diff mbox series

[v3,3/7] net/bnxt: fix flow flush to sync with flow destroy

Message ID 20200107003735.96055-4-ajit.khaparde@broadcom.com (mailing list archive)
State Accepted, archived
Delegated to: Ajit Khaparde
Headers
Series bnxt patchset |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Ajit Khaparde Jan. 7, 2020, 12:37 a.m. UTC 
  From: Somnath Kotur <somnath.kotur@broadcom.com>

Sync flow flush routine with flow destroy so that the operations
performed per flow during a flush are the same as that are done for an
individual flow destroy by having a common function to call for both.
One of the things that was missed in the flow flush routine was the
deletion of the L2 filter that would have been created as part of an
n-tuple filter.
Also, decrement the l2_ref_cnt for a filter in the case of a filter
update as it would've bumped up previously in validate_and_parse_flow()

Fixes: 89278c59d97c58 ("net/bnxt: fix flow flush handling")
Cc: stable@dpdk.org

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Santoshkumar Karanappa Rastapur <santosh.rastapur@broadcom.com>
---
 drivers/net/bnxt/bnxt_flow.c | 132 ++++++++++++-----------------------
 1 file changed, 46 insertions(+), 86 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/bnxt/bnxt_flow.c b/drivers/net/bnxt/bnxt_flow.c
index 7bd6811f1..7343b7e7b 100644
--- a/drivers/net/bnxt/bnxt_flow.c
+++ b/drivers/net/bnxt/bnxt_flow.c
@@ -1536,10 +1536,13 @@  bnxt_update_filter(struct bnxt *bp, struct bnxt_filter_info *old_filter,
 	 * filter which points to the new destination queue and so we clear
 	 * the previous L2 filter. For ntuple filters, we are going to reuse
 	 * the old L2 filter and create new NTUPLE filter with this new
-	 * destination queue subsequently during bnxt_flow_create.
+	 * destination queue subsequently during bnxt_flow_create. So we
+	 * decrement the ref cnt of the L2 filter that would've been bumped
+	 * up previously in bnxt_validate_and_parse_flow as the old n-tuple
+	 * filter that was referencing it will be deleted now.
 	 */
+	bnxt_hwrm_clear_l2_filter(bp, old_filter);
 	if (new_filter->filter_type == HWRM_CFA_L2_FILTER) {
-		bnxt_hwrm_clear_l2_filter(bp, old_filter);
 		bnxt_hwrm_set_l2_filter(bp, new_filter->dst_id, new_filter);
 	} else {
 		if (new_filter->filter_type == HWRM_CFA_EM_FILTER)
@@ -1816,46 +1819,24 @@  static int bnxt_handle_tunnel_redirect_destroy(struct bnxt *bp,
 }
 
 static int
-bnxt_flow_destroy(struct rte_eth_dev *dev,
-		  struct rte_flow *flow,
-		  struct rte_flow_error *error)
+_bnxt_flow_destroy(struct bnxt *bp,
+		   struct rte_flow *flow,
+		    struct rte_flow_error *error)
 {
-	struct bnxt *bp = dev->data->dev_private;
 	struct bnxt_filter_info *filter;
 	struct bnxt_vnic_info *vnic;
 	int ret = 0;
 
-	bnxt_acquire_flow_lock(bp);
-	if (!flow) {
-		rte_flow_error_set(error, EINVAL,
-				   RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
-				   "Invalid flow: failed to destroy flow.");
-		bnxt_release_flow_lock(bp);
-		return -EINVAL;
-	}
-
 	filter = flow->filter;
 	vnic = flow->vnic;
 
-	if (!filter) {
-		rte_flow_error_set(error, EINVAL,
-				   RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
-				   "Invalid flow: failed to destroy flow.");
-		bnxt_release_flow_lock(bp);
-		return -EINVAL;
-	}
-
 	if (filter->filter_type == HWRM_CFA_TUNNEL_REDIRECT_FILTER &&
 	    filter->enables == filter->tunnel_type) {
-		ret = bnxt_handle_tunnel_redirect_destroy(bp,
-							  filter,
-							  error);
-		if (!ret) {
+		ret = bnxt_handle_tunnel_redirect_destroy(bp, filter, error);
+		if (!ret)
 			goto done;
-		} else {
-			bnxt_release_flow_lock(bp);
+		else
 			return ret;
-		}
 	}
 
 	ret = bnxt_match_filter(bp, filter);
@@ -1902,7 +1883,36 @@  bnxt_flow_destroy(struct rte_eth_dev *dev,
 				   "Failed to destroy flow.");
 	}
 
