1 // SPDX-License-Identifier: LGPL-2.1+
2 // Copyright (C) 2022, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org>
3 #include <linux/netlink.h>
4 #include <stdio.h>
5 #include <stdlib.h>
6 #include <unistd.h>
7
8
9 #include <thermal.h>
10 #include "thermal_nl.h"
11
12 /*
13 * Optimization: fill this array to tell which event we do want to pay
14 * attention to. That happens at init time with the ops
15 * structure. Each ops will enable the event and the general handler
16 * will be able to discard the event if there is not ops associated
17 * with it.
18 */
19 static int enabled_ops[__THERMAL_GENL_EVENT_MAX];
20
21 static int handle_thermal_event(struct nl_msg *n, void *arg)
22 {
23 struct nlmsghdr *nlh = nlmsg_hdr(n);
24 struct genlmsghdr *genlhdr = genlmsg_hdr(nlh);
25 struct nlattr *attrs[THERMAL_GENL_ATTR_MAX + 1];
26 struct thermal_handler_param *thp = arg;
27 struct thermal_events_ops *ops = &thp->th->ops->events;
28
29 genlmsg_parse(nlh, 0, attrs, THERMAL_GENL_ATTR_MAX, NULL);
30
31 arg = thp->arg;
32
33 /*
34 * This is an event we don't care of, bail out.
35 */
36 if (!enabled_ops[genlhdr->cmd])
37 return THERMAL_SUCCESS;
38
39 switch (genlhdr->cmd) {
40
41 case THERMAL_GENL_EVENT_TZ_CREATE:
42 return ops->tz_create(nla_get_string(attrs[THERMAL_GENL_ATTR_TZ_NAME]),
43 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);
44
45 case THERMAL_GENL_EVENT_TZ_DELETE:
46 return ops->tz_delete(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);
47
48 case THERMAL_GENL_EVENT_TZ_ENABLE:
49 return ops->tz_enable(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);
50
51 case THERMAL_GENL_EVENT_TZ_DISABLE:
52 return ops->tz_disable(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), arg);
53
54 case THERMAL_GENL_EVENT_TZ_TRIP_CHANGE:
55 return ops->trip_change(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
56 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),
57 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TYPE]),
58 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TEMP]),
59 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_HYST]), arg);
60
61 case THERMAL_GENL_EVENT_TZ_TRIP_ADD:
62 return ops->trip_add(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
63 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),
64 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TYPE]),
65 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_TEMP]),
66 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_HYST]), arg);
67
68 case THERMAL_GENL_EVENT_TZ_TRIP_DELETE:
69 return ops->trip_delete(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
70 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]), arg);
71
72 case THERMAL_GENL_EVENT_TZ_TRIP_UP:
73 return ops->trip_high(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
74 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),
75 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TEMP]), arg);
76
77 case THERMAL_GENL_EVENT_TZ_TRIP_DOWN:
78 return ops->trip_low(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
79 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TRIP_ID]),
80 nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TEMP]), arg);
81
82 case THERMAL_GENL_EVENT_CDEV_ADD:
83 return ops->cdev_add(nla_get_string(attrs[THERMAL_GENL_ATTR_CDEV_NAME]),
84 nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]),
85 nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_MAX_STATE]), arg);
86
87 case THERMAL_GENL_EVENT_CDEV_DELETE:
88 return ops->cdev_delete(nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]), arg);
89
90 case THERMAL_GENL_EVENT_CDEV_STATE_UPDATE:
91 return ops->cdev_update(nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_ID]),
92 nla_get_u32(attrs[THERMAL_GENL_ATTR_CDEV_CUR_STATE]), arg);
93
94 case THERMAL_GENL_EVENT_TZ_GOV_CHANGE:
95 return ops->gov_change(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
96 nla_get_string(attrs[THERMAL_GENL_ATTR_GOV_NAME]), arg);
97 default:
98 return -1;
99 }
100 }
101
102 static void thermal_events_ops_init(struct thermal_events_ops *ops)
103 {
104 enabled_ops[THERMAL_GENL_EVENT_TZ_CREATE] = !!ops->tz_create;
105 enabled_ops[THERMAL_GENL_EVENT_TZ_DELETE] = !!ops->tz_delete;
106 enabled_ops[THERMAL_GENL_EVENT_TZ_DISABLE] = !!ops->tz_disable;
107 enabled_ops[THERMAL_GENL_EVENT_TZ_ENABLE] = !!ops->tz_enable;
108 enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_UP] = !!ops->trip_high;
109 enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_DOWN] = !!ops->trip_low;
110 enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_CHANGE] = !!ops->trip_change;
111 enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_ADD] = !!ops->trip_add;
112 enabled_ops[THERMAL_GENL_EVENT_TZ_TRIP_DELETE] = !!ops->trip_delete;
113 enabled_ops[THERMAL_GENL_EVENT_CDEV_ADD] = !!ops->cdev_add;
114 enabled_ops[THERMAL_GENL_EVENT_CDEV_DELETE] = !!ops->cdev_delete;
115 enabled_ops[THERMAL_GENL_EVENT_CDEV_STATE_UPDATE] = !!ops->cdev_update;
116 enabled_ops[THERMAL_GENL_EVENT_TZ_GOV_CHANGE] = !!ops->gov_change;
117 }
118
119 thermal_error_t thermal_events_handle(struct thermal_handler *th, void *arg)
120 {
121 struct thermal_handler_param thp = { .th = th, .arg = arg };
122
123 if (!th)
124 return THERMAL_ERROR;
125
126 if (nl_cb_set(th->cb_event, NL_CB_VALID, NL_CB_CUSTOM,
127 handle_thermal_event, &thp))
128 return THERMAL_ERROR;
129
130 return nl_recvmsgs(th->sk_event, th->cb_event);
131 }
132
133 int thermal_events_fd(struct thermal_handler *th)
134 {
135 if (!th)
136 return -1;
137
138 return nl_socket_get_fd(th->sk_event);
139 }
140
141 thermal_error_t thermal_events_exit(struct thermal_handler *th)
142 {
143 if (nl_unsubscribe_thermal(th->sk_event, th->cb_event,
144 THERMAL_GENL_EVENT_GROUP_NAME))
145 return THERMAL_ERROR;
146
147 nl_thermal_disconnect(th->sk_event, th->cb_event);
148
149 return THERMAL_SUCCESS;
150 }
151
152 thermal_error_t thermal_events_init(struct thermal_handler *th)
153 {
154 thermal_events_ops_init(&th->ops->events);
155
156 if (nl_thermal_connect(&th->sk_event, &th->cb_event))
157 return THERMAL_ERROR;
158
159 if (nl_subscribe_thermal(th->sk_event, th->cb_event,
160 THERMAL_GENL_EVENT_GROUP_NAME))
161 return THERMAL_ERROR;
162
163 return THERMAL_SUCCESS;
164 }
165
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