acpi_cpu.c revision 1.13
1 /* $NetBSD: acpi_cpu.c,v 1.13 2010/08/08 18:47:54 jruoho Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 Jukka Ruohonen <jruohonen (at) iki.fi> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: acpi_cpu.c,v 1.13 2010/08/08 18:47:54 jruoho Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/cpu.h> 34 #include <sys/kernel.h> 35 #include <sys/kmem.h> 36 #include <sys/module.h> 37 #include <sys/mutex.h> 38 #include <sys/once.h> 39 40 #include <dev/acpi/acpireg.h> 41 #include <dev/acpi/acpivar.h> 42 #include <dev/acpi/acpi_cpu.h> 43 44 #include <machine/acpi_machdep.h> 45 46 #define _COMPONENT ACPI_BUS_COMPONENT 47 ACPI_MODULE_NAME ("acpi_cpu") 48 49 static int acpicpu_match(device_t, cfdata_t, void *); 50 static void acpicpu_attach(device_t, device_t, void *); 51 static int acpicpu_detach(device_t, int); 52 static int acpicpu_once_attach(void); 53 static int acpicpu_once_detach(void); 54 55 static int acpicpu_object(ACPI_HANDLE, struct acpicpu_object *); 56 static cpuid_t acpicpu_id(uint32_t); 57 static uint32_t acpicpu_cap(struct acpicpu_softc *); 58 static ACPI_OBJECT *acpicpu_cap_init(void); 59 static ACPI_STATUS acpicpu_cap_pdc(ACPI_HANDLE); 60 static ACPI_STATUS acpicpu_cap_osc(ACPI_HANDLE, uint32_t *); 61 static const char *acpicpu_cap_oscerr(uint32_t); 62 static void acpicpu_notify(ACPI_HANDLE, uint32_t, void *); 63 static bool acpicpu_suspend(device_t, const pmf_qual_t *); 64 static bool acpicpu_resume(device_t, const pmf_qual_t *); 65 66 struct acpicpu_softc **acpicpu_sc = NULL; 67 68 static const char * const acpicpu_hid[] = { 69 "ACPI0007", 70 NULL 71 }; 72 73 CFATTACH_DECL_NEW(acpicpu, sizeof(struct acpicpu_softc), 74 acpicpu_match, acpicpu_attach, acpicpu_detach, NULL); 75 76 static int 77 acpicpu_match(device_t parent, cfdata_t match, void *aux) 78 { 79 struct acpi_attach_args *aa = aux; 80 struct acpicpu_object ao; 81 int rv; 82 83 if (aa->aa_node->ad_type != ACPI_TYPE_PROCESSOR) 84 return 0; 85 86 if (acpi_match_hid(aa->aa_node->ad_devinfo, acpicpu_hid) != 0) 87 return 1; 88 89 rv = acpicpu_object(aa->aa_node->ad_handle, &ao); 90 91 if (rv != 0 || acpicpu_id(ao.ao_procid) == 0xFFFFFF) 92 return 0; 93 94 return 1; 95 } 96 97 static void 98 acpicpu_attach(device_t parent, device_t self, void *aux) 99 { 100 struct acpicpu_softc *sc = device_private(self); 101 struct acpi_attach_args *aa = aux; 102 static ONCE_DECL(once_attach); 103 int rv; 104 105 rv = acpicpu_object(aa->aa_node->ad_handle, &sc->sc_object); 106 107 if (rv != 0) 108 return; 109 110 rv = RUN_ONCE(&once_attach, acpicpu_once_attach); 111 112 if (rv != 0) 113 return; 114 115 KASSERT(acpicpu_sc != NULL); 116 117 sc->sc_dev = self; 118 sc->sc_cold = false; 119 sc->sc_mapped = false; 120 sc->sc_iot = aa->aa_iot; 121 sc->sc_node = aa->aa_node; 122 sc->sc_cpuid = acpicpu_id(sc->sc_object.ao_procid); 123 124 if (sc->sc_cpuid == 0xFFFFFF) { 125 aprint_error(": invalid CPU ID\n"); 126 return; 127 } 128 129 if (acpicpu_sc[sc->sc_cpuid] != NULL) { 130 aprint_error(": already attached\n"); 131 return; 132 } 133 134 acpicpu_sc[sc->sc_cpuid] = sc; 135 136 sc->sc_cap = acpicpu_cap(sc); 137 sc->sc_flags |= acpicpu_md_quirks(); 138 139 mutex_init(&sc->sc_mtx, MUTEX_DEFAULT, IPL_NONE); 140 141 aprint_naive("\n"); 142 aprint_normal(": ACPI CPU\n"); 143 144 /* 145 * We should claim the bus space. However, we do this only 146 * to announce that the space is in use. As is noted in 147 * ichlpcib(4), we can continue our I/O without bus_space(9). 