Loading...
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * k10temp.c - AMD Family 10h/11h/12h/14h/15h/16h/17h
4 * processor hardware monitoring
5 *
6 * Copyright (c) 2009 Clemens Ladisch <clemens@ladisch.de>
7 * Copyright (c) 2020 Guenter Roeck <linux@roeck-us.net>
8 *
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.
14 */
15
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>
25
26MODULE_DESCRIPTION("AMD Family 10h+ CPU core temperature monitor");
27MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
28MODULE_LICENSE("GPL");
29
30static bool force;
31module_param(force, bool, 0444);
32MODULE_PARM_DESC(force, "force loading on processors with erratum 319");
33
34/* Provide lock for writing to NB_SMU_IND_ADDR */
35static DEFINE_MUTEX(nb_smu_ind_mutex);
36
37#ifndef PCI_DEVICE_ID_AMD_15H_M70H_NB_F3
38#define PCI_DEVICE_ID_AMD_15H_M70H_NB_F3 0x15b3
39#endif
40
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
45
46/* DRAM controller (PCI function 2) */
47#define REG_DCT0_CONFIG_HIGH 0x094
48#define DDR3_MODE BIT(8)
49
50/* miscellaneous (PCI function 3) */
51#define REG_HARDWARE_THERMAL_CONTROL 0x64
52#define HTC_ENABLE BIT(0)
53
54#define REG_REPORTED_TEMPERATURE 0xa4
55
56#define REG_NORTHBRIDGE_CAPABILITIES 0xe8
57#define NB_CAP_HTC BIT(10)
58
59/*
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]
64 */
65#define F15H_M60H_HARDWARE_TEMP_CTRL_OFFSET 0xd8200c64
66#define F15H_M60H_REPORTED_TEMP_CTRL_OFFSET 0xd8200ca4
67
68/* Common for Zen CPU families (Family 17h and 18h and 19h and 1Ah) */
69#define ZEN_REPORTED_TEMP_CTRL_BASE 0x00059800
70
71#define ZEN_CCD_TEMP(offset, x) (ZEN_REPORTED_TEMP_CTRL_BASE + \
72 (offset) + ((x) * 4))
73#define ZEN_CCD_TEMP_VALID BIT(11)
74#define ZEN_CCD_TEMP_MASK GENMASK(10, 0)
75
76#define ZEN_CUR_TEMP_SHIFT 21
77#define ZEN_CUR_TEMP_RANGE_SEL_MASK BIT(19)
78#define ZEN_CUR_TEMP_TJ_SEL_MASK GENMASK(17, 16)
79
80/*
81 * AMD's Industrial processor 3255 supports temperature from -40 deg to 105 deg Celsius.
82 * Use the model name to identify 3255 CPUs and set a flag to display negative temperature.
83 * Do not round off to zero for negative Tctl or Tdie values if the flag is set
84 */
85#define AMD_I3255_STR "3255"
86
87struct k10temp_data {
88 struct pci_dev *pdev;
89 void (*read_htcreg)(struct pci_dev *pdev, u32 *regval);
90 void (*read_tempreg)(struct pci_dev *pdev, u32 *regval);
91 int temp_offset;
92 u32 temp_adjust_mask;
93 u32 show_temp;
94 bool is_zen;
95 u32 ccd_offset;
96 bool disp_negative;
97};
98
99#define TCTL_BIT 0
100#define TDIE_BIT 1
101#define TCCD_BIT(x) ((x) + 2)
102
103#define HAVE_TEMP(d, channel) ((d)->show_temp & BIT(channel))
104#define HAVE_TDIE(d) HAVE_TEMP(d, TDIE_BIT)
105
106struct tctl_offset {
107 u8 model;
108 char const *id;
109 int offset;
110};
111
112static const struct tctl_offset tctl_offset_table[] = {
113 { 0x17, "AMD Ryzen 5 1600X", 20000 },
