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pciconfig_write (2)
  • >> pciconfig_write (2) ( Linux man: Системные вызовы )
  •  

    NAME

    pciconfig_read, pciconfig_write, pciconfig_iobase - pci device information handling
     
    

    SYNOPSIS

    #include <pci.h>
    
    int pciconfig_read(unsigned long bus, unsigned long dfn,
              unsigned long off, unsigned long len, void *buf);
    int pciconfig_write(unsigned long bus, unsigned long dfn,
              unsigned long off, unsigned long len, void *buf);
    int pciconfig_iobase(long which, unsigned long bus,
              unsigned long devfn);
    
     

    DESCRIPTION

    Most of the interaction with PCI devices is already handled by the kernel PCI layer, and thus these calls should not normally need to be accessed from userspace.

    pciconfig_read()
    Reads to buf from device dev at offset off value.
    pciconfig_write()
    Writes from buf to device dev at offset off value.
    pciconfig_iobase()
    You pass it a bus/devfn pair and get a physical address for either the memory offset (for things like prep, this is 0xc0000000), the IO base for PIO cycles, or the ISA holes if any.
     

    RETURN VALUE

    pciconfig_read()
    On success zero is returned. On error, -1 is returned and errno is set appropriately.
    pciconfig_write()
    On success zero is returned. On error, -1 is returned and errno is set appropriately.
    pciconfig_iobase()
    Returns information on locations of various I/O regions in physical memory according to the which value. Values for which are: IOBASE_BRIDGE_NUMBER, IOBASE_MEMORY, IOBASE_IO, IOBASE_ISA_IO, IOBASE_ISA_MEM.
     

    ERRORS

    EINVAL
    len value is invalid. This does not apply to pciconfig_iobase().
    EIO
    I/O error.
    ENODEV
    For pciconfig_iobase(), "hose" value is NULL. For the other calls, could not find a slot.
    ENOSYS
    The system has not implemented these calls (CONFIG_PCI not defined).
    EOPNOTSUPP
    This return value is only valid for pciconfig_iobase(). It is returned if the value for which is invalid.
    EPERM
    User does not have the CAP_SYS_ADMIN capability. This does not apply to pciconfig_iobase().
     

    CONFORMING TO

    These calls are Linux-specific, available since Linux 2.0.26/2.1.11.  

    SEE ALSO

    capabilities(7)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    CONFORMING TO
    SEE ALSO
    COLOPHON


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