Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754790AbaGIHO3 (ORCPT ); Wed, 9 Jul 2014 03:14:29 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:40267 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754142AbaGIHO0 (ORCPT ); Wed, 9 Jul 2014 03:14:26 -0400 From: Mugunthan V N To: CC: , , , Mugunthan V N Subject: [net-next PATCH v2 3/3] drivers: net: cpsw: Add support for multicast/broadcast rate limit Date: Wed, 9 Jul 2014 12:44:10 +0530 Message-ID: <1404890050-4020-4-git-send-email-mugunthanvnm@ti.com> X-Mailer: git-send-email 2.0.0.390.gcb682f8 In-Reply-To: <1404890050-4020-1-git-send-email-mugunthanvnm@ti.com> References: <1404890050-4020-1-git-send-email-mugunthanvnm@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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); + + 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; + } + + 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 linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/