[PATCH 13/34] drm/i915: destroy i915_gem_init_global_gtt

[Ben Widawsky <ben@bwidawsk.net>]

In continuing to make default context/aliasing PPGTT behave like any
other context/PPGTT pair this patch sets us up by moving the
context/PPGTT init to a common location.

The resulting code isn't a huge improvement, but that will change in the
next patch (at least a bit).

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_drv.h     |  4 +--
 drivers/gpu/drm/i915/i915_gem.c     | 35 +++++++++++++++++++++----
 drivers/gpu/drm/i915/i915_gem_gtt.c | 51 +------------------------------------
 3 files changed, 33 insertions(+), 57 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index f1b59b1..63f58b8 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1736,20 +1736,20 @@ int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
 				   struct drm_file *file);
 
 /* i915_gem_gtt.c */
+bool intel_enable_ppgtt(struct drm_device *dev);
+int i915_gem_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt);
 void i915_gem_cleanup_aliasing_ppgtt(struct drm_device *dev);
 void i915_ppgtt_bind_object(struct i915_hw_ppgtt *ppgtt,
 			    struct drm_i915_gem_object *obj,
 			    enum i915_cache_level cache_level);
 void i915_ppgtt_unbind_object(struct i915_hw_ppgtt *ppgtt,
 			      struct drm_i915_gem_object *obj);
-
 void i915_gem_restore_gtt_mappings(struct drm_device *dev);
 int __must_check i915_gem_gtt_prepare_object(struct drm_i915_gem_object *obj);
 void i915_gem_gtt_bind_object(struct drm_i915_gem_object *obj,
 				enum i915_cache_level cache_level);
 void i915_gem_gtt_unbind_object(struct drm_i915_gem_object *obj);
 void i915_gem_gtt_finish_object(struct drm_i915_gem_object *obj);
-void i915_gem_init_global_gtt(struct drm_device *dev);
 void i915_gem_setup_global_gtt(struct drm_device *dev, unsigned long start,
 			       unsigned long mappable_end, unsigned long end,
 			       bool guard_page);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 674154f..670694c 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4061,7 +4061,7 @@ i915_gem_init_hw(struct drm_device *dev)
 int i915_gem_init(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	int ret;
+	int ret = -ENODEV;
 
 	mutex_lock(&dev->struct_mutex);
 
@@ -4072,16 +4072,41 @@ int i915_gem_init(struct drm_device *dev)
 			DRM_DEBUG_DRIVER("allow wake ack timed out\n");
 	}
 
-	i915_gem_init_global_gtt(dev);
+	if (intel_enable_ppgtt(dev) && HAS_ALIASING_PPGTT(dev)) {
+		struct i915_hw_ppgtt *ppgtt;
+		ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
+		if (!ppgtt)
+			goto ggtt_only;
+
+
+		i915_gem_setup_global_gtt(dev, 0, dev_priv->gtt.mappable_end,
+					  dev_priv->gtt.total, false);
+		i915_gem_context_init(dev);
+		ret = i915_gem_ppgtt_init(dev, ppgtt);
+		if (ret)  {
+			kfree(ppgtt);
+			drm_mm_takedown(&dev_priv->mm.gtt_space);
+			goto ggtt_only;
+		}
 
-	i915_gem_context_init(dev);
+		dev_priv->mm.aliasing_ppgtt = ppgtt;
+	}
+
+ggtt_only:
+	if (ret) {
+		DRM_DEBUG_DRIVER("Aliased PPGTT setup failed %d\n", ret);
+		i915_gem_setup_global_gtt(dev, 0, dev_priv->gtt.mappable_end,
+					  dev_priv->gtt.total, true);
+	}
 
 	ret = i915_gem_init_hw(dev);
-	mutex_unlock(&dev->struct_mutex);
 	if (ret) {
 		i915_gem_cleanup_aliasing_ppgtt(dev);
-		return ret;
+		i915_gem_context_fini(dev);
 	}
+	mutex_unlock(&dev->struct_mutex);
+	if (ret)
+		return ret;
 
 	/* Allow hardware batchbuffers unless told otherwise, but not for KMS. */
 	if (!drm_core_check_feature(dev, DRIVER_MODESET))
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 49467c1..2ca113a 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -365,10 +365,6 @@ int i915_gem_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	int ret;
 
-	ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
-	if (!ppgtt)
-		return -ENOMEM;
-
 	ppgtt->dev = dev;
 	ppgtt->scratch_page_dma_addr = dev_priv->gtt.scratch_page_dma;
 
@@ -377,11 +373,6 @@ int i915_gem_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)
 	else
 		BUG();
 
-	if (ret)
-		kfree(ppgtt);
-	else
-		dev_priv->mm.aliasing_ppgtt = ppgtt;
-
 	return ret;
 }
 
@@ -630,7 +621,7 @@ static void i915_gtt_color_adjust(struct drm_mm_node *node,
 	}
 }
 
-static bool intel_enable_ppgtt(struct drm_device *dev)
+bool intel_enable_ppgtt(struct drm_device *dev)
 {
 	if (i915_enable_ppgtt >= 0)
 		return i915_enable_ppgtt;
@@ -705,46 +696,6 @@ void i915_gem_setup_global_gtt(struct drm_device *dev,
 		dev_priv->gtt.gtt_clear_range(dev, end / PAGE_SIZE - 1, 1);
 }
 
-void i915_gem_init_global_gtt(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	unsigned long gtt_size, mappable_size;
-	int ret = 0;
-
-	gtt_size = dev_priv->gtt.total;
-	mappable_size = dev_priv->gtt.mappable_end;
-
-	if (intel_enable_ppgtt(dev) && HAS_ALIASING_PPGTT(dev)) {
-		struct i915_hw_ppgtt *ppgtt;
-
-		i915_gem_setup_global_gtt(dev, 0, mappable_size, gtt_size,
-					  false);
-
-		ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
-		if (!ppgtt) {
-			ret = -ENOMEM;
-			goto ggtt_only;
-		}
-
-		ret = i915_gem_ppgtt_init(dev, ppgtt);
-		if (ret)
-			goto ggtt_only;
-
-		return;
-	}
-
-/* XXX: We need to takedown the drm_mm and have this fall back because of the
- * conditional use of the guard page.
- * TODO: It's a bit hackish and could use cleanup.
- */
-ggtt_only:
-	if (ret) {
-		DRM_ERROR("Aliased PPGTT setup failed %d\n", ret);
-		drm_mm_takedown(&dev_priv->mm.gtt_space);
-	}
-	i915_gem_setup_global_gtt(dev, 0, mappable_size, gtt_size, true);
-}
-
 static int setup_scratch_page(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-- 
1.8.2.3