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source | linux | .. SPDX-License-Identifier: GPL-2.0
=============
NFSD IO MODES
=============
Overview
========
NFSD has historically always used buffered IO when servicing READ and
WRITE operations. BUFFERED is NFSD's default IO mode, but it is possible
to override that default to use either DONTCACHE or DIRECT IO modes.
Experime... | Documentation/filesystems/nfs/nfsd-io-modes.rst | null | null | null | null | null |
source | linux | NFSD Maintainer Entry Profile
=============================
A Maintainer Entry Profile supplements the top-level process
documents (found in Documentation/process/) with customs that are
specific to a subsystem and its maintainers. A contributor may use
this document to set their expectations and avoid common mistakes... | Documentation/filesystems/nfs/nfsd-maintainer-entry-profile.rst | null | null | null | null | null |
source | linux | ==========================
Reference counting in pnfs
==========================
The are several inter-related caches. We have layouts which can
reference multiple devices, each of which can reference multiple data servers.
Each data server can be referenced by multiple devices. Each device
can be referenced by mult... | Documentation/filesystems/nfs/pnfs.rst | null | null | null | null | null |
source | linux | Reexporting NFS filesystems
===========================
Overview
--------
It is possible to reexport an NFS filesystem over NFS. However, this
feature comes with a number of limitations. Before trying it, we
recommend some careful research to determine whether it will work for
your purposes.
A discussion of curren... | Documentation/filesystems/nfs/reexport.rst | null | null | null | null | null |
source | linux | =========
RPC Cache
=========
This document gives a brief introduction to the caching
mechanisms in the sunrpc layer that is used, in particular,
for NFS authentication.
Caches
======
The caching replaces the old exports table and allows for
a wide variety of values to be caches.
There are a number of caches that a... | Documentation/filesystems/nfs/rpc-cache.rst | null | null | null | null | null |
source | linux | =========================================
rpcsec_gss support for kernel RPC servers
=========================================
This document gives references to the standards and protocols used to
implement RPCGSS authentication in kernel RPC servers such as the NFS
server and the NFS client's NFSv4.0 callback server. ... | Documentation/filesystems/nfs/rpc-server-gss.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========================================
Mounting root file system via SMB (cifs.ko)
===========================================
Written 2019 by Paulo Alcantara <palcantara@suse.de>
Written 2019 by Aurelien Aptel <aaptel@suse.com>
The CONFIG_CIFS_ROOT option enables experiment... | Documentation/filesystems/smb/cifsroot.rst | null | null | null | null | null |
source | linux | ===============================
CIFS
===============================
.. toctree::
:maxdepth: 1
ksmbd
cifsroot
smbdirect | Documentation/filesystems/smb/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==========================
KSMBD - SMB3 Kernel Server
==========================
KSMBD is a linux kernel server which implements SMB3 protocol in kernel space
for sharing files over network.
KSMBD architecture
==================
The subset of performance related operations belong... | Documentation/filesystems/smb/ksmbd.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========================
SMB Direct - SMB3 over RDMA
===========================
This document describes how to set up the Linux SMB client and server to
use RDMA.
Overview
========
The Linux SMB kernel client supports SMB Direct, which is a transport
scheme for SMB3 that uses ... | Documentation/filesystems/smb/smbdirect.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==============
SPU Filesystem
==============
.. toctree::
:maxdepth: 1
spufs
spu_create
spu_run | Documentation/filesystems/spufs/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==========
spu_create
==========
Name
====
spu_create - create a new spu context
Synopsis
========
::
#include <sys/types.h>
#include <sys/spu.h>
int spu_create(const char *pathname, int flags, mode_t mode);
Description
===========
... | Documentation/filesystems/spufs/spu_create.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=======
spu_run
=======
Name
====
spu_run - execute an spu context
Synopsis
========
::
#include <sys/spu.h>
int spu_run(int fd, unsigned int *npc, unsigned int *event);
Description
===========
The spu_run system call is used on PowerPC machin... | Documentation/filesystems/spufs/spu_run.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====
spufs
=====
Name
====
spufs - the SPU file system
Description
===========
The SPU file system is used on PowerPC machines that implement the Cell
Broadband Engine Architecture in order to access Synergistic Processor
Units (SPUs).
The ... | Documentation/filesystems/spufs/spufs.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
============================
XFS Filesystem Documentation
============================
.. toctree::
:maxdepth: 2
:numbered:
xfs-delayed-logging-design
xfs-maintainer-entry-profile
xfs-self-describing-metadata
xfs-online-fsck-design | Documentation/filesystems/xfs/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==================
XFS Logging Design
==================
Preamble
========
This document describes the design and algorithms that the XFS journalling
subsystem is based on. This document describes the design and algorithms that
the XFS journalling subsystem is based on so that rea... | Documentation/filesystems/xfs/xfs-delayed-logging-design.rst | null | null | null | null | null |
source | linux | XFS Maintainer Entry Profile
============================
Overview
--------
XFS is a well known high-performance filesystem in the Linux kernel.
The aim of this project is to provide and maintain a robust and
performant filesystem.
Patches are generally merged to the for-next branch of the appropriate
git repository.... | Documentation/filesystems/xfs/xfs-maintainer-entry-profile.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. _xfs_online_fsck_design:
..
Mapping of heading styles within this document:
Heading 1 uses "====" above and below
Heading 2 uses "===="
Heading 3 uses "----"
Heading 4 uses "````"
Heading 5 uses "^^^^"
Heading 6 uses "~~~~"
... | Documentation/filesystems/xfs/xfs-online-fsck-design.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. _xfs_self_describing_metadata:
============================
XFS Self Describing Metadata
============================
Introduction
============
The largest scalability problem facing XFS is not one of algorithmic
scalability, but of verification of the filesystem structure. Sca... | Documentation/filesystems/xfs/xfs-self-describing-metadata.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===============================
The Linux kernel firmware guide
===============================
This section describes the ACPI subsystem in Linux from firmware perspective.
.. toctree::
:maxdepth: 1
acpi/index | Documentation/firmware-guide/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==================================
_DSD Device Properties Usage Rules
==================================
Properties, Property Sets and Property Subsets
==============================================
The _DSD (Device Specific Data) configuration object, introduced in ACPI 5.1,
allo... | Documentation/firmware-guide/acpi/DSD-properties-rules.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
=========================================================
Special Usage Model of the ACPI Control Method Lid Device
=========================================================
:Copyright: |copy| 2016, Intel Corporation
:Author: Lv Zheng <lv.zheng@intel.com>... | Documentation/firmware-guide/acpi/acpi-lid.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
================
The AML Debugger
================
:Copyright: |copy| 2016, Intel Corporation
:Author: Lv Zheng <lv.zheng@intel.com>
This document describes the usage of the AML debugger embedded in the Linux
kernel.
1. Build the debugger
==============... | Documentation/firmware-guide/acpi/aml-debugger.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
Chrome OS ACPI Device
=====================
Hardware functionality specific to Chrome OS is exposed through a Chrome OS ACPI device.
The plug and play ID of a Chrome OS ACPI device is GGL0001 and the hardware ID is
GOOG0016. The following ACPI objects are sup... | Documentation/firmware-guide/acpi/chromeos-acpi-device.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====================
ACPI CA Debug Output
====================
The ACPI CA can generate debug output. This document describes how to use this
facility.
Compile-time configuration
==========================
The ACPI CA debug output is globally enabled by CONFIG_ACPI_DEBUG. If th... | Documentation/firmware-guide/acpi/debug.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=============================
ACPI Based Device Enumeration
=============================
ACPI 5 introduced a set of new resources (UartTSerialBus, I2cSerialBus,
SpiSerialBus, GpioIo and GpioInt) which can be used in enumerating slave
devices behind serial bus controllers.
