On Mon, Oct 19, 2020 at 10:56:21PM +0800, Xie Yongji wrote:
> diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h
> new file mode 100644
> index 000000000000..855d2116b3a6
> --- /dev/null
> +++ b/include/uapi/linux/vduse.h
> @@ -0,0 +1,85 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef _UAPI_VDUSE_H_
> +#define _UAPI_VDUSE_H_
> +
> +#include <linux/types.h>
> +
> +#define VDUSE_CONFIG_DATA_LEN 8
> +
> +enum vduse_req_type {
> + VDUSE_SET_VQ_STATE,
> + VDUSE_SET_FEATURES,
> + VDUSE_GET_FEATURES,
> + VDUSE_SET_STATUS,
> + VDUSE_GET_STATUS,
> + VDUSE_SET_CONFIG,
> + VDUSE_GET_CONFIG,
> +};
> +
> +struct vduse_vq_state {
> + __u32 index;
> + __u32 num;
> + __u64 desc_addr;
> + __u64 driver_addr;
> + __u64 device_addr;
> + __u8 ready;
> +};
> +
> +struct vduse_dev_config_data {
> + __u32 offset;
> + __u32 len;
> + __u8 data[VDUSE_CONFIG_DATA_LEN];
> +};
> +
> +struct vduse_dev_request {
> + __u32 type;
> + __u32 unique;
> + __u32 flags;
> + __u32 size;
> + union {
> + struct vduse_vq_state vq_state;
> + struct vduse_dev_config_data config;
> + __u64 features;
> + __u8 status;
> + };
> +};
> +
> +struct vduse_dev_response {
> + __u32 unique;
> + __s32 result;
> + union {
> + struct vduse_dev_config_data config;
> + __u64 features;
> + __u8 status;
> + };
> +};
> +
> +/* ioctl */
> +
> +struct vduse_dev_config {
> + __u32 id;
> + __u32 vendor_id;
> + __u32 device_id;
> + __u64 iova_size;
> + __u16 vq_num;
> + __u16 vq_size_max;
> + __u32 vq_align;
> +};
> +
> +struct vduse_vq_eventfd {
> + __u32 index;
> + __u32 fd;
> +};
> +
> +#define VDUSE_BASE 'V'
> +
> +#define VDUSE_CREATE_DEV _IOW(VDUSE_BASE, 0x01, struct vduse_dev_config)
> +#define VDUSE_GET_DEV _IO(VDUSE_BASE, 0x02)
> +#define VDUSE_DESTROY_DEV _IO(VDUSE_BASE, 0x03)
> +
> +#define VDUSE_DEV_START _IO(VDUSE_BASE, 0x04)
> +#define VDUSE_DEV_STOP _IO(VDUSE_BASE, 0x05)
> +#define VDUSE_VQ_SETUP_KICKFD _IOW(VDUSE_BASE, 0x06, struct vduse_vq_eventfd)
> +#define VDUSE_VQ_SETUP_IRQFD _IOW(VDUSE_BASE, 0x07, struct vduse_vq_eventfd)
> +
> +#endif /* _UAPI_VDUSE_H_ */
Could we see some documentation about the user interface of this module please?
> --
> 2.25.1
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