drivers/firmware/arm_scmi/perf.c

   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 rate_limit_us;
 157         u32 sustained_freq_khz;
 158         u32 sustained_perf_level;
 159         unsigned long mult_factor;
 160         struct scmi_perf_domain_info info;
 161         struct scmi_opp opp[MAX_OPPS];
 162         struct scmi_fc_info *fc_info;
 163         struct xarray opps_by_idx;
 164         struct xarray opps_by_lvl;
 165         DECLARE_HASHTABLE(opps_by_freq, ilog2(MAX_OPPS));
 166 };
 167
 168 #define LOOKUP_BY_FREQ(__htp, __freq)                                   \
 169 ({                                                                      \
 170                 /* u32 cast is needed to pick right hash func */        \
 171                 u32 f_ = (u32)(__freq);                                 \
 172                 struct scmi_opp *_opp;                                  \
 173                                                                         \
 174                 hash_for_each_possible((__htp), _opp, hash, f_)         \
 175                         if (_opp->indicative_freq == f_)                \
 176                                 break;                                  \
 177                 _opp;                                                   \
 178 })
 179
 180 struct scmi_perf_info {
 181         u32 version;
 182         u16 num_domains;
 183         enum scmi_power_scale power_scale;
 184         u64 stats_addr;
 185         u32 stats_size;
 186         bool notify_lvl_cmd;
 187         bool notify_lim_cmd;
 188         struct perf_dom_info *dom_info;
 189 };
 190
 191 static enum scmi_performance_protocol_cmd evt_2_cmd[] = {
 192         PERF_NOTIFY_LIMITS,
 193         PERF_NOTIFY_LEVEL,
 194 };
 195
 196 static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph,
 197                                     struct scmi_perf_info *pi)
 198 {
 199         int ret;
 200         struct scmi_xfer *t;
 201         struct scmi_msg_resp_perf_attributes *attr;
 202
 203         ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0,
 204                                       sizeof(*attr), &t);
 205         if (ret)
 206                 return ret;
 207
 208         attr = t->rx.buf;
 209
 210         ret = ph->xops->do_xfer(ph, t);
 211         if (!ret) {
 212                 u16 flags = le16_to_cpu(attr->flags);
 213
 214                 pi->num_domains = le16_to_cpu(attr->num_domains);
 215
 216                 if (POWER_SCALE_IN_MILLIWATT(flags))
 217                         pi->power_scale = SCMI_POWER_MILLIWATTS;
 218                 if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3)
 219                         if (POWER_SCALE_IN_MICROWATT(flags))
 220                                 pi->power_scale = SCMI_POWER_MICROWATTS;
 221
 222                 pi->stats_addr = le32_to_cpu(attr->stats_addr_low) |
 223                                 (u64)le32_to_cpu(attr->stats_addr_high) << 32;
 224                 pi->stats_size = le32_to_cpu(attr->stats_size);
 225         }
 226
 227         ph->xops->xfer_put(ph, t);
 228
 229         if (!ret) {
 230                 if (!ph->hops->protocol_msg_check(ph, PERF_NOTIFY_LEVEL, NULL))
 231                         pi->notify_lvl_cmd = true;
 232
 233                 if (!ph->hops->protocol_msg_check(ph, PERF_NOTIFY_LIMITS, NULL))
 234                         pi->notify_lim_cmd = true;
 235         }
 236
 237         return ret;
 238 }
 239
 240 static void scmi_perf_xa_destroy(void *data)
 241 {
 242         int domain;
 243         struct scmi_perf_info *pinfo = data;
 244
 245         for (domain = 0; domain < pinfo->num_domains; domain++) {
 246                 xa_destroy(&((pinfo->dom_info + domain)->opps_by_idx));
 247                 xa_destroy(&((pinfo->dom_info + domain)->opps_by_lvl));
 248         }
 249 }
 250
 251 static int
 252 scmi_perf_domain_attributes_get(const struct scmi_protocol_handle *ph,
 253                                 struct perf_dom_info *dom_info,
 254                                 bool notify_lim_cmd, bool notify_lvl_cmd,
 255                                 u32 version)
 256 {
 257         int ret;
 258         u32 flags;
 259         struct scmi_xfer *t;
 260         struct scmi_msg_resp_perf_domain_attributes *attr;
 261
 262         ret = ph->xops->xfer_get_init(ph, PERF_DOMAIN_ATTRIBUTES,
 263                                       sizeof(dom_info->id), sizeof(*attr), &t);
 264         if (ret)
 265                 return ret;
 266
 267         put_unaligned_le32(dom_info->id, t->tx.buf);
 268         attr = t->rx.buf;
 269
 270         ret = ph->xops->do_xfer(ph, t);
 271         if (!ret) {
 272                 flags = le32_to_cpu(attr->flags);
 273
 274                 dom_info->set_limits = SUPPORTS_SET_LIMITS(flags);
 275                 dom_info->info.set_perf = SUPPORTS_SET_PERF_LVL(flags);
 276                 if (notify_lim_cmd)
 277                         dom_info->perf_limit_notify =
 278                                 SUPPORTS_PERF_LIMIT_NOTIFY(flags);
 279                 if (notify_lvl_cmd)
 280                         dom_info->perf_level_notify =
 281                                 SUPPORTS_PERF_LEVEL_NOTIFY(flags);
 282                 dom_info->perf_fastchannels = SUPPORTS_PERF_FASTCHANNELS(flags);
 283                 if (PROTOCOL_REV_MAJOR(version) >= 0x4)
 284                         dom_info->level_indexing_mode =
 285                                 SUPPORTS_LEVEL_INDEXING(flags);
 286                 dom_info->rate_limit_us = le32_to_cpu(attr->rate_limit_us) &
