| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * k10temp.c - AMD Family 10h/11h/12h/14h/15h/16h/17h |
| * processor hardware monitoring |
| * |
| * Copyright (c) 2009 Clemens Ladisch <clemens@ladisch.de> |
| * Copyright (c) 2020 Guenter Roeck <linux@roeck-us.net> |
| * |
| * Implementation notes: |
| * - CCD register address information as well as the calculation to |
| * convert raw register values is from https://github.com/ocerman/zenpower. |
| * The information is not confirmed from chip datasheets, but experiments |
| * suggest that it provides reasonable temperature values. |
| */ |
| |
| #include <linux/bitops.h> |
| #include <linux/err.h> |
| #include <linux/hwmon.h> |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| #include <linux/pci_ids.h> |
| #include <asm/amd_nb.h> |
| #include <asm/processor.h> |
| |
| MODULE_DESCRIPTION("AMD Family 10h+ CPU core temperature monitor"); |
| MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); |
| MODULE_LICENSE("GPL"); |
| |
| static bool force; |
| module_param(force, bool, 0444); |
| MODULE_PARM_DESC(force, "force loading on processors with erratum 319"); |
| |
| /* Provide lock for writing to NB_SMU_IND_ADDR */ |
| static DEFINE_MUTEX(nb_smu_ind_mutex); |
| |
| #ifndef PCI_DEVICE_ID_AMD_15H_M70H_NB_F3 |
| #define PCI_DEVICE_ID_AMD_15H_M70H_NB_F3 0x15b3 |
| #endif |
| |
| /* CPUID function 0x80000001, ebx */ |
| #define CPUID_PKGTYPE_MASK GENMASK(31, 28) |
| #define CPUID_PKGTYPE_F 0x00000000 |
| #define CPUID_PKGTYPE_AM2R2_AM3 0x10000000 |
| |
| /* DRAM controller (PCI function 2) */ |
| #define REG_DCT0_CONFIG_HIGH 0x094 |
| #define DDR3_MODE BIT(8) |
| |
| /* miscellaneous (PCI function 3) */ |
| #define REG_HARDWARE_THERMAL_CONTROL 0x64 |
| #define HTC_ENABLE BIT(0) |
| |
| #define REG_REPORTED_TEMPERATURE 0xa4 |
| |
| #define REG_NORTHBRIDGE_CAPABILITIES 0xe8 |
| #define NB_CAP_HTC BIT(10) |
| |
| /* |
| * For F15h M60h and M70h, REG_HARDWARE_THERMAL_CONTROL |
| * and REG_REPORTED_TEMPERATURE have been moved to |
| * D0F0xBC_xD820_0C64 [Hardware Temperature Control] |
| * D0F0xBC_xD820_0CA4 [Reported Temperature Control] |
| */ |
| #define F15H_M60H_HARDWARE_TEMP_CTRL_OFFSET 0xd8200c64 |
| #define F15H_M60H_REPORTED_TEMP_CTRL_OFFSET 0xd8200ca4 |
| |
| /* Common for Zen CPU families (Family 17h and 18h) */ |
| #define ZEN_REPORTED_TEMP_CTRL_OFFSET 0x00059800 |
| |
| #define ZEN_CCD_TEMP(x) (0x00059954 + ((x) * 4)) |
| #define ZEN_CCD_TEMP_VALID BIT(11) |
| #define ZEN_CCD_TEMP_MASK GENMASK(10, 0) |
| |
| #define ZEN_CUR_TEMP_SHIFT 21 |
| #define ZEN_CUR_TEMP_RANGE_SEL_MASK BIT(19) |
| |
| #define ZEN_SVI_BASE 0x0005A000 |
| |
| /* F17h thermal registers through SMN */ |
| #define F17H_M01H_SVI_TEL_PLANE0 (ZEN_SVI_BASE + 0xc) |
| #define F17H_M01H_SVI_TEL_PLANE1 (ZEN_SVI_BASE + 0x10) |
| #define F17H_M31H_SVI_TEL_PLANE0 (ZEN_SVI_BASE + 0x14) |
| #define F17H_M31H_SVI_TEL_PLANE1 (ZEN_SVI_BASE + 0x10) |
| |
