memobj-r0drv-nt.cpp@ 4725

Last change on this file since 4725 was 4725, checked in by vboxsync, 18 years ago
Use MmSecureVirtualMemory to have some limited protection with usermode allocations
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1	/* $Id: memobj-r0drv-nt.cpp 4725 2007-09-12 10:12:31Z vboxsync $ */
2	/** @file
3	* innotek Portable Runtime - Ring-0 Memory Objects, NT.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 innotek GmbH
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 as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#include "the-nt-kernel.h"
23
24	#include <iprt/memobj.h>
25	#include <iprt/alloc.h>
26	#include <iprt/assert.h>
27	#include <iprt/log.h>
28	#include <iprt/param.h>
29	#include <iprt/string.h>
30	#include <iprt/process.h>
31	#include "internal/memobj.h"
32
33
34	/*******************************************************************************
35	* Defined Constants And Macros *
36	*******************************************************************************/
37	/** Maximum number of bytes we try to lock down in one go.
38	* This is supposed to have a limit right below 256MB, but this appears
39	* to actually be much lower. The values here have been determined experimentally.
40	*/
41	#ifdef RT_ARCH_X86
42	# define MAX_LOCK_MEM_SIZE (3210241024) /* 32MB */
43	#endif
44	#ifdef RT_ARCH_AMD64
45	# define MAX_LOCK_MEM_SIZE (2410241024) /* 24MB */
46	#endif
47
48
49	/*******************************************************************************
50	* Structures and Typedefs *
51	*******************************************************************************/
52	/**
53	* The NT version of the memory object structure.
54	*/
55	typedef struct RTR0MEMOBJNT
56	{
57	/** The core structure. */
58	RTR0MEMOBJINTERNAL Core;
59	#ifndef IPRT_TARGET_NT4
60	/** Used MmAllocatePagesForMdl(). */
61	bool fAllocatedPagesForMdl;
62	#endif
63	/** Pointer returned by MmSecureVirtualMemory */
64	PVOID pvSecureMem;
65	/** The number of PMDLs (memory descriptor lists) in the array. */
66	uint32_t cMdls;
67	/** Array of MDL pointers. (variable size) */
68	PMDL apMdls[1];
69	} RTR0MEMOBJNT, *PRTR0MEMOBJNT;
70
71
72	int rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
73	{
74	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)pMem;
75
76	/*
77	* Deal with it on a per type basis (just as a variation).
78	*/
79	switch (pMemNt->Core.enmType)
80	{
81	case RTR0MEMOBJTYPE_LOW:
82	#ifndef IPRT_TARGET_NT4
83	if (pMemNt->fAllocatedPagesForMdl)
84	{
85	Assert(pMemNt->Core.pv && pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
86	MmUnmapLockedPages(pMemNt->Core.pv, pMemNt->apMdls[0]);
87	pMemNt->Core.pv = NULL;
88	if (pMemNt->pvSecureMem)
89	{
90	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
91	pMemNt->pvSecureMem = NULL;
92	}
93
94	MmFreePagesFromMdl(pMemNt->apMdls[0]);
95	ExFreePool(pMemNt->apMdls[0]);
96	pMemNt->apMdls[0] = NULL;
97	pMemNt->cMdls = 0;
98	break;
99	}
100	#endif
101	AssertFailed();
102	break;
103
104	case RTR0MEMOBJTYPE_PAGE:
105	Assert(pMemNt->Core.pv);
106	ExFreePool(pMemNt->Core.pv);
