Re: [LinuxBIOS] The device number of PCIe

[Ed Swierk]

On 1/6/08, Feng, Libo  wrote:
> In PCI, the IDSEL pin defines the device number. But in PCIe, there is no
> such pin, how is the device number defined?

"Each PCI Express Link is equivalent to a logical PCI bus. In other
words, each Link is assigned a bus number by the bus enumerating
software. A PCI Express endpoint is device 0 on a PCI Express Link of
a given bus number. Only one device (device 0) exists per PCI Express
Link."

-- PCI Express System Architecture, p. 51

--Ed