acpi_cpu_tstate.c revision 1.16.2.2
1 1.16.2.2 yamt /* $NetBSD: acpi_cpu_tstate.c,v 1.16.2.2 2010/10/09 03:32:04 yamt Exp $ */ 2 1.16.2.2 yamt 3 1.16.2.2 yamt /*- 4 1.16.2.2 yamt * Copyright (c) 2010 Jukka Ruohonen <jruohonen (at) iki.fi> 5 1.16.2.2 yamt * All rights reserved. 6 1.16.2.2 yamt * 7 1.16.2.2 yamt * Redistribution and use in source and binary forms, with or without 8 1.16.2.2 yamt * modification, are permitted provided that the following conditions 9 1.16.2.2 yamt * are met: 10 1.16.2.2 yamt * 11 1.16.2.2 yamt * 1. Redistributions of source code must retain the above copyright 12 1.16.2.2 yamt * notice, this list of conditions and the following disclaimer. 13 1.16.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 14 1.16.2.2 yamt * notice, this list of conditions and the following disclaimer in the 15 1.16.2.2 yamt * documentation and/or other materials provided with the distribution. 16 1.16.2.2 yamt * 17 1.16.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 1.16.2.2 yamt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 1.16.2.2 yamt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 1.16.2.2 yamt * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 1.16.2.2 yamt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 1.16.2.2 yamt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 1.16.2.2 yamt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 1.16.2.2 yamt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 1.16.2.2 yamt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 1.16.2.2 yamt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 1.16.2.2 yamt * SUCH DAMAGE. 28 1.16.2.2 yamt */ 29 1.16.2.2 yamt #include <sys/cdefs.h> 30 1.16.2.2 yamt __KERNEL_RCSID(0, "$NetBSD: acpi_cpu_tstate.c,v 1.16.2.2 2010/10/09 03:32:04 yamt Exp $"); 31 1.16.2.2 yamt 32 1.16.2.2 yamt #include <sys/param.h> 33 1.16.2.2 yamt #include <sys/evcnt.h> 34 1.16.2.2 yamt #include <sys/kmem.h> 35 1.16.2.2 yamt 36 1.16.2.2 yamt #include <dev/acpi/acpireg.h> 37 1.16.2.2 yamt #include <dev/acpi/acpivar.h> 38 1.16.2.2 yamt #include <dev/acpi/acpi_cpu.h> 39 1.16.2.2 yamt 40 1.16.2.2 yamt #define _COMPONENT ACPI_BUS_COMPONENT 41 1.16.2.2 yamt ACPI_MODULE_NAME ("acpi_cpu_tstate") 42 1.16.2.2 yamt 43 1.16.2.2 yamt static void acpicpu_tstate_attach_print(struct acpicpu_softc *); 44 1.16.2.2 yamt static void acpicpu_tstate_attach_evcnt(struct acpicpu_softc *); 45 1.16.2.2 yamt static void acpicpu_tstate_detach_evcnt(struct acpicpu_softc *); 46 1.16.2.2 yamt static ACPI_STATUS acpicpu_tstate_tss(struct acpicpu_softc *); 47 1.16.2.2 yamt static ACPI_STATUS acpicpu_tstate_tss_add(struct acpicpu_tstate *, 48 1.16.2.2 yamt ACPI_OBJECT *); 49 1.16.2.2 yamt static ACPI_STATUS acpicpu_tstate_ptc(struct acpicpu_softc *); 50 1.16.2.2 yamt static ACPI_STATUS acpicpu_tstate_fadt(struct acpicpu_softc *); 51 1.16.2.2 yamt static ACPI_STATUS acpicpu_tstate_change(struct acpicpu_softc *); 52 1.16.2.2 yamt static void acpicpu_tstate_reset(struct acpicpu_softc *); 53 1.16.2.2 yamt 54 1.16.2.2 yamt void 55 1.16.2.2 yamt acpicpu_tstate_attach(device_t self) 56 1.16.2.2 yamt { 57 1.16.2.2 yamt struct acpicpu_softc *sc = device_private(self); 58 1.16.2.2 yamt const char *str; 59 1.16.2.2 yamt ACPI_HANDLE tmp; 60 1.16.2.2 yamt ACPI_STATUS rv; 61 1.16.2.2 yamt 62 1.16.2.2 yamt /* 63 1.16.2.2 yamt * Disable T-states for PIIX4. 