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 KEEPON_THREAD_NUM 900
30 #define TRY_TIMES KEEPON_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 #define DRM_TEGRA_OPEN_CHANNEL 0x05
58 #define DRM_TEGRA_CLOSE_CHANNEL 0x06
59 #define DRM_TEGRA_START_KEEPON 0x10
60
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_keepon {
72 volatile __u64 context;
73 };
74
75 #define DRM_IOCTL_BASE 'd'
76 #define DRM_IOWR(nr,type) _IOWR(DRM_IOCTL_BASE,nr,type)
77
78 #define DRM_IOCTL_TEGRA_OPEN_CHANNEL DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_OPEN_CHANNEL, struct drm_tegra_open_channel)
79 #define DRM_IOCTL_TEGRA_CLOSE_CHANNEL DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_CLOSE_CHANNEL, struct drm_tegra_open_channel)
80 #define DRM_IOCTL_TEGRA_START_KEEPON DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_START_KEEPON, struct drm_tegra_keepon)
81
82 int fd;
83 pthread_t keepon_thread_id[KEEPON_THREAD_NUM] = { 0 };
84
85 volatile struct drm_tegra_open_channel open_c = { 0 };
86 volatile struct drm_tegra_close_channel close_c = { 0 };
87 volatile struct drm_tegra_keepon keepon_c = { 0 };
88
set_affinity(int num)89 static int set_affinity(int num)
90 {
91 int ret = 0;
92 cpu_set_t mask;
93 CPU_ZERO(&mask);
94 CPU_SET(num, &mask);
95 ret = sched_setaffinity(0, sizeof(cpu_set_t), &mask);
96 if(ret == -1){
97 }
98 return ret;
99 }
100
prepare()101 static void prepare()
102 {
103 open_c.client = HOST1X_CLASS_VIC;
104 }
105
keepon_thread(void * no_use)106 void* keepon_thread(void* no_use)
107 {
108 set_affinity(1);
109
110 while(1){
111 ioctl(fd, DRM_IOCTL_TEGRA_START_KEEPON, &keepon_c);
112 }
113 }
114
main()115 int main()
116 {
117 int i, try_time = TRY_TIMES, ret;
118
119 /* bind_cpu */
120 set_affinity(0);
121
122 /* open dev */
123 fd = open(DEV,O_RDONLY);
124 if(fd == -1){
125 return 0;
126 }
127
128 /* prepare ioctl cmd */
129 prepare();
130
131 /* create keepon thread */
132 for(i = 0; i < KEEPON_THREAD_NUM; i++){
133 ret = pthread_create(keepon_thread_id + i, NULL, keepon_thread, NULL);
134 if(ret){
135 goto out_keepon_thread;
136 }
137 }
138
139 while(try_time){
140 /* open */
141 ret = ioctl(fd, DRM_IOCTL_TEGRA_OPEN_CHANNEL, &open_c);
142 if(ret == 0){
143 try_time--;
144 /* set keepon */
145 keepon_c.context = open_c.context;
146 /* set close */
147 close_c.context = open_c.context;
148 usleep(500);
149 ret = ioctl(fd, DRM_IOCTL_TEGRA_CLOSE_CHANNEL, &close_c);
150 }
151 }
152
153 out_keepon_thread:
154 /* kill keepon thread */
155 for(i = 0; i < KEEPON_THREAD_NUM; i++){
156 pthread_kill(keepon_thread_id[i], SIGKILL);
157 }
158 out_dev:
159 close(fd);
160 return 0;
161 }
162