From 51b6e6c1c8e382c50fe88a04e25d326ceff74f89 Mon Sep 17 00:00:00 2001
From: Alvaro Karsz <alvaro.karsz@solid-run.com>
Date: Mon, 17 Apr 2023 11:38:53 +0300
Subject: vdpa/snet: implement kick_vq_with_data callback
Implement the kick_vq_with_data vDPA callback.
On kick, we pass the next available data to the DPU by writing it in
the kick offset.
Signed-off-by: Alvaro Karsz <alvaro.karsz@solid-run.com>
Message-Id: <20230417083853.375076-1-alvaro.karsz@solid-run.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
drivers/vdpa/solidrun/snet_main.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/vdpa/solidrun/snet_main.c b/drivers/vdpa/solidrun/snet_main.c
index 7359599e09e4..da14d437af33 100644
--- a/drivers/vdpa/solidrun/snet_main.c
+++ b/drivers/vdpa/solidrun/snet_main.c
@@ -112,6 +112,18 @@ static void snet_kick_vq(struct vdpa_device *vdev, u16 idx)
iowrite32(SNET_KICK_VAL, snet->vqs[idx]->kick_ptr);
}
+static void snet_kick_vq_with_data(struct vdpa_device *vdev, u32 data)
+{
+ struct snet *snet = vdpa_to_snet(vdev);
+ u16 idx = data & 0xFFFF;
+
+ /* not ready - ignore */
+ if (unlikely(!snet->vqs[idx]->ready))
+ return;
+
+ iowrite32((data & 0xFFFF0000) | SNET_KICK_VAL, snet->vqs[idx]->kick_ptr);
+}
+
static void snet_set_vq_cb(struct vdpa_device *vdev, u16 idx, struct vdpa_callback *cb)
{
struct snet *snet = vdpa_to_snet(vdev);
@@ -501,6 +513,7 @@ static const struct vdpa_config_ops snet_config_ops = {
.set_vq_address = snet_set_vq_address,
.set_vq_num = snet_set_vq_num,
.kick_vq = snet_kick_vq,
+ .kick_vq_with_data = snet_kick_vq_with_data,
.set_vq_cb = snet_set_vq_cb,
.set_vq_ready = snet_set_vq_ready,
.get_vq_ready = snet_get_vq_ready,
--
cgit