diff options
Diffstat (limited to 'drivers/firmware/arm_scmi/perf.c')
| -rw-r--r-- | drivers/firmware/arm_scmi/perf.c | 151 |
1 files changed, 146 insertions, 5 deletions
diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index eadc171e254b..3e1e87012c95 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -5,15 +5,19 @@ * Copyright (C) 2018 ARM Ltd. */ +#define pr_fmt(fmt) "SCMI Notifications PERF - " fmt + #include <linux/bits.h> #include <linux/of.h> #include <linux/io.h> #include <linux/io-64-nonatomic-hi-lo.h> #include <linux/platform_device.h> #include <linux/pm_opp.h> +#include <linux/scmi_protocol.h> #include <linux/sort.h> #include "common.h" +#include "notify.h" enum scmi_performance_protocol_cmd { PERF_DOMAIN_ATTRIBUTES = 0x3, @@ -27,11 +31,6 @@ enum scmi_performance_protocol_cmd { PERF_DESCRIBE_FASTCHANNEL = 0xb, }; -enum scmi_performance_protocol_notify { - PERFORMANCE_LIMITS_CHANGED = 0x0, - PERFORMANCE_LEVEL_CHANGED = 0x1, -}; - struct scmi_opp { u32 perf; u32 power; @@ -86,6 +85,19 @@ struct scmi_perf_notify_level_or_limits { __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; @@ -158,6 +170,11 @@ struct scmi_perf_info { 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_handle *handle, struct scmi_perf_info *pi) { @@ -488,6 +505,29 @@ static int scmi_perf_level_get(const struct scmi_handle *handle, u32 domain, return scmi_perf_mb_level_get(handle, domain, level, poll); } +static int scmi_perf_level_limits_notify(const struct scmi_handle *handle, + u32 domain, int message_id, + bool enable) +{ + int ret; + struct scmi_xfer *t; + struct scmi_perf_notify_level_or_limits *notify; + + ret = scmi_xfer_get_init(handle, message_id, SCMI_PROTOCOL_PERF, + 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 = scmi_do_xfer(handle, t); + + scmi_xfer_put(handle, t); + return ret; +} + static bool scmi_perf_fc_size_is_valid(u32 msg, u32 size) { if ((msg == PERF_LEVEL_GET || msg == PERF_LEVEL_SET) && size == 4) @@ -697,6 +737,17 @@ static int scmi_dvfs_est_power_get(const struct scmi_handle *handle, u32 domain, return ret; } +static bool scmi_fast_switch_possible(const struct scmi_handle *handle, + struct device *dev) +{ + struct perf_dom_info *dom; + struct scmi_perf_info *pi = handle->perf_priv; + + dom = pi->dom_info + scmi_dev_domain_id(dev); + + return dom->fc_info && dom->fc_info->level_set_addr; +} + static struct scmi_perf_ops perf_ops = { .limits_set = scmi_perf_limits_set, .limits_get = scmi_perf_limits_get, @@ -708,6 +759,90 @@ static struct scmi_perf_ops perf_ops = { .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, +}; + +static int scmi_perf_set_notify_enabled(const struct scmi_handle *handle, + 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(handle, 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_handle *handle, + 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 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 = { + .set_notify_enabled = scmi_perf_set_notify_enabled, + .fill_custom_report = scmi_perf_fill_custom_report, }; static int scmi_perf_protocol_init(struct scmi_handle *handle) @@ -742,6 +877,12 @@ static int scmi_perf_protocol_init(struct scmi_handle *handle) scmi_perf_domain_init_fc(handle, domain, &dom->fc_info); } + scmi_register_protocol_events(handle, + SCMI_PROTOCOL_PERF, SCMI_PROTO_QUEUE_SZ, + &perf_event_ops, perf_events, + ARRAY_SIZE(perf_events), + pinfo->num_domains); + pinfo->version = version; handle->perf_ops = &perf_ops; handle->perf_priv = pinfo; |