diff options
Diffstat (limited to 'drivers/vdpa/solidrun/snet_hwmon.c')
| -rw-r--r-- | drivers/vdpa/solidrun/snet_hwmon.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/vdpa/solidrun/snet_hwmon.c b/drivers/vdpa/solidrun/snet_hwmon.c new file mode 100644 index 000000000..af531a339 --- /dev/null +++ b/drivers/vdpa/solidrun/snet_hwmon.c @@ -0,0 +1,188 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * SolidRun DPU driver for control plane + * + * Copyright (C) 2022-2023 SolidRun + * + * Author: Alvaro Karsz <alvaro.karsz@solid-run.com> + * + */ +#include <linux/hwmon.h> + +#include "snet_vdpa.h" + +/* Monitor offsets */ +#define SNET_MON_TMP0_IN_OFF 0x00 +#define SNET_MON_TMP0_MAX_OFF 0x08 +#define SNET_MON_TMP0_CRIT_OFF 0x10 +#define SNET_MON_TMP1_IN_OFF 0x18 +#define SNET_MON_TMP1_CRIT_OFF 0x20 +#define SNET_MON_CURR_IN_OFF 0x28 +#define SNET_MON_CURR_MAX_OFF 0x30 +#define SNET_MON_CURR_CRIT_OFF 0x38 +#define SNET_MON_PWR_IN_OFF 0x40 +#define SNET_MON_VOLT_IN_OFF 0x48 +#define SNET_MON_VOLT_CRIT_OFF 0x50 +#define SNET_MON_VOLT_LCRIT_OFF 0x58 + +static void snet_hwmon_read_reg(struct psnet *psnet, u32 reg, long *out) +{ + *out = psnet_read64(psnet, psnet->cfg.hwmon_off + reg); +} + +static umode_t snet_howmon_is_visible(const void *data, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + return 0444; +} + +static int snet_howmon_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + struct psnet *psnet = dev_get_drvdata(dev); + int ret = 0; + + switch (type) { + case hwmon_in: + switch (attr) { + case hwmon_in_lcrit: + snet_hwmon_read_reg(psnet, SNET_MON_VOLT_LCRIT_OFF, val); + break; + case hwmon_in_crit: + snet_hwmon_read_reg(psnet, SNET_MON_VOLT_CRIT_OFF, val); + break; + case hwmon_in_input: + snet_hwmon_read_reg(psnet, SNET_MON_VOLT_IN_OFF, val); + break; + default: + ret = -EOPNOTSUPP; + break; + } + break; + + case hwmon_power: + switch (attr) { + case hwmon_power_input: + snet_hwmon_read_reg(psnet, SNET_MON_PWR_IN_OFF, val); + break; + + default: + ret = -EOPNOTSUPP; + break; + } + break; + + case hwmon_curr: + switch (attr) { + case hwmon_curr_input: + snet_hwmon_read_reg(psnet, SNET_MON_CURR_IN_OFF, val); + break; + case hwmon_curr_max: + snet_hwmon_read_reg(psnet, SNET_MON_CURR_MAX_OFF, val); + break; + case hwmon_curr_crit: + snet_hwmon_read_reg(psnet, SNET_MON_CURR_CRIT_OFF, val); + break; + default: + ret = -EOPNOTSUPP; + break; + } + break; + + case hwmon_temp: + switch (attr) { + case hwmon_temp_input: + if (channel == 0) + snet_hwmon_read_reg(psnet, SNET_MON_TMP0_IN_OFF, val); + else + snet_hwmon_read_reg(psnet, SNET_MON_TMP1_IN_OFF, val); + break; + case hwmon_temp_max: + if (channel == 0) + snet_hwmon_read_reg(psnet, SNET_MON_TMP0_MAX_OFF, val); + else + ret = -EOPNOTSUPP; + break; + case hwmon_temp_crit: + if (channel == 0) + snet_hwmon_read_reg(psnet, SNET_MON_TMP0_CRIT_OFF, val); + else + snet_hwmon_read_reg(psnet, SNET_MON_TMP1_CRIT_OFF, val); + break; + + default: + ret = -EOPNOTSUPP; + break; + } + break; + + default: + ret = -EOPNOTSUPP; + break; + } + return ret; +} + +static int snet_hwmon_read_string(struct device *dev, + enum hwmon_sensor_types type, u32 attr, + int channel, const char **str) +{ + int ret = 0; + + switch (type) { + case hwmon_in: + *str = "main_vin"; + break; + case hwmon_power: + *str = "soc_pin"; + break; + case hwmon_curr: + *str = "soc_iin"; + break; + case hwmon_temp: + if (channel == 0) + *str = "power_stage_temp"; + else + *str = "ic_junction_temp"; + break; + default: + ret = -EOPNOTSUPP; + break; + } + return ret; +} + +static const struct hwmon_ops snet_hwmon_ops = { + .is_visible = snet_howmon_is_visible, + .read = snet_howmon_read, + .read_string = snet_hwmon_read_string +}; + +static const struct hwmon_channel_info * const snet_hwmon_info[] = { + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_LABEL), + HWMON_CHANNEL_INFO(power, HWMON_P_INPUT | HWMON_P_LABEL), + HWMON_CHANNEL_INFO(curr, HWMON_C_INPUT | HWMON_C_MAX | HWMON_C_CRIT | HWMON_C_LABEL), + HWMON_CHANNEL_INFO(in, HWMON_I_INPUT | HWMON_I_CRIT | HWMON_I_LCRIT | HWMON_I_LABEL), + NULL +}; + +static const struct hwmon_chip_info snet_hwmono_info = { + .ops = &snet_hwmon_ops, + .info = snet_hwmon_info, +}; + +/* Create an HW monitor device */ +void psnet_create_hwmon(struct pci_dev *pdev) +{ + struct device *hwmon; + struct psnet *psnet = pci_get_drvdata(pdev); + + snprintf(psnet->hwmon_name, SNET_NAME_SIZE, "snet_%s", pci_name(pdev)); + hwmon = devm_hwmon_device_register_with_info(&pdev->dev, psnet->hwmon_name, psnet, + &snet_hwmono_info, NULL); + /* The monitor is not mandatory, Just alert user in case of an error */ + if (IS_ERR(hwmon)) + SNET_WARN(pdev, "Failed to create SNET hwmon, error %ld\n", PTR_ERR(hwmon)); +} |