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Linux 5.4-rc5

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Merge 5.4-rc5 into android-common

Linux 5.4-rc5

Signed-off-by: Greg Kroah-Hartman <[email protected]>
Change-Id: Ib61881c64a2725c6229c26d2ce63f107b7215c47
This commit is contained in:
Greg Kroah-Hartman 2019-10-28 13:11:46 +01:00
commit 444da424c1
245 changed files with 2189 additions and 1402 deletions
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240
kernel/power/qos.c
View file

@ -650,3 +650,243 @@ static int __init pm_qos_power_init(void)
}
late_initcall(pm_qos_power_init);
/* Definitions related to the frequency QoS below. */
/**
* freq_constraints_init - Initialize frequency QoS constraints.
* @qos: Frequency QoS constraints to initialize.
*/
void freq_constraints_init(struct freq_constraints *qos)
{
struct pm_qos_constraints *c;
c = &qos->min_freq;
plist_head_init(&c->list);
c->target_value = FREQ_QOS_MIN_DEFAULT_VALUE;
c->default_value = FREQ_QOS_MIN_DEFAULT_VALUE;
c->no_constraint_value = FREQ_QOS_MIN_DEFAULT_VALUE;
c->type = PM_QOS_MAX;
c->notifiers = &qos->min_freq_notifiers;
BLOCKING_INIT_NOTIFIER_HEAD(c->notifiers);
c = &qos->max_freq;
plist_head_init(&c->list);
c->target_value = FREQ_QOS_MAX_DEFAULT_VALUE;
c->default_value = FREQ_QOS_MAX_DEFAULT_VALUE;
c->no_constraint_value = FREQ_QOS_MAX_DEFAULT_VALUE;
c->type = PM_QOS_MIN;
c->notifiers = &qos->max_freq_notifiers;
BLOCKING_INIT_NOTIFIER_HEAD(c->notifiers);
}
/**
* freq_qos_read_value - Get frequency QoS constraint for a given list.
* @qos: Constraints to evaluate.
* @type: QoS request type.
*/
s32 freq_qos_read_value(struct freq_constraints *qos,
enum freq_qos_req_type type)
{
s32 ret;
switch (type) {
case FREQ_QOS_MIN:
ret = IS_ERR_OR_NULL(qos) ?
FREQ_QOS_MIN_DEFAULT_VALUE :
pm_qos_read_value(&qos->min_freq);
break;
case FREQ_QOS_MAX:
ret = IS_ERR_OR_NULL(qos) ?
FREQ_QOS_MAX_DEFAULT_VALUE :
pm_qos_read_value(&qos->max_freq);
break;
default:
WARN_ON(1);
ret = 0;
}
return ret;
}
/**
* freq_qos_apply - Add/modify/remove frequency QoS request.
* @req: Constraint request to apply.
* @action: Action to perform (add/update/remove).
* @value: Value to assign to the QoS request.
*/
static int freq_qos_apply(struct freq_qos_request *req,
enum pm_qos_req_action action, s32 value)
{
int ret;
switch(req->type) {
case FREQ_QOS_MIN:
ret = pm_qos_update_target(&req->qos->min_freq, &req->pnode,
action, value);
break;
case FREQ_QOS_MAX:
ret = pm_qos_update_target(&req->qos->max_freq, &req->pnode,
action, value);
break;
default:
ret = -EINVAL;
}
return ret;
}
/**
* freq_qos_add_request - Insert new frequency QoS request into a given list.
* @qos: Constraints to update.
* @req: Preallocated request object.
* @type: Request type.
* @value: Request value.
*
* Insert a new entry into the @qos list of requests, recompute the effective
* QoS constraint value for that list and initialize the @req object. The
* caller needs to save that object for later use in updates and removal.
*
* Return 1 if the effective constraint value has changed, 0 if the effective
* constraint value has not changed, or a negative error code on failures.
*/
int freq_qos_add_request(struct freq_constraints *qos,
struct freq_qos_request *req,
