// SPDX-License-Identifier: GPL-2.0 /* * System Control and Management Interface (SCMI) Performance Protocol * * Copyright (C) 2018-2022 ARM Ltd. */ #define pr_fmt(fmt) "SCMI Notifications PERF - " fmt #include #include #include #include #include #include #include #include #include #include "protocols.h" #include "notify.h" #define MAX_OPPS 16 enum scmi_performance_protocol_cmd { PERF_DOMAIN_ATTRIBUTES = 0x3, PERF_DESCRIBE_LEVELS = 0x4, PERF_LIMITS_SET = 0x5, PERF_LIMITS_GET = 0x6, PERF_LEVEL_SET = 0x7, PERF_LEVEL_GET = 0x8, PERF_NOTIFY_LIMITS = 0x9, PERF_NOTIFY_LEVEL = 0xa, PERF_DESCRIBE_FASTCHANNEL = 0xb, PERF_DOMAIN_NAME_GET = 0xc, }; enum { PERF_FC_LEVEL, PERF_FC_LIMIT, PERF_FC_MAX, }; struct scmi_opp { u32 perf; u32 power; u32 trans_latency_us; }; struct scmi_msg_resp_perf_attributes { __le16 num_domains; __le16 flags; #define POWER_SCALE_IN_MILLIWATT(x) ((x) & BIT(0)) #define POWER_SCALE_IN_MICROWATT(x) ((x) & BIT(1)) __le32 stats_addr_low; __le32 stats_addr_high; __le32 stats_size; }; struct scmi_msg_resp_perf_domain_attributes { __le32 flags; #define SUPPORTS_SET_LIMITS(x) ((x) & BIT(31)) #define SUPPORTS_SET_PERF_LVL(x) ((x) & BIT(30)) #define SUPPORTS_PERF_LIMIT_NOTIFY(x) ((x) & BIT(29)) #define SUPPORTS_PERF_LEVEL_NOTIFY(x) ((x) & BIT(28)) #define SUPPORTS_PERF_FASTCHANNELS(x) ((x) & BIT(27)) #define SUPPORTS_EXTENDED_NAMES(x) ((x) & BIT(26)) __le32 rate_limit_us; __le32 sustained_freq_khz; __le32 sustained_perf_level; u8 name[SCMI_SHORT_NAME_MAX_SIZE]; }; struct scmi_msg_perf_describe_levels { __le32 domain; __le32 level_index; }; struct scmi_perf_set_limits { __le32 domain; __le32 max_level; __le32 min_level; }; struct scmi_perf_get_limits { __le32 max_level; __le32 min_level; }; struct scmi_perf_set_level { __le32 domain; __le32 level; }; struct scmi_perf_notify_level_or_limits { __le32 domain; __le32 notify_enable; }; struct scmi_perf_limits_notify_payld { __le32 agent_id; __le32 domain_id; __le32 range_max; __le32 range_min; }; struct scmi_perf_level_notify_payld { __le32 agent_id; __le32 domain_id; __le32 performance_level; }; struct scmi_msg_resp_perf_describe_levels { __le16 num_returned; __le16 num_remaining; struct { __le32 perf_val; __le32 power; __le16 transition_latency_us; __le16 reserved; } opp[]; }; struct perf_dom_info { bool set_limits; bool set_perf; bool perf_limit_notify; bool perf_level_notify; bool perf_fastchannels; u32 opp_count; u32 sustained_freq_khz; u32 sustained_perf_level; unsigned long mult_factor; char name[SCMI_MAX_STR_SIZE]; struct scmi_opp opp[MAX_OPPS]; struct scmi_fc_info *fc_info; }; struct scmi_perf_info { u32 version; u16 num_domains; enum scmi_power_scale power_scale; u64 stats_addr; u32 stats_size; struct perf_dom_info *dom_info; }; static enum scmi_performance_protocol_cmd evt_2_cmd[] = { PERF_NOTIFY_LIMITS, PERF_NOTIFY_LEVEL, }; static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph, struct scmi_perf_info *pi) { int ret; struct scmi_xfer *t; struct scmi_msg_resp_perf_attributes *attr; ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0, sizeof(*attr), &t); if (ret) return ret; attr = t->rx.buf; ret = ph->xops->do_xfer(ph, t); if (!ret) { u16 flags = le16_to_cpu(attr->flags); pi->num_domains = le16_to_cpu(attr->num_domains); if (POWER_SCALE_IN_MILLIWATT(flags)) pi->power_scale = SCMI_POWER_MILLIWATTS; if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3) if (POWER_SCALE_IN_MICROWATT(flags)) pi->power_scale = SCMI_POWER_MICROWATTS; pi->stats_addr = le32_to_cpu(attr->stats_addr_low) | (u64)le32_to_cpu(attr->stats_addr_high) << 32; pi->stats_size = le32_to_cpu(attr->stats_size); } ph->xops->xfer_put(ph, t); return ret; } static int scmi_perf_domain_attributes_get(const struct scmi_protocol_handle *ph, u32 domain, struct perf_dom_info *dom_info, u32 version) { int ret; u32 flags; struct scmi_xfer *t; struct scmi_msg_resp_perf_domain_attributes *attr; ret = ph->xops->xfer_get_init(ph, PERF_DOMAIN_ATTRIBUTES, sizeof(domain), sizeof(*attr), &t); if (ret) return ret; put_unaligned_le32(domain, t->tx.buf); attr = t->rx.buf; ret = ph->xops->do_xfer(ph, t); if (!ret) { flags = le32_to_cpu(attr->flags); dom_info->set_limits = SUPPORTS_SET_LIMITS(flags); dom_info->set_perf = SUPPORTS_SET_PERF_LVL(flags); dom_info->perf_limit_notify = SUPPORTS_PERF_LIMIT_NOTIFY(flags); dom_info->perf_level_notify = SUPPORTS_PERF_LEVEL_NOTIFY(flags); dom_info->perf_fastchannels = SUPPORTS_PERF_FASTCHANNELS(flags); dom_info->sustained_freq_khz = le32_to_cpu(attr->sustained_freq_khz); dom_info->sustained_perf_level = le32_to_cpu(attr->sustained_perf_level); if (!dom_info->sustained_freq_khz || !dom_info->sustained_perf_level) /* CPUFreq converts to kHz, hence default 1000 */ dom_info->mult_factor = 1000; else dom_info->mult_factor = (dom_info->sustained_freq_khz * 1000UL) / dom_info->sustained_perf_level; strscpy(dom_info->name, attr->name, SCMI_SHORT_NAME_MAX_SIZE); } ph->xops->xfer_put(ph, t); /* * If supported overwrite short name with the extended one; * on error just carry on and use already provided short name. */ if (!ret && PROTOCOL_REV_MAJOR(version) >= 0x3 && SUPPORTS_EXTENDED_NAMES(flags)) ph->hops->extended_name_get(ph, PERF_DOMAIN_NAME_GET, domain, dom_info->name, SCMI_MAX_STR_SIZE); return ret; } static int opp_cmp_func(const void *opp1, const void *opp2) { const struct scmi_opp *t1 = opp1, *t2 = opp2; return t1->perf - t2->perf; } struct scmi_perf_ipriv { u32 domain; struct perf_dom_info *perf_dom; }; static void iter_perf_levels_prepare_message(void *message, unsigned int desc_index, const void *priv) { struct scmi_msg_perf_describe_levels *msg = message; const struct scmi_perf_ipriv *p = priv; msg->domain = cpu_to_le32(p->domain); /* Set the number of OPPs to be skipped/already read */ msg->level_index = cpu_to_le32(desc_index); } static int iter_perf_levels_update_state(struct scmi_iterator_state *st, const void *response, void *priv) { const struct scmi_msg_resp_perf_describe_levels *r = response; st->num_returned = le16_to_cpu(r->num_returned); st->num_remaining = le16_to_cpu(r->num_remaining); return 0; } static int iter_perf_levels_process_response(const struct scmi_protocol_handle *ph, const void *response, struct scmi_iterator_state *st, void *priv) { struct scmi_opp *opp; const struct scmi_msg_resp_perf_describe_levels *r = response; struct scmi_perf_ipriv *p = priv; opp = &p->perf_dom->opp[st->desc_index + st->loop_idx]; opp->perf = le32_to_cpu(r->opp[st->loop_idx].perf_val); opp->power = le32_to_cpu(r->opp[st->loop_idx].power); opp->trans_latency_us = le16_to_cpu(r->opp[st->loop_idx].transition_latency_us); p->perf_dom->opp_count++; dev_dbg(ph->dev, "Level %d Power %d Latency %dus\n", opp->perf, opp->power, opp->trans_latency_us); return 0; } static int scmi_perf_describe_levels_get(const struct scmi_protocol_handle *ph, u32 domain, struct perf_dom_info *perf_dom) { int ret; void *iter; struct scmi_iterator_ops ops = { .prepare_message = iter_perf_levels_prepare_message, .update_state = iter_perf_levels_update_state, .process_response = iter_perf_levels_process_response, }; struct scmi_perf_ipriv ppriv = { .domain = domain, .perf_dom = perf_dom, }; iter = ph->hops->iter_response_init(ph, &ops, MAX_OPPS, PERF_DESCRIBE_LEVELS, sizeof(struct scmi_msg_perf_describe_levels), &ppriv); if (IS_ERR(iter)) return PTR_ERR(iter); ret = ph->hops->iter_response_run(iter); if (ret) return ret; if (perf_dom->opp_count) sort(perf_dom->opp, perf_dom->opp_count, sizeof(struct scmi_opp), opp_cmp_func, NULL); return ret; } static int scmi_perf_mb_limits_set(const struct scmi_protocol_handle *ph, u32 domain, u32 max_perf, u32 min_perf) { int ret; struct scmi_xfer *t; struct scmi_perf_set_limits *limits; ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_SET, sizeof(*limits), 0, &t); if (ret) return ret; limits = t->tx.buf; limits->domain = cpu_to_le32(domain); limits->max_level = cpu_to_le32(max_perf); limits->min_level = cpu_to_le32(min_perf); ret = ph->xops->do_xfer(ph, t); ph->xops->xfer_put(ph, t); return ret; } static inline struct perf_dom_info * scmi_perf_domain_lookup(const struct scmi_protocol_handle *ph, u32 domain) { struct scmi_perf_info *pi = ph->get_priv(ph); if (domain >= pi->num_domains) return ERR_PTR(-EINVAL); return pi->dom_info + domain; } static int scmi_perf_limits_set(const struct scmi_protocol_handle *ph, u32 domain, u32 max_perf, u32 min_perf) { struct scmi_perf_info *pi = ph->get_priv(ph); struct perf_dom_info *dom; dom = scmi_perf_domain_lookup(ph, domain); if (IS_ERR(dom)) return PTR_ERR(dom); if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3 && !max_perf && !min_perf) return -EINVAL; if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].set_addr) { struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT]; trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_SET, domain, min_perf, max_perf); iowrite32(max_perf, fci->set_addr); iowrite32(min_perf, fci->set_addr + 4); ph->hops->fastchannel_db_ring(fci->set_db); return 0; } return scmi_perf_mb_limits_set(ph, domain, max_perf, min_perf); } static int scmi_perf_mb_limits_get(const struct scmi_protocol_handle *ph, u32 domain, u32 *max_perf, u32 *min_perf) { int ret; struct scmi_xfer *t; struct scmi_perf_get_limits *limits; ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_GET, sizeof(__le32), 0, &t); if (ret) return ret; put_unaligned_le32(domain, t->tx.buf); ret = ph->xops->do_xfer(ph, t); if (!ret) { limits = t->rx.buf; *max_perf = le32_to_cpu(limits->max_level); *min_perf = le32_to_cpu(limits->min_level); } ph->xops->xfer_put(ph, t); return ret; } static int scmi_perf_limits_get(const struct scmi_protocol_handle *ph, u32 domain, u32 *max_perf, u32 *min_perf) { struct perf_dom_info *dom; dom = scmi_perf_domain_lookup(ph, domain); if (IS_ERR(dom)) return PTR_ERR(dom); if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].get_addr) { struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT]; *max_perf = ioread32(fci->get_addr); *min_perf = ioread32(fci->get_addr + 4); trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_GET, domain, *min_perf, *max_perf); return 0; } return scmi_perf_mb_limits_get(ph, domain, max_perf, min_perf); } static int scmi_perf_mb_level_set(const struct scmi_protocol_handle *ph, u32 domain, u32 level, bool