496 lines
13 KiB
C
496 lines
13 KiB
C
/* $NetBSD: if_media.c,v 1.13 2001/02/26 09:42:00 joda Exp $ */
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/*-
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* Copyright (c) 1998 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 of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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 by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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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* Copyright (c) 1997
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* Jonathan Stone and Jason R. Thorpe. All rights reserved.
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*
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* This software is derived from information provided by Matt Thomas.
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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 by Jonathan Stone
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* and Jason R. Thorpe for the NetBSD Project.
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* 4. The names of the authors 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 AUTHORS ``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,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* BSD/OS-compatible network interface media selection.
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*
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* Where it is safe to do so, this code strays slightly from the BSD/OS
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* design. Software which uses the API (device drivers, basically)
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* shouldn't notice any difference.
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*
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* Many thanks to Matt Thomas for providing the information necessary
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* to implement this interface.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/malloc.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/netisr.h>
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/*
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* Compile-time options:
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* IFMEDIA_DEBUG:
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* turn on implementation-level debug printfs.
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* Useful for debugging newly-ported drivers.
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*/
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#ifdef IFMEDIA_DEBUG
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int ifmedia_debug = 0;
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static void ifmedia_printword __P((int));
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#endif
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/*
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* Initialize if_media struct for a specific interface instance.
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*/
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void
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ifmedia_init(ifm, dontcare_mask, change_callback, status_callback)
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struct ifmedia *ifm;
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int dontcare_mask;
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ifm_change_cb_t change_callback;
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ifm_stat_cb_t status_callback;
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{
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TAILQ_INIT(&ifm->ifm_list);
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ifm->ifm_cur = NULL;
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ifm->ifm_media = 0;
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ifm->ifm_mask = dontcare_mask; /* IF don't-care bits */
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ifm->ifm_change = change_callback;
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ifm->ifm_status = status_callback;
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}
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/*
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* Add a media configuration to the list of supported media
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* for a specific interface instance.
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*/
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void
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ifmedia_add(ifm, mword, data, aux)
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struct ifmedia *ifm;
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int mword;
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int data;
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void *aux;
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{
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struct ifmedia_entry *entry;
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#ifdef IFMEDIA_DEBUG
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if (ifmedia_debug) {
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if (ifm == NULL) {
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printf("ifmedia_add: null ifm\n");
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return;
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}
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printf("Adding entry for ");
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ifmedia_printword(mword);
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}
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#endif
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entry = malloc(sizeof(*entry), M_IFADDR, M_NOWAIT);
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if (entry == NULL)
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panic("ifmedia_add: can't malloc entry");
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entry->ifm_media = mword;
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entry->ifm_data = data;
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entry->ifm_aux = aux;
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TAILQ_INSERT_TAIL(&ifm->ifm_list, entry, ifm_list);
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}
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/*
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* Add an array of media configurations to the list of
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* supported media for a specific interface instance.
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*/
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void
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ifmedia_list_add(ifm, lp, count)
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struct ifmedia *ifm;
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struct ifmedia_entry *lp;
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int count;
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{
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int i;
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for (i = 0; i < count; i++)
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ifmedia_add(ifm, lp[i].ifm_media, lp[i].ifm_data,
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lp[i].ifm_aux);
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}
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/*
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* Set the default active media.
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*
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* Called by device-specific code which is assumed to have already
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* selected the default media in hardware. We do _not_ call the
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* media-change callback.
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*/
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void
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ifmedia_set(ifm, target)
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struct ifmedia *ifm;
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int target;
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{
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struct ifmedia_entry *match;
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match = ifmedia_match(ifm, target, ifm->ifm_mask);
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if (match == NULL) {
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printf("ifmedia_set: no match for 0x%x/0x%x\n",
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target, ~ifm->ifm_mask);
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panic("ifmedia_set");
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}
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ifm->ifm_cur = match;
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#ifdef IFMEDIA_DEBUG
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if (ifmedia_debug) {
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printf("ifmedia_set: target ");
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ifmedia_printword(target);
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printf("ifmedia_set: setting to ");
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ifmedia_printword(ifm->ifm_cur->ifm_media);
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}
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#endif
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}
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/*
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* Device-independent media ioctl support function.
