dfv_common_xen.h

/*
 * Device File-based I/O Virtualization (DFV)
 * File: dfv_common_xen.h
 *
 * Copyright (c) 2014 Rice University, Houston, TX, USA
 * All rights reserved.
 *
 * Authors: Ardalan Amiri Sani <arrdalan@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation; or, when distributed
 * separately from the Linux kernel or incorporated into other
 * software packages, subject to the following license:
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this source file (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 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.
 */

#include <xen/interface/io/ring.h>

#define GRANT_INVALID_REF	0

struct dfv_xen_req {
	unsigned long arg1;
	unsigned long arg2;
	unsigned long arg3;
	unsigned long arg4;
	unsigned long arg5;
	unsigned long arg6;
	unsigned long grant;
};

struct dfv_xen_rsp {
	unsigned long arg1;
	unsigned long arg2;
	unsigned long arg3;
	unsigned long arg4;
	unsigned long arg5;
	unsigned long arg6;
};

/*
 * This expands to:
 *
 *     struct dfv_sring      - The shared ring.
 *     struct dfv_front_ring - The 'front' half of the ring.
 *     struct dfv_back_ring  - The 'back' half of the ring.
 */
DEFINE_RING_TYPES(dfv, struct dfv_xen_req, struct dfv_xen_rsp);

void copy_dfv_req(struct dfv_xen_req *dst, struct dfv_xen_req *src);
void copy_dfv_rsp(struct dfv_xen_rsp *dst, struct dfv_xen_rsp *src);

/* dummy */
struct dfv2_xen_req {
	unsigned long unused;
};

struct dfv2_xen_rsp {
	unsigned long type;
	unsigned long thread_id;
	unsigned long process_id;
};

DEFINE_RING_TYPES(dfv2, struct dfv2_xen_req, struct dfv2_xen_rsp);