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gpu: introduce information dataspace

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The current info implementation (as RPC) is limited in a few ways:

  * The amount of data that may be transferred is constrained by the
    underlying base platform
  * Most information never changes during run time but is copied
    nonetheless
  * The information differs depending on the used GPU device and
    in its current implementation only contains Intel GPU specific
    details

With this commit the 'info' RPC call is replaced with the
'info_dataspace' call that transfers the capability for the dataspace
containing the information only. This is complemented by a client
local 'attached_info' call that allows for getting typed access to
the information. The layout of the information is moved to its own
and GPU-specific header file, e.g., 'gpu/info_intel.h'

Issue #4265.
This commit is contained in:
Josef Söntgen 2021-09-23 16:36:48 +02:00 committed by Norman Feske
parent cfb170c719
commit e37792ce94
7 changed files with 139 additions and 79 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
repos/libports/src/lib/libdrm/ioctl_iris.cc
View File

@ -21,6 +21,7 @@
#include <base/sleep.h>
#include <gpu_session/connection.h>
#include <gpu/info_intel.h>
#include <util/retry.h>
extern "C" {
@ -223,7 +224,8 @@ class Drm_call
Genode::Env &_env;
Genode::Heap _heap { _env.ram(), _env.rm() };
Gpu::Connection _gpu_session { _env };
Gpu::Info _gpu_info { _gpu_session.info() };
Gpu::Info_intel const &_gpu_info {
*_gpu_session.attached_info<Gpu::Info_intel>() };
size_t _available_gtt_size { _gpu_info.aperture_size };
bool _complete { false };
@ -1144,12 +1146,11 @@ class Drm_call
while (_complete == false)
_env.ep().wait_and_dispatch_one_io_signal();
/* make done buffer objects */
Gpu::Info gpu_info { _gpu_session.info() };
/* mark done buffer objects */
_buffer_space.for_each<Buffer>([&] (Buffer &h) {
if (!h.busy) return;
if (h.seqno.value > gpu_info.last_completed.value) return;
if (h.seqno.value > _gpu_info.last_completed.value) return;
h.busy = false;
/*

66
repos/os/include/gpu/info_intel.h Normal file
View File

@ -0,0 +1,66 @@
/*
* \brief Gpu session interface.
* \author Josef Soentgen
* \date 2021-09-23
*/
/*
* Copyright (C) 2021 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_INFO_INTEL_H_
#define _INCLUDE__GPU_INFO_INTEL_H_
#include <gpu_session/gpu_session.h>
namespace Gpu {
struct Info_intel;
}
/*
* Gpu information
*
* Used to query information in the DRM backend
*/
struct Gpu::Info_intel
{
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;
Sequence_number last_completed;
struct Revision { Genode::uint8_t value; } revision;
struct Slice_mask { unsigned value; } slice_mask;
struct Subslice_mask { unsigned value; } subslice_mask;
struct Eu_total { unsigned value; } eus;
struct Subslices { unsigned value; } subslices;
Info_intel(Chip_id chip_id, Features features, size_t aperture_size,
Context_id ctx_id, Sequence_number last,
Revision rev, Slice_mask s_mask, Subslice_mask ss_mask,
Eu_total eu, Subslices subslice)
:
chip_id(chip_id), features(features),
aperture_size(aperture_size), ctx_id(ctx_id),
last_completed(last),
revision(rev),
slice_mask(s_mask),
subslice_mask(ss_mask),
eus(eu),
subslices(subslice)
{ }
};
#endif /* _INCLUDE__GPU_INFO_INTEL_H_ */

4
repos/os/include/gpu_session/client.h
View File

@ -37,8 +37,8 @@ class Gpu::Session_client : public Genode::Rpc_client<Session>
** Session interface **
***********************/
Info info() const override {
return call<Rpc_info>(); }
Genode::Dataspace_capability info_dataspace() const override {
return call<Rpc_info_dataspace>(); }
Gpu::Sequence_number exec_buffer(Buffer_id id,
Genode::size_t size) override {

