1// SPDX-License-Identifier: GPL-2.0 2/* 3 * System Control and Management Interface (SCMI) Performance Protocol 4 * 5 * Copyright (C) 2018-2023 ARM Ltd. 6 */ 7 8#define pr_fmt(fmt) "SCMI Notifications PERF - " fmt 9 10#include <linux/bits.h> 11#include <linux/hashtable.h> 12#include <linux/io.h> 13#include <linux/log2.h> 14#include <linux/module.h> 15#include <linux/of.h> 16#include <linux/platform_device.h> 17#include <linux/pm_opp.h> 18#include <linux/scmi_protocol.h> 19#include <linux/sort.h> 20#include <linux/xarray.h> 21 22#include <trace/events/scmi.h> 23 24#include "protocols.h" 25#include "notify.h" 26 27#define MAX_OPPS 16 28 29enum scmi_performance_protocol_cmd { 30 PERF_DOMAIN_ATTRIBUTES = 0x3, 31 PERF_DESCRIBE_LEVELS = 0x4, 32 PERF_LIMITS_SET = 0x5, 33 PERF_LIMITS_GET = 0x6, 34 PERF_LEVEL_SET = 0x7, 35 PERF_LEVEL_GET = 0x8, 36 PERF_NOTIFY_LIMITS = 0x9, 37 PERF_NOTIFY_LEVEL = 0xa, 38 PERF_DESCRIBE_FASTCHANNEL = 0xb, 39 PERF_DOMAIN_NAME_GET = 0xc, 40}; 41 42enum { 43 PERF_FC_LEVEL, 44 PERF_FC_LIMIT, 45 PERF_FC_MAX, 46}; 47 48struct scmi_opp { 49 u32 perf; 50 u32 power; 51 u32 trans_latency_us; 52 u32 indicative_freq; 53 u32 level_index; 54 struct hlist_node hash; 55}; 56 57struct scmi_msg_resp_perf_attributes { 58 __le16 num_domains; 59 __le16 flags; 60#define POWER_SCALE_IN_MILLIWATT(x) ((x) & BIT(0)) 61#define POWER_SCALE_IN_MICROWATT(x) ((x) & BIT(1)) 62 __le32 stats_addr_low; 63 __le32 stats_addr_high; 64 __le32 stats_size; 65}; 66 67struct scmi_msg_resp_perf_domain_attributes { 68 __le32 flags; 69#define SUPPORTS_SET_LIMITS(x) ((x) & BIT(31)) 70#define SUPPORTS_SET_PERF_LVL(x) ((x) & BIT(30)) 71#define SUPPORTS_PERF_LIMIT_NOTIFY(x) ((x) & BIT(29)) 72#define SUPPORTS_PERF_LEVEL_NOTIFY(x) ((x) & BIT(28)) 73#define SUPPORTS_PERF_FASTCHANNELS(x) ((x) & BIT(27)) 74#define SUPPORTS_EXTENDED_NAMES(x) ((x) & BIT(26)) 75#define SUPPORTS_LEVEL_INDEXING(x) ((x) & BIT(25)) 76 __le32 rate_limit_us; 77 __le32 sustained_freq_khz; 78 __le32 sustained_perf_level; 79 u8 name[SCMI_SHORT_NAME_MAX_SIZE]; 80}; 81 82struct scmi_msg_perf_describe_levels { 83 __le32 domain; 84 __le32 level_index; 85}; 86 87struct scmi_perf_set_limits { 88 __le32 domain; 89 __le32 max_level; 90 __le32 min_level; 91}; 92 93struct scmi_perf_get_limits { 94 __le32 max_level; 95 __le32 min_level; 96}; 97 98struct scmi_perf_set_level { 99 __le32 domain; 100 __le32 level; 101}; 102 103struct scmi_perf_notify_level_or_limits { 104 __le32 domain; 105 __le32 notify_enable; 106}; 107 108struct scmi_perf_limits_notify_payld { 109 __le32 agent_id; 110 __le32 domain_id; 111 __le32 range_max; 112 __le32 range_min; 113}; 114 115struct scmi_perf_level_notify_payld { 116 __le32 agent_id; 117 __le32 domain_id; 118 __le32 performance_level; 119}; 120 121struct scmi_msg_resp_perf_describe_levels { 122 __le16 num_returned; 123 __le16 num_remaining; 124 struct { 125 __le32 perf_val; 126 __le32 power; 127 __le16 transition_latency_us; 128 __le16 reserved; 129 } opp[]; 130}; 131 132struct scmi_msg_resp_perf_describe_levels_v4 { 133 __le16 num_returned; 134 __le16 num_remaining; 135 struct { 136 __le32 perf_val; 137 __le32 power; 138 __le16 transition_latency_us; 139 __le16 reserved; 140 __le32 indicative_freq; 141 __le32 level_index; 142 } opp[]; 143}; 144 145struct perf_dom_info { 146 u32 id; 147 bool set_limits; 148 bool perf_limit_notify; 149 bool perf_level_notify; 150 bool perf_fastchannels; 151 bool level_indexing_mode; 152 u32 opp_count; 153 u32 sustained_freq_khz; 154 u32 sustained_perf_level; 155 unsigned long mult_factor; 156 struct scmi_perf_domain_info info; 157 struct scmi_opp opp[MAX_OPPS]; 158 struct scmi_fc_info *fc_info; 159 struct xarray opps_by_idx; 160 struct xarray opps_by_lvl; 161 DECLARE_HASHTABLE(opps_by_freq, ilog2(MAX_OPPS)); 162}; 163 164#define LOOKUP_BY_FREQ(__htp, __freq) \ 