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                                 fallthrough;
  94                         case NVKM_CLK_BOOST_BIOS:
  95                                 if (clk->boost_khz && freq > clk->boost_khz)
  96                                         return false;
  97                         }
  98                 }
  99                 domain++;
 100         }
 101
 102         if (!volt)
 103                 return true;
 104
 105         voltage = nvkm_volt_map(volt, cstate->voltage, temp);
 106         if (voltage < 0)
 107                 return false;
 108         return voltage <= min(max_volt, volt->max_uv);
 109 }
 110
 111 static struct nvkm_cstate *
 112 nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
 113                       struct nvkm_cstate *cstate)
 114 {
 115         struct nvkm_device *device = clk->subdev.device;
 116         struct nvkm_volt *volt = device->volt;
 117         int max_volt;
 118
 119         if (!pstate || !cstate)
 120                 return NULL;
 121
 122         if (!volt)
 123                 return cstate;
 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         list_for_each_entry_from_reverse(cstate, &pstate->list, head) {
 137                 if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
 138                         break;
 139         }
 140
 141         return cstate;
 142 }
 143
 144 static struct nvkm_cstate *
 145 nvkm_cstate_get(struct nvkm_clk *clk, struct nvkm_pstate *pstate, int cstatei)
 146 {
 147         struct nvkm_cstate *cstate;
 148         if (cstatei == NVKM_CLK_CSTATE_HIGHEST)
 149                 return list_last_entry(&pstate->list, typeof(*cstate), head);
 150         else {
 151                 list_for_each_entry(cstate, &pstate->list, head) {
 152                         if (cstate->id == cstatei)
 153                                 return cstate;
 154                 }
 155         }
 156         return NULL;
 157 }
 158
 159 static int
 160 nvkm_cstate_prog(struct nvkm_clk *clk, struct nvkm_pstate *pstate, int cstatei)
 161 {
 162         struct nvkm_subdev *subdev = &clk->subdev;
 163         struct nvkm_device *device = subdev->device;
 164         struct nvkm_therm *therm = device->therm;
 165         struct nvkm_volt *volt = device->volt;
 166         struct nvkm_cstate *cstate;
 167         int ret;
 168
 169         if (!list_empty(&pstate->list)) {
 170                 cstate = nvkm_cstate_get(clk, pstate, cstatei);
 171                 cstate = nvkm_cstate_find_best(clk, pstate, cstate);
 172         } else {
 173                 cstate = &pstate->base;
 174         }
 175
 176         if (therm) {
 177                 ret = nvkm_therm_cstate(therm, pstate->fanspeed, +1);
 178                 if (ret && ret != -ENODEV) {
 179                         nvkm_error(subdev, "failed to raise fan speed: %d\n", ret);
 180                         return ret;
 181                 }
 182         }
 183
 184         if (volt) {
 185                 ret = nvkm_volt_set_id(volt, cstate->voltage,
 186                                        pstate->base.voltage, clk->temp, +1);
 187                 if (ret && ret != -ENODEV) {
 188                         nvkm_error(subdev, "failed to raise voltage: %d\n", ret);
 189                         return ret;
 190                 }
 191         }
 192
 193         ret = clk->func->calc(clk, cstate);
 194         if (ret == 0) {
 195                 ret = clk->func->prog(clk);
 196                 clk->func->tidy(clk);
 197         }
 198
 199         if (volt) {
 200                 ret = nvkm_volt_set_id(volt, cstate->voltage,
 201                                        pstate->base.voltage, clk->temp, -1);
 202                 if (ret && ret != -ENODEV)
 203                         nvkm_error(subdev, "failed to lower voltage: %d\n", ret);
