panfrost: Share tiler_heap across batches/contexts

There's only one tiler, so this is safe. (The blob does the same
optimization.) This avoids allocating multiple heaps for multiple
batches, which wastes memory and CPU time.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6373>
5 files changed