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(buf, size, *pos, &op);
58	if (ret)
59		return ret;
60
61	ret = pm_runtime_get_sync(dev->dev);
62	if (ret < 0) {
63		pm_runtime_put_autosuspend(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, false);
71
72	switch (op) {
73	case 2:
74		ret = psp_rap_invoke(&adev->psp, op, &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, true);
104	pm_runtime_mark_last_busy(dev->dev);
105	pm_runtime_put_autosuspend(dev->dev);
106
107	return size;
108}
109
110static const struct file_operations amdgpu_rap_debugfs_ops = {
111	.owner = THIS_MODULE,
112	.read = NULL,
113	.write = amdgpu_rap_debugfs_write,
114	.llseek = default_llseek
115};
116
117void amdgpu_rap_debugfs_init(struct amdgpu_device *adev)
118{
119	struct drm_minor *minor = adev_to_drm(adev)->primary;
120
121	if (!adev->psp.rap_context.context.initialized)
122		return;
123
124	debugfs_create_file("rap_test", S_IWUSR, minor->debugfs_root,
125				adev, &amdgpu_rap_debugfs_ops);
126}
127