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Subject[PATCH net-next 6/8] net: dsa: microchip: add support for port mirror operations
Date
Added support for port_mirror_add() and port_mirror_del operations

Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
---
drivers/net/dsa/microchip/lan937x_main.c | 42 ++++++++++++++++++++++++
1 file changed, 42 insertions(+)

diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
index 5693c59df497..aa2efa4e5823 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -162,6 +162,46 @@ static void lan937x_port_stp_state_set(struct dsa_switch *ds, int port,
mutex_unlock(&dev->dev_mutex);
}

+static int lan937x_port_mirror_add(struct dsa_switch *ds, int port,
+ struct dsa_mall_mirror_tc_entry *mirror,
+ bool ingress)
+{
+ struct ksz_device *dev = ds->priv;
+
+ if (ingress)
+ lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, true);
+ else
+ lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, true);
+
+ lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_SNIFFER, false);
+
+ /* configure mirror port */
+ lan937x_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
+ PORT_MIRROR_SNIFFER, true);
+
+ lan937x_cfg(dev, S_MIRROR_CTRL, SW_MIRROR_RX_TX, false);
+
+ return 0;
+}
+
+static void lan937x_port_mirror_del(struct dsa_switch *ds, int port,
+ struct dsa_mall_mirror_tc_entry *mirror)
+{
+ struct ksz_device *dev = ds->priv;
+ u8 data;
+
+ if (mirror->ingress)
+ lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, false);
+ else
+ lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, false);
+
+ lan937x_pread8(dev, port, P_MIRROR_CTRL, &data);
+
+ if (!(data & (PORT_MIRROR_RX | PORT_MIRROR_TX)))
+ lan937x_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
+ PORT_MIRROR_SNIFFER, false);
+}
+
static phy_interface_t lan937x_get_interface(struct ksz_device *dev, int port)
{
phy_interface_t interface;
@@ -393,6 +433,8 @@ const struct dsa_switch_ops lan937x_switch_ops = {
.port_bridge_leave = ksz_port_bridge_leave,
.port_stp_state_set = lan937x_port_stp_state_set,
.port_fast_age = ksz_port_fast_age,
+ .port_mirror_add = lan937x_port_mirror_add,
+ .port_mirror_del = lan937x_port_mirror_del,
.port_max_mtu = lan937x_get_max_mtu,
.port_change_mtu = lan937x_change_mtu,
.phylink_validate = lan937x_phylink_validate,
--
2.25.1
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