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2025cf9e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b95f5bcb S |
2 | /* |
3 | * Copyright (c) 2009, Citrix Systems, Inc. | |
4 | * Copyright (c) 2010, Microsoft Corporation. | |
5 | * Copyright (c) 2011, Novell Inc. | |
b95f5bcb S |
6 | */ |
7 | #include <linux/init.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/device.h> | |
10 | #include <linux/completion.h> | |
11 | #include <linux/input.h> | |
12 | #include <linux/hid.h> | |
13 | #include <linux/hiddev.h> | |
14 | #include <linux/hyperv.h> | |
15 | ||
16 | ||
17 | struct hv_input_dev_info { | |
18 | unsigned int size; | |
19 | unsigned short vendor; | |
20 | unsigned short product; | |
21 | unsigned short version; | |
22 | unsigned short reserved[11]; | |
23 | }; | |
24 | ||
25 | /* The maximum size of a synthetic input message. */ | |
26 | #define SYNTHHID_MAX_INPUT_REPORT_SIZE 16 | |
27 | ||
28 | /* | |
29 | * Current version | |
30 | * | |
31 | * History: | |
32 | * Beta, RC < 2008/1/22 1,0 | |
33 | * RC > 2008/1/22 2,0 | |
34 | */ | |
35 | #define SYNTHHID_INPUT_VERSION_MAJOR 2 | |
36 | #define SYNTHHID_INPUT_VERSION_MINOR 0 | |
37 | #define SYNTHHID_INPUT_VERSION (SYNTHHID_INPUT_VERSION_MINOR | \ | |
38 | (SYNTHHID_INPUT_VERSION_MAJOR << 16)) | |
39 | ||
40 | ||
41 | #pragma pack(push, 1) | |
42 | /* | |
43 | * Message types in the synthetic input protocol | |
44 | */ | |
45 | enum synthhid_msg_type { | |
46 | SYNTH_HID_PROTOCOL_REQUEST, | |
47 | SYNTH_HID_PROTOCOL_RESPONSE, | |
48 | SYNTH_HID_INITIAL_DEVICE_INFO, | |
49 | SYNTH_HID_INITIAL_DEVICE_INFO_ACK, | |
50 | SYNTH_HID_INPUT_REPORT, | |
51 | SYNTH_HID_MAX | |
52 | }; | |
53 | ||
54 | /* | |
55 | * Basic message structures. | |
56 | */ | |
57 | struct synthhid_msg_hdr { | |
58 | enum synthhid_msg_type type; | |
59 | u32 size; | |
60 | }; | |
61 | ||
62 | struct synthhid_msg { | |
63 | struct synthhid_msg_hdr header; | |
64 | char data[1]; /* Enclosed message */ | |
65 | }; | |
66 | ||
67 | union synthhid_version { | |
68 | struct { | |
69 | u16 minor_version; | |
70 | u16 major_version; | |
71 | }; | |
72 | u32 version; | |
73 | }; | |
74 | ||
75 | /* | |
76 | * Protocol messages | |
77 | */ | |
78 | struct synthhid_protocol_request { | |
79 | struct synthhid_msg_hdr header; | |
80 | union synthhid_version version_requested; | |
81 | }; | |
82 | ||
83 | struct synthhid_protocol_response { | |
84 | struct synthhid_msg_hdr header; | |
85 | union synthhid_version version_requested; | |
86 | unsigned char approved; | |
87 | }; | |
88 | ||
89 | struct synthhid_device_info { | |
90 | struct synthhid_msg_hdr header; | |
91 | struct hv_input_dev_info hid_dev_info; | |
92 | struct hid_descriptor hid_descriptor; | |
93 | }; | |
94 | ||
95 | struct synthhid_device_info_ack { | |
96 | struct synthhid_msg_hdr header; | |
97 | unsigned char reserved; | |
98 | }; | |
99 | ||
100 | struct synthhid_input_report { | |
101 | struct synthhid_msg_hdr header; | |
102 | char buffer[1]; | |
103 | }; | |
104 | ||
105 | #pragma pack(pop) | |
106 | ||
345f0254 MN |
107 | #define INPUTVSC_SEND_RING_BUFFER_SIZE (40 * 1024) |
108 | #define INPUTVSC_RECV_RING_BUFFER_SIZE (40 * 1024) | |
b95f5bcb S |
109 | |
110 | ||
