From 4fc82adfb01bdee79ec21e44557dc409ef31419a Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 27 Oct 2009 23:45:42 +0000 Subject: igb: add support for seperate tx-usecs setting in ethtool This patch adds support for a seperate tx-usecs interrupt moderation setting in ethtool which is supported when tx and rx interrupt vectors are sperated. Signed-off-by: Alexander Duyck Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/igb/igb.h | 5 +++-- drivers/net/igb/igb_ethtool.c | 49 ++++++++++++++++++++++++++++++++----------- drivers/net/igb/igb_main.c | 22 ++++++++++++------- 3 files changed, 54 insertions(+), 22 deletions(-) (limited to 'drivers/net/igb') diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h index 6c35c90..bef8cdc1 100644 --- a/drivers/net/igb/igb.h +++ b/drivers/net/igb/igb.h @@ -249,8 +249,8 @@ struct igb_adapter { unsigned int total_rx_bytes; unsigned int total_rx_packets; /* Interrupt Throttle Rate */ - u32 itr; - u32 itr_setting; + u32 rx_itr_setting; + u32 tx_itr_setting; u16 tx_itr; u16 rx_itr; @@ -321,6 +321,7 @@ struct igb_adapter { #define IGB_FLAG_HAS_MSI (1 << 0) #define IGB_FLAG_DCA_ENABLED (1 << 1) #define IGB_FLAG_QUAD_PORT_A (1 << 2) +#define IGB_FLAG_QUEUE_PAIRS (1 << 3) enum e1000_state_t { __IGB_TESTING, diff --git a/drivers/net/igb/igb_ethtool.c b/drivers/net/igb/igb_ethtool.c index 048a615..84fe25a 100644 --- a/drivers/net/igb/igb_ethtool.c +++ b/drivers/net/igb/igb_ethtool.c @@ -1827,18 +1827,37 @@ static int igb_set_coalesce(struct net_device *netdev, (ec->rx_coalesce_usecs == 2)) return -EINVAL; + if ((ec->tx_coalesce_usecs > IGB_MAX_ITR_USECS) || + ((ec->tx_coalesce_usecs > 3) && + (ec->tx_coalesce_usecs < IGB_MIN_ITR_USECS)) || + (ec->tx_coalesce_usecs == 2)) + return -EINVAL; + + if ((adapter->flags & IGB_FLAG_QUEUE_PAIRS) && ec->tx_coalesce_usecs) + return -EINVAL; + /* convert to rate of irq's per second */ - if (ec->rx_coalesce_usecs && ec->rx_coalesce_usecs <= 3) { - adapter->itr_setting = ec->rx_coalesce_usecs; - adapter->itr = IGB_START_ITR; - } else { - adapter->itr_setting = ec->rx_coalesce_usecs << 2; - adapter->itr = adapter->itr_setting; - } + if (ec->rx_coalesce_usecs && ec->rx_coalesce_usecs <= 3) + adapter->rx_itr_setting = ec->rx_coalesce_usecs; + else + adapter->rx_itr_setting = ec->rx_coalesce_usecs << 2; + + /* convert to rate of irq's per second */ + if (adapter->flags & IGB_FLAG_QUEUE_PAIRS) + adapter->tx_itr_setting = adapter->rx_itr_setting; + else if (ec->tx_coalesce_usecs && ec->tx_coalesce_usecs <= 3) + adapter->tx_itr_setting = ec->tx_coalesce_usecs; + else + adapter->tx_itr_setting = ec->tx_coalesce_usecs << 2; for (i = 0; i < adapter->num_q_vectors; i++) { struct igb_q_vector *q_vector = adapter->q_vector[i]; - q_vector->itr_val = adapter->itr; + if (q_vector->rx_ring) + q_vector->itr_val = adapter->rx_itr_setting; + else + q_vector->itr_val = adapter->tx_itr_setting; + if (q_vector->itr_val && q_vector->itr_val <= 3) + q_vector->itr_val = IGB_START_ITR; q_vector->set_itr = 1; } @@ -1850,15 +1869,21 @@ static int igb_get_coalesce(struct net_device *netdev, { struct igb_adapter *adapter = netdev_priv(netdev); - if (adapter->itr_setting <= 3) - ec->rx_coalesce_usecs = adapter->itr_setting; + if (adapter->rx_itr_setting <= 3) + ec->rx_coalesce_usecs = adapter->rx_itr_setting; else - ec->rx_coalesce_usecs = adapter->itr_setting >> 2; + ec->rx_coalesce_usecs = adapter->rx_itr_setting >> 2; + + if (!