[RFC 5/7] vdpa: Add new vdpa_config_ops

Cindy Lu
2023-09-23T17:07:21Z

Add new vdpa_config_ops to support iommufd

Signed-off-by: Cindy Lu <lulu@redhat.com>
---
include/linux/vdpa.h | 34 +++++++++++++++++++++++++++++++++-
1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 6d0f5e4e82c2..4ada5bd6f90e 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -5,6 +5,7 @@
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/interrupt.h>
+#include <linux/iommufd.h>
#include <linux/vhost_iotlb.h>
#include <linux/virtio_net.h>
#include <linux/if_ether.h>
@@ -91,6 +92,12 @@ struct vdpa_device {
struct vdpa_mgmt_dev *mdev;
unsigned int ngroups;
unsigned int nas;
+ struct iommufd_access *iommufd_access;
+ struct iommufd_device *iommufd_device;
+ struct iommufd_ctx *iommufd_ictx;
+ unsigned long *vq_bitmap;
+ atomic_t iommufd_users;
+ bool iommufd_attached;
};

/**
@@ -282,6 +289,15 @@ struct vdpa_map_file {
* @iova: iova to be unmapped
* @size: size of the area
* Returns integer: success (0) or error (< 0)
+ * @bind_iommufd: use vdpa_iommufd_physical_bind for an IOMMU
+ * backed device.
+ * otherwise use vdpa_iommufd_emulated_bind
+ * @unbind_iommufd: use vdpa_iommufd_physical_unbind for an IOMMU
+ * backed device.
+ * otherwise, use vdpa_iommufd_emulated_unbind
+ * @attach_ioas: use vdpa_iommufd_physical_attach_ioas for an
+ * IOMMU backed device.
+ * @detach_ioas: Opposite of attach_ioas
* @free: Free resources that belongs to vDPA (optional)
* @vdev: vdpa device
*/
@@ -341,6 +357,12 @@ struct vdpa_config_ops {
u64 iova, u64 size);
int (*set_group_asid)(struct vdpa_device *vdev, unsigned int group,
unsigned int asid);
+ /* IOMMUFD ops */
+ int (*bind_iommufd)(struct vdpa_device *vdev, struct iommufd_ctx *ictx,
+ u32 *out_device_id);
+ void (*unbind_iommufd)(struct vdpa_device *vdev);
+ int (*attach_ioas)(struct vdpa_device *vdev, u32 *pt_id);
+ int (*detach_ioas)(struct vdpa_device *vdev);

/* Free device resources */
void (*free)(struct vdpa_device *vdev);
@@ -510,4 +532,14 @@ struct vdpa_mgmt_dev {
int vdpa_mgmtdev_register(struct vdpa_mgmt_dev *mdev);
void vdpa_mgmtdev_unregister(struct vdpa_mgmt_dev *mdev);

-#endif /* _LINUX_VDPA_H */
+int vdpa_iommufd_physical_bind(struct vdpa_device *vdpa,
+ struct iommufd_ctx *ictx, u32 *out_device_id);
+void vdpa_iommufd_physical_unbind(struct vdpa_device *vdpa);
+int vdpa_iommufd_physical_attach_ioas(struct vdpa_device *vdpa, u32 *pt_id);
+int vdpa_iommufd_emulated_bind(struct vdpa_device *vdpa,
+ struct iommufd_ctx *ictx, u32 *out_device_id);
+void vdpa_iommufd_emulated_unbind(struct vdpa_device *vdpa);
+int vdpa_iommufd_emulated_attach_ioas(struct vdpa_device *vdpa, u32 *pt_id);
+int vdpa_iommufd_emulated_detach_ioas(struct vdpa_device *vdpa);
+
+#endif
--
2.34.3