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net: dsa: microchip: lan937x: add MTU and fast_age support

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This patch add the support for port_max_mtu, port_change_mtu and
port_fast_age dsa functionality.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arun Ramadoss 2022-07-01 20:39:54 +05:30 committed by David S. Miller
parent a50b35366c
commit ab8823688f
4 changed files with 36 additions and 0 deletions
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2
drivers/net/dsa/microchip/ksz_common.c
View File

@ -206,6 +206,7 @@ static const struct ksz_dev_ops lan937x_dev_ops = {
.setup = lan937x_setup,
.get_port_addr = ksz9477_get_port_addr,
.cfg_port_member = ksz9477_cfg_port_member,
.flush_dyn_mac_table = ksz9477_flush_dyn_mac_table,
.port_setup = lan937x_port_setup,
.r_phy = lan937x_r_phy,
.w_phy = lan937x_w_phy,
@ -224,6 +225,7 @@ static const struct ksz_dev_ops lan937x_dev_ops = {
.fdb_del = ksz9477_fdb_del,
.mdb_add = ksz9477_mdb_add,
.mdb_del = ksz9477_mdb_del,
.change_mtu = lan937x_change_mtu,
.max_mtu = ksz9477_max_mtu,
.config_cpu_port = lan937x_config_cpu_port,
.enable_stp_addr = ksz9477_enable_stp_addr,

1
drivers/net/dsa/microchip/lan937x.h
View File

@ -14,4 +14,5 @@ int lan937x_switch_init(struct ksz_device *dev);
void lan937x_switch_exit(struct ksz_device *dev);
void lan937x_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data);
void lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
int lan937x_change_mtu(struct ksz_device *dev, int port, int new_mtu);
#endif

28
drivers/net/dsa/microchip/lan937x_main.c
View File

@ -9,6 +9,7 @@
#include <linux/of_net.h>
#include <linux/of_mdio.h>
#include <linux/if_bridge.h>
#include <linux/if_vlan.h>
#include <linux/math.h>
#include <net/dsa.h>
#include <net/switchdev.h>
@ -284,6 +285,33 @@ void lan937x_config_cpu_port(struct dsa_switch *ds)
}
}
int lan937x_change_mtu(struct ksz_device *dev, int port, int new_mtu)
{
struct dsa_switch *ds = dev->ds;
int ret;
new_mtu += VLAN_ETH_HLEN + ETH_FCS_LEN;
if (dsa_is_cpu_port(ds, port))
new_mtu += LAN937X_TAG_LEN;
if (new_mtu >= FR_MIN_SIZE)
ret = lan937x_port_cfg(dev, port, REG_PORT_MAC_CTRL_0,
PORT_JUMBO_PACKET, true);
else
ret = lan937x_port_cfg(dev, port, REG_PORT_MAC_CTRL_0,
PORT_JUMBO_PACKET, false);
if (ret < 0) {
dev_err(ds->dev, "failed to enable jumbo\n");
return ret;
}
/* Write the frame size in PORT_MAX_FR_SIZE register */
ksz_pwrite16(dev, port, PORT_MAX_FR_SIZE, new_mtu);
return 0;
}
int lan937x_setup(struct dsa_switch *ds)
{
struct ksz_device *dev = ds->priv;

5
drivers/net/dsa/microchip/lan937x_reg.h
View File

@ -149,6 +149,9 @@
#define PORT_BACK_PRESSURE BIT(3)
#define PORT_PASS_ALL BIT(0)
#define PORT_MAX_FR_SIZE 0x404
#define FR_MIN_SIZE 1522
/* 8 - Classification and Policing */
#define REG_PORT_MRI_PRIO_CTRL 0x0801
#define PORT_HIGHEST_PRIO BIT(7)
@ -161,4 +164,6 @@
#define P_PRIO_CTRL REG_PORT_MRI_PRIO_CTRL
#define LAN937X_TAG_LEN 2
#endif