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Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
1da177e4 | 3 | * |
4aa769b9 MH |
4 | * Bluetooth virtual HCI driver |
5 | * | |
9c724357 MH |
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> | |
1da177e4 | 9 | */ |
1da177e4 | 10 | |
1da177e4 | 11 | #include <linux/module.h> |
23424c0d | 12 | #include <asm/unaligned.h> |
1da177e4 | 13 | |
769bf60e | 14 | #include <linux/atomic.h> |
1da177e4 | 15 | #include <linux/kernel.h> |
4aa769b9 | 16 | #include <linux/init.h> |
1da177e4 | 17 | #include <linux/slab.h> |
4aa769b9 MH |
18 | #include <linux/types.h> |
19 | #include <linux/errno.h> | |
20 | #include <linux/sched.h> | |
1da177e4 | 21 | #include <linux/poll.h> |
1da177e4 LT |
22 | |
23 | #include <linux/skbuff.h> | |
24 | #include <linux/miscdevice.h> | |
59c218ca | 25 | #include <linux/debugfs.h> |
1da177e4 | 26 | |
1da177e4 LT |
27 | #include <net/bluetooth/bluetooth.h> |
28 | #include <net/bluetooth/hci_core.h> | |
1da177e4 | 29 | |
82a30cfc | 30 | #define VERSION "1.5" |
4aa769b9 | 31 | |
36acbb1a AE |
32 | static bool amp; |
33 | ||
4aa769b9 MH |
34 | struct vhci_data { |
35 | struct hci_dev *hdev; | |
36 | ||
4aa769b9 MH |
37 | wait_queue_head_t read_wait; |
38 | struct sk_buff_head readq; | |
23424c0d | 39 | |
c7c999cb | 40 | struct mutex open_mutex; |
23424c0d | 41 | struct delayed_work open_timeout; |
d16e6d19 | 42 | struct work_struct suspend_work; |
59c218ca LAD |
43 | |
44 | bool suspended; | |
4539ca67 | 45 | bool wakeup; |
b8f5482c LAD |
46 | __u16 msft_opcode; |
47 | bool aosp_capable; | |
769bf60e | 48 | atomic_t initialized; |
4aa769b9 MH |
49 | }; |
50 | ||
4aa769b9 | 51 | static int vhci_open_dev(struct hci_dev *hdev) |
1da177e4 | 52 | { |
1da177e4 LT |
53 | return 0; |
54 | } | |
55 | ||
4aa769b9 | 56 | static int vhci_close_dev(struct hci_dev *hdev) |
1da177e4 | 57 | { |
155961e8 | 58 | struct vhci_data *data = hci_get_drvdata(hdev); |
4aa769b9 | 59 | |
9c724357 | 60 | skb_queue_purge(&data->readq); |
4aa769b9 | 61 | |
1da177e4 LT |
62 | return 0; |
63 | } | |
64 | ||
4aa769b9 | 65 | static int vhci_flush(struct hci_dev *hdev) |
1da177e4 | 66 | { |
155961e8 | 67 | struct vhci_data *data = hci_get_drvdata(hdev); |
1da177e4 | 68 | |
9c724357 | 69 | skb_queue_purge(&data->readq); |
1da177e4 | 70 | |
4aa769b9 | 71 | return 0; |
1da177e4 LT |
72 | } |
73 | ||
7bd8f09f | 74 | static int vhci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
1da177e4 | 75 | { |
60298775 | 76 | struct vhci_data *data = hci_get_drvdata(hdev); |
1da177e4 | 77 | |
618e8bc2 | 78 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
92d4abd6 | 79 | |
9c724357 | 80 | skb_queue_tail(&data->readq, skb); |
4aa769b9 | 81 | |
769bf60e YH |
82 | if (atomic_read(&data->initialized)) |
83 | wake_up_interruptible(&data->read_wait); | |
23424c0d MH |
84 | return 0; |
85 | } | |
86 | ||
9682d36c K |
87 | static int vhci_get_data_path_id(struct hci_dev *hdev, u8 *data_path_id) |
88 | { | |
89 | *data_path_id = 0; | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static int vhci_get_codec_config_data(struct hci_dev *hdev, __u8 type, | |
94 | struct bt_codec *codec, __u8 *vnd_len, | |
95 | __u8 **vnd_data) | |
96 | { | |
97 | if (type != ESCO_LINK) | |
98 | return -EINVAL; | |
99 | ||
100 | *vnd_len = 0; | |
101 | *vnd_data = NULL; | |
102 | return 0; | |
103 | } | |
104 | ||
4539ca67 | 105 | static bool vhci_wakeup(struct hci_dev *hdev) |
60edfad4 LAD |
106 | { |
107 | struct vhci_data *data = hci_get_drvdata(hdev); | |
108 | ||
4539ca67 | 109 | return data->wakeup; |
60edfad4 LAD |
110 | } |
111 | ||
59c218ca LAD |
112 | static ssize_t force_suspend_read(struct file *file, char __user *user_buf, |
113 | size_t count, loff_t *ppos) | |
114 | { | |
115 | struct vhci_data *data = file->private_data; | |
116 | char buf[3]; | |
117 | ||
118 | buf[0] = data->suspended ? 'Y' : 'N'; | |
119 | buf[1] = '\n'; | |
120 | buf[2] = '\0'; | |
121 | return simple_read_from_buffer(user_buf, count, ppos, buf, 2); | |
122 | } | |
123 | ||
d16e6d19 LAD |
124 | static void vhci_suspend_work(struct work_struct *work) |
125 | { | |
126 | struct vhci_data *data = container_of(work, struct vhci_data, | |
127 | suspend_work); | |
128 | ||
129 | if (data->suspended) | |
130 | hci_suspend_dev(data->hdev); | |
131 | else | |
132 | hci_resume_dev(data->hdev); | |
133 | } | |
134 | ||
59c218ca LAD |
135 | static ssize_t force_suspend_write(struct file *file, |
136 | const char __user *user_buf, | |
137 | size_t count, loff_t *ppos) | |
138 | { | |
139 | struct vhci_data *data = file->private_data; | |
140 | bool enable; | |
141 | int err; | |
142 | ||
143 | err = kstrtobool_from_user(user_buf, count, &enable); | |
144 | if (err) | |
145 | return err; | |
146 | ||
147 | if (data->suspended == enable) | |
148 | return -EALREADY; | |
149 | ||
59c218ca LAD |
150 | data->suspended = enable; |
151 | ||
d16e6d19 LAD |
152 | schedule_work(&data->suspend_work); |
153 | ||
59c218ca LAD |
154 | return count; |
155 | } | |
156 | ||
157 | static const struct file_operations force_suspend_fops = { | |
158 | .open = simple_open, | |
159 | .read = force_suspend_read, | |
160 | .write = force_suspend_write, | |
161 | .llseek = default_llseek, | |
162 | }; | |
163 | ||
4539ca67 LAD |
164 | static ssize_t force_wakeup_read(struct file *file, char __user *user_buf, |
165 | size_t count, loff_t *ppos) | |
60edfad4 LAD |
166 | { |
167 | struct vhci_data *data = file->private_data; | |
168 | char buf[3]; | |
169 | ||
4539ca67 | 170 | buf[0] = data->wakeup ? 'Y' : 'N'; |
60edfad4 LAD |
171 | buf[1] = '\n'; |
172 | buf[2] = '\0'; | |
173 | return simple_read_from_buffer(user_buf, count, ppos, buf, 2); | |
174 | } | |
175 | ||
4539ca67 LAD |
176 | static ssize_t force_wakeup_write(struct file *file, |
177 | const char __user *user_buf, size_t count, | |
