memobj-r0drv-nt.cpp@ 28800

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1	/* $Id: memobj-r0drv-nt.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, NT.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.215389.xyz. 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	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*******************************************************************************
29	* Header Files *
30	*******************************************************************************/
31	#include "the-nt-kernel.h"
32
33	#include <iprt/memobj.h>
34	#include <iprt/alloc.h>
35	#include <iprt/assert.h>
36	#include <iprt/log.h>
37	#include <iprt/param.h>
38	#include <iprt/string.h>
39	#include <iprt/process.h>
40	#include "internal/memobj.h"
41
42
43	/*******************************************************************************
44	* Defined Constants And Macros *
45	*******************************************************************************/
46	/** Maximum number of bytes we try to lock down in one go.
47	* This is supposed to have a limit right below 256MB, but this appears
48	* to actually be much lower. The values here have been determined experimentally.
49	*/
50	#ifdef RT_ARCH_X86
51	# define MAX_LOCK_MEM_SIZE (3210241024) /* 32MB */
52	#endif
53	#ifdef RT_ARCH_AMD64
54	# define MAX_LOCK_MEM_SIZE (2410241024) /* 24MB */
55	#endif
56
57
58	/*******************************************************************************
59	* Structures and Typedefs *
60	*******************************************************************************/
61	/**
62	* The NT version of the memory object structure.
63	*/
64	typedef struct RTR0MEMOBJNT
65	{
66	/** The core structure. */
67	RTR0MEMOBJINTERNAL Core;
68	#ifndef IPRT_TARGET_NT4
69	/** Used MmAllocatePagesForMdl(). */
70	bool fAllocatedPagesForMdl;
71	#endif
72	/** Pointer returned by MmSecureVirtualMemory */
73	PVOID pvSecureMem;
74	/** The number of PMDLs (memory descriptor lists) in the array. */
75	uint32_t cMdls;
76	/** Array of MDL pointers. (variable size) */
77	PMDL apMdls[1];
78	} RTR0MEMOBJNT, *PRTR0MEMOBJNT;
79
80
81	int rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
82	{
83	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)pMem;
84
85	/*
86	* Deal with it on a per type basis (just as a variation).
87	*/
88	switch (pMemNt->Core.enmType)
89	{
90	case RTR0MEMOBJTYPE_LOW:
91	#ifndef IPRT_TARGET_NT4
92	if (pMemNt->fAllocatedPagesForMdl)
93	{
94	Assert(pMemNt->Core.pv && pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
95	MmUnmapLockedPages(pMemNt->Core.pv, pMemNt->apMdls[0]);
96	pMemNt->Core.pv = NULL;
97	if (pMemNt->pvSecureMem)
98	{
99	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
100	pMemNt->pvSecureMem = NULL;
101	}
102
103	MmFreePagesFromMdl(pMemNt->apMdls[0]);
104	ExFreePool(pMemNt->apMdls[0]);
105	pMemNt->apMdls[0] = NULL;
106	pMemNt->cMdls = 0;
107	break;
108	}
109	#endif
110	AssertFailed();
111	break;
112
113	case RTR0MEMOBJTYPE_PAGE:
114	Assert(pMemNt->Core.pv);
115	ExFreePool(pMemNt->Core.pv);
116	pMemNt->Core.pv = NULL;
117
118	Assert(pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
119	IoFreeMdl(pMemNt->apMdls[0]);
120	pMemNt->apMdls[0] = NULL;
121	pMemNt->cMdls = 0;
122	break;
123
124	case RTR0MEMOBJTYPE_CONT:
125	Assert(pMemNt->Core.pv);
126	MmFreeContiguousMemory(pMemNt->Core.pv);