64 1.16.2.2 yamt */ 65 1.16.2.2 yamt if ((sc->sc_flags & ACPICPU_FLAG_PIIX4) != 0) 66 1.16.2.2 yamt return; 67 1.16.2.2 yamt 68 1.16.2.2 yamt rv = acpicpu_tstate_tss(sc); 69 1.16.2.2 yamt 70 1.16.2.2 yamt if (ACPI_FAILURE(rv)) { 71 1.16.2.2 yamt str = "_TSS"; 72 1.16.2.2 yamt goto out; 73 1.16.2.2 yamt } 74 1.16.2.2 yamt 75 1.16.2.2 yamt rv = acpicpu_tstate_ptc(sc); 76 1.16.2.2 yamt 77 1.16.2.2 yamt if (ACPI_FAILURE(rv)) { 78 1.16.2.2 yamt str = "_PTC"; 79 1.16.2.2 yamt goto out; 80 1.16.2.2 yamt } 81 1.16.2.2 yamt 82 1.16.2.2 yamt /* 83 1.16.2.2 yamt * Comparable to P-states, the _TPC object may 84 1.16.2.2 yamt * be absent in some systems, even though it is 85 1.16.2.2 yamt * required by ACPI 3.0 along with _TSS and _PTC. 86 1.16.2.2 yamt */ 87 1.16.2.2 yamt rv = AcpiGetHandle(sc->sc_node->ad_handle, "_TPC", &tmp); 88 1.16.2.2 yamt 89 1.16.2.2 yamt if (ACPI_FAILURE(rv)) { 90 1.16.2.2 yamt aprint_debug_dev(self, "_TPC missing\n"); 91 1.16.2.2 yamt rv = AE_OK; 92 1.16.2.2 yamt } 93 1.16.2.2 yamt 94 1.16.2.2 yamt out: 95 1.16.2.2 yamt if (ACPI_FAILURE(rv)) { 96 1.16.2.2 yamt 97 1.16.2.2 yamt if (rv != AE_NOT_FOUND) 98 1.16.2.2 yamt aprint_error_dev(sc->sc_dev, "failed to evaluate " 99 1.16.2.2 yamt "%s: %s\n", str, AcpiFormatException(rv)); 100 1.16.2.2 yamt 101 1.16.2.2 yamt rv = acpicpu_tstate_fadt(sc); 102 1.16.2.2 yamt 103 1.16.2.2 yamt if (ACPI_FAILURE(rv)) 104 1.16.2.2 yamt return; 105 1.16.2.2 yamt 106 1.16.2.2 yamt sc->sc_flags |= ACPICPU_FLAG_T_FADT; 107 1.16.2.2 yamt } 108 1.16.2.2 yamt 109 1.16.2.2 yamt sc->sc_flags |= ACPICPU_FLAG_T; 110 1.16.2.2 yamt 111 1.16.2.2 yamt acpicpu_tstate_reset(sc); 112 1.16.2.2 yamt acpicpu_tstate_attach_evcnt(sc); 113 1.16.2.2 yamt acpicpu_tstate_attach_print(sc); 114 1.16.2.2 yamt } 115 1.16.2.2 yamt 116 1.16.2.2 yamt static void 117 1.16.2.2 yamt acpicpu_tstate_attach_print(struct acpicpu_softc *sc) 118 1.16.2.2 yamt { 119 1.16.2.2 yamt const uint8_t method = sc->sc_tstate_control.reg_spaceid; 120 1.16.2.2 yamt struct acpicpu_tstate *ts; 121 1.16.2.2 yamt static bool once = false; 122 1.16.2.2 yamt const char *str; 123 1.16.2.2 yamt uint32_t i; 124 1.16.2.2 yamt 125 1.16.2.2 yamt if (once != false) 126 1.16.2.2 yamt return; 127 1.16.2.2 yamt 128 1.16.2.2 yamt str = (method != ACPI_ADR_SPACE_FIXED_HARDWARE) ? "I/O" : "FFH"; 129 1.16.2.2 yamt 130 1.16.2.2 yamt for (i = 0; i < sc->sc_tstate_count; i++) { 131 1.16.2.2 yamt 132 1.16.2.2 yamt ts = &sc->sc_tstate[i]; 133 1.16.2.2 yamt 134 1.16.2.2 yamt if (ts->ts_percent == 0) 135 1.16.2.2 yamt continue; 136 1.16.2.2 yamt 137 1.16.2.2 yamt aprint_debug_dev(sc->sc_dev, "T%u: %3s, " 138 1.16.2.2 yamt "lat %3u us, pow %5u mW, %3u %%\n", i, str, 139 1.16.2.2 yamt ts->ts_latency, ts->ts_power, ts->ts_percent); 140 1.16.2.2 yamt } 141 1.16.2.2 yamt 142 1.16.2.2 yamt once = true; 143 1.16.2.2 yamt } 144 1.16.2.2 yamt 145 1.16.2.2 yamt static void 146 1.16.2.2 yamt acpicpu_tstate_attach_evcnt(struct acpicpu_softc *sc) 147 1.16.2.2 yamt { 148 1.16.2.2 yamt struct acpicpu_tstate *ts; 149 1.16.2.2 yamt uint32_t i; 150 1.16.2.2 yamt 151 1.16.2.2 yamt for (i = 0; i < sc->sc_tstate_count; i++) { 152 1.16.2.2 yamt 153 1.16.2.2 yamt ts = &sc->sc_tstate[i]; 154 1.16.2.2 yamt 155 1.16.2.2 yamt if (ts->ts_percent == 0) 156 1.16.2.2 yamt continue; 157 1.16.2.2 yamt 158 1.16.2.2 yamt (void)snprintf(ts->ts_name, sizeof(ts->ts_name), 159 1.16.2.2 yamt "T%u (%u %%)", i, ts->ts_percent); 160 1.16.2.2 yamt 161 1.16.2.2 yamt evcnt_attach_dynamic(&ts->ts_evcnt, EVCNT_TYPE_MISC, 162 1.16.2.2 yamt NULL, device_xname(sc->sc_dev), ts->ts_name); 163 1.16.2.2 yamt } 164 1.16.2.2 yamt } 165 1.16.2.2 yamt 166 1.16.2.2 yamt int 167 1.16.2.2 yamt acpicpu_tstate_detach(device_t self) 168 1.16.2.2 yamt { 169 1.16.2.2 yamt struct acpicpu_softc *sc = device_private(self); 170 1.16.2.2 yamt size_t size; 171 1.16.2.2 yamt 172 1.16.2.2 yamt if ((sc->sc_flags & ACPICPU_FLAG_T) == 0) 173 1.16.2.2 yamt return 0; 174 1.16.2.2 yamt 175 1.16.2.2 yamt size = sc->sc_tstate_count * sizeof(*sc->sc_tstate); 176 1.16.2.2 yamt 177 1.16.2.2 yamt if (sc->sc_tstate != NULL) 178 1.16.2.2 yamt kmem_free(sc->sc_tstate, size); 179 1.16.2.2 yamt 180 1.16.2.2 yamt sc->sc_flags &= ~ACPICPU_FLAG_T; 181 1.16.2.2 yamt acpicpu_tstate_detach_evcnt(sc); 182 1.16.2.2 yamt 183 1.16.2.2 yamt return 0; 184 1.16.2.2 yamt } 185 1.16.2.2 yamt 186 1.16.2.2 yamt static void 187 1.16.2.2 yamt acpicpu_tstate_detach_evcnt(struct acpicpu_softc *sc) 188 