[PATCH v3 0/7] drm/i915: HuC loading and authentication for MTL

[Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>]

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@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Acked-by: Tony Ye <tony.ye@intel.com>

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

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2.40.0