diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-03-21 12:51:36 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-03-21 12:51:36 -0700 |
commit | 3d7a6db537e98c8b43fb303444c5aeaca7a804f2 (patch) | |
tree | 0d2c5ca58be6751ae15eb6a4c9ad044ee64cfdc6 | |
parent | 97448d5b3ddc6941a93860bc4ed9642264b4b4bf (diff) | |
parent | 9c86286a60b28bd25cb1c70eb2aba34f182d1063 (diff) |
Merge tag 'pm+acpi-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI fixes from Rafael Wysocki:
"These are fixes for recent regressions (PCI/ACPI resources and at91
RTC locking), a stable-candidate powercap RAPL driver fix and two ARM
cpuidle fixes (one stable-candidate too).
Specifics:
- Revert a recent PCI commit related to IRQ resources management that
introduced a regression for drivers attempting to bind to devices
whose previous drivers did not balance pci_enable_device() and
pci_disable_device() as expected (Rafael J Wysocki).
- Fix a deadlock in at91_rtc_interrupt() introduced by a typo in a
recent commit related to wakeup interrupt handling (Dan Carpenter).
- Allow the power capping RAPL (Running-Average Power Limit) driver
to use different energy units for domains within one CPU package
which is necessary to handle Intel Haswell EP processors correctly
(Jacob Pan).
- Improve the cpuidle mvebu driver's handling of Armada XP SoCs by
updating the target residency and exit latency numbers for those
chips (Sebastien Rannou).
- Prevent the cpuidle mvebu driver from calling cpu_pm_enter() twice
in a row before cpu_pm_exit() is called on the same CPU which
breaks the core's assumptions regarding the usage of those
functions (Gregory Clement)"
* tag 'pm+acpi-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "x86/PCI: Refine the way to release PCI IRQ resources"
rtc: at91rm9200: double locking bug in at91_rtc_interrupt()
powercap / RAPL: handle domains with different energy units
cpuidle: mvebu: Update cpuidle thresholds for Armada XP SOCs
cpuidle: mvebu: Fix the CPU PM notifier usage
-rw-r--r-- | arch/x86/include/asm/pci_x86.h | 2 | ||||
-rw-r--r-- | arch/x86/pci/common.c | 34 | ||||
-rw-r--r-- | arch/x86/pci/intel_mid_pci.c | 4 | ||||
-rw-r--r-- | arch/x86/pci/irq.c | 15 | ||||
-rw-r--r-- | drivers/acpi/pci_irq.c | 9 | ||||
-rw-r--r-- | drivers/cpuidle/cpuidle-mvebu-v7.c | 12 | ||||
-rw-r--r-- | drivers/powercap/intel_rapl.c | 54 | ||||
-rw-r--r-- | drivers/rtc/rtc-at91rm9200.c | 2 |
8 files changed, 78 insertions, 54 deletions
diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h index fa1195dae425..164e3f8d3c3d 100644 --- a/arch/x86/include/asm/pci_x86.h +++ b/arch/x86/include/asm/pci_x86.h @@ -93,6 +93,8 @@ extern raw_spinlock_t pci_config_lock; extern int (*pcibios_enable_irq)(struct pci_dev *dev); extern void (*pcibios_disable_irq)(struct pci_dev *dev); +extern bool mp_should_keep_irq(struct device *dev); + struct pci_raw_ops { int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn, int reg, int len, u32 *val); diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index 3d2612b68694..2fb384724ebb 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -513,31 +513,6 @@ void __init pcibios_set_cache_line_size(void) } } -/* - * Some device drivers assume dev->irq won't change after calling - * pci_disable_device(). So delay releasing of IRQ resource to driver - * unbinding time. Otherwise it will break PM subsystem and drivers - * like xen-pciback etc. - */ -static int pci_irq_notifier(struct notifier_block *nb, unsigned long action, - void *data) -{ - struct pci_dev *dev = to_pci_dev(data); - - if (action != BUS_NOTIFY_UNBOUND_DRIVER) - return