dev_do_close(hdev); | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
896 | static const struct rfkill_ops hci_rfkill_ops = { | |
897 | .set_block = hci_rfkill_set_block, | |
898 | }; | |
899 | ||
1da177e4 LT |
900 | /* Alloc HCI device */ |
901 | struct hci_dev *hci_alloc_dev(void) | |
902 | { | |
903 | struct hci_dev *hdev; | |
904 | ||
25ea6db0 | 905 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
906 | if (!hdev) |
907 | return NULL; | |
908 | ||
0ac7e700 | 909 | hci_init_sysfs(hdev); |
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 | { | |
8035ded4 | 1005 | struct link_key *k; |
55ed8ca1 | 1006 | |
8035ded4 | 1007 | list_for_each_entry(k, &hdev->link_keys, list) |
55ed8ca1 JH |
1008 | if (bacmp(bdaddr, &k->bdaddr) == 0) |
1009 | return k; | |
55ed8ca1 JH |
1010 | |
1011 | return NULL; | |
1012 | } | |
1013 | ||
d25e28ab JH |
1014 | static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn, |
1015 | u8 key_type, u8 old_key_type) | |
1016 | { | |
1017 | /* Legacy key */ | |
1018 | if (key_type < 0x03) | |
1019 | return 1; | |
1020 | ||
1021 | /* Debug keys are insecure so don't store them persistently */ | |
1022 | if (key_type == HCI_LK_DEBUG_COMBINATION) | |
1023 | return 0; | |
1024 | ||
1025 | /* Changed combination key and there's no previous one */ | |
1026 | if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff) | |
1027 | return 0; | |
1028 | ||
1029 | /* Security mode 3 case */ | |
1030 | if (!conn) | |
1031 | return 1; | |
1032 | ||
1033 | /* Neither local nor remote side had no-bonding as requirement */ | |
1034 | if (conn->auth_type > 0x01 && conn->remote_auth > 0x01) | |
1035 | return 1; | |
1036 | ||
1037 | /* Local side had dedicated bonding as requirement */ | |
1038 | if (conn->auth_type == 0x02 || conn->auth_type == 0x03) | |
1039 | return 1; | |
1040 | ||
1041 | /* Remote side had dedicated bonding as requirement */ | |
1042 | if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03) | |
1043 | return 1; | |
1044 | ||
1045 | /* If none of the above criteria match, then don't store the key | |
1046 | * persistently */ | |
1047 | return 0; | |
1048 | } | |
1049 | ||
75d262c2 VCG |
1050 | struct link_key *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8]) |
1051 | { | |
1052 | struct link_key *k; | |
1053 | ||
1054 | list_for_each_entry(k, &hdev->link_keys, list) { | |
1055 | struct key_master_id *id; | |
1056 | ||
1057 | if (k->type != HCI_LK_SMP_LTK) | |
1058 | continue; | |
1059 | ||
1060 | if (k->dlen != sizeof(*id)) | |
1061 | continue; | |
1062 | ||
1063 | id = (void *) &k->data; | |
1064 | if (id->ediv == ediv && | |
1065 | (memcmp(rand, id->rand, sizeof(id->rand)) == 0)) | |
1066 | return k; | |
1067 | } | |
1068 | ||
1069 | return NULL; | |
1070 | } | |
1071 | EXPORT_SYMBOL(hci_find_ltk); | |
1072 | ||
1073 | struct link_key *hci_find_link_key_type(struct hci_dev *hdev, | |
1074 | bdaddr_t *bdaddr, u8 type) | |
1075 | { | |
1076 | struct link_key *k; | |
1077 | ||
1078 | list_for_each_entry(k, &hdev->link_keys, list) | |
1079 | if (k->type == type && bacmp(bdaddr, &k->bdaddr) == 0) | |
1080 | return k; | |
1081 | ||
1082 | return NULL; | |
1083 | } | |
1084 | EXPORT_SYMBOL(hci_find_link_key_type); | |
1085 | ||
d25e28ab JH |
1086 | int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key, |
1087 | bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len) | |
55ed8ca1 JH |
1088 | { |
1089 | struct link_key *key, *old_key; | |
4df378a1 | 1090 | u8 old_key_type, persistent; |
55ed8ca1 JH |
1091 | |
1092 | old_key = hci_find_link_key(hdev, bdaddr); | |
1093 | if (old_key) { | |
1094 | old_key_type = old_key->type; | |
1095 | key = old_key; | |
1096 | } else { | |
12adcf3a | 1097 | old_key_type = conn ? conn->key_type : 0xff; |
55ed8ca1 JH |
1098 | key = kzalloc(sizeof(*key), GFP_ATOMIC); |
1099 | if (!key) | |
1100 | return -ENOMEM; | |
1101 | list_add(&key->list, &hdev->link_keys); | |
1102 | } | |
1103 | ||
1104 | BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type); | |
1105 | ||
d25e28ab JH |
1106 | /* Some buggy controller combinations generate a changed |
1107 | * combination key for legacy pairing even when there's no | |
1108 | * previous key */ | |
1109 | if (type == HCI_LK_CHANGED_COMBINATION && | |
1110 | (!conn || conn->remote_auth == 0xff) && | |
655fe6ec | 1111 | old_key_type == 0xff) { |
d25e28ab | 1112 | type = HCI_LK_COMBINATION; |
655fe6ec JH |
1113 | if (conn) |
1114 | conn->key_type = type; | |
1115 | } | |
d25e28ab | 1116 | |
55ed8ca1 JH |
1117 | bacpy(&key->bdaddr, bdaddr); |
1118 | memcpy(key->val, val, 16); | |
55ed8ca1 JH |
1119 | key->pin_len = pin_len; |
1120 | ||
b6020ba0 | 1121 | if (type == HCI_LK_CHANGED_COMBINATION) |
55ed8ca1 | 1122 | key->type = old_key_type; |
4748fed2 JH |
1123 | else |
1124 | key->type = type; | |
1125 | ||
4df378a1 JH |
1126 | if (!new_key) |
1127 | return 0; | |
1128 | ||
1129 | persistent = hci_persistent_key(hdev, conn, type, old_key_type); | |
1130 | ||
1131 | mgmt_new_key(hdev->id, key, persistent); | |
1132 | ||
1133 | if (!persistent) { | |
1134 | list_del(&key->list); | |
1135 | kfree(key); | |
1136 | } | |
55ed8ca1 JH |
1137 | |
1138 | return 0; | |
1139 | } | |
1140 | ||
75d262c2 | 1141 | int hci_add_ltk(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr, |
726b4ffc | 1142 | u8 key_size, __le16 ediv, u8 rand[8], u8 ltk[16]) |
75d262c2 VCG |
1143 | { |
1144 | struct link_key *key, *old_key; | |
1145 | struct key_master_id *id; | |
1146 | u8 old_key_type; | |
1147 | ||
1148 | BT_DBG("%s addr %s", hdev->name, batostr(bdaddr)); | |
1149 | ||
1150 | old_key = hci_find_link_key_type(hdev, bdaddr, HCI_LK_SMP_LTK); | |
