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dt-bindings: mtd: ingenic: Use standard ecc-engine property
[linux/fpc-iii.git] / drivers / usb / usbip / vhci_hcd.c
blobf46ee1fefe02224dce6f425bab2f3eb6bbc7680d
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2003-2008 Takahiro Hirofuchi
4 * Copyright (C) 2015-2016 Nobuo Iwata
5 */
6
7 #include <linux/init.h>
8 #include <linux/file.h>
9 #include <linux/kernel.h>
10 #include <linux/kthread.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/slab.h>
14
15 #include "usbip_common.h"
16 #include "vhci.h"
17
18 #define DRIVER_AUTHOR "Takahiro Hirofuchi"
19 #define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver"
20
21 /*
22 * TODO
23 * - update root hub emulation
24 * - move the emulation code to userland ?
25 * porting to other operating systems
26 * minimize kernel code
27 * - add suspend/resume code
28 * - clean up everything
29 */
30
31 /* See usb gadget dummy hcd */
32
33 static int vhci_hub_status(struct usb_hcd *hcd, char *buff);
34 static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
35 u16 wIndex, char *buff, u16 wLength);
36 static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
37 gfp_t mem_flags);
38 static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
39 static int vhci_start(struct usb_hcd *vhci_hcd);
40 static void vhci_stop(struct usb_hcd *hcd);
41 static int vhci_get_frame_number(struct usb_hcd *hcd);
42
43 static const char driver_name[] = "vhci_hcd";
44 static const char driver_desc[] = "USB/IP Virtual Host Controller";
45
46 int vhci_num_controllers = VHCI_NR_HCS;
47 struct vhci *vhcis;
48
49 static const char * const bit_desc[] = {
50 "CONNECTION", /*0*/
51 "ENABLE", /*1*/
52 "SUSPEND", /*2*/
53 "OVER_CURRENT", /*3*/
54 "RESET", /*4*/
55 "L1", /*5*/
56 "R6", /*6*/
57 "R7", /*7*/
58 "POWER", /*8*/
59 "LOWSPEED", /*9*/
60 "HIGHSPEED", /*10*/
61 "PORT_TEST", /*11*/
62 "INDICATOR", /*12*/
63 "R13", /*13*/
64 "R14", /*14*/
65 "R15", /*15*/
66 "C_CONNECTION", /*16*/
67 "C_ENABLE", /*17*/
68 "C_SUSPEND", /*18*/
69 "C_OVER_CURRENT", /*19*/
70 "C_RESET", /*20*/
71 "C_L1", /*21*/
72 "R22", /*22*/
73 "R23", /*23*/
74 "R24", /*24*/
75 "R25", /*25*/
76 "R26", /*26*/
77 "R27", /*27*/
78 "R28", /*28*/
79 "R29", /*29*/
80 "R30", /*30*/
81 "R31", /*31*/
82 };
83
84 static const char * const bit_desc_ss[] = {
85 "CONNECTION", /*0*/
86 "ENABLE", /*1*/
87 "SUSPEND", /*2*/
88 "OVER_CURRENT", /*3*/
89 "RESET", /*4*/
90 "L1", /*5*/
91 "R6", /*6*/
92 "R7", /*7*/
93 "R8", /*8*/
94 "POWER", /*9*/
95 "HIGHSPEED", /*10*/
96 "PORT_TEST", /*11*/
97 "INDICATOR", /*12*/
98 "R13", /*13*/
99 "R14", /*14*/
100 "R15", /*15*/
101 "C_CONNECTION", /*16*/
102 "C_ENABLE", /*17*/
103 "C_SUSPEND", /*18*/
104 "C_OVER_CURRENT", /*19*/
105 "C_RESET", /*20*/
106 "C_BH_RESET", /*21*/
107 "C_LINK_STATE", /*22*/
108 "C_CONFIG_ERROR", /*23*/
109 "R24", /*24*/
110 "R25", /*25*/
111 "R26", /*26*/
112 "R27", /*27*/
113 "R28", /*28*/
114 "R29", /*29*/
115 "R30", /*30*/
116 "R31", /*31*/
117 };
118
119 static void dump_port_status_diff(u32 prev_status, u32 new_status, bool usb3)
120 {
121 int i = 0;
122 u32 bit = 1;
123 const char * const *desc = bit_desc;
124
125 if (usb3)
126 desc = bit_desc_ss;
127
128 pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status);
129 while (bit) {
130 u32 prev = prev_status & bit;
131 u32 new = new_status & bit;
132 char change;
133
134 if (!prev && new)
135 change = '+';
136 else if (prev && !new)
137 change = '-';
138 else
139 change = ' ';
140
141 if (prev || new) {
142 pr_debug(" %c%s\n", change, desc[i]);
143
144 if (bit == 1) /* USB_PORT_STAT_CONNECTION */
145 pr_debug(" %c%s\n", change, "USB_PORT_STAT_SPEED_5GBPS");
146 }
147 bit <<= 1;
148 i++;
149 }
150 pr_debug("\n");
151 }
152
153 void rh_port_connect(struct vhci_device *vdev, enum usb_device_speed speed)
154 {
155 struct vhci_hcd *vhci_hcd = vdev_to_vhci_hcd(vdev);
156 struct vhci *vhci = vhci_hcd->vhci;
157 int rhport = vdev->rhport;
158 u32 status;
159 unsigned long flags;
160
161 usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport);
162
163 spin_lock_irqsave(&vhci->lock, flags);
164
165 status = vhci_hcd->port_status[rhport];
166
167 status |= USB_PORT_STAT_CONNECTION | (1 << USB_PORT_FEAT_C_CONNECTION);
168
169 switch (speed) {
170 case USB_SPEED_HIGH:
171 status |= USB_PORT_STAT_HIGH_SPEED;
172 break;
173 case USB_SPEED_LOW:
174 status |= USB_PORT_STAT_LOW_SPEED;
175 break;
176 default:
177 break;
178 }
179
180 vhci_hcd->port_status[rhport] = status;
181
182 spin_unlock_irqrestore(&vhci->lock, flags);
183
184 usb_hcd_poll_rh_status(vhci_hcd_to_hcd(vhci_hcd));
185 }
186
187 static void rh_port_disconnect(struct vhci_device *vdev)
188 {
189 struct vhci_hcd *vhci_hcd = vdev_to_vhci_hcd(vdev);
190 struct vhci *vhci = vhci_hcd->vhci;
191 int rhport = vdev->rhport;
192 u32 status;
193 unsigned long flags;
194
195 usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport);
196
197 spin_lock_irqsave(&vhci->lock, flags);
198
199 status = vhci_hcd->port_status[rhport];
200
201 status &= ~USB_PORT_STAT_CONNECTION;
202 status |= (1 << USB_PORT_FEAT_C_CONNECTION);
203
204 vhci_hcd->port_status[rhport] = status;
205
206 spin_unlock_irqrestore(&vhci->lock, flags);
207 usb_hcd_poll_rh_status(vhci_hcd_to_hcd(vhci_hcd));
208 }
209
210 #define PORT_C_MASK \
211 ((USB_PORT_STAT_C_CONNECTION \
212 | USB_PORT_STAT_C_ENABLE \
213 | USB_PORT_STAT_C_SUSPEND \
214 | USB_PORT_STAT_C_OVERCURRENT \
215 | USB_PORT_STAT_C_RESET) << 16)
216
217 /*
218 * Returns 0 if the status hasn't changed, or the number of bytes in buf.
219 * Ports are 0-indexed from the HCD point of view,
220 * and 1-indexed from the USB core pointer of view.
221 *
222 * @buf: a bitmap to show which port status has been changed.
223 * bit 0: reserved
224 * bit 1: the status of port 0 has been changed.
225 * bit 2: the status of port 1 has been changed.
226 * ...
227 */
228 static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
229 {
230 struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd);
231 struct vhci *vhci = vhci_hcd->vhci;
232 int retval = DIV_ROUND_UP(VHCI_HC_PORTS + 1, 8);
233 int rhport;
234 int changed = 0;
235 unsigned long flags;
236
237 memset(buf, 0, retval);
238
239 spin_lock_irqsave(&vhci->lock, flags);
240 if (!HCD_HW_ACCESSIBLE(hcd)) {
241 usbip_dbg_vhci_rh("hw accessible flag not on?\n");
242 goto done;
243 }
244
245 /* check pseudo status register for each port */
246 for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
247 if ((vhci_hcd->port_status[rhport] & PORT_C_MASK)) {
248 /* The status of a port has been changed, */
249 usbip_dbg_vhci_rh("port %d status changed\n", rhport);
250
251 buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8;
252 changed = 1;
253 }
254 }
255
256 if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1))
257 usb_hcd_resume_root_hub(hcd);
258
259 done:
260 spin_unlock_irqrestore(&vhci->lock, flags);
261 return changed ? retval : 0;
262 }
263
264 /* usb 3.0 root hub device descriptor */
265 static struct {
266 struct usb_bos_descriptor bos;
267 struct usb_ss_cap_descriptor ss_cap;
268 } __packed usb3_bos_desc = {
269
270 .bos = {
271 .bLength = USB_DT_BOS_SIZE,
272 .bDescriptorType = USB_DT_BOS,
273 .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
274 .bNumDeviceCaps = 1,
275 },
276 .ss_cap = {
277 .bLength = USB_DT_USB_SS_CAP_SIZE,
278 .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
279 .bDevCapabilityType = USB_SS_CAP_TYPE,
280 .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
281 .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
282 },
283 };
284
285 static inline void
286 ss_hub_descriptor(struct usb_hub_descriptor *desc)
287 {
288 memset(desc, 0, sizeof *desc);
289 desc->bDescriptorType = USB_DT_SS_HUB;
290 desc->bDescLength = 12;
291 desc->wHubCharacteristics = cpu_to_le16(
292 HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_COMMON_OCPM);
293 desc->bNbrPorts = VHCI_HC_PORTS;
294 desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
295 desc->u.ss.DeviceRemovable = 0xffff;
296 }
297
298 static inline void hub_descriptor(struct usb_hub_descriptor *desc)
299 {
300 int width;
301
302 memset(desc, 0, sizeof(*desc));
303 desc->bDescriptorType = USB_DT_HUB;
304 desc->wHubCharacteristics = cpu_to_le16(
305 HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_COMMON_OCPM);
306
307 desc->bNbrPorts = VHCI_HC_PORTS;
308 BUILD_BUG_ON(VHCI_HC_PORTS > USB_MAXCHILDREN);
309 width = desc->bNbrPorts / 8 + 1;
310 desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * width;
311 memset(&desc->u.hs.DeviceRemovable[0], 0, width);
312 memset(&desc->u.hs.DeviceRemovable[width], 0xff, width);
313 }
314
315 static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
316 u16 wIndex, char *buf, u16 wLength)
317 {
318 struct vhci_hcd *vhci_hcd;
319 struct vhci *vhci;
320 int retval = 0;
321 int rhport = -1;
322 unsigned long flags;
323 bool invalid_rhport = false;
324
325 u32 prev_port_status[VHCI_HC_PORTS];
326
327 if (!HCD_HW_ACCESSIBLE(hcd))
328 return -ETIMEDOUT;
329
330 /*
331 * NOTE:
332 * wIndex (bits 0-7) shows the port number and begins from 1?
333 */
334 wIndex = ((__u8)(wIndex & 0x00ff));
335 usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue,
336 wIndex);
337
338 /*
339 * wIndex can be 0 for some request types (typeReq). rhport is
340 * in valid range when wIndex >= 1 and < VHCI_HC_PORTS.
341 *
342 * Reference port_status[] only with valid rhport when
343 * invalid_rhport is false.
344 */
345 if (wIndex < 1 || wIndex > VHCI_HC_PORTS) {
346 invalid_rhport = true;
347 if (wIndex > VHCI_HC_PORTS)
348 pr_err("invalid port number %d\n", wIndex);
349 } else
350 rhport = wIndex - 1;
351
352 vhci_hcd = hcd_to_vhci_hcd(hcd);
353 vhci = vhci_hcd->vhci;
354
355 spin_lock_irqsave(&vhci->lock, flags);
356
357 /* store old status and compare now and old later */
358 if (usbip_dbg_flag_vhci_rh) {
359 if (!invalid_rhport)
360 memcpy(prev_port_status, vhci_hcd->port_status,
361 sizeof(prev_port_status));
362 }
363
364 switch (typeReq) {
365 case ClearHubFeature:
366 usbip_dbg_vhci_rh(" ClearHubFeature\n");
367 break;
368 case ClearPortFeature:
369 if (invalid_rhport) {
370 pr_err("invalid port number %d\n", wIndex);
371 goto error;
372 }
373 switch (wValue) {
374 case USB_PORT_FEAT_SUSPEND:
375 if (hcd->speed == HCD_USB3) {
376 pr_err(" ClearPortFeature: USB_PORT_FEAT_SUSPEND req not "
377 "supported for USB 3.0 roothub\n");
378 goto error;
379 }
380 usbip_dbg_vhci_rh(
381 " ClearPortFeature: USB_PORT_FEAT_SUSPEND\n");
382 if (vhci_hcd->port_status[rhport] & USB_PORT_STAT_SUSPEND) {
383 /* 20msec signaling */
384 vhci_hcd->resuming = 1;
385 vhci_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
386 }
387 break;
388 case USB_PORT_FEAT_POWER:
389 usbip_dbg_vhci_rh(
390 " ClearPortFeature: USB_PORT_FEAT_POWER\n");
391 if (hcd->speed == HCD_USB3)
392 vhci_hcd->port_status[rhport] &= ~USB_SS_PORT_STAT_POWER;
393 else
394 vhci_hcd->port_status[rhport] &= ~USB_PORT_STAT_POWER;
395 break;
396 default:
397 usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n",
398 wValue);
399 vhci_hcd->port_status[rhport] &= ~(1 << wValue);
400 break;
401 }
402 break;
403 case GetHubDescriptor:
404 usbip_dbg_vhci_rh(" GetHubDescriptor\n");
405 if (hcd->speed == HCD_USB3 &&
406 (wLength < USB_DT_SS_HUB_SIZE ||
407 wValue != (USB_DT_SS_HUB << 8))) {
408 pr_err("Wrong hub descriptor type for USB 3.0 roothub.\n");
409 goto error;
410 }
411 if (hcd->speed == HCD_USB3)
412 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
413 else
414 hub_descriptor((struct usb_hub_descriptor *) buf);
415 break;
416 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
417 if (hcd->speed != HCD_USB3)
418 goto error;
419
420 if ((wValue >> 8) != USB_DT_BOS)
421 goto error;
422
423 memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
424 retval = sizeof(usb3_bos_desc);
425 break;
426 case GetHubStatus:
427 usbip_dbg_vhci_rh(" GetHubStatus\n");
428 *(__le32 *) buf = cpu_to_le32(0);
429 break;
430 case GetPortStatus:
431 usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex);
432 if (invalid_rhport) {
433 pr_err("invalid port number %d\n", wIndex);
434 retval = -EPIPE;
435 goto error;
436 }
437
438 /* we do not care about resume. */
439
440 /* whoever resets or resumes must GetPortStatus to
441 * complete it!!
