/*-
 * Copyright (c) 2009-2012,2016-2017 Microsoft Corp.
 * Copyright (c) 2010-2012 Citrix Inc.
 * Copyright (c) 2012 NetApp Inc.
 * 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.
 */

#ifndef _HN_NVS_H_
#define _HN_NVS_H_

struct hn_nvs_sendctx;
struct vmbus_channel;
struct hn_softc;

typedef void            (*hn_nvs_sent_t)
                        (struct hn_nvs_sendctx *, struct hn_softc *,
                         struct vmbus_channel *, const void *, int);

struct hn_nvs_sendctx {
        hn_nvs_sent_t   hn_cb;
        void            *hn_cbarg;
};

#define HN_NVS_SENDCTX_INITIALIZER(cb, cbarg)   \
{                                               \
        .hn_cb          = cb,                   \
        .hn_cbarg       = cbarg                 \
}

static __inline void
hn_nvs_sendctx_init(struct hn_nvs_sendctx *sndc, hn_nvs_sent_t cb, void *cbarg)
{

        sndc->hn_cb = cb;
        sndc->hn_cbarg = cbarg;
}

static __inline int
hn_nvs_send(struct vmbus_channel *chan, uint16_t flags,
    void *nvs_msg, int nvs_msglen, struct hn_nvs_sendctx *sndc)
{

        return (vmbus_chan_send(chan, VMBUS_CHANPKT_TYPE_INBAND, flags,
            nvs_msg, nvs_msglen, (uint64_t)(uintptr_t)sndc));
}

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)
{

        return (vmbus_chan_send_sglist(chan, sg, sglen, nvs_msg, nvs_msglen,
            (uint64_t)(uintptr_t)sndc));
}

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)
{
        struct hn_nvs_rndis rndis;

        rndis.nvs_type = HN_NVS_TYPE_RNDIS;
        rndis.nvs_rndis_mtype = rndis_mtype;
        rndis.nvs_chim_idx = HN_NVS_CHIM_IDX_INVALID;
        rndis.nvs_chim_sz = 0;

        return (hn_nvs_send_sglist(chan, gpa, gpa_cnt,
            &rndis, sizeof(rndis), sndc));
}

int             hn_nvs_attach(struct hn_softc *sc, int mtu);
void            hn_nvs_detach(struct hn_softc *sc);
int             hn_nvs_alloc_subchans(struct hn_softc *sc, int *nsubch);
void            hn_nvs_sent_xact(struct hn_nvs_sendctx *sndc,
                    struct hn_softc *sc, struct vmbus_channel *chan,
                    const void *data, int dlen);
int             hn_nvs_send_rndis_ctrl(struct vmbus_channel *chan,
                    struct hn_nvs_sendctx *sndc, struct vmbus_gpa *gpa,
                    int gpa_cnt);
void            hn_nvs_set_datapath(struct hn_softc *sc, uint32_t path);

extern struct hn_nvs_sendctx    hn_nvs_sendctx_none;

#endif  /* !_HN_NVS_H_ */