Re: [PATCH v4 1/5] eventdev: support to set queue attributes at runtime

[Jerin Jacob <jerinjacobk@gmail.com>]

On Mon, May 16, 2022 at 11:09 PM Shijith Thotton <sthotton@marvell.com> wrote:
>
> Added a new eventdev API rte_event_queue_attr_set(), to set event queue
> attributes at runtime from the values set during initialization using
> rte_event_queue_setup(). PMD's supporting this feature should expose the
> capability RTE_EVENT_DEV_CAP_RUNTIME_QUEUE_ATTR.
>
> Signed-off-by: Shijith Thotton <sthotton@marvell.com>
> Acked-by: Jerin Jacob <jerinj@marvell.com>

Hi @Mattias Rönnblom

Planning to merge this version for -rc1. Do you have any more comments
for this series?


> ---
>  doc/guides/eventdevs/features/default.ini |  1 +
>  doc/guides/rel_notes/release_22_07.rst    |  5 ++++
>  lib/eventdev/eventdev_pmd.h               | 22 ++++++++++++++++
>  lib/eventdev/rte_eventdev.c               | 26 ++++++++++++++++++
>  lib/eventdev/rte_eventdev.h               | 32 ++++++++++++++++++++++-
>  lib/eventdev/version.map                  |  3 +++
>  6 files changed, 88 insertions(+), 1 deletion(-)
>
> diff --git a/doc/guides/eventdevs/features/default.ini b/doc/guides/eventdevs/features/default.ini
> index 2ea233463a..00360f60c6 100644
> --- a/doc/guides/eventdevs/features/default.ini
> +++ b/doc/guides/eventdevs/features/default.ini
> @@ -17,6 +17,7 @@ runtime_port_link          =
>  multiple_queue_port        =
>  carry_flow_id              =
>  maintenance_free           =
> +runtime_queue_attr         =
>
>  ;
>  ; Features of a default Ethernet Rx adapter.
> diff --git a/doc/guides/rel_notes/release_22_07.rst b/doc/guides/rel_notes/release_22_07.rst
> index 88d6e96cc1..a7a912d665 100644
> --- a/doc/guides/rel_notes/release_22_07.rst
> +++ b/doc/guides/rel_notes/release_22_07.rst
> @@ -65,6 +65,11 @@ New Features
>    * Added support for promiscuous mode on Windows.
>    * Added support for MTU on Windows.
>
> +* **Added support for setting queue attributes at runtime in eventdev.**
> +
> +  Added new API ``rte_event_queue_attr_set()``, to set event queue attributes
> +  at runtime.
> +
>
>  Removed Items
>  -------------
> diff --git a/lib/eventdev/eventdev_pmd.h b/lib/eventdev/eventdev_pmd.h
> index ce469d47a6..3b85d9f7a5 100644
> --- a/lib/eventdev/eventdev_pmd.h
> +++ b/lib/eventdev/eventdev_pmd.h
> @@ -341,6 +341,26 @@ typedef int (*eventdev_queue_setup_t)(struct rte_eventdev *dev,
>  typedef void (*eventdev_queue_release_t)(struct rte_eventdev *dev,
>                 uint8_t queue_id);
>
> +/**
> + * Set an event queue attribute at runtime.
> + *
> + * @param dev
> + *   Event device pointer
> + * @param queue_id
> + *   Event queue index
> + * @param attr_id
> + *   Event queue attribute id
> + * @param attr_value
> + *   Event queue attribute value
> + *
> + * @return
> + *  - 0: Success.
> + *  - <0: Error code on failure.
> + */
> +typedef int (*eventdev_queue_attr_set_t)(struct rte_eventdev *dev,
> +                                        uint8_t queue_id, uint32_t attr_id,
> +                                        uint64_t attr_value);
> +
>  /**
>   * Retrieve the default event port configuration.
>   *
> @@ -1211,6 +1231,8 @@ struct eventdev_ops {
>         /**< Set up an event queue. */
>         eventdev_queue_release_t queue_release;
>         /**< Release an event queue. */
> +       eventdev_queue_attr_set_t queue_attr_set;
> +       /**< Set an event queue attribute. */
>
>         eventdev_port_default_conf_get_t port_def_conf;
>         /**< Get default port configuration. */
> diff --git a/lib/eventdev/rte_eventdev.c b/lib/eventdev/rte_eventdev.c
> index 532a253553..a31e99be02 100644
> --- a/lib/eventdev/rte_eventdev.c
> +++ b/lib/eventdev/rte_eventdev.c
