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 <cutils/trace.h> 40#include "gralloc_priv.h" 41#include "ionalloc.h" 42 43using gralloc::IonAlloc; 44 45#define ION_DEVICE "/dev/ion" 46 47int IonAlloc::open_device() 48{ 49 if(mIonFd == FD_INIT) 50 mIonFd = open(ION_DEVICE, O_RDONLY); 51 52 if(mIonFd < 0 ) { 53 ALOGE("%s: Failed to open ion device - %s", 54 __FUNCTION__, strerror(errno)); 55 mIonFd = FD_INIT; 56 return -errno; 57 } 58 return 0; 59} 60 61void IonAlloc::close_device() 62{ 63 if(mIonFd >= 0) 64 close(mIonFd); 65 mIonFd = FD_INIT; 66} 67 68int IonAlloc::alloc_buffer(alloc_data& data) 69{ 70 ATRACE_CALL(); 71 Locker::Autolock _l(mLock); 72 int err = 0; 73 struct ion_handle_data handle_data; 74 struct ion_fd_data fd_data; 75 struct ion_allocation_data ionAllocData; 76 void *base = 0; 77 78 ionAllocData.len = data.size; 79 ionAllocData.align = data.align; 80 ionAllocData.heap_id_mask = data.heapId; 81 ionAllocData.flags = data.flags; 82 ionAllocData.flags |= data.uncached ? 0 : ION_FLAG_CACHED; 83 err = open_device(); 84 if (err) 85 return err; 86 if(ioctl(mIonFd, ION_IOC_ALLOC, &ionAllocData)) { 87 err = -errno; 88 ALOGE("ION_IOC_ALLOC failed with error - %s", strerror(errno)); 89 return err; 90 } 91 92 fd_data.handle = ionAllocData.handle; 93 handle_data.handle = ionAllocData.handle; 94 if(ioctl(mIonFd, ION_IOC_MAP, &fd_data)) { 95 err = -errno; 96 ALOGE("%s: ION_IOC_MAP failed with error - %s", 97 __FUNCTION__, strerror(errno)); 98 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 99 return err; 100 } 101 102 if(!(data.flags & ION_SECURE)) { 103 base = mmap(0, ionAllocData.len, PROT_READ|PROT_WRITE, 104 MAP_SHARED, fd_data.fd, 0); 105 if(base == MAP_FAILED) { 106 err = -errno; 107 ALOGE("%s: Failed to map the allocated memory: %s", 108 __FUNCTION__, strerror(errno)); 109 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 110 return err; 111 } 112 } 113 114 data.base = base; 115 data.fd = fd_data.fd; 116 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 117 ALOGD_IF(DEBUG, "ion: Allocated buffer base:%p size:%zu fd:%d", 118 data.base, ionAllocData.len, data.fd); 119 return 0; 120} 121 122 123int IonAlloc::free_buffer(void* base, unsigned int size, unsigned int offset, 124 int fd) 125{ 126 ATRACE_CALL(); 127 Locker::Autolock _l(mLock); 128 ALOGD_IF(DEBUG, "ion: Freeing buffer base:%p size:%u fd:%d", 129 base, size, fd); 130 int err = 0; 131 err = open_device(); 132 if (err) 133 return err; 134 135 if(base) 136 err = unmap_buffer(base, size, offset); 137 close(fd); 138 return err; 139} 140 141int IonAlloc::map_buffer(void **pBase, unsigned int size, unsigned int offset, 142 int fd) 143{ 144 ATRACE_CALL(); 145 int err = 0; 146 void *base = 0; 147 // It is a (quirky) requirement of ION to have opened the 148 // ion fd in the process that is doing the mapping 149 err = open_device(); 150 if (err) 151 return err; 152 153 base = mmap(0, size, PROT_READ| PROT_WRITE, 154 MAP_SHARED, fd, 0); 155 *pBase = base; 156 if(base == MAP_FAILED) { 157 err = -errno; 158 ALOGE("ion: Failed to map memory in the client: %s", 159 strerror(errno)); 160 } else { 161 ALOGD_IF(DEBUG, "ion: Mapped buffer base:%p size:%u offset:%u fd:%d", 162 base, size, offset, fd); 163 } 164 return err; 165} 166 167int IonAlloc::unmap_buffer(void *base, unsigned int size, 168 unsigned int /*offset*/) 169{ 170 ATRACE_CALL(); 171 ALOGD_IF(DEBUG, "ion: Unmapping buffer base:%p size:%u", base, size); 172 int err = 0; 173 if(munmap(base, size)) { 174 err = -errno; 175 ALOGE("ion: Failed to unmap memory at %p : %s", 176 base, strerror(errno)); 177 } 178 return err; 179 180} 181int IonAlloc::clean_buffer(void *base, unsigned int size, unsigned int offset, 182 int fd, int op) 183{ 184 ATRACE_CALL(); 185 ATRACE_INT("operation id", op); 186 struct ion_flush_data flush_data; 187 struct ion_fd_data fd_data; 188 struct ion_handle_data handle_data; 189 int err = 0; 190 191 err = open_device(); 192 if (err) 193 return err; 194 195 fd_data.fd = fd; 196 if (ioctl(mIonFd, ION_IOC_IMPORT, &fd_data)) { 197 err = -errno; 198 ALOGE("%s: ION_IOC_IMPORT failed with error - %s", 199 __FUNCTION__, strerror(errno)); 200 return err; 201 } 202 203 handle_data.handle = fd_data.handle; 204 flush_data.handle = fd_data.handle; 205 flush_data.vaddr = base; 206 // offset and length are unsigned int 207 flush_data.offset = offset; 208 flush_data.length = size; 209 210 struct ion_custom_data d; 211 switch(op) { 212 case CACHE_CLEAN: 213 d.cmd = ION_IOC_CLEAN_CACHES; 214 break; 215 case CACHE_INVALIDATE: 216 d.cmd = ION_IOC_INV_CACHES; 217 break; 218 case CACHE_CLEAN_AND_INVALIDATE: 219 default: 220 d.cmd = ION_IOC_CLEAN_INV_CACHES; 221 } 222 223 d.arg = (unsigned long int)&flush_data; 224 225 if(ioctl(mIonFd, ION_IOC_CUSTOM, &d)) { 226 err = -errno; 227 ALOGE("%s: ION_IOC_CLEAN_INV_CACHES failed with error - %s", 228 229 __FUNCTION__, strerror(errno)); 230 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 231 return err; 232 } 233 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 234 return 0; 235} 236 237