 204         }
 205
 206         if (therm) {
 207                 ret = nvkm_therm_cstate(therm, pstate->fanspeed, -1);
 208                 if (ret && ret != -ENODEV)
 209                         nvkm_error(subdev, "failed to lower fan speed: %d\n", ret);
 210         }
 211
 212         return ret;
 213 }
 214
 215 static void
 216 nvkm_cstate_del(struct nvkm_cstate *cstate)
 217 {
 218         list_del(&cstate->head);
 219         kfree(cstate);
 220 }
 221
 222 static int
 223 nvkm_cstate_new(struct nvkm_clk *clk, int idx, struct nvkm_pstate *pstate)
 224 {
 225         struct nvkm_bios *bios = clk->subdev.device->bios;
 226         struct nvkm_volt *volt = clk->subdev.device->volt;
 227         const struct nvkm_domain *domain = clk->domains;
 228         struct nvkm_cstate *cstate = NULL;
 229         struct nvbios_cstepX cstepX;
 230         u8  ver, hdr;
 231         u32 data;
 232
 233         data = nvbios_cstepXp(bios, idx, &ver, &hdr, &cstepX);
 234         if (!data)
 235                 return -ENOENT;
 236
 237         if (volt && nvkm_volt_map_min(volt, cstepX.voltage) > volt->max_uv)
 238                 return -EINVAL;
 239
 240         cstate = kzalloc(sizeof(*cstate), GFP_KERNEL);
 241         if (!cstate)
 242                 return -ENOMEM;
 243
 244         *cstate = pstate->base;
 245         cstate->voltage = cstepX.voltage;
 246         cstate->id = idx;
 247
 248         while (domain && domain->name != nv_clk_src_max) {
 249                 if (domain->flags & NVKM_CLK_DOM_FLAG_CORE) {
 250                         u32 freq = nvkm_clk_adjust(clk, true, pstate->pstate,
 251                                                    domain->bios, cstepX.freq);
 252                         cstate->domain[domain->name] = freq;
 253                 }
 254                 domain++;
 255         }
 256
 257         list_add(&cstate->head, &pstate->list);
 258         return 0;
 259 }
 260
 261 /******************************************************************************
 262  * P-States
 263  *****************************************************************************/
 264 static int
 265 nvkm_pstate_prog(struct nvkm_clk *clk, int pstatei)
 266 {
 267         struct nvkm_subdev *subdev = &clk->subdev;
 268         struct nvkm_fb *fb = subdev->device->fb;
 269         struct nvkm_pci *pci = subdev->device->pci;
 270         struct nvkm_pstate *pstate;
 271         int ret, idx = 0;
 272
 273         list_for_each_entry(pstate, &clk->states, head) {
 274                 if (idx++ == pstatei)
 275                         break;
 276         }
 277
 278         nvkm_debug(subdev, "setting performance state %d\n", pstatei);
 279         clk->pstate = pstatei;
 280
 281         nvkm_pcie_set_link(pci, pstate->pcie_speed, pstate->pcie_width);
 282
 283         if (fb && fb->ram && fb->ram->func->calc) {
 284                 struct nvkm_ram *ram = fb->ram;
 285                 int khz = pstate->base.domain[nv_clk_src_mem];
 286                 do {
 287                         ret = ram->func->calc(ram, khz);
 288                         if (ret == 0)
 289                                 ret = ram->func->prog(ram);
 290                 } while (ret > 0);
 291                 ram->func->tidy(ram);
 292         }
 293
 294         return nvkm_cstate_prog(clk, pstate, NVKM_CLK_CSTATE_HIGHEST);
 295 }
 296
 297 static void
 298 nvkm_pstate_work(struct work_struct *work)
 299 {
 300         struct nvkm_clk *clk = container_of(work, typeof(*clk), work);
 301         struct nvkm_subdev *subdev = &clk->subdev;
 302         int pstate;
 303
 304         if (!atomic_xchg(&clk->waiting, 0))
 305                 return;
 306         clk->pwrsrc = power_supply_is_system_supplied();
 307
