memobj-r0drv-nt.cpp@ 7458

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1	/* $Id: memobj-r0drv-nt.cpp 7169 2008-02-27 13:16:24Z 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 (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	*/
336	static int rtR0MemObjNativeAllocContEx(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable, RTHCPHYS PhysHighest)
337	{
338	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
339
340	/*
341	* Allocate the memory and create an MDL for it.
342	*/
343	PHYSICAL_ADDRESS PhysAddrHighest;
344	PhysAddrHighest.QuadPart = PhysHighest;
345	void *pv = MmAllocateContiguousMemory(cb, PhysAddrHighest);
346	if (!pv)
347	return VERR_NO_MEMORY;
348
349	PMDL pMdl = IoAllocateMdl(pv, (ULONG)cb, FALSE, FALSE, NULL);
350	if (pMdl)
351	{
352	MmBuildMdlForNonPagedPool(pMdl);
353	#ifdef RT_ARCH_AMD64
354	MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE);
355	#endif
356
357	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_CONT, pv, cb);
358	if (pMemNt)
359	{
360	pMemNt->Core.u.Cont.Phys = (RTHCPHYS)*MmGetMdlPfnArray(pMdl) << PAGE_SHIFT;
361	pMemNt->cMdls = 1;
362	pMemNt->apMdls[0] = pMdl;
363	*ppMem = &pMemNt->Core;
364	return VINF_SUCCESS;
365	}
366
367	IoFreeMdl(pMdl);
368	}
369	MmFreeContiguousMemory(pv);
370	return VERR_NO_MEMORY;
371	}
372
373
374	int rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
375	{
376	return rtR0MemObjNativeAllocContEx(ppMem, cb, fExecutable, _4G-1);
377	}
378
379
380	int rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
381	{
382	#ifndef IPRT_TARGET_NT4
383	/*
384	* Try and see if we're lucky and get a contiguous chunk from MmAllocatePagesForMdl.
385	*
386	* This is preferable to using MmAllocateContiguousMemory because there are
387	* a few situations where the memory shouldn't be mapped, like for instance
388	* VT-x control memory. Since these are rather small allocations (one or
389	* two pages) MmAllocatePagesForMdl will probably be able to satisfy the
390	* request.
391	*
392	* If the allocation is big, the chances are probably not very good. The
393	* current limit is kind of random...
394	*/
395	if (cb < _128K)
396	{
397	PHYSICAL_ADDRESS Zero;
398	Zero.QuadPart = 0;
399	PHYSICAL_ADDRESS HighAddr;
400	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
401	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
402	if (pMdl)
403	{
404	if (MmGetMdlByteCount(pMdl) >= cb)
405	{
406	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMdl);
407	PFN_NUMBER Pfn = paPfns[0] + 1;
408	const size_t cPages = cb >> PAGE_SHIFT;
409	size_t iPage;
410	for (iPage = 1; iPage < cPages; iPage++, Pfn++)
411	if (paPfns[iPage] != Pfn)
412	break;
413	if (iPage >= cPages)
414	{
415	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
416	if (pMemNt)
417	{
418	pMemNt->Core.u.Phys.fAllocated = true;
419	pMemNt->Core.u.Phys.PhysBase = (RTHCPHYS)paPfns[0] << PAGE_SHIFT;
420	pMemNt->fAllocatedPagesForMdl = true;
421	pMemNt->cMdls = 1;
422	pMemNt->apMdls[0] = pMdl;
423	*ppMem = &pMemNt->Core;
424	return VINF_SUCCESS;
425	}
426	}
427	}
428	MmFreePagesFromMdl(pMdl);
429	ExFreePool(pMdl);
430	}
431	}
432	#endif /* !IPRT_TARGET_NT4 */
433
434	return rtR0MemObjNativeAllocContEx(ppMem, cb, false, PhysHighest);
435	}
436
437
438	int rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
439	{
440	#ifndef IPRT_TARGET_NT4
441	PHYSICAL_ADDRESS Zero;
442	Zero.QuadPart = 0;
443	PHYSICAL_ADDRESS HighAddr;
444	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
445	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
446	if (pMdl)
447	{
448	if (MmGetMdlByteCount(pMdl) >= cb)
449	{
450	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS_NC, NULL, cb);
451	if (pMemNt)
452	{
453	pMemNt->fAllocatedPagesForMdl = true;
454	pMemNt->cMdls = 1;
455	pMemNt->apMdls[0] = pMdl;
456	*ppMem = &pMemNt->Core;
457	return VINF_SUCCESS;
458	}
459	}
460	MmFreePagesFromMdl(pMdl);
461	ExFreePool(pMdl);
462	}
463	return VERR_NO_MEMORY;
464	#else /* IPRT_TARGET_NT4 */
465	return VERR_NOT_SUPPORTED;
466	#endif /* IPRT_TARGET_NT4 */
467	}
468
469
470	int rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb)
471	{
472	/*
473	* Validate the address range and create a descriptor for it.
