diff options
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/core_thermal.c | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c index 821fef2e2230..0b85c7252f9e 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c +++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c @@ -9,8 +9,10 @@ #include <linux/sysfs.h> #include <linux/thermal.h> #include <linux/err.h> +#include <linux/sfp.h> #include "core.h" +#include "core_env.h" #define MLXSW_THERMAL_POLL_INT 1000 /* ms */ #define MLXSW_THERMAL_SLOW_POLL_INT 20000 /* ms */ @@ -19,6 +21,8 @@ #define MLXSW_THERMAL_ASIC_TEMP_HOT 105000 /* 105C */ #define MLXSW_THERMAL_ASIC_TEMP_CRIT 110000 /* 110C */ #define MLXSW_THERMAL_HYSTERESIS_TEMP 5000 /* 5C */ +#define MLXSW_THERMAL_MODULE_TEMP_SHIFT (MLXSW_THERMAL_HYSTERESIS_TEMP * 2) +#define MLXSW_THERMAL_ZONE_MAX_NAME 16 #define MLXSW_THERMAL_MAX_STATE 10 #define MLXSW_THERMAL_MAX_DUTY 255 /* Minimum and maximum fan allowed speed in percent: from 20% to 100%. Values @@ -36,6 +40,13 @@ static char * const mlxsw_thermal_external_allowed_cdev[] = { "mlxreg_fan", }; +enum mlxsw_thermal_trips { + MLXSW_THERMAL_TEMP_TRIP_NORM, + MLXSW_THERMAL_TEMP_TRIP_HIGH, + MLXSW_THERMAL_TEMP_TRIP_HOT, + MLXSW_THERMAL_TEMP_TRIP_CRIT, +}; + struct mlxsw_thermal_trip { int type; int temp; @@ -80,6 +91,16 @@ static const struct mlxsw_thermal_trip default_thermal_trips[] = { /* Make sure all trips are writable */ #define MLXSW_THERMAL_TRIP_MASK (BIT(MLXSW_THERMAL_NUM_TRIPS) - 1) +struct mlxsw_thermal; + +struct mlxsw_thermal_module { + struct mlxsw_thermal *parent; + struct thermal_zone_device *tzdev; + struct mlxsw_thermal_trip trips[MLXSW_THERMAL_NUM_TRIPS]; + enum thermal_device_mode mode; + int module; +}; + struct mlxsw_thermal { struct mlxsw_core *core; const struct mlxsw_bus_info *bus_info; @@ -89,6 +110,8 @@ struct mlxsw_thermal { u8 cooling_levels[MLXSW_THERMAL_MAX_STATE + 1]; struct mlxsw_thermal_trip trips[MLXSW_THERMAL_NUM_TRIPS]; enum thermal_device_mode mode; + struct mlxsw_thermal_module *tz_module_arr; + unsigned int tz_module_num; }; static inline u8 mlxsw_state_to_duty(int state) @@ -122,6 +145,57 @@ static int mlxsw_get_cooling_device_idx(struct mlxsw_thermal *thermal, return -ENODEV; } +static void +mlxsw_thermal_module_trips_reset(struct mlxsw_thermal_module *tz) +{ + tz->trips[MLXSW_THERMAL_TEMP_TRIP_NORM].temp = 0; + tz->trips[MLXSW_THERMAL_TEMP_TRIP_HIGH].temp = 0; + tz->trips[MLXSW_THERMAL_TEMP_TRIP_HOT].temp = 0; + tz->trips[MLXSW_THERMAL_TEMP_TRIP_CRIT].temp = 0; +} + +static int +mlxsw_thermal_module_trips_update(struct device *dev, struct mlxsw_core *core, + struct mlxsw_thermal_module *tz) +{ + int crit_temp, emerg_temp; + int err; + + err = mlxsw_env_module_temp_thresholds_get(core, tz->module, + SFP_TEMP_HIGH_WARN, + &crit_temp); + if (err) + return err; + + err = mlxsw_env_module_temp_thresholds_get(core, tz->module, + SFP_TEMP_HIGH_ALARM, + &emerg_temp); + if (err) + return err; + + /* According to the system thermal requirements, the thermal zones are + * defined with four trip points. The critical and emergency + * temperature thresholds, provided by QSFP module are set as "active" + * and "hot" trip points, "normal" and "critical" trip points are + * derived from "active" and "hot" by subtracting or adding double + * hysteresis value. + */ + if (crit_temp >= MLXSW_THERMAL_MODULE_TEMP_SHIFT) + tz->trips[MLXSW_THERMAL_TEMP_TRIP_NORM].temp = crit_temp - + MLXSW_THERMAL_MODULE_TEMP_SHIFT; + else + tz->trips[MLXSW_THERMAL_TEMP_TRIP_NORM].temp = crit_temp; + tz->trips[MLXSW_THERMAL_TEMP_TRIP_HIGH].temp = crit_temp; + tz->trips[MLXSW_THERMAL_TEMP_TRIP_HOT].temp = emerg_temp; + if (emerg_temp > crit_temp) + tz->trips[MLXSW_THERMAL_TEMP_TRIP_CRIT].temp = emerg_temp + + MLXSW_THERMAL_MODULE_TEMP_SHIFT; + else + tz->trips[MLXSW_THERMAL_TEMP_TRIP_CRIT].temp = emerg_temp; + + return 0; +} + static int mlxsw_thermal_bind(struct thermal_zone_device *tzdev, struct thermal_cooling_device *cdev) { @@ -291,6 +365,204 @@ static struct thermal_zone_device_ops mlxsw_thermal_ops = { .set_trip_hyst = mlxsw_thermal_set_trip_hyst, }; +static int mlxsw_thermal_module_bind(struct thermal_zone_device *tzdev, + struct thermal_cooling_device *cdev) +{ + struct mlxsw_thermal_module *tz = tzdev->devdata; + struct mlxsw_thermal *thermal = tz->parent; + int i, j, err; + + /* If the cooling device is one of ours bind it */ + if (mlxsw_get_cooling_device_idx(thermal, cdev) < 0) + return 0; + + for (i = 0; i < MLXSW_THERMAL_NUM_TRIPS; i++) { + const struct mlxsw_thermal_trip *trip = &tz->trips[i]; + + err = thermal_zone_bind_cooling_device(tzdev, i, cdev, + trip->max_state, + trip->min_state, + THERMAL_WEIGHT_DEFAULT); + if (err < 0) + goto err_bind_cooling_device; + } + return 0; + +err_bind_cooling_device: + for (j = i - 1; j >= 0; j--) + thermal_zone_unbind_cooling_device(tzdev, j, cdev); + return err; +} + +static int mlxsw_thermal_module_unbind(struct thermal_zone_device *tzdev, + struct thermal_cooling_device *cdev) +{ + struct mlxsw_thermal_module *tz = tzdev->devdata; + struct mlxsw_thermal *thermal = tz->parent; + int i; + int err; + + /* If the cooling device is one of ours unbind it */ + if (mlxsw_get_cooling_device_idx(thermal, cdev) < 0) + return 0; + + for (i = 0; i < MLXSW_THERMAL_NUM_TRIPS; i++) { + err = thermal_zone_unbind_cooling_device(tzdev, i, cdev); + WARN_ON(err); + } + return err; +} + +static int mlxsw_thermal_module_mode_get(struct thermal_zone_device *tzdev, + enum thermal_device_mode *mode) +{ + struct mlxsw_thermal_module *tz = tzdev->devdata; + + *mode = tz->mode; + + return 0; +} + +static int mlxsw_thermal_module_mode_set(struct thermal_zone_device *tzdev, + enum thermal_device_mode mode) +{ + struct mlxsw_thermal_module *tz = tzdev->devdata; + struct mlxsw_thermal *thermal = tz->parent; + + mutex_lock(&tzdev->lock); + + if (mode == THERMAL_DEVICE_ENABLED) + tzdev->polling_delay = thermal->polling_delay; + else + tzdev->polling_delay = 0; + + mutex_unlock(&tzdev->lock); + + tz->mode = mode; + thermal_zone_device_update(tzdev, THERMAL_EVENT_UNSPECIFIED); + + return 0; +} + +static int mlxsw_thermal_module_temp_get(struct thermal_zone_device *tzdev, + int *p_temp) +{ + struct mlxsw_thermal_module *tz = tzdev->devdata; + struct mlxsw_thermal *thermal = tz->parent; + struct device *dev = thermal->bus_info->dev; + char mtbr_pl[MLXSW_REG_MTBR_LEN]; + u16 temp; + int err; + + /* Read module temperature. */ + mlxsw_reg_mtbr_pack(mtbr_pl, MLXSW_REG_MTBR_BASE_MODULE_INDEX + + tz->module, 1); + err = mlxsw_reg_query(thermal->core, MLXSW_REG(mtbr), mtbr_pl); + if (err) + return err; + + mlxsw_reg_mtbr_temp_unpack(mtbr_pl, 