vfio: Move container code into drivers/vfio/container.c

All the functions that dereference struct vfio_container are moved into
container.c.

Simple code motion, no functional change.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/8-v3-297af71838d2+b9-vfio_container_split_jgg@nvidia.comSigned-off-by: Alex Williamson <alex.williamson@redhat.com>

drivers/vfio/Makefile

@@ -5,6 +5,7 @@ obj-$(CONFIG_VFIO) += vfio.o
 
 vfio-y += vfio_main.o \
 	  iova_bitmap.o \
+	  container.o
 
 obj-$(CONFIG_VFIO_VIRQFD) += vfio_virqfd.o
 obj-$(CONFIG_VFIO_IOMMU_TYPE1) += vfio_iommu_type1.o

drivers/vfio/vfio.h

@@ -11,6 +11,8 @@
 #include <linux/module.h>
 
 struct iommu_group;
+struct vfio_device;
+struct vfio_container;
 
 enum vfio_group_type {
 	/*
@@ -36,6 +38,24 @@ enum vfio_group_type {
 	VFIO_NO_IOMMU,
 };
 
+struct vfio_group {
+	struct device 			dev;
+	struct cdev			cdev;
+	refcount_t			users;
+	unsigned int			container_users;
+	struct iommu_group		*iommu_group;
+	struct vfio_container		*container;
+	struct list_head		device_list;
+	struct mutex			device_lock;
+	struct list_head		vfio_next;
+	struct list_head		container_next;
+	enum vfio_group_type		type;
+	struct rw_semaphore		group_rwsem;
+	struct kvm			*kvm;
+	struct file			*opened_file;
+	struct blocking_notifier_head	notifier;
+};
+
 /* events for the backend driver notify callback */
 enum vfio_iommu_notify_type {
 	VFIO_IOMMU_CONTAINER_CLOSE = 0,
@@ -75,7 +95,33 @@ struct vfio_iommu_driver_ops {
 				  enum vfio_iommu_notify_type event);
 };
 
+struct vfio_iommu_driver {
+	const struct vfio_iommu_driver_ops	*ops;
+	struct list_head			vfio_next;
+};
+
 int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops);
 void vfio_unregister_iommu_driver(const struct vfio_iommu_driver_ops *ops);
 
+bool vfio_assert_device_open(struct vfio_device *device);
+
+struct vfio_container *vfio_container_from_file(struct file *filep);
+int vfio_device_assign_container(struct vfio_device *device);
+void vfio_device_unassign_container(struct vfio_device *device);
+int vfio_container_attach_group(struct vfio_container *container,
+				struct vfio_group *group);
+void vfio_group_detach_container(struct vfio_group *group);
+void vfio_device_container_register(struct vfio_device *device);
+void vfio_device_container_unregister(struct vfio_device *device);
+long vfio_container_ioctl_check_extension(struct vfio_container *container,
+					  unsigned long arg);
+int __init vfio_container_init(void);
+void vfio_container_cleanup(void);
+
+#ifdef CONFIG_VFIO_NOIOMMU
+extern bool vfio_noiommu __read_mostly;
+#else
+enum { vfio_noiommu = false };
+#endif
+
 #endif