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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_IPC_SERVICE_GPU_CHANNEL_H_
#define GPU_IPC_SERVICE_GPU_CHANNEL_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <string>
#include "base/containers/hash_tables.h"
#include "base/containers/scoped_ptr_hash_map.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/process/process.h"
#include "base/threading/thread_checker.h"
#include "base/trace_event/memory_dump_provider.h"
#include "build/build_config.h"
#include "gpu/gpu_export.h"
#include "gpu/ipc/common/gpu_stream_constants.h"
#include "gpu/ipc/service/gpu_command_buffer_stub.h"
#include "gpu/ipc/service/gpu_memory_manager.h"
#include "ipc/ipc_sync_channel.h"
#include "ipc/message_router.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gl/gl_share_group.h"
#include "ui/gl/gpu_preference.h"
struct GPUCreateCommandBufferConfig;
namespace base {
class WaitableEvent;
}
namespace IPC {
class MessageFilter;
}
namespace gpu {
class PreemptionFlag;
class SyncPointOrderData;
class SyncPointManager;
class GpuChannelManager;
class GpuChannelMessageFilter;
class GpuChannelMessageQueue;
class GpuWatchdog;
// Encapsulates an IPC channel between the GPU process and one renderer
// process. On the renderer side there's a corresponding GpuChannelHost.
class GPU_EXPORT GpuChannel
: public IPC::Listener,
public IPC::Sender {
public:
// Takes ownership of the renderer process handle.
GpuChannel(GpuChannelManager* gpu_channel_manager,
SyncPointManager* sync_point_manager,
GpuWatchdog* watchdog,
gfx::GLShareGroup* share_group,
gles2::MailboxManager* mailbox_manager,
PreemptionFlag* preempting_flag,
PreemptionFlag* preempted_flag,
base::SingleThreadTaskRunner* task_runner,
base::SingleThreadTaskRunner* io_task_runner,
int32_t client_id,
uint64_t client_tracing_id,
bool allow_view_command_buffers,
bool allow_real_time_streams);
~GpuChannel() override;
// Initializes the IPC channel. Caller takes ownership of the client FD in
// the returned handle and is responsible for closing it.
virtual IPC::ChannelHandle Init(base::WaitableEvent* shutdown_event);
void SetUnhandledMessageListener(IPC::Listener* listener);
// Get the GpuChannelManager that owns this channel.
GpuChannelManager* gpu_channel_manager() const {
return gpu_channel_manager_;
}
const std::string& channel_id() const { return channel_id_; }
virtual base::ProcessId GetClientPID() const;
int client_id() const { return client_id_; }
uint64_t client_tracing_id() const { return client_tracing_id_; }
base::WeakPtr<GpuChannel> AsWeakPtr();
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner() const {
return io_task_runner_;
}
// IPC::Listener implementation:
bool OnMessageReceived(const IPC::Message& msg) override;
void OnChannelError() override;
// IPC::Sender implementation:
bool Send(IPC::Message* msg) override;
void OnStreamRescheduled(int32_t stream_id, bool scheduled);
gfx::GLShareGroup* share_group() const { return share_group_.get(); }
GpuCommandBufferStub* LookupCommandBuffer(int32_t route_id);
void LoseAllContexts();
void MarkAllContextsLost();
// Called to add a listener for a particular message routing ID.
// Returns true if succeeded.
bool AddRoute(int32_t route_id, int32_t stream_id, IPC::Listener* listener);
// Called to remove a listener for a particular message routing ID.
void RemoveRoute(int32_t route_id);
void CacheShader(const std::string& key, const std::string& shader);
void AddFilter(IPC::MessageFilter* filter);
void RemoveFilter(IPC::MessageFilter* filter);
uint64_t GetMemoryUsage();
scoped_refptr<gl::GLImage> CreateImageForGpuMemoryBuffer(
const gfx::GpuMemoryBufferHandle& handle,
const gfx::Size& size,
gfx::BufferFormat format,
uint32_t internalformat);
GpuChannelMessageFilter* filter() const { return filter_.get(); }
// Returns the global order number for the last processed IPC message.
uint32_t GetProcessedOrderNum() const;
// Returns the global order number for the last unprocessed IPC message.
uint32_t GetUnprocessedOrderNum() const;
// Returns the shared sync point global order data for the stream.
scoped_refptr<SyncPointOrderData> GetSyncPointOrderData(
int32_t stream_id);
void PostHandleOutOfOrderMessage(const IPC::Message& message);
void PostHandleMessage(const scoped_refptr<GpuChannelMessageQueue>& queue);
// Synchronously handle the message to make testing convenient.
void HandleMessageForTesting(const IPC::Message& msg);
#if defined(OS_ANDROID)
const GpuCommandBufferStub* GetOneStub() const;
#endif
protected:
// The message filter on the io thread.
scoped_refptr<GpuChannelMessageFilter> filter_;
// Map of routing id to command buffer stub.
