dma-buf/sw_sync: de-stage SW_SYNC
SW_SYNC allows to run tests on the sync_file framework via debugfs on <debugfs>/sync/sw_sync Opening and closing the file triggers creation and release of a sync timeline. To create fences on this timeline the SW_SYNC_IOC_CREATE_FENCE ioctl should be used. To increment the timeline value use SW_SYNC_IOC_INC. Also it exports Sync information on <debugfs>/sync/info Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gustavo Padovan
committed by
Greg Kroah-Hartman
Greg Kroah-Hartman
parent
fc0c9a03b5
commit
35538d7822
230
drivers/dma-buf/sync_debug.c
Normal file
230
drivers/dma-buf/sync_debug.c
Normal file
@@ -0,0 +1,230 @@
|
||||
/*
|
||||
* Sync File validation framework and debug information
|
||||
*
|
||||
* 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 "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 "signaled";
|
||||
|
||||
if (status > 0)
|
||||
return "active";
|
||||
|
||||
return "error";
|
||||
}
|
||||
|
||||
static void sync_print_fence(struct seq_file *s, struct fence *fence, bool show)
|
||||
{
|
||||
int status = 1;
|
||||
struct sync_timeline *parent = fence_parent(fence);
|
||||
|
||||
if (fence_is_signaled_locked(fence))
|
||||
status = fence->status;
|
||||
|
||||
seq_printf(s, " %s%sfence %s",
|
||||
show ? parent->name : "",
|
||||
show ? "_" : "",
|
||||
sync_status_str(status));
|
||||
|
||||
if (status <= 0) {
|
||||
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_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: %d\n", obj->name, obj->value);
|
||||
|
||||
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);
|
||||
sync_print_fence(s, &pt->base, false);
|
||||
}
|
||||
spin_unlock_irqrestore(&obj->child_list_lock, flags);
|
||||
}
|
||||
|
||||
static void sync_print_sync_file(struct seq_file *s,
|
||||
struct sync_file *sync_file)
|
||||
{
|
||||
int i;
|
||||
|
||||
seq_printf(s, "[%p] %s: %s\n", sync_file, sync_file->name,
|
||||
sync_status_str(atomic_read(&sync_file->status)));
|
||||
|
||||
for (i = 0; i < sync_file->num_fences; ++i)
|
||||
sync_print_fence(s, sync_file->cbs[i].fence, true);
|
||||
}
|
||||
|
||||
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_file_list_lock, flags);
|
||||
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_puts(s, "\n");
|
||||
}
|
||||
spin_unlock_irqrestore(&sync_file_list_lock, flags);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sync_info_debugfs_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return single_open(file, sync_debugfs_show, inode->i_private);
|
||||
}
|
||||
|
||||
static const struct file_operations sync_info_debugfs_fops = {
|
||||
.open = sync_info_debugfs_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = single_release,
|
||||
};
|
||||
|
||||
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);
|
||||
|
||||
#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];
|
||||
|
||||
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);
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user