[PATCH 04/11] soc: fsl: dpio: add congestion notification support

Li Yang leoyang.li at nxp.com
Mon Sep 10 13:11:48 PDT 2018


On Mon, Sep 10, 2018 at 12:19 PM Horia Geantă <horia.geanta at nxp.com> wrote:
>
> Add support for Congestion State Change Notifications (CSCN), which
> allow DPIO users to be notified when a congestion group changes its
> state (due to hitting the entrance / exit threshold).
>
> Signed-off-by: Horia Geantă <horia.geanta at nxp.com>

Acked-by: Li Yang <leoyang.li at nxp.com>
> ---
>  include/soc/fsl/dpaa2-global.h | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
>
> diff --git a/include/soc/fsl/dpaa2-global.h b/include/soc/fsl/dpaa2-global.h
> index 9bc0713346a8..2bfc379d3dc9 100644
> --- a/include/soc/fsl/dpaa2-global.h
> +++ b/include/soc/fsl/dpaa2-global.h
> @@ -174,4 +174,19 @@ static inline const struct dpaa2_fd *dpaa2_dq_fd(const struct dpaa2_dq *dq)
>         return (const struct dpaa2_fd *)&dq->dq.fd[0];
>  }
>
> +#define DPAA2_CSCN_SIZE                sizeof(struct dpaa2_dq)
> +#define DPAA2_CSCN_ALIGN       16
> +#define DPAA2_CSCN_STATE_CG    BIT(0)
> +
> +/**
> + * dpaa2_cscn_state_congested() - Check congestion state
> + * @cscn: congestion SCN (delivered to WQ or memory)
> + *
> +i * Return true is congested.
> + */
> +static inline bool dpaa2_cscn_state_congested(struct dpaa2_dq *cscn)
> +{
> +       return !!(cscn->scn.state & DPAA2_CSCN_STATE_CG);
> +}
> +
>  #endif /* __FSL_DPAA2_GLOBAL_H */
> --
> 2.16.2
>



More information about the linux-arm-kernel mailing list