1994-05-24 10:09:53 +00:00
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* 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 University of
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* California, Lawrence Berkeley Laboratories.
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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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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* @(#)subr_autoconf.c 8.1 (Berkeley) 6/10/93
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*
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1998-12-04 22:54:57 +00:00
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* $Id: subr_autoconf.c,v 1.6 1997/11/18 12:43:41 bde Exp $
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1994-05-24 10:09:53 +00:00
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*/
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#include <sys/param.h>
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1997-09-21 22:00:25 +00:00
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#include <sys/kernel.h>
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#include <sys/systm.h>
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1994-05-24 10:09:53 +00:00
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#include <sys/device.h>
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1997-11-18 12:43:41 +00:00
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#ifdef UNUSED
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1994-05-24 10:09:53 +00:00
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#include <sys/malloc.h>
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1997-11-18 12:43:41 +00:00
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#endif
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1994-05-24 10:09:53 +00:00
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/*
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* Autoconfiguration subroutines.
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*/
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1997-09-21 22:00:25 +00:00
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#ifdef UNUSED
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1994-05-24 10:09:53 +00:00
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/*
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* ioconf.c exports exactly two names: cfdata and cfroots. All system
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* devices and drivers are found via these tables.
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*/
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extern struct cfdata cfdata[];
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extern short cfroots[];
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#define ROOT ((struct device *)NULL)
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struct matchinfo {
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cfmatch_t fn;
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struct device *parent;
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void *aux;
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struct cfdata *match;
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int pri;
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};
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/*
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* Apply the matching function and choose the best. This is used
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* a few times and we want to keep the code small.
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*/
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static void
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mapply(m, cf)
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register struct matchinfo *m;
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register struct cfdata *cf;
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{
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register int pri;
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if (m->fn != NULL)
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pri = (*m->fn)(m->parent, cf, m->aux);
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else
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pri = (*cf->cf_driver->cd_match)(m->parent, cf, m->aux);
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if (pri > m->pri) {
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m->match = cf;
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m->pri = pri;
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}
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}
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/*
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* Iterate over all potential children of some device, calling the given
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* function (default being the child's match function) for each one.
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* Nonzero returns are matches; the highest value returned is considered
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* the best match. Return the `found child' if we got a match, or NULL
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* otherwise. The `aux' pointer is simply passed on through.
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*
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* Note that this function is designed so that it can be used to apply
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* an arbitrary function to all potential children (its return value
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* can be ignored).
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*/
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struct cfdata *
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config_search(fn, parent, aux)
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cfmatch_t fn;
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register struct device *parent;
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void *aux;
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{
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register struct cfdata *cf;
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register short *p;
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struct matchinfo m;
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m.fn = fn;
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m.parent = parent;
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m.aux = aux;
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m.match = NULL;
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m.pri = 0;
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for (cf = cfdata; cf->cf_driver; cf++) {
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/*
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* Skip cf if no longer eligible, otherwise scan through
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* parents for one matching `parent', and try match function.
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*/
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if (cf->cf_fstate == FSTATE_FOUND)
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continue;
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for (p = cf->cf_parents; *p >= 0; p++)
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if (parent->dv_cfdata == &cfdata[*p])
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mapply(&m, cf);
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}
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return (m.match);
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}
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/*
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* Find the given root device.
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* This is much like config_search, but there is no parent.
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*/
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struct cfdata *
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config_rootsearch(fn, rootname, aux)
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register cfmatch_t fn;
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register char *rootname;
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register void *aux;
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{
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register struct cfdata *cf;
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register short *p;
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struct matchinfo m;
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m.fn = fn;
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m.parent = ROOT;
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m.aux = aux;
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m.match = NULL;
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m.pri = 0;
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/*
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* Look at root entries for matching name. We do not bother
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* with found-state here since only one root should ever be
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* searched (and it must be done first).
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*/
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for (p = cfroots; *p >= 0; p++) {
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cf = &cfdata[*p];
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if (strcmp(cf->cf_driver->cd_name, rootname) == 0)
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mapply(&m, cf);
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}
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return (m.match);
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}
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static char *msgs[3] = { "", " not configured\n", " unsupported\n" };
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/*
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* The given `aux' argument describes a device that has been found
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* on the given parent, but not necessarily configured. Locate the
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* configuration data for that device (using the cd_match configuration
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* driver function) and attach it, and return true. If the device was
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* not configured, call the given `print' function and return 0.
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*/
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int
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config_found(parent, aux, print)
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struct device *parent;
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void *aux;
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cfprint_t print;
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{
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struct cfdata *cf;
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if ((cf = config_search((cfmatch_t)NULL, parent, aux)) != NULL) {
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config_attach(parent, cf, aux, print);
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return (1);
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}
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printf(msgs[(*print)(aux, parent->dv_xname)]);
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return (0);
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}
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/*
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* As above, but for root devices.
