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_TSO_MANGLEID_BIT,       /* ... IPV4 ID mangling allowed */
  43        NETIF_F_TSO6_BIT,               /* ... TCPv6 segmentation */
  44        NETIF_F_FSO_BIT,                /* ... FCoE segmentation */
  45        NETIF_F_GSO_GRE_BIT,            /* ... GRE with TSO */
  46        NETIF_F_GSO_GRE_CSUM_BIT,       /* ... GRE with csum with TSO */
  47        NETIF_F_GSO_IPXIP4_BIT,         /* ... IP4 or IP6 over IP4 with TSO */
  48        NETIF_F_GSO_IPXIP6_BIT,         /* ... IP4 or IP6 over IP6 with TSO */
  49        NETIF_F_GSO_UDP_TUNNEL_BIT,     /* ... UDP TUNNEL with TSO */
  50        NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
  51        NETIF_F_GSO_PARTIAL_BIT,        /* ... Only segment inner-most L4
  52                                         *     in hardware and all other
  53                                         *     headers in software.
  54                                         */
  55        NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */
  56        NETIF_F_GSO_SCTP_BIT,           /* ... SCTP fragmentation */
  57        /**/NETIF_F_GSO_LAST =          /* last bit, see GSO_MASK */
  58                NETIF_F_GSO_SCTP_BIT,
  59
  60        NETIF_F_FCOE_CRC_BIT,           /* FCoE CRC32 */
  61        NETIF_F_SCTP_CRC_BIT,           /* SCTP checksum offload */
  62        NETIF_F_FCOE_MTU_BIT,           /* Supports max FCoE MTU, 2158 bytes*/
  63        NETIF_F_NTUPLE_BIT,             /* N-tuple filters supported */
  64        NETIF_F_RXHASH_BIT,             /* Receive hashing offload */
  65        NETIF_F_RXCSUM_BIT,             /* Receive checksumming offload */
  66        NETIF_F_NOCACHE_COPY_BIT,       /* Use no-cache copyfromuser */
  67        NETIF_F_LOOPBACK_BIT,           /* Enable loopback */
  68        NETIF_F_RXFCS_BIT,              /* Append FCS to skb pkt data */
  69        NETIF_F_RXALL_BIT,              /* Receive errored frames too */
  70        NETIF_F_HW_VLAN_STAG_TX_BIT,    /* Transmit VLAN STAG HW acceleration */
  71        NETIF_F_HW_VLAN_STAG_RX_BIT,    /* Receive VLAN STAG HW acceleration */
  72        NETIF_F_HW_VLAN_STAG_FILTER_BIT,/* Receive filtering on VLAN STAGs */
  73        NETIF_F_HW_L2FW_DOFFLOAD_BIT,   /* Allow L2 Forwarding in Hardware */
  74        NETIF_F_BUSY_POLL_BIT,          /* Busy poll */
  75
  76        NETIF_F_HW_TC_BIT,              /* Offload TC infrastructure */
  77
  78        /*
  79         * Add your fresh new feature above and remember to update
  80         * netdev_features_strings[] in net/core/ethtool.c and maybe
  81         * some feature mask #defines below. Please also describe it
  82         * in Documentation/networking/netdev-features.txt.
  83         */
  84
  85        /**/NETDEV_FEATURE_COUNT
  86};
  87
  88/* copy'n'paste compression ;) */
  89#define __NETIF_F_BIT(bit)      ((netdev_features_t)1 << (bit))
  90#define __NETIF_F(name)         __NETIF_F_BIT(NETIF_F_##name##_BIT)
  91
  92#define NETIF_F_FCOE_CRC        __NETIF_F(FCOE_CRC)
  93#define NETIF_F_FCOE_MTU        __NETIF_F(FCOE_MTU)
  94#define NETIF_F_FRAGLIST        __NETIF_F(FRAGLIST)
  95#define NETIF_F_FSO             __NETIF_F(FSO)
  96#define NETIF_F_GRO             __NETIF_F(GRO)
  97#define NETIF_F_GSO             __NETIF_F(GSO)
  98#define NETIF_F_GSO_ROBUST      __NETIF_F(GSO_ROBUST)
  99#define NETIF_F_HIGHDMA         __NETIF_F(HIGHDMA)
 100#define NETIF_F_HW_CSUM         __NETIF_F(HW_CSUM)
 101#define NETIF_F_HW_VLAN_CTAG_FILTER __NETIF_F(HW_VLAN_CTAG_FILTER)
 102#define NETIF_F_HW_VLAN_CTAG_RX __NETIF_F(HW_VLAN_CTAG_RX)
 103#define NETIF_F_HW_VLAN_CTAG_TX __NETIF_F(HW_VLAN_CTAG_TX)
 104#define NETIF_F_IP_CSUM         __NETIF_F(IP_CSUM)
 105#define NETIF_F_IPV6_CSUM       __NETIF_F(IPV6_CSUM)
 106#define NETIF_F_LLTX            __NETIF_F(LLTX)
 107#define NETIF_F_LOOPBACK        __NETIF_F(LOOPBACK)
 108#define NETIF_F_LRO             __NETIF_F(LRO)
 109#define NETIF_F_NETNS_LOCAL     __NETIF_F(NETNS_LOCAL)
 110#define NETIF_F_NOCACHE_COPY    __NETIF_F(NOCACHE_COPY)
 111#define NETIF_F_NTUPLE          __NETIF_F(NTUPLE)
 112#define NETIF_F_RXCSUM          __NETIF_F(RXCSUM)
 113#define NETIF_F_RXHASH          __NETIF_F(RXHASH)
 114#define NETIF_F_SCTP_CRC        __NETIF_F(SCTP_CRC)
 115#define NETIF_F_SG              __NETIF_F(SG)
 116#define NETIF_F_TSO6            __NETIF_F(TSO6)
 117#define NETIF_F_TSO_ECN         __NETIF_F(TSO_ECN)
 118#define NETIF_F_TSO             __NETIF_F(TSO)
 119#define NETIF_F_UFO             __NETIF_F(UFO)
 120#define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
