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Commit | Line | Data |
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2cb7cef9 BS |
1 | From 04679b3489e048cd5dae79e050a3afed8e4e42b6 Mon Sep 17 00:00:00 2001 |
2 | From: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net> | |
3 | Date: Wed, 9 Jul 2008 14:56:51 -0600 | |
4 | Subject: [PATCH 12/23] Staging: USB/IP: add client driver | |
5 | Patch-mainline: 2.6.28 | |
6 | ||
7 | This adds the USB IP client driver | |
8 | ||
9 | Brian Merrell cleaned up a lot of this code and submitted it for | |
10 | inclusion. Greg also did a lot of cleanup. | |
11 | ||
12 | Signed-off-by: Brian G. Merrell <bgmerrell@novell.com> | |
13 | Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net> | |
14 | Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> | |
15 | --- | |
16 | drivers/staging/usbip/Kconfig | 11 + | |
17 | drivers/staging/usbip/Makefile | 3 + | |
18 | drivers/staging/usbip/vhci.h | 142 ++++ | |
19 | drivers/staging/usbip/vhci_hcd.c | 1275 ++++++++++++++++++++++++++++++++++++ | |
20 | drivers/staging/usbip/vhci_rx.c | 251 +++++++ | |
21 | drivers/staging/usbip/vhci_sysfs.c | 250 +++++++ | |
22 | drivers/staging/usbip/vhci_tx.c | 239 +++++++ | |
23 | 7 files changed, 2171 insertions(+), 0 deletions(-) | |
24 | create mode 100644 drivers/staging/usbip/vhci.h | |
25 | create mode 100644 drivers/staging/usbip/vhci_hcd.c | |
26 | create mode 100644 drivers/staging/usbip/vhci_rx.c | |
27 | create mode 100644 drivers/staging/usbip/vhci_sysfs.c | |
28 | create mode 100644 drivers/staging/usbip/vhci_tx.c | |
29 | ||
30 | diff --git a/drivers/staging/usbip/Kconfig b/drivers/staging/usbip/Kconfig | |
31 | index 37efb5e..c4d68e1 100644 | |
32 | --- a/drivers/staging/usbip/Kconfig | |
33 | +++ b/drivers/staging/usbip/Kconfig | |
34 | @@ -12,3 +12,14 @@ config USB_IP_COMMON | |
35 | module will be called usbip_common_mod. | |
36 | ||
37 | If unsure, say N. | |
38 | + | |
39 | +config USB_IP_VHCI_HCD | |
40 | + tristate "USB IP client driver" | |
41 | + depends on USB_IP_COMMON | |
42 | + default N | |
43 | + ---help--- | |
44 | + This enables the USB IP host controller driver which will | |
45 | + run on the client machine. | |
46 | + | |
47 | + To compile this driver as a module, choose M here: the | |
48 | + module will be called vhci_hcd. | |
49 | diff --git a/drivers/staging/usbip/Makefile b/drivers/staging/usbip/Makefile | |
50 | index ce925ca..6ef4c39 100644 | |
51 | --- a/drivers/staging/usbip/Makefile | |
52 | +++ b/drivers/staging/usbip/Makefile | |
53 | @@ -1,6 +1,9 @@ | |
54 | obj-$(CONFIG_USB_IP_COMMON) += usbip_common_mod.o | |
55 | usbip_common_mod-objs := usbip_common.o usbip_event.o | |
56 | ||
57 | +obj-$(CONFIG_USB_IP_VHCI_HCD) += vhci-hcd.o | |
58 | +vhci-hcd-objs := vhci_sysfs.o vhci_tx.o vhci_rx.o vhci_hcd.o | |
59 | + | |
60 | ifeq ($(CONFIG_USB_DEBUG),y) | |
61 | EXTRA_CFLAGS += -DDEBUG | |
62 | endif | |
63 | diff --git a/drivers/staging/usbip/vhci.h b/drivers/staging/usbip/vhci.h | |
64 | new file mode 100644 | |
65 | index 0000000..5e37517 | |
66 | --- /dev/null | |
67 | +++ b/drivers/staging/usbip/vhci.h | |
68 | @@ -0,0 +1,142 @@ | |
69 | +/* | |
70 | + * Copyright (C) 2003-2008 Takahiro Hirofuchi | |
71 | + * | |
72 | + * This is free software; you can redistribute it and/or modify | |
73 | + * it under the terms of the GNU General Public License as published by | |
74 | + * the Free Software Foundation; either version 2 of the License, or | |
75 | + * (at your option) any later version. | |
76 | + * | |
77 | + * This is distributed in the hope that it will be useful, | |
78 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
79 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
80 | + * GNU General Public License for more details. | |
81 | + * | |
82 | + * You should have received a copy of the GNU General Public License | |
83 | + * along with this program; if not, write to the Free Software | |
84 | + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
85 | + * USA. | |
86 | + */ | |
87 | + | |
88 | +#include <linux/platform_device.h> | |
89 | +#include "../../usb/core/hcd.h" | |
90 | + | |
91 | + | |
92 | +struct vhci_device { | |
93 | + struct usb_device *udev; | |
94 | + | |
95 | + /* | |
96 | + * devid specifies a remote usb device uniquely instead | |
97 | + * of combination of busnum and devnum. | |
98 | + */ | |
99 | + __u32 devid; | |
100 | + | |
101 | + /* speed of a remote device */ | |
102 | + enum usb_device_speed speed; | |
103 | + | |
104 | + /* vhci root-hub port to which this device is attached */ | |
105 | + __u32 rhport; | |
106 | + | |
107 | + struct usbip_device ud; | |
108 | + | |
109 | + | |
110 | + /* lock for the below link lists */ | |
111 | + spinlock_t priv_lock; | |
112 | + | |
113 | + /* vhci_priv is linked to one of them. */ | |
114 | + struct list_head priv_tx; | |
115 | + struct list_head priv_rx; | |
116 | + | |
117 | + /* vhci_unlink is linked to one of them */ | |
118 | + struct list_head unlink_tx; | |
119 | + struct list_head unlink_rx; | |
120 | + | |
121 | + /* vhci_tx thread sleeps for this queue */ | |
122 | + wait_queue_head_t waitq_tx; | |
123 | +}; | |
124 | + | |
125 | + | |
126 | +/* urb->hcpriv, use container_of() */ | |
127 | +struct vhci_priv { | |
128 | + unsigned long seqnum; | |
129 | + struct list_head list; | |
130 | + | |
131 | + struct vhci_device *vdev; | |
132 | + struct urb *urb; | |
133 | +}; | |
134 | + | |
135 | + | |
136 | +struct vhci_unlink { | |
137 | + /* seqnum of this request */ | |
138 | + unsigned long seqnum; | |
139 | + | |
140 | + struct list_head list; | |
141 | + | |
142 | + /* seqnum of the unlink target */ | |
143 | + unsigned long unlink_seqnum; | |
144 | +}; | |
145 | + | |
146 | +/* | |
147 | + * The number of ports is less than 16 ? | |
148 | + * USB_MAXCHILDREN is statically defined to 16 in usb.h. Its maximum value | |
149 | + * would be 31 because the event_bits[1] of struct usb_hub is defined as | |
150 | + * unsigned long in hub.h | |
151 | + */ | |
152 | +#define VHCI_NPORTS 8 | |
153 | + | |
154 | +/* for usb_bus.hcpriv */ | |
155 | +struct vhci_hcd { | |
156 | + spinlock_t lock; | |
157 | + | |
158 | + u32 port_status[VHCI_NPORTS]; | |
159 | + | |
160 | + unsigned resuming:1; | |
161 | + unsigned long re_timeout; | |
162 | + | |
163 | + atomic_t seqnum; | |
164 | + | |
165 | + /* | |
166 | + * NOTE: | |
167 | + * wIndex shows the port number and begins from 1. | |
168 | + * But, the index of this array begins from 0. | |
169 | + */ | |
170 | + struct vhci_device vdev[VHCI_NPORTS]; | |
171 | + | |
172 | + /* vhci_device which has not been assiged its address yet */ | |
173 | + int pending_port; | |
174 | +}; | |
175 | + | |
176 | + | |
177 | +extern struct vhci_hcd *the_controller; | |
178 | +extern struct attribute_group dev_attr_group; | |
179 | + | |
180 | + | |
181 | +/*-------------------------------------------------------------------------*/ | |
182 | +/* prototype declaration */ | |
183 | + | |
184 | +/* vhci_hcd.c */ | |
185 | +void rh_port_connect(int rhport, enum usb_device_speed speed); | |
186 | +void rh_port_disconnect(int rhport); | |
187 | +void vhci_rx_loop(struct usbip_task *ut); | |
188 | +void vhci_tx_loop(struct usbip_task *ut); | |
189 | + | |
190 | +#define hardware (&the_controller->pdev.dev) | |
191 | + | |
192 | +static inline struct vhci_device *port_to_vdev(__u32 port) | |
193 | +{ | |
194 | + return &the_controller->vdev[port]; | |
195 | +} | |
196 | + | |
197 | +static inline struct vhci_hcd *hcd_to_vhci(struct usb_hcd *hcd) | |
198 | +{ | |
199 | + return (struct vhci_hcd *) (hcd->hcd_priv); | |
200 | +} | |
201 | + | |
202 | +static inline struct usb_hcd *vhci_to_hcd(struct vhci_hcd *vhci) | |
203 | +{ | |
204 | + return container_of((void *) vhci, struct usb_hcd, hcd_priv); | |
205 | +} | |
206 | + | |
207 | +static inline struct device *vhci_dev(struct vhci_hcd *vhci) | |
208 | +{ | |
209 | + return vhci_to_hcd(vhci)->self.controller; | |
210 | +} | |
211 | diff --git a/drivers/staging/usbip/vhci_hcd.c b/drivers/staging/usbip/vhci_hcd.c | |
212 | new file mode 100644 | |
213 | index 0000000..5b5a2e3 | |
214 | --- /dev/null | |
215 | +++ b/drivers/staging/usbip/vhci_hcd.c | |
216 | @@ -0,0 +1,1275 @@ | |
217 | +/* | |
218 | + * Copyright (C) 2003-2008 Takahiro Hirofuchi | |
219 | + * | |
220 | + * This is free software; you can redistribute it and/or modify | |
221 | + * it under the terms of the GNU General Public License as published by | |
222 | + * the Free Software Foundation; either version 2 of the License, or | |
223 | + * (at your option) any later version. | |
224 | + * | |
225 | + * This is distributed in the hope that it will be useful, | |
226 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
227 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
228 | + * GNU General Public License for more details. | |
229 | + * | |
230 | + * You should have received a copy of the GNU General Public License | |
231 | + * along with this program; if not, write to the Free Software | |
232 | + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
233 | + * USA. | |
234 | + */ | |
235 | + | |
236 | + | |
237 | +#include "usbip_common.h" | |
238 | +#include "vhci.h" | |
239 | + | |
240 | +#define DRIVER_VERSION "1.0" | |
241 | +#define DRIVER_AUTHOR "Takahiro Hirofuchi" | |
242 | +#define DRIVER_DESC "Virtual Host Controller Interface Driver for USB/IP" | |
243 | +#define DRIVER_LICENCE "GPL" | |
244 | +MODULE_AUTHOR(DRIVER_AUTHOR); | |
245 | +MODULE_DESCRIPTION(DRIVER_DESC); | |
246 | +MODULE_LICENSE(DRIVER_LICENCE); | |
247 | + | |
248 | + | |
249 | + | |
250 | +/* | |
251 | + * TODO | |
252 | + * - update root hub emulation | |
253 | + * - move the emulation code to userland ? | |
254 | + * porting to other operating systems | |
255 | + * minimize kernel code | |
256 | + * - add suspend/resume code | |
257 | + * - clean up everything | |
258 | + */ | |
259 | + | |
260 | + | |
261 | +/* See usb gadget dummy hcd */ | |
262 | + | |
263 | + | |
264 | +static int vhci_hub_status(struct usb_hcd *hcd, char *buff); | |
265 | +static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
266 | + u16 wIndex, char *buff, u16 wLength); | |
267 | +static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
268 | + gfp_t mem_flags); | |
269 | +static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); | |
270 | +static int vhci_start(struct usb_hcd *vhci_hcd); | |
271 | +static void vhci_stop(struct usb_hcd *hcd); | |
272 | +static int vhci_get_frame_number(struct usb_hcd *hcd); | |
273 | + | |
274 | +static const char driver_name[] = "vhci_hcd"; | |
275 | +static const char driver_desc[] = "USB/IP Virtual Host Contoroller"; | |
276 | + | |
277 | +struct vhci_hcd *the_controller; | |
278 | + | |
279 | +static const char *bit_desc[] = { | |
280 | + "CONNECTION", /*0*/ | |
281 | + "ENABLE", /*1*/ | |
282 | + "SUSPEND", /*2*/ | |
283 | + "OVER_CURRENT", /*3*/ | |
284 | + "RESET", /*4*/ | |
285 | + "R5", /*5*/ | |
286 | + "R6", /*6*/ | |
287 | + "R7", /*7*/ | |
288 | + "POWER", /*8*/ | |
289 | + "LOWSPEED", /*9*/ | |
290 | + "HIGHSPEED", /*10*/ | |
291 | + "PORT_TEST", /*11*/ | |
292 | + "INDICATOR", /*12*/ | |
293 | + "R13", /*13*/ | |
294 | + "R14", /*14*/ | |
295 | + "R15", /*15*/ | |
296 | + "C_CONNECTION", /*16*/ | |
297 | + "C_ENABLE", /*17*/ | |
298 | + "C_SUSPEND", /*18*/ | |
299 | + "C_OVER_CURRENT", /*19*/ | |
300 | + "C_RESET", /*20*/ | |
301 | + "R21", /*21*/ | |
302 | + "R22", /*22*/ | |
303 | + "R23", /*23*/ | |
304 | + "R24", /*24*/ | |
305 | + "R25", /*25*/ | |
306 | + "R26", /*26*/ | |
307 | + "R27", /*27*/ | |
308 | + "R28", /*28*/ | |
309 | + "R29", /*29*/ | |
310 | + "R30", /*30*/ | |
311 | + "R31", /*31*/ | |
312 | +}; | |
313 | + | |
314 | + | |
315 | +static void dump_port_status(u32 status) | |
316 | +{ | |
317 | + int i = 0; | |
318 | + | |
319 | + printk(KERN_DEBUG "status %08x:", status); | |
320 | + for (i = 0; i < 32; i++) { | |
321 | + if (status & (1 << i)) | |
322 | + printk(" %s", bit_desc[i]); | |
323 | + } | |
324 | + | |
325 | + printk("\n"); | |
326 | +} | |
327 | + | |
328 | + | |
329 | + | |
330 | +void rh_port_connect(int rhport, enum usb_device_speed speed) | |
331 | +{ | |
332 | + unsigned long flags; | |
333 | + | |
334 | + dbg_vhci_rh("rh_port_connect %d\n", rhport); | |
335 | + | |
336 | + spin_lock_irqsave(&the_controller->lock, flags); | |
337 | + | |
338 | + the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION | |
339 | + | (1 << USB_PORT_FEAT_C_CONNECTION); | |
340 | + | |
341 | + switch (speed) { | |
342 | + case USB_SPEED_HIGH: | |
343 | + the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED; | |
344 | + break; | |
345 | + case USB_SPEED_LOW: | |
346 | + the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED; | |
347 | + break; | |
348 | + default: | |
349 | + break; | |
350 | + } | |
351 | + | |
352 | + /* spin_lock(&the_controller->vdev[rhport].ud.lock); | |
353 | + * the_controller->vdev[rhport].ud.status = VDEV_CONNECT; | |
354 | + * spin_unlock(&the_controller->vdev[rhport].ud.lock); */ | |
355 | + | |
356 | + the_controller->pending_port = rhport; | |
357 | + | |
358 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
359 | + | |
360 | + usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); | |
361 | +} | |
362 | + | |
363 | +void rh_port_disconnect(int rhport) | |
364 | +{ | |
365 | + unsigned long flags; | |
366 | + | |
367 | + dbg_vhci_rh("rh_port_disconnect %d\n", rhport); | |
368 | + | |
369 | + spin_lock_irqsave(&the_controller->lock, flags); | |
370 | + /* stop_activity(dum, driver); */ | |
371 | + the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION; | |
372 | + the_controller->port_status[rhport] |= | |
373 | + (1 << USB_PORT_FEAT_C_CONNECTION); | |
374 | + | |
375 | + | |
376 | + /* not yet complete the disconnection | |
377 | + * spin_lock(&vdev->ud.lock); | |
378 | + * vdev->ud.status = VHC_ST_DISCONNECT; | |
379 | + * spin_unlock(&vdev->ud.lock); */ | |
380 | + | |
381 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
382 | +} | |
383 | + | |
384 | + | |
385 | + | |
386 | +/*----------------------------------------------------------------------*/ | |
387 | + | |
388 | +#define PORT_C_MASK \ | |
389 | + ((USB_PORT_STAT_C_CONNECTION \ | |
390 | + | USB_PORT_STAT_C_ENABLE \ | |
391 | + | USB_PORT_STAT_C_SUSPEND \ | |
392 | + | USB_PORT_STAT_C_OVERCURRENT \ | |
393 | + | USB_PORT_STAT_C_RESET) << 16) | |
394 | + | |
395 | +/* | |
396 | + * This function is almostly the same as dummy_hcd.c:dummy_hub_status() without | |
397 | + * suspend/resume support. But, it is modified to provide multiple ports. | |
398 | + * | |
399 | + * @buf: a bitmap to show which port status has been changed. | |
400 | + * bit 0: reserved or used for another purpose? | |
401 | + * bit 1: the status of port 0 has been changed. | |
402 | + * bit 2: the status of port 1 has been changed. | |
403 | + * ... | |
404 | + * bit 7: the status of port 6 has been changed. | |
405 | + * bit 8: the status of port 7 has been changed. | |
406 | + * ... | |
407 | + * bit 15: the status of port 14 has been changed. | |
408 | + * | |
409 | + * So, the maximum number of ports is 31 ( port 0 to port 30) ? | |
410 | + * | |
411 | + * The return value is the actual transfered length in byte. If nothing has | |
412 | + * been changed, return 0. In the case that the number of ports is less than or | |
413 | + * equal to 6 (VHCI_NPORTS==7), return 1. | |
414 | + * | |
415 | + */ | |
416 | +static int vhci_hub_status(struct usb_hcd *hcd, char *buf) | |
417 | +{ | |
418 | + struct vhci_hcd *vhci; | |
419 | + unsigned long flags; | |
420 | + int retval = 0; | |
421 | + | |
422 | + /* the enough buffer is allocated according to USB_MAXCHILDREN */ | |
423 | + unsigned long *event_bits = (unsigned long *) buf; | |
424 | + int rhport; | |
425 | + int changed = 0; | |
426 | + | |
427 | + | |
428 | + *event_bits = 0; | |
429 | + | |
430 | + vhci = hcd_to_vhci(hcd); | |
431 | + | |
432 | + spin_lock_irqsave(&vhci->lock, flags); | |
433 | + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { | |
434 | + dbg_vhci_rh("hw accessible flag in on?\n"); | |
435 | + goto done; | |
436 | + } | |
437 | + | |
438 | + /* check pseudo status register for each port */ | |
439 | + for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { | |
440 | + if ((vhci->port_status[rhport] & PORT_C_MASK)) { | |
441 | + /* The status of a port has been changed, */ | |
442 | + dbg_vhci_rh("port %d is changed\n", rhport); | |
443 | + | |
444 | + *event_bits |= 1 << (rhport + 1); | |
445 | + changed = 1; | |
446 | + } | |
447 | + } | |
448 | + | |
449 | + uinfo("changed %d\n", changed); | |
450 | + | |
451 | + if (hcd->state == HC_STATE_SUSPENDED) | |
452 | + usb_hcd_resume_root_hub(hcd); | |
453 | + | |
454 | + if (changed) | |
455 | + retval = 1 + (VHCI_NPORTS / 8); | |
456 | + else | |
457 | + retval = 0; | |
458 | + | |
459 | +done: | |
460 | + spin_unlock_irqrestore(&vhci->lock, flags); | |
461 | + return retval; | |
462 | +} | |
463 | + | |
464 | +/* See hub_configure in hub.c */ | |
465 | +static inline void hub_descriptor(struct usb_hub_descriptor *desc) | |
466 | +{ | |
467 | + memset(desc, 0, sizeof(*desc)); | |
468 | + desc->bDescriptorType = 0x29; | |
469 | + desc->bDescLength = 9; | |
470 | + desc->wHubCharacteristics = (__force __u16) | |
471 | + (__constant_cpu_to_le16(0x0001)); | |
472 | + desc->bNbrPorts = VHCI_NPORTS; | |
473 | + desc->bitmap[0] = 0xff; | |
474 | + desc->bitmap[1] = 0xff; | |
475 | +} | |
476 | + | |
477 | +static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
478 | + u16 wIndex, char *buf, u16 wLength) | |
479 | +{ | |
480 | + struct vhci_hcd *dum; | |
481 | + int retval = 0; | |
482 | + unsigned long flags; | |
483 | + int rhport; | |
484 | + | |
485 | + u32 prev_port_status[VHCI_NPORTS]; | |
486 | + | |
487 | + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) | |
488 | + return -ETIMEDOUT; | |
489 | + | |
490 | + /* | |
491 | + * NOTE: | |
492 | + * wIndex shows the port number and begins from 1. | |
493 | + */ | |
494 | + dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue, | |
495 | + wIndex); | |
496 | + if (wIndex > VHCI_NPORTS) | |
497 | + printk(KERN_ERR "%s: invalid port number %d\n", __func__, wIndex); | |
498 | + rhport = ((__u8)(wIndex & 0x00ff)) - 1; | |
499 | + | |
500 | + dum = hcd_to_vhci(hcd); | |
501 | + | |
502 | + spin_lock_irqsave(&dum->lock, flags); | |
503 | + | |
504 | + /* store old status and compare now and old later */ | |
505 | + if (dbg_flag_vhci_rh) { | |
506 | + int i = 0; | |
507 | + for (i = 0; i < VHCI_NPORTS; i++) | |
508 | + prev_port_status[i] = dum->port_status[i]; | |
509 | + } | |
510 | + | |
511 | + switch (typeReq) { | |
512 | + case ClearHubFeature: | |
513 | + dbg_vhci_rh(" ClearHubFeature\n"); | |
514 | + break; | |
515 | + case ClearPortFeature: | |
516 | + switch (wValue) { | |
517 | + case USB_PORT_FEAT_SUSPEND: | |
518 | + if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) { | |
519 | + /* 20msec signaling */ | |
520 | + dum->resuming = 1; | |
521 | + dum->re_timeout = | |
522 | + jiffies + msecs_to_jiffies(20); | |
523 | + } | |
524 | + break; | |
525 | + case USB_PORT_FEAT_POWER: | |
526 | + dbg_vhci_rh(" ClearPortFeature: USB_PORT_FEAT_POWER\n"); | |
527 | + dum->port_status[rhport] = 0; | |
528 | + /* dum->address = 0; */ | |
529 | + /* dum->hdev = 0; */ | |
530 | + dum->resuming = 0; | |
531 | + break; | |
532 | + case USB_PORT_FEAT_C_RESET: | |
533 | + dbg_vhci_rh(" ClearPortFeature: " | |
534 | + "USB_PORT_FEAT_C_RESET\n"); | |
535 | + switch (dum->vdev[rhport].speed) { | |
536 | + case USB_SPEED_HIGH: | |
537 | + dum->port_status[rhport] |= | |
538 | + USB_PORT_STAT_HIGH_SPEED; | |
539 | + break; | |
