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
15unsigned int efx_tx_limit_len(struct efx_tx_queue *tx_queue,
16			      dma_addr_t dma_addr, unsigned int len);
17
18/* What TXQ type will satisfy the checksum offloads required for this skb? */
19static inline unsigned int efx_tx_csum_type_skb(struct sk_buff *skb)
20{
21	if (skb->ip_summed != CHECKSUM_PARTIAL)
22		return 0; /* no checksum offload */
23
24	if (skb->encapsulation &&
25	    skb_checksum_start_offset(skb) == skb_inner_transport_offset(skb)) {
26		/* we only advertise features for IPv4 and IPv6 checksums on
27		 * encapsulated packets, so if the checksum is for the inner
28		 * packet, it must be one of them; no further checking required.
29		 */
30
31		/* Do we also need to offload the outer header checksum? */
32		if (skb_shinfo(skb)->gso_segs > 1 &&
33		    !(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&
34		    (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM))
35			return EFX_TXQ_TYPE_OUTER_CSUM | EFX_TXQ_TYPE_INNER_CSUM;
36		return EFX_TXQ_TYPE_INNER_CSUM;
37	}
38
39	/* similarly, we only advertise features for IPv4 and IPv6 checksums,
40	 * so it must be one of them. No need for further checks.
41	 */
42	return EFX_TXQ_TYPE_OUTER_CSUM;
43}
44#endif /* EFX_TX_H */

 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
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#endif /* EFX_TX_H */