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6#include <linux/acpi.h>
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/pci.h>
10#include <linux/thermal.h>
11#include "int340x_thermal_zone.h"
12#include "processor_thermal_device.h"
13#include "../intel_soc_dts_iosf.h"
14
15#define DRV_NAME "proc_thermal"
16
17#define POWER_LIMIT_SHOW(index, suffix) \
18static ssize_t power_limit_##index##_##suffix##_show(struct device *dev, \
19 struct device_attribute *attr, \
20 char *buf) \
21{ \
22 struct proc_thermal_device *proc_dev = dev_get_drvdata(dev); \
23 \
24 return sprintf(buf, "%lu\n",\
25 (unsigned long)proc_dev->power_limits[index].suffix * 1000); \
26}
27
28POWER_LIMIT_SHOW(0, min_uw)
29POWER_LIMIT_SHOW(0, max_uw)
30POWER_LIMIT_SHOW(0, step_uw)
31POWER_LIMIT_SHOW(0, tmin_us)
32POWER_LIMIT_SHOW(0, tmax_us)
33
34POWER_LIMIT_SHOW(1, min_uw)
35POWER_LIMIT_SHOW(1, max_uw)
36POWER_LIMIT_SHOW(1, step_uw)
37POWER_LIMIT_SHOW(1, tmin_us)
38POWER_LIMIT_SHOW(1, tmax_us)
39
40static DEVICE_ATTR_RO(power_limit_0_min_uw);
41static DEVICE_ATTR_RO(power_limit_0_max_uw);
42static DEVICE_ATTR_RO(power_limit_0_step_uw);
43static DEVICE_ATTR_RO(power_limit_0_tmin_us);
44static DEVICE_ATTR_RO(power_limit_0_tmax_us);
45
46static DEVICE_ATTR_RO(power_limit_1_min_uw);
47static DEVICE_ATTR_RO(power_limit_1_max_uw);
48static DEVICE_ATTR_RO(power_limit_1_step_uw);
49static DEVICE_ATTR_RO(power_limit_1_tmin_us);
50static DEVICE_ATTR_RO(power_limit_1_tmax_us);
51
52static struct attribute *power_limit_attrs[] = {
53 &dev_attr_power_limit_0_min_uw.attr,
54 &dev_attr_power_limit_1_min_uw.attr,
55 &dev_attr_power_limit_0_max_uw.attr,
56 &dev_attr_power_limit_1_max_uw.attr,
57 &dev_attr_power_limit_0_step_uw.attr,
58 &dev_attr_power_limit_1_step_uw.attr,
59 &dev_attr_power_limit_0_tmin_us.attr,
60 &dev_attr_power_limit_1_tmin_us.attr,
61 &dev_attr_power_limit_0_tmax_us.attr,
62 &dev_attr_power_limit_1_tmax_us.attr,
63 NULL
64};
65
66static const struct attribute_group power_limit_attribute_group = {
67 .attrs = power_limit_attrs,
68 .name = "power_limits"
69};
70
71static int tcc_get_offset(void)
72{
73 u64 val;
74 int err;
75
76 err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
77 if (err)
78 return err;
79
80 return (val >> 24) & 0x3f;
81}
82
83static ssize_t tcc_offset_degree_celsius_show(struct device *dev,
84 struct device_attribute *attr,
85 char *buf)
86{
87 int tcc;
88
89 tcc = tcc_get_offset();
90 if (tcc < 0)
91 return tcc;
92
93 return sprintf(buf, "%d\n", tcc);
94}
95
96static int tcc_offset_update(unsigned int tcc)
97{
98 u64 val;
99 int err;
100
101 if (tcc > 63)
102 return -EINVAL;
103
104 err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
105 if (err)
106 return err;
107
108 if (val & BIT(31))
109 return -EPERM;
110
111 val &= ~GENMASK_ULL(29, 24);
112 val |= (tcc & 0x3f) << 24;
113
114 err = wrmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, val);
115 if (err)
116 return err;
117
118 return 0;
119}
120
121static ssize_t tcc_offset_degree_celsius_store(struct device *dev,
122 struct device_attribute *attr, const char *buf,
123 size_t count)
124{
125 unsigned int tcc;
126 u64 val;
127 int err;
128
129 err = rdmsrl_safe(MSR_PLATFORM_INFO, &val);
130 if (err)
131 return err;
132
133 if (!(val & BIT(30)))
134 return -EACCES;
135
136 if (kstrtouint(buf, 0, &tcc))
137 return -EINVAL;
138
139 err = tcc_offset_update(tcc);
140 if (err)
141 return err;
142
143 return count;
144}
145
146static DEVICE_ATTR_RW(tcc_offset_degree_celsius);
147
148static int stored_tjmax;
149
150static int get_tjmax(void)
151{
152 u32 eax, edx;
153 u32 val;
154 int err;
155
156 err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
157 if (err)
158 return err;
159
160 val = (eax >> 16) & 0xff;
161 if (val)
162 return val;
163
164 return -EINVAL;
165}
166
167static int read_temp_msr(int *temp)
168{
169 int cpu;
170 u32 eax, edx;
