A working user-level pcnet32 driver.user-level_pcnet32

1 files changed, 450 insertions, 0 deletions

diff --git a/pcnet32/net_init.c b/pcnet32/net_init.c
new file mode 100644
index 000000000..f375c2ab0
--- /dev/null
+++ b/pcnet32/net_init.c
@@ -0,0 +1,450 @@
+/* netdrv_init.c: Initialization for network devices. */
+/*
+	Written 1993,1994,1995 by Donald Becker.
+
+	The author may be reached as becker@cesdis.gsfc.nasa.gov or
+	C/O Center of Excellence in Space Data and Information Sciences
+		Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
+
+	This file contains the initialization for the "pl14+" style ethernet
+	drivers.  It should eventually replace most of drivers/net/Space.c.
+	It's primary advantage is that it's able to allocate low-memory buffers.
+	A secondary advantage is that the dangerous NE*000 netcards can reserve
+	their I/O port region before the SCSI probes start.
+
+	Modifications/additions by Bjorn Ekwall <bj0rn@blox.se>:
+		ethdev_index[MAX_ETH_CARDS]
+		register_netdev() / unregister_netdev()
+		
+	Modifications by Wolfgang Walter
+		Use dev_close cleanly so we always shut things down tidily.
+		
+	Changed 29/10/95, Alan Cox to pass sockaddr's around for mac addresses.
+	
+	14/06/96 - Paul Gortmaker:	Add generic eth_change_mtu() function.
+
+	August 12, 1996 - Lawrence V. Stefani: Added fddi_change_mtu() and
+					  fddi_setup() functions.
+	Sept. 10, 1996  - Lawrence V. Stefani: Increased hard_header_len to
+					  include 3 pad bytes.
+*/
+
+/* The network devices currently exist only in the socket namespace, so these
+   entries are unused.  The only ones that make sense are
+    open	start the ethercard
+    close	stop  the ethercard
+    ioctl	To get statistics, perhaps set the interface port (AUI, BNC, etc.)
+   One can also imagine getting raw packets using
+    read & write
+   but this is probably better handled by a raw packet socket.
+
+   Given that almost all of these functions are handled in the current
+   socket-based scheme, putting ethercard devices in /dev/ seems pointless.
+   
+   [Removed all support for /dev network devices. When someone adds
+    streams then by magic we get them, but otherwise they are un-needed
+	and a space waste]
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+
+#include "if.h"
+#include "if_arp.h"
+#include "if_ether.h"
+#include "netdevice.h"
+#include "util.h"
+
+/* The list of used and available "eth" slots (for "eth0", "eth1", etc.) */
+#define MAX_ETH_CARDS 16 /* same as the number if irq's in irq2dev[] */
+static struct device *ethdev_index[MAX_ETH_CARDS];
+
+struct device *dev_base;
+
+struct port_class *intr_class;
+struct port_bucket *irq_port_bucket;
+
+
+/* Fill in the fields of the device structure with ethernet-generic values.
+
+   If no device structure is passed, a new one is constructed, complete with
+   a SIZEOF_PRIVATE private data area.
+
+   If an empty string area is passed as dev->name, or a new structure is made,
+   a new name string is constructed.  The passed string area should be 8 bytes
+   long.
