qemu: switch to building wireless as kernel modules
This is a hefty change * add support for kernel backports project * build wireless stack/drivers as modules from a backported kernel * create a service to load/unload the modules
This commit is contained in:
Daniel Barlow
166
pkgs/mac80211/default.nix
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166
pkgs/mac80211/default.nix
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@@ -0,0 +1,166 @@
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# make out-of-tree modules given a backported kernel source tree
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{
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extraConfig ? {}
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, drivers ? [ ]
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, kernel-backport
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, stdenv
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, writeText
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, klibBuild ? null
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, buildPackages
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, fetchFromGitHub
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, liminix
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, lib
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}:
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let
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openwrtSrc = fetchFromGitHub {
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name = "openwrt-source";
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repo = "openwrt";
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owner = "openwrt";
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rev = "a5265497a4f6da158e95d6a450cb2cb6dc085cab";
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hash = "sha256-YYi4gkpLjbOK7bM2MGQjAyEBuXJ9JNXoz/JEmYf8xE8=";
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};
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inherit (liminix.services) oneshot longrun;
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inherit (lib.lists) foldl;
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configs = {
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ath9k = {
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WLAN_VENDOR_ATH = "y";
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ATH_COMMON = "m";
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ATH9K = "m";
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ATH9K_AHB = "y";
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# ATH9K_DEBUGFS = "y";
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ATH_DEBUG = "y";
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BACKPORTED_ATH9K_AHB = "y";
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};
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ath10k_pci = {
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WLAN_VENDOR_ATH = "y";
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ATH_COMMON = "m";
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ATH10K = "m";
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# BACKPORTED_ATH10K_AHB = "y";
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# ATH10K_AHB = "y";
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ATH10K_PCI = "y";
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ATH10K_DEBUG = "y";
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};
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rt2800soc = {
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WLAN_VENDOR_RALINK = "y";
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RT2800SOC = "m";
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RT2X00 = "m";
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};
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mt7603e = { # XXX find a better name for this
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WLAN_VENDOR_RALINK = "y";
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WLAN_VENDOR_MEDIATEK = "y";
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MT7603E = "y";
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};
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mac80211_hwsim = {
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MAC80211_HWSIM = "y";
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};
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};
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kconfig = (foldl (config: d: (config // configs.${d})) {
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WLAN = "y";
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CFG80211 = "m";
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MAC80211 = "m";
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# (nixwrt comment) I am reluctant to have to enable this but
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# can't transmit on 5GHz bands without it (they are all marked
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# NO-IR)
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CFG80211_CERTIFICATION_ONUS = "y";
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# (nixwrt comment) can't get signed regdb to work rn, it just
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# gives me "loaded regulatory.db is malformed or signature is
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# missing/invalid"
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CFG80211_REQUIRE_SIGNED_REGDB = "n"; # depends on ONUS
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CFG80211_CRDA_SUPPORT = "n";
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MAC80211_MESH = "y";
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} drivers) // extraConfig;
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writeConfig = name : config: writeText name
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(builtins.concatStringsSep
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"\n"
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(lib.mapAttrsToList
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(name: value: (if value == "n" then "# CPTCFG_${name} is not set" else "CPTCFG_${name}=${value}"))
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config
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));
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kconfigFile = writeConfig "backports_kconfig" kconfig;
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src = kernel-backport;
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CROSS_COMPILE = stdenv.cc.bintools.targetPrefix;
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CC = "${buildPackages.stdenv.cc}/bin/gcc";
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module = stdenv.mkDerivation {
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name = "mac80211";
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inherit src;
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hardeningDisable = ["all"];
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nativeBuildInputs = [buildPackages.stdenv.cc] ++
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(with buildPackages.pkgs;
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[bc bison flex pkgconfig openssl
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which kmod cpio
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]);
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inherit CC CROSS_COMPILE;
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ARCH = "mips"; # kernel uses "mips" here for both mips and mipsel
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dontStrip = true;
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dontPatchELF = true;
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phases = [
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"unpackPhase"
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"patchFromOpenwrt"
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"configurePhase"
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"checkConfigurationPhase"
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"buildPhase"
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"installPhase"
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];
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patchFromOpenwrt = ''
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mac80211=${openwrtSrc}/package/kernel/mac80211
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echo $mac80211
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for i in $(ls $mac80211/patches/build/ | grep -v 015-ipw200); do
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echo $i; (patch -p1 -N <$mac80211/patches/build/$i)
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done
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for i in $(ls $mac80211/patches/rt2x00/ | grep -v 009-rt2x00-don-t | grep -v 013-rt2x00-set-correct | grep -v 014 | grep -v 015 | grep -v 016); do
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echo $i; (patch -p1 -N <$mac80211/patches/rt2x00/$i)
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done
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for i in $mac80211/patches/ath/*; do echo $i; (patch -p1 -N <$i) ;done
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for i in $mac80211/patches/ath9k/*; do echo $i; (patch -p1 -N <$i) ;done
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'';
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configurePhase = ''
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cp ${kconfigFile} .config
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cp ${kconfigFile} .config.orig
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chmod +w .config .config.orig
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make V=1 CC=${CC} SHELL=`type -p bash` LEX=flex KLIB_BUILD=${klibBuild} olddefconfig
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'';
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checkConfigurationPhase = ''
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echo Checking required config items:
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if comm -2 -3 <(awk -F= '/CPTCFG/ {print $1}' ${kconfigFile} |sort) <(awk -F= '/CPTCFG/ {print $1}' .config|sort) |grep '.' ; then
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echo -e "^^^ Some configuration lost :-(\nPerhaps you have mutually incompatible settings, or have disabled options on which these depend.\n"
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exit 0
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fi
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echo "OK"
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'';
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KBUILD_BUILD_HOST = "liminix.builder";
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buildPhase = ''
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patchShebangs scripts/
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echo ${klibBuild}
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make V=1 SHELL=`type -p bash` KLIB_BUILD=${klibBuild} modules
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find . -name \*.ko | xargs ${CROSS_COMPILE}strip --strip-debug
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'';
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installPhase = ''
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mkdir -p $out/lib/modules/0.0
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find . -name \*.ko | cpio --make-directories -p $out/lib/modules/0.0
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depmod -b $out -v 0.0
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touch $out/load.sh
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for i in ${lib.concatStringsSep " " drivers}; do
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modprobe -S 0.0 -d $out --show-depends $i >> $out/load.sh
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done
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tac < $out/load.sh | sed 's/^insmod/rmmod/g' > $out/unload.sh
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'';
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};
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in oneshot {
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name = "wlan.module";
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up = "sh ${module}/load.sh";
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down = "sh {module}/unload.sh";
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}
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