1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * System Control and Management Interface (SCMI) Performance Protocol 4 * 5 * Copyright (C) 2018-2021 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/io-64-nonatomic-hi-lo.h> 14 #include <linux/module.h> 15 #include <linux/platform_device.h> 16 #include <linux/pm_opp.h> 17 #include <linux/scmi_protocol.h> 18 #include <linux/sort.h> 19 20 #include "common.h" 21 #include "notify.h" 22 23 enum scmi_performance_protocol_cmd { 24 PERF_DOMAIN_ATTRIBUTES = 0x3, 25 PERF_DESCRIBE_LEVELS = 0x4, 26 PERF_LIMITS_SET = 0x5, 27 PERF_LIMITS_GET = 0x6, 28 PERF_LEVEL_SET = 0x7, 29 PERF_LEVEL_GET = 0x8, 30 PERF_NOTIFY_LIMITS = 0x9, 31 PERF_NOTIFY_LEVEL = 0xa, 32 PERF_DESCRIBE_FASTCHANNEL = 0xb, 33 }; 34 35 struct scmi_opp { 36 u32 perf; 37 u32 power; 38 u32 trans_latency_us; 39 }; 40 41 struct scmi_msg_resp_perf_attributes { 42 __le16 num_domains; 43 __le16 flags; 44 #define POWER_SCALE_IN_MILLIWATT(x) ((x) & BIT(0)) 45 __le32 stats_addr_low; 46 __le32 stats_addr_high; 47 __le32 stats_size; 48 }; 49 50 struct scmi_msg_resp_perf_domain_attributes { 51 __le32 flags; 52 #define SUPPORTS_SET_LIMITS(x) ((x) & BIT(31)) 53 #define SUPPORTS_SET_PERF_LVL(x) ((x) & BIT(30)) 54 #define SUPPORTS_PERF_LIMIT_NOTIFY(x) ((x) & BIT(29)) 55 #define SUPPORTS_PERF_LEVEL_NOTIFY(x) ((x) & BIT(28)) 56 #define SUPPORTS_PERF_FASTCHANNELS(x) ((x) & BIT(27)) 57 __le32 rate_limit_us; 58 __le32 sustained_freq_khz; 59 __le32 sustained_perf_level; 60 u8 name[SCMI_MAX_STR_SIZE]; 61 }; 62 63 struct scmi_msg_perf_describe_levels { 64 __le32 domain; 65 __le32 level_index; 66 }; 67 68 struct scmi_perf_set_limits { 69 __le32 domain; 70 __le32 max_level; 71 __le32 min_level; 72 }; 73 74 struct scmi_perf_get_limits { 75 __le32 max_level; 76 __le32 min_level; 77 }; 78 79 struct scmi_perf_set_level { 80 __le32 domain; 81 __le32 level; 82 }; 83 84 struct scmi_perf_notify_level_or_limits { 85 __le32 domain; 86 __le32 notify_enable; 87 }; 88 89 struct scmi_perf_limits_notify_payld { 90 __le32 agent_id; 91 __le32 domain_id; 92 __le32 range_max; 93 __le32 range_min; 94 }; 95 96 struct scmi_perf_level_notify_payld { 97 __le32 agent_id; 98 __le32 domain_id; 99 __le32 performance_level; 100 }; 101 102 struct scmi_msg_resp_perf_describe_levels { 103 __le16 num_returned; 104 __le16 num_remaining; 105 struct { 106 __le32 perf_val; 107 __le32 power; 108 __le16 transition_latency_us; 109 __le16 reserved; 110 } opp[]; 111 }; 112 113 struct scmi_perf_get_fc_info { 114 __le32 domain; 115 __le32 message_id; 116 }; 117 118 struct scmi_msg_resp_perf_desc_fc { 119 __le32 attr; 120 #define SUPPORTS_DOORBELL(x) ((x) & BIT(0)) 121 #define DOORBELL_REG_WIDTH(x) FIELD_GET(GENMASK(2, 1), (x)) 122 __le32 rate_limit; 123 __le32 chan_addr_low; 124 __le32 chan_addr_high; 125 __le32 chan_size; 126 __le32 db_addr_low; 127 __le32 db_addr_high; 128 __le32 db_set_lmask; 129 __le32 db_set_hmask; 130 __le32 db_preserve_lmask; 131 __le32 db_preserve_hmask; 132 }; 133 134 struct scmi_fc_db_info { 135 int width; 136 u64 set; 137 u64 mask; 138 void __iomem *addr; 139 }; 140 141 struct scmi_fc_info { 142 void __iomem *level_set_addr; 143 void __iomem *limit_set_addr; 144 void __iomem *level_get_addr; 145 void __iomem *limit_get_addr; 146 struct scmi_fc_db_info *level_set_db; 147 struct scmi_fc_db_info *limit_set_db; 148 }; 149 150 struct perf_dom_info { 151 bool set_limits; 152 bool set_perf; 153 bool perf_limit_notify; 154 bool perf_level_notify; 155 bool perf_fastchannels; 156 u32 opp_count; 157 u32 sustained_freq_khz; 158 u32 sustained_perf_level; 159 u32 mult_factor; 160 char name[SCMI_MAX_STR_SIZE]; 161 struct scmi_opp opp[MAX_OPPS]; 162 struct scmi_fc_info *fc_info; 163 }; 164 165 struct scmi_perf_info { 166 u32 version; 167 int num_domains; 168 bool power_scale_mw; 169 u64 stats_addr; 170 u32 stats_size; 171 struct perf_dom_info *dom_info; 172 }; 173 174 static enum scmi_performance_protocol_cmd evt_2_cmd[] = { 175 PERF_NOTIFY_LIMITS, 176 PERF_NOTIFY_LEVEL, 177 }; 178 179 static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph, 180 struct scmi_perf_info *pi) 181 { 182 int ret; 183 struct scmi_xfer *t; 184 struct scmi_msg_resp_perf_attributes *attr; 185 186 ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0, 187 sizeof(*attr), &t); 188 if (ret) 189 return ret; 190 191 attr = t->rx.buf; 192 193 ret = ph->xops->do_xfer(ph, t); 194 if (!ret) { 195 u16 flags = le16_to_cpu(attr->flags); 196 197 pi->num_domains = le16_to_cpu(attr->num_domains); 198 pi->power_scale_mw = POWER_SCALE_IN_MILLIWATT(flags); 199 pi->stats_addr = le32_to_cpu(attr->stats_addr_low) | 200 (u64)le32_to_cpu(attr->stats_addr_high) << 32; 201 pi->stats_size = le32_to_cpu(attr->stats_size); 202 } 203 204 ph->xops->xfer_put(ph, t); 205 return ret; 206 } 207 208 static int 209 scmi_perf_domain_attributes_get(const struct scmi_protocol_handle *ph, 210 u32 domain, struct perf_dom_info *dom_info) 211 { 212 int ret; 213 struct scmi_xfer *t; 214 struct scmi_msg_resp_perf_domain_attributes *attr; 215 216 ret = ph->xops->xfer_get_init(ph, PERF_DOMAIN_ATTRIBUTES, 217 sizeof(domain), sizeof(*attr), &t); 218 if (ret) 219 return ret; 220 221 put_unaligned_le32(domain, t->tx.buf); 222 attr = t->rx.buf; 223 224 ret = ph->xops->do_xfer(ph, t); 225 if (!ret) { 226 u32 flags = le32_to_cpu(attr->flags); 227 228 dom_info->set_limits = SUPPORTS_SET_LIMITS(flags); 229 dom_info->set_perf = SUPPORTS_SET_PERF_LVL(flags); 230 dom_info->perf_limit_notify = SUPPORTS_PERF_LIMIT_NOTIFY(flags); 231 dom_info->perf_level_notify = SUPPORTS_PERF_LEVEL_NOTIFY(flags); 232 dom_info->perf_fastchannels = SUPPORTS_PERF_FASTCHANNELS(flags); 233 dom_info->sustained_freq_khz = 234 le32_to_cpu(attr->sustained_freq_khz); 235 dom_info->sustained_perf_level = 236 le32_to_cpu(attr->sustained_perf_level); 237 if (!dom_info->sustained_freq_khz || 238 !dom_info->sustained_perf_level) 239 /* CPUFreq converts to kHz, hence default 1000 */ 240 dom_info->mult_factor = 1000; 241 else 242 dom_info->mult_factor = 243 (dom_info->sustained_freq_khz * 1000) / 244 dom_info->sustained_perf_level; 245 strlcpy(dom_info->name, attr->name, SCMI_MAX_STR_SIZE); 246 } 247 248 ph->xops->xfer_put(ph, t); 249 return ret; 250 } 251 252 static int opp_cmp_func(const void *opp1, const void *opp2) 253 { 254 const struct scmi_opp *t1 = opp1, *t2 = opp2; 255 256 return t1->perf - t2->perf; 257 } 258 259 static int 260 scmi_perf_describe_levels_get(const struct scmi_protocol_handle *ph, u32 domain, 261 struct perf_dom_info *perf_dom) 262 { 263 int ret, cnt; 264 u32 tot_opp_cnt = 0; 265 u16 num_returned, num_remaining; 266 struct scmi_xfer *t; 267 struct scmi_opp *opp; 268 struct scmi_msg_perf_describe_levels *dom_info; 269 struct scmi_msg_resp_perf_describe_levels *level_info; 270 271 ret = ph->xops->xfer_get_init(ph, PERF_DESCRIBE_LEVELS, 272 sizeof(*dom_info), 0, &t); 273 if (ret) 274 return ret; 275 276 dom_info = t->tx.buf; 277 level_info = t->rx.buf; 278 279 do { 280 dom_info->domain = cpu_to_le32(domain); 281 /* Set the number of OPPs to be skipped/already read */ 282 dom_info->level_index = cpu_to_le32(tot_opp_cnt); 283 284 ret = ph->xops->do_xfer(ph, t); 285 if (ret) 286 break; 287 288 num_returned = le16_to_cpu(level_info->num_returned); 289 num_remaining = le16_to_cpu(level_info->num_remaining); 290 if (tot_opp_cnt + num_returned > MAX_OPPS) { 291 dev_err(ph->dev, "No. of OPPs exceeded MAX_OPPS"); 292 break; 293 } 294 295 opp = &perf_dom->opp[tot_opp_cnt]; 296 for (cnt = 0; cnt < num_returned; cnt++, opp++) { 297 opp->perf = le32_to_cpu(level_info->opp[cnt].perf_val); 298 opp->power = le32_to_cpu(level_info->opp[cnt].power); 299 opp->trans_latency_us = le16_to_cpu 300 (level_info->opp[cnt].transition_latency_us); 301 302 dev_dbg(ph->dev, "Level %d Power %d Latency %dus\n", 303 opp->perf, opp->power, opp->trans_latency_us); 304 } 305 306 tot_opp_cnt += num_returned; 307 308 ph->xops->reset_rx_to_maxsz(ph, t); 309 /* 310 * check for both returned and remaining to avoid infinite 311 * loop due to buggy firmware 312 */ 313 } while (num_returned && num_remaining); 314 315 perf_dom->opp_count = tot_opp_cnt; 316 ph->xops->xfer_put(ph, t); 317 318 sort(perf_dom->opp, tot_opp_cnt, sizeof(*opp), opp_cmp_func, NULL); 319 return ret; 320 } 321 322 #define SCMI_PERF_FC_RING_DB(w) \ 323 do { \ 324 u##w val = 0; \ 325 \ 326 if (db->mask) \ 327 val = ioread##w(db->addr) & db->mask; \ 328 iowrite##w((u##w)db->set | val, db->addr); \ 329 } while (0) 330 331 static void scmi_perf_fc_ring_db(struct scmi_fc_db_info *db) 332 { 333 if (!db || !db->addr) 334 return; 335 336 if (db->width == 1) 337 SCMI_PERF_FC_RING_DB(8); 338 else if (db->width == 2) 339 SCMI_PERF_FC_RING_DB(16); 340 else if (db->width == 4) 341 SCMI_PERF_FC_RING_DB(32); 342 else /* db->width == 8 */ 343 #ifdef CONFIG_64BIT 344 SCMI_PERF_FC_RING_DB(64); 345 #else 346 { 347 u64 val = 0; 348 349 if (db->mask) 350 val = ioread64_hi_lo(db->addr) & db->mask; 351 iowrite64_hi_lo(db->set | val, db->addr); 352 } 353 #endif 354 } 355 356 static int scmi_perf_mb_limits_set(const struct scmi_protocol_handle *ph, 357 u32 domain, u32 max_perf, u32 min_perf) 358 { 359 int ret; 360 struct scmi_xfer *t; 361 struct scmi_perf_set_limits *limits; 362 363 ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_SET, 364 sizeof(*limits), 