diff options
| -rw-r--r-- | drivers/net/igb/igb_main.c | 66 |
1 files changed, 35 insertions, 31 deletions
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index d6dda162116..ca842163dce 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -2257,19 +2257,14 @@ static void igb_free_all_tx_resources(struct igb_adapter *adapter) static void igb_unmap_and_free_tx_resource(struct igb_adapter *adapter, struct igb_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; } buffer_info->time_stamp = 0; - buffer_info->next_to_watch = 0; /* buffer_info must be completely set up in the transmit path */ } @@ -3078,25 +3073,33 @@ static inline int igb_tx_map_adv(struct igb_adapter *adapter, unsigned int len = skb_headlen(skb); unsigned int 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; + buffer_info = &tx_ring->buffer_info[i]; BUG_ON(len >= IGB_MAX_DATA_PER_TXD); buffer_info->length = len; /* set time_stamp *before* dma to help avoid a possible race */ buffer_info->time_stamp = jiffies; buffer_info->next_to_watch = i; - buffer_info->dma = pci_map_single(adapter->pdev, skb->data, len, - PCI_DMA_TODEVICE); + buffer_info->dma = map[count]; count++; - i++; - if (i == tx_ring->count) - i = 0; for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { struct skb_frag_struct *frag; + i++; + if (i == tx_ring->count) + i = 0; + frag = &skb_shinfo(skb)->frags[f]; len = frag->size; @@ -3105,19 +3108,10 @@ static inline int igb_tx_map_adv(struct igb_adapter *adapter, buffer_info->length = len; buffer_info->time_stamp = jiffies; buffer_info->next_to_watch = i; - buffer_info->dma = pci_map_page(adapter->pdev, - frag->page, - frag->page_offset, - len, - PCI_DMA_TODEVICE); - + buffer_info->dma = map[count]; count++; - i++; - if (i == tx_ring->count) - i = 0; } - 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; @@ -3230,6 +3224,7 @@ static int igb_xmit_frame_ring_adv(struct sk_buff *skb, unsigned int first; unsigned int tx_flags = 0; u8 hdr_len = 0; + int count = 0; int tso = 0; union skb_shared_tx *shtx; @@ -3291,14 +3286,23 @@ static int igb_xmit_frame_ring_adv(struct sk_buff *skb, (skb->ip_summed == CHECKSUM_PARTIAL)) tx_flags |= IGB_TX_FLAGS_CSUM; - igb_tx_queue_adv(adapter, tx_ring, tx_flags, - igb_tx_map_adv(adapter, tx_ring, skb, first), - skb->len, hdr_len); - - netdev->trans_start = jiffies; - - /* Make sure there is space in the ring for the next send. */ - igb_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 4); + /* + * count reflects descriptors mapped, if 0 then mapping error + * has occured and we need to rewind the descriptor queue + */ + count = igb_tx_map_adv(adapter, tx_ring, skb, first); + + if (count) { + igb_tx_queue_adv(adapter, tx_ring, tx_flags, count, + skb->len, hdr_len); + netdev->trans_start = jiffies; + /* Make sure there is space in the ring for the next send. */ + igb_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 4); + } else { + dev_kfree_skb_any(skb); + tx_ring->buffer_info[first].time_stamp = 0; + tx_ring->next_to_use = first; + } return NETDEV_TX_OK; } |