 308         nvkm_trace(subdev, "P %d PWR %d U(AC) %d U(DC) %d A %d T %d°C D %d\n",
 309                    clk->pstate, clk->pwrsrc, clk->ustate_ac, clk->ustate_dc,
 310                    clk->astate, clk->temp, clk->dstate);
 311
 312         pstate = clk->pwrsrc ? clk->ustate_ac : clk->ustate_dc;
 313         if (clk->state_nr && pstate != -1) {
 314                 pstate = (pstate < 0) ? clk->astate : pstate;
 315                 pstate = min(pstate, clk->state_nr - 1);
 316                 pstate = max(pstate, clk->dstate);
 317         } else {
 318                 pstate = clk->pstate = -1;
 319         }
 320
 321         nvkm_trace(subdev, "-> %d\n", pstate);
 322         if (pstate != clk->pstate) {
 323                 int ret = nvkm_pstate_prog(clk, pstate);
 324                 if (ret) {
 325                         nvkm_error(subdev, "error setting pstate %d: %d\n",
 326                                    pstate, ret);
 327                 }
 328         }
 329
 330         wake_up_all(&clk->wait);
 331         nvkm_notify_get(&clk->pwrsrc_ntfy);
 332 }
 333
 334 static int
 335 nvkm_pstate_calc(struct nvkm_clk *clk, bool wait)
 336 {
 337         atomic_set(&clk->waiting, 1);
 338         schedule_work(&clk->work);
 339         if (wait)
 340                 wait_event(clk->wait, !atomic_read(&clk->waiting));
 341         return 0;
 342 }
 343
 344 static void
 345 nvkm_pstate_info(struct nvkm_clk *clk, struct nvkm_pstate *pstate)
 346 {
 347         const struct nvkm_domain *clock = clk->domains - 1;
 348         struct nvkm_cstate *cstate;
 349         struct nvkm_subdev *subdev = &clk->subdev;
 350         char info[3][32] = { "", "", "" };
 351         char name[4] = "--";
 352         int i = -1;
 353
 354         if (pstate->pstate != 0xff)
 355                 snprintf(name, sizeof(name), "%02x", pstate->pstate);
 356
 357         while ((++clock)->name != nv_clk_src_max) {
 358                 u32 lo = pstate->base.domain[clock->name];
 359                 u32 hi = lo;
 360                 if (hi == 0)
 361                         continue;
 362
 363                 nvkm_debug(subdev, "%02x: %10d KHz\n", clock->name, lo);
 364                 list_for_each_entry(cstate, &pstate->list, head) {
 365                         u32 freq = cstate->domain[clock->name];
 366                         lo = min(lo, freq);
 367                         hi = max(hi, freq);
 368                         nvkm_debug(subdev, "%10d KHz\n", freq);
 369                 }
 370
 371                 if (clock->mname && ++i < ARRAY_SIZE(info)) {
 372                         lo /= clock->mdiv;
 373                         hi /= clock->mdiv;
 374                         if (lo == hi) {
 375                                 snprintf(info[i], sizeof(info[i]), "%s %d MHz",
 376                                          clock->mname, lo);
 377                         } else {
 378                                 snprintf(info[i], sizeof(info[i]),
 379                                          "%s %d-%d MHz", clock->mname, lo, hi);
 380                         }
 381                 }
 382         }
 383
 384         nvkm_debug(subdev, "%s: %s %s %s\n", name, info[0], info[1], info[2]);
 385 }
 386
 387 static void
 388 nvkm_pstate_del(struct nvkm_pstate *pstate)
 389 {
 390         struct nvkm_cstate *cstate, *temp;
 391
 392         list_for_each_entry_safe(cstate, temp, &pstate->list, head) {
 393                 nvkm_cstate_del(cstate);
 394         }
 395
 396         list_del(&pstate->head);
 397         kfree(pstate);
 398 }
 399
 400 static int
 401 nvkm_pstate_new(struct nvkm_clk *clk, int idx)
 402 {
 403         struct nvkm_bios *bios = clk->subdev.device->bios;
 404         const struct nvkm_domain *domain = clk->domains - 1;
 405         struct nvkm_pstate *pstate;
 406         struct nvkm_cstate *cstate;
