Commit 492af0ab authored by Md Fahad Iqbal Polash's avatar Md Fahad Iqbal Polash Committed by Jeff Kirsher

ice: Implement ethtool hook for RSS switch

This patch implements ethtool hook for enabling/disabling
RSS. While disabling RSS, the LUT should be cleared. And
the LUT should be reconfigured while enabling RSS.
Signed-off-by: default avatarMd Fahad Iqbal Polash <md.fahad.iqbal.polash@intel.com>
Signed-off-by: default avatarAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent eb0208ec
......@@ -1222,6 +1222,38 @@ static void ice_vsi_map_rings_to_vectors(struct ice_vsi *vsi)
}
}
/**
* ice_vsi_manage_rss_lut - disable/enable RSS
* @vsi: the VSI being changed
* @ena: boolean value indicating if this is an enable or disable request
*
* In the event of disable request for RSS, this function will zero out RSS
* LUT, while in the event of enable request for RSS, it will reconfigure RSS
* LUT.
*/
int ice_vsi_manage_rss_lut(struct ice_vsi *vsi, bool ena)
{
int err = 0;
u8 *lut;
lut = devm_kzalloc(&vsi->back->pdev->dev, vsi->rss_table_size,
GFP_KERNEL);
if (!lut)
return -ENOMEM;
if (ena) {
if (vsi->rss_lut_user)
memcpy(lut, vsi->rss_lut_user, vsi->rss_table_size);
else
ice_fill_rss_lut(lut, vsi->rss_table_size,
vsi->rss_size);
}
err = ice_set_rss(vsi, NULL, lut, vsi->rss_table_size);
devm_kfree(&vsi->back->pdev->dev, lut);
return err;
}
/**
* ice_vsi_cfg_rss_lut_key - Configure RSS params for a VSI
* @vsi: VSI to be configured
......
......@@ -70,5 +70,7 @@ void ice_vsi_free_tx_rings(struct ice_vsi *vsi);
int ice_vsi_cfg_tc(struct ice_vsi *vsi, u8 ena_tc);
int ice_vsi_manage_rss_lut(struct ice_vsi *vsi, bool ena);
irqreturn_t ice_msix_clean_rings(int __always_unused irq, void *data);
#endif /* !_ICE_LIB_H_ */
......@@ -2412,6 +2412,12 @@ static int ice_set_features(struct net_device *netdev,
struct ice_vsi *vsi = np->vsi;
int ret = 0;
if (features & NETIF_F_RXHASH && !(netdev->features & NETIF_F_RXHASH))
ret = ice_vsi_manage_rss_lut(vsi, true);
else if (!(features & NETIF_F_RXHASH) &&
netdev->features & NETIF_F_RXHASH)
ret = ice_vsi_manage_rss_lut(vsi, false);
if ((features & NETIF_F_HW_VLAN_CTAG_RX) &&
!(netdev->features & NETIF_F_HW_VLAN_CTAG_RX))
ret = ice_vsi_manage_vlan_stripping(vsi, true);
......
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