poll) { int ret; struct scmi_xfer *t; struct scmi_perf_set_level *lvl; ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_SET, sizeof(*lvl), 0, &t); if (ret) return ret; t->hdr.poll_completion = poll; lvl = t->tx.buf; lvl->domain = cpu_to_le32(domain); lvl->level = cpu_to_le32(level); ret = ph->xops->do_xfer(ph, t); ph->xops->xfer_put(ph, t); return ret; } static int scmi_perf_level_set(const struct scmi_protocol_handle *ph, u32 domain, u32 level, bool poll) { struct perf_dom_info *dom; dom = scmi_perf_domain_lookup(ph, domain); if (IS_ERR(dom)) return PTR_ERR(dom); if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr) { struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LEVEL]; trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_SET, domain, level, 0); iowrite32(level, fci->set_addr); ph->hops->fastchannel_db_ring(fci->set_db); return 0; } return scmi_perf_mb_level_set(ph, domain, level, poll); } static int scmi_perf_mb_level_get(const struct scmi_protocol_handle *ph, u32 domain, u32 *level, bool poll) { int ret; struct scmi_xfer *t; ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_GET, sizeof(u32), sizeof(u32), &t); if (ret) return ret; t->hdr.poll_completion = poll; put_unaligned_le32(domain, t->tx.buf); ret = ph->xops->do_xfer(ph, t); if (!ret) *level = get_unaligned_le32(t->rx.buf); ph->xops->xfer_put(ph, t); return ret; } static int scmi_perf_level_get(const struct scmi_protocol_handle *ph, u32 domain, u32 *level, bool poll) { struct perf_dom_info *dom; dom = scmi_perf_domain_lookup(ph, domain); if (IS_ERR(dom)) return PTR_ERR(dom); if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].get_addr) { *level = ioread32(dom->fc_info[PERF_FC_LEVEL].get_addr); trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_GET, domain, *level, 0); return 0; } return scmi_perf_mb_level_get(ph, domain, level, poll); } static int scmi_perf_level_limits_notify(const struct scmi_protocol_handle *ph, u32 domain, int message_id, bool enable) { int ret; struct scmi_xfer *t; struct scmi_perf_notify_level_or_limits *notify; ret = ph->xops->xfer_get_init(ph, message_id, sizeof(*notify), 0, &t); if (ret) return ret; notify = t->tx.buf; notify->domain = cpu_to_le32(domain); notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0; ret = ph->xops->do_xfer(ph, t); ph->xops->xfer_put(ph, t); return ret; } static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph, u32 domain, struct scmi_fc_info **p_fc) { struct scmi_fc_info *fc; fc = devm_kcalloc(ph->dev, PERF_FC_MAX, sizeof(*fc), GFP_KERNEL); if (!fc) return; ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, PERF_LEVEL_SET, 4, domain, &fc[PERF_FC_LEVEL].set_addr, &fc[PERF_FC_LEVEL].set_db); ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, PERF_LEVEL_GET, 4, domain, &fc[PERF_FC_LEVEL].get_addr, NULL); ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, PERF_LIMITS_SET, 8, domain, &fc[PERF_FC_LIMIT].set_addr, &fc[PERF_FC_LIMIT].set_db); ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, PERF_LIMITS_GET, 8, domain, &fc[PERF_FC_LIMIT].get_addr, NULL); *p_fc = fc; } /* Device specific ops */ static int scmi_dev_domain_id(struct device *dev) { struct of_phandle_args clkspec; if (of_parse_phandle_with_args(dev->of_node, "clocks", "#clock-cells", 0, &clkspec)) return -EINVAL; return clkspec.args[0]; } static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph, struct device *dev) { int