+ */
+
+struct device *
+init_etherdev(struct device *dev, int sizeof_priv)
+{
+	int new_device = 0;
+	int i;
+
+	/* Use an existing correctly named device in Space.c:dev_base. */
+	if (dev == NULL) {
+		int alloc_size = sizeof(struct device) + sizeof("eth%d  ")
+			+ sizeof_priv + 3;
+		struct device *cur_dev;
+		char pname[8];		/* Putative name for the device.  */
+
+		for (i = 0; i < MAX_ETH_CARDS; ++i)
+			if (ethdev_index[i] == NULL) {
+				sprintf(pname, "eth%d", i);
+				for (cur_dev = dev_base; cur_dev; cur_dev = cur_dev->next)
+					if (strcmp(pname, cur_dev->name) == 0) {
+						dev = cur_dev;
+						dev->init = NULL;
+						sizeof_priv = (sizeof_priv + 3) & ~3;
+						dev->priv = sizeof_priv
+							  ? malloc(sizeof_priv)
+							  :	NULL;
+						if (dev->priv) memset(dev->priv, 0, sizeof_priv);
+						goto found;
+					}
+			}
+
+		alloc_size &= ~3;		/* Round to dword boundary. */
+
+		ports_create_port (intr_class, irq_port_bucket,
+				   sizeof (struct port_info) + alloc_size, &dev);
+		memset(((struct port_info *) dev) + 1, 0, alloc_size);
+		if (sizeof_priv)
+			dev->priv = (void *) (dev + 1);
+		dev->name = sizeof_priv + (char *)(dev + 1);
+		new_device = 1;
+	}
+
+	found:						/* From the double loop above. */
+
+	if (dev->name &&
+		((dev->name[0] == '\0') || (dev->name[0] == ' '))) {
+		for (i = 0; i < MAX_ETH_CARDS; ++i)
+			if (ethdev_index[i] == NULL) {
+				sprintf(dev->name, "eth%d", i);
+				debug ("setup device %s", dev->name);
+				ethdev_index[i] = dev;
+				break;
+			}
+	}
+
+	ether_setup(dev); 	/* Hmmm, should this be called here? */
+	
+	if (new_device) {
+		/* Append the device to the device queue. */
+		struct device **old_devp = &dev_base;
+		if (*old_devp == NULL)
+			*old_devp = dev;
+		while ((*old_devp)->next)
+			old_devp = & (*old_devp)->next;
+		(*old_devp)->next = dev;
+		dev->next = 0;
+	}
+	return dev;
+}
+
+
+//static int eth_mac_addr(struct device *dev, void *p)
+//{
+//	struct sockaddr *addr=p;
+//	if(dev->start)
+//		return -EBUSY;
+//	memcpy(dev->dev_addr, addr->sa_data,dev->addr_len);
+//	return 0;
+//}
+//
+//static int eth_change_mtu(struct device *dev, int new_mtu)
+//{
+//	if ((new_mtu < 68) || (new_mtu > 1500))
+//		return -EINVAL;
+//	dev->mtu = new_mtu;
+//	return 0;
+//}
+
+#ifdef CONFIG_FDDI
+
+static int fddi_change_mtu(struct device *dev, int new_mtu)
+{
+	if ((new_mtu < FDDI_K_SNAP_HLEN) || (new_mtu > FDDI_K_SNAP_DLEN))
+		return(-EINVAL);
+	dev->mtu = new_mtu;
+	return(0);
+}
+
+#endif
+
+void ether_setup(struct device *dev)
+{
+	int i;
+	/* Fill in the fields of the device structure with ethernet-generic values.
+	   This should be in a common file instead of per-driver.  */
+	for (i = 0; i < DEV_NUMBUFFS; i++)
+		skb_queue_head_init(&dev->buffs[i]);
+
+	/* register boot-defined "eth" devices */
+	if (dev->name && (strncmp(dev->name, "eth", 3) == 0)) {
+//		i = simple_strtoul(dev->name + 3, NULL, 0);
+		i = strtoul(dev->name + 3, NULL, 0);
+		if (ethdev_index[i] == NULL) {
+			ethdev_index[i] = dev;
+		}
+		else if (dev != ethdev_index[i]) {
+			/* Really shouldn't happen! */
+#ifdef MACH
+			panic("ether_setup: Ouch! Someone else took %s\n",
+				dev->name);
+#else
+			printk("ether_setup: Ouch! Someone else took %s\n",
+				dev->name);
+#endif
+		}
+	}
+
+#ifndef MACH
+	dev->change_mtu		= eth_change_mtu;
+	dev->hard_header	= eth_header;
+	dev->rebuild_header 	= eth_rebuild_header;
+	dev->set_mac_address 	= eth_mac_addr;
+	dev->header_cache_bind 	= eth_header_cache_bind;
+	dev->header_cache_update= eth_header_cache_update;
+#endif
+	
+	dev->type		= ARPHRD_ETHER;
+	dev->hard_header_len 	= ETH_HLEN;
+	dev->mtu		= 1500; /* eth_mtu */
+	dev->addr_len		= ETH_ALEN;
+	dev->tx_queue_len	= 100;	/* Ethernet wants good queues */	
+	
+	memset(dev->broadcast,0xFF, ETH_ALEN);
+
+	/* New-style flags. */
+	dev->flags		= IFF_BROADCAST|IFF_MULTICAST;
+	dev->family		= AF_INET;
+	dev->pa_addr	= 0;
+	dev->pa_brdaddr = 0;
+	dev->pa_mask	= 0;
+	dev->pa_alen	= 4;
+}
+
+#ifdef CONFIG_TR
+
+void tr_setup(struct device *dev)
+{
+	int i;
+	/* Fill in the fields of the device structure with ethernet-generic values.
