drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c

   1 /*
   2  * Copyright 2013 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs
  23  */
  24 #include "priv.h"
  25
  26 #include <subdev/bios.h>
  27 #include <subdev/bios/boost.h>
  28 #include <subdev/bios/cstep.h>
  29 #include <subdev/bios/perf.h>
  30 #include <subdev/bios/vpstate.h>
  31 #include <subdev/fb.h>
  32 #include <subdev/therm.h>
  33 #include <subdev/volt.h>
  34
  35 #include <core/option.h>
  36
  37 /******************************************************************************
  38  * misc
  39  *****************************************************************************/
  40 static u32
  41 nvkm_clk_adjust(struct nvkm_clk *clk, bool adjust,
  42                 u8 pstate, u8 domain, u32 input)
  43 {
  44         struct nvkm_bios *bios = clk->subdev.device->bios;
  45         struct nvbios_boostE boostE;
  46         u8  ver, hdr, cnt, len;
  47         u32 data;
  48
  49         data = nvbios_boostEm(bios, pstate, &ver, &hdr, &cnt, &len, &boostE);
  50         if (data) {
  51                 struct nvbios_boostS boostS;
  52                 u8  idx = 0, sver, shdr;
  53                 u32 subd;
  54
  55                 input = max(boostE.min, input);
  56                 input = min(boostE.max, input);
  57                 do {
  58                         sver = ver;
  59                         shdr = hdr;
  60                         subd = nvbios_boostSp(bios, idx++, data, &sver, &shdr,
  61                                               cnt, len, &boostS);
  62                         if (subd && boostS.domain == domain) {
  63                                 if (adjust)
  64                                         input = input * boostS.percent / 100;
  65                                 input = max(boostS.min, input);
  66                                 input = min(boostS.max, input);
  67                                 break;
  68                         }
  69                 } while (subd);
  70         }
  71
  72         return input;
  73 }
  74
  75 /******************************************************************************
  76  * C-States
  77  *****************************************************************************/
  78 static bool
  79 nvkm_cstate_valid(struct nvkm_clk *clk, struct nvkm_cstate *cstate,
  80                   u32 max_volt, int temp)
  81 {
  82         const struct nvkm_domain *domain = clk->domains;
  83         struct nvkm_volt *volt = clk->subdev.device->volt;
  84         int voltage;
  85
  86         while (domain && domain->name != nv_clk_src_max) {
  87                 if (domain->flags & NVKM_CLK_DOM_FLAG_VPSTATE) {
  88                         u32 freq = cstate->domain[domain->name];
  89                         switch (clk->boost_mode) {
  90                         case NVKM_CLK_BOOST_NONE:
  91                                 if (clk->base_khz && freq > clk->base_khz)
  92                                         return false;
  93                         case NVKM_CLK_BOOST_BIOS:
  94                                 if (clk->boost_khz && freq > clk->boost_khz)
  95                                         return false;
  96                         }
  97                 }
  98                 domain++;
  99         }
 100
 101         if (!volt)
 102                 return true;
 103
 104         voltage = nvkm_volt_map(volt, cstate->voltage, temp);
 105         if (voltage < 0)
 106                 return false;
 107         return voltage <= min(max_volt, volt->max_uv);
 108 }
 109
 110 static struct nvkm_cstate *
 111 nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
 112                       struct nvkm_cstate *start)
 113 {
 114         struct nvkm_device *device = clk->subdev.device;
