diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/netxen/netxen_nic_init.c | 10 | ||||
| -rw-r--r-- | drivers/net/netxen/netxen_nic_main.c | 52 |
2 files changed, 25 insertions, 37 deletions
diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c index 37589265297..5f85ad686c9 100644 --- a/drivers/net/netxen/netxen_nic_init.c +++ b/drivers/net/netxen/netxen_nic_init.c @@ -1248,7 +1248,6 @@ int netxen_process_cmd_ring(unsigned long data) struct pci_dev *pdev; struct netxen_skb_frag *frag; u32 i; - struct sk_buff *skb = NULL; int done; spin_lock(&adapter->tx_lock); @@ -1278,9 +1277,8 @@ int netxen_process_cmd_ring(unsigned long data) while ((last_consumer != consumer) && (count1 < MAX_STATUS_HANDLE)) { buffer = &adapter->cmd_buf_arr[last_consumer]; pdev = adapter->pdev; - frag = &buffer->frag_array[0]; - skb = buffer->skb; - if (skb && (cmpxchg(&buffer->skb, skb, 0) == skb)) { + if (buffer->skb) { + frag = &buffer->frag_array[0]; pci_unmap_single(pdev, frag->dma, frag->length, PCI_DMA_TODEVICE); frag->dma = 0ULL; @@ -1293,8 +1291,8 @@ int netxen_process_cmd_ring(unsigned long data) } adapter->stats.skbfreed++; - dev_kfree_skb_any(skb); - skb = NULL; + dev_kfree_skb_any(buffer->skb); + buffer->skb = NULL; } else if (adapter->proc_cmd_buf_counter == 1) { adapter->stats.txnullskb++; } diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c index 2d75c710f62..cec9e04f51e 100644 --- a/drivers/net/netxen/netxen_nic_main.c +++ b/drivers/net/netxen/netxen_nic_main.c @@ -994,28 +994,6 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) return NETDEV_TX_OK; } - /* - * Everything is set up. Now, we just need to transmit it out. - * Note that we have to copy the contents of buffer over to - * right place. Later on, this can be optimized out by de-coupling the - * producer index from the buffer index. - */ - retry_getting_window: - spin_lock_bh(&adapter->tx_lock); - if (adapter->total_threads >= MAX_XMIT_PRODUCERS) { - spin_unlock_bh(&adapter->tx_lock); - /* - * Yield CPU - */ - if (!in_atomic()) - schedule(); - else { - for (i = 0; i < 20; i++) - cpu_relax(); /*This a nop instr on i386 */ - } - goto retry_getting_window; - } - local_producer = adapter->cmd_producer; /* There 4 fragments per descriptor */ no_of_desc = (frag_count + 3) >> 2; if (netdev->features & NETIF_F_TSO) { @@ -1029,16 +1007,19 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) } } } + + spin_lock_bh(&adapter->tx_lock); + if (adapter->total_threads >= MAX_XMIT_PRODUCERS) { + goto out_requeue; + } + local_producer = adapter->cmd_producer; k = adapter->cmd_producer; max_tx_desc_count = adapter->max_tx_desc_count; last_cmd_consumer = adapter->last_cmd_consumer; if ((k + no_of_desc) >= ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count : last_cmd_consumer)) { - netif_stop_queue(netdev); - adapter->flags |= NETXEN_NETDEV_STATUS; - spin_unlock_bh(&adapter->tx_lock); - return NETDEV_TX_BUSY; + goto out_requeue; } k = get_index_range(k, max_tx_desc_count, no_of_desc); adapter->cmd_producer = k; @@ -1091,6 +1072,8 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) adapter->max_tx_desc_count); hwdesc = &hw->cmd_desc_head[producer]; memset(hwdesc, 0, sizeof(struct cmd_desc_type0)); + pbuf = &adapter->cmd_buf_arr[producer]; + pbuf->skb = NULL; } frag = &skb_shinfo(skb)->frags[i - 1]; len = frag->size; @@ -1146,6 +1129,8 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) } /* copy the MAC/IP/TCP headers to the cmd descriptor list */ hwdesc = &hw->cmd_desc_head[producer]; + pbuf = &adapter->cmd_buf_arr[producer]; + pbuf->skb = NULL; /* copy the first 64 bytes */ memcpy(((void *)hwdesc) + 2, @@ -1154,6 +1139,8 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) if (more_hdr) { hwdesc = &hw->cmd_desc_head[producer]; + pbuf = &adapter->cmd_buf_arr[producer]; + pbuf->skb = NULL; /* copy the next 64 bytes - should be enough except * for pathological case */ @@ -1187,14 +1174,17 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) } adapter->stats.xmitfinished++; - spin_unlock_bh(&adapter->tx_lock); - netdev->trans_start = jiffies; - DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer); - - DPRINTK(INFO, "Done. Send\n"); + spin_unlock_bh(&adapter->tx_lock); return NETDEV_TX_OK; + +out_requeue: + netif_stop_queue(netdev); + adapter->flags |= NETXEN_NETDEV_STATUS; + + spin_unlock_bh(&adapter->tx_lock); + return NETDEV_TX_BUSY; } static void netxen_watchdog(unsigned long v) |