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 <[email protected]> 7 * Magnus Karlsson <[email protected]> 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 17 18 struct sockaddr_xdp { 19 __u16 sxdp_family; 20 __u16 sxdp_flags; 21 __u32 sxdp_ifindex; 22 __u32 sxdp_queue_id; 23 __u32 sxdp_shared_umem_fd; 24 }; 25 26 struct xdp_ring_offset { 27 __u64 producer; 28 __u64 consumer; 29 __u64 desc; 30 }; 31 32 struct xdp_mmap_offsets { 33 struct xdp_ring_offset rx; 34 struct xdp_ring_offset tx; 35 struct xdp_ring_offset fr; /* Fill */ 36 struct xdp_ring_offset cr; /* Completion */ 37 }; 38 39 /* XDP socket options */ 40 #define XDP_MMAP_OFFSETS 1 41 #define XDP_RX_RING 2 42 #define XDP_TX_RING 3 43 #define XDP_UMEM_REG 4 44 #define XDP_UMEM_FILL_RING 5 45 #define XDP_UMEM_COMPLETION_RING 6 46 #define XDP_STATISTICS 7 47 48 struct xdp_umem_reg { 49 __u64 addr; /* Start of packet data area */ 50 __u64 len; /* Length of packet data area */ 51 __u32 chunk_size; 52 __u32 headroom; 53 }; 54 55 struct xdp_statistics { 56 __u64 rx_dropped; /* Dropped for reasons other than invalid desc */ 57 __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */ 58 __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */ 59 }; 60 61 /* Pgoff for mmaping the rings */ 62 #define XDP_PGOFF_RX_RING 0 63 #define XDP_PGOFF_TX_RING 0x80000000 64 #define XDP_UMEM_PGOFF_FILL_RING 0x100000000 65 #define XDP_UMEM_PGOFF_COMPLETION_RING 0x180000000 66 67 /* Rx/Tx descriptor */ 68 struct xdp_desc { 69 __u64 addr; 70 __u32 len; 71 __u32 options; 72 }; 73 74 /* UMEM descriptor is __u64 */ 75 76 #endif /* _LINUX_IF_XDP_H */ 77