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, NULL, NULL);
 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
 300                 if (acpi_pst_domain_id > 0) {
 301                         device_printf(dev, "Missing _PSD for certain CPUs\n");
 302                         AcpiOsFree(obj);
 303                         return ENXIO;
 304                 }
 305                 acpi_pst_domain_id = -1;
 306
 307                 if (ACPI_PKG_VALID_EQ(obj, 1)) {
 308                         dom = acpi_pst_domain_create_pkg(dev,
 309                                 &obj->Package.Elements[0]);
 310                         if (dom == NULL) {
 311                                 AcpiOsFree(obj);
 312                                 return ENXIO;
 313                         }
 314                 } else {
 315                         if (obj->Type != ACPI_TYPE_INTEGER) {
 316                                 device_printf(dev,
 317                                     "Invalid _PSD package, Type 0x%x\n",
 318                                     obj->Type);
 319                                 AcpiOsFree(obj);
 320                                 return ENXIO;
 321                         } else {
 322                                 device_printf(dev, "Integer _PSD %ju\n",
 323                                     (uintmax_t)obj->Integer.Value);
 324                                 dom = acpi_pst_domain_create_int(dev,
 325                                     obj->Integer.Value);
 326                                 if (dom == NULL) {
 327                                         AcpiOsFree(obj);
 328                                         return ENXIO;
 329                                 }
 330                         }
 331                 }
 332
 333                 /* Free _PSD */
 334                 AcpiOsFree(buf.Pointer);
 335         } else {
 336                 if (acpi_pst_domain_id < 0) {
 337                         device_printf(dev, "Missing _PSD for cpu%d\n",
 338                             sc->pst_cpuid);
 339                         return ENXIO;
 340                 }
 341
 342                 /*
 343                  * Create a stub one processor domain for each processor
 344                  */
 345                 dom = acpi_pst_domain_alloc(acpi_pst_domain_id,
 346                         ACPI_PSD_COORD_SWANY, 1);
 347                 dom->pd_flags |= ACPI_PSTDOM_FLAG_STUB;
 348
 349                 ++acpi_pst_domain_id;
 350         }
 351
 352         /* Make sure that adding us will not overflow our domain */
 353         i = 0;
 354         LIST_FOREACH(pst, &dom->pd_pstlist, pst_link)
 355                 ++i;
 356         if (i == dom->pd_nproc) {
 357                 device_printf(dev, "Domain%u already contains %d P-States, "
 358                               "invalid _PSD package\n",
 359                               dom->pd_dom, dom->pd_nproc);
 360                 return ENXIO;
 361         }
 362         KKASSERT(i < dom->pd_nproc);
 363
 364         /*
 365          * Get control/status registers from _PCT
 366          */
 367         buf.Pointer = NULL;
 368         buf.Length = ACPI_ALLOCATE_BUFFER;
 369         status = AcpiEvaluateObject(sc->pst_handle, "_PCT", NULL, &buf);
 370         if (ACPI_FAILURE(status)) {
 371                 device_printf(dev, "Can't get _PCT package - %s\n",
 372                               AcpiFormatException(status));
 373                 return ENXIO;
 374         }
 375
 376         obj = (ACPI_OBJECT *)buf.Pointer;
 377         if (!ACPI_PKG_VALID_EQ(obj, 2)) {
 378                 device_printf(dev, "Invalid _PCT package\n");
 379                 AcpiOsFree(obj);
 380                 return ENXIO;
 381         }
 382
 383         /* Save and try allocating control register */
 384         error = acpi_pst_alloc_resource(dev, obj, 0, &sc->pst_creg);
 385         if (error) {
 386                 AcpiOsFree(obj);
 387                 return error;
 388         }
 389         if (bootverbose) {
 390                 device_printf(dev, "control reg %d %jx\n",
 391                               sc->pst_creg.pr_gas.SpaceId,
 392                               (uintmax_t)sc->pst_creg.pr_gas.Address);
 393         }
 394
 395         /* Save and try allocating status register */
 396         error = acpi_pst_alloc_resource(dev, obj, 1, &sc->pst_sreg);
 397         if (error) {
 398                 AcpiOsFree(obj);
 399                 return error;
 400         }
 401         if (bootverbose) {
