[Intel-gfx] [PATCH] drm/i915/selftests: Dump engine state and trace upon hanging after reset

[Mika Kuoppala]

Chris Wilson <chris at chris-wilson.co.uk> writes:

> If the engine dies after a reset, and so we fail to submit a request
> but need to be interrupted by the CI runner, dump the engine state.
>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>

> ---
>  drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
> index 2af66f8ffbd2..1ea4935e0eeb 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
> @@ -499,6 +499,21 @@ static int igt_reset_nop_engine(void *arg)
>  
>  				rq = intel_context_create_request(ce);
>  				if (IS_ERR(rq)) {
> +					struct drm_printer p =
> +						drm_info_printer(gt->i915->drm.dev);
> +					intel_engine_dump(engine, &p,
> +							  "%s(%s): failed to submit request\n",
> +							  __func__,
> +							  engine->name);
> +
> +
> +					GEM_TRACE("%s(%s): failed to submit request\n",
> +						  __func__,
> +						  engine->name);
> +					GEM_TRACE_DUMP();
> +
> +					intel_gt_set_wedged(gt);
> +
>  					err = PTR_ERR(rq);
>  					break;
>  				}
> -- 
> 2.20.1
>
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