/*      $NetBSD: efinet.c,v 1.8 2018/08/18 15:55:19 kre Exp $   */

/*-
 * Copyright (c) 2001 Doug Rabson
 * 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>
/* __FBSDID("$FreeBSD: src/sys/boot/efi/libefi/efinet.c,v 1.6 2004/01/04 23:28:16 obrien Exp $"); */

#include <sys/param.h>

#include <lib/libsa/stand.h>
#include <lib/libsa/loadfile.h>
#include <lib/libsa/net.h>
#include <lib/libsa/netif.h>

#ifdef EFINET_DEBUG
#include <lib/libsa/ether_sprintf.c>
#endif

#include <efi.h>
#include <efilib.h>

extern struct netif_driver efi_net;

int  efinet_match(struct netif *, void *);
int  efinet_probe(struct netif *, void *);
void efinet_init(struct iodesc *, void *);
int  efinet_get(struct iodesc *, void *, size_t, saseconds_t);
int  efinet_put(struct iodesc *, void *, size_t);
void efinet_end(struct netif *);

struct netif_driver efi_net = {
        "net",                  /* netif_bname */
        efinet_match,           /* netif_match */
        efinet_probe,           /* netif_probe */
        efinet_init,            /* netif_init */
        efinet_get,             /* netif_get */
        efinet_put,             /* netif_put */
        efinet_end,             /* netif_end */
        0,                      /* netif_ifs */
        0                       /* netif_nifs */
};

#ifdef EFINET_DEBUG
static void
dump_mode(EFI_SIMPLE_NETWORK_MODE *mode)
{
        int i;

        printf("State                 = %x\n", mode->State);
        printf("HwAddressSize         = %u\n", mode->HwAddressSize);
        printf("MediaHeaderSize       = %u\n", mode->MediaHeaderSize);
        printf("MaxPacketSize         = %u\n", mode->MaxPacketSize);
        printf("NvRamSize             = %u\n", mode->NvRamSize);
        printf("NvRamAccessSize       = %u\n", mode->NvRamAccessSize);
        printf("ReceiveFilterMask     = %x\n", mode->ReceiveFilterMask);
        printf("ReceiveFilterSetting  = %u\n", mode->ReceiveFilterSetting);
        printf("MaxMCastFilterCount   = %u\n", mode->MaxMCastFilterCount);
        printf("MCastFilterCount      = %u\n", mode->MCastFilterCount);
        printf("MCastFilter           = {");
        for (i = 0; i < mode->MCastFilterCount; i++)
                printf(" %s", ether_sprintf(mode->MCastFilter[i].Addr));
        printf(" }\n");
        printf("CurrentAddress        = %s\n",
            ether_sprintf(mode->CurrentAddress.Addr));
        printf("BroadcastAddress      = %s\n",
            ether_sprintf(mode->BroadcastAddress.Addr));
        printf("PermanentAddress      = %s\n",
            ether_sprintf(mode->PermanentAddress.Addr));
        printf("IfType                = %u\n", mode->IfType);
        printf("MacAddressChangeable  = %d\n", mode->MacAddressChangeable);
        printf("MultipleTxSupported   = %d\n", mode->MultipleTxSupported);
        printf("MediaPresentSupported = %d\n", mode->MediaPresentSupported);
        printf("MediaPresent          = %d\n", mode->MediaPresent);
}
#endif

int
efinet_match(struct netif *nif, void *machdep_hint)
{

        return (1);
}

int
efinet_probe(struct netif *nif, void *machdep_hint)
{

        return (0);
}

int
efinet_put(struct iodesc *desc, void *pkt, size_t len)
{
        struct netif *nif = desc->io_netif;
        EFI_SIMPLE_NETWORK *net;
        EFI_STATUS status;
        void *buf;

        net = nif->nif_devdata;

        status = net->Transmit(net, 0, len, pkt, 0, 0, 0);
        if (status != EFI_SUCCESS)
                return -1;

        /* Wait for the buffer to be transmitted */
        do {
                buf = 0;        /* XXX Is this needed? */
                status = net->GetStatus(net, 0, &buf);
                /*
                 * XXX EFI1.1 and the E1000 card returns a different 
                 * address than we gave.  Sigh.
                 */
        } while (status == EFI_SUCCESS && buf == 0);

