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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2003-2008 Takahiro Hirofuchi
*/
#ifndef __USBIP_STUB_H
#define __USBIP_STUB_H
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/usb.h>
#include <linux/wait.h>
#define STUB_BUSID_OTHER 0
#define STUB_BUSID_REMOV 1
#define STUB_BUSID_ADDED 2
#define STUB_BUSID_ALLOC 3
struct stub_device {
struct usb_device *udev;
struct usbip_device ud;
__u32 devid;
/*
* stub_priv preserves private data of each urb.
* It is allocated as stub_priv_cache and assigned to urb->context.
*
* stub_priv is always linked to any one of 3 lists;
* priv_init: linked to this until the comletion of a urb.
* priv_tx : linked to this after the completion of a urb.
* priv_free: linked to this after the sending of the result.
*
* Any of these list operations should be locked by priv_lock.
*/
spinlock_t priv_lock;
struct list_head priv_init;
struct list_head priv_tx;
struct list_head priv_free;
/* see comments for unlinking in stub_rx.c */
struct list_head unlink_tx;
struct list_head unlink_free;
wait_queue_head_t tx_waitq;
};
/* private data into urb->priv */
struct stub_priv {
unsigned long seqnum;
struct list_head list;
struct stub_device *sdev;
struct urb **urbs;
struct scatterlist *sgl;
int num_urbs;
int completed_urbs;
int urb_status;
int unlinking;
};
struct stub_unlink {
unsigned long seqnum;
struct list_head list;
__u32 status;
};
/* same as SYSFS_BUS_ID_SIZE */
#define BUSID_SIZE 32
struct bus_id_priv {
char name[BUSID_SIZE];
char status;
int interf_count;
struct stub_device *sdev;
struct usb_device *udev;
char shutdown_busid;
spinlock_t busid_lock;
};
/* stub_priv is allocated from stub_priv_cache */
extern struct kmem_cache *stub_priv_cache;
/* stub_dev.c */
extern struct usb_device_driver stub_driver;
/* stub_main.c */
struct bus_id_priv *get_busid_priv(const char *busid);
void put_busid_priv(struct bus_id_priv *bid);
int del_match_busid(char *busid);
void stub_free_priv_and_urb(struct stub_priv *priv);
void stub_device_cleanup_urbs(struct stub_device *sdev);
/* stub_rx.c */
int stub_rx_loop(void *data);
/* stub_tx.c */
void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum,
__u32 status);
void stub_complete(struct urb *urb);
int stub_tx_loop(void *data);
#endif /* __USBIP_STUB_H */
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