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8#define pr_fmt(fmt) "SCMI Notifications PERF - " fmt
9
10#include <linux/bits.h>
11#include <linux/of.h>
12#include <linux/io.h>
13#include <linux/io-64-nonatomic-hi-lo.h>
14#include <linux/platform_device.h>
15#include <linux/pm_opp.h>
16#include <linux/scmi_protocol.h>
17#include <linux/sort.h>
18
19#include "common.h"
20#include "notify.h"
21
22enum scmi_performance_protocol_cmd {
23 PERF_DOMAIN_ATTRIBUTES = 0x3,
24 PERF_DESCRIBE_LEVELS = 0x4,
25 PERF_LIMITS_SET = 0x5,
26 PERF_LIMITS_GET = 0x6,
27 PERF_LEVEL_SET = 0x7,
28 PERF_LEVEL_GET = 0x8,
29 PERF_NOTIFY_LIMITS = 0x9,
30 PERF_NOTIFY_LEVEL = 0xa,
31 PERF_DESCRIBE_FASTCHANNEL = 0xb,
32};
33
34struct scmi_opp {
35 u32 perf;
36 u32 power;
37 u32 trans_latency_us;
38};
39
40struct scmi_msg_resp_perf_attributes {
41 __le16 num_domains;
42 __le16 flags;
43#define POWER_SCALE_IN_MILLIWATT(x) ((x) & BIT(0))
44 __le32 stats_addr_low;
45 __le32 stats_addr_high;
46 __le32 stats_size;
47};
48
49struct scmi_msg_resp_perf_domain_attributes {
50 __le32 flags;
51#define SUPPORTS_SET_LIMITS(x) ((x) & BIT(31))
52#define SUPPORTS_SET_PERF_LVL(x) ((x) & BIT(30))
53#define SUPPORTS_PERF_LIMIT_NOTIFY(x) ((x) & BIT(29))
54#define SUPPORTS_PERF_LEVEL_NOTIFY(x) ((x) & BIT(28))
55#define SUPPORTS_PERF_FASTCHANNELS(x) ((x) & BIT(27))
56 __le32 rate_limit_us;
57 __le32 sustained_freq_khz;
58 __le32 sustained_perf_level;
59 u8 name[SCMI_MAX_STR_SIZE];
60};
61
62struct scmi_msg_perf_describe_levels {
63 __le32 domain;
64 __le32 level_index;
65};
66
67struct scmi_perf_set_limits {
68 __le32 domain;
69 __le32 max_level;
70 __le32 min_level;
71};
72
73struct scmi_perf_get_limits {
74 __le32 max_level;
75 __le32 min_level;
76};
77
78struct scmi_perf_set_level {
79 __le32 domain;
80 __le32 level;
81};
82
83struct scmi_perf_notify_level_or_limits {
84 __le32 domain;
85 __le32 notify_enable;
86};
87
88struct scmi_perf_limits_notify_payld {
89 __le32 agent_id;
90 __le32 domain_id;
91 __le32 range_max;
92 __le32 range_min;
93};
94
95struct scmi_perf_level_notify_payld {
96 __le32 agent_id;
97 __le32 domain_id;
98 __le32 performance_level;
99};
100
101struct scmi_msg_resp_perf_describe_levels {
102 __le16 num_returned;
103 __le16 num_remaining;
104 struct {
105 __le32 perf_val;
106 __le32 power;
107 __le16 transition_latency_us;
108 __le16 reserved;
109 } opp[];
110};
111
112struct scmi_perf_get_fc_info {
113 __le32 domain;
114 __le32 message_id;
115};
116
117struct scmi_msg_resp_perf_desc_fc {
118 __le32 attr;
119#define SUPPORTS_DOORBELL(x) ((x) & BIT(0))
120#define DOORBELL_REG_WIDTH(x) FIELD_GET(GENMASK(2, 1), (x))
121 __le32 rate_limit;
122 __le32 chan_addr_low;
123 __le32 chan_addr_high;
124 __le32 chan_size;
125 __le32 db_addr_low;
126 __le32 db_addr_high;
127 __le32 db_set_lmask;
128 __le32 db_set_hmask;
129 __le32 db_preserve_lmask;
130 __le32 db_preserve_hmask;
131};
132
133struct scmi_fc_db_info {
134 int width;
135 u64 set;
136 u64 mask;