+	   This should be in a common file instead of per-driver.  */
+	for (i = 0; i < DEV_NUMBUFFS; i++)
+		skb_queue_head_init(&dev->buffs[i]);
+
+	dev->hard_header	= tr_header;
+	dev->rebuild_header 	= tr_rebuild_header;
+
+	dev->type		= ARPHRD_IEEE802;
+	dev->hard_header_len 	= TR_HLEN;
+	dev->mtu		= 2000; /* bug in fragmenter...*/
+	dev->addr_len		= TR_ALEN;
+	dev->tx_queue_len	= 100;	/* Long queues on tr */
+	
+	memset(dev->broadcast,0xFF, TR_ALEN);
+
+	/* New-style flags. */
+	dev->flags		= IFF_BROADCAST;
+	dev->family		= AF_INET;
+	dev->pa_addr	= 0;
+	dev->pa_brdaddr = 0;
+	dev->pa_mask	= 0;
+	dev->pa_alen	= 4;
+}
+
+#endif
+
+#ifdef CONFIG_FDDI
+
+void fddi_setup(struct device *dev)
+	{
+	int i;
+
+	/*
+	 * Fill in the fields of the device structure with FDDI-generic values.
+	 * This should be in a common file instead of per-driver.
+	 */
+	for (i=0; i < DEV_NUMBUFFS; i++)
+		skb_queue_head_init(&dev->buffs[i]);
+
+	dev->change_mtu			= fddi_change_mtu;
+	dev->hard_header		= fddi_header;
+	dev->rebuild_header		= fddi_rebuild_header;
+
+	dev->type				= ARPHRD_FDDI;
+	dev->hard_header_len	= FDDI_K_SNAP_HLEN+3;	/* Assume 802.2 SNAP hdr len + 3 pad bytes */
+	dev->mtu				= FDDI_K_SNAP_DLEN;		/* Assume max payload of 802.2 SNAP frame */
+	dev->addr_len			= FDDI_K_ALEN;
+	dev->tx_queue_len		= 100;	/* Long queues on FDDI */
+	
+	memset(dev->broadcast, 0xFF, FDDI_K_ALEN);
+
+	/* New-style flags */
+	dev->flags		= IFF_BROADCAST | IFF_MULTICAST;
+	dev->family		= AF_INET;
+	dev->pa_addr	= 0;
+	dev->pa_brdaddr = 0;
+	dev->pa_mask	= 0;
+	dev->pa_alen	= 4;
+	return;
+	}
+
+#endif
+
+int ether_config(struct device *dev, struct ifmap *map)
+{
+	if (map->mem_start != (u_long)(-1))
+		dev->mem_start = map->mem_start;
+	if (map->mem_end != (u_long)(-1))
+		dev->mem_end = map->mem_end;
+	if (map->base_addr != (u_short)(-1))
+		dev->base_addr = map->base_addr;
+	if (map->irq != (u_char)(-1))
+		dev->irq = map->irq;
+	if (map->dma != (u_char)(-1))
+		dev->dma = map->dma;
+	if (map->port != (u_char)(-1))
+		dev->if_port = map->port;
+	return 0;
+}
+
+//int register_netdev(struct device *dev)
+//{
+//	struct device *d = dev_base;
+//	unsigned long flags;
+//	int i=MAX_ETH_CARDS;
+//
+//	save_flags(flags);
+//	cli();
+//
+//	if (dev && dev->init) {
+//		if (dev->name &&
+//			((dev->name[0] == '\0') || (dev->name[0] == ' '))) {
+//			for (i = 0; i < MAX_ETH_CARDS; ++i)
+//				if (ethdev_index[i] == NULL) {
+//					sprintf(dev->name, "eth%d", i);
+//					printk("loading device '%s'...\n", dev->name);
+//					ethdev_index[i] = dev;
