linux/include/linux/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
  15typedef u64 netdev_features_t;
  16
  17enum {
  18        NETIF_F_SG_BIT,                 /* Scatter/gather IO. */
  19        NETIF_F_IP_CSUM_BIT,            /* Can checksum TCP/UDP over IPv4. */
  20        __UNUSED_NETIF_F_1,
  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 */
  38                = NETIF_F_GSO_SHIFT,
  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) */
  47                = NETIF_F_GSO_LAST,
  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
  67        /**/NETDEV_FEATURE_COUNT
  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 */
 151
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