Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth HCI core. */ | |
26 | ||
82453021 | 27 | #include <linux/jiffies.h> |
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/kmod.h> | |
30 | ||
31 | #include <linux/types.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/kernel.h> | |
1da177e4 LT |
34 | #include <linux/sched.h> |
35 | #include <linux/slab.h> | |
36 | #include <linux/poll.h> | |
37 | #include <linux/fcntl.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/skbuff.h> | |
f48fd9c8 | 40 | #include <linux/workqueue.h> |
1da177e4 LT |
41 | #include <linux/interrupt.h> |
42 | #include <linux/notifier.h> | |
611b30f7 | 43 | #include <linux/rfkill.h> |
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 | ||
07e3b94a AE |
524 | /* Treat all non BR/EDR controllers as raw devices if |
525 | enable_hs is not set */ | |
526 | if (hdev->dev_type != HCI_BREDR && !enable_hs) | |
943da25d MH |
527 | set_bit(HCI_RAW, &hdev->flags); |
528 | ||
1da177e4 LT |
529 | if (hdev->open(hdev)) { |
530 | ret = -EIO; | |
531 | goto done; | |
532 | } | |
533 | ||
534 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
535 | atomic_set(&hdev->cmd_cnt, 1); | |
536 | set_bit(HCI_INIT, &hdev->flags); | |
a5040efa | 537 | hdev->init_last_cmd = 0; |
1da177e4 | 538 | |
04837f64 MH |
539 | ret = __hci_request(hdev, hci_init_req, 0, |
540 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 | 541 | |
eead27da | 542 | if (lmp_host_le_capable(hdev)) |
6ed58ec5 VT |
543 | ret = __hci_request(hdev, hci_le_init_req, 0, |
544 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
545 | ||
1da177e4 LT |
546 | clear_bit(HCI_INIT, &hdev->flags); |
547 | } | |
548 | ||
549 | if (!ret) { | |
550 | hci_dev_hold(hdev); | |
551 | set_bit(HCI_UP, &hdev->flags); | |
552 | hci_notify(hdev, HCI_DEV_UP); | |
56e5cb86 JH |
553 | if (!test_bit(HCI_SETUP, &hdev->flags)) { |
554 | hci_dev_lock_bh(hdev); | |
744cf19e | 555 | mgmt_powered(hdev, 1); |
56e5cb86 JH |
556 | hci_dev_unlock_bh(hdev); |
557 | } | |
8e87d142 | 558 | } else { |
1da177e4 LT |
559 | /* Init failed, cleanup */ |
560 | tasklet_kill(&hdev->rx_task); | |
561 | tasklet_kill(&hdev->tx_task); | |
562 | tasklet_kill(&hdev->cmd_task); | |
563 | ||
564 | skb_queue_purge(&hdev->cmd_q); | |
565 | skb_queue_purge(&hdev->rx_q); | |
566 | ||
567 | if (hdev->flush) | |
568 | hdev->flush(hdev); | |
569 | ||
570 | if (hdev->sent_cmd) { | |
571 | kfree_skb(hdev->sent_cmd); | |
572 | hdev->sent_cmd = NULL; | |
573 | } | |
574 | ||
575 | hdev->close(hdev); | |
576 | hdev->flags = 0; | |
577 | } | |
578 | ||
579 | done: | |
580 | hci_req_unlock(hdev); | |
581 | hci_dev_put(hdev); | |
582 | return ret; | |
583 | } | |
584 | ||
585 | static int hci_dev_do_close(struct hci_dev *hdev) | |
586 | { | |
587 | BT_DBG("%s %p", hdev->name, hdev); | |
588 | ||
589 | hci_req_cancel(hdev, ENODEV); | |
590 | hci_req_lock(hdev); | |
591 | ||
592 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
b79f44c1 | 593 | del_timer_sync(&hdev->cmd_timer); |
1da177e4 LT |
594 | hci_req_unlock(hdev); |
595 | return 0; | |
596 | } | |
597 | ||
598 | /* Kill RX and TX tasks */ | |
599 | tasklet_kill(&hdev->rx_task); | |
600 | tasklet_kill(&hdev->tx_task); | |
601 | ||
16ab91ab | 602 | if (hdev->discov_timeout > 0) { |
e0f9309f | 603 | cancel_delayed_work(&hdev->discov_off); |
16ab91ab JH |
604 | hdev->discov_timeout = 0; |
605 | } | |
606 | ||
3243553f | 607 | if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->flags)) |
e0f9309f | 608 | cancel_delayed_work(&hdev->power_off); |
3243553f | 609 | |
1da177e4 LT |
610 | hci_dev_lock_bh(hdev); |
611 | inquiry_cache_flush(hdev); | |
612 | hci_conn_hash_flush(hdev); | |
613 | hci_dev_unlock_bh(hdev); | |
614 | ||
615 | hci_notify(hdev, HCI_DEV_DOWN); | |
616 | ||
617 | if (hdev->flush) | |
618 | hdev->flush(hdev); | |
619 | ||
620 | /* Reset device */ | |
621 | skb_queue_purge(&hdev->cmd_q); | |
622 | atomic_set(&hdev->cmd_cnt, 1); | |
623 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
624 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 | 625 | __hci_request(hdev, hci_reset_req, 0, |
43611a7b | 626 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
1da177e4 LT |
627 | clear_bit(HCI_INIT, &hdev->flags); |
628 | } | |
629 | ||
630 | /* Kill cmd task */ | |
631 | tasklet_kill(&hdev->cmd_task); | |
632 | ||
633 | /* Drop queues */ | |
634 | skb_queue_purge(&hdev->rx_q); | |
635 | skb_queue_purge(&hdev->cmd_q); | |
636 | skb_queue_purge(&hdev->raw_q); | |
637 | ||
638 | /* Drop last sent command */ | |
639 | if (hdev->sent_cmd) { | |
b79f44c1 | 640 | del_timer_sync(&hdev->cmd_timer); |
1da177e4 LT |
641 | kfree_skb(hdev->sent_cmd); |
642 | hdev->sent_cmd = NULL; | |
643 | } | |
644 | ||
645 | /* After this point our queues are empty | |
646 | * and no tasks are scheduled. */ | |
647 | hdev->close(hdev); | |
648 | ||
56e5cb86 | 649 | hci_dev_lock_bh(hdev); |
744cf19e | 650 | mgmt_powered(hdev, 0); |
56e5cb86 | 651 | hci_dev_unlock_bh(hdev); |
5add6af8 | 652 | |
1da177e4 LT |
653 | /* Clear flags */ |
654 | hdev->flags = 0; | |
655 | ||
656 | hci_req_unlock(hdev); | |
657 | ||
658 | hci_dev_put(hdev); | |
659 | return 0; | |
660 | } | |
661 | ||
662 | int hci_dev_close(__u16 dev) | |
663 | { | |
664 | struct hci_dev *hdev; | |
665 | int err; | |
666 | ||
70f23020 AE |
667 | hdev = hci_dev_get(dev); |
668 | if (!hdev) | |
1da177e4 LT |
669 | return -ENODEV; |
670 | err = hci_dev_do_close(hdev); | |
671 | hci_dev_put(hdev); | |
672 | return err; | |
673 | } | |
674 | ||
675 | int hci_dev_reset(__u16 dev) | |
676 | { | |
677 | struct hci_dev *hdev; | |
678 | int ret = 0; | |
679 | ||
70f23020 AE |
680 | hdev = hci_dev_get(dev); |
681 | if (!hdev) | |
1da177e4 LT |
682 | return -ENODEV; |
683 | ||
684 | hci_req_lock(hdev); | |
685 | tasklet_disable(&hdev->tx_task); | |
686 | ||
687 | if (!test_bit(HCI_UP, &hdev->flags)) | |
688 | goto done; | |
689 | ||
690 | /* Drop queues */ | |
691 | skb_queue_purge(&hdev->rx_q); | |
692 | skb_queue_purge(&hdev->cmd_q); | |
693 | ||
694 | hci_dev_lock_bh(hdev); | |
695 | inquiry_cache_flush(hdev); | |
696 | hci_conn_hash_flush(hdev); | |
697 | hci_dev_unlock_bh(hdev); | |
698 | ||
699 | if (hdev->flush) | |
700 | hdev->flush(hdev); | |
701 | ||
8e87d142 | 702 | atomic_set(&hdev->cmd_cnt, 1); |
6ed58ec5 | 703 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0; |
1da177e4 LT |
704 | |
705 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
706 | ret = __hci_request(hdev, hci_reset_req, 0, |
707 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
708 | |
709 | done: | |
710 | tasklet_enable(&hdev->tx_task); | |
711 | hci_req_unlock(hdev); | |
712 | hci_dev_put(hdev); | |
713 | return ret; | |
714 | } | |
715 | ||
716 | int hci_dev_reset_stat(__u16 dev) | |
717 | { | |
718 | struct hci_dev *hdev; | |
719 | int ret = 0; | |
720 | ||
70f23020 AE |
721 | hdev = hci_dev_get(dev); |
722 | if (!hdev) | |
1da177e4 LT |
723 | return -ENODEV; |
724 | ||
725 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
726 | ||
727 | hci_dev_put(hdev); | |
728 | ||
729 | return ret; | |
730 | } | |
731 | ||
732 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
733 | { | |
734 | struct hci_dev *hdev; | |
735 | struct hci_dev_req dr; | |
736 | int err = 0; | |
737 | ||
738 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
739 | return -EFAULT; | |
740 | ||
70f23020 AE |
741 | hdev = hci_dev_get(dr.dev_id); |
742 | if (!hdev) | |
1da177e4 LT |
743 | return -ENODEV; |
744 | ||
745 | switch (cmd) { | |
746 | case HCISETAUTH: | |
04837f64 MH |
747 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
748 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
749 | break; |
750 | ||
751 | case HCISETENCRYPT: | |
752 | if (!lmp_encrypt_capable(hdev)) { | |
753 | err = -EOPNOTSUPP; | |
754 | break; | |
755 | } | |
756 | ||
757 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
758 | /* Auth must be enabled first */ | |
04837f64 MH |
759 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
760 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
761 | if (err) |
762 | break; | |
763 | } | |
764 | ||
04837f64 MH |
765 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
766 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
767 | break; |
768 | ||
769 | case HCISETSCAN: | |
04837f64 MH |
770 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
771 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
