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>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index cf96776d4bbf..8726698866b1 100644
--- 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 }