memobj-r0drv-freebsd.c@ 24181

Last change on this file since 24181 was 23610, checked in by vboxsync, 15 years ago
IPRT,VMM,SUPDrv,VBGLR0: Added a parameter to RTR0MemObjLockUser/Kernel that indicates read/write intent so we can correctly lock readonly memory on Windows and OS/2. (Guest property strings, see #4238.)
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 27.8 KB

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1	/* $Id: memobj-r0drv-freebsd.c 23610 2009-10-07 21:22:10Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, FreeBSD.
4	*/
5
6	/*
7	* Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
8	*
9	* Permission is hereby granted, free of charge, to any person
10	* obtaining a copy of this software and associated documentation
11	* files (the "Software"), to deal in the Software without
12	* restriction, including without limitation the rights to use,
13	* copy, modify, merge, publish, distribute, sublicense, and/or sell
14	* copies of the Software, and to permit persons to whom the
15	* Software is furnished to do so, subject to the following
16	* conditions:
17	*
18	* The above copyright notice and this permission notice shall be
19	* included in all copies or substantial portions of the Software.
20	*
21	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
23	* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
25	* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
26	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
28	* OTHER DEALINGS IN THE SOFTWARE.
29	*/
30
31
32	/*******************************************************************************
33	* Header Files *
34	*******************************************************************************/
35	#include "the-freebsd-kernel.h"
36
37	#include <iprt/memobj.h>
38	#include <iprt/mem.h>
39	#include <iprt/err.h>
40	#include <iprt/assert.h>
41	#include <iprt/log.h>
42	#include <iprt/param.h>
43	#include <iprt/process.h>
44	#include "internal/memobj.h"
45
46
47	/*******************************************************************************
48	* Structures and Typedefs *
49	*******************************************************************************/
50	/**
51	* The FreeBSD version of the memory object structure.
52	*/
53	typedef struct RTR0MEMOBJFREEBSD
54	{
55	/** The core structure. */
56	RTR0MEMOBJINTERNAL Core;
57	/** The VM object associated with the allocation. */
58	vm_object_t pObject;
59	/** the VM object associated with the mapping.
60	* In mapping mem object, this is the shadow object?
61	* In a allocation/enter mem object, this is the shared object we constructed (contig, perhaps alloc). */
62	vm_object_t pMappingObject;
63	} RTR0MEMOBJFREEBSD, *PRTR0MEMOBJFREEBSD;
64
65
66	MALLOC_DEFINE(M_IPRTMOBJ, "iprtmobj", "IPRT - R0MemObj");
67
68	/*******************************************************************************
69	* Internal Functions *
70	*******************************************************************************/
71
72
73	int rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
74	{
75	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)pMem;
76	int rc;
77
78	switch (pMemFreeBSD->Core.enmType)
79	{
80	case RTR0MEMOBJTYPE_CONT:
81	contigfree(pMemFreeBSD->Core.pv, pMemFreeBSD->Core.cb, M_IPRTMOBJ);
82	if (pMemFreeBSD->pMappingObject)
83	{
84	rc = vm_map_remove(kernel_map,
85	(vm_offset_t)pMemFreeBSD->Core.pv,
86	(vm_offset_t)pMemFreeBSD->Core.pv + pMemFreeBSD->Core.cb);
87	AssertMsg(rc == KERN_SUCCESS, ("%#x", rc));
88	}
89	break;
90
91	case RTR0MEMOBJTYPE_PAGE:
92	if (pMemFreeBSD->pObject)
93	{
94	rc = vm_map_remove(kernel_map,
95	(vm_offset_t)pMemFreeBSD->Core.pv,
96	(vm_offset_t)pMemFreeBSD->Core.pv + pMemFreeBSD->Core.cb);
97	AssertMsg(rc == KERN_SUCCESS, ("%#x", rc));
98	}
99	else
100	{
101	contigfree(pMemFreeBSD->Core.pv, pMemFreeBSD->Core.cb, M_IPRTMOBJ);
102	if (pMemFreeBSD->pMappingObject)
103	{
104	rc = vm_map_remove(kernel_map,
105	(vm_offset_t)pMemFreeBSD->Core.pv,
106	(vm_offset_t)pMemFreeBSD->Core.pv + pMemFreeBSD->Core.cb);
107	AssertMsg(rc == KERN_SUCCESS, ("%#x", rc));
108	}
109	}
110	break;
111
112	case RTR0MEMOBJTYPE_LOCK:
113	{
114	int fFlags = VM_MAP_WIRE_NOHOLES;
115	vm_map_t pMap = kernel_map;
116
117	if (pMemFreeBSD->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
118	{
119	pMap = &((struct proc *)pMemFreeBSD->Core.u.Lock.R0Process)->p_vmspace->vm_map;
120	fFlags \|= VM_MAP_WIRE_USER;
121	}
122	else
123	fFlags \|= VM_MAP_WIRE_SYSTEM;
124
125	rc = vm_map_unwire(pMap,
126	(vm_offset_t)pMemFreeBSD->Core.pv,
127	(vm_offset_t)pMemFreeBSD->Core.pv + pMemFreeBSD->Core.cb,
128	fFlags);
129	AssertMsg(rc == KERN_SUCCESS, ("%#x", rc));
130	break;
131	}
132
133	case RTR0MEMOBJTYPE_RES_VIRT:
134	{
135	vm_map_t pMap = kernel_map;
136	if (pMemFreeBSD->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
137	pMap = &((struct proc *)pMemFreeBSD->Core.u.Lock.R0Process)->p_vmspace->vm_map;
138	rc = vm_map_remove(pMap,
139	(vm_offset_t)pMemFreeBSD->Core.pv,
140	(vm_offset_t)pMemFreeBSD->Core.pv + pMemFreeBSD->Core.cb);
141	AssertMsg(rc == KERN_SUCCESS, ("%#x", rc));
142	break;
143	}
144
145	case RTR0MEMOBJTYPE_MAPPING:
146	{
147	vm_map_t pMap = kernel_map;
148
149	/* vm_map_remove will unmap the pages we inserted with pmap_enter */
150	AssertMsg(pMemFreeBSD->pMappingObject != NULL, ("MappingObject is NULL\n"));
151	if (pMemFreeBSD->Core.u.Mapping.R0Process != NIL_RTR0PROCESS)
152	pMap = &((struct proc *)pMemFreeBSD->Core.u.Mapping.R0Process)->p_vmspace->vm_map;
153
154	rc = vm_map_remove(pMap,
155	(vm_offset_t)pMemFreeBSD->Core.pv,
156	(vm_offset_t)pMemFreeBSD->Core.pv + pMemFreeBSD->Core.cb);
157	AssertMsg(rc == KERN_SUCCESS, ("%#x", rc));
158	break;
159	}
160
161	/* unused: */
162	case RTR0MEMOBJTYPE_LOW:
163	case RTR0MEMOBJTYPE_PHYS:
164	case RTR0MEMOBJTYPE_PHYS_NC:
165	default:
166	AssertMsgFailed(("enmType=%d\n", pMemFreeBSD->Core.enmType));
167	return VERR_INTERNAL_ERROR;
168	}
169
170	return VINF_SUCCESS;
171	}
172
173
174	int rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
175	{
176	int rc;
177	size_t cPages = cb >> PAGE_SHIFT;
178
179	/* create the object. */
180	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(*pMemFreeBSD), RTR0MEMOBJTYPE_PAGE, NULL, cb);
181	if (!pMemFreeBSD)
182	return VERR_NO_MEMORY;
183
184	pMemFreeBSD->pObject = vm_object_allocate(OBJT_DEFAULT, cPages);
185	if (pMemFreeBSD->pObject)
186	{
187	vm_offset_t MapAddress = vm_map_min(kernel_map);
188	rc = vm_map_find(kernel_map, /* map */
189	pMemFreeBSD->pObject, /* object */
190	0, /* offset */
191	&MapAddress, /* addr (IN/OUT) */
192	cb, /* length */
193	TRUE, /* find_space */
194	fExecutable /* protection */
195	? VM_PROT_ALL
196	: VM_PROT_RW,
197	VM_PROT_ALL, /* max(_prot) */
198	FALSE); /* cow (copy-on-write) */
199	if (rc == KERN_SUCCESS)
200	{
201	vm_offset_t AddressDst = MapAddress;
202
203	rc = VINF_SUCCESS;
204
205	VM_OBJECT_LOCK(pMemFreeBSD->pObject);
206	for (size_t iPage = 0; iPage < cPages; iPage++)
207	{
208	vm_pindex_t PageIndex = OFF_TO_IDX(AddressDst);
209	vm_page_t pPage;
210
211	pPage = vm_page_alloc(pMemFreeBSD->pObject, PageIndex,
212	VM_ALLOC_NOBUSY \| VM_ALLOC_SYSTEM \|
213	VM_ALLOC_WIRED);
214
215	#if __FreeBSD_version >= 800000 /** @todo Find exact version number */
216	/* Fixes crashes during VM termination on FreeBSD8-CURRENT amd64
217	* with kernel debugging enabled. */
218	vm_page_set_valid(pPage, 0, PAGE_SIZE);
219	#endif
220
221	if (pPage)
222	{
223	vm_page_lock_queues();
224	vm_page_wire(pPage);
225	vm_page_unlock_queues();
226	/* Put the page into the page table now. */
227	#if __FreeBSD_version >= 701105
228	pmap_enter(kernel_map->pmap, AddressDst, VM_PROT_NONE, pPage,
229	fExecutable
230	? VM_PROT_ALL
231	: VM_PROT_RW,
232	TRUE);
233	#else
234	pmap_enter(kernel_map->pmap, AddressDst, pPage,
235	fExecutable
236	? VM_PROT_ALL
237	: VM_PROT_RW,
238	TRUE);
239	#endif
240	}
241	else
242	{
243	/*
244	* Allocation failed. vm_map_remove will remove any
245	* page already alocated.
246	*/
247	rc = VERR_NO_MEMORY;
248	break;
249	}
250	AddressDst += PAGE_SIZE;
251	}
252	VM_OBJECT_UNLOCK(pMemFreeBSD->pObject);
253
254	if (rc == VINF_SUCCESS)
255	{
256	pMemFreeBSD->Core.pv = (void *)MapAddress;
257	*ppMem = &pMemFreeBSD->Core;
258	return VINF_SUCCESS;
259	}
260
261	vm_map_remove(kernel_map,
262	MapAddress,
263	MapAddress + cb);
264	}
265	rc = VERR_NO_MEMORY; /** @todo fix translation (borrow from darwin) */
266	}
267	else
268	rc = VERR_NO_MEMORY;
269
270	rtR0MemObjDelete(&pMemFreeBSD->Core);
271	return rc;
272	}
273
274
275	int rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
276	{
277	/*
278	* Try a Alloc first and see if we get luck, if not try contigmalloc.
279	* Might wish to try find our own pages or something later if this
280	* turns into a problemspot on AMD64 boxes.
281	*/
282	int rc = rtR0MemObjNativeAllocPage(ppMem, cb, fExecutable);
283	if (RT_SUCCESS(rc))
284	{
285	size_t iPage = cb >> PAGE_SHIFT;
286	while (iPage-- > 0)
287	if (rtR0MemObjNativeGetPagePhysAddr(*ppMem, iPage) > (_4G - PAGE_SIZE))
288	{
289	RTR0MemObjFree(*ppMem, false);
290	*ppMem = NULL;
291	rc = VERR_NO_MEMORY;
292	break;
293	}
294	}
295	if (RT_FAILURE(rc))
296	rc = rtR0MemObjNativeAllocCont(ppMem, cb, fExecutable);
297	return rc;
298	}
299
300
301	int rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
302	{
303	/* create the object. */
304	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(*pMemFreeBSD), RTR0MEMOBJTYPE_CONT, NULL, cb);
305	if (!pMemFreeBSD)
306	return VERR_NO_MEMORY;
307
308	/* do the allocation. */
309	pMemFreeBSD->Core.pv = contigmalloc(cb, /* size */
310	M_IPRTMOBJ, /* type */
311	M_NOWAIT \| M_ZERO, /* flags */
312	0, /* lowest physical address*/
313	_4G-1, /* highest physical address */
314	PAGE_SIZE, /* alignment. */
315	0); /* boundrary */
316	if (pMemFreeBSD->Core.pv)
317	{
318	pMemFreeBSD->Core.u.Cont.Phys = vtophys(pMemFreeBSD->Core.pv);
319	*ppMem = &pMemFreeBSD->Core;
320	return VINF_SUCCESS;
321	}
322
323	NOREF(fExecutable);
324	rtR0MemObjDelete(&pMemFreeBSD->Core);
325	return VERR_NO_MEMORY;
326	}
327
328
329	int rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
330	{
331	/** @todo check if there is a more appropriate API somewhere.. */
332
333	/* create the object. */
334	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(*pMemFreeBSD), RTR0MEMOBJTYPE_CONT, NULL, cb);
335	if (!pMemFreeBSD)
336	return VERR_NO_MEMORY;
337
338	/* do the allocation. */
339	pMemFreeBSD->Core.pv = contigmalloc(cb, /* size */
340	M_IPRTMOBJ, /* type */
341	M_NOWAIT \| M_ZERO, /* flags */
342	0, /* lowest physical address*/
343	PhysHighest, /* highest physical address */
344	PAGE_SIZE, /* alignment. */
345	0); /* boundrary */
346	if (pMemFreeBSD->Core.pv)
347	{
348	pMemFreeBSD->Core.u.Cont.Phys = vtophys(pMemFreeBSD->Core.pv);
349	*ppMem = &pMemFreeBSD->Core;
350	return VINF_SUCCESS;
351	}
352
353	rtR0MemObjDelete(&pMemFreeBSD->Core);
354	return VERR_NO_MEMORY;
355	}
356
357
358	int rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
359	{
360	/** @todo rtR0MemObjNativeAllocPhys / freebsd */
361	return VERR_NOT_SUPPORTED;
362	}
363
364
365	int rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb)
366	{
367	/* create the object. */
368	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(*pMemFreeBSD), RTR0MEMOBJTYPE_PHYS, NULL, cb);
369	if (!pMemFreeBSD)
370	return VERR_NO_MEMORY;
371
372	/* there is no allocation here, it needs to be mapped somewhere first. */
373	pMemFreeBSD->Core.u.Phys.fAllocated = false;
374	pMemFreeBSD->Core.u.Phys.PhysBase = Phys;
375	*ppMem = &pMemFreeBSD->Core;
376	return VINF_SUCCESS;
377	}
378
379
380	int rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
381	{
382	int rc;
383	NOREF(fAccess);
384
385	/* create the object. */
386	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(pMemFreeBSD), RTR0MEMOBJTYPE_LOCK, (void )R3Ptr, cb);
387	if (!pMemFreeBSD)
388	return VERR_NO_MEMORY;
389
390	/*
391	* We could've used vslock here, but we don't wish to be subject to
392	* resource usage restrictions, so we'll call vm_map_wire directly.
393	*/
394	rc = vm_map_wire(&((struct proc )R0Process)->p_vmspace->vm_map, / the map */
395	(vm_offset_t)R3Ptr, /* start */
396	(vm_offset_t)R3Ptr + cb, /* end */
397	VM_MAP_WIRE_USER \| VM_MAP_WIRE_NOHOLES); /* flags */
398	if (rc == KERN_SUCCESS)
399	{
400	pMemFreeBSD->Core.u.Lock.R0Process = R0Process;
401	*ppMem = &pMemFreeBSD->Core;
402	return VINF_SUCCESS;
403	}
404	rtR0MemObjDelete(&pMemFreeBSD->Core);
405	return VERR_NO_MEMORY;/** @todo fix mach -> vbox error conversion for freebsd. */
406	}
407
408
409	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
410	{
411	int rc;
412	NOREF(fAccess);
413
414	/* create the object. */
415	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(*pMemFreeBSD), RTR0MEMOBJTYPE_LOCK, pv, cb);
416	if (!pMemFreeBSD)
417	return VERR_NO_MEMORY;
418
419	/* lock the memory */
420	rc = vm_map_wire(kernel_map, /* the map */
421	(vm_offset_t)pv, /* start */
422	(vm_offset_t)pv + cb, /* end */
423	VM_MAP_WIRE_SYSTEM \| VM_MAP_WIRE_NOHOLES); /* flags - SYSTEM? */
424	if (rc == KERN_SUCCESS)
425	{
426	pMemFreeBSD->Core.u.Lock.R0Process = NIL_RTR0PROCESS;
427	*ppMem = &pMemFreeBSD->Core;
428	return VINF_SUCCESS;
429	}
430	rtR0MemObjDelete(&pMemFreeBSD->Core);
431	return VERR_NO_MEMORY;/** @todo fix mach -> vbox error conversion for freebsd. */
432	}
433
434
435	/**
436	* Worker for the two virtual address space reservers.
