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