base::ScopedPtrHashMap<int32_t, std::unique_ptr<GpuCommandBufferStub>> stubs_;
private:
bool OnControlMessageReceived(const IPC::Message& msg);
void HandleMessage(const scoped_refptr<GpuChannelMessageQueue>& queue);
// Some messages such as WaitForGetOffsetInRange and WaitForTokenInRange are
// processed as soon as possible because the client is blocked until they
// are completed.
void HandleOutOfOrderMessage(const IPC::Message& msg);
void HandleMessageHelper(const IPC::Message& msg);
scoped_refptr<GpuChannelMessageQueue> CreateStream(
int32_t stream_id,
GpuStreamPriority stream_priority);
scoped_refptr<GpuChannelMessageQueue> LookupStream(int32_t stream_id);
void DestroyStreamIfNecessary(
const scoped_refptr<GpuChannelMessageQueue>& queue);
void AddRouteToStream(int32_t route_id, int32_t stream_id);
void RemoveRouteFromStream(int32_t route_id);
// Message handlers for control messages.
void OnCreateCommandBuffer(SurfaceHandle surface_handle,
const gfx::Size& size,
const GPUCreateCommandBufferConfig& init_params,
int32_t route_id,
bool* succeeded);
void OnDestroyCommandBuffer(int32_t route_id);
void OnGetDriverBugWorkArounds(
std::vector<std::string>* gpu_driver_bug_workarounds);
// The lifetime of objects of this class is managed by a GpuChannelManager.
// The GpuChannelManager destroy all the GpuChannels that they own when they
// are destroyed. So a raw pointer is safe.
GpuChannelManager* const gpu_channel_manager_;
// Sync point manager. Outlives the channel and is guaranteed to outlive the
// message loop.
SyncPointManager* const sync_point_manager_;
std::unique_ptr<IPC::SyncChannel> channel_;
IPC::Listener* unhandled_message_listener_;
// Uniquely identifies the channel within this GPU process.
std::string channel_id_;
// Used to implement message routing functionality to CommandBuffer objects
IPC::MessageRouter router_;
// Whether the processing of IPCs on this channel is stalled and we should
// preempt other GpuChannels.
scoped_refptr<PreemptionFlag> preempting_flag_;
// If non-NULL, all stubs on this channel should stop processing GL
// commands (via their CommandExecutor) when preempted_flag_->IsSet()
scoped_refptr<PreemptionFlag> preempted_flag_;
// The id of the client who is on the other side of the channel.
const int32_t client_id_;
// The tracing ID used for memory allocations associated with this client.
const uint64_t client_tracing_id_;
// The task runners for the main thread and the io thread.
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
// The share group that all contexts associated with a particular renderer
// process use.
scoped_refptr<gfx::GLShareGroup> share_group_;
scoped_refptr<gles2::MailboxManager> mailbox_manager_;
gles2::DisallowedFeatures disallowed_features_;
GpuWatchdog* const watchdog_;
// Map of stream id to appropriate message queue.
base::hash_map<int32_t, scoped_refptr<GpuChannelMessageQueue>> streams_;
// Multimap of stream id to route ids.
base::hash_map<int32_t, int> streams_to_num_routes_;
// Map of route id to stream id;
base::hash_map<int32_t, int32_t> routes_to_streams_;
// Can view command buffers be created on this channel.
const bool allow_view_command_buffers_;
// Can real time streams be created on this channel.
const bool allow_real_time_streams_;
// Member variables should appear before the WeakPtrFactory, to ensure
// that any WeakPtrs to Controller are invalidated before its members
// variable's destructors are executed, rendering them invalid.
base::WeakPtrFactory<GpuChannel> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(GpuChannel);
};
// This filter does three things:
// - it counts and timestamps each message forwarded to the channel
// so that we can preempt other channels if a message takes too long to
// process. To guarantee fairness, we must wait a minimum amount of time
// before preempting and we limit the amount of time that we can preempt in
// one shot (see constants above).
// - it handles the GpuCommandBufferMsg_InsertSyncPoint message on the IO
// thread, generating the sync point ID and responding immediately, and then
// posting a task to insert the GpuCommandBufferMsg_RetireSyncPoint message
// into the channel's queue.
// - it generates mailbox names for clients of the GPU process on the IO thread.
class GPU_EXPORT GpuChannelMessageFilter : public IPC::MessageFilter {
public:
GpuChannelMessageFilter();
// IPC::MessageFilter implementation.
void OnFilterAdded(IPC::Sender* sender) override;
void OnFilterRemoved() override;
void OnChannelConnected(int32_t peer_pid) override;
void OnChannelError() override;
void OnChannelClosing() override;
bool OnMessageReceived(const IPC::Message& message) override;
void AddChannelFilter(scoped_refptr<IPC::MessageFilter> filter);
void RemoveChannelFilter(scoped_refptr<IPC::MessageFilter> filter);
void AddRoute(int32_t route_id,
const scoped_refptr<GpuChannelMessageQueue>& queue);
void RemoveRoute(int32_t route_id);
bool Send(IPC::Message* message);
protected:
~GpuChannelMessageFilter() override;
private:
scoped_refptr<GpuChannelMessageQueue> LookupStreamByRoute(int32_t route_id);
bool MessageErrorHandler(const IPC::Message& message, const char* error_msg);
// Map of route id to message queue.
base::hash_map<int32_t, scoped_refptr<GpuChannelMessageQueue>> routes_;
base::Lock routes_lock_; // Protects |routes_|.
