1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Network device features.
4 */
5#ifndef _LINUX_NETDEV_FEATURES_H
6#define _LINUX_NETDEV_FEATURES_H
7
8#include <linux/types.h>
9#include <linux/bitops.h>
10#include <asm/byteorder.h>
11
12typedef u64 netdev_features_t;
13
14enum {
15 NETIF_F_SG_BIT, /* Scatter/gather IO. */
16 NETIF_F_IP_CSUM_BIT, /* Can checksum TCP/UDP over IPv4. */
17 __UNUSED_NETIF_F_1,
18 NETIF_F_HW_CSUM_BIT, /* Can checksum all the packets. */
19 NETIF_F_IPV6_CSUM_BIT, /* Can checksum TCP/UDP over IPV6 */
20 NETIF_F_HIGHDMA_BIT, /* Can DMA to high memory. */
21 NETIF_F_FRAGLIST_BIT, /* Scatter/gather IO. */
22 NETIF_F_HW_VLAN_CTAG_TX_BIT, /* Transmit VLAN CTAG HW acceleration */
23 NETIF_F_HW_VLAN_CTAG_RX_BIT, /* Receive VLAN CTAG HW acceleration */
24 NETIF_F_HW_VLAN_CTAG_FILTER_BIT,/* Receive filtering on VLAN CTAGs */
25 NETIF_F_VLAN_CHALLENGED_BIT, /* Device cannot handle VLAN packets */
26 NETIF_F_GSO_BIT, /* Enable software GSO. */
27 NETIF_F_LLTX_BIT, /* LockLess TX - deprecated. Please */
28 /* do not use LLTX in new drivers */
29 NETIF_F_NETNS_LOCAL_BIT, /* Does not change network namespaces */
30 NETIF_F_GRO_BIT, /* Generic receive offload */
31 NETIF_F_LRO_BIT, /* large receive offload */
32
33 /**/NETIF_F_GSO_SHIFT, /* keep the order of SKB_GSO_* bits */
34 NETIF_F_TSO_BIT /* ... TCPv4 segmentation */
35 = NETIF_F_GSO_SHIFT,
36 NETIF_F_GSO_ROBUST_BIT, /* ... ->SKB_GSO_DODGY */
37 NETIF_F_TSO_ECN_BIT, /* ... TCP ECN support */
38 NETIF_F_TSO_MANGLEID_BIT, /* ... IPV4 ID mangling allowed */
39 NETIF_F_TSO6_BIT, /* ... TCPv6 segmentation */
40 NETIF_F_FSO_BIT, /* ... FCoE segmentation */
41 NETIF_F_GSO_GRE_BIT, /* ... GRE with TSO */
42 NETIF_F_GSO_GRE_CSUM_BIT, /* ... GRE with csum with TSO */
43 NETIF_F_GSO_IPXIP4_BIT, /* ... IP4 or IP6 over IP4 with TSO */
44 NETIF_F_GSO_IPXIP6_BIT, /* ... IP4 or IP6 over IP6 with TSO */
45 NETIF_F_GSO_UDP_TUNNEL_BIT, /* ... UDP TUNNEL with TSO */
46 NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
47 NETIF_F_GSO_PARTIAL_BIT, /* ... Only segment inner-most L4
48 * in hardware and all other
49 * headers in software.
50 */
51 NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */
52 NETIF_F_GSO_SCTP_BIT, /* ... SCTP fragmentation */
53 NETIF_F_GSO_ESP_BIT, /* ... ESP with TSO */
54 NETIF_F_GSO_UDP_BIT, /* ... UFO, deprecated except tuntap */
55 NETIF_F_GSO_UDP_L4_BIT, /* ... UDP payload GSO (not UFO) */
56 NETIF_F_GSO_FRAGLIST_BIT, /* ... Fraglist GSO */
57 /**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */
58 NETIF_F_GSO_FRAGLIST_BIT,
59
60 NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
61 NETIF_F_SCTP_CRC_BIT, /* SCTP checksum offload */
62 NETIF_F_FCOE_MTU_BIT, /* Supports max FCoE MTU, 2158 bytes*/
63 NETIF_F_NTUPLE_BIT, /* N-tuple filters supported */
64 NETIF_F_RXHASH_BIT, /* Receive hashing offload */
65 NETIF_F_RXCSUM_BIT, /* Receive checksumming offload */
66 NETIF_F_NOCACHE_COPY_BIT, /* Use no-cache copyfromuser */
67 NETIF_F_LOOPBACK_BIT, /* Enable loopback */
68 NETIF_F_RXFCS_BIT, /* Append FCS to skb pkt data */
69 NETIF_F_RXALL_BIT, /* Receive errored frames too */
70 NETIF_F_HW_VLAN_STAG_TX_BIT, /* Transmit VLAN STAG HW acceleration */
71 NETIF_F_HW_VLAN_STAG_RX_BIT, /* Receive VLAN STAG HW acceleration */
72 NETIF_F_HW_VLAN_STAG_FILTER_BIT,/* Receive filtering on VLAN STAGs */
73 NETIF_F_HW_L2FW_DOFFLOAD_BIT, /* Allow L2 Forwarding in Hardware */
74
75 NETIF_F_HW_TC_BIT, /* Offload TC infrastructure */
76 NETIF_F_HW_ESP_BIT, /* Hardware ESP transformation offload */
77 NETIF_F_HW_ESP_TX_CSUM_BIT, /* ESP with TX checksum offload */
78 NETIF_F_RX_UDP_TUNNEL_PORT_BIT, /* Offload of RX port for UDP tunnels */
79 NETIF_F_HW_TLS_TX_BIT, /* Hardware TLS TX offload */
80 NETIF_F_HW_TLS_RX_BIT, /* Hardware TLS RX offload */
81
82 NETIF_F_GRO_HW_BIT, /* Hardware Generic receive offload */
83 NETIF_F_HW_TLS_RECORD_BIT, /* Offload TLS record */
84 NETIF_F_GRO_FRAGLIST_BIT, /* Fraglist GRO */
85
86 NETIF_F_HW_MACSEC_BIT, /* Offload MACsec operations */
87 NETIF_F_GRO_UDP_FWD_BIT, /* Allow UDP GRO for forwarding */
88
89 NETIF_F_HW_HSR_TAG_INS_BIT, /* Offload HSR tag insertion */
90 NETIF_F_HW_HSR_TAG_RM_BIT, /* Offload HSR tag removal */
91 NETIF_F_HW_HSR_FWD_BIT, /* Offload HSR forwarding */
92 NETIF_F_HW_HSR_DUP_BIT, /* Offload HSR duplication */
93
94 /*
95 * Add your fresh new feature above and remember to update
96 * netdev_features_strings[] in net/ethtool/common.c and maybe
97 * some feature mask #defines below. Please also describe it
98 * in Documentation/networking/netdev-features.rst.
99 */
100
101 /**/NETDEV_FEATURE_COUNT
102};
103
104/* copy'n'paste compression ;) */
105#define __NETIF_F_BIT(bit) ((netdev_features_t)1 << (bit))
106#define __NETIF_F(name) __NETIF_F_BIT(NETIF_F_##name##_BIT)
107
108#define NETIF_F_FCOE_CRC __NETIF_F(FCOE_CRC)
109#define NETIF_F_FCOE_MTU __NETIF_F(FCOE_MTU)
110#define NETIF_F_FRAGLIST __NETIF_F(FRAGLIST)
111#define NETIF_F_FSO __NETIF_F(FSO)
112#define NETIF_F_GRO __NETIF_F(GRO)
113#define NETIF_F_GRO_HW __NETIF_F(GRO_HW)
114#define NETIF_F_GSO __NETIF_F(GSO)
