drivers/net/netxen/netxen_nic_isr.c

   1 /*
   2  * Copyright (C) 2003 - 2006 NetXen, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  18  * MA  02111-1307, USA.
  19  *
  20  * The full GNU General Public License is included in this distribution
  21  * in the file called LICENSE.
  22  *
  23  * Contact Information:
  24  *    info@netxen.com
  25  * NetXen,
  26  * 3965 Freedom Circle, Fourth floor,
  27  * Santa Clara, CA 95054
  28  */
  29
  30 #include <linux/netdevice.h>
  31 #include <linux/delay.h>
  32
  33 #include "netxen_nic.h"
  34 #include "netxen_nic_hw.h"
  35 #include "netxen_nic_phan_reg.h"
  36
  37 /*
  38  * netxen_nic_get_stats - Get System Network Statistics
  39  * @netdev: network interface device structure
  40  */
  41 struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev)
  42 {
  43         struct netxen_port *port = netdev_priv(netdev);
  44         struct net_device_stats *stats = &port->net_stats;
  45
  46         memset(stats, 0, sizeof(*stats));
  47
  48         /* total packets received   */
  49         stats->rx_packets = port->stats.no_rcv;
  50         /* total packets transmitted    */
  51         stats->tx_packets = port->stats.xmitedframes + port->stats.xmitfinished;
  52         /* total bytes received     */
  53         stats->rx_bytes = port->stats.rxbytes;
  54         /* total bytes transmitted  */
  55         stats->tx_bytes = port->stats.txbytes;
  56         /* bad packets received     */
  57         stats->rx_errors = port->stats.rcvdbadskb;
  58         /* packet transmit problems */
  59         stats->tx_errors = port->stats.nocmddescriptor;
  60         /* no space in linux buffers    */
  61         stats->rx_dropped = port->stats.updropped;
  62         /* no space available in linux  */
  63         stats->tx_dropped = port->stats.txdropped;
  64
  65         return stats;
  66 }
  67
  68 void netxen_indicate_link_status(struct netxen_adapter *adapter, u32 portno,
  69                                  u32 link)
  70 {
  71         struct net_device *netdev = (adapter->port[portno])->netdev;
  72
  73         if (link)
  74                 netif_carrier_on(netdev);
  75         else
  76                 netif_carrier_off(netdev);
  77 }
  78
  79 void netxen_handle_port_int(struct netxen_adapter *adapter, u32 portno,
  80                             u32 enable)
  81 {
  82         __u32 int_src;
  83         struct netxen_port *port;
  84
  85         /*  This should clear the interrupt source */
  86         if (adapter->phy_read)
  87                 adapter->phy_read(adapter, portno,
  88                                   NETXEN_NIU_GB_MII_MGMT_ADDR_INT_STATUS,
  89                                   &int_src);
  90         if (int_src == 0) {
  91                 DPRINTK(INFO, "No phy interrupts for port #%d\n", portno);
  92                 return;
  93         }
  94         if (adapter->disable_phy_interrupts)
  95                 adapter->disable_phy_interrupts(adapter, portno);
  96
  97         port = adapter->port[portno];
  98
  99         if (netxen_get_phy_int_jabber(int_src))
 100                 DPRINTK(INFO, "Jabber interrupt \n");
 101
 102         if (netxen_get_phy_int_polarity_changed(int_src))
 103                 DPRINTK(INFO, "POLARITY CHANGED int \n");
 104
 105         if (netxen_get_phy_int_energy_detect(int_src))
 106                 DPRINTK(INFO, "ENERGY DETECT INT \n");
 107
 108         if (netxen_get_phy_int_downshift(int_src))
 109                 DPRINTK(INFO, "DOWNSHIFT INT \n");
 110         /* write it down later.. */
 111         if ((netxen_get_phy_int_speed_changed(int_src))
 112             || (netxen_get_phy_int_link_status_changed(int_src))) {
 113                 __u32 status;
 114
 115                 DPRINTK(INFO, "SPEED CHANGED OR LINK STATUS CHANGED \n");
 116
 117                 if (adapter->phy_read
 118                     && adapter->phy_read(adapter, portno,
 119                                          NETXEN_NIU_GB_MII_MGMT_ADDR_PHY_STATUS,
 120                                          &status) == 0) {
