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Message-ID: <20240212123233.1230090-10-cristian.marussi@arm.com>
Date: Mon, 12 Feb 2024 12:32:31 +0000
From: Cristian Marussi <cristian.marussi@....com>
To: linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Cc: sudeep.holla@....com,
vincent.guittot@...aro.org,
peng.fan@....nxp.com,
michal.simek@....com,
quic_sibis@...cinc.com,
quic_nkela@...cinc.com,
souvik.chakravarty@....com,
Cristian Marussi <cristian.marussi@....com>
Subject: [PATCH 09/11] firmware: arm_scmi: Implement Powercap .is_notify_supported callback
Add a preliminary check to verify if Powercap-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@....com>
---
drivers/firmware/arm_scmi/powercap.c | 45 +++++++++++++++++++++++++---
1 file changed, 41 insertions(+), 4 deletions(-)
diff --git a/drivers/firmware/arm_scmi/powercap.c b/drivers/firmware/arm_scmi/powercap.c
index a4c6cd4716fe..aae91f47303e 100644
--- a/drivers/firmware/arm_scmi/powercap.c
+++ b/drivers/firmware/arm_scmi/powercap.c
@@ -124,6 +124,8 @@ struct scmi_powercap_state {
struct powercap_info {
u32 version;
int num_domains;
+ bool notify_cap_cmd;
+ bool notify_measurements_cmd;
struct scmi_powercap_state *states;
struct scmi_powercap_info *powercaps;
};
@@ -157,6 +159,18 @@ scmi_powercap_attributes_get(const struct scmi_protocol_handle *ph,
}
ph->xops->xfer_put(ph, t);
+
+ if (!ret) {
+ if (!ph->hops->protocol_msg_check(ph,
+ POWERCAP_CAP_NOTIFY, NULL))
+ pi->notify_cap_cmd = true;
+
+ if (!ph->hops->protocol_msg_check(ph,
+ POWERCAP_MEASUREMENTS_NOTIFY,
+ NULL))
+ pi->notify_measurements_cmd = true;
+ }
+
return ret;
}
@@ -200,10 +214,12 @@ scmi_powercap_domain_attributes_get(const struct scmi_protocol_handle *ph,
flags = le32_to_cpu(resp->attributes);
dom_info->id = domain;
- dom_info->notify_powercap_cap_change =
- SUPPORTS_POWERCAP_CAP_CHANGE_NOTIFY(flags);
- dom_info->notify_powercap_measurement_change =
- SUPPORTS_POWERCAP_MEASUREMENTS_CHANGE_NOTIFY(flags);
+ if (pinfo->notify_cap_cmd)
+ dom_info->notify_powercap_cap_change =
+ SUPPORTS_POWERCAP_CAP_CHANGE_NOTIFY(flags);
+ if (pinfo->notify_measurements_cmd)
+ dom_info->notify_powercap_measurement_change =
+ SUPPORTS_POWERCAP_MEASUREMENTS_CHANGE_NOTIFY(flags);
dom_info->async_powercap_cap_set =
SUPPORTS_ASYNC_POWERCAP_CAP_SET(flags);
dom_info->powercap_cap_config =
@@ -788,6 +804,26 @@ static int scmi_powercap_notify(const struct scmi_protocol_handle *ph,
return ret;
}
+static bool
+scmi_powercap_notify_supported(const struct scmi_protocol_handle *ph,
+ u8 evt_id, u32 src_id)
+{
+ bool supported;
+ const struct scmi_powercap_info *dom_info;
+ struct powercap_info *pi = ph->get_priv(ph);
+
+ if (evt_id >= ARRAY_SIZE(evt_2_cmd) || src_id >= pi->num_domains)
+ return false;
+
+ dom_info = pi->powercaps + src_id;
+ if (evt_id == SCMI_EVENT_POWERCAP_CAP_CHANGED)
+ supported = dom_info->notify_powercap_cap_change;
+ else if (evt_id == SCMI_EVENT_POWERCAP_MEASUREMENTS_CHANGED)
+ supported = dom_info->notify_powercap_measurement_change;
+
+ return supported;
+}
+
static int
scmi_powercap_set_notify_enabled(const struct scmi_protocol_handle *ph,
u8 evt_id, u32 src_id, bool enable)
@@ -904,6 +940,7 @@ static const struct scmi_event powercap_events[] = {
};
static const struct scmi_event_ops powercap_event_ops = {
+ .is_notify_supported = scmi_powercap_notify_supported,
.get_num_sources = scmi_powercap_get_num_sources,
.set_notify_enabled = scmi_powercap_set_notify_enabled,
.fill_custom_report = scmi_powercap_fill_custom_report,
--
2.43.0
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