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m_I|+ & /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* if_xdp: XDP socket user-space interface
* Copyright(c) 2018 Intel Corporation.
*
* Author(s): Björn Töpel
* Magnus Karlsson
*/
#ifndef _LINUX_IF_XDP_H
#define _LINUX_IF_XDP_H
#include
/* Options for the sxdp_flags field */
#define XDP_SHARED_UMEM (1 << 0)
#define XDP_COPY (1 << 1) /* Force copy-mode */
#define XDP_ZEROCOPY (1 << 2) /* Force zero-copy mode */
/* If this option is set, the driver might go sleep and in that case
* the XDP_RING_NEED_WAKEUP flag in the fill and/or Tx rings will be
* set. If it is set, the application need to explicitly wake up the
* driver with a poll() (Rx and Tx) or sendto() (Tx only). If you are
* running the driver and the application on the same core, you should
* use this option so that the kernel will yield to the user space
* application.
*/
#define XDP_USE_NEED_WAKEUP (1 << 3)
/* By setting this option, userspace application indicates that it can
* handle multiple descriptors per packet thus enabling AF_XDP to split
* multi-buffer XDP frames into multiple Rx descriptors. Without this set
* such frames will be dropped.
*/
#define XDP_USE_SG (1 << 4)
/* Flags for xsk_umem_config flags */
#define XDP_UMEM_UNALIGNED_CHUNK_FLAG (1 << 0)
/* Force checksum calculation in software. Can be used for testing or
* working around potential HW issues. This option causes performance
* degradation and only works in XDP_COPY mode.
*/
#define XDP_UMEM_TX_SW_CSUM (1 << 1)
/* Request to reserve tx_metadata_len bytes of per-chunk metadata.
*/
#define XDP_UMEM_TX_METADATA_LEN (1 << 2)
struct sockaddr_xdp {
__u16 sxdp_family;
__u16 sxdp_flags;
__u32 sxdp_ifindex;
__u32 sxdp_queue_id;
__u32 sxdp_shared_umem_fd;
};
/* XDP_RING flags */
#define XDP_RING_NEED_WAKEUP (1 << 0)
struct xdp_ring_offset {
__u64 producer;
__u64 consumer;
__u64 desc;
__u64 flags;
};
struct xdp_mmap_offsets {
struct xdp_ring_offset rx;
struct xdp_ring_offset tx;
struct xdp_ring_offset fr; /* Fill */
struct xdp_ring_offset cr; /* Completion */
};
/* XDP socket options */
#define XDP_MMAP_OFFSETS 1
#define XDP_RX_RING 2
#define XDP_TX_RING 3
#define XDP_UMEM_REG 4
#define XDP_UMEM_FILL_RING 5
#define XDP_UMEM_COMPLETION_RING 6
#define XDP_STATISTICS 7
#define XDP_OPTIONS 8
struct xdp_umem_reg {
__u64 addr; /* Start of packet data area */
__u64 len; /* Length of pac