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  */
43 static 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 
110 static 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 
117 void amdgpu_rap_debugfs_init(struct amdgpu_device *adev)
118 {
119 #if defined(CONFIG_DEBUG_FS)
120 	struct drm_minor *minor = adev_to_drm(adev)->primary;
121 
122 	if (!adev->psp.rap_context.context.initialized)
123 		return;
124 
125 	debugfs_create_file("rap_test", S_IWUSR, minor->debugfs_root,
126 				adev, &amdgpu_rap_debugfs_ops);
127 #endif
128 }
129