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      1 /*	$NetBSD: pci_drvname.c,v 1.3 2021/12/11 19:24:19 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  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __RCSID("$NetBSD: pci_drvname.c,v 1.3 2021/12/11 19:24:19 mrg Exp $");
     31 
     32 #include <sys/types.h>
     33 #include <sys/ioctl.h>
     34 #include <string.h>
     35 
     36 #include <pci.h>
     37 
     38 #include <dev/pci/pciio.h>
     39 
     40 /*
     41  * pci_drvname:
     42  *
     43  *	What's the driver name for a PCI device?
     44  */
     45 int
     46 pci_drvname(int fd, u_int device, u_int func, char *name, size_t len)
     47 {
     48 	struct pciio_drvname drvname;
     49 	int rv;
     50 
     51 	drvname.device = device;
     52 	drvname.function = func;
     53 
     54 	rv = ioctl(fd, PCI_IOC_DRVNAME, &drvname);
     55 	if (rv == -1)
     56 		return -1;
     57 
     58 	strlcpy(name, drvname.name, len);
     59 	return 0;
     60 }
     61 
     62 /*
     63  * pci_drvnameonbus:
     64  *
     65  *	What's the driver name for a PCI device on any PCI bus?
     66  */
     67 int
     68 pci_drvnameonbus(int fd, u_int bus, u_int device, u_int func, char *name,
     69 		 size_t len)
     70 {
     71 	struct pciio_drvnameonbus drvname;
     72 	int rv;
     73 
     74 	drvname.bus = bus;
     75 	drvname.device = device;
     76 	drvname.function = func;
     77 
     78 	rv = ioctl(fd, PCI_IOC_DRVNAMEONBUS, &drvname);
     79 	if (rv == -1)
     80 		return -1;
     81 
     82 	strlcpy(name, drvname.name, len);
     83 	return 0;
     84 }
     85