Re: [PATCH 2/9] drm/i915/gvt: Fold vGPU active check into inner functions

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

On 17/05/16 09:19, Zhi Wang wrote:
> v5:
> - Let functions take struct drm_i915_private *. (Tvrtko)
>
> - Fold vGPU related active check into the inner functions. (Kevin)
>
> Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
> ---
>   drivers/gpu/drm/i915/i915_gem_gtt.c | 11 ++++-------
>   drivers/gpu/drm/i915/i915_vgpu.c    | 13 +++++++++----
>   drivers/gpu/drm/i915/i915_vgpu.h    |  4 ++--
>   3 files changed, 15 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
> index 7eab619..820b59e 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> @@ -2737,11 +2737,9 @@ static int i915_gem_setup_global_gtt(struct drm_device *dev,
>   	i915_address_space_init(&ggtt->base, dev_priv);
>   	ggtt->base.total += PAGE_SIZE;
>
> -	if (intel_vgpu_active(dev_priv)) {
> -		ret = intel_vgt_balloon(dev);
> -		if (ret)
> -			return ret;
> -	}
> +	ret = intel_vgt_balloon(dev_priv);
> +	if (ret)
> +		return ret;
>
>   	if (!HAS_LLC(dev))
>   		ggtt->base.mm.color_adjust = i915_gtt_color_adjust;
> @@ -2841,8 +2839,7 @@ void i915_ggtt_cleanup_hw(struct drm_device *dev)
>   	i915_gem_cleanup_stolen(dev);
>
>   	if (drm_mm_initialized(&ggtt->base.mm)) {
> -		if (intel_vgpu_active(dev_priv))
> -			intel_vgt_deballoon();
> +		intel_vgt_deballoon(dev_priv);
>
>   		drm_mm_takedown(&ggtt->base.mm);
>   		list_del(&ggtt->base.global_link);
> diff --git a/drivers/gpu/drm/i915/i915_vgpu.c b/drivers/gpu/drm/i915/i915_vgpu.c
> index d5a7a5e..5312816 100644
> --- a/drivers/gpu/drm/i915/i915_vgpu.c
> +++ b/drivers/gpu/drm/i915/i915_vgpu.c
> @@ -101,10 +101,13 @@ static struct _balloon_info_ bl_info;
>    * This function is called to deallocate the ballooned-out graphic memory, when
>    * driver is unloaded or when ballooning fails.
>    */
> -void intel_vgt_deballoon(void)
> +void intel_vgt_deballoon(struct drm_i915_private *dev_priv)
>   {
>   	int i;
>
> +	if (!intel_vgpu_active(dev_priv))
> +		return;
> +
>   	DRM_DEBUG("VGT deballoon.\n");
>
>   	for (i = 0; i < 4; i++) {
> @@ -177,9 +180,8 @@ static int vgt_balloon_space(struct drm_mm *mm,
>    * Returns:
>    * zero on success, non-zero if configuration invalid or ballooning failed
>    */
> -int intel_vgt_balloon(struct drm_device *dev)
> +int intel_vgt_balloon(struct drm_i915_private *dev_priv)
>   {
> -	struct drm_i915_private *dev_priv = to_i915(dev);
>   	struct i915_ggtt *ggtt = &dev_priv->ggtt;
>   	unsigned long ggtt_end = ggtt->base.start + ggtt->base.total;
>
> @@ -187,6 +189,9 @@ int intel_vgt_balloon(struct drm_device *dev)
>   	unsigned long unmappable_base, unmappable_size, unmappable_end;
>   	int ret;
>
> +	if (!intel_vgpu_active(dev_priv))
> +		return 0;
> +
>   	mappable_base = I915_READ(vgtif_reg(avail_rs.mappable_gmadr.base));
>   	mappable_size = I915_READ(vgtif_reg(avail_rs.mappable_gmadr.size));
>   	unmappable_base = I915_READ(vgtif_reg(avail_rs.nonmappable_gmadr.base));
> @@ -258,6 +263,6 @@ int intel_vgt_balloon(struct drm_device *dev)
>
>   err:
>   	DRM_ERROR("VGT balloon fail\n");
> -	intel_vgt_deballoon();
> +	intel_vgt_deballoon(dev_priv);
>   	return ret;
>   }
> diff --git a/drivers/gpu/drm/i915/i915_vgpu.h b/drivers/gpu/drm/i915/i915_vgpu.h
> index 07e67d5..f8917c6 100644
> --- a/drivers/gpu/drm/i915/i915_vgpu.h
> +++ b/drivers/gpu/drm/i915/i915_vgpu.h
> @@ -27,7 +27,7 @@
>   #include "i915_pvinfo.h"
>
>   extern void i915_check_vgpu(struct drm_i915_private *dev_priv);
> -extern int intel_vgt_balloon(struct drm_device *dev);
> -extern void intel_vgt_deballoon(void);
> +extern int intel_vgt_balloon(struct drm_i915_private *dev_priv);
> +extern void intel_vgt_deballoon(struct drm_i915_private *dev_priv);
>
>   #endif /* _I915_VGPU_H_ */
>

Looks clean to me.

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

Regards,

Tvrtko
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