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802ab55adc
This patch adds support for something I am referring to as GSO partial. The basic idea is that we can support a broader range of devices for segmentation if we use fixed outer headers and have the hardware only really deal with segmenting the inner header. The idea behind the naming is due to the fact that everything before csum_start will be fixed headers, and everything after will be the region that is handled by hardware. With the current implementation it allows us to add support for the following GSO types with an inner TSO_MANGLEID or TSO6 offload: NETIF_F_GSO_GRE NETIF_F_GSO_GRE_CSUM NETIF_F_GSO_IPIP NETIF_F_GSO_SIT NETIF_F_UDP_TUNNEL NETIF_F_UDP_TUNNEL_CSUM In the case of hardware that already supports tunneling we may be able to extend this further to support TSO_TCPV4 without TSO_MANGLEID if the hardware can support updating inner IPv4 headers. Signed-off-by: Alexander Duyck <aduyck@mirantis.com> Signed-off-by: David S. Miller <davem@davemloft.net>
209 lines
8.3 KiB
C
209 lines
8.3 KiB
C
/*
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* Network device features.
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_NETDEV_FEATURES_H
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#define _LINUX_NETDEV_FEATURES_H
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#include <linux/types.h>
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typedef u64 netdev_features_t;
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enum {
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NETIF_F_SG_BIT, /* Scatter/gather IO. */
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NETIF_F_IP_CSUM_BIT, /* Can checksum TCP/UDP over IPv4. */
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__UNUSED_NETIF_F_1,
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NETIF_F_HW_CSUM_BIT, /* Can checksum all the packets. */
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NETIF_F_IPV6_CSUM_BIT, /* Can checksum TCP/UDP over IPV6 */
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NETIF_F_HIGHDMA_BIT, /* Can DMA to high memory. */
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NETIF_F_FRAGLIST_BIT, /* Scatter/gather IO. */
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NETIF_F_HW_VLAN_CTAG_TX_BIT, /* Transmit VLAN CTAG HW acceleration */
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NETIF_F_HW_VLAN_CTAG_RX_BIT, /* Receive VLAN CTAG HW acceleration */
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NETIF_F_HW_VLAN_CTAG_FILTER_BIT,/* Receive filtering on VLAN CTAGs */
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NETIF_F_VLAN_CHALLENGED_BIT, /* Device cannot handle VLAN packets */
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NETIF_F_GSO_BIT, /* Enable software GSO. */
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NETIF_F_LLTX_BIT, /* LockLess TX - deprecated. Please */
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/* do not use LLTX in new drivers */
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NETIF_F_NETNS_LOCAL_BIT, /* Does not change network namespaces */
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NETIF_F_GRO_BIT, /* Generic receive offload */
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NETIF_F_LRO_BIT, /* large receive offload */
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/**/NETIF_F_GSO_SHIFT, /* keep the order of SKB_GSO_* bits */
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NETIF_F_TSO_BIT /* ... TCPv4 segmentation */
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= NETIF_F_GSO_SHIFT,
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NETIF_F_UFO_BIT, /* ... UDPv4 fragmentation */
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NETIF_F_GSO_ROBUST_BIT, /* ... ->SKB_GSO_DODGY */
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NETIF_F_TSO_ECN_BIT, /* ... TCP ECN support */
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NETIF_F_TSO_MANGLEID_BIT, /* ... IPV4 ID mangling allowed */
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NETIF_F_TSO6_BIT, /* ... TCPv6 segmentation */
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NETIF_F_FSO_BIT, /* ... FCoE segmentation */
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NETIF_F_GSO_GRE_BIT, /* ... GRE with TSO */
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NETIF_F_GSO_GRE_CSUM_BIT, /* ... GRE with csum with TSO */
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NETIF_F_GSO_IPIP_BIT, /* ... IPIP tunnel with TSO */
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NETIF_F_GSO_SIT_BIT, /* ... SIT tunnel with TSO */
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NETIF_F_GSO_UDP_TUNNEL_BIT, /* ... UDP TUNNEL with TSO */
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NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
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NETIF_F_GSO_PARTIAL_BIT, /* ... Only segment inner-most L4
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* in hardware and all other
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* headers in software.
