mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-20 11:13:58 +08:00
PM / OPP: Don't allocate OPP table from _opp_allocate()
There is no point in trying to find/allocate the table for every OPP that is added for a device. It would be far more efficient to allocate the table only once and pass its pointer to the routines that add the OPP entry. Locking is removed from _opp_add_static_v2() and _opp_add_v1() now as the callers call them with that lock already held. Call to _remove_opp_table() routine is also removed from _opp_free() now, as opp_table isn't allocated from within _opp_allocate(). This is handled by the routines which created the OPP table in the first place. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar
Rafael J. Wysocki
parent
9274c89243
commit
8cd2f6e8f3
@ -829,7 +829,7 @@ struct opp_device *_add_opp_dev(const struct device *dev,
|
||||
*
|
||||
* Return: valid opp_table pointer if success, else NULL.
|
||||
*/
|
||||
static struct opp_table *_add_opp_table(struct device *dev)
|
||||
struct opp_table *_add_opp_table(struct device *dev)
|
||||
{
|
||||
struct opp_table *opp_table;
|
||||
struct opp_device *opp_dev;
|
||||
@ -929,10 +929,9 @@ static void _remove_opp_table(struct opp_table *opp_table)
|
||||
_kfree_device_rcu);
|
||||
}
|
||||
|
||||
void _opp_free(struct dev_pm_opp *opp, struct opp_table *opp_table)
|
||||
void _opp_free(struct dev_pm_opp *opp)
|
||||
{
|
||||
kfree(opp);
|
||||
_remove_opp_table(opp_table);
|
||||
}
|
||||
|
||||
/**
|
||||
@ -1016,16 +1015,10 @@ unlock:
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
|
||||
|
||||
struct dev_pm_opp *_opp_allocate(struct device *dev,
|
||||
struct opp_table **opp_table)
|
||||
struct dev_pm_opp *_opp_allocate(struct opp_table *table)
|
||||
{
|
||||
struct dev_pm_opp *opp;
|
||||
int count, supply_size;
|
||||
struct opp_table *table;
|
||||
|
||||
table = _add_opp_table(dev);
|
||||
if (!table)
|
||||
return NULL;
|
||||
|
||||
/* Allocate space for at least one supply */
|
||||
count = table->regulator_count ? table->regulator_count : 1;
|
||||
@ -1033,17 +1026,13 @@ struct dev_pm_opp *_opp_allocate(struct device *dev,
|
||||
|
||||
/* allocate new OPP node and supplies structures */
|
||||
opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL);
|
||||
if (!opp) {
|
||||
kfree(table);
|
||||
if (!opp)
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Put the supplies at the end of the OPP structure as an empty array */
|
||||
opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
|
||||
INIT_LIST_HEAD(&opp->node);
|
||||
|
||||
*opp_table = table;
|
||||
|
||||
return opp;
|
||||
}
|
||||
|
||||
@ -1133,6 +1122,7 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
|
||||
|
||||
/**
|
||||
* _opp_add_v1() - Allocate a OPP based on v1 bindings.
|
||||
* @opp_table: OPP table
|
||||
* @dev: device for which we do this operation
|
||||
* @freq: Frequency in Hz for this OPP
|
||||
* @u_volt: Voltage in uVolts for this OPP
|
||||
@ -1158,22 +1148,18 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
|
||||
* Duplicate OPPs (both freq and volt are same) and !opp->available
|
||||
* -ENOMEM Memory allocation failure
|
||||
*/
|
||||
int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt,
|
||||
bool dynamic)
|
||||
int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
|
||||
unsigned long freq, long u_volt, bool dynamic)
|
||||
{
|
||||
struct opp_table *opp_table;
|
||||
struct dev_pm_opp *new_opp;
|
||||
unsigned long tol;
|
||||
int ret;
|
||||
|
||||
/* Hold our table modification lock here */
|
||||
mutex_lock(&opp_table_lock);
|
||||
opp_rcu_lockdep_assert();
|
||||
|
||||
new_opp = _opp_allocate(dev, &opp_table);
|
||||
if (!new_opp) {
|
||||
ret = -ENOMEM;
|
||||
goto unlock;
|
||||
}
|
||||
new_opp = _opp_allocate(opp_table);
|
||||
if (!new_opp)
|
||||
return -ENOMEM;
|
||||
|
||||
/* populate the opp table */
|
||||
new_opp->rate = freq;
|
||||
@ -1192,8 +1178,6 @@ int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt,
|
||||
goto free_opp;
|
||||
}
|
||||
|
||||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
/*
|
||||
* Notify the changes in the availability of the operable
|
||||
* frequency/voltage list.