442 */
443 if (vhci_hcd->resuming && time_after(jiffies, vhci_hcd->re_timeout)) {
444 vhci_hcd->port_status[rhport] |= (1 << USB_PORT_FEAT_C_SUSPEND);
445 vhci_hcd->port_status[rhport] &= ~(1 << USB_PORT_FEAT_SUSPEND);
446 vhci_hcd->resuming = 0;
447 vhci_hcd->re_timeout = 0;
448 }
449
450 if ((vhci_hcd->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) !=
451 0 && time_after(jiffies, vhci_hcd->re_timeout)) {
452 vhci_hcd->port_status[rhport] |= (1 << USB_PORT_FEAT_C_RESET);
453 vhci_hcd->port_status[rhport] &= ~(1 << USB_PORT_FEAT_RESET);
454 vhci_hcd->re_timeout = 0;
455
456 if (vhci_hcd->vdev[rhport].ud.status ==
457 VDEV_ST_NOTASSIGNED) {
458 usbip_dbg_vhci_rh(
459 " enable rhport %d (status %u)\n",
460 rhport,
461 vhci_hcd->vdev[rhport].ud.status);
462 vhci_hcd->port_status[rhport] |=
463 USB_PORT_STAT_ENABLE;
464 }
465
466 if (hcd->speed < HCD_USB3) {
467 switch (vhci_hcd->vdev[rhport].speed) {
468 case USB_SPEED_HIGH:
469 vhci_hcd->port_status[rhport] |=
470 USB_PORT_STAT_HIGH_SPEED;
471 break;
472 case USB_SPEED_LOW:
473 vhci_hcd->port_status[rhport] |=
474 USB_PORT_STAT_LOW_SPEED;
475 break;
476 default:
477 pr_err("vhci_device speed not set\n");
478 break;
479 }
480 }
481 }
482 ((__le16 *) buf)[0] = cpu_to_le16(vhci_hcd->port_status[rhport]);
483 ((__le16 *) buf)[1] =
484 cpu_to_le16(vhci_hcd->port_status[rhport] >> 16);
485
486 usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0],
487 ((u16 *)buf)[1]);
488 break;
489 case SetHubFeature:
490 usbip_dbg_vhci_rh(" SetHubFeature\n");
491 retval = -EPIPE;
492 break;
493 case SetPortFeature:
494 switch (wValue) {
495 case USB_PORT_FEAT_LINK_STATE:
496 usbip_dbg_vhci_rh(
497 " SetPortFeature: USB_PORT_FEAT_LINK_STATE\n");
498 if (hcd->speed != HCD_USB3) {
499 pr_err("USB_PORT_FEAT_LINK_STATE req not "
500 "supported for USB 2.0 roothub\n");
501 goto error;
502 }
503 /*
504 * Since this is dummy we don't have an actual link so
505 * there is nothing to do for the SET_LINK_STATE cmd
506 */
507 break;
508 case USB_PORT_FEAT_U1_TIMEOUT:
509 usbip_dbg_vhci_rh(
510 " SetPortFeature: USB_PORT_FEAT_U1_TIMEOUT\n");
511 case USB_PORT_FEAT_U2_TIMEOUT:
512 usbip_dbg_vhci_rh(
513 " SetPortFeature: USB_PORT_FEAT_U2_TIMEOUT\n");
514 /* TODO: add suspend/resume support! */
515 if (hcd->speed != HCD_USB3) {
516 pr_err("USB_PORT_FEAT_U1/2_TIMEOUT req not "
517 "supported for USB 2.0 roothub\n");
518 goto error;
519 }
520 break;
521 case USB_PORT_FEAT_SUSPEND:
522 usbip_dbg_vhci_rh(
523 " SetPortFeature: USB_PORT_FEAT_SUSPEND\n");
524 /* Applicable only for USB2.0 hub */
525 if (hcd->speed == HCD_USB3) {
526 pr_err("USB_PORT_FEAT_SUSPEND req not "
527 "supported for USB 3.0 roothub\n");
528 goto error;
529 }
530
531 if (invalid_rhport) {
532 pr_err("invalid port number %d\n", wIndex);
533 goto error;
534 }
535
536 vhci_hcd->port_status[rhport] |= USB_PORT_STAT_SUSPEND;
537 break;
538 case USB_PORT_FEAT_POWER:
539 usbip_dbg_vhci_rh(
540 " SetPortFeature: USB_PORT_FEAT_POWER\n");
541 if (invalid_rhport) {
542 pr_err("invalid port number %d\n", wIndex);
543 goto error;
544 }
545 if (hcd->speed == HCD_USB3)
546 vhci_hcd->port_status[rhport] |= USB_SS_PORT_STAT_POWER;
547 else
548 vhci_hcd->port_status[rhport] |= USB_PORT_STAT_POWER;
549 break;
550 case USB_PORT_FEAT_BH_PORT_RESET:
551 usbip_dbg_vhci_rh(
552 " SetPortFeature: USB_PORT_FEAT_BH_PORT_RESET\n");
553 if (invalid_rhport) {
554 pr_err("invalid port number %d\n", wIndex);
555 goto error;
556 }
557 /* Applicable only for USB3.0 hub */
558 if (hcd->speed != HCD_USB3) {
559 pr_err("USB_PORT_FEAT_BH_PORT_RESET req not "
560 "supported for USB 2.0 roothub\n");
561 goto error;
562 }
563 /* FALLS THROUGH */
564 case USB_PORT_FEAT_RESET:
565 usbip_dbg_vhci_rh(
566 " SetPortFeature: USB_PORT_FEAT_RESET\n");
567 if (invalid_rhport) {
568 pr_err("invalid port number %d\n", wIndex);
569 goto error;
570 }
571 /* if it's already enabled, disable */
572 if (hcd->speed == HCD_USB3) {
573 vhci_hcd->port_status[rhport] = 0;
574 vhci_hcd->port_status[rhport] =
575 (USB_SS_PORT_STAT_POWER |
576 USB_PORT_STAT_CONNECTION |
577 USB_PORT_STAT_RESET);
578 } else if (vhci_hcd->port_status[rhport] & USB_PORT_STAT_ENABLE) {
579 vhci_hcd->port_status[rhport] &= ~(USB_PORT_STAT_ENABLE
580 | USB_PORT_STAT_LOW_SPEED
581 | USB_PORT_STAT_HIGH_SPEED);
582 }
583
584 /* 50msec reset signaling */
585 vhci_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
586
587 /* FALLS THROUGH */
588 default:
589 usbip_dbg_vhci_rh(" SetPortFeature: default %d\n",
590 wValue);
591 if (invalid_rhport) {
592 pr_err("invalid port number %d\n", wIndex);
593 goto error;
594 }
595 if (hcd->speed == HCD_USB3) {
596 if ((vhci_hcd->port_status[rhport] &
597 USB_SS_PORT_STAT_POWER) != 0) {
598 vhci_hcd->port_status[rhport] |= (1 << wValue);
599 }
600 } else
601 if ((vhci_hcd->port_status[rhport] &
602 USB_PORT_STAT_POWER) != 0) {
603 vhci_hcd->port_status[rhport] |= (1 << wValue);
604 }
605 }
606 break;
607 case GetPortErrorCount:
608 usbip_dbg_vhci_rh(" GetPortErrorCount\n");
609 if (hcd->speed != HCD_USB3) {
610 pr_err("GetPortErrorCount req not "
611 "supported for USB 2.0 roothub\n");
612 goto error;
613 }
614 /* We'll always return 0 since this is a dummy hub */
615 *(__le32 *) buf = cpu_to_le32(0);
616 break;
617 case SetHubDepth:
618 usbip_dbg_vhci_rh(" SetHubDepth\n");
619 if (hcd->speed != HCD_USB3) {
