sys/dev/acpica5/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
  46 #include <net/netisr.h>
  47 #include <net/netmsg2.h>
  48 #include <net/if_var.h>
  49
  50 #include "acpi.h"
  51 #include "acpivar.h"
  52 #include "acpi_cpu.h"
  53 #include "acpi_cpu_pstate.h"
  54
  55 #define ACPI_NPSTATE_MAX        16
  56
  57 #define ACPI_PSS_PX_NENTRY      6
  58
  59 #define ACPI_PSD_COORD_SWALL    0xfc
  60 #define ACPI_PSD_COORD_SWANY    0xfd
  61 #define ACPI_PSD_COORD_HWALL    0xfe
  62 #define ACPI_PSD_COORD_VALID(coord) \
  63         ((coord) == ACPI_PSD_COORD_SWALL || \
  64          (coord) == ACPI_PSD_COORD_SWANY || \
  65          (coord) == ACPI_PSD_COORD_HWALL)
  66
  67 struct acpi_pst_softc;
  68 LIST_HEAD(acpi_pst_list, acpi_pst_softc);
  69
  70 struct netmsg_acpi_pst {
  71         struct netmsg_base base;
  72         const struct acpi_pst_res *ctrl;
  73         const struct acpi_pst_res *status;
  74 };
  75
  76 struct acpi_pst_domain {
  77         uint32_t                pd_dom;
  78         uint32_t                pd_coord;
  79         uint32_t                pd_nproc;
  80         LIST_ENTRY(acpi_pst_domain) pd_link;
  81
  82         uint32_t                pd_flags;
  83
  84         int                     pd_state;
  85         int                     pd_sstart;
  86         struct acpi_pst_list    pd_pstlist;
  87
  88         struct sysctl_ctx_list  pd_sysctl_ctx;
  89         struct sysctl_oid       *pd_sysctl_tree;
  90 };
  91 LIST_HEAD(acpi_pst_domlist, acpi_pst_domain);
  92
  93 #define ACPI_PSTDOM_FLAG_STUB   0x1     /* stub domain, no _PSD */
  94 #define ACPI_PSTDOM_FLAG_DEAD   0x2     /* domain can't be started */
  95 #define ACPI_PSTDOM_FLAG_INT    0x4     /* domain created from Integer _PSD */
  96
  97 struct acpi_pst_softc {
  98         device_t                pst_dev;
  99         struct acpi_cpux_softc  *pst_parent;
 100         struct acpi_pst_domain  *pst_domain;
 101         struct acpi_pst_res     pst_creg;
 102         struct acpi_pst_res     pst_sreg;
 103
 104         int                     pst_state;
 105         int                     pst_sstart;
 106         int                     pst_cpuid;
 107
 108         ACPI_HANDLE             pst_handle;
 109
 110         LIST_ENTRY(acpi_pst_softc) pst_link;
 111 };
 112
 113 static int      acpi_pst_probe(device_t dev);
 114 static int      acpi_pst_attach(device_t dev);
 115
 116 static void     acpi_pst_postattach(void *);
 117 static struct acpi_pst_domain *
 118                 acpi_pst_domain_create_int(device_t, uint32_t);
 119 static struct acpi_pst_domain *
 120                 acpi_pst_domain_create_pkg(device_t, ACPI_OBJECT *);
 121 static struct acpi_pst_domain *
 122                 acpi_pst_domain_find(uint32_t);
 123 static struct acpi_pst_domain *
 124                 acpi_pst_domain_alloc(uint32_t, uint32_t, uint32_t);
 125 static int      acpi_pst_domain_set_pstate(struct acpi_pst_domain *, int);
 126 static int      acpi_pst_global_set_pstate(int);
 127
 128 static int      acpi_pst_check_csr(struct acpi_pst_softc *);
 129 static int      acpi_pst_check_pstates(struct acpi_pst_softc *);
 130 static int      acpi_pst_init(struct acpi_pst_softc *);
 131 static int      acpi_pst_set_pstate(struct acpi_pst_softc *,
 132                     const struct acpi_pstate *);
 133 static const struct acpi_pstate *
 134                 acpi_pst_get_pstate(struct acpi_pst_softc *);
 135 static int      acpi_pst_alloc_resource(device_t, ACPI_OBJECT *, int,
 136                     struct acpi_pst_res *);
 137
 138 static void     acpi_pst_check_csr_handler(netmsg_t);
 139 static void     acpi_pst_check_pstates_handler(netmsg_t);
 140 static void     acpi_pst_init_handler(netmsg_t);
 141 static void     acpi_pst_set_pstate_handler(netmsg_t);
 142 static void     acpi_pst_get_pstate_handler(netmsg_t);
 143
 144 static int      acpi_pst_sysctl_freqs(SYSCTL_HANDLER_ARGS);
 145 static int      acpi_pst_sysctl_members(SYSCTL_HANDLER_ARGS);
 146 static int      acpi_pst_sysctl_select(SYSCTL_HANDLER_ARGS);
 147 static int      acpi_pst_sysctl_global(SYSCTL_HANDLER_ARGS);
 148
 149 static struct acpi_pst_domlist  acpi_pst_domains =
 150         LIST_HEAD_INITIALIZER(acpi_pst_domains);
 151 static int                      acpi_pst_domain_id;
 152
 153 static int                      acpi_pst_global_state;
 154
 155 static int                      acpi_npstates;
 156 static struct acpi_pstate       *acpi_pstates;
 157
 158 static const struct acpi_pst_md *acpi_pst_md;
 159
 160 static device_method_t acpi_pst_methods[] = {
 161         /* Device interface */
 162         DEVMETHOD(device_probe,                 acpi_pst_probe),
 163         DEVMETHOD(device_attach,                acpi_pst_attach),
 164         DEVMETHOD(device_detach,                bus_generic_detach),
 165         DEVMETHOD(device_shutdown,              bus_generic_shutdown),
