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/* Updated only after ALL the mandatory features for that version are merged */ 28#define SCMI_PROTOCOL_SUPPORTED_VERSION 0x40000 29 30#define MAX_OPPS 32 31 32enum scmi_performance_protocol_cmd { 33 PERF_DOMAIN_ATTRIBUTES = 0x3, 34 PERF_DESCRIBE_LEVELS = 0x4, 35 PERF_LIMITS_SET = 0x5, 36 PERF_LIMITS_GET = 0x6, 37 PERF_LEVEL_SET = 0x7, 38 PERF_LEVEL_GET = 0x8, 39 PERF_NOTIFY_LIMITS = 0x9, 40 PERF_NOTIFY_LEVEL = 0xa, 41 PERF_DESCRIBE_FASTCHANNEL = 0xb, 42 PERF_DOMAIN_NAME_GET = 0xc, 43}; 44 45enum { 46 PERF_FC_LEVEL, 47 PERF_FC_LIMIT, 48 PERF_FC_MAX, 49}; 50 51struct scmi_opp { 52 u32 perf; 53 u32 power; 54 u32 trans_latency_us; 55 u32 indicative_freq; 56 u32 level_index; 57 struct hlist_node hash; 58}; 59 60struct scmi_msg_resp_perf_attributes { 61 __le16 num_domains; 62 __le16 flags; 63#define POWER_SCALE_IN_MILLIWATT(x) ((x) & BIT(0)) 64#define POWER_SCALE_IN_MICROWATT(x) ((x) & BIT(1)) 65 __le32 stats_addr_low; 66 __le32 stats_addr_high; 67 __le32 stats_size; 68}; 69 70struct scmi_msg_resp_perf_domain_attributes { 71 __le32 flags; 72#define SUPPORTS_SET_LIMITS(x) ((x) & BIT(31)) 73#define SUPPORTS_SET_PERF_LVL(x) ((x) & BIT(30)) 74#define SUPPORTS_PERF_LIMIT_NOTIFY(x) ((x) & BIT(29)) 75#define SUPPORTS_PERF_LEVEL_NOTIFY(x) ((x) & BIT(28)) 76#define SUPPORTS_PERF_FASTCHANNELS(x) ((x) & BIT(27)) 77#define SUPPORTS_EXTENDED_NAMES(x) ((x) & BIT(26)) 78#define SUPPORTS_LEVEL_INDEXING(x) ((x) & BIT(25)) 79 __le32 rate_limit_us; 80 __le32 sustained_freq_khz; 81 __le32 sustained_perf_level; 82 u8 name[SCMI_SHORT_NAME_MAX_SIZE]; 83}; 84 85struct scmi_msg_perf_describe_levels { 86 __le32 domain; 87 __le32 level_index; 88}; 89 90struct scmi_perf_set_limits { 91 __le32 domain; 92 __le32 max_level; 93 __le32 min_level; 94}; 95 96struct scmi_perf_get_limits { 97 __le32 max_level; 98 __le32 min_level; 99}; 100 101struct scmi_perf_set_level { 102 __le32 domain; 103 __le32 level; 104}; 105 106struct scmi_perf_notify_level_or_limits { 107 __le32 domain; 108 __le32 notify_enable; 109}; 110 111struct scmi_perf_limits_notify_payld { 112 __le32 agent_id; 113 __le32 domain_id; 114 __le32 range_max; 115 __le32 range_min; 116}; 117 118struct scmi_perf_level_notify_payld { 119 __le32 agent_id; 120 __le32 domain_id; 121 __le32 performance_level; 122}; 123 124struct scmi_msg_resp_perf_describe_levels { 125 __le16 num_returned; 126 __le16 num_remaining; 127 struct { 128 __le32 perf_val; 129 __le32 power; 130 __le16 transition_latency_us; 131 __le16 reserved; 132 } opp[]; 133}; 134 135struct scmi_msg_resp_perf_describe_levels_v4 { 136 __le16 num_returned; 137 __le16 num_remaining; 138 struct { 139 __le32 perf_val; 140 __le32 power; 141 __le16 transition_latency_us; 142 __le16 reserved; 143 __le32 indicative_freq; 144 __le32 level_index; 145 } opp[]; 146}; 147 148struct perf_dom_info { 149 u32 id; 150 bool set_limits; 151 bool perf_limit_notify; 152 bool perf_level_notify; 153 bool perf_fastchannels; 154 bool level_indexing_mode; 155 u32 opp_count; 156 u32 rate_limit_us; 157 u32 sustained_freq_khz; 158 u32 sustained_perf_level; 159 unsigned long mult_factor; 160 struct scmi_perf_domain_info info; 161 struct scmi_opp opp[MAX_OPPS]; 162 struct scmi_fc_info *fc_info; 163 struct xarray opps_by_idx; 164 struct xarray opps_by_lvl; 165 DECLARE_HASHTABLE(opps_by_freq, ilog2(MAX_OPPS)); 166}; 167 168#define LOOKUP_BY_FREQ(__htp, __freq) \ 169({ \ 170 /* u32 cast is needed to pick right hash func */ \ 171 u32 f_ = (u32)(__freq); \ 172 struct scmi_opp *_opp; \ 173 \ 174 hash_for_each_possible((__htp), _opp, hash, f_) \ 175 if (_opp->indicative_freq == f_) \ 176 break; \ 177 _opp; \ 178}) 179 180struct scmi_perf_info { 181 u32 version; 182 u16 num_domains; 183 enum scmi_power_scale power_scale; 184 u64 stats_addr; 185 u32 stats_size; 186 bool notify_lvl_cmd; 187 bool notify_lim_cmd; 188 struct perf_dom_info *dom_info; 189}; 190 191static enum scmi_performance_protocol_cmd evt_2_cmd[] = { 192 PERF_NOTIFY_LIMITS, 193 PERF_NOTIFY_LEVEL, 194}; 195 196static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph, 197 struct scmi_perf_info *pi) 198{ 199 int ret; 200 struct scmi_xfer *t; 201 struct scmi_msg_resp_perf_attributes *attr; 202 203 ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0, 204 sizeof(*attr), &t); 205 if (ret) 206 return ret; 207 