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 and 1Ah) */
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)
78 #define ZEN_CUR_TEMP_TJ_SEL_MASK GENMASK(17, 16)
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
85 #define AMD_I3255_STR "3255"
89 void (*read_htcreg
)(struct pci_dev
*pdev
, u32
*regval
);
90 void (*read_tempreg
)(struct pci_dev
*pdev
, u32
*regval
);
101 #define TCCD_BIT(x) ((x) + 2)
103 #define HAVE_TEMP(d, channel) ((d)->show_temp & BIT(channel))
111 static const struct tctl_offset tctl_offset_table
[] = {
112 { 0x17, "AMD Ryzen 5 1600X", 20000 },
113 { 0x17, "AMD Ryzen 7 1700X", 20000 },
114 { 0x17, "AMD Ryzen 7 1800X", 20000 },
115 { 0x17, "AMD Ryzen 7 2700X", 10000 },
116 { 0x17, "AMD Ryzen Threadripper 19", 27000 }, /* 19{00,20,50}X */
117 { 0x17, "AMD Ryzen Threadripper 29", 27000 }, /* 29{20,50,70,90}[W]X */
120 static void read_htcreg_pci(struct pci_dev
*pdev
, u32
*regval
)
122 pci_read_config_dword(pdev
, REG_HARDWARE_THERMAL_CONTROL
, regval
);
125 static void read_tempreg_pci(struct pci_dev
*pdev
, u32
*regval
)
127 pci_read_config_dword(pdev
, REG_REPORTED_TEMPERATURE
, regval
);
130 static void amd_nb_index_read(struct pci_dev
*pdev
, unsigned int devfn
,
131 unsigned int base
, int offset
, u32
*val
)
133 mutex_lock(&nb_smu_ind_mutex
);
134 pci_bus_write_config_dword(pdev
->bus
, devfn
,
136 pci_bus_read_config_dword(pdev
->bus
, devfn
,
138 mutex_unlock(&nb_smu_ind_mutex
);
141 static void read_htcreg_nb_f15(struct pci_dev
*pdev
, u32
*regval
)
143 amd_nb_index_read(pdev
, PCI_DEVFN(0, 0), 0xb8,
144 F15H_M60H_HARDWARE_TEMP_CTRL_OFFSET
, regval
);
147 static void read_tempreg_nb_f15(struct pci_dev
*pdev
, u32
*regval
)
149 amd_nb_index_read(pdev
, PCI_DEVFN(0, 0), 0xb8,
150 F15H_M60H_REPORTED_TEMP_CTRL_OFFSET
, regval
);
153 static void read_tempreg_nb_zen(struct pci_dev
*pdev
, u32
*regval
)
155 if (amd_smn_read(amd_pci_dev_to_node_id(pdev
),
156 ZEN_REPORTED_TEMP_CTRL_BASE
, regval
))
160 static int read_ccd_temp_reg(struct k10temp_data
*data
, int ccd
, u32
*regval
)
162 u16 node_id
= amd_pci_dev_to_node_id(data
->pdev
);
164 return amd_smn_read(node_id
, ZEN_CCD_TEMP(data
->ccd_offset
, ccd
), regval
);
167 static long get_raw_temp(struct k10temp_data
*data
)
172 data
->read_tempreg(data
->pdev
, ®val
);
173 temp
= (regval
>> ZEN_CUR_TEMP_SHIFT
) * 125;
174 if ((regval
& data
->temp_adjust_mask
) ||
175 (regval
& ZEN_CUR_TEMP_TJ_SEL_MASK
) == ZEN_CUR_TEMP_TJ_SEL_MASK
)
180 static const char *k10temp_temp_label
[] = {
197 static int k10temp_read_labels(struct device
*dev
,
198 enum hwmon_sensor_types type
,
199 u32 attr
, int channel
, const char **str
)
203 *str
= k10temp_temp_label
[channel
];
211 static int k10temp_read_temp(struct device
*dev
, u32 attr
, int channel
,
214 struct k10temp_data
*data
= dev_get_drvdata(dev
);
215 int ret
= -EOPNOTSUPP
;
219 case hwmon_temp_input
:
222 *val
= get_raw_temp(data
);
223 if (*val
< 0 && !data
->disp_negative
)
227 *val
= get_raw_temp(data
) - data
->temp_offset
;
228 if (*val
< 0 && !data
->disp_negative
)
231 case 2 ... 13: /* Tccd{1-12} */
232 ret
= read_ccd_temp_reg(data
, channel
- 2, ®val
);
237 *val
= (regval
& ZEN_CCD_TEMP_MASK
) * 125 - 49000;
246 case hwmon_temp_crit
:
247 data
->read_htcreg(data
->pdev
, ®val
);
248 *val
= ((regval
>> 16) & 0x7f) * 500 + 52000;
250 case hwmon_temp_crit_hyst
:
251 data
->read_htcreg(data
->pdev
, ®val
);
252 *val
= (((regval
>> 16) & 0x7f)
253 - ((regval
>> 24) & 0xf)) * 500 + 52000;
261 static int k10temp_read(struct device
*dev
, enum hwmon_sensor_types type
,
262 u32 attr
, int channel
, long *val
)
266 return k10temp_read_temp(dev
, attr
, channel
, val
);
272 static umode_t
k10temp_is_visible(const void *drvdata
,
273 enum hwmon_sensor_types type
,
274 u32 attr
, int channel
)
276 const struct k10temp_data
*data
= drvdata
;
277 struct pci_dev
*pdev
= data
->pdev
;
283 case hwmon_temp_input
:
284 if (!HAVE_TEMP(data
, channel
))
288 if (channel
|| data
->is_zen
)
291 case hwmon_temp_crit
:
292 case hwmon_temp_crit_hyst
:
293 if (channel
|| !data
->read_htcreg
)
296 pci_read_config_dword(pdev
,
297 REG_NORTHBRIDGE_CAPABILITIES
,
299 if (!(reg
& NB_CAP_HTC
))
302 data
->read_htcreg(data
->pdev
, ®
);
303 if (!(reg
& HTC_ENABLE
))
306 case hwmon_temp_label
:
307 /* Show temperature labels only on Zen CPUs */
308 if (!data
->is_zen
|| !HAVE_TEMP(data
, channel
))
321 static bool has_erratum_319(struct pci_dev
*pdev
)
323 u32 pkg_type
, reg_dram_cfg
;
325 if (boot_cpu_data
.x86
!= 0x10)
329 * Erratum 319: The thermal sensor of Socket F/AM2+ processors
332 pkg_type
= cpuid_ebx(0x80000001) & CPUID_PKGTYPE_MASK
;
333 if (pkg_type
== CPUID_PKGTYPE_F
)
335 if (pkg_type
!= CPUID_PKGTYPE_AM2R2_AM3
)
338 /* DDR3 memory implies socket AM3, which is good */
339 pci_bus_read_config_dword(pdev
->bus
,
340 PCI_DEVFN(PCI_SLOT(pdev
->devfn
), 2),
341 REG_DCT0_CONFIG_HIGH
, ®_dram_cfg
);
342 if (reg_dram_cfg
& DDR3_MODE
)
346 * Unfortunately it is possible to run a socket AM3 CPU with DDR2
347 * memory. We blacklist all the cores which do exist in socket AM2+
348 * format. It still isn't perfect, as RB-C2 cores exist in both AM2+
349 * and AM3 formats, but that's the best we can do.
