diff options
author | Alexander Duyck <alexander.h.duyck@intel.com> | 2009-12-02 17:46:31 +0100 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2009-12-03 04:57:11 +0100 |
commit | adeaa9086399780688679f2a7de4243bdbf77295 (patch) | |
tree | bdb28d1fed9753ce7fd744a95c668a7cc7775933 /drivers/net/ixgb/ixgb_main.c | |
parent | e1000: remove use of skb_dma_map from e1000 driver (diff) | |
download | linux-adeaa9086399780688679f2a7de4243bdbf77295.tar.xz linux-adeaa9086399780688679f2a7de4243bdbf77295.zip |
ixgb: remove use of skb_dma_map from ixgb
skb_dma_map is incompatible with HW iommu due to the fact that multiple
mappings can result in different results each time. For this reason it is
best to just remove use of these function calls.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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 73646062e8dd..bcd0f01d5feb 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 |