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*/
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int
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config_rootfound(rootname, aux)
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char *rootname;
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void *aux;
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{
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struct cfdata *cf;
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if ((cf = config_rootsearch((cfmatch_t)NULL, rootname, aux)) != NULL) {
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config_attach(ROOT, cf, aux, (cfprint_t)NULL);
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return (1);
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}
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printf("root device %s not configured\n", rootname);
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return (0);
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}
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/* just like sprintf(buf, "%d") except that it works from the end */
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static char *
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number(ep, n)
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register char *ep;
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register int n;
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{
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*--ep = 0;
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while (n >= 10) {
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*--ep = (n % 10) + '0';
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n /= 10;
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}
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*--ep = n + '0';
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return (ep);
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}
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/*
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* Attach a found device. Allocates memory for device variables.
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*/
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void
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config_attach(parent, cf, aux, print)
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register struct device *parent;
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register struct cfdata *cf;
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register void *aux;
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cfprint_t print;
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{
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register struct device *dev;
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register struct cfdriver *cd;
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register size_t lname, lunit;
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register char *xunit;
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int myunit;
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char num[10];
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static struct device **nextp = &alldevs;
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cd = cf->cf_driver;
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if (cd->cd_devsize < sizeof(struct device))
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panic("config_attach");
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myunit = cf->cf_unit;
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if (cf->cf_fstate == FSTATE_NOTFOUND)
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cf->cf_fstate = FSTATE_FOUND;
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else
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cf->cf_unit++;
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/* compute length of name and decimal expansion of unit number */
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lname = strlen(cd->cd_name);
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xunit = number(&num[sizeof num], myunit);
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lunit = &num[sizeof num] - xunit;
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if (lname + lunit >= sizeof(dev->dv_xname))
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panic("config_attach: device name too long");
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|
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/* get memory for all device vars */
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dev = (struct device *)malloc(cd->cd_devsize, M_DEVBUF, M_WAITOK);
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|
|
/* XXX cannot wait! */
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|
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bzero(dev, cd->cd_devsize);
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*nextp = dev; /* link up */
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nextp = &dev->dv_next;
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dev->dv_class = cd->cd_class;
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dev->dv_cfdata = cf;
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dev->dv_unit = myunit;
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bcopy(cd->cd_name, dev->dv_xname, lname);
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bcopy(xunit, dev->dv_xname + lname, lunit);
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|
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dev->dv_parent = parent;
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if (parent == ROOT)
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printf("%s (root)", dev->dv_xname);
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else {
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printf("%s at %s", dev->dv_xname, parent->dv_xname);
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(void) (*print)(aux, (char *)0);
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}
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|
|
/* put this device in the devices array */
|
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|
|
if (dev->dv_unit >= cd->cd_ndevs) {
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|
|
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/*
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|
|
|
* Need to expand the array.
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|
*/
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|
|
int old = cd->cd_ndevs, oldbytes, new, newbytes;
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|
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void **nsp;
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if (old == 0) {
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|
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nsp = malloc(MINALLOCSIZE, M_DEVBUF, M_WAITOK); /*XXX*/
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|
|
bzero(nsp, MINALLOCSIZE);
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|
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cd->cd_ndevs = MINALLOCSIZE / sizeof(void *);
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|
|
|
} else {
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|
|
new = cd->cd_ndevs;
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|
|
do {
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|
|
new *= 2;
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|
|
|
} while (new <= dev->dv_unit);
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|
|
cd->cd_ndevs = new;
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|
|
oldbytes = old * sizeof(void *);
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newbytes = new * sizeof(void *);
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|
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nsp = malloc(newbytes, M_DEVBUF, M_WAITOK); /*XXX*/
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|
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bcopy(cd->cd_devs, nsp, oldbytes);
|
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|
|
bzero(&nsp[old], newbytes - oldbytes);
|
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|
|
free(cd->cd_devs, M_DEVBUF);
|
|
|
|
}
|
|
|
|
cd->cd_devs = nsp;
|
|
|
|
}
|
|
|
|
if (cd->cd_devs[dev->dv_unit])
|
|
|
|
panic("config_attach: duplicate %s", dev->dv_xname);
|
|
|
|
cd->cd_devs[dev->dv_unit] = dev;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Before attaching, clobber any unfound devices that are
|
|
|
|
* otherwise identical.