 115         struct nvkm_volt *volt = device->volt;
 116         struct nvkm_cstate *cstate;
 117         int max_volt;
 118
 119         if (!pstate || !start)
 120                 return NULL;
 121
 122         if (!volt)
 123                 return start;
 124
 125         max_volt = volt->max_uv;
 126         if (volt->max0_id != 0xff)
 127                 max_volt = min(max_volt,
 128                                nvkm_volt_map(volt, volt->max0_id, clk->temp));
 129         if (volt->max1_id != 0xff)
 130                 max_volt = min(max_volt,
 131                                nvkm_volt_map(volt, volt->max1_id, clk->temp));
 132         if (volt->max2_id != 0xff)
 133                 max_volt = min(max_volt,
 134                                nvkm_volt_map(volt, volt->max2_id, clk->temp));
 135
 136         for (cstate = start; &cstate->head != &pstate->list;
 137              cstate = list_entry(cstate->head.prev, typeof(*cstate), head)) {
 138                 if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
 139                         break;
 140         }
 141
 142         return cstate;
 143 }
 144
 145 static struct nvkm_cstate *
 146 nvkm_cstate_get(struct nvkm_clk *clk, struct nvkm_pstate *pstate, int cstatei)
 147 {
 148         struct nvkm_cstate *cstate;
 149         if (cstatei == NVKM_CLK_CSTATE_HIGHEST)
 150                 return list_last_entry(&pstate->list, typeof(*cstate), head);
 151         else {
 152                 list_for_each_entry(cstate, &pstate->list, head) {
 153                         if (cstate->id == cstatei)
 154                                 return cstate;
 155                 }
 156         }
 157         return NULL;
 158 }
 159
 160 static int
 161 nvkm_cstate_prog(struct nvkm_clk *clk, struct nvkm_pstate *pstate, int cstatei)
 162 {
 163         struct nvkm_subdev *subdev = &clk->subdev;
 164         struct nvkm_device *device = subdev->device;
 165         struct nvkm_therm *therm = device->therm;
 166         struct nvkm_volt *volt = device->volt;
 167         struct nvkm_cstate *cstate;
 168         int ret;
 169
 170         if (!list_empty(&pstate->list)) {
 171                 cstate = nvkm_cstate_get(clk, pstate, cstatei);
 172                 cstate = nvkm_cstate_find_best(clk, pstate, cstate);
 173         } else {
 174                 cstate = &pstate->base;
 175         }
 176
 177         if (therm) {
 178                 ret = nvkm_therm_cstate(therm, pstate->fanspeed, +1);
 179                 if (ret && ret != -ENODEV) {
 180                         nvkm_error(subdev, "failed to raise fan speed: %d\n", ret);
 181                         return ret;
 182                 }
 183         }
 184
 185         if (volt) {
 186                 ret = nvkm_volt_set_id(volt, cstate->voltage,
 187                                        pstate->base.voltage, clk->temp, +1);
 188                 if (ret && ret != -ENODEV) {
 189                         nvkm_error(subdev, "failed to raise voltage: %d\n", ret);
 190                         return ret;
 191                 }
 192         }
 193
 194         ret = clk->func->calc(clk, cstate);
 195         if (ret == 0) {
 196                 ret = clk->func->prog(clk);
 197                 clk->func->tidy(clk);
 198         }
 199
 200         if (volt) {
 201                 ret = nvkm_volt_set_id(volt, cstate->voltage,
 202                                        pstate->base.voltage, clk->temp, -1);
 203                 if (ret && ret != -ENODEV)
 204                         nvkm_error(subdev, "failed to lower voltage: %d\n", ret);
 205         }
 206
 207         if (therm) {
 208                 ret = nvkm_therm_cstate(therm, pstate->fanspeed, -1);
 209                 if (ret && ret != -ENODEV)
