diff options
| author | Dai Haruki <dai.haruki@freescale.com> | 2008-12-17 00:29:52 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-12-17 00:29:52 +0100 |
| commit | b46a8454cd304b5376ba00d3457a612720e47269 (patch) | |
| tree | cf6a119d3903b519b9540585684ba1eb2ef130d6 /drivers/net/gianfar_ethtool.c | |
| parent | gianfar: Convert gianfar to an of_platform_driver (diff) | |
| download | linux-b46a8454cd304b5376ba00d3457a612720e47269.tar.xz linux-b46a8454cd304b5376ba00d3457a612720e47269.zip | |
gianfar: Optimize interrupt coalescing configuration
Store the interrupt coalescing values in the form in which they will be
written to the interrupt coalescing registers. This puts a little overhead
into the ethtool configuration, and takes it out of the interrupt handler
Signed-off-by: Dai Haruki <dai.haruki@freescale.com>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/gianfar_ethtool.c')
| -rw-r--r-- | drivers/net/gianfar_ethtool.c | 42 |
1 files changed, 24 insertions, 18 deletions
diff --git a/drivers/net/gianfar_ethtool.c b/drivers/net/gianfar_ethtool.c index 53944b120a3d..c111c532f7b3 100644 --- a/drivers/net/gianfar_ethtool.c +++ b/drivers/net/gianfar_ethtool.c @@ -201,8 +201,8 @@ static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd) if (NULL == phydev) return -ENODEV; - cmd->maxtxpkt = priv->txcount; - cmd->maxrxpkt = priv->rxcount; + cmd->maxtxpkt = get_icft_value(priv->txic); + cmd->maxrxpkt = get_icft_value(priv->rxic); return phy_ethtool_gset(phydev, cmd); } @@ -279,6 +279,10 @@ static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int tic static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals) { struct gfar_private *priv = netdev_priv(dev); + unsigned long rxtime; + unsigned long rxcount; + unsigned long txtime; + unsigned long txcount; if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE)) return -EOPNOTSUPP; @@ -286,11 +290,15 @@ static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals if (NULL == priv->phydev) return -ENODEV; - cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime); - cvals->rx_max_coalesced_frames = priv->rxcount; + rxtime = get_ictt_value(priv->rxic); + rxcount = get_icft_value(priv->rxic); + txtime = get_ictt_value(priv->txic); + txcount = get_icft_value(priv->txic);; + cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, rxtime); + cvals->rx_max_coalesced_frames = rxcount; - cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime); - cvals->tx_max_coalesced_frames = priv->txcount; + cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, txtime); + cvals->tx_max_coalesced_frames = txcount; cvals->use_adaptive_rx_coalesce = 0; cvals->use_adaptive_tx_coalesce = 0; @@ -358,8 +366,9 @@ static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals return -EINVAL; } - priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs); - priv->rxcount = cvals->rx_max_coalesced_frames; + priv->rxic = mk_ic_value( + gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs), + cvals->rx_max_coalesced_frames); /* Set up tx coalescing */ if ((cvals->tx_coalesce_usecs == 0) || @@ -381,20 +390,17 @@ static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals return -EINVAL; } - priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs); - priv->txcount = cvals->tx_max_coalesced_frames; + priv->txic = mk_ic_value( + gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs), + cvals->tx_max_coalesced_frames); + gfar_write(&priv->regs->rxic, 0); if (priv->rxcoalescing) - gfar_write(&priv->regs->rxic, - mk_ic_value(priv->rxcount, priv->rxtime)); - else - gfar_write(&priv->regs->rxic, 0); + gfar_write(&priv->regs->rxic, priv->rxic); + gfar_write(&priv->regs->txic, 0); if (priv->txcoalescing) - gfar_write(&priv->regs->txic, - mk_ic_value(priv->txcount, priv->txtime)); - else - gfar_write(&priv->regs->txic, 0); + gfar_write(&priv->regs->txic, priv->txic); return 0; } |