https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241774

--- Comment #43 from Tommy P <tommy...@gmail.com> ---
(In reply to Vincenzo Maffione from comment #35)

Hi Vincenzo,

I came to the same conclusion just now too:

ptnetmap-memdev0: <ptnetmap-memdev PCI adapter> mem 0xfd412000-0xfd412fff irq
22 at device 2.0 on pci0
000.000080 [ 871] ptn_memdev_attach         ptn_memdev_driver attach
ptnetmap-memdev0: cannot map I/O space
device_attach: ptnetmap-memdev0 attach returned 6

If I'm correct, it looks like netmap is trying to attach PCIe device on a PCI
bus.  What I find puzzling is that netmap supports igb
(sys/dev/netmap/if_igb_netmap.h) which is PCIe (I don't have an igb to verify)
but somehow fail to attach other PCIe devices:

https://www.freebsd.org/cgi/man.cgi?query=igb&apropos=0&sektion=4&manpath=FreeBSD+12.1-RELEASE+and+Ports&arch=default&format=html

Thanks,
Tommy

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