drm/i915: Move intel_gt initialization to a separate file

As it will grow in a following patch make a new home for it.

v2:
 * Convert mock_gem_device as well. (Chris)

v3:
 * Rename to intel_gt_init_early and move call site to i915_drv.c. (Chris)

v4:
 * Adjust SPDX tags.
 * No need to gt/ path when including intel_gt_types.h. (Chris)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190621070811.7006-3-tvrtko.ursulin@linux.intel.com

drivers/gpu/drm/i915/Makefile

@@ -74,6 +74,7 @@ gt-y += \
 	gt/intel_context.o \
 	gt/intel_engine_cs.o \
 	gt/intel_engine_pm.o \
+	gt/intel_gt.o \
 	gt/intel_gt_pm.o \
 	gt/intel_hangcheck.o \
 	gt/intel_lrc.o \

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

+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include "intel_gt.h"
+
+void intel_gt_init_early(struct intel_gt *gt)
+{
+	INIT_LIST_HEAD(&gt->active_rings);
+	INIT_LIST_HEAD(&gt->closed_vma);
+
+	spin_lock_init(&gt->closed_lock);
+}

drivers/gpu/drm/i915/gt/intel_gt.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_GT__
+#define __INTEL_GT__
+
+#include "intel_gt_types.h"
+
+void intel_gt_init_early(struct intel_gt *gt);
+
+#endif /* __INTEL_GT_H__ */

drivers/gpu/drm/i915/i915_drv.c

@@ -61,6 +61,7 @@
 
 #include "gem/i915_gem_context.h"
 #include "gem/i915_gem_ioctls.h"
+#include "gt/intel_gt.h"
 #include "gt/intel_gt_pm.h"
 #include "gt/intel_reset.h"
 #include "gt/intel_workarounds.h"
@@ -922,6 +923,8 @@ static int i915_driver_init_early(struct drm_i915_private *dev_priv)
 	if (ret < 0)
 		goto err_engines;
 
+	intel_gt_init_early(&dev_priv->gt);
+
 	ret = i915_gem_init_early(dev_priv);
 	if (ret < 0)
 		goto err_workqueues;

drivers/gpu/drm/i915/i915_gem.c

@@ -1748,10 +1748,6 @@ int i915_gem_init_early(struct drm_i915_private *dev_priv)
 
 	intel_gt_pm_init(dev_priv);
 
-	INIT_LIST_HEAD(&dev_priv->gt.active_rings);
-	INIT_LIST_HEAD(&dev_priv->gt.closed_vma);
-	spin_lock_init(&dev_priv->gt.closed_lock);
-
 	i915_gem_init__mm(dev_priv);
 	i915_gem_init__pm(dev_priv);
 

drivers/gpu/drm/i915/selftests/mock_gem_device.c

@@ -25,6 +25,7 @@
 #include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
 
+#include "gt/intel_gt.h"
 #include "gt/mock_engine.h"
 
 #include "mock_request.h"
@@ -179,6 +180,7 @@ struct drm_i915_private *mock_gem_device(void)
 
 	mock_uncore_init(&i915->uncore);
 	i915_gem_init__mm(i915);
+	intel_gt_init_early(&i915->gt);
 	intel_gt_pm_init(i915);
 	atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */
 
@@ -200,10 +202,6 @@ struct drm_i915_private *mock_gem_device(void)
 
 	i915_timelines_init(i915);
 
-	INIT_LIST_HEAD(&i915->gt.active_rings);
-	INIT_LIST_HEAD(&i915->gt.closed_vma);
-	spin_lock_init(&i915->gt.closed_lock);
-
 	mutex_lock(&i915->drm.struct_mutex);
 
 	mock_init_ggtt(i915, &i915->ggtt);