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 #include <sys/ioctl.h> 32 #include <sys/mman.h> 33 #include <stdlib.h> 34 #include <fcntl.h> 35 #include <cutils/log.h> 36 #include <errno.h> 37 #include "gralloc_priv.h" 38 #include "ionalloc.h" 39 40 using gralloc::IonAlloc; 41 42 #define ION_DEVICE "/dev/ion" 43 44 int IonAlloc::open_device() 45 { 46 if(mIonFd == FD_INIT) 47 mIonFd = open(ION_DEVICE, O_RDONLY); 48 49 if(mIonFd < 0 ) { 50 ALOGE("%s: Failed to open ion device - %s", 51 __FUNCTION__, strerror(errno)); 52 mIonFd = FD_INIT; 53 return -errno; 54 } 55 return 0; 56 } 57 58 void IonAlloc::close_device() 59 { 60 if(mIonFd >= 0) 61 close(mIonFd); 62 mIonFd = FD_INIT; 63 } 64 65 int IonAlloc::alloc_buffer(alloc_data& data) 66 { 67 Locker::Autolock _l(mLock); 68 int err = 0; 69 struct ion_handle_data handle_data; 70 struct ion_fd_data fd_data; 71 struct ion_allocation_data ionAllocData; 72 void *base = 0; 73 74 ionAllocData.len = data.size; 75 ionAllocData.align = data.align; 76 ionAllocData.heap_mask = data.flags & ~ION_SECURE; 77 ionAllocData.flags = data.uncached ? 0 : ION_FLAG_CACHED; 78 // ToDo: replace usage of alloc data structure with 79 // ionallocdata structure. 80 if (data.flags & ION_SECURE) 81 ionAllocData.flags |= ION_SECURE; 82 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 } 121 122 123 int IonAlloc::free_buffer(void* base, size_t size, size_t offset, int fd) 124 { 125 Locker::Autolock _l(mLock); 126 ALOGD_IF(DEBUG, "ion: Freeing buffer base:%p size:%zu fd:%d", 127 base, size, fd); 128 int err = 0; 129 err = open_device(); 130 if (err) 131 return err; 132 133 if(base) 134 err = unmap_buffer(base, size, offset); 135 close(fd); 136 return err; 137 } 138 139 int IonAlloc::map_buffer(void **pBase, size_t size, size_t offset, int fd) 140 { 141 int err = 0; 142 void *base = 0; 143 // It is a (quirky) requirement of ION to have opened the 144 // ion fd in the process that is doing the mapping 145 err = open_device(); 146 if (err) 147 return err; 148 149 base = mmap(0, size, PROT_READ| PROT_WRITE, 150 MAP_SHARED, fd, 0); 151 *pBase = base; 152 if(base == MAP_FAILED) { 153 err = -errno; 154 ALOGE("ion: Failed to map memory in the client: %s", 155 strerror(errno)); 156 } else { 157 ALOGD_IF(DEBUG, "ion: Mapped buffer base:%p size:%zu offset:%d fd:%d", 158 base, size, offset, fd); 159 } 160 return err; 161 } 162 163 int IonAlloc::unmap_buffer(void *base, size_t size, size_t /*offset*/) 164 { 165 ALOGD_IF(DEBUG, "ion: Unmapping buffer base:%p size:%zu", base, size); 166 int err = 0; 167 if(munmap(base, size)) { 168 err = -errno; 169 ALOGE("ion: Failed to unmap memory at %p : %s", 170 base, strerror(errno)); 171 } 172 return err; 173 174 } 175 int IonAlloc::clean_buffer(void *base, size_t size, size_t offset, int fd, int op) 176 { 177 struct ion_flush_data flush_data; 178 struct ion_fd_data fd_data; 179 struct ion_handle_data handle_data; 180 int err = 0; 181 182 err = open_device(); 183 if (err) 184 return err; 185 186 fd_data.fd = fd; 187 if (ioctl(mIonFd, ION_IOC_IMPORT, &fd_data)) { 188 err = -errno; 189 ALOGE("%s: ION_IOC_IMPORT failed with error - %s", 190 __FUNCTION__, strerror(errno)); 191 return err; 192 } 193 194 handle_data.handle = fd_data.handle; 195 flush_data.handle = fd_data.handle; 196 flush_data.vaddr = base; 197 // offset and length are uint32_t 198 flush_data.offset = (uint32_t) offset; 199 flush_data.length = (uint32_t) size; 200 201 struct ion_custom_data d; 202 switch(op) { 203 case CACHE_CLEAN: 204 d.cmd = ION_IOC_CLEAN_CACHES; 205 break; 206 case CACHE_INVALIDATE: 207 d.cmd = ION_IOC_INV_CACHES; 208 break; 209 case CACHE_CLEAN_AND_INVALIDATE: 210 default: 211 d.cmd = ION_IOC_CLEAN_INV_CACHES; 212 } 213 214 d.arg = (unsigned long int)&flush_data; 215 216 if(ioctl(mIonFd, ION_IOC_CUSTOM, &d)) { 217 err = -errno; 218 ALOGE("%s: ION_IOC_CLEAN_INV_CACHES failed with error - %s", 219 220 __FUNCTION__, strerror(errno)); 221 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 222 return err; 223 } 224 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 225 return 0; 226 } 227 228
