diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c | 941 |
1 files changed, 941 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c new file mode 100644 index 000000000..0fd290d77 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c @@ -0,0 +1,941 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/device.h> +#include <linux/sysfs.h> +#include <linux/hwmon.h> +#include <linux/err.h> +#include <linux/sfp.h> + +#include "core.h" +#include "core_env.h" + +#define MLXSW_HWMON_SENSORS_MAX_COUNT 64 +#define MLXSW_HWMON_MODULES_MAX_COUNT 64 +#define MLXSW_HWMON_GEARBOXES_MAX_COUNT 32 + +#define MLXSW_HWMON_ATTR_PER_SENSOR 3 +#define MLXSW_HWMON_ATTR_PER_MODULE 7 +#define MLXSW_HWMON_ATTR_PER_GEARBOX 4 +#define MLXSW_HWMON_DEV_NAME_LEN_MAX 16 + +#define MLXSW_HWMON_ATTR_COUNT (MLXSW_HWMON_SENSORS_MAX_COUNT * MLXSW_HWMON_ATTR_PER_SENSOR + \ + MLXSW_HWMON_MODULES_MAX_COUNT * MLXSW_HWMON_ATTR_PER_MODULE + \ + MLXSW_HWMON_GEARBOXES_MAX_COUNT * MLXSW_HWMON_ATTR_PER_GEARBOX + \ + MLXSW_MFCR_TACHOS_MAX + MLXSW_MFCR_PWMS_MAX) + +struct mlxsw_hwmon_attr { + struct device_attribute dev_attr; + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev; + unsigned int type_index; + char name[32]; +}; + +static int mlxsw_hwmon_get_attr_index(int index, int count) +{ + if (index >= count) + return index % count + MLXSW_REG_MTMP_GBOX_INDEX_MIN; + + return index; +} + +struct mlxsw_hwmon_dev { + char name[MLXSW_HWMON_DEV_NAME_LEN_MAX]; + struct mlxsw_hwmon *hwmon; + struct device *hwmon_dev; + struct attribute_group group; + const struct attribute_group *groups[2]; + struct attribute *attrs[MLXSW_HWMON_ATTR_COUNT + 1]; + struct mlxsw_hwmon_attr hwmon_attrs[MLXSW_HWMON_ATTR_COUNT]; + unsigned int attrs_count; + u8 sensor_count; + u8 module_sensor_max; + u8 slot_index; + bool active; +}; + +struct mlxsw_hwmon { + struct mlxsw_core *core; + const struct mlxsw_bus_info *bus_info; + struct mlxsw_hwmon_dev line_cards[]; +}; + +static ssize_t mlxsw_hwmon_temp_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mtmp_pl[MLXSW_REG_MTMP_LEN]; + int temp, index; + int err; + + index = mlxsw_hwmon_get_attr_index(mlxsw_hwmon_attr->type_index, + mlxsw_hwmon_dev->module_sensor_max); + mlxsw_reg_mtmp_pack(mtmp_pl, mlxsw_hwmon_dev->slot_index, index, false, + false); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query temp sensor\n"); + return err; + } + mlxsw_reg_mtmp_unpack(mtmp_pl, &temp, NULL, NULL, NULL, NULL); + return sprintf(buf, "%d\n", temp); +} + +static ssize_t mlxsw_hwmon_temp_max_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mtmp_pl[MLXSW_REG_MTMP_LEN]; + int temp_max, index; + int err; + + index = mlxsw_hwmon_get_attr_index(mlxsw_hwmon_attr->type_index, + mlxsw_hwmon_dev->module_sensor_max); + mlxsw_reg_mtmp_pack(mtmp_pl, mlxsw_hwmon_dev->slot_index, index, false, + false); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query temp sensor\n"); + return err; + } + mlxsw_reg_mtmp_unpack(mtmp_pl, NULL, &temp_max, NULL, NULL, NULL); + return sprintf(buf, "%d\n", temp_max); +} + +static ssize_t mlxsw_hwmon_temp_rst_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mtmp_pl[MLXSW_REG_MTMP_LEN]; + unsigned long val; + int index; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + if (val != 1) + return -EINVAL; + + index = mlxsw_hwmon_get_attr_index(mlxsw_hwmon_attr->type_index, + mlxsw_hwmon_dev->module_sensor_max); + + mlxsw_reg_mtmp_slot_index_set(mtmp_pl, mlxsw_hwmon_dev->slot_index); + mlxsw_reg_mtmp_sensor_index_set(mtmp_pl, index); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl); + if (err) + return err; + mlxsw_reg_mtmp_mte_set(mtmp_pl, true); + mlxsw_reg_mtmp_mtr_set(mtmp_pl, true); + err = mlxsw_reg_write(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to reset temp sensor history\n"); + return err; + } + return len; +} + +static ssize_t mlxsw_hwmon_fan_rpm_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mfsm_pl[MLXSW_REG_MFSM_LEN]; + int err; + + mlxsw_reg_mfsm_pack(mfsm_pl, mlxsw_hwmon_attr->type_index); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mfsm), mfsm_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query