242 lines
7.2 KiB
C++
242 lines
7.2 KiB
C++
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <limits.h>
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <stdarg.h>
|
|
|
|
#include <sys/mman.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include <cutils/log.h>
|
|
#include <cutils/atomic.h>
|
|
|
|
#include <hardware/hardware.h>
|
|
#include <hardware/gralloc.h>
|
|
|
|
#include <linux/android_pmem.h>
|
|
|
|
#include "gralloc_priv.h"
|
|
|
|
|
|
// we need this for now because pmem cannot mmap at an offset
|
|
#define PMEM_HACK 1
|
|
|
|
/* desktop Linux needs a little help with gettid() */
|
|
#if defined(ARCH_X86) && !defined(HAVE_ANDROID_OS)
|
|
#define __KERNEL__
|
|
# include <linux/unistd.h>
|
|
pid_t gettid() { return syscall(__NR_gettid);}
|
|
#undef __KERNEL__
|
|
#endif
|
|
|
|
/*****************************************************************************/
|
|
|
|
static int gralloc_map(gralloc_module_t const* module,
|
|
buffer_handle_t handle,
|
|
void** vaddr)
|
|
{
|
|
private_handle_t* hnd = (private_handle_t*)handle;
|
|
if (!(hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)) {
|
|
size_t size = hnd->size;
|
|
#if PMEM_HACK
|
|
size += hnd->offset;
|
|
#endif
|
|
void* mappedAddress = mmap(0, size,
|
|
PROT_READ|PROT_WRITE, MAP_SHARED, hnd->fd, 0);
|
|
if (mappedAddress == MAP_FAILED) {
|
|
LOGE("Could not mmap handle %p, fd=%d (%s)",
|
|
handle, hnd->fd, strerror(errno));
|
|
hnd->base = 0;
|
|
return -errno;
|
|
}
|
|
hnd->base = intptr_t(mappedAddress) + hnd->offset;
|
|
//LOGD("gralloc_map() succeeded fd=%d, off=%d, size=%d, vaddr=%p",
|
|
// hnd->fd, hnd->offset, hnd->size, mappedAddress);
|
|
}
|
|
*vaddr = (void*)hnd->base;
|
|
return 0;
|
|
}
|
|
|
|
static int gralloc_unmap(gralloc_module_t const* module,
|
|
buffer_handle_t handle)
|
|
{
|
|
private_handle_t* hnd = (private_handle_t*)handle;
|
|
if (!(hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)) {
|
|
void* base = (void*)hnd->base;
|
|
size_t size = hnd->size;
|
|
#if PMEM_HACK
|
|
base = (void*)(intptr_t(base) - hnd->offset);
|
|
size += hnd->offset;
|
|
#endif
|
|
//LOGD("unmapping from %p, size=%d, flags=%08x", base, size, hnd->flags);
|
|
if (munmap(base, size) < 0) {
|
|
LOGE("Could not unmap %s", strerror(errno));
|
|
}
|
|
}
|
|
hnd->base = 0;
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
static pthread_mutex_t sMapLock = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
/*****************************************************************************/
|
|
|
|
int gralloc_register_buffer(gralloc_module_t const* module,
|
|
buffer_handle_t handle)
|
|
{
|
|
if (private_handle_t::validate(handle) < 0)
|
|
return -EINVAL;
|
|
|
|
// if this handle was created in this process, then we keep it as is.