 402                 device_printf(dev, "status reg %d %jx\n",
 403                               sc->pst_sreg.pr_gas.SpaceId,
 404                               (uintmax_t)sc->pst_sreg.pr_gas.Address);
 405         }
 406
 407         /* Free _PCT */
 408         AcpiOsFree(obj);
 409
 410         /*
 411          * Create P-State table according to _PSS
 412          */
 413         buf.Pointer = NULL;
 414         buf.Length = ACPI_ALLOCATE_BUFFER;
 415         status = AcpiEvaluateObject(sc->pst_handle, "_PSS", NULL, &buf);
 416         if (ACPI_FAILURE(status)) {
 417                 device_printf(dev, "Can't get _PSS package - %s\n",
 418                               AcpiFormatException(status));
 419                 return ENXIO;
 420         }
 421
 422         obj = (ACPI_OBJECT *)buf.Pointer;
 423         if (!ACPI_PKG_VALID(obj, 1)) {
 424                 device_printf(dev, "Invalid _PSS package\n");
 425                 AcpiOsFree(obj);
 426                 return ENXIO;
 427         }
 428
 429         /* Don't create too many P-States */
 430         npstate = obj->Package.Count;
 431         if (npstate > ACPI_NPSTATE_MAX) {
 432                 device_printf(dev, "Too many P-States, %d->%d\n",
 433                               npstate, ACPI_NPSTATE_MAX);
 434                 npstate = ACPI_NPSTATE_MAX;
 435         }
 436
 437         /*
 438          * If we have already created P-State table,
 439          * we must make sure that number of entries
 440          * is consistent.
 441          */
 442         if (acpi_pstates != NULL && acpi_npstates != npstate) {
 443                 device_printf(dev, "Inconsistent # of P-States "
 444                               "cross Processor objects\n");
 445                 AcpiOsFree(obj);
 446                 return ENXIO;
 447         }
 448
 449         /*
 450          * Create a temporary P-State table
 451          */
 452         pstate = kmalloc(sizeof(*pstate) * npstate, M_TEMP, M_WAITOK);
 453         for (i = 0, p = pstate; i < npstate; ++i, ++p) {
 454                 ACPI_OBJECT *pkg;
 455                 uint32_t *ptr[ACPI_PSS_PX_NENTRY] = {
 456                         &p->st_freq, &p->st_power, &p->st_xsit_lat,
 457                         &p->st_bm_lat, &p->st_cval, &p->st_sval
 458                 };
 459                 int j;
 460
 461                 pkg = &obj->Package.Elements[i];
 462                 if (!ACPI_PKG_VALID(pkg, ACPI_PSS_PX_NENTRY)) {
 463                         device_printf(dev, "Invalud _PSS P%d\n", i);
 464                         AcpiOsFree(obj);
 465                         kfree(pstate, M_TEMP);
 466                         return ENXIO;
 467                 }
 468                 for (j = 0; j < ACPI_PSS_PX_NENTRY; ++j) {
 469                         if (acpi_PkgInt32(pkg, j, ptr[j]) != 0) {
 470                                 device_printf(dev, "Can't extract "
 471                                               "_PSS P%d %dth entry\n", i, j);
 472                                 AcpiOsFree(obj);
 473                                 kfree(pstate, M_TEMP);
 474                                 return ENXIO;
 475                         }
 476                 }
 477         }
 478
 479         /* Free _PSS */
 480         AcpiOsFree(obj);
 481
 482         if (acpi_pstates == NULL) {
 483                 /*
 484                  * If no P-State table is created yet,
 485                  * save the temporary one we just created.
 486                  */
 487                 acpi_pstates = pstate;
 488                 acpi_npstates = npstate;
 489                 pstate = NULL;
 490
 491                 if (bootverbose) {
 492                         for (i = 0; i < acpi_npstates; ++i) {
 493                                 device_printf(dev,
 494                                 "freq %u, pwr %u, xlat %u, blat %u, "
 495                                 "cv %08x, sv %08x\n",
 496                                 acpi_pstates[i].st_freq,
 497                                 acpi_pstates[i].st_power,
 498                                 acpi_pstates[i].st_xsit_lat,
 499                                 acpi_pstates[i].st_bm_lat,
 500                                 acpi_pstates[i].st_cval,
 501                                 acpi_pstates[i].st_sval);
 502                         }
 503                 }
 504         } else {
 505                 /*
 506                  * Make sure that P-State tables are same
 507                  * for all processors.
