memobj-r0drv.cpp@ 5617

Last change on this file since 5617 was 4819, checked in by vboxsync, 17 years ago
Don't assert on invalid handles as it upsets the dprintf2 logging in vboxdrv.
Property svn:eol-style set to `native` Property svn:keywords set to `Id Rev`
File size: 28.7 KB

Line
1	/* $Revision: 4819 $ */
2	/** @file
3	* innotek Portable Runtime - Ring-0 Memory Objects, Common Code.
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	#define LOG_GROUP RTLOGGROUP_DEFAULT ///@todo RTLOGGROUP_MEM
23	#include <iprt/memobj.h>
24	#include <iprt/alloc.h>
25	#include <iprt/process.h>
26	#include <iprt/assert.h>
27	#include <iprt/err.h>
28	#include <iprt/log.h>
29	#include <iprt/param.h>
30	#include "internal/memobj.h"
31
32
33	/**
34	* Internal function for allocating a new memory object.
35	*
36	* @returns The allocated and initialized handle.
37	* @param cbSelf The size of the memory object handle. 0 mean default size.
38	* @param enmType The memory object type.
39	* @param pv The memory object mapping.
40	* @param cb The size of the memory object.
41	*/
42	PRTR0MEMOBJINTERNAL rtR0MemObjNew(size_t cbSelf, RTR0MEMOBJTYPE enmType, void *pv, size_t cb)
43	{
44	PRTR0MEMOBJINTERNAL pNew;
45
46	/* validate the size */
47	if (!cbSelf)
48	cbSelf = sizeof(*pNew);
49	Assert(cbSelf >= sizeof(*pNew));
50	Assert(cbSelf == (uint32_t)cbSelf);
51
52	/*
53	* Allocate and initialize the object.
54	*/
55	pNew = (PRTR0MEMOBJINTERNAL)RTMemAllocZ(cbSelf);
56	if (pNew)
57	{
58	pNew->u32Magic = RTR0MEMOBJ_MAGIC;
59	pNew->cbSelf = (uint32_t)cbSelf;
60	pNew->enmType = enmType;
61	pNew->cb = cb;
62	pNew->pv = pv;
63	}
64	return pNew;
65	}
66
67
68	/**
69	* Deletes an incomplete memory object.
70	*
71	* This is for cleaning up after failures during object creation.
72	*
73	* @param pMem The incomplete memory object to delete.
74	*/
75	void rtR0MemObjDelete(PRTR0MEMOBJINTERNAL pMem)
76	{
77	if (pMem)
78	{
79	pMem->u32Magic++;
80	pMem->enmType = RTR0MEMOBJTYPE_END;
81	RTMemFree(pMem);
82	}
83	}
84
85
86	/**
87	* Links a mapping object to a primary object.
88	*
89	* @returns IPRT status code.
90	* @retval VINF_SUCCESS on success.
91	* @retval VINF_NO_MEMORY if we couldn't expand the mapping array of the parent.
92	* @param pParent The parent (primary) memory object.
93	* @param pChild The child (mapping) memory object.
94	*/
95	static int rtR0MemObjLink(PRTR0MEMOBJINTERNAL pParent, PRTR0MEMOBJINTERNAL pChild)
96	{
97	uint32_t i;
98
99	/* sanity */
100	Assert(rtR0MemObjIsMapping(pChild));
101	Assert(!rtR0MemObjIsMapping(pParent));
102
103	/* expand the array? */
104	i = pParent->uRel.Parent.cMappings;
105	if (i >= pParent->uRel.Parent.cMappingsAllocated)
106	{
107	void *pv = RTMemRealloc(pParent->uRel.Parent.papMappings,
108	(i + 32) * sizeof(pParent->uRel.Parent.papMappings[0]));
109	if (!pv)
110	return VERR_NO_MEMORY;
111	pParent->uRel.Parent.papMappings = (PPRTR0MEMOBJINTERNAL)pv;
112	pParent->uRel.Parent.cMappingsAllocated = i + 32;
113	Assert(i == pParent->uRel.Parent.cMappings);
114	}
115
116	/* do the linking. */
117	pParent->uRel.Parent.papMappings[i] = pChild;
118	pParent->uRel.Parent.cMappings++;
119	pChild->uRel.Child.pParent = pParent;
120
121	return VINF_SUCCESS;
122	}
123
124
125	/**
126	* Checks if this is mapping or not.
