printf: Remove unused 'bprintf'

[drm/drm-misc.git] / include / linux / vdpa.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_VDPA_H
#define _LINUX_VDPA_H

#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/vhost_iotlb.h>
#include <linux/virtio_net.h>
#include <linux/virtio_blk.h>
#include <linux/if_ether.h>

/**
 * struct vdpa_callback - vDPA callback definition.
 * @callback: interrupt callback function
 * @private: the data passed to the callback function
 * @trigger: the eventfd for the callback (Optional).
 *           When it is set, the vDPA driver must guarantee that
 *           signaling it is functional equivalent to triggering
 *           the callback. Then vDPA parent can signal it directly
 *           instead of triggering the callback.
 */
struct vdpa_callback {
        irqreturn_t (*callback)(void *data);
        void *private;
        struct eventfd_ctx *trigger;
};

/**
 * struct vdpa_notification_area - vDPA notification area
 * @addr: base address of the notification area
 * @size: size of the notification area
 */
struct vdpa_notification_area {
        resource_size_t addr;
        resource_size_t size;
};

/**
 * struct vdpa_vq_state_split - vDPA split virtqueue state
 * @avail_index: available index
 */
struct vdpa_vq_state_split {
        u16     avail_index;
};

/**
 * struct vdpa_vq_state_packed - vDPA packed virtqueue state
 * @last_avail_counter: last driver ring wrap counter observed by device
 * @last_avail_idx: device available index
 * @last_used_counter: device ring wrap counter
 * @last_used_idx: used index
 */
struct vdpa_vq_state_packed {
        u16     last_avail_counter:1;
        u16     last_avail_idx:15;
        u16     last_used_counter:1;
        u16     last_used_idx:15;
};

struct vdpa_vq_state {
        union {
                struct vdpa_vq_state_split split;
                struct vdpa_vq_state_packed packed;
        };
};

struct vdpa_mgmt_dev;

/**
 * struct vdpa_device - representation of a vDPA device
 * @dev: underlying device
 * @dma_dev: the actual device that is performing DMA
 * @driver_override: driver name to force a match; do not set directly,
 *                   because core frees it; use driver_set_override() to
 *                   set or clear it.
 * @config: the configuration ops for this device.
 * @cf_lock: Protects get and set access to configuration layout.
 * @index: device index
 * @features_valid: were features initialized? for legacy guests
 * @ngroups: the number of virtqueue groups
 * @nas: the number of address spaces
 * @use_va: indicate whether virtual address must be used by this device
 * @nvqs: maximum number of supported virtqueues
 * @mdev: management device pointer; caller must setup when registering device as part
 *        of dev_add() mgmtdev ops callback before invoking _vdpa_register_device().
 */
struct vdpa_device {
        struct device dev;
        struct device *dma_dev;
        const char *driver_override;
        const struct vdpa_config_ops *config;
        struct rw_semaphore cf_lock; /* Protects get/set config */
        unsigned int index;
        bool features_valid;
        bool use_va;
        u32 nvqs;
        struct vdpa_mgmt_dev *mdev;
        unsigned int ngroups;
        unsigned int nas;
};

/**
 * struct vdpa_iova_range - the IOVA range support by the device
 * @first: start of the IOVA range
 * @last: end of the IOVA range
 */
struct vdpa_iova_range {
        u64 first;
        u64 last;
};

struct vdpa_dev_set_config {
        u64 device_features;
        struct {
                u8 mac[ETH_ALEN];
                u16 mtu;
                u16 max_vq_pairs;
        } net;
        u64 mask;
};

/**
 * struct vdpa_map_file - file area for device memory mapping
 * @file: vma->vm_file for the mapping
 * @offset: mapping offset in the vm_file
 */
struct vdpa_map_file {
        struct file *file;
        u64 offset;
};

