HGSMIBase.cpp@ 55043

Last change on this file since 55043 was 55043, checked in by vboxsync, 10 years ago
Additions/x11: temporary check-in of new X11 Additions resizing code.
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1	/* $Id: HGSMIBase.cpp 55043 2015-03-31 15:59:35Z vboxsync $ */
2	/** @file
3	* VirtualBox Video driver, common code - HGSMI initialisation and helper
4	* functions.
5	*/
6
7	/*
8	* Copyright (C) 2006-2012 Oracle Corporation
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*/
18
19	#include <VBox/VBoxVideoGuest.h>
20	#include <VBox/VBoxVideo.h>
21	#include <VBox/VBoxGuest.h>
22	#include <VBox/Hardware/VBoxVideoVBE.h>
23	#include <VBox/VMMDev.h>
24
25	#include <iprt/asm.h>
26	#include <iprt/log.h>
27	#include <iprt/string.h>
28
29	/** Send completion notification to the host for the command located at offset
30	* @a offt into the host command buffer. */
31	static void HGSMINotifyHostCmdComplete(PHGSMIHOSTCOMMANDCONTEXT pCtx, HGSMIOFFSET offt)
32	{
33	VBoxVideoCmnPortWriteUlong(pCtx->port, offt);
34	}
35
36
37	/**
38	* Inform the host that a command has been handled.
39	*
40	* @param pCtx the context containing the heap to be used
41	* @param pvMem pointer into the heap as mapped in @a pCtx to the command to
42	* be completed
43	*/
44	RTDECL(void) VBoxHGSMIHostCmdComplete(PHGSMIHOSTCOMMANDCONTEXT pCtx,
45	void *pvMem)
46	{
47	HGSMIBUFFERHEADER *pHdr = HGSMIBufferHeaderFromData(pvMem);
48	HGSMIOFFSET offMem = HGSMIPointerToOffset(&pCtx->areaCtx, pHdr);
49	Assert(offMem != HGSMIOFFSET_VOID);
50	if(offMem != HGSMIOFFSET_VOID)
51	{
52	HGSMINotifyHostCmdComplete(pCtx, offMem);
53	}
54	}
55
56
57	/** Submit an incoming host command to the appropriate handler. */
58	static void hgsmiHostCmdProcess(PHGSMIHOSTCOMMANDCONTEXT pCtx,
59	HGSMIOFFSET offBuffer)
60	{
61	int rc = HGSMIBufferProcess(&pCtx->areaCtx, &pCtx->channels, offBuffer);
62	Assert(!RT_FAILURE(rc));
63	if(RT_FAILURE(rc))
64	{
65	/* failure means the command was not submitted to the handler for some reason
66	* it's our responsibility to notify its completion in this case */
67	HGSMINotifyHostCmdComplete(pCtx, offBuffer);
68	}
69	/* if the cmd succeeded it's responsibility of the callback to complete it */
70	}
71
72	/** Get the next command from the host. */
73	static HGSMIOFFSET hgsmiGetHostBuffer(PHGSMIHOSTCOMMANDCONTEXT pCtx)
74	{
75	return VBoxVideoCmnPortReadUlong(pCtx->port);
76	}
77
78
79	/** Get and handle the next command from the host. */
80	static void hgsmiHostCommandQueryProcess(PHGSMIHOSTCOMMANDCONTEXT pCtx)
81	{
82	HGSMIOFFSET offset = hgsmiGetHostBuffer(pCtx);
83	AssertReturnVoid(offset != HGSMIOFFSET_VOID);
84	hgsmiHostCmdProcess(pCtx, offset);
85	}
86
87
88	/** Drain the host command queue. */
89	RTDECL(void) VBoxHGSMIProcessHostQueue(PHGSMIHOSTCOMMANDCONTEXT pCtx)
90	{
91	while (pCtx->pfHostFlags->u32HostFlags & HGSMIHOSTFLAGS_COMMANDS_PENDING)
92	{
93	if (!ASMAtomicCmpXchgBool(&pCtx->fHostCmdProcessing, true, false))
94	return;
95	hgsmiHostCommandQueryProcess(pCtx);
96	ASMAtomicWriteBool(&pCtx->fHostCmdProcessing, false);
97	}
98	}
99
100
101	/** Detect whether HGSMI is supported by the host. */
102	RTDECL(bool) VBoxHGSMIIsSupported(void)
103	{
104	uint16_t DispiId;
105
106	VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_ID);
107	VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, VBE_DISPI_ID_HGSMI);
108
109	DispiId = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA);
110
111	return (DispiId == VBE_DISPI_ID_HGSMI);
112	}
113
114
115	/**
116	* Allocate and initialise a command descriptor in the guest heap for a
117	* guest-to-host command.
