rte_vfio.h

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2017 6WIND S.A.
 */

#ifndef _RTE_VFIO_H_
#define _RTE_VFIO_H_

#ifdef __cplusplus
extern "C" {
#endif

/*
 * determine if VFIO is present on the system
 */
#if !defined(VFIO_PRESENT) && defined(RTE_EAL_VFIO)
#include <linux/version.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
#define VFIO_PRESENT
#endif /* kernel version >= 3.6.0 */
#endif /* RTE_EAL_VFIO */

#ifdef VFIO_PRESENT

#include <linux/vfio.h>

#define VFIO_DIR "/dev/vfio"
#define VFIO_CONTAINER_PATH "/dev/vfio/vfio"
#define VFIO_GROUP_FMT "/dev/vfio/%u"
#define VFIO_NOIOMMU_GROUP_FMT "/dev/vfio/noiommu-%u"
#define VFIO_GET_REGION_ADDR(x) ((uint64_t) x << 40ULL)
#define VFIO_GET_REGION_IDX(x) (x >> 40)
#define VFIO_NOIOMMU_MODE      \
        "/sys/module/vfio/parameters/enable_unsafe_noiommu_mode"

#else /* not VFIO_PRESENT */

/* we don't need an actual definition, only pointer is used */
struct vfio_device_info;

#endif /* VFIO_PRESENT */

int rte_vfio_setup_device(const char *sysfs_base, const char *dev_addr,
                int *vfio_dev_fd, struct vfio_device_info *device_info);

int rte_vfio_release_device(const char *sysfs_base, const char *dev_addr, int fd);

int rte_vfio_enable(const char *modname);

int rte_vfio_is_enabled(const char *modname);

int rte_vfio_noiommu_is_enabled(void);

/* remove group fd from internal VFIO group fd array */
int
rte_vfio_clear_group(int vfio_group_fd);

#ifdef __cplusplus
}
#endif

#endif /* _RTE_VFIO_H_ */