1151 | if (old_key) { | |
1152 | key = old_key; | |
1153 | old_key_type = old_key->type; | |
1154 | } else { | |
1155 | key = kzalloc(sizeof(*key) + sizeof(*id), GFP_ATOMIC); | |
1156 | if (!key) | |
1157 | return -ENOMEM; | |
1158 | list_add(&key->list, &hdev->link_keys); | |
1159 | old_key_type = 0xff; | |
1160 | } | |
1161 | ||
1162 | key->dlen = sizeof(*id); | |
1163 | ||
1164 | bacpy(&key->bdaddr, bdaddr); | |
1165 | memcpy(key->val, ltk, sizeof(key->val)); | |
1166 | key->type = HCI_LK_SMP_LTK; | |
726b4ffc | 1167 | key->pin_len = key_size; |
75d262c2 VCG |
1168 | |
1169 | id = (void *) &key->data; | |
1170 | id->ediv = ediv; | |
1171 | memcpy(id->rand, rand, sizeof(id->rand)); | |
1172 | ||
1173 | if (new_key) | |
1174 | mgmt_new_key(hdev->id, key, old_key_type); | |
1175 | ||
1176 | return 0; | |
1177 | } | |
1178 | ||
55ed8ca1 JH |
1179 | int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1180 | { | |
1181 | struct link_key *key; | |
1182 | ||
1183 | key = hci_find_link_key(hdev, bdaddr); | |
1184 | if (!key) | |
1185 | return -ENOENT; | |
1186 | ||
1187 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1188 | ||
1189 | list_del(&key->list); | |
1190 | kfree(key); | |
1191 | ||
1192 | return 0; | |
1193 | } | |
1194 | ||
6bd32326 VT |
1195 | /* HCI command timer function */ |
1196 | static void hci_cmd_timer(unsigned long arg) | |
1197 | { | |
1198 | struct hci_dev *hdev = (void *) arg; | |
1199 | ||
1200 | BT_ERR("%s command tx timeout", hdev->name); | |
1201 | atomic_set(&hdev->cmd_cnt, 1); | |
1202 | tasklet_schedule(&hdev->cmd_task); | |
1203 | } | |
1204 | ||
2763eda6 SJ |
1205 | struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev, |
1206 | bdaddr_t *bdaddr) | |
1207 | { | |
1208 | struct oob_data *data; | |
1209 | ||
1210 | list_for_each_entry(data, &hdev->remote_oob_data, list) | |
1211 | if (bacmp(bdaddr, &data->bdaddr) == 0) | |
1212 | return data; | |
1213 | ||
1214 | return NULL; | |
1215 | } | |
1216 | ||
1217 | int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1218 | { | |
1219 | struct oob_data *data; | |
1220 | ||
1221 | data = hci_find_remote_oob_data(hdev, bdaddr); | |
1222 | if (!data) | |
1223 | return -ENOENT; | |
1224 | ||
1225 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1226 | ||
1227 | list_del(&data->list); | |
1228 | kfree(data); | |
1229 | ||
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | int hci_remote_oob_data_clear(struct hci_dev *hdev) | |
1234 | { | |
1235 | struct oob_data *data, *n; | |
1236 | ||
1237 | list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) { | |
1238 | list_del(&data->list); | |
1239 | kfree(data); | |
1240 | } | |
1241 | ||
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash, | |
1246 | u8 *randomizer) | |
1247 | { | |
1248 | struct oob_data *data; | |
1249 | ||
1250 | data = hci_find_remote_oob_data(hdev, bdaddr); | |
1251 | ||
1252 | if (!data) { | |
1253 | data = kmalloc(sizeof(*data), GFP_ATOMIC); | |
1254 | if (!data) | |
1255 | return -ENOMEM; | |
1256 | ||
1257 | bacpy(&data->bdaddr, bdaddr); | |
1258 | list_add(&data->list, &hdev->remote_oob_data); | |
1259 | } | |
1260 | ||
1261 | memcpy(data->hash, hash, sizeof(data->hash)); | |
1262 | memcpy(data->randomizer, randomizer, sizeof(data->randomizer)); | |
1263 | ||
1264 | BT_DBG("%s for %s", hdev->name, batostr(bdaddr)); | |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
b2a66aad AJ |
1269 | struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, |
1270 | bdaddr_t *bdaddr) | |
1271 | { | |
8035ded4 | 1272 | struct bdaddr_list *b; |
b2a66aad | 1273 | |
8035ded4 | 1274 | list_for_each_entry(b, &hdev->blacklist, list) |
b2a66aad AJ |
1275 | if (bacmp(bdaddr, &b->bdaddr) == 0) |
1276 | return b; | |
b2a66aad AJ |
1277 | |
1278 | return NULL; | |
1279 | } | |
1280 | ||
1281 | int hci_blacklist_clear(struct hci_dev *hdev) | |
1282 | { | |
1283 | struct list_head *p, *n; | |
1284 | ||
1285 | list_for_each_safe(p, n, &hdev->blacklist) { | |
1286 | struct bdaddr_list *b; | |
1287 | ||
1288 | b = list_entry(p, struct bdaddr_list, list); | |
1289 | ||
1290 | list_del(p); | |
1291 | kfree(b); | |
1292 | } | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1298 | { | |
1299 | struct bdaddr_list *entry; | |
b2a66aad AJ |
1300 | |
1301 | if (bacmp(bdaddr, BDADDR_ANY) == 0) | |
1302 | return -EBADF; | |
1303 | ||
5e762444 AJ |
1304 | if (hci_blacklist_lookup(hdev, bdaddr)) |
1305 | return -EEXIST; | |
b2a66aad AJ |
1306 | |
1307 | entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL); | |
5e762444 AJ |
1308 | if (!entry) |
1309 | return -ENOMEM; | |
b2a66aad AJ |
1310 | |
1311 | bacpy(&entry->bdaddr, bdaddr); | |
1312 | ||
1313 | list_add(&entry->list, &hdev->blacklist); | |
1314 | ||
5e762444 | 1315 | return mgmt_device_blocked(hdev->id, bdaddr); |
b2a66aad AJ |
1316 | } |
1317 | ||
1318 | int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1319 | { | |
1320 | struct bdaddr_list *entry; | |
b2a66aad | 1321 | |
a7925bd2 | 1322 | if (bacmp(bdaddr, BDADDR_ANY) == 0) { |
5e762444 | 1323 | return hci_blacklist_clear(hdev); |
a7925bd2 | 1324 | } |
b2a66aad AJ |
1325 | |
1326 | entry = hci_blacklist_lookup(hdev, bdaddr); | |
a7925bd2 | 1327 | if (!entry) { |
5e762444 | 1328 | return -ENOENT; |
a7925bd2 | 1329 | } |
b2a66aad AJ |
1330 | |
1331 | list_del(&entry->list); | |
1332 | kfree(entry); | |
1333 | ||
5e762444 | 1334 | return mgmt_device_unblocked(hdev->id, bdaddr); |
b2a66aad AJ |
1335 | } |
1336 | ||
35815085 AG |
1337 | static void hci_clear_adv_cache(unsigned long arg) |
1338 | { | |
1339 | struct hci_dev *hdev = (void *) arg; | |
1340 | ||
1341 | hci_dev_lock(hdev); | |
1342 | ||
