Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 90 insertions, 0 deletions

diff --git a/include/linux/dma-fence-array.h b/include/linux/dma-fence-array.h
new file mode 100644
index 000000000..ec7f25def
--- /dev/null
+++ b/include/linux/dma-fence-array.h
@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * fence-array: aggregates fence to be waited together
+ *
+ * Copyright (C) 2016 Collabora Ltd
+ * Copyright (C) 2016 Advanced Micro Devices, Inc.
+ * Authors:
+ *	Gustavo Padovan <gustavo@padovan.org>
+ *	Christian König <christian.koenig@amd.com>
+ */
+
+#ifndef __LINUX_DMA_FENCE_ARRAY_H
+#define __LINUX_DMA_FENCE_ARRAY_H
+
+#include <linux/dma-fence.h>
+#include <linux/irq_work.h>
+
+/**
+ * struct dma_fence_array_cb - callback helper for fence array
+ * @cb: fence callback structure for signaling
+ * @array: reference to the parent fence array object
+ */
+struct dma_fence_array_cb {
+	struct dma_fence_cb cb;
+	struct dma_fence_array *array;
+};
+
+/**
+ * struct dma_fence_array - fence to represent an array of fences
+ * @base: fence base class
+ * @lock: spinlock for fence handling
+ * @num_fences: number of fences in the array
+ * @num_pending: fences in the array still pending
+ * @fences: array of the fences
+ * @work: internal irq_work function
+ */
+struct dma_fence_array {
+	struct dma_fence base;
+
+	spinlock_t lock;
+	unsigned num_fences;
+	atomic_t num_pending;
+	struct dma_fence **fences;
+
+	struct irq_work work;
+};
+
+/**
+ * to_dma_fence_array - cast a fence to a dma_fence_array
+ * @fence: fence to cast to a dma_fence_array
+ *
+ * Returns NULL if the fence is not a dma_fence_array,
+ * or the dma_fence_array otherwise.
+ */
+static inline struct dma_fence_array *
+to_dma_fence_array(struct dma_fence *fence)
+{
+	if (!fence || !dma_fence_is_array(fence))
+		return NULL;
+
+	return container_of(fence, struct dma_fence_array, base);
+}
+
+/**
+ * dma_fence_array_for_each - iterate over all fences in array
+ * @fence: current fence
+ * @index: index into the array
+ * @head: potential dma_fence_array object
+ *
+ * Test if @array is a dma_fence_array object and if yes iterate over all fences
+ * in the array. If not just iterate over the fence in @array itself.
+ *
+ * For a deep dive iterator see dma_fence_unwrap_for_each().
+ */
+#define dma_fence_array_for_each(fence, index, head)			\
+	for (index = 0, fence = dma_fence_array_first(head); fence;	\
+	     ++(index), fence = dma_fence_array_next(head, index))
+
+struct dma_fence_array *dma_fence_array_create(int num_fences,
+					       struct dma_fence **fences,
+					       u64 context, unsigned seqno,
+					       bool signal_on_any);
+
+bool dma_fence_match_context(struct dma_fence *fence, u64 context);
+
+struct dma_fence *dma_fence_array_first(struct dma_fence *head);
+struct dma_fence *dma_fence_array_next(struct dma_fence *head,
+				       unsigned int index);
+
+#endif /* __LINUX_DMA_FENCE_ARRAY_H */