Merge branch 'pm-qos' (37c72cac) · Commits · e / devices / android_kernel_fairphone_FP4

Documentation/power/pm_qos_interface.txt

+3 −1

Original line number	Diff line number	Diff line
		@@ -5,7 +5,8 @@ performance expectations by drivers, subsystems and user space applications on
		one of the parameters.

		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
		constraints and PM QoS flags.

		@@ -13,6 +14,7 @@ Each parameters have defined units:
		* latency: usec
		* timeout: usec
		* throughput: kbs (kilo bit / sec)
		* memory bandwidth: mbs (mega bit / sec)


		1. PM QoS framework

+4 −1

Original line number	Diff line number	Diff line
		@@ -15,6 +15,7 @@ enum {
		PM_QOS_CPU_DMA_LATENCY,
		PM_QOS_NETWORK_LATENCY,
		PM_QOS_NETWORK_THROUGHPUT,
		PM_QOS_MEMORY_BANDWIDTH,

		/* insert new class ID */
		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_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
		#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_LATENCY_TOLERANCE_DEFAULT_VALUE 0
		#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1)
		@@ -69,7 +71,8 @@ struct dev_pm_qos_request {
		enum pm_qos_type {
		PM_QOS_UNITIALIZED,
		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 */
		};

		/*

+26 −1

Original line number	Diff line number	Diff line
		@@ -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();