 166         DEVMETHOD(device_suspend,               bus_generic_suspend),
 167         DEVMETHOD(device_resume,                bus_generic_resume),
 168
 169         /* Bus interface */
 170         DEVMETHOD(bus_add_child,                bus_generic_add_child),
 171         DEVMETHOD(bus_print_child,              bus_generic_print_child),
 172         DEVMETHOD(bus_read_ivar,                bus_generic_read_ivar),
 173         DEVMETHOD(bus_write_ivar,               bus_generic_write_ivar),
 174         DEVMETHOD(bus_get_resource_list,        bus_generic_get_resource_list),
 175         DEVMETHOD(bus_set_resource,             bus_generic_rl_set_resource),
 176         DEVMETHOD(bus_get_resource,             bus_generic_rl_get_resource),
 177         DEVMETHOD(bus_alloc_resource,           bus_generic_alloc_resource),
 178         DEVMETHOD(bus_release_resource,         bus_generic_release_resource),
 179         DEVMETHOD(bus_driver_added,             bus_generic_driver_added),
 180         DEVMETHOD(bus_activate_resource,        bus_generic_activate_resource),
 181         DEVMETHOD(bus_deactivate_resource,      bus_generic_deactivate_resource),
 182         DEVMETHOD(bus_setup_intr,               bus_generic_setup_intr),
 183         DEVMETHOD(bus_teardown_intr,            bus_generic_teardown_intr),
 184
 185         { 0, 0 }
 186 };
 187
 188 static driver_t acpi_pst_driver = {
 189         "cpu_pst",
 190         acpi_pst_methods,
 191         sizeof(struct acpi_pst_softc)
 192 };
 193
 194 static devclass_t acpi_pst_devclass;
 195 DRIVER_MODULE(cpu_pst, cpu, acpi_pst_driver, acpi_pst_devclass, 0, 0);
 196 MODULE_DEPEND(cpu_pst, acpi, 1, 1, 1);
 197
 198 static __inline int
 199 acpi_pst_freq2index(int freq)
 200 {
 201         int i;
 202
 203         for (i = 0; i < acpi_npstates; ++i) {
 204                 if (acpi_pstates[i].st_freq == freq)
 205                         return i;
 206         }
 207         return -1;
 208 }
 209
 210 static int
 211 acpi_pst_probe(device_t dev)
 212 {
 213         ACPI_BUFFER buf;
 214         ACPI_HANDLE handle;
 215         ACPI_STATUS status;
 216         ACPI_OBJECT *obj;
 217
 218         if (acpi_disabled("cpu_pst") ||
 219             acpi_get_type(dev) != ACPI_TYPE_PROCESSOR)
 220                 return ENXIO;
 221
 222         if (acpi_pst_md == NULL)
 223                 acpi_pst_md = acpi_pst_md_probe();
 224
 225         handle = acpi_get_handle(dev);
 226
 227         /*
 228          * Check _PCT package
 229          */
 230         buf.Pointer = NULL;
 231         buf.Length = ACPI_ALLOCATE_BUFFER;
 232         status = AcpiEvaluateObject(handle, "_PCT", NULL, &buf);
 233         if (ACPI_FAILURE(status)) {
 234                 if (bootverbose) {
 235                         device_printf(dev, "Can't get _PCT package - %s\n",
 236                                       AcpiFormatException(status));
 237                 }
 238                 return ENXIO;
 239         }
 240
 241         obj = (ACPI_OBJECT *)buf.Pointer;
 242         if (!ACPI_PKG_VALID_EQ(obj, 2)) {
 243                 device_printf(dev, "Invalid _PCT package\n");
 244                 AcpiOsFree(obj);
 245                 return ENXIO;
 246         }
 247         AcpiOsFree(obj);
 248
 249         /*
 250          * Check _PSS package
 251          */
 252         buf.Pointer = NULL;
 253         buf.Length = ACPI_ALLOCATE_BUFFER;
 254         status = AcpiEvaluateObject(handle, "_PSS", NULL, &buf);
 255         if (ACPI_FAILURE(status)) {
 256                 device_printf(dev, "Can't get _PSS package - %s\n",
 257                               AcpiFormatException(status));
 258                 return ENXIO;
 259         }
 260
 261         obj = (ACPI_OBJECT *)buf.Pointer;
 262         if (!ACPI_PKG_VALID(obj, 1)) {
 263                 device_printf(dev, "Invalid _PSS package\n");
 264                 AcpiOsFree(obj);
 265                 return ENXIO;
 266         }
 267         AcpiOsFree(obj);
 268
 269         device_set_desc(dev, "ACPI CPU P-State");
 270         return 0;
 271 }
 272
 273 static int
 274 acpi_pst_attach(device_t dev)
 275 {
 276         struct acpi_pst_softc *sc = device_get_softc(dev), *pst;
 277         struct acpi_pst_domain *dom = NULL;
 278         ACPI_BUFFER buf;
 279         ACPI_STATUS status;
 280         ACPI_OBJECT *obj;
 281         struct acpi_pstate *pstate, *p;
 282         int i, npstate, error;
 283
 284         sc->pst_dev = dev;
 285         sc->pst_parent = device_get_softc(device_get_parent(dev));
 286         sc->pst_handle = acpi_get_handle(dev);
 287         sc->pst_cpuid = acpi_get_magic(dev);
 288
 289         /*
 290          * If there is a _PSD, then we create procossor domain
 291          * accordingly.  If there is no _PSD, we just fake a
 292          * default processor domain0.
