[PATCH v3 09/10] drivers/hwmon: Add PECI hwmon client drivers
Jae Hyun Yoo
jae.hyun.yoo at linux.intel.com
Wed Apr 11 04:32:11 AEST 2018
This commit adds PECI cputemp and dimmtemp hwmon drivers.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo at linux.intel.com>
Reviewed-by: Haiyue Wang <haiyue.wang at linux.intel.com>
Reviewed-by: James Feist <james.feist at linux.intel.com>
Reviewed-by: Vernon Mauery <vernon.mauery at linux.intel.com>
Cc: Alan Cox <alan at linux.intel.com>
Cc: Andrew Jeffery <andrew at aj.id.au>
Cc: Andrew Lunn <andrew at lunn.ch>
Cc: Andy Shevchenko <andriy.shevchenko at intel.com>
Cc: Arnd Bergmann <arnd at arndb.de>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Fengguang Wu <fengguang.wu at intel.com>
Cc: Greg KH <gregkh at linuxfoundation.org>
Cc: Guenter Roeck <linux at roeck-us.net>
Cc: Jason M Biils <jason.m.bills at linux.intel.com>
Cc: Jean Delvare <jdelvare at suse.com>
Cc: Joel Stanley <joel at jms.id.au>
Cc: Julia Cartwright <juliac at eso.teric.us>
Cc: Miguel Ojeda <miguel.ojeda.sandonis at gmail.com>
Cc: Milton Miller II <miltonm at us.ibm.com>
Cc: Pavel Machek <pavel at ucw.cz>
Cc: Randy Dunlap <rdunlap at infradead.org>
Cc: Stef van Os <stef.van.os at prodrive-technologies.com>
Cc: Sumeet R Pawnikar <sumeet.r.pawnikar at intel.com>
---
drivers/hwmon/Kconfig | 28 ++
drivers/hwmon/Makefile | 2 +
drivers/hwmon/peci-cputemp.c | 783 ++++++++++++++++++++++++++++++++++++++++++
drivers/hwmon/peci-dimmtemp.c | 432 +++++++++++++++++++++++
4 files changed, 1245 insertions(+)
create mode 100644 drivers/hwmon/peci-cputemp.c
create mode 100644 drivers/hwmon/peci-dimmtemp.c
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index f249a4428458..c52f610f81d0 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1259,6 +1259,34 @@ config SENSORS_NCT7904
This driver can also be built as a module. If so, the module
will be called nct7904.
+config SENSORS_PECI_CPUTEMP
+ tristate "PECI CPU temperature monitoring support"
+ depends on OF
+ depends on PECI
+ help
+ If you say yes here you get support for the generic Intel PECI
+ cputemp driver which provides Digital Thermal Sensor (DTS) thermal
+ readings of the CPU package and CPU cores that are accessible using
+ the PECI Client Command Suite via the processor PECI client.
+ Check Documentation/hwmon/peci-cputemp for details.
+
+ This driver can also be built as a module. If so, the module
+ will be called peci-cputemp.
+
+config SENSORS_PECI_DIMMTEMP
+ tristate "PECI DIMM temperature monitoring support"
+ depends on OF
+ depends on PECI
+ help
+ If you say yes here you get support for the generic Intel PECI hwmon
+ driver which provides Digital Thermal Sensor (DTS) thermal readings of
+ DIMM components that are accessible using the PECI Client Command
+ Suite via the processor PECI client.
+ Check Documentation/hwmon/peci-dimmtemp for details.
+
+ This driver can also be built as a module. If so, the module
+ will be called peci-dimmtemp.
+
config SENSORS_NSA320
tristate "ZyXEL NSA320 and compatible fan speed and temperature sensors"
depends on GPIOLIB && OF
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index e7d52a36e6c4..48d9598fcd3a 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -136,6 +136,8 @@ obj-$(CONFIG_SENSORS_NCT7802) += nct7802.o
obj-$(CONFIG_SENSORS_NCT7904) += nct7904.o
obj-$(CONFIG_SENSORS_NSA320) += nsa320-hwmon.o
obj-$(CONFIG_SENSORS_NTC_THERMISTOR) += ntc_thermistor.o
+obj-$(CONFIG_SENSORS_PECI_CPUTEMP) += peci-cputemp.o
+obj-$(CONFIG_SENSORS_PECI_DIMMTEMP) += peci-dimmtemp.o
obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
obj-$(CONFIG_SENSORS_PC87427) += pc87427.o
obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o
diff --git a/drivers/hwmon/peci-cputemp.c b/drivers/hwmon/peci-cputemp.c
new file mode 100644
index 000000000000..f0bc92687512
--- /dev/null
+++ b/drivers/hwmon/peci-cputemp.c
