minix/net/lwip/eth.c

   1 /**
   2  * @file
   3  * Ethernet Interface Skeleton
   4  *
   5  */
   6
   7 /*
   8  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without modification,
  12  * are permitted provided that the following conditions are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright notice,
  15  *    this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright notice,
  17  *    this list of conditions and the following disclaimer in the documentation
  18  *    and/or other materials provided with the distribution.
  19  * 3. The name of the author 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 THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  25  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  26  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  27  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  30  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  31  * OF SUCH DAMAGE.
  32  *
  33  * This file is part of the lwIP TCP/IP stack.
  34  *
  35  * Author: Adam Dunkels <adam@sics.se>
  36  *
  37  */
  38
  39 /*
  40  * This file is a skeleton for developing Ethernet network interface
  41  * drivers for lwIP. Add code to the low_level functions and do a
  42  * search-and-replace for the word "ethernetif" to replace it with
  43  * something that better describes your network interface.
  44  */
  45
  46 #include <minix/sysutil.h>
  47 #include <minix/netsock.h>
  48
  49 #include "lwip/opt.h"
  50
  51 #include "lwip/def.h"
  52 #include "lwip/mem.h"
  53 #include "lwip/pbuf.h"
  54 #include "lwip/sys.h"
  55 #include <lwip/stats.h>
  56 #include <lwip/snmp.h>
  57 #include <netif/etharp.h>
  58
  59 #include <net/gen/ether.h>
  60 #include <net/gen/eth_io.h>
  61
  62 #include "proto.h"
  63 #include "driver.h"
  64
  65 extern endpoint_t lwip_ep;
  66
  67 static err_t low_level_output(__unused struct netif *netif, struct pbuf *pbuf)
  68 {
  69         struct nic * nic;
  70
  71         nic = (struct nic *) netif->state;
  72         assert(&nic->netif == netif);
  73
  74         debug_print("device /dev/%s", nic->name);
  75
  76         if (driver_tx_enqueue(nic, pbuf) != OK)
  77                 return ERR_MEM;
  78
  79         /* if the driver is idle, start transmitting the packet */
  80         if (nic->state == DRV_IDLE) {
  81                 if (!driver_tx(nic))
  82                         return ERR_MEM;
  83         }
  84
  85         return ERR_OK;
  86 }
  87
  88 static void low_level_init(struct netif *netif)
  89 {
  90         message m;
  91         struct nic * nic = (struct nic *) netif->state;
  92
  93         assert(nic);
  94
  95         /* set MAC hardware address length */
  96         netif->hwaddr_len = ETHARP_HWADDR_LEN;
  97
  98         /* maximum transfer unit */
  99         netif->mtu = 1500;
 100         nic->max_pkt_sz = ETH_MAX_PACK_SIZE;
 101         nic->min_pkt_sz = ETH_MIN_PACK_SIZE;
 102
 103         /* device capabilities */
 104         netif->flags = NETIF_FLAG_ETHARP;
 105
 106         m.m_net_netdrv_dl_conf.mode = DL_NOMODE;
 107         if (nic->flags & NWEO_EN_BROAD)
 108                 m.m_net_netdrv_dl_conf.mode |= DL_BROAD_REQ;
 109         if (nic->flags & NWEO_EN_MULTI)
 110                 m.m_net_netdrv_dl_conf.mode |= DL_MULTI_REQ;
 111         if (nic->flags & NWEO_EN_PROMISC)
 112                 m.m_net_netdrv_dl_conf.mode |= DL_PROMISC_REQ;
 113
 114         m.m_type = DL_CONF;
 115
 116         if (asynsend(((struct nic *)netif->state)->drv_ep , &m) != OK)
 117                 printf("LWIP : ERROR cannot send DL_CONF to driver\n");
 118 }
 119
 120
 121 err_t ethernetif_init(struct netif *netif)
 122 {
 123         /*
 124          * Initialize the snmp variables and counters inside the struct netif.
 125          * The last argument should be replaced with your link speed, in units
 126          * of bits per second.
 127         NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, LINK_SPEED_OF_YOUR_NETIF_IN_BPS);
 128          */
 129
 130         netif->output = etharp_output;
 131         netif->linkoutput = low_level_output;
 132
 133         /* initialize the hardware */
 134         low_level_init(netif);
 135
 136         return ERR_OK;
 137 }