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devfreq: snapshot of CPUBW HW monitor governor

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CPUBW HW monitor governor driver snapshot from msm-5.4 branch
commit 935e772d ("devfreq: governor_bw_hwmon: fix deadlock warning").

Change-Id: I076295022d742490360f643ee3157b428cc356fb
Signed-off-by: Prasadarao Durvasula <quic_pdurvasu@quicinc.com>
This commit is contained in:
Prasadarao Durvasula 2024-03-28 00:58:58 +05:30 • committed by Sai Kannan Chintakayala
parent 7f32770218
commit 52626ef730
4 changed files with 1124 additions and 0 deletions
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10
drivers/devfreq/Kconfig
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@ -74,6 +74,16 @@ config DEVFREQ_GOV_PASSIVE
through sysfs entries. The passive governor recommends that
devfreq device uses the OPP table to get the frequency/voltage.
config DEVFREQ_GOV_QCOM_BW_HWMON
tristate "HW monitor based governor for device BW"
depends on QCOM_BIMC_BWMON
help
HW monitor based governor for device to DDR bandwidth voting.
This governor sets the CPU BW vote by using BIMC counters to monitor
the CPU's use of DDR. Since this uses target specific counters it
can conflict with existing profiling tools. This governor is unlikely
to be useful for non-QCOM devices.
comment "DEVFREQ Drivers"
config ARM_EXYNOS_BUS_DEVFREQ

1
drivers/devfreq/Makefile
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@ -6,6 +6,7 @@ obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE) += governor_performance.o
obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE) += governor_powersave.o
obj-$(CONFIG_DEVFREQ_GOV_USERSPACE) += governor_userspace.o
obj-$(CONFIG_DEVFREQ_GOV_PASSIVE) += governor_passive.o
obj-$(CONFIG_DEVFREQ_GOV_QCOM_BW_HWMON) += governor_bw_hwmon.o
# DEVFREQ Drivers
obj-$(CONFIG_ARM_EXYNOS_BUS_DEVFREQ) += exynos-bus.o

1032
drivers/devfreq/governor_bw_hwmon.c Normal file
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File diff suppressed because it is too large Load diff

81
drivers/devfreq/governor_bw_hwmon.h Normal file
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@ -0,0 +1,81 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2013-2021, The Linux Foundation. All rights reserved.
* Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved.
*/
#ifndef _GOVERNOR_BW_HWMON_H
#define _GOVERNOR_BW_HWMON_H
#include <linux/kernel.h>
#include <linux/devfreq.h>
/**
* struct bw_hwmon - dev BW HW monitor info
* @start_hwmon: Start the HW monitoring of the dev BW
* @stop_hwmon: Stop the HW monitoring of dev BW
* @set_thres: Set the count threshold to generate an IRQ
* @get_bytes_and_clear: Get the bytes transferred since the last call
* and reset the counter to start over.
* @set_throttle_adj: Set throttle adjust field to the given value
* @get_throttle_adj: Get the value written to throttle adjust field
* @dev: Pointer to device that this HW monitor can
* monitor.
* @of_node: OF node of device that this HW monitor can
* monitor.
* @gov: devfreq_governor struct that should be used
* when registering this HW monitor with devfreq.
* Only the name field is expected to be
* initialized.
* @df: Devfreq node that this HW monitor is being
* used for. NULL when not actively in use and
* non-NULL when in use.
*
* One of dev, of_node or governor_name needs to be specified for a
* successful registration.
*
*/
struct bw_hwmon {
int (*start_hwmon)(struct bw_hwmon *hw,
unsigned long mbps);
void (*stop_hwmon)(struct bw_hwmon *hw);
int (*suspend_hwmon)(struct bw_hwmon *hw);
int (*resume_hwmon)(struct bw_hwmon *hw);
unsigned long (*set_thres)(struct bw_hwmon *hw,
unsigned long bytes);
unsigned long (*set_hw_events)(struct bw_hwmon *hw,
unsigned int sample_ms);
unsigned long (*get_bytes_and_clear)(struct bw_hwmon *hw);
int (*set_throttle_adj)(struct bw_hwmon *hw,
uint adj);
u32 (*get_throttle_adj)(struct bw_hwmon *hw);
struct device *dev;
struct device_node *of_node;
struct devfreq_governor *gov;
unsigned long up_wake_mbps;
unsigned long down_wake_mbps;
unsigned int down_cnt;
struct devfreq *df;
};
#if IS_ENABLED(CONFIG_DEVFREQ_GOV_QCOM_BW_HWMON)
int register_bw_hwmon(struct device *dev, struct bw_hwmon *hwmon);
int update_bw_hwmon(struct bw_hwmon *hwmon);
int bw_hwmon_sample_end(struct bw_hwmon *hwmon);
#else
static inline int register_bw_hwmon(struct device *dev,
struct bw_hwmon *hwmon)
{
return 0;
}
static inline int update_bw_hwmon(struct bw_hwmon *hwmon)
{
return 0;
}
static inline int bw_hwmon_sample_end(struct bw_hwmon *hwmon)
{
return 0;
}
#endif
#endif /* _GOVERNOR_BW_HWMON_H */