+//					break;
+//				}
+//		}
+//
+//		sti();	/* device probes assume interrupts enabled */
+//		if (dev->init(dev) != 0) {
+//		    if (i < MAX_ETH_CARDS) ethdev_index[i] = NULL;
+//			restore_flags(flags);
+//			return -EIO;
+//		}
+//		cli();
+//
+//		/* Add device to end of chain */
+//		if (dev_base) {
+//			while (d->next)
+//				d = d->next;
+//			d->next = dev;
+//		}
+//		else
+//			dev_base = dev;
+//		dev->next = NULL;
+//	}
+//	restore_flags(flags);
+//	return 0;
+//}
+//
+//void unregister_netdev(struct device *dev)
+//{
+//	struct device *d = dev_base;
+//	unsigned long flags;
+//	int i;
+//
+//	save_flags(flags);
+//	cli();
+//
+//	if (dev == NULL) 
+//	{
+//		printk("was NULL\n");
+//		restore_flags(flags);
+//		return;
+//	}
+//	/* else */
+//	if (dev->start)
+//		printk("ERROR '%s' busy and not MOD_IN_USE.\n", dev->name);
+//
+//	/*
+//	 * 	must jump over main_device+aliases
+//	 * 	avoid alias devices unregistration so that only
+//	 * 	net_alias module manages them
+//	 */
+//#ifdef CONFIG_NET_ALIAS		
+//	if (dev_base == dev)
+//		dev_base = net_alias_nextdev(dev);
+//	else
+//	{
+//		while(d && (net_alias_nextdev(d) != dev)) /* skip aliases */
+//			d = net_alias_nextdev(d);
+//	  
+//		if (d && (net_alias_nextdev(d) == dev))
+//		{
+//			/*
+//			 * 	Critical: Bypass by consider devices as blocks (maindev+aliases)
+//			 */
+//			net_alias_nextdev_set(d, net_alias_nextdev(dev)); 
+//		}
+//#else
+//	if (dev_base == dev)
+//		dev_base = dev->next;
+//	else 
+//	{
+//		while (d && (d->next != dev))
+//			d = d->next;
+//		
+//		if (d && (d->next == dev)) 
+//		{
+//			d->next = dev->next;
+//		}
+//#endif
+//		else 
+//		{
+//			printk("unregister_netdev: '%s' not found\n", dev->name);
+//			restore_flags(flags);
+//			return;
+//		}
+//	}
+//	for (i = 0; i < MAX_ETH_CARDS; ++i) 
+//	{
+//		if (ethdev_index[i] == dev) 
+//		{
+//			ethdev_index[i] = NULL;
+//			break;
+//		}
+//	}
+//
+//	restore_flags(flags);
+//
+//	/*
+//	 *	You can i.e use a interfaces in a route though it is not up.
+//	 *	We call close_dev (which is changed: it will down a device even if
+//	 *	dev->flags==0 (but it will not call dev->stop if IFF_UP
+//	 *	is not set).
+//	 *	This will call notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev),
+//	 *	dev_mc_discard(dev), ....
+//	 */
+//	 
+//	dev_close(dev);
+//}
+
+
+/*
+ * Local variables:
+ *  compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c net_init.c"
+ *  version-control: t
+ *  kept-new-versions: 5
+ *  tab-width: 4
+ * End:
+ */