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 | ||
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); | |
56e5cb86 JH |
552 | if (!test_bit(HCI_SETUP, &hdev->flags)) { |
553 | hci_dev_lock_bh(hdev); | |
744cf19e | 554 | mgmt_powered(hdev, 1); |
56e5cb86 JH |
555 | hci_dev_unlock_bh(hdev); |
556 | } | |
8e87d142 | 557 | } else { |
1da177e4 LT |
558 | /* Init failed, cleanup */ |
559 | tasklet_kill(&hdev->rx_task); | |
560 | tasklet_kill(&hdev->tx_task); | |
561 | tasklet_kill(&hdev->cmd_task); | |
562 | ||
563 | skb_queue_purge(&hdev->cmd_q); | |
564 | skb_queue_purge(&hdev->rx_q); | |
565 | ||
566 | if (hdev->flush) | |
567 | hdev->flush(hdev); | |
568 | ||
569 | if (hdev->sent_cmd) { | |
570 | kfree_skb(hdev->sent_cmd); | |
571 | hdev->sent_cmd = NULL; | |
572 | } | |
573 | ||
574 | hdev->close(hdev); | |
575 | hdev->flags = 0; | |
576 | } | |
577 | ||
578 | done: | |
579 | hci_req_unlock(hdev); | |
580 | hci_dev_put(hdev); | |
581 | return ret; | |
582 | } | |
583 | ||
584 | static int hci_dev_do_close(struct hci_dev *hdev) | |
585 | { | |
586 | BT_DBG("%s %p", hdev->name, hdev); | |
587 | ||
588 | hci_req_cancel(hdev, ENODEV); | |
589 | hci_req_lock(hdev); | |
590 | ||
591 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { | |
b79f44c1 | 592 | del_timer_sync(&hdev->cmd_timer); |
1da177e4 LT |
593 | hci_req_unlock(hdev); |
594 | return 0; | |
595 | } | |
596 | ||
597 | /* Kill RX and TX tasks */ | |
598 | tasklet_kill(&hdev->rx_task); | |
599 | tasklet_kill(&hdev->tx_task); | |
600 | ||
16ab91ab JH |
601 | if (hdev->discov_timeout > 0) { |
602 | cancel_delayed_work_sync(&hdev->discov_off); | |
603 | hdev->discov_timeout = 0; | |
604 | } | |
605 | ||
3243553f JH |
606 | if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->flags)) |
607 | cancel_delayed_work_sync(&hdev->power_off); | |
608 | ||
1da177e4 LT |
609 | hci_dev_lock_bh(hdev); |
610 | inquiry_cache_flush(hdev); | |
611 | hci_conn_hash_flush(hdev); | |
612 | hci_dev_unlock_bh(hdev); | |
613 | ||
614 | hci_notify(hdev, HCI_DEV_DOWN); | |
615 | ||
616 | if (hdev->flush) | |
617 | hdev->flush(hdev); | |
618 | ||
619 | /* Reset device */ | |
620 | skb_queue_purge(&hdev->cmd_q); | |
621 | atomic_set(&hdev->cmd_cnt, 1); | |
622 | if (!test_bit(HCI_RAW, &hdev->flags)) { | |
623 | set_bit(HCI_INIT, &hdev->flags); | |
04837f64 | 624 | __hci_request(hdev, hci_reset_req, 0, |
43611a7b | 625 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
1da177e4 LT |
626 | clear_bit(HCI_INIT, &hdev->flags); |
627 | } | |
628 | ||
629 | /* Kill cmd task */ | |
630 | tasklet_kill(&hdev->cmd_task); | |
631 | ||
632 | /* Drop queues */ | |
633 | skb_queue_purge(&hdev->rx_q); | |
634 | skb_queue_purge(&hdev->cmd_q); | |
635 | skb_queue_purge(&hdev->raw_q); | |
636 | ||
637 | /* Drop last sent command */ | |
638 | if (hdev->sent_cmd) { | |
b79f44c1 | 639 | del_timer_sync(&hdev->cmd_timer); |
1da177e4 LT |
640 | kfree_skb(hdev->sent_cmd); |
641 | hdev->sent_cmd = NULL; | |
642 | } | |
643 | ||
644 | /* After this point our queues are empty | |
645 | * and no tasks are scheduled. */ | |
646 | hdev->close(hdev); | |
647 | ||
56e5cb86 | 648 | hci_dev_lock_bh(hdev); |
744cf19e | 649 | mgmt_powered(hdev, 0); |
56e5cb86 | 650 | hci_dev_unlock_bh(hdev); |
5add6af8 | 651 | |
1da177e4 LT |
652 | /* Clear flags */ |
653 | hdev->flags = 0; | |
654 | ||
655 | hci_req_unlock(hdev); | |
656 | ||
657 | hci_dev_put(hdev); | |
658 | return 0; | |
659 | } | |
660 | ||
661 | int hci_dev_close(__u16 dev) | |
662 | { | |
663 | struct hci_dev *hdev; | |
664 | int err; | |
665 | ||
70f23020 AE |
666 | hdev = hci_dev_get(dev); |
667 | if (!hdev) | |
1da177e4 LT |
668 | return -ENODEV; |
669 | err = hci_dev_do_close(hdev); | |
670 | hci_dev_put(hdev); | |
671 | return err; | |
672 | } | |
673 | ||
674 | int hci_dev_reset(__u16 dev) | |
675 | { | |
676 | struct hci_dev *hdev; | |
677 | int ret = 0; | |
678 | ||
70f23020 AE |
679 | hdev = hci_dev_get(dev); |
680 | if (!hdev) | |
1da177e4 LT |
681 | return -ENODEV; |
682 | ||
683 | hci_req_lock(hdev); | |
684 | tasklet_disable(&hdev->tx_task); | |
685 | ||
686 | if (!test_bit(HCI_UP, &hdev->flags)) | |
687 | goto done; | |
688 | ||
689 | /* Drop queues */ | |
690 | skb_queue_purge(&hdev->rx_q); | |
691 | skb_queue_purge(&hdev->cmd_q); | |
692 | ||
693 | hci_dev_lock_bh(hdev); | |
694 | inquiry_cache_flush(hdev); | |
695 | hci_conn_hash_flush(hdev); | |
696 | hci_dev_unlock_bh(hdev); | |
697 | ||
698 | if (hdev->flush) | |
699 | hdev->flush(hdev); | |
700 | ||
8e87d142 | 701 | atomic_set(&hdev->cmd_cnt, 1); |
6ed58ec5 | 702 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0; |
1da177e4 LT |
703 | |
704 | if (!test_bit(HCI_RAW, &hdev->flags)) | |
04837f64 MH |
705 | ret = __hci_request(hdev, hci_reset_req, 0, |
706 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
707 | |
708 | done: | |
709 | tasklet_enable(&hdev->tx_task); | |
710 | hci_req_unlock(hdev); | |
711 | hci_dev_put(hdev); | |
712 | return ret; | |
713 | } | |
714 | ||
715 | int hci_dev_reset_stat(__u16 dev) | |
716 | { | |
717 | struct hci_dev *hdev; | |
718 | int ret = 0; | |
719 | ||
70f23020 AE |
720 | hdev = hci_dev_get(dev); |
721 | if (!hdev) | |
1da177e4 LT |
722 | return -ENODEV; |
723 | ||
724 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); | |
725 | ||
726 | hci_dev_put(hdev); | |
727 | ||
728 | return ret; | |
729 | } | |
730 | ||
731 | int hci_dev_cmd(unsigned int cmd, void __user *arg) | |
732 | { | |
733 | struct hci_dev *hdev; | |
734 | struct hci_dev_req dr; | |
735 | int err = 0; | |
736 | ||
737 | if (copy_from_user(&dr, arg, sizeof(dr))) | |
738 | return -EFAULT; | |
739 | ||
70f23020 AE |
740 | hdev = hci_dev_get(dr.dev_id); |
741 | if (!hdev) | |
1da177e4 LT |
742 | return -ENODEV; |
743 | ||
744 | switch (cmd) { | |
745 | case HCISETAUTH: | |
04837f64 MH |
746 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
747 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
748 | break; |
749 | ||
750 | case HCISETENCRYPT: | |
751 | if (!lmp_encrypt_capable(hdev)) { | |
752 | err = -EOPNOTSUPP; | |
753 | break; | |
754 | } | |
755 | ||
756 | if (!test_bit(HCI_AUTH, &hdev->flags)) { | |
757 | /* Auth must be enabled first */ | |
04837f64 MH |
758 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
759 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
760 | if (err) |
761 | break; | |
762 | } | |
763 | ||
04837f64 MH |
764 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
765 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
766 | break; |
767 | ||
768 | case HCISETSCAN: | |
04837f64 MH |
769 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
770 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
771 | break; |
772 | ||
1da177e4 | 773 | case HCISETLINKPOL: |
e4e8e37c MH |
774 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
775 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); | |
1da177e4 LT |
776 | break; |
777 | ||
778 | case HCISETLINKMODE: | |
e4e8e37c MH |
779 | hdev->link_mode = ((__u16) dr.dev_opt) & |
780 | (HCI_LM_MASTER | HCI_LM_ACCEPT); | |
781 | break; | |
782 | ||
783 | case HCISETPTYPE: | |
784 | hdev->pkt_type = (__u16) dr.dev_opt; | |
1da177e4 LT |
785 | break; |
786 | ||
787 | case HCISETACLMTU: | |
e4e8e37c MH |
788 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
789 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
790 | break; |
791 | ||
792 | case HCISETSCOMTU: | |
e4e8e37c MH |
793 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
794 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); | |
1da177e4 LT |
795 | break; |
796 | ||
797 | default: | |
798 | err = -EINVAL; | |
799 | break; | |
800 | } | |
e4e8e37c | 801 | |
1da177e4 LT |
802 | hci_dev_put(hdev); |
803 | return err; | |
804 | } | |
805 | ||
806 | int hci_get_dev_list(void __user *arg) | |
807 | { | |
8035ded4 | 808 | struct hci_dev *hdev; |
1da177e4 LT |
809 | struct hci_dev_list_req *dl; |
810 | struct hci_dev_req *dr; | |
1da177e4 LT |
811 | int n = 0, size, err; |
812 | __u16 dev_num; | |
813 | ||
814 | if (get_user(dev_num, (__u16 __user *) arg)) | |
815 | return -EFAULT; | |
816 | ||
817 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) | |
818 | return -EINVAL; | |
819 | ||