@@ -0,0 +1,783 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2018 Intel Corporation
+
+#include <linux/delay.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/peci.h>
+
+#define TEMP_TYPE_PECI 6 /* Sensor type 6: Intel PECI */
+
+#define CORE_MAX_ON_HSX 18 /* Max number of cores on Haswell */
+#define CORE_MAX_ON_BDX 24 /* Max number of cores on Broadwell */
+#define CORE_MAX_ON_SKX 28 /* Max number of cores on Skylake */
+
+#define DEFAULT_CHANNEL_NUMS 5
+#define CORETEMP_CHANNEL_NUMS CORE_MAX_ON_SKX
+#define CPUTEMP_CHANNEL_NUMS (DEFAULT_CHANNEL_NUMS + CORETEMP_CHANNEL_NUMS)
+
+#define CLIENT_CPU_ID_MASK 0xf0ff0 /* Mask for Family / Model info */
+
+#define UPDATE_INTERVAL_MIN HZ
+
+enum cpu_gens {
+ CPU_GEN_HSX, /* Haswell Xeon */
+ CPU_GEN_BRX, /* Broadwell Xeon */
+ CPU_GEN_SKX, /* Skylake Xeon */
+ CPU_GEN_MAX
+};
+
+struct cpu_gen_info {
+ u32 type;
+ u32 cpu_id;
+ u32 core_max;
+};
+
+struct temp_data {
+ bool valid;
+ s32 value;
+ unsigned long last_updated;
+};
+
+struct temp_group {
+ struct temp_data die;
+ struct temp_data dts_margin;
+ struct temp_data tcontrol;
+ struct temp_data tthrottle;
+ struct temp_data tjmax;
+ struct temp_data core[CORETEMP_CHANNEL_NUMS];
+};
+
+struct peci_cputemp {
+ struct peci_client *client;
+ struct device *dev;
+ char name[PECI_NAME_SIZE];
+ struct temp_group temp;
+ u8 addr;
+ uint cpu_no;
+ const struct cpu_gen_info *gen_info;
+ u32 core_mask;
+ u32 temp_config[CPUTEMP_CHANNEL_NUMS + 1];
+ uint config_idx;
+ struct hwmon_channel_info temp_info;
+ const struct hwmon_channel_info *info[2];
+ struct hwmon_chip_info chip;
+};
+
+enum cputemp_channels {
+ channel_die,
+ channel_dts_mrgn,
+ channel_tcontrol,
+ channel_tthrottle,
+ channel_tjmax,
+ channel_core,
+};
+
+static const struct cpu_gen_info cpu_gen_info_table[] = {
+ { .type = CPU_GEN_HSX,
+ .cpu_id = 0x306f0, /* Family code: 6, Model number: 63 (0x3f) */
+ .core_max = CORE_MAX_ON_HSX },
+ { .type = CPU_GEN_BRX,
+ .cpu_id = 0x406f0, /* Family code: 6, Model number: 79 (0x4f) */
+ .core_max = CORE_MAX_ON_BDX },
+ { .type = CPU_GEN_SKX,
+ .cpu_id = 0x50650, /* Family code: 6, Model number: 85 (0x55) */
+ .core_max = CORE_MAX_ON_SKX },
+};
+
+static const u32 config_table[DEFAULT_CHANNEL_NUMS + 1] = {
+ /* Die temperature */
+ HWMON_T_LABEL | HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
+ HWMON_T_CRIT_HYST,
+
+ /* DTS margin temperature */
+ HWMON_T_LABEL | HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_LCRIT,
+
+ /* Tcontrol temperature */
+ HWMON_T_LABEL | HWMON_T_INPUT | HWMON_T_CRIT,
+
+ /* Tthrottle temperature */
+ HWMON_T_LABEL | HWMON_T_INPUT,
+
+ /* Tjmax temperature */
+ HWMON_T_LABEL | HWMON_T_INPUT,
+
+ /* Core temperature - for all core channels */
+ HWMON_T_LABEL | HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
+ HWMON_T_CRIT_HYST,
+};
+
+static const char *cputemp_label[CPUTEMP_CHANNEL_NUMS] = {
+ "Die",
+ "DTS margin",
+ "Tcontrol",
+ "Tthrottle",
+ "Tjmax",
+ "Core 0", "Core 1", "Core 2", "Core 3",
+ "Core 4", "Core 5", "Core 6", "Core 7",
+ "Core 8", "Core 9", "Core 10", "Core 11",
+ "Core 12", "Core 13", "Core 14", "Core 15",
+ "Core 16", "Core 17", "Core 18", "Core 19",
+ "Core 20", "Core 21", "Core 22", "Core 23",
+};
+
+static int send_peci_cmd(struct peci_cputemp *priv,
+ enum peci_cmd cmd,
+ void *msg)
+{
+ return peci_command(priv->client->adapter, cmd, msg);
+}
+
+static int need_update(struct temp_data *temp)
+{
+ if (temp->valid &&
+ time_before(jiffies, temp->last_updated + UPDATE_INTERVAL_MIN))
+ return 0;
+
+ return 1;
+}
+
+static void mark_updated(struct temp_data *temp)
+{
+ temp->valid = true;
+ temp->last_updated = jiffies;
+}
+
+static s32 ten_dot_six_to_millidegree(s32 val)
+{
+ return ((val ^ 0x8000) - 0x8000) * 1000 / 64;
+}
+
+static int get_tjmax(struct peci_cputemp *priv)
+{
+ struct peci_rd_pkg_cfg_msg msg;
+ int rc;
+
+ if (!priv->temp.tjmax.valid) {
+ msg.addr = priv->addr;
+ msg.index = MBX_INDEX_TEMP_TARGET;
