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From:   Eugenio Perez Martin <eperezma@redhat.com>
Date:   Fri, 8 Jul 2022 13:28:27 +0200
Message-ID: <CAJaqyWcHoB6edp3Qq8Df75Si_6aBDN=qp9ggB2D5hsshCxOdjQ@mail.gmail.com>
Subject: Re: [PATCH v6 1/4] vdpa: Add suspend operation
To:     Stefano Garzarella <sgarzare@redhat.com>
Cc:     netdev <netdev@vger.kernel.org>, Jason Wang <jasowang@redhat.com>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        virtualization <virtualization@lists.linux-foundation.org>,
        kvm list <kvm@vger.kernel.org>,
        "Michael S. Tsirkin" <mst@redhat.com>,
        Parav Pandit <parav@nvidia.com>,
        Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        Cindy Lu <lulu@redhat.com>,
        "Kamde, Tanuj" <tanuj.kamde@amd.com>,
        Si-Wei Liu <si-wei.liu@oracle.com>,
        "Uminski, Piotr" <Piotr.Uminski@intel.com>,
        habetsm.xilinx@gmail.com, "Dawar, Gautam" <gautam.dawar@amd.com>,
        Pablo Cascon Katchadourian <pabloc@xilinx.com>,
        Zhu Lingshan <lingshan.zhu@intel.com>,
        Laurent Vivier <lvivier@redhat.com>,
        Longpeng <longpeng2@huawei.com>,
        Dinan Gunawardena <dinang@xilinx.com>,
        Martin Petrus Hubertus Habets <martinh@xilinx.com>,
        Martin Porter <martinpo@xilinx.com>,
        Eli Cohen <elic@nvidia.com>, ecree.xilinx@gmail.com,
        Wu Zongyong <wuzongyong@linux.alibaba.com>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        Harpreet Singh Anand <hanand@xilinx.com>,
        Xie Yongji <xieyongji@bytedance.com>,
        Zhang Min <zhang.min9@zte.com.cn>
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On Tue, Jun 28, 2022 at 3:40 PM Stefano Garzarella <sgarzare@redhat.com> wr=
ote:
>
> On Thu, Jun 23, 2022 at 06:07:35PM +0200, Eugenio P=C3=A9rez wrote:
> >This operation is optional: It it's not implemented, backend feature bit
> >will not be exposed.
> >
> >Signed-off-by: Eugenio P=C3=A9rez <eperezma@redhat.com>
> >---
> > include/linux/vdpa.h | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> >diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> >index 7b4a13d3bd91..d282f464d2f1 100644
> >--- a/include/linux/vdpa.h
> >+++ b/include/linux/vdpa.h
> >@@ -218,6 +218,9 @@ struct vdpa_map_file {
> >  * @reset:                    Reset device
> >  *                            @vdev: vdpa device
> >  *                            Returns integer: success (0) or error (< =
0)
> >+ * @suspend:                  Suspend or resume the device (optional)
>                                             ^
> IIUC we removed the resume operation (that should be done with reset),
> so should we update this documentation?
>

Totally, I forgot to update the doc. I'll send a new version with that.

Thanks!


> Thanks,
> Stefano
>
> >+ *                            @vdev: vdpa device
> >+ *                            Returns integer: success (0) or error (< =
0)
> >  * @get_config_size:          Get the size of the configuration space i=
ncludes
> >  *                            fields that are conditional on feature bi=
ts.
> >  *                            @vdev: vdpa device
> >@@ -319,6 +322,7 @@ struct vdpa_config_ops {
> >       u8 (*get_status)(struct vdpa_device *vdev);
> >       void (*set_status)(struct vdpa_device *vdev, u8 status);
> >       int (*reset)(struct vdpa_device *vdev);
> >+      int (*suspend)(struct vdpa_device *vdev);
> >       size_t (*get_config_size)(struct vdpa_device *vdev);
> >       void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
> >                          void *buf, unsigned int len);
> >--
> >2.31.1
> >
>