474	*/
475	PFN_NUMBER Pfn = (PFN_NUMBER)(Phys >> PAGE_SHIFT);
476	if (((RTHCPHYS)Pfn << PAGE_SHIFT) != Phys)
477	return VERR_ADDRESS_TOO_BIG;
478
479	/*
480	* Create the IPRT memory object.
481	*/
482	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
483	if (pMemNt)
484	{
485	pMemNt->Core.u.Phys.PhysBase = Phys;
486	pMemNt->Core.u.Phys.fAllocated = false;
487	*ppMem = &pMemNt->Core;
488	return VINF_SUCCESS;
489	}
490	return VERR_NO_MEMORY;
491	}
492
493
494	/**
495	* Internal worker for locking down pages.
496	*
497	* @return IPRT status code.
498	*
499	* @param ppMem Where to store the memory object pointer.
500	* @param pv First page.
501	* @param cb Number of bytes.
502	* @param R0Process The process \a pv and \a cb refers to.
503	*/
504	static int rtR0MemObjNtLock(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, RTR0PROCESS R0Process)
505	{
506	/*
507	* Calc the number of MDLs we need and allocate the memory object structure.
508	*/
509	size_t cMdls = cb / MAX_LOCK_MEM_SIZE;
510	if (cb % MAX_LOCK_MEM_SIZE)
511	cMdls++;
512	if (cMdls >= UINT32_MAX)
513	return VERR_OUT_OF_RANGE;
514	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJNT, apMdls[cMdls]),
515	RTR0MEMOBJTYPE_LOCK, pv, cb);
516	if (!pMemNt)
517	return VERR_NO_MEMORY;
518
519	/*
520	* Loop locking down the sub parts of the memory.
521	*/
522	int rc = VINF_SUCCESS;
523	size_t cbTotal = 0;
524	uint8_t pb = (uint8_t )pv;
525	uint32_t iMdl;
526	for (iMdl = 0; iMdl < cMdls; iMdl++)
527	{
528	/*
529	* Calc the Mdl size and allocate it.
530	*/
531	size_t cbCur = cb - cbTotal;
532	if (cbCur > MAX_LOCK_MEM_SIZE)
533	cbCur = MAX_LOCK_MEM_SIZE;
534	AssertMsg(cbCur, ("cbCur: 0!\n"));
535	PMDL pMdl = IoAllocateMdl(pb, (ULONG)cbCur, FALSE, FALSE, NULL);
536	if (!pMdl)
537	{
538	rc = VERR_NO_MEMORY;
539	break;
540	}
541
542	/*
543	* Lock the pages.