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*/
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NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */
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/**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */
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NETIF_F_GSO_TUNNEL_REMCSUM_BIT,
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NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
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NETIF_F_SCTP_CRC_BIT, /* SCTP checksum offload */
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NETIF_F_FCOE_MTU_BIT, /* Supports max FCoE MTU, 2158 bytes*/
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NETIF_F_NTUPLE_BIT, /* N-tuple filters supported */
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NETIF_F_RXHASH_BIT, /* Receive hashing offload */
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NETIF_F_RXCSUM_BIT, /* Receive checksumming offload */
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NETIF_F_NOCACHE_COPY_BIT, /* Use no-cache copyfromuser */
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NETIF_F_LOOPBACK_BIT, /* Enable loopback */
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NETIF_F_RXFCS_BIT, /* Append FCS to skb pkt data */
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NETIF_F_RXALL_BIT, /* Receive errored frames too */
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NETIF_F_HW_VLAN_STAG_TX_BIT, /* Transmit VLAN STAG HW acceleration */
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NETIF_F_HW_VLAN_STAG_RX_BIT, /* Receive VLAN STAG HW acceleration */
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NETIF_F_HW_VLAN_STAG_FILTER_BIT,/* Receive filtering on VLAN STAGs */
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NETIF_F_HW_L2FW_DOFFLOAD_BIT, /* Allow L2 Forwarding in Hardware */
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NETIF_F_BUSY_POLL_BIT, /* Busy poll */
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NETIF_F_HW_TC_BIT, /* Offload TC infrastructure */
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/*
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* Add your fresh new feature above and remember to update
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* netdev_features_strings[] in net/core/ethtool.c and maybe
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* some feature mask #defines below. Please also describe it
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* in Documentation/networking/netdev-features.txt.
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*/
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/**/NETDEV_FEATURE_COUNT
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};
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/* copy'n'paste compression ;) */
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#define __NETIF_F_BIT(bit) ((netdev_features_t)1 << (bit))
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#define __NETIF_F(name) __NETIF_F_BIT(NETIF_F_##name##_BIT)
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#define NETIF_F_FCOE_CRC __NETIF_F(FCOE_CRC)
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#define NETIF_F_FCOE_MTU __NETIF_F(FCOE_MTU)
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#define NETIF_F_FRAGLIST __NETIF_F(FRAGLIST)
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#define NETIF_F_FSO __NETIF_F(FSO)
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#define NETIF_F_GRO __NETIF_F(GRO)
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#define NETIF_F_GSO __NETIF_F(GSO)
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#define NETIF_F_GSO_ROBUST __NETIF_F(GSO_ROBUST)
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#define NETIF_F_HIGHDMA __NETIF_F(HIGHDMA)
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#define NETIF_F_HW_CSUM __NETIF_F(HW_CSUM)
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#define NETIF_F_HW_VLAN_CTAG_FILTER __NETIF_F(HW_VLAN_CTAG_FILTER)
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#define NETIF_F_HW_VLAN_CTAG_RX __NETIF_F(HW_VLAN_CTAG_RX)
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#define NETIF_F_HW_VLAN_CTAG_TX __NETIF_F(HW_VLAN_CTAG_TX)
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#define NETIF_F_IP_CSUM __NETIF_F(IP_CSUM)
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#define NETIF_F_IPV6_CSUM __NETIF_F(IPV6_CSUM)
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#define NETIF_F_LLTX __NETIF_F(LLTX)
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#define NETIF_F_LOOPBACK __NETIF_F(LOOPBACK)
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#define NETIF_F_LRO __NETIF_F(LRO)
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#define NETIF_F_NETNS_LOCAL __NETIF_F(NETNS_LOCAL)
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#define NETIF_F_NOCACHE_COPY __NETIF_F(NOCACHE_COPY)
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#define NETIF_F_NTUPLE __NETIF_F(NTUPLE)
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#define NETIF_F_RXCSUM __NETIF_F(RXCSUM)
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#define NETIF_F_RXHASH __NETIF_F(RXHASH)
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#define NETIF_F_SCTP_CRC __NETIF_F(SCTP_CRC)
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#define NETIF_F_SG __NETIF_F(SG)
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#define NETIF_F_TSO6 __NETIF_F(TSO6)
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#define NETIF_F_TSO_ECN __NETIF_F(TSO_ECN)
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#define NETIF_F_TSO __NETIF_F(TSO)
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#define NETIF_F_UFO __NETIF_F(UFO)
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#define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
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#define NETIF_F_RXFCS __NETIF_F(RXFCS)
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#define NETIF_F_RXALL __NETIF_F(RXALL)
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#define NETIF_F_GSO_GRE __NETIF_F(GSO_GRE)
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#define NETIF_F_GSO_GRE_CSUM __NETIF_F(GSO_GRE_CSUM)
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#define NETIF_F_GSO_IPIP __NETIF_F(GSO_IPIP)
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#define NETIF_F_GSO_SIT __NETIF_F(GSO_SIT)
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#define NETIF_F_GSO_UDP_TUNNEL __NETIF_F(GSO_UDP_TUNNEL)
