PCI: Make current and maximum bus speeds part of the PCI core

[deliverable/linux.git] / drivers / pci / probe.c

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index dd64310a735e0163290593157aabab7b73352445..51cf8982fec7b6a2ce744feea1b6b7fa6e31e1ca 100644 (file)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -387,10 +387,37 @@ static struct pci_bus * pci_alloc_bus(void)
                INIT_LIST_HEAD(&b->children);
                INIT_LIST_HEAD(&b->devices);
                INIT_LIST_HEAD(&b->slots);
+               b->max_bus_speed = PCI_SPEED_UNKNOWN;
+               b->cur_bus_speed = PCI_SPEED_UNKNOWN;
        }
        return b;
 }
 
+static unsigned char pcie_link_speed[] = {
+       PCI_SPEED_UNKNOWN,              /* 0 */
+       PCIE_SPEED_2_5GT,               /* 1 */
+       PCIE_SPEED_5_0GT,               /* 2 */
+       PCI_SPEED_UNKNOWN,              /* 3 */
+       PCI_SPEED_UNKNOWN,              /* 4 */
+       PCI_SPEED_UNKNOWN,              /* 5 */
+       PCI_SPEED_UNKNOWN,              /* 6 */
+       PCI_SPEED_UNKNOWN,              /* 7 */
+       PCI_SPEED_UNKNOWN,              /* 8 */
+       PCI_SPEED_UNKNOWN,              /* 9 */
+       PCI_SPEED_UNKNOWN,              /* A */
+       PCI_SPEED_UNKNOWN,              /* B */
+       PCI_SPEED_UNKNOWN,              /* C */
+       PCI_SPEED_UNKNOWN,              /* D */
+       PCI_SPEED_UNKNOWN,              /* E */
+       PCI_SPEED_UNKNOWN               /* F */
+};
+
+void pcie_update_link_speed(struct pci_bus *bus, u16 linksta)
+{
+       bus->cur_bus_speed = pcie_link_speed[linksta & 0xf];
+}
+EXPORT_SYMBOL_GPL(pcie_update_link_speed);
+
 static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
                                           struct pci_dev *bridge, int busnr)
 {