memobj-r0drv-freebsd.c@ 23454

Last change on this file since 23454 was 22574, checked in by vboxsync, 15 years ago
Runtime/memobj-r0drv-freebsd: rtR0MemObjNativeReserveInMap may remove arbitrary mappings if pvFixed is -1. Spotted by Alexander Kabaev
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 27.8 KB

Line
1	/* $Id: memobj-r0drv-freebsd.c 22574 2009-08-30 19:57:03Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, FreeBSD.
4	*/
5
6	/*
7	* Copyright (c) 2007 knut st. osmundsen <[email protected]>
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, RTR0PROCESS R0Process)
381	{
382	int rc;
383
384	/* create the object. */
385	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(pMemFreeBSD), RTR0MEMOBJTYPE_LOCK, (void )R3Ptr, cb);
386	if (!pMemFreeBSD)
387	return VERR_NO_MEMORY;
388
389	/*
390	* We could've used vslock here, but we don't wish to be subject to
391	* resource usage restrictions, so we'll call vm_map_wire directly.
392	*/
393	rc = vm_map_wire(&((struct proc )R0Process)->p_vmspace->vm_map, / the map */
394	(vm_offset_t)R3Ptr, /* start */
395	(vm_offset_t)R3Ptr + cb, /* end */
396	VM_MAP_WIRE_USER \| VM_MAP_WIRE_NOHOLES); /* flags */
397	if (rc == KERN_SUCCESS)
398	{
399	pMemFreeBSD->Core.u.Lock.R0Process = R0Process;
400	*ppMem = &pMemFreeBSD->Core;
401	return VINF_SUCCESS;
402	}
403	rtR0MemObjDelete(&pMemFreeBSD->Core);
404	return VERR_NO_MEMORY;/** @todo fix mach -> vbox error conversion for freebsd. */
405	}
406
407
408	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb)
409	{
410	int rc;
411
412	/* create the object. */
413	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(*pMemFreeBSD), RTR0MEMOBJTYPE_LOCK, pv, cb);
414	if (!pMemFreeBSD)
415	return VERR_NO_MEMORY;
416
417	/* lock the memory */
418	rc = vm_map_wire(kernel_map, /* the map */
419	(vm_offset_t)pv, /* start */
420	(vm_offset_t)pv + cb, /* end */
421	VM_MAP_WIRE_SYSTEM \| VM_MAP_WIRE_NOHOLES); /* flags - SYSTEM? */
422	if (rc == KERN_SUCCESS)
423	{
424	pMemFreeBSD->Core.u.Lock.R0Process = NIL_RTR0PROCESS;
425	*ppMem = &pMemFreeBSD->Core;
426	return VINF_SUCCESS;
427	}
428	rtR0MemObjDelete(&pMemFreeBSD->Core);
429	return VERR_NO_MEMORY;/** @todo fix mach -> vbox error conversion for freebsd. */
430	}
431
432
433	/**
434	* Worker for the two virtual address space reservers.
435	*
436	* We're leaning on the examples provided by mmap and vm_mmap in vm_mmap.c here.
437	*/
438	static int rtR0MemObjNativeReserveInMap(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process, vm_map_t pMap)
439	{
440	int rc;
441
442	/*
443	* The pvFixed address range must be within the VM space when specified.
444	*/
445	if (pvFixed != (void *)-1
446	&& ( (vm_offset_t)pvFixed < vm_map_min(pMap)
447	\|\| (vm_offset_t)pvFixed + cb > vm_map_max(pMap)))
448	return VERR_INVALID_PARAMETER;
449
450	/*
451	* Check that the specified alignment is supported.
452	*/
453	if (uAlignment > PAGE_SIZE)
454	return VERR_NOT_SUPPORTED;
455
456	/*
457	* Create the object.
458	*/
459	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(*pMemFreeBSD), RTR0MEMOBJTYPE_RES_VIRT, NULL, cb);
460	if (!pMemFreeBSD)
461	return VERR_NO_MEMORY;
462
463	/*
464	* Allocate an empty VM object and map it into the requested map.
465	*/
466	pMemFreeBSD->pObject = vm_object_allocate(OBJT_DEFAULT, cb >> PAGE_SHIFT);
467	if (pMemFreeBSD->pObject)
468	{
469	vm_offset_t MapAddress = pvFixed != (void *)-1
470	? (vm_offset_t)pvFixed
471	: vm_map_min(pMap);
472	if (pvFixed != (void *)-1)
473	vm_map_remove(pMap,
474	MapAddress,
475	MapAddress + cb);
476
477	rc = vm_map_find(pMap, /* map */
478	pMemFreeBSD->pObject, /* object */
479	0, /* offset */
480	&MapAddress, /* addr (IN/OUT) */
481	cb, /* length */
482	pvFixed == (void )-1, / find_space */
483	VM_PROT_NONE, /* protection */
484	VM_PROT_ALL, /* max(_prot) ?? */
485	0); /* cow (copy-on-write) */
486	if (rc == KERN_SUCCESS)
487	{
488	if (R0Process != NIL_RTR0PROCESS)
489	{
490	rc = vm_map_inherit(pMap,
491	MapAddress,
492	MapAddress + cb,
493	VM_INHERIT_SHARE);
494	AssertMsg(rc == KERN_SUCCESS, ("%#x\n", rc));
495	}
496	pMemFreeBSD->Core.pv = (void *)MapAddress;
497	pMemFreeBSD->Core.u.ResVirt.R0Process = R0Process;
498	*ppMem = &pMemFreeBSD->Core;
499	return VINF_SUCCESS;
500	}
501	vm_object_deallocate(pMemFreeBSD->pObject);
502	rc = VERR_NO_MEMORY; /** @todo fix translation (borrow from darwin) */
503	}
504	else
505	rc = VERR_NO_MEMORY;
506	rtR0MemObjDelete(&pMemFreeBSD->Core);
507	return rc;
508
509	}
510
511	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
512	{
513	return rtR0MemObjNativeReserveInMap(ppMem, pvFixed, cb, uAlignment, NIL_RTR0PROCESS, kernel_map);
514	}
515
516
517	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
518	{
519	return rtR0MemObjNativeReserveInMap(ppMem, (void *)R3PtrFixed, cb, uAlignment, R0Process,
520	&((struct proc *)R0Process)->p_vmspace->vm_map);
521	}
522
523
524	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
525	unsigned fProt, size_t offSub, size_t cbSub)
526	{
527	AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
528	AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
529
530	/*
531	* Check that the specified alignment is supported.
532	*/
533	if (uAlignment > PAGE_SIZE)
534	return VERR_NOT_SUPPORTED;
535
536
537
538	/* Phys: see pmap_mapdev in i386/i386/pmap.c (http://fxr.watson.org/fxr/source/i386/i386/pmap.c?v=RELENG62#L2860) */
539
540	#if 0
541	/** @todo finish the implementation. */
542
543	int rc;
544	void *pvR0 = NULL;
545	PRTR0MEMOBJFREEBSD pMemToMapOs2 = (PRTR0MEMOBJFREEBSD)pMemToMap;
546	switch (pMemToMapOs2->Core.enmType)
547	{
548	/*
549	* These has kernel mappings.
550	*/
551	case RTR0MEMOBJTYPE_PAGE:
552	case RTR0MEMOBJTYPE_LOW:
553	case RTR0MEMOBJTYPE_CONT:
554	pvR0 = pMemToMapOs2->Core.pv;
555	break;
556
557	case RTR0MEMOBJTYPE_PHYS_NC:
558	case RTR0MEMOBJTYPE_PHYS:
559	pvR0 = pMemToMapOs2->Core.pv;
560	if (!pvR0)
561	{
562	/* no ring-0 mapping, so allocate a mapping in the process. */
563	AssertMsgReturn(uAlignment == PAGE_SIZE, ("%#zx\n", uAlignment), VERR_NOT_SUPPORTED);
564	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
565	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
566	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
567	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS, &pvR0, (PPVOID)&ulPhys, NULL);
568	if (rc)
569	return RTErrConvertFromOS2(rc);
570	pMemToMapOs2->Core.pv = pvR0;
571	}
572	break;
573
574	case RTR0MEMOBJTYPE_LOCK:
575	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
576	return VERR_NOT_SUPPORTED; /** @todo implement this... */
577	pvR0 = pMemToMapOs2->Core.pv;
578	break;
579
580	case RTR0MEMOBJTYPE_RES_VIRT:
581	case RTR0MEMOBJTYPE_MAPPING:
582	default:
583	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
584	return VERR_INTERNAL_ERROR;
585	}
586
587	/*
588	* Create a dummy mapping object for it.
589	*
590	* All mappings are read/write/execute in OS/2 and there isn't
591	* any cache options, so sharing is ok. And the main memory object
592	* isn't actually freed until all the mappings have been freed up
593	* (reference counting).
594	*/
595	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING, pvR0, pMemToMapOs2->Core.cb);
596	if (pMemFreeBSD)
597	{
598	pMemFreeBSD->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
599	*ppMem = &pMemFreeBSD->Core;
600	return VINF_SUCCESS;
601	}
602	return VERR_NO_MEMORY;
603	#endif
604	return VERR_NOT_IMPLEMENTED;
605	}
606
607
608	/* see http://markmail.org/message/udhq33tefgtyfozs */
609	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
610	{
611	/*
612	* Check for unsupported stuff.
613	*/
614	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
615	AssertMsgReturn(R3PtrFixed == (RTR3PTR)-1, ("%p\n", R3PtrFixed), VERR_NOT_SUPPORTED);
616	if (uAlignment > PAGE_SIZE)
617	return VERR_NOT_SUPPORTED;
618
619	int rc;
620	vm_object_t pObjectToMap = ((PRTR0MEMOBJFREEBSD)pMemToMap)->pObject;
621	struct proc pProc = (struct proc )R0Process;
622	struct vm_map *pProcMap = &pProc->p_vmspace->vm_map;
623
624	/* calc protection */
625	vm_prot_t ProtectionFlags = 0;
626	if ((fProt & RTMEM_PROT_NONE) == RTMEM_PROT_NONE)
627	ProtectionFlags = VM_PROT_NONE;
628	if ((fProt & RTMEM_PROT_READ) == RTMEM_PROT_READ)
629	ProtectionFlags \|= VM_PROT_READ;
630	if ((fProt & RTMEM_PROT_WRITE) == RTMEM_PROT_WRITE)
631	ProtectionFlags \|= VM_PROT_WRITE;
632	if ((fProt & RTMEM_PROT_EXEC) == RTMEM_PROT_EXEC)
633	ProtectionFlags \|= VM_PROT_EXECUTE;
634
635	/* calc mapping address */
636	PROC_LOCK(pProc);
637	vm_offset_t AddrR3 = round_page((vm_offset_t)pProc->p_vmspace->vm_daddr + lim_max(pProc, RLIMIT_DATA));
638	PROC_UNLOCK(pProc);
639
640	vm_object_t pObjectNew = vm_object_allocate(OBJT_PHYS, pMemToMap->cb >> PAGE_SHIFT);
641	if (!RT_UNLIKELY(pObjectNew))
642	return VERR_NO_MEMORY;
643
644	/* Insert the object in the map. */
645	rc = vm_map_find(pProcMap, /* Map to insert the object in */
646	pObjectNew , /* Object to map */
647	0, /* Start offset in the object */
648	&AddrR3, /* Start address IN/OUT */
649	pMemToMap->cb, /* Size of the mapping */
650	TRUE, /* Whether a suitable address should be searched for first */
651	ProtectionFlags, /* protection flags */
652	VM_PROT_ALL, /* Maximum protection flags */
653	0); /* Copy on write */
654
655	/* Map the memory page by page into the destination map. */
656	if (rc == KERN_SUCCESS)
657	{
658	size_t cLeft = pMemToMap->cb >> PAGE_SHIFT;
659	vm_offset_t AddrToMap = (vm_offset_t)pMemToMap->pv;
660	pmap_t pPhysicalMap = pProcMap->pmap;
661	vm_offset_t AddrR3Dst = AddrR3;
662
663	/* Insert the memory page by page into the mapping. */
664	while (cLeft-- > 0)
665	{
666	vm_page_t Page = PHYS_TO_VM_PAGE(vtophys(AddrToMap));
667
668	#if __FreeBSD_version >= 701105
669	pmap_enter(pPhysicalMap, AddrR3Dst, VM_PROT_NONE, Page, ProtectionFlags, TRUE);
670	#else
671	pmap_enter(pPhysicalMap, AddrR3Dst, Page, ProtectionFlags, TRUE);
672	#endif
673	AddrToMap += PAGE_SIZE;
674	AddrR3Dst += PAGE_SIZE;
675	}
676	pObjectToMap = pObjectNew;
677	}
678	else
679	vm_object_deallocate(pObjectNew);
680
681	if (rc == KERN_SUCCESS)
682	{
683	/*
684	* Create a mapping object for it.