+ msg.param = 0;
+ msg.rx_len = 4;
+
+ rc = send_peci_cmd(priv, PECI_CMD_RD_PKG_CFG, &msg);
+ if (rc)
+ return rc;
+
+ priv->temp.tjmax.value = (s32)msg.pkg_config[2] * 1000;
+ priv->temp.tjmax.valid = true;
+ }
+
+ return 0;
+}
+
+static int get_tcontrol(struct peci_cputemp *priv)
+{
+ struct peci_rd_pkg_cfg_msg msg;
+ s32 tcontrol_margin;
+ s32 tthrottle_offset;
+ int rc;
+
+ if (!need_update(&priv->temp.tcontrol))
+ return 0;
+
+ rc = get_tjmax(priv);
+ if (rc)
+ return rc;
+
+ msg.addr = priv->addr;
+ msg.index = MBX_INDEX_TEMP_TARGET;
+ msg.param = 0;
+ msg.rx_len = 4;
+
+ rc = send_peci_cmd(priv, PECI_CMD_RD_PKG_CFG, &msg);
+ if (rc)
+ return rc;
+
+ tcontrol_margin = msg.pkg_config[1];
+ tcontrol_margin = ((tcontrol_margin ^ 0x80) - 0x80) * 1000;
+ priv->temp.tcontrol.value = priv->temp.tjmax.value - tcontrol_margin;
+
+ tthrottle_offset = (msg.pkg_config[3] & 0x2f) * 1000;
+ priv->temp.tthrottle.value = priv->temp.tjmax.value - tthrottle_offset;
+
+ mark_updated(&priv->temp.tcontrol);
+ mark_updated(&priv->temp.tthrottle);
+
+ return 0;
+}
+
+static int get_tthrottle(struct peci_cputemp *priv)
+{
+ struct peci_rd_pkg_cfg_msg msg;
+ s32 tcontrol_margin;
+ s32 tthrottle_offset;
+ int rc;
+
+ if (!need_update(&priv->temp.tthrottle))
+ return 0;
+
+ rc = get_tjmax(priv);
+ if (rc)
+ return rc;
+
+ msg.addr = priv->addr;
+ msg.index = MBX_INDEX_TEMP_TARGET;
+ msg.param = 0;
+ msg.rx_len = 4;
+
+ rc = send_peci_cmd(priv, PECI_CMD_RD_PKG_CFG, &msg);
+ if (rc)
+ return rc;
+
+ tthrottle_offset = (msg.pkg_config[3] & 0x2f) * 1000;
+ priv->temp.tthrottle.value = priv->temp.tjmax.value - tthrottle_offset;
+
+ tcontrol_margin = msg.pkg_config[1];
+ tcontrol_margin = ((tcontrol_margin ^ 0x80) - 0x80) * 1000;
+ priv->temp.tcontrol.value = priv->temp.tjmax.value - tcontrol_margin;
+
+ mark_updated(&priv->temp.tthrottle);
+ mark_updated(&priv->temp.tcontrol);
+
+ return 0;
+}
+
+static int get_die_temp(struct peci_cputemp *priv)
+{
+ struct peci_get_temp_msg msg;
+ int rc;
+
+ if (!need_update(&priv->temp.die))
+ return 0;
+
+ rc = get_tjmax(priv);
+ if (rc)
+ return rc;
+
+ msg.addr = priv->addr;
+
+ rc = send_peci_cmd(priv, PECI_CMD_GET_TEMP, &msg);
+ if (rc)
+ return rc;
+
+ priv->temp.die.value = priv->temp.tjmax.value +
+ ((s32)msg.temp_raw * 1000 / 64);
+
+ mark_updated(&priv->temp.die);
+
+ return 0;
+}
+
+static int get_dts_margin(struct peci_cputemp *priv)
+{
+ struct peci_rd_pkg_cfg_msg msg;
+ s32 dts_margin;
+ int rc;
+
+ if (!need_update(&priv->temp.dts_margin))
+ return 0;
+
+ msg.addr = priv->addr;
+ msg.index = MBX_INDEX_DTS_MARGIN;
+ msg.param = 0;
+ msg.rx_len = 4;
+
+ rc = send_peci_cmd(priv, PECI_CMD_RD_PKG_CFG, &msg);
+ if (rc)
+ return rc;
+
+ dts_margin = (msg.pkg_config[1] << 8) | msg.pkg_config[0];
+
+ /**
+ * Processors return a value of DTS reading in 10.6 format
+ * (10 bits signed decimal, 6 bits fractional).
+ * Error codes:
+ * 0x8000: General sensor error
+ * 0x8001: Reserved
+ * 0x8002: Underflow on reading value
+ * 0x8003-0x81ff: Reserved
+ */
+ if (dts_margin >= 0x8000 && dts_margin <= 0x81ff)
+ return -EIO;
+
+ dts_margin = ten_dot_six_to_millidegree(dts_margin);
+
+ priv->temp.dts_margin.value = dts_margin;
+
+ mark_updated(&priv->temp.dts_margin);
+
+ return 0;
+}
+
+static int get_core_temp(struct peci_cputemp *priv, int core_index)
+{
+ struct peci_rd_pkg_cfg_msg msg;
+ s32 core_dts_margin;
+ int rc;
+
+ if (!need_update(&priv->temp.core[core_index]))
+ return 0;
+
+ rc = get_tjmax(priv);
+ if (rc)
+ return rc;
+
+ msg.addr = priv->addr;
+ msg.index = MBX_INDEX_PER_CORE_DTS_TEMP;
+ msg.param = core_index;
+ msg.rx_len = 4;
+
+ rc = send_peci_cmd(priv, PECI_CMD_RD_PKG_CFG, &msg);
+ if (rc)
+ return rc;
+
+ core_dts_margin = (msg.pkg_config[1] << 8) | msg.pkg_config[0];
+
+ /**
+ * Processors return a value of the core DTS reading in 10.6 format
+ * (10 bits signed decimal, 6 bits fractional).
