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111 lines
2.9 KiB
111 lines
2.9 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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/* |
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* if_xdp: XDP socket user-space interface |
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* Copyright(c) 2018 Intel Corporation. |
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* |
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* Author(s): Björn Töpel <[email protected]> |
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* Magnus Karlsson <[email protected]> |
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*/ |
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#ifndef _LINUX_IF_XDP_H |
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#define _LINUX_IF_XDP_H |
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#include <linux/types.h> |
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/* Options for the sxdp_flags field */ |
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#define XDP_SHARED_UMEM (1 << 0) |
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#define XDP_COPY (1 << 1) /* Force copy-mode */ |
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#define XDP_ZEROCOPY (1 << 2) /* Force zero-copy mode */ |
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/* If this option is set, the driver might go sleep and in that case |
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* the XDP_RING_NEED_WAKEUP flag in the fill and/or Tx rings will be |
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* set. If it is set, the application need to explicitly wake up the |
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* driver with a poll() (Rx and Tx) or sendto() (Tx only). If you are |
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* running the driver and the application on the same core, you should |
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* use this option so that the kernel will yield to the user space |
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* application. |
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*/ |
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#define XDP_USE_NEED_WAKEUP (1 << 3) |
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/* Flags for xsk_umem_config flags */ |
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#define XDP_UMEM_UNALIGNED_CHUNK_FLAG (1 << 0) |
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struct sockaddr_xdp { |
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__u16 sxdp_family; |
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__u16 sxdp_flags; |
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__u32 sxdp_ifindex; |
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__u32 sxdp_queue_id; |
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__u32 sxdp_shared_umem_fd; |
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}; |
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/* XDP_RING flags */ |
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#define XDP_RING_NEED_WAKEUP (1 << 0) |
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struct xdp_ring_offset { |
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__u64 producer; |
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__u64 consumer; |
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__u64 desc; |
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__u64 flags; |
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}; |
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struct xdp_mmap_offsets { |
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struct xdp_ring_offset rx; |
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struct xdp_ring_offset tx; |
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struct xdp_ring_offset fr; /* Fill */ |
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struct xdp_ring_offset cr; /* Completion */ |
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}; |
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/* XDP socket options */ |
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#define XDP_MMAP_OFFSETS 1 |
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#define XDP_RX_RING 2 |
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#define XDP_TX_RING 3 |
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#define XDP_UMEM_REG 4 |
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#define XDP_UMEM_FILL_RING 5 |
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#define XDP_UMEM_COMPLETION_RING 6 |
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#define XDP_STATISTICS 7 |
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#define XDP_OPTIONS 8 |
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struct xdp_umem_reg { |
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__u64 addr; /* Start of packet data area */ |
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__u64 len; /* Length of packet data area */ |
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__u32 chunk_size; |
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__u32 headroom; |
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__u32 flags; |
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}; |
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struct xdp_statistics { |
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__u64 rx_dropped; /* Dropped for other reasons */ |
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__u64 rx_invalid_descs; /* Dropped due to invalid descriptor */ |
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__u64 tx_invalid_descs; /* Dropped due to invalid descriptor */ |
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__u64 rx_ring_full; /* Dropped due to rx ring being full */ |
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__u64 rx_fill_ring_empty_descs; /* Failed to retrieve item from fill ring */ |
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__u64 tx_ring_empty_descs; /* Failed to retrieve item from tx ring */ |
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}; |
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struct xdp_options { |
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__u32 flags; |
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}; |
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/* Flags for the flags field of struct xdp_options */ |
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#define XDP_OPTIONS_ZEROCOPY (1 << 0) |
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/* Pgoff for mmaping the rings */ |
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#define XDP_PGOFF_RX_RING 0 |
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#define XDP_PGOFF_TX_RING 0x80000000 |
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#define XDP_UMEM_PGOFF_FILL_RING 0x100000000ULL |
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#define XDP_UMEM_PGOFF_COMPLETION_RING 0x180000000ULL |
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/* Masks for unaligned chunks mode */ |
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#define XSK_UNALIGNED_BUF_OFFSET_SHIFT 48 |
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#define XSK_UNALIGNED_BUF_ADDR_MASK \ |
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((1ULL << XSK_UNALIGNED_BUF_OFFSET_SHIFT) - 1) |
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/* Rx/Tx descriptor */ |
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struct xdp_desc { |
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__u64 addr; |
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__u32 len; |
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__u32 options; |
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}; |
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/* UMEM descriptor is __u64 */ |
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#endif /* _LINUX_IF_XDP_H */
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