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 struct stub_device {
  29         struct usb_interface *interface;
  30         struct list_head list;
  31
  32         struct usbip_device ud;
  33         __u32 devid;
  34
  35         /*
  36          * stub_priv preserves private data of each urb.
  37          * It is allocated as stub_priv_cache and assigned to urb->context.
  38          *
  39          * stub_priv is always linked to any one of 3 lists;
  40          *      priv_init: linked to this until the comletion of a urb.
  41          *      priv_tx  : linked to this after the completion of a urb.
  42          *      priv_free: linked to this after the sending of the result.
  43          *
  44          * Any of these list operations should be locked by priv_lock.
  45          */
  46         spinlock_t priv_lock;
  47         struct list_head priv_init;
  48         struct list_head priv_tx;
  49         struct list_head priv_free;
  50
  51         /* see comments for unlinking in stub_rx.c */
  52         struct list_head unlink_tx;
  53         struct list_head unlink_free;
  54
  55
  56         wait_queue_head_t tx_waitq;
  57 };
  58
  59 /* private data into urb->priv */
  60 struct stub_priv {
  61         unsigned long seqnum;
  62         struct list_head list;
  63         struct stub_device *sdev;
  64         struct urb *urb;
  65
  66         int unlinking;
  67 };
  68
  69 struct stub_unlink {
  70         unsigned long seqnum;
  71         struct list_head list;
  72         __u32 status;
  73 };
  74
  75
  76 extern struct kmem_cache *stub_priv_cache;
  77
  78
  79 /*-------------------------------------------------------------------------*/
  80 /* prototype declarations */
  81
  82 /* stub_tx.c */
  83 void stub_complete(struct urb *);
  84 void stub_tx_loop(struct usbip_task *);
  85
  86 /* stub_dev.c */
  87 extern struct usb_driver stub_driver;
  88
  89 /* stub_rx.c */
  90 void stub_rx_loop(struct usbip_task *);
  91 void stub_enqueue_ret_unlink(struct stub_device *, __u32, __u32);
  92
  93 /* stub_main.c */
  94 int match_busid(const char *busid);
  95 void stub_device_cleanup_urbs(struct stub_device *sdev);