Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sfc/tx.h b/drivers/net/ethernet/sfc/tx.h
new file mode 100644
index 000000000..f2c4d2f89
--- /dev/null
+++ b/drivers/net/ethernet/sfc/tx.h
@@ -0,0 +1,47 @@
+/* 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 */