memobj-r0drv.cpp@ 75056

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1	/* $Id: memobj-r0drv.cpp 69111 2017-10-17 14:26:02Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, Common Code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2017 Oracle Corporation
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	#define LOG_GROUP RTLOGGROUP_DEFAULT /// @todo RTLOGGROUP_MEM
32	#define RTMEM_NO_WRAP_TO_EF_APIS /* circular dependency otherwise. */
33	#include <iprt/memobj.h>
34	#include "internal/iprt.h"
35
36	#include <iprt/alloc.h>
37	#include <iprt/asm.h>
38	#include <iprt/assert.h>
39	#include <iprt/err.h>
40	#include <iprt/log.h>
41	#include <iprt/mp.h>
42	#include <iprt/param.h>
43	#include <iprt/process.h>
44	#include <iprt/thread.h>
45
46	#include "internal/memobj.h"
47
48
49	/**
50	* Internal function for allocating a new memory object.
51	*
52	* @returns The allocated and initialized handle.
53	* @param cbSelf The size of the memory object handle. 0 mean default size.
54	* @param enmType The memory object type.
55	* @param pv The memory object mapping.
56	* @param cb The size of the memory object.
57	*/
58	DECLHIDDEN(PRTR0MEMOBJINTERNAL) rtR0MemObjNew(size_t cbSelf, RTR0MEMOBJTYPE enmType, void *pv, size_t cb)
59	{
60	PRTR0MEMOBJINTERNAL pNew;
61
62	/* validate the size */
63	if (!cbSelf)
64	cbSelf = sizeof(*pNew);
65	Assert(cbSelf >= sizeof(*pNew));
66	Assert(cbSelf == (uint32_t)cbSelf);
67	AssertMsg(RT_ALIGN_Z(cb, PAGE_SIZE) == cb, ("%#zx\n", cb));
68
69	/*
70	* Allocate and initialize the object.
71	*/
72	pNew = (PRTR0MEMOBJINTERNAL)RTMemAllocZ(cbSelf);
73	if (pNew)
74	{
75	pNew->u32Magic = RTR0MEMOBJ_MAGIC;
76	pNew->cbSelf = (uint32_t)cbSelf;
77	pNew->enmType = enmType;
78	pNew->fFlags = 0;
79	pNew->cb = cb;
80	pNew->pv = pv;
81	}
82	return pNew;
83	}
84
85
86	/**
87	* Deletes an incomplete memory object.
88	*
89	* This is for cleaning up after failures during object creation.
90	*
91	* @param pMem The incomplete memory object to delete.
92	*/
93	DECLHIDDEN(void) rtR0MemObjDelete(PRTR0MEMOBJINTERNAL pMem)
94	{
95	if (pMem)
96	{
97	ASMAtomicUoWriteU32(&pMem->u32Magic, ~RTR0MEMOBJ_MAGIC);
98	pMem->enmType = RTR0MEMOBJTYPE_END;
99	RTMemFree(pMem);
100	}
101	}
102
103
104	/**
105	* Links a mapping object to a primary object.
106	*
107	* @returns IPRT status code.
108	* @retval VINF_SUCCESS on success.
109	* @retval VINF_NO_MEMORY if we couldn't expand the mapping array of the parent.
110	* @param pParent The parent (primary) memory object.
111	* @param pChild The child (mapping) memory object.
112	*/
113	static int rtR0MemObjLink(PRTR0MEMOBJINTERNAL pParent, PRTR0MEMOBJINTERNAL pChild)
114	{
115	uint32_t i;
116
117	/* sanity */
118	Assert(rtR0MemObjIsMapping(pChild));
119	Assert(!rtR0MemObjIsMapping(pParent));
120
121	/* expand the array? */
122	i = pParent->uRel.Parent.cMappings;
123	if (i >= pParent->uRel.Parent.cMappingsAllocated)
124	{
125	void *pv = RTMemRealloc(pParent->uRel.Parent.papMappings,
126	(i + 32) * sizeof(pParent->uRel.Parent.papMappings[0]));
127	if (!pv)
128	return VERR_NO_MEMORY;
129	pParent->uRel.Parent.papMappings = (PPRTR0MEMOBJINTERNAL)pv;
130	pParent->uRel.Parent.cMappingsAllocated = i + 32;
131	Assert(i == pParent->uRel.Parent.cMappings);
132	}
133
134	/* do the linking. */
135	pParent->uRel.Parent.papMappings[i] = pChild;
136	pParent->uRel.Parent.cMappings++;
137	pChild->uRel.Child.pParent = pParent;
138
139	return VINF_SUCCESS;
140	}
141
142
143	/**
144	* Checks if this is mapping or not.
