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

[John Harrison]

@Lucas, ping for review?


On 2/27/2024 17:09, John.C.Harrison at Intel.com wrote:
> 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
>