Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 1 | /* |
Gustavo Padovan | e912c88 | 2016-08-11 12:26:42 -0300 | [diff] [blame] | 2 | * Sync File validation framework and debug information |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 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 | |
Gustavo Padovan | 8a00448 | 2016-01-21 10:49:17 -0200 | [diff] [blame] | 20 | static struct dentry *dbgfs; |
| 21 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 22 | static LIST_HEAD(sync_timeline_list_head); |
| 23 | static DEFINE_SPINLOCK(sync_timeline_list_lock); |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 24 | static LIST_HEAD(sync_file_list_head); |
| 25 | static DEFINE_SPINLOCK(sync_file_list_lock); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 26 | |
| 27 | void sync_timeline_debug_add(struct sync_timeline *obj) |
| 28 | { |
| 29 | unsigned long flags; |
| 30 | |
| 31 | spin_lock_irqsave(&sync_timeline_list_lock, flags); |
| 32 | list_add_tail(&obj->sync_timeline_list, &sync_timeline_list_head); |
| 33 | spin_unlock_irqrestore(&sync_timeline_list_lock, flags); |
| 34 | } |
| 35 | |
| 36 | void sync_timeline_debug_remove(struct sync_timeline *obj) |
| 37 | { |
| 38 | unsigned long flags; |
| 39 | |
| 40 | spin_lock_irqsave(&sync_timeline_list_lock, flags); |
| 41 | list_del(&obj->sync_timeline_list); |
| 42 | spin_unlock_irqrestore(&sync_timeline_list_lock, flags); |
| 43 | } |
| 44 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 45 | void sync_file_debug_add(struct sync_file *sync_file) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 46 | { |
| 47 | unsigned long flags; |
| 48 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 49 | spin_lock_irqsave(&sync_file_list_lock, flags); |
| 50 | list_add_tail(&sync_file->sync_file_list, &sync_file_list_head); |
| 51 | spin_unlock_irqrestore(&sync_file_list_lock, flags); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 52 | } |
| 53 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 54 | void sync_file_debug_remove(struct sync_file *sync_file) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 55 | { |
| 56 | unsigned long flags; |
| 57 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 58 | spin_lock_irqsave(&sync_file_list_lock, flags); |
| 59 | list_del(&sync_file->sync_file_list); |
| 60 | spin_unlock_irqrestore(&sync_file_list_lock, flags); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | static const char *sync_status_str(int status) |
| 64 | { |
| 65 | if (status == 0) |
| 66 | return "signaled"; |
Peter Senna Tschudin | 9545135 | 2014-07-12 21:55:56 +0200 | [diff] [blame] | 67 | |
| 68 | if (status > 0) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 69 | return "active"; |
Peter Senna Tschudin | 9545135 | 2014-07-12 21:55:56 +0200 | [diff] [blame] | 70 | |
| 71 | return "error"; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 72 | } |
| 73 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 74 | 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] | 75 | { |
| 76 | int status = 1; |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 77 | struct sync_timeline *parent = fence_parent(fence); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 78 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 79 | if (fence_is_signaled_locked(fence)) |
| 80 | status = fence->status; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 81 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 82 | seq_printf(s, " %s%sfence %s", |
| 83 | show ? parent->name : "", |
| 84 | show ? "_" : "", |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 85 | sync_status_str(status)); |
| 86 | |
| 87 | if (status <= 0) { |
Steve Pennington | 0541cdf | 2014-12-24 09:33:02 -0600 | [diff] [blame] | 88 | struct timespec64 ts64 = |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 89 | ktime_to_timespec64(fence->timestamp); |
