DrvKeyboardQueue.cpp@ 91687

Last change on this file since 91687 was 90241, checked in by vboxsync, 3 years ago
DrvKeyboardQueue: Fixed Korean key detection (I think), added assertion for keys that have no translation and produce zero usage code.
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File size: 20.3 KB

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1	/* $Id: DrvKeyboardQueue.cpp 90241 2021-07-19 14:28:35Z vboxsync $ */
2	/** @file
3	* VBox input devices: Keyboard queue driver
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DRV_KBD_QUEUE
23	#include <VBox/vmm/pdmdrv.h>
24	#include <iprt/assert.h>
25	#include <iprt/uuid.h>
26
27	#include "VBoxDD.h"
28
29
30	/*********************************************************************************************************************************
31	* Defined Constants And Macros *
32	*********************************************************************************************************************************/
33
34	/** Keyboard usage page bits to be OR-ed into the code. */
35	#define HID_PG_KB_BITS RT_MAKE_U32(0, USB_HID_KB_PAGE)
36
37
38	/*********************************************************************************************************************************
39	* Structures and Typedefs *
40	*********************************************************************************************************************************/
41
42	/** Scancode translator state. */
43	typedef enum {
44	SS_IDLE, /*< Starting state. /
45	SS_EXT, /*< E0 byte was received. /
46	SS_EXT1 /*< E1 byte was received. /
47	} scan_state_t;
48
49	/**
50	* Keyboard queue driver instance data.
51	*
52	* @implements PDMIKEYBOARDCONNECTOR
53	* @implements PDMIKEYBOARDPORT
54	*/
55	typedef struct DRVKBDQUEUE
56	{
57	/** Pointer to the driver instance structure. */
58	PPDMDRVINS pDrvIns;
59	/** Pointer to the keyboard port interface of the driver/device above us. */
60	PPDMIKEYBOARDPORT pUpPort;
61	/** Pointer to the keyboard port interface of the driver/device below us. */
62	PPDMIKEYBOARDCONNECTOR pDownConnector;
63	/** Our keyboard connector interface. */
64	PDMIKEYBOARDCONNECTOR IConnector;
65	/** Our keyboard port interface. */
66	PDMIKEYBOARDPORT IPort;
67	/** The queue handle. */
68	PPDMQUEUE pQueue;
69	/** State of the scancode translation. */
70	scan_state_t XlatState;
71	/** Discard input when this flag is set. */
72	bool fInactive;
73	/** When VM is suspended, queue full errors are not fatal. */
74	bool fSuspended;
75	} DRVKBDQUEUE, *PDRVKBDQUEUE;
76
77
78	/**
79	* Keyboard queue item.
80	*/
81	typedef struct DRVKBDQUEUEITEM
82	{
83	/** The core part owned by the queue manager. */
84	PDMQUEUEITEMCORE Core;
85	/** The keycode. */
86	uint32_t idUsage;
87	} DRVKBDQUEUEITEM, *PDRVKBDQUEUEITEM;
88
89
90	/*********************************************************************************************************************************
91	* Global Variables *
92	*********************************************************************************************************************************/
93
94	/** Lookup table for converting PC/XT scan codes to USB HID usage codes. */
95	static const uint8_t aScancode2Hid[] =
96	{
97	0x00, 0x29, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, /* 00-07 */
98	0x24, 0x25, 0x26, 0x27, 0x2d, 0x2e, 0x2a, 0x2b, /* 08-1F */
99	0x14, 0x1a, 0x08, 0x15, 0x17, 0x1c, 0x18, 0x0c, /* 10-17 */
100	0x12, 0x13, 0x2f, 0x30, 0x28, 0xe0, 0x04, 0x16, /* 18-1F */
