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net: dsa: mt7530: fix handling of 802.1X PAE frames

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802.1X PAE frames are link-local frames, therefore they must be trapped to
the CPU port. Currently, the MT753X switches treat 802.1X PAE frames as
regular multicast frames, therefore flooding them to user ports. To fix
this, set 802.1X PAE frames to be trapped to the CPU port(s).

Fixes: b8f126a8d5 ("net-next: dsa: add dsa support for Mediatek MT7530 switch")
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arınç ÜNAL 2023-08-13 13:59:17 +03:00 committed by David S. Miller
parent cfceccca01
commit e94b590abf
2 changed files with 6 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/net/dsa/mt7530.c
View file

@ -1006,6 +1006,10 @@ mt753x_trap_frames(struct mt7530_priv *priv)
mt7530_rmw(priv, MT753X_BPC, MT753X_BPDU_PORT_FW_MASK,
MT753X_BPDU_CPU_ONLY);
/* Trap 802.1X PAE frames to the CPU port(s) */
mt7530_rmw(priv, MT753X_BPC, MT753X_PAE_PORT_FW_MASK,
MT753X_PAE_PORT_FW(MT753X_BPDU_CPU_ONLY));
/* Trap LLDP frames with :0E MAC DA to the CPU port(s) */
mt7530_rmw(priv, MT753X_RGAC2, MT753X_R0E_PORT_FW_MASK,
MT753X_R0E_PORT_FW(MT753X_BPDU_CPU_ONLY));

2
drivers/net/dsa/mt7530.h
View file

@ -66,6 +66,8 @@ enum mt753x_id {
/* Registers for BPDU and PAE frame control*/
#define MT753X_BPC 0x24
#define MT753X_BPDU_PORT_FW_MASK GENMASK(2, 0)
#define MT753X_PAE_PORT_FW_MASK GENMASK(18, 16)
#define MT753X_PAE_PORT_FW(x) FIELD_PREP(MT753X_PAE_PORT_FW_MASK, x)
/* Register for :03 and :0E MAC DA frame control */
#define MT753X_RGAC2 0x2c