memobj-r0drv-nt.cpp@ 26430

Last change on this file since 26430 was 26430, checked in by vboxsync, 15 years ago
Introducing RTR0MemObjAllocPhysEx
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File size: 28.1 KB

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1	/* $Id: memobj-r0drv-nt.cpp 26430 2010-02-11 14:23:01Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, NT.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
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	* 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	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
27	* Clara, CA 95054 USA or visit http://www.sun.com if you need
28	* additional information or have any questions.
29	*/
30
31
32	/*******************************************************************************
33	* Header Files *
34	*******************************************************************************/
35	#include "the-nt-kernel.h"
36
37	#include <iprt/memobj.h>
38	#include <iprt/alloc.h>
39	#include <iprt/assert.h>
40	#include <iprt/log.h>
41	#include <iprt/param.h>
42	#include <iprt/string.h>
43	#include <iprt/process.h>
44	#include "internal/memobj.h"
45
46
47	/*******************************************************************************
48	* Defined Constants And Macros *
49	*******************************************************************************/
50	/** Maximum number of bytes we try to lock down in one go.
51	* This is supposed to have a limit right below 256MB, but this appears
52	* to actually be much lower. The values here have been determined experimentally.
53	*/
54	#ifdef RT_ARCH_X86
55	# define MAX_LOCK_MEM_SIZE (3210241024) /* 32MB */
56	#endif
57	#ifdef RT_ARCH_AMD64
58	# define MAX_LOCK_MEM_SIZE (2410241024) /* 24MB */
59	#endif
60
61
62	/*******************************************************************************
63	* Structures and Typedefs *
64	*******************************************************************************/
65	/**
66	* The NT version of the memory object structure.
67	*/
68	typedef struct RTR0MEMOBJNT
69	{
70	/** The core structure. */
71	RTR0MEMOBJINTERNAL Core;
72	#ifndef IPRT_TARGET_NT4
73	/** Used MmAllocatePagesForMdl(). */
74	bool fAllocatedPagesForMdl;
75	#endif
76	/** Pointer returned by MmSecureVirtualMemory */
77	PVOID pvSecureMem;
78	/** The number of PMDLs (memory descriptor lists) in the array. */
79	uint32_t cMdls;
80	/** Array of MDL pointers. (variable size) */
81	PMDL apMdls[1];
82	} RTR0MEMOBJNT, *PRTR0MEMOBJNT;
83
84
85	int rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
86	{
87	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)pMem;
88
89	/*
90	* Deal with it on a per type basis (just as a variation).
91	*/
92	switch (pMemNt->Core.enmType)
93	{
94	case RTR0MEMOBJTYPE_LOW:
95	#ifndef IPRT_TARGET_NT4
96	if (pMemNt->fAllocatedPagesForMdl)
97	{
98	Assert(pMemNt->Core.pv && pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
99	MmUnmapLockedPages(pMemNt->Core.pv, pMemNt->apMdls[0]);
100	pMemNt->Core.pv = NULL;
101	if (pMemNt->pvSecureMem)
102	{
103	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
104	pMemNt->pvSecureMem = NULL;
105	}
106
107	MmFreePagesFromMdl(pMemNt->apMdls[0]);
108	ExFreePool(pMemNt->apMdls[0]);
109	pMemNt->apMdls[0] = NULL;
110	pMemNt->cMdls = 0;
111	break;
112	}
113	#endif
114	AssertFailed();
115	break;
116
117	case RTR0MEMOBJTYPE_PAGE:
118	Assert(pMemNt->Core.pv);
119	ExFreePool(pMemNt->Core.pv);
120	pMemNt->Core.pv = NULL;
121
122	Assert(pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