145	*
146	* @returns true if it's a mapping, otherwise false.
147	* @param MemObj The ring-0 memory object handle.
148	*/
149	RTR0DECL(bool) RTR0MemObjIsMapping(RTR0MEMOBJ MemObj)
150	{
151	/* Validate the object handle. */
152	PRTR0MEMOBJINTERNAL pMem;
153	AssertPtrReturn(MemObj, false);
154	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
155	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), false);
156	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), false);
157
158	/* hand it on to the inlined worker. */
159	return rtR0MemObjIsMapping(pMem);
160	}
161	RT_EXPORT_SYMBOL(RTR0MemObjIsMapping);
162
163
164	/**
165	* Gets the address of a ring-0 memory object.
166	*
167	* @returns The address of the memory object.
168	* @returns NULL if the handle is invalid (asserts in strict builds) or if there isn't any mapping.
169	* @param MemObj The ring-0 memory object handle.
170	*/
171	RTR0DECL(void *) RTR0MemObjAddress(RTR0MEMOBJ MemObj)
172	{
173	/* Validate the object handle. */
174	PRTR0MEMOBJINTERNAL pMem;
175	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
176	return NULL;
177	AssertPtrReturn(MemObj, NULL);
178	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
179	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NULL);
180	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NULL);
181
182	/* return the mapping address. */
183	return pMem->pv;
184	}
185	RT_EXPORT_SYMBOL(RTR0MemObjAddress);
186
187
188	/**
189	* Gets the ring-3 address of a ring-0 memory object.
190	*
191	* This only applies to ring-0 memory object with ring-3 mappings of some kind, i.e.
192	* locked user memory, reserved user address space and user mappings. This API should
193	* not be used on any other objects.
194	*
195	* @returns The address of the memory object.
196	* @returns NIL_RTR3PTR if the handle is invalid or if it's not an object with a ring-3 mapping.
197	* Strict builds will assert in both cases.
198	* @param MemObj The ring-0 memory object handle.
199	*/
200	RTR0DECL(RTR3PTR) RTR0MemObjAddressR3(RTR0MEMOBJ MemObj)
201	{
202	PRTR0MEMOBJINTERNAL pMem;
203
204	/* Validate the object handle. */
205	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
206	return NIL_RTR3PTR;
207	AssertPtrReturn(MemObj, NIL_RTR3PTR);
208	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
209	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NIL_RTR3PTR);
210	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NIL_RTR3PTR);
211	if (RT_UNLIKELY( ( pMem->enmType != RTR0MEMOBJTYPE_MAPPING
212	\|\| pMem->u.Mapping.R0Process == NIL_RTR0PROCESS)
213	&& ( pMem->enmType != RTR0MEMOBJTYPE_LOCK
214	\|\| pMem->u.Lock.R0Process == NIL_RTR0PROCESS)
215	&& ( pMem->enmType != RTR0MEMOBJTYPE_PHYS_NC
216	\|\| pMem->u.Lock.R0Process == NIL_RTR0PROCESS)
217	&& ( pMem->enmType != RTR0MEMOBJTYPE_RES_VIRT
218	\|\| pMem->u.ResVirt.R0Process == NIL_RTR0PROCESS)))
219	return NIL_RTR3PTR;
220
221	/* return the mapping address. */
222	return (RTR3PTR)pMem->pv;
223	}
224	RT_EXPORT_SYMBOL(RTR0MemObjAddressR3);
225
226
227	/**
228	* Gets the size of a ring-0 memory object.
229	*
230	* The returned value may differ from the one specified to the API creating the
231	* object because of alignment adjustments. The minimal alignment currently
232	* employed by any API is PAGE_SIZE, so the result can safely be shifted by
233	* PAGE_SHIFT to calculate a page count.
234	*
235	* @returns The object size.
236	* @returns 0 if the handle is invalid (asserts in strict builds) or if there isn't any mapping.
237	* @param MemObj The ring-0 memory object handle.
