LXR linux/include/linux/netdev

   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_CTAG_TX_BIT,    /* Transmit VLAN CTAG HW acceleration */
  26        NETIF_F_HW_VLAN_CTAG_RX_BIT,    /* Receive VLAN CTAG HW acceleration */
  27        NETIF_F_HW_VLAN_CTAG_FILTER_BIT,/* Receive filtering on VLAN CTAGs */
  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_GRE_BIT,            /* ... GRE with TSO */
  45        NETIF_F_GSO_GRE_CSUM_BIT,       /* ... GRE with csum with TSO */
  46        NETIF_F_GSO_IPIP_BIT,           /* ... IPIP tunnel with TSO */
  47        NETIF_F_GSO_SIT_BIT,            /* ... SIT tunnel with TSO */
  48        NETIF_F_GSO_UDP_TUNNEL_BIT,     /* ... UDP TUNNEL with TSO */
  49        NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
  50        NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */
  51        /**/NETIF_F_GSO_LAST =          /* last bit, see GSO_MASK */
  52                NETIF_F_GSO_TUNNEL_REMCSUM_BIT,
  53
  54        NETIF_F_FCOE_CRC_BIT,           /* FCoE CRC32 */
  55        NETIF_F_SCTP_CRC_BIT,           /* SCTP checksum offload */
  56        NETIF_F_FCOE_MTU_BIT,           /* Supports max FCoE MTU, 2158 bytes*/
  57        NETIF_F_NTUPLE_BIT,             /* N-tuple filters supported */
  58        NETIF_F_RXHASH_BIT,             /* Receive hashing offload */
  59        NETIF_F_RXCSUM_BIT,             /* Receive checksumming offload */
  60        NETIF_F_NOCACHE_COPY_BIT,       /* Use no-cache copyfromuser */
  61        NETIF_F_LOOPBACK_BIT,           /* Enable loopback */
  62        NETIF_F_RXFCS_BIT,              /* Append FCS to skb pkt data */
  63        NETIF_F_RXALL_BIT,              /* Receive errored frames too */
  64        NETIF_F_HW_VLAN_STAG_TX_BIT,    /* Transmit VLAN STAG HW acceleration */
  65        NETIF_F_HW_VLAN_STAG_RX_BIT,    /* Receive VLAN STAG HW acceleration */
  66        NETIF_F_HW_VLAN_STAG_FILTER_BIT,/* Receive filtering on VLAN STAGs */
  67        NETIF_F_HW_L2FW_DOFFLOAD_BIT,   /* Allow L2 Forwarding in Hardware */
  68        NETIF_F_BUSY_POLL_BIT,          /* Busy poll */
  69
  70        NETIF_F_HW_TC_BIT,              /* Offload TC infrastructure */
  71
  72        /*
  73         * Add your fresh new feature above and remember to update
  74         * netdev_features_strings[] in net/core/ethtool.c and maybe
  75         * some feature mask #defines below. Please also describe it
  76         * in Documentation/networking/netdev-features.txt.
  77         */
  78
  79        /**/NETDEV_FEATURE_COUNT
  80};
  81
  82/* copy'n'paste compression ;) */
  83#define __NETIF_F_BIT(bit)      ((netdev_features_t)1 << (bit))
  84#define __NETIF_F(name)         __NETIF_F_BIT(NETIF_F_##name##_BIT)
  85
  86#define NETIF_F_FCOE_CRC        __NETIF_F(FCOE_CRC)
  87#define NETIF_F_FCOE_MTU        __NETIF_F(FCOE_MTU)
  88#define NETIF_F_FRAGLIST        __NETIF_F(FRAGLIST)
  89#define NETIF_F_FSO             __NETIF_F(FSO)
  90#define NETIF_F_GRO             __NETIF_F(GRO)
  91#define NETIF_F_GSO             __NETIF_F(GSO)
  92#define NETIF_F_GSO_ROBUST      __NETIF_F(GSO_ROBUST)
  93#define NETIF_F_HIGHDMA         __NETIF_F(HIGHDMA)
  94#define NETIF_F_HW_CSUM         __NETIF_F(HW_CSUM)
  95#define NETIF_F_HW_VLAN_CTAG_FILTER __NETIF_F(HW_VLAN_CTAG_FILTER)
  96#define NETIF_F_HW_VLAN_CTAG_RX __NETIF_F(HW_VLAN_CTAG_RX)
  97#define NETIF_F_HW_VLAN_CTAG_TX __NETIF_F(HW_VLAN_CTAG_TX)
  98#define NETIF_F_IP_CSUM         __NETIF_F(IP_CSUM)
  99#define NETIF_F_IPV6_CSUM       __NETIF_F(IPV6_CSUM)
 100#define NETIF_F_LLTX            __NETIF_F(LLTX)
 101#define NETIF_F_LOOPBACK        __NETIF_F(LOOPBACK)
 102#define NETIF_F_LRO             __NETIF_F(LRO)
 103#define NETIF_F_NETNS_LOCAL     __NETIF_F(NETNS_LOCAL)
 104#define NETIF_F_NOCACHE_COPY    __NETIF_F(NOCACHE_COPY)
 105#define NETIF_F_NTUPLE          __NETIF_F(NTUPLE)
 106#define NETIF_F_RXCSUM          __NETIF_F(RXCSUM)
 107#define NETIF_F_RXHASH          __NETIF_F(RXHASH)
 108#define NETIF_F_SCTP_CRC        __NETIF_F(SCTP_CRC)
 109#define NETIF_F_SG              __NETIF_F(SG)
 110#define NETIF_F_TSO6            __NETIF_F(TSO6)
 111#define NETIF_F_TSO_ECN         __NETIF_F(TSO_ECN)
 112#define NETIF_F_TSO             __NETIF_F(TSO)
 113#define NETIF_F_UFO             __NETIF_F(UFO)
 114#define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
 115#define NETIF_F_RXFCS           __NETIF_F(RXFCS)
