[PATCH v2 0/5] Allow error capture without a request / on reset failure

[John.C.Harrison at Intel.com]

From: John Harrison <John.C.Harrison at Intel.com>

It is technically possible to get a hung context without a valid
request. In such a situation, try to provide as much information in
the error capture as possible rather than just aborting and capturing
nothing.

Similarly, in the case of an engine reset failure the GuC is not able
to report the guilty context. So try a manual search instead of
reporting nothing.

v2: Tidy up code flow in error capture. Reword some comments/messages.
(review feedback from Tvrtko)
Also fix up request locking issues from earlier changes noticed during
code review of this change.

Signed-off-by: John Harrison <John.C.Harrison at Intel.com>


John Harrison (5):
  drm/i915: Fix request locking during error capture & debugfs dump
  drm/i915: Allow error capture without a request
  drm/i915: Allow error capture of a pending request
  drm/i915/guc: Look for a guilty context when an engine reset fails
  drm/i915/guc: Add a debug print on GuC triggered reset

 drivers/gpu/drm/i915/gt/intel_context.c       |  1 +
 drivers/gpu/drm/i915/gt/intel_engine_cs.c     |  7 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 32 ++++++++-
 drivers/gpu/drm/i915/i915_gpu_error.c         | 71 ++++++++++++-------
 4 files changed, 82 insertions(+), 29 deletions(-)

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2.39.0