1 /* 2 * Copyright (c) 2011-2012, 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 <linux/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 memset(base, 0, ionAllocData.len); 113 // Clean cache after memset 114 clean_buffer(base, data.size, data.offset, fd_data.fd, 115 CACHE_CLEAN_AND_INVALIDATE); 116 } 117 118 data.base = base; 119 data.fd = fd_data.fd; 120 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 121 ALOGD_IF(DEBUG, "ion: Allocated buffer base:%p size:%d fd:%d", 122 data.base, ionAllocData.len, data.fd); 123 return 0; 124 } 125 126 127 int IonAlloc::free_buffer(void* base, size_t size, int offset, int fd) 128 { 129 Locker::Autolock _l(mLock); 130 ALOGD_IF(DEBUG, "ion: Freeing buffer base:%p size:%d fd:%d", 131 base, size, fd); 132 int err = 0; 133 err = open_device(); 134 if (err) 135 return err; 136 137 if(base) 138 err = unmap_buffer(base, size, offset); 139 close(fd); 140 return err; 141 } 142 143 int IonAlloc::map_buffer(void **pBase, size_t size, int offset, int fd) 144 { 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:%d offset:%d fd:%d", 162 base, size, offset, fd); 163 } 164 return err; 165 } 166 167 int IonAlloc::unmap_buffer(void *base, size_t size, int offset) 168 { 169 ALOGD_IF(DEBUG, "ion: Unmapping buffer base:%p size:%d", base, size); 170 int err = 0; 171 if(munmap(base, size)) { 172 err = -errno; 173 ALOGE("ion: Failed to unmap memory at %p : %s", 174 base, strerror(errno)); 175 } 176 return err; 177 178 } 179 int IonAlloc::clean_buffer(void *base, size_t size, int offset, int fd, int op) 180 { 181 struct ion_flush_data flush_data; 182 struct ion_fd_data fd_data; 183 struct ion_handle_data handle_data; 184 struct ion_handle* handle; 185 int err = 0; 186 187 err = open_device(); 188 if (err) 189 return err; 190 191 fd_data.fd = fd; 192 if (ioctl(mIonFd, ION_IOC_IMPORT, &fd_data)) { 193 err = -errno; 194 ALOGE("%s: ION_IOC_IMPORT failed with error - %s", 195 __FUNCTION__, strerror(errno)); 196 return err; 197 } 198 199 handle_data.handle = fd_data.handle; 200 flush_data.handle = fd_data.handle; 201 flush_data.vaddr = base; 202 flush_data.offset = offset; 203 flush_data.length = size; 204 205 struct ion_custom_data d; 206 switch(op) { 207 case CACHE_CLEAN: 208 d.cmd = ION_IOC_CLEAN_CACHES; 209 break; 210 case CACHE_INVALIDATE: 211 d.cmd = ION_IOC_INV_CACHES; 212 break; 213 case CACHE_CLEAN_AND_INVALIDATE: 214 default: 215 d.cmd = ION_IOC_CLEAN_INV_CACHES; 216 } 217 218 d.arg = (unsigned long int)&flush_data; 219 220 if(ioctl(mIonFd, ION_IOC_CUSTOM, &d)) { 221 err = -errno; 222 ALOGE("%s: ION_IOC_CLEAN_INV_CACHES failed with error - %s", 223 224 __FUNCTION__, strerror(errno)); 225 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 226 return err; 227 } 228 ioctl(mIonFd, ION_IOC_FREE, &handle_data); 229 return 0; 230 } 231 232
