2 * Network device features.
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.
10 #ifndef _LINUX_NETDEV_FEATURES_H
11 #define _LINUX_NETDEV_FEATURES_H
13 /* Net device feature bits; if you change something,
14 * also update netdev_features_strings[] in ethtool.c */
16 #define NETIF_F_SG 1 /* Scatter/gather IO. */
17 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
18 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
19 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
20 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
21 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
22 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
23 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
24 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
25 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
26 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
27 #define NETIF_F_GSO 2048 /* Enable software GSO. */
28 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
29 /* do not use LLTX in new drivers */
30 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
31 #define NETIF_F_GRO 16384 /* Generic receive offload */
32 #define NETIF_F_LRO 32768 /* large receive offload */
34 /* the GSO_MASK reserves bits 16 through 23 */
35 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
36 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
37 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
38 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
39 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
40 #define NETIF_F_RXCSUM (1 << 29) /* Receive checksumming offload */
41 #define NETIF_F_NOCACHE_COPY (1 << 30) /* Use no-cache copyfromuser */
42 #define NETIF_F_LOOPBACK (1 << 31) /* Enable loopback */
44 /* Segmentation offload features */
45 #define NETIF_F_GSO_SHIFT 16
46 #define NETIF_F_GSO_MASK 0x00ff0000
47 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
48 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
49 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
50 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
51 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
52 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
54 /* Features valid for ethtool to change */
55 /* = all defined minus driver/device-class-related */
56 #define NETIF_F_NEVER_CHANGE (NETIF_F_VLAN_CHALLENGED | \
57 NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
58 #define NETIF_F_ETHTOOL_BITS (0xff3fffff & ~NETIF_F_NEVER_CHANGE)
60 /* List of features with software fallbacks. */
61 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
62 NETIF_F_TSO6 | NETIF_F_UFO)
64 #define NETIF_F_GEN_CSUM (NETIF_F_HW_CSUM | NETIF_F_NO_CSUM)
65 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
66 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
67 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
69 #define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
71 #define NETIF_F_ALL_FCOE (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
75 * If one device supports one of these features, then enable them
76 * for all in netdev_increment_features.
78 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
79 NETIF_F_SG | NETIF_F_HIGHDMA | \
80 NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
82 * If one device doesn't support one of these features, then disable it
83 * for all in netdev_increment_features.
85 #define NETIF_F_ALL_FOR_ALL (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
87 /* changeable features with no special hardware requirements */
88 #define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
90 #endif /* _LINUX_NETDEV_FEATURES_H */