540 | + case USB_SPEED_LOW: | |
541 | + dum->port_status[rhport] |= | |
542 | + USB_PORT_STAT_LOW_SPEED; | |
543 | + break; | |
544 | + default: | |
545 | + break; | |
546 | + } | |
547 | + default: | |
548 | + dbg_vhci_rh(" ClearPortFeature: default %x\n", wValue); | |
549 | + dum->port_status[rhport] &= ~(1 << wValue); | |
550 | + } | |
551 | + break; | |
552 | + case GetHubDescriptor: | |
553 | + dbg_vhci_rh(" GetHubDescriptor\n"); | |
554 | + hub_descriptor((struct usb_hub_descriptor *) buf); | |
555 | + break; | |
556 | + case GetHubStatus: | |
557 | + dbg_vhci_rh(" GetHubStatus\n"); | |
558 | + *(__le32 *) buf = __constant_cpu_to_le32(0); | |
559 | + break; | |
560 | + case GetPortStatus: | |
561 | + dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); | |
562 | + if (wIndex > VHCI_NPORTS || wIndex < 1) { | |
563 | + printk(KERN_ERR "%s: invalid port number %d\n", | |
564 | + __func__, wIndex); | |
565 | + retval = -EPIPE; | |
566 | + } | |
567 | + | |
568 | + /* we do no care of resume. */ | |
569 | + | |
570 | + /* whoever resets or resumes must GetPortStatus to | |
571 | + * complete it!! | |
572 | + * */ | |
573 | + if (dum->resuming && time_after(jiffies, dum->re_timeout)) { | |
574 | + printk(KERN_ERR "%s: not yet\n", __func__); | |
575 | + dum->port_status[rhport] |= | |
576 | + (1 << USB_PORT_FEAT_C_SUSPEND); | |
577 | + dum->port_status[rhport] &= | |
578 | + ~(1 << USB_PORT_FEAT_SUSPEND); | |
579 | + dum->resuming = 0; | |
580 | + dum->re_timeout = 0; | |
581 | + /* if (dum->driver && dum->driver->resume) { | |
582 | + * spin_unlock (&dum->lock); | |
583 | + * dum->driver->resume (&dum->gadget); | |
584 | + * spin_lock (&dum->lock); | |
585 | + * } */ | |
586 | + } | |
587 | + | |
588 | + if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != | |
589 | + 0 && time_after(jiffies, dum->re_timeout)) { | |
590 | + dum->port_status[rhport] |= | |
591 | + (1 << USB_PORT_FEAT_C_RESET); | |
592 | + dum->port_status[rhport] &= | |
593 | + ~(1 << USB_PORT_FEAT_RESET); | |
594 | + dum->re_timeout = 0; | |
595 | + | |
596 | + if (dum->vdev[rhport].ud.status == | |
597 | + VDEV_ST_NOTASSIGNED) { | |
598 | + dbg_vhci_rh(" enable rhport %d (status %u)\n", | |
599 | + rhport, | |
600 | + dum->vdev[rhport].ud.status); | |
601 | + dum->port_status[rhport] |= | |
602 | + USB_PORT_STAT_ENABLE; | |
603 | + } | |
604 | +#if 0 | |
605 | + if (dum->driver) { | |
606 | + | |
607 | + dum->port_status[rhport] |= | |
608 | + USB_PORT_STAT_ENABLE; | |
609 | + /* give it the best speed we agree on */ | |
610 | + dum->gadget.speed = dum->driver->speed; | |
611 | + dum->gadget.ep0->maxpacket = 64; | |
612 | + switch (dum->gadget.speed) { | |
613 | + case USB_SPEED_HIGH: | |
614 | + dum->port_status[rhport] |= | |
615 | + USB_PORT_STAT_HIGH_SPEED; | |
616 | + break; | |
617 | + case USB_SPEED_LOW: | |
618 | + dum->gadget.ep0->maxpacket = 8; | |
619 | + dum->port_status[rhport] |= | |
620 | + USB_PORT_STAT_LOW_SPEED; | |
621 | + break; | |
622 | + default: | |
623 | + dum->gadget.speed = USB_SPEED_FULL; | |
624 | + break; | |
625 | + } | |
626 | + } | |
627 | +#endif | |
628 | + | |
629 | + } | |
630 | + ((u16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]); | |
631 | + ((u16 *) buf)[1] = | |
632 | + cpu_to_le16(dum->port_status[rhport] >> 16); | |
633 | + | |
634 | + dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0], | |
635 | + ((u16 *)buf)[1]); | |
636 | + break; | |
637 | + case SetHubFeature: | |
638 | + dbg_vhci_rh(" SetHubFeature\n"); | |
639 | + retval = -EPIPE; | |
640 | + break; | |
641 | + case SetPortFeature: | |
642 | + switch (wValue) { | |
643 | + case USB_PORT_FEAT_SUSPEND: | |
644 | + dbg_vhci_rh(" SetPortFeature: " | |
645 | + "USB_PORT_FEAT_SUSPEND\n"); | |
646 | + printk(KERN_ERR "%s: not yet\n", __func__); | |
647 | +#if 0 | |
648 | + dum->port_status[rhport] |= | |
649 | + (1 << USB_PORT_FEAT_SUSPEND); | |
650 | + if (dum->driver->suspend) { | |
651 | + spin_unlock(&dum->lock); | |
652 | + dum->driver->suspend(&dum->gadget); | |
653 | + spin_lock(&dum->lock); | |
654 | + } | |
655 | +#endif | |
656 | + break; | |
657 | + case USB_PORT_FEAT_RESET: | |
658 | + dbg_vhci_rh(" SetPortFeature: USB_PORT_FEAT_RESET\n"); | |
659 | + /* if it's already running, disconnect first */ | |
660 | + if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) { | |
661 | + dum->port_status[rhport] &= | |
662 | + ~(USB_PORT_STAT_ENABLE | | |
663 | + USB_PORT_STAT_LOW_SPEED | | |
664 | + USB_PORT_STAT_HIGH_SPEED); | |
665 | +#if 0 | |
666 | + if (dum->driver) { | |
667 | + dev_dbg(hardware, "disconnect\n"); | |
668 | + stop_activity(dum, dum->driver); | |
669 | + } | |
670 | +#endif | |
671 | + | |
672 | + /* FIXME test that code path! */ | |
673 | + } | |
674 | + /* 50msec reset signaling */ | |
675 | + dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
676 | + | |
677 | + /* FALLTHROUGH */ | |
678 | + default: | |
679 | + dbg_vhci_rh(" SetPortFeature: default %d\n", wValue); | |
680 | + dum->port_status[rhport] |= (1 << wValue); | |
681 | + } | |
682 | + break; | |
683 | + | |
684 | + default: | |
685 | + printk(KERN_ERR "%s: default: no such request\n", __func__); | |
686 | + /* dev_dbg (hardware, | |
687 | + * "hub control req%04x v%04x i%04x l%d\n", | |
688 | + * typeReq, wValue, wIndex, wLength); */ | |
689 | + | |
690 | + /* "protocol stall" on error */ | |
691 | + retval = -EPIPE; | |
692 | + } | |
693 | + | |
694 | + if (dbg_flag_vhci_rh) { | |
695 | + printk(KERN_DEBUG "port %d\n", rhport); | |
696 | + dump_port_status(prev_port_status[rhport]); | |
697 | + dump_port_status(dum->port_status[rhport]); | |
698 | + } | |
699 | + dbg_vhci_rh(" bye\n"); | |
700 | + | |
701 | + spin_unlock_irqrestore(&dum->lock, flags); | |
702 | + | |
703 | + return retval; | |
704 | +} | |
705 | + | |
706 | + | |
707 | + | |
708 | +/*----------------------------------------------------------------------*/ | |
709 | + | |
710 | +static struct vhci_device *get_vdev(struct usb_device *udev) | |
711 | +{ | |
712 | + int i; | |
713 | + | |
714 | + if (!udev) | |
715 | + return NULL; | |
716 | + | |
717 | + for (i = 0; i < VHCI_NPORTS; i++) | |
718 | + if (the_controller->vdev[i].udev == udev) | |
719 | + return port_to_vdev(i); | |
720 | + | |
721 | + return NULL; | |
722 | +} | |
723 | + | |
724 | +static void vhci_tx_urb(struct urb *urb) | |
725 | +{ | |
726 | + struct vhci_device *vdev = get_vdev(urb->dev); | |
727 | + struct vhci_priv *priv; | |
728 | + unsigned long flag; | |
729 | + | |
730 | + if (!vdev) { | |
731 | + err("could not get virtual device"); | |
732 | + /* BUG(); */ | |
733 | + return; | |
734 | + } | |
735 | + | |
736 | + spin_lock_irqsave(&vdev->priv_lock, flag); | |
737 | + | |
738 | + priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC); | |
739 | + if (!priv) { | |
740 | + dev_err(&urb->dev->dev, "malloc vhci_priv\n"); | |
741 | + spin_unlock_irqrestore(&vdev->priv_lock, flag); | |
742 | + usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); | |
743 | + return; | |
744 | + } | |
745 | + | |
746 | + priv->seqnum = atomic_inc_return(&the_controller->seqnum); | |
747 | + if (priv->seqnum == 0xffff) | |
748 | + uinfo("seqnum max\n"); | |
749 | + | |
750 | + priv->vdev = vdev; | |
751 | + priv->urb = urb; | |
752 | + | |
753 | + urb->hcpriv = (void *) priv; | |
754 | + | |
755 | + | |
756 | + list_add_tail(&priv->list, &vdev->priv_tx); | |
757 | + | |
758 | + wake_up(&vdev->waitq_tx); | |
759 | + spin_unlock_irqrestore(&vdev->priv_lock, flag); | |
760 | +} | |
761 | + | |
762 | +static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
763 | + gfp_t mem_flags) | |
764 | +{ | |
765 | + struct device *dev = &urb->dev->dev; | |
766 | + int ret = 0; | |
767 | + unsigned long flags; | |
768 | + | |
769 | + dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n", | |
770 | + hcd, urb, mem_flags); | |
771 | + | |
772 | + /* patch to usb_sg_init() is in 2.5.60 */ | |
773 | + BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length); | |
774 | + | |
775 | + spin_lock_irqsave(&the_controller->lock, flags); | |
776 | + | |
777 | + /* check HC is active or not */ | |
778 | + if (!HC_IS_RUNNING(hcd->state)) { | |
779 | + dev_err(dev, "HC is not running\n"); | |
780 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
781 | + return -ENODEV; | |
782 | + } | |
783 | + | |
784 | + if (urb->status != -EINPROGRESS) { | |
785 | + dev_err(dev, "URB already unlinked!, status %d\n", urb->status); | |
786 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
787 | + return urb->status; | |
788 | + } | |
789 | + | |
790 | + ret = usb_hcd_link_urb_to_ep(hcd, urb); | |
791 | + if (ret) | |
792 | + goto no_need_unlink; | |
793 | + | |
794 | + /* | |
795 | + * The enumelation process is as follows; | |
796 | + * | |
797 | + * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0) | |
798 | + * to get max packet length of default pipe | |
799 | + * | |
800 | + * 2. Set_Address request to DevAddr(0) EndPoint(0) | |
801 | + * | |
802 | + */ | |
803 | + | |
804 | + if (usb_pipedevice(urb->pipe) == 0) { | |
805 | + __u8 type = usb_pipetype(urb->pipe); | |
806 | + struct usb_ctrlrequest *ctrlreq = | |
807 | + (struct usb_ctrlrequest *) urb->setup_packet; | |
808 | + struct vhci_device *vdev = | |
809 | + port_to_vdev(the_controller->pending_port); | |
810 | + | |
811 | + if (type != PIPE_CONTROL || !ctrlreq) { | |
812 | + dev_err(dev, "invalid request to devnum 0\n"); | |
813 | + ret = EINVAL; | |
814 | + goto no_need_xmit; | |
815 | + } | |
816 | + | |
817 | + switch (ctrlreq->bRequest) { | |
818 | + case USB_REQ_SET_ADDRESS: | |
819 | + /* set_address may come when a device is reset */ | |
820 | + dev_info(dev, "SetAddress Request (%d) to port %d\n", | |
821 | + ctrlreq->wValue, vdev->rhport); | |
822 | + | |
823 | + vdev->udev = urb->dev; | |
824 | + | |
825 | + spin_lock(&vdev->ud.lock); | |
826 | + vdev->ud.status = VDEV_ST_USED; | |
