tg3: Use SKB DMA helper functions for TX.
David S. Miller [Thu, 11 Sep 2008 11:52:51 +0000 (04:52 -0700)]
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/tg3.c
drivers/net/tg3.h

index 71d2c5c..355e8bc 100644 (file)
@@ -3861,10 +3861,7 @@ static void tg3_tx(struct tg3 *tp)
                        return;
                }
 
-               pci_unmap_single(tp->pdev,
-                                pci_unmap_addr(ri, mapping),
-                                skb_headlen(skb),
-                                PCI_DMA_TODEVICE);
+               skb_dma_unmap(&tp->pdev->dev, skb, DMA_TO_DEVICE);
 
                ri->skb = NULL;
 
@@ -3874,12 +3871,6 @@ static void tg3_tx(struct tg3 *tp)
                        ri = &tp->tx_buffers[sw_idx];
                        if (unlikely(ri->skb != NULL || sw_idx == hw_idx))
                                tx_bug = 1;
-
-                       pci_unmap_page(tp->pdev,
-                                      pci_unmap_addr(ri, mapping),
-                                      skb_shinfo(skb)->frags[i].size,
-                                      PCI_DMA_TODEVICE);
-
                        sw_idx = NEXT_TX(sw_idx);
                }
 
@@ -4633,12 +4624,13 @@ static int tigon3_dma_hwbug_workaround(struct tg3 *tp, struct sk_buff *skb,
        } else {
                /* New SKB is guaranteed to be linear. */
                entry = *start;
-               new_addr = pci_map_single(tp->pdev, new_skb->data, new_skb->len,
-                                         PCI_DMA_TODEVICE);
+               ret = skb_dma_map(&tp->pdev->dev, new_skb, DMA_TO_DEVICE);
+               new_addr = skb_shinfo(new_skb)->dma_maps[0];
+
                /* Make sure new skb does not cross any 4G boundaries.
                 * Drop the packet if it does.
                 */
-               if (tg3_4g_overflow_test(new_addr, new_skb->len)) {
+               if (ret || tg3_4g_overflow_test(new_addr, new_skb->len)) {
                        ret = -1;
                        dev_kfree_skb(new_skb);
                        new_skb = NULL;
@@ -4652,18 +4644,8 @@ static int tigon3_dma_hwbug_workaround(struct tg3 *tp, struct sk_buff *skb,
        /* Now clean up the sw ring entries. */
        i = 0;
        while (entry != last_plus_one) {
-               int len;
-
-               if (i == 0)
-                       len = skb_headlen(skb);
-               else
-                       len = skb_shinfo(skb)->frags[i-1].size;
-               pci_unmap_single(tp->pdev,
-                                pci_unmap_addr(&tp->tx_buffers[entry], mapping),
-                                len, PCI_DMA_TODEVICE);
                if (i == 0) {
                        tp->tx_buffers[entry].skb = new_skb;
-                       pci_unmap_addr_set(&tp->tx_buffers[entry], mapping, new_addr);
                } else {
                        tp->tx_buffers[entry].skb = NULL;
                }
@@ -4671,6 +4653,7 @@ static int tigon3_dma_hwbug_workaround(struct tg3 *tp, struct sk_buff *skb,
                i++;
        }
 
+       skb_dma_unmap(&tp->pdev->dev, skb, DMA_TO_DEVICE);
        dev_kfree_skb(skb);
 
        return ret;
@@ -4705,8 +4688,9 @@ static void tg3_set_txd(struct tg3 *tp, int entry,
 static int tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
        struct tg3 *tp = netdev_priv(dev);
-       dma_addr_t mapping;
        u32 len, entry, base_flags, mss;
+       struct skb_shared_info *sp;
+       dma_addr_t mapping;
 
        len = skb_headlen(skb);
 
@@ -4765,11 +4749,16 @@ static int tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
                               (vlan_tx_tag_get(skb) << 16));
 #endif
 
