ice: Add flow director support for channel mode

Add support to enable flow-director filter when multiple TCs are
configured. Flow director filter can be configured using ethtool
(--config-ntuple option). When multiple TCs are configured, each
TC is mapped to an unique HW VSI. So VSI corresponding to queue
used in filter is identified and flow director context is updated
with correct VSI while configuring ntuple filter in HW.

Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
Signed-off-by: Sudheer Mogilappagari <sudheer.mogilappagari@intel.com>
Tested-by: Bharathi Sreenivas <bharathi.sreenivas@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 51 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_flow.c b/drivers/net/ethernet/intel/ice/ice_flow.c
index 2c5332953679..beed4838dcbe 100644
--- a/drivers/net/ethernet/intel/ice/ice_flow.c
+++ b/drivers/net/ethernet/intel/ice/ice_flow.c
@@ -1806,6 +1806,57 @@ ice_flow_add_fld_raw(struct ice_flow_seg_info *seg, u16 off, u8 len,
 	seg->raws_cnt++;
 }
 
+/**
+ * ice_flow_rem_vsi_prof - remove VSI from flow profile
+ * @hw: pointer to the hardware structure
+ * @vsi_handle: software VSI handle
+ * @prof_id: unique ID to identify this flow profile
+ *
+ * This function removes the flow entries associated to the input
+ * VSI handle and disassociate the VSI from the flow profile.
+ */
+int ice_flow_rem_vsi_prof(struct ice_hw *hw, u16 vsi_handle, u64 prof_id)
+{
+	struct ice_flow_prof *prof;
+	int status = 0;
+
+	if (!ice_is_vsi_valid(hw, vsi_handle))
+		return -EINVAL;
+
+	/* find flow profile pointer with input package block and profile ID */
+	prof = ice_flow_find_prof_id(hw, ICE_BLK_FD, prof_id);
+	if (!prof) {
+		ice_debug(hw, ICE_DBG_PKG, "Cannot find flow profile id=%llu\n",
+			  prof_id);
+		return -ENOENT;
+	}
+
+	/* Remove all remaining flow entries before removing the flow profile */
+	if (!list_empty(&prof->entries)) {
+		struct ice_flow_entry *e, *t;
+
+		mutex_lock(&prof->entries_lock);
+		list_for_each_entry_safe(e, t, &prof->entries, l_entry) {
+			if (e->vsi_handle != vsi_handle)
+				continue;
+
+			status = ice_flow_rem_entry_sync(hw, ICE_BLK_FD, e);
+			if (status)
+				break;
+		}
+		mutex_unlock(&prof->entries_lock);
+	}
+	if (status)
+		return status;
+
+	/* disassociate the flow profile from sw VSI handle */
+	status = ice_flow_disassoc_prof(hw, ICE_BLK_FD, prof, vsi_handle);
+	if (status)
+		ice_debug(hw, ICE_DBG_PKG, "ice_flow_disassoc_prof() failed with status=%d\n",
+			  status);
+	return status;
+}
+
 #define ICE_FLOW_RSS_SEG_HDR_L2_MASKS \
 	(ICE_FLOW_SEG_HDR_ETH | ICE_FLOW_SEG_HDR_VLAN)