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 */
 90const 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};
119EXPORT_SYMBOL_NS_GPL(libie_rx_pt_lut, "LIBIE");
120
121MODULE_DESCRIPTION("Intel(R) Ethernet common library");
122MODULE_IMPORT_NS("LIBETH");
123MODULE_LICENSE("GPL");