1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * |
4 | * Bluetooth virtual HCI driver |
5 | * |
6 | * Copyright (C) 2000-2001 Qualcomm Incorporated |
7 | * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> |
8 | * Copyright (C) 2004-2006 Marcel Holtmann <marcel@holtmann.org> |
9 | */ |
10 | |
11 | #include <linux/module.h> |
12 | #include <asm/unaligned.h> |
13 | |
14 | #include <linux/kernel.h> |
15 | #include <linux/init.h> |
16 | #include <linux/slab.h> |
17 | #include <linux/types.h> |
18 | #include <linux/errno.h> |
19 | #include <linux/sched.h> |
20 | #include <linux/poll.h> |
21 | |
22 | #include <linux/skbuff.h> |
23 | #include <linux/miscdevice.h> |
24 | #include <linux/debugfs.h> |
25 | |
26 | #include <net/bluetooth/bluetooth.h> |
27 | #include <net/bluetooth/hci_core.h> |
28 | |
29 | #define VERSION "1.5" |
30 | |
31 | static bool amp; |
32 | |
33 | struct vhci_data { |
34 | struct hci_dev *hdev; |
35 | |
36 | wait_queue_head_t read_wait; |
37 | struct sk_buff_head readq; |
38 | |
39 | struct mutex open_mutex; |
40 | struct delayed_work open_timeout; |
41 | struct work_struct suspend_work; |
42 | |
43 | bool suspended; |
44 | bool wakeup; |
45 | __u16 msft_opcode; |
46 | bool aosp_capable; |
47 | }; |
48 | |
49 | static int vhci_open_dev(struct hci_dev *hdev) |
50 | { |
51 | return 0; |
52 | } |
53 | |
54 | static int vhci_close_dev(struct hci_dev *hdev) |
55 | { |
56 | struct vhci_data *data = hci_get_drvdata(hdev); |
57 | |
58 | skb_queue_purge(list: &data->readq); |
59 | |
60 | return 0; |
61 | } |
62 | |
63 | static int vhci_flush(struct hci_dev *hdev) |
64 | { |
65 | struct vhci_data *data = hci_get_drvdata(hdev); |
66 | |
67 | skb_queue_purge(list: &data->readq); |
68 | |
69 | return 0; |
70 | } |
71 | |
72 | static int vhci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
73 | { |
74 | struct vhci_data *data = hci_get_drvdata(hdev); |
75 | |
76 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
77 | |
78 | mutex_lock(&data->open_mutex); |
79 | skb_queue_tail(list: &data->readq, newsk: skb); |
80 | mutex_unlock(lock: &data->open_mutex); |
81 | |
82 | wake_up_interruptible(&data->read_wait); |
83 | return 0; |
84 | } |
85 | |
86 | static int vhci_get_data_path_id(struct hci_dev *hdev, u8 *data_path_id) |
87 | { |
88 | *data_path_id = 0; |
89 | return 0; |
90 | } |
91 | |
92 | static int vhci_get_codec_config_data(struct hci_dev *hdev, __u8 type, |
93 | struct bt_codec *codec, __u8 *vnd_len, |
94 | __u8 **vnd_data) |
95 | { |
96 | if (type != ESCO_LINK) |
97 | return -EINVAL; |
98 | |
99 | *vnd_len = 0; |
100 | *vnd_data = NULL; |
101 | return 0; |
102 | } |
103 | |
104 | static bool vhci_wakeup(struct hci_dev *hdev) |
105 | { |
106 | struct vhci_data *data = hci_get_drvdata(hdev); |
107 | |
108 | return data->wakeup; |
109 | } |
110 | |
111 | static ssize_t force_suspend_read(struct file *file, char __user *user_buf, |
112 | size_t count, loff_t *ppos) |
113 | { |
114 | struct vhci_data *data = file->private_data; |
115 | char buf[3]; |
116 | |
117 | buf[0] = data->suspended ? 'Y' : 'N'; |
118 | buf[1] = '\n'; |
119 | buf[2] = '\0'; |
120 | return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2); |
121 | } |
122 | |
123 | static void vhci_suspend_work(struct work_struct *work) |
124 | { |
125 | struct vhci_data *data = container_of(work, struct vhci_data, |
126 | suspend_work); |
