23.6.1.5. PCI BFD
lspci -k shows something like:
00:04.0 Class 00ff: 1234:11e8 lkmc_pci
Meaning of the first numbers:
<8:bus>:<5:device>.<3:function>
Often abbreviated to BDF.
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bus: groups PCI slots
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device: maps to one slot
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function: https://stackoverflow.com/questions/19223394/what-is-the-function-number-in-pci/44735372#44735372
Sometimes a fourth number is also added, e.g.:
0000:00:04.0
TODO is that the domain?
Class: pure magic: https://www-s.acm.illinois.edu/sigops/2007/roll_your_own/7.c.1.html TODO: does it have any side effects? Set in the edu device at:
k->class_id = PCI_CLASS_OTHERS