137 void __iomem *addr;
138};
139
140struct scmi_fc_info {
141 void __iomem *level_set_addr;
142 void __iomem *limit_set_addr;
143 void __iomem *level_get_addr;
144 void __iomem *limit_get_addr;
145 struct scmi_fc_db_info *level_set_db;
146 struct scmi_fc_db_info *limit_set_db;
147};
148
149struct perf_dom_info {
150 bool set_limits;
151 bool set_perf;
152 bool perf_limit_notify;
153 bool perf_level_notify;
154 bool perf_fastchannels;
155 u32 opp_count;
156 u32 sustained_freq_khz;
157 u32 sustained_perf_level;
158 u32 mult_factor;
159 char name[SCMI_MAX_STR_SIZE];
160 struct scmi_opp opp[MAX_OPPS];
161 struct scmi_fc_info *fc_info;
162};
163
164struct scmi_perf_info {
165 u32 version;
166 int num_domains;
167 bool power_scale_mw;
168 u64 stats_addr;
169 u32 stats_size;
170 struct perf_dom_info *dom_info;
171};
172
173static enum scmi_performance_protocol_cmd evt_2_cmd[] = {
174 PERF_NOTIFY_LIMITS,
175 PERF_NOTIFY_LEVEL,
176};
177
178static int scmi_perf_attributes_get(const struct scmi_handle *handle,
179 struct scmi_perf_info *pi)
180{
181 int ret;
182 struct scmi_xfer *t;
183 struct scmi_msg_resp_perf_attributes *attr;
184
185 ret = scmi_xfer_get_init(handle, PROTOCOL_ATTRIBUTES,
186 SCMI_PROTOCOL_PERF, 0, sizeof(*attr), &t);
187 if (ret)
188 return ret;
189
190 attr = t->rx.buf;
191
192 ret = scmi_do_xfer(handle, t);
193 if (!ret) {
194 u16 flags = le16_to_cpu(attr->flags);
195
196 pi->num_domains = le16_to_cpu(attr->num_domains);
197 pi->power_scale_mw = POWER_SCALE_IN_MILLIWATT(flags);
198 pi->stats_addr = le32_to_cpu(attr->stats_addr_low) |
199 (u64)le32_to_cpu(attr->stats_addr_high) << 32;
200 pi->stats_size = le32_to_cpu(attr->stats_size);
201 }
202
203 scmi_xfer_put(handle, t);
204 return ret;
205}
206
207static int
208scmi_perf_domain_attributes_get(const struct scmi_handle *handle, u32 domain,
209 struct perf_dom_info *dom_info)
210{
211 int ret;
212 struct scmi_xfer *t;
213 struct scmi_msg_resp_perf_domain_attributes *attr;
214
215 ret = scmi_xfer_get_init(handle, PERF_DOMAIN_ATTRIBUTES,
216 SCMI_PROTOCOL_PERF, sizeof(domain),
217 sizeof(*attr), &t);
218 if (ret)
219 return ret;
220
221 put_unaligned_le32(domain, t->tx.buf);
222 attr = t->rx.buf;
223
224 ret = scmi_do_xfer(handle, t);
225 if (!ret) {
226 u32 flags = le32_to_cpu(attr->flags);
227
228 dom_info->set_limits = SUPPORTS_SET_LIMITS(flags);
229 dom_info->set_perf = SUPPORTS_SET_PERF_LVL(flags);
230 dom_info->perf_limit_notify = SUPPORTS_PERF_LIMIT_NOTIFY(flags);
231 dom_info->perf_level_notify = SUPPORTS_PERF_LEVEL_NOTIFY(flags);
232 dom_info->perf_fastchannels = SUPPORTS_PERF_FASTCHANNELS(flags);
233 dom_info->sustained_freq_khz =
234 le32_to_cpu(attr->sustained_freq_khz);
235 dom_info->sustained_perf_level =
236 le32_to_cpu(attr->sustained_perf_level);
237 if (!dom_info->sustained_freq_khz ||
238 !dom_info->sustained_perf_level)
239
240 dom_info->mult_factor = 1000;
241 else
242 dom_info->mult_factor =
243 (dom_info->sustained_freq_khz * 1000) /
