drm/radeon: add radeon_fence_count_emited function

Split counting of emited fences out of power
management into a seperate function.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index 69902e623cb..9e7f8921714 100644
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -368,6 +368,27 @@ void radeon_fence_process(struct radeon_device *rdev, int ring)
         }
 }
 
+int radeon_fence_count_emitted(struct radeon_device *rdev, int ring)
+{
+        unsigned long irq_flags;
+        int not_processed = 0;
+
+        read_lock_irqsave(&rdev->fence_lock, irq_flags);
+        if (!rdev->fence_drv[ring].initialized)
+                return 0;
+
+        if (!list_empty(&rdev->fence_drv[ring].emitted)) {
+                struct list_head *ptr;
+                list_for_each(ptr, &rdev->fence_drv[ring].emitted) {
+                        /* count up to 3, that's enought info */
+                        if (++not_processed >= 3)
+                                break;
+                }
+        }
+        read_unlock_irqrestore(&rdev->fence_lock, irq_flags);
+        return not_processed;
+}
+
 int radeon_fence_driver_init(struct radeon_device *rdev, int num_rings)
 {
         unsigned long irq_flags;