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![David Brunecz](/assets/img/avatar_default.png)
Add support for retrieving temperature and power sensor and limits via NSP. Signed-off-by: David Brunecz <david.brunecz@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
192 lines
4.8 KiB
C
192 lines
4.8 KiB
C
/*
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* Copyright (C) 2017 Netronome Systems, Inc.
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*
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* This software is dual licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree or the BSD 2-Clause License provided below. You have the
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* option to license this software under the complete terms of either license.
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*
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* The BSD 2-Clause License:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/kernel.h>
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#include <linux/bitops.h>
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#include <linux/hwmon.h>
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#include "nfpcore/nfp_cpp.h"
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#include "nfpcore/nfp_nsp.h"
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#include "nfp_main.h"
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#define NFP_TEMP_MAX (95 * 1000)
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#define NFP_TEMP_CRIT (105 * 1000)
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#define NFP_POWER_MAX (25 * 1000 * 1000)
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static int nfp_hwmon_sensor_id(enum hwmon_sensor_types type, int channel)
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{
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if (type == hwmon_temp)
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return NFP_SENSOR_CHIP_TEMPERATURE;
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if (type == hwmon_power)
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return NFP_SENSOR_ASSEMBLY_POWER + channel;
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return -EINVAL;
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}
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static int
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nfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
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int channel, long *val)
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{
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static const struct {
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enum hwmon_sensor_types type;
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u32 attr;
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long val;
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} const_vals[] = {
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{ hwmon_temp, hwmon_temp_max, NFP_TEMP_MAX },
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{ hwmon_temp, hwmon_temp_crit, NFP_TEMP_CRIT },
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{ hwmon_power, hwmon_power_max, NFP_POWER_MAX },
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};
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struct nfp_pf *pf = dev_get_drvdata(dev);
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enum nfp_nsp_sensor_id id;
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int err, i;
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for (i = 0; i < ARRAY_SIZE(const_vals); i++)
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if (const_vals[i].type == type && const_vals[i].attr == attr) {
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*val = const_vals[i].val;
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return 0;
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}
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err = nfp_hwmon_sensor_id(type, channel);
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if (err < 0)
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return err;
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id = err;
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if (!(pf->nspi->sensor_mask & BIT(id)))
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return -EOPNOTSUPP;
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if (type == hwmon_temp && attr == hwmon_temp_input)
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return nfp_hwmon_read_sensor(pf->cpp, id, val);
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if (type == hwmon_power && attr == hwmon_power_input)
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return nfp_hwmon_read_sensor(pf->cpp, id, val);
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return -EINVAL;
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}
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static umode_t
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nfp_hwmon_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr,
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int channel)
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{
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if (type == hwmon_temp) {
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switch (attr) {
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case hwmon_temp_input:
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case hwmon_temp_crit:
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case hwmon_temp_max:
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return 0444;
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}
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} else if (type == hwmon_power) {
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switch (attr) {
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case hwmon_power_input:
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case hwmon_power_max:
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return 0444;
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}
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}
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return 0;
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}
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static u32 nfp_chip_config[] = {
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HWMON_C_REGISTER_TZ,
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0
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};
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static const struct hwmon_channel_info nfp_chip = {
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.type = hwmon_chip,
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.config = nfp_chip_config,
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};
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static u32 nfp_temp_config[] = {
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT,
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0
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};
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static const struct hwmon_channel_info nfp_temp = {
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.type = hwmon_temp,
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.config = nfp_temp_config,
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};
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static u32 nfp_power_config[] = {
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HWMON_P_INPUT | HWMON_P_MAX,
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HWMON_P_INPUT,
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HWMON_P_INPUT,
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0
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};
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static const struct hwmon_channel_info nfp_power = {
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.type = hwmon_power,
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.config = nfp_power_config,
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};
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static const struct hwmon_channel_info *nfp_hwmon_info[] = {
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&nfp_chip,
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&nfp_temp,
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&nfp_power,
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NULL
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};
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static const struct hwmon_ops nfp_hwmon_ops = {
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.is_visible = nfp_hwmon_is_visible,
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.read = nfp_hwmon_read,
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};
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static const struct hwmon_chip_info nfp_chip_info = {
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.ops = &nfp_hwmon_ops,
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.info = nfp_hwmon_info,
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};
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int nfp_hwmon_register(struct nfp_pf *pf)
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{
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if (!IS_REACHABLE(CONFIG_HWMON))
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return 0;
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if (!pf->nspi) {
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nfp_warn(pf->cpp, "not registering HWMON (no NSP info)\n");
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return 0;
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}
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if (!pf->nspi->sensor_mask) {
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nfp_info(pf->cpp,
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"not registering HWMON (NSP doesn't report sensors)\n");
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return 0;
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}
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pf->hwmon_dev = hwmon_device_register_with_info(&pf->pdev->dev, "nfp",
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pf, &nfp_chip_info,
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NULL);
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return PTR_ERR_OR_ZERO(pf->hwmon_dev);
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}
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void nfp_hwmon_unregister(struct nfp_pf *pf)
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{
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if (!IS_REACHABLE(CONFIG_HWMON) || !pf->hwmon_dev)
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return;
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hwmon_device_unregister(pf->hwmon_dev);
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}
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