From: "Edward A. James" <eajames@xxxxxxxxxx> Add functions to parse the data structures that are specific to the OCC on the POWER9 processor. These are the sensor data structures, including temperature, frequency, power, and "caps." Signed-off-by: Edward A. James <eajames@xxxxxxxxxx> Signed-off-by: Andrew Jeffery <andrew@xxxxxxxx> --- Documentation/hwmon/occ | 3 + drivers/hwmon/occ/occ_p9.c | 309 +++++++++++++++++++++++++++++++++++++++++++++ drivers/hwmon/occ/occ_p9.h | 30 +++++ 3 files changed, 342 insertions(+) create mode 100644 drivers/hwmon/occ/occ_p9.c create mode 100644 drivers/hwmon/occ/occ_p9.h diff --git a/Documentation/hwmon/occ b/Documentation/hwmon/occ index 143951e..6cea853 100644 --- a/Documentation/hwmon/occ +++ b/Documentation/hwmon/occ @@ -34,6 +34,9 @@ number of data structures, such as command format, response headers, and the like, are also defined in this specification, and are common to both POWER8 and POWER9 OCCs. +There is currently no public P9 OCC specification, and the data structures +defined in the POWER9 OCC driver are subject to change. + sysfs Entries ------------- diff --git a/drivers/hwmon/occ/occ_p9.c b/drivers/hwmon/occ/occ_p9.c new file mode 100644 index 0000000..3ef0284 --- /dev/null +++ b/drivers/hwmon/occ/occ_p9.c @@ -0,0 +1,309 @@ +/* + * occ_p9.c - OCC hwmon driver + * + * This file contains the Power9-specific methods and data structures for + * the OCC hwmon driver. + * + * Copyright 2016 IBM Corp. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <asm/unaligned.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/hwmon.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include "occ.h" +#include "occ_p9.h" + +/* P9 OCC sensor data format */ +struct p9_temp_sensor { + u32 sensor_id; + u8 fru_type; + u8 value; +}; + +struct p9_freq_sensor { + u32 sensor_id; + u16 value; +}; + +struct p9_power_sensor { + u32 sensor_id; + u8 function_id; + u8 apss_channel; + u16 reserved; + u32 update_tag; + u64 accumulator; + u16 value; +}; + +struct p9_caps_sensor { + u16 curr_powercap; + u16 curr_powerreading; + u16 norm_powercap; + u16 max_powercap; + u16 min_powercap; + u16 user_powerlimit; + u8 user_powerlimit_source; +}; + +static const u32 p9_sensor_hwmon_configs[MAX_OCC_SENSOR_TYPE] = { + HWMON_I_INPUT | HWMON_I_LABEL, /* freq: value | label */ + /* temp: value | label | fru_type */ + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_TYPE, + /* power: value | label | accum[0] | accum[1] | update_tag | + * (function_id | (apss_channel << 8)) + */ + HWMON_P_INPUT | HWMON_P_LABEL | HWMON_P_AVERAGE_MIN | + HWMON_P_AVERAGE_MAX | HWMON_P_AVERAGE_INTERVAL | + HWMON_P_RESET_HISTORY, + /* caps: curr | max | min | norm | user | source */ + HWMON_P_CAP | HWMON_P_CAP_MAX | HWMON_P_CAP_MIN | HWMON_P_MAX | + HWMON_P_ALARM | HWMON_P_CAP_ALARM, +}; + +void p9_parse_sensor(u8 *data, void *sensor, int sensor_type, int off, + int snum) +{ + switch (sensor_type) { + case FREQ: + { + struct p9_freq_sensor *fs = + &(((struct p9_freq_sensor *)sensor)[snum]); + + fs->sensor_id = be32_to_cpu(get_unaligned((u32 *)&data[off])); + fs->value = be16_to_cpu(get_unaligned((u16 *)&data[off + 4])); + } + break; + case TEMP: + { + struct p9_temp_sensor *ts = + &(((struct p9_temp_sensor *)sensor)[snum]); + + ts->sensor_id = be32_to_cpu(get_unaligned((u32 *)&data[off])); + fs->fru_type = data[off + 4]; + fs->value = data[off + 5]; + } + break; + case POWER: + { + struct p9_power_sensor *ps = + &(((struct p9_power_sensor *)sensor)[snum]); + + ps->sensor_id = be32_to_cpu(get_unaligned((u32 *)&data[off])); + ps->function_id = data[off + 4]; + ps->apss_channel = data[off + 5]; + ps->update_tag = + be32_to_cpu(get_unaligned((u32 *)&data[off + 8])); + ps->accumulator = + be64_to_cpu(get_unaligned((u64 *)&data[off + 12])); + ps->value = be16_to_cpu(get_unaligned((u16 *)&data[off + 20])); + } + break; + case CAPS: + { + struct p9_caps_sensor *cs = + &(((struct p9_caps_sensor *)sensor)[snum]); + + cs->curr_powercap = + be16_to_cpu(get_unaligned((u16 *)&data[off])); + cs->curr_powerreading = + be16_to_cpu(get_unaligned((u16 *)&data[off + 2])); + cs->norm_powercap = + be16_to_cpu(get_unaligned((u16 *)&data[off + 4])); + cs->max_powercap = + be16_to_cpu(get_unaligned((u16 *)&data[off + 6])); + cs->min_powercap = + be16_to_cpu(get_unaligned((u16 *)&data[off + 8])); + cs->user_powerlimit = + be16_to_cpu(get_unaligned((u16 *)&data[off + 10])); + cs->user_powerlimit_source = data[off + 12]; + } + break; + }; +} + +void *p9_alloc_sensor(struct device *dev, int sensor_type, int num_sensors) +{ + switch (sensor_type) { + case FREQ: + return devm_kzalloc(dev, num_sensors * + sizeof(struct p9_freq_sensor), GFP_KERNEL); + case TEMP: + return devm_kzalloc(dev, num_sensors * + sizeof(struct p9_temp_sensor), GFP_KERNEL); + case POWER: + return devm_kzalloc(dev, num_sensors * + sizeof(struct p9_power_sensor), + GFP_KERNEL); + case CAPS: + return devm_kzalloc(dev, num_sensors * + sizeof(struct p9_caps_sensor), GFP_KERNEL); + default: + return NULL; + } +} + +int p9_get_sensor(struct occ *driver, int sensor_type, int sensor_num, + u32 hwmon, long *val) +{ + int rc = 0; + void *sensor; + + if (sensor_type == POWER) { + if (hwmon == hwmon_power_cap || hwmon == hwmon_power_cap_max || + hwmon == hwmon_power_cap_min || hwmon == hwmon_power_max || + hwmon == hwmon_power_alarm || + hwmon == hwmon_power_cap_alarm) + sensor_type = CAPS; + } + + sensor = occ_get_sensor(driver, sensor_type); + if (!sensor) + return -ENODEV; + + switch (sensor_type) { + case FREQ: + { + struct p9_freq_sensor *fs = + &(((struct p9_freq_sensor *)sensor)[sensor_num]); + + switch (hwmon) { + case hwmon_in_input: + *val = fs->value; + break; + case hwmon_in_label: + *val = fs->sensor_id; + break; + default: + rc = -EOPNOTSUPP; + } + } + break; + case TEMP: + { + struct p9_temp_sensor *ts = + &(((struct p9_temp_sensor *)sensor)[sensor_num]); + + switch (hwmon) { + case hwmon_temp_input: + *val = ts->value; + break; + case hwmon_temp_type: + *val = ts->fru_type; + break; + case hwmon_temp_label: + *val = ts->sensor_id; + break; + default: + rc = -EOPNOTSUPP; + } + } + break; + case POWER: + { + struct p9_power_sensor *ps = + &(((struct p9_power_sensor *)sensor)[sensor_num]); + + switch (hwmon) { + case hwmon_power_input: + *val = ps->value; + break; + case hwmon_power_label: + *val = ps->sensor_id; + break; + case hwmon_power_average_min: + *val = ((u32 *)(&ps->accumulator))[0]; + break; + case hwmon_power_average_max: + *val = ((u32 *)(&ps->accumulator))[1]; + break; + case hwmon_power_average_interval: + *val = ps->update_tag; + break; + case hwmon_power_reset_history: + *val = ps->function_id | (ps->apss_channel << 8); + break; + default: + rc = -EOPNOTSUPP; + } + } + break; + case CAPS: + { + struct p9_caps_sensor *cs = + &(((struct p9_caps_sensor *)sensor)[sensor_num]); + + switch (hwmon) { + case hwmon_power_cap: + *val = cs->curr_powercap; + break; + case hwmon_power_cap_max: + *val = cs->max_powercap; + break; + case hwmon_power_cap_min: + *val = cs->min_powercap; + break; + case hwmon_power_max: + *val = cs->norm_powercap; + break; + case hwmon_power_alarm: + *val = cs->user_powerlimit; + break; + case hwmon_power_cap_alarm: + *val = cs->user_powerlimit_source; + break; + default: + rc = -EOPNOTSUPP; + } + } + break; + default: + rc = -EINVAL; + } + + return rc; +} + +static const struct occ_ops p9_ops = { + .parse_sensor = p9_parse_sensor, + .alloc_sensor = p9_alloc_sensor, + .get_sensor = p9_get_sensor, +}; + +static const struct occ_config p9_config = { + .command_addr = 0xFFFBE000, + .response_addr = 0xFFFBF000, +}; + +const u32 *p9_get_sensor_hwmon_configs() +{ + return p9_sensor_hwmon_configs; +} +EXPORT_SYMBOL(p9_get_sensor_hwmon_configs); + +struct occ *p9_occ_start(struct device *dev, void *bus, + struct occ_bus_ops *bus_ops) +{ + return occ_start(dev, bus, bus_ops, &p9_ops, &p9_config); +} +EXPORT_SYMBOL(p9_occ_start); + +MODULE_AUTHOR("Eddie James <eajames@xxxxxxxxxx>"); +MODULE_DESCRIPTION("P9 OCC sensors"); +MODULE_LICENSE("GPL"); diff --git a/drivers/hwmon/occ/occ_p9.h b/drivers/hwmon/occ/occ_p9.h new file mode 100644 index 0000000..18ca16a --- /dev/null +++ b/drivers/hwmon/occ/occ_p9.h @@ -0,0 +1,30 @@ +/* + * occ_p9.h - OCC hwmon driver + * + * This file contains Power9-specific function prototypes + * + * Copyright 2016 IBM Corp. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __OCC_P9_H__ +#define __OCC_P9_H__ + +#include "scom.h" + +struct device; + +const u32 *p9_get_sensor_hwmon_configs(void); +struct occ *p9_occ_start(struct device *dev, void *bus, + struct occ_bus_ops *bus_ops); + +#endif /* __OCC_P9_H__ */ -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html