Add a preliminary check to verify if Perf-related notify enable commands
are supported at all by the running platform, and then provide the callback
needed to allow the core SCMI notification subsytem to fine-grain check if
a specific resource domain supports notifications.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
drivers/firmware/arm_scmi/perf.c | 45 +++++++++++++++++++++++++++++---
1 file changed, 42 insertions(+), 3 deletions(-)
@@ -182,6 +182,8 @@ struct scmi_perf_info {
enum scmi_power_scale power_scale;
u64 stats_addr;
u32 stats_size;
+ bool notify_lvl_cmd;
+ bool notify_lim_cmd;
struct perf_dom_info *dom_info;
};
@@ -222,6 +224,15 @@ static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph,
}
ph->xops->xfer_put(ph, t);
+
+ if (!ret) {
+ if (!ph->hops->protocol_msg_check(ph, PERF_NOTIFY_LEVEL, NULL))
+ pi->notify_lvl_cmd = true;
+
+ if (!ph->hops->protocol_msg_check(ph, PERF_NOTIFY_LIMITS, NULL))
+ pi->notify_lim_cmd = true;
+ }
+
return ret;
}
@@ -239,6 +250,7 @@ static void scmi_perf_xa_destroy(void *data)
static int
scmi_perf_domain_attributes_get(const struct scmi_protocol_handle *ph,
struct perf_dom_info *dom_info,
+ bool notify_lim_cmd, bool notify_lvl_cmd,
u32 version)
{
int ret;
@@ -260,8 +272,12 @@ scmi_perf_domain_attributes_get(const struct scmi_protocol_handle *ph,
dom_info->set_limits = SUPPORTS_SET_LIMITS(flags);
dom_info->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);
+ if (notify_lim_cmd)
+ dom_info->perf_limit_notify =
+ SUPPORTS_PERF_LIMIT_NOTIFY(flags);
+ if (notify_lvl_cmd)
+ dom_info->perf_level_notify =
+ SUPPORTS_PERF_LEVEL_NOTIFY(flags);
dom_info->perf_fastchannels = SUPPORTS_PERF_FASTCHANNELS(flags);
if (PROTOCOL_REV_MAJOR(version) >= 0x4)
dom_info->level_indexing_mode =
@@ -993,6 +1009,27 @@ static const struct scmi_perf_proto_ops perf_proto_ops = {
.power_scale_get = scmi_power_scale_get,
};
+static bool scmi_perf_notify_supported(const struct scmi_protocol_handle *ph,
+ u8 evt_id, u32 src_id)
+{
+ bool supported;
+ struct perf_dom_info *dom;
+
+ if (evt_id >= ARRAY_SIZE(evt_2_cmd))
+ return false;
+
+ dom = scmi_perf_domain_lookup(ph, src_id);
+ if (IS_ERR(dom))
+ return false;
+
+ if (evt_id == SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED)
+ supported = dom->perf_limit_notify;
+ else
+ supported = dom->perf_level_notify;
+
+ return supported;
+}
+
static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph,
u8 evt_id, u32 src_id, bool enable)
{
@@ -1082,6 +1119,7 @@ static const struct scmi_event perf_events[] = {
};
static const struct scmi_event_ops perf_event_ops = {
+ .is_notify_supported = scmi_perf_notify_supported,
.get_num_sources = scmi_perf_get_num_sources,
.set_notify_enabled = scmi_perf_set_notify_enabled,
.fill_custom_report = scmi_perf_fill_custom_report,
@@ -1126,7 +1164,8 @@ static int scmi_perf_protocol_init(const struct scmi_protocol_handle *ph)
struct perf_dom_info *dom = pinfo->dom_info + domain;
dom->id = domain;
- scmi_perf_domain_attributes_get(ph, dom, version);
+ scmi_perf_domain_attributes_get(ph, dom, pinfo->notify_lim_cmd,
+ pinfo->notify_lvl_cmd, version);
scmi_perf_describe_levels_get(ph, dom, version);
if (dom->perf_fastchannels)