suse man page for pci_iomap

PCI_IOMAP(9)						     Public Functions Provided						      PCI_IOMAP(9)

NAME
       pci_iomap - create a virtual mapping cookie for a PCI BAR

SYNOPSIS
       void __iomem * pci_iomap(struct pci_dev * dev, int bar, unsigned long maxlen);

ARGUMENTS
       dev
	   PCI device that owns the BAR

       bar
	   BAR number

       maxlen
	   length of the memory to map

DESCRIPTION
       Using this function you will get a __iomem address to your device BAR. You can access it using ioread*() and iowrite*(). These functions
       hide the details if this is a MMIO or PIO address space and will just do what you expect from them in the correct way.

       maxlen specifies the maximum length to map. If you want to get access to the complete BAR without checking for its length first, pass 0
       here.

AUTHORS
       Matthew Wilcox <matthew@wil.cx>
	   Author.

       Alan Cox <alan@lxorguk.ukuu.org.uk>
	   Author.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							      PCI_IOMAP(9)