Re: [PATCH 05/13 v4] drm/i915: Debugfs interface to read GuC load status

["O'Rourke, Tom" <Tom.O'Rourke@intel.com>]

On Thu, Jul 09, 2015 at 07:29:06PM +0100, Dave Gordon wrote:
> From: Alex Dai <yu.dai@intel.com>
> 
> The new node provides access to the status of the GuC-specific loader;
> also the scratch registers used for communication between the i915
> driver and the GuC firmware.
> 
> v2:
>     Changes to output formats per Chris Wilson's suggestions
> 
> v4:
>     Rebased
> 
> Issue: VIZ-4884
> Signed-off-by: Alex Dai <yu.dai@intel.com>
> Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
> ---
Reviewed-by: Tom O'Rourke <Tom.O'Rourke@intel.com>

>  drivers/gpu/drm/i915/i915_debugfs.c | 39 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index 98fd3c9..9ff5f17 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -2359,6 +2359,44 @@ static int i915_llc(struct seq_file *m, void *data)
>  	return 0;
>  }
>  
> +static int i915_guc_load_status_info(struct seq_file *m, void *data)
> +{
> +	struct drm_info_node *node = m->private;
> +	struct drm_i915_private *dev_priv = node->minor->dev->dev_private;
> +	struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
> +	u32 tmp, i;
> +
> +	if (!HAS_GUC_UCODE(dev_priv->dev))
> +		return 0;
> +
> +	seq_printf(m, "GuC firmware status:\n");
> +	seq_printf(m, "\tpath: %s\n",
> +		guc_fw->guc_fw_path);
> +	seq_printf(m, "\tfetch: %s\n",
> +		intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status));
> +	seq_printf(m, "\tload: %s\n",
> +		intel_guc_fw_status_repr(guc_fw->guc_fw_load_status));
> +	seq_printf(m, "\tversion wanted: %d.%d\n",
> +		guc_fw->guc_fw_major_wanted, guc_fw->guc_fw_minor_wanted);
> +	seq_printf(m, "\tversion found: %d.%d\n",
> +		guc_fw->guc_fw_major_found, guc_fw->guc_fw_minor_found);
> +
> +	tmp = I915_READ(GUC_STATUS);
> +
> +	seq_printf(m, "\nGuC status 0x%08x:\n", tmp);
> +	seq_printf(m, "\tBootrom status = 0x%x\n",
> +		(tmp & GS_BOOTROM_MASK) >> GS_BOOTROM_SHIFT);
> +	seq_printf(m, "\tuKernel status = 0x%x\n",
> +		(tmp & GS_UKERNEL_MASK) >> GS_UKERNEL_SHIFT);
> +	seq_printf(m, "\tMIA Core status = 0x%x\n",
> +		(tmp & GS_MIA_MASK) >> GS_MIA_SHIFT);
> +	seq_puts(m, "\nScratch registers:\n");
> +	for (i = 0; i < 16; i++)
> +		seq_printf(m, "\t%2d: \t0x%x\n", i, I915_READ(SOFT_SCRATCH(i)));
> +
> +	return 0;
> +}
> +
>  static int i915_edp_psr_status(struct seq_file *m, void *data)
>  {
>  	struct drm_info_node *node = m->private;
> @@ -5073,6 +5111,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
>  	{"i915_gem_hws_bsd", i915_hws_info, 0, (void *)VCS},
>  	{"i915_gem_hws_vebox", i915_hws_info, 0, (void *)VECS},
>  	{"i915_gem_batch_pool", i915_gem_batch_pool_info, 0},
> +	{"i915_guc_load_status", i915_guc_load_status_info, 0},
>  	{"i915_frequency_info", i915_frequency_info, 0},
>  	{"i915_hangcheck_info", i915_hangcheck_info, 0},
>  	{"i915_drpc_info", i915_drpc_info, 0},
> -- 
> 1.9.1
> 
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