qede: add Rx flow hash/indirection support.

Adds support for the following via ethtool:
  - UDP configuration of RSS based on 2-tuple/4-tuple.
  - RSS hash key.
  - RSS indirection table.

Signed-off-by: Sudarsana Reddy Kalluru <sudarsana.kalluru@qlogic.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 43 insertions, 9 deletions

diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c
index a55d93eb41fa..457caad2e752 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_main.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_main.c
@@ -2826,10 +2826,10 @@ static int qede_start_queues(struct qede_dev *edev)
 	int rc, tc, i;
 	int vlan_removal_en = 1;
 	struct qed_dev *cdev = edev->cdev;
-	struct qed_update_vport_rss_params *rss_params = &edev->rss_params;
 	struct qed_update_vport_params vport_update_params;
 	struct qed_queue_start_common_params q_params;
 	struct qed_start_vport_params start = {0};
+	bool reset_rss_indir = false;
 
 	if (!edev->num_rss) {
 		DP_ERR(edev,
@@ -2924,16 +2924,50 @@ static int qede_start_queues(struct qede_dev *edev)
 	/* Fill struct with RSS params */
 	if (QEDE_RSS_CNT(edev) > 1) {
 		vport_update_params.update_rss_flg = 1;
-		for (i = 0; i < 128; i++)
-			rss_params->rss_ind_table[i] =
-			ethtool_rxfh_indir_default(i, QEDE_RSS_CNT(edev));
-		netdev_rss_key_fill(rss_params->rss_key,
-				    sizeof(rss_params->rss_key));
+
+		/* Need to validate current RSS config uses valid entries */
+		for (i = 0; i < QED_RSS_IND_TABLE_SIZE; i++) {
+			if (edev->rss_params.rss_ind_table[i] >=
+			    edev->num_rss) {
+				reset_rss_indir = true;
+				break;
+			}
+		}
+
+		if (!(edev->rss_params_inited & QEDE_RSS_INDIR_INITED) ||
+		    reset_rss_indir) {
+			u16 val;
+
+			for (i = 0; i < QED_RSS_IND_TABLE_SIZE; i++) {
+				u16 indir_val;
+
+				val = QEDE_RSS_CNT(edev);
+				indir_val = ethtool_rxfh_indir_default(i, val);
+				edev->rss_params.rss_ind_table[i] = indir_val;
+			}
+			edev->rss_params_inited |= QEDE_RSS_INDIR_INITED;
+		}
+
+		if (!(edev->rss_params_inited & QEDE_RSS_KEY_INITED)) {
+			netdev_rss_key_fill(edev->rss_params.rss_key,
+					    sizeof(edev->rss_params.rss_key));
+			edev->rss_params_inited |= QEDE_RSS_KEY_INITED;
+		}
+
+		if (!(edev->rss_params_inited & QEDE_RSS_CAPS_INITED)) {
+			edev->rss_params.rss_caps = QED_RSS_IPV4 |
+						    QED_RSS_IPV6 |
+						    QED_RSS_IPV4_TCP |
+						    QED_RSS_IPV6_TCP;
+			edev->rss_params_inited |= QEDE_RSS_CAPS_INITED;
+		}
+
+		memcpy(&vport_update_params.rss_params, &edev->rss_params,
+		       sizeof(vport_update_params.rss_params));
 	} else {
-		memset(rss_params, 0, sizeof(*rss_params));
+		memset(&vport_update_params.rss_params, 0,
+		       sizeof(vport_update_params.rss_params));
 	}
-	memcpy(&vport_update_params.rss_params, rss_params,
-	       sizeof(*rss_params));
 
 	rc = edev->ops->vport_update(cdev, &vport_update_params);
 	if (rc) {