1/*
2 * Copyright 2020 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_rap.h"
29
30/**
31 * DOC: AMDGPU RAP debugfs test interface
32 *
33 * how to use?
34 * echo opcode > <debugfs_dir>/dri/xxx/rap_test
35 *
36 * opcode:
37 * currently, only 2 is supported by Linux host driver,
38 * opcode 2 stands for TA_CMD_RAP__VALIDATE_L0, used to
39 * trigger L0 policy validation, you can refer more detail
40 * from header file ta_rap_if.h
41 *
42 */
43static ssize_t amdgpu_rap_debugfs_write(struct file *f, const char __user *buf,
44 size_t size, loff_t *pos)
45{
46 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
47 struct ta_rap_shared_memory *rap_shared_mem;
48 struct ta_rap_cmd_output_data *rap_cmd_output;
49 struct drm_device *dev = adev_to_drm(adev);
50 uint32_t op;
51 enum ta_rap_status status;
52 int ret;
53
54 if (*pos || size != 2)
55 return -EINVAL;
56
57 ret = kstrtouint_from_user(s: buf, count: size, base: *pos, res: &op);
58 if (ret)
59 return ret;
60
61 ret = pm_runtime_get_sync(dev: dev->dev);
62 if (ret < 0) {
63 pm_runtime_put_autosuspend(dev: dev->dev);
64 return ret;
65 }
66
67 /* make sure gfx core is on, RAP TA cann't handle
68 * GFX OFF case currently.
69 */
70 amdgpu_gfx_off_ctrl(adev, enable: false);
71
72 switch (op) {
73 case 2:
74 ret = psp_rap_invoke(psp: &adev->psp, ta_cmd_id: op, status: &status);
75 if (!ret && status == TA_RAP_STATUS__SUCCESS) {
76 dev_info(adev->dev, "RAP L0 validate test success.\n");
77 } else {
78 rap_shared_mem = (struct ta_rap_shared_memory *)
79 adev->psp.rap_context.context.mem_context.shared_buf;
80 rap_cmd_output = &(rap_shared_mem->rap_out_message.output);
81
82 dev_info(adev->dev, "RAP test failed, the output is:\n");
83 dev_info(adev->dev, "\tlast_subsection: 0x%08x.\n",
84 rap_cmd_output->last_subsection);
85 dev_info(adev->dev, "\tnum_total_validate: 0x%08x.\n",
86 rap_cmd_output->num_total_validate);
87 dev_info(adev->dev, "\tnum_valid: 0x%08x.\n",
88 rap_cmd_output->num_valid);
89 dev_info(adev->dev, "\tlast_validate_addr: 0x%08x.\n",
90 rap_cmd_output->last_validate_addr);
91 dev_info(adev->dev, "\tlast_validate_val: 0x%08x.\n",
92 rap_cmd_output->last_validate_val);
93 dev_info(adev->dev, "\tlast_validate_val_exptd: 0x%08x.\n",
94 rap_cmd_output->last_validate_val_exptd);
95 }
96 break;
97 default:
98 dev_info(adev->dev, "Unsupported op id: %d, ", op);
99 dev_info(adev->dev, "Only support op 2(L0 validate test).\n");
100 break;
101 }
102
103 amdgpu_gfx_off_ctrl(adev, enable: true);
104 pm_runtime_put_autosuspend(dev: dev->dev);
105
106 return size;
107}
108
109static const struct file_operations amdgpu_rap_debugfs_ops = {
110 .owner = THIS_MODULE,
111 .read = NULL,
112 .write = amdgpu_rap_debugfs_write,
113 .llseek = default_llseek
114};
115
116void amdgpu_rap_debugfs_init(struct amdgpu_device *adev)
117{
118 struct drm_minor *minor = adev_to_drm(adev)->primary;
119
120 if (!adev->psp.rap_context.context.initialized)
121 return;
122
123 debugfs_create_file("rap_test", S_IWUSR, minor->debugfs_root,
124 adev, &amdgpu_rap_debugfs_ops);
125}
126

source code of linux/drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c