123	IoFreeMdl(pMemNt->apMdls[0]);
124	pMemNt->apMdls[0] = NULL;
125	pMemNt->cMdls = 0;
126	break;
127
128	case RTR0MEMOBJTYPE_CONT:
129	Assert(pMemNt->Core.pv);
130	MmFreeContiguousMemory(pMemNt->Core.pv);
131	pMemNt->Core.pv = NULL;
132
133	Assert(pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
134	IoFreeMdl(pMemNt->apMdls[0]);
135	pMemNt->apMdls[0] = NULL;
136	pMemNt->cMdls = 0;
137	break;
138
139	case RTR0MEMOBJTYPE_PHYS:
140	case RTR0MEMOBJTYPE_PHYS_NC:
141	#ifndef IPRT_TARGET_NT4
142	if (pMemNt->fAllocatedPagesForMdl)
143	{
144	MmFreePagesFromMdl(pMemNt->apMdls[0]);
145	ExFreePool(pMemNt->apMdls[0]);
146	pMemNt->apMdls[0] = NULL;
147	pMemNt->cMdls = 0;
148	break;
149	}
150	#endif
151	AssertFailed();
152	break;
153
154	case RTR0MEMOBJTYPE_LOCK:
155	if (pMemNt->pvSecureMem)
156	{
157	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
158	pMemNt->pvSecureMem = NULL;
159	}
160	for (uint32_t i = 0; i < pMemNt->cMdls; i++)
161	{
162	MmUnlockPages(pMemNt->apMdls[i]);
163	IoFreeMdl(pMemNt->apMdls[i]);
164	pMemNt->apMdls[i] = NULL;
165	}
166	break;
167
168	case RTR0MEMOBJTYPE_RES_VIRT:
169	/* if (pMemNt->Core.u.ResVirt.R0Process == NIL_RTR0PROCESS)
170	{
171	}
172	else
173	{
174	}*/
175	AssertMsgFailed(("RTR0MEMOBJTYPE_RES_VIRT\n"));
176	return VERR_INTERNAL_ERROR;
177	break;
178
179	case RTR0MEMOBJTYPE_MAPPING:
180	{
181	Assert(pMemNt->cMdls == 0 && pMemNt->Core.pv);
182	PRTR0MEMOBJNT pMemNtParent = (PRTR0MEMOBJNT)pMemNt->Core.uRel.Child.pParent;
183	Assert(pMemNtParent);
184	if (pMemNtParent->cMdls)
185	{
186	Assert(pMemNtParent->cMdls == 1 && pMemNtParent->apMdls[0]);
187	Assert( pMemNt->Core.u.Mapping.R0Process == NIL_RTR0PROCESS
188	\|\| pMemNt->Core.u.Mapping.R0Process == RTR0ProcHandleSelf());
189	MmUnmapLockedPages(pMemNt->Core.pv, pMemNtParent->apMdls[0]);
190	}
191	else
192	{
193	Assert( pMemNtParent->Core.enmType == RTR0MEMOBJTYPE_PHYS
194	&& !pMemNtParent->Core.u.Phys.fAllocated);
195	Assert(pMemNt->Core.u.Mapping.R0Process == NIL_RTR0PROCESS);
196	MmUnmapIoSpace(pMemNt->Core.pv, pMemNt->Core.cb);
197	}
198	pMemNt->Core.pv = NULL;
199	break;
200	}
201
202	default:
203	AssertMsgFailed(("enmType=%d\n", pMemNt->Core.enmType));
204	return VERR_INTERNAL_ERROR;
205	}
206
207	return VINF_SUCCESS;
208	}
209
210
211	int rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
212	{
213	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
214
215	/*
216	* Try allocate the memory and create an MDL for them so
217	* we can query the physical addresses and do mappings later
218	* without running into out-of-memory conditions and similar problems.
219	*/
220	int rc = VERR_NO_PAGE_MEMORY;
221	void *pv = ExAllocatePoolWithTag(NonPagedPool, cb, IPRT_NT_POOL_TAG);
222	if (pv)
223	{
224	PMDL pMdl = IoAllocateMdl(pv, (ULONG)cb, FALSE, FALSE, NULL);
225	if (pMdl)
226	{
227	MmBuildMdlForNonPagedPool(pMdl);
228	#ifdef RT_ARCH_AMD64
229	MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE);
230	#endif
231
232	/*
233	* Create the IPRT memory object.
234	*/
235	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PAGE, pv, cb);
236	if (pMemNt)
237	{
238	pMemNt->cMdls = 1;
239	pMemNt->apMdls[0] = pMdl;
240	*ppMem = &pMemNt->Core;
241	return VINF_SUCCESS;
242	}
243
244	rc = VERR_NO_MEMORY;
245	IoFreeMdl(pMdl);
246	}
247	ExFreePool(pv);
248	}
249	return rc;
250	}
251
252
253	int rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
254	{
255	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
256
257	/*
258	* Try see if we get lucky first...
