xref: /openbmc/linux/drivers/ntb/Kconfig (revision 26b3a37b)
1# SPDX-License-Identifier: GPL-2.0-only
2menuconfig NTB
3	tristate "Non-Transparent Bridge support"
4	depends on PCI
5	help
6	 The PCI-E Non-transparent bridge hardware is a point-to-point PCI-E bus
7	 connecting 2 systems.  When configured, writes to the device's PCI
8	 mapped memory will be mirrored to a buffer on the remote system.  The
9	 ntb Linux driver uses this point-to-point communication as a method to
10	 transfer data from one system to the other.
11
12	 If unsure, say N.
13
14if NTB
15
16config NTB_MSI
17	bool "MSI Interrupt Support"
18	depends on PCI_MSI
19	help
20	 Support using MSI interrupt forwarding instead of (or in addition to)
21	 hardware doorbells. MSI interrupts typically offer lower latency
22	 than doorbells and more MSI interrupts can be made available to
23	 clients. However this requires an extra memory window and support
24	 in the hardware driver for creating the MSI interrupts.
25
26	 If unsure, say N.
27source "drivers/ntb/hw/Kconfig"
28
29source "drivers/ntb/test/Kconfig"
30
31config NTB_TRANSPORT
32	tristate "NTB Transport Client"
33	help
34	 This is a transport driver that enables connected systems to exchange
35	 messages over the ntb hardware.  The transport exposes a queue pair api
36	 to client drivers.
37
38	 If unsure, say N.
39
40endif # NTB
41