 116#define NETIF_F_RXALL           __NETIF_F(RXALL)
 117#define NETIF_F_GSO_GRE         __NETIF_F(GSO_GRE)
 118#define NETIF_F_GSO_GRE_CSUM    __NETIF_F(GSO_GRE_CSUM)
 119#define NETIF_F_GSO_IPIP        __NETIF_F(GSO_IPIP)
 120#define NETIF_F_GSO_SIT         __NETIF_F(GSO_SIT)
 121#define NETIF_F_GSO_UDP_TUNNEL  __NETIF_F(GSO_UDP_TUNNEL)
 122#define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM)
 123#define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM)
 124#define NETIF_F_HW_VLAN_STAG_FILTER __NETIF_F(HW_VLAN_STAG_FILTER)
 125#define NETIF_F_HW_VLAN_STAG_RX __NETIF_F(HW_VLAN_STAG_RX)
 126#define NETIF_F_HW_VLAN_STAG_TX __NETIF_F(HW_VLAN_STAG_TX)
 127#define NETIF_F_HW_L2FW_DOFFLOAD        __NETIF_F(HW_L2FW_DOFFLOAD)
 128#define NETIF_F_BUSY_POLL       __NETIF_F(BUSY_POLL)
 129#define NETIF_F_HW_TC           __NETIF_F(HW_TC)
 130
 131#define for_each_netdev_feature(mask_addr, bit) \
 132        for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)
 133
 134/* Features valid for ethtool to change */
 135/* = all defined minus driver/device-class-related */
 136#define NETIF_F_NEVER_CHANGE    (NETIF_F_VLAN_CHALLENGED | \
 137                                 NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
 138
 139/* remember that ((t)1 << t_BITS) is undefined in C99 */
 140#define NETIF_F_ETHTOOL_BITS    ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
 141                (__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
 142                ~NETIF_F_NEVER_CHANGE)
 143
 144/* Segmentation offload feature mask */
 145#define NETIF_F_GSO_MASK        (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
 146                __NETIF_F_BIT(NETIF_F_GSO_SHIFT))
 147
 148/* List of features with software fallbacks. */
 149#define NETIF_F_GSO_SOFTWARE    (NETIF_F_TSO | NETIF_F_TSO_ECN | \
 150                                 NETIF_F_TSO6 | NETIF_F_UFO)
 151
 152/* List of IP checksum features. Note that NETIF_F_ HW_CSUM should not be
 153 * set in features when NETIF_F_IP_CSUM or NETIF_F_IPV6_CSUM are set--
 154 * this would be contradictory
 155 */
 156#define NETIF_F_CSUM_MASK       (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | \
 157                                 NETIF_F_HW_CSUM)
 158
 159#define NETIF_F_ALL_TSO         (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
 160
 161#define NETIF_F_ALL_FCOE        (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
 162                                 NETIF_F_FSO)
 163
 164/*
 165 * If one device supports one of these features, then enable them
 166 * for all in netdev_increment_features.
 167 */
 168#define NETIF_F_ONE_FOR_ALL     (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
 169                                 NETIF_F_SG | NETIF_F_HIGHDMA |         \
 170                                 NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
 171
 172/*
 173 * If one device doesn't support one of these features, then disable it
 174 * for all in netdev_increment_features.
 175 */
 176#define NETIF_F_ALL_FOR_ALL     (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
 177
 178/*
 179 * If upper/master device has these features disabled, they must be disabled
 180 * on all lower/slave devices as well.
 181 */
 182#define NETIF_F_UPPER_DISABLES  NETIF_F_LRO
 183
 184/* changeable features with no special hardware requirements */
 185#define NETIF_F_SOFT_FEATURES   (NETIF_F_GSO | NETIF_F_GRO)
 186
 187#define NETIF_F_VLAN_FEATURES   (NETIF_F_HW_VLAN_CTAG_FILTER | \
 188                                 NETIF_F_HW_VLAN_CTAG_RX | \
 189                                 NETIF_F_HW_VLAN_CTAG_TX | \
 190                                 NETIF_F_HW_VLAN_STAG_FILTER | \
 191                                 NETIF_F_HW_VLAN_STAG_RX | \
 192                                 NETIF_F_HW_VLAN_STAG_TX)
 193
 194#define NETIF_F_GSO_ENCAP_ALL   (NETIF_F_GSO_GRE |                      \
 195                                 NETIF_F_GSO_GRE_CSUM |                 \
 196                                 NETIF_F_GSO_IPIP |                     \
 197                                 NETIF_F_GSO_SIT |                      \
 198                                 NETIF_F_GSO_UDP_TUNNEL |               \
 199                                 NETIF_F_GSO_UDP_TUNNEL_CSUM)
 200
 201#endif  /* _LINUX_NETDEV_FEATURES_H */
 202