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Message-ID: <c6e7a2b1-1c5f-42cb-8b2b-49118ea0aa0c@intel.com>
Date: Mon, 6 Nov 2023 16:52:25 +0800
From: Yi Liu <yi.l.liu@...el.com>
To: Cindy Lu <lulu@...hat.com>, <jasowang@...hat.com>, <mst@...hat.com>,
<jgg@...dia.com>, <linux-kernel@...r.kernel.org>,
<virtualization@...ts.linux-foundation.org>, <netdev@...r.kernel.org>
Subject: Re: [RFC v1 4/8] vdpa: Add new vdpa_config_ops to support iommufd
On 2023/11/4 01:16, Cindy Lu wrote:
> Add 4 new vdpa_config_ops function to support iommufd
>
> Signed-off-by: Cindy Lu <lulu@...hat.com>
> ---
> include/linux/vdpa.h | 38 +++++++++++++++++++++++++++++++++++++-
> 1 file changed, 37 insertions(+), 1 deletion(-)
>
> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> index 0e652026b776..233d80f9d910 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>
> @@ -97,6 +98,12 @@ 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;
> };
>
> /**
> @@ -332,6 +339,17 @@ struct vdpa_map_file {
> * @vdev: vdpa device
> * @free: Free resources that belongs to vDPA (optional)
> * @vdev: vdpa device
> + * @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
duplicated kdoc.
> */
> struct vdpa_config_ops {
> /* Virtqueue ops */
> @@ -402,6 +420,13 @@ struct vdpa_config_ops {
>
> /* Free device resources */
> void (*free)(struct vdpa_device *vdev);
> + /* 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);
> +
> };
>
> struct vdpa_device *__vdpa_alloc_device(struct device *parent,
> @@ -570,4 +595,15 @@ 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_physical_detach_ioas(struct vdpa_device *vdpa);
> +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
--
Regards,
Yi Liu
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