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authorJonathan McDowell <noodles@earth.li>2020-07-18 19:32:14 +0300
committerDavid S. Miller <davem@davemloft.net>2020-07-21 04:34:16 +0300
commitf58d2598cf70d41f73e761b62a114d2e8f94a676 (patch)
treec49024937defd11aca193872ac3b8df017cabd8e /drivers/net/dsa
parent2b96692bcfcd2be7c9aa55dc13440213cd54c654 (diff)
downloadlinux-f58d2598cf70d41f73e761b62a114d2e8f94a676.tar.xz
net: dsa: qca8k: implement the port MTU callbacks
This switch has a single max frame size configuration register, so we track the requested MTU for each port and apply the largest. v2: - Address review feedback from Vladimir Oltean Signed-off-by: Jonathan McDowell <noodles@earth.li> Acked-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
-rw-r--r--drivers/net/dsa/qca8k.c31
-rw-r--r--drivers/net/dsa/qca8k.h3
2 files changed, 34 insertions, 0 deletions
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 4acad5fa0c84..a5566de82853 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -670,6 +670,11 @@ qca8k_setup(struct dsa_switch *ds)
}
}
+ /* Setup our port MTUs to match power on defaults */
+ for (i = 0; i < QCA8K_NUM_PORTS; i++)
+ priv->port_mtu[i] = ETH_FRAME_LEN + ETH_FCS_LEN;
+ qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, ETH_FRAME_LEN + ETH_FCS_LEN);
+
/* Flush the FDB table */
qca8k_fdb_flush(priv);
@@ -1099,6 +1104,30 @@ qca8k_port_disable(struct dsa_switch *ds, int port)
}
static int
+qca8k_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
+{
+ struct qca8k_priv *priv = ds->priv;
+ int i, mtu = 0;
+
+ priv->port_mtu[port] = new_mtu;
+
+ for (i = 0; i < QCA8K_NUM_PORTS; i++)
+ if (priv->port_mtu[port] > mtu)
+ mtu = priv->port_mtu[port];
+
+ /* Include L2 header / FCS length */
+ qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, mtu + ETH_HLEN + ETH_FCS_LEN);
+
+ return 0;
+}
+
+static int
+qca8k_port_max_mtu(struct dsa_switch *ds, int port)
+{
+ return QCA8K_MAX_MTU;
+}
+
+static int
qca8k_port_fdb_insert(struct qca8k_priv *priv, const u8 *addr,
u16 port_mask, u16 vid)
{
@@ -1174,6 +1203,8 @@ static const struct dsa_switch_ops qca8k_switch_ops = {
.set_mac_eee = qca8k_set_mac_eee,
.port_enable = qca8k_port_enable,
.port_disable = qca8k_port_disable,
+ .port_change_mtu = qca8k_port_change_mtu,
+ .port_max_mtu = qca8k_port_max_mtu,
.port_stp_state_set = qca8k_port_stp_state_set,
.port_bridge_join = qca8k_port_bridge_join,
.port_bridge_leave = qca8k_port_bridge_leave,
diff --git a/drivers/net/dsa/qca8k.h b/drivers/net/dsa/qca8k.h
index 10ef2bca2cde..31439396401c 100644
--- a/drivers/net/dsa/qca8k.h
+++ b/drivers/net/dsa/qca8k.h
@@ -13,6 +13,7 @@
#include <linux/gpio.h>
#define QCA8K_NUM_PORTS 7
+#define QCA8K_MAX_MTU 9000
#define PHY_ID_QCA8337 0x004dd036
#define QCA8K_ID_QCA8337 0x13
@@ -58,6 +59,7 @@
#define QCA8K_MDIO_MASTER_MAX_REG 32
#define QCA8K_GOL_MAC_ADDR0 0x60
#define QCA8K_GOL_MAC_ADDR1 0x64
+#define QCA8K_MAX_FRAME_SIZE 0x78
#define QCA8K_REG_PORT_STATUS(_i) (0x07c + (_i) * 4)
#define QCA8K_PORT_STATUS_SPEED GENMASK(1, 0)
#define QCA8K_PORT_STATUS_SPEED_10 0
@@ -189,6 +191,7 @@ struct qca8k_priv {
struct device *dev;
struct dsa_switch_ops ops;
struct gpio_desc *reset_gpio;
+ unsigned int port_mtu[QCA8K_NUM_PORTS];
};
struct qca8k_mib_desc {