From mboxrd@z Thu Jan 1 00:00:00 1970 From: Govindarajulu Varadarajan <_govind-KK0ffGbhmjU@public.gmane.org> Subject: Re: [net-next PATCH v2 3/3] drivers: net: cpsw: Add support for multicast/broadcast rate limit Date: Wed, 9 Jul 2014 19:09:58 +0530 (IST) Message-ID: References: <1404890050-4020-1-git-send-email-mugunthanvnm@ti.com> <1404890050-4020-4-git-send-email-mugunthanvnm@ti.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Mugunthan V N Return-path: In-Reply-To: <1404890050-4020-4-git-send-email-mugunthanvnm-l0cyMroinI0@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org On Wed, 9 Jul 2014, Mugunthan V N wrote: > Add support for multicast/broadcast rate limit feature via ethtool coalesce. > > Signed-off-by: Mugunthan V N > --- > drivers/net/ethernet/ti/cpsw.c | 80 ++++++++++++++++++++++++++++++++++++++++-- > 1 file changed, 78 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c > index a6117e6..2a984e6 100644 > --- a/drivers/net/ethernet/ti/cpsw.c > +++ b/drivers/net/ethernet/ti/cpsw.c > @@ -403,6 +403,8 @@ struct cpsw_priv { > bool irq_enabled; > struct cpts *cpts; > u32 emac_port; > + u32 rx_max_mcast; > + u32 rx_max_bcast; > }; > > struct cpsw_stats { > @@ -871,11 +873,13 @@ static int cpsw_get_coalesce(struct net_device *ndev, > struct cpsw_priv *priv = netdev_priv(ndev); > > coal->rx_coalesce_usecs = priv->coal_intvl; > + coal->rx_max_mcast = priv->rx_max_mcast; > + coal->rx_max_bcast = priv->rx_max_bcast; > return 0; > } > > -static int cpsw_set_coalesce(struct net_device *ndev, > - struct ethtool_coalesce *coal) > +static int cpsw_set_coalesce_usecs(struct net_device *ndev, > + struct ethtool_coalesce *coal) > { > struct cpsw_priv *priv = netdev_priv(ndev); > u32 int_ctrl; > @@ -933,6 +937,74 @@ static int cpsw_set_coalesce(struct net_device *ndev, > return 0; > } > > +static int cpsw_set_coalesce_mcast(struct net_device *ndev, > + struct ethtool_coalesce *coal) > +{ > + struct cpsw_priv *priv = netdev_priv(ndev); > + int port; > + > + priv->rx_max_mcast = coal->rx_max_mcast; > + > + if (priv->data.dual_emac) > + port = priv->emac_port; > + else > + port = priv->data.active_slave; > + > + cpsw_ale_control_set(priv->ale, port, ALE_PORT_MCAST_LIMIT, > + coal->rx_max_mcast); > + > + dev_dbg(priv->dev, "rx_max_mcast set to %d\n", priv->rx_max_mcast); > + return 0; > +} > + > +static int cpsw_set_coalesce_bcast(struct net_device *ndev, > + struct ethtool_coalesce *coal) > +{ > + struct cpsw_priv *priv = netdev_priv(ndev); > + int port; > + > + priv->rx_max_bcast = coal->rx_max_bcast; > + > + if (priv->data.dual_emac) > + port = priv->emac_port + 1; > + else > + port = priv->data.active_slave + 1; > + > + cpsw_ale_control_set(priv->ale, port, ALE_PORT_BCAST_LIMIT, > + coal->rx_max_bcast); Both cpsw_set_coalesce_bcast & cpsw_set_coalesce_mcast always return 0. May be you can return result of cpsw_ale_control_set()? > + > + dev_dbg(priv->dev, "rx_max_mcast set to %d\n", priv->rx_max_bcast); > + return 0; > +} > + > +static int cpsw_set_coalesce(struct net_device *ndev, > + struct ethtool_coalesce *coal) > +{ > + int ret = -EINVAL; > + > + if (coal->rx_coalesce_usecs) { > + ret = cpsw_set_coalesce_usecs(ndev, coal); > + if (ret) { > + dev_err(&ndev->dev, "set rx-usecs failed\n"); > + return ret; > + } > + } > + > + ret = cpsw_set_coalesce_mcast(ndev, coal); > + if (ret) { > + dev_err(&ndev->dev, "set coalesce rx-max-mcast failed\n"); > + return ret; > + } So that ret check here will be meaningful. thanks > + > + ret = cpsw_set_coalesce_bcast(ndev, coal); > + if (ret) { > + dev_err(&ndev->dev, "set coalesce rx-max-bcast failed\n"); > + return ret; > + } > + > + return ret; > +} > + > static int cpsw_get_sset_count(struct net_device *ndev, int sset) > { > switch (sset) { > @@ -1227,6 +1299,10 @@ static int cpsw_ndo_open(struct net_device *ndev) > /* enable statistics collection only on all ports */ > __raw_writel(0x7, &priv->regs->stat_port_en); > > + /* Enable rate limit feature in the switch for rx only */ > + cpsw_ale_control_set(priv->ale, 0, ALE_RATE_LIMIT, 1); > + cpsw_ale_control_set(priv->ale, 0, ALE_RATE_LIMIT_TX, 0); > + > if (WARN_ON(!priv->data.rx_descs)) > priv->data.rx_descs = 128; > > -- > 2.0.0.390.gcb682f8 > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >