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a900594978
Add 'export_buffer'/'import_buffer' calls in order to support buffer sharing between GPU sessions. Reduce CAP costs for Gpu::Connection from 256 to 32. issue #4380
252 lines
6.9 KiB
C++
252 lines
6.9 KiB
C++
/*
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* \brief Gpu session interface.
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* \author Josef Soentgen
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* \date 2017-04-28
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*/
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/*
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* Copyright (C) 2017-2021 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__GPU_SESSION__GPU_SESSION_H_
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#define _INCLUDE__GPU_SESSION__GPU_SESSION_H_
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#include <base/id_space.h>
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#include <session/session.h>
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namespace Gpu {
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using addr_t = Genode::uint64_t;
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struct Buffer;
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using Buffer_id = Genode::Id_space<Buffer>::Id;
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using Buffer_capability = Genode::Capability<Buffer>;
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/*
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* Attributes for mapping a buffer
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*/
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struct Mapping_attributes
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{
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bool readable;
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bool writeable;
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static Mapping_attributes ro()
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{
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return { .readable = true, .writeable = false };
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}
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static Mapping_attributes rw()
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{
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return { .readable = true, .writeable = true };
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}
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static Mapping_attributes wo()
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{
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return { .readable = false, .writeable = true };
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}
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};
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struct Sequence_number;
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struct Session;
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}
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/*
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* Execution buffer sequence number
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*/
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struct Gpu::Sequence_number
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{
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Genode::uint64_t value;
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};
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/*
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* Gpu session interface
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*/
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struct Gpu::Session : public Genode::Session
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{
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struct Out_of_ram : Genode::Exception { };
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struct Out_of_caps : Genode::Exception { };
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struct Invalid_state : Genode::Exception { };
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struct Conflicting_id : Genode::Exception { };
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struct Mapping_buffer_failed : Genode::Exception { };
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enum { REQUIRED_QUOTA = 1024 * 1024, CAP_QUOTA = 32, };
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static const char *service_name() { return "Gpu"; }
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virtual ~Session() { }
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/***********************
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** Session interface **
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***********************/
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/**
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* Get GPU information dataspace
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*/
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virtual Genode::Dataspace_capability info_dataspace() const = 0;
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/**
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* Execute commands from given buffer
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*
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* \param id buffer id
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* \param size size of the batch buffer in bytes
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*
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* \return execution buffer sequence number for complete checks
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*
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* \throw Invalid_state is thrown if the provided buffer is not valid, e.g not mapped
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*/
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virtual Gpu::Sequence_number exec_buffer(Buffer_id id, Genode::size_t size) = 0;
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/**
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* Check if execution buffer has been completed
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*
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* \param seqno sequence number of the execution buffer
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*
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* \return true if execution buffer has been finished, otherwise
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* false is returned
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*/
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virtual bool complete(Sequence_number seqno) = 0;
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/**
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* Register completion signal handler
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*
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* \param sigh signal handler that is called when the execution
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* has completed
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*/
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virtual void completion_sigh(Genode::Signal_context_capability sigh) = 0;
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/**
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* Allocate buffer dataspace
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*
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* \param id buffer id to be associated with the buffer
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* \param size size of buffer in bytes
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*
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* \throw Out_of_ram
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* \throw Out_of_caps
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* \throw Conflicting_id
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*/
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virtual Genode::Dataspace_capability alloc_buffer(Buffer_id id, Genode::size_t size) = 0;
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/**
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* Free buffer dataspace
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*
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* \param ds dataspace capability for buffer
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*/
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virtual void free_buffer(Buffer_id id) = 0;
