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authorTakahiro Hirofuchi <hirofuchi@users.sourceforge.net>2008-07-09 16:56:51 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-10-10 18:31:09 -0400
commit04679b3489e048cd5dae79e050a3afed8e4e42b6 (patch)
treea283cfe4b3eaf70d1e3b6eafa769a67a983e0f52
parent05a1f28e879e3b4d6a9c08e30b1898943f77b6e7 (diff)
Staging: USB/IP: add client driver
This adds the USB IP client driver Brian Merrell cleaned up a lot of this code and submitted it for inclusion. Greg also did a lot of cleanup. Signed-off-by: Brian G. Merrell <bgmerrell@novell.com> Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat
-rw-r--r--drivers/staging/usbip/Kconfig11
-rw-r--r--drivers/staging/usbip/Makefile3
-rw-r--r--drivers/staging/usbip/vhci.h142
-rw-r--r--drivers/staging/usbip/vhci_hcd.c1275
-rw-r--r--drivers/staging/usbip/vhci_rx.c251
-rw-r--r--drivers/staging/usbip/vhci_sysfs.c250
-rw-r--r--drivers/staging/usbip/vhci_tx.c239
7 files changed, 2171 insertions, 0 deletions
diff --git a/drivers/staging/usbip/Kconfig b/drivers/staging/usbip/Kconfig
index 37efb5e1bb82..c4d68e1581fc 100644
--- a/drivers/staging/usbip/Kconfig
+++ b/drivers/staging/usbip/Kconfig
@@ -12,3 +12,14 @@ config USB_IP_COMMON
12 module will be called usbip_common_mod. 12 module will be called usbip_common_mod.
13 13
14 If unsure, say N. 14 If unsure, say N.
15
16config USB_IP_VHCI_HCD
17 tristate "USB IP client driver"
18 depends on USB_IP_COMMON
19 default N
20 ---help---
21 This enables the USB IP host controller driver which will
22 run on the client machine.
23
24 To compile this driver as a module, choose M here: the
25 module will be called vhci_hcd.
diff --git a/drivers/staging/usbip/Makefile b/drivers/staging/usbip/Makefile
index ce925caa6083..6ef4c3913f45 100644
--- a/drivers/staging/usbip/Makefile
+++ b/drivers/staging/usbip/Makefile
@@ -1,6 +1,9 @@
1obj-$(CONFIG_USB_IP_COMMON) += usbip_common_mod.o 1obj-$(CONFIG_USB_IP_COMMON) += usbip_common_mod.o
2usbip_common_mod-objs := usbip_common.o usbip_event.o 2usbip_common_mod-objs := usbip_common.o usbip_event.o
3 3
4obj-$(CONFIG_USB_IP_VHCI_HCD) += vhci-hcd.o
5vhci-hcd-objs := vhci_sysfs.o vhci_tx.o vhci_rx.o vhci_hcd.o
6
4ifeq ($(CONFIG_USB_DEBUG),y) 7ifeq ($(CONFIG_USB_DEBUG),y)
5 EXTRA_CFLAGS += -DDEBUG 8 EXTRA_CFLAGS += -DDEBUG
6endif 9endif
diff --git a/drivers/staging/usbip/vhci.h b/drivers/staging/usbip/vhci.h
new file mode 100644
index 000000000000..5e375173bbce
--- /dev/null
+++ b/drivers/staging/usbip/vhci.h
@@ -0,0 +1,142 @@
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/platform_device.h>
21#include "../../usb/core/hcd.h"
22
23
24struct vhci_device {
25 struct usb_device *udev;
26
27 /*
28 * devid specifies a remote usb device uniquely instead
29 * of combination of busnum and devnum.
30 */
31 __u32 devid;
32
33 /* speed of a remote device */
34 enum usb_device_speed speed;
35
36 /* vhci root-hub port to which this device is attached */
37 __u32 rhport;
38
39 struct usbip_device ud;
40
41
42 /* lock for the below link lists */
43 spinlock_t priv_lock;
44
45 /* vhci_priv is linked to one of them. */
46 struct list_head priv_tx;
47 struct list_head priv_rx;
48
49 /* vhci_unlink is linked to one of them */
50 struct list_head unlink_tx;
51 struct list_head unlink_rx;
52
53 /* vhci_tx thread sleeps for this queue */
54 wait_queue_head_t waitq_tx;
55};
56
57
58/* urb->hcpriv, use container_of() */
59struct vhci_priv {
60 unsigned long seqnum;
61 struct list_head list;
62
63 struct vhci_device *vdev;
64 struct urb *urb;
65};
66
67
68struct vhci_unlink {
69 /* seqnum of this request */
70 unsigned long seqnum;
71
72 struct list_head list;
73
74 /* seqnum of the unlink target */
75 unsigned long unlink_seqnum;
76};
77
78/*
79 * The number of ports is less than 16 ?
80 * USB_MAXCHILDREN is statically defined to 16 in usb.h. Its maximum value
81 * would be 31 because the event_bits[1] of struct usb_hub is defined as
82 * unsigned long in hub.h
83 */
84#define VHCI_NPORTS 8
85
86/* for usb_bus.hcpriv */
87struct vhci_hcd {
88 spinlock_t lock;
89
90 u32 port_status[VHCI_NPORTS];
91
92 unsigned resuming:1;
93 unsigned long re_timeout;
94
95 atomic_t seqnum;
96
97 /*
98 * NOTE:
99 * wIndex shows the port number and begins from 1.
100 * But, the index of this array begins from 0.
101 */
102 struct vhci_device vdev[VHCI_NPORTS];
103
104 /* vhci_device which has not been assiged its address yet */
105 int pending_port;
106};
107
108
109extern struct vhci_hcd *the_controller;
110extern struct attribute_group dev_attr_group;
111
112
113/*-------------------------------------------------------------------------*/
114/* prototype declaration */
115
116/* vhci_hcd.c */
117void rh_port_connect(int rhport, enum usb_device_speed speed);
118void rh_port_disconnect(int rhport);
119void vhci_rx_loop(struct usbip_task *ut);
120void vhci_tx_loop(struct usbip_task *ut);
121
122#define hardware (&the_controller->pdev.dev)
123
124static inline struct vhci_device *port_to_vdev(__u32 port)
125{
126 return &the_controller->vdev[port];
127}
128
129static inline struct vhci_hcd *hcd_to_vhci(struct usb_hcd *hcd)
130{
131 return (struct vhci_hcd *) (hcd->hcd_priv);
132}
133
134static inline struct usb_hcd *vhci_to_hcd(struct vhci_hcd *vhci)
135{
136 return container_of((void *) vhci, struct usb_hcd, hcd_priv);
137}
138
139static inline struct device *vhci_dev(struct vhci_hcd *vhci)
140{
141 return vhci_to_hcd(vhci)->self.controller;
142}
diff --git a/drivers/staging/usbip/vhci_hcd.c b/drivers/staging/usbip/vhci_hcd.c
new file mode 100644
index 000000000000..5b5a2e348ecb
--- /dev/null
+++ b/drivers/staging/usbip/vhci_hcd.c
@@ -0,0 +1,1275 @@
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
21#include "usbip_common.h"
22#include "vhci.h"
23
24#define DRIVER_VERSION "1.0"
25#define DRIVER_AUTHOR "Takahiro Hirofuchi"
26#define DRIVER_DESC "Virtual Host Controller Interface Driver for USB/IP"
27#define DRIVER_LICENCE "GPL"
28MODULE_AUTHOR(DRIVER_AUTHOR);
29MODULE_DESCRIPTION(DRIVER_DESC);
30MODULE_LICENSE(DRIVER_LICENCE);
31
32
33
34/*
35 * TODO
36 * - update root hub emulation
37 * - move the emulation code to userland ?
38 * porting to other operating systems
39 * minimize kernel code
40 * - add suspend/resume code
41 * - clean up everything
42 */
43
44
45/* See usb gadget dummy hcd */
46
47
48static int vhci_hub_status(struct usb_hcd *hcd, char *buff);
49static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
50 u16 wIndex, char *buff, u16 wLength);
51static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
52 gfp_t mem_flags);
53static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
54static int vhci_start(struct usb_hcd *vhci_hcd);
55static void vhci_stop(struct usb_hcd *hcd);
56static int vhci_get_frame_number(struct usb_hcd *hcd);
57
58static const char driver_name[] = "vhci_hcd";
59static const char driver_desc[] = "USB/IP Virtual Host Contoroller";
60
61struct vhci_hcd *the_controller;
62
63static const char *bit_desc[] = {
64 "CONNECTION", /*0*/
65 "ENABLE", /*1*/
66 "SUSPEND", /*2*/
67 "OVER_CURRENT", /*3*/
68 "RESET", /*4*/
69 "R5", /*5*/
70 "R6", /*6*/
71 "R7", /*7*/
72 "POWER", /*8*/
73 "LOWSPEED", /*9*/
74 "HIGHSPEED", /*10*/
75 "PORT_TEST", /*11*/
76 "INDICATOR", /*12*/
77 "R13", /*13*/
78 "R14", /*14*/
79 "R15", /*15*/
80 "C_CONNECTION", /*16*/
81 "C_ENABLE", /*17*/
82 "C_SUSPEND", /*18*/
83 "C_OVER_CURRENT", /*19*/
84 "C_RESET", /*20*/
85 "R21", /*21*/
86 "R22", /*22*/
87 "R23", /*23*/
88 "R24", /*24*/
89 "R25", /*25*/
90 "R26", /*26*/
91 "R27", /*27*/
92 "R28", /*28*/
93 "R29", /*29*/
94 "R30", /*30*/
95 "R31", /*31*/
96};
97
98
99static void dump_port_status(u32 status)
100{
101 int i = 0;
102
103 printk(KERN_DEBUG "status %08x:", status);
104 for (i = 0; i < 32; i++) {
105 if (status & (1 << i))
106 printk(" %s", bit_desc[i]);
107 }
108
109 printk("\n");
110}
111
112
113
114void rh_port_connect(int rhport, enum usb_device_speed speed)
115{
116 unsigned long flags;
117
118 dbg_vhci_rh("rh_port_connect %d\n", rhport);
119
120 spin_lock_irqsave(&the_controller->lock, flags);
121
122 the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION
123 | (1 << USB_PORT_FEAT_C_CONNECTION);
124
125 switch (speed) {
126 case USB_SPEED_HIGH:
127 the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED;
128 break;
129 case USB_SPEED_LOW:
130 the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED;
131 break;
132 default:
133 break;
134 }
135
136 /* spin_lock(&the_controller->vdev[rhport].ud.lock);
137 * the_controller->vdev[rhport].ud.status = VDEV_CONNECT;
138 * spin_unlock(&the_controller->vdev[rhport].ud.lock); */
139
140 the_controller->pending_port = rhport;
141
142 spin_unlock_irqrestore(&the_controller->lock, flags);
143
144 usb_hcd_poll_rh_status(vhci_to_hcd(the_controller));
145}
146
147void rh_port_disconnect(int rhport)
148{
149 unsigned long flags;
150
151 dbg_vhci_rh("rh_port_disconnect %d\n", rhport);
152
153 spin_lock_irqsave(&the_controller->lock, flags);
154 /* stop_activity(dum, driver); */
155 the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION;
156 the_controller->port_status[rhport] |=
157 (1 << USB_PORT_FEAT_C_CONNECTION);
158
159
160 /* not yet complete the disconnection
161 * spin_lock(&vdev->ud.lock);
162 * vdev->ud.status = VHC_ST_DISCONNECT;
163 * spin_unlock(&vdev->ud.lock); */
164
165 spin_unlock_irqrestore(&the_controller->lock, flags);
166}
167
168
169
170/*----------------------------------------------------------------------*/
171
172#define PORT_C_MASK \
173 ((USB_PORT_STAT_C_CONNECTION \
174 | USB_PORT_STAT_C_ENABLE \
175 | USB_PORT_STAT_C_SUSPEND \
176 | USB_PORT_STAT_C_OVERCURRENT \
177 | USB_PORT_STAT_C_RESET) << 16)
178
179/*
180 * This function is almostly the same as dummy_hcd.c:dummy_hub_status() without
181 * suspend/resume support. But, it is modified to provide multiple ports.
182 *
183 * @buf: a bitmap to show which port status has been changed.
184 * bit 0: reserved or used for another purpose?
185 * bit 1: the status of port 0 has been changed.
186 * bit 2: the status of port 1 has been changed.
187 * ...
188 * bit 7: the status of port 6 has been changed.
189 * bit 8: the status of port 7 has been changed.
190 * ...
191 * bit 15: the status of port 14 has been changed.
192 *
193 * So, the maximum number of ports is 31 ( port 0 to port 30) ?
194 *
195 * The return value is the actual transfered length in byte. If nothing has
196 * been changed, return 0. In the case that the number of ports is less than or
197 * equal to 6 (VHCI_NPORTS==7), return 1.
198 *
199 */
200static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
201{
202 struct vhci_hcd *vhci;
203 unsigned long flags;
204 int retval = 0;
205
206 /* the enough buffer is allocated according to USB_MAXCHILDREN */
207 unsigned long *event_bits = (unsigned long *) buf;
208 int rhport;
209 int changed = 0;
210
211
212 *event_bits = 0;
213
214 vhci = hcd_to_vhci(hcd);
215
216 spin_lock_irqsave(&vhci->lock, flags);
217 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
218 dbg_vhci_rh("hw accessible flag in on?\n");
219 goto done;
220 }
221
222 /* check pseudo status register for each port */
223 for (rhport = 0; rhport < VHCI_NPORTS; rhport++) {
224 if ((vhci->port_status[rhport] & PORT_C_MASK)) {
225 /* The status of a port has been changed, */
226 dbg_vhci_rh("port %d is changed\n", rhport);
227
228 *event_bits |= 1 << (rhport + 1);
229 changed = 1;
230 }
231 }
232
233 uinfo("changed %d\n", changed);
234
235 if (hcd->state == HC_STATE_SUSPENDED)
236 usb_hcd_resume_root_hub(hcd);
237
238 if (changed)
239 retval = 1 + (VHCI_NPORTS / 8);
240 else
241 retval = 0;
242
243done:
244 spin_unlock_irqrestore(&vhci->lock, flags);
245 return retval;
246}
247
248/* See hub_configure in hub.c */
249static inline void hub_descriptor(struct usb_hub_descriptor *desc)
250{
251 memset(desc, 0, sizeof(*desc));
252 desc->bDescriptorType = 0x29;
253 desc->bDescLength = 9;
254 desc->wHubCharacteristics = (__force __u16)
255 (__constant_cpu_to_le16(0x0001));
256 desc->bNbrPorts = VHCI_NPORTS;
257 desc->bitmap[0] = 0xff;
258 desc->bitmap[1] = 0xff;
259}
260
261static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
262 u16 wIndex, char *buf, u16 wLength)
263{
264 struct vhci_hcd *dum;
265 int retval = 0;
266 unsigned long flags;
267 int rhport;
268
269 u32 prev_port_status[VHCI_NPORTS];
270
271 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
272 return -ETIMEDOUT;
273
274 /*
275 * NOTE:
276 * wIndex shows the port number and begins from 1.
277 */
278 dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue,
279 wIndex);
280 if (wIndex > VHCI_NPORTS)
281 printk(KERN_ERR "%s: invalid port number %d\n", __func__, wIndex);
282 rhport = ((__u8)(wIndex & 0x00ff)) - 1;
283
284 dum = hcd_to_vhci(hcd);
285
286 spin_lock_irqsave(&dum->lock, flags);
287
288 /* store old status and compare now and old later */
289 if (dbg_flag_vhci_rh) {
290 int i = 0;
291 for (i = 0; i < VHCI_NPORTS; i++)
292 prev_port_status[i] = dum->port_status[i];
293 }
294
295 switch (typeReq) {
296 case ClearHubFeature:
297 dbg_vhci_rh(" ClearHubFeature\n");
298 break;
299 case ClearPortFeature:
300 switch (wValue) {
301 case USB_PORT_FEAT_SUSPEND:
302 if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) {
303 /* 20msec signaling */
304 dum->resuming = 1;
305 dum->re_timeout =
306 jiffies + msecs_to_jiffies(20);
307 }
308 break;
309 case USB_PORT_FEAT_POWER:
310 dbg_vhci_rh(" ClearPortFeature: USB_PORT_FEAT_POWER\n");
311 dum->port_status[rhport] = 0;
312 /* dum->address = 0; */
313 /* dum->hdev = 0; */
314 dum->resuming = 0;
315 break;
316 case USB_PORT_FEAT_C_RESET:
317 dbg_vhci_rh(" ClearPortFeature: "
318 "USB_PORT_FEAT_C_RESET\n");
319 switch (dum->vdev[rhport].speed) {
320 case USB_SPEED_HIGH:
321 dum->port_status[rhport] |=
322 USB_PORT_STAT_HIGH_SPEED;
323 break;
324 case USB_SPEED_LOW:
325 dum->port_status[rhport] |=
326 USB_PORT_STAT_LOW_SPEED;
327 break;
328 default:
329 break;
330 }
331 default:
332 dbg_vhci_rh(" ClearPortFeature: default %x\n", wValue);
333 dum->port_status[rhport] &= ~(1 << wValue);
334 }
335 break;
336 case GetHubDescriptor:
337 dbg_vhci_rh(" GetHubDescriptor\n");
338 hub_descriptor((struct usb_hub_descriptor *) buf);
339 break;
340 case GetHubStatus:
341 dbg_vhci_rh(" GetHubStatus\n");
342 *(__le32 *) buf = __constant_cpu_to_le32(0);
343 break;
344 case GetPortStatus:
345 dbg_vhci_rh(" GetPortStatus port %x\n", wIndex);
346 if (wIndex > VHCI_NPORTS || wIndex < 1) {
347 printk(KERN_ERR "%s: invalid port number %d\n",
348 __func__, wIndex);
349 retval = -EPIPE;
350 }
351
352 /* we do no care of resume. */
353
354 /* whoever resets or resumes must GetPortStatus to
355 * complete it!!
