1 // SPDX-License-Identifier: GPL-2.0-only
3 * Processor thermal device for newer processors
4 * Copyright (c) 2020, Intel Corporation.
7 #include <linux/acpi.h>
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/pci.h>
11 #include <linux/thermal.h>
13 #include "int340x_thermal_zone.h"
14 #include "processor_thermal_device.h"
16 #define DRV_NAME "proc_thermal_pci"
18 struct proc_thermal_pci {
20 struct proc_thermal_device *proc_priv;
21 struct thermal_zone_device *tzone;
22 struct delayed_work work;
27 enum proc_thermal_mmio_type {
28 PROC_THERMAL_MMIO_TJMAX,
29 PROC_THERMAL_MMIO_PP0_TEMP,
30 PROC_THERMAL_MMIO_PP1_TEMP,
31 PROC_THERMAL_MMIO_PKG_TEMP,
32 PROC_THERMAL_MMIO_THRES_0,
33 PROC_THERMAL_MMIO_THRES_1,
34 PROC_THERMAL_MMIO_INT_ENABLE_0,
35 PROC_THERMAL_MMIO_INT_ENABLE_1,
36 PROC_THERMAL_MMIO_INT_STATUS_0,
37 PROC_THERMAL_MMIO_INT_STATUS_1,
41 struct proc_thermal_mmio_info {
42 enum proc_thermal_mmio_type mmio_type;
48 static struct proc_thermal_mmio_info proc_thermal_mmio_info[] = {
49 { PROC_THERMAL_MMIO_TJMAX, 0x599c, 16, 0xff },
50 { PROC_THERMAL_MMIO_PP0_TEMP, 0x597c, 0, 0xff },
51 { PROC_THERMAL_MMIO_PP1_TEMP, 0x5980, 0, 0xff },
52 { PROC_THERMAL_MMIO_PKG_TEMP, 0x5978, 0, 0xff },
53 { PROC_THERMAL_MMIO_THRES_0, 0x5820, 8, 0x7F },
54 { PROC_THERMAL_MMIO_THRES_1, 0x5820, 16, 0x7F },
55 { PROC_THERMAL_MMIO_INT_ENABLE_0, 0x5820, 15, 0x01 },
56 { PROC_THERMAL_MMIO_INT_ENABLE_1, 0x5820, 23, 0x01 },
57 { PROC_THERMAL_MMIO_INT_STATUS_0, 0x7200, 6, 0x01 },
58 { PROC_THERMAL_MMIO_INT_STATUS_1, 0x7200, 8, 0x01 },
61 #define B0D4_THERMAL_NOTIFY_DELAY 1000
62 static int notify_delay_ms = B0D4_THERMAL_NOTIFY_DELAY;
64 static void proc_thermal_mmio_read(struct proc_thermal_pci *pci_info,
65 enum proc_thermal_mmio_type type,
68 *value = ioread32(((u8 __iomem *)pci_info->proc_priv->mmio_base +
69 proc_thermal_mmio_info[type].mmio_addr));
70 *value >>= proc_thermal_mmio_info[type].shift;
71 *value &= proc_thermal_mmio_info[type].mask;
74 static void proc_thermal_mmio_write(struct proc_thermal_pci *pci_info,
75 enum proc_thermal_mmio_type type,
81 current_val = ioread32(((u8 __iomem *)pci_info->proc_priv->mmio_base +
82 proc_thermal_mmio_info[type].mmio_addr));
83 mask = proc_thermal_mmio_info[type].mask << proc_thermal_mmio_info[type].shift;
86 value &= proc_thermal_mmio_info[type].mask;
87 value <<= proc_thermal_mmio_info[type].shift;
90 iowrite32(current_val, ((u8 __iomem *)pci_info->proc_priv->mmio_base +
91 proc_thermal_mmio_info[type].mmio_addr));
95 * To avoid sending two many messages to user space, we have 1 second delay.
96 * On interrupt we are disabling interrupt and enabling after 1 second.