208 attr = t->rx.buf; 209 210 ret = ph->xops->do_xfer(ph, t); 211 if (!ret) { 212 u16 flags = le16_to_cpu(attr->flags); 213 214 pi->num_domains = le16_to_cpu(attr->num_domains); 215 216 if (POWER_SCALE_IN_MILLIWATT(flags)) 217 pi->power_scale = SCMI_POWER_MILLIWATTS; 218 if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3) 219 if (POWER_SCALE_IN_MICROWATT(flags)) 220 pi->power_scale = SCMI_POWER_MICROWATTS; 221 222 pi->stats_addr = le32_to_cpu(attr->stats_addr_low) | 223 (u64)le32_to_cpu(attr->stats_addr_high) << 32; 224 pi->stats_size = le32_to_cpu(attr->stats_size); 225 } 226 227 ph->xops->xfer_put(ph, t); 228 229 if (!ret) { 230 if (!ph->hops->protocol_msg_check(ph, PERF_NOTIFY_LEVEL, NULL)) 231 pi->notify_lvl_cmd = true; 232 233 if (!ph->hops->protocol_msg_check(ph, PERF_NOTIFY_LIMITS, NULL)) 234 pi->notify_lim_cmd = true; 235 } 236 237 return ret; 238} 239 240static void scmi_perf_xa_destroy(void *data) 241{ 242 int domain; 243 struct scmi_perf_info *pinfo = data; 244 245 for (domain = 0; domain < pinfo->num_domains; domain++) { 246 xa_destroy(&((pinfo->dom_info + domain)->opps_by_idx)); 247 xa_destroy(&((pinfo->dom_info + domain)->opps_by_lvl)); 248 } 249} 250 251static int 252scmi_perf_domain_attributes_get(const struct scmi_protocol_handle *ph, 253 struct perf_dom_info *dom_info, 254 bool notify_lim_cmd, bool notify_lvl_cmd, 255 u32 version) 256{ 257 int ret; 258 u32 flags; 259 struct scmi_xfer *t; 260 struct scmi_msg_resp_perf_domain_attributes *attr; 261 262 ret = ph->xops->xfer_get_init(ph, PERF_DOMAIN_ATTRIBUTES, 263 sizeof(dom_info->id), sizeof(*attr), &t); 264 if (ret) 265 return ret; 266 267 put_unaligned_le32(dom_info->id, t->tx.buf); 268 attr = t->rx.buf; 269 270 ret = ph->xops->do_xfer(ph, t); 271 if (!ret) { 272 flags = le32_to_cpu(attr->flags); 273 274 dom_info->set_limits = SUPPORTS_SET_LIMITS(flags); 275 dom_info->info.set_perf = SUPPORTS_SET_PERF_LVL(flags); 276 if (notify_lim_cmd) 277 dom_info->perf_limit_notify = 278 SUPPORTS_PERF_LIMIT_NOTIFY(flags); 279 if (notify_lvl_cmd) 280 dom_info->perf_level_notify = 281 SUPPORTS_PERF_LEVEL_NOTIFY(flags); 282 dom_info->perf_fastchannels = SUPPORTS_PERF_FASTCHANNELS(flags); 283 if (PROTOCOL_REV_MAJOR(version) >= 0x4) 284 dom_info->level_indexing_mode = 285 SUPPORTS_LEVEL_INDEXING(flags); 286 dom_info->rate_limit_us = le32_to_cpu(attr->rate_limit_us) & 287 GENMASK(19, 0); 288 dom_info->sustained_freq_khz = 289 le32_to_cpu(attr->sustained_freq_khz); 290 dom_info->sustained_perf_level = 291 le32_to_cpu(attr->sustained_perf_level); 292 /* 293 * sustained_freq_khz = mult_factor * sustained_perf_level 294 * mult_factor must be non zero positive integer(not fraction) 295 */ 296 if (!dom_info->sustained_freq_khz || 297 !dom_info->sustained_perf_level || 298 dom_info->level_indexing_mode) { 299 /* CPUFreq converts to kHz, hence default 1000 */ 300 dom_info->mult_factor = 1000; 301 } else { 302 dom_info->mult_factor = 303 (dom_info->sustained_freq_khz * 1000UL) 304 / dom_info->sustained_perf_level; 305 if ((dom_info->sustained_freq_khz * 1000UL) % 306 dom_info->sustained_perf_level) 307 dev_warn(ph->dev, 308 "multiplier for domain %d rounded\n", 309 dom_info->id); 310 } 311 if (!dom_info->mult_factor) 312 dev_warn(ph->dev, 313 "Wrong sustained perf/frequency(domain %d)\n", 314 dom_info->id); 315 316 strscpy(dom_info->info.name, attr->name, 317 SCMI_SHORT_NAME_MAX_SIZE); 318 } 319 320 ph->xops->xfer_put(ph, t); 321 322 /* 323 * If supported overwrite short name with the extended one; 324 * on error just carry on and use already provided short name. 325 */ 326 if (!ret && PROTOCOL_REV_MAJOR(version) >= 0x3 && 327 SUPPORTS_EXTENDED_NAMES(flags)) 328 ph->hops->extended_name_get(ph, PERF_DOMAIN_NAME_GET, 329 dom_info->id, NULL, dom_info->info.name, 330 SCMI_MAX_STR_SIZE); 331 332 xa_init(&dom_info->opps_by_lvl); 333 if (dom_info->level_indexing_mode) { 334 xa_init(&dom_info->opps_by_idx); 335 hash_init(dom_info->opps_by_freq); 336 } 337 338 return ret; 339} 340 341static int opp_cmp_func(const void *opp1, const void *opp2) 342{ 343 const struct scmi_opp *t1 = opp1, *t2 = opp2; 344 345 return t1->perf - t2->perf; 346} 347 348struct scmi_perf_ipriv { 349 u32 version; 350 struct perf_dom_info *perf_dom; 351}; 352 353static void iter_perf_levels_prepare_message(void *message, 354 unsigned int desc_index, 355 