356 * */
357 if (dum->resuming && time_after(jiffies, dum->re_timeout)) {
358 printk(KERN_ERR "%s: not yet\n", __func__);
359 dum->port_status[rhport] |=
360 (1 << USB_PORT_FEAT_C_SUSPEND);
361 dum->port_status[rhport] &=
362 ~(1 << USB_PORT_FEAT_SUSPEND);
363 dum->resuming = 0;
364 dum->re_timeout = 0;
365 /* if (dum->driver && dum->driver->resume) {
366 * spin_unlock (&dum->lock);
367 * dum->driver->resume (&dum->gadget);
368 * spin_lock (&dum->lock);
369 * } */
370 }
371
372 if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) !=
373 0 && time_after(jiffies, dum->re_timeout)) {
374 dum->port_status[rhport] |=
375 (1 << USB_PORT_FEAT_C_RESET);
376 dum->port_status[rhport] &=
377 ~(1 << USB_PORT_FEAT_RESET);
378 dum->re_timeout = 0;
379
380 if (dum->vdev[rhport].ud.status ==
381 VDEV_ST_NOTASSIGNED) {
382 dbg_vhci_rh(" enable rhport %d (status %u)\n",
383 rhport,
384 dum->vdev[rhport].ud.status);
385 dum->port_status[rhport] |=
386 USB_PORT_STAT_ENABLE;
387 }
388#if 0
389 if (dum->driver) {
390
391 dum->port_status[rhport] |=
392 USB_PORT_STAT_ENABLE;
393 /* give it the best speed we agree on */
394 dum->gadget.speed = dum->driver->speed;
395 dum->gadget.ep0->maxpacket = 64;
396 switch (dum->gadget.speed) {
397 case USB_SPEED_HIGH:
398 dum->port_status[rhport] |=
399 USB_PORT_STAT_HIGH_SPEED;
400 break;
401 case USB_SPEED_LOW:
402 dum->gadget.ep0->maxpacket = 8;
403 dum->port_status[rhport] |=
404 USB_PORT_STAT_LOW_SPEED;
405 break;
406 default:
407 dum->gadget.speed = USB_SPEED_FULL;
408 break;
409 }
410 }
411#endif
412
413 }
414 ((u16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]);
415 ((u16 *) buf)[1] =
416 cpu_to_le16(dum->port_status[rhport] >> 16);
417
418 dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0],
419 ((u16 *)buf)[1]);
420 break;
421 case SetHubFeature:
422 dbg_vhci_rh(" SetHubFeature\n");
423 retval = -EPIPE;
424 break;
425 case SetPortFeature:
426 switch (wValue) {
427 case USB_PORT_FEAT_SUSPEND:
428 dbg_vhci_rh(" SetPortFeature: "
429 "USB_PORT_FEAT_SUSPEND\n");
430 printk(KERN_ERR "%s: not yet\n", __func__);
431#if 0
432 dum->port_status[rhport] |=
433 (1 << USB_PORT_FEAT_SUSPEND);
434 if (dum->driver->suspend) {
435 spin_unlock(&dum->lock);
436 dum->driver->suspend(&dum->gadget);
437 spin_lock(&dum->lock);
438 }
439#endif
440 break;
441 case USB_PORT_FEAT_RESET:
442 dbg_vhci_rh(" SetPortFeature: USB_PORT_FEAT_RESET\n");
443 /* if it's already running, disconnect first */
444 if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) {
445 dum->port_status[rhport] &=
446 ~(USB_PORT_STAT_ENABLE |
447 USB_PORT_STAT_LOW_SPEED |
448 USB_PORT_STAT_HIGH_SPEED);
449#if 0
450 if (dum->driver) {
451 dev_dbg(hardware, "disconnect\n");
452 stop_activity(dum, dum->driver);
453 }
454#endif
455
456 /* FIXME test that code path! */
457 }
458 /* 50msec reset signaling */
459 dum->re_timeout = jiffies + msecs_to_jiffies(50);
460
461 /* FALLTHROUGH */
462 default:
463 dbg_vhci_rh(" SetPortFeature: default %d\n", wValue);
464 dum->port_status[rhport] |= (1 << wValue);
465 }
466 break;
467
468 default:
469 printk(KERN_ERR "%s: default: no such request\n", __func__);
470 /* dev_dbg (hardware,
471 * "hub control req%04x v%04x i%04x l%d\n",
472 * typeReq, wValue, wIndex, wLength); */
473
474 /* "protocol stall" on error */
475 retval = -EPIPE;
476 }
477
478 if (dbg_flag_vhci_rh) {
479 printk(KERN_DEBUG "port %d\n", rhport);
480 dump_port_status(prev_port_status[rhport]);
481 dump_port_status(dum->port_status[rhport]);
482 }
483 dbg_vhci_rh(" bye\n");
484
485 spin_unlock_irqrestore(&dum->lock, flags);
486
487 return retval;
488}
489
490
491
492/*----------------------------------------------------------------------*/
493
494static struct vhci_device *get_vdev(struct usb_device *udev)
495{
496 int i;
497
498 if (!udev)
499 return NULL;
500
501 for (i = 0; i < VHCI_NPORTS; i++)
502 if (the_controller->vdev[i].udev == udev)
503 return port_to_vdev(i);
504
505 return NULL;
506}
507
508static void vhci_tx_urb(struct urb *urb)
509{
510 struct vhci_device *vdev = get_vdev(urb->dev);
511 struct vhci_priv *priv;
512 unsigned long flag;
513
514 if (!vdev) {
515 err("could not get virtual device");
516 /* BUG(); */
517 return;
518 }
519
520 spin_lock_irqsave(&vdev->priv_lock, flag);
521
522 priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC);
523 if (!priv) {
524 dev_err(&urb->dev->dev, "malloc vhci_priv\n");
525 spin_unlock_irqrestore(&vdev->priv_lock, flag);
526 usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
527 return;
528 }
529
530 priv->seqnum = atomic_inc_return(&the_controller->seqnum);
531 if (priv->seqnum == 0xffff)
532 uinfo("seqnum max\n");
533
534 priv->vdev = vdev;
535 priv->urb = urb;
536
537 urb->hcpriv = (void *) priv;
538
539
540 list_add_tail(&priv->list, &vdev->priv_tx);
541
542 wake_up(&vdev->waitq_tx);
543 spin_unlock_irqrestore(&vdev->priv_lock, flag);
544}
545
546static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
547 gfp_t mem_flags)
548{
549 struct device *dev = &urb->dev->dev;
550 int ret = 0;
551 unsigned long flags;
552
553 dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n",
554 hcd, urb, mem_flags);
555
556 /* patch to usb_sg_init() is in 2.5.60 */
557 BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);
558
559 spin_lock_irqsave(&the_controller->lock, flags);
560
561 /* check HC is active or not */
562 if (!HC_IS_RUNNING(hcd->state)) {
563 dev_err(dev, "HC is not running\n");
564 spin_unlock_irqrestore(&the_controller->lock, flags);
565 return -ENODEV;
566 }
567
568 if (urb->status != -EINPROGRESS) {
569 dev_err(dev, "URB already unlinked!, status %d\n", urb->status);
570 spin_unlock_irqrestore(&the_controller->lock, flags);
571 return urb->status;
572 }
573
574 ret = usb_hcd_link_urb_to_ep(hcd, urb);
575 if (ret)
576 goto no_need_unlink;
577
578 /*
579 * The enumelation process is as follows;
580 *
581 * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0)
582 * to get max packet length of default pipe
583 *
584 * 2. Set_Address request to DevAddr(0) EndPoint(0)
585 *
586 */
587
588 if (usb_pipedevice(urb->pipe) == 0) {
589 __u8 type = usb_pipetype(urb->pipe);
590 struct usb_ctrlrequest *ctrlreq =
591 (struct usb_ctrlrequest *) urb->setup_packet;
592 struct vhci_device *vdev =
593 port_to_vdev(the_controller->pending_port);
594
595 if (type != PIPE_CONTROL || !ctrlreq) {
596 dev_err(dev, "invalid request to devnum 0\n");
597 ret = EINVAL;
598 goto no_need_xmit;
599 }
600
601 switch (ctrlreq->bRequest) {
602 case USB_REQ_SET_ADDRESS:
603 /* set_address may come when a device is reset */
604 dev_info(dev, "SetAddress Request (%d) to port %d\n",
605 ctrlreq->wValue, vdev->rhport);
606
607 vdev->udev = urb->dev;
608
609 spin_lock(&vdev->ud.lock);