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*/
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int
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ifmedia_ioctl(ifp, ifr, ifm, cmd)
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struct ifnet *ifp;
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struct ifreq *ifr;
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struct ifmedia *ifm;
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u_long cmd;
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{
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struct ifmedia_entry *match;
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struct ifmediareq *ifmr = (struct ifmediareq *) ifr;
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int error = 0, sticky;
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if (ifp == NULL || ifr == NULL || ifm == NULL)
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return(EINVAL);
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switch (cmd) {
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/*
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* Set the current media.
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*/
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case SIOCSIFMEDIA:
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{
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struct ifmedia_entry *oldentry;
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int oldmedia;
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int newmedia = ifr->ifr_media;
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match = ifmedia_match(ifm, newmedia, ifm->ifm_mask);
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if (match == NULL) {
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#ifdef IFMEDIA_DEBUG
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if (ifmedia_debug) {
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printf(
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"ifmedia_ioctl: no media found for 0x%x\n",
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newmedia);
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}
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#endif
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return (EINVAL);
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}
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/*
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* If no change, we're done.
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* XXX Automedia may invole software intervention.
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* Keep going in case the connected media changed.
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* Similarly, if best match changed (kernel debugger?).
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*/
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if ((IFM_SUBTYPE(newmedia) != IFM_AUTO) &&
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(newmedia == ifm->ifm_media) &&
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(match == ifm->ifm_cur))
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return 0;
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/*
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* We found a match, now make the driver switch to it.
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* Make sure to preserve our old media type in case the
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* driver can't switch.
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*/
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#ifdef IFMEDIA_DEBUG
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if (ifmedia_debug) {
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printf("ifmedia_ioctl: switching %s to ",
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ifp->if_xname);
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ifmedia_printword(match->ifm_media);
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}
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#endif
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oldentry = ifm->ifm_cur;
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oldmedia = ifm->ifm_media;
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ifm->ifm_cur = match;
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ifm->ifm_media = newmedia;
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error = (*ifm->ifm_change)(ifp);
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if (error) {
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ifm->ifm_cur = oldentry;
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ifm->ifm_media = oldmedia;
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}
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break;
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}
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/*
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* Get list of available media and current media on interface.
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*/
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case SIOCGIFMEDIA:
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{
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struct ifmedia_entry *ep;
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int *kptr, count;
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kptr = NULL; /* XXX gcc */
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ifmr->ifm_active = ifmr->ifm_current = ifm->ifm_cur ?
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ifm->ifm_cur->ifm_media : IFM_NONE;
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ifmr->ifm_mask = ifm->ifm_mask;
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ifmr->ifm_status = 0;
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(*ifm->ifm_status)(ifp, ifmr);
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count = 0;
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ep = TAILQ_FIRST(&ifm->ifm_list);
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if (ifmr->ifm_count != 0) {
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kptr = (int *)malloc(ifmr->ifm_count * sizeof(int),
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M_TEMP, M_WAITOK);
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/*
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* Get the media words from the interface's list.
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*/
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for (; ep != NULL && count < ifmr->ifm_count;
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ep = TAILQ_NEXT(ep, ifm_list), count++)
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kptr[count] = ep->ifm_media;
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if (ep != NULL)
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error = E2BIG; /* oops! */
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}
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/*
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* If there are more interfaces on the list, count
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* them. This allows the caller to set ifmr->ifm_count
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* to 0 on the first call to know how much space to
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* callocate.
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*/
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for (; ep != NULL; ep = TAILQ_NEXT(ep, ifm_list))
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count++;
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/*
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* We do the copyout on E2BIG, because that's
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* just our way of telling userland that there
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* are more. This is the behavior I've observed
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* under BSD/OS 3.0
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*/
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sticky = error;
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if ((error == 0 || error == E2BIG) && ifmr->ifm_count != 0) {
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error = copyout((caddr_t)kptr,
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(caddr_t)ifmr->ifm_ulist,
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ifmr->ifm_count * sizeof(int));
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}
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if (error == 0)
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error = sticky;
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if (ifmr->ifm_count != 0)
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free(kptr, M_TEMP);
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ifmr->ifm_count = count;
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break;
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}
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default:
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return (EINVAL);
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}
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return (error);
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}
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/*
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* Find media entry matching a given ifm word.
