diff options
Diffstat (limited to 'drivers/misc/habanalabs/common/hwmon.c')
-rw-r--r-- | drivers/misc/habanalabs/common/hwmon.c | 578 |
1 files changed, 578 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/common/hwmon.c b/drivers/misc/habanalabs/common/hwmon.c new file mode 100644 index 000000000..2ac29cb2f --- /dev/null +++ b/drivers/misc/habanalabs/common/hwmon.c @@ -0,0 +1,578 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Copyright 2016-2019 HabanaLabs, Ltd. + * All Rights Reserved. + */ + +#include "habanalabs.h" + +#include <linux/pci.h> +#include <linux/hwmon.h> + +#define HWMON_NR_SENSOR_TYPES (hwmon_pwm + 1) + +int hl_build_hwmon_channel_info(struct hl_device *hdev, + struct cpucp_sensor *sensors_arr) +{ + u32 counts[HWMON_NR_SENSOR_TYPES] = {0}; + u32 *sensors_by_type[HWMON_NR_SENSOR_TYPES] = {NULL}; + u32 sensors_by_type_next_index[HWMON_NR_SENSOR_TYPES] = {0}; + struct hwmon_channel_info **channels_info; + u32 num_sensors_for_type, num_active_sensor_types = 0, + arr_size = 0, *curr_arr; + enum hwmon_sensor_types type; + int rc, i, j; + + for (i = 0 ; i < CPUCP_MAX_SENSORS ; i++) { + type = le32_to_cpu(sensors_arr[i].type); + + if ((type == 0) && (sensors_arr[i].flags == 0)) + break; + + if (type >= HWMON_NR_SENSOR_TYPES) { + dev_err(hdev->dev, + "Got wrong sensor type %d from device\n", type); + return -EINVAL; + } + + counts[type]++; + arr_size++; + } + + for (i = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) { + if (counts[i] == 0) + continue; + + num_sensors_for_type = counts[i] + 1; + curr_arr = kcalloc(num_sensors_for_type, sizeof(*curr_arr), + GFP_KERNEL); + if (!curr_arr) { + rc = -ENOMEM; + goto sensors_type_err; + } + + num_active_sensor_types++; + sensors_by_type[i] = curr_arr; + } + + for (i = 0 ; i < arr_size ; i++) { + type = le32_to_cpu(sensors_arr[i].type); + curr_arr = sensors_by_type[type]; + curr_arr[sensors_by_type_next_index[type]++] = + le32_to_cpu(sensors_arr[i].flags); + } + + channels_info = kcalloc(num_active_sensor_types + 1, + sizeof(*channels_info), GFP_KERNEL); + if (!channels_info) { + rc = -ENOMEM; + goto channels_info_array_err; + } + + for (i = 0 ; i < num_active_sensor_types ; i++) { + channels_info[i] = kzalloc(sizeof(*channels_info[i]), + GFP_KERNEL); + if (!channels_info[i]) { + rc = -ENOMEM; + goto channel_info_err; + } + } + + for (i = 0, j = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) { + if (!sensors_by_type[i]) + continue; + + channels_info[j]->type = i; + channels_info[j]->config = sensors_by_type[i]; + j++; + } + + hdev->hl_chip_info->info = + (const struct hwmon_channel_info **)channels_info; + + return 0; + +channel_info_err: + for (i = 0 ; i < num_active_sensor_types ; i++) + if (channels_info[i]) { + kfree(channels_info[i]->config); + kfree(channels_info[i]); + } + kfree(channels_info); +channels_info_array_err: +sensors_type_err: + for (i = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) + kfree(sensors_by_type[i]); + + return rc; +} + +static int hl_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + int rc; + + if (hl_device_disabled_or_in_reset(hdev)) + return -ENODEV; + + switch (type) { + case hwmon_temp: + switch (attr) { + case hwmon_temp_input: + case hwmon_temp_max: + case hwmon_temp_crit: + case hwmon_temp_max_hyst: + case hwmon_temp_crit_hyst: + case hwmon_temp_offset: + case hwmon_temp_highest: + break; + default: + return -EINVAL; + } + + rc = hl_get_temperature(hdev, channel, attr, val); + break; + case hwmon_in: + switch (attr) { + case hwmon_in_input: + case hwmon_in_min: + case hwmon_in_max: + case hwmon_in_highest: + break; + default: + return -EINVAL; + } + + rc = hl_get_voltage(hdev, channel, attr, val); + break; + case hwmon_curr: + switch (attr) { + case hwmon_curr_input: + case hwmon_curr_min: + case hwmon_curr_max: + case hwmon_curr_highest: + break; + default: + return -EINVAL; + } + + rc = hl_get_current(hdev, channel, attr, val); + break; + case hwmon_fan: + switch (attr) { + case hwmon_fan_input: + case hwmon_fan_min: + case hwmon_fan_max: + break; + default: + return -EINVAL; + } + rc = hl_get_fan_speed(hdev, channel, attr, val); + break; + case hwmon_pwm: + switch (attr) { + case hwmon_pwm_input: + case hwmon_pwm_enable: + break; + default: + return -EINVAL; + } + rc = hl_get_pwm_info(hdev, channel, attr, val); + break; + default: + return -EINVAL; + } + return rc; +} + +static int hl_write(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long val) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + if (hl_device_disabled_or_in_reset(hdev)) + return -ENODEV; + + switch (type) { + case hwmon_temp: + switch (attr) { + case hwmon_temp_offset: + case hwmon_temp_reset_history: + break; + default: + return -EINVAL; + } + hl_set_temperature(hdev, channel, attr, val); + break; + case hwmon_pwm: + switch (attr) { + case hwmon_pwm_input: + case hwmon_pwm_enable: + break; + default: + return -EINVAL; + } + hl_set_pwm_info(hdev, channel, attr, val); + break; + case hwmon_in: + switch (attr) { + case hwmon_in_reset_history: + break; + default: + return -EINVAL; + } + hl_set_voltage(hdev, channel, attr, val); + break; + case hwmon_curr: + switch (attr) { + case hwmon_curr_reset_history: + break; + default: + return -EINVAL; + } + hl_set_current(hdev, channel, attr, val); + break; + default: + return -EINVAL; + } + return 0; +} + +static umode_t hl_is_visible(const void *data, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (type) { + case hwmon_temp: + switch (attr) { + case hwmon_temp_input: + case hwmon_temp_max: + case hwmon_temp_max_hyst: + case hwmon_temp_crit: + case hwmon_temp_crit_hyst: + case hwmon_temp_highest: + return 0444; + case hwmon_temp_offset: + return 0644; + case hwmon_temp_reset_history: + return 0200; + } + break; + case hwmon_in: + switch (attr) { + case hwmon_in_input: + case hwmon_in_min: + case hwmon_in_max: + case hwmon_in_highest: + return 0444; + case hwmon_in_reset_history: + return 0200; + } + break; + case hwmon_curr: + switch (attr) { + case hwmon_curr_input: + case hwmon_curr_min: + case hwmon_curr_max: + case hwmon_curr_highest: + return 0444; + case hwmon_curr_reset_history: + return 0200; + } + break; + case hwmon_fan: + switch (attr) { + case hwmon_fan_input: + case hwmon_fan_min: + case hwmon_fan_max: + return 0444; + } + break; + case hwmon_pwm: + switch (attr) { + case hwmon_pwm_input: + case hwmon_pwm_enable: + return 0644; + } + break; + default: + break; + } + return 0; +} + +static const struct hwmon_ops hl_hwmon_ops = { + .is_visible = hl_is_visible, + .read = hl_read, + .write = hl_write +}; + +int hl_get_temperature(struct hl_device *hdev, + int sensor_index, u32 attr, long *value) +{ + struct cpucp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = cpu_to_le32(CPUCP_PACKET_TEMPERATURE_GET << + CPUCP_PKT_CTL_OPCODE_SHIFT); + pkt.sensor_index = __cpu_to_le16(sensor_index); + pkt.type = __cpu_to_le16(attr); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + 0, value); + + if (rc) { + dev_err(hdev->dev, + "Failed to get temperature from sensor %d, error %d\n", + sensor_index, rc); + *value = 0; + } + + return rc; +} + +int hl_set_temperature(struct hl_device *hdev, + int sensor_index, u32 attr, long value) +{ + struct cpucp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = cpu_to_le32(CPUCP_PACKET_TEMPERATURE_SET << + CPUCP_PKT_CTL_OPCODE_SHIFT); + pkt.sensor_index = __cpu_to_le16(sensor_index); + pkt.type = __cpu_to_le16(attr); + pkt.value = __cpu_to_le64(value); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + 0, NULL); + + if (rc) + dev_err(hdev->dev, + "Failed to set temperature of sensor %d, error %d\n", + sensor_index, rc); + + return rc; +} + +int hl_get_voltage(struct hl_device *hdev, + int sensor_index, u32 attr, long *value) +{ + struct cpucp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = cpu_to_le32(CPUCP_PACKET_VOLTAGE_GET << + CPUCP_PKT_CTL_OPCODE_SHIFT); + pkt.sensor_index = __cpu_to_le16(sensor_index); + pkt.type = __cpu_to_le16(attr); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + 0, value); + + if (rc) { + dev_err(hdev->dev, + "Failed to get voltage from sensor %d, error %d\n", + sensor_index, rc); + *value = 0; + } + + return rc; +} + +int hl_get_current(struct