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Date: Wed, 9 Nov 2022 17:34:23 +0100 From: Felix Fietkau <nbd@....name> To: netdev@...r.kernel.org, John Crispin <john@...ozen.org>, Sean Wang <sean.wang@...iatek.com>, Mark Lee <Mark-MC.Lee@...iatek.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Matthias Brugger <matthias.bgg@...il.com>, Russell King <linux@...linux.org.uk> Cc: Vladimir Oltean <olteanv@...il.com>, linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH net-next v2 09/12] net: ethernet: mtk_eth_soc: fix VLAN rx hardware acceleration - enable VLAN untagging for PDMA rx - make it possible to disable the feature via ethtool - pass VLAN tag to the DSA driver - untag special tag on PDMA only if no non-DSA devices are in use - disable special tag untagging on 7986 for now, since it's not working yet Signed-off-by: Felix Fietkau <nbd@....name> --- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 99 ++++++++++++++++----- drivers/net/ethernet/mediatek/mtk_eth_soc.h | 8 ++ 2 files changed, 84 insertions(+), 23 deletions(-) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index 92bdd69eed2e..ffaa9fe32b14 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -23,6 +23,7 @@ #include <linux/jhash.h> #include <linux/bitfield.h> #include <net/dsa.h> +#include <net/dst_metadata.h> #include "mtk_eth_soc.h" #include "mtk_wed.h" @@ -2008,23 +2009,27 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget, if (reason == MTK_PPE_CPU_REASON_HIT_UNBIND_RATE_REACHED) mtk_ppe_check_skb(eth->ppe[0], skb, hash); - if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) { - if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) { - if (trxd.rxd3 & RX_DMA_VTAG_V2) - __vlan_hwaccel_put_tag(skb, - htons(RX_DMA_VPID(trxd.rxd4)), - RX_DMA_VID(trxd.rxd4)); - } else if (trxd.rxd2 & RX_DMA_VTAG) { - __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), - RX_DMA_VID(trxd.rxd3)); - } + if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) { + if (trxd.rxd3 & RX_DMA_VTAG_V2) + __vlan_hwaccel_put_tag(skb, + htons(RX_DMA_VPID(trxd.rxd4)), + RX_DMA_VID(trxd.rxd4)); + } else if (trxd.rxd2 & RX_DMA_VTAG) { + __vlan_hwaccel_put_tag(skb, htons(RX_DMA_VPID(trxd.rxd3)), + RX_DMA_VID(trxd.rxd3)); + } + + /* When using VLAN untagging in combination with DSA, the + * hardware treats the MTK special tag as a VLAN and untags it. + */ + if (skb_vlan_tag_present(skb) && netdev_uses_dsa(netdev)) { + unsigned int port = ntohs(skb->vlan_proto) & GENMASK(2, 0); + + if (port < ARRAY_SIZE(eth->dsa_meta) && + eth->dsa_meta[port]) + skb_dst_set_noref(skb, ð->dsa_meta[port]->dst); - /* If the device is attached to a dsa switch, the special - * tag inserted in VLAN field by hw switch can * be offloaded - * by RX HW VLAN offload. Clear vlan info. - */ - if (netdev_uses_dsa(netdev)) - __vlan_hwaccel_clear_tag(skb); + __vlan_hwaccel_clear_tag(skb); } skb_record_rx_queue(skb, 0); @@ -2847,15 +2852,19 @@ static netdev_features_t mtk_fix_features(struct net_device *dev, static int mtk_set_features(struct net_device *dev, netdev_features_t features) { - int err = 0; - - if (!