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*/
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struct ifmedia_entry *
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ifmedia_match(ifm, target, mask)
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struct ifmedia *ifm;
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int target;
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int mask;
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{
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struct ifmedia_entry *match, *next;
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match = NULL;
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mask = ~mask;
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for (next = TAILQ_FIRST(&ifm->ifm_list); next != NULL;
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next = TAILQ_NEXT(next, ifm_list)) {
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if ((next->ifm_media & mask) == (target & mask)) {
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#if defined(IFMEDIA_DEBUG) || defined(DIAGNOSTIC)
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if (match) {
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printf("ifmedia_match: multiple match for "
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"0x%x/0x%x\n", target, mask);
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}
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#endif
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match = next;
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}
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}
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return match;
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}
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/*
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* Delete all media for a given instance.
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*/
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void
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ifmedia_delete_instance(ifm, inst)
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struct ifmedia *ifm;
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int inst;
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{
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struct ifmedia_entry *ife, *nife;
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for (ife = TAILQ_FIRST(&ifm->ifm_list); ife != NULL;
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ife = nife) {
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nife = TAILQ_NEXT(ife, ifm_list);
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if (inst == IFM_INST_ANY ||
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inst == IFM_INST(ife->ifm_media)) {
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TAILQ_REMOVE(&ifm->ifm_list, ife, ifm_list);
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free(ife, M_DEVBUF);
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}
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}
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}
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/*
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* Compute the interface `baudrate' from the media, for the interface
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* metrics (used by routing daemons).
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*/
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static const struct ifmedia_baudrate ifmedia_baudrate_descriptions[] =
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IFM_BAUDRATE_DESCRIPTIONS;
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int
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ifmedia_baudrate(mword)
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int mword;
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{
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int i;
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for (i = 0; ifmedia_baudrate_descriptions[i].ifmb_word != 0; i++) {
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if ((mword & (IFM_NMASK|IFM_TMASK)) ==
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ifmedia_baudrate_descriptions[i].ifmb_word)
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return (ifmedia_baudrate_descriptions[i].ifmb_baudrate);
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}
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/* Not known. */
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return (0);
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}
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#ifdef IFMEDIA_DEBUG
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static const struct ifmedia_description ifm_type_descriptions[] =
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IFM_TYPE_DESCRIPTIONS;
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static const struct ifmedia_description ifm_subtype_descriptions[] =
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IFM_SUBTYPE_DESCRIPTIONS;
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static const struct ifmedia_description ifm_option_descriptions[] =
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IFM_OPTION_DESCRIPTIONS;
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/*
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* print a media word.
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*/
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static void
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ifmedia_printword(ifmw)
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int ifmw;
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{
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const struct ifmedia_description *desc;
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int seen_option = 0;
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/* Print the top-level interface type. */
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for (desc = ifm_type_descriptions; desc->ifmt_string != NULL;
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desc++) {
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if (IFM_TYPE(ifmw) == desc->ifmt_word)
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break;
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}
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if (desc->ifmt_string == NULL)
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printf("<unknown type> ");
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else
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printf("%s ", desc->ifmt_string);
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/* Print the subtype. */
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for (desc = ifm_subtype_descriptions; desc->ifmt_string != NULL;
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desc++) {
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if (IFM_TYPE_MATCH(desc->ifmt_word, ifmw) &&
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IFM_SUBTYPE(desc->ifmt_word) == IFM_SUBTYPE(ifmw))
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break;
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}
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if (desc->ifmt_string == NULL)
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printf("<unknown subtype>");
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else
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printf("%s", desc->ifmt_string);
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/* Print any options. */
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for (desc = ifm_option_descriptions; desc->ifmt_string != NULL;
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desc++) {
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if (IFM_TYPE_MATCH(desc->ifmt_word, ifmw) &&
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(ifmw & desc->ifmt_word) != 0 &&
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(seen_option & IFM_OPTIONS(desc->ifmt_word)) == 0) {
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if (seen_option == 0)
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printf(" <");
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printf("%s%s", seen_option ? "," : "",
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desc->ifmt_string);
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seen_option |= IFM_OPTIONS(desc->ifmt_word);
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}
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}
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printf("%s\n", seen_option ? ">" : "");
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}
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#endif /* IFMEDIA_DEBUG */
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