1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Events provide a general-purpose way to react to / subscribe to changes
* within U-Boot
*
* Copyright 2021 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#define LOG_CATEGORY LOGC_EVENT
#include <common.h>
#include <event.h>
#include <event_internal.h>
#include <log.h>
#include <linker_lists.h>
#include <malloc.h>
#include <asm/global_data.h>
#include <linux/list.h>
DECLARE_GLOBAL_DATA_PTR;
#if CONFIG_IS_ENABLED(EVENT_DEBUG)
const char *const type_name[] = {
"none",
"test",
/* Events related to driver model */
"dm_post_init",
"dm_pre_probe",
"dm_post_probe",
"dm_pre_remove",
"dm_post_remove",
/* init hooks */
"misc_init_f",
};
_Static_assert(ARRAY_SIZE(type_name) == EVT_COUNT, "event type_name size");
#endif
static const char *event_type_name(enum event_t type)
{
#if CONFIG_IS_ENABLED(EVENT_DEBUG)
return type_name[type];
#else
return "(unknown)";
#endif
}
static int notify_static(struct event *ev)
{
struct evspy_info *start =
ll_entry_start(struct evspy_info, evspy_info);
const int n_ents = ll_entry_count(struct evspy_info, evspy_info);
struct evspy_info *spy;
for (spy = start; spy != start + n_ents; spy++) {
if (spy->type == ev->type) {
int ret;
log_debug("Sending event %x/%s to spy '%s'\n", ev->type,
event_type_name(ev->type), event_spy_id(spy));
ret = spy->func(NULL, ev);
/*
* TODO: Handle various return codes to
*
* - claim an event (no others will see it)
* - return an error from the event
*/
if (ret)
return log_msg_ret("spy", ret);
}
}
return 0;
}
static int notify_dynamic(struct event *ev)
{
struct event_state *state = gd_event_state();
struct event_spy *spy, *next;
list_for_each_entry_safe(spy, next, &state->spy_head, sibling_node) {
if (spy->type == ev->type) {
int ret;
log_debug("Sending event %x/%s to spy '%s'\n", ev->type,
event_type_name(ev->type), spy->id);
ret = spy->func(spy->ctx, ev);
/*
* TODO: Handle various return codes to
*
* - claim an event (no others will see it)
* - return an error from the event
*/
if (ret)
return log_msg_ret("spy", ret);
}
}
return 0;
}
int event_notify(enum event_t type, void *data, int size)
{
struct event event;
int ret;
event.type = type;
if (size > sizeof(event.data))
return log_msg_ret("size", -E2BIG);
memcpy(&event.data, data, size);
ret = notify_static(&event);
if (ret)
return log_msg_ret("dyn", ret);
if (CONFIG_IS_ENABLED(EVENT_DYNAMIC)) {
ret = notify_dynamic(&event);
if (ret)
return log_msg_ret("dyn", ret);
}
return 0;
}
int event_notify_null(enum event_t type)
{
return event_notify(type, NULL, 0);
}
void event_show_spy_list(void)
{
struct evspy_info *start =
ll_entry_start(struct evspy_info, evspy_info);
const int n_ents = ll_entry_count(struct evspy_info, evspy_info);
struct evspy_info *spy;
const int size = sizeof(ulong) * 2;
printf("Seq %-24s %*s %s\n", "Type", size, "Function", "ID");
for (spy = start; spy != start + n_ents; spy++) {
printf("%3x %-3x %-20s %*p %s\n", (uint)(spy - start),
spy->type, event_type_name(spy->type), size, spy->func,
event_spy_id(spy));
}
}
#if CONFIG_IS_ENABLED(EVENT_DYNAMIC)
static void spy_free(struct event_spy *spy)
{
list_del(&spy->sibling_node);
}
int event_register(const char *id, enum event_t type, event_handler_t func, void *ctx)
{
struct event_state *state = gd_event_state();
struct event_spy *spy;
if (!CONFIG_IS_ENABLED(EVENT_DYNAMIC))
return -ENOSYS;
spy = malloc(sizeof(*spy));
if (!spy)
return log_msg_ret("alloc", -ENOMEM);
spy->id = id;
spy->type = type;
spy->func = func;
spy->ctx = ctx;
list_add_tail(&spy->sibling_node, &state->spy_head);
return 0;
}
int event_uninit(void)
{
struct event_state *state = gd_event_state();
struct event_spy *spy, *next;
list_for_each_entry_safe(spy, next, &state->spy_head, sibling_node)
spy_free(spy);
return 0;
}
int event_init(void)
{
struct event_state *state = gd_event_state();
INIT_LIST_HEAD(&state->spy_head);
return 0;
}
#endif /* EVENT_DYNAMIC */
|