 287                                                 GENMASK(19, 0);
 288                 dom_info->sustained_freq_khz =
 289                                         le32_to_cpu(attr->sustained_freq_khz);
 290                 dom_info->sustained_perf_level =
 291                                         le32_to_cpu(attr->sustained_perf_level);
 292                 /*
 293                  * sustained_freq_khz = mult_factor * sustained_perf_level
 294                  * mult_factor must be non zero positive integer(not fraction)
 295                  */
 296                 if (!dom_info->sustained_freq_khz ||
 297                     !dom_info->sustained_perf_level ||
 298                     dom_info->level_indexing_mode) {
 299                         /* CPUFreq converts to kHz, hence default 1000 */
 300                         dom_info->mult_factor = 1000;
 301                 } else {
 302                         dom_info->mult_factor =
 303                                         (dom_info->sustained_freq_khz * 1000UL)
 304                                         / dom_info->sustained_perf_level;
 305                         if ((dom_info->sustained_freq_khz * 1000UL) %
 306                             dom_info->sustained_perf_level)
 307                                 dev_warn(ph->dev,
 308                                          "multiplier for domain %d rounded\n",
 309                                          dom_info->id);
 310                 }
 311                 if (!dom_info->mult_factor)
 312                         dev_warn(ph->dev,
 313                                  "Wrong sustained perf/frequency(domain %d)\n",
 314                                  dom_info->id);
 315
 316                 strscpy(dom_info->info.name, attr->name,
 317                         SCMI_SHORT_NAME_MAX_SIZE);
 318         }
 319
 320         ph->xops->xfer_put(ph, t);
 321
 322         /*
 323          * If supported overwrite short name with the extended one;
 324          * on error just carry on and use already provided short name.
 325          */
 326         if (!ret && PROTOCOL_REV_MAJOR(version) >= 0x3 &&
 327             SUPPORTS_EXTENDED_NAMES(flags))
 328                 ph->hops->extended_name_get(ph, PERF_DOMAIN_NAME_GET,
 329                                             dom_info->id, NULL, dom_info->info.name,
 330                                             SCMI_MAX_STR_SIZE);
 331
 332         xa_init(&dom_info->opps_by_lvl);
 333         if (dom_info->level_indexing_mode) {
 334                 xa_init(&dom_info->opps_by_idx);
 335                 hash_init(dom_info->opps_by_freq);
 336         }
 337
 338         return ret;
 339 }
 340
 341 static int opp_cmp_func(const void *opp1, const void *opp2)
 342 {
 343         const struct scmi_opp *t1 = opp1, *t2 = opp2;
 344
 345         return t1->perf - t2->perf;
 346 }
 347
 348 struct scmi_perf_ipriv {
 349         u32 version;
 350         struct perf_dom_info *perf_dom;
 351 };
 352
 353 static void iter_perf_levels_prepare_message(void *message,
 354                                              unsigned int desc_index,
 355                                              const void *priv)
 356 {
 357         struct scmi_msg_perf_describe_levels *msg = message;
 358         const struct scmi_perf_ipriv *p = priv;
 359
 360         msg->domain = cpu_to_le32(p->perf_dom->id);
 361         /* Set the number of OPPs to be skipped/already read */
 362         msg->level_index = cpu_to_le32(desc_index);
 363 }
 364
 365 static int iter_perf_levels_update_state(struct scmi_iterator_state *st,
 366                                          const void *response, void *priv)
 367 {
 368         const struct scmi_msg_resp_perf_describe_levels *r = response;
 369
 370         st->num_returned = le16_to_cpu(r->num_returned);
 371         st->num_remaining = le16_to_cpu(r->num_remaining);
 372
 373         return 0;
 374 }
 375
 376 static inline void
 377 process_response_opp(struct device *dev, struct perf_dom_info *dom,
 378                      struct scmi_opp *opp, unsigned int loop_idx,
 379                      const struct scmi_msg_resp_perf_describe_levels *r)
 380 {
 381         int ret;
 382
 383         opp->perf = le32_to_cpu(r->opp[loop_idx].perf_val);
 384         opp->power = le32_to_cpu(r->opp[loop_idx].power);
 385         opp->trans_latency_us =
 386                 le16_to_cpu(r->opp[loop_idx].transition_latency_us);
 387
 388         ret = xa_insert(&dom->opps_by_lvl, opp->perf, opp, GFP_KERNEL);
 389         if (ret)
 390                 dev_warn(dev, "Failed to add opps_by_lvl at %d for %s - ret:%d\n",
 391                          opp->perf, dom->info.name, ret);
 392 }
 393
 394 static inline void
 395 process_response_opp_v4(struct device *dev, struct perf_dom_info *dom,
 396                         struct scmi_opp *opp, unsigned int loop_idx,
 397                         const struct scmi_msg_resp_perf_describe_levels_v4 *r)
 398 {
 399         int ret;
 400
 401         opp->perf = le32_to_cpu(r->opp[loop_idx].perf_val);
 402         opp->power = le32_to_cpu(r->opp[loop_idx].power);
 403         opp->trans_latency_us =
 404                 le16_to_cpu(r->opp[loop_idx].transition_latency_us);
 405
 406         ret = xa_insert(&dom->opps_by_lvl, opp->perf, opp, GFP_KERNEL);
 407         if (ret)
 408                 dev_warn(dev, "Failed to add opps_by_lvl at %d for %s - ret:%d\n",
 409                          opp->perf, dom->info.name, ret);
 410
