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#
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.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 PCI_ENABLE_OBFF(9)