 508                  */
 509                 if (memcmp(pstate, acpi_pstates,
 510                            sizeof(*pstate) * npstate) != 0) {
 511                         device_printf(dev, "Inconsistent _PSS "
 512                                       "cross Processor objects\n");
 513                         kfree(pstate, M_TEMP);
 514                         return ENXIO;
 515                 }
 516                 kfree(pstate, M_TEMP);
 517         }
 518
 519         /* By default, we start from P-State table's first entry */
 520         sc->pst_sstart = 0;
 521
 522         /*
 523          * Adjust the usable first entry of P-State table,
 524          * if there is _PPC object.
 525          */
 526         buf.Pointer = NULL;
 527         buf.Length = ACPI_ALLOCATE_BUFFER;
 528         status = AcpiEvaluateObject(sc->pst_handle, "_PPC", NULL, &buf);
 529         if (!ACPI_FAILURE(status)) {
 530                 obj = (ACPI_OBJECT *)buf.Pointer;
 531                 if (obj->Type == ACPI_TYPE_INTEGER) {
 532                         if (obj->Integer.Value >= acpi_npstates) {
 533                                 device_printf(dev, "Invalid _PPC value\n");
 534                                 AcpiOsFree(obj);
 535                                 return ENXIO;
 536                         }
 537                         sc->pst_sstart = obj->Integer.Value;
 538                         if (bootverbose)
 539                                 device_printf(dev, "_PPC %d\n", sc->pst_sstart);
 540
 541                         /* TODO: Install notifiy handler */
 542                 } else {
 543                         device_printf(dev, "Invalid _PPC object\n");
 544                         AcpiOsFree(obj);
 545                         return ENXIO;
 546                 }
 547
 548                 /* Free _PPC */
 549                 AcpiOsFree(obj);
 550         }
 551
 552         sc->pst_state = sc->pst_sstart;
 553
 554         /* Link us with the domain */
 555         sc->pst_domain = dom;
 556         LIST_INSERT_HEAD(&dom->pd_pstlist, sc, pst_link);
 557
 558         if (device_get_unit(dev) == 0)
 559                 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_pst_postattach, NULL);
 560
 561         return 0;
 562 }
 563
 564 static struct acpi_pst_domain *
 565 acpi_pst_domain_create_pkg(device_t dev, ACPI_OBJECT *obj)
 566 {
 567         struct acpi_pst_domain *dom;
 568         uint32_t val, domain, coord, nproc;
 569
 570         if (!ACPI_PKG_VALID_EQ(obj, 5)) {
 571                 device_printf(dev, "Invalid _PSD package\n");
 572                 return NULL;
 573         }
 574
 575         /* NumberOfEntries */
 576         if (acpi_PkgInt32(obj, 0, &val) != 0 || val != 5) {
 577                 device_printf(dev, "Invalid _PSD NumberOfEntries\n");
 578                 return NULL;
 579         }
 580
 581         /* Revision */
 582         if (acpi_PkgInt32(obj, 1, &val) != 0 || val != 0) {
 583                 device_printf(dev, "Invalid _PSD Revision\n");
 584                 return NULL;
 585         }
 586
 587         if (acpi_PkgInt32(obj, 2, &domain) != 0 ||
 588             acpi_PkgInt32(obj, 3, &coord) != 0 ||
 589             acpi_PkgInt32(obj, 4, &nproc) != 0) {
 590                 device_printf(dev, "Can't extract _PSD package\n");
 591                 return NULL;
 592         }
 593
 594         if (!ACPI_PSD_COORD_VALID(coord)) {
 595                 device_printf(dev, "Invalid _PSD CoordType (%#x)\n", coord);
 596                 return NULL;
 597         }
 598
 599         if (nproc > MAXCPU) {
 600                 /*
 601                  * If NumProcessors is greater than MAXCPU
 602                  * and domain's coordination is SWALL, then
 603                  * we will never be able to start all CPUs
 604                  * within this domain, and power state
 605                  * transition will never be completed, so we
 606                  * just bail out here.
