PCI: Remove unused Optimized Buffer Flush/Fill support

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / pci / pci.c

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 020f672..84a24d1 100644 (file)
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2150,79 +2150,6 @@ void pci_disable_ido(struct pci_dev *dev, unsigned long type)
 }
 EXPORT_SYMBOL(pci_disable_ido);
 
-/**
- * pci_enable_obff - enable optimized buffer flush/fill
- * @dev: PCI device
- * @type: type of signaling to use
- *
- * Try to enable @type OBFF signaling on @dev.  It will try using WAKE#
- * signaling if possible, falling back to message signaling only if
- * WAKE# isn't supported.  @type should indicate whether the PCIe link
- * be brought out of L0s or L1 to send the message.  It should be either
- * %PCI_EXP_OBFF_SIGNAL_ALWAYS or %PCI_OBFF_SIGNAL_L0.
- *
- * If your device can benefit from receiving all messages, even at the
- * power cost of bringing the link back up from a low power state, use
- * %PCI_EXP_OBFF_SIGNAL_ALWAYS.  Otherwise, use %PCI_OBFF_SIGNAL_L0 (the
- * preferred type).
- *
- * RETURNS:
- * Zero on success, appropriate error number on failure.
- */
-int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type type)
-{
-       u32 cap;
-       u16 ctrl;
-       int ret;
-
-       pcie_capability_read_dword(dev, PCI_EXP_DEVCAP2, &cap);
-       if (!(cap & PCI_EXP_DEVCAP2_OBFF_MASK))
-               return -ENOTSUPP; /* no OBFF support at all */
-
-       /* Make sure the topology supports OBFF as well */
-       if (dev->bus->self) {
-               ret = pci_enable_obff(dev->bus->self, type);
-               if (ret)
-                       return ret;
-       }
-
-       pcie_capability_read_word(dev, PCI_EXP_DEVCTL2, &ctrl);
-       if (cap & PCI_EXP_DEVCAP2_OBFF_WAKE)
-               ctrl |= PCI_EXP_DEVCTL2_OBFF_WAKE_EN;
-       else {
-               switch (type) {
-               case PCI_EXP_OBFF_SIGNAL_L0:
-                       if (!(ctrl & PCI_EXP_DEVCTL2_OBFF_WAKE_EN))
-                               ctrl |= PCI_EXP_DEVCTL2_OBFF_MSGA_EN;
-                       break;
-               case PCI_EXP_OBFF_SIGNAL_ALWAYS:
-                       ctrl &= ~PCI_EXP_DEVCTL2_OBFF_WAKE_EN;
-                       ctrl |= PCI_EXP_DEVCTL2_OBFF_MSGB_EN;
-                       break;
-               default:
-                       WARN(1, "bad OBFF signal type\n");
-                       return -ENOTSUPP;
-               }
-       }
-       pcie_capability_write_word(dev, PCI_EXP_DEVCTL2, ctrl);
-
-       return 0;
-}
-EXPORT_SYMBOL(pci_enable_obff);
-
-/**
- * pci_disable_obff - disable optimized buffer flush/fill
- * @dev: PCI device
- *
- * Disable OBFF on @dev.
- */
-void pci_disable_obff(struct pci_dev *dev)
-{
-       pcie_capability_clear_word(dev, PCI_EXP_DEVCTL2,
-                                  PCI_EXP_DEVCTL2_OBFF_WAKE_EN);
-}
-EXPORT_SYMBOL(pci_disable_obff);
-
 static int pci_acs_enable;
 
 /**