289 lines
12 KiB
C
289 lines
12 KiB
C
/*
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* Pci.c - New server PCI access functions
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*
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* The XFree86 server PCI access functions have been reimplemented as a
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* framework that allows each supported platform/OS to have their own
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* platform/OS specific pci driver.
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*
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* All of the public PCI access functions exported to the other parts of
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* the server are declared in Pci.h and defined herein. These include:
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* pciInit() - Initialize PCI access functions
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* pciReadLong() - Read a 32 bit value from a device's cfg space
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* pciReadWord() - Read a 16 bit value from a device's cfg space
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* pciReadByte() - Read an 8 bit value from a device's cfg space
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* pciWriteLong() - Write a 32 bit value to a device's cfg space
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* pciWriteWord() - Write a 16 bit value to a device's cfg space
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* pciWriteByte() - Write an 8 bit value to a device's cfg space
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* pciSetBitsLong() - Write a 32 bit value against a mask
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* pciSetBitsByte() - Write an 8 bit value against a mask
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* pciTag() - Return tag for a given PCI bus, device, &
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* function
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* pciBusAddrToHostAddr() - Convert a PCI address to a host address
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* xf86scanpci() - Return info about all PCI devices
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* xf86MapDomainMemory() - Like xf86MapPciMem() but can handle
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* domain/host address translation
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* xf86MapLegacyIO() - Maps PCI I/O spaces
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*
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* The actual PCI backend driver is selected by the pciInit() function
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* (see below) using either compile time definitions, run-time checks,
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* or both.
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*
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* Certain generic functions are provided that make the implementation
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* of certain well behaved platforms (e.g. those supporting PCI config
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* mechanism 1 or some thing close to it) very easy.
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*
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* Less well behaved platforms/OS's can roll their own functions.
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*
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* To add support for another platform/OS, add a call to fooPciInit() within
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* pciInit() below under the correct compile time definition or run-time
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* conditional.
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*
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* The fooPciInit() procedure must do three things:
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* 1) Initialize the pciBusTable[] for all primary PCI buses including
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* the per domain PCI access functions (readLong, writeLong,
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* addrBusToHost, and addrHostToBus).
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*
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* 2) Add entries to pciBusTable[] for configured secondary buses. This
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* step may be skipped if a platform is using the generic findFirst/
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* findNext functions because these procedures will automatically
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* discover and add secondary buses dynamically.
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*
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* 3) Overide default settings for global PCI access functions if
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* required. These include pciFindFirstFP, pciFindNextFP,
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* Of course, if you choose not to use one of the generic
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* functions, you will need to provide a platform specifc replacement.
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*
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* Gary Barton
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* Concurrent Computer Corporation
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* garyb@gate.net
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*
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*/
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/*
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* Copyright 1998 by Concurrent Computer Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of Concurrent Computer
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* Corporation not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Concurrent Computer Corporation makes no representations
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* about the suitability of this software for any purpose. It is
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* provided "as is" without express or implied warranty.
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*
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* CONCURRENT COMPUTER CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD
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* TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS, IN NO EVENT SHALL CONCURRENT COMPUTER CORPORATION BE
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* LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
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* DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*
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* Copyright 1998 by Metro Link Incorporated
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of Metro Link
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* Incorporated not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Metro Link Incorporated makes no representations
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* about the suitability of this software for any purpose. It is
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* provided "as is" without express or implied warranty.
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*
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* METRO LINK INCORPORATED DISCLAIMS ALL WARRANTIES WITH REGARD
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* TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS, IN NO EVENT SHALL METRO LINK INCORPORATED BE
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* LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
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* DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*
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* This software is derived from the original XFree86 PCI code
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* which includes the following copyright notices as well:
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*
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* Copyright 1995 by Robin Cutshaw <robin@XFree86.Org>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the names of the above listed copyright holder(s)
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* not be used in advertising or publicity pertaining to distribution of
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* the software without specific, written prior permission. The above listed
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* copyright holder(s) make(s) no representations about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*
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* THE ABOVE LISTED COPYRIGHT HOLDER(S) DISCLAIM(S) ALL WARRANTIES WITH REGARD
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* TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE
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* LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
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* DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* This code is also based heavily on the code in FreeBSD-current, which was
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* written by Wolfgang Stanglmeier, and contains the following copyright:
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*
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* Copyright (c) 1999-2003 by The XFree86 Project, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the copyright holder(s)
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* and author(s) shall not be used in advertising or otherwise to promote
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* the sale, use or other dealings in this Software without prior written
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* authorization from the copyright holder(s) and author(s).
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <errno.h>
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#include <signal.h>
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#include <X11/Xarch.h>
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#include "compiler.h"
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#include "xf86.h"
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#include "xf86Priv.h"
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#define XF86_OS_PRIVS
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#include "xf86_OSproc.h"
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#include "Pci.h"
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#include <pciaccess.h>
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#if 0
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#endif
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#define PCI_MFDEV_SUPPORT 1 /* Include PCI multifunction device support */
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#define PCI_BRIDGE_SUPPORT 1 /* Include support for PCI-to-PCI bridges */
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/*
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* Global data
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*/
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pciBusInfo_t *pciBusInfo[MAX_PCI_BUSES] = { NULL, };
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_X_EXPORT int pciNumBuses = 0; /* Actual number of PCI buses */
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int pciMaxBusNum = MAX_PCI_BUSES;
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/*
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* pciInit - choose correct platform/OS specific PCI init routine
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*/
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static void
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pciInit(void)
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{
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static int pciInitialized = 0;
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if (!pciInitialized) {
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pciInitialized = 1;
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/* XXX */
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#if defined(DEBUGPCI)
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if (DEBUGPCI >= xf86Verbose) {
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xf86Verbose = DEBUGPCI;
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}
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#endif
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ARCH_PCI_INIT();
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}
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}
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_X_EXPORT ADDRESS
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pciBusAddrToHostAddr(PCITAG tag, PciAddrType type, ADDRESS addr)
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{
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int bus = PCI_BUS_FROM_TAG(tag);
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pciInit();
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if ((bus >= 0) && (bus < pciNumBuses) && pciBusInfo[bus] &&
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pciBusInfo[bus]->funcs->pciAddrBusToHost)
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return (*pciBusInfo[bus]->funcs->pciAddrBusToHost)(tag, type, addr);
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else
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return(addr);
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}
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_X_EXPORT PCITAG
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pciTag(int busnum, int devnum, int funcnum)
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{
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return(PCI_MAKE_TAG(busnum,devnum,funcnum));
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}
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ADDRESS
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pciAddrNOOP(PCITAG tag, PciAddrType type, ADDRESS addr)
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{
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return(addr);
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}
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_X_EXPORT Bool
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xf86scanpci(void)
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{
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static Bool done = FALSE;
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static Bool success = FALSE;
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/*
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* if we haven't found PCI devices checking for pci_devp may
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* result in an endless recursion if platform/OS specific PCI
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* bus probing code calls this function from with in it.
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*/
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if (done)
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return success;
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done = TRUE;
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success = (pci_system_init() == 0);
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pciInit();
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return success;
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}
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