178 | loff_t *ppos) | |
60edfad4 LAD |
179 | { |
180 | struct vhci_data *data = file->private_data; | |
181 | bool enable; | |
182 | int err; | |
183 | ||
184 | err = kstrtobool_from_user(user_buf, count, &enable); | |
185 | if (err) | |
186 | return err; | |
187 | ||
4539ca67 | 188 | if (data->wakeup == enable) |
60edfad4 LAD |
189 | return -EALREADY; |
190 | ||
8b89637d THJA |
191 | data->wakeup = enable; |
192 | ||
60edfad4 LAD |
193 | return count; |
194 | } | |
195 | ||
4539ca67 | 196 | static const struct file_operations force_wakeup_fops = { |
60edfad4 | 197 | .open = simple_open, |
4539ca67 LAD |
198 | .read = force_wakeup_read, |
199 | .write = force_wakeup_write, | |
60edfad4 LAD |
200 | .llseek = default_llseek, |
201 | }; | |
202 | ||
b8f5482c LAD |
203 | static int msft_opcode_set(void *data, u64 val) |
204 | { | |
205 | struct vhci_data *vhci = data; | |
206 | ||
f33b0068 | 207 | if (val > 0xffff || hci_opcode_ogf(val) != 0x3f) |
b8f5482c LAD |
208 | return -EINVAL; |
209 | ||
210 | if (vhci->msft_opcode) | |
211 | return -EALREADY; | |
212 | ||
213 | vhci->msft_opcode = val; | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | static int msft_opcode_get(void *data, u64 *val) | |
219 | { | |
220 | struct vhci_data *vhci = data; | |
221 | ||
222 | *val = vhci->msft_opcode; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | DEFINE_DEBUGFS_ATTRIBUTE(msft_opcode_fops, msft_opcode_get, msft_opcode_set, | |
228 | "%llu\n"); | |
229 | ||
230 | static ssize_t aosp_capable_read(struct file *file, char __user *user_buf, | |
231 | size_t count, loff_t *ppos) | |
232 | { | |
233 | struct vhci_data *vhci = file->private_data; | |
234 | char buf[3]; | |
235 | ||
236 | buf[0] = vhci->aosp_capable ? 'Y' : 'N'; | |
237 | buf[1] = '\n'; | |
238 | buf[2] = '\0'; | |
239 | return simple_read_from_buffer(user_buf, count, ppos, buf, 2); | |
240 | } | |
241 | ||
242 | static ssize_t aosp_capable_write(struct file *file, | |
243 | const char __user *user_buf, size_t count, | |
244 | loff_t *ppos) | |
245 | { | |
246 | struct vhci_data *vhci = file->private_data; | |
247 | bool enable; | |
248 | int err; | |
249 | ||
250 | err = kstrtobool_from_user(user_buf, count, &enable); | |
251 | if (err) | |
252 | return err; | |
253 | ||
254 | if (!enable) | |
255 | return -EINVAL; | |
256 | ||
257 | if (vhci->aosp_capable) | |
258 | return -EALREADY; | |
259 | ||
260 | vhci->aosp_capable = enable; | |
261 | ||
262 | return count; | |
263 | } | |
264 | ||
265 | static const struct file_operations aosp_capable_fops = { | |
266 | .open = simple_open, | |
267 | .read = aosp_capable_read, | |
268 | .write = aosp_capable_write, | |
269 | .llseek = default_llseek, | |
270 | }; | |
271 | ||
272 | static int vhci_setup(struct hci_dev *hdev) | |
273 | { | |
274 | struct vhci_data *vhci = hci_get_drvdata(hdev); | |
275 | ||
276 | if (vhci->msft_opcode) | |
277 | hci_set_msft_opcode(hdev, vhci->msft_opcode); | |