111 | enum pipe_prot_msg_type { | |
112 | PIPE_MESSAGE_INVALID, | |
113 | PIPE_MESSAGE_DATA, | |
114 | PIPE_MESSAGE_MAXIMUM | |
115 | }; | |
116 | ||
117 | ||
118 | struct pipe_prt_msg { | |
119 | enum pipe_prot_msg_type type; | |
120 | u32 size; | |
121 | char data[1]; | |
122 | }; | |
123 | ||
124 | struct mousevsc_prt_msg { | |
125 | enum pipe_prot_msg_type type; | |
126 | u32 size; | |
127 | union { | |
128 | struct synthhid_protocol_request request; | |
129 | struct synthhid_protocol_response response; | |
130 | struct synthhid_device_info_ack ack; | |
131 | }; | |
132 | }; | |
133 | ||
134 | /* | |
135 | * Represents an mousevsc device | |
136 | */ | |
137 | struct mousevsc_dev { | |
138 | struct hv_device *device; | |
139 | bool init_complete; | |
140 | bool connected; | |
141 | struct mousevsc_prt_msg protocol_req; | |
142 | struct mousevsc_prt_msg protocol_resp; | |
143 | /* Synchronize the request/response if needed */ | |
144 | struct completion wait_event; | |
145 | int dev_info_status; | |
146 | ||
147 | struct hid_descriptor *hid_desc; | |
148 | unsigned char *report_desc; | |
149 | u32 report_desc_size; | |
150 | struct hv_input_dev_info hid_dev_info; | |
151 | struct hid_device *hid_device; | |
3ccfd0a8 | 152 | u8 input_buf[HID_MAX_BUFFER_SIZE]; |
b95f5bcb S |
153 | }; |
154 | ||
155 | ||
156 | static struct mousevsc_dev *mousevsc_alloc_device(struct hv_device *device) | |
157 | { | |
158 | struct mousevsc_dev *input_dev; | |
159 | ||
160 | input_dev = kzalloc(sizeof(struct mousevsc_dev), GFP_KERNEL); | |
161 | ||
162 | if (!input_dev) | |
163 | return NULL; | |
164 | ||
165 | input_dev->device = device; | |
166 | hv_set_drvdata(device, input_dev); | |
167 | init_completion(&input_dev->wait_event); | |
168 | input_dev->init_complete = false; | |
169 | ||
170 | return input_dev; | |
171 | } | |
172 | ||
173 | static void mousevsc_free_device(struct mousevsc_dev *device) | |
174 | { | |
175 | kfree(device->hid_desc); | |
176 | kfree(device->report_desc); | |
177 | hv_set_drvdata(device->device, NULL); | |
178 | kfree(device); | |
179 | } | |
180 | ||
181 | static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device, | |
182 | struct synthhid_device_info *device_info) | |
183 | { | |
184 | int ret = 0; | |
185 | struct hid_descriptor *desc; | |
186 | struct mousevsc_prt_msg ack; | |
187 | ||
188 | input_device->dev_info_status = -ENOMEM; | |
189 | ||
190 | input_device->hid_dev_info = device_info->hid_dev_info; | |
191 | desc = &device_info->hid_descriptor; | |
192 | if (desc->bLength == 0) | |
193 | goto cleanup; | |
194 | ||
af13f9ed | 195 | /* The pointer is not NULL when we resume from hibernation */ |
5313b2a5 | 196 | kfree(input_device->hid_desc); |
a4a23f6d | 197 | input_device->hid_desc = kmemdup(desc, desc->bLength, GFP_ATOMIC); |
b95f5bcb S |
198 | |
199 | if (!input_device->hid_desc) | |
200 | goto cleanup; | |
201 | ||
b95f5bcb S |
202 | input_device->report_desc_size = desc->desc[0].wDescriptorLength; |
203 | if (input_device->report_desc_size == 0) { | |
204 | input_device->dev_info_status = -EINVAL; | |
205 | goto cleanup; | |
206 | } | |
207 | ||
af13f9ed | 208 | /* The pointer is not NULL when we resume from hibernation */ |
