19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#define LOG_TAG "MemoryHeapBase" 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <stdlib.h> 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <stdint.h> 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <unistd.h> 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <fcntl.h> 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <errno.h> 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <sys/types.h> 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <sys/stat.h> 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <sys/ioctl.h> 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <cutils/log.h> 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <cutils/ashmem.h> 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <cutils/atomic.h> 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 320795272aa226f4e965968a03daddc53ce30b7cdaMathias Agopian#include <binder/MemoryHeapBase.h> 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#if HAVE_ANDROID_OS 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <linux/android_pmem.h> 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectnamespace android { 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// --------------------------------------------------------------------------- 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectMemoryHeapBase::MemoryHeapBase() 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDevice(NULL), mNeedUnmap(false) 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectMemoryHeapBase::MemoryHeapBase(size_t size, uint32_t flags, char const * name) 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags), 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDevice(0), mNeedUnmap(false) 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project const size_t pagesize = getpagesize(); 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size = ((size + pagesize-1) & ~(pagesize-1)); 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fd = ashmem_create_region(name == NULL ? "MemoryHeapBase" : name, size); 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGE_IF(fd<0, "error creating ashmem region: %s", strerror(errno)); 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fd >= 0) { 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mapfd(fd, size) == NO_ERROR) { 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (flags & READ_ONLY) { 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ashmem_set_prot_region(fd, PROT_READ); 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectMemoryHeapBase::MemoryHeapBase(const char* device, size_t size, uint32_t flags) 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags), 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDevice(0), mNeedUnmap(false) 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 70baef6141a3239c7dd9bad0e2cd8a9ece5eef5a7eIliyan Malchev int open_flags = O_RDWR; 71baef6141a3239c7dd9bad0e2cd8a9ece5eef5a7eIliyan Malchev if (flags & NO_CACHING) 72baef6141a3239c7dd9bad0e2cd8a9ece5eef5a7eIliyan Malchev open_flags |= O_SYNC; 73baef6141a3239c7dd9bad0e2cd8a9ece5eef5a7eIliyan Malchev 74baef6141a3239c7dd9bad0e2cd8a9ece5eef5a7eIliyan Malchev int fd = open(device, open_flags); 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGE_IF(fd<0, "error opening %s: %s", device, strerror(errno)); 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fd >= 0) { 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project const size_t pagesize = getpagesize(); 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size = ((size + pagesize-1) & ~(pagesize-1)); 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mapfd(fd, size) == NO_ERROR) { 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDevice = device; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 85f99c18083e87ccf83430b29b53c7dea52a1675deBenny WongMemoryHeapBase::MemoryHeapBase(int fd, size_t size, uint32_t flags, uint32_t offset) 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags), 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDevice(0), mNeedUnmap(false) 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project const size_t pagesize = getpagesize(); 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size = ((size + pagesize-1) & ~(pagesize-1)); 91f99c18083e87ccf83430b29b53c7dea52a1675deBenny Wong mapfd(dup(fd), size, offset); 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectstatus_t MemoryHeapBase::init(int fd, void *base, int size, int flags, const char* device) 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFD != -1) { 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_OPERATION; 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFD = fd; 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBase = base; 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize = size; 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlags = flags; 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDevice = device; 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return NO_ERROR; 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 107f99c18083e87ccf83430b29b53c7dea52a1675deBenny Wongstatus_t MemoryHeapBase::mapfd(int fd, size_t size, uint32_t offset) 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (size == 0) { 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // try to figure out the size automatically 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#if HAVE_ANDROID_OS 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // first try the PMEM ioctl 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pmem_region reg; 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int err = ioctl(fd, PMEM_GET_TOTAL_SIZE, ®); 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (err == 0) 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size = reg.len; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (size == 0) { // try fstat 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project struct stat sb; 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fstat(fd, &sb) == 0) 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size = sb.st_size; 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if it didn't work, let mmap() fail. 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((mFlags & DONT_MAP_LOCALLY) == 0) { 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void* base = (uint8_t*)mmap(0, size, 128f99c18083e87ccf83430b29b53c7dea52a1675deBenny Wong PROT_READ|PROT_WRITE, MAP_SHARED, fd, offset); 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (base == MAP_FAILED) { 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOGE("mmap(fd=%d, size=%u) failed (%s)", 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fd, uint32_t(size), strerror(errno)); 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project close(fd); 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return -errno; 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //LOGD("mmap(fd=%d, base=%p, size=%lu)", fd, base, size); 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBase = base; 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNeedUnmap = true; 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBase = 0; // not MAP_FAILED 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNeedUnmap = false; 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFD = fd; 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize = size; 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return NO_ERROR; 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectMemoryHeapBase::~MemoryHeapBase() 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dispose(); 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectvoid MemoryHeapBase::dispose() 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fd = android_atomic_or(-1, &mFD); 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fd >= 0) { 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mNeedUnmap) { 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //LOGD("munmap(fd=%d, base=%p, size=%lu)", fd, mBase, mSize); 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project munmap(mBase, mSize); 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBase = 0; 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize = 0; 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project close(fd); 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectint MemoryHeapBase::getHeapID() const { 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFD; 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectvoid* MemoryHeapBase::getBase() const { 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mBase; 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectsize_t MemoryHeapBase::getSize() const { 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSize; 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectuint32_t MemoryHeapBase::getFlags() const { 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFlags; 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectconst char* MemoryHeapBase::getDevice() const { 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mDevice; 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// --------------------------------------------------------------------------- 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project}; // namespace android 188