# Maintainer: Piotr Gorski <lucjan.lucjanov@gmail.com>
# Contributor: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
# Contributor: Tobias Powalowski <tpowa@archlinux.org>
# Contributor: Thomas Baechler <thomas@archlinux.org>

### BUILD OPTIONS
# Set these variables to ANYTHING that is not null to enable them

### Tweak kernel options prior to a build via nconfig
_makenconfig=

### Tweak kernel options prior to a build via menuconfig
_makemenuconfig=

### Tweak kernel options prior to a build via xconfig
_makexconfig=

### Tweak kernel options prior to a build via gconfig
_makegconfig=

### Running with a 1000 HZ tick rate
_1k_HZ_ticks=y

# NUMA is optimized for multi-socket motherboards.
# A single multi-core CPU actually runs slower with NUMA enabled.
# See, https://bugs.archlinux.org/task/31187
_NUMAdisable=y

# Compile ONLY used modules to VASTLYreduce the number of modules built
# and the build time.
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db script a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD read the database kept if it exists
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
_localmodcfg=

# Use the current kernel's .config file
# Enabling this option will use the .config of the RUNNING kernel rather than
# the ARCH defaults. Useful when the package gets updated and you already went
# through the trouble of customizing your config options.  NOT recommended when
# a new kernel is released, but again, convenient for package bumps.
_use_current=

### Do not edit below this line unless you know what you're doing

pkgbase=linux-rt-bfq
# pkgname=('linux-rt-bfq' 'linux-rt-bfq-headers' 'linux-rt-bfq-docs')
_major=5.4
_minor=19
_rtver=11
_rtpatchver=rt${_rtver}
pkgver=${_major}.${_minor}.${_rtpatchver}
_pkgver=${_major}.${_minor}
_srcname=linux-${_pkgver}
pkgrel=1
pkgdesc='Linux RT-BFQ-dev'
arch=('x86_64')
url="https://github.com/sirlucjan/bfq-mq-lucjan"
license=('GPL2')
options=('!strip')
makedepends=('kmod' 'bc' 'libelf' 'python-sphinx' 'python-sphinx_rtd_theme'
             'graphviz' 'imagemagick')
#_lucjanpath="https://raw.githubusercontent.com/sirlucjan/kernel-patches/master/${_major}"
_lucjanpath="https://gitlab.com/sirlucjan/kernel-patches/raw/master/${_major}"
_bfq_path="bfq-dev-lucjan"
_bfq_ver="v11"
_bfq_rel="r2K200203"
_bfq_patch="${_major}-${_bfq_path}-${_bfq_ver}-${_bfq_rel}.patch"
_gcc_path="https://raw.githubusercontent.com/graysky2/kernel_gcc_patch/master"
_gcc_patch="enable_additional_cpu_optimizations_for_gcc_v9.1+_kernel_v4.13+.patch"

source=("https://www.kernel.org/pub/linux/kernel/v5.x/${_srcname}.tar.xz"
        "https://www.kernel.org/pub/linux/kernel/v5.x/${_srcname}.tar.sign"
        "http://www.kernel.org/pub/linux/kernel/projects/rt/${_major}/patch-${_pkgver}-${_rtpatchver}.patch.xz"
        "http://www.kernel.org/pub/linux/kernel/projects/rt/${_major}/patch-${_pkgver}-${_rtpatchver}.patch.sign"
        "${_lucjanpath}/${_bfq_path}/${_bfq_patch}"
        "${_gcc_path}/${_gcc_patch}"
        "${_lucjanpath}/arch-patches-v24-sep/0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch"
        "${_lucjanpath}/arch-patches-v24-sep/0002-lib-devres-add-a-helper-function-for-ioremap_uc.patch"
        "${_lucjanpath}/arch-patches-v24-sep/0003-mfd-intel-lpss-Use-devm_ioremap_uc-for-MMIO.patch"
        "${_lucjanpath}/arch-patches-v24-sep/0004-PCI-pciehp-Prevent-deadlock-on-disconnect.patch"
        "${_lucjanpath}/arch-patches-v24-sep/0005-ACPI-PM-s2idle-Rework-ACPI-events-synchronization.patch"
        "${_lucjanpath}/arch-patches-v24-sep/0006-iwlwifi-pcie-restore-support-for-Killer-Qu-C0-NICs.patch"
        "${_lucjanpath}/arch-patches-v24-sep/0007-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-s.patch"
        "${_lucjanpath}/arch-patches-v24-sep/0008-drm-i915-Fix-audio-power-up-sequence-for-gen10-displ.patch"
        "${_lucjanpath}/arch-patches-v24-sep/0009-drm-i915-extend-audio-CDCLK-2-BCLK-constraint-to-mor.patch"
        "${_lucjanpath}/arch-patches-v24-sep/0010-drm-i915-Limit-audio-CDCLK-2-BCLK-constraint-back-to.patch"
        "${_lucjanpath}/arch-patches-v24-sep/0011-drm-amdgpu-Add-DC-feature-mask-to-disable-fractional.patch"
         # the main kernel config files
        'config')

