[PATCH v4 3/3] net/iavf: add Tx LLDP command

[Zhichao Zeng <zhichaox.zeng@intel.com>]

This patch adds an IAVF testpmd command "set tx lldp on|off" which
will register an mbuf dynfield IAVF_TX_LLDP_DYNFIELD to indicate
the need to send LLDP packet. Currently, it only supports turning on.

For avx512, need to close the Tx port first, then "set tx lldp on",
and reopen the port to select correct Tx path.

Signed-off-by: Zhichao Zeng <zhichaox.zeng@intel.com>
---
 doc/guides/rel_notes/release_24_03.rst |  3 +
 drivers/net/iavf/iavf_testpmd.c        | 84 ++++++++++++++++++++++++++
 drivers/net/iavf/meson.build           |  3 +
 drivers/net/iavf/version.map           |  3 +
 4 files changed, 93 insertions(+)
 create mode 100644 drivers/net/iavf/iavf_testpmd.c

diff --git a/doc/guides/rel_notes/release_24_03.rst b/doc/guides/rel_notes/release_24_03.rst
index 6f8ad27808..f94e18c33a 100644
--- a/doc/guides/rel_notes/release_24_03.rst
+++ b/doc/guides/rel_notes/release_24_03.rst
@@ -55,6 +55,9 @@ New Features
      Also, make sure to start the actual text at the margin.
      =======================================================
 
+* **Updated Intel iavf driver.**
+
+  * Added support for Tx LLDP packet on scalar and avx512.
 
 Removed Items
 -------------
diff --git a/drivers/net/iavf/iavf_testpmd.c b/drivers/net/iavf/iavf_testpmd.c
new file mode 100644
index 0000000000..9d4fbb43ed
--- /dev/null
+++ b/drivers/net/iavf/iavf_testpmd.c
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2016 Intel Corporation.
+ */
+
+#include <stdlib.h>
+
+#include <rte_pmd_iavf.h>
+
+#include <cmdline_parse_num.h>
+#include <cmdline_parse_string.h>
+
+#include "iavf.h"
+#include "testpmd.h"
+#include "iavf_rxtx.h"
+
+struct cmd_enable_tx_lldp_result {
+	cmdline_fixed_string_t set;
+	cmdline_fixed_string_t tx;
+	cmdline_fixed_string_t lldp;
+	cmdline_fixed_string_t what;
+};
+
+static cmdline_parse_token_string_t cmd_enable_tx_lldp_set =
+	TOKEN_STRING_INITIALIZER(struct cmd_enable_tx_lldp_result,
+		set, "set");
+static cmdline_parse_token_string_t cmd_enable_tx_lldp_tx =
+	TOKEN_STRING_INITIALIZER(struct cmd_enable_tx_lldp_result,
+		tx, "tx");
+static cmdline_parse_token_string_t cmd_enable_tx_lldp_lldp =
+	TOKEN_STRING_INITIALIZER(struct cmd_enable_tx_lldp_result,
+		lldp, "lldp");
+static cmdline_parse_token_string_t cmd_enable_tx_lldp_what =
+	TOKEN_STRING_INITIALIZER(struct cmd_enable_tx_lldp_result,
+		what, "on#off");
+
+static void
+cmd_enable_tx_lldp_parsed(void *parsed_result,
+	__rte_unused struct cmdline *cl, __rte_unused void *data)
+{
+	struct cmd_enable_tx_lldp_result *res = parsed_result;
+	const struct rte_mbuf_dynfield iavf_tx_lldp_dynfield = {
+		.name = IAVF_TX_LLDP_DYNFIELD,
+		.size = sizeof(uint8_t),
+		.align = __alignof__(uint8_t),
+		.flags = 0
+	};
+	int ret = 0;
+
+	if (strncmp(res->what, "on", 2) == 0) {
+		rte_pmd_iavf_tx_lldp_dynfield_offset =
+			rte_mbuf_dynfield_register(&iavf_tx_lldp_dynfield);
+		printf("rte_pmd_iavf_tx_lldp_dynfield_offset: %d",
+			rte_pmd_iavf_tx_lldp_dynfield_offset);
+		if (ret < 0)
+			fprintf(stderr,
+				"rte mbuf dynfield register failed, offset: %d",
+				rte_pmd_iavf_tx_lldp_dynfield_offset);
+	}
+}
+
+static cmdline_parse_inst_t cmd_enable_tx_lldp = {
+	.f = cmd_enable_tx_lldp_parsed,
+	.data = NULL,
+	.help_str = "set iavf tx lldp on|off",
+	.tokens = {
+		(void *)&cmd_enable_tx_lldp_set,
+		(void *)&cmd_enable_tx_lldp_tx,
+		(void *)&cmd_enable_tx_lldp_lldp,
+		(void *)&cmd_enable_tx_lldp_what,
+		NULL,
+	},
+};
+
+static struct testpmd_driver_commands iavf_cmds = {
+	.commands = {
+	{
+		&cmd_enable_tx_lldp,
+		"set tx lldp (on|off)\n"
+		"    Set iavf Tx lldp packet(currently only supported on)\n\n",
+	},
+	{ NULL, NULL },
+	},
+};
+TESTPMD_ADD_DRIVER_COMMANDS(iavf_cmds)
diff --git a/drivers/net/iavf/meson.build b/drivers/net/iavf/meson.build
index a6ce2725c3..83aebd5596 100644
--- a/drivers/net/iavf/meson.build
+++ b/drivers/net/iavf/meson.build
@@ -8,6 +8,9 @@ endif
 cflags += ['-Wno-strict-aliasing']
 
 includes += include_directories('../../common/iavf')
+
+testpmd_sources = files('iavf_testpmd.c')
+
 deps += ['common_iavf', 'security', 'cryptodev']
 
 sources = files(
diff --git a/drivers/net/iavf/version.map b/drivers/net/iavf/version.map
index 135a4ccd3d..51e94f32fe 100644
--- a/drivers/net/iavf/version.map
+++ b/drivers/net/iavf/version.map
@@ -16,4 +16,7 @@ EXPERIMENTAL {
 
 	# added in 21.11
 	rte_pmd_ifd_dynflag_proto_xtr_ipsec_crypto_said_mask;
+
+	# added in 24.03
+	rte_pmd_iavf_tx_lldp_dynfield_offset;
 };
-- 
2.34.1