1*dac09149SBjörn Töpel /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*dac09149SBjörn Töpel /* 3c0c77d8fSBjörn Töpel * if_xdp: XDP socket user-space interface 4c0c77d8fSBjörn Töpel * Copyright(c) 2018 Intel Corporation. 5c0c77d8fSBjörn Töpel * 6c0c77d8fSBjörn Töpel * Author(s): Björn Töpel <[email protected]> 7c0c77d8fSBjörn Töpel * Magnus Karlsson <[email protected]> 8c0c77d8fSBjörn Töpel */ 9c0c77d8fSBjörn Töpel 10c0c77d8fSBjörn Töpel #ifndef _LINUX_IF_XDP_H 11c0c77d8fSBjörn Töpel #define _LINUX_IF_XDP_H 12c0c77d8fSBjörn Töpel 13c0c77d8fSBjörn Töpel #include <linux/types.h> 14c0c77d8fSBjörn Töpel 15965a9909SMagnus Karlsson /* Options for the sxdp_flags field */ 16965a9909SMagnus Karlsson #define XDP_SHARED_UMEM 1 17965a9909SMagnus Karlsson 18965a9909SMagnus Karlsson struct sockaddr_xdp { 19965a9909SMagnus Karlsson __u16 sxdp_family; 20965a9909SMagnus Karlsson __u32 sxdp_ifindex; 21965a9909SMagnus Karlsson __u32 sxdp_queue_id; 22965a9909SMagnus Karlsson __u32 sxdp_shared_umem_fd; 23965a9909SMagnus Karlsson __u16 sxdp_flags; 24965a9909SMagnus Karlsson }; 25965a9909SMagnus Karlsson 26c0c77d8fSBjörn Töpel /* XDP socket options */ 27b9b6b68eSBjörn Töpel #define XDP_RX_RING 1 28f6145903SMagnus Karlsson #define XDP_TX_RING 2 29c0c77d8fSBjörn Töpel #define XDP_UMEM_REG 3 30423f3832SMagnus Karlsson #define XDP_UMEM_FILL_RING 4 31fe230832SMagnus Karlsson #define XDP_UMEM_COMPLETION_RING 5 32af75d9e0SMagnus Karlsson #define XDP_STATISTICS 6 33c0c77d8fSBjörn Töpel 34c0c77d8fSBjörn Töpel struct xdp_umem_reg { 35c0c77d8fSBjörn Töpel __u64 addr; /* Start of packet data area */ 36c0c77d8fSBjörn Töpel __u64 len; /* Length of packet data area */ 37c0c77d8fSBjörn Töpel __u32 frame_size; /* Frame size */ 38c0c77d8fSBjörn Töpel __u32 frame_headroom; /* Frame head room */ 39c0c77d8fSBjörn Töpel }; 40c0c77d8fSBjörn Töpel 41af75d9e0SMagnus Karlsson struct xdp_statistics { 42af75d9e0SMagnus Karlsson __u64 rx_dropped; /* Dropped for reasons other than invalid desc */ 43af75d9e0SMagnus Karlsson __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */ 44af75d9e0SMagnus Karlsson __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */ 45af75d9e0SMagnus Karlsson }; 46af75d9e0SMagnus Karlsson 47423f3832SMagnus Karlsson /* Pgoff for mmaping the rings */ 48b9b6b68eSBjörn Töpel #define XDP_PGOFF_RX_RING 0 49f6145903SMagnus Karlsson #define XDP_PGOFF_TX_RING 0x80000000 50423f3832SMagnus Karlsson #define XDP_UMEM_PGOFF_FILL_RING 0x100000000 51fe230832SMagnus Karlsson #define XDP_UMEM_PGOFF_COMPLETION_RING 0x180000000 52423f3832SMagnus Karlsson 53b9b6b68eSBjörn Töpel struct xdp_desc { 54b9b6b68eSBjörn Töpel __u32 idx; 55b9b6b68eSBjörn Töpel __u32 len; 56b9b6b68eSBjörn Töpel __u16 offset; 57b9b6b68eSBjörn Töpel __u8 flags; 58b9b6b68eSBjörn Töpel __u8 padding[5]; 59b9b6b68eSBjörn Töpel }; 60b9b6b68eSBjörn Töpel 61423f3832SMagnus Karlsson struct xdp_ring { 62423f3832SMagnus Karlsson __u32 producer __attribute__((aligned(64))); 63423f3832SMagnus Karlsson __u32 consumer __attribute__((aligned(64))); 64423f3832SMagnus Karlsson }; 65423f3832SMagnus Karlsson 66b9b6b68eSBjörn Töpel /* Used for the RX and TX queues for packets */ 67b9b6b68eSBjörn Töpel struct xdp_rxtx_ring { 68b9b6b68eSBjörn Töpel struct xdp_ring ptrs; 69b9b6b68eSBjörn Töpel struct xdp_desc desc[0] __attribute__((aligned(64))); 70b9b6b68eSBjörn Töpel }; 71b9b6b68eSBjörn Töpel 72423f3832SMagnus Karlsson /* Used for the fill and completion queues for buffers */ 73423f3832SMagnus Karlsson struct xdp_umem_ring { 74423f3832SMagnus Karlsson struct xdp_ring ptrs; 75423f3832SMagnus Karlsson __u32 desc[0] __attribute__((aligned(64))); 76423f3832SMagnus Karlsson }; 77423f3832SMagnus Karlsson 78c0c77d8fSBjörn Töpel #endif /* _LINUX_IF_XDP_H */ 79