 411         /* Note that PERF v4 reports always five 32-bit words */
 412         opp->indicative_freq = le32_to_cpu(r->opp[loop_idx].indicative_freq);
 413         if (dom->level_indexing_mode) {
 414                 opp->level_index = le32_to_cpu(r->opp[loop_idx].level_index);
 415
 416                 ret = xa_insert(&dom->opps_by_idx, opp->level_index, opp,
 417                                 GFP_KERNEL);
 418                 if (ret)
 419                         dev_warn(dev,
 420                                  "Failed to add opps_by_idx at %d for %s - ret:%d\n",
 421                                  opp->level_index, dom->info.name, ret);
 422
 423                 hash_add(dom->opps_by_freq, &opp->hash, opp->indicative_freq);
 424         }
 425 }
 426
 427 static int
 428 iter_perf_levels_process_response(const struct scmi_protocol_handle *ph,
 429                                   const void *response,
 430                                   struct scmi_iterator_state *st, void *priv)
 431 {
 432         struct scmi_opp *opp;
 433         struct scmi_perf_ipriv *p = priv;
 434
 435         opp = &p->perf_dom->opp[st->desc_index + st->loop_idx];
 436         if (PROTOCOL_REV_MAJOR(p->version) <= 0x3)
 437                 process_response_opp(ph->dev, p->perf_dom, opp, st->loop_idx,
 438                                      response);
 439         else
 440                 process_response_opp_v4(ph->dev, p->perf_dom, opp, st->loop_idx,
 441                                         response);
 442         p->perf_dom->opp_count++;
 443
 444         dev_dbg(ph->dev, "Level %d Power %d Latency %dus Ifreq %d Index %d\n",
 445                 opp->perf, opp->power, opp->trans_latency_us,
 446                 opp->indicative_freq, opp->level_index);
 447
 448         return 0;
 449 }
 450
 451 static int
 452 scmi_perf_describe_levels_get(const struct scmi_protocol_handle *ph,
 453                               struct perf_dom_info *perf_dom, u32 version)
 454 {
 455         int ret;
 456         void *iter;
 457         struct scmi_iterator_ops ops = {
 458                 .prepare_message = iter_perf_levels_prepare_message,
 459                 .update_state = iter_perf_levels_update_state,
 460                 .process_response = iter_perf_levels_process_response,
 461         };
 462         struct scmi_perf_ipriv ppriv = {
 463                 .version = version,
 464                 .perf_dom = perf_dom,
 465         };
 466
 467         iter = ph->hops->iter_response_init(ph, &ops, MAX_OPPS,
 468                                             PERF_DESCRIBE_LEVELS,
 469                                             sizeof(struct scmi_msg_perf_describe_levels),
 470                                             &ppriv);
 471         if (IS_ERR(iter))
 472                 return PTR_ERR(iter);
 473
 474         ret = ph->hops->iter_response_run(iter);
 475         if (ret)
 476                 return ret;
 477
 478         if (perf_dom->opp_count)
 479                 sort(perf_dom->opp, perf_dom->opp_count,
 480                      sizeof(struct scmi_opp), opp_cmp_func, NULL);
 481
 482         return ret;
 483 }
 484
 485 static int scmi_perf_num_domains_get(const struct scmi_protocol_handle *ph)
 486 {
 487         struct scmi_perf_info *pi = ph->get_priv(ph);
 488
 489         return pi->num_domains;
 490 }
 491
 492 static inline struct perf_dom_info *
 493 scmi_perf_domain_lookup(const struct scmi_protocol_handle *ph, u32 domain)
 494 {
 495         struct scmi_perf_info *pi = ph->get_priv(ph);
 496
 497         if (domain >= pi->num_domains)
 498                 return ERR_PTR(-EINVAL);
 499
 500         return pi->dom_info + domain;
 501 }
 502
 503 static const struct scmi_perf_domain_info *
 504 scmi_perf_info_get(const struct scmi_protocol_handle *ph, u32 domain)
 505 {
 506         struct perf_dom_info *dom;
 507
 508         dom = scmi_perf_domain_lookup(ph, domain);
 509         if (IS_ERR(dom))
 510                 return ERR_PTR(-EINVAL);
 511
 512         return &dom->info;
 513 }
 514
 515 static int scmi_perf_msg_limits_set(const struct scmi_protocol_handle *ph,
 516                                     u32 domain, u32 max_perf, u32 min_perf)
 517 {
 518         int ret;
 519         struct scmi_xfer *t;
 520         struct scmi_perf_set_limits *limits;
 521
 522         ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_SET,
 523                                       sizeof(*limits), 0, &t);
 524         if (ret)
 525                 return ret;
 526
 527         limits = t->tx.buf;
 528         limits->domain = cpu_to_le32(domain);
 529         limits->max_level = cpu_to_le32(max_perf);
 530         limits->min_level = cpu_to_le32(min_perf);
 531
 532         ret = ph->xops->do_xfer(ph, t);
 533
 534         ph->xops->xfer_put(ph, t);
 535         return ret;
 536 }
 537
 538 static int __scmi_perf_limits_set(const struct scmi_protocol_handle *ph,
 539                                   struct perf_dom_info *dom, u32 max_perf,
 540                                   u32 min_perf)
 541 {
 542         if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].set_addr) {
 543                 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT];
 544
 545                 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_SET,
 546                                    dom->id, min_perf, max_perf);
 547                 iowrite32(max_perf, fci->set_addr);
 548                 iowrite32(min_perf, fci->set_addr + 4);
 549                 ph->hops->fastchannel_db_ring(fci->set_db);
