kernel: improve skb hash on the mtk ethernet driver

The PPE only provides a 14 bit hash, however many uses of the skb hash
expect the hash to use the full 32 bit range.
Use jhash to extend the hash to the full size

Signed-off-by: Felix Fietkau <nbd@nbd.name>

5 files changed, 35 insertions, 25 deletions

diff --git a/target/linux/generic/pending-5.4/770-13-net-ethernet-mtk_eth_soc-fix-parsing-packets-in-GDM.patch b/target/linux/generic/pending-5.4/770-13-net-ethernet-mtk_eth_soc-fix-parsing-packets-in-GDM.patch
index 9ef675dcd1..16993b9d80 100644
--- a/target/linux/generic/pending-5.4/770-13-net-ethernet-mtk_eth_soc-fix-parsing-packets-in-GDM.patch
+++ b/target/linux/generic/pending-5.4/770-13-net-ethernet-mtk_eth_soc-fix-parsing-packets-in-GDM.patch
@@ -18,15 +18,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  #include "mtk_eth_soc.h"
  
-@@ -1246,6 +1247,7 @@ static int mtk_poll_rx(struct napi_struc
- 		unsigned int pktlen;
- 		dma_addr_t dma_addr;
- 		int mac;
-+		u16 hash;
- 
- 		ring = mtk_get_rx_ring(eth);
- 		if (unlikely(!ring))
-@@ -1259,13 +1261,12 @@ static int mtk_poll_rx(struct napi_struc
+@@ -1259,13 +1260,12 @@ static int mtk_poll_rx(struct napi_struc
  			break;
  
  		/* find out which mac the packet come from. values start at 1 */
@@ -45,7 +37,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  		if (unlikely(mac < 0 || mac >= MTK_MAC_COUNT ||
  			     !eth->netdev[mac]))
-@@ -2247,6 +2248,9 @@ static void mtk_gdm_config(struct mtk_et
+@@ -2247,6 +2247,9 @@ static void mtk_gdm_config(struct mtk_et
  
  		val |= config;
  
diff --git a/target/linux/generic/pending-5.4/770-14-net-ethernet-mtk_eth_soc-set-PPE-flow-hash-as-skb-ha.patch b/target/linux/generic/pending-5.4/770-14-net-ethernet-mtk_eth_soc-set-PPE-flow-hash-as-skb-ha.patch
index 60ac12c013..68ae19ec6e 100644
--- a/target/linux/generic/pending-5.4/770-14-net-ethernet-mtk_eth_soc-set-PPE-flow-hash-as-skb-ha.patch
+++ b/target/linux/generic/pending-5.4/770-14-net-ethernet-mtk_eth_soc-set-PPE-flow-hash-as-skb-ha.patch
@@ -10,13 +10,31 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 
 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
-@@ -1316,6 +1316,10 @@ static int mtk_poll_rx(struct napi_struc
+@@ -19,6 +19,7 @@
+ #include <linux/interrupt.h>
+ #include <linux/pinctrl/devinfo.h>
+ #include <linux/phylink.h>
++#include <linux/jhash.h>
+ #include <net/dsa.h>
+ 
+ #include "mtk_eth_soc.h"
+@@ -1246,6 +1247,7 @@ static int mtk_poll_rx(struct napi_struc
+ 		struct net_device *netdev;
+ 		unsigned int pktlen;
+ 		dma_addr_t dma_addr;
++		u32 hash;
+ 		int mac;
+ 
+ 		ring = mtk_get_rx_ring(eth);
+@@ -1315,6 +1317,12 @@ static int mtk_poll_rx(struct napi_struc
  		skb->protocol = eth_type_trans(skb, netdev);
  		bytes += pktlen;
  
 +		hash = trxd.rxd4 & GENMASK(13, 0);
-+		if (hash != GENMASK(13, 0))
++		if (hash != GENMASK(13, 0)) {
++			hash = jhash_1word(hash, 0);
 +			skb_set_hash(skb, hash, PKT_HASH_TYPE_L4);
++		}
 +
  		if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX &&
  		    (trxd.rxd2 & RX_DMA_VTAG))
diff --git a/target/linux/generic/pending-5.4/770-15-net-ethernet-mediatek-mtk_eth_soc-add-support-for-in.patch b/target/linux/generic/pending-5.4/770-15-net-ethernet-mediatek-mtk_eth_soc-add-support-for-in.patch
index 6d729c0f08..d679e30bea 100644
--- a/target/linux/generic/pending-5.4/770-15-net-ethernet-mediatek-mtk_eth_soc-add-support-for-in.patch
+++ b/target/linux/generic/pending-5.4/770-15-net-ethernet-mediatek-mtk_eth_soc-add-support-for-in.patch
@@ -24,7 +24,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 +mtk_eth-y := mtk_eth_soc.o mtk_sgmii.o mtk_eth_path.o mtk_ppe.o
 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
-@@ -2277,12 +2277,17 @@ static int mtk_open(struct net_device *d
+@@ -2280,12 +2280,17 @@ static int mtk_open(struct net_device *d
  
  	/* we run 2 netdevs on the same dma ring so we only bring it up once */
  	if (!refcount_read(&eth->dma_refcnt)) {
@@ -44,7 +44,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  		napi_enable(&eth->tx_napi);
  		napi_enable(&eth->rx_napi);
-@@ -2352,6 +2357,9 @@ static int mtk_stop(struct net_device *d
+@@ -2355,6 +2360,9 @@ static int mtk_stop(struct net_device *d
  
  	mtk_dma_free(eth);
  
