[PATCH] e1000: Fix ASF/AMT for 8257{1|2|3} controllers

The 82573 controller required different logic than 82571|2 controllers.  Corrected the reset logic for 8257{1|2|3} controllers.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 105 insertions, 70 deletions

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 66cf1748ba9b..5b4287163e01 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -319,7 +319,75 @@ e1000_update_mng_vlan(struct e1000_adapter *adapter)
                 }
         }
 }
-        
+
+/**
+ * e1000_release_hw_control - release control of the h/w to f/w
+ * @adapter: address of board private structure
+ *
+ * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
+ * For ASF and Pass Through versions of f/w this means that the
+ * driver is no longer loaded. For AMT version (only with 82573) i
+ * of the f/w this means that the netowrk i/f is closed.
+ * 
+ **/
+
+static inline void 
+e1000_release_hw_control(struct e1000_adapter *adapter)
+{
+        uint32_t ctrl_ext;
+        uint32_t swsm;
+
+        /* Let firmware taken over control of h/w */
+        switch (adapter->hw.mac_type) {
+        case e1000_82571:
+        case e1000_82572:
+                ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
+                E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
+                                ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
+                break;
+        case e1000_82573:
+                swsm = E1000_READ_REG(&adapter->hw, SWSM);
+                E1000_WRITE_REG(&adapter->hw, SWSM,
+                                swsm & ~E1000_SWSM_DRV_LOAD);
+        default:
+                break;
+        }
+}
+
+/**
+ * e1000_get_hw_control - get control of the h/w from f/w
+ * @adapter: address of board private structure
+ *
+ * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
+ * For ASF and Pass Through versions of f/w this means that 
+ * the driver is loaded. For AMT version (only with 82573) 
+ * of the f/w this means that the netowrk i/f is open.
+ * 
+ **/
+
+static inline void 
+e1000_get_hw_control(struct e1000_adapter *adapter)
+{
+        uint32_t ctrl_ext;
+        uint32_t swsm;
+        /* Let firmware know the driver has taken over */
+        switch (adapter->hw.mac_type) {
+        case e1000_82571:
+        case e1000_82572:
+                ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
+                E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
+                                ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
+                break;
+        case e1000_82573:
+                swsm = E1000_READ_REG(&adapter->hw, SWSM);
+                E1000_WRITE_REG(&adapter->hw, SWSM,
+                                swsm | E1000_SWSM_DRV_LOAD);
+                break;
+        default:
+                break;
+        }
+}
+
 int
 e1000_up(struct e1000_adapter *adapter)
 {
@@ -523,8 +591,6 @@ e1000_probe(struct pci_dev *pdev,
         struct net_device *netdev;
         struct e1000_adapter *adapter;
         unsigned long mmio_start, mmio_len;
-        uint32_t ctrl_ext;
-        uint32_t swsm;
 
         static int cards_found = 0;
         int i, err, pci_using_dac;
@@ -736,22 +802,13 @@ e1000_probe(struct pci_dev *pdev,
         /* reset the hardware with the new settings */
         e1000_reset(adapter);
 
-        /* Let firmware know the driver has taken over */
-        switch(adapter->hw.mac_type) {
-        case e1000_82571:
-        case e1000_82572:
-                ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
-                E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
-                                ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
-                break;
-        case e1000_82573:
-                swsm = E1000_READ_REG(&adapter->hw, SWSM);
-                E1000_WRITE_REG(&adapter->hw, SWSM,
-                                swsm | E1000_SWSM_DRV_LOAD);
-                break;
-        default:
-                break;
-        }
+        /* If the controller is 82573 and f/w is AMT, do not set
+         * DRV_LOAD until the interface is up.  For all other cases,
+         * let the f/w know that the h/w is now under the control
+         * of the driver. */
+        if (adapter->hw.mac_type != e1000_82573 ||
+            !e1000_check_mng_mode(&adapter->hw))
+                e1000_get_hw_control(adapter);
 
         strcpy(netdev->name, "eth%d");
         if((err = register_netdev(netdev)))
@@ -788,8 +845,7 @@ e1000_remove(struct pci_dev *pdev)
 {
         struct net_device *netdev = pci_get_drvdata(pdev);
         struct e1000_adapter *adapter = netdev_priv(netdev);
-        uint32_t ctrl_ext;
-        uint32_t manc, swsm;
+        uint32_t manc;
 #ifdef CONFIG_E1000_NAPI
         int i;
 #endif
@@ -805,22 +861,9 @@ e1000_remove(struct pci_dev *pdev)
                 }
         }
 
