root/include/linux/netdev_features.h

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INCLUDED FROM

DEFINITIONS

This source file includes following definitions.
  1. find_next_netdev_feature
   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Network device features.
   4  */
   5 #ifndef _LINUX_NETDEV_FEATURES_H
   6 #define _LINUX_NETDEV_FEATURES_H
   7 
   8 #include <linux/types.h>
   9 #include <linux/bitops.h>
  10 #include <asm/byteorder.h>
  11 
  12 typedef u64 netdev_features_t;
  13 
  14 enum {
  15         NETIF_F_SG_BIT,                 /* Scatter/gather IO. */
  16         NETIF_F_IP_CSUM_BIT,            /* Can checksum TCP/UDP over IPv4. */
  17         __UNUSED_NETIF_F_1,
  18         NETIF_F_HW_CSUM_BIT,            /* Can checksum all the packets. */
  19         NETIF_F_IPV6_CSUM_BIT,          /* Can checksum TCP/UDP over IPV6 */
  20         NETIF_F_HIGHDMA_BIT,            /* Can DMA to high memory. */
  21         NETIF_F_FRAGLIST_BIT,           /* Scatter/gather IO. */
  22         NETIF_F_HW_VLAN_CTAG_TX_BIT,    /* Transmit VLAN CTAG HW acceleration */
  23         NETIF_F_HW_VLAN_CTAG_RX_BIT,    /* Receive VLAN CTAG HW acceleration */
  24         NETIF_F_HW_VLAN_CTAG_FILTER_BIT,/* Receive filtering on VLAN CTAGs */
  25         NETIF_F_VLAN_CHALLENGED_BIT,    /* Device cannot handle VLAN packets */
  26         NETIF_F_GSO_BIT,                /* Enable software GSO. */
  27         NETIF_F_LLTX_BIT,               /* LockLess TX - deprecated. Please */
  28                                         /* do not use LLTX in new drivers */
  29         NETIF_F_NETNS_LOCAL_BIT,        /* Does not change network namespaces */
  30         NETIF_F_GRO_BIT,                /* Generic receive offload */
  31         NETIF_F_LRO_BIT,                /* large receive offload */
  32 
  33         /**/NETIF_F_GSO_SHIFT,          /* keep the order of SKB_GSO_* bits */
  34         NETIF_F_TSO_BIT                 /* ... TCPv4 segmentation */
  35                 = NETIF_F_GSO_SHIFT,
  36         NETIF_F_GSO_ROBUST_BIT,         /* ... ->SKB_GSO_DODGY */
  37         NETIF_F_TSO_ECN_BIT,            /* ... TCP ECN support */
  38         NETIF_F_TSO_MANGLEID_BIT,       /* ... IPV4 ID mangling allowed */
  39         NETIF_F_TSO6_BIT,               /* ... TCPv6 segmentation */
  40         NETIF_F_FSO_BIT,                /* ... FCoE segmentation */
  41         NETIF_F_GSO_GRE_BIT,            /* ... GRE with TSO */
  42         NETIF_F_GSO_GRE_CSUM_BIT,       /* ... GRE with csum with TSO */
  43         NETIF_F_GSO_IPXIP4_BIT,         /* ... IP4 or IP6 over IP4 with TSO */
  44         NETIF_F_GSO_IPXIP6_BIT,         /* ... IP4 or IP6 over IP6 with TSO */
  45         NETIF_F_GSO_UDP_TUNNEL_BIT,     /* ... UDP TUNNEL with TSO */
  46         NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
  47         NETIF_F_GSO_PARTIAL_BIT,        /* ... Only segment inner-most L4
  48                                          *     in hardware and all other
  49                                          *     headers in software.