101	0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x0f, 0x33, /* 20-27 */
102	0x34, 0x35, 0xe1, 0x31, 0x1d, 0x1b, 0x06, 0x19, /* 28-2F */
103	0x05, 0x11, 0x10, 0x36, 0x37, 0x38, 0xe5, 0x55, /* 30-37 */
104	0xe2, 0x2c, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, /* 38-3F */
105	0x3f, 0x40, 0x41, 0x42, 0x43, 0x53, 0x47, 0x5f, /* 40-47 */
106	0x60, 0x61, 0x56, 0x5c, 0x5d, 0x5e, 0x57, 0x59, /* 48-4F */
107	0x5a, 0x5b, 0x62, 0x63, 0x46, 0x00, 0x64, 0x44, /* 50-57 */
108	0x45, 0x67, 0x00, 0x00, 0x8c, 0x00, 0x00, 0x00, /* 58-5F */
109	0x00, 0x00, 0x00, 0x00, 0x68, 0x69, 0x6a, 0x6b, /* 60-67 */
110	0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x00, /* 68-6F */
111	0x88, 0x91, 0x90, 0x87, 0x00, 0x00, 0x00, 0x00, /* 70-77 */
112	0x00, 0x8a, 0x00, 0x8b, 0x00, 0x89, 0x85, 0x00 /* 78-7F */
113	};
114
115	/** Lookup table for extended scancodes (arrow keys etc.). */
116	static const uint8_t aExtScan2Hid[] =
117	{
118	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00-07 */
119	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 08-1F */
120	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10-17 */
121	0x00, 0x00, 0x00, 0x00, 0x58, 0xe4, 0x00, 0x00, /* 18-1F */
122	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 20-27 */
123	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 28-2F */
124	0x00, 0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x46, /* 30-37 */
125	/* Sun-specific keys. Most of the XT codes are made up */
126	0xe6, 0x00, 0x00, 0x75, 0x76, 0x77, 0xA3, 0x78, /* 38-3F */
127	0x80, 0x81, 0x82, 0x79, 0x00, 0x00, 0x48, 0x4a, /* 40-47 */
128	0x52, 0x4b, 0x00, 0x50, 0x00, 0x4f, 0x00, 0x4d, /* 48-4F */
129	0x51, 0x4e, 0x49, 0x4c, 0x00, 0x00, 0x00, 0x00, /* 50-57 */
130	0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65, 0x66, 0x00, /* 58-5F */
131	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60-67 */
132	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 68-6F */
133	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70-77 */
134	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 /* 78-7F */
135	};
136
137	/**
138	* Convert a PC scan code to a USB HID usage byte.
139	*
140	* @param state Current state of the translator (scan_state_t).
141	* @param scanCode Incoming scan code.
142	* @param pUsage Pointer to usage; high bit set for key up events. The
143	* contents are only valid if returned state is SS_IDLE.
144	*
145	* @return scan_state_t New state of the translator.
146	*/
147	static scan_state_t ScancodeToHidUsage(scan_state_t state, uint8_t scanCode, uint32_t *pUsage)
148	{
149	uint32_t keyUp;
150	uint8_t usage;
151
152	Assert(pUsage);
153
154	/* Isolate the scan code and key break flag. */
155	keyUp = (scanCode & 0x80) ? PDMIKBDPORT_KEY_UP : 0;
156
157	switch (state) {
158	case SS_IDLE:
159	if (scanCode == 0xE0) {
160	state = SS_EXT;
161	} else if (scanCode == 0xE1) {
162	state = SS_EXT1;
163	} else {
164	usage = aScancode2Hid[scanCode & 0x7F];
165	AssertMsg(usage, ("SS_IDLE: scanCode=%02X\n", scanCode));
166	*pUsage = usage \| keyUp \| HID_PG_KB_BITS;
167	/* Remain in SS_IDLE state. */
168	}
169	break;
170	case SS_EXT:
171	usage = aExtScan2Hid[scanCode & 0x7F];
172	AssertMsg(usage, ("SS_EXT: scanCode=%02X\n", scanCode));
173	*pUsage = usage \| keyUp \| HID_PG_KB_BITS;
174	state = SS_IDLE;
175	break;
176	case SS_EXT1:
177	/* The sequence is E1 1D 45 E1 9D C5. We take the easy way out and remain
178	* in the SS_EXT1 state until 45 or C5 is received.
179	*/
180	if ((scanCode & 0x7F) == 0x45) {
181	*pUsage = 0x48 \| HID_PG_KB_BITS;
182	if (scanCode == 0xC5)
183	*pUsage \|= keyUp;
184	state = SS_IDLE;
185	}
186	/* Else remain in SS_EXT1 state. */
187	break;
188	}
189	return state;
190	}
191
192
193	/* -=-=-=-=- IBase -=-=-=-=- */
194
195	/**
196	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
197	*/
198	static DECLCALLBACK(void ) drvKbdQueueQueryInterface(PPDMIBASE pInterface, const char pszIID)
199	{
200	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
201	PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE);
202
203	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
204	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIKEYBOARDCONNECTOR, &pThis->IConnector);
205	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIKEYBOARDPORT, &pThis->IPort);
206	return NULL;
207	}
208
209
210	/* -=-=-=-=- IKeyboardPort -=-=-=-=- */
211
212	/** Converts a pointer to DRVKBDQUEUE::IPort to a DRVKBDQUEUE pointer. */
213	#define IKEYBOARDPORT_2_DRVKBDQUEUE(pInterface) ( (PDRVKBDQUEUE)((char *)(pInterface) - RT_UOFFSETOF(DRVKBDQUEUE, IPort)) )
214
215
216	/**
217	* @interface_method_impl{PDMIKEYBOARDPORT,pfnPutEventScan}
218	*
219	* Because of the event queueing the EMT context requirement is lifted.
220	* @thread Any thread.
221	*/
222	static DECLCALLBACK(int) drvKbdQueuePutEventScan(PPDMIKEYBOARDPORT pInterface, uint8_t u8ScanCode)
223	{
224	PDRVKBDQUEUE pDrv = IKEYBOARDPORT_2_DRVKBDQUEUE(pInterface);
225	/* Ignore any attempt to send events if queue is inactive. */
226	if (pDrv->fInactive)
227	return VINF_SUCCESS;
228
229	uint32_t idUsage = 0;
230	pDrv->XlatState = ScancodeToHidUsage(pDrv->XlatState, u8ScanCode, &idUsage);
231
232	if (pDrv->XlatState == SS_IDLE)
233	{
234	PDRVKBDQUEUEITEM pItem = (PDRVKBDQUEUEITEM)PDMQueueAlloc(pDrv->pQueue);
235	if (pItem)
236	{
237	/*
238	* Work around incredibly poorly desgined Korean keyboards which
239	* only send break events for Hangul/Hanja keys -- convert a lone
240	* key up into a key up/key down sequence.
241	*/
242	if ( (idUsage == (PDMIKBDPORT_KEY_UP \| HID_PG_KB_BITS \| 0x90))
243	\|\| (idUsage == (PDMIKBDPORT_KEY_UP \| HID_PG_KB_BITS \| 0x91)))
244	{
245	PDRVKBDQUEUEITEM pItem2 = (PDRVKBDQUEUEITEM)PDMQueueAlloc(pDrv->pQueue);
246	/*
247	* NB: If there's no room in the queue, we will drop the faked
248	* key down event. Probably less bad than the alternatives.
249	*/
250	if (pItem2)
251	{
252	/* Manufacture a key down event. */
253	pItem2->idUsage = idUsage & ~PDMIKBDPORT_KEY_UP;
254	PDMQueueInsert(pDrv->pQueue, &pItem2->Core);
255	}
256	}
257
258	pItem->idUsage = idUsage;
259	PDMQueueInsert(pDrv->pQueue, &pItem->Core);
260
261	return VINF_SUCCESS;
262	}
263	if (!pDrv->fSuspended)
264	AssertMsgFailed(("drvKbdQueuePutEventScan: Queue is full!!!!\n"));
265	return VERR_PDM_NO_QUEUE_ITEMS;
266	}
267	else
268	return VINF_SUCCESS;
269	}
270
271
272	/**
273	* @interface_method_impl{PDMIKEYBOARDPORT,pfnPutEventHid}
274	*
275	* Because of the event queueing the EMT context requirement is lifted.
276	* @thread Any thread.