 293          */
 294         buf.Pointer = NULL;
 295         buf.Length = ACPI_ALLOCATE_BUFFER;
 296         status = AcpiEvaluateObject(sc->pst_handle, "_PSD", NULL, &buf);
 297         if (!ACPI_FAILURE(status)) {
 298                 obj = (ACPI_OBJECT *)buf.Pointer;
 299                 if (ACPI_PKG_VALID_EQ(obj, 1)) {
 300                         dom = acpi_pst_domain_create_pkg(dev,
 301                                 &obj->Package.Elements[0]);
 302                         if (dom == NULL) {
 303                                 AcpiOsFree(obj);
 304                                 return ENXIO;
 305                         }
 306                 } else {
 307                         if (obj->Type != ACPI_TYPE_INTEGER) {
 308                                 device_printf(dev,
 309                                     "Invalid _PSD package, Type 0x%x\n",
 310                                     obj->Type);
 311                                 AcpiOsFree(obj);
 312                                 return ENXIO;
 313                         } else {
 314                                 device_printf(dev, "Integer _PSD %ju\n",
 315                                     (uintmax_t)obj->Integer.Value);
 316                                 dom = acpi_pst_domain_create_int(dev,
 317                                     obj->Integer.Value);
 318                                 if (dom == NULL) {
 319                                         AcpiOsFree(obj);
 320                                         return ENXIO;
 321                                 }
 322                         }
 323                 }
 324
 325                 /* Free _PSD */
 326                 AcpiOsFree(buf.Pointer);
 327         } else {
 328                 /*
 329                  * Create a stub one processor domain for each processor
 330                  */
 331                 dom = acpi_pst_domain_alloc(acpi_pst_domain_id,
 332                         ACPI_PSD_COORD_SWANY, 1);
 333                 dom->pd_flags |= ACPI_PSTDOM_FLAG_STUB;
 334
 335                 ++acpi_pst_domain_id;
 336         }
 337
 338         /* Make sure that adding us will not overflow our domain */
 339         i = 0;
 340         LIST_FOREACH(pst, &dom->pd_pstlist, pst_link)
 341                 ++i;
 342         if (i == dom->pd_nproc) {
 343                 device_printf(dev, "Domain%u already contains %d P-States, "
 344                               "invalid _PSD package\n",
 345                               dom->pd_dom, dom->pd_nproc);
 346                 return ENXIO;
 347         }
 348         KKASSERT(i < dom->pd_nproc);
 349
 350         /*
 351          * Get control/status registers from _PCT
 352          */
 353         buf.Pointer = NULL;
 354         buf.Length = ACPI_ALLOCATE_BUFFER;
 355         status = AcpiEvaluateObject(sc->pst_handle, "_PCT", NULL, &buf);
 356         if (ACPI_FAILURE(status)) {
 357                 device_printf(dev, "Can't get _PCT package - %s\n",
 358                               AcpiFormatException(status));
 359                 return ENXIO;
 360         }
 361
 362         obj = (ACPI_OBJECT *)buf.Pointer;
 363         if (!ACPI_PKG_VALID_EQ(obj, 2)) {
 364                 device_printf(dev, "Invalid _PCT package\n");
 365                 AcpiOsFree(obj);
 366                 return ENXIO;
 367         }
 368
 369         /* Save and try allocating control register */
 370         error = acpi_pst_alloc_resource(dev, obj, 0, &sc->pst_creg);
 371         if (error) {
 372                 AcpiOsFree(obj);
 373                 return error;
 374         }
 375         if (bootverbose) {
 376                 device_printf(dev, "control reg %d %jx\n",
 377                               sc->pst_creg.pr_gas.SpaceId,
 378                               (uintmax_t)sc->pst_creg.pr_gas.Address);
 379         }
 380
 381         /* Save and try allocating status register */
 382         error = acpi_pst_alloc_resource(dev, obj, 1, &sc->pst_sreg);
 383         if (error) {
 384                 AcpiOsFree(obj);
 385                 return error;
 386         }
 387         if (bootverbose) {
 388                 device_printf(dev, "status reg %d %jx\n",
 389                               sc->pst_sreg.pr_gas.SpaceId,
 390                               (uintmax_t)sc->pst_sreg.pr_gas.Address);
 391         }
 392
 393         /* Free _PCT */
 394         AcpiOsFree(obj);
 395
 396         /*
 397          * Create P-State table according to _PSS
 398          */
 399         buf.Pointer = NULL;
 400         buf.Length = ACPI_ALLOCATE_BUFFER;
 401         status = AcpiEvaluateObject(sc->pst_handle, "_PSS", NULL, &buf);
 402         if (ACPI_FAILURE(status)) {
 403                 device_printf(dev, "Can't get _PSS package - %s\n",
 404                               AcpiFormatException(status));
 405                 return ENXIO;
 406         }
 407
 408         obj = (ACPI_OBJECT *)buf.Pointer;
 409         if (!ACPI_PKG_VALID(obj, 1)) {
 410                 device_printf(dev, "Invalid _PSS package\n");
 411                 AcpiOsFree(obj);
 412                 return ENXIO;
 413         }
 414
 415         /* Don't create too many P-States */
 416         npstate = obj->Package.Count;
 417         if (npstate > ACPI_NPSTATE_MAX) {
 418                 device_printf(dev, "Too many P-States, %d->%d\n",
 419                               npstate, ACPI_NPSTATE_MAX);
 420                 npstate = ACPI_NPSTATE_MAX;
 421         }
 422
 423         /*
 424          * If we have already created P-State table,
 425          * we must make sure that number of entries
 426          * is consistent.