259	* (We could probably just assume we're lucky on NT4.)
260	*/
261	int rc = rtR0MemObjNativeAllocPage(ppMem, cb, fExecutable);
262	if (RT_SUCCESS(rc))
263	{
264	size_t iPage = cb >> PAGE_SHIFT;
265	while (iPage-- > 0)
266	if (rtR0MemObjNativeGetPagePhysAddr(*ppMem, iPage) >= _4G)
267	{
268	rc = VERR_NO_MEMORY;
269	break;
270	}
271	if (RT_SUCCESS(rc))
272	return rc;
273
274	/* The following ASSUMES that rtR0MemObjNativeAllocPage returns a completed object. */
275	RTR0MemObjFree(*ppMem, false);
276	*ppMem = NULL;
277	}
278
279	#ifndef IPRT_TARGET_NT4
280	/*
281	* Use MmAllocatePagesForMdl to specify the range of physical addresses we wish to use.
282	*/
283	PHYSICAL_ADDRESS Zero;
284	Zero.QuadPart = 0;
285	PHYSICAL_ADDRESS HighAddr;
286	HighAddr.QuadPart = _4G - 1;
287	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
288	if (pMdl)
289	{
290	if (MmGetMdlByteCount(pMdl) >= cb)
291	{
292	__try
293	{
294	void pv = MmMapLockedPagesSpecifyCache(pMdl, KernelMode, MmCached, NULL / no base address */,
295	FALSE /* no bug check on failure */, NormalPagePriority);
296	if (pv)
297	{
298	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_LOW, pv, cb);
299	if (pMemNt)
300	{
301	pMemNt->fAllocatedPagesForMdl = true;
302	pMemNt->cMdls = 1;
303	pMemNt->apMdls[0] = pMdl;
304	*ppMem = &pMemNt->Core;
305	return VINF_SUCCESS;
306	}
307	MmUnmapLockedPages(pv, pMdl);
308	}
309	}
310	__except(EXCEPTION_EXECUTE_HANDLER)
311	{
312	NTSTATUS rcNt = GetExceptionCode();
313	Log(("rtR0MemObjNativeAllocLow: Exception Code %#x\n", rcNt));
314	/* nothing */
315	}
316	}
317	MmFreePagesFromMdl(pMdl);
318	ExFreePool(pMdl);
319	}
320	#endif /* !IPRT_TARGET_NT4 */
321
322	/*
323	* Fall back on contiguous memory...
324	*/
325	return rtR0MemObjNativeAllocCont(ppMem, cb, fExecutable);
326	}
327
328
329	/**
330	* Internal worker for rtR0MemObjNativeAllocCont(), rtR0MemObjNativeAllocPhys()
331	* and rtR0MemObjNativeAllocPhysNC() that takes a max physical address in addition
332	* to what rtR0MemObjNativeAllocCont() does.
333	*
334	* @returns IPRT status code.
335	* @param ppMem Where to store the pointer to the ring-0 memory object.
336	* @param cb The size.
337	* @param fExecutable Whether the mapping should be executable or not.
338	* @param PhysHighest The highest physical address for the pages in allocation.
339	* @param uAlignment The alignment of the physical memory to allocate.
340	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M, _4M and _1G.
341	*/
342	static int rtR0MemObjNativeAllocContEx(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable, RTHCPHYS PhysHighest, size_t uAlignment)
343	{
344	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
345
346	/* @todo */
347	if ( uAlignment != 0
348	&& uAlignment != PAGE_SIZE)
349	return VERR_NOT_SUPPORTED;
350
351	/*
352	* Allocate the memory and create an MDL for it.
