/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */

/*

 * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>

 *

 * 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 (including the next

 * paragraph) 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 OR COPYRIGHT HOLDERS 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.

 *

 * Authors:

 *    Rob Clark <robclark@freedesktop.org>

 */

#include <sys/types.h>

#include <sys/stat.h>

#include <unistd.h>

#include "freedreno_drmif.h"

#include "freedreno_priv.h"

static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;

struct fd_device * kgsl_device_new(int fd);

struct fd_device * msm_device_new(int fd);

drm_public struct fd_device * fd_device_new(int fd)

{

	struct fd_device *dev;

	drmVersionPtr version;

	/* figure out if we are kgsl or msm drm driver: */

	version = drmGetVersion(fd);

	if (!version) {

		ERROR_MSG("cannot get version: %s", strerror(errno));

		return NULL;

	}

	if (!strcmp(version->name, "msm")) {

		DEBUG_MSG("msm DRM device");

		if (version->version_major != 1) {

			ERROR_MSG("unsupported version: %u.%u.%u", version->version_major,

				version->version_minor, version->version_patchlevel);

			dev = NULL;

			goto out;

		}

		dev = msm_device_new(fd);

		dev->version = version->version_minor;

#if HAVE_FREEDRENO_KGSL

	} else if (!strcmp(version->name, "kgsl")) {

		DEBUG_MSG("kgsl DRM device");

		dev = kgsl_device_new(fd);

#endif

	} else {

		ERROR_MSG("unknown device: %s", version->name);

		dev = NULL;

	}

out:

	drmFreeVersion(version);

	if (!dev)

		return NULL;

	atomic_set(&dev->refcnt, 1);

	dev->fd = fd;

	dev->handle_table = drmHashCreate();

	dev->name_table = drmHashCreate();

	fd_bo_cache_init(&dev->bo_cache, FALSE);

	fd_bo_cache_init(&dev->ring_cache, TRUE);

	return dev;

}

/* like fd_device_new() but creates it's own private dup() of the fd

 * which is close()d when the device is finalized.

 */

drm_public struct fd_device * fd_device_new_dup(int fd)

{

	int dup_fd = dup(fd);

	struct fd_device *dev = fd_device_new(dup_fd);

	if (dev)

		dev->closefd = 1;

	else

		close(dup_fd);

	return dev;

}

drm_public struct fd_device * fd_device_ref(struct fd_device *dev)

{

	atomic_inc(&dev->refcnt);

	return dev;

}

static void fd_device_del_impl(struct fd_device *dev)

{

	int close_fd = dev->closefd ? dev->fd : -1;

	fd_bo_cache_cleanup(&dev->bo_cache, 0);

	drmHashDestroy(dev->handle_table);

	drmHashDestroy(dev->name_table);

	dev->funcs->destroy(dev);

	if (close_fd >= 0)

		close(close_fd);

}

drm_private void fd_device_del_locked(struct fd_device *dev)

{

	if (!atomic_dec_and_test(&dev->refcnt))

		return;

	fd_device_del_impl(dev);

}

drm_public void fd_device_del(struct fd_device *dev)

{

	if (!atomic_dec_and_test(&dev->refcnt))

		return;

	pthread_mutex_lock(&table_lock);

	fd_device_del_impl(dev);

	pthread_mutex_unlock(&table_lock);

}

drm_public int fd_device_fd(struct fd_device *dev)

{

	return dev->fd;

}

drm_public enum fd_version fd_device_version(struct fd_device *dev)

{

	return dev->version;

}