0, &t); 365 if (ret) 366 return ret; 367 368 limits = t->tx.buf; 369 limits->domain = cpu_to_le32(domain); 370 limits->max_level = cpu_to_le32(max_perf); 371 limits->min_level = cpu_to_le32(min_perf); 372 373 ret = ph->xops->do_xfer(ph, t); 374 375 ph->xops->xfer_put(ph, t); 376 return ret; 377 } 378 379 static int scmi_perf_limits_set(const struct scmi_protocol_handle *ph, 380 u32 domain, u32 max_perf, u32 min_perf) 381 { 382 struct scmi_perf_info *pi = ph->get_priv(ph); 383 struct perf_dom_info *dom = pi->dom_info + domain; 384 385 if (dom->fc_info && dom->fc_info->limit_set_addr) { 386 iowrite32(max_perf, dom->fc_info->limit_set_addr); 387 iowrite32(min_perf, dom->fc_info->limit_set_addr + 4); 388 scmi_perf_fc_ring_db(dom->fc_info->limit_set_db); 389 return 0; 390 } 391 392 return scmi_perf_mb_limits_set(ph, domain, max_perf, min_perf); 393 } 394 395 static int scmi_perf_mb_limits_get(const struct scmi_protocol_handle *ph, 396 u32 domain, u32 *max_perf, u32 *min_perf) 397 { 398 int ret; 399 struct scmi_xfer *t; 400 struct scmi_perf_get_limits *limits; 401 402 ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_GET, 403 sizeof(__le32), 0, &t); 404 if (ret) 405 return ret; 406 407 put_unaligned_le32(domain, t->tx.buf); 408 409 ret = ph->xops->do_xfer(ph, t); 410 if (!ret) { 411 limits = t->rx.buf; 412 413 *max_perf = le32_to_cpu(limits->max_level); 414 *min_perf = le32_to_cpu(limits->min_level); 415 } 416 417 ph->xops->xfer_put(ph, t); 418 return ret; 419 } 420 421 static int scmi_perf_limits_get(const struct scmi_protocol_handle *ph, 422 u32 domain, u32 *max_perf, u32 *min_perf) 423 { 424 struct scmi_perf_info *pi = ph->get_priv(ph); 425 struct perf_dom_info *dom = pi->dom_info + domain; 426 427 if (dom->fc_info && dom->fc_info->limit_get_addr) { 428 *max_perf = ioread32(dom->fc_info->limit_get_addr); 429 *min_perf = ioread32(dom->fc_info->limit_get_addr + 4); 430 return 0; 431 } 432 433 return scmi_perf_mb_limits_get(ph, domain, max_perf, min_perf); 434 } 435 436 static int scmi_perf_mb_level_set(const struct scmi_protocol_handle *ph, 437 u32 domain, u32 level, bool poll) 438 { 439 int ret; 440 struct scmi_xfer *t; 441 struct scmi_perf_set_level *lvl; 442 443 ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_SET, sizeof(*lvl), 0, &t); 444 if (ret) 445 return ret; 446 447 t->hdr.poll_completion = poll; 448 lvl = t->tx.buf; 449 lvl->domain = cpu_to_le32(domain); 450 lvl->level = cpu_to_le32(level); 451 452 ret = ph->xops->do_xfer(ph, t); 453 454 ph->xops->xfer_put(ph, t); 455 return ret; 456 } 457 458 static int scmi_perf_level_set(const struct scmi_protocol_handle *ph, 459 u32 domain, u32 level, bool poll) 460 { 461 struct scmi_perf_info *pi = ph->get_priv(ph); 462 struct perf_dom_info *dom = pi->dom_info + domain; 463 464 if (dom->fc_info && dom->fc_info->level_set_addr) { 465 iowrite32(level, dom->fc_info->level_set_addr); 466 scmi_perf_fc_ring_db(dom->fc_info->level_set_db); 467 return 0; 468 } 469 470 return scmi_perf_mb_level_set(ph, domain, level, poll); 471 } 472 473 static int scmi_perf_mb_level_get(const struct