sys/dev/acpica/acpi_cpu_pstate.c

   1 /*
   2  * Copyright (c) 2009 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Sepherosa Ziehau <sepherosa@gmail.com>
   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
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "opt_acpi.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/bus.h>
  39 #include <sys/kernel.h>
  40 #include <sys/malloc.h>
  41 #include <sys/queue.h>
  42 #include <sys/rman.h>
  43 #include <sys/sysctl.h>
  44 #include <sys/msgport2.h>
  45 #include <sys/cpu_topology.h>
  46
  47 #include <net/netisr2.h>
  48 #include <net/netmsg2.h>
  49 #include <net/if_var.h>
  50
  51 #include "acpi.h"
  52 #include "acpivar.h"
  53 #include "acpi_cpu.h"
  54 #include "acpi_cpu_pstate.h"
  55
  56 #define ACPI_NPSTATE_MAX        16
  57
  58 #define ACPI_PSS_PX_NENTRY      6
  59
  60 #define ACPI_PSD_COORD_SWALL    0xfc
  61 #define ACPI_PSD_COORD_SWANY    0xfd
  62 #define ACPI_PSD_COORD_HWALL    0xfe
  63 #define ACPI_PSD_COORD_VALID(coord) \
  64         ((coord) == ACPI_PSD_COORD_SWALL || \
  65          (coord) == ACPI_PSD_COORD_SWANY || \
  66          (coord) == ACPI_PSD_COORD_HWALL)
  67
  68 struct acpi_pst_softc;
  69 LIST_HEAD(acpi_pst_list, acpi_pst_softc);
  70
  71 struct netmsg_acpi_pst {
  72         struct netmsg_base base;
  73         const struct acpi_pst_res *ctrl;
  74         const struct acpi_pst_res *status;
  75 };
  76
  77 struct acpi_pst_domain {
  78         uint32_t                pd_dom;
  79         uint32_t                pd_coord;
  80         uint32_t                pd_nproc;
  81         LIST_ENTRY(acpi_pst_domain) pd_link;
  82
  83         uint32_t                pd_flags;
  84
  85         int                     pd_state;
  86         int                     pd_sstart;
  87         struct acpi_pst_list    pd_pstlist;
  88
  89         struct sysctl_ctx_list  pd_sysctl_ctx;
  90         struct sysctl_oid       *pd_sysctl_tree;
  91 };
  92 LIST_HEAD(acpi_pst_domlist, acpi_pst_domain);
  93
  94 #define ACPI_PSTDOM_FLAG_STUB   0x1     /* stub domain, no _PSD */
  95 #define ACPI_PSTDOM_FLAG_DEAD   0x2     /* domain can't be started */
  96 #define ACPI_PSTDOM_FLAG_INT    0x4     /* domain created from Integer _PSD */
  97
  98 struct acpi_pst_softc {
  99         device_t                pst_dev;
 100         struct acpi_cpu_softc   *pst_parent;
 101         struct acpi_pst_domain  *pst_domain;
 102         struct acpi_pst_res     pst_creg;
 103         struct acpi_pst_res     pst_sreg;
 104
 105         int                     pst_state;
 106         int                     pst_sstart;
 107         int                     pst_cpuid;
 108
 109         ACPI_HANDLE             pst_handle;
 110
 111         LIST_ENTRY(acpi_pst_softc) pst_link;
 112 };
 113
 114 static int      acpi_pst_probe(device_t dev);
 115 static int      acpi_pst_attach(device_t dev);
 116
 117 static void     acpi_pst_postattach(void *);
 118 static struct acpi_pst_domain *
 119                 acpi_pst_domain_create_int(device_t, uint32_t);
 120 static struct acpi_pst_domain *
 121                 acpi_pst_domain_create_pkg(device_t, ACPI_OBJECT *);
 122 static struct acpi_pst_domain *
 123                 acpi_pst_domain_find(uint32_t);
 124 static struct acpi_pst_domain *
 125                 acpi_pst_domain_alloc(uint32_t, uint32_t, uint32_t);
 126 static int      acpi_pst_domain_set_pstate(struct acpi_pst_domain *, int);
 127 static void     acpi_pst_domain_check_nproc(device_t, struct acpi_pst_domain *);
 128 static int      acpi_pst_global_set_pstate(int);
 129
 130 static int      acpi_pst_check_csr(struct acpi_pst_softc *);
 131 static int      acpi_pst_check_pstates(struct acpi_pst_softc *);
 132 static int      acpi_pst_init(struct acpi_pst_softc *);
 133 static int      acpi_pst_set_pstate(struct acpi_pst_softc *,
 134                     const struct acpi_pstate *);
 135 static const struct acpi_pstate *
 136                 acpi_pst_get_pstate(struct acpi_pst_softc *);
 137 static int      acpi_pst_alloc_resource(device_t, ACPI_OBJECT *, int,
 138                     struct acpi_pst_res *);
 139
 140 static void     acpi_pst_check_csr_handler(netmsg_t);
 141 static void     acpi_pst_check_pstates_handler(netmsg_t);
 142 static void     acpi_pst_init_handler(netmsg_t);
 143 static void     acpi_pst_set_pstate_handler(netmsg_t);
 144 static void     acpi_pst_get_pstate_handler(netmsg_t);
 145
 146 static int      acpi_pst_sysctl_freqs(SYSCTL_HANDLER_ARGS);
 147 static int      acpi_pst_sysctl_freqs_bin(SYSCTL_HANDLER_ARGS);
 148 static int      acpi_pst_sysctl_members(SYSCTL_HANDLER_ARGS);
 149 static int      acpi_pst_sysctl_select(SYSCTL_HANDLER_ARGS);
 150 static int      acpi_pst_sysctl_global(SYSCTL_HANDLER_ARGS);
 151
 152 static struct acpi_pst_domlist  acpi_pst_domains =
 153         LIST_HEAD_INITIALIZER(acpi_pst_domains);
 154 static int                      acpi_pst_domain_id;
 155
 156 static int                      acpi_pst_global_state;
 157
 158 static int                      acpi_npstates;
 159 static struct acpi_pstate       *acpi_pstates;
 160
 161 static const struct acpi_pst_md *acpi_pst_md;
 162
 163 static int                      acpi_pst_ht_reuse_domain = 1;
 164 TUNABLE_INT("hw.acpi.cpu.pst.ht_reuse_domain", &acpi_pst_ht_reuse_domain);
 165
 166 static int                      acpi_pst_force_pkg_domain = 0;
 167 TUNABLE_INT("hw.acpi.cpu.pst.force_pkg_domain", &acpi_pst_force_pkg_domain);
 168
 169 static device_method_t acpi_pst_methods[] = {
 170         /* Device interface */
 171         DEVMETHOD(device_probe,                 acpi_pst_probe),
 172         DEVMETHOD(device_attach,                acpi_pst_attach),
