net/at91_ether: share macb_set_rx_mode with macb

Signed-off-by: Joachim Eastwood <manabian@gmail.com>

drivers/net/ethernet/cadence/at91_ether.c

@@ -140,111 +140,6 @@ static int set_mac_address(struct net_device *dev, void* addr)
 	return 0;
 }
 
-static int inline hash_bit_value(int bitnr, __u8 *addr)
-{
-	if (addr[bitnr / 8] & (1 << (bitnr % 8)))
-		return 1;
-	return 0;
-}
-
-/*
- * The hash address register is 64 bits long and takes up two locations in the memory map.
- * The least significant bits are stored in EMAC_HSL and the most significant
- * bits in EMAC_HSH.
- *
- * The unicast hash enable and the multicast hash enable bits in the network configuration
- *  register enable the reception of hash matched frames. The destination address is
- *  reduced to a 6 bit index into the 64 bit hash register using the following hash function.
- * The hash function is an exclusive or of every sixth bit of the destination address.
- *   hash_index[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
- *   hash_index[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
- *   hash_index[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
- *   hash_index[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
- *   hash_index[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
- *   hash_index[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
- * da[0] represents the least significant bit of the first byte received, that is, the multicast/
- *  unicast indicator, and da[47] represents the most significant bit of the last byte
- *  received.
- * If the hash index points to a bit that is set in the hash register then the frame will be
- *  matched according to whether the frame is multicast or unicast.
- * A multicast match will be signalled if the multicast hash enable bit is set, da[0] is 1 and
- *  the hash index points to a bit set in the hash register.
- * A unicast match will be signalled if the unicast hash enable bit is set, da[0] is 0 and the
- *  hash index points to a bit set in the hash register.
- * To receive all multicast frames, the hash register should be set with all ones and the
- *  multicast hash enable bit should be set in the network configuration register.
- */
-
-/*
- * Return the hash index value for the specified address.
- */
-static int hash_get_index(__u8 *addr)
-{
-	int i, j, bitval;
-	int hash_index = 0;
-
-	for (j = 0; j < 6; j++) {
-		for (i = 0, bitval = 0; i < 8; i++)
-			bitval ^= hash_bit_value(i*6 + j, addr);
-
-		hash_index |= (bitval << j);
-	}
-
-	return hash_index;
-}
-
-/*
- * Add multicast addresses to the internal multicast-hash table.
- */
-static void at91ether_sethashtable(struct net_device *dev)
-{
-	struct macb *lp = netdev_priv(dev);
-	struct netdev_hw_addr *ha;
-	unsigned long mc_filter[2];
-	unsigned int bitnr;
-
-	mc_filter[0] = mc_filter[1] = 0;
-
-	netdev_for_each_mc_addr(ha, dev) {
-		bitnr = hash_get_index(ha->addr);
-		mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
-	}
-
-	macb_writel(lp, HRB, mc_filter[0]);
-	macb_writel(lp, HRT, mc_filter[1]);
-}
-
-/*
- * Enable/Disable promiscuous and multicast modes.
- */
-static void at91ether_set_multicast_list(struct net_device *dev)
-{
-	struct macb *lp = netdev_priv(dev);
-	unsigned long cfg;
-
-	cfg = macb_readl(lp, NCFGR);
-
-	if (dev->flags & IFF_PROMISC)			/* Enable promiscuous mode */
-		cfg |= MACB_BIT(CAF);
-	else if (dev->flags & (~IFF_PROMISC))		/* Disable promiscuous mode */
-		cfg &= ~MACB_BIT(CAF);
-
-	if (dev->flags & IFF_ALLMULTI) {		/* Enable all multicast mode */
-		macb_writel(lp, HRT, -1);
-		macb_writel(lp, HRB, -1);
-		cfg |= MACB_BIT(NCFGR_MTI);
-	} else if (!netdev_mc_empty(dev)) { /* Enable specific multicasts */
-		at91ether_sethashtable(dev);
-		cfg |= MACB_BIT(NCFGR_MTI);
-	} else if (dev->flags & (~IFF_ALLMULTI)) {	/* Disable all multicast mode */
-		macb_writel(lp, HRT, 0);
-		macb_writel(lp, HRB, 0);
-		cfg &= ~MACB_BIT(NCFGR_MTI);
-	}
-
-	macb_writel(lp, NCFGR, cfg);
-}
-
 /* ................................ MAC ................................ */
 
 /*
@@ -500,7 +395,7 @@ static const struct net_device_ops at91ether_netdev_ops = {
 	.ndo_stop		= at91ether_close,
 	.ndo_start_xmit		= at91ether_start_xmit,
 	.ndo_get_stats		= at91ether_stats,
-	.ndo_set_rx_mode	= at91ether_set_multicast_list,
+	.ndo_set_rx_mode	= macb_set_rx_mode,
 	.ndo_set_mac_address	= set_mac_address,
 	.ndo_do_ioctl		= macb_ioctl,
 	.ndo_validate_addr	= eth_validate_addr,

drivers/net/ethernet/cadence/macb.c

@@ -997,7 +997,7 @@ static void macb_sethashtable(struct net_device *dev)
 /*
  * Enable/Disable promiscuous and multicast modes.
  */
-static void macb_set_rx_mode(struct net_device *dev)
+void macb_set_rx_mode(struct net_device *dev)
 {
 	unsigned long cfg;
 	struct macb *bp = netdev_priv(dev);
@@ -1029,6 +1029,7 @@ static void macb_set_rx_mode(struct net_device *dev)
 
 	macb_writel(bp, NCFGR, cfg);
 }
+EXPORT_SYMBOL_GPL(macb_set_rx_mode);
 
 static int macb_open(struct net_device *dev)
 {

drivers/net/ethernet/cadence/macb.h

@@ -574,6 +574,7 @@ extern const struct ethtool_ops macb_ethtool_ops;
 
 int macb_mii_init(struct macb *bp);
 int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+void macb_set_rx_mode(struct net_device *dev);
 
 static inline bool macb_is_gem(struct macb *bp)
 {