 427          */
 428         if (acpi_pstates != NULL && acpi_npstates != npstate) {
 429                 device_printf(dev, "Inconsistent # of P-States "
 430                               "cross Processor objects\n");
 431                 AcpiOsFree(obj);
 432                 return ENXIO;
 433         }
 434
 435         /*
 436          * Create a temporary P-State table
 437          */
 438         pstate = kmalloc(sizeof(*pstate) * npstate, M_TEMP, M_WAITOK);
 439         for (i = 0, p = pstate; i < npstate; ++i, ++p) {
 440                 ACPI_OBJECT *pkg;
 441                 uint32_t *ptr[ACPI_PSS_PX_NENTRY] = {
 442                         &p->st_freq, &p->st_power, &p->st_xsit_lat,
 443                         &p->st_bm_lat, &p->st_cval, &p->st_sval
 444                 };
 445                 int j;
 446
 447                 pkg = &obj->Package.Elements[i];
 448                 if (!ACPI_PKG_VALID(pkg, ACPI_PSS_PX_NENTRY)) {
 449                         device_printf(dev, "Invalud _PSS P%d\n", i);
 450                         AcpiOsFree(obj);
 451                         kfree(pstate, M_TEMP);
 452                         return ENXIO;
 453                 }
 454                 for (j = 0; j < ACPI_PSS_PX_NENTRY; ++j) {
 455                         if (acpi_PkgInt32(pkg, j, ptr[j]) != 0) {
 456                                 device_printf(dev, "Can't extract "
 457                                               "_PSS P%d %dth entry\n", i, j);
 458                                 AcpiOsFree(obj);
 459                                 kfree(pstate, M_TEMP);
 460                                 return ENXIO;
 461                         }
 462                 }
 463         }
 464
 465         /* Free _PSS */
 466         AcpiOsFree(obj);
 467
 468         if (acpi_pstates == NULL) {
 469                 /*
 470                  * If no P-State table is created yet,
 471                  * save the temporary one we just created.
 472                  */
 473                 acpi_pstates = pstate;
 474                 acpi_npstates = npstate;
 475                 pstate = NULL;
 476
 477                 if (bootverbose) {
 478                         for (i = 0; i < acpi_npstates; ++i) {
 479                                 device_printf(dev,
 480                                 "freq %u, pwr %u, xlat %u, blat %u, "
 481                                 "cv %08x, sv %08x\n",
 482                                 acpi_pstates[i].st_freq,
 483                                 acpi_pstates[i].st_power,
 484                                 acpi_pstates[i].st_xsit_lat,
 485                                 acpi_pstates[i].st_bm_lat,
 486                                 acpi_pstates[i].st_cval,
 487                                 acpi_pstates[i].st_sval);
 488                         }
 489                 }
 490         } else {
 491                 /*
 492                  * Make sure that P-State tables are same
 493                  * for all processors.
 494                  */
 495                 if (memcmp(pstate, acpi_pstates,
 496                            sizeof(*pstate) * npstate) != 0) {
 497                         device_printf(dev, "Inconsistent _PSS "
 498                                       "cross Processor objects\n");
 499                         kfree(pstate, M_TEMP);
 500                         return ENXIO;
 501                 }
 502                 kfree(pstate, M_TEMP);
 503         }
 504
 505         /* By default, we start from P-State table's first entry */
 506         sc->pst_sstart = 0;
 507
 508         /*
 509          * Adjust the usable first entry of P-State table,
 510          * if there is _PPC object.
 511          */
 512         buf.Pointer = NULL;
 513         buf.Length = ACPI_ALLOCATE_BUFFER;
 514         status = AcpiEvaluateObject(sc->pst_handle, "_PPC", NULL, &buf);
 515         if (!ACPI_FAILURE(status)) {
 516                 obj = (ACPI_OBJECT *)buf.Pointer;
 517                 if (obj->Type == ACPI_TYPE_INTEGER) {
 518                         if (obj->Integer.Value >= acpi_npstates) {
 519                                 device_printf(dev, "Invalid _PPC value\n");
 520                                 AcpiOsFree(obj);
 521                                 return ENXIO;
 522                         }
 523                         sc->pst_sstart = obj->Integer.Value;
 524                         if (bootverbose)
 525                                 device_printf(dev, "_PPC %d\n", sc->pst_sstart);
 526
 527                         /* TODO: Install notifiy handler */
 528                 } else {
 529                         device_printf(dev, "Invalid _PPC object\n");
 530                         AcpiOsFree(obj);
 531                         return ENXIO;
 532                 }
 533
 534                 /* Free _PPC */
 535                 AcpiOsFree(obj);
 536         }
 537
 538         sc->pst_state = sc->pst_sstart;
 539
 540         /* Link us with the domain */
 541         sc->pst_domain = dom;
 542         LIST_INSERT_HEAD(&dom->pd_pstlist, sc, pst_link);
 543
 544         if (device_get_unit(dev) == 0)
 545                 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_pst_postattach, NULL);
 546
 547         return 0;
 548 }
 549
 550 static struct acpi_pst_domain *
 551 acpi_pst_domain_create_pkg(device_t dev, ACPI_OBJECT *obj)
 552 {
 553         struct acpi_pst_domain *dom;
 554         uint32_t val, domain, coord, nproc;
 555
 556         if (!ACPI_PKG_VALID_EQ(obj, 5)) {
 557                 device_printf(dev, "Invalid _PSD package\n");
 558                 return NULL;
 559         }
 560
 561         /* NumberOfEntries */
 562         if (acpi_PkgInt32(obj, 0, &val) != 0 || val != 5) {
 563                 device_printf(dev, "Invalid _PSD NumberOfEntries\n");
 564                 return NULL;
 565         }
 566
 567         /* Revision */
 568         if (acpi_PkgInt32(obj, 1, &val) != 0 || val != 0) {
 569                 device_printf(dev, "Invalid _PSD Revision\n");
 570                 return NULL;
 571         }
 572
 573         if (acpi_PkgInt32(obj, 2, &domain) != 0 ||
 574             acpi_PkgInt32(obj, 3, &coord) != 0 ||
 575             acpi_PkgInt32(obj, 4, &nproc) != 0) {
 576                 device_printf(dev, "Can't extract _PSD package\n");
 577                 return NULL;
 578         }
 579
 580         if (!ACPI_PSD_COORD_VALID(coord)) {
 581                 device_printf(dev, "Invalid _PSD CoordType (%#x)\n", coord);
 582                 return NULL;
 583         }
 584
 585         if (nproc > MAXCPU) {
 586                 /*
 587                  * If NumProcessors is greater than MAXCPU
 588                  * and domain's coordination is SWALL, then
 589                  * we will never be able to start all CPUs
 590                  * within this domain, and power state
 591                  * transition will never be completed, so we
 592                  * just bail out here.