277	*/
278	static DECLCALLBACK(int) drvKbdQueuePutEventHid(PPDMIKEYBOARDPORT pInterface, uint32_t idUsage)
279	{
280	PDRVKBDQUEUE pDrv = IKEYBOARDPORT_2_DRVKBDQUEUE(pInterface);
281	/* Ignore any attempt to send events if queue is inactive. */
282	if (pDrv->fInactive)
283	return VINF_SUCCESS;
284
285	PDRVKBDQUEUEITEM pItem = (PDRVKBDQUEUEITEM)PDMQueueAlloc(pDrv->pQueue);
286	if (pItem)
287	{
288	pItem->idUsage = idUsage;
289	PDMQueueInsert(pDrv->pQueue, &pItem->Core);
290
291	return VINF_SUCCESS;
292	}
293	if (!pDrv->fSuspended)
294	AssertMsgFailed(("drvKbdQueuePutEventHid: Queue is full!!!!\n"));
295	return VERR_PDM_NO_QUEUE_ITEMS;
296	}
297
298
299	/**
300	* @interface_method_impl{PDMIKEYBOARDPORT,pfnReleaseKeys}
301	*
302	* Because of the event queueing the EMT context requirement is lifted.
303	* @thread Any thread.
304	*/
305	static DECLCALLBACK(int) drvKbdQueueReleaseKeys(PPDMIKEYBOARDPORT pInterface)
306	{
307	PDRVKBDQUEUE pDrv = IKEYBOARDPORT_2_DRVKBDQUEUE(pInterface);
308
309	/* Ignore any attempt to send events if queue is inactive. */
310	if (pDrv->fInactive)
311	return VINF_SUCCESS;
312
313	PDRVKBDQUEUEITEM pItem = (PDRVKBDQUEUEITEM)PDMQueueAlloc(pDrv->pQueue);
314	if (pItem)
315	{
316	/* Send a special key event that forces all keys to be released.
317	* Goes through the queue so that it would take effect only after
318	* any key events that might already be queued up.
319	*/
320	pItem->idUsage = PDMIKBDPORT_RELEASE_KEYS \| HID_PG_KB_BITS;
321	PDMQueueInsert(pDrv->pQueue, &pItem->Core);
322
323	return VINF_SUCCESS;
324	}
325	if (!pDrv->fSuspended)
326	AssertMsgFailed(("drvKbdQueueReleaseKeys: Queue is full!!!!\n"));
327	return VERR_PDM_NO_QUEUE_ITEMS;
328	}
329
330
331	/* -=-=-=-=- IConnector -=-=-=-=- */
332
333	#define PPDMIKEYBOARDCONNECTOR_2_DRVKBDQUEUE(pInterface) ( (PDRVKBDQUEUE)((char *)(pInterface) - RT_UOFFSETOF(DRVKBDQUEUE, IConnector)) )
334
335
336	/**
337	* Pass LED status changes from the guest thru to the frontend driver.
338	*
339	* @param pInterface Pointer to the keyboard connector interface structure.
340	* @param enmLeds The new LED mask.
341	*/
342	static DECLCALLBACK(void) drvKbdPassThruLedsChange(PPDMIKEYBOARDCONNECTOR pInterface, PDMKEYBLEDS enmLeds)
343	{
344	PDRVKBDQUEUE pDrv = PPDMIKEYBOARDCONNECTOR_2_DRVKBDQUEUE(pInterface);
345	pDrv->pDownConnector->pfnLedStatusChange(pDrv->pDownConnector, enmLeds);
346	}
347
348	/**
349	* Pass keyboard state changes from the guest thru to the frontend driver.
350	*
351	* @param pInterface Pointer to the keyboard connector interface structure.
352	* @param fActive The new active/inactive state.
353	*/
354	static DECLCALLBACK(void) drvKbdPassThruSetActive(PPDMIKEYBOARDCONNECTOR pInterface, bool fActive)
355	{
356	PDRVKBDQUEUE pDrv = PPDMIKEYBOARDCONNECTOR_2_DRVKBDQUEUE(pInterface);
357
358	AssertPtr(pDrv->pDownConnector->pfnSetActive);
359	pDrv->pDownConnector->pfnSetActive(pDrv->pDownConnector, fActive);
360	}
361
362	/**
363	* Flush the keyboard queue if there are pending events.
364	*
365	* @param pInterface Pointer to the keyboard connector interface structure.
366	*/
367	static DECLCALLBACK(void) drvKbdFlushQueue(PPDMIKEYBOARDCONNECTOR pInterface)
368	{
369	PDRVKBDQUEUE pDrv = PPDMIKEYBOARDCONNECTOR_2_DRVKBDQUEUE(pInterface);
370
371	AssertPtr(pDrv->pQueue);
372	PDMQueueFlushIfNecessary(pDrv->pQueue);
373	}
374
375
376	/* -=-=-=-=- queue -=-=-=-=- */
377
378	/**
379	* Queue callback for processing a queued item.
