1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * System Control and Management Interface (SCMI) Performance Protocol 4 * 5 * Copyright (C) 2018-2022 ARM Ltd. 6 */ 7 8 #define pr_fmt(fmt) "SCMI Notifications PERF - " fmt 9 10 #include <linux/bits.h> 11 #include <linux/of.h> 12 #include <linux/io.h> 13 #include <linux/module.h> 14 #include <linux/platform_device.h> 15 #include <linux/pm_opp.h> 16 #include <linux/scmi_protocol.h> 17 #include <linux/sort.h> 18 19 #include <trace/events/scmi.h> 20 21 #include "protocols.h" 22 #include "notify.h" 23 24 #define MAX_OPPS 16 25 26 enum scmi_performance_protocol_cmd { 27 PERF_DOMAIN_ATTRIBUTES = 0x3, 28 PERF_DESCRIBE_LEVELS = 0x4, 29 PERF_LIMITS_SET = 0x5, 30 PERF_LIMITS_GET = 0x6, 31 PERF_LEVEL_SET = 0x7, 32 PERF_LEVEL_GET = 0x8, 33 PERF_NOTIFY_LIMITS = 0x9, 34 PERF_NOTIFY_LEVEL = 0xa, 35 PERF_DESCRIBE_FASTCHANNEL = 0xb, 36 PERF_DOMAIN_NAME_GET = 0xc, 37 }; 38 39 enum { 40 PERF_FC_LEVEL, 41 PERF_FC_LIMIT, 42 PERF_FC_MAX, 43 }; 44 45 struct scmi_opp { 46 u32 perf; 47 u32 power; 48 u32 trans_latency_us; 49 }; 50 51 struct scmi_msg_resp_perf_attributes { 52 __le16 num_domains; 53 __le16 flags; 54 #define POWER_SCALE_IN_MILLIWATT(x) ((x) & BIT(0)) 55 #define POWER_SCALE_IN_MICROWATT(x) ((x) & BIT(1)) 56 __le32 stats_addr_low; 57 __le32 stats_addr_high; 58 __le32 stats_size; 59 }; 60 61 struct scmi_msg_resp_perf_domain_attributes { 62 __le32 flags; 63 #define SUPPORTS_SET_LIMITS(x) ((x) & BIT(31)) 64 #define SUPPORTS_SET_PERF_LVL(x) ((x) & BIT(30)) 65 #define SUPPORTS_PERF_LIMIT_NOTIFY(x) ((x) & BIT(29)) 66 #define SUPPORTS_PERF_LEVEL_NOTIFY(x) ((x) & BIT(28)) 67 #define SUPPORTS_PERF_FASTCHANNELS(x) ((x) & BIT(27)) 68 #define SUPPORTS_EXTENDED_NAMES(x) ((x) & BIT(26)) 69 __le32 rate_limit_us; 70 __le32 sustained_freq_khz; 71 __le32 sustained_perf_level; 72 u8 name[SCMI_SHORT_NAME_MAX_SIZE]; 73 }; 74 75 struct scmi_msg_perf_describe_levels { 76 __le32 domain; 77 __le32 level_index; 78 }; 79 80 struct scmi_perf_set_limits { 81 __le32 domain; 82 __le32 max_level; 83 __le32 min_level; 84 }; 85 86 struct scmi_perf_get_limits { 87 __le32 max_level; 88 __le32 min_level; 89 }; 90 91 struct scmi_perf_set_level { 92 __le32 domain; 93 __le32 level; 94 }; 95 96 struct scmi_perf_notify_level_or_limits { 97 __le32 domain; 98 __le32 notify_enable; 99 }; 100 101 struct scmi_perf_limits_notify_payld { 102 __le32 agent_id; 103 __le32 domain_id; 104 __le32 range_max; 105 __le32 range_min; 106 }; 107 108 struct scmi_perf_level_notify_payld { 109 __le32 agent_id; 110 __le32 domain_id; 111 __le32 performance_level; 112 }; 113 114 struct scmi_msg_resp_perf_describe_levels { 115 __le16 num_returned; 116 __le16 num_remaining; 117 struct { 118 __le32 perf_val; 119 __le32 power; 120 __le16 transition_latency_us; 121 __le16 reserved; 122 } opp[]; 123 }; 124 125 struct perf_dom_info { 126 bool set_limits; 127 bool set_perf; 128 bool perf_limit_notify; 129 bool perf_level_notify; 130 bool perf_fastchannels; 131 u32 opp_count; 132 u32 sustained_freq_khz; 133 u32 sustained_perf_level; 134 u32 mult_factor; 135 char name[SCMI_MAX_STR_SIZE]; 136 struct scmi_opp opp[MAX_OPPS]; 137 struct scmi_fc_info *fc_info; 138 }; 139 140 struct scmi_perf_info { 141 u32 version; 142 int num_domains; 143 enum scmi_power_scale power_scale; 144 u64 stats_addr; 145 u32 stats_size; 146 struct perf_dom_info *dom_info; 147 }; 148 149 static enum scmi_performance_protocol_cmd evt_2_cmd[] = { 150 PERF_NOTIFY_LIMITS, 151 PERF_NOTIFY_LEVEL, 152 }; 153 154 static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph, 155 struct scmi_perf_info *pi) 156 { 157 int ret; 158 struct scmi_xfer *t; 159 struct scmi_msg_resp_perf_attributes *attr; 160 161 ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0, 162 sizeof(*attr), &t); 163 if (ret) 164 return ret; 165 166 attr = t->rx.buf; 167 168 ret = ph->xops->do_xfer(ph, t); 169 if (!ret) { 170 u16 flags = le16_to_cpu(attr->flags); 171 172 pi->num_domains = le16_to_cpu(attr->num_domains); 173 174 if (POWER_SCALE_IN_MILLIWATT(flags)) 175 pi->power_scale = SCMI_POWER_MILLIWATTS; 176 if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3) 177 if (POWER_SCALE_IN_MICROWATT(flags)) 178 pi->power_scale = SCMI_POWER_MICROWATTS; 179 180 pi->stats_addr = le32_to_cpu(attr->stats_addr_low) | 181 (u64)le32_to_cpu(attr->stats_addr_high) << 32; 182 pi->stats_size = le32_to_cpu(attr->stats_size); 183 } 184 185 ph->xops->xfer_put(ph, t); 186 return ret; 187 } 188 189 static int 190 scmi_perf_domain_attributes_get(const struct scmi_protocol_handle *ph, 191 u32 domain, struct perf_dom_info *dom_info, 192 u32 version) 193 { 194 int ret; 195 u32 flags; 196 struct scmi_xfer *t; 197 struct scmi_msg_resp_perf_domain_attributes *attr; 198 199 ret = ph->xops->xfer_get_init(ph, PERF_DOMAIN_ATTRIBUTES, 200 sizeof(domain), sizeof(*attr), &t); 201 if (ret) 202 return ret; 203 204 put_unaligned_le32(domain, t->tx.buf); 205 attr = t->rx.buf; 206 207 ret = ph->xops->do_xfer(ph, t); 208 if (!ret) { 209 flags = le32_to_cpu(attr->flags); 210 211 dom_info->set_limits = SUPPORTS_SET_LIMITS(flags); 212 dom_info->set_perf = SUPPORTS_SET_PERF_LVL(flags); 213 dom_info->perf_limit_notify = SUPPORTS_PERF_LIMIT_NOTIFY(flags); 214 dom_info->perf_level_notify = SUPPORTS_PERF_LEVEL_NOTIFY(flags); 215 dom_info->perf_fastchannels = SUPPORTS_PERF_FASTCHANNELS(flags); 216 dom_info->sustained_freq_khz = 217 le32_to_cpu(attr->sustained_freq_khz); 218 dom_info->sustained_perf_level = 219 le32_to_cpu(attr->sustained_perf_level); 220 if (!dom_info->sustained_freq_khz || 221 !dom_info->sustained_perf_level) 222 /* CPUFreq converts to kHz, hence default 1000 */ 223 dom_info->mult_factor = 1000; 224 else 225 dom_info->mult_factor = 226 (dom_info->sustained_freq_khz * 1000) / 227 dom_info->sustained_perf_level; 228 strscpy(dom_info->name, attr->name, SCMI_SHORT_NAME_MAX_SIZE); 229 } 230 231 ph->xops->xfer_put(ph, t); 232 233 /* 234 * If supported overwrite short name with the extended one; 235 * on error just carry on and use already provided short name. 236 */ 237 if (!ret && PROTOCOL_REV_MAJOR(version) >= 0x3 && 238 SUPPORTS_EXTENDED_NAMES(flags)) 239 ph->hops->extended_name_get(ph, PERF_DOMAIN_NAME_GET, domain, 240 dom_info->name, SCMI_MAX_STR_SIZE); 241 242 return ret; 243 } 244 245 static int opp_cmp_func(const void *opp1, const void *opp2) 246 { 247 const struct scmi_opp *t1 = opp1, *t2 = opp2; 248 249 return t1->perf - t2->perf; 250 } 251 252 struct scmi_perf_ipriv { 253 u32 domain; 254 struct perf_dom_info *perf_dom; 255 }; 256 257 static void iter_perf_levels_prepare_message(void *message, 258 unsigned int desc_index, 259 const void *priv) 260 { 261 struct scmi_msg_perf_describe_levels *msg = message; 262 const