In addi... | Documentation/firmware-guide/acpi/enumeration.rst | null | null | null | null | null |
source | linux | =====================================================
Intel INT3496 ACPI device extcon driver documentation
=====================================================
The Intel INT3496 ACPI device extcon driver is a driver for ACPI
devices with an acpi-id of INT3496, such as found for example on
Intel Baytrail and Cherrytr... | Documentation/firmware-guide/acpi/extcon-intel-int3496.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======================================
_DSD Device Properties Related to GPIO
======================================
With the release of ACPI 5.1, the _DSD configuration object finally
allows names to be given to GPIOs (and other things as well) returned
by _CRS. Previously we were... | Documentation/firmware-guide/acpi/gpio-properties.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==============
ACPI I2C Muxes
==============
Describing an I2C device hierarchy that includes I2C muxes requires an ACPI
Device () scope per mux channel.
Consider this topology::
+------+ +------+
| SMB1 |-->| MUX0 |--CH00--> i2c client A (0x50)
| | | 0x70 |-... | Documentation/firmware-guide/acpi/i2c-muxes.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
============
ACPI Support
============
.. toctree::
:maxdepth: 1
namespace
dsd/graph
dsd/data-node-references
dsd/leds
dsd/phy
enumeration
osi
method-tracing
DSD-properties-rules
debug
aml-debugger
apei/output_format
apei/einj
gpio-prop... | Documentation/firmware-guide/acpi/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
Intel North Mux-Agent
=====================
Introduction
============
North Mux-Agent is a function of the Intel PMC firmware that is supported on
most Intel based platforms that have the PMC microcontroller. It's used for
configuring the various USB Multiple... | Documentation/firmware-guide/acpi/intel-pmc-mux.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========================
Low Power Idle Table (LPIT)
===========================
To enumerate platform Low Power Idle states, Intel platforms are using
“Low Power Idle Table” (LPIT). More details about this table can be
downloaded from:
https://www.uefi.org/sites/default/files/r... | Documentation/firmware-guide/acpi/lpit.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
=====================
ACPICA Trace Facility
=====================
:Copyright: |copy| 2015, Intel Corporation
:Author: Lv Zheng <lv.zheng@intel.com>
Abstract
========
This document describes the functions and the interfaces of the
method tracing facility.... | Documentation/firmware-guide/acpi/method-tracing.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
===================================================
ACPI Device Tree - Representation of ACPI Namespace
===================================================
:Copyright: |copy| 2013, Intel Corporation
:Author: Lv Zheng <lv.zheng@intel.com>
:Credit: Thank... | Documentation/firmware-guide/acpi/namespace.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
========================================
Probing devices in other D states than 0
========================================
Introduction
============
In some cases it may be preferred to leave certain devices powered off for the
entire system bootup if powering on these devices has... | Documentation/firmware-guide/acpi/non-d0-probe.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==========================
ACPI _OSI and _REV methods
==========================
An ACPI BIOS can use the "Operating System Interfaces" method (_OSI)
to find out what the operating system supports. Eg. If BIOS
AML code includes _OSI("XYZ"), the kernel's AML interpreter
can evaluate... | Documentation/firmware-guide/acpi/osi.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
ACPI video extensions
=====================
This driver implement the ACPI Extensions For Display Adapters for
integrated graphics devices on motherboard, as specified in ACPI 2.0
Specification, Appendix B, allowing to perform some basic control like
defining ... | Documentation/firmware-guide/acpi/video_extension.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====================
APEI Error INJection
====================
EINJ provides a hardware error injection mechanism. It is very useful
for debugging and testing APEI and RAS features in general.
You need to check whether your BIOS supports EINJ first. For that, look
for early boot m... | Documentation/firmware-guide/acpi/apei/einj.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==================
APEI output format
==================
APEI uses printk as hardware error reporting interface, the output
format is as follow::
<error record> :=
APEI generic hardware error status
severity: <integer>, <severity string>
section: <i... | Documentation/firmware-guide/acpi/apei/output_format.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
===================================
Referencing hierarchical data nodes
===================================
:Copyright: |copy| 2018, 2021 Intel Corporation
:Author: Sakari Ailus <sakari.ailus@linux.intel.com>
ACPI in general allows referring to device obj... | Documentation/firmware-guide/acpi/dsd/data-node-references.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======
Graphs
======
_DSD
====
_DSD (Device Specific Data) [dsd-guide] is a predefined ACPI device
configuration object that can be used to convey information on
hardware features which are not specifically covered by the ACPI
specification [acpi]. There are two _DSD extensions th... | Documentation/firmware-guide/acpi/dsd/graph.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
========================================
Describing and referring to LEDs in ACPI
========================================
Individual LEDs are described by hierarchical data extension [5] nodes under the
device node, the LED driver chip. The "reg" property... | Documentation/firmware-guide/acpi/dsd/leds.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================
MDIO bus and PHYs in ACPI
=========================
The PHYs on an MDIO bus [phy] are probed and registered using
fwnode_mdiobus_register_phy().
