VMMDevHGCM.cpp@ 89121

Last change on this file since 89121 was 83558, checked in by vboxsync, 5 years ago
VMMDev: Adjusted RTMemFreeZ use - must use our private pGuestParm->u.ptr.cbData member not the pHostParm->u.pointer.size one as it can have been modified by the HGCM service. bugref:9698
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1	/* $Id: VMMDevHGCM.cpp 83558 2020-04-04 23:35:03Z vboxsync $ */
2	/** @file
3	* VMMDev - HGCM - Host-Guest Communication Manager Device.
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_DEV_VMM
23	#include <iprt/alloc.h>
24	#include <iprt/asm.h>
25	#include <iprt/assert.h>
26	#include <iprt/param.h>
27	#include <iprt/string.h>
28
29	#include <VBox/AssertGuest.h>
30	#include <VBox/err.h>
31	#include <VBox/hgcmsvc.h>
32	#include <VBox/log.h>
33
34	#include "VMMDevHGCM.h"
35
36	#ifdef DEBUG
37	# define VBOX_STRICT_GUEST
38	#endif
39
40	#ifdef VBOX_WITH_DTRACE
41	# include "dtrace/VBoxDD.h"
42	#else
43	# define VBOXDD_HGCMCALL_ENTER(a,b,c,d) do { } while (0)
44	# define VBOXDD_HGCMCALL_COMPLETED_REQ(a,b) do { } while (0)
45	# define VBOXDD_HGCMCALL_COMPLETED_EMT(a,b) do { } while (0)
46	# define VBOXDD_HGCMCALL_COMPLETED_DONE(a,b,c,d) do { } while (0)
47	#endif
48
49
50	/*********************************************************************************************************************************
51	* Structures and Typedefs *
52	*********************************************************************************************************************************/
53	typedef enum VBOXHGCMCMDTYPE
54	{
55	VBOXHGCMCMDTYPE_LOADSTATE = 0,
56	VBOXHGCMCMDTYPE_CONNECT,
57	VBOXHGCMCMDTYPE_DISCONNECT,
58	VBOXHGCMCMDTYPE_CALL,
59	VBOXHGCMCMDTYPE_SizeHack = 0x7fffffff
60	} VBOXHGCMCMDTYPE;
61
62	/**
63	* Information about a 32 or 64 bit parameter.
64	*/
65	typedef struct VBOXHGCMPARMVAL
66	{
67	/** Actual value. Both 32 and 64 bit is saved here. */
68	uint64_t u64Value;
69
70	/** Offset from the start of the request where the value is stored. */
71	uint32_t offValue;
72
73	/** Size of the value: 4 for 32 bit and 8 for 64 bit. */
74	uint32_t cbValue;
75
76	} VBOXHGCMPARMVAL;
77
78	/**
79	* Information about a pointer parameter.
80	*/
81	typedef struct VBOXHGCMPARMPTR
82	{
83	/** Size of the buffer described by the pointer parameter. */
84	uint32_t cbData;
85
86	/** @todo save 8 bytes here by putting offFirstPage, cPages, and f32Direction
87	* into a bitfields like in VBOXHGCMPARMPAGES. */
88	/** Offset in the first physical page of the region. */
89	uint32_t offFirstPage;
90
91	/** How many pages. */
92	uint32_t cPages;
93
94	/** How the buffer should be copied VBOX_HGCM_F_PARM_. /
95	uint32_t fu32Direction;
96
97	/** Pointer to array of the GC physical addresses for these pages.
98	* It is assumed that the physical address of the locked resident guest page
99	* does not change. */
100	RTGCPHYS *paPages;
101
102	/** For single page requests. */
103	RTGCPHYS GCPhysSinglePage;
104
105	} VBOXHGCMPARMPTR;
106
107
108	/**
109	* Pages w/o bounce buffering.
110	*/
111	typedef struct VBOXHGCMPARMPAGES
112	{
113	/** The buffer size. */
114	uint32_t cbData;
115	/** Start of buffer offset into the first page. */
116	uint32_t offFirstPage : 12;
117	/** VBOX_HGCM_F_PARM_XXX flags. */
118	uint32_t fFlags : 3;
119	/** Set if we've locked all the pages. */
120	uint32_t fLocked : 1;
121	/** Number of pages. */
122	uint32_t cPages : 16;
123	/**< Array of page locks followed by array of page pointers, the first page
124	* pointer is adjusted by offFirstPage. */
125	PPGMPAGEMAPLOCK paPgLocks;
126	} VBOXHGCMPARMPAGES;
127
128	/**
129	* Information about a guest HGCM parameter.
130	*/
131	typedef struct VBOXHGCMGUESTPARM
132	{
133	/** The parameter type. */
134	HGCMFunctionParameterType enmType;
135
136	union
137	{
138	VBOXHGCMPARMVAL val;
139	VBOXHGCMPARMPTR ptr;
140	VBOXHGCMPARMPAGES Pages;
141	} u;
142
143	} VBOXHGCMGUESTPARM;
144
145	typedef struct VBOXHGCMCMD
146	{
147	/** Active commands, list is protected by critsectHGCMCmdList. */
148	RTLISTNODE node;
149
150	/** The type of the command (VBOXHGCMCMDTYPE). */
151	uint8_t enmCmdType;
152
153	/** Whether the command was cancelled by the guest. */
154	bool fCancelled;
155
156	/** Set if allocated from the memory cache, clear if heap. */
157	bool fMemCache;
158
159	/** Whether the command was restored from saved state. */
160	bool fRestored : 1;
161	/** Whether this command has a no-bounce page list and needs to be restored
162	* from guest memory the old fashioned way. */
163	bool fRestoreFromGuestMem : 1;
164
165	/** Copy of VMMDevRequestHeader::fRequestor.
166	* @note Only valid if VBOXGSTINFO2_F_REQUESTOR_INFO is set in
167	* VMMDevState.guestInfo2.fFeatures. */
168	uint32_t fRequestor;
169
170	/** GC physical address of the guest request. */
171	RTGCPHYS GCPhys;
172
173	/** Request packet size. */
174	uint32_t cbRequest;
175
176	/** The type of the guest request. */
177	VMMDevRequestType enmRequestType;
178
179	/** Pointer to the locked request, NULL if not locked. */
180	void *pvReqLocked;
181	/** The PGM lock for GCPhys if pvReqLocked is not NULL. */
182	PGMPAGEMAPLOCK ReqMapLock;
183
184	/** The STAM_GET_TS() value when the request arrived. */
185	uint64_t tsArrival;
186	/** The STAM_GET_TS() value when the hgcmR3Completed() is called. */
187	uint64_t tsComplete;
188
189	union
190	{
191	struct
192	{
193	uint32_t u32ClientID;
194	HGCMServiceLocation pLoc; /< Allocated after this structure. /
195	} connect;
196
197	struct
198	{
199	uint32_t u32ClientID;
200	} disconnect;
201
202	struct
203	{
204	/* Number of elements in paGuestParms and paHostParms arrays. */
205	uint32_t cParms;
206
207	uint32_t u32ClientID;
208
209	uint32_t u32Function;
210
211	/** Pointer to information about guest parameters in case of a Call request.
212	* Follows this structure in the same memory block.
213	*/
214	VBOXHGCMGUESTPARM *paGuestParms;
215
216	/** Pointer to converted host parameters in case of a Call request.
217	* Follows this structure in the same memory block.
218	*/
219	VBOXHGCMSVCPARM *paHostParms;
220
221	/* VBOXHGCMGUESTPARM[] */
222	/* VBOXHGCMSVCPARM[] */
223	} call;
224	} u;
225	} VBOXHGCMCMD;
226
227
228	/**
229	* Version for the memory cache.
230	*/
231	typedef struct VBOXHGCMCMDCACHED
232	{
233	VBOXHGCMCMD Core; /*< 112 /
234	VBOXHGCMGUESTPARM aGuestParms[6]; /*< 40 6 = 240 */
235	VBOXHGCMSVCPARM aHostParms[6]; /*< 24 6 = 144 */
236	} VBOXHGCMCMDCACHED; /*< 112+240+144 = 496 /
237	AssertCompile(sizeof(VBOXHGCMCMD) <= 112);
238	AssertCompile(sizeof(VBOXHGCMGUESTPARM) <= 40);
239	AssertCompile(sizeof(VBOXHGCMSVCPARM) <= 24);
240	AssertCompile(sizeof(VBOXHGCMCMDCACHED) <= 512);
241	AssertCompile(sizeof(VBOXHGCMCMDCACHED) > sizeof(VBOXHGCMCMD) + sizeof(HGCMServiceLocation));
242
243
244	DECLINLINE(int) vmmdevR3HgcmCmdListLock(PVMMDEVCC pThisCC)
245	{
246	int rc = RTCritSectEnter(&pThisCC->critsectHGCMCmdList);
247	AssertRC(rc);
248	return rc;
249	}
250
251	DECLINLINE(void) vmmdevR3HgcmCmdListUnlock(PVMMDEVCC pThisCC)
252	{
253	int rc = RTCritSectLeave(&pThisCC->critsectHGCMCmdList);
254	AssertRC(rc);
255	}
256
257	/** Allocate and initialize VBOXHGCMCMD structure for HGCM request.
258	*
259	* @returns Pointer to the command on success, NULL otherwise.
260	* @param pThisCC The VMMDev ring-3 instance data.
261	* @param enmCmdType Type of the command.
262	* @param GCPhys The guest physical address of the HGCM request.
263	* @param cbRequest The size of the HGCM request.
264	* @param cParms Number of HGCM parameters for VBOXHGCMCMDTYPE_CALL command.
265	* @param fRequestor The VMMDevRequestHeader::fRequestor value.
266	*/
267	static PVBOXHGCMCMD vmmdevR3HgcmCmdAlloc(PVMMDEVCC pThisCC, VBOXHGCMCMDTYPE enmCmdType, RTGCPHYS GCPhys,
268	uint32_t cbRequest, uint32_t cParms, uint32_t fRequestor)
269	{
270	#if 1
271	/*
272	* Try use the cache.
273	*/
274	VBOXHGCMCMDCACHED *pCmdCached;
275	AssertCompile(sizeof(*pCmdCached) >= sizeof(VBOXHGCMCMD) + sizeof(HGCMServiceLocation));
276	if (cParms <= RT_ELEMENTS(pCmdCached->aGuestParms))
277	{
278	int rc = RTMemCacheAllocEx(pThisCC->hHgcmCmdCache, (void **)&pCmdCached);
279	if (RT_SUCCESS(rc))
280	{
281	RT_ZERO(*pCmdCached);
282	pCmdCached->Core.fMemCache = true;
283	pCmdCached->Core.GCPhys = GCPhys;
284	pCmdCached->Core.cbRequest = cbRequest;
285	pCmdCached->Core.enmCmdType = enmCmdType;
286	pCmdCached->Core.fRequestor = fRequestor;
287	if (enmCmdType == VBOXHGCMCMDTYPE_CALL)
288	{
289	pCmdCached->Core.u.call.cParms = cParms;
290	pCmdCached->Core.u.call.paGuestParms = pCmdCached->aGuestParms;
291	pCmdCached->Core.u.call.paHostParms = pCmdCached->aHostParms;
292	}
293	else if (enmCmdType == VBOXHGCMCMDTYPE_CONNECT)
294	pCmdCached->Core.u.connect.pLoc = (HGCMServiceLocation *)(&pCmdCached->Core + 1);
295
296	return &pCmdCached->Core;
297	}
298	return NULL;
299	}
300	STAM_REL_COUNTER_INC(&pThisCC->StatHgcmLargeCmdAllocs);
301
302	#else
303	RT_NOREF(pThisCC);
304	#endif
305
306	/* Size of required memory buffer. */
307	const uint32_t cbCmd = sizeof(VBOXHGCMCMD) + cParms * (sizeof(VBOXHGCMGUESTPARM) + sizeof(VBOXHGCMSVCPARM))
308	+ (enmCmdType == VBOXHGCMCMDTYPE_CONNECT ? sizeof(HGCMServiceLocation) : 0);
309
310	PVBOXHGCMCMD pCmd = (PVBOXHGCMCMD)RTMemAllocZ(cbCmd);
311	if (pCmd)
312	{
313	pCmd->enmCmdType = enmCmdType;
314	pCmd->GCPhys = GCPhys;
315	pCmd->cbRequest = cbRequest;
316	pCmd->fRequestor = fRequestor;
317
318	if (enmCmdType == VBOXHGCMCMDTYPE_CALL)
319	{
320	pCmd->u.call.cParms = cParms;
321	if (cParms)
322	{
323	pCmd->u.call.paGuestParms = (VBOXHGCMGUESTPARM )((uint8_t )pCmd
324	+ sizeof(struct VBOXHGCMCMD));
325	pCmd->u.call.paHostParms = (VBOXHGCMSVCPARM )((uint8_t )pCmd->u.call.paGuestParms
326	+ cParms * sizeof(VBOXHGCMGUESTPARM));
327	}
328	}
329	else if (enmCmdType == VBOXHGCMCMDTYPE_CONNECT)
330	pCmd->u.connect.pLoc = (HGCMServiceLocation *)(pCmd + 1);
331	}
332	return pCmd;
333	}
334
335	/** Deallocate VBOXHGCMCMD memory.
336	*
337	* @param pDevIns The device instance.
338	* @param pThisCC The VMMDev ring-3 instance data.
339	* @param pCmd Command to deallocate.
340	*/
341	static void vmmdevR3HgcmCmdFree(PPDMDEVINS pDevIns, PVMMDEVCC pThisCC, PVBOXHGCMCMD pCmd)
342	{
343	if (pCmd)
344	{
345	if (pCmd->enmCmdType == VBOXHGCMCMDTYPE_CALL)
346	{
347	uint32_t i;
348	for (i = 0; i < pCmd->u.call.cParms; ++i)
349	{
350	VBOXHGCMSVCPARM * const pHostParm = &pCmd->u.call.paHostParms[i];
351	VBOXHGCMGUESTPARM * const pGuestParm = &pCmd->u.call.paGuestParms[i];
352
353	if ( pGuestParm->enmType == VMMDevHGCMParmType_LinAddr_In
354	\|\| pGuestParm->enmType == VMMDevHGCMParmType_LinAddr_Out
355	\|\| pGuestParm->enmType == VMMDevHGCMParmType_LinAddr
356	\|\| pGuestParm->enmType == VMMDevHGCMParmType_PageList
357	\|\| pGuestParm->enmType == VMMDevHGCMParmType_ContiguousPageList)
358	{
359	Assert(pHostParm->type == VBOX_HGCM_SVC_PARM_PTR);
360	if (pGuestParm->u.ptr.paPages != &pGuestParm->u.ptr.GCPhysSinglePage)
361	RTMemFree(pGuestParm->u.ptr.paPages);
362	RTMemFreeZ(pHostParm->u.pointer.addr, pGuestParm->u.ptr.cbData);
363	}
364	else if (pGuestParm->enmType == VMMDevHGCMParmType_Embedded)
365	{
366	Assert(pHostParm->type == VBOX_HGCM_SVC_PARM_PTR);
367	RTMemFreeZ(pHostParm->u.pointer.addr, pGuestParm->u.ptr.cbData);
368	}
369	else if (pGuestParm->enmType == VMMDevHGCMParmType_NoBouncePageList)
370	{
371	Assert(pHostParm->type == VBOX_HGCM_SVC_PARM_PAGES);
372	if (pGuestParm->u.Pages.paPgLocks)
373	{
374	if (pGuestParm->u.Pages.fLocked)
375	PDMDevHlpPhysBulkReleasePageMappingLocks(pDevIns, pGuestParm->u.Pages.cPages,
376	pGuestParm->u.Pages.paPgLocks);
377	RTMemFree(pGuestParm->u.Pages.paPgLocks);
378	pGuestParm->u.Pages.paPgLocks = NULL;
379	}
380	}
381	else
382	Assert(pHostParm->type != VBOX_HGCM_SVC_PARM_PTR && pHostParm->type != VBOX_HGCM_SVC_PARM_PAGES);
383	}
384	}
385
386	if (pCmd->pvReqLocked)
387	{
388	PDMDevHlpPhysReleasePageMappingLock(pDevIns, &pCmd->ReqMapLock);
389	pCmd->pvReqLocked = NULL;
390	}
391
392	#if 1
393	if (pCmd->fMemCache)
394	RTMemCacheFree(pThisCC->hHgcmCmdCache, pCmd);
395	else
396	#endif
397	RTMemFree(pCmd);
398	}
399	}
400
401	/** Add VBOXHGCMCMD to the list of pending commands.
402	*
403	* @returns VBox status code.
404	* @param pDevIns The device instance.
405	* @param pThis The VMMDev shared instance data.
406	* @param pThisCC The VMMDev ring-3 instance data.
407	* @param pCmd Command to add.
408	*/
409	static int vmmdevR3HgcmAddCommand(PPDMDEVINS pDevIns, PVMMDEV pThis, PVMMDEVCC pThisCC, PVBOXHGCMCMD pCmd)
410	{
411	int rc = vmmdevR3HgcmCmdListLock(pThisCC);
412	AssertRCReturn(rc, rc);
413
414	LogFlowFunc(("%p type %d\n", pCmd, pCmd->enmCmdType));
415
416	RTListPrepend(&pThisCC->listHGCMCmd, &pCmd->node);
417
418	/* Automatically enable HGCM events, if there are HGCM commands. */
419	if ( pCmd->enmCmdType == VBOXHGCMCMDTYPE_CONNECT
420	\|\| pCmd->enmCmdType == VBOXHGCMCMDTYPE_DISCONNECT
421	\|\| pCmd->enmCmdType == VBOXHGCMCMDTYPE_CALL)
422	{
423	LogFunc(("u32HGCMEnabled = %d\n", pThisCC->u32HGCMEnabled));
424	if (ASMAtomicCmpXchgU32(&pThisCC->u32HGCMEnabled, 1, 0))
425	VMMDevCtlSetGuestFilterMask(pDevIns, pThis, pThisCC, VMMDEV_EVENT_HGCM, 0);
426	}
427
428	vmmdevR3HgcmCmdListUnlock(pThisCC);
429	return rc;
430	}
431
432	/** Remove VBOXHGCMCMD from the list of pending commands.
433	*
434	* @returns VBox status code.
435	* @param pThisCC The VMMDev ring-3 instance data.
436	* @param pCmd Command to remove.
437	*/
438	static int vmmdevR3HgcmRemoveCommand(PVMMDEVCC pThisCC, PVBOXHGCMCMD pCmd)
439	{
440	int rc = vmmdevR3HgcmCmdListLock(pThisCC);
441	AssertRCReturn(rc, rc);
442
443	LogFlowFunc(("%p\n", pCmd));
444
445	RTListNodeRemove(&pCmd->node);
446
447	vmmdevR3HgcmCmdListUnlock(pThisCC);
448	return rc;
449	}
450
451	/**
452	* Find a HGCM command by its physical address.
453	*
454	* The caller is responsible for taking the command list lock before calling
455	* this function.
456	*
457	* @returns Pointer to the command on success, NULL otherwise.
458	* @param pThisCC The VMMDev ring-3 instance data.
459	* @param GCPhys The physical address of the command we're looking for.
460	*/
461	DECLINLINE(PVBOXHGCMCMD) vmmdevR3HgcmFindCommandLocked(PVMMDEVCC pThisCC, RTGCPHYS GCPhys)
462	{
463	PVBOXHGCMCMD pCmd;
464	RTListForEach(&pThisCC->listHGCMCmd, pCmd, VBOXHGCMCMD, node)
465	{
466	if (pCmd->GCPhys == GCPhys)
467	return pCmd;
468	}
469	return NULL;
470	}
471
472	/** Copy VMMDevHGCMConnect request data from the guest to VBOXHGCMCMD command.
473	*
474	* @param pHGCMConnect The source guest request (cached in host memory).
475	* @param pCmd Destination command.
476	*/
477	static void vmmdevR3HgcmConnectFetch(const VMMDevHGCMConnect *pHGCMConnect, PVBOXHGCMCMD pCmd)
478	{
479	pCmd->enmRequestType = pHGCMConnect->header.header.requestType;
480	pCmd->u.connect.u32ClientID = pHGCMConnect->u32ClientID;
481	*pCmd->u.connect.pLoc = pHGCMConnect->loc;
482	}
483
484	/** Handle VMMDevHGCMConnect request.
485	*
486	* @param pDevIns The device instance.
487	* @param pThis The VMMDev shared instance data.
488	* @param pThisCC The VMMDev ring-3 instance data.
489	* @param pHGCMConnect The guest request (cached in host memory).
490	* @param GCPhys The physical address of the request.
491	*/
492	int vmmdevR3HgcmConnect(PPDMDEVINS pDevIns, PVMMDEV pThis, PVMMDEVCC pThisCC,
493	const VMMDevHGCMConnect *pHGCMConnect, RTGCPHYS GCPhys)
494	{
495	int rc;
496	PVBOXHGCMCMD pCmd = vmmdevR3HgcmCmdAlloc(pThisCC, VBOXHGCMCMDTYPE_CONNECT, GCPhys, pHGCMConnect->header.header.size, 0,
497	pHGCMConnect->header.header.fRequestor);
498	if (pCmd)
499	{
500	vmmdevR3HgcmConnectFetch(pHGCMConnect, pCmd);
501
502	/* Only allow the guest to use existing services! */
503	ASSERT_GUEST(pHGCMConnect->loc.type == VMMDevHGCMLoc_LocalHost_Existing);
504	pCmd->u.connect.pLoc->type = VMMDevHGCMLoc_LocalHost_Existing;
505
506	vmmdevR3HgcmAddCommand(pDevIns, pThis, pThisCC, pCmd);
507	rc = pThisCC->pHGCMDrv->pfnConnect(pThisCC->pHGCMDrv, pCmd, pCmd->u.connect.pLoc, &pCmd->u.connect.u32ClientID);
508	if (RT_FAILURE(rc))
509	vmmdevR3HgcmRemoveCommand(pThisCC, pCmd);
510	}
511	else
512	rc = VERR_NO_MEMORY;
513
514	return rc;
515	}
516
517	/** Copy VMMDevHGCMDisconnect request data from the guest to VBOXHGCMCMD command.
518	*
519	* @param pHGCMDisconnect The source guest request (cached in host memory).
520	* @param pCmd Destination command.
521	*/
522	static void vmmdevR3HgcmDisconnectFetch(const VMMDevHGCMDisconnect *pHGCMDisconnect, PVBOXHGCMCMD pCmd)
523	{
524	pCmd->enmRequestType = pHGCMDisconnect->header.header.requestType;
525	pCmd->u.disconnect.u32ClientID = pHGCMDisconnect->u32ClientID;
526	}
527
528	/** Handle VMMDevHGCMDisconnect request.
529	*
530	* @param pDevIns The device instance.
531	* @param pThis The VMMDev shared instance data.
532	* @param pThisCC The VMMDev ring-3 instance data.
533	* @param pHGCMDisconnect The guest request (cached in host memory).
534	* @param GCPhys The physical address of the request.
535	*/
536	int vmmdevR3HgcmDisconnect(PPDMDEVINS pDevIns, PVMMDEV pThis, PVMMDEVCC pThisCC,
537	const VMMDevHGCMDisconnect *pHGCMDisconnect, RTGCPHYS GCPhys)
538	{
539	int rc;
540	PVBOXHGCMCMD pCmd = vmmdevR3HgcmCmdAlloc(pThisCC, VBOXHGCMCMDTYPE_DISCONNECT, GCPhys, pHGCMDisconnect->header.header.size, 0,
541	pHGCMDisconnect->header.header.fRequestor);
542	if (pCmd)
543	{
544	vmmdevR3HgcmDisconnectFetch(pHGCMDisconnect, pCmd);
545
546	vmmdevR3HgcmAddCommand(pDevIns, pThis, pThisCC, pCmd);
547	rc = pThisCC->pHGCMDrv->pfnDisconnect(pThisCC->pHGCMDrv, pCmd, pCmd->u.disconnect.u32ClientID);
548	if (RT_FAILURE(rc))
549	vmmdevR3HgcmRemoveCommand(pThisCC, pCmd);
550	}
551	else
552	rc = VERR_NO_MEMORY;
553
554	return rc;
555	}
556
557	/** Translate LinAddr parameter type to the direction of data transfer.
558	*
559	* @returns VBOX_HGCM_F_PARM_DIRECTION_* flags.
560	* @param enmType Type of the LinAddr parameter.
561	*/
562	static uint32_t vmmdevR3HgcmParmTypeToDirection(HGCMFunctionParameterType enmType)
563	{
564	if (enmType == VMMDevHGCMParmType_LinAddr_In) return VBOX_HGCM_F_PARM_DIRECTION_TO_HOST;
565	if (enmType == VMMDevHGCMParmType_LinAddr_Out) return VBOX_HGCM_F_PARM_DIRECTION_FROM_HOST;
566	return VBOX_HGCM_F_PARM_DIRECTION_BOTH;
567	}
568
569	/** Check if list of pages in a HGCM pointer parameter corresponds to a contiguous buffer.
570	*
571	* @returns true if pages are contiguous, false otherwise.
572	* @param pPtr Information about a pointer HGCM parameter.
573	*/
574	DECLINLINE(bool) vmmdevR3HgcmGuestBufferIsContiguous(const VBOXHGCMPARMPTR *pPtr)
575	{
576	if (pPtr->cPages == 1)
577	return true;
578	RTGCPHYS64 Phys = pPtr->paPages[0] + PAGE_SIZE;
579	if (Phys != pPtr->paPages[1])
580	return false;
581	if (pPtr->cPages > 2)
582	{
583	uint32_t iPage = 2;
584	do
585	{
586	Phys += PAGE_SIZE;
587	if (Phys != pPtr->paPages[iPage])
588	return false;
589	++iPage;
590	} while (iPage < pPtr->cPages);
591	}
592	return true;
593	}
594
595	/** Copy data from guest memory to the host buffer.
596	*
597	* @returns VBox status code.
598	* @param pDevIns The device instance for PDMDevHlp.
599	* @param pvDst The destination host buffer.
600	* @param cbDst Size of the destination host buffer.
601	* @param pPtr Description of the source HGCM pointer parameter.
602	*/
603	static int vmmdevR3HgcmGuestBufferRead(PPDMDEVINSR3 pDevIns, void pvDst, uint32_t cbDst, const VBOXHGCMPARMPTR pPtr)
604	{
605	/*
606	* Try detect contiguous buffers.
607	*/
608	/** @todo We need a flag for indicating this. */
609	if (vmmdevR3HgcmGuestBufferIsContiguous(pPtr))
610	return PDMDevHlpPhysRead(pDevIns, pPtr->paPages[0] \| pPtr->offFirstPage, pvDst, cbDst);
611
612	/*
613	* Page by page fallback.
614	*/
615	uint8_t pu8Dst = (uint8_t )pvDst;
616	uint32_t offPage = pPtr->offFirstPage;
617	uint32_t cbRemaining = cbDst;
618
619	for (uint32_t iPage = 0; iPage < pPtr->cPages && cbRemaining > 0; ++iPage)
620	{
621	uint32_t cbToRead = PAGE_SIZE - offPage;
622	if (cbToRead > cbRemaining)
623	cbToRead = cbRemaining;
624
625	/* Skip invalid pages. */
626	const RTGCPHYS GCPhys = pPtr->paPages[iPage];
627	if (GCPhys != NIL_RTGCPHYS)
628	{
629	int rc = PDMDevHlpPhysRead(pDevIns, GCPhys + offPage, pu8Dst, cbToRead);
630	AssertMsgReturn(RT_SUCCESS(rc), ("rc=%Rrc GCPhys=%RGp offPage=%#x cbToRead=%#x\n", rc, GCPhys, offPage, cbToRead), rc);
631	}
632
633	offPage = 0; /* A next page is read from 0 offset. */
634	cbRemaining -= cbToRead;
635	pu8Dst += cbToRead;
636	}
637
638	return VINF_SUCCESS;
639	}
640
641	/** Copy data from the host buffer to guest memory.
642	*
643	* @returns VBox status code.
644	* @param pDevIns The device instance for PDMDevHlp.
645	* @param pPtr Description of the destination HGCM pointer parameter.
646	* @param pvSrc The source host buffer.
647	* @param cbSrc Size of the source host buffer.
648	*/
649	static int vmmdevR3HgcmGuestBufferWrite(PPDMDEVINSR3 pDevIns, const VBOXHGCMPARMPTR pPtr, const void pvSrc, uint32_t cbSrc)
650	{
651	int rc = VINF_SUCCESS;
652
653	uint8_t pu8Src = (uint8_t )pvSrc;
654	uint32_t offPage = pPtr->offFirstPage;
655	uint32_t cbRemaining = RT_MIN(cbSrc, pPtr->cbData);
656
657	uint32_t iPage;
658	for (iPage = 0; iPage < pPtr->cPages && cbRemaining > 0; ++iPage)
659	{
660	uint32_t cbToWrite = PAGE_SIZE - offPage;
661	if (cbToWrite > cbRemaining)
662	cbToWrite = cbRemaining;
663
664	/* Skip invalid pages. */
665	const RTGCPHYS GCPhys = pPtr->paPages[iPage];
666	if (GCPhys != NIL_RTGCPHYS)
667	{
668	rc = PDMDevHlpPhysWrite(pDevIns, GCPhys + offPage, pu8Src, cbToWrite);
669	AssertRCBreak(rc);
670	}
671
672	offPage = 0; /* A next page is written at 0 offset. */
673	cbRemaining -= cbToWrite;
674	pu8Src += cbToWrite;
675	}
676
677	return rc;
678	}
679
680	/** Initializes pCmd->paHostParms from already initialized pCmd->paGuestParms.
681	* Allocates memory for pointer parameters and copies data from the guest.
682	*
683	* @returns VBox status code that the guest should see.
684	* @param pDevIns The device instance.
685	* @param pCmd Command structure where host parameters needs initialization.
686	* @param pbReq The request buffer.
687	*/
688	static int vmmdevR3HgcmInitHostParameters(PPDMDEVINS pDevIns, PVBOXHGCMCMD pCmd, uint8_t const *pbReq)
689	{
690	AssertReturn(pCmd->enmCmdType == VBOXHGCMCMDTYPE_CALL, VERR_INTERNAL_ERROR);
691
692	for (uint32_t i = 0; i < pCmd->u.call.cParms; ++i)
693	{
694	VBOXHGCMGUESTPARM * const pGuestParm = &pCmd->u.call.paGuestParms[i];
695	VBOXHGCMSVCPARM * const pHostParm = &pCmd->u.call.paHostParms[i];
696
697	switch (pGuestParm->enmType)
698	{
699	case VMMDevHGCMParmType_32bit:
700	{
701	pHostParm->type = VBOX_HGCM_SVC_PARM_32BIT;
702	pHostParm->u.uint32 = (uint32_t)pGuestParm->u.val.u64Value;
703
704	break;
705	}
706
707	case VMMDevHGCMParmType_64bit:
708	{
709	pHostParm->type = VBOX_HGCM_SVC_PARM_64BIT;
710	pHostParm->u.uint64 = pGuestParm->u.val.u64Value;
711
712	break;
713	}
714
715	case VMMDevHGCMParmType_PageList:
716	case VMMDevHGCMParmType_LinAddr_In:
717	case VMMDevHGCMParmType_LinAddr_Out:
718	case VMMDevHGCMParmType_LinAddr:
719	case VMMDevHGCMParmType_Embedded:
720	case VMMDevHGCMParmType_ContiguousPageList:
721	{
722	const uint32_t cbData = pGuestParm->u.ptr.cbData;
723
724	pHostParm->type = VBOX_HGCM_SVC_PARM_PTR;
725	pHostParm->u.pointer.size = cbData;
726
727	if (cbData)
728	{
729	/* Zero memory, the buffer content is potentially copied to the guest. */
730	void *pv = RTMemAllocZ(cbData);
731	AssertReturn(pv, VERR_NO_MEMORY);
732	pHostParm->u.pointer.addr = pv;
733
734	if (pGuestParm->u.ptr.fu32Direction & VBOX_HGCM_F_PARM_DIRECTION_TO_HOST)
735	{
736	if (pGuestParm->enmType != VMMDevHGCMParmType_Embedded)
737	{
738	if (pGuestParm->enmType != VMMDevHGCMParmType_ContiguousPageList)
739	{
740	int rc = vmmdevR3HgcmGuestBufferRead(pDevIns, pv, cbData, &pGuestParm->u.ptr);
741	ASSERT_GUEST_RETURN(RT_SUCCESS(rc), rc);
742	RT_UNTRUSTED_NONVOLATILE_COPY_FENCE();
743	}
744	else
745	{
746	int rc = PDMDevHlpPhysRead(pDevIns,
747	pGuestParm->u.ptr.paPages[0] \| pGuestParm->u.ptr.offFirstPage,
748	pv, cbData);
749	ASSERT_GUEST_RETURN(RT_SUCCESS(rc), rc);
750	RT_UNTRUSTED_NONVOLATILE_COPY_FENCE();
751	}
752	}
753	else
754	{
755	memcpy(pv, &pbReq[pGuestParm->u.ptr.offFirstPage], cbData);
756	RT_UNTRUSTED_NONVOLATILE_COPY_FENCE();
757	}
758	}
759	}
760	else
761	{
762	pHostParm->u.pointer.addr = NULL;
763	}
764
765	break;
766	}
767
768	case VMMDevHGCMParmType_NoBouncePageList:
769	{
770	pHostParm->type = VBOX_HGCM_SVC_PARM_PAGES;
771	pHostParm->u.Pages.cb = pGuestParm->u.Pages.cbData;
772	pHostParm->u.Pages.cPages = pGuestParm->u.Pages.cPages;
773	pHostParm->u.Pages.papvPages = (void **)&pGuestParm->u.Pages.paPgLocks[pGuestParm->u.Pages.cPages];
774
775	break;
776	}
777
778	default:
779	ASSERT_GUEST_FAILED_RETURN(VERR_INVALID_PARAMETER);
780	}
781	}
782
783	return VINF_SUCCESS;
784	}
785
786
787	/** Allocate and initialize VBOXHGCMCMD structure for a HGCMCall request.
