shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 03:40:35 +09:00
Code Issues Packages Projects Releases Wiki Activity

bandwidth: add min bandwidth read in usage_stat [1/1]

Browse Source 
PD#SWPL-7960

Problem:
There is no min ddr bandwidth data

Solution:
Add this value in sysfs

Verify:
p212

Change-Id: I9d90476d30c0ca7789046d8d205f0802de2b4acf
Signed-off-by: Tao Zeng <tao.zeng@amlogic.com>
This commit is contained in:
Tao Zeng
2019-04-30 10:56:18 +08:00
committed by Luan Yuan
parent 326b74f813
commit cd3a23d8e8
2 changed files with 24 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/amlogic/ddr_tool/ddr_bandwidth.c
View File

@@ -104,6 +104,11 @@ static void cal_ddr_usage(struct ddr_bandwidth *db, struct ddr_grant *dg)
memcpy(&db->max_sample, &db->cur_sample,
sizeof(struct ddr_bandwidth_sample));
}
/* update min sample */
if (db->cur_sample.total_bandwidth < db->min_sample.total_bandwidth) {
memcpy(&db->min_sample, &db->cur_sample,
sizeof(struct ddr_bandwidth_sample));
}
/* update usage statistics */
db->usage_stat[db->cur_sample.total_usage / 1000]++;
@@ -338,8 +343,10 @@ static ssize_t usage_stat_store(struct class *cla,
/* clear flag and start statistics */
spin_lock_irqsave(&aml_db->lock, flags);
memset(&aml_db->max_sample, 0, sizeof(struct ddr_bandwidth_sample));
memset(&aml_db->min_sample, 0, sizeof(struct ddr_bandwidth_sample));
memset(aml_db->usage_stat, 0, 10 * sizeof(int));
memset(&aml_db->avg, 0, sizeof(struct ddr_avg_bandwidth));
aml_db->min_sample.total_bandwidth = 0xffffffff;
spin_unlock_irqrestore(&aml_db->lock, flags);
return count;
}
@@ -353,6 +360,7 @@ static ssize_t usage_stat_show(struct class *cla,
unsigned long total_count = 0;
struct ddr_avg_bandwidth tmp;
#define MAX_PREFIX "MAX bandwidth: %8d KB/s, usage: %2d.%02d%%"
#define MIN_PREFIX "MIN bandwidth: %8d KB/s, usage: %2d.%02d%%"
#define AVG_PREFIX "AVG bandwidth: %8lld KB/s, usage: %2d.%02d%%"
if (aml_db->mode != MODE_ENABLE)
@@ -372,6 +380,20 @@ static ssize_t usage_stat_show(struct class *cla,
aml_db->max_sample.bandwidth[i]);
}
/* show for min bandwidth */
percent = aml_db->min_sample.total_usage / 100;
rem = aml_db->min_sample.total_usage % 100;
tick = aml_db->min_sample.tick;
do_div(tick, 1000);
s += sprintf(buf + s, MIN_PREFIX", tick:%lld us\n",
aml_db->min_sample.total_bandwidth,
percent, rem, tick);
for (i = 0; i < aml_db->channels; i++) {
s += sprintf(buf + s, "ch:%d port:%16llx: %8d KB/s\n",
i, aml_db->port[i],
aml_db->min_sample.bandwidth[i]);
}
/* show for average bandwidth */
if (aml_db->avg.sample_count) {
memcpy(&tmp, &aml_db->avg, sizeof(tmp));
@@ -652,6 +674,7 @@ static int __ref ddr_bandwidth_probe(struct platform_device *pdev)
if (!aml_db)
return -ENOMEM;
aml_db->min_sample.total_bandwidth = 0xffffffff;
aml_db->cpu_type = get_meson_cpu_version(0);
pr_info("chip type:0x%x\n", aml_db->cpu_type);
if (aml_db->cpu_type < MESON_CPU_MAJOR_ID_M8B) {

1
include/linux/amlogic/aml_ddr_bandwidth.h
View File

@@ -159,6 +159,7 @@ struct ddr_bandwidth {
spinlock_t lock;
struct ddr_bandwidth_sample cur_sample;
struct ddr_bandwidth_sample max_sample;
struct ddr_bandwidth_sample min_sample;
struct ddr_avg_bandwidth avg;
u64 port[MAX_CHANNEL];
void __iomem *ddr_reg;