Re: [PATCH 7/8] drm/i915/get_params: Add GuC status to getparams

[Jeff McGee <jeff.mcgee@intel.com>]

On Fri, Oct 07, 2016 at 09:11:03AM +0200, Daniel Vetter wrote:
> On Wed, Oct 05, 2016 at 01:51:14PM -0700, Rodrigo Vivi wrote:
> > 
> > 
> > Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
> 
> This is new uabi. Where's the userspace?
> 
> Checking this is part of the review.
> -Daniel
> 
I'm not sure that GuC status is strictly needed by userspace. No
direct dependencies that I am aware of. HuC status is needed and that
is the subsequent patch.
-Jeff

> > 
> > On Mon, Oct 03, 2016 at 11:43:01AM -0700, Anusha Srivatsa wrote:
> > > From: Peter Antoine <peter.antoine@intel.com>
> > > 
> > > This patch returns the GuC status to the caller. It is used so
> > > that the userspace knows if the GuC has been loaded.
> > > 
> > > v4: rebase.
> > > v5: rebased.
> > > 
> > > Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
> > > Signed-off-by: Peter Antoine <peter.antoine@intel.com>
> > > ---
> > >  drivers/gpu/drm/i915/i915_drv.c         |  4 ++++
> > >  drivers/gpu/drm/i915/intel_guc.h        |  2 +-
> > >  drivers/gpu/drm/i915/intel_guc_loader.c | 18 ++++++++++++++++++
> > >  include/uapi/drm/i915_drm.h             |  1 +
> > >  4 files changed, 24 insertions(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> > > index 7af7bd6..ff1c18d 100644
> > > --- a/drivers/gpu/drm/i915/i915_drv.c
> > > +++ b/drivers/gpu/drm/i915/i915_drv.c
> > > @@ -49,6 +49,7 @@
> > >  #include "i915_trace.h"
> > >  #include "i915_vgpu.h"
> > >  #include "intel_drv.h"
> > > +#include "intel_guc.h"
> > >  
> > >  static struct drm_driver driver;
> > >  
> > > @@ -339,6 +340,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
> > >  		 */
> > >  		value = 1;
> > >  		break;
> > > +	case I915_PARAM_HAS_GUC:
> > > +		value = intel_is_guc_valid(dev_priv);
> > > +		break;
> > >  	default:
> > >  		DRM_DEBUG("Unknown parameter %d\n", param->param);
> > >  		return -EINVAL;
> > > diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h
> > > index af76ffe..3a7fa7e 100644
> > > --- a/drivers/gpu/drm/i915/intel_guc.h
> > > +++ b/drivers/gpu/drm/i915/intel_guc.h
> > > @@ -168,5 +168,5 @@ int i915_guc_submission_enable(struct drm_i915_private *dev_priv);
> > >  int i915_guc_wq_reserve(struct drm_i915_gem_request *rq);
> > >  void i915_guc_submission_disable(struct drm_i915_private *dev_priv);
> > >  void i915_guc_submission_fini(struct drm_i915_private *dev_priv);
> > > -
> > > +int intel_is_guc_valid(struct drm_i915_private *dev_priv);
> > >  #endif
> > > diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
> > > index 31a2b0a..5d2a703 100644
> > > --- a/drivers/gpu/drm/i915/intel_guc_loader.c
> > > +++ b/drivers/gpu/drm/i915/intel_guc_loader.c
> > > @@ -801,3 +801,21 @@ void intel_guc_fini(struct drm_device *dev)
> > >  
> > >  	guc_fw->fetch_status = UC_FIRMWARE_NONE;
> > >  }
> > > +
> > > +/**
> > > + * intel_is_guc_valid() - Check to see if the GuC is fully loaded.
> > > + * @dev:	drm dedvice to check.
> > > + *
> > > + * This function will return true if the guc has been loaded and
> > > + * has valid firmware.
> > > + */
> > > +int intel_is_guc_valid(struct drm_i915_private *dev_priv)
> > > +{
> > > +	struct intel_uc_fw *guc_fw = &dev_priv->guc.guc_fw;
> > > +
> > > +	if (guc_fw->load_status == UC_FIRMWARE_SUCCESS)
> > > +		return 1;
> > > +	else
> > > +		return 0;
> > > +}
> > > +
> > > diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
> > > index 03725fe..629fb5e 100644
> > > --- a/include/uapi/drm/i915_drm.h
> > > +++ b/include/uapi/drm/i915_drm.h
> > > @@ -388,6 +388,7 @@ typedef struct drm_i915_irq_wait {
> > >  #define I915_PARAM_HAS_POOLED_EU	 38
> > >  #define I915_PARAM_MIN_EU_IN_POOL	 39
> > >  #define I915_PARAM_MMAP_GTT_VERSION	 40
> > > +#define I915_PARAM_HAS_GUC		 41
> > >  
> > >  typedef struct drm_i915_getparam {
> > >  	__s32 param;
> > > -- 
> > > 2.7.4
> > > 
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> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
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