 550                 return 0;
 551         }
 552
 553         return scmi_perf_msg_limits_set(ph, dom->id, max_perf, min_perf);
 554 }
 555
 556 static int scmi_perf_limits_set(const struct scmi_protocol_handle *ph,
 557                                 u32 domain, u32 max_perf, u32 min_perf)
 558 {
 559         struct scmi_perf_info *pi = ph->get_priv(ph);
 560         struct perf_dom_info *dom;
 561
 562         dom = scmi_perf_domain_lookup(ph, domain);
 563         if (IS_ERR(dom))
 564                 return PTR_ERR(dom);
 565
 566         if (!dom->set_limits)
 567                 return -EOPNOTSUPP;
 568
 569         if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3 && !max_perf && !min_perf)
 570                 return -EINVAL;
 571
 572         if (dom->level_indexing_mode) {
 573                 struct scmi_opp *opp;
 574
 575                 if (min_perf) {
 576                         opp = xa_load(&dom->opps_by_lvl, min_perf);
 577                         if (!opp)
 578                                 return -EIO;
 579
 580                         min_perf = opp->level_index;
 581                 }
 582
 583                 if (max_perf) {
 584                         opp = xa_load(&dom->opps_by_lvl, max_perf);
 585                         if (!opp)
 586                                 return -EIO;
 587
 588                         max_perf = opp->level_index;
 589                 }
 590         }
 591
 592         return __scmi_perf_limits_set(ph, dom, max_perf, min_perf);
 593 }
 594
 595 static int scmi_perf_msg_limits_get(const struct scmi_protocol_handle *ph,
 596                                     u32 domain, u32 *max_perf, u32 *min_perf)
 597 {
 598         int ret;
 599         struct scmi_xfer *t;
 600         struct scmi_perf_get_limits *limits;
 601
 602         ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_GET,
 603                                       sizeof(__le32), 0, &t);
 604         if (ret)
 605                 return ret;
 606
 607         put_unaligned_le32(domain, t->tx.buf);
 608
 609         ret = ph->xops->do_xfer(ph, t);
 610         if (!ret) {
 611                 limits = t->rx.buf;
 612
 613                 *max_perf = le32_to_cpu(limits->max_level);
 614                 *min_perf = le32_to_cpu(limits->min_level);
 615         }
 616
 617         ph->xops->xfer_put(ph, t);
 618         return ret;
 619 }
 620
 621 static int __scmi_perf_limits_get(const struct scmi_protocol_handle *ph,
 622                                   struct perf_dom_info *dom, u32 *max_perf,
 623                                   u32 *min_perf)
 624 {
 625         if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].get_addr) {
 626                 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT];
 627
 628                 *max_perf = ioread32(fci->get_addr);
 629                 *min_perf = ioread32(fci->get_addr + 4);
 630                 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_GET,
 631                                    dom->id, *min_perf, *max_perf);
 632                 return 0;
 633         }
 634
 635         return scmi_perf_msg_limits_get(ph, dom->id, max_perf, min_perf);
 636 }
 637
 638 static int scmi_perf_limits_get(const struct scmi_protocol_handle *ph,
 639                                 u32 domain, u32 *max_perf, u32 *min_perf)
 640 {
 641         int ret;
 642         struct perf_dom_info *dom;
 643
 644         dom = scmi_perf_domain_lookup(ph, domain);
 645         if (IS_ERR(dom))
 646                 return PTR_ERR(dom);
 647
 648         ret = __scmi_perf_limits_get(ph, dom, max_perf, min_perf);
 649         if (ret)
 650                 return ret;
 651
 652         if (dom->level_indexing_mode) {
 653                 struct scmi_opp *opp;
 654
 655                 opp = xa_load(&dom->opps_by_idx, *min_perf);
 656                 if (!opp)
 657                         return -EIO;
 658
 659                 *min_perf = opp->perf;
 660
 661                 opp = xa_load(&dom->opps_by_idx, *max_perf);
 662                 if (!opp)
 663                         return -EIO;
 664
 665                 *max_perf = opp->perf;
 666         }
 667
 668         return 0;
 669 }
 670
 671 static int scmi_perf_msg_level_set(const struct scmi_protocol_handle *ph,
 672                                    u32 domain, u32 level, bool poll)
 673 {
 674         int ret;
 675         struct scmi_xfer *t;
 676         struct scmi_perf_set_level *lvl;
 677
 678         ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_SET, sizeof(*lvl), 0, &t);
 679         if (ret)
 680                 return ret;
 681
 682         t->hdr.poll_completion = poll;
 683         lvl = t->tx.buf;
 684         lvl->domain = cpu_to_le32(domain);
 685         lvl->level = cpu_to_le32(level);
 686
 687         ret = ph->xops->do_xfer(ph, t);
 688
 689         ph->xops->xfer_put(ph, t);
 690         return ret;
 691 }
 692
 693 static int __scmi_perf_level_set(const struct scmi_protocol_handle *ph,
 694                                  struct perf_dom_info *dom, u32 level,
 695                                  bool poll)
 696 {
 697         if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr) {
 698                 struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LEVEL];
 699
 700                 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_SET,
 701                                    dom->id, level, 0);
 702                 iowrite32(level, fci->set_addr);
 703                 ph->hops->fastchannel_db_ring(fci->set_db);