const void *priv) 356{ 357 struct scmi_msg_perf_describe_levels *msg = message; 358 const struct scmi_perf_ipriv *p = priv; 359 360 msg->domain = cpu_to_le32(p->perf_dom->id); 361 /* Set the number of OPPs to be skipped/already read */ 362 msg->level_index = cpu_to_le32(desc_index); 363} 364 365static int iter_perf_levels_update_state(struct scmi_iterator_state *st, 366 const void *response, void *priv) 367{ 368 const struct scmi_msg_resp_perf_describe_levels *r = response; 369 370 st->num_returned = le16_to_cpu(r->num_returned); 371 st->num_remaining = le16_to_cpu(r->num_remaining); 372 373 return 0; 374} 375 376static inline void 377process_response_opp(struct device *dev, struct perf_dom_info *dom, 378 struct scmi_opp *opp, unsigned int loop_idx, 379 const struct scmi_msg_resp_perf_describe_levels *r) 380{ 381 int ret; 382 383 opp->perf = le32_to_cpu(r->opp[loop_idx].perf_val); 384 opp->power = le32_to_cpu(r->opp[loop_idx].power); 385 opp->trans_latency_us = 386 le16_to_cpu(r->opp[loop_idx].transition_latency_us); 387 388 ret = xa_insert(&dom->opps_by_lvl, opp->perf, opp, GFP_KERNEL); 389 if (ret) 390 dev_warn(dev, "Failed to add opps_by_lvl at %d - ret:%d\n", 391 opp->perf, ret); 392} 393 394static inline void 395process_response_opp_v4(struct device *dev, struct perf_dom_info *dom, 396 struct scmi_opp *opp, unsigned int loop_idx, 397 const struct scmi_msg_resp_perf_describe_levels_v4 *r) 398{ 399 int ret; 400 401 opp->perf = le32_to_cpu(r->opp[loop_idx].perf_val); 402 opp->power = le32_to_cpu(r->opp[loop_idx].power); 403 opp->trans_latency_us = 404 le16_to_cpu(r->opp[loop_idx].transition_latency_us); 405 406 ret = xa_insert(&dom->opps_by_lvl, opp->perf, opp, GFP_KERNEL); 407 if (ret) 408 dev_warn(dev, "Failed to add opps_by_lvl at %d - ret:%d\n", 409 opp->perf, ret); 410 411 /* Note that PERF v4 reports always five 32-bit words */ 412 opp->indicative_freq = le32_to_cpu(r->opp[loop_idx].indicative_freq); 413 if (dom->level_indexing_mode) { 414 opp->level_index = le32_to_cpu(r->opp[loop_idx].level_index); 415 416 ret = xa_insert(&dom->opps_by_idx, opp->level_index, opp, 417 GFP_KERNEL); 418 if (ret) 419 dev_warn(dev, 420 "Failed to add opps_by_idx at %d - ret:%d\n", 421 opp->level_index, ret); 422 423 hash_add(dom->opps_by_freq, &opp->hash, opp->indicative_freq); 424 } 425} 426 427static int 428iter_perf_levels_process_response(const struct scmi_protocol_handle *ph, 429 const void *response, 430 struct scmi_iterator_state *st, void *priv) 431{ 432 struct scmi_opp *opp; 433 struct scmi_perf_ipriv *p = priv; 434 435 opp = &p->perf_dom->opp[st->desc_index + st->loop_idx]; 436 if (PROTOCOL_REV_MAJOR(p->version) <= 0x3) 437 process_response_opp(ph->dev, p->perf_dom, opp, st->loop_idx, 438 response); 439 else 440 process_response_opp_v4(ph->dev, p->perf_dom, opp, st->loop_idx, 441 response); 442 p->perf_dom->opp_count++; 443 444 dev_dbg(ph->dev, "Level %d Power %d Latency %dus Ifreq %d Index %d\n", 445 opp->perf, opp->power, opp->trans_latency_us, 446 opp->indicative_freq, opp->level_index); 447 448 return 0; 449} 450 451static int 452scmi_perf_describe_levels_get(const struct scmi_protocol_handle *ph, 453 struct perf_dom_info *perf_dom, u32 version) 454{ 455 int ret; 456 void *iter; 457 struct scmi_iterator_ops ops = { 458 .prepare_message = iter_perf_levels_prepare_message, 459 .update_state = iter_perf_levels_update_state, 460 .process_response = iter_perf_levels_process_response, 461 }; 462 struct scmi_perf_ipriv ppriv = { 463 .version = version, 464 .perf_dom = perf_dom, 465 }; 466 467 iter = ph->hops->iter_response_init(ph, &ops, MAX_OPPS, 468 PERF_DESCRIBE_LEVELS, 469 sizeof(struct scmi_msg_perf_describe_levels), 470 &ppriv); 471 if (IS_ERR(iter)) 472 return PTR_ERR(iter); 473 474 ret = ph->hops->iter_response_run(iter); 475 if (ret) 476 return ret; 477 478 if (perf_dom->opp_count) 479 sort(perf_dom->opp, perf_dom->opp_count, 480 sizeof(struct scmi_opp), opp_cmp_func, NULL); 481 482 return ret; 483} 484 485static int scmi_perf_num_domains_get(const struct scmi_protocol_handle *ph) 486{ 487 struct scmi_perf_info *pi = ph->get_priv(ph); 488 489 return pi->num_domains; 490} 491 492static inline struct perf_dom_info * 493scmi_perf_domain_lookup(const struct scmi_protocol_handle *ph, u32 domain) 494{ 495 struct scmi_perf_info *pi = ph->get_priv(ph); 496 497 if (domain >= pi->num_domains) 498 return ERR_PTR(-EINVAL); 499 500 return pi->dom_info + domain; 501} 502 503static const struct scmi_perf_domain_info * 504scmi_perf_info_get(const struct scmi_protocol_handle *ph, u32 domain) 505{ 506 struct perf_dom_info *dom; 507 508 dom = scmi_perf_domain_lookup(ph, domain); 509 if (IS_ERR(dom)) 510 return ERR_PTR(-EINVAL); 511 512 return &dom->info; 513} 514 515static int scmi_perf_msg_limits_set(const struct scmi_protocol_handle *ph, 516 u32 domain, u32 max_perf, u32 min_perf) 517{ 518 int ret; 519 struct scmi_xfer *t; 520 struct scmi_perf_set_limits *limits; 521 522 ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_SET, 523 sizeof(*limits), 0, &t); 524 if (ret) 525 return ret; 526 527 limits = t->tx.buf; 528 limits->domain = cpu_to_le32(domain); 529 limits->max_level = cpu_to_le32(max_perf); 530 limits->min_level = cpu_to_le32(min_perf); 531 532 ret = ph->xops->do_xfer(ph, t); 533 534 ph->xops->xfer_put(ph, t); 535 return ret; 536} 537 538static int __scmi_perf_limits_set(const struct scmi_protocol_handle *ph, 539 struct perf_dom_info *dom, u32 max_perf, 540 u32 min_perf) 541{ 542 if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].set_addr) { 543 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT]; 544 545 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_SET, 546 dom->id, min_perf, max_perf); 547 iowrite32(max_perf, fci->set_addr); 548 iowrite32(min_perf, fci->set_addr + 4); 549 ph->hops->fastchannel_db_ring(fci->set_db); 550 return 0; 551 } 552 553 return scmi_perf_msg_limits_set(ph, dom->id, max_perf, min_perf); 554} 555 556static int scmi_perf_limits_set(const struct scmi_protocol_handle *ph, 557 u32 domain, u32 max_perf, u32 min_perf) 558{ 559 struct scmi_perf_info *pi = ph->get_priv(ph); 560 struct perf_dom_info *dom; 561 562 dom = scmi_perf_domain_lookup(ph, domain); 563 if (IS_ERR(dom)) 564 return PTR_ERR(dom); 565 566 if (!dom->set_limits) 567 return -EOPNOTSUPP; 568 569 if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3 && !max_perf && !min_perf) 570 return -EINVAL; 571 572 if (dom->level_indexing_mode) { 573 struct scmi_opp *opp; 574 575 if (min_perf) { 576 opp = xa_load(&dom->opps_by_lvl, min_perf); 577 if (!opp) 578 return -EIO; 579 580 min_perf = opp->level_index; 581 } 582 583 if (max_perf) { 584 opp = xa_load(&dom->opps_by_lvl, max_perf); 585 if (!opp) 586 return -EIO; 587 588 max_perf = opp->level_index; 589 } 590 } 591 592 return __scmi_perf_limits_set(ph, dom, max_perf, min_perf); 593} 594 595static int scmi_perf_msg_limits_get(const struct scmi_protocol_handle *ph, 596 u32 domain, u32 *max_perf, u32 *min_perf) 597{ 598 int ret; 599 struct scmi_xfer *t; 600 struct scmi_perf_get_limits *limits; 601 602 ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_GET, 603 sizeof(__le32), 0, &t); 604 if (ret) 605 return ret; 606 607 put_unaligned_le32(domain, t->tx.buf); 608 609 ret = ph->xops->do_xfer(ph, t); 610 if (!ret) { 611 limits = t->rx.buf; 612 613 *max_perf = le32_to_cpu(limits->max_level); 614 *min_perf = le32_to_cpu(limits->min_level); 615 } 616 617 ph->xops->xfer_put(ph, t); 618 return ret; 619} 620 621static int __scmi_perf_limits_get(const struct scmi_protocol_handle *ph, 622 struct perf_dom_info *dom, u32 *max_perf, 623 u32 *min_perf) 624{ 625 if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].get_addr) { 626 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT]; 627 628 *max_perf = ioread32(fci->get_addr); 629 *min_perf = ioread32(fci->get_addr + 4); 630 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_GET, 631 dom->id, *min_perf, *max_perf); 632 return 0; 633 } 634 635 return scmi_perf_msg_limits_get(ph, dom->id, max_perf, min_perf); 636} 637 638static int scmi_perf_limits_get(const struct scmi_protocol_handle *ph, 639 u32 domain, u32 *max_perf, u32 *min_perf) 640{ 641 int ret; 642 struct perf_dom_info *dom; 643 644 dom = scmi_perf_domain_lookup(ph, domain); 645 if (IS_ERR(dom)) 646 return PTR_ERR(dom); 647 648 ret = __scmi_perf_limits_get(ph, dom, max_perf, min_perf); 649 if (ret) 650 return ret; 651 652 if (dom->level_indexing_mode) { 653 struct scmi_opp *opp; 654 655 opp = xa_load(&dom->opps_by_idx, *min_perf); 656 if (!opp) 657 return -EIO; 658 659 *min_perf = opp->perf; 660 661 opp = xa_load(&dom->opps_by_idx, *max_perf); 662 if (!opp) 663 return -EIO; 