/**
 * struct vdpa_config_ops - operations for configuring a vDPA device.
 * Note: vDPA device drivers are required to implement all of the
 * operations unless it is mentioned to be optional in the following
 * list.
 *
 * @set_vq_address:             Set the address of virtqueue
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              @desc_area: address of desc area
 *                              @driver_area: address of driver area
 *                              @device_area: address of device area
 *                              Returns integer: success (0) or error (< 0)
 * @set_vq_num:                 Set the size of virtqueue
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              @num: the size of virtqueue
 * @kick_vq:                    Kick the virtqueue
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 * @kick_vq_with_data:          Kick the virtqueue and supply extra data
 *                              (only if VIRTIO_F_NOTIFICATION_DATA is negotiated)
 *                              @vdev: vdpa device
 *                              @data for split virtqueue:
 *                              16 bits vqn and 16 bits next available index.
 *                              @data for packed virtqueue:
 *                              16 bits vqn, 15 least significant bits of
 *                              next available index and 1 bit next_wrap.
 * @set_vq_cb:                  Set the interrupt callback function for
 *                              a virtqueue
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              @cb: virtio-vdev interrupt callback structure
 * @set_vq_ready:               Set ready status for a virtqueue
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              @ready: ready (true) not ready(false)
 * @get_vq_ready:               Get ready status for a virtqueue
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              Returns boolean: ready (true) or not (false)
 * @set_vq_state:               Set the state for a virtqueue
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              @state: pointer to set virtqueue state (last_avail_idx)
 *                              Returns integer: success (0) or error (< 0)
 * @get_vq_state:               Get the state for a virtqueue
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              @state: pointer to returned state (last_avail_idx)
 * @get_vendor_vq_stats:        Get the vendor statistics of a device.
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              @msg: socket buffer holding stats message
 *                              @extack: extack for reporting error messages
 *                              Returns integer: success (0) or error (< 0)
 * @get_vq_notification:        Get the notification area for a virtqueue (optional)
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              Returns the notification area
 * @get_vq_irq:                 Get the irq number of a virtqueue (optional,
 *                              but must implemented if require vq irq offloading)
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              Returns int: irq number of a virtqueue,
 *                              negative number if no irq assigned.
 * @get_vq_size:                Get the size of a specific virtqueue (optional)
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              Return u16: the size of the virtqueue
 * @get_vq_align:               Get the virtqueue align requirement
 *                              for the device
 *                              @vdev: vdpa device
 *                              Returns virtqueue algin requirement
 * @get_vq_group:               Get the group id for a specific
 *                              virtqueue (optional)
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              Returns u32: group id for this virtqueue
 * @get_vq_desc_group:          Get the group id for the descriptor table of
 *                              a specific virtqueue (optional)
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              Returns u32: group id for the descriptor table
 *                              portion of this virtqueue. Could be different
 *                              than the one from @get_vq_group, in which case
 *                              the access to the descriptor table can be
 *                              confined to a separate asid, isolating from
 *                              the virtqueue's buffer address access.
 * @get_device_features:        Get virtio features supported by the device
 *                              @vdev: vdpa device
 *                              Returns the virtio features support by the
 *                              device
 * @get_backend_features:       Get parent-specific backend features (optional)
 *                              Returns the vdpa features supported by the
 *                              device.
 * @set_driver_features:        Set virtio features supported by the driver
 *                              @vdev: vdpa device
 *                              @features: feature support by the driver
 *                              Returns integer: success (0) or error (< 0)
 * @get_driver_features:        Get the virtio driver features in action
 *                              @vdev: vdpa device
 *                              Returns the virtio features accepted
 * @set_config_cb:              Set the config interrupt callback
 *                              @vdev: vdpa device
 *                              @cb: virtio-vdev interrupt callback structure
 * @get_vq_num_max:             Get the max size of virtqueue
 *                              @vdev: vdpa device
 *                              Returns u16: max size of virtqueue
 * @get_vq_num_min:             Get the min size of virtqueue (optional)
 *                              @vdev: vdpa device
 *                              Returns u16: min size of virtqueue
 * @get_device_id:              Get virtio device id
 *                              @vdev: vdpa device
 *                              Returns u32: virtio device id
 * @get_vendor_id:              Get id for the vendor that provides this device
 *                              @vdev: vdpa device
 *                              Returns u32: virtio vendor id
 * @get_status:                 Get the device status
 *                              @vdev: vdpa device
 *                              Returns u8: virtio device status
 * @set_status:                 Set the device status
 *                              @vdev: vdpa device
 *                              @status: virtio device status
 * @reset:                      Reset device
 *                              @vdev: vdpa device
 *                              Returns integer: success (0) or error (< 0)
 * @compat_reset:               Reset device with compatibility quirks to
 *                              accommodate older userspace. Only needed by
 *                              parent driver which used to have bogus reset
 *                              behaviour, and has to maintain such behaviour
 *                              for compatibility with older userspace.
 *                              Historically compliant driver only has to
 *                              implement .reset, Historically non-compliant
 *                              driver should implement both.
 *                              @vdev: vdpa device
 *                              @flags: compatibility quirks for reset
 *                              Returns integer: success (0) or error (< 0)
 * @suspend:                    Suspend the device (optional)
 *                              @vdev: vdpa device
 *                              Returns integer: success (0) or error (< 0)
 * @resume:                     Resume the device (optional)
 *                              @vdev: vdpa device
 *                              Returns integer: success (0) or error (< 0)
 * @get_config_size:            Get the size of the configuration space includes
 *                              fields that are conditional on feature bits.
 *                              @vdev: vdpa device
 *                              Returns size_t: configuration size
 * @get_config:                 Read from device specific configuration space
 *                              @vdev: vdpa device
 *                              @offset: offset from the beginning of
 *                              configuration space
 *                              @buf: buffer used to read to
 *                              @len: the length to read from
 *                              configuration space
 * @set_config:                 Write to device specific configuration space
 *                              @vdev: vdpa device
 *                              @offset: offset from the beginning of
 *                              configuration space
 *                              @buf: buffer used to write from
 *                              @len: the length to write to
 *                              configuration space
 * @get_generation:             Get device config generation (optional)
 *                              @vdev: vdpa device
 *                              Returns u32: device generation
 * @get_iova_range:             Get supported iova range (optional)
 *                              @vdev: vdpa device
 *                              Returns the iova range supported by
 *                              the device.
 * @set_vq_affinity:            Set the affinity of virtqueue (optional)
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              @cpu_mask: the affinity mask
 *                              Returns integer: success (0) or error (< 0)
 * @get_vq_affinity:            Get the affinity of virtqueue (optional)
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              Returns the affinity mask
 * @set_group_asid:             Set address space identifier for a
 *                              virtqueue group (optional)
 *                              @vdev: vdpa device
 *                              @group: virtqueue group
 *                              @asid: address space id for this group
 *                              Returns integer: success (0) or error (< 0)
 * @set_map:                    Set device memory mapping (optional)
 *                              Needed for device that using device
 *                              specific DMA translation (on-chip IOMMU)
 *                              @vdev: vdpa device
 *                              @asid: address space identifier
 *                              @iotlb: vhost memory mapping to be
 *                              used by the vDPA
 *                              Returns integer: success (0) or error (< 0)
 * @dma_map:                    Map an area of PA to IOVA (optional)
 *                              Needed for device that using device
 *                              specific DMA translation (on-chip IOMMU)
 *                              and preferring incremental map.
 *                              @vdev: vdpa device
 *                              @asid: address space identifier
 *                              @iova: iova to be mapped
 *                              @size: size of the area
 *                              @pa: physical address for the map
 *                              @perm: device access permission (VHOST_MAP_XX)
 *                              Returns integer: success (0) or error (< 0)
 * @dma_unmap:                  Unmap an area of IOVA (optional but
 *                              must be implemented with dma_map)
 *                              Needed for device that using device
 *                              specific DMA translation (on-chip IOMMU)
 *                              and preferring incremental unmap.
 *                              @vdev: vdpa device
 *                              @asid: address space identifier
 *                              @iova: iova to be unmapped
 *                              @size: size of the area
 *                              Returns integer: success (0) or error (< 0)
 * @reset_map:                  Reset device memory mapping to the default
 *                              state (optional)
 *                              Needed for devices that are using device
 *                              specific DMA translation and prefer mapping
 *                              to be decoupled from the virtio life cycle,
 *                              i.e. device .reset op does not reset mapping
 *                              @vdev: vdpa device
 *                              @asid: address space identifier
 *                              Returns integer: success (0) or error (< 0)
 * @get_vq_dma_dev:             Get the dma device for a specific
 *                              virtqueue (optional)
 *                              @vdev: vdpa device
 *                              @idx: virtqueue index
 *                              Returns pointer to structure device or error (NULL)
 * @bind_mm:                    Bind the device to a specific address space
 *                              so the vDPA framework can use VA when this
 *                              callback is implemented. (optional)
 *                              @vdev: vdpa device
 *                              @mm: address space to bind
 * @unbind_mm:                  Unbind the device from the address space
 *                              bound using the bind_mm callback. (optional)
 *                              @vdev: vdpa device
 * @free:                       Free resources that belongs to vDPA (optional)
 *                              @vdev: vdpa device
 */
struct vdpa_config_ops {
        /* Virtqueue ops */
        int (*set_vq_address)(struct vdpa_device *vdev,
                              u16 idx, u64 desc_area, u64 driver_area,
                              u64 device_area);
        void (*set_vq_num)(struct vdpa_device *vdev, u16 idx, u32 num);
        void (*kick_vq)(struct vdpa_device *vdev, u16 idx);
        void (*kick_vq_with_data)(struct vdpa_device *vdev, u32 data);
        void (*set_vq_cb)(struct vdpa_device *vdev, u16 idx,
                          struct vdpa_callback *cb);
        void (*set_vq_ready)(struct vdpa_device *vdev, u16 idx, bool ready);
        bool (*get_vq_ready)(struct vdpa_device *vdev, u16 idx);
        int (*set_vq_state)(struct vdpa_device *vdev, u16 idx,
                            const struct vdpa_vq_state *state);
        int (*get_vq_state)(struct vdpa_device *vdev, u16 idx,
                            struct vdpa_vq_state *state);
        int (*get_vendor_vq_stats)(struct vdpa_device *vdev, u16 idx,
                                   struct sk_buff *msg,
                                   struct netlink_ext_ack *extack);
        struct vdpa_notification_area
        (*get_vq_notification)(struct vdpa_device *vdev, u16 idx);
        /* vq irq is not expected to be changed once DRIVER_OK is set */
        int (*get_vq_irq)(struct vdpa_device *vdev, u16 idx);
        u16 (*get_vq_size)(struct vdpa_device *vdev, u16 idx);

