[PATCH v2 00/22] Fence deadlines in Xe

[Matthew Brost <matthew.brost@intel.com>]

This series introduces deadline support for exported scheduler fences.
When a deadline is set on a fence, the driver attempts to complete the
work within a configurable window (default 3 ms, via Kconfig) ahead of
the deadline.

As the deadline approaches, the exec queue first receives a frequency
boost. If the queue has CAP_SYS_ADMIN privileges, a later stage also
applies a priority boost. This tiered approach allows work to run at the
same baseline priority as the application, only increasing priority when
a deadline is at risk of being missed.

The primary use case is compositors that target a stable frame cadence
while avoiding a permanently elevated scheduling priority.

Lightly tested with an IGT and running display; behavior appears
correct.

VLK-82801

IGT: https://patchwork.freedesktop.org/series/159616/

v2:
 - Fully implemented deadline manager
 - Separate frequency and priority boost windows
 - Enable deadlines in Intel display

Matt

Matthew Brost (22):
  drm/xe: Add dedicated message lock
  drm/xe: Add EXEC_QUEUE_FLAG_CAP_SYS_NICE
  drm/xe: Store exec queue in hardware fence
  drm/xe: Add deadline exec queue vfuncs
  drm/xe: Export to_xe_hw_fence
  drm/xe: Export xe_hw_fence_signaled
  drm/xe: Implement deadline manager
  drm/xe: Initialize deadline manager on exec queues
  drm/xe: Stub out execlists deadline vfuncs as NOPs
  drm/xe: Make scheduler message lock IRQ-safe
  drm/xe: Support unstable opcodes for static scheduler messages
  drm/xe: Implement GuC submission backend ops for deadlines
  drm/xe: Enable deadlines on hardware fences
  drm/xe: Fix Kconfig.profile newlines
  drm/xe: Add deadline Kconfig options
  drm/xe: Add exec queue deadline trace points
  drm/xe: Add hw fence deadline trace points
  drm/xe: Add timestamp_ms to LRC snapshot
  drm/xe: Enforce GuC static message defines
  drm/xe: Document the deadline manager
  drm/atomic: Export fence deadline helper for atomic commits
  drm/i915/display: Use atomic helper to set plane fence deadlines

 drivers/gpu/drm/drm_atomic_helper.c          |  11 +-
 drivers/gpu/drm/i915/display/intel_display.c |   2 +
 drivers/gpu/drm/xe/Kconfig.profile           |  29 ++
 drivers/gpu/drm/xe/Makefile                  |   1 +
 drivers/gpu/drm/xe/xe_deadline_mgr.c         | 463 +++++++++++++++++++
 drivers/gpu/drm/xe/xe_deadline_mgr.h         |  26 ++
 drivers/gpu/drm/xe/xe_deadline_mgr_types.h   |  52 +++
 drivers/gpu/drm/xe/xe_exec_queue.c           |  11 +
 drivers/gpu/drm/xe/xe_exec_queue_types.h     |  15 +
 drivers/gpu/drm/xe/xe_execlist.c             |  15 +
 drivers/gpu/drm/xe/xe_gpu_scheduler.c        |  43 +-
 drivers/gpu/drm/xe/xe_gpu_scheduler.h        |  17 +-
 drivers/gpu/drm/xe/xe_gpu_scheduler_types.h  |   4 +-
 drivers/gpu/drm/xe/xe_guc_exec_queue_types.h |   2 +-
 drivers/gpu/drm/xe/xe_guc_submit.c           | 170 +++++--
 drivers/gpu/drm/xe/xe_hw_fence.c             |  38 +-
 drivers/gpu/drm/xe/xe_hw_fence.h             |   7 +-
 drivers/gpu/drm/xe/xe_hw_fence_types.h       |  19 +
 drivers/gpu/drm/xe/xe_lrc.c                  |  10 +-
 drivers/gpu/drm/xe/xe_lrc.h                  |   4 +-
 drivers/gpu/drm/xe/xe_sched_job.c            |   5 +-
 drivers/gpu/drm/xe/xe_trace.h                |  42 +-
 include/drm/drm_atomic_helper.h              |   3 +
 23 files changed, 918 insertions(+), 71 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/xe_deadline_mgr.c
 create mode 100644 drivers/gpu/drm/xe/xe_deadline_mgr.h
 create mode 100644 drivers/gpu/drm/xe/xe_deadline_mgr_types.h

-- 
2.34.1