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1/*
2 * Network device features.
3 *
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.
9 */
10#ifndef _LINUX_NETDEV_FEATURES_H
11#define _LINUX_NETDEV_FEATURES_H
12
c8f44aff 13#include <linux/types.h>
8681ef1f 14#include <linux/bitops.h>
3b89ea9c 15#include <asm/byteorder.h>
c8f44aff 16
a861a8b2 17typedef u64 netdev_features_t;
c8f44aff 18
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19enum {
20 NETIF_F_SG_BIT, /* Scatter/gather IO. */
21 NETIF_F_IP_CSUM_BIT, /* Can checksum TCP/UDP over IPv4. */
34324dc2 22 __UNUSED_NETIF_F_1,
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23 NETIF_F_HW_CSUM_BIT, /* Can checksum all the packets. */
24 NETIF_F_IPV6_CSUM_BIT, /* Can checksum TCP/UDP over IPV6 */
25 NETIF_F_HIGHDMA_BIT, /* Can DMA to high memory. */
26 NETIF_F_FRAGLIST_BIT, /* Scatter/gather IO. */
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27 NETIF_F_HW_VLAN_CTAG_TX_BIT, /* Transmit VLAN CTAG HW acceleration */
28 NETIF_F_HW_VLAN_CTAG_RX_BIT, /* Receive VLAN CTAG HW acceleration */
29 NETIF_F_HW_VLAN_CTAG_FILTER_BIT,/* Receive filtering on VLAN CTAGs */
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30 NETIF_F_VLAN_CHALLENGED_BIT, /* Device cannot handle VLAN packets */
31 NETIF_F_GSO_BIT, /* Enable software GSO. */
32 NETIF_F_LLTX_BIT, /* LockLess TX - deprecated. Please */
a59e2ecb 33 /* do not use LLTX in new drivers */
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34 NETIF_F_NETNS_LOCAL_BIT, /* Does not change network namespaces */
35 NETIF_F_GRO_BIT, /* Generic receive offload */
36 NETIF_F_LRO_BIT, /* large receive offload */
37
38 /**/NETIF_F_GSO_SHIFT, /* keep the order of SKB_GSO_* bits */
39 NETIF_F_TSO_BIT /* ... TCPv4 segmentation */
40 = NETIF_F_GSO_SHIFT,
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41 NETIF_F_GSO_ROBUST_BIT, /* ... ->SKB_GSO_DODGY */
42 NETIF_F_TSO_ECN_BIT, /* ... TCP ECN support */
cbc53e08 43 NETIF_F_TSO_MANGLEID_BIT, /* ... IPV4 ID mangling allowed */
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44 NETIF_F_TSO6_BIT, /* ... TCPv6 segmentation */
45 NETIF_F_FSO_BIT, /* ... FCoE segmentation */
68c33163 46 NETIF_F_GSO_GRE_BIT, /* ... GRE with TSO */
4749c09c 47 NETIF_F_GSO_GRE_CSUM_BIT, /* ... GRE with csum with TSO */
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48 NETIF_F_GSO_IPXIP4_BIT, /* ... IP4 or IP6 over IP4 with TSO */
49 NETIF_F_GSO_IPXIP6_BIT, /* ... IP4 or IP6 over IP6 with TSO */
73136267 50 NETIF_F_GSO_UDP_TUNNEL_BIT, /* ... UDP TUNNEL with TSO */
0f4f4ffa 51 NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
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52 NETIF_F_GSO_PARTIAL_BIT, /* ... Only segment inner-most L4
53 * in hardware and all other
54 * headers in software.
