[Intel-gfx] [PATCH] drm/i915: Move vgpu balloon info into i915_virtual_gpu struct

[Xiong Zhang]

vgpu ballon info consists of four drm_mm_node which is used to reserve
ggtt space, then linux guest won't use these reserved ggtt space.

Each vgpu has its own ballon info, so move ballon info into
i915_virtual_gpu structure.

Signed-off-by: Xiong Zhang <xiong.y.zhang at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h  | 14 ++++++++++++
 drivers/gpu/drm/i915/i915_vgpu.c | 47 ++++++++++++++++++++--------------------
 2 files changed, 37 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 800230b..2adc73d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1301,6 +1301,20 @@ struct i915_workarounds {
 struct i915_virtual_gpu {
 	bool active;
 	u32 caps;
+
+	struct balloon_info {
+		/*
+		 * There are up to 2 regions per mappable/unmappable graphic
+		 * memory that might be ballooned. Here, index 0/1 is for
+		 * mappable graphic memory, 2/3 for unmappable graphic memory.
+		 */
+#define VGPU_MAPPABLE_BALLOON_LOW     0
+#define VGPU_MAPPABLE_BALLOON_HIGH    1
+#define VGPU_UNMAPPABLE_BALLOON_LOW   2
+#define VGPU_UNMAPPABLE_BALLOON_HIGH  3
+#define VGPU_MAX_BALLOON_NUM          4
+		struct drm_mm_node space[VGPU_MAX_BALLOON_NUM];
+	} bl_info;
 };
 
 /* used in computing the new watermarks state */
diff --git a/drivers/gpu/drm/i915/i915_vgpu.c b/drivers/gpu/drm/i915/i915_vgpu.c
index 7545686..79d3df4 100644
--- a/drivers/gpu/drm/i915/i915_vgpu.c
+++ b/drivers/gpu/drm/i915/i915_vgpu.c
@@ -86,17 +86,6 @@ bool intel_vgpu_has_full_48bit_ppgtt(struct drm_i915_private *dev_priv)
 	return dev_priv->vgpu.caps & VGT_CAPS_FULL_48BIT_PPGTT;
 }
 
-struct _balloon_info_ {
-	/*
-	 * There are up to 2 regions per mappable/unmappable graphic
-	 * memory that might be ballooned. Here, index 0/1 is for mappable
-	 * graphic memory, 2/3 for unmappable graphic memory.
-	 */
-	struct drm_mm_node space[4];
-};
-
-static struct _balloon_info_ bl_info;
-
 static void vgt_deballoon_space(struct i915_ggtt *ggtt,
 				struct drm_mm_node *node)
 {
@@ -128,8 +117,9 @@ void intel_vgt_deballoon(struct drm_i915_private *dev_priv)
 
 	DRM_DEBUG("VGT deballoon.\n");
 
-	for (i = 0; i < 4; i++)
-		vgt_deballoon_space(&dev_priv->ggtt, &bl_info.space[i]);
+	for (i = 0; i < VGPU_MAX_BALLOON_NUM; i++)
+		vgt_deballoon_space(&dev_priv->ggtt,
+				    &dev_priv->vgpu.bl_info.space[i]);
 }
 
 static int vgt_balloon_space(struct i915_ggtt *ggtt,
@@ -200,6 +190,7 @@ static int vgt_balloon_space(struct i915_ggtt *ggtt,
 int intel_vgt_balloon(struct drm_i915_private *dev_priv)
 {
 	struct i915_ggtt *ggtt = &dev_priv->ggtt;
+	struct balloon_info *bl_info;
 	unsigned long ggtt_end = ggtt->base.total;
 
 	unsigned long mappable_base, mappable_size, mappable_end;
@@ -230,34 +221,39 @@ int intel_vgt_balloon(struct drm_i915_private *dev_priv)
 		return -EINVAL;
 	}
 
+	bl_info = &dev_priv->vgpu.bl_info;
 	/* Unmappable graphic memory ballooning */
 	if (unmappable_base > ggtt->mappable_end) {
-		ret = vgt_balloon_space(ggtt, &bl_info.space[2],
-					ggtt->mappable_end, unmappable_base);
+		ret = vgt_balloon_space(ggtt,
+			&bl_info->space[VGPU_UNMAPPABLE_BALLOON_LOW],
+			ggtt->mappable_end, unmappable_base);
 
 		if (ret)
 			goto err;
 	}
 
 	if (unmappable_end < ggtt_end) {
-		ret = vgt_balloon_space(ggtt, &bl_info.space[3],
-					unmappable_end, ggtt_end);
+		ret = vgt_balloon_space(ggtt,
+			&bl_info->space[VGPU_UNMAPPABLE_BALLOON_HIGH],
+			unmappable_end, ggtt_end);
 		if (ret)
 			goto err_upon_mappable;
 	}
 
 	/* Mappable graphic memory ballooning */
 	if (mappable_base) {
-		ret = vgt_balloon_space(ggtt, &bl_info.space[0],
-					0, mappable_base);
+		ret = vgt_balloon_space(ggtt,
+			&bl_info->space[VGPU_MAPPABLE_BALLOON_LOW],
+			0, mappable_base);
 
 		if (ret)
 			goto err_upon_unmappable;
 	}
 
 	if (mappable_end < ggtt->mappable_end) {
-		ret = vgt_balloon_space(ggtt, &bl_info.space[1],
-					mappable_end, ggtt->mappable_end);
+		ret = vgt_balloon_space(ggtt,
+			&bl_info->space[VGPU_MAPPABLE_BALLOON_HIGH],
+			mappable_end, ggtt->mappable_end);
 
 		if (ret)
 			goto err_below_mappable;
@@ -267,11 +263,14 @@ int intel_vgt_balloon(struct drm_i915_private *dev_priv)
 	return 0;
 
 err_below_mappable:
-	vgt_deballoon_space(ggtt, &bl_info.space[0]);
+	vgt_deballoon_space(ggtt,
+		&bl_info->space[VGPU_MAPPABLE_BALLOON_LOW]);
 err_upon_unmappable:
-	vgt_deballoon_space(ggtt, &bl_info.space[3]);
+	vgt_deballoon_space(ggtt,
+		&bl_info->space[VGPU_UNMAPPABLE_BALLOON_HIGH]);
 err_upon_mappable:
-	vgt_deballoon_space(ggtt, &bl_info.space[2]);
+	vgt_deballoon_space(ggtt,
+		&bl_info->space[VGPU_UNMAPPABLE_BALLOON_LOW]);
 err:
 	DRM_ERROR("VGT balloon fail\n");
 	return ret;
-- 
2.7.4