Later, for connecting these PHYs to their respective MACs, the PHYs registered
on the MDIO bus have to be refe... | Documentation/firmware-guide/acpi/dsd/phy.rst | null | null | null | null | null |
source | linux | =================================================
FPGA Device Feature List (DFL) Framework Overview
=================================================
Authors:
- Enno Luebbers <enno.luebbers@intel.com>
- Xiao Guangrong <guangrong.xiao@linux.intel.com>
- Wu Hao <hao.wu@intel.com>
- Xu Yilun <yilun.xu@intel.com>
The De... | Documentation/fpga/dfl.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0+
===================================
Arm Framebuffer Compression (AFBC)
===================================
AFBC is a proprietary lossless image compression protocol and format.
It provides fine-grained random access and minimizes the amount of
data transferred between IP blocks.
... | Documentation/gpu/afbc.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0+
=========================================
Automated testing of the DRM subsystem
=========================================
Introduction
============
Making sure that changes to the core or drivers don't introduce regressions can
be very time-consuming when lots of different hardw... | Documentation/gpu/automated_testing.rst | null | null | null | null | null |
source | linux | =================
Backlight support
=================
.. kernel-doc:: drivers/video/backlight/backlight.c
:doc: overview
.. kernel-doc:: include/linux/backlight.h
:internal:
.. kernel-doc:: drivers/video/backlight/backlight.c
:export: | Documentation/gpu/backlight.rst | null | null | null | null | null |
source | linux | ===============
DRM Driver uAPI
===============
drm/i915 uAPI
=============
.. kernel-doc:: include/uapi/drm/i915_drm.h
drm/nouveau uAPI
================
VM_BIND / EXEC uAPI
-------------------
.. kernel-doc:: drivers/gpu/drm/nouveau/nouveau_exec.c
:doc: Overview
.. kernel-doc:: include/uapi/drm/nouveau_drm.h... | Documentation/gpu/driver-uapi.rst | null | null | null | null | null |
source | linux | ========================
GPU Driver Documentation
========================
.. toctree::
:maxdepth: 3
amdgpu/index
i915
imagination/index
mcde
meson
nouveau
pl111
tegra
tve200
v3d
vc4
vkms
bridge/dw-hdmi
xen-front
xe/index
afbc
komeda-kms
panfrost
panthor
... | Documentation/gpu/drivers.rst | null | null | null | null | null |
source | linux | =================
Kernel clients
=================
.. kernel-doc:: drivers/gpu/drm/drm_client.c
:doc: overview
.. kernel-doc:: include/drm/drm_client.h
:internal:
.. kernel-doc:: drivers/gpu/drm/drm_client.c
:export:
.. kernel-doc:: drivers/gpu/drm/drm_client_modeset.c
:export:
.. kernel-doc:: drivers/... | Documentation/gpu/drm-client.rst | null | null | null | null | null |
source | linux | ==================================
Long running workloads and compute
==================================
Long running workloads (compute) are workloads that will not complete in 10
seconds. (The time let the user wait before he reaches for the power button).
This means that other techniques need to be used to manage t... | Documentation/gpu/drm-compute.rst | null | null | null | null | null |
source | linux | =============
DRM Internals
=============
This chapter documents DRM internals relevant to driver authors and
developers working to add support for the latest features to existing
drivers.
