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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 | // SPDX-License-Identifier: GPL-2.0-only /* * Sync File validation framework and debug information * * Copyright (C) 2012 Google, Inc. */ #include <linux/debugfs.h> #include "sync_debug.h" static struct dentry *dbgfs; static LIST_HEAD(sync_timeline_list_head); static DEFINE_SPINLOCK(sync_timeline_list_lock); static LIST_HEAD(sync_file_list_head); static DEFINE_SPINLOCK(sync_file_list_lock); void sync_timeline_debug_add(struct sync_timeline *obj) { unsigned long flags; spin_lock_irqsave(&sync_timeline_list_lock, flags); list_add_tail(&obj->sync_timeline_list, &sync_timeline_list_head); spin_unlock_irqrestore(&sync_timeline_list_lock, flags); } void sync_timeline_debug_remove(struct sync_timeline *obj) { unsigned long flags; spin_lock_irqsave(&sync_timeline_list_lock, flags); list_del(&obj->sync_timeline_list); spin_unlock_irqrestore(&sync_timeline_list_lock, flags); } void sync_file_debug_add(struct sync_file *sync_file) { unsigned long flags; spin_lock_irqsave(&sync_file_list_lock, flags); list_add_tail(&sync_file->sync_file_list, &sync_file_list_head); spin_unlock_irqrestore(&sync_file_list_lock, flags); } void sync_file_debug_remove(struct sync_file *sync_file) { unsigned long flags; spin_lock_irqsave(&sync_file_list_lock, flags); list_del(&sync_file->sync_file_list); spin_unlock_irqrestore(&sync_file_list_lock, flags); } static const char *sync_status_str(int status) { if (status < 0) return "error"; if (status > 0) return "signaled"; return "active"; } static void sync_print_fence(struct seq_file *s, struct dma_fence *fence, bool show) { struct sync_timeline *parent = dma_fence_parent(fence); int status; status = dma_fence_get_status_locked(fence); seq_printf(s, " %s%sfence %s", show ? parent->name : "", show ? "_" : "", sync_status_str(status)); if (test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags)) { struct timespec64 ts64 = ktime_to_timespec64(fence->timestamp); seq_printf(s, "@%lld.%09ld", (s64)ts64.tv_sec, ts64.tv_nsec); } if (fence->ops->timeline_value_str && fence->ops->fence_value_str) { char value[64]; bool success; fence->ops->fence_value_str(fence, value, sizeof(value)); success = strlen(value); if (success) { seq_printf(s, ": %s", value); fence->ops->timeline_value_str(fence, value, sizeof(value)); if (strlen(value)) seq_printf(s, " / %s", value); } } seq_putc(s, '\n'); } static void sync_print_obj(struct seq_file *s, struct sync_timeline *obj) { struct list_head *pos; seq_printf(s, "%s: %d\n", obj->name, obj->value); spin_lock(&obj->lock); /* Caller already disabled IRQ. */ list_for_each(pos, &obj->pt_list) { struct sync_pt *pt = container_of(pos, struct sync_pt, link); sync_print_fence(s, &pt->base, false); } spin_unlock(&obj->lock); } static void sync_print_sync_file(struct seq_file *s, struct sync_file *sync_file) { char buf[128]; int i; seq_printf(s, "[%p] %s: %s\n", sync_file, sync_file_get_name(sync_file, buf, sizeof(buf)), sync_status_str(dma_fence_get_status(sync_file->fence))); if (dma_fence_is_array(sync_file->fence)) { struct dma_fence_array *array = to_dma_fence_array(sync_file->fence); for (i = 0; i < array->num_fences; ++i) sync_print_fence(s, array->fences[i], true); } else { sync_print_fence(s, sync_file->fence, true); } } static int sync_info_debugfs_show(struct seq_file *s, void *unused) { struct list_head *pos; seq_puts(s, "objs:\n--------------\n"); spin_lock_irq(&sync_timeline_list_lock); list_for_each(pos, &sync_timeline_list_head) { struct sync_timeline *obj = container_of(pos, struct sync_timeline, sync_timeline_list); sync_print_obj(s, obj); seq_putc(s, '\n'); } spin_unlock_irq(&sync_timeline_list_lock); seq_puts(s, "fences:\n--------------\n"); spin_lock_irq(&sync_file_list_lock); list_for_each(pos, &sync_file_list_head) { struct sync_file *sync_file = container_of(pos, struct sync_file, sync_file_list); sync_print_sync_file(s, sync_file); seq_putc(s, '\n'); } spin_unlock_irq(&sync_file_list_lock); return 0; } DEFINE_SHOW_ATTRIBUTE(sync_info_debugfs); static __init int sync_debugfs_init(void) { dbgfs = debugfs_create_dir("sync", NULL); /* * The debugfs files won't ever get removed and thus, there is * no need to protect it against removal races. The use of * debugfs_create_file_unsafe() is actually safe here. */ debugfs_create_file_unsafe("info", 0444, dbgfs, NULL, &sync_info_debugfs_fops); debugfs_create_file_unsafe("sw_sync", 0644, dbgfs, NULL, &sw_sync_debugfs_fops); return 0; } late_initcall(sync_debugfs_init); |