| #define F17H_M01H_CFACTOR_ICORE 1000000 /* 1A / LSB */ |
| #define F17H_M01H_CFACTOR_ISOC 250000 /* 0.25A / LSB */ |
| #define F17H_M31H_CFACTOR_ICORE 1000000 /* 1A / LSB */ |
| #define F17H_M31H_CFACTOR_ISOC 310000 /* 0.31A / LSB */ |
| |
| /* F19h thermal registers through SMN */ |
| #define F19H_M01_SVI_TEL_PLANE0 (ZEN_SVI_BASE + 0x14) |
| #define F19H_M01_SVI_TEL_PLANE1 (ZEN_SVI_BASE + 0x10) |
| |
| #define F19H_M01H_CFACTOR_ICORE 1000000 /* 1A / LSB */ |
| #define F19H_M01H_CFACTOR_ISOC 310000 /* 0.31A / LSB */ |
| |
| struct k10temp_data { |
| struct pci_dev *pdev; |
| void (*read_htcreg)(struct pci_dev *pdev, u32 *regval); |
| void (*read_tempreg)(struct pci_dev *pdev, u32 *regval); |
| int temp_offset; |
| u32 temp_adjust_mask; |
| u32 show_temp; |
| bool is_zen; |
| }; |
| |
| #define TCTL_BIT 0 |
| #define TDIE_BIT 1 |
| #define TCCD_BIT(x) ((x) + 2) |
| |
| #define HAVE_TEMP(d, channel) ((d)->show_temp & BIT(channel)) |
| #define HAVE_TDIE(d) HAVE_TEMP(d, TDIE_BIT) |
| |
| struct tctl_offset { |
| u8 model; |
| char const *id; |
| int offset; |
| }; |
| |
| static const struct tctl_offset tctl_offset_table[] = { |
| { 0x17, "AMD Ryzen 5 1600X", 20000 }, |
| { 0x17, "AMD Ryzen 7 1700X", 20000 }, |
| { 0x17, "AMD Ryzen 7 1800X", 20000 }, |
| { 0x17, "AMD Ryzen 7 2700X", 10000 }, |
| { 0x17, "AMD Ryzen Threadripper 19", 27000 }, /* 19{00,20,50}X */ |
| { 0x17, "AMD Ryzen Threadripper 29", 27000 }, /* 29{20,50,70,90}[W]X */ |
| }; |
| |
| static void read_htcreg_pci(struct pci_dev *pdev, u32 *regval) |
| { |
| pci_read_config_dword(pdev, REG_HARDWARE_THERMAL_CONTROL, regval); |
| } |
| |
| static void read_tempreg_pci(struct pci_dev *pdev, u32 *regval) |
| { |
| pci_read_config_dword(pdev, REG_REPORTED_TEMPERATURE, regval); |
| } |
| |
| static void amd_nb_index_read(struct pci_dev *pdev, unsigned int devfn, |
| unsigned int base, int offset, u32 *val) |
| { |
| mutex_lock(&nb_smu_ind_mutex); |
| pci_bus_write_config_dword(pdev->bus, devfn, |
| base, offset); |
| pci_bus_read_config_dword(pdev->bus, devfn, |
| base + 4, val); |
| mutex_unlock(&nb_smu_ind_mutex); |
| } |
| |
| static void read_htcreg_nb_f15(struct pci_dev *pdev, u32 *regval) |
| { |
| amd_nb_index_read(pdev, PCI_DEVFN(0, 0), 0xb8, |
| F15H_M60H_HARDWARE_TEMP_CTRL_OFFSET, regval); |
| } |
| |
| static void read_tempreg_nb_f15(struct pci_dev *pdev, u32 *regval) |
| { |
| amd_nb_index_read(pdev, PCI_DEVFN(0, 0), 0xb8, |
| F15H_M60H_REPORTED_TEMP_CTRL_OFFSET, regval); |
| } |
| |
| static void read_tempreg_nb_zen(struct pci_dev *pdev, u32 *regval) |
| { |
| amd_smn_read(amd_pci_dev_to_node_id(pdev), |
| ZEN_REPORTED_TEMP_CTRL_OFFSET, regval); |
| } |
| |
| static long get_raw_temp(struct k10temp_data *data) |
| { |
| u32 regval; |
| long temp; |
| |
| data->read_tempreg(data->pdev, ®val); |
| temp = (regval >> ZEN_CUR_TEMP_SHIFT) * 125; |
| if (regval & data->temp_adjust_mask) |
| temp -= 49000; |
