From 54d4b877c72b90fe057143b1bc6e49718a3cb82a Mon Sep 17 00:00:00 2001
From: Joshua Wise <joshua@nyus.joshuawise.com>
Date: Thu, 4 Dec 2008 17:58:36 -0500
Subject: [PATCH] Lolol, boxing and unboxing?

---
 net/3c90x.c            | 26 ++++++++++++++++++--------
 net/etherboot-compat.h |  3 ++-
 net/net.c              | 11 ++++-------
 net/net.h              |  4 ++--
 4 files changed, 26 insertions(+), 18 deletions(-)

diff --git a/net/3c90x.c b/net/3c90x.c
index 64dd655..3a6c958 100644
--- a/net/3c90x.c
+++ b/net/3c90x.c
@@ -224,8 +224,10 @@ typedef struct
     {
     unsigned int	DnNextPtr;
     unsigned int	FrameStartHeader;
-    unsigned int	DataAddr;
-    unsigned int	DataLength;
+    struct {
+      unsigned int addr;
+      unsigned int len;
+    } __attribute ((aligned(8))) segments[64];
     }
     TXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
 
@@ -473,17 +475,16 @@ static void a3c90x_reset(void)
  *** pkt - the pointer to the packet data itself.
  ***/
 static void
-a3c90x_transmit(unsigned int size, const char *pkt)
+a3c90x_transmit(struct pbuf *p)
 {
 	unsigned char status;
 	static unsigned int stillwaiting = 0;
+	unsigned int n, len;
 
 	if (stillwaiting)
 	{
-		outputf("Waiting for network completion...");
 		while (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_TXCOMPLETE) && oneshot_running())
 			;
-		outputf("Done");
 		if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_TXCOMPLETE))
 		{
 			outputf("3c90x: tx timeout? txstat %02x", inb(INF_3C90X.IOAddr + regTxStatus_b));
@@ -498,11 +499,20 @@ a3c90x_transmit(unsigned int size, const char *pkt)
 
 	/** Setup the DPD (download descriptor) **/
 	INF_3C90X.TransmitDPD.DnNextPtr = 0;
+	len = 0;
+	n = 0;
+	for (; p; p = p->next)
+	{
+		INF_3C90X.TransmitDPD.segments[n].addr = (unsigned int)p->payload;
+		INF_3C90X.TransmitDPD.segments[n].len = p->len | (p->next ? 0 : (1 << 31));
+		len += p->len;
+		n++;
+	}
 	/** set notification for transmission completion (bit 15) **/
-	INF_3C90X.TransmitDPD.FrameStartHeader = (size) | 0x8000;
-	INF_3C90X.TransmitDPD.DataAddr = v2p((void*)pkt);
-	INF_3C90X.TransmitDPD.DataLength = size + (1<<31);
+	INF_3C90X.TransmitDPD.FrameStartHeader = (len) | 0x8000;
 	
+	outputf("3c90x: Sending %d byte %d seg packet", len, n);
+
 	/** Send the packet **/
 	outl(INF_3C90X.IOAddr + regDnListPtr_l, v2p(&(INF_3C90X.TransmitDPD)));
 	_issue_command(INF_3C90X.IOAddr, cmdStallCtl, 3 /* Unstall download */);
diff --git a/net/etherboot-compat.h b/net/etherboot-compat.h
index e769ce8..6982a21 100644
--- a/net/etherboot-compat.h
+++ b/net/etherboot-compat.h
@@ -2,6 +2,7 @@
 #define _ETHERBOOT_COMPAT_H
 
 #include <paging.h>
+#include "lwip/pbuf.h"
 
 #define ETH_ALEN	6
 
@@ -19,7 +20,7 @@ struct nic {
 	unsigned char hwaddr[6];
 
 	int (*poll) (struct nic *nic, int retrieve);
-	void (*transmit) (unsigned int size, const char *pkt);
+	void (*transmit) (struct pbuf *p);
 };
 
 #define virt_to_bus(x) memory_v2p((void *)(x))
diff --git a/net/net.c b/net/net.c
index 7fa7c46..598ea75 100644
--- a/net/net.c
+++ b/net/net.c
@@ -96,19 +96,16 @@ void eth_poll()
 static err_t _transmit(struct netif *netif, struct pbuf *p)
 {
 	struct nic *nic = netif->state;
-	struct pbuf *q;
-	unsigned char pkt[1600];
-	unsigned int len = 0;
 
-	for(q = p; q != NULL; q = q->next)
+/*	for(q = p; q != NULL; q = q->next)
 	{
 		memcpy(pkt + len, q->payload, q->len);
 		len += q->len;
-	}
+	}*/
 
-	outputf("NIC: Transmit packet: %d bytes", len);
+	outputf("NIC: Transmit packet");
 
-	nic->transmit(len, pkt);
+	nic->transmit(p);
 
 	LINK_STATS_INC(link.xmit);
 
diff --git a/net/net.h b/net/net.h
index c665216..7b522f0 100644
--- a/net/net.h
+++ b/net/net.h
@@ -1,5 +1,5 @@
-#ifndef _3C905_H
-#define _3C905_H
+#ifndef _NET_H
+#define _NET_H
 
 #include "etherboot-compat.h"
 
-- 
2.39.2