1 /* 2 * ion.c 3 * 4 * Memory Allocator functions for ion 5 * 6 * Copyright 2011 Google, Inc 7 * 8 * Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 #define LOG_TAG "ion" 21 22 #include <cutils/log.h> 23 #include <errno.h> 24 #include <fcntl.h> 25 #include <stdio.h> 26 #include <sys/ioctl.h> 27 #include <sys/mman.h> 28 #include <sys/types.h> 29 30 #include <linux/ion.h> 31 #include <ion/ion.h> 32 33 int ion_open() 34 { 35 int fd = open("/dev/ion", O_RDWR); 36 if (fd < 0) 37 ALOGE("open /dev/ion failed!\n"); 38 return fd; 39 } 40 41 int ion_close(int fd) 42 { 43 return close(fd); 44 } 45 46 static int ion_ioctl(int fd, int req, void *arg) 47 { 48 int ret = ioctl(fd, req, arg); 49 if (ret < 0) { 50 ALOGE("ioctl %d failed with code %d: %s\n", req, 51 ret, strerror(errno)); 52 return -errno; 53 } 54 return ret; 55 } 56 57 int ion_alloc(int fd, size_t len, size_t align, 58 unsigned int flags, struct ion_handle **handle) 59 { 60 int ret; 61 struct ion_allocation_data data = { 62 .len = len, 63 .align = align, 64 .flags = flags, 65 }; 66 67 ret = ion_ioctl(fd, ION_IOC_ALLOC, &data); 68 if (ret < 0) 69 return ret; 70 *handle = data.handle; 71 return ret; 72 } 73 74 int ion_alloc_tiler(int fd, size_t w, size_t h, int fmt, unsigned int flags, 75 struct ion_handle **handle, size_t *stride) 76 { 77 int ret; 78 struct omap_ion_tiler_alloc_data alloc_data = { 79 .w = w, 80 .h = h, 81 .fmt = fmt, 82 .flags = flags, 83 .out_align = PAGE_SIZE, 84 .token = 0, 85 }; 86 87 struct ion_custom_data custom_data = { 88 .cmd = OMAP_ION_TILER_ALLOC, 89 .arg = (unsigned long)(&alloc_data), 90 }; 91 92 ret = ion_ioctl(fd, ION_IOC_CUSTOM, &custom_data); 93 if (ret < 0) 94 return ret; 95 *stride = alloc_data.stride; 96 *handle = alloc_data.handle; 97 return ret; 98 } 99 100 int ion_free(int fd, struct ion_handle *handle) 101 { 102 struct ion_handle_data data = { 103 .handle = handle, 104 }; 105 return ion_ioctl(fd, ION_IOC_FREE, &data); 106 } 107 108 int ion_map(int fd, struct ion_handle *handle, size_t length, int prot, 109 int flags, off_t offset, unsigned char **ptr, int *map_fd) 110 { 111 struct ion_fd_data data = { 112 .handle = handle, 113 }; 114 int ret = ion_ioctl(fd, ION_IOC_MAP, &data); 115 if (ret < 0) 116 return ret; 117 *map_fd = data.fd; 118 if (*map_fd < 0) { 119 ALOGE("map ioctl returned negative fd\n"); 120 return -EINVAL; 121 } 122 *ptr = mmap(NULL, length, prot, flags, *map_fd, offset); 123 if (*ptr == MAP_FAILED) { 124 ALOGE("mmap failed: %s\n", strerror(errno)); 125 return -errno; 126 } 127 return ret; 128 } 129 130 int ion_share(int fd, struct ion_handle *handle, int *share_fd) 131 { 132 int map_fd; 133 struct ion_fd_data data = { 134 .handle = handle, 135 }; 136 int ret = ion_ioctl(fd, ION_IOC_SHARE, &data); 137 if (ret < 0) 138 return ret; 139 *share_fd = data.fd; 140 if (*share_fd < 0) { 141 ALOGE("map ioctl returned negative fd\n"); 142 return -EINVAL; 143 } 144 return ret; 145 } 146 147 int ion_import(int fd, int share_fd, struct ion_handle **handle) 148 { 149 struct ion_fd_data data = { 150 .fd = share_fd, 151 }; 152 int ret = ion_ioctl(fd, ION_IOC_IMPORT, &data); 153 if (ret < 0) 154 return ret; 155 *handle = data.handle; 156 return ret; 157 } 158 159 #if 0 160 int ion_sync_fd(int fd, int handle_fd) 161 { 162 struct ion_fd_data data = { 163 .fd = handle_fd, 164 }; 165 return ion_ioctl(fd, ION_IOC_SYNC, &data); 166 } 167 #endif 168 169 int ion_map_cacheable(int fd, struct ion_handle *handle, size_t length, int prot, 170 int flags, off_t offset, unsigned char **ptr, int *map_fd) 171 { 172 struct ion_fd_data data = { 173 .handle = handle, 174 .cacheable = 1, 175 }; 176 int ret = ion_ioctl(fd, ION_IOC_MAP, &data); 177 if (ret < 0) 178 return ret; 179 *map_fd = data.fd; 180 if (*map_fd < 0) { 181 ALOGE("map ioctl returned negative fd\n"); 182 return -EINVAL; 183 } 184 *ptr = mmap(NULL, length, prot, flags, *map_fd, offset); 185 if (*ptr == MAP_FAILED) { 186 ALOGE("mmap failed: %s\n", strerror(errno)); 187 return -errno; 188 } 189 return ret; 190 } 191 192 int ion_flush_cached(int fd, struct ion_handle *handle, size_t length, 193 unsigned char *ptr) 194 { 195 struct ion_cached_user_buf_data data = { 196 .handle = handle, 197 .vaddr = (unsigned long)ptr, 198 .size = length, 199 }; 200 return ion_ioctl(fd, ION_IOC_FLUSH_CACHED, &data); 201 } 202 203 int ion_inval_cached(int fd, struct ion_handle *handle, size_t length, 204 unsigned char *ptr) 205 { 206 struct ion_cached_user_buf_data data = { 207 .handle = handle, 208 .vaddr = (unsigned long)ptr, 209 .size = length, 210 }; 211 return ion_ioctl(fd, ION_IOC_INVAL_CACHED, &data); 212 } 213
