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drm/etnaviv: Use DRM_GPU_SCHED_STAT_NO_HANG to skip the reset

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Etnaviv can skip a hardware reset in two situations:

  1. TDR has fired before the free-job worker and the timeout is spurious.
  2. The GPU is still making progress on the front-end and we can give
     the job a chance to complete.

Instead of manipulating scheduler's internals, inform the scheduler that
the job did not actually timeout and no reset was performed through
the new status code DRM_GPU_SCHED_STAT_NO_HANG.

Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Link: https://lore.kernel.org/r/20250714-sched-skip-reset-v6-6-5c5ba4f55039@igalia.com
Signed-off-by: Maíra Canal <mcanal@igalia.com>
This commit is contained in:
Maíra Canal 2025-07-14 19:07:07 -03:00
parent 6b37fbacd0
commit 8902c2b17a
No known key found for this signature in database
GPG Key ID: 3FF30E8A7688FAAA
1 changed files with 4 additions and 8 deletions
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12
drivers/gpu/drm/etnaviv/etnaviv_sched.c
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@ -40,11 +40,11 @@ static enum drm_gpu_sched_stat etnaviv_sched_timedout_job(struct drm_sched_job
int change;
/*
* If the GPU managed to complete this jobs fence, the timout is
* spurious. Bail out.
* If the GPU managed to complete this jobs fence, the timeout has
* fired before free-job worker. The timeout is spurious, so bail out.
*/
if (dma_fence_is_signaled(submit->out_fence))
goto out_no_timeout;
return DRM_GPU_SCHED_STAT_NO_HANG;
/*
* If the GPU is still making forward progress on the front-end (which
@ -70,7 +70,7 @@ static enum drm_gpu_sched_stat etnaviv_sched_timedout_job(struct drm_sched_job
gpu->hangcheck_dma_addr = dma_addr;
gpu->hangcheck_primid = primid;
gpu->hangcheck_fence = gpu->completed_fence;
goto out_no_timeout;
return DRM_GPU_SCHED_STAT_NO_HANG;
}
/* block scheduler */
@ -87,10 +87,6 @@ static enum drm_gpu_sched_stat etnaviv_sched_timedout_job(struct drm_sched_job
drm_sched_start(&gpu->sched, 0);
return DRM_GPU_SCHED_STAT_RESET;
out_no_timeout:
list_add(&sched_job->list, &sched_job->sched->pending_list);
return DRM_GPU_SCHED_STAT_RESET;
}
static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)