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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#ifndef EAL_VFIO_H_
#define EAL_VFIO_H_
/*
* 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
#else
#pragma message("VFIO configured but not supported by this kernel, disabling.")
#endif /* kernel version >= 3.6.0 */
#endif /* RTE_EAL_VFIO */
#ifdef VFIO_PRESENT
#include <linux/vfio.h>
#define RTE_VFIO_TYPE1 VFIO_TYPE1_IOMMU
#ifndef VFIO_SPAPR_TCE_v2_IOMMU
#define RTE_VFIO_SPAPR 7
#define VFIO_IOMMU_SPAPR_REGISTER_MEMORY _IO(VFIO_TYPE, VFIO_BASE + 17)
#define VFIO_IOMMU_SPAPR_TCE_CREATE _IO(VFIO_TYPE, VFIO_BASE + 19)
#define VFIO_IOMMU_SPAPR_TCE_REMOVE _IO(VFIO_TYPE, VFIO_BASE + 20)
struct vfio_iommu_spapr_register_memory {
uint32_t argsz;
uint32_t flags;
uint64_t vaddr;
uint64_t size;
};
struct vfio_iommu_spapr_tce_create {
uint32_t argsz;
uint32_t flags;
/* in */
uint32_t page_shift;
uint32_t __resv1;
uint64_t window_size;
uint32_t levels;
uint32_t __resv2;
/* out */
uint64_t start_addr;
};
struct vfio_iommu_spapr_tce_remove {
uint32_t argsz;
uint32_t flags;
/* in */
uint64_t start_addr;
};
struct vfio_iommu_spapr_tce_ddw_info {
uint64_t pgsizes;
uint32_t max_dynamic_windows_supported;
uint32_t levels;
};
/* SPAPR_v2 is not present, but SPAPR might be */
#ifndef VFIO_SPAPR_TCE_IOMMU
#define VFIO_IOMMU_SPAPR_TCE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
struct vfio_iommu_spapr_tce_info {
uint32_t argsz;
uint32_t flags;
uint32_t dma32_window_start;
uint32_t dma32_window_size;
struct vfio_iommu_spapr_tce_ddw_info ddw;
};
#endif /* VFIO_SPAPR_TCE_IOMMU */
#else /* VFIO_SPAPR_TCE_v2_IOMMU */
#define RTE_VFIO_SPAPR VFIO_SPAPR_TCE_v2_IOMMU
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
#define RTE_VFIO_NOIOMMU 8
#else
#define RTE_VFIO_NOIOMMU VFIO_NOIOMMU_IOMMU
#endif
#define VFIO_MAX_GROUPS RTE_MAX_VFIO_GROUPS
/*
* Function prototypes for VFIO multiprocess sync functions
*/
int vfio_mp_sync_send_request(int socket, int req);
int vfio_mp_sync_receive_request(int socket);
int vfio_mp_sync_send_fd(int socket, int fd);
int vfio_mp_sync_receive_fd(int socket);
int vfio_mp_sync_connect_to_primary(void);
/*
* we don't need to store device fd's anywhere since they can be obtained from
* the group fd via an ioctl() call.
*/
struct vfio_group {
int group_no;
int fd;
int devices;
};
struct vfio_config {
int vfio_enabled;
int vfio_container_fd;
int vfio_active_groups;
struct vfio_group vfio_groups[VFIO_MAX_GROUPS];
};
/* DMA mapping function prototype.
* Takes VFIO container fd as a parameter.
* Returns 0 on success, -1 on error.
* */
typedef int (*vfio_dma_func_t)(int);
struct vfio_iommu_type {
int type_id;
const char *name;
vfio_dma_func_t dma_map_func;
};
/* pick IOMMU type. returns a pointer to vfio_iommu_type or NULL for error */
const struct vfio_iommu_type *
vfio_set_iommu_type(int vfio_container_fd);
/* check if we have any supported extensions */
int
vfio_has_supported_extensions(int vfio_container_fd);
/* open container fd or get an existing one */
int
vfio_get_container_fd(void);
/* parse IOMMU group number for a device
* returns 1 on success, -1 for errors, 0 for non-existent group
*/
int
vfio_get_group_no(const char *sysfs_base,
const char *dev_addr, int *iommu_group_no);
/* open group fd or get an existing one */
int
vfio_get_group_fd(int iommu_group_no);
int vfio_mp_sync_setup(void);
#define SOCKET_REQ_CONTAINER 0x100
#define SOCKET_REQ_GROUP 0x200
#define SOCKET_CLR_GROUP 0x300
#define SOCKET_OK 0x0
#define SOCKET_NO_FD 0x1
#define SOCKET_ERR 0xFF
#endif /* VFIO_PRESENT */
#endif /* EAL_VFIO_H_ */
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