 704                 return 0;
 705         }
 706
 707         return scmi_perf_msg_level_set(ph, dom->id, level, poll);
 708 }
 709
 710 static int scmi_perf_level_set(const struct scmi_protocol_handle *ph,
 711                                u32 domain, u32 level, bool poll)
 712 {
 713         struct perf_dom_info *dom;
 714
 715         dom = scmi_perf_domain_lookup(ph, domain);
 716         if (IS_ERR(dom))
 717                 return PTR_ERR(dom);
 718
 719         if (!dom->info.set_perf)
 720                 return -EOPNOTSUPP;
 721
 722         if (dom->level_indexing_mode) {
 723                 struct scmi_opp *opp;
 724
 725                 opp = xa_load(&dom->opps_by_lvl, level);
 726                 if (!opp)
 727                         return -EIO;
 728
 729                 level = opp->level_index;
 730         }
 731
 732         return __scmi_perf_level_set(ph, dom, level, poll);
 733 }
 734
 735 static int scmi_perf_msg_level_get(const struct scmi_protocol_handle *ph,
 736                                    u32 domain, u32 *level, bool poll)
 737 {
 738         int ret;
 739         struct scmi_xfer *t;
 740
 741         ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_GET,
 742                                      sizeof(u32), sizeof(u32), &t);
 743         if (ret)
 744                 return ret;
 745
 746         t->hdr.poll_completion = poll;
 747         put_unaligned_le32(domain, t->tx.buf);
 748
 749         ret = ph->xops->do_xfer(ph, t);
 750         if (!ret)
 751                 *level = get_unaligned_le32(t->rx.buf);
 752
 753         ph->xops->xfer_put(ph, t);
 754         return ret;
 755 }
 756
 757 static int __scmi_perf_level_get(const struct scmi_protocol_handle *ph,
 758                                  struct perf_dom_info *dom, u32 *level,
 759                                  bool poll)
 760 {
 761         if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].get_addr) {
 762                 *level = ioread32(dom->fc_info[PERF_FC_LEVEL].get_addr);
 763                 trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_GET,
 764                                    dom->id, *level, 0);
 765                 return 0;
 766         }
 767
 768         return scmi_perf_msg_level_get(ph, dom->id, level, poll);
 769 }
 770
 771 static int scmi_perf_level_get(const struct scmi_protocol_handle *ph,
 772                                u32 domain, u32 *level, bool poll)
 773 {
 774         int ret;
 775         struct perf_dom_info *dom;
 776
 777         dom = scmi_perf_domain_lookup(ph, domain);
 778         if (IS_ERR(dom))
 779                 return PTR_ERR(dom);
 780
 781         ret = __scmi_perf_level_get(ph, dom, level, poll);
 782         if (ret)
 783                 return ret;
 784
 785         if (dom->level_indexing_mode) {
 786                 struct scmi_opp *opp;
 787
 788                 opp = xa_load(&dom->opps_by_idx, *level);
 789                 if (!opp)
 790                         return -EIO;
 791
 792                 *level = opp->perf;
 793         }
 794
 795         return 0;
 796 }
 797
 798 static int scmi_perf_level_limits_notify(const struct scmi_protocol_handle *ph,
 799                                          u32 domain, int message_id,
 800                                          bool enable)
 801 {
 802         int ret;
 803         struct scmi_xfer *t;
 804         struct scmi_perf_notify_level_or_limits *notify;
 805
 806         ret = ph->xops->xfer_get_init(ph, message_id, sizeof(*notify), 0, &t);
 807         if (ret)
 808                 return ret;
 809
 810         notify = t->tx.buf;
 811         notify->domain = cpu_to_le32(domain);
 812         notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0;
 813
 814         ret = ph->xops->do_xfer(ph, t);
 815
 816         ph->xops->xfer_put(ph, t);
 817         return ret;
 818 }
 819
 820 static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph,
 821                                      struct perf_dom_info *dom)
 822 {
 823         struct scmi_fc_info *fc;
 824
 825         fc = devm_kcalloc(ph->dev, PERF_FC_MAX, sizeof(*fc), GFP_KERNEL);
 826         if (!fc)
 827                 return;
 828
 829         ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
 830                                    PERF_LEVEL_GET, 4, dom->id,
 831                                    &fc[PERF_FC_LEVEL].get_addr, NULL,
 832                                    &fc[PERF_FC_LEVEL].rate_limit);
 833
 834         ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
 835                                    PERF_LIMITS_GET, 8, dom->id,
 836                                    &fc[PERF_FC_LIMIT].get_addr, NULL,
 837                                    &fc[PERF_FC_LIMIT].rate_limit);
 838
 839         if (dom->info.set_perf)
 840                 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
 841                                            PERF_LEVEL_SET, 4, dom->id,
 842                                            &fc[PERF_FC_LEVEL].set_addr,
 843                                            &fc[PERF_FC_LEVEL].set_db,
 844                                            &fc[PERF_FC_LEVEL].rate_limit);
 845
 846         if (dom->set_limits)
 847                 ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
 848                                            PERF_LIMITS_SET, 8, dom->id,
 849                                            &fc[PERF_FC_LIMIT].set_addr,
 850                                            &fc[PERF_FC_LIMIT].set_db,
