app/test-pmd: add support for tx and rx desc statu

  From: Kiran Kumar K <kirankumark@marvell.com>

Adding support to check TX and RX descriptor status.

Signed-off-by: Kiran Kumar K <kirankumark@marvell.com>
---
 app/test-pmd/cmdline.c                      | 111 ++++++++++++++++++++
 doc/guides/testpmd_app_ug/testpmd_funcs.rst |   8 ++
 2 files changed, 119 insertions(+)
  

On 9/3/2019 4:39 AM, kirankumark@marvell.com wrote:
> From: Kiran Kumar K <kirankumark@marvell.com>
> 
> Adding support to check TX and RX descriptor status.

+1 to the command

> 
> Signed-off-by: Kiran Kumar K <kirankumark@marvell.com>
> ---
>  app/test-pmd/cmdline.c                      | 111 ++++++++++++++++++++
>  doc/guides/testpmd_app_ug/testpmd_funcs.rst |   8 ++
>  2 files changed, 119 insertions(+)
> 
> diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
> index b6bc34b4d..c22d041c3 100644
> --- a/app/test-pmd/cmdline.c
> +++ b/app/test-pmd/cmdline.c
> @@ -18728,6 +18728,115 @@ cmdline_parse_inst_t cmd_show_tx_metadata = {
>  	},
>  };
>  
> +/* *** display rx/tx descriptor status *** */
> +struct cmd_show_rx_tx_desc_status_result {
> +	cmdline_fixed_string_t cmd_show;
> +	cmdline_fixed_string_t cmd_port;
> +	cmdline_fixed_string_t cmd_keyword;
> +	cmdline_fixed_string_t cmd_status;
> +	portid_t cmd_pid;
> +	portid_t cmd_qid;
> +	portid_t cmd_did;
> +};
> +
> +static void
> +cmd_show_rx_tx_desc_status_parsed(void *parsed_result,
> +		__attribute__((unused)) struct cmdline *cl,
> +		__attribute__((unused)) void *data)
> +{
> +	struct cmd_show_rx_tx_desc_status_result *res = parsed_result;
> +	int rc;
> +
> +	if (!rte_eth_dev_is_valid_port(res->cmd_pid)) {
> +		printf("invalid port id %u\n", res->cmd_pid);
> +		return;
> +	}
> +
> +	if (!strcmp(res->cmd_keyword, "rx")) {
> +		rc = rte_eth_rx_descriptor_status(res->cmd_pid, res->cmd_qid,
> +					     res->cmd_did);
> +		if (rc < 0) {
> +			printf("Invalid queueid = %d\n", res->cmd_qid);
> +			return;
> +		}
> +		if (rc == RTE_ETH_RX_DESC_AVAIL)
> +			printf("Desc status = AVAILABLE\n");
> +		else if (rc == RTE_ETH_RX_DESC_DONE)
> +			printf("Desc status = DONE\n");
> +		else
> +			printf("Desc status = UNAVAILABLE\n");
> +	} else if (!strcmp(res->cmd_keyword, "tx")) {
> +		rc = rte_eth_tx_descriptor_status(res->cmd_pid, res->cmd_qid,
> +					     res->cmd_did);
> +		if (rc < 0) {
> +			printf("Invalid queueid = %d\n", res->cmd_qid);
> +			return;
> +		}
> +		if (rc == RTE_ETH_TX_DESC_FULL)
> +			printf("Desc status = FULL\n");
> +		else if (rc == RTE_ETH_TX_DESC_DONE)
> +			printf("Desc status = DONE\n");
> +		else
> +			printf("Desc status = UNAVAILABLE\n");
> +	}
> +}
> +
> +cmdline_parse_token_string_t cmd_show_rx_tx_desc_status_show =
> +	TOKEN_STRING_INITIALIZER(struct cmd_show_rx_tx_desc_status_result,
> +			cmd_show, "show");
> +cmdline_parse_token_string_t cmd_show_rx_tx_desc_status_port =
> +	TOKEN_STRING_INITIALIZER(struct cmd_show_rx_tx_desc_status_result,
> +			cmd_port, "port");
> +cmdline_parse_token_num_t cmd_show_rx_tx_desc_status_pid =
> +	TOKEN_NUM_INITIALIZER(struct cmd_show_rx_tx_desc_status_result,
> +			cmd_pid, UINT16);
> +cmdline_parse_token_string_t cmd_show_rx_desc_status_keyword =
> +	TOKEN_STRING_INITIALIZER(struct cmd_show_rx_tx_desc_status_result,
> +			cmd_keyword, "rx");
> +cmdline_parse_token_string_t cmd_show_tx_desc_status_keyword =
> +	TOKEN_STRING_INITIALIZER(struct cmd_show_rx_tx_desc_status_result,
> +			cmd_keyword, "tx");
> +cmdline_parse_token_string_t cmd_show_rx_tx_desc_status_status =
> +	TOKEN_STRING_INITIALIZER(struct cmd_show_rx_tx_desc_status_result,
> +			cmd_status, "status");
> +cmdline_parse_token_num_t cmd_show_rx_tx_desc_status_qid =
> +	TOKEN_NUM_INITIALIZER(struct cmd_show_rx_tx_desc_status_result,
> +			cmd_qid, UINT16);
> +cmdline_parse_token_num_t cmd_show_rx_tx_desc_status_did =
> +	TOKEN_NUM_INITIALIZER(struct cmd_show_rx_tx_desc_status_result,
> +			cmd_did, UINT16);
> +cmdline_parse_inst_t cmd_show_rx_desc_status = {
> +	.f = cmd_show_rx_tx_desc_status_parsed,
> +	.data = NULL,
> +	.help_str = "show port <port_id> rx <queue_id> <desc_id> status",
> +	.tokens = {
> +		(void *)&cmd_show_rx_tx_desc_status_show,
> +		(void *)&cmd_show_rx_tx_desc_status_port,
> +		(void *)&cmd_show_rx_tx_desc_status_pid,
> +		(void *)&cmd_show_rx_desc_status_keyword,
> +		(void *)&cmd_show_rx_tx_desc_status_qid,
> +		(void *)&cmd_show_rx_tx_desc_status_did,
> +		(void *)&cmd_show_rx_tx_desc_status_status,
> +		NULL,
> +	},
> +};
> +
> +cmdline_parse_inst_t cmd_show_tx_desc_status = {
> +	.f = cmd_show_rx_tx_desc_status_parsed,
> +	.data = NULL,
> +	.help_str = "show port <port_id> tx <queue_id> <desc_id> status",

