drivers/staging/usbip/stub.h

   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 #include <linux/kernel.h>
  21 #include <linux/list.h>
  22 #include <linux/spinlock.h>
  23 #include <linux/slab.h>
  24 #include <linux/string.h>
  25 #include <linux/module.h>
  26 #include <linux/net.h>
  27
  28 #define STUB_BUSID_OTHER 0
  29 #define STUB_BUSID_REMOV 1
  30 #define STUB_BUSID_ADDED 2
  31 #define STUB_BUSID_ALLOC 3
  32
  33 struct stub_device {
  34         struct usb_interface *interface;
  35         struct usb_device *udev;
  36         struct list_head list;
  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
  62         wait_queue_head_t tx_waitq;
  63 };
  64
  65 /* private data into urb->priv */
  66 struct stub_priv {
  67         unsigned long seqnum;
  68         struct list_head list;
  69         struct stub_device *sdev;
  70         struct urb *urb;
  71
  72         int unlinking;
  73 };
  74
  75 struct stub_unlink {
  76         unsigned long seqnum;
  77         struct list_head list;
  78         __u32 status;
  79 };
  80
  81 #define BUSID_SIZE 20
  82 struct bus_id_priv {
  83         char name[BUSID_SIZE];
  84         char status;
  85         int interf_count;
  86         struct stub_device *sdev;
  87         char shutdown_busid;
  88 };
  89
  90 extern struct kmem_cache *stub_priv_cache;
  91
  92
  93 /*-------------------------------------------------------------------------*/
  94 /* prototype declarations */
  95
  96 /* stub_tx.c */
  97 void stub_complete(struct urb *);
  98 void stub_tx_loop(struct usbip_task *);
  99
 100 /* stub_dev.c */
 101 extern struct usb_driver stub_driver;
 102
 103 /* stub_rx.c */
 104 void stub_rx_loop(struct usbip_task *);
 105 void stub_enqueue_ret_unlink(struct stub_device *, __u32, __u32);
 106
 107 /* stub_main.c */
 108 struct bus_id_priv *get_busid_priv(const char *busid);
 109 int del_match_busid(char *busid);
 110
 111 void stub_device_cleanup_urbs(struct stub_device *sdev);