From: Mitch Williams Date: Mon, 12 Sep 2016 21:18:38 +0000 (-0700) Subject: i40evf: enable adaptive interrupt throttling X-Git-Tag: v4.14-rc1~2374^2~68^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f19a973f46e85d4394cadb90fa7717f7ec98197a;p=platform%2Fkernel%2Flinux-rpi.git i40evf: enable adaptive interrupt throttling All of the code to support adaptive interrupt throttling is already in the interrupt handler, it just needs to be enabled. Fill out the data structures properly to make it happen. Single-flow traffic tests may show slightly lower throughput, but interrupts per second will drop by about 75%. Change-ID: I9cd7d42c025b906bf1bb85c6aeb6112684aa6471 Signed-off-by: Mitch Williams Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c index 064419e..302c974 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c @@ -370,6 +370,8 @@ i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx) { struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx]; struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx]; + struct i40e_vsi *vsi = &adapter->vsi; + struct i40e_hw *hw = &adapter->hw; rx_ring->q_vector = q_vector; rx_ring->next = q_vector->rx.ring; @@ -377,7 +379,10 @@ i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx) q_vector->rx.ring = rx_ring; q_vector->rx.count++; q_vector->rx.latency_range = I40E_LOW_LATENCY; + q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting); + q_vector->ring_mask |= BIT(r_idx); q_vector->itr_countdown = ITR_COUNTDOWN_START; + wr32(hw, I40E_VFINT_ITRN1(I40E_RX_ITR, v_idx - 1), q_vector->rx.itr); } /** @@ -391,6 +396,8 @@ i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx) { struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx]; struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx]; + struct i40e_vsi *vsi = &adapter->vsi; + struct i40e_hw *hw = &adapter->hw; tx_ring->q_vector = q_vector; tx_ring->next = q_vector->tx.ring; @@ -398,9 +405,10 @@ i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx) q_vector->tx.ring = tx_ring; q_vector->tx.count++; q_vector->tx.latency_range = I40E_LOW_LATENCY; + q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting); q_vector->itr_countdown = ITR_COUNTDOWN_START; q_vector->num_ringpairs++; - q_vector->ring_mask |= BIT(t_idx); + wr32(hw, I40E_VFINT_ITRN1(I40E_TX_ITR, v_idx - 1), q_vector->tx.itr); } /** @@ -2269,10 +2277,8 @@ int i40evf_process_config(struct i40evf_adapter *adapter) adapter->vsi.back = adapter; adapter->vsi.base_vector = 1; adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK; - adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC | - ITR_REG_TO_USEC(I40E_ITR_RX_DEF)); - adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC | - ITR_REG_TO_USEC(I40E_ITR_TX_DEF)); + adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF); + adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF); vsi->netdev = adapter->netdev; vsi->qs_handle = adapter->vsi_res->qset_handle; if (vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF) {