diff options
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt/bnxt_hwmon.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt_hwmon.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_hwmon.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_hwmon.c new file mode 100644 index 000000000000..669d24ba0e87 --- /dev/null +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_hwmon.c @@ -0,0 +1,241 @@ +/* Broadcom NetXtreme-C/E network driver. + * + * Copyright (c) 2023 Broadcom Limited + * + * 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. + */ + +#include <linux/dev_printk.h> +#include <linux/errno.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/pci.h> + +#include "bnxt_hsi.h" +#include "bnxt.h" +#include "bnxt_hwrm.h" +#include "bnxt_hwmon.h" + +void bnxt_hwmon_notify_event(struct bnxt *bp) +{ + u32 attr; + + if (!bp->hwmon_dev) + return; + + switch (bp->thermal_threshold_type) { + case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_WARN: + attr = hwmon_temp_max_alarm; + break; + case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_CRITICAL: + attr = hwmon_temp_crit_alarm; + break; + case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_FATAL: + case ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA1_THRESHOLD_TYPE_SHUTDOWN: + attr = hwmon_temp_emergency_alarm; + break; + default: + return; + } + + hwmon_notify_event(&bp->pdev->dev, hwmon_temp, attr, 0); +} + +static int bnxt_hwrm_temp_query(struct bnxt *bp, u8 *temp) +{ + struct hwrm_temp_monitor_query_output *resp; + struct hwrm_temp_monitor_query_input *req; + int rc; + + rc = hwrm_req_init(bp, req, HWRM_TEMP_MONITOR_QUERY); + if (rc) + return rc; + resp = hwrm_req_hold(bp, req); + rc = hwrm_req_send_silent(bp, req); + if (rc) + goto drop_req; + + if (temp) { + *temp = resp->temp; + } else if (resp->flags & + TEMP_MONITOR_QUERY_RESP_FLAGS_THRESHOLD_VALUES_AVAILABLE) { + bp->fw_cap |= BNXT_FW_CAP_THRESHOLD_TEMP_SUPPORTED; + bp->warn_thresh_temp = resp->warn_threshold; + bp->crit_thresh_temp = resp->critical_threshold; + bp->fatal_thresh_temp = resp->fatal_threshold; + bp->shutdown_thresh_temp = resp->shutdown_threshold; + } +drop_req: + hwrm_req_drop(bp, req); + return rc; +} + +static umode_t bnxt_hwmon_is_visible(const void *_data, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + const struct bnxt *bp = _data; + + if (type != hwmon_temp) + return 0; + + switch (attr) { + case hwmon_temp_input: + return 0444; + case hwmon_temp_max: + case hwmon_temp_crit: + case hwmon_temp_emergency: + case hwmon_temp_max_alarm: + case hwmon_temp_crit_alarm: + case hwmon_temp_emergency_alarm: + if (!(bp->fw_cap & BNXT_FW_CAP_THRESHOLD_TEMP_SUPPORTED)) + return 0; + return 0444; + default: + return 0; + } +} + +static int bnxt_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, + int channel, long *val) +{ + struct bnxt *bp = dev_get_drvdata(dev); + u8 temp = 0; + int rc; + + switch (attr) { + case hwmon_temp_input: + rc = bnxt_hwrm_temp_query(bp, &temp); + if (!rc) + *val = temp * 1000; + return rc; + case hwmon_temp_max: + *val = bp->warn_thresh_temp * 1000; + return 0; + case hwmon_temp_crit: + *val = bp->crit_thresh_temp * 1000; + return 0; + case hwmon_temp_emergency: + *val = bp->fatal_thresh_temp * 1000; + return 0; + case hwmon_temp_max_alarm: + rc = bnxt_hwrm_temp_query(bp, &temp); + if (!rc) + *val = temp >= bp->warn_thresh_temp; + return rc; + case hwmon_temp_crit_alarm: + rc = bnxt_hwrm_temp_query(bp, &temp); + if (!rc) + *val = temp >= bp->crit_thresh_temp; + return rc; + case hwmon_temp_emergency_alarm: + rc = bnxt_hwrm_temp_query(bp, &temp); + if (!rc) + *val = temp >= bp->fatal_thresh_temp; + return rc; + default: + return -EOPNOTSUPP; + } +} + +static const struct hwmon_channel_info *bnxt_hwmon_info[] = { + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | + HWMON_T_EMERGENCY | HWMON_T_MAX_ALARM | + HWMON_T_CRIT_ALARM | HWMON_T_EMERGENCY_ALARM), + NULL +}; + +static const struct hwmon_ops bnxt_hwmon_ops = { + .is_visible = bnxt_hwmon_is_visible, + .read = bnxt_hwmon_read, +}; + +static const struct hwmon_chip_info bnxt_hwmon_chip_info = { + .ops = &bnxt_hwmon_ops, + .info = bnxt_hwmon_info, +}; + +static ssize_t temp1_shutdown_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bnxt *bp = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%u\n", bp->shutdown_thresh_temp * 1000); +} + +static ssize_t temp1_shutdown_alarm_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bnxt *bp = dev_get_drvdata(dev); + u8 temp; + int rc; + + rc = bnxt_hwrm_temp_query(bp, &temp); + if (rc) + return -EIO; + + return sysfs_emit(buf, "%u\n", temp >= bp->shutdown_thresh_temp); +} + +static DEVICE_ATTR_RO(temp1_shutdown); +static DEVICE_ATTR_RO(temp1_shutdown_alarm); + +static struct attribute *bnxt_temp_extra_attrs[] = { + &dev_attr_temp1_shutdown.attr, + &dev_attr_temp1_shutdown_alarm.attr, + NULL, +}; + +static umode_t bnxt_temp_extra_attrs_visible(struct kobject *kobj, + struct attribute *attr, int index) +{ + struct device *dev = kobj_to_dev(kobj); + struct bnxt *bp = dev_get_drvdata(dev); + + /* Shutdown temperature setting in NVM is optional */ + if (!(bp->fw_cap & BNXT_FW_CAP_THRESHOLD_TEMP_SUPPORTED) || + !bp->shutdown_thresh_temp) + return 0; + + return attr->mode; +} + +static const struct attribute_group bnxt_temp_extra_group = { + .attrs = bnxt_temp_extra_attrs, + .is_visible = bnxt_temp_extra_attrs_visible, +}; +__ATTRIBUTE_GROUPS(bnxt_temp_extra); + +void bnxt_hwmon_uninit(struct bnxt *bp) +{ + if (bp->hwmon_dev) { + hwmon_device_unregister(bp->hwmon_dev); + bp->hwmon_dev = NULL; + } +} + +void bnxt_hwmon_init(struct bnxt *bp) +{ + struct pci_dev *pdev = bp->pdev; + int rc; + + /* temp1_xxx is only sensor, ensure not registered if it will fail */ + rc = bnxt_hwrm_temp_query(bp, NULL); + if (rc == -EACCES || rc == -EOPNOTSUPP) { + bnxt_hwmon_uninit(bp); + return; + } + + if (bp->hwmon_dev) + return; + + bp->hwmon_dev = hwmon_device_register_with_info(&pdev->dev, + DRV_MODULE_NAME, bp, + &bnxt_hwmon_chip_info, + bnxt_temp_extra_groups); + if (IS_ERR(bp->hwmon_dev)) { + bp->hwmon_dev = NULL; + dev_warn(&pdev->dev, "Cannot register hwmon device\n"); + } +} |