244 dom_info->sustained_perf_level;
245 strlcpy(dom_info->name, attr->name, SCMI_MAX_STR_SIZE);
246 }
247
248 scmi_xfer_put(handle, t);
249 return ret;
250}
251
252static int opp_cmp_func(const void *opp1, const void *opp2)
253{
254 const struct scmi_opp *t1 = opp1, *t2 = opp2;
255
256 return t1->perf - t2->perf;
257}
258
259static int
260scmi_perf_describe_levels_get(const struct scmi_handle *handle, u32 domain,
261 struct perf_dom_info *perf_dom)
262{
263 int ret, cnt;
264 u32 tot_opp_cnt = 0;
265 u16 num_returned, num_remaining;
266 struct scmi_xfer *t;
267 struct scmi_opp *opp;
268 struct scmi_msg_perf_describe_levels *dom_info;
269 struct scmi_msg_resp_perf_describe_levels *level_info;
270
271 ret = scmi_xfer_get_init(handle, PERF_DESCRIBE_LEVELS,
272 SCMI_PROTOCOL_PERF, sizeof(*dom_info), 0, &t);
273 if (ret)
274 return ret;
275
276 dom_info = t->tx.buf;
277 level_info = t->rx.buf;
278
279 do {
280 dom_info->domain = cpu_to_le32(domain);
281
282 dom_info->level_index = cpu_to_le32(tot_opp_cnt);
283
284 ret = scmi_do_xfer(handle, t);
285 if (ret)
286 break;
287
288 num_returned = le16_to_cpu(level_info->num_returned);
289 num_remaining = le16_to_cpu(level_info->num_remaining);
290 if (tot_opp_cnt + num_returned > MAX_OPPS) {
291 dev_err(handle->dev, "No. of OPPs exceeded MAX_OPPS");
292 break;
293 }
294
295 opp = &perf_dom->opp[tot_opp_cnt];
296 for (cnt = 0; cnt < num_returned; cnt++, opp++) {
297 opp->perf = le32_to_cpu(level_info->opp[cnt].perf_val);
298 opp->power = le32_to_cpu(level_info->opp[cnt].power);
299 opp->trans_latency_us = le16_to_cpu
300 (level_info->opp[cnt].transition_latency_us);
301
302 dev_dbg(handle->dev, "Level %d Power %d Latency %dus\n",
303 opp->perf, opp->power, opp->trans_latency_us);
304 }
305
306 tot_opp_cnt += num_returned;
307
308 scmi_reset_rx_to_maxsz(handle, t);
309
310
311
312
313 } while (num_returned && num_remaining);
314
315 perf_dom->opp_count = tot_opp_cnt;
316 scmi_xfer_put(handle, t);
317
318 sort(perf_dom->opp, tot_opp_cnt, sizeof(*opp), opp_cmp_func, NULL);
319 return ret;
320}
321
322#define SCMI_PERF_FC_RING_DB(w) \
323do { \
324 u##w val = 0; \
325 \
326 if (db->mask) \
327 val = ioread##w(db->addr) & db->mask; \
328 iowrite##w((u##w)db->set | val, db->addr); \
329} while (0)
330
331static void scmi_perf_fc_ring_db(struct scmi_fc_db_info *db)
332{
333 if (!db || !db->addr)
334 return;
335
336 if (db->width == 1)
337 SCMI_PERF_FC_RING_DB(8);
338 else if (db->width == 2)
339 SCMI_PERF_FC_RING_DB(16);
340 else if (db->width == 4)
341 SCMI_PERF_FC_RING_DB(32);
342 else
343#ifdef CONFIG_64BIT
344 SCMI_PERF_FC_RING_DB(64);
345#else
346 {
347 u64 val = 0;
348
349 if (db->mask)
350 val = ioread64_hi_lo(db->addr) & db->mask;
351 iowrite64_hi_lo(db->set | val, db->addr);
352 }
353#endif
354}
355
356static int scmi_perf_mb_limits_set(const struct scmi_handle *handle, u32 domain,
357 u32 max_perf, u32 min_perf)
358{
359 int ret;
360 struct scmi_xfer *t;
361 struct scmi_perf_set_limits *limits;