 607                  */
 608                 if (coord == ACPI_PSD_COORD_SWALL) {
 609                         device_printf(dev, "Unsupported _PSD NumProcessors "
 610                                       "(%d)\n", nproc);
 611                         return NULL;
 612                 }
 613         } else if (nproc == 0) {
 614                 device_printf(dev, "_PSD NumProcessors are zero\n");
 615                 return NULL;
 616         }
 617
 618         dom = acpi_pst_domain_find(domain);
 619         if (dom != NULL) {
 620                 if (dom->pd_flags & ACPI_PSTDOM_FLAG_INT) {
 621                         device_printf(dev, "Mixed Integer _PSD and "
 622                             "Package _PSD\n");
 623                         return NULL;
 624                 }
 625                 if (dom->pd_coord != coord || dom->pd_nproc != nproc) {
 626                         device_printf(dev, "Inconsistent _PSD information "
 627                                       "cross Processor objects\n");
 628                         return NULL;
 629                 }
 630                 return dom;
 631         }
 632
 633         dom = acpi_pst_domain_alloc(domain, coord, nproc);
 634         if (bootverbose)
 635                 device_printf(dev, "create pkg domain%u\n", dom->pd_dom);
 636
 637         return dom;
 638 }
 639
 640 static struct acpi_pst_domain *
 641 acpi_pst_domain_create_int(device_t dev, uint32_t domain)
 642 {
 643         struct acpi_pst_domain *dom;
 644
 645         dom = acpi_pst_domain_find(domain);
 646         if (dom != NULL) {
 647                 if ((dom->pd_flags & ACPI_PSTDOM_FLAG_INT) == 0) {
 648                         device_printf(dev, "Mixed Package _PSD and "
 649                             "Integer _PSD\n");
 650                         return NULL;
 651                 }
 652                 KKASSERT(dom->pd_coord == ACPI_PSD_COORD_SWALL);
 653
 654                 dom->pd_nproc++;
 655                 return dom;
 656         }
 657
 658         dom = acpi_pst_domain_alloc(domain, ACPI_PSD_COORD_SWALL, 1);
 659         dom->pd_flags |= ACPI_PSTDOM_FLAG_INT;
 660
 661         if (bootverbose)
 662                 device_printf(dev, "create int domain%u\n", dom->pd_dom);
 663
 664         return dom;
 665 }
 666
 667 static struct acpi_pst_domain *
 668 acpi_pst_domain_find(uint32_t domain)
 669 {
 670         struct acpi_pst_domain *dom;
 671
 672         LIST_FOREACH(dom, &acpi_pst_domains, pd_link) {
 673                 if (dom->pd_flags & ACPI_PSTDOM_FLAG_STUB)
 674                         continue;
 675                 if (dom->pd_dom == domain)
 676                         return dom;
 677         }
 678         return NULL;
 679 }
 680
 681 static struct acpi_pst_domain *
 682 acpi_pst_domain_alloc(uint32_t domain, uint32_t coord, uint32_t nproc)
 683 {
 684         struct acpi_pst_domain *dom;
 685
 686         dom = kmalloc(sizeof(*dom), M_DEVBUF, M_WAITOK | M_ZERO);
 687         dom->pd_dom = domain;
 688         dom->pd_coord = coord;
 689         dom->pd_nproc = nproc;
 690         dom->pd_state = 0; /* XXX */
 691         dom->pd_sstart = 0; /* XXX */
 692         LIST_INIT(&dom->pd_pstlist);
 693
 694         LIST_INSERT_HEAD(&acpi_pst_domains, dom, pd_link);
 695
 696         return dom;
 697 }
 698
 699 static int
 700 acpi_pst_domain_set_pstate(struct acpi_pst_domain *dom, int i)
 701 {
 702         const struct acpi_pstate *pstate;
 703         struct acpi_pst_softc *sc;
 704         int done, error;
 705
 706         KKASSERT(i >= 0 && i < acpi_npstates);
 707         pstate = &acpi_pstates[i];
 708
 709         done = 0;
 710         LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 711                 if (!done) {
 712                         error = acpi_pst_set_pstate(sc, pstate);
 713                         if (error) {
 714                                 device_printf(sc->pst_dev, "can't set "
 715                                               "freq %d\n", pstate->st_freq);
 716                                 /* XXX error cleanup? */
 717                         }