127	pMemNt->Core.pv = NULL;
128
129	Assert(pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
130	IoFreeMdl(pMemNt->apMdls[0]);
131	pMemNt->apMdls[0] = NULL;
132	pMemNt->cMdls = 0;
133	break;
134
135	case RTR0MEMOBJTYPE_PHYS:
136	case RTR0MEMOBJTYPE_PHYS_NC:
137	#ifndef IPRT_TARGET_NT4
138	if (pMemNt->fAllocatedPagesForMdl)
139	{
140	MmFreePagesFromMdl(pMemNt->apMdls[0]);
141	ExFreePool(pMemNt->apMdls[0]);
142	pMemNt->apMdls[0] = NULL;
143	pMemNt->cMdls = 0;
144	break;
145	}
146	#endif
147	AssertFailed();
148	break;
149
150	case RTR0MEMOBJTYPE_LOCK:
151	if (pMemNt->pvSecureMem)
152	{
153	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
154	pMemNt->pvSecureMem = NULL;
155	}
156	for (uint32_t i = 0; i < pMemNt->cMdls; i++)
157	{
158	MmUnlockPages(pMemNt->apMdls[i]);
159	IoFreeMdl(pMemNt->apMdls[i]);
160	pMemNt->apMdls[i] = NULL;
161	}
162	break;
163
164	case RTR0MEMOBJTYPE_RES_VIRT:
165	/* if (pMemNt->Core.u.ResVirt.R0Process == NIL_RTR0PROCESS)
166	{
167	}
168	else
169	{
170	}*/
171	AssertMsgFailed(("RTR0MEMOBJTYPE_RES_VIRT\n"));
172	return VERR_INTERNAL_ERROR;
173	break;
174
175	case RTR0MEMOBJTYPE_MAPPING:
176	{
177	Assert(pMemNt->cMdls == 0 && pMemNt->Core.pv);
178	PRTR0MEMOBJNT pMemNtParent = (PRTR0MEMOBJNT)pMemNt->Core.uRel.Child.pParent;
179	Assert(pMemNtParent);
180	if (pMemNtParent->cMdls)
181	{
182	Assert(pMemNtParent->cMdls == 1 && pMemNtParent->apMdls[0]);
183	Assert( pMemNt->Core.u.Mapping.R0Process == NIL_RTR0PROCESS
184	\|\| pMemNt->Core.u.Mapping.R0Process == RTR0ProcHandleSelf());
185	MmUnmapLockedPages(pMemNt->Core.pv, pMemNtParent->apMdls[0]);
186	}
187	else
188	{
189	Assert( pMemNtParent->Core.enmType == RTR0MEMOBJTYPE_PHYS
190	&& !pMemNtParent->Core.u.Phys.fAllocated);
191	Assert(pMemNt->Core.u.Mapping.R0Process == NIL_RTR0PROCESS);
192	MmUnmapIoSpace(pMemNt->Core.pv, pMemNt->Core.cb);
193	}
194	pMemNt->Core.pv = NULL;
195	break;
196	}
197
198	default:
199	AssertMsgFailed(("enmType=%d\n", pMemNt->Core.enmType));
200	return VERR_INTERNAL_ERROR;
201	}
202
203	return VINF_SUCCESS;
204	}
205
206
207	int rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
208	{
209	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
210
211	/*
212	* Try allocate the memory and create an MDL for them so
213	* we can query the physical addresses and do mappings later
214	* without running into out-of-memory conditions and similar problems.
215	*/
216	int rc = VERR_NO_PAGE_MEMORY;
217	void *pv = ExAllocatePoolWithTag(NonPagedPool, cb, IPRT_NT_POOL_TAG);
218	if (pv)
219	{
220	PMDL pMdl = IoAllocateMdl(pv, (ULONG)cb, FALSE, FALSE, NULL);
221	if (pMdl)
222	{
223	MmBuildMdlForNonPagedPool(pMdl);
224	#ifdef RT_ARCH_AMD64
225	MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE);
226	#endif
227
228	/*
229	* Create the IPRT memory object.
230	*/
231	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PAGE, pv, cb);
232	if (pMemNt)
233	{
234	pMemNt->cMdls = 1;
235	pMemNt->apMdls[0] = pMdl;
236	*ppMem = &pMemNt->Core;
237	return VINF_SUCCESS;
238	}
239
240	rc = VERR_NO_MEMORY;
241	IoFreeMdl(pMdl);
242	}
243	ExFreePool(pv);
244	}
245	return rc;
246	}
247
248
249	int rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
250	{
251	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
252
253	/*
254	* Try see if we get lucky first...
255	* (We could probably just assume we're lucky on NT4.)