 851                                            &fc[PERF_FC_LIMIT].rate_limit);
 852
 853         dom->fc_info = fc;
 854 }
 855
 856 static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph,
 857                                      struct device *dev, u32 domain)
 858 {
 859         int idx, ret;
 860         unsigned long freq;
 861         struct dev_pm_opp_data data = {};
 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         for (idx = 0; idx < dom->opp_count; idx++) {
 869                 if (!dom->level_indexing_mode)
 870                         freq = dom->opp[idx].perf * dom->mult_factor;
 871                 else
 872                         freq = dom->opp[idx].indicative_freq * dom->mult_factor;
 873
 874                 /* All OPPs above the sustained frequency are treated as turbo */
 875                 data.turbo = freq > dom->sustained_freq_khz * 1000;
 876
 877                 data.level = dom->opp[idx].perf;
 878                 data.freq = freq;
 879
 880                 ret = dev_pm_opp_add_dynamic(dev, &data);
 881                 if (ret) {
 882                         dev_warn(dev, "[%d][%s]: Failed to add OPP[%d] %lu\n",
 883                                  domain, dom->info.name, idx, freq);
 884                         dev_pm_opp_remove_all_dynamic(dev);
 885                         return ret;
 886                 }
 887
 888                 dev_dbg(dev, "[%d][%s]:: Registered OPP[%d] %lu\n",
 889                         domain, dom->info.name, idx, freq);
 890         }
 891         return 0;
 892 }
 893
 894 static int
 895 scmi_dvfs_transition_latency_get(const struct scmi_protocol_handle *ph,
 896                                  u32 domain)
 897 {
 898         struct perf_dom_info *dom;
 899
 900         dom = scmi_perf_domain_lookup(ph, domain);
 901         if (IS_ERR(dom))
 902                 return PTR_ERR(dom);
 903
 904         /* uS to nS */
 905         return dom->opp[dom->opp_count - 1].trans_latency_us * 1000;
 906 }
 907
 908 static int
 909 scmi_dvfs_rate_limit_get(const struct scmi_protocol_handle *ph,
 910                          u32 domain, u32 *rate_limit)
 911 {
 912         struct perf_dom_info *dom;
 913
 914         if (!rate_limit)
 915                 return -EINVAL;
 916
 917         dom = scmi_perf_domain_lookup(ph, domain);
 918         if (IS_ERR(dom))
 919                 return PTR_ERR(dom);
 920
 921         *rate_limit = dom->rate_limit_us;
 922         return 0;
 923 }
 924
 925 static int scmi_dvfs_freq_set(const struct scmi_protocol_handle *ph, u32 domain,
 926                               unsigned long freq, bool poll)
 927 {
 928         unsigned int level;
 929         struct perf_dom_info *dom;
 930
 931         dom = scmi_perf_domain_lookup(ph, domain);
 932         if (IS_ERR(dom))
 933                 return PTR_ERR(dom);
 934
 935         if (!dom->level_indexing_mode) {
 936                 level = freq / dom->mult_factor;
 937         } else {
 938                 struct scmi_opp *opp;
 939
 940                 opp = LOOKUP_BY_FREQ(dom->opps_by_freq,
 941                                      freq / dom->mult_factor);
 942                 if (!opp)
 943                         return -EIO;
 944
 945                 level = opp->level_index;
 946         }
 947
 948         return __scmi_perf_level_set(ph, dom, level, poll);
 949 }
 950
 951 static int scmi_dvfs_freq_get(const struct scmi_protocol_handle *ph, u32 domain,
 952                               unsigned long *freq, bool poll)
 953 {
 954         int ret;
 955         u32 level;
 956         struct perf_dom_info *dom;
 957
 958         dom = scmi_perf_domain_lookup(ph, domain);
 959         if (IS_ERR(dom))
 960                 return PTR_ERR(dom);
 961
 962         ret = __scmi_perf_level_get(ph, dom, &level, poll);
 963         if (ret)
 964                 return ret;
 965
 966         if (!dom->level_indexing_mode) {
 967                 *freq = level * dom->mult_factor;
 968         } else {
 969                 struct scmi_opp *opp;
 970
 971                 opp = xa_load(&dom->opps_by_idx, level);
 972                 if (!opp)
 973                         return -EIO;
 974
 975                 *freq = opp->indicative_freq * dom->mult_factor;
 976         }
 977
 978         return ret;
 979 }
 980
 981 static int scmi_dvfs_est_power_get(const struct scmi_protocol_handle *ph,
 982                                    u32 domain, unsigned long *freq,
 983                                    unsigned long *power)
 984 {
 985         struct perf_dom_info *dom;
 986         unsigned long opp_freq;
 987         int idx, ret = -EINVAL;
 988         struct scmi_opp *opp;
 989
 990         dom = scmi_perf_domain_lookup(ph, domain);
 991         if (IS_ERR(dom))
 992                 return PTR_ERR(dom);
 993
 994         for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) {
 995                 if (!dom->level_indexing_mode)
 996                         opp_freq = opp->perf * dom->mult_factor;
 997                 else
 998                         opp_freq = opp->indicative_freq * dom->mult_factor;
 999
1000                 if (opp_freq < *freq)
1001                         continue;
1002
1003                 *freq = opp_freq;
1004                 *power = opp->power;
1005                 ret = 0;
1006                 break;
1007         }
1008
1009         return ret;
1010 }
1011
1012 static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph,
1013                                       u32 domain)
1014 {
1015         struct perf_dom_info *dom;
