[PATCH v2 0/2] xe: Add IP versions to GT query

[Matt Roper <matthew.d.roper@intel.com>]

On MTL and later, drivers are expected to determine graphics/media
version and stepping from the values reported in the GMD_ID registers
rather than trying to infer them from PCI devid/revid.  Since userspace
cannot directly access these registers, the graphics/media GMD_ID must
be exposed through the uapi.

Repurpose one of the 'reserved' qwords in the GT query structure to hold
the IP version for platforms with GMD_ID.  These fields will continue to
be 0 on pre-MTL platforms.  Userspace should continue to utilize PCI
devid/revid on those older platforms.

Note that although the hardware has a display IP GMD_ID register as
well, that value will not be exposed through Xe uapi.  As always,
display userspace is expected to use standard atomic properties and
test-only commits to determine platform capabilities rather than
attempting to recognize the underlying IP.

v2:
 - Tweak field naming from "revid" to "rev"  (Lucas)
 - Fix kerneldoc copy/paste mistakes.

Test-with: 20231206204942.1105505-1-matthew.d.roper@intel.com
Testcase: igt@xe_query@query-gt-list
Cc: Francois Dugast <francois.dugast@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>

Matt Roper (2):
  drm/xe: Stash GMD_ID value in xe_gt
  drm/xe/uapi: Add IP version and stepping to GT list query

 drivers/gpu/drm/xe/xe_gt.c       |  6 ++++++
 drivers/gpu/drm/xe/xe_gt_types.h |  2 ++
 drivers/gpu/drm/xe/xe_query.c    |  8 ++++++++
 include/uapi/drm/xe_drm.h        | 10 +++++++++-
 4 files changed, 25 insertions(+), 1 deletion(-)

-- 
2.43.0