(adapter->flags & IGB_FLAG_QUEUE_PAIRS)) { + if (adapter->tx_itr_setting <= 3) + ec->tx_coalesce_usecs = adapter->tx_itr_setting; + else + ec->tx_coalesce_usecs = adapter->tx_itr_setting >> 2; + } return 0; } - static int igb_nway_reset(struct net_device *netdev) { struct igb_adapter *adapter = netdev_priv(netdev); diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index c9fda11..5724ac8 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -734,6 +734,8 @@ msi_only: dev_info(&adapter->pdev->dev, "IOV Disabled\n"); } #endif + adapter->vfs_allocated_count = 0; + adapter->flags |= IGB_FLAG_QUEUE_PAIRS; adapter->num_rx_queues = 1; adapter->num_tx_queues = 1; adapter->num_q_vectors = 1; @@ -791,7 +793,9 @@ static void igb_map_rx_ring_to_vector(struct igb_adapter *adapter, q_vector = adapter->q_vector[v_idx]; q_vector->rx_ring = &adapter->rx_ring[ring_idx]; q_vector->rx_ring->q_vector = q_vector; - q_vector->itr_val = adapter->itr; + q_vector->itr_val = adapter->rx_itr_setting; + if (q_vector->itr_val && q_vector->itr_val <= 3) + q_vector->itr_val = IGB_START_ITR; } static void igb_map_tx_ring_to_vector(struct igb_adapter *adapter, @@ -802,7 +806,9 @@ static void igb_map_tx_ring_to_vector(struct igb_adapter *adapter, q_vector = adapter->q_vector[v_idx]; q_vector->tx_ring = &adapter->tx_ring[ring_idx]; q_vector->tx_ring->q_vector = q_vector; - q_vector->itr_val = adapter->itr; + q_vector->itr_val = adapter->tx_itr_setting; + if (q_vector->itr_val && q_vector->itr_val <= 3) + q_vector->itr_val = IGB_START_ITR; } /** @@ -1597,9 +1603,6 @@ static int __devinit igb_probe(struct pci_dev *pdev, hw->fc.requested_mode = e1000_fc_default; hw->fc.current_mode = e1000_fc_default; - adapter->itr_setting = IGB_DEFAULT_ITR; - adapter->itr = IGB_START_ITR; - igb_validate_mdi_setting(hw); /* Initial Wake on LAN setting If APM wake is enabled in the EEPROM, @@ -1854,6 +1857,9 @@ static int __devinit igb_sw_init(struct igb_adapter *adapter) adapter->tx_ring_count = IGB_DEFAULT_TXD; adapter->rx_ring_count = IGB_DEFAULT_RXD; + adapter->rx_itr_setting = IGB_DEFAULT_ITR; + adapter->tx_itr_setting = IGB_DEFAULT_ITR; + adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; @@ -3052,7 +3058,6 @@ enum latency_range { latency_invalid = 255 }; - /** * igb_update_ring_itr - update the dynamic ITR value based on packet size * @@ -3216,7 +3221,7 @@ static void igb_set_itr(struct igb_adapter *adapter) current_itr = max(adapter->rx_itr, adapter->tx_itr); /* conservative mode (itr 3) eliminates the lowest_latency setting */ - if (adapter->itr_setting == 3 && current_itr == lowest_latency) + if (adapter->rx_itr_setting == 3 && current_itr == lowest_latency) current_itr = low_latency; switch (current_itr) { @@ -4577,7 +4582,8 @@ static inline void igb_ring_irq_enable(struct igb_q_vector *q_vector) struct igb_adapter *adapter = q_vector->adapter; struct e1000_hw *hw = &adapter->hw; - if (adapter->itr_setting & 3) { + if ((q_vector->rx_ring && (adapter->rx_itr_setting & 3)) || + (!q_vector->rx_ring && (adapter->tx_itr_setting & 3))) { if (!adapter->msix_entries) igb_set_itr(adapter); else -- cgit v1.1