IPC::Sender* sender_;
base::ProcessId peer_pid_;
std::vector<scoped_refptr<IPC::MessageFilter>> channel_filters_;
DISALLOW_COPY_AND_ASSIGN(GpuChannelMessageFilter);
};
struct GpuChannelMessage {
IPC::Message message;
uint32_t order_number;
base::TimeTicks time_received;
GpuChannelMessage(const IPC::Message& msg,
uint32_t order_num,
base::TimeTicks ts)
: message(msg), order_number(order_num), time_received(ts) {}
private:
DISALLOW_COPY_AND_ASSIGN(GpuChannelMessage);
};
class GpuChannelMessageQueue
: public base::RefCountedThreadSafe<GpuChannelMessageQueue> {
public:
static scoped_refptr<GpuChannelMessageQueue> Create(
int32_t stream_id,
GpuStreamPriority stream_priority,
GpuChannel* channel,
const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
const scoped_refptr<PreemptionFlag>& preempting_flag,
const scoped_refptr<PreemptionFlag>& preempted_flag,
SyncPointManager* sync_point_manager);
void Disable();
void DisableIO();
int32_t stream_id() const { return stream_id_; }
GpuStreamPriority stream_priority() const { return stream_priority_; }
bool IsScheduled() const;
void OnRescheduled(bool scheduled);
bool HasQueuedMessages() const;
base::TimeTicks GetNextMessageTimeTick() const;
scoped_refptr<SyncPointOrderData> GetSyncPointOrderData();
// Returns the global order number for the last unprocessed IPC message.
uint32_t GetUnprocessedOrderNum() const;
// Returns the global order number for the last unprocessed IPC message.
uint32_t GetProcessedOrderNum() const;
// Should be called before a message begins to be processed. Returns false if
// there are no messages to process.
const GpuChannelMessage* BeginMessageProcessing();
// Should be called if a message began processing but did not finish.
void PauseMessageProcessing();
// Should be called if a message is completely processed. Returns true if
// there are more messages to process.
void FinishMessageProcessing();
bool PushBackMessage(const IPC::Message& message);
private:
enum PreemptionState {
// Either there's no other channel to preempt, there are no messages
// pending processing, or we just finished preempting and have to wait
// before preempting again.
IDLE,
// We are waiting kPreemptWaitTimeMs before checking if we should preempt.
WAITING,
// We can preempt whenever any IPC processing takes more than
// kPreemptWaitTimeMs.
CHECKING,
// We are currently preempting (i.e. no stub is descheduled).
PREEMPTING,
// We would like to preempt, but some stub is descheduled.
WOULD_PREEMPT_DESCHEDULED,
};
friend class base::RefCountedThreadSafe<GpuChannelMessageQueue>;
GpuChannelMessageQueue(
int32_t stream_id,
GpuStreamPriority stream_priority,
GpuChannel* channel,
const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
const scoped_refptr<PreemptionFlag>& preempting_flag,
const scoped_refptr<PreemptionFlag>& preempted_flag,
SyncPointManager* sync_point_manager);
~GpuChannelMessageQueue();
void UpdatePreemptionState();
void UpdatePreemptionStateHelper();
void UpdateStateIdle();
void UpdateStateWaiting();
void UpdateStateChecking();
void UpdateStatePreempting();
void UpdateStateWouldPreemptDescheduled();
void TransitionToIdle();
void TransitionToWaiting();
void TransitionToChecking();
void TransitionToPreempting();
void TransitionToWouldPreemptDescheduled();
bool ShouldTransitionToIdle() const;
const int32_t stream_id_;
const GpuStreamPriority stream_priority_;
// These can be accessed from both IO and main threads and are protected by
// |channel_lock_|.
bool enabled_;
bool scheduled_;
GpuChannel* const channel_;
std::deque<std::unique_ptr<GpuChannelMessage>> channel_messages_;
mutable base::Lock channel_lock_;
// The following are accessed on the IO thread only.
// No lock is necessary for preemption state because it's only accessed on the
// IO thread.
PreemptionState preemption_state_;
// Maximum amount of time that we can spend in PREEMPTING.
// It is reset when we transition to IDLE.
base::TimeDelta max_preemption_time_;
// This timer is used and runs tasks on the IO thread.
std::unique_ptr<base::OneShotTimer> timer_;
base::ThreadChecker io_thread_checker_;
// Keeps track of sync point related state such as message order numbers.
scoped_refptr<SyncPointOrderData> sync_point_order_data_;
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
scoped_refptr<PreemptionFlag> preempting_flag_;
scoped_refptr<PreemptionFlag> preempted_flag_;
SyncPointManager* const sync_point_manager_;
DISALLOW_COPY_AND_ASSIGN(GpuChannelMessageQueue);
};
} // namespace gpu
#endif // GPU_IPC_SERVICE_GPU_CHANNEL_H_