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opp: Expose bandwidth information via debugfs

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Expose the bandwidth information as well via debugfs.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
This commit is contained in:
Viresh Kumar 2020-05-18 14:25:32 +03:00
parent 8b17f17a09
commit 0430b1d570
3 changed files with 66 additions and 0 deletions
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18
drivers/interconnect/core.c
View File

@ -514,6 +514,24 @@ void icc_set_tag(struct icc_path *path, u32 tag)
}
EXPORT_SYMBOL_GPL(icc_set_tag);
/**
* icc_get_name() - Get name of the icc path
* @path: reference to the path returned by icc_get()
*
* This function is used by an interconnect consumer to get the name of the icc
* path.
*
* Returns a valid pointer on success, or NULL otherwise.
*/
const char *icc_get_name(struct icc_path *path)
{
if (!path)
return NULL;
return path->name;
}
EXPORT_SYMBOL_GPL(icc_get_name);
/**
* icc_set_bw() - set bandwidth constraints on an interconnect path
* @path: reference to the path returned by icc_get()

42
drivers/opp/debugfs.c
View File

@ -32,6 +32,47 @@ void opp_debug_remove_one(struct dev_pm_opp *opp)
debugfs_remove_recursive(opp->dentry);
}
static ssize_t bw_name_read(struct file *fp, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct icc_path *path = fp->private_data;
char buf[64];
int i;
i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path));
return simple_read_from_buffer(userbuf, count, ppos, buf, i);
}
static const struct file_operations bw_name_fops = {
.open = simple_open,
.read = bw_name_read,
.llseek = default_llseek,
};
static void opp_debug_create_bw(struct dev_pm_opp *opp,
struct opp_table *opp_table,
struct dentry *pdentry)
{
struct dentry *d;
char name[11];
int i;
for (i = 0; i < opp_table->path_count; i++) {
snprintf(name, sizeof(name), "icc-path-%.1d", i);
/* Create per-path directory */
d = debugfs_create_dir(name, pdentry);
debugfs_create_file("name", S_IRUGO, d, opp_table->paths[i],
&bw_name_fops);
debugfs_create_u32("peak_bw", S_IRUGO, d,
&opp->bandwidth[i].peak);
debugfs_create_u32("avg_bw", S_IRUGO, d,
&opp->bandwidth[i].avg);
}
}
static void opp_debug_create_supplies(struct dev_pm_opp *opp,
struct opp_table *opp_table,
struct dentry *pdentry)
@ -94,6 +135,7 @@ void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
&opp->clock_latency_ns);
opp_debug_create_supplies(opp, opp_table, d);
opp_debug_create_bw(opp, opp_table, d);
opp->dentry = d;
}

6
include/linux/interconnect.h
View File

@ -32,6 +32,7 @@ struct icc_path *of_icc_get_by_index(struct device *dev, int idx);
void icc_put(struct icc_path *path);
int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
void icc_set_tag(struct icc_path *path, u32 tag);
const char *icc_get_name(struct icc_path *path);
#else
@ -65,6 +66,11 @@ static inline void icc_set_tag(struct icc_path *path, u32 tag)
{
}
static inline const char *icc_get_name(struct icc_path *path)
{
return NULL;
}
#endif /* CONFIG_INTERCONNECT */
#endif /* __LINUX_INTERCONNECT_H */