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193 lines
5.3 KiB
Diff
193 lines
5.3 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Fri, 28 Oct 2022 11:01:12 +0200
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Subject: [PATCH] net: ethernet: mtk_eth_soc: fix VLAN rx hardware
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acceleration
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- enable VLAN untagging for PDMA rx
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- make it possible to disable the feature via ethtool
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- pass VLAN tag to the DSA driver
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- untag special tag on PDMA only if no non-DSA devices are in use
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- disable special tag untagging on 7986 for now, since it's not working yet
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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@@ -23,6 +23,7 @@
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#include <linux/jhash.h>
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#include <linux/bitfield.h>
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#include <net/dsa.h>
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+#include <net/dst_metadata.h>
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#include "mtk_eth_soc.h"
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#include "mtk_wed.h"
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@@ -1973,16 +1974,22 @@ static int mtk_poll_rx(struct napi_struc
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htons(RX_DMA_VPID(trxd.rxd4)),
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RX_DMA_VID(trxd.rxd4));
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} else if (trxd.rxd2 & RX_DMA_VTAG) {
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- __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
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+ __vlan_hwaccel_put_tag(skb, htons(RX_DMA_VPID(trxd.rxd3)),
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RX_DMA_VID(trxd.rxd3));
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}
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+ }
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+
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+ /* When using VLAN untagging in combination with DSA, the
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+ * hardware treats the MTK special tag as a VLAN and untags it.
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+ */
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+ if (skb_vlan_tag_present(skb) && netdev_uses_dsa(netdev)) {
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+ unsigned int port = ntohs(skb->vlan_proto) & GENMASK(2, 0);
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- /* If the device is attached to a dsa switch, the special
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- * tag inserted in VLAN field by hw switch can * be offloaded
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- * by RX HW VLAN offload. Clear vlan info.
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- */
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- if (netdev_uses_dsa(netdev))
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- __vlan_hwaccel_clear_tag(skb);
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+ if (port < ARRAY_SIZE(eth->dsa_meta) &&
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+ eth->dsa_meta[port])
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+ skb_dst_set_noref(skb, ð->dsa_meta[port]->dst);
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+
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+ __vlan_hwaccel_clear_tag(skb);
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}
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skb_record_rx_queue(skb, 0);
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@@ -2799,15 +2806,30 @@ static netdev_features_t mtk_fix_feature
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static int mtk_set_features(struct net_device *dev, netdev_features_t features)
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{
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- int err = 0;
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+ struct mtk_mac *mac = netdev_priv(dev);
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+ struct mtk_eth *eth = mac->hw;
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+ netdev_features_t diff = dev->features ^ features;
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+ int i;
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+
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+ if ((diff & NETIF_F_LRO) && !(features & NETIF_F_LRO))
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+ mtk_hwlro_netdev_disable(dev);
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- if (!((dev->features ^ features) & NETIF_F_LRO))
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+ /* Set RX VLAN offloading */
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+ if (!(diff & NETIF_F_HW_VLAN_CTAG_RX))
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return 0;
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- if (!(features & NETIF_F_LRO))
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- mtk_hwlro_netdev_disable(dev);
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+ mtk_w32(eth, !!(features & NETIF_F_HW_VLAN_CTAG_RX),
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+ MTK_CDMP_EG_CTRL);
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- return err;
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+ /* sync features with other MAC */
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+ for (i = 0; i < MTK_MAC_COUNT; i++) {
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+ if (!eth->netdev[i] || eth->netdev[i] == dev)
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+ continue;
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+ eth->netdev[i]->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
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+ eth->netdev[i]->features |= features & NETIF_F_HW_VLAN_CTAG_RX;
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+ }
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+
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+ return 0;
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}
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/* wait for DMA to finish whatever it is doing before we start using it again */
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@@ -3104,11 +3126,45 @@ found:
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return NOTIFY_DONE;
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}
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+static bool mtk_uses_dsa(struct net_device *dev)
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+{
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+#if IS_ENABLED(CONFIG_NET_DSA)
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+ return netdev_uses_dsa(dev) &&
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+ dev->dsa_ptr->tag_ops->proto == DSA_TAG_PROTO_MTK;
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+#else
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+ return false;
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+#endif
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+}
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+
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static int mtk_open(struct net_device *dev)
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{
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struct mtk_mac *mac = netdev_priv(dev);
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struct mtk_eth *eth = mac->hw;
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- int err;
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+ int i, err;
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+
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+ if (mtk_uses_dsa(dev) && !eth->prog) {
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+ for (i = 0; i < ARRAY_SIZE(eth->dsa_meta); i++) {
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+ struct metadata_dst *md_dst = eth->dsa_meta[i];
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+
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+ if (md_dst)
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+ continue;
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+
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+ md_dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX,
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+ GFP_KERNEL);
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+ if (!md_dst)
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+ return -ENOMEM;
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+
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+ md_dst->u.port_info.port_id = i;
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+ eth->dsa_meta[i] = md_dst;
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+ }
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+ } else {
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+ /* Hardware special tag parsing needs to be disabled if at least
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+ * one MAC does not use DSA.
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+ */
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+ u32 val = mtk_r32(eth, MTK_CDMP_IG_CTRL);
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+ val &= ~MTK_CDMP_STAG_EN;
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+ mtk_w32(eth, val, MTK_CDMP_IG_CTRL);
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+ }
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err = phylink_of_phy_connect(mac->phylink, mac->of_node, 0);
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if (err) {
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@@ -3631,6 +3687,10 @@ static int mtk_hw_init(struct mtk_eth *e
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*/
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val = mtk_r32(eth, MTK_CDMQ_IG_CTRL);
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mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL);
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+ if (!MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
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+ val = mtk_r32(eth, MTK_CDMP_IG_CTRL);
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+ mtk_w32(eth, val | MTK_CDMP_STAG_EN, MTK_CDMP_IG_CTRL);
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+ }
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/* Enable RX VLan Offloading */
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mtk_w32(eth, 1, MTK_CDMP_EG_CTRL);
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@@ -3864,6 +3924,12 @@ static int mtk_free_dev(struct mtk_eth *
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free_netdev(eth->netdev[i]);
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}
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+ for (i = 0; i < ARRAY_SIZE(eth->dsa_meta); i++) {
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+ if (!eth->dsa_meta[i])
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+ break;
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+ metadata_dst_free(eth->dsa_meta[i]);
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+ }
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+
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return 0;
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}
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
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@@ -22,6 +22,9 @@
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#include <linux/bpf_trace.h>
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#include "mtk_ppe.h"
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+#define MTK_MAX_DSA_PORTS 7
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+#define MTK_DSA_PORT_MASK GENMASK(2, 0)
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+
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#define MTK_QDMA_NUM_QUEUES 16
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#define MTK_QDMA_PAGE_SIZE 2048
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#define MTK_MAX_RX_LENGTH 1536
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@@ -105,6 +108,9 @@
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#define MTK_CDMQ_IG_CTRL 0x1400
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#define MTK_CDMQ_STAG_EN BIT(0)
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+/* CDMQ Exgress Control Register */
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+#define MTK_CDMQ_EG_CTRL 0x1404
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+
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/* CDMP Ingress Control Register */
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#define MTK_CDMP_IG_CTRL 0x400
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#define MTK_CDMP_STAG_EN BIT(0)
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@@ -1165,6 +1171,8 @@ struct mtk_eth {
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int ip_align;
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+ struct metadata_dst *dsa_meta[MTK_MAX_DSA_PORTS];
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+
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struct mtk_ppe *ppe[2];
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struct rhashtable flow_table;
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