pci_enable_obff — enable optimized buffer flush/fill
int pci_enable_obff ( | struct pci_dev * dev, |
enum pci_obff_signal_type type); |
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).