-        switch(adapter->hw.mac_type) {
-        case e1000_82571:
-        case e1000_82572:
-                ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
-                E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
-                                ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
-                break;
-        case e1000_82573:
-                swsm = E1000_READ_REG(&adapter->hw, SWSM);
-                E1000_WRITE_REG(&adapter->hw, SWSM,
-                                swsm & ~E1000_SWSM_DRV_LOAD);
-                break;
-
-        default:
-                break;
-        }
+        /* Release control of h/w to f/w.  If f/w is AMT enabled, this
+         * would have already happened in close and is redundant. */
+        e1000_release_hw_control(adapter);
 
         unregister_netdev(netdev);
 #ifdef CONFIG_E1000_NAPI
@@ -1077,6 +1120,12 @@ e1000_open(struct net_device *netdev)
                 e1000_update_mng_vlan(adapter);
         }
 
+        /* If AMT is enabled, let the firmware know that the network
+         * interface is now open */
+        if (adapter->hw.mac_type == e1000_82573 &&
+            e1000_check_mng_mode(&adapter->hw))
+                e1000_get_hw_control(adapter);
+
         return E1000_SUCCESS;
 
 err_up:
@@ -1115,6 +1164,13 @@ e1000_close(struct net_device *netdev)
                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
         }
+
+        /* If AMT is enabled, let the firmware know that the network
+         * interface is now closed */
+        if (adapter->hw.mac_type == e1000_82573 &&
+            e1000_check_mng_mode(&adapter->hw))
+                e1000_release_hw_control(adapter);
+
         return 0;
 }
 
@@ -4182,7 +4238,7 @@ e1000_suspend(struct pci_dev *pdev, pm_message_t state)
 {
         struct net_device *netdev = pci_get_drvdata(pdev);
         struct e1000_adapter *adapter = netdev_priv(netdev);
-        uint32_t ctrl, ctrl_ext, rctl, manc, status, swsm;
+        uint32_t ctrl, ctrl_ext, rctl, manc, status;
         uint32_t wufc = adapter->wol;
 
         netif_device_detach(netdev);
@@ -4251,21 +4307,9 @@ e1000_suspend(struct pci_dev *pdev, pm_message_t state)
                 }
         }
 
-        switch(adapter->hw.mac_type) {
-        case e1000_82571:
-        case e1000_82572:
-                ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
-                E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
-                                ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
-                break;
-        case e1000_82573:
-                swsm = E1000_READ_REG(&adapter->hw, SWSM);
-                E1000_WRITE_REG(&adapter->hw, SWSM,
-                                swsm & ~E1000_SWSM_DRV_LOAD);
-                break;
-        default:
-                break;
-        }
+        /* Release control of h/w to f/w.  If f/w is AMT enabled, this
+         * would have already happened in close and is redundant. */
+        e1000_release_hw_control(adapter);
 
         pci_disable_device(pdev);
         pci_set_power_state(pdev, pci_choose_state(pdev, state));
@@ -4278,8 +4322,7 @@ e1000_resume(struct pci_dev *pdev)
 {
         struct net_device *netdev = pci_get_drvdata(pdev);
         struct e1000_adapter *adapter = netdev_priv(netdev);
-        uint32_t manc, ret_val, swsm;
-        uint32_t ctrl_ext;
+        uint32_t manc, ret_val;
 
         pci_set_power_state(pdev, PCI_D0);
         pci_restore_state(pdev);
@@ -4304,21 +4347,13 @@ e1000_resume(struct pci_dev *pdev)
                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
         }
 
-        switch(adapter->hw.mac_type) {
-        case e1000_82571:
-        case e1000_82572:
-                ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
-                E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
-                                ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
-                break;
-        case e1000_82573:
-                swsm = E1000_READ_REG(&adapter->hw, SWSM);
-                E1000_WRITE_REG(&adapter->hw, SWSM,
-                                swsm | E1000_SWSM_DRV_LOAD);
-                break;
-        default:
-                break;
-        }
+        /* If the controller is 82573 and f/w is AMT, do not set
+         * DRV_LOAD until the interface is up.  For all other cases,
+         * let the f/w know that the h/w is now under the control
+         * of the driver. */
+        if (adapter->hw.mac_type != e1000_82573 ||
+            !e1000_check_mng_mode(&adapter->hw))
+                e1000_get_hw_control(adapter);
 
         return 0;
 }