Commit cd0c5bd3 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branches 'pnp', 'powercap', 'pm-runtime' and 'pm-opp' 

* pnp:
  MAINTAINERS: Remove Bjorn Helgaas as PNP maintainer
  PNP / resources: remove positive test on unsigned values

* powercap:
  powercap / RAPL: add new CPU IDs
  powercap / RAPL: further relax energy counter checks

* pm-runtime:
  PM / runtime: Update documentation to reflect the current code flow

* pm-opp:
  PM / OPP: discard duplicate OPPs
  PM / OPP: Make OPP invisible to users in Kconfig
  PM / OPP: fix incorrect OPP count handling in of_init_opp_table
parents e81a0e77 18736961 a97ac35b 4ec6a9cc 64ce8545

Documentation/power/runtime_pm.txt

+11 −9
Original line number Diff line number Diff line
@@ -665,15 +665,17 @@ The PM core does its best to reduce the probability of race conditions between 
the runtime PM and system suspend/resume (and hibernation) callbacks by carrying

out the following operations:



  * During system suspend it calls pm_runtime_get_noresume() and

    pm_runtime_barrier() for every device right before executing the

    subsystem-level .suspend() callback for it.  In addition to that it calls

    __pm_runtime_disable() with 'false' as the second argument for every device

    right before executing the subsystem-level .suspend_late() callback for it.



  * During system resume it calls pm_runtime_enable() and pm_runtime_put()

    for every device right after executing the subsystem-level .resume_early()

    callback and right after executing the subsystem-level .resume() callback

  * During system suspend pm_runtime_get_noresume() is called for every device

    right before executing the subsystem-level .prepare() callback for it and

    pm_runtime_barrier() is called for every device right before executing the

    subsystem-level .suspend() callback for it.  In addition to that the PM core

    calls  __pm_runtime_disable() with 'false' as the second argument for every

    device right before executing the subsystem-level .suspend_late() callback

    for it.



  * During system resume pm_runtime_enable() and pm_runtime_put() are called for

    every device right after executing the subsystem-level .resume_early()

    callback and right after executing the subsystem-level .complete() callback

    for it, respectively.



7. Generic subsystem callbacks

MAINTAINERS

+0 −1
Original line number Diff line number Diff line
@@ -6938,7 +6938,6 @@ F: drivers/power/ 


PNP SUPPORT

M:	Rafael J. Wysocki <rafael.j.wysocki@intel.com>

M:	Bjorn Helgaas <bhelgaas@google.com>

S:	Maintained

F:	drivers/pnp/

drivers/base/power/opp.c

+26 −5
Original line number Diff line number Diff line
@@ -394,6 +394,13 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor); 
 * to keep the integrity of the internal data structures. Callers should ensure

 * that this function is *NOT* called under RCU protection or in contexts where

 * mutex cannot be locked.

 *

 * Return:

 * 0:		On success OR

 *		Duplicate OPPs (both freq and volt are same) and opp->available

 * -EEXIST:	Freq are same and volt are different OR

 *		Duplicate OPPs (both freq and volt are same) and !opp->available

 * -ENOMEM:	Memory allocation failure

 */

int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)

{
@@ -443,15 +450,31 @@ int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt) 
	new_opp->u_volt = u_volt;

	new_opp->available = true;



	/* Insert new OPP in order of increasing frequency */

	/*

	 * Insert new OPP in order of increasing frequency

	 * and discard if already present

	 */

	head = &dev_opp->opp_list;

	list_for_each_entry_rcu(opp, &dev_opp->opp_list, node) {

		if (new_opp->rate < opp->rate)

		if (new_opp->rate <= opp->rate)

			break;

		else

			head = &opp->node;

	}



	/* Duplicate OPPs ? */

	if (new_opp->rate == opp->rate) {

		int ret = opp->available && new_opp->u_volt == opp->u_volt ?