664 665 *max_perf = opp->perf; 666 } 667 668 return 0; 669} 670 671static int scmi_perf_msg_level_set(const struct scmi_protocol_handle *ph, 672 u32 domain, u32 level, bool poll) 673{ 674 int ret; 675 struct scmi_xfer *t; 676 struct scmi_perf_set_level *lvl; 677 678 ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_SET, sizeof(*lvl), 0, &t); 679 if (ret) 680 return ret; 681 682 t->hdr.poll_completion = poll; 683 lvl = t->tx.buf; 684 lvl->domain = cpu_to_le32(domain); 685 lvl->level = cpu_to_le32(level); 686 687 ret = ph->xops->do_xfer(ph, t); 688 689 ph->xops->xfer_put(ph, t); 690 return ret; 691} 692 693static int __scmi_perf_level_set(const struct scmi_protocol_handle *ph, 694 struct perf_dom_info *dom, u32 level, 695 bool poll) 696{ 697 if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr) { 698 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LEVEL]; 699 700 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_SET, 701 dom->id, level, 0); 702 iowrite32(level, fci->set_addr); 703 ph->hops->fastchannel_db_ring(fci->set_db); 704 return 0; 705 } 706 707 return scmi_perf_msg_level_set(ph, dom->id, level, poll); 708} 709 710static int scmi_perf_level_set(const struct scmi_protocol_handle *ph, 711 u32 domain, u32 level, bool poll) 712{ 713 struct perf_dom_info *dom; 714 715 dom = scmi_perf_domain_lookup(ph, domain); 716 if (IS_ERR(dom)) 717 return PTR_ERR(dom); 718 719 if (!dom->info.set_perf) 720 return -EOPNOTSUPP; 721 722 if (dom->level_indexing_mode) { 723 struct scmi_opp *opp; 724 725 opp = xa_load(&dom->opps_by_lvl, level); 726 if (!opp) 727 return -EIO; 728 729 level = opp->level_index; 730 } 731 732 return __scmi_perf_level_set(ph, dom, level, poll); 733} 734 735static int scmi_perf_msg_level_get(const struct scmi_protocol_handle *ph, 736 u32 domain, u32 *level, bool poll) 737{ 738 int ret; 739 struct scmi_xfer *t; 740 741 ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_GET, 742 sizeof(u32), sizeof(u32), &t); 743 if (ret) 744 return ret; 745 746 t->hdr.poll_completion = poll; 747 put_unaligned_le32(domain, t->tx.buf); 748 749 ret = ph->xops->do_xfer(ph, t); 750 if (!ret) 751 *level = get_unaligned_le32(t->rx.buf); 752 753 ph->xops->xfer_put(ph, t); 754 return ret; 755} 756 757static int __scmi_perf_level_get(const struct scmi_protocol_handle *ph, 758 struct perf_dom_info *dom, u32 *level, 759 bool poll) 760{ 761 if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].get_addr) { 762 *level = ioread32(dom->fc_info[PERF_FC_LEVEL].get_addr); 763 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_GET, 764 dom->id, *level, 0); 765 return 0; 766 } 767 768 return scmi_perf_msg_level_get(ph, dom->id, level, poll); 769} 770 771static int scmi_perf_level_get(const struct scmi_protocol_handle *ph, 772 u32 domain, u32 *level, bool poll) 773{ 774 int ret; 775 struct perf_dom_info *dom; 776 777 dom = scmi_perf_domain_lookup(ph, domain); 778 if (IS_ERR(dom)) 779 return PTR_ERR(dom); 780 781 ret = __scmi_perf_level_get(ph, dom, level, poll); 782 if (ret) 783 return ret; 784 785 if (dom->level_indexing_mode) { 786 struct scmi_opp *opp; 787 788 opp = xa_load(&dom->opps_by_idx, *level); 789 if (!opp) 790 return -EIO; 791 792 *level = opp->perf; 793 } 794 795 return 0; 796} 797 798static int scmi_perf_level_limits_notify(const struct scmi_protocol_handle *ph, 799 u32 domain, int message_id, 800 bool enable) 801{ 802 int ret; 803 struct scmi_xfer *t; 804 struct scmi_perf_notify_level_or_limits *notify; 805 806 ret = ph->xops->xfer_get_init(ph, message_id, sizeof(*notify), 0, &t); 807 if (ret) 808 return ret; 809 810 notify = t->tx.buf; 811 notify->domain = cpu_to_le32(domain); 812 notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0; 813 814 ret = ph->xops->do_xfer(ph, t); 815 816 ph->xops->xfer_put(ph, t); 817 return ret; 818} 819 820static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph, 821 struct perf_dom_info *dom) 822{ 823 struct scmi_fc_info *fc; 824 825 fc = devm_kcalloc(ph->dev, PERF_FC_MAX, sizeof(*fc), GFP_KERNEL); 826 if (!fc) 827 return; 828 829 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 830 PERF_LEVEL_GET, 4, dom->id, 831 &fc[PERF_FC_LEVEL].get_addr, NULL, 832 &fc[PERF_FC_LEVEL].rate_limit); 833 834 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 835 PERF_LIMITS_GET, 8, dom->id, 836 &fc[PERF_FC_LIMIT].get_addr, NULL, 