115#define NETIF_F_GSO_ROBUST __NETIF_F(GSO_ROBUST)
116#define NETIF_F_HIGHDMA __NETIF_F(HIGHDMA)
117#define NETIF_F_HW_CSUM __NETIF_F(HW_CSUM)
118#define NETIF_F_HW_VLAN_CTAG_FILTER __NETIF_F(HW_VLAN_CTAG_FILTER)
119#define NETIF_F_HW_VLAN_CTAG_RX __NETIF_F(HW_VLAN_CTAG_RX)
120#define NETIF_F_HW_VLAN_CTAG_TX __NETIF_F(HW_VLAN_CTAG_TX)
121#define NETIF_F_IP_CSUM __NETIF_F(IP_CSUM)
122#define NETIF_F_IPV6_CSUM __NETIF_F(IPV6_CSUM)
123#define NETIF_F_LLTX __NETIF_F(LLTX)
124#define NETIF_F_LOOPBACK __NETIF_F(LOOPBACK)
125#define NETIF_F_LRO __NETIF_F(LRO)
126#define NETIF_F_NETNS_LOCAL __NETIF_F(NETNS_LOCAL)
127#define NETIF_F_NOCACHE_COPY __NETIF_F(NOCACHE_COPY)
128#define NETIF_F_NTUPLE __NETIF_F(NTUPLE)
129#define NETIF_F_RXCSUM __NETIF_F(RXCSUM)
130#define NETIF_F_RXHASH __NETIF_F(RXHASH)
131#define NETIF_F_SCTP_CRC __NETIF_F(SCTP_CRC)
132#define NETIF_F_SG __NETIF_F(SG)
133#define NETIF_F_TSO6 __NETIF_F(TSO6)
134#define NETIF_F_TSO_ECN __NETIF_F(TSO_ECN)
135#define NETIF_F_TSO __NETIF_F(TSO)
136#define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
137#define NETIF_F_RXFCS __NETIF_F(RXFCS)
138#define NETIF_F_RXALL __NETIF_F(RXALL)
139#define NETIF_F_GSO_GRE __NETIF_F(GSO_GRE)
140#define NETIF_F_GSO_GRE_CSUM __NETIF_F(GSO_GRE_CSUM)
141#define NETIF_F_GSO_IPXIP4 __NETIF_F(GSO_IPXIP4)
142#define NETIF_F_GSO_IPXIP6 __NETIF_F(GSO_IPXIP6)
143#define NETIF_F_GSO_UDP_TUNNEL __NETIF_F(GSO_UDP_TUNNEL)
144#define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM)
145#define NETIF_F_TSO_MANGLEID __NETIF_F(TSO_MANGLEID)
146#define NETIF_F_GSO_PARTIAL __NETIF_F(GSO_PARTIAL)
147#define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM)
148#define NETIF_F_GSO_SCTP __NETIF_F(GSO_SCTP)
149#define NETIF_F_GSO_ESP __NETIF_F(GSO_ESP)
150#define NETIF_F_GSO_UDP __NETIF_F(GSO_UDP)
151#define NETIF_F_HW_VLAN_STAG_FILTER __NETIF_F(HW_VLAN_STAG_FILTER)
152#define NETIF_F_HW_VLAN_STAG_RX __NETIF_F(HW_VLAN_STAG_RX)
153#define NETIF_F_HW_VLAN_STAG_TX __NETIF_F(HW_VLAN_STAG_TX)
154#define NETIF_F_HW_L2FW_DOFFLOAD __NETIF_F(HW_L2FW_DOFFLOAD)
155#define NETIF_F_HW_TC __NETIF_F(HW_TC)
156#define NETIF_F_HW_ESP __NETIF_F(HW_ESP)
157#define NETIF_F_HW_ESP_TX_CSUM __NETIF_F(HW_ESP_TX_CSUM)
158#define NETIF_F_RX_UDP_TUNNEL_PORT __NETIF_F(RX_UDP_TUNNEL_PORT)
159#define NETIF_F_HW_TLS_RECORD __NETIF_F(HW_TLS_RECORD)
160#define NETIF_F_GSO_UDP_L4 __NETIF_F(GSO_UDP_L4)
161#define NETIF_F_HW_TLS_TX __NETIF_F(HW_TLS_TX)
162#define NETIF_F_HW_TLS_RX __NETIF_F(HW_TLS_RX)
163#define NETIF_F_GRO_FRAGLIST __NETIF_F(GRO_FRAGLIST)
164#define NETIF_F_GSO_FRAGLIST __NETIF_F(GSO_FRAGLIST)
165#define NETIF_F_HW_MACSEC __NETIF_F(HW_MACSEC)
166#define NETIF_F_GRO_UDP_FWD __NETIF_F(GRO_UDP_FWD)
167#define NETIF_F_HW_HSR_TAG_INS __NETIF_F(HW_HSR_TAG_INS)
168#define NETIF_F_HW_HSR_TAG_RM __NETIF_F(HW_HSR_TAG_RM)
169#define NETIF_F_HW_HSR_FWD __NETIF_F(HW_HSR_FWD)
170#define NETIF_F_HW_HSR_DUP __NETIF_F(HW_HSR_DUP)
171
172/* Finds the next feature with the highest number of the range of start-1 till 0.
