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
nvkm_clk_adjust(struct nvkm_clk * clk,bool adjust,u8 pstate,u8 domain,u32 input)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
nvkm_cstate_valid(struct nvkm_clk * clk,struct nvkm_cstate * cstate,u32 max_volt,int temp)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 *
nvkm_cstate_find_best(struct nvkm_clk * clk,struct nvkm_pstate * pstate,struct nvkm_cstate * 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 *
nvkm_cstate_get(struct nvkm_clk * clk,struct nvkm_pstate * pstate,int cstatei)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
nvkm_cstate_prog(struct nvkm_clk * clk,struct nvkm_pstate * pstate,int cstatei)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
nvkm_cstate_del(struct nvkm_cstate * cstate)216 nvkm_cstate_del(struct nvkm_cstate *cstate)
217 {
218 list_del(&cstate->head);
219 kfree(cstate);
220 }
221
222 static int
nvkm_cstate_new(struct nvkm_clk * clk,int idx,struct nvkm_pstate * pstate)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
nvkm_pstate_prog(struct nvkm_clk * clk,int pstatei)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
nvkm_pstate_work(struct work_struct * work)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
nvkm_pstate_calc(struct nvkm_clk * clk,bool wait)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
nvkm_pstate_info(struct nvkm_clk * clk,struct nvkm_pstate * pstate)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
nvkm_pstate_del(struct nvkm_pstate * pstate)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
nvkm_pstate_new(struct nvkm_clk * clk,int idx)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
nvkm_clk_ustate_update(struct nvkm_clk * clk,int req)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
nvkm_clk_nstate(struct nvkm_clk * clk,const char * mode,int arglen)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
nvkm_clk_ustate(struct nvkm_clk * clk,int req,int pwr)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
nvkm_clk_astate(struct nvkm_clk * clk,int req,int rel,bool wait)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
nvkm_clk_tstate(struct nvkm_clk * clk,u8 temp)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
nvkm_clk_dstate(struct nvkm_clk * clk,int req,int rel)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
nvkm_clk_pwrsrc(struct nvkm_notify * notify)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
nvkm_clk_read(struct nvkm_clk * clk,enum nv_clk_src src)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
nvkm_clk_fini(struct nvkm_subdev * subdev,bool suspend)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
nvkm_clk_init(struct nvkm_subdev * subdev)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 *
nvkm_clk_dtor(struct nvkm_subdev * subdev)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
nvkm_clk_ctor(const struct nvkm_clk_func * func,struct nvkm_device * device,int index,bool allow_reclock,struct nvkm_clk * clk)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
nvkm_clk_new_(const struct nvkm_clk_func * func,struct nvkm_device * device,int index,bool allow_reclock,struct nvkm_clk ** pclk)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 }
725