24
repos/os/include/gpu_session/connection.h
View File

@ -5,7 +5,7 @@
*/
/*
* Copyright (C) 2017 Genode Labs GmbH
* Copyright (C) 2017-2021 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.
@ -17,11 +17,19 @@
#include <gpu_session/client.h>
#include <base/connection.h>
#include <base/allocator.h>
#include <base/attached_dataspace.h>
namespace Gpu { struct Connection; }
struct Gpu::Connection : Genode::Connection<Session>, Session_client
{
/**
* Attached GPU information dataspace
*
* \noapi
*/
Genode::Attached_dataspace _info_dataspace;
/**
* Issue session request
*
@ -45,8 +53,20 @@ struct Gpu::Connection : Genode::Connection<Session>, Session_client
const char *label = "")
:
Genode::Connection<Session>(env, _session(env.parent(), label, quota)),
Session_client(cap())
Session_client(cap()),
_info_dataspace(env.rm(), info_dataspace())
{ }
/**
* Get typed pointer to the information dataspace
*
* \return typed pointer
*/
template <typename T>
T const *attached_info() const
{
return _info_dataspace.local_addr<T>();
}
};
#endif /* _INCLUDE__GPU_SESSION__CONNECTION_H_ */

51
repos/os/include/gpu_session/gpu_session.h
View File

@ -25,7 +25,6 @@ namespace Gpu {
using Buffer_id = Genode::Id_space<Buffer>::Id;
struct Sequence_number;
struct Info;
struct Session;
}
@ -38,48 +37,6 @@ struct Gpu::Sequence_number
};
/*
* 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;
Sequence_number last_completed;
struct Revision { Genode::uint8_t value; } revision;
struct Slice_mask { unsigned value; } slice_mask;
struct Subslice_mask { unsigned value; } subslice_mask;
struct Eu_total { unsigned value; } eus;
struct Subslices { unsigned value; } subslices;
Info(Chip_id chip_id, Features features, size_t aperture_size,
Context_id ctx_id, Sequence_number last,
Revision rev, Slice_mask s_mask, Subslice_mask ss_mask,
Eu_total eu, Subslices subslice)
:
chip_id(chip_id), features(features),
aperture_size(aperture_size), ctx_id(ctx_id),
last_completed(last),
revision(rev),
slice_mask(s_mask),
subslice_mask(ss_mask),
eus(eu),
subslices(subslice)
{ }
};
/*
* Gpu session interface
*/
@ -102,9 +59,9 @@ struct Gpu::Session : public Genode::Session
***********************/
/**
* Query GPU information
* Get GPU information dataspace
*/
virtual Info info() const = 0;
virtual Genode::Dataspace_capability info_dataspace() const = 0;
/**
* Execute commands from given buffer
@ -194,7 +151,7 @@ struct Gpu::Session : public Genode::Session
** RPC interface **
*******************/
GENODE_RPC(Rpc_info, Info, info);
GENODE_RPC(Rpc_info_dataspace, Genode::Dataspace_capability, info_dataspace);
GENODE_RPC_THROW(Rpc_exec_buffer, Gpu::Sequence_number, exec_buffer,
GENODE_TYPE_LIST(Invalid_state),
Gpu::Buffer_id, Genode::size_t);
@ -217,7 +174,7 @@ struct Gpu::Session : public Genode::Session
GENODE_RPC(Rpc_set_tiling, bool, set_tiling,
Gpu::Buffer_id, unsigned);
GENODE_RPC_INTERFACE(Rpc_info, Rpc_exec_buffer,
GENODE_RPC_INTERFACE(Rpc_info_dataspace, 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,

2
repos/os/recipes/api/gpu_session/content.mk
View File

@ -1,2 +1,2 @@
MIRRORED_FROM_REP_DIR := include/gpu_session
MIRRORED_FROM_REP_DIR := include/gpu_session include/gpu
include $(REP_DIR)/recipes/api/session.inc