362
363 ret = scmi_xfer_get_init(handle, PERF_LIMITS_SET, SCMI_PROTOCOL_PERF,
364 sizeof(*limits), 0, &t);
365 if (ret)
366 return ret;
367
368 limits = t->tx.buf;
369 limits->domain = cpu_to_le32(domain);
370 limits->max_level = cpu_to_le32(max_perf);
371 limits->min_level = cpu_to_le32(min_perf);
372
373 ret = scmi_do_xfer(handle, t);
374
375 scmi_xfer_put(handle, t);
376 return ret;
377}
378
379static int scmi_perf_limits_set(const struct scmi_handle *handle, u32 domain,
380 u32 max_perf, u32 min_perf)
381{
382 struct scmi_perf_info *pi = handle->perf_priv;
383 struct perf_dom_info *dom = pi->dom_info + domain;
384
385 if (dom->fc_info && dom->fc_info->limit_set_addr) {
386 iowrite32(max_perf, dom->fc_info->limit_set_addr);
387 iowrite32(min_perf, dom->fc_info->limit_set_addr + 4);
388 scmi_perf_fc_ring_db(dom->fc_info->limit_set_db);
389 return 0;
390 }
391
392 return scmi_perf_mb_limits_set(handle, domain, max_perf, min_perf);
393}
394
395static int scmi_perf_mb_limits_get(const struct scmi_handle *handle, u32 domain,
396 u32 *max_perf, u32 *min_perf)
397{
398 int ret;
399 struct scmi_xfer *t;
400 struct scmi_perf_get_limits *limits;
401
402 ret = scmi_xfer_get_init(handle, PERF_LIMITS_GET, SCMI_PROTOCOL_PERF,
403 sizeof(__le32), 0, &t);
404 if (ret)
405 return ret;
406
407 put_unaligned_le32(domain, t->tx.buf);
408
409 ret = scmi_do_xfer(handle, t);
410 if (!ret) {
411 limits = t->rx.buf;
412
413 *max_perf = le32_to_cpu(limits->max_level);
414 *min_perf = le32_to_cpu(limits->min_level);
415 }
416
417 scmi_xfer_put(handle, t);
418 return ret;
419}
420
421static int scmi_perf_limits_get(const struct scmi_handle *handle, u32 domain,
422 u32 *max_perf, u32 *min_perf)
423{
424 struct scmi_perf_info *pi = handle->perf_priv;
425 struct perf_dom_info *dom = pi->dom_info + domain;
426
427 if (dom->fc_info && dom->fc_info->limit_get_addr) {
428 *max_perf = ioread32(dom->fc_info->limit_get_addr);
429 *min_perf = ioread32(dom->fc_info->limit_get_addr + 4);
430 return 0;
431 }
432
433 return scmi_perf_mb_limits_get(handle, domain, max_perf, min_perf);
434}
435
436static int scmi_perf_mb_level_set(const struct scmi_handle *handle, u32 domain,
437 u32 level, bool poll)
438{
439 int ret;
440 struct scmi_xfer *t;
441 struct scmi_perf_set_level *lvl;
442
443 ret = scmi_xfer_get_init(handle, PERF_LEVEL_SET, SCMI_PROTOCOL_PERF,
444 sizeof(*lvl), 0, &t);
445 if (ret)
446 return ret;
447
448 t->hdr.poll_completion = poll;
449 lvl = t->tx.buf;
450 lvl->domain = cpu_to_le32(domain);
451 lvl->level = cpu_to_le32(level);
452
453 ret = scmi_do_xfer(handle, t);
454
455 scmi_xfer_put(handle, t);
456 return ret;
457}
458
459static int scmi_perf_level_set(const struct scmi_handle *handle, u32 domain,
460 u32 level, bool poll)
461{
462 struct scmi_perf_info *pi = handle->perf_priv;
463 struct perf_dom_info *dom = pi->dom_info + domain;
464
465 if (dom->fc_info && dom->fc_info->level_set_addr) {
466 iowrite32(level, dom->fc_info->level_set_addr);
467 scmi_perf_fc_ring_db(dom->fc_info->level_set_db);
468 return 0;
469 }
470
471 return scmi_perf_mb_level_set(handle, domain, level, poll);
472}
473
474static int scmi_perf_mb_level_get(const struct scmi_handle *handle, u32 domain,
475 u32 *level, bool poll)
476{
477 int ret;
478 struct scmi_xfer *t;
479
480 ret = scmi_xfer_get_init(handle, PERF_LEVEL_GET, SCMI_PROTOCOL_PERF,
481 sizeof(u32), sizeof(u32), &t);
482 if (ret)
483 return ret;
484
485 t->hdr.poll_completion = poll;
486 put_unaligned_le32(domain, t->tx.buf);
487
488 ret = scmi_do_xfer(handle, t);
489 if (!ret)
490 *level = get_unaligned_le32(t->rx.buf);
491
492 scmi_xfer_put(handle, t);
493 return ret;
494}
495
496static int scmi_perf_level_get(const struct scmi_handle *handle, u32 domain,
497 u32 *level, bool poll)
498{
499 struct scmi_perf_info *pi = handle->perf_priv;
500 struct perf_dom_info *dom = pi->dom_info + domain;
501
502 if (dom->fc_info && dom->fc_info->level_get_addr) {
503 *level = ioread32(dom->fc_info->level_get_addr);
504 return 0;
505 }
506
507 return scmi_perf_mb_level_get(handle, domain, level, poll);
508}
509
510static int scmi_perf_level_limits_notify(const struct scmi_handle *handle,
511 u32 domain, int message_id,
512 bool enable)
513{
514 int ret;
515 struct scmi_xfer *t;
516 struct scmi_perf_notify_level_or_limits *notify;
517
518 ret = scmi_xfer_get_init(handle, message_id, SCMI_PROTOCOL_PERF,
519 sizeof(*notify), 0, &t);
520 if (ret)
521 return ret;
522
523 notify = t->tx.buf;
524 notify->domain = cpu_to_le32(domain);
525 notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0;
526
527 ret = scmi_do_xfer(handle, t);
528
529 scmi_xfer_put(handle, t);
530 return ret;
531}
532
533static bool scmi_perf_fc_size_is_valid(u32 msg, u32 size)
534{
535 if ((msg == PERF_LEVEL_GET || msg == PERF_LEVEL_SET) && size == 4)
536 return true;
537 if ((msg == PERF_LIMITS_GET || msg == PERF_LIMITS_SET) && size == 8)
538 return true;
539 return false;
540}
541
542static void
543scmi_perf_domain_desc_fc(const struct scmi_handle *handle, u32 domain,
544 u32 message_id, void __iomem **p_addr,
545 struct scmi_fc_db_info **p_db)
546{
547 int ret;
548 u32 flags;
549 u64 phys_addr;
550 u8 size;
551 void __iomem *addr;
552 struct scmi_xfer *t;
553 struct scmi_fc_db_info *db;
554 struct scmi_perf_get_fc_info *info;
555 struct scmi_msg_resp_perf_desc_fc *resp;
556
557 if (!p_addr)
558 return;
559
560 ret = scmi_xfer_get_init(handle, PERF_DESCRIBE_FASTCHANNEL,
561 SCMI_PROTOCOL_PERF,
562 sizeof(*info), sizeof(*resp), &t);
563 if (ret)
564 return;
565
566 info = t->tx.buf;
567 info->domain = cpu_to_le32(domain);
568 info->message_id = cpu_to_le32(message_id);
569
570 ret = scmi_do_xfer(handle, t);
571 if (ret)
572 goto err_xfer;
573
574 resp = t->rx.buf;
575 flags = le32_to_cpu(resp->attr);
576 size = le32_to_cpu(resp->chan_size);
577 if (!scmi_perf_fc_size_is_valid(message_id, size))
578 goto err_xfer;
579
580 phys_addr = le32_to_cpu(resp->chan_addr_low);
