Bus location setting
Name
busloc
Details
| Type | 32-bit unsigned integer |
|---|---|
| DHCP option number | not applicable |
| ISC dhcpd syntax | not applicable |
Examples
Display the bus location of interface "net0"
iPXE> show net0/busloc net0/busloc:uint32 = 0x18
Display the bus location of interface "net0" as a PCI bus:dev.fn address
iPXE> show net0/busloc:busdevfn net0/busloc:busdevfn = 00:03.0
Retrieve the PCI vendor and device IDs of interface "net0"
echo net0 has IDs ${pci/${net0/busloc}.0.2}:${pci/${net0/busloc}.2.2}
Description
Describes the location on the hardware bus to which the network device is attached. For example, the location of a PCI device will be its bus:dev.fn address.
See also
Notes
The bus location is formatted as an opaque 32-bit unsigned integer. If you know the bus type, then you can choose to interpret the bus location in a type-specific way. For example:
iseq ${net0/bustype} PCI && echo ${net0/busloc:busdevfn} || echo ${net0/busloc}
For PCI devices, the bus location can be used to extract information from PCI configuration space. For example, to dump the first 64 bytes of PCI configuration space for interface “net0”:
show pci/${net0/busloc}.0.64
