1 /* 2 * Copyright (c) 2011-2014, The Linux Foundation. All rights reserved. 3 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above 10 * copyright notice, this list of conditions and the following 11 * disclaimer in the documentation and/or other materials provided 12 * with the distribution. 13 * * Neither the name of The Linux Foundation nor the names of its 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #define DEBUG 0 31 #define ATRACE_TAG (ATRACE_TAG_GRAPHICS | ATRACE_TAG_HAL) 32 #include <sys/ioctl.h> 33 #include <sys/mman.h> 34 #include <stdlib.h> 35 #include <fcntl.h> 36 #include <cutils/log.h> 37 #include <errno.h> 38 #include <utils/Trace.h> 39 #include "gralloc_priv.h" 40 #include "ionalloc.h" 41 42 using gralloc::IonAlloc; 43 44 #define ION_DEVICE "/dev/ion" 45 46 int IonAlloc::open_device() 47 { 48 if(mIonFd == FD_INIT) 49 mIonFd = open(ION_DEVICE, O_RDONLY); 50 51 if(mIonFd < 0 ) { 52 ALOGE("%s: Failed to open ion device - %s", 53 __FUNCTION__, strerror(errno)); 54 mIonFd = FD_INIT; 55 return -errno; 56 } 57 return 0; 58 } 59 60 void IonAlloc::close_device() 61 { 62 if(mIonFd >= 0) 63 close(mIonFd); 64 mIonFd = FD_INIT; 65 } 66 67 int IonAlloc::alloc_buffer(alloc_data& data) 68 { 69 ATRACE_CALL(); 70 Locker::Autolock _l(mLock); 71 int err = 0; 72 struct ion_handle_data handle_data; 73 struct ion_fd_data fd_data; 74 struct ion_allocation_data ionAllocData; 75 void *base = 0; 76 77 ionAllocData.len = data.size; 78 ionAllocData.align = data.align; 79 ionAllocData.heap_id_mask = data.flags & ~ION_SECURE; 80 ionAllocData.flags = data.uncached ? 0 : ION_FLAG_CACHED; 81 // ToDo: replace usage of alloc data structure with 82 // ionallocdata structure. 83 if (data.flags & ION_SECURE) 84 ionAllocData.flags |= ION_SECURE; 85 86 err = open_device(); 87 if (err) 88 return err; 89 if(ioctl(mIonFd, ION_IOC_ALLOC, &ionAllocData)) { 90 err = -errno; 91 ALOGE("ION_IOC_ALLOC failed with error - %s", strerror(errno)); 92 return err; 93 } 94 95 fd_data.handle = ionAllocData.handle; 96 handle_data.handle = ionAllocData.handle; 97 if(ioctl(mIonFd, ION_IOC_MAP, &fd_data)) { 98 err = -errno; 99 ALOGE("%s: ION_IOC_MAP failed with error - %s", 100 __FUNCTION__, strerror(errno)); 101 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 102 return err; 103 } 104 105 if(!(data.flags & ION_SECURE)) { 106 base = mmap(0, ionAllocData.len, PROT_READ|PROT_WRITE, 107 MAP_SHARED, fd_data.fd, 0); 108 if(base == MAP_FAILED) { 109 err = -errno; 110 ALOGE("%s: Failed to map the allocated memory: %s", 111 __FUNCTION__, strerror(errno)); 112 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 113 return err; 114 } 115 } 116 117 data.base = base; 118 data.fd = fd_data.fd; 119 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 120 ALOGD_IF(DEBUG, "ion: Allocated buffer base:%p size:%zu fd:%d", 121 data.base, ionAllocData.len, data.fd); 122 return 0; 123 } 124 125 126 int IonAlloc::free_buffer(void* base, unsigned int size, unsigned int offset, 127 int fd) 128 { 129 ATRACE_CALL(); 130 Locker::Autolock _l(mLock); 131 ALOGD_IF(DEBUG, "ion: Freeing buffer base:%p size:%u fd:%d", 132 base, size, fd); 133 int err = 0; 134 err = open_device(); 135 if (err) 136 return err; 137 138 if(base) 139 err = unmap_buffer(base, size, offset); 140 close(fd); 141 return err; 142 } 143 144 int IonAlloc::map_buffer(void **pBase, unsigned int size, unsigned int offset, 145 int fd) 146 { 147 ATRACE_CALL(); 148 int err = 0; 149 void *base = 0; 150 // It is a (quirky) requirement of ION to have opened the 151 // ion fd in the process that is doing the mapping 152 err = open_device(); 153 if (err) 154 return err; 155 156 base = mmap(0, size, PROT_READ| PROT_WRITE, 157 MAP_SHARED, fd, 0); 158 *pBase = base; 159 if(base == MAP_FAILED) { 160 err = -errno; 161 ALOGE("ion: Failed to map memory in the client: %s", 162 strerror(errno)); 163 } else { 164 ALOGD_IF(DEBUG, "ion: Mapped buffer base:%p size:%u offset:%u fd:%d", 165 base, size, offset, fd); 166 } 167 return err; 168 } 169 170 int IonAlloc::unmap_buffer(void *base, unsigned int size, 171 unsigned int /*offset*/) 172 { 173 ATRACE_CALL(); 174 ALOGD_IF(DEBUG, "ion: Unmapping buffer base:%p size:%u", base, size); 175 int err = 0; 176 if(munmap(base, size)) { 177 err = -errno; 178 ALOGE("ion: Failed to unmap memory at %p : %s", 179 base, strerror(errno)); 180 } 181 return err; 182 183 } 184 int IonAlloc::clean_buffer(void *base, unsigned int size, unsigned int offset, 185 int fd, int op) 186 { 187 ATRACE_CALL(); 188 ATRACE_INT("operation id", op); 189 struct ion_flush_data flush_data; 190 struct ion_fd_data fd_data; 191 struct ion_handle_data handle_data; 192 int err = 0; 193 194 err = open_device(); 195 if (err) 196 return err; 197 198 fd_data.fd = fd; 199 if (ioctl(mIonFd, ION_IOC_IMPORT, &fd_data)) { 200 err = -errno; 201 ALOGE("%s: ION_IOC_IMPORT failed with error - %s", 202 __FUNCTION__, strerror(errno)); 203 return err; 204 } 205 206 handle_data.handle = fd_data.handle; 207 flush_data.handle = fd_data.handle; 208 flush_data.vaddr = base; 209 // offset and length are unsigned int 210 flush_data.offset = offset; 211 flush_data.length = size; 212 213 struct ion_custom_data d; 214 switch(op) { 215 case CACHE_CLEAN: 216 d.cmd = ION_IOC_CLEAN_CACHES; 217 break; 218 case CACHE_INVALIDATE: 219 d.cmd = ION_IOC_INV_CACHES; 220 break; 221 case CACHE_CLEAN_AND_INVALIDATE: 222 default: 223 d.cmd = ION_IOC_CLEAN_INV_CACHES; 224 } 225 226 d.arg = (unsigned long int)&flush_data; 227 228 if(ioctl(mIonFd, ION_IOC_CUSTOM, &d)) { 229 err = -errno; 230 ALOGE("%s: ION_IOC_CLEAN_INV_CACHES failed with error - %s", 231 232 __FUNCTION__, strerror(errno)); 233 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 234 return err; 235 } 236 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 237 return 0; 238 } 239 240
