Emulation/switch-linux
1
0
Fork 0
mirror of https://github.com/fail0verflow/switch-linux.git synced 2025-05-04 02:34:21 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

Merge branch 'pm-qos'

Browse source 
* pm-qos:
  PM / QoS: Add PM_QOS_MEMORY_BANDWIDTH class
This commit is contained in:
Rafael J. Wysocki 2014-10-23 23:02:36 +02:00
commit 37c72cac0e
3 changed files with 33 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
Documentation/power/pm_qos_interface.txt
View file

@ -5,7 +5,8 @@ performance expectations by drivers, subsystems and user space applications on
one of the parameters. one of the parameters.
Two different PM QoS frameworks are available: Two different PM QoS frameworks are available:
1. PM QoS classes for cpu_dma_latency, network_latency, network_throughput. 1. PM QoS classes for cpu_dma_latency, network_latency, network_throughput,
memory_bandwidth.
2. the per-device PM QoS framework provides the API to manage the per-device latency 2. the per-device PM QoS framework provides the API to manage the per-device latency
constraints and PM QoS flags. constraints and PM QoS flags.
@ -13,6 +14,7 @@ Each parameters have defined units:
* latency: usec * latency: usec
* timeout: usec * timeout: usec
* throughput: kbs (kilo bit / sec) * throughput: kbs (kilo bit / sec)
* memory bandwidth: mbs (mega bit / sec)
1. PM QoS framework 1. PM QoS framework

5
include/linux/pm_qos.h
View file

@ -15,6 +15,7 @@ enum {
PM_QOS_CPU_DMA_LATENCY, PM_QOS_CPU_DMA_LATENCY,
PM_QOS_NETWORK_LATENCY, PM_QOS_NETWORK_LATENCY,
PM_QOS_NETWORK_THROUGHPUT, PM_QOS_NETWORK_THROUGHPUT,
PM_QOS_MEMORY_BANDWIDTH,
/* insert new class ID */ /* insert new class ID */
PM_QOS_NUM_CLASSES, PM_QOS_NUM_CLASSES,
@ -32,6 +33,7 @@ enum pm_qos_flags_status {
#define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC) #define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
#define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC) #define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0 #define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0
#define PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE 0
#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE 0 #define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE 0
#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0 #define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0
#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1) #define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1)
@ -69,7 +71,8 @@ struct dev_pm_qos_request {
enum pm_qos_type { enum pm_qos_type {
PM_QOS_UNITIALIZED, PM_QOS_UNITIALIZED,
PM_QOS_MAX, /* return the largest value */ PM_QOS_MAX, /* return the largest value */
PM_QOS_MIN /* return the smallest value */ PM_QOS_MIN, /* return the smallest value */
PM_QOS_SUM /* return the sum */
}; };
/* /*

27
kernel/power/qos.c
View file

@ -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[] = { static struct pm_qos_object *pm_qos_array[] = {
&null_pm_qos, &null_pm_qos,
&cpu_dma_pm_qos, &cpu_dma_pm_qos,
&network_lat_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, 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 */ /* unlocked internal variant */
static inline int pm_qos_get_value(struct pm_qos_constraints *c) 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)) if (plist_head_empty(&c->list))
return c->no_constraint_value; 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: case PM_QOS_MAX:
return plist_last(&c->list)->prio; return plist_last(&c->list)->prio;
case PM_QOS_SUM:
plist_for_each(node, &c->list)
total_value += node->prio;
return total_value;
default: default:
/* runtime check for not using enum */ /* runtime check for not using enum */
BUG(); BUG();