1$NetBSD: pci_calls,v 1.1 2021/09/15 17:26:07 thorpej Exp $ 2 3/*- 4 * Copyright (c) 2021 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32/* 33 * Device calls used by the PCI subsystem. 34 */ 35 36subsystem pci; 37 38#include <dev/pci/pcivar.h> 39 40/* 41 * pci-bus-get-child-devhandle 42 * 43 * Retrieve the devhandle for the PCI device represented by 'tag' 44 * in the PCI segment represented by 'pc'. The PCI bus's device_t 45 * is the one that's passed in the call, and the device whose handle 46 * is being requested must be a direct child of that bus, otherwise 47 * behavior is undefined. 48 * 49 * Call returns 0 if successful, or an error code upon failure: 50 * 51 * ENOTSUP The device handle implementation for the 52 * PCI bus does not support this device call. 53 * 54 * ENODEV The PCI device represented by the pcitag_t 55 * was not found in a bus-scoped search of the 56 * platform device tree. 57 */ 58pci-bus-get-child-devhandle { 59 pci_chipset_tag_t pc; /* IN */ 60 pcitag_t tag; /* IN */ 61 devhandle_t devhandle; /* OUT */ 62}; 63