drm/i915: Refactor userfault_wakeref to re-use

Refactor userfault_wakeref to re-use for discrete lmem mmap mapping
as well, as on discrete GTT mmap are not supported. Moving
userfault_wakeref from ggtt to gt structure.
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220913152714.16541-2-anshuman.gupta@intel.com

drivers/gpu/drm/i915/gem/i915_gem_mman.c

@@ -413,7 +413,7 @@ static vm_fault_t vm_fault_gtt(struct vm_fault *vmf)
 	vma->mmo = mmo;
 
 	if (CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND)
-		intel_wakeref_auto(&to_gt(i915)->ggtt->userfault_wakeref,
+		intel_wakeref_auto(&to_gt(i915)->userfault_wakeref,
 				   msecs_to_jiffies_timeout(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND));
 
 	if (write) {

drivers/gpu/drm/i915/gem/i915_gem_pm.c

@@ -24,7 +24,7 @@ void i915_gem_suspend(struct drm_i915_private *i915)
 {
 	GEM_TRACE("%s\n", dev_name(i915->drm.dev));
 
-	intel_wakeref_auto(&to_gt(i915)->ggtt->userfault_wakeref, 0);
+	intel_wakeref_auto(&to_gt(i915)->userfault_wakeref, 0);
 	flush_workqueue(i915->wq);
 
 	/*

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

@@ -842,7 +842,6 @@ void intel_ggtt_init_fences(struct i915_ggtt *ggtt)
 
 	INIT_LIST_HEAD(&ggtt->fence_list);
 	INIT_LIST_HEAD(&ggtt->userfault_list);
-	intel_wakeref_auto_init(&ggtt->userfault_wakeref, uncore->rpm);
 
 	detect_bit_6_swizzle(ggtt);
 

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

@@ -804,6 +804,7 @@ static int intel_gt_tile_setup(struct intel_gt *gt, phys_addr_t phys_addr)
 	}
 
 	intel_uncore_init_early(gt->uncore, gt);
+	intel_wakeref_auto_init(&gt->userfault_wakeref, gt->uncore->rpm);
 
 	ret = intel_uncore_setup_mmio(gt->uncore, phys_addr);
 	if (ret)

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

@@ -156,6 +156,9 @@ struct intel_gt {
 	 */
 	intel_wakeref_t awake;
 
+	/* Manual runtime pm autosuspend delay for user GGTT/lmem mmaps */
+	struct intel_wakeref_auto userfault_wakeref;
+
 	u32 clock_frequency;
 	u32 clock_period_ns;
 

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

@@ -386,9 +386,6 @@ struct i915_ggtt {
 	 */
 	struct list_head userfault_list;
 
-	/* Manual runtime pm autosuspend delay for user GGTT mmaps */
-	struct intel_wakeref_auto userfault_wakeref;
-
 	struct mutex error_mutex;
 	struct drm_mm_node error_capture;
 	struct drm_mm_node uc_fw;

drivers/gpu/drm/i915/i915_gem.c

@@ -1173,7 +1173,7 @@ void i915_gem_driver_unregister(struct drm_i915_private *i915)
 
 void i915_gem_driver_remove(struct drm_i915_private *dev_priv)
 {
-	intel_wakeref_auto_fini(&to_gt(dev_priv)->ggtt->userfault_wakeref);
+	intel_wakeref_auto_fini(&to_gt(dev_priv)->userfault_wakeref);
 
 	i915_gem_suspend_late(dev_priv);
 	intel_gt_driver_remove(to_gt(dev_priv));