memobj-r0drv-nt.cpp@ 28777

Last change on this file since 28777 was 28777, checked in by vboxsync, 15 years ago
iprt: added CachePolicy parameter to RTR0MemObjEnterPhys()
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File size: 28.5 KB

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1	/* $Id: memobj-r0drv-nt.cpp 28777 2010-04-26 19:45:16Z 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.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	* 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 PAGE_SIZE, _2M, _4M and _1G.
341	*/
342	static int rtR0MemObjNativeAllocContEx(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable, RTHCPHYS PhysHighest,
343	size_t uAlignment)
344	{
345	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
346	#ifdef TARGET_NT4
347	if (uAlignment != PAGE_SIZE)
348	return VERR_NOT_SUPPORTED;
349	#endif
350
351	/*
352	* Allocate the memory and create an MDL for it.
353	*/
354	PHYSICAL_ADDRESS PhysAddrHighest;
355	PhysAddrHighest.QuadPart = PhysHighest;
356	#ifndef TARGET_NT4
357	PHYSICAL_ADDRESS PhysAddrLowest, PhysAddrBoundary;
358	PhysAddrLowest.QuadPart = 0;
359	PhysAddrBoundary.QuadPart = (uAlignment == PAGE_SIZE) ? 0 : uAlignment;
360	void *pv = MmAllocateContiguousMemorySpecifyCache(cb, PhysAddrLowest, PhysAddrHighest, PhysAddrBoundary, MmCached);
361	#else
362	void *pv = MmAllocateContiguousMemory(cb, PhysAddrHighest);
363	#endif
364	if (!pv)
365	return VERR_NO_MEMORY;
366
367	PMDL pMdl = IoAllocateMdl(pv, (ULONG)cb, FALSE, FALSE, NULL);
368	if (pMdl)
369	{
370	MmBuildMdlForNonPagedPool(pMdl);
371	#ifdef RT_ARCH_AMD64
372	MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE);
373	#endif
374
375	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_CONT, pv, cb);
376	if (pMemNt)
377	{
378	pMemNt->Core.u.Cont.Phys = (RTHCPHYS)*MmGetMdlPfnArray(pMdl) << PAGE_SHIFT;
379	pMemNt->cMdls = 1;
380	pMemNt->apMdls[0] = pMdl;
381	*ppMem = &pMemNt->Core;
382	return VINF_SUCCESS;
383	}
384
385	IoFreeMdl(pMdl);
386	}
387	MmFreeContiguousMemory(pv);
388	return VERR_NO_MEMORY;
389	}
390
391
392	int rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
393	{
394	return rtR0MemObjNativeAllocContEx(ppMem, cb, fExecutable, _4G-1, PAGE_SIZE /* alignment */);
395	}
396
397
398	int rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
399	{
400	#ifndef IPRT_TARGET_NT4
401	/*
402	* Try and see if we're lucky and get a contiguous chunk from MmAllocatePagesForMdl.
403	*
404	* This is preferable to using MmAllocateContiguousMemory because there are
405	* a few situations where the memory shouldn't be mapped, like for instance
406	* VT-x control memory. Since these are rather small allocations (one or
407	* two pages) MmAllocatePagesForMdl will probably be able to satisfy the
408	* request.
409	*
410	* If the allocation is big, the chances are probably not very good. The
411	* current limit is kind of random...
