From 8fbebef80107d779b8e356cf60323454a4099d76 Mon Sep 17 00:00:00 2001 From: DENG Qingfang Date: Fri, 6 Aug 2021 11:47:11 +0800 Subject: [PATCH] net: dsa: mt7530: drop untagged frames on VLAN-aware ports without PVID The driver currently still accepts untagged frames on VLAN-aware ports without PVID. Use PVC.ACC_FRM to drop untagged frames in that case. Signed-off-by: DENG Qingfang Signed-off-by: David S. Miller --- drivers/net/dsa/mt7530.c | 32 ++++++++++++++++++++++++++++++-- drivers/net/dsa/mt7530.h | 7 +++++++ 2 files changed, 37 insertions(+), 2 deletions(-) diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index c5bfbd1..53e6150 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -1245,9 +1245,11 @@ mt7530_port_set_vlan_unaware(struct dsa_switch *ds, int port) mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK, MT7530_PORT_FALLBACK_MODE); - mt7530_rmw(priv, MT7530_PVC_P(port), VLAN_ATTR_MASK | PVC_EG_TAG_MASK, + mt7530_rmw(priv, MT7530_PVC_P(port), + VLAN_ATTR_MASK | PVC_EG_TAG_MASK | ACC_FRM_MASK, VLAN_ATTR(MT7530_VLAN_TRANSPARENT) | - PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT)); + PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT) | + MT7530_VLAN_ACC_ALL); /* Set PVID to 0 */ mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK, @@ -1285,6 +1287,11 @@ mt7530_port_set_vlan_aware(struct dsa_switch *ds, int port) MT7530_PORT_SECURITY_MODE); mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK, G0_PORT_VID(priv->ports[port].pvid)); + + /* Only accept tagged frames if PVID is not set */ + if (!priv->ports[port].pvid) + mt7530_rmw(priv, MT7530_PVC_P(port), ACC_FRM_MASK, + MT7530_VLAN_ACC_TAGGED); } /* Set the port as a user port which is to be able to recognize VID @@ -1612,11 +1619,26 @@ mt7530_port_vlan_add(struct dsa_switch *ds, int port, if (pvid) { priv->ports[port].pvid = vlan->vid; + /* Accept all frames if PVID is set */ + mt7530_rmw(priv, MT7530_PVC_P(port), ACC_FRM_MASK, + MT7530_VLAN_ACC_ALL); + /* Only configure PVID if VLAN filtering is enabled */ if (dsa_port_is_vlan_filtering(dsa_to_port(ds, port))) mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK, G0_PORT_VID(vlan->vid)); + } else if (vlan->vid && priv->ports[port].pvid == vlan->vid) { + /* This VLAN is overwritten without PVID, so unset it */ + priv->ports[port].pvid = G0_PORT_VID_DEF; + + /* Only accept tagged frames if the port is VLAN-aware */ + if (dsa_port_is_vlan_filtering(dsa_to_port(ds, port))) + mt7530_rmw(priv, MT7530_PVC_P(port), ACC_FRM_MASK, + MT7530_VLAN_ACC_TAGGED); + + mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK, + G0_PORT_VID_DEF); } mutex_unlock(&priv->reg_mutex); @@ -1642,6 +1664,12 @@ mt7530_port_vlan_del(struct dsa_switch *ds, int port, */ if (priv->ports[port].pvid == vlan->vid) { priv->ports[port].pvid = G0_PORT_VID_DEF; + + /* Only accept tagged frames if the port is VLAN-aware */ + if (dsa_port_is_vlan_filtering(dsa_to_port(ds, port))) + mt7530_rmw(priv, MT7530_PVC_P(port), ACC_FRM_MASK, + MT7530_VLAN_ACC_TAGGED); + mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK, G0_PORT_VID_DEF); } diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h index 4a91d80..fe4cd2a 100644 --- a/drivers/net/dsa/mt7530.h +++ b/drivers/net/dsa/mt7530.h @@ -238,6 +238,7 @@ enum mt7530_port_mode { #define PVC_EG_TAG_MASK PVC_EG_TAG(7) #define VLAN_ATTR(x) (((x) & 0x3) << 6) #define VLAN_ATTR_MASK VLAN_ATTR(3) +#define ACC_FRM_MASK GENMASK(1, 0) enum mt7530_vlan_port_eg_tag { MT7530_VLAN_EG_DISABLED = 0, @@ -249,6 +250,12 @@ enum mt7530_vlan_port_attr { MT7530_VLAN_TRANSPARENT = 3, }; +enum mt7530_vlan_port_acc_frm { + MT7530_VLAN_ACC_ALL = 0, + MT7530_VLAN_ACC_TAGGED = 1, + MT7530_VLAN_ACC_UNTAGGED = 2, +}; + #define STAG_VPID (((x) & 0xffff) << 16) /* Register for port port-and-protocol based vlan 1 control */ -- 2.7.4