First, we go over some typical driver initialization requirements, like
setting up command buffers, creating an initial output co... | Documentation/gpu/drm-internals.rst | null | null | null | null | null |
source | linux | =============================
Mode Setting Helper Functions
=============================
The DRM subsystem aims for a strong separation between core code and helper
libraries. Core code takes care of general setup and teardown and decoding
userspace requests to kernel internal objects. Everything else is handled by a... | Documentation/gpu/drm-kms-helpers.rst | null | null | null | null | null |
source | linux | =========================
Kernel Mode Setting (KMS)
=========================
Drivers must initialize the mode setting core by calling
drmm_mode_config_init() on the DRM device. The function
initializes the :c:type:`struct drm_device <drm_device>`
mode_config field and never fails. Once done, mode configuration must
b... | Documentation/gpu/drm-kms.rst | null | null | null | null | null |
source | linux | =====================
DRM Memory Management
=====================
Modern Linux systems require large amount of graphics memory to store
frame buffers, textures, vertices and other graphics-related data. Given
the very dynamic nature of many of that data, managing graphics memory
efficiently is thus crucial for the gra... | Documentation/gpu/drm-mm.rst | null | null | null | null | null |
source | linux | .. Copyright 2020 DisplayLink (UK) Ltd.
===================
Userland interfaces
===================
The DRM core exports several interfaces to applications, generally
intended to be used through corresponding libdrm wrapper functions. In
addition, drivers export device-specific interfaces for use by userspace
drivers... | Documentation/gpu/drm-uapi.rst | null | null | null | null | null |
source | linux | .. _drm-client-usage-stats:
======================
DRM client usage stats
======================
DRM drivers can choose to export partly standardised text output via the
`fops->show_fdinfo()` as part of the driver specific file operations registered
in the `struct drm_driver` object registered with the DRM core.
One... | Documentation/gpu/drm-usage-stats.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
====================
Asynchronous VM_BIND
====================
Nomenclature:
=============
* ``VRAM``: On-device memory. Sometimes referred to as device local memory.
* ``gpu_vm``: A virtual GPU address space. Typically per process, but
can be shared by multiple proce... | Documentation/gpu/drm-vm-bind-async.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
===============
VM_BIND locking
===============
This document attempts to describe what's needed to get VM_BIND locking right,
including the userptr mmu_notifier locking. It also discusses some
optimizations to get rid of the looping through of all userptr mappings and
ex... | Documentation/gpu/drm-vm-bind-locking.rst | null | null | null | null | null |
source | linux | ===========================
drm/i915 Intel GFX Driver
===========================
The drm/i915 driver supports all (with the exception of some very early
models) integrated GFX chipsets with both Intel display and rendering
blocks. This excludes a set of SoC platforms with an SGX rendering unit,
those have basic supp... | Documentation/gpu/i915.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
===========================================================
Misc DRM driver uAPI- and feature implementation guidelines
===========================================================
.. toctree::
drm-vm-bind-async
drm-vm-bind-locking | Documentation/gpu/implementation_guidelines.rst | null | null | null | null | null |
source | linux | ============================
GPU Driver Developer's Guide
============================
.. toctree::
introduction
drm-internals
drm-mm
drm-kms
drm-kms-helpers
drm-uapi
drm-usage-stats
driver-uapi
drm-client
drm-compute
drivers
backlight
vga-switcheroo
vgaarbiter
automated_t... | Documentation/gpu/index.rst | null | null | null | null | null |
source | linux | ============
Introduction
============
The Linux DRM layer contains code intended to support the needs of
complex graphics devices, usually containing programmable pipelines well
suited to 3D graphics acceleration. Graphics drivers in the kernel may
make use of DRM functions to make tasks like memory management,
inter... | Documentation/gpu/introduction.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==============================
drm/komeda Arm display driver
==============================
The drm/komeda driver supports the Arm display processor D71 and later products,
this document gives a brief overview of driver design: how it works and why
design it like that.
