sysmon.c revision 1.2.2.2
1 1.2.2.2 bouyer /* $NetBSD: sysmon.c,v 1.2.2.2 2000/07/30 17:54:16 bouyer Exp $ */ 2 1.2.2.2 bouyer 3 1.2.2.2 bouyer /*- 4 1.2.2.2 bouyer * Copyright (c) 2000 Zembu Labs, Inc. 5 1.2.2.2 bouyer * All rights reserved. 6 1.2.2.2 bouyer * 7 1.2.2.2 bouyer * Author: Jason R. Thorpe <thorpej (at) zembu.com> 8 1.2.2.2 bouyer * 9 1.2.2.2 bouyer * Redistribution and use in source and binary forms, with or without 10 1.2.2.2 bouyer * modification, are permitted provided that the following conditions 11 1.2.2.2 bouyer * are met: 12 1.2.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 13 1.2.2.2 bouyer * notice, this list of conditions and the following disclaimer. 14 1.2.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 15 1.2.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 16 1.2.2.2 bouyer * documentation and/or other materials provided with the distribution. 17 1.2.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 18 1.2.2.2 bouyer * must display the following acknowledgement: 19 1.2.2.2 bouyer * This product includes software developed by Zembu Labs, Inc. 20 1.2.2.2 bouyer * 4. Neither the name of Zembu Labs nor the names of its employees may 21 1.2.2.2 bouyer * be used to endorse or promote products derived from this software 22 1.2.2.2 bouyer * without specific prior written permission. 23 1.2.2.2 bouyer * 24 1.2.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS 25 1.2.2.2 bouyer * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR- 26 1.2.2.2 bouyer * RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS- 27 1.2.2.2 bouyer * CLAIMED. IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 1.2.2.2 bouyer * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 1.2.2.2 bouyer * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 1.2.2.2 bouyer * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 1.2.2.2 bouyer * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 1.2.2.2 bouyer * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 1.2.2.2 bouyer * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 1.2.2.2 bouyer */ 35 1.2.2.2 bouyer 36 1.2.2.2 bouyer /* 37 1.2.2.2 bouyer * Clearing house for system monitoring hardware. This pseudo-device 38 1.2.2.2 bouyer * is a place where hardware monitors such as the LM78 and VIA 82C686A 39 1.2.2.2 bouyer * (or even ACPI, eventually) can register themselves to provide 40 1.2.2.2 bouyer * backplane fan and temperature information, etc. 41 1.2.2.2 bouyer * 42 1.2.2.2 bouyer * Eventually, we will also provide a way for a hardware watchdog timer 43 1.2.2.2 bouyer * to hook itself up here (with an option to fall back on a software 44 1.2.2.2 bouyer * watchdog timer if hardware is not available). 45 1.2.2.2 bouyer */ 46 1.2.2.2 bouyer 47 1.2.2.2 bouyer #include <sys/param.h> 48 1.2.2.2 bouyer #include <sys/conf.h> 49 1.2.2.2 bouyer #include <sys/errno.h> 50 1.2.2.2 bouyer #include <sys/fcntl.h> 51 1.2.2.2 bouyer #include <sys/lock.h> 52 1.2.2.2 bouyer 53 1.2.2.2 bouyer #include <dev/sysmon/sysmonvar.h> 54 1.2.2.2 bouyer 55 1.2.2.2 bouyer /* 56 1.2.2.2 bouyer * We run at ENVSYS version 1. 