Re: [PATCH 1/4] ethdev: introduce ethdev HW desc dump PI

[Ray Kinsella <mdr@ashroe.eu>]

"Min Hu (Connor)" <humin29@huawei.com> writes:

> Added the ethdev HW Rx desc dump API which provides functions for query
> HW descriptor from device. HW descriptor info differs in different NICs.
> The information demonstrates I/O process which is important for debug.
> As the information is different between NICs, the new API is introduced.
>
> Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
> ---
>  doc/guides/rel_notes/release_22_07.rst |  6 ++++
>  lib/ethdev/ethdev_driver.h             | 42 ++++++++++++++++++++++++
>  lib/ethdev/rte_ethdev.c                | 44 ++++++++++++++++++++++++++
>  lib/ethdev/rte_ethdev.h                | 44 ++++++++++++++++++++++++++
>  lib/ethdev/version.map                 |  2 ++
>  5 files changed, 138 insertions(+)
>
> diff --git a/doc/guides/rel_notes/release_22_07.rst b/doc/guides/rel_notes/release_22_07.rst
> index 0ed4f92820..cfb9117dd3 100644
> --- a/doc/guides/rel_notes/release_22_07.rst
> +++ b/doc/guides/rel_notes/release_22_07.rst
> @@ -95,6 +95,12 @@ New Features
>    * Added AH mode support in lookaside protocol (IPsec) for CN9K & CN10K.
>    * Added AES-GMAC support in lookaside protocol (IPsec) for CN9K & CN10K.
>  
> +* **Added ethdev HW desc dump API, to dump Rx/Tx HW desc info from device.**
> +
> +  Added the ethdev HW Rx desc dump API which provides functions for query
> +  HW descriptor from device. HW descriptor info differs in different NICs.
> +  The information demonstrates I/O process which is important for debug.
> +  As the information is different between NICs, the new API is introduced.
>  
>  Removed Items
>  -------------
> diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
> index 69d9dc21d8..89512ab360 100644
> --- a/lib/ethdev/ethdev_driver.h
> +++ b/lib/ethdev/ethdev_driver.h
> @@ -1073,6 +1073,42 @@ typedef int (*eth_ip_reassembly_conf_set_t)(struct rte_eth_dev *dev,
>   */
>  typedef int (*eth_dev_priv_dump_t)(struct rte_eth_dev *dev, FILE *file);
>  
> +/**
> + * @internal
> + * Dump ethdev Rx descriptor info to a file.
> + *
> + * @param file
> + *   A pointer to a file for output.
> + * @param dev
> + *   Port (ethdev) handle.
> + * @param queue_id
> + *   The selected queue.
> + * @param desc_id
> + *   The selected descriptor.
> + * @return
> + *   Negative errno value on error, zero on success.
> + */
> +typedef int (*eth_rx_hw_desc_dump_t)(FILE *file, struct rte_eth_dev *dev,
> +				       uint16_t queue_id, uint16_t desc_id);
> +
> +/**
> + * @internal
> + * Dump ethdev Tx descriptor info to a file.
> + *
> + * @param file
> + *   A pointer to a file for output.
> + * @param dev
> + *   Port (ethdev) handle.
> + * @param queue_id
> + *   The selected queue.
> + * @param desc_id
> + *   The selected descriptor.
> + * @return
> + *   Negative errno value on error, zero on success.
> + */
> +typedef int (*eth_tx_hw_desc_dump_t)(FILE *file, struct rte_eth_dev *dev,
> +				       uint16_t queue_id, uint16_t desc_id);
> +
>  /**
>   * @internal A structure containing the functions exported by an Ethernet driver.
>   */
> @@ -1283,6 +1319,12 @@ struct eth_dev_ops {
>  
>  	/** Dump private info from device */
>  	eth_dev_priv_dump_t eth_dev_priv_dump;
> +
> +	/** Dump ethdev Rx descriptor info */
> +	eth_rx_hw_desc_dump_t eth_rx_hw_desc_dump;
> +
> +	/** Dump ethdev Tx descriptor info */
> +	eth_tx_hw_desc_dump_t eth_tx_hw_desc_dump;
>  };
>  
>  /**
> diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
