/*      $OpenBSD: netif_of.c,v 1.9 2023/06/03 21:37:53 krw Exp $        */
/*      $NetBSD: netif_of.c,v 1.1 2000/08/20 14:58:39 mrg Exp $ */

/*
 * Copyright (C) 1995 Wolfgang Solfrank.
 * Copyright (C) 1995 TooLs GmbH.
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
 */

/*
 * Open Firmware does most of the job for interfacing to the hardware,
 * so it is easiest to just replace the netif module with
 * this adaptation to the PROM network interface.
 *
 * Note: this is based in part on sys/arch/sparc/stand/netif_sun.c
 */

#include <sys/param.h>
#include <sys/socket.h>

#include <net/if.h>

#include <netinet/in.h>
#include <netinet/if_ether.h>

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

#include "ofdev.h"
#include "openfirm.h"

static struct netif netif_of;

struct iodesc sockets[SOPEN_MAX];

struct iodesc *
socktodesc(int sock)
{
        if (sock != 0)
                return NULL;
        return sockets;
}

int
netif_open(void *machdep_hint)
{
        struct of_dev *op = machdep_hint;
        struct iodesc *io;

        DNPRINTF(BOOT_D_OFNET, "netif_open...");

        /* find a free socket */
        io = sockets;
        if (io->io_netif) {
                DNPRINTF(BOOT_D_OFNET, "device busy\n");
                errno = ENFILE;
                return -1;
        }
        bzero(io, sizeof *io);

        netif_of.nif_devdata = op;
        io->io_netif = &netif_of;

        /* Put our ethernet address in io->myea */
        OF_getprop(OF_instance_to_package(op->handle),
                   "mac-address", io->myea, sizeof io->myea);

        DNPRINTF(BOOT_D_OFNET, "OK\n");
        return 0;
}

int
netif_close(int fd)
{
        struct iodesc *io;
        struct netif *ni;

        DNPRINTF(BOOT_D_OFNET, "netif_close(%x)...", fd);

        if (fd != 0) {
                DNPRINTF(BOOT_D_OFNET, "EBADF\n");
                errno = EBADF;
                return -1;
        }

        io = &sockets[fd];
        ni = io->io_netif;
        if (ni != NULL) {
                ni->nif_devdata = NULL;
                io->io_netif = NULL;
        }

        DNPRINTF(BOOT_D_OFNET, "OK\n");
        return 0;
}

/*
 * Send a packet.  The ether header is already there.
 * Return the length sent (or -1 on error).
 */
ssize_t
netif_put(struct iodesc *desc, void *pkt, size_t len)
{
        struct of_dev *op;
        ssize_t rv;
        size_t sendlen;

        op = desc->io_netif->nif_devdata;

        DNPRINTF(BOOT_D_OFNET, "netif_put: desc=0x%x pkt=0x%x len=%d\n",
            desc, pkt, len);
        DNPRINTF(BOOT_D_OFNET, "dst: %s, src: %s, type: 0x%x\n",
            ether_sprintf(((struct ether_header *)pkt)->ether_dhost),
            ether_sprintf(((struct ether_header *)pkt)->ether_shost),
            ((struct ether_header *)pkt)->ether_type & 0xFFFF);

        sendlen = len;
        if (sendlen < 60) {
                sendlen = 60;
                DNPRINTF(BOOT_D_OFNET, "netif_put: length padded to %d\n",
                    sendlen);
        }

        rv = OF_write(op->handle, pkt, sendlen);

        DNPRINTF(BOOT_D_OFNET, "netif_put: xmit returned %d\n", rv);

        return rv;
}

/*
 * Receive a packet, including the ether header.
 * Return the total length received (or -1 on error).
 */
ssize_t
netif_get(struct iodesc *desc, void *pkt, size_t maxlen, time_t timo)
{
        struct of_dev *op;
        int tick0, tmo_ms;
        int len;

        op = desc->io_netif->nif_devdata;

        DNPRINTF(BOOT_D_OFNET, "netif_get: pkt=0x%x, maxlen=%d, tmo=%d\n",
            pkt, maxlen, timo);

        tmo_ms = timo * 1000;
        tick0 = OF_milliseconds();

        do {
                len = OF_read(op->handle, pkt, maxlen);
        } while ((len == -2 || len == 0) &&
                 (OF_milliseconds() - tick0 < tmo_ms));

        DNPRINTF(BOOT_D_OFNET, "netif_get: received len=%d\n", len);

        if (len < 12)
                return -1;

        DNPRINTF(BOOT_D_OFNET, "dst: %s, src: %s, type: 0x%x\n",
            ether_sprintf(((struct ether_header *)pkt)->ether_dhost),
            ether_sprintf(((struct ether_header *)pkt)->ether_shost),
            ((struct ether_header *)pkt)->ether_type & 0xFFFF);

        return len;
}

/*
 * Shouldn't really be here, but is used solely for networking, so...
 */
time_t
getsecs(void)
{
        return OF_milliseconds() / 1000;
}