114 { 0x17, "AMD Ryzen 7 1700X", 20000 },
115 { 0x17, "AMD Ryzen 7 1800X", 20000 },
116 { 0x17, "AMD Ryzen 7 2700X", 10000 },
117 { 0x17, "AMD Ryzen Threadripper 19", 27000 }, /* 19{00,20,50}X */
118 { 0x17, "AMD Ryzen Threadripper 29", 27000 }, /* 29{20,50,70,90}[W]X */
119};
120
121static void read_htcreg_pci(struct pci_dev *pdev, u32 *regval)
122{
123 pci_read_config_dword(pdev, REG_HARDWARE_THERMAL_CONTROL, regval);
124}
125
126static void read_tempreg_pci(struct pci_dev *pdev, u32 *regval)
127{
128 pci_read_config_dword(pdev, REG_REPORTED_TEMPERATURE, regval);
129}
130
131static void amd_nb_index_read(struct pci_dev *pdev, unsigned int devfn,
132 unsigned int base, int offset, u32 *val)
133{
134 mutex_lock(&nb_smu_ind_mutex);
135 pci_bus_write_config_dword(pdev->bus, devfn,
136 base, offset);
137 pci_bus_read_config_dword(pdev->bus, devfn,
138 base + 4, val);
139 mutex_unlock(&nb_smu_ind_mutex);
140}
141
142static void read_htcreg_nb_f15(struct pci_dev *pdev, u32 *regval)
143{
144 amd_nb_index_read(pdev, PCI_DEVFN(0, 0), 0xb8,
145 F15H_M60H_HARDWARE_TEMP_CTRL_OFFSET, regval);
146}
147
148static void read_tempreg_nb_f15(struct pci_dev *pdev, u32 *regval)
149{
150 amd_nb_index_read(pdev, PCI_DEVFN(0, 0), 0xb8,
151 F15H_M60H_REPORTED_TEMP_CTRL_OFFSET, regval);
152}
153
154static void read_tempreg_nb_zen(struct pci_dev *pdev, u32 *regval)
155{
156 amd_smn_read(amd_pci_dev_to_node_id(pdev),
157 ZEN_REPORTED_TEMP_CTRL_BASE, regval);
158}
159
160static long get_raw_temp(struct k10temp_data *data)
161{
162 u32 regval;
163 long temp;
164
165 data->read_tempreg(data->pdev, ®val);
166 temp = (regval >> ZEN_CUR_TEMP_SHIFT) * 125;
167 if ((regval & data->temp_adjust_mask) ||
168 (regval & ZEN_CUR_TEMP_TJ_SEL_MASK) == ZEN_CUR_TEMP_TJ_SEL_MASK)
169 temp -= 49000;
170 return temp;
171}
172
173static const char *k10temp_temp_label[] = {
174 "Tctl",
175 "Tdie",
176 "Tccd1",
177 "Tccd2",
178 "Tccd3",
179 "Tccd4",
180 "Tccd5",
181 "Tccd6",
182 "Tccd7",
183 "Tccd8",
184 "Tccd9",
185 "Tccd10",
186 "Tccd11",
187 "Tccd12",
188};
189
190static int k10temp_read_labels(struct device *dev,
191 enum hwmon_sensor_types type,
192 u32 attr, int channel, const char **str)
193{
194 switch (type) {
195 case hwmon_temp:
196 *str = k10temp_temp_label[channel];
197 break;
198 default:
199 return -EOPNOTSUPP;
200 }
201 return 0;
202}
203
204static int k10temp_read_temp(struct device *dev, u32 attr, int channel,
205 long *val)
206{
207 struct k10temp_data *data = dev_get_drvdata(dev);
208 u32 regval;
209
210 switch (attr) {
211 case hwmon_temp_input:
212 switch (channel) {
213 case 0: /* Tctl */
214 *val = get_raw_temp(data);
215 if (*val < 0 && !data->disp_negative)
216 *val = 0;
217 break;
218 case 1: /* Tdie */
219 *val = get_raw_temp(data) - data->temp_offset;
220 if (*val < 0 && !data->disp_negative)
221 *val = 0;
222 break;
223 case 2 ... 13: /* Tccd{1-12} */