165({ \ 166 /* u32 cast is needed to pick right hash func */ \ 167 u32 f_ = (u32)(__freq); \ 168 struct scmi_opp *_opp; \ 169 \ 170 hash_for_each_possible((__htp), _opp, hash, f_) \ 171 if (_opp->indicative_freq == f_) \ 172 break; \ 173 _opp; \ 174}) 175 176struct scmi_perf_info { 177 u32 version; 178 u16 num_domains; 179 enum scmi_power_scale power_scale; 180 u64 stats_addr; 181 u32 stats_size; 182 struct perf_dom_info *dom_info; 183}; 184 185static enum scmi_performance_protocol_cmd evt_2_cmd[] = { 186 PERF_NOTIFY_LIMITS, 187 PERF_NOTIFY_LEVEL, 188}; 189 190static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph, 191 struct scmi_perf_info *pi) 192{ 193 int ret; 194 struct scmi_xfer *t; 195 struct scmi_msg_resp_perf_attributes *attr; 196 197 ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0, 198 sizeof(*attr), &t); 199 if (ret) 200 return ret; 201 202 attr = t->rx.buf; 203 204 ret = ph->xops->do_xfer(ph, t); 205 if (!ret) { 206 u16 flags = le16_to_cpu(attr->flags); 207 208 pi->num_domains = le16_to_cpu(attr->num_domains); 209 210 if (POWER_SCALE_IN_MILLIWATT(flags)) 211 pi->power_scale = SCMI_POWER_MILLIWATTS; 212 if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3) 213 if (POWER_SCALE_IN_MICROWATT(flags)) 214 pi->power_scale = SCMI_POWER_MICROWATTS; 215 216 pi->stats_addr = le32_to_cpu(attr->stats_addr_low) | 217 (u64)le32_to_cpu(attr->stats_addr_high) << 32; 218 pi->stats_size = le32_to_cpu(attr->stats_size); 219 } 220 221 ph->xops->xfer_put(ph, t); 222 return ret; 223} 224 225static void scmi_perf_xa_destroy(void *data) 226{ 227 int domain; 228 struct scmi_perf_info *pinfo = data; 229 230 for (domain = 0; domain < pinfo->num_domains; domain++) { 231 xa_destroy(&((pinfo->dom_info + domain)->opps_by_idx)); 232 xa_destroy(&((pinfo->dom_info + domain)->opps_by_lvl)); 233 } 234} 235 236static int 237scmi_perf_domain_attributes_get(const struct scmi_protocol_handle *ph, 238 struct perf_dom_info *dom_info, 239 u32 version) 240{ 241 int ret; 242 u32 flags; 243 struct scmi_xfer *t; 244 struct scmi_msg_resp_perf_domain_attributes *attr; 245 246 ret = ph->xops->xfer_get_init(ph, PERF_DOMAIN_ATTRIBUTES, 247 sizeof(dom_info->id), sizeof(*attr), &t); 248 if (ret) 249 return ret; 250 251 put_unaligned_le32(dom_info->id, t->tx.buf); 252 attr = t->rx.buf; 253 254 ret = ph->xops->do_xfer(ph, t); 255 if (!ret) { 256 flags = le32_to_cpu(attr->flags); 257 258 dom_info->set_limits = SUPPORTS_SET_LIMITS(flags); 259 dom_info->info.set_perf = SUPPORTS_SET_PERF_LVL(flags); 260 dom_info->perf_limit_notify = SUPPORTS_PERF_LIMIT_NOTIFY(flags); 261 dom_info->perf_level_notify = SUPPORTS_PERF_LEVEL_NOTIFY(flags); 262 dom_info->perf_fastchannels = SUPPORTS_PERF_FASTCHANNELS(flags); 263 if (PROTOCOL_REV_MAJOR(version) >= 0x4) 264 dom_info->level_indexing_mode = 265 SUPPORTS_LEVEL_INDEXING(flags); 266 dom_info->sustained_freq_khz = 267 le32_to_cpu(attr->sustained_freq_khz); 268 dom_info->sustained_perf_level = 269 le32_to_cpu(attr->sustained_perf_level); 270 if (!dom_info->sustained_freq_khz || 271 !dom_info->sustained_perf_level || 272 dom_info->level_indexing_mode) 273 /* CPUFreq converts to kHz, hence default 1000 */ 274 dom_info->mult_factor = 1000; 275 else 276 dom_info->mult_factor = 277 (dom_info->sustained_freq_khz * 1000UL) 278 / dom_info->sustained_perf_level; 279 strscpy(dom_info->info.name, attr->name, 280 SCMI_SHORT_NAME_MAX_SIZE); 281 } 282 283 ph->xops->xfer_put(ph, t); 284 285 /* 286 * If supported overwrite short name with the extended one; 287 * on error just carry on and use already provided short name. 288 */ 289 if (!ret && PROTOCOL_REV_MAJOR(version) >= 0x3 && 290 SUPPORTS_EXTENDED_NAMES(flags)) 291 ph->hops->extended_name_get(ph, PERF_DOMAIN_NAME_GET, 292 dom_info->id, dom_info->info.name, 293 SCMI_MAX_STR_SIZE); 294 295 if (dom_info->level_indexing_mode) { 296 xa_init(&dom_info->opps_by_idx); 297 xa_init(&dom_info->opps_by_lvl); 298 hash_init(dom_info->opps_by_freq); 299 } 300 301 return ret; 302} 303 304static int opp_cmp_func(const void *opp1, const void *opp2) 305{ 306 const struct scmi_opp *t1 = opp1, *t2 = opp2; 307 308 return t1->perf - t2->perf; 309} 310 311struct scmi_perf_ipriv { 312 u32 version; 313 struct perf_dom_info *perf_dom; 314}; 315 316static void iter_perf_levels_prepare_message(void *message, 317 unsigned int desc_index, 318 const void *priv) 319{ 320 struct scmi_msg_perf_describe_levels *msg = message; 321 const struct scmi_perf_ipriv *p = priv; 322 323 msg->domain = cpu_to_le32(p->perf_dom->id); 324 /* Set the number of OPPs to be skipped/already read */ 325 msg->level_index = cpu_to_le32(desc_index); 326} 327 328static int iter_perf_levels_update_state(struct scmi_iterator_state *st, 329 const void *response, void *priv) 330{ 331 const struct scmi_msg_resp_perf_describe_levels *r = response; 332 333 st->num_returned = le16_to_cpu(r->num_returned); 334 st->num_remaining = le16_to_cpu(r->num_remaining); 335 336 return 0; 337} 338 339static inline void 340process_response_opp(struct scmi_opp *opp, unsigned int loop_idx, 341 const struct scmi_msg_resp_perf_describe_levels *r) 342{ 343 opp->perf = le32_to_cpu(r->opp[loop_idx].perf_val); 344 opp->power = le32_to_cpu(r->opp[loop_idx].power); 345 opp->trans_latency_us = 346 le16_to_cpu(r->opp[loop_idx].transition_latency_us); 347} 348 349static inline void 350process_response_opp_v4(struct device *dev, struct perf_dom_info *dom, 351 struct scmi_opp *opp, unsigned int loop_idx, 352 const struct scmi_msg_resp_perf_describe_levels_v4 *r) 353{ 354 opp->perf = le32_to_cpu(r->opp[loop_idx].perf_val); 355 opp->power = le32_to_cpu(r->opp[loop_idx].power); 356 opp->trans_latency_us = 357 le16_to_cpu(r->opp[loop_idx].transition_latency_us); 358 359 /* Note that PERF v4 reports always five 32-bit words */ 360 opp->indicative_freq = le32_to_cpu(r->opp[loop_idx].indicative_freq); 361 if (dom->level_indexing_mode) { 362 int ret; 363 364 opp->level_index = le32_to_cpu(r->opp[loop_idx].level_index); 365 366 ret = xa_insert(&dom->opps_by_idx, opp->level_index, opp, 367 GFP_KERNEL); 368 if (ret) 369 dev_warn(dev, 370 "Failed to add opps_by_idx at %d - ret:%d\n", 371 opp->level_index, ret); 372 373 ret = xa_insert(&dom->opps_by_lvl, opp->perf, opp, GFP_KERNEL); 374 if (ret) 375 dev_warn(dev, 376 "Failed to add opps_by_lvl at %d - ret:%d\n", 377 opp->perf, ret); 378 379 hash_add(dom->opps_by_freq, &opp->hash, opp->indicative_freq); 380 } 381} 382 383static int 384iter_perf_levels_process_response(const struct scmi_protocol_handle *ph, 385 const void *response, 386 struct scmi_iterator_state *st, void *priv) 387{ 388 struct scmi_opp *opp; 389 struct scmi_perf_ipriv *p = priv; 390 391 opp = &p->perf_dom->opp[st->desc_index + st->loop_idx]; 392 if (PROTOCOL_REV_MAJOR(p->version) <= 0x3) 393 process_response_opp(opp, st->loop_idx, response); 394 else 395 process_response_opp_v4(ph->dev, p->perf_dom, opp, st->loop_idx, 396 response); 397 p->perf_dom->opp_count++; 398 399 dev_dbg(ph->dev, "Level %d Power %d Latency %dus Ifreq %d Index %d\n", 400 opp->perf, opp->power, opp->trans_latency_us, 401 opp->indicative_freq, opp->level_index); 402 403 return 0; 404} 405 406static int 407scmi_perf_describe_levels_get(const struct scmi_protocol_handle *ph, 408 struct perf_dom_info *perf_dom, u32 version) 409{ 410 int ret; 411 void *iter; 412 struct scmi_iterator_ops ops = { 413 .prepare_message = iter_perf_levels_prepare_message, 414 .update_state = iter_perf_levels_update_state, 415 .process_response = iter_perf_levels_process_response, 416 }; 417 struct scmi_perf_ipriv ppriv = { 418 .version = version, 419 .perf_dom = perf_dom, 420 }; 421 422 iter = ph->hops->iter_response_init(ph, &ops, MAX_OPPS, 423 PERF_DESCRIBE_LEVELS, 424 sizeof(struct scmi_msg_perf_describe_levels), 425 &ppriv); 426 if (IS_ERR(iter)) 427 return PTR_ERR(iter); 428 429 ret = ph->hops->iter_response_run(iter); 430 if (ret) 431 return ret; 432 433 if (perf_dom->opp_count) 434 sort(perf_dom->opp, perf_dom->opp_count, 435 sizeof(struct scmi_opp), opp_cmp_func, NULL); 436 437 return ret; 438} 439 440static int scmi_perf_num_domains_get(const struct scmi_protocol_handle *ph) 441{ 442 struct scmi_perf_info *pi = ph->get_priv(ph); 443 444 return pi->num_domains; 445} 446 447static inline struct perf_dom_info * 448scmi_perf_domain_lookup(const struct scmi_protocol_handle *ph, u32 domain) 449{ 450 struct scmi_perf_info *pi = ph->get_priv(ph); 451 452 if (domain >= pi->num_domains) 453 return ERR_PTR(-EINVAL); 454 455 return pi->dom_info + domain; 456} 457 458static const struct scmi_perf_domain_info * 459scmi_perf_info_get(const struct scmi_protocol_handle *ph, u32 domain) 460{ 461 struct perf_dom_info *dom; 462 463 dom = scmi_perf_domain_lookup(ph, domain); 464 if (IS_ERR(dom)) 465 return ERR_PTR(-EINVAL); 466 467 return &dom->info; 468} 469 470static int scmi_perf_msg_limits_set(const struct scmi_protocol_handle *ph, 471 u32 domain, u32 max_perf, u32 min_perf) 472{ 473 int ret; 474 struct scmi_xfer *t; 475 struct scmi_perf_set_limits *limits; 476 477 ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_SET, 478 sizeof(*limits), 0, &t); 479 if (ret) 480 return ret; 481 482 limits = t->tx.buf; 483 limits->domain = cpu_to_le32(domain); 484 limits->max_level = cpu_to_le32(max_perf); 485 limits->min_level = cpu_to_le32(min_perf); 486 487 ret = ph->xops->do_xfer(ph, t); 488 489 ph->xops->xfer_put(ph, t); 490 return ret; 491} 492 493static int __scmi_perf_limits_set(const struct scmi_protocol_handle *ph, 494 struct perf_dom_info *dom, u32 max_perf, 495 u32 min_perf) 496{ 497 if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].set_addr) { 498 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT]; 499 500 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_SET, 501 dom->id, min_perf, max_perf); 502 iowrite32(max_perf, fci->set_addr); 503 iowrite32(min_perf, fci->set_addr + 4); 504 ph->hops->fastchannel_db_ring(fci->set_db); 505 return 0; 506 } 507 508 return scmi_perf_msg_limits_set(ph, dom->id, max_perf, min_perf); 509} 510 511static int scmi_perf_limits_set(const struct scmi_protocol_handle *ph, 512 u32 domain, u32 max_perf, u32 min_perf) 513{ 514 struct scmi_perf_info *pi = ph->get_priv(ph); 515 struct perf_dom_info *dom; 516 517 dom = scmi_perf_domain_lookup(ph, domain); 518 if (IS_ERR(dom)) 519 return PTR_ERR(dom); 520 521 if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3 && !max_perf && !min_perf) 522 return -EINVAL; 523 524 if (dom->level_indexing_mode) { 525 struct scmi_opp *opp; 526 527 if (min_perf) { 528 opp = xa_load(&dom->opps_by_lvl, min_perf); 529 if (!opp) 530 return -EIO; 531 532 min_perf = opp->level_index; 533 } 534 535 if (max_perf) { 536 opp = xa_load(&dom->opps_by_lvl, max_perf); 537 if (!opp) 538 return -EIO; 539 540 max_perf = opp->level_index; 541 } 542 } 543 544 return __scmi_perf_limits_set(ph, dom, max_perf, min_perf); 545} 546 547static int scmi_perf_msg_limits_get(const struct scmi_protocol_handle *ph, 548 u32 domain, u32 *max_perf, u32 *min_perf) 549{ 550 int ret; 551 struct scmi_xfer *t; 552 struct scmi_perf_get_limits *limits; 553 554 ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_GET, 555 sizeof(__le32), 0, &t); 556 if (ret) 557 return ret; 558 559 put_unaligned_le32(domain, t->tx.buf); 560 561 ret = ph->xops->do_xfer(ph, t); 562 if (!ret) { 563 limits = t->rx.buf; 564 565 *max_perf = le32_to_cpu(limits->max_level); 566 *min_perf = le32_to_cpu(limits->min_level); 