1dac09149SBjörn Töpel /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2dac09149SBjörn 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; 20ad75646cSBjörn Töpel __u16 sxdp_flags; 21965a9909SMagnus Karlsson __u32 sxdp_ifindex; 22965a9909SMagnus Karlsson __u32 sxdp_queue_id; 23965a9909SMagnus Karlsson __u32 sxdp_shared_umem_fd; 24965a9909SMagnus Karlsson }; 25965a9909SMagnus Karlsson 26b3a9e0beSBjörn Töpel struct xdp_ring_offset { 27b3a9e0beSBjörn Töpel __u64 producer; 28b3a9e0beSBjörn Töpel __u64 consumer; 29b3a9e0beSBjörn Töpel __u64 desc; 30b3a9e0beSBjörn Töpel }; 31b3a9e0beSBjörn Töpel 32b3a9e0beSBjörn Töpel struct xdp_mmap_offsets { 33b3a9e0beSBjörn Töpel struct xdp_ring_offset rx; 34b3a9e0beSBjörn Töpel struct xdp_ring_offset tx; 35b3a9e0beSBjörn Töpel struct xdp_ring_offset fr; /* Fill */ 36b3a9e0beSBjörn Töpel struct xdp_ring_offset cr; /* Completion */ 37b3a9e0beSBjörn Töpel }; 38b3a9e0beSBjörn Töpel 39c0c77d8fSBjörn Töpel /* XDP socket options */ 40b3a9e0beSBjörn Töpel #define XDP_MMAP_OFFSETS 1 41b3a9e0beSBjörn Töpel #define XDP_RX_RING 2 42b3a9e0beSBjörn Töpel #define XDP_TX_RING 3 43b3a9e0beSBjörn Töpel #define XDP_UMEM_REG 4 44b3a9e0beSBjörn Töpel #define XDP_UMEM_FILL_RING 5 45b3a9e0beSBjörn Töpel #define XDP_UMEM_COMPLETION_RING 6 46b3a9e0beSBjörn Töpel #define XDP_STATISTICS 7 47c0c77d8fSBjörn Töpel 48c0c77d8fSBjörn Töpel struct xdp_umem_reg { 49c0c77d8fSBjörn Töpel __u64 addr; /* Start of packet data area */ 50c0c77d8fSBjörn Töpel __u64 len; /* Length of packet data area */ 51*bbff2f32SBjörn Töpel __u32 chunk_size; 52*bbff2f32SBjörn Töpel __u32 headroom; 53c0c77d8fSBjörn Töpel }; 54c0c77d8fSBjörn Töpel 55af75d9e0SMagnus Karlsson struct xdp_statistics { 56af75d9e0SMagnus Karlsson __u64 rx_dropped; /* Dropped for reasons other than invalid desc */ 57af75d9e0SMagnus Karlsson __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */ 58af75d9e0SMagnus Karlsson __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */ 59af75d9e0SMagnus Karlsson }; 60af75d9e0SMagnus Karlsson 61423f3832SMagnus Karlsson /* Pgoff for mmaping the rings */ 62b9b6b68eSBjörn Töpel #define XDP_PGOFF_RX_RING 0 63f6145903SMagnus Karlsson #define XDP_PGOFF_TX_RING 0x80000000 64423f3832SMagnus Karlsson #define XDP_UMEM_PGOFF_FILL_RING 0x100000000 65fe230832SMagnus Karlsson #define XDP_UMEM_PGOFF_COMPLETION_RING 0x180000000 66423f3832SMagnus Karlsson 67b3a9e0beSBjörn Töpel /* Rx/Tx descriptor */ 68b9b6b68eSBjörn Töpel struct xdp_desc { 69*bbff2f32SBjörn Töpel __u64 addr; 70b9b6b68eSBjörn Töpel __u32 len; 71*bbff2f32SBjörn Töpel __u32 options; 72b9b6b68eSBjörn Töpel }; 73b9b6b68eSBjörn Töpel 74*bbff2f32SBjörn Töpel /* UMEM descriptor is __u64 */ 75423f3832SMagnus Karlsson 76c0c77d8fSBjörn Töpel #endif /* _LINUX_IF_XDP_H */ 77