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 <core/client.h>
27 #include <core/option.h>
28 
29 #include <nvif/class.h>
30 #include <nvif/if0002.h>
31 #include <nvif/if0003.h>
32 #include <nvif/ioctl.h>
33 #include <nvif/unpack.h>
34 
35 static u8
36 nvkm_pm_count_perfdom(struct nvkm_pm *pm)
37 {
38 	struct nvkm_perfdom *dom;
39 	u8 domain_nr = 0;
40 
41 	list_for_each_entry(dom, &pm->domains, head)
42 		domain_nr++;
43 	return domain_nr;
44 }
45 
46 static u16
47 nvkm_perfdom_count_perfsig(struct nvkm_perfdom *dom)
48 {
49 	u16 signal_nr = 0;
50 	int i;
51 
52 	if (dom) {
53 		for (i = 0; i < dom->signal_nr; i++) {
54 			if (dom->signal[i].name)
55 				signal_nr++;
56 		}
57 	}
58 	return signal_nr;
59 }
60 
61 static struct nvkm_perfdom *
62 nvkm_perfdom_find(struct nvkm_pm *pm, int di)
63 {
64 	struct nvkm_perfdom *dom;
65 	int tmp = 0;
66 
67 	list_for_each_entry(dom, &pm->domains, head) {
68 		if (tmp++ == di)
69 			return dom;
70 	}
71 	return NULL;
72 }
73 
74 static struct nvkm_perfsig *
75 nvkm_perfsig_find(struct nvkm_pm *pm, u8 di, u8 si, struct nvkm_perfdom **pdom)
76 {
77 	struct nvkm_perfdom *dom = *pdom;
78 
79 	if (dom == NULL) {
80 		dom = nvkm_perfdom_find(pm, di);
81 		if (dom == NULL)
82 			return NULL;
83 		*pdom = dom;
84 	}
85 
86 	if (!dom->signal[si].name)
87 		return NULL;
88 	return &dom->signal[si];
89 }
90 
91 static u8
92 nvkm_perfsig_count_perfsrc(struct nvkm_perfsig *sig)
93 {
94 	u8 source_nr = 0, i;
95 
96 	for (i = 0; i < ARRAY_SIZE(sig->source); i++) {
97 		if (sig->source[i])
98 			source_nr++;
99 	}
100 	return source_nr;
101 }
102 
103 static struct nvkm_perfsrc *
104 nvkm_perfsrc_find(struct nvkm_pm *pm, struct nvkm_perfsig *sig, int si)
105 {
106 	struct nvkm_perfsrc *src;
107 	bool found = false;
108 	int tmp = 1; /* Sources ID start from 1 */
109 	u8 i;
110 
111 	for (i = 0; i < ARRAY_SIZE(sig->source) && sig->source[i]; i++) {
112 		if (sig->source[i] == si) {
113 			found = true;
114 			break;
115 		}
116 	}
117 
118 	if (found) {
119 		list_for_each_entry(src, &pm->sources, head) {
120 			if (tmp++ == si)
121 				return src;
122 		}
123 	}
124 
125 	return NULL;
126 }
127 
128 static int
129 nvkm_perfsrc_enable(struct nvkm_pm *pm, struct nvkm_perfctr *ctr)
130 {
131 	struct nvkm_subdev *subdev = &pm->engine.subdev;
132 	struct nvkm_device *device = subdev->device;
133 	struct nvkm_perfdom *dom = NULL;
134 	struct nvkm_perfsig *sig;
135 	struct nvkm_perfsrc *src;
136 	u32 mask, value;
137 	int i, j;
138 
139 	for (i = 0; i < 4; i++) {
140 		for (j = 0; j < 8 && ctr->source[i][j]; j++) {
141 			sig = nvkm_perfsig_find(pm, ctr->domain,
142 						ctr->signal[i], &dom);
143 			if (!sig)
144 				return -EINVAL;
145 
146 			src = nvkm_perfsrc_find(pm, sig, ctr->source[i][j]);
147 			if (!src)
148 				return -EINVAL;
149 
150 			/* set enable bit if needed */
151 			mask = value = 0x00000000;
152 			if (src->enable)
153 				mask = value = 0x80000000;
154 			mask  |= (src->mask << src->shift);
155 			value |= ((ctr->source[i][j] >> 32) << src->shift);
156 
157 			/* enable the source */
158 			nvkm_mask(device, src->addr, mask, value);
159 			nvkm_debug(subdev,
160 				   "enabled source %08x %08x %08x\n",
161 				   src->addr, mask, value);
162 		}
