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/sysfs.h> 12 #include <linux/thermal.h> 13 #include <asm/msr.h> 14 #include "int340x_thermal_zone.h" 15 #include "processor_thermal_device.h" 16 #include "../intel_soc_dts_iosf.h" 17 18 #define DRV_NAME "proc_thermal" 19 20 #define POWER_LIMIT_SHOW(index, suffix) \ 21 static ssize_t power_limit_##index##_##suffix##_show(struct device *dev, \ 22 struct device_attribute *attr, \ 23 char *buf) \ 24 { \ 25 struct proc_thermal_device *proc_dev = dev_get_drvdata(dev); \ 26 \ 27 return sysfs_emit(buf, "%lu\n",\ 28 (unsigned long)proc_dev->power_limits[index].suffix * 1000); \ 29 } 30 31 static ssize_t power_floor_status_show(struct device *dev, 32 struct device_attribute *attr, 33 char *buf) 34 { 35 struct proc_thermal_device *proc_dev = dev_get_drvdata(dev); 36 int ret; 37 38 ret = proc_thermal_read_power_floor_status(proc_dev); 39 40 return sysfs_emit(buf, "%d\n", ret); 41 } 42 43 static ssize_t power_floor_enable_show(struct device *dev, 44 struct device_attribute *attr, 45 char *buf) 46 { 47 struct proc_thermal_device *proc_dev = dev_get_drvdata(dev); 48 bool ret; 49 50 ret = proc_thermal_power_floor_get_state(proc_dev); 51 52 return sysfs_emit(buf, "%d\n", ret); 53 } 54 55 static ssize_t power_floor_enable_store(struct device *dev, 56 struct device_attribute *attr, 57 const char *buf, size_t count) 58 { 59 struct proc_thermal_device *proc_dev = dev_get_drvdata(dev); 60 u8 state; 61 int ret; 62 63 if (kstrtou8(buf, 0, &state)) 64 return -EINVAL; 65 66 ret = proc_thermal_power_floor_set_state(proc_dev, !!state); 67 if (ret) 68 return ret; 69 70 return count; 71 } 72 73 POWER_LIMIT_SHOW(0, min_uw) 74 POWER_LIMIT_SHOW(0, max_uw) 75 POWER_LIMIT_SHOW(0, step_uw) 76 POWER_LIMIT_SHOW(0, tmin_us) 77 POWER_LIMIT_SHOW(0, tmax_us) 78 79 POWER_LIMIT_SHOW(1, min_uw) 80 POWER_LIMIT_SHOW(1, max_uw) 81 POWER_LIMIT_SHOW(1, step_uw) 82 POWER_LIMIT_SHOW(1, tmin_us) 83 POWER_LIMIT_SHOW(1, tmax_us) 84 85 static DEVICE_ATTR_RO(power_limit_0_min_uw); 86 static DEVICE_ATTR_RO(power_limit_0_max_uw); 87 static DEVICE_ATTR_RO(power_limit_0_step_uw); 88 static DEVICE_ATTR_RO(power_limit_0_tmin_us); 89 static DEVICE_ATTR_RO(power_limit_0_tmax_us); 90 91 static DEVICE_ATTR_RO(power_limit_1_min_uw); 92 static DEVICE_ATTR_RO(power_limit_1_max_uw); 93 static DEVICE_ATTR_RO(power_limit_1_step_uw); 94 static DEVICE_ATTR_RO(power_limit_1_tmin_us); 95 static DEVICE_ATTR_RO(power_limit_1_tmax_us); 96 97 static DEVICE_ATTR_RO(power_floor_status); 98 static DEVICE_ATTR_RW(power_floor_enable); 99 100 static struct attribute *power_limit_attrs[] = { 101 &dev_attr_power_limit_0_min_uw.attr, 102 &dev_attr_power_limit_1_min_uw.attr, 103 &dev_attr_power_limit_0_max_uw.attr, 104 &dev_attr_power_limit_1_max_uw.attr, 105 &dev_attr_power_limit_0_step_uw.attr, 106 &dev_attr_power_limit_1_step_uw.attr, 107 &dev_attr_power_limit_0_tmin_us.attr, 108 &dev_attr_power_limit_1_tmin_us.attr, 109 &dev_attr_power_limit_0_tmax_us.attr, 110 &dev_attr_power_limit_1_tmax_us.attr, 111 &dev_attr_power_floor_status.attr, 112 &dev_attr_power_floor_enable.attr, 113 NULL 114 }; 115 116 static umode_t power_limit_attr_visible(struct kobject *kobj, struct attribute *attr, int unused) 117 { 118 struct device *dev = kobj_to_dev(kobj); 119 struct proc_thermal_device *proc_dev; 120 121 if (attr != &dev_attr_power_floor_status.attr && attr != &dev_attr_power_floor_enable.attr) 122 return attr->mode; 123 124 proc_dev = dev_get_drvdata(dev); 125 if (!proc_dev || !