772 | break; |
773 | ||
1da177e4 | 774 | case HCISETLINKPOL: |
e4e8e37c MH |
775 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
776 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
777 | break; |
778 | ||
779 | case HCISETLINKMODE: | |
e4e8e37c MH |
780 | hdev->link_mode = ((__u16) dr.dev_opt) & |
781 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
782 | break; | |
783 | ||
784 | case HCISETPTYPE: | |
785 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
786 | break; |
787 | ||
788 | case HCISETACLMTU: | |
e4e8e37c MH |
789 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
790 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
791 | break; |
792 | ||
793 | case HCISETSCOMTU: | |
e4e8e37c MH |
794 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
795 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
796 | break; |
797 | ||
798 | default: | |
799 | err = -EINVAL; | |
800 | break; | |
801 | } | |
e4e8e37c | 802 | |
1da177e4 LT |
803 | hci_dev_put(hdev); |
804 | return err; | |
805 | } | |
806 | ||
807 | int hci_get_dev_list(void __user *arg) | |
808 | { | |
8035ded4 | 809 | struct hci_dev *hdev; |
1da177e4 LT |
810 | struct hci_dev_list_req *dl; |
811 | struct hci_dev_req *dr; | |
1da177e4 LT |
812 | int n = 0, size, err; |
813 | __u16 dev_num; | |
814 | ||
815 | if (get_user(dev_num, (__u16 __user *) arg)) | |
816 | return -EFAULT; | |
817 | ||
818 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
819 | return -EINVAL; | |
820 | ||
821 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
822 | ||
70f23020 AE |
823 | dl = kzalloc(size, GFP_KERNEL); |
824 | if (!dl) | |
1da177e4 LT |
825 | return -ENOMEM; |
826 | ||
827 | dr = dl->dev_req; | |
828 | ||
829 | read_lock_bh(&hci_dev_list_lock); | |
8035ded4 | 830 | list_for_each_entry(hdev, &hci_dev_list, list) { |
3243553f | 831 | if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->flags)) |
e0f9309f | 832 | cancel_delayed_work(&hdev->power_off); |
c542a06c JH |
833 | |
834 | if (!test_bit(HCI_MGMT, &hdev->flags)) | |
835 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
836 | ||
1da177e4 LT |
837 | (dr + n)->dev_id = hdev->id; |
838 | (dr + n)->dev_opt = hdev->flags; | |
c542a06c | 839 | |
1da177e4 LT |
840 | if (++n >= dev_num) |
841 | break; | |
842 | } | |
843 | read_unlock_bh(&hci_dev_list_lock); | |
844 | ||
845 | dl->dev_num = n; | |
846 | size = sizeof(*dl) + n * sizeof(*dr); | |
847 | ||
848 | err = copy_to_user(arg, dl, size); | |
849 | kfree(dl); | |
850 | ||
851 | return err ? -EFAULT : 0; | |
852 | } | |
853 | ||
854 | int hci_get_dev_info(void __user *arg) | |
855 | { | |
856 | struct hci_dev *hdev; | |
857 | struct hci_dev_info di; | |
858 | int err = 0; | |
859 | ||
860 | if (copy_from_user(&di, arg, sizeof(di))) | |
861 | return -EFAULT; | |
862 | ||
70f23020 AE |
863 | hdev = hci_dev_get(di.dev_id); |
864 | if (!hdev) | |
1da177e4 LT |
865 | return -ENODEV; |
866 | ||
3243553f JH |
867 | if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->flags)) |
868 | cancel_delayed_work_sync(&hdev->power_off); | |
ab81cbf9 | 869 | |
c542a06c JH |
870 | if (!test_bit(HCI_MGMT, &hdev->flags)) |
871 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
872 | ||
1da177e4 LT |
873 | strcpy(di.name, hdev->name); |
874 | di.bdaddr = hdev->bdaddr; | |
943da25d | 875 | di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4); |
1da177e4 LT |
876 | di.flags = hdev->flags; |
877 | di.pkt_type = hdev->pkt_type; | |
878 | di.acl_mtu = hdev->acl_mtu; | |
879 | di.acl_pkts = hdev->acl_pkts; | |
880 | di.sco_mtu = hdev->sco_mtu; | |
881 | di.sco_pkts = hdev->sco_pkts; | |
882 | di.link_policy = hdev->link_policy; | |
883 | di.link_mode = hdev->link_mode; | |
884 | ||
885 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
886 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
887 | ||
888 | if (copy_to_user(arg, &di, sizeof(di))) | |
889 | err = -EFAULT; | |
890 | ||
891 | hci_dev_put(hdev); | |
892 | ||
893 | return err; | |
894 | } | |
895 | ||
896 | /* ---- Interface to HCI drivers ---- */ | |
897 | ||
611b30f7 MH |
898 | static int hci_rfkill_set_block(void *data, bool blocked) |
899 | { | |
900 | struct hci_dev *hdev = data; | |
901 | ||
902 | BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); | |
903 | ||
904 | if (!blocked) | |
905 | return 0; | |
906 | ||
907 | hci_dev_do_close(hdev); | |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
912 | static const struct rfkill_ops hci_rfkill_ops = { | |
913 | .set_block = hci_rfkill_set_block, | |
914 | }; | |
915 | ||
1da177e4 LT |
916 | /* Alloc HCI device */ |
917 | struct hci_dev *hci_alloc_dev(void) | |
918 | { | |
919 | struct hci_dev *hdev; | |
920 | ||
25ea6db0 | 921 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
922 | if (!hdev) |
923 | return NULL; | |
924 | ||
0ac7e700 | 925 | hci_init_sysfs(hdev); |
1da177e4 LT |
926 | skb_queue_head_init(&hdev->driver_init); |
927 | ||
928 | return hdev; | |
929 | } | |
930 | EXPORT_SYMBOL(hci_alloc_dev); | |
931 | ||
932 | /* Free HCI device */ | |
933 | void hci_free_dev(struct hci_dev *hdev) | |
934 | { | |
935 | skb_queue_purge(&hdev->driver_init); | |
936 | ||
a91f2e39 MH |
937 | /* will free via device release */ |
938 | put_device(&hdev->dev); | |
1da177e4 LT |
939 | } |
940 | EXPORT_SYMBOL(hci_free_dev); | |
941 | ||
ab81cbf9 JH |
942 | static void hci_power_on(struct work_struct *work) |
943 | { | |
944 | struct hci_dev *hdev = container_of(work, struct hci_dev, power_on); | |
945 | ||
946 | BT_DBG("%s", hdev->name); | |
947 | ||
948 | if (hci_dev_open(hdev->id) < 0) | |
949 | return; | |
950 | ||
951 | if (test_bit(HCI_AUTO_OFF, &hdev->flags)) | |
3243553f JH |
952 | queue_delayed_work(hdev->workqueue, &hdev->power_off, |
953 | msecs_to_jiffies(AUTO_OFF_TIMEOUT)); | |
ab81cbf9 JH |
954 | |
955 | if (test_and_clear_bit(HCI_SETUP, &hdev->flags)) | |
744cf19e | 956 | mgmt_index_added(hdev); |
ab81cbf9 JH |
957 | } |
958 | ||
959 | static void hci_power_off(struct work_struct *work) | |
960 | { | |
3243553f JH |
961 | struct hci_dev *hdev = container_of(work, struct hci_dev, |
962 | power_off.work); | |
ab81cbf9 JH |
963 | |
964 | BT_DBG("%s", hdev->name); | |
965 | ||
966 | clear_bit(HCI_AUTO_OFF, &hdev->flags); | |
967 | ||
3243553f | 968 | hci_dev_close(hdev->id); |
ab81cbf9 JH |
969 | } |
970 | ||
16ab91ab JH |
971 | static void hci_discov_off(struct work_struct *work) |
972 | { | |
973 | struct hci_dev *hdev; | |
974 | u8 scan = SCAN_PAGE; | |
975 | ||
976 | hdev = container_of(work, struct hci_dev, discov_off.work); | |
977 | ||
978 | BT_DBG("%s", hdev->name); | |
979 | ||
980 | hci_dev_lock_bh(hdev); | |
981 | ||
982 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan); | |
983 | ||
984 | hdev->discov_timeout = 0; | |
985 | ||
986 | hci_dev_unlock_bh(hdev); | |
987 | } | |
988 | ||
2aeb9a1a JH |
989 | int hci_uuids_clear(struct hci_dev *hdev) |
990 | { | |
991 | struct list_head *p, *n; | |
992 | ||
993 | list_for_each_safe(p, n, &hdev->uuids) { | |
994 | struct bt_uuid *uuid; | |
995 | ||
996 | uuid = list_entry(p, struct bt_uuid, list); | |
997 | ||
998 | list_del(p); | |
999 | kfree(uuid); | |
1000 | } | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | ||
55ed8ca1 JH |
1005 | int hci_link_keys_clear(struct hci_dev *hdev) |
1006 | { | |
1007 | struct list_head *p, *n; | |
1008 | ||
1009 | list_for_each_safe(p, n, &hdev->link_keys) { | |
1010 | struct link_key *key; | |
1011 | ||
1012 | key = list_entry(p, struct link_key, list); | |
1013 | ||
1014 | list_del(p); | |
1015 | kfree(key); | |
1016 | } | |
1017 | ||
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1022 | { | |
8035ded4 | 1023 | struct link_key *k; |
55ed8ca1 | 1024 | |
8035ded4 | 1025 | list_for_each_entry(k, &hdev->link_keys, list) |
55ed8ca1 JH |
1026 | if (bacmp(bdaddr, &k->bdaddr) == 0) |
1027 | return k; | |
55ed8ca1 JH |
1028 | |
1029 | return NULL; | |
1030 | } | |
1031 | ||
d25e28ab JH |
1032 | static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn, |
1033 | u8 key_type, u8 old_key_type) | |
1034 | { | |
1035 | /* Legacy key */ | |
1036 | if (key_type < 0x03) | |
1037 | return 1; | |
1038 | ||
1039 | /* Debug keys are insecure so don't store them persistently */ | |
1040 | if (key_type == HCI_LK_DEBUG_COMBINATION) | |
1041 | return 0; | |
1042 | ||
1043 | /* Changed combination key and there's no previous one */ | |
1044 | if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff) | |