127	*
128	* @returns true if it's a mapping, otherwise false.
129	* @param MemObj The ring-0 memory object handle.
130	*/
131	RTR0DECL(bool) RTR0MemObjIsMapping(RTR0MEMOBJ MemObj)
132	{
133	/* Validate the object handle. */
134	PRTR0MEMOBJINTERNAL pMem;
135	AssertPtrReturn(MemObj, false);
136	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
137	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), false);
138	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), false);
139
140	/* hand it on to the inlined worker. */
141	return rtR0MemObjIsMapping(pMem);
142	}
143
144
145	/**
146	* Gets the address of a ring-0 memory object.
147	*
148	* @returns The address of the memory object.
149	* @returns NULL if the handle is invalid (asserts in strict builds) or if there isn't any mapping.
150	* @param MemObj The ring-0 memory object handle.
151	*/
152	RTR0DECL(void *) RTR0MemObjAddress(RTR0MEMOBJ MemObj)
153	{
154	/* Validate the object handle. */
155	PRTR0MEMOBJINTERNAL pMem;
156	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
157	return NULL;
158	AssertPtrReturn(MemObj, NULL);
159	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
160	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NULL);
161	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NULL);
162
163	/* return the mapping address. */
164	return pMem->pv;
165	}
166
167
168	/**
169	* Gets the ring-3 address of a ring-0 memory object.
170	*
171	* This only applies to ring-0 memory object with ring-3 mappings of some kind, i.e.
172	* locked user memory, reserved user address space and user mappings. This API should
173	* not be used on any other objects.
174	*
175	* @returns The address of the memory object.
176	* @returns NIL_RTR3PTR if the handle is invalid or if it's not an object with a ring-3 mapping.
177	* Strict builds will assert in both cases.
178	* @param MemObj The ring-0 memory object handle.
179	*/
180	RTR0DECL(RTR3PTR) RTR0MemObjAddressR3(RTR0MEMOBJ MemObj)
181	{
182	PRTR0MEMOBJINTERNAL pMem;
183
184	/* Validate the object handle. */
185	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
186	return NIL_RTR3PTR;
187	AssertPtrReturn(MemObj, NIL_RTR3PTR);
188	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
189	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NIL_RTR3PTR);
190	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NIL_RTR3PTR);
191	if (RT_UNLIKELY( ( pMem->enmType != RTR0MEMOBJTYPE_MAPPING
192	\|\| pMem->u.Mapping.R0Process == NIL_RTR0PROCESS)
193	&& ( pMem->enmType != RTR0MEMOBJTYPE_LOCK
194	\|\| pMem->u.Lock.R0Process == NIL_RTR0PROCESS)
195	&& ( pMem->enmType != RTR0MEMOBJTYPE_PHYS_NC
196	\|\| pMem->u.Lock.R0Process == NIL_RTR0PROCESS)
197	&& ( pMem->enmType != RTR0MEMOBJTYPE_RES_VIRT
198	\|\| pMem->u.ResVirt.R0Process == NIL_RTR0PROCESS)))
199	return NIL_RTR3PTR;
200
201	/* return the mapping address. */
202	return (RTR3PTR)pMem->pv;
203	}
204
205
206	/**
207	* Gets the size of a ring-0 memory object.
208	*
209	* @returns The address of the memory object.
210	* @returns 0 if the handle is invalid (asserts in strict builds) or if there isn't any mapping.
211	* @param MemObj The ring-0 memory object handle.
212	*/
213	RTR0DECL(size_t) RTR0MemObjSize(RTR0MEMOBJ MemObj)
214	{
215	PRTR0MEMOBJINTERNAL pMem;
216
217	/* Validate the object handle. */
218	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
219	return 0;
220	AssertPtrReturn(MemObj, 0);
221	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
222	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), 0);
223	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), 0);
224
225	/* return the size. */
226	return pMem->cb;
227	}
228
229
230	/**
231	* Get the physical address of an page in the memory object.
232	*
233	* @returns The physical address.
234	* @returns NIL_RTHCPHYS if the object doesn't contain fixed physical pages.
235	* @returns NIL_RTHCPHYS if the iPage is out of range.
236	* @returns NIL_RTHCPHYS if the object handle isn't valid.
