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Subject[PATCH v3 11/13] hwmon: peci: Add dimmtemp driver
Date
Add peci-dimmtemp driver for Temperature Sensor on DIMM readings that
are accessible via the processor PECI interface.

The main use case for the driver (and PECI interface) is out-of-band
management, where we're able to obtain thermal readings from an external
entity connected with PECI, e.g. BMC on server platforms.

Co-developed-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
drivers/hwmon/peci/Kconfig | 13 +
drivers/hwmon/peci/Makefile | 2 +
drivers/hwmon/peci/dimmtemp.c | 630 ++++++++++++++++++++++++++++++++++
3 files changed, 645 insertions(+)
create mode 100644 drivers/hwmon/peci/dimmtemp.c

diff --git a/drivers/hwmon/peci/Kconfig b/drivers/hwmon/peci/Kconfig
index e10eed68d70a..9d32a57badfe 100644
--- a/drivers/hwmon/peci/Kconfig
+++ b/drivers/hwmon/peci/Kconfig
@@ -14,5 +14,18 @@ config SENSORS_PECI_CPUTEMP
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 client"
+ depends on PECI
+ select SENSORS_PECI
+ select PECI_CPU
+ help
+ If you say yes here you get support for the generic Intel PECI hwmon
+ driver which provides Temperature Sensor on DIMM readings that are
+ accessible via the processor PECI interface.
+
+ This driver can also be built as a module. If so, the module
+ will be called peci-dimmtemp.
+
config SENSORS_PECI
tristate
diff --git a/drivers/hwmon/peci/Makefile b/drivers/hwmon/peci/Makefile
index e8a0ada5ab1f..191cfa0227f3 100644
--- a/drivers/hwmon/peci/Makefile
+++ b/drivers/hwmon/peci/Makefile
@@ -1,5 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only

peci-cputemp-y := cputemp.o
+peci-dimmtemp-y := dimmtemp.o

obj-$(CONFIG_SENSORS_PECI_CPUTEMP) += peci-cputemp.o
+obj-$(CONFIG_SENSORS_PECI_DIMMTEMP) += peci-dimmtemp.o
diff --git a/drivers/hwmon/peci/dimmtemp.c b/drivers/hwmon/peci/dimmtemp.c
new file mode 100644
index 000000000000..ec435b03e401
--- /dev/null
+++ b/drivers/hwmon/peci/dimmtemp.c
@@ -0,0 +1,630 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2018-2021 Intel Corporation
+
+#include <linux/auxiliary_bus.h>
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/hwmon.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/peci.h>
+#include <linux/peci-cpu.h>
+#include <linux/units.h>
+#include <linux/workqueue.h>
+
+#include "common.h"
+
+#define DIMM_MASK_CHECK_DELAY_JIFFIES msecs_to_jiffies(5000)
+
+/* Max number of channel ranks and DIMM index per channel */
+#define CHAN_RANK_MAX_ON_HSX 8
+#define DIMM_IDX_MAX_ON_HSX 3
+#define CHAN_RANK_MAX_ON_BDX 4
+#define DIMM_IDX_MAX_ON_BDX 3
+#define CHAN_RANK_MAX_ON_BDXD 2
+#define DIMM_IDX_MAX_ON_BDXD 2
+#define CHAN_RANK_MAX_ON_SKX 6
+#define DIMM_IDX_MAX_ON_SKX 2
+#define CHAN_RANK_MAX_ON_ICX 8
+#define DIMM_IDX_MAX_ON_ICX 2
+#define CHAN_RANK_MAX_ON_ICXD 4
+#define DIMM_IDX_MAX_ON_ICXD 2
+
+#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 CPU_SEG_MASK GENMASK(23, 16)
+#define GET_CPU_SEG(x) (((x) & CPU_SEG_MASK) >> 16)