581 phys_addr |= (u64)le32_to_cpu(resp->chan_addr_high) << 32;
582 addr = devm_ioremap(handle->dev, phys_addr, size);
583 if (!addr)
584 goto err_xfer;
585 *p_addr = addr;
586
587 if (p_db && SUPPORTS_DOORBELL(flags)) {
588 db = devm_kzalloc(handle->dev, sizeof(*db), GFP_KERNEL);
589 if (!db)
590 goto err_xfer;
591
592 size = 1 << DOORBELL_REG_WIDTH(flags);
593 phys_addr = le32_to_cpu(resp->db_addr_low);
594 phys_addr |= (u64)le32_to_cpu(resp->db_addr_high) << 32;
595 addr = devm_ioremap(handle->dev, phys_addr, size);
596 if (!addr)
597 goto err_xfer;
598
599 db->addr = addr;
600 db->width = size;
601 db->set = le32_to_cpu(resp->db_set_lmask);
602 db->set |= (u64)le32_to_cpu(resp->db_set_hmask) << 32;
603 db->mask = le32_to_cpu(resp->db_preserve_lmask);
604 db->mask |= (u64)le32_to_cpu(resp->db_preserve_hmask) << 32;
605 *p_db = db;
606 }
607err_xfer:
608 scmi_xfer_put(handle, t);
609}
610
611static void scmi_perf_domain_init_fc(const struct scmi_handle *handle,
612 u32 domain, struct scmi_fc_info **p_fc)
613{
614 struct scmi_fc_info *fc;
615
616 fc = devm_kzalloc(handle->dev, sizeof(*fc), GFP_KERNEL);
617 if (!fc)
618 return;
619
620 scmi_perf_domain_desc_fc(handle, domain, PERF_LEVEL_SET,
621 &fc->level_set_addr, &fc->level_set_db);
622 scmi_perf_domain_desc_fc(handle, domain, PERF_LEVEL_GET,
623 &fc->level_get_addr, NULL);
624 scmi_perf_domain_desc_fc(handle, domain, PERF_LIMITS_SET,
625 &fc->limit_set_addr, &fc->limit_set_db);
626 scmi_perf_domain_desc_fc(handle, domain, PERF_LIMITS_GET,
627 &fc->limit_get_addr, NULL);
628 *p_fc = fc;
629}
630
631
632static int scmi_dev_domain_id(struct device *dev)
633{
634 struct of_phandle_args clkspec;
635
636 if (of_parse_phandle_with_args(dev->of_node, "clocks", "#clock-cells",
637 0, &clkspec))
638 return -EINVAL;
639
640 return clkspec.args[0];
641}
642
643static int scmi_dvfs_device_opps_add(const struct scmi_handle *handle,
644 struct device *dev)
645{
646 int idx, ret, domain;
647 unsigned long freq;
648 struct scmi_opp *opp;
649 struct perf_dom_info *dom;
650 struct scmi_perf_info *pi = handle->perf_priv;
651
652 domain = scmi_dev_domain_id(dev);
653 if (domain < 0)
654 return domain;
655
656 dom = pi->dom_info + domain;
657
658 for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) {
659 freq = opp->perf * dom->mult_factor;
660
661 ret = dev_pm_opp_add(dev, freq, 0);
662 if (ret) {
663 dev_warn(dev, "failed to add opp %luHz\n", freq);
664
665 while (idx-- > 0) {
666 freq = (--opp)->perf * dom->mult_factor;
667 dev_pm_opp_remove(dev, freq);
668 }
669 return ret;
670 }
671 }
672 return 0;
673}
674
675static int scmi_dvfs_transition_latency_get(const struct scmi_handle *handle,
676 struct device *dev)
677{
678 struct perf_dom_info *dom;
679 struct scmi_perf_info *pi = handle->perf_priv;
680 int domain = scmi_dev_domain_id(dev);
681
682 if (domain < 0)
683 return domain;
684
685 dom = pi->dom_info + domain;
686
687 return dom->opp[dom->opp_count - 1].trans_latency_us * 1000;
688}
689
