Hi everyone,
this series adds support for using sync fences as prefences and postfences for host1x job submissions. The patches are available as a git repository at
https://github.com/cyndis/linux/tree/host1x-fence-1
and testing code is available at
https://github.com/cyndis/host1x_test
though you may want to edit the main function to disable the timeout tests for now as they cause a deadlock (not caused by this series; fix upcoming).
Verified on a Jetson TX1; should go on top of the earlier VIC series.
Some additional points: * I noticed that the waitchk_mask field in the submit UAPI is completely useless, and has never had any effect in the upstream kernel. It has also not existed in the downstream kernel for many years. We could replace it with the flags field if that is deemed acceptable, though of course it is possible there exists some application that fills it with some non-zero value. * Signaling is enabled for all host1x fences, not just those for which enable_signaling has been called. This is because enable_signaling is called from atomic context and we cannot set up an action waiter in atomic context.
Thanks, Mikko
Mikko Perttunen (3): gpu: host1x: Add support for DMA fences drm/tegra: Add sync file support to submit interface drm/tegra: Support for sync file-based fences in submit
drivers/gpu/drm/tegra/drm.c | 69 +++++++++++-- drivers/gpu/host1x/Kconfig | 1 + drivers/gpu/host1x/Makefile | 1 + drivers/gpu/host1x/dev.h | 12 ++- drivers/gpu/host1x/fence.c | 202 +++++++++++++++++++++++++++++++++++++ drivers/gpu/host1x/fence.h | 28 +++++ drivers/gpu/host1x/hw/channel_hw.c | 36 +++++-- drivers/gpu/host1x/intr.c | 11 +- drivers/gpu/host1x/intr.h | 8 +- drivers/gpu/host1x/syncpt.c | 2 + include/linux/host1x.h | 12 ++- include/uapi/drm/tegra_drm.h | 8 +- 12 files changed, 367 insertions(+), 23 deletions(-) create mode 100644 drivers/gpu/host1x/fence.c create mode 100644 drivers/gpu/host1x/fence.h