[v2,05/11] eventdev: improve function documentation for query fns

  General improvements to the doxygen docs for eventdev functions for
querying basic information:
* number of devices
* id for a particular device
* socket id of device
* capability information for a device

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 lib/eventdev/rte_eventdev.h | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)
  

On 2024-01-19 18:43, Bruce Richardson wrote:
> General improvements to the doxygen docs for eventdev functions for
> querying basic information:
> * number of devices
> * id for a particular device
> * socket id of device
> * capability information for a device
> 
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
>   lib/eventdev/rte_eventdev.h | 22 +++++++++++++---------
>   1 file changed, 13 insertions(+), 9 deletions(-)
> 
> diff --git a/lib/eventdev/rte_eventdev.h b/lib/eventdev/rte_eventdev.h
> index 872f241df2..c57c93a22e 100644
> --- a/lib/eventdev/rte_eventdev.h
> +++ b/lib/eventdev/rte_eventdev.h
> @@ -440,8 +440,7 @@ struct rte_event;
>    */
>   
>   /**
> - * Get the total number of event devices that have been successfully
> - * initialised.
> + * Get the total number of event devices available for application use.

Does "for application use" add information? If they aren't for 
application use, I would argue such are "unavailable".

"Get the total number of available event devices" or just "Get the total 
number of event devices".

>    *
>    * @return
>    *   The total number of usable event devices.
> @@ -456,8 +455,10 @@ rte_event_dev_count(void);
>    *   Event device name to select the event device identifier.
>    *
>    * @return
> - *   Returns event device identifier on success.
> - *   - <0: Failure to find named event device.
> + *   Event device identifier (dev_id >= 0) on success.
> + *   Negative error code on failure:
> + *   - -EINVAL - input name parameter is invalid
> + *   - -ENODEV - no event device found with that name

"."?

>    */
>   int
>   rte_event_dev_get_dev_id(const char *name);
> @@ -470,7 +471,8 @@ rte_event_dev_get_dev_id(const char *name);
>    * @return
>    *   The NUMA socket id to which the device is connected or
>    *   a default of zero if the socket could not be determined.
> - *   -(-EINVAL)  dev_id value is out of range.
> + *   -EINVAL on error, where the given dev_id value does not
> + *   correspond to any event device.
>    */
>   int
>   rte_event_dev_socket_id(uint8_t dev_id);
> @@ -539,18 +541,20 @@ struct rte_event_dev_info {
>   };
>   
>   /**
> - * Retrieve the contextual information of an event device.
> + * Retrieve details of an event device's capabilities and configuration limits.
>    *
>    * @param dev_id
>    *   The identifier of the device.
>    *
>    * @param[out] dev_info
>    *   A pointer to a structure of type *rte_event_dev_info* to be filled with the
> - *   contextual information of the device.
> + *   information about the device's capabilities.
>    *
>    * @return
> - *   - 0: Success, driver updates the contextual information of the event device
> - *   - <0: Error code returned by the driver info get function.
> + *   - 0: Success, information about the event device is present in dev_info.
> + *   - <0: Failure, error code returned by the function.
> + *     - -EINVAL - invalid input parameters, e.g. incorrect device id
> + *     - -ENOTSUP - device does not support returning capabilities information
>    */
>   int
>   rte_event_dev_info_get(uint8_t dev_id, struct rte_event_dev_info *dev_info);