  50                                          */
  51         NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */
  52         NETIF_F_GSO_SCTP_BIT,           /* ... SCTP fragmentation */
  53         NETIF_F_GSO_ESP_BIT,            /* ... ESP with TSO */
  54         NETIF_F_GSO_UDP_BIT,            /* ... UFO, deprecated except tuntap */
  55         NETIF_F_GSO_UDP_L4_BIT,         /* ... UDP payload GSO (not UFO) */
  56         /**/NETIF_F_GSO_LAST =          /* last bit, see GSO_MASK */
  57                 NETIF_F_GSO_UDP_L4_BIT,
  58 
  59         NETIF_F_FCOE_CRC_BIT,           /* FCoE CRC32 */
  60         NETIF_F_SCTP_CRC_BIT,           /* SCTP checksum offload */
  61         NETIF_F_FCOE_MTU_BIT,           /* Supports max FCoE MTU, 2158 bytes*/
  62         NETIF_F_NTUPLE_BIT,             /* N-tuple filters supported */
  63         NETIF_F_RXHASH_BIT,             /* Receive hashing offload */
  64         NETIF_F_RXCSUM_BIT,             /* Receive checksumming offload */
  65         NETIF_F_NOCACHE_COPY_BIT,       /* Use no-cache copyfromuser */
  66         NETIF_F_LOOPBACK_BIT,           /* Enable loopback */
  67         NETIF_F_RXFCS_BIT,              /* Append FCS to skb pkt data */
  68         NETIF_F_RXALL_BIT,              /* Receive errored frames too */
  69         NETIF_F_HW_VLAN_STAG_TX_BIT,    /* Transmit VLAN STAG HW acceleration */
  70         NETIF_F_HW_VLAN_STAG_RX_BIT,    /* Receive VLAN STAG HW acceleration */
  71         NETIF_F_HW_VLAN_STAG_FILTER_BIT,/* Receive filtering on VLAN STAGs */
  72         NETIF_F_HW_L2FW_DOFFLOAD_BIT,   /* Allow L2 Forwarding in Hardware */
  73 
  74         NETIF_F_HW_TC_BIT,              /* Offload TC infrastructure */
  75         NETIF_F_HW_ESP_BIT,             /* Hardware ESP transformation offload */
  76         NETIF_F_HW_ESP_TX_CSUM_BIT,     /* ESP with TX checksum offload */
  77         NETIF_F_RX_UDP_TUNNEL_PORT_BIT, /* Offload of RX port for UDP tunnels */
  78         NETIF_F_HW_TLS_TX_BIT,          /* Hardware TLS TX offload */
  79         NETIF_F_HW_TLS_RX_BIT,          /* Hardware TLS RX offload */
  80 
  81         NETIF_F_GRO_HW_BIT,             /* Hardware Generic receive offload */
  82         NETIF_F_HW_TLS_RECORD_BIT,      /* Offload TLS record */
  83 
  84         /*
  85          * Add your fresh new feature above and remember to update
  86          * netdev_features_strings[] in net/core/ethtool.c and maybe
  87          * some feature mask #defines below. Please also describe it
  88          * in Documentation/networking/netdev-features.txt.
  89          */
  90 
  91         /**/NETDEV_FEATURE_COUNT
  92 };
  93 
  94 /* copy'n'paste compression ;) */
  95 #define __NETIF_F_BIT(bit)      ((netdev_features_t)1 << (bit))
  96 #define __NETIF_F(name)         __NETIF_F_BIT(NETIF_F_##name##_BIT)
  97 
  98 #define NETIF_F_FCOE_CRC        __NETIF_F(FCOE_CRC)
  99 #define NETIF_F_FCOE_MTU        __NETIF_F(FCOE_MTU)
 100 #define NETIF_F_FRAGLIST        __NETIF_F(FRAGLIST)
 101 #define NETIF_F_FSO             __NETIF_F(FSO)
 102 #define NETIF_F_GRO             __NETIF_F(GRO)
 103 #define NETIF_F_GRO_HW          __NETIF_F(GRO_HW)