224 amd_smn_read(amd_pci_dev_to_node_id(data->pdev),
225 ZEN_CCD_TEMP(data->ccd_offset, channel - 2),
226 ®val);
227 *val = (regval & ZEN_CCD_TEMP_MASK) * 125 - 49000;
228 break;
229 default:
230 return -EOPNOTSUPP;
231 }
232 break;
233 case hwmon_temp_max:
234 *val = 70 * 1000;
235 break;
236 case hwmon_temp_crit:
237 data->read_htcreg(data->pdev, ®val);
238 *val = ((regval >> 16) & 0x7f) * 500 + 52000;
239 break;
240 case hwmon_temp_crit_hyst:
241 data->read_htcreg(data->pdev, ®val);
242 *val = (((regval >> 16) & 0x7f)
243 - ((regval >> 24) & 0xf)) * 500 + 52000;
244 break;
245 default:
246 return -EOPNOTSUPP;
247 }
248 return 0;
249}
250
251static int k10temp_read(struct device *dev, enum hwmon_sensor_types type,
252 u32 attr, int channel, long *val)
253{
254 switch (type) {
255 case hwmon_temp:
256 return k10temp_read_temp(dev, attr, channel, val);
257 default:
258 return -EOPNOTSUPP;
259 }
260}
261
262static umode_t k10temp_is_visible(const void *_data,
263 enum hwmon_sensor_types type,
264 u32 attr, int channel)
265{
266 const struct k10temp_data *data = _data;
267 struct pci_dev *pdev = data->pdev;
268 u32 reg;
269
270 switch (type) {
271 case hwmon_temp:
272 switch (attr) {
273 case hwmon_temp_input:
274 if (!HAVE_TEMP(data, channel))
275 return 0;
276 break;
277 case hwmon_temp_max:
278 if (channel || data->is_zen)
279 return 0;
280 break;
281 case hwmon_temp_crit:
282 case hwmon_temp_crit_hyst:
283 if (channel || !data->read_htcreg)
284 return 0;
285
286 pci_read_config_dword(pdev,
287 REG_NORTHBRIDGE_CAPABILITIES,
288 ®);
289 if (!(reg & NB_CAP_HTC))
290 return 0;
291
292 data->read_htcreg(data->pdev, ®);
293 if (!(reg & HTC_ENABLE))
294 return 0;
295 break;
296 case hwmon_temp_label:
297 /* Show temperature labels only on Zen CPUs */
298 if (!data->is_zen || !HAVE_TEMP(data, channel))
299 return 0;
300 break;
301 default:
302 return 0;
303 }
304 break;
305 default:
306 return 0;
307 }
308 return 0444;
309}
310
311static bool has_erratum_319(struct pci_dev *pdev)
312{
313 u32 pkg_type, reg_dram_cfg;
314
315 if (boot_cpu_data.x86 != 0x10)
316 return false;
317
318 /*
319 * Erratum 319: The thermal sensor of Socket F/AM2+ processors
320 * may be unreliable.
321 */
322 pkg_type = cpuid_ebx(0x80000001) & CPUID_PKGTYPE_MASK;
323 if (pkg_type == CPUID_PKGTYPE_F)
324 return true;
325 if (pkg_type != CPUID_PKGTYPE_AM2R2_AM3)
326 return false;
327
328 /* DDR3 memory implies socket AM3, which is good */
329 pci_bus_read_config_dword(pdev->bus,
330 PCI_DEVFN(PCI_SLOT(pdev->devfn), 2),
331 REG_DCT0_CONFIG_HIGH, ®_dram_cfg);
332 if (reg_dram_cfg & DDR3_MODE)
333 return false;
334
335 /*
336 * Unfortunately it is possible to run a socket AM3 CPU with DDR2
337 * memory. We blacklist all the cores which do exist in socket AM2+
338 * format. It still isn't perfect, as RB-C2 cores exist in both AM2+
339 * and AM3 formats, but that's the best we can do.