1045 | return 0; | |
1046 | ||
1047 | /* Security mode 3 case */ | |
1048 | if (!conn) | |
1049 | return 1; | |
1050 | ||
1051 | /* Neither local nor remote side had no-bonding as requirement */ | |
1052 | if (conn->auth_type > 0x01 && conn->remote_auth > 0x01) | |
1053 | return 1; | |
1054 | ||
1055 | /* Local side had dedicated bonding as requirement */ | |
1056 | if (conn->auth_type == 0x02 || conn->auth_type == 0x03) | |
1057 | return 1; | |
1058 | ||
1059 | /* Remote side had dedicated bonding as requirement */ | |
1060 | if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03) | |
1061 | return 1; | |
1062 | ||
1063 | /* If none of the above criteria match, then don't store the key | |
1064 | * persistently */ | |
1065 | return 0; | |
1066 | } | |
1067 | ||
75d262c2 VCG |
1068 | struct link_key *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8]) |
1069 | { | |
1070 | struct link_key *k; | |
1071 | ||
1072 | list_for_each_entry(k, &hdev->link_keys, list) { | |
1073 | struct key_master_id *id; | |
1074 | ||
1075 | if (k->type != HCI_LK_SMP_LTK) | |
1076 | continue; | |
1077 | ||
1078 | if (k->dlen != sizeof(*id)) | |
1079 | continue; | |
1080 | ||
1081 | id = (void *) &k->data; | |
1082 | if (id->ediv == ediv && | |
1083 | (memcmp(rand, id->rand, sizeof(id->rand)) == 0)) | |
1084 | return k; | |
1085 | } | |
1086 | ||
1087 | return NULL; | |
1088 | } | |
1089 | EXPORT_SYMBOL(hci_find_ltk); | |
1090 | ||
1091 | struct link_key *hci_find_link_key_type(struct hci_dev *hdev, | |
1092 | bdaddr_t *bdaddr, u8 type) | |
1093 | { | |
1094 | struct link_key *k; | |
1095 | ||
1096 | list_for_each_entry(k, &hdev->link_keys, list) | |
1097 | if (k->type == type && bacmp(bdaddr, &k->bdaddr) == 0) | |
1098 | return k; | |
1099 | ||
1100 | return NULL; | |
1101 | } | |
1102 | EXPORT_SYMBOL(hci_find_link_key_type); | |
1103 | ||
d25e28ab JH |
1104 | int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key, |
1105 | bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len) | |
55ed8ca1 JH |
1106 | { |
1107 | struct link_key *key, *old_key; | |
4df378a1 | 1108 | u8 old_key_type, persistent; |
55ed8ca1 JH |
1109 | |
1110 | old_key = hci_find_link_key(hdev, bdaddr); | |
1111 | if (old_key) { | |
1112 | old_key_type = old_key->type; | |
1113 | key = old_key; | |
1114 | } else { | |
12adcf3a | 1115 | old_key_type = conn ? conn->key_type : 0xff; |
55ed8ca1 JH |
1116 | key = kzalloc(sizeof(*key), GFP_ATOMIC); |
1117 | if (!key) | |
1118 | return -ENOMEM; | |
1119 | list_add(&key->list, &hdev->link_keys); | |
1120 | } | |
1121 | ||
1122 | BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type); | |
1123 | ||
d25e28ab JH |
1124 | /* Some buggy controller combinations generate a changed |
1125 | * combination key for legacy pairing even when there's no | |
1126 | * previous key */ | |
1127 | if (type == HCI_LK_CHANGED_COMBINATION && | |
1128 | (!conn || conn->remote_auth == 0xff) && | |
655fe6ec | 1129 | old_key_type == 0xff) { |
d25e28ab | 1130 | type = HCI_LK_COMBINATION; |
655fe6ec JH |
1131 | if (conn) |
1132 | conn->key_type = type; | |
1133 | } | |
d25e28ab | 1134 | |
55ed8ca1 JH |
1135 | bacpy(&key->bdaddr, bdaddr); |
1136 | memcpy(key->val, val, 16); | |
55ed8ca1 JH |
1137 | key->pin_len = pin_len; |
1138 | ||
b6020ba0 | 1139 | if (type == HCI_LK_CHANGED_COMBINATION) |
55ed8ca1 | 1140 | key->type = old_key_type; |
4748fed2 JH |
1141 | else |
1142 | key->type = type; | |
1143 | ||
4df378a1 JH |
1144 | if (!new_key) |
1145 | return 0; | |
1146 | ||
1147 | persistent = hci_persistent_key(hdev, conn, type, old_key_type); | |
1148 | ||
744cf19e | 1149 | mgmt_new_link_key(hdev, key, persistent); |
4df378a1 JH |
1150 | |
1151 | if (!persistent) { | |
1152 | list_del(&key->list); | |
1153 | kfree(key); | |
1154 | } | |
55ed8ca1 JH |
1155 | |
1156 | return 0; | |
1157 | } | |
1158 | ||
75d262c2 | 1159 | int hci_add_ltk(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr, |
726b4ffc | 1160 | u8 key_size, __le16 ediv, u8 rand[8], u8 ltk[16]) |
75d262c2 VCG |
1161 | { |
1162 | struct link_key *key, *old_key; | |
1163 | struct key_master_id *id; | |
1164 | u8 old_key_type; | |
1165 | ||
1166 | BT_DBG("%s addr %s", hdev->name, batostr(bdaddr)); | |
1167 | ||
1168 | old_key = hci_find_link_key_type(hdev, bdaddr, HCI_LK_SMP_LTK); | |
1169 | if (old_key) { | |
1170 | key = old_key; | |
1171 | old_key_type = old_key->type; | |
1172 | } else { | |
1173 | key = kzalloc(sizeof(*key) + sizeof(*id), GFP_ATOMIC); | |
1174 | if (!key) | |
1175 | return -ENOMEM; | |
1176 | list_add(&key->list, &hdev->link_keys); | |
1177 | old_key_type = 0xff; | |
1178 | } | |
1179 | ||
1180 | key->dlen = sizeof(*id); | |
1181 | ||
1182 | bacpy(&key->bdaddr, bdaddr); | |
1183 | memcpy(key->val, ltk, sizeof(key->val)); | |
1184 | key->type = HCI_LK_SMP_LTK; | |
726b4ffc | 1185 | key->pin_len = key_size; |
75d262c2 VCG |
1186 | |
1187 | id = (void *) &key->data; | |
1188 | id->ediv = ediv; | |
1189 | memcpy(id->rand, rand, sizeof(id->rand)); | |
1190 | ||
1191 | if (new_key) | |
744cf19e | 1192 | mgmt_new_link_key(hdev, key, old_key_type); |
75d262c2 VCG |
1193 | |
1194 | return 0; | |
1195 | } | |
1196 | ||
55ed8ca1 JH |
1197 | int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1198 | { | |
1199 | struct link_key *key; | |
1200 | ||
1201 | key = hci_find_link_key(hdev, bdaddr); | |
1202 | if (!key) | |
1203 | return -ENOENT; | |
1204 | ||
1205 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1206 | ||
1207 | list_del(&key->list); | |
1208 | kfree(key); | |
1209 | ||
1210 | return 0; | |
1211 | } | |
1212 | ||
6bd32326 VT |
1213 | /* HCI command timer function */ |
1214 | static void hci_cmd_timer(unsigned long arg) | |
1215 | { | |
1216 | struct hci_dev *hdev = (void *) arg; | |
1217 | ||
1218 | BT_ERR("%s command tx timeout", hdev->name); | |
1219 | atomic_set(&hdev->cmd_cnt, 1); | |
1220 | tasklet_schedule(&hdev->cmd_task); | |
1221 | } | |
1222 | ||
2763eda6 SJ |
1223 | struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev, |
1224 | bdaddr_t *bdaddr) | |
1225 | { | |
1226 | struct oob_data *data; | |
1227 | ||
1228 | list_for_each_entry(data, &hdev->remote_oob_data, list) | |
1229 | if (bacmp(bdaddr, &data->bdaddr) == 0) | |
1230 | return data; | |
1231 | ||
1232 | return NULL; | |
1233 | } | |
1234 | ||
1235 | int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1236 | { | |
1237 | struct oob_data *data; | |
1238 | ||
1239 | data = hci_find_remote_oob_data(hdev, bdaddr); | |
1240 | if (!data) | |
1241 | return -ENOENT; | |
1242 | ||
1243 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1244 | ||
1245 | list_del(&data->list); | |
1246 | kfree(data); | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | int hci_remote_oob_data_clear(struct hci_dev *hdev) | |
1252 | { | |
1253 | struct oob_data *data, *n; | |
1254 | ||
1255 | list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) { | |
1256 | list_del(&data->list); | |
1257 | kfree(data); | |
1258 | } | |
1259 | ||
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash, | |
1264 | u8 *randomizer) | |
1265 | { | |
1266 | struct oob_data *data; | |
1267 | ||
1268 | data = hci_find_remote_oob_data(hdev, bdaddr); | |
1269 | ||
1270 | if (!data) { | |
1271 | data = kmalloc(sizeof(*data), GFP_ATOMIC); | |
1272 | if (!data) | |
1273 | return -ENOMEM; | |
1274 | ||
1275 | bacpy(&data->bdaddr, bdaddr); | |
1276 | list_add(&data->list, &hdev->remote_oob_data); | |
1277 | } | |
1278 | ||
1279 | memcpy(data->hash, hash, sizeof(data->hash)); | |
1280 | memcpy(data->randomizer, randomizer, sizeof(data->randomizer)); | |
1281 | ||
1282 | BT_DBG("%s for %s", hdev->name, batostr(bdaddr)); | |
1283 | ||
1284 | return 0; | |
1285 | } | |
1286 | ||
b2a66aad AJ |
1287 | struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, |
1288 | bdaddr_t *bdaddr) | |
1289 | { | |
8035ded4 | 1290 | struct bdaddr_list *b; |
b2a66aad | 1291 | |
8035ded4 | 1292 | list_for_each_entry(b, &hdev->blacklist, list) |
b2a66aad AJ |
1293 | if (bacmp(bdaddr, &b->bdaddr) == 0) |
1294 | return b; | |
b2a66aad AJ |
1295 | |
1296 | return NULL; | |
1297 | } | |
1298 | ||
1299 | int hci_blacklist_clear(struct hci_dev *hdev) | |
1300 | { | |
1301 | struct list_head *p, *n; | |
1302 | ||
1303 | list_for_each_safe(p, n, &hdev->blacklist) { | |
1304 | struct bdaddr_list *b; | |
1305 | ||
1306 | b = list_entry(p, struct bdaddr_list, list); | |
1307 | ||
