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i40evf: Change a VF mac without reloading the VF driver

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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 <pawel.jablonski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Paweł Jabłoński 2018-08-20 08:12:26 -07:00 • committed by Jeff Kirsher
parent 6dba41cd02
commit ae1e29f671
2 changed files with 14 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
View file

@ -2458,7 +2458,7 @@ static inline int i40e_check_vf_permission(struct i40e_vf *vf,
!is_multicast_ether_addr(addr) && vf->pf_set_mac && !is_multicast_ether_addr(addr) && vf->pf_set_mac &&
!ether_addr_equal(addr, vf->default_lan_addr.addr)) { !ether_addr_equal(addr, vf->default_lan_addr.addr)) {
dev_err(&pf->pdev->dev, 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; return -EPERM;
} }
} }
@ -3873,9 +3873,11 @@ int i40e_ndo_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
mac, vf_id); 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); 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: error_param:
return ret; return ret;

11
drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c
View file

@ -1330,8 +1330,15 @@ void i40evf_virtchnl_completion(struct i40evf_adapter *adapter,
sizeof(struct virtchnl_vsi_resource); sizeof(struct virtchnl_vsi_resource);
memcpy(adapter->vf_res, msg, min(msglen, len)); memcpy(adapter->vf_res, msg, min(msglen, len));
i40e_vf_parse_hw_config(&adapter->hw, adapter->vf_res); i40e_vf_parse_hw_config(&adapter->hw, adapter->vf_res);
/* restore current mac address */ if (is_zero_ether_addr(adapter->hw.mac.addr)) {
ether_addr_copy(adapter->hw.mac.addr, netdev->dev_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); i40evf_process_config(adapter);
} }
break; break;