567 } 568 569 ph->xops->xfer_put(ph, t); 570 return ret; 571} 572 573static int __scmi_perf_limits_get(const struct scmi_protocol_handle *ph, 574 struct perf_dom_info *dom, u32 *max_perf, 575 u32 *min_perf) 576{ 577 if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].get_addr) { 578 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT]; 579 580 *max_perf = ioread32(fci->get_addr); 581 *min_perf = ioread32(fci->get_addr + 4); 582 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_GET, 583 dom->id, *min_perf, *max_perf); 584 return 0; 585 } 586 587 return scmi_perf_msg_limits_get(ph, dom->id, max_perf, min_perf); 588} 589 590static int scmi_perf_limits_get(const struct scmi_protocol_handle *ph, 591 u32 domain, u32 *max_perf, u32 *min_perf) 592{ 593 int ret; 594 struct perf_dom_info *dom; 595 596 dom = scmi_perf_domain_lookup(ph, domain); 597 if (IS_ERR(dom)) 598 return PTR_ERR(dom); 599 600 ret = __scmi_perf_limits_get(ph, dom, max_perf, min_perf); 601 if (ret) 602 return ret; 603 604 if (dom->level_indexing_mode) { 605 struct scmi_opp *opp; 606 607 opp = xa_load(&dom->opps_by_idx, *min_perf); 608 if (!opp) 609 return -EIO; 610 611 *min_perf = opp->perf; 612 613 opp = xa_load(&dom->opps_by_idx, *max_perf); 614 if (!opp) 615 return -EIO; 616 617 *max_perf = opp->perf; 618 } 619 620 return 0; 621} 622 623static int scmi_perf_msg_level_set(const struct scmi_protocol_handle *ph, 624 u32 domain, u32 level, bool poll) 625{ 626 int ret; 627 struct scmi_xfer *t; 628 struct scmi_perf_set_level *lvl; 629 630 ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_SET, sizeof(*lvl), 0, &t); 631 if (ret) 632 return ret; 633 634 t->hdr.poll_completion = poll; 635 lvl = t->tx.buf; 636 lvl->domain = cpu_to_le32(domain); 637 lvl->level = cpu_to_le32(level); 638 639 ret = ph->xops->do_xfer(ph, t); 640 641 ph->xops->xfer_put(ph, t); 642 return ret; 643} 644 645static int __scmi_perf_level_set(const struct scmi_protocol_handle *ph, 646 struct perf_dom_info *dom, u32 level, 647 bool poll) 648{ 649 if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr) { 650 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LEVEL]; 651 652 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_SET, 653 dom->id, level, 0); 654 iowrite32(level, fci->set_addr); 655 ph->hops->fastchannel_db_ring(fci->set_db); 656 return 0; 657 } 658 659 return scmi_perf_msg_level_set(ph, dom->id, level, poll); 660} 661 662static int scmi_perf_level_set(const struct scmi_protocol_handle *ph, 663 u32 domain, u32 level, bool poll) 664{ 665 struct perf_dom_info *dom; 666 667 dom = scmi_perf_domain_lookup(ph, domain); 668 if (IS_ERR(dom)) 669 return PTR_ERR(dom); 670 671 if (dom->level_indexing_mode) { 672 struct scmi_opp *opp; 673 674 opp = xa_load(&dom->opps_by_lvl, level); 675 if (!opp) 676 return -EIO; 677 678 level = opp->level_index; 679 } 680 681 return __scmi_perf_level_set(ph, dom, level, poll); 682} 683 684static int scmi_perf_msg_level_get(const struct scmi_protocol_handle *ph, 685 u32 domain, u32 *level, bool poll) 686{ 687 int ret; 688 struct scmi_xfer *t; 689 690 ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_GET, 691 sizeof(u32), sizeof(u32), &t); 692 if (ret) 693 return ret; 694 695 t->hdr.poll_completion = poll; 696 put_unaligned_le32(domain, t->tx.buf); 697 698 ret = ph->xops->do_xfer(ph, t); 699 if (!ret) 700 *level = get_unaligned_le32(t->rx.buf); 701 702 ph->xops->xfer_put(ph, t); 703 return ret; 704} 705 706static int __scmi_perf_level_get(const struct scmi_protocol_handle *ph, 707 struct perf_dom_info *dom, u32 *level, 708 bool poll) 709{ 710 if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].get_addr) { 711 *level = ioread32(dom->fc_info[PERF_FC_LEVEL].get_addr); 712 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_GET, 713 dom->id, *level, 0); 714 return 0; 