+#define CPU_BUS_MASK GENMASK(7, 0)
+#define GET_CPU_BUS(x) ((x) & CPU_BUS_MASK)
+
+#define DIMM_TEMP_MAX GENMASK(15, 8)
+#define DIMM_TEMP_CRIT GENMASK(23, 16)
+#define GET_TEMP_MAX(x) (((x) & DIMM_TEMP_MAX) >> 8)
+#define GET_TEMP_CRIT(x) (((x) & DIMM_TEMP_CRIT) >> 16)
+
+#define NO_DIMM_RETRY_COUNT_MAX 5
+
+struct peci_dimmtemp;
+
+struct dimm_info {
+ int chan_rank_max;
+ int dimm_idx_max;
+ u8 min_peci_revision;
+ int (*read_thresholds)(struct peci_dimmtemp *priv, int dimm_order,
+ int chan_rank, u32 *data);
+};
+
+struct peci_dimm_thresholds {
+ long temp_max;
+ long temp_crit;
+ struct peci_sensor_state state;
+};
+
+enum peci_dimm_threshold_type {
+ temp_max_type,
+ temp_crit_type,
+};
+
+struct peci_dimmtemp {
+ struct peci_device *peci_dev;
+ struct device *dev;
+ const char *name;
+ const struct dimm_info *gen_info;
+ struct delayed_work detect_work;
+ struct {
+ struct peci_sensor_data temp;
+ struct peci_dimm_thresholds thresholds;
+ } dimm[DIMM_NUMS_MAX];
+ char **dimmtemp_label;
+ DECLARE_BITMAP(dimm_mask, DIMM_NUMS_MAX);
+ u8 no_dimm_retry_count;
+};
+
+static u8 __dimm_temp(u32 reg, int dimm_order)
+{
+ return (reg >> (dimm_order * 8)) & 0xff;
+}
+
+static int get_dimm_temp(struct peci_dimmtemp *priv, int dimm_no, long *val)
+{
+ int dimm_order = dimm_no % priv->gen_info->dimm_idx_max;
+ int chan_rank = dimm_no / priv->gen_info->dimm_idx_max;
+ int ret = 0;
+ u32 data;
+
+ mutex_lock(&priv->dimm[dimm_no].temp.state.lock);
+ if (!peci_sensor_need_update(&priv->dimm[dimm_no].temp.state))
+ goto skip_update;
+
+ ret = peci_pcs_read(priv->peci_dev, PECI_PCS_DDR_DIMM_TEMP, chan_rank, &data);
+ if (ret)
+ goto unlock;
+
+ priv->dimm[dimm_no].temp.value = __dimm_temp(data, dimm_order) * MILLIDEGREE_PER_DEGREE;
+
+ peci_sensor_mark_updated(&priv->dimm[dimm_no].temp.state);
+
+skip_update:
+ *val = priv->dimm[dimm_no].temp.value;
+unlock:
+ mutex_unlock(&priv->dimm[dimm_no].temp.state.lock);
+ return ret;
+}
+
+static int update_thresholds(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;
+ u32 data;
+ int ret;
+
+ if (!peci_sensor_need_update(&priv->dimm[dimm_no].thresholds.state))
+ return 0;
+
+ ret = priv->gen_info->read_thresholds(priv, dimm_order, chan_rank, &data);
+ if (ret == -ENODATA) /* Use default or previous value */
+ return 0;
+ if (ret)
+ return ret;
+
+ priv->dimm[dimm_no].thresholds.temp_max = GET_TEMP_MAX(data) * MILLIDEGREE_PER_DEGREE;
+ priv->dimm[dimm_no].thresholds.temp_crit = GET_TEMP_CRIT(data) * MILLIDEGREE_PER_DEGREE;
+
+ peci_sensor_mark_updated(&priv->dimm[dimm_no].thresholds.state);
+
+ return 0;
+}
+
+static int get_dimm_thresholds(struct peci_dimmtemp *priv, enum peci_dimm_threshold_type type,
+ int dimm_no, long *val)
+{
+ int ret;
+
+ mutex_lock(&priv->dimm[dimm_no].thresholds.state.lock);
+ ret = update_thresholds(priv, dimm_no);
+ if (ret)
+ goto unlock;
+
+ switch (type) {
+ case temp_max_type:
+ *val = priv->dimm[dimm_no].thresholds.temp_max;
+ break;