256	*/
257	int rc = rtR0MemObjNativeAllocPage(ppMem, cb, fExecutable);
258	if (RT_SUCCESS(rc))
259	{
260	size_t iPage = cb >> PAGE_SHIFT;
261	while (iPage-- > 0)
262	if (rtR0MemObjNativeGetPagePhysAddr(*ppMem, iPage) >= _4G)
263	{
264	rc = VERR_NO_MEMORY;
265	break;
266	}
267	if (RT_SUCCESS(rc))
268	return rc;
269
270	/* The following ASSUMES that rtR0MemObjNativeAllocPage returns a completed object. */
271	RTR0MemObjFree(*ppMem, false);
272	*ppMem = NULL;
273	}
274
275	#ifndef IPRT_TARGET_NT4
276	/*
277	* Use MmAllocatePagesForMdl to specify the range of physical addresses we wish to use.
278	*/
279	PHYSICAL_ADDRESS Zero;
280	Zero.QuadPart = 0;
281	PHYSICAL_ADDRESS HighAddr;
282	HighAddr.QuadPart = _4G - 1;
283	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
284	if (pMdl)
285	{
286	if (MmGetMdlByteCount(pMdl) >= cb)
287	{
288	__try
289	{
290	void pv = MmMapLockedPagesSpecifyCache(pMdl, KernelMode, MmCached, NULL / no base address */,
291	FALSE /* no bug check on failure */, NormalPagePriority);
292	if (pv)
293	{
294	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_LOW, pv, cb);
295	if (pMemNt)
296	{
297	pMemNt->fAllocatedPagesForMdl = true;
298	pMemNt->cMdls = 1;
299	pMemNt->apMdls[0] = pMdl;
300	*ppMem = &pMemNt->Core;
301	return VINF_SUCCESS;
302	}
303	MmUnmapLockedPages(pv, pMdl);
304	}
305	}
306	__except(EXCEPTION_EXECUTE_HANDLER)
307	{
308	NTSTATUS rcNt = GetExceptionCode();
309	Log(("rtR0MemObjNativeAllocLow: Exception Code %#x\n", rcNt));
310	/* nothing */
311	}
312	}
313	MmFreePagesFromMdl(pMdl);
314	ExFreePool(pMdl);
315	}
316	#endif /* !IPRT_TARGET_NT4 */
317
318	/*
319	* Fall back on contiguous memory...
320	*/
321	return rtR0MemObjNativeAllocCont(ppMem, cb, fExecutable);
322	}
323
324
325	/**
326	* Internal worker for rtR0MemObjNativeAllocCont(), rtR0MemObjNativeAllocPhys()
327	* and rtR0MemObjNativeAllocPhysNC() that takes a max physical address in addition
328	* to what rtR0MemObjNativeAllocCont() does.
329	*
330	* @returns IPRT status code.
331	* @param ppMem Where to store the pointer to the ring-0 memory object.
332	* @param cb The size.
333	* @param fExecutable Whether the mapping should be executable or not.
334	* @param PhysHighest The highest physical address for the pages in allocation.
335	* @param uAlignment The alignment of the physical memory to allocate.
336	* Supported values are PAGE_SIZE, _2M, _4M and _1G.
337	*/
338	static int rtR0MemObjNativeAllocContEx(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable, RTHCPHYS PhysHighest,
339	size_t uAlignment)
340	{
341	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
342	#ifdef TARGET_NT4
343	if (uAlignment != PAGE_SIZE)
344	return VERR_NOT_SUPPORTED;
345	#endif
346
347	/*
348	* Allocate the memory and create an MDL for it.
