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>

diff --git a/drivers/net/igb/e1000_defines.h b/drivers/net/igb/e1000_defines.h
index 9bb1928..6b80d40 100644 (file)
--- a/drivers/net/igb/e1000_defines.h
+++ b/drivers/net/igb/e1000_defines.h
@@ -51,6 +51,7 @@
 #define E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES  0x00C00000
 #define E1000_CTRL_EXT_LINK_MODE_1000BASE_KX  0x00400000
 #define E1000_CTRL_EXT_LINK_MODE_SGMII   0x00800000
+#define E1000_CTRL_EXT_LINK_MODE_GMII   0x00000000
 #define E1000_CTRL_EXT_EIAME          0x01000000
 #define E1000_CTRL_EXT_IRCA           0x00000001
 /* Interrupt delay cancellation */
@@ -788,6 +789,10 @@
 #define E1000_MDIC_ERROR     0x40000000
 #define E1000_MDIC_DEST      0x80000000
 
+/* Thermal Sensor */
+#define E1000_THSTAT_PWR_DOWN       0x00000001 /* Power Down Event */
+#define E1000_THSTAT_LINK_THROTTLE  0x00000002 /* Link Speed Throttle Event */
+
 /* Energy Efficient Ethernet */
 #define E1000_IPCNFG_EEE_1G_AN       0x00000008  /* EEE Enable 1G AN */
 #define E1000_IPCNFG_EEE_100M_AN     0x00000004  /* EEE Enable 100M AN */

diff --git a/drivers/net/igb/e1000_regs.h b/drivers/net/igb/e1000_regs.h
index ad77ed5..958ca3b 100644 (file)
--- a/drivers/net/igb/e1000_regs.h
+++ b/drivers/net/igb/e1000_regs.h
@@ -342,6 +342,9 @@
 #define E1000_IPCNFG  0x0E38  /* Internal PHY Configuration */
 #define E1000_EEER    0x0E30  /* Energy Efficient Ethernet */
 
+/* Thermal Sensor Register */
+#define E1000_THSTAT    0x08110 /* Thermal Sensor Status */
+
 /* OS2BMC Registers */
 #define E1000_B2OSPC    0x08FE0 /* BMC2OS packets sent by BMC */
 #define E1000_B2OGPRC   0x04158 /* BMC2OS packets received by host */

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 5366f2a..3d850af 100644 (file)
--- 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);