Xe2 replaces auxiliary surface mapping by software to compress buffers
with reserving part of the memory for the compression purpose.
To enable compression in Xe2 it is necessary to bind memory with one of
the PAT indexes that has compression enabled.
We're introducing 2 new iris_heaps to allocate compressed BO's out of
on Xe2, one for integrated and another for discrete platforms.
With these new iris_heaps we gain cache and sub-allocation for free.
If the compression requirements are met
iris_resource_image_is_pat_compressible() returns true so
BO_ALLOC_COMPRESSED is set and the the BO is allocated out of
the correct heap.
At this moment iris_resource_image_is_pat_compressible()
defaults to returning false as more work needs to be done but
the foundation for the compressed allocation is here.
Reviewed-by: Rohan Garg <rohan.garg@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28833>
José Roberto de Souza
460aa58911