1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * k10temp.c - AMD Family 10h/11h/12h/14h/15h/16h/17h
4 * processor hardware monitoring
6 * Copyright (c) 2009 Clemens Ladisch <clemens@ladisch.de>
7 * Copyright (c) 2020 Guenter Roeck <linux@roeck-us.net>
9 * Implementation notes:
10 * - CCD register address information as well as the calculation to
11 * convert raw register values is from https://github.com/ocerman/zenpower.
12 * The information is not confirmed from chip datasheets, but experiments
13 * suggest that it provides reasonable temperature values.
16 #include <linux/bitops.h>
17 #include <linux/err.h>
18 #include <linux/hwmon.h>
19 #include <linux/init.h>
20 #include <linux/module.h>
21 #include <linux/pci.h>
22 #include <linux/pci_ids.h>
23 #include <asm/amd_nb.h>
24 #include <asm/processor.h>
26 MODULE_DESCRIPTION("AMD Family 10h+ CPU core temperature monitor");
27 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
28 MODULE_LICENSE("GPL");
31 module_param(force, bool, 0444);
32 MODULE_PARM_DESC(force, "force loading on processors with erratum 319");
34 /* Provide lock for writing to NB_SMU_IND_ADDR */
35 static DEFINE_MUTEX(nb_smu_ind_mutex);
37 #ifndef PCI_DEVICE_ID_AMD_15H_M70H_NB_F3
38 #define PCI_DEVICE_ID_AMD_15H_M70H_NB_F3 0x15b3
41 /* CPUID function 0x80000001, ebx */
42 #define CPUID_PKGTYPE_MASK GENMASK(31, 28)
43 #define CPUID_PKGTYPE_F 0x00000000
44 #define CPUID_PKGTYPE_AM2R2_AM3 0x10000000
46 /* DRAM controller (PCI function 2) */
47 #define REG_DCT0_CONFIG_HIGH 0x094
48 #define DDR3_MODE BIT(8)
50 /* miscellaneous (PCI function 3) */
51 #define REG_HARDWARE_THERMAL_CONTROL 0x64
52 #define HTC_ENABLE BIT(0)
54 #define REG_REPORTED_TEMPERATURE 0xa4
56 #define REG_NORTHBRIDGE_CAPABILITIES 0xe8
57 #define NB_CAP_HTC BIT(10)
60 * For F15h M60h and M70h, REG_HARDWARE_THERMAL_CONTROL
61 * and REG_REPORTED_TEMPERATURE have been moved to
62 * D0F0xBC_xD820_0C64 [Hardware Temperature Control]
63 * D0F0xBC_xD820_0CA4 [Reported Temperature Control]
65 #define F15H_M60H_HARDWARE_TEMP_CTRL_OFFSET 0xd8200c64
66 #define F15H_M60H_REPORTED_TEMP_CTRL_OFFSET 0xd8200ca4
68 /* Common for Zen CPU families (Family 17h and 18h and 19h) */
69 #define ZEN_REPORTED_TEMP_CTRL_BASE 0x00059800
71 #define ZEN_CCD_TEMP(offset, x) (ZEN_REPORTED_TEMP_CTRL_BASE + \
73 #define ZEN_CCD_TEMP_VALID BIT(11)
74 #define ZEN_CCD_TEMP_MASK GENMASK(10, 0)
76 #define ZEN_CUR_TEMP_SHIFT 21
77 #define ZEN_CUR_TEMP_RANGE_SEL_MASK BIT(19)
81 void (*read_htcreg)(struct pci_dev *pdev, u32 *regval);
82 void (*read_tempreg)(struct pci_dev *pdev, u32 *regval);
92 #define TCCD_BIT(x) ((x) + 2)
94 #define HAVE_TEMP(d, channel) ((d)->show_temp & BIT(channel))
95 #define HAVE_TDIE(d) HAVE_TEMP(d, TDIE_BIT)
103 static const struct tctl_offset tctl_offset_table[] = {
104 { 0x17, "AMD Ryzen 5 1600X", 20000 },
105 { 0x17, "AMD Ryzen 7 1700X", 20000 },
106 { 0x17, "AMD Ryzen 7 1800X", 20000 },
107 { 0x17, "AMD Ryzen 7 2700X", 10000 },
108 { 0x17, "AMD Ryzen Threadripper 19", 27000 }, /* 19{00,20,50}X */
109 { 0x17, "AMD Ryzen Threadripper 29", 27000 }, /* 29{20,50,70,90}[W]X */
112 static void read_htcreg_pci(struct pci_dev *pdev, u32 *regval)
