1/*-
2 * Copyright (c) 2009-2012,2016-2017 Microsoft Corp.
3 * Copyright (c) 2010-2012 Citrix Inc.
4 * Copyright (c) 2012 NetApp Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice unmodified, this list of conditions, and the following
12 *    disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/sys/dev/hyperv/netvsc/hn_nvs.h 322612 2017-08-17 05:09:22Z sephe $
29 */
30
31#ifndef _HN_NVS_H_
32#define _HN_NVS_H_
33
34struct hn_nvs_sendctx;
35struct vmbus_channel;
36struct hn_softc;
37
38typedef void		(*hn_nvs_sent_t)
39			(struct hn_nvs_sendctx *, struct hn_softc *,
40			 struct vmbus_channel *, const void *, int);
41
42struct hn_nvs_sendctx {
43	hn_nvs_sent_t	hn_cb;
44	void		*hn_cbarg;
45};
46
47#define HN_NVS_SENDCTX_INITIALIZER(cb, cbarg)	\
48{						\
49	.hn_cb		= cb,			\
50	.hn_cbarg	= cbarg			\
51}
52
53static __inline void
54hn_nvs_sendctx_init(struct hn_nvs_sendctx *sndc, hn_nvs_sent_t cb, void *cbarg)
55{
56
57	sndc->hn_cb = cb;
58	sndc->hn_cbarg = cbarg;
59}
60
61static __inline int
62hn_nvs_send(struct vmbus_channel *chan, uint16_t flags,
63    void *nvs_msg, int nvs_msglen, struct hn_nvs_sendctx *sndc)
64{
65
66	return (vmbus_chan_send(chan, VMBUS_CHANPKT_TYPE_INBAND, flags,
67	    nvs_msg, nvs_msglen, (uint64_t)(uintptr_t)sndc));
68}
69
70static __inline int
71hn_nvs_send_sglist(struct vmbus_channel *chan, struct vmbus_gpa sg[], int sglen,
72    void *nvs_msg, int nvs_msglen, struct hn_nvs_sendctx *sndc)
73{
74
75	return (vmbus_chan_send_sglist(chan, sg, sglen, nvs_msg, nvs_msglen,
76	    (uint64_t)(uintptr_t)sndc));
77}
78
79static __inline int
80hn_nvs_send_rndis_sglist(struct vmbus_channel *chan, uint32_t rndis_mtype,
81    struct hn_nvs_sendctx *sndc, struct vmbus_gpa *gpa, int gpa_cnt)
82{
83	struct hn_nvs_rndis rndis;
84
85	rndis.nvs_type = HN_NVS_TYPE_RNDIS;
86	rndis.nvs_rndis_mtype = rndis_mtype;
87	rndis.nvs_chim_idx = HN_NVS_CHIM_IDX_INVALID;
88	rndis.nvs_chim_sz = 0;
89
90	return (hn_nvs_send_sglist(chan, gpa, gpa_cnt,
91	    &rndis, sizeof(rndis), sndc));
92}
93
94int		hn_nvs_attach(struct hn_softc *sc, int mtu);
95void		hn_nvs_detach(struct hn_softc *sc);
96int		hn_nvs_alloc_subchans(struct hn_softc *sc, int *nsubch);
97void		hn_nvs_sent_xact(struct hn_nvs_sendctx *sndc,
98		    struct hn_softc *sc, struct vmbus_channel *chan,
99		    const void *data, int dlen);
100int		hn_nvs_send_rndis_ctrl(struct vmbus_channel *chan,
101		    struct hn_nvs_sendctx *sndc, struct vmbus_gpa *gpa,
102		    int gpa_cnt);
103void		hn_nvs_set_datapath(struct hn_softc *sc, uint32_t path);
104
105extern struct hn_nvs_sendctx	hn_nvs_sendctx_none;
106
107#endif  /* !_HN_NVS_H_ */
108