278 | ||
279 | if (vhci->aosp_capable) | |
280 | hci_set_aosp_capable(hdev); | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
ab4e4380 MM |
285 | static void vhci_coredump(struct hci_dev *hdev) |
286 | { | |
287 | /* No need to do anything */ | |
288 | } | |
289 | ||
290 | static void vhci_coredump_hdr(struct hci_dev *hdev, struct sk_buff *skb) | |
291 | { | |
292 | char buf[80]; | |
293 | ||
294 | snprintf(buf, sizeof(buf), "Controller Name: vhci_ctrl\n"); | |
295 | skb_put_data(skb, buf, strlen(buf)); | |
296 | ||
297 | snprintf(buf, sizeof(buf), "Firmware Version: vhci_fw\n"); | |
298 | skb_put_data(skb, buf, strlen(buf)); | |
299 | ||
300 | snprintf(buf, sizeof(buf), "Driver: vhci_drv\n"); | |
301 | skb_put_data(skb, buf, strlen(buf)); | |
302 | ||
303 | snprintf(buf, sizeof(buf), "Vendor: vhci\n"); | |
304 | skb_put_data(skb, buf, strlen(buf)); | |
305 | } | |
306 | ||
307 | #define MAX_COREDUMP_LINE_LEN 40 | |
308 | ||
309 | struct devcoredump_test_data { | |
310 | enum devcoredump_state state; | |
311 | unsigned int timeout; | |
312 | char data[MAX_COREDUMP_LINE_LEN]; | |
313 | }; | |
314 | ||
315 | static inline void force_devcd_timeout(struct hci_dev *hdev, | |
316 | unsigned int timeout) | |
317 | { | |
318 | #ifdef CONFIG_DEV_COREDUMP | |
319 | hdev->dump.timeout = msecs_to_jiffies(timeout * 1000); | |
320 | #endif | |
321 | } | |
322 | ||
323 | static ssize_t force_devcd_write(struct file *file, const char __user *user_buf, | |
324 | size_t count, loff_t *ppos) | |
325 | { | |
326 | struct vhci_data *data = file->private_data; | |
327 | struct hci_dev *hdev = data->hdev; | |
328 | struct sk_buff *skb = NULL; | |
329 | struct devcoredump_test_data dump_data; | |
e4eea890 | 330 | size_t data_size; |
ab4e4380 MM |
331 | int ret; |
332 | ||
e4eea890 DC |
333 | if (count < offsetof(struct devcoredump_test_data, data) || |
334 | count > sizeof(dump_data)) | |
335 | return -EINVAL; | |
336 | ||
337 | if (copy_from_user(&dump_data, user_buf, count)) | |
338 | return -EFAULT; | |
ab4e4380 | 339 | |
e4eea890 DC |
340 | data_size = count - offsetof(struct devcoredump_test_data, data); |
341 | skb = alloc_skb(data_size, GFP_ATOMIC); | |
ab4e4380 MM |
342 | if (!skb) |
343 | return -ENOMEM; | |
e4eea890 | 344 | skb_put_data(skb, &dump_data.data, data_size); |
ab4e4380 MM |
345 | |
346 | hci_devcd_register(hdev, vhci_coredump, vhci_coredump_hdr, NULL); | |
347 | ||
348 | /* Force the devcoredump timeout */ | |
349 | if (dump_data.timeout) | |
350 | force_devcd_timeout(hdev, dump_data.timeout); | |
351 | ||
352 | ret = hci_devcd_init(hdev, skb->len); | |
353 | if (ret) { | |
354 | BT_ERR("Failed to generate devcoredump"); | |
355 | kfree_skb(skb); | |
356 | return ret; | |
357 | } | |
358 | ||
359 | hci_devcd_append(hdev, skb); | |
360 | ||
361 | switch (dump_data.state) { | |
362 | case HCI_DEVCOREDUMP_DONE: | |
363 | hci_devcd_complete(hdev); | |
364 | break; | |
