Line data Source code
1 : /*
2 : * Copyright 2021 Advanced Micro Devices, Inc.
3 : *
4 : * Permission is hereby granted, free of charge, to any person obtaining a
5 : * copy of this software and associated documentation files (the "Software"),
6 : * to deal in the Software without restriction, including without limitation
7 : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 : * and/or sell copies of the Software, and to permit persons to whom the
9 : * Software is furnished to do so, subject to the following conditions:
10 : *
11 : * The above copyright notice and this permission notice shall be included in
12 : * all copies or substantial portions of the Software.
13 : *
14 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 : * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 : * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 : * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 : * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 : * OTHER DEALINGS IN THE SOFTWARE.
21 : *
22 : *
23 : */
24 : #include <linux/debugfs.h>
25 : #include <linux/pm_runtime.h>
26 :
27 : #include "amdgpu.h"
28 : #include "amdgpu_securedisplay.h"
29 :
30 : /**
31 : * DOC: AMDGPU SECUREDISPLAY debugfs test interface
32 : *
33 : * how to use?
34 : * echo opcode <value> > <debugfs_dir>/dri/xxx/securedisplay_test
35 : * eg. echo 1 > <debugfs_dir>/dri/xxx/securedisplay_test
36 : * eg. echo 2 phy_id > <debugfs_dir>/dri/xxx/securedisplay_test
37 : *
38 : * opcode:
39 : * 1：Query whether TA is responding used only for validation pupose
40 : * 2: Send region of Interest and CRC value to I2C. (uint32)phy_id is
41 : * send to determine which DIO scratch register should be used to get
42 : * ROI and receive i2c_buf as the output.
43 : *
44 : * You can refer more detail from header file ta_securedisplay_if.h
45 : *
46 : */
47 :
48 0 : void psp_securedisplay_parse_resp_status(struct psp_context *psp,
49 : enum ta_securedisplay_status status)
50 : {
51 0 : switch (status) {
52 : case TA_SECUREDISPLAY_STATUS__SUCCESS:
53 : break;
54 : case TA_SECUREDISPLAY_STATUS__GENERIC_FAILURE:
55 0 : dev_err(psp->adev->dev, "Secure display: Generic Failure.");
56 0 : break;
57 : case TA_SECUREDISPLAY_STATUS__INVALID_PARAMETER:
58 0 : dev_err(psp->adev->dev, "Secure display: Invalid Parameter.");
59 0 : break;
60 : case TA_SECUREDISPLAY_STATUS__NULL_POINTER:
61 0 : dev_err(psp->adev->dev, "Secure display: Null Pointer.");
62 0 : break;
63 : case TA_SECUREDISPLAY_STATUS__I2C_WRITE_ERROR:
64 0 : dev_err(psp->adev->dev, "Secure display: Failed to write to I2C.");
65 0 : break;
66 : case TA_SECUREDISPLAY_STATUS__READ_DIO_SCRATCH_ERROR:
67 0 : dev_err(psp->adev->dev, "Secure display: Failed to Read DIO Scratch Register.");
68 0 : break;
69 : case TA_SECUREDISPLAY_STATUS__READ_CRC_ERROR:
70 0 : dev_err(psp->adev->dev, "Secure display: Failed to Read CRC");
71 0 : break;
72 : case TA_SECUREDISPLAY_STATUS__I2C_INIT_ERROR:
73 0 : dev_err(psp->adev->dev, "Secure display: Failed to initialize I2C.");
74 0 : break;
75 : default:
76 0 : dev_err(psp->adev->dev, "Secure display: Failed to parse status: %d\n", status);
77 : }
78 0 : }
79 :
80 0 : void psp_prep_securedisplay_cmd_buf(struct psp_context *psp, struct securedisplay_cmd **cmd,
81 : enum ta_securedisplay_command command_id)
82 : {