107	pMemNt->Core.pv = NULL;
108
109	Assert(pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
110	IoFreeMdl(pMemNt->apMdls[0]);
111	pMemNt->apMdls[0] = NULL;
112	pMemNt->cMdls = 0;
113	break;
114
115	case RTR0MEMOBJTYPE_CONT:
116	Assert(pMemNt->Core.pv);
117	MmFreeContiguousMemory(pMemNt->Core.pv);
118	pMemNt->Core.pv = NULL;
119
120	Assert(pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
121	IoFreeMdl(pMemNt->apMdls[0]);
122	pMemNt->apMdls[0] = NULL;
123	pMemNt->cMdls = 0;
124	break;
125
126	case RTR0MEMOBJTYPE_PHYS:
127	case RTR0MEMOBJTYPE_PHYS_NC:
128	#ifndef IPRT_TARGET_NT4
129	if (pMemNt->fAllocatedPagesForMdl)
130	{
131	MmFreePagesFromMdl(pMemNt->apMdls[0]);
132	ExFreePool(pMemNt->apMdls[0]);
133	pMemNt->apMdls[0] = NULL;
134	pMemNt->cMdls = 0;
135	break;
136	}
137	#endif
138	AssertFailed();
139	break;
140
141	case RTR0MEMOBJTYPE_LOCK:
142	if (pMemNt->pvSecureMem)
143	{
144	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
145	pMemNt->pvSecureMem = NULL;
146	}
147	for (uint32_t i = 0; i < pMemNt->cMdls; i++)
148	{
149	MmUnlockPages(pMemNt->apMdls[i]);
150	IoFreeMdl(pMemNt->apMdls[i]);
151	pMemNt->apMdls[i] = NULL;
152	}
153	break;
154
155	case RTR0MEMOBJTYPE_RES_VIRT:
156	/* if (pMemNt->Core.u.ResVirt.R0Process == NIL_RTR0PROCESS)
157	{
158	}
159	else
160	{
161	}*/
162	AssertMsgFailed(("RTR0MEMOBJTYPE_RES_VIRT\n"));
163	return VERR_INTERNAL_ERROR;
164	break;
165
166	case RTR0MEMOBJTYPE_MAPPING:
167	{
168	Assert(pMemNt->cMdls == 0 && pMemNt->Core.pv);
169	PRTR0MEMOBJNT pMemNtParent = (PRTR0MEMOBJNT)pMemNt->Core.uRel.Child.pParent;
170	Assert(pMemNtParent);
171	if (pMemNtParent->cMdls)
172	{
173	Assert(pMemNtParent->cMdls == 1 && pMemNtParent->apMdls[0]);
174	Assert( pMemNt->Core.u.Mapping.R0Process == NIL_RTR0PROCESS
175	\|\| pMemNt->Core.u.Mapping.R0Process == RTR0ProcHandleSelf());
176	MmUnmapLockedPages(pMemNt->Core.pv, pMemNtParent->apMdls[0]);
177	}
178	else
179	{
180	Assert( pMemNtParent->Core.enmType == RTR0MEMOBJTYPE_PHYS
181	&& !pMemNtParent->Core.u.Phys.fAllocated);
182	Assert(pMemNt->Core.u.Mapping.R0Process == NIL_RTR0PROCESS);
183	MmUnmapIoSpace(pMemNt->Core.pv, pMemNt->Core.cb);
184	}
185	pMemNt->Core.pv = NULL;
186	break;
187	}
188
189	default:
190	AssertMsgFailed(("enmType=%d\n", pMemNt->Core.enmType));
191	return VERR_INTERNAL_ERROR;
192	}
193
194	return VINF_SUCCESS;
195	}
196
197
198	int rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
199	{
200	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
201
202	/*
203	* Try allocate the memory and create an MDL for them so
204	* we can query the physical addresses and do mappings later
205	* without running into out-of-memory conditions and similar problems.
206	*/
207	int rc = VERR_NO_PAGE_MEMORY;
208	void *pv = ExAllocatePoolWithTag(NonPagedPool, cb, IPRT_NT_POOL_TAG);
209	if (pv)
210	{
211	PMDL pMdl = IoAllocateMdl(pv, (ULONG)cb, FALSE, FALSE, NULL);
212	if (pMdl)
213	{
214	MmBuildMdlForNonPagedPool(pMdl);
215	#ifdef RT_ARCH_AMD64
216	MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE);
217	#endif
218
219	/*
220	* Create the IPRT memory object.
221	*/
222	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PAGE, pv, cb);
223	if (pMemNt)
224	{
225	pMemNt->cMdls = 1;
226	pMemNt->apMdls[0] = pMdl;
227	*ppMem = &pMemNt->Core;
228	return VINF_SUCCESS;
229	}
230
231	rc = VERR_NO_MEMORY;
232	IoFreeMdl(pMdl);
233	}
234	ExFreePool(pv);
235	}
236	return rc;
237	}
238
239
240	int rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
241	{
242	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
243
244	/*
245	* Try see if we get lucky first...
246	* (We could probably just assume we're lucky on NT4.)
247	*/
248	int rc = rtR0MemObjNativeAllocPage(ppMem, cb, fExecutable);
249	if (RT_SUCCESS(rc))
250	{
251	size_t iPage = cb >> PAGE_SHIFT;
252	while (iPage-- > 0)
253	if (rtR0MemObjNativeGetPagePhysAddr(*ppMem, iPage) >= _4G)
254	{
255	rc = VERR_NO_MEMORY;
256	break;
257	}
258	if (RT_SUCCESS(rc))
259	return rc;
260
261	/* The following ASSUMES that rtR0MemObjNativeAllocPage returns a completed object. */
262	RTR0MemObjFree(*ppMem, false);
263	*ppMem = NULL;
264	}
265
266	#ifndef IPRT_TARGET_NT4
267	/*
268	* Use MmAllocatePagesForMdl to specify the range of physical addresses we wish to use.
269	*/
270	PHYSICAL_ADDRESS Zero;
271	Zero.QuadPart = 0;
272	PHYSICAL_ADDRESS HighAddr;
273	HighAddr.QuadPart = _4G - 1;
274	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
275	if (pMdl)
276	{
277	if (MmGetMdlByteCount(pMdl) >= cb)
278	{
279	__try
280	{
281	void pv = MmMapLockedPagesSpecifyCache(pMdl, KernelMode, MmCached, NULL / no base address */,
282	FALSE /* no bug check on failure */, NormalPagePriority);
283	if (pv)
284	{
285	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_LOW, pv, cb);
286	if (pMemNt)
287	{
288	pMemNt->fAllocatedPagesForMdl = true;
289	pMemNt->cMdls = 1;
290	pMemNt->apMdls[0] = pMdl;
291	*ppMem = &pMemNt->Core;
292	return VINF_SUCCESS;
293	}
294	MmUnmapLockedPages(pv, pMdl);
295	}
296	}
297	__except(EXCEPTION_EXECUTE_HANDLER)
298	{
299	/* nothing */
300	}
301	}
302	MmFreePagesFromMdl(pMdl);
303	ExFreePool(pMdl);
304	}
305	#endif /* !IPRT_TARGET_NT4 */
306
307	/*
308	* Fall back on contiguous memory...
309	*/
310	return rtR0MemObjNativeAllocCont(ppMem, cb, fExecutable);
311	}
312
313
314	/**
315	* Internal worker for rtR0MemObjNativeAllocCont(), rtR0MemObjNativeAllocPhys()
316	* and rtR0MemObjNativeAllocPhysNC() that takes a max physical address in addition
317	* to what rtR0MemObjNativeAllocCont() does.
318	*
319	* @returns IPRT status code.
320	* @param ppMem Where to store the pointer to the ring-0 memory object.
321	* @param cb The size.
322	* @param fExecutable Whether the mapping should be executable or not.
323	* @param PhysHighest The highest physical address for the pages in allocation.
324	*/
325	static int rtR0MemObjNativeAllocContEx(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable, RTHCPHYS PhysHighest)
326	{
327	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
328
329	/*
330	* Allocate the memory and create an MDL for it.