 210                         nvkm_error(subdev, "failed to lower fan speed: %d\n", ret);
 211         }
 212
 213         return ret;
 214 }
 215
 216 static void
 217 nvkm_cstate_del(struct nvkm_cstate *cstate)
 218 {
 219         list_del(&cstate->head);
 220         kfree(cstate);
 221 }
 222
 223 static int
 224 nvkm_cstate_new(struct nvkm_clk *clk, int idx, struct nvkm_pstate *pstate)
 225 {
 226         struct nvkm_bios *bios = clk->subdev.device->bios;
 227         struct nvkm_volt *volt = clk->subdev.device->volt;
 228         const struct nvkm_domain *domain = clk->domains;
 229         struct nvkm_cstate *cstate = NULL;
 230         struct nvbios_cstepX cstepX;
 231         u8  ver, hdr;
 232         u32 data;
 233
 234         data = nvbios_cstepXp(bios, idx, &ver, &hdr, &cstepX);
 235         if (!data)
 236                 return -ENOENT;
 237
 238         if (volt && nvkm_volt_map_min(volt, cstepX.voltage) > volt->max_uv)
 239                 return -EINVAL;
 240
 241         cstate = kzalloc(sizeof(*cstate), GFP_KERNEL);
 242         if (!cstate)
 243                 return -ENOMEM;
 244
 245         *cstate = pstate->base;
 246         cstate->voltage = cstepX.voltage;
 247         cstate->id = idx;
 248
 249         while (domain && domain->name != nv_clk_src_max) {
 250                 if (domain->flags & NVKM_CLK_DOM_FLAG_CORE) {
 251                         u32 freq = nvkm_clk_adjust(clk, true, pstate->pstate,
 252                                                    domain->bios, cstepX.freq);
 253                         cstate->domain[domain->name] = freq;
 254                 }
 255                 domain++;
 256         }
 257
 258         list_add(&cstate->head, &pstate->list);
 259         return 0;
 260 }
 261
 262 /******************************************************************************
 263  * P-States
 264  *****************************************************************************/
 265 static int
 266 nvkm_pstate_prog(struct nvkm_clk *clk, int pstatei)
 267 {
 268         struct nvkm_subdev *subdev = &clk->subdev;
 269         struct nvkm_fb *fb = subdev->device->fb;
 270         struct nvkm_pci *pci = subdev->device->pci;
 271         struct nvkm_pstate *pstate;
 272         int ret, idx = 0;
 273
 274         list_for_each_entry(pstate, &clk->states, head) {
 275                 if (idx++ == pstatei)
 276                         break;
 277         }
 278
 279         nvkm_debug(subdev, "setting performance state %d\n", pstatei);
 280         clk->pstate = pstatei;
 281
 282         nvkm_pcie_set_link(pci, pstate->pcie_speed, pstate->pcie_width);
 283
 284         if (fb && fb->ram && fb->ram->func->calc) {
 285                 struct nvkm_ram *ram = fb->ram;
 286                 int khz = pstate->base.domain[nv_clk_src_mem];
 287                 do {
 288                         ret = ram->func->calc(ram, khz);
 289                         if (ret == 0)
 290                                 ret = ram->func->prog(ram);
 291                 } while (ret > 0);
 292                 ram->func->tidy(ram);
 293         }
 294
 295         return nvkm_cstate_prog(clk, pstate, NVKM_CLK_CSTATE_HIGHEST);
 296 }
 297
 298 static void
 299 nvkm_pstate_work(struct work_struct *work)
 300 {
 301         struct nvkm_clk *clk = container_of(work, typeof(*clk), work);
 302         struct nvkm_subdev *subdev = &clk->subdev;
 303         int pstate;
 304
 305         if (!atomic_xchg(&clk->waiting, 0))
 306                 return;
 307         clk->pwrsrc = power_supply_is_system_supplied();
 308
 309         nvkm_trace(subdev, "P %d PWR %d U(AC) %d U(DC) %d A %d T %d°C D %d\n",
 310                    clk->pstate, clk->pwrsrc, clk->ustate_ac, clk->ustate_dc,
 311                    clk->astate, clk->temp, clk->dstate);