148 */ 149 if (sc->sc_object.ao_pblklen == 6 && sc->sc_object.ao_pblkaddr != 0) { 150 151 rv = bus_space_map(sc->sc_iot, sc->sc_object.ao_pblkaddr, 152 sc->sc_object.ao_pblklen, 0, &sc->sc_ioh); 153 154 if (rv == 0) 155 sc->sc_mapped = true; 156 } 157 158 acpicpu_cstate_attach(self); 159 acpicpu_pstate_attach(self); 160 161 (void)config_finalize_register(self, acpicpu_cstate_start); 162 (void)config_finalize_register(self, acpicpu_pstate_start); 163 164 (void)acpi_register_notify(sc->sc_node, acpicpu_notify); 165 (void)pmf_device_register(self, acpicpu_suspend, acpicpu_resume); 166 167 aprint_debug_dev(sc->sc_dev, "cap 0x%02x, " 168 "flags 0x%06x\n", sc->sc_cap, sc->sc_flags); 169 } 170 171 static int 172 acpicpu_detach(device_t self, int flags) 173 { 174 struct acpicpu_softc *sc = device_private(self); 175 const bus_addr_t addr = sc->sc_object.ao_pblkaddr; 176 static ONCE_DECL(once_detach); 177 int rv = 0; 178 179 acpi_deregister_notify(sc->sc_node); 180 181 if ((sc->sc_flags & ACPICPU_FLAG_C) != 0) 182 rv = acpicpu_cstate_detach(self); 183 184 if (rv != 0) 185 return rv; 186 187 if ((sc->sc_flags & ACPICPU_FLAG_P) != 0) 188 rv = acpicpu_pstate_detach(self); 189 190 if (rv != 0) 191 return rv; 192 193 rv = RUN_ONCE(&once_detach, acpicpu_once_detach); 194 195 if (rv != 0) 196 return rv; 197 198 if (sc->sc_mapped != false) 199 bus_space_unmap(sc->sc_iot, sc->sc_ioh, addr); 200 201 mutex_destroy(&sc->sc_mtx); 202 203 return 0; 204 } 205 206 static int 207 acpicpu_once_attach(void) 208 { 209 struct acpicpu_softc *sc; 210 unsigned int i; 211 212 acpicpu_sc = kmem_zalloc(maxcpus * sizeof(*sc), KM_SLEEP); 213 214 if (acpicpu_sc == NULL) 215 return ENOMEM; 216 217 for (i = 0; i < maxcpus; i++) 218 acpicpu_sc[i] = NULL; 219 220 return 0; 221 } 222 223 static int 224 acpicpu_once_detach(void) 225 { 226 struct acpicpu_softc *sc; 227 228 KASSERT(acpicpu_sc != NULL); 229 230 kmem_free(acpicpu_sc, maxcpus * sizeof(*sc)); 231 acpicpu_sc = NULL; 232 233 return 0; 234 } 235 236 static int 237 acpicpu_object(ACPI_HANDLE hdl, struct acpicpu_object *ao) 238 { 239 ACPI_OBJECT *obj; 240 ACPI_BUFFER buf; 241 ACPI_STATUS rv; 242 243 rv = acpi_eval_struct(hdl, NULL, &buf); 244 245 if (ACPI_FAILURE(rv)) 246 return 1; 247 248 obj = buf.Pointer; 249 250 if (obj->Type != ACPI_TYPE_PROCESSOR) { 251 rv = AE_TYPE; 252 goto out; 253 } 254 255 if (obj->Processor.ProcId > (uint32_t)maxcpus) { 256 rv = AE_LIMIT; 257 goto out; 258 } 259 260 KDASSERT((uint64_t)obj->Processor.PblkAddress < UINT32_MAX); 261 262 if (ao != NULL) { 263 ao->ao_procid = obj->Processor.ProcId; 264 ao->ao_pblklen = obj->Processor.PblkLength; 265 ao->ao_pblkaddr = obj->Processor.PblkAddress; 266 } 267 268 out: 269 if (buf.Pointer != NULL) 270 ACPI_FREE(buf.Pointer); 271 272 return ACPI_FAILURE(rv) ? 1 : 0; 273 } 274 275 static cpuid_t 276 acpicpu_id(uint32_t id) 277 { 278 CPU_INFO_ITERATOR cii; 279 struct cpu_info *ci; 280 281 for (CPU_INFO_FOREACH(cii, ci)) { 282 283 if (id == ci->ci_acpiid) 284 return id; 285 } 286 287 return 0xFFFFFF; 288 } 289 290 static uint32_t 291 acpicpu_cap(struct acpicpu_softc *sc) 292 { 293 uint32_t cap[3] = { 0 }; 294 ACPI_STATUS rv; 295 int err; 296 297 /* 298 * Set machine-dependent processor capabilities. 