drm/i915/vgpu: improve vgpu abstractions

Add intel_vgpu_register() abstraction, rename i915_detect_vgpu() to
intel_vgpu_detect() to match other function naming, un-inline
intel_vgpu_active(), intel_vgpu_has_full_ppgtt() and
intel_vgpu_has_huge_gtt() to reduce header interdependencies.

The i915_vgpu.[ch] filename and intel_vgpu_ prefix discrepancy remains.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200227144408.24345-1-jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_fbc.c

@@ -42,6 +42,7 @@
 
 #include "i915_drv.h"
 #include "i915_trace.h"
+#include "i915_vgpu.h"
 #include "intel_display_types.h"
 #include "intel_fbc.h"
 #include "intel_frontbuffer.h"

drivers/gpu/drm/i915/display/intel_sprite.c

@@ -40,6 +40,7 @@
 
 #include "i915_drv.h"
 #include "i915_trace.h"
+#include "i915_vgpu.h"
 #include "intel_atomic_plane.h"
 #include "intel_display_types.h"
 #include "intel_frontbuffer.h"

drivers/gpu/drm/i915/gem/i915_gem_stolen.c

@@ -13,6 +13,7 @@
 #include "gem/i915_gem_region.h"
 #include "i915_drv.h"
 #include "i915_gem_stolen.h"
+#include "i915_vgpu.h"
 
 /*
  * The BIOS typically reserves some of the system's memory for the exclusive

drivers/gpu/drm/i915/gt/gen8_ppgtt.c

@@ -8,6 +8,7 @@
 #include "gen8_ppgtt.h"
 #include "i915_scatterlist.h"
 #include "i915_trace.h"
+#include "i915_pvinfo.h"
 #include "i915_vgpu.h"
 #include "intel_gt.h"
 #include "intel_gtt.h"

drivers/gpu/drm/i915/gt/intel_rc6.c

@@ -7,6 +7,7 @@
 #include <linux/pm_runtime.h>
 
 #include "i915_drv.h"
+#include "i915_vgpu.h"
 #include "intel_gt.h"
 #include "intel_gt_pm.h"
 #include "intel_rc6.h"

drivers/gpu/drm/i915/i915_drv.c

@@ -759,13 +759,7 @@ static void i915_driver_register(struct drm_i915_private *dev_priv)
 	i915_gem_driver_register(dev_priv);
 	i915_pmu_register(dev_priv);
 
-	/*
-	 * Notify a valid surface after modesetting,
-	 * when running inside a VM.
-	 */
-	if (intel_vgpu_active(dev_priv))
-		intel_uncore_write(&dev_priv->uncore, vgtif_reg(display_ready),
-				   VGT_DRV_DISPLAY_READY);
+	intel_vgpu_register(dev_priv);
 
 	/* Reveal our presence to userspace */
 	if (drm_dev_register(dev, 0) == 0) {
@@ -972,7 +966,7 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	disable_rpm_wakeref_asserts(&i915->runtime_pm);
 
-	i915_detect_vgpu(i915);
+	intel_vgpu_detect(i915);
 
 	ret = i915_driver_mmio_probe(i915);
 	if (ret < 0)

drivers/gpu/drm/i915/i915_drv.h

@@ -1677,11 +1677,6 @@ static inline bool intel_gvt_active(struct drm_i915_private *dev_priv)
 	return dev_priv->gvt;
 }
 
-static inline bool intel_vgpu_active(struct drm_i915_private *dev_priv)
-{
-	return dev_priv->vgpu.active;
-}
-
 int i915_getparam_ioctl(struct drm_device *dev, void *data,
 			struct drm_file *file_priv);
 

drivers/gpu/drm/i915/i915_gem_fence_reg.c

@@ -23,6 +23,7 @@
 
 #include "i915_drv.h"
 #include "i915_scatterlist.h"
+#include "i915_pvinfo.h"
 #include "i915_vgpu.h"
 
