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932d656217
Add UAPI and IOCTLs for dma-buf grant device driver extension: the extension allows userspace processes and kernel modules to use Xen backed dma-buf implementation. With this extension grant references to the pages of an imported dma-buf can be exported for other domain use and grant references coming from a foreign domain can be converted into a local dma-buf for local export. Implement basic initialization and stubs for Xen DMA buffers' support. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
34 lines
930 B
C
34 lines
930 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Xen dma-buf functionality for gntdev.
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*
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* Copyright (c) 2018 Oleksandr Andrushchenko, EPAM Systems Inc.
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*/
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#ifndef _GNTDEV_DMABUF_H
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#define _GNTDEV_DMABUF_H
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#include <xen/gntdev.h>
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struct gntdev_dmabuf_priv;
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struct gntdev_priv;
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struct gntdev_dmabuf_priv *gntdev_dmabuf_init(void);
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void gntdev_dmabuf_fini(struct gntdev_dmabuf_priv *priv);
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long gntdev_ioctl_dmabuf_exp_from_refs(struct gntdev_priv *priv, int use_ptemod,
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struct ioctl_gntdev_dmabuf_exp_from_refs __user *u);
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long gntdev_ioctl_dmabuf_exp_wait_released(struct gntdev_priv *priv,
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struct ioctl_gntdev_dmabuf_exp_wait_released __user *u);
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long gntdev_ioctl_dmabuf_imp_to_refs(struct gntdev_priv *priv,
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struct ioctl_gntdev_dmabuf_imp_to_refs __user *u);
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long gntdev_ioctl_dmabuf_imp_release(struct gntdev_priv *priv,
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struct ioctl_gntdev_dmabuf_imp_release __user *u);
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#endif
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