238	*/
239	RTR0DECL(size_t) RTR0MemObjSize(RTR0MEMOBJ MemObj)
240	{
241	PRTR0MEMOBJINTERNAL pMem;
242
243	/* Validate the object handle. */
244	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
245	return 0;
246	AssertPtrReturn(MemObj, 0);
247	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
248	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), 0);
249	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), 0);
250	AssertMsg(RT_ALIGN_Z(pMem->cb, PAGE_SIZE) == pMem->cb, ("%#zx\n", pMem->cb));
251
252	/* return the size. */
253	return pMem->cb;
254	}
255	RT_EXPORT_SYMBOL(RTR0MemObjSize);
256
257
258	/**
259	* Get the physical address of an page in the memory object.
260	*
261	* @returns The physical address.
262	* @returns NIL_RTHCPHYS if the object doesn't contain fixed physical pages.
263	* @returns NIL_RTHCPHYS if the iPage is out of range.
264	* @returns NIL_RTHCPHYS if the object handle isn't valid.
265	* @param MemObj The ring-0 memory object handle.
266	* @param iPage The page number within the object.
267	*/
268	/* Work around gcc bug 55940 */
269	#if defined(__GNUC__) && defined(RT_ARCH_X86) && (__GNUC__ * 100 + __GNUC_MINOR__) == 407
270	__attribute__((__optimize__ ("no-shrink-wrap")))
271	#endif
272	RTR0DECL(RTHCPHYS) RTR0MemObjGetPagePhysAddr(RTR0MEMOBJ MemObj, size_t iPage)
273	{
274	/* Validate the object handle. */
275	PRTR0MEMOBJINTERNAL pMem;
276	size_t cPages;
277	AssertPtrReturn(MemObj, NIL_RTHCPHYS);
278	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
279	AssertReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, NIL_RTHCPHYS);
280	AssertReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, NIL_RTHCPHYS);
281	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NIL_RTHCPHYS);
282	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NIL_RTHCPHYS);
283	cPages = (pMem->cb >> PAGE_SHIFT);
284	if (iPage >= cPages)
285	{
286	/* permit: while (RTR0MemObjGetPagePhysAddr(pMem, iPage++) != NIL_RTHCPHYS) {} */
287	if (iPage == cPages)
288	return NIL_RTHCPHYS;
289	AssertReturn(iPage < (pMem->cb >> PAGE_SHIFT), NIL_RTHCPHYS);
290	}
291
292	/*
293	* We know the address of physically contiguous allocations and mappings.
294	*/
295	if (pMem->enmType == RTR0MEMOBJTYPE_CONT)
296	return pMem->u.Cont.Phys + iPage * PAGE_SIZE;
297	if (pMem->enmType == RTR0MEMOBJTYPE_PHYS)
298	return pMem->u.Phys.PhysBase + iPage * PAGE_SIZE;
299
300	/*
301	* Do the job.
302	*/
303	return rtR0MemObjNativeGetPagePhysAddr(pMem, iPage);
304	}
305	RT_EXPORT_SYMBOL(RTR0MemObjGetPagePhysAddr);
306
307
308	/**
309	* Frees a ring-0 memory object.
310	*
311	* @returns IPRT status code.
312	* @retval VERR_INVALID_HANDLE if
313	* @param MemObj The ring-0 memory object to be freed. NULL is accepted.
314	* @param fFreeMappings Whether or not to free mappings of the object.
315	*/
316	RTR0DECL(int) RTR0MemObjFree(RTR0MEMOBJ MemObj, bool fFreeMappings)
317	{
318	/*
319	* Validate the object handle.
320	*/
321	PRTR0MEMOBJINTERNAL pMem;
322	int rc;
323
324	if (MemObj == NIL_RTR0MEMOBJ)
325	return VINF_SUCCESS;
326	AssertPtrReturn(MemObj, VERR_INVALID_HANDLE);
327	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
328	AssertReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
329	AssertReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
330	RT_ASSERT_PREEMPTIBLE();
331
332	/*
333	* Deal with mappings according to fFreeMappings.
