Files
nix-config/packages/fastflowlm/default.nix
2026-04-05 19:10:23 -05:00

975 lines
29 KiB
Nix

{
lib,
stdenv,
fetchFromGitHub,
cmake,
ninja,
pkg-config,
rustPlatform,
cargo,
rustc,
# C++ build-time dependencies
boost,
curl,
openssl,
fftw,
fftwFloat, # fftw3f (single-precision)
fftwLongDouble, # fftw3l (long-double-precision)
ffmpeg,
readline,
libdrm,
libuuid,
# ELF patching for the bundled proprietary .so files
autoPatchelfHook,
patchelf,
gcc-unwrapped,
# Access to other flake packages (packages/xrt)
pkgs,
namespace,
}:
# FastFlowLM (FLM) — Ollama-style LLM runtime for AMD Ryzen AI (XDNA 2) NPUs.
#
# Build overview
# ==============
# The repository contains:
# src/ C++20 CMake project → produces the `flm` binary
# third_party/
# tokenizers-cpp/ git submodule — builds tokenizers_cpp (C++) +
# libtokenizers_c.a (Rust staticlib via cargo)
# src/lib/*.so Proprietary NPU kernel libraries (pre-built, bundled)
# src/xclbins/ AIE bitstreams (pre-built, loaded at runtime by .so)
# src/model_list.json Model registry
#
# Runtime prerequisites (managed outside this package):
# • Linux >= 6.14 with amdxdna in-tree driver, or amdxdna-dkms on older
# kernels
# • linux-firmware >= 20260221 (NPU firmware >= 1.1.0.0)
# • Memlock = unlimited for the FLM process
# • packages/xrt (libxrt_coreutil) built and available
#
# To update to a new release
# ==========================
# 1. Bump `version` below.
# 2. Update `srcHash` (run: nix-prefetch-git --url ...FastFlowLM --rev v<X>).
# 3. If the tokenizers-cpp submodule rev changed (check .gitmodules / git
# submodule status), update `tokenizersRev` and `tokenizersHash`:
# nix-prefetch-git --url .../tokenizers-cpp --rev <REV> --fetch-submodules
# 4. If tokenizers changes, regenerate cargoLockContents by running:
# nix shell nixpkgs#cargo --command sh -c \
# 'cp third_party/tokenizers-cpp/rust/Cargo.toml . && \
# cp third_party/tokenizers-cpp/rust/src src -r && \
# cargo generate-lockfile && cat Cargo.lock'
# and replace the cargoLockContents string below.
let
version = "0.9.36";
# XRT userspace runtime — built from packages/xrt in this flake.
inherit (pkgs.${namespace}) xrt;
# ── tokenizers-cpp submodule ──────────────────────────────────────────────
# Pinned to the commit referenced in FastFlowLM v0.9.36 .gitmodules.
tokenizersRev = "34885cfd7b9ef27b859c28a41e71413dd31926f5";
tokenizers-cpp-src = fetchFromGitHub {
owner = "mlc-ai";
repo = "tokenizers-cpp";
rev = tokenizersRev;
# Includes sentencepiece + msgpack sub-submodules.
hash = "sha256-m3A9OhCXJgvvV9UbVL/ijaUC1zkLHlddnQLqZEA5t4w=";
fetchSubmodules = true;
};
# tokenizers-cpp/rust/Cargo.toml has no Cargo.lock (it's a library crate).
# We embed a generated lock file so rustPlatform.importCargoLock can vendor
# the deps offline without needing network access in the main build sandbox.
#
# Generated with:
# nix shell nixpkgs#cargo --command cargo generate-lockfile
# inside a directory containing Cargo.toml with the same dependencies.
cargoLockContents = ''
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 4
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"dary_heap",
"derive_builder",
"esaxx-rs",
"getrandom",
"itertools",
"log",
"macro_rules_attribute",
"monostate",
"onig",
"paste",
"rand",
"rayon",
"rayon-cond",
"regex",
"regex-syntax",
"serde",
"serde_json",
"spm_precompiled",
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'';
# Build the cargo vendor directory from the embedded lock file.
# importCargoLock handles projects without a committed Cargo.lock by
# accepting the lock contents directly.
cargoVendorDir = rustPlatform.importCargoLock {
lockFileContents = cargoLockContents;
};
in
stdenv.mkDerivation rec {
pname = "fastflowlm";
inherit version;
src = fetchFromGitHub {
owner = "FastFlowLM";
repo = "FastFlowLM";
rev = "v${version}";
# We do NOT fetch submodules here — tokenizers-cpp is injected separately
# (above) so that its Rust deps can be vendored in a fixed-output derivation.
hash = "sha256-f/Q5lTplu2umMrTaLN3pgdmkPEMgrDIu7eoMZ3ZogO0=";
};
nativeBuildInputs = [
cmake
ninja
pkg-config
cargo
rustc
autoPatchelfHook
patchelf
];
buildInputs = [
boost
curl
openssl
fftw
fftwFloat
fftwLongDouble
ffmpeg
readline
libdrm
libuuid
xrt
# libstdc++ / libgcc_s needed at runtime by the bundled NPU .so files.
gcc-unwrapped.lib
];
# autoPatchelfHook uses runtimeDependencies to add NEEDED entries to the
# ELF RPATH, covering libraries that the bundled .so files depend on.
runtimeDependencies = [
xrt
gcc-unwrapped.lib
fftw
fftwFloat
fftwLongDouble
ffmpeg
curl
openssl
boost
readline
libdrm
];
