1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * dma-bufs for virtio exported objects
4 *
5 * Copyright (C) 2020 Google, Inc.
6 */
7
8 #ifndef _LINUX_VIRTIO_DMA_BUF_H
9 #define _LINUX_VIRTIO_DMA_BUF_H
10
11 #include <linux/dma-buf.h>
12 #include <linux/uuid.h>
13 #include <linux/virtio.h>
14
15 /**
16 * struct virtio_dma_buf_ops - operations possible on exported object dma-buf
17 * @ops: the base dma_buf_ops. ops.attach MUST be virtio_dma_buf_attach.
18 * @device_attach: [optional] callback invoked by virtio_dma_buf_attach during
19 * all attach operations.
20 * @get_uid: [required] callback to get the uuid of the exported object.
21 */
22 struct virtio_dma_buf_ops {
23 struct dma_buf_ops ops;
24 int (*device_attach)(struct dma_buf *dma_buf,
25 struct dma_buf_attachment *attach);
26 int (*get_uuid)(struct dma_buf *dma_buf, uuid_t *uuid);
27 };
28
29 int virtio_dma_buf_attach(struct dma_buf *dma_buf,
30 struct dma_buf_attachment *attach);
31
32 struct dma_buf *virtio_dma_buf_export
33 (const struct dma_buf_export_info *exp_info);
34 bool is_virtio_dma_buf(struct dma_buf *dma_buf);
35 int virtio_dma_buf_get_uuid(struct dma_buf *dma_buf, uuid_t *uuid);
36
37 #endif /* _LINUX_VIRTIO_DMA_BUF_H */
38
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