summaryrefslogtreecommitdiff
path: root/drivers/isdn/hysdn/hysdn_net.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/isdn/hysdn/hysdn_net.c')
-rw-r--r--drivers/isdn/hysdn/hysdn_net.c326
1 files changed, 0 insertions, 326 deletions
diff --git a/drivers/isdn/hysdn/hysdn_net.c b/drivers/isdn/hysdn/hysdn_net.c
deleted file mode 100644
index 8e9c34f33d86..000000000000
--- a/drivers/isdn/hysdn/hysdn_net.c
+++ /dev/null
@@ -1,326 +0,0 @@
-/* $Id: hysdn_net.c,v 1.8.6.4 2001/09/23 22:24:54 kai Exp $
- *
- * Linux driver for HYSDN cards, net (ethernet type) handling routines.
- *
- * Author Werner Cornelius (werner@titro.de) for Hypercope GmbH
- * Copyright 1999 by Werner Cornelius (werner@titro.de)
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- * This net module has been inspired by the skeleton driver from
- * Donald Becker (becker@CESDIS.gsfc.nasa.gov)
- *
- */
-
-#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/kernel.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/inetdevice.h>
-
-#include "hysdn_defs.h"
-
-unsigned int hynet_enable = 0xffffffff;
-module_param(hynet_enable, uint, 0);
-
-#define MAX_SKB_BUFFERS 20 /* number of buffers for keeping TX-data */
-
-/****************************************************************************/
-/* structure containing the complete network data. The structure is aligned */
-/* in a way that both, the device and statistics are kept inside it. */
-/* for proper access, the device structure MUST be the first var/struct */
-/* inside the definition. */
-/****************************************************************************/
-struct net_local {
- /* Tx control lock. This protects the transmit buffer ring
- * state along with the "tx full" state of the driver. This
- * means all netif_queue flow control actions are protected
- * by this lock as well.
- */
- struct net_device *dev;
- spinlock_t lock;
- struct sk_buff *skbs[MAX_SKB_BUFFERS]; /* pointers to tx-skbs */
- int in_idx, out_idx; /* indexes to buffer ring */
- int sk_count; /* number of buffers currently in ring */
-}; /* net_local */
-
-
-
-/*********************************************************************/
-/* Open/initialize the board. This is called (in the current kernel) */
-/* sometime after booting when the 'ifconfig' program is run. */
-/* This routine should set everything up anew at each open, even */
-/* registers that "should" only need to be set once at boot, so that */
-/* there is non-reboot way to recover if something goes wrong. */
-/*********************************************************************/
-static int
-net_open(struct net_device *dev)
-{
- struct in_device *in_dev;
- hysdn_card *card = dev->ml_priv;
- int i;
-
- netif_start_queue(dev); /* start tx-queueing */
-
- /* Fill in the MAC-level header (if not already set) */
- if (!card->mac_addr[0]) {
- for (i = 0; i < ETH_ALEN; i++)
- dev->dev_addr[i] = 0xfc;
- if ((in_dev = dev->ip_ptr) != NULL) {
- struct in_ifaddr *ifa = in_dev->ifa_list;
- if (ifa != NULL)
- memcpy(dev->dev_addr + (ETH_ALEN - sizeof(ifa->ifa_local)), &ifa->ifa_local, sizeof(ifa->ifa_local));
- }
- } else
- memcpy(dev->dev_addr, card->mac_addr, ETH_ALEN);
-
- return (0);
-} /* net_open */
-
-/*******************************************/
-/* flush the currently occupied tx-buffers */
-/* must only be called when device closed */
-/*******************************************/
-static void
-flush_tx_buffers(struct net_local *nl)
-{
-
- while (nl->sk_count) {
- dev_kfree_skb(nl->skbs[nl->out_idx++]); /* free skb */
- if (nl->out_idx >= MAX_SKB_BUFFERS)
- nl->out_idx = 0; /* wrap around */
- nl->sk_count--;
- }
-} /* flush_tx_buffers */
-
-
-/*********************************************************************/
-/* close/decativate the device. The device is not removed, but only */
-/* deactivated. */
-/*********************************************************************/
-static int
-net_close(struct net_device *dev)
-{
-
- netif_stop_queue(dev); /* disable queueing */
-
- flush_tx_buffers((struct net_local *) dev);
-
- return (0); /* success */
-} /* net_close */
-
-/************************************/
-/* send a packet on this interface. */
-/* new style for kernel >= 2.3.33 */
-/************************************/
-static netdev_tx_t
-net_send_packet(struct sk_buff *skb, struct net_device *dev)
-{
- struct net_local *lp = (struct net_local *) dev;
-
- spin_lock_irq(&lp->lock);
-
- lp->skbs[lp->in_idx++] = skb; /* add to buffer list */
- if (lp->in_idx >= MAX_SKB_BUFFERS)
- lp->in_idx = 0; /* wrap around */
- lp->sk_count++; /* adjust counter */
- netif_trans_update(dev);
-
- /* If we just used up the very last entry in the
- * TX ring on this device, tell the queueing
- * layer to send no more.
- */
- if (lp->sk_count >= MAX_SKB_BUFFERS)
- netif_stop_queue(dev);
-
- /* When the TX completion hw interrupt arrives, this
- * is when the transmit statistics are updated.