351 return boot_cpu_data
.x86_model
< 4 ||
352 (boot_cpu_data
.x86_model
== 4 && boot_cpu_data
.x86_stepping
<= 2);
355 static const struct hwmon_channel_info
* const k10temp_info
[] = {
356 HWMON_CHANNEL_INFO(temp
,
357 HWMON_T_INPUT
| HWMON_T_MAX
|
358 HWMON_T_CRIT
| HWMON_T_CRIT_HYST
|
360 HWMON_T_INPUT
| HWMON_T_LABEL
,
361 HWMON_T_INPUT
| HWMON_T_LABEL
,
362 HWMON_T_INPUT
| HWMON_T_LABEL
,
363 HWMON_T_INPUT
| HWMON_T_LABEL
,
364 HWMON_T_INPUT
| HWMON_T_LABEL
,
365 HWMON_T_INPUT
| HWMON_T_LABEL
,
366 HWMON_T_INPUT
| HWMON_T_LABEL
,
367 HWMON_T_INPUT
| HWMON_T_LABEL
,
368 HWMON_T_INPUT
| HWMON_T_LABEL
,
369 HWMON_T_INPUT
| HWMON_T_LABEL
,
370 HWMON_T_INPUT
| HWMON_T_LABEL
,
371 HWMON_T_INPUT
| HWMON_T_LABEL
,
372 HWMON_T_INPUT
| HWMON_T_LABEL
),
376 static const struct hwmon_ops k10temp_hwmon_ops
= {
377 .is_visible
= k10temp_is_visible
,
378 .read
= k10temp_read
,
379 .read_string
= k10temp_read_labels
,
382 static const struct hwmon_chip_info k10temp_chip_info
= {
383 .ops
= &k10temp_hwmon_ops
,
384 .info
= k10temp_info
,
387 static void k10temp_get_ccd_support(struct k10temp_data
*data
, int limit
)
392 for (i
= 0; i
< limit
; i
++) {
394 * Ignore inaccessible CCDs.
396 * Some systems will return a register value of 0, and the TEMP_VALID
397 * bit check below will naturally fail.
399 * Other systems will return a PCI_ERROR_RESPONSE (0xFFFFFFFF) for
400 * the register value. And this will incorrectly pass the TEMP_VALID
403 if (read_ccd_temp_reg(data
, i
, ®val
))
406 if (regval
& ZEN_CCD_TEMP_VALID
)
407 data
->show_temp
|= BIT(TCCD_BIT(i
));
411 static int k10temp_probe(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
413 int unreliable
= has_erratum_319(pdev
);
414 struct device
*dev
= &pdev
->dev
;
415 struct k10temp_data
*data
;
416 struct device
*hwmon_dev
;
422 "unreliable CPU thermal sensor; monitoring disabled\n");
426 "unreliable CPU thermal sensor; check erratum 319\n");
429 data
= devm_kzalloc(dev
, sizeof(*data
), GFP_KERNEL
);
434 data
->show_temp
|= BIT(TCTL_BIT
); /* Always show Tctl */
436 if (boot_cpu_data
.x86
== 0x17 &&
437 strstr(boot_cpu_data
.x86_model_id
, AMD_I3255_STR
)) {
438 data
->disp_negative
= true;
441 data
->is_zen
= cpu_feature_enabled(X86_FEATURE_ZEN
);
443 data
->temp_adjust_mask
= ZEN_CUR_TEMP_RANGE_SEL_MASK
;
444 data
->read_tempreg
= read_tempreg_nb_zen
;
445 } else if (boot_cpu_data
.x86
== 0x15 &&
446 ((boot_cpu_data
.x86_model
& 0xf0) == 0x60 ||
447 (boot_cpu_data
.x86_model
& 0xf0) == 0x70)) {
448 data
->read_htcreg
= read_htcreg_nb_f15
;
449 data
->read_tempreg
= read_tempreg_nb_f15
;
451 data
->read_htcreg
= read_htcreg_pci
;
452 data
->read_tempreg
= read_tempreg_pci
;
455 if (boot_cpu_data
.x86
== 0x17 || boot_cpu_data
.x86
== 0x18) {
456 switch (boot_cpu_data
.x86_model
) {
459 case 0x11: /* Zen APU */
460 case 0x18: /* Zen+ APU */
461 data
->ccd_offset
= 0x154;
462 k10temp_get_ccd_support(data
, 4);
464 case 0x31: /* Zen2 Threadripper */
465 case 0x60: /* Renoir */
466 case 0x68: /* Lucienne */
467 case 0x71: /* Zen2 */
468 data
->ccd_offset
= 0x154;
469 k10temp_get_ccd_support(data
, 8);
472 data
->ccd_offset
= 0x300;
473 k10temp_get_ccd_support(data
, 8);
476 } else if (boot_cpu_data
.x86
== 0x19) {
477 switch (boot_cpu_data
