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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* Copyright 2021 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/pm_runtime.h>
#include "amdgpu.h"
#include "amdgpu_securedisplay.h"
/**
* DOC: AMDGPU SECUREDISPLAY debugfs test interface
*
* how to use?
* echo opcode <value> > <debugfs_dir>/dri/xxx/securedisplay_test
* eg. echo 1 > <debugfs_dir>/dri/xxx/securedisplay_test
* eg. echo 2 phy_id > <debugfs_dir>/dri/xxx/securedisplay_test
*
* opcode:
* 1：Query whether TA is responding used only for validation pupose
* 2: Send region of Interest and CRC value to I2C. (uint32)phy_id is
* send to determine which DIO scratch register should be used to get
* ROI and receive i2c_buf as the output.
*
* You can refer more detail from header file ta_securedisplay_if.h
*
*/
void psp_securedisplay_parse_resp_status(struct psp_context *psp,
enum ta_securedisplay_status status)
{
switch (status) {
case TA_SECUREDISPLAY_STATUS__SUCCESS:
break;
case TA_SECUREDISPLAY_STATUS__GENERIC_FAILURE:
dev_err(psp->adev->dev, "Secure display: Generic Failure.");
break;
case TA_SECUREDISPLAY_STATUS__INVALID_PARAMETER:
dev_err(psp->adev->dev, "Secure display: Invalid Parameter.");
break;
case TA_SECUREDISPLAY_STATUS__NULL_POINTER:
dev_err(psp->adev->dev, "Secure display: Null Pointer.");
break;
case TA_SECUREDISPLAY_STATUS__I2C_WRITE_ERROR:
dev_err(psp->adev->dev, "Secure display: Failed to write to I2C.");
break;
case TA_SECUREDISPLAY_STATUS__READ_DIO_SCRATCH_ERROR:
dev_err(psp->adev->dev, "Secure display: Failed to Read DIO Scratch Register.");
break;
case TA_SECUREDISPLAY_STATUS__READ_CRC_ERROR:
dev_err(psp->adev->dev, "Secure display: Failed to Read CRC");
break;
case TA_SECUREDISPLAY_STATUS__I2C_INIT_ERROR:
dev_err(psp->adev->dev, "Secure display: Failed to initialize I2C.");
break;
default:
dev_err(psp->adev->dev, "Secure display: Failed to parse status: %d\n", status);
}
}
void psp_prep_securedisplay_cmd_buf(struct psp_context *psp, struct ta_securedisplay_cmd **cmd,
enum ta_securedisplay_command command_id)
{
*cmd = (struct ta_securedisplay_cmd *)psp->securedisplay_context.context.mem_context.shared_buf;
memset(*cmd, 0, sizeof(struct ta_securedisplay_cmd));
(*cmd)->status = TA_SECUREDISPLAY_STATUS__GENERIC_FAILURE;
(*cmd)->cmd_id = command_id;
}
#if defined(CONFIG_DEBUG_FS)
static ssize_t amdgpu_securedisplay_debugfs_write(struct file *f, const char __user *buf,
size_t size, loff_t *pos)
{
struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
struct psp_context *psp = &adev->psp;
struct ta_securedisplay_cmd *securedisplay_cmd;
struct drm_device *dev = adev_to_drm(adev);
uint32_t phy_id;
uint32_t op;
char str[64];
int ret;
if (*pos || size > sizeof(str) - 1)
return -EINVAL;
memset(str, 0, sizeof(str));
ret = copy_from_user(str, buf, size);
if (ret)
return -EFAULT;
ret = pm_runtime_get_sync(dev->dev);
if (ret < 0) {
pm_runtime_put_autosuspend(dev->dev);
return ret;
}
if (size < 3)
sscanf(str, "%u ", &op);
else
sscanf(str, "%u %u", &op, &phy_id);
switch (op) {
case 1:
mutex_lock(&psp->securedisplay_context.mutex);
psp_prep_securedisplay_cmd_buf(psp, &securedisplay_cmd,
TA_SECUREDISPLAY_COMMAND__QUERY_TA);
ret = psp_securedisplay_invoke(psp, TA_SECUREDISPLAY_COMMAND__QUERY_TA);
if (!ret) {
if (securedisplay_cmd->status == TA_SECUREDISPLAY_STATUS__SUCCESS)
dev_info(adev->dev, "SECUREDISPLAY: query securedisplay TA ret is 0x%X\n",
securedisplay_cmd->securedisplay_out_message.query_ta.query_cmd_ret);
else
psp_securedisplay_parse_resp_status(psp, securedisplay_cmd->status);
}
mutex_unlock(&psp->securedisplay_context.mutex);
break;
case 2:
mutex_lock(&psp->securedisplay_context.mutex);
psp_prep_securedisplay_cmd_buf(psp, &securedisplay_cmd,
TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC);
securedisplay_cmd->securedisplay_in_message.send_roi_crc.phy_id = phy_id;
ret = psp_securedisplay_invoke(psp, TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC);
if (!ret) {
if (securedisplay_cmd->status == TA_SECUREDISPLAY_STATUS__SUCCESS) {
dev_info(adev->dev, "SECUREDISPLAY: I2C buffer out put is: %*ph\n",
TA_SECUREDISPLAY_I2C_BUFFER_SIZE,
securedisplay_cmd->securedisplay_out_message.send_roi_crc.i2c_buf);
} else {
psp_securedisplay_parse_resp_status(psp, securedisplay_cmd->status);
}
}
mutex_unlock(&psp->securedisplay_context.mutex);
break;
default:
dev_err(adev->dev, "Invalid input: %s\n", str);
}
pm_runtime_mark_last_busy(dev->dev);
pm_runtime_put_autosuspend(dev->dev);
return size;
}
static const struct file_operations amdgpu_securedisplay_debugfs_ops = {
.owner = THIS_MODULE,
.read = NULL,
.write = amdgpu_securedisplay_debugfs_write,
.llseek = default_llseek
};
#endif
void amdgpu_securedisplay_debugfs_init(struct amdgpu_device *adev)
{
#if defined(CONFIG_DEBUG_FS)
if (!adev->psp.securedisplay_context.context.initialized)
return;
debugfs_create_file("securedisplay_test", S_IWUSR, adev_to_drm(adev)->primary->debugfs_root,
adev, &amdgpu_securedisplay_debugfs_ops);
#endif
}
|