1308 | list_del(p); | |
1309 | kfree(b); | |
1310 | } | |
1311 | ||
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1316 | { | |
1317 | struct bdaddr_list *entry; | |
b2a66aad AJ |
1318 | |
1319 | if (bacmp(bdaddr, BDADDR_ANY) == 0) | |
1320 | return -EBADF; | |
1321 | ||
5e762444 AJ |
1322 | if (hci_blacklist_lookup(hdev, bdaddr)) |
1323 | return -EEXIST; | |
b2a66aad AJ |
1324 | |
1325 | entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL); | |
5e762444 AJ |
1326 | if (!entry) |
1327 | return -ENOMEM; | |
b2a66aad AJ |
1328 | |
1329 | bacpy(&entry->bdaddr, bdaddr); | |
1330 | ||
1331 | list_add(&entry->list, &hdev->blacklist); | |
1332 | ||
744cf19e | 1333 | return mgmt_device_blocked(hdev, bdaddr); |
b2a66aad AJ |
1334 | } |
1335 | ||
1336 | int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1337 | { | |
1338 | struct bdaddr_list *entry; | |
b2a66aad | 1339 | |
1ec918ce | 1340 | if (bacmp(bdaddr, BDADDR_ANY) == 0) |
5e762444 | 1341 | return hci_blacklist_clear(hdev); |
b2a66aad AJ |
1342 | |
1343 | entry = hci_blacklist_lookup(hdev, bdaddr); | |
1ec918ce | 1344 | if (!entry) |
5e762444 | 1345 | return -ENOENT; |
b2a66aad AJ |
1346 | |
1347 | list_del(&entry->list); | |
1348 | kfree(entry); | |
1349 | ||
744cf19e | 1350 | return mgmt_device_unblocked(hdev, bdaddr); |
b2a66aad AJ |
1351 | } |
1352 | ||
35815085 AG |
1353 | static void hci_clear_adv_cache(unsigned long arg) |
1354 | { | |
1355 | struct hci_dev *hdev = (void *) arg; | |
1356 | ||
1357 | hci_dev_lock(hdev); | |
1358 | ||
1359 | hci_adv_entries_clear(hdev); | |
1360 | ||
1361 | hci_dev_unlock(hdev); | |
1362 | } | |
1363 | ||
76c8686f AG |
1364 | int hci_adv_entries_clear(struct hci_dev *hdev) |
1365 | { | |
1366 | struct adv_entry *entry, *tmp; | |
1367 | ||
1368 | list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) { | |
1369 | list_del(&entry->list); | |
1370 | kfree(entry); | |
1371 | } | |
1372 | ||
1373 | BT_DBG("%s adv cache cleared", hdev->name); | |
1374 | ||
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1379 | { | |
1380 | struct adv_entry *entry; | |
1381 | ||
1382 | list_for_each_entry(entry, &hdev->adv_entries, list) | |
1383 | if (bacmp(bdaddr, &entry->bdaddr) == 0) | |
1384 | return entry; | |
1385 | ||
1386 | return NULL; | |
1387 | } | |
1388 | ||
1389 | static inline int is_connectable_adv(u8 evt_type) | |
1390 | { | |
1391 | if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND) | |
1392 | return 1; | |
1393 | ||
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | int hci_add_adv_entry(struct hci_dev *hdev, | |
1398 | struct hci_ev_le_advertising_info *ev) | |
1399 | { | |
1400 | struct adv_entry *entry; | |
1401 | ||
1402 | if (!is_connectable_adv(ev->evt_type)) | |
1403 | return -EINVAL; | |
1404 | ||
1405 | /* Only new entries should be added to adv_entries. So, if | |
1406 | * bdaddr was found, don't add it. */ | |
1407 | if (hci_find_adv_entry(hdev, &ev->bdaddr)) | |
1408 | return 0; | |
1409 | ||
1410 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); | |
1411 | if (!entry) | |
1412 | return -ENOMEM; | |
1413 | ||
1414 | bacpy(&entry->bdaddr, &ev->bdaddr); | |
1415 | entry->bdaddr_type = ev->bdaddr_type; | |
1416 | ||
1417 | list_add(&entry->list, &hdev->adv_entries); | |
1418 | ||
1419 | BT_DBG("%s adv entry added: address %s type %u", hdev->name, | |
1420 | batostr(&entry->bdaddr), entry->bdaddr_type); | |
1421 | ||
1422 | return 0; | |
1423 | } | |
1424 | ||
1da177e4 LT |
1425 | /* Register HCI device */ |
1426 | int hci_register_dev(struct hci_dev *hdev) | |
1427 | { | |
1428 | struct list_head *head = &hci_dev_list, *p; | |
08add513 | 1429 | int i, id, error; |
1da177e4 | 1430 | |
c13854ce MH |
1431 | BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name, |
1432 | hdev->bus, hdev->owner); | |
1da177e4 LT |
1433 | |
1434 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
1435 | return -EINVAL; | |
1436 | ||
08add513 MM |
1437 | /* Do not allow HCI_AMP devices to register at index 0, |
1438 | * so the index can be used as the AMP controller ID. | |
1439 | */ | |
1440 | id = (hdev->dev_type == HCI_BREDR) ? 0 : 1; | |
1441 | ||
1da177e4 LT |
1442 | write_lock_bh(&hci_dev_list_lock); |
1443 | ||
1444 | /* Find first available device id */ | |
1445 | list_for_each(p, &hci_dev_list) { | |
1446 | if (list_entry(p, struct hci_dev, list)->id != id) | |
1447 | break; | |
1448 | head = p; id++; | |
1449 | } | |
8e87d142 | 1450 | |
1da177e4 LT |
1451 | sprintf(hdev->name, "hci%d", id); |
1452 | hdev->id = id; | |
1453 | list_add(&hdev->list, head); | |
1454 | ||
1455 | atomic_set(&hdev->refcnt, 1); | |
1456 | spin_lock_init(&hdev->lock); | |
1457 | ||
1458 | hdev->flags = 0; | |
1459 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 1460 | hdev->esco_type = (ESCO_HV1); |
1da177e4 | 1461 | hdev->link_mode = (HCI_LM_ACCEPT); |
17fa4b9d | 1462 | hdev->io_capability = 0x03; /* No Input No Output */ |
1da177e4 | 1463 | |
04837f64 MH |
1464 | hdev->idle_timeout = 0; |
1465 | hdev->sniff_max_interval = 800; | |
1466 | hdev->sniff_min_interval = 80; | |
1467 | ||
70f23020 | 1468 | tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev); |
1da177e4 LT |
1469 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); |
1470 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
1471 | ||
1472 | skb_queue_head_init(&hdev->rx_q); | |
1473 | skb_queue_head_init(&hdev->cmd_q); | |
1474 | skb_queue_head_init(&hdev->raw_q); | |
1475 | ||
6bd32326 VT |
1476 | setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev); |
1477 | ||
cd4c5391 | 1478 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1479 | hdev->reassembly[i] = NULL; |
1480 | ||
1da177e4 | 1481 | init_waitqueue_head(&hdev->req_wait_q); |
a6a67efd | 1482 | mutex_init(&hdev->req_lock); |
1da177e4 LT |
1483 | |
1484 | inquiry_cache_init(hdev); | |
1485 | ||
1486 | hci_conn_hash_init(hdev); | |
1487 | ||
2e58ef3e JH |
1488 | INIT_LIST_HEAD(&hdev->mgmt_pending); |
1489 | ||
ea4bd8ba | 1490 | INIT_LIST_HEAD(&hdev->blacklist); |
f0358568 | 1491 | |
2aeb9a1a JH |
1492 | INIT_LIST_HEAD(&hdev->uuids); |
1493 | ||
55ed8ca1 JH |
1494 | INIT_LIST_HEAD(&hdev->link_keys); |
1495 | ||
2763eda6 SJ |
1496 | INIT_LIST_HEAD(&hdev->remote_oob_data); |
1497 | ||
76c8686f | 1498 | INIT_LIST_HEAD(&hdev->adv_entries); |
35815085 AG |
1499 | setup_timer(&hdev->adv_timer, hci_clear_adv_cache, |
1500 | (unsigned long) hdev); | |
76c8686f | 1501 | |
ab81cbf9 | 1502 | INIT_WORK(&hdev->power_on, hci_power_on); |
3243553f | 1503 | INIT_DELAYED_WORK(&hdev->power_off, hci_power_off); |
ab81cbf9 | 1504 | |
16ab91ab JH |
1505 | INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off); |
1506 | ||
1da177e4 LT |
1507 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
1508 | ||
1509 | atomic_set(&hdev->promisc, 0); | |
1510 | ||
1511 | write_unlock_bh(&hci_dev_list_lock); | |
1512 | ||
f48fd9c8 | 1513 | hdev->workqueue = create_singlethread_workqueue(hdev->name); |
33ca954d DH |
1514 | if (!hdev->workqueue) { |
1515 | error = -ENOMEM; | |
1516 | goto err; | |
1517 | } | |
f48fd9c8 | 1518 | |
33ca954d DH |
1519 | error = hci_add_sysfs(hdev); |
1520 | if (error < 0) | |
1521 | goto err_wqueue; | |
1da177e4 | 1522 | |
611b30f7 MH |
1523 | hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
1524 | RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev); | |
1525 | if (hdev->rfkill) { | |
1526 | if (rfkill_register(hdev->rfkill) < 0) { | |
1527 | rfkill_destroy(hdev->rfkill); | |
1528 | hdev->rfkill = NULL; | |
1529 | } | |
1530 | } | |
1531 | ||
ab81cbf9 JH |
1532 | set_bit(HCI_AUTO_OFF, &hdev->flags); |
1533 | set_bit(HCI_SETUP, &hdev->flags); | |
1534 | queue_work(hdev->workqueue, &hdev->power_on); | |
1535 | ||
1da177e4 LT |
1536 | hci_notify(hdev, HCI_DEV_REG); |
1537 | ||
1538 | return id; | |
f48fd9c8 | 1539 | |
33ca954d DH |
1540 | err_wqueue: |
1541 | destroy_workqueue(hdev->workqueue); | |
1542 | err: | |
f48fd9c8 MH |
1543 | write_lock_bh(&hci_dev_list_lock); |
1544 | list_del(&hdev->list); | |
1545 | write_unlock_bh(&hci_dev_list_lock); | |
1546 | ||
33ca954d | 1547 | return error; |
1da177e4 LT |
1548 | } |
1549 | EXPORT_SYMBOL(hci_register_dev); | |
1550 | ||
1551 | /* Unregister HCI device */ | |
59735631 | 1552 | void hci_unregister_dev(struct hci_dev *hdev) |
1da177e4 | 1553 | { |
ef222013 MH |
1554 | int i; |
1555 | ||
c13854ce | 1556 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
1da177e4 | 1557 | |