620 pr_err("SetHubDepth req not supported for "
621 "USB 2.0 roothub\n");
622 goto error;
623 }
624 break;
625 default:
626 pr_err("default hub control req: %04x v%04x i%04x l%d\n",
627 typeReq, wValue, wIndex, wLength);
628 error:
629 /* "protocol stall" on error */
630 retval = -EPIPE;
631 }
632
633 if (usbip_dbg_flag_vhci_rh) {
634 pr_debug("port %d\n", rhport);
635 /* Only dump valid port status */
636 if (!invalid_rhport) {
637 dump_port_status_diff(prev_port_status[rhport],
638 vhci_hcd->port_status[rhport],
639 hcd->speed == HCD_USB3);
640 }
641 }
642 usbip_dbg_vhci_rh(" bye\n");
643
644 spin_unlock_irqrestore(&vhci->lock, flags);
645
646 if (!invalid_rhport &&
647 (vhci_hcd->port_status[rhport] & PORT_C_MASK) != 0) {
648 usb_hcd_poll_rh_status(hcd);
649 }
650
651 return retval;
652 }
653
654 static void vhci_tx_urb(struct urb *urb, struct vhci_device *vdev)
655 {
656 struct vhci_priv *priv;
657 struct vhci_hcd *vhci_hcd;
658 unsigned long flags;
659
660 if (!vdev) {
661 pr_err("could not get virtual device");
662 return;
663 }
664 vhci_hcd = vdev_to_vhci_hcd(vdev);
665
666 priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC);
667 if (!priv) {
668 usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
669 return;
670 }
671
672 spin_lock_irqsave(&vdev->priv_lock, flags);
673
674 priv->seqnum = atomic_inc_return(&vhci_hcd->seqnum);
675 if (priv->seqnum == 0xffff)
676 dev_info(&urb->dev->dev, "seqnum max\n");
677
678 priv->vdev = vdev;
679 priv->urb = urb;
680
681 urb->hcpriv = (void *) priv;
682
683 list_add_tail(&priv->list, &vdev->priv_tx);
684
685 wake_up(&vdev->waitq_tx);
686 spin_unlock_irqrestore(&vdev->priv_lock, flags);
687 }
688
689 static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
690 {
691 struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd);
692 struct vhci *vhci = vhci_hcd->vhci;
693 struct device *dev = &urb->dev->dev;
694 u8 portnum = urb->dev->portnum;
695 int ret = 0;
696 struct vhci_device *vdev;
697 unsigned long flags;
698
699 if (portnum > VHCI_HC_PORTS) {
700 pr_err("invalid port number %d\n", portnum);
701 return -ENODEV;
702 }
703 vdev = &vhci_hcd->vdev[portnum-1];
704
705 if (!urb->transfer_buffer && urb->transfer_buffer_length) {
706 dev_dbg(dev, "Null URB transfer buffer\n");
707 return -EINVAL;
708 }
709
710 spin_lock_irqsave(&vhci->lock, flags);
711
712 if (urb->status != -EINPROGRESS) {
713 dev_err(dev, "URB already unlinked!, status %d\n", urb->status);
714 spin_unlock_irqrestore(&vhci->lock, flags);
715 return urb->status;
716 }
717
718 /* refuse enqueue for dead connection */
719 spin_lock(&vdev->ud.lock);
720 if (vdev->ud.status == VDEV_ST_NULL ||
721 vdev->ud.status == VDEV_ST_ERROR) {
722 dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport);
723 spin_unlock(&vdev->ud.lock);
724 spin_unlock_irqrestore(&vhci->lock, flags);
725 return -ENODEV;
726 }
727 spin_unlock(&vdev->ud.lock);
728
729 ret = usb_hcd_link_urb_to_ep(hcd, urb);
730 if (ret)
731 goto no_need_unlink;
732
733 /*
734 * The enumeration process is as follows;
735 *
736 * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0)
737 * to get max packet length of default pipe
738 *
739 * 2. Set_Address request to DevAddr(0) EndPoint(0)
740 *
741 */
742 if (usb_pipedevice(urb->pipe) == 0) {
743 __u8 type = usb_pipetype(urb->pipe);
744 struct usb_ctrlrequest *ctrlreq =
745 (struct usb_ctrlrequest *) urb->setup_packet;
746
747 if (type != PIPE_CONTROL || !ctrlreq) {
748 dev_err(dev, "invalid request to devnum 0\n");
749 ret = -EINVAL;
750 goto no_need_xmit;
751 }
752
753 switch (ctrlreq->bRequest) {
754 case USB_REQ_SET_ADDRESS:
755 /* set_address may come when a device is reset */
756 dev_info(dev, "SetAddress Request (%d) to port %d\n",
757 ctrlreq->wValue, vdev->rhport);
758
759 usb_put_dev(vdev->udev);
760 vdev->udev = usb_get_dev(urb->dev);
761
762 spin_lock(&vdev->ud.lock);
763 vdev->ud.status = VDEV_ST_USED;
764 spin_unlock(&vdev->ud.lock);
765
766 if (urb->status == -EINPROGRESS) {
767 /* This request is successfully completed. */
768 /* If not -EINPROGRESS, possibly unlinked. */
769 urb->status = 0;
770 }
771
772 goto no_need_xmit;
773
774 case USB_REQ_GET_DESCRIPTOR:
775 if (ctrlreq->wValue == cpu_to_le16(USB_DT_DEVICE << 8))
776 usbip_dbg_vhci_hc(
777 "Not yet?:Get_Descriptor to device 0 (get max pipe size)\n");
778
779 usb_put_dev(vdev->udev);
780 vdev->udev = usb_get_dev(urb->dev);
781 goto out;
782
783 default:
784 /* NOT REACHED */
785 dev_err(dev,
786 "invalid request to devnum 0 bRequest %u, wValue %u\n",
787 ctrlreq->bRequest,
788 ctrlreq->wValue);
789 ret = -EINVAL;
790 goto no_need_xmit;
791 }
792
793 }
794
795 out:
796 vhci_tx_urb(urb, vdev);
797 spin_unlock_irqrestore(&vhci->lock, flags);
798
799 return 0;
800
801 no_need_xmit:
802 usb_hcd_unlink_urb_from_ep(hcd, urb);
803 no_need_unlink:
804 spin_unlock_irqrestore(&vhci->lock, flags);
805 if (!ret)
806 usb_hcd_giveback_urb(hcd, urb, urb->status);
807 return ret;
808 }
809
810 /*
811 * vhci_rx gives back the urb after receiving the reply of the urb. If an
812 * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives
813 * back its urb. For the driver unlinking the urb, the content of the urb is
814 * not important, but the calling to its completion handler is important; the
815 * completion of unlinking is notified by the completion handler.
