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/*
** Copyright 2007, 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.
*/
#define LOG_TAG "EGL"
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#if HAVE_ANDROID_OS
#include <linux/android_pmem.h>
#endif
#include <cutils/log.h>
#include <cutils/properties.h>
#include <binder/IMemory.h>
#include <utils/threads.h>
#include <binder/IServiceManager.h>
#include <binder/IPCThreadState.h>
#include <binder/Parcel.h>
#include <ui/EGLDisplaySurface.h>
#include <ui/ISurfaceComposer.h>
#include "hooks.h"
#include "egl_impl.h"
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
/*
* we provide our own allocators for the GPU regions, these
* allocators go through surfaceflinger
*/
static Mutex gRegionsLock;
static request_gpu_t gRegions;
static sp<ISurfaceComposer> gSurfaceManager;
GL_API ISurfaceComposer* GLES_localSurfaceManager = 0;
extern egl_connection_t gEGLImpl[2];
const sp<ISurfaceComposer>& getSurfaceFlinger()
{
Mutex::Autolock _l(gRegionsLock);
/*
* There is a little bit of voodoo magic here. We want to access
* surfaceflinger for allocating GPU regions, however, when we are
* running as part of surfaceflinger, we want to bypass the
* service manager because surfaceflinger might not be registered yet.
* SurfaceFlinger will populate "GLES_localSurfaceManager" with its
* own address, so we can just use that.
*/
if (gSurfaceManager == 0) {
if (GLES_localSurfaceManager) {
// we're running in SurfaceFlinger's context
gSurfaceManager = GLES_localSurfaceManager;
} else {
// we're a remote process or not part of surfaceflinger,
// go through the service manager
sp<IServiceManager> sm = defaultServiceManager();
if (sm != NULL) {
sp<IBinder> binder = sm->getService(String16("SurfaceFlinger"));
gSurfaceManager = interface_cast<ISurfaceComposer>(binder);
}
}
}
return gSurfaceManager;
}
class GPURevokeRequester : public BnGPUCallback
{
public:
virtual void gpuLost() {
LOGD("CONTEXT_LOST: Releasing GPU upon request from SurfaceFlinger.");
gEGLImpl[IMPL_HARDWARE].hooks = &gHooks[IMPL_CONTEXT_LOST];
}
};
static sp<GPURevokeRequester> gRevokerCallback;
request_gpu_t* gpu_acquire(void* user)
{
sp<ISurfaceComposer> server( getSurfaceFlinger() );
Mutex::Autolock _l(gRegionsLock);
if (server == NULL) {
return 0;
}
ISurfaceComposer::gpu_info_t info;
if (gRevokerCallback == 0)
gRevokerCallback = new GPURevokeRequester();
status_t err = server->requestGPU(gRevokerCallback, &info);
if (err != NO_ERROR) {
LOGD("requestGPU returned %d", err);
return 0;
}
if (info.regs == 0) {
LOGD("requestGPU() failed");
return 0;
}
bool failed = false;
request_gpu_t* gpu = &gRegions;
memset(gpu, 0, sizeof(*gpu));
if (info.regs != 0) {
sp<IMemoryHeap> heap(info.regs->getMemory());
if (heap != 0) {
int fd = heap->heapID();
gpu->regs.fd = fd;
gpu->regs.base = info.regs->pointer();
gpu->regs.size = info.regs->size();
gpu->regs.user = info.regs.get();
#if HAVE_ANDROID_OS
struct pmem_region region;
if (ioctl(fd, PMEM_GET_PHYS, ®ion) >= 0)
gpu->regs.phys = (void*)region.offset;
#endif
info.regs->incStrong(gpu);
} else {
LOGE("GPU register handle %p is invalid!", info.regs.get());
failed = true;
}
}
for (size_t i=0 ; i<info.count && !failed ; i++) {
sp<IMemory>& region(info.regions[i].region);
if (region != 0) {
sp<IMemoryHeap> heap(region->getMemory());
if (heap != 0) {
const int fd = heap->heapID();
gpu->gpu[i].fd = fd;
gpu->gpu[i].base = region->pointer();
gpu->gpu[i].size = region->size();
gpu->gpu[i].user = region.get();
gpu->gpu[i].offset = info.regions[i].reserved;
#if HAVE_ANDROID_OS
struct pmem_region reg;
if (ioctl(fd, PMEM_GET_PHYS, ®) >= 0)
gpu->gpu[i].phys = (void*)reg.offset;
#endif
region->incStrong(gpu);
} else {
LOGE("GPU region handle [%d, %p] is invalid!", i, region.get());
failed = true;
}
}
}
if (failed) {
// something went wrong, clean up everything!
if (gpu->regs.user) {
static_cast<IMemory*>(gpu->regs.user)->decStrong(gpu);
for (size_t i=0 ; i<info.count ; i++) {
if (gpu->gpu[i].user) {
static_cast<IMemory*>(gpu->gpu[i].user)->decStrong(gpu);
}
}
}
}
gpu->count = info.count;
return gpu;
}
int gpu_release(void*, request_gpu_t* gpu)
{
sp<IMemory> regs;
{ // scope for lock
Mutex::Autolock _l(gRegionsLock);
regs = static_cast<IMemory*>(gpu->regs.user);
gpu->regs.user = 0;
if (regs != 0) regs->decStrong(gpu);
for (int i=0 ; i<gpu->count ; i++) {
sp<IMemory> r(static_cast<IMemory*>(gpu->gpu[i].user));
gpu->gpu[i].user = 0;
if (r != 0) r->decStrong(gpu);
}
}
// there is a special transaction to relinquish the GPU
// (it will happen automatically anyway if we don't do this)
Parcel data, reply;
// NOTE: this transaction does not require an interface token
regs->asBinder()->transact(1000, data, &reply);
return 1;
}
// ----------------------------------------------------------------------------
}; // namespace android
// ----------------------------------------------------------------------------
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