On Mon, Aug 14, 2023 at 06:12:08PM -0700, Alan Previn wrote:
> When suspending, flush the context-guc-id
> deregistration worker at the final stages of
> intel_gt_suspend_late when we finally call gt_sanitize
> that eventually leads down to __uc_sanitize so that
> the deregistration worker doesn't fire off later as
> we reset the GuC microcontroller.
>
> Signed-off-by: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 5 +++++
> drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h | 2 ++
> drivers/gpu/drm/i915/gt/uc/intel_uc.c | 2 ++
> 3 files changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> index a0e3ef1c65d2..050572bb8dbe 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> @@ -1578,6 +1578,11 @@ static void guc_flush_submissions(struct intel_guc *guc)
> spin_unlock_irqrestore(&sched_engine->lock, flags);
> }
>
> +void intel_guc_submission_flush_work(struct intel_guc *guc)
> +{
> + flush_work(&guc->submission_state.destroyed_worker);
> +}
> +
> static void guc_flush_destroyed_contexts(struct intel_guc *guc);
>
> void intel_guc_submission_reset_prepare(struct intel_guc *guc)
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
> index c57b29cdb1a6..b6df75622d3b 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
> @@ -38,6 +38,8 @@ int intel_guc_wait_for_pending_msg(struct intel_guc *guc,
> bool interruptible,
> long timeout);
>
> +void intel_guc_submission_flush_work(struct intel_guc *guc);
> +
> static inline bool intel_guc_submission_is_supported(struct intel_guc *guc)
> {
> return guc->submission_supported;
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> index 98b103375b7a..eb3554cb5ea4 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> @@ -693,6 +693,8 @@ void intel_uc_suspend(struct intel_uc *uc)
> return;
> }
>
> + intel_guc_submission_flush_work(guc);
> +
what happens if a new job comes exactly here?
This still sounds a bit racy, although this already looks
much cleaner than the previous version.
> with_intel_runtime_pm(&uc_to_gt(uc)->i915->runtime_pm, wakeref) {
> err = intel_guc_suspend(guc);
> if (err)
> --
> 2.39.0
>
