diff options
| author | Jonathan McDowell <noodles@earth.li> | 2020-07-18 17:32:14 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-07-20 18:34:16 -0700 |
| commit | f58d2598cf70d41f73e761b62a114d2e8f94a676 (patch) | |
| tree | c49024937defd11aca193872ac3b8df017cabd8e /drivers/net | |
| parent | 2b96692bcfcd2be7c9aa55dc13440213cd54c654 (diff) | |
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')
| -rw-r--r-- | drivers/net/dsa/qca8k.c | 31 | ||||
| -rw-r--r-- | drivers/net/dsa/qca8k.h | 3 |
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 { |