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gve: add support for UDP GSO for DQO format

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Enable support for UDP GSO when using DQO format. Advertise the feature
flag during device initialization and enable offload by default.

Signed-off-by: Ankit Garg <nktgrg@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Harshitha Ramamurthy <hramamurthy@google.com>
Link: https://patch.msgid.link/20260306224816.3391551-1-hramamurthy@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ankit Garg 2026-03-06 22:48:16 +00:00 committed by Jakub Kicinski
parent dc9c9193c7
commit 014c607f86
2 changed files with 29 additions and 12 deletions
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8
drivers/net/ethernet/google/gve/gve_adminq.c
View File

@ -1117,10 +1117,12 @@ int gve_adminq_describe_device(struct gve_priv *priv)
gve_set_default_rss_sizes(priv); gve_set_default_rss_sizes(priv);
/* DQO supports HW-GRO. */ /* DQO supports HW-GRO and UDP_GSO */
if (gve_is_dqo(priv)) { if (gve_is_dqo(priv)) {
priv->dev->hw_features |= NETIF_F_GRO_HW; u64 additional_features = NETIF_F_GRO_HW | NETIF_F_GSO_UDP_L4;
priv->dev->features |= NETIF_F_GRO_HW;
priv->dev->hw_features |= additional_features;
priv->dev->features |= additional_features;
} }
priv->max_registered_pages = priv->max_registered_pages =

33
drivers/net/ethernet/google/gve/gve_tx_dqo.c
View File

@ -570,9 +570,11 @@ static void gve_tx_fill_pkt_desc_dqo(struct gve_tx_ring *tx, u32 *desc_idx,
*/ */
static int gve_prep_tso(struct sk_buff *skb) static int gve_prep_tso(struct sk_buff *skb)
{ {
struct skb_shared_info *shinfo = skb_shinfo(skb);
u32 paylen, l4_start;
struct tcphdr *tcp; struct tcphdr *tcp;
struct udphdr *udp;
int header_len; int header_len;
u32 paylen;
int err; int err;
/* Note: HW requires MSS (gso_size) to be <= 9728 and the total length /* Note: HW requires MSS (gso_size) to be <= 9728 and the total length
@ -583,21 +585,34 @@ static int gve_prep_tso(struct sk_buff *skb)
* - Kernel will not produce a TSO larger than 64k * - Kernel will not produce a TSO larger than 64k
*/ */
if (unlikely(skb_shinfo(skb)->gso_size < GVE_TX_MIN_TSO_MSS_DQO)) if (unlikely(shinfo->gso_size < GVE_TX_MIN_TSO_MSS_DQO))
return -1; return -1;
if (!(skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)))
return -EINVAL;
/* Needed because we will modify header. */ /* Needed because we will modify header. */
err = skb_cow_head(skb, 0); err = skb_cow_head(skb, 0);
if (err < 0) if (err < 0)
return err; return err;
tcp = tcp_hdr(skb); l4_start = skb_transport_offset(skb);
paylen = skb->len - skb_transport_offset(skb); paylen = skb->len - l4_start;
csum_replace_by_diff(&tcp->check, (__force __wsum)htonl(paylen));
header_len = skb_tcp_all_headers(skb); switch (shinfo->gso_type) {
case SKB_GSO_TCPV4:
case SKB_GSO_TCPV6:
tcp = tcp_hdr(skb);
csum_replace_by_diff(&tcp->check,
(__force __wsum)htonl(paylen));
header_len = skb_tcp_all_headers(skb);
break;
case SKB_GSO_UDP_L4:
udp = udp_hdr(skb);
csum_replace_by_diff(&udp->check,
(__force __wsum)htonl(paylen));
header_len = sizeof(struct udphdr) + l4_start;
break;
default:
return -EINVAL;
}
if (unlikely(header_len > GVE_TX_MAX_HDR_SIZE_DQO)) if (unlikely(header_len > GVE_TX_MAX_HDR_SIZE_DQO))
return -EINVAL; return -EINVAL;