+ * Error codes:
+ * 0x8000: General sensor error
+ * 0x8001: Reserved
+ * 0x8002: Underflow on reading value
+ * 0x8003-0x81ff: Reserved
+ */
+ if (core_dts_margin >= 0x8000 && core_dts_margin <= 0x81ff)
+ return -EIO;
+
+ core_dts_margin = ten_dot_six_to_millidegree(core_dts_margin);
+
+ priv->temp.core[core_index].value = priv->temp.tjmax.value +
+ core_dts_margin;
+
+ mark_updated(&priv->temp.core[core_index]);
+
+ return 0;
+}
+
+static int find_core_index(struct peci_cputemp *priv, int channel)
+{
+ int core_channel = channel - DEFAULT_CHANNEL_NUMS;
+ int idx, found = 0;
+
+ for (idx = 0; idx < priv->gen_info->core_max; idx++) {
+ if (priv->core_mask & BIT(idx)) {
+ if (core_channel == found)
+ break;
+
+ found++;
+ }
+ }
+
+ return idx;
+}
+
+static int cputemp_read_string(struct device *dev,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel, const char **str)
+{
+ struct peci_cputemp *priv = dev_get_drvdata(dev);
+ int core_index;
+
+ switch (attr) {
+ case hwmon_temp_label:
+ if (channel < DEFAULT_CHANNEL_NUMS) {
+ *str = cputemp_label[channel];
+ } else {
+ core_index = find_core_index(priv, channel);
+ *str = cputemp_label[DEFAULT_CHANNEL_NUMS + core_index];
+ }
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int cputemp_read_die(struct device *dev,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct peci_cputemp *priv = dev_get_drvdata(dev);
+ int rc;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ rc = get_die_temp(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.die.value;
+ return 0;
+ case hwmon_temp_max:
+ rc = get_tcontrol(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tcontrol.value;
+ return 0;
+ case hwmon_temp_crit:
+ rc = get_tjmax(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tjmax.value;
+ return 0;
+ case hwmon_temp_crit_hyst:
+ rc = get_tcontrol(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tjmax.value - priv->temp.tcontrol.value;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int cputemp_read_dts_margin(struct device *dev,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct peci_cputemp *priv = dev_get_drvdata(dev);
+ int rc;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ rc = get_dts_margin(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.dts_margin.value;
+ return 0;
+ case hwmon_temp_min:
+ *val = 0;
+ return 0;
+ case hwmon_temp_lcrit:
+ rc = get_tcontrol(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tcontrol.value - priv->temp.tjmax.value;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int cputemp_read_tcontrol(struct device *dev,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct peci_cputemp *priv = dev_get_drvdata(dev);
+ int rc;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ rc = get_tcontrol(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tcontrol.value;
+ return 0;
+ case hwmon_temp_crit:
+ rc = get_tjmax(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tjmax.value;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int cputemp_read_tthrottle(struct device *dev,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct peci_cputemp *priv = dev_get_drvdata(dev);
+ int rc;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ rc = get_tthrottle(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tthrottle.value;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int cputemp_read_tjmax(struct device *dev,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct peci_cputemp *priv = dev_get_drvdata(dev);
+ int rc;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ rc = get_tjmax(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tjmax.value;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int cputemp_read_core(struct device *dev,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct peci_cputemp *priv = dev_get_drvdata(dev);
+ int core_index = find_core_index(priv, channel);
+ int rc;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ rc = get_core_temp(priv, core_index);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.core[core_index].value;
+ return 0;
+ case hwmon_temp_max:
+ rc = get_tcontrol(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tcontrol.value;
+ return 0;
+ case hwmon_temp_crit:
+ rc = get_tjmax(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tjmax.value;
+ return 0;
+ case hwmon_temp_crit_hyst:
+ rc = get_tcontrol(priv);
+ if (rc)
+ return rc;
+
+ *val = priv->temp.tjmax.value - priv->temp.tcontrol.value;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int cputemp_read(struct device *dev,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ switch (channel) {
+ case channel_die:
+ return cputemp_read_die(dev, type, attr, channel, val);
+ case channel_dts_mrgn:
+ return cputemp_read_dts_margin(dev, type, attr, channel, val);
+ case channel_tcontrol:
+ return cputemp_read_tcontrol(dev, type, attr, channel, val);
+ case channel_tthrottle:
+ return cputemp_read_tthrottle(dev, type, attr, channel, val);
+ case channel_tjmax:
+ return cputemp_read_tjmax(dev, type, attr, channel, val);
+ default:
+ if (channel < CPUTEMP_CHANNEL_NUMS)
+ return cputemp_read_core(dev, type, attr, channel, val);
+
+ return -EOPNOTSUPP;
+ }
+}
+
+static umode_t cputemp_is_visible(const void *data,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ const struct peci_cputemp *priv = data;
+
+ if (priv->temp_config[channel] & BIT(attr))
+ return 0444;
+
+ return 0;
+}
+
+static const struct hwmon_ops cputemp_ops = {
+ .is_visible = cputemp_is_visible,
+ .read_string = cputemp_read_string,
+ .read = cputemp_read,
+};
+
+static int check_resolved_cores(struct peci_cputemp *priv)
+{
+ struct peci_rd_pci_cfg_local_msg msg;
+ int rc;
+
+ if (!(priv->client->adapter->cmd_mask & BIT(PECI_CMD_RD_PCI_CFG_LOCAL)))
+ return -EINVAL;
+
+ /* Get the RESOLVED_CORES register value */
+ msg.addr = priv->addr;
+ msg.bus = 1;
+ msg.device = 30;
+ msg.function = 3;
+ msg.reg = 0xB4;
+ msg.rx_len = 4;
+
+ rc = send_peci_cmd(priv, PECI_CMD_RD_PCI_CFG_LOCAL, &msg);
+ if (rc)
+ return rc;
+
+ priv->core_mask = msg.pci_config[3] << 24 |
+ msg.pci_config[2] << 16 |
+ msg.pci_config[1] << 8 |
+ msg.pci_config[0];
+
+ if (!priv->core_mask)
+ return -EAGAIN;
+
+ dev_dbg(priv->dev, "Scanned resolved cores: 0x%x\n", priv->core_mask);
+ return 0;
+}
+
+static int create_core_temp_info(struct peci_cputemp *priv)
+{
+ int rc, i;
+
+ rc = check_resolved_cores(priv);
+ if (!rc) {
+ for (i = 0; i < priv->gen_info->core_max; i++) {
+ if (priv->core_mask & BIT(i)) {
+ priv->temp_config[priv->config_idx++] =
+ config_table[channel_core];
+ }
+ }
+ }
+
+ return rc;
+}
+
+static int check_cpu_id(struct peci_cputemp *priv)
+{
+ struct peci_rd_pkg_cfg_msg msg;
+ u32 cpu_id;
+ int i, rc;
+
+ msg.addr = priv->addr;
+ msg.index = MBX_INDEX_CPU_ID;
+ msg.param = PKG_ID_CPU_ID;
+ msg.rx_len = 4;
+
+ rc = send_peci_cmd(priv, PECI_CMD_RD_PKG_CFG, &msg);
+ if (rc)
+ return rc;
+
+ cpu_id = ((msg.pkg_config[2] << 16) | (msg.pkg_config[1] << 8) |
+ msg.pkg_config[0]) & CLIENT_CPU_ID_MASK;
+
+ for (i = 0; i < CPU_GEN_MAX; i++) {
+ if (cpu_id == cpu_gen_info_table[i].cpu_id) {
+ priv->gen_info = &cpu_gen_info_table[i];
+ break;
+ }
+ }
+
+ if (!priv->gen_info)
+ return -ENODEV;
+
+ dev_dbg(priv->dev, "CPU_ID: 0x%x\n", cpu_id);
+ return 0;
+}
+
+static int peci_cputemp_probe(struct peci_client *client)
+{
+ struct device *dev = &client->dev;
+ struct peci_cputemp *priv;
+ struct device *hwmon_dev;
+ int rc;
+
+ if ((client->adapter->cmd_mask &
+ (BIT(PECI_CMD_GET_TEMP) | BIT(PECI_CMD_RD_PKG_CFG))) !=
+ (BIT(PECI_CMD_GET_TEMP) | BIT(PECI_CMD_RD_PKG_CFG))) {
+ dev_err(dev, "Client doesn't support temperature monitoring\n");
+ return -EINVAL;
+ }
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, priv);
+ priv->client = client;
+ priv->dev = dev;
+ priv->addr = client->addr;
+ priv->cpu_no = priv->addr - PECI_BASE_ADDR;
+
+ snprintf(priv->name, PECI_NAME_SIZE, "peci_cputemp.cpu%d",
+ priv->cpu_no);
+
+ rc = check_cpu_id(priv);
+ if (rc) {
+ dev_err(dev, "Client CPU is not supported\n");
+ return rc;
+ }
+
+ priv->temp_config[priv->config_idx++] = config_table[channel_die];
+ priv->temp_config[priv->config_idx++] = config_table[channel_dts_mrgn];
+ priv->temp_config[priv->config_idx++] = config_table[channel_tcontrol];
+ priv->temp_config[priv->config_idx++] = config_table[channel_tthrottle];
+ priv->temp_config[priv->config_idx++] = config_table[channel_tjmax];
+
+ rc = create_core_temp_info(priv);
+ if (rc)
+ dev_dbg(dev, "Failed to create core temp info\n");
+
+ priv->chip.ops = &cputemp_ops;
+ priv->chip.info = priv->info;
+
+ priv->info[0] = &priv->temp_info;
+
+ priv->temp_info.type = hwmon_temp;
+ priv->temp_info.config = priv->temp_config;
+
+ hwmon_dev = devm_hwmon_device_register_with_info(priv->dev,
+ priv->name,
+ priv,
+ &priv->chip,
+ NULL);
+
+ if (IS_ERR(hwmon_dev))
+ return PTR_ERR(hwmon_dev);
+
+ dev_dbg(dev, "%s: sensor '%s'\n", dev_name(hwmon_dev), priv->name);
+
+ return 0;
+}
+
+static const struct of_device_id peci_cputemp_of_table[] = {
+ { .compatible = "intel,peci-cputemp" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, peci_cputemp_of_table);
+
+static struct peci_driver peci_cputemp_driver = {
+ .probe = peci_cputemp_probe,
+ .driver = {
+ .name = "peci-cputemp",
+ .of_match_table = of_match_ptr(peci_cputemp_of_table),
+ },
+};
+module_peci_driver(peci_cputemp_driver);
+
+MODULE_AUTHOR("Jae Hyun Yoo <jae.hyun.yoo at linux.intel.com>");
+MODULE_DESCRIPTION("PECI cputemp driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/hwmon/peci-dimmtemp.c b/drivers/hwmon/peci-dimmtemp.c
new file mode 100644
index 000000000000..78bf29cb2c4c
--- /dev/null
+++ b/drivers/hwmon/peci-dimmtemp.c
@@ -0,0 +1,432 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2018 Intel Corporation
+
+#include <linux/delay.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/peci.h>
+#include <linux/workqueue.h>
+
+#define TEMP_TYPE_PECI 6 /* Sensor type 6: Intel PECI */
+
+#define CHAN_RANK_MAX_ON_HSX 8 /* Max number of channel ranks on Haswell */
+#define DIMM_IDX_MAX_ON_HSX 3 /* Max DIMM index per channel on Haswell */
+
+#define CHAN_RANK_MAX_ON_BDX 4 /* Max number of channel ranks on Broadwell */
+#define DIMM_IDX_MAX_ON_BDX 3 /* Max DIMM index per channel on Broadwell */
+
+#define CHAN_RANK_MAX_ON_SKX 6 /* Max number of channel ranks on Skylake */
+#define DIMM_IDX_MAX_ON_SKX 2 /* Max DIMM index per channel on Skylake */
+
+#define CHAN_RANK_MAX CHAN_RANK_MAX_ON_HSX
+#define DIMM_IDX_MAX DIMM_IDX_MAX_ON_HSX
+
+#define DIMM_NUMS_MAX (CHAN_RANK_MAX * DIMM_IDX_MAX)
+
+#define CLIENT_CPU_ID_MASK 0xf0ff0 /* Mask for Family / Model info */
+
+#define UPDATE_INTERVAL_MIN HZ
+
+#define DIMM_MASK_CHECK_DELAY_JIFFIES msecs_to_jiffies(5000)
+#define DIMM_MASK_CHECK_RETRY_MAX 60 /* 60 x 5 secs = 5 minutes */
+
+enum cpu_gens {
+ CPU_GEN_HSX, /* Haswell Xeon */
+ CPU_GEN_BRX, /* Broadwell Xeon */
+ CPU_GEN_SKX, /* Skylake Xeon */
+ CPU_GEN_MAX
+};
+
+struct cpu_gen_info {
+ u32 type;
+ u32 cpu_id;
+ u32 chan_rank_max;
+ u32 dimm_idx_max;
+};
+
+struct temp_data {
+ bool valid;
+ s32 value;
+ unsigned long last_updated;
+};
+
+struct peci_dimmtemp {
+ struct peci_client *client;
+ struct device *dev;
+ struct workqueue_struct *work_queue;
+ struct delayed_work work_handler;
+ char name[PECI_NAME_SIZE];
+ struct temp_data temp[DIMM_NUMS_MAX];
+ u8 addr;
+ uint cpu_no;
+ const struct cpu_gen_info *gen_info;
+ u32 dimm_mask;
+ int retry_count;
+ int channels;
+ u32 temp_config[DIMM_NUMS_MAX + 1];
+ struct hwmon_channel_info temp_info;
+ const struct hwmon_channel_info *info[2];
+ struct hwmon_chip_info chip;
+};
+
+static const struct cpu_gen_info cpu_gen_info_table[] = {
+ { .type = CPU_GEN_HSX,
+ .cpu_id = 0x306f0, /* Family code: 6, Model number: 63 (0x3f) */
+ .chan_rank_max = CHAN_RANK_MAX_ON_HSX,
+ .dimm_idx_max = DIMM_IDX_MAX_ON_HSX },
+ { .type = CPU_GEN_BRX,
+ .cpu_id = 0x406f0, /* Family code: 6, Model number: 79 (0x4f) */
+ .chan_rank_max = CHAN_RANK_MAX_ON_BDX,
+ .dimm_idx_max = DIMM_IDX_MAX_ON_BDX },
+ { .type = CPU_GEN_SKX,
+ .cpu_id = 0x50650, /* Family code: 6, Model number: 85 (0x55) */
+ .chan_rank_max = CHAN_RANK_MAX_ON_SKX,