788	*
789	* @returns VBox status code that the guest should see.
790	* @param pThisCC The VMMDev ring-3 instance data.
791	* @param pHGCMCall The HGCMCall request (cached in host memory).
792	* @param cbHGCMCall Size of the request.
793	* @param GCPhys Guest physical address of the request.
794	* @param enmRequestType The request type. Distinguishes 64 and 32 bit calls.
795	* @param ppCmd Where to store pointer to allocated command.
796	* @param pcbHGCMParmStruct Where to store size of used HGCM parameter structure.
797	*/
798	static int vmmdevR3HgcmCallAlloc(PVMMDEVCC pThisCC, const VMMDevHGCMCall *pHGCMCall, uint32_t cbHGCMCall, RTGCPHYS GCPhys,
799	VMMDevRequestType enmRequestType, PVBOXHGCMCMD ppCmd, uint32_t pcbHGCMParmStruct)
800	{
801	#ifdef VBOX_WITH_64_BITS_GUESTS
802	const uint32_t cbHGCMParmStruct = enmRequestType == VMMDevReq_HGCMCall64 ? sizeof(HGCMFunctionParameter64)
803	: sizeof(HGCMFunctionParameter32);
804	#else
805	const uint32_t cbHGCMParmStruct = sizeof(HGCMFunctionParameter);
806	#endif
807
808	const uint32_t cParms = pHGCMCall->cParms;
809
810	/* Whether there is enough space for parameters and sane upper limit. */
811	ASSERT_GUEST_STMT_RETURN( cParms <= (cbHGCMCall - sizeof(VMMDevHGCMCall)) / cbHGCMParmStruct
812	&& cParms <= VMMDEV_MAX_HGCM_PARMS,
813	LogRelMax(50, ("VMMDev: request packet with invalid number of HGCM parameters: %d vs %d. Refusing operation.\n",
814	(cbHGCMCall - sizeof(VMMDevHGCMCall)) / cbHGCMParmStruct, cParms)),
815	VERR_INVALID_PARAMETER);
816	RT_UNTRUSTED_VALIDATED_FENCE();
817
818	PVBOXHGCMCMD pCmd = vmmdevR3HgcmCmdAlloc(pThisCC, VBOXHGCMCMDTYPE_CALL, GCPhys, cbHGCMCall, cParms,
819	pHGCMCall->header.header.fRequestor);
820	if (pCmd == NULL)
821	return VERR_NO_MEMORY;
822
823	/* Request type has been validated in vmmdevReqDispatcher. */
824	pCmd->enmRequestType = enmRequestType;
825	pCmd->u.call.u32ClientID = pHGCMCall->u32ClientID;
826	pCmd->u.call.u32Function = pHGCMCall->u32Function;
827
828	*ppCmd = pCmd;
829	*pcbHGCMParmStruct = cbHGCMParmStruct;
830	return VINF_SUCCESS;
831	}
832
833	/** Copy VMMDevHGCMCall request data from the guest to VBOXHGCMCMD command.
834	*
835	* @returns VBox status code that the guest should see.
836	* @param pDevIns The device instance.
837	* @param pThisCC The VMMDev ring-3 instance data.
838	* @param pCmd The destination command.
839	* @param pHGCMCall The HGCMCall request (cached in host memory).
840	* @param cbHGCMCall Size of the request.
841	* @param enmRequestType The request type. Distinguishes 64 and 32 bit calls.
842	* @param cbHGCMParmStruct Size of used HGCM parameter structure.
843	*/
844	static int vmmdevR3HgcmCallFetchGuestParms(PPDMDEVINS pDevIns, PVMMDEVCC pThisCC, PVBOXHGCMCMD pCmd,
845	const VMMDevHGCMCall *pHGCMCall, uint32_t cbHGCMCall,
846	VMMDevRequestType enmRequestType, uint32_t cbHGCMParmStruct)
847	{
848	/*
849	* Go over all guest parameters and initialize relevant VBOXHGCMCMD fields.
850	* VBOXHGCMCMD must contain all information about the request,
851	* the request will be not read from the guest memory again.
852	*/
853	#ifdef VBOX_WITH_64_BITS_GUESTS
854	const bool f64Bits = (enmRequestType == VMMDevReq_HGCMCall64);
855	#endif
856
857	const uint32_t cParms = pCmd->u.call.cParms;
858
859	/* Offsets in the request buffer to HGCM parameters and additional data. */
860	const uint32_t offHGCMParms = sizeof(VMMDevHGCMCall);
861	const uint32_t offExtra = offHGCMParms + cParms * cbHGCMParmStruct;
862
863	/* Pointer to the next HGCM parameter of the request. */
864	const uint8_t pu8HGCMParm = (uint8_t )pHGCMCall + offHGCMParms;
865
866	uint32_t cbTotalData = 0;
867	for (uint32_t i = 0; i < cParms; ++i, pu8HGCMParm += cbHGCMParmStruct)
868	{
869	VBOXHGCMGUESTPARM * const pGuestParm = &pCmd->u.call.paGuestParms[i];
870
871	#ifdef VBOX_WITH_64_BITS_GUESTS
872	AssertCompileMembersSameSizeAndOffset(HGCMFunctionParameter64, type, HGCMFunctionParameter32, type);
873	pGuestParm->enmType = ((HGCMFunctionParameter64 *)pu8HGCMParm)->type;
874	#else
875	pGuestParm->enmType = ((HGCMFunctionParameter *)pu8HGCMParm)->type;
876	#endif
877
878	switch (pGuestParm->enmType)
879	{
880	case VMMDevHGCMParmType_32bit:
881	{
882	#ifdef VBOX_WITH_64_BITS_GUESTS
883	AssertCompileMembersSameSizeAndOffset(HGCMFunctionParameter64, u.value32, HGCMFunctionParameter32, u.value32);
884	uint32_t pu32 = &((HGCMFunctionParameter64 )pu8HGCMParm)->u.value32;
885	#else
886	uint32_t pu32 = &((HGCMFunctionParameter )pu8HGCMParm)->u.value32;
887	#endif
888	LogFunc(("uint32 guest parameter %RI32\n", *pu32));
889
890	pGuestParm->u.val.u64Value = *pu32;
891	pGuestParm->u.val.offValue = (uint32_t)((uintptr_t)pu32 - (uintptr_t)pHGCMCall);
892	pGuestParm->u.val.cbValue = sizeof(uint32_t);
893
894	break;
895	}
896
897	case VMMDevHGCMParmType_64bit:
898	{
899	#ifdef VBOX_WITH_64_BITS_GUESTS
900	AssertCompileMembersSameSizeAndOffset(HGCMFunctionParameter64, u.value64, HGCMFunctionParameter32, u.value64);
901	uint64_t pu64 = (uint64_t )(uintptr_t)&((HGCMFunctionParameter64 )pu8HGCMParm)->u.value64; / MSC detect misalignment, thus casts. */
902	#else
903	uint64_t pu64 = &((HGCMFunctionParameter )pu8HGCMParm)->u.value64;
904	#endif
905	LogFunc(("uint64 guest parameter %RI64\n", *pu64));
906
907	pGuestParm->u.val.u64Value = *pu64;
908	pGuestParm->u.val.offValue = (uint32_t)((uintptr_t)pu64 - (uintptr_t)pHGCMCall);
909	pGuestParm->u.val.cbValue = sizeof(uint64_t);
910
911	break;
912	}
913
914	case VMMDevHGCMParmType_LinAddr_In: /* In (read) */
915	case VMMDevHGCMParmType_LinAddr_Out: /* Out (write) */
916	case VMMDevHGCMParmType_LinAddr: /* In & Out */
917	{
918	#ifdef VBOX_WITH_64_BITS_GUESTS
919	uint32_t cbData = f64Bits ? ((HGCMFunctionParameter64 *)pu8HGCMParm)->u.Pointer.size
920	: ((HGCMFunctionParameter32 *)pu8HGCMParm)->u.Pointer.size;
921	RTGCPTR GCPtr = f64Bits ? ((HGCMFunctionParameter64 *)pu8HGCMParm)->u.Pointer.u.linearAddr
922	: ((HGCMFunctionParameter32 *)pu8HGCMParm)->u.Pointer.u.linearAddr;
923	#else
924	uint32_t cbData = ((HGCMFunctionParameter *)pu8HGCMParm)->u.Pointer.size;
925	RTGCPTR GCPtr = ((HGCMFunctionParameter *)pu8HGCMParm)->u.Pointer.u.linearAddr;
926	#endif
927	LogFunc(("LinAddr guest parameter %RGv, cb %u\n", GCPtr, cbData));
928
929	ASSERT_GUEST_RETURN(cbData <= VMMDEV_MAX_HGCM_DATA_SIZE - cbTotalData, VERR_INVALID_PARAMETER);
930	cbTotalData += cbData;
931
932	const uint32_t offFirstPage = cbData > 0 ? GCPtr & PAGE_OFFSET_MASK : 0;
933	const uint32_t cPages = cbData > 0 ? (offFirstPage + cbData + PAGE_SIZE - 1) / PAGE_SIZE : 0;
934
935	pGuestParm->u.ptr.cbData = cbData;
936	pGuestParm->u.ptr.offFirstPage = offFirstPage;
937	pGuestParm->u.ptr.cPages = cPages;
938	pGuestParm->u.ptr.fu32Direction = vmmdevR3HgcmParmTypeToDirection(pGuestParm->enmType);
939
940	if (cbData > 0)
941	{
942	if (cPages == 1)
943	pGuestParm->u.ptr.paPages = &pGuestParm->u.ptr.GCPhysSinglePage;
944	else
945	{
946	pGuestParm->u.ptr.paPages = (RTGCPHYS )RTMemAlloc(cPages sizeof(RTGCPHYS));
947	AssertReturn(pGuestParm->u.ptr.paPages, VERR_NO_MEMORY);
948	}
949
950	/* Gonvert the guest linear pointers of pages to physical addresses. */
951	GCPtr &= PAGE_BASE_GC_MASK;
952	for (uint32_t iPage = 0; iPage < cPages; ++iPage)
953	{
954	/* The guest might specify invalid GCPtr, just skip such addresses.
955	* Also if the guest parameters are fetched when restoring an old saved state,
956	* then GCPtr may become invalid and do not have a corresponding GCPhys.
957	* The command restoration routine will take care of this.
958	*/
959	RTGCPHYS GCPhys;
960	int rc2 = PDMDevHlpPhysGCPtr2GCPhys(pDevIns, GCPtr, &GCPhys);
961	if (RT_FAILURE(rc2))
962	GCPhys = NIL_RTGCPHYS;
963	LogFunc(("Page %d: %RGv -> %RGp. %Rrc\n", iPage, GCPtr, GCPhys, rc2));
964
965	pGuestParm->u.ptr.paPages[iPage] = GCPhys;
966	GCPtr += PAGE_SIZE;
967	}
968	}
969
970	break;
971	}
972
973	case VMMDevHGCMParmType_PageList:
974	case VMMDevHGCMParmType_ContiguousPageList:
975	case VMMDevHGCMParmType_NoBouncePageList:
976	{
977	#ifdef VBOX_WITH_64_BITS_GUESTS
978	AssertCompileMembersSameSizeAndOffset(HGCMFunctionParameter64, u.PageList.size, HGCMFunctionParameter32, u.PageList.size);
979	AssertCompileMembersSameSizeAndOffset(HGCMFunctionParameter64, u.PageList.offset, HGCMFunctionParameter32, u.PageList.offset);
980	uint32_t cbData = ((HGCMFunctionParameter64 *)pu8HGCMParm)->u.PageList.size;
981	uint32_t offPageListInfo = ((HGCMFunctionParameter64 *)pu8HGCMParm)->u.PageList.offset;
982	#else
983	uint32_t cbData = ((HGCMFunctionParameter *)pu8HGCMParm)->u.PageList.size;
984	uint32_t offPageListInfo = ((HGCMFunctionParameter *)pu8HGCMParm)->u.PageList.offset;
985	#endif
986	LogFunc(("PageList guest parameter cb %u, offset %u\n", cbData, offPageListInfo));
987
988	ASSERT_GUEST_RETURN(cbData <= VMMDEV_MAX_HGCM_DATA_SIZE - cbTotalData, VERR_INVALID_PARAMETER);
989	cbTotalData += cbData;
990
991	/** @todo respect zero byte page lists... */
992	/* Check that the page list info is within the request. */
993	ASSERT_GUEST_RETURN( offPageListInfo >= offExtra
994	&& cbHGCMCall >= sizeof(HGCMPageListInfo)
995	&& offPageListInfo <= cbHGCMCall - sizeof(HGCMPageListInfo),
996	VERR_INVALID_PARAMETER);
997	RT_UNTRUSTED_VALIDATED_FENCE();
998
999	/* The HGCMPageListInfo structure is within the request. */
1000	const HGCMPageListInfo pPageListInfo = (HGCMPageListInfo )((uint8_t *)pHGCMCall + offPageListInfo);
1001
1002	/* Enough space for page pointers? */
1003	const uint32_t cMaxPages = 1 + (cbHGCMCall - offPageListInfo - sizeof(HGCMPageListInfo)) / sizeof(RTGCPHYS);
1004	ASSERT_GUEST_RETURN( pPageListInfo->cPages > 0
1005	&& pPageListInfo->cPages <= cMaxPages,
1006	VERR_INVALID_PARAMETER);
1007
1008	/* Flags. */
1009	ASSERT_GUEST_MSG_RETURN(VBOX_HGCM_F_PARM_ARE_VALID(pPageListInfo->flags),
1010	("%#x\n", pPageListInfo->flags), VERR_INVALID_FLAGS);
1011	/* First page offset. */
1012	ASSERT_GUEST_MSG_RETURN(pPageListInfo->offFirstPage < PAGE_SIZE,
1013	("%#x\n", pPageListInfo->offFirstPage), VERR_INVALID_PARAMETER);
1014
1015	/* Contiguous page lists only ever have a single page and
1016	no-bounce page list requires cPages to match the size exactly.