1.16.2.2 yamt { 189 1.16.2.2 yamt struct acpicpu_tstate *ts; 190 1.16.2.2 yamt uint32_t i; 191 1.16.2.2 yamt 192 1.16.2.2 yamt for (i = 0; i < sc->sc_tstate_count; i++) { 193 1.16.2.2 yamt 194 1.16.2.2 yamt ts = &sc->sc_tstate[i]; 195 1.16.2.2 yamt 196 1.16.2.2 yamt if (ts->ts_percent != 0) 197 1.16.2.2 yamt evcnt_detach(&ts->ts_evcnt); 198 1.16.2.2 yamt } 199 1.16.2.2 yamt } 200 1.16.2.2 yamt 201 1.16.2.2 yamt void 202 1.16.2.2 yamt acpicpu_tstate_start(device_t self) 203 1.16.2.2 yamt { 204 1.16.2.2 yamt /* Nothing. */ 205 1.16.2.2 yamt } 206 1.16.2.2 yamt 207 1.16.2.2 yamt bool 208 1.16.2.2 yamt acpicpu_tstate_suspend(device_t self) 209 1.16.2.2 yamt { 210 1.16.2.2 yamt struct acpicpu_softc *sc = device_private(self); 211 1.16.2.2 yamt 212 1.16.2.2 yamt mutex_enter(&sc->sc_mtx); 213 1.16.2.2 yamt acpicpu_tstate_reset(sc); 214 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 215 1.16.2.2 yamt 216 1.16.2.2 yamt return true; 217 1.16.2.2 yamt } 218 1.16.2.2 yamt 219 1.16.2.2 yamt bool 220 1.16.2.2 yamt acpicpu_tstate_resume(device_t self) 221 1.16.2.2 yamt { 222 1.16.2.2 yamt 223 1.16.2.2 yamt return true; 224 1.16.2.2 yamt } 225 1.16.2.2 yamt 226 1.16.2.2 yamt void 227 1.16.2.2 yamt acpicpu_tstate_callback(void *aux) 228 1.16.2.2 yamt { 229 1.16.2.2 yamt struct acpicpu_softc *sc; 230 1.16.2.2 yamt device_t self = aux; 231 1.16.2.2 yamt uint32_t omax, omin; 232 1.16.2.2 yamt int i; 233 1.16.2.2 yamt 234 1.16.2.2 yamt sc = device_private(self); 235 1.16.2.2 yamt 236 1.16.2.2 yamt if ((sc->sc_flags & ACPICPU_FLAG_T_FADT) != 0) 237 1.16.2.2 yamt return; 238 1.16.2.2 yamt 239 1.16.2.2 yamt mutex_enter(&sc->sc_mtx); 240 1.16.2.2 yamt 241 1.16.2.2 yamt /* 242 1.16.2.2 yamt * If P-states are in use, we should ignore 243 1.16.2.2 yamt * the interrupt unless we are in the highest 244 1.16.2.2 yamt * P-state (see ACPI 4.0, section 8.4.3.3). 245 1.16.2.2 yamt */ 246 1.16.2.2 yamt if ((sc->sc_flags & ACPICPU_FLAG_P) != 0) { 247 1.16.2.2 yamt 248 1.16.2.2 yamt for (i = sc->sc_pstate_count - 1; i >= 0; i--) { 249 1.16.2.2 yamt 250 1.16.2.2 yamt if (sc->sc_pstate[i].ps_freq != 0) 251 1.16.2.2 yamt break; 252 1.16.2.2 yamt } 253 1.16.2.2 yamt 254 1.16.2.2 yamt if (sc->sc_pstate_current != sc->sc_pstate[i].ps_freq) { 255 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 256 1.16.2.2 yamt return; 257 1.16.2.2 yamt } 258 1.16.2.2 yamt } 259 1.16.2.2 yamt 260 1.16.2.2 yamt omax = sc->sc_tstate_max; 261 1.16.2.2 yamt omin = sc->sc_tstate_min; 262 1.16.2.2 yamt 263 1.16.2.2 yamt (void)acpicpu_tstate_change(sc); 264 1.16.2.2 yamt 265 1.16.2.2 yamt if (omax != sc->sc_tstate_max || omin != sc->sc_tstate_min) { 266 1.16.2.2 yamt 267 1.16.2.2 yamt aprint_debug_dev(sc->sc_dev, "throttling window " 268 1.16.2.2 yamt "changed from %u-%u %% to %u-%u %%\n", 269 1.16.2.2 yamt sc->sc_tstate[omax].ts_percent, 270 1.16.2.2 yamt sc->sc_tstate[omin].ts_percent, 271 1.16.2.2 yamt sc->sc_tstate[sc->sc_tstate_max].ts_percent, 272 1.16.2.2 yamt sc->sc_tstate[sc->sc_tstate_min].ts_percent); 273 1.16.2.2 yamt } 274 1.16.2.2 yamt 275 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 276 1.16.2.2 yamt } 277 1.16.2.2 yamt 278 1.16.2.2 yamt static ACPI_STATUS 279 1.16.2.2 yamt acpicpu_tstate_tss(struct acpicpu_softc *sc) 280 1.16.2.2 yamt { 281 1.16.2.2 yamt struct acpicpu_tstate *ts; 282 1.16.2.2 yamt ACPI_OBJECT *obj; 283 1.16.2.2 yamt ACPI_BUFFER buf; 284 1.16.2.2 yamt ACPI_STATUS rv; 285 1.16.2.2 yamt uint32_t count; 286 1.16.2.2 yamt uint32_t i, j; 287 1.16.2.2 yamt 288 1.16.2.2 yamt rv = acpi_eval_struct(sc->sc_node->ad_handle, "_TSS", &buf); 289 1.16.2.2 yamt 290 1.16.2.2 yamt if (ACPI_FAILURE(rv)) 291 1.16.2.2 yamt return rv; 292 1.16.2.2 yamt 293 1.16.2.2 yamt obj = buf.Pointer; 294 1.16.2.2 yamt 295 1.16.2.2 yamt if (obj->Type != ACPI_TYPE_PACKAGE) { 296 1.16.2.2 yamt rv = AE_TYPE; 297 1.16.2.2 yamt goto out; 298 1.16.2.2 yamt } 299 1.16.2.2 yamt 300 1.16.2.2 