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authorAlexander Duyck <alexander.h.duyck@intel.com>2009-12-02 16:46:31 +0000
committerDavid S. Miller <davem@davemloft.net>2009-12-02 19:57:11 -0800
commitadeaa9086399780688679f2a7de4243bdbf77295 (patch)
treebdb28d1fed9753ce7fd744a95c668a7cc7775933 /drivers/net/ixgb/ixgb_main.c
parent602c0554d7b00c9703e1a0bc584e9c583f577642 (diff)
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.c60
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