Zen CPUs report core and SoC voltages and currents. Add support for it to the k10temp driver. Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx> --- drivers/hwmon/k10temp.c | 116 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 113 insertions(+), 3 deletions(-) diff --git a/drivers/hwmon/k10temp.c b/drivers/hwmon/k10temp.c index 944ba8008bc4..bce862bacbc5 100644 --- a/drivers/hwmon/k10temp.c +++ b/drivers/hwmon/k10temp.c @@ -11,6 +11,13 @@ * 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. + * - Register addresses to read chip voltage and current is also from + * https://github.com/ocerman/zenpower, and not confirmed from chip + * datasheets. Experiments suggest that reported current and voltage + * information is reasonable. + * - It is unknown if the mechanism to read CCD1/CCD2 temperature as well as + * current and voltage information works on higher-end Ryzen CPUs, or if + * additional information is available on those CPUs. */ #include <linux/bitops.h> @@ -70,6 +77,10 @@ static DEFINE_MUTEX(nb_smu_ind_mutex); #define F17H_M70H_CCD1_TEMP 0x00059954 #define F17H_M70H_CCD2_TEMP 0x00059958 +#define F17H_M01H_SVI 0x0005A000 +#define F17H_M01H_SVI_TEL_PLANE0 (F17H_M01H_SVI + 0xc) +#define F17H_M01H_SVI_TEL_PLANE1 (F17H_M01H_SVI + 0x10) + #define CUR_TEMP_SHIFT 21 #define CUR_TEMP_RANGE_SEL_MASK BIT(19) @@ -82,6 +93,9 @@ struct k10temp_data { bool show_tdie; bool show_tccd1; bool show_tccd2; + u32 svi_addr[2]; + bool show_current; + int cfactor[2]; }; struct tctl_offset { @@ -157,16 +171,76 @@ const char *k10temp_temp_label[] = { "Tccd2", }; +const char *k10temp_in_label[] = { + "Vcore", + "Vsoc", +}; + +const char *k10temp_curr_label[] = { + "Icore", + "Isoc", +}; + static int k10temp_read_labels(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, const char **str) { - *str = k10temp_temp_label[channel]; + switch (type) { + case hwmon_temp: + *str = k10temp_temp_label[channel]; + break; + case hwmon_in: + *str = k10temp_in_label[channel]; + break; + case hwmon_curr: + *str = k10temp_curr_label[channel]; + break; + default: + return -EOPNOTSUPP; + } return 0; } -static int k10temp_read(struct device *dev, enum hwmon_sensor_types type, - u32 attr, int channel, long *val) +static int k10temp_read_curr(struct device *dev, u32 attr, int channel, + long *val) +{ + struct k10temp_data *data = dev_get_drvdata(dev); + u32 regval; + + switch (attr) { + case hwmon_curr_input: + amd_smn_read(amd_pci_dev_to_node_id(data->pdev), + data->svi_addr[channel], ®val); + *val = DIV_ROUND_CLOSEST(data->cfactor[channel] * + (regval & 0xff), + 1000); + break; + default: + return -EOPNOTSUPP; + } + return 0; +} + +static int k10temp_read_in(struct device *dev, u32 attr, int channel, long *val) +{ + struct k10temp_data *data = dev_get_drvdata(dev); + u32 regval; + + switch (attr) { + case hwmon_in_input: + amd_smn_read(amd_pci_dev_to_node_id(data->pdev), + data->svi_addr[channel], ®val); + regval = (regval >> 16) & 0xff; + *val = 1550 - DIV_ROUND_CLOSEST(625 * regval, 100); + 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; @@ -216,6 +290,21 @@ static int k10temp_read(struct device *dev, enum hwmon_sensor_types type, 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); + case hwmon_in: + return k10temp_read_in(dev, attr, channel, val); + case hwmon_curr: + return k10temp_read_curr(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) @@ -290,6 +379,11 @@ static umode_t k10temp_is_visible(const void *_data, return 0; } break; + case hwmon_in: + case hwmon_curr: + if (!data->show_current) + return 0; + break; default: return 0; } @@ -338,6 +432,12 @@ static const struct hwmon_channel_info *k10temp_info[] = { 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 }; @@ -393,8 +493,18 @@ static int k10temp_probe(struct pci_dev *pdev, const struct pci_device_id *id) case 0x8: /* Zen+ */ case 0x11: /* Zen APU */ case 0x18: /* Zen+ APU */ + data->show_current = true; + data->svi_addr[0] = F17H_M01H_SVI_TEL_PLANE0; + data->svi_addr[1] = F17H_M01H_SVI_TEL_PLANE1; + data->cfactor[0] = 1039211; /* core */ + data->cfactor[1] = 360772; /* SoC */ break; case 0x71: /* Zen2 */ + data->show_current = true; + data->cfactor[0] = 658823; /* core */ + data->cfactor[1] = 294300; /* SoC */ + data->svi_addr[0] = F17H_M01H_SVI_TEL_PLANE1; + data->svi_addr[1] = F17H_M01H_SVI_TEL_PLANE0; amd_smn_read(amd_pci_dev_to_node_id(pdev), F17H_M70H_CCD1_TEMP, ®val); if (regval & 0xfff) -- 2.17.1
