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- /* SPDX-License-Identifier: GPL-2.0-only */
- /****************************************************************************
- * Driver for Solarflare network controllers and boards
- * Copyright 2005-2006 Fen Systems Ltd.
- * Copyright 2006-2015 Solarflare Communications Inc.
- */
- #ifndef EFX_TX_H
- #define EFX_TX_H
- #include <linux/types.h>
- /* Driver internal tx-path related declarations. */
- /* 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 */
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