linux-imx

/*

 * 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 "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);

    }