685	*/
686	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)rtR0MemObjNew(sizeof(RTR0MEMOBJFREEBSD),
687	RTR0MEMOBJTYPE_MAPPING,
688	(void *)AddrR3,
689	pMemToMap->cb);
690	if (pMemFreeBSD)
691	{
692	Assert((vm_offset_t)pMemFreeBSD->Core.pv == AddrR3);
693	pMemFreeBSD->Core.u.Mapping.R0Process = R0Process;
694	pMemFreeBSD->pMappingObject = pObjectToMap;
695	*ppMem = &pMemFreeBSD->Core;
696	return VINF_SUCCESS;
697	}
698
699	rc = vm_map_remove(pProcMap, ((vm_offset_t)AddrR3), ((vm_offset_t)AddrR3) + pMemToMap->cb);
700	AssertMsg(rc == KERN_SUCCESS, ("Deleting mapping failed\n"));
701	}
702
703	if (pObjectToMap)
704	vm_object_deallocate(pObjectToMap);
705
706	return VERR_NO_MEMORY;
707	}
708
709
710	int rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
711	{
712	NOREF(pMem);
713	NOREF(offSub);
714	NOREF(cbSub);
715	NOREF(fProt);
716	return VERR_NOT_SUPPORTED;
717	}
718
719
720	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
721	{
722	PRTR0MEMOBJFREEBSD pMemFreeBSD = (PRTR0MEMOBJFREEBSD)pMem;
723
724	switch (pMemFreeBSD->Core.enmType)
725	{
726	case RTR0MEMOBJTYPE_LOCK:
727	if ( pMemFreeBSD->Core.u.Lock.R0Process != NIL_RTR0PROCESS
728	&& pMemFreeBSD->Core.u.Lock.R0Process != (RTR0PROCESS)curproc)
729	{
730	/* later */
731	return NIL_RTHCPHYS;
732	}
733	/* fall thru*/
734	case RTR0MEMOBJTYPE_PAGE:
735	case RTR0MEMOBJTYPE_MAPPING:
736	{
737	uint8_t pb = (uint8_t )pMemFreeBSD->Core.pv + (iPage << PAGE_SHIFT);
738	return vtophys(pb);
739	}
740
741	case RTR0MEMOBJTYPE_CONT:
742	return pMemFreeBSD->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
743
744	case RTR0MEMOBJTYPE_PHYS:
745	return pMemFreeBSD->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
746
747	case RTR0MEMOBJTYPE_PHYS_NC:
748	case RTR0MEMOBJTYPE_RES_VIRT:
749	case RTR0MEMOBJTYPE_LOW:
750	default:
751	return NIL_RTHCPHYS;
752	}
753	}
754

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source: vbox/trunk/src/VBox/Runtime/r0drv/freebsd/memobj-r0drv-freebsd.c@ 23454

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