(proc_dev->mmio_feature_mask & PROC_THERMAL_FEATURE_POWER_FLOOR)) 126 return 0; 127 128 return attr->mode; 129 } 130 131 static const struct attribute_group power_limit_attribute_group = { 132 .attrs = power_limit_attrs, 133 .name = "power_limits", 134 .is_visible = power_limit_attr_visible, 135 }; 136 137 static ssize_t tcc_offset_degree_celsius_show(struct device *dev, 138 struct device_attribute *attr, 139 char *buf) 140 { 141 int offset; 142 143 offset = intel_tcc_get_offset(-1); 144 if (offset < 0) 145 return offset; 146 147 return sysfs_emit(buf, "%d\n", offset); 148 } 149 150 static ssize_t tcc_offset_degree_celsius_store(struct device *dev, 151 struct device_attribute *attr, const char *buf, 152 size_t count) 153 { 154 unsigned int tcc; 155 u64 val; 156 int err; 157 158 err = rdmsrq_safe(MSR_PLATFORM_INFO, &val); 159 if (err) 160 return err; 161 162 if (!(val & BIT(30))) 163 return -EACCES; 164 165 if (kstrtouint(buf, 0, &tcc)) 166 return -EINVAL; 167 168 err = intel_tcc_set_offset(-1, tcc); 169 if (err) 170 return err; 171 172 return count; 173 } 174 175 static DEVICE_ATTR_RW(tcc_offset_degree_celsius); 176 177 static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone, 178 int *temp) 179 { 180 int cpu; 181 int curr_temp, ret; 182 183 *temp = 0; 184 185 for_each_online_cpu(cpu) { 186 ret = intel_tcc_get_temp(cpu, &curr_temp, false); 187 if (ret < 0) 188 return ret; 189 if (!*temp || curr_temp > *temp) 190 *temp = curr_temp; 191 } 192 193 *temp *= 1000; 194 195 return 0; 196 } 197 198 static int proc_thermal_read_ppcc(struct proc_thermal_device *proc_priv) 199 { 200 int i; 201 acpi_status status; 202 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; 203 union acpi_object *elements, *ppcc; 204 union acpi_object *p; 205 int ret = 0; 206 207 status = acpi_evaluate_object(proc_priv->adev->handle, "PPCC", 208 NULL, &buf); 209 if (ACPI_FAILURE(status)) 210 return -ENODEV; 211 212 p = buf.pointer; 213 if (!p || (p->type != ACPI_TYPE_PACKAGE)) { 214 dev_err(proc_priv->dev, "Invalid PPCC data\n"); 215 ret = -EFAULT; 216 goto free_buffer; 217 } 218 219 if (!p->package.count) { 220 dev_err(proc_priv->dev, "Invalid PPCC package size\n"); 221 ret = -EFAULT; 222 goto free_buffer; 223 } 224 225 for (i = 0; i < min((int)p->package.count - 1, 2); ++i) { 226 elements = &(p->package.elements[i+1]); 227 if (elements->type != ACPI_TYPE_PACKAGE || 228 elements->package.count != 6) { 229 ret = -EFAULT; 230 goto free_buffer; 231 } 232 ppcc = elements->package.elements; 233 proc_priv->power_limits[i].index = ppcc[0].integer.value; 234 proc_priv->power_limits[i].min_uw = ppcc[1].integer.value; 235 proc_priv->power_limits[i].max_uw = ppcc[2].integer.value; 236 proc_priv->power_limits[i].tmin_us = ppcc[3].integer.value; 237 proc_priv->power_limits[i].tmax_us = ppcc[4].integer.value; 238 proc_priv->power_limits[i].step_uw = ppcc[5].integer.value; 239 } 240 241 free_buffer: 242 kfree(buf.pointer); 243 244 return ret; 245 } 246 247 #define PROC_POWER_CAPABILITY_CHANGED 0x83 248 static void proc_thermal_notify(acpi_handle handle, u32 event, void *data) 249 { 250 struct proc_thermal_device *proc_priv = data; 251 252 if (!proc_priv) 253 return; 254 255 switch (event) { 256 case PROC_POWER_CAPABILITY_CHANGED: 257 proc_thermal_read_ppcc(proc_priv); 258 int340x_thermal_zone_device_update(proc_priv->int340x_zone, 259 THERMAL_DEVICE_POWER_CAPABILITY_CHANGED); 