X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/98d29191ab62caf43c16b3d792996ea51bec067d..3368351a230f70d5daf36464b2a473e4a8c74c8a:/net/net.c

diff --git a/net/net.c b/net/net.c
index f920dbc..d762b47 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1,8 +1,19 @@
+/* net.c
+ * Top-level network glue code
+ * NetWatch system management mode administration console
+ *
+ * Copyright (c) 2008 Jacob Potter and Joshua Wise.  All rights reserved.
+ * This program is free software; you can redistribute and/or modify it under
+ * the terms found in the file LICENSE in the root of this source tree.
+ *
+ */
+
 #include <pci.h>
 #include <smram.h>
 #include <pci-bother.h>
 #include <output.h>
 #include <minilib.h>
+#include <tables.h>
 #include <lwip/init.h>
 #include "net.h"
 
@@ -23,57 +34,14 @@ static struct netif _netif;
 
 extern struct pci_driver a3c90x_driver;
 
-void eth_poll()
+void eth_recv(struct nic *nic, struct pbuf *p)
 {
-	unsigned char pkt[1600];
-	int len;
-	struct pbuf *p, *q;
 	struct eth_hdr *ethhdr;
-	int pos = 0;
-	static int ticks = 0;
-	
-	if (!_nic)
-		return;
-	
-	smram_tseg_set_state(SMRAM_TSEG_OPEN);
-	
-	if ((ticks % 1000) == 0)	/* About a minute */
-		dhcp_coarse_tmr();
-	if ((ticks % 8) == 0)	/* About 500msec*/
-		dhcp_fine_tmr();
-	if ((ticks % 4) == 0)	/* About 250msec*/
-		tcp_tmr();
-	ticks++;
-
-	if (!_nic->poll(_nic, 0))
-		return;
-	
-	_nic->packet = pkt;
-	_nic->poll(_nic, 1);
 	
-	len = _nic->packetlen;
-
-	outputf("NIC: Packet: %d bytes", len);
-		
-	p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
-	if (p == NULL)
-	{
-		outputf("NIC: out of memory for packet?");
-		LINK_STATS_INC(link.memerr);
-		LINK_STATS_INC(link.drop);
-		return;
-	}
-	
-	for(q = p; q != NULL; q = q->next)
-	{
-		memcpy(q->payload, pkt+pos, q->len);
-		pos += q->len;
-	}
-
 	LINK_STATS_INC(link.recv);
 	
 	ethhdr = p->payload;
-
+	
 	switch (htons(ethhdr->type)) {
 	case ETHTYPE_IP:
 	case ETHTYPE_ARP:
@@ -83,7 +51,7 @@ void eth_poll()
 			pbuf_free(p);
 		}
 		break;
-
+		
 	default:
 		outputf("Unhandled packet type %04x input", ethhdr->type);
 		pbuf_free(p);
@@ -91,22 +59,40 @@ void eth_poll()
 	}
 }
 
-static err_t _transmit(struct netif *netif, struct pbuf *p)
+void eth_poll()
 {
-	struct nic *nic = netif->state;
-	struct pbuf *q;
-	unsigned char pkt[1600];
-	unsigned int len = 0;
+	static int ticks = 0;
+	int i = 15;	/* Don't process more than 15 packets at a time; we don't want the host to get TOO badly slowed down... */
+	
+	if (!_nic)
+		return;
+	
+	smram_tseg_set_state(SMRAM_TSEG_OPEN);
+	
+	if ((ticks % 1000) == 0)	/* About a minute */
+		dhcp_coarse_tmr();
+	if ((ticks % 8) == 0)	/* About 500msec*/
+		dhcp_fine_tmr();
+	if ((ticks % 4) == 0)	/* About 250msec*/
+		tcp_tmr();
+	ticks++;
 
-	for(q = p; q != NULL; q = q->next)
+	while (i > 0)
 	{
-		memcpy(pkt + len, q->payload, q->len);
-		len += q->len;
+		int n = _nic->recv(_nic);
+		i -= n;
+		if (n == 0)
+			break;
 	}
+}
+
+static err_t _transmit(struct netif *netif, struct pbuf *p)
+{
+	struct nic *nic = netif->state;
 
-	outputf("NIC: Transmit packet: %d bytes", len);
+//	outputf("NIC: Transmit packet");
 
-	nic->transmit(len, pkt);
+	nic->transmit(nic, p);
 
 	LINK_STATS_INC(link.xmit);
 
@@ -152,10 +138,19 @@ int eth_register(struct nic *nic)
 	return 0;
 }
 
+typedef void(*thunk_t)();
+
+TABLE(thunk_t, protocols);
+
 void eth_init()
 {
+	int i;
+	
 	/* Required for DMA to work. :( */
 	smram_tseg_set_state(SMRAM_TSEG_OPEN);
+
 	lwip_init();
-	pci_probe_driver(a3c90x_driver);
+
+	for (i = 0; i < TABLE_LENGTH(protocols); i++)
+		protocols_table[i]();
 }