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
|
/*
* Copyright 2020 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <linux/debugfs.h>
#include <linux/firmware.h>
#include <linux/dma-mapping.h>
#include "amdgpu.h"
#include "amdgpu_fw_attestation.h"
#include "amdgpu_psp.h"
#include "amdgpu_ucode.h"
#include "soc15_common.h"
#define FW_ATTESTATION_DB_COOKIE 0x143b6a37
#define FW_ATTESTATION_RECORD_VALID 1
#define FW_ATTESTATION_MAX_SIZE 4096
typedef struct FW_ATT_DB_HEADER
{
uint32_t AttDbVersion; /* version of the fwar feature */
uint32_t AttDbCookie; /* cookie as an extra check for corrupt data */
} FW_ATT_DB_HEADER;
typedef struct FW_ATT_RECORD
{
uint16_t AttFwIdV1; /* Legacy FW Type field */
uint16_t AttFwIdV2; /* V2 FW ID field */
uint32_t AttFWVersion; /* FW Version */
uint16_t AttFWActiveFunctionID; /* The VF ID (only in VF Attestation Table) */
uint16_t AttSource; /* FW source indicator */
uint16_t RecordValid; /* Indicates whether the record is a valid entry */
uint8_t AttFwTaId; /* Ta ID (only in TA Attestation Table) */
uint8_t Reserved;
} FW_ATT_RECORD;
static ssize_t amdgpu_fw_attestation_debugfs_read(struct file *f,
char __user *buf,
size_t size,
loff_t *pos)
{
struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
uint64_t records_addr = 0;
uint64_t vram_pos = 0;
FW_ATT_DB_HEADER fw_att_hdr = {0};
FW_ATT_RECORD fw_att_record = {0};
if (size < sizeof(FW_ATT_RECORD)) {
DRM_WARN("FW attestation input buffer not enough memory");
return -EINVAL;
}
if ((*pos + sizeof(FW_ATT_DB_HEADER)) >= FW_ATTESTATION_MAX_SIZE) {
DRM_WARN("FW attestation out of bounds");
return 0;
}
if (psp_get_fw_attestation_records_addr(&adev->psp, &records_addr)) {
DRM_WARN("Failed to get FW attestation record address");
return -EINVAL;
}
vram_pos = records_addr - adev->gmc.vram_start;
if (*pos == 0) {
amdgpu_device_vram_access(adev,
vram_pos,
(uint32_t*)&fw_att_hdr,
sizeof(FW_ATT_DB_HEADER),
false);
if (fw_att_hdr.AttDbCookie != FW_ATTESTATION_DB_COOKIE) {
DRM_WARN("Invalid FW attestation cookie");
return -EINVAL;
}
DRM_INFO("FW attestation version = 0x%X", fw_att_hdr.AttDbVersion);
}
amdgpu_device_vram_access(adev,
vram_pos + sizeof(FW_ATT_DB_HEADER) + *pos,
(uint32_t*)&fw_att_record,
sizeof(FW_ATT_RECORD),
false);
if (fw_att_record.RecordValid != FW_ATTESTATION_RECORD_VALID)
return 0;
if (copy_to_user(buf, (void*)&fw_att_record, sizeof(FW_ATT_RECORD)))
return -EINVAL;
*pos += sizeof(FW_ATT_RECORD);
return sizeof(FW_ATT_RECORD);
}
static const struct file_operations amdgpu_fw_attestation_debugfs_ops = {
.owner = THIS_MODULE,
.read = amdgpu_fw_attestation_debugfs_read,
.write = NULL,
.llseek = default_llseek
};
static int amdgpu_is_fw_attestation_supported(struct amdgpu_device *adev)
{
if (adev->asic_type >= CHIP_SIENNA_CICHLID)
return 1;
return 0;
}
void amdgpu_fw_attestation_debugfs_init(struct amdgpu_device *adev)
{
if (!amdgpu_is_fw_attestation_supported(adev))
return;
debugfs_create_file("amdgpu_fw_attestation",
S_IRUSR,
adev_to_drm(adev)->primary->debugfs_root,
adev,
&amdgpu_fw_attestation_debugfs_ops);
}
|