237	* @param MemObj The ring-0 memory object handle.
238	* @param iPage The page number within the object.
239	*/
240	RTR0DECL(RTHCPHYS) RTR0MemObjGetPagePhysAddr(RTR0MEMOBJ MemObj, size_t iPage)
241	{
242	/* Validate the object handle. */
243	PRTR0MEMOBJINTERNAL pMem;
244	size_t cPages;
245	AssertPtrReturn(MemObj, NIL_RTHCPHYS);
246	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
247	AssertReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, NIL_RTHCPHYS);
248	AssertReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, NIL_RTHCPHYS);
249	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NIL_RTHCPHYS);
250	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NIL_RTHCPHYS);
251	cPages = (pMem->cb >> PAGE_SHIFT);
252	if (iPage >= cPages)
253	{
254	/* permit: while (RTR0MemObjGetPagePhysAddr(pMem, iPage++) != NIL_RTHCPHYS) {} */
255	if (iPage == cPages)
256	return NIL_RTHCPHYS;
257	AssertReturn(iPage < (pMem->cb >> PAGE_SHIFT), NIL_RTHCPHYS);
258	}
259
260	/*
261	* We know the address of physically contiguous allocations and mappings.
262	*/
263	if (pMem->enmType == RTR0MEMOBJTYPE_CONT)
264	return pMem->u.Cont.Phys + iPage * PAGE_SIZE;
265	if (pMem->enmType == RTR0MEMOBJTYPE_PHYS)
266	return pMem->u.Phys.PhysBase + iPage * PAGE_SIZE;
267
268	/*
269	* Do the job.
270	*/
271	return rtR0MemObjNativeGetPagePhysAddr(pMem, iPage);
272	}
273
274
275	/**
276	* Frees a ring-0 memory object.
277	*
278	* @returns IPRT status code.
279	* @retval VERR_INVALID_HANDLE if
280	* @param MemObj The ring-0 memory object to be freed. NULL is accepted.
281	* @param fFreeMappings Whether or not to free mappings of the object.
282	*/
283	RTR0DECL(int) RTR0MemObjFree(RTR0MEMOBJ MemObj, bool fFreeMappings)
284	{
285	/*
286	* Validate the object handle.
287	*/
288	PRTR0MEMOBJINTERNAL pMem;
289	int rc;
290
291	if (MemObj == NIL_RTR0MEMOBJ)
292	return VINF_SUCCESS;
293	AssertPtrReturn(MemObj, VERR_INVALID_HANDLE);
294	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
295	AssertReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
296	AssertReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
297
298	/*
299	* Deal with mapings according to fFreeMappings.
300	*/
301	if ( !rtR0MemObjIsMapping(pMem)
302	&& pMem->uRel.Parent.cMappings > 0)
303	{
304	/* fail if not requested to free mappings. */
305	if (!fFreeMappings)
306	return VERR_MEMORY_BUSY;
307
308	while (pMem->uRel.Parent.cMappings > 0)
309	{
310	PRTR0MEMOBJINTERNAL pChild = pMem->uRel.Parent.papMappings[--pMem->uRel.Parent.cMappings];
311	pMem->uRel.Parent.papMappings[pMem->uRel.Parent.cMappings] = NULL;
312
313	/* sanity checks. */
314	AssertPtr(pChild);
315	AssertFatal(pChild->u32Magic == RTR0MEMOBJ_MAGIC);
316	AssertFatal(pChild->enmType > RTR0MEMOBJTYPE_INVALID && pChild->enmType < RTR0MEMOBJTYPE_END);
317	AssertFatal(rtR0MemObjIsMapping(pChild));
318
319	/* free the mapping. */
320	rc = rtR0MemObjNativeFree(pChild);
321	if (RT_FAILURE(rc))
322	{
323	Log(("RTR0MemObjFree: failed to free mapping %p: %p %#zx; rc=%Vrc\n", pChild, pChild->pv, pChild->cb, rc));
324	pMem->uRel.Parent.papMappings[pMem->uRel.Parent.cMappings++] = pChild;
325	return rc;
326	}
327	}
328	}
329
330	/*
331	* Free this object.
332	*/
333	rc = rtR0MemObjNativeFree(pMem);
334	if (RT_SUCCESS(rc))
335	{
336	/*
337	* Ok, it was freed just fine. Now, if it's a mapping we'll have to remove it from the parent.