 407         struct nvbios_cstepE cstepE;
 408         struct nvbios_perfE perfE;
 409         u8  ver, hdr, cnt, len;
 410         u32 data;
 411
 412         data = nvbios_perfEp(bios, idx, &ver, &hdr, &cnt, &len, &perfE);
 413         if (!data)
 414                 return -EINVAL;
 415         if (perfE.pstate == 0xff)
 416                 return 0;
 417
 418         pstate = kzalloc(sizeof(*pstate), GFP_KERNEL);
 419         cstate = &pstate->base;
 420         if (!pstate)
 421                 return -ENOMEM;
 422
 423         INIT_LIST_HEAD(&pstate->list);
 424
 425         pstate->pstate = perfE.pstate;
 426         pstate->fanspeed = perfE.fanspeed;
 427         pstate->pcie_speed = perfE.pcie_speed;
 428         pstate->pcie_width = perfE.pcie_width;
 429         cstate->voltage = perfE.voltage;
 430         cstate->domain[nv_clk_src_core] = perfE.core;
 431         cstate->domain[nv_clk_src_shader] = perfE.shader;
 432         cstate->domain[nv_clk_src_mem] = perfE.memory;
 433         cstate->domain[nv_clk_src_vdec] = perfE.vdec;
 434         cstate->domain[nv_clk_src_dom6] = perfE.disp;
 435
 436         while (ver >= 0x40 && (++domain)->name != nv_clk_src_max) {
 437                 struct nvbios_perfS perfS;
 438                 u8  sver = ver, shdr = hdr;
 439                 u32 perfSe = nvbios_perfSp(bios, data, domain->bios,
 440                                           &sver, &shdr, cnt, len, &perfS);
 441                 if (perfSe == 0 || sver != 0x40)
 442                         continue;
 443
 444                 if (domain->flags & NVKM_CLK_DOM_FLAG_CORE) {
 445                         perfS.v40.freq = nvkm_clk_adjust(clk, false,
 446                                                          pstate->pstate,
 447                                                          domain->bios,
 448                                                          perfS.v40.freq);
 449                 }
 450
 451                 cstate->domain[domain->name] = perfS.v40.freq;
 452         }
 453
 454         data = nvbios_cstepEm(bios, pstate->pstate, &ver, &hdr, &cstepE);
 455         if (data) {
 456                 int idx = cstepE.index;
 457                 do {
 458                         nvkm_cstate_new(clk, idx, pstate);
 459                 } while(idx--);
 460         }
 461
 462         nvkm_pstate_info(clk, pstate);
 463         list_add_tail(&pstate->head, &clk->states);
 464         clk->state_nr++;
 465         return 0;
 466 }
 467
 468 /******************************************************************************
 469  * Adjustment triggers
 470  *****************************************************************************/
 471 static int
 472 nvkm_clk_ustate_update(struct nvkm_clk *clk, int req)
 473 {
 474         struct nvkm_pstate *pstate;
 475         int i = 0;
 476
 477         if (!clk->allow_reclock)
 478                 return -ENOSYS;
 479
 480         if (req != -1 && req != -2) {
 481                 list_for_each_entry(pstate, &clk->states, head) {
 482                         if (pstate->pstate == req)
 483                                 break;
 484                         i++;
 485                 }
 486
 487                 if (pstate->pstate != req)
 488                         return -EINVAL;
 489                 req = i;
 490         }
 491
 492         return req + 2;
 493 }
 494
 495 static int
 496 nvkm_clk_nstate(struct nvkm_clk *clk, const char *mode, int arglen)
 497 {
 498         int ret = 1;
 499
 500         if (clk->allow_reclock && !strncasecmpz(mode, "auto", arglen))
 501                 return -2;
 502
 503         if (strncasecmpz(mode, "disabled", arglen)) {
 504                 char save = mode[arglen];
 505                 long v;
 506
 507                 ((char *)mode)[arglen] = '\0';
 508                 if (!kstrtol(mode, 0, &v)) {
 509                         ret = nvkm_clk_ustate_update(clk, v);
 510                         if (ret < 0)
 511                                 ret = 1;
 512                 }
 513                 ((char *)mode)[arglen] = save;
 514         }
 515
 516         return ret - 2;
 517 }
 518
 519 int
 520 nvkm_clk_ustate(struct nvkm_clk *clk, int req, int pwr)
 521 {
 522         int ret = nvkm_clk_ustate_update(clk, req);
 523         if (ret >= 0) {
 524                 if (ret -= 2, pwr) clk->ustate_ac = ret;
 525                 else               clk->ustate_dc = ret;
 526                 return nvkm_pstate_calc(clk, true);
 527         }
 528         return ret;
 529 }
 530
 531 int
 532 nvkm_clk_astate(struct nvkm_clk *clk, int req, int rel, bool wait)
 533 {
 534         if (!rel) clk->astate  = req;
 535         if ( rel) clk->astate += rel;
 536         clk->astate = min(clk->astate, clk->state_nr - 1);
 537         clk->astate = max(clk->astate, 0);
 538         return nvkm_pstate_calc(clk, wait);
 539 }
 540
 541 int
 542 nvkm_clk_tstate(struct nvkm_clk *clk, u8 temp)
 543 {
 544         if (clk->temp == temp)
 545                 return 0;
 546         clk->temp = temp;
 547         return nvkm_pstate_calc(clk, false);
 548 }
 549
 550 int
 551 nvkm_clk_dstate(struct nvkm_clk *clk, int req, int rel)
 552 {
 553         if (!rel) clk->dstate  = req;
 554         if ( rel) clk->dstate += rel;
 555         clk->dstate = min(clk->dstate, clk->state_nr - 1);
 556         clk->dstate = max(clk->dstate, 0);
 557         return nvkm_pstate_calc(clk, true);
 558 }
 559
 560 static int
 561 nvkm_clk_pwrsrc(struct nvkm_notify *notify)
 562 {
 563         struct nvkm_clk *clk =
 564                 container_of(notify, typeof(*clk), pwrsrc_ntfy);
 565         nvkm_pstate_calc(clk, false);
 566         return NVKM_NOTIFY_DROP;
 567 }
 568
 569 /******************************************************************************
 570  * subdev base class implementation
 571  *****************************************************************************/
 572
 573 int
 574 nvkm_clk_read(struct nvkm_clk *clk, enum nv_clk_src src)
 575 {
 576         return clk->func->read(clk, src);
 577 }
 578
 579 static int
 580 nvkm_clk_fini(struct nvkm_subdev *subdev, bool suspend)
 581 {
 582         struct nvkm_clk *clk = nvkm_clk(subdev);
 583         nvkm_notify_put(&clk->pwrsrc_ntfy);
 584         flush_work(&clk->work);
 585         if (clk->func->fini)
 586                 clk->func->fini(clk);
 587         return 0;
 588 }
 589
 590 static int
 591 nvkm_clk_init(struct nvkm_subdev *subdev)
 592 {
 593         struct nvkm_clk *clk = nvkm_clk(subdev);
 594         const struct nvkm_domain *clock = clk->domains;
 595         int ret;
 596
 597         memset(&clk->bstate, 0x00, sizeof(clk->bstate));
 598         INIT_LIST_HEAD(&clk->bstate.list);
 599         clk->bstate.pstate = 0xff;
 600
 601         while (clock->name != nv_clk_src_max) {
 602                 ret = nvkm_clk_read(clk, clock->name);
 603                 if (ret < 0) {
 604                         nvkm_error(subdev, "%02x freq unknown\n", clock->name);
 605                         return ret;
 606                 }
 607                 clk->bstate.base.domain[clock->name] = ret;
 608                 clock++;
 609         }
 610
 611         nvkm_pstate_info(clk, &clk->bstate);
 612
 613         if (clk->func->init)
 614                 return clk->func->init(clk);
 615
 616         clk->astate = clk->state_nr - 1;
 617         clk->dstate = 0;
 618         clk->pstate = -1;
 619         clk->temp = 90; /* reasonable default value */
 620         nvkm_pstate_calc(clk, true);
 621         return 0;
 622 }
 623
 624 static void *
 625 nvkm_clk_dtor(struct nvkm_subdev *subdev)
 626 {
