PCI_IOMAP_RANGE(9) | Public Functions Provided | PCI_IOMAP_RANGE(9) |
NAME¶
pci_iomap_range - create a virtual mapping cookie for a PCI BAR
SYNOPSIS¶
void __iomem * pci_iomap_range(struct pci_dev * dev, int bar, unsigned long offset, unsigned long maxlen);
ARGUMENTS¶
dev
bar
offset
maxlen
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 from offset to the end, pass 0 here.
AUTHORS¶
Matthew Wilcox <matthew@wil.cx>
Alan Cox <alan@lxorguk.ukuu.org.uk>
COPYRIGHT¶
March 2017 | Kernel Hackers Manual 4.10 |