338	*/
339	if (rtR0MemObjIsMapping(pMem))
340	{
341	PRTR0MEMOBJINTERNAL pParent = pMem->uRel.Child.pParent;
342	uint32_t i;
343
344	/* sanity checks */
345	AssertPtr(pParent);
346	AssertFatal(pParent->u32Magic == RTR0MEMOBJ_MAGIC);
347	AssertFatal(pParent->enmType > RTR0MEMOBJTYPE_INVALID && pParent->enmType < RTR0MEMOBJTYPE_END);
348	AssertFatal(!rtR0MemObjIsMapping(pParent));
349	AssertFatal(pParent->uRel.Parent.cMappings > 0);
350	AssertPtr(pParent->uRel.Parent.papMappings);
351
352	/* locate and remove from the array of mappings. */
353	i = pParent->uRel.Parent.cMappings;
354	while (i-- > 0)
355	{
356	if (pParent->uRel.Parent.papMappings[i] == pMem)
357	{
358	pParent->uRel.Parent.papMappings[i] = pParent->uRel.Parent.papMappings[--pParent->uRel.Parent.cMappings];
359	break;
360	}
361	}
362	Assert(i != UINT32_MAX);
363	}
364	else
365	Assert(pMem->uRel.Parent.cMappings == 0);
366
367	/*
368	* Finally, destroy the handle.
369	*/
370	pMem->u32Magic++;
371	pMem->enmType = RTR0MEMOBJTYPE_END;
372	if (!rtR0MemObjIsMapping(pMem))
373	RTMemFree(pMem->uRel.Parent.papMappings);
374	RTMemFree(pMem);
375	}
376	else
377	Log(("RTR0MemObjFree: failed to free %p: %d %p %#zx; rc=%Vrc\n",
378	pMem, pMem->enmType, pMem->pv, pMem->cb, rc));
379	return rc;
380	}
381
382
383
384	/**
385	* Allocates page aligned virtual kernel memory.
386	*
387	* The memory is taken from a non paged (= fixed physical memory backing) pool.
388	*
389	* @returns IPRT status code.
390	* @param pMemObj Where to store the ring-0 memory object handle.
391	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
392	* @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object.
393	*/
394	RTR0DECL(int) RTR0MemObjAllocPage(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable)
395	{
396	/* sanity checks. */
397	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
398	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
399	*pMemObj = NIL_RTR0MEMOBJ;
400	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
401	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
402
403	/* do the allocation. */
404	return rtR0MemObjNativeAllocPage(pMemObj, cbAligned, fExecutable);
405	}
406
407
408	/**
409	* Allocates page aligned virtual kernel memory with physical backing below 4GB.
410	*
411	* The physical memory backing the allocation is fixed.
412	*
413	* @returns IPRT status code.
414	* @param pMemObj Where to store the ring-0 memory object handle.
415	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
416	* @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object.
417	*/
418	RTR0DECL(int) RTR0MemObjAllocLow(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable)
419	{
420	/* sanity checks. */
421	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
422	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
423	*pMemObj = NIL_RTR0MEMOBJ;
424	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
425	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
426
427	/* do the allocation. */
428	return rtR0MemObjNativeAllocLow(pMemObj, cbAligned, fExecutable);
429	}
430
431
432	/**
433	* Allocates page aligned virtual kernel memory with contiguous physical backing below 4GB.
434	*
435	* The physical memory backing the allocation is fixed.
436	*
437	* @returns IPRT status code.
438	* @param pMemObj Where to store the ring-0 memory object handle.
439	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
440	* @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object.
441	*/
442	RTR0DECL(int) RTR0MemObjAllocCont(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable)
443	{
444	/* sanity checks. */
445	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
446	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
447	*pMemObj = NIL_RTR0MEMOBJ;
448	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
449	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
450
451	/* do the allocation. */
452	return rtR0MemObjNativeAllocCont(pMemObj, cbAligned, fExecutable);
453	}
454
455
456	/**
457	* Locks a range of user virtual memory.
458	*
459	* @returns IPRT status code.
460	* @param pMemObj Where to store the ring-0 memory object handle.
461	* @param R3Ptr User virtual address. This is rounded down to a page boundrary.
