igb: Add messaging for thermal sensor events on i350 devices

This feature adds messaging to the link status change to notify
the user if the device returned from a downshift or power off
event due to the Thermal Sensor feature in i350 parts. Feature
is only available on internal copper ports.

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 36 insertions, 1 deletions

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 5366f2ab65f0..3d850af0cdda 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -3550,7 +3550,7 @@ static void igb_watchdog_task(struct work_struct *work)
                                                    watchdog_task);
         struct e1000_hw *hw = &adapter->hw;
         struct net_device *netdev = adapter->netdev;
-        u32 link;
+        u32 link, ctrl_ext, thstat;
         int i;
 
         link = igb_has_link(adapter);
@@ -3574,6 +3574,25 @@ static void igb_watchdog_task(struct work_struct *work)
                                ((ctrl & E1000_CTRL_RFCE) ?  "RX" :
                                ((ctrl & E1000_CTRL_TFCE) ?  "TX" : "None")));
 
+                        /* check for thermal sensor event on i350,
+                         * copper only */
+                        if (hw->mac.type == e1000_i350) {
+                                thstat = rd32(E1000_THSTAT);
+                                ctrl_ext = rd32(E1000_CTRL_EXT);
+                                if ((hw->phy.media_type ==
+                                     e1000_media_type_copper) && !(ctrl_ext &
+                                     E1000_CTRL_EXT_LINK_MODE_SGMII)) {
+                                        if (thstat &
+                                            E1000_THSTAT_LINK_THROTTLE) {
+                                                printk(KERN_INFO "igb: %s The "
+                                                       "network adapter link "
+                                                       "speed was downshifted "
+                                                       "because it "
+                                                       "overheated.\n",
+                                                       netdev->name);
+                                        }
+                                }
+                        }
                         /* adjust timeout factor according to speed/duplex */
                         adapter->tx_timeout_factor = 1;
                         switch (adapter->link_speed) {
@@ -3599,6 +3618,22 @@ static void igb_watchdog_task(struct work_struct *work)
                 if (netif_carrier_ok(netdev)) {
                         adapter->link_speed = 0;
                         adapter->link_duplex = 0;
+                        /* check for thermal sensor event on i350
+                         * copper only*/
+                        if (hw->mac.type == e1000_i350) {
+                                thstat = rd32(E1000_THSTAT);
+                                ctrl_ext = rd32(E1000_CTRL_EXT);
+                                if ((hw->phy.media_type ==
+                                     e1000_media_type_copper) && !(ctrl_ext &
+                                     E1000_CTRL_EXT_LINK_MODE_SGMII)) {
+                                        if (thstat & E1000_THSTAT_PWR_DOWN) {
+                                                printk(KERN_ERR "igb: %s The "
+                                                "network adapter was stopped "
+                                                "because it overheated.\n",
+                                                netdev->name);
+                                        }
+                                }
+                        }
                         /* Links status message must follow this format */
                         printk(KERN_INFO "igb: %s NIC Link is Down\n",
                                netdev->name);