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enic: Add vxlan offload support for IPv6 pkts

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New adaptors supports vxlan offload for inner IPv6 and outer IPv6 vxlan
pkts.

Fw sets BIT(0) & BIT(1) in a1 if hw supports ipv6 inner & outer pkt
offload.

Signed-off-by: Govindarajulu Varadarajan <gvaradar@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Govindarajulu Varadarajan 2018-03-01 11:07:20 -08:00 committed by David S. Miller
parent 4a464a2b06
commit d11790941d
5 changed files with 42 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/cisco/enic/enic.h
View File

@ -140,6 +140,7 @@ struct enic_rfs_flw_tbl {
struct vxlan_offload {
u16 vxlan_udp_port_number;
u8 patch_level;
u8 flags;
};
/* Per-instance private data structure */

44
drivers/net/ethernet/cisco/enic/enic_main.c
View File

@ -191,8 +191,16 @@ static void enic_udp_tunnel_add(struct net_device *netdev,
goto error;
}
if (ti->sa_family != AF_INET) {
netdev_info(netdev, "vxlan: only IPv4 offload supported");
switch (ti->sa_family) {
case AF_INET6:
if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6)) {
netdev_info(netdev, "vxlan: only IPv4 offload supported");
goto error;
}
/* Fall through */
case AF_INET:
break;
default:
goto error;
}
@ -271,22 +279,37 @@ static netdev_features_t enic_features_check(struct sk_buff *skb,
struct enic *enic = netdev_priv(dev);
struct udphdr *udph;
u16 port = 0;
u16 proto;
u8 proto;
if (!skb->encapsulation)
return features;
features = vxlan_features_check(skb, features);
/* hardware only supports IPv4 vxlan tunnel */
if (vlan_get_protocol(skb) != htons(ETH_P_IP))
switch (vlan_get_protocol(skb)) {
case htons(ETH_P_IPV6):
if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6))
goto out;
proto = ipv6_hdr(skb)->nexthdr;
break;
case htons(ETH_P_IP):
proto = ip_hdr(skb)->protocol;
break;
default:
goto out;
}
/* hardware does not support offload of ipv6 inner pkt */
if (eth->h_proto != ntohs(ETH_P_IP))
switch (eth->h_proto) {
case ntohs(ETH_P_IPV6):
if (!(enic->vxlan.flags & ENIC_VXLAN_INNER_IPV6))
goto out;
/* Fall through */
case ntohs(ETH_P_IP):
break;
default:
goto out;
}
proto = ip_hdr(skb)->protocol;
if (proto == IPPROTO_UDP) {
udph = udp_hdr(skb);
@ -2914,9 +2937,11 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
netdev->hw_features |= NETIF_F_RXCSUM;
if (ENIC_SETTING(enic, VXLAN)) {
u64 patch_level;
u64 a1 = 0;
netdev->hw_enc_features |= NETIF_F_RXCSUM |
NETIF_F_TSO |
NETIF_F_TSO6 |
NETIF_F_TSO_ECN |
NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_HW_CSUM |
@ -2935,9 +2960,10 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
*/
err = vnic_dev_get_supported_feature_ver(enic->vdev,
VIC_FEATURE_VXLAN,
&patch_level);
&patch_level, &a1);
if (err)
patch_level = 0;
enic->vxlan.flags = (u8)a1;
/* mask bits that are supported by driver
*/
patch_level &= BIT_ULL(0) | BIT_ULL(2);

5
drivers/net/ethernet/cisco/enic/vnic_dev.c
View File

@ -1269,14 +1269,13 @@ int vnic_dev_overlay_offload_cfg(struct vnic_dev *vdev, u8 overlay,
}
int vnic_dev_get_supported_feature_ver(struct vnic_dev *vdev, u8 feature,
u64 *supported_versions)
u64 *supported_versions, u64 *a1)
{
u64 a0 = feature;
int wait = 1000;
u64 a1 = 0;
int ret;
ret = vnic_dev_cmd(vdev, CMD_GET_SUPP_FEATURE_VER, &a0, &a1, wait);
ret = vnic_dev_cmd(vdev, CMD_GET_SUPP_FEATURE_VER, &a0, a1, wait);
if (!ret)
*supported_versions = a0;

2
drivers/net/ethernet/cisco/enic/vnic_dev.h
View File

@ -183,6 +183,6 @@ int vnic_dev_overlay_offload_ctrl(struct vnic_dev *vdev, u8 overlay, u8 config);
int vnic_dev_overlay_offload_cfg(struct vnic_dev *vdev, u8 overlay,
u16 vxlan_udp_port_number);
int vnic_dev_get_supported_feature_ver(struct vnic_dev *vdev, u8 feature,
u64 *supported_versions);
u64 *supported_versions, u64 *a1);
#endif /* _VNIC_DEV_H_ */

3
drivers/net/ethernet/cisco/enic/vnic_devcmd.h
View File

@ -697,6 +697,9 @@ enum overlay_ofld_cmd {
#define OVERLAY_CFG_VXLAN_PORT_UPDATE 0
#define ENIC_VXLAN_INNER_IPV6 BIT(0)
#define ENIC_VXLAN_OUTER_IPV6 BIT(1)
/* Use this enum to get the supported versions for each of these features
* If you need to use the devcmd_get_supported_feature_version(), add
* the new feature into this enum and install function handler in devcmd.c