[openwrt/openwrt] ramips/mediatek: enable threaded NAPI in the ethernet driver

[LEDE Commits]

nbd pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/fdbb468c5998d9adb1819751ffaf38013768a8eb

commit fdbb468c5998d9adb1819751ffaf38013768a8eb
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Mon Mar 21 20:57:41 2022 +0100

    ramips/mediatek: enable threaded NAPI in the ethernet driver
    
    Improves performance, especially under load
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 ...ethernet-mtk_eth_soc-enable-threaded-NAPI.patch | 41 ++++++++++++++++++++++
 ...-net-mediatek-add-flow-offload-for-mt7623.patch |  2 +-
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/target/linux/generic/pending-5.10/702-net-ethernet-mtk_eth_soc-enable-threaded-NAPI.patch b/target/linux/generic/pending-5.10/702-net-ethernet-mtk_eth_soc-enable-threaded-NAPI.patch
new file mode 100644
index 0000000000..da9c040322
--- /dev/null
+++ b/target/linux/generic/pending-5.10/702-net-ethernet-mtk_eth_soc-enable-threaded-NAPI.patch
@@ -0,0 +1,41 @@
+From: Felix Fietkau <nbd at nbd.name>
+Date: Mon, 21 Mar 2022 20:39:59 +0100
+Subject: [PATCH] net: ethernet: mtk_eth_soc: enable threaded NAPI
+
+This can improve performance under load by ensuring that NAPI processing is
+not pinned on CPU 0.
+
+Signed-off-by: Felix Fietkau <nbd at nbd.name>
+---
+
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -2171,8 +2171,8 @@ static irqreturn_t mtk_handle_irq_rx(int
+ 
+ 	eth->rx_events++;
+ 	if (likely(napi_schedule_prep(&eth->rx_napi))) {
+-		__napi_schedule(&eth->rx_napi);
+ 		mtk_rx_irq_disable(eth, MTK_RX_DONE_INT);
++		__napi_schedule(&eth->rx_napi);
+ 	}
+ 
+ 	return IRQ_HANDLED;
+@@ -2184,8 +2184,8 @@ static irqreturn_t mtk_handle_irq_tx(int
+ 
+ 	eth->tx_events++;
+ 	if (likely(napi_schedule_prep(&eth->tx_napi))) {
+-		__napi_schedule(&eth->tx_napi);
+ 		mtk_tx_irq_disable(eth, MTK_TX_DONE_INT);
++		__napi_schedule(&eth->tx_napi);
+ 	}
+ 
+ 	return IRQ_HANDLED;
+@@ -3229,6 +3229,8 @@ static int mtk_probe(struct platform_dev
+ 	 * for NAPI to work
+ 	 */
+ 	init_dummy_netdev(&eth->dummy_dev);
++	eth->dummy_dev.threaded = 1;
++	strcpy(eth->dummy_dev.name, "mtk_eth");
+ 	netif_napi_add(&eth->dummy_dev, &eth->tx_napi, mtk_napi_tx,
+ 		       MTK_NAPI_WEIGHT);
+ 	netif_napi_add(&eth->dummy_dev, &eth->rx_napi, mtk_napi_rx,
diff --git a/target/linux/mediatek/patches-5.10/510-net-mediatek-add-flow-offload-for-mt7623.patch b/target/linux/mediatek/patches-5.10/510-net-mediatek-add-flow-offload-for-mt7623.patch
index e6a8ba9935..dd2b70aa10 100644
--- a/target/linux/mediatek/patches-5.10/510-net-mediatek-add-flow-offload-for-mt7623.patch
+++ b/target/linux/mediatek/patches-5.10/510-net-mediatek-add-flow-offload-for-mt7623.patch
@@ -14,7 +14,7 @@ Signed-off-by: Frank Wunderlich <frank-w at public-files.de>
 
 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
-@@ -3302,6 +3302,7 @@ static const struct mtk_soc_data mt7623_
+@@ -3304,6 +3304,7 @@ static const struct mtk_soc_data mt7623_
  	.hw_features = MTK_HW_FEATURES,
  	.required_clks = MT7623_CLKS_BITMAP,
  	.required_pctl = true,