sys/arch/ofppc/stand/ofwboot/net.c

   1 /*      $NetBSD: net.c,v 1.5 2003/03/13 15:36:06 drochner Exp $ */
   2
   3 /*
   4  * Copyright (C) 1995 Wolfgang Solfrank.
   5  * Copyright (C) 1995 TooLs GmbH.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by TooLs GmbH.
  19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * This module implements a "raw device" interface suitable for
  36  * use by the stand-alone I/O library NFS code.  This interface
  37  * does not support any "block" access, and exists only for the
  38  * purpose of initializing the network interface, getting boot
  39  * parameters, and performing the NFS mount.
  40  *
  41  * At open time, this does:
  42  *
  43  * find interface       - netif_of_open()
  44  * BOOTP                - bootp()
  45  * RPC/mountd           - nfs_mount()
  46  *
  47  * The root file handle from mountd is saved in a global
  48  * for use by the NFS open code (NFS/lookup).
  49  *
  50  * Note: this is based in part on sys/arch/sparc/stand/net.c
  51  */
  52
  53 #include "net.h"
  54
  55 #include <sys/param.h>
  56 #include <sys/socket.h>
  57
  58 #include <net/if.h>
  59 #include <netinet/in.h>
  60 #include <netinet/in_systm.h>
  61
  62 #include <lib/libsa/stand.h>
  63 #include <lib/libsa/bootp.h>
  64 #include <lib/libsa/net.h>
  65 #include <lib/libsa/nfs.h>
  66
  67 #include <lib/libkern/libkern.h>
  68
  69 #include "ofdev.h"
  70 #include "netif_of.h"
  71
  72 char    rootpath[FNAME_SIZE];
  73
  74 static  int netdev_sock = -1;
  75 static  int open_count;
  76
  77 static int net_mountroot(void);
  78
  79 /*
  80  * Called by devopen after it sets f->f_dev to our devsw entry.
  81  * This opens the low-level device and sets f->f_devdata.
  82  */
  83 int
  84 net_open(struct of_dev *op)
  85 {
  86         int error = 0;
  87
  88         /*
  89          * On first open, do netif open, mount, etc.
  90          */
  91         if (open_count == 0) {
  92                 /* Find network interface. */
  93                 if ((netdev_sock = netif_of_open(op)) < 0) {
  94                         error = errno;
  95                         goto bad;
  96                 }
  97                 if ((error = net_mountroot()) != 0)
  98                         goto bad;
  99         }
 100         open_count++;
 101 bad:
 102         if (netdev_sock >= 0 && open_count == 0) {
 103                 netif_of_close(netdev_sock);
 104                 netdev_sock = -1;
 105         }
 106         return error;
 107 }
 108
 109 int
 110 net_close(struct of_dev *op)
 111 {
 112         /*
 113          * On last close, do netif close, etc.
 114          */
 115         if (open_count > 0)
 116                 if (--open_count == 0) {
 117                         netif_of_close(netdev_sock);
 118                         netdev_sock = -1;
 119                 }
 120
 121         return 0;
 122 }
 123
 124 static int
 125 net_mountroot(void)
 126 {
 127
 128 #ifdef  DEBUG
 129         printf("net_mountroot\n");
 130 #endif
 131
 132         /*
 133          * Get info for NFS boot: our IP address, out hostname,
 134          * server IP address, and our root path on the server.
 135          * We use BOOTP (RFC951, RFC1532) exclusively as mandated
 136          * by PowerPC Reference Platform Specification I.4.2
 137          */
 138
 139         bootp(netdev_sock);
 140
 141         if (myip.s_addr == 0)
 142                 return ETIMEDOUT;
 143
 144         printf("Using IP address: %s\n", inet_ntoa(myip));
 145
 146 #ifdef  DEBUG
 147         printf("myip: %s (%s)", hostname, inet_ntoa(myip));
 148         if (gateip.s_addr)
 149                 printf(", gateip: %s", inet_ntoa(gateip));
 150         if (netmask)
 151                 printf(", netmask: %s", intoa(netmask));
 152         printf("\n");
 153 #endif
 154         printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
 155
 156         /*
 157          * Get the NFS file handle (mount).
 158          */
 159         if (nfs_mount(netdev_sock, rootip, rootpath) < 0)
 160                 return errno;
 161         return 0;
 162 }