380	*
381	* @returns Success indicator.
382	* If false the item will not be removed and the flushing will stop.
383	* @param pDrvIns The driver instance.
384	* @param pItemCore Pointer to the queue item to process.
385	*/
386	static DECLCALLBACK(bool) drvKbdQueueConsumer(PPDMDRVINS pDrvIns, PPDMQUEUEITEMCORE pItemCore)
387	{
388	PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE);
389	PDRVKBDQUEUEITEM pItem = (PDRVKBDQUEUEITEM)pItemCore;
390	int rc = pThis->pUpPort->pfnPutEventHid(pThis->pUpPort, pItem->idUsage);
391	return rc != VERR_TRY_AGAIN;
392	}
393
394
395	/* -=-=-=-=- driver interface -=-=-=-=- */
396
397	/**
398	* Power On notification.
399	*
400	* @returns VBox status code.
401	* @param pDrvIns The drive instance data.
402	*/
403	static DECLCALLBACK(void) drvKbdQueuePowerOn(PPDMDRVINS pDrvIns)
404	{
405	PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE);
406	pThis->fInactive = false;
407	}
408
409
410	/**
411	* Reset notification.
412	*
413	* @returns VBox status code.
414	* @param pDrvIns The drive instance data.
415	*/
416	static DECLCALLBACK(void) drvKbdQueueReset(PPDMDRVINS pDrvIns)
417	{
418	//PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE);
419	/** @todo purge the queue on reset. */
420	RT_NOREF(pDrvIns);
421	}
422
423
424	/**
425	* Suspend notification.
426	*
427	* @returns VBox status code.
428	* @param pDrvIns The drive instance data.
429	*/
430	static DECLCALLBACK(void) drvKbdQueueSuspend(PPDMDRVINS pDrvIns)
431	{
432	PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE);
433	pThis->fSuspended = true;
434	}
435
436
437	/**
438	* Resume notification.
439	*
440	* @returns VBox status code.
441	* @param pDrvIns The drive instance data.
442	*/
443	static DECLCALLBACK(void) drvKbdQueueResume(PPDMDRVINS pDrvIns)
444	{
445	PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE);
446	pThis->fInactive = false;
447	pThis->fSuspended = false;
448	}
449
450
451	/**
452	* Power Off notification.
453	*
454	* @param pDrvIns The drive instance data.
455	*/
456	static DECLCALLBACK(void) drvKbdQueuePowerOff(PPDMDRVINS pDrvIns)
457	{
458	PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE);
459	pThis->fInactive = true;
460	}
461
462
463	/**
464	* Construct a keyboard driver instance.
465	*
466	* @copydoc FNPDMDRVCONSTRUCT
467	*/
468	static DECLCALLBACK(int) drvKbdQueueConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
469	{
470	PDRVKBDQUEUE pDrv = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE);
471	LogFlow(("drvKbdQueueConstruct: iInstance=%d\n", pDrvIns->iInstance));
472	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
473
474	/*
475	* Validate configuration.
476	*/
477	if (!CFGMR3AreValuesValid(pCfg, "QueueSize\0Interval\0"))
478	return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES;
479
480	/*
481	* Init basic data members and interfaces.
482	*/
483	pDrv->fInactive = true;
484	pDrv->fSuspended = false;
485	pDrv->XlatState = SS_IDLE;
486	/* IBase. */
487	pDrvIns->IBase.pfnQueryInterface = drvKbdQueueQueryInterface;
488	/* IKeyboardConnector. */
489	pDrv->IConnector.pfnLedStatusChange = drvKbdPassThruLedsChange;
490	pDrv->IConnector.pfnSetActive = drvKbdPassThruSetActive;
491	pDrv->IConnector.pfnFlushQueue = drvKbdFlushQueue;
492	/* IKeyboardPort. */
493	pDrv->IPort.pfnPutEventScan = drvKbdQueuePutEventScan;
494	pDrv->IPort.pfnPutEventHid = drvKbdQueuePutEventHid;
495	pDrv->IPort.pfnReleaseKeys = drvKbdQueueReleaseKeys;
496
497	/*
498	* Get the IKeyboardPort interface of the above driver/device.