820 | size = sizeof(*dl) + dev_num * sizeof(*dr); | |
821 | ||
70f23020 AE |
822 | dl = kzalloc(size, GFP_KERNEL); |
823 | if (!dl) | |
1da177e4 LT |
824 | return -ENOMEM; |
825 | ||
826 | dr = dl->dev_req; | |
827 | ||
828 | read_lock_bh(&hci_dev_list_lock); | |
8035ded4 | 829 | list_for_each_entry(hdev, &hci_dev_list, list) { |
3243553f JH |
830 | if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->flags)) |
831 | cancel_delayed_work_sync(&hdev->power_off); | |
c542a06c JH |
832 | |
833 | if (!test_bit(HCI_MGMT, &hdev->flags)) | |
834 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
835 | ||
1da177e4 LT |
836 | (dr + n)->dev_id = hdev->id; |
837 | (dr + n)->dev_opt = hdev->flags; | |
c542a06c | 838 | |
1da177e4 LT |
839 | if (++n >= dev_num) |
840 | break; | |
841 | } | |
842 | read_unlock_bh(&hci_dev_list_lock); | |
843 | ||
844 | dl->dev_num = n; | |
845 | size = sizeof(*dl) + n * sizeof(*dr); | |
846 | ||
847 | err = copy_to_user(arg, dl, size); | |
848 | kfree(dl); | |
849 | ||
850 | return err ? -EFAULT : 0; | |
851 | } | |
852 | ||
853 | int hci_get_dev_info(void __user *arg) | |
854 | { | |
855 | struct hci_dev *hdev; | |
856 | struct hci_dev_info di; | |
857 | int err = 0; | |
858 | ||
859 | if (copy_from_user(&di, arg, sizeof(di))) | |
860 | return -EFAULT; | |
861 | ||
70f23020 AE |
862 | hdev = hci_dev_get(di.dev_id); |
863 | if (!hdev) | |
1da177e4 LT |
864 | return -ENODEV; |
865 | ||
3243553f JH |
866 | if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->flags)) |
867 | cancel_delayed_work_sync(&hdev->power_off); | |
ab81cbf9 | 868 | |
c542a06c JH |
869 | if (!test_bit(HCI_MGMT, &hdev->flags)) |
870 | set_bit(HCI_PAIRABLE, &hdev->flags); | |
871 | ||
1da177e4 LT |
872 | strcpy(di.name, hdev->name); |
873 | di.bdaddr = hdev->bdaddr; | |
943da25d | 874 | di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4); |
1da177e4 LT |
875 | di.flags = hdev->flags; |
876 | di.pkt_type = hdev->pkt_type; | |
877 | di.acl_mtu = hdev->acl_mtu; | |
878 | di.acl_pkts = hdev->acl_pkts; | |
879 | di.sco_mtu = hdev->sco_mtu; | |
880 | di.sco_pkts = hdev->sco_pkts; | |
881 | di.link_policy = hdev->link_policy; | |
882 | di.link_mode = hdev->link_mode; | |
883 | ||
884 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); | |
885 | memcpy(&di.features, &hdev->features, sizeof(di.features)); | |
886 | ||
887 | if (copy_to_user(arg, &di, sizeof(di))) | |
888 | err = -EFAULT; | |
889 | ||
890 | hci_dev_put(hdev); | |
891 | ||
892 | return err; | |
893 | } | |
894 | ||
895 | /* ---- Interface to HCI drivers ---- */ | |
896 | ||
611b30f7 MH |
897 | static int hci_rfkill_set_block(void *data, bool blocked) |
898 | { | |
899 | struct hci_dev *hdev = data; | |
900 | ||
901 | BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); | |
902 | ||
903 | if (!blocked) | |
904 | return 0; | |
905 | ||
906 | hci_dev_do_close(hdev); | |
907 | ||
908 | return 0; | |
909 | } | |
910 | ||
911 | static const struct rfkill_ops hci_rfkill_ops = { | |
912 | .set_block = hci_rfkill_set_block, | |
913 | }; | |
914 | ||
1da177e4 LT |
915 | /* Alloc HCI device */ |
916 | struct hci_dev *hci_alloc_dev(void) | |
917 | { | |
918 | struct hci_dev *hdev; | |
919 | ||
25ea6db0 | 920 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
1da177e4 LT |
921 | if (!hdev) |
922 | return NULL; | |
923 | ||
0ac7e700 | 924 | hci_init_sysfs(hdev); |
1da177e4 LT |
925 | skb_queue_head_init(&hdev->driver_init); |
926 | ||
927 | return hdev; | |
928 | } | |
929 | EXPORT_SYMBOL(hci_alloc_dev); | |
930 | ||
931 | /* Free HCI device */ | |
932 | void hci_free_dev(struct hci_dev *hdev) | |
933 | { | |
934 | skb_queue_purge(&hdev->driver_init); | |
935 | ||
a91f2e39 MH |
936 | /* will free via device release */ |
937 | put_device(&hdev->dev); | |
1da177e4 LT |
938 | } |
939 | EXPORT_SYMBOL(hci_free_dev); | |
940 | ||
ab81cbf9 JH |
941 | static void hci_power_on(struct work_struct *work) |
942 | { | |
943 | struct hci_dev *hdev = container_of(work, struct hci_dev, power_on); | |
944 | ||
945 | BT_DBG("%s", hdev->name); | |
946 | ||
947 | if (hci_dev_open(hdev->id) < 0) | |
948 | return; | |
949 | ||
950 | if (test_bit(HCI_AUTO_OFF, &hdev->flags)) | |
3243553f JH |
951 | queue_delayed_work(hdev->workqueue, &hdev->power_off, |
952 | msecs_to_jiffies(AUTO_OFF_TIMEOUT)); | |
ab81cbf9 JH |
953 | |
954 | if (test_and_clear_bit(HCI_SETUP, &hdev->flags)) | |
744cf19e | 955 | mgmt_index_added(hdev); |
ab81cbf9 JH |
956 | } |
957 | ||
958 | static void hci_power_off(struct work_struct *work) | |
959 | { | |
3243553f JH |
960 | struct hci_dev *hdev = container_of(work, struct hci_dev, |
961 | power_off.work); | |
ab81cbf9 JH |
962 | |
963 | BT_DBG("%s", hdev->name); | |
964 | ||
965 | clear_bit(HCI_AUTO_OFF, &hdev->flags); | |
966 | ||
3243553f | 967 | hci_dev_close(hdev->id); |
ab81cbf9 JH |
968 | } |
969 | ||
16ab91ab JH |
970 | static void hci_discov_off(struct work_struct *work) |
971 | { | |
972 | struct hci_dev *hdev; | |
973 | u8 scan = SCAN_PAGE; | |
974 | ||
975 | hdev = container_of(work, struct hci_dev, discov_off.work); | |
976 | ||
977 | BT_DBG("%s", hdev->name); | |
978 | ||
979 | hci_dev_lock_bh(hdev); | |
980 | ||
981 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan); | |
982 | ||
983 | hdev->discov_timeout = 0; | |
984 | ||
985 | hci_dev_unlock_bh(hdev); | |
986 | } | |
987 | ||
2aeb9a1a JH |
988 | int hci_uuids_clear(struct hci_dev *hdev) |
989 | { | |
990 | struct list_head *p, *n; | |
991 | ||
992 | list_for_each_safe(p, n, &hdev->uuids) { | |
993 | struct bt_uuid *uuid; | |
994 | ||
995 | uuid = list_entry(p, struct bt_uuid, list); | |
996 | ||
997 | list_del(p); | |
998 | kfree(uuid); | |
999 | } | |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
55ed8ca1 JH |
1004 | int hci_link_keys_clear(struct hci_dev *hdev) |
1005 | { | |
1006 | struct list_head *p, *n; | |
1007 | ||
1008 | list_for_each_safe(p, n, &hdev->link_keys) { | |
1009 | struct link_key *key; | |
1010 | ||
1011 | key = list_entry(p, struct link_key, list); | |
1012 | ||
1013 | list_del(p); | |
1014 | kfree(key); | |
1015 | } | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1021 | { | |
8035ded4 | 1022 | struct link_key *k; |
55ed8ca1 | 1023 | |
8035ded4 | 1024 | list_for_each_entry(k, &hdev->link_keys, list) |
55ed8ca1 JH |
1025 | if (bacmp(bdaddr, &k->bdaddr) == 0) |
1026 | return k; | |
55ed8ca1 JH |
1027 | |
1028 | return NULL; | |
1029 | } | |
1030 | ||
d25e28ab JH |
1031 | static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn, |
1032 | u8 key_type, u8 old_key_type) | |
1033 | { | |
1034 | /* Legacy key */ | |
1035 | if (key_type < 0x03) | |
1036 | return 1; | |
1037 | ||
1038 | /* Debug keys are insecure so don't store them persistently */ | |
1039 | if (key_type == HCI_LK_DEBUG_COMBINATION) | |
1040 | return 0; | |
1041 | ||
1042 | /* Changed combination key and there's no previous one */ | |
1043 | if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff) | |
1044 | return 0; | |
1045 | ||
1046 | /* Security mode 3 case */ | |
1047 | if (!conn) | |
1048 | return 1; | |
1049 | ||
1050 | /* Neither local nor remote side had no-bonding as requirement */ | |
1051 | if (conn->auth_type > 0x01 && conn->remote_auth > 0x01) | |
1052 | return 1; | |
1053 | ||
1054 | /* Local side had dedicated bonding as requirement */ | |
1055 | if (conn->auth_type == 0x02 || conn->auth_type == 0x03) | |
1056 | return 1; | |
1057 | ||
1058 | /* Remote side had dedicated bonding as requirement */ | |
1059 | if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03) | |
1060 | return 1; | |
1061 | ||
1062 | /* If none of the above criteria match, then don't store the key | |
1063 | * persistently */ | |
1064 | return 0; | |
1065 | } | |
1066 | ||
75d262c2 VCG |
1067 | struct link_key *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8]) |
1068 | { | |
1069 | struct link_key *k; | |
1070 | ||
1071 | list_for_each_entry(k, &hdev->link_keys, list) { | |
1072 | struct key_master_id *id; | |
1073 | ||
1074 | if (k->type != HCI_LK_SMP_LTK) | |
1075 | continue; | |
1076 | ||
1077 | if (k->dlen != sizeof(*id)) | |
1078 | continue; | |
1079 | ||
1080 | id = (void *) &k->data; | |
1081 | if (id->ediv == ediv && | |
1082 | (memcmp(rand, id->rand, sizeof(id->rand)) == 0)) | |
1083 | return k; | |