127 | |
128 | if (data->suspended) |
129 | hci_suspend_dev(hdev: data->hdev); |
130 | else |
131 | hci_resume_dev(hdev: data->hdev); |
132 | } |
133 | |
134 | static ssize_t force_suspend_write(struct file *file, |
135 | const char __user *user_buf, |
136 | size_t count, loff_t *ppos) |
137 | { |
138 | struct vhci_data *data = file->private_data; |
139 | bool enable; |
140 | int err; |
141 | |
142 | err = kstrtobool_from_user(s: user_buf, count, res: &enable); |
143 | if (err) |
144 | return err; |
145 | |
146 | if (data->suspended == enable) |
147 | return -EALREADY; |
148 | |
149 | data->suspended = enable; |
150 | |
151 | schedule_work(work: &data->suspend_work); |
152 | |
153 | return count; |
154 | } |
155 | |
156 | static const struct file_operations force_suspend_fops = { |
157 | .open = simple_open, |
158 | .read = force_suspend_read, |
159 | .write = force_suspend_write, |
160 | .llseek = default_llseek, |
161 | }; |
162 | |
163 | static ssize_t force_wakeup_read(struct file *file, char __user *user_buf, |
164 | size_t count, loff_t *ppos) |
165 | { |
166 | struct vhci_data *data = file->private_data; |
167 | char buf[3]; |
168 | |
169 | buf[0] = data->wakeup ? 'Y' : 'N'; |
170 | buf[1] = '\n'; |
171 | buf[2] = '\0'; |
172 | return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2); |
173 | } |
174 | |
175 | static ssize_t force_wakeup_write(struct file *file, |
176 | const char __user *user_buf, size_t count, |
177 | loff_t *ppos) |
178 | { |
179 | struct vhci_data *data = file->private_data; |
180 | bool enable; |
181 | int err; |
182 | |
183 | err = kstrtobool_from_user(s: user_buf, count, res: &enable); |
184 | if (err) |
185 | return err; |
186 | |
187 | if (data->wakeup == enable) |
188 | return -EALREADY; |
189 | |
190 | data->wakeup = enable; |
191 | |
192 | return count; |
193 | } |
194 | |
195 | static const struct file_operations force_wakeup_fops = { |
196 | .open = simple_open, |
197 | .read = force_wakeup_read, |
198 | .write = force_wakeup_write, |
199 | .llseek = default_llseek, |
200 | }; |
201 | |
202 | static int msft_opcode_set(void *data, u64 val) |
203 | { |
204 | struct vhci_data *vhci = data; |
205 | |
206 | if (val > 0xffff || hci_opcode_ogf(val) != 0x3f) |
207 | return -EINVAL; |
208 | |
209 | if (vhci->msft_opcode) |
210 | return -EALREADY; |
211 | |
212 | vhci->msft_opcode = val; |
213 | |
214 | return 0; |
215 | } |
216 | |
217 | static int msft_opcode_get(void *data, u64 *val) |
218 | { |
219 | struct vhci_data *vhci = data; |
220 | |
221 | *val = vhci->msft_opcode; |
222 | |
223 | return 0; |
224 | } |
225 | |
226 | DEFINE_DEBUGFS_ATTRIBUTE(msft_opcode_fops, msft_opcode_get, msft_opcode_set, |
227 | "%llu\n" ); |
228 | |
229 | static ssize_t aosp_capable_read(struct file *file, char __user *user_buf, |
230 | size_t count, loff_t *ppos) |
231 | { |
232 | struct vhci_data *vhci = file->private_data; |
233 | char buf[3]; |
234 | |
235 | buf[0] = vhci->aosp_capable ? 'Y' : 'N'; |
236 | buf[1] = '\n'; |
237 | buf[2] = '\0'; |
238 | return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2); |
239 | } |
240 | |
241 | static ssize_t aosp_capable_write(struct file *file, |
242 | const char __user *user_buf, size_t count, |
243 | loff_t *ppos) |
244 | { |
245 | struct vhci_data *vhci = file->private_data; |
246 | bool enable; |
247 | int err; |
248 | |
