From: James Hershaw <james.hers...@corigine.com>

Add command to change the state of a controllable LED on an ethdev port
to on/off. This is for the purpose of identifying which physical port is
associated with an ethdev.

Usage:
  testpmd> set port <port-id> led <on/off>

Signed-off-by: James Hershaw <james.hers...@corigine.com>
Reviewed-by: Chaoyong He <chaoyong...@corigine.com>
---
 app/test-pmd/cmdline.c                      | 52 +++++++++++++++++++++
 app/test-pmd/config.c                       | 20 ++++++++
 app/test-pmd/testpmd.h                      |  1 +
 doc/guides/testpmd_app_ug/testpmd_funcs.rst |  7 +++
 4 files changed, 80 insertions(+)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index a227d3cdc5..a117a4c2fb 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -523,6 +523,10 @@ static void cmd_help_long_parsed(void *parsed_result,
                        " user is acknowledging and taking responsibility for"
                        " this risk.\n\n"
 
+                       "set port (port_id) led (on|off)\n"
+                       "    set a controllable LED associated with a certain"
+                       " port on or off.\n\n"
+
                        "set port (port_id) uta (mac_address|all) (on|off)\n"
                        "    Add/Remove a or all unicast hash filter(s)"
                        "from port X.\n\n"
@@ -7610,6 +7614,53 @@ static cmdline_parse_inst_t cmd_seteeprom = {
        },
 };
 
+/* *** SET THE LED FOR CERTAIN PORT TO ON/OFF *** */
+struct cmd_dev_led_result {
+       cmdline_fixed_string_t set;
+       cmdline_fixed_string_t port;
+       portid_t port_id;
+       cmdline_fixed_string_t led;
+       cmdline_fixed_string_t state;
+};
+
+static void
+cmd_set_dev_led_parsed(void *parsed_result,
+               __rte_unused struct cmdline *cl,
+               __rte_unused void *data)
+{
+       struct cmd_dev_led_result *res = parsed_result;
+
+       if (strcmp(res->state, "on") == 0)
+               set_dev_led(res->port_id, true);
+       else
+               set_dev_led(res->port_id, false);
+}
+
+static cmdline_parse_token_string_t cmd_dev_led_set =
+       TOKEN_STRING_INITIALIZER(struct cmd_dev_led_result, set, "set");
+static cmdline_parse_token_string_t cmd_dev_led_port =
+       TOKEN_STRING_INITIALIZER(struct cmd_dev_led_result, port, "port");
+static cmdline_parse_token_num_t cmd_dev_led_port_id =
+       TOKEN_NUM_INITIALIZER(struct cmd_dev_led_result, port_id, RTE_UINT16);
+static cmdline_parse_token_string_t cmd_dev_led =
+       TOKEN_STRING_INITIALIZER(struct cmd_dev_led_result, led, "led");
+static cmdline_parse_token_string_t cmd_dev_state =
+       TOKEN_STRING_INITIALIZER(struct cmd_dev_led_result, state, "on#off");
+
+static cmdline_parse_inst_t cmd_set_dev_led = {
+       .f = cmd_set_dev_led_parsed,
+       .data = NULL,
+       .help_str = "set port <port_id> led <on/off>",
+       .tokens = {
+               (void *)&cmd_dev_led_set,
+               (void *)&cmd_dev_led_port,
+               (void *)&cmd_dev_led_port_id,
+               (void *)&cmd_dev_led,
+               (void *)&cmd_dev_state,
+               NULL,
+       },
+};
+
 /* *** CONFIGURE QUEUE STATS COUNTER MAPPINGS *** */
 struct cmd_set_qmap_result {
        cmdline_fixed_string_t set;
@@ -13349,6 +13400,7 @@ static cmdline_parse_ctx_t builtin_ctx[] = {
        &cmd_stop,
        &cmd_mac_addr,
        &cmd_set_fwd_eth_peer,
+       &cmd_set_dev_led,
        &cmd_set_qmap,
        &cmd_set_xstats_hide_zero,
        &cmd_set_record_core_cycles,
diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 73549b2b57..5c4599e903 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -5358,6 +5358,26 @@ set_fwd_eth_peer(portid_t port_id, char *peer_addr)
        peer_eth_addrs[port_id] = new_peer_addr;
 }
 
+void
+set_dev_led(portid_t port_id, bool active)
+{
+       int ret;
+
+       if (!rte_eth_dev_is_valid_port(port_id)) {
+               fprintf(stderr, "Error: Invalid port number %u\n", port_id);
+               return;
+       }
+
+       if (active)
+               ret = rte_eth_led_on(port_id);
+       else
+               ret = rte_eth_led_off(port_id);
+
+       if (ret < 0)
+               fprintf(stderr, "Error: Unable to change LED state for port %u: 
%s\n",
+                       port_id, rte_strerror(-ret));
+}
+
 int
 set_fwd_lcores_list(unsigned int *lcorelist, unsigned int nb_lc)
 {
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 1292d1a0a7..aa1f0e9dd1 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -944,6 +944,7 @@ int init_fwd_streams(void);
 void update_fwd_ports(portid_t new_pid);
 
 void set_fwd_eth_peer(portid_t port_id, char *peer_addr);
+void set_dev_led(portid_t port_id, bool active);
 
 void port_mtu_set(portid_t port_id, uint16_t mtu);
 int port_action_handle_create(portid_t port_id, uint32_t id, bool 
indirect_list,
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst 
b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 5c33d610ea..4ea745e66c 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -1377,6 +1377,13 @@ to 0.
    behaviour from the NIC. By inserting "confirm" into the command, the user is
    acknowledging and taking responsibility for this risk.
 
+set port led
+~~~~~~~~~~~~
+
+Set a controllable LED associated with a certain port on or off::
+
+   testpmd> set port (port_id) led (on|off)
+
 set port-uta
 ~~~~~~~~~~~~
 
-- 
2.39.1

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