linux-imx

/*

 * seqno-fence, using a dma-buf to synchronize fencing

 *

 * Copyright (C) 2012 Texas Instruments

 * Copyright (C) 2012-2014 Canonical Ltd

 * Authors:

 *   Rob Clark <robdclark@gmail.com>

 *   Maarten Lankhorst <maarten.lankhorst@canonical.com>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 as published by

 * the Free Software Foundation.

 *

 * 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/slab.h>

#include <linux/export.h>

#include <linux/seqno-fence.h>

​

static const char *seqno_fence_get_driver_name(struct dma_fence *fence)

{

    struct seqno_fence *seqno_fence = to_seqno_fence(fence);

​

    return seqno_fence->ops->get_driver_name(fence);

}

​

static const char *seqno_fence_get_timeline_name(struct dma_fence *fence)

{

    struct seqno_fence *seqno_fence = to_seqno_fence(fence);

​

    return seqno_fence->ops->get_timeline_name(fence);

}

​

static bool seqno_enable_signaling(struct dma_fence *fence)

{

    struct seqno_fence *seqno_fence = to_seqno_fence(fence);

​

    return seqno_fence->ops->enable_signaling(fence);

}

​

static bool seqno_signaled(struct dma_fence *fence)

{

    struct seqno_fence *seqno_fence = to_seqno_fence(fence);

​

    return seqno_fence->ops->signaled && seqno_fence->ops->signaled(fence);

}

​

static void seqno_release(struct dma_fence *fence)

{

    struct seqno_fence *f = to_seqno_fence(fence);

​

    dma_buf_put(f->sync_buf);

    if (f->ops->release)

        f->ops->release(fence);

    else

        dma_fence_free(&f->base);

}

​

static signed long seqno_wait(struct dma_fence *fence, bool intr,