1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2003-2008 Takahiro Hirofuchi 4 */ 5 6 #ifndef __USBIP_STUB_H 7 #define __USBIP_STUB_H 8 9 #include <linux/list.h> 10 #include <linux/slab.h> 11 #include <linux/spinlock.h> 12 #include <linux/types.h> 13 #include <linux/usb.h> 14 #include <linux/wait.h> 15 16 #define STUB_BUSID_OTHER 0 17 #define STUB_BUSID_REMOV 1 18 #define STUB_BUSID_ADDED 2 19 #define STUB_BUSID_ALLOC 3 20 21 struct stub_device { 22 struct usb_device *udev; 23 24 struct usbip_device ud; 25 __u32 devid; 26 27 /* 28 * stub_priv preserves private data of each urb. 29 * It is allocated as stub_priv_cache and assigned to urb->context. 30 * 31 * stub_priv is always linked to any one of 3 lists; 32 * priv_init: linked to this until the comletion of a urb. 33 * priv_tx : linked to this after the completion of a urb. 34 * priv_free: linked to this after the sending of the result. 35 * 36 * Any of these list operations should be locked by priv_lock. 37 */ 38 spinlock_t priv_lock; 39 struct list_head priv_init; 40 struct list_head priv_tx; 41 struct list_head priv_free; 42 43 /* see comments for unlinking in stub_rx.c */ 44 struct list_head unlink_tx; 45 struct list_head unlink_free; 46 47 wait_queue_head_t tx_waitq; 48 }; 49 50 /* private data into urb->priv */ 51 struct stub_priv { 52 unsigned long seqnum; 53 struct list_head list; 54 struct stub_device *sdev; 55 struct urb *urb; 56 57 int unlinking; 58 }; 59 60 struct stub_unlink { 61 unsigned long seqnum; 62 struct list_head list; 63 __u32 status; 64 }; 65 66 /* same as SYSFS_BUS_ID_SIZE */ 67 #define BUSID_SIZE 32 68 69 struct bus_id_priv { 70 char name[BUSID_SIZE]; 71 char status; 72 int interf_count; 73 struct stub_device *sdev; 74 struct usb_device *udev; 75 char shutdown_busid; 76 spinlock_t busid_lock; 77 }; 78 79 /* stub_priv is allocated from stub_priv_cache */ 80 extern struct kmem_cache *stub_priv_cache; 81 82 /* stub_dev.c */ 83 extern struct usb_device_driver stub_driver; 84 85 /* stub_main.c */ 86 struct bus_id_priv *get_busid_priv(const char *busid); 87 void put_busid_priv(struct bus_id_priv *bid); 88 int del_match_busid(char *busid); 89 void stub_device_cleanup_urbs(struct stub_device *sdev); 90 91 /* stub_rx.c */ 92 int stub_rx_loop(void *data); 93 94 /* stub_tx.c */ 95 void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum, 96 __u32 status); 97 void stub_complete(struct urb *urb); 98 int stub_tx_loop(void *data); 99 100 #endif /* __USBIP_STUB_H */ 101