NOTIFY_DONE; - - if (pcibios_disable_irq) - pcibios_disable_irq(dev); - - return NOTIFY_OK; -} - -static struct notifier_block pci_irq_nb = { - .notifier_call = pci_irq_notifier, - .priority = INT_MIN, -}; - int __init pcibios_init(void) { if (!raw_pci_ops) { @@ -550,9 +525,6 @@ int __init pcibios_init(void) if (pci_bf_sort >= pci_force_bf) pci_sort_breadthfirst(); - - bus_register_notifier(&pci_bus_type, &pci_irq_nb); - return 0; } @@ -711,6 +683,12 @@ int pcibios_enable_device(struct pci_dev *dev, int mask) return 0; } +void pcibios_disable_device (struct pci_dev *dev) +{ + if (!pci_dev_msi_enabled(dev) && pcibios_disable_irq) + pcibios_disable_irq(dev); +} + int pci_ext_cfg_avail(void) { if (raw_pci_ext_ops) diff --git a/arch/x86/pci/intel_mid_pci.c b/arch/x86/pci/intel_mid_pci.c index efb849323c74..852aa4c92da0 100644 --- a/arch/x86/pci/intel_mid_pci.c +++ b/arch/x86/pci/intel_mid_pci.c @@ -234,10 +234,10 @@ static int intel_mid_pci_irq_enable(struct pci_dev *dev) static void intel_mid_pci_irq_disable(struct pci_dev *dev) { - if (dev->irq_managed && dev->irq > 0) { + if (!mp_should_keep_irq(&dev->dev) && dev->irq_managed && + dev->irq > 0) { mp_unmap_irq(dev->irq); dev->irq_managed = 0; - dev->irq = 0; } } diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c index e71b3dbd87b8..5dc6ca5e1741 100644 --- a/arch/x86/pci/irq.c +++ b/arch/x86/pci/irq.c @@ -1256,9 +1256,22 @@ static int pirq_enable_irq(struct pci_dev *dev) return 0; } +bool mp_should_keep_irq(struct device *dev) +{ + if (dev->power.is_prepared) + return true; +#ifdef CONFIG_PM + if (dev->power.runtime_status == RPM_SUSPENDING) + return true; +#endif + + return false; +} + static void pirq_disable_irq(struct pci_dev *dev) { - if (io_apic_assign_pci_irqs && dev->irq_managed && dev->irq) { + if (io_apic_assign_pci_irqs && !mp_should_keep_irq(&dev->dev) && + dev->irq_managed && dev->irq) { mp_unmap_irq(dev->irq); dev->irq = 0; dev->irq_managed = 0; diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index e7f718d6918a..b1def411c0b8 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -485,6 +485,14 @@ void acpi_pci_irq_disable(struct pci_dev *dev) if (!pin || !dev->irq_managed || dev->irq <= 0) return; + /* Keep IOAPIC pin configuration when suspending */ + if (dev->dev.power.is_prepared) + return; +#ifdef CONFIG_PM + if (dev->dev.power.runtime_status == RPM_SUSPENDING) + return; +#endif + entry = acpi_pci_irq_lookup(dev, pin); if (!entry) return; @@ -505,6 +513,5 @@ void acpi_pci_irq_disable(struct pci_dev *dev) if (gsi >= 0) { acpi_unregister_gsi(gsi); dev->irq_managed = 0; - dev->irq = 0; } } diff --git a/drivers/cpuidle/cpuidle-mvebu-v7.c b/drivers/cpuidle/cpuidle-mvebu-v7.c index 38e68618513a..980151f34707 100644 --- a/drivers/cpuidle/cpuidle-mvebu-v7.c +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c @@ -37,11 +37,11 @@ static int mvebu_v7_enter_idle(struct cpuidle_device *dev, deepidle = true; ret = mvebu_v7_cpu_suspend(deepidle); + cpu_pm_exit(); + if (ret) return ret; - cpu_pm_exit(); - return index; } @@ -50,17 +50,17 @@ static struct cpuidle_driver armadaxp_idle_driver = { .states[0] = ARM_CPUIDLE_WFI_STATE, .states[1] = { .enter = mvebu_v7_enter_idle, - .exit_latency = 10, + .exit_latency = 100, .power_usage = 50, - .target_residency = 100, + .target_residency = 1000, .name = "MV CPU IDLE", .desc = "CPU power down", }, .states[2] = { .enter = mvebu_v7_enter_idle, - .exit_latency = 100, + .exit_latency = 1000, .power_usage = 5, - .target_residency = 1000, + .target_residency = 10000, .flags = MVEBU_V7_FLAG_DEEP_IDLE, .name = "MV CPU DEEP IDLE", .desc = "CPU and L2 Fabric power down", diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c index 97b5e4ee1ca4..63d4033eb683 100644 --- a/drivers/powercap/intel_rapl.c +++ b/drivers/powercap/intel_rapl.c @@ -73,7 +73,7 @@ #define TIME_WINDOW_MAX_MSEC 40000 #define TIME_WINDOW_MIN_MSEC 250 - +#define ENERGY_UNIT_SCALE 1000 /* scale from driver unit to powercap unit */ enum unit_type { ARBITRARY_UNIT, /* no translation */ POWER_UNIT, @@ -158,6 +158,7 @@ struct rapl_domain { struct rapl_power_limit rpl[NR_POWER_LIMITS]; u64 attr_map; /* track capabilities */ unsigned int state; + unsigned int domain_energy_unit; int package_id; }; #define power_zone_to_rapl_domain(_zone) \ @@ -190,6 +191,7 @@ struct rapl_defaults { void (*set_floor_freq)(struct rapl_domain *rd, bool mode); u64 (*compute_time_window)(struct rapl_package *rp, u64 val, bool to_raw); + unsigned int dram_domain_energy_unit; }; static struct rapl_defaults *rapl_defaults; @@ -227,7 +229,8 @@ static int rapl_read_data_raw(struct rapl_domain *rd, static int rapl_write_data_raw(struct rapl_domain *rd, enum rapl_primitives prim, unsigned long long value); -static u64 rapl_unit_xlate(int package, enum unit_type type, u64 value, +static u64 rapl_unit_xlate(struct rapl_domain *rd, int package, + enum unit_type type, u64 value, int to_raw); static void package_power_limit_irq_save(int package_id); @@ -305,7 +308,9 @@ static int get_energy_counter(struct powercap_zone *power_zone, u64 *energy_raw) static int get_max_energy_counter(struct powercap_zone *pcd_dev, u64 *energy) { - *energy = rapl_unit_xlate(0, ENERGY_UNIT, ENERGY_STATUS_MASK, 0); + struct rapl_domain *rd = power_zone_to_rapl_domain(pcd_dev); + + *energy = rapl_unit_xlate(rd, 0, ENERGY_UNIT, ENERGY_STATUS_MASK, 0); return 0; } @@ -639,6 +644,11 @@ static void rapl_init_domains(struct rapl_package *rp) rd->msrs[4] = MSR_DRAM_POWER_INFO; rd->rpl[0].prim_id = PL1_ENABLE; rd->rpl[0].name = pl1_name; + rd->domain_energy_unit = + rapl_defaults->dram_domain_energy_unit; + if (rd->domain_energy_unit) + pr_info("DRAM domain energy unit %dpj\n", + rd->domain_energy_unit); break; } if (mask) { @@ -648,11 +658,13 @@ static void rapl_init_domains(struct rapl_package *rp) } } -static u64 rapl_unit_xlate(int package, enum unit_type type, u64 value, +static u64 rapl_unit_xlate(struct rapl_domain *rd, int package, + enum unit_type type, u64 value, int to_raw) { u64 units = 1; struct rapl_package *rp; + u64 scale = 1; rp = find_package_by_id(package); if (!rp) @@ -663,7 +675,12 @@ static u64 rapl_unit_xlate(int package, enum unit_type type, u64 value, units = rp->power_unit; break; case ENERGY_UNIT: - units = rp->energy_unit; + scale = ENERGY_UNIT_SCALE; + /* per domain unit takes precedence */ + if (rd && rd->domain_energy_unit) + units = rd->domain_energy_unit; + else + units = rp->energy_unit; break; case TIME_UNIT: return rapl_defaults->compute_time_window(rp, value, to_raw); @@ -673,11 +690,11 @@ static u64 rapl_unit_xlate(int package, enum unit_type type, u64 value, }; if (to_raw) - return div64_u64(value, units); + return div64_u64(value, units) * scale; value *= units; - return value; + return div64_u64(value, scale); } /* in the order of enum rapl_primitives */ @@ -773,7 +790,7 @@ static int rapl_read_data_raw(struct rapl_domain *rd, final = value & rp->mask; final = final >> rp->shift; if (xlate) - *data = rapl_unit_xlate(rd->package_id, rp->unit, final, 0); + *data = rapl_unit_xlate(rd, rd->package_id, rp->unit, final, 0); else *data = final; @@ -799,7 +816,7 @@ static int