|
||||
@ -1202,9 +1186,8 @@ int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt,
|
||||
return 0;
|
||||
|
||||
free_opp:
|
||||
_opp_free(new_opp, opp_table);
|
||||
unlock:
|
||||
mutex_unlock(&opp_table_lock);
|
||||
_opp_free(new_opp);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
@ -1722,7 +1705,25 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_register_put_opp_helper);
|
||||
*/
|
||||
int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
|
||||
{
|
||||
return _opp_add_v1(dev, freq, u_volt, true);
|
||||
struct opp_table *opp_table;
|
||||
int ret;
|
||||
|
||||
/* Hold our table modification lock here */
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
opp_table = _add_opp_table(dev);
|
||||
if (!opp_table) {
|
||||
ret = -ENOMEM;
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
ret = _opp_add_v1(opp_table, dev, freq, u_volt, true);
|
||||
if (ret)
|
||||
_remove_opp_table(opp_table);
|
||||
|
||||
unlock:
|
||||
mutex_unlock(&opp_table_lock);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_add);
|
||||
|
||||
@ -1888,8 +1889,8 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier);
|
||||
* Free OPPs either created using static entries present in DT or even the
|
||||
* dynamically added entries based on remove_all param.
|
||||
*/
|
||||
static void _dev_pm_opp_remove_table(struct opp_table *opp_table,
|
||||
struct device *dev, bool remove_all)
|
||||
void _dev_pm_opp_remove_table(struct opp_table *opp_table, struct device *dev,
|
||||
bool remove_all)
|
||||
{
|
||||
struct dev_pm_opp *opp, *tmp;
|
||||
|
||||
|
||||
@ -255,6 +255,7 @@ static struct device_node *_of_get_opp_desc_node(struct device *dev)
|
||||
|
||||
/**
|
||||
* _opp_add_static_v2() - Allocate static OPPs (As per 'v2' DT bindings)
|
||||
* @opp_table: OPP table
|
||||
* @dev: device for which we do this operation
|
||||
* @np: device node
|
||||
*
|
||||
@ -276,22 +277,17 @@ static struct device_node *_of_get_opp_desc_node(struct device *dev)
|
||||
* -ENOMEM Memory allocation failure
|
||||
* -EINVAL Failed parsing the OPP node
|
||||
*/
|
||||
static int _opp_add_static_v2(struct device *dev, struct device_node *np)
|
||||
static int _opp_add_static_v2(struct opp_table *opp_table, struct device *dev,
|
||||
struct device_node *np)
|
||||
{
|
||||
struct opp_table *opp_table;
|
||||
struct dev_pm_opp *new_opp;
|
||||
u64 rate;
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
/* Hold our table modification lock here */
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
new_opp = _opp_allocate(dev, &opp_table);
|
||||
if (!new_opp) {
|
||||
ret = -ENOMEM;
|
||||
goto unlock;
|
||||
}
|
||||
new_opp = _opp_allocate(opp_table);
|
||||
if (!new_opp)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = of_property_read_u64(np, "opp-hz", &rate);
|
||||
if (ret < 0) {
|
||||
@ -347,8 +343,6 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
|
||||
if (new_opp->clock_latency_ns > opp_table->clock_latency_ns_max)
|
||||
opp_table->clock_latency_ns_max = new_opp->clock_latency_ns;
|
||||
|
||||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n",
|
||||
__func__, new_opp->turbo, new_opp->rate,
|
||||
new_opp->supplies[0].u_volt, new_opp->supplies[0].u_volt_min,
|
||||
@ -362,9 +356,8 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
|
||||
return 0;
|
||||
|
||||
free_opp:
|
||||
_opp_free(new_opp, opp_table);
|
||||
unlock:
|
||||
mutex_unlock(&opp_table_lock);
|
||||
_opp_free(new_opp);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
@ -382,16 +375,20 @@ static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
|
||||
/* OPPs are already managed */
|
||||
if (!_add_opp_dev(dev, opp_table))
|
||||
ret = -ENOMEM;
|
||||
mutex_unlock(&opp_table_lock);
|
||||
return ret;
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
opp_table = _add_opp_table(dev);
|
||||
if (!opp_table) {
|
||||
ret = -ENOMEM;
|
||||
goto unlock;
|
||||
}
|
||||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