scmi_protocol_handle *ph, 474 u32 domain, u32 *level, bool poll) 475 { 476 int ret; 477 struct scmi_xfer *t; 478 479 ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_GET, 480 sizeof(u32), sizeof(u32), &t); 481 if (ret) 482 return ret; 483 484 t->hdr.poll_completion = poll; 485 put_unaligned_le32(domain, t->tx.buf); 486 487 ret = ph->xops->do_xfer(ph, t); 488 if (!ret) 489 *level = get_unaligned_le32(t->rx.buf); 490 491 ph->xops->xfer_put(ph, t); 492 return ret; 493 } 494 495 static int scmi_perf_level_get(const struct scmi_protocol_handle *ph, 496 u32 domain, u32 *level, bool poll) 497 { 498 struct scmi_perf_info *pi = ph->get_priv(ph); 499 struct perf_dom_info *dom = pi->dom_info + domain; 500 501 if (dom->fc_info && dom->fc_info->level_get_addr) { 502 *level = ioread32(dom->fc_info->level_get_addr); 503 return 0; 504 } 505 506 return scmi_perf_mb_level_get(ph, domain, level, poll); 507 } 508 509 static int scmi_perf_level_limits_notify(const struct scmi_protocol_handle *ph, 510 u32 domain, int message_id, 511 bool enable) 512 { 513 int ret; 514 struct scmi_xfer *t; 515 struct scmi_perf_notify_level_or_limits *notify; 516 517 ret = ph->xops->xfer_get_init(ph, message_id, sizeof(*notify), 0, &t); 518 if (ret) 519 return ret; 520 521 notify = t->tx.buf; 522 notify->domain = cpu_to_le32(domain); 523 notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0; 524 525 ret = ph->xops->do_xfer(ph, t); 526 527 ph->xops->xfer_put(ph, t); 528 return ret; 529 } 530 531 static bool scmi_perf_fc_size_is_valid(u32 msg, u32 size) 532 { 533 if ((msg == PERF_LEVEL_GET || msg == PERF_LEVEL_SET) && size == 4) 534 return true; 535 if ((msg == PERF_LIMITS_GET || msg == PERF_LIMITS_SET) && size == 8) 536 return true; 537 return false; 538 } 539 540 static void 541 scmi_perf_domain_desc_fc(const struct scmi_protocol_handle *ph, u32 domain, 542 u32 message_id, void __iomem **p_addr, 543 struct scmi_fc_db_info **p_db) 544 { 545 int ret; 546 u32 flags; 547 u64 phys_addr; 548 u8 size; 549 void __iomem *addr; 550 struct scmi_xfer *t; 551 struct scmi_fc_db_info *db; 552 struct scmi_perf_get_fc_info *info; 553 struct scmi_msg_resp_perf_desc_fc *resp; 554 555 if (!p_addr) 556 return; 557 558 ret = ph->xops->xfer_get_init(ph, PERF_DESCRIBE_FASTCHANNEL, 559 sizeof(*info), sizeof(*resp), &t); 560 if (ret) 561 return; 562 563 info = t->tx.buf; 564 info->domain = cpu_to_le32(domain); 565 info->message_id = cpu_to_le32(message_id); 566 567 ret = ph->xops->do_xfer(ph, t); 568 if (ret) 569 goto err_xfer; 570 571 resp = t->rx.buf; 572 flags = le32_to_cpu(resp->attr); 573 size = le32_to_cpu(resp->chan_size); 574 if (!scmi_perf_fc_size_is_valid(message_id, size)) 575 goto err_xfer; 576 577 phys_addr = le32_to_cpu(resp->chan_addr_low); 578 phys_addr |= (u64)le32_to_cpu(resp->chan_addr_high) << 32; 579 addr = devm_ioremap(ph->dev, phys_addr, size); 580 if (!addr) 581 goto err_xfer; 582 *p_addr = addr; 583 584 if (p_db && SUPPORTS_DOORBELL(flags)) { 585 db = devm_kzalloc(ph->dev, sizeof(*db), GFP_KERNEL); 586 if (!db) 587 goto err_xfer; 588 589 size = 1 << DOORBELL_REG_WIDTH(flags); 590 