816 *
817 *
818 * CLIENT SIDE
819 *
820 * - When vhci_hcd receives RET_SUBMIT,
821 *
822 * - case 1a). the urb of the pdu is not unlinking.
823 * - normal case
824 * => just give back the urb
825 *
826 * - case 1b). the urb of the pdu is unlinking.
827 * - usbip.ko will return a reply of the unlinking request.
828 * => give back the urb now and go to case 2b).
829 *
830 * - When vhci_hcd receives RET_UNLINK,
831 *
832 * - case 2a). a submit request is still pending in vhci_hcd.
833 * - urb was really pending in usbip.ko and urb_unlink_urb() was
834 * completed there.
835 * => free a pending submit request
836 * => notify unlink completeness by giving back the urb
837 *
838 * - case 2b). a submit request is *not* pending in vhci_hcd.
839 * - urb was already given back to the core driver.
840 * => do not give back the urb
841 *
842 *
843 * SERVER SIDE
844 *
845 * - When usbip receives CMD_UNLINK,
846 *
847 * - case 3a). the urb of the unlink request is now in submission.
848 * => do usb_unlink_urb().
849 * => after the unlink is completed, send RET_UNLINK.
850 *
851 * - case 3b). the urb of the unlink request is not in submission.
852 * - may be already completed or never be received
853 * => send RET_UNLINK
854 *
855 */
856 static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
857 {
858 struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd);
859 struct vhci *vhci = vhci_hcd->vhci;
860 struct vhci_priv *priv;
861 struct vhci_device *vdev;
862 unsigned long flags;
863
864 spin_lock_irqsave(&vhci->lock, flags);
865
866 priv = urb->hcpriv;
867 if (!priv) {
868 /* URB was never linked! or will be soon given back by
869 * vhci_rx. */
870 spin_unlock_irqrestore(&vhci->lock, flags);
871 return -EIDRM;
872 }
873
874 {
875 int ret = 0;
876
877 ret = usb_hcd_check_unlink_urb(hcd, urb, status);
878 if (ret) {
879 spin_unlock_irqrestore(&vhci->lock, flags);
880 return ret;
881 }
882 }
883
884 /* send unlink request here? */
885 vdev = priv->vdev;
886
887 if (!vdev->ud.tcp_socket) {
888 /* tcp connection is closed */
889 spin_lock(&vdev->priv_lock);
890
891 list_del(&priv->list);
892 kfree(priv);
893 urb->hcpriv = NULL;
894
895 spin_unlock(&vdev->priv_lock);
896
897 /*
898 * If tcp connection is alive, we have sent CMD_UNLINK.
899 * vhci_rx will receive RET_UNLINK and give back the URB.
900 * Otherwise, we give back it here.
901 */
902 usb_hcd_unlink_urb_from_ep(hcd, urb);
903
904 spin_unlock_irqrestore(&vhci->lock, flags);
905 usb_hcd_giveback_urb(hcd, urb, urb->status);
906 spin_lock_irqsave(&vhci->lock, flags);
907
908 } else {
909 /* tcp connection is alive */
910 struct vhci_unlink *unlink;
911
912 spin_lock(&vdev->priv_lock);
913
914 /* setup CMD_UNLINK pdu */
915 unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC);
916 if (!unlink) {
917 spin_unlock(&vdev->priv_lock);
918 spin_unlock_irqrestore(&vhci->lock, flags);
919 usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
920 return -ENOMEM;
921 }
922
923 unlink->seqnum = atomic_inc_return(&vhci_hcd->seqnum);
924 if (unlink->seqnum == 0xffff)
925 pr_info("seqnum max\n");
926
927 unlink->unlink_seqnum = priv->seqnum;
928
929 /* send cmd_unlink and try to cancel the pending URB in the
930 * peer */
931 list_add_tail(&unlink->list, &vdev->unlink_tx);
932 wake_up(&vdev->waitq_tx);
933
934 spin_unlock(&vdev->priv_lock);
935 }
936
937 spin_unlock_irqrestore(&vhci->lock, flags);
938
939 usbip_dbg_vhci_hc("leave\n");
940 return 0;
941 }
942
943 static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
944 {
945 struct vhci_hcd *vhci_hcd = vdev_to_vhci_hcd(vdev);
946 struct usb_hcd *hcd = vhci_hcd_to_hcd(vhci_hcd);
947 struct vhci *vhci = vhci_hcd->vhci;
948 struct vhci_unlink *unlink, *tmp;
949 unsigned long flags;
950
951 spin_lock_irqsave(&vhci->lock, flags);
952 spin_lock(&vdev->priv_lock);
953
954 list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
955 pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum);
956 list_del(&unlink->list);
957 kfree(unlink);
958 }
959
960 while (!list_empty(&vdev->unlink_rx)) {
961 struct urb *urb;
962
963 unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink,
964 list);
965
966 /* give back URB of unanswered unlink request */
967 pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum);
968
969 urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
970 if (!urb) {
971 pr_info("the urb (seqnum %lu) was already given back\n",
972 unlink->unlink_seqnum);
973 list_del(&unlink->list);
974 kfree(unlink);
975 continue;
976 }
977
978 urb->status = -ENODEV;
979
980 usb_hcd_unlink_urb_from_ep(hcd, urb);
981
982 list_del(&unlink->list);
983
984 spin_unlock(&vdev->priv_lock);
985 spin_unlock_irqrestore(&vhci->lock, flags);
986
987 usb_hcd_giveback_urb(hcd, urb, urb->status);
988
989 spin_lock_irqsave(&vhci->lock, flags);
990 spin_lock(&vdev->priv_lock);
991
992 kfree(unlink);
993 }
994
995 spin_unlock(&vdev->priv_lock);
996 spin_unlock_irqrestore(&vhci->lock, flags);
997 }
998
999 /*
1000 * The important thing is that only one context begins cleanup.