-       /* Queue skb data, a.k.a. the main skb fragment. */
-       mapping = pci_map_single(tp->pdev, skb->data, len, PCI_DMA_TODEVICE);
+       if (skb_dma_map(&tp->pdev->dev, skb, DMA_TO_DEVICE)) {
+               dev_kfree_skb(skb);
+               goto out_unlock;
+       }
+
+       sp = skb_shinfo(skb);
+
+       mapping = sp->dma_maps[0];
 
        tp->tx_buffers[entry].skb = skb;
-       pci_unmap_addr_set(&tp->tx_buffers[entry], mapping, mapping);
 
        tg3_set_txd(tp, entry, mapping, len, base_flags,
                    (skb_shinfo(skb)->nr_frags == 0) | (mss << 1));
@@ -4785,13 +4774,8 @@ static int tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
                        skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 
                        len = frag->size;
-                       mapping = pci_map_page(tp->pdev,
-                                              frag->page,
-                                              frag->page_offset,
-                                              len, PCI_DMA_TODEVICE);
-
+                       mapping = sp->dma_maps[i + 1];
                        tp->tx_buffers[entry].skb = NULL;
-                       pci_unmap_addr_set(&tp->tx_buffers[entry], mapping, mapping);
 
                        tg3_set_txd(tp, entry, mapping, len,
                                    base_flags, (i == last) | (mss << 1));
@@ -4859,9 +4843,10 @@ tg3_tso_bug_end:
 static int tg3_start_xmit_dma_bug(struct sk_buff *skb, struct net_device *dev)
 {
        struct tg3 *tp = netdev_priv(dev);
-       dma_addr_t mapping;
        u32 len, entry, base_flags, mss;
+       struct skb_shared_info *sp;
        int would_hit_hwbug;
+       dma_addr_t mapping;
 
        len = skb_headlen(skb);
 
@@ -4942,11 +4927,16 @@ static int tg3_start_xmit_dma_bug(struct sk_buff *skb, struct net_device *dev)
                               (vlan_tx_tag_get(skb) << 16));
 #endif
 
-       /* Queue skb data, a.k.a. the main skb fragment. */
-       mapping = pci_map_single(tp->pdev, skb->data, len, PCI_DMA_TODEVICE);
+       if (skb_dma_map(&tp->pdev->dev, skb, DMA_TO_DEVICE)) {
+               dev_kfree_skb(skb);
+               goto out_unlock;
+       }
+
+       sp = skb_shinfo(skb);
+
+       mapping = sp->dma_maps[0];
 
        tp->tx_buffers[entry].skb = skb;
-       pci_unmap_addr_set(&tp->tx_buffers[entry], mapping, mapping);
 
        would_hit_hwbug = 0;
 
@@ -4969,13 +4959,9 @@ static int tg3_start_xmit_dma_bug(struct sk_buff *skb, struct net_device *dev)
                        skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 
                        len = frag->size;
-                       mapping = pci_map_page(tp->pdev,
-                                              frag->page,
-                                              frag->page_offset,
-                                              len, PCI_DMA_TODEVICE);
+                       mapping = sp->dma_maps[i + 1];
 
                        tp->tx_buffers[entry].skb = NULL;
-                       pci_unmap_addr_set(&tp->tx_buffers[entry], mapping, mapping);
 
                        if (tg3_4g_overflow_test(mapping, len))
                                would_hit_hwbug = 1;
@@ -5128,7 +5114,6 @@ static void tg3_free_rings(struct tg3 *tp)
        for (i = 0; i < TG3_TX_RING_SIZE; ) {
                struct tx_ring_info *txp;
                struct sk_buff *skb;
-               int j;
 
                txp = &tp->tx_buffers[i];
                skb = txp->skb;
@@ -5138,22 +5123,11 @@ static void tg3_free_rings(struct tg3 *tp)
                        continue;
                }
 
-               pci_unmap_single(tp->pdev,
-                                pci_unmap_addr(txp, mapping),
-                                skb_headlen(skb),
-                                PCI_DMA_TODEVICE);
-               txp->skb = NULL;
+               skb_dma_unmap(&tp->pdev->dev, skb, DMA_TO_DEVICE);
 
-               i++;
+               txp->skb = NULL;
 
-               for (j = 0; j < skb_shinfo(skb)->nr_frags; j++) {
-                       txp = &tp->tx_buffers[i & (TG3_TX_RING_SIZE - 1)];
-                       pci_unmap_page(tp->pdev,
-                                      pci_unmap_addr(txp, mapping),
-                                      skb_shinfo(skb)->frags[j].size,
-                                      PCI_DMA_TODEVICE);
-                       i++;
-               }
+               i += skb_shinfo(skb)->nr_frags + 1;
 
                dev_kfree_skb_any(skb);
        }
index f5b8cab..6c7b5e3 100644 (file)
@@ -2197,7 +2197,6 @@ struct ring_info {
 
 struct tx_ring_info {
        struct sk_buff                  *skb;
-       DECLARE_PCI_UNMAP_ADDR(mapping)
        u32                             prev_vlan_tag;
 };