Re: nhi0: Cannot find Upstream Facing Port
- Reply: Tomoaki AOKI : "Re: nhi0: Cannot find Upstream Facing Port"
- In reply to: Lars Engels : "Re: nhi0: Cannot find Upstream Facing Port"
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Date: Tue, 16 Jun 2026 22:21:36 UTC
On Tue, 16 Jun 2026 22:32:31 +0200
Lars Engels <lars.engels@0x20.net> wrote:
> On Mon, Jun 15, 2026 at 08:40:19PM -0700, Enji Cooper (yaneurabeya) wrote:
> >
> > > On Jun 14, 2026, at 11:19 PM, Chris Torek <chris.torek@gmail.com> wrote:
> > >
> > > Noticed that there's some new thunderbolt code. I get this during boot:
> > >
> > > pci3: <PCI bus> on pcib3
> > > nhi0: <Generic USB4 NHI> at device 0.0 on pci3
> > > nhi0: Cannot find Upstream Facing Port
> > > nhi0: tb_router_attach_root() error. The driver should be loaded at boot
> > >
> > > If it helps any, here's some "pciconf -lv" output snippets:
> > >
> > > pcib2@pci0:1:0:0: class=0x060400 rev=0x02 hdr=0x01 vendor=0x8086 device=0x
> > > 1136 subvendor=0x8086 subdevice=0x0000
> > > vendor = 'Intel Corporation'
> > > device = 'Thunderbolt 4 Bridge [Maple Ridge 4C 2020]'
> > > class = bridge
> > > subclass = PCI-PCI
> > > pcib3@pci0:2:0:0: class=0x060400 rev=0x02 hdr=0x01 vendor=0x8086 device=0x
> > > 1136 subvendor=0x8086 subdevice=0x0000
> > > vendor = 'Intel Corporation'
> > > device = 'Thunderbolt 4 Bridge [Maple Ridge 4C 2020]'
> > > class = bridge
> > > subclass = PCI-PCI
> > > pcib4@pci0:2:1:0: class=0x060400 rev=0x02 hdr=0x01 vendor=0x8086 device=0x
> > > 1136 subvendor=0x8086 subdevice=0x0000
> > > vendor = 'Intel Corporation'
> > > device = 'Thunderbolt 4 Bridge [Maple Ridge 4C 2020]'
> > > class = bridge
> > > subclass = PCI-PCI
> > >
> > > Can include more if needed. System works fine without whatever it's
> > > trying to do (of course, since it wasn't even detected before :-) )
> >
> > Hi Chris,
> > I lit up the code in GENERIC in 886164895f — so that’s my fault :) (any info about the thunderbolt devices would be appreciated!). obiwac@ asked that I back it out, so I’ll take care of that now since it’s on my mind.
> > Thanks!
> > -Enji
> >
> > PS The thunderbolt(4) device implementation is incomplete: it was based on work done by hselasky@ before he passed away back in 2023. I have a TODO item to look at trying and get it working (enough) to have functional Thunderbolt/USB4 stack for storage purposes, but it’s way down my TODO list. tl;dr: I’m trying to get a partially functional Mac x86 port before Apple nukes Intel support from macOS.
>
>
> I am seeing the same error message on AMD hardware.