.x86_model
) {
478 case 0x0 ... 0x1: /* Zen3 SP3/TR */
479 case 0x8: /* Zen3 TR Chagall */
480 case 0x21: /* Zen3 Ryzen Desktop */
481 case 0x50 ... 0x5f: /* Green Sardine */
482 data
->ccd_offset
= 0x154;
483 k10temp_get_ccd_support(data
, 8);
485 case 0x40 ... 0x4f: /* Yellow Carp */
486 data
->ccd_offset
= 0x300;
487 k10temp_get_ccd_support(data
, 8);
491 data
->ccd_offset
= 0x308;
492 k10temp_get_ccd_support(data
, 8);
496 data
->ccd_offset
= 0x300;
497 k10temp_get_ccd_support(data
, 12);
502 for (i
= 0; i
< ARRAY_SIZE(tctl_offset_table
); i
++) {
503 const struct tctl_offset
*entry
= &tctl_offset_table
[i
];
505 if (boot_cpu_data
.x86
== entry
->model
&&
506 strstr(boot_cpu_data
.x86_model_id
, entry
->id
)) {
507 data
->show_temp
|= BIT(TDIE_BIT
); /* show Tdie */
508 data
->temp_offset
= entry
->offset
;
513 hwmon_dev
= devm_hwmon_device_register_with_info(dev
, "k10temp", data
,
516 return PTR_ERR_OR_ZERO(hwmon_dev
);
519 static const struct pci_device_id k10temp_id_table
[] = {
520 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_10H_NB_MISC
) },
521 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_11H_NB_MISC
) },
522 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_CNB17H_F3
) },
523 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_15H_NB_F3
) },
524 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_15H_M10H_F3
) },
525 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_15H_M30H_NB_F3
) },
526 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_15H_M60H_NB_F3
) },
527 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_15H_M70H_NB_F3
) },
528 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_16H_NB_F3
) },
529 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_16H_M30H_NB_F3
) },
530 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_17H_DF_F3
) },
531 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_17H_M10H_DF_F3
) },
532 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_17H_M30H_DF_F3
) },
533 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_17H_M60H_DF_F3
) },
534 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_17H_M70H_DF_F3
) },
535 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_17H_MA0H_DF_F3
) },
536 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_19H_DF_F3
) },
537 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_19H_M10H_DF_F3
) },
538 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_19H_M40H_DF_F3
) },
539 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_19H_M50H_DF_F3
) },
540 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_19H_M60H_DF_F3
) },
541 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_19H_M70H_DF_F3
) },
542 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_19H_M78H_DF_F3
) },
543 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_1AH_M00H_DF_F3
) },
544 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_1AH_M20H_DF_F3
) },
545 { PCI_VDEVICE(AMD
, PCI_DEVICE_ID_AMD_1AH_M60H_DF_F3
) },
546 { PCI_VDEVICE(HYGON
, PCI_DEVICE_ID_AMD_17H_DF_F3
) },
549 MODULE_DEVICE_TABLE(pci
, k10temp_id_table
);
551 static struct pci_driver k10temp_driver
= {
553 .id_table
= k10temp_id_table
,
554 .probe
= k10temp_probe
,
557 module_pci_driver(k10temp_driver
);