349	*/
350	PHYSICAL_ADDRESS PhysAddrHighest;
351	PhysAddrHighest.QuadPart = PhysHighest;
352	#ifndef TARGET_NT4
353	PHYSICAL_ADDRESS PhysAddrLowest, PhysAddrBoundary;
354	PhysAddrLowest.QuadPart = 0;
355	PhysAddrBoundary.QuadPart = (uAlignment == PAGE_SIZE) ? 0 : uAlignment;
356	void *pv = MmAllocateContiguousMemorySpecifyCache(cb, PhysAddrLowest, PhysAddrHighest, PhysAddrBoundary, MmCached);
357	#else
358	void *pv = MmAllocateContiguousMemory(cb, PhysAddrHighest);
359	#endif
360	if (!pv)
361	return VERR_NO_MEMORY;
362
363	PMDL pMdl = IoAllocateMdl(pv, (ULONG)cb, FALSE, FALSE, NULL);
364	if (pMdl)
365	{
366	MmBuildMdlForNonPagedPool(pMdl);
367	#ifdef RT_ARCH_AMD64
368	MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE);
369	#endif
370
371	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_CONT, pv, cb);
372	if (pMemNt)
373	{
374	pMemNt->Core.u.Cont.Phys = (RTHCPHYS)*MmGetMdlPfnArray(pMdl) << PAGE_SHIFT;
375	pMemNt->cMdls = 1;
376	pMemNt->apMdls[0] = pMdl;
377	*ppMem = &pMemNt->Core;
378	return VINF_SUCCESS;
379	}
380
381	IoFreeMdl(pMdl);
382	}
383	MmFreeContiguousMemory(pv);
384	return VERR_NO_MEMORY;
385	}
386
387
388	int rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
389	{
390	return rtR0MemObjNativeAllocContEx(ppMem, cb, fExecutable, _4G-1, PAGE_SIZE /* alignment */);
391	}
392
393
394	int rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
395	{
396	#ifndef IPRT_TARGET_NT4
397	/*
398	* Try and see if we're lucky and get a contiguous chunk from MmAllocatePagesForMdl.
399	*
400	* This is preferable to using MmAllocateContiguousMemory because there are
401	* a few situations where the memory shouldn't be mapped, like for instance
402	* VT-x control memory. Since these are rather small allocations (one or
403	* two pages) MmAllocatePagesForMdl will probably be able to satisfy the
404	* request.
405	*
406	* If the allocation is big, the chances are probably not very good. The
407	* current limit is kind of random...
408	*/
409	if ( cb < _128K
410	&& uAlignment == PAGE_SIZE)
411
412	{
413	PHYSICAL_ADDRESS Zero;
414	Zero.QuadPart = 0;
415	PHYSICAL_ADDRESS HighAddr;
416	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
417	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
418	if (pMdl)
419	{
420	if (MmGetMdlByteCount(pMdl) >= cb)
421	{
422	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMdl);
423	PFN_NUMBER Pfn = paPfns[0] + 1;
424	const size_t cPages = cb >> PAGE_SHIFT;
425	size_t iPage;
426	for (iPage = 1; iPage < cPages; iPage++, Pfn++)
427	if (paPfns[iPage] != Pfn)
428	break;
429	if (iPage >= cPages)
430	{
431	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
432	if (pMemNt)
433	{
434	pMemNt->Core.u.Phys.fAllocated = true;
435	pMemNt->Core.u.Phys.PhysBase = (RTHCPHYS)paPfns[0] << PAGE_SHIFT;
436	pMemNt->fAllocatedPagesForMdl = true;
437	pMemNt->cMdls = 1;
438	pMemNt->apMdls[0] = pMdl;
439	*ppMem = &pMemNt->Core;
440	return VINF_SUCCESS;
441	}
442	}
443	}
444	MmFreePagesFromMdl(pMdl);
445	ExFreePool(pMdl);
446	}
447	}
448	#endif /* !IPRT_TARGET_NT4 */
449
450	return rtR0MemObjNativeAllocContEx(ppMem, cb, false, PhysHighest, uAlignment);
451	}
452
453
454	int rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
455	{
456	#ifndef IPRT_TARGET_NT4
457	PHYSICAL_ADDRESS Zero;
458	Zero.QuadPart = 0;
459	PHYSICAL_ADDRESS HighAddr;
460	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
461	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
462	if (pMdl)
463	{
464	if (MmGetMdlByteCount(pMdl) >= cb)
465	{
466	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS_NC, NULL, cb);
467	if (pMemNt)
468	{
469	pMemNt->fAllocatedPagesForMdl = true;
470	pMemNt->cMdls = 1;
471	pMemNt->apMdls[0] = pMdl;
472	*ppMem = &pMemNt->Core;
473	return VINF_SUCCESS;
474	}
475	}
476	MmFreePagesFromMdl(pMdl);
477	ExFreePool(pMdl);
478	}
479	return VERR_NO_MEMORY;
480	#else /* IPRT_TARGET_NT4 */
481	return VERR_NOT_SUPPORTED;
482	#endif /* IPRT_TARGET_NT4 */
483	}
484
485
486	int rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb, unsigned CachePolicy)
487	{
488	AssertReturn(CachePolicy == RTMEM_CACHE_POLICY_DONT_CARE, VERR_NOT_IMPLEMENTED);
489
490	/*
491	* Validate the address range and create a descriptor for it.
