drm/radeon: improve radeon_test_syncing function

Also test multiple waits on the same semaphore.
Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_test.c

@@ -239,15 +239,20 @@ void radeon_test_ring_sync(struct radeon_device *rdev,
 			   struct radeon_ring *ringA,
 			   struct radeon_ring *ringB)
 {
-	struct radeon_fence *fence = NULL;
+	struct radeon_fence *fence1 = NULL, *fence2 = NULL;
 	struct radeon_semaphore *semaphore = NULL;
 	int ridxA = radeon_ring_index(rdev, ringA);
 	int ridxB = radeon_ring_index(rdev, ringB);
 	int r;
 
-	r = radeon_fence_create(rdev, &fence, ridxA);
+	r = radeon_fence_create(rdev, &fence1, ridxA);
+	if (r) {
+		DRM_ERROR("Failed to create sync fence 1\n");
+		goto out_cleanup;
+	}
+	r = radeon_fence_create(rdev, &fence2, ridxA);
 	if (r) {
-		DRM_ERROR("Failed to create sync fence\n");
+		DRM_ERROR("Failed to create sync fence 2\n");
 		goto out_cleanup;
 	}
 
@@ -263,13 +268,15 @@ void radeon_test_ring_sync(struct radeon_device *rdev,
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_wait(rdev, ridxA, semaphore);
-	radeon_fence_emit(rdev, fence);
+	radeon_fence_emit(rdev, fence1);
+	radeon_semaphore_emit_wait(rdev, ridxA, semaphore);
+	radeon_fence_emit(rdev, fence2);
 	radeon_ring_unlock_commit(rdev, ringA);
 
 	mdelay(1000);
 
-	if (radeon_fence_signaled(fence)) {
-		DRM_ERROR("Fence signaled without waiting for semaphore.\n");
+	if (radeon_fence_signaled(fence1)) {
+		DRM_ERROR("Fence 1 signaled without waiting for semaphore.\n");
 		goto out_cleanup;
 	}
 
@@ -281,20 +288,162 @@ void radeon_test_ring_sync(struct radeon_device *rdev,
 	radeon_semaphore_emit_signal(rdev, ridxB, semaphore);
 	radeon_ring_unlock_commit(rdev, ringB);
 
-	r = radeon_fence_wait(fence, false);
+	r = radeon_fence_wait(fence1, false);
+	if (r) {
+		DRM_ERROR("Failed to wait for sync fence 1\n");
+		goto out_cleanup;
+	}
+
+	mdelay(1000);
+
+	if (radeon_fence_signaled(fence2)) {
+		DRM_ERROR("Fence 2 signaled without waiting for semaphore.\n");
+		goto out_cleanup;
+	}
+
+	r = radeon_ring_lock(rdev, ringB, 64);
 	if (r) {
-		DRM_ERROR("Failed to wait for sync fence\n");
+		DRM_ERROR("Failed to lock ring B %p\n", ringB);
 		goto out_cleanup;
 	}
+	radeon_semaphore_emit_signal(rdev, ridxB, semaphore);
+	radeon_ring_unlock_commit(rdev, ringB);
 
-	DRM_INFO("Syncing between rings %d and %d seems to work.\n", ridxA, ridxB);
+	r = radeon_fence_wait(fence2, false);
+	if (r) {
+		DRM_ERROR("Failed to wait for sync fence 1\n");
+		goto out_cleanup;
+	}
 
 out_cleanup:
 	if (semaphore)
 		radeon_semaphore_free(rdev, semaphore);
 