struct scmi_perf_ipriv *p = priv; 263 264 msg->domain = cpu_to_le32(p->domain); 265 /* Set the number of OPPs to be skipped/already read */ 266 msg->level_index = cpu_to_le32(desc_index); 267 } 268 269 static int iter_perf_levels_update_state(struct scmi_iterator_state *st, 270 const void *response, void *priv) 271 { 272 const struct scmi_msg_resp_perf_describe_levels *r = response; 273 274 st->num_returned = le16_to_cpu(r->num_returned); 275 st->num_remaining = le16_to_cpu(r->num_remaining); 276 277 return 0; 278 } 279 280 static int 281 iter_perf_levels_process_response(const struct scmi_protocol_handle *ph, 282 const void *response, 283 struct scmi_iterator_state *st, void *priv) 284 { 285 struct scmi_opp *opp; 286 const struct scmi_msg_resp_perf_describe_levels *r = response; 287 struct scmi_perf_ipriv *p = priv; 288 289 opp = &p->perf_dom->opp[st->desc_index + st->loop_idx]; 290 opp->perf = le32_to_cpu(r->opp[st->loop_idx].perf_val); 291 opp->power = le32_to_cpu(r->opp[st->loop_idx].power); 292 opp->trans_latency_us = 293 le16_to_cpu(r->opp[st->loop_idx].transition_latency_us); 294 p->perf_dom->opp_count++; 295 296 dev_dbg(ph->dev, "Level %d Power %d Latency %dus\n", 297 opp->perf, opp->power, opp->trans_latency_us); 298 299 return 0; 300 } 301 302 static int 303 scmi_perf_describe_levels_get(const struct scmi_protocol_handle *ph, u32 domain, 304 struct perf_dom_info *perf_dom) 305 { 306 int ret; 307 void *iter; 308 struct scmi_iterator_ops ops = { 309 .prepare_message = iter_perf_levels_prepare_message, 310 .update_state = iter_perf_levels_update_state, 311 .process_response = iter_perf_levels_process_response, 312 }; 313 struct scmi_perf_ipriv ppriv = { 314 .domain = domain, 315 .perf_dom = perf_dom, 316 }; 317 318 iter = ph->hops->iter_response_init(ph, &ops, MAX_OPPS, 319 PERF_DESCRIBE_LEVELS, 320 sizeof(struct scmi_msg_perf_describe_levels), 321 &ppriv); 322 if (IS_ERR(iter)) 323 return PTR_ERR(iter); 324 325 ret = ph->hops->iter_response_run(iter); 326 if (ret) 327 return ret; 328 329 if (perf_dom->opp_count) 330 sort(perf_dom->opp, perf_dom->opp_count, 331 sizeof(struct scmi_opp), opp_cmp_func, NULL); 332 333 return ret; 334 } 335 336 static int scmi_perf_mb_limits_set(const struct scmi_protocol_handle *ph, 337 u32 domain, u32 max_perf, u32 min_perf) 338 { 339 int ret; 340 struct scmi_xfer *t; 341 struct scmi_perf_set_limits *limits; 342 343 ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_SET, 344 sizeof(*limits), 0, &t); 345 if (ret) 346 return ret; 347 348 limits = t->tx.buf; 349 limits->domain = cpu_to_le32(domain); 350 limits->max_level = cpu_to_le32(max_perf); 351 limits->min_level = cpu_to_le32(min_perf); 352 353 ret = ph->xops->do_xfer(ph, t); 354 355 ph->xops->xfer_put(ph, t); 356 return ret; 357 } 358 359 static int scmi_perf_limits_set(const struct scmi_protocol_handle *ph, 360 u32 domain, u32 max_perf, u32 min_perf) 361 { 362 struct scmi_perf_info *pi = ph->get_priv(ph); 363 struct perf_dom_info *dom = pi->dom_info + domain; 364 365 if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3 && !max_perf && !min_perf) 366 return -EINVAL; 367 368 if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].set_addr) { 369 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT]; 370 371 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_SET, 372 domain, min_perf, max_perf); 