[PATCH 3/6] vp_vdpa: add vq irq offloading support

From: Wu Zongyong
Date: Wed Sep 08 2021 - 08:21:56 EST


This patch implements the get_vq_irq() callback for virtio pci devices
to allow irq offloading.

Signed-off-by: Wu Zongyong <wuzongyong@xxxxxxxxxxxxxxxxx>
---
drivers/vdpa/virtio_pci/vp_vdpa.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c
index fe0527329857..4c512ae1fe01 100644
--- a/drivers/vdpa/virtio_pci/vp_vdpa.c
+++ b/drivers/vdpa/virtio_pci/vp_vdpa.c
@@ -76,6 +76,13 @@ static u8 vp_vdpa_get_status(struct vdpa_device *vdpa)
return vp_modern_get_status(mdev);
}

+static int vp_vdpa_get_vq_irq(struct vdpa_device *vdev, u16 idx)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdev);
+
+ return vp_vdpa->vring[idx].irq;
+}
+
static void vp_vdpa_free_irq(struct vp_vdpa *vp_vdpa)
{
struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
@@ -416,6 +423,7 @@ static const struct vdpa_config_ops vp_vdpa_ops = {
.get_config = vp_vdpa_get_config,
.set_config = vp_vdpa_set_config,
.set_config_cb = vp_vdpa_set_config_cb,
+ .get_vq_irq = vp_vdpa_get_vq_irq,
};

static void vp_vdpa_free_irq_vectors(void *data)
--
2.31.1