1017	Plain page list does not impose any restrictions on cPages currently. */
1018	ASSERT_GUEST_MSG_RETURN( pPageListInfo->cPages
1019	== (pGuestParm->enmType == VMMDevHGCMParmType_ContiguousPageList ? 1
1020	: RT_ALIGN_32(pPageListInfo->offFirstPage + cbData, PAGE_SIZE) >> PAGE_SHIFT)
1021	\|\| pGuestParm->enmType == VMMDevHGCMParmType_PageList,
1022	("offFirstPage=%#x cbData=%#x cPages=%#x enmType=%d\n",
1023	pPageListInfo->offFirstPage, cbData, pPageListInfo->cPages, pGuestParm->enmType),
1024	VERR_INVALID_PARAMETER);
1025
1026	RT_UNTRUSTED_VALIDATED_FENCE();
1027
1028	/*
1029	* Deal with no-bounce buffers first, as
1030	* VMMDevHGCMParmType_PageList is the fallback.
1031	*/
1032	if (pGuestParm->enmType == VMMDevHGCMParmType_NoBouncePageList)
1033	{
1034	/* Validate page offsets */
1035	ASSERT_GUEST_MSG_RETURN( !(pPageListInfo->aPages[0] & PAGE_OFFSET_MASK)
1036	\|\| (pPageListInfo->aPages[0] & PAGE_OFFSET_MASK) == pPageListInfo->offFirstPage,
1037	("%#RX64 offFirstPage=%#x\n", pPageListInfo->aPages[0], pPageListInfo->offFirstPage),
1038	VERR_INVALID_POINTER);
1039	uint32_t const cPages = pPageListInfo->cPages;
1040	for (uint32_t iPage = 1; iPage < cPages; iPage++)
1041	ASSERT_GUEST_MSG_RETURN(!(pPageListInfo->aPages[iPage] & PAGE_OFFSET_MASK),
1042	("[%#zx]=%#RX64\n", iPage, pPageListInfo->aPages[iPage]), VERR_INVALID_POINTER);
1043	RT_UNTRUSTED_VALIDATED_FENCE();
1044
1045	pGuestParm->u.Pages.cbData = cbData;
1046	pGuestParm->u.Pages.offFirstPage = pPageListInfo->offFirstPage;
1047	pGuestParm->u.Pages.fFlags = pPageListInfo->flags;
1048	pGuestParm->u.Pages.cPages = (uint16_t)cPages;
1049	pGuestParm->u.Pages.fLocked = false;
1050	pGuestParm->u.Pages.paPgLocks = (PPGMPAGEMAPLOCK)RTMemAllocZ( (sizeof(PGMPAGEMAPLOCK) + sizeof(void *))
1051	* cPages);
1052	AssertReturn(pGuestParm->u.Pages.paPgLocks, VERR_NO_MEMORY);
1053
1054	/* Make sure the page offsets are sensible. */
1055	int rc = VINF_SUCCESS;
1056	void papvPages = (void )&pGuestParm->u.Pages.paPgLocks[cPages];
1057	if (pPageListInfo->flags & VBOX_HGCM_F_PARM_DIRECTION_FROM_HOST)
1058	rc = PDMDevHlpPhysBulkGCPhys2CCPtr(pDevIns, cPages, pPageListInfo->aPages, 0 /fFlags/,
1059	papvPages, pGuestParm->u.Pages.paPgLocks);
1060	else
1061	rc = PDMDevHlpPhysBulkGCPhys2CCPtrReadOnly(pDevIns, cPages, pPageListInfo->aPages, 0 /fFlags/,
1062	(void const **)papvPages, pGuestParm->u.Pages.paPgLocks);
1063	if (RT_SUCCESS(rc))
1064	{
1065	papvPages[0] = (void *)((uintptr_t)papvPages[0] \| pPageListInfo->offFirstPage);
1066	pGuestParm->u.Pages.fLocked = true;
1067	break;
1068	}
1069
1070	/* Locking failed, bail out. In case of MMIO we fall back on regular page list handling. */
1071	RTMemFree(pGuestParm->u.Pages.paPgLocks);
1072	pGuestParm->u.Pages.paPgLocks = NULL;
1073	STAM_REL_COUNTER_INC(&pThisCC->StatHgcmFailedPageListLocking);
1074	ASSERT_GUEST_MSG_RETURN(rc == VERR_PGM_PHYS_PAGE_RESERVED, ("cPages=%u %Rrc\n", cPages, rc), rc);
1075	pGuestParm->enmType = VMMDevHGCMParmType_PageList;
1076	}
1077
1078	/*
1079	* Regular page list or contiguous page list.
1080	*/
1081	pGuestParm->u.ptr.cbData = cbData;
1082	pGuestParm->u.ptr.offFirstPage = pPageListInfo->offFirstPage;
1083	pGuestParm->u.ptr.cPages = pPageListInfo->cPages;
1084	pGuestParm->u.ptr.fu32Direction = pPageListInfo->flags;
1085	if (pPageListInfo->cPages == 1)
1086	{
1087	pGuestParm->u.ptr.paPages = &pGuestParm->u.ptr.GCPhysSinglePage;
1088	pGuestParm->u.ptr.GCPhysSinglePage = pPageListInfo->aPages[0];
1089	}
1090	else
1091	{
1092	pGuestParm->u.ptr.paPages = (RTGCPHYS )RTMemAlloc(pPageListInfo->cPages sizeof(RTGCPHYS));
1093	AssertReturn(pGuestParm->u.ptr.paPages, VERR_NO_MEMORY);
1094
1095	for (uint32_t iPage = 0; iPage < pGuestParm->u.ptr.cPages; ++iPage)
1096	pGuestParm->u.ptr.paPages[iPage] = pPageListInfo->aPages[iPage];
1097	}
1098	break;
1099	}
1100
1101	case VMMDevHGCMParmType_Embedded:
1102	{
1103	#ifdef VBOX_WITH_64_BITS_GUESTS
1104	AssertCompileMembersSameSizeAndOffset(HGCMFunctionParameter64, u.Embedded.cbData, HGCMFunctionParameter32, u.Embedded.cbData);
1105	uint32_t const cbData = ((HGCMFunctionParameter64 *)pu8HGCMParm)->u.Embedded.cbData;
1106	uint32_t const offData = ((HGCMFunctionParameter64 *)pu8HGCMParm)->u.Embedded.offData;
1107	uint32_t const fFlags = ((HGCMFunctionParameter64 *)pu8HGCMParm)->u.Embedded.fFlags;
1108	#else
1109	uint32_t const cbData = ((HGCMFunctionParameter *)pu8HGCMParm)->u.Embedded.cbData;
1110	uint32_t const offData = ((HGCMFunctionParameter *)pu8HGCMParm)->u.Embedded.offData;
1111	uint32_t const fFlags = ((HGCMFunctionParameter *)pu8HGCMParm)->u.Embedded.fFlags;
1112	#endif
1113	LogFunc(("Embedded guest parameter cb %u, offset %u, flags %#x\n", cbData, offData, fFlags));
1114
1115	ASSERT_GUEST_RETURN(cbData <= VMMDEV_MAX_HGCM_DATA_SIZE - cbTotalData, VERR_INVALID_PARAMETER);
1116	cbTotalData += cbData;
1117
1118	/* Check flags and buffer range. */
1119	ASSERT_GUEST_MSG_RETURN(VBOX_HGCM_F_PARM_ARE_VALID(fFlags), ("%#x\n", fFlags), VERR_INVALID_FLAGS);
1120	ASSERT_GUEST_MSG_RETURN( offData >= offExtra
1121	&& offData <= cbHGCMCall
1122	&& cbData <= cbHGCMCall - offData,
1123	("offData=%#x cbData=%#x cbHGCMCall=%#x offExtra=%#x\n", offData, cbData, cbHGCMCall, offExtra),
1124	VERR_INVALID_PARAMETER);
1125	RT_UNTRUSTED_VALIDATED_FENCE();
1126
1127	/* We use part of the ptr member. */
1128	pGuestParm->u.ptr.fu32Direction = fFlags;
1129	pGuestParm->u.ptr.cbData = cbData;
1130	pGuestParm->u.ptr.offFirstPage = offData;
1131	pGuestParm->u.ptr.GCPhysSinglePage = pCmd->GCPhys + offData;
1132	pGuestParm->u.ptr.cPages = 1;
1133	pGuestParm->u.ptr.paPages = &pGuestParm->u.ptr.GCPhysSinglePage;
1134	break;
1135	}
1136
1137	default:
1138	ASSERT_GUEST_FAILED_RETURN(VERR_INVALID_PARAMETER);
1139	}
1140	}
1141
1142	return VINF_SUCCESS;
1143	}
1144
1145	/**
1146	* Handles VMMDevHGCMCall request.
1147	*
1148	* @returns VBox status code that the guest should see.
1149	* @param pDevIns The device instance.
1150	* @param pThis The VMMDev shared instance data.
1151	* @param pThisCC The VMMDev ring-3 instance data.
1152	* @param pHGCMCall The request to handle (cached in host memory).
1153	* @param cbHGCMCall Size of the entire request (including HGCM parameters).
1154	* @param GCPhys The guest physical address of the request.
1155	* @param enmRequestType The request type. Distinguishes 64 and 32 bit calls.
1156	* @param tsArrival The STAM_GET_TS() value when the request arrived.
1157	* @param ppLock Pointer to the lock info pointer (latter can be
1158	* NULL). Set to NULL if HGCM takes lock ownership.
1159	*/
1160	int vmmdevR3HgcmCall(PPDMDEVINS pDevIns, PVMMDEV pThis, PVMMDEVCC pThisCC, const VMMDevHGCMCall *pHGCMCall, uint32_t cbHGCMCall,
1161	RTGCPHYS GCPhys, VMMDevRequestType enmRequestType, uint64_t tsArrival, PVMMDEVREQLOCK *ppLock)
1162	{
1163	LogFunc(("client id = %d, function = %d, cParms = %d, enmRequestType = %d, fRequestor = %#x\n", pHGCMCall->u32ClientID,
1164	pHGCMCall->u32Function, pHGCMCall->cParms, enmRequestType, pHGCMCall->header.header.fRequestor));
1165
1166	/*
1167	* Validation.
1168	*/
1169	ASSERT_GUEST_RETURN(cbHGCMCall >= sizeof(VMMDevHGCMCall), VERR_INVALID_PARAMETER);
1170	#ifdef VBOX_WITH_64_BITS_GUESTS
1171	ASSERT_GUEST_RETURN( enmRequestType == VMMDevReq_HGCMCall32
1172	\|\| enmRequestType == VMMDevReq_HGCMCall64, VERR_INVALID_PARAMETER);
1173	#else
1174	ASSERT_GUEST_RETURN(enmRequestType == VMMDevReq_HGCMCall32, VERR_INVALID_PARAMETER);
1175	#endif
1176	RT_UNTRUSTED_VALIDATED_FENCE();
1177
1178	/*
1179	* Create a command structure.
1180	*/
1181	PVBOXHGCMCMD pCmd;
1182	uint32_t cbHGCMParmStruct;
1183	int rc = vmmdevR3HgcmCallAlloc(pThisCC, pHGCMCall, cbHGCMCall, GCPhys, enmRequestType, &pCmd, &cbHGCMParmStruct);
1184	if (RT_SUCCESS(rc))
1185	{
1186	pCmd->tsArrival = tsArrival;
1187	PVMMDEVREQLOCK pLock = *ppLock;
1188	if (pLock)
1189	{
1190	pCmd->ReqMapLock = pLock->Lock;
1191	pCmd->pvReqLocked = pLock->pvReq;
1192	*ppLock = NULL;
1193	}
1194
1195	rc = vmmdevR3HgcmCallFetchGuestParms(pDevIns, pThisCC, pCmd, pHGCMCall, cbHGCMCall, enmRequestType, cbHGCMParmStruct);
1196	if (RT_SUCCESS(rc))
1197	{
1198	/* Copy guest data to host parameters, so HGCM services can use the data. */
1199	rc = vmmdevR3HgcmInitHostParameters(pDevIns, pCmd, (uint8_t const *)pHGCMCall);
1200	if (RT_SUCCESS(rc))
1201	{
1202	/*
1203	* Pass the function call to HGCM connector for actual processing
1204	*/
1205	vmmdevR3HgcmAddCommand(pDevIns, pThis, pThisCC, pCmd);
1206
1207	#if 0 /* DONT ENABLE - for performance hacking. */
1208	if ( pCmd->u.call.u32Function == 9
1209	&& pCmd->u.call.cParms == 5)
1210	{
1211	vmmdevR3HgcmRemoveCommand(pThisCC, pCmd);
1212
1213	if (pCmd->pvReqLocked)
1214	{
1215	VMMDevHGCMRequestHeader volatile pHeader = (VMMDevHGCMRequestHeader volatile )pCmd->pvReqLocked;
1216	pHeader->header.rc = VINF_SUCCESS;
1217	pHeader->result = VINF_SUCCESS;
1218	pHeader->fu32Flags \|= VBOX_HGCM_REQ_DONE;
1219	}
1220	else
1221	{
1222	VMMDevHGCMRequestHeader pHeader = (VMMDevHGCMRequestHeader )pHGCMCall;
1223	pHeader->header.rc = VINF_SUCCESS;
1224	pHeader->result = VINF_SUCCESS;
1225	pHeader->fu32Flags \|= VBOX_HGCM_REQ_DONE;
1226	PDMDevHlpPhysWrite(pDevIns, GCPhys, pHeader, sizeof(*pHeader));
1227	}
1228	vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd);
1229	return VINF_HGCM_ASYNC_EXECUTE; /* ignored, but avoids assertions. */
1230	}
1231	#endif
1232
1233	rc = pThisCC->pHGCMDrv->pfnCall(pThisCC->pHGCMDrv, pCmd,
1234	pCmd->u.call.u32ClientID, pCmd->u.call.u32Function,
1235	pCmd->u.call.cParms, pCmd->u.call.paHostParms, tsArrival);
1236
1237	if (rc == VINF_HGCM_ASYNC_EXECUTE)
1238	{
1239	/*
1240	* Done. Just update statistics and return.
1241	*/
1242	#ifndef VBOX_WITHOUT_RELEASE_STATISTICS
1243	uint64_t tsNow;
1244	STAM_GET_TS(tsNow);
1245	STAM_REL_PROFILE_ADD_PERIOD(&pThisCC->StatHgcmCmdArrival, tsNow - tsArrival);
1246	#endif
1247	return rc;
1248	}
1249
1250	/*
1251	* Failed, bail out.
1252	*/
1253	LogFunc(("pfnCall rc = %Rrc\n", rc));
1254	vmmdevR3HgcmRemoveCommand(pThisCC, pCmd);
1255	}
1256	}
1257	vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd);
1258	}
1259	return rc;
1260	}
1261
1262	/**
1263	* VMMDevReq_HGCMCancel worker.
1264	*
1265	* @returns VBox status code that the guest should see.
1266	* @param pThisCC The VMMDev ring-3 instance data.
1267	* @param pHGCMCancel The request to handle (cached in host memory).
1268	* @param GCPhys The address of the request.
1269	*
1270	* @thread EMT
1271	*/
1272	int vmmdevR3HgcmCancel(PVMMDEVCC pThisCC, const VMMDevHGCMCancel *pHGCMCancel, RTGCPHYS GCPhys)
1273	{
1274	NOREF(pHGCMCancel);
1275	int rc = vmmdevR3HgcmCancel2(pThisCC, GCPhys);
1276	return rc == VERR_NOT_FOUND ? VERR_INVALID_PARAMETER : rc;
1277	}
1278
1279	/**
1280	* VMMDevReq_HGCMCancel2 worker.
1281	*
1282	* @retval VINF_SUCCESS on success.
1283	* @retval VERR_NOT_FOUND if the request was not found.
1284	* @retval VERR_INVALID_PARAMETER if the request address is invalid.
1285	*
1286	* @param pThisCC The VMMDev ring-3 instance data.
1287	* @param GCPhys The address of the request that should be cancelled.
1288	*
1289	* @thread EMT
1290	*/
1291	int vmmdevR3HgcmCancel2(PVMMDEVCC pThisCC, RTGCPHYS GCPhys)
1292	{
1293	if ( GCPhys == 0
1294	\|\| GCPhys == NIL_RTGCPHYS
1295	\|\| GCPhys == NIL_RTGCPHYS32)
1296	{
1297	Log(("vmmdevR3HgcmCancel2: GCPhys=%#x\n", GCPhys));
1298	return VERR_INVALID_PARAMETER;
1299	}
1300
1301	/*
1302	* Locate the command and cancel it while under the protection of
1303	* the lock. hgcmCompletedWorker makes assumptions about this.