 593                  */
 594                 if (coord == ACPI_PSD_COORD_SWALL) {
 595                         device_printf(dev, "Unsupported _PSD NumProcessors "
 596                                       "(%d)\n", nproc);
 597                         return NULL;
 598                 }
 599         } else if (nproc == 0) {
 600                 device_printf(dev, "_PSD NumProcessors are zero\n");
 601                 return NULL;
 602         }
 603
 604         dom = acpi_pst_domain_find(domain);
 605         if (dom != NULL) {
 606                 if (dom->pd_flags & ACPI_PSTDOM_FLAG_INT) {
 607                         device_printf(dev, "Mixed Integer _PSD and "
 608                             "Package _PSD\n");
 609                         return NULL;
 610                 }
 611                 if (dom->pd_coord != coord || dom->pd_nproc != nproc) {
 612                         device_printf(dev, "Inconsistent _PSD information "
 613                                       "cross Processor objects\n");
 614                         return NULL;
 615                 }
 616                 return dom;
 617         }
 618
 619         dom = acpi_pst_domain_alloc(domain, coord, nproc);
 620         if (bootverbose)
 621                 device_printf(dev, "create pkg domain%u\n", dom->pd_dom);
 622
 623         return dom;
 624 }
 625
 626 static struct acpi_pst_domain *
 627 acpi_pst_domain_create_int(device_t dev, uint32_t domain)
 628 {
 629         struct acpi_pst_domain *dom;
 630
 631         dom = acpi_pst_domain_find(domain);
 632         if (dom != NULL) {
 633                 if ((dom->pd_flags & ACPI_PSTDOM_FLAG_INT) == 0) {
 634                         device_printf(dev, "Mixed Package _PSD and "
 635                             "Integer _PSD\n");
 636                         return NULL;
 637                 }
 638                 KKASSERT(dom->pd_coord == ACPI_PSD_COORD_SWALL);
 639
 640                 dom->pd_nproc++;
 641                 return dom;
 642         }
 643
 644         dom = acpi_pst_domain_alloc(domain, ACPI_PSD_COORD_SWALL, 1);
 645         dom->pd_flags |= ACPI_PSTDOM_FLAG_INT;
 646
 647         if (bootverbose)
 648                 device_printf(dev, "create int domain%u\n", dom->pd_dom);
 649
 650         return dom;
 651 }
 652
 653 static struct acpi_pst_domain *
 654 acpi_pst_domain_find(uint32_t domain)
 655 {
 656         struct acpi_pst_domain *dom;
 657
 658         LIST_FOREACH(dom, &acpi_pst_domains, pd_link) {
 659                 if (dom->pd_flags & ACPI_PSTDOM_FLAG_STUB)
 660                         continue;
 661                 if (dom->pd_dom == domain)
 662                         return dom;
 663         }
 664         return NULL;
 665 }
 666
 667 static struct acpi_pst_domain *
 668 acpi_pst_domain_alloc(uint32_t domain, uint32_t coord, uint32_t nproc)
 669 {
 670         struct acpi_pst_domain *dom;
 671
 672         dom = kmalloc(sizeof(*dom), M_DEVBUF, M_WAITOK | M_ZERO);
 673         dom->pd_dom = domain;
 674         dom->pd_coord = coord;
 675         dom->pd_nproc = nproc;
 676         dom->pd_state = 0; /* XXX */
 677         dom->pd_sstart = 0; /* XXX */
 678         LIST_INIT(&dom->pd_pstlist);
 679
 680         LIST_INSERT_HEAD(&acpi_pst_domains, dom, pd_link);
 681
 682         return dom;
 683 }
 684
 685 static int
 686 acpi_pst_domain_set_pstate(struct acpi_pst_domain *dom, int i)
 687 {
 688         const struct acpi_pstate *pstate;
 689         struct acpi_pst_softc *sc;
 690         int done, error;
 691
 692         KKASSERT(i >= 0 && i < acpi_npstates);
 693         pstate = &acpi_pstates[i];
 694
 695         done = 0;
 696         LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 697                 if (!done) {
 698                         error = acpi_pst_set_pstate(sc, pstate);
 699                         if (error) {
 700                                 device_printf(sc->pst_dev, "can't set "
 701                                               "freq %d\n", pstate->st_freq);
 702                                 /* XXX error cleanup? */
 703                         }
 704                         if (dom->pd_coord == ACPI_PSD_COORD_SWANY)
 705                                 done = 1;
 706                 }
 707                 sc->pst_state = i;
 708         }
 709         dom->pd_state = i;
 710
 711         return 0;
 712 }
 713
 714 static int
 715 acpi_pst_global_set_pstate(int i)
 716 {
 717         struct acpi_pst_domain *dom;
 718
 719         LIST_FOREACH(dom, &acpi_pst_domains, pd_link) {
 720                 /* Skip dead domain */
 721                 if (dom->pd_flags & ACPI_PSTDOM_FLAG_DEAD)
 722                         continue;
 723                 acpi_pst_domain_set_pstate(dom, i);
 724         }
 725         acpi_pst_global_state = i;
 726
 727         return 0;
 728 }
 729
 730 static void
 731 acpi_pst_postattach(void *arg __unused)
 732 {
 733         struct acpi_pst_domain *dom;
 734         struct acpi_cpux_softc *cpux;
 735         device_t *devices;
 736         int i, ndevices, error, has_domain, sstate;
 737
 738         devices = NULL;
