PCI Endpoint NTB driver

modulename: pci-epf-ntb.ko

configname: CONFIG_PCI_EPF_NTB

Linux Kernel Configuration
└─>Device Drivers
└─>PCI support
└─>PCI Endpoint
└─>PCI Endpoint NTB driver
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Select this configuration option to enable the Non-Transparent
Bridge (NTB) driver for PCI Endpoint. NTB driver implements NTB
controller functionality using multiple PCIe endpoint instances.
It can support NTB endpoint function devices created using
device tree.

If in doubt, say "N" to disable Endpoint NTB driver.

source code: