]> Git Repo - J-linux.git/blob - drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux...
[J-linux.git] / drivers / thermal / intel / int340x_thermal / processor_thermal_device.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * processor_thermal_device.c
4  * 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) \
19 static 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
29 POWER_LIMIT_SHOW(0, min_uw)
30 POWER_LIMIT_SHOW(0, max_uw)
31 POWER_LIMIT_SHOW(0, step_uw)
32 POWER_LIMIT_SHOW(0, tmin_us)
33 POWER_LIMIT_SHOW(0, tmax_us)
34
35 POWER_LIMIT_SHOW(1, min_uw)
36 POWER_LIMIT_SHOW(1, max_uw)
37 POWER_LIMIT_SHOW(1, step_uw)
38 POWER_LIMIT_SHOW(1, tmin_us)
39 POWER_LIMIT_SHOW(1, tmax_us)
40
41 static DEVICE_ATTR_RO(power_limit_0_min_uw);
42 static DEVICE_ATTR_RO(power_limit_0_max_uw);
43 static DEVICE_ATTR_RO(power_limit_0_step_uw);
44 static DEVICE_ATTR_RO(power_limit_0_tmin_us);
45 static DEVICE_ATTR_RO(power_limit_0_tmax_us);
46
47 static DEVICE_ATTR_RO(power_limit_1_min_uw);
48 static DEVICE_ATTR_RO(power_limit_1_max_uw);
49 static DEVICE_ATTR_RO(power_limit_1_step_uw);
50 static DEVICE_ATTR_RO(power_limit_1_tmin_us);
51 static DEVICE_ATTR_RO(power_limit_1_tmax_us);
52
53 static struct attribute *power_limit_attrs[] = {
54         &dev_attr_power_limit_0_min_uw.attr,
55         &dev_attr_power_limit_1_min_uw.attr,
56         &dev_attr_power_limit_0_max_uw.attr,
57         &dev_attr_power_limit_1_max_uw.attr,
58         &dev_attr_power_limit_0_step_uw.attr,
59         &dev_attr_power_limit_1_step_uw.attr,
60         &dev_attr_power_limit_0_tmin_us.attr,
61         &dev_attr_power_limit_1_tmin_us.attr,
62         &dev_attr_power_limit_0_tmax_us.attr,
63         &dev_attr_power_limit_1_tmax_us.attr,
64         NULL
65 };
66
67 static const struct attribute_group power_limit_attribute_group = {
68         .attrs = power_limit_attrs,
69         .name = "power_limits"
70 };
71
72 static ssize_t tcc_offset_degree_celsius_show(struct device *dev,
73                                               struct device_attribute *attr,
74                                               char *buf)
75 {
76         int offset;
77
78         offset = intel_tcc_get_offset(-1);
79         if (offset < 0)
80                 return offset;
81
82         return sprintf(buf, "%d\n", offset);
83 }
84
85 static ssize_t tcc_offset_degree_celsius_store(struct device *dev,
86                                 struct device_attribute *attr, const char *buf,
87                                 size_t count)
88 {
89         unsigned int tcc;
90         u64 val;
91         int err;
92
93         err = rdmsrl_safe(MSR_PLATFORM_INFO, &val);
94         if (err)
95                 return err;
96
97         if (!(val & BIT(30)))
98                 return -EACCES;
99
100         if (kstrtouint(buf, 0, &tcc))
101                 return -EINVAL;
102
103         err = intel_tcc_set_offset(-1, tcc);
104         if (err)
105                 return err;
106
107         return count;
108 }
109
110 static DEVICE_ATTR_RW(tcc_offset_degree_celsius);
111
112 static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
113                                          int *temp)
114 {
115         int cpu;
116         int curr_temp;
117
118         *temp = 0;
119
120         for_each_online_cpu(cpu) {
121                 curr_temp = intel_tcc_get_temp(cpu, false);
122                 if (curr_temp < 0)
123                         return curr_temp;
124                 if (!*temp || curr_temp > *temp)
125                         *temp = curr_temp;
126         }
127
128         *temp *= 1000;
129
130         return 0;
131 }
132
133 static int proc_thermal_read_ppcc(struct proc_thermal_device *proc_priv)
134 {
135         int i;
136         acpi_status status;
137         struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
138         union acpi_object *elements, *ppcc;
139         union acpi_object *p;
140         int ret = 0;
141
142         status = acpi_evaluate_object(proc_priv->adev->handle, "PPCC",
143                                       NULL, &buf);
144         if (ACPI_FAILURE(status))
145                 return -ENODEV;
146
147         p = buf.pointer;
148         if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
149                 dev_err(proc_priv->dev, "Invalid PPCC data\n");