 /**

drivers/gpu/drm/i915/i915_vgpu.c

@@ -21,6 +21,8 @@
  * SOFTWARE.
  */
 
+#include "i915_drv.h"
+#include "i915_pvinfo.h"
 #include "i915_vgpu.h"
 
 /**
@@ -51,13 +53,13 @@
  */
 
 /**
- * i915_detect_vgpu - detect virtual GPU
+ * intel_vgpu_detect - detect virtual GPU
  * @dev_priv: i915 device private
  *
  * This function is called at the initialization stage, to detect whether
  * running on a vGPU.
  */
-void i915_detect_vgpu(struct drm_i915_private *dev_priv)
+void intel_vgpu_detect(struct drm_i915_private *dev_priv)
 {
 	struct pci_dev *pdev = dev_priv->drm.pdev;
 	u64 magic;
@@ -102,11 +104,36 @@ void i915_detect_vgpu(struct drm_i915_private *dev_priv)
 	pci_iounmap(pdev, shared_area);
 }
 
+void intel_vgpu_register(struct drm_i915_private *i915)
+{
+	/*
+	 * Notify a valid surface after modesetting, when running inside a VM.
+	 */
+	if (intel_vgpu_active(i915))
+		intel_uncore_write(&i915->uncore, vgtif_reg(display_ready),
+				   VGT_DRV_DISPLAY_READY);
+}
+
+bool intel_vgpu_active(struct drm_i915_private *dev_priv)
+{
+	return dev_priv->vgpu.active;
+}
+
 bool intel_vgpu_has_full_ppgtt(struct drm_i915_private *dev_priv)
 {
 	return dev_priv->vgpu.caps & VGT_CAPS_FULL_PPGTT;
 }
 
+bool intel_vgpu_has_hwsp_emulation(struct drm_i915_private *dev_priv)
+{
+	return dev_priv->vgpu.caps & VGT_CAPS_HWSP_EMULATION;
+}
+
+bool intel_vgpu_has_huge_gtt(struct drm_i915_private *dev_priv)
+{
+	return dev_priv->vgpu.caps & VGT_CAPS_HUGE_GTT;
+}
+
 struct _balloon_info_ {
 	/*
 	 * There are up to 2 regions per mappable/unmappable graphic

drivers/gpu/drm/i915/i915_vgpu.h

@@ -24,24 +24,17 @@
 #ifndef _I915_VGPU_H_
 #define _I915_VGPU_H_
 
-#include "i915_drv.h"
-#include "i915_pvinfo.h"
+#include <linux/types.h>
 
-void i915_detect_vgpu(struct drm_i915_private *dev_priv);
+struct drm_i915_private;
+struct i915_ggtt;
 
-bool intel_vgpu_has_full_ppgtt(struct drm_i915_private *dev_priv);
-
-static inline bool
-intel_vgpu_has_hwsp_emulation(struct drm_i915_private *dev_priv)
-{
-	return dev_priv->vgpu.caps & VGT_CAPS_HWSP_EMULATION;
-}
-
-static inline bool
-intel_vgpu_has_huge_gtt(struct drm_i915_private *dev_priv)
-{
-	return dev_priv->vgpu.caps & VGT_CAPS_HUGE_GTT;
-}
+void intel_vgpu_detect(struct drm_i915_private *i915);
+bool intel_vgpu_active(struct drm_i915_private *i915);
+void intel_vgpu_register(struct drm_i915_private *i915);
+bool intel_vgpu_has_full_ppgtt(struct drm_i915_private *i915);
+bool intel_vgpu_has_hwsp_emulation(struct drm_i915_private *i915);
+bool intel_vgpu_has_huge_gtt(struct drm_i915_private *i915);
 
 int intel_vgt_balloon(struct i915_ggtt *ggtt);
 void intel_vgt_deballoon(struct i915_ggtt *ggtt);

drivers/gpu/drm/i915/intel_gvt.c

@@ -22,6 +22,7 @@
  */
 
 #include "i915_drv.h"
+#include "i915_vgpu.h"
 #include "intel_gvt.h"
 
 /**