2022-02-24 21:46:45

by Gautam Dawar

[permalink] [raw]
Subject: [RFC PATCH v2 17/19] vdpa_sim: factor out buffer completion logic

Wrap up common buffer completion logic in to vdpasim_net_complete

Signed-off-by: Jason Wang <[email protected]>
Signed-off-by: Gautam Dawar <[email protected]>
---
drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 33 +++++++++++++++-------------
1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
index ff22cc56f40b..05d552cb7f94 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
@@ -31,6 +31,22 @@

#define VDPASIM_NET_VQ_NUM 2

+static void vdpasim_net_complete(struct vdpasim_virtqueue *vq, size_t len)
+{
+ /* Make sure data is wrote before advancing index */
+ smp_wmb();
+
+ vringh_complete_iotlb(&vq->vring, vq->head, len);
+
+ /* Make sure used is visible before rasing the interrupt. */
+ smp_wmb();
+
+ local_bh_disable();
+ if (vringh_need_notify_iotlb(&vq->vring) > 0)
+ vringh_notify(&vq->vring);
+ local_bh_enable();
+}
+
static void vdpasim_net_work(struct work_struct *work)
{
struct vdpasim *vdpasim = container_of(work, struct vdpasim, work);
@@ -78,21 +94,8 @@ static void vdpasim_net_work(struct work_struct *work)
total_write += write;
}

- /* Make sure data is wrote before advancing index */
- smp_wmb();
-
- vringh_complete_iotlb(&txq->vring, txq->head, 0);
- vringh_complete_iotlb(&rxq->vring, rxq->head, total_write);
-
- /* Make sure used is visible before rasing the interrupt. */
- smp_wmb();
-
- local_bh_disable();
- 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();
+ vdpasim_net_complete(txq, 0);
+ vdpasim_net_complete(rxq, total_write);

if (++pkts > 4) {
schedule_work(&vdpasim->work);
--
2.25.0