linux-kernel - [PATCH v3 7/9] firmware: arm_scmi: Use FastChannel tracing

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Date:   Mon, 27 Jun 2022 13:30:36 +0100
From:   Cristian Marussi <cristian.marussi@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     sudeep.holla@....com, james.quinlan@...adcom.com,
        Jonathan.Cameron@...wei.com, f.fainelli@...il.com,
        etienne.carriere@...aro.org, vincent.guittot@...aro.org,
        daniel.lezcano@...aro.org, tarek.el-sherbiny@....com,
        adrian.slatineanu@....com, souvik.chakravarty@....com,
        wleavitt@...vell.com, wbartczak@...vell.com,
        Cristian Marussi <cristian.marussi@....com>
Subject: [PATCH v3 7/9] firmware: arm_scmi: Use FastChannel tracing

Make use of SCMI FastChannel event tracing.

Signed-off-by: Cristian Marussi <cristian.marussi@....com>
---
 drivers/firmware/arm_scmi/perf.c     | 10 ++++++++++
 drivers/firmware/arm_scmi/powercap.c | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index 521458fda355..64ea2d2f2875 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -16,6 +16,8 @@
 #include <linux/scmi_protocol.h>
 #include <linux/sort.h>
 
+#include <trace/events/scmi.h>
+
 #include "protocols.h"
 #include "notify.h"
 
@@ -363,6 +365,8 @@ static int scmi_perf_limits_set(const struct scmi_protocol_handle *ph,
 	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);
@@ -409,6 +413,8 @@ static int scmi_perf_limits_get(const struct scmi_protocol_handle *ph,
 
 		*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;
 	}
 
@@ -446,6 +452,8 @@ static int scmi_perf_level_set(const struct scmi_protocol_handle *ph,
 	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;
@@ -484,6 +492,8 @@ static int scmi_perf_level_get(const struct scmi_protocol_handle *ph,
 
 	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;
 	}
 
diff --git a/drivers/firmware/arm_scmi/powercap.c b/drivers/firmware/arm_scmi/powercap.c
index ed61df6a68c4..7bd6fab35650 100644
--- a/drivers/firmware/arm_scmi/powercap.c
+++ b/drivers/firmware/arm_scmi/powercap.c
@@ -12,6 +12,8 @@
 #include <linux/module.h>
 #include <linux/scmi_protocol.h>
 
+#include <trace/events/scmi.h>
+
 #include "protocols.h"
 #include "notify.h"
 
@@ -323,6 +325,8 @@ static int scmi_powercap_cap_get(const struct scmi_protocol_handle *ph,
 	dom = pi->powercaps + domain_id;
 	if (dom->fc_info && dom->fc_info[POWERCAP_FC_CAP].get_addr) {
 		*power_cap = ioread32(dom->fc_info[POWERCAP_FC_CAP].get_addr);
+		trace_scmi_fc_call(SCMI_PROTOCOL_POWERCAP, POWERCAP_CAP_GET,
+				   domain_id, *power_cap, 0);
 		return 0;
 	}
 
@@ -388,6 +392,8 @@ static int scmi_powercap_cap_set(const struct scmi_protocol_handle *ph,
 
 		iowrite32(power_cap, fci->set_addr);
 		ph->hops->fastchannel_db_ring(fci->set_db);
+		trace_scmi_fc_call(SCMI_PROTOCOL_POWERCAP, POWERCAP_CAP_SET,
+				   domain_id, power_cap, 0);
 		return 0;
 	}
 
@@ -427,6 +433,8 @@ static int scmi_powercap_pai_get(const struct scmi_protocol_handle *ph,
 	dom = pi->powercaps + domain_id;
 	if (dom->fc_info && dom->fc_info[POWERCAP_FC_PAI].get_addr) {
 		*pai = ioread32(dom->fc_info[POWERCAP_FC_PAI].get_addr);
+		trace_scmi_fc_call(SCMI_PROTOCOL_POWERCAP, POWERCAP_PAI_GET,
+				   domain_id, *pai, 0);
 		return 0;
 	}
 
@@ -469,6 +477,8 @@ static int scmi_powercap_pai_set(const struct scmi_protocol_handle *ph,
 	if (pc->fc_info && pc->fc_info[POWERCAP_FC_PAI].set_addr) {
 		struct scmi_fc_info *fci = &pc->fc_info[POWERCAP_FC_PAI];
 
+		trace_scmi_fc_call(SCMI_PROTOCOL_POWERCAP, POWERCAP_PAI_SET,
+				   domain_id, pai, 0);
 		iowrite32(pai, fci->set_addr);
 		ph->hops->fastchannel_db_ring(fci->set_db);
 		return 0;
-- 
2.32.0