1343 | hci_adv_entries_clear(hdev); | |
1344 | ||
1345 | hci_dev_unlock(hdev); | |
1346 | } | |
1347 | ||
76c8686f AG |
1348 | int hci_adv_entries_clear(struct hci_dev *hdev) |
1349 | { | |
1350 | struct adv_entry *entry, *tmp; | |
1351 | ||
1352 | list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) { | |
1353 | list_del(&entry->list); | |
1354 | kfree(entry); | |
1355 | } | |
1356 | ||
1357 | BT_DBG("%s adv cache cleared", hdev->name); | |
1358 | ||
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1363 | { | |
1364 | struct adv_entry *entry; | |
1365 | ||
1366 | list_for_each_entry(entry, &hdev->adv_entries, list) | |
1367 | if (bacmp(bdaddr, &entry->bdaddr) == 0) | |
1368 | return entry; | |
1369 | ||
1370 | return NULL; | |
1371 | } | |
1372 | ||
1373 | static inline int is_connectable_adv(u8 evt_type) | |
1374 | { | |
1375 | if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND) | |
1376 | return 1; | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | int hci_add_adv_entry(struct hci_dev *hdev, | |
1382 | struct hci_ev_le_advertising_info *ev) | |
1383 | { | |
1384 | struct adv_entry *entry; | |
1385 | ||
1386 | if (!is_connectable_adv(ev->evt_type)) | |
1387 | return -EINVAL; | |
1388 | ||
1389 | /* Only new entries should be added to adv_entries. So, if | |
1390 | * bdaddr was found, don't add it. */ | |
1391 | if (hci_find_adv_entry(hdev, &ev->bdaddr)) | |
1392 | return 0; | |
1393 | ||
1394 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); | |
1395 | if (!entry) | |
1396 | return -ENOMEM; | |
1397 | ||
1398 | bacpy(&entry->bdaddr, &ev->bdaddr); | |
1399 | entry->bdaddr_type = ev->bdaddr_type; | |
1400 | ||
1401 | list_add(&entry->list, &hdev->adv_entries); | |
1402 | ||
1403 | BT_DBG("%s adv entry added: address %s type %u", hdev->name, | |
1404 | batostr(&entry->bdaddr), entry->bdaddr_type); | |
1405 | ||
1406 | return 0; | |
1407 | } | |
1408 | ||
1da177e4 LT |
1409 | /* Register HCI device */ |
1410 | int hci_register_dev(struct hci_dev *hdev) | |
1411 | { | |
1412 | struct list_head *head = &hci_dev_list, *p; | |
33ca954d | 1413 | int i, id = 0, error; |
1da177e4 | 1414 | |
c13854ce MH |
1415 | BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name, |
1416 | hdev->bus, hdev->owner); | |
1da177e4 LT |
1417 | |
1418 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
1419 | return -EINVAL; | |
1420 | ||
1421 | write_lock_bh(&hci_dev_list_lock); | |
1422 | ||
1423 | /* Find first available device id */ | |
1424 | list_for_each(p, &hci_dev_list) { | |
1425 | if (list_entry(p, struct hci_dev, list)->id != id) | |
1426 | break; | |
1427 | head = p; id++; | |
1428 | } | |
8e87d142 | 1429 | |
1da177e4 LT |
1430 | sprintf(hdev->name, "hci%d", id); |
1431 | hdev->id = id; | |
1432 | list_add(&hdev->list, head); | |
1433 | ||
1434 | atomic_set(&hdev->refcnt, 1); | |
1435 | spin_lock_init(&hdev->lock); | |
1436 | ||
1437 | hdev->flags = 0; | |
1438 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 1439 | hdev->esco_type = (ESCO_HV1); |
1da177e4 | 1440 | hdev->link_mode = (HCI_LM_ACCEPT); |
17fa4b9d | 1441 | hdev->io_capability = 0x03; /* No Input No Output */ |
1da177e4 | 1442 | |
04837f64 MH |
1443 | hdev->idle_timeout = 0; |
1444 | hdev->sniff_max_interval = 800; | |
1445 | hdev->sniff_min_interval = 80; | |
1446 | ||
70f23020 | 1447 | tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev); |
1da177e4 LT |
1448 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); |
1449 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
1450 | ||
1451 | skb_queue_head_init(&hdev->rx_q); | |
1452 | skb_queue_head_init(&hdev->cmd_q); | |
1453 | skb_queue_head_init(&hdev->raw_q); | |
1454 | ||
6bd32326 VT |
1455 | setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev); |
1456 | ||
cd4c5391 | 1457 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1458 | hdev->reassembly[i] = NULL; |
1459 | ||
1da177e4 | 1460 | init_waitqueue_head(&hdev->req_wait_q); |
a6a67efd | 1461 | mutex_init(&hdev->req_lock); |
1da177e4 LT |
1462 | |
1463 | inquiry_cache_init(hdev); | |
1464 | ||
1465 | hci_conn_hash_init(hdev); | |
1466 | ||
ea4bd8ba | 1467 | INIT_LIST_HEAD(&hdev->blacklist); |
f0358568 | 1468 | |
2aeb9a1a JH |
1469 | INIT_LIST_HEAD(&hdev->uuids); |
1470 | ||
55ed8ca1 JH |
1471 | INIT_LIST_HEAD(&hdev->link_keys); |
1472 | ||
2763eda6 SJ |
1473 | INIT_LIST_HEAD(&hdev->remote_oob_data); |
1474 | ||
76c8686f | 1475 | INIT_LIST_HEAD(&hdev->adv_entries); |
35815085 AG |
1476 | setup_timer(&hdev->adv_timer, hci_clear_adv_cache, |
1477 | (unsigned long) hdev); | |
76c8686f | 1478 | |
ab81cbf9 JH |
1479 | INIT_WORK(&hdev->power_on, hci_power_on); |
1480 | INIT_WORK(&hdev->power_off, hci_power_off); | |
1481 | setup_timer(&hdev->off_timer, hci_auto_off, (unsigned long) hdev); | |
1482 | ||
1da177e4 LT |
1483 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
1484 | ||
1485 | atomic_set(&hdev->promisc, 0); | |
1486 | ||
1487 | write_unlock_bh(&hci_dev_list_lock); | |
1488 | ||
f48fd9c8 | 1489 | hdev->workqueue = create_singlethread_workqueue(hdev->name); |
33ca954d DH |
1490 | if (!hdev->workqueue) { |
1491 | error = -ENOMEM; | |
1492 | goto err; | |
1493 | } | |
f48fd9c8 | 1494 | |
33ca954d DH |
1495 | error = hci_add_sysfs(hdev); |
1496 | if (error < 0) | |
1497 | goto err_wqueue; | |
1da177e4 | 1498 | |
611b30f7 MH |
1499 | hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
1500 | RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev); | |
1501 | if (hdev->rfkill) { | |
1502 | if (rfkill_register(hdev->rfkill) < 0) { | |
1503 | rfkill_destroy(hdev->rfkill); | |
1504 | hdev->rfkill = NULL; | |
1505 | } | |
1506 | } | |
1507 | ||
