asdk-libdrm

/*

 * Copyright 2007 Nouveau Project

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF

 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 */

​

#include <stdlib.h>

#include <errno.h>

#include <sys/time.h>

​

#include "nouveau_private.h"

​

#define NOTIFIER(__v)                                                          \

    struct nouveau_notifier_priv *nvnotify = nouveau_notifier(notifier);   \

    volatile uint32_t *__v = (uint32_t *)((char *)nvnotify->map + (id * 32))

​

int

nouveau_notifier_alloc(struct nouveau_channel *chan, uint32_t handle,

               int count, struct nouveau_notifier **notifier)

{

    struct nouveau_notifier_priv *nvnotify;

    int ret;

​

    if (!chan || !notifier || *notifier)

        return -EINVAL;

​

    nvnotify = calloc(1, sizeof(struct nouveau_notifier_priv));

    if (!nvnotify)

        return -ENOMEM;

    nvnotify->base.channel = chan;

    nvnotify->base.handle  = handle;

​

    nvnotify->drm.channel = chan->id;

    nvnotify->drm.handle  = handle;

    nvnotify->drm.size    = (count * 32);

    if ((ret = drmCommandWriteRead(nouveau_device(chan->device)->fd,

                       DRM_NOUVEAU_NOTIFIEROBJ_ALLOC,

                       &nvnotify->drm,

                       sizeof(nvnotify->drm)))) {

        nouveau_notifier_free((void *)&nvnotify);

        return ret;

    }

​

    nvnotify->map = (char *)nouveau_channel(chan)->notifier_bo->map +

                nvnotify->drm.offset;

    *notifier = &nvnotify->base;

    return 0;