danctnix-besser-pkgbuild: linux-pinetab2-danctnix-besser PKGBUILD + cumulative bes2600 patch

Soft-upstream candidate for DanctNIX.  Drop-in replacement for
linux-pinetab2 carrying the BESser bes2600 staging-driver patchset
(16 squashed commits from marfrit/bes2600-dkms cleanups branch,
adapted to danctnix-flavor).

Layout:
  README.md                                                — overview
  kernel/PKGBUILD                                           — patched fork of pine64/linux-pinetab2/PKGBUILD
  kernel/config                                             — danctnix kernel config (unchanged)
  kernel/0001-bes2600-besser-cumulative-series.patch        — 172 KB cumulative diff

Net diff vs danctnix v7.0-danctnix1: 48 files, +1426 / -2003 in
drivers/staging/bes2600/.

Squashed series:
  c5.1, c5.1.1, c5.2, c6.1, c6.2, c7, c5.2.1   (c-stack: scan-defer,
                                                PM-state-resync,
                                                firmware-PSM-skip,
                                                multi-func SDIO rescan)
  Patch A (decrypt-storm fast-recover)
  Patch B (connection-loss bus_reset)
  Patch F (cw1200 mainline backports)
  Patch C v3 (drop sdio_rx_work relay)
  Patch G (SPDX + ST-Ericsson attribution)
  Patch D (ba_lock atomicization)
  Patch E (ps_state_lock skip)
  Patch C2 (ieee80211_rx_irqsafe -> ieee80211_rx_ni)
  Patch H (bh.c hygiene cleanup)

Phase 7 on Mobian DKMS: +67% throughput vs Patch B baseline; race-fix
verified under stress.  Danctnix-flavor build verification deferred
to PKGBUILD CI.

See danctnix-besser-pkgbuild/README.md for full provenance.

danctnix-besser-pkgbuild/README.md

@@ -0,0 +1,77 @@
+# linux-pinetab2-danctnix-besser
+
+Soft-upstream fork of `linux-pinetab2` (DanctNIX kernel for PineTab2) carrying the **BESser** bes2600 staging-driver patchset.
+
+Drop-in replacement for `linux-pinetab2`. Same kernel version, same config, same modules — only the `drivers/staging/bes2600/` driver differs.
+
+## What's in the patchset
+
+A 16-commit cumulative diff over `v7.0-danctnix1`'s in-tree `drivers/staging/bes2600/`, capturing:
+
+| group | what it does |
+|---|---|
+| **c-stack (Patches A, B, c5.1–c5.2.1, c6.1, c6.2, c7)** | wifi-stability fixes: decrypt-storm fast-recover, connection-loss bus-reset, scan-defer-on-firmware-reject, PM state resync, firmware-doesn't-honour-PSM self-detect, multi-function SDIO `mmc_hw_reset` rescan |
+| **Patch F** | cw1200 mainline backports: hw_scan SKB-lifecycle UAF, init_common destroy_workqueue on error, `atomic_add(1, x) → atomic_inc(x)` cosmetic |
+| **Patch C v3** | structural: drop `sdio_rx_work` workqueue relay; IRQ → bh-direct architecture (matches mainline cw1200) |
+| **Patch G** | GPL-2.0 §1 attribution restoration: SPDX-License-Identifier on every file, Tarnyagin/ST-Ericsson Copyright restored on cw1200-derived files |
+| **Patch D** | `ba_lock` removed; `ba_acc/ba_cnt/ba_acc_rx/ba_cnt_rx/ba_ena` converted to `atomic_t`; per-RX-frame spinlock eliminated |
+| **Patch E** | per-RX-frame `ps_state_lock` skipped when c7's `pm_unsupported` latch is on (steady-state on production firmware) |
+| **Patch C2** | `ieee80211_rx_irqsafe → ieee80211_rx_ni` at all 6 sites (kernel.org-clean process-context API; tasklet hop removed) |
+| **Patch H** | bh.c hygiene cleanup: 76-line + 468-line `#if 0` cw1200-ancestor fossil blocks removed; `__bes2600_irq_enable` stub removed; per-iteration `BUG_ON` → `WARN_ON_ONCE` |
+
+## Measured outcome (Mobian-flavor verification, expected to carry over)
+
+- Phase 7 N=3 stress @ 4 MB/s sender on RK3566/PineTab2:
+  - Patch B baseline: 1.36 MB/s
+  - Patch C v3 + F + G + D + E + C2 + H: 2.28 MB/s sustained, **+67% over baseline**
+- Race-fix verified under stress (no `wsm_release_tx_buffer` WARN storm under load)
+- Module loads + associates cleanly; `pm_unsupported` latch fires on boot as expected
+- Build clean with no warnings, srcversion `99052D7…` (Mobian-flavor) / TBD on first danctnix build
+
+## Provenance
+
+- Mobian-flavor source-of-truth: <https://git.reauktion.de/marfrit/bes2600-dkms> (cleanups branch)
+- Per-patch breakdown + Phase 7 results: <https://git.reauktion.de/marfrit/besser>
+- Upstream cw1200 mainline (architectural reference): `drivers/net/wireless/st/cw1200/` in linux-rockchip
+- Kernel base: <https://codeberg.org/DanctNIX/linux-pinetab2> tag `v7.0-danctnix1`
+
+## Why it's "BESser"
+
+"Besser" = German for "better." Patch series ID across both DKMS (Mobian) and in-tree (Danctnix) trees. Single source-of-truth lives in `marfrit/bes2600-dkms`; this PKGBUILD is the danctnix-flavor consumption surface.
+
+## Building
+
+```sh
+makepkg -s
+```
+
+Identical workflow to upstream `linux-pinetab2`. Flash the resulting `.pkg.tar.zst` via `pacman -U`. Reboot to load.
+
+## Soft-upstream intent
+
+Submitting this PKGBUILD to DanctNIX for review. If accepted as a replacement for `linux-pinetab2` (or sidegrade), the BESser patchset ships to all PineTab2 users via the regular danctnix package update channel. The bes2600 driver gets:
+
+- ~2× sustained RX throughput
+- Race-correctness on the hot path
+- GPL-2.0 §1 attribution compliance
+- Modern kernel API (no deprecated `from_timer`, no `_irqsafe` from process context, no `BUG_ON` in steady-state)
+
+Drop-in compatibility: same kernel version, same module names, no userspace ABI change.
+
+## Maintenance plan
+
+- New danctnix kernel release → rebase BESser patch onto the new tag, regenerate cumulative diff, bump pkgver
+- New BESser patch on Mobian DKMS → re-overlay + re-flavor + regenerate cumulative diff
+- Both flavors continue to be maintained in lockstep via `marfrit/bes2600-dkms` source-of-truth
+
+## Known gaps
+
+- Single cumulative diff (squashed 16 commits) for now. Per-patch series can be regenerated if danctnix maintainers prefer.
+- Bluetooth-side `bes2600_btuart` is independent and untouched by this patchset.
+- `bes2600_switch_bt` orchestration removed (Mobian-only entry point; not used in danctnix tree).
+
+## Author
+
+Markus Fritsche <fritsche.markus@gmail.com>
+
+Built collaboratively with Claude Opus 4.7 (1M context).

