PCI_ENABLE_MSIX(9) Hardware Interfaces PCI_ENABLE_MSIX(9)
NAME
pci_enable_msix - configure device's MSI-X capability structure
SYNOPSIS
int pci_enable_msix(struct pci_dev * dev, struct msix_entry * entries, int nvec);
ARGUMENTS
dev
pointer to the pci_dev data structure of MSI-X device function
entries
pointer to an array of MSI-X entries
nvec
number of MSI-X irqs requested for allocation by device driver
DESCRIPTION
Setup the MSI-X capability structure of device function with the number of requested irqs upon its software driver call to request for
MSI-X mode enabled on its hardware device function. A return of zero indicates the successful configuration of MSI-X capability structure
with new allocated MSI-X irqs. A return of < 0 indicates a failure. Or a return of > 0 indicates that driver request is exceeding the
number of irqs or MSI-X vectors available. Driver should use the returned value to re-send its request.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 PCI_ENABLE_MSIX(9)
