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