462	* @param cb Number of bytes to lock. This is rounded up to nearest page boundrary.
463	* @param R0Process The process to lock pages in. NIL_R0PROCESS is an alias for the current one.
464	*
465	* @remark RTR0MemGetAddressR3() and RTR0MemGetAddress() will return the rounded down address.
466	*/
467	RTR0DECL(int) RTR0MemObjLockUser(PRTR0MEMOBJ pMemObj, RTR3PTR R3Ptr, size_t cb, RTR0PROCESS R0Process)
468	{
469	/* sanity checks. */
470	const size_t cbAligned = RT_ALIGN_Z(cb + (R3Ptr & PAGE_OFFSET_MASK), PAGE_SIZE);
471	RTR3PTR const R3PtrAligned = (R3Ptr & ~(RTR3PTR)PAGE_OFFSET_MASK);
472	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
473	*pMemObj = NIL_RTR0MEMOBJ;
474	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
475	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
476	if (R0Process == NIL_RTR0PROCESS)
477	R0Process = RTR0ProcHandleSelf();
478
479	/* do the locking. */
480	return rtR0MemObjNativeLockUser(pMemObj, R3PtrAligned, cbAligned, R0Process);
481	}
482
483
484	/**
485	* Locks a range of kernel virtual memory.
486	*
487	* @returns IPRT status code.
488	* @param pMemObj Where to store the ring-0 memory object handle.
489	* @param pv Kernel virtual address. This is rounded down to a page boundrary.
490	* @param cb Number of bytes to lock. This is rounded up to nearest page boundrary.
491	*
492	* @remark RTR0MemGetAddress() will return the rounded down address.
493	*/
494	RTR0DECL(int) RTR0MemObjLockKernel(PRTR0MEMOBJ pMemObj, void *pv, size_t cb)
495	{
496	/* sanity checks. */
497	const size_t cbAligned = RT_ALIGN_Z(cb + ((uintptr_t)pv & PAGE_OFFSET_MASK), PAGE_SIZE);
498	void * const pvAligned = (void *)((uintptr_t)pv & ~(uintptr_t)PAGE_OFFSET_MASK);
499	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
500	*pMemObj = NIL_RTR0MEMOBJ;
501	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
502	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
503	AssertPtrReturn(pvAligned, VERR_INVALID_POINTER);
504
505	/* do the allocation. */
506	return rtR0MemObjNativeLockKernel(pMemObj, pvAligned, cbAligned);
507	}
508
509
510	/**
511	* Allocates contiguous page aligned physical memory without (necessarily) any kernel mapping.
512	*
513	* @returns IPRT status code.
514	* @param pMemObj Where to store the ring-0 memory object handle.
515	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
516	* @param PhysHighest The highest permittable address (inclusive).
517	* Pass NIL_RTHCPHYS if any address is acceptable.
518	*/
519	RTR0DECL(int) RTR0MemObjAllocPhys(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest)
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
529	/* do the allocation. */
530	return rtR0MemObjNativeAllocPhys(pMemObj, cbAligned, PhysHighest);
531	}
532
533
534	/**
535	* Allocates non-contiguous page aligned physical memory without (necessarily) any kernel mapping.
536	*
537	* @returns IPRT status code.
538	* @param pMemObj Where to store the ring-0 memory object handle.
539	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
540	* @param PhysHighest The highest permittable address (inclusive).
541	* Pass NIL_RTHCPHYS if any address is acceptable.
542	*/
543	RTR0DECL(int) RTR0MemObjAllocPhysNC(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest)
544	{
545	/* sanity checks. */
546	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
547	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
548	*pMemObj = NIL_RTR0MEMOBJ;
549	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
550	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
551	AssertReturn(PhysHighest >= cb, VERR_INVALID_PARAMETER);
552
553	/* do the allocation. */
554	return rtR0MemObjNativeAllocPhysNC(pMemObj, cbAligned, PhysHighest);
555	}
556
557
558	/**
559	* Creates a page aligned, contiguous, physical memory object.
560	*
561	* No physical memory is allocated, we trust you do know what you're doing.
562	*
563	* @returns IPRT status code.
564	* @param pMemObj Where to store the ring-0 memory object handle.
565	* @param Phys The physical address to start at. This is rounded down to the
566	* nearest page boundrary.
