[PATCH v3 0/2] drm/xe: adding wait helper for gt async reset

[Maciej Patelczyk]

GT reset is asynchronous. However, in few places there is an explicit
wait for reset to finish via flush_work.
Providing a synchronous gt reset version and additionally wait helper

The usage of asynchronous reset in sysfs gt0/tile0/ccs_mode creates
a situation in which a user after changing ccs_mode with immediate
query can receive only partial configuration due to ongoing reset.
For instance a single compute engine where 4 were requested.
This sometimes happens in the EU Debugger tests leading to skips or
even failures (sysfs not accessible).
This forces usage of sleep() in tests to wait for reset to complete.

The first patch provides xe_gt_reset and a helper xe_gt_reset_wait.
The second patch makes ccs_mode sysfs write wait for reset to
finish.

v3: - xe_gt_reset_wait to xe_gt_wait_for_reset
    - xe_gt_debugfs.c: force_reset_sync() calls xe_gt_reset().

Maciej Patelczyk (2):
  drm/xe: introduce xe_gt_reset and xe_gt_wait_for_reset
  drm/xe: make change ccs_mode a synchronous action

 drivers/gpu/drm/xe/tests/xe_bo.c    |  7 +++----
 drivers/gpu/drm/xe/tests/xe_mocs.c  |  3 +--
 drivers/gpu/drm/xe/xe_gt.h          | 25 +++++++++++++++++++++++++
 drivers/gpu/drm/xe/xe_gt_ccs_mode.c |  2 +-
 drivers/gpu/drm/xe/xe_gt_debugfs.c  |  4 +---
 5 files changed, 31 insertions(+), 10 deletions(-)

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2.43.0