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Commit | Line | Data |
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0f0d8406 ML |
1 | /* |
2 | * drivers/base/sync.c | |
3 | * | |
4 | * Copyright (C) 2012 Google, Inc. | |
5 | * | |
6 | * This software is licensed under the terms of the GNU General Public | |
7 | * License version 2, as published by the Free Software Foundation, and | |
8 | * may be copied, distributed, and modified under those terms. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | */ | |
16 | ||
17 | #include <linux/debugfs.h> | |
d21858fd | 18 | #include "sync.h" |
0f0d8406 ML |
19 | |
20 | #ifdef CONFIG_DEBUG_FS | |
21 | ||
8a004484 GP |
22 | static struct dentry *dbgfs; |
23 | ||
0f0d8406 ML |
24 | static LIST_HEAD(sync_timeline_list_head); |
25 | static DEFINE_SPINLOCK(sync_timeline_list_lock); | |
d7fdb0ae GP |
26 | static LIST_HEAD(sync_file_list_head); |
27 | static DEFINE_SPINLOCK(sync_file_list_lock); | |
0f0d8406 ML |
28 | |
29 | void sync_timeline_debug_add(struct sync_timeline *obj) | |
30 | { | |
31 | unsigned long flags; | |
32 | ||
33 | spin_lock_irqsave(&sync_timeline_list_lock, flags); | |
34 | list_add_tail(&obj->sync_timeline_list, &sync_timeline_list_head); | |
35 | spin_unlock_irqrestore(&sync_timeline_list_lock, flags); | |
36 | } | |
37 | ||
38 | void sync_timeline_debug_remove(struct sync_timeline *obj) | |
39 | { | |
40 | unsigned long flags; | |
41 | ||
42 | spin_lock_irqsave(&sync_timeline_list_lock, flags); | |
43 | list_del(&obj->sync_timeline_list); | |
44 | spin_unlock_irqrestore(&sync_timeline_list_lock, flags); | |
45 | } | |
46 | ||
d7fdb0ae | 47 | void sync_file_debug_add(struct sync_file *sync_file) |
0f0d8406 ML |
48 | { |
49 | unsigned long flags; | |
50 | ||
d7fdb0ae GP |
51 | spin_lock_irqsave(&sync_file_list_lock, flags); |
52 | list_add_tail(&sync_file->sync_file_list, &sync_file_list_head); | |
53 | spin_unlock_irqrestore(&sync_file_list_lock, flags); | |
0f0d8406 ML |
54 | } |
55 | ||
d7fdb0ae | 56 | void sync_file_debug_remove(struct sync_file *sync_file) |
0f0d8406 ML |
57 | { |
58 | unsigned long flags; | |
59 | ||
d7fdb0ae GP |
60 | spin_lock_irqsave(&sync_file_list_lock, flags); |
61 | list_del(&sync_file->sync_file_list); | |
62 | spin_unlock_irqrestore(&sync_file_list_lock, flags); | |
0f0d8406 ML |
63 | } |
64 | ||
65 | static const char *sync_status_str(int status) | |
66 | { | |
67 | if (status == 0) | |
68 | return "signaled"; | |
95451355 PST |
69 | |
70 | if (status > 0) | |
0f0d8406 | 71 | return "active"; |
95451355 PST |
72 | |
73 | return "error"; | |
0f0d8406 ML |
74 | } |
75 | ||
b55b54b5 | 76 | static void sync_print_fence(struct seq_file *s, struct fence *fence, bool show) |
0f0d8406 ML |
77 | { |
78 | int status = 1; | |
b55b54b5 | 79 | struct sync_timeline *parent = fence_parent(fence); |
0f0d8406 | 80 | |
b55b54b5 GP |
81 | if (fence_is_signaled_locked(fence)) |
82 | status = fence->status; | |
0f0d8406 | 83 | |
b55b54b5 GP |
84 | seq_printf(s, " %s%sfence %s", |
85 | show ? parent->name : "", | |
86 | show ? "_" : "", | |
0f0d8406 ML |
87 | sync_status_str(status)); |
88 | ||
89 | if (status <= 0) { | |
0541cdf5 | 90 | struct timespec64 ts64 = |
b55b54b5 | 91 | ktime_to_timespec64(fence->timestamp); |
95451355 | 92 | |
353fdf17 | 93 | seq_printf(s, "@%lld.%09ld", (s64)ts64.tv_sec, ts64.tv_nsec); |
0f0d8406 ML |
94 | } |
95 | ||
724812d6 | 96 | if (fence->ops->timeline_value_str && |
b55b54b5 | 97 | fence->ops->fence_value_str) { |
0f0d8406 | 98 | char value[64]; |
73465f1c | 99 | bool success; |
95451355 | 100 | |
b55b54b5 | 101 | fence->ops->fence_value_str(fence, value, sizeof(value)); |
73465f1c ML |
102 | success = strlen(value); |
103 | ||
724812d6 | 104 | if (success) { |
73465f1c ML |
105 | seq_printf(s, ": %s", value); |
106 | ||
b55b54b5 GP |
107 | fence->ops->timeline_value_str(fence, value, |
108 | sizeof(value)); | |
73465f1c ML |
109 | |
110 | if (strlen(value)) | |
111 | seq_printf(s, " / %s", value); | |
0f0d8406 ML |
112 | } |
113 | } | |