1001 * This is why error handling and cleanup become simple.
1002 * We do not want to consider race condition as possible.
1003 */
1004 static void vhci_shutdown_connection(struct usbip_device *ud)
1005 {
1006 struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
1007
1008 /* need this? see stub_dev.c */
1009 if (ud->tcp_socket) {
1010 pr_debug("shutdown tcp_socket %d\n", ud->sockfd);
1011 kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
1012 }
1013
1014 /* kill threads related to this sdev */
1015 if (vdev->ud.tcp_rx) {
1016 kthread_stop_put(vdev->ud.tcp_rx);
1017 vdev->ud.tcp_rx = NULL;
1018 }
1019 if (vdev->ud.tcp_tx) {
1020 kthread_stop_put(vdev->ud.tcp_tx);
1021 vdev->ud.tcp_tx = NULL;
1022 }
1023 pr_info("stop threads\n");
1024
1025 /* active connection is closed */
1026 if (vdev->ud.tcp_socket) {
1027 sockfd_put(vdev->ud.tcp_socket);
1028 vdev->ud.tcp_socket = NULL;
1029 vdev->ud.sockfd = -1;
1030 }
1031 pr_info("release socket\n");
1032
1033 vhci_device_unlink_cleanup(vdev);
1034
1035 /*
1036 * rh_port_disconnect() is a trigger of ...
1037 * usb_disable_device():
1038 * disable all the endpoints for a USB device.
1039 * usb_disable_endpoint():
1040 * disable endpoints. pending urbs are unlinked(dequeued).
1041 *
1042 * NOTE: After calling rh_port_disconnect(), the USB device drivers of a
1043 * detached device should release used urbs in a cleanup function (i.e.
1044 * xxx_disconnect()). Therefore, vhci_hcd does not need to release
1045 * pushed urbs and their private data in this function.
1046 *
1047 * NOTE: vhci_dequeue() must be considered carefully. When shutting down
1048 * a connection, vhci_shutdown_connection() expects vhci_dequeue()
1049 * gives back pushed urbs and frees their private data by request of
1050 * the cleanup function of a USB driver. When unlinking a urb with an
1051 * active connection, vhci_dequeue() does not give back the urb which
1052 * is actually given back by vhci_rx after receiving its return pdu.
1053 *
1054 */
1055 rh_port_disconnect(vdev);
1056
1057 pr_info("disconnect device\n");
1058 }
1059
1060 static void vhci_device_reset(struct usbip_device *ud)
1061 {
1062 struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
1063 unsigned long flags;
1064
1065 spin_lock_irqsave(&ud->lock, flags);
1066
1067 vdev->speed = 0;
1068 vdev->devid = 0;
1069
1070 usb_put_dev(vdev->udev);
1071 vdev->udev = NULL;
1072
1073 if (ud->tcp_socket) {
1074 sockfd_put(ud->tcp_socket);
1075 ud->tcp_socket = NULL;
1076 ud->sockfd = -1;
1077 }
1078 ud->status = VDEV_ST_NULL;
1079
1080 spin_unlock_irqrestore(&ud->lock, flags);
1081 }
1082
1083 static void vhci_device_unusable(struct usbip_device *ud)
1084 {
1085 unsigned long flags;
1086
1087 spin_lock_irqsave(&ud->lock, flags);
1088 ud->status = VDEV_ST_ERROR;
1089 spin_unlock_irqrestore(&ud->lock, flags);
1090 }
1091
1092 static void vhci_device_init(struct vhci_device *vdev)
1093 {
1094 memset(vdev, 0, sizeof(struct vhci_device));
1095
1096 vdev->ud.side = USBIP_VHCI;
1097 vdev->ud.status = VDEV_ST_NULL;
1098 spin_lock_init(&vdev->ud.lock);
1099
1100 INIT_LIST_HEAD(&vdev->priv_rx);
1101 INIT_LIST_HEAD(&vdev->priv_tx);
1102 INIT_LIST_HEAD(&vdev->unlink_tx);
1103 INIT_LIST_HEAD(&vdev->unlink_rx);
1104 spin_lock_init(&vdev->priv_lock);
1105
1106 init_waitqueue_head(&vdev->waitq_tx);
1107
1108 vdev->ud.eh_ops.shutdown = vhci_shutdown_connection;
1109 vdev->ud.eh_ops.reset = vhci_device_reset;
1110 vdev->ud.eh_ops.unusable = vhci_device_unusable;
1111
1112 usbip_start_eh(&vdev->ud);
1113 }
1114
1115 static int hcd_name_to_id(const char *name)
1116 {
1117 char *c;
1118 long val;
1119 int ret;
1120
1121 c = strchr(name, '.');
1122 if (c == NULL)
1123 return 0;
1124
1125 ret = kstrtol(c+1, 10, &val);
1126 if (ret < 0)
1127 return ret;
1128
1129 return val;
1130 }
1131
1132 static int vhci_setup(struct usb_hcd *hcd)
1133 {
1134 struct vhci *vhci = *((void **)dev_get_platdata(hcd->self.controller));
1135 if (usb_hcd_is_primary_hcd(hcd)) {
1136 vhci->vhci_hcd_hs = hcd_to_vhci_hcd(hcd);
1137 vhci->vhci_hcd_hs->vhci = vhci;
1138 /*
1139 * Mark the first roothub as being USB 2.0.
