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#ifdef __linux__
31
32/**
33 * DOC: AMDGPU RAP debugfs test interface
34 *
35 * how to use?
36 * echo opcode > <debugfs_dir>/dri/xxx/rap_test
37 *
38 * opcode:
39 * currently, only 2 is supported by Linux host driver,
40 * opcode 2 stands for TA_CMD_RAP__VALIDATE_L0, used to
41 * trigger L0 policy validation, you can refer more detail
42 * from header file ta_rap_if.h
43 *
44 */
45static ssize_t amdgpu_rap_debugfs_write(struct file *f, const char __user *buf,
46		size_t size, loff_t *pos)
47{
48	struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
49	struct ta_rap_shared_memory *rap_shared_mem;
50	struct ta_rap_cmd_output_data *rap_cmd_output;
51	struct drm_device *dev = adev_to_drm(adev);
52	uint32_t op;
53	enum ta_rap_status status;
54	int ret;
55
56	if (*pos || size != 2)
57		return -EINVAL;
58
59	ret = kstrtouint_from_user(buf, size, *pos, &op);
60	if (ret)
61		return ret;
62
63	ret = pm_runtime_get_sync(dev->dev);
64	if (ret < 0) {
65		pm_runtime_put_autosuspend(dev->dev);
66		return ret;
67	}
68
69	/* make sure gfx core is on, RAP TA cann't handle
70	 * GFX OFF case currently.
71	 */
72	amdgpu_gfx_off_ctrl(adev, false);
73
74	switch (op) {
75	case 2:
76		ret = psp_rap_invoke(&adev->psp, op, &status);
77		if (!ret && status == TA_RAP_STATUS__SUCCESS) {
78			dev_info(adev->dev, "RAP L0 validate test success.\n");
79		} else {
80			rap_shared_mem = (struct ta_rap_shared_memory *)
81					 adev->psp.rap_context.context.mem_context.shared_buf;
82			rap_cmd_output = &(rap_shared_mem->rap_out_message.output);
83
84			dev_info(adev->dev, "RAP test failed, the output is:\n");
85			dev_info(adev->dev, "\tlast_subsection: 0x%08x.\n",
86				 rap_cmd_output->last_subsection);
87			dev_info(adev->dev, "\tnum_total_validate: 0x%08x.\n",
88				 rap_cmd_output->num_total_validate);
89			dev_info(adev->dev, "\tnum_valid: 0x%08x.\n",
90				 rap_cmd_output->num_valid);
91			dev_info(adev->dev, "\tlast_validate_addr: 0x%08x.\n",
92				 rap_cmd_output->last_validate_addr);
93			dev_info(adev->dev, "\tlast_validate_val: 0x%08x.\n",
94				 rap_cmd_output->last_validate_val);
95			dev_info(adev->dev, "\tlast_validate_val_exptd: 0x%08x.\n",
96				 rap_cmd_output->last_validate_val_exptd);
97		}
98		break;
99	default:
100		dev_info(adev->dev, "Unsupported op id: %d, ", op);
101		dev_info(adev->dev, "Only support op 2(L0 validate test).\n");
102		break;
103	}
104
105	amdgpu_gfx_off_ctrl(adev, true);
106	pm_runtime_mark_last_busy(dev->dev);
107	pm_runtime_put_autosuspend(dev->dev);
108
109	return size;
110}
111
112static const struct file_operations amdgpu_rap_debugfs_ops = {
113	.owner = THIS_MODULE,
114	.read = NULL,
115	.write = amdgpu_rap_debugfs_write,
116	.llseek = default_llseek
117};
118
119#endif /* __linux__ */
120
121void amdgpu_rap_debugfs_init(struct amdgpu_device *adev)
122{
123	struct drm_minor *minor = adev_to_drm(adev)->primary;
124
125	if (!adev->psp.rap_context.context.initialized)
126		return;
127
128	debugfs_create_file("rap_test", S_IWUSR, minor->debugfs_root,
129				adev, &amdgpu_rap_debugfs_ops);
130}
131