+ .dimm_idx_max = DIMM_IDX_MAX_ON_SKX },
+};
+
+static const char *dimmtemp_label[CHAN_RANK_MAX][DIMM_IDX_MAX] = {
+ { "DIMM A0", "DIMM A1", "DIMM A2" },
+ { "DIMM B0", "DIMM B1", "DIMM B2" },
+ { "DIMM C0", "DIMM C1", "DIMM C2" },
+ { "DIMM D0", "DIMM D1", "DIMM D2" },
+ { "DIMM E0", "DIMM E1", "DIMM E2" },
+ { "DIMM F0", "DIMM F1", "DIMM F2" },
+ { "DIMM G0", "DIMM G1", "DIMM G2" },
+ { "DIMM H0", "DIMM H1", "DIMM H2" },
+};
+
+static int send_peci_cmd(struct peci_dimmtemp *priv, enum peci_cmd cmd,
+ void *msg)
+{
+ return peci_command(priv->client->adapter, cmd, msg);
+}
+
+static int need_update(struct temp_data *temp)
+{
+ if (temp->valid &&
+ time_before(jiffies, temp->last_updated + UPDATE_INTERVAL_MIN))
+ return 0;
+
+ return 1;
+}
+
+static void mark_updated(struct temp_data *temp)
+{
+ temp->valid = true;
+ temp->last_updated = jiffies;
+}
+
+static int get_dimm_temp(struct peci_dimmtemp *priv, int dimm_no)
+{
+ int dimm_order = dimm_no % priv->gen_info->dimm_idx_max;
+ int chan_rank = dimm_no / priv->gen_info->dimm_idx_max;
+ struct peci_rd_pkg_cfg_msg msg;
+ int rc;
+
+ if (!need_update(&priv->temp[dimm_no]))
+ return 0;
+
+ msg.addr = priv->addr;
+ msg.index = MBX_INDEX_DDR_DIMM_TEMP;
+ msg.param = chan_rank;
+ msg.rx_len = 4;
+
+ rc = send_peci_cmd(priv, PECI_CMD_RD_PKG_CFG, &msg);
+ if (rc)
+ return rc;
+
+ priv->temp[dimm_no].value = msg.pkg_config[dimm_order] * 1000;
+
+ mark_updated(&priv->temp[dimm_no]);
+
+ return 0;
+}
+
+static int find_dimm_number(struct peci_dimmtemp *priv, int channel)
+{
+ int dimm_nums_max = priv->gen_info->chan_rank_max *
+ priv->gen_info->dimm_idx_max;
+ int idx, found = 0;
+
+ for (idx = 0; idx < dimm_nums_max; idx++) {
+ if (priv->dimm_mask & BIT(idx)) {
+ if (channel == found)
+ break;
+
+ found++;
+ }
+ }
+
+ return idx;
+}
+
+static int dimmtemp_read_string(struct device *dev,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel, const char **str)
+{
+ struct peci_dimmtemp *priv = dev_get_drvdata(dev);
+ u32 dimm_idx_max = priv->gen_info->dimm_idx_max;
+ int dimm_no, chan_rank, dimm_idx;
+
+ switch (attr) {
+ case hwmon_temp_label:
+ dimm_no = find_dimm_number(priv, channel);
+ chan_rank = dimm_no / dimm_idx_max;
+ dimm_idx = dimm_no % dimm_idx_max;
+ *str = dimmtemp_label[chan_rank][dimm_idx];
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int dimmtemp_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct peci_dimmtemp *priv = dev_get_drvdata(dev);
+ int dimm_no = find_dimm_number(priv, channel);
+ int rc;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ rc = get_dimm_temp(priv, dimm_no);
+ if (rc)
+ return rc;
+
+ *val = priv->temp[dimm_no].value;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static umode_t dimmtemp_is_visible(const void *data,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ switch (attr) {
+ case hwmon_temp_label:
+ case hwmon_temp_input:
+ return 0444;
+ default:
+ return 0;
+ }
+}
+
+static const struct hwmon_ops dimmtemp_ops = {
+ .is_visible = dimmtemp_is_visible,
+ .read_string = dimmtemp_read_string,
+ .read = dimmtemp_read,
+};
+
+static int check_populated_dimms(struct peci_dimmtemp *priv)
+{
+ u32 chan_rank_max = priv->gen_info->chan_rank_max;
+ u32 dimm_idx_max = priv->gen_info->dimm_idx_max;
+ struct peci_rd_pkg_cfg_msg msg;
+ int chan_rank, dimm_idx;
+ int rc, channels = 0;
+
+ for (chan_rank = 0; chan_rank < chan_rank_max; chan_rank++) {
+ msg.addr = priv->addr;
+ msg.index = MBX_INDEX_DDR_DIMM_TEMP;
+ msg.param = chan_rank;
+ msg.rx_len = 4;
+
+ rc = send_peci_cmd(priv, PECI_CMD_RD_PKG_CFG, &msg);
+ if (rc) {
+ priv->dimm_mask = 0;
+ return rc;
+ }
+
+ for (dimm_idx = 0; dimm_idx < dimm_idx_max; dimm_idx++) {
+ if (msg.pkg_config[dimm_idx]) {
+ priv->dimm_mask |= BIT(chan_rank *
+ chan_rank_max +
+ dimm_idx);
+ channels++;
+ }
+ }
+ }
+
+ if (!priv->dimm_mask)
+ return -EAGAIN;
+
+ priv->channels = channels;
+
+ dev_dbg(priv->dev, "Scanned populated DIMMs: 0x%x\n", priv->dimm_mask);
+ return 0;
+}
+
+static int create_dimm_temp_info(struct peci_dimmtemp *priv)
+{
+ struct device *hwmon_dev;