rapl_write_data_raw(struct rapl_domain *rd, "failed to read msr 0x%x on cpu %d\n", msr, cpu); return -EIO; } - value = rapl_unit_xlate(rd->package_id, rp->unit, value, 1); + value = rapl_unit_xlate(rd, rd->package_id, rp->unit, value, 1); msr_val &= ~rp->mask; msr_val |= value << rp->shift; if (wrmsrl_safe_on_cpu(cpu, msr, msr_val)) { @@ -818,7 +835,7 @@ static int rapl_write_data_raw(struct rapl_domain *rd, * calculate units differ on different CPUs. * We convert the units to below format based on CPUs. * i.e. - * energy unit: microJoules : Represented in microJoules by default + * energy unit: picoJoules : Represented in picoJoules by default * power unit : microWatts : Represented in milliWatts by default * time unit : microseconds: Represented in seconds by default */ @@ -834,7 +851,7 @@ static int rapl_check_unit_core(struct rapl_package *rp, int cpu) } value = (msr_val & ENERGY_UNIT_MASK) >> ENERGY_UNIT_OFFSET; - rp->energy_unit = 1000000 / (1 << value); + rp->energy_unit = ENERGY_UNIT_SCALE * 1000000 / (1 << value); value = (msr_val & POWER_UNIT_MASK) >> POWER_UNIT_OFFSET; rp->power_unit = 1000000 / (1 << value); @@ -842,7 +859,7 @@ static int rapl_check_unit_core(struct rapl_package *rp, int cpu) value = (msr_val & TIME_UNIT_MASK) >> TIME_UNIT_OFFSET; rp->time_unit = 1000000 / (1 << value); - pr_debug("Core CPU package %d energy=%duJ, time=%dus, power=%duW\n", + pr_debug("Core CPU package %d energy=%dpJ, time=%dus, power=%duW\n", rp->id, rp->energy_unit, rp->time_unit, rp->power_unit); return 0; @@ -859,7 +876,7 @@ static int rapl_check_unit_atom(struct rapl_package *rp, int cpu) return -ENODEV; } value = (msr_val & ENERGY_UNIT_MASK) >> ENERGY_UNIT_OFFSET; - rp->energy_unit = 1 << value; + rp->energy_unit = ENERGY_UNIT_SCALE * 1 << value; value = (msr_val & POWER_UNIT_MASK) >> POWER_UNIT_OFFSET; rp->power_unit = (1 << value) * 1000; @@ -867,7 +884,7 @@ static int rapl_check_unit_atom(struct rapl_package *rp, int cpu) value = (msr_val & TIME_UNIT_MASK) >> TIME_UNIT_OFFSET; rp->time_unit = 1000000 / (1 << value); - pr_debug("Atom package %d energy=%duJ, time=%dus, power=%duW\n", + pr_debug("Atom package %d energy=%dpJ, time=%dus, power=%duW\n", rp->id, rp->energy_unit, rp->time_unit, rp->power_unit); return 0; @@ -1017,6 +1034,13 @@ static const struct rapl_defaults rapl_defaults_core = { .compute_time_window = rapl_compute_time_window_core, }; +static const struct rapl_defaults rapl_defaults_hsw_server = { + .check_unit = rapl_check_unit_core, + .set_floor_freq = set_floor_freq_default, + .compute_time_window = rapl_compute_time_window_core, + .dram_domain_energy_unit = 15300, +}; + static const struct rapl_defaults rapl_defaults_atom = { .check_unit = rapl_check_unit_atom, .set_floor_freq = set_floor_freq_atom, @@ -1037,7 +1061,7 @@ static const struct x86_cpu_id rapl_ids[] = { RAPL_CPU(0x3a, rapl_defaults_core),/* Ivy Bridge */ RAPL_CPU(0x3c, rapl_defaults_core),/* Haswell */ RAPL_CPU(0x3d, rapl_defaults_core),/* Broadwell */ - RAPL_CPU(0x3f, rapl_defaults_core),/* Haswell */ + RAPL_CPU(0x3f, rapl_defaults_hsw_server),/* Haswell servers */ RAPL_CPU(0x45, rapl_defaults_core),/* Haswell ULT */ RAPL_CPU(0x4C, rapl_defaults_atom),/* Braswell */ RAPL_CPU(0x4A, rapl_defaults_atom),/* Tangier */ diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c index b4f7744f6751..b283a1a573b3 100644 --- a/drivers/rtc/rtc-at91rm9200.c +++ b/drivers/rtc/rtc-at91rm9200.c @@ -324,7 +324,7 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id) ret = IRQ_HANDLED; } - spin_lock(&suspended_lock); + spin_unlock(&suspended_lock); return ret; } |