nvidia: Add FAN speed (PWM) controller

NVIDIA's Jetpack framework provides a proprietary tool to control the
FAN speed (PWM) on Jetson platforms (specially the developer kit
boards). This commit introduces a FOSS and simplified version of this
tool written from scratch. Initially, two FAN speed profiles are being
provided for Jetson Xavier and Orin platforms: quiet and cool.

Signed-off-by: Renê de Souza Pinto <rene@renesp.com.br>

pkg/nvidia/Dockerfile

@@ -56,6 +56,11 @@ RUN mkdir -p dist
 RUN make cmd-nvidia-ctk && cp nvidia-ctk dist/
 RUN make cmd-nvidia-cdi-hook && cp nvidia-cdi-hook dist/
 
+# Build nvfanctrl
+COPY nvfanctrl/ /nvfanctrl
+WORKDIR /nvfanctrl
+RUN make && mkdir -p dist/ && cp nvfanctrl dist/
+
 # Get and extract ldconfig for glibc, this tool runs over the rootfs of the
 # application container, like CUDA application containers (glibc based).
 ADD http://ports.ubuntu.com/ubuntu-ports/pool/main/g/glibc/libc-bin_2.31-0ubuntu9.16_arm64.deb /
@@ -98,6 +103,7 @@ COPY --from=build /cdi-dist/*.yaml /etc/cdi/
 COPY --from=build /rules.d/* /opt/vendor/nvidia/etc/udev/rules.d/
 COPY --from=build /rootfs-dist/ /opt/vendor/nvidia/dist/
 COPY --from=build /ldconfig-bin/* /opt/vendor/nvidia/bin/
+COPY --from=build /nvfanctrl/dist/* /opt/vendor/nvidia/bin/
 COPY --from=build /nvct/dist/* /opt/vendor/nvidia/bin/
 COPY --from=build /nv-init.sh /opt/vendor/nvidia/init.d/
 

pkg/nvidia/nvfanctrl/Makefile

@@ -0,0 +1,15 @@
+# Copyright (c) 2024 Zededa, Inc.
+# SPDX-License-Identifier: Apache-2.0
+#
+SOURCES=main.go
+BINARY=nvfanctrl
+
+.PHONY: clean
+
+all: $(BINARY)
+
+$(BINARY):$(SOURCES)
+	go build -o $@ $<
+
+clean:
+	rm -f $(BINARY)