0, &temp, NULL); + /* Update temperature. */ + switch (temp) { + case MLXSW_REG_MTBR_NO_CONN: /* fall-through */ + case MLXSW_REG_MTBR_NO_TEMP_SENS: /* fall-through */ + case MLXSW_REG_MTBR_INDEX_NA: /* fall-through */ + case MLXSW_REG_MTBR_BAD_SENS_INFO: + temp = 0; + break; + default: + temp = MLXSW_REG_MTMP_TEMP_TO_MC(temp); + /* Reset all trip point. */ + mlxsw_thermal_module_trips_reset(tz); + /* Update trip points. */ + err = mlxsw_thermal_module_trips_update(dev, thermal->core, + tz); + if (err) + return err; + break; + } + + *p_temp = (int) temp; + return 0; +} + +static int +mlxsw_thermal_module_trip_type_get(struct thermal_zone_device *tzdev, int trip, + enum thermal_trip_type *p_type) +{ + struct mlxsw_thermal_module *tz = tzdev->devdata; + + if (trip < 0 || trip >= MLXSW_THERMAL_NUM_TRIPS) + return -EINVAL; + + *p_type = tz->trips[trip].type; + return 0; +} + +static int +mlxsw_thermal_module_trip_temp_get(struct thermal_zone_device *tzdev, + int trip, int *p_temp) +{ + struct mlxsw_thermal_module *tz = tzdev->devdata; + + if (trip < 0 || trip >= MLXSW_THERMAL_NUM_TRIPS) + return -EINVAL; + + *p_temp = tz->trips[trip].temp; + return 0; +} + +static int +mlxsw_thermal_module_trip_temp_set(struct thermal_zone_device *tzdev, + int trip, int temp) +{ + struct mlxsw_thermal_module *tz = tzdev->devdata; + + if (trip < 0 || trip >= MLXSW_THERMAL_NUM_TRIPS || + temp > tz->trips[MLXSW_THERMAL_TEMP_TRIP_CRIT].temp) + return -EINVAL; + + tz->trips[trip].temp = temp; + return 0; +} + +static int +mlxsw_thermal_module_trip_hyst_get(struct thermal_zone_device *tzdev, int trip, + int *p_hyst) +{ + struct mlxsw_thermal_module *tz = tzdev->devdata; + + *p_hyst = tz->trips[trip].hyst; + return 0; +} + +static int +mlxsw_thermal_module_trip_hyst_set(struct thermal_zone_device *tzdev, int trip, + int hyst) +{ + struct mlxsw_thermal_module *tz = tzdev->devdata; + + tz->trips[trip].hyst = hyst; + return 0; +} + +static struct thermal_zone_params mlxsw_thermal_module_params = { + .governor_name = "user_space", +}; + +static struct thermal_zone_device_ops mlxsw_thermal_module_ops = { + .bind = mlxsw_thermal_module_bind, + .unbind = mlxsw_thermal_module_unbind, + .get_mode = mlxsw_thermal_module_mode_get, + .set_mode = mlxsw_thermal_module_mode_set, + .get_temp = mlxsw_thermal_module_temp_get, + .get_trip_type = mlxsw_thermal_module_trip_type_get, + .get_trip_temp = mlxsw_thermal_module_trip_temp_get, + .set_trip_temp = mlxsw_thermal_module_trip_temp_set, + .get_trip_hyst = mlxsw_thermal_module_trip_hyst_get, + .set_trip_hyst = mlxsw_thermal_module_trip_hyst_set, +}; + static int mlxsw_thermal_get_max_state(struct thermal_cooling_device *cdev, unsigned long *p_state) { @@ -391,6 +663,123 @@ static const struct thermal_cooling_device_ops mlxsw_cooling_ops = { .set_cur_state = mlxsw_thermal_set_cur_state, }; +static int +mlxsw_thermal_module_tz_init(struct mlxsw_thermal_module *module_tz) +{ + char tz_name[MLXSW_THERMAL_ZONE_MAX_NAME]; + int err; + + snprintf(tz_name, sizeof(tz_name), "mlxsw-module%d", + module_tz->module + 1); + module_tz->tzdev = thermal_zone_device_register(tz_name, + MLXSW_THERMAL_NUM_TRIPS, + MLXSW_THERMAL_TRIP_MASK, + module_tz, + &mlxsw_thermal_module_ops, + &mlxsw_thermal_module_params, + 0, 0); + if (IS_ERR(module_tz->tzdev)) { + err = PTR_ERR(module_tz->tzdev); + return err; + } + + return 0; +} + +static void mlxsw_thermal_module_tz_fini(struct thermal_zone_device *tzdev) +{ + thermal_zone_device_unregister(tzdev); +} + +static int +mlxsw_thermal_module_init(struct device *dev, struct mlxsw_core *core, + struct mlxsw_thermal *thermal, u8 local_port) +{ + struct mlxsw_thermal_module *module_tz; + char pmlp_pl[MLXSW_REG_PMLP_LEN]; + u8 width, module; + int err; + + mlxsw_reg_pmlp_pack(pmlp_pl, local_port); + err = mlxsw_reg_query(core, MLXSW_REG(pmlp), pmlp_pl); + if (err) + return err; + + width = mlxsw_reg_pmlp_width_get(pmlp_pl); + if (!width) + return 0; + + module = mlxsw_reg_pmlp_module_get(pmlp_pl, 0); + module_tz = &thermal->tz_module_arr[module]; + module_tz->module = module; + module_tz->parent = thermal; + memcpy(module_tz->trips, default_thermal_trips, + sizeof(thermal->trips)); + /* Initialize all trip point. */ + mlxsw_thermal_module_trips_reset(module_tz); + /* Update trip point according to the module data. */ + err = mlxsw_thermal_module_trips_update(dev, core, module_tz); + if (err) + return err; + + thermal->tz_module_num++; + + return 0; +} + +static void mlxsw_thermal_module_fini(struct mlxsw_thermal_module *module_tz) +{ + if (module_tz && module_tz->tzdev) { + mlxsw_thermal_module_tz_fini(module_tz->tzdev); + module_tz->tzdev = NULL; + } +} + +static int +mlxsw_thermal_modules_init(struct device *dev, struct mlxsw_core *core, + struct mlxsw_thermal *thermal) +{ + unsigned int module_count = mlxsw_core_max_ports(core); + int i, err; + + thermal->tz_module_arr = kcalloc(module_count, + sizeof(*thermal->tz_module_arr), + GFP_KERNEL); + if (!thermal->tz_module_arr) + return -ENOMEM; + + for (i = 1; i < module_count; i++) { + err = mlxsw_thermal_module_init(dev, core, thermal, i); + if (err) + goto err_unreg_tz_module_arr; + } + + for (i = 0; i < thermal->tz_module_num; i++) { + err = mlxsw_thermal_module_tz_init(&thermal->tz_module_arr[i]); + if (err) + goto err_unreg_tz_module_arr; + } + + return 0; + +err_unreg_tz_module_arr: + for (i = module_count - 1; i >= 0; i--) + mlxsw_thermal_module_fini(&thermal->tz_module_arr[i]); + kfree(thermal->tz_module_arr); + return err; +} + +static void +mlxsw_thermal_modules_fini(struct mlxsw_thermal *thermal) +{ + unsigned int module_count = mlxsw_core_max_ports(thermal->core); + int i; + + for (i = module_count - 1; i >= 0; i--) + mlxsw_thermal_module_fini(&thermal->tz_module_arr[i]); + kfree(thermal->tz_module_arr); +} + int mlxsw_thermal_init(struct mlxsw_core *core, const struct mlxsw_bus_info *bus_info, struct mlxsw_thermal **p_thermal) @@ -477,9 +866,19 @@ int mlxsw_thermal_init(struct mlxsw_core *core, goto err_unreg_cdevs; } + err = mlxsw_thermal_modules_init(dev, core, thermal); + if (err) + goto err_unreg_tzdev; + thermal->mode = THERMAL_DEVICE_ENABLED; *p_thermal = thermal; return 0; + +err_unreg_tzdev: + if (thermal->tzdev) { + thermal_zone_device_unregister(thermal->tzdev); + thermal->tzdev = NULL; + } err_unreg_cdevs: for (i = 0; i < MLXSW_MFCR_PWMS_MAX; i++) if (thermal->cdevs[i]) @@ -493,6 +892,7 @@ void mlxsw_thermal_fini(struct mlxsw_thermal *thermal) { int i; + mlxsw_thermal_modules_fini(thermal); if (thermal->tzdev) { thermal_zone_device_unregister(thermal->tzdev); thermal->tzdev = NULL; |