163 	}
164 	return 0;
165 }
166 
167 static int
168 nvkm_perfsrc_disable(struct nvkm_pm *pm, struct nvkm_perfctr *ctr)
169 {
170 	struct nvkm_subdev *subdev = &pm->engine.subdev;
171 	struct nvkm_device *device = subdev->device;
172 	struct nvkm_perfdom *dom = NULL;
173 	struct nvkm_perfsig *sig;
174 	struct nvkm_perfsrc *src;
175 	u32 mask;
176 	int i, j;
177 
178 	for (i = 0; i < 4; i++) {
179 		for (j = 0; j < 8 && ctr->source[i][j]; j++) {
180 			sig = nvkm_perfsig_find(pm, ctr->domain,
181 						ctr->signal[i], &dom);
182 			if (!sig)
183 				return -EINVAL;
184 
185 			src = nvkm_perfsrc_find(pm, sig, ctr->source[i][j]);
186 			if (!src)
187 				return -EINVAL;
188 
189 			/* unset enable bit if needed */
190 			mask = 0x00000000;
191 			if (src->enable)
192 				mask = 0x80000000;
193 			mask |= (src->mask << src->shift);
194 
195 			/* disable the source */
196 			nvkm_mask(device, src->addr, mask, 0);
197 			nvkm_debug(subdev, "disabled source %08x %08x\n",
198 				   src->addr, mask);
199 		}
200 	}
201 	return 0;
202 }
203 
204 /*******************************************************************************
205  * Perfdom object classes
206  ******************************************************************************/
207 static int
208 nvkm_perfdom_init(struct nvkm_perfdom *dom, void *data, u32 size)
209 {
210 	union {
211 		struct nvif_perfdom_init none;
212 	} *args = data;
213 	struct nvkm_object *object = &dom->object;
214 	struct nvkm_pm *pm = dom->perfmon->pm;
215 	int ret = -ENOSYS, i;
216 
217 	nvif_ioctl(object, "perfdom init size %d\n", size);
218 	if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
219 		nvif_ioctl(object, "perfdom init\n");
220 	} else
221 		return ret;
222 
223 	for (i = 0; i < 4; i++) {
224 		if (dom->ctr[i]) {
225 			dom->func->init(pm, dom, dom->ctr[i]);
226 
227 			/* enable sources */
228 			nvkm_perfsrc_enable(pm, dom->ctr[i]);
229 		}
230 	}
231 
232 	/* start next batch of counters for sampling */
233 	dom->func->next(pm, dom);
234 	return 0;
235 }
236 
237 static int
238 nvkm_perfdom_sample(struct nvkm_perfdom *dom, void *data, u32 size)
239 {
240 	union {
241 		struct nvif_perfdom_sample none;
242 	} *args = data;
243 	struct nvkm_object *object = &dom->object;
244 	struct nvkm_pm *pm = dom->perfmon->pm;
245 	int ret = -ENOSYS;
246 
247 	nvif_ioctl(object, "perfdom sample size %d\n", size);
248 	if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
249 		nvif_ioctl(object, "perfdom sample\n");
250 	} else
251 		return ret;
252 	pm->sequence++;
253 
254 	/* sample previous batch of counters */
255 	list_for_each_entry(dom, &pm->domains, head)
256 		dom->func->next(pm, dom);
257 
258 	return 0;
259 }
260 
261 static int
262 nvkm_perfdom_read(struct nvkm_perfdom *dom, void *data, u32 size)
263 {
264 	union {
265 		struct nvif_perfdom_read_v0 v0;
266 	} *args = data;
267 	struct nvkm_object *object = &dom->object;
268 	struct nvkm_pm *pm = dom->perfmon->pm;
269 	int ret = -ENOSYS, i;
270 
271 	nvif_ioctl(object, "perfdom read size %d\n", size);
272 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
273 		nvif_ioctl(object, "perfdom read vers %d\n", args->v0.version);
274 	} else
275 		return ret;
276 
277 	for (i = 0; i < 4; i++) {
