![Chris Wilson](/assets/img/avatar_default.png)
sync_dump() is an unused, unexported, function that adds 64k to the kernel image and doesn't even provide locking around the global array it uses. add/remove: 0/2 grow/shrink: 0/0 up/down: 0/-65734 (-65734) Function old new delta sync_dump 198 - -198 sync_dump_buf 65536 - -65536 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Gustavo Padovan <gustavo@padovan.org> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20190419181904.6199-1-chris@chris-wilson.co.uk
200 lines
5 KiB
C
200 lines
5 KiB
C
/*
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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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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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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