drm/i915: Rename GGTT init functions

Rename and document the GGTT init functions to give a better
idea of the context where they are called from.

i915_gem_gtt_init => i915_ggtt_init_hw
i915_gem_init_global_gtt => i915_gem_init_ggtt
i915_global_gtt_cleanup => i915_ggtt_cleanup_hw

Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458830866-12578-1-git-send-email-joonas.lahtinen@linux.intel.com

drivers/gpu/drm/i915/i915_dma.c

@@ -1178,7 +1178,7 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
 
 	intel_device_info_runtime_init(dev);
 
-	ret = i915_gem_gtt_init(dev);
+	ret = i915_ggtt_init_hw(dev);
 	if (ret)
 		return ret;
 
@@ -1187,13 +1187,13 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
 	ret = i915_kick_out_firmware_fb(dev_priv);
 	if (ret) {
 		DRM_ERROR("failed to remove conflicting framebuffer drivers\n");
-		goto out_gtt;
+		goto out_ggtt;
 	}
 
 	ret = i915_kick_out_vgacon(dev_priv);
 	if (ret) {
 		DRM_ERROR("failed to remove conflicting VGA console\n");
-		goto out_gtt;
+		goto out_ggtt;
 	}
 
 	pci_set_master(dev->pdev);
@@ -1220,7 +1220,7 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
 				     aperture_size);
 	if (dev_priv->ggtt.mappable == NULL) {
 		ret = -EIO;
-		goto out_gtt;
+		goto out_ggtt;
 	}
 
 	dev_priv->ggtt.mtrr = arch_phys_wc_add(dev_priv->ggtt.mappable_base,
@@ -1253,8 +1253,8 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
 
 	return 0;
 
-out_gtt:
-	i915_global_gtt_cleanup(dev);
+out_ggtt:
+	i915_ggtt_cleanup_hw(dev);
 
 	return ret;
 }
@@ -1273,7 +1273,7 @@ static void i915_driver_cleanup_hw(struct drm_i915_private *dev_priv)
 	pm_qos_remove_request(&dev_priv->pm_qos);
 	arch_phys_wc_del(dev_priv->ggtt.mtrr);
 	io_mapping_free(dev_priv->ggtt.mappable);
-	i915_global_gtt_cleanup(dev);
+	i915_ggtt_cleanup_hw(dev);
 }
 
 /**

drivers/gpu/drm/i915/i915_gem.c

@@ -4962,7 +4962,7 @@ int i915_gem_init(struct drm_device *dev)
 	if (ret)
 		goto out_unlock;
 
-	i915_gem_init_global_gtt(dev);
+	i915_gem_init_ggtt(dev);
 
 	ret = i915_gem_context_init(dev);
 	if (ret)

drivers/gpu/drm/i915/i915_gem_gtt.c

@@ -2804,7 +2804,11 @@ static int i915_gem_setup_global_gtt(struct drm_device *dev,
 	return 0;
 }
 
-void i915_gem_init_global_gtt(struct drm_device *dev)
+/**
+ * i915_gem_init_ggtt - Initialize GEM for Global GTT
+ * @dev: DRM device
+ */
+void i915_gem_init_ggtt(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u64 gtt_size, mappable_size;
@@ -2815,7 +2819,11 @@ void i915_gem_init_global_gtt(struct drm_device *dev)
 	i915_gem_setup_global_gtt(dev, 0, mappable_size, gtt_size);
 }
 
-void i915_global_gtt_cleanup(struct drm_device *dev)
+/**
+ * i915_ggtt_cleanup_hw - Clean up GGTT hardware initialization
+ * @dev: DRM device
+ */
+void i915_ggtt_cleanup_hw(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct i915_address_space *vm = &dev_priv->ggtt.base;
@@ -3153,7 +3161,11 @@ static void i915_gmch_remove(struct i915_address_space *vm)
 	intel_gmch_remove();
 }
 
-int i915_gem_gtt_init(struct drm_device *dev)
+/**
+ * i915_ggtt_init_hw - Initialize GGTT hardware
+ * @dev: DRM device
+ */
+int i915_ggtt_init_hw(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct i915_ggtt *ggtt = &dev_priv->ggtt;

drivers/gpu/drm/i915/i915_gem_gtt.h

@@ -513,10 +513,9 @@ i915_page_dir_dma_addr(const struct i915_hw_ppgtt *ppgtt, const unsigned n)
 		px_dma(ppgtt->base.scratch_pd);
 }
 
-int i915_gem_gtt_init(struct drm_device *dev);
-void i915_gem_init_global_gtt(struct drm_device *dev);
-void i915_global_gtt_cleanup(struct drm_device *dev);
-
+int i915_ggtt_init_hw(struct drm_device *dev);
+void i915_gem_init_ggtt(struct drm_device *dev);
+void i915_ggtt_cleanup_hw(struct drm_device *dev);
 
 int i915_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt);
 int i915_ppgtt_init_hw(struct drm_device *dev);