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
cxgb4_thermal_get_temp(struct thermal_zone_device * tzdev,int * temp)12 static 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 ¶m, &val);
25 if (ret < 0 || val == 0)
26 return -1;
27
28 *temp = val * 1000;
29 return 0;
30 }
31
cxgb4_thermal_get_trip_type(struct thermal_zone_device * tzdev,int trip,enum thermal_trip_type * type)32 static 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
cxgb4_thermal_get_trip_temp(struct thermal_zone_device * tzdev,int trip,int * temp)44 static 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
56 static 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
cxgb4_thermal_init(struct adapter * adap)62 int 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 ¶m, &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
cxgb4_thermal_remove(struct adapter * adap)108 int 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