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Xe_HP removed "slice" as a first-class unit in the hardware design.
Instead we now have a single pool of subslices (which are now referred
to as "DSS") that different hardware units have different ways of
grouping ("compute slices," "geometry slices," etc.). For the purposes
of topology representation, we treat Xe_HP-based platforms as having a
single slice that contains all of the platform's DSS. There's no need
to allocate storage space for (max legacy slices * max dss); let's
update some of our macros to minimize the storage requirement for sseu
topology. We'll also document some of the constants to make it a little
bit more clear what they represent.
v2:
- s/LEGACY/HSW/ in macro names. (Lucas)
- Rename MAX() to SSEU_MAX() to avoid any potential clashes with other
definitions elsewhere. Unfortunately max()/max_t() from
linux/minmax.h cannot be used in this context. (Lucas)
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220311225459.385515-1-matthew.d.roper@intel.com
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