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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-10-23 23:02:36 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-10-23 23:02:36 +0200
commit37c72cac0e2ef9cd3c53dc9369a35dad6ef23f00 (patch)
tree4545352c55dd802894ece238021f65a419742d90 /kernel/power
parentMerge branches 'acpi-ec' and 'acpi-platform' (diff)
parentPM / QoS: Add PM_QOS_MEMORY_BANDWIDTH class (diff)
downloadlinux-37c72cac0e2ef9cd3c53dc9369a35dad6ef23f00.tar.xz
linux-37c72cac0e2ef9cd3c53dc9369a35dad6ef23f00.zip
Merge branch 'pm-qos'
* pm-qos: PM / QoS: Add PM_QOS_MEMORY_BANDWIDTH class
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/qos.c27
1 files changed, 26 insertions, 1 deletions
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 884b77058864..5f4c006c4b1e 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -105,11 +105,27 @@ static struct pm_qos_object network_throughput_pm_qos = {
};
+static BLOCKING_NOTIFIER_HEAD(memory_bandwidth_notifier);
+static struct pm_qos_constraints memory_bw_constraints = {
+ .list = PLIST_HEAD_INIT(memory_bw_constraints.list),
+ .target_value = PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE,
+ .default_value = PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE,
+ .no_constraint_value = PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE,
+ .type = PM_QOS_SUM,
+ .notifiers = &memory_bandwidth_notifier,
+};
+static struct pm_qos_object memory_bandwidth_pm_qos = {
+ .constraints = &memory_bw_constraints,
+ .name = "memory_bandwidth",
+};
+
+
static struct pm_qos_object *pm_qos_array[] = {
&null_pm_qos,
&cpu_dma_pm_qos,
&network_lat_pm_qos,
- &network_throughput_pm_qos
+ &network_throughput_pm_qos,
+ &memory_bandwidth_pm_qos,
};
static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
@@ -130,6 +146,9 @@ static const struct file_operations pm_qos_power_fops = {
/* unlocked internal variant */
static inline int pm_qos_get_value(struct pm_qos_constraints *c)
{
+ struct plist_node *node;
+ int total_value = 0;
+
if (plist_head_empty(&c->list))
return c->no_constraint_value;
@@ -140,6 +159,12 @@ static inline int pm_qos_get_value(struct pm_qos_constraints *c)
case PM_QOS_MAX:
return plist_last(&c->list)->prio;
+ case PM_QOS_SUM:
+ plist_for_each(node, &c->list)
+ total_value += node->prio;
+
+ return total_value;
+
default:
/* runtime check for not using enum */
BUG();