| return temp; |
| } |
| |
| static const char *k10temp_temp_label[] = { |
| "Tctl", |
| "Tdie", |
| "Tccd1", |
| "Tccd2", |
| "Tccd3", |
| "Tccd4", |
| "Tccd5", |
| "Tccd6", |
| "Tccd7", |
| "Tccd8", |
| }; |
| |
| static int k10temp_read_labels(struct device *dev, |
| enum hwmon_sensor_types type, |
| u32 attr, int channel, const char **str) |
| { |
| switch (type) { |
| case hwmon_temp: |
| *str = k10temp_temp_label[channel]; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| return 0; |
| } |
| |
| static int k10temp_read_temp(struct device *dev, u32 attr, int channel, |
| long *val) |
| { |
| struct k10temp_data *data = dev_get_drvdata(dev); |
| u32 regval; |
| |
| switch (attr) { |
| case hwmon_temp_input: |
| switch (channel) { |
| case 0: /* Tctl */ |
| *val = get_raw_temp(data); |
| if (*val < 0) |
| *val = 0; |
| break; |
| case 1: /* Tdie */ |
| *val = get_raw_temp(data) - data->temp_offset; |
| if (*val < 0) |
| *val = 0; |
| break; |
| case 2 ... 9: /* Tccd{1-8} */ |
| amd_smn_read(amd_pci_dev_to_node_id(data->pdev), |
| ZEN_CCD_TEMP(channel - 2), ®val); |
| *val = (regval & ZEN_CCD_TEMP_MASK) * 125 - 49000; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| break; |
| case hwmon_temp_max: |
| *val = 70 * 1000; |
| break; |
| case hwmon_temp_crit: |
| data->read_htcreg(data->pdev, ®val); |
| *val = ((regval >> 16) & 0x7f) * 500 + 52000; |
| break; |
| case hwmon_temp_crit_hyst: |
| data->read_htcreg(data->pdev, ®val); |
| *val = (((regval >> 16) & 0x7f) |
| - ((regval >> 24) & 0xf)) * 500 + 52000; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| return 0; |
| } |
| |
| static int k10temp_read(struct device *dev, enum hwmon_sensor_types type, |
| u32 attr, int channel, long *val) |
| { |
| switch (type) { |
| case hwmon_temp: |
| return k10temp_read_temp(dev, attr, channel, val); |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static umode_t k10temp_is_visible(const void *_data, |
| enum hwmon_sensor_types type, |
| u32 attr, int channel) |
| { |
| const struct k10temp_data *data = _data; |
| struct pci_dev *pdev = data->pdev; |
| u32 reg; |
| |
| switch (type) { |
| case hwmon_temp: |
| switch (attr) { |
| case hwmon_temp_input: |
| if (!HAVE_TEMP(data, channel)) |
| return 0; |
| break; |
| case hwmon_temp_max: |
| if (channel || data->is_zen) |
| return 0; |
| break; |
| case hwmon_temp_crit: |
| case hwmon_temp_crit_hyst: |
| if (channel || !data->read_htcreg) |
| return 0; |
| |
| pci_read_config_dword(pdev, |
| REG_NORTHBRIDGE_CAPABILITIES, |
| ®); |
| if (!(reg & NB_CAP_HTC)) |
| return 0; |
| |
| data->read_htcreg(data->pdev, ®); |
| if (!(reg & HTC_ENABLE)) |
| return 0; |
| break; |
| case hwmon_temp_label: |
| /* Show temperature labels only on Zen CPUs */ |
| if (!data->is_zen || !HAVE_TEMP(data, channel)) |
| return 0; |
| break; |
| default: |
| return 0; |
| } |
| break; |
| default: |
| return 0; |
| } |
| return 0444; |
| } |
| |
