586 lines
17 KiB
C++
586 lines
17 KiB
C++
/*
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* Copyright (C) 2008 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 "SurfaceFlinger"
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <math.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <cutils/log.h>
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#include <cutils/properties.h>
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#include <binder/IBinder.h>
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#include <binder/MemoryDealer.h>
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#include <binder/MemoryBase.h>
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#include <binder/MemoryHeapPmem.h>
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#include <binder/MemoryHeapBase.h>
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#include <binder/IPCThreadState.h>
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#include <utils/StopWatch.h>
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#include <ui/ISurfaceComposer.h>
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#include "VRamHeap.h"
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#include "GPUHardware.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 "GPUHardware/GPUHardware.h"
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/*
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* Manage the GPU. This implementation is very specific to the G1.
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* There are no abstraction here.
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*
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* All this code will soon go-away and be replaced by a new architecture
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* for managing graphics accelerators.
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*
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* In the meantime, it is conceptually possible to instantiate a
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* GPUHardwareInterface for another GPU (see GPUFactory at the bottom
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* of this file); practically... doubtful.
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*
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*/
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namespace android {
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// ---------------------------------------------------------------------------
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class GPUClientHeap;
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class GPUAreaHeap;
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class GPUHardware : public GPUHardwareInterface, public IBinder::DeathRecipient
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{
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public:
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static const int GPU_RESERVED_SIZE;
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static const int GPUR_SIZE;
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GPUHardware();
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virtual ~GPUHardware();
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virtual void revoke(int pid);
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virtual sp<MemoryDealer> request(int pid);
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virtual status_t request(int pid,
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const sp<IGPUCallback>& callback,
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ISurfaceComposer::gpu_info_t* gpu);
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virtual status_t friendlyRevoke();
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virtual void unconditionalRevoke();
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virtual pid_t getOwner() const { return mOwner; }
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// used for debugging only...
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virtual sp<SimpleBestFitAllocator> getAllocator() const;
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private:
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enum {
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NO_OWNER = -1,
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};
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struct GPUArea {
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sp<GPUAreaHeap> heap;
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sp<MemoryHeapPmem> clientHeap;
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sp<IMemory> map();
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};
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struct Client {
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pid_t pid;
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GPUArea smi;
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GPUArea ebi;
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GPUArea reg;
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void createClientHeaps();
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void revokeAllHeaps();
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};
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Client& getClientLocked(pid_t pid);
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status_t requestLocked(int pid);
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void releaseLocked();
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void takeBackGPULocked();
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void registerCallbackLocked(const sp<IGPUCallback>& callback,
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Client& client);
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virtual void binderDied(const wp<IBinder>& who);
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mutable Mutex mLock;
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sp<GPUAreaHeap> mSMIHeap;
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sp<GPUAreaHeap> mEBIHeap;
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sp<GPUAreaHeap> mREGHeap;
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KeyedVector<pid_t, Client> mClients;
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DefaultKeyedVector< wp<IBinder>, pid_t > mRegisteredClients;
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pid_t mOwner;
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sp<MemoryDealer> mCurrentAllocator;
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sp<IGPUCallback> mCallback;
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sp<SimpleBestFitAllocator> mAllocator;
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Condition mCondition;
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};
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// size reserved for GPU surfaces
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// 1200 KB fits exactly:
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// - two 320*480 16-bits double-buffered surfaces
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// - one 320*480 32-bits double-buffered surface
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// - one 320*240 16-bits double-buffered, 4x anti-aliased surface
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const int GPUHardware::GPU_RESERVED_SIZE = 1200 * 1024;
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const int GPUHardware::GPUR_SIZE = 1 * 1024 * 1024;
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// ---------------------------------------------------------------------------
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/*
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* GPUHandle is a special IMemory given to the client. It represents their
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* handle to the GPU. Once they give it up, they loose GPU access, or if
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* they explicitly revoke their access through the binder code 1000.
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* In both cases, this triggers a callback to revoke()
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* first, and then actually powers down the chip.
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*
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* In the case of a misbehaving app, GPUHardware can ask for an immediate
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* release of the GPU to the target process which should answer by calling
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* code 1000 on GPUHandle. If it doesn't in a timely manner, the GPU will
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* be revoked from under their feet.
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*
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* We should never hold a strong reference on GPUHandle. In practice this
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* shouldn't be a big issue though because clients should use code 1000 and
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* not rely on the dtor being called.
