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From: Lorenzo Bianconi <lorenzo@kernel.org>
To: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org,
	daniel@iogearbox.net, ast@kernel.org, echaudro@redhat.com,
	dsahern@gmail.com, magnus.karlsson@intel.com, toke@redhat.com,
	brouer@redhat.com, bjorn@kernel.org,
	maciej.fijalkowski@intel.com, john.fastabend@gmail.com
Subject: [RFC bpf-next 2/4] mvneta: return csum computation result from mvneta_rx_csum
Date: Fri, 28 May 2021 19:43:42 +0200	[thread overview]
Message-ID: <3d89a6af46b4b381256e050f2a02f87db06ceabb.1622222367.git.lorenzo@kernel.org> (raw)
In-Reply-To: <cover.1622222367.git.lorenzo@kernel.org>

This is a preliminary patch to add hw csum hint support to mvneta xdp
implementation

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 drivers/net/ethernet/marvell/mvneta.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 7d5cd9bc6c99..4a7c153a2666 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -1805,18 +1805,14 @@ static void mvneta_rx_error(struct mvneta_port *pp,
 }
 
 /* Handle RX checksum offload based on the descriptor's status */
-static void mvneta_rx_csum(struct mvneta_port *pp, u32 status,
-			   struct sk_buff *skb)
+static int mvneta_rx_csum(struct mvneta_port *pp, u32 status)
 {
 	if ((pp->dev->features & NETIF_F_RXCSUM) &&
 	    (status & MVNETA_RXD_L3_IP4) &&
-	    (status & MVNETA_RXD_L4_CSUM_OK)) {
-		skb->csum = 0;
-		skb->ip_summed = CHECKSUM_UNNECESSARY;
-		return;
-	}
+	    (status & MVNETA_RXD_L4_CSUM_OK))
+		return CHECKSUM_UNNECESSARY;
 
-	skb->ip_summed = CHECKSUM_NONE;
+	return CHECKSUM_NONE;
 }
 
 /* Return tx queue pointer (find last set bit) according to <cause> returned
@@ -2335,7 +2331,7 @@ mvneta_swbm_build_skb(struct mvneta_port *pp, struct mvneta_rx_queue *rxq,
 
 	skb_reserve(skb, xdp->data - xdp->data_hard_start);
 	skb_put(skb, xdp->data_end - xdp->data);
-	mvneta_rx_csum(pp, desc_status, skb);
+	skb->ip_summed = mvneta_rx_csum(pp, desc_status);
 
 	for (i = 0; i < num_frags; i++) {
 		skb_frag_t *frag = &sinfo->frags[i];
@@ -2532,7 +2528,7 @@ static int mvneta_rx_hwbm(struct napi_struct *napi,
 				     rx_bytes);
 
 			skb->protocol = eth_type_trans(skb, dev);
-			mvneta_rx_csum(pp, rx_status, skb);
+			skb->ip_summed = mvneta_rx_csum(pp, rx_status);
 			napi_gro_receive(napi, skb);
 
 			rcvd_pkts++;
@@ -2581,8 +2577,7 @@ static int mvneta_rx_hwbm(struct napi_struct *napi,
 		skb_put(skb, rx_bytes);
 
 		skb->protocol = eth_type_trans(skb, dev);
-
-		mvneta_rx_csum(pp, rx_status, skb);
+		skb->ip_summed = mvneta_rx_csum(pp, rx_status);
 
 		napi_gro_receive(napi, skb);
 	}
-- 
2.31.1


  parent reply	other threads:[~2021-05-28 17:44 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-28 17:43 [RFC bpf-next 0/4] add partial rx hw csum offload support for XDP Lorenzo Bianconi
2021-05-28 17:43 ` [RFC bpf-next 1/4] net: xdp: introduce flags field in xdp_buff and xdp_frame Lorenzo Bianconi
2021-05-28 21:18   ` Tom Herbert
2021-05-29  1:33     ` David Ahern
2021-05-29  4:56     ` Jakub Kicinski
2021-05-29 13:37       ` Lorenzo Bianconi
2021-05-29 13:34     ` Lorenzo Bianconi
2021-05-31 11:07       ` Jesper Dangaard Brouer
2021-05-28 17:43 ` Lorenzo Bianconi [this message]
2021-05-28 17:43 ` [RFC bpf-next 3/4] net: mvneta: report csum result in xdp_buff Lorenzo Bianconi
2021-05-28 17:43 ` [RFC bpf-next 4/4] net: xdp: update csum building the skb Lorenzo Bianconi
2021-05-28 18:01 ` [RFC bpf-next 0/4] add partial rx hw csum offload support for XDP David Ahern

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