412	*/
413	if ( cb < _128K
414	&& uAlignment == PAGE_SIZE)
415
416	{
417	PHYSICAL_ADDRESS Zero;
418	Zero.QuadPart = 0;
419	PHYSICAL_ADDRESS HighAddr;
420	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
421	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
422	if (pMdl)
423	{
424	if (MmGetMdlByteCount(pMdl) >= cb)
425	{
426	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMdl);
427	PFN_NUMBER Pfn = paPfns[0] + 1;
428	const size_t cPages = cb >> PAGE_SHIFT;
429	size_t iPage;
430	for (iPage = 1; iPage < cPages; iPage++, Pfn++)
431	if (paPfns[iPage] != Pfn)
432	break;
433	if (iPage >= cPages)
434	{
435	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
436	if (pMemNt)
437	{
438	pMemNt->Core.u.Phys.fAllocated = true;
439	pMemNt->Core.u.Phys.PhysBase = (RTHCPHYS)paPfns[0] << PAGE_SHIFT;
440	pMemNt->fAllocatedPagesForMdl = true;
441	pMemNt->cMdls = 1;
442	pMemNt->apMdls[0] = pMdl;
443	*ppMem = &pMemNt->Core;
444	return VINF_SUCCESS;
445	}
446	}
447	}
448	MmFreePagesFromMdl(pMdl);
449	ExFreePool(pMdl);
450	}
451	}
452	#endif /* !IPRT_TARGET_NT4 */
453
454	return rtR0MemObjNativeAllocContEx(ppMem, cb, false, PhysHighest, uAlignment);
455	}
456
457
458	int rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
459	{
460	#ifndef IPRT_TARGET_NT4
461	PHYSICAL_ADDRESS Zero;
462	Zero.QuadPart = 0;
463	PHYSICAL_ADDRESS HighAddr;
464	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
465	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
466	if (pMdl)
467	{
468	if (MmGetMdlByteCount(pMdl) >= cb)
469	{
470	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS_NC, NULL, cb);
471	if (pMemNt)
472	{
473	pMemNt->fAllocatedPagesForMdl = true;
474	pMemNt->cMdls = 1;
475	pMemNt->apMdls[0] = pMdl;
476	*ppMem = &pMemNt->Core;
477	return VINF_SUCCESS;
478	}
479	}
480	MmFreePagesFromMdl(pMdl);
481	ExFreePool(pMdl);
482	}
483	return VERR_NO_MEMORY;
484	#else /* IPRT_TARGET_NT4 */
485	return VERR_NOT_SUPPORTED;
486	#endif /* IPRT_TARGET_NT4 */
487	}
488
489
490	int rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb, unsigned CachePolicy)
491	{
492	AssertReturn(CachePolicy == RTMEM_CACHE_POLICY_DONT_CARE, VERR_NOT_IMPLEMENTED);
493
494	/*
495	* Validate the address range and create a descriptor for it.
496	*/
497	PFN_NUMBER Pfn = (PFN_NUMBER)(Phys >> PAGE_SHIFT);
498	if (((RTHCPHYS)Pfn << PAGE_SHIFT) != Phys)
499	return VERR_ADDRESS_TOO_BIG;
500
501	/*
502	* Create the IPRT memory object.
503	*/
504	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
505	if (pMemNt)
506	{
507	pMemNt->Core.u.Phys.PhysBase = Phys;
508	pMemNt->Core.u.Phys.fAllocated = false;
509	*ppMem = &pMemNt->Core;
510	return VINF_SUCCESS;
511	}
512	return VERR_NO_MEMORY;
513	}
514
515
516	/**
517	* Internal worker for locking down pages.
518	*
519	* @return IPRT status code.
520	*
521	* @param ppMem Where to store the memory object pointer.
522	* @param pv First page.
523	* @param cb Number of bytes.
524	* @param fAccess The desired access, a combination of RTMEM_PROT_READ
525	* and RTMEM_PROT_WRITE.
526	* @param R0Process The process \a pv and \a cb refers to.
527	*/
528	static int rtR0MemObjNtLock(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
529	{
530	/*
531	* Calc the number of MDLs we need and allocate the memory object structure.
532	*/
533	size_t cMdls = cb / MAX_LOCK_MEM_SIZE;
534	if (cb % MAX_LOCK_MEM_SIZE)
535	cMdls++;
536	if (cMdls >= UINT32_MAX)
537	return VERR_OUT_OF_RANGE;
538	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJNT, apMdls[cMdls]),
539	RTR0MEMOBJTYPE_LOCK, pv, cb);
540	if (!pMemNt)
541	return VERR_NO_MEMORY;
542
543	/*
544	* Loop locking down the sub parts of the memory.
545	*/
546	int rc = VINF_SUCCESS;
547	size_t cbTotal = 0;
548	uint8_t pb = (uint8_t )pv;
549	uint32_t iMdl;
550	for (iMdl = 0; iMdl < cMdls; iMdl++)
551	{
552	/*
553	* Calc the Mdl size and allocate it.
554	*/
555	size_t cbCur = cb - cbTotal;
556	if (cbCur > MAX_LOCK_MEM_SIZE)
557	cbCur = MAX_LOCK_MEM_SIZE;
558	AssertMsg(cbCur, ("cbCur: 0!\n"));
559	PMDL pMdl = IoAllocateMdl(pb, (ULONG)cbCur, FALSE, FALSE, NULL);
560	if (!pMdl)
561	{
562	rc = VERR_NO_MEMORY;
563	break;
564	}
565
566	/*
567	* Lock the pages.
