LXR linux/drivers/net/ethernet/chelsio/cxgb4/cxgb4

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 *  Copyright (C) 2017 Chelsio Communications.  All rights reserved.
   4 *
   5 *  Written by: Ganesh Goudar (ganeshgr@chelsio.com)
   6 */
   7
   8#include "cxgb4.h"
   9
  10#define CXGB4_NUM_TRIPS 1
  11
  12static int cxgb4_thermal_get_temp(struct thermal_zone_device *tzdev,
  13                                  int *temp)
  14{
  15        struct adapter *adap = tzdev->devdata;
  16        u32 param, val;
  17        int ret;
  18
  19        param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
  20                 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
  21                 FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_TMP));
  22
  23        ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
  24                              &param, &val);
  25        if (ret < 0 || val == 0)
  26                return -1;
  27
  28        *temp = val * 1000;
  29        return 0;
  30}
  31
  32static int cxgb4_thermal_get_trip_type(struct thermal_zone_device *tzdev,
  33                                       int trip, enum thermal_trip_type *type)
  34{
  35        struct adapter *adap = tzdev->devdata;
  36
  37        if (!adap->ch_thermal.trip_temp)
  38                return -EINVAL;
  39
  40        *type = adap->ch_thermal.trip_type;
  41        return 0;
  42}
  43
  44static int cxgb4_thermal_get_trip_temp(struct thermal_zone_device *tzdev,
  45                                       int trip, int *temp)
  46{
  47        struct adapter *adap = tzdev->devdata;
  48
  49        if (!adap->ch_thermal.trip_temp)
  50                return -EINVAL;
  51
  52        *temp = adap->ch_thermal.trip_temp;
  53        return 0;
  54}
  55
  56static struct thermal_zone_device_ops cxgb4_thermal_ops = {
  57        .get_temp = cxgb4_thermal_get_temp,
  58        .get_trip_type = cxgb4_thermal_get_trip_type,
  59        .get_trip_temp = cxgb4_thermal_get_trip_temp,
  60};
  61
  62int cxgb4_thermal_init(struct adapter *adap)
  63{
  64        struct ch_thermal *ch_thermal = &adap->ch_thermal;
  65        char ch_tz_name[THERMAL_NAME_LENGTH];
  66        int num_trip = CXGB4_NUM_TRIPS;
  67        u32 param, val;
  68        int ret;
  69
  70        /* on older firmwares we may not get the trip temperature,
  71         * set the num of trips to 0.
  72         */
  73        param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
  74                 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
  75                 FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_MAXTMPTHRESH));
  76
  77        ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
  78                              &param, &val);
  79        if (ret < 0) {
  80                num_trip = 0; /* could not get trip temperature */
  81        } else {
  82                ch_thermal->trip_temp = val * 1000;
  83                ch_thermal->trip_type = THERMAL_TRIP_CRITICAL;
  84        }
  85
  86        snprintf(ch_tz_name, sizeof(ch_tz_name), "cxgb4_%s", adap->name);
  87        ch_thermal->tzdev = thermal_zone_device_register(ch_tz_name, num_trip,
  88                                                         0, adap,
  89                                                         &cxgb4_thermal_ops,
  90                                                         NULL, 0, 0);
  91        if (IS_ERR(ch_thermal->tzdev)) {
  92                ret = PTR_ERR(ch_thermal->tzdev);
  93                dev_err(adap->pdev_dev, "Failed to register thermal zone\n");
  94                ch_thermal->tzdev = NULL;
  95                return ret;
  96        }
  97
  98        ret = thermal_zone_device_enable(ch_thermal->tzdev);
  99        if (ret) {
 100                dev_err(adap->pdev_dev, "Failed to enable thermal zone\n");
 101                thermal_zone_device_unregister(adap->ch_thermal.tzdev);
 102                return ret;
 103        }
 104
 105        return 0;
 106}
 107
 108int cxgb4_thermal_remove(struct adapter *adap)
 109{
 110        if (adap->ch_thermal.tzdev) {
 111                thermal_zone_device_unregister(adap->ch_thermal.tzdev);
 112                adap->ch_thermal.tzdev = NULL;
 113        }
 114        return 0;
 115}
 116