97 * This workload function is delayed by 1 second.
99 static void proc_thermal_threshold_work_fn(struct work_struct *work)
101 struct delayed_work *delayed_work = to_delayed_work(work);
102 struct proc_thermal_pci *pci_info = container_of(delayed_work,
103 struct proc_thermal_pci, work);
104 struct thermal_zone_device *tzone = pci_info->tzone;
107 thermal_zone_device_update(tzone, THERMAL_TRIP_VIOLATED);
109 /* Enable interrupt flag */
110 proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_INT_ENABLE_0, 1);
113 static void pkg_thermal_schedule_work(struct delayed_work *work)
115 unsigned long ms = msecs_to_jiffies(notify_delay_ms);
117 schedule_delayed_work(work, ms);
120 static irqreturn_t proc_thermal_irq_handler(int irq, void *devid)
122 struct proc_thermal_pci *pci_info = devid;
125 proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_INT_STATUS_0, &status);
127 /* Disable enable interrupt flag */
128 proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_INT_ENABLE_0, 0);
129 pci_write_config_byte(pci_info->pdev, 0xdc, 0x01);
131 pkg_thermal_schedule_work(&pci_info->work);
136 static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp)
138 struct proc_thermal_pci *pci_info = tzd->devdata;
141 proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_PKG_TEMP, &_temp);
142 *temp = (unsigned long)_temp * 1000;
147 static int sys_get_trip_temp(struct thermal_zone_device *tzd,
150 struct proc_thermal_pci *pci_info = tzd->devdata;
153 proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_THRES_0, &_temp);
155 *temp = THERMAL_TEMP_INVALID;
159 proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_TJMAX, &tjmax);
160 _temp = tjmax - _temp;
161 *temp = (unsigned long)_temp * 1000;
167 static int sys_get_trip_type(struct thermal_zone_device *tzd, int trip,
168 enum thermal_trip_type *type)
170 *type = THERMAL_TRIP_PASSIVE;
175 static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp)
177 struct proc_thermal_pci *pci_info = tzd->devdata;
181 cancel_delayed_work_sync(&pci_info->work);
182 proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_INT_ENABLE_0, 0);
183 proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_THRES_0, 0);
184 thermal_zone_device_disable(tzd);
185 pci_info->stored_thres = 0;
189 proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_TJMAX, &tjmax);
190 _temp = tjmax - (temp / 1000);
194 proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_THRES_0, _temp);
195 proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_INT_ENABLE_0, 1);
197 thermal_zone_device_enable(tzd);
198 pci_info->stored_thres = temp;
203 static struct thermal_zone_device_ops tzone_ops = {
204 .get_temp = sys_get_curr_temp,
205 .get_trip_temp = sys_get_trip_temp,
206 .get_trip_type = sys_get_trip_type,
207 .set_trip_temp = sys_set_trip_temp,
210 static struct thermal_zone_params tzone_params = {
211 .governor_name = "user_space",
215 static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
217 struct proc_thermal_device *proc_priv;
218 struct proc_thermal_pci *pci_info;
219 int irq_flag = 0, irq, ret;
221 proc_priv = devm_kzalloc(&pdev->dev, sizeof(*proc_priv), GFP_KERNEL);
225 pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
229 pci_info->pdev = pdev;
230 ret = pcim_enable_device(pdev);
232 dev_err(&pdev->dev, "error: could not enable device\n");
236 pci_set_master(pdev);
238 INIT_DELAYED_WORK(&pci_info->work, proc_thermal_threshold_work_fn);
240 ret = proc_thermal_add(&pdev->dev, proc_priv);
