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path: root/drivers/net/vmxnet3/vmxnet3_drv.c
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Diffstat (limited to 'drivers/net/vmxnet3/vmxnet3_drv.c')
-rw-r--r--drivers/net/vmxnet3/vmxnet3_drv.c101
1 files changed, 63 insertions, 38 deletions
diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index ce9d4f2c9776..e4a192b26423 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -744,28 +744,43 @@ vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
+ u32 buf_size;
- tbi = tq->buf_info + tq->tx_ring.next2fill;
- tbi->map_type = VMXNET3_MAP_PAGE;
- tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
- 0, skb_frag_size(frag),
- DMA_TO_DEVICE);
+ buf_offset = 0;
+ len = skb_frag_size(frag);
+ while (len) {
+ tbi = tq->buf_info + tq->tx_ring.next2fill;
+ if (len < VMXNET3_MAX_TX_BUF_SIZE) {
+ buf_size = len;
+ dw2 |= len;
+ } else {
+ buf_size = VMXNET3_MAX_TX_BUF_SIZE;
+ /* spec says that for TxDesc.len, 0 == 2^14 */
+ }
+ tbi->map_type = VMXNET3_MAP_PAGE;
+ tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
+ buf_offset, buf_size,
+ DMA_TO_DEVICE);
- tbi->len = skb_frag_size(frag);
+ tbi->len = buf_size;
- gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
- BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
+ gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
+ BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
- gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
- gdesc->dword[2] = cpu_to_le32(dw2 | skb_frag_size(frag));
- gdesc->dword[3] = 0;
+ gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
+ gdesc->dword[2] = cpu_to_le32(dw2);
+ gdesc->dword[3] = 0;
- dev_dbg(&adapter->netdev->dev,
- "txd[%u]: 0x%llu %u %u\n",
- tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
- le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
- vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
- dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
+ dev_dbg(&adapter->netdev->dev,
+ "txd[%u]: 0x%llu %u %u\n",
+ tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
+ le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
+ vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
+ dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
+
+ len -= buf_size;
+ buf_offset += buf_size;
+ }
}
ctx->eop_txd = gdesc;
@@ -886,6 +901,18 @@ vmxnet3_prepare_tso(struct sk_buff *skb,
}
}
+static int txd_estimate(const struct sk_buff *skb)
+{
+ int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
+ int i;
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
+
+ count += VMXNET3_TXD_NEEDED(skb_frag_size(frag));
+ }
+ return count;
+}
/*
* Transmits a pkt thru a given tq
@@ -914,9 +941,7 @@ vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
union Vmxnet3_GenericDesc tempTxDesc;
#endif
- /* conservatively estimate # of descriptors to use */
- count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) +
- skb_shinfo(skb)->nr_frags + 1;
+ count = txd_estimate(skb);
ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
@@ -1069,10 +1094,10 @@ vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
- BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
- return vmxnet3_tq_xmit(skb,
- &adapter->tx_queue[skb->queue_mapping],
- adapter, netdev);
+ BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
+ return vmxnet3_tq_xmit(skb,
+ &adapter->tx_queue[skb->queue_mapping],
+ adapter, netdev);
}
@@ -1218,8 +1243,8 @@ vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
skb_reserve(new_skb, NET_IP_ALIGN);
rbi->skb = new_skb;
rbi->dma_addr = pci_map_single(adapter->pdev,
- rbi->skb->data, rbi->len,
- PCI_DMA_FROMDEVICE);
+ rbi->skb->data, rbi->len,
+ PCI_DMA_FROMDEVICE);
rxd->addr = cpu_to_le64(rbi->dma_addr);
rxd->len = rbi->len;
@@ -1306,14 +1331,14 @@ rcd_done:
/* if needed, update the register */
if (unlikely(rq->shared->updateRxProd)) {
VMXNET3_WRITE_BAR0_REG(adapter,
- rxprod_reg[ring_idx] + rq->qid * 8,
- ring->next2fill);
+ rxprod_reg[ring_idx] + rq->qid * 8,
+ ring->next2fill);
rq->uncommitted[ring_idx] = 0;
}
vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
vmxnet3_getRxComp(rcd,
- &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
+ &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
}
return num_rxd;
@@ -1897,7 +1922,7 @@ vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
free_irq(adapter->pdev->irq, adapter->netdev);
break;
default:
- BUG_ON(true);
+ BUG();
}
}
@@ -2924,11 +2949,11 @@ vmxnet3_probe_device(struct pci_dev *pdev,
spin_lock_init(&adapter->cmd_lock);
adapter->shared = pci_alloc_consistent(adapter->pdev,
- sizeof(struct Vmxnet3_DriverShared),
- &adapter->shared_pa);
+ sizeof(struct Vmxnet3_DriverShared),
+ &adapter->shared_pa);
if (!adapter->shared) {
printk(KERN_ERR "Failed to allocate memory for %s\n",
- pci_name(pdev));
+ pci_name(pdev));
err = -ENOMEM;
goto err_alloc_shared;
}
@@ -2939,16 +2964,16 @@ vmxnet3_probe_device(struct pci_dev *pdev,
size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
adapter->tqd_start = pci_alloc_consistent(adapter->pdev, size,
- &adapter->queue_desc_pa);
+ &adapter->queue_desc_pa);
if (!adapter->tqd_start) {
printk(KERN_ERR "Failed to allocate memory for %s\n",
- pci_name(pdev));
+ pci_name(pdev));
err = -ENOMEM;
goto err_alloc_queue_desc;
}
adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
- adapter->num_tx_queues);
+ adapter->num_tx_queues);
adapter->pm_conf = kmalloc(sizeof(struct Vmxnet3_PMConf), GFP_KERNEL);
if (adapter->pm_conf == NULL) {
@@ -2994,7 +3019,7 @@ vmxnet3_probe_device(struct pci_dev *pdev,
adapter->dev_number = atomic_read(&devices_found);
- adapter->share_intr = irq_share_mode;
+ adapter->share_intr = irq_share_mode;
if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE &&
adapter->num_tx_queues != adapter->num_rx_queues)
adapter->share_intr = VMXNET3_INTR_DONTSHARE;
@@ -3040,7 +3065,7 @@ vmxnet3_probe_device(struct pci_dev *pdev,
if (err) {
printk(KERN_ERR "Failed to register adapter %s\n",
- pci_name(pdev));
+ pci_name(pdev));
goto err_register;
}
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