cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

cxgb4_thermal.c (2896B)

      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}