|
|
|
|
*/
|
|
|
|
for (cf = cfdata; cf->cf_driver; cf++)
|
|
|
|
if (cf->cf_driver == cd && cf->cf_unit == dev->dv_unit &&
|
|
|
|
cf->cf_fstate == FSTATE_NOTFOUND)
|
|
|
|
cf->cf_fstate = FSTATE_FOUND;
|
|
|
|
(*cd->cd_attach)(parent, dev, aux);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Attach an event. These must come from initially-zero space (see
|
|
|
|
* commented-out assignments below), but that occurs naturally for
|
|
|
|
* device instance variables.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
evcnt_attach(dev, name, ev)
|
|
|
|
struct device *dev;
|
|
|
|
const char *name;
|
|
|
|
struct evcnt *ev;
|
|
|
|
{
|
|
|
|
static struct evcnt **nextp = &allevents;
|
|
|
|
|
|
|
|
#ifdef DIAGNOSTIC
|
|
|
|
if (strlen(name) >= sizeof(ev->ev_name))
|
|
|
|
panic("evcnt_attach");
|
|
|
|
#endif
|
|
|
|
/* ev->ev_next = NULL; */
|
|
|
|
ev->ev_dev = dev;
|
|
|
|
/* ev->ev_count = 0; */
|
1998-12-04 22:54:57 +00:00
|
|
|
snprintf(ev->ev_name, sizeof(ev->ev_name), "%s", name);
|
1994-05-24 10:09:53 +00:00
|
|
|
*nextp = ev;
|
|
|
|
nextp = &ev->ev_next;
|
|
|
|
}
|
1997-09-21 22:00:25 +00:00
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
* "Interrupt driven config" functions.
|
|
|
|
*/
|
|
|
|
static TAILQ_HEAD(, intr_config_hook) intr_config_hook_list =
|
|
|
|
TAILQ_HEAD_INITIALIZER(intr_config_hook_list);
|
|
|
|
|
|
|
|
|
|
|
|
/* ARGSUSED */
|
|
|
|
static void run_interrupt_driven_config_hooks __P((void *dummy));
|
|
|
|
static void
|
|
|
|
run_interrupt_driven_config_hooks(dummy)
|
|
|
|
void *dummy;
|
|
|
|
{
|
|
|
|
struct intr_config_hook *hook;
|
|
|
|
|
|
|
|
for (hook = intr_config_hook_list.tqh_first; hook != NULL;
|
|
|
|
hook = hook->ich_links.tqe_next) {
|
|
|
|
(*hook->ich_func)(hook->ich_arg);
|
|
|
|
}
|
|
|
|
|
|
|
|
while (intr_config_hook_list.tqh_first != NULL) {
|
|
|
|
tsleep(&intr_config_hook_list, PCONFIG, "conifhk", 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
SYSINIT(intr_config_hooks, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_FIRST,
|
|
|
|
run_interrupt_driven_config_hooks, NULL)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Register a hook that will be called after "cold"
|
|
|
|
* autoconfiguration is complete and interrupts can
|
|
|
|
* be used to complete initialization.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
config_intrhook_establish(hook)
|
|
|
|
struct intr_config_hook *hook;
|
|
|
|
{
|
|
|
|
struct intr_config_hook *hook_entry;
|
|
|
|
|
|
|
|
for (hook_entry = intr_config_hook_list.tqh_first; hook_entry != NULL;
|
|
|
|
hook_entry = hook_entry->ich_links.tqe_next)
|
|
|
|
if (hook_entry == hook)
|
|
|
|
break;
|
|
|
|
if (hook_entry != NULL) {
|
|
|
|
printf("config_intrhook_establish: establishing an "
|
|
|
|
"already established hook.\n");
|
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
TAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links);
|
|
|
|
if (cold == 0)
|
|
|
|
/* XXX Sufficient for LKMs loaded after initial config??? */
|
|
|
|
run_interrupt_driven_config_hooks(NULL);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
config_intrhook_disestablish(hook)
|
|
|
|
struct intr_config_hook *hook;
|
|
|
|
{
|
|
|
|
struct intr_config_hook *hook_entry;
|
|
|
|
|
|
|
|
for (hook_entry = intr_config_hook_list.tqh_first; hook_entry != NULL;
|
|
|
|
hook_entry = hook_entry->ich_links.tqe_next)
|
|
|
|
if (hook_entry == hook)
|
|
|
|
break;
|
|
|
|
if (hook_entry == NULL)
|
|
|
|
panic("config_intrhook_disestablish: disestablishing an "
|
|
|
|
"unestablished hook");
|
|
|
|
|
|
|
|
TAILQ_REMOVE(&intr_config_hook_list, hook, ich_links);
|
|
|
|
/* Wakeup anyone watching the list */
|
|
|
|
wakeup(&intr_config_hook_list);
|
|
|
|
}
|