From: Jason Wang <jasowang@redhat.com>
To: Stefano Garzarella <sgarzare@redhat.com>,
virtualization@lists.linux-foundation.org
Cc: Stefan Hajnoczi <stefanha@redhat.com>,
linux-kernel@vger.kernel.org, Laurent Vivier <lvivier@redhat.com>,
Max Gurtovoy <mgurtovoy@nvidia.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Eli Cohen <elic@nvidia.com>
Subject: Re: [PATCH v2 13/17] vdpa_sim: set vringh notify callback
Date: Mon, 30 Nov 2020 11:27:51 +0800 [thread overview]
Message-ID: <5569e198-22be-514a-744a-1bef9a3b95ce@redhat.com> (raw)
In-Reply-To: <20201126144950.92850-14-sgarzare@redhat.com>
On 2020/11/26 下午10:49, Stefano Garzarella wrote:
> Instead of calling the vq callback directly, we can leverage the
> vringh_notify() function, adding vdpasim_vq_notify() and setting it
> in the vringh notify callback.
>
> Suggested-by: Jason Wang <jasowang@redhat.com>
> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
> ---
> drivers/vdpa/vdpa_sim/vdpa_sim.c | 21 +++++++++++++++++----
> 1 file changed, 17 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index 8b87ce0485b6..4327efd6d41e 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -120,6 +120,17 @@ static struct vdpasim *dev_to_sim(struct device *dev)
> return vdpa_to_sim(vdpa);
> }
>
> +static void vdpasim_vq_notify(struct vringh *vring)
> +{
> + struct vdpasim_virtqueue *vq =
> + container_of(vring, struct vdpasim_virtqueue, vring);
> +
> + if (!vq->cb)
> + return;
> +
> + vq->cb(vq->private);
> +}
> +
> static void vdpasim_queue_ready(struct vdpasim *vdpasim, unsigned int idx)
> {
> struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
> @@ -131,6 +142,8 @@ static void vdpasim_queue_ready(struct vdpasim *vdpasim, unsigned int idx)
> (uintptr_t)vq->driver_addr,
> (struct vring_used *)
> (uintptr_t)vq->device_addr);
> +
> + vq->vring.notify = vdpasim_vq_notify;
Do we need to clear notify during reset?
Other looks good.
> }
>
> static void vdpasim_vq_reset(struct vdpasim *vdpasim,
> @@ -220,10 +233,10 @@ static void vdpasim_net_work(struct work_struct *work)
> smp_wmb();
>
> local_bh_disable();
> - if (txq->cb)
> - txq->cb(txq->private);
> - if (rxq->cb)
> - rxq->cb(rxq->private);
> + if (vringh_need_notify_iotlb(&txq->vring) > 0)
> + vringh_notify(&txq->vring);
> + if (vringh_need_notify_iotlb(&rxq->vring) > 0)
> + vringh_notify(&rxq->vring);
> local_bh_enable();
>
> if (++pkts > 4) {
next prev parent reply other threads:[~2020-11-30 3:29 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-26 14:49 [PATCH v2 00/17] vdpa: generalize vdpa simulator Stefano Garzarella
2020-11-26 14:49 ` [PATCH v2 01/17] vdpa: remove unnecessary 'default n' in Kconfig entries Stefano Garzarella
2020-11-30 3:01 ` Jason Wang
2020-11-26 14:49 ` [PATCH v2 02/17] vdpa_sim: remove unnecessary headers inclusion Stefano Garzarella
2020-11-30 3:04 ` Jason Wang
2020-11-30 11:10 ` Stefano Garzarella
2020-11-26 14:49 ` [PATCH v2 03/17] vdpa_sim: remove hard-coded virtq count Stefano Garzarella
2020-11-30 3:05 ` Jason Wang
2020-11-26 14:49 ` [PATCH v2 04/17] vdpa_sim: remove the limit of IOTLB entries Stefano Garzarella
2020-11-30 3:07 ` Jason Wang
2020-11-30 11:24 ` Stefano Garzarella
2020-11-26 14:49 ` [PATCH v2 05/17] vdpa_sim: rename vdpasim_config_ops variables Stefano Garzarella
2020-11-30 3:07 ` Jason Wang
2020-11-26 14:49 ` [PATCH v2 06/17] vdpa_sim: add struct vdpasim_dev_attr for device attributes Stefano Garzarella
2020-11-30 3:09 ` Jason Wang
2020-11-26 14:49 ` [PATCH v2 07/17] vdpa_sim: add device id field in vdpasim_dev_attr Stefano Garzarella
2020-11-30 3:10 ` Jason Wang
2020-11-26 14:49 ` [PATCH v2 08/17] vdpa_sim: add supported_features " Stefano Garzarella
2020-11-30 3:14 ` Jason Wang
2020-11-26 14:49 ` [PATCH v2 09/17] vdpa_sim: add work_fn " Stefano Garzarella
2020-11-30 3:16 ` Jason Wang
2020-11-26 14:49 ` [PATCH v2 10/17] vdpa_sim: store parsed MAC address in a buffer Stefano Garzarella
2020-11-30 3:20 ` Jason Wang
2020-11-26 14:49 ` [PATCH v2 11/17] vdpa_sim: make 'config' generic and usable for any device type Stefano Garzarella
2020-11-26 14:49 ` [PATCH v2 12/17] vdpa_sim: add get_config callback in vdpasim_dev_attr Stefano Garzarella
2020-11-30 3:25 ` Jason Wang
2020-11-30 14:14 ` Stefano Garzarella
2020-12-01 3:44 ` Jason Wang
2020-12-01 10:52 ` Stefano Garzarella
2020-11-26 14:49 ` [PATCH v2 13/17] vdpa_sim: set vringh notify callback Stefano Garzarella
2020-11-30 3:27 ` Jason Wang [this message]
2020-11-30 14:16 ` Stefano Garzarella
2020-11-26 14:49 ` [PATCH v2 14/17] vdpa_sim: use kvmalloc to allocate vdpasim->buffer Stefano Garzarella
2020-11-26 14:49 ` [PATCH v2 15/17] vdpa_sim: make vdpasim->buffer size configurable Stefano Garzarella
2020-11-26 14:49 ` [PATCH v2 16/17] vdpa_sim: split vdpasim_virtqueue's iov field in out_iov and in_iov Stefano Garzarella
2020-11-30 3:29 ` Jason Wang
2020-11-26 14:49 ` [PATCH v2 17/17] vdpa: split vdpasim to core and net modules Stefano Garzarella
2020-11-30 3:31 ` Jason Wang
2020-11-30 14:17 ` Stefano Garzarella
2020-11-26 15:12 ` [PATCH v2 00/17] vdpa: generalize vdpa simulator Max Gurtovoy
2020-11-26 15:24 ` Stefano Garzarella
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