target/linux/generic/backport-6.6/790-34-v6.10-net-dsa-mt7530-fix-mirroring-frames-received-on-loca.patch

   1 From d4097ddef078a113643a6dcde01e99741f852adb Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Ar=C4=B1n=C3=A7=20=C3=9CNAL?= <arinc.unal@arinc9.com>
   3 Date: Sat, 13 Apr 2024 16:01:39 +0300
   4 Subject: [PATCH 2/5] net: dsa: mt7530: fix mirroring frames received on local
   5  port
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 This switch intellectual property provides a bit on the ARL global control
  11 register which controls allowing mirroring frames which are received on the
  12 local port (monitor port). This bit is unset after reset.
  13
  14 This ability must be enabled to fully support the port mirroring feature on
  15 this switch intellectual property.
  16
  17 Therefore, this patch fixes the traffic not being reflected on a port,
  18 which would be configured like below:
  19
  20   tc qdisc add dev swp0 clsact
  21
  22   tc filter add dev swp0 ingress matchall skip_sw \
  23   action mirred egress mirror dev swp0
  24
  25 As a side note, this configuration provides the hairpinning feature for a
  26 single port.
  27
  28 Fixes: 37feab6076aa ("net: dsa: mt7530: add support for port mirroring")
  29 Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
  30 Signed-off-by: David S. Miller <davem@davemloft.net>
  31 ---
  32  drivers/net/dsa/mt7530.c | 6 ++++++
  33  drivers/net/dsa/mt7530.h | 4 ++++
  34  2 files changed, 10 insertions(+)
  35
  36 --- a/drivers/net/dsa/mt7530.c
  37 +++ b/drivers/net/dsa/mt7530.c
  38 @@ -2480,6 +2480,9 @@ mt7530_setup(struct dsa_switch *ds)
  39                            PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT));
  40         }
  41
  42 +       /* Allow mirroring frames received on the local port (monitor port). */
  43 +       mt7530_set(priv, MT753X_AGC, LOCAL_EN);
  44 +
  45         /* Setup VLAN ID 0 for VLAN-unaware bridges */
  46         ret = mt7530_setup_vlan0(priv);
  47         if (ret)
  48 @@ -2591,6 +2594,9 @@ mt7531_setup_common(struct dsa_switch *d
  49                            PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT));
  50         }
  51
  52 +       /* Allow mirroring frames received on the local port (monitor port). */
  53 +       mt7530_set(priv, MT753X_AGC, LOCAL_EN);
  54 +
  55         /* Flush the FDB table */
  56         ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, NULL);
  57         if (ret < 0)
  58 --- a/drivers/net/dsa/mt7530.h
  59 +++ b/drivers/net/dsa/mt7530.h
  60 @@ -32,6 +32,10 @@ enum mt753x_id {
  61  #define SYSC_REG_RSTCTRL               0x34
  62  #define  RESET_MCM                     BIT(2)
  63
  64 +/* Register for ARL global control */
  65 +#define MT753X_AGC                     0xc
  66 +#define  LOCAL_EN                      BIT(7)
  67 +
  68  /* Registers to mac forward control for unknown frames */
  69  #define MT7530_MFC                     0x10
  70  #define  BC_FFP(x)                     (((x) & 0xff) << 24)