This implements an undocumented workaround for a hardware bug that
affects draw calls with a pixel shader that has 0 push constant cycles
when TBIMR is enabled, which has been seen to lead to a hang with
Fallout 3 and Metal Gear Rising Revengeance. This hardware bug has
been reported as HSDES#22020184996 which is still pending a resolution
by the hardware team. However since this workaround found empirically
has been confirmed to fix the issue reliably and it's relatively
harmless it seems worth checking in already even though no final W/A
number is available nor has the W/A json file been updated.
To avoid the issue we simply pad the push constant payload to be at
least 1 register. This is enabled via a brw_wm_prog_key since the
driver needs to be in agreement with the compiler on whether the dummy
push constant cycle is present, and it can be avoided in cases where
the driver knows that TBIMR will be disabled (e.g. for BLORP).
Related: https://gitlab.freedesktop.org/mesa/mesa/-/issues/10728
Related: https://gitlab.freedesktop.org/mesa/mesa/-/issues/11399
Fixes: 57decad976 ("intel/xehp: Enable TBIMR by default.")
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30031>
(cherry picked from commit b98eebbcb2)
Sporadically a6xx gpu will fail to recover causing the lava job
a660_vk_full to loop on error messages for three hours before timing
out.
A few sporadic error messages may still be recoverable, but when multiple
errors occur over a short period, successful recovery is unlikely. Parse
the logs to look for repeated error messages within a short time period.
If found, cancel the lava job and rerun it.
Also add unit tests for this behaviour.
cc: mesa-stable
Reported-by: Valentine Burley <valentine.burley@gmail.com>
Acked-by: Daniel Stone <daniel.stone@collabora.com>
Reviewed-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Signed-off-by: Deborah Brouwer <deborah.brouwer@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30032>
(cherry picked from commit 72c182f873)
