ci/freedreno: Switch the fastboot boards to using nfsroot.

This saves time in packing the rootfs, allows for larger rootfses, and
avoids the need for webdav.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9314>

.gitlab-ci/bare-metal/fastboot.sh

@@ -45,19 +45,37 @@ if [ -z "$BM_ROOTFS" ]; then
   exit 1
 fi
 
+if echo $BM_CMDLINE | grep -q "root=/dev/nfs"; then
+  BM_FASTBOOT_NFSROOT=1
+fi
+
+if [ -z "$BM_FASTBOOT_NFSROOT" ]; then
   if [ -z "$BM_WEBDAV_IP" -o -z "$BM_WEBDAV_PORT" ]; then
     echo "BM_WEBDAV_IP and/or BM_WEBDAV_PORT is not set - no results will be uploaded from DUT!"
     WEBDAV_CMDLINE=""
   else
     WEBDAV_CMDLINE="webdav=http://$BM_WEBDAV_IP:$BM_WEBDAV_PORT"
   fi
+fi
 
 set -ex
 
 # Clear out any previous run's artifacts.
 rm -rf results/
-mkdir -p results
+mkdir -p results/
 
+if [ -n "$BM_FASTBOOT_NFSROOT" ]; then
+  # Create the rootfs in the NFS directory.  rm to make sure it's in a pristine
+  # state, since it's volume-mounted on the host.
+  rsync -a --delete $BM_ROOTFS/ /nfs/
+  mkdir -p /nfs/results
+  . $BM/rootfs-setup.sh /nfs
+
+  # Root on NFS, no need for an inintramfs.
+  rm -f rootfs.cpio.gz
+  touch rootfs.cpio
+  gzip rootfs.cpio
+else
   # Create the rootfs in a temp dir
   rsync -a --delete $BM_ROOTFS/ rootfs/
   . $BM/rootfs-setup.sh rootfs
@@ -80,6 +98,15 @@ find -H | \
     xz --check=crc32 -T4 - > $CI_PROJECT_DIR/rootfs.cpio.gz
   popd
 
+  # Start nginx to get results from DUT
+  if [ -n "$WEBDAV_CMDLINE" ]; then
+    ln -s `pwd`/results /results
+    sed -i s/80/$BM_WEBDAV_PORT/g /etc/nginx/sites-enabled/default
+    sed -i s/www-data/root/g /etc/nginx/nginx.conf
+    nginx
+  fi
+fi
+
 # Make the combined kernel image and dtb for passing to fastboot.  For normal
 # Mesa development, we build the kernel and store it in the docker container
 # that this script is running in.
@@ -108,14 +135,6 @@ abootimg \
   -c cmdline="$BM_CMDLINE $WEBDAV_CMDLINE"
 rm Image.gz-dtb
 
-# Start nginx to get results from DUT
-if [ -n "$WEBDAV_CMDLINE" ]; then
-  ln -s `pwd`/results /results
-  sed -i s/80/$BM_WEBDAV_PORT/g /etc/nginx/sites-enabled/default
-  sed -i s/www-data/root/g /etc/nginx/nginx.conf
-  nginx
-fi
-
 export PATH=$BM:$PATH
 
 # Start background command for talking to serial if we have one.
@@ -127,8 +146,17 @@ if [ -n "$BM_SERIAL_SCRIPT" ]; then
   done
 fi
 
+set +e
 $BM/fastboot_run.py \
   --dev="$BM_SERIAL" \
   --fbserial="$BM_FASTBOOT_SERIAL" \
   --powerup="$BM_POWERUP" \
   --powerdown="$BM_POWERDOWN"
+ret=$?
+set -e
+
+# Bring artifacts back from the NFS dir to the build dir where gitlab-runner
+# will look for them.
+cp -Rp /nfs/results/. results/
+
+exit $ret

src/freedreno/ci/gitlab-ci.yml

@@ -8,6 +8,7 @@
     BM_ROOTFS: /lava-files/rootfs-arm64
     FLAKES_CHANNEL: "#freedreno-ci"
     PIGLIT_PLATFORM: mixed_glx_egl
+    BM_CMDLINE: "ip=dhcp console=ttyMSM0,115200n8 root=/dev/nfs rw nfsrootdebug nfsroot=,tcp,nfsvers=4.2 init=/init $BM_KERNELARGS"
   script:
     - ./install/bare-metal/fastboot.sh
   needs:
@@ -30,7 +31,6 @@
   variables:
     BM_KERNEL: /lava-files/Image.gz
     BM_DTB: /lava-files/apq8016-sbc.dtb
-    BM_CMDLINE: "ip=dhcp console=ttyMSM0,115200n8"
     GPU_VERSION: freedreno-a307
     DEQP_EXPECTED_RENDERER: FD307
 
@@ -68,7 +68,6 @@ a306_gles3_options:
   variables:
     BM_KERNEL: /lava-files/Image.gz
     BM_DTB: /lava-files/apq8096-db820c.dtb
-    BM_CMDLINE: "ip=dhcp console=ttyMSM0,115200n8"
     GPU_VERSION: freedreno-a530
     DEQP_EXPECTED_RENDERER: FD530
   tags: