[PATCH v4 0/2] Support/debug for slow GuC loads

[John.C.Harrison at Intel.com]

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

Sometimes the GuC load is slower that it should be. For end users,
that usually means some kind of thermal throttling issue. Internally,
there can be any number of bugs that cause it. So don't completely
fail to load, just cope with it and report the problem.

v2: Revert include order (review feedback from Lucas)
v3: Remove '_sysfs' from throttle file names and keep limit query in
the same file rather than moving elsewhere (review feedback from
Rodrigo). Fix the reporting of requested vs granted frequencies
(review feedback from Badal).
v4: Manually code the loop timeout/condition checking because helper
functions are not allowed (review feedback from Lucas/Rodrigo)

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


John Harrison (2):
  drm/xe: Make read_perf_limit_reasons globally accessible
  drm/xe/guc: Port over the slow GuC loading support from i915

 drivers/gpu/drm/xe/Makefile                   |   2 +-
 drivers/gpu/drm/xe/abi/guc_errors_abi.h       |  26 +-
 drivers/gpu/drm/xe/regs/xe_guc_regs.h         |   2 +
 drivers/gpu/drm/xe/xe_gt_freq.c               |   4 +-
 ...e_gt_throttle_sysfs.c => xe_gt_throttle.c} |  26 +-
 drivers/gpu/drm/xe/xe_gt_throttle.h           |  17 ++
 drivers/gpu/drm/xe/xe_gt_throttle_sysfs.h     |  16 --
 drivers/gpu/drm/xe/xe_guc.c                   | 226 ++++++++++++++----
 drivers/gpu/drm/xe/xe_mmio.c                  |  61 +++++
 drivers/gpu/drm/xe/xe_mmio.h                  |   2 +
 10 files changed, 307 insertions(+), 75 deletions(-)
 rename drivers/gpu/drm/xe/{xe_gt_throttle_sysfs.c => xe_gt_throttle.c} (86%)
 create mode 100644 drivers/gpu/drm/xe/xe_gt_throttle.h
 delete mode 100644 drivers/gpu/drm/xe/xe_gt_throttle_sysfs.h

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2.43.0