2 * processor_thermal_device.c
3 * Copyright (c) 2014, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/pci.h>
19 #include <linux/interrupt.h>
20 #include <linux/platform_device.h>
21 #include <linux/acpi.h>
22 #include <linux/thermal.h>
23 #include "int340x_thermal_zone.h"
24 #include "../intel_soc_dts_iosf.h"
26 /* Broadwell-U/HSB thermal reporting device */
27 #define PCI_DEVICE_ID_PROC_BDW_THERMAL 0x1603
28 #define PCI_DEVICE_ID_PROC_HSB_THERMAL 0x0A03
30 /* Skylake thermal reporting device */
31 #define PCI_DEVICE_ID_PROC_SKL_THERMAL 0x1903
33 /* CannonLake thermal reporting device */
34 #define PCI_DEVICE_ID_PROC_CNL_THERMAL 0x5a03
35 #define PCI_DEVICE_ID_PROC_CFL_THERMAL 0x3E83
37 /* Braswell thermal reporting device */
38 #define PCI_DEVICE_ID_PROC_BSW_THERMAL 0x22DC
40 /* Broxton thermal reporting device */
41 #define PCI_DEVICE_ID_PROC_BXT0_THERMAL 0x0A8C
42 #define PCI_DEVICE_ID_PROC_BXT1_THERMAL 0x1A8C
43 #define PCI_DEVICE_ID_PROC_BXTX_THERMAL 0x4A8C
44 #define PCI_DEVICE_ID_PROC_BXTP_THERMAL 0x5A8C
46 /* GeminiLake thermal reporting device */
47 #define PCI_DEVICE_ID_PROC_GLK_THERMAL 0x318C
58 struct proc_thermal_device {
60 struct acpi_device *adev;
61 struct power_config power_limits[2];
62 struct int34x_thermal_zone *int340x_zone;
63 struct intel_soc_dts_sensors *soc_dts;
66 enum proc_thermal_emum_mode_type {
69 PROC_THERMAL_PLATFORM_DEV
73 * We can have only one type of enumeration, PCI or Platform,
74 * not both. So we don't need instance specific data.
76 static enum proc_thermal_emum_mode_type proc_thermal_emum_mode =
79 #define POWER_LIMIT_SHOW(index, suffix) \
80 static ssize_t power_limit_##index##_##suffix##_show(struct device *dev, \
81 struct device_attribute *attr, \
84 struct pci_dev *pci_dev; \
85 struct platform_device *pdev; \
86 struct proc_thermal_device *proc_dev; \
88 if (proc_thermal_emum_mode == PROC_THERMAL_NONE) { \
89 dev_warn(dev, "Attempted to get power limit before device was initialized!\n"); \
93 if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) { \
94 pdev = to_platform_device(dev); \
95 proc_dev = platform_get_drvdata(pdev); \
97 pci_dev = to_pci_dev(dev); \
98 proc_dev = pci_get_drvdata(pci_dev); \
100 return sprintf(buf, "%lu\n",\
101 (unsigned long)proc_dev->power_limits[index].suffix * 1000); \
104 POWER_LIMIT_SHOW(0, min_uw)
105 POWER_LIMIT_SHOW(0, max_uw)
106 POWER_LIMIT_SHOW(0, step_uw)
107 POWER_LIMIT_SHOW(0, tmin_us)
108 POWER_LIMIT_SHOW(0, tmax_us)
110 POWER_LIMIT_SHOW(1, min_uw)
111 POWER_LIMIT_SHOW(1, max_uw)
112 POWER_LIMIT_SHOW(1, step_uw)
113 POWER_LIMIT_SHOW(1, tmin_us)
114 POWER_LIMIT_SHOW(1, tmax_us)
116 static DEVICE_ATTR_RO(power_limit_0_min_uw);
117 static DEVICE_ATTR_RO(power_limit_0_max_uw);
118 static DEVICE_ATTR_RO(power_limit_0_step_uw);
119 static DEVICE_ATTR_RO(power_limit_0_tmin_us);
120 static DEVICE_ATTR_RO(power_limit_0_tmax_us);
122 static DEVICE_ATTR_RO(power_limit_1_min_uw);
123 static DEVICE_ATTR_RO(power_limit_1_max_uw);
124 static DEVICE_ATTR_RO(power_limit_1_step_uw);
125 static DEVICE_ATTR_RO(power_limit_1_tmin_us);
126 static DEVICE_ATTR_RO(power_limit_1_tmax_us);
128 static struct attribute *power_limit_attrs[] = {
129 &dev_attr_power_limit_0_min_uw.attr,
130 &dev_attr_power_limit_1_min_uw.attr,
131 &dev_attr_power_limit_0_max_uw.attr,
132 &dev_attr_power_limit_1_max_uw.attr,
133 &dev_attr_power_limit_0_step_uw.attr,
134 &dev_attr_power_limit_1_step_uw.attr,
135 &dev_attr_power_limit_0_tmin_us.attr,
136 &dev_attr_power_limit_1_tmin_us.attr,
137 &dev_attr_power_limit_0_tmax_us.attr,
138 &dev_attr_power_limit_1_tmax_us.attr,
142 static const struct attribute_group power_limit_attribute_group = {
143 .attrs = power_limit_attrs,
144 .name = "power_limits"
147 static int stored_tjmax; /* since it is fixed, we can have local storage */
149 static int get_tjmax(void)
155 err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
159 val = (eax >> 16) & 0xff;
166 static int read_temp_msr(int *temp)
171 unsigned long curr_temp_off = 0;
175 for_each_online_cpu(cpu) {
176 err = rdmsr_safe_on_cpu(cpu, MSR_IA32_THERM_STATUS, &eax,
181 if (eax & 0x80000000) {
182 curr_temp_off = (eax >> 16) & 0x7f;
183 if (!*temp || curr_temp_off < *temp)
184 *temp = curr_temp_off;
197 static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
202 ret = read_temp_msr(temp);
204 *temp = (stored_tjmax - *temp) * 1000;
209 static struct thermal_zone_device_ops proc_thermal_local_ops = {
210 .get_temp = proc_thermal_get_zone_temp,
213 static int proc_thermal_read_ppcc(struct proc_thermal_device *proc_priv)
217 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
218 union acpi_object *elements, *ppcc;
219 union acpi_object *p;
222 status = acpi_evaluate_object(proc_priv->adev->handle, "PPCC",
224 if (ACPI_FAILURE(status))
228 if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
229 dev_err(proc_priv->dev, "Invalid PPCC data\n");
234 if (!p->package.count) {
235 dev_err(proc_priv->dev, "Invalid PPCC package size\n");
240 for (i = 0; i < min((int)p->package.count - 1, 2); ++i) {
241 elements = &(p->package.elements[i+1]);
242 if (elements->type != ACPI_TYPE_PACKAGE ||
243 elements->package.count != 6) {
247 ppcc = elements->package.elements;
248 proc_priv->power_limits[i].index = ppcc[0].integer.value;
249 proc_priv->power_limits[i].min_uw = ppcc[1].integer.value;
250 proc_priv->power_limits[i].max_uw = ppcc[2].integer.value;
251 proc_priv->power_limits[i].tmin_us = ppcc[3].integer.value;
252 proc_priv->power_limits[i].tmax_us = ppcc[4].integer.value;
253 proc_priv->power_limits[i].step_uw = ppcc[5].integer.value;
262 #define PROC_POWER_CAPABILITY_CHANGED 0x83
263 static void proc_thermal_notify(acpi_handle handle, u32 event, void *data)
265 struct proc_thermal_device *proc_priv = data;
271 case PROC_POWER_CAPABILITY_CHANGED:
272 proc_thermal_read_ppcc(proc_priv);
273 int340x_thermal_zone_device_update(proc_priv->int340x_zone,
274 THERMAL_DEVICE_POWER_CAPABILITY_CHANGED);
277 dev_err(proc_priv->dev, "Unsupported event [0x%x]\n", event);
283 static int proc_thermal_add(struct device *dev,
284 struct proc_thermal_device **priv)
286 struct proc_thermal_device *proc_priv;
287 struct acpi_device *adev;
289 unsigned long long tmp;
290 struct thermal_zone_device_ops *ops = NULL;
293 adev = ACPI_COMPANION(dev);
297 proc_priv = devm_kzalloc(dev, sizeof(*proc_priv), GFP_KERNEL);
301 proc_priv->dev = dev;
302 proc_priv->adev = adev;
305 ret = proc_thermal_read_ppcc(proc_priv);
309 status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp);
310 if (ACPI_FAILURE(status)) {
311 /* there is no _TMP method, add local method */
312 stored_tjmax = get_tjmax();
313 if (stored_tjmax > 0)
314 ops = &proc_thermal_local_ops;
317 proc_priv->int340x_zone = int340x_thermal_zone_add(adev, ops);
318 if (IS_ERR(proc_priv->int340x_zone)) {
319 return PTR_ERR(proc_priv->int340x_zone);
323 ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,
332 int340x_thermal_zone_remove(proc_priv->int340x_zone);
337 static void proc_thermal_remove(struct proc_thermal_device *proc_priv)
339 acpi_remove_notify_handler(proc_priv->adev->handle,
340 ACPI_DEVICE_NOTIFY, proc_thermal_notify);
341 int340x_thermal_zone_remove(proc_priv->int340x_zone);
342 sysfs_remove_group(&proc_priv->dev->kobj,
343 &power_limit_attribute_group);
346 static int int3401_add(struct platform_device *pdev)
348 struct proc_thermal_device *proc_priv;
351 if (proc_thermal_emum_mode == PROC_THERMAL_PCI) {
352 dev_err(&pdev->dev, "error: enumerated as PCI dev\n");
356 ret = proc_thermal_add(&pdev->dev, &proc_priv);
360 platform_set_drvdata(pdev, proc_priv);
361 proc_thermal_emum_mode = PROC_THERMAL_PLATFORM_DEV;
363 dev_info(&pdev->dev, "Creating sysfs group for PROC_THERMAL_PLATFORM_DEV\n");
365 return sysfs_create_group(&pdev->dev.kobj,
366 &power_limit_attribute_group);
369 static int int3401_remove(struct platform_device *pdev)
371 proc_thermal_remove(platform_get_drvdata(pdev));
