[PATCH 4/9] drm/amdgpu: switch to common fence_wait_any_timeout v2

[Christian König]

From: Christian König <christian.koenig at amd.com>

No need to duplicate the functionality any more.

v2: fix handling if no fence is available.

Signed-off-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com> (v1)
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h       |  4 --
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 98 -------------------------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c    | 20 ++++---
 3 files changed, 13 insertions(+), 109 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index a9c0def..dd7d2ce 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -447,10 +447,6 @@ int amdgpu_fence_wait_next(struct amdgpu_ring *ring);
 int amdgpu_fence_wait_empty(struct amdgpu_ring *ring);
 unsigned amdgpu_fence_count_emitted(struct amdgpu_ring *ring);
 
-signed long amdgpu_fence_wait_any(struct fence **array,
-				  uint32_t count,
-				  bool intr,
-				  signed long t);
 struct amdgpu_fence *amdgpu_fence_ref(struct amdgpu_fence *fence);
 void amdgpu_fence_unref(struct amdgpu_fence **fence);
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
index 663caa9..c4bb282 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
@@ -822,104 +822,6 @@ static const char *amdgpu_fence_get_timeline_name(struct fence *f)
 	return (const char *)fence->ring->name;
 }
 
-static bool amdgpu_test_signaled_any(struct fence **fences, uint32_t count)
-{
-	int idx;
-	struct fence *fence;
-
-	for (idx = 0; idx < count; ++idx) {
-		fence = fences[idx];
-		if (fence) {
-			if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->flags))
-				return true;
-		}
-	}
-	return false;
-}
-
-struct amdgpu_wait_cb {
-	struct fence_cb base;
-	struct task_struct *task;
-};
-
-static void amdgpu_fence_wait_cb(struct fence *fence, struct fence_cb *cb)
-{
-	struct amdgpu_wait_cb *wait =
-		container_of(cb, struct amdgpu_wait_cb, base);
-	wake_up_process(wait->task);
-}
-
-/**
- * Wait the fence array with timeout
- *
- * @array:    the fence array with amdgpu fence pointer
- * @count:    the number of the fence array
- * @intr:     when sleep, set the current task interruptable or not
- * @t:        timeout to wait
- *
- * It will return when any fence is signaled or timeout.
- */
-signed long amdgpu_fence_wait_any(struct fence **array, uint32_t count,
-				  bool intr, signed long t)
-{
-	struct amdgpu_wait_cb *cb;
-	struct fence *fence;
-	unsigned idx;
-
-	BUG_ON(!array);
-
-	cb = kcalloc(count, sizeof(struct amdgpu_wait_cb), GFP_KERNEL);
-	if (cb == NULL) {
-		t = -ENOMEM;
-		goto err_free_cb;
-	}
-
-	for (idx = 0; idx < count; ++idx) {
-		fence = array[idx];
-		if (fence) {
-			cb[idx].task = current;
-			if (fence_add_callback(fence,
-					&cb[idx].base, amdgpu_fence_wait_cb)) {
-				/* The fence is already signaled */
-				goto fence_rm_cb;
-			}
-		}
-	}
-
-	while (t > 0) {
-		if (intr)
-			set_current_state(TASK_INTERRUPTIBLE);
-		else
-			set_current_state(TASK_UNINTERRUPTIBLE);
-
-		/*
-		 * amdgpu_test_signaled_any must be called after
-		 * set_current_state to prevent a race with wake_up_process
-		 */
-		if (amdgpu_test_signaled_any(array, count))
-			break;
-
-		t = schedule_timeout(t);
-
-		if (t > 0 && intr && signal_pending(current))
-			t = -ERESTARTSYS;
-	}
-
-	__set_current_state(TASK_RUNNING);
-
-fence_rm_cb:
-	for (idx = 0; idx < count; ++idx) {
-		fence = array[idx];
-		if (fence && cb[idx].base.func)
-			fence_remove_callback(fence, &cb[idx].base);
-	}
-
-err_free_cb:
-	kfree(cb);
-
-	return t;
-}
-
 const struct fence_ops amdgpu_fence_ops = {
 	.get_driver_name = amdgpu_fence_get_driver_name,
 	.get_timeline_name = amdgpu_fence_get_timeline_name,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
index 5cb27d5..3f48759 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
@@ -337,6 +337,7 @@ int amdgpu_sa_bo_new(struct amdgpu_device *adev,
 {
 	struct fence *fences[AMDGPU_MAX_RINGS];
 	unsigned tries[AMDGPU_MAX_RINGS];
+	unsigned count;
 	int i, r;
 	signed long t;
 
@@ -371,13 +372,18 @@ int amdgpu_sa_bo_new(struct amdgpu_device *adev,
 			/* see if we can skip over some allocations */
 		} while (amdgpu_sa_bo_next_hole(sa_manager, fences, tries));
 
-		spin_unlock(&sa_manager->wq.lock);
-		t = amdgpu_fence_wait_any(fences, AMDGPU_MAX_RINGS,
-					  false, MAX_SCHEDULE_TIMEOUT);
-		r = (t > 0) ? 0 : t;
-		spin_lock(&sa_manager->wq.lock);
-		/* if we have nothing to wait for block */
-		if (r == -ENOENT) {
+		for (i = 0, count = 0; i < AMDGPU_MAX_RINGS; ++i)
+			if (fences[i])
+				fences[count++] = fences[i];
+
+		if (count) {
+			spin_unlock(&sa_manager->wq.lock);
+			t = fence_wait_any_timeout(fences, count, false,
+						   MAX_SCHEDULE_TIMEOUT);
+			r = (t > 0) ? 0 : t;
+			spin_lock(&sa_manager->wq.lock);
+		} else {
+			/* if we have nothing to wait for block */
 			r = wait_event_interruptible_locked(
 				sa_manager->wq,
 				amdgpu_sa_event(sa_manager, size, align)
-- 
1.9.1