353	*/
354	PHYSICAL_ADDRESS PhysAddrHighest;
355	PhysAddrHighest.QuadPart = PhysHighest;
356	void *pv = MmAllocateContiguousMemory(cb, PhysAddrHighest);
357	if (!pv)
358	return VERR_NO_MEMORY;
359
360	PMDL pMdl = IoAllocateMdl(pv, (ULONG)cb, FALSE, FALSE, NULL);
361	if (pMdl)
362	{
363	MmBuildMdlForNonPagedPool(pMdl);
364	#ifdef RT_ARCH_AMD64
365	MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE);
366	#endif
367
368	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_CONT, pv, cb);
369	if (pMemNt)
370	{
371	pMemNt->Core.u.Cont.Phys = (RTHCPHYS)*MmGetMdlPfnArray(pMdl) << PAGE_SHIFT;
372	pMemNt->cMdls = 1;
373	pMemNt->apMdls[0] = pMdl;
374	*ppMem = &pMemNt->Core;
375	return VINF_SUCCESS;
376	}
377
378	IoFreeMdl(pMdl);
379	}
380	MmFreeContiguousMemory(pv);
381	return VERR_NO_MEMORY;
382	}
383
384
385	int rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
386	{
387	return rtR0MemObjNativeAllocContEx(ppMem, cb, fExecutable, _4G-1, PAGE_SIZE /* alignment */);
388	}
389
390
391	int rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
392	{
393	#ifndef IPRT_TARGET_NT4
394	/*
395	* Try and see if we're lucky and get a contiguous chunk from MmAllocatePagesForMdl.
396	*
397	* This is preferable to using MmAllocateContiguousMemory because there are
398	* a few situations where the memory shouldn't be mapped, like for instance
399	* VT-x control memory. Since these are rather small allocations (one or
400	* two pages) MmAllocatePagesForMdl will probably be able to satisfy the
401	* request.
402	*
403	* If the allocation is big, the chances are probably not very good. The
404	* current limit is kind of random...
405	*/
406	if (cb < _128K)
407	{
408	PHYSICAL_ADDRESS Zero;
409	Zero.QuadPart = 0;
410	PHYSICAL_ADDRESS HighAddr;
411	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
412	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
413	if (pMdl)
414	{
415	if (MmGetMdlByteCount(pMdl) >= cb)
416	{
417	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMdl);
418	PFN_NUMBER Pfn = paPfns[0] + 1;
419	const size_t cPages = cb >> PAGE_SHIFT;
420	size_t iPage;
421	for (iPage = 1; iPage < cPages; iPage++, Pfn++)
422	if (paPfns[iPage] != Pfn)
423	break;
424	if (iPage >= cPages)
425	{
426	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
427	if (pMemNt)
428	{
429	pMemNt->Core.u.Phys.fAllocated = true;
430	pMemNt->Core.u.Phys.PhysBase = (RTHCPHYS)paPfns[0] << PAGE_SHIFT;
431	pMemNt->fAllocatedPagesForMdl = true;
432	pMemNt->cMdls = 1;
433	pMemNt->apMdls[0] = pMdl;
434	*ppMem = &pMemNt->Core;
435	return VINF_SUCCESS;
436	}
437	}
438	}
439	MmFreePagesFromMdl(pMdl);
440	ExFreePool(pMdl);
441	}
442	}
443	#endif /* !IPRT_TARGET_NT4 */
444
445	return rtR0MemObjNativeAllocContEx(ppMem, cb, false, PhysHighest, uAlignment);
446	}
447
448
449	int rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
450	{
451	#ifndef IPRT_TARGET_NT4
452	PHYSICAL_ADDRESS Zero;
453	Zero.QuadPart = 0;
454	PHYSICAL_ADDRESS HighAddr;
455	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
456	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
457	if (pMdl)
458	{
459	if (MmGetMdlByteCount(pMdl) >= cb)
460	{
461	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS_NC, NULL, cb);
462	if (pMemNt)
463	{
464	pMemNt->fAllocatedPagesForMdl = true;
465	pMemNt->cMdls = 1;
466	pMemNt->apMdls[0] = pMdl;
467	*ppMem = &pMemNt->Core;
468	return VINF_SUCCESS;
469	}
470	}
471	MmFreePagesFromMdl(pMdl);
472	ExFreePool(pMdl);
473	}
474	return VERR_NO_MEMORY;
475	#else /* IPRT_TARGET_NT4 */
476	return VERR_NOT_SUPPORTED;
477	#endif /* IPRT_TARGET_NT4 */
478	}
479
480
481	int rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb)
482	{
483	/*
484	* Validate the address range and create a descriptor for it.
485	*/
486	PFN_NUMBER Pfn = (PFN_NUMBER)(Phys >> PAGE_SHIFT);
487	if (((RTHCPHYS)Pfn << PAGE_SHIFT) != Phys)
488	return VERR_ADDRESS_TOO_BIG;
489
490	/*
491	* Create the IPRT memory object.
492	*/
493	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
494	if (pMemNt)
495	{
496	pMemNt->Core.u.Phys.PhysBase = Phys;
497	pMemNt->Core.u.Phys.fAllocated = false;
498	*ppMem = &pMemNt->Core;
499	return VINF_SUCCESS;
500	}
501	return VERR_NO_MEMORY;
502	}
503
504
505	/**
506	* Internal worker for locking down pages.
507	*
508	* @return IPRT status code.
509	*
510	* @param ppMem Where to store the memory object pointer.
511	* @param pv First page.
512	* @param cb Number of bytes.
513	* @param fAccess The desired access, a combination of RTMEM_PROT_READ
514	* and RTMEM_PROT_WRITE.
515	* @param R0Process The process \a pv and \a cb refers to.
516	*/
517	static int rtR0MemObjNtLock(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
518	{
519	/*
520	* Calc the number of MDLs we need and allocate the memory object structure.
521	*/
522	size_t cMdls = cb / MAX_LOCK_MEM_SIZE;
523	if (cb % MAX_LOCK_MEM_SIZE)
524	cMdls++;
525	if (cMdls >= UINT32_MAX)
526	return VERR_OUT_OF_RANGE;
527	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJNT, apMdls[cMdls]),
528	RTR0MEMOBJTYPE_LOCK, pv, cb);
529	if (!pMemNt)
530	return VERR_NO_MEMORY;
531
532	/*
533	* Loop locking down the sub parts of the memory.
534	*/
535	int rc = VINF_SUCCESS;
536	size_t cbTotal = 0;
537	uint8_t pb = (uint8_t )pv;
538	uint32_t iMdl;
539	for (iMdl = 0; iMdl < cMdls; iMdl++)
540	{
541	/*
542	* Calc the Mdl size and allocate it.
543	*/
544	size_t cbCur = cb - cbTotal;
545	if (cbCur > MAX_LOCK_MEM_SIZE)
546	cbCur = MAX_LOCK_MEM_SIZE;
547	AssertMsg(cbCur, ("cbCur: 0!\n"));
548	PMDL pMdl = IoAllocateMdl(pb, (ULONG)cbCur, FALSE, FALSE, NULL);
549	if (!pMdl)
550	{
551	rc = VERR_NO_MEMORY;
552	break;
553	}
554
555	/*
556	* Lock the pages.
557	*/
558	__try
559	{
560	MmProbeAndLockPages(pMdl,
561	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode,
562	fAccess == RTMEM_PROT_READ
563	? IoReadAccess
564	: fAccess == RTMEM_PROT_WRITE
565	? IoWriteAccess
566	: IoModifyAccess);
567
568	pMemNt->apMdls[iMdl] = pMdl;
569	pMemNt->cMdls++;
570	}
571	__except(EXCEPTION_EXECUTE_HANDLER)
572	{
573	IoFreeMdl(pMdl);
574	rc = VERR_LOCK_FAILED;
575	break;
576	}
577
578	if (R0Process != NIL_RTR0PROCESS)
579	{
580	/* Make sure the user process can't change the allocation. */
581	pMemNt->pvSecureMem = MmSecureVirtualMemory(pv, cb,
582	fAccess & RTMEM_PROT_WRITE
583	? PAGE_READWRITE
584	: PAGE_READONLY);
585	if (!pMemNt->pvSecureMem)
586	{
587	rc = VERR_NO_MEMORY;
588	break;
589	}
590	}
591
592	/* next */
593	cbTotal += cbCur;
594	pb += cbCur;
595	}
596	if (RT_SUCCESS(rc))
597	{
598	Assert(pMemNt->cMdls == cMdls);
599	pMemNt->Core.u.Lock.R0Process = R0Process;
600	*ppMem = &pMemNt->Core;
601	return rc;
602	}
603
604	/*
605	* We failed, perform cleanups.
606	*/
607	while (iMdl-- > 0)
608	{
609	MmUnlockPages(pMemNt->apMdls[iMdl]);
610	IoFreeMdl(pMemNt->apMdls[iMdl]);
611	pMemNt->apMdls[iMdl] = NULL;
612	}
613	if (pMemNt->pvSecureMem)
614	{
615	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
616	pMemNt->pvSecureMem = NULL;
617	}
618
619	rtR0MemObjDelete(&pMemNt->Core);
620	return rc;
621	}
622
623
624	int rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
625	{
626	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
627	/* (Can use MmProbeAndLockProcessPages if we need to mess with other processes later.) */
628	return rtR0MemObjNtLock(ppMem, (void *)R3Ptr, cb, fAccess, R0Process);
629	}
630
631
632	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
633	{
634	return rtR0MemObjNtLock(ppMem, pv, cb, fAccess, NIL_RTR0PROCESS);
635	}
636
637
638	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
639	{
640	/*
641	* MmCreateSection(SEC_RESERVE) + MmMapViewInSystemSpace perhaps?
642	*/
643	return VERR_NOT_IMPLEMENTED;
644	}
645
646
647	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
648	{
649	/*
650	* ZeCreateSection(SEC_RESERVE) + ZwMapViewOfSection perhaps?
651	*/
652	return VERR_NOT_IMPLEMENTED;
653	}
654
655
656	/**
657	* Internal worker for rtR0MemObjNativeMapKernel and rtR0MemObjNativeMapUser.
658	*
659	* @returns IPRT status code.
660	* @param ppMem Where to store the memory object for the mapping.
661	* @param pMemToMap The memory object to map.
662	* @param pvFixed Where to map it. (void *)-1 if anywhere is fine.
663	* @param uAlignment The alignment requirement for the mapping.
664	* @param fProt The desired page protection for the mapping.
665	* @param R0Process If NIL_RTR0PROCESS map into system (kernel) memory.
666	* If not nil, it's the current process.
667	*/
668	static int rtR0MemObjNtMap(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
669	unsigned fProt, RTR0PROCESS R0Process)
670	{
671	int rc = VERR_MAP_FAILED;
672
673	/*
674	* Check that the specified alignment is supported.
675	*/
676	if (uAlignment > PAGE_SIZE)
677	return VERR_NOT_SUPPORTED;
678
679	/*
680	* There are two basic cases here, either we've got an MDL and can
681	* map it using MmMapLockedPages, or we've got a contiguous physical
682	* range (MMIO most likely) and can use MmMapIoSpace.
683	*/
684	PRTR0MEMOBJNT pMemNtToMap = (PRTR0MEMOBJNT)pMemToMap;
685	if (pMemNtToMap->cMdls)
686	{
687	/* don't attempt map locked regions with more than one mdl. */
688	if (pMemNtToMap->cMdls != 1)
689	return VERR_NOT_SUPPORTED;
690
691	#ifdef IPRT_TARGET_NT4
692	/* NT SP0 can't map to a specific address. */
693	if (pvFixed != (void *)-1)
694	return VERR_NOT_SUPPORTED;
695	#endif
696
697	/* we can't map anything to the first page, sorry. */
698	if (pvFixed == 0)
699	return VERR_NOT_SUPPORTED;
700
701	/* only one system mapping for now - no time to figure out MDL restrictions right now. */
702	if ( pMemNtToMap->Core.uRel.Parent.cMappings
703	&& R0Process == NIL_RTR0PROCESS)
704	return VERR_NOT_SUPPORTED;
705
706	__try
707	{
708	/** @todo uAlignment */
709	/** @todo How to set the protection on the pages? */
710	#ifdef IPRT_TARGET_NT4
711	void *pv = MmMapLockedPages(pMemNtToMap->apMdls[0],
712	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode);
713	#else
714	void *pv = MmMapLockedPagesSpecifyCache(pMemNtToMap->apMdls[0],
715	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode,
716	MmCached,
717	pvFixed != (void *)-1 ? pvFixed : NULL,
718	FALSE /* no bug check on failure */,
719	NormalPagePriority);
720	#endif
721	if (pv)
722	{
723	NOREF(fProt);
724
725	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
726	pMemNtToMap->Core.cb);
727	if (pMemNt)
728	{
729	pMemNt->Core.u.Mapping.R0Process = R0Process;
730	*ppMem = &pMemNt->Core;
731	return VINF_SUCCESS;
732	}
733
734	rc = VERR_NO_MEMORY;
735	MmUnmapLockedPages(pv, pMemNtToMap->apMdls[0]);
736	}
737	}
738	__except(EXCEPTION_EXECUTE_HANDLER)
739	{
740	NTSTATUS rcNt = GetExceptionCode();
741	Log(("rtR0MemObjNtMap: Exception Code %#x\n", rcNt));
742
743	/* nothing */
744	rc = VERR_MAP_FAILED;
745	}
746
747	}
748	else
749	{
750	AssertReturn( pMemNtToMap->Core.enmType == RTR0MEMOBJTYPE_PHYS
751	&& !pMemNtToMap->Core.u.Phys.fAllocated, VERR_INTERNAL_ERROR);
752
753	/* cannot map phys mem to user space (yet). */
754	if (R0Process != NIL_RTR0PROCESS)
755	return VERR_NOT_SUPPORTED;
756
757	/** @todo uAlignment */
758	/** @todo How to set the protection on the pages? */
759	PHYSICAL_ADDRESS Phys;
760	Phys.QuadPart = pMemNtToMap->Core.u.Phys.PhysBase;
761	void pv = MmMapIoSpace(Phys, pMemNtToMap->Core.cb, MmCached); /* @todo add cache type to fProt. */
762	if (pv)
763	{
764	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
765	pMemNtToMap->Core.cb);
766	if (pMemNt)
767	{
768	pMemNt->Core.u.Mapping.R0Process = R0Process;
769	*ppMem = &pMemNt->Core;
770	return VINF_SUCCESS;
771	}
772
773	rc = VERR_NO_MEMORY;
774	MmUnmapIoSpace(pv, pMemNtToMap->Core.cb);
775	}
776	}
777
778	NOREF(uAlignment); NOREF(fProt);
779	return rc;
780	}
781
782
783	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
784	unsigned fProt, size_t offSub, size_t cbSub)
785	{
786	AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
787	return rtR0MemObjNtMap(ppMem, pMemToMap, pvFixed, uAlignment, fProt, NIL_RTR0PROCESS);
788	}
789
790
791	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
792	{
793	AssertReturn(R0Process == RTR0ProcHandleSelf(), VERR_NOT_SUPPORTED);
794	return rtR0MemObjNtMap(ppMem, pMemToMap, (void *)R3PtrFixed, uAlignment, fProt, R0Process);
795	}
796
797
798	int rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
799	{
800	NOREF(pMem);
801	NOREF(offSub);
802	NOREF(cbSub);
803	NOREF(fProt);
804	return VERR_NOT_SUPPORTED;
805	}
806
807
808	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
809	{
810	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)pMem;
811
812	if (pMemNt->cMdls)
813	{
814	if (pMemNt->cMdls == 1)
815	{
816	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[0]);
817	return (RTHCPHYS)paPfns[iPage] << PAGE_SHIFT;
818	}
819
820	size_t iMdl = iPage / (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
821	size_t iMdlPfn = iPage % (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
822	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[iMdl]);
823	return (RTHCPHYS)paPfns[iMdlPfn] << PAGE_SHIFT;
824	}
825
826	switch (pMemNt->Core.enmType)
827	{
828	case RTR0MEMOBJTYPE_MAPPING:
829	return rtR0MemObjNativeGetPagePhysAddr(pMemNt->Core.uRel.Child.pParent, iPage);
830
831	case RTR0MEMOBJTYPE_PHYS:
832	return pMemNt->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
833
834	case RTR0MEMOBJTYPE_PAGE:
835	case RTR0MEMOBJTYPE_PHYS_NC:
836	case RTR0MEMOBJTYPE_LOW:
837	case RTR0MEMOBJTYPE_CONT:
838	case RTR0MEMOBJTYPE_LOCK:
839	default:
840	AssertMsgFailed(("%d\n", pMemNt->Core.enmType));
841	case RTR0MEMOBJTYPE_RES_VIRT:
842	return NIL_RTHCPHYS;
843	}
844	}
845

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source: vbox/trunk/src/VBox/Runtime/r0drv/nt/memobj-r0drv-nt.cpp@ 26430

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