 312
 313         pstate = clk->pwrsrc ? clk->ustate_ac : clk->ustate_dc;
 314         if (clk->state_nr && pstate != -1) {
 315                 pstate = (pstate < 0) ? clk->astate : pstate;
 316                 pstate = min(pstate, clk->state_nr - 1);
 317                 pstate = max(pstate, clk->dstate);
 318         } else {
 319                 pstate = clk->pstate = -1;
 320         }
 321
 322         nvkm_trace(subdev, "-> %d\n", pstate);
 323         if (pstate != clk->pstate) {
 324                 int ret = nvkm_pstate_prog(clk, pstate);
 325                 if (ret) {
 326                         nvkm_error(subdev, "error setting pstate %d: %d\n",
 327                                    pstate, ret);
 328                 }
 329         }
 330
 331         wake_up_all(&clk->wait);
 332         nvkm_notify_get(&clk->pwrsrc_ntfy);
 333 }
 334
 335 static int
 336 nvkm_pstate_calc(struct nvkm_clk *clk, bool wait)
 337 {
 338         atomic_set(&clk->waiting, 1);
 339         schedule_work(&clk->work);
 340         if (wait)
 341                 wait_event(clk->wait, !atomic_read(&clk->waiting));
 342         return 0;
 343 }
 344
 345 static void
 346 nvkm_pstate_info(struct nvkm_clk *clk, struct nvkm_pstate *pstate)
 347 {
 348         const struct nvkm_domain *clock = clk->domains - 1;
 349         struct nvkm_cstate *cstate;
 350         struct nvkm_subdev *subdev = &clk->subdev;
 351         char info[3][32] = { "", "", "" };
 352         char name[4] = "--";
 353         int i = -1;
 354
 355         if (pstate->pstate != 0xff)
 356                 snprintf(name, sizeof(name), "%02x", pstate->pstate);
 357
 358         while ((++clock)->name != nv_clk_src_max) {
 359                 u32 lo = pstate->base.domain[clock->name];
 360                 u32 hi = lo;
 361                 if (hi == 0)
 362                         continue;
 363
 364                 nvkm_debug(subdev, "%02x: %10d KHz\n", clock->name, lo);
 365                 list_for_each_entry(cstate, &pstate->list, head) {
 366                         u32 freq = cstate->domain[clock->name];
 367                         lo = min(lo, freq);
 368                         hi = max(hi, freq);
 369                         nvkm_debug(subdev, "%10d KHz\n", freq);
 370                 }
 371
 372                 if (clock->mname && ++i < ARRAY_SIZE(info)) {
 373                         lo /= clock->mdiv;
 374                         hi /= clock->mdiv;
 375                         if (lo == hi) {
 376                                 snprintf(info[i], sizeof(info[i]), "%s %d MHz",
 377                                          clock->mname, lo);
 378                         } else {
 379                                 snprintf(info[i], sizeof(info[i]),
 380                                          "%s %d-%d MHz", clock->mname, lo, hi);
 381                         }
 382                 }
 383         }
 384
 385         nvkm_debug(subdev, "%s: %s %s %s\n", name, info[0], info[1], info[2]);
 386 }
 387
 388 static void
 389 nvkm_pstate_del(struct nvkm_pstate *pstate)
 390 {
 391         struct nvkm_cstate *cstate, *temp;
 392
 393         list_for_each_entry_safe(cstate, temp, &pstate->list, head) {
 394                 nvkm_cstate_del(cstate);
 395         }
 396
 397         list_del(&pstate->head);
 398         kfree(pstate);
 399 }
 400
 401 static int
 402 nvkm_pstate_new(struct nvkm_clk *clk, int idx)
 403 {
 404         struct nvkm_bios *bios = clk->subdev.device->bios;
 405         const struct nvkm_domain *domain = clk->domains - 1;
 406         struct nvkm_pstate *pstate;
 407         struct nvkm_cstate *cstate;
 408         struct nvbios_cstepE cstepE;
 409         struct nvbios_perfE perfE;
 410         u8  ver, hdr, cnt, len;