260 break; 261 default: 262 dev_dbg(proc_priv->dev, "Unsupported event [0x%x]\n", event); 263 break; 264 } 265 } 266 267 int proc_thermal_add(struct device *dev, struct proc_thermal_device *proc_priv) 268 { 269 struct acpi_device *adev; 270 acpi_status status; 271 unsigned long long tmp; 272 int (*get_temp) (struct thermal_zone_device *, int *) = NULL; 273 int ret; 274 275 adev = ACPI_COMPANION(dev); 276 if (!adev) 277 return -ENODEV; 278 279 proc_priv->dev = dev; 280 proc_priv->adev = adev; 281 282 ret = proc_thermal_read_ppcc(proc_priv); 283 if (ret) 284 return ret; 285 286 status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp); 287 if (ACPI_FAILURE(status)) { 288 /* there is no _TMP method, add local method */ 289 if (intel_tcc_get_tjmax(-1) > 0) 290 get_temp = proc_thermal_get_zone_temp; 291 } 292 293 proc_priv->int340x_zone = int340x_thermal_zone_add(adev, get_temp); 294 if (IS_ERR(proc_priv->int340x_zone)) { 295 return PTR_ERR(proc_priv->int340x_zone); 296 } else 297 ret = 0; 298 299 ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, 300 proc_thermal_notify, 301 (void *)proc_priv); 302 if (ret) 303 goto remove_zone; 304 305 ret = sysfs_create_file(&dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr); 306 if (ret) 307 goto remove_notify; 308 309 ret = sysfs_create_group(&dev->kobj, &power_limit_attribute_group); 310 if (ret) { 311 sysfs_remove_file(&dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr); 312 goto remove_notify; 313 } 314 315 return 0; 316 317 remove_notify: 318 acpi_remove_notify_handler(adev->handle, 319 ACPI_DEVICE_NOTIFY, proc_thermal_notify); 320 remove_zone: 321 int340x_thermal_zone_remove(proc_priv->int340x_zone); 322 323 return ret; 324 } 325 EXPORT_SYMBOL_GPL(proc_thermal_add); 326 327 void proc_thermal_remove(struct proc_thermal_device *proc_priv) 328 { 329 acpi_remove_notify_handler(proc_priv->adev->handle, 330 ACPI_DEVICE_NOTIFY, proc_thermal_notify); 331 int340x_thermal_zone_remove(proc_priv->int340x_zone); 332 sysfs_remove_file(&proc_priv->dev->kobj, &dev_attr_tcc_offset_degree_celsius.attr); 333 sysfs_remove_group(&proc_priv->dev->kobj, 334 &power_limit_attribute_group); 335 } 336 EXPORT_SYMBOL_GPL(proc_thermal_remove); 337 338 static int tcc_offset_save = -1; 339 340 int proc_thermal_suspend(struct device *dev) 341 { 342 struct proc_thermal_device *proc_dev; 343 344 tcc_offset_save = intel_tcc_get_offset(-1); 345 if (tcc_offset_save < 0) 346 dev_warn(dev, "failed to save offset (%d)\n", tcc_offset_save); 347 348 proc_dev = dev_get_drvdata(dev); 349 350 if (proc_dev->mmio_feature_mask & PROC_THERMAL_FEATURE_SOC_POWER_SLIDER) 351 proc_thermal_soc_power_slider_suspend(proc_dev); 352 353 return 0; 354 } 355 EXPORT_SYMBOL_GPL(proc_thermal_suspend); 356 357 int proc_thermal_resume(struct device *dev) 358 { 359 struct proc_thermal_device *proc_dev; 360 361 proc_dev = dev_get_drvdata(dev); 362 proc_thermal_read_ppcc(proc_dev); 363 364 /* Do not update if saving failed */ 365 if (tcc_offset_save >= 0) 366 intel_tcc_set_offset(-1, tcc_offset_save); 367 368 if (proc_dev->mmio_feature_mask & PROC_THERMAL_FEATURE_SOC_POWER_SLIDER) 369 proc_thermal_soc_power_slider_resume(proc_dev); 370 371 return 0; 372 } 373 EXPORT_SYMBOL_GPL(proc_thermal_resume); 374 375 #define MCHBAR 0 376 377 static int proc_thermal_set_mmio_base(struct pci_dev *pdev, struct proc_thermal_device *proc_priv) 378 { 379 int ret; 380 381 ret = pcim_iomap_regions(pdev, 1 << MCHBAR, DRV_NAME); 382 if (ret) { 383 dev_err(&pdev->dev, "cannot reserve PCI memory region\n"); 384 return -ENOMEM; 385 } 386 387 proc_priv->mmio_base = pcim_iomap_table(pdev)[MCHBAR]; 388 389 return 0; 390 } 391 392 int proc_thermal_mmio_add(struct pci_dev *pdev, 393 struct proc_thermal_device *proc_priv, 394 kernel_ulong_t feature_mask) 395 { 396 int ret; 397 398 proc_priv->mmio_feature_mask = feature_mask; 399 400 if (feature_mask) { 401 ret = proc_thermal_set_mmio_base(pdev, proc_priv); 402 if (ret) 403 return ret; 404 } 405 406 if (feature_mask & PROC_THERMAL_FEATURE_RAPL) { 407 ret = proc_thermal_rapl_add(pdev, proc_priv); 408 if (ret) { 409 dev_err(&pdev->dev, "failed to add RAPL MMIO interface\n"); 410 return ret; 411 } 412 } 413 414 if (feature_mask & PROC_THERMAL_FEATURE_PTC) { 415 ret = proc_thermal_ptc_add(pdev, proc_priv); 416 if (ret) { 417 dev_err(&pdev->dev, "failed to add PTC MMIO interface\n"); 418 goto err_rem_rapl; 419 } 420 } 421 422 if (feature_mask & PROC_THERMAL_FEATURE_FIVR || 423 feature_mask & PROC_THERMAL_FEATURE_DVFS || 424 feature_mask & PROC_THERMAL_FEATURE_DLVR) { 425 ret = proc_thermal_rfim_add(pdev, proc_priv); 426 if (ret) { 427 dev_err(&pdev->dev, "failed to add RFIM interface\n"); 428 goto err_rem_ptc; 429 } 430 } 431 432 if (feature_mask & PROC_THERMAL_FEATURE_WT_REQ) { 433 ret = proc_thermal_wt_req_add(pdev, proc_priv); 434 if (ret) { 435 dev_err(&pdev->dev, "failed to add MBOX interface\n"); 436 goto err_rem_rfim; 437 } 438 } else if (feature_mask & PROC_THERMAL_FEATURE_WT_HINT) { 439 ret = proc_thermal_wt_hint_add(pdev, proc_priv); 440 if (ret) { 441 dev_err(&pdev->dev, "failed to add WT Hint\n"); 442 goto err_rem_rfim; 443 } 444 } 445 446 if (feature_mask & PROC_THERMAL_FEATURE_SOC_POWER_SLIDER) { 447 ret = proc_thermal_soc_power_slider_add(pdev, proc_priv); 448 if (ret) { 449 dev_info(&pdev->dev, "failed to add soc power efficiency slider\n"); 450 goto err_rem_wlt; 451 } 452 } 453 454 return 0; 455 456 err_rem_wlt: 457 proc_thermal_wt_hint_remove(pdev); 458 err_rem_rfim: 459 proc_thermal_rfim_remove(pdev); 460 err_rem_ptc: 461 proc_thermal_ptc_remove(pdev); 462 err_rem_rapl: 463 proc_thermal_rapl_remove(); 464 465 return ret; 466 } 467 EXPORT_SYMBOL_GPL(proc_thermal_mmio_add); 468 469 void proc_thermal_mmio_remove(struct pci_dev *pdev, struct proc_thermal_device *proc_priv) 470 { 471 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_RAPL) 472 proc_thermal_rapl_remove(); 473 474 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_PTC) 475 proc_thermal_ptc_remove(pdev); 476 477 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_FIVR || 478 proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_DVFS || 479 proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_DLVR) 480 proc_thermal_rfim_remove(pdev); 481 482 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_POWER_FLOOR) 483 proc_thermal_power_floor_set_state(proc_priv, false); 484 485 if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_WT_REQ) 486 proc_thermal_wt_req_remove(pdev); 487 else if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_WT_HINT) 488 proc_thermal_wt_hint_remove(pdev); 489 } 490 EXPORT_SYMBOL_GPL(proc_thermal_mmio_remove); 491 492 MODULE_IMPORT_NS("INTEL_TCC"); 493 MODULE_IMPORT_NS("INT340X_THERMAL"); 494 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); 495 MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver"); 496 MODULE_LICENSE("GPL v2"); 497