bsd-core/mach64

/*
 * 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 <string.h>
#include <errno.h>

#include "nouveau_private.h"

int
nouveau_channel_alloc(struct nouveau_device *dev, uint32_t fb_ctxdma,
		      uint32_t tt_ctxdma, struct nouveau_channel **chan)
{
	struct nouveau_device_priv *nvdev = nouveau_device(dev);
	struct nouveau_channel_priv *nvchan;
	unsigned i;
	int ret;

	if (!nvdev || !chan || *chan)
	    return -EINVAL;

	nvchan = calloc(1, sizeof(struct nouveau_channel_priv));
	if (!nvchan)
		return -ENOMEM;
	nvchan->base.device = dev;

	nvchan->drm.fb_ctxdma_handle = fb_ctxdma;
	nvchan->drm.tt_ctxdma_handle = tt_ctxdma;
	ret = drmCommandWriteRead(nvdev->fd, DRM_NOUVEAU_CHANNEL_ALLOC,
				  &nvchan->drm, sizeof(nvchan->drm));
	if (ret) {
		free(nvchan);
		return ret;
	}