diff options
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/calxeda/xgmac.c | 55 |
1 files changed, 24 insertions, 31 deletions
diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c index df7e3e2579f1..64854ad84b55 100644 --- a/drivers/net/ethernet/calxeda/xgmac.c +++ b/drivers/net/ethernet/calxeda/xgmac.c @@ -470,6 +470,11 @@ static inline int desc_get_tx_ls(struct xgmac_dma_desc *p) return le32_to_cpu(p->flags) & TXDESC_LAST_SEG; } +static inline int desc_get_tx_fs(struct xgmac_dma_desc *p) +{ + return le32_to_cpu(p->flags) & TXDESC_FIRST_SEG; +} + static inline u32 desc_get_buf_addr(struct xgmac_dma_desc *p) { return le32_to_cpu(p->buf1_addr); @@ -796,7 +801,7 @@ static void xgmac_free_rx_skbufs(struct xgmac_priv *priv) static void xgmac_free_tx_skbufs(struct xgmac_priv *priv) { - int i, f; + int i; struct xgmac_dma_desc *p; if (!priv->tx_skbuff) @@ -807,16 +812,15 @@ static void xgmac_free_tx_skbufs(struct xgmac_priv *priv) continue; p = priv->dma_tx + i; - dma_unmap_single(priv->device, desc_get_buf_addr(p), - desc_get_buf_len(p), DMA_TO_DEVICE); - - for (f = 0; f < skb_shinfo(priv->tx_skbuff[i])->nr_frags; f++) { - p = priv->dma_tx + i++; + if (desc_get_tx_fs(p)) + dma_unmap_single(priv->device, desc_get_buf_addr(p), + desc_get_buf_len(p), DMA_TO_DEVICE); + else dma_unmap_page(priv->device, desc_get_buf_addr(p), desc_get_buf_len(p), DMA_TO_DEVICE); - } - dev_kfree_skb_any(priv->tx_skbuff[i]); + if (desc_get_tx_ls(p)) + dev_kfree_skb_any(priv->tx_skbuff[i]); priv->tx_skbuff[i] = NULL; } } @@ -853,8 +857,6 @@ static void xgmac_free_dma_desc_rings(struct xgmac_priv *priv) */ static void xgmac_tx_complete(struct xgmac_priv *priv) { - int i; - while (dma_ring_cnt(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ)) { unsigned int entry = priv->tx_tail; struct sk_buff *skb = priv->tx_skbuff[entry]; @@ -864,33 +866,24 @@ static void xgmac_tx_complete(struct xgmac_priv *priv) if (desc_get_owner(p)) break; - /* Verify tx error by looking at the last segment */ - if (desc_get_tx_ls(p)) - desc_get_tx_status(priv, p); - netdev_dbg(priv->dev, "tx ring: curr %d, dirty %d\n", priv->tx_head, priv->tx_tail); - dma_unmap_single(priv->device, desc_get_buf_addr(p), - desc_get_buf_len(p), DMA_TO_DEVICE); - - priv->tx_skbuff[entry] = NULL; - priv->tx_tail = dma_ring_incr(entry, DMA_TX_RING_SZ); - - if (!skb) { - continue; - } - - for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { - entry = priv->tx_tail = dma_ring_incr(priv->tx_tail, - DMA_TX_RING_SZ); - p = priv->dma_tx + priv->tx_tail; - + if (desc_get_tx_fs(p)) + dma_unmap_single(priv->device, desc_get_buf_addr(p), + desc_get_buf_len(p), DMA_TO_DEVICE); + else dma_unmap_page(priv->device, desc_get_buf_addr(p), desc_get_buf_len(p), DMA_TO_DEVICE); + + /* Check tx error on the last segment */ + if (desc_get_tx_ls(p)) { + desc_get_tx_status(priv, p); + dev_kfree_skb(skb); } - dev_kfree_skb(skb); + priv->tx_skbuff[entry] = NULL; + priv->tx_tail = dma_ring_incr(entry, DMA_TX_RING_SZ); } if (dma_ring_space(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ) > @@ -1110,7 +1103,7 @@ static netdev_tx_t xgmac_xmit(struct sk_buff *skb, struct net_device *dev) entry = dma_ring_incr(entry, DMA_TX_RING_SZ); desc = priv->dma_tx + entry; - priv->tx_skbuff[entry] = NULL; + priv->tx_skbuff[entry] = skb; desc_set_buf_addr_and_size(desc, paddr, len); if (i < (nfrags - 1)) |