Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 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> |
Gustavo Padovan | 1fe82e2 | 2016-05-31 16:59:12 -0300 | [diff] [blame^] | 18 | #include "sync_debug.h" |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 19 | |
| 20 | #ifdef CONFIG_DEBUG_FS |
| 21 | |
Gustavo Padovan | 8a00448 | 2016-01-21 10:49:17 -0200 | [diff] [blame] | 22 | static struct dentry *dbgfs; |
| 23 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 24 | static LIST_HEAD(sync_timeline_list_head); |
| 25 | static DEFINE_SPINLOCK(sync_timeline_list_lock); |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 26 | static LIST_HEAD(sync_file_list_head); |
| 27 | static DEFINE_SPINLOCK(sync_file_list_lock); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 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 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 47 | void sync_file_debug_add(struct sync_file *sync_file) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 48 | { |
| 49 | unsigned long flags; |
| 50 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 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); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 54 | } |
| 55 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 56 | void sync_file_debug_remove(struct sync_file *sync_file) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 57 | { |
| 58 | unsigned long flags; |
| 59 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 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); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | static const char *sync_status_str(int status) |
| 66 | { |
| 67 | if (status == 0) |
| 68 | return "signaled"; |
Peter Senna Tschudin | 9545135 | 2014-07-12 21:55:56 +0200 | [diff] [blame] | 69 | |
| 70 | if (status > 0) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 71 | return "active"; |
Peter Senna Tschudin | 9545135 | 2014-07-12 21:55:56 +0200 | [diff] [blame] | 72 | |
| 73 | return "error"; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 74 | } |
| 75 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 76 | static void sync_print_fence(struct seq_file *s, struct fence *fence, bool show) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 77 | { |
| 78 | int status = 1; |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 79 | struct sync_timeline *parent = fence_parent(fence); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 80 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 81 | if (fence_is_signaled_locked(fence)) |
| 82 | status = fence->status; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 83 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 84 | seq_printf(s, " %s%sfence %s", |
| 85 | show ? parent->name : "", |
| 86 | show ? "_" : "", |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 87 | sync_status_str(status)); |
| 88 | |
| 89 | if (status <= 0) { |
Steve Pennington | 0541cdf | 2014-12-24 09:33:02 -0600 | [diff] [blame] | 90 | struct timespec64 ts64 = |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 91 | ktime_to_timespec64(fence->timestamp); |
Peter Senna Tschudin | 9545135 | 2014-07-12 21:55:56 +0200 | [diff] [blame] | 92 | |
Tapasweni Pathak | 353fdf1 | 2014-10-26 19:20:16 +0530 | [diff] [blame] | 93 | seq_printf(s, "@%lld.%09ld", (s64)ts64.tv_sec, ts64.tv_nsec); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 94 | } |
| 95 | |
Gustavo Padovan | 724812d | 2016-05-31 16:59:02 -0300 | [diff] [blame] | 96 | if (fence->ops->timeline_value_str && |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 97 | fence->ops->fence_value_str) { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 98 | char value[64]; |
Maarten Lankhorst | 73465f1 | 2015-12-11 13:11:49 +0000 | [diff] [blame] | 99 | bool success; |
Peter Senna Tschudin | 9545135 | 2014-07-12 21:55:56 +0200 | [diff] [blame] | 100 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 101 | fence->ops->fence_value_str(fence, value, sizeof(value)); |
Maarten Lankhorst | 73465f1 | 2015-12-11 13:11:49 +0000 | [diff] [blame] | 102 | success = strlen(value); |
| 103 | |
Gustavo Padovan | 724812d | 2016-05-31 16:59:02 -0300 | [diff] [blame] | 104 | if (success) { |
Maarten Lankhorst | 73465f1 | 2015-12-11 13:11:49 +0000 | [diff] [blame] | 105 | seq_printf(s, ": %s", value); |
| 106 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 107 | fence->ops->timeline_value_str(fence, value, |
| 108 | sizeof(value)); |
Maarten Lankhorst | 73465f1 | 2015-12-11 13:11:49 +0000 | [diff] [blame] | 109 | |
| 110 | if (strlen(value)) |
| 111 | seq_printf(s, " / %s", value); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 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 | |
Gustavo Padovan | b9bc2b7 | 2016-05-31 16:59:11 -0300 | [diff] [blame] | 123 | seq_printf(s, "%s: %d\n", obj->name, obj->value); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 124 | |
| 125 | spin_lock_irqsave(&obj->child_list_lock, flags); |
| 126 | list_for_each(pos, &obj->child_list_head) { |
Gustavo Padovan | 0431b90 | 2016-05-31 16:59:04 -0300 | [diff] [blame] | 127 | struct sync_pt *pt = |
| 128 | container_of(pos, struct sync_pt, child_list); |
| 129 | sync_print_fence(s, &pt->base, false); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 130 | } |
| 131 | spin_unlock_irqrestore(&obj->child_list_lock, flags); |
| 132 | } |
| 133 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 134 | static void sync_print_sync_file(struct seq_file *s, |
| 135 | struct sync_file *sync_file) |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 136 | { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 137 | int i; |
| 138 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 139 | seq_printf(s, "[%p] %s: %s\n", sync_file, sync_file->name, |
| 140 | sync_status_str(atomic_read(&sync_file->status))); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 141 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 142 | for (i = 0; i < sync_file->num_fences; ++i) |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 143 | sync_print_fence(s, sync_file->cbs[i].fence, true); |
| 144 | } |
| 145 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 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 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 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); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 170 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 171 | sync_print_sync_file(s, sync_file); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 172 | seq_puts(s, "\n"); |
| 173 | } |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 174 | spin_unlock_irqrestore(&sync_file_list_lock, flags); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 175 | return 0; |
| 176 | } |
| 177 | |
Gustavo Padovan | 8a00448 | 2016-01-21 10:49:17 -0200 | [diff] [blame] | 178 | static int sync_info_debugfs_open(struct inode *inode, struct file *file) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 179 | { |
| 180 | return single_open(file, sync_debugfs_show, inode->i_private); |
| 181 | } |
| 182 | |
Gustavo Padovan | 8a00448 | 2016-01-21 10:49:17 -0200 | [diff] [blame] | 183 | static const struct file_operations sync_info_debugfs_fops = { |
| 184 | .open = sync_info_debugfs_open, |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 185 | .read = seq_read, |
| 186 | .llseek = seq_lseek, |
| 187 | .release = single_release, |
| 188 | }; |
| 189 | |
| 190 | static __init int sync_debugfs_init(void) |
| 191 | { |
Gustavo Padovan | 8a00448 | 2016-01-21 10:49:17 -0200 | [diff] [blame] | 192 | dbgfs = debugfs_create_dir("sync", NULL); |
| 193 | |
| 194 | debugfs_create_file("info", 0444, dbgfs, NULL, &sync_info_debugfs_fops); |
Gustavo Padovan | d21858f | 2016-05-31 16:59:00 -0300 | [diff] [blame] | 195 | |
Gustavo Padovan | a44eb74 | 2016-01-21 10:49:18 -0200 | [diff] [blame] | 196 | debugfs_create_file("sw_sync", 0644, dbgfs, NULL, |
| 197 | &sw_sync_debugfs_fops); |
Gustavo Padovan | 8a00448 | 2016-01-21 10:49:17 -0200 | [diff] [blame] | 198 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 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]; |
Peter Senna Tschudin | 9545135 | 2014-07-12 21:55:56 +0200 | [diff] [blame] | 218 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 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 |