249 | err = kstrtobool_from_user(s: user_buf, count, res: &enable); |
250 | if (err) |
251 | return err; |
252 | |
253 | if (!enable) |
254 | return -EINVAL; |
255 | |
256 | if (vhci->aosp_capable) |
257 | return -EALREADY; |
258 | |
259 | vhci->aosp_capable = enable; |
260 | |
261 | return count; |
262 | } |
263 | |
264 | static const struct file_operations aosp_capable_fops = { |
265 | .open = simple_open, |
266 | .read = aosp_capable_read, |
267 | .write = aosp_capable_write, |
268 | .llseek = default_llseek, |
269 | }; |
270 | |
271 | static int vhci_setup(struct hci_dev *hdev) |
272 | { |
273 | struct vhci_data *vhci = hci_get_drvdata(hdev); |
274 | |
275 | if (vhci->msft_opcode) |
276 | hci_set_msft_opcode(hdev, opcode: vhci->msft_opcode); |
277 | |
278 | if (vhci->aosp_capable) |
279 | hci_set_aosp_capable(hdev); |
280 | |
281 | return 0; |
282 | } |
283 | |
284 | static void vhci_coredump(struct hci_dev *hdev) |
285 | { |
286 | /* No need to do anything */ |
287 | } |
288 | |
289 | static void vhci_coredump_hdr(struct hci_dev *hdev, struct sk_buff *skb) |
290 | { |
291 | char buf[80]; |
292 | |
293 | snprintf(buf, size: sizeof(buf), fmt: "Controller Name: vhci_ctrl\n" ); |
294 | skb_put_data(skb, data: buf, strlen(buf)); |
295 | |
296 | snprintf(buf, size: sizeof(buf), fmt: "Firmware Version: vhci_fw\n" ); |
297 | skb_put_data(skb, data: buf, strlen(buf)); |
298 | |
299 | snprintf(buf, size: sizeof(buf), fmt: "Driver: vhci_drv\n" ); |
300 | skb_put_data(skb, data: buf, strlen(buf)); |
301 | |
302 | snprintf(buf, size: sizeof(buf), fmt: "Vendor: vhci\n" ); |
303 | skb_put_data(skb, data: buf, strlen(buf)); |
304 | } |
305 | |
306 | #define MAX_COREDUMP_LINE_LEN 40 |
307 | |
308 | struct devcoredump_test_data { |
309 | enum devcoredump_state state; |
310 | unsigned int timeout; |
311 | char data[MAX_COREDUMP_LINE_LEN]; |
312 | }; |
313 | |
314 | static inline void force_devcd_timeout(struct hci_dev *hdev, |
315 | unsigned int timeout) |
316 | { |
317 | #ifdef CONFIG_DEV_COREDUMP |
318 | hdev->dump.timeout = msecs_to_jiffies(m: timeout * 1000); |
319 | #endif |
320 | } |
321 | |
322 | static ssize_t force_devcd_write(struct file *file, const char __user *user_buf, |
323 | size_t count, loff_t *ppos) |
324 | { |
325 | struct vhci_data *data = file->private_data; |
326 | struct hci_dev *hdev = data->hdev; |
327 | struct sk_buff *skb = NULL; |
328 | struct devcoredump_test_data dump_data; |
329 | size_t data_size; |
330 | int ret; |
331 | |
332 | if (count < offsetof(struct devcoredump_test_data, data) || |
333 | count > sizeof(dump_data)) |
334 | return -EINVAL; |
335 | |
336 | if (copy_from_user(to: &dump_data, from: user_buf, n: count)) |
337 | return -EFAULT; |
338 | |
339 | data_size = count - offsetof(struct devcoredump_test_data, data); |
340 | skb = alloc_skb(size: data_size, GFP_ATOMIC); |
341 | if (!skb) |
342 | return -ENOMEM; |
343 | skb_put_data(skb, data: &dump_data.data, len: data_size); |
344 | |
345 | hci_devcd_register(hdev, coredump: vhci_coredump, dmp_hdr: vhci_coredump_hdr, NULL); |
346 | |
347 | /* Force the devcoredump timeout */ |
348 | if (dump_data.timeout) |
349 | force_devcd_timeout(hdev, timeout: dump_data.timeout); |
350 | |
351 | ret = hci_devcd_init(hdev, dump_size: skb->len); |
352 | if (ret) { |
353 | BT_ERR("Failed to generate devcoredump" ); |
354 | kfree_skb(skb); |
355 | return ret; |
