text: /*	$OpenBSD: netif_of.c,v 1.4 2003/10/16 04:30:09 drahn Exp $	*/
  /*	$NetBSD: netif_of.c,v 1.1 1997/04/16 20:29:19 thorpej 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>
  
  #if 0			/* XXX thorpej */
  #include <string.h>
  #include <time.h>
  #endif
  
  #include <net/if.h>
  
  #include <netinet/in.h>
  #include <netinet/if_ether.h>
  #include <netinet/in_systm.h>
  
  #include <lib/libsa/stand.h>
  #include <lib/libsa/net.h>
  #include <lib/libsa/netif.h>
  
  #include <macppc/stand/ofdev.h>
  #include <macppc/stand/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;
  	int fd, error;
  	char addr[32];
  
  #ifdef	NETIF_DEBUG
  	printf("netif_open...");
  #endif
  	/* find a free socket */
  	io = sockets;
  	if (io->io_netif) {
  #ifdef	NETIF_DEBUG
  		printf("device busy\n");
  #endif
  		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),
  		   "local-mac-address", io->myea, sizeof io->myea) == -1 &&
  	OF_getprop(OF_instance_to_package(op->handle),
  		   "mac-address", io->myea, sizeof io->myea);
  
  #ifdef	NETIF_DEBUG
  	printf("OK\n");
  #endif
  	return 0;
  }
  
  int
  netif_close(int fd)
  {
  	struct iodesc *io;
  	struct netif *ni;
  
  #ifdef	NETIF_DEBUG
  	printf("netif_close(%x)...", fd);
  #endif
  	if (fd != 0) {
  #ifdef	NETIF_DEBUG
  		printf("EBADF\n");
  #endif
  		errno = EBADF;
  		return -1;
  	}
  
  	io = &sockets[fd];
  	ni = io->io_netif;
  	if (ni != NULL) {
  		ni->nif_devdata = NULL;
  		io->io_netif = NULL;
  	}
  #ifdef	NETIF_DEBUG
  	printf("OK\n");
  #endif
  	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;
  
  #ifdef	NETIF_DEBUG
  	{
  		struct ether_header *eh;
  
  		printf("netif_put: desc=0x%x pkt=0x%x len=%d\n",
  		       desc, pkt, len);
  		eh = pkt;
  		printf("dst: %s ", ether_sprintf(eh->ether_dhost));
  		printf("src: %s ", ether_sprintf(eh->ether_shost));
  		printf("type: 0x%x\n", eh->ether_type & 0xFFFF);
  	}
  #endif
  
  	sendlen = len;
  	if (sendlen < 60) {
  		sendlen = 60;
  #ifdef	NETIF_DEBUG
  		printf("netif_put: length padded to %d\n", sendlen);
  #endif
  	}
  
  	if (op->dmabuf) {
  		bcopy(pkt, op->dmabuf, sendlen);
  		pkt = op->dmabuf;
  	}
  	rv = OF_write(op->handle, pkt, sendlen);
  
  #ifdef	NETIF_DEBUG
  	printf("netif_put: xmit returned %d\n", rv);
  #endif
  
  	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;
  
  #ifdef	NETIF_DEBUG
  	printf("netif_get: pkt=0x%x, maxlen=%d, tmo=%d\n",
  	   pkt, maxlen, timo);
  #endif
  
  	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));
  
  #ifdef	NETIF_DEBUG
  	printf("netif_get: received len=%d\n", len);
  #endif
  
  	if (len < 12)
  		return -1;
  
  #ifdef	NETIF_DEBUG
  	{
  		struct ether_header *eh = pkt;
  
  		printf("dst: %s ", ether_sprintf(eh->ether_dhost));
  		printf("src: %s ", ether_sprintf(eh->ether_shost));
  		printf("type: 0x%x\n", eh->ether_type & 0xFFFF);
  	}
  #endif
  
  	return len;
  }
  
  /*
   * Shouldn't really be here, but is used solely for networking, so...
   */
  time_t
  getsecs()
  {
  	return OF_milliseconds() / 1000;
  }
  