610 vdev->ud.status = VDEV_ST_USED;
611 spin_unlock(&vdev->ud.lock);
612
613 if (urb->status == -EINPROGRESS) {
614 /* This request is successfully completed. */
615 /* If not -EINPROGRESS, possibly unlinked. */
616 urb->status = 0;
617 }
618
619 goto no_need_xmit;
620
621 case USB_REQ_GET_DESCRIPTOR:
622 if (ctrlreq->wValue == (USB_DT_DEVICE << 8))
623 dbg_vhci_hc("Not yet?: "
624 "Get_Descriptor to device 0 "
625 "(get max pipe size)\n");
626
627 /* FIXME: reference count? (usb_get_dev()) */
628 vdev->udev = urb->dev;
629 goto out;
630
631 default:
632 /* NOT REACHED */
633 dev_err(dev, "invalid request to devnum 0 bRequest %u, "
634 "wValue %u\n", ctrlreq->bRequest,
635 ctrlreq->wValue);
636 ret = -EINVAL;
637 goto no_need_xmit;
638 }
639
640 }
641
642out:
643 vhci_tx_urb(urb);
644
645 spin_unlock_irqrestore(&the_controller->lock, flags);
646
647 return 0;
648
649no_need_xmit:
650 usb_hcd_unlink_urb_from_ep(hcd, urb);
651no_need_unlink:
652 spin_unlock_irqrestore(&the_controller->lock, flags);
653
654 usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);
655
656 return 0;
657}
658
659/*
660 * vhci_rx gives back the urb after receiving the reply of the urb. If an
661 * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives
662 * back its urb. For the driver unlinking the urb, the content of the urb is
663 * not important, but the calling to its completion handler is important; the
664 * completion of unlinking is notified by the completion handler.
665 *
666 *
667 * CLIENT SIDE
668 *
669 * - When vhci_hcd receives RET_SUBMIT,
670 *
671 * - case 1a). the urb of the pdu is not unlinking.
672 * - normal case
673 * => just give back the urb
674 *
675 * - case 1b). the urb of the pdu is unlinking.
676 * - usbip.ko will return a reply of the unlinking request.
677 * => give back the urb now and go to case 2b).
678 *
679 * - When vhci_hcd receives RET_UNLINK,
680 *
681 * - case 2a). a submit request is still pending in vhci_hcd.
682 * - urb was really pending in usbip.ko and urb_unlink_urb() was
683 * completed there.
684 * => free a pending submit request
685 * => notify unlink completeness by giving back the urb
686 *
687 * - case 2b). a submit request is *not* pending in vhci_hcd.
688 * - urb was already given back to the core driver.
689 * => do not give back the urb
690 *
691 *
692 * SERVER SIDE
693 *
694 * - When usbip receives CMD_UNLINK,
695 *
696 * - case 3a). the urb of the unlink request is now in submission.
697 * => do usb_unlink_urb().
698 * => after the unlink is completed, send RET_UNLINK.
699 *
700 * - case 3b). the urb of the unlink request is not in submission.
701 * - may be already completed or never be received
702 * => send RET_UNLINK
703 *
704 */
705static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
706{
707 unsigned long flags;
708 struct vhci_priv *priv;
709 struct vhci_device *vdev;
710
711 uinfo("vhci_hcd: dequeue a urb %p\n", urb);
712
713
714 spin_lock_irqsave(&the_controller->lock, flags);
715
716 priv = urb->hcpriv;
717 if (!priv) {
718 /* URB was never linked! or will be soon given back by
719 * vhci_rx. */
720 spin_unlock_irqrestore(&the_controller->lock, flags);
721 return 0;
722 }
723
724 {
725 int ret = 0;
726 ret = usb_hcd_check_unlink_urb(hcd, urb, status);
727 if (ret) {
728 spin_unlock_irqrestore(&the_controller->lock, flags);
729 return 0;
730 }
731 }
732
733 /* send unlink request here? */
734 vdev = priv->vdev;
735
736 if (!vdev->ud.tcp_socket) {
737 /* tcp connection is closed */
738 unsigned long flags2;
739
740 spin_lock_irqsave(&vdev->priv_lock, flags2);
741
742 uinfo("vhci_hcd: device %p seems to be disconnected\n", vdev);
743 list_del(&priv->list);
744 kfree(priv);
745 urb->hcpriv = NULL;
746
747 spin_unlock_irqrestore(&vdev->priv_lock, flags2);
748
749 } else {
750 /* tcp connection is alive */
751 unsigned long flags2;
752 struct vhci_unlink *unlink;
753
754 spin_lock_irqsave(&vdev->priv_lock, flags2);
755
756 /* setup CMD_UNLINK pdu */
757 unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC);
758 if (!unlink) {
759 uerr("malloc vhci_unlink\n");
760 spin_unlock_irqrestore(&vdev->priv_lock, flags2);
761 spin_unlock_irqrestore(&the_controller->lock, flags);
762 usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
763 return -ENOMEM;
764 }
765
766 unlink->seqnum = atomic_inc_return(&the_controller->seqnum);
767 if (unlink->seqnum == 0xffff)
768 uinfo("seqnum max\n");
769
770 unlink->unlink_seqnum = priv->seqnum;
771
772 uinfo("vhci_hcd: device %p seems to be still connected\n",
773 vdev);
774
775 /* send cmd_unlink and try to cancel the pending URB in the
776 * peer */
777 list_add_tail(&unlink->list, &vdev->unlink_tx);
778 wake_up(&vdev->waitq_tx);
779
780 spin_unlock_irqrestore(&vdev->priv_lock, flags2);
781 }
782
783
784 /*
785 * If tcp connection is alive, we have sent CMD_UNLINK.
786 * vhci_rx will receive RET_UNLINK and give back the URB.
787 * Otherwise, we give back it here.
788 */
789 if (!vdev->ud.tcp_socket) {
790 /* tcp connection is closed */
791 uinfo("vhci_hcd: vhci_urb_dequeue() gives back urb %p\n", urb);
792
793 usb_hcd_unlink_urb_from_ep(hcd, urb);
794
795 spin_unlock_irqrestore(&the_controller->lock, flags);
796 usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
797 urb->status);
798 spin_lock_irqsave(&the_controller->lock, flags);
799 }
800
801 spin_unlock_irqrestore(&the_controller->lock, flags);
802
803 dbg_vhci_hc("leave\n");
804 return 0;
805}
806
807
808static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
809{
810 struct vhci_unlink *unlink, *tmp;
811
812 spin_lock(&vdev->priv_lock);
813
814 list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
815 list_del(&unlink->list);
816 kfree(unlink);
817 }
818
819 list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) {
820 list_del(&unlink->list);
821 kfree(unlink);
822 }
823
824 spin_unlock(&vdev->priv_lock);
825}
826
827/*
828 * The important thing is that only one context begins cleanup.
829 * This is why error handling and cleanup become simple.
830 * We do not want to consider race condition as possible.
831 */
832static void vhci_shutdown_connection(struct usbip_device *ud)
833{
834 struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
835
836 /* need this? see stub_dev.c */
837 if (ud->tcp_socket) {
838 udbg("shutdown tcp_socket %p\n", ud->tcp_socket);
839 kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
840 }
841
842 usbip_stop_threads(&vdev->ud);
843 uinfo("stop threads\n");
844
845 /* active connection is closed */
846 if (vdev->ud.tcp_socket != NULL) {
847 sock_release(vdev->ud.tcp_socket);
848 vdev->ud.tcp_socket = NULL;
849 }
850 uinfo("release socket\n");
851
852 vhci_device_unlink_cleanup(vdev);
853
854 /*
855 * rh_port_disconnect() is a trigger of ...