ab81cbf9 JH |
1508 | set_bit(HCI_AUTO_OFF, &hdev->flags); |
1509 | set_bit(HCI_SETUP, &hdev->flags); | |
1510 | queue_work(hdev->workqueue, &hdev->power_on); | |
1511 | ||
1da177e4 LT |
1512 | hci_notify(hdev, HCI_DEV_REG); |
1513 | ||
1514 | return id; | |
f48fd9c8 | 1515 | |
33ca954d DH |
1516 | err_wqueue: |
1517 | destroy_workqueue(hdev->workqueue); | |
1518 | err: | |
f48fd9c8 MH |
1519 | write_lock_bh(&hci_dev_list_lock); |
1520 | list_del(&hdev->list); | |
1521 | write_unlock_bh(&hci_dev_list_lock); | |
1522 | ||
33ca954d | 1523 | return error; |
1da177e4 LT |
1524 | } |
1525 | EXPORT_SYMBOL(hci_register_dev); | |
1526 | ||
1527 | /* Unregister HCI device */ | |
59735631 | 1528 | void hci_unregister_dev(struct hci_dev *hdev) |
1da177e4 | 1529 | { |
ef222013 MH |
1530 | int i; |
1531 | ||
c13854ce | 1532 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
1da177e4 | 1533 | |
1da177e4 LT |
1534 | write_lock_bh(&hci_dev_list_lock); |
1535 | list_del(&hdev->list); | |
1536 | write_unlock_bh(&hci_dev_list_lock); | |
1537 | ||
1538 | hci_dev_do_close(hdev); | |
1539 | ||
cd4c5391 | 1540 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1541 | kfree_skb(hdev->reassembly[i]); |
1542 | ||
ab81cbf9 JH |
1543 | if (!test_bit(HCI_INIT, &hdev->flags) && |
1544 | !test_bit(HCI_SETUP, &hdev->flags)) | |
1545 | mgmt_index_removed(hdev->id); | |
1546 | ||
1da177e4 LT |
1547 | hci_notify(hdev, HCI_DEV_UNREG); |
1548 | ||
611b30f7 MH |
1549 | if (hdev->rfkill) { |
1550 | rfkill_unregister(hdev->rfkill); | |
1551 | rfkill_destroy(hdev->rfkill); | |
1552 | } | |
1553 | ||
ce242970 | 1554 | hci_del_sysfs(hdev); |
147e2d59 | 1555 | |
c6f3c5f7 | 1556 | hci_del_off_timer(hdev); |
35815085 | 1557 | del_timer(&hdev->adv_timer); |
c6f3c5f7 | 1558 | |
f48fd9c8 MH |
1559 | destroy_workqueue(hdev->workqueue); |
1560 | ||
e2e0cacb JH |
1561 | hci_dev_lock_bh(hdev); |
1562 | hci_blacklist_clear(hdev); | |
2aeb9a1a | 1563 | hci_uuids_clear(hdev); |
55ed8ca1 | 1564 | hci_link_keys_clear(hdev); |
2763eda6 | 1565 | hci_remote_oob_data_clear(hdev); |
76c8686f | 1566 | hci_adv_entries_clear(hdev); |
e2e0cacb JH |
1567 | hci_dev_unlock_bh(hdev); |
1568 | ||
1da177e4 | 1569 | __hci_dev_put(hdev); |
1da177e4 LT |
1570 | } |
1571 | EXPORT_SYMBOL(hci_unregister_dev); | |
1572 | ||
1573 | /* Suspend HCI device */ | |
1574 | int hci_suspend_dev(struct hci_dev *hdev) | |
1575 | { | |
1576 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
1577 | return 0; | |
1578 | } | |
1579 | EXPORT_SYMBOL(hci_suspend_dev); | |
1580 | ||
1581 | /* Resume HCI device */ | |
1582 | int hci_resume_dev(struct hci_dev *hdev) | |
1583 | { | |
1584 | hci_notify(hdev, HCI_DEV_RESUME); | |
1585 | return 0; | |
1586 | } | |
1587 | EXPORT_SYMBOL(hci_resume_dev); | |
1588 | ||
76bca880 MH |
1589 | /* Receive frame from HCI drivers */ |
1590 | int hci_recv_frame(struct sk_buff *skb) | |
1591 | { | |
1592 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1593 | if (!hdev || (!test_bit(HCI_UP, &hdev->flags) | |
1594 | && !test_bit(HCI_INIT, &hdev->flags))) { | |
1595 | kfree_skb(skb); | |
1596 | return -ENXIO; | |
1597 | } | |
1598 | ||
1599 | /* Incomming skb */ | |
1600 | bt_cb(skb)->incoming = 1; | |
1601 | ||
1602 | /* Time stamp */ | |
1603 | __net_timestamp(skb); | |
1604 | ||
1605 | /* Queue frame for rx task */ | |
1606 | skb_queue_tail(&hdev->rx_q, skb); | |
c78ae283 MH |
1607 | tasklet_schedule(&hdev->rx_task); |
1608 | ||
76bca880 MH |
1609 | return 0; |
1610 | } | |
1611 | EXPORT_SYMBOL(hci_recv_frame); | |
1612 | ||
33e882a5 | 1613 | static int hci_reassembly(struct hci_dev *hdev, int type, void *data, |
1e429f38 | 1614 | int count, __u8 index) |
33e882a5 SS |
1615 | { |
1616 | int len = 0; | |
1617 | int hlen = 0; | |
1618 | int remain = count; | |
1619 | struct sk_buff *skb; | |
1620 | struct bt_skb_cb *scb; | |
1621 | ||
1622 | if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) || | |
1623 | index >= NUM_REASSEMBLY) | |
1624 | return -EILSEQ; | |
1625 | ||
1626 | skb = hdev->reassembly[index]; | |
1627 | ||
1628 | if (!skb) { | |
1629 | switch (type) { | |
1630 | case HCI_ACLDATA_PKT: | |
1631 | len = HCI_MAX_FRAME_SIZE; | |
1632 | hlen = HCI_ACL_HDR_SIZE; | |
1633 | break; | |
1634 | case HCI_EVENT_PKT: | |
1635 | len = HCI_MAX_EVENT_SIZE; | |
1636 | hlen = HCI_EVENT_HDR_SIZE; | |
1637 | break; | |
1638 | case HCI_SCODATA_PKT: | |
1639 | len = HCI_MAX_SCO_SIZE; | |
1640 | hlen = HCI_SCO_HDR_SIZE; | |
1641 | break; | |
1642 | } | |
1643 | ||
1e429f38 | 1644 | skb = bt_skb_alloc(len, GFP_ATOMIC); |
33e882a5 SS |
1645 | if (!skb) |
1646 | return -ENOMEM; | |
1647 | ||
1648 | scb = (void *) skb->cb; | |
1649 | scb->expect = hlen; | |
1650 | scb->pkt_type = type; | |
1651 | ||
1652 | skb->dev = (void *) hdev; | |
1653 | hdev->reassembly[index] = skb; | |
1654 | } | |
1655 | ||
1656 | while (count) { | |
1657 | scb = (void *) skb->cb; | |
1658 | len = min(scb->expect, (__u16)count); | |
1659 | ||
1660 | memcpy(skb_put(skb, len), data, len); | |
1661 | ||
1662 | count -= len; | |
1663 | data += len; | |
1664 | scb->expect -= len; | |
1665 | remain = count; | |
1666 | ||
1667 | switch (type) { | |
1668 | case HCI_EVENT_PKT: | |
1669 | if (skb->len == HCI_EVENT_HDR_SIZE) { | |
1670 | struct hci_event_hdr *h = hci_event_hdr(skb); | |
1671 | scb->expect = h->plen; | |
1672 | ||
1673 | if (skb_tailroom(skb) < scb->expect) { | |
1674 | kfree_skb(skb); | |
1675 | hdev->reassembly[index] = NULL; | |
1676 | return -ENOMEM; | |
1677 | } | |
1678 | } | |
1679 | break; | |
1680 | ||
1681 | case HCI_ACLDATA_PKT: | |
1682 | if (skb->len == HCI_ACL_HDR_SIZE) { | |
1683 | struct hci_acl_hdr *h = hci_acl_hdr(skb); | |
