xref: /freebsd-11-stable/sys/dev/hyperv/include/vmbus.h

/*-
 * Copyright (c) 2016 Microsoft Corp.
 * 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 unmodified, 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 ``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 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: stable/11/sys/dev/hyperv/include/vmbus.h 307455 2016-10-17 02:30:45Z sephe $
 */

#ifndef _VMBUS_H_
#define _VMBUS_H_

#include <sys/param.h>

/*
 * GPA stuffs.
 */
struct vmbus_gpa_range {
	uint32_t	gpa_len;
	uint32_t	gpa_ofs;
	uint64_t	gpa_page[0];
} __packed;

/* This is actually vmbus_gpa_range.gpa_page[1] */
struct vmbus_gpa {
	uint32_t	gpa_len;
	uint32_t	gpa_ofs;
	uint64_t	gpa_page;
} __packed;

#define VMBUS_CHANPKT_TYPE_INBAND	0x0006
#define VMBUS_CHANPKT_TYPE_RXBUF	0x0007
#define VMBUS_CHANPKT_TYPE_GPA		0x0009
#define VMBUS_CHANPKT_TYPE_COMP		0x000b

#define VMBUS_CHANPKT_FLAG_RC		0x0001	/* report completion */

#define VMBUS_CHAN_SGLIST_MAX		32
#define VMBUS_CHAN_PRPLIST_MAX		32

struct hv_vmbus_channel;

int	vmbus_chan_send_sglist(struct hv_vmbus_channel *chan,
	    struct vmbus_gpa sg[], int sglen, void *data, int dlen,
	    uint64_t xactid);
int	vmbus_chan_send_prplist(struct hv_vmbus_channel *chan,
	    struct vmbus_gpa_range *prp, int prp_cnt, void *data, int dlen,
	    uint64_t xactid);

#endif	/* !_VMBUS_H_ */