/* 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. */ unsigned int efx_tx_limit_len(struct efx_tx_queue *tx_queue, dma_addr_t dma_addr, unsigned int len); 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 */