1/*
  2 * Copyright (C) 2003-2008 Takahiro Hirofuchi
  3 *
  4 * This is free software; you can redistribute it and/or modify
  5 * it under the terms of the GNU General Public License as published by
  6 * the Free Software Foundation; either version 2 of the License, or
  7 * (at your option) any later version.
  8 *
  9 * This is distributed in the hope that it will be useful,
 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12 * GNU General Public License for more details.
 13 *
 14 * You should have received a copy of the GNU General Public License
 15 * along with this program; if not, write to the Free Software
 16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
 17 * USA.
 18 */
 19
 20#ifndef __USBIP_STUB_H
 21#define __USBIP_STUB_H
 22
 23#include <linux/list.h>
 24#include <linux/slab.h>
 25#include <linux/spinlock.h>
 26#include <linux/types.h>
 27#include <linux/usb.h>
 28#include <linux/wait.h>
 29
 30#define STUB_BUSID_OTHER 0
 31#define STUB_BUSID_REMOV 1
 32#define STUB_BUSID_ADDED 2
 33#define STUB_BUSID_ALLOC 3
 34
 35struct stub_device {
 36	struct usb_device *udev;
 37
 38	struct usbip_device ud;
 39	__u32 devid;
 40
 41	/*
 42	 * stub_priv preserves private data of each urb.
 43	 * It is allocated as stub_priv_cache and assigned to urb->context.
 44	 *
 45	 * stub_priv is always linked to any one of 3 lists;
 46	 *	priv_init: linked to this until the comletion of a urb.
 47	 *	priv_tx  : linked to this after the completion of a urb.
 48	 *	priv_free: linked to this after the sending of the result.
 49	 *
 50	 * Any of these list operations should be locked by priv_lock.
 51	 */
 52	spinlock_t priv_lock;
 53	struct list_head priv_init;
 54	struct list_head priv_tx;
 55	struct list_head priv_free;
 56
 57	/* see comments for unlinking in stub_rx.c */
 58	struct list_head unlink_tx;
 59	struct list_head unlink_free;
 60
 61	wait_queue_head_t tx_waitq;
 62};
 63
 64/* private data into urb->priv */
 65struct stub_priv {
 66	unsigned long seqnum;
 67	struct list_head list;
 68	struct stub_device *sdev;
 69	struct urb *urb;
 70
 71	int unlinking;
 72};
 73
 74struct stub_unlink {
 75	unsigned long seqnum;
 76	struct list_head list;
 77	__u32 status;
 78};
 79
 80/* same as SYSFS_BUS_ID_SIZE */
 81#define BUSID_SIZE 32
 82
 83struct bus_id_priv {
 84	char name[BUSID_SIZE];
 85	char status;
 86	int interf_count;
 87	struct stub_device *sdev;
 88	struct usb_device *udev;
 89	char shutdown_busid;
 90};
 91
 92/* stub_priv is allocated from stub_priv_cache */
 93extern struct kmem_cache *stub_priv_cache;
 94
 95/* stub_dev.c */
 96extern struct usb_device_driver stub_driver;
 97
 98/* stub_main.c */
 99struct bus_id_priv *get_busid_priv(const char *busid);
100int del_match_busid(char *busid);
101void stub_device_cleanup_urbs(struct stub_device *sdev);
102
103/* stub_rx.c */
104int stub_rx_loop(void *data);
105
106/* stub_tx.c */
107void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum,
108			     __u32 status);
109void stub_complete(struct urb *urb);
110int stub_tx_loop(void *data);
111
112#endif /* __USBIP_STUB_H */