57 1.2.2.2 bouyer */ 58 1.2.2.2 bouyer #define SYSMON_ENVSYS_VERSION (1 * 1000) 59 1.2.2.2 bouyer 60 1.2.2.2 bouyer struct lock sysmon_lock; 61 1.2.2.2 bouyer 62 1.2.2.2 bouyer LIST_HEAD(, sysmon_envsys) sysmon_envsys_list; 63 1.2.2.2 bouyer struct simplelock sysmon_envsys_list_slock = SIMPLELOCK_INITIALIZER; 64 1.2.2.2 bouyer u_int sysmon_envsys_next_sensor_index; 65 1.2.2.2 bouyer 66 1.2.2.2 bouyer int sysmon_initialized; 67 1.2.2.2 bouyer struct simplelock sysmon_initialized_slock = SIMPLELOCK_INITIALIZER; 68 1.2.2.2 bouyer 69 1.2.2.2 bouyer cdev_decl(sysmon); 70 1.2.2.2 bouyer 71 1.2.2.2 bouyer void sysmon_init(void); 72 1.2.2.2 bouyer 73 1.2.2.2 bouyer struct sysmon_envsys *sysmon_envsys_find(u_int); 74 1.2.2.2 bouyer void sysmon_envsys_release(struct sysmon_envsys *); 75 1.2.2.2 bouyer 76 1.2.2.2 bouyer /* 77 1.2.2.2 bouyer * sysmon_init: 78 1.2.2.2 bouyer * 79 1.2.2.2 bouyer * Initialize the system monitor. 80 1.2.2.2 bouyer */ 81 1.2.2.2 bouyer void 82 1.2.2.2 bouyer sysmon_init(void) 83 1.2.2.2 bouyer { 84 1.2.2.2 bouyer 85 1.2.2.2 bouyer lockinit(&sysmon_lock, PWAIT, "sysmon", 0, 0); 86 1.2.2.2 bouyer sysmon_initialized = 1; 87 1.2.2.2 bouyer } 88 1.2.2.2 bouyer 89 1.2.2.2 bouyer /* 90 1.2.2.2 bouyer * sysmonopen: 91 1.2.2.2 bouyer * 92 1.2.2.2 bouyer * Open the system monitor device. 93 1.2.2.2 bouyer */ 94 1.2.2.2 bouyer int 95 1.2.2.2 bouyer sysmonopen(dev_t dev, int flag, int mode, struct proc *p) 96 1.2.2.2 bouyer { 97 1.2.2.2 bouyer int error; 98 1.2.2.2 bouyer 99 1.2.2.2 bouyer simple_lock(&sysmon_initialized_slock); 100 1.2.2.2 bouyer if (sysmon_initialized == 0) 101 1.2.2.2 bouyer sysmon_init(); 102 1.2.2.2 bouyer 103 1.2.2.2 bouyer error = lockmgr(&sysmon_lock, 104 1.2.2.2 bouyer LK_EXCLUSIVE | LK_INTERLOCK | 105 1.2.2.2 bouyer ((flag & O_NONBLOCK) ? LK_NOWAIT : 0), &sysmon_initialized_slock); 106 1.2.2.2 bouyer 107 1.2.2.2 bouyer return (error); 108 1.2.2.2 bouyer } 109 1.2.2.2 bouyer 110 1.2.2.2 bouyer /* 111 1.2.2.2 bouyer * sysmonclose: 112 1.2.2.2 bouyer * 113 1.2.2.2 bouyer * Close the system monitor device. 114 1.2.2.2 bouyer */ 115 1.2.2.2 bouyer int 116 1.2.2.2 bouyer sysmonclose(dev_t dev, int flag, int mode, struct proc *p) 117 1.2.2.2 bouyer { 118 1.2.2.2 bouyer 119 1.2.2.2 bouyer (void) lockmgr(&sysmon_lock, LK_RELEASE, NULL); 120 1.2.2.2 bouyer return (0); 121 1.2.2.2 bouyer } 122 1.2.2.2 bouyer 123 1.2.2.2 bouyer /* 124 1.2.2.2 bouyer * sysmonioctl: 125 1.2.2.2 bouyer * 126 1.2.2.2 bouyer * Perform a control request. 127 1.2.2.2 bouyer */ 128 1.2.2.2 bouyer int 129 1.2.2.2 bouyer sysmonioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 130 1.2.2.2 bouyer { 131 1.2.2.2 bouyer struct sysmon_envsys *sme; 132 1.2.2.2 bouyer int error = 0; 133 1.2.2.2 bouyer u_int oidx; 134 1.2.2.2 bouyer 135 1.2.2.2 bouyer switch (cmd) { 136 1.2.2.2 bouyer /* 137 1.2.2.2 bouyer * For ENVSYS commands, we translate the absolute sensor index 138 1.2.2.2 bouyer * to a device-relative sensor index. 