AIX drivers and how to access the configuration spaces!

[=?gb2312?q?li=20juan?= <hust_lijuan@yahoo.com.cn>]

I have written a device driver for: 

        IBM Power-PC
       AIX 4.3
        PCI board
   
    The problems: How do I specify the physical location of the PCI board ?What is the functions in the kernel for accessing PCI configuration registers? And  is there any 'find device' call just as 'pci_find_device' for Linux?

In detail:
   

    I only find the 'pci_cfgrw' kernel service referring to pci. One of its arguments is the pointer to the struct mdio.One item of the structure is the devfn. I don't know how to find the devfn.There should be a 'find device ' call.But I don't find it. Another function is ger_resid_dev(unsigned long * ,CFG_DEVICE **).I don't know if it is useful and how to use it.

    All help is appreciated.

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