 411         u32 data;
 412
 413         data = nvbios_perfEp(bios, idx, &ver, &hdr, &cnt, &len, &perfE);
 414         if (!data)
 415                 return -EINVAL;
 416         if (perfE.pstate == 0xff)
 417                 return 0;
 418
 419         pstate = kzalloc(sizeof(*pstate), GFP_KERNEL);
 420         cstate = &pstate->base;
 421         if (!pstate)
 422                 return -ENOMEM;
 423
 424         INIT_LIST_HEAD(&pstate->list);
 425
 426         pstate->pstate = perfE.pstate;
 427         pstate->fanspeed = perfE.fanspeed;
 428         pstate->pcie_speed = perfE.pcie_speed;
 429         pstate->pcie_width = perfE.pcie_width;
 430         cstate->voltage = perfE.voltage;
 431         cstate->domain[nv_clk_src_core] = perfE.core;
 432         cstate->domain[nv_clk_src_shader] = perfE.shader;
 433         cstate->domain[nv_clk_src_mem] = perfE.memory;
 434         cstate->domain[nv_clk_src_vdec] = perfE.vdec;
 435         cstate->domain[nv_clk_src_dom6] = perfE.disp;
 436
 437         while (ver >= 0x40 && (++domain)->name != nv_clk_src_max) {
 438                 struct nvbios_perfS perfS;
 439                 u8  sver = ver, shdr = hdr;
 440                 u32 perfSe = nvbios_perfSp(bios, data, domain->bios,
 441                                           &sver, &shdr, cnt, len, &perfS);
 442                 if (perfSe == 0 || sver != 0x40)
 443                         continue;
 444
 445                 if (domain->flags & NVKM_CLK_DOM_FLAG_CORE) {
 446                         perfS.v40.freq = nvkm_clk_adjust(clk, false,
 447                                                          pstate->pstate,
 448                                                          domain->bios,
 449                                                          perfS.v40.freq);
 450                 }
 451
 452                 cstate->domain[domain->name] = perfS.v40.freq;
 453         }
 454
 455         data = nvbios_cstepEm(bios, pstate->pstate, &ver, &hdr, &cstepE);
 456         if (data) {
 457                 int idx = cstepE.index;
 458                 do {
 459                         nvkm_cstate_new(clk, idx, pstate);
 460                 } while(idx--);
 461         }
 462
 463         nvkm_pstate_info(clk, pstate);
 464         list_add_tail(&pstate->head, &clk->states);
 465         clk->state_nr++;
 466         return 0;
 467 }
 468
 469 /******************************************************************************
 470  * Adjustment triggers
 471  *****************************************************************************/
 472 static int
 473 nvkm_clk_ustate_update(struct nvkm_clk *clk, int req)
 474 {
 475         struct nvkm_pstate *pstate;
 476         int i = 0;
 477
 478         if (!clk->allow_reclock)
 479                 return -ENOSYS;
 480
 481         if (req != -1 && req != -2) {
 482                 list_for_each_entry(pstate, &clk->states, head) {
 483                         if (pstate->pstate == req)
 484                                 break;
 485                         i++;
 486                 }
 487
 488                 if (pstate->pstate != req)
 489                         return -EINVAL;
 490                 req = i;
 491         }
 492
 493         return req + 2;
 494 }
 495
 496 static int
 497 nvkm_clk_nstate(struct nvkm_clk *clk, const char *mode, int arglen)
 498 {
 499         int ret = 1;
 500
 501         if (clk->allow_reclock && !strncasecmpz(mode, "auto", arglen))
 502                 return -2;
 503
 504         if (strncasecmpz(mode, "disabled", arglen)) {
 505                 char save = mode[arglen];
 506                 long v;
 507
 508                 ((char *)mode)[arglen] = '\0';
 509                 if (!kstrtol(mode, 0, &v)) {
 510                         ret = nvkm_clk_ustate_update(clk, v);