phys_addr = le32_to_cpu(resp->db_addr_low); 591 phys_addr |= (u64)le32_to_cpu(resp->db_addr_high) << 32; 592 addr = devm_ioremap(ph->dev, phys_addr, size); 593 if (!addr) 594 goto err_xfer; 595 596 db->addr = addr; 597 db->width = size; 598 db->set = le32_to_cpu(resp->db_set_lmask); 599 db->set |= (u64)le32_to_cpu(resp->db_set_hmask) << 32; 600 db->mask = le32_to_cpu(resp->db_preserve_lmask); 601 db->mask |= (u64)le32_to_cpu(resp->db_preserve_hmask) << 32; 602 *p_db = db; 603 } 604 err_xfer: 605 ph->xops->xfer_put(ph, t); 606 } 607 608 static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph, 609 u32 domain, struct scmi_fc_info **p_fc) 610 { 611 struct scmi_fc_info *fc; 612 613 fc = devm_kzalloc(ph->dev, sizeof(*fc), GFP_KERNEL); 614 if (!fc) 615 return; 616 617 scmi_perf_domain_desc_fc(ph, domain, PERF_LEVEL_SET, 618 &fc->level_set_addr, &fc->level_set_db); 619 scmi_perf_domain_desc_fc(ph, domain, PERF_LEVEL_GET, 620 &fc->level_get_addr, NULL); 621 scmi_perf_domain_desc_fc(ph, domain, PERF_LIMITS_SET, 622 &fc->limit_set_addr, &fc->limit_set_db); 623 scmi_perf_domain_desc_fc(ph, domain, PERF_LIMITS_GET, 624 &fc->limit_get_addr, NULL); 625 *p_fc = fc; 626 } 627 628 /* Device specific ops */ 629 static int scmi_dev_domain_id(struct device *dev) 630 { 631 struct of_phandle_args clkspec; 632 633 if (of_parse_phandle_with_args(dev->of_node, "clocks", "#clock-cells", 634 0, &clkspec)) 635 return -EINVAL; 636 637 return clkspec.args[0]; 638 } 639 640 static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph, 641 struct device *dev) 642 { 643 int idx, ret, domain; 644 unsigned long freq; 645 struct scmi_opp *opp; 646 struct perf_dom_info *dom; 647 struct scmi_perf_info *pi = ph->get_priv(ph); 648 649 domain = scmi_dev_domain_id(dev); 650 if (domain < 0) 651 return domain; 652 653 dom = pi->dom_info + domain; 654 655 for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) { 656 freq = opp->perf * dom->mult_factor; 657 658 ret = dev_pm_opp_add(dev, freq, 0); 659 if (ret) { 660 dev_warn(dev, "failed to add opp %luHz\n", freq); 661 662 while (idx-- > 0) { 663 freq = (--opp)->perf * dom->mult_factor; 664 dev_pm_opp_remove(dev, freq); 665 } 666 return ret; 667 } 668 } 669 return 0; 670 } 671 672 static int 673 scmi_dvfs_transition_latency_get(const struct scmi_protocol_handle *ph, 674 struct device *dev) 675 { 676 struct perf_dom_info *dom; 677 struct scmi_perf_info *pi = ph->get_priv(ph); 678 int domain = scmi_dev_domain_id(dev); 679 680 if (domain < 0) 681 return domain; 682 683 dom = pi->dom_info + domain; 684 /* uS to nS */ 685 return dom->opp[dom->opp_count - 1].trans_latency_us * 1000; 686 } 687 688 static int scmi_dvfs_freq_set(const struct scmi_protocol_handle *ph, u32 domain, 689 unsigned long freq, bool poll) 690 { 691 struct scmi_perf_info *pi = ph->get_priv(ph); 692 struct perf_dom_info *dom = pi->dom_info + domain; 693 694 return scmi_perf_level_set(ph, domain, freq / dom->mult_factor, poll); 695 } 696 697 static int scmi_dvfs_freq_get(const struct scmi_protocol_handle *ph, u32 domain, 698 unsigned long *freq, bool poll) 699 { 700 int