diff options
| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2020-03-27 22:55:46 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-28 02:07:25 +0300 |
| commit | fb77ffc6ec866b41aba5a31b38eacd8829fd2eb0 (patch) | |
| tree | 07d944f9acf6794d12f1eada2dacc690d6855eee /drivers | |
| parent | c279c7261a834470a7b9f005993bf149ee594d85 (diff) | |
| download | linux-fb77ffc6ec866b41aba5a31b38eacd8829fd2eb0.tar.xz | |
net: dsa: vsc73xx: make the MTU configurable
Instead of hardcoding the MTU to the maximum value allowed by the
hardware, obey the value known by the operating system.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/dsa/vitesse-vsc73xx-core.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c index 6e21a2a5cf01..19ce4aa0973b 100644 --- a/drivers/net/dsa/vitesse-vsc73xx-core.c +++ b/drivers/net/dsa/vitesse-vsc73xx-core.c @@ -664,16 +664,6 @@ static void vsc73xx_init_port(struct vsc73xx *vsc, int port) VSC73XX_MAC_CFG_TX_EN | VSC73XX_MAC_CFG_RX_EN); - /* Max length, we can do up to 9.6 KiB, so allow that. - * According to application not "VSC7398 Jumbo Frames" setting - * up the MTU to 9.6 KB does not affect the performance on standard - * frames, so just enable it. It is clear from the application note - * that "9.6 kilobytes" == 9600 bytes. - */ - vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, - port, - VSC73XX_MAXLEN, 9600); - /* Flow control for the CPU port: * Use a zero delay pause frame when pause condition is left * Obey pause control frames @@ -1030,6 +1020,24 @@ static void vsc73xx_get_ethtool_stats(struct dsa_switch *ds, int port, } } +static int vsc73xx_change_mtu(struct dsa_switch *ds, int port, int new_mtu) +{ + struct vsc73xx *vsc = ds->priv; + + return vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, + VSC73XX_MAXLEN, new_mtu); +} + +/* According to application not "VSC7398 Jumbo Frames" setting + * up the MTU to 9.6 KB does not affect the performance on standard + * frames. It is clear from the application note that + * "9.6 kilobytes" == 9600 bytes. + */ +static int vsc73xx_get_max_mtu(struct dsa_switch *ds, int port) +{ + return 9600; +} + static const struct dsa_switch_ops vsc73xx_ds_ops = { .get_tag_protocol = vsc73xx_get_tag_protocol, .setup = vsc73xx_setup, @@ -1041,6 +1049,8 @@ static const struct dsa_switch_ops vsc73xx_ds_ops = { .get_sset_count = vsc73xx_get_sset_count, .port_enable = vsc73xx_port_enable, .port_disable = vsc73xx_port_disable, + .port_change_mtu = vsc73xx_change_mtu, + .port_max_mtu = vsc73xx_get_max_mtu, }; static int vsc73xx_gpio_get(struct gpio_chip *chip, unsigned int offset) |