table of contents
| 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 (optional)
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¶
| June 2024 | Kernel Hackers Manual 3.10 |