RDMA/nes: Fix incorrect SFP+ link status detection on driver init

During iw_nes initialization the link status for SFP+ PHY is always
detected as "up" regardless of real state (cable either connected or
disconnected).  Add SFP+ PHY specific link status detection to the
iw_nes initialization procedure.  Use link status recheck for
netdev_open to detect delayed state updates.

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/nes/nes_nic.c b/drivers/infiniband/hw/nes/nes_nic.c
index 81052fb..2c9c193 100644 (file)
--- a/drivers/infiniband/hw/nes/nes_nic.c
+++ b/drivers/infiniband/hw/nes/nes_nic.c
@@ -241,6 +241,15 @@ static int nes_netdev_open(struct net_device *netdev)
                netif_carrier_on(netdev);
        }
 
+       spin_lock_irqsave(&nesdev->nesadapter->phy_lock, flags);
+       if (nesdev->nesadapter->phy_type[nesdev->mac_index] == NES_PHY_TYPE_SFP_D) {
+               if (nesdev->link_recheck)
+                       cancel_delayed_work(&nesdev->work);
+               nesdev->link_recheck = 1;
+               schedule_delayed_work(&nesdev->work, NES_LINK_RECHECK_DELAY);
+       }
+       spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags);
+
        spin_lock_irqsave(&nesvnic->port_ibevent_lock, flags);
        if (nesvnic->of_device_registered) {
                nesdev->nesadapter->send_term_ok = 1;
@@ -1782,8 +1791,11 @@ struct net_device *nes_netdev_init(struct nes_device *nesdev,
              (((PCI_FUNC(nesdev->pcidev->devfn) == 1) && (nesdev->mac_index == 2)) ||
               ((PCI_FUNC(nesdev->pcidev->devfn) == 2) && (nesdev->mac_index == 1)))))) {
                u32 u32temp;
-               u32 link_mask;
-               u32 link_val;
+               u32 link_mask = 0;
+               u32 link_val = 0;
+               u16 temp_phy_data;
+               u16 phy_data = 0;
+               unsigned long flags;
 
                u32temp = nes_read_indexed(nesdev, NES_IDX_PHY_PCS_CONTROL_STATUS0 +
                                (0x200 * (nesdev->mac_index & 1)));
@@ -1805,6 +1817,23 @@ struct net_device *nes_netdev_init(struct nes_device *nesdev,
                                link_val = 0x02020000;
                        }
                        break;
+               case NES_PHY_TYPE_SFP_D:
+                       spin_lock_irqsave(&nesdev->nesadapter->phy_lock, flags);
+                       nes_read_10G_phy_reg(nesdev,
+                                            nesdev->nesadapter->phy_index[nesdev->mac_index],
+                                            1, 0x9003);
+                       temp_phy_data = (u16)nes_read_indexed(nesdev, NES_IDX_MAC_MDIO_CONTROL);
+                       nes_read_10G_phy_reg(nesdev,
+                                            nesdev->nesadapter->phy_index[nesdev->mac_index],
+                                            3, 0x0021);
+                       nes_read_indexed(nesdev, NES_IDX_MAC_MDIO_CONTROL);
+                       nes_read_10G_phy_reg(nesdev,
+                                            nesdev->nesadapter->phy_index[nesdev->mac_index],
+                                            3, 0x0021);
+                       phy_data = (u16)nes_read_indexed(nesdev, NES_IDX_MAC_MDIO_CONTROL);
+                       spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags);
+                       phy_data = (!temp_phy_data && (phy_data == 0x8000)) ? 0x4 : 0x0;
+                       break;
                default:
                        link_mask = 0x0f1f0000;
                        link_val = 0x0f0f0000;
@@ -1814,8 +1843,14 @@ struct net_device *nes_netdev_init(struct nes_device *nesdev,
                u32temp = nes_read_indexed(nesdev,
                                           NES_IDX_PHY_PCS_CONTROL_STATUS0 +
                                           (0x200 * (nesdev->mac_index & 1)));
-               if ((u32temp & link_mask) == link_val)
-                       nesvnic->linkup = 1;
+
+               if (phy_type == NES_PHY_TYPE_SFP_D) {
+                       if (phy_data & 0x0004)
+                               nesvnic->linkup = 1;
+               } else {
+                       if ((u32temp & link_mask) == link_val)
+                               nesvnic->linkup = 1;
+               }
 
                /* clear the MAC interrupt status, assumes direct logical to physical mapping */
                u32temp = nes_read_indexed(nesdev, NES_IDX_MAC_INT_STATUS + (0x200 * nesdev->mac_index));