118	*
119	* @returns pointer to the descriptor's command data buffer
120	* @param pCtx the context containing the heap to be used
121	* @param cbData the size of the command data to go into the descriptor
122	* @param u8Ch the HGSMI channel to be used, set to the descriptor
123	* @param u16Op the HGSMI command to be sent, set to the descriptor
124	*/
125	RTDECL(void *) VBoxHGSMIBufferAlloc(PHGSMIGUESTCOMMANDCONTEXT pCtx,
126	HGSMISIZE cbData,
127	uint8_t u8Ch,
128	uint16_t u16Op)
129	{
130	#ifdef VBOX_WDDM_MINIPORT
131	return VBoxSHGSMIHeapAlloc (&pCtx->heapCtx, cbData, u8Ch, u16Op);
132	#else
133	return HGSMIHeapAlloc (&pCtx->heapCtx, cbData, u8Ch, u16Op);
134	#endif
135	}
136
137
138	/**
139	* Free a descriptor allocated by @a VBoxHGSMIBufferAlloc.
140	*
141	* @param pCtx the context containing the heap used
142	* @param pvBuffer the pointer returned by @a VBoxHGSMIBufferAlloc
143	*/
144	RTDECL(void) VBoxHGSMIBufferFree(PHGSMIGUESTCOMMANDCONTEXT pCtx,
145	void *pvBuffer)
146	{
147	#ifdef VBOX_WDDM_MINIPORT
148	VBoxSHGSMIHeapFree (&pCtx->heapCtx, pvBuffer);
149	#else
150	HGSMIHeapFree (&pCtx->heapCtx, pvBuffer);
151	#endif
152	}
153
154
155	/**
156	* Submit a command descriptor allocated by @a VBoxHGSMIBufferAlloc.
157	*
158	* @param pCtx the context containing the heap used
159	* @param pvBuffer the pointer returned by @a VBoxHGSMIBufferAlloc
160	*/
161	RTDECL(int) VBoxHGSMIBufferSubmit(PHGSMIGUESTCOMMANDCONTEXT pCtx,
162	void *pvBuffer)
163	{
164	/* Initialize the buffer and get the offset for port IO. */
165	HGSMIOFFSET offBuffer = HGSMIHeapBufferOffset (HGSMIGUESTCMDHEAP_GET(&pCtx->heapCtx), pvBuffer);
166
167	Assert(offBuffer != HGSMIOFFSET_VOID);
168	if (offBuffer != HGSMIOFFSET_VOID)
169	{
170	/* Submit the buffer to the host. */
171	VBoxVideoCmnPortWriteUlong(pCtx->port, offBuffer);
172	return VINF_SUCCESS;
173	}
174
175	return VERR_INVALID_PARAMETER;
176	}
177
178
179	/** Inform the host of the location of the host flags in VRAM via an HGSMI
180	* command. */
181	static int vboxHGSMIReportFlagsLocation(PHGSMIGUESTCOMMANDCONTEXT pCtx,
182	HGSMIOFFSET offLocation)
183	{
184	HGSMIBUFFERLOCATION *p;
185	int rc = VINF_SUCCESS;
186
187	/* Allocate the IO buffer. */
188	p = (HGSMIBUFFERLOCATION *)VBoxHGSMIBufferAlloc(pCtx,
189	sizeof(HGSMIBUFFERLOCATION),
190	HGSMI_CH_HGSMI,
191	HGSMI_CC_HOST_FLAGS_LOCATION);
192	if (p)
193	{
194	/* Prepare data to be sent to the host. */
195	p->offLocation = offLocation;
196	p->cbLocation = sizeof(HGSMIHOSTFLAGS);
197	rc = VBoxHGSMIBufferSubmit(pCtx, p);
198	/* Free the IO buffer. */
199	VBoxHGSMIBufferFree(pCtx, p);
200	}
201	else
202	rc = VERR_NO_MEMORY;
203	return rc;
204	}
205
206
207	/** Notify the host of HGSMI-related guest capabilities via an HGSMI command.
