e1000e: power off PHY after reset when interface is down

Some Phys supported by the driver do not remain powered off across a reset
of the device when the interface is down, e.g. on 82571, but not on 82574.
This patch powers down (only when WoL is disabled) the PHY after a reset if
the interface is down and the ethtool diagnostics are not currently running.

The ethtool diagnostic function required a minor re-factor as a result, and
the e1000_[get|put]_hw_control() functions are renamed since they are no
longer static to netdev.c as they are needed by the ethtool diagnostics.
A couple minor whitespace issues were cleaned up, too.

Reported-by: Arthur Jones <ajones@riverbed.com>
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 53 insertions, 35 deletions

diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index 4b3802ae1082..5255be753746 100644
--- a/drivers/net/e1000e/e1000.h
+++ b/drivers/net/e1000e/e1000.h
@@ -497,6 +497,8 @@ extern void e1000e_free_tx_resources(struct e1000_adapter *adapter);
 extern void e1000e_update_stats(struct e1000_adapter *adapter);
 extern void e1000e_set_interrupt_capability(struct e1000_adapter *adapter);
 extern void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter);
+extern void e1000e_get_hw_control(struct e1000_adapter *adapter);
+extern void e1000e_release_hw_control(struct e1000_adapter *adapter);
 extern void e1000e_disable_aspm(struct pci_dev *pdev, u16 state);
 
 extern unsigned int copybreak;
diff --git a/drivers/net/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c
index c942ccab8bca..f8ed03dab9b1 100644
--- a/drivers/net/e1000e/ethtool.c
+++ b/drivers/net/e1000e/ethtool.c
@@ -1708,6 +1708,19 @@ static void e1000_diag_test(struct net_device *netdev,
         bool if_running = netif_running(netdev);
 
         set_bit(__E1000_TESTING, &adapter->state);
+
+        if (!if_running) {
+                /* Get control of and reset hardware */
+                if (adapter->flags & FLAG_HAS_AMT)
+                        e1000e_get_hw_control(adapter);
+
+                e1000e_power_up_phy(adapter);
+
+                adapter->hw.phy.autoneg_wait_to_complete = 1;
+                e1000e_reset(adapter);
+                adapter->hw.phy.autoneg_wait_to_complete = 0;
+        }
+
         if (eth_test->flags == ETH_TEST_FL_OFFLINE) {
                 /* Offline tests */
 
@@ -1721,8 +1734,6 @@ static void e1000_diag_test(struct net_device *netdev,
                 if (if_running)
                         /* indicate we're in test mode */
                         dev_close(netdev);
-                else
-                        e1000e_reset(adapter);
 
                 if (e1000_reg_test(adapter, &data[0]))
                         eth_test->flags |= ETH_TEST_FL_FAILED;
@@ -1736,8 +1747,6 @@ static void e1000_diag_test(struct net_device *netdev,
                         eth_test->flags |= ETH_TEST_FL_FAILED;
 
                 e1000e_reset(adapter);
-                /* make sure the phy is powered up */
-                e1000e_power_up_phy(adapter);
                 if (e1000_loopback_test(adapter, &data[3]))
                         eth_test->flags |= ETH_TEST_FL_FAILED;
 
@@ -1759,28 +1768,29 @@ static void e1000_diag_test(struct net_device *netdev,
                 if (if_running)
                         dev_open(netdev);
         } else {
-                if (!if_running && (adapter->flags & FLAG_HAS_AMT)) {
-                        clear_bit(__E1000_TESTING, &adapter->state);
-                        dev_open(netdev);
-                        set_bit(__E1000_TESTING, &adapter->state);
-                }
+                /* Online tests */
 
                 e_info("online testing starting\n");
-                /* Online tests */
-                if (e1000_link_test(adapter, &data[4]))
-                        eth_test->flags |= ETH_TEST_FL_FAILED;
 
-                /* Online tests aren't run; pass by default */
+                /* register, eeprom, intr and loopback tests not run online */
                 data[0] = 0;
                 data[1] = 0;
                 data[2] = 0;
                 data[3] = 0;
 
-                if (!if_running && (adapter->flags & FLAG_HAS_AMT))
-                        dev_close(netdev);
+                if (e1000_link_test(adapter, &data[4]))
+                        eth_test->flags |= ETH_TEST_FL_FAILED;
 
                 clear_bit(__E1000_TESTING, &adapter->state);
         }
+
+        if (!if_running) {
+                e1000e_reset(adapter);
+
+                if (adapter->flags & FLAG_HAS_AMT)
+                        e1000e_release_hw_control(adapter);
+        }
+
         msleep_interruptible(4 * 1000);
 }
 
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 98729a6fb096..fa5b60452547 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -1980,15 +1980,15 @@ static void e1000_irq_enable(struct e1000_adapter *adapter)
 }
 
 /**
- * e1000_get_hw_control - get control of the h/w from f/w
+ * e1000e_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|SWSM}:DRV_LOAD bit.
+ * e1000e_get_hw_control sets {CTRL_EXT|SWSM}: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 network i/f is open.
  **/
-static void e1000_get_hw_control(struct e1000_adapter *adapter)
+void e1000e_get_hw_control(struct e1000_adapter *adapter)
 {
         struct e1000_hw *hw = &adapter->hw;
         u32 ctrl_ext;
@@ -2005,16 +2005,16 @@ static void e1000_get_hw_control(struct e1000_adapter *adapter)
 }
 