373 iowrite32(max_perf, fci->set_addr); 374 iowrite32(min_perf, fci->set_addr + 4); 375 ph->hops->fastchannel_db_ring(fci->set_db); 376 return 0; 377 } 378 379 return scmi_perf_mb_limits_set(ph, domain, max_perf, min_perf); 380 } 381 382 static int scmi_perf_mb_limits_get(const struct scmi_protocol_handle *ph, 383 u32 domain, u32 *max_perf, u32 *min_perf) 384 { 385 int ret; 386 struct scmi_xfer *t; 387 struct scmi_perf_get_limits *limits; 388 389 ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_GET, 390 sizeof(__le32), 0, &t); 391 if (ret) 392 return ret; 393 394 put_unaligned_le32(domain, t->tx.buf); 395 396 ret = ph->xops->do_xfer(ph, t); 397 if (!ret) { 398 limits = t->rx.buf; 399 400 *max_perf = le32_to_cpu(limits->max_level); 401 *min_perf = le32_to_cpu(limits->min_level); 402 } 403 404 ph->xops->xfer_put(ph, t); 405 return ret; 406 } 407 408 static int scmi_perf_limits_get(const struct scmi_protocol_handle *ph, 409 u32 domain, u32 *max_perf, u32 *min_perf) 410 { 411 struct scmi_perf_info *pi = ph->get_priv(ph); 412 struct perf_dom_info *dom = pi->dom_info + domain; 413 414 if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].get_addr) { 415 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT]; 416 417 *max_perf = ioread32(fci->get_addr); 418 *min_perf = ioread32(fci->get_addr + 4); 419 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_GET, 420 domain, *min_perf, *max_perf); 421 return 0; 422 } 423 424 return scmi_perf_mb_limits_get(ph, domain, max_perf, min_perf); 425 } 426 427 static int scmi_perf_mb_level_set(const struct scmi_protocol_handle *ph, 428 u32 domain, u32 level, bool poll) 429 { 430 int ret; 431 struct scmi_xfer *t; 432 struct scmi_perf_set_level *lvl; 433 434 ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_SET, sizeof(*lvl), 0, &t); 435 if (ret) 436 return ret; 437 438 t->hdr.poll_completion = poll; 439 lvl = t->tx.buf; 440 lvl->domain = cpu_to_le32(domain); 441 lvl->level = cpu_to_le32(level); 442 443 ret = ph->xops->do_xfer(ph, t); 444 445 ph->xops->xfer_put(ph, t); 446 return ret; 447 } 448 449 static int scmi_perf_level_set(const struct scmi_protocol_handle *ph, 450 u32 domain, u32 level, bool poll) 451 { 452 struct scmi_perf_info *pi = ph->get_priv(ph); 453 struct perf_dom_info *dom = pi->dom_info + domain; 454 455 if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr) { 456 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LEVEL]; 457 458 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_SET, 459 domain, level, 0); 460 iowrite32(level, fci->set_addr); 461 ph->hops->fastchannel_db_ring(fci->set_db); 462 return 0; 463 } 464 465 return scmi_perf_mb_level_set(ph, domain, level, poll); 466 } 467 468 static int scmi_perf_mb_level_get(const struct scmi_protocol_handle *ph, 469 u32 domain, u32 *level, bool poll) 470 { 471 int ret; 472 struct scmi_xfer *t; 473 474 ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_GET, 475 sizeof(u32), sizeof(u32), &t); 476 if (ret) 477 return ret; 478 479 t->hdr.poll_completion = poll; 480 put_unaligned_le32(domain, t->tx.buf); 481 482 ret = ph->xops->do_xfer(ph, t); 483 if (!ret) 484 *level = get_unaligned_le32(t->rx.buf); 485 486 ph->xops->xfer_put(ph, t); 487 return ret; 488 } 489 490 static int scmi_perf_level_get(const struct scmi_protocol_handle *ph, 491 u32 domain, u32 *level, bool poll) 492 { 493 