208	*/
209	static int vboxHGSMISendCapsInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
210	uint32_t fCaps)
211	{
212	VBVACAPS *pCaps;
213	int rc = VINF_SUCCESS;
214
215	/* Allocate the IO buffer. */
216	pCaps = (VBVACAPS *)VBoxHGSMIBufferAlloc(pCtx,
217	sizeof(VBVACAPS), HGSMI_CH_VBVA,
218	VBVA_INFO_CAPS);
219
220	if (pCaps)
221	{
222	/* Prepare data to be sent to the host. */
223	pCaps->rc = VERR_NOT_IMPLEMENTED;
224	pCaps->fCaps = fCaps;
225	rc = VBoxHGSMIBufferSubmit(pCtx, pCaps);
226	if (RT_SUCCESS(rc))
227	{
228	AssertRC(pCaps->rc);
229	rc = pCaps->rc;
230	}
231	/* Free the IO buffer. */
232	VBoxHGSMIBufferFree(pCtx, pCaps);
233	}
234	else
235	rc = VERR_NO_MEMORY;
236	return rc;
237	}
238
239
240	/**
241	* Notify the host of HGSMI-related guest capabilities via an HGSMI command.
242	* @returns IPRT status value.
243	* @returns VERR_NOT_IMPLEMENTED if the host does not support the command.
244	* @returns VERR_NO_MEMORY if a heap allocation fails.
245	* @param pCtx the context of the guest heap to use.
246	* @param fCaps the capabilities to report, see VBVACAPS.
247	*/
248	RTDECL(int) VBoxHGSMISendCapsInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
249	uint32_t fCaps)
250	{
251	return vboxHGSMISendCapsInfo(pCtx, fCaps);
252	}
253
254
255	/** Tell the host about the location of the area of VRAM set aside for the host
256	* heap. */
257	static int vboxHGSMIReportHostArea(PHGSMIGUESTCOMMANDCONTEXT pCtx,
258	uint32_t u32AreaOffset, uint32_t u32AreaSize)
259	{
260	VBVAINFOHEAP *p;
261	int rc = VINF_SUCCESS;
262
263	/* Allocate the IO buffer. */
264	p = (VBVAINFOHEAP *)VBoxHGSMIBufferAlloc(pCtx,
265	sizeof (VBVAINFOHEAP), HGSMI_CH_VBVA,
266	VBVA_INFO_HEAP);
267	if (p)
268	{
269	/* Prepare data to be sent to the host. */
270	p->u32HeapOffset = u32AreaOffset;
271	p->u32HeapSize = u32AreaSize;
272	rc = VBoxHGSMIBufferSubmit(pCtx, p);
273	/* Free the IO buffer. */
274	VBoxHGSMIBufferFree(pCtx, p);
275	}
276	else
277	rc = VERR_NO_MEMORY;
278	return rc;
279	}
280
281
282	/**
283	* Get the information needed to map the basic communication structures in
284	* device memory into our address space. All pointer parameters are optional.
285	*
286	* @param cbVRAM how much video RAM is allocated to the device
287	* @param poffVRAMBaseMapping where to save the offset from the start of the
288	* device VRAM of the whole area to map
289	* @param pcbMapping where to save the mapping size
290	* @param poffGuestHeapMemory where to save the offset into the mapped area
291	* of the guest heap backing memory
292	* @param pcbGuestHeapMemory where to save the size of the guest heap
293	* backing memory
294	* @param poffHostFlags where to save the offset into the mapped area
295	* of the host flags
296	*/
297	RTDECL(void) VBoxHGSMIGetBaseMappingInfo(uint32_t cbVRAM,
298	uint32_t *poffVRAMBaseMapping,
299	uint32_t *pcbMapping,
300	uint32_t *poffGuestHeapMemory,
301	uint32_t *pcbGuestHeapMemory,
302	uint32_t *poffHostFlags)
303	{
304	AssertPtrNullReturnVoid(poffVRAMBaseMapping);
305	AssertPtrNullReturnVoid(pcbMapping);
306	AssertPtrNullReturnVoid(poffGuestHeapMemory);
307	AssertPtrNullReturnVoid(pcbGuestHeapMemory);
308	AssertPtrNullReturnVoid(poffHostFlags);
309	if (poffVRAMBaseMapping)
310	*poffVRAMBaseMapping = cbVRAM - VBVA_ADAPTER_INFORMATION_SIZE;
311	if (pcbMapping)
312	*pcbMapping = VBVA_ADAPTER_INFORMATION_SIZE;
313	if (poffGuestHeapMemory)
314	*poffGuestHeapMemory = 0;
315	if (pcbGuestHeapMemory)
316	*pcbGuestHeapMemory = VBVA_ADAPTER_INFORMATION_SIZE
317	- sizeof(HGSMIHOSTFLAGS);
318	if (poffHostFlags)
319	*poffHostFlags = VBVA_ADAPTER_INFORMATION_SIZE
320	- sizeof(HGSMIHOSTFLAGS);
321	}
322
323
324	/**
325	* Set up the HGSMI guest-to-host command context.
326	* @returns iprt status value
327	* @param pCtx the context to set up
328	* @param pvGuestHeapMemory a pointer to the mapped backing memory for
329	* the guest heap
330	* @param cbGuestHeapMemory the size of the backing memory area
331	* @param offVRAMGuestHeapMemory the offset of the memory pointed to by
332	* @a pvGuestHeapMemory within the video RAM
333	*/
334	RTDECL(int) VBoxHGSMISetupGuestContext(PHGSMIGUESTCOMMANDCONTEXT pCtx,
335	void *pvGuestHeapMemory,
336	uint32_t cbGuestHeapMemory,
337	uint32_t offVRAMGuestHeapMemory,
338	const HGSMIENV *pEnv)
339	{
340	/** @todo should we be using a fixed ISA port value here? */
341	pCtx->port = (RTIOPORT)VGA_PORT_HGSMI_GUEST;
342	#ifdef VBOX_WDDM_MINIPORT
343	return VBoxSHGSMIInit(&pCtx->heapCtx, HGSMI_HEAP_TYPE_MA, pvGuestHeapMemory,
344	cbGuestHeapMemory, offVRAMGuestHeapMemory, pEnv);
345	#else
346	return HGSMIHeapSetup(&pCtx->heapCtx, HGSMI_HEAP_TYPE_MA, pvGuestHeapMemory,
347	cbGuestHeapMemory, offVRAMGuestHeapMemory, pEnv);
348	#endif
349	}
350
351
352	/**
353	* Get the information needed to map the area used by the host to send back
354	* requests.
355	*
356	* @param pCtx the context containing the heap to use
357	* @param cbVRAM how much video RAM is allocated to the device
358	* @param offVRAMBaseMapping the offset of the basic communication structures
359	* into the guest's VRAM
360	* @param poffVRAMHostArea where to store the offset into VRAM of the host
361	* heap area
362	* @param pcbHostArea where to store the size of the host heap area
363	*/
364	RTDECL(void) VBoxHGSMIGetHostAreaMapping(PHGSMIGUESTCOMMANDCONTEXT pCtx,
365	uint32_t cbVRAM,
366	uint32_t offVRAMBaseMapping,
367	uint32_t *poffVRAMHostArea,
368	uint32_t *pcbHostArea)
369	{
370	uint32_t offVRAMHostArea = offVRAMBaseMapping, cbHostArea = 0;
371
372	AssertPtrReturnVoid(poffVRAMHostArea);
373	AssertPtrReturnVoid(pcbHostArea);
374	VBoxQueryConfHGSMI(pCtx, VBOX_VBVA_CONF32_HOST_HEAP_SIZE, &cbHostArea);
375	if (cbHostArea != 0)
376	{
377	uint32_t cbHostAreaMaxSize = cbVRAM / 4;
378	/** @todo what is the idea of this? */
379	if (cbHostAreaMaxSize >= VBVA_ADAPTER_INFORMATION_SIZE)
380	{
381	cbHostAreaMaxSize -= VBVA_ADAPTER_INFORMATION_SIZE;
382	}
383	if (cbHostArea > cbHostAreaMaxSize)
384	{
385	cbHostArea = cbHostAreaMaxSize;
386	}
387	/* Round up to 4096 bytes. */
388	cbHostArea = (cbHostArea + 0xFFF) & ~0xFFF;
389	offVRAMHostArea = offVRAMBaseMapping - cbHostArea;
390	}
391
392	*pcbHostArea = cbHostArea;
393	*poffVRAMHostArea = offVRAMHostArea;
394	LogFunc(("offVRAMHostArea = 0x%08X, cbHostArea = 0x%08X\n",
395	offVRAMHostArea, cbHostArea));
396	}
397
398
399	/**
400	* Initialise the host context structure.
