[PATCH v6 20/20] vfio: mdev: idxd: setup request interrupt

Dave Jiang
2021-05-22T00:22:47Z

Add request interrupt support for idxd-mdev driver to support requesting
release of device.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/vfio/mdev/idxd/mdev.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/vfio/mdev/idxd/mdev.c b/drivers/vfio/mdev/idxd/mdev.c
index 25d1ac67b0c9..6bf2ec43656c 100644
--- a/drivers/vfio/mdev/idxd/mdev.c
+++ b/drivers/vfio/mdev/idxd/mdev.c
@@ -52,6 +52,8 @@ static int idxd_vdcm_get_irq_count(struct vfio_device *vdev, int type)
{
if (type == VFIO_PCI_MSIX_IRQ_INDEX)
return VIDXD_MAX_MSIX_VECS;
+ else if (type == VFIO_PCI_REQ_IRQ_INDEX)
+ return 1;

return 0;
}
@@ -486,6 +488,12 @@ static int idxd_vdcm_set_irqs(struct vdcm_idxd *vidxd, uint32_t flags,
return mdev_set_msix_trigger(mdev, index, start, count, flags, data);
}
break;
+ case VFIO_PCI_REQ_IRQ_INDEX:
+ switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) {
+ case VFIO_IRQ_SET_ACTION_TRIGGER:
+ return vfio_mdev_set_req_trigger(mdev, index, start, count, flags, data);
+ }
+ break;
}

return -ENOTTY;
@@ -678,6 +686,7 @@ static long idxd_vdcm_ioctl(struct vfio_device *vdev, unsigned int cmd, unsigned

switch (info.index) {
case VFIO_PCI_MSIX_IRQ_INDEX:
+ case VFIO_PCI_REQ_IRQ_INDEX:
info.flags |= VFIO_IRQ_INFO_NORESIZE;
break;
default:
@@ -750,6 +759,7 @@ static const struct vfio_device_ops idxd_mdev_ops = {
.write = idxd_vdcm_write,
.mmap = idxd_vdcm_mmap,
.ioctl = idxd_vdcm_ioctl,
+ .request = vfio_mdev_request,
};

static ssize_t name_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf)