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
|
/****************************************************************************
*
* Copyright (C) 2005 - 2014 by Vivante Corp.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the license, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*****************************************************************************/
#ifndef _GC_HAL_SECURITY_INTERFACE_H_
#define _GC_HAL_SECURITY_INTERFACE_H_
/*!
@brief Command codes between kernel module and TrustZone
@discussion
Critical services must be done in TrustZone to avoid sensitive content leak. Most of kernel module is kept in non-Secure os to minimize
code in TrustZone.
*/
typedef enum kernel_packet_command {
KERNEL_START_COMMAND,
KERNEL_SUBMIT,
KERNEL_MAP_MEMORY, /* */
KERNEL_UNMAP_MEMORY,
KERNEL_ALLOCATE_SECRUE_MEMORY, /*! Security memory management. */
KERNEL_FREE_SECURE_MEMORY,
KERNEL_EXECUTE, /* Execute a command buffer. */
} kernel_packet_command_t;
/*!
@brief gckCOMMAND Object requests TrustZone to start FE.
@discussion
DMA enabled register can only be written in TrustZone to avoid GPU from jumping to a hacked code.
Kernel module need use these command to ask TrustZone start command parser.
*/
struct kernel_start_command {
kernel_packet_command_t command; /*! The command (always needs to be the first entry in a structure). */
gctUINT8 gpu; /*! Which GPU. */
};
/*!
@brief gckCOMMAND Object requests TrustZone to submit command buffer.
@discussion
Code in trustzone will check content of command buffer after copying command buffer to TrustZone.
*/
struct kernel_submit {
kernel_packet_command_t command; /*! The command (always needs to be the first entry in a structure). */
gctUINT8 gpu; /*! Which GPU. */
gctUINT8 kernel_command; /*! Whether it is a kernel command. */
gctUINT32 command_buffer_handle; /*! Handle to command buffer. */
gctUINT32 offset; /* Offset in command buffer. */
gctUINT32 * command_buffer; /*! Content of command buffer need to be submit. */
gctUINT32 command_buffer_length; /*! Length of command buffer. */
};
/*!
@brief gckVIDMEM Object requests TrustZone to allocate security memory.
@discussion
Allocate a buffer from security GPU memory.
*/
struct kernel_allocate_security_memory {
kernel_packet_command_t command; /*! The command (always needs to be the first entry in a structure). */
gctUINT32 bytes; /*! Requested bytes. */
gctUINT32 memory_handle; /*! Handle of allocated memory. */
};
/*!
@brief gckVIDMEM Object requests TrustZone to allocate security memory.
@discussion
Free a video memory buffer from security GPU memory.
*/
struct kernel_free_security_memory {
kernel_packet_command_t command; /*! The command (always needs to be the first entry in a structure). */
gctUINT32 memory_handle; /*! Handle of allocated memory. */
};
struct kernel_execute {
kernel_packet_command_t command; /*! The command (always needs to be the first entry in a structure). */
gctUINT8 gpu; /*! Which GPU. */
gctUINT8 kernel_command; /*! Whether it is a kernel command. */
gctUINT32 * command_buffer; /*! Content of command buffer need to be submit. */
gctUINT32 command_buffer_length; /*! Length of command buffer. */
};
typedef struct kernel_map_scatter_gather {
gctUINT32 bytes;
gctUINT32 physical;
struct kernel_map_scatter_gather *next;
}
kernel_map_scatter_gather_t;
struct kernel_map_memory {
kernel_packet_command_t command;
kernel_map_scatter_gather_t *scatter;
gctUINT32 *physicals;
gctUINT32 pageCount;
gctUINT32 gpuAddress;
};
struct kernel_unmap_memory {
gctUINT32 gpuAddress;
gctUINT32 pageCount;
};
typedef struct _gcsTA_INTERFACE {
kernel_packet_command_t command;
union {
struct kernel_submit Submit;
struct kernel_start_command StartCommand;
struct kernel_allocate_security_memory AllocateSecurityMemory;
struct kernel_execute Execute;
struct kernel_map_memory MapMemory;
struct kernel_unmap_memory UnmapMemory;
} u;
gceSTATUS result;
} gcsTA_INTERFACE;
enum {
gcvTA_COMMAND_INIT,
gcvTA_COMMAND_DISPATCH,
gcvTA_CALLBACK_ALLOC_SECURE_MEM,
gcvTA_CALLBACK_FREE_SECURE_MEM,
};
#endif
|