1da177e4 LT |
1558 | write_lock_bh(&hci_dev_list_lock); |
1559 | list_del(&hdev->list); | |
1560 | write_unlock_bh(&hci_dev_list_lock); | |
1561 | ||
1562 | hci_dev_do_close(hdev); | |
1563 | ||
cd4c5391 | 1564 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1565 | kfree_skb(hdev->reassembly[i]); |
1566 | ||
ab81cbf9 | 1567 | if (!test_bit(HCI_INIT, &hdev->flags) && |
56e5cb86 JH |
1568 | !test_bit(HCI_SETUP, &hdev->flags)) { |
1569 | hci_dev_lock_bh(hdev); | |
744cf19e | 1570 | mgmt_index_removed(hdev); |
56e5cb86 JH |
1571 | hci_dev_unlock_bh(hdev); |
1572 | } | |
ab81cbf9 | 1573 | |
2e58ef3e JH |
1574 | /* mgmt_index_removed should take care of emptying the |
1575 | * pending list */ | |
1576 | BUG_ON(!list_empty(&hdev->mgmt_pending)); | |
1577 | ||
1da177e4 LT |
1578 | hci_notify(hdev, HCI_DEV_UNREG); |
1579 | ||
611b30f7 MH |
1580 | if (hdev->rfkill) { |
1581 | rfkill_unregister(hdev->rfkill); | |
1582 | rfkill_destroy(hdev->rfkill); | |
1583 | } | |
1584 | ||
ce242970 | 1585 | hci_del_sysfs(hdev); |
147e2d59 | 1586 | |
35815085 | 1587 | del_timer(&hdev->adv_timer); |
c6f3c5f7 | 1588 | |
f48fd9c8 MH |
1589 | destroy_workqueue(hdev->workqueue); |
1590 | ||
e2e0cacb JH |
1591 | hci_dev_lock_bh(hdev); |
1592 | hci_blacklist_clear(hdev); | |
2aeb9a1a | 1593 | hci_uuids_clear(hdev); |
55ed8ca1 | 1594 | hci_link_keys_clear(hdev); |
2763eda6 | 1595 | hci_remote_oob_data_clear(hdev); |
76c8686f | 1596 | hci_adv_entries_clear(hdev); |
e2e0cacb JH |
1597 | hci_dev_unlock_bh(hdev); |
1598 | ||
1da177e4 | 1599 | __hci_dev_put(hdev); |
1da177e4 LT |
1600 | } |
1601 | EXPORT_SYMBOL(hci_unregister_dev); | |
1602 | ||
1603 | /* Suspend HCI device */ | |
1604 | int hci_suspend_dev(struct hci_dev *hdev) | |
1605 | { | |
1606 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
1607 | return 0; | |
1608 | } | |
1609 | EXPORT_SYMBOL(hci_suspend_dev); | |
1610 | ||
1611 | /* Resume HCI device */ | |
1612 | int hci_resume_dev(struct hci_dev *hdev) | |
1613 | { | |
1614 | hci_notify(hdev, HCI_DEV_RESUME); | |
1615 | return 0; | |
1616 | } | |
1617 | EXPORT_SYMBOL(hci_resume_dev); | |
1618 | ||
76bca880 MH |
1619 | /* Receive frame from HCI drivers */ |
1620 | int hci_recv_frame(struct sk_buff *skb) | |
1621 | { | |
1622 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1623 | if (!hdev || (!test_bit(HCI_UP, &hdev->flags) | |
1624 | && !test_bit(HCI_INIT, &hdev->flags))) { | |
1625 | kfree_skb(skb); | |
1626 | return -ENXIO; | |
1627 | } | |
1628 | ||
1629 | /* Incomming skb */ | |
1630 | bt_cb(skb)->incoming = 1; | |
1631 | ||
1632 | /* Time stamp */ | |
1633 | __net_timestamp(skb); | |
1634 | ||
1635 | /* Queue frame for rx task */ | |
1636 | skb_queue_tail(&hdev->rx_q, skb); | |
c78ae283 MH |
1637 | tasklet_schedule(&hdev->rx_task); |
1638 | ||
76bca880 MH |
1639 | return 0; |
1640 | } | |
1641 | EXPORT_SYMBOL(hci_recv_frame); | |
1642 | ||
33e882a5 | 1643 | static int hci_reassembly(struct hci_dev *hdev, int type, void *data, |
1e429f38 | 1644 | int count, __u8 index) |
33e882a5 SS |
1645 | { |
1646 | int len = 0; | |
1647 | int hlen = 0; | |
1648 | int remain = count; | |
1649 | struct sk_buff *skb; | |
1650 | struct bt_skb_cb *scb; | |
1651 | ||
1652 | if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) || | |
1653 | index >= NUM_REASSEMBLY) | |
1654 | return -EILSEQ; | |
1655 | ||
1656 | skb = hdev->reassembly[index]; | |
1657 | ||
1658 | if (!skb) { | |
1659 | switch (type) { | |
1660 | case HCI_ACLDATA_PKT: | |
1661 | len = HCI_MAX_FRAME_SIZE; | |
1662 | hlen = HCI_ACL_HDR_SIZE; | |
1663 | break; | |
1664 | case HCI_EVENT_PKT: | |
1665 | len = HCI_MAX_EVENT_SIZE; | |
1666 | hlen = HCI_EVENT_HDR_SIZE; | |
1667 | break; | |
1668 | case HCI_SCODATA_PKT: | |
1669 | len = HCI_MAX_SCO_SIZE; | |
1670 | hlen = HCI_SCO_HDR_SIZE; | |
1671 | break; | |
1672 | } | |
1673 | ||
1e429f38 | 1674 | skb = bt_skb_alloc(len, GFP_ATOMIC); |
33e882a5 SS |
1675 | if (!skb) |
1676 | return -ENOMEM; | |
1677 | ||
1678 | scb = (void *) skb->cb; | |
1679 | scb->expect = hlen; | |
1680 | scb->pkt_type = type; | |
1681 | ||
1682 | skb->dev = (void *) hdev; | |
1683 | hdev->reassembly[index] = skb; | |
1684 | } | |
1685 | ||
1686 | while (count) { | |
1687 | scb = (void *) skb->cb; | |
1688 | len = min(scb->expect, (__u16)count); | |
1689 | ||
1690 | memcpy(skb_put(skb, len), data, len); | |
1691 | ||
1692 | count -= len; | |
1693 | data += len; | |
1694 | scb->expect -= len; | |
1695 | remain = count; | |
1696 | ||
1697 | switch (type) { | |
1698 | case HCI_EVENT_PKT: | |
1699 | if (skb->len == HCI_EVENT_HDR_SIZE) { | |
1700 | struct hci_event_hdr *h = hci_event_hdr(skb); | |
1701 | scb->expect = h->plen; | |
1702 | ||
1703 | if (skb_tailroom(skb) < scb->expect) { | |
1704 | kfree_skb(skb); | |
1705 | hdev->reassembly[index] = NULL; | |
1706 | return -ENOMEM; | |
1707 | } | |
1708 | } | |
1709 | break; | |
1710 | ||
1711 | case HCI_ACLDATA_PKT: | |
1712 | if (skb->len == HCI_ACL_HDR_SIZE) { | |
1713 | struct hci_acl_hdr *h = hci_acl_hdr(skb); | |
1714 | scb->expect = __le16_to_cpu(h->dlen); | |
1715 | ||
1716 | if (skb_tailroom(skb) < scb->expect) { | |
1717 | kfree_skb(skb); | |
1718 | hdev->reassembly[index] = NULL; | |
1719 | return -ENOMEM; | |
1720 | } | |
1721 | } | |
1722 | break; | |
1723 | ||
1724 | case HCI_SCODATA_PKT: | |
1725 | if (skb->len == HCI_SCO_HDR_SIZE) { | |
1726 | struct hci_sco_hdr *h = hci_sco_hdr(skb); | |
1727 | scb->expect = h->dlen; | |
1728 | ||
1729 | if (skb_tailroom(skb) < scb->expect) { | |
1730 | kfree_skb(skb); | |
1731 | hdev->reassembly[index] = NULL; | |
1732 | return -ENOMEM; | |
1733 | } | |
1734 | } | |
1735 | break; | |
1736 | } | |
1737 | ||
1738 | if (scb->expect == 0) { | |
1739 | /* Complete frame */ | |
1740 | ||
1741 | bt_cb(skb)->pkt_type = type; | |
1742 | hci_recv_frame(skb); | |
1743 | ||
1744 | hdev->reassembly[index] = NULL; | |
1745 | return remain; | |
1746 | } | |
1747 | } | |
1748 | ||
1749 | return remain; | |
1750 | } | |
1751 | ||
ef222013 MH |
1752 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) |
1753 | { | |
f39a3c06 SS |
1754 | int rem = 0; |
1755 | ||
ef222013 MH |
1756 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) |
1757 | return -EILSEQ; | |
1758 | ||
da5f6c37 | 1759 | while (count) { |
1e429f38 | 1760 | rem = hci_reassembly(hdev, type, data, count, type - 1); |
f39a3c06 SS |
1761 | if (rem < 0) |
1762 | return rem; | |
ef222013 | 1763 | |
f39a3c06 SS |
1764 | data += (count - rem); |
1765 | count = rem; | |
f81c6224 | 1766 | } |
ef222013 | 1767 | |
f39a3c06 | 1768 | return rem; |
ef222013 MH |
1769 | } |
1770 | EXPORT_SYMBOL(hci_recv_fragment); | |
1771 | ||
99811510 SS |
1772 | #define STREAM_REASSEMBLY 0 |
1773 | ||
1774 | int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count) | |
1775 | { | |
1776 | int type; | |
1777 | int rem = 0; | |
1778 | ||
da5f6c37 | 1779 | while (count) { |
99811510 SS |
1780 | struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY]; |
1781 | ||
1782 | if (!skb) { | |
1783 | struct { char type; } *pkt; | |
1784 | ||
1785 | /* Start of the frame */ | |
1786 | pkt = data; | |
1787 | type = pkt->type; | |
1788 | ||
1789 | data++; | |
1790 | count--; | |
1791 | } else | |
1792 | type = bt_cb(skb)->pkt_type; | |
1793 | ||
1e429f38 GP |
1794 | rem = hci_reassembly(hdev, type, data, count, |
1795 | STREAM_REASSEMBLY); | |
99811510 SS |
1796 | if (rem < 0) |
1797 | return rem; | |
1798 | ||
1799 | data += (count - rem); | |
1800 | count = rem; | |
f81c6224 | 1801 | } |
99811510 SS |
1802 | |
1803 | return rem; | |
1804 | } | |
1805 | EXPORT_SYMBOL(hci_recv_stream_fragment); | |
1806 | ||
1da177e4 LT |
1807 | /* ---- Interface to upper protocols ---- */ |
1808 | ||
1809 | /* Register/Unregister protocols. | |
1810 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1811 | int hci_register_proto(struct hci_proto *hp) | |
1812 | { | |
1813 | int err = 0; | |
1814 | ||
1815 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1816 | ||
1817 | if (hp->id >= HCI_MAX_PROTO) | |
1818 | return -EINVAL; | |
1819 | ||
1820 | write_lock_bh(&hci_task_lock); | |
1821 | ||
1822 | if (!hci_proto[hp->id]) | |
1823 | hci_proto[hp->id] = hp; | |
1824 | else | |
1825 | err = -EEXIST; | |
1826 | ||
1827 | write_unlock_bh(&hci_task_lock); | |
1828 | ||
1829 | return err; | |
1830 | } | |
1831 | EXPORT_SYMBOL(hci_register_proto); | |
1832 | ||
1833 | int hci_unregister_proto(struct hci_proto *hp) | |
