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 | |