2014-07-01 10:57:31 +00:00
|
|
|
/*
|
|
|
|
* drivers/base/sync.c
|
|
|
|
*
|
|
|
|
* Copyright (C) 2012 Google, Inc.
|
|
|
|
*
|
|
|
|
* This software is licensed under the terms of the GNU General Public
|
|
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
|
|
* may be copied, distributed, and modified under those terms.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/debugfs.h>
|
|
|
|
#include <linux/export.h>
|
|
|
|
#include <linux/file.h>
|
|
|
|
#include <linux/fs.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/poll.h>
|
|
|
|
#include <linux/sched.h>
|
|
|
|
#include <linux/seq_file.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/uaccess.h>
|
|
|
|
#include <linux/anon_inodes.h>
|
2014-10-26 13:50:16 +00:00
|
|
|
#include <linux/time64.h>
|
2014-07-01 10:57:31 +00:00
|
|
|
#include "sync.h"
|
|
|
|
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
|
|
|
|
static LIST_HEAD(sync_timeline_list_head);
|
|
|
|
static DEFINE_SPINLOCK(sync_timeline_list_lock);
|
|
|
|
static LIST_HEAD(sync_fence_list_head);
|
|
|
|
static DEFINE_SPINLOCK(sync_fence_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_fence_debug_add(struct sync_fence *fence)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&sync_fence_list_lock, flags);
|
|
|
|
list_add_tail(&fence->sync_fence_list, &sync_fence_list_head);
|
|
|
|
spin_unlock_irqrestore(&sync_fence_list_lock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
void sync_fence_debug_remove(struct sync_fence *fence)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&sync_fence_list_lock, flags);
|
|
|
|
list_del(&fence->sync_fence_list);
|
|
|
|
spin_unlock_irqrestore(&sync_fence_list_lock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const char *sync_status_str(int status)
|
|
|
|
{
|
|
|
|
if (status == 0)
|
|
|
|
return "signaled";
|
2014-07-12 19:55:56 +00:00
|
|
|
|
|
|
|
if (status > 0)
|
2014-07-01 10:57:31 +00:00
|
|
|
return "active";
|
2014-07-12 19:55:56 +00:00
|
|
|
|
|
|
|
return "error";
|
2014-07-01 10:57:31 +00:00
|
|
|
}
|
|
|
|
|
2015-12-11 13:11:49 +00:00
|
|
|
static void sync_print_pt(struct seq_file *s, struct fence *pt, bool fence)
|
2014-07-01 10:57:31 +00:00
|
|
|
{
|
|
|
|
int status = 1;
|
|
|
|
|
2015-12-11 13:11:49 +00:00
|
|
|
if (fence_is_signaled_locked(pt))
|
|
|
|
status = pt->status;
|
2014-07-01 10:57:31 +00:00
|
|
|
|
|
|
|
seq_printf(s, " %s%spt %s",
|
2015-12-11 13:11:49 +00:00
|
|
|
fence && pt->ops->get_timeline_name ?
|
|
|
|
pt->ops->get_timeline_name(pt) : "",
|
2014-07-01 10:57:31 +00:00
|
|
|
fence ? "_" : "",
|
|
|
|
sync_status_str(status));
|
|
|
|
|
|
|
|
if (status <= 0) {
|
2014-12-24 15:33:02 +00:00
|
|
|
struct timespec64 ts64 =
|
2015-12-11 13:11:49 +00:00
|
|
|
ktime_to_timespec64(pt->timestamp);
|
2014-07-12 19:55:56 +00:00
|
|
|
|
2014-10-26 13:50:16 +00:00
|
|
|
seq_printf(s, "@%lld.%09ld", (s64)ts64.tv_sec, ts64.tv_nsec);
|
2014-07-01 10:57:31 +00:00
|
|
|
}
|
|
|
|
|
2015-12-11 13:11:49 +00:00
|
|
|
if ((!fence || pt->ops->timeline_value_str) &&
|
|
|
|
pt->ops->fence_value_str) {
|
2014-07-01 10:57:31 +00:00
|
|
|
char value[64];
|
2015-12-11 13:11:49 +00:00
|
|
|
bool success;
|
2014-07-12 19:55:56 +00:00
|
|
|
|
2015-12-11 13:11:49 +00:00
|
|
|
pt->ops->fence_value_str(pt, value, sizeof(value));
|
|
|
|
success = strlen(value);
|
|
|
|
|
|
|
|
if (success)
|
|
|
|
seq_printf(s, ": %s", value);
|
|
|
|
|
|
|
|
if (success && fence) {
|
|
|
|
pt->ops->timeline_value_str(pt, value, sizeof(value));
|
|
|
|
|
|
|
|
if (strlen(value))
|
|
|
|
seq_printf(s, " / %s", value);
|
2014-07-01 10:57:31 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