5313b2a5 | 209 | kfree(input_device->report_desc); |
b95f5bcb S |
210 | input_device->report_desc = kzalloc(input_device->report_desc_size, |
211 | GFP_ATOMIC); | |
212 | ||
213 | if (!input_device->report_desc) { | |
214 | input_device->dev_info_status = -ENOMEM; | |
215 | goto cleanup; | |
216 | } | |
217 | ||
218 | memcpy(input_device->report_desc, | |
219 | ((unsigned char *)desc) + desc->bLength, | |
220 | desc->desc[0].wDescriptorLength); | |
221 | ||
222 | /* Send the ack */ | |
223 | memset(&ack, 0, sizeof(struct mousevsc_prt_msg)); | |
224 | ||
225 | ack.type = PIPE_MESSAGE_DATA; | |
226 | ack.size = sizeof(struct synthhid_device_info_ack); | |
227 | ||
228 | ack.ack.header.type = SYNTH_HID_INITIAL_DEVICE_INFO_ACK; | |
229 | ack.ack.header.size = 1; | |
230 | ack.ack.reserved = 0; | |
231 | ||
232 | ret = vmbus_sendpacket(input_device->device->channel, | |
233 | &ack, | |
234 | sizeof(struct pipe_prt_msg) - sizeof(unsigned char) + | |
235 | sizeof(struct synthhid_device_info_ack), | |
236 | (unsigned long)&ack, | |
237 | VM_PKT_DATA_INBAND, | |
238 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
239 | ||
240 | if (!ret) | |
241 | input_device->dev_info_status = 0; | |
242 | ||
243 | cleanup: | |
244 | complete(&input_device->wait_event); | |
245 | ||
246 | return; | |
247 | } | |
248 | ||
249 | static void mousevsc_on_receive(struct hv_device *device, | |
250 | struct vmpacket_descriptor *packet) | |
251 | { | |
252 | struct pipe_prt_msg *pipe_msg; | |
253 | struct synthhid_msg *hid_msg; | |
254 | struct mousevsc_dev *input_dev = hv_get_drvdata(device); | |
255 | struct synthhid_input_report *input_report; | |
3ccfd0a8 | 256 | size_t len; |
b95f5bcb S |
257 | |
258 | pipe_msg = (struct pipe_prt_msg *)((unsigned long)packet + | |
259 | (packet->offset8 << 3)); | |
260 | ||
261 | if (pipe_msg->type != PIPE_MESSAGE_DATA) | |
262 | return; | |
263 | ||
264 | hid_msg = (struct synthhid_msg *)pipe_msg->data; | |
265 | ||
266 | switch (hid_msg->header.type) { | |
267 | case SYNTH_HID_PROTOCOL_RESPONSE: | |
268 | /* | |
269 | * While it will be impossible for us to protect against | |
270 | * malicious/buggy hypervisor/host, add a check here to | |
271 | * ensure we don't corrupt memory. | |
272 | */ | |
273 | if ((pipe_msg->size + sizeof(struct pipe_prt_msg) | |
274 | - sizeof(unsigned char)) | |
275 | > sizeof(struct mousevsc_prt_msg)) { | |
276 | WARN_ON(1); | |
277 | break; | |
278 | } | |
279 | ||
280 | memcpy(&input_dev->protocol_resp, pipe_msg, | |
281 | pipe_msg->size + sizeof(struct pipe_prt_msg) - | |
282 | sizeof(unsigned char)); | |
283 | complete(&input_dev->wait_event); | |
284 | break; | |
285 | ||
286 | case SYNTH_HID_INITIAL_DEVICE_INFO: | |
287 | WARN_ON(pipe_msg->size < sizeof(struct hv_input_dev_info)); | |
288 | ||
289 | /* | |
290 | * Parse out the device info into device attr, | |
291 | * hid desc and report desc | |
292 | */ | |
293 | mousevsc_on_receive_device_info(input_dev, | |
294 | (struct synthhid_device_info *)pipe_msg->data); | |
295 | break; | |
296 | case SYNTH_HID_INPUT_REPORT: | |
297 | input_report = | |
298 | (struct synthhid_input_report *)pipe_msg->data; | |
299 | if (!input_dev->init_complete) | |
300 | break; | |
3ccfd0a8 DH |
301 | |