 121                         if (netxen_get_phy_int_link_status_changed(int_src)) {
 122                                 if (netxen_get_phy_link(status)) {
 123                                         netxen_niu_gbe_init_port(adapter,
 124                                                                  portno);
 125                                         printk("%s: %s Link UP\n",
 126                                                netxen_nic_driver_name,
 127                                                port->netdev->name);
 128
 129                                 } else {
 130                                         printk("%s: %s Link DOWN\n",
 131                                                netxen_nic_driver_name,
 132                                                port->netdev->name);
 133                                 }
 134                                 netxen_indicate_link_status(adapter, portno,
 135                                                             netxen_get_phy_link
 136                                                             (status));
 137                         }
 138                 }
 139         }
 140         if (adapter->enable_phy_interrupts)
 141                 adapter->enable_phy_interrupts(adapter, portno);
 142 }
 143
 144 void netxen_nic_isr_other(struct netxen_adapter *adapter)
 145 {
 146         u32 portno;
 147         u32 val, linkup, qg_linksup;
 148
 149         /* verify the offset */
 150         val = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_XG_STATE));
 151         if (val == adapter->ahw.qg_linksup)
 152                 return;
 153
 154         qg_linksup = adapter->ahw.qg_linksup;
 155         adapter->ahw.qg_linksup = val;
 156         DPRINTK(INFO, "link update 0x%08x\n", val);
 157         for (portno = 0; portno < NETXEN_NIU_MAX_GBE_PORTS; portno++) {
 158                 linkup = val & 1;
 159                 if (linkup != (qg_linksup & 1)) {
 160                         printk(KERN_INFO "%s: %s PORT %d link %s\n",
 161                                adapter->port[portno]->netdev->name,
 162                                netxen_nic_driver_name, portno,
 163                                ((linkup == 0) ? "down" : "up"));
 164                         netxen_indicate_link_status(adapter, portno, linkup);
 165                         if (linkup)
 166                                 netxen_nic_set_link_parameters(adapter->
 167                                                                port[portno]);
 168
 169                 }
 170                 val = val >> 1;
 171                 qg_linksup = qg_linksup >> 1;
 172         }
 173
 174         adapter->stats.otherints++;
 175
 176 }
 177
 178 void netxen_nic_gbe_handle_phy_intr(struct netxen_adapter *adapter)
 179 {
 180         netxen_nic_isr_other(adapter);
 181 }
 182
 183 void netxen_nic_xgbe_handle_phy_intr(struct netxen_adapter *adapter)
 184 {
 185         struct net_device *netdev = adapter->port[0]->netdev;
 186         u32 val;
 187
 188         /* WINDOW = 1 */
 189         val = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_XG_STATE));
 190
 191         if (adapter->ahw.xg_linkup == 1 && val != XG_LINK_UP) {
 192                 printk(KERN_INFO "%s: %s NIC Link is down\n",
 193                        netxen_nic_driver_name, netdev->name);
 194                 adapter->ahw.xg_linkup = 0;
 195                 /* read twice to clear sticky bits */
 196                 /* WINDOW = 0 */
 197                 netxen_nic_read_w0(adapter, NETXEN_NIU_XG_STATUS, &val);
 198                 netxen_nic_read_w0(adapter, NETXEN_NIU_XG_STATUS, &val);
 199
 200                 if ((val & 0xffb) != 0xffb) {
 201                         printk(KERN_INFO "%s ISR: Sync/Align BAD: 0x%08x\n",
 202                                netxen_nic_driver_name, val);
 203                 }
 204         } else if (adapter->ahw.xg_linkup == 0 && val == XG_LINK_UP) {
 205                 printk(KERN_INFO "%s: %s NIC Link is up\n",
 206                        netxen_nic_driver_name, netdev->name);
 207                 adapter->ahw.xg_linkup = 1;
 208         }
 209 }