1834 | { | |
1835 | int err = 0; | |
1836 | ||
1837 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1838 | ||
1839 | if (hp->id >= HCI_MAX_PROTO) | |
1840 | return -EINVAL; | |
1841 | ||
1842 | write_lock_bh(&hci_task_lock); | |
1843 | ||
1844 | if (hci_proto[hp->id]) | |
1845 | hci_proto[hp->id] = NULL; | |
1846 | else | |
1847 | err = -ENOENT; | |
1848 | ||
1849 | write_unlock_bh(&hci_task_lock); | |
1850 | ||
1851 | return err; | |
1852 | } | |
1853 | EXPORT_SYMBOL(hci_unregister_proto); | |
1854 | ||
1855 | int hci_register_cb(struct hci_cb *cb) | |
1856 | { | |
1857 | BT_DBG("%p name %s", cb, cb->name); | |
1858 | ||
1859 | write_lock_bh(&hci_cb_list_lock); | |
1860 | list_add(&cb->list, &hci_cb_list); | |
1861 | write_unlock_bh(&hci_cb_list_lock); | |
1862 | ||
1863 | return 0; | |
1864 | } | |
1865 | EXPORT_SYMBOL(hci_register_cb); | |
1866 | ||
1867 | int hci_unregister_cb(struct hci_cb *cb) | |
1868 | { | |
1869 | BT_DBG("%p name %s", cb, cb->name); | |
1870 | ||
1871 | write_lock_bh(&hci_cb_list_lock); | |
1872 | list_del(&cb->list); | |
1873 | write_unlock_bh(&hci_cb_list_lock); | |
1874 | ||
1875 | return 0; | |
1876 | } | |
1877 | EXPORT_SYMBOL(hci_unregister_cb); | |
1878 | ||
1879 | static int hci_send_frame(struct sk_buff *skb) | |
1880 | { | |
1881 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1882 | ||
1883 | if (!hdev) { | |
1884 | kfree_skb(skb); | |
1885 | return -ENODEV; | |
1886 | } | |
1887 | ||
0d48d939 | 1888 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1889 | |
1890 | if (atomic_read(&hdev->promisc)) { | |
1891 | /* Time stamp */ | |
a61bbcf2 | 1892 | __net_timestamp(skb); |
1da177e4 | 1893 | |
eec8d2bc | 1894 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
1895 | } |
1896 | ||
1897 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1898 | skb_orphan(skb); | |
1899 | ||
1900 | return hdev->send(skb); | |
1901 | } | |
1902 | ||
1903 | /* Send HCI command */ | |
a9de9248 | 1904 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1905 | { |
1906 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1907 | struct hci_command_hdr *hdr; | |
1908 | struct sk_buff *skb; | |
1909 | ||
a9de9248 | 1910 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1911 | |
1912 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1913 | if (!skb) { | |
ef222013 | 1914 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1915 | return -ENOMEM; |
1916 | } | |
1917 | ||
1918 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1919 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1920 | hdr->plen = plen; |
1921 | ||
1922 | if (plen) | |
1923 | memcpy(skb_put(skb, plen), param, plen); | |
1924 | ||
1925 | BT_DBG("skb len %d", skb->len); | |
1926 | ||
0d48d939 | 1927 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 1928 | skb->dev = (void *) hdev; |
c78ae283 | 1929 | |
a5040efa JH |
1930 | if (test_bit(HCI_INIT, &hdev->flags)) |
1931 | hdev->init_last_cmd = opcode; | |
1932 | ||
1da177e4 | 1933 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 1934 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
1935 | |
1936 | return 0; | |
1937 | } | |
1da177e4 LT |
1938 | |
1939 | /* Get data from the previously sent command */ | |
a9de9248 | 1940 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1941 | { |
1942 | struct hci_command_hdr *hdr; | |
1943 | ||
1944 | if (!hdev->sent_cmd) | |
1945 | return NULL; | |
1946 | ||
1947 | hdr = (void *) hdev->sent_cmd->data; | |
1948 | ||
a9de9248 | 1949 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1950 | return NULL; |
1951 | ||
a9de9248 | 1952 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1953 | |
1954 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1955 | } | |
1956 | ||
1957 | /* Send ACL data */ | |
1958 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1959 | { | |
1960 | struct hci_acl_hdr *hdr; | |
1961 | int len = skb->len; | |
1962 | ||
badff6d0 ACM |
1963 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1964 | skb_reset_transport_header(skb); | |
9c70220b | 1965 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1966 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1967 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1968 | } |
1969 | ||
73d80deb LAD |
1970 | static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue, |
1971 | struct sk_buff *skb, __u16 flags) | |
1da177e4 LT |
1972 | { |
1973 | struct hci_dev *hdev = conn->hdev; | |
1974 | struct sk_buff *list; | |
1975 | ||
70f23020 AE |
1976 | list = skb_shinfo(skb)->frag_list; |
1977 | if (!list) { | |
1da177e4 LT |
1978 | /* Non fragmented */ |
1979 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1980 | ||
73d80deb | 1981 | skb_queue_tail(queue, skb); |
1da177e4 LT |
1982 | } else { |
1983 | /* Fragmented */ | |
1984 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1985 | ||
1986 | skb_shinfo(skb)->frag_list = NULL; | |
1987 | ||
1988 | /* Queue all fragments atomically */ | |
73d80deb | 1989 | spin_lock_bh(&queue->lock); |
1da177e4 | 1990 | |
73d80deb | 1991 | __skb_queue_tail(queue, skb); |
e702112f AE |
1992 | |
1993 | flags &= ~ACL_START; | |
1994 | flags |= ACL_CONT; | |
1da177e4 LT |
1995 | do { |
1996 | skb = list; list = list->next; | |
8e87d142 | 1997 | |
1da177e4 | 1998 | skb->dev = (void *) hdev; |
0d48d939 | 1999 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 2000 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 LT |
2001 | |
2002 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
2003 | ||
73d80deb | 2004 | __skb_queue_tail(queue, skb); |
1da177e4 LT |
2005 | } while (list); |
2006 | ||
73d80deb | 2007 | spin_unlock_bh(&queue->lock); |
1da177e4 | 2008 | } |
73d80deb LAD |
2009 | } |
2010 | ||
2011 | void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags) | |
2012 | { | |
2013 | struct hci_conn *conn = chan->conn; | |
2014 | struct hci_dev *hdev = conn->hdev; | |
2015 | ||
2016 | BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags); | |
2017 | ||
2018 | skb->dev = (void *) hdev; | |
2019 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; | |
2020 | hci_add_acl_hdr(skb, conn->handle, flags); | |
2021 | ||
2022 | hci_queue_acl(conn, &chan->data_q, skb, flags); | |
1da177e4 | 2023 | |
c78ae283 | 2024 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
2025 | } |
2026 | EXPORT_SYMBOL(hci_send_acl); | |
2027 | ||
2028 | /* Send SCO data */ | |
0d861d8b | 2029 | void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
2030 | { |
2031 | struct hci_dev *hdev = conn->hdev; | |
2032 | struct hci_sco_hdr hdr; | |
2033 | ||
2034 | BT_DBG("%s len %d", hdev->name, skb->len); | |
2035 | ||
aca3192c | 2036 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
2037 | hdr.dlen = skb->len; |
2038 | ||
badff6d0 ACM |
2039 | skb_push(skb, HCI_SCO_HDR_SIZE); |
2040 | skb_reset_transport_header(skb); | |
9c70220b | 2041 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
2042 | |
2043 | skb->dev = (void *) hdev; | |
0d48d939 | 2044 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
c78ae283 | 2045 | |
1da177e4 | 2046 | skb_queue_tail(&conn->data_q, skb); |
c78ae283 | 2047 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
2048 | } |
2049 | EXPORT_SYMBOL(hci_send_sco); | |
2050 | ||
2051 | /* ---- HCI TX task (outgoing data) ---- */ | |
2052 | ||
2053 | /* HCI Connection scheduler */ | |
2054 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
2055 | { | |
2056 | struct hci_conn_hash *h = &hdev->conn_hash; | |
8035ded4 | 2057 | struct hci_conn *conn = NULL, *c; |
1da177e4 | 2058 | int num = 0, min = ~0; |
1da177e4 | 2059 | |
8e87d142 | 2060 | /* We don't have to lock device here. Connections are always |
1da177e4 | 2061 | * added and removed with TX task disabled. */ |
8035ded4 | 2062 | list_for_each_entry(c, &h->list, list) { |
769be974 | 2063 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 2064 | continue; |
769be974 MH |
2065 | |
2066 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
2067 | continue; | |
2068 | ||
1da177e4 LT |
2069 | num++; |
2070 | ||
2071 | if (c->sent < min) { | |
2072 | min = c->sent; | |
2073 | conn = c; | |
2074 | } | |
52087a79 LAD |
2075 | |
2076 | if (hci_conn_num(hdev, type) == num) | |
2077 | break; | |
1da177e4 LT |
2078 | } |
2079 | ||
2080 | if (conn) { | |
6ed58ec5 VT |
2081 | int cnt, q; |
2082 | ||
2083 | switch (conn->type) { | |
2084 | case ACL_LINK: | |
2085 | cnt = hdev->acl_cnt; | |
