[Intel-gfx] [PATCH v2 0/4] i915: Turn on compute engine support

[Matt Roper]

Now that the necessary GuC-based hardware workarounds have landed, we're
finally ready to actually enable compute engines for use by userspace.
All of the "under-the-hood" heavy lifting already landed a while back in
other series so all that remains now is to add I915_ENGINE_CLASS_COMPUTE
to the uapi enum and add the CCS engines to the engine lists for the
Xe_HP SDV and DG2.

Userspace (Mesa) is linked in the ABI patch.  Existing IGT tests (e.g.,
i915_hangman) provide test coverage for general engine behavior since compute
engines should follow the same general rules as other engines.  We've also
recently added some additional subtests like
igt at gem_reset_stats@shared-reset-domain to cover the user-visible impacts of
the compute engines sharing the same hardware reset domain as the render
engine.

v2:
 - Update TLB invalidation register for compute engines and move it to a
   separate patch since it isn't related to the new uapi.  (Tvrtko,
   Prathap)
 - Move new kerneldoc for pre-existing engine classes to a separate
   patch.  (Andi)
 - Drop the compute UMD merge request link for now because it also
   included some additional multi-tile uapi that we're not ready to
   upstream just yet.  Even if they don't have a disentangled MR ready
   for reference, we still have the Mesa MR as a key userspace consumer.
   (Tvrtko)

Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin at linux.intel.com>

Daniele Ceraolo Spurio (1):
  drm/i915: Xe_HP SDV and DG2 have up to 4 CCS engines

Matt Roper (3):
  drm/i915/uapi: Add kerneldoc for engine class enum
  drm/i915/xehp: Add register for compute engine's MMIO-based TLB
    invalidation
  drm/i915/xehp: Add compute engine ABI

 drivers/gpu/drm/i915/gt/intel_engine_user.c |  2 +-
 drivers/gpu/drm/i915/gt/intel_gt.c          |  1 +
 drivers/gpu/drm/i915/gt/intel_gt_regs.h     |  1 +
 drivers/gpu/drm/i915/i915_drm_client.c      |  1 +
 drivers/gpu/drm/i915/i915_drm_client.h      |  2 +-
 drivers/gpu/drm/i915/i915_pci.c             |  6 +-
 include/uapi/drm/i915_drm.h                 | 62 +++++++++++++++++++--
 7 files changed, 65 insertions(+), 10 deletions(-)

-- 
2.35.1