Overview o... | Documentation/gpu/komeda-kms.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=======================================================
drm/mcde ST-Ericsson MCDE Multi-channel display engine
=======================================================
.. kernel-doc:: drivers/gpu/drm/mcde/mcde_drv.c
:doc: ST-Ericsson MCDE Driver | Documentation/gpu/mcde.rst | null | null | null | null | null |
source | linux | =============================================
drm/meson AmLogic Meson Video Processing Unit
=============================================
.. kernel-doc:: drivers/gpu/drm/meson/meson_drv.c
:doc: Video Processing Unit
Video Processing Unit
=====================
The Amlogic Meson Display controller is composed of se... | Documentation/gpu/meson.rst | null | null | null | null | null |
source | linux | :orphan:
=====================
MSM Crash Dump Format
=====================
Following a GPU hang the MSM driver outputs debugging information via
/sys/kernel/dri/X/show or via devcoredump (/sys/class/devcoredump/dcdX/data).
This document describes how the output is formatted.
Each entry is in the form key: value. Sec... | Documentation/gpu/msm-crash-dump.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
:orphan:
==============
MSM Preemption
==============
Preemption allows Adreno GPUs to switch to a higher priority ring when work is
pushed to it, reducing latency for high priority submissions.
When preemption is enabled 4 rings are initialized, corresponding to different
priori... | Documentation/gpu/msm-preemption.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
===============================
drm/nouveau NVIDIA GPU Driver
===============================
The drm/nouveau driver provides support for a wide range of NVIDIA GPUs,
covering GeForce, Quadro, and Tesla series, from the NV04 architecture up
to the latest Turing, Ampere, ... | Documentation/gpu/nouveau.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0+
=========================
drm/Panfrost Mali Driver
=========================
.. _panfrost-usage-stats:
Panfrost DRM client usage stats implementation
==============================================
The drm/Panfrost driver implements the DRM client usage stats specification as
do... | Documentation/gpu/panfrost.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0+
=========================
drm/Panthor CSF driver
=========================
.. _panthor-usage-stats:
Panthor DRM client usage stats implementation
==============================================
The drm/Panthor driver implements the DRM client usage stats specification as
documen... | Documentation/gpu/panthor.rst | null | null | null | null | null |
source | linux | ====================================================
drm/pl111 ARM PrimeCell PL110 and PL111 CLCD Driver
====================================================
.. kernel-doc:: drivers/gpu/drm/pl111/pl111_drv.c
:doc: ARM PrimeCell PL110 and PL111 CLCD Driver | Documentation/gpu/pl111.rst | null | null | null | null | null |
source | linux | ===============================================
drm/tegra NVIDIA Tegra GPU and display driver
===============================================
NVIDIA Tegra SoCs support a set of display, graphics and video functions via
the host1x controller. host1x supplies command streams, gathered from a push
buffer provided direct... | Documentation/gpu/tegra.rst | null | null | null | null | null |
source | linux | .. _todo:
=========
TODO list
=========
This section contains a list of smaller janitorial tasks in the kernel DRM
graphics subsystem useful as newbie projects. Or for slow rainy days.
Difficulty
----------
To make it easier task are categorized into different levels:
Starter: Good tasks to get started with the DR... | Documentation/gpu/todo.rst | null | null | null | null | null |
source | linux | ==================================
drm/tve200 Faraday TV Encoder 200
==================================
.. kernel-doc:: drivers/gpu/drm/tve200/tve200_drv.c
:doc: Faraday TV Encoder TVE200 DRM Driver | Documentation/gpu/tve200.rst | null | null | null | null | null |
source | linux | =====================================
drm/v3d Broadcom V3D Graphics Driver
=====================================
.. kernel-doc:: drivers/gpu/drm/v3d/v3d_drv.c
:doc: Broadcom V3D Graphics Driver
GPU buffer object (BO) management
---------------------------------
.. kernel-doc:: drivers/gpu/drm/v3d/v3d_bo.c
:do... | Documentation/gpu/v3d.rst | null | null | null | null | null |
source | linux | =====================================
drm/vc4 Broadcom VC4 Graphics Driver
=====================================
.. kernel-doc:: drivers/gpu/drm/vc4/vc4_drv.c
:doc: Broadcom VC4 Graphics Driver
Display Hardware Handling
=========================
