/*-
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * All Rights Reserved.
 *
 * 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
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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:
 *    Rickard E. (Rik) Faith <faith@valinux.com>
 *    Gareth Hughes <gareth@valinux.com>
 *
 */

/** @file drm_ioctl.c
 * Varios minor DRM ioctls not applicable to other files, such as versioning
 * information and reporting DRM information to userland.
 */

#include "drmP.h"

/*
 * Beginning in revision 1.1 of the DRM interface, getunique will return
 * a unique in the form pci:oooo:bb:dd.f (o=domain, b=bus, d=device, f=function)
 * before setunique has been called.  The format for the bus-specific part of
 * the unique is not defined for any other bus.
 */
int
drm_getunique(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
	struct drm_unique	 *u = data;

	if (u->unique_len >= dev->unique_len) {
		if (DRM_COPY_TO_USER(u->unique, dev->unique, dev->unique_len))
			return EFAULT;
	}
	u->unique_len = dev->unique_len;

	return 0;
}

int
drm_getmap(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
	struct drm_map	*map = data;
	drm_local_map_t	*mapinlist;
	int		 idx, i = 0;

	idx = map->offset;

	DRM_LOCK();
	if (idx < 0) {
		DRM_UNLOCK();
		return EINVAL;
	}

	TAILQ_FOREACH(mapinlist, &dev->maplist, link) {
		if (i == idx) {
			map->offset = mapinlist->offset;
			map->size = mapinlist->size;
			map->type = mapinlist->type;
			map->flags = mapinlist->flags;
			map->handle = mapinlist->handle;
			map->mtrr = mapinlist->mtrr;
			break;
		}
		i++;
	}

	DRM_UNLOCK();

 	if (mapinlist == NULL)
		return EINVAL;

	return 0;
}

#define DRM_IF_MAJOR	1
#define DRM_IF_MINOR	2

int
drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
	struct drm_set_version	ver, *sv = data;
	int			if_version;

	/* Save the incoming data, and set the response before continuing
	 * any further.
	 */
	ver = *sv;
	sv->drm_di_major = DRM_IF_MAJOR;
	sv->drm_di_minor = DRM_IF_MINOR;
	sv->drm_dd_major = dev->driver->major;
	sv->drm_dd_minor = dev->driver->minor;

	/*
	 * We no longer support interface versions less than 1.1, so error
	 * out if the xserver is too old. 1.1 always ties the drm to a
	 * certain busid, this was done on attach
	 */
	if (ver.drm_di_major != -1) {
		if (ver.drm_di_major != DRM_IF_MAJOR || ver.drm_di_minor < 1 ||
		    ver.drm_di_minor > DRM_IF_MINOR) {
			return EINVAL;
		}
		if_version = DRM_IF_VERSION(ver.drm_di_major, ver.drm_dd_minor);
		dev->if_version = DRM_MAX(if_version, dev->if_version);
	}

	if (ver.drm_dd_major != -1) {
		if (ver.drm_dd_major != dev->driver->major ||
		    ver.drm_dd_minor < 0 ||
		    ver.drm_dd_minor > dev->driver->minor)
			return EINVAL;
	}

	return 0;
}