net/mvpp2: support DSA mode

Extend the config file with 'dsa-mode' field.
Currently 'eth' (default) and 'dsa' headers are supported.

Signed-off-by: Liron Himi <lironh@marvell.com>

doc/guides/nics/mvpp2.rst

@@ -40,7 +40,7 @@ Features of the MVPP2 PMD are:
 - :ref:`Extended stats <extstats>`
 - RX flow control
 - Scattered TX frames
-- :ref:`QoS <qossupport>`
+- :ref:`QoS <extconf>`
 - :ref:`Flow API <flowapi>`
 - :ref:`Traffic metering and policing <mtrapi>`
 - :ref:`Traffic Management API <tmapi>`
@@ -188,12 +188,12 @@ MVPP2 PMD supports the following extended statistics:
 	- ``tx_errors``: number of TX MAC errors
 
 
-.. _qossupport:
+.. _extconf:
 
-QoS Configuration
------------------
+External Configuration
+----------------------
 
-QoS configuration is done through external configuration file. Path to the
+Several driver configuration (e.g. QoS) can be done through external configuration file. Path to the
 file must be given as `cfg` in driver's vdev parameter list.
 
 Configuration syntax
@@ -209,6 +209,7 @@ Configuration syntax
    cbs = <cbs>
 
    [port <portnum> default]
+   dsa_mode = <dsa_mode>
    default_tc = <default_tc>
    mapping_priority = <mapping_priority>
 
@@ -241,6 +242,8 @@ Where:
 
 - ``<portnum>``: DPDK Port number (0..n).
 
+- ``<dsa_mode>``: Indicate what is the dsa header mode (`none`, `dsa`, or `ext_dsa`).
+
 - ``<default_tc>``: Default traffic class (e.g. 0)
 
 - ``<mapping_priority>``: QoS priority for mapping (`ip`, `vlan`, `ip/vlan` or `vlan/ip`).
@@ -537,7 +540,7 @@ MVPP2 PMD supports DPDK traffic metering and policing that allows the following:
 
 For an additional description please refer to DPDK :doc:`Traffic Metering and Policing API <../prog_guide/traffic_metering_and_policing>`.
 
-The policer objects defined by this feature can work with the default policer defined via config file as described in :ref:`QoS Support <qossupport>`.
+The policer objects defined by this feature can work with the default policer defined via config file as described in :ref:`QoS Support <extconf>`.
 