334	*/
335	if ( !rtR0MemObjIsMapping(pMem)
336	&& pMem->uRel.Parent.cMappings > 0)
337	{
338	/* fail if not requested to free mappings. */
339	if (!fFreeMappings)
340	return VERR_MEMORY_BUSY;
341
342	while (pMem->uRel.Parent.cMappings > 0)
343	{
344	PRTR0MEMOBJINTERNAL pChild = pMem->uRel.Parent.papMappings[--pMem->uRel.Parent.cMappings];
345	pMem->uRel.Parent.papMappings[pMem->uRel.Parent.cMappings] = NULL;
346
347	/* sanity checks. */
348	AssertPtr(pChild);
349	AssertFatal(pChild->u32Magic == RTR0MEMOBJ_MAGIC);
350	AssertFatal(pChild->enmType > RTR0MEMOBJTYPE_INVALID && pChild->enmType < RTR0MEMOBJTYPE_END);
351	AssertFatal(rtR0MemObjIsMapping(pChild));
352
353	/* free the mapping. */
354	rc = rtR0MemObjNativeFree(pChild);
355	if (RT_FAILURE(rc))
356	{
357	Log(("RTR0MemObjFree: failed to free mapping %p: %p %#zx; rc=%Rrc\n", pChild, pChild->pv, pChild->cb, rc));
358	pMem->uRel.Parent.papMappings[pMem->uRel.Parent.cMappings++] = pChild;
359	return rc;
360	}
361	}
362	}
363
364	/*
365	* Free this object.
366	*/
367	rc = rtR0MemObjNativeFree(pMem);
368	if (RT_SUCCESS(rc))
369	{
370	/*
371	* Ok, it was freed just fine. Now, if it's a mapping we'll have to remove it from the parent.
372	*/
373	if (rtR0MemObjIsMapping(pMem))
374	{
375	PRTR0MEMOBJINTERNAL pParent = pMem->uRel.Child.pParent;
376	uint32_t i;
377
378	/* sanity checks */
379	AssertPtr(pParent);
380	AssertFatal(pParent->u32Magic == RTR0MEMOBJ_MAGIC);
381	AssertFatal(pParent->enmType > RTR0MEMOBJTYPE_INVALID && pParent->enmType < RTR0MEMOBJTYPE_END);
382	AssertFatal(!rtR0MemObjIsMapping(pParent));
383	AssertFatal(pParent->uRel.Parent.cMappings > 0);
384	AssertPtr(pParent->uRel.Parent.papMappings);
385
386	/* locate and remove from the array of mappings. */
387	i = pParent->uRel.Parent.cMappings;
388	while (i-- > 0)
389	{
390	if (pParent->uRel.Parent.papMappings[i] == pMem)
391	{
392	pParent->uRel.Parent.papMappings[i] = pParent->uRel.Parent.papMappings[--pParent->uRel.Parent.cMappings];
393	break;
394	}
395	}
396	Assert(i != UINT32_MAX);
397	}
398	else
399	Assert(pMem->uRel.Parent.cMappings == 0);
400
401	/*
402	* Finally, destroy the handle.
403	*/
404	pMem->u32Magic++;
405	pMem->enmType = RTR0MEMOBJTYPE_END;
406	if (!rtR0MemObjIsMapping(pMem))
407	RTMemFree(pMem->uRel.Parent.papMappings);
408	RTMemFree(pMem);
409	}
410	else
411	Log(("RTR0MemObjFree: failed to free %p: %d %p %#zx; rc=%Rrc\n",
412	pMem, pMem->enmType, pMem->pv, pMem->cb, rc));
413	return rc;
414	}
415	RT_EXPORT_SYMBOL(RTR0MemObjFree);
416
417
418
419	RTR0DECL(int) RTR0MemObjAllocPageTag(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable, const char *pszTag)
420	{
421	/* sanity checks. */
422	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
423	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
424	*pMemObj = NIL_RTR0MEMOBJ;
425	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
426	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
427	RT_ASSERT_PREEMPTIBLE();
428
429	RT_NOREF_PV(pszTag);
430
431	/* do the allocation. */
432	return rtR0MemObjNativeAllocPage(pMemObj, cbAligned, fExecutable);
433	}
434	RT_EXPORT_SYMBOL(RTR0MemObjAllocPageTag);
435
436
437	RTR0DECL(int) RTR0MemObjAllocLowTag(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable, const char *pszTag)
438	{
439	/* sanity checks. */
440	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
441	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
442	*pMemObj = NIL_RTR0MEMOBJ;
443	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
444	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
445	RT_ASSERT_PREEMPTIBLE();
446
