I don't know if this is required - surprisingly, I haven't seen it
matter - but I'd like to use it for multi-slice transfer maps. We may
as well do the right thing.
When we blit, transfer, or copy_resource to a buffer, we need to flush
to ensure any stale data for that buffer is invalidated in the caches.
bind_history will inform us which caches need to be flushed.
Also, for any push constant buffers, we need to flag those dirty so
that we re-emit 3DSTATE_CONSTANT_*, causing the data to be re-pushed.
Size can be too large for a surf, blorp_buffer_copy chops things up
into segments we can actually handle
Fixes map_buffer_range_test and copy_buffer_coherency
some of them had typos, didn't say 'authors or copyright holders',
or other mistakes. This is now https://opensource.org/licenses/MIT
text, formatted consistently.
It just does blits between layers, which is all we'd do anyway,
and it already should use BLORP because of iris_blit(). Plus it
handles 3D, which our code in i965 doesn't.