690static int scmi_dvfs_freq_set(const struct scmi_handle *handle, u32 domain,
691 unsigned long freq, bool poll)
692{
693 struct scmi_perf_info *pi = handle->perf_priv;
694 struct perf_dom_info *dom = pi->dom_info + domain;
695
696 return scmi_perf_level_set(handle, domain, freq / dom->mult_factor,
697 poll);
698}
699
700static int scmi_dvfs_freq_get(const struct scmi_handle *handle, u32 domain,
701 unsigned long *freq, bool poll)
702{
703 int ret;
704 u32 level;
705 struct scmi_perf_info *pi = handle->perf_priv;
706 struct perf_dom_info *dom = pi->dom_info + domain;
707
708 ret = scmi_perf_level_get(handle, domain, &level, poll);
709 if (!ret)
710 *freq = level * dom->mult_factor;
711
712 return ret;
713}
714
715static int scmi_dvfs_est_power_get(const struct scmi_handle *handle, u32 domain,
716 unsigned long *freq, unsigned long *power)
717{
718 struct scmi_perf_info *pi = handle->perf_priv;
719 struct perf_dom_info *dom;
720 unsigned long opp_freq;
721 int idx, ret = -EINVAL;
722 struct scmi_opp *opp;
723
724 dom = pi->dom_info + domain;
725 if (!dom)
726 return -EIO;
727
728 for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) {
729 opp_freq = opp->perf * dom->mult_factor;
730 if (opp_freq < *freq)
731 continue;
732
733 *freq = opp_freq;
734 *power = opp->power;
735 ret = 0;
736 break;
737 }
738
739 return ret;
740}
741
742static bool scmi_fast_switch_possible(const struct scmi_handle *handle,
743 struct device *dev)
744{
745 struct perf_dom_info *dom;
746 struct scmi_perf_info *pi = handle->perf_priv;
747
748 dom = pi->dom_info + scmi_dev_domain_id(dev);
749
750 return dom->fc_info && dom->fc_info->level_set_addr;
751}
752
753static const struct scmi_perf_ops perf_ops = {
754 .limits_set = scmi_perf_limits_set,
755 .limits_get = scmi_perf_limits_get,
756 .level_set = scmi_perf_level_set,
757 .level_get = scmi_perf_level_get,
758 .device_domain_id = scmi_dev_domain_id,
759 .transition_latency_get = scmi_dvfs_transition_latency_get,
760 .device_opps_add = scmi_dvfs_device_opps_add,
761 .freq_set = scmi_dvfs_freq_set,
762 .freq_get = scmi_dvfs_freq_get,
763 .est_power_get = scmi_dvfs_est_power_get,
764 .fast_switch_possible = scmi_fast_switch_possible,
765};
766
767static int scmi_perf_set_notify_enabled(const struct scmi_handle *handle,
768 u8 evt_id, u32 src_id, bool enable)
769{
770 int ret, cmd_id;
771
772 if (evt_id >= ARRAY_SIZE(evt_2_cmd))
773 return -EINVAL;
774
775 cmd_id = evt_2_cmd[evt_id];
776 ret = scmi_perf_level_limits_notify(handle, src_id, cmd_id, enable);
777 if (ret)
778 pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n",
779 evt_id, src_id, ret);
780
781 return ret;
782}
783
784static void *scmi_perf_fill_custom_report(const struct scmi_handle *handle,
785 u8 evt_id, ktime_t timestamp,
786 const void *payld, size_t payld_sz,
787 void *report, u32 *src_id)
788{
789 void *rep = NULL;
790
791 switch (evt_id) {
792 case SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED:
793 {
