netdev_features.h

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/*
 * Network device features.
 *
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#ifndef _LINUX_NETDEV_FEATURES_H
#define _LINUX_NETDEV_FEATURES_H

#include <linux/types.h>

typedef u64 netdev_features_t;

enum {
    NETIF_F_SG_BIT,         /* Scatter/gather IO. */
    NETIF_F_IP_CSUM_BIT,        /* Can checksum TCP/UDP over IPv4. */
    __UNUSED_NETIF_F_1,
    NETIF_F_HW_CSUM_BIT,        /* Can checksum all the packets. */
    NETIF_F_IPV6_CSUM_BIT,      /* Can checksum TCP/UDP over IPV6 */
    NETIF_F_HIGHDMA_BIT,        /* Can DMA to high memory. */
    NETIF_F_FRAGLIST_BIT,       /* Scatter/gather IO. */
    NETIF_F_HW_VLAN_TX_BIT,     /* Transmit VLAN hw acceleration */
    NETIF_F_HW_VLAN_RX_BIT,     /* Receive VLAN hw acceleration */
    NETIF_F_HW_VLAN_FILTER_BIT, /* Receive filtering on VLAN */
    NETIF_F_VLAN_CHALLENGED_BIT,    /* Device cannot handle VLAN packets */
    NETIF_F_GSO_BIT,        /* Enable software GSO. */
    NETIF_F_LLTX_BIT,       /* LockLess TX - deprecated. Please */
                    /* do not use LLTX in new drivers */
    NETIF_F_NETNS_LOCAL_BIT,    /* Does not change network namespaces */
    NETIF_F_GRO_BIT,        /* Generic receive offload */
    NETIF_F_LRO_BIT,        /* large receive offload */

    NETIF_F_GSO_SHIFT,      /* keep the order of SKB_GSO_* bits */
    NETIF_F_TSO_BIT         /* ... TCPv4 segmentation */
        = NETIF_F_GSO_SHIFT,
    NETIF_F_UFO_BIT,        /* ... UDPv4 fragmentation */
    NETIF_F_GSO_ROBUST_BIT,     /* ... ->SKB_GSO_DODGY */
    NETIF_F_TSO_ECN_BIT,        /* ... TCP ECN support */
    NETIF_F_TSO6_BIT,       /* ... TCPv6 segmentation */
    NETIF_F_FSO_BIT,        /* ... FCoE segmentation */
    NETIF_F_GSO_RESERVED1,      /* ... free (fill GSO_MASK to 8 bits) */
    NETIF_F_GSO_LAST,       /* [can't be last bit, see GSO_MASK] */
    NETIF_F_GSO_RESERVED2       /* ... free (fill GSO_MASK to 8 bits) */
        = NETIF_F_GSO_LAST,

    NETIF_F_FCOE_CRC_BIT,       /* FCoE CRC32 */
    NETIF_F_SCTP_CSUM_BIT,      /* SCTP checksum offload */
    NETIF_F_FCOE_MTU_BIT,       /* Supports max FCoE MTU, 2158 bytes*/
    NETIF_F_NTUPLE_BIT,     /* N-tuple filters supported */
    NETIF_F_RXHASH_BIT,     /* Receive hashing offload */
    NETIF_F_RXCSUM_BIT,     /* Receive checksumming offload */
    NETIF_F_NOCACHE_COPY_BIT,   /* Use no-cache copyfromuser */
    NETIF_F_LOOPBACK_BIT,       /* Enable loopback */
    NETIF_F_RXFCS_BIT,      /* Append FCS to skb pkt data */
    NETIF_F_RXALL_BIT,      /* Receive errored frames too */

    /*
     * Add your fresh new feature above and remember to update
     * netdev_features_strings[] in net/core/ethtool.c and maybe
     * some feature mask #defines below. Please also describe it
     * in Documentation/networking/netdev-features.txt.
     */

    NETDEV_FEATURE_COUNT
};

/* copy'n'paste compression ;) */
#define __NETIF_F_BIT(bit)  ((netdev_features_t)1 << (bit))
#define __NETIF_F(name)     __NETIF_F_BIT(NETIF_F_##name##_BIT)