1304	*/
1305	int rc = vmmdevR3HgcmCmdListLock(pThisCC);
1306	AssertRCReturn(rc, rc);
1307
1308	PVBOXHGCMCMD pCmd = vmmdevR3HgcmFindCommandLocked(pThisCC, GCPhys);
1309	if (pCmd)
1310	{
1311	pCmd->fCancelled = true;
1312
1313	Log(("vmmdevR3HgcmCancel2: Cancelled pCmd=%p / GCPhys=%#x\n", pCmd, GCPhys));
1314	if (pThisCC->pHGCMDrv)
1315	pThisCC->pHGCMDrv->pfnCancelled(pThisCC->pHGCMDrv, pCmd,
1316	pCmd->enmCmdType == VBOXHGCMCMDTYPE_CALL ? pCmd->u.call.u32ClientID
1317	: pCmd->enmCmdType == VBOXHGCMCMDTYPE_CONNECT ? pCmd->u.connect.u32ClientID
1318	: pCmd->enmCmdType == VBOXHGCMCMDTYPE_DISCONNECT ? pCmd->u.disconnect.u32ClientID
1319	: 0);
1320	}
1321	else
1322	rc = VERR_NOT_FOUND;
1323
1324	vmmdevR3HgcmCmdListUnlock(pThisCC);
1325	return rc;
1326	}
1327
1328	/** Write HGCM call parameters and buffers back to the guest request and memory.
1329	*
1330	* @returns VBox status code that the guest should see.
1331	* @param pDevIns The device instance.
1332	* @param pCmd Completed call command.
1333	* @param pHGCMCall The guestrequest which needs updating (cached in the host memory).
1334	* @param pbReq The request copy or locked memory for handling
1335	* embedded buffers.
1336	*/
1337	static int vmmdevR3HgcmCompleteCallRequest(PPDMDEVINS pDevIns, PVBOXHGCMCMD pCmd, VMMDevHGCMCall pHGCMCall, uint8_t pbReq)
1338	{
1339	AssertReturn(pCmd->enmCmdType == VBOXHGCMCMDTYPE_CALL, VERR_INTERNAL_ERROR);
1340
1341	/*
1342	* Go over parameter descriptions saved in pCmd.
1343	*/
1344	#ifdef VBOX_WITH_64_BITS_GUESTS
1345	HGCMFunctionParameter64 pReqParm = (HGCMFunctionParameter64 )(pbReq + sizeof(VMMDevHGCMCall));
1346	size_t const cbHGCMParmStruct = pCmd->enmRequestType == VMMDevReq_HGCMCall64
1347	? sizeof(HGCMFunctionParameter64) : sizeof(HGCMFunctionParameter32);
1348	#else
1349	HGCMFunctionParameter pReqParm = (HGCMFunctionParameter )(pbReq + sizeof(VMMDevHGCMCall));
1350	size_t const cbHGCMParmStruct = sizeof(HGCMFunctionParameter);
1351	#endif
1352	for (uint32_t i = 0;
1353	i < pCmd->u.call.cParms;
1354	#ifdef VBOX_WITH_64_BITS_GUESTS
1355	++i, pReqParm = (HGCMFunctionParameter64 )((uint8_t )pReqParm + cbHGCMParmStruct)
1356	#else
1357	++i, pReqParm = (HGCMFunctionParameter )((uint8_t )pReqParm + cbHGCMParmStruct)
1358	#endif
1359	)
1360	{
1361	VBOXHGCMGUESTPARM * const pGuestParm = &pCmd->u.call.paGuestParms[i];
1362	VBOXHGCMSVCPARM * const pHostParm = &pCmd->u.call.paHostParms[i];
1363
1364	const HGCMFunctionParameterType enmType = pGuestParm->enmType;
1365	switch (enmType)
1366	{
1367	case VMMDevHGCMParmType_32bit:
1368	case VMMDevHGCMParmType_64bit:
1369	{
1370	const VBOXHGCMPARMVAL * const pVal = &pGuestParm->u.val;
1371	const void pvSrc = enmType == VMMDevHGCMParmType_32bit ? (void )&pHostParm->u.uint32
1372	: (void *)&pHostParm->u.uint64;
1373	/** @todo optimize memcpy away here. */
1374	memcpy((uint8_t *)pHGCMCall + pVal->offValue, pvSrc, pVal->cbValue);
1375	break;
1376	}
1377
1378	case VMMDevHGCMParmType_LinAddr_In:
1379	case VMMDevHGCMParmType_LinAddr_Out:
1380	case VMMDevHGCMParmType_LinAddr:
1381	case VMMDevHGCMParmType_PageList:
1382	{
1383	/** @todo Update the return buffer size? */
1384	const VBOXHGCMPARMPTR * const pPtr = &pGuestParm->u.ptr;
1385	if ( pPtr->cbData > 0
1386	&& (pPtr->fu32Direction & VBOX_HGCM_F_PARM_DIRECTION_FROM_HOST))
1387	{
1388	const void *pvSrc = pHostParm->u.pointer.addr;
1389	uint32_t cbSrc = pHostParm->u.pointer.size;
1390	int rc = vmmdevR3HgcmGuestBufferWrite(pDevIns, pPtr, pvSrc, cbSrc);
1391	if (RT_FAILURE(rc))
1392	break;
1393	}
1394	break;
1395	}
1396
1397	case VMMDevHGCMParmType_Embedded:
1398	{
1399	const VBOXHGCMPARMPTR * const pPtr = &pGuestParm->u.ptr;
1400
1401	/* Update size. */
1402	#ifdef VBOX_WITH_64_BITS_GUESTS
1403	AssertCompileMembersSameSizeAndOffset(HGCMFunctionParameter64, u.Embedded.cbData, HGCMFunctionParameter32, u.Embedded.cbData);
1404	#endif
1405	pReqParm->u.Embedded.cbData = pHostParm->u.pointer.size;
1406
1407	/* Copy out data. */
1408	if ( pPtr->cbData > 0
1409	&& (pPtr->fu32Direction & VBOX_HGCM_F_PARM_DIRECTION_FROM_HOST))
1410	{
1411	const void *pvSrc = pHostParm->u.pointer.addr;
1412	uint32_t cbSrc = pHostParm->u.pointer.size;
1413	uint32_t cbToCopy = RT_MIN(cbSrc, pPtr->cbData);
1414	memcpy(pbReq + pPtr->offFirstPage, pvSrc, cbToCopy);
1415	}
1416	break;
1417	}
1418
1419	case VMMDevHGCMParmType_ContiguousPageList:
1420	{
1421	const VBOXHGCMPARMPTR * const pPtr = &pGuestParm->u.ptr;
1422
1423	/* Update size. */
1424	#ifdef VBOX_WITH_64_BITS_GUESTS
1425	AssertCompileMembersSameSizeAndOffset(HGCMFunctionParameter64, u.PageList.size, HGCMFunctionParameter32, u.PageList.size);
1426	#endif
1427	pReqParm->u.PageList.size = pHostParm->u.pointer.size;
1428
1429	/* Copy out data. */
1430	if ( pPtr->cbData > 0
1431	&& (pPtr->fu32Direction & VBOX_HGCM_F_PARM_DIRECTION_FROM_HOST))
1432	{
1433	const void *pvSrc = pHostParm->u.pointer.addr;
1434	uint32_t cbSrc = pHostParm->u.pointer.size;
1435	uint32_t cbToCopy = RT_MIN(cbSrc, pPtr->cbData);
1436	int rc = PDMDevHlpPhysWrite(pDevIns, pGuestParm->u.ptr.paPages[0] \| pGuestParm->u.ptr.offFirstPage,
1437	pvSrc, cbToCopy);
1438	if (RT_FAILURE(rc))
1439	break;
1440	}
1441	break;
1442	}
1443
1444	case VMMDevHGCMParmType_NoBouncePageList:
1445	{
1446	/* Update size. */
1447	#ifdef VBOX_WITH_64_BITS_GUESTS
1448	AssertCompileMembersSameSizeAndOffset(HGCMFunctionParameter64, u.PageList.size, HGCMFunctionParameter32, u.PageList.size);
1449	#endif
1450	pReqParm->u.PageList.size = pHostParm->u.Pages.cb;
1451
1452	/* unlock early. */
1453	if (pGuestParm->u.Pages.fLocked)
1454	{
1455	PDMDevHlpPhysBulkReleasePageMappingLocks(pDevIns, pGuestParm->u.Pages.cPages,
1456	pGuestParm->u.Pages.paPgLocks);
1457	pGuestParm->u.Pages.fLocked = false;
1458	}
1459	break;
1460	}
1461
1462	default:
1463	break;
1464	}
1465	}
1466
1467	return VINF_SUCCESS;
1468	}
1469
1470	/** Update HGCM request in the guest memory and mark it as completed.
1471	*
1472	* @returns VINF_SUCCESS or VERR_CANCELLED.
1473	* @param pInterface Pointer to this PDM interface.
1474	* @param result HGCM completion status code (VBox status code).
1475	* @param pCmd Completed command, which contains updated host parameters.
1476	*
1477	* @thread EMT
1478	*/
1479	static int hgcmCompletedWorker(PPDMIHGCMPORT pInterface, int32_t result, PVBOXHGCMCMD pCmd)
1480	{
1481	PVMMDEVCC pThisCC = RT_FROM_MEMBER(pInterface, VMMDEVCC, IHGCMPort);
1482	PPDMDEVINS pDevIns = pThisCC->pDevIns;
1483	PVMMDEV pThis = PDMDEVINS_2_DATA(pDevIns, PVMMDEV);
1484	#ifdef VBOX_WITH_DTRACE
1485	uint32_t idFunction = 0;
1486	uint32_t idClient = 0;
1487	#endif
1488
1489	if (result == VINF_HGCM_SAVE_STATE)
1490	{
1491	/* If the completion routine was called while the HGCM service saves its state,
1492	* then currently nothing to be done here. The pCmd stays in the list and will
1493	* be saved later when the VMMDev state will be saved and re-submitted on load.
1494	*
1495	* It it assumed that VMMDev saves state after the HGCM services (VMMDev driver
1496	* attached by constructor before it registers its SSM state), and, therefore,
1497	* VBOXHGCMCMD structures are not removed by vmmdevR3HgcmSaveState from the list,
1498	* while HGCM uses them.
1499	*/
1500	LogFlowFunc(("VINF_HGCM_SAVE_STATE for command %p\n", pCmd));
1501	return VINF_SUCCESS;
1502	}
1503
1504	VBOXDD_HGCMCALL_COMPLETED_EMT(pCmd, result);
1505
1506	int rc = VINF_SUCCESS;
1507
1508	/*
1509	* The cancellation protocol requires us to remove the command here
1510	* and then check the flag. Cancelled commands must not be written
1511	* back to guest memory.
1512	*/
1513	vmmdevR3HgcmRemoveCommand(pThisCC, pCmd);
1514
1515	if (RT_LIKELY(!pCmd->fCancelled))
1516	{
1517	if (!pCmd->pvReqLocked)
1518	{
1519	/*
1520	* Request is not locked:
1521	*/
1522	VMMDevHGCMRequestHeader pHeader = (VMMDevHGCMRequestHeader )RTMemAlloc(pCmd->cbRequest);
1523	if (pHeader)
1524	{
1525	/*
1526	* Read the request from the guest memory for updating.
1527	* The request data is not be used for anything but checking the request type.
1528	*/
1529	PDMDevHlpPhysRead(pDevIns, pCmd->GCPhys, pHeader, pCmd->cbRequest);
1530	RT_UNTRUSTED_NONVOLATILE_COPY_FENCE();
1531
1532	/* Verify the request type. This is the only field which is used from the guest memory. */
1533	const VMMDevRequestType enmRequestType = pHeader->header.requestType;
1534	if ( enmRequestType == pCmd->enmRequestType
1535	\|\| enmRequestType == VMMDevReq_HGCMCancel)
1536	{
1537	RT_UNTRUSTED_VALIDATED_FENCE();
1538
1539	/*
1540	* Update parameters and data buffers.
1541	*/
1542	switch (enmRequestType)
1543	{
1544	#ifdef VBOX_WITH_64_BITS_GUESTS
1545	case VMMDevReq_HGCMCall64:
1546	#endif
1547	case VMMDevReq_HGCMCall32:
1548	{
1549	VMMDevHGCMCall pHGCMCall = (VMMDevHGCMCall )pHeader;
1550	rc = vmmdevR3HgcmCompleteCallRequest(pDevIns, pCmd, pHGCMCall, (uint8_t *)pHeader);
1551	#ifdef VBOX_WITH_DTRACE
1552	idFunction = pCmd->u.call.u32Function;
1553	idClient = pCmd->u.call.u32ClientID;
1554	#endif
1555	break;
1556	}
1557
1558	case VMMDevReq_HGCMConnect:
1559	{
1560	/* save the client id in the guest request packet */
1561	VMMDevHGCMConnect pHGCMConnect = (VMMDevHGCMConnect )pHeader;
1562	pHGCMConnect->u32ClientID = pCmd->u.connect.u32ClientID;
1563	break;
1564	}
1565
1566	default:
1567	/* make compiler happy */
1568	break;
1569	}
1570	}
1571	else
1572	{
1573	/* Guest has changed the command type. */
1574	LogRelMax(50, ("VMMDEV: Invalid HGCM command: pCmd->enmCmdType = 0x%08X, pHeader->header.requestType = 0x%08X\n",
1575	pCmd->enmCmdType, pHeader->header.requestType));
1576
1577	ASSERT_GUEST_FAILED_STMT(rc = VERR_INVALID_PARAMETER);
1578	}
1579
1580	/* Setup return code for the guest. */
1581	if (RT_SUCCESS(rc))
1582	pHeader->result = result;
1583	else
1584	pHeader->result = rc;
1585
1586	/* First write back the request. */
1587	PDMDevHlpPhysWrite(pDevIns, pCmd->GCPhys, pHeader, pCmd->cbRequest);
1588
1589	/* Mark request as processed. */
1590	pHeader->fu32Flags \|= VBOX_HGCM_REQ_DONE;
1591
1592	/* Second write the flags to mark the request as processed. */
1593	PDMDevHlpPhysWrite(pDevIns, pCmd->GCPhys + RT_UOFFSETOF(VMMDevHGCMRequestHeader, fu32Flags),
1594	&pHeader->fu32Flags, sizeof(pHeader->fu32Flags));
1595
1596	/* Now, when the command was removed from the internal list, notify the guest. */
1597	VMMDevNotifyGuest(pDevIns, pThis, pThisCC, VMMDEV_EVENT_HGCM);
1598
1599	RTMemFreeZ(pHeader, pCmd->cbRequest);
1600	}
1601	else
1602	{
1603	LogRelMax(10, ("VMMDev: Failed to allocate %u bytes for HGCM request completion!!!\n", pCmd->cbRequest));
1604	}
1605	}
1606	/*
1607	* Request was locked:
1608	*/
1609	else
1610	{
1611	VMMDevHGCMRequestHeader volatile pHeader = (VMMDevHGCMRequestHeader volatile )pCmd->pvReqLocked;
1612
1613	/* Verify the request type. This is the only field which is used from the guest memory. */
1614	const VMMDevRequestType enmRequestType = pHeader->header.requestType;
1615	if ( enmRequestType == pCmd->enmRequestType
1616	\|\| enmRequestType == VMMDevReq_HGCMCancel)
1617	{
1618	RT_UNTRUSTED_VALIDATED_FENCE();
1619
1620	/*
1621	* Update parameters and data buffers.
