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devfreq: wmark: active: add wmark margin attrs

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Add configurable high and low watermark margins to wmark_active
governor. As the names suggested, they represent the margins of
a given watermark. A smaller margin means a tighter load threshold
to trigger the frequency adjustment and vice versa.

Bug 200493763

Change-Id: Ie41e311dd483a1ad2f917ac7296f392262b5fd1f
Signed-off-by: Andrew Chen <andrewc@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2819287
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: David Ung <davidu@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Andrew Chen
2022-11-30 15:06:51 +00:00
committed by Laxman Dewangan
parent 219d548fd4
commit 24d4fa2e60
1 changed files with 137 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

139
drivers/devfreq/governor_wmark_active.c
View File

@@ -33,6 +33,8 @@ struct wmark_gov_param {
unsigned int load_target;
unsigned int load_max;
unsigned int smooth;
unsigned int high_wmark_margin;
unsigned int low_wmark_margin;
bool freq_boost_en;
};
@@ -48,6 +50,8 @@ struct wmark_gov_info {
struct kobj_attribute load_target_attr;
struct kobj_attribute load_max_attr;
struct kobj_attribute smooth_attr;
struct kobj_attribute high_wmark_margin_attr;
struct kobj_attribute low_wmark_margin_attr;
struct kobj_attribute freq_boost_en_attr;
spinlock_t param_lock;
@@ -70,13 +74,22 @@ struct wmark_gov_info {
static unsigned long freqlist_up(struct wmark_gov_info *wmarkinfo,
unsigned long curr_freq)
{
unsigned long flags;
int i, pos;
int margin;
spin_lock_irqsave(&wmarkinfo->param_lock, flags);
if (wmarkinfo->param.high_wmark_margin > INT_MAX)
margin = wmarkinfo->freq_count - 1;
else
margin = wmarkinfo->param.high_wmark_margin;
spin_unlock_irqrestore(&wmarkinfo->param_lock, flags);
for (i = 0; i < wmarkinfo->freq_count; i++)
if (wmarkinfo->freqlist[i] > curr_freq)
break;
pos = min(wmarkinfo->freq_count - 1, i);
pos = min(wmarkinfo->freq_count - 1, i + margin);
return wmarkinfo->freqlist[pos];
}
@@ -84,13 +97,22 @@ static unsigned long freqlist_up(struct wmark_gov_info *wmarkinfo,
static unsigned long freqlist_down(struct wmark_gov_info *wmarkinfo,
unsigned long curr_freq)
{
unsigned long flags;
int i, pos;
int margin;
spin_lock_irqsave(&wmarkinfo->param_lock, flags);
if (wmarkinfo->param.low_wmark_margin > INT_MAX)
margin = wmarkinfo->freq_count - 1;
else
margin = wmarkinfo->param.low_wmark_margin;
spin_unlock_irqrestore(&wmarkinfo->param_lock, flags);
for (i = wmarkinfo->freq_count - 1; i >= 0; i--)
if (wmarkinfo->freqlist[i] < curr_freq)
break;
pos = max(0, i);
pos = max(0, i - margin);
return wmarkinfo->freqlist[pos];
}
@@ -418,6 +440,99 @@ static ssize_t smooth_store(struct kobject *kobj,
return count;
}
static ssize_t high_wmark_margin_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
struct wmark_gov_info *wmarkinfo = NULL;
ssize_t res;
unsigned int val;
unsigned long flags;
wmarkinfo = container_of(attr,
struct wmark_gov_info,
high_wmark_margin_attr);
spin_lock_irqsave(&wmarkinfo->param_lock, flags);
val = wmarkinfo->param.high_wmark_margin;
spin_unlock_irqrestore(&wmarkinfo->param_lock, flags);
res = snprintf(buf, PAGE_SIZE, "%u\n", val);
if (res >= PAGE_SIZE)
return -EINVAL;
return res;
}
static ssize_t high_wmark_margin_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct wmark_gov_info *wmarkinfo = NULL;
unsigned int val = 0;
unsigned long flags;
wmarkinfo = container_of(attr,
struct wmark_gov_info,
high_wmark_margin_attr);
if (kstrtou32(buf, 0, &val) < 0)
return -EINVAL;
spin_lock_irqsave(&wmarkinfo->param_lock, flags);
wmarkinfo->param.high_wmark_margin = val;
spin_unlock_irqrestore(&wmarkinfo->param_lock, flags);
return count <= INT_MAX ? count : -EINVAL;
}
static ssize_t low_wmark_margin_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
struct wmark_gov_info *wmarkinfo = NULL;
ssize_t res;
unsigned int val;
unsigned long flags;
wmarkinfo = container_of(attr,
struct wmark_gov_info,
low_wmark_margin_attr);
spin_lock_irqsave(&wmarkinfo->param_lock, flags);
val = wmarkinfo->param.low_wmark_margin;
spin_unlock_irqrestore(&wmarkinfo->param_lock, flags);
res = snprintf(buf, PAGE_SIZE, "%u\n", val);
if (res >= PAGE_SIZE)
return -EINVAL;
return res;
}
static ssize_t low_wmark_margin_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct wmark_gov_info *wmarkinfo = NULL;
unsigned int val = 0;
unsigned long flags;
wmarkinfo = container_of(attr,
struct wmark_gov_info,
low_wmark_margin_attr);
if (kstrtou32(buf, 0, &val) < 0)
return -EINVAL;
spin_lock_irqsave(&wmarkinfo->param_lock, flags);
wmarkinfo->param.low_wmark_margin = val;
spin_unlock_irqrestore(&wmarkinfo->param_lock, flags);
return count <= INT_MAX ? count : -EINVAL;
}
static ssize_t freq_boost_en_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
@@ -501,6 +616,16 @@ static int devfreq_watermark_debug_start(struct devfreq *df)
if (sysfs_create_file(&df->dev.parent->kobj, &attr->attr))
goto err_create_smooth_sysfs_entry;
attr = &wmarkinfo->high_wmark_margin_attr;
INIT_SYSFS_ATTR_RW(high_wmark_margin);
if (sysfs_create_file(&df->dev.parent->kobj, &attr->attr))
goto err_create_high_wmark_margin_sysfs_entry;
attr = &wmarkinfo->low_wmark_margin_attr;
INIT_SYSFS_ATTR_RW(low_wmark_margin);
if (sysfs_create_file(&df->dev.parent->kobj, &attr->attr))
goto err_create_low_wmark_margin_sysfs_entry;
attr = &wmarkinfo->freq_boost_en_attr;
INIT_SYSFS_ATTR_RW(freq_boost_en);
if (sysfs_create_file(&df->dev.parent->kobj, &attr->attr))
@@ -509,6 +634,12 @@ static int devfreq_watermark_debug_start(struct devfreq *df)
return 0;
err_create_freq_boost_en_sysfs_entry:
sysfs_remove_file(&df->dev.parent->kobj,
&wmarkinfo->low_wmark_margin_attr.attr);
err_create_low_wmark_margin_sysfs_entry:
sysfs_remove_file(&df->dev.parent->kobj,
&wmarkinfo->high_wmark_margin_attr.attr);
err_create_high_wmark_margin_sysfs_entry:
sysfs_remove_file(&df->dev.parent->kobj,
&wmarkinfo->smooth_attr.attr);
err_create_smooth_sysfs_entry:
@@ -531,6 +662,10 @@ static void devfreq_watermark_debug_stop(struct devfreq *df)
sysfs_remove_file(&df->dev.parent->kobj,
&wmarkinfo->freq_boost_en_attr.attr);
sysfs_remove_file(&df->dev.parent->kobj,
&wmarkinfo->high_wmark_margin_attr.attr);
sysfs_remove_file(&df->dev.parent->kobj,
&wmarkinfo->low_wmark_margin_attr.attr);
sysfs_remove_file(&df->dev.parent->kobj,
&wmarkinfo->smooth_attr.attr);
sysfs_remove_file(&df->dev.parent->kobj,