-	if (fence)
-		radeon_fence_unref(&fence);
+	if (fence1)
+		radeon_fence_unref(&fence1);
+
+	if (fence2)
+		radeon_fence_unref(&fence2);
+
+	if (r)
+		printk(KERN_WARNING "Error while testing ring sync (%d).\n", r);
+}
+
+void radeon_test_ring_sync2(struct radeon_device *rdev,
+			    struct radeon_ring *ringA,
+			    struct radeon_ring *ringB,
+			    struct radeon_ring *ringC)
+{
+	struct radeon_fence *fenceA = NULL, *fenceB = NULL;
+	struct radeon_semaphore *semaphore = NULL;
+	int ridxA = radeon_ring_index(rdev, ringA);
+	int ridxB = radeon_ring_index(rdev, ringB);
+	int ridxC = radeon_ring_index(rdev, ringC);
+	bool sigA, sigB;
+	int i, r;
+
+	r = radeon_fence_create(rdev, &fenceA, ridxA);
+	if (r) {
+		DRM_ERROR("Failed to create sync fence 1\n");
+		goto out_cleanup;
+	}
+	r = radeon_fence_create(rdev, &fenceB, ridxB);
+	if (r) {
+		DRM_ERROR("Failed to create sync fence 2\n");
+		goto out_cleanup;
+	}
+
+	r = radeon_semaphore_create(rdev, &semaphore);
+	if (r) {
+		DRM_ERROR("Failed to create semaphore\n");
+		goto out_cleanup;
+	}
+
+	r = radeon_ring_lock(rdev, ringA, 64);
+	if (r) {
+		DRM_ERROR("Failed to lock ring A %d\n", ridxA);
+		goto out_cleanup;
+	}
+	radeon_semaphore_emit_wait(rdev, ridxA, semaphore);
+	radeon_fence_emit(rdev, fenceA);
+	radeon_ring_unlock_commit(rdev, ringA);
+
+	r = radeon_ring_lock(rdev, ringB, 64);
+	if (r) {
+		DRM_ERROR("Failed to lock ring B %d\n", ridxB);
+		goto out_cleanup;
+	}
+	radeon_semaphore_emit_wait(rdev, ridxB, semaphore);
+	radeon_fence_emit(rdev, fenceB);
+	radeon_ring_unlock_commit(rdev, ringB);
+
+	mdelay(1000);
+
+	if (radeon_fence_signaled(fenceA)) {
+		DRM_ERROR("Fence A signaled without waiting for semaphore.\n");
+		goto out_cleanup;
+	}
+	if (radeon_fence_signaled(fenceB)) {
+		DRM_ERROR("Fence A signaled without waiting for semaphore.\n");
+		goto out_cleanup;
+	}
+
+	r = radeon_ring_lock(rdev, ringC, 64);
+	if (r) {
+		DRM_ERROR("Failed to lock ring B %p\n", ringC);
+		goto out_cleanup;
+	}
+	radeon_semaphore_emit_signal(rdev, ridxC, semaphore);
+	radeon_ring_unlock_commit(rdev, ringC);
+
+	for (i = 0; i < 30; ++i) {
+		mdelay(100);
+		sigA = radeon_fence_signaled(fenceA);
+		sigB = radeon_fence_signaled(fenceB);
+		if (sigA || sigB)
+			break;
+	}
+
+	if (!sigA && !sigB) {
+		DRM_ERROR("Neither fence A nor B has been signaled\n");
+		goto out_cleanup;
+	} else if (sigA && sigB) {
+		DRM_ERROR("Both fence A and B has been signaled\n");
+		goto out_cleanup;
+	}
+
+	DRM_INFO("Fence %c was first signaled\n", sigA ? 'A' : 'B');
+
+	r = radeon_ring_lock(rdev, ringC, 64);
+	if (r) {
+		DRM_ERROR("Failed to lock ring B %p\n", ringC);
+		goto out_cleanup;
+	}
+	radeon_semaphore_emit_signal(rdev, ridxC, semaphore);
+	radeon_ring_unlock_commit(rdev, ringC);
+
+	mdelay(1000);
+
+	r = radeon_fence_wait(fenceA, false);
+	if (r) {
+		DRM_ERROR("Failed to wait for sync fence A\n");
+		goto out_cleanup;
+	}
+	r = radeon_fence_wait(fenceB, false);
+	if (r) {
+		DRM_ERROR("Failed to wait for sync fence B\n");
+		goto out_cleanup;
+	}
+
+out_cleanup:
+	if (semaphore)
+		radeon_semaphore_free(rdev, semaphore);
+
+	if (fenceA)
+		radeon_fence_unref(&fenceA);
+
+	if (fenceB)
+		radeon_fence_unref(&fenceB);
 
 	if (r)
 		printk(KERN_WARNING "Error while testing ring sync (%d).\n", r);
@@ -302,7 +451,7 @@ void radeon_test_ring_sync(struct radeon_device *rdev,
 
 void radeon_test_syncing(struct radeon_device *rdev)
 {
-	int i, j;
+	int i, j, k;
 
 	for (i = 1; i < RADEON_NUM_RINGS; ++i) {
 		struct radeon_ring *ringA = &rdev->ring[i];
@@ -314,11 +463,33 @@ void radeon_test_syncing(struct radeon_device *rdev)
 			if (!ringB->ready)
 				continue;
 
-			DRM_INFO("Testing syncing between rings %d and %d\n", i, j);
+			DRM_INFO("Testing syncing between rings %d and %d...\n", i, j);
 			radeon_test_ring_sync(rdev, ringA, ringB);
 
-			DRM_INFO("Testing syncing between rings %d and %d\n", j, i);
+			DRM_INFO("Testing syncing between rings %d and %d...\n", j, i);
 			radeon_test_ring_sync(rdev, ringB, ringA);
+
+			for (k = 0; k < j; ++k) {
+				struct radeon_ring *ringC = &rdev->ring[k];
+
+				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", i, j, k);
+				radeon_test_ring_sync2(rdev, ringA, ringB, ringC);
+
+				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", i, k, j);
+				radeon_test_ring_sync2(rdev, ringA, ringC, ringB);
+
+				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", j, i, k);
+				radeon_test_ring_sync2(rdev, ringB, ringA, ringC);
+
+				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", j, k, i);
+				radeon_test_ring_sync2(rdev, ringB, ringC, ringA);
+
+				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", k, i, j);
+				radeon_test_ring_sync2(rdev, ringC, ringA, ringB);
+
+				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", k, j, i);
+				radeon_test_ring_sync2(rdev, ringC, ringB, ringA);
+			}
 		}
 	}
 }