242 dev_err(&pdev->dev, "error: proc_thermal_add, will continue\n");
243 pci_info->no_legacy = 1;
246 proc_priv->priv_data = pci_info;
247 pci_info->proc_priv = proc_priv;
248 pci_set_drvdata(pdev, proc_priv);
250 ret = proc_thermal_mmio_add(pdev, proc_priv, id->driver_data);
252 goto err_ret_thermal;
254 pci_info->tzone = thermal_zone_device_register("TCPU_PCI", 1, 1, pci_info,
256 &tzone_params, 0, 0);
257 if (IS_ERR(pci_info->tzone))
260 /* request and enable interrupt */
261 ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
263 dev_err(&pdev->dev, "Failed to allocate vectors!\n");
266 if (!pdev->msi_enabled && !pdev->msix_enabled)
267 irq_flag = IRQF_SHARED;
269 irq = pci_irq_vector(pdev, 0);
270 ret = devm_request_threaded_irq(&pdev->dev, irq,
271 proc_thermal_irq_handler, NULL,
272 irq_flag, KBUILD_MODNAME, pci_info);
274 dev_err(&pdev->dev, "Request IRQ %d failed\n", pdev->irq);
275 goto err_free_vectors;
281 pci_free_irq_vectors(pdev);
283 thermal_zone_device_unregister(pci_info->tzone);
285 proc_thermal_mmio_remove(pdev, proc_priv);
287 if (!pci_info->no_legacy)
288 proc_thermal_remove(proc_priv);
289 pci_disable_device(pdev);
294 static void proc_thermal_pci_remove(struct pci_dev *pdev)
296 struct proc_thermal_device *proc_priv = pci_get_drvdata(pdev);
297 struct proc_thermal_pci *pci_info = proc_priv->priv_data;
299 cancel_delayed_work_sync(&pci_info->work);
301 proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_THRES_0, 0);
302 proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_INT_ENABLE_0, 0);
304 devm_free_irq(&pdev->dev, pdev->irq, pci_info);
305 pci_free_irq_vectors(pdev);
307 thermal_zone_device_unregister(pci_info->tzone);
308 proc_thermal_mmio_remove(pdev, pci_info->proc_priv);
309 if (!pci_info->no_legacy)
310 proc_thermal_remove(proc_priv);
311 pci_disable_device(pdev);
314 #ifdef CONFIG_PM_SLEEP
315 static int proc_thermal_pci_resume(struct device *dev)
317 struct pci_dev *pdev = to_pci_dev(dev);
318 struct proc_thermal_device *proc_priv;
319 struct proc_thermal_pci *pci_info;
321 proc_priv = pci_get_drvdata(pdev);
322 pci_info = proc_priv->priv_data;
324 if (pci_info->stored_thres) {
325 proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_THRES_0,
326 pci_info->stored_thres / 1000);
327 proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_INT_ENABLE_0, 1);
330 if (!pci_info->no_legacy)
331 return proc_thermal_resume(dev);
336 #define proc_thermal_pci_resume NULL
339 static SIMPLE_DEV_PM_OPS(proc_thermal_pci_pm, NULL, proc_thermal_pci_resume);
341 static const struct pci_device_id proc_thermal_pci_ids[] = {
342 { PCI_DEVICE_DATA(INTEL, ADL_THERMAL, PROC_THERMAL_FEATURE_RAPL | PROC_THERMAL_FEATURE_FIVR | PROC_THERMAL_FEATURE_DVFS | PROC_THERMAL_FEATURE_MBOX) },
346 MODULE_DEVICE_TABLE(pci, proc_thermal_pci_ids);
348 static struct pci_driver proc_thermal_pci_driver = {
350 .probe = proc_thermal_pci_probe,
351 .remove = proc_thermal_pci_remove,
352 .id_table = proc_thermal_pci_ids,
353 .driver.pm = &proc_thermal_pci_pm,
356 static int __init proc_thermal_init(void)
358 return pci_register_driver(&proc_thermal_pci_driver);
361 static void __exit proc_thermal_exit(void)
363 pci_unregister_driver(&proc_thermal_pci_driver);
366 module_init(proc_thermal_init);
367 module_exit(proc_thermal_exit);
369 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
370 MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
371 MODULE_LICENSE("GPL v2");