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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>
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David Brunecz
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David S. Miller
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May 30, 2017
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| /* | ||
| * Copyright (C) 2017 Netronome Systems, Inc. | ||
| * | ||
| * This software is dual licensed under the GNU General License Version 2, | ||
| * June 1991 as shown in the file COPYING in the top-level directory of this | ||
| * source tree or the BSD 2-Clause License provided below. You have the | ||
| * option to license this software under the complete terms of either license. | ||
| * | ||
| * The BSD 2-Clause License: | ||
| * | ||
| * Redistribution and use in source and binary forms, with or | ||
| * without modification, are permitted provided that the following | ||
| * conditions are met: | ||
| * | ||
| * 1. Redistributions of source code must retain the above | ||
| * copyright notice, this list of conditions and the following | ||
| * disclaimer. | ||
| * | ||
| * 2. Redistributions in binary form must reproduce the above | ||
| * copyright notice, this list of conditions and the following | ||
| * disclaimer in the documentation and/or other materials | ||
| * provided with the distribution. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | ||
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | ||
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
|
|
||
| #include <linux/kernel.h> | ||
| #include <linux/bitops.h> | ||
| #include <linux/hwmon.h> | ||
|
|
||
| #include "nfpcore/nfp_cpp.h" | ||
| #include "nfpcore/nfp_nsp.h" | ||
| #include "nfp_main.h" | ||
|
|
||
| #define NFP_TEMP_MAX (95 * 1000) | ||
| #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) | ||
| { | ||
| if (type == hwmon_temp) | ||
| return NFP_SENSOR_CHIP_TEMPERATURE; | ||
| if (type == hwmon_power) | ||
| return NFP_SENSOR_ASSEMBLY_POWER + channel; | ||
| return -EINVAL; | ||
| } | ||
|
|
||
| static int | ||
| nfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, | ||
| int channel, long *val) | ||
| { | ||
| static const struct { | ||
| enum hwmon_sensor_types type; | ||
| u32 attr; | ||
| long val; | ||
| } const_vals[] = { | ||
| { hwmon_temp, hwmon_temp_max, NFP_TEMP_MAX }, | ||
| { hwmon_temp, hwmon_temp_crit, NFP_TEMP_CRIT }, | ||
| { hwmon_power, hwmon_power_max, NFP_POWER_MAX }, | ||
| }; | ||
| struct nfp_pf *pf = dev_get_drvdata(dev); | ||
| enum nfp_nsp_sensor_id id; | ||
| int err, i; | ||
|
|
||
| for (i = 0; i < ARRAY_SIZE(const_vals); i++) | ||
| if (const_vals[i].type == type && const_vals[i].attr == attr) { | ||
| *val = const_vals[i].val; | ||
| return 0; | ||
| } | ||
|
|
||
| err = nfp_hwmon_sensor_id(type, channel); | ||
| if (err < 0) | ||
| return err; | ||
| id = err; | ||
|
|
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| if (!(pf->nspi->sensor_mask & BIT(id))) | ||
| return -EOPNOTSUPP; | ||
|
|
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| if (type == hwmon_temp && attr == hwmon_temp_input) | ||
| return nfp_hwmon_read_sensor(pf->cpp, id, val); | ||
| if (type == hwmon_power && attr == hwmon_power_input) | ||
| return nfp_hwmon_read_sensor(pf->cpp, id, val); | ||
|
|
||
| return -EINVAL; | ||
| } | ||
|
|
||
| static umode_t | ||
| nfp_hwmon_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, | ||
| int channel) | ||
| { | ||
| if (type == hwmon_temp) { | ||
| switch (attr) { | ||
| case hwmon_temp_input: | ||
| case hwmon_temp_crit: | ||
| case hwmon_temp_max: | ||
| return 0444; | ||
| } | ||
| } else if (type == hwmon_power) { | ||
| switch (attr) { | ||
| case hwmon_power_input: | ||
| case hwmon_power_max: | ||
| return 0444; | ||
| } | ||
| } | ||
| return 0; | ||
| } | ||
|
|
||
| static u32 nfp_chip_config[] = { | ||
| HWMON_C_REGISTER_TZ, | ||
| 0 | ||
| }; | ||
|
|
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| static const struct hwmon_channel_info nfp_chip = { | ||
| .type = hwmon_chip, | ||
| .config = nfp_chip_config, | ||
| }; | ||
|
|
||
| static u32 nfp_temp_config[] = { | ||
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT, | ||
| 0 | ||
| }; | ||
|
|
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| static const struct hwmon_channel_info nfp_temp = { | ||
| .type = hwmon_temp, | ||
| .config = nfp_temp_config, | ||
| }; | ||
|
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| static u32 nfp_power_config[] = { | ||
| HWMON_P_INPUT | HWMON_P_MAX, | ||
| HWMON_P_INPUT, | ||
| HWMON_P_INPUT, | ||
| 0 | ||
| }; | ||
|
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| static const struct hwmon_channel_info nfp_power = { | ||
| .type = hwmon_power, | ||
| .config = nfp_power_config, | ||
| }; | ||
|
|
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| static const struct hwmon_channel_info *nfp_hwmon_info[] = { | ||
| &nfp_chip, | ||
| &nfp_temp, | ||
| &nfp_power, | ||
| NULL | ||
| }; | ||
|
|
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| static const struct hwmon_ops nfp_hwmon_ops = { | ||
| .is_visible = nfp_hwmon_is_visible, | ||
| .read = nfp_hwmon_read, | ||
| }; | ||
|
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| static const struct hwmon_chip_info nfp_chip_info = { | ||
| .ops = &nfp_hwmon_ops, | ||
| .info = nfp_hwmon_info, | ||
| }; | ||
|
|
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| int nfp_hwmon_register(struct nfp_pf *pf) | ||
| { | ||
| if (!IS_REACHABLE(CONFIG_HWMON)) | ||
| return 0; | ||
|
|
||
| if (!pf->nspi) { | ||
| nfp_warn(pf->cpp, "not registering HWMON (no NSP info)\n"); | ||
| return 0; | ||
| } | ||
| if (!pf->nspi->sensor_mask) { | ||
| nfp_info(pf->cpp, | ||
| "not registering HWMON (NSP doesn't report sensors)\n"); | ||
| return 0; | ||
| } | ||
|
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| pf->hwmon_dev = hwmon_device_register_with_info(&pf->pdev->dev, "nfp", | ||
| pf, &nfp_chip_info, | ||
| NULL); | ||
| return PTR_ERR_OR_ZERO(pf->hwmon_dev); | ||
| } | ||
|
|
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| void nfp_hwmon_unregister(struct nfp_pf *pf) | ||
| { | ||
| if (!IS_REACHABLE(CONFIG_HWMON) || !pf->hwmon_dev) | ||
| return; | ||
|
|
||
| hwmon_device_unregister(pf->hwmon_dev); | ||
| } |
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