+	return ret;
+}
+
+static int
+bnxt_flow_destroy(struct rte_eth_dev *dev,
+		  struct rte_flow *flow,
+		  struct rte_flow_error *error)
+{
+	struct bnxt *bp = dev->data->dev_private;
+	int ret = 0;
+
+	bnxt_acquire_flow_lock(bp);
+	if (!flow) {
+		rte_flow_error_set(error, EINVAL,
+				   RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
+				   "Invalid flow: failed to destroy flow.");
+		bnxt_release_flow_lock(bp);
+		return -EINVAL;
+	}
+
+	if (!flow->filter) {
+		rte_flow_error_set(error, EINVAL,
+				   RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
+				   "Invalid flow: failed to destroy flow.");
+		bnxt_release_flow_lock(bp);
+		return -EINVAL;
+	}
+	ret = _bnxt_flow_destroy(bp, flow, error);
 	bnxt_release_flow_lock(bp);
+
 	return ret;
 }
 
@@ -1910,7 +1920,6 @@  static int
 bnxt_flow_flush(struct rte_eth_dev *dev, struct rte_flow_error *error)
 {
 	struct bnxt *bp = dev->data->dev_private;
-	struct bnxt_filter_info *filter = NULL;
 	struct bnxt_vnic_info *vnic;
 	struct rte_flow *flow;
 	unsigned int i;
@@ -1924,66 +1933,17 @@  bnxt_flow_flush(struct rte_eth_dev *dev, struct rte_flow_error *error)
 
 		while (!STAILQ_EMPTY(&vnic->flow_list)) {
 			flow = STAILQ_FIRST(&vnic->flow_list);
-			filter = flow->filter;
-
-			if (filter->filter_type ==
-			    HWRM_CFA_TUNNEL_REDIRECT_FILTER &&
-			    filter->enables == filter->tunnel_type) {
-				ret =
-				bnxt_handle_tunnel_redirect_destroy(bp,
-								    filter,
-								    error);
-				if (!ret) {
-					goto done;
-				} else {
-					bnxt_release_flow_lock(bp);
-					return ret;
-				}
-			}
-
-			if (filter->filter_type == HWRM_CFA_EM_FILTER)
-				ret = bnxt_hwrm_clear_em_filter(bp, filter);
-			if (filter->filter_type == HWRM_CFA_NTUPLE_FILTER)
-				ret = bnxt_hwrm_clear_ntuple_filter(bp, filter);
-			else if (i)
-				ret = bnxt_hwrm_clear_l2_filter(bp, filter);
-
-			if (ret) {
-				rte_flow_error_set
-					(error,
-					 -ret,
-					 RTE_FLOW_ERROR_TYPE_HANDLE,
-					 NULL,
-					 "Failed to flush flow in HW.");
-				bnxt_release_flow_lock(bp);
-				return -rte_errno;
-			}
-done:
-			STAILQ_REMOVE(&vnic->flow_list, flow,
-				      rte_flow, next);
-
-			STAILQ_REMOVE(&vnic->filter,
-				      filter,
-				      bnxt_filter_info,
-				      next);
-			bnxt_free_filter(bp, filter);
 
-			rte_free(flow);
+			if (!flow->filter)
+				continue;
 
-			/* If this was the last flow associated with this vnic,
-			 * switch the queue back to RSS pool.
-			 */
-			if (STAILQ_EMPTY(&vnic->flow_list)) {
-				rte_free(vnic->fw_grp_ids);
-				if (vnic->rx_queue_cnt > 1)
-					bnxt_hwrm_vnic_ctx_free(bp, vnic);
-				bnxt_hwrm_vnic_free(bp, vnic);
-				vnic->rx_queue_cnt = 0;
-			}
+			ret = _bnxt_flow_destroy(bp, flow, error);
+			if (ret)
+				break;
 		}
 	}
-
 	bnxt_release_flow_lock(bp);
+
 	return ret;
 }