        /* Device ops */
        u32 (*get_vq_align)(struct vdpa_device *vdev);
        u32 (*get_vq_group)(struct vdpa_device *vdev, u16 idx);
        u32 (*get_vq_desc_group)(struct vdpa_device *vdev, u16 idx);
        u64 (*get_device_features)(struct vdpa_device *vdev);
        u64 (*get_backend_features)(const struct vdpa_device *vdev);
        int (*set_driver_features)(struct vdpa_device *vdev, u64 features);
        u64 (*get_driver_features)(struct vdpa_device *vdev);
        void (*set_config_cb)(struct vdpa_device *vdev,
                              struct vdpa_callback *cb);
        u16 (*get_vq_num_max)(struct vdpa_device *vdev);
        u16 (*get_vq_num_min)(struct vdpa_device *vdev);
        u32 (*get_device_id)(struct vdpa_device *vdev);
        u32 (*get_vendor_id)(struct vdpa_device *vdev);
        u8 (*get_status)(struct vdpa_device *vdev);
        void (*set_status)(struct vdpa_device *vdev, u8 status);
        int (*reset)(struct vdpa_device *vdev);
        int (*compat_reset)(struct vdpa_device *vdev, u32 flags);
#define VDPA_RESET_F_CLEAN_MAP 1
        int (*suspend)(struct vdpa_device *vdev);
        int (*resume)(struct vdpa_device *vdev);
        size_t (*get_config_size)(struct vdpa_device *vdev);
        void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
                           void *buf, unsigned int len);
        void (*set_config)(struct vdpa_device *vdev, unsigned int offset,
                           const void *buf, unsigned int len);
        u32 (*get_generation)(struct vdpa_device *vdev);
        struct vdpa_iova_range (*get_iova_range)(struct vdpa_device *vdev);
        int (*set_vq_affinity)(struct vdpa_device *vdev, u16 idx,
                               const struct cpumask *cpu_mask);
        const struct cpumask *(*get_vq_affinity)(struct vdpa_device *vdev,
                                                 u16 idx);