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*
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*/
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class GPUClientHeap : public MemoryHeapPmem
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{
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public:
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GPUClientHeap(const wp<GPUHardware>& gpu,
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const sp<MemoryHeapBase>& heap)
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: MemoryHeapPmem(heap), mGPU(gpu) { }
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protected:
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wp<GPUHardware> mGPU;
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};
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class GPUAreaHeap : public MemoryHeapBase
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{
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public:
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GPUAreaHeap(const wp<GPUHardware>& gpu,
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const char* const vram, size_t size=0, size_t reserved=0)
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: MemoryHeapBase(vram, size), mGPU(gpu) {
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if (base() != MAP_FAILED) {
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if (reserved == 0)
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reserved = virtualSize();
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mAllocator = new SimpleBestFitAllocator(reserved);
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}
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}
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virtual sp<MemoryHeapPmem> createClientHeap() {
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sp<MemoryHeapBase> parentHeap(this);
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return new GPUClientHeap(mGPU, parentHeap);
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}
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virtual const sp<SimpleBestFitAllocator>& getAllocator() const {
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return mAllocator;
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}
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private:
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sp<SimpleBestFitAllocator> mAllocator;
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protected:
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wp<GPUHardware> mGPU;
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};
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class GPURegisterHeap : public GPUAreaHeap
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{
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public:
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GPURegisterHeap(const sp<GPUHardware>& gpu)
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: GPUAreaHeap(gpu, "/dev/hw3d", GPUHardware::GPUR_SIZE) { }
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virtual sp<MemoryHeapPmem> createClientHeap() {
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sp<MemoryHeapBase> parentHeap(this);
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return new MemoryHeapRegs(mGPU, parentHeap);
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}
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private:
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class MemoryHeapRegs : public GPUClientHeap {
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public:
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MemoryHeapRegs(const wp<GPUHardware>& gpu,
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const sp<MemoryHeapBase>& heap)
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: GPUClientHeap(gpu, heap) { }
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sp<MemoryHeapPmem::MemoryPmem> createMemory(size_t offset, size_t size);
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virtual void revoke();
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private:
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class GPUHandle : public MemoryHeapPmem::MemoryPmem {
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public:
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GPUHandle(const sp<GPUHardware>& gpu,
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const sp<MemoryHeapPmem>& heap)
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: MemoryHeapPmem::MemoryPmem(heap),
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mGPU(gpu), mOwner(gpu->getOwner()) { }
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virtual ~GPUHandle();
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virtual sp<IMemoryHeap> getMemory(
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ssize_t* offset, size_t* size) const;
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virtual void revoke() { };
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virtual status_t onTransact(
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uint32_t code, const Parcel& data,
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Parcel* reply, uint32_t flags);
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private:
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void revokeNotification();
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wp<GPUHardware> mGPU;
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pid_t mOwner;
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};
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};
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};
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GPURegisterHeap::MemoryHeapRegs::GPUHandle::~GPUHandle() {
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//LOGD("GPUHandle %p released, revoking GPU", this);
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revokeNotification();
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}
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void GPURegisterHeap::MemoryHeapRegs::GPUHandle::revokeNotification() {
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sp<GPUHardware> hw(mGPU.promote());
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if (hw != 0) {
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hw->revoke(mOwner);
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}
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}
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sp<IMemoryHeap> GPURegisterHeap::MemoryHeapRegs::GPUHandle::getMemory(
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ssize_t* offset, size_t* size) const
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{
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sp<MemoryHeapPmem> heap = getHeap();
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if (offset) *offset = 0;
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if (size) *size = heap !=0 ? heap->virtualSize() : 0;
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return heap;
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}
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status_t GPURegisterHeap::MemoryHeapRegs::GPUHandle::onTransact(
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uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
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{
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status_t err = BnMemory::onTransact(code, data, reply, flags);
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if (err == UNKNOWN_TRANSACTION && code == 1000) {
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int callingPid = IPCThreadState::self()->getCallingPid();
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//LOGD("pid %d voluntarily revoking gpu", callingPid);
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if (callingPid == mOwner) {
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revokeNotification();
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// we've revoked the GPU, don't do it again later when we
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// are destroyed.
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mGPU.clear();
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} else {
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LOGW("%d revoking someone else's gpu? (owner=%d)",
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callingPid, mOwner);
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}
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err = NO_ERROR;
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}
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return err;
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}
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// ---------------------------------------------------------------------------
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sp<MemoryHeapPmem::MemoryPmem> GPURegisterHeap::MemoryHeapRegs::createMemory(
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size_t offset, size_t size)
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{
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sp<GPUHandle> memory;
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sp<GPUHardware> gpu = mGPU.promote();
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if (heapID()>0 && gpu!=0) {
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#if HAVE_ANDROID_OS
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/* this is where the GPU is powered on and the registers are mapped
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* in the client */
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//LOGD("ioctl(HW3D_GRANT_GPU)");
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int err = ioctl(heapID(), HW3D_GRANT_GPU, base());
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if (err) {
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// it can happen if the master heap has been closed already
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// in which case the GPU already is revoked (app crash for
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// instance).