seq_puts(s, "\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
static void sync_print_obj(struct seq_file *s, struct sync_timeline *obj)
|
|
|
|
{
|
|
|
|
struct list_head *pos;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
seq_printf(s, "%s %s", obj->name, obj->ops->driver_name);
|
|
|
|
|
|
|
|
if (obj->ops->timeline_value_str) {
|
|
|
|
char value[64];
|
2014-07-12 19:55:56 +00:00
|
|
|
|
2014-07-01 10:57:31 +00:00
|
|
|
obj->ops->timeline_value_str(obj, value, sizeof(value));
|
|
|
|
seq_printf(s, ": %s", value);
|
|
|
|
}
|
|
|
|
|
|
|
|
seq_puts(s, "\n");
|
|
|
|
|
|
|
|
spin_lock_irqsave(&obj->child_list_lock, flags);
|
|
|
|
list_for_each(pos, &obj->child_list_head) {
|
|
|
|
struct sync_pt *pt =
|
|
|
|
container_of(pos, struct sync_pt, child_list);
|
2015-12-11 13:11:49 +00:00
|
|
|
sync_print_pt(s, &pt->base, false);
|
2014-07-01 10:57:31 +00:00
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&obj->child_list_lock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void sync_print_fence(struct seq_file *s, struct sync_fence *fence)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
seq_printf(s, "[%p] %s: %s\n", fence, fence->name,
|
|
|
|
sync_status_str(atomic_read(&fence->status)));
|
|
|
|
|
2016-01-08 17:15:31 +00:00
|
|
|
for (i = 0; i < fence->num_fences; ++i)
|
2015-12-11 13:11:49 +00:00
|
|
|
sync_print_pt(s, fence->cbs[i].sync_pt, true);
|
2014-07-01 10:57:31 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int sync_debugfs_show(struct seq_file *s, void *unused)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
struct list_head *pos;
|
|
|
|
|
|
|
|
seq_puts(s, "objs:\n--------------\n");
|
|
|
|
|
|
|
|
spin_lock_irqsave(&sync_timeline_list_lock, flags);
|
|
|
|
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_puts(s, "\n");
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
|
|
|
|
|
|
|
|
seq_puts(s, "fences:\n--------------\n");
|
|
|
|
|
|
|
|
spin_lock_irqsave(&sync_fence_list_lock, flags);
|
|
|
|
list_for_each(pos, &sync_fence_list_head) {
|
|
|
|
struct sync_fence *fence =
|
|
|
|
container_of(pos, struct sync_fence, sync_fence_list);
|
|
|
|
|
|
|
|
sync_print_fence(s, fence);
|
|
|
|
seq_puts(s, "\n");
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&sync_fence_list_lock, flags);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int sync_debugfs_open(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
return single_open(file, sync_debugfs_show, inode->i_private);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct file_operations sync_debugfs_fops = {
|
|
|
|
.open = sync_debugfs_open,
|
|
|
|
.read = seq_read,
|
|
|
|
.llseek = seq_lseek,
|
|
|
|
.release = single_release,
|
|
|
|
};
|
|
|
|
|
|
|
|
static __init int sync_debugfs_init(void)
|
|
|
|
{
|
|
|
|
debugfs_create_file("sync", S_IRUGO, NULL, NULL, &sync_debugfs_fops);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
late_initcall(sync_debugfs_init);
|
|
|
|
|
|
|
|
#define DUMP_CHUNK 256
|
|
|
|
static char sync_dump_buf[64 * 1024];
|
|
|
|
void sync_dump(void)
|
|
|
|
{
|
|
|
|
struct seq_file s = {
|
|
|
|
.buf = sync_dump_buf,
|
|
|
|
.size = sizeof(sync_dump_buf) - 1,
|
|
|
|
};
|
|
|
|
int i;
|
|
|
|
|
|
|
|
sync_debugfs_show(&s, NULL);
|
|
|
|
|
|
|
|
for (i = 0; i < s.count; i += DUMP_CHUNK) {
|
|
|
|
if ((s.count - i) > DUMP_CHUNK) {
|
|
|
|
char c = s.buf[i + DUMP_CHUNK];
|
2014-07-12 19:55:56 +00:00
|
|
|
|
2014-07-01 10:57:31 +00:00
|
|
|
s.buf[i + DUMP_CHUNK] = 0;
|
|
|
|
pr_cont("%s", s.buf + i);
|
|
|
|
s.buf[i + DUMP_CHUNK] = c;
|
|
|
|
} else {
|
|
|
|
s.buf[s.count] = 0;
|
|
|
|
pr_cont("%s", s.buf + i);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|