linux/drivers/net/netxen/netxen_nic_isr.c
Mithlesh Thukral c27e672172 NetXen: Fix link status messages
NetXen: Fix incorrect link status even with switch turned OFF.
NetXen driver failed to accurately indicate when a link is up or down.
This was encountered during failover testing, when the first port
indicated that the link was up even when the 10G switch it was assigned
to in the Bladecenter was turned off completely.

Signed-off by: Wen Xiong <wenxiong@us.ibm.com>
Signed-off by: Mithlesh Thukral <mithlesh@netxen.com>

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-06-12 18:58:58 -04:00

225 lines
6.2 KiB
C

/*
* Copyright (C) 2003 - 2006 NetXen, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.
*
* Contact Information:
* info@netxen.com
* NetXen,
* 3965 Freedom Circle, Fourth floor,
* Santa Clara, CA 95054
*/
#include <linux/netdevice.h>
#include <linux/delay.h>
#include "netxen_nic.h"
#include "netxen_nic_hw.h"
#include "netxen_nic_phan_reg.h"
/*
* netxen_nic_get_stats - Get System Network Statistics
* @netdev: network interface device structure
*/
struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev)
{
struct netxen_adapter *adapter = netdev_priv(netdev);
struct net_device_stats *stats = &adapter->net_stats;
memset(stats, 0, sizeof(*stats));
/* total packets received */
stats->rx_packets = adapter->stats.no_rcv;
/* total packets transmitted */
stats->tx_packets = adapter->stats.xmitedframes +
adapter->stats.xmitfinished;
/* total bytes received */
stats->rx_bytes = adapter->stats.rxbytes;
/* total bytes transmitted */
stats->tx_bytes = adapter->stats.txbytes;
/* bad packets received */
stats->rx_errors = adapter->stats.rcvdbadskb;
/* packet transmit problems */
stats->tx_errors = adapter->stats.nocmddescriptor;
/* no space in linux buffers */
stats->rx_dropped = adapter->stats.updropped;
/* no space available in linux */
stats->tx_dropped = adapter->stats.txdropped;
return stats;
}
void netxen_indicate_link_status(struct netxen_adapter *adapter, u32 link)
{
struct net_device *netdev = adapter->netdev;
if (link)
netif_carrier_on(netdev);
else
netif_carrier_off(netdev);
}
void netxen_handle_port_int(struct netxen_adapter *adapter, u32 enable)
{
__u32 int_src;
/* This should clear the interrupt source */
if (adapter->phy_read)
adapter->phy_read(adapter,
NETXEN_NIU_GB_MII_MGMT_ADDR_INT_STATUS,
&int_src);
if (int_src == 0) {
DPRINTK(INFO, "No phy interrupts for port #%d\n", portno);
return;
}
if (adapter->disable_phy_interrupts)
adapter->disable_phy_interrupts(adapter);
if (netxen_get_phy_int_jabber(int_src))
DPRINTK(INFO, "Jabber interrupt \n");
if (netxen_get_phy_int_polarity_changed(int_src))
DPRINTK(INFO, "POLARITY CHANGED int \n");
if (netxen_get_phy_int_energy_detect(int_src))
DPRINTK(INFO, "ENERGY DETECT INT \n");
if (netxen_get_phy_int_downshift(int_src))
DPRINTK(INFO, "DOWNSHIFT INT \n");
/* write it down later.. */
if ((netxen_get_phy_int_speed_changed(int_src))
|| (netxen_get_phy_int_link_status_changed(int_src))) {
__u32 status;
DPRINTK(INFO, "SPEED CHANGED OR LINK STATUS CHANGED \n");
if (adapter->phy_read
&& adapter->phy_read(adapter,
NETXEN_NIU_GB_MII_MGMT_ADDR_PHY_STATUS,
&status) == 0) {
if (netxen_get_phy_int_link_status_changed(int_src)) {
if (netxen_get_phy_link(status)) {
printk(KERN_INFO "%s: %s Link UP\n",
netxen_nic_driver_name,
adapter->netdev->name);
} else {
printk(KERN_INFO "%s: %s Link DOWN\n",
netxen_nic_driver_name,
adapter->netdev->name);
}
netxen_indicate_link_status(adapter,
netxen_get_phy_link
(status));
}
}
}
if (adapter->enable_phy_interrupts)
adapter->enable_phy_interrupts(adapter);
}
void netxen_nic_isr_other(struct netxen_adapter *adapter)
{
int portno = adapter->portnum;
u32 val, linkup, qg_linksup;
/* verify the offset */
val = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_XG_STATE));
val = val >> physical_port[adapter->portnum];
if (val == adapter->ahw.qg_linksup)
return;
qg_linksup = adapter->ahw.qg_linksup;
adapter->ahw.qg_linksup = val;
DPRINTK(INFO, "link update 0x%08x\n", val);
linkup = val & 1;
if (linkup != (qg_linksup & 1)) {
printk(KERN_INFO "%s: %s PORT %d link %s\n",
adapter->netdev->name,
netxen_nic_driver_name, portno,
((linkup == 0) ? "down" : "up"));
netxen_indicate_link_status(adapter, linkup);
if (linkup)
netxen_nic_set_link_parameters(adapter);
}
}
void netxen_nic_gbe_handle_phy_intr(struct netxen_adapter *adapter)
{
netxen_nic_isr_other(adapter);
}
int netxen_nic_link_ok(struct netxen_adapter *adapter)
{
switch (adapter->ahw.board_type) {
case NETXEN_NIC_GBE:
return ((adapter->ahw.qg_linksup) & 1);
case NETXEN_NIC_XGBE:
return ((adapter->ahw.xg_linkup) & 1);
default:
printk(KERN_ERR"%s: Function: %s, Unknown board type\n",
netxen_nic_driver_name, __FUNCTION__);
break;
}
return 0;
}
void netxen_nic_xgbe_handle_phy_intr(struct netxen_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
u32 val, val1;
/* WINDOW = 1 */
val = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_XG_STATE));
val >>= (physical_port[adapter->portnum] * 8);
val1 = val & 0xff;
if (adapter->ahw.xg_linkup == 1 && val1 != XG_LINK_UP) {
printk(KERN_INFO "%s: %s NIC Link is down\n",
netxen_nic_driver_name, netdev->name);
adapter->ahw.xg_linkup = 0;
if (netif_running(netdev)) {
netif_carrier_off(netdev);
netif_stop_queue(netdev);
}
/* read twice to clear sticky bits */
/* WINDOW = 0 */
netxen_nic_read_w0(adapter, NETXEN_NIU_XG_STATUS, &val1);
netxen_nic_read_w0(adapter, NETXEN_NIU_XG_STATUS, &val1);
if ((val & 0xffb) != 0xffb) {
printk(KERN_INFO "%s ISR: Sync/Align BAD: 0x%08x\n",
netxen_nic_driver_name, val1);
}
} else if (adapter->ahw.xg_linkup == 0 && val1 == XG_LINK_UP) {
printk(KERN_INFO "%s: %s NIC Link is up\n",
netxen_nic_driver_name, netdev->name);
adapter->ahw.xg_linkup = 1;
netif_carrier_on(netdev);
netif_wake_queue(netdev);
}
}