+ case temp_crit_type:
+ *val = priv->dimm[dimm_no].thresholds.temp_crit;
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+unlock:
+ mutex_unlock(&priv->dimm[dimm_no].thresholds.state.lock);
+
+ return ret;
+}
+
+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);
+
+ if (attr != hwmon_temp_label)
+ return -EOPNOTSUPP;
+
+ *str = (const char *)priv->dimmtemp_label[channel];
+
+ return 0;
+}
+
+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);
+
+ switch (attr) {
+ case hwmon_temp_input:
+ return get_dimm_temp(priv, channel, val);
+ case hwmon_temp_max:
+ return get_dimm_thresholds(priv, temp_max_type, channel, val);
+ case hwmon_temp_crit:
+ return get_dimm_thresholds(priv, temp_crit_type, channel, val);
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static umode_t dimmtemp_is_visible(const void *data, enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ const struct peci_dimmtemp *priv = data;
+
+ if (test_bit(channel, priv->dimm_mask))
+ return 0444;
+
+ return 0;
+}
+
+static const struct hwmon_ops peci_dimmtemp_ops = {
+ .is_visible = dimmtemp_is_visible,
+ .read_string = dimmtemp_read_string,
+ .read = dimmtemp_read,
+};
+
+static int check_populated_dimms(struct peci_dimmtemp *priv)
+{
+ int chan_rank_max = priv->gen_info->chan_rank_max;
+ int dimm_idx_max = priv->gen_info->dimm_idx_max;
+ u32 chan_rank_empty = 0;
+ u64 dimm_mask = 0;
+ int chan_rank, dimm_idx, ret;
+ u32 pcs;
+
+ BUILD_BUG_ON(BITS_PER_TYPE(chan_rank_empty) < CHAN_RANK_MAX);
+ BUILD_BUG_ON(BITS_PER_TYPE(dimm_mask) < DIMM_NUMS_MAX);
+ if (chan_rank_max * dimm_idx_max > DIMM_NUMS_MAX) {
+ WARN_ONCE(1, "Unsupported number of DIMMs - chan_rank_max: %d, dimm_idx_max: %d",
+ chan_rank_max, dimm_idx_max);
+ return -EINVAL;
+ }
+
+ for (chan_rank = 0; chan_rank < chan_rank_max; chan_rank++) {
+ ret = peci_pcs_read(priv->peci_dev, PECI_PCS_DDR_DIMM_TEMP, chan_rank, &pcs);
+ if (ret) {
+ /*
+ * Overall, we expect either success or -EINVAL in
+ * order to determine whether DIMM is populated or not.
+ * For anything else we fall back to deferring the
+ * detection to be performed at a later point in time.
+ */
+ if (ret == -EINVAL) {
+ chan_rank_empty |= BIT(chan_rank);
+ continue;
+ }
+
+ return -EAGAIN;
+ }
+
+ for (dimm_idx = 0; dimm_idx < dimm_idx_max; dimm_idx++)
+ if (__dimm_temp(pcs, dimm_idx))
+ dimm_mask |= BIT(chan_rank * dimm_idx_max + dimm_idx);
+ }
+
+ /*
+ * If we got all -EINVALs, it means that the CPU doesn't have any
+ * DIMMs. Unfortunately, it may also happen at the very start of
+ * host platform boot. Retrying a couple of times lets us make sure
+ * that the state is persistent.
+ */
+ if (chan_rank_empty == GENMASK(chan_rank_max - 1, 0)) {
+ if (priv->no_dimm_retry_count < NO_DIMM_RETRY_COUNT_MAX) {
+ priv->no_dimm_retry_count++;
+
+ return -EAGAIN;
+ } else {
+ return -ENODEV;
+ }
+ }
+
+ /*
+ * It's possible that memory training is not done yet. In this case we
+ * defer the detection to be performed at a later point in time.
