[dpdk-dev] [PATCH 1/2] app/testpmd: fix metadata API and Tx insertion

[Dekel Peled <dekelp@mellanox.com>]

Previous patch introduces the Tx metadata feature, with unnecessary
restrictions on data entry.
It also used the metadata in txonly fwd engine only.

This fix removes the data entry restrictions on metadata item.
It also implements callback function to add the metadata in every
Tx packet, sent by any fwd engine.

Fixes: 32eef22f0b79 ("app/testpmd: support metadata as flow rule item")
Cc: dekelp@mellanox.com

Signed-off-by: Dekel Peled <dekelp@mellanox.com>
---
 app/test-pmd/cmdline.c      |  5 +++++
 app/test-pmd/cmdline_flow.c |  7 +------
 app/test-pmd/testpmd.h      |  7 +++++++
 app/test-pmd/txonly.c       |  9 --------
 app/test-pmd/util.c         | 51 +++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 64 insertions(+), 15 deletions(-)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index fc74b95..27264eb 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -17718,6 +17718,11 @@ struct cmd_config_tx_metadata_specific_result {
 	if (port_id_is_invalid(res->port_id, ENABLED_WARN))
 		return;
 	ports[res->port_id].tx_metadata = rte_cpu_to_be_32(res->value);
+	/* Add/remove callback to insert valid metadata in every Tx packet. */
+	if (ports[res->port_id].tx_metadata)
+		add_tx_md_callback(res->port_id);
+	else
+		remove_tx_md_callback(res->port_id);
 }
 
 cmdline_parse_token_string_t cmd_config_tx_metadata_specific_port =
diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index 7932b54..dfb7c147 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -548,11 +548,6 @@ struct parse_action_priv {
 	ZERO,
 };
 
-static const enum index item_param_is[] = {
-	ITEM_PARAM_IS,
-	ZERO,
-};
-
 static const enum index next_item[] = {
 	ITEM_END,
 	ITEM_VOID,
@@ -2094,7 +2089,7 @@ static int comp_vc_action_rss_queue(struct context *, const struct token *,
 	[ITEM_META_DATA] = {
 		.name = "data",
 		.help = "metadata value",
-		.next = NEXT(item_meta, NEXT_ENTRY(UNSIGNED), item_param_is),
+		.next = NEXT(item_meta, NEXT_ENTRY(UNSIGNED), item_param),
 		.args = ARGS(ARGS_ENTRY_MASK_HTON(struct rte_flow_item_meta,
 						  data, "\xff\xff\xff\xff")),
 	},
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index c07548e..102f2f4 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -198,6 +198,7 @@ struct rte_port {
 #endif
 	/**< metadata value to insert in Tx packets. */
 	rte_be32_t		tx_metadata;
+	const struct rte_eth_rxtx_callback *tx_set_md_cb[MAX_QUEUE_ID+1];
 };
 
 /**
@@ -781,6 +782,12 @@ uint16_t dump_tx_pkts(uint16_t port_id, uint16_t queue, struct rte_mbuf *pkts[],
 void remove_tx_dump_callbacks(portid_t portid);
 void configure_rxtx_dump_callbacks(uint16_t verbose);
 
+uint16_t tx_pkt_set_md(uint16_t port_id, __rte_unused uint16_t queue,
+		       struct rte_mbuf *pkts[], uint16_t nb_pkts,
+		       __rte_unused void *user_param);
+void add_tx_md_callback(portid_t portid);
+void remove_tx_md_callback(portid_t portid);
+
 /*
  * Work-around of a compilation error with ICC on invocations of the
  * rte_be_to_cpu_16() function.
diff --git a/app/test-pmd/txonly.c b/app/test-pmd/txonly.c
index fae84ca..1f08b6e 100644
--- a/app/test-pmd/txonly.c
+++ b/app/test-pmd/txonly.c
@@ -253,15 +253,6 @@
 		pkt->l2_len = sizeof(struct ether_hdr);
 		pkt->l3_len = sizeof(struct ipv4_hdr);
 		pkts_burst[nb_pkt] = pkt;
-
-		/*
-		 * If user configured metadata value add it to packet
-		 * and set ol_flags accordingly
-		 */
-		if (ports[fs->tx_port].tx_metadata) {
-			pkt->tx_metadata = ports[fs->tx_port].tx_metadata;
-			pkt->ol_flags |= PKT_TX_METADATA;
-		}
 	}
 	nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
 	/*
diff --git a/app/test-pmd/util.c b/app/test-pmd/util.c
index f4125df..687bfa4 100644
--- a/app/test-pmd/util.c
+++ b/app/test-pmd/util.c
@@ -166,3 +166,54 @@
 	dump_pkt_burst(port_id, queue, pkts, nb_pkts, 0);
 	return nb_pkts;
 }
+
+uint16_t
+tx_pkt_set_md(uint16_t port_id, __rte_unused uint16_t queue,
+	      struct rte_mbuf *pkts[], uint16_t nb_pkts,
+	      __rte_unused void *user_param)
+{
+	uint16_t i = 0;
+
+	/*
+	 * Add metadata value to every Tx packet,
+	 * and set ol_flags accordingly.
+	 */
+	for (i = 0; i < nb_pkts; i++) {
+		pkts[i]->tx_metadata = ports[port_id].tx_metadata;
+		pkts[i]->ol_flags |= PKT_TX_METADATA;
+	}
+	return nb_pkts;
+}
+
+void
+add_tx_md_callback(portid_t portid)
+{
+	struct rte_eth_dev_info dev_info;
+	uint16_t queue;
+
+	if (port_id_is_invalid(portid, ENABLED_WARN))
+		return;
+	rte_eth_dev_info_get(portid, &dev_info);
+	for (queue = 0; queue < dev_info.nb_tx_queues; queue++)
+		if (!ports[portid].tx_set_md_cb[queue])
+			ports[portid].tx_set_md_cb[queue] =
+				rte_eth_add_tx_callback(portid, queue,
+							tx_pkt_set_md, NULL);
+}
+
+void
+remove_tx_md_callback(portid_t portid)
+{
+	struct rte_eth_dev_info dev_info;
+	uint16_t queue;
+
+	if (port_id_is_invalid(portid, ENABLED_WARN))
+		return;
+	rte_eth_dev_info_get(portid, &dev_info);
+	for (queue = 0; queue < dev_info.nb_tx_queues; queue++)
+		if (ports[portid].tx_set_md_cb[queue]) {
+			rte_eth_remove_tx_callback(portid, queue,
+				ports[portid].tx_set_md_cb[queue]);
+			ports[portid].tx_set_md_cb[queue] = NULL;
+		}
+}
-- 
1.8.3.1