rx.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/* Copyright (C) 2024-2025 Intel Corporation */
  3
  4#define DEFAULT_SYMBOL_NAMESPACE	"LIBIE"
  5
  6#include <linux/export.h>
  7#include <linux/net/intel/libie/rx.h>
  8
  9/* O(1) converting i40e/ice/iavf's 8/10-bit hardware packet type to a parsed
 10 * bitfield struct.
 11 */
 12
 13/* A few supplementary definitions for when XDP hash types do not coincide
 14 * with what can be generated from ptype definitions by means of preprocessor
 15 * concatenation.
 16 */
 17#define XDP_RSS_L3_L2			XDP_RSS_TYPE_NONE
 18#define XDP_RSS_L4_NONE			XDP_RSS_TYPE_NONE
 19#define XDP_RSS_L4_TIMESYNC		XDP_RSS_TYPE_NONE
 20#define XDP_RSS_TYPE_L3			XDP_RSS_TYPE_NONE
 21#define XDP_RSS_TYPE_L4			XDP_RSS_L4
 22
 23#define LIBIE_RX_PT(oip, ofrag, tun, tp, tefr, iprot, pl) {		   \
 24		.outer_ip		= LIBETH_RX_PT_OUTER_##oip,	   \
 25		.outer_frag		= LIBETH_RX_PT_##ofrag,		   \
 26		.tunnel_type		= LIBETH_RX_PT_TUNNEL_IP_##tun,	   \
 27		.tunnel_end_prot	= LIBETH_RX_PT_TUNNEL_END_##tp,	   \
 28		.tunnel_end_frag	= LIBETH_RX_PT_##tefr,		   \
 29		.inner_prot		= LIBETH_RX_PT_INNER_##iprot,	   \
 30		.payload_layer		= LIBETH_RX_PT_PAYLOAD_##pl,	   \
 31		.hash_type		= XDP_RSS_L3_##oip |		   \
 32					  XDP_RSS_L4_##iprot |		   \
 33					  XDP_RSS_TYPE_##pl,		   \
 34	}
 35
 36#define LIBIE_RX_PT_UNUSED		{ }
 37
 38#define __LIBIE_RX_PT_L2(iprot, pl)					   \
 39	LIBIE_RX_PT(L2, NOT_FRAG, NONE, NONE, NOT_FRAG, iprot, pl)
 40#define LIBIE_RX_PT_L2		__LIBIE_RX_PT_L2(NONE, L2)
 41#define LIBIE_RX_PT_TS		__LIBIE_RX_PT_L2(TIMESYNC, L2)
 42#define LIBIE_RX_PT_L3		__LIBIE_RX_PT_L2(NONE, L3)
 43
 44#define LIBIE_RX_PT_IP_FRAG(oip)					   \
 45	LIBIE_RX_PT(IPV##oip, FRAG, NONE, NONE, NOT_FRAG, NONE, L3)
 46#define LIBIE_RX_PT_IP_L3(oip, tun, teprot, tefr)			   \
 47	LIBIE_RX_PT(IPV##oip, NOT_FRAG, tun, teprot, tefr, NONE, L3)
 48#define LIBIE_RX_PT_IP_L4(oip, tun, teprot, iprot)			   \
 49	LIBIE_RX_PT(IPV##oip, NOT_FRAG, tun, teprot, NOT_FRAG, iprot, L4)
 50
 51#define LIBIE_RX_PT_IP_NOF(oip, tun, ver)				   \
 52	LIBIE_RX_PT_IP_L3(oip, tun, ver, NOT_FRAG),			   \
 53	LIBIE_RX_PT_IP_L4(oip, tun, ver, UDP),				   \
 54	LIBIE_RX_PT_UNUSED,						   \
 55	LIBIE_RX_PT_IP_L4(oip, tun, ver, TCP),				   \
 56	LIBIE_RX_PT_IP_L4(oip, tun, ver, SCTP),				   \
 57	LIBIE_RX_PT_IP_L4(oip, tun, ver, ICMP)
 58
 59/* IPv oip --> tun --> IPv ver */
 60#define LIBIE_RX_PT_IP_TUN_VER(oip, tun, ver)				   \
 61	LIBIE_RX_PT_IP_L3(oip, tun, ver, FRAG),				   \
 62	LIBIE_RX_PT_IP_NOF(oip, tun, ver)
 63
 64/* Non Tunneled IPv oip */
 65#define LIBIE_RX_PT_IP_RAW(oip)						   \
 66	LIBIE_RX_PT_IP_FRAG(oip),					   \
 67	LIBIE_RX_PT_IP_NOF(oip, NONE, NONE)
 68
 69/* IPv oip --> tun --> { IPv4, IPv6 } */
 70#define LIBIE_RX_PT_IP_TUN(oip, tun)					   \
 71	LIBIE_RX_PT_IP_TUN_VER(oip, tun, IPV4),				   \
 72	LIBIE_RX_PT_IP_TUN_VER(oip, tun, IPV6)
 73
 74/* IPv oip --> GRE/NAT tun --> { x, IPv4, IPv6 } */
 75#define LIBIE_RX_PT_IP_GRE(oip, tun)					   \
 76	LIBIE_RX_PT_IP_L3(oip, tun, NONE, NOT_FRAG),			   \
 77	LIBIE_RX_PT_IP_TUN(oip, tun)
 78
 79/* Non Tunneled IPv oip
 80 * IPv oip --> { IPv4, IPv6 }
 81 * IPv oip --> GRE/NAT --> { x, IPv4, IPv6 }
 82 * IPv oip --> GRE/NAT --> MAC --> { x, IPv4, IPv6 }
 83 * IPv oip --> GRE/NAT --> MAC/VLAN --> { x, IPv4, IPv6 }
 84 */
 85#define LIBIE_RX_PT_IP(oip)						   \
 86	LIBIE_RX_PT_IP_RAW(oip),					   \
 87	LIBIE_RX_PT_IP_TUN(oip, IP),					   \
 88	LIBIE_RX_PT_IP_GRE(oip, GRENAT),				   \
 89	LIBIE_RX_PT_IP_GRE(oip, GRENAT_MAC),				   \
 90	LIBIE_RX_PT_IP_GRE(oip, GRENAT_MAC_VLAN)
 91
 92/* Lookup table mapping for O(1) parsing */
 93const struct libeth_rx_pt libie_rx_pt_lut[LIBIE_RX_PT_NUM] = {
 94	/* L2 packet types */
 95	LIBIE_RX_PT_UNUSED,
 96	LIBIE_RX_PT_L2,
 97	LIBIE_RX_PT_TS,
 98	LIBIE_RX_PT_L2,
 99	LIBIE_RX_PT_UNUSED,
100	LIBIE_RX_PT_UNUSED,
101	LIBIE_RX_PT_L2,
102	LIBIE_RX_PT_L2,
103	LIBIE_RX_PT_UNUSED,
104	LIBIE_RX_PT_UNUSED,
105	LIBIE_RX_PT_L2,
106	LIBIE_RX_PT_UNUSED,
107
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	LIBIE_RX_PT_L3,
116	LIBIE_RX_PT_L3,
117	LIBIE_RX_PT_L3,
118
119	LIBIE_RX_PT_IP(4),
120	LIBIE_RX_PT_IP(6),
121};
122EXPORT_SYMBOL_GPL(libie_rx_pt_lut);
123
124MODULE_DESCRIPTION("Intel(R) Ethernet common library");
125MODULE_IMPORT_NS("LIBETH");
126MODULE_LICENSE("GPL");