diff options
Diffstat (limited to 'include/linux/vfio.h')
| -rw-r--r-- | include/linux/vfio.h | 75 |
1 files changed, 69 insertions, 6 deletions
diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 93134b023968..454e9295970c 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -13,6 +13,7 @@ #include <linux/mm.h> #include <linux/workqueue.h> #include <linux/poll.h> +#include <linux/cdev.h> #include <uapi/linux/vfio.h> #include <linux/iova_bitmap.h> @@ -42,7 +43,11 @@ struct vfio_device { */ const struct vfio_migration_ops *mig_ops; const struct vfio_log_ops *log_ops; +#if IS_ENABLED(CONFIG_VFIO_GROUP) struct vfio_group *group; + struct list_head group_next; + struct list_head iommu_entry; +#endif struct vfio_device_set *dev_set; struct list_head dev_set_list; unsigned int migration_flags; @@ -51,29 +56,33 @@ struct vfio_device { /* Members below here are private, not for driver use */ unsigned int index; struct device device; /* device.kref covers object life circle */ +#if IS_ENABLED(CONFIG_VFIO_DEVICE_CDEV) + struct cdev cdev; +#endif refcount_t refcount; /* user count on registered device*/ unsigned int open_count; struct completion comp; - struct list_head group_next; - struct list_head iommu_entry; struct iommufd_access *iommufd_access; void (*put_kvm)(struct kvm *kvm); #if IS_ENABLED(CONFIG_IOMMUFD) struct iommufd_device *iommufd_device; - struct iommufd_ctx *iommufd_ictx; - bool iommufd_attached; + u8 iommufd_attached:1; #endif + u8 cdev_opened:1; }; /** * struct vfio_device_ops - VFIO bus driver device callbacks * + * @name: Name of the device driver. * @init: initialize private fields in device structure * @release: Reclaim private fields in device structure * @bind_iommufd: Called when binding the device to an iommufd * @unbind_iommufd: Opposite of bind_iommufd * @attach_ioas: Called when attaching device to an IOAS/HWPT managed by the - * bound iommufd. Undo in unbind_iommufd. + * bound iommufd. Undo in unbind_iommufd if @detach_ioas is not + * called. + * @detach_ioas: Opposite of attach_ioas * @open_device: Called when the first file descriptor is opened for this device * @close_device: Opposite of open_device * @read: Perform read(2) on device file descriptor @@ -97,6 +106,7 @@ struct vfio_device_ops { struct iommufd_ctx *ictx, u32 *out_device_id); void (*unbind_iommufd)(struct vfio_device *vdev); int (*attach_ioas)(struct vfio_device *vdev, u32 *pt_id); + void (*detach_ioas)(struct vfio_device *vdev); int (*open_device)(struct vfio_device *vdev); void (*close_device)(struct vfio_device *vdev); ssize_t (*read)(struct vfio_device *vdev, char __user *buf, @@ -114,15 +124,31 @@ struct vfio_device_ops { }; #if IS_ENABLED(CONFIG_IOMMUFD) +struct iommufd_ctx *vfio_iommufd_device_ictx(struct vfio_device *vdev); +int vfio_iommufd_get_dev_id(struct vfio_device *vdev, struct iommufd_ctx *ictx); int vfio_iommufd_physical_bind(struct vfio_device *vdev, struct iommufd_ctx *ictx, u32 *out_device_id); void vfio_iommufd_physical_unbind(struct vfio_device *vdev); int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id); +void vfio_iommufd_physical_detach_ioas(struct vfio_device *vdev); int vfio_iommufd_emulated_bind(struct vfio_device *vdev, struct iommufd_ctx *ictx, u32 *out_device_id); void vfio_iommufd_emulated_unbind(struct vfio_device *vdev); int vfio_iommufd_emulated_attach_ioas(struct vfio_device *vdev, u32 *pt_id); +void vfio_iommufd_emulated_detach_ioas(struct vfio_device *vdev); #else +static inline struct iommufd_ctx * +vfio_iommufd_device_ictx(struct vfio_device *vdev) +{ + return NULL; +} + +static inline int +vfio_iommufd_get_dev_id(struct vfio_device *vdev, struct iommufd_ctx *ictx) +{ + return VFIO_PCI_DEVID_NOT_OWNED; +} + #define vfio_iommufd_physical_bind \ ((int (*)(struct vfio_device *vdev, struct iommufd_ctx *ictx, \ u32 *out_device_id)) NULL) @@ -130,6 +156,8 @@ int vfio_iommufd_emulated_attach_ioas(struct vfio_device *vdev, u32 *pt_id); ((void (*)(struct vfio_device *vdev)) NULL) #define vfio_iommufd_physical_attach_ioas \ ((int (*)(struct vfio_device *vdev, u32 *pt_id)) NULL) +#define vfio_iommufd_physical_detach_ioas \ + ((void (*)(struct vfio_device *vdev)) NULL) #define vfio_iommufd_emulated_bind \ ((int (*)(struct vfio_device *vdev, struct iommufd_ctx *ictx, \ u32 *out_device_id)) NULL) @@ -137,9 +165,18 @@ int vfio_iommufd_emulated_attach_ioas(struct vfio_device *vdev, u32 *pt_id); ((void (*)(struct vfio_device *vdev)) NULL) #define vfio_iommufd_emulated_attach_ioas \ ((int (*)(struct vfio_device *vdev, u32 *pt_id)) NULL) +#define vfio_iommufd_emulated_detach_ioas \ + ((void (*)(struct vfio_device *vdev)) NULL) #endif +static inline bool vfio_device_cdev_opened(struct vfio_device *device) +{ + return device->cdev_opened; +} + /** + * struct vfio_migration_ops - VFIO bus device driver migration callbacks + * * @migration_set_state: Optional callback to change the migration state for * devices that support migration. It's mandatory for * VFIO_DEVICE_FEATURE_MIGRATION migration support. @@ -165,6 +202,8 @@ struct vfio_migration_ops { }; /** + * struct vfio_log_ops - VFIO bus device driver logging callbacks + * * @log_start: Optional callback to ask the device start DMA logging. * @log_stop: Optional callback to ask the device stop DMA logging. * @log_read_and_clear: Optional callback to ask the device read @@ -235,20 +274,44 @@ void vfio_unregister_group_dev(struct vfio_device *device); int vfio_assign_device_set(struct vfio_device *device, void *set_id); unsigned int vfio_device_set_open_count(struct vfio_device_set *dev_set); +struct vfio_device * +vfio_find_device_in_devset(struct vfio_device_set *dev_set, + struct device *dev); int vfio_mig_get_next_state(struct vfio_device *device, enum vfio_device_mig_state cur_fsm, enum vfio_device_mig_state new_fsm, enum vfio_device_mig_state *next_fsm); +void vfio_combine_iova_ranges(struct rb_root_cached *root, u32 cur_nodes, + u32 req_nodes); + /* * External user API */ +#if IS_ENABLED(CONFIG_VFIO_GROUP) struct iommu_group *vfio_file_iommu_group(struct file *file); bool vfio_file_is_group(struct file *file); +bool vfio_file_has_dev(struct file *file, struct vfio_device *device); +#else +static inline struct iommu_group *vfio_file_iommu_group(struct file *file) +{ + return NULL; +} + +static inline bool vfio_file_is_group(struct file *file) +{ + return false; +} + +static inline bool vfio_file_has_dev(struct file *file, struct vfio_device *device) +{ + return false; +} +#endif +bool vfio_file_is_valid(struct file *file); bool vfio_file_enforced_coherent(struct file *file); void vfio_file_set_kvm(struct file *file, struct kvm *kvm); -bool vfio_file_has_dev(struct file *file, struct vfio_device *device); #define VFIO_PIN_PAGES_MAX_ENTRIES (PAGE_SIZE/sizeof(unsigned long)) |