From mboxrd@z Thu Jan 1 00:00:00 1970 From: eajames.ibm@gmail.com Subject: [PATCH linux 6/6] hwmon: occ: Add callbacks for parsing P9 OCC datastructures Date: Fri, 30 Dec 2016 11:56:08 -0600 Message-ID: <1483120568-21082-7-git-send-email-eajames.ibm@gmail.com> References: <1483120568-21082-1-git-send-email-eajames.ibm@gmail.com> Return-path: In-Reply-To: <1483120568-21082-1-git-send-email-eajames.ibm@gmail.com> Sender: linux-hwmon-owner@vger.kernel.org To: linux@roeck-us.net Cc: jdelvare@suse.com, corbet@lwn.net, mark.rutland@arm.com, robh+dt@kernel.org, wsa@the-dreams.de, andrew@aj.id.au, joel@jms.id.au, devicetree@vger.kernel.org, linux-doc@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, "Edward A. James" List-Id: devicetree@vger.kernel.org From: "Edward A. James" 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 Signed-off-by: Andrew Jeffery Reviewed-by: Andrew Jeffery --- Documentation/hwmon/occ | 3 + drivers/hwmon/occ/p9_occ.c | 243 +++++++++++++++++++++++++++++++++++++++++++++ drivers/hwmon/occ/p9_occ.h | 30 ++++++ 3 files changed, 276 insertions(+) create mode 100644 drivers/hwmon/occ/p9_occ.c create mode 100644 drivers/hwmon/occ/p9_occ.h diff --git a/Documentation/hwmon/occ b/Documentation/hwmon/occ index a6b3dd6..0f17c2f 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/p9_occ.c b/drivers/hwmon/occ/p9_occ.c new file mode 100644 index 0000000..f69b469 --- /dev/null +++ b/drivers/hwmon/occ/p9_occ.c @@ -0,0 +1,243 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +#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; +}; + +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(int sensor_type, int num_sensors) +{ + switch (sensor_type) { + case FREQ: + return kcalloc(num_sensors, sizeof(struct p9_freq_sensor), + GFP_KERNEL); + case TEMP: + return kcalloc(num_sensors, sizeof(struct p9_temp_sensor), + GFP_KERNEL); + case POWER: + return kcalloc(num_sensors, sizeof(struct p9_power_sensor), + GFP_KERNEL); + case CAPS: + return kcalloc(num_sensors, sizeof(struct p9_caps_sensor), + GFP_KERNEL); + default: + return NULL; + } +} + +int p9_get_sensor_value(struct occ *driver, int sensor_type, int snum) +{ + void *sensor; + + if (sensor_type == CAPS) + return -EINVAL; + + sensor = occ_get_sensor(driver, sensor_type); + if (!sensor) + return -ENODEV; + + switch (sensor_type) { + case FREQ: + return ((struct p9_freq_sensor *)sensor)[snum].value; + case TEMP: + return ((struct p9_temp_sensor *)sensor)[snum].value; + case POWER: + return ((struct p9_power_sensor *)sensor)[snum].value; + default: + return -EINVAL; + } +} + +int p9_get_sensor_id(struct occ *driver, int sensor_type, int snum) +{ + void *sensor; + + if (sensor_type == CAPS) + return -EINVAL; + + sensor = occ_get_sensor(driver, sensor_type); + if (!sensor) + return -ENODEV; + + switch (sensor_type) { + case FREQ: + return ((struct p9_freq_sensor *)sensor)[snum].sensor_id; + case TEMP: + return ((struct p9_temp_sensor *)sensor)[snum].sensor_id; + case POWER: + return ((struct p9_power_sensor *)sensor)[snum].sensor_id; + default: + return -EINVAL; + } +} + +int p9_get_caps_value(void *sensor, int snum, int caps_field) +{ + struct p9_caps_sensor *caps_sensor = sensor; + + switch (caps_field) { + case 0: + return caps_sensor[snum].curr_powercap; + case 1: + return caps_sensor[snum].curr_powerreading; + case 2: + return caps_sensor[snum].norm_powercap; + case 3: + return caps_sensor[snum].max_powercap; + case 4: + return caps_sensor[snum].min_powercap; + case 5: + return caps_sensor[snum].user_powerlimit; + case 6: + return caps_sensor[snum].user_powerlimit_source; + default: + return -EINVAL; + } +} +static const struct occ_ops p9_ops = { + .parse_sensor = p9_parse_sensor, + .alloc_sensor = p9_alloc_sensor, + .get_sensor_value = p9_get_sensor_value, + .get_sensor_id = p9_get_sensor_id, + .get_caps_value = p9_get_caps_value, +}; + +static const struct occ_config p9_config = { + .command_addr = 0xFFFBE000, + .response_addr = 0xFFFBF000, +}; + +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(occ_p9_start); + +int p9_occ_stop(struct occ *occ) +{ + return occ_stop(occ); +} +EXPORT_SYMBOL(occ_p9_stop); + +MODULE_AUTHOR("Eddie James "); +MODULE_DESCRIPTION("P9 OCC sensors"); +MODULE_LICENSE("GPL"); diff --git a/drivers/hwmon/occ/p9_occ.h b/drivers/hwmon/occ/p9_occ.h new file mode 100644 index 0000000..8130873 --- /dev/null +++ b/drivers/hwmon/occ/p9_occ.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; + +struct occ *p9_occ_start(struct device *dev, void *bus, + struct occ_bus_ops *bus_ops); +int p9_occ_stop(struct occ *occ); + +#endif /* __OCC_P9_H__ */ -- 1.9.1