114 pci_read_config_dword(pdev, REG_HARDWARE_THERMAL_CONTROL, regval);
117 static void read_tempreg_pci(struct pci_dev *pdev, u32 *regval)
119 pci_read_config_dword(pdev, REG_REPORTED_TEMPERATURE, regval);
122 static void amd_nb_index_read(struct pci_dev *pdev, unsigned int devfn,
123 unsigned int base, int offset, u32 *val)
125 mutex_lock(&nb_smu_ind_mutex);
126 pci_bus_write_config_dword(pdev->bus, devfn,
128 pci_bus_read_config_dword(pdev->bus, devfn,
130 mutex_unlock(&nb_smu_ind_mutex);
133 static void read_htcreg_nb_f15(struct pci_dev *pdev, u32 *regval)
135 amd_nb_index_read(pdev, PCI_DEVFN(0, 0), 0xb8,
136 F15H_M60H_HARDWARE_TEMP_CTRL_OFFSET, regval);
139 static void read_tempreg_nb_f15(struct pci_dev *pdev, u32 *regval)
141 amd_nb_index_read(pdev, PCI_DEVFN(0, 0), 0xb8,
142 F15H_M60H_REPORTED_TEMP_CTRL_OFFSET, regval);
145 static void read_tempreg_nb_zen(struct pci_dev *pdev, u32 *regval)
147 amd_smn_read(amd_pci_dev_to_node_id(pdev),
148 ZEN_REPORTED_TEMP_CTRL_BASE, regval);
151 static long get_raw_temp(struct k10temp_data *data)
156 data->read_tempreg(data->pdev, ®val);
157 temp = (regval >> ZEN_CUR_TEMP_SHIFT) * 125;
158 if (regval & data->temp_adjust_mask)
163 static const char *k10temp_temp_label[] = {
180 static int k10temp_read_labels(struct device *dev,
181 enum hwmon_sensor_types type,
182 u32 attr, int channel, const char **str)
186 *str = k10temp_temp_label[channel];
194 static int k10temp_read_temp(struct device *dev, u32 attr, int channel,
197 struct k10temp_data *data = dev_get_drvdata(dev);
201 case hwmon_temp_input:
204 *val = get_raw_temp(data);
209 *val = get_raw_temp(data) - data->temp_offset;
213 case 2 ... 13: /* Tccd{1-12} */
214 amd_smn_read(amd_pci_dev_to_node_id(data->pdev),
215 ZEN_CCD_TEMP(data->ccd_offset, channel - 2),
217 *val = (regval & ZEN_CCD_TEMP_MASK) * 125 - 49000;
226 case hwmon_temp_crit:
227 data->read_htcreg(data->pdev, ®val);
228 *val = ((regval >> 16) & 0x7f) * 500 + 52000;
230 case hwmon_temp_crit_hyst:
231 data->read_htcreg(data->pdev, ®val);
232 *val = (((regval >> 16) & 0x7f)
233 - ((regval >> 24) & 0xf)) * 500 + 52000;
241 static int k10temp_read(struct device *dev, enum hwmon_sensor_types type,
242 u32 attr, int channel, long *val)
246 return k10temp_read_temp(dev, attr, channel, val);
252 static umode_t k10temp_is_visible(const void *_data,
253 enum hwmon_sensor_types type,
254 u32 attr, int channel)
256 const struct k10temp_data *data = _data;
257 struct pci_dev *pdev = data->pdev;
263 case hwmon_temp_input:
264 if (!HAVE_TEMP(data, channel))
268 if (channel || data->is_zen)
271 case hwmon_temp_crit:
272 case hwmon_temp_crit_hyst:
273 if (channel || !data->read_htcreg)
276 pci_read_config_dword(pdev,
277 REG_NORTHBRIDGE_CAPABILITIES,
279 if (!(reg & NB_CAP_HTC))
282 data->read_htcreg(data->pdev, ®);
283 if (!(reg & HTC_ENABLE))
286 case hwmon_temp_label:
287 /* Show temperature labels only on Zen CPUs */
288 if (!data->is_zen || !HAVE_TEMP(data, channel))
301 static bool has_erratum_319(struct pci_dev *pdev)
303 u32 pkg_type, reg_dram_cfg;
305 if (boot_cpu_data.x86 != 0x10)
309 * Erratum 319: The thermal sensor of Socket F/AM2+ processors
