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Commit 2a3dfb21 authored by Ram Chandrasekar's avatar Ram Chandrasekar Committed by Ram Chandrasekar
Browse files

thermal: lmh-dcvsh: Notify and trace the hardware frequency limit 



Enable the LMH-DCVSh feature to listen for hardware freqeuncy request
interrupt. LMH-DCVSh driver will listen for interrupt from the LMH-DCVSh
hardware, which is sent when there is a new frequency request to OSM.
LMH-DCVSh will read the new frequency request, notify the scheduler, print
trace event and then poll for the subsequent frequency request till there
is no request.

Change-Id: I80b7bbdb82a1d42b21b40bf997edf5e73ec9ea8c
Signed-off-by: default avatarRam Chandrasekar <rkumbako@codeaurora.org>
parent 0e6032e3

drivers/thermal/qcom/msm_lmh_dcvs.c

+14 −4
Original line number Diff line number Diff line
@@ -34,6 +34,9 @@ 


#include "../thermal_core.h"



#define CREATE_TRACE_POINTS

#include <trace/events/lmh.h>



#define LIMITS_DCVSH                0x10

#define LIMITS_PROFILE_CHANGE       0x01

#define LIMITS_NODE_DCVS            0x44435653
@@ -60,10 +63,10 @@ 
#define LIMITS_TEMP_HIGH_THRESH_MAX 120000

#define LIMITS_LOW_THRESHOLD_OFFSET 500

#define LIMITS_POLLING_DELAY_MS     10

#define LIMITS_CLUSTER_0_REQ        0x179C1B04

#define LIMITS_CLUSTER_1_REQ        0x179C3B04

#define LIMITS_CLUSTER_0_INT_CLR    0x179CE808

#define LIMITS_CLUSTER_1_INT_CLR    0x179CC808

#define LIMITS_CLUSTER_0_REQ        0x17D43704

#define LIMITS_CLUSTER_1_REQ        0x17D45F04

#define LIMITS_CLUSTER_0_INT_CLR    0x17D78808

#define LIMITS_CLUSTER_1_INT_CLR    0x17D70808

#define LIMITS_CLUSTER_0_MIN_FREQ   0x17D78BC0

#define LIMITS_CLUSTER_1_MIN_FREQ   0x17D70BC0

#define dcvsh_get_frequency(_val, _max) do { \
@@ -146,6 +149,9 @@ static unsigned long limits_mitigation_notify(struct limits_dcvs_hw *hw) 
		goto notify_exit;

	}



	pr_debug("CPU:%d max value read:%lu\n",

			cpumask_first(&hw->core_map),

			max_limit);

	freq_val = FREQ_KHZ_TO_HZ(max_limit);

	rcu_read_lock();

	opp_entry = dev_pm_opp_find_freq_floor(cpu_dev, &freq_val);
@@ -165,6 +171,9 @@ static unsigned long limits_mitigation_notify(struct limits_dcvs_hw *hw) 
	max_limit = FREQ_HZ_TO_KHZ(freq_val);



	sched_update_cpu_freq_min_max(&hw->core_map, 0, max_limit);

	pr_debug("CPU:%d max limit:%lu\n", cpumask_first(&hw->core_map),

			max_limit);

	trace_lmh_dcvs_freq(cpumask_first(&hw->core_map), max_limit);



notify_exit:

	hw->hw_freq_limit = max_limit;
@@ -344,6 +353,7 @@ static int lmh_set_max_limit(int cpu, u32 freq) 
	ret = limits_dcvs_write(hw->affinity, LIMITS_SUB_FN_GENERAL,

				  LIMITS_DOMAIN_MAX, max_freq);

	mutex_unlock(&hw->access_lock);

	lmh_dcvs_notify(hw);



	return ret;

}

include/trace/events/lmh.h

0 → 100644
+41 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2017 The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#undef TRACE_SYSTEM

#define TRACE_SYSTEM lmh



#if !defined(_TRACE_LMH_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_LMH_H



#include <linux/tracepoint.h>



TRACE_EVENT(lmh_dcvs_freq,

	TP_PROTO(unsigned long cpu, unsigned long freq),



	TP_ARGS(cpu, freq),



	TP_STRUCT__entry(

		__field(unsigned long, cpu)

		__field(unsigned long, freq)

	),



	TP_fast_assign(

		__entry->cpu = cpu;

		__entry->freq = freq;

	),



	TP_printk("cpu:%lu max frequency:%lu", __entry->cpu, __entry->freq)

);

#endif /* _TRACE_LMH_H */



/* This part must be outside protection */

#include <trace/define_trace.h>