447	RT_NOREF_PV(pszTag);
448
449	/* do the allocation. */
450	return rtR0MemObjNativeAllocLow(pMemObj, cbAligned, fExecutable);
451	}
452	RT_EXPORT_SYMBOL(RTR0MemObjAllocLowTag);
453
454
455	RTR0DECL(int) RTR0MemObjAllocContTag(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable, const char *pszTag)
456	{
457	/* sanity checks. */
458	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
459	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
460	*pMemObj = NIL_RTR0MEMOBJ;
461	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
462	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
463	RT_ASSERT_PREEMPTIBLE();
464
465	RT_NOREF_PV(pszTag);
466
467	/* do the allocation. */
468	return rtR0MemObjNativeAllocCont(pMemObj, cbAligned, fExecutable);
469	}
470	RT_EXPORT_SYMBOL(RTR0MemObjAllocContTag);
471
472
473	RTR0DECL(int) RTR0MemObjLockUserTag(PRTR0MEMOBJ pMemObj, RTR3PTR R3Ptr, size_t cb,
474	uint32_t fAccess, RTR0PROCESS R0Process, const char *pszTag)
475	{
476	/* sanity checks. */
477	const size_t cbAligned = RT_ALIGN_Z(cb + (R3Ptr & PAGE_OFFSET_MASK), PAGE_SIZE);
478	RTR3PTR const R3PtrAligned = (R3Ptr & ~(RTR3PTR)PAGE_OFFSET_MASK);
479	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
480	*pMemObj = NIL_RTR0MEMOBJ;
481	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
482	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
483	if (R0Process == NIL_RTR0PROCESS)
484	R0Process = RTR0ProcHandleSelf();
485	AssertReturn(!(fAccess & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE)), VERR_INVALID_PARAMETER);
486	AssertReturn(fAccess, VERR_INVALID_PARAMETER);
487	RT_ASSERT_PREEMPTIBLE();
488
489	RT_NOREF_PV(pszTag);
490
491	/* do the locking. */
492	return rtR0MemObjNativeLockUser(pMemObj, R3PtrAligned, cbAligned, fAccess, R0Process);
493	}
494	RT_EXPORT_SYMBOL(RTR0MemObjLockUserTag);
495
496
497	RTR0DECL(int) RTR0MemObjLockKernelTag(PRTR0MEMOBJ pMemObj, void pv, size_t cb, uint32_t fAccess, const char pszTag)
498	{
499	/* sanity checks. */
500	const size_t cbAligned = RT_ALIGN_Z(cb + ((uintptr_t)pv & PAGE_OFFSET_MASK), PAGE_SIZE);
501	void * const pvAligned = (void *)((uintptr_t)pv & ~(uintptr_t)PAGE_OFFSET_MASK);
502	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
503	*pMemObj = NIL_RTR0MEMOBJ;
504	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
505	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
506	AssertPtrReturn(pvAligned, VERR_INVALID_POINTER);
507	AssertReturn(!(fAccess & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE)), VERR_INVALID_PARAMETER);
508	AssertReturn(fAccess, VERR_INVALID_PARAMETER);
509	RT_ASSERT_PREEMPTIBLE();
510
511	RT_NOREF_PV(pszTag);
512
513	/* do the allocation. */
514	return rtR0MemObjNativeLockKernel(pMemObj, pvAligned, cbAligned, fAccess);
515	}
516	RT_EXPORT_SYMBOL(RTR0MemObjLockKernelTag);
517
518
519	RTR0DECL(int) RTR0MemObjAllocPhysTag(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, const char *pszTag)
520	{
521	/* sanity checks. */
522	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
523	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
524	*pMemObj = NIL_RTR0MEMOBJ;
525	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
526	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
527	AssertReturn(PhysHighest >= cb, VERR_INVALID_PARAMETER);
528	RT_ASSERT_PREEMPTIBLE();
529
530	RT_NOREF_PV(pszTag);
531
532	/* do the allocation. */
533	return rtR0MemObjNativeAllocPhys(pMemObj, cbAligned, PhysHighest, PAGE_SIZE /* page aligned */);
534	}
535	RT_EXPORT_SYMBOL(RTR0MemObjAllocPhysTag);
536
537
538	RTR0DECL(int) RTR0MemObjAllocPhysExTag(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment, const char *pszTag)