1084 | } | |
1085 | ||
1086 | return NULL; | |
1087 | } | |
1088 | EXPORT_SYMBOL(hci_find_ltk); | |
1089 | ||
1090 | struct link_key *hci_find_link_key_type(struct hci_dev *hdev, | |
1091 | bdaddr_t *bdaddr, u8 type) | |
1092 | { | |
1093 | struct link_key *k; | |
1094 | ||
1095 | list_for_each_entry(k, &hdev->link_keys, list) | |
1096 | if (k->type == type && bacmp(bdaddr, &k->bdaddr) == 0) | |
1097 | return k; | |
1098 | ||
1099 | return NULL; | |
1100 | } | |
1101 | EXPORT_SYMBOL(hci_find_link_key_type); | |
1102 | ||
d25e28ab JH |
1103 | int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key, |
1104 | bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len) | |
55ed8ca1 JH |
1105 | { |
1106 | struct link_key *key, *old_key; | |
4df378a1 | 1107 | u8 old_key_type, persistent; |
55ed8ca1 JH |
1108 | |
1109 | old_key = hci_find_link_key(hdev, bdaddr); | |
1110 | if (old_key) { | |
1111 | old_key_type = old_key->type; | |
1112 | key = old_key; | |
1113 | } else { | |
12adcf3a | 1114 | old_key_type = conn ? conn->key_type : 0xff; |
55ed8ca1 JH |
1115 | key = kzalloc(sizeof(*key), GFP_ATOMIC); |
1116 | if (!key) | |
1117 | return -ENOMEM; | |
1118 | list_add(&key->list, &hdev->link_keys); | |
1119 | } | |
1120 | ||
1121 | BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type); | |
1122 | ||
d25e28ab JH |
1123 | /* Some buggy controller combinations generate a changed |
1124 | * combination key for legacy pairing even when there's no | |
1125 | * previous key */ | |
1126 | if (type == HCI_LK_CHANGED_COMBINATION && | |
1127 | (!conn || conn->remote_auth == 0xff) && | |
655fe6ec | 1128 | old_key_type == 0xff) { |
d25e28ab | 1129 | type = HCI_LK_COMBINATION; |
655fe6ec JH |
1130 | if (conn) |
1131 | conn->key_type = type; | |
1132 | } | |
d25e28ab | 1133 | |
55ed8ca1 JH |
1134 | bacpy(&key->bdaddr, bdaddr); |
1135 | memcpy(key->val, val, 16); | |
55ed8ca1 JH |
1136 | key->pin_len = pin_len; |
1137 | ||
b6020ba0 | 1138 | if (type == HCI_LK_CHANGED_COMBINATION) |
55ed8ca1 | 1139 | key->type = old_key_type; |
4748fed2 JH |
1140 | else |
1141 | key->type = type; | |
1142 | ||
4df378a1 JH |
1143 | if (!new_key) |
1144 | return 0; | |
1145 | ||
1146 | persistent = hci_persistent_key(hdev, conn, type, old_key_type); | |
1147 | ||
744cf19e | 1148 | mgmt_new_link_key(hdev, key, persistent); |
4df378a1 JH |
1149 | |
1150 | if (!persistent) { | |
1151 | list_del(&key->list); | |
1152 | kfree(key); | |
1153 | } | |
55ed8ca1 JH |
1154 | |
1155 | return 0; | |
1156 | } | |
1157 | ||
75d262c2 | 1158 | int hci_add_ltk(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr, |
726b4ffc | 1159 | u8 key_size, __le16 ediv, u8 rand[8], u8 ltk[16]) |
75d262c2 VCG |
1160 | { |
1161 | struct link_key *key, *old_key; | |
1162 | struct key_master_id *id; | |
1163 | u8 old_key_type; | |
1164 | ||
1165 | BT_DBG("%s addr %s", hdev->name, batostr(bdaddr)); | |
1166 | ||
1167 | old_key = hci_find_link_key_type(hdev, bdaddr, HCI_LK_SMP_LTK); | |
1168 | if (old_key) { | |
1169 | key = old_key; | |
1170 | old_key_type = old_key->type; | |
1171 | } else { | |
1172 | key = kzalloc(sizeof(*key) + sizeof(*id), GFP_ATOMIC); | |
1173 | if (!key) | |
1174 | return -ENOMEM; | |
1175 | list_add(&key->list, &hdev->link_keys); | |
1176 | old_key_type = 0xff; | |
1177 | } | |
1178 | ||
1179 | key->dlen = sizeof(*id); | |
1180 | ||
1181 | bacpy(&key->bdaddr, bdaddr); | |
1182 | memcpy(key->val, ltk, sizeof(key->val)); | |
1183 | key->type = HCI_LK_SMP_LTK; | |
726b4ffc | 1184 | key->pin_len = key_size; |
75d262c2 VCG |
1185 | |
1186 | id = (void *) &key->data; | |
1187 | id->ediv = ediv; | |
1188 | memcpy(id->rand, rand, sizeof(id->rand)); | |
1189 | ||
1190 | if (new_key) | |
744cf19e | 1191 | mgmt_new_link_key(hdev, key, old_key_type); |
75d262c2 VCG |
1192 | |
1193 | return 0; | |
1194 | } | |
1195 | ||
55ed8ca1 JH |
1196 | int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1197 | { | |
1198 | struct link_key *key; | |
1199 | ||
1200 | key = hci_find_link_key(hdev, bdaddr); | |
1201 | if (!key) | |
1202 | return -ENOENT; | |
1203 | ||
1204 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1205 | ||
1206 | list_del(&key->list); | |
1207 | kfree(key); | |
1208 | ||
1209 | return 0; | |
1210 | } | |
1211 | ||
6bd32326 VT |
1212 | /* HCI command timer function */ |
1213 | static void hci_cmd_timer(unsigned long arg) | |
1214 | { | |
1215 | struct hci_dev *hdev = (void *) arg; | |
1216 | ||
1217 | BT_ERR("%s command tx timeout", hdev->name); | |
1218 | atomic_set(&hdev->cmd_cnt, 1); | |
1219 | tasklet_schedule(&hdev->cmd_task); | |
1220 | } | |
1221 | ||
2763eda6 SJ |
1222 | struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev, |
1223 | bdaddr_t *bdaddr) | |
1224 | { | |
1225 | struct oob_data *data; | |
1226 | ||
1227 | list_for_each_entry(data, &hdev->remote_oob_data, list) | |
1228 | if (bacmp(bdaddr, &data->bdaddr) == 0) | |
1229 | return data; | |
1230 | ||
1231 | return NULL; | |
1232 | } | |
1233 | ||
1234 | int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1235 | { | |
1236 | struct oob_data *data; | |
1237 | ||
1238 | data = hci_find_remote_oob_data(hdev, bdaddr); | |
1239 | if (!data) | |
1240 | return -ENOENT; | |
1241 | ||
1242 | BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); | |
1243 | ||
1244 | list_del(&data->list); | |
1245 | kfree(data); | |
1246 | ||
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | int hci_remote_oob_data_clear(struct hci_dev *hdev) | |
1251 | { | |
1252 | struct oob_data *data, *n; | |
1253 | ||
1254 | list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) { | |
1255 | list_del(&data->list); | |
1256 | kfree(data); | |
1257 | } | |
1258 | ||
1259 | return 0; | |
1260 | } | |
1261 | ||
1262 | int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash, | |
1263 | u8 *randomizer) | |
1264 | { | |
1265 | struct oob_data *data; | |
1266 | ||
1267 | data = hci_find_remote_oob_data(hdev, bdaddr); | |
1268 | ||
1269 | if (!data) { | |
1270 | data = kmalloc(sizeof(*data), GFP_ATOMIC); | |
1271 | if (!data) | |
1272 | return -ENOMEM; | |
1273 | ||
1274 | bacpy(&data->bdaddr, bdaddr); | |
1275 | list_add(&data->list, &hdev->remote_oob_data); | |
1276 | } | |
1277 | ||
1278 | memcpy(data->hash, hash, sizeof(data->hash)); | |
1279 | memcpy(data->randomizer, randomizer, sizeof(data->randomizer)); | |
1280 | ||
1281 | BT_DBG("%s for %s", hdev->name, batostr(bdaddr)); | |
1282 | ||
1283 | return 0; | |
1284 | } | |
1285 | ||
b2a66aad AJ |
1286 | struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, |
1287 | bdaddr_t *bdaddr) | |
1288 | { | |
8035ded4 | 1289 | struct bdaddr_list *b; |
b2a66aad | 1290 | |
8035ded4 | 1291 | list_for_each_entry(b, &hdev->blacklist, list) |
b2a66aad AJ |
1292 | if (bacmp(bdaddr, &b->bdaddr) == 0) |
1293 | return b; | |
b2a66aad AJ |
1294 | |
1295 | return NULL; | |
1296 | } | |
1297 | ||
1298 | int hci_blacklist_clear(struct hci_dev *hdev) | |
1299 | { | |
1300 | struct list_head *p, *n; | |
1301 | ||
1302 | list_for_each_safe(p, n, &hdev->blacklist) { | |
1303 | struct bdaddr_list *b; | |
1304 | ||
1305 | b = list_entry(p, struct bdaddr_list, list); | |
1306 | ||
1307 | list_del(p); | |
1308 | kfree(b); | |
1309 | } | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1315 | { | |
1316 | struct bdaddr_list *entry; | |
b2a66aad AJ |
1317 | |
1318 | if (bacmp(bdaddr, BDADDR_ANY) == 0) | |
1319 | return -EBADF; | |
1320 | ||
5e762444 AJ |
1321 | if (hci_blacklist_lookup(hdev, bdaddr)) |
1322 | return -EEXIST; | |
b2a66aad AJ |
1323 | |
1324 | entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL); | |
5e762444 AJ |
1325 | if (!entry) |
1326 | return -ENOMEM; | |
b2a66aad AJ |
1327 | |
1328 | bacpy(&entry->bdaddr, bdaddr); | |
1329 | ||
1330 | list_add(&entry->list, &hdev->blacklist); | |
1331 | ||
744cf19e | 1332 | return mgmt_device_blocked(hdev, bdaddr); |
b2a66aad AJ |
1333 | } |
1334 | ||
1335 | int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1336 | { | |
1337 | struct bdaddr_list *entry; | |
b2a66aad | 1338 | |
a7925bd2 | 1339 | if (bacmp(bdaddr, BDADDR_ANY) == 0) { |
5e762444 | 1340 | return hci_blacklist_clear(hdev); |
a7925bd2 | 1341 | } |
b2a66aad AJ |
1342 | |
1343 | entry = hci_blacklist_lookup(hdev, bdaddr); | |
a7925bd2 | 1344 | if (!entry) { |