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/**
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* Export buffer dataspace from GPU session
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*
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* \param id buffer id of associated buffer
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*/
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virtual Buffer_capability export_buffer(Buffer_id id) = 0;
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/**
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* Import buffer dataspace to GPU session
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*
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* \param cap capability of buffer as retrieved bu 'export_buffer'
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* \param id buffer id to be associated to this buffer in the session
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*
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* \throw Conflicting_id
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* \throw Out_of_caps
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* \throw Out_of_ram
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* \throw Invalid_state (cap is no longer valid)
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*/
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virtual void import_buffer(Buffer_capability cap, Buffer_id id) = 0;
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/**
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* Map buffer
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*
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* \param id buffer id
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* \param aperture if true create CPU accessible mapping through
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* GGTT window, otherwise create PPGTT mapping
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* \param attrs specify how the buffer is mapped
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*
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* \throw Mapping_buffer_failed
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* \throw Out_of_caps
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* \throw Out_of_ram
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*/
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virtual Genode::Dataspace_capability map_buffer(Buffer_id id,
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bool aperture,
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Mapping_attributes attrs) = 0;
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/**
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* Unmap buffer
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*
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* \param id buffer id
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*/
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virtual void unmap_buffer(Buffer_id id) = 0;
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/**
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* Map buffer in PPGTT
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*
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* \param id buffer id
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* \param va virtual address
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*
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* \throw Mapping_buffer_failed
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* \throw Out_of_caps
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* \throw Out_of_ram
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*/
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virtual bool map_buffer_ppgtt(Buffer_id id, Gpu::addr_t va) = 0;
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/**
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* Unmap buffer
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*
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* \param id buffer id
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*/
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virtual void unmap_buffer_ppgtt(Buffer_id id, Gpu::addr_t) = 0;
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/**
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* Set tiling for buffer
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*
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* \param id buffer id
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* \param mode tiling mode
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*/
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virtual bool set_tiling(Buffer_id id, unsigned mode) = 0;
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/*******************
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** RPC interface **
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*******************/
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GENODE_RPC(Rpc_info_dataspace, Genode::Dataspace_capability, info_dataspace);
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GENODE_RPC_THROW(Rpc_exec_buffer, Gpu::Sequence_number, exec_buffer,
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GENODE_TYPE_LIST(Invalid_state),
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Gpu::Buffer_id, Genode::size_t);
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GENODE_RPC(Rpc_complete, bool, complete,
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Gpu::Sequence_number);
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GENODE_RPC(Rpc_completion_sigh, void, completion_sigh,
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Genode::Signal_context_capability);
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GENODE_RPC_THROW(Rpc_alloc_buffer, Genode::Dataspace_capability, alloc_buffer,
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GENODE_TYPE_LIST(Out_of_caps, Out_of_ram),
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Gpu::Buffer_id, Genode::size_t);
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GENODE_RPC(Rpc_free_buffer, void, free_buffer, Gpu::Buffer_id);
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GENODE_RPC(Rpc_export_buffer, Gpu::Buffer_capability, export_buffer, Gpu::Buffer_id);
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GENODE_RPC_THROW(Rpc_import_buffer, void, import_buffer,
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GENODE_TYPE_LIST(Out_of_caps, Out_of_ram, Conflicting_id, Invalid_state),
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Gpu::Buffer_capability, Gpu::Buffer_id);
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GENODE_RPC_THROW(Rpc_map_buffer, Genode::Dataspace_capability, map_buffer,
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GENODE_TYPE_LIST(Mapping_buffer_failed, Out_of_caps, Out_of_ram),
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Gpu::Buffer_id, bool, Gpu::Mapping_attributes);
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GENODE_RPC(Rpc_unmap_buffer, void, unmap_buffer,
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Gpu::Buffer_id);
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GENODE_RPC_THROW(Rpc_map_buffer_ppgtt, bool, map_buffer_ppgtt,
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GENODE_TYPE_LIST(Mapping_buffer_failed, Out_of_caps, Out_of_ram),
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Gpu::Buffer_id, Gpu::addr_t);
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GENODE_RPC(Rpc_unmap_buffer_ppgtt, void, unmap_buffer_ppgtt,
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Gpu::Buffer_id, Gpu::addr_t);
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GENODE_RPC(Rpc_set_tiling, bool, set_tiling,
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Gpu::Buffer_id, unsigned);
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GENODE_RPC_INTERFACE(Rpc_info_dataspace, Rpc_exec_buffer,
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Rpc_complete, Rpc_completion_sigh, Rpc_alloc_buffer,
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Rpc_free_buffer, Rpc_export_buffer, Rpc_import_buffer,
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Rpc_map_buffer, Rpc_unmap_buffer,
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Rpc_map_buffer_ppgtt, Rpc_unmap_buffer_ppgtt,
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Rpc_set_tiling);
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};
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#endif /* _INCLUDE__GPU_SESSION__GPU_SESSION_H_ */
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