X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fnet%2Fvxge%2Fvxge-main.c;h=094d15548a2be51bb79aa1dc4a6345b9fa691848;hb=db91f2e4d410bf3011b3649b9257e5b3c60b25ff;hp=7b5402b50d0aecf23c38002cdab3d3b5fb5e82ec;hpb=da8120355e80ddaf534adb8ed910871d97512d56;p=pandora-kernel.git

diff --git a/drivers/net/vxge/vxge-main.c b/drivers/net/vxge/vxge-main.c
index 7b5402b50d0a..094d15548a2b 100644
--- a/drivers/net/vxge/vxge-main.c
+++ b/drivers/net/vxge/vxge-main.c
@@ -87,22 +87,25 @@ static inline int is_vxge_card_up(struct vxgedev *vdev)
 static inline void VXGE_COMPLETE_VPATH_TX(struct vxge_fifo *fifo)
 {
 	unsigned long flags = 0;
-	struct sk_buff *skb_ptr = NULL;
-	struct sk_buff **temp, *head, *skb;
-
-	if (spin_trylock_irqsave(&fifo->tx_lock, flags)) {
-		vxge_hw_vpath_poll_tx(fifo->handle, (void **)&skb_ptr);
-		spin_unlock_irqrestore(&fifo->tx_lock, flags);
-	}
-	/* free SKBs */
-	head = skb_ptr;
-	while (head) {
-		skb = head;
-		temp = (struct sk_buff **)&skb->cb;
-		head = *temp;
-		*temp = NULL;
-		dev_kfree_skb_irq(skb);
-	}
+	struct sk_buff **skb_ptr = NULL;
+	struct sk_buff **temp;
+#define NR_SKB_COMPLETED 128
+	struct sk_buff *completed[NR_SKB_COMPLETED];
+	int more;
+
+	do {
+		more = 0;
+		skb_ptr = completed;
+
+		if (spin_trylock_irqsave(&fifo->tx_lock, flags)) {
+			vxge_hw_vpath_poll_tx(fifo->handle, &skb_ptr,
+						NR_SKB_COMPLETED, &more);
+			spin_unlock_irqrestore(&fifo->tx_lock, flags);
+		}
+		/* free SKBs */
+		for (temp = completed; temp != skb_ptr; temp++)
+			dev_kfree_skb_irq(*temp);
+	} while (more) ;
 }
 
 static inline void VXGE_COMPLETE_ALL_TX(struct vxgedev *vdev)
@@ -283,6 +286,7 @@ vxge_rx_alloc(void *dtrh, struct vxge_ring *ring, const int skb_size)
 	skb_reserve(skb, VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN);
 
 	rx_priv->skb = skb;
+	rx_priv->skb_data = NULL;
 	rx_priv->data_size = skb_size;
 	vxge_debug_entryexit(VXGE_TRACE,
 		"%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__);
@@ -302,7 +306,8 @@ static int vxge_rx_map(void *dtrh, struct vxge_ring *ring)
 		ring->ndev->name, __func__, __LINE__);
 	rx_priv = vxge_hw_ring_rxd_private_get(dtrh);
 
-	dma_addr = pci_map_single(ring->pdev, rx_priv->skb->data,
+	rx_priv->skb_data = rx_priv->skb->data;
+	dma_addr = pci_map_single(ring->pdev, rx_priv->skb_data,
 				rx_priv->data_size, PCI_DMA_FROMDEVICE);
 
 	if (dma_addr == 0) {
@@ -442,10 +447,12 @@ vxge_rx_1b_compl(struct __vxge_hw_ring *ringh, void *dtr,
 	vxge_hw_ring_replenish(ringh, 0);
 
 	do {
+		prefetch((char *)dtr + L1_CACHE_BYTES);
 		rx_priv = vxge_hw_ring_rxd_private_get(dtr);
 		skb = rx_priv->skb;
 		data_size = rx_priv->data_size;
 		data_dma = rx_priv->data_dma;
+		prefetch(rx_priv->skb_data);
 
 		vxge_debug_rx(VXGE_TRACE,
 			"%s: %s:%d  skb = 0x%p",
@@ -600,11 +607,10 @@ vxge_rx_1b_compl(struct __vxge_hw_ring *ringh, void *dtr,
 enum vxge_hw_status
 vxge_xmit_compl(struct __vxge_hw_fifo *fifo_hw, void *dtr,
 		enum vxge_hw_fifo_tcode t_code, void *userdata,
-		void **skb_ptr)
+		struct sk_buff ***skb_ptr, int nr_skb, int *more)
 {
 	struct vxge_fifo *fifo = (struct vxge_fifo *)userdata;
-	struct sk_buff *skb, *head = NULL;
-	struct sk_buff **temp;
+	struct sk_buff *skb, **done_skb = *skb_ptr;
 	int pkt_cnt = 0;
 
 	vxge_debug_entryexit(VXGE_TRACE,
@@ -657,9 +663,12 @@ vxge_xmit_compl(struct __vxge_hw_fifo *fifo_hw, void *dtr,
 		fifo->stats.tx_frms++;
 		fifo->stats.tx_bytes += skb->len;
 
-		temp = (struct sk_buff **)&skb->cb;
-		*temp = head;
-		head = skb;
+		*done_skb++ = skb;
+
+		if (--nr_skb <= 0) {
+			*more = 1;
+			break;
+		}
 
 		pkt_cnt++;
 		if (pkt_cnt > fifo->indicate_max_pkts)
@@ -668,11 +677,9 @@ vxge_xmit_compl(struct __vxge_hw_fifo *fifo_hw, void *dtr,
 	} while (vxge_hw_fifo_txdl_next_completed(fifo_hw,
 				&dtr, &t_code) == VXGE_HW_OK);
 
+	*skb_ptr = done_skb;
 	vxge_wake_tx_queue(fifo, skb);
 
-	if (skb_ptr)
-		*skb_ptr = (void *) head;
-
 	vxge_debug_entryexit(VXGE_TRACE,
 				"%s: %s:%d  Exiting...",
 				fifo->ndev->name, __func__, __LINE__);
@@ -895,6 +902,12 @@ vxge_xmit(struct sk_buff *skb, struct net_device *dev)
 		goto _exit2;
 	}
 
+	/* Last TXD?  Stop tx queue to avoid dropping packets.  TX
+	 * completion will resume the queue.
+	 */
+	if (avail == 1)
+		vxge_stop_tx_queue(fifo);
+
 	status = vxge_hw_fifo_txdl_reserve(fifo_hw, &dtr, &dtr_priv);
 	if (unlikely(status != VXGE_HW_OK)) {
 		vxge_debug_tx(VXGE_ERR,
@@ -1046,6 +1059,7 @@ vxge_rx_term(void *dtrh, enum vxge_hw_rxd_state state, void *userdata)
 		rx_priv->data_size, PCI_DMA_FROMDEVICE);
 
 	dev_kfree_skb(rx_priv->skb);
+	rx_priv->skb_data = NULL;
 
 	vxge_debug_entryexit(VXGE_TRACE,
 		"%s: %s:%d  Exiting...",
@@ -3956,6 +3970,9 @@ static pci_ers_result_t vxge_io_error_detected(struct pci_dev *pdev,
 
 	netif_device_detach(netdev);
 
+	if (state == pci_channel_io_perm_failure)
+		return PCI_ERS_RESULT_DISCONNECT;
+
 	if (netif_running(netdev)) {
 		/* Bring down the card, while avoiding PCI I/O */
 		do_vxge_close(netdev, 0);