1684 | scb->expect = __le16_to_cpu(h->dlen); | |
1685 | ||
1686 | if (skb_tailroom(skb) < scb->expect) { | |
1687 | kfree_skb(skb); | |
1688 | hdev->reassembly[index] = NULL; | |
1689 | return -ENOMEM; | |
1690 | } | |
1691 | } | |
1692 | break; | |
1693 | ||
1694 | case HCI_SCODATA_PKT: | |
1695 | if (skb->len == HCI_SCO_HDR_SIZE) { | |
1696 | struct hci_sco_hdr *h = hci_sco_hdr(skb); | |
1697 | scb->expect = h->dlen; | |
1698 | ||
1699 | if (skb_tailroom(skb) < scb->expect) { | |
1700 | kfree_skb(skb); | |
1701 | hdev->reassembly[index] = NULL; | |
1702 | return -ENOMEM; | |
1703 | } | |
1704 | } | |
1705 | break; | |
1706 | } | |
1707 | ||
1708 | if (scb->expect == 0) { | |
1709 | /* Complete frame */ | |
1710 | ||
1711 | bt_cb(skb)->pkt_type = type; | |
1712 | hci_recv_frame(skb); | |
1713 | ||
1714 | hdev->reassembly[index] = NULL; | |
1715 | return remain; | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | return remain; | |
1720 | } | |
1721 | ||
ef222013 MH |
1722 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) |
1723 | { | |
f39a3c06 SS |
1724 | int rem = 0; |
1725 | ||
ef222013 MH |
1726 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) |
1727 | return -EILSEQ; | |
1728 | ||
da5f6c37 | 1729 | while (count) { |
1e429f38 | 1730 | rem = hci_reassembly(hdev, type, data, count, type - 1); |
f39a3c06 SS |
1731 | if (rem < 0) |
1732 | return rem; | |
ef222013 | 1733 | |
f39a3c06 SS |
1734 | data += (count - rem); |
1735 | count = rem; | |
f81c6224 | 1736 | } |
ef222013 | 1737 | |
f39a3c06 | 1738 | return rem; |
ef222013 MH |
1739 | } |
1740 | EXPORT_SYMBOL(hci_recv_fragment); | |
1741 | ||
99811510 SS |
1742 | #define STREAM_REASSEMBLY 0 |
1743 | ||
1744 | int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count) | |
1745 | { | |
1746 | int type; | |
1747 | int rem = 0; | |
1748 | ||
da5f6c37 | 1749 | while (count) { |
99811510 SS |
1750 | struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY]; |
1751 | ||
1752 | if (!skb) { | |
1753 | struct { char type; } *pkt; | |
1754 | ||
1755 | /* Start of the frame */ | |
1756 | pkt = data; | |
1757 | type = pkt->type; | |
1758 | ||
1759 | data++; | |
1760 | count--; | |
1761 | } else | |
1762 | type = bt_cb(skb)->pkt_type; | |
1763 | ||
1e429f38 GP |
1764 | rem = hci_reassembly(hdev, type, data, count, |
1765 | STREAM_REASSEMBLY); | |
99811510 SS |
1766 | if (rem < 0) |
1767 | return rem; | |
1768 | ||
1769 | data += (count - rem); | |
1770 | count = rem; | |
f81c6224 | 1771 | } |
99811510 SS |
1772 | |
1773 | return rem; | |
1774 | } | |
1775 | EXPORT_SYMBOL(hci_recv_stream_fragment); | |
1776 | ||
1da177e4 LT |
1777 | /* ---- Interface to upper protocols ---- */ |
1778 | ||
1779 | /* Register/Unregister protocols. | |
1780 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1781 | int hci_register_proto(struct hci_proto *hp) | |
1782 | { | |
1783 | int err = 0; | |
1784 | ||
1785 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1786 | ||
1787 | if (hp->id >= HCI_MAX_PROTO) | |
1788 | return -EINVAL; | |
1789 | ||
1790 | write_lock_bh(&hci_task_lock); | |
1791 | ||
1792 | if (!hci_proto[hp->id]) | |
1793 | hci_proto[hp->id] = hp; | |
1794 | else | |
1795 | err = -EEXIST; | |
1796 | ||
1797 | write_unlock_bh(&hci_task_lock); | |
1798 | ||
1799 | return err; | |
1800 | } | |
1801 | EXPORT_SYMBOL(hci_register_proto); | |
1802 | ||
1803 | int hci_unregister_proto(struct hci_proto *hp) | |
1804 | { | |
1805 | int err = 0; | |
1806 | ||
1807 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1808 | ||
1809 | if (hp->id >= HCI_MAX_PROTO) | |
1810 | return -EINVAL; | |
1811 | ||
1812 | write_lock_bh(&hci_task_lock); | |
1813 | ||
1814 | if (hci_proto[hp->id]) | |
1815 | hci_proto[hp->id] = NULL; | |
1816 | else | |
1817 | err = -ENOENT; | |
1818 | ||
1819 | write_unlock_bh(&hci_task_lock); | |
1820 | ||
1821 | return err; | |
1822 | } | |
1823 | EXPORT_SYMBOL(hci_unregister_proto); | |
1824 | ||
1825 | int hci_register_cb(struct hci_cb *cb) | |
1826 | { | |
1827 | BT_DBG("%p name %s", cb, cb->name); | |
1828 | ||
1829 | write_lock_bh(&hci_cb_list_lock); | |
1830 | list_add(&cb->list, &hci_cb_list); | |
1831 | write_unlock_bh(&hci_cb_list_lock); | |
1832 | ||
1833 | return 0; | |
1834 | } | |
1835 | EXPORT_SYMBOL(hci_register_cb); | |
1836 | ||
1837 | int hci_unregister_cb(struct hci_cb *cb) | |
1838 | { | |
1839 | BT_DBG("%p name %s", cb, cb->name); | |
1840 | ||
1841 | write_lock_bh(&hci_cb_list_lock); | |
1842 | list_del(&cb->list); | |
1843 | write_unlock_bh(&hci_cb_list_lock); | |
1844 | ||
1845 | return 0; | |
1846 | } | |
1847 | EXPORT_SYMBOL(hci_unregister_cb); | |
1848 | ||
1849 | static int hci_send_frame(struct sk_buff *skb) | |
1850 | { | |
1851 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1852 | ||
1853 | if (!hdev) { | |
1854 | kfree_skb(skb); | |
1855 | return -ENODEV; | |
1856 | } | |
1857 | ||
0d48d939 | 1858 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1859 | |
1860 | if (atomic_read(&hdev->promisc)) { | |
1861 | /* Time stamp */ | |
a61bbcf2 | 1862 | __net_timestamp(skb); |
1da177e4 | 1863 | |
eec8d2bc | 1864 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
1865 | } |
1866 | ||
1867 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1868 | skb_orphan(skb); | |
1869 | ||
1870 | return hdev->send(skb); | |
1871 | } | |
1872 | ||
1873 | /* Send HCI command */ | |
a9de9248 | 1874 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1875 | { |
1876 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1877 | struct hci_command_hdr *hdr; | |
1878 | struct sk_buff *skb; | |
1879 | ||
a9de9248 | 1880 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1881 | |