856 * usb_disable_device():
857 * disable all the endpoints for a USB device.
858 * usb_disable_endpoint():
859 * disable endpoints. pending urbs are unlinked(dequeued).
860 *
861 * NOTE: After calling rh_port_disconnect(), the USB device drivers of a
862 * deteched device should release used urbs in a cleanup function(i.e.
863 * xxx_disconnect()). Therefore, vhci_hcd does not need to release
864 * pushed urbs and their private data in this function.
865 *
866 * NOTE: vhci_dequeue() must be considered carefully. When shutdowning
867 * a connection, vhci_shutdown_connection() expects vhci_dequeue()
868 * gives back pushed urbs and frees their private data by request of
869 * the cleanup function of a USB driver. When unlinking a urb with an
870 * active connection, vhci_dequeue() does not give back the urb which
871 * is actually given back by vhci_rx after receiving its return pdu.
872 *
873 */
874 rh_port_disconnect(vdev->rhport);
875
876 uinfo("disconnect device\n");
877}
878
879
880static void vhci_device_reset(struct usbip_device *ud)
881{
882 struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
883
884 spin_lock(&ud->lock);
885
886 vdev->speed = 0;
887 vdev->devid = 0;
888
889 ud->tcp_socket = NULL;
890
891 ud->status = VDEV_ST_NULL;
892
893 spin_unlock(&ud->lock);
894}
895
896static void vhci_device_unusable(struct usbip_device *ud)
897{
898 spin_lock(&ud->lock);
899
900 ud->status = VDEV_ST_ERROR;
901
902 spin_unlock(&ud->lock);
903}
904
905static void vhci_device_init(struct vhci_device *vdev)
906{
907 memset(vdev, 0, sizeof(*vdev));
908
909 usbip_task_init(&vdev->ud.tcp_rx, "vhci_rx", vhci_rx_loop);
910 usbip_task_init(&vdev->ud.tcp_tx, "vhci_tx", vhci_tx_loop);
911
912 vdev->ud.side = USBIP_VHCI;
913 vdev->ud.status = VDEV_ST_NULL;
914 /* vdev->ud.lock = SPIN_LOCK_UNLOCKED; */
915 spin_lock_init(&vdev->ud.lock);
916
917 INIT_LIST_HEAD(&vdev->priv_rx);
918 INIT_LIST_HEAD(&vdev->priv_tx);
919 INIT_LIST_HEAD(&vdev->unlink_tx);
920 INIT_LIST_HEAD(&vdev->unlink_rx);
921 /* vdev->priv_lock = SPIN_LOCK_UNLOCKED; */
922 spin_lock_init(&vdev->priv_lock);
923
924 init_waitqueue_head(&vdev->waitq_tx);
925
926 vdev->ud.eh_ops.shutdown = vhci_shutdown_connection;
927 vdev->ud.eh_ops.reset = vhci_device_reset;
928 vdev->ud.eh_ops.unusable = vhci_device_unusable;
929
930 usbip_start_eh(&vdev->ud);
931}
932
933
934/*----------------------------------------------------------------------*/
935
936static int vhci_start(struct usb_hcd *hcd)
937{
938 struct vhci_hcd *vhci = hcd_to_vhci(hcd);
939 int rhport;
940 int err = 0;
941
942 dbg_vhci_hc("enter vhci_start\n");
943
944
945 /* initialize private data of usb_hcd */
946
947 for (rhport = 0; rhport < VHCI_NPORTS; rhport++) {
948 struct vhci_device *vdev = &vhci->vdev[rhport];
949 vhci_device_init(vdev);
950 vdev->rhport = rhport;
951 }
952
953 atomic_set(&vhci->seqnum, 0);
954 spin_lock_init(&vhci->lock);
955
956
957
958 hcd->power_budget = 0; /* no limit */
959 hcd->state = HC_STATE_RUNNING;
960 hcd->uses_new_polling = 1;
961
962
963 /* vhci_hcd is now ready to be controlled through sysfs */
964 err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group);
965 if (err) {
966 uerr("create sysfs files\n");
967 return err;
968 }
969
970 return 0;
971}
972
973static void vhci_stop(struct usb_hcd *hcd)
974{
975 struct vhci_hcd *vhci = hcd_to_vhci(hcd);
976 int rhport = 0;
977
978 dbg_vhci_hc("stop VHCI controller\n");
979
980
981 /* 1. remove the userland interface of vhci_hcd */
982 sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group);
983
984 /* 2. shutdown all the ports of vhci_hcd */
985 for (rhport = 0 ; rhport < VHCI_NPORTS; rhport++) {
986 struct vhci_device *vdev = &vhci->vdev[rhport];
987
988 usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED);
989 usbip_stop_eh(&vdev->ud);
990 }
991
992
993 uinfo("vhci_stop done\n");
994}
995
996/*----------------------------------------------------------------------*/
997
998static int vhci_get_frame_number(struct usb_hcd *hcd)
999{
1000 uerr("Not yet implemented\n");
1001 return 0;
1002}
1003
1004
1005#ifdef CONFIG_PM
1006
1007/* FIXME: suspend/resume */
1008static int vhci_bus_suspend(struct usb_hcd *hcd)
1009{
1010 struct vhci_hcd *vhci = hcd_to_vhci(hcd);
1011
1012 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
1013
1014 spin_lock_irq(&vhci->lock);
1015 /* vhci->rh_state = DUMMY_RH_SUSPENDED;
1016 * set_link_state(vhci); */
1017 hcd->state = HC_STATE_SUSPENDED;
1018 spin_unlock_irq(&vhci->lock);
1019
1020 return 0;
1021}
1022
1023static int vhci_bus_resume(struct usb_hcd *hcd)
1024{
1025 struct vhci_hcd *vhci = hcd_to_vhci(hcd);
1026 int rc = 0;
1027
1028 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
1029
1030 spin_lock_irq(&vhci->lock);
1031 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
1032 rc = -ESHUTDOWN;
1033 } else {
1034 /* vhci->rh_state = DUMMY_RH_RUNNING;
1035 * set_link_state(vhci);
1036 * if (!list_empty(&vhci->urbp_list))
1037 * mod_timer(&vhci->timer, jiffies); */
1038 hcd->state = HC_STATE_RUNNING;
1039 }
1040 spin_unlock_irq(&vhci->lock);
1041 return rc;
1042
1043 return 0;
1044}
1045
1046#else
1047
1048#define vhci_bus_suspend NULL
1049#define vhci_bus_resume NULL
1050#endif
1051
1052
1053
1054static struct hc_driver vhci_hc_driver = {
1055 .description = driver_name,
1056 .product_desc = driver_desc,
1057 .hcd_priv_size = sizeof(struct vhci_hcd),
1058
1059 .flags = HCD_USB2,
1060
1061 .start = vhci_start,
1062 .stop = vhci_stop,
1063
1064 .urb_enqueue = vhci_urb_enqueue,
1065 .urb_dequeue = vhci_urb_dequeue,
1066
1067 .get_frame_number = vhci_get_frame_number,
1068
1069 .hub_status_data = vhci_hub_status,
1070 .hub_control = vhci_hub_control,
1071 .bus_suspend = vhci_bus_suspend,
1072 .bus_resume = vhci_bus_resume,
1073};
1074
1075static int vhci_hcd_probe(struct platform_device *pdev)
1076{
1077 struct usb_hcd *hcd;
1078 int ret;
1079
1080 uinfo("proving...\n");
1081
1082 dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id);
1083
1084 /* will be removed */
1085 if (pdev->dev.dma_mask) {
1086 dev_info(&pdev->dev, "vhci_hcd DMA not supported\n");
1087 return -EINVAL;
1088 }
1089
1090 /*
1091 * Allocate and initialize hcd.
1092 * Our private data is also allocated automatically.
1093 */
1094 hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, pdev->dev.bus_id);
1095 if (!hcd) {
1096 uerr("create hcd failed\n");
1097 return -ENOMEM;
1098 }
1099
1100
1101 /* this is private data for vhci_hcd */
1102 the_controller = hcd_to_vhci(hcd);
1103
1104 /*
1105 * Finish generic HCD structure initialization and register.
1106 * Call the driver's reset() and start() routines.
1107 */
1108 ret = usb_add_hcd(hcd, 0, 0);
1109 if (ret != 0) {
1110 uerr("usb_add_hcd failed %d\n", ret);
1111 usb_put_hcd(hcd);
1112 the_controller = NULL;
1113 return ret;
1114 }
1115
1116
1117 dbg_vhci_hc("bye\n");
1118 return 0;
1119}
1120
1121
1122static int vhci_hcd_remove(struct platform_device *pdev)
1123{
1124 struct usb_hcd *hcd;
1125
1126 hcd = platform_get_drvdata(pdev);
1127 if (!hcd)
1128 return 0;
1129
1130 /*
1131 * Disconnects the root hub,
1132 * then reverses the effects of usb_add_hcd(),
1133 * invoking the HCD's stop() methods.
