[Intel-gfx] [RFCv3 15/15] drm/i915: expose i915_find_fence_reg()

[Zhi Wang]

Expose i915_find_fence_reg() for GVT-g to allocate the fence registers
for vGPUs.

Signed-off-by: Zhi Wang <zhi.a.wang at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h       |  1 +
 drivers/gpu/drm/i915/i915_gem_fence.c | 10 +++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index deb7143b..67c953a 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3248,6 +3248,7 @@ i915_gem_object_ggtt_unpin(struct drm_i915_gem_object *obj)
 int __must_check i915_gem_object_get_fence(struct drm_i915_gem_object *obj);
 int __must_check i915_gem_object_put_fence(struct drm_i915_gem_object *obj);
 int i915_steal_fence(struct drm_i915_fence_reg *reg);
+struct drm_i915_fence_reg *i915_find_fence_reg(struct drm_device *dev);
 
 bool i915_gem_object_pin_fence(struct drm_i915_gem_object *obj);
 void i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj);
diff --git a/drivers/gpu/drm/i915/i915_gem_fence.c b/drivers/gpu/drm/i915/i915_gem_fence.c
index dd897c6..38da3f3 100644
--- a/drivers/gpu/drm/i915/i915_gem_fence.c
+++ b/drivers/gpu/drm/i915/i915_gem_fence.c
@@ -308,7 +308,15 @@ i915_gem_object_put_fence(struct drm_i915_gem_object *obj)
 	return 0;
 }
 
-static struct drm_i915_fence_reg *
+/**
+ * i915_find_fence_reg - find a free or unpinned fence register
+ * @dev: drm device
+ *
+ * Returns:
+ *
+ * pointer to fence register on success, error code in pointer on failure.
+ */
+struct drm_i915_fence_reg *
 i915_find_fence_reg(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-- 
1.9.1