yamt sc->sc_tstate_count = obj->Package.Count; 301 1.16.2.2 yamt 302 1.16.2.2 yamt if (sc->sc_tstate_count == 0) { 303 1.16.2.2 yamt rv = AE_NOT_EXIST; 304 1.16.2.2 yamt goto out; 305 1.16.2.2 yamt } 306 1.16.2.2 yamt 307 1.16.2.2 yamt if (sc->sc_tstate_count > ACPICPU_T_STATE_MAX) { 308 1.16.2.2 yamt rv = AE_LIMIT; 309 1.16.2.2 yamt goto out; 310 1.16.2.2 yamt } 311 1.16.2.2 yamt 312 1.16.2.2 yamt sc->sc_tstate = kmem_zalloc(sc->sc_tstate_count * 313 1.16.2.2 yamt sizeof(struct acpicpu_tstate), KM_SLEEP); 314 1.16.2.2 yamt 315 1.16.2.2 yamt if (sc->sc_tstate == NULL) { 316 1.16.2.2 yamt rv = AE_NO_MEMORY; 317 1.16.2.2 yamt goto out; 318 1.16.2.2 yamt } 319 1.16.2.2 yamt 320 1.16.2.2 yamt for (count = i = 0; i < sc->sc_tstate_count; i++) { 321 1.16.2.2 yamt 322 1.16.2.2 yamt ts = &sc->sc_tstate[i]; 323 1.16.2.2 yamt rv = acpicpu_tstate_tss_add(ts, &obj->Package.Elements[i]); 324 1.16.2.2 yamt 325 1.16.2.2 yamt if (ACPI_FAILURE(rv)) { 326 1.16.2.2 yamt ts->ts_percent = 0; 327 1.16.2.2 yamt continue; 328 1.16.2.2 yamt } 329 1.16.2.2 yamt 330 1.16.2.2 yamt for (j = 0; j < i; j++) { 331 1.16.2.2 yamt 332 1.16.2.2 yamt if (ts->ts_percent >= sc->sc_tstate[j].ts_percent) { 333 1.16.2.2 yamt ts->ts_percent = 0; 334 1.16.2.2 yamt break; 335 1.16.2.2 yamt } 336 1.16.2.2 yamt } 337 1.16.2.2 yamt 338 1.16.2.2 yamt if (ts->ts_percent != 0) 339 1.16.2.2 yamt count++; 340 1.16.2.2 yamt } 341 1.16.2.2 yamt 342 1.16.2.2 yamt if (count == 0) { 343 1.16.2.2 yamt rv = AE_NOT_EXIST; 344 1.16.2.2 yamt goto out; 345 1.16.2.2 yamt } 346 1.16.2.2 yamt 347 1.16.2.2 yamt /* 348 1.16.2.2 yamt * There must be an entry with the percent 349 1.16.2.2 yamt * field of 100. If this is not true, and if 350 1.16.2.2 yamt * this entry is not in the expected index, 351 1.16.2.2 yamt * invalidate the use of T-states via _TSS. 352 1.16.2.2 yamt */ 353 1.16.2.2 yamt if (sc->sc_tstate[0].ts_percent != 100) { 354 1.16.2.2 yamt rv = AE_BAD_DECIMAL_CONSTANT; 355 1.16.2.2 yamt goto out; 356 1.16.2.2 yamt } 357 1.16.2.2 yamt 358 1.16.2.2 yamt /* 359 1.16.2.2 yamt * The first entry with 100 % duty cycle 360 1.16.2.2 yamt * should have zero in the control field. 361 1.16.2.2 yamt */ 362 1.16.2.2 yamt if (sc->sc_tstate[0].ts_control != 0) { 363 1.16.2.2 yamt rv = AE_AML_BAD_RESOURCE_VALUE; 364 1.16.2.2 yamt goto out; 365 1.16.2.2 yamt } 366 1.16.2.2 yamt 367 1.16.2.2 yamt out: 368 1.16.2.2 yamt if (buf.Pointer != NULL) 369 1.16.2.2 yamt ACPI_FREE(buf.Pointer); 370 1.16.2.2 yamt 371 1.16.2.2 yamt return rv; 372 1.16.2.2 yamt } 373 1.16.2.2 yamt 374 1.16.2.2 yamt static ACPI_STATUS 375 1.16.2.2 yamt acpicpu_tstate_tss_add(struct acpicpu_tstate *ts, ACPI_OBJECT *obj) 376 1.16.2.2 yamt { 377 1.16.2.2 yamt ACPI_OBJECT *elm; 378 1.16.2.2 yamt uint32_t val[5]; 379 1.16.2.2 yamt uint32_t *p; 380 1.16.2.2 yamt int i; 381 1.16.2.2 yamt 382 1.16.2.2 yamt if (obj->Type != ACPI_TYPE_PACKAGE) 383 1.16.2.2 yamt return AE_TYPE; 384 1.16.2.2 yamt 385 1.16.2.2 yamt if (obj->Package.Count != 5) 386 1.16.2.2 yamt return AE_BAD_DATA; 387 1.16.2.2 yamt 388 1.16.2.2 yamt elm = obj->Package.Elements; 389 1.16.2.2 yamt 390 1.16.2.2 yamt for (i = 0; i < 5; i++) { 391 1.16.2.2 yamt 392 1.16.2.2 yamt if (elm[i].Type != ACPI_TYPE_INTEGER) 393 1.16.2.2 yamt return AE_TYPE; 394 1.16.2.2 yamt 395 1.16.2.2 yamt if (elm[i].Integer.Value > UINT32_MAX) 396 1.16.2.2 yamt return AE_AML_NUMERIC_OVERFLOW; 397 1.16.2.2 yamt 398 1.16.2.2 yamt val[i] = elm[i].Integer.Value; 399 1.16.2.2 yamt } 400 1.16.2.2 yamt 401 1.16.2.2 yamt p = &ts->ts_percent; 402 1.16.2.2 yamt 403 1.16.2.2 yamt for (i = 0; i < 5; i++, p++) 404 1.16.2.2 yamt *p = val[i]; 405 1.16.2.2 yamt 406 1.16.2.2 yamt /* 407 1.16.2.2 yamt * The minimum should be around 100 / 8 = 12.5 %. 