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      1 /*	$NetBSD: dma-fence-array.h,v 1.6 2021/12/19 12:23:50 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef	_LINUX_DMA_FENCE_ARRAY_H_
     33 #define	_LINUX_DMA_FENCE_ARRAY_H_
     34 
     35 #include <sys/stdbool.h>
     36 
     37 #include <linux/dma-fence.h>
     38 #include <linux/irq_work.h>
     39 
     40 #define	dma_fence_array_create		linux_dma_fence_array_create
     41 #define	dma_fence_is_array		linux_dma_fence_is_array
     42 #define	to_dma_fence_array		linux_to_dma_fence_array
     43 
     44 struct dma_fence_array_cb {
     45 	struct dma_fence_array	*dfac_array;
     46 	struct dma_fence_cb	dfac_cb;
     47 };
     48 
     49 struct dma_fence_array {
     50 	struct dma_fence		base;
     51 	struct dma_fence		**fences;
     52 	unsigned			num_fences;
     53 
     54 	spinlock_t			dfa_lock;
     55 	int				dfa_npending;
     56 	struct irq_work			dfa_work;
     57 	struct dma_fence_array_cb	dfa_cb[];
     58 };
     59 
     60 struct dma_fence_array *
     61 	dma_fence_array_create(int, struct dma_fence **, unsigned, unsigned,
     62 	    bool);
     63 
     64 bool	dma_fence_is_array(struct dma_fence *);
     65 struct dma_fence_array *
     66 	to_dma_fence_array(struct dma_fence *);
     67 
     68 #endif	/* _LINUX_DMA_FENCE_ARRAY_H_ */
     69