# CMakeLists.txt lives in src/, not the repo root.
# The cmake hook runs from a build/ subdirectory, so ../src resolves to
# $sourceRoot/src where the actual CMakeLists.txt lives.
cmakeDir = "../src";
preConfigure = ''
# 1. Populate the tokenizers-cpp submodule directory
# CMakeLists.txt references it as:
# add_subdirectory(''${CMAKE_SOURCE_DIR}/../third_party/tokenizers-cpp ...)
mkdir -p third_party/tokenizers-cpp
cp -r --no-preserve=mode,ownership "${tokenizers-cpp-src}/." \
third_party/tokenizers-cpp/
# 2. Write Cargo.lock (tokenizers-cpp omits it; it's a library crate)
cat > third_party/tokenizers-cpp/rust/Cargo.lock << 'CARGOLOCK'
${cargoLockContents}
CARGOLOCK
# 3. Point cargo at the pre-vendored crates (offline build)
mkdir -p third_party/tokenizers-cpp/rust/.cargo
cat > third_party/tokenizers-cpp/rust/.cargo/config.toml << EOF
[source.crates-io]
replace-with = "vendored-sources"
[source.vendored-sources]
directory = "${cargoVendorDir}"
EOF
'';
cmakeFlags = [
# The build system requires these two version strings (checked at configure).
"-DFLM_VERSION=${version}"
"-DNPU_VERSION=32.0.203.311"
"-DCMAKE_BUILD_TYPE=Release"
# Override the default XRT install prefix (/opt/xilinx/xrt).
"-DXRT_INCLUDE_DIR=${xrt}/include"
"-DXRT_LIB_DIR=${xrt}/lib"
# xclbins/ path baked into the binary via CMAKE_XCLBIN_PREFIX.
"-DCMAKE_XCLBIN_PREFIX=${placeholder "out"}/share/flm"
];
installPhase = ''
runHook preInstall
cmake --install . --prefix "$out"
# Copy bundled proprietary NPU kernel .so files
# The upstream CMakeLists installs them via:
# file(GLOB so_libs "''${CMAKE_SOURCE_DIR}/lib/*.so")
# install(FILES ''${so_libs} DESTINATION lib)
# and sets RPATH=$ORIGIN/../lib on the flm binary.
# We reproduce that layout: $out/lib/lib*.so alongside $out/bin/flm.
mkdir -p "$out/lib"
for so in "$src/src/lib"/lib*.so; do
install -m755 "$so" "$out/lib/"
done
runHook postInstall
'';
# autoPatchelfHook runs automatically and patches the bundled .so files.
# We additionally fix the RPATH on the flm binary to include both:
# • $out/lib (bundled NPU .so files)
# • system libs path (XRT, ffmpeg, boost, …)
postFixup = ''
patchelf \
--set-rpath "${lib.makeLibraryPath buildInputs}:$out/lib" \
"$out/bin/flm"
'';
meta = with lib; {
description = "LLM runtime for AMD Ryzen AI XDNA 2 NPUs";
longDescription = ''
FastFlowLM (FLM) runs large language models on AMD Ryzen AI (XDNA 2)
NPU silicon Strix Point, Strix Halo, Kraken Point, Gorgon Point.
It provides an Ollama-compatible REST API (port 52625) and a CLI.
Models are stored in ~/.config/flm/ by default;
override with the FLM_MODEL_PATH environment variable.
Usage:
flm validate # check NPU driver + firmware health
flm run llama3.2:1b # interactive chat (downloads model on first run)
flm serve llama3.2:1b # OpenAI-compatible server on port 52625
flm list # list available models
flm pull <model> # pre-download a model
System requirements:
Linux >= 6.14 (amdxdna in-tree) or amdxdna-dkms on older kernels
linux-firmware >= 20260221 (NPU firmware >= 1.1.0.0)
Unlimited memlock for the flm process, e.g. in NixOS:
security.pam.loginLimits = [{
domain = "*"; type = "-";
item = "memlock"; value = "unlimited";
}];
License note: CLI/orchestration code is MIT. The bundled NPU kernel
shared libraries are proprietary (free for commercial use up to
USD 10 M annual revenue). See LICENSE_BINARY.txt upstream.
'';
homepage = "https://fastflowlm.com";
license = with licenses; [
mit
unfreeRedistributable
];
mainProgram = "flm";
platforms = [ "x86_64-linux" ];
maintainers = [ ];
};
}