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Commit 8585661b authored by WingMan Kwok's avatar WingMan Kwok Committed by David S. Miller
Browse files

net: netcp: ethss: k2g: add promiscuous mode support 



This patch adds support for promiscuous mode in k2g's network
driver. When upper layer instructs to transition from
non-promiscuous mode to promiscuous mode or vice versa
K2G network driver needs to configure ALE accordingly
so that in case of non-promiscuous mode, ALE will not flood
all unicast packets to host port, while in promiscuous
mode, it will pass all received unicast packets to
host port.

Signed-off-by: default avatarWingMan Kwok <w-kwok2@ti.com>
Signed-off-by: default avatarMurali Karicheri <m-karicheri2@ti.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0542a87c

drivers/net/ethernet/ti/netcp_ethss.c

+56 −0
Original line number Original line Diff line number Diff line
@@ -2775,6 +2775,61 @@ static inline int gbe_hwtstamp_set(struct gbe_intf *gbe_intf, struct ifreq *req) 
}

}

#endif /* CONFIG_TI_CPTS */

#endif /* CONFIG_TI_CPTS */





static int gbe_set_rx_mode(void *intf_priv, bool promisc)

{

	struct gbe_intf *gbe_intf = intf_priv;

	struct gbe_priv *gbe_dev = gbe_intf->gbe_dev;

	struct cpsw_ale *ale = gbe_dev->ale;

	unsigned long timeout;

	int i, ret = -ETIMEDOUT;



	/* Disable(1)/Enable(0) Learn for all ports (host is port 0 and

	 * slaves are port 1 and up

	 */

	for (i = 0; i <= gbe_dev->num_slaves; i++) {

		cpsw_ale_control_set(ale, i,

				     ALE_PORT_NOLEARN, !!promisc);

		cpsw_ale_control_set(ale, i,

				     ALE_PORT_NO_SA_UPDATE, !!promisc);

	}



	if (!promisc) {

		/* Don't Flood All Unicast Packets to Host port */

		cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0);

		dev_vdbg(gbe_dev->dev, "promiscuous mode disabled\n");

		return 0;

	}



	timeout = jiffies + HZ;



	/* Clear All Untouched entries */

	cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);

	do {

		cpu_relax();

		if (cpsw_ale_control_get(ale, 0, ALE_AGEOUT)) {

			ret = 0;

			break;

		}



	} while (time_after(timeout, jiffies));



	/* Make sure it is not a false timeout */

	if (ret && !cpsw_ale_control_get(ale, 0, ALE_AGEOUT))

		return ret;



	cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);



	/* Clear all mcast from ALE */

	cpsw_ale_flush_multicast(ale,

				 GBE_PORT_MASK(gbe_dev->ale_ports),

				 -1);



	/* Flood All Unicast Packets to Host port */

	cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1);

	dev_vdbg(gbe_dev->dev, "promiscuous mode enabled\n");

	return ret;

}



static int gbe_ioctl(void *intf_priv, struct ifreq *req, int cmd)

static int gbe_ioctl(void *intf_priv, struct ifreq *req, int cmd)

{

{

	struct gbe_intf *gbe_intf = intf_priv;

	struct gbe_intf *gbe_intf = intf_priv;
@@ -3529,6 +3584,7 @@ static int gbe_probe(struct netcp_device *netcp_device, struct device *dev, 
		gbe_dev->max_num_slaves = 8;

		gbe_dev->max_num_slaves = 8;

	} else if (of_device_is_compatible(node, "ti,netcp-gbe-2")) {

	} else if (of_device_is_compatible(node, "ti,netcp-gbe-2")) {

		gbe_dev->max_num_slaves = 1;

		gbe_dev->max_num_slaves = 1;

		gbe_module.set_rx_mode = gbe_set_rx_mode;

	} else if (of_device_is_compatible(node, "ti,netcp-xgbe")) {

	} else if (of_device_is_compatible(node, "ti,netcp-xgbe")) {

		gbe_dev->max_num_slaves = 2;

		gbe_dev->max_num_slaves = 2;

	} else {

	} else {