331	*/
332	PHYSICAL_ADDRESS PhysAddrHighest;
333	PhysAddrHighest.QuadPart = PhysHighest;
334	void *pv = MmAllocateContiguousMemory(cb, PhysAddrHighest);
335	if (!pv)
336	return VERR_NO_MEMORY;
337
338	PMDL pMdl = IoAllocateMdl(pv, (ULONG)cb, FALSE, FALSE, NULL);
339	if (pMdl)
340	{
341	MmBuildMdlForNonPagedPool(pMdl);
342	#ifdef RT_ARCH_AMD64
343	MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE);
344	#endif
345
346	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_CONT, pv, cb);
347	if (pMemNt)
348	{
349	pMemNt->Core.u.Cont.Phys = (RTHCPHYS)*MmGetMdlPfnArray(pMdl) << PAGE_SHIFT;
350	pMemNt->cMdls = 1;
351	pMemNt->apMdls[0] = pMdl;
352	*ppMem = &pMemNt->Core;
353	return VINF_SUCCESS;
354	}
355
356	IoFreeMdl(pMdl);
357	}
358	MmFreeContiguousMemory(pv);
359	return VERR_NO_MEMORY;
360	}
361
362
363	int rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
364	{
365	return rtR0MemObjNativeAllocContEx(ppMem, cb, fExecutable, _4G-1);
366	}
367
368
369	int rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
370	{
371	#ifndef IPRT_TARGET_NT4
372	/*
373	* Try and see if we're lucky and get a contiguous chunk from MmAllocatePagesForMdl.
374	*
375	* This is preferable to using MmAllocateContiguousMemory because there are
376	* a few situations where the memory shouldn't be mapped, like for instance
377	* VT-x control memory. Since these are rather small allocations (one or
378	* two pages) MmAllocatePagesForMdl will probably be able to satisfy the
379	* request.
380	*
381	* If the allocation is big, the chances are probably not very good. The
382	* current limit is kind of random...
383	*/
384	if (cb < _128K)
385	{
386	PHYSICAL_ADDRESS Zero;
387	Zero.QuadPart = 0;
388	PHYSICAL_ADDRESS HighAddr;
389	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
390	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
391	if (pMdl)
392	{
393	if (MmGetMdlByteCount(pMdl) >= cb)
394	{
395	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMdl);
396	PFN_NUMBER Pfn = paPfns[0] + 1;
397	const size_t cPages = cb >> PAGE_SHIFT;
398	size_t iPage;
399	for (iPage = 1; iPage < cPages; iPage++, Pfn++)
400	if (paPfns[iPage] != Pfn)
401	break;
402	if (iPage >= cPages)
403	{
404	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
405	if (pMemNt)
406	{
407	pMemNt->Core.u.Phys.fAllocated = true;
408	pMemNt->Core.u.Phys.PhysBase = (RTHCPHYS)paPfns[0] << PAGE_SHIFT;
409	pMemNt->fAllocatedPagesForMdl = true;
410	pMemNt->cMdls = 1;
411	pMemNt->apMdls[0] = pMdl;
412	*ppMem = &pMemNt->Core;
413	return VINF_SUCCESS;
414	}
415	}
416	}
417	MmFreePagesFromMdl(pMdl);
418	ExFreePool(pMdl);
419	}
420	}
421	#endif /* !IPRT_TARGET_NT4 */
422
423	return rtR0MemObjNativeAllocContEx(ppMem, cb, false, PhysHighest);
424	}
425
426
427	int rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
428	{
429	#ifndef IPRT_TARGET_NT4
430	PHYSICAL_ADDRESS Zero;
431	Zero.QuadPart = 0;
432	PHYSICAL_ADDRESS HighAddr;
433	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
434	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
435	if (pMdl)
436	{
437	if (MmGetMdlByteCount(pMdl) >= cb)
438	{
439	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS_NC, NULL, cb);
440	if (pMemNt)
441	{
442	pMemNt->fAllocatedPagesForMdl = true;
443	pMemNt->cMdls = 1;
444	pMemNt->apMdls[0] = pMdl;
445	*ppMem = &pMemNt->Core;
446	return VINF_SUCCESS;
447	}
448	}
449	MmFreePagesFromMdl(pMdl);
450	ExFreePool(pMdl);
451	}
452	return VERR_NO_MEMORY;
453	#else /* IPRT_TARGET_NT4 */
454	return VERR_NOT_SUPPORTED;
455	#endif /* IPRT_TARGET_NT4 */
456	}
457
458
459	int rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb)
460	{
461	/*
462	* Validate the address range and create a descriptor for it.
