From 297b2a5dbd4fa7fd9b23054f5185544becceb94b Mon Sep 17 00:00:00 2001 From: Tao Zeng Date: Tue, 30 Apr 2019 10:56:18 +0800 Subject: [PATCH] bandwidth: add min bandwidth read in usage_stat [1/1] 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 --- drivers/amlogic/ddr_tool/ddr_bandwidth.c | 23 +++++++++++++++++++++++ include/linux/amlogic/aml_ddr_bandwidth.h | 1 + 2 files changed, 24 insertions(+) diff --git a/drivers/amlogic/ddr_tool/ddr_bandwidth.c b/drivers/amlogic/ddr_tool/ddr_bandwidth.c index 0eaea45..f468c30 100644 --- a/drivers/amlogic/ddr_tool/ddr_bandwidth.c +++ b/drivers/amlogic/ddr_tool/ddr_bandwidth.c @@ -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]++; @@ -340,8 +345,10 @@ 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; } @@ -355,6 +362,7 @@ 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) @@ -374,6 +382,20 @@ 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)); @@ -654,6 +676,7 @@ static int __init 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) { diff --git a/include/linux/amlogic/aml_ddr_bandwidth.h b/include/linux/amlogic/aml_ddr_bandwidth.h index ba0057d..d6e47c9 100644 --- a/include/linux/amlogic/aml_ddr_bandwidth.h +++ b/include/linux/amlogic/aml_ddr_bandwidth.h @@ -160,6 +160,7 @@ 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; -- 2.7.4