qed/qede: Add setter APIs support for RX flow classification

This patch adds support for adding and deleting rx flow
classification rules. Using this user can classify RX flow
constituting of TCP/UDP 4-tuples [src_ip/dst_ip and src_port/dst_port]
to be steered on a given RX queue
Signed-off-by: Manish Chopra <manish.chopra@cavium.com>
Signed-off-by: Yuval Mintz <yuval.mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed_main.c

@@ -954,9 +954,7 @@ static int qed_slowpath_start(struct qed_dev *cdev,
 	struct qed_tunnel_info tunn_info;
 	const u8 *data = NULL;
 	struct qed_hwfn *hwfn;
-#ifdef CONFIG_RFS_ACCEL
 	struct qed_ptt *p_ptt;
-#endif
 	int rc = -EINVAL;
 
 	if (qed_iov_wq_start(cdev))
@@ -972,7 +970,6 @@ static int qed_slowpath_start(struct qed_dev *cdev,
 			goto err;
 		}
 
-#ifdef CONFIG_RFS_ACCEL
 		if (cdev->num_hwfns == 1) {
 			p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
 			if (p_ptt) {
@@ -983,7 +980,6 @@ static int qed_slowpath_start(struct qed_dev *cdev,
 				goto err;
 			}
 		}
-#endif
 	}
 
 	cdev->rx_coalesce_usecs = QED_DEFAULT_RX_USECS;
@@ -1091,12 +1087,10 @@ static int qed_slowpath_start(struct qed_dev *cdev,
 	if (IS_PF(cdev))
 		release_firmware(cdev->firmware);
 
-#ifdef CONFIG_RFS_ACCEL
 	if (IS_PF(cdev) && (cdev->num_hwfns == 1) &&
 	    QED_LEADING_HWFN(cdev)->p_arfs_ptt)
 		qed_ptt_release(QED_LEADING_HWFN(cdev),
 				QED_LEADING_HWFN(cdev)->p_arfs_ptt);
-#endif
 
 	qed_iov_wq_stop(cdev, false);
 
@@ -1111,11 +1105,9 @@ static int qed_slowpath_stop(struct qed_dev *cdev)
 	qed_ll2_dealloc_if(cdev);
 
 	if (IS_PF(cdev)) {
-#ifdef CONFIG_RFS_ACCEL
 		if (cdev->num_hwfns == 1)
 			qed_ptt_release(QED_LEADING_HWFN(cdev),
 					QED_LEADING_HWFN(cdev)->p_arfs_ptt);
-#endif
 		qed_free_stream_mem(cdev);
 		if (IS_QED_ETH_IF(cdev))
 			qed_sriov_disable(cdev, true);

drivers/net/ethernet/qlogic/qede/qede.h

@@ -447,16 +447,17 @@ struct qede_fastpath {
 #ifdef CONFIG_RFS_ACCEL
 int qede_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 		       u16 rxq_index, u32 flow_id);
+#define QEDE_SP_ARFS_CONFIG	4
+#define QEDE_SP_TASK_POLL_DELAY	(5 * HZ)
+#endif
+
 void qede_process_arfs_filters(struct qede_dev *edev, bool free_fltr);
 void qede_poll_for_freeing_arfs_filters(struct qede_dev *edev);
 void qede_arfs_filter_op(void *dev, void *filter, u8 fw_rc);
 void qede_free_arfs(struct qede_dev *edev);
 int qede_alloc_arfs(struct qede_dev *edev);
-
-#define QEDE_SP_ARFS_CONFIG	4
-#define QEDE_SP_TASK_POLL_DELAY	(5 * HZ)
-#endif
-
+int qede_add_cls_rule(struct qede_dev *edev, struct ethtool_rxnfc *info);
+int qede_del_cls_rule(struct qede_dev *edev, struct ethtool_rxnfc *info);
 int qede_get_cls_rule_entry(struct qede_dev *edev, struct ethtool_rxnfc *cmd);
 int qede_get_cls_rule_all(struct qede_dev *edev, struct ethtool_rxnfc *info,
 			  u32 *rule_locs);

drivers/net/ethernet/qlogic/qede/qede_ethtool.c

@@ -1182,14 +1182,24 @@ static int qede_set_rss_flags(struct qede_dev *edev, struct ethtool_rxnfc *info)
 static int qede_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info)
 {
 	struct qede_dev *edev = netdev_priv(dev);
+	int rc;
 
 	switch (info->cmd) {
 	case ETHTOOL_SRXFH:
-		return qede_set_rss_flags(edev, info);
+		rc = qede_set_rss_flags(edev, info);
+		break;
+	case ETHTOOL_SRXCLSRLINS:
+		rc = qede_add_cls_rule(edev, info);
+		break;
+	case ETHTOOL_SRXCLSRLDEL:
+		rc = qede_del_cls_rule(edev, info);
+		break;
 	default:
 		DP_INFO(edev, "Command parameters not supported\n");
-		return -EOPNOTSUPP;
+		rc = -EOPNOTSUPP;
 	}
+
+	return rc;
 }
 
 static u32 qede_get_rxfh_indir_size(struct net_device *dev)

drivers/net/ethernet/qlogic/qede/qede_main.c

@@ -873,9 +873,7 @@ static void qede_update_pf_params(struct qed_dev *cdev)
 	 */
 	pf_params.eth_pf_params.num_vf_cons = 48;
 
-#ifdef CONFIG_RFS_ACCEL
 	pf_params.eth_pf_params.num_arfs_filters = QEDE_RFS_MAX_FLTR;
-#endif
 	qed_ops->common->update_pf_params(cdev, &pf_params);
 }
 
@@ -1984,12 +1982,12 @@ static void qede_unload(struct qede_dev *edev, enum qede_unload_mode mode,
 
 	qede_vlan_mark_nonconfigured(edev);
 	edev->ops->fastpath_stop(edev->cdev);
-#ifdef CONFIG_RFS_ACCEL
+
 	if (!IS_VF(edev) && edev->dev_info.common.num_hwfns == 1) {
 		qede_poll_for_freeing_arfs_filters(edev);
 		qede_free_arfs(edev);
 	}
-#endif
+
 	/* Release the interrupts */
 	qede_sync_free_irqs(edev);
 	edev->ops->common->set_fp_int(edev->cdev, 0);
@@ -2041,13 +2039,12 @@ static int qede_load(struct qede_dev *edev, enum qede_load_mode mode,
 	if (rc)
 		goto err2;
 
-#ifdef CONFIG_RFS_ACCEL
 	if (!IS_VF(edev) && edev->dev_info.common.num_hwfns == 1) {
 		rc = qede_alloc_arfs(edev);
 		if (rc)
 			DP_NOTICE(edev, "aRFS memory allocation failed\n");
 	}
-#endif
+
 	qede_napi_add_enable(edev);
 	DP_INFO(edev, "Napi added and enabled\n");