diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/tx.h')
| -rw-r--r-- | drivers/net/ethernet/sfc/tx.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/tx.h b/drivers/net/ethernet/sfc/tx.h index a3cf06c5570d..f2c4d2f89919 100644 --- a/drivers/net/ethernet/sfc/tx.h +++ b/drivers/net/ethernet/sfc/tx.h @@ -18,4 +18,30 @@ unsigned int efx_tx_limit_len(struct efx_tx_queue *tx_queue, u8 *efx_tx_get_copy_buffer_limited(struct efx_tx_queue *tx_queue, struct efx_tx_buffer *buffer, size_t len); +/* What TXQ type will satisfy the checksum offloads required for this skb? */ +static inline unsigned int efx_tx_csum_type_skb(struct sk_buff *skb) +{ + if (skb->ip_summed != CHECKSUM_PARTIAL) + return 0; /* no checksum offload */ + + if (skb->encapsulation && + skb_checksum_start_offset(skb) == skb_inner_transport_offset(skb)) { + /* we only advertise features for IPv4 and IPv6 checksums on + * encapsulated packets, so if the checksum is for the inner + * packet, it must be one of them; no further checking required. + */ + + /* Do we also need to offload the outer header checksum? */ + if (skb_shinfo(skb)->gso_segs > 1 && + !(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) && + (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM)) + return EFX_TXQ_TYPE_OUTER_CSUM | EFX_TXQ_TYPE_INNER_CSUM; + return EFX_TXQ_TYPE_INNER_CSUM; + } + + /* similarly, we only advertise features for IPv4 and IPv6 checksums, + * so it must be one of them. No need for further checks. + */ + return EFX_TXQ_TYPE_OUTER_CSUM; +} #endif /* EFX_TX_H */ |