827 | + spin_unlock(&vdev->ud.lock); | |
828 | + | |
829 | + if (urb->status == -EINPROGRESS) { | |
830 | + /* This request is successfully completed. */ | |
831 | + /* If not -EINPROGRESS, possibly unlinked. */ | |
832 | + urb->status = 0; | |
833 | + } | |
834 | + | |
835 | + goto no_need_xmit; | |
836 | + | |
837 | + case USB_REQ_GET_DESCRIPTOR: | |
838 | + if (ctrlreq->wValue == (USB_DT_DEVICE << 8)) | |
839 | + dbg_vhci_hc("Not yet?: " | |
840 | + "Get_Descriptor to device 0 " | |
841 | + "(get max pipe size)\n"); | |
842 | + | |
843 | + /* FIXME: reference count? (usb_get_dev()) */ | |
844 | + vdev->udev = urb->dev; | |
845 | + goto out; | |
846 | + | |
847 | + default: | |
848 | + /* NOT REACHED */ | |
849 | + dev_err(dev, "invalid request to devnum 0 bRequest %u, " | |
850 | + "wValue %u\n", ctrlreq->bRequest, | |
851 | + ctrlreq->wValue); | |
852 | + ret = -EINVAL; | |
853 | + goto no_need_xmit; | |
854 | + } | |
855 | + | |
856 | + } | |
857 | + | |
858 | +out: | |
859 | + vhci_tx_urb(urb); | |
860 | + | |
861 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
862 | + | |
863 | + return 0; | |
864 | + | |
865 | +no_need_xmit: | |
866 | + usb_hcd_unlink_urb_from_ep(hcd, urb); | |
867 | +no_need_unlink: | |
868 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
869 | + | |
870 | + usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status); | |
871 | + | |
872 | + return 0; | |
873 | +} | |
874 | + | |
875 | +/* | |
876 | + * vhci_rx gives back the urb after receiving the reply of the urb. If an | |
877 | + * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives | |
878 | + * back its urb. For the driver unlinking the urb, the content of the urb is | |
879 | + * not important, but the calling to its completion handler is important; the | |
880 | + * completion of unlinking is notified by the completion handler. | |
881 | + * | |
882 | + * | |
883 | + * CLIENT SIDE | |
884 | + * | |
885 | + * - When vhci_hcd receives RET_SUBMIT, | |
886 | + * | |
887 | + * - case 1a). the urb of the pdu is not unlinking. | |
888 | + * - normal case | |
889 | + * => just give back the urb | |
890 | + * | |
891 | + * - case 1b). the urb of the pdu is unlinking. | |
892 | + * - usbip.ko will return a reply of the unlinking request. | |
893 | + * => give back the urb now and go to case 2b). | |
894 | + * | |
895 | + * - When vhci_hcd receives RET_UNLINK, | |
896 | + * | |
897 | + * - case 2a). a submit request is still pending in vhci_hcd. | |
898 | + * - urb was really pending in usbip.ko and urb_unlink_urb() was | |
899 | + * completed there. | |
900 | + * => free a pending submit request | |
901 | + * => notify unlink completeness by giving back the urb | |
902 | + * | |
903 | + * - case 2b). a submit request is *not* pending in vhci_hcd. | |
904 | + * - urb was already given back to the core driver. | |
905 | + * => do not give back the urb | |
906 | + * | |
907 | + * | |
908 | + * SERVER SIDE | |
909 | + * | |
910 | + * - When usbip receives CMD_UNLINK, | |
911 | + * | |
912 | + * - case 3a). the urb of the unlink request is now in submission. | |
913 | + * => do usb_unlink_urb(). | |
914 | + * => after the unlink is completed, send RET_UNLINK. | |
915 | + * | |
916 | + * - case 3b). the urb of the unlink request is not in submission. | |
917 | + * - may be already completed or never be received | |
918 | + * => send RET_UNLINK | |
919 | + * | |
920 | + */ | |
921 | +static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
922 | +{ | |
923 | + unsigned long flags; | |
924 | + struct vhci_priv *priv; | |
925 | + struct vhci_device *vdev; | |
926 | + | |
927 | + uinfo("vhci_hcd: dequeue a urb %p\n", urb); | |
928 | + | |
929 | + | |
930 | + spin_lock_irqsave(&the_controller->lock, flags); | |
931 | + | |
932 | + priv = urb->hcpriv; | |
933 | + if (!priv) { | |
934 | + /* URB was never linked! or will be soon given back by | |
935 | + * vhci_rx. */ | |
936 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
937 | + return 0; | |
938 | + } | |
939 | + | |
940 | + { | |
941 | + int ret = 0; | |
942 | + ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
943 | + if (ret) { | |
944 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
945 | + return 0; | |
946 | + } | |
947 | + } | |
948 | + | |
949 | + /* send unlink request here? */ | |
950 | + vdev = priv->vdev; | |
951 | + | |
952 | + if (!vdev->ud.tcp_socket) { | |
953 | + /* tcp connection is closed */ | |
954 | + unsigned long flags2; | |
955 | + | |
956 | + spin_lock_irqsave(&vdev->priv_lock, flags2); | |
957 | + | |
958 | + uinfo("vhci_hcd: device %p seems to be disconnected\n", vdev); | |
959 | + list_del(&priv->list); | |
960 | + kfree(priv); | |
961 | + urb->hcpriv = NULL; | |
962 | + | |
963 | + spin_unlock_irqrestore(&vdev->priv_lock, flags2); | |
964 | + | |
965 | + } else { | |
966 | + /* tcp connection is alive */ | |
967 | + unsigned long flags2; | |
968 | + struct vhci_unlink *unlink; | |
969 | + | |
970 | + spin_lock_irqsave(&vdev->priv_lock, flags2); | |
971 | + | |
972 | + /* setup CMD_UNLINK pdu */ | |
973 | + unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC); | |
974 | + if (!unlink) { | |
975 | + uerr("malloc vhci_unlink\n"); | |
976 | + spin_unlock_irqrestore(&vdev->priv_lock, flags2); | |
977 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
978 | + usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); | |
979 | + return -ENOMEM; | |
980 | + } | |
981 | + | |
982 | + unlink->seqnum = atomic_inc_return(&the_controller->seqnum); | |
983 | + if (unlink->seqnum == 0xffff) | |
984 | + uinfo("seqnum max\n"); | |
985 | + | |
986 | + unlink->unlink_seqnum = priv->seqnum; | |
987 | + | |
988 | + uinfo("vhci_hcd: device %p seems to be still connected\n", | |
989 | + vdev); | |
990 | + | |
991 | + /* send cmd_unlink and try to cancel the pending URB in the | |
992 | + * peer */ | |
993 | + list_add_tail(&unlink->list, &vdev->unlink_tx); | |
994 | + wake_up(&vdev->waitq_tx); | |
995 | + | |
996 | + spin_unlock_irqrestore(&vdev->priv_lock, flags2); | |
997 | + } | |
998 | + | |
999 | + | |
1000 | + /* | |
1001 | + * If tcp connection is alive, we have sent CMD_UNLINK. | |
1002 | + * vhci_rx will receive RET_UNLINK and give back the URB. | |
1003 | + * Otherwise, we give back it here. | |
1004 | + */ | |
1005 | + if (!vdev->ud.tcp_socket) { | |
1006 | + /* tcp connection is closed */ | |
1007 | + uinfo("vhci_hcd: vhci_urb_dequeue() gives back urb %p\n", urb); | |
1008 | + | |
1009 | + usb_hcd_unlink_urb_from_ep(hcd, urb); | |
1010 | + | |
1011 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
1012 | + usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, | |
1013 | + urb->status); | |
1014 | + spin_lock_irqsave(&the_controller->lock, flags); | |
1015 | + } | |
1016 | + | |
1017 | + spin_unlock_irqrestore(&the_controller->lock, flags); | |
1018 | + | |
1019 | + dbg_vhci_hc("leave\n"); | |
1020 | + return 0; | |
1021 | +} | |
1022 | + | |
1023 | + | |
1024 | +static void vhci_device_unlink_cleanup(struct vhci_device *vdev) | |
1025 | +{ | |
1026 | + struct vhci_unlink *unlink, *tmp; | |
1027 | + | |
1028 | + spin_lock(&vdev->priv_lock); | |
1029 | + | |
1030 | + list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { | |
1031 | + list_del(&unlink->list); | |
1032 | + kfree(unlink); | |
1033 | + } | |
1034 | + | |
1035 | + list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) { | |
1036 | + list_del(&unlink->list); | |
1037 | + kfree(unlink); | |
1038 | + } | |
1039 | + | |
1040 | + spin_unlock(&vdev->priv_lock); | |
1041 | +} | |
1042 | + | |
1043 | +/* | |
1044 | + * The important thing is that only one context begins cleanup. | |
1045 | + * This is why error handling and cleanup become simple. | |
1046 | + * We do not want to consider race condition as possible. | |
1047 | + */ | |
1048 | +static void vhci_shutdown_connection(struct usbip_device *ud) | |
1049 | +{ | |
1050 | + struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
1051 | + | |
1052 | + /* need this? see stub_dev.c */ | |
1053 | + if (ud->tcp_socket) { | |
1054 | + udbg("shutdown tcp_socket %p\n", ud->tcp_socket); | |
1055 | + kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); | |
1056 | + } | |
1057 | + | |
1058 | + usbip_stop_threads(&vdev->ud); | |
1059 | + uinfo("stop threads\n"); | |
1060 | + | |
1061 | + /* active connection is closed */ | |
1062 | + if (vdev->ud.tcp_socket != NULL) { | |
1063 | + sock_release(vdev->ud.tcp_socket); | |
1064 | + vdev->ud.tcp_socket = NULL; | |
1065 | + } | |
1066 | + uinfo("release socket\n"); | |
1067 | + | |
1068 | + vhci_device_unlink_cleanup(vdev); | |
1069 | + | |
1070 | + /* | |
1071 | + * rh_port_disconnect() is a trigger of ... | |
1072 | + * usb_disable_device(): | |
1073 | + * disable all the endpoints for a USB device. | |
1074 | + * usb_disable_endpoint(): | |
1075 | + * disable endpoints. pending urbs are unlinked(dequeued). | |
1076 | + * | |
1077 | + * NOTE: After calling rh_port_disconnect(), the USB device drivers of a | |
1078 | + * deteched device should release used urbs in a cleanup function(i.e. | |
1079 | + * xxx_disconnect()). Therefore, vhci_hcd does not need to release | |
1080 | + * pushed urbs and their private data in this function. | |
1081 | + * | |
1082 | + * NOTE: vhci_dequeue() must be considered carefully. When shutdowning | |
1083 | + * a connection, vhci_shutdown_connection() expects vhci_dequeue() | |
1084 | + * gives back pushed urbs and frees their private data by request of | |
1085 | + * the cleanup function of a USB driver. When unlinking a urb with an | |
1086 | + * active connection, vhci_dequeue() does not give back the urb which | |
1087 | + * is actually given back by vhci_rx after receiving its return pdu. | |
1088 | + * | |
1089 | + */ | |
1090 | + rh_port_disconnect(vdev->rhport); | |
1091 | + | |
1092 | + uinfo("disconnect device\n"); | |
