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/*-
* 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.
*
* $FreeBSD$
*/
#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_SIZE_SHIFT 3
#define VMBUS_CHANPKT_GETLEN(pktlen) \
(((int)(pktlen)) << VMBUS_CHANPKT_SIZE_SHIFT)
struct vmbus_chanpkt_hdr {
uint16_t cph_type; /* VMBUS_CHANPKT_TYPE_ */
uint16_t cph_hlen; /* header len, in 8 bytes */
uint16_t cph_tlen; /* total len, in 8 bytes */
uint16_t cph_flags; /* VMBUS_CHANPKT_FLAG_ */
uint64_t cph_xactid;
} __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_CHANPKT_CONST_DATA(pkt) \
(const void *)((const uint8_t *)(pkt) + \
VMBUS_CHANPKT_GETLEN((pkt)->cph_hlen))
struct vmbus_rxbuf_desc {
uint32_t rb_len;
uint32_t rb_ofs;
} __packed;
struct vmbus_chanpkt_rxbuf {
struct vmbus_chanpkt_hdr cp_hdr;
uint16_t cp_rxbuf_id;
uint16_t cp_rsvd;
uint32_t cp_rxbuf_cnt;
struct vmbus_rxbuf_desc cp_rxbuf[];
} __packed;
#define VMBUS_CHAN_SGLIST_MAX 32
#define VMBUS_CHAN_PRPLIST_MAX 32
struct hv_vmbus_channel;
int vmbus_chan_recv(struct hv_vmbus_channel *chan, void *data, int *dlen,
uint64_t *xactid);
int vmbus_chan_recv_pkt(struct hv_vmbus_channel *chan,
struct vmbus_chanpkt_hdr *pkt, int *pktlen);
int vmbus_chan_send(struct hv_vmbus_channel *chan, uint16_t type,
uint16_t flags, void *data, int dlen, uint64_t xactid);
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_ */
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