net: Define enum for net device features.
Define feature values by bit position instead of direct 2**i values and force the values to be of type netdev_features_t. Cleaned and extended from patch by Mahesh Bandewar <maheshb@google.com>: + added netdev_features_t casts + included bits under NETIF_F_GSO_MASK + moved feature #defines out of struct net_device definition Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michał Mirosław
David S. Miller
parent
c8f44affb7
commit
a19f2a6df2
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@ -14,52 +14,105 @@
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typedef u32 netdev_features_t;
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/* Net device feature bits; if you change something,
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* also update netdev_features_strings[] in ethtool.c */
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#define NETIF_F_SG 1 /* Scatter/gather IO. */
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#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
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#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
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#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
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#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
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#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
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#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
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#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
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#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
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#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
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#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
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#define NETIF_F_GSO 2048 /* Enable software GSO. */
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#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
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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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NETIF_F_NO_CSUM_BIT, /* Does not require checksum. F.e. loopack. */
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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_TX_BIT, /* Transmit VLAN hw acceleration */
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NETIF_F_HW_VLAN_RX_BIT, /* Receive VLAN hw acceleration */
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NETIF_F_HW_VLAN_FILTER_BIT, /* Receive filtering on VLAN */
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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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#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
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#define NETIF_F_GRO 16384 /* Generic receive offload */
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#define NETIF_F_LRO 32768 /* large receive offload */
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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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/* the GSO_MASK reserves bits 16 through 23 */
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#define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
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#define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
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#define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
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#define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
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#define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
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#define NETIF_F_RXCSUM (1 << 29) /* Receive checksumming offload */
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#define NETIF_F_NOCACHE_COPY (1 << 30) /* Use no-cache copyfromuser */
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#define NETIF_F_LOOPBACK (1 << 31) /* Enable loopback */
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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_TSO6_BIT, /* ... TCPv6 segmentation */
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NETIF_F_FSO_BIT, /* ... FCoE segmentation */
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NETIF_F_GSO_RESERVED1, /* ... free (fill GSO_MASK to 8 bits) */
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/**/NETIF_F_GSO_LAST, /* [can't be last bit, see GSO_MASK] */
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NETIF_F_GSO_RESERVED2 /* ... free (fill GSO_MASK to 8 bits) */
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= NETIF_F_GSO_LAST,
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/* Segmentation offload features */
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#define NETIF_F_GSO_SHIFT 16
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#define NETIF_F_GSO_MASK 0x00ff0000
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#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
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#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
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#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
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#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
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#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
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#define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
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NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
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NETIF_F_SCTP_CSUM_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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/*
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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_FILTER __NETIF_F(HW_VLAN_FILTER)
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#define NETIF_F_HW_VLAN_RX __NETIF_F(HW_VLAN_RX)
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#define NETIF_F_HW_VLAN_TX __NETIF_F(HW_VLAN_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_NO_CSUM __NETIF_F(NO_CSUM)
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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_CSUM __NETIF_F(SCTP_CSUM)
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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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/* 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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#define NETIF_F_ETHTOOL_BITS (0xff3fffff & ~NETIF_F_NEVER_CHANGE)
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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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