drivers/net/ethernet/intel/libie/rx.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* Copyright (C) 2024 Intel Corporation */
   3
   4 #include <linux/net/intel/libie/rx.h>
   5
   6 /* O(1) converting i40e/ice/iavf's 8/10-bit hardware packet type to a parsed
   7  * bitfield struct.
   8  */
   9
  10 /* A few supplementary definitions for when XDP hash types do not coincide
  11  * with what can be generated from ptype definitions by means of preprocessor
  12  * concatenation.
  13  */
  14 #define XDP_RSS_L3_L2                   XDP_RSS_TYPE_NONE
  15 #define XDP_RSS_L4_NONE                 XDP_RSS_TYPE_NONE
  16 #define XDP_RSS_L4_TIMESYNC             XDP_RSS_TYPE_NONE
  17 #define XDP_RSS_TYPE_L3                 XDP_RSS_TYPE_NONE
  18 #define XDP_RSS_TYPE_L4                 XDP_RSS_L4
  19
  20 #define LIBIE_RX_PT(oip, ofrag, tun, tp, tefr, iprot, pl) {                \
  21                 .outer_ip               = LIBETH_RX_PT_OUTER_##oip,        \
  22                 .outer_frag             = LIBETH_RX_PT_##ofrag,            \
  23                 .tunnel_type            = LIBETH_RX_PT_TUNNEL_IP_##tun,    \
  24                 .tunnel_end_prot        = LIBETH_RX_PT_TUNNEL_END_##tp,    \
  25                 .tunnel_end_frag        = LIBETH_RX_PT_##tefr,             \
  26                 .inner_prot             = LIBETH_RX_PT_INNER_##iprot,      \
  27                 .payload_layer          = LIBETH_RX_PT_PAYLOAD_##pl,       \
  28                 .hash_type              = XDP_RSS_L3_##oip |               \
  29                                           XDP_RSS_L4_##iprot |             \
  30                                           XDP_RSS_TYPE_##pl,               \
  31         }
  32
  33 #define LIBIE_RX_PT_UNUSED              { }
  34
  35 #define __LIBIE_RX_PT_L2(iprot, pl)                                        \
  36         LIBIE_RX_PT(L2, NOT_FRAG, NONE, NONE, NOT_FRAG, iprot, pl)
  37 #define LIBIE_RX_PT_L2          __LIBIE_RX_PT_L2(NONE, L2)
  38 #define LIBIE_RX_PT_TS          __LIBIE_RX_PT_L2(TIMESYNC, L2)
  39 #define LIBIE_RX_PT_L3          __LIBIE_RX_PT_L2(NONE, L3)
  40
  41 #define LIBIE_RX_PT_IP_FRAG(oip)                                           \
  42         LIBIE_RX_PT(IPV##oip, FRAG, NONE, NONE, NOT_FRAG, NONE, L3)
  43 #define LIBIE_RX_PT_IP_L3(oip, tun, teprot, tefr)                          \
  44         LIBIE_RX_PT(IPV##oip, NOT_FRAG, tun, teprot, tefr, NONE, L3)
  45 #define LIBIE_RX_PT_IP_L4(oip, tun, teprot, iprot)                         \
  46         LIBIE_RX_PT(IPV##oip, NOT_FRAG, tun, teprot, NOT_FRAG, iprot, L4)
  47
  48 #define LIBIE_RX_PT_IP_NOF(oip, tun, ver)                                  \
  49         LIBIE_RX_PT_IP_L3(oip, tun, ver, NOT_FRAG),                        \
  50         LIBIE_RX_PT_IP_L4(oip, tun, ver, UDP),                             \
  51         LIBIE_RX_PT_UNUSED,                                                \
  52         LIBIE_RX_PT_IP_L4(oip, tun, ver, TCP),                             \
