213 lines
6.5 KiB
C++
213 lines
6.5 KiB
C++
/*
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** Copyright 2007, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#define LOG_TAG "EGL"
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#include <ctype.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#if HAVE_ANDROID_OS
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#include <linux/android_pmem.h>
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#endif
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#include <cutils/log.h>
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#include <cutils/properties.h>
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#include <utils/IMemory.h>
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#include <utils/threads.h>
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#include <utils/IServiceManager.h>
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#include <utils/IPCThreadState.h>
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#include <utils/Parcel.h>
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#include <ui/EGLDisplaySurface.h>
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#include <ui/ISurfaceComposer.h>
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#include "hooks.h"
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#include "egl_impl.h"
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// ----------------------------------------------------------------------------
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namespace android {
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// ----------------------------------------------------------------------------
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/*
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* we provide our own allocators for the GPU regions, these
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* allocators go through surfaceflinger
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*/
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static Mutex gRegionsLock;
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static request_gpu_t gRegions;
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static sp<ISurfaceComposer> gSurfaceManager;
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ISurfaceComposer* GLES_localSurfaceManager = 0;
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extern egl_connection_t gEGLImpl[2];
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const sp<ISurfaceComposer>& getSurfaceFlinger()
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{
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Mutex::Autolock _l(gRegionsLock);
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/*
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* There is a little bit of voodoo magic here. We want to access
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* surfaceflinger for allocating GPU regions, however, when we are
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* running as part of surfaceflinger, we want to bypass the
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* service manager because surfaceflinger might not be registered yet.
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* SurfaceFlinger will populate "GLES_localSurfaceManager" with its
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* own address, so we can just use that.
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*/
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if (gSurfaceManager == 0) {
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if (GLES_localSurfaceManager) {
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// we're running in SurfaceFlinger's context
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gSurfaceManager = GLES_localSurfaceManager;
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} else {
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// we're a remote process or not part of surfaceflinger,
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// go through the service manager
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sp<IServiceManager> sm = defaultServiceManager();
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if (sm != NULL) {
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sp<IBinder> binder = sm->getService(String16("SurfaceFlinger"));
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gSurfaceManager = interface_cast<ISurfaceComposer>(binder);
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}
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}
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}
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return gSurfaceManager;
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}
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class GPURevokeRequester : public BnGPUCallback
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{
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public:
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virtual void gpuLost() {
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LOGD("CONTEXT_LOST: Releasing GPU upon request from SurfaceFlinger.");
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gEGLImpl[IMPL_HARDWARE].hooks = &gHooks[IMPL_CONTEXT_LOST];
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}
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};
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static sp<GPURevokeRequester> gRevokerCallback;
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request_gpu_t* gpu_acquire(void* user)
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{
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sp<ISurfaceComposer> server( getSurfaceFlinger() );
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Mutex::Autolock _l(gRegionsLock);
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if (server == NULL) {
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return 0;
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}
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ISurfaceComposer::gpu_info_t info;
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if (gRevokerCallback == 0)
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gRevokerCallback = new GPURevokeRequester();
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status_t err = server->requestGPU(gRevokerCallback, &info);
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if (err != NO_ERROR) {
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LOGD("requestGPU returned %d", err);
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return 0;
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}
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bool failed = false;
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request_gpu_t* gpu = &gRegions;
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memset(gpu, 0, sizeof(*gpu));
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if (info.regs != 0) {
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sp<IMemoryHeap> heap(info.regs->getMemory());
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if (heap != 0) {
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int fd = heap->heapID();
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gpu->regs.fd = fd;
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gpu->regs.base = info.regs->pointer();
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gpu->regs.size = info.regs->size();
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gpu->regs.user = info.regs.get();
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#if HAVE_ANDROID_OS
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struct pmem_region region;
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if (ioctl(fd, PMEM_GET_PHYS, ®ion) >= 0)
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gpu->regs.phys = (void*)region.offset;
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#endif
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info.regs->incStrong(gpu);
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} else {
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LOGE("GPU register handle %p is invalid!", info.regs.get());
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failed = true;
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}
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}
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for (size_t i=0 ; i<info.count && !failed ; i++) {
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sp<IMemory>& region(info.regions[i].region);
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if (region != 0) {
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sp<IMemoryHeap> heap(region->getMemory());
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if (heap != 0) {
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const int fd = heap->heapID();
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gpu->gpu[i].fd = fd;
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gpu->gpu[i].base = region->pointer();
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gpu->gpu[i].size = region->size();
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gpu->gpu[i].user = region.get();
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gpu->gpu[i].offset = info.regions[i].reserved;
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#if HAVE_ANDROID_OS
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struct pmem_region reg;
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if (ioctl(fd, PMEM_GET_PHYS, ®) >= 0)
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gpu->gpu[i].phys = (void*)reg.offset;
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#endif
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region->incStrong(gpu);
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} else {
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LOGE("GPU region handle [%d, %p] is invalid!", i, region.get());
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failed = true;
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}
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}
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}
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if (failed) {
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// something went wrong, clean up everything!
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if (gpu->regs.user) {
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static_cast<IMemory*>(gpu->regs.user)->decStrong(gpu);
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for (size_t i=0 ; i<info.count ; i++) {
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if (gpu->gpu[i].user) {
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static_cast<IMemory*>(gpu->gpu[i].user)->decStrong(gpu);
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}
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}
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}
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}
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gpu->count = info.count;
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return gpu;
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}
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int gpu_release(void*, request_gpu_t* gpu)
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{
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sp<IMemory> regs;
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{ // scope for lock
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Mutex::Autolock _l(gRegionsLock);
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regs = static_cast<IMemory*>(gpu->regs.user);
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gpu->regs.user = 0;
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if (regs != 0) regs->decStrong(gpu);
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for (int i=0 ; i<gpu->count ; i++) {
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sp<IMemory> r(static_cast<IMemory*>(gpu->gpu[i].user));
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gpu->gpu[i].user = 0;
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if (r != 0) r->decStrong(gpu);
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}
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}
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// there is a special transaction to relinquish the GPU
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// (it will happen automatically anyway if we don't do this)
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Parcel data, reply;
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// NOTE: this transaction does not require an interface token
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regs->asBinder()->transact(1000, data, &reply);
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return 1;
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}
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// ----------------------------------------------------------------------------
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}; // namespace android
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// ----------------------------------------------------------------------------
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