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