be2net: remove use of skb_dma_map/unmap

Due to the fact that skb_dma_map/unmap do not work correctly when a HW
IOMMU is enabled it has been recommended to go about removing the calls
from the network device drivers.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 26 insertions, 11 deletions

diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index e291b1b87532..f24ac4b5ce8f 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -394,15 +394,11 @@ static int make_tx_wrbs(struct be_adapter *adapter,
         atomic_add(wrb_cnt, &txq->used);
         queue_head_inc(txq);
 
-        if (skb_dma_map(&pdev->dev, skb, DMA_TO_DEVICE)) {
-                dev_err(&pdev->dev, "TX DMA mapping failed\n");
-                return 0;
-        }
-
         if (skb->len > skb->data_len) {
                 int len = skb->len - skb->data_len;
+                busaddr = pci_map_single(pdev, skb->data, len,
+                                         PCI_DMA_TODEVICE);
                 wrb = queue_head_node(txq);
-                busaddr = skb_shinfo(skb)->dma_head;
                 wrb_fill(wrb, busaddr, len);
                 be_dws_cpu_to_le(wrb, sizeof(*wrb));
                 queue_head_inc(txq);
@@ -412,8 +408,9 @@ static int make_tx_wrbs(struct be_adapter *adapter,
         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
                 struct skb_frag_struct *frag =
                         &skb_shinfo(skb)->frags[i];
-
-                busaddr = skb_shinfo(skb)->dma_maps[i];
+                busaddr = pci_map_page(pdev, frag->page,
+                                       frag->page_offset,
+                                       frag->size, PCI_DMA_TODEVICE);
                 wrb = queue_head_node(txq);
                 wrb_fill(wrb, busaddr, frag->size);
                 be_dws_cpu_to_le(wrb, sizeof(*wrb));
@@ -986,23 +983,41 @@ static struct be_eth_tx_compl *be_tx_compl_get(struct be_queue_info *tx_cq)
 static void be_tx_compl_process(struct be_adapter *adapter, u16 last_index)
 {
         struct be_queue_info *txq = &adapter->tx_obj.q;
+        struct be_eth_wrb *wrb;
         struct sk_buff **sent_skbs = adapter->tx_obj.sent_skb_list;
         struct sk_buff *sent_skb;
+        u64 busaddr;
         u16 cur_index, num_wrbs = 0;
 
         cur_index = txq->tail;
         sent_skb = sent_skbs[cur_index];
         BUG_ON(!sent_skb);
         sent_skbs[cur_index] = NULL;
+        wrb = queue_tail_node(txq);
+        be_dws_le_to_cpu(wrb, sizeof(*wrb));
+        busaddr = ((u64)wrb->frag_pa_hi << 32) | (u64)wrb->frag_pa_lo;
+        if (busaddr != 0) {
+                pci_unmap_single(adapter->pdev, busaddr,
+                                 wrb->frag_len, PCI_DMA_TODEVICE);
+        }
+        num_wrbs++;
+        queue_tail_inc(txq);
 
-        do {
+        while (cur_index != last_index) {
                 cur_index = txq->tail;
+                wrb = queue_tail_node(txq);
+                be_dws_le_to_cpu(wrb, sizeof(*wrb));
+                busaddr = ((u64)wrb->frag_pa_hi << 32) | (u64)wrb->frag_pa_lo;
+                if (busaddr != 0) {
+                        pci_unmap_page(adapter->pdev, busaddr,
+                                       wrb->frag_len, PCI_DMA_TODEVICE);
+                }
                 num_wrbs++;
                 queue_tail_inc(txq);
-        } while (cur_index != last_index);
+        }
 
         atomic_sub(num_wrbs, &txq->used);
-        skb_dma_unmap(&adapter->pdev->dev, sent_skb, DMA_TO_DEVICE);
+
         kfree_skb(sent_skb);
 }