This section covers everything related to the display hardware incl... | Documentation/gpu/vc4.rst | null | null | null | null | null |
source | linux | .. _vga_switcheroo:
==============
VGA Switcheroo
==============
.. kernel-doc:: drivers/gpu/vga/vga_switcheroo.c
:doc: Overview
Modes of Use
============
Manual switching and manual power control
-----------------------------------------
.. kernel-doc:: drivers/gpu/vga/vga_switcheroo.c
:doc: Manual switchin... | Documentation/gpu/vga-switcheroo.rst | null | null | null | null | null |
source | linux | ===========
VGA Arbiter
===========
Graphic devices are accessed through ranges in I/O or memory space. While most
modern devices allow relocation of such ranges, some "Legacy" VGA devices
implemented on PCI will typically have the same "hard-decoded" addresses as
they did on ISA. For more details see "PCI Bus Binding... | Documentation/gpu/vgaarbiter.rst | null | null | null | null | null |
source | linux | .. _vkms:
==========================================
drm/vkms Virtual Kernel Modesetting
==========================================
.. kernel-doc:: drivers/gpu/drm/vkms/vkms_drv.c
:doc: vkms (Virtual Kernel Modesetting)
Setup
=====
The VKMS driver can be setup with the following steps:
To check if VKMS is load... | Documentation/gpu/vkms.rst | null | null | null | null | null |
source | linux | ====================================================
drm/xen-front Xen para-virtualized frontend driver
====================================================
This frontend driver implements Xen para-virtualized display
according to the display protocol described at
include/xen/interface/io/displif.h
Driver modes of o... | Documentation/gpu/xen-front.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0+
===============================================
Xilinx ZynqMP Ultrascale+ DisplayPort Subsystem
===============================================
This subsystem handles DisplayPort video and audio output on the ZynqMP. It
supports in-memory framebuffers with the DisplayPort DMA cont... | Documentation/gpu/zynqmp.rst | null | null | null | null | null |
source | linux | =================================================
AMD Hardware Components Information per Product
=================================================
On this page, you can find the AMD product name and which component version is
part of it.
Accelerated Processing Units (APU) Info
--------------------------------------... | Documentation/gpu/amdgpu/amd-hardware-list-info.rst | null | null | null | null | null |
source | linux | ===============
AMDGPU Glossary
===============
Here you can find some generic acronyms used in the amdgpu driver. Notice that
we have a dedicated glossary for Display Core at
'Documentation/gpu/amdgpu/display/dc-glossary.rst'.
.. glossary::
active_cu_number
The number of CUs that are active on the system.... | Documentation/gpu/amdgpu/amdgpu-glossary.rst | null | null | null | null | null |
source | linux | ==============
AMDGPU DebugFS
==============
The amdgpu driver provides a number of debugfs files to aid in debugging
issues in the driver. These are usually found in
/sys/kernel/debug/dri/<num>.
DebugFS Files
=============
amdgpu_benchmark
----------------
Run benchmarks using the DMA engine the driver uses for G... | Documentation/gpu/amdgpu/debugfs.rst | null | null | null | null | null |
source | linux | ===============
GPU Debugging
===============
General Debugging Options
=========================
The DebugFS section provides documentation on a number files to aid in debugging
issues on the GPU.
GPUVM Debugging
===============
To aid in debugging GPU virtual memory related problems, the driver supports a
numbe... | Documentation/gpu/amdgpu/debugging.rst | null | null | null | null | null |
source | linux | ============================
Core Driver Infrastructure
============================
GPU Hardware Structure
======================
Each ASIC is a collection of hardware blocks. We refer to them as
"IPs" (Intellectual Property blocks). Each IP encapsulates certain
functionality. IPs are versioned and can also be mi... | Documentation/gpu/amdgpu/driver-core.rst | null | null | null | null | null |
source | linux | ================================
Misc AMDGPU driver information
================================
GPU Product Information
=======================
Information about the GPU can be obtained on certain cards
via sysfs
product_name
------------
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
:doc: pro... | Documentation/gpu/amdgpu/driver-misc.rst | null | null | null | null | null |
source | linux | =======================
dGPU firmware flashing
=======================
IFWI
----
Flashing the dGPU integrated firmware image (IFWI) is supported by GPUs that
use the PSP to orchestrate the update (Navi3x or newer GPUs).