539	{
540	/* sanity checks. */
541	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
542	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
543	*pMemObj = NIL_RTR0MEMOBJ;
544	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
545	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
546	AssertReturn(PhysHighest >= cb, VERR_INVALID_PARAMETER);
547	if (uAlignment == 0)
548	uAlignment = PAGE_SIZE;
549	AssertReturn( uAlignment == PAGE_SIZE
550	\|\| uAlignment == _2M
551	\|\| uAlignment == _4M
552	\|\| uAlignment == _1G,
553	VERR_INVALID_PARAMETER);
554	#if HC_ARCH_BITS == 32
555	/* Memory allocated in this way is typically mapped into kernel space as well; simply
556	don't allow this on 32 bits hosts as the kernel space is too crowded already. */
557	if (uAlignment != PAGE_SIZE)
558	return VERR_NOT_SUPPORTED;
559	#endif
560	RT_ASSERT_PREEMPTIBLE();
561
562	RT_NOREF_PV(pszTag);
563
564	/* do the allocation. */
565	return rtR0MemObjNativeAllocPhys(pMemObj, cbAligned, PhysHighest, uAlignment);
566	}
567	RT_EXPORT_SYMBOL(RTR0MemObjAllocPhysExTag);
568
569
570	RTR0DECL(int) RTR0MemObjAllocPhysNCTag(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, const char *pszTag)
571	{
572	/* sanity checks. */
573	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
574	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
575	*pMemObj = NIL_RTR0MEMOBJ;
576	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
577	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
578	AssertReturn(PhysHighest >= cb, VERR_INVALID_PARAMETER);
579	RT_ASSERT_PREEMPTIBLE();
580
581	RT_NOREF_PV(pszTag);
582
583	/* do the allocation. */
584	return rtR0MemObjNativeAllocPhysNC(pMemObj, cbAligned, PhysHighest);
585	}
586	RT_EXPORT_SYMBOL(RTR0MemObjAllocPhysNCTag);
587
588
589	RTR0DECL(int) RTR0MemObjEnterPhysTag(PRTR0MEMOBJ pMemObj, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy, const char *pszTag)
590	{
591	/* sanity checks. */
592	const size_t cbAligned = RT_ALIGN_Z(cb + (Phys & PAGE_OFFSET_MASK), PAGE_SIZE);
593	const RTHCPHYS PhysAligned = Phys & ~(RTHCPHYS)PAGE_OFFSET_MASK;
594	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
595	*pMemObj = NIL_RTR0MEMOBJ;
596	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
597	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
598	AssertReturn(Phys != NIL_RTHCPHYS, VERR_INVALID_PARAMETER);
599	AssertReturn( uCachePolicy == RTMEM_CACHE_POLICY_DONT_CARE
600	\|\| uCachePolicy == RTMEM_CACHE_POLICY_MMIO,
601	VERR_INVALID_PARAMETER);
602	RT_ASSERT_PREEMPTIBLE();
603
604	RT_NOREF_PV(pszTag);
605
606	/* do the allocation. */
607	return rtR0MemObjNativeEnterPhys(pMemObj, PhysAligned, cbAligned, uCachePolicy);
608	}
609	RT_EXPORT_SYMBOL(RTR0MemObjEnterPhysTag);
610
611
612	RTR0DECL(int) RTR0MemObjReserveKernelTag(PRTR0MEMOBJ pMemObj, void pvFixed, size_t cb, size_t uAlignment, const char pszTag)
613	{
614	/* sanity checks. */
615	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
616	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
617	*pMemObj = NIL_RTR0MEMOBJ;
618	if (uAlignment == 0)
619	uAlignment = PAGE_SIZE;
620	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
621	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
622	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
623	if (pvFixed != (void *)-1)
624	AssertReturn(!((uintptr_t)pvFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
625	RT_ASSERT_PREEMPTIBLE();
626
627	RT_NOREF_PV(pszTag);
628
629	/* do the reservation. */
630	return rtR0MemObjNativeReserveKernel(pMemObj, pvFixed, cbAligned, uAlignment);