340 */
341 return boot_cpu_data.x86_model < 4 ||
342 (boot_cpu_data.x86_model == 4 && boot_cpu_data.x86_stepping <= 2);
343}
344
345static const struct hwmon_channel_info * const k10temp_info[] = {
346 HWMON_CHANNEL_INFO(temp,
347 HWMON_T_INPUT | HWMON_T_MAX |
348 HWMON_T_CRIT | HWMON_T_CRIT_HYST |
349 HWMON_T_LABEL,
350 HWMON_T_INPUT | HWMON_T_LABEL,
351 HWMON_T_INPUT | HWMON_T_LABEL,
352 HWMON_T_INPUT | HWMON_T_LABEL,
353 HWMON_T_INPUT | HWMON_T_LABEL,
354 HWMON_T_INPUT | HWMON_T_LABEL,
355 HWMON_T_INPUT | HWMON_T_LABEL,
356 HWMON_T_INPUT | HWMON_T_LABEL,
357 HWMON_T_INPUT | HWMON_T_LABEL,
358 HWMON_T_INPUT | HWMON_T_LABEL,
359 HWMON_T_INPUT | HWMON_T_LABEL,
360 HWMON_T_INPUT | HWMON_T_LABEL,
361 HWMON_T_INPUT | HWMON_T_LABEL,
362 HWMON_T_INPUT | HWMON_T_LABEL),
363 NULL
364};
365
366static const struct hwmon_ops k10temp_hwmon_ops = {
367 .is_visible = k10temp_is_visible,
368 .read = k10temp_read,
369 .read_string = k10temp_read_labels,
370};
371
372static const struct hwmon_chip_info k10temp_chip_info = {
373 .ops = &k10temp_hwmon_ops,
374 .info = k10temp_info,
375};
376
377static void k10temp_get_ccd_support(struct pci_dev *pdev,
378 struct k10temp_data *data, int limit)
379{
380 u32 regval;
381 int i;
382
383 for (i = 0; i < limit; i++) {
384 amd_smn_read(amd_pci_dev_to_node_id(pdev),
385 ZEN_CCD_TEMP(data->ccd_offset, i), ®val);
386 if (regval & ZEN_CCD_TEMP_VALID)
387 data->show_temp |= BIT(TCCD_BIT(i));
388 }
389}
390
391static int k10temp_probe(struct pci_dev *pdev, const struct pci_device_id *id)
392{
393 int unreliable = has_erratum_319(pdev);
394 struct device *dev = &pdev->dev;
395 struct k10temp_data *data;
396 struct device *hwmon_dev;
397 int i;
398
399 if (unreliable) {
400 if (!force) {
401 dev_err(dev,
402 "unreliable CPU thermal sensor; monitoring disabled\n");
403 return -ENODEV;
404 }
405 dev_warn(dev,
406 "unreliable CPU thermal sensor; check erratum 319\n");
407 }
408
409 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
410 if (!data)
411 return -ENOMEM;
412
413 data->pdev = pdev;
414 data->show_temp |= BIT(TCTL_BIT); /* Always show Tctl */
415
416 if (boot_cpu_data.x86 == 0x17 &&
417 strstr(boot_cpu_data.x86_model_id, AMD_I3255_STR)) {
418 data->disp_negative = true;
419 }
420
421 if (boot_cpu_data.x86 == 0x15 &&
422 ((boot_cpu_data.x86_model & 0xf0) == 0x60 ||
423 (boot_cpu_data.x86_model & 0xf0) == 0x70)) {
424 data->read_htcreg = read_htcreg_nb_f15;
425 data->read_tempreg = read_tempreg_nb_f15;
426 } else if (boot_cpu_data.x86 == 0x17 || boot_cpu_data.x86 == 0x18) {
427 data->temp_adjust_mask = ZEN_CUR_TEMP_RANGE_SEL_MASK;
428 data->read_tempreg = read_tempreg_nb_zen;
429 data->is_zen = true;
430
431 switch (boot_cpu_data.x86_model) {
432 case 0x1: /* Zen */
433 case 0x8: /* Zen+ */
434 case 0x11: /* Zen APU */
435 case 0x18: /* Zen+ APU */
436 data->ccd_offset = 0x154;
437 k10temp_get_ccd_support(pdev, data, 4);
438 break;
439 case 0x31: /* Zen2 Threadripper */
440 case 0x60: /* Renoir */
441 case 0x68: /* Lucienne */
442 case 0x71: /* Zen2 */
443 data->ccd_offset = 0x154;
444 k10temp_get_ccd_support(pdev, data, 8);
445 break;
446 case 0xa0 ... 0xaf:
447 data->ccd_offset = 0x300;
448 k10temp_get_ccd_support(pdev, data, 8);
449 break;
450 }
451 } else if (boot_cpu_data.x86 == 0x19) {
452 data->temp_adjust_mask = ZEN_CUR_TEMP_RANGE_SEL_MASK;
453 data->read_tempreg = read_tempreg_nb_zen;
454 data->is_zen = true;
455
456 switch (boot_cpu_data.x86_model) {
457 case 0x0 ... 0x1: /* Zen3 SP3/TR */
458 case 0x8: /* Zen3 TR Chagall */
459 case 0x21: /* Zen3 Ryzen Desktop */
460 case 0x50 ... 0x5f: /* Green Sardine */
461 data->ccd_offset = 0x154;
