]> Git Repo - J-linux.git/blob - drivers/net/ethernet/intel/libie/rx.c
Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / 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");
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