2 * Copyright (C) 2003-2008 Takahiro Hirofuchi
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.
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.
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,
20 #ifndef __USBIP_COMMON_H
21 #define __USBIP_COMMON_H
23 #include <linux/compiler.h>
24 #include <linux/device.h>
25 #include <linux/interrupt.h>
26 #include <linux/net.h>
27 #include <linux/printk.h>
28 #include <linux/spinlock.h>
29 #include <linux/types.h>
30 #include <linux/usb.h>
31 #include <linux/wait.h>
32 #include <uapi/linux/usbip.h>
34 #define USBIP_VERSION "1.0.0"
39 #define pr_fmt(fmt) KBUILD_MODNAME ": %s:%d: " fmt, __func__, __LINE__
41 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
45 usbip_debug_xmit = (1 << 0),
46 usbip_debug_sysfs = (1 << 1),
47 usbip_debug_urb = (1 << 2),
48 usbip_debug_eh = (1 << 3),
50 usbip_debug_stub_cmp = (1 << 8),
51 usbip_debug_stub_dev = (1 << 9),
52 usbip_debug_stub_rx = (1 << 10),
53 usbip_debug_stub_tx = (1 << 11),
55 usbip_debug_vhci_rh = (1 << 8),
56 usbip_debug_vhci_hc = (1 << 9),
57 usbip_debug_vhci_rx = (1 << 10),
58 usbip_debug_vhci_tx = (1 << 11),
59 usbip_debug_vhci_sysfs = (1 << 12)
62 #define usbip_dbg_flag_xmit (usbip_debug_flag & usbip_debug_xmit)
63 #define usbip_dbg_flag_vhci_rh (usbip_debug_flag & usbip_debug_vhci_rh)
64 #define usbip_dbg_flag_vhci_hc (usbip_debug_flag & usbip_debug_vhci_hc)
65 #define usbip_dbg_flag_vhci_rx (usbip_debug_flag & usbip_debug_vhci_rx)
66 #define usbip_dbg_flag_vhci_tx (usbip_debug_flag & usbip_debug_vhci_tx)
67 #define usbip_dbg_flag_stub_rx (usbip_debug_flag & usbip_debug_stub_rx)
68 #define usbip_dbg_flag_stub_tx (usbip_debug_flag & usbip_debug_stub_tx)
69 #define usbip_dbg_flag_vhci_sysfs (usbip_debug_flag & usbip_debug_vhci_sysfs)
71 extern unsigned long usbip_debug_flag;
72 extern struct device_attribute dev_attr_usbip_debug;
74 #define usbip_dbg_with_flag(flag, fmt, args...) \
76 if (flag & usbip_debug_flag) \
77 pr_debug(fmt, ##args); \
80 #define usbip_dbg_sysfs(fmt, args...) \
81 usbip_dbg_with_flag(usbip_debug_sysfs, fmt , ##args)
82 #define usbip_dbg_xmit(fmt, args...) \
83 usbip_dbg_with_flag(usbip_debug_xmit, fmt , ##args)
84 #define usbip_dbg_urb(fmt, args...) \
85 usbip_dbg_with_flag(usbip_debug_urb, fmt , ##args)
86 #define usbip_dbg_eh(fmt, args...) \
87 usbip_dbg_with_flag(usbip_debug_eh, fmt , ##args)
89 #define usbip_dbg_vhci_rh(fmt, args...) \
90 usbip_dbg_with_flag(usbip_debug_vhci_rh, fmt , ##args)
91 #define usbip_dbg_vhci_hc(fmt, args...) \
92 usbip_dbg_with_flag(usbip_debug_vhci_hc, fmt , ##args)
93 #define usbip_dbg_vhci_rx(fmt, args...) \
94 usbip_dbg_with_flag(usbip_debug_vhci_rx, fmt , ##args)
95 #define usbip_dbg_vhci_tx(fmt, args...) \
96 usbip_dbg_with_flag(usbip_debug_vhci_tx, fmt , ##args)
97 #define usbip_dbg_vhci_sysfs(fmt, args...) \
98 usbip_dbg_with_flag(usbip_debug_vhci_sysfs, fmt , ##args)
100 #define usbip_dbg_stub_cmp(fmt, args...) \
101 usbip_dbg_with_flag(usbip_debug_stub_cmp, fmt , ##args)
102 #define usbip_dbg_stub_rx(fmt, args...) \
103 usbip_dbg_with_flag(usbip_debug_stub_rx, fmt , ##args)
104 #define usbip_dbg_stub_tx(fmt, args...) \
105 usbip_dbg_with_flag(usbip_debug_stub_tx, fmt , ##args)
108 * USB/IP request headers
110 * Each request is transferred across the network to its counterpart, which
111 * facilitates the normal USB communication. The values contained in the headers
112 * are basically the same as in a URB. Currently, four request types are
115 * - USBIP_CMD_SUBMIT: a USB request block, corresponds to usb_submit_urb()
118 * - USBIP_RET_SUBMIT: the result of USBIP_CMD_SUBMIT
121 * - USBIP_CMD_UNLINK: an unlink request of a pending USBIP_CMD_SUBMIT,
122 * corresponds to usb_unlink_urb()
125 * - USBIP_RET_UNLINK: the result of USBIP_CMD_UNLINK
129 #define USBIP_CMD_SUBMIT 0x0001
130 #define USBIP_CMD_UNLINK 0x0002
131 #define USBIP_RET_SUBMIT 0x0003
132 #define USBIP_RET_UNLINK 0x0004
134 #define USBIP_DIR_OUT 0x00
135 #define USBIP_DIR_IN 0x01
138 * Arbitrary limit for the maximum number of isochronous packets in an URB,
139 * compare for example the uhci_submit_isochronous function in
140 * drivers/usb/host/uhci-q.c
142 #define USBIP_MAX_ISO_PACKETS 1024
145 * struct usbip_header_basic - data pertinent to every request
146 * @command: the usbip request type
147 * @seqnum: sequential number that identifies requests; incremented per
149 * @devid: specifies a remote USB device uniquely instead of busnum and devnum;
150 * in the stub driver, this value is ((busnum << 16) | devnum)
151 * @direction: direction of the transfer
152 * @ep: endpoint number
154 struct usbip_header_basic {
163 * struct usbip_header_cmd_submit - USBIP_CMD_SUBMIT packet header