376 static irqreturn_t proc_thermal_pci_msi_irq(int irq, void *devid)
378 struct proc_thermal_device *proc_priv;
379 struct pci_dev *pdev = devid;
381 proc_priv = pci_get_drvdata(pdev);
383 intel_soc_dts_iosf_interrupt_handler(proc_priv->soc_dts);
388 static int proc_thermal_pci_probe(struct pci_dev *pdev,
389 const struct pci_device_id *unused)
391 struct proc_thermal_device *proc_priv;
394 if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) {
395 dev_err(&pdev->dev, "error: enumerated as platform dev\n");
399 ret = pci_enable_device(pdev);
401 dev_err(&pdev->dev, "error: could not enable device\n");
405 ret = proc_thermal_add(&pdev->dev, &proc_priv);
407 pci_disable_device(pdev);
411 pci_set_drvdata(pdev, proc_priv);
412 proc_thermal_emum_mode = PROC_THERMAL_PCI;
414 if (pdev->device == PCI_DEVICE_ID_PROC_BSW_THERMAL) {
416 * Enumerate additional DTS sensors available via IOSF.
417 * But we are not treating as a failure condition, if
418 * there are no aux DTSs enabled or fails. This driver
419 * already exposes sensors, which can be accessed via
420 * ACPI/MSR. So we don't want to fail for auxiliary DTSs.
422 proc_priv->soc_dts = intel_soc_dts_iosf_init(
423 INTEL_SOC_DTS_INTERRUPT_MSI, 2, 0);
425 if (!IS_ERR(proc_priv->soc_dts) && pdev->irq) {
426 ret = pci_enable_msi(pdev);
428 ret = request_threaded_irq(pdev->irq, NULL,
429 proc_thermal_pci_msi_irq,
430 IRQF_ONESHOT, "proc_thermal",
433 intel_soc_dts_iosf_exit(
435 pci_disable_msi(pdev);
436 proc_priv->soc_dts = NULL;
440 dev_err(&pdev->dev, "No auxiliary DTSs enabled\n");
443 dev_info(&pdev->dev, "Creating sysfs group for PROC_THERMAL_PCI\n");
445 return sysfs_create_group(&pdev->dev.kobj,
446 &power_limit_attribute_group);
449 static void proc_thermal_pci_remove(struct pci_dev *pdev)
451 struct proc_thermal_device *proc_priv = pci_get_drvdata(pdev);
453 if (proc_priv->soc_dts) {
454 intel_soc_dts_iosf_exit(proc_priv->soc_dts);
456 free_irq(pdev->irq, pdev);
457 pci_disable_msi(pdev);
460 proc_thermal_remove(proc_priv);
461 pci_disable_device(pdev);
464 static const struct pci_device_id proc_thermal_pci_ids[] = {
465 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BDW_THERMAL)},
466 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_HSB_THERMAL)},
467 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_SKL_THERMAL)},
468 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BSW_THERMAL)},
469 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXT0_THERMAL)},
470 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXT1_THERMAL)},
471 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXTX_THERMAL)},
472 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXTP_THERMAL)},
473 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_CNL_THERMAL)},
474 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_CFL_THERMAL)},
475 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_GLK_THERMAL)},
479 MODULE_DEVICE_TABLE(pci, proc_thermal_pci_ids);
481 static struct pci_driver proc_thermal_pci_driver = {
482 .name = "proc_thermal",
483 .probe = proc_thermal_pci_probe,
484 .remove = proc_thermal_pci_remove,
485 .id_table = proc_thermal_pci_ids,
488 static const struct acpi_device_id int3401_device_ids[] = {
492 MODULE_DEVICE_TABLE(acpi, int3401_device_ids);
494 static struct platform_driver int3401_driver = {
495 .probe = int3401_add,
496 .remove = int3401_remove,
498 .name = "int3401 thermal",
499 .acpi_match_table = int3401_device_ids,
503 static int __init proc_thermal_init(void)
507 ret = platform_driver_register(&int3401_driver);
511 ret = pci_register_driver(&proc_thermal_pci_driver);
516 static void __exit proc_thermal_exit(void)
518 platform_driver_unregister(&int3401_driver);
519 pci_unregister_driver(&proc_thermal_pci_driver);
522 module_init(proc_thermal_init);
523 module_exit(proc_thermal_exit);
525 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
526 MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
527 MODULE_LICENSE("GPL v2");