 511                         if (ret < 0)
 512                                 ret = 1;
 513                 }
 514                 ((char *)mode)[arglen] = save;
 515         }
 516
 517         return ret - 2;
 518 }
 519
 520 int
 521 nvkm_clk_ustate(struct nvkm_clk *clk, int req, int pwr)
 522 {
 523         int ret = nvkm_clk_ustate_update(clk, req);
 524         if (ret >= 0) {
 525                 if (ret -= 2, pwr) clk->ustate_ac = ret;
 526                 else               clk->ustate_dc = ret;
 527                 return nvkm_pstate_calc(clk, true);
 528         }
 529         return ret;
 530 }
 531
 532 int
 533 nvkm_clk_astate(struct nvkm_clk *clk, int req, int rel, bool wait)
 534 {
 535         if (!rel) clk->astate  = req;
 536         if ( rel) clk->astate += rel;
 537         clk->astate = min(clk->astate, clk->state_nr - 1);
 538         clk->astate = max(clk->astate, 0);
 539         return nvkm_pstate_calc(clk, wait);
 540 }
 541
 542 int
 543 nvkm_clk_tstate(struct nvkm_clk *clk, u8 temp)
 544 {
 545         if (clk->temp == temp)
 546                 return 0;
 547         clk->temp = temp;
 548         return nvkm_pstate_calc(clk, false);
 549 }
 550
 551 int
 552 nvkm_clk_dstate(struct nvkm_clk *clk, int req, int rel)
 553 {
 554         if (!rel) clk->dstate  = req;
 555         if ( rel) clk->dstate += rel;
 556         clk->dstate = min(clk->dstate, clk->state_nr - 1);
 557         clk->dstate = max(clk->dstate, 0);
 558         return nvkm_pstate_calc(clk, true);
 559 }
 560
 561 static int
 562 nvkm_clk_pwrsrc(struct nvkm_notify *notify)
 563 {
 564         struct nvkm_clk *clk =
 565                 container_of(notify, typeof(*clk), pwrsrc_ntfy);
 566         nvkm_pstate_calc(clk, false);
 567         return NVKM_NOTIFY_DROP;
 568 }
 569
 570 /******************************************************************************
 571  * subdev base class implementation
 572  *****************************************************************************/
 573
 574 int
 575 nvkm_clk_read(struct nvkm_clk *clk, enum nv_clk_src src)
 576 {
 577         return clk->func->read(clk, src);
 578 }
 579
 580 static int
 581 nvkm_clk_fini(struct nvkm_subdev *subdev, bool suspend)
 582 {
 583         struct nvkm_clk *clk = nvkm_clk(subdev);
 584         nvkm_notify_put(&clk->pwrsrc_ntfy);
 585         flush_work(&clk->work);
 586         if (clk->func->fini)
 587                 clk->func->fini(clk);
 588         return 0;
 589 }
 590
 591 static int
 592 nvkm_clk_init(struct nvkm_subdev *subdev)
 593 {
 594         struct nvkm_clk *clk = nvkm_clk(subdev);
 595         const struct nvkm_domain *clock = clk->domains;
 596         int ret;
 597
 598         memset(&clk->bstate, 0x00, sizeof(clk->bstate));
 599         INIT_LIST_HEAD(&clk->bstate.list);
 600         clk->bstate.pstate = 0xff;
 601
 602         while (clock->name != nv_clk_src_max) {
 603                 ret = nvkm_clk_read(clk, clock->name);
 604                 if (ret < 0) {
 605                         nvkm_error(subdev, "%02x freq unknown\n", clock->name);
 606                         return ret;
 607                 }
 608                 clk->bstate.base.domain[clock->name] = ret;
 609                 clock++;
 610         }
 611
 612         nvkm_pstate_info(clk, &clk->bstate);
 613
 614         if (clk->func->init)
 615                 return clk->func->init(clk);
 616
 617         clk->astate = clk->state_nr - 1;
 618         clk->dstate = 0;
 619         clk->pstate = -1;
 620         clk->temp = 90; /* reasonable default value */
 621         nvkm_pstate_calc(clk, true);
 622         return 0;
 623 }
 624
 625 static void *
 626 nvkm_clk_dtor(struct nvkm_subdev *subdev)
 627 {
 628         struct nvkm_clk *clk = nvkm_clk(subdev);