544	*/
545	__try
546	{
547	MmProbeAndLockPages(pMdl, R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode, IoModifyAccess);
548
549	pMemNt->apMdls[iMdl] = pMdl;
550	pMemNt->cMdls++;
551	}
552	__except(EXCEPTION_EXECUTE_HANDLER)
553	{
554	IoFreeMdl(pMdl);
555	rc = VERR_LOCK_FAILED;
556	break;
557	}
558
559	if (R0Process != NIL_RTR0PROCESS )
560	{
561	/* Make sure the user process can't change the allocation. */
562	pMemNt->pvSecureMem = MmSecureVirtualMemory(pv, cb, PAGE_READWRITE);
563	if (!pMemNt->pvSecureMem)
564	{
565	rc = VERR_NO_MEMORY;
566	break;
567	}
568	}
569
570	/* next */
571	cbTotal += cbCur;
572	pb += cbCur;
573	}
574	if (RT_SUCCESS(rc))
575	{
576	Assert(pMemNt->cMdls == cMdls);
577	pMemNt->Core.u.Lock.R0Process = R0Process;
578	*ppMem = &pMemNt->Core;
579	return rc;
580	}
581
582	/*
583	* We failed, perform cleanups.
584	*/
585	while (iMdl-- > 0)
586	{
587	MmUnlockPages(pMemNt->apMdls[iMdl]);
588	IoFreeMdl(pMemNt->apMdls[iMdl]);
589	pMemNt->apMdls[iMdl] = NULL;
590	}
591	if (pMemNt->pvSecureMem)
592	{
593	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
594	pMemNt->pvSecureMem = NULL;
595	}
596
597	rtR0MemObjDelete(&pMemNt->Core);
598	return rc;
599	}
600
601
602	int rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, RTR0PROCESS R0Process)
603	{
604	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
605	/* (Can use MmProbeAndLockProcessPages if we need to mess with other processes later.) */
606	return rtR0MemObjNtLock(ppMem, (void *)R3Ptr, cb, R0Process);
607	}
608
609
610	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb)
611	{
612	return rtR0MemObjNtLock(ppMem, pv, cb, NIL_RTR0PROCESS);
613	}
614
615
616	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
617	{
618	/*
619	* MmCreateSection(SEC_RESERVE) + MmMapViewInSystemSpace perhaps?
620	*/
621	return VERR_NOT_IMPLEMENTED;
622	}
623
624
625	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
626	{
627	/*
628	* ZeCreateSection(SEC_RESERVE) + ZwMapViewOfSection perhaps?
629	*/
630	return VERR_NOT_IMPLEMENTED;
631	}
632
633
634	/**
635	* Internal worker for rtR0MemObjNativeMapKernel and rtR0MemObjNativeMapUser.
636	*
637	* @returns IPRT status code.
638	* @param ppMem Where to store the memory object for the mapping.
639	* @param pMemToMap The memory object to map.
640	* @param pvFixed Where to map it. (void *)-1 if anywhere is fine.
641	* @param uAlignment The alignment requirement for the mapping.
642	* @param fProt The desired page protection for the mapping.
643	* @param R0Process If NIL_RTR0PROCESS map into system (kernel) memory.
644	* If not nil, it's the current process.
645	*/
646	static int rtR0MemObjNtMap(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
647	unsigned fProt, RTR0PROCESS R0Process)
648	{
649	int rc = VERR_MAP_FAILED;
650
651	/*
652	* There are two basic cases here, either we've got an MDL and can
653	* map it using MmMapLockedPages, or we've got a contiguous physical
654	* range (MMIO most likely) and can use MmMapIoSpace.
