anv: Improve flushing around STATE_BASE_ADDRESS

It is not clear from the docs exactly how pipelined STATE_BASE_ADDRESS
actually is.  We know from experimentation that we need to flush the
render cache prior to emitting STATE_BASE_ADDRESS and invalidate the
texture cache afterwards.  The only thing the PRM says is that, on gen8+
we're supposed to invalidate the state cache after STATE_BASE_ADDRESS
but experimentation has indicated that doing so does nothing whatsoever.

Since we don't really know, let's do just a bit more flushing in the
hopes that this won't be a problem again.  In particular:

 1) Do a CS stall before we emit STATE_BASE_ADDRESS since we don't
    really know whether or not it's pipelined.

 2) Do a data cache flush in case what runs before STATE_BASE_ADDRESS
    is a compute shader.

 3) Invalidate the state and constant caches after STATE_BASE_ADDRESS
    because the state may be getting cached there (we don't really know).

Reported-by: Mark Janes <[email protected]>
Tested-by: Mark Janes <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
Cc: "13.0 17.0" <[email protected]>

0 files changed, 0 insertions, 0 deletions