278 		if (dom->ctr[i])
279 			dom->func->read(pm, dom, dom->ctr[i]);
280 	}
281 
282 	if (!dom->clk)
283 		return -EAGAIN;
284 
285 	for (i = 0; i < 4; i++)
286 		if (dom->ctr[i])
287 			args->v0.ctr[i] = dom->ctr[i]->ctr;
288 	args->v0.clk = dom->clk;
289 	return 0;
290 }
291 
292 static int
293 nvkm_perfdom_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
294 {
295 	struct nvkm_perfdom *dom = nvkm_perfdom(object);
296 	switch (mthd) {
297 	case NVIF_PERFDOM_V0_INIT:
298 		return nvkm_perfdom_init(dom, data, size);
299 	case NVIF_PERFDOM_V0_SAMPLE:
300 		return nvkm_perfdom_sample(dom, data, size);
301 	case NVIF_PERFDOM_V0_READ:
302 		return nvkm_perfdom_read(dom, data, size);
303 	default:
304 		break;
305 	}
306 	return -EINVAL;
307 }
308 
309 static void *
310 nvkm_perfdom_dtor(struct nvkm_object *object)
311 {
312 	struct nvkm_perfdom *dom = nvkm_perfdom(object);
313 	struct nvkm_pm *pm = dom->perfmon->pm;
314 	int i;
315 
316 	for (i = 0; i < 4; i++) {
317 		struct nvkm_perfctr *ctr = dom->ctr[i];
318 		if (ctr) {
319 			nvkm_perfsrc_disable(pm, ctr);
320 			if (ctr->head.next)
321 				list_del(&ctr->head);
322 		}
323 		kfree(ctr);
324 	}
325 
326 	return dom;
327 }
328 
329 static int
330 nvkm_perfctr_new(struct nvkm_perfdom *dom, int slot, u8 domain,
331 		 struct nvkm_perfsig *signal[4], u64 source[4][8],
332 		 u16 logic_op, struct nvkm_perfctr **pctr)
333 {
334 	struct nvkm_perfctr *ctr;
335 	int i, j;
336 
337 	if (!dom)
338 		return -EINVAL;
339 
340 	ctr = *pctr = kzalloc(sizeof(*ctr), GFP_KERNEL);
341 	if (!ctr)
342 		return -ENOMEM;
343 
344 	ctr->domain   = domain;
345 	ctr->logic_op = logic_op;
346 	ctr->slot     = slot;
347 	for (i = 0; i < 4; i++) {
348 		if (signal[i]) {
349 			ctr->signal[i] = signal[i] - dom->signal;
350 			for (j = 0; j < 8; j++)
351 				ctr->source[i][j] = source[i][j];
352 		}
353 	}
354 	list_add_tail(&ctr->head, &dom->list);
355 
356 	return 0;
357 }
358 
359 static const struct nvkm_object_func
360 nvkm_perfdom = {
361 	.dtor = nvkm_perfdom_dtor,
362 	.mthd = nvkm_perfdom_mthd,
363 };
364 
365 static int
366 nvkm_perfdom_new_(struct nvkm_perfmon *perfmon,
367 		  const struct nvkm_oclass *oclass, void *data, u32 size,
368 		  struct nvkm_object **pobject)
369 {
370 	union {
371 		struct nvif_perfdom_v0 v0;
372 	} *args = data;
373 	struct nvkm_pm *pm = perfmon->pm;
374 	struct nvkm_object *parent = oclass->parent;
375 	struct nvkm_perfdom *sdom = NULL;
376 	struct nvkm_perfctr *ctr[4] = {};
377 	struct nvkm_perfdom *dom;
378 	int c, s, m;
379 	int ret = -ENOSYS;
380 
381 	nvif_ioctl(parent, "create perfdom size %d\n", size);
382 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
383 		nvif_ioctl(parent, "create perfdom vers %d dom %d mode %02x\n",
384 			   args->v0.version, args->v0.domain, args->v0.mode);
385 	} else
386 		return ret;
387 
388 	for (c = 0; c < ARRAY_SIZE(args->v0.ctr); c++) {
389 		struct nvkm_perfsig *sig[4] = {};
390 		u64 src[4][8] = {};
391 
392 		for (s = 0; s < ARRAY_SIZE(args->v0.ctr[c].signal); s++) {
393 			sig[s] = nvkm_perfsig_find(pm, args->v0.domain,
394 						   args->v0.ctr[c].signal[s],
395 						   &sdom);
396 			if (args->v0.ctr[c].signal[s] && !sig[s])
397 				return -EINVAL;
398 
399 			for (m = 0; m < 8; m++) {