408 1.16.2.2 yamt */ 409 1.16.2.2 yamt if (ts->ts_percent < 10 || ts->ts_percent > 100) 410 1.16.2.2 yamt return AE_BAD_DECIMAL_CONSTANT; 411 1.16.2.2 yamt 412 1.16.2.2 yamt if (ts->ts_latency < 1) 413 1.16.2.2 yamt ts->ts_latency = 1; 414 1.16.2.2 yamt 415 1.16.2.2 yamt return AE_OK; 416 1.16.2.2 yamt } 417 1.16.2.2 yamt 418 1.16.2.2 yamt ACPI_STATUS 419 1.16.2.2 yamt acpicpu_tstate_ptc(struct acpicpu_softc *sc) 420 1.16.2.2 yamt { 421 1.16.2.2 yamt static const size_t size = sizeof(struct acpicpu_reg); 422 1.16.2.2 yamt struct acpicpu_reg *reg[2]; 423 1.16.2.2 yamt ACPI_OBJECT *elm, *obj; 424 1.16.2.2 yamt ACPI_BUFFER buf; 425 1.16.2.2 yamt ACPI_STATUS rv; 426 1.16.2.2 yamt int i; 427 1.16.2.2 yamt 428 1.16.2.2 yamt rv = acpi_eval_struct(sc->sc_node->ad_handle, "_PTC", &buf); 429 1.16.2.2 yamt 430 1.16.2.2 yamt if (ACPI_FAILURE(rv)) 431 1.16.2.2 yamt return rv; 432 1.16.2.2 yamt 433 1.16.2.2 yamt obj = buf.Pointer; 434 1.16.2.2 yamt 435 1.16.2.2 yamt if (obj->Type != ACPI_TYPE_PACKAGE) { 436 1.16.2.2 yamt rv = AE_TYPE; 437 1.16.2.2 yamt goto out; 438 1.16.2.2 yamt } 439 1.16.2.2 yamt 440 1.16.2.2 yamt if (obj->Package.Count != 2) { 441 1.16.2.2 yamt rv = AE_LIMIT; 442 1.16.2.2 yamt goto out; 443 1.16.2.2 yamt } 444 1.16.2.2 yamt 445 1.16.2.2 yamt for (i = 0; i < 2; i++) { 446 1.16.2.2 yamt 447 1.16.2.2 yamt elm = &obj->Package.Elements[i]; 448 1.16.2.2 yamt 449 1.16.2.2 yamt if (elm->Type != ACPI_TYPE_BUFFER) { 450 1.16.2.2 yamt rv = AE_TYPE; 451 1.16.2.2 yamt goto out; 452 1.16.2.2 yamt } 453 1.16.2.2 yamt 454 1.16.2.2 yamt if (size > elm->Buffer.Length) { 455 1.16.2.2 yamt rv = AE_AML_BAD_RESOURCE_LENGTH; 456 1.16.2.2 yamt goto out; 457 1.16.2.2 yamt } 458 1.16.2.2 yamt 459 1.16.2.2 yamt reg[i] = (struct acpicpu_reg *)elm->Buffer.Pointer; 460 1.16.2.2 yamt 461 1.16.2.2 yamt switch (reg[i]->reg_spaceid) { 462 1.16.2.2 yamt 463 1.16.2.2 yamt case ACPI_ADR_SPACE_SYSTEM_IO: 464 1.16.2.2 yamt 465 1.16.2.2 yamt if (reg[i]->reg_addr == 0) { 466 1.16.2.2 yamt rv = AE_AML_ILLEGAL_ADDRESS; 467 1.16.2.2 yamt goto out; 468 1.16.2.2 yamt } 469 1.16.2.2 yamt 470 1.16.2.2 yamt /* 471 1.16.2.2 yamt * Check that the values match the IA32 clock 472 1.16.2.2 yamt * modulation MSR, where the bit 0 is reserved, 473 1.16.2.2 yamt * bits 1 through 3 define the duty cycle, and 474 1.16.2.2 yamt * the fourth bit enables the modulation. 475 1.16.2.2 yamt */ 476 1.16.2.2 yamt if (reg[i]->reg_bitwidth != 4) { 477 1.16.2.2 yamt rv = AE_AML_BAD_RESOURCE_VALUE; 478 1.16.2.2 yamt goto out; 479 1.16.2.2 yamt } 480 1.16.2.2 yamt 481 1.16.2.2 yamt if (reg[i]->reg_bitoffset != 1) { 482 1.16.2.2 yamt rv = AE_AML_BAD_RESOURCE_VALUE; 483 1.16.2.2 yamt goto out; 484 1.16.2.2 yamt } 485 1.16.2.2 yamt 486 1.16.2.2 yamt break; 487 1.16.2.2 yamt 488 1.16.2.2 yamt case ACPI_ADR_SPACE_FIXED_HARDWARE: 489 1.16.2.2 yamt 490 1.16.2.2 yamt if ((sc->sc_flags & ACPICPU_FLAG_T_FFH) == 0) { 491 1.16.2.2 yamt rv = AE_SUPPORT; 492 1.16.2.2 yamt goto out; 493 1.16.2.2 yamt } 494 1.16.2.2 yamt 495 1.16.2.2 yamt break; 496 1.16.2.2 yamt 497 1.16.2.2 yamt default: 498 1.16.2.2 yamt rv = AE_AML_INVALID_SPACE_ID; 499 1.16.2.2 yamt goto out; 500 1.16.2.2 yamt } 501 1.16.2.2 yamt } 502 1.16.2.2 yamt 503 1.16.2.2 yamt if (reg[0]->reg_spaceid != reg[1]->reg_spaceid) { 504 1.16.2.2 yamt rv = AE_AML_INVALID_SPACE_ID; 505 1.16.2.2 yamt goto out; 506 1.16.2.2 yamt } 507 1.16.2.2 yamt 508 1.16.2.2 yamt (void)memcpy(&sc->sc_tstate_control, reg[0], size); 509 1.16.2.2 yamt (void)memcpy(&sc->sc_tstate_status, reg[1], size); 510 1.16.2.2 yamt 511 1.16.2.2 yamt out: 512 1.16.2.2 yamt if (buf.Pointer != NULL) 513 1.16.2.2 yamt ACPI_FREE(buf.Pointer); 514 1.16.2.2 yamt 515 1.16.2.2 yamt return rv; 516 1.16.2.2 yamt } 517 1.16.2.2 yamt 518 1.16.2.2 yamt static ACPI_STATUS 519 1.16.2.2 yamt acpicpu_tstate_fadt(struct acpicpu_softc *sc) 520 1.16.2.2 yamt { 521 1.16.2.2 yamt static const size_t size = sizeof(struct acpicpu_tstate); 522 1.16.2.2 yamt const uint8_t offset = AcpiGbl_FADT.DutyOffset; 523 1.16.2.2 yamt const uint8_t width = AcpiGbl_FADT.DutyWidth; 524 1.16.2.2 yamt