631	}
632	RT_EXPORT_SYMBOL(RTR0MemObjReserveKernelTag);
633
634
635	RTR0DECL(int) RTR0MemObjReserveUserTag(PRTR0MEMOBJ pMemObj, RTR3PTR R3PtrFixed, size_t cb,
636	size_t uAlignment, RTR0PROCESS R0Process, const char *pszTag)
637	{
638	/* sanity checks. */
639	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
640	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
641	*pMemObj = NIL_RTR0MEMOBJ;
642	if (uAlignment == 0)
643	uAlignment = PAGE_SIZE;
644	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
645	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
646	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
647	if (R3PtrFixed != (RTR3PTR)-1)
648	AssertReturn(!(R3PtrFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
649	if (R0Process == NIL_RTR0PROCESS)
650	R0Process = RTR0ProcHandleSelf();
651	RT_ASSERT_PREEMPTIBLE();
652
653	RT_NOREF_PV(pszTag);
654
655	/* do the reservation. */
656	return rtR0MemObjNativeReserveUser(pMemObj, R3PtrFixed, cbAligned, uAlignment, R0Process);
657	}
658	RT_EXPORT_SYMBOL(RTR0MemObjReserveUserTag);
659
660
661	RTR0DECL(int) RTR0MemObjMapKernelTag(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, void *pvFixed,
662	size_t uAlignment, unsigned fProt, const char *pszTag)
663	{
664	return RTR0MemObjMapKernelExTag(pMemObj, MemObjToMap, pvFixed, uAlignment, fProt, 0, 0, pszTag);
665	}
666	RT_EXPORT_SYMBOL(RTR0MemObjMapKernelTag);
667
668
669	RTR0DECL(int) RTR0MemObjMapKernelExTag(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, void *pvFixed, size_t uAlignment,
670	unsigned fProt, size_t offSub, size_t cbSub, const char *pszTag)
671	{
672	PRTR0MEMOBJINTERNAL pMemToMap;
673	PRTR0MEMOBJINTERNAL pNew;
674	int rc;
675
676	/* sanity checks. */
677	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
678	*pMemObj = NIL_RTR0MEMOBJ;
679	AssertPtrReturn(MemObjToMap, VERR_INVALID_HANDLE);
680	pMemToMap = (PRTR0MEMOBJINTERNAL)MemObjToMap;
681	AssertReturn(pMemToMap->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
682	AssertReturn(pMemToMap->enmType > RTR0MEMOBJTYPE_INVALID && pMemToMap->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
683	AssertReturn(!rtR0MemObjIsMapping(pMemToMap), VERR_INVALID_PARAMETER);
684	AssertReturn(pMemToMap->enmType != RTR0MEMOBJTYPE_RES_VIRT, VERR_INVALID_PARAMETER);
685	if (uAlignment == 0)
686	uAlignment = PAGE_SIZE;
687	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
688	if (pvFixed != (void *)-1)
689	AssertReturn(!((uintptr_t)pvFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
690	AssertReturn(fProt != RTMEM_PROT_NONE, VERR_INVALID_PARAMETER);
691	AssertReturn(!(fProt & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
692	AssertReturn(!(offSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
693	AssertReturn(offSub < pMemToMap->cb, VERR_INVALID_PARAMETER);
694	AssertReturn(!(cbSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
695	AssertReturn(cbSub <= pMemToMap->cb, VERR_INVALID_PARAMETER);
696	AssertReturn((!offSub && !cbSub) \|\| (offSub + cbSub) <= pMemToMap->cb, VERR_INVALID_PARAMETER);
697	RT_ASSERT_PREEMPTIBLE();
698
699	RT_NOREF_PV(pszTag);
700
701	/* adjust the request to simplify the native code. */
702	if (offSub == 0 && cbSub == pMemToMap->cb)
703	cbSub = 0;
704
705	/* do the mapping. */
706	rc = rtR0MemObjNativeMapKernel(&pNew, pMemToMap, pvFixed, uAlignment, fProt, offSub, cbSub);
707	if (RT_SUCCESS(rc))
708	{
709	/* link it. */
710	rc = rtR0MemObjLink(pMemToMap, pNew);
711	if (RT_SUCCESS(rc))
712	*pMemObj = pNew;
713	else
714	{
715	/* damn, out of memory. bail out. */
716	int rc2 = rtR0MemObjNativeFree(pNew);