 173         DEVMETHOD(device_detach,                bus_generic_detach),
 174         DEVMETHOD(device_shutdown,              bus_generic_shutdown),
 175         DEVMETHOD(device_suspend,               bus_generic_suspend),
 176         DEVMETHOD(device_resume,                bus_generic_resume),
 177
 178         /* Bus interface */
 179         DEVMETHOD(bus_add_child,                bus_generic_add_child),
 180         DEVMETHOD(bus_print_child,              bus_generic_print_child),
 181         DEVMETHOD(bus_read_ivar,                bus_generic_read_ivar),
 182         DEVMETHOD(bus_write_ivar,               bus_generic_write_ivar),
 183         DEVMETHOD(bus_get_resource_list,        bus_generic_get_resource_list),
 184         DEVMETHOD(bus_set_resource,             bus_generic_rl_set_resource),
 185         DEVMETHOD(bus_get_resource,             bus_generic_rl_get_resource),
 186         DEVMETHOD(bus_alloc_resource,           bus_generic_alloc_resource),
 187         DEVMETHOD(bus_release_resource,         bus_generic_release_resource),
 188         DEVMETHOD(bus_driver_added,             bus_generic_driver_added),
 189         DEVMETHOD(bus_activate_resource,        bus_generic_activate_resource),
 190         DEVMETHOD(bus_deactivate_resource,      bus_generic_deactivate_resource),
 191         DEVMETHOD(bus_setup_intr,               bus_generic_setup_intr),
 192         DEVMETHOD(bus_teardown_intr,            bus_generic_teardown_intr),
 193
 194         DEVMETHOD_END
 195 };
 196
 197 static driver_t acpi_pst_driver = {
 198         "cpu_pst",
 199         acpi_pst_methods,
 200         sizeof(struct acpi_pst_softc)
 201 };
 202
 203 static devclass_t acpi_pst_devclass;
 204 DRIVER_MODULE(cpu_pst, cpu, acpi_pst_driver, acpi_pst_devclass, NULL, NULL);
 205 MODULE_DEPEND(cpu_pst, acpi, 1, 1, 1);
 206
 207 static __inline int
 208 acpi_pst_freq2index(int freq)
 209 {
 210         int i;
 211
 212         for (i = 0; i < acpi_npstates; ++i) {
 213                 if (acpi_pstates[i].st_freq == freq)
 214                         return i;
 215         }
 216         return -1;
 217 }
 218
 219 static int
 220 acpi_pst_probe(device_t dev)
 221 {
 222         ACPI_BUFFER buf;
 223         ACPI_HANDLE handle;
 224         ACPI_STATUS status;
 225         ACPI_OBJECT *obj;
 226
 227         if (acpi_disabled("cpu_pst") ||
 228             acpi_get_type(dev) != ACPI_TYPE_PROCESSOR)
 229                 return ENXIO;
 230
 231         if (acpi_pst_md == NULL)
 232                 acpi_pst_md = acpi_pst_md_probe();
 233
 234         handle = acpi_get_handle(dev);
 235
 236         /*
 237          * Check _PSD package
 238          *
 239          * NOTE:
 240          * Some BIOSes do not expose _PCT for the second thread of
 241          * CPU cores.  In this case, _PSD should be enough to get the
 242          * P-state of the second thread working, since it must have
 243          * the same _PCT and _PSS as the first thread in the same
 244          * core.
 245          */
 246         buf.Pointer = NULL;
 247         buf.Length = ACPI_ALLOCATE_BUFFER;
 248         status = AcpiEvaluateObject(handle, "_PSD", NULL, &buf);
 249         if (!ACPI_FAILURE(status)) {
 250                 AcpiOsFree((ACPI_OBJECT *)buf.Pointer);
 251                 goto done;
 252         }
 253
 254         /*
 255          * Check _PCT package
 256          */
 257         buf.Pointer = NULL;
 258         buf.Length = ACPI_ALLOCATE_BUFFER;
 259         status = AcpiEvaluateObject(handle, "_PCT", NULL, &buf);
 260         if (ACPI_FAILURE(status)) {
 261                 if (bootverbose) {
 262                         device_printf(dev, "Can't get _PCT package - %s\n",
 263                                       AcpiFormatException(status));
 264                 }
 265                 return ENXIO;
 266         }
 267
 268         obj = (ACPI_OBJECT *)buf.Pointer;
 269         if (!ACPI_PKG_VALID_EQ(obj, 2)) {
 270                 device_printf(dev, "Invalid _PCT package\n");
 271                 AcpiOsFree(obj);
 272                 return ENXIO;
 273         }
 274         AcpiOsFree(obj);
 275
 276         /*
 277          * Check _PSS package
 278          */
 279         buf.Pointer = NULL;
 280         buf.Length = ACPI_ALLOCATE_BUFFER;
 281         status = AcpiEvaluateObject(handle, "_PSS", NULL, &buf);
 282         if (ACPI_FAILURE(status)) {
 283                 device_printf(dev, "Can't get _PSS package - %s\n",
 284                               AcpiFormatException(status));
 285                 return ENXIO;
 286         }
 287
 288         obj = (ACPI_OBJECT *)buf.Pointer;
 289         if (!ACPI_PKG_VALID(obj, 1)) {
 290                 device_printf(dev, "Invalid _PSS package\n");
 291                 AcpiOsFree(obj);
 292                 return ENXIO;
 293         }
 294         AcpiOsFree(obj);
 295
 296 done:
 297         device_set_desc(dev, "ACPI CPU P-State");
 298         return 0;
 299 }
 300
 301 static int
 302 acpi_pst_attach(device_t dev)
 303 {
 304         struct acpi_pst_softc *sc = device_get_softc(dev);
 305         struct acpi_pst_domain *dom = NULL;
 306         ACPI_BUFFER buf;
 307         ACPI_STATUS status;
 308         ACPI_OBJECT *obj;
 309         struct acpi_pstate *pstate, *p;
 310         int i, npstate, error;
 311
 312         sc->pst_dev = dev;
 313         sc->pst_parent = device_get_softc(device_get_parent(dev));
 314         sc->pst_handle = acpi_get_handle(dev);
 315         sc->pst_cpuid = acpi_get_magic(dev);
 316
 317         /*
 318          * If there is a _PSD, then we create procossor domain
 319          * accordingly.  If there is no _PSD, we just fake a
 320          * default processor domain0.
