From 30eba97a3f076cf4e100b598ee9a1b1439b0cfaa Mon Sep 17 00:00:00 2001 From: Ayyappan Veeraiyan Date: Mon, 3 Mar 2008 15:03:52 -0800 Subject: [PATCH] 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 Signed-off-by: Auke Kok Acked-by: Waskiewicz Jr, Peter P Signed-off-by: Jeff Garzik --- drivers/net/ixgbe/ixgbe_ethtool.c | 15 ++++++++- drivers/net/ixgbe/ixgbe_main.c | 56 ++++++++++++++++++++++++++++--- 2 files changed, 66 insertions(+), 5 deletions(-) diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c index a119cbd8db..85b7d15e12 100644 --- a/drivers/net/ixgbe/ixgbe_ethtool.c +++ b/drivers/net/ixgbe/ixgbe_ethtool.c @@ -246,13 +246,26 @@ static int ixgbe_set_tx_csum(struct net_device *netdev, u32 data) static int ixgbe_set_tso(struct net_device *netdev, u32 data) { - if (data) { netdev->features |= NETIF_F_TSO; netdev->features |= NETIF_F_TSO6; } else { +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + struct ixgbe_adapter *adapter = netdev_priv(netdev); + int i; +#endif + netif_stop_queue(netdev); +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + for (i = 0; i < adapter->num_tx_queues; i++) + netif_stop_subqueue(netdev, i); +#endif netdev->features &= ~NETIF_F_TSO; netdev->features &= ~NETIF_F_TSO6; +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + for (i = 0; i < adapter->num_tx_queues; i++) + netif_start_subqueue(netdev, i); +#endif + netif_start_queue(netdev); } return 0; } diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index fecc8ea79e..fc1c226f57 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -256,16 +256,28 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter, * sees the new next_to_clean. */ smp_mb(); +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) && + !test_bit(__IXGBE_DOWN, &adapter->state)) { + netif_wake_subqueue(netdev, tx_ring->queue_index); + adapter->restart_queue++; + } +#else if (netif_queue_stopped(netdev) && !test_bit(__IXGBE_DOWN, &adapter->state)) { netif_wake_queue(netdev); adapter->restart_queue++; } +#endif } if (adapter->detect_tx_hung) if (ixgbe_check_tx_hang(adapter, tx_ring, eop, eop_desc)) +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + netif_stop_subqueue(netdev, tx_ring->queue_index); +#else netif_stop_queue(netdev); +#endif if (total_tx_packets >= tx_ring->work_limit) IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->eims_value); @@ -1812,7 +1824,11 @@ static void __devinit ixgbe_set_num_queues(struct ixgbe_adapter *adapter) case (IXGBE_FLAG_RSS_ENABLED): rss_m = 0xF; nrq = rss_i; +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + ntq = rss_i; +#else ntq = 1; +#endif break; case 0: default: @@ -1986,6 +2002,10 @@ try_msi: } out: +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + /* Notify the stack of the (possibly) reduced Tx Queue count. */ + adapter->netdev->egress_subqueue_count = adapter->num_tx_queues; +#endif return err; } @@ -2504,6 +2524,9 @@ static void ixgbe_watchdog(unsigned long data) struct net_device *netdev = adapter->netdev; bool link_up; u32 link_speed = 0; +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + int i; +#endif adapter->hw.mac.ops.check_link(&adapter->hw, &(link_speed), &link_up); @@ -2525,6 +2548,10 @@ static void ixgbe_watchdog(unsigned long data) netif_carrier_on(netdev); netif_wake_queue(netdev); +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + for (i = 0; i < adapter->num_tx_queues; i++) + netif_wake_subqueue(netdev, i); +#endif } else { /* Force detection of hung controller */ adapter->detect_tx_hung = true; @@ -2568,7 +2595,6 @@ static int ixgbe_tso(struct ixgbe_adapter *adapter, struct ixgbe_tx_buffer *tx_buffer_info; u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0; u32 mss_l4len_idx = 0, l4len; - *hdr_len = 0; if (skb_is_gso(skb)) { if (skb_header_cloned(skb)) { @@ -2852,7 +2878,11 @@ static int __ixgbe_maybe_stop_tx(struct net_device *netdev, { struct ixgbe_adapter *adapter = netdev_priv(netdev); +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + netif_stop_subqueue(netdev, tx_ring->queue_index); +#else netif_stop_queue(netdev); +#endif /* Herbert's original patch had: * smp_mb__after_netif_stop_queue(); * but since that doesn't exist yet, just open code it. */ @@ -2864,7 +2894,11 @@ static int __ixgbe_maybe_stop_tx(struct net_device *netdev, return -EBUSY; /* A reprieve! - use start_queue because it doesn't call schedule */ +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + netif_wake_subqueue(netdev, tx_ring->queue_index); +#else netif_wake_queue(netdev); +#endif ++adapter->restart_queue; return 0; } @@ -2885,15 +2919,18 @@ static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev) unsigned int len = skb->len; unsigned int first; unsigned int tx_flags = 0; - u8 hdr_len; - int tso; + u8 hdr_len = 0; + int r_idx = 0, tso; unsigned int mss = 0; int count = 0; unsigned int f; unsigned int nr_frags = skb_shinfo(skb)->nr_frags; len -= skb->data_len; +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + r_idx = (adapter->num_tx_queues - 1) & skb->queue_mapping; +#endif + tx_ring = &adapter->tx_ring[r_idx]; - tx_ring = adapter->tx_ring; if (skb->len <= 0) { dev_kfree_skb(skb); @@ -3078,7 +3115,11 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev, pci_set_master(pdev); +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES); +#else netdev = alloc_etherdev(sizeof(struct ixgbe_adapter)); +#endif if (!netdev) { err = -ENOMEM; goto err_alloc_etherdev; @@ -3164,6 +3205,9 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev, if (pci_using_dac) netdev->features |= NETIF_F_HIGHDMA; +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + netdev->features |= NETIF_F_MULTI_QUEUE; +#endif /* make sure the EEPROM is good */ if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) { @@ -3231,6 +3275,10 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev, netif_carrier_off(netdev); netif_stop_queue(netdev); +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + for (i = 0; i < adapter->num_tx_queues; i++) + netif_stop_subqueue(netdev, i); +#endif ixgbe_napi_add_all(adapter); -- 2.39.5