write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/net/ethernet/sfc/tx.h
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@@ -1,11 +1,8 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /****************************************************************************
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  * Driver for Solarflare network controllers and boards
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  * Copyright 2005-2006 Fen Systems Ltd.
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  * Copyright 2006-2015 Solarflare Communications Inc.
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License version 2 as published
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- * by the Free Software Foundation, incorporated herein by reference.
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  */
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 #ifndef EFX_TX_H
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@@ -21,7 +18,30 @@
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 u8 *efx_tx_get_copy_buffer_limited(struct efx_tx_queue *tx_queue,
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 				   struct efx_tx_buffer *buffer, size_t len);
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-int efx_enqueue_skb_tso(struct efx_tx_queue *tx_queue, struct sk_buff *skb,
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-			bool *data_mapped);
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+/* What TXQ type will satisfy the checksum offloads required for this skb? */
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+static inline unsigned int efx_tx_csum_type_skb(struct sk_buff *skb)
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+{
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+	if (skb->ip_summed != CHECKSUM_PARTIAL)
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+		return 0; /* no checksum offload */
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+	if (skb->encapsulation &&
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+	    skb_checksum_start_offset(skb) == skb_inner_transport_offset(skb)) {
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+		/* we only advertise features for IPv4 and IPv6 checksums on
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+		 * encapsulated packets, so if the checksum is for the inner
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+		 * packet, it must be one of them; no further checking required.
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+		 */
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+
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+		/* Do we also need to offload the outer header checksum? */
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+		if (skb_shinfo(skb)->gso_segs > 1 &&
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+		    !(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&
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+		    (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM))
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+			return EFX_TXQ_TYPE_OUTER_CSUM | EFX_TXQ_TYPE_INNER_CSUM;
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+		return EFX_TXQ_TYPE_INNER_CSUM;
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+	}
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+
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+	/* similarly, we only advertise features for IPv4 and IPv6 checksums,
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+	 * so it must be one of them. No need for further checks.
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+	 */
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+	return EFX_TXQ_TYPE_OUTER_CSUM;
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+}
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 #endif /* EFX_TX_H */