1016
1017         dom = scmi_perf_domain_lookup(ph, domain);
1018         if (IS_ERR(dom))
1019                 return false;
1020
1021         return dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr;
1022 }
1023
1024 static int scmi_fast_switch_rate_limit(const struct scmi_protocol_handle *ph,
1025                                        u32 domain, u32 *rate_limit)
1026 {
1027         struct perf_dom_info *dom;
1028
1029         if (!rate_limit)
1030                 return -EINVAL;
1031
1032         dom = scmi_perf_domain_lookup(ph, domain);
1033         if (IS_ERR(dom))
1034                 return PTR_ERR(dom);
1035
1036         if (!dom->fc_info)
1037                 return -EINVAL;
1038
1039         *rate_limit = dom->fc_info[PERF_FC_LEVEL].rate_limit;
1040         return 0;
1041 }
1042
1043 static enum scmi_power_scale
1044 scmi_power_scale_get(const struct scmi_protocol_handle *ph)
1045 {
1046         struct scmi_perf_info *pi = ph->get_priv(ph);
1047
1048         return pi->power_scale;
1049 }
1050
1051 static const struct scmi_perf_proto_ops perf_proto_ops = {
1052         .num_domains_get = scmi_perf_num_domains_get,
1053         .info_get = scmi_perf_info_get,
1054         .limits_set = scmi_perf_limits_set,
1055         .limits_get = scmi_perf_limits_get,
1056         .level_set = scmi_perf_level_set,
1057         .level_get = scmi_perf_level_get,
1058         .transition_latency_get = scmi_dvfs_transition_latency_get,
1059         .rate_limit_get = scmi_dvfs_rate_limit_get,
1060         .device_opps_add = scmi_dvfs_device_opps_add,
1061         .freq_set = scmi_dvfs_freq_set,
1062         .freq_get = scmi_dvfs_freq_get,
1063         .est_power_get = scmi_dvfs_est_power_get,
1064         .fast_switch_possible = scmi_fast_switch_possible,
1065         .fast_switch_rate_limit = scmi_fast_switch_rate_limit,
1066         .power_scale_get = scmi_power_scale_get,
1067 };
1068
1069 static bool scmi_perf_notify_supported(const struct scmi_protocol_handle *ph,
1070                                        u8 evt_id, u32 src_id)
1071 {
1072         bool supported;
1073         struct perf_dom_info *dom;
1074
1075         if (evt_id >= ARRAY_SIZE(evt_2_cmd))
1076                 return false;
1077
1078         dom = scmi_perf_domain_lookup(ph, src_id);
1079         if (IS_ERR(dom))
1080                 return false;
1081
1082         if (evt_id == SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED)
1083                 supported = dom->perf_limit_notify;
1084         else
1085                 supported = dom->perf_level_notify;
1086
1087         return supported;
1088 }
1089
1090 static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph,
1091                                         u8 evt_id, u32 src_id, bool enable)
1092 {
1093         int ret, cmd_id;
1094
1095         if (evt_id >= ARRAY_SIZE(evt_2_cmd))
1096                 return -EINVAL;
1097
1098         cmd_id = evt_2_cmd[evt_id];
1099         ret = scmi_perf_level_limits_notify(ph, src_id, cmd_id, enable);
1100         if (ret)
1101                 pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n",
1102                          evt_id, src_id, ret);
1103
1104         return ret;
1105 }
1106
1107 static int
1108 scmi_perf_xlate_opp_to_freq(struct perf_dom_info *dom,
1109                             unsigned int index, unsigned long *freq)
1110 {
1111         struct scmi_opp *opp;
1112
1113         if (!dom || !freq)
1114                 return -EINVAL;
1115
1116         if (!dom->level_indexing_mode) {
1117                 opp = xa_load(&dom->opps_by_lvl, index);
1118                 if (!opp)
1119                         return -ENODEV;
1120
1121                 *freq = opp->perf * dom->mult_factor;
1122         } else {
1123                 opp = xa_load(&dom->opps_by_idx, index);
1124                 if (!opp)
1125                         return -ENODEV;
1126
1127                 *freq = opp->indicative_freq * dom->mult_factor;
1128         }
1129
1130         return 0;
1131 }
1132
1133 static void *scmi_perf_fill_custom_report(const struct scmi_protocol_handle *ph,
1134                                           u8 evt_id, ktime_t timestamp,
1135                                           const void *payld, size_t payld_sz,
1136                                           void *report, u32 *src_id)
1137 {
1138         int ret;
1139         void *rep = NULL;
1140         struct perf_dom_info *dom;
1141
1142         switch (evt_id) {
1143         case SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED:
1144         {
1145                 const struct scmi_perf_limits_notify_payld *p = payld;
1146                 struct scmi_perf_limits_report *r = report;
1147                 unsigned long freq_min, freq_max;
1148
1149                 if (sizeof(*p) != payld_sz)
1150                         break;
1151
1152                 r->timestamp = timestamp;
1153                 r->agent_id = le32_to_cpu(p->agent_id);
1154                 r->domain_id = le32_to_cpu(p->domain_id);
1155                 r->range_max = le32_to_cpu(p->range_max);
1156                 r->range_min = le32_to_cpu(p->range_min);
1157                 /* Check if the reported domain exist at all */
1158                 dom = scmi_perf_domain_lookup(ph, r->domain_id);
1159                 if (IS_ERR(dom))
1160                         break;
1161                 /*
1162                  * Event will be reported from this point on...
1163                  * ...even if, later, xlated frequencies were not retrieved.