export KBUILD_BUILD_HOST=archlinux
export KBUILD_BUILD_USER=$pkgbase
export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"

prepare() {
    cd $_srcname

    ### Add rt patch
        echo "Add rt patch"
        patch -Np1 -i ../patch-${_pkgver}-${_rtpatchver}.patch

    ### Setting version
        echo "Setting version..."
        scripts/setlocalversion --save-scmversion
        echo "-$pkgrel" > localversion.10-pkgrel
        echo "${pkgbase#linux}" > localversion.20-pkgname

    ### Patching sources
        local src
        for src in "${source[@]}"; do
            src="${src%%::*}"
            src="${src##*/}"
            [[ $src = *.patch ]] || continue
        echo "Applying patch $src..."
        patch -Np1 < "../$src"
        done

    ### Setting config
        echo "Setting config..."
        cp ../config .config
        make olddefconfig

    ### Prepared version
        make -s kernelrelease > version
        echo "Prepared $pkgbase version $(<version)"

    ### Optionally use running kernel's config
	# code originally by nous; http://aur.archlinux.org/packages.php?ID=40191
	if [ -n "$_use_current" ]; then
		if [[ -s /proc/config.gz ]]; then
			echo "Extracting config from /proc/config.gz..."
			# modprobe configs
			zcat /proc/config.gz > ./.config
		else
			warning "Your kernel was not compiled with IKCONFIG_PROC!"
			warning "You cannot read the current config!"
			warning "Aborting!"
			exit
		fi
	fi

    ### Optionally set tickrate to 1000
	if [ -n "$_1k_HZ_ticks" ]; then
		echo "Setting tick rate to 1k..."
		sed -i -e 's/^CONFIG_HZ_300=y/# CONFIG_HZ_300 is not set/' \
                    -i -e 's/^# CONFIG_HZ_1000 is not set/CONFIG_HZ_1000=y/' \
                    -i -e 's/^CONFIG_HZ=300/CONFIG_HZ=1000/' ./.config
	fi

    ### Optionally disable NUMA for 64-bit kernels only
        # (x86 kernels do not support NUMA)
        if [ -n "$_NUMAdisable" ]; then
            echo "Disabling NUMA from kernel config..."
            sed -i -e 's/CONFIG_NUMA=y/# CONFIG_NUMA is not set/' \
                -i -e '/CONFIG_AMD_NUMA=y/d' \
                -i -e '/CONFIG_X86_64_ACPI_NUMA=y/d' \
                -i -e '/CONFIG_NODES_SPAN_OTHER_NODES=y/d' \
                -i -e '/# CONFIG_NUMA_EMU is not set/d' \
                -i -e '/CONFIG_NODES_SHIFT=6/d' \
                -i -e '/CONFIG_NEED_MULTIPLE_NODES=y/d' \
                -i -e '/# CONFIG_MOVABLE_NODE is not set/d' \
                -i -e '/CONFIG_USE_PERCPU_NUMA_NODE_ID=y/d' \
                -i -e '/CONFIG_ACPI_NUMA=y/d' ./.config
        fi

    ### Optionally load needed modules for the make localmodconfig
        # See https://aur.archlinux.org/packages/modprobed-db
        if [ -n "$_localmodcfg" ]; then
            if [ -f $HOME/.config/modprobed.db ]; then
            echo "Running Steven Rostedt's make localmodconfig now"
            make LSMOD=$HOME/.config/modprobed.db localmodconfig
        else
            echo "No modprobed.db data found"
            exit
            fi
        fi

