From: "Edward A. James" <eaja...@us.ibm.com>
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 <eaja...@us.ibm.com>
Signed-off-by: Andrew Jeffery <and...@aj.id.au>
---
Documentation/hwmon/occ | 3 +
drivers/hwmon/occ/Kconfig | 11 ++
drivers/hwmon/occ/Makefile | 2 +
drivers/hwmon/occ/occ_p9.c | 320 +++++++++++++++++++++++++++++++++++++++++++++
drivers/hwmon/occ/occ_p9.h | 25 ++++
5 files changed, 361 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 4ec8842..8fb3f41 100644
--- a/Documentation/hwmon/occ
+++ b/Documentation/hwmon/occ
@@ -36,6 +36,9 @@ 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/Kconfig b/drivers/hwmon/occ/Kconfig
index d521720..5b8ca27 100644
--- a/drivers/hwmon/occ/Kconfig
+++ b/drivers/hwmon/occ/Kconfig
@@ -25,4 +25,15 @@ config SENSORS_IBM_OCC_P8_I2C
This driver can also be built as a module. If so, the module will be
called hwmon_occ_p8.
+config SENSORS_IBM_OCC_P9
+ tristate "POWER9 OCC hwmon support"
+ depends on !SENSORS_IBM_OCC_P8_I2C
+ help
+ Provide a hwmon sysfs interface for the POWER9 On-Chip Controller,
+ exposing temperature, frequency, and power measurements. This
+ interface runs on the service processor, not the POWER CPU.
+
+ This driver can also be built as a module. If so, the module will be
+ called hwmon_occ_p9.
+
endif
diff --git a/drivers/hwmon/occ/Makefile b/drivers/hwmon/occ/Makefile
index 864b044..7b3a612 100644
--- a/drivers/hwmon/occ/Makefile
+++ b/drivers/hwmon/occ/Makefile
@@ -1,3 +1,5 @@
obj-$(CONFIG_SENSORS_IBM_OCC_P8_I2C) += hwmon_occ_p8.o
+obj-$(CONFIG_SENSORS_IBM_OCC_P9) += hwmon_occ_p9.o
hwmon_occ_p8-objs := occ.o occ_sysfs.o occ_scom_i2c.o occ_p8.o occ_p8_i2c.o
+hwmon_occ_p9-objs := occ.o occ_sysfs.o occ_p9.o
diff --git a/drivers/hwmon/occ/occ_p9.c b/drivers/hwmon/occ/occ_p9.c
new file mode 100644
index 0000000..646d764
--- /dev/null
+++ b/drivers/hwmon/occ/occ_p9.c
@@ -0,0 +1,320 @@
+/*
+ * occ_p9.c - OCC hwmon driver
+ *
+ * This file contains the Power9-specific methods and data structures for
+ * the OCC hwmon driver.
+ *
+ * Copyright 2017 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.
+ */
+
+#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;
+};
+
+/* value, sensor_id */
+#define FREQ_SENSOR_CONFIG (HWMON_I_INPUT | HWMON_I_LABEL)
+
+/* value, sensor_id, fru_type */
+#define TEMP_SENSOR_CONFIG (HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_TYPE)
+
+/* value, sensor_id, accumulator[0], accumulator[1], update_tag,
+ * (function_id | (appss_channel << 8)
+ */
+#define POWER_SENSOR_CONFIG \
+( \
+ HWMON_P_INPUT | HWMON_P_LABEL | HWMON_P_AVERAGE_MIN | \
+ HWMON_P_AVERAGE_MAX | HWMON_P_AVERAGE_INTERVAL | \
+ HWMON_P_RESET_HISTORY \
+)
+
+/* curr_powercap, max_powercap, min_powercap, norm_powercap, user_powerlimit
+ * user_powerlimit_source
+ */
+#define CAPS_SENSOR_CONFIG \
+( \
+ HWMON_P_CAP | HWMON_P_CAP_MAX | HWMON_P_CAP_MIN | HWMON_P_MAX | \
+ HWMON_P_ALARM | HWMON_P_CAP_ALARM \
+)
+
+static const u32 p9_sensor_hwmon_configs[MAX_OCC_SENSOR_TYPE] = {
+ FREQ_SENSOR_CONFIG,
+ TEMP_SENSOR_CONFIG,
+ POWER_SENSOR_CONFIG,
+ CAPS_SENSOR_CONFIG,
+};
+
+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]));
+ ts->fru_type = data[off + 4];
+ ts->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_init_data p9_init = {
+ .command_addr = 0xFFFBE000,
+ .response_addr = 0xFFFBF000,
+ .ops = &p9_ops,
+};
+
+const u32 *p9_get_sensor_hwmon_configs()
+{
+ return p9_sensor_hwmon_configs;
+}
+
+struct occ *p9_occ_init(struct device *dev, void *bus,
+ const struct occ_bus_ops *bus_ops)
+{
+ return occ_init(dev, bus, bus_ops, &p9_init);
+}
+
+MODULE_AUTHOR("Eddie James <eaja...@us.ibm.com>");
+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..0fd647a
--- /dev/null
+++ b/drivers/hwmon/occ/occ_p9.h
@@ -0,0 +1,25 @@
+/*
+ * occ_p9.h - OCC hwmon driver
+ *
+ * This file contains Power9-specific function prototypes
+ *
+ * Copyright 2017 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.
+ */
+
+#ifndef __OCC_P9_H__
+#define __OCC_P9_H__
+
+struct device;
+struct occ;
+struct occ_bus_ops;
+
+const u32 *p9_get_sensor_hwmon_configs(void);
+struct occ *p9_occ_init(struct device *dev, void *bus,
+ const struct occ_bus_ops *bus_ops);
+
+#endif /* __OCC_P9_H__ */
--
1.8.3.1
