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 device *dev, struct perf_dom_info *dom, 354 struct scmi_opp *opp, 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 int ret; 366 367 opp->level_index = le32_to_cpu(r->opp[loop_idx].level_index); 368 369 ret = xa_insert(&dom->opps_by_idx, opp->level_index, opp, 370 GFP_KERNEL); 371 if (ret) 372 dev_warn(dev, 373 "Failed to add opps_by_idx at %d - ret:%d\n", 374 opp->level_index, ret); 375 376 ret = xa_insert(&dom->opps_by_lvl, opp->perf, opp, GFP_KERNEL); 377 if (ret) 378 dev_warn(dev, 379 "Failed to add opps_by_lvl at %d - ret:%d\n", 380 opp->perf, ret); 381 382 hash_add(dom->opps_by_freq, &opp->hash, opp->indicative_freq); 383 } 384 } 385 386 static int 387 iter_perf_levels_process_response(const struct scmi_protocol_handle *ph, 388 const void *response, 389 struct scmi_iterator_state *st, void *priv) 390 { 391 struct scmi_opp *opp; 392 struct scmi_perf_ipriv *p = priv; 393 394 opp = &p->perf_dom->opp[st->desc_index + st->loop_idx]; 395 if (PROTOCOL_REV_MAJOR(p->version) <= 0x3) 396 process_response_opp(opp, st->loop_idx, response); 397 else 398 process_response_opp_v4(ph->dev, p->perf_dom, opp, st->loop_idx, 399 response); 400 p->perf_dom->opp_count++; 401 402 dev_dbg(ph->dev, "Level %d Power %d Latency %dus Ifreq %d Index %d\n", 403 opp->perf, opp->power, opp->trans_latency_us, 404 opp->indicative_freq, opp->level_index); 405 406 return 0; 407 } 408 409 static int 410 scmi_perf_describe_levels_get(const struct scmi_protocol_handle *ph, 411 struct perf_dom_info *perf_dom, u32 version) 412 { 413 int ret; 414 void *iter; 415 struct scmi_iterator_ops ops = { 416 .prepare_message = iter_perf_levels_prepare_message, 417 .update_state = iter_perf_levels_update_state, 418 .process_response = iter_perf_levels_process_response, 419 }; 420 struct scmi_perf_ipriv ppriv = { 421 .version = version, 422 .perf_dom = perf_dom, 423 }; 424 425 iter = ph->hops->iter_response_init(ph, &ops, MAX_OPPS, 426 PERF_DESCRIBE_LEVELS, 427 sizeof(struct scmi_msg_perf_describe_levels), 428 &ppriv); 429 if (IS_ERR(iter)) 430 return PTR_ERR(iter); 431 432 ret = ph->hops->iter_response_run(iter); 433 if (ret) 434 return ret; 435 436 if (perf_dom->opp_count) 437 sort(perf_dom->opp, perf_dom->opp_count, 438 sizeof(struct scmi_opp), opp_cmp_func, NULL); 439 440 return ret; 441 } 442 443 static int scmi_perf_num_domains_get(const struct scmi_protocol_handle *ph) 444 { 445 struct scmi_perf_info *pi = ph->get_priv(ph); 446 447 return pi->num_domains; 448 } 449 450 static inline struct perf_dom_info * 451 scmi_perf_domain_lookup(const struct scmi_protocol_handle *ph, u32 domain) 452 { 453 struct scmi_perf_info *pi = ph->get_priv(ph); 454 455 if (domain >= pi->num_domains) 456 return ERR_PTR(-EINVAL); 457 458 return pi->dom_info + domain; 459 } 460 461 static const struct scmi_perf_domain_info * 462 scmi_perf_info_get(const struct scmi_protocol_handle *ph, u32 domain) 463 { 464 struct perf_dom_info *dom; 465 466 dom = scmi_perf_domain_lookup(ph, domain); 467 if (IS_ERR(dom)) 468 return ERR_PTR(-EINVAL); 469 470 return &dom->info; 471 } 472 473 static int scmi_perf_msg_limits_set(const struct scmi_protocol_handle *ph, 474 u32 domain, u32 max_perf, u32 min_perf) 475 { 476 int ret; 477 struct scmi_xfer *t; 478 struct scmi_perf_set_limits *limits; 479 480 ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_SET, 481 sizeof(*limits), 0, &t); 482 if (ret) 483 return ret; 484 