PCI: add Intel 82599 Virtual Function specific reset method

Handle device specific timeout and use FLR.

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index cf96776..8726698 100644 (file)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2664,7 +2664,29 @@ static int reset_intel_generic_dev(struct pci_dev *dev, int probe)
        }
 }
 
+static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, int probe)
+{
+       int pos;
+
+       pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
+       if (!pos)
+               return -ENOTTY;
+
+       if (probe)
+               return 0;
+
+       pci_write_config_word(dev, pos + PCI_EXP_DEVCTL,
+                               PCI_EXP_DEVCTL_BCR_FLR);
+       msleep(100);
+
+       return 0;
+}
+
+#define PCI_DEVICE_ID_INTEL_82599_SFP_VF   0x10ed
+
 struct pci_dev_reset_methods pci_dev_reset_methods[] = {
+       { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82599_SFP_VF,
+                reset_intel_82599_sfp_virtfn },
        { PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
                reset_intel_generic_dev },
        { 0 }