 739         ndevices = 0;
 740         error = devclass_get_devices(acpi_pst_devclass, &devices, &ndevices);
 741         if (error)
 742                 return;
 743
 744         if (ndevices == 0)
 745                 return;
 746
 747         cpux = NULL;
 748         for (i = 0; i < ndevices; ++i) {
 749                 cpux = device_get_softc(device_get_parent(devices[i]));
 750                 if (cpux->glob_sysctl_tree != NULL)
 751                         break;
 752         }
 753         kfree(devices, M_TEMP);
 754         KKASSERT(cpux != NULL);
 755
 756         if (acpi_pst_md == NULL)
 757                 kprintf("ACPI: no P-State CPU driver\n");
 758
 759         sstate = 0x7fffffff;
 760         has_domain = 0;
 761         LIST_FOREACH(dom, &acpi_pst_domains, pd_link) {
 762                 struct acpi_pst_softc *sc;
 763                 char buf[32];
 764
 765                 /*
 766                  * Make sure that all processors belonging to this
 767                  * domain are located.
 768                  */
 769                 i = 0;
 770                 LIST_FOREACH(sc, &dom->pd_pstlist, pst_link)
 771                         ++i;
 772                 if (i != dom->pd_nproc) {
 773                         KKASSERT(i < dom->pd_nproc);
 774
 775                         kprintf("ACPI: domain%u misses processors, "
 776                                 "should be %d, got %d\n", dom->pd_dom,
 777                                 dom->pd_nproc, i);
 778                         if (dom->pd_coord == ACPI_PSD_COORD_SWALL) {
 779                                 /*
 780                                  * If this domain's coordination is
 781                                  * SWALL and we don't see all of the
 782                                  * member CPUs of this domain, then
 783                                  * the P-State transition will never
 784                                  * be completed, so just leave this
 785                                  * domain out.
 786                                  */
 787                                 dom->pd_flags |= ACPI_PSTDOM_FLAG_DEAD;
 788                                 continue;
 789                         }
 790                         dom->pd_nproc = i;
 791                 }
 792
 793                 /*
 794                  * Validate P-State configurations for this domain
 795                  */
 796                 LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 797                         error = acpi_pst_check_csr(sc);
 798                         if (error)
 799                                 break;
 800
 801                         error = acpi_pst_check_pstates(sc);
 802                         if (error)
 803                                 break;
 804                 }
 805                 if (sc != NULL) {
 806                         kprintf("ACPI: domain%u P-State configuration "
 807                                 "check failed\n", dom->pd_dom);
 808                         dom->pd_flags |= ACPI_PSTDOM_FLAG_DEAD;
 809                         continue;
 810                 }
 811
 812                 /*
 813                  * Do necssary P-State initialization
 814                  */
 815                 LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 816                         error = acpi_pst_init(sc);
 817                         if (error)
 818                                 break;
 819                 }
 820                 if (sc != NULL) {
 821                         kprintf("ACPI: domain%u P-State initialization "
 822                                 "check failed\n", dom->pd_dom);
 823                         dom->pd_flags |= ACPI_PSTDOM_FLAG_DEAD;
 824                         continue;
 825                 }
 826
 827                 has_domain = 1;
 828
 829                 ksnprintf(buf, sizeof(buf), "px_dom%u", dom->pd_dom);
 830
 831                 sysctl_ctx_init(&dom->pd_sysctl_ctx);
 832                 dom->pd_sysctl_tree =
 833                 SYSCTL_ADD_NODE(&dom->pd_sysctl_ctx,
 834                         SYSCTL_CHILDREN(cpux->glob_sysctl_tree),
 835                         OID_AUTO, buf, CTLFLAG_RD, 0,
 836                         "P-State domain");
 837                 if (dom->pd_sysctl_tree == NULL) {
 838                         kprintf("ACPI: Can't create sysctl tree for domain%u",
 839                                 dom->pd_dom);
 840                         continue;
 841                 }
 842
 843                 SYSCTL_ADD_PROC(&dom->pd_sysctl_ctx,
 844                                 SYSCTL_CHILDREN(dom->pd_sysctl_tree),
 845                                 OID_AUTO, "available",
 846                                 CTLTYPE_STRING | CTLFLAG_RD,
 847                                 dom, 0, acpi_pst_sysctl_freqs, "A",
 848                                 "available frequencies");
 849
 850                 SYSCTL_ADD_PROC(&dom->pd_sysctl_ctx,
 851                                 SYSCTL_CHILDREN(dom->pd_sysctl_tree),
 852                                 OID_AUTO, "members",
 853                                 CTLTYPE_STRING | CTLFLAG_RD,