171 int err;
172 unsigned long curr_temp_off = 0;
173
174 *temp = 0;
175
176 for_each_online_cpu(cpu) {
177 err = rdmsr_safe_on_cpu(cpu, MSR_IA32_THERM_STATUS, &eax,
178 &edx);
179 if (err)
180 goto err_ret;
181 else {
182 if (eax & 0x80000000) {
183 curr_temp_off = (eax >> 16) & 0x7f;
184 if (!*temp || curr_temp_off < *temp)
185 *temp = curr_temp_off;
186 } else {
187 err = -EINVAL;
188 goto err_ret;
189 }
190 }
191 }
192
193 return 0;
194err_ret:
195 return err;
196}
197
198static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
199 int *temp)
200{
201 int ret;
202
203 ret = read_temp_msr(temp);
204 if (!ret)
205 *temp = (stored_tjmax - *temp) * 1000;
206
207 return ret;
208}
209
210static struct thermal_zone_device_ops proc_thermal_local_ops = {
211 .get_temp = proc_thermal_get_zone_temp,
212};
213
214static int proc_thermal_read_ppcc(struct proc_thermal_device *proc_priv)
215{
216 int i;
217 acpi_status status;
218 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
219 union acpi_object *elements, *ppcc;
220 union acpi_object *p;
221 int ret = 0;
222
223 status = acpi_evaluate_object(proc_priv->adev->handle, "PPCC",
224 NULL, &buf);
225 if (ACPI_FAILURE(status))
226 return -ENODEV;
227
228 p = buf.pointer;
229 if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
230 dev_err(proc_priv->dev, "Invalid PPCC data\n");
231 ret = -EFAULT;
232 goto free_buffer;
233 }
234
235 if (!p->package.count) {
236 dev_err(proc_priv->dev, "Invalid PPCC package size\n");
237 ret = -EFAULT;
238 goto free_buffer;
239 }
240
241 for (i = 0; i < min((int)p->package.count - 1, 2); ++i) {
242 elements = &(p->package.elements[i+1]);
243 if (elements->type != ACPI_TYPE_PACKAGE ||
244 elements->package.count != 6) {
245 ret = -EFAULT;
246 goto free_buffer;
247 }
248 ppcc = elements->package.elements;
249 proc_priv->power_limits[i].index = ppcc[0].integer.value;
250 proc_priv->power_limits[i].min_uw = ppcc[1].integer.value;
251 proc_priv->power_limits[i].max_uw = ppcc[2].integer.value;
252 proc_priv->power_limits[i].tmin_us = ppcc[3].integer.value;
253 proc_priv->power_limits[i].tmax_us = ppcc[4].integer.value;
254 proc_priv->power_limits[i].step_uw = ppcc[5].integer.value;
255 }
256
257free_buffer:
258 kfree(buf.pointer);
259
260 return ret;
261}
262
263#define PROC_POWER_CAPABILITY_CHANGED 0x83
264static void proc_thermal_notify(acpi_handle handle, u32 event, void *data)
265{
266 struct proc_thermal_device *proc_priv = data;
267
268 if (!proc_priv)
269 return;
270
271 switch (event) {
272 case PROC_POWER_CAPABILITY_CHANGED:
273 proc_thermal_read_ppcc(proc_priv);
274 int340x_thermal_zone_device_update(proc_priv->int340x_zone,
275 THERMAL_DEVICE_POWER_CAPABILITY_CHANGED);
276 break;
277 default:
278 dev_dbg(proc_priv->dev, "Unsupported event [0x%x]\n", event);
279 break;
280 }
281}
282
283int proc_thermal_add(struct device *dev, struct proc_thermal_device *proc_priv)
284{
285 struct acpi_device *adev;
286 acpi_status status;
287 unsigned long long tmp;
288 struct thermal_zone_device_ops *ops = NULL;
289 int ret;
290
291 adev = ACPI_COMPANION(dev);
292 if (!adev)
293 return -ENODEV;
294
295 proc_priv->dev = dev;
296 proc_priv->adev = adev;
297
298 ret = proc_thermal_read_ppcc(proc_priv);
299 if (ret)
300 return ret;
301
302 status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp);
303 if (ACPI_FAILURE(status)) {
304
305 stored_tjmax = get_tjmax();
306 if (stored_tjmax > 0)
307 ops = &proc_thermal_local_ops;
308 }
309
310 proc_priv->int340x_zone = int340x_thermal_zone_add(adev, ops);
311 if (IS_ERR(proc_priv->int340x_zone)) {
312 return PTR_ERR(proc_priv->int340x_zone);
313 } else
314 ret = 0;
315
316 ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,
317 proc_thermal_notify,
318 (void *)proc_priv);
319 if (ret)
320 goto remove_zone;
321
322 ret = sysfs_create_file(&dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr);
