lib/libpci/pci_drvname.c

   1 /*      $NetBSD: pci_drvname.c,v 1.1 2014/07/25 01:38:26 mrg Exp $      */
   2
   3 /*
   4  * Copyright (c) 2014 Matthew R. Green
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  23  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  26  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __RCSID("$NetBSD: pci_drvname.c,v 1.1 2014/07/25 01:38:26 mrg Exp $");
  33
  34 #include <sys/types.h>
  35 #include <sys/ioctl.h>
  36 #include <string.h>
  37
  38 #include <pci.h>
  39
  40 #include <dev/pci/pciio.h>
  41
  42 /*
  43  * pci_drvname:
  44  *
  45  *      What's the driver name for a PCI device?
  46  */
  47 int
  48 pci_drvname(int fd, u_int device, u_int func, char *name, size_t len)
  49 {
  50         struct pciio_drvname drvname;
  51         int rv;
  52
  53         drvname.device = device;
  54         drvname.function = func;
  55
  56         rv = ioctl(fd, PCI_IOC_DRVNAME, &drvname);
  57         if (rv == -1)
  58                 return -1;
  59
  60         strlcpy(name, drvname.name, len);
  61         return 0;
  62 }