1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * if_xdp: XDP socket user-space interface 4 * Copyright(c) 2018 Intel Corporation. 5 * 6 * Author(s): Björn Töpel <bjorn.topel@intel.com> 7 * Magnus Karlsson <magnus.karlsson@intel.com> 8 */ 9 10 #ifndef _LINUX_IF_XDP_H 11 #define _LINUX_IF_XDP_H 12 13 #include <linux/types.h> 14 15 /* Options for the sxdp_flags field */ 16 #define XDP_SHARED_UMEM (1 << 0) 17 #define XDP_COPY (1 << 1) /* Force copy-mode */ 18 #define XDP_ZEROCOPY (1 << 2) /* Force zero-copy mode */ 19 20 struct sockaddr_xdp { 21 __u16 sxdp_family; 22 __u16 sxdp_flags; 23 __u32 sxdp_ifindex; 24 __u32 sxdp_queue_id; 25 __u32 sxdp_shared_umem_fd; 26 }; 27 28 struct xdp_ring_offset { 29 __u64 producer; 30 __u64 consumer; 31 __u64 desc; 32 }; 33 34 struct xdp_mmap_offsets { 35 struct xdp_ring_offset rx; 36 struct xdp_ring_offset tx; 37 struct xdp_ring_offset fr; /* Fill */ 38 struct xdp_ring_offset cr; /* Completion */ 39 }; 40 41 /* XDP socket options */ 42 #define XDP_MMAP_OFFSETS 1 43 #define XDP_RX_RING 2 44 #define XDP_TX_RING 3 45 #define XDP_UMEM_REG 4 46 #define XDP_UMEM_FILL_RING 5 47 #define XDP_UMEM_COMPLETION_RING 6 48 #define XDP_STATISTICS 7 49 50 struct xdp_umem_reg { 51 __u64 addr; /* Start of packet data area */ 52 __u64 len; /* Length of packet data area */ 53 __u32 chunk_size; 54 __u32 headroom; 55 }; 56 57 struct xdp_statistics { 58 __u64 rx_dropped; /* Dropped for reasons other than invalid desc */ 59 __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */ 60 __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */ 61 }; 62 63 /* Pgoff for mmaping the rings */ 64 #define XDP_PGOFF_RX_RING 0 65 #define XDP_PGOFF_TX_RING 0x80000000 66 #define XDP_UMEM_PGOFF_FILL_RING 0x100000000ULL 67 #define XDP_UMEM_PGOFF_COMPLETION_RING 0x180000000ULL 68 69 /* Rx/Tx descriptor */ 70 struct xdp_desc { 71 __u64 addr; 72 __u32 len; 73 __u32 options; 74 }; 75 76 /* UMEM descriptor is __u64 */ 77 78 #endif /* _LINUX_IF_XDP_H */ 79