summaryrefslogtreecommitdiff
path: root/drivers/net/igb/e1000_mac.c
diff options
context:
space:
mode:
authorAlexander Duyck <alexander.h.duyck@intel.com>2010-04-27 05:02:40 +0400
committerDavid S. Miller <davem@davemloft.net>2010-04-27 23:53:28 +0400
commitff846f52935e6c8dfb0c97df7c2c1bf777454684 (patch)
treef7b17c3e0e76f221809e509b749df6ae5caf868b /drivers/net/igb/e1000_mac.c
parentef021194d262bdfa706dc5755596e252175a6bbc (diff)
downloadlinux-ff846f52935e6c8dfb0c97df7c2c1bf777454684.tar.xz
igb: add support for reporting 5GT/s during probe on PCIe Gen2
This change corrects the fact that we were not reporting Gen2 link speeds when we were in fact connected at Gen2 rates. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/igb/e1000_mac.c')
-rw-r--r--drivers/net/igb/e1000_mac.c27
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/net/igb/e1000_mac.c b/drivers/net/igb/e1000_mac.c
index be8d010e4021..90c5e01e9235 100644
--- a/drivers/net/igb/e1000_mac.c
+++ b/drivers/net/igb/e1000_mac.c
@@ -53,17 +53,30 @@ s32 igb_get_bus_info_pcie(struct e1000_hw *hw)
u16 pcie_link_status;
bus->type = e1000_bus_type_pci_express;
- bus->speed = e1000_bus_speed_2500;
ret_val = igb_read_pcie_cap_reg(hw,
- PCIE_LINK_STATUS,
- &pcie_link_status);
- if (ret_val)
+ PCI_EXP_LNKSTA,
+ &pcie_link_status);
+ if (ret_val) {
bus->width = e1000_bus_width_unknown;
- else
+ bus->speed = e1000_bus_speed_unknown;
+ } else {
+ switch (pcie_link_status & PCI_EXP_LNKSTA_CLS) {
+ case PCI_EXP_LNKSTA_CLS_2_5GB:
+ bus->speed = e1000_bus_speed_2500;
+ break;
+ case PCI_EXP_LNKSTA_CLS_5_0GB:
+ bus->speed = e1000_bus_speed_5000;
+ break;
+ default:
+ bus->speed = e1000_bus_speed_unknown;
+ break;
+ }
+
bus->width = (enum e1000_bus_width)((pcie_link_status &
- PCIE_LINK_WIDTH_MASK) >>
- PCIE_LINK_WIDTH_SHIFT);
+ PCI_EXP_LNKSTA_NLW) >>
+ PCI_EXP_LNKSTA_NLW_SHIFT);
+ }
reg = rd32(E1000_STATUS);
bus->func = (reg & E1000_STATUS_FUNC_MASK) >> E1000_STATUS_FUNC_SHIFT;