sysmon.c

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    1 /*      $NetBSD: sysmon.c,v 1.10 2003/06/29 22:30:50 fvdl Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 2000 Zembu Labs, Inc.
    5  * All rights reserved.
    6  *
    7  * Author: Jason R. Thorpe <thorpej@zembu.com>
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed by Zembu Labs, Inc.
   20  * 4. Neither the name of Zembu Labs nor the names of its employees may
   21  *    be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS
   25  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR-
   26  * RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS-
   27  * CLAIMED.  IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT,
   28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   30  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   33  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   34  */
   35 
   36 /*
   37  * Clearing house for system monitoring hardware.  We currently
   38  * handle environmental sensors, watchdog timers, and power management.
   39  */
   40 
   41 #include <sys/cdefs.h>
   42 __KERNEL_RCSID(0, "$NetBSD: sysmon.c,v 1.10 2003/06/29 22:30:50 fvdl Exp $");
   43 
   44 #include <sys/param.h>
   45 #include <sys/conf.h>
   46 #include <sys/errno.h>
   47 #include <sys/fcntl.h>
   48 #include <sys/lock.h>
   49 #include <sys/callout.h>
   50 #include <sys/kernel.h>
   51 #include <sys/systm.h>
   52 #include <sys/proc.h>
   53 
   54 #include <dev/sysmon/sysmonvar.h>
   55 #include <dev/sysmon/sysmonconf.h>
   56 
   57 dev_type_open(sysmonopen);
   58 dev_type_close(sysmonclose);
   59 dev_type_ioctl(sysmonioctl);
   60 dev_type_read(sysmonread);
   61 dev_type_poll(sysmonpoll);
   62 dev_type_kqfilter(sysmonkqfilter);
   63 
   64 const struct cdevsw sysmon_cdevsw = {
   65         sysmonopen, sysmonclose, sysmonread, nowrite, sysmonioctl,
   66         nostop, notty, sysmonpoll, nommap, sysmonkqfilter,
   67 };
   68 
   69 /*
   70  * sysmonopen:
   71  *
   72  *      Open the system monitor device.
   73  */
   74 int
   75 sysmonopen(dev_t dev, int flag, int mode, struct proc *p)
   76 {
   77         int error;
   78 
   79         switch (minor(dev)) {
   80 #if NSYSMON_ENVSYS > 0
   81         case SYSMON_MINOR_ENVSYS:
   82                 error = sysmonopen_envsys(dev, flag, mode, p);
   83                 break;
   84 #endif
   85 #if NSYSMON_WDOG > 0
   86         case SYSMON_MINOR_WDOG:
   87                 error = sysmonopen_wdog(dev, flag, mode, p);
   88                 break;
   89 #endif
   90 #if NSYSMON_POWER > 0
   91         case SYSMON_MINOR_POWER:
   92                 error = sysmonopen_power(dev, flag, mode, p);
   93                 break;
   94 #endif
   95         default:
   96                 error = ENODEV;
   97         }
   98 
   99         return (error);
  100 }
  101 
  102 /*
  103  * sysmonclose:
  104  *
  105  *      Close the system monitor device.
  106  */
  107 int
  108 sysmonclose(dev_t dev, int flag, int mode, struct proc *p)
  109 {
  110         int error;
  111 
  112         switch (minor(dev)) {
  113 #if NSYSMON_ENVSYS > 0
  114         case SYSMON_MINOR_ENVSYS:
  115                 error = sysmonclose_envsys(dev, flag, mode, p);
  116                 break;
  117 #endif
  118 #if NSYSMON_WDOG > 0
  119         case SYSMON_MINOR_WDOG:
  120                 error = sysmonclose_wdog(dev, flag, mode, p);
  121                 break;
  122 #endif
  123 #if NSYSMON_POWER > 0
  124         case SYSMON_MINOR_POWER:
  125                 error = sysmonclose_power(dev, flag, mode, p);
  126                 break;
  127 #endif
  128         default:
  129                 error = ENODEV;
  130         }
  131 
  132         return (error);
  133 }
  134 
  135 /*
  136  * sysmonioctl:
  137  *
  138  *      Perform a control request.
  139  */
  140 int
  141 sysmonioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
  142 {
  143         int error;
  144 
  145         switch (minor(dev)) {
  146 #if NSYSMON_ENVSYS > 0
  147         case SYSMON_MINOR_ENVSYS:
  148                 error = sysmonioctl_envsys(dev, cmd, data, flag, p);
  149                 break;
  150 #endif
  151 #if NSYSMON_WDOG > 0
  152         case SYSMON_MINOR_WDOG:
  153                 error = sysmonioctl_wdog(dev, cmd, data, flag, p);
  154                 break;
  155 #endif
  156 #if NSYSMON_POWER > 0
  157         case SYSMON_MINOR_POWER:
  158                 error = sysmonioctl_power(dev, cmd, data, flag, p);
  159                 break;
  160 #endif
  161         default:
  162                 error = ENODEV;
  163         }
  164 
  165         return (error);
  166 }
  167 
  168 /*
  169  * sysmonread:
  170  *
  171  *      Perform a read request.
  172  */
  173 int
  174 sysmonread(dev_t dev, struct uio *uio, int flags)
  175 {
  176         int error;
  177 
  178         switch (minor(dev)) {
  179 #if NSYSMON_POWER > 0
  180         case SYSMON_MINOR_POWER:
  181                 error = sysmonread_power(dev, uio, flags);
  182                 break;
  183 #endif
  184         default:
  185                 error = ENODEV;
  186         }
  187 
  188         return (error);
  189 }
  190 
  191 /*
  192  * sysmonpoll:
  193  *
  194  *      Poll the system monitor device.
  195  */
  196 int
  197 sysmonpoll(dev_t dev, int events, struct proc *p)
  198 {
  199         int rv;
  200 
  201         switch (minor(dev)) {
  202 #if NSYSMON_POWER > 0
  203         case SYSMON_MINOR_POWER:
  204                 rv = sysmonpoll_power(dev, events, p);
  205                 break;
  206 #endif
  207         default:
  208                 rv = events;
  209         }
  210 
  211         return (rv);
  212 }
  213 
  214 /*
  215  * sysmonkqfilter:
  216  *
  217  *      Kqueue filter for the system monitor device.
  218  */
  219 int
  220 sysmonkqfilter(dev_t dev, struct knote *kn)
  221 {
  222         int error;
  223 
  224         switch (minor(dev)) {
  225 #if NSYSMON_POWER > 0
  226         case SYSMON_MINOR_POWER:
  227                 error = sysmonkqfilter_power(dev, kn);
  228                 break;
  229 #endif
  230         default:
  231                 error = 1;
  232         }
  233 
  234         return (error);
  235 }

Cache object: 3026725f93b2bc1bd0a1e600fde26f27

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FreeBSD/Linux Kernel Cross Reference sys/dev/sysmon/sysmon.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/sysmon/sysmon.c