5e762444 | 1345 | return -ENOENT; |
a7925bd2 | 1346 | } |
b2a66aad AJ |
1347 | |
1348 | list_del(&entry->list); | |
1349 | kfree(entry); | |
1350 | ||
744cf19e | 1351 | return mgmt_device_unblocked(hdev, bdaddr); |
b2a66aad AJ |
1352 | } |
1353 | ||
35815085 AG |
1354 | static void hci_clear_adv_cache(unsigned long arg) |
1355 | { | |
1356 | struct hci_dev *hdev = (void *) arg; | |
1357 | ||
1358 | hci_dev_lock(hdev); | |
1359 | ||
1360 | hci_adv_entries_clear(hdev); | |
1361 | ||
1362 | hci_dev_unlock(hdev); | |
1363 | } | |
1364 | ||
76c8686f AG |
1365 | int hci_adv_entries_clear(struct hci_dev *hdev) |
1366 | { | |
1367 | struct adv_entry *entry, *tmp; | |
1368 | ||
1369 | list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) { | |
1370 | list_del(&entry->list); | |
1371 | kfree(entry); | |
1372 | } | |
1373 | ||
1374 | BT_DBG("%s adv cache cleared", hdev->name); | |
1375 | ||
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr) | |
1380 | { | |
1381 | struct adv_entry *entry; | |
1382 | ||
1383 | list_for_each_entry(entry, &hdev->adv_entries, list) | |
1384 | if (bacmp(bdaddr, &entry->bdaddr) == 0) | |
1385 | return entry; | |
1386 | ||
1387 | return NULL; | |
1388 | } | |
1389 | ||
1390 | static inline int is_connectable_adv(u8 evt_type) | |
1391 | { | |
1392 | if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND) | |
1393 | return 1; | |
1394 | ||
1395 | return 0; | |
1396 | } | |
1397 | ||
1398 | int hci_add_adv_entry(struct hci_dev *hdev, | |
1399 | struct hci_ev_le_advertising_info *ev) | |
1400 | { | |
1401 | struct adv_entry *entry; | |
1402 | ||
1403 | if (!is_connectable_adv(ev->evt_type)) | |
1404 | return -EINVAL; | |
1405 | ||
1406 | /* Only new entries should be added to adv_entries. So, if | |
1407 | * bdaddr was found, don't add it. */ | |
1408 | if (hci_find_adv_entry(hdev, &ev->bdaddr)) | |
1409 | return 0; | |
1410 | ||
1411 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); | |
1412 | if (!entry) | |
1413 | return -ENOMEM; | |
1414 | ||
1415 | bacpy(&entry->bdaddr, &ev->bdaddr); | |
1416 | entry->bdaddr_type = ev->bdaddr_type; | |
1417 | ||
1418 | list_add(&entry->list, &hdev->adv_entries); | |
1419 | ||
1420 | BT_DBG("%s adv entry added: address %s type %u", hdev->name, | |
1421 | batostr(&entry->bdaddr), entry->bdaddr_type); | |
1422 | ||
1423 | return 0; | |
1424 | } | |
1425 | ||
1da177e4 LT |
1426 | /* Register HCI device */ |
1427 | int hci_register_dev(struct hci_dev *hdev) | |
1428 | { | |
1429 | struct list_head *head = &hci_dev_list, *p; | |
08add513 | 1430 | int i, id, error; |
1da177e4 | 1431 | |
c13854ce MH |
1432 | BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name, |
1433 | hdev->bus, hdev->owner); | |
1da177e4 LT |
1434 | |
1435 | if (!hdev->open || !hdev->close || !hdev->destruct) | |
1436 | return -EINVAL; | |
1437 | ||
08add513 MM |
1438 | /* Do not allow HCI_AMP devices to register at index 0, |
1439 | * so the index can be used as the AMP controller ID. | |
1440 | */ | |
1441 | id = (hdev->dev_type == HCI_BREDR) ? 0 : 1; | |
1442 | ||
1da177e4 LT |
1443 | write_lock_bh(&hci_dev_list_lock); |
1444 | ||
1445 | /* Find first available device id */ | |
1446 | list_for_each(p, &hci_dev_list) { | |
1447 | if (list_entry(p, struct hci_dev, list)->id != id) | |
1448 | break; | |
1449 | head = p; id++; | |
1450 | } | |
8e87d142 | 1451 | |
1da177e4 LT |
1452 | sprintf(hdev->name, "hci%d", id); |
1453 | hdev->id = id; | |
1454 | list_add(&hdev->list, head); | |
1455 | ||
1456 | atomic_set(&hdev->refcnt, 1); | |
1457 | spin_lock_init(&hdev->lock); | |
1458 | ||
1459 | hdev->flags = 0; | |
1460 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); | |
5b7f9909 | 1461 | hdev->esco_type = (ESCO_HV1); |
1da177e4 | 1462 | hdev->link_mode = (HCI_LM_ACCEPT); |
17fa4b9d | 1463 | hdev->io_capability = 0x03; /* No Input No Output */ |
1da177e4 | 1464 | |
04837f64 MH |
1465 | hdev->idle_timeout = 0; |
1466 | hdev->sniff_max_interval = 800; | |
1467 | hdev->sniff_min_interval = 80; | |
1468 | ||
70f23020 | 1469 | tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev); |
1da177e4 LT |
1470 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); |
1471 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); | |
1472 | ||
1473 | skb_queue_head_init(&hdev->rx_q); | |
1474 | skb_queue_head_init(&hdev->cmd_q); | |
1475 | skb_queue_head_init(&hdev->raw_q); | |
1476 | ||
6bd32326 VT |
1477 | setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev); |
1478 | ||
cd4c5391 | 1479 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1480 | hdev->reassembly[i] = NULL; |
1481 | ||
1da177e4 | 1482 | init_waitqueue_head(&hdev->req_wait_q); |
a6a67efd | 1483 | mutex_init(&hdev->req_lock); |
1da177e4 LT |
1484 | |
1485 | inquiry_cache_init(hdev); | |
1486 | ||
1487 | hci_conn_hash_init(hdev); | |
1488 | ||
2e58ef3e JH |
1489 | INIT_LIST_HEAD(&hdev->mgmt_pending); |
1490 | ||
ea4bd8ba | 1491 | INIT_LIST_HEAD(&hdev->blacklist); |
f0358568 | 1492 | |
2aeb9a1a JH |
1493 | INIT_LIST_HEAD(&hdev->uuids); |
1494 | ||
55ed8ca1 JH |
1495 | INIT_LIST_HEAD(&hdev->link_keys); |
1496 | ||
2763eda6 SJ |
1497 | INIT_LIST_HEAD(&hdev->remote_oob_data); |
1498 | ||
76c8686f | 1499 | INIT_LIST_HEAD(&hdev->adv_entries); |
35815085 AG |
1500 | setup_timer(&hdev->adv_timer, hci_clear_adv_cache, |
1501 | (unsigned long) hdev); | |
76c8686f | 1502 | |
ab81cbf9 | 1503 | INIT_WORK(&hdev->power_on, hci_power_on); |
3243553f | 1504 | INIT_DELAYED_WORK(&hdev->power_off, hci_power_off); |
ab81cbf9 | 1505 | |
16ab91ab JH |
1506 | INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off); |
1507 | ||
1da177e4 LT |
1508 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
1509 | ||
1510 | atomic_set(&hdev->promisc, 0); | |
1511 | ||
1512 | write_unlock_bh(&hci_dev_list_lock); | |
1513 | ||
f48fd9c8 | 1514 | hdev->workqueue = create_singlethread_workqueue(hdev->name); |
33ca954d DH |
1515 | if (!hdev->workqueue) { |
1516 | error = -ENOMEM; | |
1517 | goto err; | |
1518 | } | |
f48fd9c8 | 1519 | |
33ca954d DH |
1520 | error = hci_add_sysfs(hdev); |
1521 | if (error < 0) | |
1522 | goto err_wqueue; | |
1da177e4 | 1523 | |
611b30f7 MH |
1524 | hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
1525 | RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev); | |
1526 | if (hdev->rfkill) { | |
1527 | if (rfkill_register(hdev->rfkill) < 0) { | |
1528 | rfkill_destroy(hdev->rfkill); | |
1529 | hdev->rfkill = NULL; | |
1530 | } | |
1531 | } | |
1532 | ||
ab81cbf9 JH |
1533 | set_bit(HCI_AUTO_OFF, &hdev->flags); |
1534 | set_bit(HCI_SETUP, &hdev->flags); | |
1535 | queue_work(hdev->workqueue, &hdev->power_on); | |
1536 | ||
1da177e4 LT |
1537 | hci_notify(hdev, HCI_DEV_REG); |
1538 | ||
1539 | return id; | |
f48fd9c8 | 1540 | |
33ca954d DH |
1541 | err_wqueue: |
1542 | destroy_workqueue(hdev->workqueue); | |
1543 | err: | |
f48fd9c8 MH |
1544 | write_lock_bh(&hci_dev_list_lock); |
1545 | list_del(&hdev->list); | |
1546 | write_unlock_bh(&hci_dev_list_lock); | |
1547 | ||
33ca954d | 1548 | return error; |
1da177e4 LT |
1549 | } |
1550 | EXPORT_SYMBOL(hci_register_dev); | |
1551 | ||
1552 | /* Unregister HCI device */ | |
59735631 | 1553 | void hci_unregister_dev(struct hci_dev *hdev) |
1da177e4 | 1554 | { |
ef222013 MH |
1555 | int i; |
1556 | ||
c13854ce | 1557 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
1da177e4 | 1558 | |
1da177e4 LT |
1559 | write_lock_bh(&hci_dev_list_lock); |
1560 | list_del(&hdev->list); | |
1561 | write_unlock_bh(&hci_dev_list_lock); | |
1562 | ||
1563 | hci_dev_do_close(hdev); | |
1564 | ||
cd4c5391 | 1565 | for (i = 0; i < NUM_REASSEMBLY; i++) |
ef222013 MH |
1566 | kfree_skb(hdev->reassembly[i]); |
1567 | ||
ab81cbf9 | 1568 | if (!test_bit(HCI_INIT, &hdev->flags) && |
56e5cb86 JH |
1569 | !test_bit(HCI_SETUP, &hdev->flags)) { |
1570 | hci_dev_lock_bh(hdev); | |
744cf19e | 1571 | mgmt_index_removed(hdev); |
56e5cb86 JH |
1572 | hci_dev_unlock_bh(hdev); |
1573 | } | |
ab81cbf9 | 1574 | |
2e58ef3e JH |
1575 | /* mgmt_index_removed should take care of emptying the |
1576 | * pending list */ | |
1577 | BUG_ON(!list_empty(&hdev->mgmt_pending)); | |
1578 | ||
1da177e4 LT |
1579 | hci_notify(hdev, HCI_DEV_UNREG); |
1580 | ||
611b30f7 MH |
1581 | if (hdev->rfkill) { |