1093 | +} | |
1094 | + | |
1095 | + | |
1096 | +static void vhci_device_reset(struct usbip_device *ud) | |
1097 | +{ | |
1098 | + struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
1099 | + | |
1100 | + spin_lock(&ud->lock); | |
1101 | + | |
1102 | + vdev->speed = 0; | |
1103 | + vdev->devid = 0; | |
1104 | + | |
1105 | + ud->tcp_socket = NULL; | |
1106 | + | |
1107 | + ud->status = VDEV_ST_NULL; | |
1108 | + | |
1109 | + spin_unlock(&ud->lock); | |
1110 | +} | |
1111 | + | |
1112 | +static void vhci_device_unusable(struct usbip_device *ud) | |
1113 | +{ | |
1114 | + spin_lock(&ud->lock); | |
1115 | + | |
1116 | + ud->status = VDEV_ST_ERROR; | |
1117 | + | |
1118 | + spin_unlock(&ud->lock); | |
1119 | +} | |
1120 | + | |
1121 | +static void vhci_device_init(struct vhci_device *vdev) | |
1122 | +{ | |
1123 | + memset(vdev, 0, sizeof(*vdev)); | |
1124 | + | |
1125 | + usbip_task_init(&vdev->ud.tcp_rx, "vhci_rx", vhci_rx_loop); | |
1126 | + usbip_task_init(&vdev->ud.tcp_tx, "vhci_tx", vhci_tx_loop); | |
1127 | + | |
1128 | + vdev->ud.side = USBIP_VHCI; | |
1129 | + vdev->ud.status = VDEV_ST_NULL; | |
1130 | + /* vdev->ud.lock = SPIN_LOCK_UNLOCKED; */ | |
1131 | + spin_lock_init(&vdev->ud.lock); | |
1132 | + | |
1133 | + INIT_LIST_HEAD(&vdev->priv_rx); | |
1134 | + INIT_LIST_HEAD(&vdev->priv_tx); | |
1135 | + INIT_LIST_HEAD(&vdev->unlink_tx); | |
1136 | + INIT_LIST_HEAD(&vdev->unlink_rx); | |
1137 | + /* vdev->priv_lock = SPIN_LOCK_UNLOCKED; */ | |
1138 | + spin_lock_init(&vdev->priv_lock); | |
1139 | + | |
1140 | + init_waitqueue_head(&vdev->waitq_tx); | |
1141 | + | |
1142 | + vdev->ud.eh_ops.shutdown = vhci_shutdown_connection; | |
1143 | + vdev->ud.eh_ops.reset = vhci_device_reset; | |
1144 | + vdev->ud.eh_ops.unusable = vhci_device_unusable; | |
1145 | + | |
1146 | + usbip_start_eh(&vdev->ud); | |
1147 | +} | |
1148 | + | |
1149 | + | |
1150 | +/*----------------------------------------------------------------------*/ | |
1151 | + | |
1152 | +static int vhci_start(struct usb_hcd *hcd) | |
1153 | +{ | |
1154 | + struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
1155 | + int rhport; | |
1156 | + int err = 0; | |
1157 | + | |
1158 | + dbg_vhci_hc("enter vhci_start\n"); | |
1159 | + | |
1160 | + | |
1161 | + /* initialize private data of usb_hcd */ | |
1162 | + | |
1163 | + for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { | |
1164 | + struct vhci_device *vdev = &vhci->vdev[rhport]; | |
1165 | + vhci_device_init(vdev); | |
1166 | + vdev->rhport = rhport; | |
1167 | + } | |
1168 | + | |
1169 | + atomic_set(&vhci->seqnum, 0); | |
1170 | + spin_lock_init(&vhci->lock); | |
1171 | + | |
1172 | + | |
1173 | + | |
1174 | + hcd->power_budget = 0; /* no limit */ | |
1175 | + hcd->state = HC_STATE_RUNNING; | |
1176 | + hcd->uses_new_polling = 1; | |
1177 | + | |
1178 | + | |
1179 | + /* vhci_hcd is now ready to be controlled through sysfs */ | |
1180 | + err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group); | |
1181 | + if (err) { | |
1182 | + uerr("create sysfs files\n"); | |
1183 | + return err; | |
1184 | + } | |
1185 | + | |
1186 | + return 0; | |
1187 | +} | |
1188 | + | |
1189 | +static void vhci_stop(struct usb_hcd *hcd) | |
1190 | +{ | |
1191 | + struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
1192 | + int rhport = 0; | |
1193 | + | |
1194 | + dbg_vhci_hc("stop VHCI controller\n"); | |
1195 | + | |
1196 | + | |
1197 | + /* 1. remove the userland interface of vhci_hcd */ | |
1198 | + sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group); | |
1199 | + | |
1200 | + /* 2. shutdown all the ports of vhci_hcd */ | |
1201 | + for (rhport = 0 ; rhport < VHCI_NPORTS; rhport++) { | |
1202 | + struct vhci_device *vdev = &vhci->vdev[rhport]; | |
1203 | + | |
1204 | + usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED); | |
1205 | + usbip_stop_eh(&vdev->ud); | |
1206 | + } | |
1207 | + | |
1208 | + | |
1209 | + uinfo("vhci_stop done\n"); | |
1210 | +} | |
1211 | + | |
1212 | +/*----------------------------------------------------------------------*/ | |
1213 | + | |
1214 | +static int vhci_get_frame_number(struct usb_hcd *hcd) | |
1215 | +{ | |
1216 | + uerr("Not yet implemented\n"); | |
1217 | + return 0; | |
1218 | +} | |
1219 | + | |
1220 | + | |
1221 | +#ifdef CONFIG_PM | |
1222 | + | |
1223 | +/* FIXME: suspend/resume */ | |
1224 | +static int vhci_bus_suspend(struct usb_hcd *hcd) | |
1225 | +{ | |
1226 | + struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
1227 | + | |
1228 | + dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); | |
1229 | + | |
1230 | + spin_lock_irq(&vhci->lock); | |
1231 | + /* vhci->rh_state = DUMMY_RH_SUSPENDED; | |
1232 | + * set_link_state(vhci); */ | |
1233 | + hcd->state = HC_STATE_SUSPENDED; | |
1234 | + spin_unlock_irq(&vhci->lock); | |
1235 | + | |
1236 | + return 0; | |
1237 | +} | |
1238 | + | |
1239 | +static int vhci_bus_resume(struct usb_hcd *hcd) | |
1240 | +{ | |
1241 | + struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
1242 | + int rc = 0; | |
1243 | + | |
1244 | + dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); | |
1245 | + | |
1246 | + spin_lock_irq(&vhci->lock); | |
1247 | + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { | |
1248 | + rc = -ESHUTDOWN; | |
1249 | + } else { | |
1250 | + /* vhci->rh_state = DUMMY_RH_RUNNING; | |
1251 | + * set_link_state(vhci); | |
1252 | + * if (!list_empty(&vhci->urbp_list)) | |
1253 | + * mod_timer(&vhci->timer, jiffies); */ | |
1254 | + hcd->state = HC_STATE_RUNNING; | |
1255 | + } | |
1256 | + spin_unlock_irq(&vhci->lock); | |
1257 | + return rc; | |
1258 | + | |
1259 | + return 0; | |
1260 | +} | |
1261 | + | |
1262 | +#else | |
1263 | + | |
1264 | +#define vhci_bus_suspend NULL | |
1265 | +#define vhci_bus_resume NULL | |
1266 | +#endif | |
1267 | + | |
1268 | + | |
1269 | + | |
1270 | +static struct hc_driver vhci_hc_driver = { | |
1271 | + .description = driver_name, | |
1272 | + .product_desc = driver_desc, | |
1273 | + .hcd_priv_size = sizeof(struct vhci_hcd), | |
1274 | + | |
1275 | + .flags = HCD_USB2, | |
1276 | + | |
1277 | + .start = vhci_start, | |
1278 | + .stop = vhci_stop, | |
1279 | + | |
1280 | + .urb_enqueue = vhci_urb_enqueue, | |
1281 | + .urb_dequeue = vhci_urb_dequeue, | |
1282 | + | |
1283 | + .get_frame_number = vhci_get_frame_number, | |
1284 | + | |
1285 | + .hub_status_data = vhci_hub_status, | |
1286 | + .hub_control = vhci_hub_control, | |
1287 | + .bus_suspend = vhci_bus_suspend, | |
1288 | + .bus_resume = vhci_bus_resume, | |
1289 | +}; | |
1290 | + | |
1291 | +static int vhci_hcd_probe(struct platform_device *pdev) | |
1292 | +{ | |
1293 | + struct usb_hcd *hcd; | |
1294 | + int ret; | |
1295 | + | |
1296 | + uinfo("proving...\n"); | |
1297 | + | |
1298 | + dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id); | |
1299 | + | |
1300 | + /* will be removed */ | |
1301 | + if (pdev->dev.dma_mask) { | |
1302 | + dev_info(&pdev->dev, "vhci_hcd DMA not supported\n"); | |
1303 | + return -EINVAL; | |
1304 | + } | |
1305 | + | |
1306 | + /* | |
1307 | + * Allocate and initialize hcd. | |
1308 | + * Our private data is also allocated automatically. | |
1309 | + */ | |
1310 | + hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, pdev->dev.bus_id); | |
1311 | + if (!hcd) { | |
1312 | + uerr("create hcd failed\n"); | |
1313 | + return -ENOMEM; | |
1314 | + } | |
1315 | + | |
1316 | + | |
1317 | + /* this is private data for vhci_hcd */ | |
1318 | + the_controller = hcd_to_vhci(hcd); | |
1319 | + | |
1320 | + /* | |
1321 | + * Finish generic HCD structure initialization and register. | |
1322 | + * Call the driver's reset() and start() routines. | |
1323 | + */ | |
1324 | + ret = usb_add_hcd(hcd, 0, 0); | |
1325 | + if (ret != 0) { | |
1326 | + uerr("usb_add_hcd failed %d\n", ret); | |
1327 | + usb_put_hcd(hcd); | |
1328 | + the_controller = NULL; | |
1329 | + return ret; | |
1330 | + } | |
1331 | + | |
1332 | + | |
1333 | + dbg_vhci_hc("bye\n"); | |
1334 | + return 0; | |
1335 | +} | |
1336 | + | |
1337 | + | |
1338 | +static int vhci_hcd_remove(struct platform_device *pdev) | |
1339 | +{ | |
1340 | + struct usb_hcd *hcd; | |
1341 | + | |
1342 | + hcd = platform_get_drvdata(pdev); | |
1343 | + if (!hcd) | |
1344 | + return 0; | |
1345 | + | |
1346 | + /* | |
1347 | + * Disconnects the root hub, | |
1348 | + * then reverses the effects of usb_add_hcd(), | |
1349 | + * invoking the HCD's stop() methods. | |
1350 | + */ | |
1351 | + usb_remove_hcd(hcd); | |
1352 | + usb_put_hcd(hcd); | |
1353 | + the_controller = NULL; | |
1354 | + | |
1355 | + | |
1356 | + return 0; | |
1357 | +} | |
1358 | + | |
1359 | + | |
1360 | + | |
1361 | +#ifdef CONFIG_PM | |
1362 | + | |
1363 | +/* what should happen for USB/IP under suspend/resume? */ | |
1364 | +static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) | |
1365 | +{ | |
1366 | + struct usb_hcd *hcd; | |
1367 | + int rhport = 0; | |
1368 | + int connected = 0; | |
1369 | + int ret = 0; | |
1370 | + | |
1371 | + dev_dbg(&pdev->dev, "%s\n", __func__); | |
1372 | + | |
1373 | + hcd = platform_get_drvdata(pdev); | |
1374 | + | |
1375 | + spin_lock(&the_controller->lock); | |
1376 | + | |
1377 | + for (rhport = 0; rhport < VHCI_NPORTS; rhport++) | |
1378 | + if (the_controller->port_status[rhport] & | |
1379 | + USB_PORT_STAT_CONNECTION) | |
1380 | + connected += 1; | |
1381 | + | |
1382 | + spin_unlock(&the_controller->lock); | |
1383 | + | |
1384 | + if (connected > 0) { | |
1385 | + uinfo("We have %d active connection%s. Do not suspend.\n", | |
1386 | + connected, (connected == 1 ? "" : "s")); | |
1387 | + ret = -EBUSY; | |
1388 | + } else { | |
1389 | + uinfo("suspend vhci_hcd"); | |
1390 | + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1391 | + } | |
1392 | + | |
1393 | + return ret; | |
1394 | +} | |
1395 | + | |
1396 | +static int vhci_hcd_resume(struct platform_device *pdev) | |