114 | ||
115 | seq_puts(s, "\n"); | |
116 | } | |
117 | ||
118 | static void sync_print_obj(struct seq_file *s, struct sync_timeline *obj) | |
119 | { | |
120 | struct list_head *pos; | |
121 | unsigned long flags; | |
122 | ||
ef30afef | 123 | seq_printf(s, "%s %s: %d\n", obj->name, obj->drv_name, obj->value); |
0f0d8406 ML |
124 | |
125 | spin_lock_irqsave(&obj->child_list_lock, flags); | |
126 | list_for_each(pos, &obj->child_list_head) { | |
0431b906 GP |
127 | struct sync_pt *pt = |
128 | container_of(pos, struct sync_pt, child_list); | |
129 | sync_print_fence(s, &pt->base, false); | |
0f0d8406 ML |
130 | } |
131 | spin_unlock_irqrestore(&obj->child_list_lock, flags); | |
132 | } | |
133 | ||
d7fdb0ae GP |
134 | static void sync_print_sync_file(struct seq_file *s, |
135 | struct sync_file *sync_file) | |
b55b54b5 | 136 | { |
0f0d8406 ML |
137 | int i; |
138 | ||
d7fdb0ae GP |
139 | seq_printf(s, "[%p] %s: %s\n", sync_file, sync_file->name, |
140 | sync_status_str(atomic_read(&sync_file->status))); | |
0f0d8406 | 141 | |
d7fdb0ae | 142 | for (i = 0; i < sync_file->num_fences; ++i) |
b55b54b5 GP |
143 | sync_print_fence(s, sync_file->cbs[i].fence, true); |
144 | } | |
145 | ||
0f0d8406 ML |
146 | static int sync_debugfs_show(struct seq_file *s, void *unused) |
147 | { | |
148 | unsigned long flags; | |
149 | struct list_head *pos; | |
150 | ||
151 | seq_puts(s, "objs:\n--------------\n"); | |
152 | ||
153 | spin_lock_irqsave(&sync_timeline_list_lock, flags); | |
154 | list_for_each(pos, &sync_timeline_list_head) { | |
155 | struct sync_timeline *obj = | |
156 | container_of(pos, struct sync_timeline, | |
157 | sync_timeline_list); | |
158 | ||
159 | sync_print_obj(s, obj); | |
160 | seq_puts(s, "\n"); | |
161 | } | |
162 | spin_unlock_irqrestore(&sync_timeline_list_lock, flags); | |
163 | ||
164 | seq_puts(s, "fences:\n--------------\n"); | |
165 | ||
d7fdb0ae GP |
166 | spin_lock_irqsave(&sync_file_list_lock, flags); |
167 | list_for_each(pos, &sync_file_list_head) { | |
168 | struct sync_file *sync_file = | |
169 | container_of(pos, struct sync_file, sync_file_list); | |
0f0d8406 | 170 | |
d7fdb0ae | 171 | sync_print_sync_file(s, sync_file); |
0f0d8406 ML |
172 | seq_puts(s, "\n"); |
173 | } | |
d7fdb0ae | 174 | spin_unlock_irqrestore(&sync_file_list_lock, flags); |
0f0d8406 ML |
175 | return 0; |
176 | } | |
177 | ||
8a004484 | 178 | static int sync_info_debugfs_open(struct inode *inode, struct file *file) |
0f0d8406 ML |
179 | { |
180 | return single_open(file, sync_debugfs_show, inode->i_private); | |
181 | } | |
182 | ||
8a004484 GP |
183 | static const struct file_operations sync_info_debugfs_fops = { |
184 | .open = sync_info_debugfs_open, | |
0f0d8406 ML |
185 | .read = seq_read, |
186 | .llseek = seq_lseek, | |
187 | .release = single_release, | |
188 | }; | |
189 | ||
190 | static __init int sync_debugfs_init(void) | |
191 | { | |
8a004484 GP |
192 | dbgfs = debugfs_create_dir("sync", NULL); |
193 | ||
194 | debugfs_create_file("info", 0444, dbgfs, NULL, &sync_info_debugfs_fops); | |
d21858fd | 195 | |
a44eb74c GP |
196 | debugfs_create_file("sw_sync", 0644, dbgfs, NULL, |
197 | &sw_sync_debugfs_fops); | |
8a004484 | 198 | |
0f0d8406 ML |
199 | return 0; |
200 | } | |
201 | late_initcall(sync_debugfs_init); | |
202 | ||
203 | #define DUMP_CHUNK 256 | |
204 | static char sync_dump_buf[64 * 1024]; | |
205 | void sync_dump(void) | |
206 | { | |
207 | struct seq_file s = { | |
208 | .buf = sync_dump_buf, | |
209 | .size = sizeof(sync_dump_buf) - 1, | |
210 | }; | |
211 | int i; | |
212 | ||
213 | sync_debugfs_show(&s, NULL); | |
214 | ||
215 | for (i = 0; i < s.count; i += DUMP_CHUNK) { | |
216 | if ((s.count - i) > DUMP_CHUNK) { | |
217 | char c = s.buf[i + DUMP_CHUNK]; | |
95451355 | 218 | |
0f0d8406 ML |
219 | s.buf[i + DUMP_CHUNK] = 0; |
220 | pr_cont("%s", s.buf + i); | |
221 | s.buf[i + DUMP_CHUNK] = c; | |
222 | } else { | |
223 | s.buf[s.count] = 0; | |
224 | pr_cont("%s", s.buf + i); | |
225 | } | |
226 | } | |
227 | } | |
228 | ||
229 | #endif |