485 limits = t->tx.buf; 486 limits->domain = cpu_to_le32(domain); 487 limits->max_level = cpu_to_le32(max_perf); 488 limits->min_level = cpu_to_le32(min_perf); 489 490 ret = ph->xops->do_xfer(ph, t); 491 492 ph->xops->xfer_put(ph, t); 493 return ret; 494 } 495 496 static int __scmi_perf_limits_set(const struct scmi_protocol_handle *ph, 497 struct perf_dom_info *dom, u32 max_perf, 498 u32 min_perf) 499 { 500 if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].set_addr) { 501 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT]; 502 503 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_SET, 504 dom->id, min_perf, max_perf); 505 iowrite32(max_perf, fci->set_addr); 506 iowrite32(min_perf, fci->set_addr + 4); 507 ph->hops->fastchannel_db_ring(fci->set_db); 508 return 0; 509 } 510 511 return scmi_perf_msg_limits_set(ph, dom->id, max_perf, min_perf); 512 } 513 514 static int scmi_perf_limits_set(const struct scmi_protocol_handle *ph, 515 u32 domain, u32 max_perf, u32 min_perf) 516 { 517 struct scmi_perf_info *pi = ph->get_priv(ph); 518 struct perf_dom_info *dom; 519 520 dom = scmi_perf_domain_lookup(ph, domain); 521 if (IS_ERR(dom)) 522 return PTR_ERR(dom); 523 524 if (!dom->set_limits) 525 return -EOPNOTSUPP; 526 527 if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3 && !max_perf && !min_perf) 528 return -EINVAL; 529 530 if (dom->level_indexing_mode) { 531 struct scmi_opp *opp; 532 533 if (min_perf) { 534 opp = xa_load(&dom->opps_by_lvl, min_perf); 535 if (!opp) 536 return -EIO; 537 538 min_perf = opp->level_index; 539 } 540 541 if (max_perf) { 542 opp = xa_load(&dom->opps_by_lvl, max_perf); 543 if (!opp) 544 return -EIO; 545 546 max_perf = opp->level_index; 547 } 548 } 549 550 return __scmi_perf_limits_set(ph, dom, max_perf, min_perf); 551 } 552 553 static int scmi_perf_msg_limits_get(const struct scmi_protocol_handle *ph, 554 u32 domain, u32 *max_perf, u32 *min_perf) 555 { 556 int ret; 557 struct scmi_xfer *t; 558 struct scmi_perf_get_limits *limits; 559 560 ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_GET, 561 sizeof(__le32), 0, &t); 562 if (ret) 563 return ret; 564 565 put_unaligned_le32(domain, t->tx.buf); 566 567 ret = ph->xops->do_xfer(ph, t); 568 if (!ret) { 569 limits = t->rx.buf; 570 571 *max_perf = le32_to_cpu(limits->max_level); 572 *min_perf = le32_to_cpu(limits->min_level); 573 } 574 575 ph->xops->xfer_put(ph, t); 576 return ret; 577 } 578 579 static int __scmi_perf_limits_get(const struct scmi_protocol_handle *ph, 580 struct perf_dom_info *dom, u32 *max_perf, 581 u32 *min_perf) 582 { 583 if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].get_addr) { 584 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT]; 585 586 *max_perf = ioread32(fci->get_addr); 587 *min_perf = ioread32(fci->get_addr + 4); 588 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_GET, 589 dom->id, *min_perf, *max_perf); 590 return 0; 591 } 592 593 return scmi_perf_msg_limits_get(ph, dom->id, max_perf, min_perf); 594 } 595 596 static int scmi_perf_limits_get(const struct scmi_protocol_handle *ph, 597 u32 domain, u32 *max_perf, u32 *min_perf) 598 { 599 int ret; 600 struct perf_dom_info *dom; 601 602 dom = scmi_perf_domain_lookup(ph, domain); 603 if (IS_ERR(dom)) 604 return PTR_ERR(dom); 605 606 ret = __scmi_perf_limits_get(ph, dom, max_perf, min_perf); 607 if (ret) 608 return ret; 609 610 if (dom->level_indexing_mode) { 611 struct scmi_opp *opp; 612 613 opp = xa_load(&dom->opps_by_idx, *min_perf); 614 if (!opp) 615 return -EIO; 616 617 *min_perf = opp->perf; 618 619 opp = xa_load(&dom->opps_by_idx, *max_perf); 620 if (!opp) 621 return -EIO; 622 623 *max_perf = opp->perf; 624 } 625 626 return 0; 627 } 628 629 static int scmi_perf_msg_level_set(const struct scmi_protocol_handle *ph, 630 u32 domain, u32 level, bool poll) 631 { 632 int ret; 633 struct scmi_xfer *t; 634 struct scmi_perf_set_level *lvl; 635 636 ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_SET, sizeof(*lvl), 0, &t); 637 if (ret) 638 return ret; 639 640 t->hdr.poll_completion = poll; 641 lvl = t->tx.buf; 642 lvl->domain = cpu_to_le32(domain); 643 lvl->level = cpu_to_le32(level); 644 645 ret = ph->xops->do_xfer(ph, t); 646 647 ph->xops->xfer_put(ph, t); 648 return ret; 649 } 650 651 static int __scmi_perf_level_set(const struct scmi_protocol_handle *ph, 652 struct perf_dom_info *dom, u32 level, 653 bool poll) 654 { 655 if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr) { 656 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LEVEL]; 657 658 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_SET, 659 dom->id, level, 0); 660 iowrite32(level, fci->set_addr); 661 ph->hops->fastchannel_db_ring(fci->set_db); 662 return 0; 663 } 664 665 return scmi_perf_msg_level_set(ph, dom->id, level, poll); 666 } 667 668 static int scmi_perf_level_set(const struct scmi_protocol_handle *ph, 669 u32 domain, u32 level, bool poll) 670 { 671 struct perf_dom_info *dom; 672 673 dom = scmi_perf_domain_lookup(ph, domain); 674 if (IS_ERR(dom)) 675 return PTR_ERR(dom); 676 677 if (!dom->info.set_perf) 678 return -EOPNOTSUPP; 679 680 if (dom->level_indexing_mode) { 681 struct scmi_opp *opp; 682 683 opp = xa_load(&dom->opps_by_lvl, level); 684 if (!opp) 685 return -EIO; 686 687 level = opp->level_index; 688 } 689 690 return __scmi_perf_level_set(ph, dom, level, poll); 691 } 692 693 static int scmi_perf_msg_level_get(const struct scmi_protocol_handle *ph, 694 u32 domain, u32 *level, bool poll) 695 { 696 int ret; 697 struct scmi_xfer *t; 698 699 ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_GET, 700 sizeof(u32), sizeof(u32), &t); 701 if (ret) 702 return ret; 703 704 t->hdr.poll_completion = poll; 705 put_unaligned_le32(domain, t->tx.buf); 706 707 ret = ph->xops->do_xfer(ph, t); 708 if (!ret) 709 *level = get_unaligned_le32(t->rx.buf); 710 711 ph->xops->xfer_put(ph, t); 712 return ret; 713 } 714 715 static int __scmi_perf_level_get(const struct scmi_protocol_handle *ph, 716 struct perf_dom_info *dom, u32 *level, 717 bool poll) 718 { 719 if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].get_addr) { 720 *level = ioread32(dom->fc_info[PERF_FC_LEVEL].get_addr); 721 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_GET, 722 dom->id, *level, 0); 723 return 0; 724 } 725 726 return scmi_perf_msg_level_get(ph, dom->id, level, poll); 727 } 728 729 static int scmi_perf_level_get(const struct scmi_protocol_handle *ph, 730 u32 domain, u32 *level, bool poll) 731 { 732 int ret; 733 struct perf_dom_info *dom; 734 735 dom = scmi_perf_domain_lookup(ph, domain); 736 if (IS_ERR(dom)) 737 return PTR_ERR(dom); 738 739 ret = __scmi_perf_level_get(ph, dom, level, poll); 740 if (ret) 741 return ret; 742 743 if (dom->level_indexing_mode) { 744 struct scmi_opp *opp; 745 746 opp = xa_load(&dom->opps_by_idx, *level); 747 if (!opp) 748 return -EIO; 749 750 *level = opp->perf; 751 } 752 753 return 0; 754 } 755 756 static