83 0 : *cmd = (struct securedisplay_cmd *)psp->securedisplay_context.context.mem_context.shared_buf;
84 0 : memset(*cmd, 0, sizeof(struct securedisplay_cmd));
85 0 : (*cmd)->status = TA_SECUREDISPLAY_STATUS__GENERIC_FAILURE;
86 0 : (*cmd)->cmd_id = command_id;
87 0 : }
88 :
89 : #if defined(CONFIG_DEBUG_FS)
90 :
91 : static ssize_t amdgpu_securedisplay_debugfs_write(struct file *f, const char __user *buf,
92 : size_t size, loff_t *pos)
93 : {
94 : struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
95 : struct psp_context *psp = &adev->psp;
96 : struct securedisplay_cmd *securedisplay_cmd;
97 : struct drm_device *dev = adev_to_drm(adev);
98 : uint32_t phy_id;
99 : uint32_t op;
100 : char str[64];
101 : int ret;
102 :
103 : if (*pos || size > sizeof(str) - 1)
104 : return -EINVAL;
105 :
106 : memset(str, 0, sizeof(str));
107 : ret = copy_from_user(str, buf, size);
108 : if (ret)
109 : return -EFAULT;
110 :
111 : ret = pm_runtime_get_sync(dev->dev);
112 : if (ret < 0) {
113 : pm_runtime_put_autosuspend(dev->dev);
114 : return ret;
115 : }
116 :
117 : if (size < 3)
118 : sscanf(str, "%u ", &op);
119 : else
120 : sscanf(str, "%u %u", &op, &phy_id);
121 :
122 : switch (op) {
123 : case 1:
124 : psp_prep_securedisplay_cmd_buf(psp, &securedisplay_cmd,
125 : TA_SECUREDISPLAY_COMMAND__QUERY_TA);
126 : ret = psp_securedisplay_invoke(psp, TA_SECUREDISPLAY_COMMAND__QUERY_TA);
127 : if (!ret) {
128 : if (securedisplay_cmd->status == TA_SECUREDISPLAY_STATUS__SUCCESS)
129 : dev_info(adev->dev, "SECUREDISPLAY: query securedisplay TA ret is 0x%X\n",
130 : securedisplay_cmd->securedisplay_out_message.query_ta.query_cmd_ret);
131 : else
132 : psp_securedisplay_parse_resp_status(psp, securedisplay_cmd->status);
133 : }
134 : break;
135 : case 2:
136 : psp_prep_securedisplay_cmd_buf(psp, &securedisplay_cmd,
137 : TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC);
138 : securedisplay_cmd->securedisplay_in_message.send_roi_crc.phy_id = phy_id;
139 : ret = psp_securedisplay_invoke(psp, TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC);
140 : if (!ret) {
141 : if (securedisplay_cmd->status == TA_SECUREDISPLAY_STATUS__SUCCESS) {
142 : dev_info(adev->dev, "SECUREDISPLAY: I2C buffer out put is: %*ph\n",
143 : TA_SECUREDISPLAY_I2C_BUFFER_SIZE,
144 : securedisplay_cmd->securedisplay_out_message.send_roi_crc.i2c_buf);
145 : } else {
146 : psp_securedisplay_parse_resp_status(psp, securedisplay_cmd->status);
147 : }
148 : }
149 : break;
150 : default:
151 : dev_err(adev->dev, "Invalid input: %s\n", str);
152 : }
153 :
154 : pm_runtime_mark_last_busy(dev->dev);
155 : pm_runtime_put_autosuspend(dev->dev);
156 :
157 : return size;
158 : }
159 :
160 : static const struct file_operations amdgpu_securedisplay_debugfs_ops = {
161 : .owner = THIS_MODULE,
162 : .read = NULL,
163 : .write = amdgpu_securedisplay_debugfs_write,
164 : .llseek = default_llseek
165 : };
166 :
167 : #endif
168 :
169 0 : void amdgpu_securedisplay_debugfs_init(struct amdgpu_device *adev)
170 : {
171 : #if defined(CONFIG_DEBUG_FS)
172 :
173 : if (!adev->psp.securedisplay_context.context.initialized)
174 : return;
175 :
176 : debugfs_create_file("securedisplay_test", S_IWUSR, adev_to_drm(adev)->primary->debugfs_root,
177 : adev, &amdgpu_securedisplay_debugfs_ops);
178 : #endif
179 0 : }
|