1134 */
1135 usb_remove_hcd(hcd);
1136 usb_put_hcd(hcd);
1137 the_controller = NULL;
1138
1139
1140 return 0;
1141}
1142
1143
1144
1145#ifdef CONFIG_PM
1146
1147/* what should happen for USB/IP under suspend/resume? */
1148static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state)
1149{
1150 struct usb_hcd *hcd;
1151 int rhport = 0;
1152 int connected = 0;
1153 int ret = 0;
1154
1155 dev_dbg(&pdev->dev, "%s\n", __func__);
1156
1157 hcd = platform_get_drvdata(pdev);
1158
1159 spin_lock(&the_controller->lock);
1160
1161 for (rhport = 0; rhport < VHCI_NPORTS; rhport++)
1162 if (the_controller->port_status[rhport] &
1163 USB_PORT_STAT_CONNECTION)
1164 connected += 1;
1165
1166 spin_unlock(&the_controller->lock);
1167
1168 if (connected > 0) {
1169 uinfo("We have %d active connection%s. Do not suspend.\n",
1170 connected, (connected == 1 ? "" : "s"));
1171 ret = -EBUSY;
1172 } else {
1173 uinfo("suspend vhci_hcd");
1174 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1175 }
1176
1177 return ret;
1178}
1179
1180static int vhci_hcd_resume(struct platform_device *pdev)
1181{
1182 struct usb_hcd *hcd;
1183
1184 dev_dbg(&pdev->dev, "%s\n", __func__);
1185
1186 hcd = platform_get_drvdata(pdev);
1187 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1188 usb_hcd_poll_rh_status(hcd);
1189
1190 return 0;
1191}
1192
1193#else
1194
1195#define vhci_hcd_suspend NULL
1196#define vhci_hcd_resume NULL
1197
1198#endif
1199
1200
1201static struct platform_driver vhci_driver = {
1202 .probe = vhci_hcd_probe,
1203 .remove = __devexit_p(vhci_hcd_remove),
1204 .suspend = vhci_hcd_suspend,
1205 .resume = vhci_hcd_resume,
1206 .driver = {
1207 .name = (char *) driver_name,
1208 .owner = THIS_MODULE,
1209 },
1210};
1211
1212/*----------------------------------------------------------------------*/
1213
1214/*
1215 * The VHCI 'device' is 'virtual'; not a real plug&play hardware.
1216 * We need to add this virtual device as a platform device arbitrarily:
1217 * 1. platform_device_register()
1218 */
1219static void the_pdev_release(struct device *dev)
1220{
1221 return;
1222}
1223
1224static struct platform_device the_pdev = {
1225 /* should be the same name as driver_name */
1226 .name = (char *) driver_name,
1227 .id = -1,
1228 .dev = {
1229 /* .driver = &vhci_driver, */
1230 .release = the_pdev_release,
1231 },
1232};
1233
1234static int __init vhci_init(void)
1235{
1236 int ret;
1237
1238 dbg_vhci_hc("enter\n");
1239 if (usb_disabled())
1240 return -ENODEV;
1241
1242 printk(KERN_INFO KBUILD_MODNAME ": %s, %s\n", driver_name,
1243 DRIVER_VERSION);
1244
1245 ret = platform_driver_register(&vhci_driver);
1246 if (ret < 0)
1247 goto err_driver_register;
1248
1249 ret = platform_device_register(&the_pdev);
1250 if (ret < 0)
1251 goto err_platform_device_register;
1252
1253 dbg_vhci_hc("bye\n");
1254 return ret;
1255
1256 /* error occurred */
1257err_platform_device_register:
1258 platform_driver_unregister(&vhci_driver);
1259
1260err_driver_register:
1261 dbg_vhci_hc("bye\n");
1262 return ret;
1263}
1264module_init(vhci_init);
1265
1266static void __exit vhci_cleanup(void)
1267{
1268 dbg_vhci_hc("enter\n");
1269
1270 platform_device_unregister(&the_pdev);
1271 platform_driver_unregister(&vhci_driver);
1272
1273 dbg_vhci_hc("bye\n");
1274}
1275module_exit(vhci_cleanup);
diff --git a/drivers/staging/usbip/vhci_rx.c b/drivers/staging/usbip/vhci_rx.c
new file mode 100644
index 000000000000..933ccaf50afb
--- /dev/null
+++ b/drivers/staging/usbip/vhci_rx.c
@@ -0,0 +1,251 @@
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 "usbip_common.h"
21#include "vhci.h"
22
23
24/* get URB from transmitted urb queue */
25static struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev,
26 __u32 seqnum)
27{
28 struct vhci_priv *priv, *tmp;
29 struct urb *urb = NULL;
30 int status;
31
32 spin_lock(&vdev->priv_lock);
33
34 list_for_each_entry_safe(priv, tmp, &vdev->priv_rx, list) {
35 if (priv->seqnum == seqnum) {
36 urb = priv->urb;
37 status = urb->status;
38
39 dbg_vhci_rx("find urb %p vurb %p seqnum %u\n",
40 urb, priv, seqnum);
41
42 /* TODO: fix logic here to improve indent situtation */
43 if (status != -EINPROGRESS) {
44 if (status == -ENOENT ||
45 status == -ECONNRESET)
46 dev_info(&urb->dev->dev,
47 "urb %p was unlinked "
48 "%ssynchronuously.\n", urb,
49 status == -ENOENT ? "" : "a");
50 else
51 dev_info(&urb->dev->dev,
52 "urb %p may be in a error, "
53 "status %d\n", urb, status);
54 }
55
56 list_del(&priv->list);
57 kfree(priv);
58 urb->hcpriv = NULL;
59
60 break;
61 }
62 }
63
64 spin_unlock(&vdev->priv_lock);
65
66 return urb;
67}
68
69static void vhci_recv_ret_submit(struct vhci_device *vdev,
70 struct usbip_header *pdu)
71{
72 struct usbip_device *ud = &vdev->ud;
73 struct urb *urb;
74
75
76 urb = pickup_urb_and_free_priv(vdev, pdu->base.seqnum);
77
78
79 if (!urb) {
80 uerr("cannot find a urb of seqnum %u\n", pdu->base.seqnum);
81 uinfo("max seqnum %d\n", atomic_read(&the_controller->seqnum));
82 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
83 return;
84 }
85
86
87 /* unpack the pdu to a urb */
88 usbip_pack_pdu(pdu, urb, USBIP_RET_SUBMIT, 0);
89
90
91 /* recv transfer buffer */
92 if (usbip_recv_xbuff(ud, urb) < 0)
93 return;
94
95
96 /* recv iso_packet_descriptor */
97 if (usbip_recv_iso(ud, urb) < 0)
98 return;
99
100
101 if (dbg_flag_vhci_rx)
102 usbip_dump_urb(urb);
103
104
105 dbg_vhci_rx("now giveback urb %p\n", urb);
106
107 spin_lock(&the_controller->lock);
108 usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
109 spin_unlock(&the_controller->lock);
110
111 usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);
112
113
114 dbg_vhci_rx("Leave\n");
115
116 return;
117}
118
119
120static struct vhci_unlink *dequeue_pending_unlink(struct vhci_device *vdev,
121 struct usbip_header *pdu)
122{
123 struct vhci_unlink *unlink, *tmp;
124
125 spin_lock(&vdev->priv_lock);
126
127 list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) {
128 uinfo("unlink->seqnum %lu\n", unlink->seqnum);
129 if (unlink->seqnum == pdu->base.seqnum) {
130 dbg_vhci_rx("found pending unlink, %lu\n",
131 unlink->seqnum);
132 list_del(&unlink->list);
133
134 spin_unlock(&vdev->priv_lock);
135 return unlink;
136 }
137 }
138
139 spin_unlock(&vdev->priv_lock);
140
141 return NULL;
142}
143
144
145static void vhci_recv_ret_unlink(struct vhci_device *vdev,
146 struct usbip_header *pdu)
147{
148 struct vhci_unlink *unlink;
149 struct urb *urb;
150
151 usbip_dump_header(pdu);
152
153 unlink = dequeue_pending_unlink(vdev, pdu);
154 if (!unlink) {
155 uinfo("cannot find the pending unlink %u\n", pdu->base.seqnum);
156 return;
157 }
158
159 urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
160 if (!urb) {
161 /*
162 * I get the result of a unlink request. But, it seems that I
163 * already received the result of its submit result and gave
164 * back the URB.