int scmi_perf_level_limits_notify(const struct scmi_protocol_handle *ph, 757 u32 domain, int message_id, 758 bool enable) 759 { 760 int ret; 761 struct scmi_xfer *t; 762 struct scmi_perf_notify_level_or_limits *notify; 763 764 ret = ph->xops->xfer_get_init(ph, message_id, sizeof(*notify), 0, &t); 765 if (ret) 766 return ret; 767 768 notify = t->tx.buf; 769 notify->domain = cpu_to_le32(domain); 770 notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0; 771 772 ret = ph->xops->do_xfer(ph, t); 773 774 ph->xops->xfer_put(ph, t); 775 return ret; 776 } 777 778 static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph, 779 struct perf_dom_info *dom) 780 { 781 struct scmi_fc_info *fc; 782 783 fc = devm_kcalloc(ph->dev, PERF_FC_MAX, sizeof(*fc), GFP_KERNEL); 784 if (!fc) 785 return; 786 787 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 788 PERF_LEVEL_GET, 4, dom->id, 789 &fc[PERF_FC_LEVEL].get_addr, NULL); 790 791 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 792 PERF_LIMITS_GET, 8, dom->id, 793 &fc[PERF_FC_LIMIT].get_addr, NULL); 794 795 if (dom->info.set_perf) 796 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 797 PERF_LEVEL_SET, 4, dom->id, 798 &fc[PERF_FC_LEVEL].set_addr, 799 &fc[PERF_FC_LEVEL].set_db); 800 801 if (dom->set_limits) 802 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 803 PERF_LIMITS_SET, 8, dom->id, 804 &fc[PERF_FC_LIMIT].set_addr, 805 &fc[PERF_FC_LIMIT].set_db); 806 807 dom->fc_info = fc; 808 } 809 810 static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph, 811 struct device *dev, u32 domain) 812 { 813 int idx, ret; 814 unsigned long freq; 815 struct dev_pm_opp_data data = {}; 816 struct perf_dom_info *dom; 817 818 dom = scmi_perf_domain_lookup(ph, domain); 819 if (IS_ERR(dom)) 820 return PTR_ERR(dom); 821 822 for (idx = 0; idx < dom->opp_count; idx++) { 823 if (!dom->level_indexing_mode) 824 freq = dom->opp[idx].perf * dom->mult_factor; 825 else 826 freq = dom->opp[idx].indicative_freq * dom->mult_factor; 827 828 data.level = dom->opp[idx].perf; 829 data.freq = freq; 830 831 ret = dev_pm_opp_add_dynamic(dev, &data); 832 if (ret) { 833 dev_warn(dev, "failed to add opp %luHz\n", freq); 834 dev_pm_opp_remove_all_dynamic(dev); 835 return ret; 836 } 837 838 dev_dbg(dev, "[%d][%s]:: Registered OPP[%d] %lu\n", 839 domain, dom->info.name, idx, freq); 840 } 841 return 0; 842 } 843 844 static int 845 scmi_dvfs_transition_latency_get(const struct scmi_protocol_handle *ph, 846 u32 domain) 847 { 848 struct perf_dom_info *dom; 849 850 dom = scmi_perf_domain_lookup(ph, domain); 851 if (IS_ERR(dom)) 852 return PTR_ERR(dom); 853 854 /* uS to nS */ 855 return dom->opp[dom->opp_count - 1].trans_latency_us * 1000; 856 } 857 858 static int scmi_dvfs_freq_set(const struct scmi_protocol_handle *ph, u32 domain, 859 unsigned long freq, bool poll) 860 { 861 unsigned int level; 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 if (!dom->level_indexing_mode) { 869 level = freq / dom->mult_factor; 870 } else { 871 struct scmi_opp *opp; 872 873 opp = LOOKUP_BY_FREQ(dom->opps_by_freq, 874 freq / dom->mult_factor); 875 if (!opp) 876 return -EIO; 877 878 level = opp->level_index; 879 } 880 881 return __scmi_perf_level_set(ph, dom, level, poll); 882 } 883 884 static int scmi_dvfs_freq_get(const struct scmi_protocol_handle *ph, u32 domain, 885 unsigned long *freq, bool poll) 886 { 887 int ret; 888 u32 level; 889 struct perf_dom_info *dom; 890 891 dom = scmi_perf_domain_lookup(ph, domain); 892 if (IS_ERR(dom)) 893 return PTR_ERR(dom); 894 895 ret = __scmi_perf_level_get(ph, dom, &level, poll); 896 if (ret) 897 return ret; 898 899 if (!dom->level_indexing_mode) { 900 *freq = level * dom->mult_factor; 901 } else { 902 struct scmi_opp *opp; 903 904 opp = xa_load(&dom->opps_by_idx, level); 905 if (!opp) 906 return -EIO; 907 908 *freq = opp->indicative_freq * dom->mult_factor; 909 } 910 911 return ret; 912 } 913 914 static int scmi_dvfs_est_power_get(const struct scmi_protocol_handle *ph, 915 u32 domain, unsigned long *freq, 916 unsigned long *power) 917 { 918 struct perf_dom_info *dom; 919 unsigned long opp_freq; 920 int idx, ret = -EINVAL; 921 struct scmi_opp *opp; 922 923 dom = scmi_perf_domain_lookup(ph, domain); 924 if (IS_ERR(dom)) 925 return PTR_ERR(dom); 926 927 for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) { 928 if (!dom->level_indexing_mode) 929 opp_freq = opp->perf * dom->mult_factor; 930 else 931 opp_freq = opp->indicative_freq * dom->mult_factor; 932 933 if (opp_freq < *freq) 934 continue; 935 936 *freq = opp_freq; 937 *power = opp->power; 938 ret = 0; 939 break; 940 } 941 942 return ret; 943 } 944 945 static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph, 946 u32 domain) 947 { 948 struct perf_dom_info *dom; 949 950 dom = scmi_perf_domain_lookup(ph, domain); 951 if (IS_ERR(dom)) 952 return false; 953 954 return dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr; 955 } 956 957 static enum scmi_power_scale 958 scmi_power_scale_get(const struct scmi_protocol_handle *ph) 959 { 960 struct scmi_perf_info *pi = ph->get_priv(ph); 961 962 return pi->power_scale; 963 } 964 965 static const struct scmi_perf_proto_ops perf_proto_ops = { 966 .num_domains_get = scmi_perf_num_domains_get, 967 .info_get = scmi_perf_info_get, 968 .limits_set = scmi_perf_limits_set, 969 .limits_get = scmi_perf_limits_get, 970 .level_set = scmi_perf_level_set, 971 .level_get = scmi_perf_level_get, 972 .transition_latency_get = scmi_dvfs_transition_latency_get, 973 .device_opps_add = scmi_dvfs_device_opps_add, 974 .freq_set = scmi_dvfs_freq_set, 975 .freq_get = scmi_dvfs_freq_get, 976 .est_power_get = scmi_dvfs_est_power_get, 977 .fast_switch_possible = scmi_fast_switch_possible, 978 .power_scale_get = scmi_power_scale_get, 979 }; 980 981 static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph, 982 u8 evt_id, u32 src_id, bool enable) 983 { 984 int ret, cmd_id; 985 986 if (evt_id >= ARRAY_SIZE(evt_2_cmd)) 987 return -EINVAL; 988 989 cmd_id = evt_2_cmd[evt_id]; 990 ret = scmi_perf_level_limits_notify(ph, src_id, cmd_id, enable); 991 if (ret) 992 pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n", 993 evt_id, src_id, ret); 994 995 return ret; 996 } 997 998 static void *scmi_perf_fill_custom_report(const struct scmi_protocol_handle *ph, 999 u8 evt_id, ktime_t timestamp, 1000 const void *payld, size_t payld_sz, 1001 void *report, u32 *src_id) 1002 { 1003 void *rep = NULL; 1004 1005 switch (evt_id) { 1006 case SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED: 1007 { 1008 const struct scmi_perf_limits_notify_payld *p = payld; 1009 struct scmi_perf_limits_report *r = report; 1010 1011 if (sizeof(*p) != payld_sz) 1012 break; 1013 1014 r->timestamp = timestamp; 1015 r->agent_id = le32_to_cpu(p->agent_id); 1016 r->domain_id = le32_to_cpu(p->domain_id); 1017 r->range_max = le32_to_cpu(p->range_max); 1018 r->range_min = le32_to_cpu(p->range_min); 