95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
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/* $NetBSD: pci_bus.c,v 1.1 2001/09/13 22:52:20 thorpej Exp $ */
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/*
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Interface to PCI config space registers for a PCI domain.
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*/
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <pci.h>
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#include <dev/pci/pciio.h>
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/*
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* pcibus_conf_read:
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*
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* Read a config word for a given bus/device/function.
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*/
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int
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pcibus_conf_read(int fd, u_int bus, u_int device, u_int func, u_int reg,
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uint32_t *valp)
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{
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struct pciio_bdf_cfgreg bdfr;
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int rv;
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bdfr.bus = bus;
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bdfr.device = device;
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bdfr.function = func;
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bdfr.cfgreg.reg = reg;
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rv = ioctl(fd, PCI_IOC_BDF_CFGREAD, &bdfr);
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if (rv == -1) {
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/* errno already set. */
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return (-1);
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}
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*valp = bdfr.cfgreg.val;
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return (0);
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}
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/*
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* pcibus_conf_write:
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*
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* Write a config word for a given bus/device/function.
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*/
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int
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pcibus_conf_write(int fd, u_int bus, u_int device, u_int func, u_int reg,
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uint32_t val)
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{
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struct pciio_bdf_cfgreg bdfr;
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bdfr.bus = bus;
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bdfr.device = device;
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bdfr.function = func;
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bdfr.cfgreg.reg = reg;
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bdfr.cfgreg.val = val;
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return (ioctl(fd, PCI_IOC_BDF_CFGWRITE, &bdfr));
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}
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