/*      $NetBSD: if_agrether.c,v 1.12 2021/11/30 01:17:02 yamaguchi Exp $       */

/*-
* Copyright (c)2005 YAMAMOTO Takashi,
* 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, 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_agrether.c,v 1.12 2021/11/30 01:17:02 yamaguchi Exp $");

#include <sys/param.h>
#include <sys/callout.h>
#include <sys/mbuf.h>
#include <sys/sockio.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#include <net/ether_slowprotocols.h>

#include <net/agr/if_agrvar_impl.h>
#include <net/agr/if_agrethervar.h>
#include <net/agr/if_agrsubr.h>

#include <net/agr/ieee8023_tlv.h>
#include <net/agr/ieee8023ad.h>
#include <net/agr/ieee8023ad_lacp.h>
#include <net/agr/ieee8023ad_lacp_impl.h>
#include <net/agr/ieee8023ad_impl.h>

static int agrether_ctor(struct agr_softc *, struct ifnet *);
static void agrether_dtor(struct agr_softc *);
static int agrether_portinit(struct agr_softc *, struct agr_port *);
static int agrether_portfini(struct agr_softc *, struct agr_port *);
static struct agr_port *agrether_select_tx_port(struct agr_softc *,
   struct mbuf *);
static int agrether_configmulti_port(struct agr_softc *, struct agr_port *,
   bool);
static int agrether_configmulti_ifreq(struct agr_softc *, struct ifreq *,
   bool);

const struct agr_iftype_ops agrether_ops = {
       .iftop_tick = NULL,
       .iftop_porttick = ieee8023ad_lacp_porttick,
       .iftop_portstate = ieee8023ad_lacp_portstate,
       .iftop_ctor = agrether_ctor,
       .iftop_dtor = agrether_dtor,
       .iftop_portinit = agrether_portinit,
       .iftop_portfini = agrether_portfini,
       .iftop_hashmbuf = agrether_hashmbuf,
       .iftop_select_tx_port = agrether_select_tx_port,
       .iftop_configmulti_port = agrether_configmulti_port,
       .iftop_configmulti_ifreq = agrether_configmulti_ifreq
};

struct agrether_private {
       struct ieee8023ad_softc aep_ieee8023ad_softc;
       struct agr_multiaddrs aep_multiaddrs;
};

struct agrether_port_private {
       struct ieee8023ad_port aepp_ieee8023ad_port;
};

static int
agrether_ctor(struct agr_softc *sc, struct ifnet *ifp_port)
{
       struct ifnet *ifp = &sc->sc_if;
       struct ethercom *ec = (void *)ifp;
       struct agrether_private *priv;

       priv = malloc(sizeof(*priv), M_DEVBUF, M_WAITOK | M_ZERO);
       agr_mc_init(sc, &priv->aep_multiaddrs);

       sc->sc_iftprivate = priv;
       /*
        * inherit ports capabilities
        * XXX this really needs to be the intersection of all
        * ports capabilities, not just the latest port.
        * Okay if ports are the same.
        */
       ifp->if_capabilities = ifp_port->if_capabilities &
                       (IFCAP_TSOv4 | IFCAP_TSOv6 |
                       IFCAP_CSUM_IPv4_Tx | IFCAP_CSUM_IPv4_Rx |
                       IFCAP_CSUM_TCPv4_Tx | IFCAP_CSUM_TCPv4_Rx |
                       IFCAP_CSUM_UDPv4_Tx | IFCAP_CSUM_UDPv4_Rx |
                       IFCAP_CSUM_TCPv6_Tx | IFCAP_CSUM_TCPv6_Rx |
                       IFCAP_CSUM_UDPv6_Tx | IFCAP_CSUM_UDPv6_Rx);

       ether_ifattach(ifp, CLLADDR(ifp_port->if_sadl));
       ec->ec_capabilities =
           ETHERCAP_VLAN_MTU | ETHERCAP_VLAN_HWTAGGING | ETHERCAP_JUMBO_MTU;

       ieee8023ad_ctor(sc);

       return 0;
}

static void
agrether_dtor(struct agr_softc *sc)
{
       struct agrether_private *priv = sc->sc_iftprivate;

       if (priv == NULL) {
               return;
       }

       ieee8023ad_dtor(sc);
       agr_mc_purgeall(sc, &priv->aep_multiaddrs);
       free(priv, M_DEVBUF);
       sc->sc_iftprivate = NULL;
}

static int
agrether_portinit(struct agr_softc *sc, struct agr_port *port)
{
       struct ifreq ifr;
       struct agrether_port_private *priv;
       int error;
       struct ethercom *ec = (void *)&sc->sc_if;
       struct ethercom *ec_port = (void *)port->port_ifp;

       port->port_media = IFM_ETHER | IFM_NONE;

