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

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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@xxxxxxxxx>
---
  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@xxxxxxxxx>

Regards,

Tvrtko
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