1882 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1883 | if (!skb) { | |
ef222013 | 1884 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1885 | return -ENOMEM; |
1886 | } | |
1887 | ||
1888 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1889 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1890 | hdr->plen = plen; |
1891 | ||
1892 | if (plen) | |
1893 | memcpy(skb_put(skb, plen), param, plen); | |
1894 | ||
1895 | BT_DBG("skb len %d", skb->len); | |
1896 | ||
0d48d939 | 1897 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 1898 | skb->dev = (void *) hdev; |
c78ae283 | 1899 | |
a5040efa JH |
1900 | if (test_bit(HCI_INIT, &hdev->flags)) |
1901 | hdev->init_last_cmd = opcode; | |
1902 | ||
1da177e4 | 1903 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 1904 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
1905 | |
1906 | return 0; | |
1907 | } | |
1da177e4 LT |
1908 | |
1909 | /* Get data from the previously sent command */ | |
a9de9248 | 1910 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1911 | { |
1912 | struct hci_command_hdr *hdr; | |
1913 | ||
1914 | if (!hdev->sent_cmd) | |
1915 | return NULL; | |
1916 | ||
1917 | hdr = (void *) hdev->sent_cmd->data; | |
1918 | ||
a9de9248 | 1919 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1920 | return NULL; |
1921 | ||
a9de9248 | 1922 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1923 | |
1924 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1925 | } | |
1926 | ||
1927 | /* Send ACL data */ | |
1928 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1929 | { | |
1930 | struct hci_acl_hdr *hdr; | |
1931 | int len = skb->len; | |
1932 | ||
badff6d0 ACM |
1933 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1934 | skb_reset_transport_header(skb); | |
9c70220b | 1935 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1936 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1937 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1938 | } |
1939 | ||
9a9c6a34 | 1940 | void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) |
1da177e4 LT |
1941 | { |
1942 | struct hci_dev *hdev = conn->hdev; | |
1943 | struct sk_buff *list; | |
1944 | ||
1945 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); | |
1946 | ||
1947 | skb->dev = (void *) hdev; | |
0d48d939 | 1948 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 1949 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 | 1950 | |
70f23020 AE |
1951 | list = skb_shinfo(skb)->frag_list; |
1952 | if (!list) { | |
1da177e4 LT |
1953 | /* Non fragmented */ |
1954 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1955 | ||
1956 | skb_queue_tail(&conn->data_q, skb); | |
1957 | } else { | |
1958 | /* Fragmented */ | |
1959 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1960 | ||
1961 | skb_shinfo(skb)->frag_list = NULL; | |
1962 | ||
1963 | /* Queue all fragments atomically */ | |
1964 | spin_lock_bh(&conn->data_q.lock); | |
1965 | ||
1966 | __skb_queue_tail(&conn->data_q, skb); | |
e702112f AE |
1967 | |
1968 | flags &= ~ACL_START; | |
1969 | flags |= ACL_CONT; | |
1da177e4 LT |
1970 | do { |
1971 | skb = list; list = list->next; | |
8e87d142 | 1972 | |
1da177e4 | 1973 | skb->dev = (void *) hdev; |
0d48d939 | 1974 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 1975 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 LT |
1976 | |
1977 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1978 | ||
1979 | __skb_queue_tail(&conn->data_q, skb); | |
1980 | } while (list); | |
1981 | ||
1982 | spin_unlock_bh(&conn->data_q.lock); | |
1983 | } | |
1984 | ||
c78ae283 | 1985 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
1986 | } |
1987 | EXPORT_SYMBOL(hci_send_acl); | |
1988 | ||
1989 | /* Send SCO data */ | |
0d861d8b | 1990 | void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
1991 | { |
1992 | struct hci_dev *hdev = conn->hdev; | |
1993 | struct hci_sco_hdr hdr; | |
1994 | ||
1995 | BT_DBG("%s len %d", hdev->name, skb->len); | |
1996 | ||
aca3192c | 1997 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
1998 | hdr.dlen = skb->len; |
1999 | ||
badff6d0 ACM |
2000 | skb_push(skb, HCI_SCO_HDR_SIZE); |
2001 | skb_reset_transport_header(skb); | |
9c70220b | 2002 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
2003 | |
2004 | skb->dev = (void *) hdev; | |
0d48d939 | 2005 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
c78ae283 | 2006 | |
1da177e4 | 2007 | skb_queue_tail(&conn->data_q, skb); |
c78ae283 | 2008 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
2009 | } |
2010 | EXPORT_SYMBOL(hci_send_sco); | |
2011 | ||
2012 | /* ---- HCI TX task (outgoing data) ---- */ | |
2013 | ||
2014 | /* HCI Connection scheduler */ | |
2015 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
2016 | { | |
2017 | struct hci_conn_hash *h = &hdev->conn_hash; | |
8035ded4 | 2018 | struct hci_conn *conn = NULL, *c; |
1da177e4 | 2019 | int num = 0, min = ~0; |
1da177e4 | 2020 | |
8e87d142 | 2021 | /* We don't have to lock device here. Connections are always |
1da177e4 | 2022 | * added and removed with TX task disabled. */ |
8035ded4 | 2023 | list_for_each_entry(c, &h->list, list) { |
769be974 | 2024 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 2025 | continue; |
769be974 MH |
2026 | |
2027 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
2028 | continue; | |
2029 | ||
1da177e4 LT |
2030 | num++; |
2031 | ||
2032 | if (c->sent < min) { | |
2033 | min = c->sent; | |
2034 | conn = c; | |
2035 | } | |
52087a79 LAD |
2036 | |
2037 | if (hci_conn_num(hdev, type) == num) | |
2038 | break; | |
1da177e4 LT |
2039 | } |
2040 | ||
2041 | if (conn) { | |
