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Date: Tue, 14 Mar 2023 13:27:44 +0800
From: Jason Wang <jasowang@...hat.com>
To: Stefano Garzarella <sgarzare@...hat.com>
Cc: virtualization@...ts.linux-foundation.org,
Andrey Zhadchenko <andrey.zhadchenko@...tuozzo.com>,
eperezma@...hat.com, netdev@...r.kernel.org, stefanha@...hat.com,
linux-kernel@...r.kernel.org,
"Michael S. Tsirkin" <mst@...hat.com>, kvm@...r.kernel.org
Subject: Re: [PATCH v2 5/8] vdpa_sim: make devices agnostic for work management
On Thu, Mar 2, 2023 at 7:35 PM Stefano Garzarella <sgarzare@...hat.com> wrote:
>
> 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@...hat.com>
Acked-by: Jason Wang <jasowang@...hat.com>
Thanks
> ---
> 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/vdpa_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/vdpa_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 = container_of(work, struct vdpasim, work);
> +
> + 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_attr *dev_attr,
>
> vdpasim = vdpa_to_sim(vdpa);
> vdpasim->dev_attr = *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_attr *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 *vdpasim,
> return handled;
> }
>
> -static void vdpasim_blk_work(struct work_struct *work)
> +static void vdpasim_blk_work(struct vdpasim *vdpasim)
> {
> - struct vdpasim *vdpasim = container_of(work, struct vdpasim, work);
> bool reschedule = 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 *vdpasim)
> 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 = container_of(work, struct vdpasim, work);
> struct vdpasim_virtqueue *txq = &vdpasim->vqs[1];
> struct vdpasim_virtqueue *rxq = &vdpasim->vqs[0];
> struct vdpasim_net *net = 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
>
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