1582 | rfkill_unregister(hdev->rfkill); | |
1583 | rfkill_destroy(hdev->rfkill); | |
1584 | } | |
1585 | ||
ce242970 | 1586 | hci_del_sysfs(hdev); |
147e2d59 | 1587 | |
35815085 | 1588 | del_timer(&hdev->adv_timer); |
c6f3c5f7 | 1589 | |
f48fd9c8 MH |
1590 | destroy_workqueue(hdev->workqueue); |
1591 | ||
e2e0cacb JH |
1592 | hci_dev_lock_bh(hdev); |
1593 | hci_blacklist_clear(hdev); | |
2aeb9a1a | 1594 | hci_uuids_clear(hdev); |
55ed8ca1 | 1595 | hci_link_keys_clear(hdev); |
2763eda6 | 1596 | hci_remote_oob_data_clear(hdev); |
76c8686f | 1597 | hci_adv_entries_clear(hdev); |
e2e0cacb JH |
1598 | hci_dev_unlock_bh(hdev); |
1599 | ||
1da177e4 | 1600 | __hci_dev_put(hdev); |
1da177e4 LT |
1601 | } |
1602 | EXPORT_SYMBOL(hci_unregister_dev); | |
1603 | ||
1604 | /* Suspend HCI device */ | |
1605 | int hci_suspend_dev(struct hci_dev *hdev) | |
1606 | { | |
1607 | hci_notify(hdev, HCI_DEV_SUSPEND); | |
1608 | return 0; | |
1609 | } | |
1610 | EXPORT_SYMBOL(hci_suspend_dev); | |
1611 | ||
1612 | /* Resume HCI device */ | |
1613 | int hci_resume_dev(struct hci_dev *hdev) | |
1614 | { | |
1615 | hci_notify(hdev, HCI_DEV_RESUME); | |
1616 | return 0; | |
1617 | } | |
1618 | EXPORT_SYMBOL(hci_resume_dev); | |
1619 | ||
76bca880 MH |
1620 | /* Receive frame from HCI drivers */ |
1621 | int hci_recv_frame(struct sk_buff *skb) | |
1622 | { | |
1623 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1624 | if (!hdev || (!test_bit(HCI_UP, &hdev->flags) | |
1625 | && !test_bit(HCI_INIT, &hdev->flags))) { | |
1626 | kfree_skb(skb); | |
1627 | return -ENXIO; | |
1628 | } | |
1629 | ||
1630 | /* Incomming skb */ | |
1631 | bt_cb(skb)->incoming = 1; | |
1632 | ||
1633 | /* Time stamp */ | |
1634 | __net_timestamp(skb); | |
1635 | ||
1636 | /* Queue frame for rx task */ | |
1637 | skb_queue_tail(&hdev->rx_q, skb); | |
c78ae283 MH |
1638 | tasklet_schedule(&hdev->rx_task); |
1639 | ||
76bca880 MH |
1640 | return 0; |
1641 | } | |
1642 | EXPORT_SYMBOL(hci_recv_frame); | |
1643 | ||
33e882a5 | 1644 | static int hci_reassembly(struct hci_dev *hdev, int type, void *data, |
1e429f38 | 1645 | int count, __u8 index) |
33e882a5 SS |
1646 | { |
1647 | int len = 0; | |
1648 | int hlen = 0; | |
1649 | int remain = count; | |
1650 | struct sk_buff *skb; | |
1651 | struct bt_skb_cb *scb; | |
1652 | ||
1653 | if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) || | |
1654 | index >= NUM_REASSEMBLY) | |
1655 | return -EILSEQ; | |
1656 | ||
1657 | skb = hdev->reassembly[index]; | |
1658 | ||
1659 | if (!skb) { | |
1660 | switch (type) { | |
1661 | case HCI_ACLDATA_PKT: | |
1662 | len = HCI_MAX_FRAME_SIZE; | |
1663 | hlen = HCI_ACL_HDR_SIZE; | |
1664 | break; | |
1665 | case HCI_EVENT_PKT: | |
1666 | len = HCI_MAX_EVENT_SIZE; | |
1667 | hlen = HCI_EVENT_HDR_SIZE; | |
1668 | break; | |
1669 | case HCI_SCODATA_PKT: | |
1670 | len = HCI_MAX_SCO_SIZE; | |
1671 | hlen = HCI_SCO_HDR_SIZE; | |
1672 | break; | |
1673 | } | |
1674 | ||
1e429f38 | 1675 | skb = bt_skb_alloc(len, GFP_ATOMIC); |
33e882a5 SS |
1676 | if (!skb) |
1677 | return -ENOMEM; | |
1678 | ||
1679 | scb = (void *) skb->cb; | |
1680 | scb->expect = hlen; | |
1681 | scb->pkt_type = type; | |
1682 | ||
1683 | skb->dev = (void *) hdev; | |
1684 | hdev->reassembly[index] = skb; | |
1685 | } | |
1686 | ||
1687 | while (count) { | |
1688 | scb = (void *) skb->cb; | |
1689 | len = min(scb->expect, (__u16)count); | |
1690 | ||
1691 | memcpy(skb_put(skb, len), data, len); | |
1692 | ||
1693 | count -= len; | |
1694 | data += len; | |
1695 | scb->expect -= len; | |
1696 | remain = count; | |
1697 | ||
1698 | switch (type) { | |
1699 | case HCI_EVENT_PKT: | |
1700 | if (skb->len == HCI_EVENT_HDR_SIZE) { | |
1701 | struct hci_event_hdr *h = hci_event_hdr(skb); | |
1702 | scb->expect = h->plen; | |
1703 | ||
1704 | if (skb_tailroom(skb) < scb->expect) { | |
1705 | kfree_skb(skb); | |
1706 | hdev->reassembly[index] = NULL; | |
1707 | return -ENOMEM; | |
1708 | } | |
1709 | } | |
1710 | break; | |
1711 | ||
1712 | case HCI_ACLDATA_PKT: | |
1713 | if (skb->len == HCI_ACL_HDR_SIZE) { | |
1714 | struct hci_acl_hdr *h = hci_acl_hdr(skb); | |
1715 | scb->expect = __le16_to_cpu(h->dlen); | |
1716 | ||
1717 | if (skb_tailroom(skb) < scb->expect) { | |
1718 | kfree_skb(skb); | |
1719 | hdev->reassembly[index] = NULL; | |
1720 | return -ENOMEM; | |
1721 | } | |
1722 | } | |
1723 | break; | |
1724 | ||
1725 | case HCI_SCODATA_PKT: | |
1726 | if (skb->len == HCI_SCO_HDR_SIZE) { | |
1727 | struct hci_sco_hdr *h = hci_sco_hdr(skb); | |
1728 | scb->expect = h->dlen; | |
1729 | ||
1730 | if (skb_tailroom(skb) < scb->expect) { | |
1731 | kfree_skb(skb); | |
1732 | hdev->reassembly[index] = NULL; | |
1733 | return -ENOMEM; | |
1734 | } | |
1735 | } | |
1736 | break; | |
1737 | } | |
1738 | ||
1739 | if (scb->expect == 0) { | |
1740 | /* Complete frame */ | |
1741 | ||
1742 | bt_cb(skb)->pkt_type = type; | |
1743 | hci_recv_frame(skb); | |
1744 | ||
1745 | hdev->reassembly[index] = NULL; | |
1746 | return remain; | |
1747 | } | |
1748 | } | |
1749 | ||
1750 | return remain; | |
1751 | } | |
1752 | ||
ef222013 MH |
1753 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) |
1754 | { | |
f39a3c06 SS |
1755 | int rem = 0; |
1756 | ||
ef222013 MH |
1757 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) |
1758 | return -EILSEQ; | |
1759 | ||
da5f6c37 | 1760 | while (count) { |
1e429f38 | 1761 | rem = hci_reassembly(hdev, type, data, count, type - 1); |
f39a3c06 SS |
1762 | if (rem < 0) |
1763 | return rem; | |
ef222013 | 1764 | |
f39a3c06 SS |
1765 | data += (count - rem); |
1766 | count = rem; | |
f81c6224 | 1767 | } |
ef222013 | 1768 | |
f39a3c06 | 1769 | return rem; |
ef222013 MH |
1770 | } |
1771 | EXPORT_SYMBOL(hci_recv_fragment); | |
1772 | ||
99811510 SS |
1773 | #define STREAM_REASSEMBLY 0 |
1774 | ||
1775 | int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count) | |
1776 | { | |
1777 | int type; | |
1778 | int rem = 0; | |
1779 | ||
da5f6c37 | 1780 | while (count) { |
99811510 SS |
1781 | struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY]; |
1782 | ||
1783 | if (!skb) { | |
1784 | struct { char type; } *pkt; | |
1785 | ||
1786 | /* Start of the frame */ | |
1787 | pkt = data; | |
1788 | type = pkt->type; | |
1789 | ||
1790 | data++; | |
1791 | count--; | |
1792 | } else | |
1793 | type = bt_cb(skb)->pkt_type; | |
1794 | ||
1e429f38 GP |
1795 | rem = hci_reassembly(hdev, type, data, count, |
1796 | STREAM_REASSEMBLY); | |
99811510 SS |
1797 | if (rem < 0) |
1798 | return rem; | |
1799 | ||
1800 | data += (count - rem); | |
1801 | count = rem; | |
f81c6224 | 1802 | } |
99811510 SS |
1803 | |
1804 | return rem; | |
1805 | } | |
1806 | EXPORT_SYMBOL(hci_recv_stream_fragment); | |
1807 | ||
1da177e4 LT |
1808 | /* ---- Interface to upper protocols ---- */ |
1809 | ||
1810 | /* Register/Unregister protocols. | |
1811 | * hci_task_lock is used to ensure that no tasks are running. */ | |
1812 | int hci_register_proto(struct hci_proto *hp) | |
1813 | { | |
1814 | int err = 0; | |
1815 | ||
1816 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1817 | ||
1818 | if (hp->id >= HCI_MAX_PROTO) | |
1819 | return -EINVAL; | |
1820 | ||
1821 | write_lock_bh(&hci_task_lock); | |
1822 | ||
1823 | if (!hci_proto[hp->id]) | |
1824 | hci_proto[hp->id] = hp; | |
1825 | else | |
1826 | err = -EEXIST; | |
1827 | ||
1828 | write_unlock_bh(&hci_task_lock); | |
1829 | ||
1830 | return err; | |
1831 | } | |
1832 | EXPORT_SYMBOL(hci_register_proto); | |
1833 | ||
1834 | int hci_unregister_proto(struct hci_proto *hp) | |
1835 | { | |
1836 | int err = 0; | |
1837 | ||
1838 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); | |
1839 | ||
1840 | if (hp->id >= HCI_MAX_PROTO) | |
1841 | return -EINVAL; | |
1842 | ||
1843 | write_lock_bh(&hci_task_lock); | |
1844 | ||
1845 | if (hci_proto[hp->id]) | |
1846 | hci_proto[hp->id] = NULL; | |
1847 | else | |
1848 | err = -ENOENT; | |
1849 | ||
1850 | write_unlock_bh(&hci_task_lock); | |
1851 | ||
1852 | return err; | |
1853 | } | |
1854 | EXPORT_SYMBOL(hci_unregister_proto); | |
1855 | ||
1856 | int hci_register_cb(struct hci_cb *cb) | |
1857 | { | |
1858 | BT_DBG("%p name %s", cb, cb->name); | |
1859 | ||
1860 | write_lock_bh(&hci_cb_list_lock); | |