6ed58ec5 VT |
2042 | int cnt, q; |
2043 | ||
2044 | switch (conn->type) { | |
2045 | case ACL_LINK: | |
2046 | cnt = hdev->acl_cnt; | |
2047 | break; | |
2048 | case SCO_LINK: | |
2049 | case ESCO_LINK: | |
2050 | cnt = hdev->sco_cnt; | |
2051 | break; | |
2052 | case LE_LINK: | |
2053 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; | |
2054 | break; | |
2055 | default: | |
2056 | cnt = 0; | |
2057 | BT_ERR("Unknown link type"); | |
2058 | } | |
2059 | ||
2060 | q = cnt / num; | |
1da177e4 LT |
2061 | *quote = q ? q : 1; |
2062 | } else | |
2063 | *quote = 0; | |
2064 | ||
2065 | BT_DBG("conn %p quote %d", conn, *quote); | |
2066 | return conn; | |
2067 | } | |
2068 | ||
bae1f5d9 | 2069 | static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type) |
1da177e4 LT |
2070 | { |
2071 | struct hci_conn_hash *h = &hdev->conn_hash; | |
8035ded4 | 2072 | struct hci_conn *c; |
1da177e4 | 2073 | |
bae1f5d9 | 2074 | BT_ERR("%s link tx timeout", hdev->name); |
1da177e4 LT |
2075 | |
2076 | /* Kill stalled connections */ | |
8035ded4 | 2077 | list_for_each_entry(c, &h->list, list) { |
bae1f5d9 VT |
2078 | if (c->type == type && c->sent) { |
2079 | BT_ERR("%s killing stalled connection %s", | |
1da177e4 LT |
2080 | hdev->name, batostr(&c->dst)); |
2081 | hci_acl_disconn(c, 0x13); | |
2082 | } | |
2083 | } | |
2084 | } | |
2085 | ||
2086 | static inline void hci_sched_acl(struct hci_dev *hdev) | |
2087 | { | |
2088 | struct hci_conn *conn; | |
2089 | struct sk_buff *skb; | |
2090 | int quote; | |
2091 | ||
2092 | BT_DBG("%s", hdev->name); | |
2093 | ||
52087a79 LAD |
2094 | if (!hci_conn_num(hdev, ACL_LINK)) |
2095 | return; | |
2096 | ||
1da177e4 LT |
2097 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
2098 | /* ACL tx timeout must be longer than maximum | |
2099 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 2100 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
bae1f5d9 | 2101 | hci_link_tx_to(hdev, ACL_LINK); |
1da177e4 LT |
2102 | } |
2103 | ||
2104 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { | |
2105 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
2106 | BT_DBG("skb %p len %d", skb, skb->len); | |
04837f64 | 2107 | |
14b12d0b | 2108 | hci_conn_enter_active_mode(conn, bt_cb(skb)->force_active); |
04837f64 | 2109 | |
1da177e4 LT |
2110 | hci_send_frame(skb); |
2111 | hdev->acl_last_tx = jiffies; | |
2112 | ||
2113 | hdev->acl_cnt--; | |
2114 | conn->sent++; | |
2115 | } | |
2116 | } | |
2117 | } | |
2118 | ||
2119 | /* Schedule SCO */ | |
2120 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
2121 | { | |
2122 | struct hci_conn *conn; | |
2123 | struct sk_buff *skb; | |
2124 | int quote; | |
2125 | ||
2126 | BT_DBG("%s", hdev->name); | |
2127 | ||
52087a79 LAD |
2128 | if (!hci_conn_num(hdev, SCO_LINK)) |
2129 | return; | |
2130 | ||
1da177e4 LT |
2131 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { |
2132 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
2133 | BT_DBG("skb %p len %d", skb, skb->len); | |
2134 | hci_send_frame(skb); | |
2135 | ||
2136 | conn->sent++; | |
2137 | if (conn->sent == ~0) | |
2138 | conn->sent = 0; | |
2139 | } | |
2140 | } | |
2141 | } | |
2142 | ||
b6a0dc82 MH |
2143 | static inline void hci_sched_esco(struct hci_dev *hdev) |
2144 | { | |
2145 | struct hci_conn *conn; | |
2146 | struct sk_buff *skb; | |
2147 | int quote; | |
2148 | ||
2149 | BT_DBG("%s", hdev->name); | |
2150 | ||
52087a79 LAD |
2151 | if (!hci_conn_num(hdev, ESCO_LINK)) |
2152 | return; | |
2153 | ||
b6a0dc82 MH |
2154 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { |
2155 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
2156 | BT_DBG("skb %p len %d", skb, skb->len); | |
2157 | hci_send_frame(skb); | |
2158 | ||
2159 | conn->sent++; | |
2160 | if (conn->sent == ~0) | |
2161 | conn->sent = 0; | |
2162 | } | |
2163 | } | |
2164 | } | |
2165 | ||
6ed58ec5 VT |
2166 | static inline void hci_sched_le(struct hci_dev *hdev) |
2167 | { | |
2168 | struct hci_conn *conn; | |
2169 | struct sk_buff *skb; | |
2170 | int quote, cnt; | |
2171 | ||
2172 | BT_DBG("%s", hdev->name); | |
2173 | ||
52087a79 LAD |
2174 | if (!hci_conn_num(hdev, LE_LINK)) |
2175 | return; | |
2176 | ||
6ed58ec5 VT |
2177 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
2178 | /* LE tx timeout must be longer than maximum | |
2179 | * link supervision timeout (40.9 seconds) */ | |
bae1f5d9 | 2180 | if (!hdev->le_cnt && hdev->le_pkts && |
6ed58ec5 | 2181 | time_after(jiffies, hdev->le_last_tx + HZ * 45)) |
bae1f5d9 | 2182 | hci_link_tx_to(hdev, LE_LINK); |
6ed58ec5 VT |
2183 | } |
2184 | ||
2185 | cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt; | |
2186 | while (cnt && (conn = hci_low_sent(hdev, LE_LINK, "e))) { | |
2187 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
2188 | BT_DBG("skb %p len %d", skb, skb->len); | |
2189 | ||
2190 | hci_send_frame(skb); | |
2191 | hdev->le_last_tx = jiffies; | |
2192 | ||
2193 | cnt--; | |
2194 | conn->sent++; | |
2195 | } | |
2196 | } | |
2197 | if (hdev->le_pkts) | |
2198 | hdev->le_cnt = cnt; | |
2199 | else | |
2200 | hdev->acl_cnt = cnt; | |
2201 | } | |
2202 | ||
1da177e4 LT |
2203 | static void hci_tx_task(unsigned long arg) |
2204 | { | |
2205 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2206 | struct sk_buff *skb; | |
2207 | ||
2208 | read_lock(&hci_task_lock); | |
2209 | ||
6ed58ec5 VT |
2210 | BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt, |
2211 | hdev->sco_cnt, hdev->le_cnt); | |
1da177e4 LT |
2212 | |
2213 | /* Schedule queues and send stuff to HCI driver */ | |
2214 | ||
2215 | hci_sched_acl(hdev); | |
2216 | ||
2217 | hci_sched_sco(hdev); | |
