ixgbe: Introduce Multiqueue TX
Now that the irq vector code is in place, we can add the conditional multiqueue TX code in the driver. This requires the optional CONFIG_NETDEVICES_MULTIQUEUE=y and will not be enabled without it. Signed-off-by: Ayyappan Veeraiyan <ayyappan.veeraiyan@intel.com> Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com> Acked-by: Waskiewicz Jr, Peter P <peter.p.waskiewicz.jr@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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021230d40a
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30eba97a3f
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@ -246,13 +246,26 @@ static int ixgbe_set_tx_csum(struct net_device *netdev, u32 data)
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static int ixgbe_set_tso(struct net_device *netdev, u32 data)
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{
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if (data) {
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netdev->features |= NETIF_F_TSO;
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netdev->features |= NETIF_F_TSO6;
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} else {
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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struct ixgbe_adapter *adapter = netdev_priv(netdev);
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int i;
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#endif
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netif_stop_queue(netdev);
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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for (i = 0; i < adapter->num_tx_queues; i++)
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netif_stop_subqueue(netdev, i);
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#endif
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netdev->features &= ~NETIF_F_TSO;
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netdev->features &= ~NETIF_F_TSO6;
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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for (i = 0; i < adapter->num_tx_queues; i++)
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netif_start_subqueue(netdev, i);
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#endif
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netif_start_queue(netdev);
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}
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return 0;
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}
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@ -256,16 +256,28 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
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* sees the new next_to_clean.
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*/
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smp_mb();
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
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!test_bit(__IXGBE_DOWN, &adapter->state)) {
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netif_wake_subqueue(netdev, tx_ring->queue_index);
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adapter->restart_queue++;
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}
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#else
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if (netif_queue_stopped(netdev) &&
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!test_bit(__IXGBE_DOWN, &adapter->state)) {
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netif_wake_queue(netdev);
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adapter->restart_queue++;
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}
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#endif
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}
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if (adapter->detect_tx_hung)
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if (ixgbe_check_tx_hang(adapter, tx_ring, eop, eop_desc))
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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netif_stop_subqueue(netdev, tx_ring->queue_index);
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#else
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netif_stop_queue(netdev);
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#endif
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if (total_tx_packets >= tx_ring->work_limit)
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IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->eims_value);
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@ -1812,7 +1824,11 @@ static void __devinit ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
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case (IXGBE_FLAG_RSS_ENABLED):
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rss_m = 0xF;
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nrq = rss_i;
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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ntq = rss_i;
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#else
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ntq = 1;
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#endif
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break;
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case 0:
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default:
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@ -1986,6 +2002,10 @@ try_msi:
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}
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out:
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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/* Notify the stack of the (possibly) reduced Tx Queue count. */
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adapter->netdev->egress_subqueue_count = adapter->num_tx_queues;
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#endif
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return err;
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}
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@ -2504,6 +2524,9 @@ static void ixgbe_watchdog(unsigned long data)
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struct net_device *netdev = adapter->netdev;
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bool link_up;
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u32 link_speed = 0;
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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int i;
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#endif
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adapter->hw.mac.ops.check_link(&adapter->hw, &(link_speed), &link_up);
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@ -2525,6 +2548,10 @@ static void ixgbe_watchdog(unsigned long data)
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netif_carrier_on(netdev);
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netif_wake_queue(netdev);
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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for (i = 0; i < adapter->num_tx_queues; i++)
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netif_wake_subqueue(netdev, i);
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#endif
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} else {
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/* Force detection of hung controller */
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adapter->detect_tx_hung = true;
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@ -2568,7 +2595,6 @@ static int ixgbe_tso(struct ixgbe_adapter *adapter,
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struct ixgbe_tx_buffer *tx_buffer_info;
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u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
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u32 mss_l4len_idx = 0, l4len;
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*hdr_len = 0;
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if (skb_is_gso(skb)) {
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if (skb_header_cloned(skb)) {
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@ -2852,7 +2878,11 @@ static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
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{
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struct ixgbe_adapter *adapter = netdev_priv(netdev);
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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netif_stop_subqueue(netdev, tx_ring->queue_index);
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#else
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netif_stop_queue(netdev);
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#endif
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/* Herbert's original patch had:
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* smp_mb__after_netif_stop_queue();
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* but since that doesn't exist yet, just open code it. */
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@ -2864,7 +2894,11 @@ static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
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return -EBUSY;
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/* A reprieve! - use start_queue because it doesn't call schedule */
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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netif_wake_subqueue(netdev, tx_ring->queue_index);
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#else
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netif_wake_queue(netdev);
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#endif
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++adapter->restart_queue;
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return 0;
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}
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@ -2885,15 +2919,18 @@ static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
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unsigned int len = skb->len;
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unsigned int first;
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unsigned int tx_flags = 0;
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u8 hdr_len;
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int tso;
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u8 hdr_len = 0;
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int r_idx = 0, tso;
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unsigned int mss = 0;
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int count = 0;
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unsigned int f;
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unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
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len -= skb->data_len;
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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r_idx = (adapter->num_tx_queues - 1) & skb->queue_mapping;
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#endif
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tx_ring = &adapter->tx_ring[r_idx];
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tx_ring = adapter->tx_ring;
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if (skb->len <= 0) {
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dev_kfree_skb(skb);
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@ -3078,7 +3115,11 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
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pci_set_master(pdev);
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
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#else
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netdev = alloc_etherdev(sizeof(struct ixgbe_adapter));
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#endif
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if (!netdev) {
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err = -ENOMEM;
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goto err_alloc_etherdev;
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@ -3164,6 +3205,9 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
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if (pci_using_dac)
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netdev->features |= NETIF_F_HIGHDMA;
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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netdev->features |= NETIF_F_MULTI_QUEUE;
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#endif
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/* make sure the EEPROM is good */
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if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) {
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@ -3231,6 +3275,10 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
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netif_carrier_off(netdev);
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netif_stop_queue(netdev);
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#ifdef CONFIG_NETDEVICES_MULTIQUEUE
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for (i = 0; i < adapter->num_tx_queues; i++)
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netif_stop_subqueue(netdev, i);
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#endif
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ixgbe_napi_add_all(adapter);
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