---

yaml
---
r: 111852
b: refs/heads/master
c: 762f4c5
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ff819cfb5d95c4945811f5e33aa57274885c7527
+refs/heads/master: 762f4c57105853d1cbad3b96ef18aa23beff3db2

trunk/drivers/net/ixgbe/ixgbe.h

@@ -114,6 +114,7 @@ struct ixgbe_rx_buffer {
 	dma_addr_t dma;
 	struct page *page;
 	dma_addr_t page_dma;
+	unsigned int page_offset;
 };
 
 struct ixgbe_queue_stats {

trunk/drivers/net/ixgbe/ixgbe_main.c

@@ -493,16 +493,24 @@ static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
 	while (cleaned_count--) {
 		rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 
-		if (!bi->page &&
+		if (!bi->page_dma &&
 		    (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
-			bi->page = alloc_page(GFP_ATOMIC);
 			if (!bi->page) {
-				adapter->alloc_rx_page_failed++;
-				goto no_buffers;
+				bi->page = alloc_page(GFP_ATOMIC);
+				if (!bi->page) {
+					adapter->alloc_rx_page_failed++;
+					goto no_buffers;
+				}
+				bi->page_offset = 0;
+			} else {
+				/* use a half page if we're re-using */
+				bi->page_offset ^= (PAGE_SIZE / 2);
 			}
-			bi->page_dma = pci_map_page(pdev, bi->page, 0,
-	                                            PAGE_SIZE,
-	                                            PCI_DMA_FROMDEVICE);
+
+			bi->page_dma = pci_map_page(pdev, bi->page,
+			                            bi->page_offset,
+			                            (PAGE_SIZE / 2),
+			                            PCI_DMA_FROMDEVICE);
 		}
 
 		if (!bi->skb) {
@@ -596,7 +604,7 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
 		if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 			hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
 			len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
-	                       IXGBE_RXDADV_HDRBUFLEN_SHIFT;
+			       IXGBE_RXDADV_HDRBUFLEN_SHIFT;
 			if (hdr_info & IXGBE_RXDADV_SPH)
 				adapter->rx_hdr_split++;
 			if (len > IXGBE_RX_HDR_SIZE)
@@ -620,11 +628,18 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
 
 		if (upper_len) {
 			pci_unmap_page(pdev, rx_buffer_info->page_dma,
-				       PAGE_SIZE, PCI_DMA_FROMDEVICE);
+			               PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
 			rx_buffer_info->page_dma = 0;
 			skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
-					   rx_buffer_info->page, 0, upper_len);
-			rx_buffer_info->page = NULL;
+			                   rx_buffer_info->page,
+			                   rx_buffer_info->page_offset,
+			                   upper_len);
+
+			if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
+			    (page_count(rx_buffer_info->page) != 1))
+				rx_buffer_info->page = NULL;
+			else
+				get_page(rx_buffer_info->page);
 
 			skb->len += upper_len;
 			skb->data_len += upper_len;
@@ -647,6 +662,7 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
 			rx_buffer_info->skb = next_buffer->skb;
 			rx_buffer_info->dma = next_buffer->dma;
 			next_buffer->skb = skb;
+			next_buffer->dma = 0;
 			adapter->non_eop_descs++;
 			goto next_desc;
 		}
@@ -1534,10 +1550,7 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
 	int rx_buf_len;
 
 	/* Decide whether to use packet split mode or not */
-	if (netdev->mtu > ETH_DATA_LEN)
-		adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
-	else
-		adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
+	adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
 
 	/* Set the RX buffer length according to the mode */
 	if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
@@ -2018,12 +2031,12 @@ static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
 		}
 		if (!rx_buffer_info->page)
 			continue;
-		pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE,
-			       PCI_DMA_FROMDEVICE);
+		pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE / 2,
+		               PCI_DMA_FROMDEVICE);
 		rx_buffer_info->page_dma = 0;
-
 		put_page(rx_buffer_info->page);
 		rx_buffer_info->page = NULL;
+		rx_buffer_info->page_offset = 0;
 	}
 
 	size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;