Re: [PATCH 2/2] drm/i915: Display current hangcheck status in debugfs

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Fri, Jan 23, 2015 at 02:44:08PM +0200, Mika Kuoppala wrote:
> From: Chris Wilson <chris@chris-wilson.co.uk>
> 
> For example,
> 
> /sys/kernel/debug/dri/0/i915_hangcheck_info:
> 
> Hangcheck active, fires in 15887800ms
> render ring:
>         seqno = -4059 [current -583]
>         action = 2
>         score = 0
>         ACTHD = 1ee8 [current 21f980]
>         max ACTHD = 0
> 
> v2: Include expiration ETA. Can anyone spot a problem?
> v3: Convert for workqueued hangcheck (Mika)
> 
> Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he@intel.com) (v2)
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> (v2)
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> (v2)
> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_debugfs.c | 36 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 36 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index 2ad4c48..1502c96 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -1219,6 +1219,41 @@ out:
>  	return ret;
>  }
>  
> +static int i915_hangcheck_info(struct seq_file *m, void *unused)
> +{
> +	struct drm_info_node *node = m->private;
> +	struct drm_i915_private *dev_priv = to_i915(node->minor->dev);
> +	struct intel_engine_cs *ring;
> +	int i;
> +
> +	if (!i915.enable_hangcheck) {
> +		seq_printf(m, "Hangcheck disabled\n");
> +		return 0;
> +	}
> +
> +	if (delayed_work_pending(&dev_priv->gpu_error.hangcheck_work)) {
> +		seq_printf(m, "Hangcheck active, fires in %dms\n",
> +			   jiffies_to_msecs(dev_priv->gpu_error.hangcheck_work.timer.expires -
> +					    jiffies));
> +	} else
> +		seq_printf(m, "Hangcheck inactive\n");
> +
> +	for_each_ring(ring, dev_priv, i) {
> +		seq_printf(m, "%s:\n", ring->name);
> +		seq_printf(m, "\tseqno = %d [current %d]\n",

%u ?

> +			   ring->hangcheck.seqno, ring->get_seqno(ring, false));
> +		seq_printf(m, "\taction = %d\n", ring->hangcheck.action);
> +		seq_printf(m, "\tscore = %d\n", ring->hangcheck.score);
> +		seq_printf(m, "\tACTHD = 0x%08llx [current 0x%08llx]\n",
> +			   (long long)ring->hangcheck.acthd,
> +			   (long long)intel_ring_get_active_head(ring));
> +		seq_printf(m, "\tmax ACTHD = 0x%08llx\n",
> +			   (long long)ring->hangcheck.max_acthd);
> +	}
> +
> +	return 0;
> +}
> +
>  static int ironlake_drpc_info(struct seq_file *m)
>  {
>  	struct drm_info_node *node = m->private;
> @@ -4407,6 +4442,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
>  	{"i915_gem_hws_vebox", i915_hws_info, 0, (void *)VECS},
>  	{"i915_gem_batch_pool", i915_gem_batch_pool_info, 0},
>  	{"i915_frequency_info", i915_frequency_info, 0},
> +	{"i915_hangcheck_info", i915_hangcheck_info, 0},
>  	{"i915_drpc_info", i915_drpc_info, 0},
>  	{"i915_emon_status", i915_emon_status, 0},
>  	{"i915_ring_freq_table", i915_ring_freq_table, 0},
> -- 
> 1.9.1
> 
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-- 
Ville Syrjälä
Intel OTC
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