1861 | list_add(&cb->list, &hci_cb_list); | |
1862 | write_unlock_bh(&hci_cb_list_lock); | |
1863 | ||
1864 | return 0; | |
1865 | } | |
1866 | EXPORT_SYMBOL(hci_register_cb); | |
1867 | ||
1868 | int hci_unregister_cb(struct hci_cb *cb) | |
1869 | { | |
1870 | BT_DBG("%p name %s", cb, cb->name); | |
1871 | ||
1872 | write_lock_bh(&hci_cb_list_lock); | |
1873 | list_del(&cb->list); | |
1874 | write_unlock_bh(&hci_cb_list_lock); | |
1875 | ||
1876 | return 0; | |
1877 | } | |
1878 | EXPORT_SYMBOL(hci_unregister_cb); | |
1879 | ||
1880 | static int hci_send_frame(struct sk_buff *skb) | |
1881 | { | |
1882 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; | |
1883 | ||
1884 | if (!hdev) { | |
1885 | kfree_skb(skb); | |
1886 | return -ENODEV; | |
1887 | } | |
1888 | ||
0d48d939 | 1889 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
1da177e4 LT |
1890 | |
1891 | if (atomic_read(&hdev->promisc)) { | |
1892 | /* Time stamp */ | |
a61bbcf2 | 1893 | __net_timestamp(skb); |
1da177e4 | 1894 | |
eec8d2bc | 1895 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
1896 | } |
1897 | ||
1898 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1899 | skb_orphan(skb); | |
1900 | ||
1901 | return hdev->send(skb); | |
1902 | } | |
1903 | ||
1904 | /* Send HCI command */ | |
a9de9248 | 1905 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
1da177e4 LT |
1906 | { |
1907 | int len = HCI_COMMAND_HDR_SIZE + plen; | |
1908 | struct hci_command_hdr *hdr; | |
1909 | struct sk_buff *skb; | |
1910 | ||
a9de9248 | 1911 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
1da177e4 LT |
1912 | |
1913 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
1914 | if (!skb) { | |
ef222013 | 1915 | BT_ERR("%s no memory for command", hdev->name); |
1da177e4 LT |
1916 | return -ENOMEM; |
1917 | } | |
1918 | ||
1919 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); | |
a9de9248 | 1920 | hdr->opcode = cpu_to_le16(opcode); |
1da177e4 LT |
1921 | hdr->plen = plen; |
1922 | ||
1923 | if (plen) | |
1924 | memcpy(skb_put(skb, plen), param, plen); | |
1925 | ||
1926 | BT_DBG("skb len %d", skb->len); | |
1927 | ||
0d48d939 | 1928 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
1da177e4 | 1929 | skb->dev = (void *) hdev; |
c78ae283 | 1930 | |
a5040efa JH |
1931 | if (test_bit(HCI_INIT, &hdev->flags)) |
1932 | hdev->init_last_cmd = opcode; | |
1933 | ||
1da177e4 | 1934 | skb_queue_tail(&hdev->cmd_q, skb); |
c78ae283 | 1935 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
1936 | |
1937 | return 0; | |
1938 | } | |
1da177e4 LT |
1939 | |
1940 | /* Get data from the previously sent command */ | |
a9de9248 | 1941 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
1da177e4 LT |
1942 | { |
1943 | struct hci_command_hdr *hdr; | |
1944 | ||
1945 | if (!hdev->sent_cmd) | |
1946 | return NULL; | |
1947 | ||
1948 | hdr = (void *) hdev->sent_cmd->data; | |
1949 | ||
a9de9248 | 1950 | if (hdr->opcode != cpu_to_le16(opcode)) |
1da177e4 LT |
1951 | return NULL; |
1952 | ||
a9de9248 | 1953 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
1da177e4 LT |
1954 | |
1955 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; | |
1956 | } | |
1957 | ||
1958 | /* Send ACL data */ | |
1959 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) | |
1960 | { | |
1961 | struct hci_acl_hdr *hdr; | |
1962 | int len = skb->len; | |
1963 | ||
badff6d0 ACM |
1964 | skb_push(skb, HCI_ACL_HDR_SIZE); |
1965 | skb_reset_transport_header(skb); | |
9c70220b | 1966 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
aca3192c YH |
1967 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
1968 | hdr->dlen = cpu_to_le16(len); | |
1da177e4 LT |
1969 | } |
1970 | ||
73d80deb LAD |
1971 | static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue, |
1972 | struct sk_buff *skb, __u16 flags) | |
1da177e4 LT |
1973 | { |
1974 | struct hci_dev *hdev = conn->hdev; | |
1975 | struct sk_buff *list; | |
1976 | ||
70f23020 AE |
1977 | list = skb_shinfo(skb)->frag_list; |
1978 | if (!list) { | |
1da177e4 LT |
1979 | /* Non fragmented */ |
1980 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); | |
1981 | ||
73d80deb | 1982 | skb_queue_tail(queue, skb); |
1da177e4 LT |
1983 | } else { |
1984 | /* Fragmented */ | |
1985 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
1986 | ||
1987 | skb_shinfo(skb)->frag_list = NULL; | |
1988 | ||
1989 | /* Queue all fragments atomically */ | |
73d80deb | 1990 | spin_lock_bh(&queue->lock); |
1da177e4 | 1991 | |
73d80deb | 1992 | __skb_queue_tail(queue, skb); |
e702112f AE |
1993 | |
1994 | flags &= ~ACL_START; | |
1995 | flags |= ACL_CONT; | |
1da177e4 LT |
1996 | do { |
1997 | skb = list; list = list->next; | |
8e87d142 | 1998 | |
1da177e4 | 1999 | skb->dev = (void *) hdev; |
0d48d939 | 2000 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
e702112f | 2001 | hci_add_acl_hdr(skb, conn->handle, flags); |
1da177e4 LT |
2002 | |
2003 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); | |
2004 | ||
73d80deb | 2005 | __skb_queue_tail(queue, skb); |
1da177e4 LT |
2006 | } while (list); |
2007 | ||
73d80deb | 2008 | spin_unlock_bh(&queue->lock); |
1da177e4 | 2009 | } |
73d80deb LAD |
2010 | } |
2011 | ||
2012 | void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags) | |
2013 | { | |
2014 | struct hci_conn *conn = chan->conn; | |
2015 | struct hci_dev *hdev = conn->hdev; | |
2016 | ||
2017 | BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags); | |
2018 | ||
2019 | skb->dev = (void *) hdev; | |
2020 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; | |
2021 | hci_add_acl_hdr(skb, conn->handle, flags); | |
2022 | ||
2023 | hci_queue_acl(conn, &chan->data_q, skb, flags); | |
1da177e4 | 2024 | |
c78ae283 | 2025 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
2026 | } |
2027 | EXPORT_SYMBOL(hci_send_acl); | |
2028 | ||
2029 | /* Send SCO data */ | |
0d861d8b | 2030 | void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
2031 | { |
2032 | struct hci_dev *hdev = conn->hdev; | |
2033 | struct hci_sco_hdr hdr; | |
2034 | ||
2035 | BT_DBG("%s len %d", hdev->name, skb->len); | |
2036 | ||
aca3192c | 2037 | hdr.handle = cpu_to_le16(conn->handle); |
1da177e4 LT |
2038 | hdr.dlen = skb->len; |
2039 | ||
badff6d0 ACM |
2040 | skb_push(skb, HCI_SCO_HDR_SIZE); |
2041 | skb_reset_transport_header(skb); | |
9c70220b | 2042 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
1da177e4 LT |
2043 | |
2044 | skb->dev = (void *) hdev; | |
0d48d939 | 2045 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
c78ae283 | 2046 | |
1da177e4 | 2047 | skb_queue_tail(&conn->data_q, skb); |
c78ae283 | 2048 | tasklet_schedule(&hdev->tx_task); |
1da177e4 LT |
2049 | } |
2050 | EXPORT_SYMBOL(hci_send_sco); | |
2051 | ||
2052 | /* ---- HCI TX task (outgoing data) ---- */ | |
2053 | ||
2054 | /* HCI Connection scheduler */ | |
2055 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) | |
2056 | { | |
2057 | struct hci_conn_hash *h = &hdev->conn_hash; | |
8035ded4 | 2058 | struct hci_conn *conn = NULL, *c; |
1da177e4 | 2059 | int num = 0, min = ~0; |
1da177e4 | 2060 | |
8e87d142 | 2061 | /* We don't have to lock device here. Connections are always |
1da177e4 | 2062 | * added and removed with TX task disabled. */ |
8035ded4 | 2063 | list_for_each_entry(c, &h->list, list) { |
769be974 | 2064 | if (c->type != type || skb_queue_empty(&c->data_q)) |
1da177e4 | 2065 | continue; |
769be974 MH |
2066 | |
2067 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) | |
2068 | continue; | |
2069 | ||
1da177e4 LT |
2070 | num++; |
2071 | ||
2072 | if (c->sent < min) { | |
2073 | min = c->sent; | |
2074 | conn = c; | |
2075 | } | |
52087a79 LAD |
2076 | |
2077 | if (hci_conn_num(hdev, type) == num) | |
2078 | break; | |
1da177e4 LT |
2079 | } |
2080 | ||
2081 | if (conn) { | |
6ed58ec5 VT |
2082 | int cnt, q; |
2083 | ||
2084 | switch (conn->type) { | |
2085 | case ACL_LINK: | |
2086 | cnt = hdev->acl_cnt; | |
2087 | break; | |
2088 | case SCO_LINK: | |
2089 | case ESCO_LINK: | |
2090 | cnt = hdev->sco_cnt; | |
2091 | break; | |
2092 | case LE_LINK: | |
2093 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; | |
2094 | break; | |
2095 | default: | |
2096 | cnt = 0; | |
2097 | BT_ERR("Unknown link type"); | |
2098 | } | |
2099 | ||
2100 | q = cnt / num; | |