struct scmi_perf_info *pi = ph->get_priv(ph); 494 struct perf_dom_info *dom = pi->dom_info + domain; 495 496 if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].get_addr) { 497 *level = ioread32(dom->fc_info[PERF_FC_LEVEL].get_addr); 498 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_GET, 499 domain, *level, 0); 500 return 0; 501 } 502 503 return scmi_perf_mb_level_get(ph, domain, level, poll); 504 } 505 506 static int scmi_perf_level_limits_notify(const struct scmi_protocol_handle *ph, 507 u32 domain, int message_id, 508 bool enable) 509 { 510 int ret; 511 struct scmi_xfer *t; 512 struct scmi_perf_notify_level_or_limits *notify; 513 514 ret = ph->xops->xfer_get_init(ph, message_id, sizeof(*notify), 0, &t); 515 if (ret) 516 return ret; 517 518 notify = t->tx.buf; 519 notify->domain = cpu_to_le32(domain); 520 notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0; 521 522 ret = ph->xops->do_xfer(ph, t); 523 524 ph->xops->xfer_put(ph, t); 525 return ret; 526 } 527 528 static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph, 529 u32 domain, struct scmi_fc_info **p_fc) 530 { 531 struct scmi_fc_info *fc; 532 533 fc = devm_kcalloc(ph->dev, PERF_FC_MAX, sizeof(*fc), GFP_KERNEL); 534 if (!fc) 535 return; 536 537 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 538 PERF_LEVEL_SET, 4, domain, 539 &fc[PERF_FC_LEVEL].set_addr, 540 &fc[PERF_FC_LEVEL].set_db); 541 542 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 543 PERF_LEVEL_GET, 4, domain, 544 &fc[PERF_FC_LEVEL].get_addr, NULL); 545 546 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 547 PERF_LIMITS_SET, 8, domain, 548 &fc[PERF_FC_LIMIT].set_addr, 549 &fc[PERF_FC_LIMIT].set_db); 550 551 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, 552 PERF_LIMITS_GET, 8, domain, 553 &fc[PERF_FC_LIMIT].get_addr, NULL); 554 555 *p_fc = fc; 556 } 557 558 /* Device specific ops */ 559 static int scmi_dev_domain_id(struct device *dev) 560 { 561 struct of_phandle_args clkspec; 562 563 if (of_parse_phandle_with_args(dev->of_node, "clocks", "#clock-cells", 564 0, &clkspec)) 565 return -EINVAL; 566 567 return clkspec.args[0]; 568 } 569 570 static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph, 571 struct device *dev) 572 { 573 int idx, ret, domain; 574 unsigned long freq; 575 struct scmi_opp *opp; 576 struct perf_dom_info *dom; 577 struct scmi_perf_info *pi = ph->get_priv(ph); 578 579 domain = scmi_dev_domain_id(dev); 580 if (domain < 0) 581 return domain; 582 583 dom = pi->dom_info + domain; 584 585 for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) { 586 freq = opp->perf * dom->mult_factor; 587 588 ret = dev_pm_opp_add(dev, freq, 0); 589 if (ret) { 590 dev_warn(dev, "failed to add opp %luHz\n", freq); 591 592 while (idx-- > 0) { 593 freq = (--opp)->perf * dom->mult_factor; 594 dev_pm_opp_remove(dev, freq); 595 } 596 return ret; 597 } 598 } 599 return 0; 600 } 601 602 static int 603 scmi_dvfs_transition_latency_get(const struct scmi_protocol_handle *ph, 604 struct device *dev) 605 { 606 struct perf_dom_info *dom; 607 struct scmi_perf_info *pi = ph->get_priv(ph); 608 int domain = scmi_dev_domain_id(dev); 609 610 if (domain < 0) 611 return domain; 612 613 dom = pi->dom_info + domain; 614 /* uS to nS */ 615 return dom->opp[dom->opp_count - 1].trans_latency_us * 1000; 616 } 617 618 static int scmi_dvfs_freq_set(const