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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * processor_thermal_device.c4 * Copyright (c) 2014, Intel Corporation.5 */6#include <linux/acpi.h>7#include <linux/intel_tcc.h>8#include <linux/kernel.h>9#include <linux/module.h>10#include <linux/pci.h>11#include <linux/thermal.h>12#include "int340x_thermal_zone.h"13#include "processor_thermal_device.h"14#include "../intel_soc_dts_iosf.h"15 16#define DRV_NAME "proc_thermal"17 18#define POWER_LIMIT_SHOW(index, suffix) \19static ssize_t power_limit_##index##_##suffix##_show(struct device *dev, \20 struct device_attribute *attr, \21 char *buf) \22{ \23 struct proc_thermal_device *proc_dev = dev_get_drvdata(dev); \24 \25 return sprintf(buf, "%lu\n",\26 (unsigned long)proc_dev->power_limits[index].suffix * 1000); \27}28 29static ssize_t power_floor_status_show(struct device *dev,30 struct device_attribute *attr,31 char *buf)32{33 struct proc_thermal_device *proc_dev = dev_get_drvdata(dev);34 int ret;35 36 ret = proc_thermal_read_power_floor_status(proc_dev);37 38 return sysfs_emit(buf, "%d\n", ret);39}40 41static ssize_t power_floor_enable_show(struct device *dev,42 struct device_attribute *attr,43 char *buf)44{45 struct proc_thermal_device *proc_dev = dev_get_drvdata(dev);46 bool ret;47 48 ret = proc_thermal_power_floor_get_state(proc_dev);49 50 return sysfs_emit(buf, "%d\n", ret);51}52 53static ssize_t power_floor_enable_store(struct device *dev,54 struct device_attribute *attr,55 const char *buf, size_t count)56{57 struct proc_thermal_device *proc_dev = dev_get_drvdata(dev);58 u8 state;59 int ret;60 61 if (kstrtou8(buf, 0, &state))62 return -EINVAL;63 64 ret = proc_thermal_power_floor_set_state(proc_dev, !!state);65 if (ret)66 return ret;67 68 return count;69}70 71POWER_LIMIT_SHOW(0, min_uw)72POWER_LIMIT_SHOW(0, max_uw)73POWER_LIMIT_SHOW(0, step_uw)74POWER_LIMIT_SHOW(0, tmin_us)75POWER_LIMIT_SHOW(0, tmax_us)76 77POWER_LIMIT_SHOW(1, min_uw)78POWER_LIMIT_SHOW(1, max_uw)79POWER_LIMIT_SHOW(1, step_uw)80POWER_LIMIT_SHOW(1, tmin_us)81POWER_LIMIT_SHOW(1, tmax_us)82 83static DEVICE_ATTR_RO(power_limit_0_min_uw);84static DEVICE_ATTR_RO(power_limit_0_max_uw);85static DEVICE_ATTR_RO(power_limit_0_step_uw);86static DEVICE_ATTR_RO(power_limit_0_tmin_us);87static DEVICE_ATTR_RO(power_limit_0_tmax_us);88 89static DEVICE_ATTR_RO(power_limit_1_min_uw);90static DEVICE_ATTR_RO(power_limit_1_max_uw);91static DEVICE_ATTR_RO(power_limit_1_step_uw);92static DEVICE_ATTR_RO(power_limit_1_tmin_us);93static DEVICE_ATTR_RO(power_limit_1_tmax_us);94 95static DEVICE_ATTR_RO(power_floor_status);96static DEVICE_ATTR_RW(power_floor_enable);97 98static struct attribute *power_limit_attrs[] = {99 &dev_attr_power_limit_0_min_uw.attr,100 &dev_attr_power_limit_1_min_uw.attr,101 &dev_attr_power_limit_0_max_uw.attr,102 &dev_attr_power_limit_1_max_uw.attr,103 &dev_attr_power_limit_0_step_uw.attr,104 &dev_attr_power_limit_1_step_uw.attr,105 &dev_attr_power_limit_0_tmin_us.attr,106 &dev_attr_power_limit_1_tmin_us.attr,107 &dev_attr_power_limit_0_tmax_us.attr,108 &dev_attr_power_limit_1_tmax_us.attr,109 &dev_attr_power_floor_status.attr,110 &dev_attr_power_floor_enable.attr,111 NULL112};113 114static umode_t power_limit_attr_visible(struct kobject *kobj, struct attribute *attr, int unused)115{116 struct device *dev = kobj_to_dev(kobj);117 struct proc_thermal_device *proc_dev;118 119 if (attr != &dev_attr_power_floor_status.attr && attr != &dev_attr_power_floor_enable.attr)120 return attr->mode;121 122 proc_dev = dev_get_drvdata(dev);123 if (!proc_dev || !(proc_dev->mmio_feature_mask & PROC_THERMAL_FEATURE_POWER_FLOOR))124 return 0;125 126 return attr->mode;127}128 129static const struct attribute_group power_limit_attribute_group = {130 .attrs = power_limit_attrs,131 .name = "power_limits",132 .is_visible = power_limit_attr_visible,133};134 135static ssize_t tcc_offset_degree_celsius_show(struct device *dev,136 struct device_attribute *attr,137 char *buf)138{139 int offset;140 141 offset = intel_tcc_get_offset(-1);142 if (offset < 0)143 return offset;144 145 return sprintf(buf, "%d\n", offset);146}147 148static ssize_t tcc_offset_degree_celsius_store(struct device *dev,149 struct device_attribute *attr, const char *buf,150 size_t count)151{152 unsigned int tcc;153 u64 val;154 int err;155 156 err = rdmsrl_safe(MSR_PLATFORM_INFO, &val);157 if (err)158 return err;159 160 if (!(val & BIT(30)))161 return -EACCES;162 163 if (kstrtouint(buf, 0, &tcc))164 return -EINVAL;165 166 err = intel_tcc_set_offset(-1, tcc);167 if (err)168 return err;169 170 return count;171}172 173static DEVICE_ATTR_RW(tcc_offset_degree_celsius);174 175static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,176 int *temp)177{178 int cpu;179 int curr_temp, ret;180 181 *temp = 0;182 183 for_each_online_cpu(cpu) {184 ret = intel_tcc_get_temp(cpu, &curr_temp, false);185 if (ret < 0)186 return ret;187 if (!*temp || curr_temp > *temp)188 *temp = curr_temp;189 }190 191 *temp *= 1000;192 193 return 0;194}195 196static int proc_thermal_read_ppcc(struct proc_thermal_device *proc_priv)197{198 int i;199 acpi_status status;200 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };201 union acpi_object *elements, *ppcc;202 union acpi_object *p;203 int ret = 0;204 205 status = acpi_evaluate_object(proc_priv->adev->handle, "PPCC",206 NULL, &buf);207 if (ACPI_FAILURE(status))208 return -ENODEV;209 210 p = buf.pointer;211 if (!p || (p->type != ACPI_TYPE_PACKAGE)) {212 dev_err(proc_priv->dev, "Invalid PPCC data\n");213 ret = -EFAULT;214 goto free_buffer;215 }216 217 if (!p->package.count) {218 dev_err(proc_priv->dev, "Invalid PPCC package size\n");219 ret = -EFAULT;220 goto free_buffer;221 }222 223 for (i = 0; i < min((int)p->package.count - 1, 2); ++i) {224 elements = &(p->package.elements[i+1]);225 if (elements->type != ACPI_TYPE_PACKAGE ||226 elements->package.count != 6) {227 ret = -EFAULT;228 goto free_buffer;229 }230 ppcc = elements->package.elements;231 proc_priv->power_limits[i].index = ppcc[0].integer.value;232 proc_priv->power_limits[i].min_uw = ppcc[1].integer.value;233 proc_priv->power_limits[i].max_uw = ppcc[2].integer.value;234 proc_priv->power_limits[i].tmin_us = ppcc[3].integer.value;235 proc_priv->power_limits[i].tmax_us = ppcc[4].integer.value;236 proc_priv->power_limits[i].step_uw = ppcc[5].integer.value;237 }238 239free_buffer:240 kfree(buf.pointer);241 242 return ret;243}244 245#define PROC_POWER_CAPABILITY_CHANGED 0x83246static void proc_thermal_notify(acpi_handle handle, u32 event, void *data)247{248 struct proc_thermal_device *proc_priv = data;249 250 if (!proc_priv)251 return;252 253 switch (event) {254 case PROC_POWER_CAPABILITY_CHANGED:255 proc_thermal_read_ppcc(proc_priv);256 int340x_thermal_zone_device_update(proc_priv->int340x_zone,257 THERMAL_DEVICE_POWER_CAPABILITY_CHANGED);258 break;259 default:260 dev_dbg(proc_priv->dev, "Unsupported event [0x%x]\n", event);261 break;262 }263}264 265int proc_thermal_add(struct device *dev, struct proc_thermal_device *proc_priv)266{267 struct acpi_device *adev;268 acpi_status status;269 unsigned long long tmp;270 int (*get_temp) (struct thermal_zone_device *, int *) = NULL;271 int ret;272 273 adev = ACPI_COMPANION(dev);274 if (!adev)275 return -ENODEV;276 277 proc_priv->dev = dev;278 proc_priv->adev = adev;279 280 ret = proc_thermal_read_ppcc(proc_priv);281 if (ret)282 return ret;283 284 status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp);285 if (ACPI_FAILURE(status)) {286 /* there is no _TMP method, add local method */287 if (intel_tcc_get_tjmax(-1) > 0)288 get_temp = proc_thermal_get_zone_temp;289 }290 291 proc_priv->int340x_zone = int340x_thermal_zone_add(adev, get_temp);292 if (IS_ERR(proc_priv->int340x_zone)) {293 return PTR_ERR(proc_priv->int340x_zone);294 } else295 ret = 0;296 297 ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,298 proc_thermal_notify,299 (void *)proc_priv);300 if (ret)301 goto remove_zone;302 303 ret = sysfs_create_file(&dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr);304 if (ret)305 goto remove_notify;306 307 ret = sysfs_create_group(&dev->kobj, &power_limit_attribute_group);308 if (ret) {309 sysfs_remove_file(&dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr);310 goto remove_notify;311 }312 313 return 0;314 315remove_notify:316 acpi_remove_notify_handler(adev->handle,317 ACPI_DEVICE_NOTIFY, proc_thermal_notify);318remove_zone:319 int340x_thermal_zone_remove(proc_priv->int340x_zone);320 321 return ret;322}323EXPORT_SYMBOL_GPL(proc_thermal_add);324 325void proc_thermal_remove(struct proc_thermal_device *proc_priv)326{327 acpi_remove_notify_handler(proc_priv->adev->handle,328 ACPI_DEVICE_NOTIFY, proc_thermal_notify);329 int340x_thermal_zone_remove(proc_priv->int340x_zone);330 sysfs_remove_file(&proc_priv->dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr);331 sysfs_remove_group(&proc_priv->dev->kobj,332 &power_limit_attribute_group);333}334EXPORT_SYMBOL_GPL(proc_thermal_remove);335 336static int tcc_offset_save = -1;337 338int proc_thermal_suspend(struct device *dev)339{340 tcc_offset_save = intel_tcc_get_offset(-1);341 if (tcc_offset_save < 0)342 dev_warn(dev, "failed to save offset (%d)\n", tcc_offset_save);343 344 return 0;345}346EXPORT_SYMBOL_GPL(proc_thermal_suspend);347 348int proc_thermal_resume(struct device *dev)349{350 struct proc_thermal_device *proc_dev;351 352 proc_dev = dev_get_drvdata(dev);353 proc_thermal_read_ppcc(proc_dev);354 355 /* Do not update if saving failed */356 if (tcc_offset_save >= 0)357 intel_tcc_set_offset(-1, tcc_offset_save);358 359 return 0;360}361EXPORT_SYMBOL_GPL(proc_thermal_resume);362 363#define MCHBAR 0364 365static int proc_thermal_set_mmio_base(struct pci_dev *pdev, struct proc_thermal_device *proc_priv)366{367 int ret;368 369 ret = pcim_iomap_regions(pdev, 1 << MCHBAR, DRV_NAME);370 if (ret) {371 dev_err(&pdev->dev, "cannot reserve PCI memory region\n");372 return -ENOMEM;373 }374 375 proc_priv->mmio_base = pcim_iomap_table(pdev)[MCHBAR];376 377 return 0;378}379 380int proc_thermal_mmio_add(struct pci_dev *pdev,381 struct proc_thermal_device *proc_priv,382 kernel_ulong_t feature_mask)383{384 int ret;385 386 proc_priv->mmio_feature_mask = feature_mask;387 388 if (feature_mask) {389 ret = proc_thermal_set_mmio_base(pdev, proc_priv);390 if (ret)391 return ret;392 }393 394 if (feature_mask & PROC_THERMAL_FEATURE_RAPL) {395 ret = proc_thermal_rapl_add(pdev, proc_priv);396 if (ret) {397 dev_err(&pdev->dev, "failed to add RAPL MMIO interface\n");398 return ret;399 }400 }401 402 if (feature_mask & PROC_THERMAL_FEATURE_FIVR ||403 feature_mask & PROC_THERMAL_FEATURE_DVFS ||404 feature_mask & PROC_THERMAL_FEATURE_DLVR) {405 ret = proc_thermal_rfim_add(pdev, proc_priv);406 if (ret) {407 dev_err(&pdev->dev, "failed to add RFIM interface\n");408 goto err_rem_rapl;409 }410 }411 412 if (feature_mask & PROC_THERMAL_FEATURE_WT_REQ) {413 ret = proc_thermal_wt_req_add(pdev, proc_priv);414 if (ret) {415 dev_err(&pdev->dev, "failed to add MBOX interface\n");416 goto err_rem_rfim;417 }418 } else if (feature_mask & PROC_THERMAL_FEATURE_WT_HINT) {419 ret = proc_thermal_wt_hint_add(pdev, proc_priv);420 if (ret) {421 dev_err(&pdev->dev, "failed to add WT Hint\n");422 goto err_rem_rfim;423 }424 }425 426 return 0;427 428err_rem_rfim:429 proc_thermal_rfim_remove(pdev);430err_rem_rapl:431 proc_thermal_rapl_remove();432 433 return ret;434}435EXPORT_SYMBOL_GPL(proc_thermal_mmio_add);436 437void proc_thermal_mmio_remove(struct pci_dev *pdev, struct proc_thermal_device *proc_priv)438{439 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_RAPL)440 proc_thermal_rapl_remove();441 442 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_FIVR ||443 proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_DVFS ||444 proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_DLVR)445 proc_thermal_rfim_remove(pdev);446 447 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_POWER_FLOOR)448 proc_thermal_power_floor_set_state(proc_priv, false);449 450 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_WT_REQ)451 proc_thermal_wt_req_remove(pdev);452 else if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_WT_HINT)453 proc_thermal_wt_hint_remove(pdev);454}455EXPORT_SYMBOL_GPL(proc_thermal_mmio_remove);456 457MODULE_IMPORT_NS(INTEL_TCC);458MODULE_IMPORT_NS(INT340X_THERMAL);459MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");460MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");461MODULE_LICENSE("GPL v2");462