>
> # pciconf -lv|rg -A4 nhi
> nhi0@pci0:195:0:5: class=0x0c0340 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1668 subvendor=0xf111 subdevice=0x0006
> vendor = 'Advanced Micro Devices, Inc. [AMD]'
> device = 'Pink Sardine USB4/Thunderbolt NHI controller'
> class = serial bus
> subclass = USB
> nhi1@pci0:195:0:6: class=0x0c0340 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1669 subvendor=0xf111 subdevice=0x0006
> vendor = 'Advanced Micro Devices, Inc. [AMD]'
> device = 'Pink Sardine USB4/Thunderbolt NHI controller'
> class = serial bus
> subclass = USB
For me (on MinisForum MS-01), I see below in last dmesg.today:
(snip)
nhi0: <Generic USB4 NHI> mem
0x414e440000-0x414e47ffff,0x414e4ac000-0x414e4acfff at device 13.2 on
pci0
nhi0: Cannot find Upstream Facing Port
nhi0: tb_router_attach_root() error. The driver should be loaded at
boot device_attach: nhi0 attach returned 60
nhi0: <Generic USB4 NHI> mem
0x414e400000-0x414e43ffff,0x414e4ab000-0x414e4abfff at device 13.3 on
pci0
nhi0: Cannot find Upstream Facing Port
nhi0: tb_router_attach_root() error. The driver should be loaded at
boot device_attach: nhi0 attach returned 60
(snip)
nhi0: <Generic USB4 NHI> mem
0x414e440000-0x414e47ffff,0x414e4ac000-0x414e4acfff at device 13.2 on
pci0 nhi0: Cannot find Upstream Facing Port
nhi0: tb_router_attach_root() error. The driver should be loaded at
boot device_attach: nhi0 attach returned 60
nhi0: <Generic USB4 NHI> mem
0x414e400000-0x414e43ffff,0x414e4ab000-0x414e4abfff at device 13.3 on
pci0
nhi0: Cannot find Upstream Facing Port
nhi0: tb_router_attach_root() error. The driver should be loaded at
boot
device_attach: nhi0 attach returned 60
(snip)
nhi0: <Generic USB4 NHI> mem
0x414e440000-0x414e47ffff,0x414e4ac000-0x414e4acfff at device 13.2 on
pci0
nhi0: Cannot find Upstream Facing Port
nhi0: tb_router_attach_root() error. The driver should be loaded at
boot
device_attach: nhi0 attach returned 60
nhi0: <Generic USB4 NHI> mem
0x414e400000-0x414e43ffff,0x414e4ab000-0x414e4abfff at device 13.3 on
pci0
nhi0: Cannot find Upstream Facing Port
nhi0: tb_router_attach_root() error. The driver should be loaded at
boot
device_attach: nhi0 attach returned 60
(snip to end of file)
And related `pciconf -lv` output on stable/15 (sorry, cannot switch
to main for now, but on exactly same hardware on different SSD):
(snip)
pcib4@pci0:0:7:0: class=0x060400 rev=0x02 hdr=0x01 vendor=0x8086
device=0x466e subvendor=0x0000 subdevice=0x0000 vendor = 'Intel
Corporation' device = 'Alder Lake-P Thunderbolt 4 PCI Express Root
Port' class = bridge
subclass = PCI-PCI
pcib5@pci0:0:7:2: class=0x060400 rev=0x02 hdr=0x01 vendor=0x8086
device=0x462f subvendor=0x0000 subdevice=0x0000 vendor = 'Intel
Corporation' device = 'Alder Lake-P Thunderbolt 4 PCI Express Root
Port' class = bridge
subclass = PCI-PCI
xhci0@pci0:0:13:0: class=0x0c0330 rev=0x02 hdr=0x00
vendor=0x8086 device=0x461e subvendor=0x0000 subdevice=0x0000
vendor = 'Intel Corporation' device = 'Alder Lake-P Thunderbolt
4 USB Controller' class = serial bus
subclass = USB
none0@pci0:0:13:2: class=0x0c0340 rev=0x02 hdr=0x00
vendor=0x8086 device=0x463e subvendor=0x2222 subdevice=0x1111
vendor = 'Intel Corporation' device = 'Alder Lake-P Thunderbolt
4 NHI' class = serial bus
subclass = USB
none1@pci0:0:13:3: class=0x0c0340 rev=0x02 hdr=0x00
vendor=0x8086 device=0x466d subvendor=0x2222 subdevice=0x1111
vendor = 'Intel Corporation' device = 'Alder Lake-P Thunderbolt
4 NHI' class = serial bus
subclass = USB
(snip to the end)
I'll obtain the output once I could switch to main and report again.
Regards.
--
Tomoaki AOKI <junchoon@dec.sakura.ne.jp>