463	*/
464	PFN_NUMBER Pfn = (PFN_NUMBER)(Phys >> PAGE_SHIFT);
465	if (((RTHCPHYS)Pfn << PAGE_SHIFT) != Phys)
466	return VERR_ADDRESS_TOO_BIG;
467
468	/*
469	* Create the IPRT memory object.
470	*/
471	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
472	if (pMemNt)
473	{
474	pMemNt->Core.u.Phys.PhysBase = Phys;
475	pMemNt->Core.u.Phys.fAllocated = false;
476	*ppMem = &pMemNt->Core;
477	return VINF_SUCCESS;
478	}
479	return VERR_NO_MEMORY;
480	}
481
482
483	/**
484	* Internal worker for locking down pages.
485	*
486	* @return IPRT status code.
487	*
488	* @param ppMem Where to store the memory object pointer.
489	* @param pv First page.
490	* @param cb Number of bytes.
491	* @param Task The task \a pv and \a cb refers to.
492	*/
493	static int rtR0MemObjNtLock(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, RTR0PROCESS R0Process)
494	{
495	/*
496	* Calc the number of MDLs we need and allocate the memory object structure.
497	*/
498	size_t cMdls = cb / MAX_LOCK_MEM_SIZE;
499	if (cb % MAX_LOCK_MEM_SIZE)
500	cMdls++;
501	if (cMdls >= UINT32_MAX)
502	return VERR_OUT_OF_RANGE;
503	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJNT, apMdls[cMdls]),
504	RTR0MEMOBJTYPE_LOCK, pv, cb);
505	if (!pMemNt)
506	return VERR_NO_MEMORY;
507
508	/*
509	* Loop locking down the sub parts of the memory.
510	*/
511	int rc = VINF_SUCCESS;
512	size_t cbTotal = 0;
513	uint8_t pb = (uint8_t )pv;
514	uint32_t iMdl;
515	for (iMdl = 0; iMdl < cMdls; iMdl++)
516	{
517	/*
518	* Calc the Mdl size and allocate it.
519	*/
520	size_t cbCur = cb - cbTotal;
521	if (cbCur > MAX_LOCK_MEM_SIZE)
522	cbCur = MAX_LOCK_MEM_SIZE;
523	AssertMsg(cbCur, ("cbCur: 0!\n"));
524	PMDL pMdl = IoAllocateMdl(pb, (ULONG)cbCur, FALSE, FALSE, NULL);
525	if (!pMdl)
526	{
527	rc = VERR_NO_MEMORY;
528	break;
529	}
530
531	/*
532	* Lock the pages.
533	*/
534	__try
535	{
536	MmProbeAndLockPages(pMdl, R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode, IoModifyAccess);
537
538	pMemNt->apMdls[iMdl] = pMdl;
539	pMemNt->cMdls++;
540	}
541	__except(EXCEPTION_EXECUTE_HANDLER)
542	{
543	IoFreeMdl(pMdl);
544	rc = VERR_LOCK_FAILED;
545	break;
546	}
547
548	if (R0Process != NIL_RTR0PROCESS )
549	{
550	/* Make sure the user process can't change the allocation. */
551	pMemNt->pvSecureMem = MmSecureVirtualMemory(pv, cb, PAGE_READWRITE);
552	if (!pMemNt->pvSecureMem)
553	{
554	rc = VERR_NO_MEMORY;
555	break;
556	}
557	}
558
559	/* next */
560	cbTotal += cbCur;
561	pb += cbCur;
562	}
563	if (RT_SUCCESS(rc))
564	{
565	Assert(pMemNt->cMdls == cMdls);
566	pMemNt->Core.u.Lock.R0Process = R0Process;
567	*ppMem = &pMemNt->Core;
568	return rc;
569	}
570
571	/*
572	* We failed, perform cleanups.