        /* XXX How do we deal with status != EFI_SUCCESS now? */
        return (status == EFI_SUCCESS) ? len : -1;
}


int
efinet_get(struct iodesc *desc, void *pkt, size_t len, saseconds_t timeout)
{
        struct netif *nif = desc->io_netif;
        EFI_SIMPLE_NETWORK *net;
        EFI_STATUS status;
        UINTN bufsz;
        time_t t;
        char buf[2048];

        net = nif->nif_devdata;

        t = time(0);
        while ((time(0) - t) < timeout) {
                bufsz = sizeof(buf);
                status = net->Receive(net, 0, &bufsz, buf, 0, 0, 0);
                if (status == EFI_SUCCESS) {
                        /*
                         * XXX EFI1.1 and the E1000 card trash our
                         * workspace if we do not do this silly copy.
                         * Either they are not respecting the len
                         * value or do not like the alignment.
                         */
                        if (bufsz > len)
                                bufsz = len;
                        memcpy(pkt, buf, bufsz);
                        return bufsz;
                }
                if (status != EFI_NOT_READY)
                        return 0;
        }

        return 0;
}

void
efinet_init(struct iodesc *desc, void *machdep_hint)
{
        struct netif *nif = desc->io_netif;
        EFI_SIMPLE_NETWORK *net;
        EFI_STATUS status;

        net = nif->nif_driver->netif_ifs[nif->nif_unit].dif_private;
        nif->nif_devdata = net;

        if (net->Mode->State == EfiSimpleNetworkStopped) {
                status = net->Start(net);
                if (status != EFI_SUCCESS) {
                        printf("net%d: cannot start interface (status=%ld)\n",
                            nif->nif_unit, status);
                        return;
                }
        }

        if (net->Mode->State != EfiSimpleNetworkInitialized) {
                status = net->Initialize(net, 0, 0);
                if (status != EFI_SUCCESS) {
                        printf("net%d: cannot init. interface (status=%ld)\n",
                            nif->nif_unit, status);
                        return;
                }
        }

        if (net->Mode->ReceiveFilterSetting == 0) {
                UINT32 mask = EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
                    EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST;

                status = net->ReceiveFilters(net, mask, 0, FALSE, 0, 0);
                if (status != EFI_SUCCESS) {
                        printf("net%d: cannot set rx. filters (status=%ld)\n",
                            nif->nif_unit, status);
                        return;
                }
        }

#ifdef EFINET_DEBUG
        dump_mode(net->Mode);
#endif

        memcpy(desc->myea, net->Mode->CurrentAddress.Addr, 6);
        desc->xid = 1;

        return;
}

void
efinet_init_driver(void)
{
        EFI_STATUS      status;
        UINTN           sz;
        static EFI_GUID netid = EFI_SIMPLE_NETWORK_PROTOCOL_GUID;
        EFI_HANDLE      *handles;
        int             nifs, i;
#define MAX_INTERFACES  4
        static struct netif_dif difs[MAX_INTERFACES];
        static struct netif_stats stats[MAX_INTERFACES];

        sz = 0;
        status = BS->LocateHandle(ByProtocol, &netid, 0, &sz, 0);
        if (status != EFI_BUFFER_TOO_SMALL)
                return;
        handles = (EFI_HANDLE *) alloc(sz);
        status = BS->LocateHandle(ByProtocol, &netid, 0, &sz, handles);
        if (EFI_ERROR(status)) {
                free(handles);
                return;
        }

        nifs = sz / sizeof(EFI_HANDLE);
        if (nifs > MAX_INTERFACES)
                nifs = MAX_INTERFACES;

        efi_net.netif_nifs = nifs;
        efi_net.netif_ifs = difs;

        memset(stats, 0, sizeof(stats));
        for (i = 0; i < nifs; i++) {
                struct netif_dif *dif = &efi_net.netif_ifs[i];
                dif->dif_unit = i;
                dif->dif_nsel = 1;
                dif->dif_stats = &stats[i];

                BS->HandleProtocol(handles[i], &netid,
                                   (VOID**) &dif->dif_private);
        }

        return;
}

void
efinet_end(struct netif *nif)
{
        EFI_SIMPLE_NETWORK *net = nif->nif_devdata;

        net->Shutdown(net);
}