#-
# Copyright (c) 2015 Roger Pau Monnﾃｩ <royger@FreeBSD.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#

#include <sys/bus.h>

INTERFACE xenmem;

#
# Default implementations of some methods.
#
CODE {
static struct resource *
xenmem_generic_alloc(device_t dev, device_t child, int *res_id,
size_t size)
{
device_t parent;

parent = device_get_parent(dev);
if (parent == NULL)
return (NULL);
return (XENMEM_ALLOC(parent, child, res_id, size));
}

static int
xenmem_generic_free(device_t dev, device_t child, int res_id,
struct resource *res)
{
device_t parent;

parent = device_get_parent(dev);
if (parent == NULL)
return (ENXIO);
return (XENMEM_FREE(parent, child, res_id, res));
}
};

/**
* @brief Request for unused physical memory regions.
*
* @param _dev the device whose child was being probed.
* @param _child the child device which failed to probe.
* @param _res_id a pointer to the resource identifier.
* @param _size size of the required memory region.
*
* @returns the resource which was allocated or @c NULL if no
* resource could be allocated.
*/
METHOD struct resource * alloc {
device_t _dev;
device_t _child;
int *_res_id;
size_t _size;
} DEFAULT xenmem_generic_alloc;

/**
* @brief Free physical memory regions.
*
* @param _dev the device whose child was being probed.
* @param _child the child device which failed to probe.
* @param _res_id the resource identifier.
* @param _res the resource.
*
* @returns 0 on success, otherwise an error code.
*/
METHOD int free {
device_t _dev;
device_t _child;
int _res_id;
struct resource *_res;
} DEFAULT xenmem_generic_free;