fan\n"); + return err; + } + return sprintf(buf, "%u\n", mlxsw_reg_mfsm_rpm_get(mfsm_pl)); +} + +static ssize_t mlxsw_hwmon_fan_fault_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char fore_pl[MLXSW_REG_FORE_LEN]; + bool fault; + int err; + + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(fore), fore_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query fan\n"); + return err; + } + mlxsw_reg_fore_unpack(fore_pl, mlxsw_hwmon_attr->type_index, &fault); + + return sprintf(buf, "%u\n", fault); +} + +static ssize_t mlxsw_hwmon_pwm_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mfsc_pl[MLXSW_REG_MFSC_LEN]; + int err; + + mlxsw_reg_mfsc_pack(mfsc_pl, mlxsw_hwmon_attr->type_index, 0); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mfsc), mfsc_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query PWM\n"); + return err; + } + return sprintf(buf, "%u\n", + mlxsw_reg_mfsc_pwm_duty_cycle_get(mfsc_pl)); +} + +static ssize_t mlxsw_hwmon_pwm_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mfsc_pl[MLXSW_REG_MFSC_LEN]; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + if (val > 255) + return -EINVAL; + + mlxsw_reg_mfsc_pack(mfsc_pl, mlxsw_hwmon_attr->type_index, val); + err = mlxsw_reg_write(mlxsw_hwmon->core, MLXSW_REG(mfsc), mfsc_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to write PWM\n"); + return err; + } + return len; +} + +static int mlxsw_hwmon_module_temp_get(struct device *dev, + struct device_attribute *attr, + int *p_temp) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mtmp_pl[MLXSW_REG_MTMP_LEN]; + u8 module; + int err; + + module = mlxsw_hwmon_attr->type_index - mlxsw_hwmon_dev->sensor_count; + mlxsw_reg_mtmp_pack(mtmp_pl, mlxsw_hwmon_dev->slot_index, + MLXSW_REG_MTMP_MODULE_INDEX_MIN + module, false, + false); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl); + if (err) { + dev_err(dev, "Failed to query module temperature\n"); + return err; + } + mlxsw_reg_mtmp_unpack(mtmp_pl, p_temp, NULL, NULL, NULL, NULL); + + return 0; +} + +static ssize_t mlxsw_hwmon_module_temp_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int err, temp; + + err = mlxsw_hwmon_module_temp_get(dev, attr, &temp); + if (err) + return err; + + return sprintf(buf, "%d\n", temp); +} + +static ssize_t mlxsw_hwmon_module_temp_fault_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mtbr_pl[MLXSW_REG_MTBR_LEN] = {0}; + u8 module, fault; + u16 temp; + int err; + + module = mlxsw_hwmon_attr->type_index - mlxsw_hwmon_dev->sensor_count; + mlxsw_reg_mtbr_pack(mtbr_pl, mlxsw_hwmon_dev->slot_index, + MLXSW_REG_MTBR_BASE_MODULE_INDEX + module, 1); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtbr), mtbr_pl); + if (err) { + dev_err(dev, "Failed to query module temperature sensor\n"); + return err; + } + + mlxsw_reg_mtbr_temp_unpack(mtbr_pl, 0, &temp, NULL); + + /* Update status and temperature cache. */ + switch (temp) { + case MLXSW_REG_MTBR_BAD_SENS_INFO: + /* Untrusted cable is connected. Reading temperature from its + * sensor is faulty. + */ + fault = 1; + break; + case MLXSW_REG_MTBR_NO_CONN: + case MLXSW_REG_MTBR_NO_TEMP_SENS: + case MLXSW_REG_MTBR_INDEX_NA: + default: + fault = 0; + break; + } + + return sprintf(buf, "%u\n", fault); +} + +static int mlxsw_hwmon_module_temp_critical_get(struct device *dev, + struct device_attribute *attr, + int *p_temp) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + u8 module; + int err; + + module = mlxsw_hwmon_attr->type_index - mlxsw_hwmon_dev->sensor_count; + err = mlxsw_env_module_temp_thresholds_get(mlxsw_hwmon->core, + mlxsw_hwmon_dev->slot_index, + module, SFP_TEMP_HIGH_WARN, + p_temp); + if (err) { + dev_err(dev, "Failed to query module temperature thresholds\n"); + return err; + } + + return 0; +} + +static ssize_t +mlxsw_hwmon_module_temp_critical_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int err, temp; + + err = mlxsw_hwmon_module_temp_critical_get(dev, attr, &temp); + if (err) + return err; + + return sprintf(buf, "%u\n", temp); +} + +static int mlxsw_hwmon_module_temp_emergency_get(struct