| /* 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); | |
| /* 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 */ |