ice: improve switchdev's slow-path

In current switchdev implementation, every VF PR is assigned to
individual ring on switchdev ctrl VSI. For slow-path traffic, there
is a mapping VF->ring done in software based on src_vsi value (by
calling ice_eswitch_get_target_netdev function).

With this change, HW solution is introduced which is more
efficient. For each VF, src MAC (VF's MAC) filter will be created,
which forwards packets to the corresponding switchdev ctrl VSI queue
based on src MAC address.

This filter has to be removed and then replayed in case of
resetting one VF. Keep information about this rule in repr->mac_rule,
thanks to that we know which rule has to be removed and replayed
for a given VF.

In case of CORE/GLOBAL all rules are removed
automatically. We have to take care of readding them. This is done
by ice_replay_vsi_adv_rule.

When driver leaves switchdev mode, remove all advanced rules
from switchdev ctrl VSI. This is done by ice_rem_adv_rule_for_vsi.

Flag repr->rule_added is needed because in some cases reset
might be triggered before VF sends request to add MAC.

Co-developed-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Signed-off-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 0 insertions, 80 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_fltr.c b/drivers/net/ethernet/intel/ice/ice_fltr.c
index 94903b450345..c29177c6bb9d 100644
--- a/drivers/net/ethernet/intel/ice/ice_fltr.c
+++ b/drivers/net/ethernet/intel/ice/ice_fltr.c
@@ -445,83 +445,3 @@ int ice_fltr_remove_eth(struct ice_vsi *vsi, u16 ethertype, u16 flag,
 	return ice_fltr_prepare_eth(vsi, ethertype, flag, action,
 				    ice_fltr_remove_eth_list);
 }
-
-/**
- * ice_fltr_update_rule_flags - update lan_en/lb_en flags
- * @hw: pointer to hw
- * @rule_id: id of rule being updated
- * @recipe_id: recipe id of rule
- * @act: current action field
- * @type: Rx or Tx
- * @src: source VSI
- * @new_flags: combinations of lb_en and lan_en
- */
-static int
-ice_fltr_update_rule_flags(struct ice_hw *hw, u16 rule_id, u16 recipe_id,
-			   u32 act, u16 type, u16 src, u32 new_flags)
-{
-	struct ice_aqc_sw_rules_elem *s_rule;
-	u32 flags_mask;
-	int err;
-
-	s_rule = kzalloc(ICE_SW_RULE_RX_TX_NO_HDR_SIZE, GFP_KERNEL);
-	if (!s_rule)
-		return -ENOMEM;
-
-	flags_mask = ICE_SINGLE_ACT_LB_ENABLE | ICE_SINGLE_ACT_LAN_ENABLE;
-	act &= ~flags_mask;
-	act |= (flags_mask & new_flags);
-
-	s_rule->pdata.lkup_tx_rx.recipe_id = cpu_to_le16(recipe_id);
-	s_rule->pdata.lkup_tx_rx.index = cpu_to_le16(rule_id);
-	s_rule->pdata.lkup_tx_rx.act = cpu_to_le32(act);
-
-	if (type & ICE_FLTR_RX) {
-		s_rule->pdata.lkup_tx_rx.src =
-			cpu_to_le16(hw->port_info->lport);
-		s_rule->type = cpu_to_le16(ICE_AQC_SW_RULES_T_LKUP_RX);
-
-	} else {
-		s_rule->pdata.lkup_tx_rx.src = cpu_to_le16(src);
-		s_rule->type = cpu_to_le16(ICE_AQC_SW_RULES_T_LKUP_TX);
-	}
-
-	err = ice_aq_sw_rules(hw, s_rule, ICE_SW_RULE_RX_TX_NO_HDR_SIZE, 1,
-			      ice_aqc_opc_update_sw_rules, NULL);
-
-	kfree(s_rule);
-	return err;
-}
-
-/**
- * ice_fltr_build_action - build action for rule
- * @vsi_id: id of VSI which is use to build action
- */
-static u32 ice_fltr_build_action(u16 vsi_id)
-{
-	return ((vsi_id << ICE_SINGLE_ACT_VSI_ID_S) & ICE_SINGLE_ACT_VSI_ID_M) |
-		ICE_SINGLE_ACT_VSI_FORWARDING | ICE_SINGLE_ACT_VALID_BIT;
-}
-
-/**
- * ice_fltr_update_flags_dflt_rule - update flags on default rule
- * @vsi: pointer to VSI
- * @rule_id: id of rule
- * @direction: Tx or Rx
- * @new_flags: flags to update
- *
- * Function updates flags on default rule with ICE_SW_LKUP_DFLT.
- *
- * Flags should be a combination of ICE_SINGLE_ACT_LB_ENABLE and
- * ICE_SINGLE_ACT_LAN_ENABLE.
- */
-int
-ice_fltr_update_flags_dflt_rule(struct ice_vsi *vsi, u16 rule_id, u8 direction,
-				u32 new_flags)
-{
-	u32 action = ice_fltr_build_action(vsi->vsi_num);
-	struct ice_hw *hw = &vsi->back->hw;
-
-	return ice_fltr_update_rule_flags(hw, rule_id, ICE_SW_LKUP_DFLT, action,
-					  direction, vsi->vsi_num, new_flags);
-}