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author | 2022-12-19 23:46:16 +0800 | |
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committer | 2022-12-30 19:57:38 +0100 | |
commit | d91a4714e54e4ad4d6fe795339aae329f53b2217 (patch) | |
tree | f4ea52af9d1fac278fc66adf054938ec9cea4c97 | |
parent | thermal/intel: Introduce Intel TCC library (diff) | |
download | linux-d91a4714e54e4ad4d6fe795339aae329f53b2217.tar.gz linux-d91a4714e54e4ad4d6fe795339aae329f53b2217.tar.bz2 linux-d91a4714e54e4ad4d6fe795339aae329f53b2217.zip |
thermal/int340x/processor_thermal: Use Intel TCC library
Cleanup the code by using Intel TCC library for TCC (Thermal Control
Circuitry) MSR access.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r-- | drivers/thermal/intel/int340x_thermal/Kconfig | 1 | ||||
-rw-r--r-- | drivers/thermal/intel/int340x_thermal/processor_thermal_device.c | 119 |
2 files changed, 22 insertions, 98 deletions
diff --git a/drivers/thermal/intel/int340x_thermal/Kconfig b/drivers/thermal/intel/int340x_thermal/Kconfig index 5d046de96a5d..0f511917e0e1 100644 --- a/drivers/thermal/intel/int340x_thermal/Kconfig +++ b/drivers/thermal/intel/int340x_thermal/Kconfig @@ -10,6 +10,7 @@ config INT340X_THERMAL select ACPI_THERMAL_REL select ACPI_FAN select INTEL_SOC_DTS_IOSF_CORE + select INTEL_TCC select PROC_THERMAL_MMIO_RAPL if POWERCAP help Newer laptops and tablets that use ACPI may have thermal sensors and diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c index a8d98f1bd6c6..a2ea22f2bffd 100644 --- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c @@ -4,6 +4,7 @@ * Copyright (c) 2014, Intel Corporation. */ #include <linux/acpi.h> +#include <linux/intel_tcc.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> @@ -68,54 +69,17 @@ static const struct attribute_group power_limit_attribute_group = { .name = "power_limits" }; -static int tcc_get_offset(void) -{ - u64 val; - int err; - - err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val); - if (err) - return err; - - return (val >> 24) & 0x3f; -} - static ssize_t tcc_offset_degree_celsius_show(struct device *dev, struct device_attribute *attr, char *buf) { - int tcc; - - tcc = tcc_get_offset(); - if (tcc < 0) - return tcc; + int offset; - return sprintf(buf, "%d\n", tcc); -} - -static int tcc_offset_update(unsigned int tcc) -{ - u64 val; - int err; - - if (tcc > 63) - return -EINVAL; - - err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val); - if (err) - return err; - - if (val & BIT(31)) - return -EPERM; - - val &= ~GENMASK_ULL(29, 24); - val |= (tcc & 0x3f) << 24; - - err = wrmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, val); - if (err) - return err; + offset = intel_tcc_get_offset(-1); + if (offset < 0) + return offset; - return 0; + return sprintf(buf, "%d\n", offset); } static ssize_t tcc_offset_degree_celsius_store(struct device *dev, @@ -136,7 +100,7 @@ static ssize_t tcc_offset_degree_celsius_store(struct device *dev, if (kstrtouint(buf, 0, &tcc)) return -EINVAL; - err = tcc_offset_update(tcc); + err = intel_tcc_set_offset(-1, tcc); if (err) return err; @@ -145,66 +109,25 @@ static ssize_t tcc_offset_degree_celsius_store(struct device *dev, static DEVICE_ATTR_RW(tcc_offset_degree_celsius); -static int stored_tjmax; /* since it is fixed, we can have local storage */ - -static int get_tjmax(void) -{ - u32 eax, edx; - u32 val; - int err; - - err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx); - if (err) - return err; - - val = (eax >> 16) & 0xff; - if (val) - return val; - - return -EINVAL; -} - -static int read_temp_msr(int *temp) +static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone, + int *temp) { int cpu; - u32 eax, edx; - int err; - unsigned long curr_temp_off = 0; + int curr_temp; *temp = 0; for_each_online_cpu(cpu) { - err = rdmsr_safe_on_cpu(cpu, MSR_IA32_THERM_STATUS, &eax, - &edx); - if (err) - goto err_ret; - else { - if (eax & 0x80000000) { - curr_temp_off = (eax >> 16) & 0x7f; - if (!*temp || curr_temp_off < *temp) - *temp = curr_temp_off; - } else { - err = -EINVAL; - goto err_ret; - } - } + curr_temp = intel_tcc_get_temp(cpu, false); + if (curr_temp < 0) + return curr_temp; + if (!*temp || curr_temp > *temp) + *temp = curr_temp; } - return 0; -err_ret: - return err; -} - -static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone, - int *temp) -{ - int ret; - - ret = read_temp_msr(temp); - if (!ret) - *temp = (stored_tjmax - *temp) * 1000; + *temp *= 1000; - return ret; + return 0; } static struct thermal_zone_device_ops proc_thermal_local_ops = { @@ -302,8 +225,7 @@ int proc_thermal_add(struct device *dev, struct proc_thermal_device *proc_priv) status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp); if (ACPI_FAILURE(status)) { /* there is no _TMP method, add local method */ - stored_tjmax = get_tjmax(); - if (stored_tjmax > 0) + if (intel_tcc_get_tjmax(-1) > 0) ops = &proc_thermal_local_ops; } @@ -356,7 +278,7 @@ static int tcc_offset_save = -1; int proc_thermal_suspend(struct device *dev) { - tcc_offset_save = tcc_get_offset(); + tcc_offset_save = intel_tcc_get_offset(-1); if (tcc_offset_save < 0) dev_warn(dev, "failed to save offset (%d)\n", tcc_offset_save); @@ -373,7 +295,7 @@ int proc_thermal_resume(struct device *dev) /* Do not update if saving failed */ if (tcc_offset_save >= 0) - tcc_offset_update(tcc_offset_save); + intel_tcc_set_offset(-1, tcc_offset_save); return 0; } @@ -460,6 +382,7 @@ void proc_thermal_mmio_remove(struct pci_dev *pdev, struct proc_thermal_device * } EXPORT_SYMBOL_GPL(proc_thermal_mmio_remove); +MODULE_IMPORT_NS(INTEL_TCC); MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver"); MODULE_LICENSE("GPL v2"); |