diff options
Diffstat (limited to 'drivers/net/ixgb/ixgb_main.c')
| -rw-r--r-- | drivers/net/ixgb/ixgb_main.c | 60 |
1 files changed, 41 insertions, 19 deletions
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c index 73646062e8d..bcd0f01d5fe 100644 --- 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 |