400 				src[s][m] = args->v0.ctr[c].source[s][m];
401 				if (src[s][m] && !nvkm_perfsrc_find(pm, sig[s],
402 							            src[s][m]))
403 					return -EINVAL;
404 			}
405 		}
406 
407 		ret = nvkm_perfctr_new(sdom, c, args->v0.domain, sig, src,
408 				       args->v0.ctr[c].logic_op, &ctr[c]);
409 		if (ret)
410 			return ret;
411 	}
412 
413 	if (!sdom)
414 		return -EINVAL;
415 
416 	if (!(dom = kzalloc(sizeof(*dom), GFP_KERNEL)))
417 		return -ENOMEM;
418 	nvkm_object_ctor(&nvkm_perfdom, oclass, &dom->object);
419 	dom->perfmon = perfmon;
420 	*pobject = &dom->object;
421 
422 	dom->func = sdom->func;
423 	dom->addr = sdom->addr;
424 	dom->mode = args->v0.mode;
425 	for (c = 0; c < ARRAY_SIZE(ctr); c++)
426 		dom->ctr[c] = ctr[c];
427 	return 0;
428 }
429 
430 /*******************************************************************************
431  * Perfmon object classes
432  ******************************************************************************/
433 static int
434 nvkm_perfmon_mthd_query_domain(struct nvkm_perfmon *perfmon,
435 			       void *data, u32 size)
436 {
437 	union {
438 		struct nvif_perfmon_query_domain_v0 v0;
439 	} *args = data;
440 	struct nvkm_object *object = &perfmon->object;
441 	struct nvkm_pm *pm = perfmon->pm;
442 	struct nvkm_perfdom *dom;
443 	u8 domain_nr;
444 	int di, ret = -ENOSYS;
445 
446 	nvif_ioctl(object, "perfmon query domain size %d\n", size);
447 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
448 		nvif_ioctl(object, "perfmon domain vers %d iter %02x\n",
449 			   args->v0.version, args->v0.iter);
450 		di = (args->v0.iter & 0xff) - 1;
451 	} else
452 		return ret;
453 
454 	domain_nr = nvkm_pm_count_perfdom(pm);
455 	if (di >= (int)domain_nr)
456 		return -EINVAL;
457 
458 	if (di >= 0) {
459 		dom = nvkm_perfdom_find(pm, di);
460 		if (dom == NULL)
461 			return -EINVAL;
462 
463 		args->v0.id         = di;
464 		args->v0.signal_nr  = nvkm_perfdom_count_perfsig(dom);
465 		strncpy(args->v0.name, dom->name, sizeof(args->v0.name) - 1);
466 
467 		/* Currently only global counters (PCOUNTER) are implemented
468 		 * but this will be different for local counters (MP). */
469 		args->v0.counter_nr = 4;
470 	}
471 
472 	if (++di < domain_nr) {
473 		args->v0.iter = ++di;
474 		return 0;
475 	}
476 
477 	args->v0.iter = 0xff;
478 	return 0;
479 }
480 
481 static int
482 nvkm_perfmon_mthd_query_signal(struct nvkm_perfmon *perfmon,
483 			       void *data, u32 size)
484 {
485 	union {
486 		struct nvif_perfmon_query_signal_v0 v0;
487 	} *args = data;
488 	struct nvkm_object *object = &perfmon->object;
489 	struct nvkm_pm *pm = perfmon->pm;
490 	struct nvkm_device *device = pm->engine.subdev.device;
491 	struct nvkm_perfdom *dom;
492 	struct nvkm_perfsig *sig;
493 	const bool all = nvkm_boolopt(device->cfgopt, "NvPmShowAll", false);
494 	const bool raw = nvkm_boolopt(device->cfgopt, "NvPmUnnamed", all);
495 	int ret = -ENOSYS, si;
496 
497 	nvif_ioctl(object, "perfmon query signal size %d\n", size);
498 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
499 		nvif_ioctl(object,
500 			   "perfmon query signal vers %d dom %d iter %04x\n",
501 			   args->v0.version, args->v0.domain, args->v0.iter);
502 		si = (args->v0.iter & 0xffff) - 1;
503 	} else
504 		return ret;
505 
506 	dom = nvkm_perfdom_find(pm, args->v0.domain);
507 	if (dom == NULL || si >= (int)dom->signal_nr)
508 		return -EINVAL;
509 
510 	if (si >= 0) {
511 		sig = &dom->signal[si];
512 		if (raw || !sig->name) {
513 			snprintf(args->v0.name, sizeof(args->v0.name),
514 				 "/%s/%02x", dom->name, si);
515 		} else {
516 			strncpy(args->v0.name, sig->name,
517 				sizeof(args->v0.name) - 1);
518 		}
519 
520 		args->v0.signal = si;
521 		args->v0.source_nr = nvkm_perfsig_count_perfsrc(sig);
522 	}
523 
524 	while (++si < dom->signal_nr) {
525 		if (all || dom->signal[si].name) {
526 			args->v0.iter = ++si;
527 			return 0;
528 		}
529 	}
530 
531 	args->v0.iter = 0xffff;
532 	return 0;
533 }
534 
535 static int
536 nvkm_perfmon_mthd_query_source(struct nvkm_perfmon *perfmon,
537 			       void *data, u32 size)
538 {
539 	union {
540 		struct nvif_perfmon_query_source_v0 v0;
541 	} *args = data;
542 	struct nvkm_object *object = &perfmon->object;
543 	struct nvkm_pm *pm = perfmon->pm;
544 	struct nvkm_perfdom *dom = NULL;
545 	struct nvkm_perfsig *sig;
546 	struct nvkm_perfsrc *src;
547 	u8 source_nr = 0;
548 	int si, ret = -ENOSYS;
549 
550 	nvif_ioctl(object, "perfmon query source size %d\n", size);
551 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
552 		nvif_ioctl(object,
553 			   "perfmon source vers %d dom %d sig %02x iter %02x\n",
554 			   args->v0.version, args->v0.domain, args->v0.signal,
555 			   args->v0.iter);
556 		si = (args->v0.iter & 0xff) - 1;
557 	} else
558 		return ret;
559 
560 	sig = nvkm_perfsig_find(pm, args->v0.domain, args->v0.signal, &dom);
561 	if (!sig)
562 		return -EINVAL;
563 
564 	source_nr = nvkm_perfsig_count_perfsrc(sig);
565 	if (si >= (int)source_nr)
566 		return -EINVAL;
567 
568 	if (si >= 0) {
569 		src = nvkm_perfsrc_find(pm, sig, sig->source[si]);
570 		if (!src)
571 			return -EINVAL;
572 
573 		args->v0.source = sig->source[si];
574 		args->v0.mask   = src->mask;
575 		strncpy(args->v0.name, src->name, sizeof(args->v0.name) - 1);
576 	}
577 
578 	if (++si < source_nr) {
579 		args->v0.iter = ++si;
580 		return 0;
581 	}
582 
583 	args->v0.iter = 0xff;
584 	return 0;
585 }
586 
587 static int
588 nvkm_perfmon_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
589 {
590 	struct nvkm_perfmon *perfmon = nvkm_perfmon(object);
591 	switch (mthd) {
592 	case NVIF_PERFMON_V0_QUERY_DOMAIN:
593 		return nvkm_perfmon_mthd_query_domain(perfmon, data, size);
594 	case NVIF_PERFMON_V0_QUERY_SIGNAL:
595 		return nvkm_perfmon_mthd_query_signal(perfmon, data, size);
596 	case NVIF_PERFMON_V0_QUERY_SOURCE:
597 		return nvkm_perfmon_mthd_query_source(perfmon, data, size);
598 	default:
599 		break;
600 	}
601 	return -EINVAL;
602 }
603 
604 static int
605 nvkm_perfmon_child_new(const struct nvkm_oclass *oclass, void *data, u32 size,
606 		       struct nvkm_object **pobject)
607 {
608 	struct nvkm_perfmon *perfmon = nvkm_perfmon(oclass->parent);
609 	return nvkm_perfdom_new_(perfmon, oclass, data, size, pobject);
610 }
611 
612 static int
613 nvkm_perfmon_child_get(struct nvkm_object *object, int index,
614 		       struct nvkm_oclass *oclass)
615 {
616 	if (index == 0) {
617 		oclass->base.oclass = NVIF_CLASS_PERFDOM;
