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 35 struct 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 */ 65 struct stub_priv { 66 unsigned long seqnum; 67 struct list_head list; 68 struct stub_device *sdev; 69 struct urb **urbs; 70 struct scatterlist *sgl; 71 int num_urbs; 72 int completed_urbs; 73 int urb_status; 74 75 int unlinking; 76 }; 77 78 struct stub_unlink { 79 unsigned long seqnum; 80 struct list_head list; 81 __u32 status; 82 }; 83 84 /* same as SYSFS_BUS_ID_SIZE */ 85 #define BUSID_SIZE 32 86 87 struct bus_id_priv { 88 char name[BUSID_SIZE]; 89 char status; 90 int interf_count; 91 struct stub_device *sdev; 92 struct usb_device *udev; 93 char shutdown_busid; 94 spinlock_t busid_lock; 95 }; 96 97 /* stub_priv is allocated from stub_priv_cache */ 98 extern struct kmem_cache *stub_priv_cache; 99 100 /* stub_dev.c */ 101 extern struct usb_device_driver stub_driver; 102 103 /* stub_main.c */ 104 struct bus_id_priv *get_busid_priv(const char *busid); 105 void put_busid_priv(struct bus_id_priv *bid); 106 int del_match_busid(char *busid); 107 void stub_free_priv_and_urb(struct stub_priv *priv); 108 void stub_device_cleanup_urbs(struct stub_device *sdev); 109 110 /* stub_rx.c */ 111 int stub_rx_loop(void *data); 112 113 /* stub_tx.c */ 114 void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum, 115 __u32 status); 116 void stub_complete(struct urb *urb); 117 int stub_tx_loop(void *data); 118 119 #endif /* __USBIP_STUB_H */ 120