drm: add zcull info and zcull bind for nouveau

Add struct nv_device_zcull_info_v0, fermi_a_zcull_bind_v0, and their
corresponding method opcodes. These allow the graphics driver to query
parameters of the zcull area, and to bind a separate buffer for saving
the zcull data on a context switch as an optimization.

Bug 1580920

Change-Id: If0a60e310d83a8c25ecf11cadadeeff6b5ea1b5e
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
1 file changed