#define NETIF_F_FCOE_CRC    __NETIF_F(FCOE_CRC)
#define NETIF_F_FCOE_MTU    __NETIF_F(FCOE_MTU)
#define NETIF_F_FRAGLIST    __NETIF_F(FRAGLIST)
#define NETIF_F_FSO     __NETIF_F(FSO)
#define NETIF_F_GRO     __NETIF_F(GRO)
#define NETIF_F_GSO     __NETIF_F(GSO)
#define NETIF_F_GSO_ROBUST  __NETIF_F(GSO_ROBUST)
#define NETIF_F_HIGHDMA     __NETIF_F(HIGHDMA)
#define NETIF_F_HW_CSUM     __NETIF_F(HW_CSUM)
#define NETIF_F_HW_VLAN_FILTER  __NETIF_F(HW_VLAN_FILTER)
#define NETIF_F_HW_VLAN_RX  __NETIF_F(HW_VLAN_RX)
#define NETIF_F_HW_VLAN_TX  __NETIF_F(HW_VLAN_TX)
#define NETIF_F_IP_CSUM     __NETIF_F(IP_CSUM)
#define NETIF_F_IPV6_CSUM   __NETIF_F(IPV6_CSUM)
#define NETIF_F_LLTX        __NETIF_F(LLTX)
#define NETIF_F_LOOPBACK    __NETIF_F(LOOPBACK)
#define NETIF_F_LRO     __NETIF_F(LRO)
#define NETIF_F_NETNS_LOCAL __NETIF_F(NETNS_LOCAL)
#define NETIF_F_NOCACHE_COPY    __NETIF_F(NOCACHE_COPY)
#define NETIF_F_NTUPLE      __NETIF_F(NTUPLE)
#define NETIF_F_RXCSUM      __NETIF_F(RXCSUM)
#define NETIF_F_RXHASH      __NETIF_F(RXHASH)
#define NETIF_F_SCTP_CSUM   __NETIF_F(SCTP_CSUM)
#define NETIF_F_SG      __NETIF_F(SG)
#define NETIF_F_TSO6        __NETIF_F(TSO6)
#define NETIF_F_TSO_ECN     __NETIF_F(TSO_ECN)
#define NETIF_F_TSO     __NETIF_F(TSO)
#define NETIF_F_UFO     __NETIF_F(UFO)
#define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
#define NETIF_F_RXFCS       __NETIF_F(RXFCS)
#define NETIF_F_RXALL       __NETIF_F(RXALL)

/* Features valid for ethtool to change */
/* = all defined minus driver/device-class-related */
#define NETIF_F_NEVER_CHANGE    (NETIF_F_VLAN_CHALLENGED | \
                 NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)

/* remember that ((t)1 << t_BITS) is undefined in C99 */
#define NETIF_F_ETHTOOL_BITS    ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
        (__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
        ~NETIF_F_NEVER_CHANGE)

/* Segmentation offload feature mask */
#define NETIF_F_GSO_MASK    (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
        __NETIF_F_BIT(NETIF_F_GSO_SHIFT))

/* List of features with software fallbacks. */
#define NETIF_F_GSO_SOFTWARE    (NETIF_F_TSO | NETIF_F_TSO_ECN | \
                 NETIF_F_TSO6 | NETIF_F_UFO)

#define NETIF_F_GEN_CSUM    NETIF_F_HW_CSUM
#define NETIF_F_V4_CSUM     (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
#define NETIF_F_V6_CSUM     (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
#define NETIF_F_ALL_CSUM    (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)

#define NETIF_F_ALL_TSO     (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)

#define NETIF_F_ALL_FCOE    (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
                 NETIF_F_FSO)

/*
 * If one device supports one of these features, then enable them
 * for all in netdev_increment_features.
 */
#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
                 NETIF_F_SG | NETIF_F_HIGHDMA |     \
                 NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
/*
 * If one device doesn't support one of these features, then disable it
 * for all in netdev_increment_features.
 */
#define NETIF_F_ALL_FOR_ALL (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)

/* changeable features with no special hardware requirements */
#define NETIF_F_SOFT_FEATURES   (NETIF_F_GSO | NETIF_F_GRO)

#endif  /* _LINUX_NETDEV_FEATURES_H */