139 1.2.2.2 bouyer */ 140 1.2.2.2 bouyer case ENVSYS_VERSION: 141 1.2.2.2 bouyer *(int32_t *)data = SYSMON_ENVSYS_VERSION; 142 1.2.2.2 bouyer break; 143 1.2.2.2 bouyer 144 1.2.2.2 bouyer case ENVSYS_GRANGE: 145 1.2.2.2 bouyer { 146 1.2.2.2 bouyer struct envsys_range *rng = (void *) data; 147 1.2.2.2 bouyer 148 1.2.2.2 bouyer sme = sysmon_envsys_find(0); /* XXX */ 149 1.2.2.2 bouyer if (sme == NULL) { 150 1.2.2.2 bouyer /* Return empty range for `no sensors'. */ 151 1.2.2.2 bouyer rng->low = 1; 152 1.2.2.2 bouyer rng->high = 0; 153 1.2.2.2 bouyer break; 154 1.2.2.2 bouyer } 155 1.2.2.2 bouyer 156 1.2.2.2 bouyer if (rng->units < ENVSYS_NSENSORS) 157 1.2.2.2 bouyer *rng = sme->sme_ranges[rng->units]; 158 1.2.2.2 bouyer else { 159 1.2.2.2 bouyer /* Return empty range for unsupported sensor types. */ 160 1.2.2.2 bouyer rng->low = 1; 161 1.2.2.2 bouyer rng->high = 0; 162 1.2.2.2 bouyer } 163 1.2.2.2 bouyer sysmon_envsys_release(sme); 164 1.2.2.2 bouyer break; 165 1.2.2.2 bouyer } 166 1.2.2.2 bouyer 167 1.2.2.2 bouyer case ENVSYS_GTREDATA: 168 1.2.2.2 bouyer { 169 1.2.2.2 bouyer struct envsys_tre_data *tred = (void *) data; 170 1.2.2.2 bouyer 171 1.2.2.2 bouyer sme = sysmon_envsys_find(tred->sensor); 172 1.2.2.2 bouyer if (sme == NULL) 173 1.2.2.2 bouyer break; 174 1.2.2.2 bouyer oidx = tred->sensor; 175 1.2.2.2 bouyer tred->sensor = SME_SENSOR_IDX(sme, tred->sensor); 176 1.2.2.2 bouyer if (tred->sensor < sme->sme_nsensors) 177 1.2.2.2 bouyer error = (*sme->sme_gtredata)(sme, tred); 178 1.2.2.2 bouyer else 179 1.2.2.2 bouyer tred->validflags = 0; 180 1.2.2.2 bouyer tred->sensor = oidx; 181 1.2.2.2 bouyer sysmon_envsys_release(sme); 182 1.2.2.2 bouyer break; 183 1.2.2.2 bouyer } 184 1.2.2.2 bouyer 185 1.2.2.2 bouyer case ENVSYS_STREINFO: 186 1.2.2.2 bouyer { 187 1.2.2.2 bouyer struct envsys_basic_info *binfo = (void *) data; 188 1.2.2.2 bouyer 189 1.2.2.2 bouyer sme = sysmon_envsys_find(binfo->sensor); 190 1.2.2.2 bouyer oidx = binfo->sensor; 191 1.2.2.2 bouyer binfo->sensor = SME_SENSOR_IDX(sme, binfo->sensor); 192 1.2.2.2 bouyer if (binfo->sensor < sme->sme_nsensors) 193 1.2.2.2 bouyer error = (*sme->sme_streinfo)(sme, binfo); 194 1.2.2.2 bouyer else 195 1.2.2.2 bouyer binfo->validflags = 0; 196 1.2.2.2 bouyer binfo->sensor = oidx; 197 1.2.2.2 bouyer sysmon_envsys_release(sme); 198 1.2.2.2 bouyer break; 199 1.2.2.2 bouyer } 200 1.2.2.2 bouyer 201 1.2.2.2 bouyer case ENVSYS_GTREINFO: 202 1.2.2.2 bouyer { 203 1.2.2.2 bouyer struct envsys_basic_info *binfo = (void *) data; 204 1.2.2.2 bouyer 205 1.2.2.2 bouyer sme = sysmon_envsys_find(binfo->sensor); 206 1.2.2.2 bouyer oidx = binfo->sensor; 207 1.2.2.2 bouyer binfo->sensor = SME_SENSOR_IDX(sme, binfo->sensor); 208 1.2.2.2 bouyer if (binfo->sensor < sme->sme_nsensors) 209 1.2.2.2 bouyer *binfo = sme->sme_sensor_info[binfo->sensor]; 210 1.2.2.2 bouyer else 211 1.2.2.2 bouyer binfo->validflags = 0; 212 1.2.2.2 bouyer binfo->sensor = oidx; 213 1.2.2.2 bouyer sysmon_envsys_release(sme); 214 1.2.2.2 bouyer break; 215 1.2.2.2 bouyer } 216 1.2.2.2 bouyer 217 1.2.2.2 bouyer default: 218 1.2.2.2 bouyer error = ENOTTY; 219 1.2.2.2 bouyer } 220 1.2.2.2 bouyer 221 1.2.2.2 bouyer return (error); 222 1.2.2.2 bouyer } 223 1.2.2.2 bouyer 224 1.2.2.2 bouyer /* 225 1.2.2.2 bouyer * sysmon_envsys_register: 226 1.2.2.2 bouyer * 227 1.2.2.2 bouyer * Register an ENVSYS device. 