1c0c77d8fSBjörn Töpel /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note 2c0c77d8fSBjörn Töpel * 3c0c77d8fSBjörn Töpel * if_xdp: XDP socket user-space interface 4c0c77d8fSBjörn Töpel * Copyright(c) 2018 Intel Corporation. 5c0c77d8fSBjörn Töpel * 6c0c77d8fSBjörn Töpel * This program is free software; you can redistribute it and/or modify it 7c0c77d8fSBjörn Töpel * under the terms and conditions of the GNU General Public License, 8c0c77d8fSBjörn Töpel * version 2, as published by the Free Software Foundation. 9c0c77d8fSBjörn Töpel * 10c0c77d8fSBjörn Töpel * This program is distributed in the hope it will be useful, but WITHOUT 11c0c77d8fSBjörn Töpel * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12c0c77d8fSBjörn Töpel * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13c0c77d8fSBjörn Töpel * more details. 14c0c77d8fSBjörn Töpel * 15c0c77d8fSBjörn Töpel * Author(s): Björn Töpel <[email protected]> 16c0c77d8fSBjörn Töpel * Magnus Karlsson <[email protected]> 17c0c77d8fSBjörn Töpel */ 18c0c77d8fSBjörn Töpel 19c0c77d8fSBjörn Töpel #ifndef _LINUX_IF_XDP_H 20c0c77d8fSBjörn Töpel #define _LINUX_IF_XDP_H 21c0c77d8fSBjörn Töpel 22c0c77d8fSBjörn Töpel #include <linux/types.h> 23c0c77d8fSBjörn Töpel 24965a9909SMagnus Karlsson /* Options for the sxdp_flags field */ 25965a9909SMagnus Karlsson #define XDP_SHARED_UMEM 1 26965a9909SMagnus Karlsson 27965a9909SMagnus Karlsson struct sockaddr_xdp { 28965a9909SMagnus Karlsson __u16 sxdp_family; 29965a9909SMagnus Karlsson __u32 sxdp_ifindex; 30965a9909SMagnus Karlsson __u32 sxdp_queue_id; 31965a9909SMagnus Karlsson __u32 sxdp_shared_umem_fd; 32965a9909SMagnus Karlsson __u16 sxdp_flags; 33965a9909SMagnus Karlsson }; 34965a9909SMagnus Karlsson 35c0c77d8fSBjörn Töpel /* XDP socket options */ 36b9b6b68eSBjörn Töpel #define XDP_RX_RING 1 37f6145903SMagnus Karlsson #define XDP_TX_RING 2 38c0c77d8fSBjörn Töpel #define XDP_UMEM_REG 3 39423f3832SMagnus Karlsson #define XDP_UMEM_FILL_RING 4 40fe230832SMagnus Karlsson #define XDP_UMEM_COMPLETION_RING 5 41*af75d9e0SMagnus Karlsson #define XDP_STATISTICS 6 42c0c77d8fSBjörn Töpel 43c0c77d8fSBjörn Töpel struct xdp_umem_reg { 44c0c77d8fSBjörn Töpel __u64 addr; /* Start of packet data area */ 45c0c77d8fSBjörn Töpel __u64 len; /* Length of packet data area */ 46c0c77d8fSBjörn Töpel __u32 frame_size; /* Frame size */ 47c0c77d8fSBjörn Töpel __u32 frame_headroom; /* Frame head room */ 48c0c77d8fSBjörn Töpel }; 49c0c77d8fSBjörn Töpel 50*af75d9e0SMagnus Karlsson struct xdp_statistics { 51*af75d9e0SMagnus Karlsson __u64 rx_dropped; /* Dropped for reasons other than invalid desc */ 52*af75d9e0SMagnus Karlsson __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */ 53*af75d9e0SMagnus Karlsson __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */ 54*af75d9e0SMagnus Karlsson }; 55*af75d9e0SMagnus Karlsson 56423f3832SMagnus Karlsson /* Pgoff for mmaping the rings */ 57b9b6b68eSBjörn Töpel #define XDP_PGOFF_RX_RING 0 58f6145903SMagnus Karlsson #define XDP_PGOFF_TX_RING 0x80000000 59423f3832SMagnus Karlsson #define XDP_UMEM_PGOFF_FILL_RING 0x100000000 60fe230832SMagnus Karlsson #define XDP_UMEM_PGOFF_COMPLETION_RING 0x180000000 61423f3832SMagnus Karlsson 62b9b6b68eSBjörn Töpel struct xdp_desc { 63b9b6b68eSBjörn Töpel __u32 idx; 64b9b6b68eSBjörn Töpel __u32 len; 65b9b6b68eSBjörn Töpel __u16 offset; 66b9b6b68eSBjörn Töpel __u8 flags; 67b9b6b68eSBjörn Töpel __u8 padding[5]; 68b9b6b68eSBjörn Töpel }; 69b9b6b68eSBjörn Töpel 70423f3832SMagnus Karlsson struct xdp_ring { 71423f3832SMagnus Karlsson __u32 producer __attribute__((aligned(64))); 72423f3832SMagnus Karlsson __u32 consumer __attribute__((aligned(64))); 73423f3832SMagnus Karlsson }; 74423f3832SMagnus Karlsson 75b9b6b68eSBjörn Töpel /* Used for the RX and TX queues for packets */ 76b9b6b68eSBjörn Töpel struct xdp_rxtx_ring { 77b9b6b68eSBjörn Töpel struct xdp_ring ptrs; 78b9b6b68eSBjörn Töpel struct xdp_desc desc[0] __attribute__((aligned(64))); 79b9b6b68eSBjörn Töpel }; 80b9b6b68eSBjörn Töpel 81423f3832SMagnus Karlsson /* Used for the fill and completion queues for buffers */ 82423f3832SMagnus Karlsson struct xdp_umem_ring { 83423f3832SMagnus Karlsson struct xdp_ring ptrs; 84423f3832SMagnus Karlsson __u32 desc[0] __attribute__((aligned(64))); 85423f3832SMagnus Karlsson }; 86423f3832SMagnus Karlsson 87c0c77d8fSBjörn Töpel #endif /* _LINUX_IF_XDP_H */ 88