struct scmi_protocol_handle *ph, u32 domain, 619 unsigned long freq, bool poll) 620 { 621 struct scmi_perf_info *pi = ph->get_priv(ph); 622 struct perf_dom_info *dom = pi->dom_info + domain; 623 624 return scmi_perf_level_set(ph, domain, freq / dom->mult_factor, poll); 625 } 626 627 static int scmi_dvfs_freq_get(const struct scmi_protocol_handle *ph, u32 domain, 628 unsigned long *freq, bool poll) 629 { 630 int ret; 631 u32 level; 632 struct scmi_perf_info *pi = ph->get_priv(ph); 633 struct perf_dom_info *dom = pi->dom_info + domain; 634 635 ret = scmi_perf_level_get(ph, domain, &level, poll); 636 if (!ret) 637 *freq = level * dom->mult_factor; 638 639 return ret; 640 } 641 642 static int scmi_dvfs_est_power_get(const struct scmi_protocol_handle *ph, 643 u32 domain, unsigned long *freq, 644 unsigned long *power) 645 { 646 struct scmi_perf_info *pi = ph->get_priv(ph); 647 struct perf_dom_info *dom; 648 unsigned long opp_freq; 649 int idx, ret = -EINVAL; 650 struct scmi_opp *opp; 651 652 dom = pi->dom_info + domain; 653 if (!dom) 654 return -EIO; 655 656 for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) { 657 opp_freq = opp->perf * dom->mult_factor; 658 if (opp_freq < *freq) 659 continue; 660 661 *freq = opp_freq; 662 *power = opp->power; 663 ret = 0; 664 break; 665 } 666 667 return ret; 668 } 669 670 static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph, 671 struct device *dev) 672 { 673 struct perf_dom_info *dom; 674 struct scmi_perf_info *pi = ph->get_priv(ph); 675 676 dom = pi->dom_info + scmi_dev_domain_id(dev); 677 678 return dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr; 679 } 680 681 static enum scmi_power_scale 682 scmi_power_scale_get(const struct scmi_protocol_handle *ph) 683 { 684 struct scmi_perf_info *pi = ph->get_priv(ph); 685 686 return pi->power_scale; 687 } 688 689 static const struct scmi_perf_proto_ops perf_proto_ops = { 690 .limits_set = scmi_perf_limits_set, 691 .limits_get = scmi_perf_limits_get, 692 .level_set = scmi_perf_level_set, 693 .level_get = scmi_perf_level_get, 694 .device_domain_id = scmi_dev_domain_id, 695 .transition_latency_get = scmi_dvfs_transition_latency_get, 696 .device_opps_add = scmi_dvfs_device_opps_add, 697 .freq_set = scmi_dvfs_freq_set, 698 .freq_get = scmi_dvfs_freq_get, 699 .est_power_get = scmi_dvfs_est_power_get, 700 .fast_switch_possible = scmi_fast_switch_possible, 701 .power_scale_get = scmi_power_scale_get, 702 }; 703 704 static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph, 705 u8 evt_id, u32 src_id, bool enable) 706 { 707 int ret, cmd_id; 708 709 if (evt_id >= ARRAY_SIZE(evt_2_cmd)) 710 return -EINVAL; 711 712 cmd_id = evt_2_cmd[evt_id]; 713 ret = scmi_perf_level_limits_notify(ph, src_id, cmd_id, enable); 714 if (ret) 715 pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n", 716 evt_id, src_id, ret); 717 718 return ret; 719 } 720 721 static void *scmi_perf_fill_custom_report(const struct scmi_protocol_handle *ph, 722 u8 evt_id, ktime_t timestamp, 723 const void *payld, size_t payld_sz, 724 void *report, u32 *src_id) 725 { 726 void *rep = NULL; 727 728 switch (evt_id) { 729 case SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED: 730 { 731 const struct scmi_perf_limits_notify_payld *p = payld; 732 struct scmi_perf_limits_report *r = report; 733 734 if (sizeof(*p) != payld_sz) 735 break; 736 737 