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PM / devfreq: cache_hwmon: Use array for reporting monitor stats

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Using an array to report monitor stats instead of hard coded variable
names would allow for cleaner implementations of some cache hwmon
device drivers.

Change-Id: I787bdc12f10a0c8ff3c4195ce229a2987acdfce7
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
This commit is contained in:
Junjie Wu 2014-10-30 12:13:03 -07:00 • committed by David Keitel
parent 95f77a9ab3
commit e6ce87f53c
3 changed files with 20 additions and 14 deletions
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15
drivers/devfreq/governor_cache_hwmon.c
View file

@ -134,7 +134,8 @@ static unsigned long measure_mrps_and_set_irq(struct cache_hwmon_node *node,
dev_dbg(hw->df->dev.parent,
"stat H=%3lu, M=%3lu, T=%3lu, b=%3u, f=%4lu, us=%d\n",
stat->high, stat->med, stat->high + stat->med,
stat->mrps[HIGH], stat->mrps[MED],
stat->mrps[HIGH] + stat->mrps[MED],
stat->busy_percent, hw->df->previous_freq / 1000, us);
return 0;
@ -146,9 +147,9 @@ static void compute_cache_freq(struct cache_hwmon_node *node,
unsigned long new_mhz;
unsigned int busy;
new_mhz = mrps->high * node->cycles_per_high_req
+ mrps->med * node->cycles_per_med_req
+ mrps->low * node->cycles_per_low_req;
new_mhz = mrps->mrps[HIGH] * node->cycles_per_high_req
+ mrps->mrps[MED] * node->cycles_per_med_req
+ mrps->mrps[LOW] * node->cycles_per_low_req;
busy = max(node->min_busy, mrps->busy_percent);
busy = min(node->max_busy, busy);
@ -278,9 +279,9 @@ static int start_monitoring(struct devfreq *df)
node->prev_ts = ktime_get();
node->prev_mhz = 0;
mrps.high = (df->previous_freq / 1000) - node->guard_band_mhz;
mrps.high /= node->cycles_per_high_req;
mrps.med = mrps.low = 0;
mrps.mrps[HIGH] = (df->previous_freq / 1000) - node->guard_band_mhz;
mrps.mrps[HIGH] /= node->cycles_per_high_req;
mrps.mrps[MED] = mrps.mrps[LOW] = 0;
ret = hw->start_hwmon(hw, &mrps);
if (ret) {

11
drivers/devfreq/governor_cache_hwmon.h
View file

@ -17,10 +17,15 @@
#include <linux/kernel.h>
#include <linux/devfreq.h>
enum request_group {
HIGH,
MED,
LOW,
MAX_NUM_GROUPS,
};
struct mrps_stats {
unsigned long high;
unsigned long med;
unsigned long low;
unsigned long mrps[MAX_NUM_GROUPS];
unsigned int busy_percent;
};

8
drivers/devfreq/krait-l2pm.c
View file

@ -328,9 +328,9 @@ static unsigned long meas_mrps_and_set_irq(struct cache_hwmon *hw,
mon_enable(L2_M_REQ_MON);
mon_enable(L2_CYC_MON);
mrps->high = t_mrps - m_mrps;
mrps->med = m_mrps;
mrps->low = 0;
mrps->mrps[HIGH] = t_mrps - m_mrps;
mrps->mrps[MED] = m_mrps;
mrps->mrps[LOW] = 0;
mrps->busy_percent = mult_frac(l2_cyc, 1000, us) * 100 / f;
return 0;
@ -363,7 +363,7 @@ static int start_mrps_hwmon(struct cache_hwmon *hw, struct mrps_stats *mrps)
mon_disable(L2_M_REQ_MON);
mon_disable(L2_CYC_MON);
limit = mrps_to_count(mrps->high, hw->df->profile->polling_ms, 0);
limit = mrps_to_count(mrps->mrps[HIGH], hw->df->profile->polling_ms, 0);
prev_req_start_val = mon_set_limit(L2_H_REQ_MON, limit);
mon_set_limit(L2_M_REQ_MON, 0xFFFFFFFF);
mon_set_limit(L2_CYC_MON, 0xFFFFFFFF);