PCI_ENABLE_OBFF(9) Hardware Interfaces PCI_ENABLE_OBFF(9)NAME
pci_enable_obff - enable optimized buffer flush/fill
SYNOPSIS
int pci_enable_obff(struct pci_dev * dev,
enum pci_obff_signal_type type);
ARGUMENTS
dev
PCI device
type
type of signaling to use
DESCRIPTION
Try to enable type OBFF signaling on dev. It will try using WAKE#
signaling if possible, falling back to message signaling only if WAKE#
isnĀ“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.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 PCI_ENABLE_OBFF(9)