| static bool has_erratum_319(struct pci_dev *pdev) |
| { |
| u32 pkg_type, reg_dram_cfg; |
| |
| if (boot_cpu_data.x86 != 0x10) |
| return false; |
| |
| /* |
| * Erratum 319: The thermal sensor of Socket F/AM2+ processors |
| * may be unreliable. |
| */ |
| pkg_type = cpuid_ebx(0x80000001) & CPUID_PKGTYPE_MASK; |
| if (pkg_type == CPUID_PKGTYPE_F) |
| return true; |
| if (pkg_type != CPUID_PKGTYPE_AM2R2_AM3) |
| return false; |
| |
| /* DDR3 memory implies socket AM3, which is good */ |
| pci_bus_read_config_dword(pdev->bus, |
| PCI_DEVFN(PCI_SLOT(pdev->devfn), 2), |
| REG_DCT0_CONFIG_HIGH, ®_dram_cfg); |
| if (reg_dram_cfg & DDR3_MODE) |
| return false; |
| |
| /* |
| * Unfortunately it is possible to run a socket AM3 CPU with DDR2 |
| * memory. We blacklist all the cores which do exist in socket AM2+ |
| * format. It still isn't perfect, as RB-C2 cores exist in both AM2+ |
| * and AM3 formats, but that's the best we can do. |
| */ |
| return boot_cpu_data.x86_model < 4 || |
| (boot_cpu_data.x86_model == 4 && boot_cpu_data.x86_stepping <= 2); |
| } |
| |
| static const struct hwmon_channel_info *k10temp_info[] = { |
| HWMON_CHANNEL_INFO(temp, |
| HWMON_T_INPUT | HWMON_T_MAX | |
| HWMON_T_CRIT | HWMON_T_CRIT_HYST | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL), |
| HWMON_CHANNEL_INFO(in, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_LABEL), |
| HWMON_CHANNEL_INFO(curr, |
| HWMON_C_INPUT | HWMON_C_LABEL, |
| HWMON_C_INPUT | HWMON_C_LABEL), |
| NULL |
| }; |
| |
| static const struct hwmon_ops k10temp_hwmon_ops = { |
| .is_visible = k10temp_is_visible, |
| .read = k10temp_read, |
| .read_string = k10temp_read_labels, |
| }; |
| |
| static const struct hwmon_chip_info k10temp_chip_info = { |
| .ops = &k10temp_hwmon_ops, |
| .info = k10temp_info, |
| }; |
| |
| static void k10temp_get_ccd_support(struct pci_dev *pdev, |
| struct k10temp_data *data, int limit) |
| { |
| u32 regval; |
| int i; |
| |
| for (i = 0; i < limit; i++) { |
| amd_smn_read(amd_pci_dev_to_node_id(pdev), |
| ZEN_CCD_TEMP(i), ®val); |
| if (regval & ZEN_CCD_TEMP_VALID) |
| data->show_temp |= BIT(TCCD_BIT(i)); |
| } |
| } |
| |
| static int k10temp_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| { |
| int unreliable = has_erratum_319(pdev); |
| struct device *dev = &pdev->dev; |
| struct k10temp_data *data; |
| struct device *hwmon_dev; |
| int i; |
| |
| if (unreliable) { |
| if (!force) { |
| dev_err(dev, |
| "unreliable CPU thermal sensor; monitoring disabled\n"); |
| return -ENODEV; |
| } |
| dev_warn(dev, |
| "unreliable CPU thermal sensor; check erratum 319\n"); |
| } |
| |
| data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| data->pdev = pdev; |
| data->show_temp |= BIT(TCTL_BIT); /* Always show Tctl */ |
| |
| if (boot_cpu_data.x86 == 0x15 && |
| ((boot_cpu_data.x86_model & 0xf0) == 0x60 || |
| (boot_cpu_data.x86_model & 0xf0) == 0x70)) { |
| data->read_htcreg = read_htcreg_nb_f15; |
