drivers/vfio/mdev/mdev_private.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Mediated device interal definitions
   4  *
   5  * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
   6  *     Author: Neo Jia <cjia@nvidia.com>
   7  *             Kirti Wankhede <kwankhede@nvidia.com>
   8  */
   9
  10 #ifndef MDEV_PRIVATE_H
  11 #define MDEV_PRIVATE_H
  12
  13 int  mdev_bus_register(void);
  14 void mdev_bus_unregister(void);
  15
  16 struct mdev_parent {
  17         struct device *dev;
  18         const struct mdev_parent_ops *ops;
  19         struct kref ref;
  20         struct list_head next;
  21         struct kset *mdev_types_kset;
  22         struct list_head type_list;
  23         /* Synchronize device creation/removal with parent unregistration */
  24         struct rw_semaphore unreg_sem;
  25 };
  26
  27 struct mdev_device {
  28         struct device dev;
  29         struct mdev_parent *parent;
  30         guid_t uuid;
  31         void *driver_data;
  32         struct list_head next;
  33         struct kobject *type_kobj;
  34         struct device *iommu_device;
  35         bool active;
  36 };
  37
  38 #define to_mdev_device(dev)     container_of(dev, struct mdev_device, dev)
  39 #define dev_is_mdev(d)          ((d)->bus == &mdev_bus_type)
  40
  41 struct mdev_type {
  42         struct kobject kobj;
  43         struct kobject *devices_kobj;
  44         struct mdev_parent *parent;
  45         struct list_head next;
  46         struct attribute_group *group;
  47 };
  48
  49 #define to_mdev_type_attr(_attr)        \
  50         container_of(_attr, struct mdev_type_attribute, attr)
  51 #define to_mdev_type(_kobj)             \
  52         container_of(_kobj, struct mdev_type, kobj)
  53
  54 int  parent_create_sysfs_files(struct mdev_parent *parent);
  55 void parent_remove_sysfs_files(struct mdev_parent *parent);
  56
  57 int  mdev_create_sysfs_files(struct device *dev, struct mdev_type *type);
  58 void mdev_remove_sysfs_files(struct device *dev, struct mdev_type *type);
  59
  60 int  mdev_device_create(struct kobject *kobj,
  61                         struct device *dev, const guid_t *uuid);
  62 int  mdev_device_remove(struct device *dev);
  63
  64 #endif /* MDEV_PRIVATE_H */