        /* DMA ops */
        int (*set_map)(struct vdpa_device *vdev, unsigned int asid,
                       struct vhost_iotlb *iotlb);
        int (*dma_map)(struct vdpa_device *vdev, unsigned int asid,
                       u64 iova, u64 size, u64 pa, u32 perm, void *opaque);
        int (*dma_unmap)(struct vdpa_device *vdev, unsigned int asid,
                         u64 iova, u64 size);
        int (*reset_map)(struct vdpa_device *vdev, unsigned int asid);
        int (*set_group_asid)(struct vdpa_device *vdev, unsigned int group,
                              unsigned int asid);
        struct device *(*get_vq_dma_dev)(struct vdpa_device *vdev, u16 idx);
        int (*bind_mm)(struct vdpa_device *vdev, struct mm_struct *mm);
        void (*unbind_mm)(struct vdpa_device *vdev);

        /* Free device resources */
        void (*free)(struct vdpa_device *vdev);
};

struct vdpa_device *__vdpa_alloc_device(struct device *parent,
                                        const struct vdpa_config_ops *config,
                                        unsigned int ngroups, unsigned int nas,
                                        size_t size, const char *name,
                                        bool use_va);

/**
 * vdpa_alloc_device - allocate and initilaize a vDPA device
 *
 * @dev_struct: the type of the parent structure
 * @member: the name of struct vdpa_device within the @dev_struct
 * @parent: the parent device
 * @config: the bus operations that is supported by this device
 * @ngroups: the number of virtqueue groups supported by this device
 * @nas: the number of address spaces
 * @name: name of the vdpa device
 * @use_va: indicate whether virtual address must be used by this device
 *
 * Return allocated data structure or ERR_PTR upon error
 */
#define vdpa_alloc_device(dev_struct, member, parent, config, ngroups, nas, \
                          name, use_va) \
                          container_of((__vdpa_alloc_device( \
                                       parent, config, ngroups, nas, \
                                       (sizeof(dev_struct) + \
                                       BUILD_BUG_ON_ZERO(offsetof( \
                                       dev_struct, member))), name, use_va)), \
                                       dev_struct, member)

int vdpa_register_device(struct vdpa_device *vdev, u32 nvqs);
void vdpa_unregister_device(struct vdpa_device *vdev);

int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs);
void _vdpa_unregister_device(struct vdpa_device *vdev);

/**
 * struct vdpa_driver - operations for a vDPA driver
 * @driver: underlying device driver
 * @probe: the function to call when a device is found.  Returns 0 or -errno.
 * @remove: the function to call when a device is removed.
 */
struct vdpa_driver {
        struct device_driver driver;
        int (*probe)(struct vdpa_device *vdev);
        void (*remove)(struct vdpa_device *vdev);
};

#define vdpa_register_driver(drv) \
        __vdpa_register_driver(drv, THIS_MODULE)
int __vdpa_register_driver(struct vdpa_driver *drv, struct module *owner);
void vdpa_unregister_driver(struct vdpa_driver *drv);