356 | } |
357 | |
358 | hci_devcd_append(hdev, skb); |
359 | |
360 | switch (dump_data.state) { |
361 | case HCI_DEVCOREDUMP_DONE: |
362 | hci_devcd_complete(hdev); |
363 | break; |
364 | case HCI_DEVCOREDUMP_ABORT: |
365 | hci_devcd_abort(hdev); |
366 | break; |
367 | case HCI_DEVCOREDUMP_TIMEOUT: |
368 | /* Do nothing */ |
369 | break; |
370 | default: |
371 | return -EINVAL; |
372 | } |
373 | |
374 | return count; |
375 | } |
376 | |
377 | static const struct file_operations force_devcoredump_fops = { |
378 | .open = simple_open, |
379 | .write = force_devcd_write, |
380 | }; |
381 | |
382 | static int __vhci_create_device(struct vhci_data *data, __u8 opcode) |
383 | { |
384 | struct hci_dev *hdev; |
385 | struct sk_buff *skb; |
386 | __u8 dev_type; |
387 | |
388 | if (data->hdev) |
389 | return -EBADFD; |
390 | |
391 | /* bits 0-1 are dev_type (Primary or AMP) */ |
392 | dev_type = opcode & 0x03; |
393 | |
394 | if (dev_type != HCI_PRIMARY && dev_type != HCI_AMP) |
395 | return -EINVAL; |
396 | |
397 | /* bits 2-5 are reserved (must be zero) */ |
398 | if (opcode & 0x3c) |
399 | return -EINVAL; |
400 | |
401 | skb = bt_skb_alloc(len: 4, GFP_KERNEL); |
402 | if (!skb) |
403 | return -ENOMEM; |
404 | |
405 | hdev = hci_alloc_dev(); |
406 | if (!hdev) { |
407 | kfree_skb(skb); |
408 | return -ENOMEM; |
409 | } |
410 | |
411 | data->hdev = hdev; |
412 | |
413 | hdev->bus = HCI_VIRTUAL; |
414 | hdev->dev_type = dev_type; |
415 | hci_set_drvdata(hdev, data); |
416 | |
417 | hdev->open = vhci_open_dev; |
418 | hdev->close = vhci_close_dev; |
419 | hdev->flush = vhci_flush; |
420 | hdev->send = vhci_send_frame; |
421 | hdev->get_data_path_id = vhci_get_data_path_id; |
422 | hdev->get_codec_config_data = vhci_get_codec_config_data; |
423 | hdev->wakeup = vhci_wakeup; |
424 | hdev->setup = vhci_setup; |
425 | set_bit(nr: HCI_QUIRK_NON_PERSISTENT_SETUP, addr: &hdev->quirks); |
426 | |
427 | /* bit 6 is for external configuration */ |
428 | if (opcode & 0x40) |
429 | set_bit(nr: HCI_QUIRK_EXTERNAL_CONFIG, addr: &hdev->quirks); |
430 | |
431 | /* bit 7 is for raw device */ |
432 | if (opcode & 0x80) |
433 | set_bit(nr: HCI_QUIRK_RAW_DEVICE, addr: &hdev->quirks); |
434 | |
435 | set_bit(nr: HCI_QUIRK_VALID_LE_STATES, addr: &hdev->quirks); |
436 | |
437 | if (hci_register_dev(hdev) < 0) { |
438 | BT_ERR("Can't register HCI device" ); |
439 | hci_free_dev(hdev); |
440 | data->hdev = NULL; |
441 | kfree_skb(skb); |
442 | return -EBUSY; |
443 | } |
444 | |
445 | debugfs_create_file(name: "force_suspend" , mode: 0644, parent: hdev->debugfs, data, |
446 | fops: &force_suspend_fops); |
447 | |
448 | debugfs_create_file(name: "force_wakeup" , mode: 0644, parent: hdev->debugfs, data, |
449 | fops: &force_wakeup_fops); |
450 | |
451 | if (IS_ENABLED(CONFIG_BT_MSFTEXT)) |
452 | debugfs_create_file(name: "msft_opcode" , mode: 0644, parent: hdev->debugfs, data, |
453 | fops: &msft_opcode_fops); |
454 | |
455 | if (IS_ENABLED(CONFIG_BT_AOSPEXT)) |
456 | debugfs_create_file(name: "aosp_capable" , mode: 0644, parent: hdev->debugfs, data, |
457 | fops: &aosp_capable_fops); |
458 | |
459 | debugfs_create_file(name: "force_devcoredump" , mode: 0644, parent: hdev->debugfs, data, |
460 | fops: &force_devcoredump_fops); |
461 | |
462 | hci_skb_pkt_type(skb) = HCI_VENDOR_PKT; |
463 | |
464 | skb_put_u8(skb, val: 0xff); |