323 if (ret)
324 goto remove_notify;
325
326 ret = sysfs_create_group(&dev->kobj, &power_limit_attribute_group);
327 if (ret) {
328 sysfs_remove_file(&dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr);
329 goto remove_notify;
330 }
331
332 return 0;
333
334remove_notify:
335 acpi_remove_notify_handler(adev->handle,
336 ACPI_DEVICE_NOTIFY, proc_thermal_notify);
337remove_zone:
338 int340x_thermal_zone_remove(proc_priv->int340x_zone);
339
340 return ret;
341}
342EXPORT_SYMBOL_GPL(proc_thermal_add);
343
344void proc_thermal_remove(struct proc_thermal_device *proc_priv)
345{
346 acpi_remove_notify_handler(proc_priv->adev->handle,
347 ACPI_DEVICE_NOTIFY, proc_thermal_notify);
348 int340x_thermal_zone_remove(proc_priv->int340x_zone);
349 sysfs_remove_file(&proc_priv->dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr);
350 sysfs_remove_group(&proc_priv->dev->kobj,
351 &power_limit_attribute_group);
352}
353EXPORT_SYMBOL_GPL(proc_thermal_remove);
354
355static int tcc_offset_save = -1;
356
357int proc_thermal_suspend(struct device *dev)
358{
359 tcc_offset_save = tcc_get_offset();
360 if (tcc_offset_save < 0)
361 dev_warn(dev, "failed to save offset (%d)\n", tcc_offset_save);
362
363 return 0;
364}
365EXPORT_SYMBOL_GPL(proc_thermal_suspend);
366
367int proc_thermal_resume(struct device *dev)
368{
369 struct proc_thermal_device *proc_dev;
370
371 proc_dev = dev_get_drvdata(dev);
372 proc_thermal_read_ppcc(proc_dev);
373
374
375 if (tcc_offset_save >= 0)
376 tcc_offset_update(tcc_offset_save);
377
378 return 0;
379}
380EXPORT_SYMBOL_GPL(proc_thermal_resume);
381
382#define MCHBAR 0
383
384static int proc_thermal_set_mmio_base(struct pci_dev *pdev, struct proc_thermal_device *proc_priv)
385{
386 int ret;
387
388 ret = pcim_iomap_regions(pdev, 1 << MCHBAR, DRV_NAME);
389 if (ret) {
390 dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
391 return -ENOMEM;
392 }
393
394 proc_priv->mmio_base = pcim_iomap_table(pdev)[MCHBAR];
395
396 return 0;
397}
398
399int proc_thermal_mmio_add(struct pci_dev *pdev,
400 struct proc_thermal_device *proc_priv,
401 kernel_ulong_t feature_mask)
402{
403 int ret;
404
405 proc_priv->mmio_feature_mask = feature_mask;
406
407 if (feature_mask) {
408 ret = proc_thermal_set_mmio_base(pdev, proc_priv);
409 if (ret)
410 return ret;
411 }
412
413 if (feature_mask & PROC_THERMAL_FEATURE_RAPL) {
414 ret = proc_thermal_rapl_add(pdev, proc_priv);
415 if (ret) {
416 dev_err(&pdev->dev, "failed to add RAPL MMIO interface\n");
417 return ret;
418 }
419 }
420
421 if (feature_mask & PROC_THERMAL_FEATURE_FIVR ||
422 feature_mask & PROC_THERMAL_FEATURE_DVFS) {
423 ret = proc_thermal_rfim_add(pdev, proc_priv);
424 if (ret) {
425 dev_err(&pdev->dev, "failed to add RFIM interface\n");
426 goto err_rem_rapl;
427 }
428 }
429
430 if (feature_mask & PROC_THERMAL_FEATURE_MBOX) {
431 ret = proc_thermal_mbox_add(pdev, proc_priv);
432 if (ret) {
433 dev_err(&pdev->dev, "failed to add MBOX interface\n");
434 goto err_rem_rfim;
435 }
436 }
437
438 return 0;
439
440err_rem_rfim:
441 proc_thermal_rfim_remove(pdev);
442err_rem_rapl:
443 proc_thermal_rapl_remove();
444
445 return ret;
446}
447EXPORT_SYMBOL_GPL(proc_thermal_mmio_add);
448
449void proc_thermal_mmio_remove(struct pci_dev *pdev, struct proc_thermal_device *proc_priv)
450{
451 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_RAPL)
452 proc_thermal_rapl_remove();
453
454 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_FIVR ||
455 proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_DVFS)
456 proc_thermal_rfim_remove(pdev);
457
458 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_MBOX)
459 proc_thermal_mbox_remove(pdev);
460}
461EXPORT_SYMBOL_GPL(proc_thermal_mmio_remove);
462
463MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
464MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
465MODULE_LICENSE("GPL v2");
466
