From c4cd29d2058808b7a68e3f2e6cbbcfe19ca7233d Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Fri, 23 Feb 2007 14:03:00 -0800 Subject: skge: fix transmitter flow control It looks like the skge driver inherited another bug from the sk98lin code. If I send from 1000mbit port to a machine on 100mbit port, the switch should be doing hardware flow control, but no pause frames show up in the statistics. This is the analog of the recent sky2 fixes. The device needs to listen for multicast pause frames and then not discard them. Signed-off-by: Stephen Hemminger Signed-off-by: Jeff Garzik --- drivers/net/skge.c | 43 ++++++++++++++++++++++++++++++++----------- drivers/net/skge.h | 3 +-- 2 files changed, 33 insertions(+), 13 deletions(-) (limited to 'drivers/net') diff --git a/drivers/net/skge.c b/drivers/net/skge.c index c3d2e0a2c4e..f59f37aacce 100644 --- a/drivers/net/skge.c +++ b/drivers/net/skge.c @@ -2767,6 +2767,17 @@ static int skge_change_mtu(struct net_device *dev, int new_mtu) return err; } +static const u8 pause_mc_addr[ETH_ALEN] = { 0x1, 0x80, 0xc2, 0x0, 0x0, 0x1 }; + +static void genesis_add_filter(u8 filter[8], const u8 *addr) +{ + u32 crc, bit; + + crc = ether_crc_le(ETH_ALEN, addr); + bit = ~crc & 0x3f; + filter[bit/8] |= 1 << (bit%8); +} + static void genesis_set_multicast(struct net_device *dev) { struct skge_port *skge = netdev_priv(dev); @@ -2788,24 +2799,33 @@ static void genesis_set_multicast(struct net_device *dev) memset(filter, 0xff, sizeof(filter)); else { memset(filter, 0, sizeof(filter)); - for (i = 0; list && i < count; i++, list = list->next) { - u32 crc, bit; - crc = ether_crc_le(ETH_ALEN, list->dmi_addr); - bit = ~crc & 0x3f; - filter[bit/8] |= 1 << (bit%8); - } + + if (skge->flow_status == FLOW_STAT_REM_SEND + || skge->flow_status == FLOW_STAT_SYMMETRIC) + genesis_add_filter(filter, pause_mc_addr); + + for (i = 0; list && i < count; i++, list = list->next) + genesis_add_filter(filter, list->dmi_addr); } xm_write32(hw, port, XM_MODE, mode); xm_outhash(hw, port, XM_HSM, filter); } +static void yukon_add_filter(u8 filter[8], const u8 *addr) +{ + u32 bit = ether_crc(ETH_ALEN, addr) & 0x3f; + filter[bit/8] |= 1 << (bit%8); +} + static void yukon_set_multicast(struct net_device *dev) { struct skge_port *skge = netdev_priv(dev); struct skge_hw *hw = skge->hw; int port = skge->port; struct dev_mc_list *list = dev->mc_list; + int rx_pause = (skge->flow_status == FLOW_STAT_REM_SEND + || skge->flow_status == FLOW_STAT_SYMMETRIC); u16 reg; u8 filter[8]; @@ -2818,16 +2838,17 @@ static void yukon_set_multicast(struct net_device *dev) reg &= ~(GM_RXCR_UCF_ENA | GM_RXCR_MCF_ENA); else if (dev->flags & IFF_ALLMULTI) /* all multicast */ memset(filter, 0xff, sizeof(filter)); - else if (dev->mc_count == 0) /* no multicast */ + else if (dev->mc_count == 0 && !rx_pause)/* no multicast */ 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) + yukon_add_filter(filter, pause_mc_addr); + + for (i = 0; list && i < dev->mc_count; i++, list = list->next) + yukon_add_filter(filter, list->dmi_addr); } diff --git a/drivers/net/skge.h b/drivers/net/skge.h index 17b1b479dff..e9354dfa7e9 100644 --- a/drivers/net/skge.h +++ b/drivers/net/skge.h @@ -1849,8 +1849,7 @@ enum { GMR_FS_JABBER, /* Rx GMAC FIFO Flush Mask (default) */ RX_FF_FL_DEF_MSK = GMR_FS_CRC_ERR | GMR_FS_RX_FF_OV |GMR_FS_MII_ERR | - GMR_FS_BAD_FC | GMR_FS_GOOD_FC | GMR_FS_UN_SIZE | - GMR_FS_JABBER, + GMR_FS_BAD_FC | GMR_FS_UN_SIZE | GMR_FS_JABBER, }; /* RX_GMF_CTRL_T 32 bit Rx GMAC FIFO Control/Test */ -- cgit v1.2.3-18-g5258