 718                         if (dom->pd_coord == ACPI_PSD_COORD_SWANY)
 719                                 done = 1;
 720                 }
 721                 sc->pst_state = i;
 722         }
 723         dom->pd_state = i;
 724
 725         return 0;
 726 }
 727
 728 static int
 729 acpi_pst_global_set_pstate(int i)
 730 {
 731         struct acpi_pst_domain *dom;
 732
 733         LIST_FOREACH(dom, &acpi_pst_domains, pd_link) {
 734                 /* Skip dead domain */
 735                 if (dom->pd_flags & ACPI_PSTDOM_FLAG_DEAD)
 736                         continue;
 737                 acpi_pst_domain_set_pstate(dom, i);
 738         }
 739         acpi_pst_global_state = i;
 740
 741         return 0;
 742 }
 743
 744 static void
 745 acpi_pst_postattach(void *arg __unused)
 746 {
 747         struct acpi_pst_domain *dom;
 748         struct acpi_cpux_softc *cpux;
 749         device_t *devices;
 750         int i, ndevices, error, has_domain, sstate;
 751
 752         devices = NULL;
 753         ndevices = 0;
 754         error = devclass_get_devices(acpi_pst_devclass, &devices, &ndevices);
 755         if (error)
 756                 return;
 757
 758         if (ndevices == 0)
 759                 return;
 760
 761         cpux = NULL;
 762         for (i = 0; i < ndevices; ++i) {
 763                 cpux = device_get_softc(device_get_parent(devices[i]));
 764                 if (cpux->glob_sysctl_tree != NULL)
 765                         break;
 766         }
 767         kfree(devices, M_TEMP);
 768         KKASSERT(cpux != NULL);
 769
 770         if (acpi_pst_md == NULL)
 771                 kprintf("ACPI: no P-State CPU driver\n");
 772
 773         sstate = 0x7fffffff;
 774         has_domain = 0;
 775         LIST_FOREACH(dom, &acpi_pst_domains, pd_link) {
 776                 struct acpi_pst_softc *sc;
 777                 char buf[32];
 778
 779                 /*
 780                  * Make sure that all processors belonging to this
 781                  * domain are located.
 782                  */
 783                 i = 0;
 784                 LIST_FOREACH(sc, &dom->pd_pstlist, pst_link)
 785                         ++i;
 786                 if (i != dom->pd_nproc) {
 787                         KKASSERT(i < dom->pd_nproc);
 788
 789                         kprintf("ACPI: domain%u misses processors, "
 790                                 "should be %d, got %d\n", dom->pd_dom,
 791                                 dom->pd_nproc, i);
 792                         if (dom->pd_coord == ACPI_PSD_COORD_SWALL) {
 793                                 /*
 794                                  * If this domain's coordination is
 795                                  * SWALL and we don't see all of the
 796                                  * member CPUs of this domain, then
 797                                  * the P-State transition will never
 798                                  * be completed, so just leave this
 799                                  * domain out.
 800                                  */
 801                                 dom->pd_flags |= ACPI_PSTDOM_FLAG_DEAD;
 802                                 continue;
 803                         }
 804                         dom->pd_nproc = i;
 805                 }
 806
 807                 /*
 808                  * Validate P-State configurations for this domain
 809                  */
 810                 LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 811                         error = acpi_pst_check_csr(sc);
 812                         if (error)
 813                                 break;
 814
 815                         error = acpi_pst_check_pstates(sc);
 816                         if (error)
 817                                 break;
 818                 }
 819                 if (sc != NULL) {
 820                         kprintf("ACPI: domain%u P-State configuration "
 821                                 "check failed\n", dom->pd_dom);
 822                         dom->pd_flags |= ACPI_PSTDOM_FLAG_DEAD;
