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 3.10 June 2014 PCI_IOMAP(9)
