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1/* SPDX-License-Identifier: GPL-2.0-only */2/****************************************************************************3 * Driver for Solarflare network controllers and boards4 * Copyright 2005-2006 Fen Systems Ltd.5 * Copyright 2006-2015 Solarflare Communications Inc.6 */7 8#ifndef EFX_TX_H9#define EFX_TX_H10 11#include <linux/types.h>12 13/* Driver internal tx-path related declarations. */14 15unsigned int efx_tx_limit_len(struct efx_tx_queue *tx_queue,16 dma_addr_t dma_addr, unsigned int len);17 18u8 *efx_tx_get_copy_buffer_limited(struct efx_tx_queue *tx_queue,19 struct efx_tx_buffer *buffer, size_t len);20 21/* What TXQ type will satisfy the checksum offloads required for this skb? */22static inline unsigned int efx_tx_csum_type_skb(struct sk_buff *skb)23{24 if (skb->ip_summed != CHECKSUM_PARTIAL)25 return 0; /* no checksum offload */26 27 if (skb->encapsulation &&28 skb_checksum_start_offset(skb) == skb_inner_transport_offset(skb)) {29 /* we only advertise features for IPv4 and IPv6 checksums on30 * encapsulated packets, so if the checksum is for the inner31 * packet, it must be one of them; no further checking required.32 */33 34 /* Do we also need to offload the outer header checksum? */35 if (skb_shinfo(skb)->gso_segs > 1 &&36 !(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&37 (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM))38 return EFX_TXQ_TYPE_OUTER_CSUM | EFX_TXQ_TYPE_INNER_CSUM;39 return EFX_TXQ_TYPE_INNER_CSUM;40 }41 42 /* similarly, we only advertise features for IPv4 and IPv6 checksums,43 * so it must be one of them. No need for further checks.44 */45 return EFX_TXQ_TYPE_OUTER_CSUM;46}47#endif /* EFX_TX_H */48