[PATCH 00/27] Clean up GuC CI failures, simplify locking, and kernel DOC

[Matthew Brost]

Daniel Vetter pointed out that locking in the GuC submission code was
overly complicated, let's clean this up a bit before introducing more
features in the GuC submission backend.

Also fix some CI failures, port fixes from our internal tree, and add a
few more selftests for coverage.

Lastly, add some kernel DOC explaining how the GuC submission backend
works.

v2: Fix logic error in 'Workaround reset G2H is received after schedule
done G2H', don't propagate errors to dependent fences in execlists
submissiom, resolve checkpatch issues, resend to correct lists
v3: Fix issue kicking tasklet, drop guc_active, fix ref counting in
xarray, add guc_id sub structure, drop inline fuctions, and various
other cleanup suggested by Daniel
v4: Address Daniele's feedback, rebase to tip, resend for CI

Signed-off-by: Matthew Brost <matthew.brost at intel.com>

Matthew Brost (27):
  drm/i915/guc: Fix blocked context accounting
  drm/i915/guc: Fix outstanding G2H accounting
  drm/i915/guc: Unwind context requests in reverse order
  drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context
  drm/i915/guc: Process all G2H message at once in work queue
  drm/i915/guc: Workaround reset G2H is received after schedule done G2H
  Revert "drm/i915/gt: Propagate change in error status to children on
    unhold"
  drm/i915/selftests: Add a cancel request selftest that triggers a
    reset
  drm/i915/guc: Kick tasklet after queuing a request
  drm/i915/guc: Don't enable scheduling on a banned context, guc_id
    invalid, not registered
  drm/i915/guc: Copy whole golden context, set engine state size of
    subset
  drm/i915/selftests: Add initial GuC selftest for scrubbing lost G2H
  drm/i915/guc: Take context ref when cancelling request
  drm/i915/guc: Don't touch guc_state.sched_state without a lock
  drm/i915/guc: Reset LRC descriptor if register returns -ENODEV
  drm/i915: Allocate error capture in nowait context
  drm/i915/guc: Flush G2H work queue during reset
  drm/i915/guc: Release submit fence from an irq_work
  drm/i915/guc: Move guc_blocked fence to struct guc_state
  drm/i915/guc: Rework and simplify locking
  drm/i915/guc: Proper xarray usage for contexts_lookup
  drm/i915/guc: Drop pin count check trick between sched_disable and
    re-pin
  drm/i915/guc: Move GuC priority fields in context under guc_active
  drm/i915/guc: Move fields protected by guc->contexts_lock into sub
    structure
  drm/i915/guc: Drop guc_active move everything into guc_state
  drm/i915/guc: Add GuC kernel doc
  drm/i915/guc: Drop static inline functions intel_guc_submission.c

 drivers/gpu/drm/i915/gt/intel_context.c       |  19 +-
 drivers/gpu/drm/i915/gt/intel_context_types.h |  81 +-
 .../drm/i915/gt/intel_execlists_submission.c  |   4 -
 drivers/gpu/drm/i915/gt/selftest_hangcheck.c  |   6 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc.h        |  19 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c    |  28 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c     |   6 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 996 +++++++++++-------
 drivers/gpu/drm/i915/gt/uc/selftest_guc.c     | 127 +++
 drivers/gpu/drm/i915/i915_gpu_error.c         |  39 +-
 drivers/gpu/drm/i915/i915_request.h           |  23 +-
 drivers/gpu/drm/i915/i915_trace.h             |  12 +-
 .../drm/i915/selftests/i915_live_selftests.h  |   1 +
 drivers/gpu/drm/i915/selftests/i915_request.c | 100 ++
 .../i915/selftests/intel_scheduler_helpers.c  |  12 +
 .../i915/selftests/intel_scheduler_helpers.h  |   2 +
 16 files changed, 983 insertions(+), 492 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/gt/uc/selftest_guc.c

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2.32.0