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LOGW("HW3D_GRANT_GPU failed (%s), mFD=%d, base=%p",
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strerror(errno), heapID(), base());
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}
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memory = new GPUHandle(gpu, this);
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#endif
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}
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return memory;
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}
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void GPURegisterHeap::MemoryHeapRegs::revoke()
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{
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MemoryHeapPmem::revoke();
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#if HAVE_ANDROID_OS
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if (heapID() > 0) {
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//LOGD("ioctl(HW3D_REVOKE_GPU)");
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int err = ioctl(heapID(), HW3D_REVOKE_GPU, base());
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LOGE_IF(err, "HW3D_REVOKE_GPU failed (%s), mFD=%d, base=%p",
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strerror(errno), heapID(), base());
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}
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#endif
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}
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/*****************************************************************************/
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GPUHardware::GPUHardware()
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: mOwner(NO_OWNER)
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{
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}
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GPUHardware::~GPUHardware()
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{
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}
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status_t GPUHardware::requestLocked(int pid)
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{
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const int self_pid = getpid();
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if (pid == self_pid) {
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// can't use GPU from surfaceflinger's process
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return PERMISSION_DENIED;
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}
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if (mOwner != pid) {
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if (mREGHeap != 0) {
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if (mOwner != NO_OWNER) {
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// someone already has the gpu.
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takeBackGPULocked();
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releaseLocked();
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}
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} else {
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// first time, initialize the stuff.
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if (mSMIHeap == 0)
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mSMIHeap = new GPUAreaHeap(this, "/dev/pmem_gpu0");
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if (mEBIHeap == 0)
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mEBIHeap = new GPUAreaHeap(this,
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"/dev/pmem_gpu1", 0, GPU_RESERVED_SIZE);
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mREGHeap = new GPURegisterHeap(this);
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mAllocator = mEBIHeap->getAllocator();
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if (mAllocator == NULL) {
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// something went terribly wrong.
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mSMIHeap.clear();
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mEBIHeap.clear();
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mREGHeap.clear();
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return INVALID_OPERATION;
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}
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}
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Client& client = getClientLocked(pid);
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mCurrentAllocator = new MemoryDealer(client.ebi.clientHeap, mAllocator);
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mOwner = pid;
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}
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return NO_ERROR;
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}
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sp<MemoryDealer> GPUHardware::request(int pid)
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{
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sp<MemoryDealer> dealer;
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Mutex::Autolock _l(mLock);
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Client* client;
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LOGD("pid %d requesting gpu surface (current owner = %d)", pid, mOwner);
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if (requestLocked(pid) == NO_ERROR) {
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dealer = mCurrentAllocator;
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LOGD_IF(dealer!=0, "gpu surface granted to pid %d", mOwner);
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}
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return dealer;
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}
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status_t GPUHardware::request(int pid, const sp<IGPUCallback>& callback,
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ISurfaceComposer::gpu_info_t* gpu)
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{
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if (callback == 0)
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return BAD_VALUE;
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sp<IMemory> gpuHandle;
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LOGD("pid %d requesting gpu core (owner = %d)", pid, mOwner);
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Mutex::Autolock _l(mLock);
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status_t err = requestLocked(pid);
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if (err == NO_ERROR) {
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// it's guaranteed to be there, be construction
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Client& client = mClients.editValueFor(pid);
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registerCallbackLocked(callback, client);
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gpu->count = 2;
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gpu->regions[0].region = client.smi.map();
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gpu->regions[1].region = client.ebi.map();
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gpu->regs = client.reg.map();
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gpu->regions[0].reserved = 0;
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gpu->regions[1].reserved = GPU_RESERVED_SIZE;
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if (gpu->regs != 0) {
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//LOGD("gpu core granted to pid %d, handle base=%p",
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// mOwner, gpu->regs->pointer());
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}
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mCallback = callback;
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} else {
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LOGW("couldn't grant gpu core to pid %d", pid);
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}
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return err;
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}
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void GPUHardware::revoke(int pid)
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{
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Mutex::Autolock _l(mLock);
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if (mOwner > 0) {
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if (pid != mOwner) {
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LOGW("GPU owned by %d, revoke from %d", mOwner, pid);
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return;
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}
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//LOGD("revoke pid=%d, owner=%d", pid, mOwner);
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// mOwner could be <0 if the same process acquired the GPU
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// several times without releasing it first.
