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pci_drvname.c revision 1.2 
      1 /*	$NetBSD: pci_drvname.c,v 1.2 2016/09/24 23:12:54 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 1.2 2016/09/24 23:12:54 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 }
     63 
     64 /*
     65  * pci_drvnameonbus:
     66  *
     67  *	What's the driver name for a PCI device on any PCI bus?
     68  */
     69 int
     70 pci_drvnameonbus(int fd, u_int bus, u_int device, u_int func, char *name,
     71 		 size_t len)
     72 {
     73 	struct pciio_drvnameonbus drvname;
     74 	int rv;
     75 
     76 	drvname.bus = bus;
     77 	drvname.device = device;
     78 	drvname.function = func;
     79 
     80 	rv = ioctl(fd, PCI_IOC_DRVNAMEONBUS, &drvname);
     81 	if (rv == -1)
     82 		return -1;
     83 
     84 	strlcpy(name, drvname.name, len);
     85 	return 0;
     86 }
     87