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sfc: correctly support non-partial GSO_UDP_TUNNEL_CSUM on EF100 

By asking the HW for the correct edits, we can make UDP tunnel TSO
 work without needing GSO_PARTIAL.  So don't specify it in our
 netdev->gso_partial_features.
However, retain GSO_PARTIAL support, as this will be used for other
 protocols later.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Martin Habets <mhabets@solarflare.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
This commit is contained in:
Edward Cree 2020-11-12 15:19:47 +00:00 committed by Jakub Kicinski
parent dc8d2512e6
commit 42bfd69a9f
2 changed files with 5 additions and 2 deletions
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1
drivers/net/ethernet/sfc/ef100_nic.c
View File

@ -190,7 +190,6 @@ static int efx_ef100_init_datapath_caps(struct efx_nic *efx)
net_dev->features |= tso;
net_dev->hw_features |= tso;
net_dev->hw_enc_features |= tso;
net_dev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL | NETIF_F_GSO_UDP_TUNNEL_CSUM;
}
efx->num_mac_stats = MCDI_WORD(outbuf,
GET_CAPABILITIES_V4_OUT_MAC_STATS_NUM_STATS);

6
drivers/net/ethernet/sfc/ef100_tx.c
View File

@ -196,6 +196,7 @@ static void ef100_make_tso_desc(struct efx_nic *efx,
bool encap = skb->encapsulation;
u16 vlan_enable = 0;
struct tcphdr *tcp;
bool outer_csum;
u32 paylen;
if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_FIXEDID)
@ -216,19 +217,21 @@ static void ef100_make_tso_desc(struct efx_nic *efx,
tcp_offset = skb_transport_offset(skb);
outer_ip_offset = outer_l4_offset = 0;
}
outer_csum = skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM;
/* subtract TCP payload length from inner checksum */
tcp = (void *)skb->data + tcp_offset;
paylen = skb->len - tcp_offset;
csum_replace_by_diff(&tcp->check, (__force __wsum)htonl(paylen));
EFX_POPULATE_OWORD_17(*txd,
EFX_POPULATE_OWORD_19(*txd,
ESF_GZ_TX_DESC_TYPE, ESE_GZ_TX_DESC_TYPE_TSO,
ESF_GZ_TX_TSO_MSS, mss,
ESF_GZ_TX_TSO_HDR_NUM_SEGS, 1,
ESF_GZ_TX_TSO_PAYLOAD_NUM_SEGS, payload_segs,
ESF_GZ_TX_TSO_HDR_LEN_W, buffer->len >> 1,
ESF_GZ_TX_TSO_PAYLOAD_LEN, len,
ESF_GZ_TX_TSO_CSO_OUTER_L4, outer_csum,
ESF_GZ_TX_TSO_CSO_INNER_L4, 1,
ESF_GZ_TX_TSO_INNER_L3_OFF_W, ip_offset >> 1,
ESF_GZ_TX_TSO_INNER_L4_OFF_W, tcp_offset >> 1,
@ -237,6 +240,7 @@ static void ef100_make_tso_desc(struct efx_nic *efx,
ESF_GZ_TX_TSO_OUTER_L3_OFF_W, outer_ip_offset >> 1,
ESF_GZ_TX_TSO_OUTER_L4_OFF_W, outer_l4_offset >> 1,
ESF_GZ_TX_TSO_ED_OUTER_UDP_LEN, encap && !gso_partial,
ESF_GZ_TX_TSO_ED_OUTER_IP_LEN, encap && !gso_partial,
ESF_GZ_TX_TSO_ED_OUTER_IP4_ID, encap ? mangleid :
ESE_GZ_TX_DESC_IP4_ID_NO_OP,
ESF_GZ_TX_TSO_VLAN_INSERT_EN, vlan_enable,