1622	*/
1623	switch (enmRequestType)
1624	{
1625	#ifdef VBOX_WITH_64_BITS_GUESTS
1626	case VMMDevReq_HGCMCall64:
1627	#endif
1628	case VMMDevReq_HGCMCall32:
1629	{
1630	VMMDevHGCMCall pHGCMCall = (VMMDevHGCMCall )pHeader;
1631	rc = vmmdevR3HgcmCompleteCallRequest(pDevIns, pCmd, pHGCMCall, (uint8_t *)pHeader);
1632	#ifdef VBOX_WITH_DTRACE
1633	idFunction = pCmd->u.call.u32Function;
1634	idClient = pCmd->u.call.u32ClientID;
1635	#endif
1636	break;
1637	}
1638
1639	case VMMDevReq_HGCMConnect:
1640	{
1641	/* save the client id in the guest request packet */
1642	VMMDevHGCMConnect pHGCMConnect = (VMMDevHGCMConnect )pHeader;
1643	pHGCMConnect->u32ClientID = pCmd->u.connect.u32ClientID;
1644	break;
1645	}
1646
1647	default:
1648	/* make compiler happy */
1649	break;
1650	}
1651	}
1652	else
1653	{
1654	/* Guest has changed the command type. */
1655	LogRelMax(50, ("VMMDEV: Invalid HGCM command: pCmd->enmCmdType = 0x%08X, pHeader->header.requestType = 0x%08X\n",
1656	pCmd->enmCmdType, pHeader->header.requestType));
1657
1658	ASSERT_GUEST_FAILED_STMT(rc = VERR_INVALID_PARAMETER);
1659	}
1660
1661	/* Setup return code for the guest. */
1662	if (RT_SUCCESS(rc))
1663	pHeader->result = result;
1664	else
1665	pHeader->result = rc;
1666
1667	/* Mark request as processed. */
1668	ASMAtomicOrU32(&pHeader->fu32Flags, VBOX_HGCM_REQ_DONE);
1669
1670	/* Now, when the command was removed from the internal list, notify the guest. */
1671	VMMDevNotifyGuest(pDevIns, pThis, pThisCC, VMMDEV_EVENT_HGCM);
1672	}
1673
1674	/* Set the status to success for now, though we might consider passing
1675	along the vmmdevR3HgcmCompleteCallRequest errors... */
1676	rc = VINF_SUCCESS;
1677	}
1678	else
1679	{
1680	LogFlowFunc(("Cancelled command %p\n", pCmd));
1681	rc = VERR_CANCELLED;
1682	}
1683
1684	#ifndef VBOX_WITHOUT_RELEASE_STATISTICS
1685	/* Save for final stats. */
1686	uint64_t const tsArrival = pCmd->tsArrival;
1687	uint64_t const tsComplete = pCmd->tsComplete;
1688	#endif
1689
1690	/* Deallocate the command memory. */
1691	VBOXDD_HGCMCALL_COMPLETED_DONE(pCmd, idFunction, idClient, result);
1692	vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd);
1693
1694	#ifndef VBOX_WITHOUT_RELEASE_STATISTICS
1695	/* Update stats. */
1696	uint64_t tsNow;
1697	STAM_GET_TS(tsNow);
1698	STAM_REL_PROFILE_ADD_PERIOD(&pThisCC->StatHgcmCmdCompletion, tsNow - tsComplete);
1699	if (tsArrival != 0)
1700	STAM_REL_PROFILE_ADD_PERIOD(&pThisCC->StatHgcmCmdTotal, tsNow - tsArrival);
1701	#endif
1702
1703	return rc;
1704	}
1705
1706	/**
1707	* HGCM callback for request completion. Forwards to hgcmCompletedWorker.
1708	*
1709	* @returns VINF_SUCCESS or VERR_CANCELLED.
1710	* @param pInterface Pointer to this PDM interface.
1711	* @param result HGCM completion status code (VBox status code).
1712	* @param pCmd Completed command, which contains updated host parameters.
1713	*/
1714	DECLCALLBACK(int) hgcmR3Completed(PPDMIHGCMPORT pInterface, int32_t result, PVBOXHGCMCMD pCmd)
1715	{
1716	#if 0 /* This seems to be significantly slower. Half of MsgTotal time seems to be spend here. */
1717	PVMMDEVCC pThisCC = RT_FROM_MEMBER(pInterface, VMMDEVCC, IHGCMPort);
1718	STAM_GET_TS(pCmd->tsComplete);
1719
1720	VBOXDD_HGCMCALL_COMPLETED_REQ(pCmd, result);
1721
1722	/** @todo no longer necessary to forward to EMT, but it might be more
1723	* efficient...? */
1724	/* Not safe to execute asynchronously; forward to EMT */
1725	int rc = VMR3ReqCallVoidNoWait(PDMDevHlpGetVM(pDevIns), VMCPUID_ANY,
1726	(PFNRT)hgcmCompletedWorker, 3, pInterface, result, pCmd);
1727	AssertRC(rc);
1728	return VINF_SUCCESS; /* cannot tell if canceled or not... */
1729	#else
1730	STAM_GET_TS(pCmd->tsComplete);
1731	VBOXDD_HGCMCALL_COMPLETED_REQ(pCmd, result);
1732	return hgcmCompletedWorker(pInterface, result, pCmd);
1733	#endif
1734	}
1735
1736	/**
1737	* @interface_method_impl{PDMIHGCMPORT,pfnIsCmdRestored}
1738	*/
1739	DECLCALLBACK(bool) hgcmR3IsCmdRestored(PPDMIHGCMPORT pInterface, PVBOXHGCMCMD pCmd)
1740	{
1741	RT_NOREF(pInterface);
1742	return pCmd && pCmd->fRestored;
1743	}
1744
1745	/**
1746	* @interface_method_impl{PDMIHGCMPORT,pfnIsCmdCancelled}
1747	*/
1748	DECLCALLBACK(bool) hgcmR3IsCmdCancelled(PPDMIHGCMPORT pInterface, PVBOXHGCMCMD pCmd)
1749	{
1750	RT_NOREF(pInterface);
1751	return pCmd && pCmd->fCancelled;
1752	}
1753
1754	/**
1755	* @interface_method_impl{PDMIHGCMPORT,pfnGetRequestor}
1756	*/
1757	DECLCALLBACK(uint32_t) hgcmR3GetRequestor(PPDMIHGCMPORT pInterface, PVBOXHGCMCMD pCmd)
1758	{
1759	PVMMDEVCC pThisCC = RT_FROM_MEMBER(pInterface, VMMDEVCC, IHGCMPort);
1760	PVMMDEV pThis = PDMDEVINS_2_DATA(pThisCC->pDevIns, PVMMDEV);
1761	AssertPtrReturn(pCmd, VMMDEV_REQUESTOR_LOWEST);
1762	if (pThis->guestInfo2.fFeatures & VBOXGSTINFO2_F_REQUESTOR_INFO)
1763	return pCmd->fRequestor;
1764	return VMMDEV_REQUESTOR_LEGACY;
1765	}
1766
1767	/**
1768	* @interface_method_impl{PDMIHGCMPORT,pfnGetVMMDevSessionId}
1769	*/
1770	DECLCALLBACK(uint64_t) hgcmR3GetVMMDevSessionId(PPDMIHGCMPORT pInterface)
1771	{
1772	PVMMDEVCC pThisCC = RT_FROM_MEMBER(pInterface, VMMDEVCC, IHGCMPort);
1773	PVMMDEV pThis = PDMDEVINS_2_DATA(pThisCC->pDevIns, PVMMDEV);
1774	return pThis->idSession;
1775	}
1776
1777	/** Save information about pending HGCM requests from pThisCC->listHGCMCmd.
1778	*
1779	* @returns VBox status code that the guest should see.
1780	* @param pThisCC The VMMDev ring-3 instance data.
1781	* @param pSSM SSM handle for SSM functions.
1782	*
1783	* @thread EMT
1784	*/
1785	int vmmdevR3HgcmSaveState(PVMMDEVCC pThisCC, PSSMHANDLE pSSM)
1786	{
1787	LogFlowFunc(("\n"));
1788
1789	/* Compute how many commands are pending. */
1790	uint32_t cCmds = 0;
1791	PVBOXHGCMCMD pCmd;
1792	RTListForEach(&pThisCC->listHGCMCmd, pCmd, VBOXHGCMCMD, node)
1793	{
1794	LogFlowFunc(("pCmd %p\n", pCmd));
1795	++cCmds;
1796	}
1797	LogFlowFunc(("cCmds = %d\n", cCmds));
1798
1799	/* Save number of commands. */
1800	int rc = SSMR3PutU32(pSSM, cCmds);
1801	AssertRCReturn(rc, rc);
1802
1803	if (cCmds > 0)
1804	{
1805	RTListForEach(&pThisCC->listHGCMCmd, pCmd, VBOXHGCMCMD, node)
1806	{
1807	LogFlowFunc(("Saving %RGp, size %d\n", pCmd->GCPhys, pCmd->cbRequest));
1808
1809	/** @todo Don't save cancelled requests! It serves no purpose. See restore and
1810	* @bugref{4032#c4} for details. */
1811	SSMR3PutU32 (pSSM, (uint32_t)pCmd->enmCmdType);
1812	SSMR3PutBool (pSSM, pCmd->fCancelled);
1813	SSMR3PutGCPhys (pSSM, pCmd->GCPhys);
1814	SSMR3PutU32 (pSSM, pCmd->cbRequest);
1815	SSMR3PutU32 (pSSM, (uint32_t)pCmd->enmRequestType);
1816	const uint32_t cParms = pCmd->enmCmdType == VBOXHGCMCMDTYPE_CALL ? pCmd->u.call.cParms : 0;
1817	rc = SSMR3PutU32(pSSM, cParms);
1818	AssertRCReturn(rc, rc);
1819
1820	if (pCmd->enmCmdType == VBOXHGCMCMDTYPE_CALL)
1821	{
1822	SSMR3PutU32 (pSSM, pCmd->u.call.u32ClientID);
1823	rc = SSMR3PutU32(pSSM, pCmd->u.call.u32Function);
1824	AssertRCReturn(rc, rc);
1825
1826	/* Guest parameters. */
1827	uint32_t i;
1828	for (i = 0; i < pCmd->u.call.cParms; ++i)
1829	{
1830	VBOXHGCMGUESTPARM * const pGuestParm = &pCmd->u.call.paGuestParms[i];
1831
1832	rc = SSMR3PutU32(pSSM, (uint32_t)pGuestParm->enmType);
1833	AssertRCReturn(rc, rc);
1834
1835	if ( pGuestParm->enmType == VMMDevHGCMParmType_32bit
1836	\|\| pGuestParm->enmType == VMMDevHGCMParmType_64bit)
1837	{
1838	const VBOXHGCMPARMVAL * const pVal = &pGuestParm->u.val;
1839	SSMR3PutU64 (pSSM, pVal->u64Value);
1840	SSMR3PutU32 (pSSM, pVal->offValue);
1841	rc = SSMR3PutU32(pSSM, pVal->cbValue);
1842	}
1843	else if ( pGuestParm->enmType == VMMDevHGCMParmType_LinAddr_In
1844	\|\| pGuestParm->enmType == VMMDevHGCMParmType_LinAddr_Out
1845	\|\| pGuestParm->enmType == VMMDevHGCMParmType_LinAddr
1846	\|\| pGuestParm->enmType == VMMDevHGCMParmType_PageList
1847	\|\| pGuestParm->enmType == VMMDevHGCMParmType_Embedded
1848	\|\| pGuestParm->enmType == VMMDevHGCMParmType_ContiguousPageList)
1849	{
1850	const VBOXHGCMPARMPTR * const pPtr = &pGuestParm->u.ptr;
1851	SSMR3PutU32 (pSSM, pPtr->cbData);
1852	SSMR3PutU32 (pSSM, pPtr->offFirstPage);
1853	SSMR3PutU32 (pSSM, pPtr->cPages);
1854	rc = SSMR3PutU32(pSSM, pPtr->fu32Direction);
1855
1856	uint32_t iPage;
1857	for (iPage = 0; RT_SUCCESS(rc) && iPage < pPtr->cPages; ++iPage)
1858	rc = SSMR3PutGCPhys(pSSM, pPtr->paPages[iPage]);
1859	}
1860	else if (pGuestParm->enmType == VMMDevHGCMParmType_NoBouncePageList)
1861	{
1862	/* We don't have the page addresses here, so it will need to be
1863	restored from guest memory. This isn't an issue as it is only
1864	use with services which won't survive a save/restore anyway. */
1865	}
1866	else
1867	{
1868	AssertFailedStmt(rc = VERR_INTERNAL_ERROR);
1869	}
1870	AssertRCReturn(rc, rc);
1871	}
1872	}
1873	else if (pCmd->enmCmdType == VBOXHGCMCMDTYPE_CONNECT)
1874	{
1875	SSMR3PutU32(pSSM, pCmd->u.connect.u32ClientID);
1876	SSMR3PutMem(pSSM, pCmd->u.connect.pLoc, sizeof(*pCmd->u.connect.pLoc));
1877	}
1878	else if (pCmd->enmCmdType == VBOXHGCMCMDTYPE_DISCONNECT)
1879	{
1880	SSMR3PutU32(pSSM, pCmd->u.disconnect.u32ClientID);
1881	}
1882	else
1883	{
1884	AssertFailedReturn(VERR_INTERNAL_ERROR);
1885	}
1886
1887	/* A reserved field, will allow to extend saved data for a command. */
1888	rc = SSMR3PutU32(pSSM, 0);
1889	AssertRCReturn(rc, rc);
1890	}
1891	}
1892
1893	/* A reserved field, will allow to extend saved data for VMMDevHGCM. */
1894	rc = SSMR3PutU32(pSSM, 0);
1895	AssertRCReturn(rc, rc);
1896
1897	return rc;
1898	}
1899
1900	/** Load information about pending HGCM requests.
1901	*
1902	* Allocate VBOXHGCMCMD commands and add them to pThisCC->listHGCMCmd
1903	* temporarily. vmmdevR3HgcmLoadStateDone will process the temporary list. This
1904	* includes loading the correct fRequestor fields.
1905	*
1906	* @returns VBox status code that the guest should see.
1907	* @param pDevIns The device instance.
1908	* @param pThis The VMMDev shared instance data.
1909	* @param pThisCC The VMMDev ring-3 instance data.
1910	* @param pSSM SSM handle for SSM functions.
1911	* @param uVersion Saved state version.