device *dev, + struct device_attribute *attr, + int *p_temp) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + u8 module; + int err; + + module = mlxsw_hwmon_attr->type_index - mlxsw_hwmon_dev->sensor_count; + err = mlxsw_env_module_temp_thresholds_get(mlxsw_hwmon->core, + mlxsw_hwmon_dev->slot_index, + module, SFP_TEMP_HIGH_ALARM, + p_temp); + if (err) { + dev_err(dev, "Failed to query module temperature thresholds\n"); + return err; + } + + return 0; +} + +static ssize_t +mlxsw_hwmon_module_temp_emergency_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int err, temp; + + err = mlxsw_hwmon_module_temp_emergency_get(dev, attr, &temp); + if (err) + return err; + + return sprintf(buf, "%u\n", temp); +} + +static ssize_t +mlxsw_hwmon_module_temp_label_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + + return sprintf(buf, "front panel %03u\n", + mlxsw_hwmon_attr->type_index + 1 - + mlxsw_hwmon_attr->mlxsw_hwmon_dev->sensor_count); +} + +static ssize_t +mlxsw_hwmon_gbox_temp_label_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon_dev *mlxsw_hwmon_dev = mlxsw_hwmon_attr->mlxsw_hwmon_dev; + int index = mlxsw_hwmon_attr->type_index - + mlxsw_hwmon_dev->module_sensor_max + 1; + + return sprintf(buf, "gearbox %03u\n", index); +} + +static ssize_t mlxsw_hwmon_temp_critical_alarm_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int err, temp, emergency_temp, critic_temp; + + err = mlxsw_hwmon_module_temp_get(dev, attr, &temp); + if (err) + return err; + + if (temp <= 0) + return sprintf(buf, "%d\n", false); + + err = mlxsw_hwmon_module_temp_emergency_get(dev, attr, &emergency_temp); + if (err) + return err; + + if (temp >= emergency_temp) + return sprintf(buf, "%d\n", false); + + err = mlxsw_hwmon_module_temp_critical_get(dev, attr, &critic_temp); + if (err) + return err; + + return sprintf(buf, "%d\n", temp >= critic_temp); +} + +static ssize_t mlxsw_hwmon_temp_emergency_alarm_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int err, temp, emergency_temp; + + err = mlxsw_hwmon_module_temp_get(dev, attr, &temp); + if (err) + return err; + + if (temp <= 0) + return sprintf(buf, "%d\n", false); + + err = mlxsw_hwmon_module_temp_emergency_get(dev, attr, &emergency_temp); + if (err) + return err; + + return sprintf(buf, "%d\n", temp >= emergency_temp); +} + +enum mlxsw_hwmon_attr_type { + MLXSW_HWMON_ATTR_TYPE_TEMP, + MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, + MLXSW_HWMON_ATTR_TYPE_TEMP_RST, + MLXSW_HWMON_ATTR_TYPE_FAN_RPM, + MLXSW_HWMON_ATTR_TYPE_FAN_FAULT, + MLXSW_HWMON_ATTR_TYPE_PWM, + MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE, + MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_FAULT, + MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_CRIT, + MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_EMERG, + MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_LABEL, + MLXSW_HWMON_ATTR_TYPE_TEMP_GBOX_LABEL, + MLXSW_HWMON_ATTR_TYPE_TEMP_CRIT_ALARM, + MLXSW_HWMON_ATTR_TYPE_TEMP_EMERGENCY_ALARM, +}; + +static void mlxsw_hwmon_attr_add(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev, + enum mlxsw_hwmon_attr_type attr_type, + unsigned int type_index, unsigned int num) +{ + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr; + unsigned int attr_index; + + attr_index = mlxsw_hwmon_dev->attrs_count; + mlxsw_hwmon_attr = &mlxsw_hwmon_dev->hwmon_attrs[attr_index]; + + switch (attr_type) { + case MLXSW_HWMON_ATTR_TYPE_TEMP: + mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_temp_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_input", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_MAX: + mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_temp_max_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_highest", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_RST: + mlxsw_hwmon_attr->dev_attr.store = mlxsw_hwmon_temp_rst_store; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0200; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_reset_history", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_FAN_RPM: + mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_fan_rpm_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "fan%u_input", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_FAN_FAULT: + mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_fan_fault_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "fan%u_fault", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_PWM: + mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_pwm_show; + mlxsw_hwmon_attr->dev_attr.store = mlxsw_hwmon_pwm_store; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0644; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "pwm%u", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE: + mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_module_temp_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_input", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_FAULT: + mlxsw_hwmon_attr->dev_attr.show = + mlxsw_hwmon_module_temp_fault_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_fault", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_CRIT: + mlxsw_hwmon_attr->dev_attr.show = + mlxsw_hwmon_module_temp_critical_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_crit", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_EMERG: + mlxsw_hwmon_attr->dev_attr.show = + mlxsw_hwmon_module_temp_emergency_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_emergency", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_LABEL: + mlxsw_hwmon_attr->dev_attr.show = + mlxsw_hwmon_module_temp_label_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_label", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_GBOX_LABEL: + mlxsw_hwmon_attr->dev_attr.show = + mlxsw_hwmon_gbox_temp_label_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_label", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_CRIT_ALARM: + mlxsw_hwmon_attr->dev_attr.show = + mlxsw_hwmon_temp_critical_alarm_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_crit_alarm", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_EMERGENCY_ALARM: + mlxsw_hwmon_attr->dev_attr.show = + mlxsw_hwmon_temp_emergency_alarm_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = 0444; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_emergency_alarm", num + 1); + break; + default: + WARN_ON(1); + } + + mlxsw_hwmon_attr->type_index = type_index; + mlxsw_hwmon_attr->mlxsw_hwmon_dev = mlxsw_hwmon_dev; + mlxsw_hwmon_attr->dev_attr.attr.name = mlxsw_hwmon_attr->name; + sysfs_attr_init(&mlxsw_hwmon_attr->dev_attr.attr); + + mlxsw_hwmon_dev->attrs[attr_index] = &mlxsw_hwmon_attr->dev_attr.attr; + mlxsw_hwmon_dev->attrs_count++; +} + +static int mlxsw_hwmon_temp_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev) +{ + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mtcap_pl[MLXSW_REG_MTCAP_LEN] = {0}; + int i; + int err; + + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtcap), mtcap_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to get number of temp sensors\n"); + return err; + } + mlxsw_hwmon_dev->sensor_count = mlxsw_reg_mtcap_sensor_count_get(mtcap_pl); + for (i = 0; i < mlxsw_hwmon_dev->sensor_count; i++) { + char mtmp_pl[MLXSW_REG_MTMP_LEN] = {0}; + + mlxsw_reg_mtmp_slot_index_set(mtmp_pl, + mlxsw_hwmon_dev->slot_index); + mlxsw_reg_mtmp_sensor_index_set(mtmp_pl, i); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), + mtmp_pl); + if (err) + return err; + mlxsw_reg_mtmp_mte_set(mtmp_pl, true); + mlxsw_reg_mtmp_mtr_set(mtmp_pl, true); + err = mlxsw_reg_write(mlxsw_hwmon->core, + MLXSW_REG(mtmp), mtmp_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to setup temp sensor number %d\n", + i); + return err; + } + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP, i, i); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, i, i); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_RST, i, i); + } + return 0; +} + +static int mlxsw_hwmon_fans_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev) +{ + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mfcr_pl[MLXSW_REG_MFCR_LEN] = {0}; + enum mlxsw_reg_mfcr_pwm_frequency