pci_read_legacy_io(9) centos man page | unix.com

PCI_READ_LEGACY_IO(9)						Hardware Interfaces					     PCI_READ_LEGACY_IO(9)

NAME
       pci_read_legacy_io - read byte(s) from legacy I/O port space

SYNOPSIS
       ssize_t pci_read_legacy_io(struct file * filp, struct kobject * kobj, struct bin_attribute * bin_attr, char * buf, loff_t off,
				  size_t count);

ARGUMENTS
       filp
	   open sysfs file

       kobj
	   kobject corresponding to file to read from

       bin_attr
	   struct bin_attribute for this file

       buf
	   buffer to store results

       off
	   offset into legacy I/O port space

       count
	   number of bytes to read

DESCRIPTION
       Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific callback routine (pci_legacy_read).

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						     PCI_READ_LEGACY_IO(9)