1PCI_READ_LEGACY_IO(9)         Hardware Interfaces        PCI_READ_LEGACY_IO(9)
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NAME

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

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

14       filp
15           open sysfs file
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17       kobj
18           kobject corresponding to file to read from
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20       bin_attr
21           struct bin_attribute for this file
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23       buf
24           buffer to store results
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26       off
27           offset into legacy I/O port space
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29       count
30           number of bytes to read
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DESCRIPTION

33       Reads 1, 2, or 4 bytes from legacy I/O port space using an arch
34       specific callback routine (pci_legacy_read).
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37Kernel Hackers Manual 3.10         June 2019             PCI_READ_LEGACY_IO(9)
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