462 k10temp_get_ccd_support(pdev, data, 8);
463 break;
464 case 0x40 ... 0x4f: /* Yellow Carp */
465 data->ccd_offset = 0x300;
466 k10temp_get_ccd_support(pdev, data, 8);
467 break;
468 case 0x60 ... 0x6f:
469 case 0x70 ... 0x7f:
470 data->ccd_offset = 0x308;
471 k10temp_get_ccd_support(pdev, data, 8);
472 break;
473 case 0x10 ... 0x1f:
474 case 0xa0 ... 0xaf:
475 data->ccd_offset = 0x300;
476 k10temp_get_ccd_support(pdev, data, 12);
477 break;
478 }
479 } else if (boot_cpu_data.x86 == 0x1a) {
480 data->temp_adjust_mask = ZEN_CUR_TEMP_RANGE_SEL_MASK;
481 data->read_tempreg = read_tempreg_nb_zen;
482 data->is_zen = true;
483 } else {
484 data->read_htcreg = read_htcreg_pci;
485 data->read_tempreg = read_tempreg_pci;
486 }
487
488 for (i = 0; i < ARRAY_SIZE(tctl_offset_table); i++) {
489 const struct tctl_offset *entry = &tctl_offset_table[i];
490
491 if (boot_cpu_data.x86 == entry->model &&
492 strstr(boot_cpu_data.x86_model_id, entry->id)) {
493 data->show_temp |= BIT(TDIE_BIT); /* show Tdie */
494 data->temp_offset = entry->offset;
495 break;
496 }
497 }
498
499 hwmon_dev = devm_hwmon_device_register_with_info(dev, "k10temp", data,
500 &k10temp_chip_info,
501 NULL);
502 return PTR_ERR_OR_ZERO(hwmon_dev);
503}
504
505static const struct pci_device_id k10temp_id_table[] = {
506 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC) },
507 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_11H_NB_MISC) },
508 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CNB17H_F3) },
509 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_NB_F3) },
510 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M10H_F3) },
511 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M30H_NB_F3) },
512 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M60H_NB_F3) },
513 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M70H_NB_F3) },
514 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_NB_F3) },
515 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_M30H_NB_F3) },
516 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_DF_F3) },
517 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M10H_DF_F3) },
518 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M30H_DF_F3) },
519 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M60H_DF_F3) },
520 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M70H_DF_F3) },
521 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_MA0H_DF_F3) },
522 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_DF_F3) },
523 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M10H_DF_F3) },
524 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M40H_DF_F3) },
525 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M50H_DF_F3) },
526 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M60H_DF_F3) },
527 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M70H_DF_F3) },
528 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_M78H_DF_F3) },
529 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_1AH_M00H_DF_F3) },
530 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_1AH_M20H_DF_F3) },
531 { PCI_VDEVICE(HYGON, PCI_DEVICE_ID_AMD_17H_DF_F3) },
532 {}
533};
534MODULE_DEVICE_TABLE(pci, k10temp_id_table);
535
536static struct pci_driver k10temp_driver = {
537 .name = "k10temp",
538 .id_table = k10temp_id_table,
539 .probe = k10temp_probe,
540};
541
542module_pci_driver(k10temp_driver);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * k10temp.c - AMD Family 10h/11h/12h/14h/15h/16h processor hardware monitoring
4 *
5 * Copyright (c) 2009 Clemens Ladisch <clemens@ladisch.de>
6 */
7
8#include <linux/err.h>
9#include <linux/hwmon.h>