55 */
e585f236 56 NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */
90017acc 57 NETIF_F_GSO_SCTP_BIT, /* ... SCTP fragmentation */
c7ef8f0c 58 NETIF_F_GSO_ESP_BIT, /* ... ESP with TSO */
0c19f846 59 NETIF_F_GSO_UDP_BIT, /* ... UFO, deprecated except tuntap */
83aa025f 60 NETIF_F_GSO_UDP_L4_BIT, /* ... UDP payload GSO (not UFO) */
73136267 61 /**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */
83aa025f 62 NETIF_F_GSO_UDP_L4_BIT,
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63
64 NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
53692b1d 65 NETIF_F_SCTP_CRC_BIT, /* SCTP checksum offload */
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66 NETIF_F_FCOE_MTU_BIT, /* Supports max FCoE MTU, 2158 bytes*/
67 NETIF_F_NTUPLE_BIT, /* N-tuple filters supported */
68 NETIF_F_RXHASH_BIT, /* Receive hashing offload */
69 NETIF_F_RXCSUM_BIT, /* Receive checksumming offload */
70 NETIF_F_NOCACHE_COPY_BIT, /* Use no-cache copyfromuser */
71 NETIF_F_LOOPBACK_BIT, /* Enable loopback */
36eabda3 72 NETIF_F_RXFCS_BIT, /* Append FCS to skb pkt data */
5e0c03c8 73 NETIF_F_RXALL_BIT, /* Receive errored frames too */
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74 NETIF_F_HW_VLAN_STAG_TX_BIT, /* Transmit VLAN STAG HW acceleration */
75 NETIF_F_HW_VLAN_STAG_RX_BIT, /* Receive VLAN STAG HW acceleration */
76 NETIF_F_HW_VLAN_STAG_FILTER_BIT,/* Receive filtering on VLAN STAGs */
a6cc0cfa 77 NETIF_F_HW_L2FW_DOFFLOAD_BIT, /* Allow L2 Forwarding in Hardware */
a19f2a6d 78
1c78c64e 79 NETIF_F_HW_TC_BIT, /* Offload TC infrastructure */
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80 NETIF_F_HW_ESP_BIT, /* Hardware ESP transformation offload */
81 NETIF_F_HW_ESP_TX_CSUM_BIT, /* ESP with TX checksum offload */
d764a122 82 NETIF_F_RX_UDP_TUNNEL_PORT_BIT, /* Offload of RX port for UDP tunnels */
2342a851 83 NETIF_F_HW_TLS_TX_BIT, /* Hardware TLS TX offload */
14136564 84 NETIF_F_HW_TLS_RX_BIT, /* Hardware TLS RX offload */
1c78c64e 85
fb1f5f79 86 NETIF_F_GRO_HW_BIT, /* Hardware Generic receive offload */
e0be6bea 87 NETIF_F_HW_TLS_RECORD_BIT, /* Offload TLS record */
fb1f5f79 88
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89 /*
90 * Add your fresh new feature above and remember to update
91 * netdev_features_strings[] in net/core/ethtool.c and maybe
92 * some feature mask #defines below. Please also describe it
93 * in Documentation/networking/netdev-features.txt.
94 */
a59e2ecb 95
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96 /**/NETDEV_FEATURE_COUNT
97};
a59e2ecb 98
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99/* copy'n'paste compression ;) */
100#define __NETIF_F_BIT(bit) ((netdev_features_t)1 << (bit))
101#define __NETIF_F(name) __NETIF_F_BIT(NETIF_F_##name##_BIT)
102
103#define NETIF_F_FCOE_CRC __NETIF_F(FCOE_CRC)
104#define NETIF_F_FCOE_MTU __NETIF_F(FCOE_MTU)
105#define NETIF_F_FRAGLIST __NETIF_F(FRAGLIST)
106#define NETIF_F_FSO __NETIF_F(FSO)
107#define NETIF_F_GRO __NETIF_F(GRO)
fb1f5f79 108#define NETIF_F_GRO_HW __NETIF_F(GRO_HW)
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109#define NETIF_F_GSO __NETIF_F(GSO)
110#define NETIF_F_GSO_ROBUST __NETIF_F(GSO_ROBUST)
111#define NETIF_F_HIGHDMA __NETIF_F(HIGHDMA)
112#define NETIF_F_HW_CSUM __NETIF_F(HW_CSUM)
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113#define NETIF_F_HW_VLAN_CTAG_FILTER __NETIF_F(HW_VLAN_CTAG_FILTER)
114#define NETIF_F_HW_VLAN_CTAG_RX __NETIF_F(HW_VLAN_CTAG_RX)
115#define NETIF_F_HW_VLAN_CTAG_TX __NETIF_F(HW_VLAN_CTAG_TX)
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116#define NETIF_F_IP_CSUM __NETIF_F(IP_CSUM)
117#define NETIF_F_IPV6_CSUM __NETIF_F(IPV6_CSUM)
118#define NETIF_F_LLTX __NETIF_F(LLTX)
119#define NETIF_F_LOOPBACK __NETIF_F(LOOPBACK)
120#define NETIF_F_LRO __NETIF_F(LRO)
121#define NETIF_F_NETNS_LOCAL __NETIF_F(NETNS_LOCAL)
122#define NETIF_F_NOCACHE_COPY __NETIF_F(NOCACHE_COPY)
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123#define NETIF_F_NTUPLE __NETIF_F(NTUPLE)
124#define NETIF_F_RXCSUM __NETIF_F(RXCSUM)
125#define NETIF_F_RXHASH __NETIF_F(RXHASH)
53692b1d 126#define NETIF_F_SCTP_CRC __NETIF_F(SCTP_CRC)
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127#define NETIF_F_SG __NETIF_F(SG)
128#define NETIF_F_TSO6 __NETIF_F(TSO6)
129#define NETIF_F_TSO_ECN __NETIF_F(TSO_ECN)
130#define NETIF_F_TSO __NETIF_F(TSO)
a19f2a6d 131#define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
36eabda3 132#define NETIF_F_RXFCS __NETIF_F(RXFCS)
5e0c03c8 133#define NETIF_F_RXALL __NETIF_F(RXALL)
a362db3d 134#define NETIF_F_GSO_GRE __NETIF_F(GSO_GRE)
4749c09c 135#define NETIF_F_GSO_GRE_CSUM __NETIF_F(GSO_GRE_CSUM)
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136#define NETIF_F_GSO_IPXIP4 __NETIF_F(GSO_IPXIP4)
137#define NETIF_F_GSO_IPXIP6 __NETIF_F(GSO_IPXIP6)
a362db3d 138#define NETIF_F_GSO_UDP_TUNNEL __NETIF_F(GSO_UDP_TUNNEL)
4b28252c 139#define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM)
cbc53e08 140#define NETIF_F_TSO_MANGLEID __NETIF_F(TSO_MANGLEID)
802ab55a 141#define NETIF_F_GSO_PARTIAL __NETIF_F(GSO_PARTIAL)
e585f236 142#define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM)
90017acc 143#define NETIF_F_GSO_SCTP __NETIF_F(GSO_SCTP)
c7ef8f0c 144#define NETIF_F_GSO_ESP __NETIF_F(GSO_ESP)
0c19f846 145#define NETIF_F_GSO_UDP __NETIF_F(GSO_UDP)
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146#define NETIF_F_HW_VLAN_STAG_FILTER __NETIF_F(HW_VLAN_STAG_FILTER)
147#define NETIF_F_HW_VLAN_STAG_RX __NETIF_F(HW_VLAN_STAG_RX)
148#define NETIF_F_HW_VLAN_STAG_TX __NETIF_F(HW_VLAN_STAG_TX)
a6cc0cfa 149#define NETIF_F_HW_L2FW_DOFFLOAD __NETIF_F(HW_L2FW_DOFFLOAD)
1c78c64e 150#define NETIF_F_HW_TC __NETIF_F(HW_TC)
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151#define NETIF_F_HW_ESP __NETIF_F(HW_ESP)
152#define NETIF_F_HW_ESP_TX_CSUM __NETIF_F(HW_ESP_TX_CSUM)
d764a122 153#define NETIF_F_RX_UDP_TUNNEL_PORT __NETIF_F(RX_UDP_TUNNEL_PORT)
e0be6bea 154#define NETIF_F_HW_TLS_RECORD __NETIF_F(HW_TLS_RECORD)
83aa025f 155#define NETIF_F_GSO_UDP_L4 __NETIF_F(GSO_UDP_L4)
2342a851 156#define NETIF_F_HW_TLS_TX __NETIF_F(HW_TLS_TX)
14136564 157#define NETIF_F_HW_TLS_RX __NETIF_F(HW_TLS_RX)
a59e2ecb 158
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159/* Finds the next feature with the highest number of the range of start till 0.