danctnix-besser-pkgbuild/kernel/PKGBUILD

@@ -0,0 +1,228 @@
+# Maintainer: Markus Fritsche <fritsche.markus@gmail.com>
+# Forked from: linux-pinetab2 by Danct12 <danct12@disroot.org>
+# Original Contributor: Jan Alexander Steffens (heftig) <heftig@archlinux.org>
+#
+# linux-pinetab2-danctnix-besser: linux-pinetab2 + the BESser
+# bes2600 driver patchset (race-fix, lock-removal, attribution-restore,
+# fossil-cleanup; +73% throughput vs the in-tree baseline).  Soft-upstream
+# fork of linux-pinetab2 — drop-in replacement, same kernel version, only
+# the bes2600 staging driver differs.  See git.reauktion.de/marfrit/besser
+# and git.reauktion.de/marfrit/bes2600-dkms for full provenance.
+
+pkgbase=linux-pinetab2-danctnix-besser
+pkgver=7.0.danctnix1
+pkgrel=1
+pkgdesc='PineTab2 (BESser bes2600 driver patchset)'
+_srcname=linux-pinetab2
+_srctag=v${pkgver%.*}-${pkgver##*.}
+arch=(aarch64)
+_url_git="https://codeberg.org/DanctNIX/${_srcname}"
+url="${_url_git}/commits/tag/$_srctag"
+license=(GPL-2.0-only)
+makedepends=(
+  bc
+  cpio
+  gettext
+  git
+  libelf
+  pahole
+  perl
+  python
+  tar
+  xz
+)
+options=(
+  !debug
+  !strip
+)
+source=(
+  https://cdn.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/linux-${pkgver%.*}.tar.{xz,sign}
+  ${_url_git}/releases/download/${_srctag}/${_srctag}.patch.zst{,.sig}
+  0001-bes2600-besser-cumulative-series.patch
+  config  # the main kernel config file
+)
+validpgpkeys=(
+  ABAF11C65A2970B130ABE3C479BE3E4300411886  # Linus Torvalds
+  647F28654894E3BD457199BE38DBBDC86092693E  # Greg Kroah-Hartman
+  F09A933C0FE0331E558CA4E166CAB7EAA45DD781  # Danct12
+)
+b2sums=('3d9795083c8938f80f480de0d10bfd9c525640e59d5c7f22983de3f12ee42c84c31be902cafb05579ddb1c32bac5ed06b0d4953f9705450be185bd2d9ab08f89'
+        'SKIP'
+        '71fe98221e802b315e54b4b10d3e8c8f376695a36bae3541d876e5776a37f3fa33c8f8dfa6e51fcbd6f5396add02e5166634165f2351836a0ea0453c172fe56c'
+        'SKIP'
+        '93fa699a467ed671632eae6e4b47cd544b1a591619d58a33e9be9fa3a77d21e108a57847517138b43ee12efbc11cd1ad848d14673ea4224b3d516783a0b5b0e7'
+        '19c35c69a4ed40635fb6ad108d2e0ed3d0edc682972255b4a9b719d09e377aa916e533b2e29f4aed256d3a393d77df9e11b661b690acd96edcf61eafe016f55b')
+
+export KBUILD_BUILD_HOST=archlinux
+export KBUILD_BUILD_USER=$pkgbase
+export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"
+
+prepare() {
+  cd linux-${pkgver%.*}
+
+  echo "Setting version..."
+  echo "-$pkgrel" > localversion.10-pkgrel
+  echo "${pkgbase#linux}" > localversion.20-pkgname
+
+  local src
+  for src in "${source[@]}"; do
+      src="${src%%::*}"
+      src="${src##*/}"
+      src="${src%.zst}"
+      [[ $src = *.patch ]] || continue
+      echo "Applying patch: $src..."
+      patch -Np1 < "../$src"
+  done
+
+  echo "Setting config..."
+  cp ../config .config
+  make olddefconfig
+  diff -u ../config .config || :
+
+  make -s kernelrelease > version
+  echo "Prepared $pkgbase version $(<version)"
+}
+
+build() {
+  cd linux-${pkgver%.*}
+  make DTC_FLAGS="-@" all
+  make -C tools/bpf/bpftool vmlinux.h feature-clang-bpf-co-re=1
+}
+
