dpaa2-eth: install a single steering rule when SHARED_FS is enabled

When SHARED_FS is enabled on a DPNI object the flow steering tables are
shared between all the traffic classes. Modify the driver so that we
only add a new flow steering entry on the TC#0 when this new option is
enabled.

Signed-off-by: Ionut-robert Aron <ionut-robert.aron@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: Ionut-robert Aron

drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c

@@ -3454,6 +3454,12 @@ static int dpaa2_eth_config_hash_key(struct dpaa2_eth_priv *priv, dma_addr_t key
 			dev_err(dev, "dpni_set_rx_hash_dist failed\n");
 			break;
 		}
+
+		/* If the flow steering / hashing key is shared between all
+		 * traffic classes, install it just once
+		 */
+		if (priv->dpni_attrs.options & DPNI_OPT_SHARED_FS)
+			break;
 	}
 
 	return err;
@@ -3480,6 +3486,12 @@ static int dpaa2_eth_config_cls_key(struct dpaa2_eth_priv *priv, dma_addr_t key)
 			dev_err(dev, "dpni_set_rx_fs_dist failed\n");
 			break;
 		}
+
+		/* If the flow steering / hashing key is shared between all
+		 * traffic classes, install it just once
+		 */
+		if (priv->dpni_attrs.options & DPNI_OPT_SHARED_FS)
+			break;
 	}
 
 	return err;

drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c

@@ -618,7 +618,7 @@ static int dpaa2_eth_do_cls_rule(struct net_device *net_dev,
 			err = dpni_remove_fs_entry(priv->mc_io, 0,
 						   priv->mc_token, i,
 						   &rule_cfg);
-		if (err)
+		if (err || priv->dpni_attrs.options & DPNI_OPT_SHARED_FS)
 			break;
 	}
 

drivers/net/ethernet/freescale/dpaa2/dpni.h

@@ -75,6 +75,10 @@ struct fsl_mc_io;
  * Disables the flow steering table.
  */
 #define DPNI_OPT_NO_FS				0x000020
+/**
+ * Flow steering table is shared between all traffic classes
+ */
+#define DPNI_OPT_SHARED_FS			0x001000
 
 int dpni_open(struct fsl_mc_io	*mc_io,
 	      u32		cmd_flags,