715 } 716 717 return scmi_perf_msg_level_get(ph, dom->id, level, poll); 718} 719 720static int scmi_perf_level_get(const struct scmi_protocol_handle *ph, 721 u32 domain, u32 *level, bool poll) 722{ 723 int ret; 724 struct perf_dom_info *dom; 725 726 dom = scmi_perf_domain_lookup(ph, domain); 727 if (IS_ERR(dom)) 728 return PTR_ERR(dom); 729 730 ret = __scmi_perf_level_get(ph, dom, level, poll); 731 if (ret) 732 return ret; 733 734 if (dom->level_indexing_mode) { 735 struct scmi_opp *opp; 736 737 opp = xa_load(&dom->opps_by_idx, *level); 738 if (!opp) 739 return -EIO; 740 741 *level = opp->perf; 742 } 743 744 return 0; 745} 746 747static int scmi_perf_level_limits_notify(const struct scmi_protocol_handle *ph, 748 u32 domain, int message_id, 749 bool enable) 750{ 751 int ret; 752 struct scmi_xfer *t; 753 struct scmi_perf_notify_level_or_limits *notify; 754 755 ret = ph->xops->xfer_get_init(ph, message_id, sizeof(*notify), 0, &t); 756 if (ret) 757 return ret; 758 759 notify = t->tx.buf; 760 notify->domain = cpu_to_le32(domain); 761 notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0; 762 763 ret = ph->xops->do_xfer(ph, t); 764 765 ph->xops->xfer_put(ph, t); 766 return ret; 767} 768 769static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph, 770 u32 domain, struct scmi_fc_info **p_fc) 771{ 772 struct scmi_fc_info *fc; 773 774 fc = devm_kcalloc(ph->dev, PERF_FC_MAX, sizeof(*fc), GFP_KERNEL); 775 if (!fc) 776 return; 777 778 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 779 PERF_LEVEL_SET, 4, domain, 780 &fc[PERF_FC_LEVEL].set_addr, 781 &fc[PERF_FC_LEVEL].set_db); 782 783 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 784 PERF_LEVEL_GET, 4, domain, 785 &fc[PERF_FC_LEVEL].get_addr, NULL); 786 787 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 788 PERF_LIMITS_SET, 8, domain, 789 &fc[PERF_FC_LIMIT].set_addr, 790 &fc[PERF_FC_LIMIT].set_db); 791 792 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 793 PERF_LIMITS_GET, 8, domain, 794 &fc[PERF_FC_LIMIT].get_addr, NULL); 795 796 *p_fc = fc; 797} 798 799/* Device specific ops */ 800static int scmi_dev_domain_id(struct device *dev) 801{ 802 struct of_phandle_args clkspec; 803 804 if (of_parse_phandle_with_args(dev->of_node, "clocks", "#clock-cells", 805 0, &clkspec)) 806 return -EINVAL; 807 808 return clkspec.args[0]; 809} 810 811static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph, 812 struct device *dev) 813{ 814 int idx, ret, domain; 815 unsigned long freq; 816 struct perf_dom_info *dom; 817 818 domain = scmi_dev_domain_id(dev); 819 if (domain < 0) 820 return -EINVAL; 821 822 dom = scmi_perf_domain_lookup(ph, domain); 823 if (IS_ERR(dom)) 824 return PTR_ERR(dom); 825 826 for (idx = 0; idx < dom->opp_count; idx++) { 827 if (!dom->level_indexing_mode) 828 freq = dom->opp[idx].perf * dom->mult_factor; 829 else 830 freq = dom->opp[idx].indicative_freq * dom->mult_factor; 831 832 ret = dev_pm_opp_add(dev, freq, 0); 833 if (ret) { 834 dev_warn(dev, "failed to add opp %luHz\n", freq); 835 dev_pm_opp_remove_all_dynamic(dev); 836 return ret; 837 } 838 839 dev_dbg(dev, "[%d][%s]:: Registered OPP[%d] %lu\n", 840 domain, dom->info.name, idx, freq); 841 } 842 return 0; 843} 844 845static int 846scmi_dvfs_transition_latency_get(const struct scmi_protocol_handle *ph, 847 struct device *dev) 848{ 849 int domain; 850 struct perf_dom_info *dom; 851 852 domain = scmi_dev_domain_id(dev); 853 if (domain < 0) 854 return -EINVAL; 855 856 dom = scmi_perf_domain_lookup(ph, domain); 857 if (IS_ERR(dom)) 858 return PTR_ERR(dom); 859 860 /* uS to nS */ 861 return dom->opp[dom->opp_count - 1].trans_latency_us * 1000; 862} 863 864static int scmi_dvfs_freq_set(const struct scmi_protocol_handle *ph, u32 domain, 865 unsigned long freq, bool poll) 866{ 867 unsigned int level; 868 struct