[PATCH v2 0/8] drm/i915: HuC loading and authentication for MTL

[Daniele Ceraolo Spurio]

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.

The SW proxy series [1] has been included, squashed in a single patch,
as some of some of the patches in this series depend on it. This is not
a functional dependencies, the patches just touch the same code; the
proxy patches are planned to be merged first, so it is easier to base
the new patches on top of it to avoid having to rebase them later.

v2: fix HuC auth status check for DG2.

[1] https://patchwork.freedesktop.org/series/115806/
Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
Acked-by: Tony Ye <tony.ye at intel.com>

Daniele Ceraolo Spurio (8):
  DO NOT REVIEW: drm/i915: Add support for MTL GSC SW Proxy
  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/Makefile                 |   1 +
 drivers/gpu/drm/i915/gt/intel_ggtt.c          |   3 +
 drivers/gpu/drm/i915/gt/intel_gt_irq.c        |  22 +-
 drivers/gpu/drm/i915/gt/intel_gt_regs.h       |   3 +
 .../drm/i915/gt/uc/intel_gsc_meu_headers.h    |  74 +++
 drivers/gpu/drm/i915/gt/uc/intel_gsc_proxy.c  | 424 ++++++++++++++++++
 drivers/gpu/drm/i915/gt/uc/intel_gsc_proxy.h  |  18 +
 drivers/gpu/drm/i915/gt/uc/intel_gsc_uc.c     |  89 +++-
 drivers/gpu/drm/i915/gt/uc/intel_gsc_uc.h     |  17 +-
 .../i915/gt/uc/intel_gsc_uc_heci_cmd_submit.c |   2 +-
 .../i915/gt/uc/intel_gsc_uc_heci_cmd_submit.h |   1 +
 drivers/gpu/drm/i915/gt/uc/intel_guc.c        |   2 +-
 drivers/gpu/drm/i915/gt/uc/intel_huc.c        | 182 +++++---
 drivers/gpu/drm/i915/gt/uc/intel_huc.h        |  26 +-
 drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c     | 214 ++++++++-
 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      | 120 ++---
 drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h      |   9 +-
 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 +-
 drivers/misc/mei/Kconfig                      |   2 +-
 drivers/misc/mei/Makefile                     |   1 +
 drivers/misc/mei/gsc_proxy/Kconfig            |  14 +
 drivers/misc/mei/gsc_proxy/Makefile           |   7 +
 drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c    | 208 +++++++++
 include/drm/i915_component.h                  |   3 +-
 include/drm/i915_gsc_proxy_mei_interface.h    |  53 +++
 include/uapi/drm/i915_drm.h                   |   3 +-
 33 files changed, 1428 insertions(+), 134 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_gsc_meu_headers.h
 create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_gsc_proxy.c
 create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_gsc_proxy.h
 create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_huc_print.h
 create mode 100644 drivers/misc/mei/gsc_proxy/Kconfig
 create mode 100644 drivers/misc/mei/gsc_proxy/Makefile
 create mode 100644 drivers/misc/mei/gsc_proxy/mei_gsc_proxy.c
 create mode 100644 include/drm/i915_gsc_proxy_mei_interface.h

-- 
2.40.0