164 * @transfer_flags: URB flags
165 * @transfer_buffer_length: the data size for (in) or (out) transfer
166 * @start_frame: initial frame for isochronous or interrupt transfers
167 * @number_of_packets: number of isochronous packets
168 * @interval: maximum time for the request on the server-side host controller
169 * @setup: setup data for a control request
171 struct usbip_header_cmd_submit {
172 __u32 transfer_flags;
173 __s32 transfer_buffer_length;
175 /* it is difficult for usbip to sync frames (reserved only?) */
177 __s32 number_of_packets;
180 unsigned char setup[8];
184 * struct usbip_header_ret_submit - USBIP_RET_SUBMIT packet header
185 * @status: return status of a non-iso request
186 * @actual_length: number of bytes transferred
187 * @start_frame: initial frame for isochronous or interrupt transfers
188 * @number_of_packets: number of isochronous packets
189 * @error_count: number of errors for isochronous transfers
191 struct usbip_header_ret_submit {
195 __s32 number_of_packets;
200 * struct usbip_header_cmd_unlink - USBIP_CMD_UNLINK packet header
201 * @seqnum: the URB seqnum to unlink
203 struct usbip_header_cmd_unlink {
208 * struct usbip_header_ret_unlink - USBIP_RET_UNLINK packet header
209 * @status: return status of the request
211 struct usbip_header_ret_unlink {
216 * struct usbip_header - common header for all usbip packets
217 * @base: the basic header
218 * @u: packet type dependent header
220 struct usbip_header {
221 struct usbip_header_basic base;
224 struct usbip_header_cmd_submit cmd_submit;
225 struct usbip_header_ret_submit ret_submit;
226 struct usbip_header_cmd_unlink cmd_unlink;
227 struct usbip_header_ret_unlink ret_unlink;
232 * This is the same as usb_iso_packet_descriptor but packed for pdu.
234 struct usbip_iso_packet_descriptor {
236 __u32 length; /* expected length */
247 #define USBIP_EH_SHUTDOWN (1 << 0)
248 #define USBIP_EH_BYE (1 << 1)
249 #define USBIP_EH_RESET (1 << 2)
250 #define USBIP_EH_UNUSABLE (1 << 3)
252 #define SDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_RESET | USBIP_EH_BYE)
253 #define SDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
254 #define SDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
255 #define SDEV_EVENT_ERROR_SUBMIT (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
256 #define SDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
258 #define VDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_RESET | USBIP_EH_BYE)
259 #define VDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
260 #define VDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
261 #define VDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
263 /* a common structure for stub_device and vhci_device */
264 struct usbip_device {
265 enum usbip_side side;
266 enum usbip_device_status status;
268 /* lock for status */
272 struct socket *tcp_socket;
274 struct task_struct *tcp_rx;
275 struct task_struct *tcp_tx;
278 struct task_struct *eh;
279 wait_queue_head_t eh_waitq;
282 void (*shutdown)(struct usbip_device *);
283 void (*reset)(struct usbip_device *);
284 void (*unusable)(struct usbip_device *);
288 #define kthread_get_run(threadfn, data, namefmt, ...) \
290 struct task_struct *__k \
291 = kthread_create(threadfn, data, namefmt, ## __VA_ARGS__); \
292 if (!IS_ERR(__k)) { \
293 get_task_struct(__k); \
294 wake_up_process(__k); \
299 #define kthread_stop_put(k) \
302 put_task_struct(k); \
306 void usbip_dump_urb(struct urb *purb);
307 void usbip_dump_header(struct usbip_header *pdu);
309 int usbip_recv(struct socket *sock, void *buf, int size);
311 void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
313 void usbip_header_correct_endian(struct usbip_header *pdu, int send);
315 struct usbip_iso_packet_descriptor*
316 usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen);
318 /* some members of urb must be substituted before. */
319 int usbip_recv_iso(struct usbip_device *ud, struct urb *urb);
320 void usbip_pad_iso(struct usbip_device *ud, struct urb *urb);
321 int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb);
324 int usbip_start_eh(struct usbip_device *ud);
325 void usbip_stop_eh(struct usbip_device *ud);
326 void usbip_event_add(struct usbip_device *ud, unsigned long event);
327 int usbip_event_happened(struct usbip_device *ud);
329 static inline int interface_to_busnum(struct usb_interface *interface)
331 struct usb_device *udev = interface_to_usbdev(interface);
333 return udev->bus->busnum;
336 static inline int interface_to_devnum(struct usb_interface *interface)
338 struct usb_device *udev = interface_to_usbdev(interface);
343 #endif /* __USBIP_COMMON_H */