837 &fc[PERF_FC_LIMIT].rate_limit); 838 839 if (dom->info.set_perf) 840 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 841 PERF_LEVEL_SET, 4, dom->id, 842 &fc[PERF_FC_LEVEL].set_addr, 843 &fc[PERF_FC_LEVEL].set_db, 844 &fc[PERF_FC_LEVEL].rate_limit); 845 846 if (dom->set_limits) 847 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 848 PERF_LIMITS_SET, 8, dom->id, 849 &fc[PERF_FC_LIMIT].set_addr, 850 &fc[PERF_FC_LIMIT].set_db, 851 &fc[PERF_FC_LIMIT].rate_limit); 852 853 dom->fc_info = fc; 854} 855 856static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph, 857 struct device *dev, u32 domain) 858{ 859 int idx, ret; 860 unsigned long freq; 861 struct dev_pm_opp_data data = {}; 862 struct perf_dom_info *dom; 863 864 dom = scmi_perf_domain_lookup(ph, domain); 865 if (IS_ERR(dom)) 866 return PTR_ERR(dom); 867 868 for (idx = 0; idx < dom->opp_count; idx++) { 869 if (!dom->level_indexing_mode) 870 freq = dom->opp[idx].perf * dom->mult_factor; 871 else 872 freq = dom->opp[idx].indicative_freq * dom->mult_factor; 873 874 /* All OPPs above the sustained frequency are treated as turbo */ 875 data.turbo = freq > dom->sustained_freq_khz * 1000; 876 877 data.level = dom->opp[idx].perf; 878 data.freq = freq; 879 880 ret = dev_pm_opp_add_dynamic(dev, &data); 881 if (ret) { 882 dev_warn(dev, "failed to add opp %luHz\n", freq); 883 dev_pm_opp_remove_all_dynamic(dev); 884 return ret; 885 } 886 887 dev_dbg(dev, "[%d][%s]:: Registered OPP[%d] %lu\n", 888 domain, dom->info.name, idx, freq); 889 } 890 return 0; 891} 892 893static int 894scmi_dvfs_transition_latency_get(const struct scmi_protocol_handle *ph, 895 u32 domain) 896{ 897 struct perf_dom_info *dom; 898 899 dom = scmi_perf_domain_lookup(ph, domain); 900 if (IS_ERR(dom)) 901 return PTR_ERR(dom); 902 903 /* uS to nS */ 904 return dom->opp[dom->opp_count - 1].trans_latency_us * 1000; 905} 906 907static int 908scmi_dvfs_rate_limit_get(const struct scmi_protocol_handle *ph, 909 u32 domain, u32 *rate_limit) 910{ 911 struct perf_dom_info *dom; 912 913 if (!rate_limit) 914 return -EINVAL; 915 916 dom = scmi_perf_domain_lookup(ph, domain); 917 if (IS_ERR(dom)) 918 return PTR_ERR(dom); 919 920 *rate_limit = dom->rate_limit_us; 921 return 0; 922} 923 924static int scmi_dvfs_freq_set(const struct scmi_protocol_handle *ph, u32 domain, 925 unsigned long freq, bool poll) 926{ 927 unsigned int level; 928 struct perf_dom_info *dom; 929 930 dom = scmi_perf_domain_lookup(ph, domain); 931 if (IS_ERR(dom)) 932 return PTR_ERR(dom); 933 934 if (!dom->level_indexing_mode) { 935 level = freq / dom->mult_factor; 936 } else { 937 struct scmi_opp *opp; 938 939 opp = LOOKUP_BY_FREQ(dom->opps_by_freq, 940 freq / dom->mult_factor); 941 if (!opp) 942 return -EIO; 943 944 level = opp->level_index; 945 } 946 947 return __scmi_perf_level_set(ph, dom, level, poll); 948} 949 950static int scmi_dvfs_freq_get(const struct scmi_protocol_handle *ph, u32 domain, 951 unsigned long *freq, bool poll) 952{ 953 int ret; 954 u32 level; 955 struct perf_dom_info *dom; 956 957 dom = scmi_perf_domain_lookup(ph, domain); 958 if (IS_ERR(dom)) 959 return PTR_ERR(dom); 960 961 ret = __scmi_perf_level_get(ph, dom, &level, poll); 962 if (ret) 963 return ret; 964 965 if (!dom->level_indexing_mode) { 966 *freq = level * dom->mult_factor; 967 } else { 968 struct scmi_opp *opp; 969 970 opp = xa_load(&dom->opps_by_idx, level); 971 if (!opp) 972 return -EIO; 973 974 *freq = opp->indicative_freq * dom->mult_factor; 975 } 976 977 return ret; 978} 979 980static int scmi_dvfs_est_power_get(const struct scmi_protocol_handle *ph, 981 u32 domain, unsigned long *freq, 982 unsigned long *power) 983{ 984 struct perf_dom_info *dom; 985 unsigned long opp_freq; 986 int idx, ret = -EINVAL; 987 struct scmi_opp *opp; 988 989 dom = scmi_perf_domain_lookup(ph, domain); 990 if (IS_ERR(dom)) 991 return PTR_ERR(dom); 992 993 for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) { 994 if (!dom->level_indexing_mode) 995 opp_freq = opp->perf * dom->mult_factor; 996 else 997 opp_freq = opp->indicative_freq * dom->mult_factor; 998 999 if (opp_freq < *freq) 1000 continue; 1001 1002 *freq = opp_freq; 1003 *power = opp->power; 1004 ret = 0; 1005 break; 1006 } 1007 1008 return ret; 1009} 1010 1011static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph, 1012 u32 domain) 1013{ 1014 struct