r->timestamp = timestamp; 738 r->agent_id = le32_to_cpu(p->agent_id); 739 r->domain_id = le32_to_cpu(p->domain_id); 740 r->range_max = le32_to_cpu(p->range_max); 741 r->range_min = le32_to_cpu(p->range_min); 742 *src_id = r->domain_id; 743 rep = r; 744 break; 745 } 746 case SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED: 747 { 748 const struct scmi_perf_level_notify_payld *p = payld; 749 struct scmi_perf_level_report *r = report; 750 751 if (sizeof(*p) != payld_sz) 752 break; 753 754 r->timestamp = timestamp; 755 r->agent_id = le32_to_cpu(p->agent_id); 756 r->domain_id = le32_to_cpu(p->domain_id); 757 r->performance_level = le32_to_cpu(p->performance_level); 758 *src_id = r->domain_id; 759 rep = r; 760 break; 761 } 762 default: 763 break; 764 } 765 766 return rep; 767 } 768 769 static int scmi_perf_get_num_sources(const struct scmi_protocol_handle *ph) 770 { 771 struct scmi_perf_info *pi = ph->get_priv(ph); 772 773 if (!pi) 774 return -EINVAL; 775 776 return pi->num_domains; 777 } 778 779 static const struct scmi_event perf_events[] = { 780 { 781 .id = SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED, 782 .max_payld_sz = sizeof(struct scmi_perf_limits_notify_payld), 783 .max_report_sz = sizeof(struct scmi_perf_limits_report), 784 }, 785 { 786 .id = SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED, 787 .max_payld_sz = sizeof(struct scmi_perf_level_notify_payld), 788 .max_report_sz = sizeof(struct scmi_perf_level_report), 789 }, 790 }; 791 792 static const struct scmi_event_ops perf_event_ops = { 793 .get_num_sources = scmi_perf_get_num_sources, 794 .set_notify_enabled = scmi_perf_set_notify_enabled, 795 .fill_custom_report = scmi_perf_fill_custom_report, 796 }; 797 798 static const struct scmi_protocol_events perf_protocol_events = { 799 .queue_sz = SCMI_PROTO_QUEUE_SZ, 800 .ops = &perf_event_ops, 801 .evts = perf_events, 802 .num_events = ARRAY_SIZE(perf_events), 803 }; 804 805 static int scmi_perf_protocol_init(const struct scmi_protocol_handle *ph) 806 { 807 int domain, ret; 808 u32 version; 809 struct scmi_perf_info *pinfo; 810 811 ret = ph->xops->version_get(ph, &version); 812 if (ret) 813 return ret; 814 815 dev_dbg(ph->dev, "Performance Version %d.%d\n", 816 PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); 817 818 pinfo = devm_kzalloc(ph->dev, sizeof(*pinfo), GFP_KERNEL); 819 if (!pinfo) 820 return -ENOMEM; 821 822 ret = scmi_perf_attributes_get(ph, pinfo); 823 if (ret) 824 return ret; 825 826 pinfo->dom_info = devm_kcalloc(ph->dev, pinfo->num_domains, 827 sizeof(*pinfo->dom_info), GFP_KERNEL); 828 if (!pinfo->dom_info) 829 return -ENOMEM; 830 831 for (domain = 0; domain < pinfo->num_domains; domain++) { 832 struct perf_dom_info *dom = pinfo->dom_info + domain; 833 834 scmi_perf_domain_attributes_get(ph, domain, dom, version); 835 scmi_perf_describe_levels_get(ph, domain, dom); 836 837 if (dom->perf_fastchannels) 838 scmi_perf_domain_init_fc(ph, domain, &dom->fc_info); 839 } 840 841 pinfo->version = version; 842 843 return ph->set_priv(ph, pinfo); 844 } 845 846 static const struct scmi_protocol scmi_perf = { 847 .id = SCMI_PROTOCOL_PERF, 848 .owner = THIS_MODULE, 849 .instance_init = &scmi_perf_protocol_init, 850 .ops = &perf_proto_ops, 851 .events = &perf_protocol_events, 852 }; 853 854 DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(perf, scmi_perf) 855