| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
|---|---|
| 2 | /**************************************************************************** |
| 3 | * Driver for Solarflare network controllers and boards |
| 4 | * Copyright 2005-2006 Fen Systems Ltd. |
| 5 | * Copyright 2006-2015 Solarflare Communications Inc. |
| 6 | */ |
| 7 | |
| 8 | #ifndef EFX_TX_H |
| 9 | #define EFX_TX_H |
| 10 | |
| 11 | #include <linux/types.h> |
| 12 | |
| 13 | /* Driver internal tx-path related declarations. */ |
| 14 | |
| 15 | unsigned int efx_tx_limit_len(struct efx_tx_queue *tx_queue, |
| 16 | dma_addr_t dma_addr, unsigned int len); |
| 17 | |
| 18 | u8 *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? */ |
| 22 | static 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 on |
| 30 | * encapsulated packets, so if the checksum is for the inner |
| 31 | * 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 |