401	*
402	* @param pCtx the context structure to initialise
403	* @param pvBaseMapping where the basic HGSMI structures are mapped at
404	* @param offHostFlags the offset of the host flags into the basic HGSMI
405	* structures
406	* @param pvHostAreaMapping where the area for the host heap is mapped at
407	* @param offVRAMHostArea offset of the host heap area into VRAM
408	* @param cbHostArea size in bytes of the host heap area
409	*/
410	RTDECL(void) VBoxHGSMISetupHostContext(PHGSMIHOSTCOMMANDCONTEXT pCtx,
411	void *pvBaseMapping,
412	uint32_t offHostFlags,
413	void *pvHostAreaMapping,
414	uint32_t offVRAMHostArea,
415	uint32_t cbHostArea)
416	{
417	uint8_t pu8HostFlags = ((uint8_t )pvBaseMapping) + offHostFlags;
418	pCtx->pfHostFlags = (HGSMIHOSTFLAGS *)pu8HostFlags;
419	/** @todo should we really be using a fixed ISA port value here? */
420	pCtx->port = (RTIOPORT)VGA_PORT_HGSMI_HOST;
421	HGSMIAreaInitialize(&pCtx->areaCtx, pvHostAreaMapping, cbHostArea,
422	offVRAMHostArea);
423	}
424
425
426	/**
427	* Tell the host about the ways it can use to communicate back to us via an
428	* HGSMI command
429	*
430	* @returns iprt status value
431	* @param pCtx the context containing the heap to use
432	* @param offVRAMFlagsLocation where we wish the host to place its flags
433	* relative to the start of the VRAM
434	* @param fCaps additions HGSMI capabilities the guest
435	* supports
436	* @param offVRAMHostArea offset into VRAM of the host heap area
437	* @param cbHostArea size in bytes of the host heap area
438	*/
439	RTDECL(int) VBoxHGSMISendHostCtxInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
440	HGSMIOFFSET offVRAMFlagsLocation,
441	uint32_t fCaps,
442	uint32_t offVRAMHostArea,
443	uint32_t cbHostArea)
444	{
445	Log(("VBoxVideo::vboxSetupAdapterInfo\n"));
446
447	/* setup the flags first to ensure they are initialized by the time the
448	* host heap is ready */
449	int rc = vboxHGSMIReportFlagsLocation(pCtx, offVRAMFlagsLocation);
450	AssertRC(rc);
451	if (RT_SUCCESS(rc) && fCaps)
452	{
453	/* Inform about caps */
454	rc = vboxHGSMISendCapsInfo(pCtx, fCaps);
455	AssertRC(rc);
456	}
457	if (RT_SUCCESS (rc))
458	{
459	/* Report the host heap location. */
460	rc = vboxHGSMIReportHostArea(pCtx, offVRAMHostArea, cbHostArea);
461	AssertRC(rc);
462	}
463	Log(("VBoxVideo::vboxSetupAdapterInfo finished rc = %d\n", rc));
464	return rc;
465	}
466
467
468	/** Sanity test on first call. We do not worry about concurrency issues. */
469	static int testQueryConf(PHGSMIGUESTCOMMANDCONTEXT pCtx)
470	{
471	static bool cOnce = false;
472	uint32_t ulValue = 0;
473	int rc;
474
475	if (cOnce)
476	return VINF_SUCCESS;
477	cOnce = true;
478	rc = VBoxQueryConfHGSMI(pCtx, UINT32_MAX, &ulValue);
479	if (RT_SUCCESS(rc) && ulValue == UINT32_MAX)
480	return VINF_SUCCESS;
481	cOnce = false;
482	if (RT_FAILURE(rc))
483	return rc;
484	return VERR_INTERNAL_ERROR;
485	}
486
487
488	/**
489	* Query the host for an HGSMI configuration parameter via an HGSMI command.