 Limitations
 ~~~~~~~~~~~

drivers/net/mvpp2/mrvl_ethdev.c

@@ -689,6 +689,10 @@ mrvl_dev_start(struct rte_eth_dev *dev)
 	snprintf(match, sizeof(match), "ppio-%d:%d",
 		 priv->pp_id, priv->ppio_id);
 	priv->ppio_params.match = match;
+	priv->ppio_params.eth_start_hdr = PP2_PPIO_HDR_ETH;
+	if (mrvl_qos_cfg)
+		priv->ppio_params.eth_start_hdr =
+			mrvl_qos_cfg->port[dev->data->port_id].eth_start_hdr;
 
 	/*
 	 * Calculate the minimum bpool size for refill feature as follows:

drivers/net/mvpp2/mrvl_qos.c

@@ -19,6 +19,10 @@
 
 /* Parsing tokens. Defined conveniently, so that any correction is easy. */
 #define MRVL_TOK_DEFAULT "default"
+#define MRVL_TOK_DSA_MODE "dsa_mode"
+#define MRVL_TOK_DSA_MODE_NONE "none"
+#define MRVL_TOK_DSA_MODE_DSA "dsa"
+#define MRVL_TOK_DSA_MODE_EXT_DSA "ext_dsa"
 #define MRVL_TOK_DEFAULT_TC "default_tc"
 #define MRVL_TOK_DSCP "dscp"
 #define MRVL_TOK_MAPPING_PRIORITY "mapping_priority"
@@ -494,16 +498,19 @@ mrvl_get_qoscfg(const char *key __rte_unused, const char *path,
 	const char *entry;
 	char sec_name[32];
 
-	if (file == NULL)
-		rte_exit(EXIT_FAILURE, "Cannot load configuration %s\n", path);
+	if (file == NULL) {
+		MRVL_LOG(ERR, "Cannot load configuration %s\n", path);
+		return -1;
+	}
 
 	/* Create configuration. This is never accessed on the fast path,
 	 * so we can ignore socket.
 	 */
 	*cfg = rte_zmalloc("mrvl_qos_cfg", sizeof(struct mrvl_qos_cfg), 0);
-	if (*cfg == NULL)
-		rte_exit(EXIT_FAILURE, "Cannot allocate configuration %s\n",
-			path);
+	if (*cfg == NULL) {
+		MRVL_LOG(ERR, "Cannot allocate configuration %s\n", path);
+		return -1;
+	}
 
 	n = rte_cfgfile_num_sections(file, MRVL_TOK_PORT,
 		sizeof(MRVL_TOK_PORT) - 1);
@@ -528,6 +535,31 @@ mrvl_get_qoscfg(const char *key __rte_unused, const char *path,
 			continue;
 		}
 
+		entry = rte_cfgfile_get_entry(file, sec_name,
+				MRVL_TOK_DSA_MODE);
+		if (entry) {
+			if (!strncmp(entry, MRVL_TOK_DSA_MODE_NONE,
+				sizeof(MRVL_TOK_DSA_MODE_NONE)))
+				(*cfg)->port[n].eth_start_hdr =
+				PP2_PPIO_HDR_ETH;
+			else if (!strncmp(entry, MRVL_TOK_DSA_MODE_DSA,
+				sizeof(MRVL_TOK_DSA_MODE_DSA)))
+				(*cfg)->port[n].eth_start_hdr =
+				PP2_PPIO_HDR_ETH_DSA;
+			else if (!strncmp(entry, MRVL_TOK_DSA_MODE_EXT_DSA,
+				sizeof(MRVL_TOK_DSA_MODE_EXT_DSA))) {
+				(*cfg)->port[n].eth_start_hdr =
+				PP2_PPIO_HDR_ETH_EXT_DSA;
+			} else {
+				MRVL_LOG(ERR,
+					"Error in parsing %s value (%s)!\n",
+					MRVL_TOK_DSA_MODE, entry);
+				return -1;
+			}
+		} else {
+			(*cfg)->port[n].eth_start_hdr = PP2_PPIO_HDR_ETH;
+		}
+
 		/*
 		 * Read per-port rate limiting. Setting that will
 		 * disable per-queue rate limiting.
@@ -575,13 +607,15 @@ mrvl_get_qoscfg(const char *key __rte_unused, const char *path,
 				(*cfg)->port[n].mapping_priority =
 					PP2_CLS_QOS_TBL_IP_PRI;
 			else if (!strncmp(entry, MRVL_TOK_VLAN,
-				sizeof(MRVL_TOK_VLAN)))
+				sizeof(MRVL_TOK_VLAN))) {
 				(*cfg)->port[n].mapping_priority =
 					PP2_CLS_QOS_TBL_VLAN_PRI;
-			else
-				rte_exit(EXIT_FAILURE,
+			} else {
+				MRVL_LOG(ERR,
 					"Error in parsing %s value (%s)!\n",
 					MRVL_TOK_MAPPING_PRIORITY, entry);
+				return -1;
+			}
 		} else {
 			(*cfg)->port[n].mapping_priority =
 				PP2_CLS_QOS_TBL_VLAN_IP_PRI;
@@ -604,18 +638,22 @@ mrvl_get_qoscfg(const char *key __rte_unused, const char *path,
 
 		for (i = 0; i < MRVL_PP2_RXQ_MAX; ++i) {
 			ret = get_outq_cfg(file, n, i, *cfg);
-			if (ret < 0)
-				rte_exit(EXIT_FAILURE,
+			if (ret < 0) {
+				MRVL_LOG(ERR,
 					"Error %d parsing port %d outq %d!\n",
 					ret, n, i);
+				return -1;
+			}
 		}
 
 		for (i = 0; i < MRVL_PP2_TC_MAX; ++i) {
 			ret = parse_tc_cfg(file, n, i, *cfg);
-			if (ret < 0)
-				rte_exit(EXIT_FAILURE,
+			if (ret < 0) {
+				MRVL_LOG(ERR,
 					"Error %d parsing port %d tc %d!\n",
 					ret, n, i);
+				return -1;
+			}
 		}
 
 		entry = rte_cfgfile_get_entry(file, sec_name,
@@ -628,7 +666,8 @@ mrvl_get_qoscfg(const char *key __rte_unused, const char *path,
 		} else {
 			if ((*cfg)->port[n].use_global_defaults == 0) {
 				MRVL_LOG(ERR,
-					 "Default Traffic Class required in custom configuration!");
+					 "Default Traffic Class required in "
+					 "custom configuration!");
 				return -1;
 			}
 		}

drivers/net/mvpp2/mrvl_qos.h

@@ -20,6 +20,7 @@
 /* QoS config. */
 struct mrvl_qos_cfg {
 	struct port_cfg {
+		enum pp2_ppio_eth_start_hdr eth_start_hdr;
 		int rate_limit_enable;
 		struct pp2_ppio_rate_limit_params rate_limit_params;
 		struct {