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 24c0c77d8fSBjörn Töpel /* XDP socket options */ 25*b9b6b68eSBjörn Töpel #define XDP_RX_RING 1 26c0c77d8fSBjörn Töpel #define XDP_UMEM_REG 3 27423f3832SMagnus Karlsson #define XDP_UMEM_FILL_RING 4 28c0c77d8fSBjörn Töpel 29c0c77d8fSBjörn Töpel struct xdp_umem_reg { 30c0c77d8fSBjörn Töpel __u64 addr; /* Start of packet data area */ 31c0c77d8fSBjörn Töpel __u64 len; /* Length of packet data area */ 32c0c77d8fSBjörn Töpel __u32 frame_size; /* Frame size */ 33c0c77d8fSBjörn Töpel __u32 frame_headroom; /* Frame head room */ 34c0c77d8fSBjörn Töpel }; 35c0c77d8fSBjörn Töpel 36423f3832SMagnus Karlsson /* Pgoff for mmaping the rings */ 37*b9b6b68eSBjörn Töpel #define XDP_PGOFF_RX_RING 0 38423f3832SMagnus Karlsson #define XDP_UMEM_PGOFF_FILL_RING 0x100000000 39423f3832SMagnus Karlsson 40*b9b6b68eSBjörn Töpel struct xdp_desc { 41*b9b6b68eSBjörn Töpel __u32 idx; 42*b9b6b68eSBjörn Töpel __u32 len; 43*b9b6b68eSBjörn Töpel __u16 offset; 44*b9b6b68eSBjörn Töpel __u8 flags; 45*b9b6b68eSBjörn Töpel __u8 padding[5]; 46*b9b6b68eSBjörn Töpel }; 47*b9b6b68eSBjörn Töpel 48423f3832SMagnus Karlsson struct xdp_ring { 49423f3832SMagnus Karlsson __u32 producer __attribute__((aligned(64))); 50423f3832SMagnus Karlsson __u32 consumer __attribute__((aligned(64))); 51423f3832SMagnus Karlsson }; 52423f3832SMagnus Karlsson 53*b9b6b68eSBjörn Töpel /* Used for the RX and TX queues for packets */ 54*b9b6b68eSBjörn Töpel struct xdp_rxtx_ring { 55*b9b6b68eSBjörn Töpel struct xdp_ring ptrs; 56*b9b6b68eSBjörn Töpel struct xdp_desc desc[0] __attribute__((aligned(64))); 57*b9b6b68eSBjörn Töpel }; 58*b9b6b68eSBjörn Töpel 59423f3832SMagnus Karlsson /* Used for the fill and completion queues for buffers */ 60423f3832SMagnus Karlsson struct xdp_umem_ring { 61423f3832SMagnus Karlsson struct xdp_ring ptrs; 62423f3832SMagnus Karlsson __u32 desc[0] __attribute__((aligned(64))); 63423f3832SMagnus Karlsson }; 64423f3832SMagnus Karlsson 65c0c77d8fSBjörn Töpel #endif /* _LINUX_IF_XDP_H */ 66