1912	*
1913	* @thread EMT
1914	*/
1915	int vmmdevR3HgcmLoadState(PPDMDEVINS pDevIns, PVMMDEV pThis, PVMMDEVCC pThisCC, PSSMHANDLE pSSM, uint32_t uVersion)
1916	{
1917	LogFlowFunc(("\n"));
1918
1919	pThisCC->uSavedStateVersion = uVersion; /* For vmmdevR3HgcmLoadStateDone */
1920
1921	/* Read how many commands were pending. */
1922	uint32_t cCmds = 0;
1923	int rc = SSMR3GetU32(pSSM, &cCmds);
1924	AssertRCReturn(rc, rc);
1925
1926	LogFlowFunc(("cCmds = %d\n", cCmds));
1927
1928	if (uVersion >= VMMDEV_SAVED_STATE_VERSION_HGCM_PARAMS)
1929	{
1930	/* Saved information about all HGCM parameters. */
1931	uint32_t u32;
1932
1933	uint32_t iCmd;
1934	for (iCmd = 0; iCmd < cCmds; ++iCmd)
1935	{
1936	/* Command fields. */
1937	VBOXHGCMCMDTYPE enmCmdType;
1938	bool fCancelled;
1939	RTGCPHYS GCPhys;
1940	uint32_t cbRequest;
1941	VMMDevRequestType enmRequestType;
1942	uint32_t cParms;
1943
1944	SSMR3GetU32 (pSSM, &u32);
1945	enmCmdType = (VBOXHGCMCMDTYPE)u32;
1946	SSMR3GetBool (pSSM, &fCancelled);
1947	SSMR3GetGCPhys (pSSM, &GCPhys);
1948	SSMR3GetU32 (pSSM, &cbRequest);
1949	SSMR3GetU32 (pSSM, &u32);
1950	enmRequestType = (VMMDevRequestType)u32;
1951	rc = SSMR3GetU32(pSSM, &cParms);
1952	AssertRCReturn(rc, rc);
1953
1954	PVBOXHGCMCMD pCmd = vmmdevR3HgcmCmdAlloc(pThisCC, enmCmdType, GCPhys, cbRequest, cParms, 0 /fRequestor/);
1955	AssertReturn(pCmd, VERR_NO_MEMORY);
1956
1957	pCmd->fCancelled = fCancelled;
1958	pCmd->GCPhys = GCPhys;
1959	pCmd->cbRequest = cbRequest;
1960	pCmd->enmRequestType = enmRequestType;
1961
1962	if (enmCmdType == VBOXHGCMCMDTYPE_CALL)
1963	{
1964	SSMR3GetU32 (pSSM, &pCmd->u.call.u32ClientID);
1965	rc = SSMR3GetU32(pSSM, &pCmd->u.call.u32Function);
1966	AssertRCReturn(rc, rc);
1967
1968	/* Guest parameters. */
1969	uint32_t i;
1970	for (i = 0; i < cParms; ++i)
1971	{
1972	VBOXHGCMGUESTPARM * const pGuestParm = &pCmd->u.call.paGuestParms[i];
1973
1974	rc = SSMR3GetU32(pSSM, &u32);
1975	AssertRCReturn(rc, rc);
1976	pGuestParm->enmType = (HGCMFunctionParameterType)u32;
1977
1978	if ( pGuestParm->enmType == VMMDevHGCMParmType_32bit
1979	\|\| pGuestParm->enmType == VMMDevHGCMParmType_64bit)
1980	{
1981	VBOXHGCMPARMVAL * const pVal = &pGuestParm->u.val;
1982	SSMR3GetU64 (pSSM, &pVal->u64Value);
1983	SSMR3GetU32 (pSSM, &pVal->offValue);
1984	rc = SSMR3GetU32(pSSM, &pVal->cbValue);
1985	}
1986	else if ( pGuestParm->enmType == VMMDevHGCMParmType_LinAddr_In
1987	\|\| pGuestParm->enmType == VMMDevHGCMParmType_LinAddr_Out
1988	\|\| pGuestParm->enmType == VMMDevHGCMParmType_LinAddr
1989	\|\| pGuestParm->enmType == VMMDevHGCMParmType_PageList
1990	\|\| pGuestParm->enmType == VMMDevHGCMParmType_Embedded
1991	\|\| pGuestParm->enmType == VMMDevHGCMParmType_ContiguousPageList)
1992	{
1993	VBOXHGCMPARMPTR * const pPtr = &pGuestParm->u.ptr;
1994	SSMR3GetU32 (pSSM, &pPtr->cbData);
1995	SSMR3GetU32 (pSSM, &pPtr->offFirstPage);
1996	SSMR3GetU32 (pSSM, &pPtr->cPages);
1997	rc = SSMR3GetU32(pSSM, &pPtr->fu32Direction);
1998	if (RT_SUCCESS(rc))
1999	{
2000	if (pPtr->cPages == 1)
2001	pPtr->paPages = &pPtr->GCPhysSinglePage;
2002	else
2003	{
2004	AssertReturn( pGuestParm->enmType != VMMDevHGCMParmType_Embedded
2005	&& pGuestParm->enmType != VMMDevHGCMParmType_ContiguousPageList, VERR_INTERNAL_ERROR_3);
2006	pPtr->paPages = (RTGCPHYS )RTMemAlloc(pPtr->cPages sizeof(RTGCPHYS));
2007	AssertStmt(pPtr->paPages, rc = VERR_NO_MEMORY);
2008	}
2009
2010	if (RT_SUCCESS(rc))
2011	{
2012	uint32_t iPage;
2013	for (iPage = 0; iPage < pPtr->cPages; ++iPage)
2014	rc = SSMR3GetGCPhys(pSSM, &pPtr->paPages[iPage]);
2015	}
2016	}
2017	}
2018	else if (pGuestParm->enmType == VMMDevHGCMParmType_NoBouncePageList)
2019	{
2020	/* This request type can only be stored from guest memory for now. */
2021	pCmd->fRestoreFromGuestMem = true;
2022	}
2023	else
2024	{
2025	AssertFailedStmt(rc = VERR_INTERNAL_ERROR);
2026	}
2027	AssertRCReturn(rc, rc);
2028	}
2029	}
2030	else if (enmCmdType == VBOXHGCMCMDTYPE_CONNECT)
2031	{
2032	SSMR3GetU32(pSSM, &pCmd->u.connect.u32ClientID);
2033	rc = SSMR3GetMem(pSSM, pCmd->u.connect.pLoc, sizeof(*pCmd->u.connect.pLoc));
2034	AssertRCReturn(rc, rc);
2035	}
2036	else if (enmCmdType == VBOXHGCMCMDTYPE_DISCONNECT)
2037	{
2038	rc = SSMR3GetU32(pSSM, &pCmd->u.disconnect.u32ClientID);
2039	AssertRCReturn(rc, rc);
2040	}
2041	else
2042	{
2043	AssertFailedReturn(VERR_INTERNAL_ERROR);
2044	}
2045
2046	/* A reserved field, will allow to extend saved data for a command. */
2047	rc = SSMR3GetU32(pSSM, &u32);
2048	AssertRCReturn(rc, rc);
2049
2050	/*
2051	* Do not restore cancelled calls. Why do we save them to start with?
2052	*
2053	* The guest memory no longer contains a valid request! So, it is not
2054	* possible to restore it. The memory is often reused for a new request
2055	* by now and we will end up trying to complete that more than once if
2056	* we restore a cancelled call. In some cases VERR_HGCM_INVALID_CLIENT_ID
2057	* is returned, though it might just be silent memory corruption.
2058	*/
2059	/* See current version above. */
2060	if (!fCancelled)
2061	vmmdevR3HgcmAddCommand(pDevIns, pThis, pThisCC, pCmd);
2062	else
2063	{
2064	Log(("vmmdevR3HgcmLoadState: Skipping cancelled request: enmCmdType=%d GCPhys=%#RX32 LB %#x\n",
2065	enmCmdType, GCPhys, cbRequest));
2066	vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd);
2067	}
2068	}
2069
2070	/* A reserved field, will allow to extend saved data for VMMDevHGCM. */
2071	rc = SSMR3GetU32(pSSM, &u32);
2072	AssertRCReturn(rc, rc);
2073	}
2074	else if (uVersion >= 9)
2075	{
2076	/* Version 9+: Load information about commands. Pre-rewrite. */
2077	uint32_t u32;
2078
2079	uint32_t iCmd;
2080	for (iCmd = 0; iCmd < cCmds; ++iCmd)
2081	{
2082	VBOXHGCMCMDTYPE enmCmdType;
2083	bool fCancelled;
2084	RTGCPHYS GCPhys;
2085	uint32_t cbRequest;
2086	uint32_t cLinAddrs;
2087
2088	SSMR3GetGCPhys (pSSM, &GCPhys);
2089	rc = SSMR3GetU32(pSSM, &cbRequest);
2090	AssertRCReturn(rc, rc);
2091
2092	LogFlowFunc(("Restoring %RGp size %x bytes\n", GCPhys, cbRequest));
2093
2094	/* For uVersion <= 12, this was the size of entire command.
2095	* Now the command is reconstructed in vmmdevR3HgcmLoadStateDone.
2096	*/
2097	if (uVersion <= 12)
2098	SSMR3Skip(pSSM, sizeof (uint32_t));
2099
2100	SSMR3GetU32 (pSSM, &u32);
2101	enmCmdType = (VBOXHGCMCMDTYPE)u32;
2102	SSMR3GetBool (pSSM, &fCancelled);
2103	/* How many linear pointers. Always 0 if not a call command. */
2104	rc = SSMR3GetU32(pSSM, &cLinAddrs);
2105	AssertRCReturn(rc, rc);
2106
2107	PVBOXHGCMCMD pCmd = vmmdevR3HgcmCmdAlloc(pThisCC, enmCmdType, GCPhys, cbRequest, cLinAddrs, 0 /fRequestor/);
2108	AssertReturn(pCmd, VERR_NO_MEMORY);
2109
2110	pCmd->fCancelled = fCancelled;
2111	pCmd->GCPhys = GCPhys;
2112	pCmd->cbRequest = cbRequest;
2113
2114	if (cLinAddrs > 0)
2115	{
2116	/* Skip number of pages for all LinAddrs in this command. */
2117	SSMR3Skip(pSSM, sizeof(uint32_t));
2118
2119	uint32_t i;
2120	for (i = 0; i < cLinAddrs; ++i)
2121	{
2122	VBOXHGCMPARMPTR * const pPtr = &pCmd->u.call.paGuestParms[i].u.ptr;
2123
2124	/* Index of the parameter. Use cbData field to store the index. */
2125	SSMR3GetU32 (pSSM, &pPtr->cbData);
2126	SSMR3GetU32 (pSSM, &pPtr->offFirstPage);
2127	rc = SSMR3GetU32(pSSM, &pPtr->cPages);
2128	AssertRCReturn(rc, rc);
2129
2130	pPtr->paPages = (RTGCPHYS )RTMemAlloc(pPtr->cPages sizeof(RTGCPHYS));
2131	AssertReturn(pPtr->paPages, VERR_NO_MEMORY);
2132
2133	uint32_t iPage;
2134	for (iPage = 0; iPage < pPtr->cPages; ++iPage)
2135	rc = SSMR3GetGCPhys(pSSM, &pPtr->paPages[iPage]);
2136	}
2137	}
2138
2139	/* A reserved field, will allow to extend saved data for a command. */
2140	rc = SSMR3GetU32(pSSM, &u32);
2141	AssertRCReturn(rc, rc);
2142
2143	/* See current version above. */
2144	if (!fCancelled)
2145	vmmdevR3HgcmAddCommand(pDevIns, pThis, pThisCC, pCmd);
2146	else
2147	{
2148	Log(("vmmdevR3HgcmLoadState: Skipping cancelled request: enmCmdType=%d GCPhys=%#RX32 LB %#x\n",
2149	enmCmdType, GCPhys, cbRequest));
2150	vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd);
2151	}
2152	}
2153
2154	/* A reserved field, will allow to extend saved data for VMMDevHGCM. */
2155	rc = SSMR3GetU32(pSSM, &u32);
2156	AssertRCReturn(rc, rc);
2157	}
2158	else
2159	{
2160	/* Ancient. Only the guest physical address is saved. */
2161	uint32_t iCmd;
2162	for (iCmd = 0; iCmd < cCmds; ++iCmd)
2163	{
2164	RTGCPHYS GCPhys;
2165	uint32_t cbRequest;
2166
2167	SSMR3GetGCPhys(pSSM, &GCPhys);
2168	rc = SSMR3GetU32(pSSM, &cbRequest);
2169	AssertRCReturn(rc, rc);
2170
2171	LogFlowFunc(("Restoring %RGp size %x bytes\n", GCPhys, cbRequest));
2172
2173	PVBOXHGCMCMD pCmd = vmmdevR3HgcmCmdAlloc(pThisCC, VBOXHGCMCMDTYPE_LOADSTATE, GCPhys, cbRequest, 0, 0 /fRequestor/);
2174	AssertReturn(pCmd, VERR_NO_MEMORY);
2175
2176	vmmdevR3HgcmAddCommand(pDevIns, pThis, pThisCC, pCmd);
2177	}
2178	}
2179
2180	return rc;
2181	}
2182
2183	/** Restore HGCM connect command loaded from old saved state.
2184	*
2185	* @returns VBox status code that the guest should see.
2186	* @param pThisCC The VMMDev ring-3 instance data.
2187	* @param uSavedStateVersion The saved state version the command has been loaded from.
2188	* @param pLoadedCmd Command loaded from saved state, it is imcomplete and needs restoration.
2189	* @param pReq The guest request (cached in host memory).
2190	* @param cbReq Size of the guest request.
2191	* @param enmRequestType Type of the HGCM request.
2192	* @param ppRestoredCmd Where to store pointer to newly allocated restored command.
2193	*/
2194	static int vmmdevR3HgcmRestoreConnect(PVMMDEVCC pThisCC, uint32_t uSavedStateVersion, const VBOXHGCMCMD *pLoadedCmd,
2195	VMMDevHGCMConnect *pReq, uint32_t cbReq, VMMDevRequestType enmRequestType,
2196	VBOXHGCMCMD **ppRestoredCmd)
2197	{
2198	/* Verify the request. */
2199	ASSERT_GUEST_RETURN(cbReq >= sizeof(*pReq), VERR_MISMATCH);
2200	if (uSavedStateVersion >= 9)
2201	ASSERT_GUEST_RETURN(pLoadedCmd->enmCmdType == VBOXHGCMCMDTYPE_CONNECT, VERR_MISMATCH);
2202
2203	PVBOXHGCMCMD pCmd = vmmdevR3HgcmCmdAlloc(pThisCC, VBOXHGCMCMDTYPE_CONNECT, pLoadedCmd->GCPhys, cbReq, 0,
2204	pReq->header.header.fRequestor);
2205	AssertReturn(pCmd, VERR_NO_MEMORY);
2206
2207	Assert(pLoadedCmd->fCancelled == false);
2208	pCmd->fCancelled = false;
2209	pCmd->fRestored = true;
2210	pCmd->enmRequestType = enmRequestType;
2211
2212	vmmdevR3HgcmConnectFetch(pReq, pCmd);
2213
2214	*ppRestoredCmd = pCmd;
2215	return VINF_SUCCESS;
2216	}
2217
2218	/** Restore HGCM disconnect command loaded from old saved state.
2219	*
2220	* @returns VBox status code that the guest should see.
2221	* @param pThisCC The VMMDev ring-3 instance data.
2222	* @param uSavedStateVersion The saved state version the command has been loaded from.
2223	* @param pLoadedCmd Command loaded from saved state, it is imcomplete and needs restoration.
2224	* @param pReq The guest request (cached in host memory).
2225	* @param cbReq Size of the guest request.
2226	* @param enmRequestType Type of the HGCM request.
2227	* @param ppRestoredCmd Where to store pointer to newly allocated restored command.
2228	*/
2229	static int vmmdevR3HgcmRestoreDisconnect(PVMMDEVCC pThisCC, uint32_t uSavedStateVersion, const VBOXHGCMCMD *pLoadedCmd,
2230	VMMDevHGCMDisconnect *pReq, uint32_t cbReq, VMMDevRequestType enmRequestType,
2231	VBOXHGCMCMD **ppRestoredCmd)
2232	{
2233	/* Verify the request. */
2234	ASSERT_GUEST_RETURN(cbReq >= sizeof(*pReq), VERR_MISMATCH);
2235	if (uSavedStateVersion >= 9)
2236	ASSERT_GUEST_RETURN(pLoadedCmd->enmCmdType == VBOXHGCMCMDTYPE_DISCONNECT, VERR_MISMATCH);
2237
2238	PVBOXHGCMCMD pCmd = vmmdevR3HgcmCmdAlloc(pThisCC, VBOXHGCMCMDTYPE_DISCONNECT, pLoadedCmd->GCPhys, cbReq, 0,
2239	pReq->header.header.fRequestor);
2240	AssertReturn(pCmd, VERR_NO_MEMORY);
2241
2242	Assert(pLoadedCmd->fCancelled == false);
2243	pCmd->fCancelled = false;
2244	pCmd->fRestored = true;
2245	pCmd->enmRequestType = enmRequestType;
2246
2247	vmmdevR3HgcmDisconnectFetch(pReq, pCmd);
2248
2249	*ppRestoredCmd = pCmd;
2250	return VINF_SUCCESS;
2251	}
2252
2253	/** Restore HGCM call command loaded from old saved state.
2254	*
2255	* @returns VBox status code that the guest should see.
2256	* @param pDevIns The device instance.
2257	* @param pThisCC The VMMDev ring-3 instance data.
2258	* @param uSavedStateVersion The saved state version the command has been loaded from.
2259	* @param pLoadedCmd Command loaded from saved state, it is imcomplete and needs restoration.
2260	* @param pReq The guest request (cached in host memory).
2261	* @param cbReq Size of the guest request.
2262	* @param enmRequestType Type of the HGCM request.
2263	* @param ppRestoredCmd Where to store pointer to newly allocated restored command.
