mirror of
https://github.com/Zeckmathederg/glfs.git
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208 lines
7.3 KiB
XML
208 lines
7.3 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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]>
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<sect1 id="gpuconfig" xreflabel="GPU Kernel Options and Firmware">
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<?dbhtml filename="gpuconfig.html"?>
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<title>GPU Kernel Options and Firmware</title>
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<para>
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The Linux kernel has multiple drivers for all sorts of hardware,
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including GPUs, and most open source drivers are in the kernel.
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This includes AMD, i915, and Nouveau. There are other drivers
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as well that can be useful for certain users. Firmware is also
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necessary for many drivers.
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</para>
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<sect2 role="kernel" id="gpu-kernel" xreflabel='GPU Kernel Configuration'>
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<title>Kernel Configuration</title>
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<para>
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The kernel options below enable GPU and virtual GPU drivers.
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Enable the ones you need and recompile the kernel if necessary.
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</para>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="gpuconfig-kernel.xml"/>
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<note>
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<para>
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There are comments for the options above, corresponding with Mesa's
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Gallium3D dri driver names.
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</para>
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<para>
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Selecting <option>CONFIG_DRM_RADEON</option>,
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<option>CONFIG_DRM_AMDGPU</option>, or
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<option>CONFIG_DRM_NOUVEAU</option> as
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<quote><literal>y</literal></quote> is not recommended. If it is, any
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required firmware must be built as a part of the kernel image or the
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initramfs for the driver to function correctly.
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</para>
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<para>
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The sub-entries under <option>CONFIG_DRM_AMDGPU</option> are used
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to ensure the AMDGPU kernel driver supports all GPUs using the
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<literal>radeonsi</literal> driver. They are not needed if you
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won't need <option>CONFIG_DRM_AMDGPU</option> itself. They
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may be unneeded for some GPU models.
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</para>
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<para>
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For <literal>swrast</literal>, <option>CONFIG_DRM_VGEM</option>
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is not strictly needed but recommended as an optimization.
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</para>
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</note>
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<indexterm zone="gpuconfig gpu-kernel">
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<primary sortas="d-gpuconfig">gpuconfig</primary>
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</indexterm>
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</sect2>
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<sect2>
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<title>Firmware</title>
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<sect3>
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<title>ATI Firmware</title>
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<para>
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ATI Radeon GPUs require firmware to be able to use KMS (kernel
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modesetting - the preferred option) as well as for Xorg. For
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older Radeon chips before r600, the firmware is in the kernel
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source. Later GPUs have their firmware in <application>
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linux-firmware</application>.
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</para>
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<para>
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In order to save space, it is recommended to use
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<xref linkend="pciutils"/> and it's packaged binary <command>
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lspci</command> to identify what the VGA controller is. After
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you find out that, check the RadeonFeature page of the Xorg
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wiki for
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<ulink url="https://wiki.x.org/wiki/RadeonFeature/#index5h2">
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Decoder ring for engineering vs marketing names</ulink> to
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identify the family (you may need to know this for the Xorg
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driver — Southern Islands and Sea Islands use the radeonsi
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driver) and the specific model.
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</para>
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<para>
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Now that you know which controller you are using, consult the
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<ulink url="https://wiki.gentoo.org/wiki/Radeon#Firmware">
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Radeon Firmware</ulink> page of the Gentoo wiki which has a
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table listing the required firmware blobs for the various
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chipsets. Note that Southern Islands and Sea Islands chips
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use different firmware for kernel 3.17 and later compared to
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earlier kernels. Identify and download the required blobs
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then install them:
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</para>
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<screen><userinput>mkdir -pv /lib/firmware/radeon
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cp -v <YOUR_BLOBS> /lib/firmware/radeon</userinput></screen>
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</sect3>
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<sect3>
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<title>RadeonSI Firmware</title>
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<para>
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AMDGPU devices require firmware in order to be used in general.
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Install <xref linkend="pciutils"/> to check the model name of
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your card, and look for 'VGA compatible controller:'. If you have
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an APU (Accelerated Processing Unit, i.e. CPU and video on the same
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chip) that will probably tell you the name. If you have a separate
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amdgpu video card you will need to search to determine which name it
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uses (e.g. a card described as Advanced Micro Devices, Inc. [AMD/ATI]
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Baffin [Radeon RX 550 640SP / RX 560/560X] need Polaris11 firmware.
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There is a table of "Family, Chipset name, Product name and Firmware"
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at the end of the Kernel sections in <ulink
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url="https://wiki.gentoo.org/wiki/AMDGPU#Known_firmware_blobs">AMDGPU
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</ulink> page of the Gentoo wiki.
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</para>
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<para>
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Once you have identified the firmware name, install all the relevant
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files for it. For example, the Baffin card mentioned above has 21
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different polaris11* files, APUs such as renoir and picasso have at
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least 12 files and might gain more in future updates (e.g. the raven
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APU now has a 13th file, raven_ta.bin).
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</para>
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<screen><userinput>mkdir -pv /lib/firmware/amdgpu
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cp -v <YOUR_BLOBS> /lib/firmware/amdgpu</userinput></screen>
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<para>
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If disk space is not a problem, you could install all the current
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amdgpu firmware files and not worry about exactly which chipset is
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installed.
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</para>
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</sect3>
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<sect3>
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<title>i915 Firmware</title>
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<para>
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Intel integrated GPUs from Skylake onwards can use firmware for
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GuC (the Graphics microcontroller), and also for the HuC
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(HEVC/H265 microcontroller which offloads to the GPU) and the
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DMC (Display Microcontroller) to provide additional low-power
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states. The GuC and HuC have had a chequered history in the
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kernel and updated firmware may be disabled by default,
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depending on your kernel version.Further details may be found at
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<ulink url="https://01.org/linuxgraphics/downloads/firmware/"/> and
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<ulink url="https://wiki.archlinux.org/index.php/intel_graphics"/>.
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</para>
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</sect3>
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<sect3>
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<title>Nouveau Firmware</title>
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<para>
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Nvidia GPUs from Kepler onwards require signed firmware, otherwise
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the nouveau driver is unable to provide hardware acceleration.
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Nvidia has now released firmware up to Ampere (GeForce30 series) to
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<application>linux-firmware</application>. Note that faster clocks
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than the default are not enabled by the released firmware.
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</para>
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<para>
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For older chips, it might be necessary to extract firmware from the
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NVIDIA runfile directly:
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</para>
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<screen><userinput>wget https://anduin.linuxfromscratch.org/BLFS/nvidia-firmware/extract_firmware.py
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wget https://us.download.nvidia.com/XFree86/Linux-x86/340.32/NVIDIA-Linux-x86-340.32.run
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sh NVIDIA-Linux-x86-340.32.run --extract-only
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python3 extract_firmware.py
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mkdir -p /lib/firmware/nouveau
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cp -d nv* vuc-* /lib/firmware/nouveau/</userinput></screen>
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<para>
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For newer chips, the nouveau driver searches in multiple paths,
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and simply grabbing firmware you find in the linux-firmware repository
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won't do any good probably. There are plenty of symlinks that need to
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be made. Follow the instructions below in order to install the newer
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firmware properly:
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</para>
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<screen><userinput>git clone https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/
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cd linux-firmware
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mkdir -pv /lib/firmware/nvidia
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mkdir -pv DESTDIR/lib/firmware
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sh copy-firmware.sh --ignore-duplicates DESTDIR/lib/firmware
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cp -vr DESTDIR/lib/firmware/nvidia/* /lib/firmware/nvidia
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rm -rf DESTDIR</userinput></screen>
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</sect3>
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</sect2>
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</sect1>
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