618 		oclass->base.minver = 0;
619 		oclass->base.maxver = 0;
620 		oclass->ctor = nvkm_perfmon_child_new;
621 		return 0;
622 	}
623 	return -EINVAL;
624 }
625 
626 static void *
627 nvkm_perfmon_dtor(struct nvkm_object *object)
628 {
629 	struct nvkm_perfmon *perfmon = nvkm_perfmon(object);
630 	struct nvkm_pm *pm = perfmon->pm;
631 	mutex_lock(&pm->engine.subdev.mutex);
632 	if (pm->perfmon == &perfmon->object)
633 		pm->perfmon = NULL;
634 	mutex_unlock(&pm->engine.subdev.mutex);
635 	return perfmon;
636 }
637 
638 static const struct nvkm_object_func
639 nvkm_perfmon = {
640 	.dtor = nvkm_perfmon_dtor,
641 	.mthd = nvkm_perfmon_mthd,
642 	.sclass = nvkm_perfmon_child_get,
643 };
644 
645 static int
646 nvkm_perfmon_new(struct nvkm_pm *pm, const struct nvkm_oclass *oclass,
647 		 void *data, u32 size, struct nvkm_object **pobject)
648 {
649 	struct nvkm_perfmon *perfmon;
650 
651 	if (!(perfmon = kzalloc(sizeof(*perfmon), GFP_KERNEL)))
652 		return -ENOMEM;
653 	nvkm_object_ctor(&nvkm_perfmon, oclass, &perfmon->object);
654 	perfmon->pm = pm;
655 	*pobject = &perfmon->object;
656 	return 0;
657 }
658 
659 /*******************************************************************************
660  * PPM engine/subdev functions
661  ******************************************************************************/
662 
663 static int
664 nvkm_pm_oclass_new(struct nvkm_device *device, const struct nvkm_oclass *oclass,
665 		   void *data, u32 size, struct nvkm_object **pobject)
666 {
667 	struct nvkm_pm *pm = nvkm_pm(oclass->engine);
668 	int ret;
669 
670 	ret = nvkm_perfmon_new(pm, oclass, data, size, pobject);
671 	if (ret)
672 		return ret;
673 
674 	mutex_lock(&pm->engine.subdev.mutex);
675 	if (pm->perfmon == NULL)
676 		pm->perfmon = *pobject;
677 	ret = (pm->perfmon == *pobject) ? 0 : -EBUSY;
678 	mutex_unlock(&pm->engine.subdev.mutex);
679 	return ret;
680 }
681 
682 static const struct nvkm_device_oclass
683 nvkm_pm_oclass = {
684 	.base.oclass = NVIF_CLASS_PERFMON,
685 	.base.minver = -1,
686 	.base.maxver = -1,
687 	.ctor = nvkm_pm_oclass_new,
688 };
689 
690 static int
691 nvkm_pm_oclass_get(struct nvkm_oclass *oclass, int index,
692 		   const struct nvkm_device_oclass **class)
693 {
694 	if (index == 0) {
695 		oclass->base = nvkm_pm_oclass.base;
696 		*class = &nvkm_pm_oclass;
697 		return index;
698 	}
699 	return 1;
700 }
701 
702 static int
703 nvkm_perfsrc_new(struct nvkm_pm *pm, struct nvkm_perfsig *sig,
704 		 const struct nvkm_specsrc *spec)
705 {
706 	const struct nvkm_specsrc *ssrc;
707 	const struct nvkm_specmux *smux;
708 	struct nvkm_perfsrc *src;
709 	u8 source_nr = 0;
710 
711 	if (!spec) {
712 		/* No sources are defined for this signal. */
713 		return 0;
714 	}
715 
716 	ssrc = spec;
717 	while (ssrc->name) {
718 		smux = ssrc->mux;
719 		while (smux->name) {
720 			bool found = false;
721 			u8 source_id = 0;
722 			u32 len;
723 
724 			list_for_each_entry(src, &pm->sources, head) {
725 				if (src->addr == ssrc->addr &&
726 				    src->shift == smux->shift) {
727 					found = true;
728 					break;
729 				}
730 				source_id++;
731 			}
732 
733 			if (!found) {
734 				src = kzalloc(sizeof(*src), GFP_KERNEL);
735 				if (!src)
736 					return -ENOMEM;
