Commit b0ba357b authored by Christophe Leroy's avatar Christophe Leroy Committed by David S. Miller

net: fs_enet: make rx_copybreak value configurable

Measurement shows that on a MPC8xx running at 132MHz, the optimal
limit is 112:
* 114 bytes packets are processed in 147 TB ticks with higher copybreak
* 114 bytes packets are processed in 148 TB ticks with lower copybreak
* 128 bytes packets are processed in 154 TB ticks with higher copybreak
* 128 bytes packets are processed in 148 TB ticks with lower copybreak
* 238 bytes packets are processed in 172 TB ticks with higher copybreak
* 238 bytes packets are processed in 148 TB ticks with lower copybreak

However it might be different on other processors
and/or frequencies. So it is useful to make it configurable.
Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 070e1f01
...@@ -830,6 +830,44 @@ static void fs_set_msglevel(struct net_device *dev, u32 value) ...@@ -830,6 +830,44 @@ static void fs_set_msglevel(struct net_device *dev, u32 value)
fep->msg_enable = value; fep->msg_enable = value;
} }
static int fs_get_tunable(struct net_device *dev,
const struct ethtool_tunable *tuna, void *data)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct fs_platform_info *fpi = fep->fpi;
int ret = 0;
switch (tuna->id) {
case ETHTOOL_RX_COPYBREAK:
*(u32 *)data = fpi->rx_copybreak;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int fs_set_tunable(struct net_device *dev,
const struct ethtool_tunable *tuna, const void *data)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct fs_platform_info *fpi = fep->fpi;
int ret = 0;
switch (tuna->id) {
case ETHTOOL_RX_COPYBREAK:
fpi->rx_copybreak = *(u32 *)data;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static const struct ethtool_ops fs_ethtool_ops = { static const struct ethtool_ops fs_ethtool_ops = {
.get_drvinfo = fs_get_drvinfo, .get_drvinfo = fs_get_drvinfo,
.get_regs_len = fs_get_regs_len, .get_regs_len = fs_get_regs_len,
...@@ -841,6 +879,8 @@ static const struct ethtool_ops fs_ethtool_ops = { ...@@ -841,6 +879,8 @@ static const struct ethtool_ops fs_ethtool_ops = {
.get_ts_info = ethtool_op_get_ts_info, .get_ts_info = ethtool_op_get_ts_info,
.get_link_ksettings = phy_ethtool_get_link_ksettings, .get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings, .set_link_ksettings = phy_ethtool_set_link_ksettings,
.get_tunable = fs_get_tunable,
.set_tunable = fs_set_tunable,
}; };
static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
......
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