LXR linux/include/linux/virtio_dma

   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 */
  22struct 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
  29int virtio_dma_buf_attach(struct dma_buf *dma_buf,
  30                          struct dma_buf_attachment *attach);
  31
  32struct dma_buf *virtio_dma_buf_export
  33        (const struct dma_buf_export_info *exp_info);
  34bool is_virtio_dma_buf(struct dma_buf *dma_buf);
  35int virtio_dma_buf_get_uuid(struct dma_buf *dma_buf, uuid_t *uuid);
  36
  37#endif /* _LINUX_VIRTIO_DMA_BUF_H */
  38