diff options
Diffstat (limited to 'drivers/thermal/x86_pkg_temp_thermal.c')
| -rw-r--r-- | drivers/thermal/x86_pkg_temp_thermal.c | 81 |
1 files changed, 30 insertions, 51 deletions
diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c index f89a86f5c982..39303bcf09e3 100644 --- a/drivers/thermal/x86_pkg_temp_thermal.c +++ b/drivers/thermal/x86_pkg_temp_thermal.c @@ -139,27 +139,17 @@ static struct pkg_device *pkg_temp_thermal_get_dev(unsigned int cpu) */ static int get_tj_max(int cpu, u32 *tj_max) { - u32 eax, edx; - u32 val; + u32 eax, edx, val; int err; err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, &eax, &edx); if (err) - goto err_ret; - else { - val = (eax >> 16) & 0xff; - if (val) - *tj_max = val * 1000; - else { - err = -EINVAL; - goto err_ret; - } - } + return err; - return 0; -err_ret: - *tj_max = 0; - return err; + val = (eax >> 16) & 0xff; + *tj_max = val * 1000; + + return val ? 0 : -EINVAL; } static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp) @@ -198,7 +188,7 @@ static int sys_get_trip_temp(struct thermal_zone_device *tzd, ret = rdmsr_on_cpu(pkgdev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT, &eax, &edx); if (ret < 0) - return -EINVAL; + return ret; thres_reg_value = (eax & mask) >> shift; if (thres_reg_value) @@ -223,7 +213,7 @@ sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp) ret = rdmsr_on_cpu(pkgdev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT, &l, &h); if (ret < 0) - return -EINVAL; + return ret; if (trip) { mask = THERM_MASK_THRESHOLD1; @@ -252,9 +242,7 @@ sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp) static int sys_get_trip_type(struct thermal_zone_device *thermal, int trip, enum thermal_trip_type *type) { - *type = THERMAL_TRIP_PASSIVE; - return 0; } @@ -274,8 +262,8 @@ static bool pkg_thermal_rate_control(void) /* Enable threshold interrupt on local package/cpu */ static inline void enable_pkg_thres_interrupt(void) { - u32 l, h; u8 thres_0, thres_1; + u32 l, h; rdmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h); /* only enable/disable if it had valid threshold value */ @@ -292,20 +280,21 @@ static inline void enable_pkg_thres_interrupt(void) static inline void disable_pkg_thres_interrupt(void) { u32 l, h; + rdmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h); - wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, - l & (~THERM_INT_THRESHOLD0_ENABLE) & - (~THERM_INT_THRESHOLD1_ENABLE), h); + + l &= ~(THERM_INT_THRESHOLD0_ENABLE | THERM_INT_THRESHOLD1_ENABLE); + wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h); } static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work) { - __u64 msr_val; int cpu = smp_processor_id(); - int phy_id = topology_physical_package_id(cpu); struct pkg_device *pkgdev = pkg_temp_thermal_get_dev(cpu); + int phy_id = topology_physical_package_id(cpu); bool notify = false; unsigned long flags; + u64 msr_val, wr_val; if (!pkgdev) return; @@ -320,14 +309,9 @@ static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work) spin_unlock_irqrestore(&pkg_work_lock, flags); rdmsrl(MSR_IA32_PACKAGE_THERM_STATUS, msr_val); - if (msr_val & THERM_LOG_THRESHOLD0) { - wrmsrl(MSR_IA32_PACKAGE_THERM_STATUS, - msr_val & ~THERM_LOG_THRESHOLD0); - notify = true; - } - if (msr_val & THERM_LOG_THRESHOLD1) { - wrmsrl(MSR_IA32_PACKAGE_THERM_STATUS, - msr_val & ~THERM_LOG_THRESHOLD1); + wr_val = msr_val & ~(THERM_LOG_THRESHOLD0 | THERM_LOG_THRESHOLD1); + if (wr_val != msr_val) { + wrmsrl(MSR_IA32_PACKAGE_THERM_STATUS, wr_val); notify = true; } @@ -340,11 +324,11 @@ static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work) } } -static int pkg_thermal_notify(__u64 msr_val) +static int pkg_thermal_notify(u64 msr_val) { - unsigned long flags; int cpu = smp_processor_id(); int phy_id = topology_physical_package_id(cpu); + unsigned long flags; /* * When a package is in interrupted state, all CPU's in that package @@ -483,21 +467,17 @@ static int get_core_online(unsigned int cpu) struct pkg_device *pkgdev = pkg_temp_thermal_get_dev(cpu); struct cpuinfo_x86 *c = &cpu_data(cpu); - /* Check if there is already an instance for this package */ - if (!pkgdev) { - if (!cpu_has(c, X86_FEATURE_DTHERM) || - !cpu_has(c, X86_FEATURE_PTS)) - return -ENODEV; - if (pkg_temp_thermal_device_add(cpu)) - return -ENODEV; - } + /* Paranoia check */ + if (!cpu_has(c, X86_FEATURE_DTHERM) || !cpu_has(c, X86_FEATURE_PTS)) + return -ENODEV; INIT_DELAYED_WORK(&per_cpu(pkg_temp_thermal_threshold_work, cpu), pkg_temp_thermal_threshold_work_fn); - pr_debug("get_core_online: cpu %d successful\n", cpu); - - return 0; + /* If the package exists, nothing to do */ + if (pkgdev) + return 0; + return pkg_temp_thermal_device_add(cpu); } static void put_core_offline(unsigned int cpu) @@ -555,8 +535,8 @@ static int __init pkg_temp_thermal_init(void) platform_thermal_package_notify = pkg_thermal_notify; platform_thermal_package_rate_control = pkg_thermal_rate_control; - pkg_temp_debugfs_init(); /* Don't care if fails */ - + /* Don't care if it fails */ + pkg_temp_debugfs_init(); return 0; err_ret: @@ -566,6 +546,7 @@ err_ret: kfree(pkg_work_scheduled); return -ENODEV; } +module_init(pkg_temp_thermal_init) static void __exit pkg_temp_thermal_exit(void) { @@ -597,8 +578,6 @@ static void __exit pkg_temp_thermal_exit(void) debugfs_remove_recursive(debugfs); } - -module_init(pkg_temp_thermal_init) module_exit(pkg_temp_thermal_exit) MODULE_DESCRIPTION("X86 PKG TEMP Thermal Driver"); 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