1140 * The USB 3.0 roothub will be registered later by
1141 * vhci_hcd_probe()
1142 */
1143 hcd->speed = HCD_USB2;
1144 hcd->self.root_hub->speed = USB_SPEED_HIGH;
1145 } else {
1146 vhci->vhci_hcd_ss = hcd_to_vhci_hcd(hcd);
1147 vhci->vhci_hcd_ss->vhci = vhci;
1148 hcd->speed = HCD_USB3;
1149 hcd->self.root_hub->speed = USB_SPEED_SUPER;
1150 }
1151 return 0;
1152 }
1153
1154 static int vhci_start(struct usb_hcd *hcd)
1155 {
1156 struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd);
1157 int id, rhport;
1158 int err;
1159
1160 usbip_dbg_vhci_hc("enter vhci_start\n");
1161
1162 if (usb_hcd_is_primary_hcd(hcd))
1163 spin_lock_init(&vhci_hcd->vhci->lock);
1164
1165 /* initialize private data of usb_hcd */
1166
1167 for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
1168 struct vhci_device *vdev = &vhci_hcd->vdev[rhport];
1169
1170 vhci_device_init(vdev);
1171 vdev->rhport = rhport;
1172 }
1173
1174 atomic_set(&vhci_hcd->seqnum, 0);
1175
1176 hcd->power_budget = 0; /* no limit */
1177 hcd->uses_new_polling = 1;
1178
1179 #ifdef CONFIG_USB_OTG
1180 hcd->self.otg_port = 1;
1181 #endif
1182
1183 id = hcd_name_to_id(hcd_name(hcd));
1184 if (id < 0) {
1185 pr_err("invalid vhci name %s\n", hcd_name(hcd));
1186 return -EINVAL;
1187 }
1188
1189 /* vhci_hcd is now ready to be controlled through sysfs */
1190 if (id == 0 && usb_hcd_is_primary_hcd(hcd)) {
1191 err = vhci_init_attr_group();
1192 if (err) {
1193 pr_err("init attr group\n");
1194 return err;
1195 }
1196 err = sysfs_create_group(&hcd_dev(hcd)->kobj, &vhci_attr_group);
1197 if (err) {
1198 pr_err("create sysfs files\n");
1199 vhci_finish_attr_group();
1200 return err;
1201 }
1202 pr_info("created sysfs %s\n", hcd_name(hcd));
1203 }
1204
1205 return 0;
1206 }
1207
1208 static void vhci_stop(struct usb_hcd *hcd)
1209 {
1210 struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd);
1211 int id, rhport;
1212
1213 usbip_dbg_vhci_hc("stop VHCI controller\n");
1214
1215 /* 1. remove the userland interface of vhci_hcd */
1216 id = hcd_name_to_id(hcd_name(hcd));
1217 if (id == 0 && usb_hcd_is_primary_hcd(hcd)) {
1218 sysfs_remove_group(&hcd_dev(hcd)->kobj, &vhci_attr_group);
1219 vhci_finish_attr_group();
1220 }
1221
1222 /* 2. shutdown all the ports of vhci_hcd */
1223 for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
1224 struct vhci_device *vdev = &vhci_hcd->vdev[rhport];
1225
1226 usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED);
1227 usbip_stop_eh(&vdev->ud);
1228 }
1229 }
1230
1231 static int vhci_get_frame_number(struct usb_hcd *hcd)
1232 {
1233 dev_err_ratelimited(&hcd->self.root_hub->dev, "Not yet implemented\n");
1234 return 0;
1235 }
1236
1237 #ifdef CONFIG_PM
1238
1239 /* FIXME: suspend/resume */
1240 static int vhci_bus_suspend(struct usb_hcd *hcd)
1241 {
1242 struct vhci *vhci = *((void **)dev_get_platdata(hcd->self.controller));
1243 unsigned long flags;
1244
1245 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
1246
1247 spin_lock_irqsave(&vhci->lock, flags);
1248 hcd->state = HC_STATE_SUSPENDED;
1249 spin_unlock_irqrestore(&vhci->lock, flags);
1250
1251 return 0;
1252 }
1253
1254 static int vhci_bus_resume(struct usb_hcd *hcd)
1255 {
1256 struct vhci *vhci = *((void **)dev_get_platdata(hcd->self.controller));
1257 int rc = 0;
1258 unsigned long flags;
1259
1260 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
1261
1262 spin_lock_irqsave(&vhci->lock, flags);
1263 if (!HCD_HW_ACCESSIBLE(hcd))
1264 rc = -ESHUTDOWN;
1265 else
1266 hcd->state = HC_STATE_RUNNING;
1267 spin_unlock_irqrestore(&vhci->lock, flags);
1268
1269 return rc;
1270 }
1271
1272 #else
1273
1274 #define vhci_bus_suspend NULL
1275 #define vhci_bus_resume NULL
1276 #endif
1277
1278 /* Change a group of bulk endpoints to support multiple stream IDs */
1279 static int vhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
1280 struct usb_host_endpoint **eps, unsigned int num_eps,
1281 unsigned int num_streams, gfp_t mem_flags)
1282 {
1283 dev_dbg(&hcd->self.root_hub->dev, "vhci_alloc_streams not implemented\n");
1284 return 0;
1285 }
1286
1287 /* Reverts a group of bulk endpoints back to not using stream IDs. */
1288 static int vhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
1289 struct usb_host_endpoint **eps, unsigned int num_eps,
1290 gfp_t mem_flags)
1291 {
1292 dev_dbg(&hcd->self.root_hub->dev, "vhci_free_streams not implemented\n");
1293 return 0;
1294 }
1295
1296 static const struct hc_driver vhci_hc_driver = {
1297 .description = driver_name,
1298 .product_desc = driver_desc,
1299 .hcd_priv_size = sizeof(struct vhci_hcd),
1300
1301 .flags = HCD_USB3 | HCD_SHARED,
1302
1303 .reset = vhci_setup,
1304 .start = vhci_start,
1305 .stop = vhci_stop,
1306
1307 .urb_enqueue = vhci_urb_enqueue,
1308 .urb_dequeue = vhci_urb_dequeue,
1309
1310 .get_frame_number = vhci_get_frame_number,
1311
1312 .hub_status_data = vhci_hub_status,
1313 .hub_control = vhci_hub_control,
1314 .bus_suspend = vhci_bus_suspend,
1315 .bus_resume = vhci_bus_resume,
1316
1317 .alloc_streams = vhci_alloc_streams,
1318 .free_streams = vhci_free_streams,
1319 };
1320
1321 static int vhci_hcd_probe(struct platform_device *pdev)
1322 {
1323 struct vhci *vhci = *((void **)dev_get_platdata(&pdev->dev));
1324 struct usb_hcd *hcd_hs;
1325 struct usb_hcd *hcd_ss;
1326 int ret;
1327
1328 usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id);
1329
1330 /*
1331 * Allocate and initialize hcd.
1332 * Our private data is also allocated automatically.
1333 */
1334 hcd_hs = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev));
1335 if (!hcd_hs) {
1336 pr_err("create primary hcd failed\n");
1337 return -ENOMEM;
1338 }
1339 hcd_hs->has_tt = 1;
1340
1341 /*
1342 * Finish generic HCD structure initialization and register.
1343 * Call the driver's reset() and start() routines.