1da177e4 LT |
2101 | *quote = q ? q : 1; |
2102 | } else | |
2103 | *quote = 0; | |
2104 | ||
2105 | BT_DBG("conn %p quote %d", conn, *quote); | |
2106 | return conn; | |
2107 | } | |
2108 | ||
bae1f5d9 | 2109 | static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type) |
1da177e4 LT |
2110 | { |
2111 | struct hci_conn_hash *h = &hdev->conn_hash; | |
8035ded4 | 2112 | struct hci_conn *c; |
1da177e4 | 2113 | |
bae1f5d9 | 2114 | BT_ERR("%s link tx timeout", hdev->name); |
1da177e4 LT |
2115 | |
2116 | /* Kill stalled connections */ | |
8035ded4 | 2117 | list_for_each_entry(c, &h->list, list) { |
bae1f5d9 VT |
2118 | if (c->type == type && c->sent) { |
2119 | BT_ERR("%s killing stalled connection %s", | |
1da177e4 LT |
2120 | hdev->name, batostr(&c->dst)); |
2121 | hci_acl_disconn(c, 0x13); | |
2122 | } | |
2123 | } | |
2124 | } | |
2125 | ||
73d80deb LAD |
2126 | static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type, |
2127 | int *quote) | |
1da177e4 | 2128 | { |
73d80deb LAD |
2129 | struct hci_conn_hash *h = &hdev->conn_hash; |
2130 | struct hci_chan *chan = NULL; | |
2131 | int num = 0, min = ~0, cur_prio = 0; | |
1da177e4 | 2132 | struct hci_conn *conn; |
73d80deb LAD |
2133 | int cnt, q, conn_num = 0; |
2134 | ||
2135 | BT_DBG("%s", hdev->name); | |
2136 | ||
2137 | list_for_each_entry(conn, &h->list, list) { | |
2138 | struct hci_chan_hash *ch; | |
2139 | struct hci_chan *tmp; | |
2140 | ||
2141 | if (conn->type != type) | |
2142 | continue; | |
2143 | ||
2144 | if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) | |
2145 | continue; | |
2146 | ||
2147 | conn_num++; | |
2148 | ||
2149 | ch = &conn->chan_hash; | |
2150 | ||
2151 | list_for_each_entry(tmp, &ch->list, list) { | |
2152 | struct sk_buff *skb; | |
2153 | ||
2154 | if (skb_queue_empty(&tmp->data_q)) | |
2155 | continue; | |
2156 | ||
2157 | skb = skb_peek(&tmp->data_q); | |
2158 | if (skb->priority < cur_prio) | |
2159 | continue; | |
2160 | ||
2161 | if (skb->priority > cur_prio) { | |
2162 | num = 0; | |
2163 | min = ~0; | |
2164 | cur_prio = skb->priority; | |
2165 | } | |
2166 | ||
2167 | num++; | |
2168 | ||
2169 | if (conn->sent < min) { | |
2170 | min = conn->sent; | |
2171 | chan = tmp; | |
2172 | } | |
2173 | } | |
2174 | ||
2175 | if (hci_conn_num(hdev, type) == conn_num) | |
2176 | break; | |
2177 | } | |
2178 | ||
2179 | if (!chan) | |
2180 | return NULL; | |
2181 | ||
2182 | switch (chan->conn->type) { | |
2183 | case ACL_LINK: | |
2184 | cnt = hdev->acl_cnt; | |
2185 | break; | |
2186 | case SCO_LINK: | |
2187 | case ESCO_LINK: | |
2188 | cnt = hdev->sco_cnt; | |
2189 | break; | |
2190 | case LE_LINK: | |
2191 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; | |
2192 | break; | |
2193 | default: | |
2194 | cnt = 0; | |
2195 | BT_ERR("Unknown link type"); | |
2196 | } | |
2197 | ||
2198 | q = cnt / num; | |
2199 | *quote = q ? q : 1; | |
2200 | BT_DBG("chan %p quote %d", chan, *quote); | |
2201 | return chan; | |
2202 | } | |
2203 | ||
02b20f0b LAD |
2204 | static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type) |
2205 | { | |
2206 | struct hci_conn_hash *h = &hdev->conn_hash; | |
2207 | struct hci_conn *conn; | |
2208 | int num = 0; | |
2209 | ||
2210 | BT_DBG("%s", hdev->name); | |
2211 | ||
2212 | list_for_each_entry(conn, &h->list, list) { | |
2213 | struct hci_chan_hash *ch; | |
2214 | struct hci_chan *chan; | |
2215 | ||
2216 | if (conn->type != type) | |
2217 | continue; | |
2218 | ||
2219 | if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) | |
2220 | continue; | |
2221 | ||
2222 | num++; | |
2223 | ||
2224 | ch = &conn->chan_hash; | |
2225 | list_for_each_entry(chan, &ch->list, list) { | |
2226 | struct sk_buff *skb; | |
2227 | ||
2228 | if (chan->sent) { | |
2229 | chan->sent = 0; | |
2230 | continue; | |
2231 | } | |
2232 | ||
2233 | if (skb_queue_empty(&chan->data_q)) | |
2234 | continue; | |
2235 | ||
2236 | skb = skb_peek(&chan->data_q); | |
2237 | if (skb->priority >= HCI_PRIO_MAX - 1) | |
2238 | continue; | |
2239 | ||
2240 | skb->priority = HCI_PRIO_MAX - 1; | |
2241 | ||
2242 | BT_DBG("chan %p skb %p promoted to %d", chan, skb, | |
2243 | skb->priority); | |
2244 | } | |
2245 | ||
2246 | if (hci_conn_num(hdev, type) == num) | |
2247 | break; | |
2248 | } | |
2249 | } | |
2250 | ||
73d80deb LAD |
2251 | static inline void hci_sched_acl(struct hci_dev *hdev) |
2252 | { | |
2253 | struct hci_chan *chan; | |
1da177e4 LT |
2254 | struct sk_buff *skb; |
2255 | int quote; | |
73d80deb | 2256 | unsigned int cnt; |
1da177e4 LT |
2257 | |
2258 | BT_DBG("%s", hdev->name); | |
2259 | ||
52087a79 LAD |
2260 | if (!hci_conn_num(hdev, ACL_LINK)) |
2261 | return; | |
2262 | ||
1da177e4 LT |
2263 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
2264 | /* ACL tx timeout must be longer than maximum | |
2265 | * link supervision timeout (40.9 seconds) */ | |
82453021 | 2266 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
bae1f5d9 | 2267 | hci_link_tx_to(hdev, ACL_LINK); |
1da177e4 LT |
2268 | } |
2269 | ||
73d80deb | 2270 | cnt = hdev->acl_cnt; |
04837f64 | 2271 | |
73d80deb LAD |
2272 | while (hdev->acl_cnt && |
2273 | (chan = hci_chan_sent(hdev, ACL_LINK, "e))) { | |
ec1cce24 LAD |
2274 | u32 priority = (skb_peek(&chan->data_q))->priority; |
2275 | while (quote-- && (skb = skb_peek(&chan->data_q))) { | |
73d80deb LAD |
2276 | BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
2277 | skb->len, skb->priority); | |
2278 | ||
ec1cce24 LAD |
2279 | /* Stop if priority has changed */ |
2280 | if (skb->priority < priority) | |
2281 | break; | |
2282 | ||
2283 | skb = skb_dequeue(&chan->data_q); | |
2284 | ||
73d80deb LAD |
2285 | hci_conn_enter_active_mode(chan->conn, |
2286 | bt_cb(skb)->force_active); | |
04837f64 | 2287 | |
1da177e4 LT |
2288 | hci_send_frame(skb); |
2289 | hdev->acl_last_tx = jiffies; | |
2290 | ||
2291 | hdev->acl_cnt--; | |
73d80deb LAD |
2292 | chan->sent++; |
2293 | chan->conn->sent++; | |
1da177e4 LT |
2294 | } |
2295 | } | |
02b20f0b LAD |
2296 | |
2297 | if (cnt != hdev->acl_cnt) | |
2298 | hci_prio_recalculate(hdev, ACL_LINK); | |
1da177e4 LT |
2299 | } |
2300 | ||
2301 | /* Schedule SCO */ | |
2302 | static inline void hci_sched_sco(struct hci_dev *hdev) | |
2303 | { | |
2304 | struct hci_conn *conn; | |
2305 | struct sk_buff *skb; | |
2306 | int quote; | |
2307 | ||
2308 | BT_DBG("%s", hdev->name); | |
2309 | ||
52087a79 LAD |
2310 | if (!hci_conn_num(hdev, SCO_LINK)) |
2311 | return; | |
2312 | ||
1da177e4 LT |
2313 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { |
2314 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
2315 | BT_DBG("skb %p len %d", skb, skb->len); | |
2316 | hci_send_frame(skb); | |
2317 | ||
2318 | conn->sent++; | |
2319 | if (conn->sent == ~0) | |
2320 | conn->sent = 0; | |
2321 | } | |
2322 | } | |
2323 | } | |
2324 | ||
b6a0dc82 MH |
2325 | static inline void hci_sched_esco(struct hci_dev *hdev) |
2326 | { | |
2327 | struct hci_conn *conn; | |
2328 | struct sk_buff *skb; | |
2329 | int quote; | |
2330 | ||
2331 | BT_DBG("%s", hdev->name); | |
2332 | ||
52087a79 LAD |
2333 | if (!hci_conn_num(hdev, ESCO_LINK)) |
2334 | return; | |
2335 | ||
b6a0dc82 MH |
2336 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { |
2337 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { | |
2338 | BT_DBG("skb %p len %d", skb, skb->len); | |
2339 | hci_send_frame(skb); | |
2340 | ||
2341 | conn->sent++; | |
2342 | if (conn->sent == ~0) | |
2343 | conn->sent = 0; | |
2344 | } | |
2345 | } | |
2346 | } | |
2347 | ||
6ed58ec5 VT |
2348 | static inline void hci_sched_le(struct hci_dev *hdev) |
2349 | { | |
73d80deb | 2350 | struct hci_chan *chan; |
6ed58ec5 | 2351 | struct sk_buff *skb; |
02b20f0b | 2352 | int quote, cnt, tmp; |
6ed58ec5 VT |
2353 | |
2354 | BT_DBG("%s", hdev->name); | |
2355 | ||
52087a79 LAD |
2356 | if (!hci_conn_num(hdev, LE_LINK)) |
2357 | return; | |
2358 | ||
6ed58ec5 VT |
2359 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
2360 | /* LE tx timeout must be longer than maximum | |
2361 | * link supervision timeout (40.9 seconds) */ | |
bae1f5d9 | 2362 | if (!hdev->le_cnt && hdev->le_pkts && |
6ed58ec5 | 2363 | time_after(jiffies, hdev->le_last_tx + HZ * 45)) |
bae1f5d9 | 2364 | hci_link_tx_to(hdev, LE_LINK); |
