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 available. Driver should use the returned value to re-send its
request.