Please add new command to the help string, in 'cmd_help_long_parsed()'

> +	.tokens = {
> +		(void *)&cmd_show_rx_tx_desc_status_show,
> +		(void *)&cmd_show_rx_tx_desc_status_port,
> +		(void *)&cmd_show_rx_tx_desc_status_pid,
> +		(void *)&cmd_show_tx_desc_status_keyword,
> +		(void *)&cmd_show_rx_tx_desc_status_qid,
> +		(void *)&cmd_show_rx_tx_desc_status_did,
> +		(void *)&cmd_show_rx_tx_desc_status_status,
> +		NULL,
> +	},
> +};

Instead of creating two 'cmdline_parse_inst_t', you can use
'TOKEN_STRING_INITIALIZER' with '#' to add multiple value, like "rxq#txq", there
are multiple sample in testpmd.

> +
>  /* ******************************************************************************** */
>  
>  /* list of instructions */
> @@ -19016,6 +19125,8 @@ cmdline_parse_ctx_t main_ctx[] = {
>  #endif
>  	(cmdline_parse_inst_t *)&cmd_config_tx_metadata_specific,
>  	(cmdline_parse_inst_t *)&cmd_show_tx_metadata,
> +	(cmdline_parse_inst_t *)&cmd_show_rx_desc_status,
> +	(cmdline_parse_inst_t *)&cmd_show_tx_desc_status,
>  	(cmdline_parse_inst_t *)&cmd_set_raw,
>  	NULL,
>  };
> diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
> index 67f4339ca..a708c5ccf 100644
> --- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
> +++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
> @@ -254,6 +254,14 @@ Display information for a given port's RX/TX queue::
>  
>     testpmd> show (rxq|txq) info (port_id) (queue_id)
>  
> +show desc status(rxq|txq)
> +~~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +Display information for a given port's RX/TX descriptor status::
> +
> +   testpmd> show port (port_id) (rx|tx) (queue_id) (desc_id) status

Better to use 'rxq' or 'txq' for consistency.

and some variables has keyword before them, like "port 0",
some doesn't like <desc_id>, I think better to add a keyword for 'desc_id',
something like 'desc' perhaps.

> +
> +
>  show config
>  ~~~~~~~~~~~
>  
>