1PCI_IOMAP(9)               Public Functions Provided              PCI_IOMAP(9)
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NAME

6       pci_iomap - create a virtual mapping cookie for a PCI BAR
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SYNOPSIS

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

13       dev
14           PCI device that owns the BAR
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16       bar
17           BAR number
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19       maxlen
20           length of the memory to map
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DESCRIPTION

23       Using this function you will get a __iomem address to your device BAR.
24       You can access it using ioread*() and iowrite*(). These functions hide
25       the details if this is a MMIO or PIO address space and will just do
26       what you expect from them in the correct way.
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28       maxlen specifies the maximum length to map. If you want to get access
29       to the complete BAR without checking for its length first, pass 0 here.
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AUTHORS

32       Matthew Wilcox <matthew@wil.cx>
33           Author.
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35       Alan Cox <alan@lxorguk.ukuu.org.uk>
36           Author.
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39Kernel Hackers Manual 3.10         June 2019                      PCI_IOMAP(9)
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