302 | len = min(input_report->header.size, | |
303 | (u32)sizeof(input_dev->input_buf)); | |
304 | memcpy(input_dev->input_buf, input_report->buffer, len); | |
305 | hid_input_report(input_dev->hid_device, HID_INPUT_REPORT, | |
306 | input_dev->input_buf, len, 1); | |
f1210455 | 307 | |
10f91c73 | 308 | pm_wakeup_hard_event(&input_dev->device->device); |
f1210455 | 309 | |
b95f5bcb S |
310 | break; |
311 | default: | |
af423779 | 312 | pr_err("unsupported hid msg type - type %d len %d\n", |
b95f5bcb S |
313 | hid_msg->header.type, hid_msg->header.size); |
314 | break; | |
315 | } | |
316 | ||
317 | } | |
318 | ||
319 | static void mousevsc_on_channel_callback(void *context) | |
320 | { | |
b95f5bcb | 321 | struct hv_device *device = context; |
b95f5bcb | 322 | struct vmpacket_descriptor *desc; |
b95f5bcb | 323 | |
6a297c90 DC |
324 | foreach_vmbus_pkt(desc, device->channel) { |
325 | switch (desc->type) { | |
326 | case VM_PKT_COMP: | |
b95f5bcb S |
327 | break; |
328 | ||
6a297c90 DC |
329 | case VM_PKT_DATA_INBAND: |
330 | mousevsc_on_receive(device, desc); | |
331 | break; | |
b95f5bcb | 332 | |
6a297c90 DC |
333 | default: |
334 | pr_err("Unhandled packet type %d, tid %llx len %d\n", | |
335 | desc->type, desc->trans_id, desc->len8 * 8); | |
b95f5bcb S |
336 | break; |
337 | } | |
6a297c90 | 338 | } |
b95f5bcb S |
339 | } |
340 | ||
341 | static int mousevsc_connect_to_vsp(struct hv_device *device) | |
342 | { | |
343 | int ret = 0; | |
3458e4c0 | 344 | unsigned long t; |
b95f5bcb S |
345 | struct mousevsc_dev *input_dev = hv_get_drvdata(device); |
346 | struct mousevsc_prt_msg *request; | |
347 | struct mousevsc_prt_msg *response; | |
348 | ||
af13f9ed DC |
349 | reinit_completion(&input_dev->wait_event); |
350 | ||
b95f5bcb S |
351 | request = &input_dev->protocol_req; |
352 | memset(request, 0, sizeof(struct mousevsc_prt_msg)); | |
353 | ||
354 | request->type = PIPE_MESSAGE_DATA; | |
355 | request->size = sizeof(struct synthhid_protocol_request); | |
356 | request->request.header.type = SYNTH_HID_PROTOCOL_REQUEST; | |
357 | request->request.header.size = sizeof(unsigned int); | |
358 | request->request.version_requested.version = SYNTHHID_INPUT_VERSION; | |
359 | ||
360 | ret = vmbus_sendpacket(device->channel, request, | |
361 | sizeof(struct pipe_prt_msg) - | |
362 | sizeof(unsigned char) + | |
363 | sizeof(struct synthhid_protocol_request), | |
364 | (unsigned long)request, | |
365 | VM_PKT_DATA_INBAND, | |
366 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
367 | if (ret) | |
368 | goto cleanup; | |
369 | ||
370 | t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ); | |
371 | if (!t) { | |
372 | ret = -ETIMEDOUT; | |
373 | goto cleanup; | |
374 | } | |
375 | ||
376 | response = &input_dev->protocol_resp; | |
377 | ||
378 | if (!response->response.approved) { | |
379 | pr_err("synthhid protocol request failed (version %d)\n", | |
380 | SYNTHHID_INPUT_VERSION); | |
381 | ret = -ENODEV; | |
382 | goto cleanup; | |
383 | } | |
384 | ||
385 | t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ); | |
386 | if (!t) { | |
387 | ret = -ETIMEDOUT; | |
388 | goto cleanup; | |
389 | } | |
390 | ||
391 | /* | |
392 | * We should have gotten the device attr, hid desc and report | |
393 | * desc at this point | |
394 | */ | |
395 | ret = input_dev->dev_info_status; | |
396 | ||
397 | cleanup: | |
398 | return ret; | |
399 | } | |
400 | ||
07d9ab4f HR |
401 | static int mousevsc_hid_parse(struct hid_device *hid) |
402 | { | |
403 | struct hv_device *dev = hid_get_drvdata(hid); | |
404 | struct mousevsc_dev *input_dev = hv_get_drvdata(dev); | |
405 | ||
406 | return hid_parse_report(hid, input_dev->report_desc, | |
407 | input_dev->report_desc_size); | |
408 | } | |
409 | ||
b95f5bcb S |
410 | static int mousevsc_hid_open(struct hid_device *hid) |
411 | { | |
412 | return 0; | |
413 | } | |
414 | ||
415 | static int mousevsc_hid_start(struct hid_device *hid) | |
416 | { | |
417 | return 0; | |
418 | } | |
419 | ||
420 | static void mousevsc_hid_close(struct hid_device *hid) | |
421 | { | |
422 | } | |
423 | ||
424 | static void mousevsc_hid_stop(struct hid_device *hid) | |
425 | { | |
426 | } | |
427 | ||
269ddfc6 S |
428 | static int mousevsc_hid_raw_request(struct hid_device *hid, |
429 | unsigned char report_num, | |
c3d77fab | 430 | __u8 *buf, size_t len, |
269ddfc6 S |
431 | unsigned char rtype, |
432 | int reqtype) | |
433 | { | |
434 | return 0; | |
435 | } | |
436 | ||
b95f5bcb | 437 | static struct hid_ll_driver mousevsc_ll_driver = { |
07d9ab4f | 438 | .parse = mousevsc_hid_parse, |
b95f5bcb S |
439 | .open = mousevsc_hid_open, |
440 | .close = mousevsc_hid_close, | |
441 | .start = mousevsc_hid_start, | |
442 | .stop = mousevsc_hid_stop, | |
269ddfc6 | 443 | .raw_request = mousevsc_hid_raw_request, |
b95f5bcb S |
444 | }; |
445 | ||
446 | static struct hid_driver mousevsc_hid_driver; | |
447 | ||
448 | static int mousevsc_probe(struct hv_device *device, | |
449 | const struct hv_vmbus_device_id *dev_id) | |
450 | { | |
451 | int ret; | |
452 | struct mousevsc_dev *input_dev; | |
453 | struct hid_device *hid_dev; | |
454 | ||
455 | input_dev = mousevsc_alloc_device(device); | |
456 | ||
457 | if (!input_dev) | |
458 | return -ENOMEM; | |
459 | ||
460 | ret = vmbus_open(device->channel, | |
461 | INPUTVSC_SEND_RING_BUFFER_SIZE, | |
462 | INPUTVSC_RECV_RING_BUFFER_SIZE, | |
463 | NULL, | |
464 | 0, | |
465 | mousevsc_on_channel_callback, | |
466 | device | |
467 | ); | |
468 | ||
469 | if (ret) | |
470 | goto probe_err0; | |
471 | ||
472 | ret = mousevsc_connect_to_vsp(device); | |
473 | ||
474 | if (ret) | |
475 | goto probe_err1; | |
476 | ||
477 | /* workaround SA-167 */ | |
478 | if (input_dev->report_desc[14] == 0x25) | |
479 | input_dev->report_desc[14] = 0x29; | |
480 | ||
481 | hid_dev = hid_allocate_device(); | |
482 | if (IS_ERR(hid_dev)) { | |
483 | ret = PTR_ERR(hid_dev); | |
484 | goto probe_err1; | |
485 | } | |
486 | ||
487 | hid_dev->ll_driver = &mousevsc_ll_driver; | |
488 | hid_dev->driver = &mousevsc_hid_driver; | |
489 | hid_dev->bus = BUS_VIRTUAL; | |
490 | hid_dev->vendor = input_dev->hid_dev_info.vendor; | |
491 | hid_dev->product = input_dev->hid_dev_info.product; | |
492 | hid_dev->version = input_dev->hid_dev_info.version; | |
493 | input_dev->hid_device = hid_dev; | |
494 | ||
495 | sprintf(hid_dev->name, "%s", "Microsoft Vmbus HID-compliant Mouse"); | |
496 | ||
b565a390 S |
497 | hid_set_drvdata(hid_dev, device); |