hl_device *hdev, + int sensor_index, u32 attr, long *value) +{ + struct cpucp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = cpu_to_le32(CPUCP_PACKET_CURRENT_GET << + CPUCP_PKT_CTL_OPCODE_SHIFT); + pkt.sensor_index = __cpu_to_le16(sensor_index); + pkt.type = __cpu_to_le16(attr); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + 0, value); + + if (rc) { + dev_err(hdev->dev, + "Failed to get current from sensor %d, error %d\n", + sensor_index, rc); + *value = 0; + } + + return rc; +} + +int hl_get_fan_speed(struct hl_device *hdev, + int sensor_index, u32 attr, long *value) +{ + struct cpucp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = cpu_to_le32(CPUCP_PACKET_FAN_SPEED_GET << + CPUCP_PKT_CTL_OPCODE_SHIFT); + pkt.sensor_index = __cpu_to_le16(sensor_index); + pkt.type = __cpu_to_le16(attr); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + 0, value); + + if (rc) { + dev_err(hdev->dev, + "Failed to get fan speed from sensor %d, error %d\n", + sensor_index, rc); + *value = 0; + } + + return rc; +} + +int hl_get_pwm_info(struct hl_device *hdev, + int sensor_index, u32 attr, long *value) +{ + struct cpucp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = cpu_to_le32(CPUCP_PACKET_PWM_GET << + CPUCP_PKT_CTL_OPCODE_SHIFT); + pkt.sensor_index = __cpu_to_le16(sensor_index); + pkt.type = __cpu_to_le16(attr); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + 0, value); + + if (rc) { + dev_err(hdev->dev, + "Failed to get pwm info from sensor %d, error %d\n", + sensor_index, rc); + *value = 0; + } + + return rc; +} + +void hl_set_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr, + long value) +{ + struct cpucp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = cpu_to_le32(CPUCP_PACKET_PWM_SET << + CPUCP_PKT_CTL_OPCODE_SHIFT); + pkt.sensor_index = __cpu_to_le16(sensor_index); + pkt.type = __cpu_to_le16(attr); + pkt.value = cpu_to_le64(value); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + 0, NULL); + + if (rc) + dev_err(hdev->dev, + "Failed to set pwm info to sensor %d, error %d\n", + sensor_index, rc); +} + +int hl_set_voltage(struct hl_device *hdev, + int sensor_index, u32 attr, long value) +{ + struct cpucp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = cpu_to_le32(CPUCP_PACKET_VOLTAGE_SET << + CPUCP_PKT_CTL_OPCODE_SHIFT); + pkt.sensor_index = __cpu_to_le16(sensor_index); + pkt.type = __cpu_to_le16(attr); + pkt.value = __cpu_to_le64(value); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + 0, NULL); + + if (rc) + dev_err(hdev->dev, + "Failed to set voltage of sensor %d, error %d\n", + sensor_index, rc); + + return rc; +} + +int hl_set_current(struct hl_device *hdev, + int sensor_index, u32 attr, long value) +{ + struct cpucp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = cpu_to_le32(CPUCP_PACKET_CURRENT_SET << + CPUCP_PKT_CTL_OPCODE_SHIFT); + pkt.sensor_index = __cpu_to_le16(sensor_index); + pkt.type = __cpu_to_le16(attr); + pkt.value = __cpu_to_le64(value); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + 0, NULL); + + if (rc) + dev_err(hdev->dev, + "Failed to set current of sensor %d, error %d\n", + sensor_index, rc); + + return rc; +} + +int hl_hwmon_init(struct hl_device *hdev) +{ + struct device *dev = hdev->pdev ? &hdev->pdev->dev : hdev->dev; + struct asic_fixed_properties *prop = &hdev->asic_prop; + int rc; + + if ((hdev->hwmon_initialized) || !(hdev->fw_loading)) + return 0; + + if (hdev->hl_chip_info->info) { + hdev->hl_chip_info->ops = &hl_hwmon_ops; + + hdev->hwmon_dev = hwmon_device_register_with_info(dev, + prop->cpucp_info.card_name, hdev, + hdev->hl_chip_info, NULL); + if (IS_ERR(hdev->hwmon_dev)) { + rc = PTR_ERR(hdev->hwmon_dev); + dev_err(hdev->dev, + "Unable to register hwmon device: %d\n", rc); + return rc; + } + + dev_info(hdev->dev, "%s: add sensors information\n", + dev_name(hdev->hwmon_dev)); + + hdev->hwmon_initialized = true; + } else { + dev_info(hdev->dev, "no available sensors\n"); + } + + return 0; +} + +void hl_hwmon_fini(struct hl_device *hdev) +{ + if (!hdev->hwmon_initialized) + return; + + hwmon_device_unregister(hdev->hwmon_dev); +} |