 321          */
 322         buf.Pointer = NULL;
 323         buf.Length = ACPI_ALLOCATE_BUFFER;
 324         status = AcpiEvaluateObject(sc->pst_handle, "_PSD", NULL, &buf);
 325         if (!ACPI_FAILURE(status)) {
 326                 obj = (ACPI_OBJECT *)buf.Pointer;
 327
 328                 if (acpi_pst_domain_id > 0) {
 329                         device_printf(dev, "Missing _PSD for certain CPUs\n");
 330                         AcpiOsFree(obj);
 331                         return ENXIO;
 332                 }
 333                 acpi_pst_domain_id = -1;
 334
 335                 if (ACPI_PKG_VALID_EQ(obj, 1)) {
 336                         dom = acpi_pst_domain_create_pkg(dev,
 337                                 &obj->Package.Elements[0]);
 338                         if (dom == NULL) {
 339                                 AcpiOsFree(obj);
 340                                 return ENXIO;
 341                         }
 342                 } else {
 343                         if (obj->Type != ACPI_TYPE_INTEGER) {
 344                                 device_printf(dev,
 345                                     "Invalid _PSD package, Type 0x%x\n",
 346                                     obj->Type);
 347                                 AcpiOsFree(obj);
 348                                 return ENXIO;
 349                         } else {
 350                                 device_printf(dev, "Integer _PSD %ju\n",
 351                                     (uintmax_t)obj->Integer.Value);
 352                                 dom = acpi_pst_domain_create_int(dev,
 353                                     obj->Integer.Value);
 354                                 if (dom == NULL) {
 355                                         AcpiOsFree(obj);
 356                                         return ENXIO;
 357                                 }
 358                         }
 359                 }
 360
 361                 /* Free _PSD */
 362                 AcpiOsFree(buf.Pointer);
 363         } else {
 364                 if (acpi_pst_domain_id < 0) {
 365                         device_printf(dev, "Missing _PSD for cpu%d\n",
 366                             sc->pst_cpuid);
 367                         return ENXIO;
 368                 }
 369
 370                 /*
 371                  * Create a stub one processor domain for each processor
 372                  */
 373                 dom = acpi_pst_domain_alloc(acpi_pst_domain_id,
 374                         ACPI_PSD_COORD_SWANY, 1);
 375                 dom->pd_flags |= ACPI_PSTDOM_FLAG_STUB;
 376
 377                 ++acpi_pst_domain_id;
 378         }
 379
 380         /* Make sure that adding us will not overflow our domain */
 381         acpi_pst_domain_check_nproc(dev, dom);
 382
 383         /*
 384          * Get control/status registers from _PCT
 385          */
 386         buf.Pointer = NULL;
 387         buf.Length = ACPI_ALLOCATE_BUFFER;
 388         status = AcpiEvaluateObject(sc->pst_handle, "_PCT", NULL, &buf);
 389         if (ACPI_FAILURE(status)) {
 390                 struct acpi_pst_softc *pst;
 391
 392                 /*
 393                  * No _PCT.  See the comment in acpi_pst_probe() near
 394                  * _PSD check.
 395                  *
 396                  * Use control/status registers of another CPU in the
 397                  * same domain, or in the same core, if the type of
 398                  * these registers are "Fixed Hardware", e.g. on most
 399                  * of the model Intel CPUs.
 400                  */
 401                 pst = LIST_FIRST(&dom->pd_pstlist);
 402                 if (pst == NULL) {
 403                         cpumask_t mask;
 404
 405                         mask = get_cpumask_from_level(sc->pst_cpuid,
 406                             CORE_LEVEL);
 407                         if (CPUMASK_TESTNZERO(mask)) {
 408                                 struct acpi_pst_domain *dom1;
 409
 410                                 LIST_FOREACH(dom1, &acpi_pst_domains, pd_link) {
 411                                         LIST_FOREACH(pst, &dom1->pd_pstlist,
 412                                             pst_link) {
 413                                                 if (CPUMASK_TESTBIT(mask,
 414                                                     pst->pst_cpuid))
 415                                                         break;
 416                                         }
 417                                         if (pst != NULL)
 418                                                 break;
 419                                 }
 420                                 if (pst != NULL && acpi_pst_ht_reuse_domain) {
 421                                         /*
 422                                          * Use the same domain for CPUs in the
 423                                          * same core.
 424                                          */
 425                                         device_printf(dev, "Destroy domain%u, "
 426                                             "reuse domain%u\n",
 427                                             dom->pd_dom, dom1->pd_dom);
 428                                         LIST_REMOVE(dom, pd_link);
 429                                         kfree(dom, M_DEVBUF);
 430                                         dom = dom1;
 431                                         /*
 432                                          * Make sure that adding us will not
 433                                          * overflow the domain containing
 434                                          * siblings in the same core.
 435                                          */
 436                                         acpi_pst_domain_check_nproc(dev, dom);
 437                                 }
 438                         }
 439                 }
 440                 if (pst != NULL &&
 441                     pst->pst_creg.pr_res == NULL &&
 442                     pst->pst_creg.pr_rid == 0 &&
 443                     pst->pst_creg.pr_gas.SpaceId ==
 444                     ACPI_ADR_SPACE_FIXED_HARDWARE &&
 445                     pst->pst_sreg.pr_res == NULL &&
 446                     pst->pst_sreg.pr_rid == 0 &&
 447                     pst->pst_sreg.pr_gas.SpaceId ==
 448                     ACPI_ADR_SPACE_FIXED_HARDWARE) {
 449                         sc->pst_creg = pst->pst_creg;
 450                         sc->pst_sreg = pst->pst_sreg;
 451                         device_printf(dev,
 452                             "No _PCT; reuse %s control/status regs\n",
 453                             device_get_nameunit(pst->pst_dev));
 454                         goto fetch_pss;
 455                 }
 456                 device_printf(dev, "Can't get _PCT package - %s\n",
 457                               AcpiFormatException(status));
 458                 return ENXIO;
 459         }
 460
 461         obj = (ACPI_OBJECT *)buf.Pointer;
 462         if (!ACPI_PKG_VALID_EQ(obj, 2)) {
 463                 device_printf(dev, "Invalid _PCT package\n");
 464                 AcpiOsFree(obj);
 465                 return ENXIO;
 466         }
 467
 468         /* Save and try allocating control register */
 469         error = acpi_pst_alloc_resource(dev, obj, 0, &sc->pst_creg);
 470         if (error) {
 471                 AcpiOsFree(obj);
 472                 return error;
 473         }
 474         if (bootverbose) {
 475                 device_printf(dev, "control reg %d %jx\n",
 476                               sc->pst_creg.pr_gas.SpaceId,
 477                               (uintmax_t)sc->pst_creg.pr_gas.Address);
 478         }
 479
 480         /* Save and try allocating status register */
 481         error = acpi_pst_alloc_resource(dev, obj, 1, &sc->pst_sreg);
 482         if (error) {
 483                 AcpiOsFree(obj);
 484                 return error;
 485         }
 486         if (bootverbose) {
 487                 device_printf(dev, "status reg %d %jx\n",
 488                               sc->pst_sreg.pr_gas.SpaceId,
 489                               (uintmax_t)sc->pst_sreg.pr_gas.Address);
 490         }
 491
 492         /* Free _PCT */
 493         AcpiOsFree(obj);
 494
 495 fetch_pss:
 496         /*
 497          * Create P-State table according to _PSS
 498          */
 499         buf.Pointer = NULL;
 500         buf.Length = ACPI_ALLOCATE_BUFFER;
 501         status = AcpiEvaluateObject(sc->pst_handle, "_PSS", NULL, &buf);
 502         if (ACPI_FAILURE(status)) {
 503                 /*
 504                  * No _PSS.  See the comment in acpi_pst_probe() near
 505                  * _PSD check.
