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