    ### Running make nconfig
	[[ -z "$_makenconfig" ]] ||  make nconfig

    ### Running make menuconfig
	[[ -z "$_makemenuconfig" ]] || make menuconfig

    ### Running make xconfig
	[[ -z "$_makexconfig" ]] || make xconfig

    ### Running make gconfig
	[[ -z "$_makegconfig" ]] || make gconfig

    ### Save configuration for later reuse
	cat .config > "${startdir}/config.last"
}

build() {
  cd $_srcname

  make bzImage modules htmldocs
}

_package() {
    pkgdesc="The $pkgdesc kernel and modules"
    depends=('coreutils' 'kmod' 'initramfs')
    optdepends=('crda: to set the correct wireless channels of your country'
                'linux-firmware: firmware images needed for some devices'
                'modprobed-db: Keeps track of EVERY kernel module that has ever been probed - useful for those of us who make localmodconfig')

  cd $_srcname
  local kernver="$(<version)"
  local modulesdir="$pkgdir/usr/lib/modules/$kernver"

  echo "Installing boot image..."
  # systemd expects to find the kernel here to allow hibernation
  # https://github.com/systemd/systemd/commit/edda44605f06a41fb86b7ab8128dcf99161d2344
  install -Dm644 "$(make -s image_name)" "$modulesdir/vmlinuz"

  # Used by mkinitcpio to name the kernel
  echo "$pkgbase" | install -Dm644 /dev/stdin "$modulesdir/pkgbase"

  echo "Installing modules..."
  make INSTALL_MOD_PATH="$pkgdir/usr" modules_install

  # remove build and source links
  rm "$modulesdir"/{source,build}

  echo "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}

_package-headers() {
    pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
    depends=('linux-rt-bfq')

  cd $_srcname
  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"

  echo "Installing build files..."
  install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
    localversion.* version vmlinux
  install -Dt "$builddir/kernel" -m644 kernel/Makefile
  install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile
  cp -t "$builddir" -a scripts

  # add objtool for external module building and enabled VALIDATION_STACK option
  install -Dt "$builddir/tools/objtool" tools/objtool/objtool

  # add xfs and shmem for aufs building
  mkdir -p "$builddir"/{fs/xfs,mm}

  echo "Installing headers..."
  cp -t "$builddir" -a include
  cp -t "$builddir/arch/x86" -a arch/x86/include
  install -Dt "$builddir/arch/x86/kernel" -m644 arch/x86/kernel/asm-offsets.s

  install -Dt "$builddir/drivers/md" -m644 drivers/md/*.h
  install -Dt "$builddir/net/mac80211" -m644 net/mac80211/*.h

  # http://bugs.archlinux.org/task/13146
  install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h

  # http://bugs.archlinux.org/task/20402
  install -Dt "$builddir/drivers/media/usb/dvb-usb" -m644 drivers/media/usb/dvb-usb/*.h
  install -Dt "$builddir/drivers/media/dvb-frontends" -m644 drivers/media/dvb-frontends/*.h
  install -Dt "$builddir/drivers/media/tuners" -m644 drivers/media/tuners/*.h

  echo "Installing KConfig files..."
  find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;

  echo "Removing unneeded architectures..."
  local arch
  for arch in "$builddir"/arch/*/; do
    [[ $arch = */x86/ ]] && continue
    echo "Removing $(basename "$arch")"
    rm -r "$arch"
  done

  echo "Removing documentation..."
  rm -r "$builddir/Documentation"

  echo "Removing broken symlinks..."
  find -L "$builddir" -type l -printf 'Removing %P\n' -delete

  echo "Removing loose objects..."
  find "$builddir" -type f -name '*.o' -printf 'Removing %P\n' -delete

  echo "Stripping build tools..."
  local file
  while read -rd '' file; do
    case "$(file -bi "$file")" in
      application/x-sharedlib\;*)      # Libraries (.so)
        strip -v $STRIP_SHARED "$file" ;;
      application/x-archive\;*)        # Libraries (.a)
        strip -v $STRIP_STATIC "$file" ;;
      application/x-executable\;*)     # Binaries
        strip -v $STRIP_BINARIES "$file" ;;
      application/x-pie-executable\;*) # Relocatable binaries
        strip -v $STRIP_SHARED "$file" ;;
    esac
  done < <(find "$builddir" -type f -perm -u+x ! -name vmlinux -print0)

  echo "Adding symlink..."
  mkdir -p "$pkgdir/usr/src"
  ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase"

  echo "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}

_package-docs() {
    pkgdesc="Documentation for the $pkgdesc kernel"
    depends=('linux-rt-bfq')

  cd $_srcname
  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"

  echo "Installing documentation..."
  local src dst
  while read -rd '' src; do
    dst="${src#Documentation/}"
    dst="$builddir/Documentation/${dst#output/}"
    install -Dm644 "$src" "$dst"
  done < <(find Documentation -name '.*' -prune -o ! -type d -print0)