 854                                 dom, 0, acpi_pst_sysctl_members, "A",
 855                                 "member cpus");
 856
 857                 if (acpi_pst_md != NULL &&
 858                     acpi_pst_md->pmd_set_pstate != NULL) {
 859                         SYSCTL_ADD_PROC(&dom->pd_sysctl_ctx,
 860                                         SYSCTL_CHILDREN(dom->pd_sysctl_tree),
 861                                         OID_AUTO, "select",
 862                                         CTLTYPE_UINT | CTLFLAG_RW,
 863                                         dom, 0, acpi_pst_sysctl_select,
 864                                         "IU", "select freq");
 865                 }
 866
 867                 if (dom->pd_state < sstate)
 868                         sstate = dom->pd_state;
 869         }
 870
 871         if (has_domain && acpi_pst_md != NULL &&
 872             acpi_pst_md->pmd_set_pstate != NULL) {
 873                 SYSCTL_ADD_PROC(&cpux->glob_sysctl_ctx,
 874                                 SYSCTL_CHILDREN(cpux->glob_sysctl_tree),
 875                                 OID_AUTO, "px_global",
 876                                 CTLTYPE_UINT | CTLFLAG_RW,
 877                                 NULL, 0, acpi_pst_sysctl_global,
 878                                 "IU", "select freq for all domains");
 879
 880                 acpi_pst_global_set_pstate(sstate);
 881         }
 882 }
 883
 884 static int
 885 acpi_pst_sysctl_freqs(SYSCTL_HANDLER_ARGS)
 886 {
 887         struct acpi_pst_domain *dom = arg1;
 888         int i, error;
 889
 890         error = 0;
 891         for (i = 0; i < acpi_npstates; ++i) {
 892                 if (error == 0 && i)
 893                         error = SYSCTL_OUT(req, " ", 1);
 894                 if (error == 0) {
 895                         const char *pat;
 896                         char buf[32];
 897
 898                         if (i < dom->pd_sstart)
 899                                 pat = "(%u)";
 900                         else
 901                                 pat = "%u";
 902
 903                         ksnprintf(buf, sizeof(buf), pat,
 904                                   acpi_pstates[i].st_freq);
 905                         error = SYSCTL_OUT(req, buf, strlen(buf));
 906                 }
 907         }
 908         return error;
 909 }
 910
 911 static int
 912 acpi_pst_sysctl_members(SYSCTL_HANDLER_ARGS)
 913 {
 914         struct acpi_pst_domain *dom = arg1;
 915         struct acpi_pst_softc *sc;
 916         int loop, error;
 917
 918         loop = error = 0;
 919         LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 920                 char buf[32];
 921
 922                 if (error == 0 && loop)
 923                         error = SYSCTL_OUT(req, " ", 1);
 924                 if (error == 0) {
 925                         ksnprintf(buf, sizeof(buf), "cpu%d", sc->pst_cpuid);
 926                         error = SYSCTL_OUT(req, buf, strlen(buf));
 927                 }
 928
 929                 if (error == 0 && acpi_pst_md && acpi_pst_md->pmd_get_pstate) {
 930                         const struct acpi_pstate *pstate;
 931                         const char *str;
 932
 933                         pstate = acpi_pst_get_pstate(sc);
 934                         if (pstate == NULL) {
 935                                 str = "(*)";
 936                         } else {
 937                                 ksnprintf(buf, sizeof(buf), "(%d)",
 938                                           pstate->st_freq);
 939                                 str = buf;
 940                         }
 941                         error = SYSCTL_OUT(req, str, strlen(str));
 942                 }
 943                 ++loop;
 944         }
 945         return error;
 946 }
 947
 948 static int
 949 acpi_pst_sysctl_select(SYSCTL_HANDLER_ARGS)
 950 {
 951         struct acpi_pst_domain *dom = arg1;
 952         int error, i, freq;
 953
 954         KKASSERT(dom->pd_state >= 0 && dom->pd_state < acpi_npstates);
 955
 956         freq = acpi_pstates[dom->pd_state].st_freq;
 957
 958         error = sysctl_handle_int(oidp, &freq, 0, req);
 959         if (error || req->newptr == NULL)
 960                 return error;
 961
 962         i = acpi_pst_freq2index(freq);
 963         if (i < 0)
 964                 return EINVAL;
 965
 966         acpi_pst_domain_set_pstate(dom, i);
 967         return 0;
 968 }
 969
 970 static int
 971 acpi_pst_sysctl_global(SYSCTL_HANDLER_ARGS)
 972 {
 973         int error, i, freq;
 974
 975         KKASSERT(acpi_pst_global_state >= 0 &&
 976                  acpi_pst_global_state < acpi_npstates);
 977
 978         freq = acpi_pstates[acpi_pst_global_state].st_freq;
 979
 980         error = sysctl_handle_int(oidp, &freq, 0, req);
 981         if (error || req->newptr == NULL)
 982                 return error;
 983
 984         i = acpi_pst_freq2index(freq);
 985         if (i < 0)
 986                 return EINVAL;
 987
 988         acpi_pst_global_set_pstate(i);
 989
 990         return 0;
 991 }
 992