499	*/
500	pDrv->pUpPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIKEYBOARDPORT);
501	if (!pDrv->pUpPort)
502	{
503	AssertMsgFailed(("Configuration error: No keyboard port interface above!\n"));
504	return VERR_PDM_MISSING_INTERFACE_ABOVE;
505	}
506
507	/*
508	* Attach driver below and query it's connector interface.
509	*/
510	PPDMIBASE pDownBase;
511	int rc = PDMDrvHlpAttach(pDrvIns, fFlags, &pDownBase);
512	if (RT_FAILURE(rc))
513	{
514	AssertMsgFailed(("Failed to attach driver below us! rc=%Rra\n", rc));
515	return rc;
516	}
517	pDrv->pDownConnector = PDMIBASE_QUERY_INTERFACE(pDownBase, PDMIKEYBOARDCONNECTOR);
518	if (!pDrv->pDownConnector)
519	{
520	AssertMsgFailed(("Configuration error: No keyboard connector interface below!\n"));
521	return VERR_PDM_MISSING_INTERFACE_BELOW;
522	}
523
524	/*
525	* Create the queue.
526	*/
527	uint32_t cMilliesInterval = 0;
528	rc = CFGMR3QueryU32(pCfg, "Interval", &cMilliesInterval);
529	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
530	cMilliesInterval = 0;
531	else if (RT_FAILURE(rc))
532	{
533	AssertMsgFailed(("Configuration error: 32-bit \"Interval\" -> rc=%Rrc\n", rc));
534	return rc;
535	}
536
537	uint32_t cItems = 0;
538	rc = CFGMR3QueryU32(pCfg, "QueueSize", &cItems);
539	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
540	cItems = 128;
541	else if (RT_FAILURE(rc))
542	{
543	AssertMsgFailed(("Configuration error: 32-bit \"QueueSize\" -> rc=%Rrc\n", rc));
544	return rc;
545	}
546
547	rc = PDMDrvHlpQueueCreate(pDrvIns, sizeof(DRVKBDQUEUEITEM), cItems, cMilliesInterval,
548	drvKbdQueueConsumer, "Keyboard", &pDrv->pQueue);
549	if (RT_FAILURE(rc))
550	{
551	AssertMsgFailed(("Failed to create driver: cItems=%d cMilliesInterval=%d rc=%Rrc\n", cItems, cMilliesInterval, rc));
552	return rc;
553	}
554
555	return VINF_SUCCESS;
556	}
557
558
559	/**
560	* Keyboard queue driver registration record.
561	*/
562	const PDMDRVREG g_DrvKeyboardQueue =
563	{
564	/* u32Version */
565	PDM_DRVREG_VERSION,
566	/* szName */
567	"KeyboardQueue",
568	/* szRCMod */
569	"",
570	/* szR0Mod */
571	"",
572	/* pszDescription */
573	"Keyboard queue driver to plug in between the key source and the device to do queueing and inter-thread transport.",
574	/* fFlags */
575	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
576	/* fClass. */
577	PDM_DRVREG_CLASS_KEYBOARD,
578	/* cMaxInstances */
579	~0U,
580	/* cbInstance */
581	sizeof(DRVKBDQUEUE),
582	/* pfnConstruct */
583	drvKbdQueueConstruct,
584	/* pfnRelocate */
585	NULL,
586	/* pfnDestruct */
587	NULL,
588	/* pfnIOCtl */
589	NULL,
590	/* pfnPowerOn */
591	drvKbdQueuePowerOn,
592	/* pfnReset */
593	drvKbdQueueReset,
594	/* pfnSuspend */
595	drvKbdQueueSuspend,
596	/* pfnResume */
597	drvKbdQueueResume,
598	/* pfnAttach */
599	NULL,
600	/* pfnDetach */
601	NULL,
602	/* pfnPowerOff */
603	drvKbdQueuePowerOff,
604	/* pfnSoftReset */
605	NULL,
606	/* u32EndVersion */
607	PDM_DRVREG_VERSION
608	};
609

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source: vbox/trunk/src/VBox/Devices/Input/DrvKeyboardQueue.cpp@ 91687

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