249 lines
7.4 KiB
C++
249 lines
7.4 KiB
C++
/*
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Code Aurora Forum, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/ioctl.h>
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#include <sys/mman.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <cutils/log.h>
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#include <errno.h>
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#include "ionalloc.h"
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using gralloc::IonAlloc;
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#define ION_DEVICE "/dev/ion"
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int IonAlloc::open_device()
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{
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if(mIonFd == FD_INIT)
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mIonFd = open(ION_DEVICE, O_RDONLY);
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if(mIonFd < 0 ) {
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LOGE("%s: Failed to open ion device - %s",
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__FUNCTION__, strerror(errno));
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mIonFd = FD_INIT;
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return -errno;
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}
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return 0;
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}
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void IonAlloc::close_device()
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{
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if(mIonFd > 0)
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close(mIonFd);
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mIonFd = FD_INIT;
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}
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int IonAlloc::alloc_buffer(alloc_data& data)
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{
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int err = 0;
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int ionSyncFd = FD_INIT;
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int iFd = FD_INIT;
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struct ion_handle_data handle_data;
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struct ion_fd_data fd_data;
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struct ion_allocation_data ionAllocData;
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void *base = 0;
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ionAllocData.len = data.size;
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ionAllocData.align = data.align;
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ionAllocData.flags = data.flags;
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err = open_device();
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if (err)
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return err;
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if(data.uncached) {
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// Use the sync FD to alloc and map
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// when we need uncached memory
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ionSyncFd = open(ION_DEVICE, O_RDONLY|O_DSYNC);
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if(ionSyncFd < 0) {
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LOGE("%s: Failed to open ion device - %s",
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__FUNCTION__, strerror(errno));
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close_device();
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return -errno;
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}
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iFd = ionSyncFd;
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} else {
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iFd = mIonFd;
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}
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err = ioctl(iFd, ION_IOC_ALLOC, &ionAllocData);
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if(err) {
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LOGE("ION_IOC_ALLOC failed with error - %s", strerror(errno));
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close_device();
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if(ionSyncFd >= 0)
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close(ionSyncFd);
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ionSyncFd = FD_INIT;
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return err;
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}
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fd_data.handle = ionAllocData.handle;
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handle_data.handle = ionAllocData.handle;
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LOGD("%s: Trying ION_IOC_MAP pid=%d handle=%p size=%d mIonFd=%d flags=%x",
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__FUNCTION__, getpid(), ionAllocData.handle,
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ionAllocData.len, mIonFd, ionAllocData.flags);
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err = ioctl(iFd, ION_IOC_MAP, &fd_data);
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if(err) {
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LOGE("%s: ION_IOC_MAP failed with error - %s",
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__FUNCTION__, strerror(errno));
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ioctl(mIonFd, ION_IOC_FREE, &handle_data);
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close_device();
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if(ionSyncFd >= 0)
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close(ionSyncFd);
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ionSyncFd = FD_INIT;
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return err;
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}
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base = mmap(0, ionAllocData.len, PROT_READ|PROT_WRITE,
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MAP_SHARED, fd_data.fd, 0);
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if(base == MAP_FAILED) {
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LOGD("%s: Failed to map the allocated memory: %s",
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__FUNCTION__, strerror(errno));
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err = -errno;
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ioctl(mIonFd, ION_IOC_FREE, &handle_data);
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close_device();
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ionSyncFd = FD_INIT;
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return err;
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}
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//Close the uncached FD since we no longer need it;
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if(ionSyncFd >= 0)
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close(ionSyncFd);
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ionSyncFd = FD_INIT;
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memset(base, 0, ionAllocData.len);
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// Clean cache after memset
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clean_buffer(base, data.size, data.offset, fd_data.fd);
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data.base = base;
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data.fd = fd_data.fd;
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ioctl(mIonFd, ION_IOC_FREE, &handle_data);
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LOGD("%s: ION alloc succeeded - mIonFd=%d, SharedFD=%d PID=%d size=%d"
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" ionHandle=%p", __FUNCTION__, mIonFd, fd_data.fd, getpid(),
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ionAllocData.len, ionAllocData.handle);
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return err;
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}
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int IonAlloc::free_buffer(void* base, size_t size, int offset, int fd)
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{
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LOGD("%s:Freeing buffer size=%d base=%p mIonFd=%d fd=%d PID=%d",
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__FUNCTION__, size, base, mIonFd, fd, getpid());
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int err = 0;
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err = open_device();
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if (err)
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return err;
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if(!base) {
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LOGE("Invalid free");
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return -EINVAL;
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}
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err = unmap_buffer(base, size, offset);
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close(fd);
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return err;
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}
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int IonAlloc::map_buffer(void **pBase, size_t size, int offset, int fd)
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{
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LOGD("%s: Mapping buffer fd=%d size=%d PID=%d", __FUNCTION__,
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fd, size, getpid());
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int err = 0;
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void *base = 0;
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// It is a (quirky) requirement of ION to have opened the
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// ion fd in the process that is doing the mapping
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err = open_device();
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if (err)
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return err;
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base = mmap(0, size, PROT_READ| PROT_WRITE,
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MAP_SHARED, fd, 0);
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*pBase = base;
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if(base == MAP_FAILED) {
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LOGD("%s: Failed to map memory in the client: %s",
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__FUNCTION__, strerror(errno));
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err = -errno;
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} else {
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LOGD("%s: Successfully mapped %d bytes", __FUNCTION__, size);
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}
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return err;
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}
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int IonAlloc::unmap_buffer(void *base, size_t size, int offset)
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{
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LOGD("%s: Unmapping buffer at address %p", __FUNCTION__, base);
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int err = munmap(base, size);
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if(err) {
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LOGE("%s: Failed to unmap memory at %p: %s",
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__FUNCTION__, base, strerror(errno));
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}
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return err;
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}
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int IonAlloc::clean_buffer(void *base, size_t size, int offset, int fd)
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{
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// LOGD("%s: Clean buffer fd=%d base = %p size=%d PID=%d", __FUNCTION__,
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// fd, base, size, getpid());
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struct ion_flush_data flush_data;
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struct ion_fd_data fd_data;
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struct ion_handle_data handle_data;
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struct ion_handle* handle;
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int err = 0;
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err = open_device();
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if (err)
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return err;
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fd_data.fd = fd;
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err = ioctl(mIonFd, ION_IOC_IMPORT, &fd_data);
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if(err) {
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LOGE("%s: ION_IOC_IMPORT failed with error - %s",
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__FUNCTION__, strerror(errno));
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close_device();
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return err;
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}
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handle_data.handle = fd_data.handle;
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flush_data.handle = fd_data.handle;
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flush_data.vaddr = base;
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flush_data.offset = offset;
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flush_data.length = size;
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err = ioctl(mIonFd, ION_IOC_CLEAN_INV_CACHES, &flush_data);
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if(err) {
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LOGE("%s: ION_IOC_CLEAN_INV_CACHES failed with error - %s",
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__FUNCTION__, strerror(errno));
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ioctl(mIonFd, ION_IOC_FREE, &handle_data);
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close_device();
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return err;
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}
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ioctl(mIonFd, ION_IOC_FREE, &handle_data);
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return err;
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}
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