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netdev_features.h
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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 
13 #include <linux/types.h>
14 
16 
17 enum {
18  NETIF_F_SG_BIT, /* Scatter/gather IO. */
19  NETIF_F_IP_CSUM_BIT, /* Can checksum TCP/UDP over IPv4. */
21  NETIF_F_HW_CSUM_BIT, /* Can checksum all the packets. */
22  NETIF_F_IPV6_CSUM_BIT, /* Can checksum TCP/UDP over IPV6 */
23  NETIF_F_HIGHDMA_BIT, /* Can DMA to high memory. */
24  NETIF_F_FRAGLIST_BIT, /* Scatter/gather IO. */
25  NETIF_F_HW_VLAN_TX_BIT, /* Transmit VLAN hw acceleration */
26  NETIF_F_HW_VLAN_RX_BIT, /* Receive VLAN hw acceleration */
27  NETIF_F_HW_VLAN_FILTER_BIT, /* Receive filtering on VLAN */
28  NETIF_F_VLAN_CHALLENGED_BIT, /* Device cannot handle VLAN packets */
29  NETIF_F_GSO_BIT, /* Enable software GSO. */
30  NETIF_F_LLTX_BIT, /* LockLess TX - deprecated. Please */
31  /* do not use LLTX in new drivers */
32  NETIF_F_NETNS_LOCAL_BIT, /* Does not change network namespaces */
33  NETIF_F_GRO_BIT, /* Generic receive offload */
34  NETIF_F_LRO_BIT, /* large receive offload */
35 
36  NETIF_F_GSO_SHIFT, /* keep the order of SKB_GSO_* bits */
37  NETIF_F_TSO_BIT /* ... TCPv4 segmentation */
39  NETIF_F_UFO_BIT, /* ... UDPv4 fragmentation */
40  NETIF_F_GSO_ROBUST_BIT, /* ... ->SKB_GSO_DODGY */
41  NETIF_F_TSO_ECN_BIT, /* ... TCP ECN support */
42  NETIF_F_TSO6_BIT, /* ... TCPv6 segmentation */
43  NETIF_F_FSO_BIT, /* ... FCoE segmentation */
44  NETIF_F_GSO_RESERVED1, /* ... free (fill GSO_MASK to 8 bits) */
45  NETIF_F_GSO_LAST, /* [can't be last bit, see GSO_MASK] */
46  NETIF_F_GSO_RESERVED2 /* ... free (fill GSO_MASK to 8 bits) */
48 
49  NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
50  NETIF_F_SCTP_CSUM_BIT, /* SCTP checksum offload */
51  NETIF_F_FCOE_MTU_BIT, /* Supports max FCoE MTU, 2158 bytes*/
52  NETIF_F_NTUPLE_BIT, /* N-tuple filters supported */
53  NETIF_F_RXHASH_BIT, /* Receive hashing offload */
54  NETIF_F_RXCSUM_BIT, /* Receive checksumming offload */
55  NETIF_F_NOCACHE_COPY_BIT, /* Use no-cache copyfromuser */
56  NETIF_F_LOOPBACK_BIT, /* Enable loopback */
57  NETIF_F_RXFCS_BIT, /* Append FCS to skb pkt data */
58  NETIF_F_RXALL_BIT, /* Receive errored frames too */
59 
60  /*
61  * Add your fresh new feature above and remember to update
62  * netdev_features_strings[] in net/core/ethtool.c and maybe
63  * some feature mask #defines below. Please also describe it
64  * in Documentation/networking/netdev-features.txt.