737 
738 				src->addr   = ssrc->addr;
739 				src->mask   = smux->mask;
740 				src->shift  = smux->shift;
741 				src->enable = smux->enable;
742 
743 				len = strlen(ssrc->name) +
744 				      strlen(smux->name) + 2;
745 				src->name = kzalloc(len, GFP_KERNEL);
746 				if (!src->name) {
747 					kfree(src);
748 					return -ENOMEM;
749 				}
750 				snprintf(src->name, len, "%s_%s", ssrc->name,
751 					 smux->name);
752 
753 				list_add_tail(&src->head, &pm->sources);
754 			}
755 
756 			sig->source[source_nr++] = source_id + 1;
757 			smux++;
758 		}
759 		ssrc++;
760 	}
761 
762 	return 0;
763 }
764 
765 int
766 nvkm_perfdom_new(struct nvkm_pm *pm, const char *name, u32 mask,
767 		 u32 base, u32 size_unit, u32 size_domain,
768 		 const struct nvkm_specdom *spec)
769 {
770 	const struct nvkm_specdom *sdom;
771 	const struct nvkm_specsig *ssig;
772 	struct nvkm_perfdom *dom;
773 	int ret, i;
774 
775 	for (i = 0; i == 0 || mask; i++) {
776 		u32 addr = base + (i * size_unit);
777 		if (i && !(mask & (1 << i)))
778 			continue;
779 
780 		sdom = spec;
781 		while (sdom->signal_nr) {
782 			dom = kzalloc(struct_size(dom, signal, sdom->signal_nr),
783 				      GFP_KERNEL);
784 			if (!dom)
785 				return -ENOMEM;
786 
787 			if (mask) {
788 				snprintf(dom->name, sizeof(dom->name),
789 					 "%s/%02x/%02x", name, i,
790 					 (int)(sdom - spec));
791 			} else {
792 				snprintf(dom->name, sizeof(dom->name),
793 					 "%s/%02x", name, (int)(sdom - spec));
794 			}
795 
796 			list_add_tail(&dom->head, &pm->domains);
797 			INIT_LIST_HEAD(&dom->list);
798 			dom->func = sdom->func;
799 			dom->addr = addr;
800 			dom->signal_nr = sdom->signal_nr;
801 
802 			ssig = (sdom++)->signal;
803 			while (ssig->name) {
804 				struct nvkm_perfsig *sig =
805 					&dom->signal[ssig->signal];
806 				sig->name = ssig->name;
807 				ret = nvkm_perfsrc_new(pm, sig, ssig->source);
808 				if (ret)
809 					return ret;
810 				ssig++;
811 			}
812 
813 			addr += size_domain;
814 		}
815 
816 		mask &= ~(1 << i);
817 	}
818 
819 	return 0;
820 }
821 
822 static int
823 nvkm_pm_fini(struct nvkm_engine *engine, bool suspend)
824 {
825 	struct nvkm_pm *pm = nvkm_pm(engine);
826 	if (pm->func->fini)
827 		pm->func->fini(pm);
828 	return 0;
829 }
830 
831 static void *
832 nvkm_pm_dtor(struct nvkm_engine *engine)
833 {
834 	struct nvkm_pm *pm = nvkm_pm(engine);
835 	struct nvkm_perfdom *dom, *next_dom;
836 	struct nvkm_perfsrc *src, *next_src;
837 
838 	list_for_each_entry_safe(dom, next_dom, &pm->domains, head) {
839 		list_del(&dom->head);
840 		kfree(dom);
841 	}
842 
843 	list_for_each_entry_safe(src, next_src, &pm->sources, head) {
844 		list_del(&src->head);
845 		kfree(src->name);
846 		kfree(src);
847 	}
848 
849 	return pm;
850 }
851 
852 static const struct nvkm_engine_func
853 nvkm_pm = {
854 	.dtor = nvkm_pm_dtor,
855 	.fini = nvkm_pm_fini,
856 	.base.sclass = nvkm_pm_oclass_get,
857 };
858 
859 int
860 nvkm_pm_ctor(const struct nvkm_pm_func *func, struct nvkm_device *device,
861 	     int index, struct nvkm_pm *pm)
862 {
863 	pm->func = func;
864 	INIT_LIST_HEAD(&pm->domains);
865 	INIT_LIST_HEAD(&pm->sources);
866 	return nvkm_engine_ctor(&nvkm_pm, device, index, true, &pm->engine);
867 }
868