diff options
| -rw-r--r-- | drivers/net/e1000/e1000_main.c | 51 |
1 files changed, 27 insertions, 24 deletions
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index 61b56ca00051..1f390ceb4869 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -2049,14 +2049,10 @@ 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) { - if (buffer_info->dma) { - pci_unmap_page(adapter->pdev, - buffer_info->dma, - buffer_info->length, - PCI_DMA_TODEVICE); - buffer_info->dma = 0; - } + 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; } @@ -2907,16 +2903,24 @@ static int e1000_tx_map(struct e1000_adapter *adapter, unsigned int mss) { struct e1000_hw *hw = &adapter->hw; - struct e1000_buffer *buffer_info; - unsigned int len = skb->len; - unsigned int offset = 0, size, count = 0, i; + unsigned int len = skb_headlen(skb); + unsigned int offset, size, count = 0, i; unsigned int f; - len -= skb->data_len; + 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"); + dev_kfree_skb(skb); + return -2; + } + + map = skb_shinfo(skb)->dma_maps[0]; + offset = 0; + while (len) { - buffer_info = &tx_ring->buffer_info[i]; + struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i]; size = min(len, max_per_txd); /* Workaround for Controller erratum -- * descriptor for non-tso packet in a linear SKB that follows a @@ -2949,11 +2953,7 @@ static int e1000_tx_map(struct e1000_adapter *adapter, size -= 4; buffer_info->length = size; - buffer_info->dma = - pci_map_single(adapter->pdev, - skb->data + offset, - size, - PCI_DMA_TODEVICE); + buffer_info->dma = map + offset; buffer_info->time_stamp = jiffies; buffer_info->next_to_watch = i; @@ -2968,9 +2968,11 @@ static int e1000_tx_map(struct e1000_adapter *adapter, frag = &skb_shinfo(skb)->frags[f]; len = frag->size; - offset = frag->page_offset; + map = skb_shinfo(skb)->dma_maps[f + 1]; + offset = 0; while (len) { + struct e1000_buffer *buffer_info; buffer_info = &tx_ring->buffer_info[i]; size = min(len, max_per_txd); /* Workaround for premature desc write-backs @@ -2986,12 +2988,7 @@ static int e1000_tx_map(struct e1000_adapter *adapter, size -= 4; buffer_info->length = size; - buffer_info->dma = - pci_map_page(adapter->pdev, - frag->page, - offset, - size, - PCI_DMA_TODEVICE); + buffer_info->dma = map + offset; buffer_info->time_stamp = jiffies; buffer_info->next_to_watch = i; @@ -3005,6 +3002,7 @@ static int e1000_tx_map(struct e1000_adapter *adapter, i = (i == 0) ? tx_ring->count - 1 : i - 1; tx_ring->buffer_info[i].skb = skb; tx_ring->buffer_info[first].next_to_watch = i; + smp_wmb(); return count; } @@ -3844,6 +3842,11 @@ static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, /* Detect a transmit hang in hardware, this serializes the * check with the clearing of time_stamp and movement of i */ adapter->detect_tx_hung = false; + /* + * read barrier to make sure that the ->dma member and time + * stamp are updated fully + */ + smp_rmb(); if (tx_ring->buffer_info[eop].dma && time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + (adapter->tx_timeout_factor * HZ)) |