65  */
66 
68 };
69 
70 /* copy'n'paste compression ;) */
71 #define __NETIF_F_BIT(bit) ((netdev_features_t)1 << (bit))
72 #define __NETIF_F(name) __NETIF_F_BIT(NETIF_F_##name##_BIT)
73 
74 #define NETIF_F_FCOE_CRC __NETIF_F(FCOE_CRC)
75 #define NETIF_F_FCOE_MTU __NETIF_F(FCOE_MTU)
76 #define NETIF_F_FRAGLIST __NETIF_F(FRAGLIST)
77 #define NETIF_F_FSO __NETIF_F(FSO)
78 #define NETIF_F_GRO __NETIF_F(GRO)
79 #define NETIF_F_GSO __NETIF_F(GSO)
80 #define NETIF_F_GSO_ROBUST __NETIF_F(GSO_ROBUST)
81 #define NETIF_F_HIGHDMA __NETIF_F(HIGHDMA)
82 #define NETIF_F_HW_CSUM __NETIF_F(HW_CSUM)
83 #define NETIF_F_HW_VLAN_FILTER __NETIF_F(HW_VLAN_FILTER)
84 #define NETIF_F_HW_VLAN_RX __NETIF_F(HW_VLAN_RX)
85 #define NETIF_F_HW_VLAN_TX __NETIF_F(HW_VLAN_TX)
86 #define NETIF_F_IP_CSUM __NETIF_F(IP_CSUM)
87 #define NETIF_F_IPV6_CSUM __NETIF_F(IPV6_CSUM)
88 #define NETIF_F_LLTX __NETIF_F(LLTX)
89 #define NETIF_F_LOOPBACK __NETIF_F(LOOPBACK)
90 #define NETIF_F_LRO __NETIF_F(LRO)
91 #define NETIF_F_NETNS_LOCAL __NETIF_F(NETNS_LOCAL)
92 #define NETIF_F_NOCACHE_COPY __NETIF_F(NOCACHE_COPY)
93 #define NETIF_F_NTUPLE __NETIF_F(NTUPLE)
94 #define NETIF_F_RXCSUM __NETIF_F(RXCSUM)
95 #define NETIF_F_RXHASH __NETIF_F(RXHASH)
96 #define NETIF_F_SCTP_CSUM __NETIF_F(SCTP_CSUM)
97 #define NETIF_F_SG __NETIF_F(SG)
98 #define NETIF_F_TSO6 __NETIF_F(TSO6)
99 #define NETIF_F_TSO_ECN __NETIF_F(TSO_ECN)
100 #define NETIF_F_TSO __NETIF_F(TSO)
101 #define NETIF_F_UFO __NETIF_F(UFO)
102 #define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
103 #define NETIF_F_RXFCS __NETIF_F(RXFCS)
104 #define NETIF_F_RXALL __NETIF_F(RXALL)
105 
106 /* Features valid for ethtool to change */
107 /* = all defined minus driver/device-class-related */
108 #define NETIF_F_NEVER_CHANGE (NETIF_F_VLAN_CHALLENGED | \
109  NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
110 
111 /* remember that ((t)1 << t_BITS) is undefined in C99 */
112 #define NETIF_F_ETHTOOL_BITS ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
113  (__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
114  ~NETIF_F_NEVER_CHANGE)
115 
116 /* Segmentation offload feature mask */
117 #define NETIF_F_GSO_MASK (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
118  __NETIF_F_BIT(NETIF_F_GSO_SHIFT))
119 
120 /* List of features with software fallbacks. */
121 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
122  NETIF_F_TSO6 | NETIF_F_UFO)
123 
124 #define NETIF_F_GEN_CSUM NETIF_F_HW_CSUM
125 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
126 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
127 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
128 
129 #define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
130 
131 #define NETIF_F_ALL_FCOE (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
132  NETIF_F_FSO)
133 
134 /*
135  * If one device supports one of these features, then enable them
136  * for all in netdev_increment_features.
137  */
138 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
139  NETIF_F_SG | NETIF_F_HIGHDMA | \
140  NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
141 /*
142  * If one device doesn't support one of these features, then disable it
143  * for all in netdev_increment_features.
144  */
145 #define NETIF_F_ALL_FOR_ALL (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
146 
147 /* changeable features with no special hardware requirements */
148 #define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
149 
150 #endif /* _LINUX_NETDEV_FEATURES_H */