2218 | ||
b6a0dc82 MH |
2219 | hci_sched_esco(hdev); |
2220 | ||
6ed58ec5 VT |
2221 | hci_sched_le(hdev); |
2222 | ||
1da177e4 LT |
2223 | /* Send next queued raw (unknown type) packet */ |
2224 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
2225 | hci_send_frame(skb); | |
2226 | ||
2227 | read_unlock(&hci_task_lock); | |
2228 | } | |
2229 | ||
25985edc | 2230 | /* ----- HCI RX task (incoming data processing) ----- */ |
1da177e4 LT |
2231 | |
2232 | /* ACL data packet */ | |
2233 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
2234 | { | |
2235 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
2236 | struct hci_conn *conn; | |
2237 | __u16 handle, flags; | |
2238 | ||
2239 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
2240 | ||
2241 | handle = __le16_to_cpu(hdr->handle); | |
2242 | flags = hci_flags(handle); | |
2243 | handle = hci_handle(handle); | |
2244 | ||
2245 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
2246 | ||
2247 | hdev->stat.acl_rx++; | |
2248 | ||
2249 | hci_dev_lock(hdev); | |
2250 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
2251 | hci_dev_unlock(hdev); | |
8e87d142 | 2252 | |
1da177e4 LT |
2253 | if (conn) { |
2254 | register struct hci_proto *hp; | |
2255 | ||
14b12d0b | 2256 | hci_conn_enter_active_mode(conn, bt_cb(skb)->force_active); |
04837f64 | 2257 | |
1da177e4 | 2258 | /* Send to upper protocol */ |
70f23020 AE |
2259 | hp = hci_proto[HCI_PROTO_L2CAP]; |
2260 | if (hp && hp->recv_acldata) { | |
1da177e4 LT |
2261 | hp->recv_acldata(conn, skb, flags); |
2262 | return; | |
2263 | } | |
2264 | } else { | |
8e87d142 | 2265 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
2266 | hdev->name, handle); |
2267 | } | |
2268 | ||
2269 | kfree_skb(skb); | |
2270 | } | |
2271 | ||
2272 | /* SCO data packet */ | |
2273 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
2274 | { | |
2275 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
2276 | struct hci_conn *conn; | |
2277 | __u16 handle; | |
2278 | ||
2279 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
2280 | ||
2281 | handle = __le16_to_cpu(hdr->handle); | |
2282 | ||
2283 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
2284 | ||
2285 | hdev->stat.sco_rx++; | |
2286 | ||
2287 | hci_dev_lock(hdev); | |
2288 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
2289 | hci_dev_unlock(hdev); | |
2290 | ||
2291 | if (conn) { | |
2292 | register struct hci_proto *hp; | |
2293 | ||
2294 | /* Send to upper protocol */ | |
70f23020 AE |
2295 | hp = hci_proto[HCI_PROTO_SCO]; |
2296 | if (hp && hp->recv_scodata) { | |
1da177e4 LT |
2297 | hp->recv_scodata(conn, skb); |
2298 | return; | |
2299 | } | |
2300 | } else { | |
8e87d142 | 2301 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
2302 | hdev->name, handle); |
2303 | } | |
2304 | ||
2305 | kfree_skb(skb); | |
2306 | } | |
2307 | ||
6516455d | 2308 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
2309 | { |
2310 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2311 | struct sk_buff *skb; | |
2312 | ||
2313 | BT_DBG("%s", hdev->name); | |
2314 | ||
2315 | read_lock(&hci_task_lock); | |
2316 | ||
2317 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
2318 | if (atomic_read(&hdev->promisc)) { | |
2319 | /* Send copy to the sockets */ | |
eec8d2bc | 2320 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
2321 | } |
2322 | ||
2323 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
2324 | kfree_skb(skb); | |
2325 | continue; | |
2326 | } | |
2327 | ||
2328 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
2329 | /* Don't process data packets in this states. */ | |
0d48d939 | 2330 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
2331 | case HCI_ACLDATA_PKT: |
2332 | case HCI_SCODATA_PKT: | |
2333 | kfree_skb(skb); | |
2334 | continue; | |
3ff50b79 | 2335 | } |
1da177e4 LT |
2336 | } |
2337 | ||
2338 | /* Process frame */ | |
0d48d939 | 2339 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
2340 | case HCI_EVENT_PKT: |
2341 | hci_event_packet(hdev, skb); | |
2342 | break; | |
2343 | ||
2344 | case HCI_ACLDATA_PKT: | |
2345 | BT_DBG("%s ACL data packet", hdev->name); | |
2346 | hci_acldata_packet(hdev, skb); | |
2347 | break; | |
2348 | ||
2349 | case HCI_SCODATA_PKT: | |
2350 | BT_DBG("%s SCO data packet", hdev->name); | |
2351 | hci_scodata_packet(hdev, skb); | |
2352 | break; | |
2353 | ||
2354 | default: | |
2355 | kfree_skb(skb); | |
2356 | break; | |
2357 | } | |
2358 | } | |
2359 | ||
2360 | read_unlock(&hci_task_lock); | |
2361 | } | |
2362 | ||
2363 | static void hci_cmd_task(unsigned long arg) | |
2364 | { | |
2365 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2366 | struct sk_buff *skb; | |
2367 | ||
2368 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
2369 | ||
1da177e4 | 2370 | /* Send queued commands */ |
5a08ecce AE |
2371 | if (atomic_read(&hdev->cmd_cnt)) { |
2372 | skb = skb_dequeue(&hdev->cmd_q); | |
2373 | if (!skb) | |
2374 | return; | |
2375 | ||
7585b97a | 2376 | kfree_skb(hdev->sent_cmd); |
1da177e4 | 2377 | |
70f23020 AE |
2378 | hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC); |
2379 | if (hdev->sent_cmd) { | |
1da177e4 LT |
2380 | atomic_dec(&hdev->cmd_cnt); |
2381 | hci_send_frame(skb); | |
7bdb8a5c SJ |
2382 | if (test_bit(HCI_RESET, &hdev->flags)) |
2383 | del_timer(&hdev->cmd_timer); | |
2384 | else | |
2385 | mod_timer(&hdev->cmd_timer, | |
6bd32326 | 2386 | jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT)); |
1da177e4 LT |
2387 | } else { |
2388 | skb_queue_head(&hdev->cmd_q, skb); | |
c78ae283 | 2389 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
2390 | } |
2391 | } | |
2392 | } |