+ */
+ if (!dimm_mask) {
+ priv->no_dimm_retry_count = 0;
+ return -EAGAIN;
+ }
+
+ dev_dbg(priv->dev, "Scanned populated DIMMs: %#llx\n", dimm_mask);
+
+ bitmap_from_u64(priv->dimm_mask, dimm_mask);
+
+ return 0;
+}
+
+static int create_dimm_temp_label(struct peci_dimmtemp *priv, int chan)
+{
+ int rank = chan / priv->gen_info->dimm_idx_max;
+ int idx = chan % priv->gen_info->dimm_idx_max;
+
+ priv->dimmtemp_label[chan] = devm_kasprintf(priv->dev, GFP_KERNEL,
+ "DIMM %c%d", 'A' + rank,
+ idx + 1);
+ if (!priv->dimmtemp_label[chan])
+ return -ENOMEM;
+
+ return 0;
+}
+
+static const u32 peci_dimmtemp_temp_channel_config[] = {
+ [0 ... DIMM_NUMS_MAX - 1] = HWMON_T_LABEL | HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT,
+ 0
+};
+
+static const struct hwmon_channel_info peci_dimmtemp_temp_channel = {
+ .type = hwmon_temp,
+ .config = peci_dimmtemp_temp_channel_config,
+};
+
+static const struct hwmon_channel_info *peci_dimmtemp_temp_info[] = {
+ &peci_dimmtemp_temp_channel,
+ NULL
+};
+
+static const struct hwmon_chip_info peci_dimmtemp_chip_info = {
+ .ops = &peci_dimmtemp_ops,
+ .info = peci_dimmtemp_temp_info,
+};
+
+static int create_dimm_temp_info(struct peci_dimmtemp *priv)
+{
+ int ret, i, channels;
+ struct device *dev;
+
+ /*
+ * We expect to either find populated DIMMs and carry on with creating
+ * sensors, or find out that there are no DIMMs populated.
+ * All other states mean that the platform never reached the state that
+ * allows to check DIMM state - causing us to retry later on.
+ */
+ ret = check_populated_dimms(priv);
+ if (ret == -ENODEV) {
+ dev_dbg(priv->dev, "No DIMMs found\n");
+ return 0;
+ } else if (ret) {
+ schedule_delayed_work(&priv->detect_work, DIMM_MASK_CHECK_DELAY_JIFFIES);
+ dev_dbg(priv->dev, "Deferred populating DIMM temp info\n");
+ return ret;
+ }
+
+ channels = priv->gen_info->chan_rank_max * priv->gen_info->dimm_idx_max;
+
+ priv->dimmtemp_label = devm_kzalloc(priv->dev, channels * sizeof(char *), GFP_KERNEL);
+ if (!priv->dimmtemp_label)
+ return -ENOMEM;
+
+ for_each_set_bit(i, priv->dimm_mask, DIMM_NUMS_MAX) {
+ ret = create_dimm_temp_label(priv, i);
+ if (ret)
+ return ret;
+ mutex_init(&priv->dimm[i].thresholds.state.lock);
+ mutex_init(&priv->dimm[i].temp.state.lock);
+ }
+
+ dev = devm_hwmon_device_register_with_info(priv->dev, priv->name, priv,
+ &peci_dimmtemp_chip_info, NULL);
+ if (IS_ERR(dev)) {
+ dev_err(priv->dev, "Failed to register hwmon device\n");
+ return PTR_ERR(dev);
+ }
+
+ dev_dbg(priv->dev, "%s: sensor '%s'\n", dev_name(dev), priv->name);
+
+ return 0;
+}
+
+static void create_dimm_temp_info_delayed(struct work_struct *work)
+{
+ struct peci_dimmtemp *priv = container_of(to_delayed_work(work),
+ struct peci_dimmtemp,
+ detect_work);
+ int ret;
+
+ ret = create_dimm_temp_info(priv);
+ if (ret && ret != -EAGAIN)
+ dev_err(priv->dev, "Failed to populate DIMM temp info\n");
+}
+
+static void remove_delayed_work(void *_priv)
+{
+ struct peci_dimmtemp *priv = _priv;
+
+ cancel_delayed_work_sync(&priv->detect_work);
+}
+
+static int peci_dimmtemp_probe(struct auxiliary_device *adev, const struct auxiliary_device_id *id)
+{
+ struct device *dev = &adev->dev;
+ struct peci_device *peci_dev = to_peci_device(dev->parent);
+ struct peci_dimmtemp *priv;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->name = devm_kasprintf(dev, GFP_KERNEL, "peci_dimmtemp.cpu%d",
+ peci_dev->info.socket_id);
+ if (!priv->name)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ priv->peci_dev = peci_dev;
+ priv->gen_info = (const struct dimm_info *)id->driver_data;
+
+ /*
+ * This is just a sanity check. Since we're using commands that are
+ * guaranteed to be supported on a given platform, we should never see
+ * revision lower than expected.