Peter Senna Tschudin | 9545135 | 2014-07-12 21:55:56 +0200 | [diff] [blame] | 90 | |
Tapasweni Pathak | 353fdf1 | 2014-10-26 19:20:16 +0530 | [diff] [blame] | 91 | seq_printf(s, "@%lld.%09ld", (s64)ts64.tv_sec, ts64.tv_nsec); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 92 | } |
| 93 | |
Gustavo Padovan | 724812d | 2016-05-31 16:59:02 -0300 | [diff] [blame] | 94 | if (fence->ops->timeline_value_str && |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 95 | fence->ops->fence_value_str) { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 96 | char value[64]; |
Maarten Lankhorst | 73465f1 | 2015-12-11 13:11:49 +0000 | [diff] [blame] | 97 | bool success; |
Peter Senna Tschudin | 9545135 | 2014-07-12 21:55:56 +0200 | [diff] [blame] | 98 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 99 | fence->ops->fence_value_str(fence, value, sizeof(value)); |
Maarten Lankhorst | 73465f1 | 2015-12-11 13:11:49 +0000 | [diff] [blame] | 100 | success = strlen(value); |
| 101 | |
Gustavo Padovan | 724812d | 2016-05-31 16:59:02 -0300 | [diff] [blame] | 102 | if (success) { |
Maarten Lankhorst | 73465f1 | 2015-12-11 13:11:49 +0000 | [diff] [blame] | 103 | seq_printf(s, ": %s", value); |
| 104 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 105 | fence->ops->timeline_value_str(fence, value, |
| 106 | sizeof(value)); |
Maarten Lankhorst | 73465f1 | 2015-12-11 13:11:49 +0000 | [diff] [blame] | 107 | |
| 108 | if (strlen(value)) |
| 109 | seq_printf(s, " / %s", value); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 110 | } |
| 111 | } |
| 112 | |
| 113 | seq_puts(s, "\n"); |
| 114 | } |
| 115 | |
| 116 | static void sync_print_obj(struct seq_file *s, struct sync_timeline *obj) |
| 117 | { |
| 118 | struct list_head *pos; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 119 | |
Gustavo Padovan | b9bc2b7 | 2016-05-31 16:59:11 -0300 | [diff] [blame] | 120 | seq_printf(s, "%s: %d\n", obj->name, obj->value); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 121 | |
Chris Wilson | f14ad42 | 2017-06-29 13:59:27 +0100 | [diff] [blame^] | 122 | spin_lock_irq(&obj->child_list_lock); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 123 | list_for_each(pos, &obj->child_list_head) { |
Gustavo Padovan | 0431b90 | 2016-05-31 16:59:04 -0300 | [diff] [blame] | 124 | struct sync_pt *pt = |
| 125 | container_of(pos, struct sync_pt, child_list); |
| 126 | sync_print_fence(s, &pt->base, false); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 127 | } |
Chris Wilson | f14ad42 | 2017-06-29 13:59:27 +0100 | [diff] [blame^] | 128 | spin_unlock_irq(&obj->child_list_lock); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 129 | } |
| 130 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 131 | static void sync_print_sync_file(struct seq_file *s, |
| 132 | struct sync_file *sync_file) |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 133 | { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 134 | int i; |
| 135 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 136 | seq_printf(s, "[%p] %s: %s\n", sync_file, sync_file->name, |
Linus Torvalds | 6b25e21 | 2016-10-11 18:12:22 -0700 | [diff] [blame] | 137 | sync_status_str(!fence_is_signaled(sync_file->fence))); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 138 | |
Linus Torvalds | 6b25e21 | 2016-10-11 18:12:22 -0700 | [diff] [blame] | 139 | if (fence_is_array(sync_file->fence)) { |
| 140 | struct fence_array *array = to_fence_array(sync_file->fence); |
| 141 | |
| 142 | for (i = 0; i < array->num_fences; ++i) |
| 143 | sync_print_fence(s, array->fences[i], true); |
| 144 | } else { |
| 145 | sync_print_fence(s, sync_file->fence, true); |
| 146 | } |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame] | 147 | } |
| 148 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 149 | static int sync_debugfs_show(struct seq_file *s, void *unused) |
| 150 | { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 151 | struct list_head *pos; |
