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authorBeniamino Galvani <b.galvani@gmail.com>2014-05-11 18:11:47 +0200
committerDavid S. Miller <davem@davemloft.net>2014-05-14 00:02:24 +0200
commit775dd682e2b0ec79fa346152c00870d4a3832a47 (patch)
tree23a7ad244374a73b6b97d7c9f6750bbef1961b07 /drivers/net/ethernet/arc
parentMerge branch 'tcp-fastopen-ipv6' (diff)
downloadlinux-775dd682e2b0ec79fa346152c00870d4a3832a47.tar.xz
linux-775dd682e2b0ec79fa346152c00870d4a3832a47.zip
arc_emac: implement promiscuous mode and multicast filtering
This patch implements the set_rx_mode function to enable/disable promiscuous or all-multicast modes and to update the multicast filtering list of the device. Signed-off-by: Beniamino Galvani <b.galvani@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/arc')
-rw-r--r--drivers/net/ethernet/arc/emac_main.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/net/ethernet/arc/emac_main.c b/drivers/net/ethernet/arc/emac_main.c
index d647a7d115ac..be090e68e1d1 100644
--- a/drivers/net/ethernet/arc/emac_main.c
+++ b/drivers/net/ethernet/arc/emac_main.c
@@ -13,6 +13,7 @@
* Vineet Gupta
*/
+#include <linux/crc32.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/io.h>
@@ -451,6 +452,41 @@ static int arc_emac_open(struct net_device *ndev)
}
/**
+ * arc_emac_set_rx_mode - Change the receive filtering mode.
+ * @ndev: Pointer to the network device.
+ *
+ * This function enables/disables promiscuous or all-multicast mode
+ * and updates the multicast filtering list of the network device.
+ */
+static void arc_emac_set_rx_mode(struct net_device *ndev)
+{
+ struct arc_emac_priv *priv = netdev_priv(ndev);
+
+ if (ndev->flags & IFF_PROMISC) {
+ arc_reg_or(priv, R_CTRL, PROM_MASK);
+ } else {
+ arc_reg_clr(priv, R_CTRL, PROM_MASK);
+
+ if (ndev->flags & IFF_ALLMULTI) {
+ arc_reg_set(priv, R_LAFL, ~0);
+ arc_reg_set(priv, R_LAFH, ~0);
+ } else {
+ struct netdev_hw_addr *ha;
+ unsigned int filter[2] = { 0, 0 };
+ int bit;
+
+ netdev_for_each_mc_addr(ha, ndev) {
+ bit = ether_crc_le(ETH_ALEN, ha->addr) >> 26;
+ filter[bit >> 5] |= 1 << (bit & 31);
+ }
+
+ arc_reg_set(priv, R_LAFL, filter[0]);
+ arc_reg_set(priv, R_LAFH, filter[1]);
+ }
+ }
+}
+
+/**
* arc_emac_stop - Close the network device.
* @ndev: Pointer to the network device.
*
@@ -620,6 +656,7 @@ static const struct net_device_ops arc_emac_netdev_ops = {
.ndo_start_xmit = arc_emac_tx,
.ndo_set_mac_address = arc_emac_set_address,
.ndo_get_stats = arc_emac_stats,
+ .ndo_set_rx_mode = arc_emac_set_rx_mode,
};
static int arc_emac_probe(struct platform_device *pdev)