# bare-metal Mesa testing Testing Mesa with gitlab-runner running on the devices being tested (DUTs) proved to be too unstable, so this set of scripts is for running Mesa testing on bare-metal boards connected to a separate system using gitlab-runner. Currently only "fastboot" and "ChromeOS Servo" devices are supported. In comparison with LAVA, this doesn't involve maintaining a separate webservice with its own job scheduler and replicating jobs between the two. It also places more of the board support in git, instead of webservice configuration. On the other hand, the serial interactions and bootloader support are more primitive. ## Requirements (fastboot) This testing requires power control of the DUTs by the gitlab-runner machine, since this is what we use to reset the system and get back to a pristine state at the start of testing. We require access to the console output from the gitlab-runner system, since that is how we get the final results back from the tests. You should probably have the console on a serial connection, so that you can see bootloader progress. The boards need to be able to have a kernel/initramfs supplied by the gitlab-runner system, since the initramfs is what contains the Mesa testing payload. The boards should have networking, so that (in a future iteration of this code) we can extract the dEQP .xml results to artifacts on gitlab. ## Requirements (servo) For servo-connected boards, we can use the EC connection for power control to reboot the board. However, loading a kernel is not as easy as fastboot, so we assume your bootloader can do TFTP, and that your gitlab-runner mounts the runner's tftp directory specific to the board at /tftp in the container. Since we're going the TFTP route, we also use NFS root. This avoids packing the rootfs and sending it to the board as a ramdisk, which means we can support larger rootfses (for piglit or tracie testing), at the cost of needing more storage on the runner. Telling the board about where its TFTP and NFS should come from is done using dnsmasq on the runner host. For example, this snippet in the dnsmasq.conf.d in the google farm, with the gitlab-runner host we call "servo". ``` dhcp-host=1c:69:7a:0d:a3:d3,10.42.0.10,set:servo # Fixed dhcp addresses for my sanity, and setting a tag for # specializing other DHCP options dhcp-host=a0:ce:c8:c8:d9:5d,10.42.0.11,set:cheza1 dhcp-host=a0:ce:c8:c8:d8:81,10.42.0.12,set:cheza2 # Specify the next server, watch out for the double ',,'. The # filename didn't seem to get picked up by the bootloader, so we use # tftp-unique-root and mount directories like # /srv/tftp/10.42.0.11/jwerner/cheza as /tftp in the job containers. tftp-unique-root dhcp-boot=tag:cheza1,cheza1/vmlinuz,,10.42.0.10 dhcp-boot=tag:cheza2,cheza2/vmlinuz,,10.42.0.10 dhcp-option=tag:cheza1,option:root-path,/srv/nfs/cheza1 dhcp-option=tag:cheza2,option:root-path,/srv/nfs/cheza2 ``` ## Setup Each board will be registered in fd.o gitlab. You'll want something like this to register a fastboot board: ``` sudo gitlab-runner register \ --url https://gitlab.freedesktop.org \ --registration-token $1 \ --name MY_BOARD_NAME \ --tag-list MY_BOARD_TAG \ --executor docker \ --docker-image "alpine:latest" \ --docker-volumes "/dev:/dev" \ --docker-network-mode "host" \ --docker-privileged \ --non-interactive ``` For a servo board, you'll need to also volume mount the board's NFS root dir at /nfs and TFTP kernel directory at /tftp. The registration token has to come from a fd.o gitlab admin going to https://gitlab.freedesktop.org/admin/runners The name scheme for Google's lab is google-freedreno-boardname-n, and our tag is something like google-freedreno-db410c. The tag is what identifies a board type so that board-specific jobs can be dispatched into that pool. We need privileged mode and the /dev bind mount in order to get at the serial console and fastboot USB devices (--device arguments don't apply to devices that show up after container start, which is the case with fastboot, and the servo serial devices are acctually links to /dev/pts). We use host network mode so that we can (in the future) spin up a server to collect XML results for fastboot. Once you've added your boards, you're going to need to add a little more customization in `/etc/gitlab-runner/config.toml`. First, add `concurrent = ` at the top ("we should have up to this many jobs running managed by this gitlab-runner"). Then for each board's runner, set `limit = 1` ("only 1 job served by this board at a time"). Finally, add the board-specific environment variables required by your bare-metal script, something like: ``` [[runners]] name = "google-freedreno-db410c-1" environment = ["BM_SERIAL=/dev/ttyDB410c8", "BM_POWERUP=google-power-up.sh 8", "BM_FASTBOOT_SERIAL=15e9e390"] ``` Once you've updated your runners' configs, restart with `sudo service gitlab-runner restart`