tlan: Remove broken support for big buffers

The big rx/tx buffer support is broken and unlikely to be very useful
as such. Remove it.
Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/tlan.c

@@ -163,6 +163,11 @@
  *	v1.15 Apr 4, 2002    - Correct operation when aui=1 to be
  *	                       10T half duplex no loopback
  *	                       Thanks to Gunnar Eikman
+ *
+ *	Sakari Ailus <sakari.ailus@iki.fi>:
+ *
+ *	v1.15a Dec 15 2008   - Remove bbuf support, it doesn't work anyway.
+ *
  *******************************************************************************/
 
 #include <linux/module.h>
@@ -213,12 +218,8 @@ static  int		debug;
 module_param(debug, int, 0);
 MODULE_PARM_DESC(debug, "ThunderLAN debug mask");
 
-static	int		bbuf;
-module_param(bbuf, int, 0);
-MODULE_PARM_DESC(bbuf, "ThunderLAN use big buffer (0-1)");
-
 static	const char TLanSignature[] = "TLAN";
-static  const char tlan_banner[] = "ThunderLAN driver v1.15\n";
+static  const char tlan_banner[] = "ThunderLAN driver v1.15a\n";
 static  int tlan_have_pci;
 static  int tlan_have_eisa;
 
@@ -859,13 +860,8 @@ static int TLan_Init( struct net_device *dev )
 
 	priv = netdev_priv(dev);
 
-	if ( bbuf ) {
-		dma_size = ( TLAN_NUM_RX_LISTS + TLAN_NUM_TX_LISTS )
-	           * ( sizeof(TLanList) + TLAN_MAX_FRAME_SIZE );
-	} else {
 	dma_size = ( TLAN_NUM_RX_LISTS + TLAN_NUM_TX_LISTS )
 		* ( sizeof(TLanList) );
-	}
 	priv->dmaStorage = pci_alloc_consistent(priv->pciDev,
 						dma_size, &priv->dmaStorageDMA);
 	priv->dmaSize = dma_size;
@@ -881,16 +877,6 @@ static int TLan_Init( struct net_device *dev )
 	priv->txList = priv->rxList + TLAN_NUM_RX_LISTS;
 	priv->txListDMA = priv->rxListDMA + sizeof(TLanList) * TLAN_NUM_RX_LISTS;
 
-	if ( bbuf ) {
-		priv->rxBuffer = (u8 *) ( priv->txList + TLAN_NUM_TX_LISTS );
-		priv->rxBufferDMA =priv->txListDMA
-			+ sizeof(TLanList) * TLAN_NUM_TX_LISTS;
-		priv->txBuffer = priv->rxBuffer
-			+ ( TLAN_NUM_RX_LISTS * TLAN_MAX_FRAME_SIZE );
-		priv->txBufferDMA = priv->rxBufferDMA
-			+ ( TLAN_NUM_RX_LISTS * TLAN_MAX_FRAME_SIZE );
-	}
-
 	err = 0;
 	for ( i = 0;  i < 6 ; i++ )
 		err |= TLan_EeReadByte( dev,
@@ -1094,9 +1080,8 @@ static void TLan_tx_timeout_work(struct work_struct *work)
 static int TLan_StartTx( struct sk_buff *skb, struct net_device *dev )
 {
 	TLanPrivateInfo *priv = netdev_priv(dev);
-	TLanList	*tail_list;
 	dma_addr_t	tail_list_phys;
-	u8		*tail_buffer;
+	TLanList	*tail_list;
 	unsigned long	flags;
 	unsigned int    txlen;
 
@@ -1125,15 +1110,10 @@ static int TLan_StartTx( struct sk_buff *skb, struct net_device *dev )
 
 	tail_list->forward = 0;
 
-	if ( bbuf ) {
-		tail_buffer = priv->txBuffer + ( priv->txTail * TLAN_MAX_FRAME_SIZE );
-		skb_copy_from_linear_data(skb, tail_buffer, txlen);
-	} else {
 	tail_list->buffer[0].address = pci_map_single(priv->pciDev,
 						      skb->data, txlen,
 						      PCI_DMA_TODEVICE);
 	TLan_StoreSKB(tail_list, skb);
-	}
 
 	tail_list->frameSize = (u16) txlen;
 	tail_list->buffer[0].count = TLAN_LAST_BUFFER | (u32) txlen;
@@ -1163,9 +1143,6 @@ static int TLan_StartTx( struct sk_buff *skb, struct net_device *dev )
 
 	CIRC_INC( priv->txTail, TLAN_NUM_TX_LISTS );
 
-	if ( bbuf )
-		dev_kfree_skb_any(skb);
-
 	dev->trans_start = jiffies;
 	return 0;
 