perf_dom_info *dom; 1015 1016 dom = scmi_perf_domain_lookup(ph, domain); 1017 if (IS_ERR(dom)) 1018 return false; 1019 1020 return dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr; 1021} 1022 1023static int scmi_fast_switch_rate_limit(const struct scmi_protocol_handle *ph, 1024 u32 domain, u32 *rate_limit) 1025{ 1026 struct perf_dom_info *dom; 1027 1028 if (!rate_limit) 1029 return -EINVAL; 1030 1031 dom = scmi_perf_domain_lookup(ph, domain); 1032 if (IS_ERR(dom)) 1033 return PTR_ERR(dom); 1034 1035 if (!dom->fc_info) 1036 return -EINVAL; 1037 1038 *rate_limit = dom->fc_info[PERF_FC_LEVEL].rate_limit; 1039 return 0; 1040} 1041 1042static enum scmi_power_scale 1043scmi_power_scale_get(const struct scmi_protocol_handle *ph) 1044{ 1045 struct scmi_perf_info *pi = ph->get_priv(ph); 1046 1047 return pi->power_scale; 1048} 1049 1050static const struct scmi_perf_proto_ops perf_proto_ops = { 1051 .num_domains_get = scmi_perf_num_domains_get, 1052 .info_get = scmi_perf_info_get, 1053 .limits_set = scmi_perf_limits_set, 1054 .limits_get = scmi_perf_limits_get, 1055 .level_set = scmi_perf_level_set, 1056 .level_get = scmi_perf_level_get, 1057 .transition_latency_get = scmi_dvfs_transition_latency_get, 1058 .rate_limit_get = scmi_dvfs_rate_limit_get, 1059 .device_opps_add = scmi_dvfs_device_opps_add, 1060 .freq_set = scmi_dvfs_freq_set, 1061 .freq_get = scmi_dvfs_freq_get, 1062 .est_power_get = scmi_dvfs_est_power_get, 1063 .fast_switch_possible = scmi_fast_switch_possible, 1064 .fast_switch_rate_limit = scmi_fast_switch_rate_limit, 1065 .power_scale_get = scmi_power_scale_get, 1066}; 1067 1068static bool scmi_perf_notify_supported(const struct scmi_protocol_handle *ph, 1069 u8 evt_id, u32 src_id) 1070{ 1071 bool supported; 1072 struct perf_dom_info *dom; 1073 1074 if (evt_id >= ARRAY_SIZE(evt_2_cmd)) 1075 return false; 1076 1077 dom = scmi_perf_domain_lookup(ph, src_id); 1078 if (IS_ERR(dom)) 1079 return false; 1080 1081 if (evt_id == SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED) 1082 supported = dom->perf_limit_notify; 1083 else 1084 supported = dom->perf_level_notify; 1085 1086 return supported; 1087} 1088 1089static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph, 1090 u8 evt_id, u32 src_id, bool enable) 1091{ 1092 int ret, cmd_id; 1093 1094 if (evt_id >= ARRAY_SIZE(evt_2_cmd)) 1095 return -EINVAL; 1096 1097 cmd_id = evt_2_cmd[evt_id]; 1098 ret = scmi_perf_level_limits_notify(ph, src_id, cmd_id, enable); 1099 if (ret) 1100 pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n", 1101 evt_id, src_id, ret); 1102 1103 return ret; 1104} 1105 1106static int 1107scmi_perf_xlate_opp_to_freq(struct perf_dom_info *dom, 1108 unsigned int index, unsigned long *freq) 1109{ 1110 struct scmi_opp *opp; 1111 1112 if (!dom || !freq) 1113 return -EINVAL; 1114 1115 if (!dom->level_indexing_mode) { 1116 opp = xa_load(&dom->opps_by_lvl, index); 1117 if (!opp) 1118 return -ENODEV; 1119 1120 *freq = opp->perf * dom->mult_factor; 1121 } else { 1122 opp = xa_load(&dom->opps_by_idx, index); 1123 if (!opp) 1124 return -ENODEV; 1125 1126 *freq = opp->indicative_freq * dom->mult_factor; 1127 } 1128 1129 return 0; 1130} 1131 1132static void *scmi_perf_fill_custom_report(const struct scmi_protocol_handle *ph, 1133 u8 evt_id, ktime_t timestamp, 1134 const void *payld, size_t payld_sz, 1135 void *report, u32 *src_id) 1136{ 1137 int ret; 1138 void *rep = NULL; 1139 struct perf_dom_info *dom; 1140 1141 switch (evt_id) { 1142 case SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED: 1143 { 1144 const struct scmi_perf_limits_notify_payld *p = payld; 1145 struct scmi_perf_limits_report *r = report; 1146 unsigned long freq_min, freq_max; 1147 1148 if (sizeof(*p) != payld_sz) 1149 break; 1150 1151 r->timestamp = timestamp; 1152 r->agent_id = le32_to_cpu(p->agent_id); 1153 r->domain_id = le32_to_cpu(p->domain_id); 1154 r->range_max = le32_to_cpu(p->range_max); 1155 r->range_min = le32_to_cpu(p->range_min); 1156 /* Check if the reported domain exist at all */ 1157 dom = scmi_perf_domain_lookup(ph, r->domain_id); 1158 if (IS_ERR(dom)) 1159 break; 1160 /* 1161 * Event will be reported from this point on... 1162 * ...even if, later, xlated frequencies were not retrieved. 