ixgbe: Enable support for recognizing PCI-e Gen3 link speed

This patch adds support for displaying PCIe Gen3 link speed, which was
previously missing from the driver.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_common.c

@@ -635,6 +635,9 @@ s32 ixgbe_get_bus_info_generic(struct ixgbe_hw *hw)
 	case IXGBE_PCI_LINK_SPEED_5000:
 		hw->bus.speed = ixgbe_bus_speed_5000;
 		break;
+	case IXGBE_PCI_LINK_SPEED_8000:
+		hw->bus.speed = ixgbe_bus_speed_8000;
+		break;
 	default:
 		hw->bus.speed = ixgbe_bus_speed_unknown;
 		break;

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -7490,7 +7490,8 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	/* print bus type/speed/width info */
 	e_dev_info("(PCI Express:%s:%s) %pM\n",
-		   (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" :
+		   (hw->bus.speed == ixgbe_bus_speed_8000 ? "8.0GT/s" :
+		    hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" :
 		    hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5GT/s" :
 		    "Unknown"),
 		   (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :

drivers/net/ethernet/intel/ixgbe/ixgbe_type.h

@@ -1827,6 +1827,7 @@ enum {
 #define IXGBE_PCI_LINK_SPEED      0xF
 #define IXGBE_PCI_LINK_SPEED_2500 0x1
 #define IXGBE_PCI_LINK_SPEED_5000 0x2
+#define IXGBE_PCI_LINK_SPEED_8000 0x3
 #define IXGBE_PCI_HEADER_TYPE_REGISTER  0x0E
 #define IXGBE_PCI_HEADER_TYPE_MULTIFUNC 0x80
 #define IXGBE_PCI_DEVICE_CONTROL2_16ms  0x0005
@@ -2650,6 +2651,7 @@ enum ixgbe_bus_speed {
 	ixgbe_bus_speed_133     = 133,
 	ixgbe_bus_speed_2500    = 2500,
 	ixgbe_bus_speed_5000    = 5000,
+	ixgbe_bus_speed_8000    = 8000,
 	ixgbe_bus_speed_reserved
 };