1 /* $OpenBSD: dma-buf.h,v 1.1 2019/04/14 10:14:53 jsg Exp $ */ 2 /* 3 * Copyright (c) 2018 Mark Kettenis 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #ifndef _LINUX_DMA_BUF_H 19 #define _LINUX_DMA_BUF_H 20 21 #include <sys/types.h> 22 #include <sys/systm.h> 23 #include <linux/reservation.h> 24 25 struct dma_buf_ops; 26 27 struct dma_buf { 28 const struct dma_buf_ops *ops; 29 void *priv; 30 size_t size; 31 struct file *file; 32 }; 33 34 struct dma_buf_attachment; 35 36 void get_dma_buf(struct dma_buf *); 37 struct dma_buf *dma_buf_get(int); 38 void dma_buf_put(struct dma_buf *); 39 int dma_buf_fd(struct dma_buf *, int); 40 41 struct dma_buf_ops { 42 void (*release)(struct dma_buf *); 43 }; 44 45 struct dma_buf_export_info { 46 const struct dma_buf_ops *ops; 47 size_t size; 48 int flags; 49 void *priv; 50 struct reservation_object *resv; 51 }; 52 53 #define DEFINE_DMA_BUF_EXPORT_INFO(x) struct dma_buf_export_info x 54 55 struct dma_buf *dma_buf_export(const struct dma_buf_export_info *); 56 57 #define dma_buf_attach(x, y) NULL 58 #define dma_buf_detach(x, y) panic("dma_buf_detach") 59 60 #endif 61