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#define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM)
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#define NETIF_F_TSO_MANGLEID __NETIF_F(TSO_MANGLEID)
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#define NETIF_F_GSO_PARTIAL __NETIF_F(GSO_PARTIAL)
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#define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM)
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#define NETIF_F_HW_VLAN_STAG_FILTER __NETIF_F(HW_VLAN_STAG_FILTER)
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#define NETIF_F_HW_VLAN_STAG_RX __NETIF_F(HW_VLAN_STAG_RX)
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#define NETIF_F_HW_VLAN_STAG_TX __NETIF_F(HW_VLAN_STAG_TX)
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#define NETIF_F_HW_L2FW_DOFFLOAD __NETIF_F(HW_L2FW_DOFFLOAD)
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#define NETIF_F_BUSY_POLL __NETIF_F(BUSY_POLL)
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#define NETIF_F_HW_TC __NETIF_F(HW_TC)
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#define for_each_netdev_feature(mask_addr, bit) \
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for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)
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/* Features valid for ethtool to change */
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/* = all defined minus driver/device-class-related */
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#define NETIF_F_NEVER_CHANGE (NETIF_F_VLAN_CHALLENGED | \
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NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
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/* remember that ((t)1 << t_BITS) is undefined in C99 */
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#define NETIF_F_ETHTOOL_BITS ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
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(__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
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~NETIF_F_NEVER_CHANGE)
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/* Segmentation offload feature mask */
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#define NETIF_F_GSO_MASK (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
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__NETIF_F_BIT(NETIF_F_GSO_SHIFT))
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/* List of features with software fallbacks. */
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#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
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NETIF_F_TSO_MANGLEID | \
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NETIF_F_TSO6 | NETIF_F_UFO)
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/* List of IP checksum features. Note that NETIF_F_ HW_CSUM should not be
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* set in features when NETIF_F_IP_CSUM or NETIF_F_IPV6_CSUM are set--
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* this would be contradictory
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*/
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#define NETIF_F_CSUM_MASK (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | \
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NETIF_F_HW_CSUM)
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#define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
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#define NETIF_F_ALL_FCOE (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
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NETIF_F_FSO)
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/*
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* If one device supports one of these features, then enable them
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* for all in netdev_increment_features.
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*/
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#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
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NETIF_F_SG | NETIF_F_HIGHDMA | \
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NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
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/*
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* If one device doesn't support one of these features, then disable it
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* for all in netdev_increment_features.
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*/
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#define NETIF_F_ALL_FOR_ALL (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
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/*
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* If upper/master device has these features disabled, they must be disabled
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* on all lower/slave devices as well.
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*/
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#define NETIF_F_UPPER_DISABLES NETIF_F_LRO
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/* changeable features with no special hardware requirements */
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#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
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#define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \
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NETIF_F_HW_VLAN_CTAG_RX | \
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NETIF_F_HW_VLAN_CTAG_TX | \
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NETIF_F_HW_VLAN_STAG_FILTER | \
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NETIF_F_HW_VLAN_STAG_RX | \
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NETIF_F_HW_VLAN_STAG_TX)
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#define NETIF_F_GSO_ENCAP_ALL (NETIF_F_GSO_GRE | \
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NETIF_F_GSO_GRE_CSUM | \
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NETIF_F_GSO_IPIP | \
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NETIF_F_GSO_SIT | \
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NETIF_F_GSO_UDP_TUNNEL | \
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NETIF_F_GSO_UDP_TUNNEL_CSUM)
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#endif /* _LINUX_NETDEV_FEATURES_H */
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