 823                         continue;
 824                 }
 825
 826                 /*
 827                  * Do necssary P-State initialization
 828                  */
 829                 LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 830                         error = acpi_pst_init(sc);
 831                         if (error)
 832                                 break;
 833                 }
 834                 if (sc != NULL) {
 835                         kprintf("ACPI: domain%u P-State initialization "
 836                                 "check failed\n", dom->pd_dom);
 837                         dom->pd_flags |= ACPI_PSTDOM_FLAG_DEAD;
 838                         continue;
 839                 }
 840
 841                 has_domain = 1;
 842
 843                 ksnprintf(buf, sizeof(buf), "px_dom%u", dom->pd_dom);
 844
 845                 sysctl_ctx_init(&dom->pd_sysctl_ctx);
 846                 dom->pd_sysctl_tree =
 847                 SYSCTL_ADD_NODE(&dom->pd_sysctl_ctx,
 848                         SYSCTL_CHILDREN(cpux->glob_sysctl_tree),
 849                         OID_AUTO, buf, CTLFLAG_RD, 0,
 850                         "P-State domain");
 851                 if (dom->pd_sysctl_tree == NULL) {
 852                         kprintf("ACPI: Can't create sysctl tree for domain%u",
 853                                 dom->pd_dom);
 854                         continue;
 855                 }
 856
 857                 SYSCTL_ADD_PROC(&dom->pd_sysctl_ctx,
 858                                 SYSCTL_CHILDREN(dom->pd_sysctl_tree),
 859                                 OID_AUTO, "available",
 860                                 CTLTYPE_STRING | CTLFLAG_RD,
 861                                 dom, 0, acpi_pst_sysctl_freqs, "A",
 862                                 "available frequencies");
 863
 864                 SYSCTL_ADD_PROC(&dom->pd_sysctl_ctx,
 865                                 SYSCTL_CHILDREN(dom->pd_sysctl_tree),
 866                                 OID_AUTO, "members",
 867                                 CTLTYPE_STRING | CTLFLAG_RD,
 868                                 dom, 0, acpi_pst_sysctl_members, "A",
 869                                 "member cpus");
 870
 871                 if (acpi_pst_md != NULL &&
 872                     acpi_pst_md->pmd_set_pstate != NULL) {
 873                         SYSCTL_ADD_PROC(&dom->pd_sysctl_ctx,
 874                                         SYSCTL_CHILDREN(dom->pd_sysctl_tree),
 875                                         OID_AUTO, "select",
 876                                         CTLTYPE_UINT | CTLFLAG_RW,
 877                                         dom, 0, acpi_pst_sysctl_select,
 878                                         "IU", "select freq");
 879                 }
 880
 881                 if (dom->pd_state < sstate)
 882                         sstate = dom->pd_state;
 883         }
 884
 885         if (has_domain && acpi_pst_md != NULL &&
 886             acpi_pst_md->pmd_set_pstate != NULL) {
 887                 SYSCTL_ADD_PROC(&cpux->glob_sysctl_ctx,
 888                                 SYSCTL_CHILDREN(cpux->glob_sysctl_tree),
 889                                 OID_AUTO, "px_global",
 890                                 CTLTYPE_UINT | CTLFLAG_RW,
 891                                 NULL, 0, acpi_pst_sysctl_global,
 892                                 "IU", "select freq for all domains");
 893
 894                 acpi_pst_global_set_pstate(sstate);
 895         }
 896 }
 897
 898 static int
 899 acpi_pst_sysctl_freqs(SYSCTL_HANDLER_ARGS)
 900 {
 901         struct acpi_pst_domain *dom = arg1;
 902         int i, error;
 903
 904         error = 0;
 905         for (i = 0; i < acpi_npstates; ++i) {
 906                 if (error == 0 && i)
 907                         error = SYSCTL_OUT(req, " ", 1);
 908                 if (error == 0) {
 909                         const char *pat;
 910                         char buf[32];
 911
 912                         if (i < dom->pd_sstart)
 913                                 pat = "(%u)";
 914                         else