1397 | +{ | |
1398 | + struct usb_hcd *hcd; | |
1399 | + | |
1400 | + dev_dbg(&pdev->dev, "%s\n", __func__); | |
1401 | + | |
1402 | + hcd = platform_get_drvdata(pdev); | |
1403 | + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1404 | + usb_hcd_poll_rh_status(hcd); | |
1405 | + | |
1406 | + return 0; | |
1407 | +} | |
1408 | + | |
1409 | +#else | |
1410 | + | |
1411 | +#define vhci_hcd_suspend NULL | |
1412 | +#define vhci_hcd_resume NULL | |
1413 | + | |
1414 | +#endif | |
1415 | + | |
1416 | + | |
1417 | +static struct platform_driver vhci_driver = { | |
1418 | + .probe = vhci_hcd_probe, | |
1419 | + .remove = __devexit_p(vhci_hcd_remove), | |
1420 | + .suspend = vhci_hcd_suspend, | |
1421 | + .resume = vhci_hcd_resume, | |
1422 | + .driver = { | |
1423 | + .name = (char *) driver_name, | |
1424 | + .owner = THIS_MODULE, | |
1425 | + }, | |
1426 | +}; | |
1427 | + | |
1428 | +/*----------------------------------------------------------------------*/ | |
1429 | + | |
1430 | +/* | |
1431 | + * The VHCI 'device' is 'virtual'; not a real plug&play hardware. | |
1432 | + * We need to add this virtual device as a platform device arbitrarily: | |
1433 | + * 1. platform_device_register() | |
1434 | + */ | |
1435 | +static void the_pdev_release(struct device *dev) | |
1436 | +{ | |
1437 | + return; | |
1438 | +} | |
1439 | + | |
1440 | +static struct platform_device the_pdev = { | |
1441 | + /* should be the same name as driver_name */ | |
1442 | + .name = (char *) driver_name, | |
1443 | + .id = -1, | |
1444 | + .dev = { | |
1445 | + /* .driver = &vhci_driver, */ | |
1446 | + .release = the_pdev_release, | |
1447 | + }, | |
1448 | +}; | |
1449 | + | |
1450 | +static int __init vhci_init(void) | |
1451 | +{ | |
1452 | + int ret; | |
1453 | + | |
1454 | + dbg_vhci_hc("enter\n"); | |
1455 | + if (usb_disabled()) | |
1456 | + return -ENODEV; | |
1457 | + | |
1458 | + printk(KERN_INFO KBUILD_MODNAME ": %s, %s\n", driver_name, | |
1459 | + DRIVER_VERSION); | |
1460 | + | |
1461 | + ret = platform_driver_register(&vhci_driver); | |
1462 | + if (ret < 0) | |
1463 | + goto err_driver_register; | |
1464 | + | |
1465 | + ret = platform_device_register(&the_pdev); | |
1466 | + if (ret < 0) | |
1467 | + goto err_platform_device_register; | |
1468 | + | |
1469 | + dbg_vhci_hc("bye\n"); | |
1470 | + return ret; | |
1471 | + | |
1472 | + /* error occurred */ | |
1473 | +err_platform_device_register: | |
1474 | + platform_driver_unregister(&vhci_driver); | |
1475 | + | |
1476 | +err_driver_register: | |
1477 | + dbg_vhci_hc("bye\n"); | |
1478 | + return ret; | |
1479 | +} | |
1480 | +module_init(vhci_init); | |
1481 | + | |
1482 | +static void __exit vhci_cleanup(void) | |
1483 | +{ | |
1484 | + dbg_vhci_hc("enter\n"); | |
1485 | + | |
1486 | + platform_device_unregister(&the_pdev); | |
1487 | + platform_driver_unregister(&vhci_driver); | |
1488 | + | |
1489 | + dbg_vhci_hc("bye\n"); | |
1490 | +} | |
1491 | +module_exit(vhci_cleanup); | |
1492 | diff --git a/drivers/staging/usbip/vhci_rx.c b/drivers/staging/usbip/vhci_rx.c | |
1493 | new file mode 100644 | |
1494 | index 0000000..933ccaf | |
1495 | --- /dev/null | |
1496 | +++ b/drivers/staging/usbip/vhci_rx.c | |
1497 | @@ -0,0 +1,251 @@ | |
1498 | +/* | |
1499 | + * Copyright (C) 2003-2008 Takahiro Hirofuchi | |
1500 | + * | |
1501 | + * This is free software; you can redistribute it and/or modify | |
1502 | + * it under the terms of the GNU General Public License as published by | |
1503 | + * the Free Software Foundation; either version 2 of the License, or | |
1504 | + * (at your option) any later version. | |
1505 | + * | |
1506 | + * This is distributed in the hope that it will be useful, | |
1507 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
1508 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
1509 | + * GNU General Public License for more details. | |
1510 | + * | |
1511 | + * You should have received a copy of the GNU General Public License | |
1512 | + * along with this program; if not, write to the Free Software | |
1513 | + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
1514 | + * USA. | |
1515 | + */ | |
1516 | + | |
1517 | +#include "usbip_common.h" | |
1518 | +#include "vhci.h" | |
1519 | + | |
1520 | + | |
1521 | +/* get URB from transmitted urb queue */ | |
1522 | +static struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev, | |
1523 | + __u32 seqnum) | |
1524 | +{ | |
1525 | + struct vhci_priv *priv, *tmp; | |
1526 | + struct urb *urb = NULL; | |
1527 | + int status; | |
1528 | + | |
1529 | + spin_lock(&vdev->priv_lock); | |
1530 | + | |
1531 | + list_for_each_entry_safe(priv, tmp, &vdev->priv_rx, list) { | |
1532 | + if (priv->seqnum == seqnum) { | |
1533 | + urb = priv->urb; | |
1534 | + status = urb->status; | |
1535 | + | |
1536 | + dbg_vhci_rx("find urb %p vurb %p seqnum %u\n", | |
1537 | + urb, priv, seqnum); | |
1538 | + | |
1539 | + /* TODO: fix logic here to improve indent situtation */ | |
1540 | + if (status != -EINPROGRESS) { | |
1541 | + if (status == -ENOENT || | |
1542 | + status == -ECONNRESET) | |
1543 | + dev_info(&urb->dev->dev, | |
1544 | + "urb %p was unlinked " | |
1545 | + "%ssynchronuously.\n", urb, | |
1546 | + status == -ENOENT ? "" : "a"); | |
1547 | + else | |
1548 | + dev_info(&urb->dev->dev, | |
1549 | + "urb %p may be in a error, " | |
1550 | + "status %d\n", urb, status); | |
1551 | + } | |
1552 | + | |
1553 | + list_del(&priv->list); | |
1554 | + kfree(priv); | |
1555 | + urb->hcpriv = NULL; | |
1556 | + | |
1557 | + break; | |
1558 | + } | |
1559 | + } | |
1560 | + | |
1561 | + spin_unlock(&vdev->priv_lock); | |
1562 | + | |
1563 | + return urb; | |
1564 | +} | |
1565 | + | |
1566 | +static void vhci_recv_ret_submit(struct vhci_device *vdev, | |
1567 | + struct usbip_header *pdu) | |
1568 | +{ | |
1569 | + struct usbip_device *ud = &vdev->ud; | |
1570 | + struct urb *urb; | |
1571 | + | |
1572 | + | |
1573 | + urb = pickup_urb_and_free_priv(vdev, pdu->base.seqnum); | |
1574 | + | |
1575 | + | |
1576 | + if (!urb) { | |
1577 | + uerr("cannot find a urb of seqnum %u\n", pdu->base.seqnum); | |
1578 | + uinfo("max seqnum %d\n", atomic_read(&the_controller->seqnum)); | |
1579 | + usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
1580 | + return; | |
1581 | + } | |
1582 | + | |
1583 | + | |
1584 | + /* unpack the pdu to a urb */ | |
1585 | + usbip_pack_pdu(pdu, urb, USBIP_RET_SUBMIT, 0); | |
1586 | + | |
1587 | + | |
1588 | + /* recv transfer buffer */ | |
1589 | + if (usbip_recv_xbuff(ud, urb) < 0) | |
1590 | + return; | |
1591 | + | |
1592 | + | |
1593 | + /* recv iso_packet_descriptor */ | |
1594 | + if (usbip_recv_iso(ud, urb) < 0) | |
1595 | + return; | |
1596 | + | |
1597 | + | |
1598 | + if (dbg_flag_vhci_rx) | |
1599 | + usbip_dump_urb(urb); | |
1600 | + | |
1601 | + | |
1602 | + dbg_vhci_rx("now giveback urb %p\n", urb); | |
1603 | + | |
1604 | + spin_lock(&the_controller->lock); | |
1605 | + usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb); | |
1606 | + spin_unlock(&the_controller->lock); | |
1607 | + | |
1608 | + usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status); | |
1609 | + | |
1610 | + | |
1611 | + dbg_vhci_rx("Leave\n"); | |
1612 | + | |
1613 | + return; | |
1614 | +} | |
1615 | + | |
1616 | + | |
1617 | +static struct vhci_unlink *dequeue_pending_unlink(struct vhci_device *vdev, | |
1618 | + struct usbip_header *pdu) | |
1619 | +{ | |
1620 | + struct vhci_unlink *unlink, *tmp; | |
1621 | + | |
1622 | + spin_lock(&vdev->priv_lock); | |
1623 | + | |
1624 | + list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) { | |
1625 | + uinfo("unlink->seqnum %lu\n", unlink->seqnum); | |
1626 | + if (unlink->seqnum == pdu->base.seqnum) { | |
1627 | + dbg_vhci_rx("found pending unlink, %lu\n", | |
1628 | + unlink->seqnum); | |
1629 | + list_del(&unlink->list); | |
1630 | + | |
1631 | + spin_unlock(&vdev->priv_lock); | |
1632 | + return unlink; | |
1633 | + } | |
1634 | + } | |
1635 | + | |
1636 | + spin_unlock(&vdev->priv_lock); | |
1637 | + | |
1638 | + return NULL; | |
1639 | +} | |
1640 | + | |
1641 | + | |
1642 | +static void vhci_recv_ret_unlink(struct vhci_device *vdev, | |
1643 | + struct usbip_header *pdu) | |
1644 | +{ | |
1645 | + struct vhci_unlink *unlink; | |
1646 | + struct urb *urb; | |
1647 | + | |
1648 | + usbip_dump_header(pdu); | |
1649 | + | |
1650 | + unlink = dequeue_pending_unlink(vdev, pdu); | |
1651 | + if (!unlink) { | |
1652 | + uinfo("cannot find the pending unlink %u\n", pdu->base.seqnum); | |
1653 | + return; | |
1654 | + } | |
1655 | + | |
1656 | + urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum); | |
1657 | + if (!urb) { | |
1658 | + /* | |
1659 | + * I get the result of a unlink request. But, it seems that I | |
1660 | + * already received the result of its submit result and gave | |
1661 | + * back the URB. | |
1662 | + */ | |
1663 | + uinfo("the urb (seqnum %d) was already given backed\n", | |
1664 | + pdu->base.seqnum); | |
1665 | + } else { | |
1666 | + dbg_vhci_rx("now giveback urb %p\n", urb); | |
1667 | + | |
1668 | + /* If unlink is succeed, status is -ECONNRESET */ | |
1669 | + urb->status = pdu->u.ret_unlink.status; | |
1670 | + uinfo("%d\n", urb->status); | |
1671 | + | |
1672 | + spin_lock(&the_controller->lock); | |
1673 | + usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb); | |
1674 | + spin_unlock(&the_controller->lock); | |
1675 | + | |
1676 | + usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, | |
1677 | + urb->status); | |
1678 | + } | |
1679 | + | |
1680 | + kfree(unlink); | |
1681 | + | |
1682 | + return; | |
1683 | +} | |
1684 | + | |
1685 | +/* recv a pdu */ | |
1686 | +static void vhci_rx_pdu(struct usbip_device *ud) | |
1687 | +{ | |
1688 | + int ret; | |
1689 | + struct usbip_header pdu; | |
1690 | + struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
1691 | + | |
1692 | + | |