173 */
174static inline int find_next_netdev_feature(u64 feature, unsigned long start)
175{
176 /* like BITMAP_LAST_WORD_MASK() for u64
177 * this sets the most significant 64 - start to 0.
178 */
179 feature &= ~0ULL >> (-start & ((sizeof(feature) * 8) - 1));
180
181 return fls64(feature) - 1;
182}
183
184/* This goes for the MSB to the LSB through the set feature bits,
185 * mask_addr should be a u64 and bit an int
186 */
187#define for_each_netdev_feature(mask_addr, bit) \
188 for ((bit) = find_next_netdev_feature((mask_addr), \
189 NETDEV_FEATURE_COUNT); \
190 (bit) >= 0; \
191 (bit) = find_next_netdev_feature((mask_addr), (bit)))
192
193/* Features valid for ethtool to change */
194/* = all defined minus driver/device-class-related */
195#define NETIF_F_NEVER_CHANGE (NETIF_F_VLAN_CHALLENGED | \
196 NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
197
198/* remember that ((t)1 << t_BITS) is undefined in C99 */
199#define NETIF_F_ETHTOOL_BITS ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
200 (__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
201 ~NETIF_F_NEVER_CHANGE)
202
203/* Segmentation offload feature mask */
204#define NETIF_F_GSO_MASK (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
205 __NETIF_F_BIT(NETIF_F_GSO_SHIFT))
206
207/* List of IP checksum features. Note that NETIF_F_HW_CSUM should not be
208 * set in features when NETIF_F_IP_CSUM or NETIF_F_IPV6_CSUM are set--
209 * this would be contradictory
210 */
211#define NETIF_F_CSUM_MASK (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | \
212 NETIF_F_HW_CSUM)
213
214#define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | \
215 NETIF_F_TSO_ECN | NETIF_F_TSO_MANGLEID)
216
217#define NETIF_F_ALL_FCOE (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
218 NETIF_F_FSO)
219
220/* List of features with software fallbacks. */
221#define NETIF_F_GSO_SOFTWARE (NETIF_F_ALL_TSO | NETIF_F_GSO_SCTP | \
222 NETIF_F_GSO_UDP_L4 | NETIF_F_GSO_FRAGLIST)
223
224/*
225 * If one device supports one of these features, then enable them
226 * for all in netdev_increment_features.
227 */
228#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
229 NETIF_F_SG | NETIF_F_HIGHDMA | \
230 NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
231
232/*
233 * If one device doesn't support one of these features, then disable it
234 * for all in netdev_increment_features.
235 */
236#define NETIF_F_ALL_FOR_ALL (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
237
238/*
239 * If upper/master device has these features disabled, they must be disabled
240 * on all lower/slave devices as well.
241 */
242#define NETIF_F_UPPER_DISABLES NETIF_F_LRO
243
244/* changeable features with no special hardware requirements */
245#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
246
247/* Changeable features with no special hardware requirements that defaults to off. */
248#define NETIF_F_SOFT_FEATURES_OFF (NETIF_F_GRO_FRAGLIST | NETIF_F_GRO_UDP_FWD)
249
250#define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \
251 NETIF_F_HW_VLAN_CTAG_RX | \
252 NETIF_F_HW_VLAN_CTAG_TX | \
253 NETIF_F_HW_VLAN_STAG_FILTER | \
254 NETIF_F_HW_VLAN_STAG_RX | \
255 NETIF_F_HW_VLAN_STAG_TX)
256
257#define NETIF_F_GSO_ENCAP_ALL (NETIF_F_GSO_GRE | \
258 NETIF_F_GSO_GRE_CSUM | \
259 NETIF_F_GSO_IPXIP4 | \
260 NETIF_F_GSO_IPXIP6 | \
261 NETIF_F_GSO_UDP_TUNNEL | \
262 NETIF_F_GSO_UDP_TUNNEL_CSUM)
263
264#endif /* _LINUX_NETDEV_FEATURES_H */
265

source code of linux/include/linux/netdev_features.h