| /* 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 */ |