+ */
+ if (peci_dev->info.peci_revision < priv->gen_info->min_peci_revision)
+ dev_warn(priv->dev,
+ "Unexpected PECI revision %#x, some features may be unavailable\n",
+ peci_dev->info.peci_revision);
+
+ INIT_DELAYED_WORK(&priv->detect_work, create_dimm_temp_info_delayed);
+
+ ret = devm_add_action_or_reset(priv->dev, remove_delayed_work, priv);
+ if (ret)
+ return ret;
+
+ ret = create_dimm_temp_info(priv);
+ if (ret && ret != -EAGAIN) {
+ dev_err(dev, "Failed to populate DIMM temp info\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int
+read_thresholds_hsx(struct peci_dimmtemp *priv, int dimm_order, int chan_rank, u32 *data)
+{
+ u8 dev, func;
+ u16 reg;
+ int ret;
+
+ /*
+ * Device 20, Function 0: IMC 0 channel 0 -> rank 0
+ * Device 20, Function 1: IMC 0 channel 1 -> rank 1
+ * Device 21, Function 0: IMC 0 channel 2 -> rank 2
+ * Device 21, Function 1: IMC 0 channel 3 -> rank 3
+ * Device 23, Function 0: IMC 1 channel 0 -> rank 4
+ * Device 23, Function 1: IMC 1 channel 1 -> rank 5
+ * Device 24, Function 0: IMC 1 channel 2 -> rank 6
+ * Device 24, Function 1: IMC 1 channel 3 -> rank 7
+ */
+ dev = 20 + chan_rank / 2 + chan_rank / 4;
+ func = chan_rank % 2;
+ reg = 0x120 + dimm_order * 4;
+
+ ret = peci_pci_local_read(priv->peci_dev, 1, dev, func, reg, data);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int
+read_thresholds_bdxd(struct peci_dimmtemp *priv, int dimm_order, int chan_rank, u32 *data)
+{
+ u8 dev, func;
+ u16 reg;
+ int ret;
+
+ /*
+ * Device 10, Function 2: IMC 0 channel 0 -> rank 0
+ * Device 10, Function 6: IMC 0 channel 1 -> rank 1
+ * Device 12, Function 2: IMC 1 channel 0 -> rank 2
+ * Device 12, Function 6: IMC 1 channel 1 -> rank 3
+ */
+ dev = 10 + chan_rank / 2 * 2;
+ func = (chan_rank % 2) ? 6 : 2;
+ reg = 0x120 + dimm_order * 4;
+
+ ret = peci_pci_local_read(priv->peci_dev, 2, dev, func, reg, data);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int
+read_thresholds_skx(struct peci_dimmtemp *priv, int dimm_order, int chan_rank, u32 *data)
+{
+ u8 dev, func;
+ u16 reg;
+ int ret;
+
+ /*
+ * Device 10, Function 2: IMC 0 channel 0 -> rank 0
+ * Device 10, Function 6: IMC 0 channel 1 -> rank 1
+ * Device 11, Function 2: IMC 0 channel 2 -> rank 2
+ * Device 12, Function 2: IMC 1 channel 0 -> rank 3
+ * Device 12, Function 6: IMC 1 channel 1 -> rank 4
+ * Device 13, Function 2: IMC 1 channel 2 -> rank 5
+ */
+ dev = 10 + chan_rank / 3 * 2 + (chan_rank % 3 == 2 ? 1 : 0);
+ func = chan_rank % 3 == 1 ? 6 : 2;
+ reg = 0x120 + dimm_order * 4;
+
+ ret = peci_pci_local_read(priv->peci_dev, 2, dev, func, reg, data);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int
+read_thresholds_icx(struct peci_dimmtemp *priv, int dimm_order, int chan_rank, u32 *data)
+{
+ u32 reg_val;
+ u64 offset;
+ int ret;
+ u8 dev;
+
+ ret = peci_ep_pci_local_read(priv->peci_dev, 0, 13, 0, 2, 0xd4, &reg_val);
+ if (ret || !(reg_val & BIT(31)))
+ return -ENODATA; /* Use default or previous value */
+
+ ret = peci_ep_pci_local_read(priv->peci_dev, 0, 13, 0, 2, 0xd0, &reg_val);
+ if (ret)
+ return -ENODATA; /* Use default or previous value */
