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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-10-23 23:02:36 +0200 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-10-23 23:02:36 +0200 |
commit | 37c72cac0e2ef9cd3c53dc9369a35dad6ef23f00 (patch) | |
tree | 4545352c55dd802894ece238021f65a419742d90 /kernel/power | |
parent | Merge branches 'acpi-ec' and 'acpi-platform' (diff) | |
parent | PM / QoS: Add PM_QOS_MEMORY_BANDWIDTH class (diff) | |
download | linux-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.c | 27 |
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(); |