10#include <linux/hwmon-sysfs.h>
11#include <linux/init.h>
12#include <linux/module.h>
13#include <linux/pci.h>
14#include <linux/pci_ids.h>
15#include <asm/amd_nb.h>
16#include <asm/processor.h>
17
18MODULE_DESCRIPTION("AMD Family 10h+ CPU core temperature monitor");
19MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
20MODULE_LICENSE("GPL");
21
22static bool force;
23module_param(force, bool, 0444);
24MODULE_PARM_DESC(force, "force loading on processors with erratum 319");
25
26/* Provide lock for writing to NB_SMU_IND_ADDR */
27static DEFINE_MUTEX(nb_smu_ind_mutex);
28
29#ifndef PCI_DEVICE_ID_AMD_15H_M70H_NB_F3
30#define PCI_DEVICE_ID_AMD_15H_M70H_NB_F3 0x15b3
31#endif
32
33/* CPUID function 0x80000001, ebx */
34#define CPUID_PKGTYPE_MASK 0xf0000000
35#define CPUID_PKGTYPE_F 0x00000000
36#define CPUID_PKGTYPE_AM2R2_AM3 0x10000000
37
38/* DRAM controller (PCI function 2) */
39#define REG_DCT0_CONFIG_HIGH 0x094
40#define DDR3_MODE 0x00000100
41
42/* miscellaneous (PCI function 3) */
43#define REG_HARDWARE_THERMAL_CONTROL 0x64
44#define HTC_ENABLE 0x00000001
45
46#define REG_REPORTED_TEMPERATURE 0xa4
47
48#define REG_NORTHBRIDGE_CAPABILITIES 0xe8
49#define NB_CAP_HTC 0x00000400
50
51/*
52 * For F15h M60h and M70h, REG_HARDWARE_THERMAL_CONTROL
53 * and REG_REPORTED_TEMPERATURE have been moved to
54 * D0F0xBC_xD820_0C64 [Hardware Temperature Control]
55 * D0F0xBC_xD820_0CA4 [Reported Temperature Control]
56 */
57#define F15H_M60H_HARDWARE_TEMP_CTRL_OFFSET 0xd8200c64
58#define F15H_M60H_REPORTED_TEMP_CTRL_OFFSET 0xd8200ca4
59
60/* F17h M01h Access througn SMN */
61#define F17H_M01H_REPORTED_TEMP_CTRL_OFFSET 0x00059800
62
63struct k10temp_data {
64 struct pci_dev *pdev;
65 void (*read_htcreg)(struct pci_dev *pdev, u32 *regval);
66 void (*read_tempreg)(struct pci_dev *pdev, u32 *regval);
67 int temp_offset;
68 u32 temp_adjust_mask;
69 bool show_tdie;
70};
71
72struct tctl_offset {
73 u8 model;
74 char const *id;
75 int offset;
76};
77
78static const struct tctl_offset tctl_offset_table[] = {
79 { 0x17, "AMD Ryzen 5 1600X", 20000 },
80 { 0x17, "AMD Ryzen 7 1700X", 20000 },
81 { 0x17, "AMD Ryzen 7 1800X", 20000 },
82 { 0x17, "AMD Ryzen 7 2700X", 10000 },
83 { 0x17, "AMD Ryzen Threadripper 19", 27000 }, /* 19{00,20,50}X */
84 { 0x17, "AMD Ryzen Threadripper 29", 27000 }, /* 29{20,50,70,90}[W]X */
85};
86
87static void read_htcreg_pci(struct pci_dev *pdev, u32 *regval)
88{
89 pci_read_config_dword(pdev, REG_HARDWARE_THERMAL_CONTROL, regval);
90}
91
92static void read_tempreg_pci(struct pci_dev *pdev, u32 *regval)
93{
94 pci_read_config_dword(pdev, REG_REPORTED_TEMPERATURE, regval);
95}
96
97static void amd_nb_index_read(struct pci_dev *pdev, unsigned int devfn,
98 unsigned int base, int offset, u32 *val)
99{
100 mutex_lock(&nb_smu_ind_mutex);
101 pci_bus_write_config_dword(pdev->bus, devfn,
102 base, offset);
103 pci_bus_read_config_dword(pdev->bus, devfn,
104 base + 4, val);
105 mutex_unlock(&nb_smu_ind_mutex);
106}
107
108static void read_htcreg_nb_f15(struct pci_dev *pdev, u32 *regval)
109{
110 amd_nb_index_read(pdev, PCI_DEVFN(0, 0), 0xb8,
111 F15H_M60H_HARDWARE_TEMP_CTRL_OFFSET, regval);
112}
113
114static void read_tempreg_nb_f15(struct pci_dev *pdev, u32 *regval)
115{
116 amd_nb_index_read(pdev, PCI_DEVFN(0, 0), 0xb8,
117 F15H_M60H_REPORTED_TEMP_CTRL_OFFSET, regval);
118}
119
120static void read_tempreg_nb_f17(struct pci_dev *pdev, u32 *regval)
121{
122 amd_smn_read(amd_pci_dev_to_node_id(pdev),
123 F17H_M01H_REPORTED_TEMP_CTRL_OFFSET, regval);
124}
125
126static unsigned int get_raw_temp(struct k10temp_data *data)
127{
128 unsigned int temp;
129 u32 regval;
130