 121#define NETIF_F_RXFCS           __NETIF_F(RXFCS)
 122#define NETIF_F_RXALL           __NETIF_F(RXALL)
 123#define NETIF_F_GSO_GRE         __NETIF_F(GSO_GRE)
 124#define NETIF_F_GSO_GRE_CSUM    __NETIF_F(GSO_GRE_CSUM)
 125#define NETIF_F_GSO_IPXIP4      __NETIF_F(GSO_IPXIP4)
 126#define NETIF_F_GSO_IPXIP6      __NETIF_F(GSO_IPXIP6)
 127#define NETIF_F_GSO_UDP_TUNNEL  __NETIF_F(GSO_UDP_TUNNEL)
 128#define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM)
 129#define NETIF_F_TSO_MANGLEID    __NETIF_F(TSO_MANGLEID)
 130#define NETIF_F_GSO_PARTIAL      __NETIF_F(GSO_PARTIAL)
 131#define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM)
 132#define NETIF_F_GSO_SCTP        __NETIF_F(GSO_SCTP)
 133#define NETIF_F_HW_VLAN_STAG_FILTER __NETIF_F(HW_VLAN_STAG_FILTER)
 134#define NETIF_F_HW_VLAN_STAG_RX __NETIF_F(HW_VLAN_STAG_RX)
 135#define NETIF_F_HW_VLAN_STAG_TX __NETIF_F(HW_VLAN_STAG_TX)
 136#define NETIF_F_HW_L2FW_DOFFLOAD        __NETIF_F(HW_L2FW_DOFFLOAD)
 137#define NETIF_F_BUSY_POLL       __NETIF_F(BUSY_POLL)
 138#define NETIF_F_HW_TC           __NETIF_F(HW_TC)
 139
 140#define for_each_netdev_feature(mask_addr, bit) \
 141        for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)
 142
 143/* Features valid for ethtool to change */
 144/* = all defined minus driver/device-class-related */
 145#define NETIF_F_NEVER_CHANGE    (NETIF_F_VLAN_CHALLENGED | \
 146                                 NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
 147
 148/* remember that ((t)1 << t_BITS) is undefined in C99 */
 149#define NETIF_F_ETHTOOL_BITS    ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
 150                (__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
 151                ~NETIF_F_NEVER_CHANGE)
 152
 153/* Segmentation offload feature mask */
 154#define NETIF_F_GSO_MASK        (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
 155                __NETIF_F_BIT(NETIF_F_GSO_SHIFT))
 156
 157/* List of IP checksum features. Note that NETIF_F_ HW_CSUM should not be
 158 * set in features when NETIF_F_IP_CSUM or NETIF_F_IPV6_CSUM are set--
 159 * this would be contradictory
 160 */
 161#define NETIF_F_CSUM_MASK       (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | \
 162                                 NETIF_F_HW_CSUM)
 163
 164#define NETIF_F_ALL_TSO         (NETIF_F_TSO | NETIF_F_TSO6 | \
 165                                 NETIF_F_TSO_ECN | NETIF_F_TSO_MANGLEID)
 166
 167#define NETIF_F_ALL_FCOE        (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
 168                                 NETIF_F_FSO)
 169
 170/* List of features with software fallbacks. */
 171#define NETIF_F_GSO_SOFTWARE    (NETIF_F_ALL_TSO | NETIF_F_UFO | \
 172                                 NETIF_F_GSO_SCTP)
 173
 174/*
 175 * If one device supports one of these features, then enable them
 176 * for all in netdev_increment_features.
 177 */
 178#define NETIF_F_ONE_FOR_ALL     (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
 179                                 NETIF_F_SG | NETIF_F_HIGHDMA |         \
 180                                 NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
 181
 182/*
 183 * If one device doesn't support one of these features, then disable it
 184 * for all in netdev_increment_features.
 185 */
 186#define NETIF_F_ALL_FOR_ALL     (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
 187
 188/*
 189 * If upper/master device has these features disabled, they must be disabled
 190 * on all lower/slave devices as well.
 191 */
 192#define NETIF_F_UPPER_DISABLES  NETIF_F_LRO
 193
 194/* changeable features with no special hardware requirements */
 195#define NETIF_F_SOFT_FEATURES   (NETIF_F_GSO | NETIF_F_GRO)
 196
 197#define NETIF_F_VLAN_FEATURES   (NETIF_F_HW_VLAN_CTAG_FILTER | \
 198                                 NETIF_F_HW_VLAN_CTAG_RX | \
 199                                 NETIF_F_HW_VLAN_CTAG_TX | \
 200                                 NETIF_F_HW_VLAN_STAG_FILTER | \
 201                                 NETIF_F_HW_VLAN_STAG_RX | \
 202                                 NETIF_F_HW_VLAN_STAG_TX)
 203
 204#define NETIF_F_GSO_ENCAP_ALL   (NETIF_F_GSO_GRE |                      \
 205                                 NETIF_F_GSO_GRE_CSUM |                 \
 206                                 NETIF_F_GSO_IPXIP4 |                   \
 207                                 NETIF_F_GSO_IPXIP6 |                   \
 208                                 NETIF_F_GSO_UDP_TUNNEL |               \
 209                                 NETIF_F_GSO_UDP_TUNNEL_CSUM)
 210
 211#endif  /* _LINUX_NETDEV_FEATURES_H */
 212