Re: [PATCH] vdpa/snet: implement the resume vDPA callback

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On Tue, May 2, 2023 at 9:11 PM Alvaro Karsz <alvaro.karsz@xxxxxxxxxxxxx> wrote:
>
> The callback sends a resume command to the DPU through
> the control mechanism.
>
> Signed-off-by: Alvaro Karsz <alvaro.karsz@xxxxxxxxxxxxx>

Acked-by: Jason Wang <jasowang@xxxxxxxxxx>

Thanks

> ---
>  drivers/vdpa/solidrun/snet_ctrl.c |  6 ++++++
>  drivers/vdpa/solidrun/snet_main.c | 15 +++++++++++++++
>  drivers/vdpa/solidrun/snet_vdpa.h |  1 +
>  3 files changed, 22 insertions(+)
>
> diff --git a/drivers/vdpa/solidrun/snet_ctrl.c b/drivers/vdpa/solidrun/snet_ctrl.c
> index 3858738643b..3cef2571d15 100644
> --- a/drivers/vdpa/solidrun/snet_ctrl.c
> +++ b/drivers/vdpa/solidrun/snet_ctrl.c
> @@ -16,6 +16,7 @@ enum snet_ctrl_opcodes {
>         SNET_CTRL_OP_DESTROY = 1,
>         SNET_CTRL_OP_READ_VQ_STATE,
>         SNET_CTRL_OP_SUSPEND,
> +       SNET_CTRL_OP_RESUME,
>  };
>
>  #define SNET_CTRL_TIMEOUT              2000000
> @@ -328,3 +329,8 @@ int snet_suspend_dev(struct snet *snet)
>  {
>         return snet_send_ctrl_msg(snet, SNET_CTRL_OP_SUSPEND, 0);
>  }
> +
> +int snet_resume_dev(struct snet *snet)
> +{
> +       return snet_send_ctrl_msg(snet, SNET_CTRL_OP_RESUME, 0);
> +}
> diff --git a/drivers/vdpa/solidrun/snet_main.c b/drivers/vdpa/solidrun/snet_main.c
> index cdcd84ce4f5..99428a04068 100644
> --- a/drivers/vdpa/solidrun/snet_main.c
> +++ b/drivers/vdpa/solidrun/snet_main.c
> @@ -509,6 +509,20 @@ static int snet_suspend(struct vdpa_device *vdev)
>         return ret;
>  }
>
> +static int snet_resume(struct vdpa_device *vdev)
> +{
> +       struct snet *snet = vdpa_to_snet(vdev);
> +       int ret;
> +
> +       ret = snet_resume_dev(snet);
> +       if (ret)
> +               SNET_ERR(snet->pdev, "SNET[%u] resume failed, err: %d\n", snet->sid, ret);
> +       else
> +               SNET_DBG(snet->pdev, "Resume SNET[%u] device\n", snet->sid);
> +
> +       return ret;
> +}
> +
>  static const struct vdpa_config_ops snet_config_ops = {
>         .set_vq_address         = snet_set_vq_address,
>         .set_vq_num             = snet_set_vq_num,
> @@ -536,6 +550,7 @@ static const struct vdpa_config_ops snet_config_ops = {
>         .get_config             = snet_get_config,
>         .set_config             = snet_set_config,
>         .suspend                = snet_suspend,
> +       .resume                 = snet_resume,
>  };
>
>  static int psnet_open_pf_bar(struct pci_dev *pdev, struct psnet *psnet)
> diff --git a/drivers/vdpa/solidrun/snet_vdpa.h b/drivers/vdpa/solidrun/snet_vdpa.h
> index 3c78d4e7d48..36ac285835e 100644
> --- a/drivers/vdpa/solidrun/snet_vdpa.h
> +++ b/drivers/vdpa/solidrun/snet_vdpa.h
> @@ -204,5 +204,6 @@ void snet_ctrl_clear(struct snet *snet);
>  int snet_destroy_dev(struct snet *snet);
>  int snet_read_vq_state(struct snet *snet, u16 idx, struct vdpa_vq_state *state);
>  int snet_suspend_dev(struct snet *snet);
> +int snet_resume_dev(struct snet *snet);
>
>  #endif //_SNET_VDPA_H_
> --
> 2.34.1
>

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