For supported GPUs, `amdgpu` will export a series of sysfs files that can be
used for the flash pr... | Documentation/gpu/amdgpu/flashing.rst | null | null | null | null | null |
source | linux | ==========================
drm/amdgpu AMDgpu driver
==========================
The drm/amdgpu driver supports all AMD Radeon GPUs based on the Graphics Core
Next (GCN), Radeon DNA (RDNA), and Compute DNA (CDNA) architectures.
.. toctree::
driver-core
ring-buffer
amd-hardware-list-info
module-parameters
... | Documentation/gpu/amdgpu/index.rst | null | null | null | null | null |
source | linux | ===================
Module Parameters
===================
The amdgpu driver supports the following module parameters:
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | Documentation/gpu/amdgpu/module-parameters.rst | null | null | null | null | null |
source | linux | .. _amdgpu-process-isolation:
.. SPDX-License-Identifier: GPL-2.0
=========================
AMDGPU Process Isolation
=========================
The AMDGPU driver includes a feature that enables automatic process isolation on the graphics engine. This feature serializes access to the graphics engine and adds a cleaner... | Documentation/gpu/amdgpu/process-isolation.rst | null | null | null | null | null |
source | linux | ====================
AMDGPU RAS Support
====================
The AMDGPU RAS interfaces are exposed via sysfs (for informational queries) and
debugfs (for error injection).
RAS debugfs/sysfs Control and Error Injection Interfaces
========================================================
.. kernel-doc:: drivers/gpu/dr... | Documentation/gpu/amdgpu/ras.rst | null | null | null | null | null |
source | linux | =============
Ring Buffer
=============
To handle communication between user space and kernel space, AMD GPUs use a
ring buffer design to feed the engines (GFX, Compute, SDMA, UVD, VCE, VCN, VPE,
etc.). See the figure below that illustrates how this communication works:
.. kernel-figure:: ring_buffers.svg
Ring buff... | Documentation/gpu/amdgpu/ring-buffer.rst | null | null | null | null | null |
source | linux | ===========================================
GPU Power/Thermal Controls and Monitoring
===========================================
HWMON Interfaces
================
.. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
:doc: hwmon
GPU sysfs Power State Interfaces
================================
GPU power controls ... | Documentation/gpu/amdgpu/thermal.rst | null | null | null | null | null |
source | linux | .. _amdgpu-userq:
==================
User Mode Queues
==================
Introduction
============
Similar to the KFD, GPU engine queues move into userspace. The idea is to let
user processes manage their submissions to the GPU engines directly, bypassing
IOCTL calls to the driver to submit work. This reduces ove... | Documentation/gpu/amdgpu/userq.rst | null | null | null | null | null |
source | linux | =====================
AMDGPU XGMI Support
=====================
.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | Documentation/gpu/amdgpu/xgmi.rst | null | null | null | null | null |
source | linux | ========================
Display Core Debug tools
========================
In this section, you will find helpful information on debugging the amdgpu
driver from the display perspective. This page introduces debug mechanisms and
procedures to help you identify if some issues are related to display code.
Narrow down d... | Documentation/gpu/amdgpu/display/dc-debug.rst | null | null | null | null | null |
source | linux | ===========
DC Glossary
===========
On this page, we try to keep track of acronyms related to the display
component. If you do not find what you are looking for, look at the
'Documentation/gpu/amdgpu/amdgpu-glossary.rst'; if you cannot find it anywhere,
consider asking on the amd-gfx mailing list and update this page.... | Documentation/gpu/amdgpu/display/dc-glossary.rst | null | null | null | null | null |
source | linux | .. _dcn_blocks:
==========
DCN Blocks
==========
In this section, you will find some extra details about some of the DCN blocks
and the code documentation when it is automatically generated.
DCHUBBUB
--------
.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h
:doc: overview
HUBP
----
.. kernel-do... | Documentation/gpu/amdgpu/display/dcn-blocks.rst | null | null | null | null | null |
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