 993 static void
 994 acpi_pst_check_csr_handler(netmsg_t msg)
 995 {
 996         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
 997         int error;
 998
 999         error = acpi_pst_md->pmd_check_csr(rmsg->ctrl, rmsg->status);
1000         lwkt_replymsg(&rmsg->base.lmsg, error);
1001 }
1002
1003 static int
1004 acpi_pst_check_csr(struct acpi_pst_softc *sc)
1005 {
1006         struct netmsg_acpi_pst msg;
1007
1008         if (acpi_pst_md == NULL)
1009                 return 0;
1010
1011         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1012                     MSGF_PRIORITY, acpi_pst_check_csr_handler);
1013         msg.ctrl = &sc->pst_creg;
1014         msg.status = &sc->pst_sreg;
1015
1016         return lwkt_domsg(cpu_portfn(sc->pst_cpuid), &msg.base.lmsg, 0);
1017 }
1018
1019 static void
1020 acpi_pst_check_pstates_handler(netmsg_t msg)
1021 {
1022         int error;
1023
1024         error = acpi_pst_md->pmd_check_pstates(acpi_pstates, acpi_npstates);
1025         lwkt_replymsg(&msg->lmsg, error);
1026 }
1027
1028 static int
1029 acpi_pst_check_pstates(struct acpi_pst_softc *sc)
1030 {
1031         struct netmsg_base msg;
1032
1033         if (acpi_pst_md == NULL)
1034                 return 0;
1035
1036         netmsg_init(&msg, NULL, &curthread->td_msgport,
1037                     MSGF_PRIORITY, acpi_pst_check_pstates_handler);
1038
1039         return lwkt_domsg(cpu_portfn(sc->pst_cpuid), &msg.lmsg, 0);
1040 }
1041
1042 static void
1043 acpi_pst_init_handler(netmsg_t msg)
1044 {
1045         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1046         int error;
1047
1048         error = acpi_pst_md->pmd_init(rmsg->ctrl, rmsg->status);
1049         lwkt_replymsg(&rmsg->base.lmsg, error);
1050 }
1051
1052 static int
1053 acpi_pst_init(struct acpi_pst_softc *sc)
1054 {
1055         struct netmsg_acpi_pst msg;
1056
1057         if (acpi_pst_md == NULL)
1058                 return 0;
1059
1060         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1061                     MSGF_PRIORITY, acpi_pst_init_handler);
1062         msg.ctrl = &sc->pst_creg;
1063         msg.status = &sc->pst_sreg;
1064
1065         return lwkt_domsg(cpu_portfn(sc->pst_cpuid), &msg.base.lmsg, 0);
1066 }
1067
1068 static void
1069 acpi_pst_set_pstate_handler(netmsg_t msg)
1070 {
1071         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1072         int error;
1073
1074         error = acpi_pst_md->pmd_set_pstate(rmsg->ctrl, rmsg->status,
1075                                             rmsg->base.lmsg.u.ms_resultp);
1076         lwkt_replymsg(&rmsg->base.lmsg, error);
1077 }
1078
1079 static int
1080 acpi_pst_set_pstate(struct acpi_pst_softc *sc, const struct acpi_pstate *pstate)
1081 {
1082         struct netmsg_acpi_pst msg;
1083
1084         KKASSERT(acpi_pst_md != NULL);
1085
1086         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1087                     MSGF_PRIORITY, acpi_pst_set_pstate_handler);
1088         msg.base.lmsg.u.ms_resultp = __DECONST(void *, pstate);
1089         msg.ctrl = &sc->pst_creg;
1090         msg.status = &sc->pst_sreg;
1091
1092         return lwkt_domsg(cpu_portfn(sc->pst_cpuid), &msg.base.lmsg, 0);
1093 }
1094
1095 static void
1096 acpi_pst_get_pstate_handler(netmsg_t msg)
1097 {
1098         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1099         const struct acpi_pstate *pstate;
1100
1101         pstate = acpi_pst_md->pmd_get_pstate(rmsg->status, acpi_pstates,
1102                                              acpi_npstates);
1103         rmsg->base.lmsg.u.ms_resultp = __DECONST(void *, pstate);
1104         lwkt_replymsg(&rmsg->base.lmsg, 0);
1105 }
1106
1107 static const struct acpi_pstate *
1108 acpi_pst_get_pstate(struct acpi_pst_softc *sc)
1109 {
1110         struct netmsg_acpi_pst msg;
1111
1112         if (acpi_pst_md == NULL)
1113                 return 0;
1114
1115         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1116                     MSGF_PRIORITY, acpi_pst_get_pstate_handler);
1117         msg.status = &sc->pst_sreg;
1118
1119         lwkt_domsg(cpu_portfn(sc->pst_cpuid), &msg.base.lmsg, 0);
1120         return msg.base.lmsg.u.ms_resultp;
1121 }
1122
1123 static int
1124 acpi_pst_alloc_resource(device_t dev, ACPI_OBJECT *obj, int idx,
1125                         struct acpi_pst_res *res)
1126 {
1127         struct acpi_pst_softc *sc = device_get_softc(dev);
1128         int error, type;
1129
1130         /* Save GAS */
1131         error = acpi_PkgRawGas(obj, idx, &res->pr_gas);
1132         if (error)
1133                 return error;
1134
1135         /* Allocate resource, if possible */
1136         res->pr_rid = sc->pst_parent->cpux_next_rid;
1137         acpi_bus_alloc_gas(dev, &type, &res->pr_rid, &res->pr_gas, &res->pr_res, 0);
1138         if (res->pr_res != NULL) {
1139                 sc->pst_parent->cpux_next_rid++;
1140                 res->pr_bt = rman_get_bustag(res->pr_res);
1141                 res->pr_bh = rman_get_bushandle(res->pr_res);
1142         } else {
1143                 res->pr_rid = 0;
1144         }
1145         return 0;
1146 }