299 * 300 * The _PDC was deprecated in ACPI 3.0 in favor of the _OSC, 301 * but firmware may expect that we evaluate it nevertheless. 302 */ 303 rv = acpicpu_cap_pdc(sc->sc_node->ad_handle); 304 305 if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND) 306 aprint_error_dev(sc->sc_dev, "failed to evaluate _PDC: " 307 "%s\n", AcpiFormatException(rv)); 308 309 rv = acpicpu_cap_osc(sc->sc_node->ad_handle, cap); 310 311 if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND) 312 aprint_error_dev(sc->sc_dev, "failed to evaluate _OSC: " 313 "%s\n", AcpiFormatException(rv)); 314 315 if (ACPI_SUCCESS(rv)) { 316 317 err = cap[0] & ~__BIT(0); 318 319 if (err != 0) { 320 aprint_error_dev(sc->sc_dev, "errors in " 321 "_OSC: %s\n", acpicpu_cap_oscerr(err)); 322 cap[2] = 0; 323 } 324 } 325 326 return cap[2]; 327 } 328 329 static ACPI_OBJECT * 330 acpicpu_cap_init(void) 331 { 332 static uint32_t cap[3]; 333 static ACPI_OBJECT obj; 334 335 cap[0] = ACPICPU_PDC_REVID; 336 cap[1] = 1; 337 cap[2] = acpicpu_md_cap(); 338 339 obj.Type = ACPI_TYPE_BUFFER; 340 obj.Buffer.Length = sizeof(cap); 341 obj.Buffer.Pointer = (uint8_t *)cap; 342 343 return &obj; 344 } 345 346 static ACPI_STATUS 347 acpicpu_cap_pdc(ACPI_HANDLE hdl) 348 { 349 ACPI_OBJECT_LIST arg_list; 350 351 arg_list.Count = 1; 352 arg_list.Pointer = acpicpu_cap_init(); 353 354 return AcpiEvaluateObject(hdl, "_PDC", &arg_list, NULL); 355 } 356 357 static ACPI_STATUS 358 acpicpu_cap_osc(ACPI_HANDLE hdl, uint32_t *val) 359 { 360 ACPI_OBJECT_LIST arg_list; 361 ACPI_OBJECT *cap, *obj; 362 ACPI_OBJECT arg[4]; 363 ACPI_BUFFER buf; 364 ACPI_STATUS rv; 365 366 /* Intel. */ 367 static uint8_t cpu_oscuuid[16] = { 368 0x16, 0xA6, 0x77, 0x40, 0x0C, 0x29, 0xBE, 0x47, 369 0x9E, 0xBD, 0xD8, 0x70, 0x58, 0x71, 0x39, 0x53 370 }; 371 372 cap = acpicpu_cap_init(); 373 374 arg_list.Count = 4; 375 arg_list.Pointer = arg; 376 377 arg[0].Type = ACPI_TYPE_BUFFER; 378 arg[0].Buffer.Length = sizeof(cpu_oscuuid); 379 arg[0].Buffer.Pointer = cpu_oscuuid; 380 381 arg[1].Type = ACPI_TYPE_INTEGER; 382 arg[1].Integer.Value = ACPICPU_PDC_REVID; 383 384 arg[2].Type = ACPI_TYPE_INTEGER; 385 arg[2].Integer.Value = cap->Buffer.Length / sizeof(uint32_t); 386 387 arg[3] = *cap; 388 389 buf.Pointer = NULL; 390 buf.Length = ACPI_ALLOCATE_LOCAL_BUFFER; 391 392 rv = AcpiEvaluateObject(hdl, "_OSC", &arg_list, &buf); 393 394 if (ACPI_FAILURE(rv)) 395 return rv; 396 397 obj = buf.Pointer; 398 399 if (obj->Type != ACPI_TYPE_BUFFER) { 400 rv = AE_TYPE; 401 goto out; 402 } 403 404 if (obj->Buffer.Length != cap->Buffer.Length) { 405 rv = AE_BUFFER_OVERFLOW; 406 goto out; 407 } 408 409 (void)memcpy(val, obj->Buffer.Pointer, obj->Buffer.Length); 410 411 out: 412 if (buf.Pointer != NULL) 413 ACPI_FREE(buf.Pointer); 414 415 return rv; 416 } 417 418 static const char * 419 acpicpu_cap_oscerr(uint32_t err) 420 { 421 422 KASSERT((err & __BIT(0)) == 0); 423 424 if ((err & __BIT(1)) != 0) 425 return "_OSC failure"; 426 427 if ((err & __BIT(2)) != 0) 428 return "unrecognized UUID"; 429 430 if ((err & __BIT(3)) != 0) 