[PATCH v1] event/dlb2: add dequeue interrupt mode support

[Jerin Jacob]

On Sat, Jun 28, 2025 at 11:17 AM Pravin Pathak <pravin.pathak at intel.com> wrote:
>
> DLB2 port interrupt is implemented using DPDK interrupt
> framework. This allows eventdev dequeue API to sleep when
> the port queue is empty and gets wakeup when event arrives
> at the port. Port dequeue mode is configured using devargs
> argument port_dequeue_wait. Supported modes are polling and
> interrupt. Default mode is polling.
> This commit also adds code to handle device error interrupts
> and print alarm details.
>
> Signed-off-by: Pravin Pathak <pravin.pathak at intel.com>
> Signed-off-by: Tirthendu Sarkar <tirthendu.sarkar at intel.com>
> ---
>  doc/guides/eventdevs/dlb2.rst              |  20 +
>  drivers/event/dlb2/dlb2.c                  | 236 +++++-
>  drivers/event/dlb2/dlb2_iface.c            |   7 +
>  drivers/event/dlb2/dlb2_iface.h            |   8 +
>  drivers/event/dlb2/dlb2_priv.h             |  18 +
>  drivers/event/dlb2/dlb2_user.h             | 112 +++
>  drivers/event/dlb2/pf/base/dlb2_hw_types.h |  70 ++
>  drivers/event/dlb2/pf/base/dlb2_osdep.h    |  46 ++
>  drivers/event/dlb2/pf/base/dlb2_regs.h     | 149 +++-
>  drivers/event/dlb2/pf/base/dlb2_resource.c | 825 +++++++++++++++++++++
>  drivers/event/dlb2/pf/base/dlb2_resource.h |   6 +
>  drivers/event/dlb2/pf/dlb2_pf.c            | 223 ++++++
>  12 files changed, 1711 insertions(+), 9 deletions(-)
>
> diff --git a/doc/guides/eventdevs/dlb2.rst b/doc/guides/eventdevs/dlb2.rst
> index 8ec7168f20..a4ba857351 100644
> --- a/doc/guides/eventdevs/dlb2.rst
> +++ b/doc/guides/eventdevs/dlb2.rst
> @@ -477,6 +477,26 @@ Example command to use as meson option for credit handling:
>
>         meson configure -Dc_args='-DDLB_SW_CREDITS_CHECKS=0 -DDLB_HW_CREDITS_CHECKS=1'
>
> +Interrupt Mode Support
> +~~~~~~~~~~~~~~~~~~~~~~
> +DLB dequeue supports interrupt mode for the API rte_event_dequeue_burst().
> +The default port dequeue mode is polling. Dequeue wait mode can be configured
> +on per eventdev port basis using devargs argument 'port_dequeue_wait'. In
> +interrupt mode, if the port queue is empty, the application thread will block
> +on the interrupt until a new event arrives. It enters blocking mode only after
> +any specified timeout. During the timeout, it will poll the port queue for
> +events as usual. Interrupt mode uses the DPDK interrupt support framework.
> +
> +    .. code-block:: console
> +
> +       --allow ea:00.0,port_dequeue_wait=all:interrupt

Adding other eventdev PMD mainatainers.

Looks like it can be a generic feature. i.e set this option is dev_configure()
If there is no objection, Please send a new patch around that.