717	AssertRC(rc2);
718	pNew->u32Magic++;
719	pNew->enmType = RTR0MEMOBJTYPE_END;
720	RTMemFree(pNew);
721	}
722	}
723
724	return rc;
725	}
726	RT_EXPORT_SYMBOL(RTR0MemObjMapKernelExTag);
727
728
729	RTR0DECL(int) RTR0MemObjMapUserTag(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, RTR3PTR R3PtrFixed,
730	size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process, const char *pszTag)
731	{
732	/* sanity checks. */
733	PRTR0MEMOBJINTERNAL pMemToMap;
734	PRTR0MEMOBJINTERNAL pNew;
735	int rc;
736	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
737	pMemToMap = (PRTR0MEMOBJINTERNAL)MemObjToMap;
738	*pMemObj = NIL_RTR0MEMOBJ;
739	AssertPtrReturn(MemObjToMap, VERR_INVALID_HANDLE);
740	AssertReturn(pMemToMap->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
741	AssertReturn(pMemToMap->enmType > RTR0MEMOBJTYPE_INVALID && pMemToMap->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
742	AssertReturn(!rtR0MemObjIsMapping(pMemToMap), VERR_INVALID_PARAMETER);
743	AssertReturn(pMemToMap->enmType != RTR0MEMOBJTYPE_RES_VIRT, VERR_INVALID_PARAMETER);
744	if (uAlignment == 0)
745	uAlignment = PAGE_SIZE;
746	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
747	if (R3PtrFixed != (RTR3PTR)-1)
748	AssertReturn(!(R3PtrFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
749	AssertReturn(fProt != RTMEM_PROT_NONE, VERR_INVALID_PARAMETER);
750	AssertReturn(!(fProt & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
751	if (R0Process == NIL_RTR0PROCESS)
752	R0Process = RTR0ProcHandleSelf();
753	RT_ASSERT_PREEMPTIBLE();
754
755	RT_NOREF_PV(pszTag);
756
757	/* do the mapping. */
758	rc = rtR0MemObjNativeMapUser(&pNew, pMemToMap, R3PtrFixed, uAlignment, fProt, R0Process);
759	if (RT_SUCCESS(rc))
760	{
761	/* link it. */
762	rc = rtR0MemObjLink(pMemToMap, pNew);
763	if (RT_SUCCESS(rc))
764	*pMemObj = pNew;
765	else
766	{
767	/* damn, out of memory. bail out. */
768	int rc2 = rtR0MemObjNativeFree(pNew);
769	AssertRC(rc2);
770	pNew->u32Magic++;
771	pNew->enmType = RTR0MEMOBJTYPE_END;
772	RTMemFree(pNew);
773	}
774	}
775
776	return rc;
777	}
778	RT_EXPORT_SYMBOL(RTR0MemObjMapUserTag);
779
780
781	RTR0DECL(int) RTR0MemObjProtect(RTR0MEMOBJ hMemObj, size_t offSub, size_t cbSub, uint32_t fProt)
782	{
783	PRTR0MEMOBJINTERNAL pMemObj;
784	int rc;
785
786	/* sanity checks. */
787	pMemObj = (PRTR0MEMOBJINTERNAL)hMemObj;
788	AssertPtrReturn(pMemObj, VERR_INVALID_HANDLE);
789	AssertReturn(pMemObj->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
790	AssertReturn(pMemObj->enmType > RTR0MEMOBJTYPE_INVALID && pMemObj->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
791	AssertReturn(rtR0MemObjIsProtectable(pMemObj), VERR_INVALID_PARAMETER);
792	AssertReturn(!(offSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
793	AssertReturn(offSub < pMemObj->cb, VERR_INVALID_PARAMETER);
794	AssertReturn(!(cbSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
795	AssertReturn(cbSub <= pMemObj->cb, VERR_INVALID_PARAMETER);
796	AssertReturn(offSub + cbSub <= pMemObj->cb, VERR_INVALID_PARAMETER);
797	AssertReturn(!(fProt & ~(RTMEM_PROT_NONE \| RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
798	RT_ASSERT_PREEMPTIBLE();
799
800	/* do the job */
801	rc = rtR0MemObjNativeProtect(pMemObj, offSub, cbSub, fProt);
802	if (RT_SUCCESS(rc))
803	pMemObj->fFlags \|= RTR0MEMOBJ_FLAGS_PROT_CHANGED; /* record it */
804
805	return rc;
806	}
807	RT_EXPORT_SYMBOL(RTR0MemObjProtect);
808

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source: vbox/trunk/src/VBox/Runtime/r0drv/memobj-r0drv.cpp@ 75056

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