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i40e/i40evf: Add support for GSO partial with UDP_TUNNEL_CSUM and GRE_CSUM 

This patch makes it so that i40e and i40evf can use GSO_PARTIAL to support
segmentation for frames with checksums enabled in outer headers.  As a
result we can now send data over these types of tunnels at over 20Gb/s
versus the 12Gb/s that was previously possible on my system.

The advantage with the i40e parts is that this offload is mostly
transparent as the hardware still deals with the inner and/or outer IPv4
headers so the IP ID is still incrementing for both when this offload is
performed.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2016-04-14 17:19:25 -04:00 коммит произвёл Jeff Kirsher
Родитель ae63bff0d7
Коммит 1c7b4a23d1
4 изменённых файлов: 28 добавлений и 6 удалений
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10
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -9130,20 +9130,25 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
NETIF_F_TSO_ECN |
NETIF_F_TSO6 |
NETIF_F_GSO_GRE |
NETIF_F_GSO_GRE_CSUM |
NETIF_F_GSO_IPIP |
NETIF_F_GSO_SIT |
NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM |
NETIF_F_GSO_PARTIAL |
NETIF_F_SCTP_CRC |
NETIF_F_RXHASH |
NETIF_F_RXCSUM |
0;
if (!(pf->flags & I40E_FLAG_OUTER_UDP_CSUM_CAPABLE))
netdev->hw_enc_features ^= NETIF_F_GSO_UDP_TUNNEL_CSUM;
netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
/* record features VLANs can make use of */
netdev->vlan_features |= netdev->hw_enc_features;
netdev->vlan_features |= netdev->hw_enc_features |
NETIF_F_TSO_MANGLEID;
if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
netdev->hw_features |= NETIF_F_NTUPLE;
@ -9153,6 +9158,7 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
NETIF_F_HW_VLAN_CTAG_RX;
netdev->features |= netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
if (vsi->type == I40E_VSI_MAIN) {
SET_NETDEV_DEV(netdev, &pf->pdev->dev);

7
drivers/net/ethernet/intel/i40e/i40e_txrx.c
Просмотреть файл

@ -2301,11 +2301,15 @@ static int i40e_tso(struct sk_buff *skb, u8 *hdr_len, u64 *cd_type_cmd_tso_mss)
}
if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
SKB_GSO_GRE_CSUM |
SKB_GSO_IPIP |
SKB_GSO_SIT |
SKB_GSO_UDP_TUNNEL |
SKB_GSO_UDP_TUNNEL_CSUM)) {
if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM) {
if (!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&
(skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM)) {
l4.udp->len = 0;
/* determine offset of outer transport header */
l4_offset = l4.hdr - skb->data;
@ -2482,6 +2486,7 @@ static int i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags,
/* indicate if we need to offload outer UDP header */
if ((*tx_flags & I40E_TX_FLAGS_TSO) &&
!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&
(skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM))
tunnel |= I40E_TXD_CTX_QW0_L4T_CS_MASK;

7
drivers/net/ethernet/intel/i40evf/i40e_txrx.c
Просмотреть файл

@ -1566,11 +1566,15 @@ static int i40e_tso(struct sk_buff *skb, u8 *hdr_len, u64 *cd_type_cmd_tso_mss)
}
if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
SKB_GSO_GRE_CSUM |
SKB_GSO_IPIP |
SKB_GSO_SIT |
SKB_GSO_UDP_TUNNEL |
SKB_GSO_UDP_TUNNEL_CSUM)) {
if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM) {
if (!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&
(skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM)) {
l4.udp->len = 0;
/* determine offset of outer transport header */
l4_offset = l4.hdr - skb->data;
@ -1705,6 +1709,7 @@ static int i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags,
/* indicate if we need to offload outer UDP header */
if ((*tx_flags & I40E_TX_FLAGS_TSO) &&
!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&
(skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM))
tunnel |= I40E_TXD_CTX_QW0_L4T_CS_MASK;

10
drivers/net/ethernet/intel/i40evf/i40evf_main.c
Просмотреть файл

@ -2240,20 +2240,25 @@ int i40evf_process_config(struct i40evf_adapter *adapter)
NETIF_F_TSO_ECN |
NETIF_F_TSO6 |
NETIF_F_GSO_GRE |
NETIF_F_GSO_GRE_CSUM |
NETIF_F_GSO_IPIP |
NETIF_F_GSO_SIT |
NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM |
NETIF_F_GSO_PARTIAL |
NETIF_F_SCTP_CRC |
NETIF_F_RXHASH |
NETIF_F_RXCSUM |
0;
if (!(adapter->flags & I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE))
netdev->hw_enc_features ^= NETIF_F_GSO_UDP_TUNNEL_CSUM;
netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
/* record features VLANs can make use of */
netdev->vlan_features |= netdev->hw_enc_features;
netdev->vlan_features |= netdev->hw_enc_features |
NETIF_F_TSO_MANGLEID;
/* Write features and hw_features separately to avoid polluting
* with, or dropping, features that are set when we registgered.
@ -2261,6 +2266,7 @@ int i40evf_process_config(struct i40evf_adapter *adapter)
netdev->hw_features |= netdev->hw_enc_features;
netdev->features |= netdev->hw_enc_features | I40EVF_VLAN_FEATURES;
netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
/* disable VLAN features if not supported */
if (!(vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN))