I’m seeing a lot of renewed interest in FreeBSD from GNU/Linux people. This is encouraging! You should be familiar with much of the userland, but there are a few differences, which I hope this new post series will help with.
lspsi is a common tool for listing PCI devices, as the name may suggest. For example, in a Xen domU:
00:02.0 Unassigned class [ff80]: XenSource, Inc. Xen Platform Device (rev 01) 00:03.0 VGA compatible controller: Cirrus Logic GD 5446 (prog-if 00 [VGA controller])
The broad equivilent is
xenpci0@pci0:0:2:0: class=0xff8000 card=0x00015853 chip=0x00015853 rev=0x01 hdr=0x00 vendor = 'XenSource, Inc.' device = 'Xen Platform Device' vgapci0@pci0:0:3:0: class=0x030000 card=0x11001af4 chip=0x00b81013 rev=0x00 hdr=0x00 vendor = 'Cirrus Logic' device = 'GD 5446' class = display subclass = VGA
Note the subtle differences with the PCI addresses, which you’ll need to tweak your scripts for if you parse them.