60
repos/os/src/drivers/gpu/intel/main.cc
View File

@ -13,6 +13,7 @@
/* Genode includes */
#include <base/attached_rom_dataspace.h>
#include <base/attached_ram_dataspace.h>
#include <base/component.h>
#include <base/heap.h>
#include <base/log.h>
@ -22,6 +23,7 @@
#include <base/session_object.h>
#include <dataspace/client.h>
#include <gpu_session/gpu_session.h>
#include <gpu/info_intel.h>
#include <io_mem_session/connection.h>
#include <irq_session/connection.h>
#include <platform_device/client.h>
@ -113,11 +115,11 @@ struct Igd::Device
Device_info _info { };
Gpu::Info::Revision _revision { };
Gpu::Info::Slice_mask _slice_mask { };
Gpu::Info::Subslice_mask _subslice_mask { };
Gpu::Info::Eu_total _eus { };
Gpu::Info::Subslices _subslices { };
Gpu::Info_intel::Revision _revision { };
Gpu::Info_intel::Slice_mask _slice_mask { };
Gpu::Info_intel::Subslice_mask _subslice_mask { };
Gpu::Info_intel::Eu_total _eus { };
Gpu::Info_intel::Subslices _subslices { };
void _pci_info(String<64> const &descr) const
{
@ -533,6 +535,8 @@ struct Igd::Device
enum {
APERTURE_SIZE = 32u << 20,
MAX_FENCES = 16,
INFO_SIZE = 4096,
};
Device &_device;
@ -541,7 +545,10 @@ struct Igd::Device
Engine<Rcs_context> rcs;
uint32_t active_fences { 0 };
uint64_t _current_seqno { 0 };
uint64_t _completed_seqno { 0 };
Genode::Attached_ram_dataspace _info_dataspace;
Gpu::Info_intel &_info {
*_info_dataspace.local_addr<Gpu::Info_intel>() };
uint32_t _id_alloc()
{
@ -551,13 +558,24 @@ struct Igd::Device
return v << 8;
}
Vgpu(Device &device, Allocator &alloc)
Vgpu(Device &device, Allocator &alloc,
Ram_allocator &ram, Region_map &rm)
:
_device(device),
_id(_id_alloc()),
rcs(_device, _id + Rcs_context::HW_ID, alloc)
rcs(_device, _id + Rcs_context::HW_ID, alloc),
_info_dataspace(ram, rm, INFO_SIZE)
{
_device.vgpu_created();
_info = Gpu::Info_intel(_device.id(), _device.features(),
APERTURE_SIZE,
_id, Gpu::Sequence_number { .value = 0 },
_device._revision,
_device._slice_mask,
_device._subslice_mask,
_device._eus,
_device._subslices);
}
~Vgpu()
@ -565,6 +583,11 @@ struct Igd::Device
_device.vgpu_released();
}
Genode::Dataspace_capability info_dataspace() const
{
return _info_dataspace.cap();
}
uint32_t id() const { return _id; }
void completion_sigh(Genode::Signal_context_capability sigh) {
@ -575,12 +598,12 @@ struct Igd::Device
uint64_t current_seqno() const { return _current_seqno; }
uint64_t completed_seqno() const { return _completed_seqno; }
uint64_t completed_seqno() const { return _info.last_completed.value; }
void user_complete()
{
/* remember last completed seqno for info object */
_completed_seqno = _device.seqno();
_info.last_completed =
Gpu::Sequence_number { .value = _device.seqno() };
}
bool setup_ring_buffer(Gpu::addr_t const buffer_addr)
@ -1150,7 +1173,7 @@ struct Igd::Device
}
_eus = Gpu::Info::Eu_total { eu_total };
_eus = Gpu::Info_intel::Eu_total { eu_total };
}
/*********************
@ -1540,7 +1563,7 @@ class Gpu::Session_component : public Genode::Session_object<Gpu::Session>
_rm(rm),
_ram(ram, _ram_quota_guard(), _cap_quota_guard()),
_device(device),
_vgpu(_device, _heap)
_vgpu(_device, _heap, ram, rm)
{ }
~Session_component()
@ -1561,16 +1584,9 @@ class Gpu::Session_component : public Genode::Session_object<Gpu::Session>
** Gpu session interface **
***************************/
Info info() const override
Genode::Dataspace_capability info_dataspace() const override
{
Genode::size_t const aperture_size = Igd::Device::Vgpu::APERTURE_SIZE;
return Info(_device.id(), _device.features(), aperture_size,
_vgpu.id(), { .value = _vgpu.completed_seqno() },
_device._revision,
_device._slice_mask,
_device._subslice_mask,
_device._eus,
_device._subslices);
return _vgpu.info_dataspace();
}
Gpu::Sequence_number exec_buffer(Buffer_id id,