> index a175867651..09abee6345 100644
> --- a/lib/ethdev/rte_ethdev.c
> +++ b/lib/ethdev/rte_ethdev.c
> @@ -5874,6 +5874,50 @@ rte_eth_dev_priv_dump(uint16_t port_id, FILE *file)
>  	return eth_err(port_id, (*dev->dev_ops->eth_dev_priv_dump)(dev, file));
>  }
>  
> +int
> +rte_eth_rx_hw_desc_dump(FILE *file, uint16_t port_id, uint16_t queue_id,
> +			uint16_t desc_id)
> +{
> +	struct rte_eth_dev *dev;
> +	int ret;
> +
> +	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
> +	dev = &rte_eth_devices[port_id];
> +
> +	if (queue_id >= dev->data->nb_rx_queues) {
> +		RTE_ETHDEV_LOG(ERR, "Invalid Rx queue_id=%u\n", queue_id);
> +		return -EINVAL;
> +	}
> +
> +	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->eth_rx_hw_desc_dump, -ENOTSUP);
> +	ret = (*dev->dev_ops->eth_rx_hw_desc_dump)(file, dev, queue_id,
> +						   desc_id);
> +
> +	return ret;
> +}
> +
> +int
> +rte_eth_tx_hw_desc_dump(FILE *file, uint16_t port_id, uint16_t queue_id,
> +			uint16_t desc_id)
> +{
> +	struct rte_eth_dev *dev;
> +	int ret;
> +
> +	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
> +	dev = &rte_eth_devices[port_id];
> +
> +	if (queue_id >= dev->data->nb_tx_queues) {
> +		RTE_ETHDEV_LOG(ERR, "Invalid Tx queue_id=%u\n", queue_id);
> +		return -EINVAL;
> +	}
> +
> +	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->eth_tx_hw_desc_dump, -ENOTSUP);
> +	ret = (*dev->dev_ops->eth_tx_hw_desc_dump)(file, dev, queue_id,
> +						   desc_id);
> +
> +	return ret;
> +}
> +
>  RTE_LOG_REGISTER_DEFAULT(rte_eth_dev_logtype, INFO);
>  
>  RTE_INIT(ethdev_init_telemetry)
> diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
> index 02df65d923..56ae630209 100644
> --- a/lib/ethdev/rte_ethdev.h
> +++ b/lib/ethdev/rte_ethdev.h
> @@ -5456,6 +5456,50 @@ typedef struct {
>  __rte_experimental
>  int rte_eth_dev_priv_dump(uint16_t port_id, FILE *file);
>  
> +/**
> + * @warning
> + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
> + *
> + * Dump ethdev Rx descriptor info to a file.
> + *
> + * @param file
> + *   A pointer to a file for output.
> + * @param dev
> + *   Port (ethdev) handle.
> + * @param queue_id
> + *   The selected queue.
> + * @param desc_id
> + *   The selected descriptor.
> + * @return
> + *   - On success, zero.
> + *   - On failure, a negative value.
> + */
> +__rte_experimental
> +int rte_eth_rx_hw_desc_dump(FILE *file, uint16_t port_id, uint16_t queue_id,
> +			    uint16_t desc_id);
> +
> +/**
> + * @warning
> + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
> + *
> + * Dump ethdev Tx descriptor info to a file.
> + *
> + * @param file
> + *   A pointer to a file for output.
> + * @param dev
> + *   Port (ethdev) handle.
> + * @param queue_id
> + *   The selected queue.
> + * @param desc_id
> + *   The selected descriptor.
> + * @return
> + *   - On success, zero.
> + *   - On failure, a negative value.
> + */
> +__rte_experimental
> +int rte_eth_tx_hw_desc_dump(FILE *file, uint16_t port_id, uint16_t queue_id,
> +			    uint16_t desc_id);
> +
>  #include <rte_ethdev_core.h>
>  
>  /**
> diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map
> index daca7851f2..109f4ea818 100644
> --- a/lib/ethdev/version.map
> +++ b/lib/ethdev/version.map
> @@ -285,6 +285,8 @@ EXPERIMENTAL {
>  	rte_mtr_color_in_protocol_priority_get;
>  	rte_mtr_color_in_protocol_set;
>  	rte_mtr_meter_vlan_table_update;

Please annotate with a comment indicating in which release the symbols
have been added. 

> +	rte_eth_rx_hw_desc_dump;
> +	rte_eth_tx_hw_desc_dump;
>  };
>  
>  INTERNAL {


-- 
Regards, Ray K