[RFC 1/9] dma-fence: Move i915 helpers into common

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Unhide some i915 helpers which are used for splitting the signalled
check vs notification stages during en masse fence processing.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 drivers/dma-buf/dma-fence.c                 | 35 +++++++++++++++------
 drivers/gpu/drm/i915/gt/intel_breadcrumbs.c | 22 -------------
 include/linux/dma-fence.h                   |  4 +++
 3 files changed, 30 insertions(+), 31 deletions(-)

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 0de0482cd36e..41da0da17eba 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -344,6 +344,30 @@ void __dma_fence_might_wait(void)
 }
 #endif
 
+void __dma_fence_signal__timestamp(struct dma_fence *fence, ktime_t timestamp)
+{
+	lockdep_assert_held(fence->lock);
+
+	fence->timestamp = timestamp;
+	set_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags);
+	trace_dma_fence_signaled(fence);
+}
+EXPORT_SYMBOL(__dma_fence_signal__timestamp);
+
+void
+__dma_fence_signal__notify(struct dma_fence *fence,
+			   const struct list_head *list)
+{
+	struct dma_fence_cb *cur, *tmp;
+
+	lockdep_assert_held(fence->lock);
+
+	list_for_each_entry_safe(cur, tmp, list, node) {
+		INIT_LIST_HEAD(&cur->node);
+		cur->func(fence, cur);
+	}
+}
+EXPORT_SYMBOL(__dma_fence_signal__notify);
 
 /**
  * dma_fence_signal_timestamp_locked - signal completion of a fence
@@ -366,7 +390,6 @@ void __dma_fence_might_wait(void)
 int dma_fence_signal_timestamp_locked(struct dma_fence *fence,
 				      ktime_t timestamp)
 {
-	struct dma_fence_cb *cur, *tmp;
 	struct list_head cb_list;
 
 	lockdep_assert_held(fence->lock);
@@ -378,14 +401,8 @@ int dma_fence_signal_timestamp_locked(struct dma_fence *fence,
 	/* Stash the cb_list before replacing it with the timestamp */
 	list_replace(&fence->cb_list, &cb_list);
 
-	fence->timestamp = timestamp;
-	set_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags);
-	trace_dma_fence_signaled(fence);
-
-	list_for_each_entry_safe(cur, tmp, &cb_list, node) {
-		INIT_LIST_HEAD(&cur->node);
-		cur->func(fence, cur);
-	}
+	__dma_fence_signal__timestamp(fence, timestamp);
+	__dma_fence_signal__notify(fence, &cb_list);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c b/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c
index ecc990ec1b95..26b6b777c479 100644
--- a/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c
@@ -127,28 +127,6 @@ __dma_fence_signal(struct dma_fence *fence)
 	return !test_and_set_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags);
 }
 
-static void
-__dma_fence_signal__timestamp(struct dma_fence *fence, ktime_t timestamp)
-{
-	fence->timestamp = timestamp;
-	set_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags);
-	trace_dma_fence_signaled(fence);
-}
-
-static void
-__dma_fence_signal__notify(struct dma_fence *fence,
-			   const struct list_head *list)
-{
-	struct dma_fence_cb *cur, *tmp;
-
-	lockdep_assert_held(fence->lock);
-
-	list_for_each_entry_safe(cur, tmp, list, node) {
-		INIT_LIST_HEAD(&cur->node);
-		cur->func(fence, cur);
-	}
-}
-
 static void add_retire(struct intel_breadcrumbs *b, struct intel_timeline *tl)
 {
 	if (b->irq_engine)
diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h
index 775cdc0b4f24..2af328a89468 100644
--- a/include/linux/dma-fence.h
+++ b/include/linux/dma-fence.h
@@ -367,6 +367,10 @@ static inline void dma_fence_end_signalling(bool cookie) {}
 static inline void __dma_fence_might_wait(void) {}
 #endif
 
+void __dma_fence_signal__timestamp(struct dma_fence *fence, ktime_t timestamp);
+void __dma_fence_signal__notify(struct dma_fence *fence,
+				const struct list_head *list);
+
 int dma_fence_signal(struct dma_fence *fence);
 int dma_fence_signal_locked(struct dma_fence *fence);
 int dma_fence_signal_timestamp(struct dma_fence *fence, ktime_t timestamp);
-- 
2.34.1