  echo "Adding symlink..."
  mkdir -p "$pkgdir/usr/share/doc"
  ln -sr "$builddir/Documentation" "$pkgdir/usr/share/doc/$pkgbase"

  echo "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}

pkgname=("$pkgbase" "$pkgbase-headers" "$pkgbase-docs")
for _p in "${pkgname[@]}"; do
  eval "package_$_p() {
    $(declare -f "_package${_p#$pkgbase}")
    _package${_p#$pkgbase}
  }"
done

sha512sums=('f122ee2baf31c4af6e6c727116558ef535d824fd893b80944f3272a32aa33c699be692c19b6a7333a4fbe93e706dca1f1b5ab3c918d9c9fa690daee42e2185e6'
            'SKIP'
            '34c5bc4af3073b813c4767f6e78094ee601168fbfc08683ea7c7cc384801a34337a093b1fc730068b391eeebe34338d1056e7f8fbe4ddb8bf11f34750513abf3'
            'SKIP'
            '43fd3c3c5870f9fc83208580839c2726dbec2b0e8341e336bd5ac981a87f8b934f0b060eb1c675fa279abe078776380b27de690d72081ed547779e765b098ad1'
            '2eb574fbfac6e334d3b06e52e466dbf8e88034515729b6571990b10f75a0fe2a52f188615405c5a695b5820669e595deead44d7961a97c5872359be3435fdf63'
            '0312192cd80f65a85a1aec8d9c1087ed7bcc12ac7bbb1b5185e212915dc3b1cc0ff98abf6ecc78de46d1cd36d2bec04ac3687910e33253c2388692ea335877c1'
            'eb2877dcde10739e607e34d69c92dbf47d07e3a55885d6069fffbadc43004d684e4a0ca01644732e517f0c9dc8434a808f3908caf0371170f0eb5fd4ae78274c'
            'b7bf703bdeb224fb067b5652ad0974ab3ec0b8b47f5af1e5ef29befcc5cab56f33b02aba22155a0dfd45747395fac3078bdfc62f8c853b160c0a02a8e25f629a'
            '689842289136e2db88f8c8556b8cffce5c914bbef864a9cc34020b10deee79929953fe48e6283ce70a8b80d486ce3388834f29cadbdf31b0952b7a768474b0f4'
            '0cc9ab098e8904e668162750588fc5ecc727b0c87f9709bc2f85e3510bd46d6b60059395ddc1a2fc3f70dd37e8f9f500ee0e1ebfdb8c5e072cc367ddb432cd68'
            'a274ca2648df4e59e403a3f94933121ff4bfc7f264aea51bba94e207fc2327fa9578f7ad6dfa6e38ab96e071ef7779b75d0c297dca52c927d0fe5ca1b9f9fcec'
            '0d5c16f88634c61f78629e3088a531fca67566792672743665290c0775a73d867b4f835e35dfd4af60df60ac6e5d152a611adeba181eea454b64a517dfd5254d'
            '8519decb9727617e3dfc0be299abd521d7f6b322fa8f43b7ffd21d172d86a94370beb85b01aaef2c9da070f60492b923060262fabefba6d5093f25485aa6f56c'
            '16dfc6c3ea1c8a4979f34f8b269baf7f3f24fb63821cf42ef29e3ece5a0286907f1a7e6173fbf88c807cc91c630caa68c033067a411845a1350618da7cd37a3e'
            'e05deb50797421b409b87ca3cb480f88085fab34fba4955043c572146dbe46e6328b70fc12bdc62ff0abf481e65fc899a30b63a94d904f7b25c572f6c2230b7b'
            '29755566b4a542442ae3b5c1d97e972d6f4674c283686860ac23378cc97fd643ea8cecb7a8588e169d3dc1ea646f37d384940c6f5c7c1281d5f9eee68867478c'
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validpgpkeys=(
              'ABAF11C65A2970B130ABE3C479BE3E4300411886' # Linus Torvalds
              '647F28654894E3BD457199BE38DBBDC86092693E' # Greg Kroah-Hartman
              '64254695FFF0AA4466CC19E67B96E8162A8CF5D1' # Sebastian Andrzej Siewior
              '5ED9A48FC54C0A22D1D0804CEBC26CDB5A56DE73' # Steven Rostedt
              'E644E2F1D45FA0B2EAA02F33109F098506FF0B14' # Thomas Gleixner
              )