 915                                 pat = "%u";
 916
 917                         ksnprintf(buf, sizeof(buf), pat,
 918                                   acpi_pstates[i].st_freq);
 919                         error = SYSCTL_OUT(req, buf, strlen(buf));
 920                 }
 921         }
 922         return error;
 923 }
 924
 925 static int
 926 acpi_pst_sysctl_members(SYSCTL_HANDLER_ARGS)
 927 {
 928         struct acpi_pst_domain *dom = arg1;
 929         struct acpi_pst_softc *sc;
 930         int loop, error;
 931
 932         loop = error = 0;
 933         LIST_FOREACH(sc, &dom->pd_pstlist, pst_link) {
 934                 char buf[32];
 935
 936                 if (error == 0 && loop)
 937                         error = SYSCTL_OUT(req, " ", 1);
 938                 if (error == 0) {
 939                         ksnprintf(buf, sizeof(buf), "cpu%d", sc->pst_cpuid);
 940                         error = SYSCTL_OUT(req, buf, strlen(buf));
 941                 }
 942
 943                 if (error == 0 && acpi_pst_md && acpi_pst_md->pmd_get_pstate) {
 944                         const struct acpi_pstate *pstate;
 945                         const char *str;
 946
 947                         pstate = acpi_pst_get_pstate(sc);
 948                         if (pstate == NULL) {
 949                                 str = "(*)";
 950                         } else {
 951                                 ksnprintf(buf, sizeof(buf), "(%d)",
 952                                           pstate->st_freq);
 953                                 str = buf;
 954                         }
 955                         error = SYSCTL_OUT(req, str, strlen(str));
 956                 }
 957                 ++loop;
 958         }
 959         return error;
 960 }
 961
 962 static int
 963 acpi_pst_sysctl_select(SYSCTL_HANDLER_ARGS)
 964 {
 965         struct acpi_pst_domain *dom = arg1;
 966         int error, i, freq;
 967
 968         KKASSERT(dom->pd_state >= 0 && dom->pd_state < acpi_npstates);
 969
 970         freq = acpi_pstates[dom->pd_state].st_freq;
 971
 972         error = sysctl_handle_int(oidp, &freq, 0, req);
 973         if (error || req->newptr == NULL)
 974                 return error;
 975
 976         i = acpi_pst_freq2index(freq);
 977         if (i < 0)
 978                 return EINVAL;
 979
 980         acpi_pst_domain_set_pstate(dom, i);
 981         return 0;
 982 }
 983
 984 static int
 985 acpi_pst_sysctl_global(SYSCTL_HANDLER_ARGS)
 986 {
 987         int error, i, freq;
 988
 989         KKASSERT(acpi_pst_global_state >= 0 &&
 990                  acpi_pst_global_state < acpi_npstates);
 991
 992         freq = acpi_pstates[acpi_pst_global_state].st_freq;
 993
 994         error = sysctl_handle_int(oidp, &freq, 0, req);
 995         if (error || req->newptr == NULL)
 996                 return error;
 997
 998         i = acpi_pst_freq2index(freq);
 999         if (i < 0)
1000                 return EINVAL;
1001
1002         acpi_pst_global_set_pstate(i);
1003
1004         return 0;
1005 }
1006
1007 static void
1008 acpi_pst_check_csr_handler(netmsg_t msg)
1009 {
1010         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1011         int error;
1012
1013         error = acpi_pst_md->pmd_check_csr(rmsg->ctrl, rmsg->status);
1014         lwkt_replymsg(&rmsg->base.lmsg, error);
1015 }
1016
1017 static int
1018 acpi_pst_check_csr(struct acpi_pst_softc *sc)
1019 {
1020         struct netmsg_acpi_pst msg;
1021
1022         if (acpi_pst_md == NULL)
1023                 return 0;
1024
1025         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1026                     MSGF_PRIORITY, acpi_pst_check_csr_handler);
1027         msg.ctrl = &sc->pst_creg;
1028         msg.status = &sc->pst_sreg;
1029
1030         return lwkt_domsg(cpu_portfn(sc->pst_cpuid), &msg.base.lmsg, 0);
1031 }
1032
1033 static void
1034 acpi_pst_check_pstates_handler(netmsg_t msg)
1035 {
1036         int error;
1037
1038         error = acpi_pst_md->pmd_check_pstates(acpi_pstates, acpi_npstates);
1039         lwkt_replymsg(&msg->lmsg, error);
1040 }