 506                  *
 507                  * Assume _PSS are same across all CPUs; well, they
 508                  * should/have to be so.
 509                  */
 510                 if (acpi_npstates > 0 && acpi_pstates != NULL) {
 511                         device_printf(dev, "No _PSS\n");
 512                         goto fetch_ppc;
 513                 }
 514                 device_printf(dev, "Can't get _PSS package - %s\n",
 515                               AcpiFormatException(status));
 516                 return ENXIO;
 517         }
 518
 519         obj = (ACPI_OBJECT *)buf.Pointer;
 520         if (!ACPI_PKG_VALID(obj, 1)) {
 521                 device_printf(dev, "Invalid _PSS package\n");
 522                 AcpiOsFree(obj);
 523                 return ENXIO;
 524         }
 525
 526         /* Don't create too many P-States */
 527         npstate = obj->Package.Count;
 528         if (npstate > ACPI_NPSTATE_MAX) {
 529                 device_printf(dev, "Too many P-States, %d->%d\n",
 530                               npstate, ACPI_NPSTATE_MAX);
 531                 npstate = ACPI_NPSTATE_MAX;
 532         }
 533
 534         /*
 535          * If we have already created P-State table,
 536          * we must make sure that number of entries
 537          * is consistent.
 538          */
 539         if (acpi_pstates != NULL && acpi_npstates != npstate) {
 540                 device_printf(dev, "Inconsistent # of P-States "
 541                               "cross Processor objects\n");
 542                 AcpiOsFree(obj);
 543                 return ENXIO;
 544         }
 545
 546         /*
 547          * Create a temporary P-State table
 548          */
 549         pstate = kmalloc(sizeof(*pstate) * npstate, M_TEMP, M_WAITOK);
 550         for (i = 0, p = pstate; i < npstate; ++i, ++p) {
 551                 ACPI_OBJECT *pkg;
 552                 uint32_t *ptr[ACPI_PSS_PX_NENTRY] = {
 553                         &p->st_freq, &p->st_power, &p->st_xsit_lat,
 554                         &p->st_bm_lat, &p->st_cval, &p->st_sval
 555                 };
 556                 int j;
 557
 558                 pkg = &obj->Package.Elements[i];
 559                 if (!ACPI_PKG_VALID(pkg, ACPI_PSS_PX_NENTRY)) {
 560                         device_printf(dev, "Invalud _PSS P%d\n", i);
 561                         AcpiOsFree(obj);
 562                         kfree(pstate, M_TEMP);
 563                         return ENXIO;
 564                 }
 565                 for (j = 0; j < ACPI_PSS_PX_NENTRY; ++j) {
 566                         if (acpi_PkgInt32(pkg, j, ptr[j]) != 0) {
 567                                 device_printf(dev, "Can't extract "
 568                                               "_PSS P%d %dth entry\n", i, j);
 569                                 AcpiOsFree(obj);
 570                                 kfree(pstate, M_TEMP);
 571                                 return ENXIO;
 572                         }
 573                 }
 574         }
 575
 576         /* Free _PSS */
 577         AcpiOsFree(obj);
 578
 579         if (acpi_pstates == NULL) {
 580                 /*
 581                  * If no P-State table is created yet,
 582                  * save the temporary one we just created.
 583                  */
 584                 acpi_pstates = pstate;
 585                 acpi_npstates = npstate;
 586                 pstate = NULL;
 587
 588                 if (bootverbose) {
 589                         for (i = 0; i < acpi_npstates; ++i) {
 590                                 device_printf(dev,
 591                                 "freq %u, pwr %u, xlat %u, blat %u, "
 592                                 "cv %08x, sv %08x\n",
 593                                 acpi_pstates[i].st_freq,
 594                                 acpi_pstates[i].st_power,
 595                                 acpi_pstates[i].st_xsit_lat,
 596                                 acpi_pstates[i].st_bm_lat,
 597                                 acpi_pstates[i].st_cval,
 598                                 acpi_pstates[i].st_sval);
 599                         }
 600                 }
 601         } else {
 602                 /*
 603                  * Make sure that P-State tables are same
 604                  * for all processors.
 605                  */
 606                 if (memcmp(pstate, acpi_pstates,
 607                            sizeof(*pstate) * npstate) != 0) {
 608                         device_printf(dev, "Inconsistent _PSS "
 609                                       "cross Processor objects\n");
 610 #if 0
 611                         /*
 612                          * Some BIOSes create different P-State tables;
 613                          * just trust the one from the BSP and move on.
 614                          */
 615                         kfree(pstate, M_TEMP);
 616                         return ENXIO;
 617 #endif
 618                 }
 619                 kfree(pstate, M_TEMP);
 620         }
 621
 622 fetch_ppc:
 623         /* By default, we start from P-State table's first entry */
 624         sc->pst_sstart = 0;
 625
 626         /*
 627          * Adjust the usable first entry of P-State table,
 628          * if there is _PPC object.
 629          */
 630         buf.Pointer = NULL;
 631         buf.Length = ACPI_ALLOCATE_BUFFER;
 632         status = AcpiEvaluateObject(sc->pst_handle, "_PPC", NULL, &buf);
 633         if (!ACPI_FAILURE(status)) {
 634                 obj = (ACPI_OBJECT *)buf.Pointer;
 635                 if (obj->Type == ACPI_TYPE_INTEGER) {
 636                         if (obj->Integer.Value >= acpi_npstates) {
 637                                 device_printf(dev, "Invalid _PPC value\n");
 638                                 AcpiOsFree(obj);
 639                                 return ENXIO;
 640                         }
 641                         sc->pst_sstart = obj->Integer.Value;
 642                         if (bootverbose)
 643                                 device_printf(dev, "_PPC %d\n", sc->pst_sstart);
 644
 645                         /* TODO: Install notifiy handler */
 646                 } else {
 647                         device_printf(dev, "Invalid _PPC object\n");
 648                         AcpiOsFree(obj);
 649                         return ENXIO;
 650                 }
 651
 652                 /* Free _PPC */
 653                 AcpiOsFree(obj);
 654         }
 655
 656         sc->pst_state = sc->pst_sstart;
 657
 658         /*
 659          * Some CPUs only have package P-states, but some BIOSes put each
 660          * hyperthread to its own P-state domain; allow user to override.