| data->read_tempreg = read_tempreg_nb_f15; |
| } else if (boot_cpu_data.x86 == 0x17 || boot_cpu_data.x86 == 0x18) { |
| data->temp_adjust_mask = ZEN_CUR_TEMP_RANGE_SEL_MASK; |
| data->read_tempreg = read_tempreg_nb_zen; |
| data->show_temp |= BIT(TDIE_BIT); /* show Tdie */ |
| data->is_zen = true; |
| |
| switch (boot_cpu_data.x86_model) { |
| case 0x1: /* Zen */ |
| case 0x8: /* Zen+ */ |
| case 0x11: /* Zen APU */ |
| case 0x18: /* Zen+ APU */ |
| k10temp_get_ccd_support(pdev, data, 4); |
| break; |
| case 0x31: /* Zen2 Threadripper */ |
| case 0x71: /* Zen2 */ |
| k10temp_get_ccd_support(pdev, data, 8); |
| break; |
| } |
| } else if (boot_cpu_data.x86 == 0x19) { |
| data->temp_adjust_mask = ZEN_CUR_TEMP_RANGE_SEL_MASK; |
| data->read_tempreg = read_tempreg_nb_zen; |
| data->show_temp |= BIT(TDIE_BIT); |
| data->is_zen = true; |
| |
| switch (boot_cpu_data.x86_model) { |
| case 0x0 ... 0x1: /* Zen3 SP3/TR */ |
| case 0x21: /* Zen3 Ryzen Desktop */ |
| k10temp_get_ccd_support(pdev, data, 8); |
| break; |
| } |
| } else { |
| data->read_htcreg = read_htcreg_pci; |
| data->read_tempreg = read_tempreg_pci; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(tctl_offset_table); i++) { |
| const struct tctl_offset *entry = &tctl_offset_table[i]; |
| |
| if (boot_cpu_data.x86 == entry->model && |
| strstr(boot_cpu_data.x86_model_id, entry->id)) { |
| data->temp_offset = entry->offset; |
| break; |
| } |
| } |
| |
| hwmon_dev = devm_hwmon_device_register_with_info(dev, "k10temp", data, |
| &k10temp_chip_info, |
| NULL); |
| return PTR_ERR_OR_ZERO(hwmon_dev); |
| } |
| |
| static const struct pci_device_id k10temp_id_table[] = { |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_11H_NB_MISC) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CNB17H_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_NB_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M10H_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M30H_NB_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M60H_NB_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M70H_NB_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_NB_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_M30H_NB_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_DF_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M10H_DF_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M30H_DF_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M60H_DF_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_17H_M70H_DF_F3) }, |
| { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_19H_DF_F3) }, |
| { PCI_VDEVICE(HYGON, PCI_DEVICE_ID_AMD_17H_DF_F3) }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(pci, k10temp_id_table); |
| |
| static struct pci_driver k10temp_driver = { |
| .name = "k10temp", |
| .id_table = k10temp_id_table, |
| .probe = k10temp_probe, |
| }; |
| |
| module_pci_driver(k10temp_driver); |