1041
1042 static int
1043 acpi_pst_check_pstates(struct acpi_pst_softc *sc)
1044 {
1045         struct netmsg_base msg;
1046
1047         if (acpi_pst_md == NULL)
1048                 return 0;
1049
1050         netmsg_init(&msg, NULL, &curthread->td_msgport,
1051                     MSGF_PRIORITY, acpi_pst_check_pstates_handler);
1052
1053         return lwkt_domsg(cpu_portfn(sc->pst_cpuid), &msg.lmsg, 0);
1054 }
1055
1056 static void
1057 acpi_pst_init_handler(netmsg_t msg)
1058 {
1059         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1060         int error;
1061
1062         error = acpi_pst_md->pmd_init(rmsg->ctrl, rmsg->status);
1063         lwkt_replymsg(&rmsg->base.lmsg, error);
1064 }
1065
1066 static int
1067 acpi_pst_init(struct acpi_pst_softc *sc)
1068 {
1069         struct netmsg_acpi_pst msg;
1070
1071         if (acpi_pst_md == NULL)
1072                 return 0;
1073
1074         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1075                     MSGF_PRIORITY, acpi_pst_init_handler);
1076         msg.ctrl = &sc->pst_creg;
1077         msg.status = &sc->pst_sreg;
1078
1079         return lwkt_domsg(cpu_portfn(sc->pst_cpuid), &msg.base.lmsg, 0);
1080 }
1081
1082 static void
1083 acpi_pst_set_pstate_handler(netmsg_t msg)
1084 {
1085         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1086         int error;
1087
1088         error = acpi_pst_md->pmd_set_pstate(rmsg->ctrl, rmsg->status,
1089                                             rmsg->base.lmsg.u.ms_resultp);
1090         lwkt_replymsg(&rmsg->base.lmsg, error);
1091 }
1092
1093 static int
1094 acpi_pst_set_pstate(struct acpi_pst_softc *sc, const struct acpi_pstate *pstate)
1095 {
1096         struct netmsg_acpi_pst msg;
1097
1098         KKASSERT(acpi_pst_md != NULL);
1099
1100         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1101                     MSGF_PRIORITY, acpi_pst_set_pstate_handler);
1102         msg.base.lmsg.u.ms_resultp = __DECONST(void *, pstate);
1103         msg.ctrl = &sc->pst_creg;
1104         msg.status = &sc->pst_sreg;
1105
1106         return lwkt_domsg(cpu_portfn(sc->pst_cpuid), &msg.base.lmsg, 0);
1107 }
1108
1109 static void
1110 acpi_pst_get_pstate_handler(netmsg_t msg)
1111 {
1112         struct netmsg_acpi_pst *rmsg = (struct netmsg_acpi_pst *)msg;
1113         const struct acpi_pstate *pstate;
1114
1115         pstate = acpi_pst_md->pmd_get_pstate(rmsg->status, acpi_pstates,
1116                                              acpi_npstates);
1117         rmsg->base.lmsg.u.ms_resultp = __DECONST(void *, pstate);
1118         lwkt_replymsg(&rmsg->base.lmsg, 0);
1119 }
1120
1121 static const struct acpi_pstate *
1122 acpi_pst_get_pstate(struct acpi_pst_softc *sc)
1123 {
1124         struct netmsg_acpi_pst msg;
1125
1126         if (acpi_pst_md == NULL)
1127                 return 0;
1128
1129         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
1130                     MSGF_PRIORITY, acpi_pst_get_pstate_handler);
1131         msg.status = &sc->pst_sreg;
1132
1133         lwkt_domsg(cpu_portfn(sc->pst_cpuid), &msg.base.lmsg, 0);
1134         return msg.base.lmsg.u.ms_resultp;
1135 }
1136
1137 static int
1138 acpi_pst_alloc_resource(device_t dev, ACPI_OBJECT *obj, int idx,
1139                         struct acpi_pst_res *res)
1140 {
1141         struct acpi_pst_softc *sc = device_get_softc(dev);
1142         int error, type;
1143
1144         /* Save GAS */
1145         error = acpi_PkgRawGas(obj, idx, &res->pr_gas);
1146         if (error)
1147                 return error;
1148
1149         /* Allocate resource, if possible */
1150         res->pr_rid = sc->pst_parent->cpux_next_rid;
1151         acpi_bus_alloc_gas(dev, &type, &res->pr_rid, &res->pr_gas, &res->pr_res, 0);
1152         if (res->pr_res != NULL) {
1153                 sc->pst_parent->cpux_next_rid++;
1154                 res->pr_bt = rman_get_bustag(res->pr_res);
1155                 res->pr_bh = rman_get_bushandle(res->pr_res);
1156         } else {
1157                 res->pr_rid = 0;
1158         }
1159         return 0;
1160 }