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mCondition.signal();
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releaseLocked();
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}
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}
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status_t GPUHardware::friendlyRevoke()
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{
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Mutex::Autolock _l(mLock);
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//LOGD("friendlyRevoke owner=%d", mOwner);
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takeBackGPULocked();
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releaseLocked();
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return NO_ERROR;
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}
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void GPUHardware::takeBackGPULocked()
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{
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sp<IGPUCallback> callback = mCallback;
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mCallback.clear();
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if (callback != 0) {
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callback->gpuLost(); // one-way
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mCondition.waitRelative(mLock, ms2ns(250));
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}
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}
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void GPUHardware::releaseLocked()
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{
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//LOGD("revoking gpu from pid %d", mOwner);
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if (mOwner != NO_OWNER) {
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// this may fail because the client might have died, and have
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// been removed from the list.
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ssize_t index = mClients.indexOfKey(mOwner);
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if (index >= 0) {
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Client& client(mClients.editValueAt(index));
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client.revokeAllHeaps();
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}
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mOwner = NO_OWNER;
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mCurrentAllocator.clear();
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mCallback.clear();
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}
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}
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GPUHardware::Client& GPUHardware::getClientLocked(pid_t pid)
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{
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ssize_t index = mClients.indexOfKey(pid);
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if (index < 0) {
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Client client;
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client.pid = pid;
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client.smi.heap = mSMIHeap;
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client.ebi.heap = mEBIHeap;
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client.reg.heap = mREGHeap;
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index = mClients.add(pid, client);
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}
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Client& client(mClients.editValueAt(index));
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client.createClientHeaps();
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return client;
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}
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// ----------------------------------------------------------------------------
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// for debugging / testing ...
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sp<SimpleBestFitAllocator> GPUHardware::getAllocator() const {
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Mutex::Autolock _l(mLock);
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return mAllocator;
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}
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void GPUHardware::unconditionalRevoke()
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{
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Mutex::Autolock _l(mLock);
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releaseLocked();
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}
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// ---------------------------------------------------------------------------
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sp<IMemory> GPUHardware::GPUArea::map() {
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sp<IMemory> memory;
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if (clientHeap != 0 && heap != 0) {
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memory = clientHeap->mapMemory(0, heap->virtualSize());
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}
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return memory;
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}
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void GPUHardware::Client::createClientHeaps()
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{
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if (smi.clientHeap == 0)
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smi.clientHeap = smi.heap->createClientHeap();
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if (ebi.clientHeap == 0)
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ebi.clientHeap = ebi.heap->createClientHeap();
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if (reg.clientHeap == 0)
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reg.clientHeap = reg.heap->createClientHeap();
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}
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void GPUHardware::Client::revokeAllHeaps()
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{
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if (smi.clientHeap != 0)
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smi.clientHeap->revoke();
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if (ebi.clientHeap != 0)
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ebi.clientHeap->revoke();
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if (reg.clientHeap != 0)
|
|
reg.clientHeap->revoke();
|
|
}
|
|
|
|
void GPUHardware::registerCallbackLocked(const sp<IGPUCallback>& callback,
|
|
Client& client)
|
|
{
|
|
sp<IBinder> binder = callback->asBinder();
|
|
if (mRegisteredClients.add(binder, client.pid) >= 0) {
|
|
binder->linkToDeath(this);
|
|
}
|
|
}
|
|
|
|
void GPUHardware::binderDied(const wp<IBinder>& who)
|
|
{
|
|
Mutex::Autolock _l(mLock);
|
|
pid_t pid = mRegisteredClients.valueFor(who);
|
|
if (pid != 0) {
|
|
ssize_t index = mClients.indexOfKey(pid);
|
|
if (index >= 0) {
|
|
//LOGD("*** removing client at %d", index);
|
|
Client& client(mClients.editValueAt(index));
|
|
client.revokeAllHeaps(); // not really needed in theory
|
|
mClients.removeItemsAt(index);
|
|
if (mClients.size() == 0) {
|
|
//LOGD("*** was last client closing everything");
|
|
mCallback.clear();
|
|
mAllocator.clear();
|
|
mCurrentAllocator.clear();
|
|
mSMIHeap.clear();
|
|
mREGHeap.clear();
|
|
|
|
// NOTE: we cannot clear the EBI heap because surfaceflinger
|
|
// itself may be using it, since this is where surfaces
|
|
// are allocated. if we're in the middle of compositing
|
|
// a surface (even if its process just died), we cannot
|
|
// rip the heap under our feet.
|
|
|
|
mOwner = NO_OWNER;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
sp<GPUHardwareInterface> GPUFactory::getGPU()
|
|
{
|
|
sp<GPUHardwareInterface> gpu;
|
|
if (access("/dev/hw3d", F_OK) == 0) {
|
|
gpu = new GPUHardware();
|
|
}
|
|
return gpu;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
}; // namespace android
|
|
|