1163 */ 1164 *src_id = r->domain_id; 1165 rep = r; 1166 1167 ret = scmi_perf_xlate_opp_to_freq(dom, r->range_max, &freq_max); 1168 if (ret) 1169 break; 1170 1171 ret = scmi_perf_xlate_opp_to_freq(dom, r->range_min, &freq_min); 1172 if (ret) 1173 break; 1174 1175 /* Report translated freqs ONLY if both available */ 1176 r->range_max_freq = freq_max; 1177 r->range_min_freq = freq_min; 1178 1179 break; 1180 } 1181 case SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED: 1182 { 1183 const struct scmi_perf_level_notify_payld *p = payld; 1184 struct scmi_perf_level_report *r = report; 1185 unsigned long freq; 1186 1187 if (sizeof(*p) != payld_sz) 1188 break; 1189 1190 r->timestamp = timestamp; 1191 r->agent_id = le32_to_cpu(p->agent_id); 1192 r->domain_id = le32_to_cpu(p->domain_id); 1193 /* Report translated freqs ONLY if available */ 1194 r->performance_level = le32_to_cpu(p->performance_level); 1195 /* Check if the reported domain exist at all */ 1196 dom = scmi_perf_domain_lookup(ph, r->domain_id); 1197 if (IS_ERR(dom)) 1198 break; 1199 /* 1200 * Event will be reported from this point on... 1201 * ...even if, later, xlated frequencies were not retrieved. 1202 */ 1203 *src_id = r->domain_id; 1204 rep = r; 1205 1206 /* Report translated freqs ONLY if available */ 1207 ret = scmi_perf_xlate_opp_to_freq(dom, r->performance_level, 1208 &freq); 1209 if (ret) 1210 break; 1211 1212 r->performance_level_freq = freq; 1213 1214 break; 1215 } 1216 default: 1217 break; 1218 } 1219 1220 return rep; 1221} 1222 1223static int scmi_perf_get_num_sources(const struct scmi_protocol_handle *ph) 1224{ 1225 struct scmi_perf_info *pi = ph->get_priv(ph); 1226 1227 if (!pi) 1228 return -EINVAL; 1229 1230 return pi->num_domains; 1231} 1232 1233static const struct scmi_event perf_events[] = { 1234 { 1235 .id = SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED, 1236 .max_payld_sz = sizeof(struct scmi_perf_limits_notify_payld), 1237 .max_report_sz = sizeof(struct scmi_perf_limits_report), 1238 }, 1239 { 1240 .id = SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED, 1241 .max_payld_sz = sizeof(struct scmi_perf_level_notify_payld), 1242 .max_report_sz = sizeof(struct scmi_perf_level_report), 1243 }, 1244}; 1245 1246static const struct scmi_event_ops perf_event_ops = { 1247 .is_notify_supported = scmi_perf_notify_supported, 1248 .get_num_sources = scmi_perf_get_num_sources, 1249 .set_notify_enabled = scmi_perf_set_notify_enabled, 1250 .fill_custom_report = scmi_perf_fill_custom_report, 1251}; 1252 1253static const struct scmi_protocol_events perf_protocol_events = { 1254 .queue_sz = SCMI_PROTO_QUEUE_SZ, 1255 .ops = &perf_event_ops, 1256 .evts = perf_events, 1257 .num_events = ARRAY_SIZE(perf_events), 1258}; 1259 1260static int scmi_perf_protocol_init(const struct scmi_protocol_handle *ph) 1261{ 1262 int domain, ret; 1263 u32 version; 1264 struct scmi_perf_info *pinfo; 1265 1266 ret = ph->xops->version_get(ph, &version); 1267 if (ret) 1268 return ret; 1269 1270 dev_dbg(ph->dev, "Performance Version %d.%d\n", 1271 PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); 1272 1273 pinfo = devm_kzalloc(ph->dev, sizeof(*pinfo), GFP_KERNEL); 1274 if (!pinfo) 1275 return -ENOMEM; 1276 1277 pinfo->version = version; 1278 1279 ret = scmi_perf_attributes_get(ph, pinfo); 1280 if (ret) 1281 return ret; 1282 1283 pinfo->dom_info = devm_kcalloc(ph->dev, pinfo->num_domains, 1284 sizeof(*pinfo->dom_info), GFP_KERNEL); 1285 if (!pinfo->dom_info) 1286 return -ENOMEM; 1287 1288 for (domain = 0; domain < pinfo->num_domains; domain++) { 1289 struct perf_dom_info *dom = pinfo->dom_info + domain; 1290 1291 dom->id = domain; 1292 scmi_perf_domain_attributes_get(ph, dom, pinfo->notify_lim_cmd, 1293 pinfo->notify_lvl_cmd, version); 1294 scmi_perf_describe_levels_get(ph, dom, version); 1295 1296 if (dom->perf_fastchannels) 1297 scmi_perf_domain_init_fc(ph, dom); 1298 } 1299 1300 ret = devm_add_action_or_reset(ph->dev, scmi_perf_xa_destroy, pinfo); 1301 if (ret) 1302 return ret; 1303 1304 return ph->set_priv(ph, pinfo, version); 1305} 1306 1307static const struct scmi_protocol scmi_perf = { 1308 .id = SCMI_PROTOCOL_PERF, 1309 .owner = THIS_MODULE, 1310 .instance_init = &scmi_perf_protocol_init, 1311 .ops = &perf_proto_ops, 1312 .events = &perf_protocol_events, 1313 .supported_version = SCMI_PROTOCOL_SUPPORTED_VERSION, 1314}; 1315 1316DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(perf, scmi_perf) 1317