@@ -1429,9 +1406,9 @@ static u32 TLan_HandleTxEOF( struct net_device *dev, u16 host_int )
 	head_list = priv->txList + priv->txHead;
 
 	while (((tmpCStat = head_list->cStat ) & TLAN_CSTAT_FRM_CMP) && (ack < 255)) {
-		ack++;
-		if ( ! bbuf ) {
 		struct sk_buff *skb = TLan_GetSKB(head_list);
+
+		ack++;
 		pci_unmap_single(priv->pciDev, head_list->buffer[0].address,
 				 max(skb->len,
 				     (unsigned int)TLAN_MIN_FRAME_SIZE),
@@ -1439,7 +1416,6 @@ static u32 TLan_HandleTxEOF( struct net_device *dev, u16 host_int )
 		dev_kfree_skb_any(skb);
 		head_list->buffer[8].address = 0;
 		head_list->buffer[9].address = 0;
-		}
 
 		if ( tmpCStat & TLAN_CSTAT_EOC )
 			eoc = 1;
@@ -1549,7 +1525,6 @@ static u32 TLan_HandleRxEOF( struct net_device *dev, u16 host_int )
 	TLanPrivateInfo	*priv = netdev_priv(dev);
 	u32		ack = 0;
 	int		eoc = 0;
-	u8		*head_buffer;
 	TLanList	*head_list;
 	struct sk_buff	*skb;
 	TLanList	*tail_list;
@@ -1564,30 +1539,12 @@ static u32 TLan_HandleRxEOF( struct net_device *dev, u16 host_int )
 	while (((tmpCStat = head_list->cStat) & TLAN_CSTAT_FRM_CMP) && (ack < 255)) {
 		dma_addr_t frameDma = head_list->buffer[0].address;
 		u32 frameSize = head_list->frameSize;
+		struct sk_buff *new_skb;
+
 		ack++;
 		if (tmpCStat & TLAN_CSTAT_EOC)
 			eoc = 1;
 
-		if (bbuf) {
-			skb = netdev_alloc_skb(dev, frameSize + 7);
-			if ( !skb )
-				goto drop_and_reuse;
-
-			head_buffer = priv->rxBuffer
-				+ (priv->rxHead * TLAN_MAX_FRAME_SIZE);
-			skb_reserve(skb, 2);
-			pci_dma_sync_single_for_cpu(priv->pciDev,
-						    frameDma, frameSize,
-						    PCI_DMA_FROMDEVICE);
-			skb_copy_from_linear_data(skb, head_buffer, frameSize);
-			skb_put(skb, frameSize);
-			dev->stats.rx_bytes += frameSize;
-
-			skb->protocol = eth_type_trans( skb, dev );
-			netif_rx( skb );
-		} else {
-			struct sk_buff *new_skb;
-
 		new_skb = netdev_alloc_skb(dev, TLAN_MAX_FRAME_SIZE + 7 );
 		if ( !new_skb )
 			goto drop_and_reuse;
@@ -1609,8 +1566,6 @@ static u32 TLan_HandleRxEOF( struct net_device *dev, u16 host_int )
 							      PCI_DMA_FROMDEVICE);
 
 		TLan_StoreSKB(head_list, new_skb);
-
-		}
 drop_and_reuse:
 		head_list->forward = 0;
 		head_list->cStat = 0;
@@ -1993,12 +1948,7 @@ static void TLan_ResetLists( struct net_device *dev )
 	for ( i = 0; i < TLAN_NUM_TX_LISTS; i++ ) {
 		list = priv->txList + i;
 		list->cStat = TLAN_CSTAT_UNUSED;
-		if ( bbuf ) {
-			list->buffer[0].address = priv->txBufferDMA
-				+ ( i * TLAN_MAX_FRAME_SIZE );
-		} else {
 		list->buffer[0].address = 0;
-		}
 		list->buffer[2].count = 0;
 		list->buffer[2].address = 0;
 		list->buffer[8].address = 0;
@@ -2013,10 +1963,6 @@ static void TLan_ResetLists( struct net_device *dev )
 		list->cStat = TLAN_CSTAT_READY;
 		list->frameSize = TLAN_MAX_FRAME_SIZE;
 		list->buffer[0].count = TLAN_MAX_FRAME_SIZE | TLAN_LAST_BUFFER;
-		if ( bbuf ) {
-			list->buffer[0].address = priv->rxBufferDMA
-				+ ( i * TLAN_MAX_FRAME_SIZE );
-		} else {
 		skb = netdev_alloc_skb(dev, TLAN_MAX_FRAME_SIZE + 7 );
 		if ( !skb ) {
 			pr_err("TLAN: out of memory for received data.\n" );
@@ -2029,7 +1975,6 @@ static void TLan_ResetLists( struct net_device *dev )
 							 TLAN_MAX_FRAME_SIZE,
 							 PCI_DMA_FROMDEVICE);
 		TLan_StoreSKB(list, skb);
-		}
 		list->buffer[1].count = 0;
 		list->buffer[1].address = 0;
 		list->forward = list_phys + sizeof(TLanList);
@@ -2052,7 +1997,6 @@ static void TLan_FreeLists( struct net_device *dev )
 	TLanList	*list;
 	struct sk_buff	*skb;
 
-	if ( ! bbuf ) {
 	for ( i = 0; i < TLAN_NUM_TX_LISTS; i++ ) {
 		list = priv->txList + i;
 		skb = TLan_GetSKB(list);
@@ -2082,7 +2026,6 @@ static void TLan_FreeLists( struct net_device *dev )
 			list->buffer[9].address = 0;
 		}
 	}
-	}
 } /* TLan_FreeLists */