[69061] | 1 | /* $Id: hgsmimemalloc.c 98103 2023-01-17 14:15:46Z vboxsync $ */
|
---|
| 2 | /*
|
---|
[98103] | 3 | * Copyright (C) 2017-2023 Oracle and/or its affiliates.
|
---|
[69061] | 4 | *
|
---|
[69346] | 5 | * Permission is hereby granted, free of charge, to any person
|
---|
| 6 | * obtaining a copy of this software and associated documentation
|
---|
| 7 | * files (the "Software"), to deal in the Software without
|
---|
| 8 | * restriction, including without limitation the rights to use,
|
---|
| 9 | * copy, modify, merge, publish, distribute, sublicense, and/or sell
|
---|
| 10 | * copies of the Software, and to permit persons to whom the
|
---|
| 11 | * Software is furnished to do so, subject to the following
|
---|
| 12 | * conditions:
|
---|
[69061] | 13 | *
|
---|
[69346] | 14 | * The above copyright notice and this permission notice shall be
|
---|
| 15 | * included in all copies or substantial portions of the Software.
|
---|
[69061] | 16 | *
|
---|
[69346] | 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
---|
| 18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
---|
| 19 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
---|
| 20 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
---|
| 21 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
---|
| 22 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
---|
| 23 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
---|
| 24 | * OTHER DEALINGS IN THE SOFTWARE.
|
---|
[69061] | 25 | */
|
---|
| 26 |
|
---|
| 27 | /*
|
---|
| 28 | * Memory allocator
|
---|
| 29 | * ----------------
|
---|
| 30 | *
|
---|
| 31 | * Implementation
|
---|
| 32 | * --------------
|
---|
| 33 | *
|
---|
| 34 | * Since the X.Org driver is single threaded and works using an allocate,
|
---|
| 35 | * submit and free pattern, we replace the generic allocator with a simple
|
---|
| 36 | * Boolean. Need more be said?
|
---|
[71590] | 37 | *
|
---|
| 38 | * bird> Yes, it's buggy. You never set fAllocated. See HGSMIMAAlloc().
|
---|
[69061] | 39 | */
|
---|
| 40 |
|
---|
| 41 | #include <VBoxVideoIPRT.h>
|
---|
| 42 | #include <HGSMIMemAlloc.h>
|
---|
| 43 | #include <HGSMI.h>
|
---|
| 44 |
|
---|
| 45 | int HGSMIMAInit(HGSMIMADATA *pMA, const HGSMIAREA *pArea,
|
---|
| 46 | HGSMIOFFSET *paDescriptors, uint32_t cDescriptors, HGSMISIZE cbMaxBlock,
|
---|
| 47 | const HGSMIENV *pEnv)
|
---|
| 48 | {
|
---|
| 49 | (void)paDescriptors;
|
---|
| 50 | (void)cDescriptors;
|
---|
| 51 | (void)cbMaxBlock;
|
---|
| 52 | (void)pEnv;
|
---|
| 53 | if (!(pArea->cbArea < UINT32_C(0x80000000)))
|
---|
| 54 | return VERR_INVALID_PARAMETER;
|
---|
| 55 | if (!(pArea->cbArea >= HGSMI_MA_BLOCK_SIZE_MIN))
|
---|
| 56 | return VERR_INVALID_PARAMETER;
|
---|
| 57 |
|
---|
| 58 | pMA->area = *pArea;
|
---|
| 59 | pMA->fAllocated = false;
|
---|
| 60 | return VINF_SUCCESS;
|
---|
| 61 | }
|
---|
| 62 |
|
---|
| 63 | void HGSMIMAUninit(HGSMIMADATA *pMA)
|
---|
| 64 | {
|
---|
| 65 | (void)pMA;
|
---|
| 66 | }
|
---|
| 67 |
|
---|
[71590] | 68 | static HGSMIOFFSET HGSMIMAPointerToOffset(const HGSMIMADATA *pMA, const void RT_UNTRUSTED_VOLATILE_GUEST *pv)
|
---|
[69061] | 69 | {
|
---|
| 70 | if (HGSMIAreaContainsPointer(&pMA->area, pv))
|
---|
| 71 | return HGSMIPointerToOffset(&pMA->area, pv);
|
---|
| 72 |
|
---|
| 73 | AssertFailed();
|
---|
| 74 | return HGSMIOFFSET_VOID;
|
---|
| 75 | }
|
---|
| 76 |
|
---|
[71590] | 77 | static void RT_UNTRUSTED_VOLATILE_GUEST *HGSMIMAOffsetToPointer(const HGSMIMADATA *pMA, HGSMIOFFSET off)
|
---|
[69061] | 78 | {
|
---|
| 79 | if (HGSMIAreaContainsOffset(&pMA->area, off))
|
---|
| 80 | return HGSMIOffsetToPointer(&pMA->area, off);
|
---|
| 81 |
|
---|
| 82 | AssertFailed();
|
---|
| 83 | return NULL;
|
---|
| 84 | }
|
---|
| 85 |
|
---|
[71590] | 86 | void RT_UNTRUSTED_VOLATILE_GUEST *HGSMIMAAlloc(HGSMIMADATA *pMA, HGSMISIZE cb)
|
---|
[69061] | 87 | {
|
---|
| 88 | (void)cb;
|
---|
| 89 | if (pMA->fAllocated)
|
---|
| 90 | return NULL;
|
---|
| 91 | HGSMIOFFSET off = pMA->area.offBase;
|
---|
| 92 | return HGSMIMAOffsetToPointer(pMA, off);
|
---|
[71590] | 93 | pMA->fAllocated = true; /** @todo r=bird: Errr. what's this doing *after* the return statement? */
|
---|
[69061] | 94 | }
|
---|
| 95 |
|
---|
[71590] | 96 | void HGSMIMAFree(HGSMIMADATA *pMA, void RT_UNTRUSTED_VOLATILE_GUEST *pv)
|
---|
[69061] | 97 | {
|
---|
| 98 | HGSMIOFFSET off = HGSMIMAPointerToOffset(pMA, pv);
|
---|
| 99 | if (off != HGSMIOFFSET_VOID)
|
---|
| 100 | pMA->fAllocated = false;
|
---|
| 101 | else
|
---|
| 102 | AssertFailed();
|
---|
| 103 | }
|
---|
[71590] | 104 |
|
---|