6ed58ec5 VT |
2365 | } |
2366 | ||
2367 | cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt; | |
02b20f0b | 2368 | tmp = cnt; |
73d80deb | 2369 | while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) { |
ec1cce24 LAD |
2370 | u32 priority = (skb_peek(&chan->data_q))->priority; |
2371 | while (quote-- && (skb = skb_peek(&chan->data_q))) { | |
73d80deb LAD |
2372 | BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
2373 | skb->len, skb->priority); | |
6ed58ec5 | 2374 | |
ec1cce24 LAD |
2375 | /* Stop if priority has changed */ |
2376 | if (skb->priority < priority) | |
2377 | break; | |
2378 | ||
2379 | skb = skb_dequeue(&chan->data_q); | |
2380 | ||
6ed58ec5 VT |
2381 | hci_send_frame(skb); |
2382 | hdev->le_last_tx = jiffies; | |
2383 | ||
2384 | cnt--; | |
73d80deb LAD |
2385 | chan->sent++; |
2386 | chan->conn->sent++; | |
6ed58ec5 VT |
2387 | } |
2388 | } | |
73d80deb | 2389 | |
6ed58ec5 VT |
2390 | if (hdev->le_pkts) |
2391 | hdev->le_cnt = cnt; | |
2392 | else | |
2393 | hdev->acl_cnt = cnt; | |
02b20f0b LAD |
2394 | |
2395 | if (cnt != tmp) | |
2396 | hci_prio_recalculate(hdev, LE_LINK); | |
6ed58ec5 VT |
2397 | } |
2398 | ||
1da177e4 LT |
2399 | static void hci_tx_task(unsigned long arg) |
2400 | { | |
2401 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2402 | struct sk_buff *skb; | |
2403 | ||
2404 | read_lock(&hci_task_lock); | |
2405 | ||
6ed58ec5 VT |
2406 | BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt, |
2407 | hdev->sco_cnt, hdev->le_cnt); | |
1da177e4 LT |
2408 | |
2409 | /* Schedule queues and send stuff to HCI driver */ | |
2410 | ||
2411 | hci_sched_acl(hdev); | |
2412 | ||
2413 | hci_sched_sco(hdev); | |
2414 | ||
b6a0dc82 MH |
2415 | hci_sched_esco(hdev); |
2416 | ||
6ed58ec5 VT |
2417 | hci_sched_le(hdev); |
2418 | ||
1da177e4 LT |
2419 | /* Send next queued raw (unknown type) packet */ |
2420 | while ((skb = skb_dequeue(&hdev->raw_q))) | |
2421 | hci_send_frame(skb); | |
2422 | ||
2423 | read_unlock(&hci_task_lock); | |
2424 | } | |
2425 | ||
25985edc | 2426 | /* ----- HCI RX task (incoming data processing) ----- */ |
1da177e4 LT |
2427 | |
2428 | /* ACL data packet */ | |
2429 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
2430 | { | |
2431 | struct hci_acl_hdr *hdr = (void *) skb->data; | |
2432 | struct hci_conn *conn; | |
2433 | __u16 handle, flags; | |
2434 | ||
2435 | skb_pull(skb, HCI_ACL_HDR_SIZE); | |
2436 | ||
2437 | handle = __le16_to_cpu(hdr->handle); | |
2438 | flags = hci_flags(handle); | |
2439 | handle = hci_handle(handle); | |
2440 | ||
2441 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); | |
2442 | ||
2443 | hdev->stat.acl_rx++; | |
2444 | ||
2445 | hci_dev_lock(hdev); | |
2446 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
2447 | hci_dev_unlock(hdev); | |
8e87d142 | 2448 | |
1da177e4 LT |
2449 | if (conn) { |
2450 | register struct hci_proto *hp; | |
2451 | ||
14b12d0b | 2452 | hci_conn_enter_active_mode(conn, bt_cb(skb)->force_active); |
04837f64 | 2453 | |
1da177e4 | 2454 | /* Send to upper protocol */ |
70f23020 AE |
2455 | hp = hci_proto[HCI_PROTO_L2CAP]; |
2456 | if (hp && hp->recv_acldata) { | |
1da177e4 LT |
2457 | hp->recv_acldata(conn, skb, flags); |
2458 | return; | |
2459 | } | |
2460 | } else { | |
8e87d142 | 2461 | BT_ERR("%s ACL packet for unknown connection handle %d", |
1da177e4 LT |
2462 | hdev->name, handle); |
2463 | } | |
2464 | ||
2465 | kfree_skb(skb); | |
2466 | } | |
2467 | ||
2468 | /* SCO data packet */ | |
2469 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) | |
2470 | { | |
2471 | struct hci_sco_hdr *hdr = (void *) skb->data; | |
2472 | struct hci_conn *conn; | |
2473 | __u16 handle; | |
2474 | ||
2475 | skb_pull(skb, HCI_SCO_HDR_SIZE); | |
2476 | ||
2477 | handle = __le16_to_cpu(hdr->handle); | |
2478 | ||
2479 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); | |
2480 | ||
2481 | hdev->stat.sco_rx++; | |
2482 | ||
2483 | hci_dev_lock(hdev); | |
2484 | conn = hci_conn_hash_lookup_handle(hdev, handle); | |
2485 | hci_dev_unlock(hdev); | |
2486 | ||
2487 | if (conn) { | |
2488 | register struct hci_proto *hp; | |
2489 | ||
2490 | /* Send to upper protocol */ | |
70f23020 AE |
2491 | hp = hci_proto[HCI_PROTO_SCO]; |
2492 | if (hp && hp->recv_scodata) { | |
1da177e4 LT |
2493 | hp->recv_scodata(conn, skb); |
2494 | return; | |
2495 | } | |
2496 | } else { | |
8e87d142 | 2497 | BT_ERR("%s SCO packet for unknown connection handle %d", |
1da177e4 LT |
2498 | hdev->name, handle); |
2499 | } | |
2500 | ||
2501 | kfree_skb(skb); | |
2502 | } | |
2503 | ||
6516455d | 2504 | static void hci_rx_task(unsigned long arg) |
1da177e4 LT |
2505 | { |
2506 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2507 | struct sk_buff *skb; | |
2508 | ||
2509 | BT_DBG("%s", hdev->name); | |
2510 | ||
2511 | read_lock(&hci_task_lock); | |
2512 | ||
2513 | while ((skb = skb_dequeue(&hdev->rx_q))) { | |
2514 | if (atomic_read(&hdev->promisc)) { | |
2515 | /* Send copy to the sockets */ | |
eec8d2bc | 2516 | hci_send_to_sock(hdev, skb, NULL); |
1da177e4 LT |
2517 | } |
2518 | ||
2519 | if (test_bit(HCI_RAW, &hdev->flags)) { | |
2520 | kfree_skb(skb); | |
2521 | continue; | |
2522 | } | |
2523 | ||
2524 | if (test_bit(HCI_INIT, &hdev->flags)) { | |
2525 | /* Don't process data packets in this states. */ | |
0d48d939 | 2526 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
2527 | case HCI_ACLDATA_PKT: |
2528 | case HCI_SCODATA_PKT: | |
2529 | kfree_skb(skb); | |
2530 | continue; | |
3ff50b79 | 2531 | } |
1da177e4 LT |
2532 | } |
2533 | ||
2534 | /* Process frame */ | |
0d48d939 | 2535 | switch (bt_cb(skb)->pkt_type) { |
1da177e4 LT |
2536 | case HCI_EVENT_PKT: |
2537 | hci_event_packet(hdev, skb); | |
2538 | break; | |
2539 | ||
2540 | case HCI_ACLDATA_PKT: | |
2541 | BT_DBG("%s ACL data packet", hdev->name); | |
2542 | hci_acldata_packet(hdev, skb); | |
2543 | break; | |
2544 | ||
2545 | case HCI_SCODATA_PKT: | |
2546 | BT_DBG("%s SCO data packet", hdev->name); | |
2547 | hci_scodata_packet(hdev, skb); | |
2548 | break; | |
2549 | ||
2550 | default: | |
2551 | kfree_skb(skb); | |
2552 | break; | |
2553 | } | |
2554 | } | |
2555 | ||
2556 | read_unlock(&hci_task_lock); | |
2557 | } | |
2558 | ||
2559 | static void hci_cmd_task(unsigned long arg) | |
2560 | { | |
2561 | struct hci_dev *hdev = (struct hci_dev *) arg; | |
2562 | struct sk_buff *skb; | |
2563 | ||
2564 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); | |
2565 | ||
1da177e4 | 2566 | /* Send queued commands */ |
5a08ecce AE |
2567 | if (atomic_read(&hdev->cmd_cnt)) { |
2568 | skb = skb_dequeue(&hdev->cmd_q); | |
2569 | if (!skb) | |
2570 | return; | |
2571 | ||
7585b97a | 2572 | kfree_skb(hdev->sent_cmd); |
1da177e4 | 2573 | |
70f23020 AE |
2574 | hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC); |
2575 | if (hdev->sent_cmd) { | |
1da177e4 LT |
2576 | atomic_dec(&hdev->cmd_cnt); |
2577 | hci_send_frame(skb); | |
7bdb8a5c SJ |
2578 | if (test_bit(HCI_RESET, &hdev->flags)) |
2579 | del_timer(&hdev->cmd_timer); | |
2580 | else | |
2581 | mod_timer(&hdev->cmd_timer, | |
6bd32326 | 2582 | jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT)); |
1da177e4 LT |
2583 | } else { |
2584 | skb_queue_head(&hdev->cmd_q, skb); | |
c78ae283 | 2585 | tasklet_schedule(&hdev->cmd_task); |
1da177e4 LT |
2586 | } |
2587 | } | |
2588 | } | |
2519a1fc AG |
2589 | |
2590 | int hci_do_inquiry(struct hci_dev *hdev, u8 length) | |
2591 | { | |
2592 | /* General inquiry access code (GIAC) */ | |
2593 | u8 lap[3] = { 0x33, 0x8b, 0x9e }; | |
2594 | struct hci_cp_inquiry cp; | |
2595 | ||
2596 | BT_DBG("%s", hdev->name); | |
2597 | ||
2598 | if (test_bit(HCI_INQUIRY, &hdev->flags)) | |
2599 | return -EINPROGRESS; | |
2600 | ||
2601 | memset(&cp, 0, sizeof(cp)); | |
2602 | memcpy(&cp.lap, lap, sizeof(cp.lap)); | |
2603 | cp.length = length; | |
2604 | ||
2605 | return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); | |
2606 | } | |
023d5049 AG |
2607 | |
2608 | int hci_cancel_inquiry(struct hci_dev *hdev) | |
2609 | { | |
2610 | BT_DBG("%s", hdev->name); | |
2611 | ||
2612 | if (!test_bit(HCI_INQUIRY, &hdev->flags)) | |
2613 | return -EPERM; | |
2614 | ||
2615 | return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL); | |
2616 | } |