131 data->read_tempreg(data->pdev, ®val);
132 temp = (regval >> 21) * 125;
133 if (regval & data->temp_adjust_mask)
134 temp -= 49000;
135 return temp;
136}
137
138static ssize_t temp1_input_show(struct device *dev,
139 struct device_attribute *attr, char *buf)
140{
141 struct k10temp_data *data = dev_get_drvdata(dev);
142 unsigned int temp = get_raw_temp(data);
143
144 if (temp > data->temp_offset)
145 temp -= data->temp_offset;
146 else
147 temp = 0;
148
149 return sprintf(buf, "%u\n", temp);
150}
151
152static ssize_t temp2_input_show(struct device *dev,
153 struct device_attribute *devattr, char *buf)
154{
155 struct k10temp_data *data = dev_get_drvdata(dev);
156 unsigned int temp = get_raw_temp(data);
157
158 return sprintf(buf, "%u\n", temp);
159}
160
161static ssize_t temp_label_show(struct device *dev,
162 struct device_attribute *devattr, char *buf)
163{
164 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
165
166 return sprintf(buf, "%s\n", attr->index ? "Tctl" : "Tdie");
167}
168
169static ssize_t temp1_max_show(struct device *dev,
170 struct device_attribute *attr, char *buf)
171{
172 return sprintf(buf, "%d\n", 70 * 1000);
173}
174
175static ssize_t temp_crit_show(struct device *dev,
176 struct device_attribute *devattr, char *buf)
177{
178 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
179 struct k10temp_data *data = dev_get_drvdata(dev);
180 int show_hyst = attr->index;
181 u32 regval;
182 int value;
183
184 data->read_htcreg(data->pdev, ®val);
185 value = ((regval >> 16) & 0x7f) * 500 + 52000;
186 if (show_hyst)
187 value -= ((regval >> 24) & 0xf) * 500;
188 return sprintf(buf, "%d\n", value);
189}
190
191static DEVICE_ATTR_RO(temp1_input);
192static DEVICE_ATTR_RO(temp1_max);
193static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_crit, 0);
194static SENSOR_DEVICE_ATTR_RO(temp1_crit_hyst, temp_crit, 1);
195
196static SENSOR_DEVICE_ATTR_RO(temp1_label, temp_label, 0);
197static DEVICE_ATTR_RO(temp2_input);
198static SENSOR_DEVICE_ATTR_RO(temp2_label, temp_label, 1);
199
200static umode_t k10temp_is_visible(struct kobject *kobj,
201 struct attribute *attr, int index)
202{
203 struct device *dev = container_of(kobj, struct device, kobj);
204 struct k10temp_data *data = dev_get_drvdata(dev);
205 struct pci_dev *pdev = data->pdev;
206 u32 reg;
207
208 switch (index) {
209 case 0 ... 1: /* temp1_input, temp1_max */
210 default:
211 break;
212 case 2 ... 3: /* temp1_crit, temp1_crit_hyst */
213 if (!data->read_htcreg)
214 return 0;
215
216 pci_read_config_dword(pdev, REG_NORTHBRIDGE_CAPABILITIES,
217 ®);
218 if (!(reg & NB_CAP_HTC))
219 return 0;
220
221 data->read_htcreg(data->pdev, ®);
222 if (!(reg & HTC_ENABLE))
223 return 0;
224 break;
225 case 4 ... 6: /* temp1_label, temp2_input, temp2_label */
226 if (!data->show_tdie)
227 return 0;
228 break;
229 }
230 return attr->mode;
231}
232
233static struct attribute *k10temp_attrs[] = {
234 &dev_attr_temp1_input.attr,
235 &dev_attr_temp1_max.attr,
236 &sensor_dev_attr_temp1_crit.dev_attr.attr,
237 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
238 &sensor_dev_attr_temp1_label.dev_attr.attr,
239 &dev_attr_temp2_input.attr,
240 &sensor_dev_attr_temp2_label.dev_attr.attr,
241 NULL
242};
243
244static const struct attribute_group k10temp_group = {
245 .attrs = k10temp_attrs,
246 .is_visible = k10temp_is_visible,
247};
248__ATTRIBUTE_GROUPS(k10temp);
249
250static bool has_erratum_319(struct pci_dev *pdev)
251{
252 u32 pkg_type, reg_dram_cfg;
253
254 if (boot_cpu_data.x86 != 0x10)
255 return false;
256
257 /*
258 * Erratum 319: The thermal sensor of Socket F/AM2+ processors
259 * may be unreliable.
