Commit d7e6ed97 authored by Kittipon Meesompop's avatar Kittipon Meesompop Committed by David S. Miller

s390/qeth: add IPv6 RX checksum offload support

Check if a qeth device supports IPv6 RX checksum offload, and hook it up
into the existing NETIF_F_RXCSUM support.
As NETIF_F_RXCSUM is now backed by a combination of HW Assists, we need
to be a little smarter when dealing with errors during a configuration
change:
- switching on NETIF_F_RXCSUM only makes sense if at least one HW Assist
  was enabled successfully.
- for switching off NETIF_F_RXCSUM, all available HW Assists need to be
  deactivated.
Signed-off-by: default avatarKittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: default avatarJulian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 571f9dd8
...@@ -6430,6 +6430,29 @@ static int qeth_set_ipa_tso(struct qeth_card *card, int on) ...@@ -6430,6 +6430,29 @@ static int qeth_set_ipa_tso(struct qeth_card *card, int on)
return rc; return rc;
} }
static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
{
int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
int rc_ipv6;
if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
QETH_PROT_IPV4);
if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
/* no/one Offload Assist available, so the rc is trivial */
return rc_ipv4;
rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
QETH_PROT_IPV6);
if (on)
/* enable: success if any Assist is active */
return (rc_ipv6) ? rc_ipv4 : 0;
/* disable: failure if any Assist is still active */
return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
}
#define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \ #define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \
NETIF_F_IPV6_CSUM) NETIF_F_IPV6_CSUM)
/** /**
...@@ -6477,9 +6500,8 @@ int qeth_set_features(struct net_device *dev, netdev_features_t features) ...@@ -6477,9 +6500,8 @@ int qeth_set_features(struct net_device *dev, netdev_features_t features)
if (rc) if (rc)
changed ^= NETIF_F_IPV6_CSUM; changed ^= NETIF_F_IPV6_CSUM;
} }
if ((changed & NETIF_F_RXCSUM)) { if (changed & NETIF_F_RXCSUM) {
rc = qeth_set_ipa_csum(card, features & NETIF_F_RXCSUM, rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
IPA_INBOUND_CHECKSUM, QETH_PROT_IPV4);
if (rc) if (rc)
changed ^= NETIF_F_RXCSUM; changed ^= NETIF_F_RXCSUM;
} }
...@@ -6508,7 +6530,8 @@ netdev_features_t qeth_fix_features(struct net_device *dev, ...@@ -6508,7 +6530,8 @@ netdev_features_t qeth_fix_features(struct net_device *dev,
features &= ~NETIF_F_IP_CSUM; features &= ~NETIF_F_IP_CSUM;
if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
features &= ~NETIF_F_IPV6_CSUM; features &= ~NETIF_F_IPV6_CSUM;
if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
features &= ~NETIF_F_RXCSUM; features &= ~NETIF_F_RXCSUM;
if (!qeth_is_supported(card, IPA_OUTBOUND_TSO)) if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
features &= ~NETIF_F_TSO; features &= ~NETIF_F_TSO;
......
...@@ -246,6 +246,7 @@ enum qeth_ipa_funcs { ...@@ -246,6 +246,7 @@ enum qeth_ipa_funcs {
IPA_QUERY_ARP_ASSIST = 0x00040000L, IPA_QUERY_ARP_ASSIST = 0x00040000L,
IPA_INBOUND_TSO = 0x00080000L, IPA_INBOUND_TSO = 0x00080000L,
IPA_OUTBOUND_TSO = 0x00100000L, IPA_OUTBOUND_TSO = 0x00100000L,
IPA_INBOUND_CHECKSUM_V6 = 0x00400000L,
IPA_OUTBOUND_CHECKSUM_V6 = 0x00800000L, IPA_OUTBOUND_CHECKSUM_V6 = 0x00800000L,
}; };
......
...@@ -992,15 +992,16 @@ static int qeth_l2_setup_netdev(struct qeth_card *card) ...@@ -992,15 +992,16 @@ static int qeth_l2_setup_netdev(struct qeth_card *card)
card->dev->hw_features |= NETIF_F_IP_CSUM; card->dev->hw_features |= NETIF_F_IP_CSUM;
card->dev->vlan_features |= NETIF_F_IP_CSUM; card->dev->vlan_features |= NETIF_F_IP_CSUM;
} }
if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) {
card->dev->hw_features |= NETIF_F_RXCSUM;
card->dev->vlan_features |= NETIF_F_RXCSUM;
}
} }
if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) { if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
card->dev->hw_features |= NETIF_F_IPV6_CSUM; card->dev->hw_features |= NETIF_F_IPV6_CSUM;
card->dev->vlan_features |= NETIF_F_IPV6_CSUM; card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
} }
if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
card->dev->hw_features |= NETIF_F_RXCSUM;
card->dev->vlan_features |= NETIF_F_RXCSUM;
}
card->info.broadcast_capable = 1; card->info.broadcast_capable = 1;
qeth_l2_request_initial_mac(card); qeth_l2_request_initial_mac(card);
......
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