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authorAlex Williamson <alex.williamson@redhat.com>2014-02-03 14:27:33 -0700
committerBjorn Helgaas <bhelgaas@google.com>2014-02-11 13:49:56 -0700
commit2c74424470a0f98df8d6540642aff96d1a0b94b3 (patch)
tree61f24a066645ddd7884d8545b579e0754c2763ce /drivers/pci/quirks.c
parent38dbfb59d1175ef458d006556061adeaa8751b72 (diff)
PCI: Add device-specific PCI ACS enable
Some devices support PCI ACS-like features, but don't report it using the standard PCIe capabilities. We already provide hooks for device-specific testing of ACS, but not for device-specific enabling of ACS. This provides that setup hook. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/quirks.c')
-rw-r--r--drivers/pci/quirks.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 5cb726c193d..f681fb08f5e 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3461,3 +3461,28 @@ int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags)
return -ENOTTY;
}
+
+static const struct pci_dev_enable_acs {
+ u16 vendor;
+ u16 device;
+ int (*enable_acs)(struct pci_dev *dev);
+} pci_dev_enable_acs[] = {
+ { 0 }
+};
+
+void pci_dev_specific_enable_acs(struct pci_dev *dev)
+{
+ const struct pci_dev_enable_acs *i;
+ int ret;
+
+ for (i = pci_dev_enable_acs; i->enable_acs; i++) {
+ if ((i->vendor == dev->vendor ||
+ i->vendor == (u16)PCI_ANY_ID) &&
+ (i->device == dev->device ||
+ i->device == (u16)PCI_ANY_ID)) {
+ ret = i->enable_acs(dev);
+ if (ret >= 0)
+ return;
+ }
+ }
+}