linux-kernel - [PATCH net-next 2/2] r8152: use napi_gro

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Message-ID: <20230911080504.5513-425-nic_swsd@realtek.com>
Date:   Mon, 11 Sep 2023 16:05:04 +0800
From:   Hayes Wang <hayeswang@...ltek.com>
To:     <kuba@...nel.org>, <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <nic_swsd@...ltek.com>,
        <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
        Hayes Wang <hayeswang@...ltek.com>
Subject: [PATCH net-next 2/2] r8152: use napi_gro_frags

Use napi_gro_frags() for the skb of fragments.

Signed-off-by: Hayes Wang <hayeswang@...ltek.com>
---
 drivers/net/usb/r8152.c | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 62f121b462cb..5023e33dc505 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -2462,8 +2462,9 @@ static int rx_bottom(struct r8152 *tp, int budget)
 		while (urb->actual_length > len_used) {
 			struct net_device *netdev = tp->netdev;
 			struct net_device_stats *stats = &netdev->stats;
-			unsigned int pkt_len, rx_frag_head_sz;
+			unsigned int pkt_len;
 			struct sk_buff *skb;
+			bool use_frags;
 
 			pkt_len = le32_to_cpu(rx_desc->opts1) & RX_LEN_MASK;
 			if (pkt_len < ETH_ZLEN)
@@ -2477,35 +2478,40 @@ static int rx_bottom(struct r8152 *tp, int budget)
 			rx_data += sizeof(struct rx_desc);
 
 			if (!agg_free || tp->rx_copybreak > pkt_len)
-				rx_frag_head_sz = pkt_len;
+				use_frags = false;
 			else
-				rx_frag_head_sz = tp->rx_copybreak;
+				use_frags = true;
+
+			if (use_frags)
+				skb = napi_get_frags(napi);
+			else
+				skb = napi_alloc_skb(napi, pkt_len);
 
-			skb = napi_alloc_skb(napi, rx_frag_head_sz);
 			if (!skb) {
 				stats->rx_dropped++;
 				goto find_next_rx;
 			}
 
 			skb->ip_summed = r8152_rx_csum(tp, rx_desc);
-			memcpy(skb->data, rx_data, rx_frag_head_sz);
-			skb_put(skb, rx_frag_head_sz);
-			pkt_len -= rx_frag_head_sz;
-			rx_data += rx_frag_head_sz;
-			if (pkt_len) {
+			rtl_rx_vlan_tag(rx_desc, skb);
+
+			if (use_frags) {
 				skb_add_rx_frag(skb, 0, agg->page,
 						agg_offset(agg, rx_data),
 						pkt_len,
 						SKB_DATA_ALIGN(pkt_len));
 				get_page(agg->page);
+				napi_gro_frags(napi);
+			} else {
+				memcpy(skb->data, rx_data, pkt_len);
+				skb_put(skb, pkt_len);
+				skb->protocol = eth_type_trans(skb, netdev);
+				napi_gro_receive(napi, skb);
 			}
 
-			skb->protocol = eth_type_trans(skb, netdev);
-			rtl_rx_vlan_tag(rx_desc, skb);
 			work_done++;
 			stats->rx_packets++;
-			stats->rx_bytes += skb->len;
-			napi_gro_receive(napi, skb);
+			stats->rx_bytes += pkt_len;
 
 find_next_rx:
 			rx_data = rx_agg_align(rx_data + pkt_len + ETH_FCS_LEN);
-- 
2.41.0