uint8_t beta, count, i; 525 1.16.2.2 yamt 526 1.16.2.2 yamt if (sc->sc_object.ao_pblkaddr == 0) 527 1.16.2.2 yamt return AE_AML_ILLEGAL_ADDRESS; 528 1.16.2.2 yamt 529 1.16.2.2 yamt /* 530 1.16.2.2 yamt * A zero DUTY_WIDTH is used announce that 531 1.16.2.2 yamt * T-states are not available via FADT. 532 1.16.2.2 yamt */ 533 1.16.2.2 yamt if (width == 0 || width + offset > 4) 534 1.16.2.2 yamt return AE_AML_BAD_RESOURCE_VALUE; 535 1.16.2.2 yamt 536 1.16.2.2 yamt count = 1 << width; 537 1.16.2.2 yamt 538 1.16.2.2 yamt if (count > ACPICPU_T_STATE_MAX) 539 1.16.2.2 yamt return AE_LIMIT; 540 1.16.2.2 yamt 541 1.16.2.2 yamt if (sc->sc_tstate != NULL) 542 1.16.2.2 yamt kmem_free(sc->sc_tstate, sc->sc_tstate_count * size); 543 1.16.2.2 yamt 544 1.16.2.2 yamt sc->sc_tstate = kmem_zalloc(count * size, KM_SLEEP); 545 1.16.2.2 yamt 546 1.16.2.2 yamt if (sc->sc_tstate == NULL) 547 1.16.2.2 yamt return ENOMEM; 548 1.16.2.2 yamt 549 1.16.2.2 yamt sc->sc_tstate_count = count; 550 1.16.2.2 yamt 551 1.16.2.2 yamt /* 552 1.16.2.2 yamt * Approximate duty cycles and set the MSR values. 553 1.16.2.2 yamt */ 554 1.16.2.2 yamt for (beta = 100 / count, i = 0; i < count; i++) { 555 1.16.2.2 yamt sc->sc_tstate[i].ts_percent = 100 - beta * i; 556 1.16.2.2 yamt sc->sc_tstate[i].ts_latency = 1; 557 1.16.2.2 yamt } 558 1.16.2.2 yamt 559 1.16.2.2 yamt for (i = 1; i < count; i++) 560 1.16.2.2 yamt sc->sc_tstate[i].ts_control = (count - i) | __BIT(3); 561 1.16.2.2 yamt 562 1.16.2.2 yamt /* 563 1.16.2.2 yamt * Fake values for throttling registers. 564 1.16.2.2 yamt */ 565 1.16.2.2 yamt (void)memset(&sc->sc_tstate_status, 0, sizeof(struct acpicpu_reg)); 566 1.16.2.2 yamt (void)memset(&sc->sc_tstate_control, 0, sizeof(struct acpicpu_reg)); 567 1.16.2.2 yamt 568 1.16.2.2 yamt sc->sc_tstate_status.reg_bitwidth = width; 569 1.16.2.2 yamt sc->sc_tstate_status.reg_bitoffset = offset; 570 1.16.2.2 yamt sc->sc_tstate_status.reg_addr = sc->sc_object.ao_pblkaddr; 571 1.16.2.2 yamt sc->sc_tstate_status.reg_spaceid = ACPI_ADR_SPACE_SYSTEM_IO; 572 1.16.2.2 yamt 573 1.16.2.2 yamt sc->sc_tstate_control.reg_bitwidth = width; 574 1.16.2.2 yamt sc->sc_tstate_control.reg_bitoffset = offset; 575 1.16.2.2 yamt sc->sc_tstate_control.reg_addr = sc->sc_object.ao_pblkaddr; 576 1.16.2.2 yamt sc->sc_tstate_control.reg_spaceid = ACPI_ADR_SPACE_SYSTEM_IO; 577 1.16.2.2 yamt 578 1.16.2.2 yamt return AE_OK; 579 1.16.2.2 yamt } 580 1.16.2.2 yamt 581 1.16.2.2 yamt static ACPI_STATUS 582 1.16.2.2 yamt acpicpu_tstate_change(struct acpicpu_softc *sc) 583 1.16.2.2 yamt { 584 1.16.2.2 yamt ACPI_INTEGER val; 585 1.16.2.2 yamt ACPI_STATUS rv; 586 1.16.2.2 yamt 587 1.16.2.2 yamt acpicpu_tstate_reset(sc); 588 1.16.2.2 yamt 589 1.16.2.2 yamt /* 590 1.16.2.2 yamt * Evaluate the available T-state window: 591 1.16.2.2 yamt * 592 1.16.2.2 yamt * _TPC : either this maximum or any lower power 593 1.16.2.2 yamt * (i.e. higher numbered) state may be used. 594 1.16.2.2 yamt * 595 1.16.2.2 yamt * _TDL : either this minimum or any higher power 596 1.16.2.2 yamt * (i.e. lower numbered) state may be used. 597 1.16.2.2 yamt * 598 1.16.2.2 yamt * _TDL >= _TPC || _TDL >= _TSS[last entry]. 599 1.16.2.2 yamt */ 600 1.16.2.2 yamt rv = acpi_eval_integer(sc->sc_node->ad_handle, "_TPC", &val); 601 1.16.2.2 yamt 602 1.16.2.2 yamt if (ACPI_SUCCESS(rv) && val < sc->sc_tstate_count) { 603 1.16.2.2 yamt 604 1.16.2.2 yamt if (sc->sc_tstate[val].ts_percent != 0) 605 1.16.2.2 yamt sc->sc_tstate_max = val; 606 1.16.2.2 yamt } 607 1.16.2.2 yamt 608 1.16.2.2 yamt if (sc->sc_passive != true) 609 1.16.2.2 yamt return AE_OK; 610 1.16.2.2 yamt 611 1.16.2.2 yamt rv = acpi_eval_integer(sc->sc_node->ad_handle, "_TDL", &val); 612 1.16.2.2 yamt 613 1.16.2.2 yamt if (ACPI_SUCCESS(rv) && val < sc->sc_tstate_count) { 614 1.16.2.2 yamt 615 1.16.2.2 yamt if (val >= sc->sc_tstate_max && 616 1.16.2.2 yamt sc->sc_tstate[val].ts_percent != 0) 617 1.16.2.2 