 629         struct nvkm_pstate *pstate, *temp;
 630
 631         nvkm_notify_fini(&clk->pwrsrc_ntfy);
 632
 633         /* Early return if the pstates have been provided statically */
 634         if (clk->func->pstates)
 635                 return clk;
 636
 637         list_for_each_entry_safe(pstate, temp, &clk->states, head) {
 638                 nvkm_pstate_del(pstate);
 639         }
 640
 641         return clk;
 642 }
 643
 644 static const struct nvkm_subdev_func
 645 nvkm_clk = {
 646         .dtor = nvkm_clk_dtor,
 647         .init = nvkm_clk_init,
 648         .fini = nvkm_clk_fini,
 649 };
 650
 651 int
 652 nvkm_clk_ctor(const struct nvkm_clk_func *func, struct nvkm_device *device,
 653               int index, bool allow_reclock, struct nvkm_clk *clk)
 654 {
 655         struct nvkm_subdev *subdev = &clk->subdev;
 656         struct nvkm_bios *bios = device->bios;
 657         int ret, idx, arglen;
 658         const char *mode;
 659         struct nvbios_vpstate_header h;
 660
 661         nvkm_subdev_ctor(&nvkm_clk, device, index, subdev);
 662
 663         if (bios && !nvbios_vpstate_parse(bios, &h)) {
 664                 struct nvbios_vpstate_entry base, boost;
 665                 if (!nvbios_vpstate_entry(bios, &h, h.boost_id, &boost))
 666                         clk->boost_khz = boost.clock_mhz * 1000;
 667                 if (!nvbios_vpstate_entry(bios, &h, h.base_id, &base))
 668                         clk->base_khz = base.clock_mhz * 1000;
 669         }
 670
 671         clk->func = func;
 672         INIT_LIST_HEAD(&clk->states);
 673         clk->domains = func->domains;
 674         clk->ustate_ac = -1;
 675         clk->ustate_dc = -1;
 676         clk->allow_reclock = allow_reclock;
 677
 678         INIT_WORK(&clk->work, nvkm_pstate_work);
 679         init_waitqueue_head(&clk->wait);
 680         atomic_set(&clk->waiting, 0);
 681
 682         /* If no pstates are provided, try and fetch them from the BIOS */
 683         if (!func->pstates) {
 684                 idx = 0;
 685                 do {
 686                         ret = nvkm_pstate_new(clk, idx++);
 687                 } while (ret == 0);
 688         } else {
 689                 for (idx = 0; idx < func->nr_pstates; idx++)
 690                         list_add_tail(&func->pstates[idx].head, &clk->states);
 691                 clk->state_nr = func->nr_pstates;
 692         }
 693
 694         ret = nvkm_notify_init(NULL, &device->event, nvkm_clk_pwrsrc, true,
 695                                NULL, 0, 0, &clk->pwrsrc_ntfy);
 696         if (ret)
 697                 return ret;
 698
 699         mode = nvkm_stropt(device->cfgopt, "NvClkMode", &arglen);
 700         if (mode) {
 701                 clk->ustate_ac = nvkm_clk_nstate(clk, mode, arglen);
 702                 clk->ustate_dc = nvkm_clk_nstate(clk, mode, arglen);
 703         }
 704
 705         mode = nvkm_stropt(device->cfgopt, "NvClkModeAC", &arglen);
 706         if (mode)
 707                 clk->ustate_ac = nvkm_clk_nstate(clk, mode, arglen);
 708
 709         mode = nvkm_stropt(device->cfgopt, "NvClkModeDC", &arglen);
 710         if (mode)
 711                 clk->ustate_dc = nvkm_clk_nstate(clk, mode, arglen);
 712
 713         clk->boost_mode = nvkm_longopt(device->cfgopt, "NvBoost",
 714                                        NVKM_CLK_BOOST_NONE);
 715         return 0;
 716 }
 717
 718 int
 719 nvkm_clk_new_(const struct nvkm_clk_func *func, struct nvkm_device *device,
 720               int index, bool allow_reclock, struct nvkm_clk **pclk)
 721 {
 722         if (!(*pclk = kzalloc(sizeof(**pclk), GFP_KERNEL)))
 723                 return -ENOMEM;
 724         return nvkm_clk_ctor(func, device, index, allow_reclock, *pclk);
 725 }