490	* @returns iprt status value
491	* @param pCtx the context containing the heap used
492	* @param u32Index the index of the parameter to query,
493	* @see VBVACONF32::u32Index
494	* @param pulValue where to store the value of the parameter on success
495	*/
496	RTDECL(int) VBoxQueryConfHGSMI(PHGSMIGUESTCOMMANDCONTEXT pCtx,
497	uint32_t u32Index, uint32_t *pulValue)
498	{
499	int rc = VINF_SUCCESS;
500	VBVACONF32 *p;
501	LogFunc(("u32Index = %d\n", u32Index));
502
503	rc = testQueryConf(pCtx);
504	if (RT_FAILURE(rc))
505	return rc;
506	/* Allocate the IO buffer. */
507	p = (VBVACONF32 *)VBoxHGSMIBufferAlloc(pCtx,
508	sizeof(VBVACONF32), HGSMI_CH_VBVA,
509	VBVA_QUERY_CONF32);
510	if (p)
511	{
512	/* Prepare data to be sent to the host. */
513	p->u32Index = u32Index;
514	p->u32Value = UINT32_MAX;
515	rc = VBoxHGSMIBufferSubmit(pCtx, p);
516	if (RT_SUCCESS(rc))
517	{
518	*pulValue = p->u32Value;
519	LogFunc(("u32Value = %d\n", p->u32Value));
520	}
521	/* Free the IO buffer. */
522	VBoxHGSMIBufferFree(pCtx, p);
523	}
524	else
525	rc = VERR_NO_MEMORY;
526	LogFunc(("rc = %d\n", rc));
527	return rc;
528	}
529
530
531	/**
532	* Pass the host a new mouse pointer shape via an HGSMI command.
533	*
534	* @returns success or failure
535	* @param fFlags cursor flags, @see VMMDevReqMousePointer::fFlags
536	* @param cHotX horizontal position of the hot spot
537	* @param cHotY vertical position of the hot spot
538	* @param cWidth width in pixels of the cursor
539	* @param cHeight height in pixels of the cursor
540	* @param pPixels pixel data, @see VMMDevReqMousePointer for the format
541	* @param cbLength size in bytes of the pixel data
542	*/
543	RTDECL(int) VBoxHGSMIUpdatePointerShape(PHGSMIGUESTCOMMANDCONTEXT pCtx,
544	uint32_t fFlags,
545	uint32_t cHotX,
546	uint32_t cHotY,
547	uint32_t cWidth,
548	uint32_t cHeight,
549	uint8_t *pPixels,
550	uint32_t cbLength)
551	{
552	VBVAMOUSEPOINTERSHAPE *p;
553	uint32_t cbData = 0;
554	int rc = VINF_SUCCESS;
555
556	if (fFlags & VBOX_MOUSE_POINTER_SHAPE)
557	{
558	/* Size of the pointer data: sizeof (AND mask) + sizeof (XOR_MASK) */
559	cbData = ((((cWidth + 7) / 8) * cHeight + 3) & ~3)
560	+ cWidth * 4 * cHeight;
561	/* If shape is supplied, then always create the pointer visible.