yamt sc->sc_tstate_min = val; 618 1.16.2.2 yamt } 619 1.16.2.2 yamt 620 1.16.2.2 yamt return AE_OK; 621 1.16.2.2 yamt } 622 1.16.2.2 yamt 623 1.16.2.2 yamt static void 624 1.16.2.2 yamt acpicpu_tstate_reset(struct acpicpu_softc *sc) 625 1.16.2.2 yamt { 626 1.16.2.2 yamt 627 1.16.2.2 yamt sc->sc_tstate_max = 0; 628 1.16.2.2 yamt sc->sc_tstate_min = sc->sc_tstate_count - 1; 629 1.16.2.2 yamt } 630 1.16.2.2 yamt 631 1.16.2.2 yamt int 632 1.16.2.2 yamt acpicpu_tstate_get(struct acpicpu_softc *sc, uint32_t *percent) 633 1.16.2.2 yamt { 634 1.16.2.2 yamt const uint8_t method = sc->sc_tstate_control.reg_spaceid; 635 1.16.2.2 yamt struct acpicpu_tstate *ts = NULL; 636 1.16.2.2 yamt uint32_t i, val = 0; 637 1.16.2.2 yamt uint8_t offset; 638 1.16.2.2 yamt uint64_t addr; 639 1.16.2.2 yamt int rv; 640 1.16.2.2 yamt 641 1.16.2.2 yamt if (sc->sc_cold != false) { 642 1.16.2.2 yamt rv = EBUSY; 643 1.16.2.2 yamt goto fail; 644 1.16.2.2 yamt } 645 1.16.2.2 yamt 646 1.16.2.2 yamt if ((sc->sc_flags & ACPICPU_FLAG_T) == 0) { 647 1.16.2.2 yamt rv = ENODEV; 648 1.16.2.2 yamt goto fail; 649 1.16.2.2 yamt } 650 1.16.2.2 yamt 651 1.16.2.2 yamt mutex_enter(&sc->sc_mtx); 652 1.16.2.2 yamt 653 1.16.2.2 yamt if (sc->sc_tstate_current != ACPICPU_T_STATE_UNKNOWN) { 654 1.16.2.2 yamt *percent = sc->sc_tstate_current; 655 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 656 1.16.2.2 yamt return 0; 657 1.16.2.2 yamt } 658 1.16.2.2 yamt 659 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 660 1.16.2.2 yamt 661 1.16.2.2 yamt switch (method) { 662 1.16.2.2 yamt 663 1.16.2.2 yamt case ACPI_ADR_SPACE_FIXED_HARDWARE: 664 1.16.2.2 yamt 665 1.16.2.2 yamt rv = acpicpu_md_tstate_get(sc, percent); 666 1.16.2.2 yamt 667 1.16.2.2 yamt if (rv != 0) 668 1.16.2.2 yamt goto fail; 669 1.16.2.2 yamt 670 1.16.2.2 yamt break; 671 1.16.2.2 yamt 672 1.16.2.2 yamt case ACPI_ADR_SPACE_SYSTEM_IO: 673 1.16.2.2 yamt 674 1.16.2.2 yamt addr = sc->sc_tstate_status.reg_addr; 675 1.16.2.2 yamt offset = sc->sc_tstate_status.reg_bitoffset; 676 1.16.2.2 yamt 677 1.16.2.2 yamt (void)AcpiOsReadPort(addr, &val, 8); 678 1.16.2.2 yamt 679 1.16.2.2 yamt val = (val >> offset) & 0x0F; 680 1.16.2.2 yamt 681 1.16.2.2 yamt for (i = 0; i < sc->sc_tstate_count; i++) { 682 1.16.2.2 yamt 683 1.16.2.2 yamt if (sc->sc_tstate[i].ts_percent == 0) 684 1.16.2.2 yamt continue; 685 1.16.2.2 yamt 686 1.16.2.2 yamt if (val == sc->sc_tstate[i].ts_status) { 687 1.16.2.2 yamt ts = &sc->sc_tstate[i]; 688 1.16.2.2 yamt break; 689 1.16.2.2 yamt } 690 1.16.2.2 yamt } 691 1.16.2.2 yamt 692 1.16.2.2 yamt if (__predict_false(ts == NULL)) { 693 1.16.2.2 yamt rv = EIO; 694 1.16.2.2 yamt goto fail; 695 1.16.2.2 yamt } 696 1.16.2.2 yamt 697 1.16.2.2 yamt *percent = ts->ts_percent; 698 1.16.2.2 yamt break; 699 1.16.2.2 yamt 700 1.16.2.2 yamt default: 701 1.16.2.2 yamt rv = ENOTTY; 702 1.16.2.2 yamt goto fail; 703 1.16.2.2 yamt } 704 1.16.2.2 yamt 705 1.16.2.2 yamt mutex_enter(&sc->sc_mtx); 706 1.16.2.2 yamt sc->sc_tstate_current = *percent; 707 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 708 1.16.2.2 yamt 709 1.16.2.2 yamt return 0; 710 1.16.2.2 yamt 711 1.16.2.2 yamt fail: 712 1.16.2.2 yamt aprint_error_dev(sc->sc_dev, "failed " 713 1.16.2.2 yamt "to get T-state (err %d)\n", rv); 714 1.16.2.2 yamt 715 1.16.2.2 yamt mutex_enter(&sc->sc_mtx); 716 1.16.2.2 yamt *percent = sc->sc_tstate_current = ACPICPU_T_STATE_UNKNOWN; 717 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 718 1.16.2.2 yamt 719 1.16.2.2 yamt return rv; 720 1.16.2.2 yamt } 721 1.16.2.2 yamt 722 1.16.2.2 yamt int 723 1.16.2.2 yamt acpicpu_tstate_set(struct acpicpu_softc *sc, uint32_t percent) 724 1.16.2.2 yamt { 725 1.16.2.2 yamt const uint8_t method = sc->sc_tstate_control.reg_spaceid; 726 1.16.2.2 yamt struct acpicpu_tstate *ts = NULL; 727 1.16.2.2 yamt uint32_t i, val; 728 1.16.2.2 yamt uint8_t offset; 729 1.16.2.2 yamt uint64_t addr; 730 1.16.2.2 