1693 | + dbg_vhci_rx("Enter\n"); | |
1694 | + | |
1695 | + memset(&pdu, 0, sizeof(pdu)); | |
1696 | + | |
1697 | + | |
1698 | + /* 1. receive a pdu header */ | |
1699 | + ret = usbip_xmit(0, ud->tcp_socket, (char *) &pdu, sizeof(pdu), 0); | |
1700 | + if (ret != sizeof(pdu)) { | |
1701 | + uerr("receiving pdu failed! size is %d, should be %d\n", | |
1702 | + ret, sizeof(pdu)); | |
1703 | + usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
1704 | + return; | |
1705 | + } | |
1706 | + | |
1707 | + usbip_header_correct_endian(&pdu, 0); | |
1708 | + | |
1709 | + if (dbg_flag_vhci_rx) | |
1710 | + usbip_dump_header(&pdu); | |
1711 | + | |
1712 | + switch (pdu.base.command) { | |
1713 | + case USBIP_RET_SUBMIT: | |
1714 | + vhci_recv_ret_submit(vdev, &pdu); | |
1715 | + break; | |
1716 | + case USBIP_RET_UNLINK: | |
1717 | + vhci_recv_ret_unlink(vdev, &pdu); | |
1718 | + break; | |
1719 | + default: | |
1720 | + /* NOTREACHED */ | |
1721 | + uerr("unknown pdu %u\n", pdu.base.command); | |
1722 | + usbip_dump_header(&pdu); | |
1723 | + usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
1724 | + } | |
1725 | +} | |
1726 | + | |
1727 | + | |
1728 | +/*-------------------------------------------------------------------------*/ | |
1729 | + | |
1730 | +void vhci_rx_loop(struct usbip_task *ut) | |
1731 | +{ | |
1732 | + struct usbip_device *ud = container_of(ut, struct usbip_device, tcp_rx); | |
1733 | + | |
1734 | + | |
1735 | + while (1) { | |
1736 | + if (signal_pending(current)) { | |
1737 | + dbg_vhci_rx("signal catched!\n"); | |
1738 | + break; | |
1739 | + } | |
1740 | + | |
1741 | + | |
1742 | + if (usbip_event_happend(ud)) | |
1743 | + break; | |
1744 | + | |
1745 | + vhci_rx_pdu(ud); | |
1746 | + } | |
1747 | +} | |
1748 | + | |
1749 | diff --git a/drivers/staging/usbip/vhci_sysfs.c b/drivers/staging/usbip/vhci_sysfs.c | |
1750 | new file mode 100644 | |
1751 | index 0000000..24c2851 | |
1752 | --- /dev/null | |
1753 | +++ b/drivers/staging/usbip/vhci_sysfs.c | |
1754 | @@ -0,0 +1,250 @@ | |
1755 | +/* | |
1756 | + * Copyright (C) 2003-2008 Takahiro Hirofuchi | |
1757 | + * | |
1758 | + * This is free software; you can redistribute it and/or modify | |
1759 | + * it under the terms of the GNU General Public License as published by | |
1760 | + * the Free Software Foundation; either version 2 of the License, or | |
1761 | + * (at your option) any later version. | |
1762 | + * | |
1763 | + * This is distributed in the hope that it will be useful, | |
1764 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
1765 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
1766 | + * GNU General Public License for more details. | |
1767 | + * | |
1768 | + * You should have received a copy of the GNU General Public License | |
1769 | + * along with this program; if not, write to the Free Software | |
1770 | + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
1771 | + * USA. | |
1772 | + */ | |
1773 | + | |
1774 | +#include "usbip_common.h" | |
1775 | +#include "vhci.h" | |
1776 | + | |
1777 | +#include <linux/in.h> | |
1778 | + | |
1779 | +/* TODO: refine locking ?*/ | |
1780 | + | |
1781 | +/* Sysfs entry to show port status */ | |
1782 | +static ssize_t show_status(struct device *dev, struct device_attribute *attr, | |
1783 | + char *out) | |
1784 | +{ | |
1785 | + char *s = out; | |
1786 | + int i = 0; | |
1787 | + | |
1788 | + if (!the_controller || !out) | |
1789 | + BUG(); | |
1790 | + | |
1791 | + spin_lock(&the_controller->lock); | |
1792 | + | |
1793 | + /* | |
1794 | + * output example: | |
1795 | + * prt sta spd dev socket local_busid | |
1796 | + * 000 004 000 000 c5a7bb80 1-2.3 | |
1797 | + * 001 004 000 000 d8cee980 2-3.4 | |
1798 | + * | |
1799 | + * IP address can be retrieved from a socket pointer address by looking | |
1800 | + * up /proc/net/{tcp,tcp6}. Also, a userland program may remember a | |
1801 | + * port number and its peer IP address. | |
1802 | + */ | |
1803 | + out += sprintf(out, "prt sta spd bus dev socket " | |
1804 | + "local_busid\n"); | |
1805 | + | |
1806 | + for (i = 0; i < VHCI_NPORTS; i++) { | |
1807 | + struct vhci_device *vdev = port_to_vdev(i); | |
1808 | + | |
1809 | + spin_lock(&vdev->ud.lock); | |
1810 | + | |
1811 | + out += sprintf(out, "%03u %03u ", i, vdev->ud.status); | |
1812 | + | |
1813 | + if (vdev->ud.status == VDEV_ST_USED) { | |
1814 | + out += sprintf(out, "%03u %08x ", | |
1815 | + vdev->speed, vdev->devid); | |
1816 | + out += sprintf(out, "%16p ", vdev->ud.tcp_socket); | |
1817 | + out += sprintf(out, "%s", vdev->udev->dev.bus_id); | |
1818 | + | |
1819 | + } else | |
1820 | + out += sprintf(out, "000 000 000 0000000000000000 0-0"); | |
1821 | + | |
1822 | + out += sprintf(out, "\n"); | |
1823 | + | |
1824 | + spin_unlock(&vdev->ud.lock); | |
1825 | + } | |
1826 | + | |
1827 | + spin_unlock(&the_controller->lock); | |
1828 | + | |
1829 | + return out - s; | |
1830 | +} | |
1831 | +static DEVICE_ATTR(status, S_IRUGO, show_status, NULL); | |
1832 | + | |
1833 | +/* Sysfs entry to shutdown a virtual connection */ | |
1834 | +static int vhci_port_disconnect(__u32 rhport) | |
1835 | +{ | |
1836 | + struct vhci_device *vdev; | |
1837 | + | |
1838 | + dbg_vhci_sysfs("enter\n"); | |
1839 | + | |
1840 | + /* lock */ | |
1841 | + spin_lock(&the_controller->lock); | |
1842 | + | |
1843 | + vdev = port_to_vdev(rhport); | |
1844 | + | |
1845 | + spin_lock(&vdev->ud.lock); | |
1846 | + if (vdev->ud.status == VDEV_ST_NULL) { | |
1847 | + uerr("not connected %d\n", vdev->ud.status); | |
1848 | + | |
1849 | + /* unlock */ | |
1850 | + spin_unlock(&vdev->ud.lock); | |
1851 | + spin_unlock(&the_controller->lock); | |
1852 | + | |
1853 | + return -EINVAL; | |
1854 | + } | |
1855 | + | |
1856 | + /* unlock */ | |
1857 | + spin_unlock(&vdev->ud.lock); | |
1858 | + spin_unlock(&the_controller->lock); | |
1859 | + | |
1860 | + usbip_event_add(&vdev->ud, VDEV_EVENT_DOWN); | |
1861 | + | |
1862 | + return 0; | |
1863 | +} | |
1864 | + | |
1865 | +static ssize_t store_detach(struct device *dev, struct device_attribute *attr, | |
1866 | + const char *buf, size_t count) | |
1867 | +{ | |
1868 | + int err; | |
1869 | + __u32 rhport = 0; | |
1870 | + | |
1871 | + sscanf(buf, "%u", &rhport); | |
1872 | + | |
1873 | + /* check rhport */ | |
1874 | + if (rhport >= VHCI_NPORTS) { | |
1875 | + uerr("invalid port %u\n", rhport); | |
1876 | + return -EINVAL; | |
1877 | + } | |
1878 | + | |
1879 | + err = vhci_port_disconnect(rhport); | |
1880 | + if (err < 0) | |
1881 | + return -EINVAL; | |
1882 | + | |
1883 | + dbg_vhci_sysfs("Leave\n"); | |
1884 | + return count; | |
1885 | +} | |
1886 | +static DEVICE_ATTR(detach, S_IWUSR, NULL, store_detach); | |
1887 | + | |
1888 | +/* Sysfs entry to establish a virtual connection */ | |
1889 | +static int valid_args(__u32 rhport, enum usb_device_speed speed) | |
1890 | +{ | |
1891 | + /* check rhport */ | |
1892 | + if ((rhport < 0) || (rhport >= VHCI_NPORTS)) { | |
1893 | + uerr("port %u\n", rhport); | |
1894 | + return -EINVAL; | |
1895 | + } | |
1896 | + | |
1897 | + /* check speed */ | |
1898 | + switch (speed) { | |
1899 | + case USB_SPEED_LOW: | |
1900 | + case USB_SPEED_FULL: | |
1901 | + case USB_SPEED_HIGH: | |
1902 | + case USB_SPEED_VARIABLE: | |
1903 | + break; | |
1904 | + default: | |
1905 | + uerr("speed %d\n", speed); | |
1906 | + return -EINVAL; | |
1907 | + } | |
1908 | + | |
1909 | + return 0; | |
1910 | +} | |
1911 | + | |
1912 | +/* | |
1913 | + * To start a new USB/IP attachment, a userland program needs to setup a TCP | |
1914 | + * connection and then write its socket descriptor with remote device | |
1915 | + * information into this sysfs file. | |
1916 | + * | |
1917 | + * A remote device is virtually attached to the root-hub port of @rhport with | |
1918 | + * @speed. @devid is embedded into a request to specify the remote device in a | |
1919 | + * server host. | |
1920 | + * | |
1921 | + * write() returns 0 on success, else negative errno. | |
1922 | + */ | |
1923 | +static ssize_t store_attach(struct device *dev, struct device_attribute *attr, | |
1924 | + const char *buf, size_t count) | |
1925 | +{ | |
1926 | + struct vhci_device *vdev; | |
1927 | + struct socket *socket; | |
1928 | + int sockfd = 0; | |
1929 | + __u32 rhport = 0, devid = 0, speed = 0; | |
1930 | + | |
1931 | + /* | |
1932 | + * @rhport: port number of vhci_hcd | |
1933 | + * @sockfd: socket descriptor of an established TCP connection | |
1934 | + * @devid: unique device identifier in a remote host | |
1935 | + * @speed: usb device speed in a remote host | |
1936 | + */ | |
1937 | + sscanf(buf, "%u %u %u %u", &rhport, &sockfd, &devid, &speed); | |
1938 | + | |
1939 | + dbg_vhci_sysfs("rhport(%u) sockfd(%u) devid(%u) speed(%u)\n", | |
1940 | + rhport, sockfd, devid, speed); | |
1941 | + | |
1942 | + | |
1943 | + /* check received parameters */ | |
1944 | + if (valid_args(rhport, speed) < 0) | |
1945 | + return -EINVAL; | |
1946 | + | |
1947 | + /* check sockfd */ | |
1948 | + socket = sockfd_to_socket(sockfd); | |
1949 | + if (!socket) | |
1950 | + return -EINVAL; | |
1951 | + | |
1952 | + /* now need lock until setting vdev status as used */ | |
1953 | + | |
1954 | + /* begin a lock */ | |
1955 | + spin_lock(&the_controller->lock); | |
1956 | + | |
1957 | + vdev = port_to_vdev(rhport); | |
1958 | + | |
1959 | + spin_lock(&vdev->ud.lock); | |
1960 | + | |
1961 | + if (vdev->ud.status != VDEV_ST_NULL) { | |
1962 | + /* end of the lock */ | |
1963 | + spin_unlock(&vdev->ud.lock); | |
1964 | + spin_unlock(&the_controller->lock); | |
1965 | + | |
1966 | + uerr("port %d already used\n", rhport); | |
1967 | + return -EINVAL; | |
1968 | + } | |
1969 | + | |
1970 | + uinfo("rhport(%u) sockfd(%d) devid(%u) speed(%u)\n", | |
1971 | + rhport, sockfd, devid, speed); | |
1972 | + | |
1973 | + vdev->devid = devid; | |
1974 | + vdev->speed = speed; | |