 661          */
 662         if (LIST_EMPTY(&dom->pd_pstlist) && acpi_pst_force_pkg_domain) {
 663                 cpumask_t mask;
 664
 665                 mask = get_cpumask_from_level(sc->pst_cpuid, CHIP_LEVEL);
 666                 if (CPUMASK_TESTNZERO(mask)) {
 667                         struct acpi_pst_softc *pst = NULL;
 668                         struct acpi_pst_domain *dom1;
 669
 670                         LIST_FOREACH(dom1, &acpi_pst_domains, pd_link) {
 671                                 LIST_FOREACH(pst, &dom1->pd_pstlist,
 672                                     pst_link) {
 673                                         if (CPUMASK_TESTBIT(mask,
 674                                             pst->pst_cpuid))
 675                                                 break;
 676                                 }
 677                                 if (pst != NULL)
 678                                         break;
 679                         }
 680                         if (pst != NULL &&
 681                             memcmp(&pst->pst_creg, &sc->pst_creg,
 682                                 sizeof(sc->pst_creg)) == 0 &&
 683                             memcmp(&pst->pst_sreg, &sc->pst_sreg,
 684                                 sizeof(sc->pst_sreg)) == 0) {
 685                                 /*
 686                                  * Use the same domain for CPUs in the
 687                                  * same package.
 688                                  */
 689                                 device_printf(dev, "Destroy domain%u, "
 690                                     "force pkg domain%u\n",
 691                                     dom->pd_dom, dom1->pd_dom);
 692                                 LIST_REMOVE(dom, pd_link);
 693                                 kfree(dom, M_DEVBUF);
 694                                 dom = dom1;
 695                                 /*
 696                                  * Make sure that adding us will not
 697                                  * overflow the domain containing
 698                                  * siblings in the same package.
 699                                  */
 700                                 acpi_pst_domain_check_nproc(dev, dom);
 701                         }
 702                 }
 703         }
 704
 705         /* Link us with the domain */
 706         sc->pst_domain = dom;
 707         LIST_INSERT_HEAD(&dom->pd_pstlist, sc, pst_link);
 708
 709         if (device_get_unit(dev) == 0)
 710                 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_pst_postattach, NULL);
 711
 712         return 0;
 713 }
 714
 715 static struct acpi_pst_domain *
 716 acpi_pst_domain_create_pkg(device_t dev, ACPI_OBJECT *obj)
 717 {
 718         struct acpi_pst_domain *dom;
 719         uint32_t val, domain, coord, nproc;
 720
 721         if (!ACPI_PKG_VALID_EQ(obj, 5)) {
 722                 device_printf(dev, "Invalid _PSD package\n");
 723                 return NULL;
 724         }
 725
 726         /* NumberOfEntries */
 727         if (acpi_PkgInt32(obj, 0, &val) != 0 || val != 5) {
 728                 device_printf(dev, "Invalid _PSD NumberOfEntries\n");
 729                 return NULL;
 730         }
 731
 732         /* Revision */
 733         if (acpi_PkgInt32(obj, 1, &val) != 0 || val != 0) {
 734                 device_printf(dev, "Invalid _PSD Revision\n");
 735                 return NULL;
 736         }
 737
 738         if (acpi_PkgInt32(obj, 2, &domain) != 0 ||
 739             acpi_PkgInt32(obj, 3, &coord) != 0 ||
 740             acpi_PkgInt32(obj, 4, &nproc) != 0) {
 741                 device_printf(dev, "Can't extract _PSD package\n");
 742                 return NULL;
 743         }
 744
 745         if (!ACPI_PSD_COORD_VALID(coord)) {
 746                 device_printf(dev, "Invalid _PSD CoordType (%#x)\n", coord);
 747                 return NULL;
 748         }
 749
 750         if (nproc > MAXCPU) {
 751                 /*
 752                  * If NumProcessors is greater than MAXCPU
 753                  * and domain's coordination is SWALL, then
 754                  * we will never be able to start all CPUs
 755                  * within this domain, and power state
 756                  * transition will never be completed, so we
 757                  * just bail out here.
 758                  */
 759                 if (coord == ACPI_PSD_COORD_SWALL) {
 760                         device_printf(dev, "Unsupported _PSD NumProcessors "
 761                                       "(%d)\n", nproc);
 762                         return NULL;
 763                 }
 764         } else if (nproc == 0) {
 765                 device_printf(dev, "_PSD NumProcessors are zero\n");
 766                 return NULL;
 767         }
 768
 769         dom = acpi_pst_domain_find(domain);
 770         if (dom != NULL) {
 771                 if (dom->pd_flags & ACPI_PSTDOM_FLAG_INT) {
 772                         device_printf(dev, "Mixed Integer _PSD and "
 773                             "Package _PSD\n");
 774                         return NULL;
 775                 }
 776                 if (dom->pd_coord != coord) {
 777                         device_printf(dev, "Inconsistent _PSD coord "
 778                             "information cross Processor objects\n");
 779                         return NULL;
 780                 }
 781                 if (dom->pd_nproc != nproc) {
 782                         device_printf(dev, "Inconsistent _PSD nproc "
 783                             "information cross Processor objects\n");
 784                         /*
 785                          * Some stupid BIOSes will set wrong "# of processors",
 786                          * e.g. 1 for CPU w/ hyperthreading; Be lenient here.