365 | case HCI_DEVCOREDUMP_ABORT: | |
366 | hci_devcd_abort(hdev); | |
367 | break; | |
368 | case HCI_DEVCOREDUMP_TIMEOUT: | |
369 | /* Do nothing */ | |
370 | break; | |
371 | default: | |
372 | return -EINVAL; | |
373 | } | |
374 | ||
375 | return count; | |
376 | } | |
377 | ||
378 | static const struct file_operations force_devcoredump_fops = { | |
379 | .open = simple_open, | |
380 | .write = force_devcd_write, | |
381 | }; | |
382 | ||
c7c999cb | 383 | static int __vhci_create_device(struct vhci_data *data, __u8 opcode) |
23424c0d MH |
384 | { |
385 | struct hci_dev *hdev; | |
386 | struct sk_buff *skb; | |
82a30cfc | 387 | |
c7c999cb TI |
388 | if (data->hdev) |
389 | return -EBADFD; | |
390 | ||
0ad184ef MH |
391 | /* bits 2-5 are reserved (must be zero) */ |
392 | if (opcode & 0x3c) | |
82a30cfc | 393 | return -EINVAL; |
23424c0d MH |
394 | |
395 | skb = bt_skb_alloc(4, GFP_KERNEL); | |
396 | if (!skb) | |
397 | return -ENOMEM; | |
398 | ||
399 | hdev = hci_alloc_dev(); | |
400 | if (!hdev) { | |
401 | kfree_skb(skb); | |
402 | return -ENOMEM; | |
403 | } | |
404 | ||
405 | data->hdev = hdev; | |
406 | ||
407 | hdev->bus = HCI_VIRTUAL; | |
23424c0d MH |
408 | hci_set_drvdata(hdev, data); |
409 | ||
410 | hdev->open = vhci_open_dev; | |
411 | hdev->close = vhci_close_dev; | |
412 | hdev->flush = vhci_flush; | |
413 | hdev->send = vhci_send_frame; | |
9682d36c K |
414 | hdev->get_data_path_id = vhci_get_data_path_id; |
415 | hdev->get_codec_config_data = vhci_get_codec_config_data; | |
4539ca67 | 416 | hdev->wakeup = vhci_wakeup; |
b8f5482c LAD |
417 | hdev->setup = vhci_setup; |
418 | set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); | |
1da177e4 | 419 | |
0ad184ef MH |
420 | /* bit 6 is for external configuration */ |
421 | if (opcode & 0x40) | |
422 | set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); | |
423 | ||
82a30cfc MH |
424 | /* bit 7 is for raw device */ |
425 | if (opcode & 0x80) | |
426 | set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); | |
427 | ||
cfb4c313 LAD |
428 | set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks); |
429 | ||
23424c0d MH |
430 | if (hci_register_dev(hdev) < 0) { |
431 | BT_ERR("Can't register HCI device"); | |
432 | hci_free_dev(hdev); | |
433 | data->hdev = NULL; | |
434 | kfree_skb(skb); | |
435 | return -EBUSY; | |
436 | } | |
437 | ||
59c218ca LAD |
438 | debugfs_create_file("force_suspend", 0644, hdev->debugfs, data, |
439 | &force_suspend_fops); | |
440 | ||
4539ca67 LAD |
441 | debugfs_create_file("force_wakeup", 0644, hdev->debugfs, data, |
442 | &force_wakeup_fops); | |
60edfad4 | 443 | |
b8f5482c LAD |
444 | if (IS_ENABLED(CONFIG_BT_MSFTEXT)) |
445 | debugfs_create_file("msft_opcode", 0644, hdev->debugfs, data, | |
446 | &msft_opcode_fops); | |
447 | ||
448 | if (IS_ENABLED(CONFIG_BT_AOSPEXT)) | |
449 | debugfs_create_file("aosp_capable", 0644, hdev->debugfs, data, | |
450 | &aosp_capable_fops); | |