((dev->features ^ features) & NETIF_F_LRO)) - return 0; + struct mtk_mac *mac = netdev_priv(dev); + struct mtk_eth *eth = mac->hw; + netdev_features_t diff = dev->features ^ features; - if (!(features & NETIF_F_LRO)) + if ((diff & NETIF_F_LRO) && !(features & NETIF_F_LRO)) mtk_hwlro_netdev_disable(dev); - return err; + /* Set RX VLAN offloading */ + if (diff & NETIF_F_HW_VLAN_CTAG_RX) + mtk_w32(eth, !!(features & NETIF_F_HW_VLAN_CTAG_RX), + MTK_CDMP_EG_CTRL); + + return 0; } /* wait for DMA to finish whatever it is doing before we start using it again */ @@ -3137,11 +3146,45 @@ static int mtk_device_event(struct notifier_block *n, unsigned long event, void return NOTIFY_DONE; } +static bool mtk_uses_dsa(struct net_device *dev) +{ +#if IS_ENABLED(CONFIG_NET_DSA) + return netdev_uses_dsa(dev) && + dev->dsa_ptr->tag_ops->proto == DSA_TAG_PROTO_MTK; +#else + return false; +#endif +} + static int mtk_open(struct net_device *dev) { struct mtk_mac *mac = netdev_priv(dev); struct mtk_eth *eth = mac->hw; - int err; + int i, err; + + if (mtk_uses_dsa(dev)) { + for (i = 0; i < ARRAY_SIZE(eth->dsa_meta); i++) { + struct metadata_dst *md_dst = eth->dsa_meta[i]; + + if (md_dst) + continue; + + md_dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX, + GFP_KERNEL); + if (!md_dst) + return -ENOMEM; + + md_dst->u.port_info.port_id = i; + eth->dsa_meta[i] = md_dst; + } + } else { + /* Hardware special tag parsing needs to be disabled if at least + * one MAC does not use DSA. + */ + u32 val = mtk_r32(eth, MTK_CDMP_IG_CTRL); + val &= ~MTK_CDMP_STAG_EN; + mtk_w32(eth, val, MTK_CDMP_IG_CTRL); + } err = phylink_of_phy_connect(mac->phylink, mac->of_node, 0); if (err) { @@ -3469,6 +3512,10 @@ static int mtk_hw_init(struct mtk_eth *eth) */ val = mtk_r32(eth, MTK_CDMQ_IG_CTRL); mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL); + if (!MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) { + val = mtk_r32(eth, MTK_CDMP_IG_CTRL); + mtk_w32(eth, val | MTK_CDMP_STAG_EN, MTK_CDMP_IG_CTRL); + } /* Enable RX VLan Offloading */ mtk_w32(eth, 1, MTK_CDMP_EG_CTRL); @@ -3686,6 +3733,12 @@ static int mtk_free_dev(struct mtk_eth *eth) free_netdev(eth->netdev[i]); } + for (i = 0; i < ARRAY_SIZE(eth->dsa_meta); i++) { + if (!eth->dsa_meta[i]) + break; + metadata_dst_free(eth->dsa_meta[i]); + } + return 0; } diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h index 146437ca044b..1c85fbad5bc1 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -22,6 +22,9 @@ #include <linux/bpf_trace.h> #include "mtk_ppe.h" +#define MTK_MAX_DSA_PORTS 7 +#define MTK_DSA_PORT_MASK GENMASK(2, 0) + #define MTK_QDMA_NUM_QUEUES 16 #define MTK_QDMA_PAGE_SIZE 2048 #define MTK_MAX_RX_LENGTH 1536 @@ -93,6 +96,9 @@ #define MTK_CDMQ_IG_CTRL 0x1400 #define MTK_CDMQ_STAG_EN BIT(0) +/* CDMQ Exgress Control Register */ +#define MTK_CDMQ_EG_CTRL 0x1404 + /* CDMP Ingress Control Register */ #define MTK_CDMP_IG_CTRL 0x400 #define MTK_CDMP_STAG_EN BIT(0) @@ -1149,6 +1155,8 @@ struct mtk_eth { int ip_align; + struct metadata_dst *dsa_meta[MTK_MAX_DSA_PORTS]; + struct mtk_ppe *ppe[2]; struct rhashtable flow_table; -- 2.38.1
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