freq; + unsigned int type_index; + unsigned int num; + u16 tacho_active; + u8 pwm_active; + int err; + + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mfcr), mfcr_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to get to probe PWMs and Tachometers\n"); + return err; + } + mlxsw_reg_mfcr_unpack(mfcr_pl, &freq, &tacho_active, &pwm_active); + num = 0; + for (type_index = 0; type_index < MLXSW_MFCR_TACHOS_MAX; type_index++) { + if (tacho_active & BIT(type_index)) { + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_FAN_RPM, + type_index, num); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_FAN_FAULT, + type_index, num++); + } + } + num = 0; + for (type_index = 0; type_index < MLXSW_MFCR_PWMS_MAX; type_index++) { + if (pwm_active & BIT(type_index)) + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_PWM, + type_index, num++); + } + return 0; +} + +static int mlxsw_hwmon_module_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev) +{ + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + char mgpir_pl[MLXSW_REG_MGPIR_LEN]; + u8 module_sensor_max; + int i, err; + + mlxsw_reg_mgpir_pack(mgpir_pl, mlxsw_hwmon_dev->slot_index); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mgpir), mgpir_pl); + if (err) + return err; + + mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL, + &module_sensor_max, NULL); + + /* Add extra attributes for module temperature. Sensor index is + * assigned to sensor_count value, while all indexed before + * sensor_count are already utilized by the sensors connected through + * mtmp register by mlxsw_hwmon_temp_init(). + */ + mlxsw_hwmon_dev->module_sensor_max = mlxsw_hwmon_dev->sensor_count + + module_sensor_max; + for (i = mlxsw_hwmon_dev->sensor_count; + i < mlxsw_hwmon_dev->module_sensor_max; i++) { + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE, i, i); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_FAULT, + i, i); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_CRIT, i, + i); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_EMERG, + i, i); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_MODULE_LABEL, + i, i); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_CRIT_ALARM, + i, i); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_EMERGENCY_ALARM, + i, i); + } + + return 0; +} + +static int mlxsw_hwmon_gearbox_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev) +{ + struct mlxsw_hwmon *mlxsw_hwmon = mlxsw_hwmon_dev->hwmon; + enum mlxsw_reg_mgpir_device_type device_type; + int index, max_index, sensor_index; + char mgpir_pl[MLXSW_REG_MGPIR_LEN]; + char mtmp_pl[MLXSW_REG_MTMP_LEN]; + u8 gbox_num; + int err; + + mlxsw_reg_mgpir_pack(mgpir_pl, mlxsw_hwmon_dev->slot_index); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mgpir), mgpir_pl); + if (err) + return err; + + mlxsw_reg_mgpir_unpack(mgpir_pl, &gbox_num, &device_type, NULL, NULL, + NULL); + if (device_type != MLXSW_REG_MGPIR_DEVICE_TYPE_GEARBOX_DIE || + !gbox_num) + return 0; + + index = mlxsw_hwmon_dev->module_sensor_max; + max_index = mlxsw_hwmon_dev->module_sensor_max + gbox_num; + while (index < max_index) { + sensor_index = index % mlxsw_hwmon_dev->module_sensor_max + + MLXSW_REG_MTMP_GBOX_INDEX_MIN; + mlxsw_reg_mtmp_pack(mtmp_pl, mlxsw_hwmon_dev->slot_index, + sensor_index, true, true); + err = mlxsw_reg_write(mlxsw_hwmon->core, + MLXSW_REG(mtmp), mtmp_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to setup temp sensor number %d\n", + sensor_index); + return err; + } + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP, index, index); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, index, + index); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_RST, index, + index); + mlxsw_hwmon_attr_add(mlxsw_hwmon_dev, + MLXSW_HWMON_ATTR_TYPE_TEMP_GBOX_LABEL, + index, index); + index++; + } + + return 0; +} + +static void +mlxsw_hwmon_got_active(struct mlxsw_core *mlxsw_core, u8 slot_index, + void *priv) +{ + struct mlxsw_hwmon *hwmon = priv; + struct mlxsw_hwmon_dev *linecard; + struct device *dev; + int err; + + dev = hwmon->bus_info->dev; + linecard = &hwmon->line_cards[slot_index]; + if (linecard->active) + return; + /* For the main board, module sensor indexes start from 1, sensor index + * 0 is used for the ASIC. Use the same numbering for line cards. + */ + linecard->sensor_count = 1; + linecard->slot_index = slot_index; + linecard->hwmon = hwmon; + err = mlxsw_hwmon_module_init(linecard); + if (err) { + dev_err(dev, "Failed to configure hwmon objects for line card modules in slot %d\n", + slot_index); + return; + } + + err = mlxsw_hwmon_gearbox_init(linecard); + if (err) { + dev_err(dev, "Failed to configure hwmon objects for line card gearboxes in slot %d\n", + slot_index); + return; + } + + linecard->groups[0] = &linecard->group; + linecard->group.attrs = linecard->attrs; + sprintf(linecard->name, "%s#%02u", "linecard", slot_index); + linecard->hwmon_dev = + hwmon_device_register_with_groups(dev, linecard->name, + linecard, linecard->groups); + if (IS_ERR(linecard->hwmon_dev)) { + dev_err(dev, "Failed to register hwmon objects for line card in slot %d\n", + slot_index); + return; + } + + linecard->active = true; +} + +static void +mlxsw_hwmon_got_inactive(struct mlxsw_core *mlxsw_core, u8 slot_index, + void *priv) +{ + struct mlxsw_hwmon *hwmon = priv; + struct mlxsw_hwmon_dev *linecard; + + linecard = &hwmon->line_cards[slot_index]; + if (!linecard->active) + return; + linecard->active = false; + hwmon_device_unregister(linecard->hwmon_dev); + /* Reset attributes counter */ + linecard->attrs_count = 0; +} + +static struct mlxsw_linecards_event_ops mlxsw_hwmon_event_ops = { + .got_active = mlxsw_hwmon_got_active, + .got_inactive = mlxsw_hwmon_got_inactive, +}; + +int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core, + const struct mlxsw_bus_info *mlxsw_bus_info, + struct mlxsw_hwmon **p_hwmon) +{ + char mgpir_pl[MLXSW_REG_MGPIR_LEN]; + struct mlxsw_hwmon *mlxsw_hwmon; + struct device *hwmon_dev; + u8 num_of_slots; + int err; + + mlxsw_reg_mgpir_pack(mgpir_pl, 0); + err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mgpir), mgpir_pl); + if (err) + return err; + + mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL, NULL, + &num_of_slots); + + mlxsw_hwmon = kzalloc(struct_size(mlxsw_hwmon, line_cards, + num_of_slots + 1), GFP_KERNEL); + if (!mlxsw_hwmon) + return -ENOMEM; + + mlxsw_hwmon->core = mlxsw_core; + mlxsw_hwmon->bus_info = mlxsw_bus_info; + mlxsw_hwmon->line_cards[0].hwmon = mlxsw_hwmon; + mlxsw_hwmon->line_cards[0].slot_index = 0; + + err = mlxsw_hwmon_temp_init(&mlxsw_hwmon->line_cards[0]); + if (err) + goto err_temp_init; + + err = mlxsw_hwmon_fans_init(&mlxsw_hwmon->line_cards[0]); + if (err) + goto err_fans_init; + + err = mlxsw_hwmon_module_init(&mlxsw_hwmon->line_cards[0]); + if (err) + goto err_temp_module_init; + + err = mlxsw_hwmon_gearbox_init(&mlxsw_hwmon->line_cards[0]); + if (err) + goto err_temp_gearbox_init; + + mlxsw_hwmon->line_cards[0].groups[0] = &mlxsw_hwmon->line_cards[0].group; + mlxsw_hwmon->line_cards[0].group.attrs = mlxsw_hwmon->line_cards[0].attrs; + + hwmon_dev = hwmon_device_register_with_groups(mlxsw_bus_info->dev, + "mlxsw", + &mlxsw_hwmon->line_cards[0], + mlxsw_hwmon->line_cards[0].groups); + if (IS_ERR(hwmon_dev)) { + err = PTR_ERR(hwmon_dev); + goto err_hwmon_register; + } + + err = mlxsw_linecards_event_ops_register(mlxsw_hwmon->core, + &mlxsw_hwmon_event_ops, + mlxsw_hwmon); + if (err) + goto err_linecards_event_ops_register; + + mlxsw_hwmon->line_cards[0].hwmon_dev = hwmon_dev; + mlxsw_hwmon->line_cards[0].active = true; + *p_hwmon = mlxsw_hwmon; + return 0; + +err_linecards_event_ops_register: + hwmon_device_unregister(mlxsw_hwmon->line_cards[0].hwmon_dev); +err_hwmon_register: +err_temp_gearbox_init: +err_temp_module_init: +err_fans_init: +err_temp_init: + kfree(mlxsw_hwmon); + return err; +} + +void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon) +{ + mlxsw_hwmon->line_cards[0].active = false; + mlxsw_linecards_event_ops_unregister(mlxsw_hwmon->core, + &mlxsw_hwmon_event_ops, mlxsw_hwmon); + hwmon_device_unregister(mlxsw_hwmon->line_cards[0].hwmon_dev); + kfree(mlxsw_hwmon); +} |