diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c index 3b1c914cbc506ab03854611452baad3fd2a34855..dce48bf64d9616beacb3ea9b081b6d7aea0730c2 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c @@ -815,9 +815,9 @@ int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos) return err; } -static int ixgbe_link_mbps(int internal_link_speed) +static int ixgbe_link_mbps(struct ixgbe_adapter *adapter) { - switch (internal_link_speed) { + switch (adapter->link_speed) { case IXGBE_LINK_SPEED_100_FULL: return 100; case IXGBE_LINK_SPEED_1GB_FULL: @@ -829,27 +829,30 @@ static int ixgbe_link_mbps(int internal_link_speed) } } -static void ixgbe_set_vf_rate_limit(struct ixgbe_hw *hw, int vf, int tx_rate, - int link_speed) +static void ixgbe_set_vf_rate_limit(struct ixgbe_adapter *adapter, int vf) { - int rf_dec, rf_int; - u32 bcnrc_val; + struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ]; + struct ixgbe_hw *hw = &adapter->hw; + u32 bcnrc_val = 0; + u16 queue, queues_per_pool; + u16 tx_rate = adapter->vfinfo[vf].tx_rate; + + if (tx_rate) { + /* start with base link speed value */ + bcnrc_val = adapter->vf_rate_link_speed; - if (tx_rate != 0) { /* Calculate the rate factor values to set */ - rf_int = link_speed / tx_rate; - rf_dec = (link_speed - (rf_int * tx_rate)); - rf_dec = (rf_dec * (1<mask); + + /* write value for all Tx queues belonging to VF */ + for (queue = 0; queue < queues_per_pool; queue++) { + unsigned int reg_idx = (vf * queues_per_pool) + queue; + + IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, reg_idx); + IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, bcnrc_val); + } } void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter) { - int actual_link_speed, i; - bool reset_rate = false; + int i; /* VF Tx rate limit was not set */ - if (adapter->vf_rate_link_speed == 0) + if (!adapter->vf_rate_link_speed) return; - actual_link_speed = ixgbe_link_mbps(adapter->link_speed); - if (actual_link_speed != adapter->vf_rate_link_speed) { - reset_rate = true; + if (ixgbe_link_mbps(adapter) != adapter->vf_rate_link_speed) { adapter->vf_rate_link_speed = 0; dev_info(&adapter->pdev->dev, - "Link speed has been changed. VF Transmit rate " - "is disabled\n"); + "Link speed has been changed. VF Transmit rate is disabled\n"); } for (i = 0; i < adapter->num_vfs; i++) { - if (reset_rate) + if (!adapter->vf_rate_link_speed) adapter->vfinfo[i].tx_rate = 0; - ixgbe_set_vf_rate_limit(&adapter->hw, i, - adapter->vfinfo[i].tx_rate, - actual_link_speed); + ixgbe_set_vf_rate_limit(adapter, i); } } int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate) { struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - int actual_link_speed; + int link_speed; - actual_link_speed = ixgbe_link_mbps(adapter->link_speed); - if ((vf >= adapter->num_vfs) || (!adapter->link_up) || - (tx_rate > actual_link_speed) || (actual_link_speed != 10000) || - ((tx_rate != 0) && (tx_rate <= 10))) - /* rate limit cannot be set to 10Mb or less in 10Gb adapters */ + /* verify VF is active */ + if (vf >= adapter->num_vfs) return -EINVAL; - adapter->vf_rate_link_speed = actual_link_speed; - adapter->vfinfo[vf].tx_rate = (u16)tx_rate; - ixgbe_set_vf_rate_limit(hw, vf, tx_rate, actual_link_speed); + /* verify link is up */ + if (!adapter->link_up) + return -EINVAL; + + /* verify we are linked at 10Gbps */ + link_speed = ixgbe_link_mbps(adapter); + if (link_speed != 10000) + return -EINVAL; + + /* rate limit cannot be less than 10Mbs or greater than link speed */ + if (tx_rate && ((tx_rate <= 10) || (tx_rate > link_speed))) + return -EINVAL; + + /* store values */ + adapter->vf_rate_link_speed = link_speed; + adapter->vfinfo[vf].tx_rate = tx_rate; + + /* update hardware configuration */ + ixgbe_set_vf_rate_limit(adapter, vf); return 0; }