release/src-rt-6.x/linux/linux-2.6/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 void netxen_indicate_link_status(struct netxen_adapter *adapter, u32 link)
  70 {
  71         struct net_device *netdev = adapter->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 enable)
  80 {
  81         __u32 int_src;
  82
  83         /*  This should clear the interrupt source */
  84         if (adapter->phy_read)
  85                 adapter->phy_read(adapter,
  86                                   NETXEN_NIU_GB_MII_MGMT_ADDR_INT_STATUS,
  87                                   &int_src);
  88         if (int_src == 0) {
  89                 DPRINTK(INFO, "No phy interrupts for port #%d\n", portno);
  90                 return;
  91         }
  92         if (adapter->disable_phy_interrupts)
  93                 adapter->disable_phy_interrupts(adapter);
  94
  95         if (netxen_get_phy_int_jabber(int_src))
  96                 DPRINTK(INFO, "Jabber interrupt \n");
  97
  98         if (netxen_get_phy_int_polarity_changed(int_src))
  99                 DPRINTK(INFO, "POLARITY CHANGED int \n");
 100
 101         if (netxen_get_phy_int_energy_detect(int_src))
 102                 DPRINTK(INFO, "ENERGY DETECT INT \n");
 103
 104         if (netxen_get_phy_int_downshift(int_src))
 105                 DPRINTK(INFO, "DOWNSHIFT INT \n");
 106         /* write it down later.. */
 107         if ((netxen_get_phy_int_speed_changed(int_src))
 108             || (netxen_get_phy_int_link_status_changed(int_src))) {
 109                 __u32 status;
 110
 111                 DPRINTK(INFO, "SPEED CHANGED OR LINK STATUS CHANGED \n");
 112
 113                 if (adapter->phy_read
 114                     && adapter->phy_read(adapter,
 115                                          NETXEN_NIU_GB_MII_MGMT_ADDR_PHY_STATUS,
 116                                          &status) == 0) {
 117                         if (netxen_get_phy_int_link_status_changed(int_src)) {
 118                                 if (netxen_get_phy_link(status)) {
 119                                         printk(KERN_INFO "%s: %s Link UP\n",
 120                                                netxen_nic_driver_name,
 121                                                adapter->netdev->name);
 122
 123                                 } else {
 124                                         printk(KERN_INFO "%s: %s Link DOWN\n",
 125                                                netxen_nic_driver_name,
 126                                                adapter->netdev->name);
 127                                 }
 128                                 netxen_indicate_link_status(adapter,
 129                                                             netxen_get_phy_link
 130                                                             (status));
 131                         }
 132                 }
 133         }
 134         if (adapter->enable_phy_interrupts)
 135                 adapter->enable_phy_interrupts(adapter);
 136 }
 137
 138 void netxen_nic_isr_other(struct netxen_adapter *adapter)
 139 {
 140         int portno = adapter->portnum;
 141         u32 val, linkup, qg_linksup;
 142
 143         /* verify the offset */
 144         val = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_XG_STATE));
 145         val = val >> physical_port[adapter->portnum];
 146         if (val == adapter->ahw.qg_linksup)
 147                 return;
 148
 149         qg_linksup = adapter->ahw.qg_linksup;
 150         adapter->ahw.qg_linksup = val;
 151         DPRINTK(INFO, "link update 0x%08x\n", val);
 152
 153         linkup = val & 1;
 154
 155         if (linkup != (qg_linksup & 1)) {
 156                 printk(KERN_INFO "%s: %s PORT %d link %s\n",
 157                        adapter->netdev->name,
 158                        netxen_nic_driver_name, portno,
 159                        ((linkup == 0) ? "down" : "up"));
 160                 netxen_indicate_link_status(adapter, linkup);
 161                 if (linkup)
 162                         netxen_nic_set_link_parameters(adapter);
 163
 164         }
 165 }
 166
 167 void netxen_nic_gbe_handle_phy_intr(struct netxen_adapter *adapter)
 168 {
 169         netxen_nic_isr_other(adapter);
 170 }
 171
 172 int netxen_nic_link_ok(struct netxen_adapter *adapter)
 173 {
 174         switch (adapter->ahw.board_type) {
 175         case NETXEN_NIC_GBE:
 176                 return ((adapter->ahw.qg_linksup) & 1);
 177
 178         case NETXEN_NIC_XGBE:
 179                 return ((adapter->ahw.xg_linkup) & 1);
 180
 181         default:
 182                 printk(KERN_ERR"%s: Function: %s, Unknown board type\n",
 183                         netxen_nic_driver_name, __FUNCTION__);
 184                 break;
 185         }
 186
 187         return 0;
 188 }
 189
 190 void netxen_nic_xgbe_handle_phy_intr(struct netxen_adapter *adapter)
 191 {
 192         struct net_device *netdev = adapter->netdev;
 193         u32 val, val1;
 194
 195         /* WINDOW = 1 */
 196         val = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_XG_STATE));
 197         val >>= (physical_port[adapter->portnum] * 8);
 198         val1 = val & 0xff;
 199
 200         if (adapter->ahw.xg_linkup == 1 && val1 != XG_LINK_UP) {
 201                 printk(KERN_INFO "%s: %s NIC Link is down\n",
 202                        netxen_nic_driver_name, netdev->name);
 203                 adapter->ahw.xg_linkup = 0;
 204                 if (netif_running(netdev)) {
 205                         netif_carrier_off(netdev);
 206                         netif_stop_queue(netdev);
 207                 }
 208                 /* read twice to clear sticky bits */
 209                 /* WINDOW = 0 */
 210                 netxen_nic_read_w0(adapter, NETXEN_NIU_XG_STATUS, &val1);
 211                 netxen_nic_read_w0(adapter, NETXEN_NIU_XG_STATUS, &val1);
 212
 213                 if ((val & 0xffb) != 0xffb) {
 214                         printk(KERN_INFO "%s ISR: Sync/Align BAD: 0x%08x\n",
 215                                netxen_nic_driver_name, val1);
 216                 }
 217         } else if (adapter->ahw.xg_linkup == 0 && val1 == XG_LINK_UP) {
 218                 printk(KERN_INFO "%s: %s NIC Link is up\n",
 219                        netxen_nic_driver_name, netdev->name);
 220                 adapter->ahw.xg_linkup = 1;
 221                 netif_carrier_on(netdev);
 222                 netif_wake_queue(netdev);
 223         }
 224 }