|
|
int err = 0;
|
|
private_handle_t* hnd = (private_handle_t*)handle;
|
|
if (hnd->pid != getpid()) {
|
|
hnd->base = NULL;
|
|
if (!(hnd->flags & private_handle_t::PRIV_FLAGS_USES_GPU)) {
|
|
void *vaddr;
|
|
err = gralloc_map(module, handle, &vaddr);
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
int gralloc_unregister_buffer(gralloc_module_t const* module,
|
|
buffer_handle_t handle)
|
|
{
|
|
if (private_handle_t::validate(handle) < 0)
|
|
return -EINVAL;
|
|
|
|
// never unmap buffers that were created in this process
|
|
private_handle_t* hnd = (private_handle_t*)handle;
|
|
if (hnd->pid != getpid()) {
|
|
if (hnd->base) {
|
|
gralloc_unmap(module, handle);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int mapBuffer(gralloc_module_t const* module,
|
|
private_handle_t* hnd)
|
|
{
|
|
void* vaddr;
|
|
return gralloc_map(module, hnd, &vaddr);
|
|
}
|
|
|
|
int terminateBuffer(gralloc_module_t const* module,
|
|
private_handle_t* hnd)
|
|
{
|
|
if (hnd->base) {
|
|
// this buffer was mapped, unmap it now
|
|
if (hnd->flags & private_handle_t::PRIV_FLAGS_USES_PMEM) {
|
|
if (hnd->pid != getpid()) {
|
|
// ... unless it's a "master" pmem buffer, that is a buffer
|
|
// mapped in the process it's been allocated.
|
|
// (see gralloc_alloc_buffer())
|
|
gralloc_unmap(module, hnd);
|
|
}
|
|
} else if (hnd->flags & private_handle_t::PRIV_FLAGS_USES_GPU) {
|
|
// XXX: for now do nothing here
|
|
} else {
|
|
gralloc_unmap(module, hnd);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gralloc_lock(gralloc_module_t const* module,
|
|
buffer_handle_t handle, int usage,
|
|
int l, int t, int w, int h,
|
|
void** vaddr)
|
|
{
|
|
// this is called when a buffer is being locked for software
|
|
// access. in thin implementation we have nothing to do since
|
|
// not synchronization with the h/w is needed.
|
|
// typically this is used to wait for the h/w to finish with
|
|
// this buffer if relevant. the data cache may need to be
|
|
// flushed or invalidated depending on the usage bits and the
|
|
// hardware.
|
|
|
|
if (private_handle_t::validate(handle) < 0)
|
|
return -EINVAL;
|
|
|
|
private_handle_t* hnd = (private_handle_t*)handle;
|
|
*vaddr = (void*)hnd->base;
|
|
return 0;
|
|
}
|
|
|
|
int gralloc_unlock(gralloc_module_t const* module,
|
|
buffer_handle_t handle)
|
|
{
|
|
// we're done with a software buffer. nothing to do in this
|
|
// implementation. typically this is used to flush the data cache.
|
|
|
|
if (private_handle_t::validate(handle) < 0)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*****************************************************************************/
|
|
|
|
int gralloc_perform(struct gralloc_module_t const* module,
|
|
int operation, ... )
|
|
{
|
|
int res = -EINVAL;
|
|
va_list args;
|
|
va_start(args, operation);
|
|
|
|
switch (operation) {
|
|
case GRALLOC_MODULE_PERFORM_CREATE_HANDLE_FROM_BUFFER: {
|
|
int fd = va_arg(args, int);
|
|
size_t size = va_arg(args, size_t);
|
|
size_t offset = va_arg(args, size_t);
|
|
void* base = va_arg(args, void*);
|
|
|
|
// validate that it's indeed a pmem buffer
|
|
pmem_region region;
|
|
if (ioctl(fd, PMEM_GET_SIZE, ®ion) < 0) {
|
|
break;
|
|
}
|
|
|
|
native_handle_t** handle = va_arg(args, native_handle_t**);
|
|
private_handle_t* hnd = (private_handle_t*)native_handle_create(
|
|
private_handle_t::sNumFds, private_handle_t::sNumInts);
|
|
hnd->magic = private_handle_t::sMagic;
|
|
hnd->fd = fd;
|
|
hnd->flags = private_handle_t::PRIV_FLAGS_USES_PMEM;
|
|
hnd->size = size;
|
|
hnd->offset = offset;
|
|
hnd->base = intptr_t(base) + offset;
|
|
*handle = (native_handle_t *)hnd;
|
|
res = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
va_end(args);
|
|
return res;
|
|
}
|