260 */
261 pkg_type = cpuid_ebx(0x80000001) & CPUID_PKGTYPE_MASK;
262 if (pkg_type == CPUID_PKGTYPE_F)
263 return true;
264 if (pkg_type != CPUID_PKGTYPE_AM2R2_AM3)
265 return false;
266
267 /* DDR3 memory implies socket AM3, which is good */
268 pci_bus_read_config_dword(pdev->bus,
269 PCI_DEVFN(PCI_SLOT(pdev->devfn), 2),
270 REG_DCT0_CONFIG_HIGH, ®_dram_cfg);
271 if (reg_dram_cfg & DDR3_MODE)
272 return false;
273
274 /*
275 * Unfortunately it is possible to run a socket AM3 CPU with DDR2
276 * memory. We blacklist all the cores which do exist in socket AM2+
277 * format. It still isn't perfect, as RB-C2 cores exist in both AM2+
278 * and AM3 formats, but that's the best we can do.
279 */
280 return boot_cpu_data.x86_model < 4 ||
281 (boot_cpu_data.x86_model == 4 && boot_cpu_data.x86_stepping <= 2);
282}
283
284static int k10temp_probe(struct pci_dev *pdev,
285 const struct pci_device_id *id)
286{
287 int unreliable = has_erratum_319(pdev);
288 struct device *dev = &pdev->dev;
289 struct k10temp_data *data;
290 struct device *hwmon_dev;
291 int i;
292
293 if (unreliable) {
294 if (!force) {
295 dev_err(dev,
296 "unreliable CPU thermal sensor; monitoring disabled\n");
297 return -ENODEV;
298 }
299 dev_warn(dev,
300 "unreliable CPU thermal sensor; check erratum 319\n");
301 }
302
303 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
304 if (!data)
305 return -ENOMEM;
306
307 data->pdev = pdev;
308
309 if (boot_cpu_data.x86 == 0x15 &&
310 ((boot_cpu_data.x86_model & 0xf0) == 0x60 ||
311 (boot_cpu_data.x86_model & 0xf0) == 0x70)) {
312 data->read_htcreg = read_htcreg_nb_f15;
313 data->read_tempreg = read_tempreg_nb_f15;
314 } else if (boot_cpu_data.x86 == 0x17 || boot_cpu_data.x86 == 0x18) {
315 data->temp_adjust_mask = 0x80000;
316 data->read_tempreg = read_tempreg_nb_f17;
317 data->show_tdie = true;
318 } else {
319 data->read_htcreg = read_htcreg_pci;
320 data->read_tempreg = read_tempreg_pci;
321 }
322
323 for (i = 0; i < ARRAY_SIZE(tctl_offset_table); i++) {
324 const struct tctl_offset *entry = &tctl_offset_table[i];
325
326 if (boot_cpu_data.x86 == entry->model &&
327 strstr(boot_cpu_data.x86_model_id, entry->id)) {
328 data->temp_offset = entry->offset;
329 break;
330 }
331 }
332
333 hwmon_dev = devm_hwmon_device_register_with_groups(dev, "k10temp", data,
334 k10temp_groups);
335 return PTR_ERR_OR_ZERO(hwmon_dev);
336}
337
338static const struct pci_device_id k10temp_id_table[] = {
339 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC) },
340 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_11H_NB_MISC) },
341 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CNB17H_F3) },
342 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_NB_F3) },
343 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M10H_F3) },
344 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M30H_NB_F3) },
345 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M60H_NB_F3) },
346 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M70H_NB_F3) },
347 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_NB_F3) },
348 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_M30H_NB_F3) },
349 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_DF_F3) },
350 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M10H_DF_F3) },
351 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M30H_DF_F3) },
352 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M70H_DF_F3) },
353 { PCI_VDEVICE(HYGON, PCI_DEVICE_ID_AMD_17H_DF_F3) },
354 {}
355};
356MODULE_DEVICE_TABLE(pci, k10temp_id_table);
357
358static struct pci_driver k10temp_driver = {
359 .name = "k10temp",
360 .id_table = k10temp_id_table,
361 .probe = k10temp_probe,
362};
363
364module_pci_driver(k10temp_driver);