/*      $NetBSD: pci_drvname.c,v 1.3 2021/12/11 19:24:19 mrg Exp $      */

/*
* Copyright (c) 2014 Matthew R. Green
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: pci_drvname.c,v 1.3 2021/12/11 19:24:19 mrg Exp $");

#include <sys/types.h>
#include <sys/ioctl.h>
#include <string.h>

#include <pci.h>

#include <dev/pci/pciio.h>

/*
* pci_drvname:
*
*      What's the driver name for a PCI device?
*/
int
pci_drvname(int fd, u_int device, u_int func, char *name, size_t len)
{
       struct pciio_drvname drvname;
       int rv;

       drvname.device = device;
       drvname.function = func;

       rv = ioctl(fd, PCI_IOC_DRVNAME, &drvname);
       if (rv == -1)
               return -1;

       strlcpy(name, drvname.name, len);
       return 0;
}

/*
* pci_drvnameonbus:
*
*      What's the driver name for a PCI device on any PCI bus?
*/
int
pci_drvnameonbus(int fd, u_int bus, u_int device, u_int func, char *name,
                size_t len)
{
       struct pciio_drvnameonbus drvname;
       int rv;

       drvname.bus = bus;
       drvname.device = device;
       drvname.function = func;

       rv = ioctl(fd, PCI_IOC_DRVNAMEONBUS, &drvname);
       if (rv == -1)
               return -1;

       strlcpy(name, drvname.name, len);
       return 0;
}