568	*/
569	__try
570	{
571	MmProbeAndLockPages(pMdl,
572	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode,
573	fAccess == RTMEM_PROT_READ
574	? IoReadAccess
575	: fAccess == RTMEM_PROT_WRITE
576	? IoWriteAccess
577	: IoModifyAccess);
578
579	pMemNt->apMdls[iMdl] = pMdl;
580	pMemNt->cMdls++;
581	}
582	__except(EXCEPTION_EXECUTE_HANDLER)
583	{
584	IoFreeMdl(pMdl);
585	rc = VERR_LOCK_FAILED;
586	break;
587	}
588
589	if (R0Process != NIL_RTR0PROCESS)
590	{
591	/* Make sure the user process can't change the allocation. */
592	pMemNt->pvSecureMem = MmSecureVirtualMemory(pv, cb,
593	fAccess & RTMEM_PROT_WRITE
594	? PAGE_READWRITE
595	: PAGE_READONLY);
596	if (!pMemNt->pvSecureMem)
597	{
598	rc = VERR_NO_MEMORY;
599	break;
600	}
601	}
602
603	/* next */
604	cbTotal += cbCur;
605	pb += cbCur;
606	}
607	if (RT_SUCCESS(rc))
608	{
609	Assert(pMemNt->cMdls == cMdls);
610	pMemNt->Core.u.Lock.R0Process = R0Process;
611	*ppMem = &pMemNt->Core;
612	return rc;
613	}
614
615	/*
616	* We failed, perform cleanups.
617	*/
618	while (iMdl-- > 0)
619	{
620	MmUnlockPages(pMemNt->apMdls[iMdl]);
621	IoFreeMdl(pMemNt->apMdls[iMdl]);
622	pMemNt->apMdls[iMdl] = NULL;
623	}
624	if (pMemNt->pvSecureMem)
625	{
626	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
627	pMemNt->pvSecureMem = NULL;
628	}
629
630	rtR0MemObjDelete(&pMemNt->Core);
631	return rc;
632	}
633
634
635	int rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
636	{
637	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
638	/* (Can use MmProbeAndLockProcessPages if we need to mess with other processes later.) */
639	return rtR0MemObjNtLock(ppMem, (void *)R3Ptr, cb, fAccess, R0Process);
640	}
641
642
643	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
644	{
645	return rtR0MemObjNtLock(ppMem, pv, cb, fAccess, NIL_RTR0PROCESS);
646	}
647
648
649	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
650	{
651	/*
652	* MmCreateSection(SEC_RESERVE) + MmMapViewInSystemSpace perhaps?
653	*/
654	return VERR_NOT_IMPLEMENTED;
655	}
656
657
658	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
659	{
660	/*
661	* ZeCreateSection(SEC_RESERVE) + ZwMapViewOfSection perhaps?
662	*/
663	return VERR_NOT_IMPLEMENTED;
664	}
665
666
667	/**
668	* Internal worker for rtR0MemObjNativeMapKernel and rtR0MemObjNativeMapUser.
669	*
670	* @returns IPRT status code.
671	* @param ppMem Where to store the memory object for the mapping.
672	* @param pMemToMap The memory object to map.
673	* @param pvFixed Where to map it. (void *)-1 if anywhere is fine.
674	* @param uAlignment The alignment requirement for the mapping.
675	* @param fProt The desired page protection for the mapping.
676	* @param R0Process If NIL_RTR0PROCESS map into system (kernel) memory.
677	* If not nil, it's the current process.
678	*/
679	static int rtR0MemObjNtMap(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
680	unsigned fProt, RTR0PROCESS R0Process)
681	{
682	int rc = VERR_MAP_FAILED;
683
684	/*
685	* Check that the specified alignment is supported.
686	*/
687	if (uAlignment > PAGE_SIZE)
688	return VERR_NOT_SUPPORTED;
689
690	/*
691	* There are two basic cases here, either we've got an MDL and can
692	* map it using MmMapLockedPages, or we've got a contiguous physical
693	* range (MMIO most likely) and can use MmMapIoSpace.
