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-rw-r--r--target/linux/generic/backport-5.4/745-v5.7-net-dsa-mt7530-add-support-for-port-mirroring.patch123
1 files changed, 123 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/745-v5.7-net-dsa-mt7530-add-support-for-port-mirroring.patch b/target/linux/generic/backport-5.4/745-v5.7-net-dsa-mt7530-add-support-for-port-mirroring.patch
new file mode 100644
index 0000000000..39e351e279
--- /dev/null
+++ b/target/linux/generic/backport-5.4/745-v5.7-net-dsa-mt7530-add-support-for-port-mirroring.patch
@@ -0,0 +1,123 @@
+From 37feab6076aa816ed72fe836759a485353241916 Mon Sep 17 00:00:00 2001
+From: DENG Qingfang <dqfext@gmail.com>
+Date: Fri, 6 Mar 2020 20:35:35 +0800
+Subject: net: dsa: mt7530: add support for port mirroring
+
+Add support for configuring port mirroring through the cls_matchall
+classifier. We do a full ingress and/or egress capture towards a
+capture port.
+MT7530 supports one monitor port and multiple mirrored ports.
+
+Signed-off-by: DENG Qingfang <dqfext@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/mt7530.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++
+ drivers/net/dsa/mt7530.h | 7 ++++++
+ 2 files changed, 67 insertions(+)
+
+--- a/drivers/net/dsa/mt7530.c
++++ b/drivers/net/dsa/mt7530.c
+@@ -1222,6 +1222,64 @@ mt7530_port_vlan_del(struct dsa_switch *ds, int port,
+ return 0;
+ }
+
++static int mt7530_port_mirror_add(struct dsa_switch *ds, int port,
++ struct dsa_mall_mirror_tc_entry *mirror,
++ bool ingress)
++{
++ struct mt7530_priv *priv = ds->priv;
++ u32 val;
++
++ /* Check for existent entry */
++ if ((ingress ? priv->mirror_rx : priv->mirror_tx) & BIT(port))
++ return -EEXIST;
++
++ val = mt7530_read(priv, MT7530_MFC);
++
++ /* MT7530 only supports one monitor port */
++ if (val & MIRROR_EN && MIRROR_PORT(val) != mirror->to_local_port)
++ return -EEXIST;
++
++ val |= MIRROR_EN;
++ val &= ~MIRROR_MASK;
++ val |= mirror->to_local_port;
++ mt7530_write(priv, MT7530_MFC, val);
++
++ val = mt7530_read(priv, MT7530_PCR_P(port));
++ if (ingress) {
++ val |= PORT_RX_MIR;
++ priv->mirror_rx |= BIT(port);
++ } else {
++ val |= PORT_TX_MIR;
++ priv->mirror_tx |= BIT(port);
++ }
++ mt7530_write(priv, MT7530_PCR_P(port), val);
++
++ return 0;
++}
++
++static void mt7530_port_mirror_del(struct dsa_switch *ds, int port,
++ struct dsa_mall_mirror_tc_entry *mirror)
++{
++ struct mt7530_priv *priv = ds->priv;
++ u32 val;
++
++ val = mt7530_read(priv, MT7530_PCR_P(port));
++ if (mirror->ingress) {
++ val &= ~PORT_RX_MIR;
++ priv->mirror_rx &= ~BIT(port);
++ } else {
++ val &= ~PORT_TX_MIR;
++ priv->mirror_tx &= ~BIT(port);
++ }
++ mt7530_write(priv, MT7530_PCR_P(port), val);
++
++ if (!priv->mirror_rx && !priv->mirror_tx) {
++ val = mt7530_read(priv, MT7530_MFC);
++ val &= ~MIRROR_EN;
++ mt7530_write(priv, MT7530_MFC, val);
++ }
++}
++
+ static enum dsa_tag_protocol
+ mtk_get_tag_protocol(struct dsa_switch *ds, int port,
+ enum dsa_tag_protocol mp)
+@@ -1613,6 +1671,8 @@ static const struct dsa_switch_ops mt7530_switch_ops = {
+ .port_vlan_prepare = mt7530_port_vlan_prepare,
+ .port_vlan_add = mt7530_port_vlan_add,
+ .port_vlan_del = mt7530_port_vlan_del,
++ .port_mirror_add = mt7530_port_mirror_add,
++ .port_mirror_del = mt7530_port_mirror_del,
+ .phylink_validate = mt7530_phylink_validate,
+ .phylink_mac_link_state = mt7530_phylink_mac_link_state,
+ .phylink_mac_config = mt7530_phylink_mac_config,
+--- a/drivers/net/dsa/mt7530.h
++++ b/drivers/net/dsa/mt7530.h
+@@ -36,6 +36,9 @@ enum {
+ #define CPU_EN BIT(7)
+ #define CPU_PORT(x) ((x) << 4)
+ #define CPU_MASK (0xf << 4)
++#define MIRROR_EN BIT(3)
++#define MIRROR_PORT(x) ((x) & 0x7)
++#define MIRROR_MASK 0x7
+
+ /* Registers for address table access */
+ #define MT7530_ATA1 0x74
+@@ -141,6 +144,8 @@ enum mt7530_stp_state {
+
+ /* Register for port control */
+ #define MT7530_PCR_P(x) (0x2004 + ((x) * 0x100))
++#define PORT_TX_MIR BIT(9)
++#define PORT_RX_MIR BIT(8)
+ #define PORT_VLAN(x) ((x) & 0x3)
+
+ enum mt7530_port_mode {
+@@ -460,6 +465,8 @@ struct mt7530_priv {
+ phy_interface_t p6_interface;
+ phy_interface_t p5_interface;
+ unsigned int p5_intf_sel;
++ u8 mirror_rx;
++ u8 mirror_tx;
+
+ struct mt7530_port ports[MT7530_NUM_PORTS];
+ /* protect among processes for registers access*/