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 = thermal_zone_device_priv(tzdev);
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 struct thermal_zone_device_ops cxgb4_thermal_ops = {
33	.get_temp = cxgb4_thermal_get_temp,
34};
35
36static struct thermal_trip trip = { .type = THERMAL_TRIP_CRITICAL } ;
37
38int cxgb4_thermal_init(struct adapter *adap)
39{
40	struct ch_thermal *ch_thermal = &adap->ch_thermal;
41	char ch_tz_name[THERMAL_NAME_LENGTH];
42	int num_trip = CXGB4_NUM_TRIPS;
43	u32 param, val;
44	int ret;
45
46	/* on older firmwares we may not get the trip temperature,
47	 * set the num of trips to 0.
48	 */
49	param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
50		 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
51		 FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_MAXTMPTHRESH));
52
53	ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
54			      &param, &val);
55	if (ret < 0) {
56		num_trip = 0; /* could not get trip temperature */
57	} else {
58		trip.temperature = val * 1000;
59	}
60
61	snprintf(ch_tz_name, sizeof(ch_tz_name), "cxgb4_%s", adap->name);
62	ch_thermal->tzdev = thermal_zone_device_register_with_trips(ch_tz_name, &trip, num_trip,
63								    adap,
64								    &cxgb4_thermal_ops,
65								    NULL, 0, 0);
66	if (IS_ERR(ch_thermal->tzdev)) {
67		ret = PTR_ERR(ch_thermal->tzdev);
68		dev_err(adap->pdev_dev, "Failed to register thermal zone\n");
69		ch_thermal->tzdev = NULL;
70		return ret;
71	}
72
73	ret = thermal_zone_device_enable(ch_thermal->tzdev);
74	if (ret) {
75		dev_err(adap->pdev_dev, "Failed to enable thermal zone\n");
76		thermal_zone_device_unregister(adap->ch_thermal.tzdev);
77		return ret;
78	}
79
80	return 0;
81}
82
83int cxgb4_thermal_remove(struct adapter *adap)
84{
85	if (adap->ch_thermal.tzdev) {
86		thermal_zone_device_unregister(adap->ch_thermal.tzdev);
87		adap->ch_thermal.tzdev = NULL;
88	}
89	return 0;
90}
91