451 | ||
ab4e4380 MM |
452 | debugfs_create_file("force_devcoredump", 0644, hdev->debugfs, data, |
453 | &force_devcoredump_fops); | |
454 | ||
618e8bc2 | 455 | hci_skb_pkt_type(skb) = HCI_VENDOR_PKT; |
23424c0d | 456 | |
634fef61 JB |
457 | skb_put_u8(skb, 0xff); |
458 | skb_put_u8(skb, opcode); | |
23424c0d | 459 | put_unaligned_le16(hdev->id, skb_put(skb, 2)); |
769bf60e YH |
460 | skb_queue_head(&data->readq, skb); |
461 | atomic_inc(&data->initialized); | |
23424c0d MH |
462 | |
463 | wake_up_interruptible(&data->read_wait); | |
1da177e4 LT |
464 | return 0; |
465 | } | |
466 | ||
c7c999cb TI |
467 | static int vhci_create_device(struct vhci_data *data, __u8 opcode) |
468 | { | |
469 | int err; | |
470 | ||
471 | mutex_lock(&data->open_mutex); | |
472 | err = __vhci_create_device(data, opcode); | |
473 | mutex_unlock(&data->open_mutex); | |
474 | ||
475 | return err; | |
476 | } | |
477 | ||
9c724357 | 478 | static inline ssize_t vhci_get_user(struct vhci_data *data, |
512b2268 | 479 | struct iov_iter *from) |
1da177e4 | 480 | { |
512b2268 | 481 | size_t len = iov_iter_count(from); |
1da177e4 | 482 | struct sk_buff *skb; |
82a30cfc | 483 | __u8 pkt_type, opcode; |
23424c0d | 484 | int ret; |
1da177e4 | 485 | |
5bc00b5c | 486 | if (len < 2 || len > HCI_MAX_FRAME_SIZE) |
1da177e4 LT |
487 | return -EINVAL; |
488 | ||
5bc00b5c | 489 | skb = bt_skb_alloc(len, GFP_KERNEL); |
4aa769b9 | 490 | if (!skb) |
1da177e4 | 491 | return -ENOMEM; |
4aa769b9 | 492 | |
cbbd26b8 | 493 | if (!copy_from_iter_full(skb_put(skb, len), len, from)) { |
512b2268 AV |
494 | kfree_skb(skb); |
495 | return -EFAULT; | |
1da177e4 LT |
496 | } |
497 | ||
23424c0d | 498 | pkt_type = *((__u8 *) skb->data); |
1da177e4 LT |
499 | skb_pull(skb, 1); |
500 | ||
23424c0d MH |
501 | switch (pkt_type) { |
502 | case HCI_EVENT_PKT: | |
503 | case HCI_ACLDATA_PKT: | |
504 | case HCI_SCODATA_PKT: | |
f92a8cb5 | 505 | case HCI_ISODATA_PKT: |
23424c0d MH |
506 | if (!data->hdev) { |
507 | kfree_skb(skb); | |
508 | return -ENODEV; | |
509 | } | |
510 | ||
618e8bc2 | 511 | hci_skb_pkt_type(skb) = pkt_type; |
23424c0d | 512 | |
e1a26170 | 513 | ret = hci_recv_frame(data->hdev, skb); |
23424c0d MH |
514 | break; |
515 | ||
516 | case HCI_VENDOR_PKT: | |
373a32c8 JS |
517 | cancel_delayed_work_sync(&data->open_timeout); |
518 | ||
82a30cfc | 519 | opcode = *((__u8 *) skb->data); |
23424c0d MH |
520 | skb_pull(skb, 1); |
521 | ||
522 | if (skb->len > 0) { | |
523 | kfree_skb(skb); | |
524 | return -EINVAL; | |
525 | } | |
526 | ||
527 | kfree_skb(skb); | |
528 | ||
82a30cfc | 529 | ret = vhci_create_device(data, opcode); |
23424c0d MH |
530 | break; |
531 | ||
532 | default: | |
533 | kfree_skb(skb); | |
534 | return -EINVAL; | |
535 | } | |
536 | ||
5bc00b5c | 537 | return (ret < 0) ? ret : len; |
1da177e4 LT |
538 | } |
539 | ||
9c724357 | 540 | static inline ssize_t vhci_put_user(struct vhci_data *data, |
23424c0d MH |
