genode/repos/os/include/gpu_session/gpu_session.h
Josef Söntgen 198019edca os: add Gpu driver for Intel Gen8 HD graphics
This commit introduces a experimental 3D driver for Intel Gen8 HD
graphics devices as well as the corresponding Gpu session.

Fixes #2507.
2017-08-30 09:59:57 +02:00

185 lines
4.9 KiB
C++

/*
* \brief Gpu session interface.
* \author Josef Soentgen
* \date 2017-04-28
*/
/*
* Copyright (C) 2017 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
*/
#ifndef _INCLUDE__GPU_SESSION__GPU_SESSION_H_
#define _INCLUDE__GPU_SESSION__GPU_SESSION_H_
#include <session/session.h>
namespace Gpu {
using addr_t = Genode::uint64_t;
struct Info;
struct Session;
}
/*
* Gpu information
*
* Used to query information in the DRM backend
*/
struct Gpu::Info
{
using Chip_id = Genode::uint16_t;
using Features = Genode::uint32_t;
using size_t = Genode::size_t;
using Context_id = Genode::uint32_t;
Chip_id chip_id;
Features features;
size_t aperture_size;
Context_id ctx_id;
Info(Chip_id chip_id, Features features,
size_t aperture_size, Context_id ctx_id)
:
chip_id(chip_id), features(features),
aperture_size(aperture_size), ctx_id(ctx_id)
{ }
};
/*
* Gpu session interface
*/
struct Gpu::Session : public Genode::Session
{
struct Out_of_ram : Genode::Exception { };
struct Out_of_caps : Genode::Exception { };
enum { REQUIRED_QUOTA = 1024 * 1024, CAP_QUOTA = 8, };
static const char *service_name() { return "Gpu"; }
virtual ~Session() { }
/***********************
** Session interface **
***********************/
/**
* Query GPU information
*/
virtual Info info() const = 0;
/**
* Execute commands from given buffer
*
* \param cap capability to buffer object containing the exec buffer
* \param size size of the batch buffer in bytes
*/
virtual void exec_buffer(Genode::Dataspace_capability cap, Genode::size_t size) = 0;
/**
* Register completion signal handler
*
* \param sigh signal handler that is called when the execution
* has completed
*/
virtual void completion_sigh(Genode::Signal_context_capability sigh) = 0;
/**
* Allocate buffer dataspace
*
* \param size size of buffer in bytes
*
* \throw Out_of_ram
* \throw Out_of_caps
*/
virtual Genode::Dataspace_capability alloc_buffer(Genode::size_t size) = 0;
/**
* Free buffer dataspace
*
* \param ds dataspace capability for buffer
*/
virtual void free_buffer(Genode::Dataspace_capability ds) = 0;
/**
* Map buffer
*
* \param ds dataspace capability for buffer
* \param aperture if true create CPU accessible mapping through
* GGTT window, otherwise create PPGTT mapping
*/
virtual Genode::Dataspace_capability map_buffer(Genode::Dataspace_capability ds,
bool aperture) = 0;
/**
* Unmap buffer
*
* \param ds dataspace capability for buffer
*/
virtual void unmap_buffer(Genode::Dataspace_capability ds) = 0;
/**
* Map buffer in PPGTT
*
* \param ds dataspace capability for buffer
* \param va virtual address
*/
virtual bool map_buffer_ppgtt(Genode::Dataspace_capability ds,
Gpu::addr_t va) = 0;
/**
* Unmap buffer
*
* \param ds dataspace capability for buffer
*/
virtual void unmap_buffer_ppgtt(Genode::Dataspace_capability ds, Gpu::addr_t) = 0;
/**
* Set tiling for buffer
*
* \param ds dataspace capability for buffer
* \param mode tiling mode
*/
virtual bool set_tiling(Genode::Dataspace_capability ds, unsigned mode) = 0;
/*******************
** RPC interface **
*******************/
GENODE_RPC(Rpc_info, Info, info);
GENODE_RPC(Rpc_exec_buffer, void, exec_buffer, Genode::Dataspace_capability,
Genode::size_t);
GENODE_RPC(Rpc_completion_sigh, void, completion_sigh,
Genode::Signal_context_capability);
GENODE_RPC_THROW(Rpc_alloc_buffer, Genode::Dataspace_capability, alloc_buffer,
GENODE_TYPE_LIST(Out_of_ram),
Genode::size_t);
GENODE_RPC(Rpc_free_buffer, void, free_buffer, Genode::Dataspace_capability);
GENODE_RPC_THROW(Rpc_map_buffer, Genode::Dataspace_capability, map_buffer,
GENODE_TYPE_LIST(Out_of_ram),
Genode::Dataspace_capability, bool);
GENODE_RPC(Rpc_unmap_buffer, void, unmap_buffer,
Genode::Dataspace_capability);
GENODE_RPC_THROW(Rpc_map_buffer_ppgtt, bool, map_buffer_ppgtt,
GENODE_TYPE_LIST(Out_of_ram),
Genode::Dataspace_capability, Gpu::addr_t);
GENODE_RPC(Rpc_unmap_buffer_ppgtt, void, unmap_buffer_ppgtt,
Genode::Dataspace_capability, Gpu::addr_t);
GENODE_RPC(Rpc_set_tiling, bool, set_tiling,
Genode::Dataspace_capability, unsigned);
GENODE_RPC_INTERFACE(Rpc_info, Rpc_exec_buffer,
Rpc_completion_sigh, Rpc_alloc_buffer,
Rpc_free_buffer, Rpc_map_buffer, Rpc_unmap_buffer,
Rpc_map_buffer_ppgtt, Rpc_unmap_buffer_ppgtt,
Rpc_set_tiling);
};
#endif /* _INCLUDE__GPU_SESSION__GPU_SESSION_H_ */