1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/** @file
The definition for DMA access Library.
Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __DMA_ACCESS_LIB_H__
#define __DMA_ACCESS_LIB_H__
typedef struct {
EFI_ACPI_DMAR_HEADER *AcpiDmarTable;
UINT64 EngineMask;
UINT8 HostAddressWidth;
UINTN VTdEngineCount;
UINT64 VTdEngineAddress[1];
} VTD_INFO;
/**
Set DMA protected region.
@param VTdInfo The VTd engine context information.
@param EngineMask The mask of the VTd engine to be accessed.
@param LowMemoryBase The protected low memory region base.
@param LowMemoryLength The protected low memory region length.
@param HighMemoryBase The protected high memory region base.
@param HighMemoryLength The protected high memory region length.
@retval EFI_SUCCESS The DMA protection is set.
@retval EFI_UNSUPPORTED The DMA protection is not set.
**/
EFI_STATUS
SetDmaProtectedRange (
IN VTD_INFO *VTdInfo,
IN UINT64 EngineMask,
IN UINT32 LowMemoryBase,
IN UINT32 LowMemoryLength,
IN UINT64 HighMemoryBase,
IN UINT64 HighMemoryLength
);
/**
Diable DMA protection.
@param VTdInfo The VTd engine context information.
@param EngineMask The mask of the VTd engine to be accessed.
@retval DMA protection is disabled.
**/
EFI_STATUS
DisableDmaProtection (
IN VTD_INFO *VTdInfo,
IN UINT64 EngineMask
);
/**
Return if the DMA protection is enabled.
@param VTdInfo The VTd engine context information.
@param EngineMask The mask of the VTd engine to be accessed.
@retval TRUE DMA protection is enabled in at least one VTd engine.
@retval FALSE DMA protection is disabled in all VTd engines.
**/
UINT64
GetDmaProtectionEnabledEngineMask (
IN VTD_INFO *VTdInfo,
IN UINT64 EngineMask
);
/**
Get protected low memory alignment.
@param VTdInfo The VTd engine context information.
@param EngineMask The mask of the VTd engine to be accessed.
@return protected low memory alignment.
**/
UINT32
GetLowMemoryAlignment (
IN VTD_INFO *VTdInfo,
IN UINT64 EngineMask
);
/**
Get protected high memory alignment.
@param VTdInfo The VTd engine context information.
@param EngineMask The mask of the VTd engine to be accessed.
@return protected high memory alignment.
**/
UINT64
GetHighMemoryAlignment (
IN VTD_INFO *VTdInfo,
IN UINT64 EngineMask
);
/**
Enable VTd translation table protection.
@param VTdInfo The VTd engine context information.
@param EngineMask The mask of the VTd engine to be accessed.
**/
VOID
EnableVTdTranslationProtection (
IN VTD_INFO *VTdInfo,
IN UINT64 EngineMask
);
/**
Disable VTd translation table protection.
@param VTdInfo The VTd engine context information.
@param EngineMask The mask of the VTd engine to be accessed.
**/
VOID
DisableVTdTranslationProtection (
IN VTD_INFO *VTdInfo,
IN UINT64 EngineMask
);
/**
Parse DMAR DRHD table.
@param[in] AcpiDmarTable DMAR ACPI table
@return EFI_SUCCESS The DMAR DRHD table is parsed.
**/
EFI_STATUS
ParseDmarAcpiTableDrhd (
IN EFI_ACPI_DMAR_HEADER *AcpiDmarTable
);
/**
Parse DMAR DRHD table.
@param VTdInfo The VTd engine context information.
**/
VOID
ParseDmarAcpiTableRmrr (
IN VTD_INFO *VTdInfo
);
/**
Dump DMAR ACPI table.
@param[in] Dmar DMAR ACPI table
**/
VOID
DumpAcpiDMAR (
IN EFI_ACPI_DMAR_HEADER *Dmar
);
extern EFI_GUID mVTdInfoGuid;
#endif
|