 787                          */
 788                 }
 789                 return dom;
 790         }
 791
 792         dom = acpi_pst_domain_alloc(domain, coord, nproc);
 793         if (bootverbose) {
 794                 device_printf(dev, "create pkg domain%u, coord %#x\n",
 795                     dom->pd_dom, dom->pd_coord);
 796         }
 797
 798         return dom;
 799 }
 800
 801 static struct acpi_pst_domain *
 802 acpi_pst_domain_create_int(device_t dev, uint32_t domain)
 803 {
 804         struct acpi_pst_domain *dom;
 805
 806         dom = acpi_pst_domain_find(domain);
 807         if (dom != NULL) {
 808                 if ((dom->pd_flags & ACPI_PSTDOM_FLAG_INT) == 0) {
 809                         device_printf(dev, "Mixed Package _PSD and "
 810                             "Integer _PSD\n");
 811                         return NULL;
 812                 }
 813                 KKASSERT(dom->pd_coord == ACPI_PSD_COORD_SWALL);
 814
 815                 dom->pd_nproc++;
 816                 return dom;
 817         }
 818
 819         dom = acpi_pst_domain_alloc(domain, ACPI_PSD_COORD_SWALL, 1);
 820         dom->pd_flags |= ACPI_PSTDOM_FLAG_INT;
 821
 822         if (bootverbose)
 823                 device_printf(dev, "create int domain%u\n", dom->pd_dom);
 824
 825         return dom;
 826 }
 827
 828 static struct acpi_pst_domain *
 829 acpi_pst_domain_find(uint32_t domain)
 830 {
 831         struct acpi_pst_domain *dom;
 832
 833         LIST_FOREACH(dom, &acpi_pst_domains, pd_link) {
 834                 if (dom->pd_flags & ACPI_PSTDOM_FLAG_STUB)
 835                         continue;
 836                 if (dom->pd_dom == domain)
 837                         return dom;
 838         }
 839         return NULL;
 840 }
 841
 842 static struct acpi_pst_domain *
 843 acpi_pst_domain_alloc(uint32_t domain, uint32_t coord, uint32_t nproc)
 844 {
 845         struct acpi_pst_domain *dom;
 846
 847         dom = kmalloc(sizeof(*dom), M_DEVBUF, M_WAITOK | M_ZERO);
 848         dom->pd_dom = domain;
 849         dom->pd_coord = coord;
 850         dom->pd_nproc = nproc;
 851         dom->pd_state = 0; /* XXX */
 852         dom->pd_sstart = 0; /* XXX */
 853         LIST_INIT(&dom->pd_pstlist);
 854
 855         LIST_INSERT_HEAD(&acpi_pst_domains, dom, pd_link);
 856
 857         return dom;
 858 }
 859
 860 static int
 861 acpi_pst_domain_set_pstate(struct acpi_pst_domain *dom, int i)
 862 {
 863         const struct acpi_pstate *pstate;
 864         struct acpi_pst_softc *sc;
 865         int done, error;
 866
 867         KKASSERT(i >= 0 && i < acpi_npstates);
 868         pstate = &acpi_pstates[i];
 869
 870         done = 0;
 871         LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 872                 if (!done) {
 873                         error = acpi_pst_set_pstate(sc, pstate);
 874                         if (error) {
 875                                 device_printf(sc->pst_dev, "can't set "
 876                                               "freq %d\n", pstate->st_freq);
 877                                 /* XXX error cleanup? */
 878                         }
 879                         if (dom->pd_coord == ACPI_PSD_COORD_SWANY)
 880                                 done = 1;
 881                 }
 882                 sc->pst_state = i;
 883         }
 884         dom->pd_state = i;
 885
 886         return 0;
 887 }
 888
 889 static int
 890 acpi_pst_global_set_pstate(int i)
 891 {
 892         struct acpi_pst_domain *dom;
 893
 894         LIST_FOREACH(dom, &acpi_pst_domains, pd_link) {
 895                 /* Skip dead domain */
 896                 if (dom->pd_flags & ACPI_PSTDOM_FLAG_DEAD)
 897                         continue;
 898                 acpi_pst_domain_set_pstate(dom, i);
 899         }
 900         acpi_pst_global_state = i;
 901
 902         return 0;
 903 }
 904
 905 static void
 906 acpi_pst_postattach(void *arg __unused)
 907 {
 908         struct acpi_pst_domain *dom;
 909         struct acpi_cpu_softc *cpu;
 910         device_t *devices;
 911         int i, ndevices, error, has_domain, sstate;
 912
 913         devices = NULL;
 914         ndevices = 0;
 915         error = devclass_get_devices(acpi_pst_devclass, &devices, &ndevices);
 916         if (error)
 917                 return;
 918
 919         if (ndevices == 0)
 920                 return;
 921
 922         cpu = NULL;
 923         for (i = 0; i < ndevices; ++i) {
 924                 cpu = device_get_softc(device_get_parent(devices[i]));
 925                 if (cpu->glob_sysctl_tree != NULL)
 926                         break;
 927         }
 928         kfree(devices, M_TEMP);
 929         KKASSERT(cpu != NULL);
 930
 931         if (acpi_pst_md == NULL)
 932                 kprintf("ACPI: no P-State CPU driver\n");
 933
 934         sstate = 0x7fffffff;
 935         has_domain = 0;
 936         LIST_FOREACH(dom, &acpi_pst_domains, pd_link) {
 937                 struct acpi_pst_softc *sc;
 938                 char buf[32];
 939
 940                 /*
 941                  * Make sure that all processors belonging to this
 942                  * domain are located.
 943                  */
 944                 i = 0;
 945                 LIST_FOREACH(sc, &dom->pd_pstlist, pst_link)
 946                         ++i;
 947                 if (i != dom->pd_nproc) {
 948                         KKASSERT(i < dom->pd_nproc);
 949
 950                         kprintf("ACPI: domain%u misses processors, "
 951                                 "should be %d, got %d\n", dom->pd_dom,
 952                                 dom->pd_nproc, i);
 953                         if (dom->pd_coord == ACPI_PSD_COORD_SWALL) {
 954                                 /*
 955                                  * If this domain's coordination is
 956                                  * SWALL and we don't see all of the
 957                                  * member CPUs of this domain, then
 958                                  * the P-State transition will never
 959                                  * be completed, so just leave this
 960                                  * domain out.
