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