From: Md Fahad Iqbal Polash <md.fahad.iqbal.pol...@intel.com>
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: Md Fahad Iqbal Polash <md.fahad.iqbal.pol...@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkatarama...@intel.com>
Tested-by: Andrew Bowers <andrewx.bow...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
drivers/net/ethernet/intel/ice/ice_lib.c | 32 +++++++++++++++++++++++
drivers/net/ethernet/intel/ice/ice_lib.h | 2 ++
drivers/net/ethernet/intel/ice/ice_main.c | 6 +++++
3 files changed, 40 insertions(+)
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c
b/drivers/net/ethernet/intel/ice/ice_lib.c
index 8f7ee77cb70b..98e8b7096e47 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -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
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.h
b/drivers/net/ethernet/intel/ice/ice_lib.h
index 4265464ee3d3..2617afe01c82 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.h
+++ b/drivers/net/ethernet/intel/ice/ice_lib.h
@@ -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_ */
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c
b/drivers/net/ethernet/intel/ice/ice_main.c
index d9f30d15ad65..bb76a0bf2fd1 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -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);
--
2.17.1