541 | struct sk_buff *skb, |
542 | char __user *buf, int count) | |
1da177e4 | 543 | { |
1da177e4 | 544 | char __user *ptr = buf; |
23424c0d | 545 | int len; |
4aa769b9 MH |
546 | |
547 | len = min_t(unsigned int, skb->len, count); | |
1da177e4 | 548 | |
1da177e4 LT |
549 | if (copy_to_user(ptr, skb->data, len)) |
550 | return -EFAULT; | |
4aa769b9 | 551 | |
23424c0d MH |
552 | if (!data->hdev) |
553 | return len; | |
1da177e4 | 554 | |
9c724357 | 555 | data->hdev->stat.byte_tx += len; |
4aa769b9 | 556 | |
618e8bc2 | 557 | switch (hci_skb_pkt_type(skb)) { |
0d48d939 | 558 | case HCI_COMMAND_PKT: |
9c724357 | 559 | data->hdev->stat.cmd_tx++; |
0d48d939 | 560 | break; |
0d48d939 | 561 | case HCI_ACLDATA_PKT: |
9c724357 | 562 | data->hdev->stat.acl_tx++; |
0d48d939 | 563 | break; |
0d48d939 | 564 | case HCI_SCODATA_PKT: |
4f7ac181 | 565 | data->hdev->stat.sco_tx++; |
0d48d939 | 566 | break; |
2c24d454 | 567 | } |
1da177e4 | 568 | |
23424c0d | 569 | return len; |
1da177e4 LT |
570 | } |
571 | ||
9c724357 | 572 | static ssize_t vhci_read(struct file *file, |
23424c0d | 573 | char __user *buf, size_t count, loff_t *pos) |
1da177e4 | 574 | { |
9c724357 | 575 | struct vhci_data *data = file->private_data; |
1da177e4 LT |
576 | struct sk_buff *skb; |
577 | ssize_t ret = 0; | |
578 | ||
1da177e4 | 579 | while (count) { |
9c724357 | 580 | skb = skb_dequeue(&data->readq); |
4db7589f MH |
581 | if (skb) { |
582 | ret = vhci_put_user(data, skb, buf, count); | |
583 | if (ret < 0) | |
584 | skb_queue_head(&data->readq, skb); | |
585 | else | |
586 | kfree_skb(skb); | |
587 | break; | |
1da177e4 LT |
588 | } |
589 | ||
4db7589f MH |
590 | if (file->f_flags & O_NONBLOCK) { |
591 | ret = -EAGAIN; | |
592 | break; | |
593 | } | |
1da177e4 | 594 | |
4db7589f | 595 | ret = wait_event_interruptible(data->read_wait, |
23424c0d | 596 | !skb_queue_empty(&data->readq)); |
4db7589f MH |
597 | if (ret < 0) |
598 | break; | |
1da177e4 | 599 | } |
1da177e4 LT |
600 | |
601 | return ret; | |
602 | } | |
603 | ||
512b2268 | 604 | static ssize_t vhci_write(struct kiocb *iocb, struct iov_iter *from) |
1da177e4 | 605 | { |
5bc00b5c | 606 | struct file *file = iocb->ki_filp; |
9c724357 | 607 | struct vhci_data *data = file->private_data; |
1da177e4 | 608 | |
512b2268 | 609 | return vhci_get_user(data, from); |
1da177e4 LT |
610 | } |
611 | ||
afc9a42b | 612 | static __poll_t vhci_poll(struct file *file, poll_table *wait) |
1da177e4 | 613 | { |
9c724357 | 614 | struct vhci_data *data = file->private_data; |
1da177e4 | 615 | |
9c724357 | 616 | poll_wait(file, &data->read_wait, wait); |
1da177e4 | 617 | |
9c724357 | 618 | if (!skb_queue_empty(&data->readq)) |
a9a08845 | 619 | return EPOLLIN | EPOLLRDNORM; |
4aa769b9 | 620 | |
a9a08845 | 621 | return EPOLLOUT | EPOLLWRNORM; |
4aa769b9 MH |
622 | } |
623 | ||
23424c0d MH |
624 | static void vhci_open_timeout(struct work_struct *work) |
625 | { | |
