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i40e: Fix VF set max MTU size

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[ 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: dab86afdbb ("i40e/i40evf: Change the way we limit the maximum frame size for Rx")
Signed-off-by: Michal Jaron <michalx.jaron@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Michal Jaron 2022-09-13 15:38:36 +02:00 committed by Greg Kroah-Hartman
parent 3daf097819
commit 450d106804
1 changed files with 20 additions and 0 deletions
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20
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
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@ -1873,6 +1873,25 @@ 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
@ -1973,6 +1992,7 @@ 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;