437	*
438	* We're leaning on the examples provided by mmap and vm_mmap in vm_mmap.c here.
439	*/
440	static int rtR0MemObjNativeReserveInMap(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process, vm_map_t pMap)
441	{
442	int rc;
443
444	/*
445	* The pvFixed address range must be within the VM space when specified.
446	*/
447	if (pvFixed != (void *)-1
448	&& ( (vm_offset_t)pvFixed < vm_map_min(pMap)
449	\|\| (vm_offset_t)pvFixed + cb > vm_map_max(pMap)))
450	return VERR_INVALID_PARAMETER;
451
452	/*
453	* Check that the specified alignment is supported.
454	*/
455	if (uAlignment > PAGE_SIZE)
456	return VERR_NOT_SUPPORTED;
457
458	/*
459	* Create the object.
460	*/
461	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(*pMemFreeBSD), RTR0MEMOBJTYPE_RES_VIRT, NULL, cb);
462	if (!pMemFreeBSD)
463	return VERR_NO_MEMORY;
464
465	/*
466	* Allocate an empty VM object and map it into the requested map.
467	*/
468	pMemFreeBSD->pObject = vm_object_allocate(OBJT_DEFAULT, cb >> PAGE_SHIFT);
469	if (pMemFreeBSD->pObject)
470	{
471	vm_offset_t MapAddress = pvFixed != (void *)-1
472	? (vm_offset_t)pvFixed
473	: vm_map_min(pMap);
474	if (pvFixed != (void *)-1)
475	vm_map_remove(pMap,
476	MapAddress,
477	MapAddress + cb);
478
479	rc = vm_map_find(pMap, /* map */
480	pMemFreeBSD->pObject, /* object */
481	0, /* offset */
482	&MapAddress, /* addr (IN/OUT) */
483	cb, /* length */
484	pvFixed == (void )-1, / find_space */
485	VM_PROT_NONE, /* protection */
486	VM_PROT_ALL, /* max(_prot) ?? */
487	0); /* cow (copy-on-write) */
488	if (rc == KERN_SUCCESS)
489	{
490	if (R0Process != NIL_RTR0PROCESS)
491	{
492	rc = vm_map_inherit(pMap,
493	MapAddress,
494	MapAddress + cb,
495	VM_INHERIT_SHARE);
496	AssertMsg(rc == KERN_SUCCESS, ("%#x\n", rc));
497	}
498	pMemFreeBSD->Core.pv = (void *)MapAddress;
499	pMemFreeBSD->Core.u.ResVirt.R0Process = R0Process;
500	*ppMem = &pMemFreeBSD->Core;
501	return VINF_SUCCESS;
502	}
503	vm_object_deallocate(pMemFreeBSD->pObject);
504	rc = VERR_NO_MEMORY; /** @todo fix translation (borrow from darwin) */
505	}
506	else
507	rc = VERR_NO_MEMORY;
508	rtR0MemObjDelete(&pMemFreeBSD->Core);
509	return rc;
510
511	}
512
513	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
514	{
515	return rtR0MemObjNativeReserveInMap(ppMem, pvFixed, cb, uAlignment, NIL_RTR0PROCESS, kernel_map);
516	}
517
518
519	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
520	{
521	return rtR0MemObjNativeReserveInMap(ppMem, (void *)R3PtrFixed, cb, uAlignment, R0Process,
522	&((struct proc *)R0Process)->p_vmspace->vm_map);
523	}
524
525
526	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
527	unsigned fProt, size_t offSub, size_t cbSub)
528	{
529	AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
530	AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
531
532	/*
533	* Check that the specified alignment is supported.
534	*/
535	if (uAlignment > PAGE_SIZE)
536	return VERR_NOT_SUPPORTED;
537
538
539
540	/* Phys: see pmap_mapdev in i386/i386/pmap.c (http://fxr.watson.org/fxr/source/i386/i386/pmap.c?v=RELENG62#L2860) */
541
542	#if 0
543	/** @todo finish the implementation. */
544
545	int rc;
546	void *pvR0 = NULL;
547	PRTR0MEMOBJFREEBSD pMemToMapOs2 = (PRTR0MEMOBJFREEBSD)pMemToMap;
548	switch (pMemToMapOs2->Core.enmType)
549	{
550	/*
551	* These has kernel mappings.
552	*/
553	case RTR0MEMOBJTYPE_PAGE:
554	case RTR0MEMOBJTYPE_LOW:
555	case RTR0MEMOBJTYPE_CONT:
556	pvR0 = pMemToMapOs2->Core.pv;
557	break;
558
559	case RTR0MEMOBJTYPE_PHYS_NC:
560	case RTR0MEMOBJTYPE_PHYS:
561	pvR0 = pMemToMapOs2->Core.pv;
562	if (!pvR0)
563	{
564	/* no ring-0 mapping, so allocate a mapping in the process. */
565	AssertMsgReturn(uAlignment == PAGE_SIZE, ("%#zx\n", uAlignment), VERR_NOT_SUPPORTED);
566	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
567	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
568	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
569	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS, &pvR0, (PPVOID)&ulPhys, NULL);
570	if (rc)
571	return RTErrConvertFromOS2(rc);
572	pMemToMapOs2->Core.pv = pvR0;
573	}
574	break;
575
576	case RTR0MEMOBJTYPE_LOCK:
577	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
578	return VERR_NOT_SUPPORTED; /** @todo implement this... */
579	pvR0 = pMemToMapOs2->Core.pv;
580	break;
581
582	case RTR0MEMOBJTYPE_RES_VIRT:
583	case RTR0MEMOBJTYPE_MAPPING:
584	default:
585	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
586	return VERR_INTERNAL_ERROR;
587	}
588
589	/*
590	* Create a dummy mapping object for it.
591	*
592	* All mappings are read/write/execute in OS/2 and there isn't
593	* any cache options, so sharing is ok. And the main memory object
594	* isn't actually freed until all the mappings have been freed up
595	* (reference counting).
596	*/
597	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING, pvR0, pMemToMapOs2->Core.cb);
598	if (pMemFreeBSD)
599	{
600	pMemFreeBSD->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
601	*ppMem = &pMemFreeBSD->Core;
602	return VINF_SUCCESS;
603	}
604	return VERR_NO_MEMORY;
605	#endif
606	return VERR_NOT_IMPLEMENTED;
607	}
608
609
610	/* see http://markmail.org/message/udhq33tefgtyfozs */
611	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
612	{
613	/*
614	* Check for unsupported stuff.
615	*/
616	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
617	AssertMsgReturn(R3PtrFixed == (RTR3PTR)-1, ("%p\n", R3PtrFixed), VERR_NOT_SUPPORTED);
618	if (uAlignment > PAGE_SIZE)
619	return VERR_NOT_SUPPORTED;
620
621	int rc;
622	vm_object_t pObjectToMap = ((PRTR0MEMOBJFREEBSD)pMemToMap)->pObject;
623	struct proc pProc = (struct proc )R0Process;
624	struct vm_map *pProcMap = &pProc->p_vmspace->vm_map;
625
626	/* calc protection */
627	vm_prot_t ProtectionFlags = 0;
628	if ((fProt & RTMEM_PROT_NONE) == RTMEM_PROT_NONE)
629	ProtectionFlags = VM_PROT_NONE;
630	if ((fProt & RTMEM_PROT_READ) == RTMEM_PROT_READ)
631	ProtectionFlags \|= VM_PROT_READ;
632	if ((fProt & RTMEM_PROT_WRITE) == RTMEM_PROT_WRITE)
633	ProtectionFlags \|= VM_PROT_WRITE;
634	if ((fProt & RTMEM_PROT_EXEC) == RTMEM_PROT_EXEC)
635	ProtectionFlags \|= VM_PROT_EXECUTE;
636
637	/* calc mapping address */
638	PROC_LOCK(pProc);
639	vm_offset_t AddrR3 = round_page((vm_offset_t)pProc->p_vmspace->vm_daddr + lim_max(pProc, RLIMIT_DATA));
640	PROC_UNLOCK(pProc);
641
642	vm_object_t pObjectNew = vm_object_allocate(OBJT_PHYS, pMemToMap->cb >> PAGE_SHIFT);
643	if (!RT_UNLIKELY(pObjectNew))
644	return VERR_NO_MEMORY;
645
646	/* Insert the object in the map. */
647	rc = vm_map_find(pProcMap, /* Map to insert the object in */