160 */
161static inline int find_next_netdev_feature(u64 feature, unsigned long start)
162{
163 /* like BITMAP_LAST_WORD_MASK() for u64
164 * this sets the most significant 64 - start to 0.
165 */
166 feature &= ~0ULL >> (-start & ((sizeof(feature) * 8) - 1));
167
168 return fls64(feature) - 1;
169}
170
171/* This goes for the MSB to the LSB through the set feature bits,
172 * mask_addr should be a u64 and bit an int
173 */
174#define for_each_netdev_feature(mask_addr, bit) \
175 for ((bit) = find_next_netdev_feature((mask_addr), \
176 NETDEV_FEATURE_COUNT); \
177 (bit) >= 0; \
178 (bit) = find_next_netdev_feature((mask_addr), (bit) - 1))
fd867d51 179
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180/* Features valid for ethtool to change */
181/* = all defined minus driver/device-class-related */
182#define NETIF_F_NEVER_CHANGE (NETIF_F_VLAN_CHALLENGED | \
183 NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
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184
185/* remember that ((t)1 << t_BITS) is undefined in C99 */
186#define NETIF_F_ETHTOOL_BITS ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
187 (__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
188 ~NETIF_F_NEVER_CHANGE)
189
190/* Segmentation offload feature mask */
191#define NETIF_F_GSO_MASK (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
192 __NETIF_F_BIT(NETIF_F_GSO_SHIFT))
a59e2ecb 193
c8cd0989 194/* List of IP checksum features. Note that NETIF_F_ HW_CSUM should not be
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195 * set in features when NETIF_F_IP_CSUM or NETIF_F_IPV6_CSUM are set--
196 * this would be contradictory
197 */
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198#define NETIF_F_CSUM_MASK (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | \
199 NETIF_F_HW_CSUM)
a59e2ecb 200
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201#define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | \
202 NETIF_F_TSO_ECN | NETIF_F_TSO_MANGLEID)
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203
204#define NETIF_F_ALL_FCOE (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
205 NETIF_F_FSO)
206
b1c20f0b 207/* List of features with software fallbacks. */
d9d30adf 208#define NETIF_F_GSO_SOFTWARE (NETIF_F_ALL_TSO | \
90017acc 209 NETIF_F_GSO_SCTP)
b1c20f0b 210
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211/*
212 * If one device supports one of these features, then enable them
213 * for all in netdev_increment_features.
214 */
215#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
216 NETIF_F_SG | NETIF_F_HIGHDMA | \
7889cbee 217 NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
aafb3e98 218
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219/*
220 * If one device doesn't support one of these features, then disable it
221 * for all in netdev_increment_features.
222 */
223#define NETIF_F_ALL_FOR_ALL (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
224
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225/*
226 * If upper/master device has these features disabled, they must be disabled
227 * on all lower/slave devices as well.
228 */
229#define NETIF_F_UPPER_DISABLES NETIF_F_LRO
230
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231/* changeable features with no special hardware requirements */
232#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
233
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234#define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \
235 NETIF_F_HW_VLAN_CTAG_RX | \
236 NETIF_F_HW_VLAN_CTAG_TX | \
237 NETIF_F_HW_VLAN_STAG_FILTER | \
238 NETIF_F_HW_VLAN_STAG_RX | \
239 NETIF_F_HW_VLAN_STAG_TX)
240
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241#define NETIF_F_GSO_ENCAP_ALL (NETIF_F_GSO_GRE | \
242 NETIF_F_GSO_GRE_CSUM | \
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243 NETIF_F_GSO_IPXIP4 | \
244 NETIF_F_GSO_IPXIP6 | \
f6eec614 245 NETIF_F_GSO_UDP_TUNNEL | \
59b93b41 246 NETIF_F_GSO_UDP_TUNNEL_CSUM)
f6eec614 247
a59e2ecb 248#endif /* _LINUX_NETDEV_FEATURES_H */