| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * k10temp.c - AMD Family 10h/11h/12h/14h/15h/16h processor hardware monitoring |
| * |
| * Copyright (c) 2009 Clemens Ladisch <clemens@ladisch.de> |
| */ |
| |
| #include <linux/err.h> |
| #include <linux/hwmon.h> |
| #include <linux/hwmon-sysfs.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 0xf0000000 |
| #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 0x00000100 |
| |
| /* miscellaneous (PCI function 3) */ |
| #define REG_HARDWARE_THERMAL_CONTROL 0x64 |
| #define HTC_ENABLE 0x00000001 |
| |
| #define REG_REPORTED_TEMPERATURE 0xa4 |
| |
| #define REG_NORTHBRIDGE_CAPABILITIES 0xe8 |
| #define NB_CAP_HTC 0x00000400 |
| |
| /* |
| * 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 |
| |
| /* F17h M01h Access througn SMN */ |
| #define F17H_M01H_REPORTED_TEMP_CTRL_OFFSET 0x00059800 |
| |
| 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; |
| bool show_tdie; |
| }; |
| |
| 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_f17(struct pci_dev *pdev, u32 *regval) |
| { |
| amd_smn_read(amd_pci_dev_to_node_id(pdev), |
| F17H_M01H_REPORTED_TEMP_CTRL_OFFSET, regval); |
| } |
| |
| static unsigned int get_raw_temp(struct k10temp_data *data) |
| { |
| unsigned int temp; |
| u32 regval; |
| |
| data->read_tempreg(data->pdev, ®val); |
| temp = (regval >> 21) * 125; |
| if (regval & data->temp_adjust_mask) |
| temp -= 49000; |
| return temp; |
| } |
| |
| static ssize_t temp1_input_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct k10temp_data *data = dev_get_drvdata(dev); |
| unsigned int temp = get_raw_temp(data); |
| |
| if (temp > data->temp_offset) |
| temp -= data->temp_offset; |
| else |
| temp = 0; |
| |
| return sprintf(buf, "%u\n", temp); |
| } |
| |
| static ssize_t temp2_input_show(struct device *dev, |
| struct device_attribute *devattr, char *buf) |
| { |
| struct k10temp_data *data = dev_get_drvdata(dev); |
| unsigned int temp = get_raw_temp(data); |
| |
| return sprintf(buf, "%u\n", temp); |
| } |
| |
| static ssize_t temp_label_show(struct device *dev, |
| struct device_attribute *devattr, char *buf) |
| { |
| struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| |
| return sprintf(buf, "%s\n", attr->index ? "Tctl" : "Tdie"); |
| } |
| |
| static ssize_t temp1_max_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| return sprintf(buf, "%d\n", 70 * 1000); |
| } |
| |
| static ssize_t temp_crit_show(struct device *dev, |
| struct device_attribute *devattr, char *buf) |
| { |
| struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| struct k10temp_data *data = dev_get_drvdata(dev); |
| int show_hyst = attr->index; |
| u32 regval; |
| int value; |
| |
| data->read_htcreg(data->pdev, ®val); |
| value = ((regval >> 16) & 0x7f) * 500 + 52000; |
| if (show_hyst) |
| value -= ((regval >> 24) & 0xf) * 500; |
| return sprintf(buf, "%d\n", value); |
| } |
| |
| static DEVICE_ATTR_RO(temp1_input); |
| static DEVICE_ATTR_RO(temp1_max); |
| static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_crit, 0); |
| static SENSOR_DEVICE_ATTR_RO(temp1_crit_hyst, temp_crit, 1); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp1_label, temp_label, 0); |
| static DEVICE_ATTR_RO(temp2_input); |
| static SENSOR_DEVICE_ATTR_RO(temp2_label, temp_label, 1); |
| |
| static umode_t k10temp_is_visible(struct kobject *kobj, |
| struct attribute *attr, int index) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct k10temp_data *data = dev_get_drvdata(dev); |
| struct pci_dev *pdev = data->pdev; |
| u32 reg; |
| |
| switch (index) { |
| case 0 ... 1: /* temp1_input, temp1_max */ |
| default: |
| break; |
| case 2 ... 3: /* temp1_crit, temp1_crit_hyst */ |
| if (!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 4 ... 6: /* temp1_label, temp2_input, temp2_label */ |
| if (!data->show_tdie) |
| return 0; |
| break; |
| } |
| return attr->mode; |
| } |
| |
| static struct attribute *k10temp_attrs[] = { |
| &dev_attr_temp1_input.attr, |
| &dev_attr_temp1_max.attr, |
| &sensor_dev_attr_temp1_crit.dev_attr.attr, |
| &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, |
| &sensor_dev_attr_temp1_label.dev_attr.attr, |
| &dev_attr_temp2_input.attr, |
| &sensor_dev_attr_temp2_label.dev_attr.attr, |
| NULL |
| }; |
| |
| static const struct attribute_group k10temp_group = { |
| .attrs = k10temp_attrs, |
| .is_visible = k10temp_is_visible, |
| }; |
| __ATTRIBUTE_GROUPS(k10temp); |
| |
| 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 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; |
| |
| 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 = 0x80000; |
| data->read_tempreg = read_tempreg_nb_f17; |
| data->show_tdie = true; |
| } 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_groups(dev, "k10temp", data, |
| k10temp_groups); |
| 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(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); |