626 | struct vhci_data *data = container_of(work, struct vhci_data, | |
627 | open_timeout.work); | |
628 | ||
84a4bb65 | 629 | vhci_create_device(data, 0x00); |
23424c0d MH |
630 | } |
631 | ||
4aa769b9 | 632 | static int vhci_open(struct inode *inode, struct file *file) |
1da177e4 | 633 | { |
9c724357 | 634 | struct vhci_data *data; |
1da177e4 | 635 | |
9c724357 MH |
636 | data = kzalloc(sizeof(struct vhci_data), GFP_KERNEL); |
637 | if (!data) | |
1da177e4 LT |
638 | return -ENOMEM; |
639 | ||
9c724357 MH |
640 | skb_queue_head_init(&data->readq); |
641 | init_waitqueue_head(&data->read_wait); | |
1da177e4 | 642 | |
c7c999cb | 643 | mutex_init(&data->open_mutex); |
23424c0d | 644 | INIT_DELAYED_WORK(&data->open_timeout, vhci_open_timeout); |
d16e6d19 | 645 | INIT_WORK(&data->suspend_work, vhci_suspend_work); |
1da177e4 | 646 | |
9c724357 | 647 | file->private_data = data; |
0dea0141 | 648 | nonseekable_open(inode, file); |
4aa769b9 | 649 | |
23424c0d MH |
650 | schedule_delayed_work(&data->open_timeout, msecs_to_jiffies(1000)); |
651 | ||
0dea0141 | 652 | return 0; |
1da177e4 LT |
653 | } |
654 | ||
4aa769b9 | 655 | static int vhci_release(struct inode *inode, struct file *file) |
1da177e4 | 656 | { |
9c724357 | 657 | struct vhci_data *data = file->private_data; |
373a32c8 | 658 | struct hci_dev *hdev; |
1da177e4 | 659 | |
23424c0d | 660 | cancel_delayed_work_sync(&data->open_timeout); |
d16e6d19 | 661 | flush_work(&data->suspend_work); |
23424c0d | 662 | |
373a32c8 JS |
663 | hdev = data->hdev; |
664 | ||
23424c0d MH |
665 | if (hdev) { |
666 | hci_unregister_dev(hdev); | |
667 | hci_free_dev(hdev); | |
668 | } | |
1da177e4 | 669 | |
13407376 | 670 | skb_queue_purge(&data->readq); |
1da177e4 | 671 | file->private_data = NULL; |
bf18c711 | 672 | kfree(data); |
4aa769b9 MH |
673 | |
674 | return 0; | |
675 | } | |
676 | ||
2b8693c0 | 677 | static const struct file_operations vhci_fops = { |
fed4c250 | 678 | .owner = THIS_MODULE, |
4aa769b9 | 679 | .read = vhci_read, |
512b2268 | 680 | .write_iter = vhci_write, |
4aa769b9 | 681 | .poll = vhci_poll, |
4aa769b9 MH |
682 | .open = vhci_open, |
683 | .release = vhci_release, | |
6038f373 | 684 | .llseek = no_llseek, |
1da177e4 LT |
685 | }; |
686 | ||
4eeab599 | 687 | static struct miscdevice vhci_miscdev = { |
ac28494c MH |
688 | .name = "vhci", |
689 | .fops = &vhci_fops, | |
b075dd40 | 690 | .minor = VHCI_MINOR, |
1da177e4 | 691 | }; |
d6a38c0b | 692 | module_misc_device(vhci_miscdev); |
4aa769b9 | 693 | |
36acbb1a AE |
694 | module_param(amp, bool, 0644); |
695 | MODULE_PARM_DESC(amp, "Create AMP controller device"); | |
696 | ||
63fbd24e | 697 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
4aa769b9 MH |
698 | MODULE_DESCRIPTION("Bluetooth virtual HCI driver ver " VERSION); |
699 | MODULE_VERSION(VERSION); | |
700 | MODULE_LICENSE("GPL"); | |
bfacbb9a | 701 | MODULE_ALIAS("devname:vhci"); |
b075dd40 | 702 | MODULE_ALIAS_MISCDEV(VHCI_MINOR); |