2086 | break; | |
2087 | case SCO_LINK: | |
2088 | case ESCO_LINK: | |
2089 | cnt = hdev->sco_cnt; | |
2090 | break; | |
2091 | case LE_LINK: | |
2092 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; | |
2093 | break; | |
2094 | default: | |
2095 | cnt = 0; | |
2096 | BT_ERR("Unknown link type"); | |
2097 | } | |
2098 | ||
2099 | q = cnt / num; | |
1da177e4 LT |
2100 | *quote = q ? q : 1; |
2101 | } else | |
2102 | *quote = 0; | |
2103 | ||
2104 | BT_DBG("conn %p quote %d", conn, *quote); | |
2105 | return conn; | |
2106 | } | |
2107 | ||
bae1f5d9 | 2108 | static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type) |
1da177e4 LT |
2109 | { |
2110 | struct hci_conn_hash *h = &hdev->conn_hash; | |
8035ded4 | 2111 | struct hci_conn *c; |
1da177e4 | 2112 | |
bae1f5d9 | 2113 | BT_ERR("%s link tx timeout", hdev->name); |
1da177e4 LT |
2114 | |
2115 | /* Kill stalled connections */ | |
8035ded4 | 2116 | list_for_each_entry(c, &h->list, list) { |
bae1f5d9 VT |
2117 | if (c->type == type && c->sent) { |
2118 | BT_ERR("%s killing stalled connection %s", | |
1da177e4 LT |
2119 | hdev->name, batostr(&c->dst)); |
2120 | hci_acl_disconn(c, 0x13); | |
2121 | } | |
2122 | } | |
2123 | } | |
2124 | ||
73d80deb LAD |
2125 | static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type, |
2126 | int *quote) | |
1da177e4 | 2127 | { |
73d80deb LAD |
2128 | struct hci_conn_hash *h = &hdev->conn_hash; |
2129 | struct hci_chan *chan = NULL; | |
2130 | int num = 0, min = ~0, cur_prio = 0; | |
1da177e4 | 2131 | struct hci_conn *conn; |
73d80deb LAD |
2132 | int cnt, q, conn_num = 0; |
2133 | ||
2134 | BT_DBG("%s", hdev->name); | |
2135 | ||
2136 | list_for_each_entry(conn, &h->list, list) { | |
2137 | struct hci_chan_hash *ch; | |
2138 | struct hci_chan *tmp; | |
2139 | ||
2140 | if (conn->type != type) | |
2141 | continue; | |
2142 | ||
2143 | if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) | |
2144 | continue; | |
2145 | ||
2146 | conn_num++; | |
2147 | ||
2148 | ch = &conn->chan_hash; | |
2149 | ||
2150 | list_for_each_entry(tmp, &ch->list, list) { | |
2151 | struct sk_buff *skb; | |
2152 | ||
2153 | if (skb_queue_empty(&tmp->data_q)) | |
2154 | continue; | |
2155 | ||
2156 | skb = skb_peek(&tmp->data_q); | |
2157 | if (skb->priority < cur_prio) | |
2158 | continue; | |
2159 | ||
2160 | if (skb->priority > cur_prio) { | |
2161 | num = 0; | |
2162 | min = ~0; | |
2163 | cur_prio = skb->priority; | |
2164 | } | |
2165 | ||
2166 | num++; | |
2167 | ||
2168 | if (conn->sent < min) { | |
2169 | min = conn->sent; | |
2170 | chan = tmp; | |
2171 | } | |
2172 | } | |
2173 | ||
2174 | if (hci_conn_num(hdev, type) == conn_num) | |
2175 | break; | |
2176 | } | |
2177 | ||
2178 | if (!chan) | |
2179 | return NULL; | |
2180 | ||
2181 | switch (chan->conn->type) { | |
2182 | case ACL_LINK: | |
2183 | cnt = hdev->acl_cnt; | |
2184 | break; | |
2185 | case SCO_LINK: | |
2186 | case ESCO_LINK: | |
2187 | cnt = hdev->sco_cnt; | |
2188 | break; | |
2189 | case LE_LINK: | |
2190 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; | |
2191 | break; | |
2192 | default: | |
2193 | cnt = 0; | |
2194 | BT_ERR("Unknown link type"); | |
2195 | } | |
2196 | ||
2197 | q = cnt / num; | |
2198 | *quote = q ? q : 1; | |
2199 | BT_DBG("chan %p quote %d", chan, *quote); | |
2200 | return chan; | |
2201 | } | |
2202 | ||
02b20f0b LAD |
2203 | static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type) |
2204 | { | |
2205 | struct hci_conn_hash *h = &hdev->conn_hash; | |
2206 | struct hci_conn *conn; | |
2207 | int num = 0; | |
2208 | ||
2209 | BT_DBG("%s", hdev->name); | |
2210 | ||
2211 | list_for_each_entry(conn, &h->list, list) { | |
2212 | struct hci_chan_hash *ch; | |
2213 | struct hci_chan *chan; | |
2214 | ||
2215 | if (conn->type != type) | |
2216 | continue; | |
2217 | ||
2218 | if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) | |
2219 | continue; | |
2220 | ||
2221 | num++; | |
2222 | ||
2223 | ch = &conn->chan_hash; | |
2224 | list_for_each_entry(chan, &ch->list, list) { | |
2225 | struct sk_buff *skb; | |
2226 | ||
2227 | if (chan->sent) { | |
2228 | chan->sent = 0; | |
2229 | continue; | |
2230 | } | |
2231 | ||
2232 | if (skb_queue_empty(&chan->data_q)) | |
2233 | continue; | |
2234 | ||
2235 | skb = skb_peek(&chan->data_q); | |
2236 | if (skb->priority >= HCI_PRIO_MAX - 1) | |
2237 | continue; | |
2238 | ||
2239 | skb->priority = HCI_PRIO_MAX - 1; | |
2240 | ||
2241 | BT_DBG("chan %p skb %p promoted to %d", chan, skb, | |
2242 | skb->priority); | |
2243 | } | |
2244 | ||
2245 | if (hci_conn_num(hdev, type) == num) | |
2246 | break; | |
2247 | } | |
2248 | } | |
2249 | ||
73d80deb LAD |
2250 | static inline void hci_sched_acl(struct hci_dev *hdev) |
2251 | { | |
2252 | struct hci_chan *chan; | |
1da177e4 LT |
2253 | struct sk_buff *skb; |
2254 | int quote; | |
73d80deb | 2255 | unsigned int cnt; |
1da177e4 LT |
2256 | |
2257 | BT_DBG("%s", hdev->name); | |
2258 | ||
52087a79 LAD |
2259 | if (!hci_conn_num(hdev, ACL_LINK)) |
2260 | return; | |
2261 | ||
1da177e4 LT |
2262 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
2263 | /* ACL tx timeout must be longer than maximum | |
2264 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 2265 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
bae1f5d9 | 2266 | hci_link_tx_to(hdev, ACL_LINK); |
1da177e4 LT |
2267 | } |
2268 | ||
73d80deb | 2269 | cnt = hdev->acl_cnt; |
04837f64 | 2270 | |
73d80deb LAD |
2271 | while (hdev->acl_cnt && |
2272 | (chan = hci_chan_sent(hdev, ACL_LINK, "e))) { | |
ec1cce24 LAD |
2273 | u32 priority = (skb_peek(&chan->data_q))->priority; |
2274 | while (quote-- && (skb = skb_peek(&chan->data_q))) { | |
73d80deb LAD |
2275 | BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
2276 | skb->len, skb->priority); | |
2277 | ||
ec1cce24 LAD |
2278 | /* Stop if priority has changed */ |
2279 | if (skb->priority < priority) | |
2280 | break; | |
2281 | ||
2282 | skb = skb_dequeue(&chan->data_q); | |
2283 | ||
73d80deb LAD |
2284 | hci_conn_enter_active_mode(chan->conn, |
2285 | bt_cb(skb)->force_active); | |
04837f64 | 2286 | |
1da177e4 LT |
2287 | hci_send_frame(skb); |
2288 | hdev->acl_last_tx = jiffies; | |
2289 | ||
2290 | hdev->acl_cnt--; | |
73d80deb LAD |
2291 | chan->sent++; |
2292 | chan->conn->sent++; | |
1da177e4 LT |
2293 | } |
2294 | } | |
02b20f0b LAD |
2295 | |
2296 | if (cnt != hdev->acl_cnt) | |
2297 | hci_prio_recalculate(hdev, ACL_LINK); | |
1da177e4 LT |
2298 | } |
2299 | ||
2300 | /* Schedule SCO */ | |
2301 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
2302 | { | |
2303 | struct hci_conn *conn; | |
2304 | struct sk_buff *skb; | |
2305 | int quote; | |
2306 | ||
2307 | BT_DBG("%s", hdev->name); | |
2308 | ||
52087a79 LAD |
2309 | if (!hci_conn_num(hdev, SCO_LINK)) |
2310 | return; | |
2311 | ||
1da177e4 LT |
2312 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { |
2313 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
2314 | BT_DBG("skb %p len %d", skb, skb->len); | |
2315 | hci_send_frame(skb); | |
2316 | ||
2317 | conn->sent++; | |
2318 | if (conn->sent == ~0) | |
2319 | conn->sent = 0; | |
2320 | } | |
2321 | } | |
2322 | } | |
2323 | ||
b6a0dc82 MH |
2324 | static inline void hci_sched_esco(struct hci_dev *hdev) |
2325 | { | |
2326 | struct hci_conn *conn; | |
2327 | struct sk_buff *skb; | |
2328 | int quote; | |
2329 | ||
2330 | BT_DBG("%s", hdev->name); | |
2331 | ||
52087a79 LAD |
2332 | if (!hci_conn_num(hdev, ESCO_LINK)) |
2333 | return; | |
2334 | ||
b6a0dc82 MH |
2335 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { |
2336 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
2337 | BT_DBG("skb %p len %d", skb, skb->len); | |
2338 | hci_send_frame(skb); | |
2339 | ||
2340 | conn->sent++; | |
2341 | if (conn->sent == ~0) | |
2342 | conn->sent = 0; | |
2343 | } | |
2344 | } | |
2345 | } | |
2346 | ||
6ed58ec5 VT |
2347 | static inline void hci_sched_le(struct hci_dev *hdev) |
2348 | { | |
73d80deb | 2349 | struct hci_chan *chan; |
6ed58ec5 | 2350 | struct sk_buff *skb; |
02b20f0b | 2351 | int quote, cnt, tmp; |
6ed58ec5 VT |
2352 | |
2353 | BT_DBG("%s", hdev->name); | |
2354 | ||
52087a79 LAD |
2355 | if (!hci_conn_num(hdev, LE_LINK)) |
2356 | return; | |
2357 | ||
6ed58ec5 VT |
2358 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
2359 | /* LE tx timeout must be longer than maximum | |
2360 | * link supervision timeout (40.9 seconds) */ | |
