[PATCH v4 3/9] dma-fence: Add helpers for accessing driver and timeline name

[Tvrtko Ursulin]

Add some helpers in order to enable preventing dma-fence users accessing
the implementation details directly and make the implementation itself use
them.

This will also enable later adding some asserts to a consolidated
location.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at igalia.com>
Reviewed-by: Christian König <christian.koenig at amd.com>
---
 drivers/dma-buf/dma-fence.c      |  9 +++++----
 include/linux/dma-fence.h        | 10 ++++++++++
 include/trace/events/dma_fence.h |  4 ++--
 3 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 705b59787731..74f9e4b665e3 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -538,8 +538,8 @@ void dma_fence_release(struct kref *kref)
 	if (WARN(!list_empty(&fence->cb_list) &&
 		 !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags),
 		 "Fence %s:%s:%llx:%llx released with pending signals!\n",
-		 fence->ops->get_driver_name(fence),
-		 fence->ops->get_timeline_name(fence),
+		 dma_fence_driver_name(fence),
+		 dma_fence_timeline_name(fence),
 		 fence->context, fence->seqno)) {
 		unsigned long flags;
 
@@ -983,8 +983,9 @@ EXPORT_SYMBOL(dma_fence_set_deadline);
 void dma_fence_describe(struct dma_fence *fence, struct seq_file *seq)
 {
 	seq_printf(seq, "%s %s seq %llu %ssignalled\n",
-		   fence->ops->get_driver_name(fence),
-		   fence->ops->get_timeline_name(fence), fence->seqno,
+		   dma_fence_driver_name(fence),
+		   dma_fence_timeline_name(fence),
+		   fence->seqno,
 		   dma_fence_is_signaled(fence) ? "" : "un");
 }
 EXPORT_SYMBOL(dma_fence_describe);
diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h
index a34a0dcdc446..c5ac37e10d85 100644
--- a/include/linux/dma-fence.h
+++ b/include/linux/dma-fence.h
@@ -377,6 +377,16 @@ bool dma_fence_remove_callback(struct dma_fence *fence,
 			       struct dma_fence_cb *cb);
 void dma_fence_enable_sw_signaling(struct dma_fence *fence);
 
+static inline const char *dma_fence_driver_name(struct dma_fence *fence)
+{
+	return fence->ops->get_driver_name(fence);
+}
+
+static inline const char *dma_fence_timeline_name(struct dma_fence *fence)
+{
+	return fence->ops->get_timeline_name(fence);
+}
+
 /**
  * dma_fence_is_signaled_locked - Return an indication if the fence
  *                                is signaled yet.
diff --git a/include/trace/events/dma_fence.h b/include/trace/events/dma_fence.h
index a4de3df8500b..84c83074ee81 100644
--- a/include/trace/events/dma_fence.h
+++ b/include/trace/events/dma_fence.h
@@ -16,8 +16,8 @@ DECLARE_EVENT_CLASS(dma_fence,
 	TP_ARGS(fence),
 
 	TP_STRUCT__entry(
-		__string(driver, fence->ops->get_driver_name(fence))
-		__string(timeline, fence->ops->get_timeline_name(fence))
+		__string(driver, dma_fence_driver_name(fence))
+		__string(timeline, dma_fence_timeline_name(fence))
 		__field(unsigned int, context)
 		__field(unsigned int, seqno)
 	),
-- 
2.48.0