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Chris Wilson authored
Use the per-engine sysfs directory to let userspace discover the mmio_base of each engine. Prior to recent generations, the user accessible registers on each engine are at a fixed offset relative to each engine -- but require absolute addressing. As the absolute address depends on the actual physical engine, this is not always possible to determine from userspace (for example icl may expose vcs1 or vcs2 as the second vcs engine). Make this easy for userspace to discover by providing the mmio_base in sysfs. Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Acked-by:
Lionel Landwerlin <lionel.g.landwerlin@intel.com> Reviewed-by:
Steve Carbonari <steven.carbonari@intel.com> Tested-by:
Steve Carbonari <steven.carbonari@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200228131716.3243616-2-chris@chris-wilson.co.uk
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