312 pkg_type = cpuid_ebx(0x80000001) & CPUID_PKGTYPE_MASK;
313 if (pkg_type == CPUID_PKGTYPE_F)
315 if (pkg_type != CPUID_PKGTYPE_AM2R2_AM3)
318 /* DDR3 memory implies socket AM3, which is good */
319 pci_bus_read_config_dword(pdev->bus,
320 PCI_DEVFN(PCI_SLOT(pdev->devfn), 2),
321 REG_DCT0_CONFIG_HIGH, ®_dram_cfg);
322 if (reg_dram_cfg & DDR3_MODE)
326 * Unfortunately it is possible to run a socket AM3 CPU with DDR2
327 * memory. We blacklist all the cores which do exist in socket AM2+
328 * format. It still isn't perfect, as RB-C2 cores exist in both AM2+
329 * and AM3 formats, but that's the best we can do.
331 return boot_cpu_data.x86_model < 4 ||
332 (boot_cpu_data.x86_model == 4 && boot_cpu_data.x86_stepping <= 2);
335 static const struct hwmon_channel_info *k10temp_info[] = {
336 HWMON_CHANNEL_INFO(temp,
337 HWMON_T_INPUT | HWMON_T_MAX |
338 HWMON_T_CRIT | HWMON_T_CRIT_HYST |
340 HWMON_T_INPUT | HWMON_T_LABEL,
341 HWMON_T_INPUT | HWMON_T_LABEL,
342 HWMON_T_INPUT | HWMON_T_LABEL,
343 HWMON_T_INPUT | HWMON_T_LABEL,
344 HWMON_T_INPUT | HWMON_T_LABEL,
345 HWMON_T_INPUT | HWMON_T_LABEL,
346 HWMON_T_INPUT | HWMON_T_LABEL,
347 HWMON_T_INPUT | HWMON_T_LABEL,
348 HWMON_T_INPUT | HWMON_T_LABEL,
349 HWMON_T_INPUT | HWMON_T_LABEL,
350 HWMON_T_INPUT | HWMON_T_LABEL,
351 HWMON_T_INPUT | HWMON_T_LABEL,
352 HWMON_T_INPUT | HWMON_T_LABEL),
356 static const struct hwmon_ops k10temp_hwmon_ops = {
357 .is_visible = k10temp_is_visible,
358 .read = k10temp_read,
359 .read_string = k10temp_read_labels,
362 static const struct hwmon_chip_info k10temp_chip_info = {
363 .ops = &k10temp_hwmon_ops,
364 .info = k10temp_info,
367 static void k10temp_get_ccd_support(struct pci_dev *pdev,
368 struct k10temp_data *data, int limit)
373 for (i = 0; i < limit; i++) {
374 amd_smn_read(amd_pci_dev_to_node_id(pdev),
375 ZEN_CCD_TEMP(data->ccd_offset, i), ®val);
376 if (regval & ZEN_CCD_TEMP_VALID)
377 data->show_temp |= BIT(TCCD_BIT(i));
381 static int k10temp_probe(struct pci_dev *pdev, const struct pci_device_id *id)
383 int unreliable = has_erratum_319(pdev);
384 struct device *dev = &pdev->dev;
385 struct k10temp_data *data;
386 struct device *hwmon_dev;
392 "unreliable CPU thermal sensor; monitoring disabled\n");
396 "unreliable CPU thermal sensor; check erratum 319\n");
399 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
404 data->show_temp |= BIT(TCTL_BIT); /* Always show Tctl */
406 if (boot_cpu_data.x86 == 0x15 &&
407 ((boot_cpu_data.x86_model & 0xf0) == 0x60 ||
408 (boot_cpu_data.x86_model & 0xf0) == 0x70)) {
409 data->read_htcreg = read_htcreg_nb_f15;
410 data->read_tempreg = read_tempreg_nb_f15;
411 } else if (boot_cpu_data.x86 == 0x17 || boot_cpu_data.x86 == 0x18) {
412 data->temp_adjust_mask = ZEN_CUR_TEMP_RANGE_SEL_MASK;
413 data->read_tempreg = read_tempreg_nb_zen;
416 switch (boot_cpu_data.x86_model) {
419 case 0x11: /* Zen APU */
420 case 0x18: /* Zen+ APU */
421 data->ccd_offset = 0x154;
422 k10temp_get_ccd_support(pdev, data, 4);
424 case 0x31: /* Zen2 Threadripper */
425 case 0x60: /* Renoir */
426 case 0x68: /* Lucienne */
427 case 0x71: /* Zen2 */
428 data->ccd_offset = 0x154;
