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Commit 21fddea2 authored by Michal Jaron's avatar Michal Jaron Committed by Greg Kroah-Hartman
Browse files

i40e: Fix VF set max MTU size 



[ Upstream commit 372539def2824c43b6afe2403045b140f65c5acc ]

Max MTU sent to VF is set to 0 during memory allocation. It cause
that max MTU on VF is changed to IAVF_MAX_RXBUFFER and does not
depend on data from HW.

Set max_mtu field in virtchnl_vf_resource struct to inform
VF in GET_VF_RESOURCES msg what size should be max frame.

Fixes: dab86afd ("i40e/i40evf: Change the way we limit the maximum frame size for Rx")
Signed-off-by: default avatarMichal Jaron <michalx.jaron@intel.com>
Signed-off-by: default avatarMateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: default avatarKonrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 8e9fb250

drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c

+20 −0
Original line number Diff line number Diff line
@@ -1712,6 +1712,25 @@ static void i40e_del_qch(struct i40e_vf *vf) 
	}

}



/**

 * i40e_vc_get_max_frame_size

 * @vf: pointer to the VF

 *

 * Max frame size is determined based on the current port's max frame size and

 * whether a port VLAN is configured on this VF. The VF is not aware whether

 * it's in a port VLAN so the PF needs to account for this in max frame size

 * checks and sending the max frame size to the VF.

 **/

static u16 i40e_vc_get_max_frame_size(struct i40e_vf *vf)

{

	u16 max_frame_size = vf->pf->hw.phy.link_info.max_frame_size;



	if (vf->port_vlan_id)

		max_frame_size -= VLAN_HLEN;



	return max_frame_size;

}



/**

 * i40e_vc_get_vf_resources_msg

 * @vf: pointer to the VF info
@@ -1814,6 +1833,7 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg) 
	vfres->max_vectors = pf->hw.func_caps.num_msix_vectors_vf;

	vfres->rss_key_size = I40E_HKEY_ARRAY_SIZE;

	vfres->rss_lut_size = I40E_VF_HLUT_ARRAY_SIZE;

	vfres->max_mtu = i40e_vc_get_max_frame_size(vf);



	if (vf->lan_vsi_idx) {

		vfres->vsi_res[0].vsi_id = vf->lan_vsi_id;