1 /* $NetBSD: pci_bus.c,v 1.2 2003/03/08 09:53:45 lukem Exp $ */ 2 3 /* 4 * Copyright 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Interface to PCI config space registers for a PCI domain. 40 */ 41 42 #include <sys/cdefs.h> 43 __RCSID("$NetBSD: pci_bus.c,v 1.2 2003/03/08 09:53:45 lukem Exp $"); 44 45 #include <sys/types.h> 46 #include <sys/ioctl.h> 47 48 #include <pci.h> 49 50 #include <dev/pci/pciio.h> 51 52 /* 53 * pcibus_conf_read: 54 * 55 * Read a config word for a given bus/device/function. 56 */ 57 int 58 pcibus_conf_read(int fd, u_int bus, u_int device, u_int func, u_int reg, 59 uint32_t *valp) 60 { 61 struct pciio_bdf_cfgreg bdfr; 62 int rv; 63 64 bdfr.bus = bus; 65 bdfr.device = device; 66 bdfr.function = func; 67 bdfr.cfgreg.reg = reg; 68 69 rv = ioctl(fd, PCI_IOC_BDF_CFGREAD, &bdfr); 70 if (rv == -1) { 71 /* errno already set. */ 72 return (-1); 73 } 74 75 *valp = bdfr.cfgreg.val; 76 return (0); 77 } 78 79 /* 80 * pcibus_conf_write: 81 * 82 * Write a config word for a given bus/device/function. 83 */ 84 int 85 pcibus_conf_write(int fd, u_int bus, u_int device, u_int func, u_int reg, 86 uint32_t val) 87 { 88 struct pciio_bdf_cfgreg bdfr; 89 90 bdfr.bus = bus; 91 bdfr.device = device; 92 bdfr.function = func; 93 bdfr.cfgreg.reg = reg; 94 bdfr.cfgreg.val = val; 95 96 return (ioctl(fd, PCI_IOC_BDF_CFGWRITE, &bdfr)); 97 } 98