bae1f5d9 | 2361 | if (!hdev->le_cnt && hdev->le_pkts && |
6ed58ec5 | 2362 | time_after(jiffies, hdev->le_last_tx + HZ * 45)) |
bae1f5d9 | 2363 | hci_link_tx_to(hdev, LE_LINK); |
6ed58ec5 VT |
2364 | } |
2365 | ||
2366 | cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt; | |
02b20f0b | 2367 | tmp = cnt; |
73d80deb | 2368 | while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) { |
ec1cce24 LAD |
2369 | u32 priority = (skb_peek(&chan->data_q))->priority; |
2370 | while (quote-- && (skb = skb_peek(&chan->data_q))) { | |
73d80deb LAD |
2371 | BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
2372 | skb->len, skb->priority); | |
6ed58ec5 | 2373 | |
ec1cce24 LAD |
2374 | /* Stop if priority has changed */ |
2375 | if (skb->priority < priority) | |
2376 | break; | |
2377 | ||
2378 | skb = skb_dequeue(&chan->data_q); | |
2379 | ||
6ed58ec5 VT |
2380 | hci_send_frame(skb); |
2381 | hdev->le_last_tx = jiffies; | |
2382 | ||
2383 | cnt--; | |
73d80deb LAD |
2384 | chan->sent++; |
2385 | chan->conn->sent++; | |
6ed58ec5 VT |
2386 | } |
2387 | } | |
73d80deb | 2388 | |
6ed58ec5 VT |
2389 | if (hdev->le_pkts) |
2390 | hdev->le_cnt = cnt; | |
2391 | else | |
2392 | hdev->acl_cnt = cnt; | |
02b20f0b LAD |
2393 | |
2394 | if (cnt != tmp) | |
2395 | hci_prio_recalculate(hdev, LE_LINK); | |
6ed58ec5 VT |
2396 | } |
2397 | ||
1da177e4 LT |
2398 | static void hci_tx_task(unsigned long arg) |
2399 | { | |
2400 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2401 | struct sk_buff *skb; | |
2402 | ||
2403 | read_lock(&hci_task_lock); | |
2404 | ||
6ed58ec5 VT |
2405 | BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt, |
2406 | hdev->sco_cnt, hdev->le_cnt); | |
1da177e4 LT |
2407 | |
2408 | /* Schedule queues and send stuff to HCI driver */ | |
2409 | ||
2410 | hci_sched_acl(hdev); | |
2411 | ||
2412 | hci_sched_sco(hdev); | |
2413 | ||
b6a0dc82 MH |
2414 | hci_sched_esco(hdev); |
2415 | ||
6ed58ec5 VT |
2416 | hci_sched_le(hdev); |
2417 | ||
1da177e4 LT |
2418 | /* Send next queued raw (unknown type) packet */ |
2419 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
2420 | hci_send_frame(skb); | |
2421 | ||
2422 | read_unlock(&hci_task_lock); | |
2423 | } | |
2424 | ||
25985edc | 2425 | /* ----- HCI RX task (incoming data processing) ----- */ |
1da177e4 LT |
2426 | |
2427 | /* ACL data packet */ | |
2428 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
2429 | { | |
2430 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
2431 | struct hci_conn *conn; | |
2432 | __u16 handle, flags; | |
2433 | ||
2434 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
2435 | ||
2436 | handle = __le16_to_cpu(hdr->handle); | |
2437 | flags = hci_flags(handle); | |
2438 | handle = hci_handle(handle); | |
2439 | ||
2440 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
2441 | ||
2442 | hdev->stat.acl_rx++; | |
2443 | ||
2444 | hci_dev_lock(hdev); | |
2445 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
2446 | hci_dev_unlock(hdev); | |
8e87d142 | 2447 | |
1da177e4 LT |
2448 | if (conn) { |
2449 | register struct hci_proto *hp; | |
2450 | ||
14b12d0b | 2451 | hci_conn_enter_active_mode(conn, bt_cb(skb)->force_active); |
04837f64 | 2452 | |
1da177e4 | 2453 | /* Send to upper protocol */ |
70f23020 AE |
2454 | hp = hci_proto[HCI_PROTO_L2CAP]; |
2455 | if (hp && hp->recv_acldata) { | |
1da177e4 LT |
2456 | hp->recv_acldata(conn, skb, flags); |
2457 | return; | |
2458 | } | |
2459 | } else { | |
8e87d142 | 2460 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
2461 | hdev->name, handle); |
2462 | } | |
2463 | ||
2464 | kfree_skb(skb); | |
2465 | } | |
2466 | ||
2467 | /* SCO data packet */ | |
2468 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
2469 | { | |
2470 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
2471 | struct hci_conn *conn; | |
2472 | __u16 handle; | |
2473 | ||
2474 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
2475 | ||
2476 | handle = __le16_to_cpu(hdr->handle); | |
2477 | ||
2478 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
2479 | ||
2480 | hdev->stat.sco_rx++; | |
2481 | ||
2482 | hci_dev_lock(hdev); | |
2483 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
2484 | hci_dev_unlock(hdev); | |
2485 | ||
2486 | if (conn) { | |
2487 | register struct hci_proto *hp; | |
2488 | ||
2489 | /* Send to upper protocol */ | |
70f23020 AE |
2490 | hp = hci_proto[HCI_PROTO_SCO]; |
2491 | if (hp && hp->recv_scodata) { | |
1da177e4 LT |
2492 | hp->recv_scodata(conn, skb); |
2493 | return; | |
2494 | } | |
2495 | } else { | |
8e87d142 | 2496 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
2497 | hdev->name, handle); |
2498 | } | |
2499 | ||
2500 | kfree_skb(skb); | |
2501 | } | |
2502 | ||
6516455d | 2503 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
2504 | { |
2505 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2506 | struct sk_buff *skb; | |
2507 | ||
2508 | BT_DBG("%s", hdev->name); | |
2509 | ||
2510 | read_lock(&hci_task_lock); | |
2511 | ||
2512 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
2513 | if (atomic_read(&hdev->promisc)) { | |
2514 | /* Send copy to the sockets */ | |
eec8d2bc | 2515 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
2516 | } |
2517 | ||
2518 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
2519 | kfree_skb(skb); | |
2520 | continue; | |
2521 | } | |
2522 | ||
2523 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
2524 | /* Don't process data packets in this states. */ | |
0d48d939 | 2525 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
2526 | case HCI_ACLDATA_PKT: |
2527 | case HCI_SCODATA_PKT: | |
2528 | kfree_skb(skb); | |
2529 | continue; | |
3ff50b79 | 2530 | } |
1da177e4 LT |
2531 | } |
2532 | ||
2533 | /* Process frame */ | |
0d48d939 | 2534 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
2535 | case HCI_EVENT_PKT: |
2536 | hci_event_packet(hdev, skb); | |
2537 | break; | |
2538 | ||
2539 | case HCI_ACLDATA_PKT: | |
2540 | BT_DBG("%s ACL data packet", hdev->name); | |
2541 | hci_acldata_packet(hdev, skb); | |
2542 | break; | |
2543 | ||
2544 | case HCI_SCODATA_PKT: | |
2545 | BT_DBG("%s SCO data packet", hdev->name); | |
2546 | hci_scodata_packet(hdev, skb); | |
2547 | break; | |
2548 | ||
2549 | default: | |
2550 | kfree_skb(skb); | |
2551 | break; | |
2552 | } | |
2553 | } | |
2554 | ||
2555 | read_unlock(&hci_task_lock); | |
2556 | } | |
2557 | ||
2558 | static void hci_cmd_task(unsigned long arg) | |
2559 | { | |
2560 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2561 | struct sk_buff *skb; | |
2562 | ||
2563 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
2564 | ||
1da177e4 | 2565 | /* Send queued commands */ |
5a08ecce AE |
2566 | if (atomic_read(&hdev->cmd_cnt)) { |
2567 | skb = skb_dequeue(&hdev->cmd_q); | |
2568 | if (!skb) | |
2569 | return; | |
2570 | ||
7585b97a | 2571 | kfree_skb(hdev->sent_cmd); |
1da177e4 | 2572 | |
70f23020 AE |
2573 | hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC); |
2574 | if (hdev->sent_cmd) { | |
1da177e4 LT |
2575 | atomic_dec(&hdev->cmd_cnt); |
2576 | hci_send_frame(skb); | |
7bdb8a5c SJ |
2577 | if (test_bit(HCI_RESET, &hdev->flags)) |
2578 | del_timer(&hdev->cmd_timer); | |
2579 | else | |
2580 | mod_timer(&hdev->cmd_timer, | |
6bd32326 | 2581 | jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT)); |
1da177e4 LT |
2582 | } else { |
2583 | skb_queue_head(&hdev->cmd_q, skb); | |
c78ae283 | 2584 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
2585 | } |
2586 | } | |
2587 | } | |
2519a1fc AG |
2588 | |
2589 | int hci_do_inquiry(struct hci_dev *hdev, u8 length) | |
2590 | { | |
2591 | /* General inquiry access code (GIAC) */ | |
2592 | u8 lap[3] = { 0x33, 0x8b, 0x9e }; | |
2593 | struct hci_cp_inquiry cp; | |
2594 | ||
2595 | BT_DBG("%s", hdev->name); | |
2596 | ||
2597 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
2598 | return -EINPROGRESS; | |
2599 | ||
2600 | memset(&cp, 0, sizeof(cp)); | |
2601 | memcpy(&cp.lap, lap, sizeof(cp.lap)); | |
2602 | cp.length = length; | |
2603 | ||
2604 | return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); | |
2605 | } | |
023d5049 AG |
2606 | |
2607 | int hci_cancel_inquiry(struct hci_dev *hdev) | |
2608 | { | |
2609 | BT_DBG("%s", hdev->name); | |
2610 | ||
2611 | if (!test_bit(HCI_INQUIRY, &hdev->flags)) | |
2612 | return -EPERM; | |
2613 | ||
2614 | return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL); | |
2615 | } |