| 152 | |
| 153 | seq_puts(s, "objs:\n--------------\n"); |
| 154 | |
Chris Wilson | f14ad42 | 2017-06-29 13:59:27 +0100 | [diff] [blame^] | 155 | spin_lock_irq(&sync_timeline_list_lock); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 156 | list_for_each(pos, &sync_timeline_list_head) { |
| 157 | struct sync_timeline *obj = |
| 158 | container_of(pos, struct sync_timeline, |
| 159 | sync_timeline_list); |
| 160 | |
| 161 | sync_print_obj(s, obj); |
| 162 | seq_puts(s, "\n"); |
| 163 | } |
Chris Wilson | f14ad42 | 2017-06-29 13:59:27 +0100 | [diff] [blame^] | 164 | spin_unlock_irq(&sync_timeline_list_lock); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 165 | |
| 166 | seq_puts(s, "fences:\n--------------\n"); |
| 167 | |
Chris Wilson | f14ad42 | 2017-06-29 13:59:27 +0100 | [diff] [blame^] | 168 | spin_lock_irq(&sync_file_list_lock); |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 169 | list_for_each(pos, &sync_file_list_head) { |
| 170 | struct sync_file *sync_file = |
| 171 | container_of(pos, struct sync_file, sync_file_list); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 172 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 173 | sync_print_sync_file(s, sync_file); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 174 | seq_puts(s, "\n"); |
| 175 | } |
Chris Wilson | f14ad42 | 2017-06-29 13:59:27 +0100 | [diff] [blame^] | 176 | spin_unlock_irq(&sync_file_list_lock); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 177 | return 0; |
| 178 | } |
| 179 | |
Gustavo Padovan | 8a00448 | 2016-01-21 10:49:17 -0200 | [diff] [blame] | 180 | static int sync_info_debugfs_open(struct inode *inode, struct file *file) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 181 | { |
| 182 | return single_open(file, sync_debugfs_show, inode->i_private); |
| 183 | } |
| 184 | |
Gustavo Padovan | 8a00448 | 2016-01-21 10:49:17 -0200 | [diff] [blame] | 185 | static const struct file_operations sync_info_debugfs_fops = { |
| 186 | .open = sync_info_debugfs_open, |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 187 | .read = seq_read, |
| 188 | .llseek = seq_lseek, |
| 189 | .release = single_release, |
| 190 | }; |
| 191 | |
| 192 | static __init int sync_debugfs_init(void) |
| 193 | { |
Gustavo Padovan | 8a00448 | 2016-01-21 10:49:17 -0200 | [diff] [blame] | 194 | dbgfs = debugfs_create_dir("sync", NULL); |
| 195 | |
Nicolai Stange | 0fd9da9 | 2016-05-27 20:03:54 +0200 | [diff] [blame] | 196 | /* |
| 197 | * The debugfs files won't ever get removed and thus, there is |
| 198 | * no need to protect it against removal races. The use of |
| 199 | * debugfs_create_file_unsafe() is actually safe here. |
| 200 | */ |
| 201 | debugfs_create_file_unsafe("info", 0444, dbgfs, NULL, |
| 202 | &sync_info_debugfs_fops); |
| 203 | debugfs_create_file_unsafe("sw_sync", 0644, dbgfs, NULL, |
| 204 | &sw_sync_debugfs_fops); |
Gustavo Padovan | 8a00448 | 2016-01-21 10:49:17 -0200 | [diff] [blame] | 205 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 206 | return 0; |
| 207 | } |
| 208 | late_initcall(sync_debugfs_init); |
| 209 | |
| 210 | #define DUMP_CHUNK 256 |
| 211 | static char sync_dump_buf[64 * 1024]; |
| 212 | void sync_dump(void) |
| 213 | { |
| 214 | struct seq_file s = { |
| 215 | .buf = sync_dump_buf, |
| 216 | .size = sizeof(sync_dump_buf) - 1, |
| 217 | }; |
| 218 | int i; |
| 219 | |
| 220 | sync_debugfs_show(&s, NULL); |
| 221 | |
| 222 | for (i = 0; i < s.count; i += DUMP_CHUNK) { |
| 223 | if ((s.count - i) > DUMP_CHUNK) { |
| 224 | char c = s.buf[i + DUMP_CHUNK]; |
Peter Senna Tschudin | 9545135 | 2014-07-12 21:55:56 +0200 | [diff] [blame] | 225 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 226 | s.buf[i + DUMP_CHUNK] = 0; |
| 227 | pr_cont("%s", s.buf + i); |
| 228 | s.buf[i + DUMP_CHUNK] = c; |
| 229 | } else { |
| 230 | s.buf[s.count] = 0; |
| 231 | pr_cont("%s", s.buf + i); |
| 232 | } |
| 233 | } |
| 234 | } |