648	pObjectNew , /* Object to map */
649	0, /* Start offset in the object */
650	&AddrR3, /* Start address IN/OUT */
651	pMemToMap->cb, /* Size of the mapping */
652	TRUE, /* Whether a suitable address should be searched for first */
653	ProtectionFlags, /* protection flags */
654	VM_PROT_ALL, /* Maximum protection flags */
655	0); /* Copy on write */
656
657	/* Map the memory page by page into the destination map. */
658	if (rc == KERN_SUCCESS)
659	{
660	size_t cLeft = pMemToMap->cb >> PAGE_SHIFT;
661	vm_offset_t AddrToMap = (vm_offset_t)pMemToMap->pv;
662	pmap_t pPhysicalMap = pProcMap->pmap;
663	vm_offset_t AddrR3Dst = AddrR3;
664
665	/* Insert the memory page by page into the mapping. */
666	while (cLeft-- > 0)
667	{
668	vm_page_t Page = PHYS_TO_VM_PAGE(vtophys(AddrToMap));
669
670	#if __FreeBSD_version >= 701105
671	pmap_enter(pPhysicalMap, AddrR3Dst, VM_PROT_NONE, Page, ProtectionFlags, TRUE);
672	#else
673	pmap_enter(pPhysicalMap, AddrR3Dst, Page, ProtectionFlags, TRUE);
674	#endif
675	AddrToMap += PAGE_SIZE;
676	AddrR3Dst += PAGE_SIZE;
677	}
678	pObjectToMap = pObjectNew;
679	}
680	else
681	vm_object_deallocate(pObjectNew);
682
683	if (rc == KERN_SUCCESS)
684	{
685	/*
686	* Create a mapping object for it.
687	*/
688	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(RTR0MEMOBJFREEBSD),
689	RTR0MEMOBJTYPE_MAPPING,
690	(void *)AddrR3,
691	pMemToMap->cb);
692	if (pMemFreeBSD)
693	{
694	Assert((vm_offset_t)pMemFreeBSD->Core.pv == AddrR3);
695	pMemFreeBSD->Core.u.Mapping.R0Process = R0Process;
696	pMemFreeBSD->pMappingObject = pObjectToMap;
697	*ppMem = &pMemFreeBSD->Core;
698	return VINF_SUCCESS;
699	}
700
701	rc = vm_map_remove(pProcMap, ((vm_offset_t)AddrR3), ((vm_offset_t)AddrR3) + pMemToMap->cb);
702	AssertMsg(rc == KERN_SUCCESS, ("Deleting mapping failed\n"));
703	}
704
705	if (pObjectToMap)
706	vm_object_deallocate(pObjectToMap);
707
708	return VERR_NO_MEMORY;
709	}
710
711
712	int rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
713	{
714	NOREF(pMem);
715	NOREF(offSub);
716	NOREF(cbSub);
717	NOREF(fProt);
718	return VERR_NOT_SUPPORTED;
719	}
720
721
722	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
723	{
724	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)pMem;
725
726	switch (pMemFreeBSD->Core.enmType)
727	{
728	case RTR0MEMOBJTYPE_LOCK:
729	if ( pMemFreeBSD->Core.u.Lock.R0Process != NIL_RTR0PROCESS
730	&& pMemFreeBSD->Core.u.Lock.R0Process != (RTR0PROCESS)curproc)
731	{
732	/* later */
733	return NIL_RTHCPHYS;
734	}
735	/* fall thru*/
736	case RTR0MEMOBJTYPE_PAGE:
737	case RTR0MEMOBJTYPE_MAPPING:
738	{
739	uint8_t pb = (uint8_t )pMemFreeBSD->Core.pv + (iPage << PAGE_SHIFT);
740	return vtophys(pb);
741	}
742
743	case RTR0MEMOBJTYPE_CONT:
744	return pMemFreeBSD->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
745
746	case RTR0MEMOBJTYPE_PHYS:
747	return pMemFreeBSD->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
748
749	case RTR0MEMOBJTYPE_PHYS_NC:
750	case RTR0MEMOBJTYPE_RES_VIRT:
751	case RTR0MEMOBJTYPE_LOW:
752	default:
753	return NIL_RTHCPHYS;
754	}
755	}
756

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source: vbox/trunk/src/VBox/Runtime/r0drv/freebsd/memobj-r0drv-freebsd.c@ 24181

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