492	*/
493	PFN_NUMBER Pfn = (PFN_NUMBER)(Phys >> PAGE_SHIFT);
494	if (((RTHCPHYS)Pfn << PAGE_SHIFT) != Phys)
495	return VERR_ADDRESS_TOO_BIG;
496
497	/*
498	* Create the IPRT memory object.
499	*/
500	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
501	if (pMemNt)
502	{
503	pMemNt->Core.u.Phys.PhysBase = Phys;
504	pMemNt->Core.u.Phys.fAllocated = false;
505	*ppMem = &pMemNt->Core;
506	return VINF_SUCCESS;
507	}
508	return VERR_NO_MEMORY;
509	}
510
511
512	/**
513	* Internal worker for locking down pages.
514	*
515	* @return IPRT status code.
516	*
517	* @param ppMem Where to store the memory object pointer.
518	* @param pv First page.
519	* @param cb Number of bytes.
520	* @param fAccess The desired access, a combination of RTMEM_PROT_READ
521	* and RTMEM_PROT_WRITE.
522	* @param R0Process The process \a pv and \a cb refers to.
523	*/
524	static int rtR0MemObjNtLock(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
525	{
526	/*
527	* Calc the number of MDLs we need and allocate the memory object structure.
528	*/
529	size_t cMdls = cb / MAX_LOCK_MEM_SIZE;
530	if (cb % MAX_LOCK_MEM_SIZE)
531	cMdls++;
532	if (cMdls >= UINT32_MAX)
533	return VERR_OUT_OF_RANGE;
534	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJNT, apMdls[cMdls]),
535	RTR0MEMOBJTYPE_LOCK, pv, cb);
536	if (!pMemNt)
537	return VERR_NO_MEMORY;
538
539	/*
540	* Loop locking down the sub parts of the memory.
541	*/
542	int rc = VINF_SUCCESS;
543	size_t cbTotal = 0;
544	uint8_t pb = (uint8_t )pv;
545	uint32_t iMdl;
546	for (iMdl = 0; iMdl < cMdls; iMdl++)
547	{
548	/*
549	* Calc the Mdl size and allocate it.
550	*/
551	size_t cbCur = cb - cbTotal;
552	if (cbCur > MAX_LOCK_MEM_SIZE)
553	cbCur = MAX_LOCK_MEM_SIZE;
554	AssertMsg(cbCur, ("cbCur: 0!\n"));
555	PMDL pMdl = IoAllocateMdl(pb, (ULONG)cbCur, FALSE, FALSE, NULL);
556	if (!pMdl)
557	{
558	rc = VERR_NO_MEMORY;
559	break;
560	}
561
562	/*
563	* Lock the pages.
564	*/
565	__try
566	{
567	MmProbeAndLockPages(pMdl,
568	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode,
569	fAccess == RTMEM_PROT_READ
570	? IoReadAccess
571	: fAccess == RTMEM_PROT_WRITE
572	? IoWriteAccess
573	: IoModifyAccess);
574
575	pMemNt->apMdls[iMdl] = pMdl;
576	pMemNt->cMdls++;
577	}
578	__except(EXCEPTION_EXECUTE_HANDLER)
579	{
580	IoFreeMdl(pMdl);
581	rc = VERR_LOCK_FAILED;
582	break;
583	}
584
585	if (R0Process != NIL_RTR0PROCESS)
586	{
587	/* Make sure the user process can't change the allocation. */
588	pMemNt->pvSecureMem = MmSecureVirtualMemory(pv, cb,
589	fAccess & RTMEM_PROT_WRITE
590	? PAGE_READWRITE
591	: PAGE_READONLY);
592	if (!pMemNt->pvSecureMem)
593	{
594	rc = VERR_NO_MEMORY;
595	break;
596	}
597	}
598
599	/* next */
600	cbTotal += cbCur;
601	pb += cbCur;
602	}
603	if (RT_SUCCESS(rc))
604	{
605	Assert(pMemNt->cMdls == cMdls);
606	pMemNt->Core.u.Lock.R0Process = R0Process;
607	*ppMem = &pMemNt->Core;
608	return rc;
609	}
610
611	/*
612	* We failed, perform cleanups.
