Message Signaled Interrupts (MSI and MSI-X)

modulename: api.ko

and/or

msi.ko

and/or

msi_ia64.ko

and/or

mpic_msi.ko

and/or

fsl_msi.ko

and/or

msi_sn.ko

configname: CONFIG_PCI_MSI

Linux Kernel Configuration
└─>Bus options (PCI etc.)
└─>Message Signaled Interrupts (MSI and MSI-X)
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This allows device drivers to enable MSI (Message Signaled
Interrupts). Message Signaled Interrupts enable a device to
generate an interrupt using an inbound Memory Write on its
PCI bus instead of asserting a device IRQ pin.

Use of PCI MSI interrupts can be disabled at kernel boot time
by using the 'pci=nomsi' option. This disables MSI for the
entire system.

If you don't know what to do here, say Y.

source code:
/arch/arm/mach-iop13xx/msi.c
selects
CONFIG_GENERIC_MSI_IRQ

depends
CONFIG_PCI