1975 | + vdev->ud.tcp_socket = socket; | |
1976 | + vdev->ud.status = VDEV_ST_NOTASSIGNED; | |
1977 | + | |
1978 | + spin_unlock(&vdev->ud.lock); | |
1979 | + spin_unlock(&the_controller->lock); | |
1980 | + /* end the lock */ | |
1981 | + | |
1982 | + /* | |
1983 | + * this function will sleep, so should be out of the lock. but, it's ok | |
1984 | + * because we already marked vdev as being used. really? | |
1985 | + */ | |
1986 | + usbip_start_threads(&vdev->ud); | |
1987 | + | |
1988 | + rh_port_connect(rhport, speed); | |
1989 | + | |
1990 | + return count; | |
1991 | +} | |
1992 | +static DEVICE_ATTR(attach, S_IWUSR, NULL, store_attach); | |
1993 | + | |
1994 | +static struct attribute *dev_attrs[] = { | |
1995 | + &dev_attr_status.attr, | |
1996 | + &dev_attr_detach.attr, | |
1997 | + &dev_attr_attach.attr, | |
1998 | + &dev_attr_usbip_debug.attr, | |
1999 | + NULL, | |
2000 | +}; | |
2001 | + | |
2002 | +struct attribute_group dev_attr_group = { | |
2003 | + .attrs = dev_attrs, | |
2004 | +}; | |
2005 | diff --git a/drivers/staging/usbip/vhci_tx.c b/drivers/staging/usbip/vhci_tx.c | |
2006 | new file mode 100644 | |
2007 | index 0000000..1f552a9 | |
2008 | --- /dev/null | |
2009 | +++ b/drivers/staging/usbip/vhci_tx.c | |
2010 | @@ -0,0 +1,239 @@ | |
2011 | +/* | |
2012 | + * Copyright (C) 2003-2008 Takahiro Hirofuchi | |
2013 | + * | |
2014 | + * This is free software; you can redistribute it and/or modify | |
2015 | + * it under the terms of the GNU General Public License as published by | |
2016 | + * the Free Software Foundation; either version 2 of the License, or | |
2017 | + * (at your option) any later version. | |
2018 | + * | |
2019 | + * This is distributed in the hope that it will be useful, | |
2020 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
2021 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
2022 | + * GNU General Public License for more details. | |
2023 | + * | |
2024 | + * You should have received a copy of the GNU General Public License | |
2025 | + * along with this program; if not, write to the Free Software | |
2026 | + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
2027 | + * USA. | |
2028 | + */ | |
2029 | + | |
2030 | +#include "usbip_common.h" | |
2031 | +#include "vhci.h" | |
2032 | + | |
2033 | + | |
2034 | +static void setup_cmd_submit_pdu(struct usbip_header *pdup, struct urb *urb) | |
2035 | +{ | |
2036 | + struct vhci_priv *priv = ((struct vhci_priv *)urb->hcpriv); | |
2037 | + struct vhci_device *vdev = priv->vdev; | |
2038 | + | |
2039 | + dbg_vhci_tx("URB, local devnum %u, remote devid %u\n", | |
2040 | + usb_pipedevice(urb->pipe), vdev->devid); | |
2041 | + | |
2042 | + pdup->base.command = USBIP_CMD_SUBMIT; | |
2043 | + pdup->base.seqnum = priv->seqnum; | |
2044 | + pdup->base.devid = vdev->devid; | |
2045 | + if (usb_pipein(urb->pipe)) | |
2046 | + pdup->base.direction = USBIP_DIR_IN; | |
2047 | + else | |
2048 | + pdup->base.direction = USBIP_DIR_OUT; | |
2049 | + pdup->base.ep = usb_pipeendpoint(urb->pipe); | |
2050 | + | |
2051 | + usbip_pack_pdu(pdup, urb, USBIP_CMD_SUBMIT, 1); | |
2052 | + | |
2053 | + if (urb->setup_packet) | |
2054 | + memcpy(pdup->u.cmd_submit.setup, urb->setup_packet, 8); | |
2055 | +} | |
2056 | + | |
2057 | +static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev) | |
2058 | +{ | |
2059 | + unsigned long flags; | |
2060 | + struct vhci_priv *priv, *tmp; | |
2061 | + | |
2062 | + spin_lock_irqsave(&vdev->priv_lock, flags); | |
2063 | + | |
2064 | + list_for_each_entry_safe(priv, tmp, &vdev->priv_tx, list) { | |
2065 | + list_move_tail(&priv->list, &vdev->priv_rx); | |
2066 | + spin_unlock_irqrestore(&vdev->priv_lock, flags); | |
2067 | + return priv; | |
2068 | + } | |
2069 | + | |
2070 | + spin_unlock_irqrestore(&vdev->priv_lock, flags); | |
2071 | + | |
2072 | + return NULL; | |
2073 | +} | |
2074 | + | |
2075 | + | |
2076 | + | |
2077 | +static int vhci_send_cmd_submit(struct vhci_device *vdev) | |
2078 | +{ | |
2079 | + struct vhci_priv *priv = NULL; | |
2080 | + | |
2081 | + struct msghdr msg; | |
2082 | + struct kvec iov[3]; | |
2083 | + size_t txsize; | |
2084 | + | |
2085 | + size_t total_size = 0; | |
2086 | + | |
2087 | + while ((priv = dequeue_from_priv_tx(vdev)) != NULL) { | |
2088 | + int ret; | |
2089 | + struct urb *urb = priv->urb; | |
2090 | + struct usbip_header pdu_header; | |
2091 | + void *iso_buffer = NULL; | |
2092 | + | |
2093 | + txsize = 0; | |
2094 | + memset(&pdu_header, 0, sizeof(pdu_header)); | |
2095 | + memset(&msg, 0, sizeof(msg)); | |
2096 | + memset(&iov, 0, sizeof(iov)); | |
2097 | + | |
2098 | + dbg_vhci_tx("setup txdata urb %p\n", urb); | |
2099 | + | |
2100 | + | |
2101 | + /* 1. setup usbip_header */ | |
2102 | + setup_cmd_submit_pdu(&pdu_header, urb); | |
2103 | + usbip_header_correct_endian(&pdu_header, 1); | |
2104 | + | |
2105 | + iov[0].iov_base = &pdu_header; | |
2106 | + iov[0].iov_len = sizeof(pdu_header); | |
2107 | + txsize += sizeof(pdu_header); | |
2108 | + | |
2109 | + /* 2. setup transfer buffer */ | |
2110 | + if (!usb_pipein(urb->pipe) && urb->transfer_buffer_length > 0) { | |
2111 | + iov[1].iov_base = urb->transfer_buffer; | |
2112 | + iov[1].iov_len = urb->transfer_buffer_length; | |
2113 | + txsize += urb->transfer_buffer_length; | |
2114 | + } | |
2115 | + | |
2116 | + /* 3. setup iso_packet_descriptor */ | |
2117 | + if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
2118 | + ssize_t len = 0; | |
2119 | + | |
2120 | + iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len); | |
2121 | + if (!iso_buffer) { | |
2122 | + usbip_event_add(&vdev->ud, | |
2123 | + SDEV_EVENT_ERROR_MALLOC); | |
2124 | + return -1; | |
2125 | + } | |
2126 | + | |
2127 | + iov[2].iov_base = iso_buffer; | |
2128 | + iov[2].iov_len = len; | |
2129 | + txsize += len; | |
2130 | + } | |
2131 | + | |
2132 | + ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 3, txsize); | |
2133 | + if (ret != txsize) { | |
2134 | + uerr("sendmsg failed!, retval %d for %zd\n", ret, | |
2135 | + txsize); | |
2136 | + kfree(iso_buffer); | |
2137 | + usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP); | |
2138 | + return -1; | |
2139 | + } | |
2140 | + | |
2141 | + kfree(iso_buffer); | |
2142 | + dbg_vhci_tx("send txdata\n"); | |
2143 | + | |
2144 | + total_size += txsize; | |
2145 | + } | |
2146 | + | |
2147 | + return total_size; | |
2148 | +} | |
2149 | + | |
2150 | + | |
2151 | +/*-------------------------------------------------------------------------*/ | |
2152 | + | |
2153 | +static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev) | |
2154 | +{ | |
2155 | + unsigned long flags; | |
2156 | + struct vhci_unlink *unlink, *tmp; | |
2157 | + | |
2158 | + spin_lock_irqsave(&vdev->priv_lock, flags); | |
2159 | + | |
2160 | + list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { | |
2161 | + list_move_tail(&unlink->list, &vdev->unlink_rx); | |
2162 | + spin_unlock_irqrestore(&vdev->priv_lock, flags); | |
2163 | + return unlink; | |
2164 | + } | |
2165 | + | |
2166 | + spin_unlock_irqrestore(&vdev->priv_lock, flags); | |
2167 | + | |
2168 | + return NULL; | |
2169 | +} | |
2170 | + | |
2171 | +static int vhci_send_cmd_unlink(struct vhci_device *vdev) | |
2172 | +{ | |
2173 | + struct vhci_unlink *unlink = NULL; | |
2174 | + | |
2175 | + struct msghdr msg; | |
2176 | + struct kvec iov[3]; | |
2177 | + size_t txsize; | |
2178 | + | |
2179 | + size_t total_size = 0; | |
2180 | + | |
2181 | + while ((unlink = dequeue_from_unlink_tx(vdev)) != NULL) { | |
2182 | + int ret; | |
2183 | + struct usbip_header pdu_header; | |
2184 | + | |
2185 | + txsize = 0; | |
2186 | + memset(&pdu_header, 0, sizeof(pdu_header)); | |
2187 | + memset(&msg, 0, sizeof(msg)); | |
2188 | + memset(&iov, 0, sizeof(iov)); | |
2189 | + | |
2190 | + dbg_vhci_tx("setup cmd unlink, %lu \n", unlink->seqnum); | |
2191 | + | |
2192 | + | |
2193 | + /* 1. setup usbip_header */ | |
2194 | + pdu_header.base.command = USBIP_CMD_UNLINK; | |
2195 | + pdu_header.base.seqnum = unlink->seqnum; | |
2196 | + pdu_header.base.devid = vdev->devid; | |
2197 | + pdu_header.base.ep = 0; | |
2198 | + pdu_header.u.cmd_unlink.seqnum = unlink->unlink_seqnum; | |
2199 | + | |
2200 | + usbip_header_correct_endian(&pdu_header, 1); | |
2201 | + | |
2202 | + iov[0].iov_base = &pdu_header; | |
2203 | + iov[0].iov_len = sizeof(pdu_header); | |
2204 | + txsize += sizeof(pdu_header); | |
2205 | + | |
2206 | + ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 1, txsize); | |
2207 | + if (ret != txsize) { | |
2208 | + uerr("sendmsg failed!, retval %d for %zd\n", ret, | |
2209 | + txsize); | |
2210 | + usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP); | |
2211 | + return -1; | |
2212 | + } | |
2213 | + | |
2214 | + | |
2215 | + dbg_vhci_tx("send txdata\n"); | |
2216 | + | |
2217 | + total_size += txsize; | |
2218 | + } | |
2219 | + | |
2220 | + return total_size; | |
2221 | +} | |
2222 | + | |
2223 | + | |
2224 | +/*-------------------------------------------------------------------------*/ | |
2225 | + | |
2226 | +void vhci_tx_loop(struct usbip_task *ut) | |
2227 | +{ | |
2228 | + struct usbip_device *ud = container_of(ut, struct usbip_device, tcp_tx); | |
2229 | + struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
2230 | + | |
2231 | + while (1) { | |
2232 | + if (signal_pending(current)) { | |
2233 | + uinfo("vhci_tx signal catched\n"); | |
2234 | + break; | |
2235 | + } | |
2236 | + | |
2237 | + if (vhci_send_cmd_submit(vdev) < 0) | |
2238 | + break; | |
2239 | + | |
2240 | + if (vhci_send_cmd_unlink(vdev) < 0) | |
2241 | + break; | |
2242 | + | |
2243 | + wait_event_interruptible(vdev->waitq_tx, | |
2244 | + (!list_empty(&vdev->priv_tx) || | |
2245 | + !list_empty(&vdev->unlink_tx))); | |
2246 | + | |
2247 | + dbg_vhci_tx("pending urbs ?, now wake up\n"); | |
2248 | + } | |
2249 | +} | |
2250 | -- | |
2251 | 1.6.0.2 | |
2252 |