+ int rc, i;
+
+ rc = check_populated_dimms(priv);
+ if (!rc) {
+ for (i = 0; i < priv->channels; i++)
+ priv->temp_config[i] = HWMON_T_LABEL | HWMON_T_INPUT;
+
+ priv->chip.ops = &dimmtemp_ops;
+ priv->chip.info = priv->info;
+
+ priv->info[0] = &priv->temp_info;
+
+ priv->temp_info.type = hwmon_temp;
+ priv->temp_info.config = priv->temp_config;
+
+ hwmon_dev = devm_hwmon_device_register_with_info(priv->dev,
+ priv->name,
+ priv,
+ &priv->chip,
+ NULL);
+ rc = PTR_ERR_OR_ZERO(hwmon_dev);
+ if (!rc)
+ dev_dbg(priv->dev, "%s: sensor '%s'\n",
+ dev_name(hwmon_dev), priv->name);
+ } else if (rc == -EAGAIN) {
+ if (priv->retry_count < DIMM_MASK_CHECK_RETRY_MAX) {
+ queue_delayed_work(priv->work_queue,
+ &priv->work_handler,
+ DIMM_MASK_CHECK_DELAY_JIFFIES);
+ priv->retry_count++;
+ dev_dbg(priv->dev,
+ "Deferred DIMM temp info creation\n");
+ } else {
+ rc = -ETIMEDOUT;
+ dev_err(priv->dev,
+ "Timeout retrying DIMM temp info creation\n");
+ }
+ }
+
+ return rc;
+}
+
+static void create_dimm_temp_info_delayed(struct work_struct *work)
+{
+ struct delayed_work *dwork = to_delayed_work(work);
+ struct peci_dimmtemp *priv = container_of(dwork, struct peci_dimmtemp,
+ work_handler);
+ int rc;
+
+ rc = create_dimm_temp_info(priv);
+ if (rc && rc != -EAGAIN)
+ dev_dbg(priv->dev, "Failed to create DIMM temp info\n");
+}
+
+static int check_cpu_id(struct peci_dimmtemp *priv)
+{
+ struct peci_rd_pkg_cfg_msg msg;
+ u32 cpu_id;
+ int i, rc;
+
+ msg.addr = priv->addr;
+ msg.index = MBX_INDEX_CPU_ID;
+ msg.param = PKG_ID_CPU_ID;
+ msg.rx_len = 4;
+
+ rc = send_peci_cmd(priv, PECI_CMD_RD_PKG_CFG, &msg);
+ if (rc)
+ return rc;
+
+ cpu_id = ((msg.pkg_config[2] << 16) | (msg.pkg_config[1] << 8) |
+ msg.pkg_config[0]) & CLIENT_CPU_ID_MASK;
+
+ for (i = 0; i < CPU_GEN_MAX; i++) {
+ if (cpu_id == cpu_gen_info_table[i].cpu_id) {
+ priv->gen_info = &cpu_gen_info_table[i];
+ break;
+ }
+ }
+
+ if (!priv->gen_info)
+ return -ENODEV;
+
+ dev_dbg(priv->dev, "CPU_ID: 0x%x\n", cpu_id);
+ return 0;
+}
+
+static int peci_dimmtemp_probe(struct peci_client *client)
+{
+ struct device *dev = &client->dev;
+ struct peci_dimmtemp *priv;
+ int rc;
+
+ if ((client->adapter->cmd_mask &
+ (BIT(PECI_CMD_GET_TEMP) | BIT(PECI_CMD_RD_PKG_CFG))) !=
+ (BIT(PECI_CMD_GET_TEMP) | BIT(PECI_CMD_RD_PKG_CFG))) {
+ dev_err(dev, "Client doesn't support temperature monitoring\n");
+ return -EINVAL;
+ }
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, priv);
+ priv->client = client;
+ priv->dev = dev;
+ priv->addr = client->addr;
+ priv->cpu_no = priv->addr - PECI_BASE_ADDR;
+
+ snprintf(priv->name, PECI_NAME_SIZE, "peci_dimmtemp.cpu%d",
+ priv->cpu_no);
+
+ rc = check_cpu_id(priv);
+ if (rc) {
+ dev_err(dev, "Client CPU is not supported\n");
+ return rc;
+ }
+
+ priv->work_queue = alloc_ordered_workqueue(priv->name, 0);
+ if (!priv->work_queue)
+ return -ENOMEM;
+
+ INIT_DELAYED_WORK(&priv->work_handler, create_dimm_temp_info_delayed);
+
+ rc = create_dimm_temp_info(priv);
+ if (rc && rc != -EAGAIN) {
+ dev_err(dev, "Failed to create DIMM temp info\n");
+ goto err_free_wq;
+ }
+
+ return 0;
+
+err_free_wq:
+ destroy_workqueue(priv->work_queue);
+ return rc;
+}
+
+static int peci_dimmtemp_remove(struct peci_client *client)
+{
+ struct peci_dimmtemp *priv = dev_get_drvdata(&client->dev);
+
+ cancel_delayed_work(&priv->work_handler);
+ destroy_workqueue(priv->work_queue);
+
+ return 0;
+}
+
+static const struct of_device_id peci_dimmtemp_of_table[] = {
+ { .compatible = "intel,peci-dimmtemp" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, peci_dimmtemp_of_table);
+
+static struct peci_driver peci_dimmtemp_driver = {
+ .probe = peci_dimmtemp_probe,
+ .remove = peci_dimmtemp_remove,
+ .driver = {
+ .name = "peci-dimmtemp",
+ .of_match_table = of_match_ptr(peci_dimmtemp_of_table),
+ },
+};
+module_peci_driver(peci_dimmtemp_driver);
+
+MODULE_AUTHOR("Jae Hyun Yoo <jae.hyun.yoo at linux.intel.com>");
+MODULE_DESCRIPTION("PECI dimmtemp driver");
+MODULE_LICENSE("GPL v2");
--
2.16.2
More information about the openbmc
mailing list