228 1.2.2.2 bouyer */ 229 1.2.2.2 bouyer int 230 1.2.2.2 bouyer sysmon_envsys_register(struct sysmon_envsys *sme) 231 1.2.2.2 bouyer { 232 1.2.2.2 bouyer int error = 0; 233 1.2.2.2 bouyer 234 1.2.2.2 bouyer simple_lock(&sysmon_envsys_list_slock); 235 1.2.2.2 bouyer 236 1.2.2.2 bouyer /* XXX Only get to register one, for now. */ 237 1.2.2.2 bouyer if (LIST_FIRST(&sysmon_envsys_list) != NULL) { 238 1.2.2.2 bouyer error = EEXIST; 239 1.2.2.2 bouyer goto out; 240 1.2.2.2 bouyer } 241 1.2.2.2 bouyer 242 1.2.2.2 bouyer if (sme->sme_envsys_version != SYSMON_ENVSYS_VERSION) { 243 1.2.2.2 bouyer error = EINVAL; 244 1.2.2.2 bouyer goto out; 245 1.2.2.2 bouyer } 246 1.2.2.2 bouyer 247 1.2.2.2 bouyer sme->sme_fsensor = sysmon_envsys_next_sensor_index; 248 1.2.2.2 bouyer sysmon_envsys_next_sensor_index += sme->sme_nsensors; 249 1.2.2.2 bouyer LIST_INSERT_HEAD(&sysmon_envsys_list, sme, sme_list); 250 1.2.2.2 bouyer 251 1.2.2.2 bouyer out: 252 1.2.2.2 bouyer simple_unlock(&sysmon_envsys_list_slock); 253 1.2.2.2 bouyer return (error); 254 1.2.2.2 bouyer } 255 1.2.2.2 bouyer 256 1.2.2.2 bouyer /* 257 1.2.2.2 bouyer * sysmon_envsys_unregister: 258 1.2.2.2 bouyer * 259 1.2.2.2 bouyer * Unregister an ENVSYS device. 260 1.2.2.2 bouyer */ 261 1.2.2.2 bouyer void 262 1.2.2.2 bouyer sysmon_envsys_unregister(struct sysmon_envsys *sme) 263 1.2.2.2 bouyer { 264 1.2.2.2 bouyer 265 1.2.2.2 bouyer simple_lock(&sysmon_envsys_list_slock); 266 1.2.2.2 bouyer LIST_REMOVE(sme, sme_list); 267 1.2.2.2 bouyer simple_unlock(&sysmon_envsys_list_slock); 268 1.2.2.2 bouyer } 269 1.2.2.2 bouyer 270 1.2.2.2 bouyer /* 271 1.2.2.2 bouyer * sysmon_envsys_find: 272 1.2.2.2 bouyer * 273 1.2.2.2 bouyer * Find an ENVSYS device. The list remains locked upon 274 1.2.2.2 bouyer * a match. 275 1.2.2.2 bouyer */ 276 1.2.2.2 bouyer struct sysmon_envsys * 277 1.2.2.2 bouyer sysmon_envsys_find(u_int idx) 278 1.2.2.2 bouyer { 279 1.2.2.2 bouyer struct sysmon_envsys *sme; 280 1.2.2.2 bouyer 281 1.2.2.2 bouyer simple_lock(&sysmon_envsys_list_slock); 282 1.2.2.2 bouyer 283 1.2.2.2 bouyer for (sme = LIST_FIRST(&sysmon_envsys_list); sme != NULL; 284 1.2.2.2 bouyer sme = LIST_NEXT(sme, sme_list)) { 285 1.2.2.2 bouyer if (idx >= sme->sme_fsensor && 286 1.2.2.2 bouyer idx < (sme->sme_fsensor + sme->sme_nsensors)) 287 1.2.2.2 bouyer return (sme); 288 1.2.2.2 bouyer } 289 1.2.2.2 bouyer 290 1.2.2.2 bouyer simple_unlock(&sysmon_envsys_list_slock); 291 1.2.2.2 bouyer return (NULL); 292 1.2.2.2 bouyer } 293 1.2.2.2 bouyer 294 1.2.2.2 bouyer /* 295 1.2.2.2 bouyer * sysmon_envsys_release: 296 1.2.2.2 bouyer * 297 1.2.2.2 bouyer * Release an ENVSYS device. 298 1.2.2.2 bouyer */ 299 1.2.2.2 bouyer /* ARGSUSED */ 300 1.2.2.2 bouyer void 301 1.2.2.2 bouyer sysmon_envsys_release(struct sysmon_envsys *sme) 302 1.2.2.2 bouyer { 303 1.2.2.2 bouyer 304 1.2.2.2 bouyer simple_unlock(&sysmon_envsys_list_slock); 305 1.2.2.2 bouyer } 306
Indexes created Fri Sep 26 08:10:20 GMT 2025