794 const struct scmi_perf_limits_notify_payld *p = payld;
795 struct scmi_perf_limits_report *r = report;
796
797 if (sizeof(*p) != payld_sz)
798 break;
799
800 r->timestamp = timestamp;
801 r->agent_id = le32_to_cpu(p->agent_id);
802 r->domain_id = le32_to_cpu(p->domain_id);
803 r->range_max = le32_to_cpu(p->range_max);
804 r->range_min = le32_to_cpu(p->range_min);
805 *src_id = r->domain_id;
806 rep = r;
807 break;
808 }
809 case SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED:
810 {
811 const struct scmi_perf_level_notify_payld *p = payld;
812 struct scmi_perf_level_report *r = report;
813
814 if (sizeof(*p) != payld_sz)
815 break;
816
817 r->timestamp = timestamp;
818 r->agent_id = le32_to_cpu(p->agent_id);
819 r->domain_id = le32_to_cpu(p->domain_id);
820 r->performance_level = le32_to_cpu(p->performance_level);
821 *src_id = r->domain_id;
822 rep = r;
823 break;
824 }
825 default:
826 break;
827 }
828
829 return rep;
830}
831
832static const struct scmi_event perf_events[] = {
833 {
834 .id = SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED,
835 .max_payld_sz = sizeof(struct scmi_perf_limits_notify_payld),
836 .max_report_sz = sizeof(struct scmi_perf_limits_report),
837 },
838 {
839 .id = SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED,
840 .max_payld_sz = sizeof(struct scmi_perf_level_notify_payld),
841 .max_report_sz = sizeof(struct scmi_perf_level_report),
842 },
843};
844
845static const struct scmi_event_ops perf_event_ops = {
846 .set_notify_enabled = scmi_perf_set_notify_enabled,
847 .fill_custom_report = scmi_perf_fill_custom_report,
848};
849
850static int scmi_perf_protocol_init(struct scmi_handle *handle)
851{
852 int domain;
853 u32 version;
854 struct scmi_perf_info *pinfo;
855
856 scmi_version_get(handle, SCMI_PROTOCOL_PERF, &version);
857
858 dev_dbg(handle->dev, "Performance Version %d.%d\n",
859 PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version));
860
861 pinfo = devm_kzalloc(handle->dev, sizeof(*pinfo), GFP_KERNEL);
862 if (!pinfo)
863 return -ENOMEM;
864
865 scmi_perf_attributes_get(handle, pinfo);
866
867 pinfo->dom_info = devm_kcalloc(handle->dev, pinfo->num_domains,
868 sizeof(*pinfo->dom_info), GFP_KERNEL);
869 if (!pinfo->dom_info)
870 return -ENOMEM;
871
872 for (domain = 0; domain < pinfo->num_domains; domain++) {
873 struct perf_dom_info *dom = pinfo->dom_info + domain;
874
875 scmi_perf_domain_attributes_get(handle, domain, dom);
876 scmi_perf_describe_levels_get(handle, domain, dom);
877
878 if (dom->perf_fastchannels)
879 scmi_perf_domain_init_fc(handle, domain, &dom->fc_info);
880 }
881
882 scmi_register_protocol_events(handle,
883 SCMI_PROTOCOL_PERF, SCMI_PROTO_QUEUE_SZ,
884 &perf_event_ops, perf_events,
885 ARRAY_SIZE(perf_events),
886 pinfo->num_domains);
887
888 pinfo->version = version;
889 handle->perf_ops = &perf_ops;
890 handle->perf_priv = pinfo;
891
892 return 0;
893}
894
895DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(SCMI_PROTOCOL_PERF, perf)
896