465 | skb_put_u8(skb, val: opcode); |
466 | put_unaligned_le16(val: hdev->id, p: skb_put(skb, len: 2)); |
467 | skb_queue_tail(list: &data->readq, newsk: skb); |
468 | |
469 | wake_up_interruptible(&data->read_wait); |
470 | return 0; |
471 | } |
472 | |
473 | static int vhci_create_device(struct vhci_data *data, __u8 opcode) |
474 | { |
475 | int err; |
476 | |
477 | mutex_lock(&data->open_mutex); |
478 | err = __vhci_create_device(data, opcode); |
479 | mutex_unlock(lock: &data->open_mutex); |
480 | |
481 | return err; |
482 | } |
483 | |
484 | static inline ssize_t vhci_get_user(struct vhci_data *data, |
485 | struct iov_iter *from) |
486 | { |
487 | size_t len = iov_iter_count(i: from); |
488 | struct sk_buff *skb; |
489 | __u8 pkt_type, opcode; |
490 | int ret; |
491 | |
492 | if (len < 2 || len > HCI_MAX_FRAME_SIZE) |
493 | return -EINVAL; |
494 | |
495 | skb = bt_skb_alloc(len, GFP_KERNEL); |
496 | if (!skb) |
497 | return -ENOMEM; |
498 | |
499 | if (!copy_from_iter_full(addr: skb_put(skb, len), bytes: len, i: from)) { |
500 | kfree_skb(skb); |
501 | return -EFAULT; |
502 | } |
503 | |
504 | pkt_type = *((__u8 *) skb->data); |
505 | skb_pull(skb, len: 1); |
506 | |
507 | switch (pkt_type) { |
508 | case HCI_EVENT_PKT: |
509 | case HCI_ACLDATA_PKT: |
510 | case HCI_SCODATA_PKT: |
511 | case HCI_ISODATA_PKT: |
512 | if (!data->hdev) { |
513 | kfree_skb(skb); |
514 | return -ENODEV; |
515 | } |
516 | |
517 | hci_skb_pkt_type(skb) = pkt_type; |
518 | |
519 | ret = hci_recv_frame(hdev: data->hdev, skb); |
520 | break; |
521 | |
522 | case HCI_VENDOR_PKT: |
523 | cancel_delayed_work_sync(dwork: &data->open_timeout); |
524 | |
525 | opcode = *((__u8 *) skb->data); |
526 | skb_pull(skb, len: 1); |
527 | |
528 | if (skb->len > 0) { |
529 | kfree_skb(skb); |
530 | return -EINVAL; |
531 | } |
532 | |
533 | kfree_skb(skb); |
534 | |
535 | ret = vhci_create_device(data, opcode); |
536 | break; |
537 | |
538 | default: |
539 | kfree_skb(skb); |
540 | return -EINVAL; |
541 | } |
542 | |
543 | return (ret < 0) ? ret : len; |
544 | } |
545 | |
546 | static inline ssize_t vhci_put_user(struct vhci_data *data, |
547 | struct sk_buff *skb, |
548 | char __user *buf, int count) |
549 | { |
550 | char __user *ptr = buf; |
551 | int len; |
552 | |
553 | len = min_t(unsigned int, skb->len, count); |
554 | |
555 | if (copy_to_user(to: ptr, from: skb->data, n: len)) |
556 | return -EFAULT; |
557 | |
558 | if (!data->hdev) |
559 | return len; |
560 | |
561 | data->hdev->stat.byte_tx += len; |
562 | |
563 | switch (hci_skb_pkt_type(skb)) { |
564 | case HCI_COMMAND_PKT: |
565 | data->hdev->stat.cmd_tx++; |
566 | break; |
567 | case HCI_ACLDATA_PKT: |
568 | data->hdev->stat.acl_tx++; |
569 | break; |
570 | case HCI_SCODATA_PKT: |
571 | data->hdev->stat.sco_tx++; |
572 | break; |
573 | } |
574 | |
575 | return len; |
576 | } |
577 | |
578 | static ssize_t vhci_read(struct file *file, |
579 | char __user *buf, size_t count, loff_t *pos) |
580 | { |
581 | struct vhci_data *data = file->private_data; |
582 | struct sk_buff *skb; |
583 | ssize_t ret = 0; |
584 | |
585 | while (count) { |
586 | skb = skb_dequeue(list: &data->readq); |
587 | if (skb) { |
588 | ret = vhci_put_user(data, skb, buf, count); |
589 | if (ret < 0) |
590 | skb_queue_head(list: &data->readq, newsk: skb); |
591 | else |
592 | kfree_skb(skb); |
593 | break; |
594 | } |
595 | |