165 */
166 uinfo("the urb (seqnum %d) was already given backed\n",
167 pdu->base.seqnum);
168 } else {
169 dbg_vhci_rx("now giveback urb %p\n", urb);
170
171 /* If unlink is succeed, status is -ECONNRESET */
172 urb->status = pdu->u.ret_unlink.status;
173 uinfo("%d\n", urb->status);
174
175 spin_lock(&the_controller->lock);
176 usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
177 spin_unlock(&the_controller->lock);
178
179 usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
180 urb->status);
181 }
182
183 kfree(unlink);
184
185 return;
186}
187
188/* recv a pdu */
189static void vhci_rx_pdu(struct usbip_device *ud)
190{
191 int ret;
192 struct usbip_header pdu;
193 struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
194
195
196 dbg_vhci_rx("Enter\n");
197
198 memset(&pdu, 0, sizeof(pdu));
199
200
201 /* 1. receive a pdu header */
202 ret = usbip_xmit(0, ud->tcp_socket, (char *) &pdu, sizeof(pdu), 0);
203 if (ret != sizeof(pdu)) {
204 uerr("receiving pdu failed! size is %d, should be %d\n",
205 ret, sizeof(pdu));
206 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
207 return;
208 }
209
210 usbip_header_correct_endian(&pdu, 0);
211
212 if (dbg_flag_vhci_rx)
213 usbip_dump_header(&pdu);
214
215 switch (pdu.base.command) {
216 case USBIP_RET_SUBMIT:
217 vhci_recv_ret_submit(vdev, &pdu);
218 break;
219 case USBIP_RET_UNLINK:
220 vhci_recv_ret_unlink(vdev, &pdu);
221 break;
222 default:
223 /* NOTREACHED */
224 uerr("unknown pdu %u\n", pdu.base.command);
225 usbip_dump_header(&pdu);
226 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
227 }
228}
229
230
231/*-------------------------------------------------------------------------*/
232
233void vhci_rx_loop(struct usbip_task *ut)
234{
235 struct usbip_device *ud = container_of(ut, struct usbip_device, tcp_rx);
236
237
238 while (1) {
239 if (signal_pending(current)) {
240 dbg_vhci_rx("signal catched!\n");
241 break;
242 }
243
244
245 if (usbip_event_happend(ud))
246 break;
247
248 vhci_rx_pdu(ud);
249 }
250}
251
diff --git a/drivers/staging/usbip/vhci_sysfs.c b/drivers/staging/usbip/vhci_sysfs.c
new file mode 100644
index 000000000000..24c2851a8f84
--- /dev/null
+++ b/drivers/staging/usbip/vhci_sysfs.c
@@ -0,0 +1,250 @@
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 "usbip_common.h"
21#include "vhci.h"
22
23#include <linux/in.h>
24
25/* TODO: refine locking ?*/
26
27/* Sysfs entry to show port status */
28static ssize_t show_status(struct device *dev, struct device_attribute *attr,
29 char *out)
30{
31 char *s = out;
32 int i = 0;
33
34 if (!the_controller || !out)
35 BUG();
36
37 spin_lock(&the_controller->lock);
38
39 /*
40 * output example:
41 * prt sta spd dev socket local_busid
42 * 000 004 000 000 c5a7bb80 1-2.3
43 * 001 004 000 000 d8cee980 2-3.4
44 *
45 * IP address can be retrieved from a socket pointer address by looking
46 * up /proc/net/{tcp,tcp6}. Also, a userland program may remember a
47 * port number and its peer IP address.
48 */
49 out += sprintf(out, "prt sta spd bus dev socket "
50 "local_busid\n");
51
52 for (i = 0; i < VHCI_NPORTS; i++) {
53 struct vhci_device *vdev = port_to_vdev(i);
54
55 spin_lock(&vdev->ud.lock);
56
57 out += sprintf(out, "%03u %03u ", i, vdev->ud.status);
58
59 if (vdev->ud.status == VDEV_ST_USED) {
60 out += sprintf(out, "%03u %08x ",
61 vdev->speed, vdev->devid);
62 out += sprintf(out, "%16p ", vdev->ud.tcp_socket);
63 out += sprintf(out, "%s", vdev->udev->dev.bus_id);
64
65 } else
66 out += sprintf(out, "000 000 000 0000000000000000 0-0");
67
68 out += sprintf(out, "\n");
69
70 spin_unlock(&vdev->ud.lock);
71 }
72
73 spin_unlock(&the_controller->lock);
74
75 return out - s;
76}
77static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
78
79/* Sysfs entry to shutdown a virtual connection */
80static int vhci_port_disconnect(__u32 rhport)
81{
82 struct vhci_device *vdev;
83
84 dbg_vhci_sysfs("enter\n");
85
86 /* lock */
87 spin_lock(&the_controller->lock);
88
89 vdev = port_to_vdev(rhport);
90
91 spin_lock(&vdev->ud.lock);
92 if (vdev->ud.status == VDEV_ST_NULL) {
93 uerr("not connected %d\n", vdev->ud.status);
94
95 /* unlock */
96 spin_unlock(&vdev->ud.lock);
97 spin_unlock(&the_controller->lock);
98
99 return -EINVAL;
100 }
101
102 /* unlock */
103 spin_unlock(&vdev->ud.lock);
104 spin_unlock(&the_controller->lock);
105
106 usbip_event_add(&vdev->ud, VDEV_EVENT_DOWN);
107
108 return 0;
109}
110
111static ssize_t store_detach(struct device *dev, struct device_attribute *attr,
112 const char *buf, size_t count)
113{
114 int err;
115 __u32 rhport = 0;
116
117 sscanf(buf, "%u", &rhport);
118
119 /* check rhport */
120 if (rhport >= VHCI_NPORTS) {
121 uerr("invalid port %u\n", rhport);
122 return -EINVAL;
123 }
124
125 err = vhci_port_disconnect(rhport);
126 if (err < 0)
127 return -EINVAL;
128
129 dbg_vhci_sysfs("Leave\n");
130 return count;
131}
132static DEVICE_ATTR(detach, S_IWUSR, NULL, store_detach);
133
134/* Sysfs entry to establish a virtual connection */
135static int valid_args(__u32 rhport, enum usb_device_speed speed)
136{
137 /* check rhport */
138 if ((rhport < 0) || (rhport >= VHCI_NPORTS)) {
139 uerr("port %u\n", rhport);
140 return -EINVAL;
141 }
142
143 /* check speed */
144 switch (speed) {
145 case USB_SPEED_LOW:
146 case USB_SPEED_FULL:
147 case USB_SPEED_HIGH:
148 case USB_SPEED_VARIABLE:
149 break;
150 default:
151 uerr("speed %d\n", speed);
152 return -EINVAL;
153 }
154
155 return 0;
156}
157
158/*
159 * To start a new USB/IP attachment, a userland program needs to setup a TCP
160 * connection and then write its socket descriptor with remote device
161 * information into this sysfs file.
162 *
163 * A remote device is virtually attached to the root-hub port of @rhport with
164 * @speed. @devid is embedded into a request to specify the remote device in a
165 * server host.
166 *
167 * write() returns 0 on success, else negative errno.
168 */
169static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
170 const char *buf, size_t count)
171{
172 struct vhci_device *vdev;
173 struct socket *socket;
174 int sockfd = 0;
175 __u32 rhport = 0, devid = 0, speed = 0;
176
177 /*
178 * @rhport: port number of vhci_hcd
179 * @sockfd: socket descriptor of an established TCP connection
180 * @devid: unique device identifier in a remote host
181 * @speed: usb device speed in a remote host
182 */
183 sscanf(buf, "%u %u %u %u", &rhport, &sockfd, &devid, &speed);
184
185 dbg_vhci_sysfs("rhport(%u) sockfd(%u) devid(%u) speed(%u)\n",
186 rhport, sockfd, devid, speed);
187
188
189 /* check received parameters */
190 if (valid_args(rhport, speed) < 0)
191 return -EINVAL;
192
193 /* check sockfd */
194 socket = sockfd_to_socket(sockfd);
195 if (!socket)
196 return -EINVAL;
197
198 /* now need lock until setting vdev status as used */
199
200 /* begin a lock */
201 spin_lock(&the_controller->lock);
202
203 vdev = port_to_vdev(rhport);
204
205 spin_lock(&vdev->ud.lock);
206
207 if (vdev->ud.status != VDEV_ST_NULL) {
208 /* end of the lock */
209 spin_unlock(&vdev->ud.lock);
210 spin_unlock(&the_controller->lock);
211
212 uerr("port %d already used\n", rhport);
213 return -EINVAL;
214 }
215
216 uinfo("rhport(%u) sockfd(%d) devid(%u) speed(%u)\n",
217 rhport, sockfd, devid, speed);
218
219 vdev->devid = devid;
220 vdev->speed = speed;
221 vdev->ud.tcp_socket = socket;
222 vdev->ud.status = VDEV_ST_NOTASSIGNED;
223
224 spin_unlock(&vdev->ud.lock);
225 spin_unlock(&the_controller->lock);
226 /* end the lock */
227
228 /*
229 * this function will sleep, so should be out of the lock. but, it's ok
230 * because we already marked vdev as being used. really?
