1 // SPDX-License-Identifier: LGPL-2.1+
2 // Copyright (C) 2022, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org>
3 #include <errno.h>
4 #include <stdio.h>
5 #include <stdlib.h>
6 #include <unistd.h>
7 
8 #include <thermal.h>
9 #include "thermal_nl.h"
10 
handle_thermal_sample(struct nl_msg * n,void * arg)11 static int handle_thermal_sample(struct nl_msg *n, void *arg)
12 {
13 	struct nlmsghdr *nlh = nlmsg_hdr(n);
14 	struct genlmsghdr *genlhdr = genlmsg_hdr(nlh);
15 	struct nlattr *attrs[THERMAL_GENL_ATTR_MAX + 1];
16 	struct thermal_handler_param *thp = arg;
17 	struct thermal_handler *th = thp->th;
18 
19 	genlmsg_parse(nlh, 0, attrs, THERMAL_GENL_ATTR_MAX, NULL);
20 
21 	switch (genlhdr->cmd) {
22 
23 	case THERMAL_GENL_SAMPLING_TEMP:
24 		return th->ops->sampling.tz_temp(
25 			nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
26 			nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TEMP]), arg);
27 	default:
28 		return THERMAL_ERROR;
29 	}
30 }
31 
thermal_sampling_handle(struct thermal_handler * th,void * arg)32 thermal_error_t thermal_sampling_handle(struct thermal_handler *th, void *arg)
33 {
34 	struct thermal_handler_param thp = { .th = th, .arg = arg };
35 
36 	if (!th)
37 		return THERMAL_ERROR;
38 
39 	if (nl_cb_set(th->cb_sampling, NL_CB_VALID, NL_CB_CUSTOM,
40 		      handle_thermal_sample, &thp))
41 		return THERMAL_ERROR;
42 
43 	return nl_recvmsgs(th->sk_sampling, th->cb_sampling);
44 }
45 
thermal_sampling_fd(struct thermal_handler * th)46 int thermal_sampling_fd(struct thermal_handler *th)
47 {
48 	if (!th)
49 		return -1;
50 
51 	return nl_socket_get_fd(th->sk_sampling);
52 }
53 
thermal_sampling_exit(struct thermal_handler * th)54 thermal_error_t thermal_sampling_exit(struct thermal_handler *th)
55 {
56 	if (nl_unsubscribe_thermal(th->sk_sampling, th->cb_sampling,
57 				   THERMAL_GENL_SAMPLING_GROUP_NAME))
58 		return THERMAL_ERROR;
59 
60 	nl_thermal_disconnect(th->sk_sampling, th->cb_sampling);
61 
62 	return THERMAL_SUCCESS;
63 }
64 
thermal_sampling_init(struct thermal_handler * th)65 thermal_error_t thermal_sampling_init(struct thermal_handler *th)
66 {
67 	if (nl_thermal_connect(&th->sk_sampling, &th->cb_sampling))
68 		return THERMAL_ERROR;
69 
70 	if (nl_subscribe_thermal(th->sk_sampling, th->cb_sampling,
71 				 THERMAL_GENL_SAMPLING_GROUP_NAME))
72 		return THERMAL_ERROR;
73 
74 	return THERMAL_SUCCESS;
75 }
76