 961                                  */
 962                                 dom->pd_flags |= ACPI_PSTDOM_FLAG_DEAD;
 963                                 continue;
 964                         }
 965                         dom->pd_nproc = i;
 966                 }
 967
 968                 /*
 969                  * Validate P-State configurations for this domain
 970                  */
 971                 LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 972                         error = acpi_pst_check_csr(sc);
 973                         if (error)
 974                                 break;
 975
 976                         error = acpi_pst_check_pstates(sc);
 977                         if (error)
 978                                 break;
 979                 }
 980                 if (sc != NULL) {
 981                         kprintf("ACPI: domain%u P-State configuration "
 982                                 "check failed\n", dom->pd_dom);
 983                         dom->pd_flags |= ACPI_PSTDOM_FLAG_DEAD;
 984                         continue;
 985                 }
 986
 987                 /*
 988                  * Do necssary P-State initialization
 989                  */
 990                 LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 991                         error = acpi_pst_init(sc);
 992                         if (error)
 993                                 break;
 994                 }
 995                 if (sc != NULL) {
 996                         kprintf("ACPI: domain%u P-State initialization "
 997                                 "check failed\n", dom->pd_dom);
 998                         dom->pd_flags |= ACPI_PSTDOM_FLAG_DEAD;
 999                         continue;
1000                 }
1001
1002                 has_domain = 1;
1003
1004                 ksnprintf(buf, sizeof(buf), "px_dom%u", dom->pd_dom);
1005
1006                 sysctl_ctx_init(&dom->pd_sysctl_ctx);
1007                 dom->pd_sysctl_tree =
1008                 SYSCTL_ADD_NODE(&dom->pd_sysctl_ctx,
1009                         SYSCTL_CHILDREN(cpu->glob_sysctl_tree),
1010                         OID_AUTO, buf, CTLFLAG_RD, 0,
1011                         "P-State domain");
1012                 if (dom->pd_sysctl_tree == NULL) {
1013                         kprintf("ACPI: Can't create sysctl tree for domain%u",
1014                                 dom->pd_dom);
1015                         continue;
1016                 }
1017
1018                 SYSCTL_ADD_PROC(&dom->pd_sysctl_ctx,
1019                                 SYSCTL_CHILDREN(dom->pd_sysctl_tree),
1020                                 OID_AUTO, "available",
1021                                 CTLTYPE_STRING | CTLFLAG_RD,
1022                                 dom, 0, acpi_pst_sysctl_freqs, "A",
1023                                 "available frequencies");
1024
1025                 SYSCTL_ADD_PROC(&dom->pd_sysctl_ctx,
1026                                 SYSCTL_CHILDREN(dom->pd_sysctl_tree),
1027                                 OID_AUTO, "available_bin",
1028                                 CTLTYPE_OPAQUE | CTLFLAG_RD,
1029                                 dom, 0, acpi_pst_sysctl_freqs_bin, "IU",
1030                                 "available frequencies (binary format)");
1031
1032                 SYSCTL_ADD_PROC(&dom->pd_sysctl_ctx,
1033                                 SYSCTL_CHILDREN(dom->pd_sysctl_tree),
1034                                 OID_AUTO, "members",
1035                                 CTLTYPE_STRING | CTLFLAG_RD,
1036                                 dom, 0, acpi_pst_sysctl_members, "A",
1037                                 "member cpus");
1038
1039                 if (acpi_pst_md != NULL &&
1040                     acpi_pst_md->pmd_set_pstate != NULL) {
1041                         SYSCTL_ADD_PROC(&dom->pd_sysctl_ctx,
1042                                         SYSCTL_CHILDREN(dom->pd_sysctl_tree),
1043                                         OID_AUTO, "select",
1044                                         CTLTYPE_UINT | CTLFLAG_RW,
1045                                         dom, 0, acpi_pst_sysctl_select,
1046                                         "IU", "select freq");
1047                 }
1048
1049                 if (dom->pd_state < sstate)
1050                         sstate = dom->pd_state;
1051         }
1052
1053         if (has_domain && acpi_pst_md != NULL &&
1054             acpi_pst_md->pmd_set_pstate != NULL) {
1055                 SYSCTL_ADD_PROC(&cpu->glob_sysctl_ctx,
1056                                 SYSCTL_CHILDREN(cpu->glob_sysctl_tree),
1057                                 OID_AUTO, "px_global",
1058                                 CTLTYPE_UINT | CTLFLAG_RW,
1059                                 NULL, 0, acpi_pst_sysctl_global,
1060                                 "IU", "select freq for all domains");
1061
1062                 acpi_pst_global_set_pstate(sstate);
1063         }
1064 }
1065
1066 static int
1067 acpi_pst_sysctl_freqs(SYSCTL_HANDLER_ARGS)
1068 {
1069         struct acpi_pst_domain *dom = arg1;
1070         int i, error;
1071
1072         error = 0;
1073         for (i = 0; i < acpi_npstates; ++i) {
1074                 if (error == 0 && i)
1075                         error = SYSCTL_OUT(req, " ", 1);
1076                 if (error == 0) {
1077                         const char *pat;
1078                         char buf[32];
1079
1080                         if (i < dom->pd_sstart)
1081                                 pat = "(%u)";
1082                         else
1083                                 pat = "%u";
1084
1085                         ksnprintf(buf, sizeof(buf), pat,
1086                                   acpi_pstates[i].st_freq);
1087                         error = SYSCTL_OUT(req, buf, strlen(buf));
1088                 }
1089         }
1090         return error;
1091 }
1092
1093 static int
1094 acpi_pst_sysctl_freqs_bin(SYSCTL_HANDLER_ARGS)
1095 {
1096         struct acpi_pst_domain *dom = arg1;
1097         uint32_t freqs[ACPI_NPSTATE_MAX];
1098         int cnt, i;
1099
1100         cnt = acpi_npstates - dom->pd_sstart;
1101         for (i = 0; i < cnt; ++i)
1102                 freqs[i] = acpi_pstates[dom->pd_sstart + i].st_freq;
1103
1104         return sysctl_handle_opaque(oidp, freqs, cnt * sizeof(freqs[0]), req);
1105 }
1106
1107 static int
1108 acpi_pst_sysctl_members(SYSCTL_HANDLER_ARGS)
1109 {
1110         struct acpi_pst_domain *dom = arg1;
1111         struct acpi_pst_softc *sc;
1112         int loop, error;
1113
1114         loop = error = 0;
1115         LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
1116                 char buf[32];
1117
1118                 if (error == 0 && loop)
1119                         error = SYSCTL_OUT(req, " ", 1);
1120                 if (error == 0) {
1121                         ksnprintf(buf, sizeof(buf), "cpu%d", sc->pst_cpuid);
1122                         error = SYSCTL_OUT(req, buf, strlen(buf));
1123                 }
1124
1125                 if (error == 0 && acpi_pst_md && acpi_pst_md->pmd_get_pstate) {
1126                         const struct acpi_pstate *pstate;
1127                         const char *str;
1128
1129                         pstate = acpi_pst_get_pstate(sc);
1130                         if (pstate == NULL) {
1131                                 str = "(*)";
1132                         } else {
1133                                 ksnprintf(buf, sizeof(buf), "(%d)",
1134                                           pstate->st_freq);
