Commit a052b52f authored by Stephen Hemminger's avatar Stephen Hemminger
Browse files

sky2: accept multicast pause frames 



When using flow control, the PHY needs to accept multicast pause frames.
Without this fix, these frames were getting discarded by the PHY before
doing any flow control.

Signed-off-by: default avatarStephen Hemminger <shemminger@osdl.org>
parent 52c89cac

drivers/net/sky2.c

+18 −6
Original line number Diff line number Diff line
@@ -2850,6 +2850,14 @@ static int sky2_set_mac_address(struct net_device *dev, void *p) 
	return 0;

}



static void inline sky2_add_filter(u8 filter[8], const u8 *addr)

{

	u32 bit;



	bit = ether_crc(ETH_ALEN, addr) & 63;

	filter[bit >> 3] |= 1 << (bit & 7);

}



static void sky2_set_multicast(struct net_device *dev)

{

	struct sky2_port *sky2 = netdev_priv(dev);
@@ -2858,7 +2866,10 @@ static void sky2_set_multicast(struct net_device *dev) 
	struct dev_mc_list *list = dev->mc_list;

	u16 reg;

	u8 filter[8];

	int rx_pause;

	static const u8 pause_mc_addr[ETH_ALEN] = { 0x1, 0x80, 0xc2, 0x0, 0x0, 0x1 };



	rx_pause = (sky2->flow_status == FC_RX || sky2->flow_status == FC_BOTH);

	memset(filter, 0, sizeof(filter));



	reg = gma_read16(hw, port, GM_RX_CTRL);
@@ -2866,18 +2877,19 @@ static void sky2_set_multicast(struct net_device *dev) 


	if (dev->flags & IFF_PROMISC)	/* promiscuous */

		reg &= ~(GM_RXCR_UCF_ENA | GM_RXCR_MCF_ENA);

	else if ((dev->flags & IFF_ALLMULTI) || dev->mc_count > 16)	/* all multicast */

	else if (dev->flags & IFF_ALLMULTI)

		memset(filter, 0xff, sizeof(filter));

	else if (dev->mc_count == 0)	/* no multicast */

	else if (dev->mc_count == 0 && !rx_pause)

		reg &= ~GM_RXCR_MCF_ENA;

	else {

		int i;

		reg |= GM_RXCR_MCF_ENA;



		for (i = 0; list && i < dev->mc_count; i++, list = list->next) {

			u32 bit = ether_crc(ETH_ALEN, list->dmi_addr) & 0x3f;

			filter[bit / 8] |= 1 << (bit % 8);

		}

		if (rx_pause)

			sky2_add_filter(filter, pause_mc_addr);



		for (i = 0; list && i < dev->mc_count; i++, list = list->next)

			sky2_add_filter(filter, list->dmi_addr);

	}



	gma_write16(hw, port, GM_MC_ADDR_H1,