ixgb: remove use of skb_dma_map from ixgb

[pandora-kernel.git] / drivers / net / ixgb / ixgb_main.c

diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index 7364606..bcd0f01 100644 (file)
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -892,10 +892,18 @@ static void
 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
                                 struct ixgb_buffer *buffer_info)
 {
-       buffer_info->dma = 0;
+       if (buffer_info->dma) {
+               if (buffer_info->mapped_as_page)
+                       pci_unmap_page(adapter->pdev, buffer_info->dma,
+                                      buffer_info->length, PCI_DMA_TODEVICE);
+               else
+                       pci_unmap_single(adapter->pdev, buffer_info->dma,
+                                        buffer_info->length,
+                                        PCI_DMA_TODEVICE);
+               buffer_info->dma = 0;
+       }
+
        if (buffer_info->skb) {
-               skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb,
-                             DMA_TO_DEVICE);
                dev_kfree_skb_any(buffer_info->skb);
                buffer_info->skb = NULL;
        }
@@ -1272,24 +1280,16 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
            unsigned int first)
 {
        struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
+       struct pci_dev *pdev = adapter->pdev;
        struct ixgb_buffer *buffer_info;
        int len = skb_headlen(skb);
        unsigned int offset = 0, size, count = 0, i;
        unsigned int mss = skb_shinfo(skb)->gso_size;
-
        unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
        unsigned int f;
-       dma_addr_t *map;
 
        i = tx_ring->next_to_use;
 
-       if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
-               dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
-               return 0;
-       }
-
-       map = skb_shinfo(skb)->dma_maps;
-
        while (len) {
                buffer_info = &tx_ring->buffer_info[i];
                size = min(len, IXGB_MAX_DATA_PER_TXD);
@@ -1301,11 +1301,11 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
                buffer_info->length = size;
                WARN_ON(buffer_info->dma != 0);
                buffer_info->time_stamp = jiffies;
-               buffer_info->dma = skb_shinfo(skb)->dma_head + offset;
-                       pci_map_single(adapter->pdev,
-                               skb->data + offset,
-                               size,
-                               PCI_DMA_TODEVICE);
+               buffer_info->mapped_as_page = false;
+               buffer_info->dma = pci_map_single(pdev, skb->data + offset,
+                                                 size, PCI_DMA_TODEVICE);
+               if (pci_dma_mapping_error(pdev, buffer_info->dma))
+                       goto dma_error;
                buffer_info->next_to_watch = 0;
 
                len -= size;
@@ -1323,7 +1323,7 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
 
                frag = &skb_shinfo(skb)->frags[f];
                len = frag->size;
-               offset = 0;
+               offset = frag->page_offset;
 
                while (len) {
                        i++;
@@ -1341,7 +1341,13 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
 
                        buffer_info->length = size;
                        buffer_info->time_stamp = jiffies;
-                       buffer_info->dma = map[f] + offset;
+                       buffer_info->mapped_as_page = true;
+                       buffer_info->dma =
+                               pci_map_page(pdev, frag->page,
+                                            offset, size,
+                                            PCI_DMA_TODEVICE);
+                       if (pci_dma_mapping_error(pdev, buffer_info->dma))
+                               goto dma_error;
                        buffer_info->next_to_watch = 0;
 
                        len -= size;
@@ -1353,6 +1359,22 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
        tx_ring->buffer_info[first].next_to_watch = i;
 
        return count;
+
+dma_error:
+       dev_err(&pdev->dev, "TX DMA map failed\n");
+       buffer_info->dma = 0;
+       count--;
+
+       while (count >= 0) {
+               count--;
+               i--;
+               if (i < 0)
+                       i += tx_ring->count;
+               buffer_info = &tx_ring->buffer_info[i];
+               ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
+       }
+
+       return 0;
 }
 
 static void