1164                  */
1165                 *src_id = r->domain_id;
1166                 rep = r;
1167
1168                 ret = scmi_perf_xlate_opp_to_freq(dom, r->range_max, &freq_max);
1169                 if (ret)
1170                         break;
1171
1172                 ret = scmi_perf_xlate_opp_to_freq(dom, r->range_min, &freq_min);
1173                 if (ret)
1174                         break;
1175
1176                 /* Report translated freqs ONLY if both available */
1177                 r->range_max_freq = freq_max;
1178                 r->range_min_freq = freq_min;
1179
1180                 break;
1181         }
1182         case SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED:
1183         {
1184                 const struct scmi_perf_level_notify_payld *p = payld;
1185                 struct scmi_perf_level_report *r = report;
1186                 unsigned long freq;
1187
1188                 if (sizeof(*p) != payld_sz)
1189                         break;
1190
1191                 r->timestamp = timestamp;
1192                 r->agent_id = le32_to_cpu(p->agent_id);
1193                 r->domain_id = le32_to_cpu(p->domain_id);
1194                 /* Report translated freqs ONLY if available */
1195                 r->performance_level = le32_to_cpu(p->performance_level);
1196                 /* Check if the reported domain exist at all */
1197                 dom = scmi_perf_domain_lookup(ph, r->domain_id);
1198                 if (IS_ERR(dom))
1199                         break;
1200                 /*
1201                  * Event will be reported from this point on...
1202                  * ...even if, later, xlated frequencies were not retrieved.
1203                  */
1204                 *src_id = r->domain_id;
1205                 rep = r;
1206
1207                 /* Report translated freqs ONLY if available */
1208                 ret = scmi_perf_xlate_opp_to_freq(dom, r->performance_level,
1209                                                   &freq);
1210                 if (ret)
1211                         break;
1212
1213                 r->performance_level_freq = freq;
1214
1215                 break;
1216         }
1217         default:
1218                 break;
1219         }
1220
1221         return rep;
1222 }
1223
1224 static int scmi_perf_get_num_sources(const struct scmi_protocol_handle *ph)
1225 {
1226         struct scmi_perf_info *pi = ph->get_priv(ph);
1227
1228         if (!pi)
1229                 return -EINVAL;
1230
1231         return pi->num_domains;
1232 }
1233
1234 static const struct scmi_event perf_events[] = {
1235         {
1236                 .id = SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED,
1237                 .max_payld_sz = sizeof(struct scmi_perf_limits_notify_payld),
1238                 .max_report_sz = sizeof(struct scmi_perf_limits_report),
1239         },
1240         {
1241                 .id = SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED,
1242                 .max_payld_sz = sizeof(struct scmi_perf_level_notify_payld),
1243                 .max_report_sz = sizeof(struct scmi_perf_level_report),
1244         },
1245 };
1246
1247 static const struct scmi_event_ops perf_event_ops = {
1248         .is_notify_supported = scmi_perf_notify_supported,
1249         .get_num_sources = scmi_perf_get_num_sources,
1250         .set_notify_enabled = scmi_perf_set_notify_enabled,
1251         .fill_custom_report = scmi_perf_fill_custom_report,
1252 };
1253
1254 static const struct scmi_protocol_events perf_protocol_events = {
1255         .queue_sz = SCMI_PROTO_QUEUE_SZ,
1256         .ops = &perf_event_ops,
1257         .evts = perf_events,
1258         .num_events = ARRAY_SIZE(perf_events),
1259 };
1260
1261 static int scmi_perf_protocol_init(const struct scmi_protocol_handle *ph)
1262 {
1263         int domain, ret;
1264         u32 version;
1265         struct scmi_perf_info *pinfo;
1266
1267         ret = ph->xops->version_get(ph, &version);
1268         if (ret)
1269                 return ret;
1270
1271         dev_dbg(ph->dev, "Performance Version %d.%d\n",
1272                 PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version));
1273
1274         pinfo = devm_kzalloc(ph->dev, sizeof(*pinfo), GFP_KERNEL);
1275         if (!pinfo)
1276                 return -ENOMEM;
1277
1278         pinfo->version = version;
1279
1280         ret = scmi_perf_attributes_get(ph, pinfo);
1281         if (ret)
1282                 return ret;
1283
1284         pinfo->dom_info = devm_kcalloc(ph->dev, pinfo->num_domains,
1285                                        sizeof(*pinfo->dom_info), GFP_KERNEL);
1286         if (!pinfo->dom_info)
1287                 return -ENOMEM;
1288
1289         for (domain = 0; domain < pinfo->num_domains; domain++) {
1290                 struct perf_dom_info *dom = pinfo->dom_info + domain;
1291
1292                 dom->id = domain;
1293                 scmi_perf_domain_attributes_get(ph, dom, pinfo->notify_lim_cmd,
1294                                                 pinfo->notify_lvl_cmd, version);
1295                 scmi_perf_describe_levels_get(ph, dom, version);
1296
1297                 if (dom->perf_fastchannels)
1298                         scmi_perf_domain_init_fc(ph, dom);
1299         }
1300
1301         ret = devm_add_action_or_reset(ph->dev, scmi_perf_xa_destroy, pinfo);
1302         if (ret)
1303                 return ret;
1304
1305         return ph->set_priv(ph, pinfo, version);
1306 }
1307
1308 static const struct scmi_protocol scmi_perf = {
1309         .id = SCMI_PROTOCOL_PERF,
1310         .owner = THIS_MODULE,
1311         .instance_init = &scmi_perf_protocol_init,
1312         .ops = &perf_proto_ops,
1313         .events = &perf_protocol_events,
1314         .supported_version = SCMI_PROTOCOL_SUPPORTED_VERSION,
1315 };
1316
1317 DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(perf, scmi_perf)