From ae1e29f671b467f3e9e9aa2b82ee40e4300ea810 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Pawe=C5=82=20Jab=C5=82o=C5=84ski?= Date: Mon, 20 Aug 2018 08:12:26 -0700 Subject: [PATCH] i40evf: Change a VF mac without reloading the VF driver MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Add possibility to change a VF mac address from host side without reloading the VF driver on the guest side. Without this patch it is not possible to change the VF mac because executing i40evf_virtchnl_completion function with VIRTCHNL_OP_GET_VF_RESOURCES opcode resets the VF mac address to previous value. Signed-off-by: Paweł Jabłoński Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 8 +++++--- drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c | 11 +++++++++-- 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index c6d24eaede18..f56c645588f3 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -2458,7 +2458,7 @@ static inline int i40e_check_vf_permission(struct i40e_vf *vf, !is_multicast_ether_addr(addr) && vf->pf_set_mac && !ether_addr_equal(addr, vf->default_lan_addr.addr)) { dev_err(&pf->pdev->dev, - "VF attempting to override administratively set MAC address, reload the VF driver to resume normal operation\n"); + "VF attempting to override administratively set MAC address, bring down and up the VF interface to resume normal operation\n"); return -EPERM; } } @@ -3873,9 +3873,11 @@ int i40e_ndo_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac) mac, vf_id); } - /* Force the VF driver stop so it has to reload with new MAC address */ + /* Force the VF interface down so it has to bring up with new MAC + * address + */ i40e_vc_disable_vf(vf); - dev_info(&pf->pdev->dev, "Reload the VF driver to make this change effective.\n"); + dev_info(&pf->pdev->dev, "Bring down and up the VF interface to make this change effective.\n"); error_param: return ret; diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c index 565677de5ba3..79b7be83b5c3 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c @@ -1330,8 +1330,15 @@ void i40evf_virtchnl_completion(struct i40evf_adapter *adapter, sizeof(struct virtchnl_vsi_resource); memcpy(adapter->vf_res, msg, min(msglen, len)); i40e_vf_parse_hw_config(&adapter->hw, adapter->vf_res); - /* restore current mac address */ - ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr); + if (is_zero_ether_addr(adapter->hw.mac.addr)) { + /* restore current mac address */ + ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr); + } else { + /* refresh current mac address if changed */ + ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr); + ether_addr_copy(netdev->perm_addr, + adapter->hw.mac.addr); + } i40evf_process_config(adapter); } break; -- 2.30.2