perf_dom_info *dom; 869 870 dom = scmi_perf_domain_lookup(ph, domain); 871 if (IS_ERR(dom)) 872 return PTR_ERR(dom); 873 874 if (!dom->level_indexing_mode) { 875 level = freq / dom->mult_factor; 876 } else { 877 struct scmi_opp *opp; 878 879 opp = LOOKUP_BY_FREQ(dom->opps_by_freq, 880 freq / dom->mult_factor); 881 if (!opp) 882 return -EIO; 883 884 level = opp->level_index; 885 } 886 887 return __scmi_perf_level_set(ph, dom, level, poll); 888} 889 890static int scmi_dvfs_freq_get(const struct scmi_protocol_handle *ph, u32 domain, 891 unsigned long *freq, bool poll) 892{ 893 int ret; 894 u32 level; 895 struct perf_dom_info *dom; 896 897 dom = scmi_perf_domain_lookup(ph, domain); 898 if (IS_ERR(dom)) 899 return PTR_ERR(dom); 900 901 ret = __scmi_perf_level_get(ph, dom, &level, poll); 902 if (ret) 903 return ret; 904 905 if (!dom->level_indexing_mode) { 906 *freq = level * dom->mult_factor; 907 } else { 908 struct scmi_opp *opp; 909 910 opp = xa_load(&dom->opps_by_idx, level); 911 if (!opp) 912 return -EIO; 913 914 *freq = opp->indicative_freq * dom->mult_factor; 915 } 916 917 return ret; 918} 919 920static int scmi_dvfs_est_power_get(const struct scmi_protocol_handle *ph, 921 u32 domain, unsigned long *freq, 922 unsigned long *power) 923{ 924 struct perf_dom_info *dom; 925 unsigned long opp_freq; 926 int idx, ret = -EINVAL; 927 struct scmi_opp *opp; 928 929 dom = scmi_perf_domain_lookup(ph, domain); 930 if (IS_ERR(dom)) 931 return PTR_ERR(dom); 932 933 for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) { 934 if (!dom->level_indexing_mode) 935 opp_freq = opp->perf * dom->mult_factor; 936 else 937 opp_freq = opp->indicative_freq * dom->mult_factor; 938 939 if (opp_freq < *freq) 940 continue; 941 942 *freq = opp_freq; 943 *power = opp->power; 944 ret = 0; 945 break; 946 } 947 948 return ret; 949} 950 951static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph, 952 struct device *dev) 953{ 954 int domain; 955 struct perf_dom_info *dom; 956 957 domain = scmi_dev_domain_id(dev); 958 if (domain < 0) 959 return false; 960 961 dom = scmi_perf_domain_lookup(ph, domain); 962 if (IS_ERR(dom)) 963 return false; 964 965 return dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr; 966} 967 968static enum scmi_power_scale 969scmi_power_scale_get(const struct scmi_protocol_handle *ph) 970{ 971 struct scmi_perf_info *pi = ph->get_priv(ph); 972 973 return pi->power_scale; 974} 975 976static const struct scmi_perf_proto_ops perf_proto_ops = { 977 .num_domains_get = scmi_perf_num_domains_get, 978 .info_get = scmi_perf_info_get, 979 .limits_set = scmi_perf_limits_set, 980 .limits_get = scmi_perf_limits_get, 981 .level_set = scmi_perf_level_set, 982 .level_get = scmi_perf_level_get, 983 .device_domain_id = scmi_dev_domain_id, 984 .transition_latency_get = scmi_dvfs_transition_latency_get, 985 .device_opps_add = scmi_dvfs_device_opps_add, 986 .freq_set = scmi_dvfs_freq_set, 987 .freq_get = scmi_dvfs_freq_get, 988 .est_power_get = scmi_dvfs_est_power_get, 989 .fast_switch_possible = scmi_fast_switch_possible, 990 .power_scale_get = scmi_power_scale_get, 991}; 992 993static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph, 994 u8 evt_id, u32 src_id, bool enable) 995{ 996 int ret, cmd_id; 997 998 if (evt_id >= ARRAY_SIZE(evt_2_cmd)) 999 return -EINVAL; 1000 1001 cmd_id = evt_2_cmd[evt_id]; 1002 ret = scmi_perf_level_limits_notify(ph, src_id, cmd_id, enable); 1003 if (ret) 1004 pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n", 1005 evt_id, src_id, ret); 1006 1007 return ret; 1008} 1009 1010static void *scmi_perf_fill_custom_report(const struct scmi_protocol_handle *ph, 1011 u8 evt_id, ktime_t timestamp, 1012 const void *payld, size_t payld_sz, 1013 void *report, u32 *src_id) 1014{ 1015 void *rep = NULL; 1016 1017 switch (evt_id) { 1018 case SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED: 1019 { 1020 const struct scmi_perf_limits_notify_payld *p = payld; 1021 struct scmi_perf_limits_report *r = report; 1022 1023 if (sizeof(*p) != payld_sz) 1024 break; 1025 1026 r->timestamp = timestamp; 1027 r->agent_id = le32_to_cpu(p->agent_id); 1028 r->domain_id = le32_to_cpu(p->domain_id); 1029 r->range_max = le32_to_cpu(p->range_max); 1030 r->range_min = le32_to_cpu(p->range_min); 1031 *src_id = r->domain_id; 1032 rep = r; 1033 break; 1034 } 1035 case SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED: 1036 { 1037 const struct scmi_perf_level_notify_payld *p = payld; 1038 struct scmi_perf_level_report *r = report; 1039 1040 if (sizeof(*p) != payld_sz) 1041 break; 1042 1043 r->timestamp = timestamp; 1044 r->agent_id = le32_to_cpu(p->agent_id); 1045 r->domain_id = le32_to_cpu(p->domain_id); 1046 r->performance_level = le32_to_cpu(p->performance_level); 1047 *src_id = r->domain_id; 1048 rep = r; 1049 break; 1050 } 1051 default: 1052 break; 1053 } 1054 1055 return rep; 1056} 1057 1058static int scmi_perf_get_num_sources(const struct scmi_protocol_handle *ph) 1059{ 1060 struct scmi_perf_info *pi = ph->get_priv(ph); 1061 1062 if (!pi) 1063 return -EINVAL; 1064 1065 return pi->num_domains; 1066} 1067 1068static const struct scmi_event perf_events[] = { 1069 { 1070 .id = SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED, 1071 .max_payld_sz = sizeof(struct scmi_perf_limits_notify_payld), 1072 .max_report_sz = sizeof(struct scmi_perf_limits_report), 1073 }, 1074 { 1075 .id = SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED, 1076 .max_payld_sz = sizeof(struct scmi_perf_level_notify_payld), 1077 .max_report_sz = sizeof(struct scmi_perf_level_report), 1078 }, 1079}; 1080 1081static const struct scmi_event_ops perf_event_ops = { 1082 .get_num_sources = scmi_perf_get_num_sources, 1083 .set_notify_enabled = scmi_perf_set_notify_enabled, 1084 .fill_custom_report = scmi_perf_fill_custom_report, 1085}; 1086 1087static const struct scmi_protocol_events perf_protocol_events = { 1088 .queue_sz = SCMI_PROTO_QUEUE_SZ, 1089 .ops = &perf_event_ops, 1090 .evts = perf_events, 1091 .num_events = ARRAY_SIZE(perf_events), 1092}; 1093 1094static int scmi_perf_protocol_init(const struct scmi_protocol_handle *ph) 1095{ 1096 int domain, ret; 1097 u32 version; 1098 struct scmi_perf_info *pinfo; 1099 1100 ret = ph->xops->version_get(ph, &version); 1101 if (ret) 1102 return ret; 1103 1104 dev_dbg(ph->dev, "Performance Version %d.%d\n", 1105 PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); 1106 1107 pinfo = devm_kzalloc(ph->dev, sizeof(*pinfo), GFP_KERNEL); 1108 if (!pinfo) 1109 return -ENOMEM; 1110 1111 pinfo->version = version; 1112 1113 ret = scmi_perf_attributes_get(ph, pinfo); 1114 if (ret) 1115 return ret; 1116 1117 pinfo->dom_info = devm_kcalloc(ph->dev, pinfo->num_domains, 1118 sizeof(*pinfo->dom_info), GFP_KERNEL); 1119 if (!pinfo->dom_info) 1120 return -ENOMEM; 1121 1122 for (domain = 0; domain < pinfo->num_domains; domain++) { 1123 struct perf_dom_info *dom = pinfo->dom_info + domain; 1124 1125 dom->id = domain; 1126 scmi_perf_domain_attributes_get(ph, dom, version); 1127 scmi_perf_describe_levels_get(ph, dom, version); 1128 1129 if (dom->perf_fastchannels) 1130 scmi_perf_domain_init_fc(ph, dom->id, &dom->fc_info); 1131 } 1132 1133 ret = devm_add_action_or_reset(ph->dev, scmi_perf_xa_destroy, pinfo); 1134 if (ret) 1135 return ret; 1136 1137 return ph->set_priv(ph, pinfo); 1138} 1139 1140static const struct scmi_protocol scmi_perf = { 1141 .id = SCMI_PROTOCOL_PERF, 1142 .owner = THIS_MODULE, 1143 .instance_init = &scmi_perf_protocol_init, 1144 .ops = &perf_proto_ops, 1145 .events = &perf_protocol_events, 1146}; 1147 1148DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(perf, scmi_perf) 1149