diff options
Diffstat (limited to 'drivers/firmware/arm_scmi/perf.c')
| -rw-r--r-- | drivers/firmware/arm_scmi/perf.c | 893 |
1 files changed, 893 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c new file mode 100644 index 000000000..2775bcafe --- /dev/null +++ b/drivers/firmware/arm_scmi/perf.c @@ -0,0 +1,893 @@ +// 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 <linux/bits.h> +#include <linux/of.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_opp.h> +#include <linux/scmi_protocol.h> +#include <linux/sort.h> + +#include <trace/events/scmi.h> + +#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) |