  53         LIBIE_RX_PT_IP_L4(oip, tun, ver, SCTP),                            \
  54         LIBIE_RX_PT_IP_L4(oip, tun, ver, ICMP)
  55
  56 /* IPv oip --> tun --> IPv ver */
  57 #define LIBIE_RX_PT_IP_TUN_VER(oip, tun, ver)                              \
  58         LIBIE_RX_PT_IP_L3(oip, tun, ver, FRAG),                            \
  59         LIBIE_RX_PT_IP_NOF(oip, tun, ver)
  60
  61 /* Non Tunneled IPv oip */
  62 #define LIBIE_RX_PT_IP_RAW(oip)                                            \
  63         LIBIE_RX_PT_IP_FRAG(oip),                                          \
  64         LIBIE_RX_PT_IP_NOF(oip, NONE, NONE)
  65
  66 /* IPv oip --> tun --> { IPv4, IPv6 } */
  67 #define LIBIE_RX_PT_IP_TUN(oip, tun)                                       \
  68         LIBIE_RX_PT_IP_TUN_VER(oip, tun, IPV4),                            \
  69         LIBIE_RX_PT_IP_TUN_VER(oip, tun, IPV6)
  70
  71 /* IPv oip --> GRE/NAT tun --> { x, IPv4, IPv6 } */
  72 #define LIBIE_RX_PT_IP_GRE(oip, tun)                                       \
  73         LIBIE_RX_PT_IP_L3(oip, tun, NONE, NOT_FRAG),                       \
  74         LIBIE_RX_PT_IP_TUN(oip, tun)
  75
  76 /* Non Tunneled IPv oip
  77  * IPv oip --> { IPv4, IPv6 }
  78  * IPv oip --> GRE/NAT --> { x, IPv4, IPv6 }
  79  * IPv oip --> GRE/NAT --> MAC --> { x, IPv4, IPv6 }
  80  * IPv oip --> GRE/NAT --> MAC/VLAN --> { x, IPv4, IPv6 }
  81  */
  82 #define LIBIE_RX_PT_IP(oip)                                                \
  83         LIBIE_RX_PT_IP_RAW(oip),                                           \
  84         LIBIE_RX_PT_IP_TUN(oip, IP),                                       \
  85         LIBIE_RX_PT_IP_GRE(oip, GRENAT),                                   \
  86         LIBIE_RX_PT_IP_GRE(oip, GRENAT_MAC),                               \
  87         LIBIE_RX_PT_IP_GRE(oip, GRENAT_MAC_VLAN)
  88
  89 /* Lookup table mapping for O(1) parsing */
  90 const struct libeth_rx_pt libie_rx_pt_lut[LIBIE_RX_PT_NUM] = {
  91         /* L2 packet types */
  92         LIBIE_RX_PT_UNUSED,
  93         LIBIE_RX_PT_L2,
  94         LIBIE_RX_PT_TS,
  95         LIBIE_RX_PT_L2,
  96         LIBIE_RX_PT_UNUSED,
  97         LIBIE_RX_PT_UNUSED,
  98         LIBIE_RX_PT_L2,
  99         LIBIE_RX_PT_L2,
 100         LIBIE_RX_PT_UNUSED,
 101         LIBIE_RX_PT_UNUSED,
 102         LIBIE_RX_PT_L2,
 103         LIBIE_RX_PT_UNUSED,
 104
 105         LIBIE_RX_PT_L3,
 106         LIBIE_RX_PT_L3,
 107         LIBIE_RX_PT_L3,
 108         LIBIE_RX_PT_L3,
 109         LIBIE_RX_PT_L3,
 110         LIBIE_RX_PT_L3,
 111         LIBIE_RX_PT_L3,
 112         LIBIE_RX_PT_L3,
 113         LIBIE_RX_PT_L3,
 114         LIBIE_RX_PT_L3,
 115
 116         LIBIE_RX_PT_IP(4),
 117         LIBIE_RX_PT_IP(6),
 118 };
 119 EXPORT_SYMBOL_NS_GPL(libie_rx_pt_lut, "LIBIE");
 120
 121 MODULE_DESCRIPTION("Intel(R) Ethernet common library");
 122 MODULE_IMPORT_NS("LIBETH");
 123 MODULE_LICENSE("GPL");