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man:pciconfig_iobase

PCICONFIG_READ(2) Linux Programmer's Manual PCICONFIG_READ(2)

NAME

     pciconfig_read, pciconfig_write, pciconfig_iobase - pci device informa-
     tion 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 ker-
     nel  PCI  layer,  and  thus  these calls should not normally need to be
     accessed from user space.
     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 phys-
            ical 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   pcicon-
            fig_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 valid only 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 4.16 of the Linux man-pages project.  A
     description of the project, information about reporting bugs,  and  the
     latest     version     of     this    page,    can    be    found    at
     https://www.kernel.org/doc/man-pages/.

Linux 2016-07-17 PCICONFIG_READ(2)

/data/webs/external/dokuwiki/data/pages/man/pciconfig_iobase.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

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