uapi/linux/vduse.h

1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
15  * This is used for future extension.
23  * struct vduse_dev_config - basic configuration of a VDUSE device
34  * Structure used by VDUSE_CREATE_DEV ioctl to create VDUSE device.
61  * struct vduse_iotlb_entry - entry of IOTLB to describe one IOVA region [start, last]
64  * @last: last of the IOVA region
67  * Structure used by VDUSE_IOTLB_GET_FD ioctl to find an overlapped IOVA region.
72 	__u64 last;  member
80  * Find the first IOVA region that overlaps with the range [start, last]
81  * and return the corresponding file descriptor. Return -EINVAL means the
82  * IOVA region doesn't exist. Caller should set start and last fields.
94  * struct vduse_config_data - data used to update configuration space
97  * @buffer: the buffer used to write from
99  * Structure used by VDUSE_DEV_SET_CONFIG ioctl to update device
112  * Inject a config interrupt. It's usually used to notify virtio driver
118  * struct vduse_vq_config - basic configuration of a virtqueue
123  * Structure used by VDUSE_VQ_SETUP ioctl to setup a virtqueue.
138  * struct vduse_vq_state_split - split virtqueue state
146  * struct vduse_vq_state_packed - packed virtqueue state
147  * @last_avail_counter: last driver ring wrap counter observed by device
150  * @last_used_idx: used index
160  * struct vduse_vq_info - information of a virtqueue
170  * Structure used by VDUSE_VQ_GET_INFO ioctl to get virtqueue's information.
189  * struct vduse_vq_eventfd - eventfd configuration for a virtqueue
191  * @fd: eventfd, -1 means de-assigning the eventfd
193  * Structure used by VDUSE_VQ_SETUP_KICKFD ioctl to setup kick eventfd.
197 #define VDUSE_EVENTFD_DEASSIGN -1
202  * Setup kick eventfd for specified virtqueue. The kick eventfd is used
208  * Inject an interrupt for specific virtqueue. It's used to notify virtio driver
209  * to consume the used vring.
214  * struct vduse_iova_umem - userspace memory configuration for one IOVA region
220  * Structure used by VDUSE_IOTLB_REG_UMEM and VDUSE_IOTLB_DEREG_UMEM
221  * ioctls to register/de-register userspace memory for IOVA regions
233 /* De-register the userspace memory. Caller should set iova and size field. */
237  * struct vduse_iova_info - information of one IOVA region
239  * @last: last of the IOVA region
243  * Structure used by VDUSE_IOTLB_GET_INFO ioctl to get information of
248 	__u64 last;  member
255  * Find the first IOVA region that overlaps with the range [start, last]
256  * and return some information on it. Caller should set start and last fields.
263  * enum vduse_req_type - request type
276  * struct vduse_vq_state - virtqueue state
290  * struct vduse_dev_status - device status
298  * struct vduse_iova_range - IOVA range [start, last]
300  * @last: last of the IOVA range
304 	__u64 last;  member
308  * struct vduse_dev_request - control request
317  * Structure used by read(2) on /dev/vduse/$NAME.
332  * struct vduse_dev_response - response to control request
339  * Structure used by write(2) on /dev/vduse/$NAME.