429 k10temp_get_ccd_support(pdev, data, 8);
432 data->ccd_offset = 0x300;
433 k10temp_get_ccd_support(pdev, data, 8);
436 } else if (boot_cpu_data.x86 == 0x19) {
437 data->temp_adjust_mask = ZEN_CUR_TEMP_RANGE_SEL_MASK;
438 data->read_tempreg = read_tempreg_nb_zen;
441 switch (boot_cpu_data.x86_model) {
442 case 0x0 ... 0x1: /* Zen3 SP3/TR */
443 case 0x21: /* Zen3 Ryzen Desktop */
444 case 0x50 ... 0x5f: /* Green Sardine */
445 data->ccd_offset = 0x154;
446 k10temp_get_ccd_support(pdev, data, 8);
448 case 0x40 ... 0x4f: /* Yellow Carp */
449 data->ccd_offset = 0x300;
450 k10temp_get_ccd_support(pdev, data, 8);
454 data->ccd_offset = 0x308;
455 k10temp_get_ccd_support(pdev, data, 8);
459 data->ccd_offset = 0x300;
460 k10temp_get_ccd_support(pdev, data, 12);
464 data->read_htcreg = read_htcreg_pci;
465 data->read_tempreg = read_tempreg_pci;
468 for (i = 0; i < ARRAY_SIZE(tctl_offset_table); i++) {
469 const struct tctl_offset *entry = &tctl_offset_table[i];
471 if (boot_cpu_data.x86 == entry->model &&
472 strstr(boot_cpu_data.x86_model_id, entry->id)) {
473 data->show_temp |= BIT(TDIE_BIT); /* show Tdie */
474 data->temp_offset = entry->offset;
479 hwmon_dev = devm_hwmon_device_register_with_info(dev, "k10temp", data,
482 return PTR_ERR_OR_ZERO(hwmon_dev);
485 static const struct pci_device_id k10temp_id_table[] = {
486 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC) },
487 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_11H_NB_MISC) },
488 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CNB17H_F3) },
489 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_NB_F3) },
490 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M10H_F3) },
491 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M30H_NB_F3) },
492 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M60H_NB_F3) },
493 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M70H_NB_F3) },
494 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_NB_F3) },
495 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_M30H_NB_F3) },
496 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_DF_F3) },
497 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M10H_DF_F3) },
498 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M30H_DF_F3) },
499 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M60H_DF_F3) },
500 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M70H_DF_F3) },
501 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_MA0H_DF_F3) },
502 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_DF_F3) },
503 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M10H_DF_F3) },
504 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M40H_DF_F3) },
505 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M50H_DF_F3) },
506 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M60H_DF_F3) },
507 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M70H_DF_F3) },
508 { PCI_VDEVICE(HYGON, PCI_DEVICE_ID_AMD_17H_DF_F3) },
511 MODULE_DEVICE_TABLE(pci, k10temp_id_table);
513 static struct pci_driver k10temp_driver = {
515 .id_table = k10temp_id_table,
516 .probe = k10temp_probe,
519 module_pci_driver(k10temp_driver);