562	* See comments in 'vboxUpdatePointerShape'
563	*/
564	fFlags \|= VBOX_MOUSE_POINTER_VISIBLE;
565	}
566	LogFlowFunc(("cbData %d, %dx%d\n", cbData, cWidth, cHeight));
567	if (cbData > cbLength)
568	{
569	LogFunc(("calculated pointer data size is too big (%d bytes, limit %d)\n",
570	cbData, cbLength));
571	return VERR_INVALID_PARAMETER;
572	}
573	/* Allocate the IO buffer. */
574	p = (VBVAMOUSEPOINTERSHAPE *)VBoxHGSMIBufferAlloc(pCtx,
575	sizeof(VBVAMOUSEPOINTERSHAPE)
576	+ cbData,
577	HGSMI_CH_VBVA,
578	VBVA_MOUSE_POINTER_SHAPE);
579	if (p)
580	{
581	/* Prepare data to be sent to the host. */
582	/* Will be updated by the host. */
583	p->i32Result = VINF_SUCCESS;
584	/* We have our custom flags in the field */
585	p->fu32Flags = fFlags;
586	p->u32HotX = cHotX;
587	p->u32HotY = cHotY;
588	p->u32Width = cWidth;
589	p->u32Height = cHeight;
590	if (p->fu32Flags & VBOX_MOUSE_POINTER_SHAPE)
591	/* Copy the actual pointer data. */
592	memcpy (p->au8Data, pPixels, cbData);
593	rc = VBoxHGSMIBufferSubmit(pCtx, p);
594	if (RT_SUCCESS(rc))
595	rc = p->i32Result;
596	/* Free the IO buffer. */
597	VBoxHGSMIBufferFree(pCtx, p);
598	}
599	else
600	rc = VERR_NO_MEMORY;
601	LogFlowFunc(("rc %d\n", rc));
602	return rc;
603	}
604
605
606	/**
607	* Report the guest cursor position. The host may wish to use this information
608	* to re-position its own cursor (though this is currently unlikely). The
609	* current host cursor position is returned.
610	* @param pCtx The context containing the heap used.
611	* @param fReportPosition Are we reporting a position?
612	* @param x Guest cursor X position.
613	* @param y Guest cursor Y position.
614	* @param pxHost Host cursor X position is stored here. Optional.
615	* @param pyHost Host cursor Y position is stored here. Optional.
616	* @returns iprt status code.
617	* @returns VERR_NO_MEMORY HGSMI heap allocation failed.
618	*/
619	RTDECL(int) VBoxHGSMICursorPosition(PHGSMIGUESTCOMMANDCONTEXT pCtx, bool fReportPosition, uint32_t x, uint32_t y,
620	uint32_t pxHost, uint32_t pyHost)
621	{
622	int rc = VINF_SUCCESS;
623	VBVACURSORPOSITION *p;
624	Log(("%s: x=%u, y=%u\n", __PRETTY_FUNCTION__, (unsigned)x, (unsigned)y));
625
626	/* Allocate the IO buffer. */
627	p = (VBVACURSORPOSITION *)VBoxHGSMIBufferAlloc(pCtx, sizeof(VBVACURSORPOSITION), HGSMI_CH_VBVA, VBVA_CURSOR_POSITION);
628	if (p)
629	{
630	/* Prepare data to be sent to the host. */
631	p->fReportPosition = fReportPosition ? 1 : 0;
632	p->x = x;
633	p->y = y;
634	rc = VBoxHGSMIBufferSubmit(pCtx, p);
635	if (RT_SUCCESS(rc))
636	{
637	if (pxHost)
638	*pxHost = p->x;
639	if (pyHost)
640	*pyHost = p->y;
641	Log(("%s: return: x=%u, y=%u\n", __PRETTY_FUNCTION__, (unsigned)x, (unsigned)y));
642	}
643	/* Free the IO buffer. */
644	VBoxHGSMIBufferFree(pCtx, p);
645	}
646	else
647	rc = VERR_NO_MEMORY;
648	LogFunc(("rc = %d\n", rc));
649	return rc;
650	}
651
652
653	/** @todo Mouse pointer position to be read from VMMDev memory, address of the memory region
654	* can be queried from VMMDev via an IOCTL. This VMMDev memory region will contain
655	* host information which is needed by the guest.
656	*
657	* Reading will not cause a switch to the host.
658	*
659	* Have to take into account:
660	* * synchronization: host must write to the memory only from EMT,
661	* large structures must be read under flag, which tells the host
662	* that the guest is currently reading the memory (OWNER flag?).
663	* * guest writes: may be allocate a page for the host info and make
664	* the page readonly for the guest.
665	* * the information should be available only for additions drivers.
666	* * VMMDev additions driver will inform the host which version of the info it expects,
667	* host must support all versions.
668	*
669	*/

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source: vbox/trunk/src/VBox/Additions/common/VBoxVideo/HGSMIBase.cpp@ 55043

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