498 | ||
74c4fb05 S |
499 | ret = hid_add_device(hid_dev); |
500 | if (ret) | |
501 | goto probe_err1; | |
502 | ||
b95f5bcb | 503 | |
07d9ab4f | 504 | ret = hid_parse(hid_dev); |
b95f5bcb S |
505 | if (ret) { |
506 | hid_err(hid_dev, "parse failed\n"); | |
507 | goto probe_err2; | |
508 | } | |
509 | ||
510 | ret = hid_hw_start(hid_dev, HID_CONNECT_HIDINPUT | HID_CONNECT_HIDDEV); | |
511 | ||
512 | if (ret) { | |
513 | hid_err(hid_dev, "hw start failed\n"); | |
514 | goto probe_err2; | |
515 | } | |
516 | ||
f1210455 DC |
517 | device_init_wakeup(&device->device, true); |
518 | ||
b95f5bcb S |
519 | input_dev->connected = true; |
520 | input_dev->init_complete = true; | |
521 | ||
522 | return ret; | |
523 | ||
524 | probe_err2: | |
525 | hid_destroy_device(hid_dev); | |
526 | ||
527 | probe_err1: | |
528 | vmbus_close(device->channel); | |
529 | ||
530 | probe_err0: | |
531 | mousevsc_free_device(input_dev); | |
532 | ||
533 | return ret; | |
534 | } | |
535 | ||
536 | ||
537 | static int mousevsc_remove(struct hv_device *dev) | |
538 | { | |
539 | struct mousevsc_dev *input_dev = hv_get_drvdata(dev); | |
540 | ||
f1210455 | 541 | device_init_wakeup(&dev->device, false); |
b95f5bcb | 542 | vmbus_close(dev->channel); |
c1c454b8 | 543 | hid_hw_stop(input_dev->hid_device); |
b95f5bcb S |
544 | hid_destroy_device(input_dev->hid_device); |
545 | mousevsc_free_device(input_dev); | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
af13f9ed DC |
550 | static int mousevsc_suspend(struct hv_device *dev) |
551 | { | |
552 | vmbus_close(dev->channel); | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
557 | static int mousevsc_resume(struct hv_device *dev) | |
558 | { | |
559 | int ret; | |
560 | ||
561 | ret = vmbus_open(dev->channel, | |
562 | INPUTVSC_SEND_RING_BUFFER_SIZE, | |
563 | INPUTVSC_RECV_RING_BUFFER_SIZE, | |
564 | NULL, 0, | |
565 | mousevsc_on_channel_callback, | |
566 | dev); | |
567 | if (ret) | |
568 | return ret; | |
569 | ||
570 | ret = mousevsc_connect_to_vsp(dev); | |
571 | return ret; | |
572 | } | |
573 | ||
b95f5bcb S |
574 | static const struct hv_vmbus_device_id id_table[] = { |
575 | /* Mouse guid */ | |
048c5add | 576 | { HV_MOUSE_GUID, }, |
b95f5bcb S |
577 | { }, |
578 | }; | |
579 | ||
580 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
581 | ||
582 | static struct hv_driver mousevsc_drv = { | |
583 | .name = KBUILD_MODNAME, | |
584 | .id_table = id_table, | |
585 | .probe = mousevsc_probe, | |
586 | .remove = mousevsc_remove, | |
af13f9ed DC |
587 | .suspend = mousevsc_suspend, |
588 | .resume = mousevsc_resume, | |
af0a5646 AV |
589 | .driver = { |
590 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, | |
591 | }, | |
b95f5bcb S |
592 | }; |
593 | ||
594 | static int __init mousevsc_init(void) | |
595 | { | |
596 | return vmbus_driver_register(&mousevsc_drv); | |
597 | } | |
598 | ||
599 | static void __exit mousevsc_exit(void) | |
600 | { | |
601 | vmbus_driver_unregister(&mousevsc_drv); | |
602 | } | |
603 | ||
604 | MODULE_LICENSE("GPL"); | |
64caea53 JS |
605 | MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic HID Driver"); |
606 | ||
b95f5bcb S |
607 | module_init(mousevsc_init); |
608 | module_exit(mousevsc_exit); |