acpi_cpu.c revision 1.9
1 /* $NetBSD: acpi_cpu.c,v 1.9 2010/07/29 22:42:58 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 1.9 2010/07/29 22:42:58 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/once.h> 38 39 #include <dev/acpi/acpireg.h> 40 #include <dev/acpi/acpivar.h> 41 #include <dev/acpi/acpi_cpu.h> 42 43 #include <machine/acpi_machdep.h> 44 45 #define _COMPONENT ACPI_BUS_COMPONENT 46 ACPI_MODULE_NAME ("acpi_cpu") 47 48 static int acpicpu_match(device_t, cfdata_t, void *); 49 static void acpicpu_attach(device_t, device_t, void *); 50 static int acpicpu_detach(device_t, int); 51 static int acpicpu_once_attach(void); 52 static int acpicpu_once_detach(void); 53 54 static int acpicpu_object(ACPI_HANDLE, struct acpicpu_object *); 55 static cpuid_t acpicpu_id(uint32_t); 56 static uint32_t acpicpu_cap(struct acpicpu_softc *); 57 static ACPI_OBJECT *acpicpu_cap_init(void); 58 static ACPI_STATUS acpicpu_cap_pdc(ACPI_HANDLE); 59 static ACPI_STATUS acpicpu_cap_osc(ACPI_HANDLE, uint32_t *); 60 static const char *acpicpu_cap_oscerr(uint32_t); 61 static void acpicpu_notify(ACPI_HANDLE, uint32_t, void *); 62 static bool acpicpu_suspend(device_t, const pmf_qual_t *); 63 static bool acpicpu_resume(device_t, const pmf_qual_t *); 64 65 struct acpicpu_softc **acpicpu_sc = NULL; 66 67 static const char * const acpicpu_hid[] = { 68 "ACPI0007", 69 NULL 70 }; 71 72 CFATTACH_DECL_NEW(acpicpu, sizeof(struct acpicpu_softc), 73 acpicpu_match, acpicpu_attach, acpicpu_detach, NULL); 74 75 static int 76 acpicpu_match(device_t parent, cfdata_t match, void *aux) 77 { 78 struct acpi_attach_args *aa = aux; 79 struct acpicpu_object ao; 80 int rv; 81 82 if (aa->aa_node->ad_type != ACPI_TYPE_PROCESSOR) 83 return 0; 84 85 if (acpi_match_hid(aa->aa_node->ad_devinfo, acpicpu_hid) != 0) 86 return 1; 87 88 rv = acpicpu_object(aa->aa_node->ad_handle, &ao); 89 90 if (rv != 0 || acpicpu_id(ao.ao_procid) == 0xFFFFFF) 91 return 0; 92 93 return 1; 94 } 95 96 static void 97 acpicpu_attach(device_t parent, device_t self, void *aux) 98 { 99 struct acpicpu_softc *sc = device_private(self); 100 struct acpi_attach_args *aa = aux; 101 static ONCE_DECL(once_attach); 102 int rv; 103 104 rv = acpicpu_object(aa->aa_node->ad_handle, &sc->sc_object); 105 106 if (rv != 0) 107 return; 108 109 rv = RUN_ONCE(&once_attach, acpicpu_once_attach); 110 111 if (rv != 0) 112 return; 113 114 KASSERT(acpicpu_sc != NULL); 115 116 sc->sc_dev = self; 117 sc->sc_cold = false; 118 sc->sc_iot = aa->aa_iot; 119 sc->sc_node = aa->aa_node; 120 sc->sc_cpuid = acpicpu_id(sc->sc_object.ao_procid); 121 122 if (sc->sc_cpuid == 0xFFFFFF) { 123 aprint_error(": invalid CPU ID\n"); 124 return; 125 } 126 127 if (acpicpu_sc[sc->sc_cpuid] != NULL) { 128 aprint_error(": already attached\n"); 129 return; 130 } 131 132 acpicpu_sc[sc->sc_cpuid] = sc; 133 134 sc->sc_cap = acpicpu_cap(sc); 135 sc->sc_flags |= acpicpu_md_quirks(); 136 137 aprint_naive("\n"); 138 aprint_normal(": ACPI CPU"); 139 aprint_verbose(", cap 0x%02x, addr 0x%06x, len 0x%02x", 140 sc->sc_cap, sc->sc_object.ao_pblkaddr, sc->sc_object.ao_pblklen); 141 aprint_normal("\n"); 142 143 /* 144 * We should claim the bus space. However, we do this only 145 * to announce that the space is in use. As is noted in 146 * ichlpcib(4), we can continue our I/O without bus_space(9). 