431 return "unrecognized revision"; 432 433 if ((err & __BIT(4)) != 0) 434 return "capabilities masked"; 435 436 return "unknown error"; 437 } 438 439 static void 440 acpicpu_notify(ACPI_HANDLE hdl, uint32_t evt, void *aux) 441 { 442 ACPI_OSD_EXEC_CALLBACK func; 443 struct acpicpu_softc *sc; 444 device_t self = aux; 445 446 sc = device_private(self); 447 448 switch (evt) { 449 450 case ACPICPU_C_NOTIFY: 451 452 if ((sc->sc_flags & ACPICPU_FLAG_C) == 0) 453 return; 454 455 func = acpicpu_cstate_callback; 456 break; 457 458 case ACPICPU_P_NOTIFY: 459 460 if ((sc->sc_flags & ACPICPU_FLAG_P) == 0) 461 return; 462 463 func = acpicpu_pstate_callback; 464 break; 465 466 case ACPICPU_T_NOTIFY: 467 468 if ((sc->sc_flags & ACPICPU_FLAG_T) == 0) 469 return; 470 471 func = NULL; 472 break; 473 474 default: 475 aprint_error_dev(sc->sc_dev, "unknown notify: 0x%02X\n", evt); 476 return; 477 } 478 479 (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, func, sc->sc_dev); 480 } 481 482 static bool 483 acpicpu_suspend(device_t self, const pmf_qual_t *qual) 484 { 485 struct acpicpu_softc *sc = device_private(self); 486 487 sc->sc_cold = true; 488 489 if ((sc->sc_flags & ACPICPU_FLAG_C) != 0) 490 (void)acpicpu_cstate_suspend(self); 491 492 if ((sc->sc_flags & ACPICPU_FLAG_P) != 0) 493 (void)acpicpu_pstate_suspend(self); 494 495 return true; 496 } 497 498 static bool 499 acpicpu_resume(device_t self, const pmf_qual_t *qual) 500 { 501 struct acpicpu_softc *sc = device_private(self); 502 503 sc->sc_cold = false; 504 505 if ((sc->sc_flags & ACPICPU_FLAG_C) != 0) 506 (void)acpicpu_cstate_resume(self); 507 508 if ((sc->sc_flags & ACPICPU_FLAG_P) != 0) 509 (void)acpicpu_pstate_resume(self); 510 511 return true; 512 } 513 514 #ifdef _MODULE 515 516 MODULE(MODULE_CLASS_DRIVER, acpicpu, NULL); 517 CFDRIVER_DECL(acpicpu, DV_DULL, NULL); 518 519 static int acpicpuloc[] = { -1 }; 520 extern struct cfattach acpicpu_ca; 521 522 static struct cfparent acpiparent = { 523 "acpinodebus", NULL, DVUNIT_ANY 524 }; 525 526 static struct cfdata acpicpu_cfdata[] = { 527 { 528 .cf_name = "acpicpu", 529 .cf_atname = "acpicpu", 530 .cf_unit = 0, 531 .cf_fstate = FSTATE_STAR, 532 .cf_loc = acpicpuloc, 533 .cf_flags = 0, 534 .cf_pspec = &acpiparent, 535 }, 536 537 { NULL, NULL, 0, 0, NULL, 0, NULL } 538 }; 539 540 static int 541 acpicpu_modcmd(modcmd_t cmd, void *context) 542 { 543 int err; 544 545 switch (cmd) { 546 547 case MODULE_CMD_INIT: 548 549 err = config_cfdriver_attach(&acpicpu_cd); 550 551 if (err != 0) 552 return err; 553 554 err = config_cfattach_attach("acpicpu", &acpicpu_ca); 555 556 if (err != 0) { 557 config_cfdriver_detach(&acpicpu_cd); 558 return err; 559 } 560 561 err = config_cfdata_attach(acpicpu_cfdata, 1); 562 563 if (err != 0) { 564 config_cfattach_detach("acpicpu", &acpicpu_ca); 565 config_cfdriver_detach(&acpicpu_cd); 566 return err; 567 } 568 569 return 0; 570 571 case MODULE_CMD_FINI: 572 573 err = config_cfdata_detach(acpicpu_cfdata); 574 575 if (err != 0) 576 return err; 577 578 config_cfattach_detach("acpicpu", &acpicpu_ca); 579 config_cfdriver_detach(&acpicpu_cd); 580 581 return 0; 582 583 default: 584 return ENOTTY; 585 } 586 } 587 588 #endif /* _MODULE */ 589
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