63 lines
2.4 KiB
Plaintext
63 lines
2.4 KiB
Plaintext
$NetBSD: pci_calls,v 1.1 2021/09/15 17:26:07 thorpej Exp $
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/*-
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* Copyright (c) 2021 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND 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 THE FOUNDATION OR CONTRIBUTORS
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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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* Device calls used by the PCI subsystem.
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*/
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subsystem pci;
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#include <dev/pci/pcivar.h>
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/*
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* pci-bus-get-child-devhandle
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*
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* Retrieve the devhandle for the PCI device represented by 'tag'
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* in the PCI segment represented by 'pc'. The PCI bus's device_t
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* is the one that's passed in the call, and the device whose handle
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* is being requested must be a direct child of that bus, otherwise
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* behavior is undefined.
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*
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* Call returns 0 if successful, or an error code upon failure:
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*
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* ENOTSUP The device handle implementation for the
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* PCI bus does not support this device call.
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*
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* ENODEV The PCI device represented by the pcitag_t
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* was not found in a bus-scoped search of the
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* platform device tree.
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*/
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pci-bus-get-child-devhandle {
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pci_chipset_tag_t pc; /* IN */
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pcitag_t tag; /* IN */
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devhandle_t devhandle; /* OUT */
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};
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