- */
-
- spin_unlock_irq(&lp->lock);
-
- if (lp->sk_count <= 3) {
- schedule_work(&((hysdn_card *) dev->ml_priv)->irq_queue);
- }
- return NETDEV_TX_OK; /* success */
-} /* net_send_packet */
-
-
-
-/***********************************************************************/
-/* acknowlegde a packet send. The network layer will be informed about */
-/* completion */
-/***********************************************************************/
-void
-hysdn_tx_netack(hysdn_card *card)
-{
- struct net_local *lp = card->netif;
-
- if (!lp)
- return; /* non existing device */
-
-
- if (!lp->sk_count)
- return; /* error condition */
-
- lp->dev->stats.tx_packets++;
- lp->dev->stats.tx_bytes += lp->skbs[lp->out_idx]->len;
-
- dev_kfree_skb(lp->skbs[lp->out_idx++]); /* free skb */
- if (lp->out_idx >= MAX_SKB_BUFFERS)
- lp->out_idx = 0; /* wrap around */
-
- if (lp->sk_count-- == MAX_SKB_BUFFERS) /* dec usage count */
- netif_start_queue((struct net_device *) lp);
-} /* hysdn_tx_netack */
-
-/*****************************************************/
-/* we got a packet from the network, go and queue it */
-/*****************************************************/
-void
-hysdn_rx_netpkt(hysdn_card *card, unsigned char *buf, unsigned short len)
-{
- struct net_local *lp = card->netif;
- struct net_device *dev;
- struct sk_buff *skb;
-
- if (!lp)
- return; /* non existing device */
-
- dev = lp->dev;
- dev->stats.rx_bytes += len;
-
- skb = dev_alloc_skb(len);
- if (skb == NULL) {
- printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
- dev->name);
- dev->stats.rx_dropped++;
- return;
- }
- /* copy the data */
- skb_put_data(skb, buf, len);
-
- /* determine the used protocol */
- skb->protocol = eth_type_trans(skb, dev);
-
- dev->stats.rx_packets++; /* adjust packet count */
-
- netif_rx(skb);
-} /* hysdn_rx_netpkt */
-
-/*****************************************************/
-/* return the pointer to a network packet to be send */
-/*****************************************************/
-struct sk_buff *
-hysdn_tx_netget(hysdn_card *card)
-{
- struct net_local *lp = card->netif;
-
- if (!lp)
- return (NULL); /* non existing device */
-
- if (!lp->sk_count)
- return (NULL); /* nothing available */
-
- return (lp->skbs[lp->out_idx]); /* next packet to send */
-} /* hysdn_tx_netget */
-
-static const struct net_device_ops hysdn_netdev_ops = {
- .ndo_open = net_open,
- .ndo_stop = net_close,
- .ndo_start_xmit = net_send_packet,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-
-/*****************************************************************************/
-/* hysdn_net_create creates a new net device for the given card. If a device */
-/* already exists, it will be deleted and created a new one. The return value */
-/* 0 announces success, else a negative error code will be returned. */
-/*****************************************************************************/
-int
-hysdn_net_create(hysdn_card *card)
-{
- struct net_device *dev;
- int i;
- struct net_local *lp;
-
- if (!card) {
- printk(KERN_WARNING "No card-pt in hysdn_net_create!\n");
- return (-ENOMEM);
- }
- hysdn_net_release(card); /* release an existing net device */
-
- dev = alloc_etherdev(sizeof(struct net_local));
- if (!dev) {
- printk(KERN_WARNING "HYSDN: unable to allocate mem\n");
- return (-ENOMEM);
- }
-
- lp = netdev_priv(dev);
- lp->dev = dev;
-
- dev->netdev_ops = &hysdn_netdev_ops;
- spin_lock_init(&((struct net_local *) dev)->lock);
-
- /* initialise necessary or informing fields */
- dev->base_addr = card->iobase; /* IO address */
- dev->irq = card->irq; /* irq */
-
- dev->netdev_ops = &hysdn_netdev_ops;
- if ((i = register_netdev(dev))) {
- printk(KERN_WARNING "HYSDN: unable to create network device\n");
- free_netdev(dev);
- return (i);
- }
- dev->ml_priv = card; /* remember pointer to own data structure */
- card->netif = dev; /* setup the local pointer */
-
- if (card->debug_flags & LOG_NET_INIT)
- hysdn_addlog(card, "network device created");
- return (0); /* and return success */
-} /* hysdn_net_create */
-
-/***************************************************************************/
-/* hysdn_net_release deletes the net device for the given card. The return */
-/* value 0 announces success, else a negative error code will be returned. */
-/***************************************************************************/
-int
-hysdn_net_release(hysdn_card *card)
-{
- struct net_device *dev = card->netif;
-
- if (!dev)
- return (0); /* non existing */
-
- card->netif = NULL; /* clear out pointer */
- net_close(dev);
-
- flush_tx_buffers((struct net_local *) dev); /* empty buffers */
-
- unregister_netdev(dev); /* release the device */
- free_netdev(dev); /* release the memory allocated */
- if (card->debug_flags & LOG_NET_INIT)
- hysdn_addlog(card, "network device deleted");
-
- return (0); /* always successful */
-} /* hysdn_net_release */
-
-/*****************************************************************************/
-/* hysdn_net_getname returns a pointer to the name of the network interface. */
-/* if the interface is not existing, a "-" is returned. */
-/*****************************************************************************/
-char *
-hysdn_net_getname(hysdn_card *card)
-{
- struct net_device *dev = card->netif;
-
- if (!dev)
- return ("-"); /* non existing */
-
- return (dev->name);
-} /* hysdn_net_getname */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 17:15:54 +0000