Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /****************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Driver for Solarflare network controllers and boards
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Copyright 2005-2006 Fen Systems Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright 2006-2015 Solarflare Communications Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #ifndef EFX_TX_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #define EFX_TX_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /* Driver internal tx-path related declarations. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) unsigned int efx_tx_limit_len(struct efx_tx_queue *tx_queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 			      dma_addr_t dma_addr, unsigned int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) u8 *efx_tx_get_copy_buffer_limited(struct efx_tx_queue *tx_queue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 				   struct efx_tx_buffer *buffer, size_t len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /* What TXQ type will satisfy the checksum offloads required for this skb? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static inline unsigned int efx_tx_csum_type_skb(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	if (skb->ip_summed != CHECKSUM_PARTIAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		return 0; /* no checksum offload */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	if (skb->encapsulation &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	    skb_checksum_start_offset(skb) == skb_inner_transport_offset(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		/* we only advertise features for IPv4 and IPv6 checksums on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		 * encapsulated packets, so if the checksum is for the inner
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		 * packet, it must be one of them; no further checking required.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		/* Do we also need to offload the outer header checksum? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		if (skb_shinfo(skb)->gso_segs > 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		    !(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		    (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 			return EFX_TXQ_TYPE_OUTER_CSUM | EFX_TXQ_TYPE_INNER_CSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		return EFX_TXQ_TYPE_INNER_CSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	/* similarly, we only advertise features for IPv4 and IPv6 checksums,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	 * so it must be one of them. No need for further checks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	return EFX_TXQ_TYPE_OUTER_CSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #endif /* EFX_TX_H */