 104 #define NETIF_F_GSO             __NETIF_F(GSO)
 105 #define NETIF_F_GSO_ROBUST      __NETIF_F(GSO_ROBUST)
 106 #define NETIF_F_HIGHDMA         __NETIF_F(HIGHDMA)
 107 #define NETIF_F_HW_CSUM         __NETIF_F(HW_CSUM)
 108 #define NETIF_F_HW_VLAN_CTAG_FILTER __NETIF_F(HW_VLAN_CTAG_FILTER)
 109 #define NETIF_F_HW_VLAN_CTAG_RX __NETIF_F(HW_VLAN_CTAG_RX)
 110 #define NETIF_F_HW_VLAN_CTAG_TX __NETIF_F(HW_VLAN_CTAG_TX)
 111 #define NETIF_F_IP_CSUM         __NETIF_F(IP_CSUM)
 112 #define NETIF_F_IPV6_CSUM       __NETIF_F(IPV6_CSUM)
 113 #define NETIF_F_LLTX            __NETIF_F(LLTX)
 114 #define NETIF_F_LOOPBACK        __NETIF_F(LOOPBACK)
 115 #define NETIF_F_LRO             __NETIF_F(LRO)
 116 #define NETIF_F_NETNS_LOCAL     __NETIF_F(NETNS_LOCAL)
 117 #define NETIF_F_NOCACHE_COPY    __NETIF_F(NOCACHE_COPY)
 118 #define NETIF_F_NTUPLE          __NETIF_F(NTUPLE)
 119 #define NETIF_F_RXCSUM          __NETIF_F(RXCSUM)
 120 #define NETIF_F_RXHASH          __NETIF_F(RXHASH)
 121 #define NETIF_F_SCTP_CRC        __NETIF_F(SCTP_CRC)
 122 #define NETIF_F_SG              __NETIF_F(SG)
 123 #define NETIF_F_TSO6            __NETIF_F(TSO6)
 124 #define NETIF_F_TSO_ECN         __NETIF_F(TSO_ECN)
 125 #define NETIF_F_TSO             __NETIF_F(TSO)
 126 #define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
 127 #define NETIF_F_RXFCS           __NETIF_F(RXFCS)
 128 #define NETIF_F_RXALL           __NETIF_F(RXALL)
 129 #define NETIF_F_GSO_GRE         __NETIF_F(GSO_GRE)
 130 #define NETIF_F_GSO_GRE_CSUM    __NETIF_F(GSO_GRE_CSUM)
 131 #define NETIF_F_GSO_IPXIP4      __NETIF_F(GSO_IPXIP4)
 132 #define NETIF_F_GSO_IPXIP6      __NETIF_F(GSO_IPXIP6)
 133 #define NETIF_F_GSO_UDP_TUNNEL  __NETIF_F(GSO_UDP_TUNNEL)
 134 #define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM)
 135 #define NETIF_F_TSO_MANGLEID    __NETIF_F(TSO_MANGLEID)
 136 #define NETIF_F_GSO_PARTIAL      __NETIF_F(GSO_PARTIAL)
 137 #define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM)
 138 #define NETIF_F_GSO_SCTP        __NETIF_F(GSO_SCTP)
 139 #define NETIF_F_GSO_ESP         __NETIF_F(GSO_ESP)
 140 #define NETIF_F_GSO_UDP         __NETIF_F(GSO_UDP)
 141 #define NETIF_F_HW_VLAN_STAG_FILTER __NETIF_F(HW_VLAN_STAG_FILTER)
 142 #define NETIF_F_HW_VLAN_STAG_RX __NETIF_F(HW_VLAN_STAG_RX)
 143 #define NETIF_F_HW_VLAN_STAG_TX __NETIF_F(HW_VLAN_STAG_TX)
 144 #define NETIF_F_HW_L2FW_DOFFLOAD        __NETIF_F(HW_L2FW_DOFFLOAD)
 145 #define NETIF_F_HW_TC           __NETIF_F(HW_TC)
 146 #define NETIF_F_HW_ESP          __NETIF_F(HW_ESP)
 147 #define NETIF_F_HW_ESP_TX_CSUM  __NETIF_F(HW_ESP_TX_CSUM)
 148 #define NETIF_F_RX_UDP_TUNNEL_PORT  __NETIF_F(RX_UDP_TUNNEL_PORT)
 149 #define NETIF_F_HW_TLS_RECORD   __NETIF_F(HW_TLS_RECORD)
 150 #define NETIF_F_GSO_UDP_L4      __NETIF_F(GSO_UDP_L4)
 151 #define NETIF_F_HW_TLS_TX       __NETIF_F(HW_TLS_TX)
 152 #define NETIF_F_HW_TLS_RX       __NETIF_F(HW_TLS_RX)
 153 
 154 /* Finds the next feature with the highest number of the range of start till 0.
 155  */
 156 static inline int find_next_netdev_feature(u64 feature, unsigned long start)
 157 {
 158         /* like BITMAP_LAST_WORD_MASK() for u64
 159          * this sets the most significant 64 - start to 0.