150                 ret = -EFAULT;
151                 goto free_buffer;
152         }
153
154         if (!p->package.count) {
155                 dev_err(proc_priv->dev, "Invalid PPCC package size\n");
156                 ret = -EFAULT;
157                 goto free_buffer;
158         }
159
160         for (i = 0; i < min((int)p->package.count - 1, 2); ++i) {
161                 elements = &(p->package.elements[i+1]);
162                 if (elements->type != ACPI_TYPE_PACKAGE ||
163                     elements->package.count != 6) {
164                         ret = -EFAULT;
165                         goto free_buffer;
166                 }
167                 ppcc = elements->package.elements;
168                 proc_priv->power_limits[i].index = ppcc[0].integer.value;
169                 proc_priv->power_limits[i].min_uw = ppcc[1].integer.value;
170                 proc_priv->power_limits[i].max_uw = ppcc[2].integer.value;
171                 proc_priv->power_limits[i].tmin_us = ppcc[3].integer.value;
172                 proc_priv->power_limits[i].tmax_us = ppcc[4].integer.value;
173                 proc_priv->power_limits[i].step_uw = ppcc[5].integer.value;
174         }
175
176 free_buffer:
177         kfree(buf.pointer);
178
179         return ret;
180 }
181
182 #define PROC_POWER_CAPABILITY_CHANGED   0x83
183 static void proc_thermal_notify(acpi_handle handle, u32 event, void *data)
184 {
185         struct proc_thermal_device *proc_priv = data;
186
187         if (!proc_priv)
188                 return;
189
190         switch (event) {
191         case PROC_POWER_CAPABILITY_CHANGED:
192                 proc_thermal_read_ppcc(proc_priv);
193                 int340x_thermal_zone_device_update(proc_priv->int340x_zone,
194                                 THERMAL_DEVICE_POWER_CAPABILITY_CHANGED);
195                 break;
196         default:
197                 dev_dbg(proc_priv->dev, "Unsupported event [0x%x]\n", event);
198                 break;
199         }
200 }
201
202 int proc_thermal_add(struct device *dev, struct proc_thermal_device *proc_priv)
203 {
204         struct acpi_device *adev;
205         acpi_status status;
206         unsigned long long tmp;
207         int (*get_temp) (struct thermal_zone_device *, int *) = NULL;
208         int ret;
209
210         adev = ACPI_COMPANION(dev);
211         if (!adev)
212                 return -ENODEV;
213
214         proc_priv->dev = dev;
215         proc_priv->adev = adev;
216
217         ret = proc_thermal_read_ppcc(proc_priv);
218         if (ret)
219                 return ret;
220
221         status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp);
222         if (ACPI_FAILURE(status)) {
223                 /* there is no _TMP method, add local method */
224                 if (intel_tcc_get_tjmax(-1) > 0)
225                         get_temp = proc_thermal_get_zone_temp;
226         }
227
228         proc_priv->int340x_zone = int340x_thermal_zone_add(adev, get_temp);
229         if (IS_ERR(proc_priv->int340x_zone)) {
230                 return PTR_ERR(proc_priv->int340x_zone);
231         } else
232                 ret = 0;
233
234         ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,
235                                           proc_thermal_notify,
236                                           (void *)proc_priv);
237         if (ret)
238                 goto remove_zone;
239
240         ret = sysfs_create_file(&dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr);
241         if (ret)
242                 goto remove_notify;
243
244         ret = sysfs_create_group(&dev->kobj, &power_limit_attribute_group);
245         if (ret) {
246                 sysfs_remove_file(&dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr);
247                 goto remove_notify;
248         }
249
250         return 0;
251
252 remove_notify:
253         acpi_remove_notify_handler(adev->handle,
254                                     ACPI_DEVICE_NOTIFY, proc_thermal_notify);
255 remove_zone:
256         int340x_thermal_zone_remove(proc_priv->int340x_zone);
257
258         return ret;
259 }
260 EXPORT_SYMBOL_GPL(proc_thermal_add);
261
262 void proc_thermal_remove(struct proc_thermal_device *proc_priv)
263 {
264         acpi_remove_notify_handler(proc_priv->adev->handle,
265                                    ACPI_DEVICE_NOTIFY, proc_thermal_notify);
266         int340x_thermal_zone_remove(proc_priv->int340x_zone);
267         sysfs_remove_file(&proc_priv->dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr);
268         sysfs_remove_group(&proc_priv->dev->kobj,
269                            &power_limit_attribute_group);
270 }
271 EXPORT_SYMBOL_GPL(proc_thermal_remove);
272
273 static int tcc_offset_save = -1;
274
275 int proc_thermal_suspend(struct device *dev)
276 {
277         tcc_offset_save = intel_tcc_get_offset(-1);
278         if (tcc_offset_save < 0)
279                 dev_warn(dev, "failed to save offset (%d)\n", tcc_offset_save);
280
281         return 0;
282 }
283 EXPORT_SYMBOL_GPL(proc_thermal_suspend);
284
285 int proc_thermal_resume(struct device *dev)
286 {
287         struct proc_thermal_device *proc_dev;
288
289         proc_dev = dev_get_drvdata(dev);
290         proc_thermal_read_ppcc(proc_dev);
291
292         /* Do not update if saving failed */
293         if (tcc_offset_save >= 0)
294                 intel_tcc_set_offset(-1, tcc_offset_save);
295
296         return 0;
297 }
298 EXPORT_SYMBOL_GPL(proc_thermal_resume);
299
300 #define MCHBAR 0
301
302 static int proc_thermal_set_mmio_base(struct pci_dev *pdev, struct proc_thermal_device *proc_priv)
303 {
304         int ret;
305
306         ret = pcim_iomap_regions(pdev, 1 << MCHBAR, DRV_NAME);
307         if (ret) {
308                 dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
309                 return -ENOMEM;
310         }
311
312         proc_priv->mmio_base = pcim_iomap_table(pdev)[MCHBAR];
313
314         return 0;
315 }
316
317 int proc_thermal_mmio_add(struct pci_dev *pdev,
318                           struct proc_thermal_device *proc_priv,
319                           kernel_ulong_t feature_mask)
320 {
321         int ret;
322
323         proc_priv->mmio_feature_mask = feature_mask;
324
325         if (feature_mask) {
326                 ret = proc_thermal_set_mmio_base(pdev, proc_priv);
327                 if (ret)
328                         return ret;
329         }
330
331         if (feature_mask & PROC_THERMAL_FEATURE_RAPL) {
332                 ret = proc_thermal_rapl_add(pdev, proc_priv);
333                 if (ret) {
334                         dev_err(&pdev->dev, "failed to add RAPL MMIO interface\n");
335                         return ret;
336                 }
337         }
338
339         if (feature_mask & PROC_THERMAL_FEATURE_FIVR ||
340             feature_mask & PROC_THERMAL_FEATURE_DVFS ||
341             feature_mask & PROC_THERMAL_FEATURE_DLVR) {
342                 ret = proc_thermal_rfim_add(pdev, proc_priv);
343                 if (ret) {
344                         dev_err(&pdev->dev, "failed to add RFIM interface\n");
345                         goto err_rem_rapl;
346                 }
347         }
348
349         if (feature_mask & PROC_THERMAL_FEATURE_MBOX) {
350                 ret = proc_thermal_mbox_add(pdev, proc_priv);
351                 if (ret) {
352                         dev_err(&pdev->dev, "failed to add MBOX interface\n");
353                         goto err_rem_rfim;
354                 }
355         }
356
357         return 0;
358
359 err_rem_rfim:
360         proc_thermal_rfim_remove(pdev);
361 err_rem_rapl:
362         proc_thermal_rapl_remove();
363
364         return ret;
365 }
366 EXPORT_SYMBOL_GPL(proc_thermal_mmio_add);
367
368 void proc_thermal_mmio_remove(struct pci_dev *pdev, struct proc_thermal_device *proc_priv)
369 {
370         if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_RAPL)
371                 proc_thermal_rapl_remove();
372
373         if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_FIVR ||
374             proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_DVFS)
375                 proc_thermal_rfim_remove(pdev);
376
377         if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_MBOX)
378                 proc_thermal_mbox_remove(pdev);
379 }
380 EXPORT_SYMBOL_GPL(proc_thermal_mmio_remove);
381
382 MODULE_IMPORT_NS(INTEL_TCC);
383 MODULE_AUTHOR("Srinivas Pandruvada <[email protected]>");
384 MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
385 MODULE_LICENSE("GPL v2");
This page took 0.0541 seconds and 4 git commands to generate.