 627         struct nvkm_clk *clk = nvkm_clk(subdev);
 628         struct nvkm_pstate *pstate, *temp;
 629
 630         nvkm_notify_fini(&clk->pwrsrc_ntfy);
 631
 632         /* Early return if the pstates have been provided statically */
 633         if (clk->func->pstates)
 634                 return clk;
 635
 636         list_for_each_entry_safe(pstate, temp, &clk->states, head) {
 637                 nvkm_pstate_del(pstate);
 638         }
 639
 640         return clk;
 641 }
 642
 643 static const struct nvkm_subdev_func
 644 nvkm_clk = {
 645         .dtor = nvkm_clk_dtor,
 646         .init = nvkm_clk_init,
 647         .fini = nvkm_clk_fini,
 648 };
 649
 650 int
 651 nvkm_clk_ctor(const struct nvkm_clk_func *func, struct nvkm_device *device,
 652               int index, bool allow_reclock, struct nvkm_clk *clk)
 653 {
 654         struct nvkm_subdev *subdev = &clk->subdev;
 655         struct nvkm_bios *bios = device->bios;
 656         int ret, idx, arglen;
 657         const char *mode;
 658         struct nvbios_vpstate_header h;
 659
 660         nvkm_subdev_ctor(&nvkm_clk, device, index, subdev);
 661
 662         if (bios && !nvbios_vpstate_parse(bios, &h)) {
 663                 struct nvbios_vpstate_entry base, boost;
 664                 if (!nvbios_vpstate_entry(bios, &h, h.boost_id, &boost))
 665                         clk->boost_khz = boost.clock_mhz * 1000;
 666                 if (!nvbios_vpstate_entry(bios, &h, h.base_id, &base))
 667                         clk->base_khz = base.clock_mhz * 1000;
 668         }
 669
 670         clk->func = func;
 671         INIT_LIST_HEAD(&clk->states);
 672         clk->domains = func->domains;
 673         clk->ustate_ac = -1;
 674         clk->ustate_dc = -1;
 675         clk->allow_reclock = allow_reclock;
 676
 677         INIT_WORK(&clk->work, nvkm_pstate_work);
 678         init_waitqueue_head(&clk->wait);
 679         atomic_set(&clk->waiting, 0);
 680
 681         /* If no pstates are provided, try and fetch them from the BIOS */
 682         if (!func->pstates) {
 683                 idx = 0;
 684                 do {
 685                         ret = nvkm_pstate_new(clk, idx++);
 686                 } while (ret == 0);
 687         } else {
 688                 for (idx = 0; idx < func->nr_pstates; idx++)
 689                         list_add_tail(&func->pstates[idx].head, &clk->states);
 690                 clk->state_nr = func->nr_pstates;
 691         }
 692
 693         ret = nvkm_notify_init(NULL, &device->event, nvkm_clk_pwrsrc, true,
 694                                NULL, 0, 0, &clk->pwrsrc_ntfy);
 695         if (ret)
 696                 return ret;
 697
 698         mode = nvkm_stropt(device->cfgopt, "NvClkMode", &arglen);
 699         if (mode) {
 700                 clk->ustate_ac = nvkm_clk_nstate(clk, mode, arglen);
 701                 clk->ustate_dc = nvkm_clk_nstate(clk, mode, arglen);
 702         }
 703
 704         mode = nvkm_stropt(device->cfgopt, "NvClkModeAC", &arglen);
 705         if (mode)
 706                 clk->ustate_ac = nvkm_clk_nstate(clk, mode, arglen);
 707
 708         mode = nvkm_stropt(device->cfgopt, "NvClkModeDC", &arglen);
 709         if (mode)
 710                 clk->ustate_dc = nvkm_clk_nstate(clk, mode, arglen);
 711
 712         clk->boost_mode = nvkm_longopt(device->cfgopt, "NvBoost",
 713                                        NVKM_CLK_BOOST_NONE);
 714         return 0;
 715 }
 716
 717 int
 718 nvkm_clk_new_(const struct nvkm_clk_func *func, struct nvkm_device *device,
 719               int index, bool allow_reclock, struct nvkm_clk **pclk)
 720 {
 721         if (!(*pclk = kzalloc(sizeof(**pclk), GFP_KERNEL)))
 722                 return -ENOMEM;
 723         return nvkm_clk_ctor(func, device, index, allow_reclock, *pclk);
 724 }