+
+ /*
+ * Device 26, Offset 224e0: IMC 0 channel 0 -> rank 0
+ * Device 26, Offset 264e0: IMC 0 channel 1 -> rank 1
+ * Device 27, Offset 224e0: IMC 1 channel 0 -> rank 2
+ * Device 27, Offset 264e0: IMC 1 channel 1 -> rank 3
+ * Device 28, Offset 224e0: IMC 2 channel 0 -> rank 4
+ * Device 28, Offset 264e0: IMC 2 channel 1 -> rank 5
+ * Device 29, Offset 224e0: IMC 3 channel 0 -> rank 6
+ * Device 29, Offset 264e0: IMC 3 channel 1 -> rank 7
+ */
+ dev = 26 + chan_rank / 2;
+ offset = 0x224e0 + dimm_order * 4 + (chan_rank % 2) * 0x4000;
+
+ ret = peci_mmio_read(priv->peci_dev, 0, GET_CPU_SEG(reg_val), GET_CPU_BUS(reg_val),
+ dev, 0, offset, data);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct dimm_info dimm_hsx = {
+ .chan_rank_max = CHAN_RANK_MAX_ON_HSX,
+ .dimm_idx_max = DIMM_IDX_MAX_ON_HSX,
+ .min_peci_revision = 0x33,
+ .read_thresholds = &read_thresholds_hsx,
+};
+
+static const struct dimm_info dimm_bdx = {
+ .chan_rank_max = CHAN_RANK_MAX_ON_BDX,
+ .dimm_idx_max = DIMM_IDX_MAX_ON_BDX,
+ .min_peci_revision = 0x33,
+ .read_thresholds = &read_thresholds_hsx,
+};
+
+static const struct dimm_info dimm_bdxd = {
+ .chan_rank_max = CHAN_RANK_MAX_ON_BDXD,
+ .dimm_idx_max = DIMM_IDX_MAX_ON_BDXD,
+ .min_peci_revision = 0x33,
+ .read_thresholds = &read_thresholds_bdxd,
+};
+
+static const struct dimm_info dimm_skx = {
+ .chan_rank_max = CHAN_RANK_MAX_ON_SKX,
+ .dimm_idx_max = DIMM_IDX_MAX_ON_SKX,
+ .min_peci_revision = 0x33,
+ .read_thresholds = &read_thresholds_skx,
+};
+
+static const struct dimm_info dimm_icx = {
+ .chan_rank_max = CHAN_RANK_MAX_ON_ICX,
+ .dimm_idx_max = DIMM_IDX_MAX_ON_ICX,
+ .min_peci_revision = 0x40,
+ .read_thresholds = &read_thresholds_icx,
+};
+
+static const struct dimm_info dimm_icxd = {
+ .chan_rank_max = CHAN_RANK_MAX_ON_ICXD,
+ .dimm_idx_max = DIMM_IDX_MAX_ON_ICXD,
+ .min_peci_revision = 0x40,
+ .read_thresholds = &read_thresholds_icx,
+};
+
+static const struct auxiliary_device_id peci_dimmtemp_ids[] = {
+ {
+ .name = "peci_cpu.dimmtemp.hsx",
+ .driver_data = (kernel_ulong_t)&dimm_hsx,
+ },
+ {
+ .name = "peci_cpu.dimmtemp.bdx",
+ .driver_data = (kernel_ulong_t)&dimm_bdx,
+ },
+ {
+ .name = "peci_cpu.dimmtemp.bdxd",
+ .driver_data = (kernel_ulong_t)&dimm_bdxd,
+ },
+ {
+ .name = "peci_cpu.dimmtemp.skx",
+ .driver_data = (kernel_ulong_t)&dimm_skx,
+ },
+ {
+ .name = "peci_cpu.dimmtemp.icx",
+ .driver_data = (kernel_ulong_t)&dimm_icx,
+ },
+ {
+ .name = "peci_cpu.dimmtemp.icxd",
+ .driver_data = (kernel_ulong_t)&dimm_icxd,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(auxiliary, peci_dimmtemp_ids);
+
+static struct auxiliary_driver peci_dimmtemp_driver = {
+ .probe = peci_dimmtemp_probe,
+ .id_table = peci_dimmtemp_ids,
+};
+
+module_auxiliary_driver(peci_dimmtemp_driver);
+
+MODULE_AUTHOR("Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>");
+MODULE_AUTHOR("Iwona Winiarska <iwona.winiarska@intel.com>");
+MODULE_DESCRIPTION("PECI dimmtemp driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(PECI_CPU);
--
2.31.1
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