> @@ -844,6 +844,32 @@ rte_event_queue_attr_get(uint8_t dev_id, uint8_t queue_id, uint32_t attr_id,
>         return 0;
>  }
>
> +int
> +rte_event_queue_attr_set(uint8_t dev_id, uint8_t queue_id, uint32_t attr_id,
> +                        uint64_t attr_value)
> +{
> +       struct rte_eventdev *dev;
> +
> +       RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
> +       dev = &rte_eventdevs[dev_id];
> +       if (!is_valid_queue(dev, queue_id)) {
> +               RTE_EDEV_LOG_ERR("Invalid queue_id=%" PRIu8, queue_id);
> +               return -EINVAL;
> +       }
> +
> +       if (!(dev->data->event_dev_cap &
> +             RTE_EVENT_DEV_CAP_RUNTIME_QUEUE_ATTR)) {
> +               RTE_EDEV_LOG_ERR(
> +                       "Device %" PRIu8 "does not support changing queue attributes at runtime",
> +                       dev_id);
> +               return -ENOTSUP;
> +       }
> +
> +       RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->queue_attr_set, -ENOTSUP);
> +       return (*dev->dev_ops->queue_attr_set)(dev, queue_id, attr_id,
> +                                              attr_value);
> +}
> +
>  int
>  rte_event_port_link(uint8_t dev_id, uint8_t port_id,
>                     const uint8_t queues[], const uint8_t priorities[],
> diff --git a/lib/eventdev/rte_eventdev.h b/lib/eventdev/rte_eventdev.h
> index 42a5660169..a79b1397eb 100644
> --- a/lib/eventdev/rte_eventdev.h
> +++ b/lib/eventdev/rte_eventdev.h
> @@ -225,7 +225,7 @@ struct rte_event;
>  /**< Event scheduling prioritization is based on the priority associated with
>   *  each event queue.
>   *
> - *  @see rte_event_queue_setup()
> + *  @see rte_event_queue_setup(), rte_event_queue_attr_set()
>   */
>  #define RTE_EVENT_DEV_CAP_EVENT_QOS           (1ULL << 1)
>  /**< Event scheduling prioritization is based on the priority associated with
> @@ -307,6 +307,13 @@ struct rte_event;
>   * global pool, or process signaling related to load balancing.
>   */
>
> +#define RTE_EVENT_DEV_CAP_RUNTIME_QUEUE_ATTR (1ULL << 11)
> +/**< Event device is capable of changing the queue attributes at runtime i.e
> + * after rte_event_queue_setup() or rte_event_start() call sequence. If this
> + * flag is not set, eventdev queue attributes can only be configured during
> + * rte_event_queue_setup().
> + */
> +
>  /* Event device priority levels */
>  #define RTE_EVENT_DEV_PRIORITY_HIGHEST   0
>  /**< Highest priority expressed across eventdev subsystem
> @@ -702,6 +709,29 @@ int
>  rte_event_queue_attr_get(uint8_t dev_id, uint8_t queue_id, uint32_t attr_id,
>                         uint32_t *attr_value);
>
> +/**
> + * Set an event queue attribute.
> + *
> + * @param dev_id
> + *   Eventdev id
> + * @param queue_id
> + *   Eventdev queue id
> + * @param attr_id
> + *   The attribute ID to set
> + * @param attr_value
> + *   The attribute value to set
> + *
> + * @return
> + *   - 0: Successfully set attribute.
> + *   - -EINVAL: invalid device, queue or attr_id.
> + *   - -ENOTSUP: device does not support setting the event attribute.
> + *   - <0: failed to set event queue attribute
> + */
> +__rte_experimental
> +int
> +rte_event_queue_attr_set(uint8_t dev_id, uint8_t queue_id, uint32_t attr_id,
> +                        uint64_t attr_value);
> +
>  /* Event port specific APIs */
>
>  /* Event port configuration bitmap flags */
> diff --git a/lib/eventdev/version.map b/lib/eventdev/version.map
> index cd5dada07f..c581b75c18 100644
> --- a/lib/eventdev/version.map
> +++ b/lib/eventdev/version.map
> @@ -108,6 +108,9 @@ EXPERIMENTAL {
>
>         # added in 22.03
>         rte_event_eth_rx_adapter_event_port_get;
> +
> +       # added in 22.07
> +       rte_event_queue_attr_set;
>  };
>
>  INTERNAL {
> --
> 2.25.1
>