2264	*/
2265	static int vmmdevR3HgcmRestoreCall(PPDMDEVINS pDevIns, PVMMDEVCC pThisCC, uint32_t uSavedStateVersion, const VBOXHGCMCMD *pLoadedCmd,
2266	VMMDevHGCMCall *pReq, uint32_t cbReq, VMMDevRequestType enmRequestType,
2267	VBOXHGCMCMD **ppRestoredCmd)
2268	{
2269	/* Verify the request. */
2270	ASSERT_GUEST_RETURN(cbReq >= sizeof(*pReq), VERR_MISMATCH);
2271	if (uSavedStateVersion >= 9)
2272	{
2273	ASSERT_GUEST_RETURN(pLoadedCmd->enmCmdType == VBOXHGCMCMDTYPE_CALL, VERR_MISMATCH);
2274	Assert(pLoadedCmd->fCancelled == false);
2275	}
2276
2277	PVBOXHGCMCMD pCmd;
2278	uint32_t cbHGCMParmStruct;
2279	int rc = vmmdevR3HgcmCallAlloc(pThisCC, pReq, cbReq, pLoadedCmd->GCPhys, enmRequestType, &pCmd, &cbHGCMParmStruct);
2280	if (RT_FAILURE(rc))
2281	return rc;
2282
2283	/* pLoadedCmd is fake, it does not contain actual call parameters. Only pagelists for LinAddr. */
2284	pCmd->fCancelled = false;
2285	pCmd->fRestored = true;
2286	pCmd->enmRequestType = enmRequestType;
2287
2288	rc = vmmdevR3HgcmCallFetchGuestParms(pDevIns, pThisCC, pCmd, pReq, cbReq, enmRequestType, cbHGCMParmStruct);
2289	if (RT_SUCCESS(rc))
2290	{
2291	/* Update LinAddr parameters from pLoadedCmd.
2292	* pLoadedCmd->u.call.cParms is actually the number of LinAddrs, see vmmdevR3HgcmLoadState.
2293	*/
2294	uint32_t iLinAddr;
2295	for (iLinAddr = 0; iLinAddr < pLoadedCmd->u.call.cParms; ++iLinAddr)
2296	{
2297	VBOXHGCMGUESTPARM * const pLoadedParm = &pLoadedCmd->u.call.paGuestParms[iLinAddr];
2298	/* pLoadedParm->cbData is actually index of the LinAddr parameter, see vmmdevR3HgcmLoadState. */
2299	const uint32_t iParm = pLoadedParm->u.ptr.cbData;
2300	ASSERT_GUEST_STMT_BREAK(iParm < pCmd->u.call.cParms, rc = VERR_MISMATCH);
2301
2302	VBOXHGCMGUESTPARM * const pGuestParm = &pCmd->u.call.paGuestParms[iParm];
2303	ASSERT_GUEST_STMT_BREAK( pGuestParm->enmType == VMMDevHGCMParmType_LinAddr_In
2304	\|\| pGuestParm->enmType == VMMDevHGCMParmType_LinAddr_Out
2305	\|\| pGuestParm->enmType == VMMDevHGCMParmType_LinAddr,
2306	rc = VERR_MISMATCH);
2307	ASSERT_GUEST_STMT_BREAK( pLoadedParm->u.ptr.offFirstPage == pGuestParm->u.ptr.offFirstPage
2308	&& pLoadedParm->u.ptr.cPages == pGuestParm->u.ptr.cPages,
2309	rc = VERR_MISMATCH);
2310	memcpy(pGuestParm->u.ptr.paPages, pLoadedParm->u.ptr.paPages, pGuestParm->u.ptr.cPages * sizeof(RTGCPHYS));
2311	}
2312	}
2313
2314	if (RT_SUCCESS(rc))
2315	*ppRestoredCmd = pCmd;
2316	else
2317	vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd);
2318
2319	return rc;
2320	}
2321
2322	/** Allocate and initialize a HGCM command using the given request (pReqHdr)
2323	* and command loaded from saved state (pCmd).
2324	*
2325	* @returns VBox status code that the guest should see.
2326	* @param pDevIns The device instance.
2327	* @param pThisCC The VMMDev ring-3 instance data.
2328	* @param uSavedStateVersion Saved state version.
2329	* @param pLoadedCmd HGCM command which needs restoration.
2330	* @param pReqHdr The request (cached in host memory).
2331	* @param cbReq Size of the entire request (including HGCM parameters).
2332	* @param ppRestoredCmd Where to store pointer to restored command.
2333	*/
2334	static int vmmdevR3HgcmRestoreCommand(PPDMDEVINS pDevIns, PVMMDEVCC pThisCC, uint32_t uSavedStateVersion,
2335	const VBOXHGCMCMD pLoadedCmd, const VMMDevHGCMRequestHeader pReqHdr, uint32_t cbReq,
2336	VBOXHGCMCMD **ppRestoredCmd)
2337	{
2338	int rc;
2339
2340	/* Verify the request. */
2341	ASSERT_GUEST_RETURN(cbReq >= sizeof(VMMDevHGCMRequestHeader), VERR_MISMATCH);
2342	ASSERT_GUEST_RETURN(cbReq == pReqHdr->header.size, VERR_MISMATCH);
2343
2344	const VMMDevRequestType enmRequestType = pReqHdr->header.requestType;
2345	switch (enmRequestType)
2346	{
2347	case VMMDevReq_HGCMConnect:
2348	{
2349	VMMDevHGCMConnect pReq = (VMMDevHGCMConnect )pReqHdr;
2350	rc = vmmdevR3HgcmRestoreConnect(pThisCC, uSavedStateVersion, pLoadedCmd, pReq, cbReq, enmRequestType, ppRestoredCmd);
2351	break;
2352	}
2353
2354	case VMMDevReq_HGCMDisconnect:
2355	{
2356	VMMDevHGCMDisconnect pReq = (VMMDevHGCMDisconnect )pReqHdr;
2357	rc = vmmdevR3HgcmRestoreDisconnect(pThisCC, uSavedStateVersion, pLoadedCmd, pReq, cbReq, enmRequestType, ppRestoredCmd);
2358	break;
2359	}
2360
2361	#ifdef VBOX_WITH_64_BITS_GUESTS
2362	case VMMDevReq_HGCMCall64:
2363	#endif
2364	case VMMDevReq_HGCMCall32:
2365	{
2366	VMMDevHGCMCall pReq = (VMMDevHGCMCall )pReqHdr;
2367	rc = vmmdevR3HgcmRestoreCall(pDevIns, pThisCC, uSavedStateVersion, pLoadedCmd, pReq, cbReq, enmRequestType, ppRestoredCmd);
2368	break;
2369	}
2370
2371	default:
2372	ASSERT_GUEST_FAILED_RETURN(VERR_MISMATCH);
2373	}
2374
2375	return rc;
2376	}
2377
2378	/** Resubmit pending HGCM commands which were loaded form saved state.
2379	*
2380	* @returns VBox status code.
2381	* @param pDevIns The device instance.
2382	* @param pThis The VMMDev shared instance data.
2383	* @param pThisCC The VMMDev ring-3 instance data.
2384	*
2385	* @thread EMT
2386	*/
2387	int vmmdevR3HgcmLoadStateDone(PPDMDEVINS pDevIns, PVMMDEV pThis, PVMMDEVCC pThisCC)
2388	{
2389	/*
2390	* Resubmit pending HGCM commands to services.
2391	*
2392	* pThisCC->pHGCMCmdList contains commands loaded by vmmdevR3HgcmLoadState.
2393	*
2394	* Legacy saved states (pre VMMDEV_SAVED_STATE_VERSION_HGCM_PARAMS)
2395	* do not have enough information about the command parameters,
2396	* therefore it is necessary to reload at least some data from the
2397	* guest memory to construct commands.
2398	*
2399	* There are two types of legacy saved states which contain:
2400	* 1) the guest physical address and size of request;
2401	* 2) additionally page lists for LinAddr parameters.
2402	*
2403	* Legacy commands have enmCmdType = VBOXHGCMCMDTYPE_LOADSTATE?
2404	*/
2405
2406	int rcFunc = VINF_SUCCESS; /* This status code will make the function fail. I.e. VM will not start. */
2407
2408	/* Get local copy of the list of loaded commands. */
2409	RTLISTANCHOR listLoadedCommands;
2410	RTListMove(&listLoadedCommands, &pThisCC->listHGCMCmd);
2411
2412	/* Resubmit commands. */
2413	PVBOXHGCMCMD pCmd, pNext;
2414	RTListForEachSafe(&listLoadedCommands, pCmd, pNext, VBOXHGCMCMD, node)
2415	{
2416	int rcCmd = VINF_SUCCESS; /* This status code will make the HGCM command fail for the guest. */
2417
2418	RTListNodeRemove(&pCmd->node);
2419
2420	/*
2421	* Re-read the request from the guest memory.
2422	* It will be used to:
2423	* * reconstruct commands if legacy saved state has been restored;
2424	* * report an error to the guest if resubmit failed.
2425	*/
2426	VMMDevHGCMRequestHeader pReqHdr = (VMMDevHGCMRequestHeader )RTMemAlloc(pCmd->cbRequest);
2427	AssertBreakStmt(pReqHdr, vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd); rcFunc = VERR_NO_MEMORY);
2428
2429	PDMDevHlpPhysRead(pDevIns, pCmd->GCPhys, pReqHdr, pCmd->cbRequest);
2430	RT_UNTRUSTED_NONVOLATILE_COPY_FENCE();
2431
2432	if (pThisCC->pHGCMDrv)
2433	{
2434	/*
2435	* Reconstruct legacy commands.
2436	*/
2437	if (RT_LIKELY( pThisCC->uSavedStateVersion >= VMMDEV_SAVED_STATE_VERSION_HGCM_PARAMS
2438	&& !pCmd->fRestoreFromGuestMem))
2439	{ /* likely */ }
2440	else
2441	{
2442	PVBOXHGCMCMD pRestoredCmd = NULL;
2443	rcCmd = vmmdevR3HgcmRestoreCommand(pDevIns, pThisCC, pThisCC->uSavedStateVersion, pCmd,
2444	pReqHdr, pCmd->cbRequest, &pRestoredCmd);
2445	if (RT_SUCCESS(rcCmd))
2446	{
2447	Assert(pCmd != pRestoredCmd); /* vmmdevR3HgcmRestoreCommand must allocate restored command. */
2448	vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd);
2449	pCmd = pRestoredCmd;
2450	}
2451	}
2452
2453	/* Resubmit commands. */
2454	if (RT_SUCCESS(rcCmd))
2455	{
2456	switch (pCmd->enmCmdType)
2457	{
2458	case VBOXHGCMCMDTYPE_CONNECT:
2459	{
2460	vmmdevR3HgcmAddCommand(pDevIns, pThis, pThisCC, pCmd);
2461	rcCmd = pThisCC->pHGCMDrv->pfnConnect(pThisCC->pHGCMDrv, pCmd, pCmd->u.connect.pLoc,
2462	&pCmd->u.connect.u32ClientID);
2463	if (RT_FAILURE(rcCmd))
2464	vmmdevR3HgcmRemoveCommand(pThisCC, pCmd);
2465	break;
2466	}
2467
2468	case VBOXHGCMCMDTYPE_DISCONNECT:
2469	{
2470	vmmdevR3HgcmAddCommand(pDevIns, pThis, pThisCC, pCmd);
2471	rcCmd = pThisCC->pHGCMDrv->pfnDisconnect(pThisCC->pHGCMDrv, pCmd, pCmd->u.disconnect.u32ClientID);
2472	if (RT_FAILURE(rcCmd))
2473	vmmdevR3HgcmRemoveCommand(pThisCC, pCmd);
2474	break;
2475	}
2476
2477	case VBOXHGCMCMDTYPE_CALL:
2478	{
2479	rcCmd = vmmdevR3HgcmInitHostParameters(pDevIns, pCmd, (uint8_t const *)pReqHdr);
2480	if (RT_SUCCESS(rcCmd))
2481	{
2482	vmmdevR3HgcmAddCommand(pDevIns, pThis, pThisCC, pCmd);
2483
2484	/* Pass the function call to HGCM connector for actual processing */
2485	uint64_t tsNow;
2486	STAM_GET_TS(tsNow);
2487	rcCmd = pThisCC->pHGCMDrv->pfnCall(pThisCC->pHGCMDrv, pCmd,
2488	pCmd->u.call.u32ClientID, pCmd->u.call.u32Function,
2489	pCmd->u.call.cParms, pCmd->u.call.paHostParms, tsNow);
2490	if (RT_FAILURE(rcCmd))
2491	{
2492	LogFunc(("pfnCall rc = %Rrc\n", rcCmd));
2493	vmmdevR3HgcmRemoveCommand(pThisCC, pCmd);
2494	}
2495	}
2496	break;
2497	}
2498
2499	default:
2500	AssertFailedStmt(rcCmd = VERR_INTERNAL_ERROR);
2501	}
2502	}
2503	}
2504	else
2505	AssertFailedStmt(rcCmd = VERR_INTERNAL_ERROR);
2506
2507	if (RT_SUCCESS(rcCmd))
2508	{ /* likely */ }
2509	else
2510	{
2511	/* Return the error to the guest. Guest may try to repeat the call. */
2512	pReqHdr->result = rcCmd;
2513	pReqHdr->header.rc = rcCmd;
2514	pReqHdr->fu32Flags \|= VBOX_HGCM_REQ_DONE;
2515
2516	/* Write back only the header. */
2517	PDMDevHlpPhysWrite(pDevIns, pCmd->GCPhys, pReqHdr, sizeof(*pReqHdr));
2518
2519	VMMDevNotifyGuest(pDevIns, pThis, pThisCC, VMMDEV_EVENT_HGCM);
2520
2521	/* Deallocate the command memory. */
2522	vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd);
2523	}
2524
2525	RTMemFree(pReqHdr);
2526	}
2527
2528	if (RT_FAILURE(rcFunc))
2529	{
2530	RTListForEachSafe(&listLoadedCommands, pCmd, pNext, VBOXHGCMCMD, node)
2531	{
2532	RTListNodeRemove(&pCmd->node);
2533	vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd);
2534	}
2535	}
2536
2537	return rcFunc;
2538	}
2539
2540
2541	/**
2542	* Counterpart to vmmdevR3HgcmInit().
2543	*
2544	* @param pDevIns The device instance.
2545	* @param pThisCC The VMMDev ring-3 instance data.
2546	*/
2547	void vmmdevR3HgcmDestroy(PPDMDEVINS pDevIns, PVMMDEVCC pThisCC)
2548	{
2549	LogFlowFunc(("\n"));
2550
2551	if (RTCritSectIsInitialized(&pThisCC->critsectHGCMCmdList))
2552	{
2553	PVBOXHGCMCMD pCmd, pNext;
2554	RTListForEachSafe(&pThisCC->listHGCMCmd, pCmd, pNext, VBOXHGCMCMD, node)
2555	{
2556	vmmdevR3HgcmRemoveCommand(pThisCC, pCmd);
2557	vmmdevR3HgcmCmdFree(pDevIns, pThisCC, pCmd);
2558	}
2559
2560	RTCritSectDelete(&pThisCC->critsectHGCMCmdList);
2561	}
2562
2563	AssertCompile(NIL_RTMEMCACHE == (RTMEMCACHE)0);
2564	if (pThisCC->hHgcmCmdCache != NIL_RTMEMCACHE)
2565	{
2566	RTMemCacheDestroy(pThisCC->hHgcmCmdCache);
2567	pThisCC->hHgcmCmdCache = NIL_RTMEMCACHE;
2568	}
2569	}
2570
2571
2572	/**
2573	* Initializes the HGCM specific state.
2574	*
2575	* Keeps VBOXHGCMCMDCACHED and friends local.
2576	*
2577	* @returns VBox status code.
2578	* @param pThisCC The VMMDev ring-3 instance data.
2579	*/
2580	int vmmdevR3HgcmInit(PVMMDEVCC pThisCC)
2581	{
2582	LogFlowFunc(("\n"));
2583
2584	RTListInit(&pThisCC->listHGCMCmd);
2585
2586	int rc = RTCritSectInit(&pThisCC->critsectHGCMCmdList);
2587	AssertLogRelRCReturn(rc, rc);
2588
2589	rc = RTMemCacheCreate(&pThisCC->hHgcmCmdCache, sizeof(VBOXHGCMCMDCACHED), 64, _1M, NULL, NULL, NULL, 0);
2590	AssertLogRelRCReturn(rc, rc);
2591
2592	pThisCC->u32HGCMEnabled = 0;
2593
2594	return VINF_SUCCESS;
2595	}
2596

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source: vbox/trunk/src/VBox/Devices/VMMDev/VMMDevHGCM.cpp@ 89121

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