@@ -54,7 +54,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	return 0;
  }
  
-@@ -3141,6 +3149,13 @@ static int mtk_probe(struct platform_dev
+@@ -3144,6 +3152,13 @@ static int mtk_probe(struct platform_dev
  			goto err_free_dev;
  	}
  
@@ -68,7 +68,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	for (i = 0; i < MTK_MAX_DEVS; i++) {
  		if (!eth->netdev[i])
  			continue;
-@@ -3215,6 +3230,7 @@ static const struct mtk_soc_data mt7621_
+@@ -3218,6 +3233,7 @@ static const struct mtk_soc_data mt7621_
  	.hw_features = MTK_HW_FEATURES,
  	.required_clks = MT7621_CLKS_BITMAP,
  	.required_pctl = false,
@@ -76,7 +76,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  };
  
  static const struct mtk_soc_data mt7622_data = {
-@@ -3223,6 +3239,7 @@ static const struct mtk_soc_data mt7622_
+@@ -3226,6 +3242,7 @@ static const struct mtk_soc_data mt7622_
  	.hw_features = MTK_HW_FEATURES,
  	.required_clks = MT7622_CLKS_BITMAP,
  	.required_pctl = false,
diff --git a/target/linux/generic/pending-5.4/770-16-net-ethernet-mediatek-mtk_eth_soc-add-flow-offloadin.patch b/target/linux/generic/pending-5.4/770-16-net-ethernet-mediatek-mtk_eth_soc-add-flow-offloadin.patch
index 810eeda75c..f63ed28998 100644
--- a/target/linux/generic/pending-5.4/770-16-net-ethernet-mediatek-mtk_eth_soc-add-flow-offloadin.patch
+++ b/target/linux/generic/pending-5.4/770-16-net-ethernet-mediatek-mtk_eth_soc-add-flow-offloadin.patch
@@ -20,16 +20,16 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 +mtk_eth-y := mtk_eth_soc.o mtk_sgmii.o mtk_eth_path.o mtk_ppe.o mtk_ppe_debugfs.o mtk_offload.o
 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
-@@ -19,6 +19,8 @@
- #include <linux/interrupt.h>
+@@ -20,6 +20,8 @@
  #include <linux/pinctrl/devinfo.h>
  #include <linux/phylink.h>
+ #include <linux/jhash.h>
 +#include <linux/netfilter.h>
 +#include <net/netfilter/nf_flow_table.h>
  #include <net/dsa.h>
  
  #include "mtk_eth_soc.h"
-@@ -1324,8 +1326,12 @@ static int mtk_poll_rx(struct napi_struc
+@@ -1327,8 +1329,12 @@ static int mtk_poll_rx(struct napi_struc
  		    (trxd.rxd2 & RX_DMA_VTAG))
  			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
  					       RX_DMA_VID(trxd.rxd3));
@@ -44,7 +44,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  skip_rx:
  		ring->data[idx] = new_data;
-@@ -2858,6 +2864,25 @@ static int mtk_set_rxnfc(struct net_devi
+@@ -2861,6 +2867,25 @@ static int mtk_set_rxnfc(struct net_devi
  	return ret;
  }
  
@@ -70,7 +70,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  static const struct ethtool_ops mtk_ethtool_ops = {
  	.get_link_ksettings	= mtk_get_link_ksettings,
  	.set_link_ksettings	= mtk_set_link_ksettings,
-@@ -2889,6 +2914,7 @@ static const struct net_device_ops mtk_n
+@@ -2892,6 +2917,7 @@ static const struct net_device_ops mtk_n
  #ifdef CONFIG_NET_POLL_CONTROLLER
  	.ndo_poll_controller	= mtk_poll_controller,
  #endif
@@ -78,7 +78,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  };
  
  static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
-@@ -3154,6 +3180,10 @@ static int mtk_probe(struct platform_dev
+@@ -3157,6 +3183,10 @@ static int mtk_probe(struct platform_dev
  				   eth->base + MTK_ETH_PPE_BASE, 2);
  		if (err)
  			goto err_free_dev;
diff --git a/target/linux/mediatek/patches-5.4/1011-net-ethernet-mtk_eth_soc-add-support-for-coherent-DM.patch b/target/linux/mediatek/patches-5.4/1011-net-ethernet-mtk_eth_soc-add-support-for-coherent-DM.patch
index 18ddd0863e..efb30f2e50 100644
--- a/target/linux/mediatek/patches-5.4/1011-net-ethernet-mtk_eth_soc-add-support-for-coherent-DM.patch
+++ b/target/linux/mediatek/patches-5.4/1011-net-ethernet-mtk_eth_soc-add-support-for-coherent-DM.patch
@@ -37,7 +37,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  #include <linux/mfd/syscon.h>
  #include <linux/regmap.h>
  #include <linux/clk.h>
-@@ -2482,6 +2483,13 @@ static int mtk_hw_init(struct mtk_eth *e
+@@ -2485,6 +2486,13 @@ static int mtk_hw_init(struct mtk_eth *e
  	if (ret)
  		goto err_disable_pm;
  
@@ -51,7 +51,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
  		ret = device_reset(eth->dev);
  		if (ret) {
-@@ -3080,6 +3088,16 @@ static int mtk_probe(struct platform_dev
+@@ -3083,6 +3091,16 @@ static int mtk_probe(struct platform_dev
  		}
  	}