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vp_vdpa: add vq irq offloading support 

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

Signed-off-by: Wu Zongyong <wuzongyong@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/bb091e5505db704dd620f8854a7aebc921d2a752.1635493219.git.wuzongyong@linux.alibaba.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Wu Zongyong 2021-10-29 17:14:44 +08:00 committed by Michael S. Tsirkin
parent d0ae1fbfcf
commit 5bbfea1eac
1 changed files with 12 additions and 0 deletions
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12
drivers/vdpa/virtio_pci/vp_vdpa.c
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@ -76,6 +76,17 @@ 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 *vdpa, u16 idx)
{
struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
int irq = vp_vdpa->vring[idx].irq;
if (irq == VIRTIO_MSI_NO_VECTOR)
return -EINVAL;
return irq;
}
static void vp_vdpa_free_irq(struct vp_vdpa *vp_vdpa)
{
struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
@ -427,6 +438,7 @@ 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)