613	*/
614	while (iMdl-- > 0)
615	{
616	MmUnlockPages(pMemNt->apMdls[iMdl]);
617	IoFreeMdl(pMemNt->apMdls[iMdl]);
618	pMemNt->apMdls[iMdl] = NULL;
619	}
620	if (pMemNt->pvSecureMem)
621	{
622	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
623	pMemNt->pvSecureMem = NULL;
624	}
625
626	rtR0MemObjDelete(&pMemNt->Core);
627	return rc;
628	}
629
630
631	int rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
632	{
633	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
634	/* (Can use MmProbeAndLockProcessPages if we need to mess with other processes later.) */
635	return rtR0MemObjNtLock(ppMem, (void *)R3Ptr, cb, fAccess, R0Process);
636	}
637
638
639	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
640	{
641	return rtR0MemObjNtLock(ppMem, pv, cb, fAccess, NIL_RTR0PROCESS);
642	}
643
644
645	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
646	{
647	/*
648	* MmCreateSection(SEC_RESERVE) + MmMapViewInSystemSpace perhaps?
649	*/
650	return VERR_NOT_IMPLEMENTED;
651	}
652
653
654	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
655	{
656	/*
657	* ZeCreateSection(SEC_RESERVE) + ZwMapViewOfSection perhaps?
658	*/
659	return VERR_NOT_IMPLEMENTED;
660	}
661
662
663	/**
664	* Internal worker for rtR0MemObjNativeMapKernel and rtR0MemObjNativeMapUser.
665	*
666	* @returns IPRT status code.
667	* @param ppMem Where to store the memory object for the mapping.
668	* @param pMemToMap The memory object to map.
669	* @param pvFixed Where to map it. (void *)-1 if anywhere is fine.
670	* @param uAlignment The alignment requirement for the mapping.
671	* @param fProt The desired page protection for the mapping.
672	* @param R0Process If NIL_RTR0PROCESS map into system (kernel) memory.
673	* If not nil, it's the current process.
674	*/
675	static int rtR0MemObjNtMap(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
676	unsigned fProt, RTR0PROCESS R0Process)
677	{
678	int rc = VERR_MAP_FAILED;
679
680	/*
681	* Check that the specified alignment is supported.
682	*/
683	if (uAlignment > PAGE_SIZE)
684	return VERR_NOT_SUPPORTED;
685
686	/*
687	* There are two basic cases here, either we've got an MDL and can
688	* map it using MmMapLockedPages, or we've got a contiguous physical
689	* range (MMIO most likely) and can use MmMapIoSpace.
690	*/
691	PRTR0MEMOBJNT pMemNtToMap = (PRTR0MEMOBJNT)pMemToMap;
692	if (pMemNtToMap->cMdls)
693	{
694	/* don't attempt map locked regions with more than one mdl. */
695	if (pMemNtToMap->cMdls != 1)
696	return VERR_NOT_SUPPORTED;
697
698	#ifdef IPRT_TARGET_NT4
699	/* NT SP0 can't map to a specific address. */
700	if (pvFixed != (void *)-1)
701	return VERR_NOT_SUPPORTED;
702	#endif
703
704	/* we can't map anything to the first page, sorry. */
705	if (pvFixed == 0)
706	return VERR_NOT_SUPPORTED;
707
708	/* only one system mapping for now - no time to figure out MDL restrictions right now. */
709	if ( pMemNtToMap->Core.uRel.Parent.cMappings
710	&& R0Process == NIL_RTR0PROCESS)
711	return VERR_NOT_SUPPORTED;
712
713	__try
714	{
715	/** @todo uAlignment */
716	/** @todo How to set the protection on the pages? */
717	#ifdef IPRT_TARGET_NT4
718	void *pv = MmMapLockedPages(pMemNtToMap->apMdls[0],
719	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode);
720	#else
721	void *pv = MmMapLockedPagesSpecifyCache(pMemNtToMap->apMdls[0],
722	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode,
723	MmCached,
724	pvFixed != (void *)-1 ? pvFixed : NULL,
725	FALSE /* no bug check on failure */,
726	NormalPagePriority);
727	#endif
728	if (pv)
729	{
