PCI hotplug: add support for 5.0G link speed

Add support for PCI-E 5.0 GT/s in max_bus_speed and cur_bus_speed.

Reviewed-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

3 files changed, 11 insertions, 3 deletions

diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c
index 9d44669bf098..0325d989bb46 100644
--- a/drivers/pci/hotplug/pci_hotplug_core.c
+++ b/drivers/pci/hotplug/pci_hotplug_core.c
@@ -87,6 +87,7 @@ static char *pci_bus_speed_strings[] = {
         "100 MHz PCIX 533",     /* 0x12 */
         "133 MHz PCIX 533",     /* 0x13 */
         "2.5 GT/s PCI-E",       /* 0x14 */
+        "5.0 GT/s PCI-E",       /* 0x15 */
 };
 
 #ifdef CONFIG_HOTPLUG_PCI_CPCI
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 52813257e5bf..271f917b6f2c 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -693,7 +693,10 @@ static int hpc_get_max_lnk_speed(struct slot *slot, enum pci_bus_speed *value)
 
         switch (lnk_cap & 0x000F) {
         case 1:
-                lnk_speed = PCIE_2PT5GB;
+                lnk_speed = PCIE_2_5GB;
+                break;
+        case 2:
+                lnk_speed = PCIE_5_0GB;
                 break;
         default:
                 lnk_speed = PCIE_LNK_SPEED_UNKNOWN;
@@ -772,7 +775,10 @@ static int hpc_get_cur_lnk_speed(struct slot *slot, enum pci_bus_speed *value)
 
         switch (lnk_status & PCI_EXP_LNKSTA_CLS) {
         case 1:
-                lnk_speed = PCIE_2PT5GB;
+                lnk_speed = PCIE_2_5GB;
+                break;
+        case 2:
+                lnk_speed = PCIE_5_0GB;
                 break;
         default:
                 lnk_speed = PCIE_LNK_SPEED_UNKNOWN;
diff --git a/include/linux/pci_hotplug.h b/include/linux/pci_hotplug.h
index 4391741b99dc..1b00cc3177fc 100644
--- a/include/linux/pci_hotplug.h
+++ b/include/linux/pci_hotplug.h
@@ -62,7 +62,8 @@ enum pcie_link_width {
 };
 
 enum pcie_link_speed {
-        PCIE_2PT5GB             = 0x14,
+        PCIE_2_5GB              = 0x14,
+        PCIE_5_0GB              = 0x15,
         PCIE_LNK_SPEED_UNKNOWN  = 0xFF,
 };