diff options
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_sriov.c')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_sriov.c | 116 |
1 files changed, 112 insertions, 4 deletions
diff --git a/drivers/net/ixgbe/ixgbe_sriov.c b/drivers/net/ixgbe/ixgbe_sriov.c index 187b3a16ec1f..6e50d8328942 100644 --- a/drivers/net/ixgbe/ixgbe_sriov.c +++ b/drivers/net/ixgbe/ixgbe_sriov.c @@ -1,7 +1,7 @@ /******************************************************************************* Intel 10 Gigabit PCI Express Linux driver - Copyright(c) 1999 - 2010 Intel Corporation. + Copyright(c) 1999 - 2011 Intel Corporation. This program is free software; you can redistribute it and/or modify it under the terms and conditions of the GNU General Public License, @@ -110,6 +110,33 @@ static int ixgbe_set_vf_vlan(struct ixgbe_adapter *adapter, int add, int vid, return adapter->hw.mac.ops.set_vfta(&adapter->hw, vid, vf, (bool)add); } +void ixgbe_set_vf_lpe(struct ixgbe_adapter *adapter, u32 *msgbuf) +{ + struct ixgbe_hw *hw = &adapter->hw; + int new_mtu = msgbuf[1]; + u32 max_frs; + int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; + + /* Only X540 supports jumbo frames in IOV mode */ + if (adapter->hw.mac.type != ixgbe_mac_X540) + return; + + /* MTU < 68 is an error and causes problems on some kernels */ + if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE)) { + e_err(drv, "VF mtu %d out of range\n", new_mtu); + return; + } + + max_frs = (IXGBE_READ_REG(hw, IXGBE_MAXFRS) & + IXGBE_MHADD_MFS_MASK) >> IXGBE_MHADD_MFS_SHIFT; + if (max_frs < new_mtu) { + max_frs = new_mtu << IXGBE_MHADD_MFS_SHIFT; + IXGBE_WRITE_REG(hw, IXGBE_MAXFRS, max_frs); + } + + e_info(hw, "VF requests change max MTU to %d\n", new_mtu); +} + static void ixgbe_set_vmolr(struct ixgbe_hw *hw, u32 vf, bool aupe) { u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf)); @@ -302,7 +329,7 @@ static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf) hash_list, vf); break; case IXGBE_VF_SET_LPE: - WARN_ON((msgbuf[0] & 0xFFFF) == IXGBE_VF_SET_LPE); + ixgbe_set_vf_lpe(adapter, msgbuf); break; case IXGBE_VF_SET_VLAN: add = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK) @@ -451,9 +478,90 @@ out: return err; } +static int ixgbe_link_mbps(int internal_link_speed) +{ + switch (internal_link_speed) { + case IXGBE_LINK_SPEED_100_FULL: + return 100; + case IXGBE_LINK_SPEED_1GB_FULL: + return 1000; + case IXGBE_LINK_SPEED_10GB_FULL: + return 10000; + default: + return 0; + } +} + +static void ixgbe_set_vf_rate_limit(struct ixgbe_hw *hw, int vf, int tx_rate, + int link_speed) +{ + int rf_dec, rf_int; + u32 bcnrc_val; + + 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<<IXGBE_RTTBCNRC_RF_INT_SHIFT)) / tx_rate; + + bcnrc_val = IXGBE_RTTBCNRC_RS_ENA; + bcnrc_val |= ((rf_int<<IXGBE_RTTBCNRC_RF_INT_SHIFT) & + IXGBE_RTTBCNRC_RF_INT_MASK); + bcnrc_val |= (rf_dec & IXGBE_RTTBCNRC_RF_DEC_MASK); + } else { + bcnrc_val = 0; + } + + IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, 2*vf); /* vf Y uses queue 2*Y */ + 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; + + /* VF Tx rate limit was not set */ + if (adapter->vf_rate_link_speed == 0) + return; + + actual_link_speed = ixgbe_link_mbps(adapter->link_speed); + if (actual_link_speed != adapter->vf_rate_link_speed) { + reset_rate = true; + adapter->vf_rate_link_speed = 0; + dev_info(&adapter->pdev->dev, + "Link speed has been changed. VF Transmit rate " + "is disabled\n"); + } + + for (i = 0; i < adapter->num_vfs; i++) { + if (reset_rate) + adapter->vfinfo[i].tx_rate = 0; + + ixgbe_set_vf_rate_limit(&adapter->hw, i, + adapter->vfinfo[i].tx_rate, + actual_link_speed); + } +} + int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate) { - return -EOPNOTSUPP; + struct ixgbe_adapter *adapter = netdev_priv(netdev); + struct ixgbe_hw *hw = &adapter->hw; + int actual_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 */ + 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); + + return 0; } int ixgbe_ndo_get_vf_config(struct net_device *netdev, @@ -464,7 +572,7 @@ int ixgbe_ndo_get_vf_config(struct net_device *netdev, return -EINVAL; ivi->vf = vf; memcpy(&ivi->mac, adapter->vfinfo[vf].vf_mac_addresses, ETH_ALEN); - ivi->tx_rate = 0; + ivi->tx_rate = adapter->vfinfo[vf].tx_rate; ivi->vlan = adapter->vfinfo[vf].pf_vlan; ivi->qos = adapter->vfinfo[vf].pf_qos; return 0; |