730	NOREF(fProt);
731
732	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
733	pMemNtToMap->Core.cb);
734	if (pMemNt)
735	{
736	pMemNt->Core.u.Mapping.R0Process = R0Process;
737	*ppMem = &pMemNt->Core;
738	return VINF_SUCCESS;
739	}
740
741	rc = VERR_NO_MEMORY;
742	MmUnmapLockedPages(pv, pMemNtToMap->apMdls[0]);
743	}
744	}
745	__except(EXCEPTION_EXECUTE_HANDLER)
746	{
747	NTSTATUS rcNt = GetExceptionCode();
748	Log(("rtR0MemObjNtMap: Exception Code %#x\n", rcNt));
749
750	/* nothing */
751	rc = VERR_MAP_FAILED;
752	}
753
754	}
755	else
756	{
757	AssertReturn( pMemNtToMap->Core.enmType == RTR0MEMOBJTYPE_PHYS
758	&& !pMemNtToMap->Core.u.Phys.fAllocated, VERR_INTERNAL_ERROR);
759
760	/* cannot map phys mem to user space (yet). */
761	if (R0Process != NIL_RTR0PROCESS)
762	return VERR_NOT_SUPPORTED;
763
764	/** @todo uAlignment */
765	/** @todo How to set the protection on the pages? */
766	PHYSICAL_ADDRESS Phys;
767	Phys.QuadPart = pMemNtToMap->Core.u.Phys.PhysBase;
768	void pv = MmMapIoSpace(Phys, pMemNtToMap->Core.cb, MmCached); /* @todo add cache type to fProt. */
769	if (pv)
770	{
771	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
772	pMemNtToMap->Core.cb);
773	if (pMemNt)
774	{
775	pMemNt->Core.u.Mapping.R0Process = R0Process;
776	*ppMem = &pMemNt->Core;
777	return VINF_SUCCESS;
778	}
779
780	rc = VERR_NO_MEMORY;
781	MmUnmapIoSpace(pv, pMemNtToMap->Core.cb);
782	}
783	}
784
785	NOREF(uAlignment); NOREF(fProt);
786	return rc;
787	}
788
789
790	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
791	unsigned fProt, size_t offSub, size_t cbSub)
792	{
793	AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
794	return rtR0MemObjNtMap(ppMem, pMemToMap, pvFixed, uAlignment, fProt, NIL_RTR0PROCESS);
795	}
796
797
798	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
799	{
800	AssertReturn(R0Process == RTR0ProcHandleSelf(), VERR_NOT_SUPPORTED);
801	return rtR0MemObjNtMap(ppMem, pMemToMap, (void *)R3PtrFixed, uAlignment, fProt, R0Process);
802	}
803
804
805	int rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
806	{
807	NOREF(pMem);
808	NOREF(offSub);
809	NOREF(cbSub);
810	NOREF(fProt);
811	return VERR_NOT_SUPPORTED;
812	}
813
814
815	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
816	{
817	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)pMem;
818
819	if (pMemNt->cMdls)
820	{
821	if (pMemNt->cMdls == 1)
822	{
823	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[0]);
824	return (RTHCPHYS)paPfns[iPage] << PAGE_SHIFT;
825	}
826
827	size_t iMdl = iPage / (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
828	size_t iMdlPfn = iPage % (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
829	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[iMdl]);
830	return (RTHCPHYS)paPfns[iMdlPfn] << PAGE_SHIFT;
831	}
832
833	switch (pMemNt->Core.enmType)
834	{
835	case RTR0MEMOBJTYPE_MAPPING:
836	return rtR0MemObjNativeGetPagePhysAddr(pMemNt->Core.uRel.Child.pParent, iPage);
837
838	case RTR0MEMOBJTYPE_PHYS:
839	return pMemNt->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
840
841	case RTR0MEMOBJTYPE_PAGE:
842	case RTR0MEMOBJTYPE_PHYS_NC:
843	case RTR0MEMOBJTYPE_LOW:
844	case RTR0MEMOBJTYPE_CONT:
845	case RTR0MEMOBJTYPE_LOCK:
846	default:
847	AssertMsgFailed(("%d\n", pMemNt->Core.enmType));
848	case RTR0MEMOBJTYPE_RES_VIRT:
849	return NIL_RTHCPHYS;
850	}
851	}
852

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source: vbox/trunk/src/VBox/Runtime/r0drv/nt/memobj-r0drv-nt.cpp@ 28800

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