1019 *src_id = r->domain_id; 1020 rep = r; 1021 break; 1022 } 1023 case SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED: 1024 { 1025 const struct scmi_perf_level_notify_payld *p = payld; 1026 struct scmi_perf_level_report *r = report; 1027 1028 if (sizeof(*p) != payld_sz) 1029 break; 1030 1031 r->timestamp = timestamp; 1032 r->agent_id = le32_to_cpu(p->agent_id); 1033 r->domain_id = le32_to_cpu(p->domain_id); 1034 r->performance_level = le32_to_cpu(p->performance_level); 1035 *src_id = r->domain_id; 1036 rep = r; 1037 break; 1038 } 1039 default: 1040 break; 1041 } 1042 1043 return rep; 1044 } 1045 1046 static int scmi_perf_get_num_sources(const struct scmi_protocol_handle *ph) 1047 { 1048 struct scmi_perf_info *pi = ph->get_priv(ph); 1049 1050 if (!pi) 1051 return -EINVAL; 1052 1053 return pi->num_domains; 1054 } 1055 1056 static const struct scmi_event perf_events[] = { 1057 { 1058 .id = SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED, 1059 .max_payld_sz = sizeof(struct scmi_perf_limits_notify_payld), 1060 .max_report_sz = sizeof(struct scmi_perf_limits_report), 1061 }, 1062 { 1063 .id = SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED, 1064 .max_payld_sz = sizeof(struct scmi_perf_level_notify_payld), 1065 .max_report_sz = sizeof(struct scmi_perf_level_report), 1066 }, 1067 }; 1068 1069 static const struct scmi_event_ops perf_event_ops = { 1070 .get_num_sources = scmi_perf_get_num_sources, 1071 .set_notify_enabled = scmi_perf_set_notify_enabled, 1072 .fill_custom_report = scmi_perf_fill_custom_report, 1073 }; 1074 1075 static const struct scmi_protocol_events perf_protocol_events = { 1076 .queue_sz = SCMI_PROTO_QUEUE_SZ, 1077 .ops = &perf_event_ops, 1078 .evts = perf_events, 1079 .num_events = ARRAY_SIZE(perf_events), 1080 }; 1081 1082 static int scmi_perf_protocol_init(const struct scmi_protocol_handle *ph) 1083 { 1084 int domain, ret; 1085 u32 version; 1086 struct scmi_perf_info *pinfo; 1087 1088 ret = ph->xops->version_get(ph, &version); 1089 if (ret) 1090 return ret; 1091 1092 dev_dbg(ph->dev, "Performance Version %d.%d\n", 1093 PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); 1094 1095 pinfo = devm_kzalloc(ph->dev, sizeof(*pinfo), GFP_KERNEL); 1096 if (!pinfo) 1097 return -ENOMEM; 1098 1099 pinfo->version = version; 1100 1101 ret = scmi_perf_attributes_get(ph, pinfo); 1102 if (ret) 1103 return ret; 1104 1105 pinfo->dom_info = devm_kcalloc(ph->dev, pinfo->num_domains, 1106 sizeof(*pinfo->dom_info), GFP_KERNEL); 1107 if (!pinfo->dom_info) 1108 return -ENOMEM; 1109 1110 for (domain = 0; domain < pinfo->num_domains; domain++) { 1111 struct perf_dom_info *dom = pinfo->dom_info + domain; 1112 1113 dom->id = domain; 1114 scmi_perf_domain_attributes_get(ph, dom, version); 1115 scmi_perf_describe_levels_get(ph, dom, version); 1116 1117 if (dom->perf_fastchannels) 1118 scmi_perf_domain_init_fc(ph, dom); 1119 } 1120 1121 ret = devm_add_action_or_reset(ph->dev, scmi_perf_xa_destroy, pinfo); 1122 if (ret) 1123 return ret; 1124 1125 return ph->set_priv(ph, pinfo, version); 1126 } 1127 1128 static const struct scmi_protocol scmi_perf = { 1129 .id = SCMI_PROTOCOL_PERF, 1130 .owner = THIS_MODULE, 1131 .instance_init = &scmi_perf_protocol_init, 1132 .ops = &perf_proto_ops, 1133 .events = &perf_protocol_events, 1134 .supported_version = SCMI_PROTOCOL_SUPPORTED_VERSION, 1135 }; 1136 1137 DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(perf, scmi_perf) 1138