diff options
| author | Matt Carlson <mcarlson@broadcom.com> | 2011-07-27 16:20:49 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-07-28 07:39:31 +0200 |
| commit | 0d681b27b0efc962a3038a316e78373de7bfe1ce (patch) | |
| tree | 0ff87deba13d372b5f8262e741dc121c0e07f32f /drivers/net/tg3.c | |
| parent | tg3: Remove short DMA check for 1st fragment (diff) | |
| download | linux-0d681b27b0efc962a3038a316e78373de7bfe1ce.tar.xz linux-0d681b27b0efc962a3038a316e78373de7bfe1ce.zip | |
tg3: Generalize tg3_skb_error_unmap()
In the following patches, unmapping skb fragments will get just as
complicated as mapping them. This patch generalizes
tg3_skb_error_unmap() and makes it the one-stop-shop for skb unmapping.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/tg3.c | 48 |
1 files changed, 16 insertions, 32 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 0f5bcf79d727..3f69f1ace267 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -5913,13 +5913,15 @@ static inline void tg3_tx_set_bd(struct tg3_napi *tnapi, u32 entry, txbd->vlan_tag = (mss << TXD_MSS_SHIFT) | (vlan << TXD_VLAN_TAG_SHIFT); } -static void tg3_skb_error_unmap(struct tg3_napi *tnapi, - struct sk_buff *skb, int last) +static void tg3_tx_skb_unmap(struct tg3_napi *tnapi, u32 entry, int last) { int i; - u32 entry = tnapi->tx_prod; + struct sk_buff *skb; struct tg3_tx_ring_info *txb = &tnapi->tx_buffers[entry]; + skb = txb->skb; + txb->skb = NULL; + pci_unmap_single(tnapi->tp->pdev, dma_unmap_addr(txb, mapping), skb_headlen(skb), @@ -6227,7 +6229,7 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) } if (would_hit_hwbug) { - tg3_skb_error_unmap(tnapi, skb, i); + tg3_tx_skb_unmap(tnapi, tnapi->tx_prod, i); /* If the workaround fails due to memory/mapping * failure, silently drop this packet. @@ -6264,7 +6266,7 @@ out_unlock: return NETDEV_TX_OK; dma_error: - tg3_skb_error_unmap(tnapi, skb, i); + tg3_tx_skb_unmap(tnapi, tnapi->tx_prod, i); dev_kfree_skb(skb); tnapi->tx_buffers[tnapi->tx_prod].skb = NULL; return NETDEV_TX_OK; @@ -6597,35 +6599,13 @@ static void tg3_free_rings(struct tg3 *tp) if (!tnapi->tx_buffers) continue; - for (i = 0; i < TG3_TX_RING_SIZE; ) { - struct tg3_tx_ring_info *txp; - struct sk_buff *skb; - unsigned int k; + for (i = 0; i < TG3_TX_RING_SIZE; i++) { + struct sk_buff *skb = tnapi->tx_buffers[i].skb; - txp = &tnapi->tx_buffers[i]; - skb = txp->skb; - - if (skb == NULL) { - i++; + if (!skb) continue; - } - pci_unmap_single(tp->pdev, - dma_unmap_addr(txp, mapping), - skb_headlen(skb), - PCI_DMA_TODEVICE); - txp->skb = NULL; - - i++; - - for (k = 0; k < skb_shinfo(skb)->nr_frags; k++) { - txp = &tnapi->tx_buffers[i & (TG3_TX_RING_SIZE - 1)]; - pci_unmap_page(tp->pdev, - dma_unmap_addr(txp, mapping), - skb_shinfo(skb)->frags[k].size, - PCI_DMA_TODEVICE); - i++; - } + tg3_tx_skb_unmap(tnapi, i, skb_shinfo(skb)->nr_frags); dev_kfree_skb_any(skb); } @@ -11358,6 +11338,10 @@ static int tg3_run_loopback(struct tg3 *tp, u32 pktsz, int loopback_mode) return -EIO; } + val = tnapi->tx_prod; + tnapi->tx_buffers[val].skb = skb; + dma_unmap_addr_set(&tnapi->tx_buffers[val], mapping, map); + tw32_f(HOSTCC_MODE, tp->coalesce_mode | HOSTCC_MODE_ENABLE | rnapi->coal_now); @@ -11389,7 +11373,7 @@ static int tg3_run_loopback(struct tg3 *tp, u32 pktsz, int loopback_mode) break; } - pci_unmap_single(tp->pdev, map, tx_len, PCI_DMA_TODEVICE); + tg3_tx_skb_unmap(tnapi, tnapi->tx_prod - 1, 0); dev_kfree_skb(skb); if (tx_idx != tnapi->tx_prod) |