idx, ret, domain; unsigned long freq; struct scmi_opp *opp; struct perf_dom_info *dom; domain = scmi_dev_domain_id(dev); if (domain < 0) return -EINVAL; dom = scmi_perf_domain_lookup(ph, domain); if (IS_ERR(dom)) return PTR_ERR(dom); for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) { freq = opp->perf * dom->mult_factor; ret = dev_pm_opp_add(dev, freq, 0); if (ret) { dev_warn(dev, "failed to add opp %luHz\n", freq); while (idx-- > 0) { freq = (--opp)->perf * dom->mult_factor; dev_pm_opp_remove(dev, freq); } return ret; } } return 0; } static int scmi_dvfs_transition_latency_get(const struct scmi_protocol_handle *ph, struct device *dev) { int domain; struct perf_dom_info *dom; domain = scmi_dev_domain_id(dev); if (domain < 0) return -EINVAL; dom = scmi_perf_domain_lookup(ph, domain); if (IS_ERR(dom)) return PTR_ERR(dom); /* uS to nS */ return dom->opp[dom->opp_count - 1].trans_latency_us * 1000; } static int scmi_dvfs_freq_set(const struct scmi_protocol_handle *ph, u32 domain, unsigned long freq, bool poll) { struct perf_dom_info *dom; dom = scmi_perf_domain_lookup(ph, domain); if (IS_ERR(dom)) return PTR_ERR(dom); return scmi_perf_level_set(ph, domain, freq / dom->mult_factor, poll); } static int scmi_dvfs_freq_get(const struct scmi_protocol_handle *ph, u32 domain, unsigned long *freq, bool poll) { int ret; u32 level; struct scmi_perf_info *pi = ph->get_priv(ph); ret = scmi_perf_level_get(ph, domain, &level, poll); if (!ret) { struct perf_dom_info *dom = pi->dom_info + domain; /* Note domain is validated implicitly by scmi_perf_level_get */ *freq = level * dom->mult_factor; } return ret; } static int scmi_dvfs_est_power_get(const struct scmi_protocol_handle *ph, u32 domain, unsigned long *freq, unsigned long *power) { struct perf_dom_info *dom; unsigned long opp_freq; int idx, ret = -EINVAL; struct scmi_opp *opp; dom = scmi_perf_domain_lookup(ph, domain); if (IS_ERR(dom)) return PTR_ERR(dom); for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) { opp_freq = opp->perf * dom->mult_factor; if (opp_freq < *freq) continue; *freq = opp_freq; *power = opp->power; ret = 0; break; } return ret; } static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph, struct device *dev) { int domain; struct perf_dom_info *dom; domain = scmi_dev_domain_id(dev); if (domain < 0) return false; dom = scmi_perf_domain_lookup(ph, domain); if (IS_ERR(dom)) return false; return dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr; } static enum scmi_power_scale scmi_power_scale_get(const struct scmi_protocol_handle *ph) { struct scmi_perf_info *pi = ph->get_priv(ph); return pi->power_scale; } static const struct scmi_perf_proto_ops perf_proto_ops = { .limits_set = scmi_perf_limits_set, .limits_get = scmi_perf_limits_get, .level_set = scmi_perf_level_set, .level_get = scmi_perf_level_get, .device_domain_id = scmi_dev_domain_id, .transition_latency_get = scmi_dvfs_transition_latency_get, .device_opps_add = scmi_dvfs_device_opps_add, .freq_set = scmi_dvfs_freq_set, .freq_get = scmi_dvfs_freq_get, .est_power_get = scmi_dvfs_est_power_get, .fast_switch_possible = scmi_fast_switch_possible, .power_scale_get = scmi_power_scale_get, }; static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph, u8 evt_id, u32 src_id, bool enable) { int ret, cmd_id; if (evt_id >= ARRAY_SIZE(evt_2_cmd)) return -EINVAL; cmd_id = evt_2_cmd[evt_id]; ret = scmi_perf_level_limits_notify(ph, src_id, cmd_id, enable); if (ret) pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n", evt_id, src_id, ret); return ret; } static void *scmi_perf_fill_custom_report(const struct scmi_protocol_handle *ph, u8 evt_id, ktime_t timestamp, const void *payld, size_t payld_sz, void *report, u32 *src_id) { void *rep = NULL; switch (evt_id) { case SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED: { const struct scmi_perf_limits_notify_payld *p = payld; struct scmi_perf_limits_report *r = report; if (sizeof(*p) != payld_sz) break; r->timestamp = timestamp; r->agent_id = le32_to_cpu(p->agent_id); r->domain_id = le32_to_cpu(p->domain_id); r->range_max = le32_to_cpu(p->range_max); r->range_min = le32_to_cpu(p->range_min); *src_id = r->domain_id; rep = r; break; } case SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED: { const struct scmi_perf_level_notify_payld *p = payld; struct scmi_perf_level_report *r = report; if (sizeof(*p) != payld_sz) break; r->timestamp = timestamp; r->agent_id = le32_to_cpu(p->agent_id); r->domain_id = le32_to_cpu(p->domain_id); r->performance_level = le32_to_cpu(p->performance_level); *src_id = r->domain_id; rep = r; break; } default: break; } return rep; } static int scmi_perf_get_num_sources(const struct scmi_protocol_handle *ph) { struct scmi_perf_info *pi = ph->get_priv(ph); if (!pi) return -EINVAL; return pi->num_domains; } static const struct scmi_event perf_events[] = { { .id = SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED, .max_payld_sz = sizeof(struct scmi_perf_limits_notify_payld), .max_report_sz = sizeof(struct scmi_perf_limits_report), }, { .id = SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED, .max_payld_sz = sizeof(struct scmi_perf_level_notify_payld), .max_report_sz = sizeof(struct scmi_perf_level_report), }, }; static const struct scmi_event_ops perf_event_ops = { .get_num_sources = scmi_perf_get_num_sources, .set_notify_enabled = scmi_perf_set_notify_enabled, .fill_custom_report = scmi_perf_fill_custom_report, }; static const struct scmi_protocol_events perf_protocol_events = { .queue_sz = SCMI_PROTO_QUEUE_SZ, .ops = &perf_event_ops, .evts = perf_events, .num_events = ARRAY_SIZE(perf_events), }; static int scmi_perf_protocol_init(const struct scmi_protocol_handle *ph) { int domain, ret; u32 version; struct scmi_perf_info *pinfo; ret = ph->xops->version_get(ph, &version); if (ret) return ret; dev_dbg(ph->dev, "Performance Version %d.%d\n", PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); pinfo = devm_kzalloc(ph->dev, sizeof(*pinfo), GFP_KERNEL); if (!pinfo) return -ENOMEM; pinfo->version = version; ret = scmi_perf_attributes_get(ph, pinfo); if (ret) return ret; pinfo->dom_info = devm_kcalloc(ph->dev, pinfo->num_domains, sizeof(*pinfo->dom_info), GFP_KERNEL); if (!pinfo->dom_info) return -ENOMEM; for (domain = 0; domain < pinfo->num_domains; domain++) { struct perf_dom_info *dom = pinfo->dom_info + domain; scmi_perf_domain_attributes_get(ph, domain, dom, version); scmi_perf_describe_levels_get(ph, domain, dom); if (dom->perf_fastchannels) scmi_perf_domain_init_fc(ph, domain, &dom->fc_info); } return ph->set_priv(ph, pinfo); } static const struct scmi_protocol scmi_perf = { .id = SCMI_PROTOCOL_PERF, .owner = THIS_MODULE, .instance_init = &scmi_perf_protocol_init, .ops = &perf_proto_ops, .events = &perf_protocol_events, }; DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(perf, scmi_perf)