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Commit 4f230ed4 authored by Subash Abhinov Kasiviswanathan's avatar Subash Abhinov Kasiviswanathan
Browse files

drivers: rmnet_shs: Freq Boost Feature 



Add option to boost a CPU when switching in order
to avoid OOO packets more effectively.

CRs-Fixed: 2469507
Change-Id: I7166c32a7b5be57d0ec106e24a67cbc1b586f132
Acked-by: default avatarRaul Martinez <mraul@qti.qualcomm.com>
Signed-off-by: default avatarSubash Abhinov Kasiviswanathan <subashab@codeaurora.org>
parent 90c76228

drivers/rmnet/shs/Android.mk

+1 −1
Original line number Diff line number Diff line
@@ -13,7 +13,7 @@ LOCAL_CLANG :=true 
LOCAL_MODULE_PATH := $(KERNEL_MODULES_OUT)

LOCAL_MODULE := rmnet_shs.ko



LOCAL_SRC_FILES := rmnet_shs_main.c rmnet_shs_config.c rmnet_shs_wq.c

LOCAL_SRC_FILES := rmnet_shs_main.c rmnet_shs_config.c rmnet_shs_wq.c rmnet_shs_freq.c



RMNET_SHS_BLD_DIR := ../../vendor/qcom/opensource/data-kernel/drivers/rmnet/shs

DLKM_DIR := ./device/qcom/common/dlkm

drivers/rmnet/shs/Kbuild

+1 −1
Original line number Diff line number Diff line 
obj-m += rmnet_shs.o

rmnet_shs-y := rmnet_shs_config.o rmnet_shs_main.o rmnet_shs_wq.o
 
rmnet_shs-y := rmnet_shs_config.o rmnet_shs_main.o rmnet_shs_wq.o rmnet_shs_freq.o

drivers/rmnet/shs/rmnet_shs.h

+3 −0
Original line number Diff line number Diff line
@@ -19,6 +19,8 @@ 
#ifndef _RMNET_SHS_H_

#define _RMNET_SHS_H_



#include "rmnet_shs_freq.h"



#include <../drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h>

#include <../drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h>

#include <../drivers/net/ethernet/qualcomm/rmnet/rmnet_private.h>
@@ -32,6 +34,7 @@ 
#define RMNET_SHS_MAX_SKB_INACTIVE_TSEC 30

#define MAX_SILVER_CORES 4

#define MAX_CPUS  8

#define PERF_MASK 0xF0



/* RPS mask change's Default core for orphaned CPU flows */

#define MAIN_CORE 0

drivers/rmnet/shs/rmnet_shs_freq.c

0 → 100644
+156 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2019 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.

 *

 * RMNET Data Smart Hash stamping solution

 *

 */

#include <linux/module.h>

#include "rmnet_shs.h"

#include "rmnet_shs_freq.h"



#include <linux/cpufreq.h>

#include <linux/cpu.h>



#define MAX_FREQ INT_MAX

#define MIN_FREQ 0

#define BOOST_FREQ MAX_FREQ



struct cpu_freq {

	unsigned int freq_floor;

	unsigned int freq_ceil;



};



unsigned int rmnet_shs_freq_enable __read_mostly = 1;

module_param(rmnet_shs_freq_enable, uint, 0644);

MODULE_PARM_DESC(rmnet_shs_freq_enable, "Enable/disable freq boost feature");



struct workqueue_struct *shs_boost_wq;

static DEFINE_PER_CPU(struct cpu_freq, cpu_boosts);

static struct work_struct boost_cpu;



static int rmnet_shs_freq_notify(struct notifier_block *nb,

				 unsigned long val,

				 void *data)

{

	struct cpufreq_policy *policy = data;

	unsigned int cpu = policy->cpu;

	struct cpu_freq *boost = &per_cpu(cpu_boosts, cpu);



	switch (val) {

	case CPUFREQ_ADJUST:

		if (rmnet_shs_freq_enable) {

			cpufreq_verify_within_limits(policy,

						     boost->freq_floor,

						     MAX_FREQ);

			trace_rmnet_freq_update(cpu, policy->min,

						policy->max);

		}

		break;

	}



	return NOTIFY_OK;

}



static struct notifier_block freq_boost_nb = {

	.notifier_call = rmnet_shs_freq_notify,

};



static void update_cpu_policy(struct work_struct *work)

{

	unsigned int i;



	get_online_cpus();

	for_each_online_cpu(i) {

		cpufreq_update_policy(i);

	}



	put_online_cpus();

}



void rmnet_shs_reset_freq(void)

{

	struct cpu_freq *boost;

	int i;



	for_each_possible_cpu(i) {

		boost = &per_cpu(cpu_boosts, i);

		boost->freq_floor = MIN_FREQ;

		boost->freq_ceil = MAX_FREQ;

	}

}



void rmnet_shs_boost_cpus()

{

	struct cpu_freq *boost;

	int i;



	for_each_possible_cpu(i) {



		if ((1 << i) & PERF_MASK)

			continue;

		boost = &per_cpu(cpu_boosts, i);

		boost->freq_floor = BOOST_FREQ;

		boost->freq_ceil = MAX_FREQ;

		trace_rmnet_freq_boost(i, boost->freq_floor);

	}



	if (work_pending(&boost_cpu))

		return;



	queue_work(shs_boost_wq, &boost_cpu);

}



void rmnet_shs_reset_cpus()

{

	struct cpu_freq *boost;

	int i;



	for_each_possible_cpu(i) {



		if ((1 << i) & PERF_MASK)

			continue;

		boost = &per_cpu(cpu_boosts, i);

		boost->freq_floor = MIN_FREQ;

		boost->freq_ceil = MAX_FREQ;

		trace_rmnet_freq_reset(i, boost->freq_floor);

	}

	if (work_pending(&boost_cpu))

		return;



	queue_work(shs_boost_wq, &boost_cpu);

}



int rmnet_shs_freq_init(void)

{

	shs_boost_wq = alloc_workqueue("shs_boost_wq", WQ_HIGHPRI, 0);



	if (!shs_boost_wq)

		return -EFAULT;

	INIT_WORK(&boost_cpu, update_cpu_policy);



	if (rmnet_shs_freq_enable)

		cpufreq_register_notifier(&freq_boost_nb,

					  CPUFREQ_POLICY_NOTIFIER);

	rmnet_shs_reset_freq();

	return 0;

}



int rmnet_shs_freq_exit(void)

{

	rmnet_shs_reset_freq();

	cancel_work_sync(&boost_cpu);



	if (rmnet_shs_freq_enable)

		cpufreq_unregister_notifier(&freq_boost_nb,

					    CPUFREQ_POLICY_NOTIFIER);

	return 0;

}

drivers/rmnet/shs/rmnet_shs_freq.h

0 → 100644
+24 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2019 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.

 *

 * RMNET Data Smart Hash solution

 *

 */



#ifndef _RMNET_SHS_FREQ_H_

#define _RMNET_SHS_FREQ_H_



int rmnet_shs_freq_init(void);

int rmnet_shs_freq_exit(void);

void rmnet_shs_boost_cpus(void);

void rmnet_shs_reset_cpus(void);



#endif