On newer platforms (starting DG2 G10 B-step and G11 A-step), ownership of HuC loading and authentication has been moved from the GuC to the GSC, with both actions being performed via a single PXP command. Given that the mei code has not fully landed yet (see [1]), we can't implement the new load mechanism, but we can start getting ready for it by taking care of the changes required for the existing code:
- The HuC header is now different from the GuC one. This also means that if the FW is for GSC-loading and the HW fuse is set to legacy load (or vice-versa) we can't load the HuC.
- To send a PXP message to the GSC we need both MEI_GSC and MEI_PXP.
- All legacy HuC loading paths can be skipped.
Note that the HuC fw version for DG2 is still not defined, so the HuC code will be skipped until the define is added.
v2: drop changes in auth checking for legacy paths.
[1] https://patchwork.freedesktop.org/series/102339/
Cc: Alan Previn alan.previn.teres.alexis@intel.com Cc: John Harrison john.c.harrison@intel.com
Daniele Ceraolo Spurio (4): drm/i915/huc: drop intel_huc_is_authenticated drm/i915/huc: Add fetch support for gsc-loaded HuC binary drm/i915/huc: Prepare for GSC-loaded HuC drm/i915/huc: Don't fail the probe if HuC init fails
drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h | 1 + drivers/gpu/drm/i915/gt/uc/intel_huc.c | 97 +++++++++++++++---- drivers/gpu/drm/i915/gt/uc/intel_huc.h | 5 +- drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c | 5 +- drivers/gpu/drm/i915/gt/uc/intel_uc.c | 22 +++-- drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c | 99 ++++++++++++-------- drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h | 2 + drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h | 9 ++ 8 files changed, 172 insertions(+), 68 deletions(-)