1344 */
1345 ret = usb_add_hcd(hcd_hs, 0, 0);
1346 if (ret != 0) {
1347 pr_err("usb_add_hcd hs failed %d\n", ret);
1348 goto put_usb2_hcd;
1349 }
1350
1351 hcd_ss = usb_create_shared_hcd(&vhci_hc_driver, &pdev->dev,
1352 dev_name(&pdev->dev), hcd_hs);
1353 if (!hcd_ss) {
1354 ret = -ENOMEM;
1355 pr_err("create shared hcd failed\n");
1356 goto remove_usb2_hcd;
1357 }
1358
1359 ret = usb_add_hcd(hcd_ss, 0, 0);
1360 if (ret) {
1361 pr_err("usb_add_hcd ss failed %d\n", ret);
1362 goto put_usb3_hcd;
1363 }
1364
1365 usbip_dbg_vhci_hc("bye\n");
1366 return 0;
1367
1368 put_usb3_hcd:
1369 usb_put_hcd(hcd_ss);
1370 remove_usb2_hcd:
1371 usb_remove_hcd(hcd_hs);
1372 put_usb2_hcd:
1373 usb_put_hcd(hcd_hs);
1374 vhci->vhci_hcd_hs = NULL;
1375 vhci->vhci_hcd_ss = NULL;
1376 return ret;
1377 }
1378
1379 static int vhci_hcd_remove(struct platform_device *pdev)
1380 {
1381 struct vhci *vhci = *((void **)dev_get_platdata(&pdev->dev));
1382
1383 /*
1384 * Disconnects the root hub,
1385 * then reverses the effects of usb_add_hcd(),
1386 * invoking the HCD's stop() methods.
1387 */
1388 usb_remove_hcd(vhci_hcd_to_hcd(vhci->vhci_hcd_ss));
1389 usb_put_hcd(vhci_hcd_to_hcd(vhci->vhci_hcd_ss));
1390
1391 usb_remove_hcd(vhci_hcd_to_hcd(vhci->vhci_hcd_hs));
1392 usb_put_hcd(vhci_hcd_to_hcd(vhci->vhci_hcd_hs));
1393
1394 vhci->vhci_hcd_hs = NULL;
1395 vhci->vhci_hcd_ss = NULL;
1396
1397 return 0;
1398 }
1399
1400 #ifdef CONFIG_PM
1401
1402 /* what should happen for USB/IP under suspend/resume? */
1403 static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state)
1404 {
1405 struct usb_hcd *hcd;
1406 struct vhci *vhci;
1407 int rhport;
1408 int connected = 0;
1409 int ret = 0;
1410 unsigned long flags;
1411
1412 dev_dbg(&pdev->dev, "%s\n", __func__);
1413
1414 hcd = platform_get_drvdata(pdev);
1415 if (!hcd)
1416 return 0;
1417
1418 vhci = *((void **)dev_get_platdata(hcd->self.controller));
1419
1420 spin_lock_irqsave(&vhci->lock, flags);
1421
1422 for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
1423 if (vhci->vhci_hcd_hs->port_status[rhport] &
1424 USB_PORT_STAT_CONNECTION)
1425 connected += 1;
1426
1427 if (vhci->vhci_hcd_ss->port_status[rhport] &
1428 USB_PORT_STAT_CONNECTION)
1429 connected += 1;
1430 }
1431
1432 spin_unlock_irqrestore(&vhci->lock, flags);
1433
1434 if (connected > 0) {
1435 dev_info(&pdev->dev,
1436 "We have %d active connection%s. Do not suspend.\n",
1437 connected, (connected == 1 ? "" : "s"));
1438 ret = -EBUSY;
1439 } else {
1440 dev_info(&pdev->dev, "suspend vhci_hcd");
1441 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1442 }
1443
1444 return ret;
1445 }
1446
1447 static int vhci_hcd_resume(struct platform_device *pdev)
1448 {
1449 struct usb_hcd *hcd;
1450
1451 dev_dbg(&pdev->dev, "%s\n", __func__);
1452
1453 hcd = platform_get_drvdata(pdev);
1454 if (!hcd)
1455 return 0;
1456 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1457 usb_hcd_poll_rh_status(hcd);
1458
1459 return 0;
1460 }
1461
1462 #else
1463
1464 #define vhci_hcd_suspend NULL
1465 #define vhci_hcd_resume NULL
1466
1467 #endif
1468
1469 static struct platform_driver vhci_driver = {
1470 .probe = vhci_hcd_probe,
1471 .remove = vhci_hcd_remove,
1472 .suspend = vhci_hcd_suspend,
1473 .resume = vhci_hcd_resume,
1474 .driver = {
1475 .name = driver_name,
1476 },
1477 };
1478
1479 static void del_platform_devices(void)
1480 {
1481 struct platform_device *pdev;
1482 int i;
1483
1484 for (i = 0; i < vhci_num_controllers; i++) {
1485 pdev = vhcis[i].pdev;
1486 if (pdev != NULL)
1487 platform_device_unregister(pdev);
1488 vhcis[i].pdev = NULL;
1489 }
1490 sysfs_remove_link(&platform_bus.kobj, driver_name);
1491 }
1492
1493 static int __init vhci_hcd_init(void)
1494 {
1495 int i, ret;
1496
1497 if (usb_disabled())
1498 return -ENODEV;
1499
1500 if (vhci_num_controllers < 1)
1501 vhci_num_controllers = 1;
1502
1503 vhcis = kcalloc(vhci_num_controllers, sizeof(struct vhci), GFP_KERNEL);
1504 if (vhcis == NULL)
1505 return -ENOMEM;
1506
1507 for (i = 0; i < vhci_num_controllers; i++) {
1508 vhcis[i].pdev = platform_device_alloc(driver_name, i);
1509 if (!vhcis[i].pdev) {
1510 i--;
1511 while (i >= 0)
1512 platform_device_put(vhcis[i--].pdev);
1513 ret = -ENOMEM;
1514 goto err_device_alloc;
1515 }
1516 }
1517 for (i = 0; i < vhci_num_controllers; i++) {
1518 void *vhci = &vhcis[i];
1519 ret = platform_device_add_data(vhcis[i].pdev, &vhci, sizeof(void *));
1520 if (ret)
1521 goto err_driver_register;
1522 }
1523
1524 ret = platform_driver_register(&vhci_driver);
1525 if (ret)
1526 goto err_driver_register;
1527
1528 for (i = 0; i < vhci_num_controllers; i++) {
1529 ret = platform_device_add(vhcis[i].pdev);
1530 if (ret < 0) {
1531 i--;
1532 while (i >= 0)
1533 platform_device_del(vhcis[i--].pdev);
1534 goto err_add_hcd;
1535 }
1536 }
1537
1538 return ret;
1539
1540 err_add_hcd:
1541 platform_driver_unregister(&vhci_driver);
1542 err_driver_register:
1543 for (i = 0; i < vhci_num_controllers; i++)
1544 platform_device_put(vhcis[i].pdev);
1545 err_device_alloc:
1546 kfree(vhcis);
1547 return ret;
1548 }
1549
1550 static void __exit vhci_hcd_exit(void)
1551 {
1552 del_platform_devices();
1553 platform_driver_unregister(&vhci_driver);
1554 kfree(vhcis);
1555 }
1556
1557 module_init(vhci_hcd_init);
1558 module_exit(vhci_hcd_exit);
1559
1560 MODULE_AUTHOR(DRIVER_AUTHOR);
1561 MODULE_DESCRIPTION(DRIVER_DESC);
1562 MODULE_LICENSE("GPL");
Linux with added FPC-III support