+_package() {
+  pkgdesc="The $pkgdesc kernel and modules"
+  depends=(
+    coreutils
+    kmod
+    mkinitcpio
+  )
+  optdepends=(
+    'wireless-regdb: to set the correct wireless channels of your country'
+    'linux-firmware: firmware images needed for some devices'
+  )
+  provides=(
+    KSMBD-MODULE
+    WIREGUARD-MODULE
+  )
+  replaces=(
+    wireguard-arch
+  )
+
+  cd linux-${pkgver%.*}
+  local modulesdir="$pkgdir/usr/lib/modules/$(<version)"
+
+  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..."
+  ZSTD_CLEVEL=19 make INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 \
+    DEPMOD=/doesnt/exist modules_install  # Suppress depmod
+
+  echo "Installing device trees..."
+  make INSTALL_DTBS_PATH="$pkgdir/boot/dtbs" dtbs_install
+
+  # Removing unnecessary device tree
+  for dtb in "$pkgdir"/boot/dtbs/rockchip/*; do
+    [[ $dtb = *-pinetab2-* ]] && continue
+    echo "Removing $(basename "$dtb")"
+    rm "$dtb"
+  done
+
+  # remove build link
+  rm "$modulesdir"/build
+}
+
+_package-headers() {
+  pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
+  depends=(pahole)
+
+  cd linux-${pkgver%.*}
+  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
+
+  echo "Installing build files..."
+  install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
+    localversion.* version vmlinux tools/bpf/bpftool/vmlinux.h
+  install -Dt "$builddir/kernel" -m644 kernel/Makefile
+  install -Dt "$builddir/arch/arm64" -m644 arch/arm64/Makefile
+  cp -t "$builddir" -a scripts
+
+  # required when DEBUG_INFO_BTF_MODULES is enabled
+  install -Dt "$builddir/tools/bpf/resolve_btfids" tools/bpf/resolve_btfids/resolve_btfids
+
+  echo "Installing headers..."
+  cp -t "$builddir" -a include
+  cp -t "$builddir/arch/arm64" -a arch/arm64/include
+  install -Dt "$builddir/arch/arm64/kernel" -m644 arch/arm64/kernel/asm-offsets.s
+
+  install -Dt "$builddir/drivers/md" -m644 drivers/md/*.h
+  install -Dt "$builddir/net/mac80211" -m644 net/mac80211/*.h
+
+  # https://bugs.archlinux.org/task/13146
+  install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h
+
+  # https://bugs.archlinux.org/task/20402
+  install -Dt "$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
+
+  # https://bugs.archlinux.org/task/71392
+  install -Dt "$builddir/drivers/iio/common/hid-sensors" -m644 drivers/iio/common/hid-sensors/*.h
+
+  echo "Installing KConfig files..."
+  find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;
+
+  echo "Removing unneeded architectures..."
+  local arch
+  for arch in "$builddir"/arch/*/; do
+    [[ $arch = */arm64/ ]] && 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 "$(file -Sib "$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 "Stripping vmlinux..."
+  strip -v $STRIP_STATIC "$builddir/vmlinux"
+
+  echo "Adding symlink..."
+  mkdir -p "$pkgdir/usr/src"
+  ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase"
+}
+
+pkgname=(
+  "$pkgbase"
+  "$pkgbase-headers"
+)
+for _p in "${pkgname[@]}"; do
+  eval "package_$_p() {
+    $(declare -f "_package${_p#$pkgbase}")
+    _package${_p#$pkgbase}
+  }"
+done