cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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if_xdp.h (3011B)

      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/* If this option is set, the driver might go sleep and in that case
     20 * the XDP_RING_NEED_WAKEUP flag in the fill and/or Tx rings will be
     21 * set. If it is set, the application need to explicitly wake up the
     22 * driver with a poll() (Rx and Tx) or sendto() (Tx only). If you are
     23 * running the driver and the application on the same core, you should
     24 * use this option so that the kernel will yield to the user space
     25 * application.
     26 */
     27#define XDP_USE_NEED_WAKEUP (1 << 3)
     28
     29/* Flags for xsk_umem_config flags */
     30#define XDP_UMEM_UNALIGNED_CHUNK_FLAG (1 << 0)
     31
     32struct sockaddr_xdp {
     33	__u16 sxdp_family;
     34	__u16 sxdp_flags;
     35	__u32 sxdp_ifindex;
     36	__u32 sxdp_queue_id;
     37	__u32 sxdp_shared_umem_fd;
     38};
     39
     40/* XDP_RING flags */
     41#define XDP_RING_NEED_WAKEUP (1 << 0)
     42
     43struct xdp_ring_offset {
     44	__u64 producer;
     45	__u64 consumer;
     46	__u64 desc;
     47	__u64 flags;
     48};
     49
     50struct xdp_mmap_offsets {
     51	struct xdp_ring_offset rx;
     52	struct xdp_ring_offset tx;
     53	struct xdp_ring_offset fr; /* Fill */
     54	struct xdp_ring_offset cr; /* Completion */
     55};
     56
     57/* XDP socket options */
     58#define XDP_MMAP_OFFSETS		1
     59#define XDP_RX_RING			2
     60#define XDP_TX_RING			3
     61#define XDP_UMEM_REG			4
     62#define XDP_UMEM_FILL_RING		5
     63#define XDP_UMEM_COMPLETION_RING	6
     64#define XDP_STATISTICS			7
     65#define XDP_OPTIONS			8
     66
     67struct xdp_umem_reg {
     68	__u64 addr; /* Start of packet data area */
     69	__u64 len; /* Length of packet data area */
     70	__u32 chunk_size;
     71	__u32 headroom;
     72	__u32 flags;
     73};
     74
     75struct xdp_statistics {
     76	__u64 rx_dropped; /* Dropped for other reasons */
     77	__u64 rx_invalid_descs; /* Dropped due to invalid descriptor */
     78	__u64 tx_invalid_descs; /* Dropped due to invalid descriptor */
     79	__u64 rx_ring_full; /* Dropped due to rx ring being full */
     80	__u64 rx_fill_ring_empty_descs; /* Failed to retrieve item from fill ring */
     81	__u64 tx_ring_empty_descs; /* Failed to retrieve item from tx ring */
     82};
     83
     84struct xdp_options {
     85	__u32 flags;
     86};
     87
     88/* Flags for the flags field of struct xdp_options */
     89#define XDP_OPTIONS_ZEROCOPY (1 << 0)
     90
     91/* Pgoff for mmaping the rings */
     92#define XDP_PGOFF_RX_RING			  0
     93#define XDP_PGOFF_TX_RING		 0x80000000
     94#define XDP_UMEM_PGOFF_FILL_RING	0x100000000ULL
     95#define XDP_UMEM_PGOFF_COMPLETION_RING	0x180000000ULL
     96
     97/* Masks for unaligned chunks mode */
     98#define XSK_UNALIGNED_BUF_OFFSET_SHIFT 48
     99#define XSK_UNALIGNED_BUF_ADDR_MASK \
    100	((1ULL << XSK_UNALIGNED_BUF_OFFSET_SHIFT) - 1)
    101
    102/* Rx/Tx descriptor */
    103struct xdp_desc {
    104	__u64 addr;
    105	__u32 len;
    106	__u32 options;
    107};
    108
    109/* UMEM descriptor is __u64 */
    110
    111#endif /* _LINUX_IF_XDP_H */