yamt int rv; 731 1.16.2.2 yamt 732 1.16.2.2 yamt if (sc->sc_cold != false) { 733 1.16.2.2 yamt rv = EBUSY; 734 1.16.2.2 yamt goto fail; 735 1.16.2.2 yamt } 736 1.16.2.2 yamt 737 1.16.2.2 yamt if ((sc->sc_flags & ACPICPU_FLAG_T) == 0) { 738 1.16.2.2 yamt rv = ENODEV; 739 1.16.2.2 yamt goto fail; 740 1.16.2.2 yamt } 741 1.16.2.2 yamt 742 1.16.2.2 yamt mutex_enter(&sc->sc_mtx); 743 1.16.2.2 yamt 744 1.16.2.2 yamt if (sc->sc_tstate_current == percent) { 745 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 746 1.16.2.2 yamt return 0; 747 1.16.2.2 yamt } 748 1.16.2.2 yamt 749 1.16.2.2 yamt for (i = sc->sc_tstate_max; i <= sc->sc_tstate_min; i++) { 750 1.16.2.2 yamt 751 1.16.2.2 yamt if (sc->sc_tstate[i].ts_percent == 0) 752 1.16.2.2 yamt continue; 753 1.16.2.2 yamt 754 1.16.2.2 yamt if (sc->sc_tstate[i].ts_percent == percent) { 755 1.16.2.2 yamt ts = &sc->sc_tstate[i]; 756 1.16.2.2 yamt break; 757 1.16.2.2 yamt } 758 1.16.2.2 yamt } 759 1.16.2.2 yamt 760 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 761 1.16.2.2 yamt 762 1.16.2.2 yamt if (__predict_false(ts == NULL)) { 763 1.16.2.2 yamt rv = EINVAL; 764 1.16.2.2 yamt goto fail; 765 1.16.2.2 yamt } 766 1.16.2.2 yamt 767 1.16.2.2 yamt switch (method) { 768 1.16.2.2 yamt 769 1.16.2.2 yamt case ACPI_ADR_SPACE_FIXED_HARDWARE: 770 1.16.2.2 yamt 771 1.16.2.2 yamt rv = acpicpu_md_tstate_set(ts); 772 1.16.2.2 yamt 773 1.16.2.2 yamt if (rv != 0) 774 1.16.2.2 yamt goto fail; 775 1.16.2.2 yamt 776 1.16.2.2 yamt break; 777 1.16.2.2 yamt 778 1.16.2.2 yamt case ACPI_ADR_SPACE_SYSTEM_IO: 779 1.16.2.2 yamt 780 1.16.2.2 yamt addr = sc->sc_tstate_control.reg_addr; 781 1.16.2.2 yamt offset = sc->sc_tstate_control.reg_bitoffset; 782 1.16.2.2 yamt 783 1.16.2.2 yamt val = (ts->ts_control & 0x0F) << offset; 784 1.16.2.2 yamt 785 1.16.2.2 yamt if (ts->ts_percent != 100 && (val & __BIT(4)) == 0) { 786 1.16.2.2 yamt rv = EINVAL; 787 1.16.2.2 yamt goto fail; 788 1.16.2.2 yamt } 789 1.16.2.2 yamt 790 1.16.2.2 yamt (void)AcpiOsWritePort(addr, val, 8); 791 1.16.2.2 yamt 792 1.16.2.2 yamt /* 793 1.16.2.2 yamt * If the status field is zero, the transition is 794 1.16.2.2 yamt * specified to be "asynchronous" and there is no 795 1.16.2.2 yamt * need to check the status (ACPI 4.0, 8.4.3.2). 796 1.16.2.2 yamt */ 797 1.16.2.2 yamt if (ts->ts_status == 0) 798 1.16.2.2 yamt break; 799 1.16.2.2 yamt 800 1.16.2.2 yamt addr = sc->sc_tstate_status.reg_addr; 801 1.16.2.2 yamt offset = sc->sc_tstate_status.reg_bitoffset; 802 1.16.2.2 yamt 803 1.16.2.2 yamt for (i = val = 0; i < ACPICPU_T_STATE_RETRY; i++) { 804 1.16.2.2 yamt 805 1.16.2.2 yamt (void)AcpiOsReadPort(addr, &val, 8); 806 1.16.2.2 yamt 807 1.16.2.2 yamt val = (val >> offset) & 0x0F; 808 1.16.2.2 yamt 809 1.16.2.2 yamt if (val == ts->ts_status) 810 1.16.2.2 yamt break; 811 1.16.2.2 yamt 812 1.16.2.2 yamt DELAY(ts->ts_latency); 813 1.16.2.2 yamt } 814 1.16.2.2 yamt 815 1.16.2.2 yamt if (i == ACPICPU_T_STATE_RETRY) { 816 1.16.2.2 yamt rv = EAGAIN; 817 1.16.2.2 yamt goto fail; 818 1.16.2.2 yamt } 819 1.16.2.2 yamt 820 1.16.2.2 yamt break; 821 1.16.2.2 yamt 822 1.16.2.2 yamt default: 823 1.16.2.2 yamt rv = ENOTTY; 824 1.16.2.2 yamt goto fail; 825 1.16.2.2 yamt } 826 1.16.2.2 yamt 827 1.16.2.2 yamt mutex_enter(&sc->sc_mtx); 828 1.16.2.2 yamt ts->ts_evcnt.ev_count++; 829 1.16.2.2 yamt sc->sc_tstate_current = percent; 830 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 831 1.16.2.2 yamt 832 1.16.2.2 yamt return 0; 833 1.16.2.2 yamt 834 1.16.2.2 yamt fail: 835 1.16.2.2 yamt aprint_error_dev(sc->sc_dev, "failed to " 836 1.16.2.2 yamt "throttle to %u %% (err %d)\n", percent, rv); 837 1.16.2.2 yamt 838 1.16.2.2 yamt mutex_enter(&sc->sc_mtx); 839 1.16.2.2 yamt sc->sc_tstate_current = ACPICPU_T_STATE_UNKNOWN; 840 1.16.2.2 yamt mutex_exit(&sc->sc_mtx); 841 1.16.2.2 yamt 842 1.16.2.2 yamt return rv; 843 1.16.2.2 yamt } 844
Indexes created Tue Sep 30 20:09:53 GMT 2025