596 | if (file->f_flags & O_NONBLOCK) { |
597 | ret = -EAGAIN; |
598 | break; |
599 | } |
600 | |
601 | ret = wait_event_interruptible(data->read_wait, |
602 | !skb_queue_empty(&data->readq)); |
603 | if (ret < 0) |
604 | break; |
605 | } |
606 | |
607 | return ret; |
608 | } |
609 | |
610 | static ssize_t vhci_write(struct kiocb *iocb, struct iov_iter *from) |
611 | { |
612 | struct file *file = iocb->ki_filp; |
613 | struct vhci_data *data = file->private_data; |
614 | |
615 | return vhci_get_user(data, from); |
616 | } |
617 | |
618 | static __poll_t vhci_poll(struct file *file, poll_table *wait) |
619 | { |
620 | struct vhci_data *data = file->private_data; |
621 | |
622 | poll_wait(filp: file, wait_address: &data->read_wait, p: wait); |
623 | |
624 | if (!skb_queue_empty(list: &data->readq)) |
625 | return EPOLLIN | EPOLLRDNORM; |
626 | |
627 | return EPOLLOUT | EPOLLWRNORM; |
628 | } |
629 | |
630 | static void vhci_open_timeout(struct work_struct *work) |
631 | { |
632 | struct vhci_data *data = container_of(work, struct vhci_data, |
633 | open_timeout.work); |
634 | |
635 | vhci_create_device(data, opcode: amp ? HCI_AMP : HCI_PRIMARY); |
636 | } |
637 | |
638 | static int vhci_open(struct inode *inode, struct file *file) |
639 | { |
640 | struct vhci_data *data; |
641 | |
642 | data = kzalloc(size: sizeof(struct vhci_data), GFP_KERNEL); |
643 | if (!data) |
644 | return -ENOMEM; |
645 | |
646 | skb_queue_head_init(list: &data->readq); |
647 | init_waitqueue_head(&data->read_wait); |
648 | |
649 | mutex_init(&data->open_mutex); |
650 | INIT_DELAYED_WORK(&data->open_timeout, vhci_open_timeout); |
651 | INIT_WORK(&data->suspend_work, vhci_suspend_work); |
652 | |
653 | file->private_data = data; |
654 | nonseekable_open(inode, filp: file); |
655 | |
656 | schedule_delayed_work(dwork: &data->open_timeout, delay: msecs_to_jiffies(m: 1000)); |
657 | |
658 | return 0; |
659 | } |
660 | |
661 | static int vhci_release(struct inode *inode, struct file *file) |
662 | { |
663 | struct vhci_data *data = file->private_data; |
664 | struct hci_dev *hdev; |
665 | |
666 | cancel_delayed_work_sync(dwork: &data->open_timeout); |
667 | flush_work(work: &data->suspend_work); |
668 | |
669 | hdev = data->hdev; |
670 | |
671 | if (hdev) { |
672 | hci_unregister_dev(hdev); |
673 | hci_free_dev(hdev); |
674 | } |
675 | |
676 | skb_queue_purge(list: &data->readq); |
677 | file->private_data = NULL; |
678 | kfree(objp: data); |
679 | |
680 | return 0; |
681 | } |
682 | |
683 | static const struct file_operations vhci_fops = { |
684 | .owner = THIS_MODULE, |
685 | .read = vhci_read, |
686 | .write_iter = vhci_write, |
687 | .poll = vhci_poll, |
688 | .open = vhci_open, |
689 | .release = vhci_release, |
690 | .llseek = no_llseek, |
691 | }; |
692 | |
693 | static struct miscdevice vhci_miscdev = { |
694 | .name = "vhci" , |
695 | .fops = &vhci_fops, |
696 | .minor = VHCI_MINOR, |
697 | }; |
698 | module_misc_device(vhci_miscdev); |
699 | |
700 | module_param(amp, bool, 0644); |
701 | MODULE_PARM_DESC(amp, "Create AMP controller device" ); |
702 | |
703 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>" ); |
704 | MODULE_DESCRIPTION("Bluetooth virtual HCI driver ver " VERSION); |
705 | MODULE_VERSION(VERSION); |
706 | MODULE_LICENSE("GPL" ); |
707 | MODULE_ALIAS("devname:vhci" ); |
708 | MODULE_ALIAS_MISCDEV(VHCI_MINOR); |
709 | |