655	*/
656	PRTR0MEMOBJNT pMemNtToMap = (PRTR0MEMOBJNT)pMemToMap;
657	if (pMemNtToMap->cMdls)
658	{
659	/* don't attempt map locked regions with more than one mdl. */
660	if (pMemNtToMap->cMdls != 1)
661	return VERR_NOT_SUPPORTED;
662
663	/* we can't map anything to the first page, sorry. */
664	if (pvFixed == 0)
665	return VERR_NOT_SUPPORTED;
666
667	/* only one system mapping for now - no time to figure out MDL restrictions right now. */
668	if ( pMemNtToMap->Core.uRel.Parent.cMappings
669	&& R0Process == NIL_RTR0PROCESS)
670	return VERR_NOT_SUPPORTED;
671
672	__try
673	{
674	/** @todo uAlignment */
675	/** @todo How to set the protection on the pages? */
676	void *pv = MmMapLockedPagesSpecifyCache(pMemNtToMap->apMdls[0],
677	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode,
678	MmCached,
679	pvFixed != (void *)-1 ? pvFixed : NULL,
680	FALSE /* no bug check on failure */,
681	NormalPagePriority);
682	if (pv)
683	{
684	NOREF(fProt);
685
686	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
687	pMemNtToMap->Core.cb);
688	if (pMemNt)
689	{
690	pMemNt->Core.u.Mapping.R0Process = R0Process;
691	*ppMem = &pMemNt->Core;
692	return VINF_SUCCESS;
693	}
694
695	rc = VERR_NO_MEMORY;
696	MmUnmapLockedPages(pv, pMemNtToMap->apMdls[0]);
697	}
698	}
699	__except(EXCEPTION_EXECUTE_HANDLER)
700	{
701	NTSTATUS rcNt = GetExceptionCode();
702	Log(("rtR0MemObjNtMap: Exception Code %#x\n", rcNt));
703
704	/* nothing */
705	rc = VERR_MAP_FAILED;
706	}
707
708	}
709	else
710	{
711	AssertReturn( pMemNtToMap->Core.enmType == RTR0MEMOBJTYPE_PHYS
712	&& !pMemNtToMap->Core.u.Phys.fAllocated, VERR_INTERNAL_ERROR);
713
714	/* cannot map phys mem to user space (yet). */
715	if (R0Process != NIL_RTR0PROCESS)
716	return VERR_NOT_SUPPORTED;
717
718	/** @todo uAlignment */
719	/** @todo How to set the protection on the pages? */
720	PHYSICAL_ADDRESS Phys;
721	Phys.QuadPart = pMemNtToMap->Core.u.Phys.PhysBase;
722	void pv = MmMapIoSpace(Phys, pMemNtToMap->Core.cb, MmCached); /* @todo add cache type to fProt. */
723	if (pv)
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	MmUnmapIoSpace(pv, pMemNtToMap->Core.cb);
736	}
737	}
738
739	NOREF(uAlignment); NOREF(fProt);
740	return rc;
741	}
742
743
744	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment, unsigned fProt)
745	{
746	return rtR0MemObjNtMap(ppMem, pMemToMap, pvFixed, uAlignment, fProt, NIL_RTR0PROCESS);
747	}
748
749
750	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
751	{
752	AssertReturn(R0Process == RTR0ProcHandleSelf(), VERR_NOT_SUPPORTED);
753	return rtR0MemObjNtMap(ppMem, pMemToMap, (void *)R3PtrFixed, uAlignment, fProt, R0Process);
754	}
755
756
757	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
758	{
759	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)pMem;
760
761	if (pMemNt->cMdls)
762	{
763	if (pMemNt->cMdls == 1)
764	{
765	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[0]);
766	return (RTHCPHYS)paPfns[iPage] << PAGE_SHIFT;
767	}
768
769	size_t iMdl = iPage / (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
770	size_t iMdlPfn = iPage % (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
771	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[iMdl]);
772	return (RTHCPHYS)paPfns[iMdlPfn] << PAGE_SHIFT;
773	}
774
775	switch (pMemNt->Core.enmType)
776	{
777	case RTR0MEMOBJTYPE_MAPPING:
778	return rtR0MemObjNativeGetPagePhysAddr(pMemNt->Core.uRel.Child.pParent, iPage);
779
780	case RTR0MEMOBJTYPE_PHYS:
781	return pMemNt->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
782
783	case RTR0MEMOBJTYPE_PAGE:
784	case RTR0MEMOBJTYPE_PHYS_NC:
785	case RTR0MEMOBJTYPE_LOW:
786	case RTR0MEMOBJTYPE_CONT:
787	case RTR0MEMOBJTYPE_LOCK:
788	default:
789	AssertMsgFailed(("%d\n", pMemNt->Core.enmType));
790	case RTR0MEMOBJTYPE_RES_VIRT:
791	return NIL_RTHCPHYS;
792	}
793	}
794

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source: vbox/trunk/src/VBox/Runtime/r0drv/nt/memobj-r0drv-nt.cpp@ 7458

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