694	*/
695	PRTR0MEMOBJNT pMemNtToMap = (PRTR0MEMOBJNT)pMemToMap;
696	if (pMemNtToMap->cMdls)
697	{
698	/* don't attempt map locked regions with more than one mdl. */
699	if (pMemNtToMap->cMdls != 1)
700	return VERR_NOT_SUPPORTED;
701
702	#ifdef IPRT_TARGET_NT4
703	/* NT SP0 can't map to a specific address. */
704	if (pvFixed != (void *)-1)
705	return VERR_NOT_SUPPORTED;
706	#endif
707
708	/* we can't map anything to the first page, sorry. */
709	if (pvFixed == 0)
710	return VERR_NOT_SUPPORTED;
711
712	/* only one system mapping for now - no time to figure out MDL restrictions right now. */
713	if ( pMemNtToMap->Core.uRel.Parent.cMappings
714	&& R0Process == NIL_RTR0PROCESS)
715	return VERR_NOT_SUPPORTED;
716
717	__try
718	{
719	/** @todo uAlignment */
720	/** @todo How to set the protection on the pages? */
721	#ifdef IPRT_TARGET_NT4
722	void *pv = MmMapLockedPages(pMemNtToMap->apMdls[0],
723	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode);
724	#else
725	void *pv = MmMapLockedPagesSpecifyCache(pMemNtToMap->apMdls[0],
726	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode,
727	MmCached,
728	pvFixed != (void *)-1 ? pvFixed : NULL,
729	FALSE /* no bug check on failure */,
730	NormalPagePriority);
731	#endif
732	if (pv)
733	{
734	NOREF(fProt);
735
736	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
737	pMemNtToMap->Core.cb);
738	if (pMemNt)
739	{
740	pMemNt->Core.u.Mapping.R0Process = R0Process;
741	*ppMem = &pMemNt->Core;
742	return VINF_SUCCESS;
743	}
744
745	rc = VERR_NO_MEMORY;
746	MmUnmapLockedPages(pv, pMemNtToMap->apMdls[0]);
747	}
748	}
749	__except(EXCEPTION_EXECUTE_HANDLER)
750	{
751	NTSTATUS rcNt = GetExceptionCode();
752	Log(("rtR0MemObjNtMap: Exception Code %#x\n", rcNt));
753
754	/* nothing */
755	rc = VERR_MAP_FAILED;
756	}
757
758	}
759	else
760	{
761	AssertReturn( pMemNtToMap->Core.enmType == RTR0MEMOBJTYPE_PHYS
762	&& !pMemNtToMap->Core.u.Phys.fAllocated, VERR_INTERNAL_ERROR);
763
764	/* cannot map phys mem to user space (yet). */
765	if (R0Process != NIL_RTR0PROCESS)
766	return VERR_NOT_SUPPORTED;
767
768	/** @todo uAlignment */
769	/** @todo How to set the protection on the pages? */
770	PHYSICAL_ADDRESS Phys;
771	Phys.QuadPart = pMemNtToMap->Core.u.Phys.PhysBase;
772	void pv = MmMapIoSpace(Phys, pMemNtToMap->Core.cb, MmCached); /* @todo add cache type to fProt. */
773	if (pv)
774	{
775	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
776	pMemNtToMap->Core.cb);
777	if (pMemNt)
778	{
779	pMemNt->Core.u.Mapping.R0Process = R0Process;
780	*ppMem = &pMemNt->Core;
781	return VINF_SUCCESS;
782	}
783
784	rc = VERR_NO_MEMORY;
785	MmUnmapIoSpace(pv, pMemNtToMap->Core.cb);
786	}
787	}
788
789	NOREF(uAlignment); NOREF(fProt);
790	return rc;
791	}
792
793
794	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
795	unsigned fProt, size_t offSub, size_t cbSub)
796	{
797	AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
798	return rtR0MemObjNtMap(ppMem, pMemToMap, pvFixed, uAlignment, fProt, NIL_RTR0PROCESS);
799	}
800
801
802	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
803	{
804	AssertReturn(R0Process == RTR0ProcHandleSelf(), VERR_NOT_SUPPORTED);
805	return rtR0MemObjNtMap(ppMem, pMemToMap, (void *)R3PtrFixed, uAlignment, fProt, R0Process);
806	}
807
808
809	int rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
810	{
811	NOREF(pMem);
812	NOREF(offSub);
813	NOREF(cbSub);
814	NOREF(fProt);
815	return VERR_NOT_SUPPORTED;
816	}
817
818
819	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
820	{
821	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)pMem;
822
823	if (pMemNt->cMdls)
824	{
825	if (pMemNt->cMdls == 1)
826	{
827	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[0]);
828	return (RTHCPHYS)paPfns[iPage] << PAGE_SHIFT;
829	}
830
831	size_t iMdl = iPage / (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
832	size_t iMdlPfn = iPage % (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
833	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[iMdl]);
834	return (RTHCPHYS)paPfns[iMdlPfn] << PAGE_SHIFT;
835	}
836
837	switch (pMemNt->Core.enmType)
838	{
839	case RTR0MEMOBJTYPE_MAPPING:
840	return rtR0MemObjNativeGetPagePhysAddr(pMemNt->Core.uRel.Child.pParent, iPage);
841
842	case RTR0MEMOBJTYPE_PHYS:
843	return pMemNt->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
844
845	case RTR0MEMOBJTYPE_PAGE:
846	case RTR0MEMOBJTYPE_PHYS_NC:
847	case RTR0MEMOBJTYPE_LOW:
848	case RTR0MEMOBJTYPE_CONT:
849	case RTR0MEMOBJTYPE_LOCK:
850	default:
851	AssertMsgFailed(("%d\n", pMemNt->Core.enmType));
852	case RTR0MEMOBJTYPE_RES_VIRT:
853	return NIL_RTHCPHYS;
854	}
855	}
856

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source: vbox/trunk/src/VBox/Runtime/r0drv/nt/memobj-r0drv-nt.cpp@ 28777

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