1135                                 str = buf;
1136                         }
1137                         error = SYSCTL_OUT(req, str, strlen(str));
1138                 }
1139                 ++loop;
1140         }
1141         return error;
1142 }
1143
1144 static int
1145 acpi_pst_sysctl_select(SYSCTL_HANDLER_ARGS)
1146 {
1147         struct acpi_pst_domain *dom = arg1;
1148         int error, i, freq;
1149
1150         KKASSERT(dom->pd_state >= 0 && dom->pd_state < acpi_npstates);
1151
1152         freq = acpi_pstates[dom->pd_state].st_freq;
1153
1154         error = sysctl_handle_int(oidp, &freq, 0, req);
1155         if (error || req->newptr == NULL)
1156                 return error;
1157
1158         i = acpi_pst_freq2index(freq);
1159         if (i < 0)
1160                 return EINVAL;
1161
1162         acpi_pst_domain_set_pstate(dom, i);
1163         return 0;
1164 }
1165
1166 static int
1167 acpi_pst_sysctl_global(SYSCTL_HANDLER_ARGS)
1168 {
1169         int error, i, freq;
1170
1171         KKASSERT(acpi_pst_global_state >= 0 &&
1172                  acpi_pst_global_state < acpi_npstates);
1173
1174         freq = acpi_pstates[acpi_pst_global_state].st_freq;
1175
1176         error = sysctl_handle_int(oidp, &freq, 0, req);
1177         if (error || req->newptr == NULL)
1178                 return error;
1179
1180         i = acpi_pst_freq2index(freq);
1181         if (i < 0)
1182                 return EINVAL;
1183
1184         acpi_pst_global_set_pstate(i);
1185
1186         return 0;
1187 }
1188
1189 static void
1190 acpi_pst_check_csr_handler(netmsg_t msg)
1191 {
1192         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1193         int error;
1194
1195         error = acpi_pst_md->pmd_check_csr(rmsg->ctrl, rmsg->status);
1196         lwkt_replymsg(&rmsg->base.lmsg, error);
1197 }
1198
1199 static int
1200 acpi_pst_check_csr(struct acpi_pst_softc *sc)
1201 {
1202         struct netmsg_acpi_pst msg;
1203
1204         if (acpi_pst_md == NULL)
1205                 return 0;
1206
1207         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1208                     MSGF_PRIORITY, acpi_pst_check_csr_handler);
1209         msg.ctrl = &sc->pst_creg;
1210         msg.status = &sc->pst_sreg;
1211
1212         return lwkt_domsg(netisr_cpuport(sc->pst_cpuid), &msg.base.lmsg, 0);
1213 }
1214
1215 static void
1216 acpi_pst_check_pstates_handler(netmsg_t msg)
1217 {
1218         int error;
1219
1220         error = acpi_pst_md->pmd_check_pstates(acpi_pstates, acpi_npstates);
1221         lwkt_replymsg(&msg->lmsg, error);
1222 }
1223
1224 static int
1225 acpi_pst_check_pstates(struct acpi_pst_softc *sc)
1226 {
1227         struct netmsg_base msg;
1228
1229         if (acpi_pst_md == NULL)
1230                 return 0;
1231
1232         netmsg_init(&msg, NULL, &curthread->td_msgport,
1233                     MSGF_PRIORITY, acpi_pst_check_pstates_handler);
1234
1235         return lwkt_domsg(netisr_cpuport(sc->pst_cpuid), &msg.lmsg, 0);
1236 }
1237
1238 static void
1239 acpi_pst_init_handler(netmsg_t msg)
1240 {
1241         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1242         int error;
1243
1244         error = acpi_pst_md->pmd_init(rmsg->ctrl, rmsg->status);
1245         lwkt_replymsg(&rmsg->base.lmsg, error);
1246 }
1247
1248 static int
1249 acpi_pst_init(struct acpi_pst_softc *sc)
1250 {
1251         struct netmsg_acpi_pst msg;
1252
1253         if (acpi_pst_md == NULL)
1254                 return 0;
1255
1256         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1257                     MSGF_PRIORITY, acpi_pst_init_handler);
1258         msg.ctrl = &sc->pst_creg;
1259         msg.status = &sc->pst_sreg;
1260
1261         return lwkt_domsg(netisr_cpuport(sc->pst_cpuid), &msg.base.lmsg, 0);
1262 }
1263
1264 static void
1265 acpi_pst_set_pstate_handler(netmsg_t msg)
1266 {
1267         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1268         int error;
1269
1270         error = acpi_pst_md->pmd_set_pstate(rmsg->ctrl, rmsg->status,
1271                                             rmsg->base.lmsg.u.ms_resultp);
1272         lwkt_replymsg(&rmsg->base.lmsg, error);
1273 }
1274
1275 static int
1276 acpi_pst_set_pstate(struct acpi_pst_softc *sc, const struct acpi_pstate *pstate)
1277 {
1278         struct netmsg_acpi_pst msg;
1279
1280         KKASSERT(acpi_pst_md != NULL);
1281
1282         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1283                     MSGF_PRIORITY, acpi_pst_set_pstate_handler);
1284         msg.base.lmsg.u.ms_resultp = __DECONST(void *, pstate);
1285         msg.ctrl = &sc->pst_creg;
1286         msg.status = &sc->pst_sreg;
1287
1288         return lwkt_domsg(netisr_cpuport(sc->pst_cpuid), &msg.base.lmsg, 0);
1289 }
1290
1291 static void
1292 acpi_pst_get_pstate_handler(netmsg_t msg)
1293 {
1294         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1295         const struct acpi_pstate *pstate;
1296
1297         pstate = acpi_pst_md->pmd_get_pstate(rmsg->status, acpi_pstates,
1298                                              acpi_npstates);
1299         rmsg->base.lmsg.u.ms_resultp = __DECONST(void *, pstate);
1300         lwkt_replymsg(&rmsg->base.lmsg, 0);
1301 }
1302
1303 static const struct acpi_pstate *
1304 acpi_pst_get_pstate(struct acpi_pst_softc *sc)
1305 {
1306         struct netmsg_acpi_pst msg;
1307
1308         if (acpi_pst_md == NULL)
1309                 return 0;
1310
1311         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1312                     MSGF_PRIORITY, acpi_pst_get_pstate_handler);
1313         msg.status = &sc->pst_sreg;
1314
1315         lwkt_domsg(netisr_cpuport(sc->pst_cpuid), &msg.base.lmsg, 0);
1316         return msg.base.lmsg.u.ms_resultp;
1317 }
1318
1319 static int
1320 acpi_pst_alloc_resource(device_t dev, ACPI_OBJECT *obj, int idx,
1321                         struct acpi_pst_res *res)
1322 {
1323         struct acpi_pst_softc *sc = device_get_softc(dev);
1324         int error, type;
1325
1326         /* Save GAS */
1327         error = acpi_PkgRawGas(obj, idx, &res->pr_gas);
1328         if (error)
1329                 return error;
1330
1331         /* Allocate resource, if possible */
1332         res->pr_rid = sc->pst_parent->cpu_next_rid;
1333         acpi_bus_alloc_gas(dev, &type, &res->pr_rid, &res->pr_gas, &res->pr_res, 0);
1334         if (res->pr_res != NULL) {
1335                 sc->pst_parent->cpu_next_rid++;
1336                 res->pr_bt = rman_get_bustag(res->pr_res);
1337                 res->pr_bh = rman_get_bushandle(res->pr_res);
1338         } else {
1339                 res->pr_rid = 0;
1340         }
1341         return 0;
1342 }
1343
1344 static void
1345 acpi_pst_domain_check_nproc(device_t dev, struct acpi_pst_domain *dom)
1346 {
1347         struct acpi_pst_softc *pst;
1348         int i;
1349
1350         i = 0;
1351         LIST_FOREACH(pst, &dom->pd_pstlist, pst_link)
1352                 ++i;
1353         if (i == dom->pd_nproc) {
1354                 /*
1355                  * Some stupid BIOSes will set wrong "# of processors",
1356                  * e.g. 1 for CPU w/ hyperthreading; Be lenient here.
1357                  */
1358                 if (bootverbose) {
1359                         device_printf(dev, "domain%u already contains %d "
1360                             "P-States\n", dom->pd_dom, dom->pd_nproc);
1361                 }
1362                 dom->pd_nproc++;
1363         }
1364         KKASSERT(i < dom->pd_nproc);
1365 }