2 * Copyright (C) 2003-2008 Takahiro Hirofuchi
3 * Copyright (C) 2015-2016 Samsung Electronics
6 * This is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
22 #ifndef __USBIP_COMMON_H
23 #define __USBIP_COMMON_H
25 #include <linux/compiler.h>
26 #include <linux/device.h>
27 #include <linux/interrupt.h>
28 #include <linux/net.h>
29 #include <linux/printk.h>
30 #include <linux/spinlock.h>
31 #include <linux/types.h>
32 #include <linux/usb.h>
33 #include <linux/wait.h>
34 #include <linux/sched/task.h>
35 #include <uapi/linux/usbip.h>
37 #define USBIP_VERSION "1.0.0"
42 #define pr_fmt(fmt) KBUILD_MODNAME ": %s:%d: " fmt, __func__, __LINE__
44 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
48 usbip_debug_xmit = (1 << 0),
49 usbip_debug_sysfs = (1 << 1),
50 usbip_debug_urb = (1 << 2),
51 usbip_debug_eh = (1 << 3),
53 usbip_debug_stub_cmp = (1 << 8),
54 usbip_debug_stub_dev = (1 << 9),
55 usbip_debug_stub_rx = (1 << 10),
56 usbip_debug_stub_tx = (1 << 11),
58 usbip_debug_vhci_rh = (1 << 8),
59 usbip_debug_vhci_hc = (1 << 9),
60 usbip_debug_vhci_rx = (1 << 10),
61 usbip_debug_vhci_tx = (1 << 11),
62 usbip_debug_vhci_sysfs = (1 << 12)
65 #define usbip_dbg_flag_xmit (usbip_debug_flag & usbip_debug_xmit)
66 #define usbip_dbg_flag_vhci_rh (usbip_debug_flag & usbip_debug_vhci_rh)
67 #define usbip_dbg_flag_vhci_hc (usbip_debug_flag & usbip_debug_vhci_hc)
68 #define usbip_dbg_flag_vhci_rx (usbip_debug_flag & usbip_debug_vhci_rx)
69 #define usbip_dbg_flag_vhci_tx (usbip_debug_flag & usbip_debug_vhci_tx)
70 #define usbip_dbg_flag_stub_rx (usbip_debug_flag & usbip_debug_stub_rx)
71 #define usbip_dbg_flag_stub_tx (usbip_debug_flag & usbip_debug_stub_tx)
72 #define usbip_dbg_flag_vhci_sysfs (usbip_debug_flag & usbip_debug_vhci_sysfs)
74 extern unsigned long usbip_debug_flag;
75 extern struct device_attribute dev_attr_usbip_debug;
77 #define usbip_dbg_with_flag(flag, fmt, args...) \
79 if (flag & usbip_debug_flag) \
80 pr_debug(fmt, ##args); \
83 #define usbip_dbg_sysfs(fmt, args...) \
84 usbip_dbg_with_flag(usbip_debug_sysfs, fmt , ##args)
85 #define usbip_dbg_xmit(fmt, args...) \
86 usbip_dbg_with_flag(usbip_debug_xmit, fmt , ##args)
87 #define usbip_dbg_urb(fmt, args...) \
88 usbip_dbg_with_flag(usbip_debug_urb, fmt , ##args)
89 #define usbip_dbg_eh(fmt, args...) \
90 usbip_dbg_with_flag(usbip_debug_eh, fmt , ##args)
92 #define usbip_dbg_vhci_rh(fmt, args...) \
93 usbip_dbg_with_flag(usbip_debug_vhci_rh, fmt , ##args)
94 #define usbip_dbg_vhci_hc(fmt, args...) \
95 usbip_dbg_with_flag(usbip_debug_vhci_hc, fmt , ##args)
96 #define usbip_dbg_vhci_rx(fmt, args...) \
97 usbip_dbg_with_flag(usbip_debug_vhci_rx, fmt , ##args)
98 #define usbip_dbg_vhci_tx(fmt, args...) \
99 usbip_dbg_with_flag(usbip_debug_vhci_tx, fmt , ##args)
100 #define usbip_dbg_vhci_sysfs(fmt, args...) \
101 usbip_dbg_with_flag(usbip_debug_vhci_sysfs, fmt , ##args)
103 #define usbip_dbg_stub_cmp(fmt, args...) \
104 usbip_dbg_with_flag(usbip_debug_stub_cmp, fmt , ##args)
105 #define usbip_dbg_stub_rx(fmt, args...) \
106 usbip_dbg_with_flag(usbip_debug_stub_rx, fmt , ##args)
107 #define usbip_dbg_stub_tx(fmt, args...) \
108 usbip_dbg_with_flag(usbip_debug_stub_tx, fmt , ##args)
111 * USB/IP request headers
113 * Each request is transferred across the network to its counterpart, which
114 * facilitates the normal USB communication. The values contained in the headers
115 * are basically the same as in a URB. Currently, four request types are
118 * - USBIP_CMD_SUBMIT: a USB request block, corresponds to usb_submit_urb()
121 * - USBIP_RET_SUBMIT: the result of USBIP_CMD_SUBMIT
124 * - USBIP_CMD_UNLINK: an unlink request of a pending USBIP_CMD_SUBMIT,
125 * corresponds to usb_unlink_urb()
128 * - USBIP_RET_UNLINK: the result of USBIP_CMD_UNLINK
132 #define USBIP_CMD_SUBMIT 0x0001
133 #define USBIP_CMD_UNLINK 0x0002
134 #define USBIP_RET_SUBMIT 0x0003
135 #define USBIP_RET_UNLINK 0x0004
137 #define USBIP_DIR_OUT 0x00
138 #define USBIP_DIR_IN 0x01
141 * struct usbip_header_basic - data pertinent to every request
142 * @command: the usbip request type
143 * @seqnum: sequential number that identifies requests; incremented per
145 * @devid: specifies a remote USB device uniquely instead of busnum and devnum;
146 * in the stub driver, this value is ((busnum << 16) | devnum)
147 * @direction: direction of the transfer
148 * @ep: endpoint number
150 struct usbip_header_basic {
159 * struct usbip_header_cmd_submit - USBIP_CMD_SUBMIT packet header
160 * @transfer_flags: URB flags
161 * @transfer_buffer_length: the data size for (in) or (out) transfer
162 * @start_frame: initial frame for isochronous or interrupt transfers
163 * @number_of_packets: number of isochronous packets
164 * @interval: maximum time for the request on the server-side host controller
165 * @setup: setup data for a control request
167 struct usbip_header_cmd_submit {
168 __u32 transfer_flags;
169 __s32 transfer_buffer_length;
171 /* it is difficult for usbip to sync frames (reserved only?) */
173 __s32 number_of_packets;
176 unsigned char setup[8];
180 * struct usbip_header_ret_submit - USBIP_RET_SUBMIT packet header
181 * @status: return status of a non-iso request
182 * @actual_length: number of bytes transferred
183 * @start_frame: initial frame for isochronous or interrupt transfers
184 * @number_of_packets: number of isochronous packets
185 * @error_count: number of errors for isochronous transfers
187 struct usbip_header_ret_submit {
191 __s32 number_of_packets;
196 * struct usbip_header_cmd_unlink - USBIP_CMD_UNLINK packet header
197 * @seqnum: the URB seqnum to unlink
199 struct usbip_header_cmd_unlink {
204 * struct usbip_header_ret_unlink - USBIP_RET_UNLINK packet header
205 * @status: return status of the request
207 struct usbip_header_ret_unlink {
212 * struct usbip_header - common header for all usbip packets
213 * @base: the basic header
214 * @u: packet type dependent header
216 struct usbip_header {
217 struct usbip_header_basic base;
220 struct usbip_header_cmd_submit cmd_submit;
221 struct usbip_header_ret_submit ret_submit;
222 struct usbip_header_cmd_unlink cmd_unlink;
223 struct usbip_header_ret_unlink ret_unlink;
228 * This is the same as usb_iso_packet_descriptor but packed for pdu.
230 struct usbip_iso_packet_descriptor {
232 __u32 length; /* expected length */
244 #define USBIP_EH_SHUTDOWN (1 << 0)
245 #define USBIP_EH_BYE (1 << 1)
246 #define USBIP_EH_RESET (1 << 2)
247 #define USBIP_EH_UNUSABLE (1 << 3)
249 #define SDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_BYE)
250 #define SDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
251 #define SDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
252 #define SDEV_EVENT_ERROR_SUBMIT (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
253 #define SDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
255 #define VUDC_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_RESET | USBIP_EH_BYE)
256 #define VUDC_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
257 #define VUDC_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
258 /* catastrophic emulated usb error */
259 #define VUDC_EVENT_ERROR_USB (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
260 #define VUDC_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
262 #define VDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_BYE)
263 #define VDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
264 #define VDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
265 #define VDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
267 /* a common structure for stub_device and vhci_device */
268 struct usbip_device {
269 enum usbip_side side;
270 enum usbip_device_status status;
272 /* lock for status */
275 struct socket *tcp_socket;
277 struct task_struct *tcp_rx;
278 struct task_struct *tcp_tx;
281 wait_queue_head_t eh_waitq;
284 void (*shutdown)(struct usbip_device *);
285 void (*reset)(struct usbip_device *);
286 void (*unusable)(struct usbip_device *);
290 #define kthread_get_run(threadfn, data, namefmt, ...) \
292 struct task_struct *__k \
293 = kthread_create(threadfn, data, namefmt, ## __VA_ARGS__); \
294 if (!IS_ERR(__k)) { \
295 get_task_struct(__k); \
296 wake_up_process(__k); \
301 #define kthread_stop_put(k) \
304 put_task_struct(k); \
308 void usbip_dump_urb(struct urb *purb);
309 void usbip_dump_header(struct usbip_header *pdu);
311 int usbip_recv(struct socket *sock, void *buf, int size);
313 void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
315 void usbip_header_correct_endian(struct usbip_header *pdu, int send);
317 struct usbip_iso_packet_descriptor*
318 usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen);
320 /* some members of urb must be substituted before. */
321 int usbip_recv_iso(struct usbip_device *ud, struct urb *urb);
322 void usbip_pad_iso(struct usbip_device *ud, struct urb *urb);
323 int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb);
326 int usbip_init_eh(void);
327 void usbip_finish_eh(void);
328 int usbip_start_eh(struct usbip_device *ud);
329 void usbip_stop_eh(struct usbip_device *ud);
330 void usbip_event_add(struct usbip_device *ud, unsigned long event);
331 int usbip_event_happened(struct usbip_device *ud);
332 int usbip_in_eh(struct task_struct *task);
334 static inline int interface_to_busnum(struct usb_interface *interface)
336 struct usb_device *udev = interface_to_usbdev(interface);
338 return udev->bus->busnum;
341 static inline int interface_to_devnum(struct usb_interface *interface)
343 struct usb_device *udev = interface_to_usbdev(interface);
348 #endif /* __USBIP_COMMON_H */