Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

[platform/kernel/linux-starfive.git] / drivers / net / ethernet / sfc / tx.h

diff --git a/drivers/net/ethernet/sfc/tx.h b/drivers/net/ethernet/sfc/tx.h
index a3cf06c..f2c4d2f 100644 (file)
--- a/drivers/net/ethernet/sfc/tx.h
+++ b/drivers/net/ethernet/sfc/tx.h
@@ -18,4 +18,30 @@ unsigned int efx_tx_limit_len(struct efx_tx_queue *tx_queue,
 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 */