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_adapter *adapter = netdev_priv(netdev);
  44         struct net_device_stats *stats = &adapter->net_stats;
  45
  46         memset(stats, 0, sizeof(*stats));
  47
  48         /* total packets received   */
  49         stats->rx_packets = adapter->stats.no_rcv;
  50         /* total packets transmitted    */
  51         stats->tx_packets = adapter->stats.xmitedframes +
  52                 adapter->stats.xmitfinished;
  53         /* total bytes received     */
  54         stats->rx_bytes = adapter->stats.rxbytes;
  55         /* total bytes transmitted  */
  56         stats->tx_bytes = adapter->stats.txbytes;
  57         /* bad packets received     */
  58         stats->rx_errors = adapter->stats.rcvdbadskb;
  59         /* packet transmit problems */
  60         stats->tx_errors = adapter->stats.nocmddescriptor;
  61         /* no space in linux buffers    */
  62         stats->rx_dropped = adapter->stats.updropped;
  63         /* no space available in linux  */
  64         stats->tx_dropped = adapter->stats.txdropped;
  65
  66         return stats;
  67 }
  68
  69 static void netxen_indicate_link_status(struct netxen_adapter *adapter,
  70                                         u32 link)
  71 {
  72         struct net_device *netdev = adapter->netdev;
  73
  74         if (link)
  75                 netif_carrier_on(netdev);
  76         else
  77                 netif_carrier_off(netdev);
  78 }
  79
  80 #if 0
  81 void netxen_handle_port_int(struct netxen_adapter *adapter, u32 enable)
  82 {
  83         __u32 int_src;
  84
  85         /*  This should clear the interrupt source */
  86         if (adapter->phy_read)
  87                 adapter->phy_read(adapter,
  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);
  96
  97         if (netxen_get_phy_int_jabber(int_src))
  98                 DPRINTK(INFO, "Jabber interrupt \n");
  99
 100         if (netxen_get_phy_int_polarity_changed(int_src))
 101                 DPRINTK(INFO, "POLARITY CHANGED int \n");
 102
 103         if (netxen_get_phy_int_energy_detect(int_src))
 104                 DPRINTK(INFO, "ENERGY DETECT INT \n");
 105
 106         if (netxen_get_phy_int_downshift(int_src))
 107                 DPRINTK(INFO, "DOWNSHIFT INT \n");
 108         /* write it down later.. */
 109         if ((netxen_get_phy_int_speed_changed(int_src))
 110             || (netxen_get_phy_int_link_status_changed(int_src))) {
 111                 __u32 status;
 112
 113                 DPRINTK(INFO, "SPEED CHANGED OR LINK STATUS CHANGED \n");
 114
 115                 if (adapter->phy_read
 116                     && adapter->phy_read(adapter,
 117                                          NETXEN_NIU_GB_MII_MGMT_ADDR_PHY_STATUS,
 118                                          &status) == 0) {
 119                         if (netxen_get_phy_int_link_status_changed(int_src)) {
 120                                 if (netxen_get_phy_link(status)) {
 121                                         printk(KERN_INFO "%s: %s Link UP\n",
 122                                                netxen_nic_driver_name,
 123                                                adapter->netdev->name);
 124
 125                                 } else {
 126                                         printk(KERN_INFO "%s: %s Link DOWN\n",
 127                                                netxen_nic_driver_name,
 128                                                adapter->netdev->name);
 129                                 }
 130                                 netxen_indicate_link_status(adapter,
 131                                                             netxen_get_phy_link
 132                                                             (status));
 133                         }
 134                 }
 135         }
 136         if (adapter->enable_phy_interrupts)
 137                 adapter->enable_phy_interrupts(adapter);
 138 }
 139 #endif  /*  0  */
 140
 141 static void netxen_nic_isr_other(struct netxen_adapter *adapter)
 142 {
 143         int portno = adapter->portnum;
 144         u32 val, linkup, qg_linksup;
 145
 146         /* verify the offset */
 147         val = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_XG_STATE));
 148         val = val >> physical_port[adapter->portnum];
 149         if (val == adapter->ahw.qg_linksup)
 150                 return;
 151
 152         qg_linksup = adapter->ahw.qg_linksup;
 153         adapter->ahw.qg_linksup = val;
 154         DPRINTK(INFO, "link update 0x%08x\n", val);
 155
 156         linkup = val & 1;
 157
 158         if (linkup != (qg_linksup & 1)) {
 159                 printk(KERN_INFO "%s: %s PORT %d link %s\n",
 160                        adapter->netdev->name,
 161                        netxen_nic_driver_name, portno,
 162                        ((linkup == 0) ? "down" : "up"));
 163                 netxen_indicate_link_status(adapter, linkup);
 164                 if (linkup)
 165                         netxen_nic_set_link_parameters(adapter);
 166
 167         }
 168 }
 169
 170 void netxen_nic_gbe_handle_phy_intr(struct netxen_adapter *adapter)
 171 {
 172         netxen_nic_isr_other(adapter);
 173 }
 174
 175 int netxen_nic_link_ok(struct netxen_adapter *adapter)
 176 {
 177         switch (adapter->ahw.board_type) {
 178         case NETXEN_NIC_GBE:
 179                 return ((adapter->ahw.qg_linksup) & 1);
 180
 181         case NETXEN_NIC_XGBE:
 182                 return ((adapter->ahw.xg_linkup) & 1);
 183
 184         default:
 185                 printk(KERN_ERR"%s: Function: %s, Unknown board type\n",
 186                         netxen_nic_driver_name, __FUNCTION__);
 187                 break;
 188         }
 189
 190         return 0;
 191 }
 192
 193 void netxen_nic_xgbe_handle_phy_intr(struct netxen_adapter *adapter)
 194 {
 195         struct net_device *netdev = adapter->netdev;
 196         u32 val;
 197
 198         /* WINDOW = 1 */
 199         val = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_XG_STATE));
 200         val >>= (physical_port[adapter->portnum] * 8);
 201         val &= 0xff;
 202
 203         if (adapter->ahw.xg_linkup == 1 && val != XG_LINK_UP) {
 204                 printk(KERN_INFO "%s: %s NIC Link is down\n",
 205                        netxen_nic_driver_name, netdev->name);
 206                 adapter->ahw.xg_linkup = 0;
 207                 if (netif_running(netdev)) {
 208                         netif_carrier_off(netdev);
 209                         netif_stop_queue(netdev);
 210                 }
 211         } else if (adapter->ahw.xg_linkup == 0 && val == XG_LINK_UP) {
 212                 printk(KERN_INFO "%s: %s NIC Link is up\n",
 213                        netxen_nic_driver_name, netdev->name);
 214                 adapter->ahw.xg_linkup = 1;
 215                 netif_carrier_on(netdev);
 216                 netif_wake_queue(netdev);
 217         }
 218 }