The HuC loading and authentication flow is once again changing and a new
"clear-media only" authentication step is introduced. The flow is as
follows:
1) The HuC is loaded via DMA - same as all non-GSC HuC binaries.
2) The HuC is authenticated by the GuC - this is the same step as
performed for all non-GSC HuC binaries and re-uses the same code, but
it is now resulting in a partial authentication that only allows
clear-media workloads.
3) The HuC is fully authenticated for all workloads by the GSC - this
is done via a new PXP command, submitted via the GSCCS.
The advantage of this new flow is that we can start processing
clear-media workloads without having to wait for the GSC to be ready,
which can take several seconds.
As part of this change, the HuC status getparam has been updated with a
new value to indicate a partial authentication. Note tha the media
driver is checking for value > 0 for clear media workloads, so no
changes are required in userspace for that to work.
v2: fix HuC auth status check for DG2.
v3: addrss review feedback, stop using the "meu" tag for the naming of
the headers, better comments
Cc: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx>
Cc: John Harrison <John.C.Harrison@xxxxxxxxx>
Acked-by: Tony Ye <tony.ye@xxxxxxxxx>
Daniele Ceraolo Spurio (7):
drm/i915/uc: perma-pin firmwares
drm/i915/huc: Parse the GSC-enabled HuC binary
drm/i915/huc: Load GSC-enabled HuC via DMA xfer if the fuse says so
drm/i915/huc: differentiate the 2 steps of the MTL HuC auth flow
drm/i915/mtl/huc: auth HuC via GSC
drm/i915/mtl/huc: Use the media gt for the HuC getparam
drm/i915/huc: define HuC FW version for MTL
drivers/gpu/drm/i915/gt/intel_ggtt.c | 3 +
.../drm/i915/gt/uc/intel_gsc_binary_headers.h | 74 ++++++
drivers/gpu/drm/i915/gt/uc/intel_gsc_uc.c | 34 ++-
.../i915/gt/uc/intel_gsc_uc_heci_cmd_submit.c | 2 +-
drivers/gpu/drm/i915/gt/uc/intel_guc.c | 2 +-
drivers/gpu/drm/i915/gt/uc/intel_huc.c | 201 ++++++++++-----
drivers/gpu/drm/i915/gt/uc/intel_huc.h | 26 +-
drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c | 233 +++++++++++++++++-
drivers/gpu/drm/i915/gt/uc/intel_huc_fw.h | 6 +-
drivers/gpu/drm/i915/gt/uc/intel_huc_print.h | 21 ++
drivers/gpu/drm/i915/gt/uc/intel_uc.c | 10 +-
drivers/gpu/drm/i915/gt/uc/intel_uc.h | 2 +
drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c | 132 +++++-----
drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h | 26 +-
drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h | 6 -
drivers/gpu/drm/i915/i915_getparam.c | 6 +-
drivers/gpu/drm/i915/i915_reg.h | 3 +
.../drm/i915/pxp/intel_pxp_cmd_interface_43.h | 14 +-
drivers/gpu/drm/i915/pxp/intel_pxp_huc.c | 2 +-
include/uapi/drm/i915_drm.h | 3 +-
20 files changed, 654 insertions(+), 152 deletions(-)
create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_gsc_binary_headers.h
create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_huc_print.h
--
2.40.0