#define module_vdpa_driver(__vdpa_driver) \
        module_driver(__vdpa_driver, vdpa_register_driver,      \
                      vdpa_unregister_driver)

static inline struct vdpa_driver *drv_to_vdpa(struct device_driver *driver)
{
        return container_of(driver, struct vdpa_driver, driver);
}

static inline struct vdpa_device *dev_to_vdpa(struct device *_dev)
{
        return container_of(_dev, struct vdpa_device, dev);
}

static inline void *vdpa_get_drvdata(const struct vdpa_device *vdev)
{
        return dev_get_drvdata(&vdev->dev);
}

static inline void vdpa_set_drvdata(struct vdpa_device *vdev, void *data)
{
        dev_set_drvdata(&vdev->dev, data);
}

static inline struct device *vdpa_get_dma_dev(struct vdpa_device *vdev)
{
        return vdev->dma_dev;
}

static inline int vdpa_reset(struct vdpa_device *vdev, u32 flags)
{
        const struct vdpa_config_ops *ops = vdev->config;
        int ret;

        down_write(&vdev->cf_lock);
        vdev->features_valid = false;
        if (ops->compat_reset && flags)
                ret = ops->compat_reset(vdev, flags);
        else
                ret = ops->reset(vdev);
        up_write(&vdev->cf_lock);
        return ret;
}

static inline int vdpa_set_features_unlocked(struct vdpa_device *vdev, u64 features)
{
        const struct vdpa_config_ops *ops = vdev->config;
        int ret;

        vdev->features_valid = true;
        ret = ops->set_driver_features(vdev, features);

        return ret;
}

static inline int vdpa_set_features(struct vdpa_device *vdev, u64 features)
{
        int ret;

        down_write(&vdev->cf_lock);
        ret = vdpa_set_features_unlocked(vdev, features);
        up_write(&vdev->cf_lock);

        return ret;
}

void vdpa_get_config(struct vdpa_device *vdev, unsigned int offset,
                     void *buf, unsigned int len);
void vdpa_set_config(struct vdpa_device *dev, unsigned int offset,
                     const void *buf, unsigned int length);
void vdpa_set_status(struct vdpa_device *vdev, u8 status);

/**
 * struct vdpa_mgmtdev_ops - vdpa device ops
 * @dev_add: Add a vdpa device using alloc and register
 *           @mdev: parent device to use for device addition
 *           @name: name of the new vdpa device
 *           @config: config attributes to apply to the device under creation
 *           Driver need to add a new device using _vdpa_register_device()
 *           after fully initializing the vdpa device. Driver must return 0
 *           on success or appropriate error code.
 * @dev_del: Remove a vdpa device using unregister
 *           @mdev: parent device to use for device removal
 *           @dev: vdpa device to remove
 *           Driver need to remove the specified device by calling
 *           _vdpa_unregister_device().
 * @dev_set_attr: change a vdpa device's attr after it was create
 *           @mdev: parent device to use for device
 *           @dev: vdpa device structure
 *           @config:Attributes to be set for the device.
 *           The driver needs to check the mask of the structure and then set
 *           the related information to the vdpa device. The driver must return 0
 *           if set successfully.
 */
struct vdpa_mgmtdev_ops {
        int (*dev_add)(struct vdpa_mgmt_dev *mdev, const char *name,
                       const struct vdpa_dev_set_config *config);
        void (*dev_del)(struct vdpa_mgmt_dev *mdev, struct vdpa_device *dev);
        int (*dev_set_attr)(struct vdpa_mgmt_dev *mdev, struct vdpa_device *dev,
                            const struct vdpa_dev_set_config *config);
};

/**
 * struct vdpa_mgmt_dev - vdpa management device
 * @device: Management parent device
 * @ops: operations supported by management device
 * @id_table: Pointer to device id table of supported ids
 * @config_attr_mask: bit mask of attributes of type enum vdpa_attr that
 *                    management device support during dev_add callback
 * @list: list entry
 * @supported_features: features supported by device
 * @max_supported_vqs: maximum number of virtqueues supported by device
 */
struct vdpa_mgmt_dev {
        struct device *device;
        const struct vdpa_mgmtdev_ops *ops;
        struct virtio_device_id *id_table;
        u64 config_attr_mask;
        struct list_head list;
        u64 supported_features;
        u32 max_supported_vqs;
};

int vdpa_mgmtdev_register(struct vdpa_mgmt_dev *mdev);
void vdpa_mgmtdev_unregister(struct vdpa_mgmt_dev *mdev);

#endif /* _LINUX_VDPA_H */