       /*
        * XXX it's better to always advertise ETHERCAP_VLAN_HWTAGGING
        * and do tag insertion by ourselves if necessary,
        * so that we can mix devices with different capabilities.
        * ditto about if_capabilities.
        */

       if (ec->ec_capabilities &
           ~ec_port->ec_capabilities &
           (ETHERCAP_VLAN_MTU | ETHERCAP_VLAN_HWTAGGING)) {
               if (ec->ec_nvlans > 0) {
                       return EINVAL;
               }
               ec->ec_capabilities &=
                   ec_port->ec_capabilities |
                   ~(ETHERCAP_VLAN_MTU | ETHERCAP_VLAN_HWTAGGING);
       }

       /* Enable vlan support */
       if (ec->ec_nvlans > 0) {
               error = agr_vlan_add(port, NULL);
               if (error != 0)
                       return error;
       }
       /* XXX ETHERCAP_JUMBO_MTU */

       priv = malloc(sizeof(*priv), M_DEVBUF, M_WAITOK | M_ZERO);
       if (priv == NULL) {
               return ENOMEM;
       }

       port->port_iftprivate = priv;

       memset(&ifr, 0, sizeof(ifr));
       ifr.ifr_addr.sa_len = sizeof(ifr.ifr_addr);
       ifr.ifr_addr.sa_family = AF_UNSPEC;
       KASSERT(sizeof(ifr.ifr_addr) >=
           sizeof(ethermulticastaddr_slowprotocols));
       memcpy(&ifr.ifr_addr.sa_data,
           &ethermulticastaddr_slowprotocols,
           sizeof(ethermulticastaddr_slowprotocols));
       error = agrport_ioctl(port, SIOCADDMULTI, (void *)&ifr);
       if (error) {
               free(port->port_iftprivate, M_DEVBUF);
               port->port_iftprivate = NULL;
               return error;
       }

       ieee8023ad_portinit(port);

       return error;
}

static int
agrether_portfini(struct agr_softc *sc, struct agr_port *port)
{
       struct ifreq ifr;
       struct ethercom *ec_port = (void *)port->port_ifp;
       int error;

       if (port->port_iftprivate == NULL) {
               return 0;
       }

       if (ec_port->ec_nvlans > 0) {
               bool force = true;
               /* Disable vlan support */
               agr_vlan_del(port, &force);
       }

       memset(&ifr, 0, sizeof(ifr));
       ifr.ifr_addr.sa_len = sizeof(ifr.ifr_addr);
       ifr.ifr_addr.sa_family = AF_UNSPEC;
       KASSERT(sizeof(ifr.ifr_addr) >=
           sizeof(ethermulticastaddr_slowprotocols));
       memcpy(&ifr.ifr_addr.sa_data,
           &ethermulticastaddr_slowprotocols,
           sizeof(ethermulticastaddr_slowprotocols));
       error = agrport_ioctl(port, SIOCDELMULTI, (void *)&ifr);
       if (error) {
               return error;
       }

       ieee8023ad_portfini(port);

       free(port->port_iftprivate, M_DEVBUF);
       port->port_iftprivate = NULL;

       return error;
}

static int
agrether_configmulti_port(struct agr_softc *sc, struct agr_port *port,
   bool add)
{
       struct agrether_private *priv = sc->sc_iftprivate;

       return agr_configmulti_port(&priv->aep_multiaddrs, port, add);
}

static int
agrether_configmulti_ifreq(struct agr_softc *sc, struct ifreq *ifr,
   bool add)
{
       struct agrether_private *priv = sc->sc_iftprivate;

       return agr_configmulti_ifreq(sc, &priv->aep_multiaddrs, ifr, add);
}

/* -------------------- */

static struct agr_port *
agrether_select_tx_port(struct agr_softc *sc, struct mbuf *m)
{

       return ieee8023ad_select_tx_port(sc, m);
}

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