[PATCH 5/5] app/testpmd: allow to configure mtu

[David Marchand <david.marchand-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>]

From: Ivan Boule <ivan.boule-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>

Take avantage of the .set_mtu ethdev function and make it possible to configure
MTU on devices using testpmd.

Signed-off-by: Ivan Boule <ivan.boule-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
Signed-off-by: David Marchand <david.marchand-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
---
 app/test-pmd/cmdline.c |   54 ++++++++++++++++++++++++++++++++++++++++++++++++
 app/test-pmd/config.c  |   13 ++++++++++++
 app/test-pmd/testpmd.h |    2 +-
 3 files changed, 68 insertions(+), 1 deletion(-)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 68bcd7b..517944b 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -516,6 +516,8 @@ static void cmd_help_long_parsed(void *parsed_result,
 			"port config all (txfreet|txrst|rxfreet) (value)\n"
 			"    Set free threshold for rx/tx, or set"
 			" tx rs bit threshold.\n\n"
+			"port config mtu X value\n"
+			"    Set the MTU of port X to a given value\n\n"
 		);
 	}
 
@@ -1014,6 +1016,57 @@ cmdline_parse_inst_t cmd_config_max_pkt_len = {
 	},
 };
 
+/* *** configure port MTU *** */
+struct cmd_config_mtu_result {
+	cmdline_fixed_string_t port;
+	cmdline_fixed_string_t keyword;
+	cmdline_fixed_string_t mtu;
+	uint8_t port_id;
+	uint16_t value;
+};
+
+static void
+cmd_config_mtu_parsed(void *parsed_result,
+		      __attribute__((unused)) struct cmdline *cl,
+		      __attribute__((unused)) void *data)
+{
+	struct cmd_config_mtu_result *res = parsed_result;
+
+	if (res->value < ETHER_MIN_LEN) {
+		printf("mtu cannot be less than %d\n", ETHER_MIN_LEN);
+		return;
+	}
+	port_mtu_set(res->port_id, res->value);
+}
+
+cmdline_parse_token_string_t cmd_config_mtu_port =
+	TOKEN_STRING_INITIALIZER(struct cmd_config_mtu_result, port,
+				 "port");
+cmdline_parse_token_string_t cmd_config_mtu_keyword =
+	TOKEN_STRING_INITIALIZER(struct cmd_config_mtu_result, keyword,
+				 "config");
+cmdline_parse_token_string_t cmd_config_mtu_mtu =
+	TOKEN_STRING_INITIALIZER(struct cmd_config_mtu_result, keyword,
+				 "mtu");
+cmdline_parse_token_num_t cmd_config_mtu_port_id =
+	TOKEN_NUM_INITIALIZER(struct cmd_config_mtu_result, port_id, UINT8);
+cmdline_parse_token_num_t cmd_config_mtu_value =
+	TOKEN_NUM_INITIALIZER(struct cmd_config_mtu_result, value, UINT16);
+
+cmdline_parse_inst_t cmd_config_mtu = {
+	.f = cmd_config_mtu_parsed,
+	.data = NULL,
+	.help_str = "port config mtu value",
+	.tokens = {
+		(void *)&cmd_config_mtu_port,
+		(void *)&cmd_config_mtu_keyword,
+		(void *)&cmd_config_mtu_mtu,
+		(void *)&cmd_config_mtu_port_id,
+		(void *)&cmd_config_mtu_value,
+		NULL,
+	},
+};
+
 /* *** configure rx mode *** */
 struct cmd_config_rx_mode_flag {
 	cmdline_fixed_string_t port;
@@ -5366,6 +5419,7 @@ cmdline_parse_ctx_t main_ctx[] = {
 	(cmdline_parse_inst_t *)&cmd_config_speed_all,
 	(cmdline_parse_inst_t *)&cmd_config_speed_specific,
 	(cmdline_parse_inst_t *)&cmd_config_rx_tx,
+	(cmdline_parse_inst_t *)&cmd_config_mtu,
 	(cmdline_parse_inst_t *)&cmd_config_max_pkt_len,
 	(cmdline_parse_inst_t *)&cmd_config_rx_mode_flag,
 	(cmdline_parse_inst_t *)&cmd_config_rss,
diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index d3934e5..88a808c 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -503,6 +503,19 @@ port_reg_set(portid_t port_id, uint32_t reg_off, uint32_t reg_v)
 	display_port_reg_value(port_id, reg_off, reg_v);
 }
 
+void
+port_mtu_set(portid_t port_id, uint16_t mtu)
+{
+	int diag;
+
+	if (port_id_is_invalid(port_id))
+		return;
+	diag = rte_eth_dev_set_mtu(port_id, &mtu);
+	if (diag == 0)
+		return;
+	printf("Set MTU failed. diag=%d\n", diag);
+}
+
 /*
  * RX/TX ring descriptors display functions.
  */
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 0cf5a92..9b7dcbb 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -454,7 +454,7 @@ void fwd_config_setup(void);
 void set_def_fwd_config(void);
 int init_fwd_streams(void);
 
-
+void port_mtu_set(portid_t port_id, uint16_t mtu);
 void port_reg_bit_display(portid_t port_id, uint32_t reg_off, uint8_t bit_pos);
 void port_reg_bit_set(portid_t port_id, uint32_t reg_off, uint8_t bit_pos,
 		      uint8_t bit_v);
-- 
1.7.10.4