ret; 701 u32 level; 702 struct scmi_perf_info *pi = ph->get_priv(ph); 703 struct perf_dom_info *dom = pi->dom_info + domain; 704 705 ret = scmi_perf_level_get(ph, domain, &level, poll); 706 if (!ret) 707 *freq = level * dom->mult_factor; 708 709 return ret; 710 } 711 712 static int scmi_dvfs_est_power_get(const struct scmi_protocol_handle *ph, 713 u32 domain, unsigned long *freq, 714 unsigned long *power) 715 { 716 struct scmi_perf_info *pi = ph->get_priv(ph); 717 struct perf_dom_info *dom; 718 unsigned long opp_freq; 719 int idx, ret = -EINVAL; 720 struct scmi_opp *opp; 721 722 dom = pi->dom_info + domain; 723 if (!dom) 724 return -EIO; 725 726 for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) { 727 opp_freq = opp->perf * dom->mult_factor; 728 if (opp_freq < *freq) 729 continue; 730 731 *freq = opp_freq; 732 *power = opp->power; 733 ret = 0; 734 break; 735 } 736 737 return ret; 738 } 739 740 static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph, 741 struct device *dev) 742 { 743 struct perf_dom_info *dom; 744 struct scmi_perf_info *pi = ph->get_priv(ph); 745 746 dom = pi->dom_info + scmi_dev_domain_id(dev); 747 748 return dom->fc_info && dom->fc_info->level_set_addr; 749 } 750 751 static bool scmi_power_scale_mw_get(const struct scmi_protocol_handle *ph) 752 { 753 struct scmi_perf_info *pi = ph->get_priv(ph); 754 755 return pi->power_scale_mw; 756 } 757 758 static const struct scmi_perf_proto_ops perf_proto_ops = { 759 .limits_set = scmi_perf_limits_set, 760 .limits_get = scmi_perf_limits_get, 761 .level_set = scmi_perf_level_set, 762 .level_get = scmi_perf_level_get, 763 .device_domain_id = scmi_dev_domain_id, 764 .transition_latency_get = scmi_dvfs_transition_latency_get, 765 .device_opps_add = scmi_dvfs_device_opps_add, 766 .freq_set = scmi_dvfs_freq_set, 767 .freq_get = scmi_dvfs_freq_get, 768 .est_power_get = scmi_dvfs_est_power_get, 769 .fast_switch_possible = scmi_fast_switch_possible, 770 .power_scale_mw_get = scmi_power_scale_mw_get, 771 }; 772 773 static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph, 774 u8 evt_id, u32 src_id, bool enable) 775 { 776 int ret, cmd_id; 777 778 if (evt_id >= ARRAY_SIZE(evt_2_cmd)) 779 return -EINVAL; 780 781 cmd_id = evt_2_cmd[evt_id]; 782 ret = scmi_perf_level_limits_notify(ph, src_id, cmd_id, enable); 783 if (ret) 784 pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n", 785 evt_id, src_id, ret); 786 787 return ret; 788 } 789 790 static void *scmi_perf_fill_custom_report(const struct scmi_protocol_handle *ph, 791 u8 evt_id, ktime_t timestamp, 792 const void *payld, size_t payld_sz, 793 void *report, u32 *src_id) 794 { 795 void *rep = NULL; 796 797 switch (evt_id) { 798 case SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED: 799 { 800 const struct scmi_perf_limits_notify_payld *p = payld; 801 struct scmi_perf_limits_report *r = report; 802 803 if (sizeof(*p) != payld_sz) 804 break; 805 806 r->timestamp = timestamp; 807 r->agent_id = le32_to_cpu(p->agent_id); 808 r->domain_id = le32_to_cpu(p->domain_id); 809 r->range_max = le32_to_cpu(p->range_max); 810 r->range_min = le32_to_cpu(p->range_min); 811 *src_id = r->domain_id; 812 rep = r; 813 break; 814 } 815 case SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED: 816 { 817 const struct scmi_perf_level_notify_payld *p = payld; 818 struct scmi_perf_level_report *r = report; 819 820 if (sizeof(*p) != payld_sz) 821 break; 822 823 r->timestamp = timestamp; 824 r->agent_id = le32_to_cpu(p->agent_id); 825 r->domain_id = le32_to_cpu(p->domain_id); 826 r->performance_level = le32_to_cpu(p->performance_level); 827 *src_id = r->domain_id; 828 rep = r; 829 break; 830 } 831 default: 832 break; 833 } 834 835 return rep; 836 } 837 838 static int scmi_perf_get_num_sources(const struct scmi_protocol_handle *ph) 839 { 840 struct scmi_perf_info *pi = ph->get_priv(ph); 841 842 if (!pi) 843 return -EINVAL; 844 845 return pi->num_domains; 846 } 847 848 static const struct scmi_event perf_events[] = { 849 { 850 .id = SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED, 851 .max_payld_sz = sizeof(struct scmi_perf_limits_notify_payld), 852 .max_report_sz = sizeof(struct scmi_perf_limits_report), 853 }, 854 { 855 .id = SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED, 856 .max_payld_sz = sizeof(struct scmi_perf_level_notify_payld), 857 .max_report_sz = sizeof(struct scmi_perf_level_report), 858 }, 859 }; 860 861 static const struct scmi_event_ops perf_event_ops = { 862 .get_num_sources = scmi_perf_get_num_sources, 863 .set_notify_enabled = scmi_perf_set_notify_enabled, 864 .fill_custom_report = scmi_perf_fill_custom_report, 865 }; 866 867 static const struct scmi_protocol_events perf_protocol_events = { 868 .queue_sz = SCMI_PROTO_QUEUE_SZ, 869 .ops = &perf_event_ops, 870 .evts = perf_events, 871 .num_events = ARRAY_SIZE(perf_events), 872 }; 873 874 static int scmi_perf_protocol_init(const struct scmi_protocol_handle *ph) 875 { 876 int domain; 877 u32 version; 878 struct scmi_perf_info *pinfo; 879 880 ph->xops->version_get(ph, &version); 881 882 dev_dbg(ph->dev, "Performance Version %d.%d\n", 883 PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); 884 885 pinfo = devm_kzalloc(ph->dev, sizeof(*pinfo), GFP_KERNEL); 886 if (!pinfo) 887 return -ENOMEM; 888 889 scmi_perf_attributes_get(ph, pinfo); 890 891 pinfo->dom_info = devm_kcalloc(ph->dev, pinfo->num_domains, 892 sizeof(*pinfo->dom_info), GFP_KERNEL); 893 if (!pinfo->dom_info) 894 return -ENOMEM; 895 896 for (domain = 0; domain < pinfo->num_domains; domain++) { 897 struct perf_dom_info *dom = pinfo->dom_info + domain; 898 899 scmi_perf_domain_attributes_get(ph, domain, dom); 900 scmi_perf_describe_levels_get(ph, domain, dom); 901 902 if (dom->perf_fastchannels) 903 scmi_perf_domain_init_fc(ph, domain, &dom->fc_info); 904 } 905 906 pinfo->version = version; 907 908 return ph->set_priv(ph, pinfo); 909 } 910 911 static const struct scmi_protocol scmi_perf = { 912 .id = SCMI_PROTOCOL_PERF, 913 .owner = THIS_MODULE, 914 .instance_init = &scmi_perf_protocol_init, 915 .ops = &perf_proto_ops, 916 .events = &perf_protocol_events, 917 }; 918 919 DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(perf, scmi_perf) 920