147 */ 148 if (sc->sc_object.ao_pblklen == 6 && sc->sc_object.ao_pblkaddr != 0) { 149 150 rv = bus_space_map(sc->sc_iot, sc->sc_object.ao_pblkaddr, 151 sc->sc_object.ao_pblklen, 0, &sc->sc_ioh); 152 153 if (rv != 0) 154 sc->sc_ioh = 0; 155 } 156 157 acpicpu_cstate_attach(self); 158 159 (void)acpi_register_notify(sc->sc_node, acpicpu_notify); 160 (void)config_finalize_register(self, acpicpu_cstate_start); 161 (void)pmf_device_register(self, acpicpu_suspend, acpicpu_resume); 162 } 163 164 static int 165 acpicpu_detach(device_t self, int flags) 166 { 167 struct acpicpu_softc *sc = device_private(self); 168 const bus_addr_t addr = sc->sc_object.ao_pblkaddr; 169 static ONCE_DECL(once_detach); 170 int rv = 0; 171 172 acpi_deregister_notify(sc->sc_node); 173 174 if ((sc->sc_flags & ACPICPU_FLAG_C) != 0) 175 rv = acpicpu_cstate_detach(self); 176 177 if (rv != 0) 178 return rv; 179 180 rv = RUN_ONCE(&once_detach, acpicpu_once_detach); 181 182 if (rv != 0) 183 return rv; 184 185 if (sc->sc_ioh != 0) 186 bus_space_unmap(sc->sc_iot, sc->sc_ioh, addr); 187 188 return 0; 189 } 190 191 static int 192 acpicpu_once_attach(void) 193 { 194 struct acpicpu_softc *sc; 195 unsigned int i; 196 197 acpicpu_sc = kmem_zalloc(maxcpus * sizeof(*sc), KM_SLEEP); 198 199 if (acpicpu_sc == NULL) 200 return ENOMEM; 201 202 for (i = 0; i < maxcpus; i++) 203 acpicpu_sc[i] = NULL; 204 205 return 0; 206 } 207 208 static int 209 acpicpu_once_detach(void) 210 { 211 struct acpicpu_softc *sc; 212 213 KASSERT(acpicpu_sc != NULL); 214 215 kmem_free(acpicpu_sc, maxcpus * sizeof(*sc)); 216 acpicpu_sc = NULL; 217 218 return 0; 219 } 220 221 static int 222 acpicpu_object(ACPI_HANDLE hdl, struct acpicpu_object *ao) 223 { 224 ACPI_OBJECT *obj; 225 ACPI_BUFFER buf; 226 ACPI_STATUS rv; 227 228 rv = acpi_eval_struct(hdl, NULL, &buf); 229 230 if (ACPI_FAILURE(rv)) 231 return 1; 232 233 obj = buf.Pointer; 234 235 if (obj->Type != ACPI_TYPE_PROCESSOR) { 236 rv = AE_TYPE; 237 goto out; 238 } 239 240 if (obj->Processor.ProcId > (uint32_t)maxcpus) { 241 rv = AE_LIMIT; 242 goto out; 243 } 244 245 KDASSERT((uint64_t)obj->Processor.PblkAddress < UINT32_MAX); 246 247 if (ao != NULL) { 248 ao->ao_procid = obj->Processor.ProcId; 249 ao->ao_pblklen = obj->Processor.PblkLength; 250 ao->ao_pblkaddr = obj->Processor.PblkAddress; 251 } 252 253 out: 254 if (buf.Pointer != NULL) 255 ACPI_FREE(buf.Pointer); 256 257 return ACPI_FAILURE(rv) ? 1 : 0; 258 } 259 260 static cpuid_t 261 acpicpu_id(uint32_t id) 262 { 263 CPU_INFO_ITERATOR cii; 264 struct cpu_info *ci; 265 266 for (CPU_INFO_FOREACH(cii, ci)) { 267 268 if (id == ci->ci_cpuid) 269 return id; 270 } 271 272 return 0xFFFFFF; 273 } 274 275 static uint32_t 276 acpicpu_cap(struct acpicpu_softc *sc) 277 { 278 uint32_t cap[3] = { 0 }; 279 ACPI_STATUS rv; 280 int err; 281 282 /* 283 * Set machine-dependent processor capabilities. 