231 */
232 usbip_start_threads(&vdev->ud);
233
234 rh_port_connect(rhport, speed);
235
236 return count;
237}
238static DEVICE_ATTR(attach, S_IWUSR, NULL, store_attach);
239
240static struct attribute *dev_attrs[] = {
241 &dev_attr_status.attr,
242 &dev_attr_detach.attr,
243 &dev_attr_attach.attr,
244 &dev_attr_usbip_debug.attr,
245 NULL,
246};
247
248struct attribute_group dev_attr_group = {
249 .attrs = dev_attrs,
250};
diff --git a/drivers/staging/usbip/vhci_tx.c b/drivers/staging/usbip/vhci_tx.c
new file mode 100644
index 000000000000..1f552a95f486
--- /dev/null
+++ b/drivers/staging/usbip/vhci_tx.c
@@ -0,0 +1,239 @@
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 "usbip_common.h"
21#include "vhci.h"
22
23
24static void setup_cmd_submit_pdu(struct usbip_header *pdup, struct urb *urb)
25{
26 struct vhci_priv *priv = ((struct vhci_priv *)urb->hcpriv);
27 struct vhci_device *vdev = priv->vdev;
28
29 dbg_vhci_tx("URB, local devnum %u, remote devid %u\n",
30 usb_pipedevice(urb->pipe), vdev->devid);
31
32 pdup->base.command = USBIP_CMD_SUBMIT;
33 pdup->base.seqnum = priv->seqnum;
34 pdup->base.devid = vdev->devid;
35 if (usb_pipein(urb->pipe))
36 pdup->base.direction = USBIP_DIR_IN;
37 else
38 pdup->base.direction = USBIP_DIR_OUT;
39 pdup->base.ep = usb_pipeendpoint(urb->pipe);
40
41 usbip_pack_pdu(pdup, urb, USBIP_CMD_SUBMIT, 1);
42
43 if (urb->setup_packet)
44 memcpy(pdup->u.cmd_submit.setup, urb->setup_packet, 8);
45}
46
47static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev)
48{
49 unsigned long flags;
50 struct vhci_priv *priv, *tmp;
51
52 spin_lock_irqsave(&vdev->priv_lock, flags);
53
54 list_for_each_entry_safe(priv, tmp, &vdev->priv_tx, list) {
55 list_move_tail(&priv->list, &vdev->priv_rx);
56 spin_unlock_irqrestore(&vdev->priv_lock, flags);
57 return priv;
58 }
59
60 spin_unlock_irqrestore(&vdev->priv_lock, flags);
61
62 return NULL;
63}
64
65
66
67static int vhci_send_cmd_submit(struct vhci_device *vdev)
68{
69 struct vhci_priv *priv = NULL;
70
71 struct msghdr msg;
72 struct kvec iov[3];
73 size_t txsize;
74
75 size_t total_size = 0;
76
77 while ((priv = dequeue_from_priv_tx(vdev)) != NULL) {
78 int ret;
79 struct urb *urb = priv->urb;
80 struct usbip_header pdu_header;
81 void *iso_buffer = NULL;
82
83 txsize = 0;
84 memset(&pdu_header, 0, sizeof(pdu_header));
85 memset(&msg, 0, sizeof(msg));
86 memset(&iov, 0, sizeof(iov));
87
88 dbg_vhci_tx("setup txdata urb %p\n", urb);
89
90
91 /* 1. setup usbip_header */
92 setup_cmd_submit_pdu(&pdu_header, urb);
93 usbip_header_correct_endian(&pdu_header, 1);
94
95 iov[0].iov_base = &pdu_header;
96 iov[0].iov_len = sizeof(pdu_header);
97 txsize += sizeof(pdu_header);
98
99 /* 2. setup transfer buffer */
100 if (!usb_pipein(urb->pipe) && urb->transfer_buffer_length > 0) {
101 iov[1].iov_base = urb->transfer_buffer;
102 iov[1].iov_len = urb->transfer_buffer_length;
103 txsize += urb->transfer_buffer_length;
104 }
105
106 /* 3. setup iso_packet_descriptor */
107 if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
108 ssize_t len = 0;
109
110 iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
111 if (!iso_buffer) {
112 usbip_event_add(&vdev->ud,
113 SDEV_EVENT_ERROR_MALLOC);
114 return -1;
115 }
116
117 iov[2].iov_base = iso_buffer;
118 iov[2].iov_len = len;
119 txsize += len;
120 }
121
122 ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 3, txsize);
123 if (ret != txsize) {
124 uerr("sendmsg failed!, retval %d for %zd\n", ret,
125 txsize);
126 kfree(iso_buffer);
127 usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
128 return -1;
129 }
130
131 kfree(iso_buffer);
132 dbg_vhci_tx("send txdata\n");
133
134 total_size += txsize;
135 }
136
137 return total_size;
138}
139
140
141/*-------------------------------------------------------------------------*/
142
143static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev)
144{
145 unsigned long flags;
146 struct vhci_unlink *unlink, *tmp;
147
148 spin_lock_irqsave(&vdev->priv_lock, flags);
149
150 list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
151 list_move_tail(&unlink->list, &vdev->unlink_rx);
152 spin_unlock_irqrestore(&vdev->priv_lock, flags);
153 return unlink;
154 }
155
156 spin_unlock_irqrestore(&vdev->priv_lock, flags);
157
158 return NULL;
159}
160
161static int vhci_send_cmd_unlink(struct vhci_device *vdev)
162{
163 struct vhci_unlink *unlink = NULL;
164
165 struct msghdr msg;
166 struct kvec iov[3];
167 size_t txsize;
168
169 size_t total_size = 0;
170
171 while ((unlink = dequeue_from_unlink_tx(vdev)) != NULL) {
172 int ret;
173 struct usbip_header pdu_header;
174
175 txsize = 0;
176 memset(&pdu_header, 0, sizeof(pdu_header));
177 memset(&msg, 0, sizeof(msg));
178 memset(&iov, 0, sizeof(iov));
179
180 dbg_vhci_tx("setup cmd unlink, %lu \n", unlink->seqnum);
181
182
183 /* 1. setup usbip_header */
184 pdu_header.base.command = USBIP_CMD_UNLINK;
185 pdu_header.base.seqnum = unlink->seqnum;
186 pdu_header.base.devid = vdev->devid;
187 pdu_header.base.ep = 0;
188 pdu_header.u.cmd_unlink.seqnum = unlink->unlink_seqnum;
189
190 usbip_header_correct_endian(&pdu_header, 1);
191
192 iov[0].iov_base = &pdu_header;
193 iov[0].iov_len = sizeof(pdu_header);
194 txsize += sizeof(pdu_header);
195
196 ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 1, txsize);
197 if (ret != txsize) {
198 uerr("sendmsg failed!, retval %d for %zd\n", ret,
199 txsize);
200 usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
201 return -1;
202 }
203
204
205 dbg_vhci_tx("send txdata\n");
206
207 total_size += txsize;
208 }
209
210 return total_size;
211}
212
213
214/*-------------------------------------------------------------------------*/
215
216void vhci_tx_loop(struct usbip_task *ut)
217{
218 struct usbip_device *ud = container_of(ut, struct usbip_device, tcp_tx);
219 struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
220
221 while (1) {
222 if (signal_pending(current)) {
223 uinfo("vhci_tx signal catched\n");
224 break;
225 }
226
227 if (vhci_send_cmd_submit(vdev) < 0)
228 break;
229
230 if (vhci_send_cmd_unlink(vdev) < 0)
231 break;
232
233 wait_event_interruptible(vdev->waitq_tx,
234 (!list_empty(&vdev->priv_tx) ||
235 !list_empty(&vdev->unlink_tx)));
236
237 dbg_vhci_tx("pending urbs ?, now wake up\n");
238 }
239}
generated by cgit v1.2.2 (git 2.25.0) at 2026-04-06 17:15:37 -0400