On Gen11 and above, the 3DPRIMITIVE command takes an optional additional
three DWORDs of data as "extended parameters". These extended
parameters only exist in the packet if "Extended Parameters Present" is
set. Because our packing code doesn't handle variable-length commands
well, this commit adds a second version of the command which isn't real
but is just a copy of 3DPRIMITIVE with the additional dwords where the
"Extended Parameters Present" defaults to true and "DWord Length" is
adjusted by 3 as needed. The 3DPRIMITIVE command is then the gen4-9
version which still works fine but doesn't have the new parameters.
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20295>
Jason Ekstrand
9859413bf4