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
29 #ifndef _HN_NVS_H_
30 #define _HN_NVS_H_
31
32 struct hn_nvs_sendctx;
33 struct vmbus_channel;
34 struct hn_softc;
35
36 typedef void (*hn_nvs_sent_t)
37 (struct hn_nvs_sendctx *, struct hn_softc *,
38 struct vmbus_channel *, const void *, int);
39
40 struct hn_nvs_sendctx {
41 hn_nvs_sent_t hn_cb;
42 void *hn_cbarg;
43 };
44
45 #define HN_NVS_SENDCTX_INITIALIZER(cb, cbarg) \
46 { \
47 .hn_cb = cb, \
48 .hn_cbarg = cbarg \
49 }
50
51 static __inline void
hn_nvs_sendctx_init(struct hn_nvs_sendctx * sndc,hn_nvs_sent_t cb,void * cbarg)52 hn_nvs_sendctx_init(struct hn_nvs_sendctx *sndc, hn_nvs_sent_t cb, void *cbarg)
53 {
54
55 sndc->hn_cb = cb;
56 sndc->hn_cbarg = cbarg;
57 }
58
59 static __inline int
hn_nvs_send(struct vmbus_channel * chan,uint16_t flags,void * nvs_msg,int nvs_msglen,struct hn_nvs_sendctx * sndc)60 hn_nvs_send(struct vmbus_channel *chan, uint16_t flags,
61 void *nvs_msg, int nvs_msglen, struct hn_nvs_sendctx *sndc)
62 {
63
64 return (vmbus_chan_send(chan, VMBUS_CHANPKT_TYPE_INBAND, flags,
65 nvs_msg, nvs_msglen, (uint64_t)(uintptr_t)sndc));
66 }
67
68 static __inline int
hn_nvs_send_sglist(struct vmbus_channel * chan,struct vmbus_gpa sg[],int sglen,void * nvs_msg,int nvs_msglen,struct hn_nvs_sendctx * sndc)69 hn_nvs_send_sglist(struct vmbus_channel *chan, struct vmbus_gpa sg[], int sglen,
70 void *nvs_msg, int nvs_msglen, struct hn_nvs_sendctx *sndc)
71 {
72
73 return (vmbus_chan_send_sglist(chan, sg, sglen, nvs_msg, nvs_msglen,
74 (uint64_t)(uintptr_t)sndc));
75 }
76
77 static __inline int
hn_nvs_send_rndis_sglist(struct vmbus_channel * chan,uint32_t rndis_mtype,struct hn_nvs_sendctx * sndc,struct vmbus_gpa * gpa,int gpa_cnt)78 hn_nvs_send_rndis_sglist(struct vmbus_channel *chan, uint32_t rndis_mtype,
79 struct hn_nvs_sendctx *sndc, struct vmbus_gpa *gpa, int gpa_cnt)
80 {
81 struct hn_nvs_rndis rndis;
82
83 rndis.nvs_type = HN_NVS_TYPE_RNDIS;
84 rndis.nvs_rndis_mtype = rndis_mtype;
85 rndis.nvs_chim_idx = HN_NVS_CHIM_IDX_INVALID;
86 rndis.nvs_chim_sz = 0;
87
88 return (hn_nvs_send_sglist(chan, gpa, gpa_cnt,
89 &rndis, sizeof(rndis), sndc));
90 }
91
92 int hn_nvs_attach(struct hn_softc *sc, int mtu);
93 void hn_nvs_detach(struct hn_softc *sc);
94 int hn_nvs_alloc_subchans(struct hn_softc *sc, int *nsubch);
95 void hn_nvs_sent_xact(struct hn_nvs_sendctx *sndc,
96 struct hn_softc *sc, struct vmbus_channel *chan,
97 const void *data, int dlen);
98 int hn_nvs_send_rndis_ctrl(struct vmbus_channel *chan,
99 struct hn_nvs_sendctx *sndc, struct vmbus_gpa *gpa,
100 int gpa_cnt);
101 void hn_nvs_set_datapath(struct hn_softc *sc, uint32_t path);
102
103 extern struct hn_nvs_sendctx hn_nvs_sendctx_none;
104
105 #endif /* !_HN_NVS_H_ */
106