include/linux/netdev_features.h

   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
  15 typedef u64 netdev_features_t;
  16
  17 enum {
  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
  58         /*
  59          * Add your fresh new feature above and remember to update
  60          * netdev_features_strings[] in net/core/ethtool.c and maybe
  61          * some feature mask #defines below. Please also describe it
  62          * in Documentation/networking/netdev-features.txt.
  63          */
  64
  65         /**/NETDEV_FEATURE_COUNT
  66 };
  67
  68 /* copy'n'paste compression ;) */
  69 #define __NETIF_F_BIT(bit)      ((netdev_features_t)1 << (bit))
  70 #define __NETIF_F(name)         __NETIF_F_BIT(NETIF_F_##name##_BIT)
  71
  72 #define NETIF_F_FCOE_CRC        __NETIF_F(FCOE_CRC)
  73 #define NETIF_F_FCOE_MTU        __NETIF_F(FCOE_MTU)
  74 #define NETIF_F_FRAGLIST        __NETIF_F(FRAGLIST)
  75 #define NETIF_F_FSO             __NETIF_F(FSO)
  76 #define NETIF_F_GRO             __NETIF_F(GRO)
  77 #define NETIF_F_GSO             __NETIF_F(GSO)
  78 #define NETIF_F_GSO_ROBUST      __NETIF_F(GSO_ROBUST)
  79 #define NETIF_F_HIGHDMA         __NETIF_F(HIGHDMA)
  80 #define NETIF_F_HW_CSUM         __NETIF_F(HW_CSUM)
  81 #define NETIF_F_HW_VLAN_FILTER  __NETIF_F(HW_VLAN_FILTER)
  82 #define NETIF_F_HW_VLAN_RX      __NETIF_F(HW_VLAN_RX)
  83 #define NETIF_F_HW_VLAN_TX      __NETIF_F(HW_VLAN_TX)
  84 #define NETIF_F_IP_CSUM         __NETIF_F(IP_CSUM)
  85 #define NETIF_F_IPV6_CSUM       __NETIF_F(IPV6_CSUM)
  86 #define NETIF_F_LLTX            __NETIF_F(LLTX)
  87 #define NETIF_F_LOOPBACK        __NETIF_F(LOOPBACK)
  88 #define NETIF_F_LRO             __NETIF_F(LRO)
  89 #define NETIF_F_NETNS_LOCAL     __NETIF_F(NETNS_LOCAL)
  90 #define NETIF_F_NOCACHE_COPY    __NETIF_F(NOCACHE_COPY)
  91 #define NETIF_F_NTUPLE          __NETIF_F(NTUPLE)
  92 #define NETIF_F_RXCSUM          __NETIF_F(RXCSUM)
  93 #define NETIF_F_RXHASH          __NETIF_F(RXHASH)
  94 #define NETIF_F_SCTP_CSUM       __NETIF_F(SCTP_CSUM)
  95 #define NETIF_F_SG              __NETIF_F(SG)
  96 #define NETIF_F_TSO6            __NETIF_F(TSO6)
  97 #define NETIF_F_TSO_ECN         __NETIF_F(TSO_ECN)
  98 #define NETIF_F_TSO             __NETIF_F(TSO)
  99 #define NETIF_F_UFO             __NETIF_F(UFO)
 100 #define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
 101
 102 /* Features valid for ethtool to change */
 103 /* = all defined minus driver/device-class-related */
 104 #define NETIF_F_NEVER_CHANGE    (NETIF_F_VLAN_CHALLENGED | \
 105                                  NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
 106
 107 /* remember that ((t)1 << t_BITS) is undefined in C99 */
 108 #define NETIF_F_ETHTOOL_BITS    ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
 109                 (__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
 110                 ~NETIF_F_NEVER_CHANGE)
 111
 112 /* Segmentation offload feature mask */
 113 #define NETIF_F_GSO_MASK        (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
 114                 __NETIF_F_BIT(NETIF_F_GSO_SHIFT))
 115
 116 /* List of features with software fallbacks. */
 117 #define NETIF_F_GSO_SOFTWARE    (NETIF_F_TSO | NETIF_F_TSO_ECN | \
 118                                  NETIF_F_TSO6 | NETIF_F_UFO)
 119
 120 #define NETIF_F_GEN_CSUM        NETIF_F_HW_CSUM
 121 #define NETIF_F_V4_CSUM         (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
 122 #define NETIF_F_V6_CSUM         (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
 123 #define NETIF_F_ALL_CSUM        (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
 124
 125 #define NETIF_F_ALL_TSO         (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
 126
 127 #define NETIF_F_ALL_FCOE        (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
 128                                  NETIF_F_FSO)
 129
 130 /*
 131  * If one device supports one of these features, then enable them
 132  * for all in netdev_increment_features.
 133  */
 134 #define NETIF_F_ONE_FOR_ALL     (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
 135                                  NETIF_F_SG | NETIF_F_HIGHDMA |         \
 136                                  NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
 137 /*
 138  * If one device doesn't support one of these features, then disable it
 139  * for all in netdev_increment_features.
 140  */
 141 #define NETIF_F_ALL_FOR_ALL     (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
 142
 143 /* changeable features with no special hardware requirements */
 144 #define NETIF_F_SOFT_FEATURES   (NETIF_F_GSO | NETIF_F_GRO)
 145
 146 #endif  /* _LINUX_NETDEV_FEATURES_H */