/* We have opp-table node now, iterate over it and add OPPs */
|
||||
for_each_available_child_of_node(opp_np, np) {
|
||||
count++;
|
||||
|
||||
ret = _opp_add_static_v2(dev, np);
|
||||
ret = _opp_add_static_v2(opp_table, dev, np);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: Failed to add OPP, %d\n", __func__,
|
||||
ret);
|
||||
@ -400,15 +397,8 @@ static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
|
||||
}
|
||||
|
||||
/* There should be one of more OPP defined */
|
||||
if (WARN_ON(!count))
|
||||
return -ENOENT;
|
||||
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
opp_table = _find_opp_table(dev);
|
||||
if (WARN_ON(IS_ERR(opp_table))) {
|
||||
ret = PTR_ERR(opp_table);
|
||||
mutex_unlock(&opp_table_lock);
|
||||
if (WARN_ON(!count)) {
|
||||
ret = -ENOENT;
|
||||
goto free_table;
|
||||
}
|
||||
|
||||
@ -418,12 +408,12 @@ static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
|
||||
else
|
||||
opp_table->shared_opp = OPP_TABLE_ACCESS_EXCLUSIVE;
|
||||
|
||||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
return 0;
|
||||
goto unlock;
|
||||
|
||||
free_table:
|
||||
dev_pm_opp_of_remove_table(dev);
|
||||
_dev_pm_opp_remove_table(opp_table, dev, false);
|
||||
unlock:
|
||||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
@ -431,9 +421,10 @@ free_table:
|
||||
/* Initializes OPP tables based on old-deprecated bindings */
|
||||
static int _of_add_opp_table_v1(struct device *dev)
|
||||
{
|
||||
struct opp_table *opp_table;
|
||||
const struct property *prop;
|
||||
const __be32 *val;
|
||||
int nr, ret;
|
||||
int nr, ret = 0;
|
||||
|
||||
prop = of_find_property(dev->of_node, "operating-points", NULL);
|
||||
if (!prop)
|
||||
@ -451,22 +442,32 @@ static int _of_add_opp_table_v1(struct device *dev)
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
opp_table = _add_opp_table(dev);
|
||||
if (!opp_table) {
|
||||
ret = -ENOMEM;
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
val = prop->value;
|
||||
while (nr) {
|
||||
unsigned long freq = be32_to_cpup(val++) * 1000;
|
||||
unsigned long volt = be32_to_cpup(val++);
|
||||
|
||||
ret = _opp_add_v1(dev, freq, volt, false);
|
||||
ret = _opp_add_v1(opp_table, dev, freq, volt, false);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: Failed to add OPP %ld (%d)\n",
|
||||
__func__, freq, ret);
|
||||
dev_pm_opp_of_remove_table(dev);
|
||||
return ret;
|
||||
_dev_pm_opp_remove_table(opp_table, dev, false);
|
||||
break;
|
||||
}
|
||||
nr -= 2;
|
||||
}
|
||||
|
||||
return 0;
|
||||
unlock:
|
||||
mutex_unlock(&opp_table_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
|
||||
@ -191,13 +191,16 @@ struct opp_table {
|
||||
|
||||
/* Routines internal to opp core */
|
||||
struct opp_table *_find_opp_table(struct device *dev);
|
||||
struct opp_table *_add_opp_table(struct device *dev);
|
||||
struct opp_device *_add_opp_dev(const struct device *dev, struct opp_table *opp_table);
|
||||
void _dev_pm_opp_remove_table(struct opp_table *opp_table, struct device *dev, bool remove_all);
|
||||
void _dev_pm_opp_find_and_remove_table(struct device *dev, bool remove_all);
|
||||
struct dev_pm_opp *_opp_allocate(struct device *dev, struct opp_table **opp_table);
|
||||
void _opp_free(struct dev_pm_opp *opp, struct opp_table *opp_table);
|
||||
struct dev_pm_opp *_opp_allocate(struct opp_table *opp_table);
|
||||
void _opp_free(struct dev_pm_opp *opp);
|
||||
int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *opp_table);
|
||||
int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt, bool dynamic);
|
||||
int _opp_add_v1(struct opp_table *opp_table, struct device *dev, unsigned long freq, long u_volt, bool dynamic);
|
||||
void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of);
|
||||
struct opp_table *_add_opp_table(struct device *dev);
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
void _of_init_opp_table(struct opp_table *opp_table, struct device *dev);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user