 160          */
 161         feature &= ~0ULL >> (-start & ((sizeof(feature) * 8) - 1));
 162 
 163         return fls64(feature) - 1;
 164 }
 165 
 166 /* This goes for the MSB to the LSB through the set feature bits,
 167  * mask_addr should be a u64 and bit an int
 168  */
 169 #define for_each_netdev_feature(mask_addr, bit)                         \
 170         for ((bit) = find_next_netdev_feature((mask_addr),              \
 171                                               NETDEV_FEATURE_COUNT);    \
 172              (bit) >= 0;                                                \
 173              (bit) = find_next_netdev_feature((mask_addr), (bit) - 1))
 174 
 175 /* Features valid for ethtool to change */
 176 /* = all defined minus driver/device-class-related */
 177 #define NETIF_F_NEVER_CHANGE    (NETIF_F_VLAN_CHALLENGED | \
 178                                  NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
 179 
 180 /* remember that ((t)1 << t_BITS) is undefined in C99 */
 181 #define NETIF_F_ETHTOOL_BITS    ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
 182                 (__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
 183                 ~NETIF_F_NEVER_CHANGE)
 184 
 185 /* Segmentation offload feature mask */
 186 #define NETIF_F_GSO_MASK        (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
 187                 __NETIF_F_BIT(NETIF_F_GSO_SHIFT))
 188 
 189 /* List of IP checksum features. Note that NETIF_F_ HW_CSUM should not be
 190  * set in features when NETIF_F_IP_CSUM or NETIF_F_IPV6_CSUM are set--
 191  * this would be contradictory
 192  */
 193 #define NETIF_F_CSUM_MASK       (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | \
 194                                  NETIF_F_HW_CSUM)
 195 
 196 #define NETIF_F_ALL_TSO         (NETIF_F_TSO | NETIF_F_TSO6 | \
 197                                  NETIF_F_TSO_ECN | NETIF_F_TSO_MANGLEID)
 198 
 199 #define NETIF_F_ALL_FCOE        (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
 200                                  NETIF_F_FSO)
 201 
 202 /* List of features with software fallbacks. */
 203 #define NETIF_F_GSO_SOFTWARE    (NETIF_F_ALL_TSO | \
 204                                  NETIF_F_GSO_SCTP)
 205 
 206 /*
 207  * If one device supports one of these features, then enable them
 208  * for all in netdev_increment_features.
 209  */
 210 #define NETIF_F_ONE_FOR_ALL     (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
 211                                  NETIF_F_SG | NETIF_F_HIGHDMA |         \
 212                                  NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
 213 
 214 /*
 215  * If one device doesn't support one of these features, then disable it
 216  * for all in netdev_increment_features.
 217  */
 218 #define NETIF_F_ALL_FOR_ALL     (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
 219 
 220 /*
 221  * If upper/master device has these features disabled, they must be disabled
 222  * on all lower/slave devices as well.
 223  */
 224 #define NETIF_F_UPPER_DISABLES  NETIF_F_LRO
 225 
 226 /* changeable features with no special hardware requirements */
 227 #define NETIF_F_SOFT_FEATURES   (NETIF_F_GSO | NETIF_F_GRO)
 228 
 229 #define NETIF_F_VLAN_FEATURES   (NETIF_F_HW_VLAN_CTAG_FILTER | \
 230                                  NETIF_F_HW_VLAN_CTAG_RX | \
 231                                  NETIF_F_HW_VLAN_CTAG_TX | \
 232                                  NETIF_F_HW_VLAN_STAG_FILTER | \
 233                                  NETIF_F_HW_VLAN_STAG_RX | \
 234                                  NETIF_F_HW_VLAN_STAG_TX)
 235 
 236 #define NETIF_F_GSO_ENCAP_ALL   (NETIF_F_GSO_GRE |                      \
 237                                  NETIF_F_GSO_GRE_CSUM |                 \
 238                                  NETIF_F_GSO_IPXIP4 |                   \
 239                                  NETIF_F_GSO_IPXIP6 |                   \
 240                                  NETIF_F_GSO_UDP_TUNNEL |               \
 241                                  NETIF_F_GSO_UDP_TUNNEL_CSUM)
 242 
 243 #endif  /* _LINUX_NETDEV_FEATURES_H */
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