284 * 285 * The _PDC was deprecated in ACPI 3.0 in favor of the _OSC, 286 * but firmware may expect that we evaluate it nevertheless. 287 */ 288 rv = acpicpu_cap_pdc(sc->sc_node->ad_handle); 289 290 if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND) 291 aprint_error_dev(sc->sc_dev, "failed to evaluate _PDC: " 292 "%s\n", AcpiFormatException(rv)); 293 294 rv = acpicpu_cap_osc(sc->sc_node->ad_handle, cap); 295 296 if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND) 297 aprint_error_dev(sc->sc_dev, "failed to evaluate _OSC: " 298 "%s\n", AcpiFormatException(rv)); 299 300 if (ACPI_SUCCESS(rv)) { 301 302 err = cap[0] & ~__BIT(0); 303 304 if (err != 0) { 305 aprint_error_dev(sc->sc_dev, "errors in " 306 "_OSC: %s\n", acpicpu_cap_oscerr(err)); 307 cap[2] = 0; 308 } 309 } 310 311 return cap[2]; 312 } 313 314 static ACPI_OBJECT * 315 acpicpu_cap_init(void) 316 { 317 static uint32_t cap[3]; 318 static ACPI_OBJECT obj; 319 320 cap[0] = ACPICPU_PDC_REVID; 321 cap[1] = 1; 322 cap[2] = acpicpu_md_cap(); 323 324 obj.Type = ACPI_TYPE_BUFFER; 325 obj.Buffer.Length = sizeof(cap); 326 obj.Buffer.Pointer = (uint8_t *)cap; 327 328 return &obj; 329 } 330 331 static ACPI_STATUS 332 acpicpu_cap_pdc(ACPI_HANDLE hdl) 333 { 334 ACPI_OBJECT_LIST arg_list; 335 336 arg_list.Count = 1; 337 arg_list.Pointer = acpicpu_cap_init(); 338 339 return AcpiEvaluateObject(hdl, "_PDC", &arg_list, NULL); 340 } 341 342 static ACPI_STATUS 343 acpicpu_cap_osc(ACPI_HANDLE hdl, uint32_t *val) 344 { 345 ACPI_OBJECT_LIST arg_list; 346 ACPI_OBJECT *cap, *obj; 347 ACPI_OBJECT arg[4]; 348 ACPI_BUFFER buf; 349 ACPI_STATUS rv; 350 351 /* Intel. */ 352 static uint8_t cpu_oscuuid[16] = { 353 0x16, 0xA6, 0x77, 0x40, 0x0C, 0x29, 0xBE, 0x47, 354 0x9E, 0xBD, 0xD8, 0x70, 0x58, 0x71, 0x39, 0x53 355 }; 356 357 cap = acpicpu_cap_init(); 358 359 arg_list.Count = 4; 360 arg_list.Pointer = arg; 361 362 arg[0].Type = ACPI_TYPE_BUFFER; 363 arg[0].Buffer.Length = sizeof(cpu_oscuuid); 364 arg[0].Buffer.Pointer = cpu_oscuuid; 365 366 arg[1].Type = ACPI_TYPE_INTEGER; 367 arg[1].Integer.Value = ACPICPU_PDC_REVID; 368 369 arg[2].Type = ACPI_TYPE_INTEGER; 370 arg[2].Integer.Value = cap->Buffer.Length / sizeof(uint32_t); 371 372 arg[3] = *cap; 373 374 buf.Pointer = NULL; 375 buf.Length = ACPI_ALLOCATE_LOCAL_BUFFER; 376 377 rv = AcpiEvaluateObject(hdl, "_OSC", &arg_list, &buf); 378 379 if (ACPI_FAILURE(rv)) 380 return rv; 381 382 obj = buf.Pointer; 383 384 if (obj->Type != ACPI_TYPE_BUFFER) { 385 rv = AE_TYPE; 386 goto out; 387 } 388 389 if (obj->Buffer.Length != cap->Buffer.Length) { 390 rv = AE_BUFFER_OVERFLOW; 391 goto out; 392 } 393 394 (void)memcpy(val, obj->Buffer.Pointer, obj->Buffer.Length); 395 396 out: 397 if (buf.Pointer != NULL) 398 ACPI_FREE(buf.Pointer); 399 400 return rv; 401 } 402 403 static const char * 404 acpicpu_cap_oscerr(uint32_t err) 405 { 406 407 KASSERT((err & __BIT(0)) == 0); 408 409 if ((err & __BIT(1)) != 0) 410 return "_OSC failure"; 411 412 if ((err & __BIT(2)) != 0) 413 return "unrecognized UUID"; 414 415 if ((err & __BIT(3)) != 