567	* @param cb The size of the object in bytes. This is rounded up to nearest page boundrary.
568	*/
569	RTR0DECL(int) RTR0MemObjEnterPhys(PRTR0MEMOBJ pMemObj, RTHCPHYS Phys, size_t cb)
570	{
571	/* sanity checks. */
572	const size_t cbAligned = RT_ALIGN_Z(cb + (Phys & PAGE_OFFSET_MASK), PAGE_SIZE);
573	const RTHCPHYS PhysAligned = Phys & ~(RTHCPHYS)PAGE_OFFSET_MASK;
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(Phys != NIL_RTHCPHYS, VERR_INVALID_PARAMETER);
579
580	/* do the allocation. */
581	return rtR0MemObjNativeEnterPhys(pMemObj, PhysAligned, cbAligned);
582	}
583
584
585	/**
586	* Reserves kernel virtual address space.
587	*
588	* @returns IPRT status code.
589	* @param pMemObj Where to store the ring-0 memory object handle.
590	* @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment.
591	* @param cb The number of bytes to reserve. This is rounded up to nearest page.
592	* @param uAlignment The alignment of the reserved memory.
593	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M.
594	*/
595	RTR0DECL(int) RTR0MemObjReserveKernel(PRTR0MEMOBJ pMemObj, void *pvFixed, size_t cb, size_t uAlignment)
596	{
597	/* sanity checks. */
598	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
599	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
600	*pMemObj = NIL_RTR0MEMOBJ;
601	if (uAlignment == 0)
602	uAlignment = PAGE_SIZE;
603	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
604	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
605	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
606	if (pvFixed != (void *)-1)
607	AssertReturn(!((uintptr_t)pvFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
608
609	/* do the reservation. */
610	return rtR0MemObjNativeReserveKernel(pMemObj, pvFixed, cbAligned, uAlignment);
611	}
612
613
614	/**
615	* Reserves user virtual address space in the current process.
616	*
617	* @returns IPRT status code.
618	* @param pMemObj Where to store the ring-0 memory object handle.
619	* @param R3PtrFixed Requested address. (RTR3PTR)-1 means any address. This must match the alignment.
620	* @param cb The number of bytes to reserve. This is rounded up to nearest PAGE_SIZE.
621	* @param uAlignment The alignment of the reserved memory.
622	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M.
623	* @param R0Process The process to reserve the memory in. NIL_R0PROCESS is an alias for the current one.
624	*/
625	RTR0DECL(int) RTR0MemObjReserveUser(PRTR0MEMOBJ pMemObj, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
626	{
627	/* sanity checks. */
628	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
629	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
630	*pMemObj = NIL_RTR0MEMOBJ;
631	if (uAlignment == 0)
632	uAlignment = PAGE_SIZE;
633	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
634	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
635	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
636	if (R3PtrFixed != (RTR3PTR)-1)
637	AssertReturn(!(R3PtrFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
638	if (R0Process == NIL_RTR0PROCESS)
639	R0Process = RTR0ProcHandleSelf();
640
641	/* do the reservation. */
642	return rtR0MemObjNativeReserveUser(pMemObj, R3PtrFixed, cbAligned, uAlignment, R0Process);
643	}
644
645
646	/**
647	* Maps a memory object into kernel virtual address space.
648	*
649	* @returns IPRT status code.
650	* @param pMemObj Where to store the ring-0 memory object handle of the mapping object.
651	* @param MemObjToMap The object to be map.
652	* @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment.
653	* @param uAlignment The alignment of the reserved memory.
654	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M.
655	* @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE).