 /**
- * e1000_release_hw_control - release control of the h/w to f/w
+ * e1000e_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|SWSM}:DRV_LOAD bit.
+ * e1000e_release_hw_control resets {CTRL_EXT|SWSM}: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 network i/f is closed.
  *
  **/
-static void e1000_release_hw_control(struct e1000_adapter *adapter)
+void e1000e_release_hw_control(struct e1000_adapter *adapter)
 {
         struct e1000_hw *hw = &adapter->hw;
         u32 ctrl_ext;
@@ -2445,7 +2445,7 @@ static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
             (vid == adapter->mng_vlan_id)) {
                 /* release control to f/w */
-                e1000_release_hw_control(adapter);
+                e1000e_release_hw_control(adapter);
                 return;
         }
 
@@ -3187,7 +3187,6 @@ void e1000e_reset(struct e1000_adapter *adapter)
                 ew32(PBA, pba);
         }
 
-
         /*
          * flow control settings
          *
@@ -3275,7 +3274,7 @@ void e1000e_reset(struct e1000_adapter *adapter)
          * that the network interface is in control
          */
         if (adapter->flags & FLAG_HAS_AMT)
-                e1000_get_hw_control(adapter);
+                e1000e_get_hw_control(adapter);
 
         ew32(WUC, 0);
 
@@ -3288,6 +3287,13 @@ void e1000e_reset(struct e1000_adapter *adapter)
         ew32(VET, ETH_P_8021Q);
 
         e1000e_reset_adaptive(hw);
+
+        if (!netif_running(adapter->netdev) &&
+            !test_bit(__E1000_TESTING, &adapter->state)) {
+                e1000_power_down_phy(adapter);
+                return;
+        }
+
         e1000_get_phy_info(hw);
 
         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
@@ -3573,7 +3579,7 @@ static int e1000_open(struct net_device *netdev)
          * interface is now open and reset the part to a known state.
          */
         if (adapter->flags & FLAG_HAS_AMT) {
-                e1000_get_hw_control(adapter);
+                e1000e_get_hw_control(adapter);
                 e1000e_reset(adapter);
         }
 
@@ -3637,7 +3643,7 @@ static int e1000_open(struct net_device *netdev)
         return 0;
 
 err_req_irq:
-        e1000_release_hw_control(adapter);
+        e1000e_release_hw_control(adapter);
         e1000_power_down_phy(adapter);
         e1000e_free_rx_resources(adapter);
 err_setup_rx:
@@ -3692,8 +3698,9 @@ static int e1000_close(struct net_device *netdev)
          * If AMT is enabled, let the firmware know that the network
          * interface is now closed
          */
-        if (adapter->flags & FLAG_HAS_AMT)
-                e1000_release_hw_control(adapter);
+        if ((adapter->flags & FLAG_HAS_AMT) &&
+            !test_bit(__E1000_TESTING, &adapter->state))
+                e1000e_release_hw_control(adapter);
 
         if ((adapter->flags & FLAG_HAS_ERT) ||
             (adapter->hw.mac.type == e1000_pch2lan))
@@ -5212,7 +5219,7 @@ static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake,
          * 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);
+        e1000e_release_hw_control(adapter);
 
         pci_disable_device(pdev);
 
@@ -5369,7 +5376,7 @@ static int __e1000_resume(struct pci_dev *pdev)
          * under the control of the driver.
          */
         if (!(adapter->flags & FLAG_HAS_AMT))
-                e1000_get_hw_control(adapter);
+                e1000e_get_hw_control(adapter);
 
         return 0;
 }
@@ -5616,7 +5623,7 @@ static void e1000_io_resume(struct pci_dev *pdev)
          * under the control of the driver.
          */
         if (!(adapter->flags & FLAG_HAS_AMT))
-                e1000_get_hw_control(adapter);
+                e1000e_get_hw_control(adapter);
 
 }
 
@@ -5966,7 +5973,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
          * under the control of the driver.
          */
         if (!(adapter->flags & FLAG_HAS_AMT))
-                e1000_get_hw_control(adapter);
+                e1000e_get_hw_control(adapter);
 
         strncpy(netdev->name, "eth%d", sizeof(netdev->name) - 1);
         err = register_netdev(netdev);
@@ -5985,12 +5992,11 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
 
 err_register:
         if (!(adapter->flags & FLAG_HAS_AMT))
-                e1000_release_hw_control(adapter);
+                e1000e_release_hw_control(adapter);
 err_eeprom:
         if (!e1000_check_reset_block(&adapter->hw))
                 e1000_phy_hw_reset(&adapter->hw);
 err_hw_init:
-
         kfree(adapter->tx_ring);
         kfree(adapter->rx_ring);
 err_sw_init:
@@ -6056,7 +6062,7 @@ static void __devexit e1000_remove(struct pci_dev *pdev)
          * 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);
+        e1000e_release_hw_control(adapter);
 
         e1000e_reset_interrupt_capability(adapter);
         kfree(adapter->tx_ring);