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e1000: remove use of skb_dma_map from e1000 driver 

Remove the use of skb_dma_map from the e1000 driver in order to avoid
issues when HW iommu are in use.

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>
This commit is contained in:
Alexander Duyck 2009-12-02 16:46:00 +00:00 committed by David S. Miller
parent 03b1320dfc
commit 602c0554d7
2 changed files with 41 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/e1000/e1000.h
View File

@ -167,6 +167,7 @@ struct e1000_buffer {
unsigned long time_stamp;
u16 length;
u16 next_to_watch;
u16 mapped_as_page;
};
struct e1000_tx_ring {

56
drivers/net/e1000/e1000_main.c
View File

@ -1839,10 +1839,17 @@ void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
struct e1000_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;
}
@ -2683,22 +2690,14 @@ static int e1000_tx_map(struct e1000_adapter *adapter,
unsigned int mss)
{
struct e1000_hw *hw = &adapter->hw;
struct pci_dev *pdev = adapter->pdev;
struct e1000_buffer *buffer_info;
unsigned int len = skb_headlen(skb);
unsigned int offset, size, count = 0, i;
unsigned int offset = 0, size, count = 0, i;
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;
offset = 0;
while (len) {
buffer_info = &tx_ring->buffer_info[i];
size = min(len, max_per_txd);
@ -2735,7 +2734,11 @@ static int e1000_tx_map(struct e1000_adapter *adapter,
buffer_info->length = size;
/* set time_stamp *before* dma to help avoid a possible race */
buffer_info->time_stamp = jiffies;
buffer_info->dma = skb_shinfo(skb)->dma_head + offset;
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 = i;
len -= size;
@ -2753,7 +2756,7 @@ static int e1000_tx_map(struct e1000_adapter *adapter,
frag = &skb_shinfo(skb)->frags[f];
len = frag->size;
offset = 0;
offset = frag->page_offset;
while (len) {
i++;
@ -2777,7 +2780,12 @@ static int e1000_tx_map(struct e1000_adapter *adapter,
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 = i;
len -= size;
@ -2790,6 +2798,22 @@ static int e1000_tx_map(struct e1000_adapter *adapter,
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];
e1000_unmap_and_free_tx_resource(adapter, buffer_info);
}
return 0;
}
static void e1000_tx_queue(struct e1000_adapter *adapter,