573	*/
574	while (iMdl-- > 0)
575	{
576	MmUnlockPages(pMemNt->apMdls[iMdl]);
577	IoFreeMdl(pMemNt->apMdls[iMdl]);
578	pMemNt->apMdls[iMdl] = NULL;
579	}
580	if (pMemNt->pvSecureMem)
581	{
582	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
583	pMemNt->pvSecureMem = NULL;
584	}
585
586	rtR0MemObjDelete(&pMemNt->Core);
587	return rc;
588	}
589
590
591	int rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, RTR0PROCESS R0Process)
592	{
593	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
594	/* (Can use MmProbeAndLockProcessPages if we need to mess with other processes later.) */
595	return rtR0MemObjNtLock(ppMem, (void *)R3Ptr, cb, R0Process);
596	}
597
598
599	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb)
600	{
601	return rtR0MemObjNtLock(ppMem, pv, cb, NIL_RTR0PROCESS);
602	}
603
604
605	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
606	{
607	/*
608	* MmCreateSection(SEC_RESERVE) + MmMapViewInSystemSpace perhaps?
609	*/
610	return VERR_NOT_IMPLEMENTED;
611	}
612
613
614	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
615	{
616	/*
617	* ZeCreateSection(SEC_RESERVE) + ZwMapViewOfSection perhaps?
618	*/
619	return VERR_NOT_IMPLEMENTED;
620	}
621
622
623	/**
624	* Internal worker for rtR0MemObjNativeMapKernel and rtR0MemObjNativeMapUser.
625	*
626	* @returns IPRT status code.
627	* @param ppMem Where to store the memory object for the mapping.
628	* @param pMemToMap The memory object to map.
629	* @param pvFixed Where to map it. (void *)-1 if anywhere is fine.
630	* @param uAlignment The alignment requirement for the mapping.
631	* @param fProt The desired page protection for the mapping.
632	* @param R0Process If NIL_RTR0PROCESS map into system (kernel) memory.
633	* If not nil, it's the current process.
634	*/
635	static int rtR0MemObjNtMap(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
636	unsigned fProt, RTR0PROCESS R0Process)
637	{
638	int rc = VERR_MAP_FAILED;
639
640	/*
641	* There are two basic cases here, either we've got an MDL and can
642	* map it using MmMapLockedPages, or we've got a contiguous physical
643	* range (MMIO most likely) and can use MmMapIoSpace.
644	*/
645	PRTR0MEMOBJNT pMemNtToMap = (PRTR0MEMOBJNT)pMemToMap;
646	if (pMemNtToMap->cMdls)
647	{
648	/* don't attempt map locked regions with more than one mdl. */
649	if (pMemNtToMap->cMdls != 1)
650	return VERR_NOT_SUPPORTED;
651
652	/* we can't map anything to the first page, sorry. */
653	if (pvFixed == 0)
654	return VERR_NOT_SUPPORTED;
655
656	/* only one system mapping for now - no time to figure out MDL restrictions right now. */
657	if ( pMemNtToMap->Core.uRel.Parent.cMappings
658	&& R0Process == NIL_RTR0PROCESS)
659	return VERR_NOT_SUPPORTED;
660
661	__try
662	{
663	/** @todo uAlignment */
664	/** @todo How to set the protection on the pages? */
665	void *pv = MmMapLockedPagesSpecifyCache(pMemNtToMap->apMdls[0],
666	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode,
667	MmCached,
668	pvFixed != (void *)-1 ? pvFixed : NULL,
669	FALSE /* no bug check on failure */,
670	NormalPagePriority);
671	if (pv)
672	{
673	NOREF(fProt);
674
675	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
676	pMemNtToMap->Core.cb);
677	if (pMemNt)
678	{
679	pMemNt->Core.u.Mapping.R0Process = R0Process;
680	*ppMem = &pMemNt->Core;
681	return VINF_SUCCESS;
682	}
683
684	rc = VERR_NO_MEMORY;
685	MmUnmapLockedPages(pv, pMemNtToMap->apMdls[0]);
686	}
687	}
688	__except(EXCEPTION_EXECUTE_HANDLER)
689	{
690	/* nothing */
691	rc = VERR_MAP_FAILED;
692	}
693
694	}
695	else
696	{
697	AssertReturn( pMemNtToMap->Core.enmType == RTR0MEMOBJTYPE_PHYS
698	&& !pMemNtToMap->Core.u.Phys.fAllocated, VERR_INTERNAL_ERROR);
699
700	/* cannot map phys mem to user space (yet). */
701	if (R0Process != NIL_RTR0PROCESS)
702	return VERR_NOT_SUPPORTED;
703
704	/** @todo uAlignment */
705	/** @todo How to set the protection on the pages? */
706	PHYSICAL_ADDRESS Phys;
707	Phys.QuadPart = pMemNtToMap->Core.u.Phys.PhysBase;
708	void pv = MmMapIoSpace(Phys, pMemNtToMap->Core.cb, MmCached); /* @todo add cache type to fProt. */
709	if (pv)
710	{
711	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
712	pMemNtToMap->Core.cb);
713	if (pMemNt)
714	{
715	pMemNt->Core.u.Mapping.R0Process = R0Process;
716	*ppMem = &pMemNt->Core;
717	return VINF_SUCCESS;
718	}
719
720	rc = VERR_NO_MEMORY;
721	MmUnmapIoSpace(pv, pMemNtToMap->Core.cb);
722	}
723	}
724
725	NOREF(uAlignment); NOREF(fProt);
726	return rc;
727	}
728
729
730	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment, unsigned fProt)
731	{
732	return rtR0MemObjNtMap(ppMem, pMemToMap, pvFixed, uAlignment, fProt, NIL_RTR0PROCESS);
733	}
734
735
736	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
737	{
738	AssertReturn(R0Process == RTR0ProcHandleSelf(), VERR_NOT_SUPPORTED);
739	return rtR0MemObjNtMap(ppMem, pMemToMap, (void *)R3PtrFixed, uAlignment, fProt, R0Process);
740	}
741
742
743	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
744	{
745	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)pMem;
746
747	if (pMemNt->cMdls)
748	{
749	if (pMemNt->cMdls == 1)
750	{
751	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[0]);
752	return (RTHCPHYS)paPfns[iPage] << PAGE_SHIFT;
753	}
754
755	size_t iMdl = iPage / (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
756	size_t iMdlPfn = iPage % (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
757	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[iMdl]);
758	return (RTHCPHYS)paPfns[iMdlPfn] << PAGE_SHIFT;
759	}
760
761	switch (pMemNt->Core.enmType)
762	{
763	case RTR0MEMOBJTYPE_MAPPING:
764	return rtR0MemObjNativeGetPagePhysAddr(pMemNt->Core.uRel.Child.pParent, iPage);
765
766	case RTR0MEMOBJTYPE_PHYS:
767	return pMemNt->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
768
769	case RTR0MEMOBJTYPE_PAGE:
770	case RTR0MEMOBJTYPE_PHYS_NC:
771	case RTR0MEMOBJTYPE_LOW:
772	case RTR0MEMOBJTYPE_CONT:
773	case RTR0MEMOBJTYPE_LOCK:
774	default:
775	AssertMsgFailed(("%d\n", pMemNt->Core.enmType));
776	case RTR0MEMOBJTYPE_RES_VIRT:
777	return NIL_RTHCPHYS;
778	}
779	}
780

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source: vbox/trunk/src/VBox/Runtime/r0drv/nt/memobj-r0drv-nt.cpp@ 4725

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