enum freq_qos_req_type type, s32 value)
{
int ret;
if (IS_ERR_OR_NULL(qos) || !req)
return -EINVAL;
if (WARN(freq_qos_request_active(req),
"%s() called for active request\n", __func__))
return -EINVAL;
req->qos = qos;
req->type = type;
ret = freq_qos_apply(req, PM_QOS_ADD_REQ, value);
if (ret < 0) {
req->qos = NULL;
req->type = 0;
}
return ret;
}
EXPORT_SYMBOL_GPL(freq_qos_add_request);
/**
* freq_qos_update_request - Modify existing frequency QoS request.
* @req: Request to modify.
* @new_value: New request value.
*
* Update an existing frequency QoS request along with the effective constraint
* value for the list of requests it belongs to.
*
* Return 1 if the effective constraint value has changed, 0 if the effective
* constraint value has not changed, or a negative error code on failures.
*/
int freq_qos_update_request(struct freq_qos_request *req, s32 new_value)
{
if (!req)
return -EINVAL;
if (WARN(!freq_qos_request_active(req),
"%s() called for unknown object\n", __func__))
return -EINVAL;
if (req->pnode.prio == new_value)
return 0;
return freq_qos_apply(req, PM_QOS_UPDATE_REQ, new_value);
}
EXPORT_SYMBOL_GPL(freq_qos_update_request);
/**
* freq_qos_remove_request - Remove frequency QoS request from its list.
* @req: Request to remove.
*
* Remove the given frequency QoS request from the list of constraints it
* belongs to and recompute the effective constraint value for that list.
*
* Return 1 if the effective constraint value has changed, 0 if the effective
* constraint value has not changed, or a negative error code on failures.
*/
int freq_qos_remove_request(struct freq_qos_request *req)
{
if (!req)
return -EINVAL;
if (WARN(!freq_qos_request_active(req),
"%s() called for unknown object\n", __func__))
return -EINVAL;
return freq_qos_apply(req, PM_QOS_REMOVE_REQ, PM_QOS_DEFAULT_VALUE);
}
EXPORT_SYMBOL_GPL(freq_qos_remove_request);
/**
* freq_qos_add_notifier - Add frequency QoS change notifier.
* @qos: List of requests to add the notifier to.
* @type: Request type.
* @notifier: Notifier block to add.
*/
int freq_qos_add_notifier(struct freq_constraints *qos,
enum freq_qos_req_type type,
struct notifier_block *notifier)
{
int ret;
if (IS_ERR_OR_NULL(qos) || !notifier)
return -EINVAL;
switch (type) {
case FREQ_QOS_MIN:
ret = blocking_notifier_chain_register(qos->min_freq.notifiers,
notifier);
break;
case FREQ_QOS_MAX:
ret = blocking_notifier_chain_register(qos->max_freq.notifiers,
notifier);
break;
default:
WARN_ON(1);
ret = -EINVAL;
}
return ret;
}
EXPORT_SYMBOL_GPL(freq_qos_add_notifier);
/**
* freq_qos_remove_notifier - Remove frequency QoS change notifier.
* @qos: List of requests to remove the notifier from.
* @type: Request type.
* @notifier: Notifier block to remove.
*/
int freq_qos_remove_notifier(struct freq_constraints *qos,
enum freq_qos_req_type type,
struct notifier_block *notifier)
{
int ret;
if (IS_ERR_OR_NULL(qos) || !notifier)
return -EINVAL;
switch (type) {
case FREQ_QOS_MIN:
ret = blocking_notifier_chain_unregister(qos->min_freq.notifiers,
notifier);
break;
case FREQ_QOS_MAX:
ret = blocking_notifier_chain_unregister(qos->max_freq.notifiers,
notifier);
break;
default:
WARN_ON(1);
ret = -EINVAL;
}
return ret;
}
EXPORT_SYMBOL_GPL(freq_qos_remove_notifier);