			0 : -EEXIST;



		dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n",

			 __func__, opp->rate, opp->u_volt, opp->available,

			 new_opp->rate, new_opp->u_volt, new_opp->available);

		mutex_unlock(&dev_opp_list_lock);

		kfree(new_opp);

		return ret;

	}



	list_add_rcu(&new_opp->node, head);

	mutex_unlock(&dev_opp_list_lock);
@@ -734,11 +757,9 @@ int of_init_opp_table(struct device *dev) 
		unsigned long freq = be32_to_cpup(val++) * 1000;

		unsigned long volt = be32_to_cpup(val++);



		if (dev_pm_opp_add(dev, freq, volt)) {

		if (dev_pm_opp_add(dev, freq, volt))

			dev_warn(dev, "%s: Failed to add OPP %ld\n",

				 __func__, freq);

			continue;

		}

		nr -= 2;

	}

drivers/pnp/resource.c

+2 −2
Original line number Diff line number Diff line
@@ -360,7 +360,7 @@ int pnp_check_irq(struct pnp_dev *dev, struct resource *res) 
		return 1;



	/* check if the resource is valid */

	if (*irq < 0 || *irq > 15)

	if (*irq > 15)

		return 0;



	/* check if the resource is reserved */
@@ -424,7 +424,7 @@ int pnp_check_dma(struct pnp_dev *dev, struct resource *res) 
		return 1;



	/* check if the resource is valid */

	if (*dma < 0 || *dma == 4 || *dma > 7)

	if (*dma == 4 || *dma > 7)

		return 0;



	/* check if the resource is reserved */

drivers/powercap/intel_rapl.c

+12 −21
Original line number Diff line number Diff line
@@ -951,7 +951,9 @@ static const struct x86_cpu_id rapl_ids[] = { 
	{ X86_VENDOR_INTEL, 6, 0x2d},/* Sandy Bridge EP */

	{ X86_VENDOR_INTEL, 6, 0x37},/* Valleyview */

	{ X86_VENDOR_INTEL, 6, 0x3a},/* Ivy Bridge */

	{ X86_VENDOR_INTEL, 6, 0x45},/* Haswell */

	{ X86_VENDOR_INTEL, 6, 0x3c},/* Haswell */

	{ X86_VENDOR_INTEL, 6, 0x3d},/* Broadwell */

	{ X86_VENDOR_INTEL, 6, 0x45},/* Haswell ULT */

	/* TODO: Add more CPU IDs after testing */

	{}

};
@@ -1124,8 +1126,7 @@ err_cleanup_package: 
static int rapl_check_domain(int cpu, int domain)

{

	unsigned msr;

	u64 val1, val2 = 0;

	int retry = 0;

	u64 val = 0;



	switch (domain) {

	case RAPL_DOMAIN_PACKAGE:
@@ -1144,27 +1145,14 @@ static int rapl_check_domain(int cpu, int domain) 
		pr_err("invalid domain id %d\n", domain);

		return -EINVAL;

	}

	if (rdmsrl_safe_on_cpu(cpu, msr, &val1))

	/* make sure domain counters are available and contains non-zero

	 * values, otherwise skip it.

	 */

	if (rdmsrl_safe_on_cpu(cpu, msr, &val) || !val)

		return -ENODEV;



	/* PP1/uncore/graphics domain may not be active at the time of

	 * driver loading. So skip further checks.

	 */

	if (domain == RAPL_DOMAIN_PP1)

		return 0;

	/* energy counters roll slowly on some domains */

	while (++retry < 10) {

		usleep_range(10000, 15000);

		rdmsrl_safe_on_cpu(cpu, msr, &val2);

		if ((val1 & ENERGY_STATUS_MASK) != (val2 & ENERGY_STATUS_MASK))

	return 0;

}

	/* if energy counter does not change, report as bad domain */

	pr_info("domain %s energy ctr %llu:%llu not working, skip\n",

		rapl_domain_names[domain], val1, val2);



	return -ENODEV;

}



/* Detect active and valid domains for the given CPU, caller must

 * ensure the CPU belongs to the targeted package and CPU hotlug is disabled.
@@ -1180,6 +1168,9 @@ static int rapl_detect_domains(struct rapl_package *rp, int cpu) 
		/* use physical package id to read counters */

		if (!rapl_check_domain(cpu, i))

			rp->domain_map |= 1 << i;

		else

			pr_warn("RAPL domain %s detection failed\n",

				rapl_domain_names[i]);

	}

	rp->nr_domains = bitmap_weight(&rp->domain_map,	RAPL_DOMAIN_MAX);

	if (!rp->nr_domains) {

CRA Git | Maintained and supported by SUSTech CRA and CCSE