0) 416 return "unrecognized revision"; 417 418 if ((err & __BIT(4)) != 0) 419 return "capabilities masked"; 420 421 return "unknown error"; 422 } 423 424 static void 425 acpicpu_notify(ACPI_HANDLE hdl, uint32_t evt, void *aux) 426 { 427 ACPI_OSD_EXEC_CALLBACK func; 428 struct acpicpu_softc *sc; 429 device_t self = aux; 430 431 sc = device_private(self); 432 433 switch (evt) { 434 435 case ACPICPU_C_NOTIFY: 436 437 if ((sc->sc_flags & ACPICPU_FLAG_C) == 0) 438 return; 439 440 func = acpicpu_cstate_callback; 441 break; 442 443 case ACPICPU_P_NOTIFY: 444 445 if ((sc->sc_flags & ACPICPU_FLAG_P) == 0) 446 return; 447 448 func = NULL; 449 break; 450 451 case ACPICPU_T_NOTIFY: 452 453 if ((sc->sc_flags & ACPICPU_FLAG_T) == 0) 454 return; 455 456 func = NULL; 457 break; 458 459 default: 460 aprint_error_dev(sc->sc_dev, "unknown notify: 0x%02X\n", evt); 461 return; 462 } 463 464 (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, func, sc->sc_dev); 465 } 466 467 static bool 468 acpicpu_suspend(device_t self, const pmf_qual_t *qual) 469 { 470 struct acpicpu_softc *sc = device_private(self); 471 472 sc->sc_cold = true; 473 474 if ((sc->sc_flags & ACPICPU_FLAG_C) != 0) 475 (void)acpicpu_cstate_suspend(self); 476 477 return true; 478 } 479 480 static bool 481 acpicpu_resume(device_t self, const pmf_qual_t *qual) 482 { 483 struct acpicpu_softc *sc = device_private(self); 484 485 sc->sc_cold = false; 486 487 if ((sc->sc_flags & ACPICPU_FLAG_C) != 0) 488 (void)acpicpu_cstate_resume(self); 489 490 return true; 491 } 492 493 #ifdef _MODULE 494 495 MODULE(MODULE_CLASS_DRIVER, acpicpu, NULL); 496 CFDRIVER_DECL(acpicpu, DV_DULL, NULL); 497 498 static int acpicpuloc[] = { -1 }; 499 extern struct cfattach acpicpu_ca; 500 501 static struct cfparent acpiparent = { 502 "acpinodebus", NULL, DVUNIT_ANY 503 }; 504 505 static struct cfdata acpicpu_cfdata[] = { 506 { 507 .cf_name = "acpicpu", 508 .cf_atname = "acpicpu", 509 .cf_unit = 0, 510 .cf_fstate = FSTATE_STAR, 511 .cf_loc = acpicpuloc, 512 .cf_flags = 0, 513 .cf_pspec = &acpiparent, 514 }, 515 516 { NULL, NULL, 0, 0, NULL, 0, NULL } 517 }; 518 519 static int 520 acpicpu_modcmd(modcmd_t cmd, void *context) 521 { 522 int err; 523 524 switch (cmd) { 525 526 case MODULE_CMD_INIT: 527 528 err = config_cfdriver_attach(&acpicpu_cd); 529 530 if (err != 0) 531 return err; 532 533 err = config_cfattach_attach("acpicpu", &acpicpu_ca); 534 535 if (err != 0) { 536 config_cfdriver_detach(&acpicpu_cd); 537 return err; 538 } 539 540 err = config_cfdata_attach(acpicpu_cfdata, 1); 541 542 if (err != 0) { 543 config_cfattach_detach("acpicpu", &acpicpu_ca); 544 config_cfdriver_detach(&acpicpu_cd); 545 return err; 546 } 547 548 return 0; 549 550 case MODULE_CMD_FINI: 551 552 err = config_cfdata_detach(acpicpu_cfdata); 553 554 if (err != 0) 555 return err; 556 557 config_cfattach_detach("acpicpu", &acpicpu_ca); 558 config_cfdriver_detach(&acpicpu_cd); 559 560 return 0; 561 562 default: 563 return ENOTTY; 564 } 565 } 566 567 #endif /* _MODULE */ 568
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