1 /* $NetBSD: pci_bus.c,v 1.1 2001/09/13 22:52:20 thorpej 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/types.h> 43 #include <sys/ioctl.h> 44 45 #include <pci.h> 46 47 #include <dev/pci/pciio.h> 48 49 /* 50 * pcibus_conf_read: 51 * 52 * Read a config word for a given bus/device/function. 53 */ 54 int 55 pcibus_conf_read(int fd, u_int bus, u_int device, u_int func, u_int reg, 56 uint32_t *valp) 57 { 58 struct pciio_bdf_cfgreg bdfr; 59 int rv; 60 61 bdfr.bus = bus; 62 bdfr.device = device; 63 bdfr.function = func; 64 bdfr.cfgreg.reg = reg; 65 66 rv = ioctl(fd, PCI_IOC_BDF_CFGREAD, &bdfr); 67 if (rv == -1) { 68 /* errno already set. */ 69 return (-1); 70 } 71 72 *valp = bdfr.cfgreg.val; 73 return (0); 74 } 75 76 /* 77 * pcibus_conf_write: 78 * 79 * Write a config word for a given bus/device/function. 80 */ 81 int 82 pcibus_conf_write(int fd, u_int bus, u_int device, u_int func, u_int reg, 83 uint32_t val) 84 { 85 struct pciio_bdf_cfgreg bdfr; 86 87 bdfr.bus = bus; 88 bdfr.device = device; 89 bdfr.function = func; 90 bdfr.cfgreg.reg = reg; 91 bdfr.cfgreg.val = val; 92 93 return (ioctl(fd, PCI_IOC_BDF_CFGWRITE, &bdfr)); 94 } 95