656	*/
657	RTR0DECL(int) RTR0MemObjMapKernel(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, void *pvFixed, size_t uAlignment, unsigned fProt)
658	{
659	/* sanity checks. */
660	PRTR0MEMOBJINTERNAL pMemToMap;
661	PRTR0MEMOBJINTERNAL pNew;
662	int rc;
663	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
664	*pMemObj = NIL_RTR0MEMOBJ;
665	AssertPtrReturn(MemObjToMap, VERR_INVALID_HANDLE);
666	pMemToMap = (PRTR0MEMOBJINTERNAL)MemObjToMap;
667	AssertReturn(pMemToMap->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
668	AssertReturn(pMemToMap->enmType > RTR0MEMOBJTYPE_INVALID && pMemToMap->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
669	AssertReturn(!rtR0MemObjIsMapping(pMemToMap), VERR_INVALID_PARAMETER);
670	AssertReturn(pMemToMap->enmType != RTR0MEMOBJTYPE_RES_VIRT, VERR_INVALID_PARAMETER);
671	if (uAlignment == 0)
672	uAlignment = PAGE_SIZE;
673	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
674	if (pvFixed != (void *)-1)
675	AssertReturn(!((uintptr_t)pvFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
676	AssertReturn(fProt != RTMEM_PROT_NONE, VERR_INVALID_PARAMETER);
677	AssertReturn(!(fProt & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
678
679
680	/* do the mapping. */
681	rc = rtR0MemObjNativeMapKernel(&pNew, pMemToMap, pvFixed, uAlignment, fProt);
682	if (RT_SUCCESS(rc))
683	{
684	/* link it. */
685	rc = rtR0MemObjLink(pMemToMap, pNew);
686	if (RT_SUCCESS(rc))
687	*pMemObj = pNew;
688	else
689	{
690	/* damn, out of memory. bail out. */
691	int rc2 = rtR0MemObjNativeFree(pNew);
692	AssertRC(rc2);
693	pNew->u32Magic++;
694	pNew->enmType = RTR0MEMOBJTYPE_END;
695	RTMemFree(pNew);
696	}
697	}
698
699	return rc;
700	}
701
702
703	/**
704	* Maps a memory object into user virtual address space in the current process.
705	*
706	* @returns IPRT status code.
707	* @param pMemObj Where to store the ring-0 memory object handle of the mapping object.
708	* @param MemObjToMap The object to be map.
709	* @param R3PtrFixed Requested address. (RTR3PTR)-1 means any address. This must match the alignment.
710	* @param uAlignment The alignment of the reserved memory.
711	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M.
712	* @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE).
713	* @param R0Process The process to map the memory into. NIL_R0PROCESS is an alias for the current one.
714	*/
715	RTR0DECL(int) RTR0MemObjMapUser(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
716	{
717	/* sanity checks. */
718	PRTR0MEMOBJINTERNAL pMemToMap;
719	PRTR0MEMOBJINTERNAL pNew;
720	int rc;
721	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
722	pMemToMap = (PRTR0MEMOBJINTERNAL)MemObjToMap;
723	*pMemObj = NIL_RTR0MEMOBJ;
724	AssertPtrReturn(MemObjToMap, VERR_INVALID_HANDLE);
725	AssertReturn(pMemToMap->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
726	AssertReturn(pMemToMap->enmType > RTR0MEMOBJTYPE_INVALID && pMemToMap->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
727	AssertReturn(!rtR0MemObjIsMapping(pMemToMap), VERR_INVALID_PARAMETER);
728	AssertReturn(pMemToMap->enmType != RTR0MEMOBJTYPE_RES_VIRT, VERR_INVALID_PARAMETER);
729	if (uAlignment == 0)
730	uAlignment = PAGE_SIZE;
731	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
732	if (R3PtrFixed != (RTR3PTR)-1)
733	AssertReturn(!(R3PtrFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
734	AssertReturn(fProt != RTMEM_PROT_NONE, VERR_INVALID_PARAMETER);
735	AssertReturn(!(fProt & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
736	if (R0Process == NIL_RTR0PROCESS)
737	R0Process = RTR0ProcHandleSelf();
738
739	/* do the mapping. */
740	rc = rtR0MemObjNativeMapUser(&pNew, pMemToMap, R3PtrFixed, uAlignment, fProt, R0Process);
741	if (RT_SUCCESS(rc))
742	{
743	/* link it. */
744	rc = rtR0MemObjLink(pMemToMap, pNew);
745	if (RT_SUCCESS(rc))
746	*pMemObj = pNew;
747	else
748	{
749	/* damn, out of memory. bail out. */
750	int rc2 = rtR0MemObjNativeFree(pNew);
751	AssertRC(rc2);
752	pNew->u32Magic++;
753	pNew->enmType = RTR0MEMOBJTYPE_END;
754	RTMemFree(pNew);
755	}
756	}
757
758	return rc;
759	}
760

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source: vbox/trunk/src/VBox/Runtime/r0drv/memobj-r0drv.cpp@ 5617

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