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References: <20230302113421.174582-1-sgarzare@redhat.com> <20230302113421.174582-6-sgarzare@redhat.com>
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From:   Eugenio Perez Martin <eperezma@redhat.com>
Date:   Fri, 3 Mar 2023 15:40:22 +0100
Message-ID: <CAJaqyWd+_wEAtfUhVfgAPLvr_3dm5pQghpdFhys5Maniwkhv1g@mail.gmail.com>
Subject: Re: [PATCH v2 5/8] vdpa_sim: make devices agnostic for work management
To:     Stefano Garzarella <sgarzare@redhat.com>
Cc:     virtualization@lists.linux-foundation.org,
        Andrey Zhadchenko <andrey.zhadchenko@virtuozzo.com>,
        netdev@vger.kernel.org, stefanha@redhat.com,
        linux-kernel@vger.kernel.org, Jason Wang <jasowang@redhat.com>,
        "Michael S. Tsirkin" <mst@redhat.com>, kvm@vger.kernel.org
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On Thu, Mar 2, 2023 at 12:35 PM Stefano Garzarella <sgarzare@redhat.com> wr=
ote:
>
> Let's move work management inside the vdpa_sim core.
> This way we can easily change how we manage the works, without
> having to change the devices each time.
>
> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>

Acked-by: Eugenio P=C3=A9rez Martin <eperezma@redhat.com>

> ---
>  drivers/vdpa/vdpa_sim/vdpa_sim.h     |  3 ++-
>  drivers/vdpa/vdpa_sim/vdpa_sim.c     | 17 +++++++++++++++--
>  drivers/vdpa/vdpa_sim/vdpa_sim_blk.c |  6 ++----
>  drivers/vdpa/vdpa_sim/vdpa_sim_net.c |  6 ++----
>  4 files changed, 21 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.h b/drivers/vdpa/vdpa_sim/vdp=
a_sim.h
> index 144858636c10..acee20faaf6a 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.h
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.h
> @@ -45,7 +45,7 @@ struct vdpasim_dev_attr {
>         u32 ngroups;
>         u32 nas;
>
> -       work_func_t work_fn;
> +       void (*work_fn)(struct vdpasim *vdpasim);
>         void (*get_config)(struct vdpasim *vdpasim, void *config);
>         void (*set_config)(struct vdpasim *vdpasim, const void *config);
>         int (*get_stats)(struct vdpasim *vdpasim, u16 idx,
> @@ -78,6 +78,7 @@ struct vdpasim {
>
>  struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *attr,
>                                const struct vdpa_dev_set_config *config);
> +void vdpasim_schedule_work(struct vdpasim *vdpasim);
>
>  /* TODO: cross-endian support */
>  static inline bool vdpasim_is_little_endian(struct vdpasim *vdpasim)
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdp=
a_sim.c
> index 481eb156658b..a6ee830efc38 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -116,6 +116,13 @@ static void vdpasim_do_reset(struct vdpasim *vdpasim=
)
>  static const struct vdpa_config_ops vdpasim_config_ops;
>  static const struct vdpa_config_ops vdpasim_batch_config_ops;
>
> +static void vdpasim_work_fn(struct work_struct *work)
> +{
> +       struct vdpasim *vdpasim =3D container_of(work, struct vdpasim, wo=
rk);
> +
> +       vdpasim->dev_attr.work_fn(vdpasim);
> +}
> +
>  struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr,
>                                const struct vdpa_dev_set_config *config)
>  {
> @@ -152,7 +159,7 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_att=
r *dev_attr,
>
>         vdpasim =3D vdpa_to_sim(vdpa);
>         vdpasim->dev_attr =3D *dev_attr;
> -       INIT_WORK(&vdpasim->work, dev_attr->work_fn);
> +       INIT_WORK(&vdpasim->work, vdpasim_work_fn);
>         spin_lock_init(&vdpasim->lock);
>         spin_lock_init(&vdpasim->iommu_lock);
>
> @@ -203,6 +210,12 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_at=
tr *dev_attr,
>  }
>  EXPORT_SYMBOL_GPL(vdpasim_create);
>
> +void vdpasim_schedule_work(struct vdpasim *vdpasim)
> +{
> +       schedule_work(&vdpasim->work);
> +}
> +EXPORT_SYMBOL_GPL(vdpasim_schedule_work);
> +
>  static int vdpasim_set_vq_address(struct vdpa_device *vdpa, u16 idx,
>                                   u64 desc_area, u64 driver_area,
>                                   u64 device_area)
> @@ -237,7 +250,7 @@ static void vdpasim_kick_vq(struct vdpa_device *vdpa,=
 u16 idx)
>         }
>
>         if (vq->ready)
> -               schedule_work(&vdpasim->work);
> +               vdpasim_schedule_work(vdpasim);
>  }
>
>  static void vdpasim_set_vq_cb(struct vdpa_device *vdpa, u16 idx,
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim=
/vdpa_sim_blk.c
> index 5117959bed8a..eb4897c8541e 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
> @@ -11,7 +11,6 @@
>  #include <linux/module.h>
>  #include <linux/device.h>
>  #include <linux/kernel.h>
> -#include <linux/sched.h>
>  #include <linux/blkdev.h>
>  #include <linux/vringh.h>
>  #include <linux/vdpa.h>
> @@ -286,9 +285,8 @@ static bool vdpasim_blk_handle_req(struct vdpasim *vd=
pasim,
>         return handled;
>  }
>
> -static void vdpasim_blk_work(struct work_struct *work)
> +static void vdpasim_blk_work(struct vdpasim *vdpasim)
>  {
> -       struct vdpasim *vdpasim =3D container_of(work, struct vdpasim, wo=
rk);
>         bool reschedule =3D false;
>         int i;
>
> @@ -326,7 +324,7 @@ static void vdpasim_blk_work(struct work_struct *work=
)
>         spin_unlock(&vdpasim->lock);
>
>         if (reschedule)
> -               schedule_work(&vdpasim->work);
> +               vdpasim_schedule_work(vdpasim);
>  }
>
>  static void vdpasim_blk_get_config(struct vdpasim *vdpasim, void *config=
)
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim=
/vdpa_sim_net.c
> index 862f405362de..e61a9ecbfafe 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> @@ -11,7 +11,6 @@
>  #include <linux/module.h>
>  #include <linux/device.h>
>  #include <linux/kernel.h>
> -#include <linux/sched.h>
>  #include <linux/etherdevice.h>
>  #include <linux/vringh.h>
>  #include <linux/vdpa.h>
> @@ -192,9 +191,8 @@ static void vdpasim_handle_cvq(struct vdpasim *vdpasi=
m)
>         u64_stats_update_end(&net->cq_stats.syncp);
>  }
>
> -static void vdpasim_net_work(struct work_struct *work)
> +static void vdpasim_net_work(struct vdpasim *vdpasim)
>  {
> -       struct vdpasim *vdpasim =3D container_of(work, struct vdpasim, wo=
rk);
>         struct vdpasim_virtqueue *txq =3D &vdpasim->vqs[1];
>         struct vdpasim_virtqueue *rxq =3D &vdpasim->vqs[0];
>         struct vdpasim_net *net =3D sim_to_net(vdpasim);
> @@ -260,7 +258,7 @@ static void vdpasim_net_work(struct work_struct *work=
)
>                 vdpasim_net_complete(rxq, write);
>
>                 if (tx_pkts > 4) {
> -                       schedule_work(&vdpasim->work);
> +                       vdpasim_schedule_work(vdpasim);
>                         goto out;
>                 }
>         }
> --
> 2.39.2
>