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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (c) 2019, Nutanix Inc. All rights reserved.
*
* Author: Thanos Makatos <thanos@nutanix.com>
* Swapnil Ingle <swapnil.ingle@nutanix.com>
* Felipe Franciosi <felipe@nutanix.com>
*
*/
#ifndef _UAPI_LINUX_MUSER_H
#define _UAPI_LINUX_MUSER_H
#ifndef __KERNEL__
#include <sys/types.h>
#endif
#include <linux/ioctl.h>
#include <linux/vfio.h>
#define MUSER_DEVNODE "muser"
enum muser_cmd_type {
MUSER_IOCTL = 1,
MUSER_READ,
MUSER_WRITE,
MUSER_MMAP,
MUSER_DMA_MMAP,
MUSER_DMA_MUNMAP,
};
struct muser_cmd_rw {
size_t count;
loff_t pos;
char *buf; /* only used for write */
};
struct muser_cmd_ioctl {
int vfio_cmd;
union {
struct vfio_device_info dev_info;
struct vfio_region_info reg_info;
struct vfio_irq_info irq_info;
struct vfio_irq_set irq_set;
} data;
};
union muser_cmd_mmap {
struct {
unsigned long addr; /* iova for DMA_MAP, offset for MMAP */
unsigned long len;
unsigned long flags;
} request;
unsigned long response;
};
struct muser_cmd {
enum muser_cmd_type type;
union {
struct muser_cmd_rw rw;
struct muser_cmd_ioctl ioctl;
union muser_cmd_mmap mmap;
};
int err;
};
/* ioctl cmds valid for /dev/muser/<uuid> */
#define MUSER_DEV_CMD_WAIT _IOW('M', 1, struct muser_cmd)
#define MUSER_DEV_CMD_DONE _IOW('M', 2, struct muser_cmd)
#endif /* _UAPI_LINUX_MUSER_H */
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